#error "Check if your OS uses bitfields for fd_sets"
#endif
-int sess_update_st_con_tcp(struct session *s, struct stream_interface *si);
-int sess_update_st_cer(struct session *s, struct stream_interface *si);
-void sess_establish(struct session *s, struct stream_interface *si);
-void return_srv_error(struct session *s, int err_type);
-
void init_proto_http()
{
int i;
static char *cli_stnames[4] = { "DAT", "SHR", "SHW", "CLS" };
#endif
-static void http_sess_log(struct session *s);
-
/*
* Adds a header and its CRLF at the tail of buffer <b>, just before the last
* CRLF. Text length is measured first, so it cannot be NULL.
return ptr;
}
-
-/* Update stream interface status for input states SI_ST_ASS, SI_ST_QUE, SI_ST_TAR.
- * Other input states are simply ignored.
- * Possible output states are SI_ST_CLO, SI_ST_TAR, SI_ST_ASS, SI_ST_REQ, SI_ST_CON.
- * Flags must have previously been updated for timeouts and other conditions.
- */
-void sess_update_stream_int(struct session *s, struct stream_interface *si)
-{
- DPRINTF(stderr,"[%u] %s: sess=%p rq=%p, rp=%p, exp(r,w)=%u,%u rqf=%08x rpf=%08x rql=%d rpl=%d cs=%d ss=%d\n",
- now_ms, __FUNCTION__,
- s,
- s->req, s->rep,
- s->req->rex, s->rep->wex,
- s->req->flags, s->rep->flags,
- s->req->l, s->rep->l, s->rep->cons->state, s->req->cons->state);
-
- if (si->state == SI_ST_ASS) {
- /* Server assigned to connection request, we have to try to connect now */
- int conn_err;
-
- conn_err = connect_server(s);
- if (conn_err == SN_ERR_NONE) {
- /* state = SI_ST_CON now */
- return;
- }
-
- /* We have received a synchronous error. We might have to
- * abort, retry immediately or redispatch.
- */
- if (conn_err == SN_ERR_INTERNAL) {
- if (!si->err_type) {
- si->err_type = SI_ET_CONN_OTHER;
- si->err_loc = s->srv;
- }
-
- if (s->srv)
- s->srv->cum_sess++;
- if (s->srv)
- s->srv->failed_conns++;
- s->be->failed_conns++;
-
- /* release other sessions waiting for this server */
- if (may_dequeue_tasks(s->srv, s->be))
- process_srv_queue(s->srv);
-
- /* Failed and not retryable. */
- si->shutr(si);
- si->shutw(si);
- si->ob->flags |= BF_WRITE_ERROR;
-
- s->logs.t_queue = tv_ms_elapsed(&s->logs.tv_accept, &now);
-
- /* no session was ever accounted for this server */
- si->state = SI_ST_CLO;
- return_srv_error(s, si->err_type);
- return;
- }
-
- /* We are facing a retryable error, but we don't want to run a
- * turn-around now, as the problem is likely a source port
- * allocation problem, so we want to retry now.
- */
- si->state = SI_ST_CER;
- si->flags &= ~SI_FL_ERR;
- sess_update_st_cer(s, si);
- /* now si->state is one of SI_ST_CLO, SI_ST_TAR, SI_ST_ASS, SI_ST_REQ */
- return;
- }
- else if (si->state == SI_ST_QUE) {
- /* connection request was queued, check for any update */
- if (!s->pend_pos) {
- /* The connection is not in the queue anymore. Either
- * we have a server connection slot available and we
- * go directly to the assigned state, or we need to
- * load-balance first and go to the INI state.
- */
- si->exp = TICK_ETERNITY;
- if (unlikely(!(s->flags & SN_ASSIGNED)))
- si->state = SI_ST_REQ;
- else {
- s->logs.t_queue = tv_ms_elapsed(&s->logs.tv_accept, &now);
- si->state = SI_ST_ASS;
- }
- return;
- }
-
- /* Connection request still in queue... */
- if (si->flags & SI_FL_EXP) {
- /* ... and timeout expired */
- si->exp = TICK_ETERNITY;
- s->logs.t_queue = tv_ms_elapsed(&s->logs.tv_accept, &now);
- if (s->srv)
- s->srv->failed_conns++;
- s->be->failed_conns++;
- si->shutr(si);
- si->shutw(si);
- si->ob->flags |= BF_WRITE_TIMEOUT;
- if (!si->err_type)
- si->err_type = SI_ET_QUEUE_TO;
- si->state = SI_ST_CLO;
- return_srv_error(s, si->err_type);
- return;
- }
-
- /* Connection remains in queue, check if we have to abort it */
- if ((si->ob->flags & (BF_READ_ERROR|BF_SHUTW_NOW)) || /* abort requested */
- ((si->ob->flags & BF_SHUTR) && /* empty and client stopped */
- (si->ob->flags & BF_EMPTY || s->be->options & PR_O_ABRT_CLOSE))) {
- /* give up */
- si->exp = TICK_ETERNITY;
- s->logs.t_queue = tv_ms_elapsed(&s->logs.tv_accept, &now);
- si->shutr(si);
- si->shutw(si);
- si->err_type |= SI_ET_QUEUE_ABRT;
- si->state = SI_ST_CLO;
- return_srv_error(s, si->err_type);
- return;
- }
-
- /* Nothing changed */
- return;
- }
- else if (si->state == SI_ST_TAR) {
- /* Connection request might be aborted */
- if ((si->ob->flags & (BF_READ_ERROR|BF_SHUTW_NOW)) || /* abort requested */
- ((si->ob->flags & BF_SHUTR) && /* empty and client stopped */
- (si->ob->flags & BF_EMPTY || s->be->options & PR_O_ABRT_CLOSE))) {
- /* give up */
- si->exp = TICK_ETERNITY;
- si->shutr(si);
- si->shutw(si);
- si->err_type |= SI_ET_CONN_ABRT;
- si->state = SI_ST_CLO;
- return_srv_error(s, si->err_type);
- return;
- }
-
- if (!(si->flags & SI_FL_EXP))
- return; /* still in turn-around */
-
- si->exp = TICK_ETERNITY;
-
- /* we keep trying on the same server as long as the session is
- * marked "assigned".
- * FIXME: Should we force a redispatch attempt when the server is down ?
- */
- if (s->flags & SN_ASSIGNED)
- si->state = SI_ST_ASS;
- else
- si->state = SI_ST_REQ;
- return;
- }
-}
-
-
/* Returns a 302 for a redirectable request. 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.
*/
-static void perform_http_redirect(struct session *s, struct stream_interface *si)
+void perform_http_redirect(struct session *s, struct stream_interface *si)
{
struct http_txn *txn;
struct chunk rdr;
s->srv->cum_sess++;
}
-
-/* This function initiates a server connection request on a stream interface
- * already in SI_ST_REQ state. Upon success, the state goes to SI_ST_ASS,
- * indicating that a server has been assigned. It may also return SI_ST_QUE,
- * or SI_ST_CLO upon error.
- */
-static void sess_prepare_conn_req(struct session *s, struct stream_interface *si) {
- DPRINTF(stderr,"[%u] %s: sess=%p rq=%p, rp=%p, exp(r,w)=%u,%u rqf=%08x rpf=%08x rql=%d rpl=%d cs=%d ss=%d\n",
- now_ms, __FUNCTION__,
- s,
- s->req, s->rep,
- s->req->rex, s->rep->wex,
- s->req->flags, s->rep->flags,
- s->req->l, s->rep->l, s->rep->cons->state, s->req->cons->state);
-
- if (si->state != SI_ST_REQ)
- return;
-
- /* Try to assign a server */
- if (srv_redispatch_connect(s) != 0) {
- /* We did not get a server. Either we queued the
- * connection request, or we encountered an error.
- */
- if (si->state == SI_ST_QUE)
- return;
-
- /* we did not get any server, let's check the cause */
- si->shutr(si);
- si->shutw(si);
- si->ob->flags |= BF_WRITE_ERROR;
- if (!si->err_type)
- si->err_type = SI_ET_CONN_OTHER;
- si->state = SI_ST_CLO;
- return_srv_error(s, si->err_type);
- return;
- }
-
- /* The server is assigned */
- s->logs.t_queue = tv_ms_elapsed(&s->logs.tv_accept, &now);
- si->state = SI_ST_ASS;
-}
-
-
/* Return the error message corresponding to 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
500, error_message(s, HTTP_ERR_500));
}
-/* Processes the client, server, request and response jobs of a session task,
- * then puts it back to the wait queue in a clean state, or cleans up its
- * resources if it must be deleted. Returns in <next> the date the task wants
- * to be woken up, or TICK_ETERNITY. In order not to call all functions for
- * nothing too many times, the request and response buffers flags are monitored
- * and each function is called only if at least another function has changed at
- * least one flag it is interested in.
- */
-void process_session(struct task *t, int *next)
-{
- struct session *s = t->context;
- int resync;
- unsigned int rqf_last, rpf_last;
-
- //DPRINTF(stderr, "%s:%d: cs=%d ss=%d(%d) rqf=0x%08x rpf=0x%08x\n", __FUNCTION__, __LINE__,
- // s->si[0].state, s->si[1].state, s->si[1].err_type, s->req->flags, s->rep->flags);
-
- /* 1a: Check for low level timeouts if needed. We just set a flag on
- * stream interfaces when their timeouts have expired.
