/src/nghttp2/lib/nghttp2_http.c

Source
/*
 * nghttp2 - HTTP/2 C Library
 *
 * Copyright (c) 2015 Tatsuhiro Tsujikawa
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
#include "nghttp2_http.h"

#include <string.h>
#include <assert.h>
#include <stdio.h>

#include "nghttp2_hd.h"
#include "nghttp2_helper.h"
#include "nghttp2_extpri.h"
#include "sfparse.h"

/*
 * memieq returns nonzero if the data pointed by |a| of length |n|
 * equals to |b| of the same length in case-insensitive manner.  The
 * data pointed by |a| must not include upper cased letters (A-Z).
 */
static int memieq(const void *a, const void *b, size_t n) {
  size_t i;
  const uint8_t *aa = a, *bb = b;

  for (i = 0; i < n; ++i) {
    if (aa[i] != nghttp2_downcase_byte(bb[i])) {
      return 0;
    }
  }
  return 1;
}

#define lstrieq(A, B, N)                                                       \
  (nghttp2_strlen_lit((A)) == (N) && memieq((A), (B), (N)))

static int32_t parse_status_code(const uint8_t *s, size_t len) {
  if (len != 3 || '1' > s[0] || s[0] > '9' || '0' > s[1] || s[1] > '9' ||
      '0' > s[2] || s[2] > '9') {
    return -1;
  }

  return (s[0] - '0') * 100 + (s[1] - '0') * 10 + (s[2] - '0');
}

static int64_t parse_uint(const uint8_t *s, size_t len) {
  uint64_t n = 0;
  uint32_t c;
  size_t i;

  if (len == 0) {
    return -1;
  }

  for (i = 0; i < len; ++i) {
    if ('0' > s[i] || s[i] > '9') {
      return -1;
    }

    c = s[i] - '0';

    if (n > ((uint64_t)INT64_MAX - c) / 10) {
      return -1;
    }

    n = n * 10 + c;
  }

  return (int64_t)n;
}

static int check_pseudo_header(nghttp2_stream *stream, const nghttp2_hd_nv *nv,
                               uint32_t flag) {
  if ((stream->http_flags & flag) || nv->value->len == 0) {
    return 0;
  }
  stream->http_flags = stream->http_flags | flag;
  return 1;
}

static int expect_response_body(nghttp2_stream *stream) {
  return (stream->http_flags & NGHTTP2_HTTP_FLAG_METH_HEAD) == 0 &&
         stream->status_code / 100 != 1 && stream->status_code != 304 &&
         stream->status_code != 204;
}

/* For "http" or "https" URIs, OPTIONS request may have "*" in :path
   header field to represent system-wide OPTIONS request.  Otherwise,
   :path header field value must start with "/".  This function must
   be called after ":method" header field was received.  This function
   returns nonzero if path is valid.*/
static int check_path(nghttp2_stream *stream) {
  return (stream->http_flags & NGHTTP2_HTTP_FLAG_SCHEME_HTTP) == 0 ||
         ((stream->http_flags & NGHTTP2_HTTP_FLAG_PATH_REGULAR) ||
          ((stream->http_flags & NGHTTP2_HTTP_FLAG_METH_OPTIONS) &&
           (stream->http_flags & NGHTTP2_HTTP_FLAG_PATH_ASTERISK)));
}

static int check_scheme(const uint8_t *value, size_t len) {
  const uint8_t *last;
  if (len == 0) {
    return 0;
  }

  if (!(('A' <= *value && *value <= 'Z') || ('a' <= *value && *value <= 'z'))) {
    return 0;
  }

  last = value + len;
  ++value;

  for (; value != last; ++value) {
    if (!(('A' <= *value && *value <= 'Z') ||
          ('a' <= *value && *value <= 'z') ||
          ('0' <= *value && *value <= '9') || *value == '+' || *value == '-' ||
          *value == '.')) {
      return 0;
    }
  }
  return 1;
}

static int lws(const uint8_t *s, size_t n) {
  size_t i;
  for (i = 0; i < n; ++i) {
    if (s[i] != ' ' && s[i] != '\t') {
      return 0;
    }
  }
  return 1;
}

/* Same as the array in nghttp2_helper.c, but '@' is not allowed */
static const uint8_t VALID_AUTHORITY_CHARS[256] = {
  ['!'] = 1, ['$'] = 1, ['%'] = 1, ['&'] = 1, ['\''] = 1, ['('] = 1, [')'] = 1,
  ['*'] = 1, ['+'] = 1, [','] = 1, ['-'] = 1, ['.'] = 1,  ['0'] = 1, ['1'] = 1,
  ['2'] = 1, ['3'] = 1, ['4'] = 1, ['5'] = 1, ['6'] = 1,  ['7'] = 1, ['8'] = 1,
  ['9'] = 1, [':'] = 1, [';'] = 1, ['='] = 1, ['A'] = 1,  ['B'] = 1, ['C'] = 1,
  ['D'] = 1, ['E'] = 1, ['F'] = 1, ['G'] = 1, ['H'] = 1,  ['I'] = 1, ['J'] = 1,
  ['K'] = 1, ['L'] = 1, ['M'] = 1, ['N'] = 1, ['O'] = 1,  ['P'] = 1, ['Q'] = 1,
  ['R'] = 1, ['S'] = 1, ['T'] = 1, ['U'] = 1, ['V'] = 1,  ['W'] = 1, ['X'] = 1,
  ['Y'] = 1, ['Z'] = 1, ['['] = 1, [']'] = 1, ['_'] = 1,  ['a'] = 1, ['b'] = 1,
  ['c'] = 1, ['d'] = 1, ['e'] = 1, ['f'] = 1, ['g'] = 1,  ['h'] = 1, ['i'] = 1,
  ['j'] = 1, ['k'] = 1, ['l'] = 1, ['m'] = 1, ['n'] = 1,  ['o'] = 1, ['p'] = 1,
  ['q'] = 1, ['r'] = 1, ['s'] = 1, ['t'] = 1, ['u'] = 1,  ['v'] = 1, ['w'] = 1,
  ['x'] = 1, ['y'] = 1, ['z'] = 1, ['~'] = 1,
};

static int check_authority(const uint8_t *value, size_t len) {
  const uint8_t *last;
  for (last = value + len; value != last; ++value) {
    if (!VALID_AUTHORITY_CHARS[*value]) {
      return 0;
    }
  }
  return 1;
}

static int check_header_value(const nghttp2_stream *stream,
                              const nghttp2_rcbuf *value) {
  if (stream->flags &
      NGHTTP2_STREAM_FLAG_NO_RFC9113_LEADING_AND_TRAILING_WS_VALIDATION) {
    return nghttp2_check_header_value(value->base, value->len);
  }

  return nghttp2_check_header_value_rfc9113(value->base, value->len);
}

static int http_request_on_header(nghttp2_stream *stream, nghttp2_hd_nv *nv,
                                  int trailer, int connect_protocol) {
  nghttp2_extpri extpri;

