#include <proto/filters.h>
#include <proto/frontend.h>
#include <proto/log.h>
-#include <proto/hdr_idx.h>
#include <proto/hlua.h>
#include <proto/pattern.h>
#include <proto/proto_tcp.h>
#include <proto/pattern.h>
#include <proto/vars.h>
-/* This function handles a server error at the stream interface level. The
- * stream interface is assumed to be already in a closed state. An optional
- * message is copied into the input buffer.
- * The error flags are set to the values in arguments. Any pending request
- * in this buffer will be lost.
- */
-static void http_server_error(struct stream *s, struct stream_interface *si,
- int err, int finst, const struct buffer *msg)
-{
- if (IS_HTX_STRM(s))
- return htx_server_error(s, si, err, finst, msg);
-
- FLT_STRM_CB(s, flt_http_reply(s, s->txn->status, msg));
- channel_auto_read(si_oc(si));
- channel_abort(si_oc(si));
- channel_auto_close(si_oc(si));
- channel_erase(si_oc(si));
- channel_auto_close(si_ic(si));
- channel_auto_read(si_ic(si));
- if (msg)
- co_inject(si_ic(si), msg->area, msg->data);
- if (!(s->flags & SF_ERR_MASK))
- s->flags |= err;
- if (!(s->flags & SF_FINST_MASK))
- s->flags |= finst;
-}
-
-/* This function returns the appropriate error location for the given stream
- * and message.
- */
-
-struct buffer *http_error_message(struct stream *s)
-{
- const int msgnum = http_get_status_idx(s->txn->status);
-
- if (IS_HTX_STRM(s))
- return htx_error_message(s);
-
- if (s->be->errmsg[msgnum].area)
- return &s->be->errmsg[msgnum];
- else if (strm_fe(s)->errmsg[msgnum].area)
- return &strm_fe(s)->errmsg[msgnum];
- else
- return &http_err_chunks[msgnum];
-}
-
-void
-http_reply_and_close(struct stream *s, short status, struct buffer *msg)
-{
- if (IS_HTX_STRM(s))
- return htx_reply_and_close(s, status, msg);
-
- s->txn->flags &= ~TX_WAIT_NEXT_RQ;
- FLT_STRM_CB(s, flt_http_reply(s, status, msg));
- si_retnclose(&s->si[0], msg);
-}
-
-/* Parse the URI from the given transaction (which is assumed to be in request
- * phase) and look for the "/" beginning the PATH. If not found, return NULL.
- * It is returned otherwise.
- */
-char *http_txn_get_path(const struct http_txn *txn)
-{
- struct ist ret;
-
- if (!txn->req.chn->buf.size)
- return NULL;
-
- ret = http_get_path(ist2(ci_head(txn->req.chn) + txn->req.sl.rq.u, txn->req.sl.rq.u_l));
-
- return ret.ptr;
-}
-
-/* Returns a 302 for a redirectable request that reaches a server working in
- * in redirect mode. This may only be called just after the stream interface
- * has moved to SI_ST_ASS. Unprocessable requests are left unchanged and will
- * follow normal proxy processing. NOTE: this function is designed to support
- * being called once data are scheduled for forwarding.
- */
-void http_perform_server_redirect(struct stream *s, struct stream_interface *si)
-{
- struct http_txn *txn;
- struct server *srv;
- char *path;
- int len, rewind;
-
- if (IS_HTX_STRM(s))
- return htx_perform_server_redirect(s, si);
-
- /* 1: create the response header */
- trash.data = strlen(HTTP_302);
- memcpy(trash.area, HTTP_302, trash.data);
-
- srv = __objt_server(s->target);
-
- /* 2: add the server's prefix */
- if (trash.data + srv->rdr_len > trash.size)
- return;
-
- /* special prefix "/" means don't change URL */
- if (srv->rdr_len != 1 || *srv->rdr_pfx != '/') {
- memcpy(trash.area + trash.data, srv->rdr_pfx, srv->rdr_len);
- trash.data += srv->rdr_len;
- }
-
- /* 3: add the request URI. Since it was already forwarded, we need
- * to temporarily rewind the buffer.
- */
- txn = s->txn;
- c_rew(&s->req, rewind = http_hdr_rewind(&txn->req));
-
- path = http_txn_get_path(txn);
- len = b_dist(&s->req.buf, path, c_ptr(&s->req, txn->req.sl.rq.u + txn->req.sl.rq.u_l));
-
- c_adv(&s->req, rewind);
-
- if (!path)
- return;
-
- if (trash.data + len > trash.size - 4) /* 4 for CRLF-CRLF */
- return;
-
- memcpy(trash.area + trash.data, path, len);
- trash.data += len;
-
- if (unlikely(txn->flags & TX_USE_PX_CONN)) {
- memcpy(trash.area + trash.data,
- "\r\nProxy-Connection: close\r\n\r\n", 29);
- trash.data += 29;
- } else {
- memcpy(trash.area + trash.data,
- "\r\nConnection: close\r\n\r\n", 23);
- trash.data += 23;
- }
-
- /* prepare to return without error. */
- si_shutr(si);
- si_shutw(si);
- si->err_type = SI_ET_NONE;
- si->state = SI_ST_CLO;
-
- /* send the message */
- txn->status = 302;
- http_server_error(s, si, SF_ERR_LOCAL, SF_FINST_C, &trash);
-
- /* FIXME: we should increase a counter of redirects per server and per backend. */
- srv_inc_sess_ctr(srv);
- srv_set_sess_last(srv);
-}
-
-/* Return the error message corresponding to si->err_type. It is assumed
- * that the server side is closed. Note that err_type is actually a
- * bitmask, where almost only aborts may be cumulated with other
- * values. We consider that aborted operations are more important
- * than timeouts or errors due to the fact that nobody else in the
- * logs might explain incomplete retries. All others should avoid
- * being cumulated. It should normally not be possible to have multiple
- * aborts at once, but just in case, the first one in sequence is reported.
- * Note that connection errors appearing on the second request of a keep-alive
- * connection are not reported since this allows the client to retry.
- */
-void http_return_srv_error(struct stream *s, struct stream_interface *si)
-{
- int err_type = si->err_type;
-
- /* set s->txn->status for http_error_message(s) */
- s->txn->status = 503;
-
- if (err_type & SI_ET_QUEUE_ABRT)
- http_server_error(s, si, SF_ERR_CLICL, SF_FINST_Q,
- http_error_message(s));
- else if (err_type & SI_ET_CONN_ABRT)
- http_server_error(s, si, SF_ERR_CLICL, SF_FINST_C,
- (s->txn->flags & TX_NOT_FIRST) ? NULL :
- http_error_message(s));
- else if (err_type & SI_ET_QUEUE_TO)
- http_server_error(s, si, SF_ERR_SRVTO, SF_FINST_Q,
- http_error_message(s));
- else if (err_type & SI_ET_QUEUE_ERR)
- http_server_error(s, si, SF_ERR_SRVCL, SF_FINST_Q,
- http_error_message(s));
- else if (err_type & SI_ET_CONN_TO)
- http_server_error(s, si, SF_ERR_SRVTO, SF_FINST_C,
- (s->txn->flags & TX_NOT_FIRST) ? NULL :
- http_error_message(s));
- else if (err_type & SI_ET_CONN_ERR)
- http_server_error(s, si, SF_ERR_SRVCL, SF_FINST_C,
- (s->flags & SF_SRV_REUSED) ? NULL :
- http_error_message(s));
- else if (err_type & SI_ET_CONN_RES)
- http_server_error(s, si, SF_ERR_RESOURCE, SF_FINST_C,
- (s->txn->flags & TX_NOT_FIRST) ? NULL :
- http_error_message(s));
- else { /* SI_ET_CONN_OTHER and others */
- s->txn->status = 500;
- http_server_error(s, si, SF_ERR_INTERNAL, SF_FINST_C,
- http_error_message(s));
- }
-}
-
-extern const char sess_term_cond[8];
-extern const char sess_fin_state[8];
-extern const char *monthname[12];
-
-DECLARE_POOL(pool_head_http_txn, "http_txn", sizeof(struct http_txn));
-DECLARE_POOL(pool_head_uniqueid, "uniqueid", UNIQUEID_LEN);
-
-struct pool_head *pool_head_requri = NULL;
-struct pool_head *pool_head_capture = NULL;
-
-/*
- * Capture headers from message starting at <som> according to header list
- * <cap_hdr>, and fill the <cap> pointers appropriately.
- */
-void http_capture_headers(char *som, struct hdr_idx *idx,
- char **cap, struct cap_hdr *cap_hdr)
-{
- char *eol, *sol, *col, *sov;
- int cur_idx;
- struct cap_hdr *h;
- int len;
-
- sol = som + hdr_idx_first_pos(idx);
- cur_idx = hdr_idx_first_idx(idx);
-
- while (cur_idx) {
- eol = sol + idx->v[cur_idx].len;
-
- col = sol;
- while (col < eol && *col != ':')
- col++;
-
- sov = col + 1;
- while (sov < eol && HTTP_IS_LWS(*sov))
- sov++;
-
- for (h = cap_hdr; h; h = h->next) {
- if (h->namelen && (h->namelen == col - sol) &&
- (strncasecmp(sol, h->name, h->namelen) == 0)) {
- if (cap[h->index] == NULL)
- cap[h->index] =
- pool_alloc(h->pool);
-
- if (cap[h->index] == NULL) {
- ha_alert("HTTP capture : out of memory.\n");
- continue;
- }
-
- len = eol - sov;
- if (len > h->len)
- len = h->len;
-
- memcpy(cap[h->index], sov, len);
- cap[h->index][len]=0;
- }
- }
- sol = eol + idx->v[cur_idx].cr + 1;
- cur_idx = idx->v[cur_idx].next;
- }
-}
-
-/* convert an HTTP/0.9 request into an HTTP/1.0 request. Returns 1 if the
- * conversion succeeded, 0 in case of error. If the request was already 1.X,
- * nothing is done and 1 is returned.
- */
-int http_upgrade_v09_to_v10(struct http_txn *txn)
-{
- int delta;
- char *cur_end;
- struct http_msg *msg = &txn->req;
-
- if (msg->sl.rq.v_l != 0)
- return 1;
-
- /* RFC 1945 allows only GET for HTTP/0.9 requests */
- if (txn->meth != HTTP_METH_GET)
- return 0;
-
- cur_end = ci_head(msg->chn) + msg->sl.rq.l;
-
- if (msg->sl.rq.u_l == 0) {
- /* HTTP/0.9 requests *must* have a request URI, per RFC 1945 */
- return 0;
- }
- /* add HTTP version */
- delta = b_rep_blk(&msg->chn->buf, cur_end, cur_end, " HTTP/1.0\r\n", 11);
- http_msg_move_end(msg, delta);
- cur_end += delta;
- cur_end = (char *)http_parse_reqline(msg,
- HTTP_MSG_RQMETH,
- ci_head(msg->chn), cur_end + 1,
- NULL, NULL);
- if (unlikely(!cur_end))
- return 0;
-
- /* we have a full HTTP/1.0 request now and we know that
- * we have either a CR or an LF at <ptr>.
- */
- hdr_idx_set_start(&txn->hdr_idx, msg->sl.rq.l, *cur_end == '\r');
- return 1;
-}
-
-/* Parse the Connection: header of an HTTP request, looking for both "close"
- * and "keep-alive" values. If we already know that some headers may safely
- * be removed, we remove them now. The <to_del> flags are used for that :
- * - bit 0 means remove "close" headers (in HTTP/1.0 requests/responses)
- * - bit 1 means remove "keep-alive" headers (in HTTP/1.1 reqs/resp to 1.1).
- * Presence of the "Upgrade" token is also checked and reported.
- * The TX_HDR_CONN_* flags are adjusted in txn->flags depending on what was
- * found, and TX_CON_*_SET is adjusted depending on what is left so only
- * harmless combinations may be removed. Do not call that after changes have
- * been processed.
- */
-void http_parse_connection_header(struct http_txn *txn, struct http_msg *msg, int to_del)
-{
- struct hdr_ctx ctx;
- const char *hdr_val = "Connection";
- int hdr_len = 10;
-
- if (txn->flags & TX_HDR_CONN_PRS)
- return;
-
- if (unlikely(txn->flags & TX_USE_PX_CONN)) {
- hdr_val = "Proxy-Connection";
- hdr_len = 16;
- }
-
- ctx.idx = 0;
- txn->flags &= ~(TX_CON_KAL_SET|TX_CON_CLO_SET);
- while (http_find_header2(hdr_val, hdr_len, ci_head(msg->chn), &txn->hdr_idx, &ctx)) {
- if (ctx.vlen >= 10 && word_match(ctx.line + ctx.val, ctx.vlen, "keep-alive", 10)) {
- txn->flags |= TX_HDR_CONN_KAL;
- if (to_del & 2)
- http_remove_header2(msg, &txn->hdr_idx, &ctx);
- else
- txn->flags |= TX_CON_KAL_SET;
- }
- else if (ctx.vlen >= 5 && word_match(ctx.line + ctx.val, ctx.vlen, "close", 5)) {
- txn->flags |= TX_HDR_CONN_CLO;
- if (to_del & 1)
- http_remove_header2(msg, &txn->hdr_idx, &ctx);
- else
- txn->flags |= TX_CON_CLO_SET;
- }
- else if (ctx.vlen >= 7 && word_match(ctx.line + ctx.val, ctx.vlen, "upgrade", 7)) {
- txn->flags |= TX_HDR_CONN_UPG;
- }
- }
-
- txn->flags |= TX_HDR_CONN_PRS;
- return;
-}
-
-/* Apply desired changes on the Connection: header. Values may be removed and/or
- * added depending on the <wanted> flags, which are exclusively composed of
- * TX_CON_CLO_SET and TX_CON_KAL_SET, depending on what flags are desired. The
- * TX_CON_*_SET flags are adjusted in txn->flags depending on what is left.
- */
-void http_change_connection_header(struct http_txn *txn, struct http_msg *msg, int wanted)
-{
- struct hdr_ctx ctx;
- const char *hdr_val = "Connection";
- int hdr_len = 10;
-
- ctx.idx = 0;
-
-
- if (unlikely(txn->flags & TX_USE_PX_CONN)) {
- hdr_val = "Proxy-Connection";
- hdr_len = 16;
- }
-
- txn->flags &= ~(TX_CON_CLO_SET | TX_CON_KAL_SET);
- while (http_find_header2(hdr_val, hdr_len, ci_head(msg->chn), &txn->hdr_idx, &ctx)) {
- if (ctx.vlen >= 10 && word_match(ctx.line + ctx.val, ctx.vlen, "keep-alive", 10)) {
- if (wanted & TX_CON_KAL_SET)
- txn->flags |= TX_CON_KAL_SET;
- else
- http_remove_header2(msg, &txn->hdr_idx, &ctx);
- }
- else if (ctx.vlen >= 5 && word_match(ctx.line + ctx.val, ctx.vlen, "close", 5)) {
- if (wanted & TX_CON_CLO_SET)
- txn->flags |= TX_CON_CLO_SET;
- else
- http_remove_header2(msg, &txn->hdr_idx, &ctx);
- }
- }
-
- if (wanted == (txn->flags & (TX_CON_CLO_SET|TX_CON_KAL_SET)))
- return;
-
- if ((wanted & TX_CON_CLO_SET) && !(txn->flags & TX_CON_CLO_SET)) {
- txn->flags |= TX_CON_CLO_SET;
- hdr_val = "Connection: close";
- hdr_len = 17;
- if (unlikely(txn->flags & TX_USE_PX_CONN)) {
- hdr_val = "Proxy-Connection: close";
- hdr_len = 23;
- }
- http_header_add_tail2(msg, &txn->hdr_idx, hdr_val, hdr_len);
- }
-
- if ((wanted & TX_CON_KAL_SET) && !(txn->flags & TX_CON_KAL_SET)) {
- txn->flags |= TX_CON_KAL_SET;
- hdr_val = "Connection: keep-alive";
- hdr_len = 22;
- if (unlikely(txn->flags & TX_USE_PX_CONN)) {
- hdr_val = "Proxy-Connection: keep-alive";
- hdr_len = 28;
- }
- http_header_add_tail2(msg, &txn->hdr_idx, hdr_val, hdr_len);
- }
- return;
-}
-
-void http_adjust_conn_mode(struct stream *s, struct http_txn *txn, struct http_msg *msg)
-{
- struct proxy *fe = strm_fe(s);
- int tmp = TX_CON_WANT_KAL;
-
- if (IS_HTX_STRM(s))
- return;
-
- if ((fe->options & PR_O_HTTP_MODE) == PR_O_HTTP_TUN ||
- (s->be->options & PR_O_HTTP_MODE) == PR_O_HTTP_TUN)
- tmp = TX_CON_WANT_TUN;
-
- if ((fe->options & PR_O_HTTP_MODE) == PR_O_HTTP_SCL ||
- (s->be->options & PR_O_HTTP_MODE) == PR_O_HTTP_SCL)
- tmp = TX_CON_WANT_SCL;
-
- if ((fe->options & PR_O_HTTP_MODE) == PR_O_HTTP_CLO ||
- (s->be->options & PR_O_HTTP_MODE) == PR_O_HTTP_CLO)
- tmp = TX_CON_WANT_CLO;
-
- if ((txn->flags & TX_CON_WANT_MSK) < tmp)
- txn->flags = (txn->flags & ~TX_CON_WANT_MSK) | tmp;
-
- if (!(txn->flags & TX_HDR_CONN_PRS) &&
- (txn->flags & TX_CON_WANT_MSK) != TX_CON_WANT_TUN) {
- /* parse the Connection header and possibly clean it */
- int to_del = 0;
- if ((msg->flags & HTTP_MSGF_VER_11) ||
- ((txn->flags & TX_CON_WANT_MSK) >= TX_CON_WANT_SCL &&
- !((fe->options2|s->be->options2) & PR_O2_FAKE_KA)))
- to_del |= 2; /* remove "keep-alive" */
- if (!(msg->flags & HTTP_MSGF_VER_11))
- to_del |= 1; /* remove "close" */
- http_parse_connection_header(txn, msg, to_del);
- }
-
- /* check if client or config asks for explicit close in KAL/SCL */
- if (((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_KAL ||
- (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL) &&
- ((txn->flags & TX_HDR_CONN_CLO) || /* "connection: close" */
- (!(msg->flags & HTTP_MSGF_VER_11) && !(txn->flags & TX_HDR_CONN_KAL)) || /* no "connection: k-a" in 1.0 */
- !(msg->flags & HTTP_MSGF_XFER_LEN) || /* no length known => close */
- fe->state == PR_STSTOPPED)) /* frontend is stopping */
- txn->flags = (txn->flags & ~TX_CON_WANT_MSK) | TX_CON_WANT_CLO;
-}
-
-/* This stream analyser waits for a complete HTTP request. It returns 1 if the
- * processing can continue on next analysers, or zero if it either needs more
- * data or wants to immediately abort the request (eg: timeout, error, ...). It
- * is tied to AN_REQ_WAIT_HTTP and may may remove itself from s->req.analysers
- * when it has nothing left to do, and may remove any analyser when it wants to
- * abort.
- */
-int http_wait_for_request(struct stream *s, struct channel *req, int an_bit)
-{
- /*
- * We will parse the partial (or complete) lines.
- * We will check the request syntax, and also join multi-line
- * headers. An index of all the lines will be elaborated while
- * parsing.
- *
- * For the parsing, we use a 28 states FSM.
- *
- * Here is the information we currently have :
- * ci_head(req) = beginning of request
- * ci_head(req) + msg->eoh = end of processed headers / start of current one
- * ci_tail(req) = end of input data
- * msg->eol = end of current header or line (LF or CRLF)
- * msg->next = first non-visited byte
- *
- * At end of parsing, we may perform a capture of the error (if any), and
- * we will set a few fields (txn->meth, sn->flags/SF_REDIRECTABLE).
- * We also check for monitor-uri, logging, HTTP/0.9 to 1.0 conversion, and
- * finally headers capture.
- */
-
- int cur_idx;
- struct session *sess = s->sess;
- struct http_txn *txn = s->txn;
- struct http_msg *msg = &txn->req;
- struct hdr_ctx ctx;
-
- if (IS_HTX_STRM(s))
- return htx_wait_for_request(s, req, an_bit);
-
- DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%lu analysers=%02x\n",
- now_ms, __FUNCTION__,
- s,
- req,
- req->rex, req->wex,
- req->flags,
- ci_data(req),
- req->analysers);
-
- /* we're speaking HTTP here, so let's speak HTTP to the client */
- s->srv_error = http_return_srv_error;
-
- /* If there is data available for analysis, log the end of the idle time. */
- if (c_data(req) && s->logs.t_idle == -1)
- s->logs.t_idle = tv_ms_elapsed(&s->logs.tv_accept, &now) - s->logs.t_handshake;
-
- /* There's a protected area at the end of the buffer for rewriting
- * purposes. We don't want to start to parse the request if the
- * protected area is affected, because we may have to move processed
- * data later, which is much more complicated.
- */
- if (c_data(req) && msg->msg_state < HTTP_MSG_ERROR) {
- if (txn->flags & TX_NOT_FIRST) {
- if (unlikely(!channel_is_rewritable(req))) {
- if (req->flags & (CF_SHUTW|CF_SHUTW_NOW|CF_WRITE_ERROR|CF_WRITE_TIMEOUT))
- goto failed_keep_alive;
- /* some data has still not left the buffer, wake us once that's done */
- channel_dont_connect(req);
- req->flags |= CF_READ_DONTWAIT; /* try to get back here ASAP */
- req->flags |= CF_WAKE_WRITE;
- return 0;
- }
- if (unlikely(ci_tail(req) < c_ptr(req, msg->next) ||
- ci_tail(req) > b_wrap(&req->buf) - global.tune.maxrewrite))
- channel_slow_realign(req, trash.area);
- }
-
- if (likely(msg->next < ci_data(req))) /* some unparsed data are available */
- http_msg_analyzer(msg, &txn->hdr_idx);
- }
-
- /* 1: we might have to print this header in debug mode */
- if (unlikely((global.mode & MODE_DEBUG) &&
- (!(global.mode & MODE_QUIET) || (global.mode & MODE_VERBOSE)) &&
- msg->msg_state >= HTTP_MSG_BODY)) {
- char *eol, *sol;
-
- sol = ci_head(req);
- /* this is a bit complex : in case of error on the request line,
- * we know that rq.l is still zero, so we display only the part
- * up to the end of the line (truncated by debug_hdr).
- */
- eol = sol + (msg->sl.rq.l ? msg->sl.rq.l : ci_data(req));
- debug_hdr("clireq", s, sol, eol);
-
- sol += hdr_idx_first_pos(&txn->hdr_idx);
- cur_idx = hdr_idx_first_idx(&txn->hdr_idx);
-
- while (cur_idx) {
- eol = sol + txn->hdr_idx.v[cur_idx].len;
- debug_hdr("clihdr", s, sol, eol);
- sol = eol + txn->hdr_idx.v[cur_idx].cr + 1;
- cur_idx = txn->hdr_idx.v[cur_idx].next;
- }
- }
-
-
- /*
- * Now we quickly check if we have found a full valid request.
- * If not so, we check the FD and buffer states before leaving.
- * A full request is indicated by the fact that we have seen
- * the double LF/CRLF, so the state is >= HTTP_MSG_BODY. Invalid
- * requests are checked first. When waiting for a second request
- * on a keep-alive stream, if we encounter and error, close, t/o,
- * we note the error in the stream flags but don't set any state.
- * Since the error will be noted there, it will not be counted by
- * process_stream() as a frontend error.
- * Last, we may increase some tracked counters' http request errors on
- * the cases that are deliberately the client's fault. For instance,
- * a timeout or connection reset is not counted as an error. However
- * a bad request is.
- */
-
- if (unlikely(msg->msg_state < HTTP_MSG_BODY)) {
- /*
- * First, let's catch bad requests.
- */
- if (unlikely(msg->msg_state == HTTP_MSG_ERROR)) {
- stream_inc_http_req_ctr(s);
- stream_inc_http_err_ctr(s);
- proxy_inc_fe_req_ctr(sess->fe);
- goto return_bad_req;
- }
-
- /* 1: Since we are in header mode, if there's no space
- * left for headers, we won't be able to free more
- * later, so the stream will never terminate. We
- * must terminate it now.
- */
- if (unlikely(channel_full(req, global.tune.maxrewrite))) {
- /* FIXME: check if URI is set and return Status
- * 414 Request URI too long instead.
- */
- stream_inc_http_req_ctr(s);
- stream_inc_http_err_ctr(s);
- proxy_inc_fe_req_ctr(sess->fe);
- if (msg->err_pos < 0)
- msg->err_pos = ci_data(req);
- goto return_bad_req;
- }
-
- /* 2: have we encountered a read error ? */
- else if (req->flags & CF_READ_ERROR) {
- if (!(s->flags & SF_ERR_MASK))
- s->flags |= SF_ERR_CLICL;
-
- if (txn->flags & TX_WAIT_NEXT_RQ)
- goto failed_keep_alive;
-
- if (sess->fe->options & PR_O_IGNORE_PRB)
- goto failed_keep_alive;
-
- /* we cannot return any message on error */
- if (msg->err_pos >= 0) {
- http_capture_bad_message(sess->fe, s, msg, msg->err_state, sess->fe);
- stream_inc_http_err_ctr(s);
- }
-
- txn->status = 400;
- msg->err_state = msg->msg_state;
- msg->msg_state = HTTP_MSG_ERROR;
- http_reply_and_close(s, txn->status, NULL);
- req->analysers &= AN_REQ_FLT_END;
- stream_inc_http_req_ctr(s);
- proxy_inc_fe_req_ctr(sess->fe);
- _HA_ATOMIC_ADD(&sess->fe->fe_counters.failed_req, 1);
- if (sess->listener->counters)
- _HA_ATOMIC_ADD(&sess->listener->counters->failed_req, 1);
-
- if (!(s->flags & SF_FINST_MASK))
- s->flags |= SF_FINST_R;
- return 0;
- }
-
- /* 3: has the read timeout expired ? */
- else if (req->flags & CF_READ_TIMEOUT || tick_is_expired(req->analyse_exp, now_ms)) {
- if (!(s->flags & SF_ERR_MASK))
- s->flags |= SF_ERR_CLITO;
-
- if (txn->flags & TX_WAIT_NEXT_RQ)
- goto failed_keep_alive;
-
- if (sess->fe->options & PR_O_IGNORE_PRB)
- goto failed_keep_alive;
-
- /* read timeout : give up with an error message. */
- if (msg->err_pos >= 0) {
- http_capture_bad_message(sess->fe, s, msg, msg->err_state, sess->fe);
- stream_inc_http_err_ctr(s);
- }
- txn->status = 408;
- msg->err_state = msg->msg_state;
- msg->msg_state = HTTP_MSG_ERROR;
- http_reply_and_close(s, txn->status, http_error_message(s));
- req->analysers &= AN_REQ_FLT_END;
-
- stream_inc_http_req_ctr(s);
- proxy_inc_fe_req_ctr(sess->fe);
- _HA_ATOMIC_ADD(&sess->fe->fe_counters.failed_req, 1);
- if (sess->listener->counters)
- _HA_ATOMIC_ADD(&sess->listener->counters->failed_req, 1);
-
- if (!(s->flags & SF_FINST_MASK))
- s->flags |= SF_FINST_R;
- return 0;
- }
-
- /* 4: have we encountered a close ? */
- else if (req->flags & CF_SHUTR) {
- if (!(s->flags & SF_ERR_MASK))
- s->flags |= SF_ERR_CLICL;
-
- if (txn->flags & TX_WAIT_NEXT_RQ)
- goto failed_keep_alive;
-
- if (sess->fe->options & PR_O_IGNORE_PRB)
- goto failed_keep_alive;
-
- if (msg->err_pos >= 0)
- http_capture_bad_message(sess->fe, s, msg, msg->err_state, sess->fe);
- txn->status = 400;
- msg->err_state = msg->msg_state;
- msg->msg_state = HTTP_MSG_ERROR;
- http_reply_and_close(s, txn->status, http_error_message(s));
- req->analysers &= AN_REQ_FLT_END;
- stream_inc_http_err_ctr(s);
- stream_inc_http_req_ctr(s);
- proxy_inc_fe_req_ctr(sess->fe);
- _HA_ATOMIC_ADD(&sess->fe->fe_counters.failed_req, 1);
- if (sess->listener->counters)
- _HA_ATOMIC_ADD(&sess->listener->counters->failed_req, 1);
-
- if (!(s->flags & SF_FINST_MASK))
- s->flags |= SF_FINST_R;
- return 0;
- }
-
- channel_dont_connect(req);
- req->flags |= CF_READ_DONTWAIT; /* try to get back here ASAP */
- s->res.flags &= ~CF_EXPECT_MORE; /* speed up sending a previous response */
-
- if (sess->listener->options & LI_O_NOQUICKACK && ci_data(req)) {
- /* We need more data, we have to re-enable quick-ack in case we
- * previously disabled it, otherwise we might cause the client
- * to delay next data.
- */
- conn_set_quickack(objt_conn(sess->origin), 1);
- }
-
- if ((msg->msg_state != HTTP_MSG_RQBEFORE) && (txn->flags & TX_WAIT_NEXT_RQ)) {
- /* If the client starts to talk, let's fall back to
- * request timeout processing.
- */
- txn->flags &= ~TX_WAIT_NEXT_RQ;
- req->analyse_exp = TICK_ETERNITY;
- }
-
- /* just set the request timeout once at the beginning of the request */
- if (!tick_isset(req->analyse_exp)) {
- if ((msg->msg_state == HTTP_MSG_RQBEFORE) &&
- (txn->flags & TX_WAIT_NEXT_RQ) &&
- tick_isset(s->be->timeout.httpka))
- req->analyse_exp = tick_add(now_ms, s->be->timeout.httpka);
- else
- req->analyse_exp = tick_add_ifset(now_ms, s->be->timeout.httpreq);
- }
-
- /* we're not ready yet */
- return 0;
-
- failed_keep_alive:
- /* Here we process low-level errors for keep-alive requests. In
- * short, if the request is not the first one and it experiences
- * a timeout, read error or shutdown, we just silently close so
- * that the client can try again.
- */
- txn->status = 0;
- msg->msg_state = HTTP_MSG_RQBEFORE;
- req->analysers &= AN_REQ_FLT_END;
- s->logs.logwait = 0;
- s->logs.level = 0;
- s->res.flags &= ~CF_EXPECT_MORE; /* speed up sending a previous response */
- http_reply_and_close(s, txn->status, NULL);
- return 0;
- }
-
- /* OK now we have a complete HTTP request with indexed headers. Let's
- * complete the request parsing by setting a few fields we will need
- * later. At this point, we have the last CRLF at req->buf.data + msg->eoh.
- * If the request is in HTTP/0.9 form, the rule is still true, and eoh
- * points to the CRLF of the request line. msg->next points to the first
- * byte after the last LF. msg->sov points to the first byte of data.
- * msg->eol cannot be trusted because it may have been left uninitialized
- * (for instance in the absence of headers).
- */
-
- stream_inc_http_req_ctr(s);
- proxy_inc_fe_req_ctr(sess->fe); /* one more valid request for this FE */
-
- if (txn->flags & TX_WAIT_NEXT_RQ) {
- /* kill the pending keep-alive timeout */
- txn->flags &= ~TX_WAIT_NEXT_RQ;
- req->analyse_exp = TICK_ETERNITY;
- }
-
-
- /* Maybe we found in invalid header name while we were configured not
- * to block on that, so we have to capture it now.
- */
- if (unlikely(msg->err_pos >= 0))
- http_capture_bad_message(sess->fe, s, msg, msg->err_state, sess->fe);
-
- /*
- * 1: identify the method
- */
- txn->meth = find_http_meth(ci_head(req), msg->sl.rq.m_l);
-
- /* we can make use of server redirect on GET and HEAD */
- if (txn->meth == HTTP_METH_GET || txn->meth == HTTP_METH_HEAD)
- s->flags |= SF_REDIRECTABLE;
- else if (txn->meth == HTTP_METH_OTHER &&
- msg->sl.rq.m_l == 3 && memcmp(ci_head(req), "PRI", 3) == 0) {
- /* PRI is reserved for the HTTP/2 preface */
- msg->err_pos = 0;
- goto return_bad_req;
- }
-
- /*
- * 2: check if the URI matches the monitor_uri.
- * We have to do this for every request which gets in, because
- * the monitor-uri is defined by the frontend.
- */
- if (unlikely((sess->fe->monitor_uri_len != 0) &&
- (sess->fe->monitor_uri_len == msg->sl.rq.u_l) &&
- !memcmp(ci_head(req) + msg->sl.rq.u,
- sess->fe->monitor_uri,
- sess->fe->monitor_uri_len))) {
- /*
- * We have found the monitor URI
- */
- struct acl_cond *cond;
-
- s->flags |= SF_MONITOR;
- _HA_ATOMIC_ADD(&sess->fe->fe_counters.intercepted_req, 1);
-
- /* Check if we want to fail this monitor request or not */
- list_for_each_entry(cond, &sess->fe->mon_fail_cond, list) {
- int ret = acl_exec_cond(cond, sess->fe, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL);
-
- ret = acl_pass(ret);
- if (cond->pol == ACL_COND_UNLESS)
- ret = !ret;
-
- if (ret) {
- /* we fail this request, let's return 503 service unavail */
- txn->status = 503;
- http_reply_and_close(s, txn->status, http_error_message(s));
- if (!(s->flags & SF_ERR_MASK))
- s->flags |= SF_ERR_LOCAL; /* we don't want a real error here */
- goto return_prx_cond;
- }
- }
-
- /* nothing to fail, let's reply normally */
- txn->status = 200;
- http_reply_and_close(s, txn->status, http_error_message(s));
- if (!(s->flags & SF_ERR_MASK))
- s->flags |= SF_ERR_LOCAL; /* we don't want a real error here */
- goto return_prx_cond;
- }
-
- /*
- * 3: Maybe we have to copy the original REQURI for the logs ?
- * Note: we cannot log anymore if the request has been
- * classified as invalid.
- */
- if (unlikely(s->logs.logwait & LW_REQ)) {
- /* we have a complete HTTP request that we must log */
- if ((txn->uri = pool_alloc(pool_head_requri)) != NULL) {
- int urilen = msg->sl.rq.l;
-
- if (urilen >= global.tune.requri_len )
- urilen = global.tune.requri_len - 1;
- memcpy(txn->uri, ci_head(req), urilen);
- txn->uri[urilen] = 0;
-
- if (!(s->logs.logwait &= ~(LW_REQ|LW_INIT)))
- s->do_log(s);
- } else {
- ha_alert("HTTP logging : out of memory.\n");
- }
- }
-
- /* RFC7230#2.6 has enforced the format of the HTTP version string to be
- * exactly one digit "." one digit. This check may be disabled using
- * option accept-invalid-http-request.