- */
- if (unlikely(t->state & TASK_WOKEN_TIMER)) {
- stream_int_check_timeouts(&s->si[0]);
- stream_int_check_timeouts(&s->si[1]);
- buffer_check_timeouts(s->req);
- buffer_check_timeouts(s->rep);
- }
-
- /* copy req/rep flags so that we can detect shutdowns */
- rqf_last = s->req->flags;
- rpf_last = s->rep->flags;
-
- /* 1b: check for low-level errors reported at the stream interface.
- * First we check if it's a retryable error (in which case we don't
- * want to tell the buffer). Otherwise we report the error one level
- * upper by setting flags into the buffers. Note that the side towards
- * the client cannot have connect (hence retryable) errors. Also, the
- * connection setup code must be able to deal with any type of abort.
- */
- if (unlikely(s->si[0].flags & SI_FL_ERR)) {
- if (s->si[0].state == SI_ST_EST || s->si[0].state == SI_ST_DIS) {
- s->si[0].shutr(&s->si[0]);
- s->si[0].shutw(&s->si[0]);
- stream_int_report_error(&s->si[0]);
- }
- }
-
- if (unlikely(s->si[1].flags & SI_FL_ERR)) {
- if (s->si[1].state == SI_ST_EST || s->si[1].state == SI_ST_DIS) {
- s->si[1].shutr(&s->si[1]);
- s->si[1].shutw(&s->si[1]);
- stream_int_report_error(&s->si[1]);
- s->be->failed_resp++;
- if (s->srv)
- s->srv->failed_resp++;
- }
- /* note: maybe we should process connection errors here ? */
- }
-
- if (s->si[1].state == SI_ST_CON) {
- /* we were trying to establish a connection on the server side,
- * maybe it succeeded, maybe it failed, maybe we timed out, ...
- */
- if (unlikely(!sess_update_st_con_tcp(s, &s->si[1])))
- sess_update_st_cer(s, &s->si[1]);
- else if (s->si[1].state == SI_ST_EST)
- sess_establish(s, &s->si[1]);
-
- /* state is now one of SI_ST_CON (still in progress), SI_ST_EST
- * (established), SI_ST_DIS (abort), SI_ST_CLO (last error),
- * SI_ST_ASS/SI_ST_TAR/SI_ST_REQ for retryable errors.
- */
- }
-
- /* check buffer timeouts, and close the corresponding stream interfaces
- * for future reads or writes. Note: this will also concern upper layers
- * but we do not touch any other flag. We must be careful and correctly
- * detect state changes when calling them.
- */
- if (unlikely(s->req->flags & (BF_READ_TIMEOUT|BF_WRITE_TIMEOUT))) {
- if (s->req->flags & BF_READ_TIMEOUT)
- s->req->prod->shutr(s->req->prod);
- if (s->req->flags & BF_WRITE_TIMEOUT)
- s->req->cons->shutw(s->req->cons);
- DPRINTF(stderr,
- "[%u] %s:%d: task=%p s=%p, sfl=0x%08x, rq=%p, rp=%p, exp(r,w)=%u,%u rqf=%08x rpf=%08x rql=%d rpl=%d cs=%d ss=%d, cet=0x%x set=0x%x retr=%d\n",
- now_ms, __FUNCTION__, __LINE__,
- t,
- s, s->flags,
- s->req, s->rep,
- s->req->rex, s->rep->wex,
- s->req->flags, s->rep->flags,
- s->req->l, s->rep->l, s->rep->cons->state, s->req->cons->state,
- s->rep->cons->err_type, s->req->cons->err_type,
- s->conn_retries);
- }
-
- if (unlikely(s->rep->flags & (BF_READ_TIMEOUT|BF_WRITE_TIMEOUT))) {
- if (s->rep->flags & BF_READ_TIMEOUT)
- s->rep->prod->shutr(s->rep->prod);
- if (s->rep->flags & BF_WRITE_TIMEOUT)
- s->rep->cons->shutw(s->rep->cons);
- DPRINTF(stderr,
- "[%u] %s:%d: task=%p s=%p, sfl=0x%08x, rq=%p, rp=%p, exp(r,w)=%u,%u rqf=%08x rpf=%08x rql=%d rpl=%d cs=%d ss=%d, cet=0x%x set=0x%x retr=%d\n",
- now_ms, __FUNCTION__, __LINE__,
- t,
- s, s->flags,
- s->req, s->rep,
- s->req->rex, s->rep->wex,
- s->req->flags, s->rep->flags,
- s->req->l, s->rep->l, s->rep->cons->state, s->req->cons->state,
- s->rep->cons->err_type, s->req->cons->err_type,
- s->conn_retries);
- }
-
- /* Check for connection closure */
-
-resync_stream_interface:
- DPRINTF(stderr,
- "[%u] %s:%d: task=%p s=%p, sfl=0x%08x, rq=%p, rp=%p, exp(r,w)=%u,%u rqf=%08x rpf=%08x rql=%d rpl=%d cs=%d ss=%d, cet=0x%x set=0x%x retr=%d\n",
- now_ms, __FUNCTION__, __LINE__,
- t,
- s, s->flags,
- s->req, s->rep,
- s->req->rex, s->rep->wex,
- s->req->flags, s->rep->flags,
- s->req->l, s->rep->l, s->rep->cons->state, s->req->cons->state,
- s->rep->cons->err_type, s->req->cons->err_type,
- s->conn_retries);
-
- /* nothing special to be done on client side */
- if (unlikely(s->req->prod->state == SI_ST_DIS))
- s->req->prod->state = SI_ST_CLO;
-
- /* When a server-side connection is released, we have to count it and
- * check for pending connections on this server.
- */
- if (unlikely(s->req->cons->state == SI_ST_DIS)) {
- s->req->cons->state = SI_ST_CLO;
- if (s->srv) {
- if (s->flags & SN_CURR_SESS) {
- s->flags &= ~SN_CURR_SESS;
- s->srv->cur_sess--;
- }
- sess_change_server(s, NULL);
- if (may_dequeue_tasks(s->srv, s->be))
- process_srv_queue(s->srv);
- }
- }
-
- /*
- * Note: of the transient states (REQ, CER, DIS), only REQ may remain
- * at this point.
- */
-
- /**** Process layer 7 below ****/
-
- resync = 0;
-
- /* Analyse request */
- if ((s->req->flags & BF_MASK_ANALYSER) ||
- (s->req->flags ^ rqf_last) & BF_MASK_STATIC) {
- unsigned int flags = s->req->flags;
-
- if (s->req->prod->state >= SI_ST_EST) {
- /* it's up to the analysers to reset write_ena */
- buffer_write_ena(s->req);
- if (s->req->analysers)
- process_request(s);
- }
- s->req->flags &= BF_CLEAR_READ & BF_CLEAR_WRITE & BF_CLEAR_TIMEOUT;
- flags &= BF_CLEAR_READ & BF_CLEAR_WRITE & BF_CLEAR_TIMEOUT;
- if (s->req->flags != flags)
- resync = 1;
- }
-
- /* reflect what the L7 analysers have seen last */
- rqf_last = s->req->flags;
-
- /*
- * Now forward all shutdown requests between both sides of the buffer
- */
-
- /* first, let's check if the request buffer needs to shutdown(write) */
- if (unlikely((s->req->flags & (BF_SHUTW|BF_SHUTW_NOW|BF_EMPTY|BF_HIJACK|BF_WRITE_ENA|BF_SHUTR)) ==
- (BF_EMPTY|BF_WRITE_ENA|BF_SHUTR)))
- buffer_shutw_now(s->req);
- else if ((s->req->flags & (BF_SHUTW|BF_SHUTW_NOW|BF_EMPTY|BF_WRITE_ENA)) == (BF_EMPTY|BF_WRITE_ENA) &&
- (s->req->cons->state == SI_ST_EST) &&
- s->be->options & PR_O_FORCE_CLO &&
- s->rep->flags & BF_READ_ACTIVITY) {
- /* We want to force the connection to the server to close,
- * and the server has begun to respond. That's the right
- * time.
- */
- buffer_shutw_now(s->req);
- }
-
- /* shutdown(write) pending */
- if (unlikely((s->req->flags & (BF_SHUTW|BF_SHUTW_NOW)) == BF_SHUTW_NOW))
- s->req->cons->shutw(s->req->cons);
-
- /* shutdown(write) done on server side, we must stop the client too */
- if (unlikely((s->req->flags & (BF_SHUTW|BF_SHUTR|BF_SHUTR_NOW)) == BF_SHUTW))
- buffer_shutr_now(s->req);
-
- /* shutdown(read) pending */
- if (unlikely((s->req->flags & (BF_SHUTR|BF_SHUTR_NOW)) == BF_SHUTR_NOW))
- s->req->prod->shutr(s->req->prod);
-
- /* it's possible that an upper layer has requested a connection setup */
- if (s->req->cons->state == SI_ST_INI &&
- (s->req->flags & (BF_WRITE_ENA|BF_SHUTW|BF_SHUTW_NOW)) == BF_WRITE_ENA)
- s->req->cons->state = SI_ST_REQ;
-
- /* we may have a pending connection request, or a connection waiting
- * for completion.