  switch (nv->token) {
  case NGHTTP2_TOKEN__AUTHORITY:
    if (!check_authority(nv->value->base, nv->value->len) ||
        !check_pseudo_header(stream, nv, NGHTTP2_HTTP_FLAG__AUTHORITY)) {
      return NGHTTP2_ERR_HTTP_HEADER;
    }
    break;
  case NGHTTP2_TOKEN__METHOD:
    if (!nghttp2_check_method(nv->value->base, nv->value->len) ||
        !check_pseudo_header(stream, nv, NGHTTP2_HTTP_FLAG__METHOD)) {
      return NGHTTP2_ERR_HTTP_HEADER;
    }
    switch (nv->value->len) {
    case 4:
      if (lstreq("HEAD", nv->value->base, nv->value->len)) {
        stream->http_flags |= NGHTTP2_HTTP_FLAG_METH_HEAD;
      }
      break;
    case 7:
      switch (nv->value->base[6]) {
      case 'T':
        if (lstreq("CONNECT", nv->value->base, nv->value->len)) {
          if (stream->stream_id % 2 == 0) {
            /* we won't allow CONNECT for push */
            return NGHTTP2_ERR_HTTP_HEADER;
          }
          stream->http_flags |= NGHTTP2_HTTP_FLAG_METH_CONNECT;
        }
        break;
      case 'S':
        if (lstreq("OPTIONS", nv->value->base, nv->value->len)) {
          stream->http_flags |= NGHTTP2_HTTP_FLAG_METH_OPTIONS;
        }
        break;
      }
      break;
    }
    break;
  case NGHTTP2_TOKEN__PATH:
    if (!nghttp2_check_path(nv->value->base, nv->value->len) ||
        !check_pseudo_header(stream, nv, NGHTTP2_HTTP_FLAG__PATH)) {
      return NGHTTP2_ERR_HTTP_HEADER;
    }
    if (nv->value->base[0] == '/') {
      stream->http_flags |= NGHTTP2_HTTP_FLAG_PATH_REGULAR;
    } else if (nv->value->len == 1 && nv->value->base[0] == '*') {
      stream->http_flags |= NGHTTP2_HTTP_FLAG_PATH_ASTERISK;
    }
    break;
  case NGHTTP2_TOKEN__SCHEME:
    if (!check_scheme(nv->value->base, nv->value->len) ||
        !check_pseudo_header(stream, nv, NGHTTP2_HTTP_FLAG__SCHEME)) {
      return NGHTTP2_ERR_HTTP_HEADER;
    }
    if ((nv->value->len == 4 && memieq("http", nv->value->base, 4)) ||
        (nv->value->len == 5 && memieq("https", nv->value->base, 5))) {
      stream->http_flags |= NGHTTP2_HTTP_FLAG_SCHEME_HTTP;
    }
    break;
  case NGHTTP2_TOKEN__PROTOCOL:
    if (!connect_protocol ||
        !check_pseudo_header(stream, nv, NGHTTP2_HTTP_FLAG__PROTOCOL)) {
      return NGHTTP2_ERR_HTTP_HEADER;
    }
    if (stream->flags &
        NGHTTP2_STREAM_FLAG_NO_RFC9113_LEADING_AND_TRAILING_WS_VALIDATION) {
      /* Check the value consists of just white spaces, which was done
         in check_pseudo_header before
         nghttp2_check_header_value_rfc9113 has been introduced. */
      if (lws(nv->value->base, nv->value->len) ||
          !nghttp2_check_header_value(nv->value->base, nv->value->len)) {
        return NGHTTP2_ERR_HTTP_HEADER;
      }
    } else if (!nghttp2_check_header_value_rfc9113(nv->value->base,
                                                   nv->value->len)) {
      return NGHTTP2_ERR_HTTP_HEADER;
    }
    break;
  case NGHTTP2_TOKEN_HOST:
    if (!check_authority(nv->value->base, nv->value->len)) {
      return NGHTTP2_ERR_IGN_HTTP_HEADER;
    }
    if (!check_pseudo_header(stream, nv, NGHTTP2_HTTP_FLAG_HOST)) {
      return NGHTTP2_ERR_HTTP_HEADER;
    }
    break;
  case NGHTTP2_TOKEN_CONTENT_LENGTH: {
    if (stream->content_length != -1) {
      return NGHTTP2_ERR_HTTP_HEADER;
    }
    stream->content_length = parse_uint(nv->value->base, nv->value->len);
    if (stream->content_length == -1) {
      return NGHTTP2_ERR_HTTP_HEADER;
    }
    break;
  }
  /* disallowed header fields */
  case NGHTTP2_TOKEN_CONNECTION:
  case NGHTTP2_TOKEN_KEEP_ALIVE:
  case NGHTTP2_TOKEN_PROXY_CONNECTION:
  case NGHTTP2_TOKEN_TRANSFER_ENCODING:
  case NGHTTP2_TOKEN_UPGRADE:
    return NGHTTP2_ERR_HTTP_HEADER;
  case NGHTTP2_TOKEN_TE:
    if (!lstrieq("trailers", nv->value->base, nv->value->len)) {
      return NGHTTP2_ERR_HTTP_HEADER;
    }
    break;
  case NGHTTP2_TOKEN_PRIORITY:
    if (!check_header_value(stream, nv->value)) {
      stream->http_flags &= ~NGHTTP2_HTTP_FLAG_PRIORITY;
      stream->http_flags |= NGHTTP2_HTTP_FLAG_BAD_PRIORITY;

      return NGHTTP2_ERR_IGN_HTTP_HEADER;
    }

    if (!trailer &&
        /* Do not parse the header field in PUSH_PROMISE. */
        (stream->stream_id & 1) &&
        !(stream->http_flags & NGHTTP2_HTTP_FLAG_BAD_PRIORITY)) {
      nghttp2_extpri_from_uint8(&extpri, stream->http_extpri);
      if (nghttp2_http_parse_priority(&extpri, nv->value->base,
                                      nv->value->len) == 0) {
        stream->http_extpri = nghttp2_extpri_to_uint8(&extpri);
        stream->http_flags |= NGHTTP2_HTTP_FLAG_PRIORITY;
      } else {
        stream->http_flags &= ~NGHTTP2_HTTP_FLAG_PRIORITY;
        stream->http_flags |= NGHTTP2_HTTP_FLAG_BAD_PRIORITY;
      }
    }
    break;
  default:
    if (nv->name->base[0] == ':') {
      return NGHTTP2_ERR_HTTP_HEADER;
    }

    if (!check_header_value(stream, nv->value)) {
      return NGHTTP2_ERR_IGN_HTTP_HEADER;
    }
  }

