[H2_FT_CONTINUATION ] = { .dir = 3, .min_id = 1, .max_id = H2_MAX_STREAM_ID, .min_len = 0, .max_len = H2_MAX_FRAME_LEN, },
};
-/* Prepare the request line into <*ptr> (stopping at <end>) from pseudo headers
- * stored in <phdr[]>. <fields> indicates what was found so far. This should be
- * called once at the detection of the first general header field or at the end
- * of the request if no general header field was found yet. Returns 0 on success
- * or a negative error code on failure. Upon success, <msgf> is updated with a
- * few H2_MSGF_* flags indicating what was found while parsing.
- */
-static int h2_prepare_h1_reqline(uint32_t fields, struct ist *phdr, char **ptr, char *end, unsigned int *msgf)
-{
- char *out = *ptr;
- int uri_idx = H2_PHDR_IDX_PATH;
-
- if ((fields & H2_PHDR_FND_METH) && isteq(phdr[H2_PHDR_IDX_METH], ist("CONNECT"))) {
- /* RFC 7540 #8.2.6 regarding CONNECT: ":scheme" and ":path"
- * MUST be omitted ; ":authority" contains the host and port
- * to connect to.
- */
- if (fields & H2_PHDR_FND_SCHM) {
- /* scheme not allowed */
- goto fail;
- }
- else if (fields & H2_PHDR_FND_PATH) {
- /* path not allowed */
- goto fail;
- }
- else if (!(fields & H2_PHDR_FND_AUTH)) {
- /* missing authority */
- goto fail;
- }
- // otherwise OK ; let's use the authority instead of the URI
- uri_idx = H2_PHDR_IDX_AUTH;
- *msgf |= H2_MSGF_BODY_TUNNEL;
- }
- else if ((fields & (H2_PHDR_FND_METH|H2_PHDR_FND_SCHM|H2_PHDR_FND_PATH)) !=
- (H2_PHDR_FND_METH|H2_PHDR_FND_SCHM|H2_PHDR_FND_PATH)) {
- /* RFC 7540 #8.1.2.3 : all requests MUST include exactly one
- * valid value for the ":method", ":scheme" and ":path" phdr
- * unless it is a CONNECT request.
- */
- if (!(fields & H2_PHDR_FND_METH)) {
- /* missing method */
- goto fail;
- }
- else if (!(fields & H2_PHDR_FND_SCHM)) {
- /* missing scheme */
- goto fail;
- }
- else {
- /* missing path */
- goto fail;
- }
- }
-
- /* 7540#8.1.2.3: :path must not be empty */
- if (!phdr[uri_idx].len)
- goto fail;
-
- if (out + phdr[H2_PHDR_IDX_METH].len + 1 + phdr[uri_idx].len + 11 > end) {
- /* too large */
- goto fail;
- }
-
- memcpy(out, phdr[H2_PHDR_IDX_METH].ptr, phdr[H2_PHDR_IDX_METH].len);
- out += phdr[H2_PHDR_IDX_METH].len;
- *(out++) = ' ';
-
- memcpy(out, phdr[uri_idx].ptr, phdr[uri_idx].len);
- out += phdr[uri_idx].len;
- memcpy(out, " HTTP/1.1\r\n", 11);
- out += 11;
-
- *ptr = out;
- return 0;
- fail:
- return -1;
-}
-
-/* Takes an H2 request present in the headers list <list> terminated by a name
- * being <NULL,0> and emits the equivalent HTTP/1.1 request according to the
- * rules documented in RFC7540 #8.1.2. The output contents are emitted in <out>
- * for a max of <osize> bytes, and the amount of bytes emitted is returned. In
- * case of error, a negative error code is returned.
- *
- * Upon success, <msgf> is filled with a few H2_MSGF_* flags indicating what
- * was found while parsing. The caller must set it to zero in or H2_MSGF_BODY
- * if a body is detected (!ES).
- *
- * The headers list <list> must be composed of :
- * - n.name != NULL, n.len > 0 : literal header name
- * - n.name == NULL, n.len > 0 : indexed pseudo header name number <n.len>
- * among H2_PHDR_IDX_*
- * - n.name ignored, n.len == 0 : end of list
- * - in all cases except the end of list, v.name and v.len must designate a
- * valid value.
- *
- * The Cookie header will be reassembled at the end, and for this, the <list>
- * will be used to create a linked list, so its contents may be destroyed.