- */
- if (s->si[1].state >= SI_ST_REQ && s->si[1].state < SI_ST_CON) {
- do {
- /* nb: step 1 might switch from QUE to ASS, but we first want
- * to give a chance to step 2 to perform a redirect if needed.
- */
- if (s->si[1].state != SI_ST_REQ)
- sess_update_stream_int(s, &s->si[1]);
- if (s->si[1].state == SI_ST_REQ)
- sess_prepare_conn_req(s, &s->si[1]);
-
- if (s->si[1].state == SI_ST_ASS && s->srv &&
- s->srv->rdr_len && (s->flags & SN_REDIRECTABLE))
- perform_http_redirect(s, &s->si[1]);
- } while (s->si[1].state == SI_ST_ASS);
- }
-
- /*
- * Here we want to check if we need to resync or not.
- */
- if ((s->req->flags ^ rqf_last) & BF_MASK_STATIC)
- resync = 1;
-
- s->req->flags &= BF_CLEAR_READ & BF_CLEAR_WRITE & BF_CLEAR_TIMEOUT;
-
- /* according to benchmarks, it makes sense to resync now */
- if (resync)
- goto resync_stream_interface;
-
-
- /* Analyse response */
-
- if (unlikely(s->rep->flags & BF_HIJACK)) {
- /* In inject mode, we wake up everytime something has
- * happened on the write side of the buffer.
- */
- unsigned int flags = s->rep->flags;
-
- if ((s->rep->flags & (BF_WRITE_PARTIAL|BF_WRITE_ERROR|BF_SHUTW)) &&
- !(s->rep->flags & BF_FULL)) {
- produce_content(s);
- }
- s->rep->flags &= BF_CLEAR_READ & BF_CLEAR_WRITE & BF_CLEAR_TIMEOUT;
- flags &= BF_CLEAR_READ & BF_CLEAR_WRITE & BF_CLEAR_TIMEOUT;
- if (s->rep->flags != flags)
- resync = 1;
- }
- else if ((s->rep->flags & BF_MASK_ANALYSER) ||
- (s->rep->flags ^ rpf_last) & BF_MASK_STATIC) {
- unsigned int flags = s->rep->flags;
-
- if (s->rep->prod->state >= SI_ST_EST) {
- /* it's up to the analysers to reset write_ena */
- buffer_write_ena(s->rep);
- if (s->rep->analysers)
- process_response(s);
- }
- s->rep->flags &= BF_CLEAR_READ & BF_CLEAR_WRITE & BF_CLEAR_TIMEOUT;
- flags &= BF_CLEAR_READ & BF_CLEAR_WRITE & BF_CLEAR_TIMEOUT;
- if (s->rep->flags != flags)
- resync = 1;
- }
-
- /* reflect what the L7 analysers have seen last */
- rpf_last = s->rep->flags;
-
- /*
- * Now forward all shutdown requests between both sides of the buffer
- */
-
- /*
- * FIXME: this is probably where we should produce error responses.
- */
-
- /* first, let's check if the request buffer needs to shutdown(write) */
- if (unlikely((s->rep->flags & (BF_SHUTW|BF_SHUTW_NOW|BF_EMPTY|BF_HIJACK|BF_WRITE_ENA|BF_SHUTR)) ==
- (BF_EMPTY|BF_WRITE_ENA|BF_SHUTR)))
- buffer_shutw_now(s->rep);
-
- /* shutdown(write) pending */
- if (unlikely((s->rep->flags & (BF_SHUTW|BF_SHUTW_NOW)) == BF_SHUTW_NOW))
- s->rep->cons->shutw(s->rep->cons);
-
- /* shutdown(write) done on the client side, we must stop the server too */
- if (unlikely((s->rep->flags & (BF_SHUTW|BF_SHUTR|BF_SHUTR_NOW)) == BF_SHUTW))
- buffer_shutr_now(s->rep);
-
- /* shutdown(read) pending */
- if (unlikely((s->rep->flags & (BF_SHUTR|BF_SHUTR_NOW)) == BF_SHUTR_NOW))
- s->rep->prod->shutr(s->rep->prod);
-
- /*
- * Here we want to check if we need to resync or not.
- */
- if ((s->rep->flags ^ rpf_last) & BF_MASK_STATIC)
- resync = 1;
-
- s->rep->flags &= BF_CLEAR_READ & BF_CLEAR_WRITE & BF_CLEAR_TIMEOUT;
-
- if (resync)
- goto resync_stream_interface;
-
-
- /* This is needed only when debugging is enabled, to indicate
- * client-side or server-side close. Please note that in the unlikely
- * event where both sides would close at once, the sequence is reported
- * on the server side first.
- */
- if (unlikely((global.mode & MODE_DEBUG) &&
- (!(global.mode & MODE_QUIET) ||
- (global.mode & MODE_VERBOSE)))) {
- int len;
-
- if (s->si[1].state == SI_ST_CLO &&
- s->si[1].prev_state == SI_ST_EST) {
- len = sprintf(trash, "%08x:%s.srvcls[%04x:%04x]\n",
- s->uniq_id, s->be->id,
- (unsigned short)s->si[0].fd,
- (unsigned short)s->si[1].fd);
- write(1, trash, len);
- }
-
- if (s->si[0].state == SI_ST_CLO &&
- s->si[0].prev_state == SI_ST_EST) {
- len = sprintf(trash, "%08x:%s.clicls[%04x:%04x]\n",
- s->uniq_id, s->be->id,
- (unsigned short)s->si[0].fd,
- (unsigned short)s->si[1].fd);
- write(1, trash, len);
- }
- }
-
- if (likely((s->rep->cons->state != SI_ST_CLO) ||
- (s->req->cons->state > SI_ST_INI && s->req->cons->state < SI_ST_CLO))) {
-
- if ((s->fe->options & PR_O_CONTSTATS) && (s->flags & SN_BE_ASSIGNED))
- session_process_counters(s);
-
- if (s->rep->cons->state == SI_ST_EST)
- stream_sock_data_finish(s->rep->cons->fd);
-
- if (s->req->cons->state == SI_ST_EST)
- stream_sock_data_finish(s->req->cons->fd);
-
- s->req->flags &= BF_CLEAR_READ & BF_CLEAR_WRITE & BF_CLEAR_TIMEOUT;
- s->rep->flags &= BF_CLEAR_READ & BF_CLEAR_WRITE & BF_CLEAR_TIMEOUT;
- s->si[0].prev_state = s->si[0].state;
- s->si[1].prev_state = s->si[1].state;
- s->si[0].flags = s->si[1].flags = SI_FL_NONE;
-
- /* Trick: if a request is being waiting for the server to respond,
- * and if we know the server can timeout, we don't want the timeout
- * to expire on the client side first, but we're still interested
- * in passing data from the client to the server (eg: POST). Thus,
- * we can cancel the client's request timeout if the server's
- * request timeout is set and the server has not yet sent a response.
- */
-
- if ((s->rep->flags & (BF_WRITE_ENA|BF_SHUTR)) == 0 &&
- (tick_isset(s->req->wex) || tick_isset(s->rep->rex)))
- s->req->rex = TICK_ETERNITY;
-
- t->expire = tick_first(tick_first(s->req->rex, s->req->wex),
- tick_first(s->rep->rex, s->rep->wex));
- if (s->req->analysers)
- t->expire = tick_first(t->expire, s->req->analyse_exp);
-
- if (s->si[0].exp)
- t->expire = tick_first(t->expire, s->si[0].exp);
-
- if (s->si[1].exp)
- t->expire = tick_first(t->expire, s->si[1].exp);
-
-#ifdef DEBUG_FULL
- fprintf(stderr, "[%u] queuing with exp=%u req->rex=%u req->wex=%u req->ana_exp=%u rep->rex=%u rep->wex=%u, cs=%d, ss=%d\n",
- now_ms, t->expire, s->req->rex, s->req->wex, s->req->analyse_exp, s->rep->rex, s->rep->wex, s->si[0].state, s->si[1].state);
-#endif
- /* restore t to its place in the task list */
- task_queue(t);
-
-#ifdef DEBUG_DEV
- /* this may only happen when no timeout is set or in case of an FSM bug */
- if (!t->expire)
- ABORT_NOW();
-#endif
- *next = t->expire;
- return; /* nothing more to do */
- }
-
- s->fe->feconn--;
- if (s->flags & SN_BE_ASSIGNED)
- s->be->beconn--;
- actconn--;
-
- if (unlikely((global.mode & MODE_DEBUG) &&
- (!(global.mode & MODE_QUIET) || (global.mode & MODE_VERBOSE)))) {
- int len;
- len = sprintf(trash, "%08x:%s.closed[%04x:%04x] (term_trace=0x%08x)\n",
- s->uniq_id, s->be->id,
- (unsigned short)s->req->prod->fd, (unsigned short)s->req->cons->fd,
- s->term_trace);
- write(1, trash, len);
- }
-
- s->logs.t_close = tv_ms_elapsed(&s->logs.tv_accept, &now);
- session_process_counters(s);
-
- /* let's do a final log if we need it */
- if (s->logs.logwait &&
- !(s->flags & SN_MONITOR) &&
- (!(s->fe->options & PR_O_NULLNOLOG) || s->req->total)) {
- if (s->fe->to_log & LW_REQ)
- http_sess_log(s);
- else
- tcp_sess_log(s);
- }
-
- /* the task MUST not be in the run queue anymore */
- task_delete(t);
- session_free(s);
- task_free(t);
- *next = TICK_ETERNITY;
-}
-
-
extern const char sess_term_cond[8];
extern const char sess_fin_state[8];
extern const char *monthname[12];
* send a log for the session when we have enough info about it.
