/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: 2026-07-16 06:32

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	5.24k	static int memieq(const void a, const void b, size_t n) {
42	5.24k	size_t i;
43	5.24k	const uint8_t aa = a, bb = b;
44
45	27.1k	for (i = 0; i < n; ++i) {
46	22.6k	if (aa[i] != nghttp2_downcase_byte(bb[i])) {
47	718	return 0;
48	718	}
49	22.6k	}
50	4.52k	return 1;
51	5.24k	}
52
53		#define lstrieq(A, B, N) \
54	595	(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	1.71k	static int64_t parse_uint(const uint8_t *s, size_t len) {
66	1.71k	uint64_t n = 0;
67	1.71k	uint32_t c;
68	1.71k	size_t i;
69
70	1.71k	if (len == 0) {
71	46	return -1;
72	46	}
73
74	9.73k	for (i = 0; i < len; ++i) {
75	8.51k	if ('0' > s[i] \|\| s[i] > '9') {
76	341	return -1;
77	341	}
78
79	8.17k	c = s[i] - '0';
80
81	8.17k	if (n > ((uint64_t)INT64_MAX - c) / 10) {
82	103	return -1;
83	103	}
84
85	8.06k	n = n * 10 + c;
86	8.06k	}
87
88	1.22k	return (int64_t)n;
89	1.66k	}
90
91		static int check_pseudo_header(nghttp2_stream stream, const nghttp2_hd_nv nv,
92	17.3k	uint32_t flag) {
93	17.3k	if ((stream->http_flags & flag) \|\| nv->value->len == 0) {
94	542	return 0;
95	542	}
96	16.7k	stream->http_flags = stream->http_flags \| flag;
97	16.7k	return 1;
98	17.3k	}
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	2.45k	static int check_path(nghttp2_stream *stream) {
112	2.45k	return (stream->http_flags & NGHTTP2_HTTP_FLAG_SCHEME_HTTP) == 0 \|\|
113	2.44k	((stream->http_flags & NGHTTP2_HTTP_FLAG_PATH_REGULAR) \|\|
114	23	((stream->http_flags & NGHTTP2_HTTP_FLAG_METH_OPTIONS) &&
115	0	(stream->http_flags & NGHTTP2_HTTP_FLAG_PATH_ASTERISK)));
116	2.45k	}
117
118	5.27k	static int check_scheme(const uint8_t *value, size_t len) {
119	5.27k	const uint8_t *last;
120	5.27k	if (len == 0) {
121	48	return 0;
122	48	}
123
124	5.23k	if (!(('A' <= value && value <= 'Z') \|\| ('a' <= value && value <= 'z'))) {
125	153	return 0;
126	153	}
127
128	5.07k	last = value + len;
129	5.07k	++value;
130
131	26.3k	for (; value != last; ++value) {
132	21.4k	if (!(('A' <= value && value <= 'Z') \|\|
133	20.7k	('a' <= value && value <= 'z') \|\|
134	5.01k	('0' <= value && value <= '9') \|\| value == '+' \|\| value == '-' \|\|
135	207	*value == '.')) {
136	133	return 0;
137	133	}
138	21.4k	}
139	4.94k	return 1;
140	5.07k	}
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	3.49k	static int check_authority(const uint8_t *value, size_t len) {
169	3.49k	const uint8_t *last;
170	21.2k	for (last = value + len; value != last; ++value) {
171	18.1k	if (!VALID_AUTHORITY_CHARS[*value]) {
172	360	return 0;
173	360	}
174	18.1k	}
175	3.13k	return 1;
176	3.49k	}
177
178		static int check_header_value(const nghttp2_stream *stream,
179	24.6k	const nghttp2_rcbuf *value) {
180	24.6k	if (stream->flags &
181	24.6k	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	24.6k	return nghttp2_check_header_value_rfc9113(value->base, value->len);
186	24.6k	}
187
188		static int http_request_on_header(nghttp2_stream stream, nghttp2_hd_nv nv,
189	45.6k	int trailer, int connect_protocol) {