- */
-int h2_make_h1_request(struct http_hdr *list, char *out, int osize, unsigned int *msgf, unsigned long long *body_len)
-{
- struct ist phdr_val[H2_PHDR_NUM_ENTRIES];
- char *out_end = out + osize;
- uint32_t fields; /* bit mask of H2_PHDR_FND_* */
- uint32_t idx;
- int ck, lck; /* cookie index and last cookie index */
- int phdr;
- int ret;
- int i;
-
- lck = ck = -1; // no cookie for now
- fields = 0;
- for (idx = 0; list[idx].n.len != 0; idx++) {
- if (!list[idx].n.ptr) {
- /* this is an indexed pseudo-header */
- phdr = list[idx].n.len;
- }
- else {
- /* this can be any type of header */
- /* RFC7540#8.1.2: upper case not allowed in header field names */
- for (i = 0; i < list[idx].n.len; i++)
- if ((uint8_t)(list[idx].n.ptr[i] - 'A') < 'Z' - 'A')
- goto fail;
-
- phdr = h2_str_to_phdr(list[idx].n);
- }
-
- if (phdr > 0 && phdr < H2_PHDR_NUM_ENTRIES) {
- /* insert a pseudo header by its index (in phdr) and value (in value) */
- if (fields & ((1 << phdr) | H2_PHDR_FND_NONE)) {
- if (fields & H2_PHDR_FND_NONE) {
- /* pseudo header field after regular headers */
- goto fail;
- }
- else {
- /* repeated pseudo header field */
- goto fail;
- }
- }
- fields |= 1 << phdr;
- phdr_val[phdr] = list[idx].v;
- continue;
- }
- else if (phdr != 0) {
- /* invalid pseudo header -- should never happen here */
- goto fail;
- }
-
- /* regular header field in (name,value) */
- if (!(fields & H2_PHDR_FND_NONE)) {
- /* no more pseudo-headers, time to build the request line */
- ret = h2_prepare_h1_reqline(fields, phdr_val, &out, out_end, msgf);
- if (ret != 0)
- goto leave;
- fields |= H2_PHDR_FND_NONE;
- }
-
- if (isteq(list[idx].n, ist("host")))
- fields |= H2_PHDR_FND_HOST;
-
- if (isteq(list[idx].n, ist("content-length"))) {
- ret = h2_parse_cont_len_header(msgf, &list[idx].v, body_len);
- if (ret < 0)
- goto fail;
-
- if (ret == 0)
- continue; // skip this duplicate
- }
-
- /* these ones are forbidden in requests (RFC7540#8.1.2.2) */
- if (isteq(list[idx].n, ist("connection")) ||
- isteq(list[idx].n, ist("proxy-connection")) ||
- isteq(list[idx].n, ist("keep-alive")) ||
- isteq(list[idx].n, ist("upgrade")) ||
- isteq(list[idx].n, ist("transfer-encoding")))
- goto fail;
-
- if (isteq(list[idx].n, ist("te")) && !isteq(list[idx].v, ist("trailers")))
- goto fail;
-
- /* cookie requires special processing at the end */
- if (isteq(list[idx].n, ist("cookie"))) {
- list[idx].n.len = -1;
-
- if (ck < 0)
- ck = idx;
- else
- list[lck].n.len = idx;
-
- lck = idx;
- continue;
- }
-
- if (out + list[idx].n.len + 2 + list[idx].v.len + 2 > out_end) {
- /* too large */
- goto fail;
- }
-
- /* copy "name: value" */
- memcpy(out, list[idx].n.ptr, list[idx].n.len);
- out += list[idx].n.len;
- *(out++) = ':';
- *(out++) = ' ';
-
- memcpy(out, list[idx].v.ptr, list[idx].v.len);
- out += list[idx].v.len;
- *(out++) = '\r';
- *(out++) = '\n';
- }
-
- /* RFC7540#8.1.2.1 mandates to reject response pseudo-headers (:status) */
- if (fields & H2_PHDR_FND_STAT)
- goto fail;
-
- /* Let's dump the request now if not yet emitted. */
- if (!(fields & H2_PHDR_FND_NONE)) {
- ret = h2_prepare_h1_reqline(fields, phdr_val, &out, out_end, msgf);
- if (ret != 0)
- goto leave;
- }
-
- /* complete with missing Host if needed */
- if ((fields & (H2_PHDR_FND_HOST|H2_PHDR_FND_AUTH)) == H2_PHDR_FND_AUTH) {
- /* missing Host field, use :authority instead */
- if (out + 6 + phdr_val[H2_PHDR_IDX_AUTH].len + 2 > out_end) {
- /* too large */
- goto fail;
- }
-
- memcpy(out, "host: ", 6);
- memcpy(out + 6, phdr_val[H2_PHDR_IDX_AUTH].ptr, phdr_val[H2_PHDR_IDX_AUTH].len);
- out += 6 + phdr_val[H2_PHDR_IDX_AUTH].len;
- *(out++) = '\r';
- *(out++) = '\n';
- }
-
- if ((*msgf & (H2_MSGF_BODY|H2_MSGF_BODY_TUNNEL|H2_MSGF_BODY_CL)) == H2_MSGF_BODY) {
- /* add chunked encoding */
- if (out + 28 > out_end)
- goto fail;
- memcpy(out, "transfer-encoding: chunked\r\n", 28);
- out += 28;
- }
-
- /* now we may have to build a cookie list. We'll dump the values of all
- * visited headers.