* Will not log if the frontend has no log defined.
*/
-static void http_sess_log(struct session *s)
+void http_sess_log(struct session *s)
{
char pn[INET6_ADDRSTRLEN + strlen(":65535")];
struct proxy *fe = s->fe;
return 0;
}
-
-/* This function is called with (si->state == SI_ST_CON) meaning that a
- * connection was attempted and that the file descriptor is already allocated.
- * We must check for establishment, error and abort. Possible output states
- * are SI_ST_EST (established), SI_ST_CER (error), SI_ST_DIS (abort), and
- * SI_ST_CON (no change). The function returns 0 if it switches to SI_ST_CER,
- * otherwise 1.
- */
-int sess_update_st_con_tcp(struct session *s, struct stream_interface *si)
-{
- struct buffer *req = si->ob;
- struct buffer *rep = si->ib;
-
- DPRINTF(stderr,"[%u] %s: c=%s exp(r,w)=%u,%u req=%08x rep=%08x rql=%d rpl=%d, fds=%d\n",
- now_ms, __FUNCTION__,
- cli_stnames[s->cli_state],
- rep->rex, req->wex,
- req->flags, rep->flags,
- req->l, rep->l,
- fdtab[si->fd].state);
-
-
- /* If we got an error, or if nothing happened and the connection timed
- * out, we must give up. The CER state handler will take care of retry
- * attempts and error reports.
- */
- if (unlikely(si->flags & (SI_FL_EXP|SI_FL_ERR))) {
- si->state = SI_ST_CER;
- fd_delete(si->fd);
-
- if (si->err_type)
- return 0;
-
- si->err_loc = s->srv;
- if (si->flags & SI_FL_ERR)
- si->err_type = SI_ET_CONN_ERR;
- else
- si->err_type = SI_ET_CONN_TO;
- return 0;
- }
-
- /* OK, maybe we want to abort */
- if (unlikely((req->flags & BF_SHUTW_NOW) ||
- (rep->flags & BF_SHUTW) ||
- ((req->flags & BF_SHUTR) && /* FIXME: this should not prevent a connection from establishing */
- ((req->flags & BF_EMPTY && !(req->flags & BF_WRITE_ACTIVITY)) ||
- s->be->options & PR_O_ABRT_CLOSE)))) {
- /* give up */
- si->shutw(si);
- si->err_type |= SI_ET_CONN_ABRT;
- si->err_loc = s->srv;
- return 1;
- }
-
- /* we need to wait a bit more if there was no activity either */
- if (!(req->flags & BF_WRITE_ACTIVITY))
- return 1;
-
- /* OK, this means that a connection succeeded. The caller will be
- * responsible for handling the transition from CON to EST.
- */
- s->logs.t_connect = tv_ms_elapsed(&s->logs.tv_accept, &now);
- si->state = SI_ST_EST;
- si->err_type = SI_ET_NONE;
- si->err_loc = NULL;
- return 1;
-}
-
-
-/*
- * This function handles the transition between the SI_ST_CON state and the
- * SI_ST_EST state. It must only be called after switching from SI_ST_CON to
- * SI_ST_EST.
- */
-void sess_establish(struct session *s, struct stream_interface *si)
-{
- struct buffer *req = si->ob;
- struct buffer *rep = si->ib;
-
- if (req->flags & BF_EMPTY) {
- EV_FD_CLR(si->fd, DIR_WR);
- req->wex = TICK_ETERNITY;
- } else {
- EV_FD_SET(si->fd, DIR_WR);
- req->wex = tick_add_ifset(now_ms, s->be->timeout.server);
- if (tick_isset(req->wex)) {
- /* FIXME: to prevent the server from expiring read
- * timeouts during writes, we refresh it. */
- rep->rex = req->wex;
- }
- }
-
- if (s->be->mode == PR_MODE_TCP) { /* let's allow immediate data connection in this case */
- if (!(rep->flags & BF_HIJACK)) {
- EV_FD_SET(si->fd, DIR_RD);
- rep->rex = tick_add_ifset(now_ms, s->be->timeout.server);
- }
- buffer_set_rlim(rep, BUFSIZE); /* no rewrite needed */
-
- /* if the user wants to log as soon as possible, without counting
- * bytes from the server, then this is the right moment. */
- if (s->fe->to_log && !(s->logs.logwait & LW_BYTES)) {
- s->logs.t_close = s->logs.t_connect; /* to get a valid end date */
- tcp_sess_log(s);
- }
-#ifdef CONFIG_HAP_TCPSPLICE
- if ((s->fe->options & s->be->options) & PR_O_TCPSPLICE) {
- /* TCP splicing supported by both FE and BE */
- tcp_splice_splicefd(req->prod->fd, si->fd, 0);
- }
-#endif
- }
- else {
- rep->analysers |= AN_RTR_HTTP_HDR;
- buffer_set_rlim(rep, BUFSIZE - MAXREWRITE); /* rewrite needed */
- s->txn.rsp.msg_state = HTTP_MSG_RPBEFORE;
- /* reset hdr_idx which was already initialized by the request.
- * right now, the http parser does it.
- * hdr_idx_init(&s->txn.hdr_idx);
- */
- }
-
- rep->flags |= BF_READ_ATTACHED; /* producer is now attached */
- req->wex = TICK_ETERNITY;
-}
-
-
-/* This function is called with (si->state == SI_ST_CER) meaning that a
- * previous connection attempt has failed and that the file descriptor
- * has already been released. Possible causes include asynchronous error
- * notification and time out. Possible output states are SI_ST_CLO when
- * retries are exhausted, SI_ST_TAR when a delay is wanted before a new
- * connection attempt, SI_ST_ASS when it's wise to retry on the same server,
- * and SI_ST_REQ when an immediate redispatch is wanted. The buffers are
- * marked as in error state. It returns 0.
- */
-int sess_update_st_cer(struct session *s, struct stream_interface *si)
-{
- /* we probably have to release last session from the server */
- if (s->srv) {
- if (s->flags & SN_CURR_SESS) {
- s->flags &= ~SN_CURR_SESS;
- s->srv->cur_sess--;
- }
- sess_change_server(s, NULL);
- }
-
- /* ensure that we have enough retries left */
- s->conn_retries--;
- if (s->conn_retries < 0) {
- if (!si->err_type) {
- si->err_type = SI_ET_CONN_ERR;
- si->err_loc = s->srv;
- }
-
- if (s->srv)
- s->srv->failed_conns++;
- s->be->failed_conns++;
- if (may_dequeue_tasks(s->srv, s->be))
- process_srv_queue(s->srv);
-
- /* shutw is enough so stop a connecting socket */
- si->shutw(si);
- si->ob->flags |= BF_WRITE_ERROR;
- si->ib->flags |= BF_READ_ERROR;
-
- si->state = SI_ST_CLO;
- return_srv_error(s, si->err_type);
- return 0;
- }
-
- /* If the "redispatch" option is set on the backend, we are allowed to
- * retry on another server for the last retry. In order to achieve this,
- * we must mark the session unassigned, and eventually clear the DIRECT
- * bit to ignore any persistence cookie. We won't count a retry nor a
- * redispatch yet, because this will depend on what server is selected.
- */
- if (s->srv && s->conn_retries == 0 && s->be->options & PR_O_REDISP) {
- if (may_dequeue_tasks(s->srv, s->be))
- process_srv_queue(s->srv);
-
- s->flags &= ~(SN_DIRECT | SN_ASSIGNED | SN_ADDR_SET);
- s->prev_srv = s->srv;
- si->state = SI_ST_REQ;
- } else {
- if (s->srv)
- s->srv->retries++;
- s->be->retries++;
- si->state = SI_ST_ASS;
- }
-
- if (si->flags & SI_FL_ERR) {
- /* The error was an asynchronous connection error, and we will
- * likely have to retry connecting to the same server, most
- * likely leading to the same result. To avoid this, we wait
- * one second before retrying.
- */
-
- if (!si->err_type)
- si->err_type = SI_ET_CONN_ERR;
-
- si->state = SI_ST_TAR;
- si->exp = tick_add(now_ms, MS_TO_TICKS(1000));
- return 0;
- }
- return 0;
-}
-
-
/*
* Produces data for the session <s> depending on its source. Expects to be
* called with client socket shut down on input. Right now, only statistics can
#include <common/memory.h>
#include <types/capture.h>
+#include <types/global.h>
+#include <proto/backend.h>
#include <proto/buffers.h>
#include <proto/hdr_idx.h>
#include <proto/log.h>
#include <proto/session.h>
+#include <proto/proto_http.h>
+#include <proto/proto_tcp.h>
#include <proto/queue.h>
+#include <proto/stream_interface.h>
+#include <proto/stream_sock.h>
+#include <proto/task.h>
struct pool_head *pool2_session;
}
}
+/* This function is called with (si->state == SI_ST_CON) meaning that a
+ * connection was attempted and that the file descriptor is already allocated.