  return 0;
}

static int http_response_on_header(nghttp2_stream *stream, nghttp2_hd_nv *nv) {
  switch (nv->token) {
  case NGHTTP2_TOKEN__STATUS: {
    if (!check_pseudo_header(stream, nv, NGHTTP2_HTTP_FLAG__STATUS)) {
      return NGHTTP2_ERR_HTTP_HEADER;
    }
    stream->status_code = parse_status_code(nv->value->base, nv->value->len);
    if (stream->status_code == -1 || stream->status_code == 101) {
      return NGHTTP2_ERR_HTTP_HEADER;
    }
    break;
  }
  case NGHTTP2_TOKEN_CONTENT_LENGTH: {
    if (stream->status_code == 204) {
      /* content-length header field in 204 response is prohibited by
         RFC 7230.  But some widely used servers send content-length:
         0.  Until they get fixed, we ignore it. */
      if (stream->content_length != -1) {
        /* Found multiple content-length field */
        return NGHTTP2_ERR_HTTP_HEADER;
      }
      if (!lstrieq("0", nv->value->base, nv->value->len)) {
        return NGHTTP2_ERR_HTTP_HEADER;
      }
      stream->content_length = 0;
      return NGHTTP2_ERR_REMOVE_HTTP_HEADER;
    }
    if (stream->status_code / 100 == 1) {
      return NGHTTP2_ERR_HTTP_HEADER;
    }
    /* https://tools.ietf.org/html/rfc7230#section-3.3.3 */
    if (stream->status_code / 100 == 2 &&
        (stream->http_flags & NGHTTP2_HTTP_FLAG_METH_CONNECT)) {
      return NGHTTP2_ERR_REMOVE_HTTP_HEADER;
    }
    if (stream->content_length != -1) {
      return NGHTTP2_ERR_HTTP_HEADER;
    }
    stream->content_length = parse_uint(nv->value->base, nv->value->len);
    if (stream->content_length == -1) {
      return NGHTTP2_ERR_HTTP_HEADER;
    }
    break;
  }
  /* disallowed header fields */
  case NGHTTP2_TOKEN_CONNECTION:
  case NGHTTP2_TOKEN_KEEP_ALIVE:
  case NGHTTP2_TOKEN_PROXY_CONNECTION:
  case NGHTTP2_TOKEN_TRANSFER_ENCODING:
  case NGHTTP2_TOKEN_UPGRADE:
    return NGHTTP2_ERR_HTTP_HEADER;
  case NGHTTP2_TOKEN_TE:
    if (!lstrieq("trailers", nv->value->base, nv->value->len)) {
      return NGHTTP2_ERR_HTTP_HEADER;
    }
    break;
  default:
    if (nv->name->base[0] == ':') {
      return NGHTTP2_ERR_HTTP_HEADER;
    }

    if (!check_header_value(stream, nv->value)) {
      return NGHTTP2_ERR_IGN_HTTP_HEADER;
    }
  }

  return 0;
}

int nghttp2_http_on_header(nghttp2_session *session, nghttp2_stream *stream,
                           const nghttp2_frame *frame, nghttp2_hd_nv *nv,
                           int trailer) {
  /* We are strict for pseudo header field.  One bad character should
     lead to fail.  OTOH, we should be a bit forgiving for regular
     headers, since existing public internet has so much illegal
     headers floating around and if we kill the stream because of
     this, we may disrupt many web sites and/or libraries.  So we
     become conservative here, and just ignore those illegal regular
     headers. */
  if (nv->name->len == 0) {
    stream->http_flags |= NGHTTP2_HTTP_FLAG_PSEUDO_HEADER_DISALLOWED;
    return NGHTTP2_ERR_IGN_HTTP_HEADER;
  }

  if (nv->name->base[0] == ':') {
    /* pseudo header must have a valid token. */
    if (nv->token == -1 || trailer ||
        (stream->http_flags & NGHTTP2_HTTP_FLAG_PSEUDO_HEADER_DISALLOWED)) {
      return NGHTTP2_ERR_HTTP_HEADER;
    }
  } else {
    stream->http_flags |= NGHTTP2_HTTP_FLAG_PSEUDO_HEADER_DISALLOWED;

    switch (nghttp2_check_nonempty_header_name(nv->name->base, nv->name->len)) {
    case 0:
      return NGHTTP2_ERR_IGN_HTTP_HEADER;
    case 2:
      /* header field name must be lower-cased without exception */
      return NGHTTP2_ERR_HTTP_HEADER;
    }
  }

  assert(nv->name->len > 0);

  if (session->server || frame->hd.type == NGHTTP2_PUSH_PROMISE) {
    return http_request_on_header(stream, nv, trailer,
                                  session->server &&
                                    session->pending_enable_connect_protocol);
  }

  return http_response_on_header(stream, nv);
}

int nghttp2_http_on_request_headers(nghttp2_stream *stream,
                                    nghttp2_frame *frame) {
  if (!(stream->http_flags & NGHTTP2_HTTP_FLAG__PROTOCOL) &&
      (stream->http_flags & NGHTTP2_HTTP_FLAG_METH_CONNECT)) {
    if ((stream->http_flags &
         (NGHTTP2_HTTP_FLAG__SCHEME | NGHTTP2_HTTP_FLAG__PATH)) ||
        (stream->http_flags & NGHTTP2_HTTP_FLAG__AUTHORITY) == 0) {
      return -1;
    }
    stream->content_length = -1;
  } else {
    if ((stream->http_flags & NGHTTP2_HTTP_FLAG_REQ_HEADERS) !=
          NGHTTP2_HTTP_FLAG_REQ_HEADERS ||
        (stream->http_flags &
         (NGHTTP2_HTTP_FLAG__AUTHORITY | NGHTTP2_HTTP_FLAG_HOST)) == 0) {
      return -1;
    }
    if ((stream->http_flags & NGHTTP2_HTTP_FLAG__PROTOCOL) &&
        ((stream->http_flags & NGHTTP2_HTTP_FLAG_METH_CONNECT) == 0 ||
         (stream->http_flags & NGHTTP2_HTTP_FLAG__AUTHORITY) == 0)) {
      return -1;
    }
    if (!check_path(stream)) {
      return -1;
    }
  }

  if (frame->hd.type == NGHTTP2_PUSH_PROMISE) {
    /* we are going to reuse data fields for upcoming response.  Clear
       them now, except for method flags. */
    stream->http_flags &= NGHTTP2_HTTP_FLAG_METH_ALL;
    stream->content_length = -1;
  }

  return 0;
}

int nghttp2_http_on_response_headers(nghttp2_stream *stream) {
  if ((stream->http_flags & NGHTTP2_HTTP_FLAG__STATUS) == 0) {
    return -1;
  }

  if (stream->status_code / 100 == 1) {
    /* non-final response */
    stream->http_flags = (stream->http_flags & NGHTTP2_HTTP_FLAG_METH_ALL) |
                         NGHTTP2_HTTP_FLAG_EXPECT_FINAL_RESPONSE;
    stream->content_length = -1;
    stream->status_code = -1;
    return 0;
  }

  stream->http_flags =
    stream->http_flags & ~NGHTTP2_HTTP_FLAG_EXPECT_FINAL_RESPONSE;