- */
- if (!(sess->fe->options2 & PR_O2_REQBUG_OK)) {
- if (msg->sl.rq.v_l != 8) {
- msg->err_pos = msg->sl.rq.v;
- goto return_bad_req;
- }
-
- if (ci_head(req)[msg->sl.rq.v + 4] != '/' ||
- !isdigit((unsigned char)ci_head(req)[msg->sl.rq.v + 5]) ||
- ci_head(req)[msg->sl.rq.v + 6] != '.' ||
- !isdigit((unsigned char)ci_head(req)[msg->sl.rq.v + 7])) {
- msg->err_pos = msg->sl.rq.v + 4;
- goto return_bad_req;
- }
- }
- else {
- /* 4. We may have to convert HTTP/0.9 requests to HTTP/1.0 */
- if (unlikely(msg->sl.rq.v_l == 0) && !http_upgrade_v09_to_v10(txn))
- goto return_bad_req;
- }
-
- /* ... and check if the request is HTTP/1.1 or above */
- if ((msg->sl.rq.v_l == 8) &&
- ((ci_head(req)[msg->sl.rq.v + 5] > '1') ||
- ((ci_head(req)[msg->sl.rq.v + 5] == '1') &&
- (ci_head(req)[msg->sl.rq.v + 7] >= '1'))))
- msg->flags |= HTTP_MSGF_VER_11;
-
- /* "connection" has not been parsed yet */
- txn->flags &= ~(TX_HDR_CONN_PRS | TX_HDR_CONN_CLO | TX_HDR_CONN_KAL | TX_HDR_CONN_UPG);
-
- /* if the frontend has "option http-use-proxy-header", we'll check if
- * we have what looks like a proxied connection instead of a connection,
- * and in this case set the TX_USE_PX_CONN flag to use Proxy-connection.
- * Note that this is *not* RFC-compliant, however browsers and proxies
- * happen to do that despite being non-standard :-(
- * We consider that a request not beginning with either '/' or '*' is
- * a proxied connection, which covers both "scheme://location" and
- * CONNECT ip:port.
- */
- if ((sess->fe->options2 & PR_O2_USE_PXHDR) &&
- ci_head(req)[msg->sl.rq.u] != '/' && ci_head(req)[msg->sl.rq.u] != '*')
- txn->flags |= TX_USE_PX_CONN;
-
- /* transfer length unknown*/
- msg->flags &= ~HTTP_MSGF_XFER_LEN;
-
- /* 5: we may need to capture headers */
- if (unlikely((s->logs.logwait & LW_REQHDR) && s->req_cap))
- http_capture_headers(ci_head(req), &txn->hdr_idx,
- s->req_cap, sess->fe->req_cap);
-
- /* 6: determine the transfer-length according to RFC2616 #4.4, updated
- * by RFC7230#3.3.3 :
- *
- * The length of a message body is determined by one of the following
- * (in order of precedence):
- *
- * 1. Any response to a HEAD request and any response with a 1xx
- * (Informational), 204 (No Content), or 304 (Not Modified) status
- * code is always terminated by the first empty line after the
- * header fields, regardless of the header fields present in the
- * message, and thus cannot contain a message body.
- *
- * 2. Any 2xx (Successful) response to a CONNECT request implies that
- * the connection will become a tunnel immediately after the empty
- * line that concludes the header fields. A client MUST ignore any
- * Content-Length or Transfer-Encoding header fields received in
- * such a message.
- *
- * 3. If a Transfer-Encoding header field is present and the chunked
- * transfer coding (Section 4.1) is the final encoding, the message
- * body length is determined by reading and decoding the chunked
- * data until the transfer coding indicates the data is complete.
- *
- * If a Transfer-Encoding header field is present in a response and
- * the chunked transfer coding is not the final encoding, the
- * message body length is determined by reading the connection until
- * it is closed by the server. If a Transfer-Encoding header field
- * is present in a request and the chunked transfer coding is not
- * the final encoding, the message body length cannot be determined
- * reliably; the server MUST respond with the 400 (Bad Request)
- * status code and then close the connection.
- *
- * If a message is received with both a Transfer-Encoding and a
- * Content-Length header field, the Transfer-Encoding overrides the
- * Content-Length. Such a message might indicate an attempt to
- * perform request smuggling (Section 9.5) or response splitting
- * (Section 9.4) and ought to be handled as an error. A sender MUST
- * remove the received Content-Length field prior to forwarding such
- * a message downstream.
- *
- * 4. If a message is received without Transfer-Encoding and with
- * either multiple Content-Length header fields having differing
- * field-values or a single Content-Length header field having an
- * invalid value, then the message framing is invalid and the
- * recipient MUST treat it as an unrecoverable error. If this is a
- * request message, the server MUST respond with a 400 (Bad Request)
- * status code and then close the connection. If this is a response
- * message received by a proxy, the proxy MUST close the connection
- * to the server, discard the received response, and send a 502 (Bad
- * Gateway) response to the client. If this is a response message
- * received by a user agent, the user agent MUST close the
- * connection to the server and discard the received response.
- *
- * 5. If a valid Content-Length header field is present without
- * Transfer-Encoding, its decimal value defines the expected message
- * body length in octets. If the sender closes the connection or
- * the recipient times out before the indicated number of octets are
- * received, the recipient MUST consider the message to be
- * incomplete and close the connection.
- *
- * 6. If this is a request message and none of the above are true, then
- * the message body length is zero (no message body is present).
- *
- * 7. Otherwise, this is a response message without a declared message
- * body length, so the message body length is determined by the
- * number of octets received prior to the server closing the
- * connection.
- */
-
- ctx.idx = 0;
- /* set TE_CHNK and XFER_LEN only if "chunked" is seen last */
- while (http_find_header2("Transfer-Encoding", 17, ci_head(req), &txn->hdr_idx, &ctx)) {
- if (ctx.vlen == 7 && strncasecmp(ctx.line + ctx.val, "chunked", 7) == 0)
- msg->flags |= HTTP_MSGF_TE_CHNK;
- else if (msg->flags & HTTP_MSGF_TE_CHNK) {
- /* chunked not last, return badreq */
- goto return_bad_req;
- }
- }
-
- /* Chunked requests must have their content-length removed */
- ctx.idx = 0;
- if (msg->flags & HTTP_MSGF_TE_CHNK) {
- while (http_find_header2("Content-Length", 14, ci_head(req), &txn->hdr_idx, &ctx))
- http_remove_header2(msg, &txn->hdr_idx, &ctx);
- }
- else while (http_find_header2("Content-Length", 14, ci_head(req), &txn->hdr_idx, &ctx)) {
- signed long long cl;
-
- if (!ctx.vlen) {
- msg->err_pos = ctx.line + ctx.val - ci_head(req);
- goto return_bad_req;
- }
-
- if (strl2llrc(ctx.line + ctx.val, ctx.vlen, &cl)) {
- msg->err_pos = ctx.line + ctx.val - ci_head(req);
- goto return_bad_req; /* parse failure */
- }
-
- if (cl < 0) {
- msg->err_pos = ctx.line + ctx.val - ci_head(req);
- goto return_bad_req;
- }
-
- if ((msg->flags & HTTP_MSGF_CNT_LEN) && (msg->chunk_len != cl)) {
- msg->err_pos = ctx.line + ctx.val - ci_head(req);
- goto return_bad_req; /* already specified, was different */
- }
-
- msg->flags |= HTTP_MSGF_CNT_LEN;
- msg->body_len = msg->chunk_len = cl;
- }
-
- /* even bodyless requests have a known length */
- msg->flags |= HTTP_MSGF_XFER_LEN;
-
- /* Until set to anything else, the connection mode is set as Keep-Alive. It will
- * only change if both the request and the config reference something else.
- * Option httpclose by itself sets tunnel mode where headers are mangled.
- * However, if another mode is set, it will affect it (eg: server-close/
- * keep-alive + httpclose = close). Note that we avoid to redo the same work
- * if FE and BE have the same settings (common). The method consists in
- * checking if options changed between the two calls (implying that either
- * one is non-null, or one of them is non-null and we are there for the first
- * time.
- */
- if (!(txn->flags & TX_HDR_CONN_PRS) ||
- ((sess->fe->options & PR_O_HTTP_MODE) != (s->be->options & PR_O_HTTP_MODE)))
- http_adjust_conn_mode(s, txn, msg);
-
- /* we may have to wait for the request's body */
- if ((s->be->options & PR_O_WREQ_BODY) &&
- (msg->body_len || (msg->flags & HTTP_MSGF_TE_CHNK)))
- req->analysers |= AN_REQ_HTTP_BODY;
-
- /*
- * RFC7234#4:
- * A cache MUST write through requests with methods
- * that are unsafe (Section 4.2.1 of [RFC7231]) to
- * the origin server; i.e., a cache is not allowed
- * to generate a reply to such a request before
- * having forwarded the request and having received
- * a corresponding response.
- *
- * RFC7231#4.2.1:
- * Of the request methods defined by this
- * specification, the GET, HEAD, OPTIONS, and TRACE
- * methods are defined to be safe.
- */
- if (likely(txn->meth == HTTP_METH_GET ||
- txn->meth == HTTP_METH_HEAD ||
- txn->meth == HTTP_METH_OPTIONS ||
- txn->meth == HTTP_METH_TRACE))
- txn->flags |= TX_CACHEABLE | TX_CACHE_COOK;
-
- /* end of job, return OK */
- req->analysers &= ~an_bit;
- req->analyse_exp = TICK_ETERNITY;
- return 1;
-
- return_bad_req:
- /* We centralize bad requests processing here */
- if (unlikely(msg->msg_state == HTTP_MSG_ERROR) || msg->err_pos >= 0) {
- /* we detected a parsing error. We want to archive this request
- * in the dedicated proxy area for later troubleshooting.
- */
- http_capture_bad_message(sess->fe, s, msg, msg->err_state, sess->fe);
- }
-
- txn->req.err_state = txn->req.msg_state;
- txn->req.msg_state = HTTP_MSG_ERROR;
- txn->status = 400;
- http_reply_and_close(s, txn->status, http_error_message(s));
-
- _HA_ATOMIC_ADD(&sess->fe->fe_counters.failed_req, 1);
- if (sess->listener->counters)
- _HA_ATOMIC_ADD(&sess->listener->counters->failed_req, 1);
-
- return_prx_cond:
- if (!(s->flags & SF_ERR_MASK))
- s->flags |= SF_ERR_PRXCOND;
- if (!(s->flags & SF_FINST_MASK))
- s->flags |= SF_FINST_R;
-
- req->analysers &= AN_REQ_FLT_END;
- req->analyse_exp = TICK_ETERNITY;
- return 0;
-}
-
-
-/* This function prepares an applet to handle the stats. It can deal with the
- * "100-continue" expectation, check that admin rules are met for POST requests,
- * and program a response message if something was unexpected. It cannot fail
- * and always relies on the stats applet to complete the job. It does not touch
- * analysers nor counters, which are left to the caller. It does not touch
- * s->target which is supposed to already point to the stats applet. The caller
- * is expected to have already assigned an appctx to the stream.
- */
-int http_handle_stats(struct stream *s, struct channel *req)
-{
- struct stats_admin_rule *stats_admin_rule;
- struct stream_interface *si = &s->si[1];
- struct session *sess = s->sess;
- struct http_txn *txn = s->txn;
- struct http_msg *msg = &txn->req;
- struct uri_auth *uri_auth = s->be->uri_auth;
- const char *uri, *h, *lookup;
- struct appctx *appctx;
-
- appctx = si_appctx(si);
- memset(&appctx->ctx.stats, 0, sizeof(appctx->ctx.stats));
- appctx->st1 = appctx->st2 = 0;
- appctx->ctx.stats.st_code = STAT_STATUS_INIT;
- appctx->ctx.stats.flags |= STAT_FMT_HTML; /* assume HTML mode by default */
- if ((msg->flags & HTTP_MSGF_VER_11) && (s->txn->meth != HTTP_METH_HEAD))
- appctx->ctx.stats.flags |= STAT_CHUNKED;
-
- uri = ci_head(msg->chn) + msg->sl.rq.u;
- lookup = uri + uri_auth->uri_len;
-
- for (h = lookup; h <= uri + msg->sl.rq.u_l - 3; h++) {
- if (memcmp(h, ";up", 3) == 0) {
- appctx->ctx.stats.flags |= STAT_HIDE_DOWN;
- break;
- }
- }
-
- if (uri_auth->refresh) {
- for (h = lookup; h <= uri + msg->sl.rq.u_l - 10; h++) {
- if (memcmp(h, ";norefresh", 10) == 0) {
- appctx->ctx.stats.flags |= STAT_NO_REFRESH;
- break;
- }
- }
- }
-
- for (h = lookup; h <= uri + msg->sl.rq.u_l - 4; h++) {
- if (memcmp(h, ";csv", 4) == 0) {
- appctx->ctx.stats.flags &= ~STAT_FMT_HTML;
- break;
- }
- }
-
- for (h = lookup; h <= uri + msg->sl.rq.u_l - 6; h++) {
- if (memcmp(h, ";typed", 6) == 0) {
- appctx->ctx.stats.flags &= ~STAT_FMT_HTML;
- appctx->ctx.stats.flags |= STAT_FMT_TYPED;
- break;
- }
- }
-
- for (h = lookup; h <= uri + msg->sl.rq.u_l - 8; h++) {
- if (memcmp(h, ";st=", 4) == 0) {
- int i;
- h += 4;
- appctx->ctx.stats.st_code = STAT_STATUS_UNKN;
- for (i = STAT_STATUS_INIT + 1; i < STAT_STATUS_SIZE; i++) {
- if (strncmp(stat_status_codes[i], h, 4) == 0) {
- appctx->ctx.stats.st_code = i;
- break;
- }
- }
- break;
- }
- }
-
- appctx->ctx.stats.scope_str = 0;
- appctx->ctx.stats.scope_len = 0;
- for (h = lookup; h <= uri + msg->sl.rq.u_l - 8; h++) {
- if (memcmp(h, STAT_SCOPE_INPUT_NAME "=", strlen(STAT_SCOPE_INPUT_NAME) + 1) == 0) {
- int itx = 0;
- const char *h2;
- char scope_txt[STAT_SCOPE_TXT_MAXLEN + 1];
- const char *err;
-
- h += strlen(STAT_SCOPE_INPUT_NAME) + 1;
- h2 = h;
- appctx->ctx.stats.scope_str = h2 - ci_head(msg->chn);
- while (*h != ';' && *h != '\0' && *h != '&' && *h != ' ' && *h != '\n') {
- itx++;
- h++;
- }
-
- if (itx > STAT_SCOPE_TXT_MAXLEN)
- itx = STAT_SCOPE_TXT_MAXLEN;
- appctx->ctx.stats.scope_len = itx;
-
- /* scope_txt = search query, appctx->ctx.stats.scope_len is always <= STAT_SCOPE_TXT_MAXLEN */
- memcpy(scope_txt, h2, itx);
- scope_txt[itx] = '\0';
- err = invalid_char(scope_txt);
- if (err) {
- /* bad char in search text => clear scope */
- appctx->ctx.stats.scope_str = 0;
- appctx->ctx.stats.scope_len = 0;
- }
- break;
- }
- }
-
- /* now check whether we have some admin rules for this request */
- list_for_each_entry(stats_admin_rule, &uri_auth->admin_rules, list) {
- int ret = 1;
-
- if (stats_admin_rule->cond) {
- ret = acl_exec_cond(stats_admin_rule->cond, s->be, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL);
- ret = acl_pass(ret);
- if (stats_admin_rule->cond->pol == ACL_COND_UNLESS)
- ret = !ret;
- }
-
- if (ret) {
- /* no rule, or the rule matches */
- appctx->ctx.stats.flags |= STAT_ADMIN;
- break;
- }
- }
-
- if (txn->meth == HTTP_METH_GET || txn->meth == HTTP_METH_HEAD)
- appctx->st0 = STAT_HTTP_HEAD;
- else if (txn->meth == HTTP_METH_POST && (msg->flags & HTTP_MSGF_CNT_LEN)) {
- if (appctx->ctx.stats.flags & STAT_ADMIN)
- appctx->st0 = STAT_HTTP_POST;
- else {
- /* POST without admin level */
- appctx->ctx.stats.flags &= ~STAT_CHUNKED;
- appctx->ctx.stats.st_code = STAT_STATUS_DENY;
- appctx->st0 = STAT_HTTP_LAST;
- }
- }
- else {
- /* Unsupported method or chunked POST */
- appctx->ctx.stats.flags &= ~STAT_CHUNKED;
- appctx->ctx.stats.st_code = STAT_STATUS_IVAL;
- appctx->st0 = STAT_HTTP_LAST;
- }
-
- s->task->nice = -32; /* small boost for HTTP statistics */
- return 1;
-}
-
-int http_transform_header_str(struct stream* s, struct http_msg *msg,
- const char* name, unsigned int name_len,
- const char *str, struct my_regex *re,
- int action)
-{
- struct hdr_idx *idx = &s->txn->hdr_idx;
- struct buffer *output = get_trash_chunk();
-
- /* Choose the header browsing function. */
- switch (action) {
- case ACT_HTTP_REPLACE_VAL:
- return http_legacy_replace_header(idx, msg, name, name_len, str, re, output);
- case ACT_HTTP_REPLACE_HDR:
- return http_legacy_replace_full_header(idx, msg, name, name_len, str, re, output);
- default: /* impossible */
- return -1;
- }
-}
-
-static int http_transform_header(struct stream* s, struct http_msg *msg,
- const char* name, unsigned int name_len,
- struct list *fmt, struct my_regex *re,
- int action)
-{
- struct buffer *replace;
- int ret = -1;
-
- replace = alloc_trash_chunk();
- if (!replace)
- goto leave;
-
- replace->data = build_logline(s, replace->area, replace->size, fmt);
- if (replace->data >= replace->size - 1)
- goto leave;
-
- ret = http_transform_header_str(s, msg, name, name_len, replace->area,
- re, action);
-
- leave:
- free_trash_chunk(replace);
- return ret;
-}
-
-/* Handle Expect: 100-continue for HTTP/1.1 messages if necessary. */
-static void http_handle_expect_hdr(struct stream *s, struct channel *req, struct http_msg *msg)
-{
- /* If we have HTTP/1.1 message with a body and Expect: 100-continue,
- * then we must send an HTTP/1.1 100 Continue intermediate response.
- */
- if (msg->msg_state == HTTP_MSG_BODY && (msg->flags & HTTP_MSGF_VER_11) &&
- (msg->flags & (HTTP_MSGF_CNT_LEN|HTTP_MSGF_TE_CHNK))) {
- struct hdr_ctx ctx;
- ctx.idx = 0;
- /* Expect is allowed in 1.1, look for it */
- if (http_find_header2("Expect", 6, ci_head(req), &s->txn->hdr_idx, &ctx) &&
- unlikely(ctx.vlen == 12 && strncasecmp(ctx.line+ctx.val, "100-continue", 12) == 0)) {
- co_inject(&s->res, HTTP_100.ptr, HTTP_100.len);
- http_remove_header2(&s->txn->req, &s->txn->hdr_idx, &ctx);
- }
- }
-}
-
-/*
- * Build an HTTP Early Hint HTTP 103 response header with <name> as name and with a value
- * built according to <fmt> log line format.
- * If <early_hints> is NULL, it is allocated and the HTTP 103 response first
- * line is inserted before the header. If an error occurred <early_hints> is
- * released and NULL is returned. On success the updated buffer is returned.
- */
-static struct buffer *http_apply_early_hint_rule(struct stream* s, struct buffer *early_hints,
- const char* name, unsigned int name_len,
- struct list *fmt)
-{
- if (!early_hints) {
- early_hints = alloc_trash_chunk();
- if (!early_hints)
- goto fail;
- if (!chunk_memcat(early_hints, HTTP_103.ptr, HTTP_103.len))
- goto fail;
- }
-
- if (!chunk_memcat(early_hints, name, name_len) || !chunk_memcat(early_hints, ": ", 2))
- goto fail;
-
- early_hints->data += build_logline(s, b_tail(early_hints), b_room(early_hints), fmt);
- if (!chunk_memcat(early_hints, "\r\n", 2))
- goto fail;
-
- return early_hints;
-
- fail:
- free_trash_chunk(early_hints);
- return NULL;
-}
-
-/* Sends an HTTP 103 response. Before sending it, the last CRLF finishing the
- * response is added. If an error occurred or if another response was already
- * sent, this function does nothing.
- */
-static void http_send_early_hints(struct stream *s, struct buffer *early_hints)
-{
- struct channel *chn = s->txn->rsp.chn;
- char *cur_ptr = ci_head(chn);
- int ret;
-
- /* If a response was already sent, skip early hints */
- if (s->txn->status > 0)
- return;
-
- if (!chunk_memcat(early_hints, "\r\n", 2))
- return;
-
- ret = b_rep_blk(&chn->buf, cur_ptr, cur_ptr, b_head(early_hints), b_data(early_hints));
- c_adv(chn, ret);
- chn->total += ret;
-}
-
-/* Executes the http-request rules <rules> for stream <s>, proxy <px> and
- * transaction <txn>. Returns the verdict of the first rule that prevents
- * further processing of the request (auth, deny, ...), and defaults to
- * HTTP_RULE_RES_STOP if it executed all rules or stopped on an allow, or
- * HTTP_RULE_RES_CONT if the last rule was reached. It may set the TX_CLTARPIT
- * on txn->flags if it encounters a tarpit rule. If <deny_status> is not NULL
- * and a deny/tarpit rule is matched, it will be filled with this rule's deny
- * status.
- */
-enum rule_result
-http_req_get_intercept_rule(struct proxy *px, struct list *rules, struct stream *s, int *deny_status)
-{
- struct session *sess = strm_sess(s);
- struct http_txn *txn = s->txn;
- struct act_rule *rule;
- struct hdr_ctx ctx;
- const char *auth_realm;
- struct buffer *early_hints = NULL;
- enum rule_result rule_ret = HTTP_RULE_RES_CONT;
- int act_flags = 0;
- int len;
-
- /* If "the current_rule_list" match the executed rule list, we are in
- * resume condition. If a resume is needed it is always in the action
- * and never in the ACL or converters. In this case, we initialise the
- * current rule, and go to the action execution point.
- */
- if (s->current_rule) {
- rule = s->current_rule;
- s->current_rule = NULL;
- if (s->current_rule_list == rules)
- goto resume_execution;
- }
- s->current_rule_list = rules;
-
- list_for_each_entry(rule, rules, list) {
-
- /* check optional condition */
- if (rule->cond) {
- int ret;
-
- ret = acl_exec_cond(rule->cond, px, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL);
- ret = acl_pass(ret);
-
- if (rule->cond->pol == ACL_COND_UNLESS)
- ret = !ret;
-
- if (!ret) /* condition not matched */
- continue;
- }
-
- act_flags |= ACT_FLAG_FIRST;
-resume_execution:
- switch (rule->action) {
- case ACT_ACTION_ALLOW:
- rule_ret = HTTP_RULE_RES_STOP;
- goto end;
-
- case ACT_ACTION_DENY:
- if (deny_status)
- *deny_status = rule->deny_status;
- rule_ret = HTTP_RULE_RES_DENY;
- goto end;
-
- case ACT_HTTP_REQ_TARPIT:
- txn->flags |= TX_CLTARPIT;
- if (deny_status)
- *deny_status = rule->deny_status;
- rule_ret = HTTP_RULE_RES_DENY;
- goto end;
-
- case ACT_HTTP_REQ_AUTH:
- /* Be sure to send any pending HTTP 103 response first */
- if (early_hints) {
- http_send_early_hints(s, early_hints);
- free_trash_chunk(early_hints);
- early_hints = NULL;
- }
- /* Auth might be performed on regular http-req rules as well as on stats */
- auth_realm = rule->arg.auth.realm;
- if (!auth_realm) {
- if (px->uri_auth && rules == &px->uri_auth->http_req_rules)
- auth_realm = STATS_DEFAULT_REALM;
- else
- auth_realm = px->id;
- }
- /* send 401/407 depending on whether we use a proxy or not. We still
- * count one error, because normal browsing won't significantly
- * increase the counter but brute force attempts will.
- */
- chunk_printf(&trash, (txn->flags & TX_USE_PX_CONN) ? HTTP_407_fmt : HTTP_401_fmt, auth_realm);
- txn->status = (txn->flags & TX_USE_PX_CONN) ? 407 : 401;
- http_reply_and_close(s, txn->status, &trash);
- stream_inc_http_err_ctr(s);
- rule_ret = HTTP_RULE_RES_ABRT;
- goto end;
-
- case ACT_HTTP_REDIR:
- /* Be sure to send any pending HTTP 103 response first */
- if (early_hints) {
- http_send_early_hints(s, early_hints);
- free_trash_chunk(early_hints);
- early_hints = NULL;
- }
- rule_ret = HTTP_RULE_RES_DONE;
- if (!http_apply_redirect_rule(rule->arg.redir, s, txn))
- rule_ret = HTTP_RULE_RES_BADREQ;
- goto end;
-
- case ACT_HTTP_SET_NICE:
- s->task->nice = rule->arg.nice;
- break;
-
- case ACT_HTTP_SET_TOS:
- conn_set_tos(objt_conn(sess->origin), rule->arg.tos);
- break;
-
- case ACT_HTTP_SET_MARK:
- conn_set_mark(objt_conn(sess->origin), rule->arg.mark);
- break;
-
- case ACT_HTTP_SET_LOGL:
- s->logs.level = rule->arg.loglevel;
- break;
-
- case ACT_HTTP_REPLACE_HDR:
- case ACT_HTTP_REPLACE_VAL:
- if (http_transform_header(s, &txn->req, rule->arg.hdr_add.name,
- rule->arg.hdr_add.name_len,
- &rule->arg.hdr_add.fmt,
- rule->arg.hdr_add.re, rule->action)) {
- rule_ret = HTTP_RULE_RES_BADREQ;
- goto end;
- }
- break;
-
- case ACT_HTTP_DEL_HDR:
- ctx.idx = 0;
- /* remove all occurrences of the header */
- while (http_find_header2(rule->arg.hdr_add.name, rule->arg.hdr_add.name_len,
- ci_head(txn->req.chn), &txn->hdr_idx, &ctx)) {
- http_remove_header2(&txn->req, &txn->hdr_idx, &ctx);
- }
- break;
-
- case ACT_HTTP_SET_HDR:
- case ACT_HTTP_ADD_HDR: {
- /* The scope of the trash buffer must be limited to this function. The
- * build_logline() function can execute a lot of other function which
- * can use the trash buffer. So for limiting the scope of this global
- * buffer, we build first the header value using build_logline, and
- * after we store the header name.
- */
- struct buffer *replace;
-
- replace = alloc_trash_chunk();
- if (!replace) {
- rule_ret = HTTP_RULE_RES_BADREQ;
- goto end;
- }
-
- len = rule->arg.hdr_add.name_len + 2,
- len += build_logline(s, replace->area + len,
- replace->size - len,
- &rule->arg.hdr_add.fmt);
- memcpy(replace->area, rule->arg.hdr_add.name,
- rule->arg.hdr_add.name_len);
- replace->area[rule->arg.hdr_add.name_len] = ':';
- replace->area[rule->arg.hdr_add.name_len + 1] = ' ';
- replace->data = len;
-
- if (rule->action == ACT_HTTP_SET_HDR) {
- /* remove all occurrences of the header */
- ctx.idx = 0;
- while (http_find_header2(rule->arg.hdr_add.name, rule->arg.hdr_add.name_len,
- ci_head(txn->req.chn), &txn->hdr_idx, &ctx)) {
- http_remove_header2(&txn->req, &txn->hdr_idx, &ctx);
- }
- }
-
- if (http_header_add_tail2(&txn->req, &txn->hdr_idx, replace->area, replace->data) < 0) {
- static unsigned char rate_limit = 0;
-
- if ((rate_limit++ & 255) == 0) {
- replace->area[rule->arg.hdr_add.name_len] = 0;
- send_log(px, LOG_WARNING, "Proxy %s failed to add or set the request header '%s' for request #%u. You might need to increase tune.maxrewrite.", px->id,
- replace->area, s->uniq_id);
- }
-
- _HA_ATOMIC_ADD(&sess->fe->fe_counters.failed_rewrites, 1);
- if (sess->fe != s->be)
- _HA_ATOMIC_ADD(&s->be->be_counters.failed_rewrites, 1);
- if (sess->listener->counters)
- _HA_ATOMIC_ADD(&sess->listener->counters->failed_rewrites, 1);
- }
-
- free_trash_chunk(replace);
- break;
- }
-
- case ACT_HTTP_DEL_ACL:
- case ACT_HTTP_DEL_MAP: {
- struct pat_ref *ref;
- struct buffer *key;
-
- /* collect reference */
- ref = pat_ref_lookup(rule->arg.map.ref);
- if (!ref)
- continue;
-
- /* allocate key */
- key = alloc_trash_chunk();
- if (!key) {
- rule_ret = HTTP_RULE_RES_BADREQ;
- goto end;
- }
-
- /* collect key */
- key->data = build_logline(s, key->area, key->size,
- &rule->arg.map.key);
- key->area[key->data] = '\0';
-
- /* perform update */
- /* returned code: 1=ok, 0=ko */
- HA_SPIN_LOCK(PATREF_LOCK, &ref->lock);
- pat_ref_delete(ref, key->area);
- HA_SPIN_UNLOCK(PATREF_LOCK, &ref->lock);
-
- free_trash_chunk(key);
- break;
- }
-
- case ACT_HTTP_ADD_ACL: {
- struct pat_ref *ref;
- struct buffer *key;
-
- /* collect reference */
- ref = pat_ref_lookup(rule->arg.map.ref);
- if (!ref)
- continue;
-
- /* allocate key */
- key = alloc_trash_chunk();
- if (!key) {
- rule_ret = HTTP_RULE_RES_BADREQ;
- goto end;
- }
-
- /* collect key */
- key->data = build_logline(s, key->area, key->size,
- &rule->arg.map.key);
- key->area[key->data] = '\0';
-
- /* perform update */
- /* add entry only if it does not already exist */
- HA_SPIN_LOCK(PATREF_LOCK, &ref->lock);
- if (pat_ref_find_elt(ref, key->area) == NULL)
- pat_ref_add(ref, key->area, NULL, NULL);
- HA_SPIN_UNLOCK(PATREF_LOCK, &ref->lock);
-
- free_trash_chunk(key);
- break;
- }
-
- case ACT_HTTP_SET_MAP: {
- struct pat_ref *ref;
- struct buffer *key, *value;
-
- /* collect reference */
- ref = pat_ref_lookup(rule->arg.map.ref);
- if (!ref)
- continue;
-
- /* allocate key */
- key = alloc_trash_chunk();
- if (!key) {
- rule_ret = HTTP_RULE_RES_BADREQ;
- goto end;
- }
-
- /* allocate value */
- value = alloc_trash_chunk();
- if (!value) {
- free_trash_chunk(key);
- rule_ret = HTTP_RULE_RES_BADREQ;
- goto end;
- }
-
- /* collect key */
- key->data = build_logline(s, key->area, key->size,
- &rule->arg.map.key);
- key->area[key->data] = '\0';
-
- /* collect value */
- value->data = build_logline(s, value->area,
- value->size,
- &rule->arg.map.value);
- value->area[value->data] = '\0';
-
- /* perform update */
- HA_SPIN_LOCK(PATREF_LOCK, &ref->lock);
- if (pat_ref_find_elt(ref, key->area) != NULL)
- /* update entry if it exists */
- pat_ref_set(ref, key->area, value->area, NULL);
- else
- /* insert a new entry */
- pat_ref_add(ref, key->area, value->area, NULL);
- HA_SPIN_UNLOCK(PATREF_LOCK, &ref->lock);
-
- free_trash_chunk(key);
- free_trash_chunk(value);
- break;
- }
-
- case ACT_HTTP_EARLY_HINT:
- if (!(txn->req.flags & HTTP_MSGF_VER_11))
- break;
- early_hints = http_apply_early_hint_rule(s, early_hints,
- rule->arg.early_hint.name,
- rule->arg.early_hint.name_len,
- &rule->arg.early_hint.fmt);
- if (!early_hints) {
- rule_ret = HTTP_RULE_RES_DONE;
- goto end;
- }
- break;
- case ACT_CUSTOM:
- if ((s->req.flags & CF_READ_ERROR) ||
- ((s->req.flags & (CF_SHUTR|CF_READ_NULL)) &&
- (px->options & PR_O_ABRT_CLOSE)))
- act_flags |= ACT_FLAG_FINAL;
-
- switch (rule->action_ptr(rule, px, s->sess, s, act_flags)) {
- case ACT_RET_ERR:
- case ACT_RET_CONT:
- break;
- case ACT_RET_STOP:
- rule_ret = HTTP_RULE_RES_STOP;
- goto end;
- case ACT_RET_DONE:
- rule_ret = HTTP_RULE_RES_DONE;
- goto end;
- case ACT_RET_YIELD:
- s->current_rule = rule;
- rule_ret = HTTP_RULE_RES_YIELD;
- goto end;
- }
- break;
-
- case ACT_ACTION_TRK_SC0 ... ACT_ACTION_TRK_SCMAX:
- /* Note: only the first valid tracking parameter of each
- * applies.
- */
-
- if (stkctr_entry(&s->stkctr[trk_idx(rule->action)]) == NULL) {
- struct stktable *t;
- struct stksess *ts;
- struct stktable_key *key;
- void *ptr1, *ptr2;
-
- t = rule->arg.trk_ctr.table.t;
- key = stktable_fetch_key(t, s->be, sess, s, SMP_OPT_DIR_REQ | SMP_OPT_FINAL, rule->arg.trk_ctr.expr, NULL);
-
- if (key && (ts = stktable_get_entry(t, key))) {
- stream_track_stkctr(&s->stkctr[trk_idx(rule->action)], t, ts);
-
- /* let's count a new HTTP request as it's the first time we do it */
- ptr1 = stktable_data_ptr(t, ts, STKTABLE_DT_HTTP_REQ_CNT);
- ptr2 = stktable_data_ptr(t, ts, STKTABLE_DT_HTTP_REQ_RATE);
- if (ptr1 || ptr2) {
- HA_RWLOCK_WRLOCK(STK_SESS_LOCK, &ts->lock);
-
- if (ptr1)
- stktable_data_cast(ptr1, http_req_cnt)++;
-
- if (ptr2)
- update_freq_ctr_period(&stktable_data_cast(ptr2, http_req_rate),
- t->data_arg[STKTABLE_DT_HTTP_REQ_RATE].u, 1);
-
- HA_RWLOCK_WRUNLOCK(STK_SESS_LOCK, &ts->lock);
-
- /* If data was modified, we need to touch to re-schedule sync */
- stktable_touch_local(t, ts, 0);
- }
-
- stkctr_set_flags(&s->stkctr[trk_idx(rule->action)], STKCTR_TRACK_CONTENT);
- if (sess->fe != s->be)
- stkctr_set_flags(&s->stkctr[trk_idx(rule->action)], STKCTR_TRACK_BACKEND);
- }
- }
- break;
-
- /* other flags exists, but normally, they never be matched. */
- default:
- break;
- }
- }
-
- end:
- if (early_hints) {
- http_send_early_hints(s, early_hints);
- free_trash_chunk(early_hints);
- }
-
- /* we reached the end of the rules, nothing to report */
- return rule_ret;
-}
-
-
-/* Executes the http-response rules <rules> for stream <s> and proxy <px>. It
- * returns one of 5 possible statuses: HTTP_RULE_RES_CONT, HTTP_RULE_RES_STOP,
- * HTTP_RULE_RES_DONE, HTTP_RULE_RES_YIELD, or HTTP_RULE_RES_BADREQ. If *CONT
- * is returned, the process can continue the evaluation of next rule list. If
- * *STOP or *DONE is returned, the process must stop the evaluation. If *BADREQ
- * is returned, it means the operation could not be processed and a server error
- * must be returned. It may set the TX_SVDENY on txn->flags if it encounters a
- * deny rule. If *YIELD is returned, the caller must call again the function
- * with the same context.