+ * We must check for establishment, error and abort. Possible output states
+ * are SI_ST_EST (established), SI_ST_CER (error), SI_ST_DIS (abort), and
+ * SI_ST_CON (no change). The function returns 0 if it switches to SI_ST_CER,
+ * otherwise 1.
+ */
+int sess_update_st_con_tcp(struct session *s, struct stream_interface *si)
+{
+ struct buffer *req = si->ob;
+ struct buffer *rep = si->ib;
+
+ DPRINTF(stderr,"[%u] %s: c=%s exp(r,w)=%u,%u req=%08x rep=%08x rql=%d rpl=%d, fds=%d\n",
+ now_ms, __FUNCTION__,
+ cli_stnames[s->cli_state],
+ rep->rex, req->wex,
+ req->flags, rep->flags,
+ req->l, rep->l,
+ fdtab[si->fd].state);
+
+
+ /* If we got an error, or if nothing happened and the connection timed
+ * out, we must give up. The CER state handler will take care of retry
+ * attempts and error reports.
+ */
+ if (unlikely(si->flags & (SI_FL_EXP|SI_FL_ERR))) {
+ si->state = SI_ST_CER;
+ fd_delete(si->fd);
+
+ if (si->err_type)
+ return 0;
+
+ si->err_loc = s->srv;
+ if (si->flags & SI_FL_ERR)
+ si->err_type = SI_ET_CONN_ERR;
+ else
+ si->err_type = SI_ET_CONN_TO;
+ return 0;
+ }
+
+ /* OK, maybe we want to abort */
+ if (unlikely((req->flags & BF_SHUTW_NOW) ||
+ (rep->flags & BF_SHUTW) ||
+ ((req->flags & BF_SHUTR) && /* FIXME: this should not prevent a connection from establishing */
+ ((req->flags & BF_EMPTY && !(req->flags & BF_WRITE_ACTIVITY)) ||
+ s->be->options & PR_O_ABRT_CLOSE)))) {
+ /* give up */
+ si->shutw(si);
+ si->err_type |= SI_ET_CONN_ABRT;
+ si->err_loc = s->srv;
+ return 1;
+ }
+
+ /* we need to wait a bit more if there was no activity either */
+ if (!(req->flags & BF_WRITE_ACTIVITY))
+ return 1;
+
+ /* OK, this means that a connection succeeded. The caller will be
+ * responsible for handling the transition from CON to EST.
+ */
+ s->logs.t_connect = tv_ms_elapsed(&s->logs.tv_accept, &now);
+ si->state = SI_ST_EST;
+ si->err_type = SI_ET_NONE;
+ si->err_loc = NULL;
+ return 1;
+}
+
+/* This function is called with (si->state == SI_ST_CER) meaning that a
+ * previous connection attempt has failed and that the file descriptor
+ * has already been released. Possible causes include asynchronous error
+ * notification and time out. Possible output states are SI_ST_CLO when
+ * retries are exhausted, SI_ST_TAR when a delay is wanted before a new
+ * connection attempt, SI_ST_ASS when it's wise to retry on the same server,
+ * and SI_ST_REQ when an immediate redispatch is wanted. The buffers are
+ * marked as in error state. It returns 0.
+ */
+int sess_update_st_cer(struct session *s, struct stream_interface *si)
+{
+ /* we probably have to release last session from the server */
+ if (s->srv) {
+ if (s->flags & SN_CURR_SESS) {
+ s->flags &= ~SN_CURR_SESS;
+ s->srv->cur_sess--;
+ }
+ sess_change_server(s, NULL);
+ }
+
+ /* ensure that we have enough retries left */
+ s->conn_retries--;
+ if (s->conn_retries < 0) {
+ if (!si->err_type) {
+ si->err_type = SI_ET_CONN_ERR;
+ si->err_loc = s->srv;
+ }
+
+ if (s->srv)
+ s->srv->failed_conns++;
+ s->be->failed_conns++;
+ if (may_dequeue_tasks(s->srv, s->be))
+ process_srv_queue(s->srv);
+
+ /* shutw is enough so stop a connecting socket */
+ si->shutw(si);
+ si->ob->flags |= BF_WRITE_ERROR;
+ si->ib->flags |= BF_READ_ERROR;
+
+ si->state = SI_ST_CLO;
+ return_srv_error(s, si->err_type);
+ return 0;
+ }
+
+ /* If the "redispatch" option is set on the backend, we are allowed to
+ * retry on another server for the last retry. In order to achieve this,
+ * we must mark the session unassigned, and eventually clear the DIRECT
+ * bit to ignore any persistence cookie. We won't count a retry nor a
+ * redispatch yet, because this will depend on what server is selected.
+ */
+ if (s->srv && s->conn_retries == 0 && s->be->options & PR_O_REDISP) {
+ if (may_dequeue_tasks(s->srv, s->be))
+ process_srv_queue(s->srv);
+
+ s->flags &= ~(SN_DIRECT | SN_ASSIGNED | SN_ADDR_SET);
+ s->prev_srv = s->srv;
+ si->state = SI_ST_REQ;
+ } else {
+ if (s->srv)
+ s->srv->retries++;
+ s->be->retries++;
+ si->state = SI_ST_ASS;
+ }
+
+ if (si->flags & SI_FL_ERR) {
+ /* The error was an asynchronous connection error, and we will
+ * likely have to retry connecting to the same server, most
+ * likely leading to the same result. To avoid this, we wait
+ * one second before retrying.
+ */
+
+ if (!si->err_type)
+ si->err_type = SI_ET_CONN_ERR;
+
+ si->state = SI_ST_TAR;
+ si->exp = tick_add(now_ms, MS_TO_TICKS(1000));
+ return 0;
+ }
+ return 0;
+}
+
+/*
+ * This function handles the transition between the SI_ST_CON state and the
+ * SI_ST_EST state. It must only be called after switching from SI_ST_CON to
+ * SI_ST_EST.
+ */
+void sess_establish(struct session *s, struct stream_interface *si)
+{
+ struct buffer *req = si->ob;
+ struct buffer *rep = si->ib;
+
+ if (req->flags & BF_EMPTY) {
+ EV_FD_CLR(si->fd, DIR_WR);
+ req->wex = TICK_ETERNITY;
+ } else {
+ EV_FD_SET(si->fd, DIR_WR);
+ req->wex = tick_add_ifset(now_ms, s->be->timeout.server);
+ if (tick_isset(req->wex)) {
+ /* FIXME: to prevent the server from expiring read
+ * timeouts during writes, we refresh it. */
+ rep->rex = req->wex;
+ }
+ }
+
+ if (s->be->mode == PR_MODE_TCP) { /* let's allow immediate data connection in this case */
+ if (!(rep->flags & BF_HIJACK)) {
+ EV_FD_SET(si->fd, DIR_RD);
+ rep->rex = tick_add_ifset(now_ms, s->be->timeout.server);
+ }
+ buffer_set_rlim(rep, BUFSIZE); /* no rewrite needed */
+
+ /* if the user wants to log as soon as possible, without counting
+ * bytes from the server, then this is the right moment. */
+ if (s->fe->to_log && !(s->logs.logwait & LW_BYTES)) {
+ s->logs.t_close = s->logs.t_connect; /* to get a valid end date */
+ tcp_sess_log(s);
+ }
+#ifdef CONFIG_HAP_TCPSPLICE
+ if ((s->fe->options & s->be->options) & PR_O_TCPSPLICE) {
+ /* TCP splicing supported by both FE and BE */
+ tcp_splice_splicefd(req->prod->fd, si->fd, 0);
+ }
+#endif
+ }
+ else {
+ rep->analysers |= AN_RTR_HTTP_HDR;
+ buffer_set_rlim(rep, BUFSIZE - MAXREWRITE); /* rewrite needed */
+ s->txn.rsp.msg_state = HTTP_MSG_RPBEFORE;
+ /* reset hdr_idx which was already initialized by the request.
+ * right now, the http parser does it.
+ * hdr_idx_init(&s->txn.hdr_idx);
+ */
+ }
+
+ rep->flags |= BF_READ_ATTACHED; /* producer is now attached */
+ req->wex = TICK_ETERNITY;
+}
+
+/* Update stream interface status for input states SI_ST_ASS, SI_ST_QUE, SI_ST_TAR.
+ * Other input states are simply ignored.
+ * Possible output states are SI_ST_CLO, SI_ST_TAR, SI_ST_ASS, SI_ST_REQ, SI_ST_CON.
+ * Flags must have previously been updated for timeouts and other conditions.