  if (!expect_response_body(stream)) {
    stream->content_length = 0;
  } else if (stream->http_flags & (NGHTTP2_HTTP_FLAG_METH_CONNECT |
                                   NGHTTP2_HTTP_FLAG_METH_UPGRADE_WORKAROUND)) {
    stream->content_length = -1;
  }

  return 0;
}

int nghttp2_http_on_trailer_headers(nghttp2_stream *stream,
                                    nghttp2_frame *frame) {
  (void)stream;

  if ((frame->hd.flags & NGHTTP2_FLAG_END_STREAM) == 0) {
    return -1;
  }

  return 0;
}

int nghttp2_http_on_remote_end_stream(nghttp2_stream *stream) {
  if (stream->http_flags & NGHTTP2_HTTP_FLAG_EXPECT_FINAL_RESPONSE) {
    return -1;
  }

  if (stream->content_length != -1 &&
      stream->content_length != stream->recv_content_length) {
    return -1;
  }

  return 0;
}

int nghttp2_http_on_data_chunk(nghttp2_stream *stream, size_t n) {
  stream->recv_content_length += (int64_t)n;

  if ((stream->http_flags & NGHTTP2_HTTP_FLAG_EXPECT_FINAL_RESPONSE) ||
      (stream->content_length != -1 &&
       stream->recv_content_length > stream->content_length)) {
    return -1;
  }

  return 0;
}

void nghttp2_http_record_request_method(nghttp2_stream *stream,
                                        nghttp2_frame *frame) {
  const nghttp2_nv *nva;
  size_t nvlen;
  size_t i;

  switch (frame->hd.type) {
  case NGHTTP2_HEADERS:
    nva = frame->headers.nva;
    nvlen = frame->headers.nvlen;
    break;
  case NGHTTP2_PUSH_PROMISE:
    nva = frame->push_promise.nva;
    nvlen = frame->push_promise.nvlen;
    break;
  default:
    return;
  }

  /* TODO we should do this strictly. */
  for (i = 0; i < nvlen; ++i) {
    const nghttp2_nv *nv = &nva[i];
    if (!(nv->namelen == 7 && nv->name[6] == 'd' &&
          memcmp(":metho", nv->name, nv->namelen - 1) == 0)) {
      continue;
    }
    if (lstreq("CONNECT", nv->value, nv->valuelen)) {
      stream->http_flags |= NGHTTP2_HTTP_FLAG_METH_CONNECT;
      return;
    }
    if (lstreq("HEAD", nv->value, nv->valuelen)) {
      stream->http_flags |= NGHTTP2_HTTP_FLAG_METH_HEAD;
      return;
    }
    return;
  }
}

int nghttp2_http_parse_priority(nghttp2_extpri *dest, const uint8_t *value,
                                size_t valuelen) {
  nghttp2_extpri pri = *dest;
  sfparse_parser sfp;
  sfparse_vec key;
  sfparse_value val;
  int rv;

  sfparse_parser_init(&sfp, value, valuelen);

  for (;;) {
    rv = sfparse_parser_dict(&sfp, &key, &val);
    if (rv != 0) {
      if (rv == SFPARSE_ERR_EOF) {
        break;
      }

      return NGHTTP2_ERR_INVALID_ARGUMENT;
    }

    if (key.len != 1) {
      continue;
    }

    switch (key.base[0]) {
    case 'i':
      if (val.type != SFPARSE_TYPE_BOOLEAN) {
        return NGHTTP2_ERR_INVALID_ARGUMENT;
      }

      pri.inc = val.boolean;

      break;
    case 'u':
      if (val.type != SFPARSE_TYPE_INTEGER ||
          val.integer < NGHTTP2_EXTPRI_URGENCY_HIGH ||
          NGHTTP2_EXTPRI_URGENCY_LOW < val.integer) {
        return NGHTTP2_ERR_INVALID_ARGUMENT;
      }

      pri.urgency = (uint32_t)val.integer;

      break;
    }
  }

  *dest = pri;