- */
-enum rule_result
-http_res_get_intercept_rule(struct proxy *px, struct list *rules, struct stream *s)
-{
- struct session *sess = strm_sess(s);
- struct http_txn *txn = s->txn;
- struct act_rule *rule;
- struct hdr_ctx ctx;
- enum rule_result rule_ret = HTTP_RULE_RES_CONT;
- int act_flags = 0;
-
- /* If "the current_rule_list" match the executed rule list, we are in
- * resume condition. If a resume is needed it is always in the action
- * and never in the ACL or converters. In this case, we initialise the
- * current rule, and go to the action execution point.
- */
- if (s->current_rule) {
- rule = s->current_rule;
- s->current_rule = NULL;
- if (s->current_rule_list == rules)
- goto resume_execution;
- }
- s->current_rule_list = rules;
-
- list_for_each_entry(rule, rules, list) {
-
- /* check optional condition */
- if (rule->cond) {
- int ret;
-
- ret = acl_exec_cond(rule->cond, px, sess, s, SMP_OPT_DIR_RES|SMP_OPT_FINAL);
- ret = acl_pass(ret);
-
- if (rule->cond->pol == ACL_COND_UNLESS)
- ret = !ret;
-
- if (!ret) /* condition not matched */
- continue;
- }
-
- act_flags |= ACT_FLAG_FIRST;
-resume_execution:
- switch (rule->action) {
- case ACT_ACTION_ALLOW:
- rule_ret = HTTP_RULE_RES_STOP; /* "allow" rules are OK */
- goto end;
-
- case ACT_ACTION_DENY:
- txn->flags |= TX_SVDENY;
- rule_ret = HTTP_RULE_RES_STOP;
- goto end;
-
- case ACT_HTTP_SET_NICE:
- s->task->nice = rule->arg.nice;
- break;
-
- case ACT_HTTP_SET_TOS:
- conn_set_tos(objt_conn(sess->origin), rule->arg.tos);
- break;
-
- case ACT_HTTP_SET_MARK:
- conn_set_mark(objt_conn(sess->origin), rule->arg.mark);
- break;
-
- case ACT_HTTP_SET_LOGL:
- s->logs.level = rule->arg.loglevel;
- break;
-
- case ACT_HTTP_REPLACE_HDR:
- case ACT_HTTP_REPLACE_VAL:
- if (http_transform_header(s, &txn->rsp, rule->arg.hdr_add.name,
- rule->arg.hdr_add.name_len,
- &rule->arg.hdr_add.fmt,
- rule->arg.hdr_add.re, rule->action)) {
- rule_ret = HTTP_RULE_RES_BADREQ;
- goto end;
- }
- break;
-
- case ACT_HTTP_DEL_HDR:
- ctx.idx = 0;
- /* remove all occurrences of the header */
- while (http_find_header2(rule->arg.hdr_add.name, rule->arg.hdr_add.name_len,
- ci_head(txn->rsp.chn), &txn->hdr_idx, &ctx)) {
- http_remove_header2(&txn->rsp, &txn->hdr_idx, &ctx);
- }
- break;
-
- case ACT_HTTP_SET_HDR:
- case ACT_HTTP_ADD_HDR: {
- struct buffer *replace;
-
- replace = alloc_trash_chunk();
- if (!replace) {
- rule_ret = HTTP_RULE_RES_BADREQ;
- goto end;
- }
-
- chunk_printf(replace, "%s: ", rule->arg.hdr_add.name);
- memcpy(replace->area, rule->arg.hdr_add.name,
- rule->arg.hdr_add.name_len);
- replace->data = rule->arg.hdr_add.name_len;
- replace->area[replace->data++] = ':';
- replace->area[replace->data++] = ' ';
- replace->data += build_logline(s,
- replace->area + replace->data,
- replace->size - replace->data,
- &rule->arg.hdr_add.fmt);
-
- if (rule->action == ACT_HTTP_SET_HDR) {
- /* remove all occurrences of the header */
- ctx.idx = 0;
- while (http_find_header2(rule->arg.hdr_add.name, rule->arg.hdr_add.name_len,
- ci_head(txn->rsp.chn), &txn->hdr_idx, &ctx)) {
- http_remove_header2(&txn->rsp, &txn->hdr_idx, &ctx);
- }
- }
-
- if (http_header_add_tail2(&txn->rsp, &txn->hdr_idx, replace->area, replace->data) < 0) {
- static unsigned char rate_limit = 0;
-
- if ((rate_limit++ & 255) == 0) {
- replace->area[rule->arg.hdr_add.name_len] = 0;
- send_log(px, LOG_WARNING, "Proxy %s failed to add or set the response header '%s' for request #%u. You might need to increase tune.maxrewrite.", px->id,
- replace->area, s->uniq_id);
- }
-
- _HA_ATOMIC_ADD(&sess->fe->fe_counters.failed_rewrites, 1);
- if (sess->fe != s->be)
- _HA_ATOMIC_ADD(&s->be->be_counters.failed_rewrites, 1);
- if (sess->listener->counters)
- _HA_ATOMIC_ADD(&sess->listener->counters->failed_rewrites, 1);
- if (objt_server(s->target))
- _HA_ATOMIC_ADD(&objt_server(s->target)->counters.failed_rewrites, 1);
- }
-
- free_trash_chunk(replace);
- break;
- }
-
- case ACT_HTTP_DEL_ACL:
- case ACT_HTTP_DEL_MAP: {
- struct pat_ref *ref;
- struct buffer *key;
-
- /* collect reference */
- ref = pat_ref_lookup(rule->arg.map.ref);
- if (!ref)
- continue;
-
- /* allocate key */
- key = alloc_trash_chunk();
- if (!key) {
- rule_ret = HTTP_RULE_RES_BADREQ;
- goto end;
- }
-
- /* collect key */
- key->data = build_logline(s, key->area, key->size,
- &rule->arg.map.key);
- key->area[key->data] = '\0';
-
- /* perform update */
- /* returned code: 1=ok, 0=ko */
- HA_SPIN_LOCK(PATREF_LOCK, &ref->lock);
- pat_ref_delete(ref, key->area);
- HA_SPIN_UNLOCK(PATREF_LOCK, &ref->lock);
-
- free_trash_chunk(key);
- break;
- }
-
- case ACT_HTTP_ADD_ACL: {
- struct pat_ref *ref;
- struct buffer *key;
-
- /* collect reference */
- ref = pat_ref_lookup(rule->arg.map.ref);
- if (!ref)
- continue;
-
- /* allocate key */
- key = alloc_trash_chunk();
- if (!key) {
- rule_ret = HTTP_RULE_RES_BADREQ;
- goto end;
- }
-
- /* collect key */
- key->data = build_logline(s, key->area, key->size,
- &rule->arg.map.key);
- key->area[key->data] = '\0';
-
- /* perform update */
- /* check if the entry already exists */
- HA_SPIN_LOCK(PATREF_LOCK, &ref->lock);
- if (pat_ref_find_elt(ref, key->area) == NULL)
- pat_ref_add(ref, key->area, NULL, NULL);
- HA_SPIN_UNLOCK(PATREF_LOCK, &ref->lock);
-
- free_trash_chunk(key);
- break;
- }
-
- case ACT_HTTP_SET_MAP: {
- struct pat_ref *ref;
- struct buffer *key, *value;
-
- /* collect reference */
- ref = pat_ref_lookup(rule->arg.map.ref);
- if (!ref)
- continue;
-
- /* allocate key */
- key = alloc_trash_chunk();
- if (!key) {
- rule_ret = HTTP_RULE_RES_BADREQ;
- goto end;
- }
-
- /* allocate value */
- value = alloc_trash_chunk();
- if (!value) {
- free_trash_chunk(key);
- rule_ret = HTTP_RULE_RES_BADREQ;
- goto end;
- }
-
- /* collect key */
- key->data = build_logline(s, key->area, key->size,
- &rule->arg.map.key);
- key->area[key->data] = '\0';
-
- /* collect value */
- value->data = build_logline(s, value->area,
- value->size,
- &rule->arg.map.value);
- value->area[value->data] = '\0';
-
- /* perform update */
- HA_SPIN_LOCK(PATREF_LOCK, &ref->lock);
- if (pat_ref_find_elt(ref, key->area) != NULL)
- /* update entry if it exists */
- pat_ref_set(ref, key->area, value->area, NULL);
- else
- /* insert a new entry */
- pat_ref_add(ref, key->area, value->area, NULL);
- HA_SPIN_UNLOCK(PATREF_LOCK, &ref->lock);
- free_trash_chunk(key);
- free_trash_chunk(value);
- break;
- }
-
- case ACT_HTTP_REDIR:
- rule_ret = HTTP_RULE_RES_DONE;
- if (!http_apply_redirect_rule(rule->arg.redir, s, txn))
- rule_ret = HTTP_RULE_RES_BADREQ;
- goto end;
-
- case ACT_ACTION_TRK_SC0 ... ACT_ACTION_TRK_SCMAX:
- /* Note: only the first valid tracking parameter of each
- * applies.
- */
-
- if (stkctr_entry(&s->stkctr[trk_idx(rule->action)]) == NULL) {
- struct stktable *t;
- struct stksess *ts;
- struct stktable_key *key;
- void *ptr;
-
- t = rule->arg.trk_ctr.table.t;
- key = stktable_fetch_key(t, s->be, sess, s, SMP_OPT_DIR_RES | SMP_OPT_FINAL, rule->arg.trk_ctr.expr, NULL);
-
- if (key && (ts = stktable_get_entry(t, key))) {
- stream_track_stkctr(&s->stkctr[trk_idx(rule->action)], t, ts);
-
- HA_RWLOCK_WRLOCK(STK_SESS_LOCK, &ts->lock);
-
- /* let's count a new HTTP request as it's the first time we do it */
- ptr = stktable_data_ptr(t, ts, STKTABLE_DT_HTTP_REQ_CNT);
- if (ptr)
- stktable_data_cast(ptr, http_req_cnt)++;
-
- ptr = stktable_data_ptr(t, ts, STKTABLE_DT_HTTP_REQ_RATE);
- if (ptr)
- update_freq_ctr_period(&stktable_data_cast(ptr, http_req_rate),
- t->data_arg[STKTABLE_DT_HTTP_REQ_RATE].u, 1);
-
- /* When the client triggers a 4xx from the server, it's most often due
- * to a missing object or permission. These events should be tracked
- * because if they happen often, it may indicate a brute force or a
- * vulnerability scan. Normally this is done when receiving the response
- * but here we're tracking after this ought to have been done so we have
- * to do it on purpose.
- */
- if ((unsigned)(txn->status - 400) < 100) {
- ptr = stktable_data_ptr(t, ts, STKTABLE_DT_HTTP_ERR_CNT);
- if (ptr)
- stktable_data_cast(ptr, http_err_cnt)++;
-
- ptr = stktable_data_ptr(t, ts, STKTABLE_DT_HTTP_ERR_RATE);
- if (ptr)
- update_freq_ctr_period(&stktable_data_cast(ptr, http_err_rate),
- t->data_arg[STKTABLE_DT_HTTP_ERR_RATE].u, 1);
- }
-
- HA_RWLOCK_WRUNLOCK(STK_SESS_LOCK, &ts->lock);
-
- /* If data was modified, we need to touch to re-schedule sync */
- stktable_touch_local(t, ts, 0);
-
- stkctr_set_flags(&s->stkctr[trk_idx(rule->action)], STKCTR_TRACK_CONTENT);
- if (sess->fe != s->be)
- stkctr_set_flags(&s->stkctr[trk_idx(rule->action)], STKCTR_TRACK_BACKEND);
-
- }
- }
- break;
-
- case ACT_CUSTOM:
- if ((s->req.flags & CF_READ_ERROR) ||
- ((s->req.flags & (CF_SHUTR|CF_READ_NULL)) &&
- (px->options & PR_O_ABRT_CLOSE)))
- act_flags |= ACT_FLAG_FINAL;
-
- switch (rule->action_ptr(rule, px, s->sess, s, act_flags)) {
- case ACT_RET_ERR:
- case ACT_RET_CONT:
- break;
- case ACT_RET_STOP:
- rule_ret = HTTP_RULE_RES_STOP;
- goto end;
- case ACT_RET_DONE:
- rule_ret = HTTP_RULE_RES_DONE;
- goto end;
- case ACT_RET_YIELD:
- s->current_rule = rule;
- rule_ret = HTTP_RULE_RES_YIELD;
- goto end;
- }
- break;
-
- /* other flags exists, but normally, they never be matched. */
- default:
- break;
- }
- }
-
- end:
- /* we reached the end of the rules, nothing to report */
- return rule_ret;
-}
-
-
-/* Perform an HTTP redirect based on the information in <rule>. The function
- * returns non-zero on success, or zero in case of a, irrecoverable error such
- * as too large a request to build a valid response.
- */
-int http_apply_redirect_rule(struct redirect_rule *rule, struct stream *s, struct http_txn *txn)
-{
- struct http_msg *req = &txn->req;
- struct http_msg *res = &txn->rsp;
- const char *msg_fmt;
- struct buffer *chunk;
- int ret = 0;
-
- if (IS_HTX_STRM(s))
- return htx_apply_redirect_rule(rule, s, txn);
-
- chunk = alloc_trash_chunk();
- if (!chunk)
- goto leave;
-
- /* build redirect message */
- switch(rule->code) {
- case 308:
- msg_fmt = HTTP_308;
- break;
- case 307:
- msg_fmt = HTTP_307;
- break;
- case 303:
- msg_fmt = HTTP_303;
- break;
- case 301:
- msg_fmt = HTTP_301;
- break;
- case 302:
- default:
- msg_fmt = HTTP_302;
- break;
- }
-
- if (unlikely(!chunk_strcpy(chunk, msg_fmt)))
- goto leave;
-
- switch(rule->type) {
- case REDIRECT_TYPE_SCHEME: {
- const char *path;
- const char *host;
- struct hdr_ctx ctx;
- int pathlen;
- int hostlen;
-
- host = "";
- hostlen = 0;
- ctx.idx = 0;
- if (http_find_header2("Host", 4, ci_head(req->chn), &txn->hdr_idx, &ctx)) {
- host = ctx.line + ctx.val;
- hostlen = ctx.vlen;
- }
-
- path = http_txn_get_path(txn);
- /* build message using path */
- if (path) {
- pathlen = req->sl.rq.u_l + (ci_head(req->chn) + req->sl.rq.u) - path;
- if (rule->flags & REDIRECT_FLAG_DROP_QS) {
- int qs = 0;
- while (qs < pathlen) {
- if (path[qs] == '?') {
- pathlen = qs;
- break;
- }
- qs++;
- }
- }
- } else {
- path = "/";
- pathlen = 1;
- }
-
- if (rule->rdr_str) { /* this is an old "redirect" rule */
- /* check if we can add scheme + "://" + host + path */
- if (chunk->data + rule->rdr_len + 3 + hostlen + pathlen > chunk->size - 4)
- goto leave;
-
- /* add scheme */
- memcpy(chunk->area + chunk->data, rule->rdr_str,
- rule->rdr_len);
- chunk->data += rule->rdr_len;
- }
- else {
- /* add scheme with executing log format */
- chunk->data += build_logline(s,
- chunk->area + chunk->data,
- chunk->size - chunk->data,
- &rule->rdr_fmt);
-
- /* check if we can add scheme + "://" + host + path */
- if (chunk->data + 3 + hostlen + pathlen > chunk->size - 4)
- goto leave;
- }
- /* add "://" */
- memcpy(chunk->area + chunk->data, "://", 3);
- chunk->data += 3;
-
- /* add host */
- memcpy(chunk->area + chunk->data, host, hostlen);
- chunk->data += hostlen;
-
- /* add path */
- memcpy(chunk->area + chunk->data, path, pathlen);
- chunk->data += pathlen;
-
- /* append a slash at the end of the location if needed and missing */
- if (chunk->data && chunk->area[chunk->data - 1] != '/' &&
- (rule->flags & REDIRECT_FLAG_APPEND_SLASH)) {
- if (chunk->data > chunk->size - 5)
- goto leave;
- chunk->area[chunk->data] = '/';
- chunk->data++;
- }
-
- break;
- }
- case REDIRECT_TYPE_PREFIX: {
- const char *path;
- int pathlen;
-
- path = http_txn_get_path(txn);
- /* build message using path */
- if (path) {
- pathlen = req->sl.rq.u_l + (ci_head(req->chn) + req->sl.rq.u) - path;
- if (rule->flags & REDIRECT_FLAG_DROP_QS) {
- int qs = 0;
- while (qs < pathlen) {
- if (path[qs] == '?') {
- pathlen = qs;
- break;
- }
- qs++;
- }
- }
- } else {
- path = "/";
- pathlen = 1;
- }
-
- if (rule->rdr_str) { /* this is an old "redirect" rule */
- if (chunk->data + rule->rdr_len + pathlen > chunk->size - 4)
- goto leave;
-
- /* add prefix. Note that if prefix == "/", we don't want to
- * add anything, otherwise it makes it hard for the user to
- * configure a self-redirection.
- */
- if (rule->rdr_len != 1 || *rule->rdr_str != '/') {
- memcpy(chunk->area + chunk->data,
- rule->rdr_str, rule->rdr_len);
- chunk->data += rule->rdr_len;
- }
- }
- else {
- /* add prefix with executing log format */
- chunk->data += build_logline(s,
- chunk->area + chunk->data,
- chunk->size - chunk->data,
- &rule->rdr_fmt);
-
- /* Check length */
- if (chunk->data + pathlen > chunk->size - 4)
- goto leave;
- }
-
- /* add path */
- memcpy(chunk->area + chunk->data, path, pathlen);
- chunk->data += pathlen;
-
- /* append a slash at the end of the location if needed and missing */
- if (chunk->data && chunk->area[chunk->data - 1] != '/' &&
- (rule->flags & REDIRECT_FLAG_APPEND_SLASH)) {
- if (chunk->data > chunk->size - 5)
- goto leave;
- chunk->area[chunk->data] = '/';
- chunk->data++;
- }
-
- break;
- }
- case REDIRECT_TYPE_LOCATION:
- default:
- if (rule->rdr_str) { /* this is an old "redirect" rule */
- if (chunk->data + rule->rdr_len > chunk->size - 4)
- goto leave;
-
- /* add location */
- memcpy(chunk->area + chunk->data, rule->rdr_str,
- rule->rdr_len);
- chunk->data += rule->rdr_len;
- }
- else {
- /* add location with executing log format */
- chunk->data += build_logline(s,
- chunk->area + chunk->data,
- chunk->size - chunk->data,
- &rule->rdr_fmt);
-
- /* Check left length */
- if (chunk->data > chunk->size - 4)
- goto leave;
- }
- break;
- }
-
- if (rule->cookie_len) {
- memcpy(chunk->area + chunk->data, "\r\nSet-Cookie: ", 14);
- chunk->data += 14;
- memcpy(chunk->area + chunk->data, rule->cookie_str,
- rule->cookie_len);
- chunk->data += rule->cookie_len;
- }
-
- /* add end of headers and the keep-alive/close status. */
- txn->status = rule->code;
- /* let's log the request time */
- s->logs.tv_request = now;
-
- if (((!(req->flags & HTTP_MSGF_TE_CHNK) && !req->body_len) || (req->msg_state == HTTP_MSG_DONE)) &&
- ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL ||
- (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_KAL)) {
- /* keep-alive possible */
- if (!(req->flags & HTTP_MSGF_VER_11)) {
- if (unlikely(txn->flags & TX_USE_PX_CONN)) {
- memcpy(chunk->area + chunk->data,
- "\r\nProxy-Connection: keep-alive", 30);
- chunk->data += 30;
- } else {
- memcpy(chunk->area + chunk->data,
- "\r\nConnection: keep-alive", 24);
- chunk->data += 24;
- }
- }
- memcpy(chunk->area + chunk->data, "\r\n\r\n", 4);
- chunk->data += 4;
- FLT_STRM_CB(s, flt_http_reply(s, txn->status, chunk));
- co_inject(res->chn, chunk->area, chunk->data);
- /* "eat" the request */
- b_del(&req->chn->buf, req->sov);
- req->next -= req->sov;
- req->sov = 0;
- s->req.analysers = AN_REQ_HTTP_XFER_BODY | (s->req.analysers & AN_REQ_FLT_END);
- s->res.analysers = AN_RES_HTTP_XFER_BODY | (s->res.analysers & AN_RES_FLT_END);
- req->msg_state = HTTP_MSG_CLOSED;
- res->msg_state = HTTP_MSG_DONE;
- /* Trim any possible response */
- b_set_data(&res->chn->buf, co_data(res->chn));
- res->next = res->sov = 0;
- /* let the server side turn to SI_ST_CLO */
- channel_shutw_now(req->chn);
- } else {
- /* keep-alive not possible */
- if (unlikely(txn->flags & TX_USE_PX_CONN)) {
- memcpy(chunk->area + chunk->data,
- "\r\nProxy-Connection: close\r\n\r\n", 29);
- chunk->data += 29;
- } else {
- memcpy(chunk->area + chunk->data,
- "\r\nConnection: close\r\n\r\n", 23);
- chunk->data += 23;
- }
- http_reply_and_close(s, txn->status, chunk);
- req->chn->analysers &= AN_REQ_FLT_END;
- }
-
- if (!(s->flags & SF_ERR_MASK))
- s->flags |= SF_ERR_LOCAL;
- if (!(s->flags & SF_FINST_MASK))
- s->flags |= SF_FINST_R;
-
- ret = 1;
- leave:
- free_trash_chunk(chunk);
- return ret;
-}
-
-/* This stream analyser runs all HTTP request processing which is common to
- * frontends and backends, which means blocking ACLs, filters, connection-close,
- * reqadd, stats and redirects. This is performed for the designated proxy.
- * It returns 1 if the processing can continue on next analysers, or zero if it
- * either needs more data or wants to immediately abort the request (eg: deny,
- * error, ...).
- */
-int http_process_req_common(struct stream *s, struct channel *req, int an_bit, struct proxy *px)
-{
- struct session *sess = s->sess;
- struct http_txn *txn = s->txn;
- struct http_msg *msg = &txn->req;
- struct redirect_rule *rule;
- struct cond_wordlist *wl;
- enum rule_result verdict;
- int deny_status = HTTP_ERR_403;
- struct connection *conn = objt_conn(sess->origin);
-
- if (IS_HTX_STRM(s))
- return htx_process_req_common(s, req, an_bit, px);
-
- if (unlikely(msg->msg_state < HTTP_MSG_BODY)) {
- /* we need more data */
- goto return_prx_yield;
- }
-
- DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%lu analysers=%02x\n",
- now_ms, __FUNCTION__,
- s,
- req,
- req->rex, req->wex,
- req->flags,
- ci_data(req),
- req->analysers);
-
- /* just in case we have some per-backend tracking. Only called the first
- * execution of the analyser. */
- if (!s->current_rule || s->current_rule_list != &px->http_req_rules)
- stream_inc_be_http_req_ctr(s);
-
- /* evaluate http-request rules */
- if (!LIST_ISEMPTY(&px->http_req_rules)) {
- verdict = http_req_get_intercept_rule(px, &px->http_req_rules, s, &deny_status);
-
- switch (verdict) {
- case HTTP_RULE_RES_YIELD: /* some data miss, call the function later. */
- goto return_prx_yield;
-
- case HTTP_RULE_RES_CONT:
- case HTTP_RULE_RES_STOP: /* nothing to do */
- break;
-
- case HTTP_RULE_RES_DENY: /* deny or tarpit */
- if (txn->flags & TX_CLTARPIT)
- goto tarpit;
- goto deny;
-
- case HTTP_RULE_RES_ABRT: /* abort request, response already sent. Eg: auth */
- goto return_prx_cond;
-
- case HTTP_RULE_RES_DONE: /* OK, but terminate request processing (eg: redirect) */
- goto done;
-
- case HTTP_RULE_RES_BADREQ: /* failed with a bad request */
- goto return_bad_req;
- }
- }
-
- if (conn && (conn->flags & CO_FL_EARLY_DATA) &&
- (conn->flags & (CO_FL_EARLY_SSL_HS | CO_FL_HANDSHAKE))) {
- struct hdr_ctx ctx;
-
- ctx.idx = 0;
- if (!http_find_header2("Early-Data", strlen("Early-Data"),
- ci_head(&s->req), &txn->hdr_idx, &ctx)) {
- if (unlikely(http_header_add_tail2(&txn->req,
- &txn->hdr_idx, "Early-Data: 1",
- strlen("Early-Data: 1")) < 0)) {
- goto return_bad_req;
- }
- }
-
- }
-
- /* OK at this stage, we know that the request was accepted according to
- * the http-request rules, we can check for the stats. Note that the
- * URI is detected *before* the req* rules in order not to be affected
- * by a possible reqrep, while they are processed *after* so that a
- * reqdeny can still block them. This clearly needs to change in 1.6!
- */
- if (!s->target && stats_check_uri(&s->si[1], txn, px)) {
- s->target = &http_stats_applet.obj_type;
- if (unlikely(!si_register_handler(&s->si[1], objt_applet(s->target)))) {
- txn->status = 500;
- s->logs.tv_request = now;
- http_reply_and_close(s, txn->status, http_error_message(s));
-
- if (!(s->flags & SF_ERR_MASK))
- s->flags |= SF_ERR_RESOURCE;
- goto return_prx_cond;
- }
-
- /* parse the whole stats request and extract the relevant information */
- http_handle_stats(s, req);
- verdict = http_req_get_intercept_rule(px, &px->uri_auth->http_req_rules, s, &deny_status);
- /* not all actions implemented: deny, allow, auth */
-
- if (verdict == HTTP_RULE_RES_DENY) /* stats http-request deny */
- goto deny;
-
- if (verdict == HTTP_RULE_RES_ABRT) /* stats auth / stats http-request auth */
- goto return_prx_cond;
- }
-
- /* evaluate the req* rules except reqadd */
- if (px->req_exp != NULL) {
- if (apply_filters_to_request(s, req, px) < 0)
- goto return_bad_req;
-
- if (txn->flags & TX_CLDENY)
- goto deny;
-
- if (txn->flags & TX_CLTARPIT) {
- deny_status = HTTP_ERR_500;
- goto tarpit;
- }
- }
-
- /* add request headers from the rule sets in the same order */
- list_for_each_entry(wl, &px->req_add, list) {
- if (wl->cond) {
- int ret = acl_exec_cond(wl->cond, px, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL);
- ret = acl_pass(ret);
- if (((struct acl_cond *)wl->cond)->pol == ACL_COND_UNLESS)
- ret = !ret;
- if (!ret)
- continue;
- }
-
- if (unlikely(http_header_add_tail2(&txn->req, &txn->hdr_idx, wl->s, strlen(wl->s)) < 0))
- goto return_bad_req;
- }
-
-
- /* Proceed with the stats now. */
- if (unlikely(objt_applet(s->target))) {
- /* process the stats request now */
- if (sess->fe == s->be) /* report it if the request was intercepted by the frontend */
- _HA_ATOMIC_ADD(&sess->fe->fe_counters.intercepted_req, 1);
-
- http_handle_expect_hdr(s, req, msg);
-
- if (!(s->flags & SF_ERR_MASK)) // this is not really an error but it is
- s->flags |= SF_ERR_LOCAL; // to mark that it comes from the proxy
- if (!(s->flags & SF_FINST_MASK))
- s->flags |= SF_FINST_R;
-
- /* enable the minimally required analyzers to handle keep-alive and compression on the HTTP response */
- req->analysers &= (AN_REQ_HTTP_BODY | AN_REQ_FLT_HTTP_HDRS | AN_REQ_FLT_END);
- req->analysers &= ~AN_REQ_FLT_XFER_DATA;
- req->analysers |= AN_REQ_HTTP_XFER_BODY;
-
- req->flags |= CF_SEND_DONTWAIT;
- s->flags |= SF_ASSIGNED;
- goto done;
- }
-
- /* check whether we have some ACLs set to redirect this request */
- list_for_each_entry(rule, &px->redirect_rules, list) {
- if (rule->cond) {
- int ret;
-
- ret = acl_exec_cond(rule->cond, px, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL);
- ret = acl_pass(ret);
- if (rule->cond->pol == ACL_COND_UNLESS)
- ret = !ret;
- if (!ret)
- continue;
- }
- if (!http_apply_redirect_rule(rule, s, txn))
- goto return_bad_req;
- goto done;
- }
-
- /* POST requests may be accompanied with an "Expect: 100-Continue" header.
- * If this happens, then the data will not come immediately, so we must
- * send all what we have without waiting. Note that due to the small gain
- * in waiting for the body of the request, it's easier to simply put the
- * CF_SEND_DONTWAIT flag any time. It's a one-shot flag so it will remove
- * itself once used.
- */
- req->flags |= CF_SEND_DONTWAIT;
-
- done: /* done with this analyser, continue with next ones that the calling
- * points will have set, if any.
- */
- req->analyse_exp = TICK_ETERNITY;
- done_without_exp: /* done with this analyser, but dont reset the analyse_exp. */
- req->analysers &= ~an_bit;
- return 1;
-
- tarpit:
- /* Allow cookie logging
- */
- if (s->be->cookie_name || sess->fe->capture_name)
- manage_client_side_cookies(s, req);
-
- /* When a connection is tarpitted, we use the tarpit timeout,
- * which may be the same as the connect timeout if unspecified.
- * If unset, then set it to zero because we really want it to
- * eventually expire. We build the tarpit as an analyser.
- */
- channel_erase(&s->req);
-
- /* wipe the request out so that we can drop the connection early
- * if the client closes first.
- */
- channel_dont_connect(req);
-
- txn->status = http_err_codes[deny_status];
-
- req->analysers &= AN_REQ_FLT_END; /* remove switching rules etc... */
- req->analysers |= AN_REQ_HTTP_TARPIT;
- req->analyse_exp = tick_add_ifset(now_ms, s->be->timeout.tarpit);
- if (!req->analyse_exp)
- req->analyse_exp = tick_add(now_ms, 0);
- stream_inc_http_err_ctr(s);
- _HA_ATOMIC_ADD(&sess->fe->fe_counters.denied_req, 1);
- if (sess->fe != s->be)
- _HA_ATOMIC_ADD(&s->be->be_counters.denied_req, 1);
- if (sess->listener->counters)
- _HA_ATOMIC_ADD(&sess->listener->counters->denied_req, 1);
- goto done_without_exp;
-
- deny: /* this request was blocked (denied) */
-
- /* Allow cookie logging
- */
- if (s->be->cookie_name || sess->fe->capture_name)
- manage_client_side_cookies(s, req);
-
- txn->flags |= TX_CLDENY;
- txn->status = http_err_codes[deny_status];
- s->logs.tv_request = now;
- http_reply_and_close(s, txn->status, http_error_message(s));
- stream_inc_http_err_ctr(s);
- _HA_ATOMIC_ADD(&sess->fe->fe_counters.denied_req, 1);
- if (sess->fe != s->be)
- _HA_ATOMIC_ADD(&s->be->be_counters.denied_req, 1);
- if (sess->listener->counters)
- _HA_ATOMIC_ADD(&sess->listener->counters->denied_req, 1);
- goto return_prx_cond;
-
- return_bad_req:
- /* We centralize bad requests processing here */
- if (unlikely(msg->msg_state == HTTP_MSG_ERROR) || msg->err_pos >= 0) {
- /* we detected a parsing error. We want to archive this request
- * in the dedicated proxy area for later troubleshooting.
- */
- http_capture_bad_message(sess->fe, s, msg, msg->err_state, sess->fe);
- }
-
- txn->req.err_state = txn->req.msg_state;
- txn->req.msg_state = HTTP_MSG_ERROR;
- txn->status = 400;
- http_reply_and_close(s, txn->status, http_error_message(s));
-
- _HA_ATOMIC_ADD(&sess->fe->fe_counters.failed_req, 1);
- if (sess->listener->counters)
- _HA_ATOMIC_ADD(&sess->listener->counters->failed_req, 1);
-
- return_prx_cond:
- if (!(s->flags & SF_ERR_MASK))
- s->flags |= SF_ERR_PRXCOND;
- if (!(s->flags & SF_FINST_MASK))
- s->flags |= SF_FINST_R;
-
- req->analysers &= AN_REQ_FLT_END;
- req->analyse_exp = TICK_ETERNITY;
- return 0;
-
- return_prx_yield:
- channel_dont_connect(req);
- return 0;
-}
-
-/* This function performs all the processing enabled for the current request.
- * It returns 1 if the processing can continue on next analysers, or zero if it
- * needs more data, encounters an error, or wants to immediately abort the
- * request. It relies on buffers flags, and updates s->req.analysers.
- */
-int http_process_request(struct stream *s, struct channel *req, int an_bit)
-{
- struct session *sess = s->sess;
- struct http_txn *txn = s->txn;
- struct http_msg *msg = &txn->req;
- struct connection *cli_conn = objt_conn(strm_sess(s)->origin);
-
- if (IS_HTX_STRM(s))
- return htx_process_request(s, req, an_bit);
-
- if (unlikely(msg->msg_state < HTTP_MSG_BODY)) {
- /* we need more data */
- channel_dont_connect(req);
- return 0;
- }
-
- DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%lu analysers=%02x\n",
- now_ms, __FUNCTION__,
- s,
- req,
- req->rex, req->wex,
- req->flags,
- ci_data(req),
- req->analysers);
-
- /*
- * Right now, we know that we have processed the entire headers
- * and that unwanted requests have been filtered out. We can do
- * whatever we want with the remaining request. Also, now we
- * may have separate values for ->fe, ->be.