+ */
+void sess_update_stream_int(struct session *s, struct stream_interface *si)
+{
+ DPRINTF(stderr,"[%u] %s: sess=%p rq=%p, rp=%p, exp(r,w)=%u,%u rqf=%08x rpf=%08x rql=%d rpl=%d cs=%d ss=%d\n",
+ now_ms, __FUNCTION__,
+ s,
+ s->req, s->rep,
+ s->req->rex, s->rep->wex,
+ s->req->flags, s->rep->flags,
+ s->req->l, s->rep->l, s->rep->cons->state, s->req->cons->state);
+
+ if (si->state == SI_ST_ASS) {
+ /* Server assigned to connection request, we have to try to connect now */
+ int conn_err;
+
+ conn_err = connect_server(s);
+ if (conn_err == SN_ERR_NONE) {
+ /* state = SI_ST_CON now */
+ return;
+ }
+
+ /* We have received a synchronous error. We might have to
+ * abort, retry immediately or redispatch.
+ */
+ if (conn_err == SN_ERR_INTERNAL) {
+ if (!si->err_type) {
+ si->err_type = SI_ET_CONN_OTHER;
+ si->err_loc = s->srv;
+ }
+
+ if (s->srv)
+ s->srv->cum_sess++;
+ if (s->srv)
+ s->srv->failed_conns++;
+ s->be->failed_conns++;
+
+ /* release other sessions waiting for this server */
+ if (may_dequeue_tasks(s->srv, s->be))
+ process_srv_queue(s->srv);
+
+ /* Failed and not retryable. */
+ si->shutr(si);
+ si->shutw(si);
+ si->ob->flags |= BF_WRITE_ERROR;
+
+ s->logs.t_queue = tv_ms_elapsed(&s->logs.tv_accept, &now);
+
+ /* no session was ever accounted for this server */
+ si->state = SI_ST_CLO;
+ return_srv_error(s, si->err_type);
+ return;
+ }
+
+ /* We are facing a retryable error, but we don't want to run a
+ * turn-around now, as the problem is likely a source port
+ * allocation problem, so we want to retry now.
+ */
+ si->state = SI_ST_CER;
+ si->flags &= ~SI_FL_ERR;
+ sess_update_st_cer(s, si);
+ /* now si->state is one of SI_ST_CLO, SI_ST_TAR, SI_ST_ASS, SI_ST_REQ */
+ return;
+ }
+ else if (si->state == SI_ST_QUE) {
+ /* connection request was queued, check for any update */
+ if (!s->pend_pos) {
+ /* The connection is not in the queue anymore. Either
+ * we have a server connection slot available and we
+ * go directly to the assigned state, or we need to
+ * load-balance first and go to the INI state.
+ */
+ si->exp = TICK_ETERNITY;
+ if (unlikely(!(s->flags & SN_ASSIGNED)))
+ si->state = SI_ST_REQ;
+ else {
+ s->logs.t_queue = tv_ms_elapsed(&s->logs.tv_accept, &now);
+ si->state = SI_ST_ASS;
+ }
+ return;
+ }
+
+ /* Connection request still in queue... */
+ if (si->flags & SI_FL_EXP) {
+ /* ... and timeout expired */
+ si->exp = TICK_ETERNITY;
+ s->logs.t_queue = tv_ms_elapsed(&s->logs.tv_accept, &now);
+ if (s->srv)
+ s->srv->failed_conns++;
+ s->be->failed_conns++;
+ si->shutr(si);
+ si->shutw(si);
+ si->ob->flags |= BF_WRITE_TIMEOUT;
+ if (!si->err_type)
+ si->err_type = SI_ET_QUEUE_TO;
+ si->state = SI_ST_CLO;
+ return_srv_error(s, si->err_type);
+ return;
+ }
+
+ /* Connection remains in queue, check if we have to abort it */
+ if ((si->ob->flags & (BF_READ_ERROR|BF_SHUTW_NOW)) || /* abort requested */
+ ((si->ob->flags & BF_SHUTR) && /* empty and client stopped */
+ (si->ob->flags & BF_EMPTY || s->be->options & PR_O_ABRT_CLOSE))) {
+ /* give up */
+ si->exp = TICK_ETERNITY;
+ s->logs.t_queue = tv_ms_elapsed(&s->logs.tv_accept, &now);
+ si->shutr(si);
+ si->shutw(si);
+ si->err_type |= SI_ET_QUEUE_ABRT;
+ si->state = SI_ST_CLO;
+ return_srv_error(s, si->err_type);
+ return;
+ }
+
+ /* Nothing changed */
+ return;
+ }
+ else if (si->state == SI_ST_TAR) {
+ /* Connection request might be aborted */
+ if ((si->ob->flags & (BF_READ_ERROR|BF_SHUTW_NOW)) || /* abort requested */
+ ((si->ob->flags & BF_SHUTR) && /* empty and client stopped */
+ (si->ob->flags & BF_EMPTY || s->be->options & PR_O_ABRT_CLOSE))) {
+ /* give up */
+ si->exp = TICK_ETERNITY;
+ si->shutr(si);
+ si->shutw(si);
+ si->err_type |= SI_ET_CONN_ABRT;
+ si->state = SI_ST_CLO;
+ return_srv_error(s, si->err_type);
+ return;
+ }
+
+ if (!(si->flags & SI_FL_EXP))
+ return; /* still in turn-around */
+
+ si->exp = TICK_ETERNITY;
+
+ /* we keep trying on the same server as long as the session is
+ * marked "assigned".
+ * FIXME: Should we force a redispatch attempt when the server is down ?
+ */
+ if (s->flags & SN_ASSIGNED)
+ si->state = SI_ST_ASS;
+ else
+ si->state = SI_ST_REQ;
+ return;
+ }
+}
+
+/* This function initiates a server connection request on a stream interface
+ * already in SI_ST_REQ state. Upon success, the state goes to SI_ST_ASS,
+ * indicating that a server has been assigned. It may also return SI_ST_QUE,
+ * or SI_ST_CLO upon error.
+ */
+static void sess_prepare_conn_req(struct session *s, struct stream_interface *si) {
+ DPRINTF(stderr,"[%u] %s: sess=%p rq=%p, rp=%p, exp(r,w)=%u,%u rqf=%08x rpf=%08x rql=%d rpl=%d cs=%d ss=%d\n",
+ now_ms, __FUNCTION__,
+ s,
+ s->req, s->rep,
+ s->req->rex, s->rep->wex,
+ s->req->flags, s->rep->flags,
+ s->req->l, s->rep->l, s->rep->cons->state, s->req->cons->state);
+
+ if (si->state != SI_ST_REQ)
+ return;
+
+ /* Try to assign a server */
+ if (srv_redispatch_connect(s) != 0) {
+ /* We did not get a server. Either we queued the
+ * connection request, or we encountered an error.
+ */
+ if (si->state == SI_ST_QUE)
+ return;
+
+ /* we did not get any server, let's check the cause */
+ si->shutr(si);
+ si->shutw(si);
+ si->ob->flags |= BF_WRITE_ERROR;
+ if (!si->err_type)
+ si->err_type = SI_ET_CONN_OTHER;
+ si->state = SI_ST_CLO;
+ return_srv_error(s, si->err_type);
+ return;
+ }
+
+ /* The server is assigned */
+ s->logs.t_queue = tv_ms_elapsed(&s->logs.tv_accept, &now);
+ si->state = SI_ST_ASS;
+}
+
+/* Processes the client, server, request and response jobs of a session task,
+ * then puts it back to the wait queue in a clean state, or cleans up its
+ * resources if it must be deleted. Returns in <next> the date the task wants
+ * to be woken up, or TICK_ETERNITY. In order not to call all functions for
+ * nothing too many times, the request and response buffers flags are monitored
+ * and each function is called only if at least another function has changed at
+ * least one flag it is interested in.
+ */
+void process_session(struct task *t, int *next)
+{
+ struct session *s = t->context;
+ int resync;
+ unsigned int rqf_last, rpf_last;
+
+ //DPRINTF(stderr, "%s:%d: cs=%d ss=%d(%d) rqf=0x%08x rpf=0x%08x\n", __FUNCTION__, __LINE__,
+ // s->si[0].state, s->si[1].state, s->si[1].err_type, s->req->flags, s->rep->flags);
+
+ /* 1a: Check for low level timeouts if needed. We just set a flag on
+ * stream interfaces when their timeouts have expired.
+ */
+ if (unlikely(t->state & TASK_WOKEN_TIMER)) {
+ stream_int_check_timeouts(&s->si[0]);
+ stream_int_check_timeouts(&s->si[1]);
+ buffer_check_timeouts(s->req);
+ buffer_check_timeouts(s->rep);
+ }
+
+ /* copy req/rep flags so that we can detect shutdowns */
+ rqf_last = s->req->flags;
+ rpf_last = s->rep->flags;
+
+ /* 1b: check for low-level errors reported at the stream interface.
+ * First we check if it's a retryable error (in which case we don't
+ * want to tell the buffer). Otherwise we report the error one level
+ * upper by setting flags into the buffers. Note that the side towards
+ * the client cannot have connect (hence retryable) errors. Also, the
+ * connection setup code must be able to deal with any type of abort.