  return 0;
}

Coverage Report

Created: 2026-10-17 06:52

Line	Count	Source
1		/*
2		* nghttp2 - HTTP/2 C Library
3		*
4		* Copyright (c) 2015 Tatsuhiro Tsujikawa
5		*
6		* Permission is hereby granted, free of charge, to any person obtaining
7		* a copy of this software and associated documentation files (the
8		* "Software"), to deal in the Software without restriction, including
9		* without limitation the rights to use, copy, modify, merge, publish,
10		* distribute, sublicense, and/or sell copies of the Software, and to
11		* permit persons to whom the Software is furnished to do so, subject to
12		* the following conditions:
13		*
14		* The above copyright notice and this permission notice shall be
15		* included in all copies or substantial portions of the Software.
16		*
17		* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18		* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19		* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
20		* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
21		* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
22		* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
23		* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24		*/
25		#include "nghttp2_http.h"
26
27		#include <string.h>
28		#include <assert.h>
29		#include <stdio.h>
30
31		#include "nghttp2_hd.h"
32		#include "nghttp2_helper.h"
33		#include "nghttp2_extpri.h"
34		#include "sfparse.h"
35
36		/*
37		* memieq returns nonzero if the data pointed by \|a\| of length \|n\|
38		* equals to \|b\| of the same length in case-insensitive manner. The
39		* data pointed by \|a\| must not include upper cased letters (A-Z).
40		*/
41	2.32k	static int memieq(const void a, const void b, size_t n) {
42	2.32k	size_t i;
43	2.32k	const uint8_t aa = a, bb = b;
44
45	11.7k	for (i = 0; i < n; ++i) {
46	10.1k	if (aa[i] != nghttp2_downcase_byte(bb[i])) {
47	723	return 0;
48	723	}
49	10.1k	}
50	1.60k	return 1;
51	2.32k	}
52
53		#define lstrieq(A, B, N) \
54	602	(nghttp2_strlen_lit((A)) == (N) && memieq((A), (B), (N)))
55
56	0	static int32_t parse_status_code(const uint8_t *s, size_t len) {
57	0	if (len != 3 \|\| '1' > s[0] \|\| s[0] > '9' \|\| '0' > s[1] \|\| s[1] > '9' \|\|
58	0	'0' > s[2] \|\| s[2] > '9') {
59	0	return -1;
60	0	}
61
62	0	return (s[0] - '0') * 100 + (s[1] - '0') * 10 + (s[2] - '0');
63	0	}
64
65	744	static int64_t parse_uint(const uint8_t *s, size_t len) {
66	744	uint64_t n = 0;
67	744	uint32_t c;
68	744	size_t i;
69
70	744	if (len == 0) {
71	54	return -1;
72	54	}
73
74	6.93k	for (i = 0; i < len; ++i) {
75	6.38k	if ('0' > s[i] \|\| s[i] > '9') {
76	46	return -1;
77	46	}
78
79	6.34k	c = s[i] - '0';
80
81	6.34k	if (n > ((uint64_t)INT64_MAX - c) / 10) {
82	97	return -1;
83	97	}
84
85	6.24k	n = n * 10 + c;
86	6.24k	}
87
88	547	return (int64_t)n;
89	690	}
90
91		static int check_pseudo_header(nghttp2_stream stream, const nghttp2_hd_nv nv,
92	7.13k	uint32_t flag) {
93	7.13k	if ((stream->http_flags & flag) \|\| nv->value->len == 0) {
94	441	return 0;
95	441	}
96	6.69k	stream->http_flags = stream->http_flags \| flag;
97	6.69k	return 1;
98	7.13k	}
99
100	0	static int expect_response_body(nghttp2_stream *stream) {
101	0	return (stream->http_flags & NGHTTP2_HTTP_FLAG_METH_HEAD) == 0 &&
102	0	stream->status_code / 100 != 1 && stream->status_code != 304 &&
103	0	stream->status_code != 204;
104	0	}
105
106		/* For "http" or "https" URIs, OPTIONS request may have "*" in :path
107		header field to represent system-wide OPTIONS request. Otherwise,
108		:path header field value must start with "/". This function must
109		be called after ":method" header field was received. This function
110		returns nonzero if path is valid.*/
111	988	static int check_path(nghttp2_stream *stream) {
112	988	return (stream->http_flags & NGHTTP2_HTTP_FLAG_SCHEME_HTTP) == 0 \|\|
113	978	((stream->http_flags & NGHTTP2_HTTP_FLAG_PATH_REGULAR) \|\|
114	18	((stream->http_flags & NGHTTP2_HTTP_FLAG_METH_OPTIONS) &&
115	0	(stream->http_flags & NGHTTP2_HTTP_FLAG_PATH_ASTERISK)));
116	988	}
117
118	2.38k	static int check_scheme(const uint8_t *value, size_t len) {
119	2.38k	const uint8_t *last;
120	2.38k	if (len == 0) {
121	46	return 0;
122	46	}
123
124	2.33k	if (!(('A' <= value && value <= 'Z') \|\| ('a' <= value && value <= 'z'))) {
125	131	return 0;
126	131	}
127
128	2.20k	last = value + len;
129	2.20k	++value;
130
131	14.9k	for (; value != last; ++value) {
132	12.8k	if (!(('A' <= value && value <= 'Z') \|\|
133	12.0k	('a' <= value && value <= 'z') \|\|
134	5.87k	('0' <= value && value <= '9') \|\| value == '+' \|\| value == '-' \|\|
135	191	*value == '.')) {
136	125	return 0;
137	125	}
138	12.8k	}
139	2.08k	return 1;
140	2.20k	}
141
142	0	static int lws(const uint8_t *s, size_t n) {
143	0	size_t i;
144	0	for (i = 0; i < n; ++i) {
145	0	if (s[i] != ' ' && s[i] != '\t') {
146	0	return 0;
147	0	}
148	0	}
149	0	return 1;
150	0	}
151
152		/* Same as the array in nghttp2_helper.c, but '@' is not allowed */
153		static const uint8_t VALID_AUTHORITY_CHARS[256] = {
154		['!'] = 1, ['$'] = 1, ['%'] = 1, ['&'] = 1, ['\''] = 1, ['('] = 1, [')'] = 1,
155		['*'] = 1, ['+'] = 1, [','] = 1, ['-'] = 1, ['.'] = 1, ['0'] = 1, ['1'] = 1,
156		['2'] = 1, ['3'] = 1, ['4'] = 1, ['5'] = 1, ['6'] = 1, ['7'] = 1, ['8'] = 1,
157		['9'] = 1, [':'] = 1, [';'] = 1, ['='] = 1, ['A'] = 1, ['B'] = 1, ['C'] = 1,
158		['D'] = 1, ['E'] = 1, ['F'] = 1, ['G'] = 1, ['H'] = 1, ['I'] = 1, ['J'] = 1,