- */
-
- /*
- * If HTTP PROXY is set we simply get remote server address parsing
- * incoming request. Note that this requires that a connection is
- * allocated on the server side.
- */
- if ((s->be->options & PR_O_HTTP_PROXY) && !(s->flags & SF_ADDR_SET)) {
- struct connection *conn;
- char *path;
-
- /* Note that for now we don't reuse existing proxy connections */
- if (unlikely((conn = cs_conn(si_alloc_cs(&s->si[1], NULL))) == NULL)) {
- txn->req.err_state = txn->req.msg_state;
- txn->req.msg_state = HTTP_MSG_ERROR;
- txn->status = 500;
- req->analysers &= AN_REQ_FLT_END;
- http_reply_and_close(s, txn->status, http_error_message(s));
-
- if (!(s->flags & SF_ERR_MASK))
- s->flags |= SF_ERR_RESOURCE;
- if (!(s->flags & SF_FINST_MASK))
- s->flags |= SF_FINST_R;
-
- return 0;
- }
-
- path = http_txn_get_path(txn);
- if (url2sa(ci_head(req) + msg->sl.rq.u,
- path ? path - (ci_head(req) + msg->sl.rq.u) : msg->sl.rq.u_l,
- &conn->addr.to, NULL) == -1)
- goto return_bad_req;
-
- /* if the path was found, we have to remove everything between
- * ci_head(req) + msg->sl.rq.u and path (excluded). If it was not
- * found, we need to replace from ci_head(req) + msg->sl.rq.u for
- * u_l characters by a single "/".
- */
- if (path) {
- char *cur_ptr = ci_head(req);
- char *cur_end = cur_ptr + txn->req.sl.rq.l;
- int delta;
-
- delta = b_rep_blk(&req->buf, cur_ptr + msg->sl.rq.u, path, NULL, 0);
- http_msg_move_end(&txn->req, delta);
- cur_end += delta;
- if (http_parse_reqline(&txn->req, HTTP_MSG_RQMETH, cur_ptr, cur_end + 1, NULL, NULL) == NULL)
- goto return_bad_req;
- }
- else {
- char *cur_ptr = ci_head(req);
- char *cur_end = cur_ptr + txn->req.sl.rq.l;
- int delta;
-
- delta = b_rep_blk(&req->buf, cur_ptr + msg->sl.rq.u,
- cur_ptr + msg->sl.rq.u + msg->sl.rq.u_l, "/", 1);
- http_msg_move_end(&txn->req, delta);
- cur_end += delta;
- if (http_parse_reqline(&txn->req, HTTP_MSG_RQMETH, cur_ptr, cur_end + 1, NULL, NULL) == NULL)
- goto return_bad_req;
- }
- conn->target = &s->be->obj_type;
- }
-
- /*
- * 7: Now we can work with the cookies.
- * Note that doing so might move headers in the request, but
- * the fields will stay coherent and the URI will not move.
- * This should only be performed in the backend.
- */
- if (s->be->cookie_name || sess->fe->capture_name)
- manage_client_side_cookies(s, req);
-
- /* add unique-id if "header-unique-id" is specified */
-
- if (!LIST_ISEMPTY(&sess->fe->format_unique_id) && !s->unique_id) {
- if ((s->unique_id = pool_alloc(pool_head_uniqueid)) == NULL)
- goto return_bad_req;
- s->unique_id[0] = '\0';
- build_logline(s, s->unique_id, UNIQUEID_LEN, &sess->fe->format_unique_id);
- }
-
- if (sess->fe->header_unique_id && s->unique_id) {
- if (chunk_printf(&trash, "%s: %s", sess->fe->header_unique_id, s->unique_id) < 0)
- goto return_bad_req;
- if (unlikely(http_header_add_tail2(&txn->req, &txn->hdr_idx, trash.area, trash.data) < 0))
- goto return_bad_req;
- }
-
- /*
- * 9: add X-Forwarded-For if either the frontend or the backend
- * asks for it.
- */
- if ((sess->fe->options | s->be->options) & PR_O_FWDFOR) {
- struct hdr_ctx ctx = { .idx = 0 };
- if (!((sess->fe->options | s->be->options) & PR_O_FF_ALWAYS) &&
- http_find_header2(s->be->fwdfor_hdr_len ? s->be->fwdfor_hdr_name : sess->fe->fwdfor_hdr_name,
- s->be->fwdfor_hdr_len ? s->be->fwdfor_hdr_len : sess->fe->fwdfor_hdr_len,
- ci_head(req), &txn->hdr_idx, &ctx)) {
- /* The header is set to be added only if none is present
- * and we found it, so don't do anything.
- */
- }
- else if (cli_conn && cli_conn->addr.from.ss_family == AF_INET) {
- /* Add an X-Forwarded-For header unless the source IP is
- * in the 'except' network range.
- */
- if ((!sess->fe->except_mask.s_addr ||
- (((struct sockaddr_in *)&cli_conn->addr.from)->sin_addr.s_addr & sess->fe->except_mask.s_addr)
- != sess->fe->except_net.s_addr) &&
- (!s->be->except_mask.s_addr ||
- (((struct sockaddr_in *)&cli_conn->addr.from)->sin_addr.s_addr & s->be->except_mask.s_addr)
- != s->be->except_net.s_addr)) {
- int len;
- unsigned char *pn;
- pn = (unsigned char *)&((struct sockaddr_in *)&cli_conn->addr.from)->sin_addr;
-
- /* Note: we rely on the backend to get the header name to be used for
- * x-forwarded-for, because the header is really meant for the backends.
- * However, if the backend did not specify any option, we have to rely
- * on the frontend's header name.
- */
- if (s->be->fwdfor_hdr_len) {
- len = s->be->fwdfor_hdr_len;
- memcpy(trash.area,
- s->be->fwdfor_hdr_name, len);
- } else {
- len = sess->fe->fwdfor_hdr_len;
- memcpy(trash.area,
- sess->fe->fwdfor_hdr_name, len);
- }
- len += snprintf(trash.area + len,
- trash.size - len,
- ": %d.%d.%d.%d", pn[0], pn[1],
- pn[2], pn[3]);
-
- if (unlikely(http_header_add_tail2(&txn->req, &txn->hdr_idx, trash.area, len) < 0))
- goto return_bad_req;
- }
- }
- else if (cli_conn && cli_conn->addr.from.ss_family == AF_INET6) {
- /* FIXME: for the sake of completeness, we should also support
- * 'except' here, although it is mostly useless in this case.
- */
- int len;
- char pn[INET6_ADDRSTRLEN];
- inet_ntop(AF_INET6,
- (const void *)&((struct sockaddr_in6 *)(&cli_conn->addr.from))->sin6_addr,
- pn, sizeof(pn));
-
- /* Note: we rely on the backend to get the header name to be used for
- * x-forwarded-for, because the header is really meant for the backends.
- * However, if the backend did not specify any option, we have to rely
- * on the frontend's header name.
- */
- if (s->be->fwdfor_hdr_len) {
- len = s->be->fwdfor_hdr_len;
- memcpy(trash.area, s->be->fwdfor_hdr_name,
- len);
- } else {
- len = sess->fe->fwdfor_hdr_len;
- memcpy(trash.area, sess->fe->fwdfor_hdr_name,
- len);
- }
- len += snprintf(trash.area + len, trash.size - len,
- ": %s", pn);
-
- if (unlikely(http_header_add_tail2(&txn->req, &txn->hdr_idx, trash.area, len) < 0))
- goto return_bad_req;
- }
- }
-
- /*
- * 10: add X-Original-To if either the frontend or the backend
- * asks for it.
- */
- if ((sess->fe->options | s->be->options) & PR_O_ORGTO) {
-
- /* FIXME: don't know if IPv6 can handle that case too. */
- if (cli_conn && cli_conn->addr.from.ss_family == AF_INET) {
- /* Add an X-Original-To header unless the destination IP is
- * in the 'except' network range.
- */
- conn_get_to_addr(cli_conn);
-
- if (cli_conn->addr.to.ss_family == AF_INET &&
- ((!sess->fe->except_mask_to.s_addr ||
- (((struct sockaddr_in *)&cli_conn->addr.to)->sin_addr.s_addr & sess->fe->except_mask_to.s_addr)
- != sess->fe->except_to.s_addr) &&
- (!s->be->except_mask_to.s_addr ||
- (((struct sockaddr_in *)&cli_conn->addr.to)->sin_addr.s_addr & s->be->except_mask_to.s_addr)
- != s->be->except_to.s_addr))) {
- int len;
- unsigned char *pn;
- pn = (unsigned char *)&((struct sockaddr_in *)&cli_conn->addr.to)->sin_addr;
-
- /* Note: we rely on the backend to get the header name to be used for
- * x-original-to, because the header is really meant for the backends.
- * However, if the backend did not specify any option, we have to rely
- * on the frontend's header name.
- */
- if (s->be->orgto_hdr_len) {
- len = s->be->orgto_hdr_len;
- memcpy(trash.area,
- s->be->orgto_hdr_name, len);
- } else {
- len = sess->fe->orgto_hdr_len;
- memcpy(trash.area,
- sess->fe->orgto_hdr_name, len);
- }
- len += snprintf(trash.area + len,
- trash.size - len,
- ": %d.%d.%d.%d", pn[0], pn[1],
- pn[2], pn[3]);
-
- if (unlikely(http_header_add_tail2(&txn->req, &txn->hdr_idx, trash.area, len) < 0))
- goto return_bad_req;
- }
- }
- }
-
- /* 11: add "Connection: close" or "Connection: keep-alive" if needed and not yet set.
- * If an "Upgrade" token is found, the header is left untouched in order not to have
- * to deal with some servers bugs : some of them fail an Upgrade if anything but
- * "Upgrade" is present in the Connection header.
- */
- if (!(txn->flags & TX_HDR_CONN_UPG) && (txn->flags & TX_CON_WANT_MSK) != TX_CON_WANT_TUN) {
- unsigned int want_flags = 0;
-
- if (msg->flags & HTTP_MSGF_VER_11) {
- if ((txn->flags & TX_CON_WANT_MSK) >= TX_CON_WANT_SCL &&
- !((sess->fe->options2|s->be->options2) & PR_O2_FAKE_KA))
- want_flags |= TX_CON_CLO_SET;
- } else {
- if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_KAL ||
- ((sess->fe->options2|s->be->options2) & PR_O2_FAKE_KA))
- want_flags |= TX_CON_KAL_SET;
- }
-
- if (want_flags != (txn->flags & (TX_CON_CLO_SET|TX_CON_KAL_SET)))
- http_change_connection_header(txn, msg, want_flags);
- }
-
-
- /* If we have no server assigned yet and we're balancing on url_param
- * with a POST request, we may be interested in checking the body for
- * that parameter. This will be done in another analyser.
- */
- if (!(s->flags & (SF_ASSIGNED|SF_DIRECT)) &&
- s->txn->meth == HTTP_METH_POST &&
- (s->be->lbprm.algo & BE_LB_ALGO) == BE_LB_ALGO_PH &&
- (msg->flags & (HTTP_MSGF_CNT_LEN|HTTP_MSGF_TE_CHNK))) {
- channel_dont_connect(req);
- req->analysers |= AN_REQ_HTTP_BODY;
- }
-
- req->analysers &= ~AN_REQ_FLT_XFER_DATA;
- req->analysers |= AN_REQ_HTTP_XFER_BODY;
-
- /* We expect some data from the client. Unless we know for sure
- * we already have a full request, we have to re-enable quick-ack
- * in case we previously disabled it, otherwise we might cause
- * the client to delay further data.
- */
- if ((sess->listener->options & LI_O_NOQUICKACK) &&
- ((msg->flags & HTTP_MSGF_TE_CHNK) ||
- (msg->body_len > ci_data(req) - txn->req.eoh - 2)))
- conn_set_quickack(cli_conn, 1);
-
- /*************************************************************
- * OK, that's finished for the headers. We have done what we *
- * could. Let's switch to the DATA state. *
- ************************************************************/
- req->analyse_exp = TICK_ETERNITY;
- req->analysers &= ~an_bit;
-
- s->logs.tv_request = now;
- /* OK let's go on with the BODY now */
- return 1;
-
- return_bad_req: /* let's centralize all bad requests */
- if (unlikely(msg->msg_state == HTTP_MSG_ERROR) || msg->err_pos >= 0) {
- /* we detected a parsing error. We want to archive this request
- * in the dedicated proxy area for later troubleshooting.
- */
- http_capture_bad_message(sess->fe, s, msg, msg->err_state, sess->fe);
- }
-
- txn->req.err_state = txn->req.msg_state;
- txn->req.msg_state = HTTP_MSG_ERROR;
- txn->status = 400;
- req->analysers &= AN_REQ_FLT_END;
- http_reply_and_close(s, txn->status, http_error_message(s));
-
- _HA_ATOMIC_ADD(&sess->fe->fe_counters.failed_req, 1);
- if (sess->listener->counters)
- _HA_ATOMIC_ADD(&sess->listener->counters->failed_req, 1);
-
- if (!(s->flags & SF_ERR_MASK))
- s->flags |= SF_ERR_PRXCOND;
- if (!(s->flags & SF_FINST_MASK))
- s->flags |= SF_FINST_R;
- return 0;
-}
-
-/* This function is an analyser which processes the HTTP tarpit. It always
- * returns zero, at the beginning because it prevents any other processing
- * from occurring, and at the end because it terminates the request.
- */
-int http_process_tarpit(struct stream *s, struct channel *req, int an_bit)
-{
- struct http_txn *txn = s->txn;
-
- if (IS_HTX_STRM(s))
- return htx_process_tarpit(s, req, an_bit);
-
- /* This connection is being tarpitted. The CLIENT side has
- * already set the connect expiration date to the right
- * timeout. We just have to check that the client is still
- * there and that the timeout has not expired.
- */
- channel_dont_connect(req);
- if ((req->flags & (CF_SHUTR|CF_READ_ERROR)) == 0 &&
- !tick_is_expired(req->analyse_exp, now_ms))
- return 0;
-
- /* We will set the queue timer to the time spent, just for
- * logging purposes. We fake a 500 server error, so that the
- * attacker will not suspect his connection has been tarpitted.
- * It will not cause trouble to the logs because we can exclude
- * the tarpitted connections by filtering on the 'PT' status flags.
- */
- s->logs.t_queue = tv_ms_elapsed(&s->logs.tv_accept, &now);
-
- if (!(req->flags & CF_READ_ERROR))
- http_reply_and_close(s, txn->status, http_error_message(s));
-
- req->analysers &= AN_REQ_FLT_END;
- req->analyse_exp = TICK_ETERNITY;
-
- if (!(s->flags & SF_ERR_MASK))
- s->flags |= SF_ERR_PRXCOND;
- if (!(s->flags & SF_FINST_MASK))
- s->flags |= SF_FINST_T;
- return 0;
-}
-
-/* This function is an analyser which waits for the HTTP request body. It waits
- * for either the buffer to be full, or the full advertised contents to have
- * reached the buffer. It must only be called after the standard HTTP request
- * processing has occurred, because it expects the request to be parsed and will
- * look for the Expect header. It may send a 100-Continue interim response. It
- * takes in input any state starting from HTTP_MSG_BODY and leaves with one of
- * HTTP_MSG_CHK_SIZE, HTTP_MSG_DATA or HTTP_MSG_TRAILERS. It returns zero if it
- * needs to read more data, or 1 once it has completed its analysis.
- */
-int http_wait_for_request_body(struct stream *s, struct channel *req, int an_bit)
-{
- struct session *sess = s->sess;
- struct http_txn *txn = s->txn;
- struct http_msg *msg = &s->txn->req;
-
- if (IS_HTX_STRM(s))
- return htx_wait_for_request_body(s, req, an_bit);
-
- if (msg->msg_state < HTTP_MSG_BODY)
- goto missing_data;
-
- /* We have to parse the HTTP request body to find any required data.
- * "balance url_param check_post" should have been the only way to get
- * into this. We were brought here after HTTP header analysis, so all
- * related structures are ready.
- */
- if (msg->msg_state < HTTP_MSG_CHUNK_SIZE) {
- http_handle_expect_hdr(s, req, msg);
-
- /* we have msg->sov which points to the first byte of message body.
- * ci_head(req) still points to the beginning of the message. We
- * must save the body in msg->next because it survives buffer
- * re-alignments.
- */
- msg->next = msg->sov;
-
- if (msg->flags & HTTP_MSGF_TE_CHNK)
- msg->msg_state = HTTP_MSG_CHUNK_SIZE;
- else
- msg->msg_state = HTTP_MSG_DATA;
- }
-
- if (!(msg->flags & HTTP_MSGF_TE_CHNK)) {
- /* We're in content-length mode, we just have to wait for enough data. */
- if (http_body_bytes(msg) < msg->body_len)
- goto missing_data;
-
- /* OK we have everything we need now */
- goto http_end;
- }
-
- /* OK here we're parsing a chunked-encoded message */
-
- if (msg->msg_state == HTTP_MSG_CHUNK_SIZE) {
- /* read the chunk size and assign it to ->chunk_len, then
- * set ->sov and ->next to point to the body and switch to DATA or
- * TRAILERS state.
- */
- unsigned int chunk;
- int ret = h1_parse_chunk_size(&req->buf, co_data(req) + msg->next, c_data(req), &chunk);
-
- if (!ret)
- goto missing_data;
- else if (ret < 0) {
- msg->err_pos = ci_data(req) + ret;
- if (msg->err_pos < 0)
- msg->err_pos += req->buf.size;
- stream_inc_http_err_ctr(s);
- goto return_bad_req;
- }
-
- msg->chunk_len = chunk;
- msg->body_len += chunk;
-
- msg->sol = ret;
- msg->next += ret;
- msg->msg_state = msg->chunk_len ? HTTP_MSG_DATA : HTTP_MSG_TRAILERS;
- }
-
- /* Now we're in HTTP_MSG_DATA or HTTP_MSG_TRAILERS state.
- * We have the first data byte is in msg->sov + msg->sol. We're waiting
- * for at least a whole chunk or the whole content length bytes after
- * msg->sov + msg->sol.
- */
- if (msg->msg_state == HTTP_MSG_TRAILERS)
- goto http_end;
-
- if (http_body_bytes(msg) >= msg->body_len) /* we have enough bytes now */
- goto http_end;
-
- missing_data:
- /* we get here if we need to wait for more data. If the buffer is full,
- * we have the maximum we can expect.
- */
- if (channel_full(req, global.tune.maxrewrite))
- goto http_end;
-
- if ((req->flags & CF_READ_TIMEOUT) || tick_is_expired(req->analyse_exp, now_ms)) {
- txn->status = 408;
- http_reply_and_close(s, txn->status, http_error_message(s));
-
- if (!(s->flags & SF_ERR_MASK))
- s->flags |= SF_ERR_CLITO;
- if (!(s->flags & SF_FINST_MASK))
- s->flags |= SF_FINST_D;
- goto return_err_msg;
- }
-
- /* we get here if we need to wait for more data */
- if (!(req->flags & (CF_SHUTR | CF_READ_ERROR))) {
- /* Not enough data. We'll re-use the http-request
- * timeout here. Ideally, we should set the timeout
- * relative to the accept() date. We just set the
- * request timeout once at the beginning of the
- * request.
- */
- channel_dont_connect(req);
- if (!tick_isset(req->analyse_exp))
- req->analyse_exp = tick_add_ifset(now_ms, s->be->timeout.httpreq);
- return 0;
- }
-
- http_end:
- /* The situation will not evolve, so let's give up on the analysis. */
- s->logs.tv_request = now; /* update the request timer to reflect full request */
- req->analysers &= ~an_bit;
- req->analyse_exp = TICK_ETERNITY;
- return 1;
-
- return_bad_req: /* let's centralize all bad requests */
- txn->req.err_state = txn->req.msg_state;
- txn->req.msg_state = HTTP_MSG_ERROR;
- txn->status = 400;
- http_reply_and_close(s, txn->status, http_error_message(s));
-
- if (!(s->flags & SF_ERR_MASK))
- s->flags |= SF_ERR_PRXCOND;
- if (!(s->flags & SF_FINST_MASK))
- s->flags |= SF_FINST_R;
-
- return_err_msg:
- req->analysers &= AN_REQ_FLT_END;
- _HA_ATOMIC_ADD(&sess->fe->fe_counters.failed_req, 1);
- if (sess->listener->counters)
- _HA_ATOMIC_ADD(&sess->listener->counters->failed_req, 1);
- return 0;
-}
-
-/* send a server's name with an outgoing request over an established connection.
- * Note: this function is designed to be called once the request has been scheduled
- * for being forwarded. This is the reason why it rewinds the buffer before
- * proceeding.
- */
-int http_send_name_header(struct stream *s, struct proxy* be, const char* srv_name) {
-
- struct hdr_ctx ctx;
- struct http_txn *txn = s->txn;
- char *hdr_name = be->server_id_hdr_name;
- int hdr_name_len = be->server_id_hdr_len;
- struct channel *chn = txn->req.chn;
- char *hdr_val;
- unsigned int old_o, old_i;
-
- if (IS_HTX_STRM(s))
- return htx_send_name_header(s, be, srv_name);
- ctx.idx = 0;
-
- old_o = http_hdr_rewind(&txn->req);
- if (old_o) {
- /* The request was already skipped, let's restore it */
- c_rew(chn, old_o);
- txn->req.next += old_o;
- txn->req.sov += old_o;
- }
-
- old_i = ci_data(chn);
- while (http_find_header2(hdr_name, hdr_name_len, ci_head(txn->req.chn), &txn->hdr_idx, &ctx)) {
- /* remove any existing values from the header */
- http_remove_header2(&txn->req, &txn->hdr_idx, &ctx);
- }
-
- /* Add the new header requested with the server value */
- hdr_val = trash.area;
- memcpy(hdr_val, hdr_name, hdr_name_len);
- hdr_val += hdr_name_len;
- *hdr_val++ = ':';
- *hdr_val++ = ' ';
- hdr_val += strlcpy2(hdr_val, srv_name,
- trash.area + trash.size - hdr_val);
- http_header_add_tail2(&txn->req, &txn->hdr_idx, trash.area,
- hdr_val - trash.area);
-
- if (old_o) {
- /* If this was a forwarded request, we must readjust the amount of
- * data to be forwarded in order to take into account the size
- * variations. Note that the current state is >= HTTP_MSG_BODY,
- * so we don't have to adjust ->sol.
- */
- old_o += ci_data(chn) - old_i;
- c_adv(chn, old_o);
- txn->req.next -= old_o;
- txn->req.sov -= old_o;
- }
-
- return 0;
-}
-
-/* Terminate current transaction and prepare a new one. This is very tricky
- * right now but it works.
- */
-void http_end_txn_clean_session(struct stream *s)
-{
- int prev_status = s->txn->status;
- struct proxy *fe = strm_fe(s);
- struct proxy *be = s->be;
- struct conn_stream *cs;
- struct connection *srv_conn;
- struct server *srv;
- unsigned int prev_flags = s->txn->flags;
-
- /* FIXME: We need a more portable way of releasing a backend's and a
- * server's connections. We need a safer way to reinitialize buffer
- * flags. We also need a more accurate method for computing per-request
- * data.
- */
- cs = objt_cs(s->si[1].end);
- srv_conn = cs_conn(cs);
-
- /* unless we're doing keep-alive, we want to quickly close the connection
- * to the server.
- */
- if (((s->txn->flags & TX_CON_WANT_MSK) != TX_CON_WANT_KAL) ||
- !si_conn_ready(&s->si[1]) || !srv_conn->owner) {
- s->si[1].flags |= SI_FL_NOLINGER | SI_FL_NOHALF;
- si_shutr(&s->si[1]);
- si_shutw(&s->si[1]);
- }
-
- if (s->flags & SF_BE_ASSIGNED) {
- _HA_ATOMIC_SUB(&be->beconn, 1);
- if (unlikely(s->srv_conn))
- sess_change_server(s, NULL);
- }
-
- s->logs.t_close = tv_ms_elapsed(&s->logs.tv_accept, &now);
- stream_process_counters(s);
-
- if (s->txn->status) {
- int n;
-
- n = s->txn->status / 100;
- if (n < 1 || n > 5)
- n = 0;
-
- if (fe->mode == PR_MODE_HTTP) {
- _HA_ATOMIC_ADD(&fe->fe_counters.p.http.rsp[n], 1);
- }
- if ((s->flags & SF_BE_ASSIGNED) &&
- (be->mode == PR_MODE_HTTP)) {
- _HA_ATOMIC_ADD(&be->be_counters.p.http.rsp[n], 1);
- _HA_ATOMIC_ADD(&be->be_counters.p.http.cum_req, 1);
- }
- }
-
- /* don't count other requests' data */
- s->logs.bytes_in -= ci_data(&s->req);
- s->logs.bytes_out -= ci_data(&s->res);
-
- /* we may need to know the position in the queue */
- pendconn_free(s);
-
- /* let's do a final log if we need it */
- if (!LIST_ISEMPTY(&fe->logformat) && s->logs.logwait &&
- !(s->flags & SF_MONITOR) &&
- (!(fe->options & PR_O_NULLNOLOG) || s->req.total)) {
- s->do_log(s);
- }
-
- /* stop tracking content-based counters */
- stream_stop_content_counters(s);
- stream_update_time_stats(s);
-
- /* reset the profiling counter */
- s->task->calls = 0;
- s->task->cpu_time = 0;
- s->task->lat_time = 0;
- s->task->call_date = ((profiling & HA_PROF_TASKS_MASK) >= HA_PROF_TASKS_AUTO) ? now_mono_time() : 0;
- s->call_rate.curr_sec = s->call_rate.curr_ctr = s->call_rate.prev_ctr = 0;
-
- s->logs.accept_date = date; /* user-visible date for logging */
- s->logs.tv_accept = now; /* corrected date for internal use */
- s->logs.t_handshake = 0; /* There are no handshake in keep alive connection. */
- s->logs.t_idle = -1;
- tv_zero(&s->logs.tv_request);
- s->logs.t_queue = -1;
- s->logs.t_connect = -1;
- s->logs.t_data = -1;
- s->logs.t_close = 0;
- s->logs.prx_queue_pos = 0; /* we get the number of pending conns before us */
- s->logs.srv_queue_pos = 0; /* we will get this number soon */
-
- s->logs.bytes_in = s->req.total = ci_data(&s->req);
- s->logs.bytes_out = s->res.total = ci_data(&s->res);
-
- if (objt_server(s->target)) {
- if (s->flags & SF_CURR_SESS) {
- s->flags &= ~SF_CURR_SESS;
- _HA_ATOMIC_SUB(&__objt_server(s->target)->cur_sess, 1);
- }
- if (may_dequeue_tasks(objt_server(s->target), be))
- process_srv_queue(objt_server(s->target));
- }
-
- s->target = NULL;
-
-
- /* If we're doing keepalive, first call the mux detach() method
- * to let it know we want to detach without freing the connection.
- * We then can call si_release_endpoint() to destroy the conn_stream
- */
- if (((s->txn->flags & TX_CON_WANT_MSK) != TX_CON_WANT_KAL) ||
- !si_conn_ready(&s->si[1]) ||
- (srv_conn && srv_conn->flags & (CO_FL_ERROR | CO_FL_SOCK_RD_SH | CO_FL_SOCK_WR_SH)))
- srv_conn = NULL;
- else if (!srv_conn->owner) {
- srv_conn->owner = s->sess;
- /* Add it unconditionally to the session list, it'll be removed
- * later if needed by session_check_idle_conn(), once we'll
- * have released the endpoint and know if it no longer has
- * attached streams, and so an idling connection
- */
- if (!session_add_conn(s->sess, srv_conn, s->target)) {
- srv_conn->owner = NULL;
- /* Try to add the connection to the server idle list.
- * If it fails, as the connection no longer has an
- * owner, it will be destroy later by
- * si_release_endpoint(), anyway
- */
- srv_add_to_idle_list(objt_server(srv_conn->target), srv_conn);
- srv_conn = NULL;
-
- }
- }
- si_release_endpoint(&s->si[1]);
- if (srv_conn && srv_conn->owner == s->sess) {
- if (session_check_idle_conn(s->sess, srv_conn) != 0)
- srv_conn = NULL;
- }
-
-
- s->si[1].state = s->si[1].prev_state = SI_ST_INI;
- s->si[1].err_type = SI_ET_NONE;
- s->si[1].conn_retries = 0; /* used for logging too */
- s->si[1].exp = TICK_ETERNITY;
- s->si[1].flags &= SI_FL_ISBACK | SI_FL_DONT_WAKE; /* we're in the context of process_stream */
- s->req.flags &= ~(CF_SHUTW|CF_SHUTW_NOW|CF_AUTO_CONNECT|CF_WRITE_ERROR|CF_STREAMER|CF_STREAMER_FAST|CF_NEVER_WAIT|CF_WAKE_CONNECT|CF_WROTE_DATA);
- s->res.flags &= ~(CF_SHUTR|CF_SHUTR_NOW|CF_READ_ATTACHED|CF_READ_ERROR|CF_READ_NOEXP|CF_STREAMER|CF_STREAMER_FAST|CF_WRITE_PARTIAL|CF_NEVER_WAIT|CF_WROTE_DATA);
- s->flags &= ~(SF_DIRECT|SF_ASSIGNED|SF_ADDR_SET|SF_BE_ASSIGNED|SF_FORCE_PRST|SF_IGNORE_PRST);
- s->flags &= ~(SF_CURR_SESS|SF_REDIRECTABLE|SF_SRV_REUSED);
- s->flags &= ~(SF_ERR_MASK|SF_FINST_MASK|SF_REDISP);
-
- hlua_ctx_destroy(s->hlua);
- s->hlua = NULL;
-
- s->txn->meth = 0;
- http_reset_txn(s);
- s->txn->flags |= TX_NOT_FIRST | TX_WAIT_NEXT_RQ;
-
- if (prev_status == 401 || prev_status == 407) {
- /* In HTTP keep-alive mode, if we receive a 401, we still have
- * a chance of being able to send the visitor again to the same
- * server over the same connection. This is required by some
- * broken protocols such as NTLM, and anyway whenever there is
- * an opportunity for sending the challenge to the proper place,
- * it's better to do it (at least it helps with debugging), at
- * least for non-deterministic load balancing algorithms.
- */
- s->sess->flags |= SESS_FL_PREFER_LAST;
- }
-
- /* Never ever allow to reuse a connection from a non-reuse backend */
- if (srv_conn && (be->options & PR_O_REUSE_MASK) == PR_O_REUSE_NEVR)
- srv_conn->flags |= CO_FL_PRIVATE;
-
- if (fe->options2 & PR_O2_INDEPSTR)
- s->si[1].flags |= SI_FL_INDEP_STR;
-
- if (fe->options2 & PR_O2_NODELAY) {
- s->req.flags |= CF_NEVER_WAIT;
- s->res.flags |= CF_NEVER_WAIT;
- }
-
- /* we're removing the analysers, we MUST re-enable events detection.
- * We don't enable close on the response channel since it's either
- * already closed, or in keep-alive with an idle connection handler.
- */
- channel_auto_read(&s->req);
- channel_auto_close(&s->req);
- channel_auto_read(&s->res);
-
- /* we're in keep-alive with an idle connection, monitor it if not already done */
- if (srv_conn && LIST_ISEMPTY(&srv_conn->list)) {
- srv = objt_server(srv_conn->target);
- if (srv) {
- if (srv_conn->flags & CO_FL_PRIVATE)
- LIST_ADD(&srv->priv_conns[tid], &srv_conn->list);
- else if (prev_flags & TX_NOT_FIRST)
- /* note: we check the request, not the connection, but
- * this is valid for strategies SAFE and AGGR, and in
- * case of ALWS, we don't care anyway.
- */
- LIST_ADD(&srv->safe_conns[tid], &srv_conn->list);
- else
- LIST_ADD(&srv->idle_conns[tid], &srv_conn->list);
- }
- }
- s->req.analysers = strm_li(s) ? strm_li(s)->analysers : 0;
- s->res.analysers = 0;
-}
-
-
-/* This function updates the request state machine according to the response
- * state machine and buffer flags. It returns 1 if it changes anything (flag
- * or state), otherwise zero. It ignores any state before HTTP_MSG_DONE, as
- * it is only used to find when a request/response couple is complete. Both
- * this function and its equivalent should loop until both return zero. It
- * can set its own state to DONE, CLOSING, CLOSED, TUNNEL, ERROR.
- */
-int http_sync_req_state(struct stream *s)
-{
- struct channel *chn = &s->req;
- struct http_txn *txn = s->txn;
- unsigned int old_flags = chn->flags;
- unsigned int old_state = txn->req.msg_state;
-
- if (unlikely(txn->req.msg_state < HTTP_MSG_DONE))
- return 0;
-
- if (txn->req.msg_state == HTTP_MSG_DONE) {
- /* No need to read anymore, the request was completely parsed.
- * We can shut the read side unless we want to abort_on_close,
- * or we have a POST request. The issue with POST requests is
- * that some browsers still send a CRLF after the request, and
- * this CRLF must be read so that it does not remain in the kernel
- * buffers, otherwise a close could cause an RST on some systems
- * (eg: Linux).
- * Note that if we're using keep-alive on the client side, we'd
- * rather poll now and keep the polling enabled for the whole
- * stream's life than enabling/disabling it between each
- * response and next request.
- */
- if (((txn->flags & TX_CON_WANT_MSK) != TX_CON_WANT_SCL) &&
- ((txn->flags & TX_CON_WANT_MSK) != TX_CON_WANT_KAL) &&
- !(s->be->options & PR_O_ABRT_CLOSE) &&
- txn->meth != HTTP_METH_POST)
- channel_dont_read(chn);
-
- /* if the server closes the connection, we want to immediately react
- * and close the socket to save packets and syscalls.
- */
- s->si[1].flags |= SI_FL_NOHALF;
-
- /* In any case we've finished parsing the request so we must
- * disable Nagle when sending data because 1) we're not going
- * to shut this side, and 2) the server is waiting for us to
- * send pending data.
- */
- chn->flags |= CF_NEVER_WAIT;
-
- if (txn->rsp.msg_state == HTTP_MSG_ERROR)
- goto wait_other_side;
-
- if (txn->rsp.msg_state < HTTP_MSG_DONE) {
- /* The server has not finished to respond, so we
- * don't want to move in order not to upset it.
- */
- goto wait_other_side;
- }
-
- /* When we get here, it means that both the request and the
- * response have finished receiving. Depending on the connection
- * mode, we'll have to wait for the last bytes to leave in either
- * direction, and sometimes for a close to be effective.
- */
-
- if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL) {
- /* Server-close mode : queue a connection close to the server */
- if (!(chn->flags & (CF_SHUTW|CF_SHUTW_NOW)))
- channel_shutw_now(chn);
- }
- else if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_CLO) {
- /* Option forceclose is set, or either side wants to close,
- * let's enforce it now that we're not expecting any new
- * data to come. The caller knows the stream is complete
- * once both states are CLOSED.