+ */
+ if (unlikely(s->si[0].flags & SI_FL_ERR)) {
+ if (s->si[0].state == SI_ST_EST || s->si[0].state == SI_ST_DIS) {
+ s->si[0].shutr(&s->si[0]);
+ s->si[0].shutw(&s->si[0]);
+ stream_int_report_error(&s->si[0]);
+ }
+ }
+
+ if (unlikely(s->si[1].flags & SI_FL_ERR)) {
+ if (s->si[1].state == SI_ST_EST || s->si[1].state == SI_ST_DIS) {
+ s->si[1].shutr(&s->si[1]);
+ s->si[1].shutw(&s->si[1]);
+ stream_int_report_error(&s->si[1]);
+ s->be->failed_resp++;
+ if (s->srv)
+ s->srv->failed_resp++;
+ }
+ /* note: maybe we should process connection errors here ? */
+ }
+
+ if (s->si[1].state == SI_ST_CON) {
+ /* we were trying to establish a connection on the server side,
+ * maybe it succeeded, maybe it failed, maybe we timed out, ...
+ */
+ if (unlikely(!sess_update_st_con_tcp(s, &s->si[1])))
+ sess_update_st_cer(s, &s->si[1]);
+ else if (s->si[1].state == SI_ST_EST)
+ sess_establish(s, &s->si[1]);
+
+ /* state is now one of SI_ST_CON (still in progress), SI_ST_EST
+ * (established), SI_ST_DIS (abort), SI_ST_CLO (last error),
+ * SI_ST_ASS/SI_ST_TAR/SI_ST_REQ for retryable errors.
+ */
+ }
+
+ /* check buffer timeouts, and close the corresponding stream interfaces
+ * for future reads or writes. Note: this will also concern upper layers
+ * but we do not touch any other flag. We must be careful and correctly
+ * detect state changes when calling them.
+ */
+ if (unlikely(s->req->flags & (BF_READ_TIMEOUT|BF_WRITE_TIMEOUT))) {
+ if (s->req->flags & BF_READ_TIMEOUT)
+ s->req->prod->shutr(s->req->prod);
+ if (s->req->flags & BF_WRITE_TIMEOUT)
+ s->req->cons->shutw(s->req->cons);
+ DPRINTF(stderr,
+ "[%u] %s:%d: task=%p s=%p, sfl=0x%08x, rq=%p, rp=%p, exp(r,w)=%u,%u rqf=%08x rpf=%08x rql=%d rpl=%d cs=%d ss=%d, cet=0x%x set=0x%x retr=%d\n",
+ now_ms, __FUNCTION__, __LINE__,
+ t,
+ s, s->flags,
+ s->req, s->rep,
+ s->req->rex, s->rep->wex,
+ s->req->flags, s->rep->flags,
+ s->req->l, s->rep->l, s->rep->cons->state, s->req->cons->state,
+ s->rep->cons->err_type, s->req->cons->err_type,
+ s->conn_retries);
+ }
+
+ if (unlikely(s->rep->flags & (BF_READ_TIMEOUT|BF_WRITE_TIMEOUT))) {
+ if (s->rep->flags & BF_READ_TIMEOUT)
+ s->rep->prod->shutr(s->rep->prod);
+ if (s->rep->flags & BF_WRITE_TIMEOUT)
+ s->rep->cons->shutw(s->rep->cons);
+ DPRINTF(stderr,
+ "[%u] %s:%d: task=%p s=%p, sfl=0x%08x, rq=%p, rp=%p, exp(r,w)=%u,%u rqf=%08x rpf=%08x rql=%d rpl=%d cs=%d ss=%d, cet=0x%x set=0x%x retr=%d\n",
+ now_ms, __FUNCTION__, __LINE__,
+ t,
+ s, s->flags,
+ s->req, s->rep,
+ s->req->rex, s->rep->wex,
+ s->req->flags, s->rep->flags,
+ s->req->l, s->rep->l, s->rep->cons->state, s->req->cons->state,
+ s->rep->cons->err_type, s->req->cons->err_type,
+ s->conn_retries);
+ }
+
+ /* Check for connection closure */
+
+resync_stream_interface:
+ DPRINTF(stderr,
+ "[%u] %s:%d: task=%p s=%p, sfl=0x%08x, rq=%p, rp=%p, exp(r,w)=%u,%u rqf=%08x rpf=%08x rql=%d rpl=%d cs=%d ss=%d, cet=0x%x set=0x%x retr=%d\n",
+ now_ms, __FUNCTION__, __LINE__,
+ t,
+ s, s->flags,
+ s->req, s->rep,
+ s->req->rex, s->rep->wex,
+ s->req->flags, s->rep->flags,
+ s->req->l, s->rep->l, s->rep->cons->state, s->req->cons->state,
+ s->rep->cons->err_type, s->req->cons->err_type,
+ s->conn_retries);
+
+ /* nothing special to be done on client side */
+ if (unlikely(s->req->prod->state == SI_ST_DIS))
+ s->req->prod->state = SI_ST_CLO;
+
+ /* When a server-side connection is released, we have to count it and
+ * check for pending connections on this server.
+ */
+ if (unlikely(s->req->cons->state == SI_ST_DIS)) {
+ s->req->cons->state = SI_ST_CLO;
+ if (s->srv) {
+ if (s->flags & SN_CURR_SESS) {
+ s->flags &= ~SN_CURR_SESS;
+ s->srv->cur_sess--;
+ }
+ sess_change_server(s, NULL);
+ if (may_dequeue_tasks(s->srv, s->be))
+ process_srv_queue(s->srv);
+ }
+ }
+
+ /*
+ * Note: of the transient states (REQ, CER, DIS), only REQ may remain
+ * at this point.
+ */
+
+ /**** Process layer 7 below ****/
+
+ resync = 0;
+
+ /* Analyse request */
+ if ((s->req->flags & BF_MASK_ANALYSER) ||
+ (s->req->flags ^ rqf_last) & BF_MASK_STATIC) {
+ unsigned int flags = s->req->flags;
+
+ if (s->req->prod->state >= SI_ST_EST) {
+ /* it's up to the analysers to reset write_ena */
+ buffer_write_ena(s->req);
+ if (s->req->analysers)
+ process_request(s);
+ }
+ s->req->flags &= BF_CLEAR_READ & BF_CLEAR_WRITE & BF_CLEAR_TIMEOUT;
+ flags &= BF_CLEAR_READ & BF_CLEAR_WRITE & BF_CLEAR_TIMEOUT;
+ if (s->req->flags != flags)
+ resync = 1;
+ }
+
+ /* reflect what the L7 analysers have seen last */
+ rqf_last = s->req->flags;
+
+ /*
+ * Now forward all shutdown requests between both sides of the buffer
+ */
+
+ /* first, let's check if the request buffer needs to shutdown(write) */
+ if (unlikely((s->req->flags & (BF_SHUTW|BF_SHUTW_NOW|BF_EMPTY|BF_HIJACK|BF_WRITE_ENA|BF_SHUTR)) ==
+ (BF_EMPTY|BF_WRITE_ENA|BF_SHUTR)))
+ buffer_shutw_now(s->req);
+ else if ((s->req->flags & (BF_SHUTW|BF_SHUTW_NOW|BF_EMPTY|BF_WRITE_ENA)) == (BF_EMPTY|BF_WRITE_ENA) &&
+ (s->req->cons->state == SI_ST_EST) &&
+ s->be->options & PR_O_FORCE_CLO &&
+ s->rep->flags & BF_READ_ACTIVITY) {
+ /* We want to force the connection to the server to close,
+ * and the server has begun to respond. That's the right
+ * time.
+ */
+ buffer_shutw_now(s->req);
+ }
+
+ /* shutdown(write) pending */
+ if (unlikely((s->req->flags & (BF_SHUTW|BF_SHUTW_NOW)) == BF_SHUTW_NOW))
+ s->req->cons->shutw(s->req->cons);
+
+ /* shutdown(write) done on server side, we must stop the client too */
+ if (unlikely((s->req->flags & (BF_SHUTW|BF_SHUTR|BF_SHUTR_NOW)) == BF_SHUTW))
+ buffer_shutr_now(s->req);
+
+ /* shutdown(read) pending */
+ if (unlikely((s->req->flags & (BF_SHUTR|BF_SHUTR_NOW)) == BF_SHUTR_NOW))
+ s->req->prod->shutr(s->req->prod);
+
+ /* it's possible that an upper layer has requested a connection setup */
+ if (s->req->cons->state == SI_ST_INI &&
+ (s->req->flags & (BF_WRITE_ENA|BF_SHUTW|BF_SHUTW_NOW)) == BF_WRITE_ENA)
+ s->req->cons->state = SI_ST_REQ;
+
+ /* we may have a pending connection request, or a connection waiting
+ * for completion.
+ */
+ if (s->si[1].state >= SI_ST_REQ && s->si[1].state < SI_ST_CON) {
+ do {
+ /* nb: step 1 might switch from QUE to ASS, but we first want
+ * to give a chance to step 2 to perform a redirect if needed.
+ */
+ if (s->si[1].state != SI_ST_REQ)
+ sess_update_stream_int(s, &s->si[1]);
+ if (s->si[1].state == SI_ST_REQ)
+ sess_prepare_conn_req(s, &s->si[1]);
+
+ if (s->si[1].state == SI_ST_ASS && s->srv &&
+ s->srv->rdr_len && (s->flags & SN_REDIRECTABLE))
+ perform_http_redirect(s, &s->si[1]);
+ } while (s->si[1].state == SI_ST_ASS);
+ }
+
+ /*
+ * Here we want to check if we need to resync or not.