- */
- if (ck >= 0) {
- if (out + 8 > out_end) {
- /* too large */
- goto fail;
- }
- memcpy(out, "cookie: ", 8);
- out += 8;
-
- do {
- if (out + list[ck].v.len + 2 > out_end) {
- /* too large */
- goto fail;
- }
- memcpy(out, list[ck].v.ptr, list[ck].v.len);
- out += list[ck].v.len;
- ck = list[ck].n.len;
-
- if (ck >= 0) {
- *(out++) = ';';
- *(out++) = ' ';
- }
- } while (ck >= 0);
-
- if (out + 2 > out_end) {
- /* too large */
- goto fail;
- }
- *(out++) = '\r';
- *(out++) = '\n';
- }
-
- /* And finish */
- if (out + 2 > out_end) {
- /* too large */
- goto fail;
- }
-
- *(out++) = '\r';
- *(out++) = '\n';
- ret = out + osize - out_end;
- leave:
- return ret;
-
- fail:
- return -1;
-}
-
-/* Takes an H2 headers list <list> terminated by a name being <NULL,0> and
- * emits the equivalent HTTP/1.1 trailers block not including the empty line.
- * The output contents are emitted in <out> for a max of <osize> bytes, and the
- * amount of bytes emitted is returned. In case of error, a negative error code
- * is returned. The caller must have verified that the message in the buffer is
- * compatible with receipt of trailers.
- *
- * The headers list <list> must be composed of :
- * - n.name != NULL, n.len > 0 : literal header name
- * - n.name == NULL, n.len > 0 : indexed pseudo header name number <n.len>
- * among H2_PHDR_IDX_* (illegal here)
- * - n.name ignored, n.len == 0 : end of list
- * - in all cases except the end of list, v.name and v.len must designate a
- * valid value.
- */
-int h2_make_h1_trailers(struct http_hdr *list, char *out, int osize)
-{
- char *out_end = out + osize;
- uint32_t idx;
- int i;
-
- for (idx = 0; list[idx].n.len != 0; idx++) {
- if (!list[idx].n.ptr) {
- /* This is an indexed pseudo-header (RFC7540#8.1.2.1) */
- goto fail;
- }
-
- /* RFC7540#8.1.2: upper case not allowed in header field names */
- for (i = 0; i < list[idx].n.len; i++)
- if ((uint8_t)(list[idx].n.ptr[i] - 'A') < 'Z' - 'A')
- goto fail;
-
- if (h2_str_to_phdr(list[idx].n) != 0) {
- /* This is a pseudo-header (RFC7540#8.1.2.1) */
- goto fail;
- }
-
- /* these ones are forbidden in trailers (RFC7540#8.1.2.2) */
- if (isteq(list[idx].n, ist("host")) ||
- isteq(list[idx].n, ist("content-length")) ||
- isteq(list[idx].n, ist("connection")) ||
- isteq(list[idx].n, ist("proxy-connection")) ||
- isteq(list[idx].n, ist("keep-alive")) ||
- isteq(list[idx].n, ist("upgrade")) ||
- isteq(list[idx].n, ist("te")) ||
- isteq(list[idx].n, ist("transfer-encoding")))
- goto fail;
-
- if (out + list[idx].n.len + 2 + list[idx].v.len + 2 > out_end) {
- /* too large */
- goto fail;
- }
-
- /* copy "name: value" */
- memcpy(out, list[idx].n.ptr, list[idx].n.len);
- out += list[idx].n.len;
- *(out++) = ':';
- *(out++) = ' ';
-
- memcpy(out, list[idx].v.ptr, list[idx].v.len);
- out += list[idx].v.len;
- *(out++) = '\r';
- *(out++) = '\n';
- }
-
- return out + osize - out_end;
-
- fail:
- return -1;
-}
-
/* Parse the Content-Length header field of an HTTP/2 request. The function
* checks all possible occurrences of a comma-delimited value, and verifies
* if any of them doesn't match a previous value. It returns <0 if a value
projects / thirdparty / haproxy.git / commitdiff