190	45.6k	nghttp2_extpri extpri;
191
192	45.6k	switch (nv->token) {
193	2.55k	case NGHTTP2_TOKEN__AUTHORITY:
194	2.55k	if (!check_authority(nv->value->base, nv->value->len) \|\|
195	2.43k	!check_pseudo_header(stream, nv, NGHTTP2_HTTP_FLAG__AUTHORITY)) {
196	263	return NGHTTP2_ERR_HTTP_HEADER;
197	263	}
198	2.29k	break;
199	4.80k	case NGHTTP2_TOKEN__METHOD:
200	4.80k	if (!nghttp2_check_method(nv->value->base, nv->value->len) \|\|
201	4.65k	!check_pseudo_header(stream, nv, NGHTTP2_HTTP_FLAG__METHOD)) {
202	217	return NGHTTP2_ERR_HTTP_HEADER;
203	217	}
204	4.58k	switch (nv->value->len) {
205	2.44k	case 4:
206	2.44k	if (lstreq("HEAD", nv->value->base, nv->value->len)) {
207	18	stream->http_flags \|= NGHTTP2_HTTP_FLAG_METH_HEAD;
208	18	}
209	2.44k	break;
210	80	case 7:
211	80	switch (nv->value->base[6]) {
212	49	case 'T':
213	49	if (lstreq("CONNECT", nv->value->base, nv->value->len)) {
214	37	if (stream->stream_id % 2 == 0) {
215		/* we won't allow CONNECT for push */
216	0	return NGHTTP2_ERR_HTTP_HEADER;
217	0	}
218	37	stream->http_flags \|= NGHTTP2_HTTP_FLAG_METH_CONNECT;
219	37	}
220	49	break;
221	49	case 'S':
222	21	if (lstreq("OPTIONS", nv->value->base, nv->value->len)) {
223	10	stream->http_flags \|= NGHTTP2_HTTP_FLAG_METH_OPTIONS;
224	10	}
225	21	break;
226	80	}
227	80	break;
228	4.58k	}
229	4.58k	break;
230	4.64k	case NGHTTP2_TOKEN__PATH:
231	4.64k	if (!nghttp2_check_path(nv->value->base, nv->value->len) \|\|
232	4.60k	!check_pseudo_header(stream, nv, NGHTTP2_HTTP_FLAG__PATH)) {
233	175	return NGHTTP2_ERR_HTTP_HEADER;
234	175	}
235	4.46k	if (nv->value->base[0] == '/') {
236	4.17k	stream->http_flags \|= NGHTTP2_HTTP_FLAG_PATH_REGULAR;
237	4.17k	} else if (nv->value->len == 1 && nv->value->base[0] == '*') {
238	21	stream->http_flags \|= NGHTTP2_HTTP_FLAG_PATH_ASTERISK;
239	21	}
240	4.46k	break;
241	5.27k	case NGHTTP2_TOKEN__SCHEME:
242	5.27k	if (!check_scheme(nv->value->base, nv->value->len) \|\|
243	4.94k	!check_pseudo_header(stream, nv, NGHTTP2_HTTP_FLAG__SCHEME)) {
244	460	return NGHTTP2_ERR_HTTP_HEADER;
245	460	}
246	4.81k	if ((nv->value->len == 4 && memieq("http", nv->value->base, 4)) \|\|
247	4.32k	(nv->value->len == 5 && memieq("https", nv->value->base, 5))) {
248	4.32k	stream->http_flags \|= NGHTTP2_HTTP_FLAG_SCHEME_HTTP;
249	4.32k	}
250	4.81k	break;
251	9	case NGHTTP2_TOKEN__PROTOCOL:
252	9	if (!connect_protocol \|\|
253	9	!check_pseudo_header(stream, nv, NGHTTP2_HTTP_FLAG__PROTOCOL)) {
254	9	return NGHTTP2_ERR_HTTP_HEADER;
255	9	}
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	936	case NGHTTP2_TOKEN_HOST:
271	936	if (!check_authority(nv->value->base, nv->value->len)) {
272	243	return NGHTTP2_ERR_IGN_HTTP_HEADER;
273	243	}
274	693	if (!check_pseudo_header(stream, nv, NGHTTP2_HTTP_FLAG_HOST)) {
275	71	return NGHTTP2_ERR_HTTP_HEADER;
276	71	}
277	622	break;
278	1.80k	case NGHTTP2_TOKEN_CONTENT_LENGTH: {
279	1.80k	if (stream->content_length != -1) {
280	96	return NGHTTP2_ERR_HTTP_HEADER;
281	96	}
282	1.71k	stream->content_length = parse_uint(nv->value->base, nv->value->len);
283	1.71k	if (stream->content_length == -1) {