+ */
+ if ((s->req->flags ^ rqf_last) & BF_MASK_STATIC)
+ resync = 1;
+
+ s->req->flags &= BF_CLEAR_READ & BF_CLEAR_WRITE & BF_CLEAR_TIMEOUT;
+
+ /* according to benchmarks, it makes sense to resync now */
+ if (resync)
+ goto resync_stream_interface;
+
+
+ /* Analyse response */
+
+ if (unlikely(s->rep->flags & BF_HIJACK)) {
+ /* In inject mode, we wake up everytime something has
+ * happened on the write side of the buffer.
+ */
+ unsigned int flags = s->rep->flags;
+
+ if ((s->rep->flags & (BF_WRITE_PARTIAL|BF_WRITE_ERROR|BF_SHUTW)) &&
+ !(s->rep->flags & BF_FULL)) {
+ produce_content(s);
+ }
+ s->rep->flags &= BF_CLEAR_READ & BF_CLEAR_WRITE & BF_CLEAR_TIMEOUT;
+ flags &= BF_CLEAR_READ & BF_CLEAR_WRITE & BF_CLEAR_TIMEOUT;
+ if (s->rep->flags != flags)
+ resync = 1;
+ }
+ else if ((s->rep->flags & BF_MASK_ANALYSER) ||
+ (s->rep->flags ^ rpf_last) & BF_MASK_STATIC) {
+ unsigned int flags = s->rep->flags;
+
+ if (s->rep->prod->state >= SI_ST_EST) {
+ /* it's up to the analysers to reset write_ena */
+ buffer_write_ena(s->rep);
+ if (s->rep->analysers)
+ process_response(s);
+ }
+ s->rep->flags &= BF_CLEAR_READ & BF_CLEAR_WRITE & BF_CLEAR_TIMEOUT;
+ flags &= BF_CLEAR_READ & BF_CLEAR_WRITE & BF_CLEAR_TIMEOUT;
+ if (s->rep->flags != flags)
+ resync = 1;
+ }
+
+ /* reflect what the L7 analysers have seen last */
+ rpf_last = s->rep->flags;
+
+ /*
+ * Now forward all shutdown requests between both sides of the buffer
+ */
+
+ /*
+ * FIXME: this is probably where we should produce error responses.
+ */
+
+ /* first, let's check if the request buffer needs to shutdown(write) */
+ if (unlikely((s->rep->flags & (BF_SHUTW|BF_SHUTW_NOW|BF_EMPTY|BF_HIJACK|BF_WRITE_ENA|BF_SHUTR)) ==
+ (BF_EMPTY|BF_WRITE_ENA|BF_SHUTR)))
+ buffer_shutw_now(s->rep);
+
+ /* shutdown(write) pending */
+ if (unlikely((s->rep->flags & (BF_SHUTW|BF_SHUTW_NOW)) == BF_SHUTW_NOW))
+ s->rep->cons->shutw(s->rep->cons);
+
+ /* shutdown(write) done on the client side, we must stop the server too */
+ if (unlikely((s->rep->flags & (BF_SHUTW|BF_SHUTR|BF_SHUTR_NOW)) == BF_SHUTW))
+ buffer_shutr_now(s->rep);
+
+ /* shutdown(read) pending */
+ if (unlikely((s->rep->flags & (BF_SHUTR|BF_SHUTR_NOW)) == BF_SHUTR_NOW))
+ s->rep->prod->shutr(s->rep->prod);
+
+ /*
+ * Here we want to check if we need to resync or not.
+ */
+ if ((s->rep->flags ^ rpf_last) & BF_MASK_STATIC)
+ resync = 1;
+
+ s->rep->flags &= BF_CLEAR_READ & BF_CLEAR_WRITE & BF_CLEAR_TIMEOUT;
+
+ if (resync)
+ goto resync_stream_interface;
+
+
+ /* This is needed only when debugging is enabled, to indicate
+ * client-side or server-side close. Please note that in the unlikely
+ * event where both sides would close at once, the sequence is reported
+ * on the server side first.
+ */
+ if (unlikely((global.mode & MODE_DEBUG) &&
+ (!(global.mode & MODE_QUIET) ||
+ (global.mode & MODE_VERBOSE)))) {
+ int len;
+
+ if (s->si[1].state == SI_ST_CLO &&
+ s->si[1].prev_state == SI_ST_EST) {
+ len = sprintf(trash, "%08x:%s.srvcls[%04x:%04x]\n",
+ s->uniq_id, s->be->id,
+ (unsigned short)s->si[0].fd,
+ (unsigned short)s->si[1].fd);
+ write(1, trash, len);
+ }
+
+ if (s->si[0].state == SI_ST_CLO &&
+ s->si[0].prev_state == SI_ST_EST) {
+ len = sprintf(trash, "%08x:%s.clicls[%04x:%04x]\n",
+ s->uniq_id, s->be->id,
+ (unsigned short)s->si[0].fd,
+ (unsigned short)s->si[1].fd);
+ write(1, trash, len);
+ }
+ }
+
+ if (likely((s->rep->cons->state != SI_ST_CLO) ||
+ (s->req->cons->state > SI_ST_INI && s->req->cons->state < SI_ST_CLO))) {
+
+ if ((s->fe->options & PR_O_CONTSTATS) && (s->flags & SN_BE_ASSIGNED))
+ session_process_counters(s);
+
+ if (s->rep->cons->state == SI_ST_EST)
+ stream_sock_data_finish(s->rep->cons->fd);
+
+ if (s->req->cons->state == SI_ST_EST)
+ stream_sock_data_finish(s->req->cons->fd);
+
+ s->req->flags &= BF_CLEAR_READ & BF_CLEAR_WRITE & BF_CLEAR_TIMEOUT;
+ s->rep->flags &= BF_CLEAR_READ & BF_CLEAR_WRITE & BF_CLEAR_TIMEOUT;
+ s->si[0].prev_state = s->si[0].state;
+ s->si[1].prev_state = s->si[1].state;
+ s->si[0].flags = s->si[1].flags = SI_FL_NONE;
+
+ /* Trick: if a request is being waiting for the server to respond,
+ * and if we know the server can timeout, we don't want the timeout
+ * to expire on the client side first, but we're still interested
+ * in passing data from the client to the server (eg: POST). Thus,
+ * we can cancel the client's request timeout if the server's
+ * request timeout is set and the server has not yet sent a response.
+ */
+
+ if ((s->rep->flags & (BF_WRITE_ENA|BF_SHUTR)) == 0 &&
+ (tick_isset(s->req->wex) || tick_isset(s->rep->rex)))
+ s->req->rex = TICK_ETERNITY;
+
+ t->expire = tick_first(tick_first(s->req->rex, s->req->wex),
+ tick_first(s->rep->rex, s->rep->wex));
+ if (s->req->analysers)
+ t->expire = tick_first(t->expire, s->req->analyse_exp);
+
+ if (s->si[0].exp)
+ t->expire = tick_first(t->expire, s->si[0].exp);
+
+ if (s->si[1].exp)
+ t->expire = tick_first(t->expire, s->si[1].exp);
+
+#ifdef DEBUG_FULL
+ fprintf(stderr, "[%u] queuing with exp=%u req->rex=%u req->wex=%u req->ana_exp=%u rep->rex=%u rep->wex=%u, cs=%d, ss=%d\n",
+ now_ms, t->expire, s->req->rex, s->req->wex, s->req->analyse_exp, s->rep->rex, s->rep->wex, s->si[0].state, s->si[1].state);
+#endif
+ /* restore t to its place in the task list */
+ task_queue(t);
+
+#ifdef DEBUG_DEV
+ /* this may only happen when no timeout is set or in case of an FSM bug */
+ if (!t->expire)
+ ABORT_NOW();
+#endif
+ *next = t->expire;
+ return; /* nothing more to do */
+ }
+
+ s->fe->feconn--;
+ if (s->flags & SN_BE_ASSIGNED)
+ s->be->beconn--;
+ actconn--;
+
+ if (unlikely((global.mode & MODE_DEBUG) &&
+ (!(global.mode & MODE_QUIET) || (global.mode & MODE_VERBOSE)))) {
+ int len;
+ len = sprintf(trash, "%08x:%s.closed[%04x:%04x] (term_trace=0x%08x)\n",
+ s->uniq_id, s->be->id,
+ (unsigned short)s->req->prod->fd, (unsigned short)s->req->cons->fd,
+ s->term_trace);
+ write(1, trash, len);
+ }
+
+ s->logs.t_close = tv_ms_elapsed(&s->logs.tv_accept, &now);
+ session_process_counters(s);
+
+ /* let's do a final log if we need it */
+ if (s->logs.logwait &&
+ !(s->flags & SN_MONITOR) &&
+ (!(s->fe->options & PR_O_NULLNOLOG) || s->req->total)) {
+ if (s->fe->to_log & LW_REQ)
+ http_sess_log(s);
+ else
+ tcp_sess_log(s);
+ }
+
+ /* the task MUST not be in the run queue anymore */
+ task_delete(t);
+ session_free(s);
+ task_free(t);
+ *next = TICK_ETERNITY;
+}
+
/*
* This function adjusts sess->srv_conn and maintains the previous and new
* server's served session counts. Setting newsrv to NULL is enough to release
projects / thirdparty / haproxy.git / commitdiff