- *
- * However, there is an exception if the response
- * length is undefined. In this case, we need to wait
- * the close from the server. The response will be
- * switched in TUNNEL mode until the end.
- */
- if (!(txn->rsp.flags & HTTP_MSGF_XFER_LEN) &&
- txn->rsp.msg_state != HTTP_MSG_CLOSED)
- goto check_channel_flags;
-
- if (!(chn->flags & (CF_SHUTW|CF_SHUTW_NOW))) {
- channel_shutr_now(chn);
- channel_shutw_now(chn);
- }
- }
- else {
- /* The last possible modes are keep-alive and tunnel. Tunnel mode
- * will not have any analyser so it needs to poll for reads.
- */
- if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_TUN) {
- channel_auto_read(chn);
- txn->req.msg_state = HTTP_MSG_TUNNEL;
- }
- }
-
- goto check_channel_flags;
- }
-
- if (txn->req.msg_state == HTTP_MSG_CLOSING) {
- http_msg_closing:
- /* nothing else to forward, just waiting for the output buffer
- * to be empty and for the shutw_now to take effect.
- */
- if (channel_is_empty(chn)) {
- txn->req.msg_state = HTTP_MSG_CLOSED;
- goto http_msg_closed;
- }
- else if (chn->flags & CF_SHUTW) {
- txn->req.err_state = txn->req.msg_state;
- txn->req.msg_state = HTTP_MSG_ERROR;
- }
- goto wait_other_side;
- }
-
- if (txn->req.msg_state == HTTP_MSG_CLOSED) {
- http_msg_closed:
- /* if we don't know whether the server will close, we need to hard close */
- if (txn->rsp.flags & HTTP_MSGF_XFER_LEN)
- s->si[1].flags |= SI_FL_NOLINGER; /* we want to close ASAP */
-
- /* see above in MSG_DONE why we only do this in these states */
- if (((txn->flags & TX_CON_WANT_MSK) != TX_CON_WANT_SCL) &&
- ((txn->flags & TX_CON_WANT_MSK) != TX_CON_WANT_KAL) &&
- !(s->be->options & PR_O_ABRT_CLOSE))
- channel_dont_read(chn);
- goto wait_other_side;
- }
-
- check_channel_flags:
- /* Here, we are in HTTP_MSG_DONE or HTTP_MSG_TUNNEL */
- if (chn->flags & (CF_SHUTW|CF_SHUTW_NOW)) {
- /* if we've just closed an output, let's switch */
- txn->req.msg_state = HTTP_MSG_CLOSING;
- goto http_msg_closing;
- }
-
-
- wait_other_side:
- return txn->req.msg_state != old_state || chn->flags != old_flags;
-}
-
-
-/* This function updates the response state machine according to the request
- * state machine and buffer flags. It returns 1 if it changes anything (flag
- * or state), otherwise zero. It ignores any state before HTTP_MSG_DONE, as
- * it is only used to find when a request/response couple is complete. Both
- * this function and its equivalent should loop until both return zero. It
- * can set its own state to DONE, CLOSING, CLOSED, TUNNEL, ERROR.
- */
-int http_sync_res_state(struct stream *s)
-{
- struct channel *chn = &s->res;
- struct http_txn *txn = s->txn;
- unsigned int old_flags = chn->flags;
- unsigned int old_state = txn->rsp.msg_state;
-
- if (unlikely(txn->rsp.msg_state < HTTP_MSG_DONE))
- return 0;
-
- if (txn->rsp.msg_state == HTTP_MSG_DONE) {
- /* In theory, we don't need to read anymore, but we must
- * still monitor the server connection for a possible close
- * while the request is being uploaded, so we don't disable
- * reading.
- */
- /* channel_dont_read(chn); */
-
- if (txn->req.msg_state == HTTP_MSG_ERROR)
- goto wait_other_side;
-
- if (txn->req.msg_state < HTTP_MSG_DONE) {
- /* The client seems to still be sending data, probably
- * because we got an error response during an upload.
- * We have the choice of either breaking the connection
- * or letting it pass through. Let's do the later.
- */
- goto wait_other_side;
- }
-
- /* When we get here, it means that both the request and the
- * response have finished receiving. Depending on the connection
- * mode, we'll have to wait for the last bytes to leave in either
- * direction, and sometimes for a close to be effective.
- */
-
- if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL) {
- /* Server-close mode : shut read and wait for the request
- * side to close its output buffer. The caller will detect
- * when we're in DONE and the other is in CLOSED and will
- * catch that for the final cleanup.
- */
- if (!(chn->flags & (CF_SHUTR|CF_SHUTR_NOW)))
- channel_shutr_now(chn);
- }
- else if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_CLO) {
- /* Option forceclose is set, or either side wants to close,
- * let's enforce it now that we're not expecting any new
- * data to come. The caller knows the stream is complete
- * once both states are CLOSED.
- */
- if (!(chn->flags & (CF_SHUTW|CF_SHUTW_NOW))) {
- channel_shutr_now(chn);
- channel_shutw_now(chn);
- }
- }
- else {
- /* The last possible modes are keep-alive and tunnel. Tunnel will
- * need to forward remaining data. Keep-alive will need to monitor
- * for connection closing.
- */
- channel_auto_read(chn);
- chn->flags |= CF_NEVER_WAIT;
- if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_TUN)
- txn->rsp.msg_state = HTTP_MSG_TUNNEL;
- }
-
- goto check_channel_flags;
- }
-
- if (txn->rsp.msg_state == HTTP_MSG_CLOSING) {
- http_msg_closing:
- /* nothing else to forward, just waiting for the output buffer
- * to be empty and for the shutw_now to take effect.
- */
- if (channel_is_empty(chn)) {
- txn->rsp.msg_state = HTTP_MSG_CLOSED;
- goto http_msg_closed;
- }
- else if (chn->flags & CF_SHUTW) {
- txn->rsp.err_state = txn->rsp.msg_state;
- txn->rsp.msg_state = HTTP_MSG_ERROR;
- _HA_ATOMIC_ADD(&s->be->be_counters.cli_aborts, 1);
- if (objt_server(s->target))
- _HA_ATOMIC_ADD(&objt_server(s->target)->counters.cli_aborts, 1);
- }
- goto wait_other_side;
- }
-
- if (txn->rsp.msg_state == HTTP_MSG_CLOSED) {
- http_msg_closed:
- /* drop any pending data */
- channel_truncate(chn);
- channel_auto_close(chn);
- channel_auto_read(chn);
- goto wait_other_side;
- }
-
- check_channel_flags:
- /* Here, we are in HTTP_MSG_DONE or HTTP_MSG_TUNNEL */
- if (chn->flags & (CF_SHUTW|CF_SHUTW_NOW)) {
- /* if we've just closed an output, let's switch */
- txn->rsp.msg_state = HTTP_MSG_CLOSING;
- goto http_msg_closing;
- }
-
- wait_other_side:
- /* We force the response to leave immediately if we're waiting for the
- * other side, since there is no pending shutdown to push it out.
- */
- if (!channel_is_empty(chn))
- chn->flags |= CF_SEND_DONTWAIT;
- return txn->rsp.msg_state != old_state || chn->flags != old_flags;
-}
-
-
-/* Resync the request and response state machines. */
-void http_resync_states(struct stream *s)
-{
- struct http_txn *txn = s->txn;
-#ifdef DEBUG_FULL
- int old_req_state = txn->req.msg_state;
- int old_res_state = txn->rsp.msg_state;
-#endif
-
- http_sync_req_state(s);
- while (1) {
- if (!http_sync_res_state(s))
- break;
- if (!http_sync_req_state(s))
- break;
- }
-
- DPRINTF(stderr,"[%u] %s: stream=%p old=%s,%s cur=%s,%s "
- "req->analysers=0x%08x res->analysers=0x%08x\n",
- now_ms, __FUNCTION__, s,
- h1_msg_state_str(old_req_state), h1_msg_state_str(old_res_state),
- h1_msg_state_str(txn->req.msg_state), h1_msg_state_str(txn->rsp.msg_state),
- s->req.analysers, s->res.analysers);
-
-
- /* OK, both state machines agree on a compatible state.
- * There are a few cases we're interested in :
- * - HTTP_MSG_CLOSED on both sides means we've reached the end in both
- * directions, so let's simply disable both analysers.
- * - HTTP_MSG_CLOSED on the response only or HTTP_MSG_ERROR on either
- * means we must abort the request.
- * - HTTP_MSG_TUNNEL on either means we have to disable analyser on
- * corresponding channel.
- * - HTTP_MSG_DONE or HTTP_MSG_CLOSED on the request and HTTP_MSG_DONE
- * on the response with server-close mode means we've completed one
- * request and we must re-initialize the server connection.
- */
- if (txn->req.msg_state == HTTP_MSG_CLOSED &&
- txn->rsp.msg_state == HTTP_MSG_CLOSED) {
- s->req.analysers &= AN_REQ_FLT_END;
- channel_auto_close(&s->req);
- channel_auto_read(&s->req);
- s->res.analysers &= AN_RES_FLT_END;
- channel_auto_close(&s->res);
- channel_auto_read(&s->res);
- }
- else if (txn->rsp.msg_state == HTTP_MSG_CLOSED ||
- txn->rsp.msg_state == HTTP_MSG_ERROR ||
- txn->req.msg_state == HTTP_MSG_ERROR) {
- s->res.analysers &= AN_RES_FLT_END;
- channel_auto_close(&s->res);
- channel_auto_read(&s->res);
- s->req.analysers &= AN_REQ_FLT_END;
- channel_abort(&s->req);
- channel_auto_close(&s->req);
- channel_auto_read(&s->req);
- channel_truncate(&s->req);
- }
- else if (txn->req.msg_state == HTTP_MSG_TUNNEL ||
- txn->rsp.msg_state == HTTP_MSG_TUNNEL) {
- if (txn->req.msg_state == HTTP_MSG_TUNNEL) {
- s->req.analysers &= AN_REQ_FLT_END;
- if (HAS_REQ_DATA_FILTERS(s))
- s->req.analysers |= AN_REQ_FLT_XFER_DATA;
- }
- if (txn->rsp.msg_state == HTTP_MSG_TUNNEL) {
- s->res.analysers &= AN_RES_FLT_END;
- if (HAS_RSP_DATA_FILTERS(s))
- s->res.analysers |= AN_RES_FLT_XFER_DATA;
- }
- channel_auto_close(&s->req);
- channel_auto_read(&s->req);
- channel_auto_close(&s->res);
- channel_auto_read(&s->res);
- }
- else if ((txn->req.msg_state == HTTP_MSG_DONE ||
- txn->req.msg_state == HTTP_MSG_CLOSED) &&
- txn->rsp.msg_state == HTTP_MSG_DONE &&
- ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL ||
- (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_KAL)) {
- /* server-close/keep-alive: terminate this transaction,
- * possibly killing the server connection and reinitialize
- * a fresh-new transaction, but only once we're sure there's
- * enough room in the request and response buffer to process
- * another request. They must not hold any pending output data
- * and the response buffer must realigned
- * (realign is done is http_end_txn_clean_session).
- */
- if (co_data(&s->req))
- s->req.flags |= CF_WAKE_WRITE;
- else if (co_data(&s->res))
- s->res.flags |= CF_WAKE_WRITE;
- else {
- s->req.analysers = AN_REQ_FLT_END;
- s->res.analysers = AN_RES_FLT_END;
- txn->flags |= TX_WAIT_CLEANUP;
- }
- }
-}
-
-/* This function is an analyser which forwards request body (including chunk
- * sizes if any). It is called as soon as we must forward, even if we forward
- * zero byte. The only situation where it must not be called is when we're in
- * tunnel mode and we want to forward till the close. It's used both to forward
- * remaining data and to resync after end of body. It expects the msg_state to
- * be between MSG_BODY and MSG_DONE (inclusive). It returns zero if it needs to
- * read more data, or 1 once we can go on with next request or end the stream.
- * When in MSG_DATA or MSG_TRAILERS, it will automatically forward chunk_len
- * bytes of pending data + the headers if not already done.
- */
-int http_request_forward_body(struct stream *s, struct channel *req, int an_bit)
-{
- struct session *sess = s->sess;
- struct http_txn *txn = s->txn;
- struct http_msg *msg = &s->txn->req;
- short status = 0;
- int ret;
-
- if (IS_HTX_STRM(s))
- return htx_request_forward_body(s, req, an_bit);
-
- DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%lu analysers=%02x\n",
- now_ms, __FUNCTION__,
- s,
- req,
- req->rex, req->wex,
- req->flags,
- ci_data(req),
- req->analysers);
-
- if (unlikely(msg->msg_state < HTTP_MSG_BODY))
- return 0;
-
- if ((req->flags & (CF_READ_ERROR|CF_READ_TIMEOUT|CF_WRITE_ERROR|CF_WRITE_TIMEOUT)) ||
- ((req->flags & CF_SHUTW) && (req->to_forward || co_data(req)))) {
- /* Output closed while we were sending data. We must abort and
- * wake the other side up.
- */
- msg->err_state = msg->msg_state;
- msg->msg_state = HTTP_MSG_ERROR;
- http_resync_states(s);
- return 1;
- }
-
- /* Note that we don't have to send 100-continue back because we don't
- * need the data to complete our job, and it's up to the server to
- * decide whether to return 100, 417 or anything else in return of
- * an "Expect: 100-continue" header.
- */
- if (msg->msg_state == HTTP_MSG_BODY) {
- msg->msg_state = ((msg->flags & HTTP_MSGF_TE_CHNK)
- ? HTTP_MSG_CHUNK_SIZE
- : HTTP_MSG_DATA);
-
- /* TODO/filters: when http-buffer-request option is set or if a
- * rule on url_param exists, the first chunk size could be
- * already parsed. In that case, msg->next is after the chunk
- * size (including the CRLF after the size). So this case should
- * be handled to */
- }
-
- /* Some post-connect processing might want us to refrain from starting to
- * forward data. Currently, the only reason for this is "balance url_param"
- * whichs need to parse/process the request after we've enabled forwarding.
- */
- if (unlikely(msg->flags & HTTP_MSGF_WAIT_CONN)) {
- if (!(s->res.flags & CF_READ_ATTACHED)) {
- channel_auto_connect(req);
- req->flags |= CF_WAKE_CONNECT;
- channel_dont_close(req); /* don't fail on early shutr */
- goto waiting;
- }
- msg->flags &= ~HTTP_MSGF_WAIT_CONN;
- }
-
- /* in most states, we should abort in case of early close */
- channel_auto_close(req);
-
- if (req->to_forward) {
- /* We can't process the buffer's contents yet */
- req->flags |= CF_WAKE_WRITE;
- goto missing_data_or_waiting;
- }
-
- if (msg->msg_state < HTTP_MSG_DONE) {
- ret = ((msg->flags & HTTP_MSGF_TE_CHNK)
- ? http_msg_forward_chunked_body(s, msg)
- : http_msg_forward_body(s, msg));
- if (!ret)
- goto missing_data_or_waiting;
- if (ret < 0)
- goto return_bad_req;
- }
-
- /* other states, DONE...TUNNEL */
- /* we don't want to forward closes on DONE except in tunnel mode. */
- if ((txn->flags & TX_CON_WANT_MSK) != TX_CON_WANT_TUN)
- channel_dont_close(req);
-
- http_resync_states(s);
- if (!(req->analysers & an_bit)) {
- if (unlikely(msg->msg_state == HTTP_MSG_ERROR)) {
- if (req->flags & CF_SHUTW) {
- /* request errors are most likely due to the
- * server aborting the transfer. */
- goto return_srv_abort;
- }
- if (msg->err_pos >= 0)
- http_capture_bad_message(sess->fe, s, msg, msg->err_state, s->be);
- goto return_bad_req;
- }
- return 1;
- }
-
- /* If "option abortonclose" is set on the backend, we want to monitor
- * the client's connection and forward any shutdown notification to the
- * server, which will decide whether to close or to go on processing the
- * request. We only do that in tunnel mode, and not in other modes since
- * it can be abused to exhaust source ports. */
- if (s->be->options & PR_O_ABRT_CLOSE) {
- channel_auto_read(req);
- if ((req->flags & (CF_SHUTR|CF_READ_NULL)) &&
- ((txn->flags & TX_CON_WANT_MSK) != TX_CON_WANT_TUN))
- s->si[1].flags |= SI_FL_NOLINGER;
- channel_auto_close(req);
- }
- else if (s->txn->meth == HTTP_METH_POST) {
- /* POST requests may require to read extra CRLF sent by broken
- * browsers and which could cause an RST to be sent upon close
- * on some systems (eg: Linux). */
- channel_auto_read(req);
- }
- return 0;
-
- missing_data_or_waiting:
- /* stop waiting for data if the input is closed before the end */
- if (msg->msg_state < HTTP_MSG_ENDING && req->flags & CF_SHUTR)
- goto return_cli_abort;
-
- waiting:
- /* waiting for the last bits to leave the buffer */
- if (req->flags & CF_SHUTW)
- goto return_srv_abort;
-
- /* When TE: chunked is used, we need to get there again to parse remaining
- * chunks even if the client has closed, so we don't want to set CF_DONTCLOSE.
- * And when content-length is used, we never want to let the possible
- * shutdown be forwarded to the other side, as the state machine will
- * take care of it once the client responds. It's also important to
- * prevent TIME_WAITs from accumulating on the backend side, and for
- * HTTP/2 where the last frame comes with a shutdown.
- */
- if (msg->flags & (HTTP_MSGF_TE_CHNK|HTTP_MSGF_CNT_LEN))
- channel_dont_close(req);
-
- /* We know that more data are expected, but we couldn't send more that
- * what we did. So we always set the CF_EXPECT_MORE flag so that the
- * system knows it must not set a PUSH on this first part. Interactive
- * modes are already handled by the stream sock layer. We must not do
- * this in content-length mode because it could present the MSG_MORE
- * flag with the last block of forwarded data, which would cause an
- * additional delay to be observed by the receiver.
- */
- if (msg->flags & HTTP_MSGF_TE_CHNK)
- req->flags |= CF_EXPECT_MORE;
-
- return 0;
-
- return_cli_abort:
- _HA_ATOMIC_ADD(&sess->fe->fe_counters.cli_aborts, 1);
- _HA_ATOMIC_ADD(&s->be->be_counters.cli_aborts, 1);
- if (objt_server(s->target))
- _HA_ATOMIC_ADD(&objt_server(s->target)->counters.cli_aborts, 1);
- if (!(s->flags & SF_ERR_MASK))
- s->flags |= SF_ERR_CLICL;
- status = 400;
- goto return_error;
-
- return_srv_abort:
- _HA_ATOMIC_ADD(&sess->fe->fe_counters.srv_aborts, 1);
- _HA_ATOMIC_ADD(&s->be->be_counters.srv_aborts, 1);
- if (objt_server(s->target))
- _HA_ATOMIC_ADD(&objt_server(s->target)->counters.srv_aborts, 1);
- if (!(s->flags & SF_ERR_MASK))
- s->flags |= SF_ERR_SRVCL;
- status = 502;
- goto return_error;
-
- return_bad_req: /* let's centralize all bad requests */
- _HA_ATOMIC_ADD(&sess->fe->fe_counters.failed_req, 1);
- if (sess->listener->counters)
- _HA_ATOMIC_ADD(&sess->listener->counters->failed_req, 1);
- if (!(s->flags & SF_ERR_MASK))
- s->flags |= SF_ERR_CLICL;
- status = 400;
-
- return_error:
- txn->req.err_state = txn->req.msg_state;
- txn->req.msg_state = HTTP_MSG_ERROR;
- if (txn->status > 0) {
- /* Note: we don't send any error if some data were already sent */
- http_reply_and_close(s, txn->status, NULL);
- } else {
- txn->status = status;
- http_reply_and_close(s, txn->status, http_error_message(s));
- }
- req->analysers &= AN_REQ_FLT_END;
- s->res.analysers &= AN_RES_FLT_END; /* we're in data phase, we want to abort both directions */
- if (!(s->flags & SF_FINST_MASK))
- s->flags |= ((txn->rsp.msg_state < HTTP_MSG_ERROR) ? SF_FINST_H : SF_FINST_D);
- return 0;
-}
-
-/* This stream analyser waits for a complete HTTP response. It returns 1 if the
- * processing can continue on next analysers, or zero if it either needs more
- * data or wants to immediately abort the response (eg: timeout, error, ...). It
- * is tied to AN_RES_WAIT_HTTP and may may remove itself from s->res.analysers
- * when it has nothing left to do, and may remove any analyser when it wants to
- * abort.
- */
-int http_wait_for_response(struct stream *s, struct channel *rep, int an_bit)
-{
- struct session *sess = s->sess;
- struct http_txn *txn = s->txn;
- struct http_msg *msg = &txn->rsp;
- struct hdr_ctx ctx;
- struct connection *srv_conn;
- int use_close_only;
- int cur_idx;
- int n;
-
- srv_conn = cs_conn(objt_cs(s->si[1].end));
-
- if (IS_HTX_STRM(s))
- return htx_wait_for_response(s, rep, an_bit);
-
- DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%lu analysers=%02x\n",
- now_ms, __FUNCTION__,
- s,
- rep,
- rep->rex, rep->wex,
- rep->flags,
- ci_data(rep),
- rep->analysers);
-
- /*
- * Now parse the partial (or complete) lines.
- * We will check the response syntax, and also join multi-line
- * headers. An index of all the lines will be elaborated while
- * parsing.
- *
- * For the parsing, we use a 28 states FSM.
- *
- * Here is the information we currently have :
- * ci_head(rep) = beginning of response
- * ci_head(rep) + msg->eoh = end of processed headers / start of current one
- * ci_tail(rep) = end of input data
- * msg->eol = end of current header or line (LF or CRLF)
- * msg->next = first non-visited byte
- */
-
- next_one:
- /* There's a protected area at the end of the buffer for rewriting
- * purposes. We don't want to start to parse the request if the
- * protected area is affected, because we may have to move processed
- * data later, which is much more complicated.
- */
- if (c_data(rep) && msg->msg_state < HTTP_MSG_ERROR) {
- if (unlikely(!channel_is_rewritable(rep))) {
- /* some data has still not left the buffer, wake us once that's done */
- if (rep->flags & (CF_SHUTW|CF_SHUTW_NOW|CF_WRITE_ERROR|CF_WRITE_TIMEOUT))
- goto abort_response;
- channel_dont_close(rep);
- rep->flags |= CF_READ_DONTWAIT; /* try to get back here ASAP */
- rep->flags |= CF_WAKE_WRITE;
- return 0;
- }
-
- if (unlikely(ci_tail(rep) < c_ptr(rep, msg->next) ||
- ci_tail(rep) > b_wrap(&rep->buf) - global.tune.maxrewrite))
- channel_slow_realign(rep, trash.area);
-
- if (likely(msg->next < ci_data(rep)))
- http_msg_analyzer(msg, &txn->hdr_idx);
- }
-
- /* 1: we might have to print this header in debug mode */
- if (unlikely((global.mode & MODE_DEBUG) &&
- (!(global.mode & MODE_QUIET) || (global.mode & MODE_VERBOSE)) &&
- msg->msg_state >= HTTP_MSG_BODY)) {
- char *eol, *sol;
-
- sol = ci_head(rep);
- eol = sol + (msg->sl.st.l ? msg->sl.st.l : ci_data(rep));
- debug_hdr("srvrep", s, sol, eol);
-
- sol += hdr_idx_first_pos(&txn->hdr_idx);
- cur_idx = hdr_idx_first_idx(&txn->hdr_idx);
-
- while (cur_idx) {
- eol = sol + txn->hdr_idx.v[cur_idx].len;
- debug_hdr("srvhdr", s, sol, eol);
- sol = eol + txn->hdr_idx.v[cur_idx].cr + 1;
- cur_idx = txn->hdr_idx.v[cur_idx].next;
- }
- }
-
- /*
- * Now we quickly check if we have found a full valid response.
- * If not so, we check the FD and buffer states before leaving.
- * A full response is indicated by the fact that we have seen
- * the double LF/CRLF, so the state is >= HTTP_MSG_BODY. Invalid
- * responses are checked first.
- *
- * Depending on whether the client is still there or not, we
- * may send an error response back or not. Note that normally
- * we should only check for HTTP status there, and check I/O
- * errors somewhere else.
- */
-
- if (unlikely(msg->msg_state < HTTP_MSG_BODY)) {
- /* Invalid response */
- if (unlikely(msg->msg_state == HTTP_MSG_ERROR)) {
- /* we detected a parsing error. We want to archive this response
- * in the dedicated proxy area for later troubleshooting.
- */
- hdr_response_bad:
- if (msg->msg_state == HTTP_MSG_ERROR || msg->err_pos >= 0)
- http_capture_bad_message(s->be, s, msg, msg->err_state, sess->fe);
-
- _HA_ATOMIC_ADD(&s->be->be_counters.failed_resp, 1);
- if (objt_server(s->target)) {
- _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.failed_resp, 1);
- health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_HDRRSP);
- }
- abort_response:
- channel_auto_close(rep);
- rep->analysers &= AN_RES_FLT_END;
- txn->status = 502;
- s->si[1].flags |= SI_FL_NOLINGER;
- channel_truncate(rep);
- http_reply_and_close(s, txn->status, http_error_message(s));
-
- if (!(s->flags & SF_ERR_MASK))
- s->flags |= SF_ERR_PRXCOND;
- if (!(s->flags & SF_FINST_MASK))
- s->flags |= SF_FINST_H;
-
- return 0;
- }
-
- /* too large response does not fit in buffer. */
- else if (channel_full(rep, global.tune.maxrewrite)) {
- if (msg->err_pos < 0)
- msg->err_pos = ci_data(rep);
- goto hdr_response_bad;
- }
-
- /* read error */
- else if (rep->flags & CF_READ_ERROR) {
- if (msg->err_pos >= 0)
- http_capture_bad_message(s->be, s, msg, msg->err_state, sess->fe);
- else if (txn->flags & TX_NOT_FIRST)
- goto abort_keep_alive;
-
- _HA_ATOMIC_ADD(&s->be->be_counters.failed_resp, 1);
- if (objt_server(s->target)) {
- _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.failed_resp, 1);
- health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_READ_ERROR);
- }
-
- channel_auto_close(rep);
- rep->analysers &= AN_RES_FLT_END;
- txn->status = 502;
-
- /* Check to see if the server refused the early data.
- * If so, just send a 425
- */
- if (objt_cs(s->si[1].end)) {
- struct connection *conn = objt_cs(s->si[1].end)->conn;
-
- if (conn->err_code == CO_ER_SSL_EARLY_FAILED)
- txn->status = 425;
- }
-
- s->si[1].flags |= SI_FL_NOLINGER;
- channel_truncate(rep);
- http_reply_and_close(s, txn->status, http_error_message(s));
-
- if (!(s->flags & SF_ERR_MASK))
- s->flags |= SF_ERR_SRVCL;
- if (!(s->flags & SF_FINST_MASK))
- s->flags |= SF_FINST_H;
- return 0;
- }
-
- /* read timeout : return a 504 to the client. */
- else if (rep->flags & CF_READ_TIMEOUT) {
- if (msg->err_pos >= 0)
- http_capture_bad_message(s->be, s, msg, msg->err_state, sess->fe);
-
- _HA_ATOMIC_ADD(&s->be->be_counters.failed_resp, 1);
- if (objt_server(s->target)) {
- _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.failed_resp, 1);
- health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_READ_TIMEOUT);
- }
-
- channel_auto_close(rep);
- rep->analysers &= AN_RES_FLT_END;
- txn->status = 504;
- s->si[1].flags |= SI_FL_NOLINGER;
- channel_truncate(rep);
- http_reply_and_close(s, txn->status, http_error_message(s));
-
- if (!(s->flags & SF_ERR_MASK))
- s->flags |= SF_ERR_SRVTO;
- if (!(s->flags & SF_FINST_MASK))
- s->flags |= SF_FINST_H;
- return 0;
- }
-
- /* client abort with an abortonclose */
- else if ((rep->flags & CF_SHUTR) && ((s->req.flags & (CF_SHUTR|CF_SHUTW)) == (CF_SHUTR|CF_SHUTW))) {
- _HA_ATOMIC_ADD(&sess->fe->fe_counters.cli_aborts, 1);
- _HA_ATOMIC_ADD(&s->be->be_counters.cli_aborts, 1);
- if (objt_server(s->target))
- _HA_ATOMIC_ADD(&objt_server(s->target)->counters.cli_aborts, 1);
-
- rep->analysers &= AN_RES_FLT_END;
- channel_auto_close(rep);
-
- txn->status = 400;
- channel_truncate(rep);
- http_reply_and_close(s, txn->status, http_error_message(s));
-
- if (!(s->flags & SF_ERR_MASK))
- s->flags |= SF_ERR_CLICL;
- if (!(s->flags & SF_FINST_MASK))
- s->flags |= SF_FINST_H;
-
- /* process_stream() will take care of the error */
- return 0;
- }
-
- /* close from server, capture the response if the server has started to respond */
- else if (rep->flags & CF_SHUTR) {
- if (msg->msg_state >= HTTP_MSG_RPVER || msg->err_pos >= 0)
- http_capture_bad_message(s->be, s, msg, msg->err_state, sess->fe);
- else if (txn->flags & TX_NOT_FIRST)
- goto abort_keep_alive;
-
- _HA_ATOMIC_ADD(&s->be->be_counters.failed_resp, 1);
- if (objt_server(s->target)) {
- _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.failed_resp, 1);
- health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_BROKEN_PIPE);
- }
-
- channel_auto_close(rep);
- rep->analysers &= AN_RES_FLT_END;
- txn->status = 502;
- s->si[1].flags |= SI_FL_NOLINGER;
- channel_truncate(rep);
- http_reply_and_close(s, txn->status, http_error_message(s));
-
- if (!(s->flags & SF_ERR_MASK))
- s->flags |= SF_ERR_SRVCL;
- if (!(s->flags & SF_FINST_MASK))
- s->flags |= SF_FINST_H;
- return 0;
- }
-
- /* write error to client (we don't send any message then) */
- else if (rep->flags & CF_WRITE_ERROR) {
- if (msg->err_pos >= 0)
- http_capture_bad_message(s->be, s, msg, msg->err_state, sess->fe);
- else if (txn->flags & TX_NOT_FIRST)
- goto abort_keep_alive;
-
- _HA_ATOMIC_ADD(&s->be->be_counters.failed_resp, 1);
- rep->analysers &= AN_RES_FLT_END;
- channel_auto_close(rep);
-
- if (!(s->flags & SF_ERR_MASK))
- s->flags |= SF_ERR_CLICL;
- if (!(s->flags & SF_FINST_MASK))
- s->flags |= SF_FINST_H;
-
- /* process_stream() will take care of the error */
- return 0;
- }
-
- channel_dont_close(rep);
- rep->flags |= CF_READ_DONTWAIT; /* try to get back here ASAP */
- return 0;
- }
-
- /* More interesting part now : we know that we have a complete
- * response which at least looks like HTTP. We have an indicator
- * of each header's length, so we can parse them quickly.
- */
-
- if (unlikely(msg->err_pos >= 0))
- http_capture_bad_message(s->be, s, msg, msg->err_state, sess->fe);
-
- /*
- * 1: get the status code
- */
- n = ci_head(rep)[msg->sl.st.c] - '0';
- if (n < 1 || n > 5)
- n = 0;
- /* when the client triggers a 4xx from the server, it's most often due
- * to a missing object or permission. These events should be tracked
- * because if they happen often, it may indicate a brute force or a
- * vulnerability scan.
- */
- if (n == 4)
- stream_inc_http_err_ctr(s);
-
- if (objt_server(s->target))
- _HA_ATOMIC_ADD(&objt_server(s->target)->counters.p.http.rsp[n], 1);
-
- /* RFC7230#2.6 has enforced the format of the HTTP version string to be
- * exactly one digit "." one digit. This check may be disabled using
- * option accept-invalid-http-response.
- */
- if (!(s->be->options2 & PR_O2_RSPBUG_OK)) {
- if (msg->sl.st.v_l != 8) {
- msg->err_pos = 0;
- goto hdr_response_bad;
- }
-
- if (ci_head(rep)[4] != '/' ||
- !isdigit((unsigned char)ci_head(rep)[5]) ||
- ci_head(rep)[6] != '.' ||
- !isdigit((unsigned char)ci_head(rep)[7])) {
- msg->err_pos = 4;
- goto hdr_response_bad;
- }
- }
-
- /* check if the response is HTTP/1.1 or above */
- if ((msg->sl.st.v_l == 8) &&
- ((ci_head(rep)[5] > '1') ||
- ((ci_head(rep)[5] == '1') && (ci_head(rep)[7] >= '1'))))
- msg->flags |= HTTP_MSGF_VER_11;
-
- /* "connection" has not been parsed yet */
- txn->flags &= ~(TX_HDR_CONN_PRS|TX_HDR_CONN_CLO|TX_HDR_CONN_KAL|TX_HDR_CONN_UPG|TX_CON_CLO_SET|TX_CON_KAL_SET);
-
- /* transfer length unknown*/
- msg->flags &= ~HTTP_MSGF_XFER_LEN;
-
- txn->status = strl2ui(ci_head(rep) + msg->sl.st.c, msg->sl.st.c_l);
-
- /* Adjust server's health based on status code. Note: status codes 501
- * and 505 are triggered on demand by client request, so we must not
- * count them as server failures.
- */
- if (objt_server(s->target)) {
- if (txn->status >= 100 && (txn->status < 500 || txn->status == 501 || txn->status == 505))
- health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_OK);
- else
- health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_STS);
- }
-
- /*
- * We may be facing a 100-continue response, or any other informational
- * 1xx response which is non-final, in which case this is not the right
- * response, and we're waiting for the next one. Let's allow this response
- * to go to the client and wait for the next one. There's an exception for
- * 101 which is used later in the code to switch protocols.
- */
- if (txn->status < 200 &&
- (txn->status == 100 || txn->status >= 102)) {
- hdr_idx_init(&txn->hdr_idx);
- msg->next -= channel_forward(rep, msg->next);
- msg->msg_state = HTTP_MSG_RPBEFORE;
- txn->status = 0;
- s->logs.t_data = -1; /* was not a response yet */
- FLT_STRM_CB(s, flt_http_reset(s, msg));
- goto next_one;
- }
-
- /*
- * 2: check for cacheability.
- */
-
- switch (txn->status) {
- case 200:
- case 203:
- case 204:
- case 206:
- case 300:
- case 301:
- case 404:
- case 405:
- case 410:
- case 414:
- case 501:
- break;
- default:
- /* RFC7231#6.1:
- * Responses with status codes that are defined as
- * cacheable by default (e.g., 200, 203, 204, 206,
- * 300, 301, 404, 405, 410, 414, and 501 in this
- * specification) can be reused by a cache with
- * heuristic expiration unless otherwise indicated
- * by the method definition or explicit cache
- * controls [RFC7234]; all other status codes are
- * not cacheable by default.