159		['K'] = 1, ['L'] = 1, ['M'] = 1, ['N'] = 1, ['O'] = 1, ['P'] = 1, ['Q'] = 1,
160		['R'] = 1, ['S'] = 1, ['T'] = 1, ['U'] = 1, ['V'] = 1, ['W'] = 1, ['X'] = 1,
161		['Y'] = 1, ['Z'] = 1, ['['] = 1, [']'] = 1, ['_'] = 1, ['a'] = 1, ['b'] = 1,
162		['c'] = 1, ['d'] = 1, ['e'] = 1, ['f'] = 1, ['g'] = 1, ['h'] = 1, ['i'] = 1,
163		['j'] = 1, ['k'] = 1, ['l'] = 1, ['m'] = 1, ['n'] = 1, ['o'] = 1, ['p'] = 1,
164		['q'] = 1, ['r'] = 1, ['s'] = 1, ['t'] = 1, ['u'] = 1, ['v'] = 1, ['w'] = 1,
165		['x'] = 1, ['y'] = 1, ['z'] = 1, ['~'] = 1,
166		};
167
168	1.82k	static int check_authority(const uint8_t *value, size_t len) {
169	1.82k	const uint8_t *last;
170	9.82k	for (last = value + len; value != last; ++value) {
171	8.34k	if (!VALID_AUTHORITY_CHARS[*value]) {
172	334	return 0;
173	334	}
174	8.34k	}
175	1.48k	return 1;
176	1.82k	}
177
178		static int check_header_value(const nghttp2_stream *stream,
179	22.3k	const nghttp2_rcbuf *value) {
180	22.3k	if (stream->flags &
181	22.3k	NGHTTP2_STREAM_FLAG_NO_RFC9113_LEADING_AND_TRAILING_WS_VALIDATION) {
182	0	return nghttp2_check_header_value(value->base, value->len);
183	0	}
184
185	22.3k	return nghttp2_check_header_value_rfc9113(value->base, value->len);
186	22.3k	}
187
188		static int http_request_on_header(nghttp2_stream stream, nghttp2_hd_nv nv,
189	32.0k	int trailer, int connect_protocol) {
190	32.0k	nghttp2_extpri extpri;
191
192	32.0k	switch (nv->token) {
193	1.26k	case NGHTTP2_TOKEN__AUTHORITY:
194	1.26k	if (!check_authority(nv->value->base, nv->value->len) \|\|
195	1.17k	!check_pseudo_header(stream, nv, NGHTTP2_HTTP_FLAG__AUTHORITY)) {
196	212	return NGHTTP2_ERR_HTTP_HEADER;
197	212	}
198	1.05k	break;
199	1.95k	case NGHTTP2_TOKEN__METHOD:
200	1.95k	if (!nghttp2_check_method(nv->value->base, nv->value->len) \|\|
201	1.77k	!check_pseudo_header(stream, nv, NGHTTP2_HTTP_FLAG__METHOD)) {
202	224	return NGHTTP2_ERR_HTTP_HEADER;
203	224	}
204	1.72k	switch (nv->value->len) {
205	744	case 4:
206	744	if (lstreq("HEAD", nv->value->base, nv->value->len)) {
207	34	stream->http_flags \|= NGHTTP2_HTTP_FLAG_METH_HEAD;
208	34	}
209	744	break;
210	218	case 7:
211	218	switch (nv->value->base[6]) {
212	115	case 'T':
213	115	if (lstreq("CONNECT", nv->value->base, nv->value->len)) {
214	81	if (stream->stream_id % 2 == 0) {
215		/* we won't allow CONNECT for push */
216	0	return NGHTTP2_ERR_HTTP_HEADER;
217	0	}
218	81	stream->http_flags \|= NGHTTP2_HTTP_FLAG_METH_CONNECT;
219	81	}
220	115	break;
221	115	case 'S':
222	69	if (lstreq("OPTIONS", nv->value->base, nv->value->len)) {
223	34	stream->http_flags \|= NGHTTP2_HTTP_FLAG_METH_OPTIONS;
224	34	}
225	69	break;
226	218	}
227	218	break;
228	1.72k	}
229	1.72k	break;
230	1.83k	case NGHTTP2_TOKEN__PATH:
231	1.83k	if (!nghttp2_check_path(nv->value->base, nv->value->len) \|\|
232	1.79k	!check_pseudo_header(stream, nv, NGHTTP2_HTTP_FLAG__PATH)) {
233	127	return NGHTTP2_ERR_HTTP_HEADER;
234	127	}
235	1.70k	if (nv->value->base[0] == '/') {
236	1.32k	stream->http_flags \|= NGHTTP2_HTTP_FLAG_PATH_REGULAR;
237	1.32k	} else if (nv->value->len == 1 && nv->value->base[0] == '*') {
238	238	stream->http_flags \|= NGHTTP2_HTTP_FLAG_PATH_ASTERISK;
239	238	}
240	1.70k	break;
241	2.38k	case NGHTTP2_TOKEN__SCHEME:
242	2.38k	if (!check_scheme(nv->value->base, nv->value->len) \|\|
243	2.08k	!check_pseudo_header(stream, nv, NGHTTP2_HTTP_FLAG__SCHEME)) {
244	407	return NGHTTP2_ERR_HTTP_HEADER;
245	407	}
246	1.97k	if ((nv->value->len == 4 && memieq("http", nv->value->base, 4)) \|\|
247	1.41k	(nv->value->len == 5 && memieq("https", nv->value->base, 5))) {
248	1.41k	stream->http_flags \|= NGHTTP2_HTTP_FLAG_SCHEME_HTTP;
249	1.41k	}
250	1.97k	break;
251	40	case NGHTTP2_TOKEN__PROTOCOL:
252	40	if (!connect_protocol \|\|
253	40	!check_pseudo_header(stream, nv, NGHTTP2_HTTP_FLAG__PROTOCOL)) {
254	40	return NGHTTP2_ERR_HTTP_HEADER;
255	40	}
256	0	if (stream->flags &
257	0	NGHTTP2_STREAM_FLAG_NO_RFC9113_LEADING_AND_TRAILING_WS_VALIDATION) {
258		/* Check the value consists of just white spaces, which was done
259		in check_pseudo_header before
260		nghttp2_check_header_value_rfc9113 has been introduced. */
261	0	if (lws(nv->value->base, nv->value->len) \|\|
262	0	!nghttp2_check_header_value(nv->value->base, nv->value->len)) {
263	0	return NGHTTP2_ERR_HTTP_HEADER;
264	0	}
265	0	} else if (!nghttp2_check_header_value_rfc9113(nv->value->base,
266	0	nv->value->len)) {
267	0	return NGHTTP2_ERR_HTTP_HEADER;
268	0	}
269	0	break;
270	551	case NGHTTP2_TOKEN_HOST:
271	551	if (!check_authority(nv->value->base, nv->value->len)) {
272	239	return NGHTTP2_ERR_IGN_HTTP_HEADER;
273	239	}
274	312	if (!check_pseudo_header(stream, nv, NGHTTP2_HTTP_FLAG_HOST)) {
275	87	return NGHTTP2_ERR_HTTP_HEADER;
276	87	}
277	225	break;
278	840	case NGHTTP2_TOKEN_CONTENT_LENGTH: {
279	840	if (stream->content_length != -1) {
280	96	return NGHTTP2_ERR_HTTP_HEADER;
281	96	}
282	744	stream->content_length = parse_uint(nv->value->base, nv->value->len);
283	744	if (stream->content_length == -1) {
284	197	return NGHTTP2_ERR_HTTP_HEADER;
285	197	}
286	547	break;
287	744	}
288		/* disallowed header fields */
289	547	case NGHTTP2_TOKEN_CONNECTION:
290	81	case NGHTTP2_TOKEN_KEEP_ALIVE:
291	121	case NGHTTP2_TOKEN_PROXY_CONNECTION:
292	184	case NGHTTP2_TOKEN_TRANSFER_ENCODING:
293	224	case NGHTTP2_TOKEN_UPGRADE:
294	224	return NGHTTP2_ERR_HTTP_HEADER;
295	602	case NGHTTP2_TOKEN_TE:
296	602	if (!lstrieq("trailers", nv->value->base, nv->value->len)) {
297	408	return NGHTTP2_ERR_HTTP_HEADER;
298	408	}
299	194	break;
300	7.86k	case NGHTTP2_TOKEN_PRIORITY:
301	7.86k	if (!check_header_value(stream, nv->value)) {
302	194	stream->http_flags &= ~NGHTTP2_HTTP_FLAG_PRIORITY;
303	194	stream->http_flags \|= NGHTTP2_HTTP_FLAG_BAD_PRIORITY;
304
305	194	return NGHTTP2_ERR_IGN_HTTP_HEADER;
306	194	}
307
308	7.67k	if (!trailer &&
309		/* Do not parse the header field in PUSH_PROMISE. */
310	7.47k	(stream->stream_id & 1) &&
311	7.47k	!(stream->http_flags & NGHTTP2_HTTP_FLAG_BAD_PRIORITY)) {
312	7.25k	nghttp2_extpri_from_uint8(&extpri, stream->http_extpri);
313	7.25k	if (nghttp2_http_parse_priority(&extpri, nv->value->base,
314	7.25k	nv->value->len) == 0) {
315	5.13k	stream->http_extpri = nghttp2_extpri_to_uint8(&extpri);
316	5.13k	stream->http_flags \|= NGHTTP2_HTTP_FLAG_PRIORITY;
317	5.13k	} else {
318	2.11k	stream->http_flags &= ~NGHTTP2_HTTP_FLAG_PRIORITY;
319	2.11k	stream->http_flags \|= NGHTTP2_HTTP_FLAG_BAD_PRIORITY;
320	2.11k	}
321	7.25k	}
322	7.67k	break;
323	14.5k	default:
324	14.5k	if (nv->name->base[0] == ':') {
325	92	return NGHTTP2_ERR_HTTP_HEADER;
326	92	}
327
328	14.4k	if (!check_header_value(stream, nv->value)) {
329	1.11k	return NGHTTP2_ERR_IGN_HTTP_HEADER;
330	1.11k	}
331	32.0k	}
332
333	28.4k	return 0;
334	32.0k	}
335
336	0	static int http_response_on_header(nghttp2_stream stream, nghttp2_hd_nv nv) {
337	0	switch (nv->token) {
338	0	case NGHTTP2_TOKEN__STATUS: {
339	0	if (!check_pseudo_header(stream, nv, NGHTTP2_HTTP_FLAG__STATUS)) {
340	0	return NGHTTP2_ERR_HTTP_HEADER;
341	0	}
342	0	stream->status_code = parse_status_code(nv->value->base, nv->value->len);
343	0	if (stream->status_code == -1 \|\| stream->status_code == 101) {
344	0	return NGHTTP2_ERR_HTTP_HEADER;
345	0	}
346	0	break;
347	0	}
348	0	case NGHTTP2_TOKEN_CONTENT_LENGTH: {
349	0	if (stream->status_code == 204) {
350		/* content-length header field in 204 response is prohibited by
351		RFC 7230. But some widely used servers send content-length:
352		0. Until they get fixed, we ignore it. */
353	0	if (stream->content_length != -1) {
354		/* Found multiple content-length field */
355	0	return NGHTTP2_ERR_HTTP_HEADER;
356	0	}
357	0	if (!lstrieq("0", nv->value->base, nv->value->len)) {
358	0	return NGHTTP2_ERR_HTTP_HEADER;
359	0	}
360	0	stream->content_length = 0;
361	0	return NGHTTP2_ERR_REMOVE_HTTP_HEADER;
362	0	}
363	0	if (stream->status_code / 100 == 1) {
364	0	return NGHTTP2_ERR_HTTP_HEADER;
365	0	}
366		/* https://tools.ietf.org/html/rfc7230#section-3.3.3 */
367	0	if (stream->status_code / 100 == 2 &&
368	0	(stream->http_flags & NGHTTP2_HTTP_FLAG_METH_CONNECT)) {
369	0	return NGHTTP2_ERR_REMOVE_HTTP_HEADER;
370	0	}
371	0	if (stream->content_length != -1) {
372	0	return NGHTTP2_ERR_HTTP_HEADER;
373	0	}
374	0	stream->content_length = parse_uint(nv->value->base, nv->value->len);
375	0	if (stream->content_length == -1) {
376	0	return NGHTTP2_ERR_HTTP_HEADER;
377	0	}
378	0	break;
379	0	}
380		/* disallowed header fields */
381	0	case NGHTTP2_TOKEN_CONNECTION:
382	0	case NGHTTP2_TOKEN_KEEP_ALIVE:
383	0	case NGHTTP2_TOKEN_PROXY_CONNECTION:
384	0	case NGHTTP2_TOKEN_TRANSFER_ENCODING:
385	0	case NGHTTP2_TOKEN_UPGRADE:
386	0	return NGHTTP2_ERR_HTTP_HEADER;
387	0	case NGHTTP2_TOKEN_TE:
388	0	if (!lstrieq("trailers", nv->value->base, nv->value->len)) {
389	0	return NGHTTP2_ERR_HTTP_HEADER;
390	0	}
391	0	break;
392	0	default:
393	0	if (nv->name->base[0] == ':') {
394	0	return NGHTTP2_ERR_HTTP_HEADER;
395	0	}
396
397	0	if (!check_header_value(stream, nv->value)) {
398	0	return NGHTTP2_ERR_IGN_HTTP_HEADER;
399	0	}
400	0	}
401
402	0	return 0;
403	0	}
404
405		int nghttp2_http_on_header(nghttp2_session session, nghttp2_stream stream,
406		const nghttp2_frame frame, nghttp2_hd_nv nv,
407	39.4k	int trailer) {
408		/* We are strict for pseudo header field. One bad character should
409		lead to fail. OTOH, we should be a bit forgiving for regular
410		headers, since existing public internet has so much illegal
411		headers floating around and if we kill the stream because of
412		this, we may disrupt many web sites and/or libraries. So we
413		become conservative here, and just ignore those illegal regular
414		headers. */
415	39.4k	if (nv->name->len == 0) {
416	4.28k	stream->http_flags \|= NGHTTP2_HTTP_FLAG_PSEUDO_HEADER_DISALLOWED;
417	4.28k	return NGHTTP2_ERR_IGN_HTTP_HEADER;
418	4.28k	}
419
420	35.1k	if (nv->name->base[0] == ':') {
421		/* pseudo header must have a valid token. */
422	7.76k	if (nv->token == -1 \|\| trailer \|\|
423	7.67k	(stream->http_flags & NGHTTP2_HTTP_FLAG_PSEUDO_HEADER_DISALLOWED)) {
424	198	return NGHTTP2_ERR_HTTP_HEADER;
425	198	}
426	27.3k	} else {
427	27.3k	stream->http_flags \|= NGHTTP2_HTTP_FLAG_PSEUDO_HEADER_DISALLOWED;
428
429	27.3k	switch (nghttp2_check_nonempty_header_name(nv->name->base, nv->name->len)) {
430	2.56k	case 0:
431	2.56k	return NGHTTP2_ERR_IGN_HTTP_HEADER;
432	308	case 2:
433		/* header field name must be lower-cased without exception */
434	308	return NGHTTP2_ERR_HTTP_HEADER;
435	27.3k	}
436	27.3k	}
437
438	35.1k	assert(nv->name->len > 0);
439
440	32.0k	if (session->server \|\| frame->hd.type == NGHTTP2_PUSH_PROMISE) {
441	32.0k	return http_request_on_header(stream, nv, trailer,
442	32.0k	session->server &&
443	32.0k	session->pending_enable_connect_protocol);
444	32.0k	}
445
446	0	return http_response_on_header(stream, nv);