284	490	return NGHTTP2_ERR_HTTP_HEADER;
285	490	}
286	1.22k	break;
287	1.71k	}
288		/* disallowed header fields */
289	1.22k	case NGHTTP2_TOKEN_CONNECTION:
290	80	case NGHTTP2_TOKEN_KEEP_ALIVE:
291	97	case NGHTTP2_TOKEN_PROXY_CONNECTION:
292	143	case NGHTTP2_TOKEN_TRANSFER_ENCODING:
293	167	case NGHTTP2_TOKEN_UPGRADE:
294	167	return NGHTTP2_ERR_HTTP_HEADER;
295	595	case NGHTTP2_TOKEN_TE:
296	595	if (!lstrieq("trailers", nv->value->base, nv->value->len)) {
297	401	return NGHTTP2_ERR_HTTP_HEADER;
298	401	}
299	194	break;
300	8.52k	case NGHTTP2_TOKEN_PRIORITY:
301	8.52k	if (!check_header_value(stream, nv->value)) {
302	328	stream->http_flags &= ~NGHTTP2_HTTP_FLAG_PRIORITY;
303	328	stream->http_flags \|= NGHTTP2_HTTP_FLAG_BAD_PRIORITY;
304
305	328	return NGHTTP2_ERR_IGN_HTTP_HEADER;
306	328	}
307
308	8.19k	if (!trailer &&
309		/* Do not parse the header field in PUSH_PROMISE. */
310	8.00k	(stream->stream_id & 1) &&
311	8.00k	!(stream->http_flags & NGHTTP2_HTTP_FLAG_BAD_PRIORITY)) {
312	7.79k	nghttp2_extpri_from_uint8(&extpri, stream->http_extpri);
313	7.79k	if (nghttp2_http_parse_priority(&extpri, nv->value->base,
314	7.79k	nv->value->len) == 0) {
315	5.54k	stream->http_extpri = nghttp2_extpri_to_uint8(&extpri);
316	5.54k	stream->http_flags \|= NGHTTP2_HTTP_FLAG_PRIORITY;
317	5.54k	} else {
318	2.25k	stream->http_flags &= ~NGHTTP2_HTTP_FLAG_PRIORITY;
319	2.25k	stream->http_flags \|= NGHTTP2_HTTP_FLAG_BAD_PRIORITY;
320	2.25k	}
321	7.79k	}
322	8.19k	break;
323	16.3k	default:
324	16.3k	if (nv->name->base[0] == ':') {
325	153	return NGHTTP2_ERR_HTTP_HEADER;
326	153	}
327
328	16.1k	if (!check_header_value(stream, nv->value)) {
329	911	return NGHTTP2_ERR_IGN_HTTP_HEADER;
330	911	}
331	45.6k	}
332
333	41.6k	return 0;
334	45.6k	}
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	52.9k	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	52.9k	if (nv->name->len == 0) {
416	3.59k	stream->http_flags \|= NGHTTP2_HTTP_FLAG_PSEUDO_HEADER_DISALLOWED;
417	3.59k	return NGHTTP2_ERR_IGN_HTTP_HEADER;
418	3.59k	}
419
420	49.4k	if (nv->name->base[0] == ':') {
421		/* pseudo header must have a valid token. */
422	17.9k	if (nv->token == -1 \|\| trailer \|\|
423	17.7k	(stream->http_flags & NGHTTP2_HTTP_FLAG_PSEUDO_HEADER_DISALLOWED)) {
424	460	return NGHTTP2_ERR_HTTP_HEADER;
425	460	}
426	31.4k	} else {
427	31.4k	stream->http_flags \|= NGHTTP2_HTTP_FLAG_PSEUDO_HEADER_DISALLOWED;
428
429	31.4k	switch (nghttp2_check_nonempty_header_name(nv->name->base, nv->name->len)) {
430	3.03k	case 0:
431	3.03k	return NGHTTP2_ERR_IGN_HTTP_HEADER;
432	261	case 2:
433		/* header field name must be lower-cased without exception */
434	261	return NGHTTP2_ERR_HTTP_HEADER;
435	31.4k	}
436	31.4k	}
437
438	49.4k	assert(nv->name->len > 0);
439
440	45.6k	if (session->server \|\| frame->hd.type == NGHTTP2_PUSH_PROMISE) {
441	45.6k	return http_request_on_header(stream, nv, trailer,
442	45.6k	session->server &&
443	45.6k	session->pending_enable_connect_protocol);
444	45.6k	}
445
446	0	return http_response_on_header(stream, nv);
447	45.6k	}
448