- */
- txn->flags &= ~(TX_CACHEABLE | TX_CACHE_COOK);
- break;
- }
-
- /*
- * 3: we may need to capture headers
- */
- s->logs.logwait &= ~LW_RESP;
- if (unlikely((s->logs.logwait & LW_RSPHDR) && s->res_cap))
- http_capture_headers(ci_head(rep), &txn->hdr_idx,
- s->res_cap, sess->fe->rsp_cap);
-
- /* 4: determine the transfer-length according to RFC2616 #4.4, updated
- * by RFC7230#3.3.3 :
- *
- * The length of a message body is determined by one of the following
- * (in order of precedence):
- *
- * 1. Any 2xx (Successful) response to a CONNECT request implies that
- * the connection will become a tunnel immediately after the empty
- * line that concludes the header fields. A client MUST ignore
- * any Content-Length or Transfer-Encoding header fields received
- * in such a message. Any 101 response (Switching Protocols) is
- * managed in the same manner.
- *
- * 2. Any response to a HEAD request and any response with a 1xx
- * (Informational), 204 (No Content), or 304 (Not Modified) status
- * code is always terminated by the first empty line after the
- * header fields, regardless of the header fields present in the
- * message, and thus cannot contain a message body.
- *
- * 3. If a Transfer-Encoding header field is present and the chunked
- * transfer coding (Section 4.1) is the final encoding, the message
- * body length is determined by reading and decoding the chunked
- * data until the transfer coding indicates the data is complete.
- *
- * If a Transfer-Encoding header field is present in a response and
- * the chunked transfer coding is not the final encoding, the
- * message body length is determined by reading the connection until
- * it is closed by the server. If a Transfer-Encoding header field
- * is present in a request and the chunked transfer coding is not
- * the final encoding, the message body length cannot be determined
- * reliably; the server MUST respond with the 400 (Bad Request)
- * status code and then close the connection.
- *
- * If a message is received with both a Transfer-Encoding and a
- * Content-Length header field, the Transfer-Encoding overrides the
- * Content-Length. Such a message might indicate an attempt to
- * perform request smuggling (Section 9.5) or response splitting
- * (Section 9.4) and ought to be handled as an error. A sender MUST
- * remove the received Content-Length field prior to forwarding such
- * a message downstream.
- *
- * 4. If a message is received without Transfer-Encoding and with
- * either multiple Content-Length header fields having differing
- * field-values or a single Content-Length header field having an
- * invalid value, then the message framing is invalid and the
- * recipient MUST treat it as an unrecoverable error. If this is a
- * request message, the server MUST respond with a 400 (Bad Request)
- * status code and then close the connection. If this is a response
- * message received by a proxy, the proxy MUST close the connection
- * to the server, discard the received response, and send a 502 (Bad
- * Gateway) response to the client. If this is a response message
- * received by a user agent, the user agent MUST close the
- * connection to the server and discard the received response.
- *
- * 5. If a valid Content-Length header field is present without
- * Transfer-Encoding, its decimal value defines the expected message
- * body length in octets. If the sender closes the connection or
- * the recipient times out before the indicated number of octets are
- * received, the recipient MUST consider the message to be
- * incomplete and close the connection.
- *
- * 6. If this is a request message and none of the above are true, then
- * the message body length is zero (no message body is present).
- *
- * 7. Otherwise, this is a response message without a declared message
- * body length, so the message body length is determined by the
- * number of octets received prior to the server closing the
- * connection.
- */
-
- /* Skip parsing if no content length is possible. The response flags
- * remain 0 as well as the chunk_len, which may or may not mirror
- * the real header value, and we note that we know the response's length.
- * FIXME: should we parse anyway and return an error on chunked encoding ?
- */
- if (unlikely((txn->meth == HTTP_METH_CONNECT && txn->status == 200) ||
- txn->status == 101)) {
- /* Either we've established an explicit tunnel, or we're
- * switching the protocol. In both cases, we're very unlikely
- * to understand the next protocols. We have to switch to tunnel
- * mode, so that we transfer the request and responses then let
- * this protocol pass unmodified. When we later implement specific
- * parsers for such protocols, we'll want to check the Upgrade
- * header which contains information about that protocol for
- * responses with status 101 (eg: see RFC2817 about TLS).
- */
- txn->flags = (txn->flags & ~TX_CON_WANT_MSK) | TX_CON_WANT_TUN;
- msg->flags |= HTTP_MSGF_XFER_LEN;
- goto end;
- }
-
- if (txn->meth == HTTP_METH_HEAD ||
- (txn->status >= 100 && txn->status < 200) ||
- txn->status == 204 || txn->status == 304) {
- msg->flags |= HTTP_MSGF_XFER_LEN;
- goto skip_content_length;
- }
-
- use_close_only = 0;
- ctx.idx = 0;
- while (http_find_header2("Transfer-Encoding", 17, ci_head(rep), &txn->hdr_idx, &ctx)) {
- if (ctx.vlen == 7 && strncasecmp(ctx.line + ctx.val, "chunked", 7) == 0)
- msg->flags |= (HTTP_MSGF_TE_CHNK | HTTP_MSGF_XFER_LEN);
- else if (msg->flags & HTTP_MSGF_TE_CHNK) {
- /* bad transfer-encoding (chunked followed by something else) */
- use_close_only = 1;
- msg->flags &= ~(HTTP_MSGF_TE_CHNK | HTTP_MSGF_XFER_LEN);
- break;
- }
- }
-
- /* Chunked responses must have their content-length removed */
- ctx.idx = 0;
- if (use_close_only || (msg->flags & HTTP_MSGF_TE_CHNK)) {
- while (http_find_header2("Content-Length", 14, ci_head(rep), &txn->hdr_idx, &ctx))
- http_remove_header2(msg, &txn->hdr_idx, &ctx);
- }
- else while (http_find_header2("Content-Length", 14, ci_head(rep), &txn->hdr_idx, &ctx)) {
- signed long long cl;
-
- if (!ctx.vlen) {
- msg->err_pos = ctx.line + ctx.val - ci_head(rep);
- goto hdr_response_bad;
- }
-
- if (strl2llrc(ctx.line + ctx.val, ctx.vlen, &cl)) {
- msg->err_pos = ctx.line + ctx.val - ci_head(rep);
- goto hdr_response_bad; /* parse failure */
- }
-
- if (cl < 0) {
- msg->err_pos = ctx.line + ctx.val - ci_head(rep);
- goto hdr_response_bad;
- }
-
- if ((msg->flags & HTTP_MSGF_CNT_LEN) && (msg->chunk_len != cl)) {
- msg->err_pos = ctx.line + ctx.val - ci_head(rep);
- goto hdr_response_bad; /* already specified, was different */
- }
-
- msg->flags |= HTTP_MSGF_CNT_LEN | HTTP_MSGF_XFER_LEN;
- msg->body_len = msg->chunk_len = cl;
- }
-
- /* check for NTML authentication headers in 401 (WWW-Authenticate) and
- * 407 (Proxy-Authenticate) responses and set the connection to private
- */
- if (srv_conn && txn->status == 401) {
- /* check for Negotiate/NTLM WWW-Authenticate headers */
- ctx.idx = 0;
- while (http_find_header2("WWW-Authenticate", 16, ci_head(rep), &txn->hdr_idx, &ctx)) {
- if ((ctx.vlen >= 9 && word_match(ctx.line + ctx.val, ctx.vlen, "Negotiate", 9)) ||
- (ctx.vlen >= 4 && word_match(ctx.line + ctx.val, ctx.vlen, "NTLM", 4)))
- srv_conn->flags |= CO_FL_PRIVATE;
- }
- } else if (srv_conn && txn->status == 407) {
- /* check for Negotiate/NTLM Proxy-Authenticate headers */
- ctx.idx = 0;
- while (http_find_header2("Proxy-Authenticate", 18, ci_head(rep), &txn->hdr_idx, &ctx)) {
- if ((ctx.vlen >= 9 && word_match(ctx.line + ctx.val, ctx.vlen, "Negotiate", 9)) ||
- (ctx.vlen >= 4 && word_match(ctx.line + ctx.val, ctx.vlen, "NTLM", 4)))
- srv_conn->flags |= CO_FL_PRIVATE;
- }
- }
-
- skip_content_length:
- /* Now we have to check if we need to modify the Connection header.
- * This is more difficult on the response than it is on the request,
- * because we can have two different HTTP versions and we don't know
- * how the client will interprete a response. For instance, let's say
- * that the client sends a keep-alive request in HTTP/1.0 and gets an
- * HTTP/1.1 response without any header. Maybe it will bound itself to
- * HTTP/1.0 because it only knows about it, and will consider the lack
- * of header as a close, or maybe it knows HTTP/1.1 and can consider
- * the lack of header as a keep-alive. Thus we will use two flags
- * indicating how a request MAY be understood by the client. In case
- * of multiple possibilities, we'll fix the header to be explicit. If
- * ambiguous cases such as both close and keepalive are seen, then we
- * will fall back to explicit close. Note that we won't take risks with
- * HTTP/1.0 clients which may not necessarily understand keep-alive.
- * See doc/internals/connection-header.txt for the complete matrix.
- */
- if ((txn->status >= 200) && !(txn->flags & TX_HDR_CONN_PRS) &&
- (txn->flags & TX_CON_WANT_MSK) != TX_CON_WANT_TUN) {
- int to_del = 0;
-
- /* on unknown transfer length, we must close */
- if (!(msg->flags & HTTP_MSGF_XFER_LEN))
- txn->flags = (txn->flags & ~TX_CON_WANT_MSK) | TX_CON_WANT_CLO;
-
- /* now adjust header transformations depending on current state */
- if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_CLO) {
- to_del |= 2; /* remove "keep-alive" on any response */
- if (!(msg->flags & HTTP_MSGF_VER_11))
- to_del |= 1; /* remove "close" for HTTP/1.0 responses */
- }
- else { /* SCL / KAL */
- to_del |= 1; /* remove "close" on any response */
- if (txn->req.flags & msg->flags & HTTP_MSGF_VER_11)
- to_del |= 2; /* remove "keep-alive" on pure 1.1 responses */
- }
-
- /* Parse and remove some headers from the connection header */
- http_parse_connection_header(txn, msg, to_del);
-
- /* Some keep-alive responses are converted to Server-close if
- * the server wants to close.
- */
- if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_KAL) {
- if ((txn->flags & TX_HDR_CONN_CLO) ||
- (!(txn->flags & TX_HDR_CONN_KAL) && !(msg->flags & HTTP_MSGF_VER_11)))
- txn->flags = (txn->flags & ~TX_CON_WANT_MSK) | TX_CON_WANT_SCL;
- }
- }
-
- end:
- /* we want to have the response time before we start processing it */
- s->logs.t_data = tv_ms_elapsed(&s->logs.tv_accept, &now);
-
- /* end of job, return OK */
- rep->analysers &= ~an_bit;
- rep->analyse_exp = TICK_ETERNITY;
- channel_auto_close(rep);
- return 1;
-
- abort_keep_alive:
- /* A keep-alive request to the server failed on a network error.
- * The client is required to retry. We need to close without returning
- * any other information so that the client retries.
- */
- txn->status = 0;
- rep->analysers &= AN_RES_FLT_END;
- s->req.analysers &= AN_REQ_FLT_END;
- channel_auto_close(rep);
- s->logs.logwait = 0;
- s->logs.level = 0;
- s->res.flags &= ~CF_EXPECT_MORE; /* speed up sending a previous response */
- channel_truncate(rep);
- http_reply_and_close(s, txn->status, NULL);
- return 0;
-}
-
-/* This function performs all the processing enabled for the current response.
- * It normally returns 1 unless it wants to break. It relies on buffers flags,
- * and updates s->res.analysers. It might make sense to explode it into several
- * other functions. It works like process_request (see indications above).
- */
-int http_process_res_common(struct stream *s, struct channel *rep, int an_bit, struct proxy *px)
-{
- struct session *sess = s->sess;
- struct http_txn *txn = s->txn;
- struct http_msg *msg = &txn->rsp;
- struct proxy *cur_proxy;
- struct cond_wordlist *wl;
- enum rule_result ret = HTTP_RULE_RES_CONT;
-
- if (IS_HTX_STRM(s))
- return htx_process_res_common(s, rep, an_bit, px);
-
- DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%lu analysers=%02x\n",
- now_ms, __FUNCTION__,
- s,
- rep,
- rep->rex, rep->wex,
- rep->flags,
- ci_data(rep),
- rep->analysers);
-
- if (unlikely(msg->msg_state < HTTP_MSG_BODY)) /* we need more data */
- return 0;
-
- /* The stats applet needs to adjust the Connection header but we don't
- * apply any filter there.
- */
- if (unlikely(objt_applet(s->target) == &http_stats_applet)) {
- rep->analysers &= ~an_bit;
- rep->analyse_exp = TICK_ETERNITY;
- goto skip_filters;
- }
-
- /*
- * We will have to evaluate the filters.
- * As opposed to version 1.2, now they will be evaluated in the
- * filters order and not in the header order. This means that
- * each filter has to be validated among all headers.
- *
- * Filters are tried with ->be first, then with ->fe if it is
- * different from ->be.
- *
- * Maybe we are in resume condiion. In this case I choose the
- * "struct proxy" which contains the rule list matching the resume
- * pointer. If none of theses "struct proxy" match, I initialise
- * the process with the first one.
- *
- * In fact, I check only correspondance betwwen the current list
- * pointer and the ->fe rule list. If it doesn't match, I initialize
- * the loop with the ->be.
- */
- if (s->current_rule_list == &sess->fe->http_res_rules)
- cur_proxy = sess->fe;
- else
- cur_proxy = s->be;
- while (1) {
- struct proxy *rule_set = cur_proxy;
-
- /* evaluate http-response rules */
- if (ret == HTTP_RULE_RES_CONT) {
- ret = http_res_get_intercept_rule(cur_proxy, &cur_proxy->http_res_rules, s);
-
- if (ret == HTTP_RULE_RES_BADREQ)
- goto return_srv_prx_502;
-
- if (ret == HTTP_RULE_RES_DONE) {
- rep->analysers &= ~an_bit;
- rep->analyse_exp = TICK_ETERNITY;
- return 1;
- }
- }
-
- /* we need to be called again. */
- if (ret == HTTP_RULE_RES_YIELD) {
- channel_dont_close(rep);
- return 0;
- }
-
- /* try headers filters */
- if (rule_set->rsp_exp != NULL) {
- if (apply_filters_to_response(s, rep, rule_set) < 0) {
- return_bad_resp:
- if (objt_server(s->target)) {
- _HA_ATOMIC_ADD(&__objt_server(s->target)->counters.failed_resp, 1);
- health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_RSP);
- }
- _HA_ATOMIC_ADD(&s->be->be_counters.failed_resp, 1);
- return_srv_prx_502:
- rep->analysers &= AN_RES_FLT_END;
- txn->status = 502;
- s->logs.t_data = -1; /* was not a valid response */
- s->si[1].flags |= SI_FL_NOLINGER;
- channel_truncate(rep);
- http_reply_and_close(s, txn->status, http_error_message(s));
- if (!(s->flags & SF_ERR_MASK))
- s->flags |= SF_ERR_PRXCOND;
- if (!(s->flags & SF_FINST_MASK))
- s->flags |= SF_FINST_H;
- return 0;
- }
- }
-
- /* has the response been denied ? */
- if (txn->flags & TX_SVDENY) {
- if (objt_server(s->target))
- _HA_ATOMIC_ADD(&objt_server(s->target)->counters.failed_secu, 1);
-
- _HA_ATOMIC_ADD(&s->be->be_counters.denied_resp, 1);
- _HA_ATOMIC_ADD(&sess->fe->fe_counters.denied_resp, 1);
- if (sess->listener->counters)
- _HA_ATOMIC_ADD(&sess->listener->counters->denied_resp, 1);
-
- goto return_srv_prx_502;
- }
-
- /* add response headers from the rule sets in the same order */
- list_for_each_entry(wl, &rule_set->rsp_add, list) {
- if (txn->status < 200 && txn->status != 101)
- break;
- if (wl->cond) {
- int ret = acl_exec_cond(wl->cond, px, sess, s, SMP_OPT_DIR_RES|SMP_OPT_FINAL);
- ret = acl_pass(ret);
- if (((struct acl_cond *)wl->cond)->pol == ACL_COND_UNLESS)
- ret = !ret;
- if (!ret)
- continue;
- }
- if (unlikely(http_header_add_tail2(&txn->rsp, &txn->hdr_idx, wl->s, strlen(wl->s)) < 0))
- goto return_bad_resp;
- }
-
- /* check whether we're already working on the frontend */
- if (cur_proxy == sess->fe)
- break;
- cur_proxy = sess->fe;
- }
-
- /* After this point, this anayzer can't return yield, so we can
- * remove the bit corresponding to this analyzer from the list.
- *
- * Note that the intermediate returns and goto found previously
- * reset the analyzers.
- */
- rep->analysers &= ~an_bit;
- rep->analyse_exp = TICK_ETERNITY;
-
- /* OK that's all we can do for 1xx responses */
- if (unlikely(txn->status < 200 && txn->status != 101))
- goto skip_header_mangling;
-
- /*
- * Now check for a server cookie.
- */
- if (s->be->cookie_name || sess->fe->capture_name || (s->be->options & PR_O_CHK_CACHE))
- manage_server_side_cookies(s, rep);
-
- /*
- * Check for cache-control or pragma headers if required.
- */
- if ((s->be->options & PR_O_CHK_CACHE) || (s->be->ck_opts & PR_CK_NOC))
- check_response_for_cacheability(s, rep);
-
- /*
- * Add server cookie in the response if needed
- */
- if (objt_server(s->target) && (s->be->ck_opts & PR_CK_INS) &&
- !((txn->flags & TX_SCK_FOUND) && (s->be->ck_opts & PR_CK_PSV)) &&
- (!(s->flags & SF_DIRECT) ||
- ((s->be->cookie_maxidle || txn->cookie_last_date) &&
- (!txn->cookie_last_date || (txn->cookie_last_date - date.tv_sec) < 0)) ||
- (s->be->cookie_maxlife && !txn->cookie_first_date) || // set the first_date
- (!s->be->cookie_maxlife && txn->cookie_first_date)) && // remove the first_date
- (!(s->be->ck_opts & PR_CK_POST) || (txn->meth == HTTP_METH_POST)) &&
- !(s->flags & SF_IGNORE_PRST)) {
- /* the server is known, it's not the one the client requested, or the
- * cookie's last seen date needs to be refreshed. We have to
- * insert a set-cookie here, except if we want to insert only on POST
- * requests and this one isn't. Note that servers which don't have cookies
- * (eg: some backup servers) will return a full cookie removal request.
- */
- if (!objt_server(s->target)->cookie) {
- chunk_printf(&trash,
- "Set-Cookie: %s=; Expires=Thu, 01-Jan-1970 00:00:01 GMT; path=/",
- s->be->cookie_name);
- }
- else {
- chunk_printf(&trash, "Set-Cookie: %s=%s", s->be->cookie_name, objt_server(s->target)->cookie);
-
- if (s->be->cookie_maxidle || s->be->cookie_maxlife) {
- /* emit last_date, which is mandatory */
- trash.area[trash.data++] = COOKIE_DELIM_DATE;
- s30tob64((date.tv_sec+3) >> 2,
- trash.area + trash.data);
- trash.data += 5;
-
- if (s->be->cookie_maxlife) {
- /* emit first_date, which is either the original one or
- * the current date.
- */
- trash.area[trash.data++] = COOKIE_DELIM_DATE;
- s30tob64(txn->cookie_first_date ?
- txn->cookie_first_date >> 2 :
- (date.tv_sec+3) >> 2,
- trash.area + trash.data);
- trash.data += 5;
- }
- }
- chunk_appendf(&trash, "; path=/");
- }
-
- if (s->be->cookie_domain)
- chunk_appendf(&trash, "; domain=%s", s->be->cookie_domain);
-
- if (s->be->ck_opts & PR_CK_HTTPONLY)
- chunk_appendf(&trash, "; HttpOnly");
-
- if (s->be->ck_opts & PR_CK_SECURE)
- chunk_appendf(&trash, "; Secure");
-
- if (unlikely(http_header_add_tail2(&txn->rsp, &txn->hdr_idx, trash.area, trash.data) < 0))
- goto return_bad_resp;
-
- txn->flags &= ~TX_SCK_MASK;
- if (__objt_server(s->target)->cookie && (s->flags & SF_DIRECT))
- /* the server did not change, only the date was updated */
- txn->flags |= TX_SCK_UPDATED;
- else
- txn->flags |= TX_SCK_INSERTED;
-
- /* Here, we will tell an eventual cache on the client side that we don't
- * want it to cache this reply because HTTP/1.0 caches also cache cookies !
- * Some caches understand the correct form: 'no-cache="set-cookie"', but
- * others don't (eg: apache <= 1.3.26). So we use 'private' instead.
- */
- if ((s->be->ck_opts & PR_CK_NOC) && (txn->flags & TX_CACHEABLE)) {
-
- txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
-
- if (unlikely(http_header_add_tail2(&txn->rsp, &txn->hdr_idx,
- "Cache-control: private", 22) < 0))
- goto return_bad_resp;
- }
- }
-
- /*
- * Check if result will be cacheable with a cookie.
- * We'll block the response if security checks have caught
- * nasty things such as a cacheable cookie.
- */
- if (((txn->flags & (TX_CACHEABLE | TX_CACHE_COOK | TX_SCK_PRESENT)) ==
- (TX_CACHEABLE | TX_CACHE_COOK | TX_SCK_PRESENT)) &&
- (s->be->options & PR_O_CHK_CACHE)) {
- /* we're in presence of a cacheable response containing
- * a set-cookie header. We'll block it as requested by
- * the 'checkcache' option, and send an alert.
- */
- if (objt_server(s->target))
- _HA_ATOMIC_ADD(&objt_server(s->target)->counters.failed_secu, 1);
-
- _HA_ATOMIC_ADD(&s->be->be_counters.denied_resp, 1);
- _HA_ATOMIC_ADD(&sess->fe->fe_counters.denied_resp, 1);
- if (sess->listener->counters)
- _HA_ATOMIC_ADD(&sess->listener->counters->denied_resp, 1);
-
- ha_alert("Blocking cacheable cookie in response from instance %s, server %s.\n",
- s->be->id, objt_server(s->target) ? objt_server(s->target)->id : "<dispatch>");
- send_log(s->be, LOG_ALERT,
- "Blocking cacheable cookie in response from instance %s, server %s.\n",
- s->be->id, objt_server(s->target) ? objt_server(s->target)->id : "<dispatch>");
- goto return_srv_prx_502;
- }
-
- skip_filters:
- /*
- * Adjust "Connection: close" or "Connection: keep-alive" if needed.
- * If an "Upgrade" token is found, the header is left untouched in order
- * not to have to deal with some client bugs : some of them fail an upgrade
- * if anything but "Upgrade" is present in the Connection header. We don't
- * want to touch any 101 response either since it's switching to another
- * protocol.
- */
- if ((txn->status != 101) && !(txn->flags & TX_HDR_CONN_UPG) &&
- (txn->flags & TX_CON_WANT_MSK) != TX_CON_WANT_TUN) {
- unsigned int want_flags = 0;
-
- if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_KAL ||
- (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL) {
- /* we want a keep-alive response here. Keep-alive header
- * required if either side is not 1.1.
- */
- if (!(txn->req.flags & msg->flags & HTTP_MSGF_VER_11))
- want_flags |= TX_CON_KAL_SET;
- }
- else { /* CLO */
- /* we want a close response here. Close header required if
- * the server is 1.1, regardless of the client.
- */
- if (msg->flags & HTTP_MSGF_VER_11)
- want_flags |= TX_CON_CLO_SET;
- }
-
- if (want_flags != (txn->flags & (TX_CON_CLO_SET|TX_CON_KAL_SET)))
- http_change_connection_header(txn, msg, want_flags);
- }
-
- skip_header_mangling:
- /* Always enter in the body analyzer */
- rep->analysers &= ~AN_RES_FLT_XFER_DATA;
- rep->analysers |= AN_RES_HTTP_XFER_BODY;
-
- /* if the user wants to log as soon as possible, without counting
- * bytes from the server, then this is the right moment. We have
- * to temporarily assign bytes_out to log what we currently have.
- */
- if (!LIST_ISEMPTY(&sess->fe->logformat) && !(s->logs.logwait & LW_BYTES)) {
- s->logs.t_close = s->logs.t_data; /* to get a valid end date */
- s->logs.bytes_out = txn->rsp.eoh;
- s->do_log(s);
- s->logs.bytes_out = 0;
- }
- return 1;
-}
-
-/* This function is an analyser which forwards response body (including chunk
- * sizes if any). It is called as soon as we must forward, even if we forward
- * zero byte. The only situation where it must not be called is when we're in
- * tunnel mode and we want to forward till the close. It's used both to forward
- * remaining data and to resync after end of body. It expects the msg_state to
- * be between MSG_BODY and MSG_DONE (inclusive). It returns zero if it needs to
- * read more data, or 1 once we can go on with next request or end the stream.
- *
- * It is capable of compressing response data both in content-length mode and
- * in chunked mode. The state machines follows different flows depending on
- * whether content-length and chunked modes are used, since there are no
- * trailers in content-length :
- *
- * chk-mode cl-mode
- * ,----- BODY -----.
- * / \
- * V size > 0 V chk-mode
- * .--> SIZE -------------> DATA -------------> CRLF
- * | | size == 0 | last byte |
- * | v final crlf v inspected |
- * | TRAILERS -----------> DONE |
- * | |
- * `----------------------------------------------'
- *
- * Compression only happens in the DATA state, and must be flushed in final
- * states (TRAILERS/DONE) or when leaving on missing data. Normal forwarding
- * is performed at once on final states for all bytes parsed, or when leaving
- * on missing data.
- */
-int http_response_forward_body(struct stream *s, struct channel *res, int an_bit)
-{
- struct session *sess = s->sess;
- struct http_txn *txn = s->txn;
- struct http_msg *msg = &s->txn->rsp;
- int ret;
-
- if (IS_HTX_STRM(s))
- return htx_response_forward_body(s, res, an_bit);
-
- DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%lu analysers=%02x\n",
- now_ms, __FUNCTION__,
- s,
- res,
- res->rex, res->wex,
- res->flags,
- ci_data(res),
- res->analysers);
-
- if (unlikely(msg->msg_state < HTTP_MSG_BODY))
- return 0;
-
- if ((res->flags & (CF_READ_ERROR|CF_READ_TIMEOUT|CF_WRITE_ERROR|CF_WRITE_TIMEOUT)) ||
- ((res->flags & CF_SHUTW) && (res->to_forward || co_data(res))) ||
- !s->req.analysers) {
- /* Output closed while we were sending data. We must abort and
- * wake the other side up.
- */
- msg->err_state = msg->msg_state;
- msg->msg_state = HTTP_MSG_ERROR;
- http_resync_states(s);
- return 1;
- }
-
- /* in most states, we should abort in case of early close */
- channel_auto_close(res);
-
- if (msg->msg_state == HTTP_MSG_BODY) {
- msg->msg_state = ((msg->flags & HTTP_MSGF_TE_CHNK)
- ? HTTP_MSG_CHUNK_SIZE
- : HTTP_MSG_DATA);
- }
-
- if (res->to_forward) {
- /* We can't process the buffer's contents yet */
- res->flags |= CF_WAKE_WRITE;
- goto missing_data_or_waiting;
- }
-
- if (msg->msg_state < HTTP_MSG_DONE) {
- ret = ((msg->flags & HTTP_MSGF_TE_CHNK)
- ? http_msg_forward_chunked_body(s, msg)
- : http_msg_forward_body(s, msg));
- if (!ret)
- goto missing_data_or_waiting;
- if (ret < 0)
- goto return_bad_res;
- }
-
- /* other states, DONE...TUNNEL */
- /* for keep-alive we don't want to forward closes on DONE */
- if ((txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_KAL ||
- (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL)
- channel_dont_close(res);
-
- http_resync_states(s);
- if (!(res->analysers & an_bit)) {
- if (unlikely(msg->msg_state == HTTP_MSG_ERROR)) {
- if (res->flags & CF_SHUTW) {
- /* response errors are most likely due to the
- * client aborting the transfer. */
- goto return_cli_abort;
- }
- if (msg->err_pos >= 0)
- http_capture_bad_message(s->be, s, msg, msg->err_state, strm_fe(s));
- goto return_bad_res;
- }
- return 1;
- }
- return 0;
-
- missing_data_or_waiting:
- if (res->flags & CF_SHUTW)
- goto return_cli_abort;
-
- /* stop waiting for data if the input is closed before the end. If the
- * client side was already closed, it means that the client has aborted,
- * so we don't want to count this as a server abort. Otherwise it's a
- * server abort.
- */
- if (msg->msg_state < HTTP_MSG_ENDING && res->flags & CF_SHUTR) {
- if ((s->req.flags & (CF_SHUTR|CF_SHUTW)) == (CF_SHUTR|CF_SHUTW))
- goto return_cli_abort;
- /* If we have some pending data, we continue the processing */
- if (!ci_data(res))
- goto return_srv_abort;
- }
-
- /* we need to obey the req analyser, so if it leaves, we must too */
- if (!s->req.analysers)
- goto return_bad_res;
-
- /* When TE: chunked is used, we need to get there again to parse
- * remaining chunks even if the server has closed, so we don't want to
- * set CF_DONTCLOSE. Similarly, if keep-alive is set on the client side
- * or if there are filters registered on the stream, we don't want to
- * forward a close
- */
- if ((msg->flags & HTTP_MSGF_TE_CHNK) ||
- HAS_DATA_FILTERS(s, res) ||
- (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_KAL ||
- (txn->flags & TX_CON_WANT_MSK) == TX_CON_WANT_SCL)
- channel_dont_close(res);
-
- /* We know that more data are expected, but we couldn't send more that
- * what we did. So we always set the CF_EXPECT_MORE flag so that the
- * system knows it must not set a PUSH on this first part. Interactive
- * modes are already handled by the stream sock layer. We must not do
- * this in content-length mode because it could present the MSG_MORE
- * flag with the last block of forwarded data, which would cause an
- * additional delay to be observed by the receiver.
- */
- if ((msg->flags & HTTP_MSGF_TE_CHNK) || (msg->flags & HTTP_MSGF_COMPRESSING))
- res->flags |= CF_EXPECT_MORE;
-
- /* the stream handler will take care of timeouts and errors */
- return 0;
-
- return_srv_abort:
- _HA_ATOMIC_ADD(&sess->fe->fe_counters.srv_aborts, 1);
- _HA_ATOMIC_ADD(&s->be->be_counters.srv_aborts, 1);
- if (objt_server(s->target))
- _HA_ATOMIC_ADD(&objt_server(s->target)->counters.srv_aborts, 1);
- if (!(s->flags & SF_ERR_MASK))
- s->flags |= SF_ERR_SRVCL;
- goto return_error;
-
- return_cli_abort:
- _HA_ATOMIC_ADD(&sess->fe->fe_counters.cli_aborts, 1);
- _HA_ATOMIC_ADD(&s->be->be_counters.cli_aborts, 1);
- if (objt_server(s->target))
- _HA_ATOMIC_ADD(&objt_server(s->target)->counters.cli_aborts, 1);
- if (!(s->flags & SF_ERR_MASK))
- s->flags |= SF_ERR_CLICL;
- goto return_error;
-
- return_bad_res:
- _HA_ATOMIC_ADD(&s->be->be_counters.failed_resp, 1);
- if (objt_server(s->target)) {
- _HA_ATOMIC_ADD(&objt_server(s->target)->counters.failed_resp, 1);
- health_adjust(__objt_server(s->target), HANA_STATUS_HTTP_RSP);
- }
- if (!(s->flags & SF_ERR_MASK))
- s->flags |= SF_ERR_SRVCL;
-
- return_error:
- txn->rsp.err_state = txn->rsp.msg_state;
- txn->rsp.msg_state = HTTP_MSG_ERROR;
- /* don't send any error message as we're in the body */
- http_reply_and_close(s, txn->status, NULL);
- res->analysers &= AN_RES_FLT_END;
- s->req.analysers &= AN_REQ_FLT_END; /* we're in data phase, we want to abort both directions */
- if (!(s->flags & SF_FINST_MASK))
- s->flags |= SF_FINST_D;
- return 0;
-}
-
-
-int http_msg_forward_body(struct stream *s, struct http_msg *msg)
-{
- struct channel *chn = msg->chn;
- int ret;
-
- /* Here we have the guarantee to be in HTTP_MSG_DATA or HTTP_MSG_ENDING state */
-
- if (msg->msg_state == HTTP_MSG_ENDING)
- goto ending;
-
- /* Neither content-length, nor transfer-encoding was found, so we must
- * read the body until the server connection is closed. In that case, we
- * eat data as they come. Of course, this happens for response only. */
- if (!(msg->flags & HTTP_MSGF_XFER_LEN)) {
- unsigned long long len = ci_data(chn) - msg->next;
- msg->chunk_len += len;
- msg->body_len += len;
- }
- ret = FLT_STRM_DATA_CB(s, chn, flt_http_data(s, msg),
- /* default_ret */ MIN(msg->chunk_len, ci_data(chn) - msg->next),
- /* on_error */ goto error);
- msg->next += ret;
- msg->chunk_len -= ret;
- if (msg->chunk_len) {
- /* input empty or output full */
- if (ci_data(chn) > msg->next)
- chn->flags |= CF_WAKE_WRITE;
- goto missing_data_or_waiting;
- }
-
- /* This check can only be true for a response. HTTP_MSGF_XFER_LEN is
- * always set for a request. */
- if (!(msg->flags & HTTP_MSGF_XFER_LEN)) {
- /* The server still sending data that should be filtered */
- if (!(chn->flags & CF_SHUTR) && HAS_DATA_FILTERS(s, chn))
- goto missing_data_or_waiting;
- msg->msg_state = HTTP_MSG_TUNNEL;
- goto ending;
- }
-
- msg->msg_state = HTTP_MSG_ENDING;
- chn->flags |= CF_EOI;
-
- ending:
- /* we may have some pending data starting at res->buf.p such as a last
- * chunk of data or trailers. */
- ret = FLT_STRM_DATA_CB(s, chn, flt_http_forward_data(s, msg, msg->next),
- /* default_ret */ msg->next,
- /* on_error */ goto error);
- c_adv(chn, ret);
- msg->next -= ret;
- if (unlikely(!(chn->flags & CF_WROTE_DATA) || msg->sov > 0))
- msg->sov -= ret;
- if (msg->next)
- goto waiting;
-
- FLT_STRM_DATA_CB(s, chn, flt_http_end(s, msg),
- /* default_ret */ 1,
- /* on_error */ goto error,
- /* on_wait */ goto waiting);
- if (msg->msg_state == HTTP_MSG_ENDING)
- msg->msg_state = HTTP_MSG_DONE;
- return 1;
-
- missing_data_or_waiting:
- /* we may have some pending data starting at chn->buf.p */
- ret = FLT_STRM_DATA_CB(s, chn, flt_http_forward_data(s, msg, msg->next),
- /* default_ret */ msg->next,
- /* on_error */ goto error);
- c_adv(chn, ret);
- msg->next -= ret;
- if (!(chn->flags & CF_WROTE_DATA) || msg->sov > 0)
- msg->sov -= ret;
- if (!HAS_DATA_FILTERS(s, chn))
- msg->chunk_len -= channel_forward(chn, msg->chunk_len);
- waiting:
- return 0;
- error:
- return -1;
-}
-
-int http_msg_forward_chunked_body(struct stream *s, struct http_msg *msg)
-{
- struct channel *chn = msg->chn;
- unsigned int chunk;
- int ret;
-
- /* Here we have the guarantee to be in one of the following state:
- * HTTP_MSG_DATA, HTTP_MSG_CHUNK_SIZE, HTTP_MSG_CHUNK_CRLF,
- * HTTP_MSG_TRAILERS or HTTP_MSG_ENDING. */
-
- if (msg->msg_state == HTTP_MSG_ENDING)
- goto ending;
-
- /* Don't parse chunks if there is no input data */
- if (!ci_data(chn))
- goto waiting;
-
- switch_states:
- switch (msg->msg_state) {
- case HTTP_MSG_DATA:
- ret = FLT_STRM_DATA_CB(s, chn, flt_http_data(s, msg),
- /* default_ret */ MIN(msg->chunk_len, ci_data(chn) - msg->next),
- /* on_error */ goto error);
- msg->next += ret;
- msg->chunk_len -= ret;
- if (msg->chunk_len) {
- /* input empty or output full */
- if (ci_data(chn) > msg->next)
- chn->flags |= CF_WAKE_WRITE;
- goto missing_data_or_waiting;
- }
-
- /* nothing left to forward for this chunk*/
- msg->msg_state = HTTP_MSG_CHUNK_CRLF;
- /* fall through for HTTP_MSG_CHUNK_CRLF */
-
- case HTTP_MSG_CHUNK_CRLF:
- /* we want the CRLF after the data */
- ret = h1_skip_chunk_crlf(&chn->buf, co_data(chn) + msg->next, c_data(chn));
- if (ret == 0)
- goto missing_data_or_waiting;
- if (ret < 0) {
- msg->err_pos = ci_data(chn) + ret;
- if (msg->err_pos < 0)
- msg->err_pos += chn->buf.size;
- goto chunk_parsing_error;
- }
- msg->next += ret;
- msg->msg_state = HTTP_MSG_CHUNK_SIZE;
- /* fall through for HTTP_MSG_CHUNK_SIZE */
-
- case HTTP_MSG_CHUNK_SIZE:
- /* read the chunk size and assign it to ->chunk_len,
- * then set ->next to point to the body and switch to
- * DATA or TRAILERS state.