447	32.0k	}
448
449		int nghttp2_http_on_request_headers(nghttp2_stream *stream,
450	6.65k	nghttp2_frame *frame) {
451	6.65k	if (!(stream->http_flags & NGHTTP2_HTTP_FLAG__PROTOCOL) &&
452	6.65k	(stream->http_flags & NGHTTP2_HTTP_FLAG_METH_CONNECT)) {
453	81	if ((stream->http_flags &
454	81	(NGHTTP2_HTTP_FLAG__SCHEME \| NGHTTP2_HTTP_FLAG__PATH)) \|\|
455	71	(stream->http_flags & NGHTTP2_HTTP_FLAG__AUTHORITY) == 0) {
456	71	return -1;
457	71	}
458	10	stream->content_length = -1;
459	6.57k	} else {
460	6.57k	if ((stream->http_flags & NGHTTP2_HTTP_FLAG_REQ_HEADERS) !=
461	6.57k	NGHTTP2_HTTP_FLAG_REQ_HEADERS \|\|
462	1.07k	(stream->http_flags &
463	5.58k	(NGHTTP2_HTTP_FLAG__AUTHORITY \| NGHTTP2_HTTP_FLAG_HOST)) == 0) {
464	5.58k	return -1;
465	5.58k	}
466	988	if ((stream->http_flags & NGHTTP2_HTTP_FLAG__PROTOCOL) &&
467	0	((stream->http_flags & NGHTTP2_HTTP_FLAG_METH_CONNECT) == 0 \|\|
468	0	(stream->http_flags & NGHTTP2_HTTP_FLAG__AUTHORITY) == 0)) {
469	0	return -1;
470	0	}
471	988	if (!check_path(stream)) {
472	18	return -1;
473	18	}
474	988	}
475
476	980	if (frame->hd.type == NGHTTP2_PUSH_PROMISE) {
477		/* we are going to reuse data fields for upcoming response. Clear
478		them now, except for method flags. */
479	0	stream->http_flags &= NGHTTP2_HTTP_FLAG_METH_ALL;
480	0	stream->content_length = -1;
481	0	}
482
483	980	return 0;
484	6.65k	}
485
486	0	int nghttp2_http_on_response_headers(nghttp2_stream *stream) {
487	0	if ((stream->http_flags & NGHTTP2_HTTP_FLAG__STATUS) == 0) {
488	0	return -1;
489	0	}
490
491	0	if (stream->status_code / 100 == 1) {
492		/* non-final response */
493	0	stream->http_flags = (stream->http_flags & NGHTTP2_HTTP_FLAG_METH_ALL) \|
494	0	NGHTTP2_HTTP_FLAG_EXPECT_FINAL_RESPONSE;
495	0	stream->content_length = -1;
496	0	stream->status_code = -1;
497	0	return 0;
498	0	}
499
500	0	stream->http_flags =
501	0	stream->http_flags & ~NGHTTP2_HTTP_FLAG_EXPECT_FINAL_RESPONSE;
502
503	0	if (!expect_response_body(stream)) {
504	0	stream->content_length = 0;
505	0	} else if (stream->http_flags & (NGHTTP2_HTTP_FLAG_METH_CONNECT \|
506	0	NGHTTP2_HTTP_FLAG_METH_UPGRADE_WORKAROUND)) {
507	0	stream->content_length = -1;
508	0	}
509
510	0	return 0;
511	0	}
512
513		int nghttp2_http_on_trailer_headers(nghttp2_stream *stream,
514	78	nghttp2_frame *frame) {
515	78	(void)stream;
516
517	78	if ((frame->hd.flags & NGHTTP2_FLAG_END_STREAM) == 0) {
518	52	return -1;
519	52	}
520
521	26	return 0;
522	78	}
523
524	422	int nghttp2_http_on_remote_end_stream(nghttp2_stream *stream) {
525	422	if (stream->http_flags & NGHTTP2_HTTP_FLAG_EXPECT_FINAL_RESPONSE) {
526	0	return -1;
527	0	}
528
529	422	if (stream->content_length != -1 &&
530	148	stream->content_length != stream->recv_content_length) {
531	136	return -1;
532	136	}
533
534	286	return 0;
535	422	}
536
537	295	int nghttp2_http_on_data_chunk(nghttp2_stream *stream, size_t n) {
538	295	stream->recv_content_length += (int64_t)n;
539
540	295	if ((stream->http_flags & NGHTTP2_HTTP_FLAG_EXPECT_FINAL_RESPONSE) \|\|
541	295	(stream->content_length != -1 &&
542	161	stream->recv_content_length > stream->content_length)) {
543	20	return -1;
544	20	}
545
546	275	return 0;
547	295	}
548
549		void nghttp2_http_record_request_method(nghttp2_stream *stream,
550	0	nghttp2_frame *frame) {
551	0	const nghttp2_nv *nva;
552	0	size_t nvlen;
553	0	size_t i;
554
555	0	switch (frame->hd.type) {
556	0	case NGHTTP2_HEADERS:
557	0	nva = frame->headers.nva;
558	0	nvlen = frame->headers.nvlen;
559	0	break;
560	0	case NGHTTP2_PUSH_PROMISE:
561	0	nva = frame->push_promise.nva;
562	0	nvlen = frame->push_promise.nvlen;
563	0	break;
564	0	default:
565	0	return;
566	0	}
567
568		/* TODO we should do this strictly. */
569	0	for (i = 0; i < nvlen; ++i) {
570	0	const nghttp2_nv *nv = &nva[i];
571	0	if (!(nv->namelen == 7 && nv->name[6] == 'd' &&
572	0	memcmp(":metho", nv->name, nv->namelen - 1) == 0)) {
573	0	continue;
574	0	}
575	0	if (lstreq("CONNECT", nv->value, nv->valuelen)) {
576	0	stream->http_flags \|= NGHTTP2_HTTP_FLAG_METH_CONNECT;
577	0	return;
578	0	}
579	0	if (lstreq("HEAD", nv->value, nv->valuelen)) {
580	0	stream->http_flags \|= NGHTTP2_HTTP_FLAG_METH_HEAD;
581	0	return;
582	0	}
583	0	return;
584	0	}
585	0	}
586
587		int nghttp2_http_parse_priority(nghttp2_extpri dest, const uint8_t value,
588	7.25k	size_t valuelen) {
589	7.25k	nghttp2_extpri pri = *dest;
590	7.25k	sfparse_parser sfp;
591	7.25k	sfparse_vec key;
592	7.25k	sfparse_value val;
593	7.25k	int rv;
594
595	7.25k	sfparse_parser_init(&sfp, value, valuelen);
596
597	15.7k	for (;;) {
598	15.7k	rv = sfparse_parser_dict(&sfp, &key, &val);
599	15.7k	if (rv != 0) {
600	7.06k	if (rv == SFPARSE_ERR_EOF) {
601	5.13k	break;
602	5.13k	}
603
604	1.92k	return NGHTTP2_ERR_INVALID_ARGUMENT;
605	7.06k	}
606
607	8.73k	if (key.len != 1) {
608	2.22k	continue;
609	2.22k	}
610
611	6.50k	switch (key.base[0]) {
612	693	case 'i':
613	693	if (val.type != SFPARSE_TYPE_BOOLEAN) {
614	36	return NGHTTP2_ERR_INVALID_ARGUMENT;
615	36	}
616
617	657	pri.inc = val.boolean;
618
619	657	break;
620	550	case 'u':
621	550	if (val.type != SFPARSE_TYPE_INTEGER \|\|
622	509	val.integer < NGHTTP2_EXTPRI_URGENCY_HIGH \|\|
623	429	NGHTTP2_EXTPRI_URGENCY_LOW < val.integer) {
624	158	return NGHTTP2_ERR_INVALID_ARGUMENT;
625	158	}
626
627	392	pri.urgency = (uint32_t)val.integer;
628
629	392	break;
630	6.50k	}
631	6.50k	}
632
633	5.13k	*dest = pri;
634
635	5.13k	return 0;
636	7.25k	}