449		int nghttp2_http_on_request_headers(nghttp2_stream *stream,
450	4.99k	nghttp2_frame *frame) {
451	4.99k	if (!(stream->http_flags & NGHTTP2_HTTP_FLAG__PROTOCOL) &&
452	4.99k	(stream->http_flags & NGHTTP2_HTTP_FLAG_METH_CONNECT)) {
453	34	if ((stream->http_flags &
454	34	(NGHTTP2_HTTP_FLAG__SCHEME \| NGHTTP2_HTTP_FLAG__PATH)) \|\|
455	23	(stream->http_flags & NGHTTP2_HTTP_FLAG__AUTHORITY) == 0) {
456	23	return -1;
457	23	}
458	11	stream->content_length = -1;
459	4.96k	} else {
460	4.96k	if ((stream->http_flags & NGHTTP2_HTTP_FLAG_REQ_HEADERS) !=
461	4.96k	NGHTTP2_HTTP_FLAG_REQ_HEADERS \|\|
462	2.91k	(stream->http_flags &
463	2.91k	(NGHTTP2_HTTP_FLAG__AUTHORITY \| NGHTTP2_HTTP_FLAG_HOST)) == 0) {
464	2.51k	return -1;
465	2.51k	}
466	2.45k	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	2.45k	if (!check_path(stream)) {
472	23	return -1;
473	23	}
474	2.45k	}
475
476	2.43k	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	2.43k	return 0;
484	4.99k	}
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	28	nghttp2_frame *frame) {
515	28	(void)stream;
516
517	28	if ((frame->hd.flags & NGHTTP2_FLAG_END_STREAM) == 0) {
518	9	return -1;
519	9	}
520
521	19	return 0;
522	28	}
523
524	963	int nghttp2_http_on_remote_end_stream(nghttp2_stream *stream) {
525	963	if (stream->http_flags & NGHTTP2_HTTP_FLAG_EXPECT_FINAL_RESPONSE) {
526	0	return -1;
527	0	}
528
529	963	if (stream->content_length != -1 &&
530	139	stream->content_length != stream->recv_content_length) {
531	129	return -1;
532	129	}
533
534	834	return 0;
535	963	}
536
537	301	int nghttp2_http_on_data_chunk(nghttp2_stream *stream, size_t n) {
538	301	stream->recv_content_length += (int64_t)n;
539
540	301	if ((stream->http_flags & NGHTTP2_HTTP_FLAG_EXPECT_FINAL_RESPONSE) \|\|
541	301	(stream->content_length != -1 &&
542	159	stream->recv_content_length > stream->content_length)) {
543	19	return -1;
544	19	}
545
546	282	return 0;
547	301	}
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	7.79k	size_t valuelen) {
589	7.79k	nghttp2_extpri pri = *dest;
590	7.79k	sfparse_parser sfp;
591	7.79k	sfparse_vec key;
592	7.79k	sfparse_value val;
593	7.79k	int rv;
594
595	7.79k	sfparse_parser_init(&sfp, value, valuelen);
596
597	17.1k	for (;;) {
598	17.1k	rv = sfparse_parser_dict(&sfp, &key, &val);
599	17.1k	if (rv != 0) {
600	7.60k	if (rv == SFPARSE_ERR_EOF) {
601	5.54k	break;
602	5.54k	}
603
604	2.05k	return NGHTTP2_ERR_INVALID_ARGUMENT;
605	7.60k	}
606
607	9.50k	if (key.len != 1) {
608	3.04k	continue;
609	3.04k	}
610
611	6.46k	switch (key.base[0]) {
612	677	case 'i':
613	677	if (val.type != SFPARSE_TYPE_BOOLEAN) {
614	34	return NGHTTP2_ERR_INVALID_ARGUMENT;
615	34	}
616
617	643	pri.inc = val.boolean;
618
619	643	break;
620	500	case 'u':
621	500	if (val.type != SFPARSE_TYPE_INTEGER \|\|
622	453	val.integer < NGHTTP2_EXTPRI_URGENCY_HIGH \|\|
623	377	NGHTTP2_EXTPRI_URGENCY_LOW < val.integer) {
624	161	return NGHTTP2_ERR_INVALID_ARGUMENT;
625	161	}
626
627	339	pri.urgency = (uint32_t)val.integer;
628
629	339	break;
630	6.46k	}
631	6.46k	}
632
633	5.54k	*dest = pri;
634
635	5.54k	return 0;
636	7.79k	}