- */
- ret = h1_parse_chunk_size(&chn->buf, co_data(chn) + msg->next, c_data(chn), &chunk);
- if (ret == 0)
- goto missing_data_or_waiting;
- if (ret < 0) {
- msg->err_pos = ci_data(chn) + ret;
- if (msg->err_pos < 0)
- msg->err_pos += chn->buf.size;
- goto chunk_parsing_error;
- }
-
- msg->sol = ret;
- msg->next += ret;
- msg->chunk_len = chunk;
- msg->body_len += chunk;
-
- if (msg->chunk_len) {
- msg->msg_state = HTTP_MSG_DATA;
- goto switch_states;
- }
- msg->msg_state = HTTP_MSG_TRAILERS;
- /* fall through for HTTP_MSG_TRAILERS */
-
- case HTTP_MSG_TRAILERS:
- ret = http_forward_trailers(msg);
- if (ret < 0)
- goto chunk_parsing_error;
- FLT_STRM_DATA_CB(s, chn, flt_http_chunk_trailers(s, msg),
- /* default_ret */ 1,
- /* on_error */ goto error);
- msg->next += msg->sol;
- if (!ret)
- goto missing_data_or_waiting;
- break;
-
- default:
- /* This should no happen in this function */
- goto error;
- }
-
- msg->msg_state = HTTP_MSG_ENDING;
- chn->flags |= CF_EOI;
-
- ending:
- /* we may have some pending data starting at res->buf.p such as a last
- * chunk of data or trailers. */
- ret = FLT_STRM_DATA_CB(s, chn, flt_http_forward_data(s, msg, msg->next),
- /* default_ret */ msg->next,
- /* on_error */ goto error);
- c_adv(chn, ret);
- msg->next -= ret;
- if (unlikely(!(chn->flags & CF_WROTE_DATA) || msg->sov > 0))
- msg->sov -= ret;
- if (msg->next)
- goto waiting;
-
- FLT_STRM_DATA_CB(s, chn, flt_http_end(s, msg),
- /* default_ret */ 1,
- /* on_error */ goto error,
- /* on_wait */ goto waiting);
- msg->msg_state = HTTP_MSG_DONE;
- return 1;
-
- missing_data_or_waiting:
- /* we may have some pending data starting at chn->buf.p */
- ret = FLT_STRM_DATA_CB(s, chn, flt_http_forward_data(s, msg, msg->next),
- /* default_ret */ msg->next,
- /* on_error */ goto error);
- c_adv(chn, ret);
- msg->next -= ret;
- if (!(chn->flags & CF_WROTE_DATA) || msg->sov > 0)
- msg->sov -= ret;
- if (!HAS_DATA_FILTERS(s, chn))
- msg->chunk_len -= channel_forward(chn, msg->chunk_len);
- waiting:
- return 0;
-
- chunk_parsing_error:
- if (msg->err_pos >= 0) {
- if (chn->flags & CF_ISRESP)
- http_capture_bad_message(s->be, s, msg,
- msg->msg_state, strm_fe(s));
- else
- http_capture_bad_message(strm_fe(s), s,
- msg, msg->msg_state, s->be);
- }
- error:
- return -1;
-}
-
-
-/* Iterate the same filter through all request headers.
- * Returns 1 if this filter can be stopped upon return, otherwise 0.
- * Since it can manage the switch to another backend, it updates the per-proxy
- * DENY stats.
- */
-int apply_filter_to_req_headers(struct stream *s, struct channel *req, struct hdr_exp *exp)
-{
- char *cur_ptr, *cur_end, *cur_next;
- int cur_idx, old_idx, last_hdr;
- struct http_txn *txn = s->txn;
- struct hdr_idx_elem *cur_hdr;
- int delta, len;
-
- last_hdr = 0;
-
- cur_next = ci_head(req) + hdr_idx_first_pos(&txn->hdr_idx);
- old_idx = 0;
-
- while (!last_hdr) {
- if (unlikely(txn->flags & (TX_CLDENY | TX_CLTARPIT)))
- return 1;
- else if (unlikely(txn->flags & TX_CLALLOW) &&
- (exp->action == ACT_ALLOW ||
- exp->action == ACT_DENY ||
- exp->action == ACT_TARPIT))
- return 0;
-
- cur_idx = txn->hdr_idx.v[old_idx].next;
- if (!cur_idx)
- break;
-
- cur_hdr = &txn->hdr_idx.v[cur_idx];
- cur_ptr = cur_next;
- cur_end = cur_ptr + cur_hdr->len;
- cur_next = cur_end + cur_hdr->cr + 1;
-
- /* Now we have one header between cur_ptr and cur_end,
- * and the next header starts at cur_next.
- */
-
- if (regex_exec_match2(exp->preg, cur_ptr, cur_end-cur_ptr, MAX_MATCH, pmatch, 0)) {
- switch (exp->action) {
- case ACT_ALLOW:
- txn->flags |= TX_CLALLOW;
- last_hdr = 1;
- break;
-
- case ACT_DENY:
- txn->flags |= TX_CLDENY;
- last_hdr = 1;
- break;
-
- case ACT_TARPIT:
- txn->flags |= TX_CLTARPIT;
- last_hdr = 1;
- break;
-
- case ACT_REPLACE:
- len = exp_replace(trash.area,
- trash.size, cur_ptr,
- exp->replace, pmatch);
- if (len < 0)
- return -1;
-
- delta = b_rep_blk(&req->buf, cur_ptr, cur_end, trash.area, len);
-
- /* FIXME: if the user adds a newline in the replacement, the
- * index will not be recalculated for now, and the new line
- * will not be counted as a new header.
- */
-
- cur_end += delta;
- cur_next += delta;
- cur_hdr->len += delta;
- http_msg_move_end(&txn->req, delta);
- break;
-
- case ACT_REMOVE:
- delta = b_rep_blk(&req->buf, cur_ptr, cur_next, NULL, 0);
- cur_next += delta;
-
- http_msg_move_end(&txn->req, delta);
- txn->hdr_idx.v[old_idx].next = cur_hdr->next;
- txn->hdr_idx.used--;
- cur_hdr->len = 0;
- cur_end = NULL; /* null-term has been rewritten */
- cur_idx = old_idx;
- break;
-
- }
- }
-
- /* keep the link from this header to next one in case of later
- * removal of next header.
- */
- old_idx = cur_idx;
- }
- return 0;
-}
-
-
-/* Apply the filter to the request line.
- * Returns 0 if nothing has been done, 1 if the filter has been applied,
- * or -1 if a replacement resulted in an invalid request line.
- * Since it can manage the switch to another backend, it updates the per-proxy
- * DENY stats.
- */
-int apply_filter_to_req_line(struct stream *s, struct channel *req, struct hdr_exp *exp)
-{
- char *cur_ptr, *cur_end;
- int done;
- struct http_txn *txn = s->txn;
- int delta, len;
-
- if (unlikely(txn->flags & (TX_CLDENY | TX_CLTARPIT)))
- return 1;
- else if (unlikely(txn->flags & TX_CLALLOW) &&
- (exp->action == ACT_ALLOW ||
- exp->action == ACT_DENY ||
- exp->action == ACT_TARPIT))
- return 0;
- else if (exp->action == ACT_REMOVE)
- return 0;
-
- done = 0;
-
- cur_ptr = ci_head(req);
- cur_end = cur_ptr + txn->req.sl.rq.l;
-
- /* Now we have the request line between cur_ptr and cur_end */
-
- if (regex_exec_match2(exp->preg, cur_ptr, cur_end-cur_ptr, MAX_MATCH, pmatch, 0)) {
- switch (exp->action) {
- case ACT_ALLOW:
- txn->flags |= TX_CLALLOW;
- done = 1;
- break;
-
- case ACT_DENY:
- txn->flags |= TX_CLDENY;
- done = 1;
- break;
-
- case ACT_TARPIT:
- txn->flags |= TX_CLTARPIT;
- done = 1;
- break;
-
- case ACT_REPLACE:
- len = exp_replace(trash.area, trash.size,
- cur_ptr, exp->replace, pmatch);
- if (len < 0)
- return -1;
-
- delta = b_rep_blk(&req->buf, cur_ptr, cur_end, trash.area, len);
-
- /* FIXME: if the user adds a newline in the replacement, the
- * index will not be recalculated for now, and the new line
- * will not be counted as a new header.
- */
-
- http_msg_move_end(&txn->req, delta);
- cur_end += delta;
- cur_end = (char *)http_parse_reqline(&txn->req,
- HTTP_MSG_RQMETH,
- cur_ptr, cur_end + 1,
- NULL, NULL);
- if (unlikely(!cur_end))
- return -1;
-
- /* we have a full request and we know that we have either a CR
- * or an LF at <ptr>.
- */
- txn->meth = find_http_meth(cur_ptr, txn->req.sl.rq.m_l);
- hdr_idx_set_start(&txn->hdr_idx, txn->req.sl.rq.l, *cur_end == '\r');
- /* there is no point trying this regex on headers */
- return 1;
- }
- }
- return done;
-}
-
-
-
-/*
- * Apply all the req filters of proxy <px> to all headers in buffer <req> of stream <s>.
- * Returns 0 if everything is alright, or -1 in case a replacement lead to an
- * unparsable request. Since it can manage the switch to another backend, it
- * updates the per-proxy DENY stats.
- */
-int apply_filters_to_request(struct stream *s, struct channel *req, struct proxy *px)
-{
- struct session *sess = s->sess;
- struct http_txn *txn = s->txn;
- struct hdr_exp *exp;
-
- for (exp = px->req_exp; exp; exp = exp->next) {
- int ret;
-
- /*
- * The interleaving of transformations and verdicts
- * makes it difficult to decide to continue or stop
- * the evaluation.
- */
-
- if (txn->flags & (TX_CLDENY|TX_CLTARPIT))
- break;
-
- if ((txn->flags & TX_CLALLOW) &&
- (exp->action == ACT_ALLOW || exp->action == ACT_DENY ||
- exp->action == ACT_TARPIT || exp->action == ACT_PASS))
- continue;
-
- /* if this filter had a condition, evaluate it now and skip to
- * next filter if the condition does not match.
- */
- if (exp->cond) {
- ret = acl_exec_cond(exp->cond, px, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL);
- ret = acl_pass(ret);
- if (((struct acl_cond *)exp->cond)->pol == ACL_COND_UNLESS)
- ret = !ret;
-
- if (!ret)
- continue;
- }
-
- /* Apply the filter to the request line. */
- ret = apply_filter_to_req_line(s, req, exp);
- if (unlikely(ret < 0))
- return -1;
-
- if (likely(ret == 0)) {
- /* The filter did not match the request, it can be
- * iterated through all headers.
- */
- if (unlikely(apply_filter_to_req_headers(s, req, exp) < 0))
- return -1;
- }
- }
- return 0;
-}
-
-
-/* Delete a value in a header between delimiters <from> and <next> in buffer
- * <buf>. The number of characters displaced is returned, and the pointer to
- * the first delimiter is updated if required. The function tries as much as
- * possible to respect the following principles :
- * - replace <from> delimiter by the <next> one unless <from> points to a
- * colon, in which case <next> is simply removed
- * - set exactly one space character after the new first delimiter, unless
- * there are not enough characters in the block being moved to do so.
- * - remove unneeded spaces before the previous delimiter and after the new
- * one.
- *
- * It is the caller's responsibility to ensure that :
- * - <from> points to a valid delimiter or the colon ;
- * - <next> points to a valid delimiter or the final CR/LF ;
- * - there are non-space chars before <from> ;
- * - there is a CR/LF at or after <next>.
- */
-static int del_hdr_value(struct buffer *buf, char **from, char *next)
-{
- char *prev = *from;
-
- if (*prev == ':') {
- /* We're removing the first value, preserve the colon and add a
- * space if possible.
- */
- if (!HTTP_IS_CRLF(*next))
- next++;
- prev++;
- if (prev < next)
- *prev++ = ' ';
-
- while (HTTP_IS_SPHT(*next))
- next++;
- } else {
- /* Remove useless spaces before the old delimiter. */
- while (HTTP_IS_SPHT(*(prev-1)))
- prev--;
- *from = prev;
-
- /* copy the delimiter and if possible a space if we're
- * not at the end of the line.
- */
- if (!HTTP_IS_CRLF(*next)) {
- *prev++ = *next++;
- if (prev + 1 < next)
- *prev++ = ' ';
- while (HTTP_IS_SPHT(*next))
- next++;
- }
- }
- return b_rep_blk(buf, prev, next, NULL, 0);
-}
-
-/*
- * Manage client-side cookie. It can impact performance by about 2% so it is
- * desirable to call it only when needed. This code is quite complex because
- * of the multiple very crappy and ambiguous syntaxes we have to support. it
- * highly recommended not to touch this part without a good reason !
- */
-void manage_client_side_cookies(struct stream *s, struct channel *req)
-{
- struct http_txn *txn = s->txn;
- struct session *sess = s->sess;
- int preserve_hdr;
- int cur_idx, old_idx;
- char *hdr_beg, *hdr_end, *hdr_next, *del_from;
- char *prev, *att_beg, *att_end, *equal, *val_beg, *val_end, *next;
-
- /* Iterate through the headers, we start with the start line. */
- old_idx = 0;
- hdr_next = ci_head(req) + hdr_idx_first_pos(&txn->hdr_idx);
-
- while ((cur_idx = txn->hdr_idx.v[old_idx].next)) {
- struct hdr_idx_elem *cur_hdr;
- int val;
-
- cur_hdr = &txn->hdr_idx.v[cur_idx];
- hdr_beg = hdr_next;
- hdr_end = hdr_beg + cur_hdr->len;
- hdr_next = hdr_end + cur_hdr->cr + 1;
-
- /* We have one full header between hdr_beg and hdr_end, and the
- * next header starts at hdr_next. We're only interested in
- * "Cookie:" headers.
- */
-
- val = http_header_match2(hdr_beg, hdr_end, "Cookie", 6);
- if (!val) {
- old_idx = cur_idx;
- continue;
- }
-
- del_from = NULL; /* nothing to be deleted */
- preserve_hdr = 0; /* assume we may kill the whole header */
-
- /* Now look for cookies. Conforming to RFC2109, we have to support
- * attributes whose name begin with a '$', and associate them with
- * the right cookie, if we want to delete this cookie.
- * So there are 3 cases for each cookie read :
- * 1) it's a special attribute, beginning with a '$' : ignore it.
- * 2) it's a server id cookie that we *MAY* want to delete : save
- * some pointers on it (last semi-colon, beginning of cookie...)
- * 3) it's an application cookie : we *MAY* have to delete a previous
- * "special" cookie.
- * At the end of loop, if a "special" cookie remains, we may have to
- * remove it. If no application cookie persists in the header, we
- * *MUST* delete it.
- *
- * Note: RFC2965 is unclear about the processing of spaces around
- * the equal sign in the ATTR=VALUE form. A careful inspection of
- * the RFC explicitly allows spaces before it, and not within the
- * tokens (attrs or values). An inspection of RFC2109 allows that
- * too but section 10.1.3 lets one think that spaces may be allowed
- * after the equal sign too, resulting in some (rare) buggy
- * implementations trying to do that. So let's do what servers do.
- * Latest ietf draft forbids spaces all around. Also, earlier RFCs
- * allowed quoted strings in values, with any possible character
- * after a backslash, including control chars and delimitors, which
- * causes parsing to become ambiguous. Browsers also allow spaces
- * within values even without quotes.
- *
- * We have to keep multiple pointers in order to support cookie
- * removal at the beginning, middle or end of header without
- * corrupting the header. All of these headers are valid :
- *
- * Cookie:NAME1=VALUE1;NAME2=VALUE2;NAME3=VALUE3\r\n
- * Cookie:NAME1=VALUE1;NAME2_ONLY ;NAME3=VALUE3\r\n
- * Cookie: NAME1 = VALUE 1 ; NAME2 = VALUE2 ; NAME3 = VALUE3\r\n
- * | | | | | | | | |
- * | | | | | | | | hdr_end <--+
- * | | | | | | | +--> next
- * | | | | | | +----> val_end
- * | | | | | +-----------> val_beg
- * | | | | +--------------> equal
- * | | | +----------------> att_end
- * | | +---------------------> att_beg
- * | +--------------------------> prev
- * +--------------------------------> hdr_beg
- */
-
- for (prev = hdr_beg + 6; prev < hdr_end; prev = next) {
- /* Iterate through all cookies on this line */
-
- /* find att_beg */
- att_beg = prev + 1;
- while (att_beg < hdr_end && HTTP_IS_SPHT(*att_beg))
- att_beg++;
-
- /* find att_end : this is the first character after the last non
- * space before the equal. It may be equal to hdr_end.
- */
- equal = att_end = att_beg;
-
- while (equal < hdr_end) {
- if (*equal == '=' || *equal == ',' || *equal == ';')
- break;
- if (HTTP_IS_SPHT(*equal++))
- continue;
- att_end = equal;
- }
-
- /* here, <equal> points to '=', a delimitor or the end. <att_end>
- * is between <att_beg> and <equal>, both may be identical.
- */
-
- /* look for end of cookie if there is an equal sign */
- if (equal < hdr_end && *equal == '=') {
- /* look for the beginning of the value */
- val_beg = equal + 1;
- while (val_beg < hdr_end && HTTP_IS_SPHT(*val_beg))
- val_beg++;
-
- /* find the end of the value, respecting quotes */
- next = http_find_cookie_value_end(val_beg, hdr_end);
-
- /* make val_end point to the first white space or delimitor after the value */
- val_end = next;
- while (val_end > val_beg && HTTP_IS_SPHT(*(val_end - 1)))
- val_end--;
- } else {
- val_beg = val_end = next = equal;
- }
-
- /* We have nothing to do with attributes beginning with '$'. However,
- * they will automatically be removed if a header before them is removed,
- * since they're supposed to be linked together.
- */
- if (*att_beg == '$')
- continue;
-
- /* Ignore cookies with no equal sign */
- if (equal == next) {
- /* This is not our cookie, so we must preserve it. But if we already
- * scheduled another cookie for removal, we cannot remove the
- * complete header, but we can remove the previous block itself.
- */
- preserve_hdr = 1;
- if (del_from != NULL) {
- int delta = del_hdr_value(&req->buf, &del_from, prev);
- val_end += delta;
- next += delta;
- hdr_end += delta;
- hdr_next += delta;
- cur_hdr->len += delta;
- http_msg_move_end(&txn->req, delta);
- prev = del_from;
- del_from = NULL;
- }
- continue;
- }
-
- /* if there are spaces around the equal sign, we need to
- * strip them otherwise we'll get trouble for cookie captures,
- * or even for rewrites. Since this happens extremely rarely,
- * it does not hurt performance.
- */
- if (unlikely(att_end != equal || val_beg > equal + 1)) {
- int stripped_before = 0;
- int stripped_after = 0;
-
- if (att_end != equal) {
- stripped_before = b_rep_blk(&req->buf, att_end, equal, NULL, 0);
- equal += stripped_before;
- val_beg += stripped_before;
- }
-
- if (val_beg > equal + 1) {
- stripped_after = b_rep_blk(&req->buf, equal + 1, val_beg, NULL, 0);
- val_beg += stripped_after;
- stripped_before += stripped_after;
- }
-
- val_end += stripped_before;
- next += stripped_before;
- hdr_end += stripped_before;
- hdr_next += stripped_before;
- cur_hdr->len += stripped_before;
- http_msg_move_end(&txn->req, stripped_before);
- }
- /* now everything is as on the diagram above */
-
- /* First, let's see if we want to capture this cookie. We check
- * that we don't already have a client side cookie, because we
- * can only capture one. Also as an optimisation, we ignore
- * cookies shorter than the declared name.
- */
- if (sess->fe->capture_name != NULL && txn->cli_cookie == NULL &&
- (val_end - att_beg >= sess->fe->capture_namelen) &&
- memcmp(att_beg, sess->fe->capture_name, sess->fe->capture_namelen) == 0) {
- int log_len = val_end - att_beg;
-
- if ((txn->cli_cookie = pool_alloc(pool_head_capture)) == NULL) {
- ha_alert("HTTP logging : out of memory.\n");
- } else {
- if (log_len > sess->fe->capture_len)
- log_len = sess->fe->capture_len;
- memcpy(txn->cli_cookie, att_beg, log_len);
- txn->cli_cookie[log_len] = 0;
- }
- }
-
- /* Persistence cookies in passive, rewrite or insert mode have the
- * following form :
- *
- * Cookie: NAME=SRV[|<lastseen>[|<firstseen>]]
- *
- * For cookies in prefix mode, the form is :
- *
- * Cookie: NAME=SRV~VALUE
- */
- if ((att_end - att_beg == s->be->cookie_len) && (s->be->cookie_name != NULL) &&
- (memcmp(att_beg, s->be->cookie_name, att_end - att_beg) == 0)) {
- struct server *srv = s->be->srv;
- char *delim;
-
- /* if we're in cookie prefix mode, we'll search the delimitor so that we
- * have the server ID between val_beg and delim, and the original cookie between
- * delim+1 and val_end. Otherwise, delim==val_end :
- *
- * Cookie: NAME=SRV; # in all but prefix modes
- * Cookie: NAME=SRV~OPAQUE ; # in prefix mode
- * | || || | |+-> next
- * | || || | +--> val_end
- * | || || +---------> delim
- * | || |+------------> val_beg
- * | || +-------------> att_end = equal
- * | |+-----------------> att_beg
- * | +------------------> prev
- * +-------------------------> hdr_beg
- */
-
- if (s->be->ck_opts & PR_CK_PFX) {
- for (delim = val_beg; delim < val_end; delim++)
- if (*delim == COOKIE_DELIM)
- break;
- } else {
- char *vbar1;
- delim = val_end;
- /* Now check if the cookie contains a date field, which would
- * appear after a vertical bar ('|') just after the server name
- * and before the delimiter.
- */
- vbar1 = memchr(val_beg, COOKIE_DELIM_DATE, val_end - val_beg);
- if (vbar1) {
- /* OK, so left of the bar is the server's cookie and
- * right is the last seen date. It is a base64 encoded
- * 30-bit value representing the UNIX date since the
- * epoch in 4-second quantities.
- */
- int val;
- delim = vbar1++;
- if (val_end - vbar1 >= 5) {
- val = b64tos30(vbar1);
- if (val > 0)
- txn->cookie_last_date = val << 2;
- }
- /* look for a second vertical bar */
- vbar1 = memchr(vbar1, COOKIE_DELIM_DATE, val_end - vbar1);
- if (vbar1 && (val_end - vbar1 > 5)) {
- val = b64tos30(vbar1 + 1);
- if (val > 0)
- txn->cookie_first_date = val << 2;
- }
- }
- }
-
- /* if the cookie has an expiration date and the proxy wants to check
- * it, then we do that now. We first check if the cookie is too old,
- * then only if it has expired. We detect strict overflow because the
- * time resolution here is not great (4 seconds). Cookies with dates
- * in the future are ignored if their offset is beyond one day. This
- * allows an admin to fix timezone issues without expiring everyone
- * and at the same time avoids keeping unwanted side effects for too
- * long.
- */
- if (txn->cookie_first_date && s->be->cookie_maxlife &&
- (((signed)(date.tv_sec - txn->cookie_first_date) > (signed)s->be->cookie_maxlife) ||
- ((signed)(txn->cookie_first_date - date.tv_sec) > 86400))) {
- txn->flags &= ~TX_CK_MASK;
- txn->flags |= TX_CK_OLD;
- delim = val_beg; // let's pretend we have not found the cookie
- txn->cookie_first_date = 0;
- txn->cookie_last_date = 0;
- }
- else if (txn->cookie_last_date && s->be->cookie_maxidle &&
- (((signed)(date.tv_sec - txn->cookie_last_date) > (signed)s->be->cookie_maxidle) ||
- ((signed)(txn->cookie_last_date - date.tv_sec) > 86400))) {
- txn->flags &= ~TX_CK_MASK;
- txn->flags |= TX_CK_EXPIRED;
- delim = val_beg; // let's pretend we have not found the cookie
- txn->cookie_first_date = 0;
- txn->cookie_last_date = 0;
- }
-
- /* Here, we'll look for the first running server which supports the cookie.
- * This allows to share a same cookie between several servers, for example
- * to dedicate backup servers to specific servers only.
- * However, to prevent clients from sticking to cookie-less backup server
- * when they have incidentely learned an empty cookie, we simply ignore
- * empty cookies and mark them as invalid.
- * The same behaviour is applied when persistence must be ignored.
- */
- if ((delim == val_beg) || (s->flags & (SF_IGNORE_PRST | SF_ASSIGNED)))
- srv = NULL;
-
- while (srv) {
- if (srv->cookie && (srv->cklen == delim - val_beg) &&
- !memcmp(val_beg, srv->cookie, delim - val_beg)) {
- if ((srv->cur_state != SRV_ST_STOPPED) ||
- (s->be->options & PR_O_PERSIST) ||
- (s->flags & SF_FORCE_PRST)) {
- /* we found the server and we can use it */
- txn->flags &= ~TX_CK_MASK;
- txn->flags |= (srv->cur_state != SRV_ST_STOPPED) ? TX_CK_VALID : TX_CK_DOWN;
- s->flags |= SF_DIRECT | SF_ASSIGNED;
- s->target = &srv->obj_type;
- break;
- } else {
- /* we found a server, but it's down,
- * mark it as such and go on in case
- * another one is available.
- */
- txn->flags &= ~TX_CK_MASK;
- txn->flags |= TX_CK_DOWN;
- }
- }
- srv = srv->next;
- }
-
- if (!srv && !(txn->flags & (TX_CK_DOWN|TX_CK_EXPIRED|TX_CK_OLD))) {
- /* no server matched this cookie or we deliberately skipped it */
- txn->flags &= ~TX_CK_MASK;
- if ((s->flags & (SF_IGNORE_PRST | SF_ASSIGNED)))
- txn->flags |= TX_CK_UNUSED;
- else
- txn->flags |= TX_CK_INVALID;
- }
-
- /* depending on the cookie mode, we may have to either :
- * - delete the complete cookie if we're in insert+indirect mode, so that
- * the server never sees it ;
- * - remove the server id from the cookie value, and tag the cookie as an
- * application cookie so that it does not get accidently removed later,
- * if we're in cookie prefix mode
- */
- if ((s->be->ck_opts & PR_CK_PFX) && (delim != val_end)) {
- int delta; /* negative */
-
- delta = b_rep_blk(&req->buf, val_beg, delim + 1, NULL, 0);
- val_end += delta;
- next += delta;
- hdr_end += delta;
- hdr_next += delta;
- cur_hdr->len += delta;
- http_msg_move_end(&txn->req, delta);
-
- del_from = NULL;
- preserve_hdr = 1; /* we want to keep this cookie */
- }
- else if (del_from == NULL &&
- (s->be->ck_opts & (PR_CK_INS | PR_CK_IND)) == (PR_CK_INS | PR_CK_IND)) {
- del_from = prev;
- }
- } else {
- /* This is not our cookie, so we must preserve it. But if we already
- * scheduled another cookie for removal, we cannot remove the
- * complete header, but we can remove the previous block itself.
- */
- preserve_hdr = 1;
-
- if (del_from != NULL) {
- int delta = del_hdr_value(&req->buf, &del_from, prev);
- if (att_beg >= del_from)
- att_beg += delta;
- if (att_end >= del_from)
- att_end += delta;
- val_beg += delta;
- val_end += delta;
- next += delta;
- hdr_end += delta;
- hdr_next += delta;
- cur_hdr->len += delta;
- http_msg_move_end(&txn->req, delta);
- prev = del_from;
- del_from = NULL;
- }
- }
-
- /* continue with next cookie on this header line */
- att_beg = next;
- } /* for each cookie */
-
- /* There are no more cookies on this line.
- * We may still have one (or several) marked for deletion at the
- * end of the line. We must do this now in two ways :
- * - if some cookies must be preserved, we only delete from the
- * mark to the end of line ;
- * - if nothing needs to be preserved, simply delete the whole header
- */
- if (del_from) {
- int delta;
- if (preserve_hdr) {
- delta = del_hdr_value(&req->buf, &del_from, hdr_end);
- hdr_end = del_from;
- cur_hdr->len += delta;
- } else {
- delta = b_rep_blk(&req->buf, hdr_beg, hdr_next, NULL, 0);
-
- /* FIXME: this should be a separate function */
- txn->hdr_idx.v[old_idx].next = cur_hdr->next;
- txn->hdr_idx.used--;
- cur_hdr->len = 0;
- cur_idx = old_idx;
- }
- hdr_next += delta;
- http_msg_move_end(&txn->req, delta);
- }
-
- /* check next header */
- old_idx = cur_idx;
- }
-}
-
-
-/* Iterate the same filter through all response headers contained in <rtr>.
- * Returns 1 if this filter can be stopped upon return, otherwise 0.
- */
-int apply_filter_to_resp_headers(struct stream *s, struct channel *rtr, struct hdr_exp *exp)
-{
- char *cur_ptr, *cur_end, *cur_next;
- int cur_idx, old_idx, last_hdr;
- struct http_txn *txn = s->txn;
- struct hdr_idx_elem *cur_hdr;
- int delta, len;
-
- last_hdr = 0;
-
- cur_next = ci_head(rtr) + hdr_idx_first_pos(&txn->hdr_idx);
- old_idx = 0;
-
- while (!last_hdr) {
- if (unlikely(txn->flags & TX_SVDENY))
- return 1;
- else if (unlikely(txn->flags & TX_SVALLOW) &&
- (exp->action == ACT_ALLOW ||
- exp->action == ACT_DENY))
- return 0;
-
- cur_idx = txn->hdr_idx.v[old_idx].next;
- if (!cur_idx)
- break;
-
- cur_hdr = &txn->hdr_idx.v[cur_idx];
- cur_ptr = cur_next;
- cur_end = cur_ptr + cur_hdr->len;
- cur_next = cur_end + cur_hdr->cr + 1;
-
- /* Now we have one header between cur_ptr and cur_end,
- * and the next header starts at cur_next.
- */
-
- if (regex_exec_match2(exp->preg, cur_ptr, cur_end-cur_ptr, MAX_MATCH, pmatch, 0)) {
- switch (exp->action) {
- case ACT_ALLOW:
- txn->flags |= TX_SVALLOW;
- last_hdr = 1;
- break;
-
- case ACT_DENY:
- txn->flags |= TX_SVDENY;
- last_hdr = 1;
- break;
-
- case ACT_REPLACE:
- len = exp_replace(trash.area,
- trash.size, cur_ptr,
- exp->replace, pmatch);
- if (len < 0)
- return -1;
-
- delta = b_rep_blk(&rtr->buf, cur_ptr, cur_end, trash.area, len);
-
- /* FIXME: if the user adds a newline in the replacement, the
- * index will not be recalculated for now, and the new line
- * will not be counted as a new header.
- */
-
- cur_end += delta;
- cur_next += delta;
- cur_hdr->len += delta;
- http_msg_move_end(&txn->rsp, delta);
- break;
-
- case ACT_REMOVE:
- delta = b_rep_blk(&rtr->buf, cur_ptr, cur_next, NULL, 0);
- cur_next += delta;
-
- http_msg_move_end(&txn->rsp, delta);
- txn->hdr_idx.v[old_idx].next = cur_hdr->next;
- txn->hdr_idx.used--;
- cur_hdr->len = 0;
- cur_end = NULL; /* null-term has been rewritten */
- cur_idx = old_idx;
- break;
-
- }
- }
-
- /* keep the link from this header to next one in case of later
- * removal of next header.
- */
- old_idx = cur_idx;
- }
- return 0;
-}
-
-
-/* Apply the filter to the status line in the response buffer <rtr>.
- * Returns 0 if nothing has been done, 1 if the filter has been applied,
- * or -1 if a replacement resulted in an invalid status line.
- */
-int apply_filter_to_sts_line(struct stream *s, struct channel *rtr, struct hdr_exp *exp)
-{
- char *cur_ptr, *cur_end;
- int done;
- struct http_txn *txn = s->txn;
- int delta, len;
-
- if (unlikely(txn->flags & TX_SVDENY))
- return 1;
- else if (unlikely(txn->flags & TX_SVALLOW) &&
- (exp->action == ACT_ALLOW ||
- exp->action == ACT_DENY))
- return 0;
- else if (exp->action == ACT_REMOVE)
- return 0;
-
- done = 0;
-
- cur_ptr = ci_head(rtr);
- cur_end = cur_ptr + txn->rsp.sl.st.l;
-
- /* Now we have the status line between cur_ptr and cur_end */
-
- if (regex_exec_match2(exp->preg, cur_ptr, cur_end-cur_ptr, MAX_MATCH, pmatch, 0)) {
- switch (exp->action) {
- case ACT_ALLOW:
- txn->flags |= TX_SVALLOW;
- done = 1;
- break;
-
- case ACT_DENY:
- txn->flags |= TX_SVDENY;
- done = 1;
- break;
-
- case ACT_REPLACE:
- len = exp_replace(trash.area, trash.size,
- cur_ptr, exp->replace, pmatch);
- if (len < 0)
- return -1;
-
- delta = b_rep_blk(&rtr->buf, cur_ptr, cur_end, trash.area, len);
-
- /* FIXME: if the user adds a newline in the replacement, the
- * index will not be recalculated for now, and the new line
- * will not be counted as a new header.
- */
-
- http_msg_move_end(&txn->rsp, delta);
- cur_end += delta;
- cur_end = (char *)http_parse_stsline(&txn->rsp,
- HTTP_MSG_RPVER,
- cur_ptr, cur_end + 1,
- NULL, NULL);
- if (unlikely(!cur_end))
- return -1;
-
- /* we have a full respnse and we know that we have either a CR
- * or an LF at <ptr>.
- */
- txn->status = strl2ui(ci_head(rtr) + txn->rsp.sl.st.c, txn->rsp.sl.st.c_l);
- hdr_idx_set_start(&txn->hdr_idx, txn->rsp.sl.st.l, *cur_end == '\r');
- /* there is no point trying this regex on headers */
- return 1;
- }
- }
- return done;
-}
-
-
-
-/*
- * Apply all the resp filters of proxy <px> to all headers in buffer <rtr> of stream <s>.
- * Returns 0 if everything is alright, or -1 in case a replacement lead to an
- * unparsable response.
- */
-int apply_filters_to_response(struct stream *s, struct channel *rtr, struct proxy *px)
-{
- struct session *sess = s->sess;
- struct http_txn *txn = s->txn;
- struct hdr_exp *exp;
-
- for (exp = px->rsp_exp; exp; exp = exp->next) {
- int ret;
-
- /*
- * The interleaving of transformations and verdicts
- * makes it difficult to decide to continue or stop
- * the evaluation.
- */
-
- if (txn->flags & TX_SVDENY)
- break;
-
- if ((txn->flags & TX_SVALLOW) &&
- (exp->action == ACT_ALLOW || exp->action == ACT_DENY ||
- exp->action == ACT_PASS)) {
- exp = exp->next;
- continue;
- }
-
- /* if this filter had a condition, evaluate it now and skip to
- * next filter if the condition does not match.
- */
- if (exp->cond) {
- ret = acl_exec_cond(exp->cond, px, sess, s, SMP_OPT_DIR_RES|SMP_OPT_FINAL);
- ret = acl_pass(ret);
- if (((struct acl_cond *)exp->cond)->pol == ACL_COND_UNLESS)
- ret = !ret;
- if (!ret)
- continue;
- }
-
- /* Apply the filter to the status line. */
- ret = apply_filter_to_sts_line(s, rtr, exp);
- if (unlikely(ret < 0))
- return -1;
-
- if (likely(ret == 0)) {
- /* The filter did not match the response, it can be
- * iterated through all headers.
- */
- if (unlikely(apply_filter_to_resp_headers(s, rtr, exp) < 0))
- return -1;
- }
- }
- return 0;
-}
-
-
-/*
- * Manage server-side cookies. It can impact performance by about 2% so it is
- * desirable to call it only when needed. This function is also used when we
- * just need to know if there is a cookie (eg: for check-cache).
- */
-void manage_server_side_cookies(struct stream *s, struct channel *res)
-{
- struct http_txn *txn = s->txn;
- struct session *sess = s->sess;
- struct server *srv;
- int is_cookie2;
- int cur_idx, old_idx, delta;
- char *hdr_beg, *hdr_end, *hdr_next;
- char *prev, *att_beg, *att_end, *equal, *val_beg, *val_end, *next;
-
- /* Iterate through the headers.
- * we start with the start line.
- */
- old_idx = 0;
- hdr_next = ci_head(res) + hdr_idx_first_pos(&txn->hdr_idx);
-
- while ((cur_idx = txn->hdr_idx.v[old_idx].next)) {
- struct hdr_idx_elem *cur_hdr;
- int val;
-
- cur_hdr = &txn->hdr_idx.v[cur_idx];
- hdr_beg = hdr_next;
- hdr_end = hdr_beg + cur_hdr->len;
- hdr_next = hdr_end + cur_hdr->cr + 1;
-
- /* We have one full header between hdr_beg and hdr_end, and the
- * next header starts at hdr_next. We're only interested in
- * "Set-Cookie" and "Set-Cookie2" headers.
- */
-
- is_cookie2 = 0;
- prev = hdr_beg + 10;
- val = http_header_match2(hdr_beg, hdr_end, "Set-Cookie", 10);
- if (!val) {
- val = http_header_match2(hdr_beg, hdr_end, "Set-Cookie2", 11);
- if (!val) {
- old_idx = cur_idx;
- continue;
- }
- is_cookie2 = 1;
- prev = hdr_beg + 11;
- }
-
- /* OK, right now we know we have a Set-Cookie* at hdr_beg, and
- * <prev> points to the colon.
- */
- txn->flags |= TX_SCK_PRESENT;
-
- /* Maybe we only wanted to see if there was a Set-Cookie (eg:
- * check-cache is enabled) and we are not interested in checking
- * them. Warning, the cookie capture is declared in the frontend.
- */
- if (s->be->cookie_name == NULL && sess->fe->capture_name == NULL)
- return;
-
- /* OK so now we know we have to process this response cookie.
- * The format of the Set-Cookie header is slightly different
- * from the format of the Cookie header in that it does not
- * support the comma as a cookie delimiter (thus the header
- * cannot be folded) because the Expires attribute described in
- * the original Netscape's spec may contain an unquoted date
- * with a comma inside. We have to live with this because
- * many browsers don't support Max-Age and some browsers don't
- * support quoted strings. However the Set-Cookie2 header is
- * clean.
- *
- * We have to keep multiple pointers in order to support cookie
- * removal at the beginning, middle or end of header without
- * corrupting the header (in case of set-cookie2). A special
- * pointer, <scav> points to the beginning of the set-cookie-av
- * fields after the first semi-colon. The <next> pointer points
- * either to the end of line (set-cookie) or next unquoted comma
- * (set-cookie2). All of these headers are valid :
- *
- * Set-Cookie: NAME1 = VALUE 1 ; Secure; Path="/"\r\n
- * Set-Cookie:NAME=VALUE; Secure; Expires=Thu, 01-Jan-1970 00:00:01 GMT\r\n
- * Set-Cookie: NAME = VALUE ; Secure; Expires=Thu, 01-Jan-1970 00:00:01 GMT\r\n
- * Set-Cookie2: NAME1 = VALUE 1 ; Max-Age=0, NAME2=VALUE2; Discard\r\n
- * | | | | | | | | | |
- * | | | | | | | | +-> next hdr_end <--+
- * | | | | | | | +------------> scav
- * | | | | | | +--------------> val_end
- * | | | | | +--------------------> val_beg
- * | | | | +----------------------> equal
- * | | | +------------------------> att_end
- * | | +----------------------------> att_beg
- * | +------------------------------> prev
- * +-----------------------------------------> hdr_beg
- */
-
- for (; prev < hdr_end; prev = next) {
- /* Iterate through all cookies on this line */
-
- /* find att_beg */
- att_beg = prev + 1;
- while (att_beg < hdr_end && HTTP_IS_SPHT(*att_beg))
- att_beg++;
-
- /* find att_end : this is the first character after the last non
- * space before the equal. It may be equal to hdr_end.
- */
- equal = att_end = att_beg;
-
- while (equal < hdr_end) {
- if (*equal == '=' || *equal == ';' || (is_cookie2 && *equal == ','))
- break;
- if (HTTP_IS_SPHT(*equal++))
- continue;
- att_end = equal;
- }
-
- /* here, <equal> points to '=', a delimitor or the end. <att_end>
- * is between <att_beg> and <equal>, both may be identical.
- */
-
- /* look for end of cookie if there is an equal sign */
- if (equal < hdr_end && *equal == '=') {
- /* look for the beginning of the value */
- val_beg = equal + 1;
- while (val_beg < hdr_end && HTTP_IS_SPHT(*val_beg))
- val_beg++;
-
- /* find the end of the value, respecting quotes */
- next = http_find_cookie_value_end(val_beg, hdr_end);
-
- /* make val_end point to the first white space or delimitor after the value */
- val_end = next;
- while (val_end > val_beg && HTTP_IS_SPHT(*(val_end - 1)))
- val_end--;
- } else {
- /* <equal> points to next comma, semi-colon or EOL */
- val_beg = val_end = next = equal;
- }
-
- if (next < hdr_end) {
- /* Set-Cookie2 supports multiple cookies, and <next> points to
- * a colon or semi-colon before the end. So skip all attr-value
- * pairs and look for the next comma. For Set-Cookie, since
- * commas are permitted in values, skip to the end.
- */
- if (is_cookie2)
- next = http_find_hdr_value_end(next, hdr_end);
- else
- next = hdr_end;
- }
-
- /* Now everything is as on the diagram above */
-
- /* Ignore cookies with no equal sign */
- if (equal == val_end)
- continue;
-
- /* If there are spaces around the equal sign, we need to
- * strip them otherwise we'll get trouble for cookie captures,
- * or even for rewrites. Since this happens extremely rarely,
- * it does not hurt performance.
- */
- if (unlikely(att_end != equal || val_beg > equal + 1)) {
- int stripped_before = 0;
- int stripped_after = 0;
-
- if (att_end != equal) {
- stripped_before = b_rep_blk(&res->buf, att_end, equal, NULL, 0);
- equal += stripped_before;
- val_beg += stripped_before;
- }
-
- if (val_beg > equal + 1) {
- stripped_after = b_rep_blk(&res->buf, equal + 1, val_beg, NULL, 0);
- val_beg += stripped_after;
- stripped_before += stripped_after;
- }
-
- val_end += stripped_before;
- next += stripped_before;
- hdr_end += stripped_before;
- hdr_next += stripped_before;
- cur_hdr->len += stripped_before;
- http_msg_move_end(&txn->rsp, stripped_before);
- }
-
- /* First, let's see if we want to capture this cookie. We check
- * that we don't already have a server side cookie, because we
- * can only capture one. Also as an optimisation, we ignore
- * cookies shorter than the declared name.
- */
- if (sess->fe->capture_name != NULL &&
- txn->srv_cookie == NULL &&
- (val_end - att_beg >= sess->fe->capture_namelen) &&
- memcmp(att_beg, sess->fe->capture_name, sess->fe->capture_namelen) == 0) {
- int log_len = val_end - att_beg;
- if ((txn->srv_cookie = pool_alloc(pool_head_capture)) == NULL) {
- ha_alert("HTTP logging : out of memory.\n");
- }
- else {
- if (log_len > sess->fe->capture_len)
- log_len = sess->fe->capture_len;
- memcpy(txn->srv_cookie, att_beg, log_len);
- txn->srv_cookie[log_len] = 0;
- }
- }
-
- srv = objt_server(s->target);
- /* now check if we need to process it for persistence */
- if (!(s->flags & SF_IGNORE_PRST) &&
- (att_end - att_beg == s->be->cookie_len) && (s->be->cookie_name != NULL) &&
- (memcmp(att_beg, s->be->cookie_name, att_end - att_beg) == 0)) {
- /* assume passive cookie by default */
- txn->flags &= ~TX_SCK_MASK;
- txn->flags |= TX_SCK_FOUND;
-
- /* If the cookie is in insert mode on a known server, we'll delete
- * this occurrence because we'll insert another one later.
- * We'll delete it too if the "indirect" option is set and we're in
- * a direct access.
- */
- if (s->be->ck_opts & PR_CK_PSV) {
- /* The "preserve" flag was set, we don't want to touch the
- * server's cookie.
- */
- }
- else if ((srv && (s->be->ck_opts & PR_CK_INS)) ||
- ((s->flags & SF_DIRECT) && (s->be->ck_opts & PR_CK_IND))) {
- /* this cookie must be deleted */
- if (*prev == ':' && next == hdr_end) {
- /* whole header */
- delta = b_rep_blk(&res->buf, hdr_beg, hdr_next, NULL, 0);
- txn->hdr_idx.v[old_idx].next = cur_hdr->next;
- txn->hdr_idx.used--;
- cur_hdr->len = 0;
- cur_idx = old_idx;
- hdr_next += delta;
- http_msg_move_end(&txn->rsp, delta);
- /* note: while both invalid now, <next> and <hdr_end>
- * are still equal, so the for() will stop as expected.
- */
- } else {
- /* just remove the value */
- int delta = del_hdr_value(&res->buf, &prev, next);
- next = prev;
- hdr_end += delta;
- hdr_next += delta;
- cur_hdr->len += delta;
- http_msg_move_end(&txn->rsp, delta);
- }
- txn->flags &= ~TX_SCK_MASK;
- txn->flags |= TX_SCK_DELETED;
- /* and go on with next cookie */
- }
- else if (srv && srv->cookie && (s->be->ck_opts & PR_CK_RW)) {
- /* replace bytes val_beg->val_end with the cookie name associated
- * with this server since we know it.
- */
- delta = b_rep_blk(&res->buf, val_beg, val_end, srv->cookie, srv->cklen);
- next += delta;
- hdr_end += delta;
- hdr_next += delta;
- cur_hdr->len += delta;
- http_msg_move_end(&txn->rsp, delta);
-
- txn->flags &= ~TX_SCK_MASK;
- txn->flags |= TX_SCK_REPLACED;
- }
- else if (srv && srv->cookie && (s->be->ck_opts & PR_CK_PFX)) {
- /* insert the cookie name associated with this server
- * before existing cookie, and insert a delimiter between them..
- */
- delta = b_rep_blk(&res->buf, val_beg, val_beg, srv->cookie, srv->cklen + 1);
- next += delta;
- hdr_end += delta;
- hdr_next += delta;
- cur_hdr->len += delta;
- http_msg_move_end(&txn->rsp, delta);
-
- val_beg[srv->cklen] = COOKIE_DELIM;
- txn->flags &= ~TX_SCK_MASK;
- txn->flags |= TX_SCK_REPLACED;
- }
- }
- /* that's done for this cookie, check the next one on the same
- * line when next != hdr_end (only if is_cookie2).
- */
- }
- /* check next header */
- old_idx = cur_idx;
- }
-}
-
-
-/*
- * Parses the Cache-Control and Pragma request header fields to determine if
- * the request may be served from the cache and/or if it is cacheable. Updates
- * s->txn->flags.
- */
-void check_request_for_cacheability(struct stream *s, struct channel *chn)
-{
- struct http_txn *txn = s->txn;
- char *p1, *p2;
- char *cur_ptr, *cur_end, *cur_next;
- int pragma_found;
- int cc_found;
- int cur_idx;
-
- if (IS_HTX_STRM(s))
- return htx_check_request_for_cacheability(s, chn);
-
- if ((txn->flags & (TX_CACHEABLE|TX_CACHE_IGNORE)) == TX_CACHE_IGNORE)
- return; /* nothing more to do here */
-
- cur_idx = 0;
- pragma_found = cc_found = 0;
- cur_next = ci_head(chn) + hdr_idx_first_pos(&txn->hdr_idx);
-
- while ((cur_idx = txn->hdr_idx.v[cur_idx].next)) {
- struct hdr_idx_elem *cur_hdr;
- int val;
-
- cur_hdr = &txn->hdr_idx.v[cur_idx];
- cur_ptr = cur_next;
- cur_end = cur_ptr + cur_hdr->len;
- cur_next = cur_end + cur_hdr->cr + 1;
-
- /* We have one full header between cur_ptr and cur_end, and the
- * next header starts at cur_next.
- */
-
- val = http_header_match2(cur_ptr, cur_end, "Pragma", 6);
- if (val) {
- if ((cur_end - (cur_ptr + val) >= 8) &&
- strncasecmp(cur_ptr + val, "no-cache", 8) == 0) {
- pragma_found = 1;
- continue;
- }
- }
-
- /* Don't use the cache and don't try to store if we found the
- * Authorization header */
- val = http_header_match2(cur_ptr, cur_end, "Authorization", 13);
- if (val) {
- txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
- txn->flags |= TX_CACHE_IGNORE;
- continue;
- }
-
- val = http_header_match2(cur_ptr, cur_end, "Cache-control", 13);
- if (!val)
- continue;
-
- /* OK, right now we know we have a cache-control header at cur_ptr */
- cc_found = 1;
- p1 = cur_ptr + val; /* first non-space char after 'cache-control:' */
-
- if (p1 >= cur_end) /* no more info */
- continue;
-
- /* p1 is at the beginning of the value */
- p2 = p1;
- while (p2 < cur_end && *p2 != '=' && *p2 != ',' && !isspace((unsigned char)*p2))
- p2++;
-
- /* we have a complete value between p1 and p2. We don't check the
- * values after max-age, max-stale nor min-fresh, we simply don't
- * use the cache when they're specified.
- */
- if (((p2 - p1 == 7) && strncasecmp(p1, "max-age", 7) == 0) ||
- ((p2 - p1 == 8) && strncasecmp(p1, "no-cache", 8) == 0) ||
- ((p2 - p1 == 9) && strncasecmp(p1, "max-stale", 9) == 0) ||
- ((p2 - p1 == 9) && strncasecmp(p1, "min-fresh", 9) == 0)) {
- txn->flags |= TX_CACHE_IGNORE;
- continue;
- }
-
- if ((p2 - p1 == 8) && strncasecmp(p1, "no-store", 8) == 0) {
- txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
- continue;
- }
- }
-
- /* RFC7234#5.4:
- * When the Cache-Control header field is also present and
- * understood in a request, Pragma is ignored.
- * When the Cache-Control header field is not present in a
- * request, caches MUST consider the no-cache request
- * pragma-directive as having the same effect as if
- * "Cache-Control: no-cache" were present.
- */
- if (!cc_found && pragma_found)
- txn->flags |= TX_CACHE_IGNORE;
-}
-
-/*
- * Check if response is cacheable or not. Updates s->txn->flags.
- */
-void check_response_for_cacheability(struct stream *s, struct channel *rtr)
-{
- struct http_txn *txn = s->txn;
- char *p1, *p2;
-
- char *cur_ptr, *cur_end, *cur_next;
- int cur_idx;
-
-
- if (IS_HTX_STRM(s))
- return htx_check_response_for_cacheability(s, rtr);
-
- if (txn->status < 200) {
- /* do not try to cache interim responses! */
- txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
- return;
- }
-
- /* Iterate through the headers.
- * we start with the start line.
- */
- cur_idx = 0;
- cur_next = ci_head(rtr) + hdr_idx_first_pos(&txn->hdr_idx);
-
- while ((cur_idx = txn->hdr_idx.v[cur_idx].next)) {
- struct hdr_idx_elem *cur_hdr;
- int val;
-
- cur_hdr = &txn->hdr_idx.v[cur_idx];
- cur_ptr = cur_next;
- cur_end = cur_ptr + cur_hdr->len;
- cur_next = cur_end + cur_hdr->cr + 1;
-
- /* We have one full header between cur_ptr and cur_end, and the
- * next header starts at cur_next.
- */
-
- val = http_header_match2(cur_ptr, cur_end, "Pragma", 6);
- if (val) {
- if ((cur_end - (cur_ptr + val) >= 8) &&
- strncasecmp(cur_ptr + val, "no-cache", 8) == 0) {
- txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
- return;
- }
- }
-
- val = http_header_match2(cur_ptr, cur_end, "Cache-control", 13);
- if (!val)
- continue;
-
- /* OK, right now we know we have a cache-control header at cur_ptr */
-
- p1 = cur_ptr + val; /* first non-space char after 'cache-control:' */
-
- if (p1 >= cur_end) /* no more info */
- continue;
-
- /* p1 is at the beginning of the value */
- p2 = p1;
-
- while (p2 < cur_end && *p2 != '=' && *p2 != ',' && !isspace((unsigned char)*p2))
- p2++;
-
- /* we have a complete value between p1 and p2 */
- if (p2 < cur_end && *p2 == '=') {
- if (((cur_end - p2) > 1 && (p2 - p1 == 7) && strncasecmp(p1, "max-age=0", 9) == 0) ||
- ((cur_end - p2) > 1 && (p2 - p1 == 8) && strncasecmp(p1, "s-maxage=0", 10) == 0)) {
- txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
- continue;
- }
-
- /* we have something of the form no-cache="set-cookie" */
- if ((cur_end - p1 >= 21) &&
- strncasecmp(p1, "no-cache=\"set-cookie", 20) == 0
- && (p1[20] == '"' || p1[20] == ','))
- txn->flags &= ~TX_CACHE_COOK;
- continue;
- }
-
- /* OK, so we know that either p2 points to the end of string or to a comma */
- if (((p2 - p1 == 7) && strncasecmp(p1, "private", 7) == 0) ||
- ((p2 - p1 == 8) && strncasecmp(p1, "no-cache", 8) == 0) ||
- ((p2 - p1 == 8) && strncasecmp(p1, "no-store", 8) == 0)) {
- txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
- return;
- }
-
- if ((p2 - p1 == 6) && strncasecmp(p1, "public", 6) == 0) {
- txn->flags |= TX_CACHEABLE | TX_CACHE_COOK;
- continue;
- }
- }
-}
-
-
-/*
- * In a GET, HEAD or POST request, check if the requested URI matches the stats uri
- * for the current backend.
- *
- * It is assumed that the request is either a HEAD, GET, or POST and that the
- * uri_auth field is valid.
- *
- * Returns 1 if stats should be provided, otherwise 0.
- */
-int stats_check_uri(struct stream_interface *si, struct http_txn *txn, struct proxy *backend)
-{
- struct uri_auth *uri_auth = backend->uri_auth;
- struct http_msg *msg = &txn->req;
- const char *uri = ci_head(msg->chn)+ msg->sl.rq.u;
-
- if (!uri_auth)
- return 0;
-
- if (txn->meth != HTTP_METH_GET && txn->meth != HTTP_METH_HEAD && txn->meth != HTTP_METH_POST)
- return 0;
-
- /* check URI size */
- if (uri_auth->uri_len > msg->sl.rq.u_l)
- return 0;
-
- if (memcmp(uri, uri_auth->uri_prefix, uri_auth->uri_len) != 0)
- return 0;
-
- return 1;
-}
-
-/* Append the description of what is present in error snapshot <es> into <out>.
- * The description must be small enough to always fit in a trash. The output
- * buffer may be the trash so the trash must not be used inside this function.
- */
-void http_show_error_snapshot(struct buffer *out, const struct error_snapshot *es)
-{
- chunk_appendf(out,
- " stream #%d, stream flags 0x%08x, tx flags 0x%08x\n"
- " HTTP msg state %s(%d), msg flags 0x%08x\n"
- " HTTP chunk len %lld bytes, HTTP body len %lld bytes, channel flags 0x%08x :\n",
- es->ctx.http.sid, es->ctx.http.s_flags, es->ctx.http.t_flags,
- h1_msg_state_str(es->ctx.http.state), es->ctx.http.state,
- es->ctx.http.m_flags, es->ctx.http.m_clen,
- es->ctx.http.m_blen, es->ctx.http.b_flags);
-}
-
-/*
- * Capture a bad request or response and archive it in the proxy's structure.
- * By default it tries to report the error position as msg->err_pos. However if
- * this one is not set, it will then report msg->next, which is the last known
- * parsing point. The function is able to deal with wrapping buffers. It always
- * displays buffers as a contiguous area starting at buf->p. The direction is
- * determined thanks to the channel's flags.
- */
-void http_capture_bad_message(struct proxy *proxy, struct stream *s,
- struct http_msg *msg,
- enum h1_state state, struct proxy *other_end)
-{
- union error_snapshot_ctx ctx;
- long ofs;
-
- /* http-specific part now */
- ctx.http.sid = s->uniq_id;
- ctx.http.state = state;
- ctx.http.b_flags = msg->chn->flags;
- ctx.http.s_flags = s->flags;
- ctx.http.t_flags = s->txn->flags;
- ctx.http.m_flags = msg->flags;
- ctx.http.m_clen = msg->chunk_len;
- ctx.http.m_blen = msg->body_len;
-
- ofs = msg->chn->total - ci_data(msg->chn);
- if (ofs < 0)
- ofs = 0;
-
- proxy_capture_error(proxy, !!(msg->chn->flags & CF_ISRESP),
- other_end, s->target,
- strm_sess(s), &msg->chn->buf,
- ofs, co_data(msg->chn),
- (msg->err_pos >= 0) ? msg->err_pos : msg->next,
- &ctx, http_show_error_snapshot);
-}
-
-/*
- * Print a debug line with a header. Always stop at the first CR or LF char,
- * so it is safe to pass it a full buffer if needed. If <err> is not NULL, an
- * arrow is printed after the line which contains the pointer.
- */
-void debug_hdr(const char *dir, struct stream *s, const char *start, const char *end)
-{
- struct session *sess = strm_sess(s);
- int max;
-
- chunk_printf(&trash, "%08x:%s.%s[%04x:%04x]: ", s->uniq_id, s->be->id,
- dir,
- objt_conn(sess->origin) ? (unsigned short)objt_conn(sess->origin)->handle.fd : -1,
- objt_cs(s->si[1].end) ? (unsigned short)objt_cs(s->si[1].end)->conn->handle.fd : -1);
-
- for (max = 0; start + max < end; max++)
- if (start[max] == '\r' || start[max] == '\n')
- break;
+DECLARE_POOL(pool_head_http_txn, "http_txn", sizeof(struct http_txn));
+DECLARE_POOL(pool_head_uniqueid, "uniqueid", UNIQUEID_LEN);
- UBOUND(max, trash.size - trash.data - 3);
- trash.data += strlcpy2(trash.area + trash.data, start, max + 1);
- trash.area[trash.data++] = '\n';
- shut_your_big_mouth_gcc(write(1, trash.area, trash.data));
-}
+struct pool_head *pool_head_requri = NULL;
+struct pool_head *pool_head_capture = NULL;
/* Allocate a new HTTP transaction for stream <s> unless there is one already.
- * The hdr_idx is allocated as well. In case of allocation failure, everything
- * allocated is freed and NULL is returned. Otherwise the new transaction is
- * assigned to the stream and returned.
+ * In case of allocation failure, everything allocated is freed and NULL is
+ * returned. Otherwise the new transaction is assigned to the stream and
+ * returned.
*/
struct http_txn *http_alloc_txn(struct stream *s)
{
if (!txn)
return txn;
- txn->hdr_idx.size = global.tune.max_http_hdr;
- txn->hdr_idx.v = pool_alloc(pool_head_hdr_idx);
- if (!txn->hdr_idx.v) {
- pool_free(pool_head_http_txn, txn);
- return NULL;
- }
-
s->txn = txn;
return txn;
}
void http_txn_reset_req(struct http_txn *txn)
{
txn->req.flags = 0;
- txn->req.sol = txn->req.eol = txn->req.eoh = 0; /* relative to the buffer */
- txn->req.next = 0;
- txn->req.chunk_len = 0LL;
- txn->req.body_len = 0LL;
txn->req.msg_state = HTTP_MSG_RQBEFORE; /* at the very beginning of the request */
}
void http_txn_reset_res(struct http_txn *txn)
{
txn->rsp.flags = 0;
- txn->rsp.sol = txn->rsp.eol = txn->rsp.eoh = 0; /* relative to the buffer */
- txn->rsp.next = 0;
- txn->rsp.chunk_len = 0LL;
- txn->rsp.body_len = 0LL;
txn->rsp.msg_state = HTTP_MSG_RPBEFORE; /* at the very beginning of the response */
}
void http_init_txn(struct stream *s)
{
struct http_txn *txn = s->txn;
- struct proxy *fe = strm_fe(s);
struct conn_stream *cs = objt_cs(s->si[0].end);
txn->flags = ((cs && cs->flags & CS_FL_NOT_FIRST)
txn->auth.method = HTTP_AUTH_UNKNOWN;
- txn->req.err_pos = txn->rsp.err_pos = -2; /* block buggy requests/responses */
- if (fe->options2 & PR_O2_REQBUG_OK)
- txn->req.err_pos = -1; /* let buggy requests pass */
-
- if (txn->hdr_idx.v)
- hdr_idx_init(&txn->hdr_idx);
-
vars_init(&s->vars_txn, SCOPE_TXN);
vars_init(&s->vars_reqres, SCOPE_REQ);
}
s->si[1].hcto = TICK_ETERNITY;
}
-/* This function executes one of the set-{method,path,query,uri} actions. It
- * takes the string from the variable 'replace' with length 'len', then modifies
- * the relevant part of the request line accordingly. Then it updates various
- * pointers to the next elements which were moved, and the total buffer length.
- * It finds the action to be performed in p[2], previously filled by function
- * parse_set_req_line(). It returns 0 in case of success, -1 in case of internal
- * error, though this can be revisited when this code is finally exploited.
- *
- * 'action' can be '0' to replace method, '1' to replace path, '2' to replace
- * query string and 3 to replace uri.
- *
- * In query string case, the mark question '?' must be set at the start of the
- * string by the caller, event if the replacement query string is empty.
- */
-int http_replace_req_line(int action, const char *replace, int len,
- struct proxy *px, struct stream *s)
-{
- struct http_txn *txn = s->txn;
- char *cur_ptr, *cur_end;
- int offset = 0;
- int delta;
-
- if (IS_HTX_STRM(s))
- return htx_req_replace_stline(action, replace, len, px, s);
-
- switch (action) {
- case 0: // method
- cur_ptr = ci_head(&s->req);
- cur_end = cur_ptr + txn->req.sl.rq.m_l;
-
- /* adjust req line offsets and lengths */
- delta = len - offset - (cur_end - cur_ptr);
- txn->req.sl.rq.m_l += delta;
- txn->req.sl.rq.u += delta;
- txn->req.sl.rq.v += delta;
- break;
-
- case 1: // path
- cur_ptr = http_txn_get_path(txn);
- if (!cur_ptr)
- cur_ptr = ci_head(&s->req) + txn->req.sl.rq.u;
-
- cur_end = cur_ptr;
- while (cur_end < ci_head(&s->req) + txn->req.sl.rq.u + txn->req.sl.rq.u_l && *cur_end != '?')
- cur_end++;
-
- /* adjust req line offsets and lengths */
- delta = len - offset - (cur_end - cur_ptr);
- txn->req.sl.rq.u_l += delta;
- txn->req.sl.rq.v += delta;
- break;
-
- case 2: // query
- offset = 1;
- cur_ptr = ci_head(&s->req) + txn->req.sl.rq.u;
- cur_end = cur_ptr + txn->req.sl.rq.u_l;
- while (cur_ptr < cur_end && *cur_ptr != '?')
- cur_ptr++;
-
- /* skip the question mark or indicate that we must insert it
- * (but only if the format string is not empty then).
- */
- if (cur_ptr < cur_end)
- cur_ptr++;
- else if (len > 1)
- offset = 0;
-
- /* adjust req line offsets and lengths */
- delta = len - offset - (cur_end - cur_ptr);
- txn->req.sl.rq.u_l += delta;
- txn->req.sl.rq.v += delta;
- break;
-
- case 3: // uri
- cur_ptr = ci_head(&s->req) + txn->req.sl.rq.u;
- cur_end = cur_ptr + txn->req.sl.rq.u_l;
-
- /* adjust req line offsets and lengths */
- delta = len - offset - (cur_end - cur_ptr);
- txn->req.sl.rq.u_l += delta;
- txn->req.sl.rq.v += delta;
- break;
-
- default:
- return -1;
- }
-
- /* commit changes and adjust end of message */
- delta = b_rep_blk(&s->req.buf, cur_ptr, cur_end, replace + offset, len - offset);
- txn->req.sl.rq.l += delta;
- txn->hdr_idx.v[0].len += delta;
- http_msg_move_end(&txn->req, delta);
- return 0;
-}
-
-/* This function replace the HTTP status code and the associated message. The
- * variable <status> contains the new status code. This function never fails.
- */
-void http_set_status(unsigned int status, const char *reason, struct stream *s)
-{
- struct http_txn *txn = s->txn;
- char *cur_ptr, *cur_end;
- int delta;
- char *res;
- int c_l;
- const char *msg = reason;
- int msg_len;
-
- if (IS_HTX_STRM(s))
- return htx_res_set_status(status, reason, s);
-
- chunk_reset(&trash);
-
- res = ultoa_o(status, trash.area, trash.size);
- c_l = res - trash.area;
-
- trash.area[c_l] = ' ';
- trash.data = c_l + 1;
-
- /* Do we have a custom reason format string? */
- if (msg == NULL)
- msg = http_get_reason(status);
- msg_len = strlen(msg);
- strncpy(&trash.area[trash.data], msg, trash.size - trash.data);
- trash.data += msg_len;
-
- cur_ptr = ci_head(&s->res) + txn->rsp.sl.st.c;
- cur_end = ci_head(&s->res) + txn->rsp.sl.st.r + txn->rsp.sl.st.r_l;
-
- /* commit changes and adjust message */
- delta = b_rep_blk(&s->res.buf, cur_ptr, cur_end, trash.area,
- trash.data);
-
- /* adjust res line offsets and lengths */
- txn->rsp.sl.st.r += c_l - txn->rsp.sl.st.c_l;
- txn->rsp.sl.st.c_l = c_l;
- txn->rsp.sl.st.r_l = msg_len;
-
- delta = trash.data - (cur_end - cur_ptr);
- txn->rsp.sl.st.l += delta;
- txn->hdr_idx.v[0].len += delta;
- http_msg_move_end(&txn->rsp, delta);
-}
-
/*
* Local variables:
* c-indent-level: 8
projects / thirdparty / haproxy.git / commitdiff
