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/*
* nghttp2 - HTTP/2 C Library
*
* Copyright (c) 2021 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 "http3.h"
namespace nghttp2 {
namespace http3 {
namespace {
nghttp3_nv make_nv_internal(const std::string &name, const std::string &value,
bool never_index, uint8_t nv_flags) {
uint8_t flags;
flags = nv_flags |
(never_index ? NGHTTP3_NV_FLAG_NEVER_INDEX : NGHTTP3_NV_FLAG_NONE);
return {(uint8_t *)name.c_str(), (uint8_t *)value.c_str(), name.size(),
value.size(), flags};
}
} // namespace
namespace {
nghttp3_nv make_nv_internal(const StringRef &name, const StringRef &value,
bool never_index, uint8_t nv_flags) {
uint8_t flags;
flags = nv_flags |
(never_index ? NGHTTP3_NV_FLAG_NEVER_INDEX : NGHTTP3_NV_FLAG_NONE);
return {(uint8_t *)name.c_str(), (uint8_t *)value.c_str(), name.size(),
value.size(), flags};
}
} // namespace
nghttp3_nv make_nv(const std::string &name, const std::string &value,
bool never_index) {
return make_nv_internal(name, value, never_index, NGHTTP3_NV_FLAG_NONE);
}
nghttp3_nv make_nv(const StringRef &name, const StringRef &value,
bool never_index) {
return make_nv_internal(name, value, never_index, NGHTTP3_NV_FLAG_NONE);
}
nghttp3_nv make_nv_nocopy(const std::string &name, const std::string &value,
bool never_index) {
return make_nv_internal(name, value, never_index,
NGHTTP3_NV_FLAG_NO_COPY_NAME |
NGHTTP3_NV_FLAG_NO_COPY_VALUE);
}
nghttp3_nv make_nv_nocopy(const StringRef &name, const StringRef &value,
bool never_index) {
return make_nv_internal(name, value, never_index,
NGHTTP3_NV_FLAG_NO_COPY_NAME |
NGHTTP3_NV_FLAG_NO_COPY_VALUE);
}
namespace {
void copy_headers_to_nva_internal(std::vector<nghttp3_nv> &nva,
const HeaderRefs &headers, uint8_t nv_flags,
uint32_t flags) {
auto it_forwarded = std::end(headers);
auto it_xff = std::end(headers);
auto it_xfp = std::end(headers);
auto it_via = std::end(headers);
for (auto it = std::begin(headers); it != std::end(headers); ++it) {
auto kv = &(*it);
if (kv->name.empty() || kv->name[0] == ':') {
continue;
}
switch (kv->token) {
case http2::HD_COOKIE:
case http2::HD_CONNECTION:
case http2::HD_HOST:
case http2::HD_HTTP2_SETTINGS:
case http2::HD_KEEP_ALIVE:
case http2::HD_PROXY_CONNECTION:
case http2::HD_SERVER:
case http2::HD_TE:
case http2::HD_TRANSFER_ENCODING:
case http2::HD_UPGRADE:
continue;
case http2::HD_EARLY_DATA:
if (flags & http2::HDOP_STRIP_EARLY_DATA) {
continue;
}
break;
case http2::HD_SEC_WEBSOCKET_ACCEPT:
if (flags & http2::HDOP_STRIP_SEC_WEBSOCKET_ACCEPT) {
continue;
}
break;
case http2::HD_SEC_WEBSOCKET_KEY:
if (flags & http2::HDOP_STRIP_SEC_WEBSOCKET_KEY) {
continue;
}
break;
case http2::HD_FORWARDED:
if (flags & http2::HDOP_STRIP_FORWARDED) {
continue;
}
if (it_forwarded == std::end(headers)) {
it_forwarded = it;
continue;
}
kv = &(*it_forwarded);
it_forwarded = it;
break;
case http2::HD_X_FORWARDED_FOR:
if (flags & http2::HDOP_STRIP_X_FORWARDED_FOR) {
continue;
}
if (it_xff == std::end(headers)) {
it_xff = it;
continue;
}
kv = &(*it_xff);
it_xff = it;
break;
case http2::HD_X_FORWARDED_PROTO:
if (flags & http2::HDOP_STRIP_X_FORWARDED_PROTO) {
continue;
}
if (it_xfp == std::end(headers)) {
it_xfp = it;
continue;
}
kv = &(*it_xfp);
it_xfp = it;
break;
case http2::HD_VIA:
if (flags & http2::HDOP_STRIP_VIA) {
continue;
}
if (it_via == std::end(headers)) {
it_via = it;
continue;
}
kv = &(*it_via);
it_via = it;
break;
}
nva.push_back(
make_nv_internal(kv->name, kv->value, kv->no_index, nv_flags));
}
}
} // namespace
void copy_headers_to_nva(std::vector<nghttp3_nv> &nva,
const HeaderRefs &headers, uint32_t flags) {
copy_headers_to_nva_internal(nva, headers, NGHTTP3_NV_FLAG_NONE, flags);
}
void copy_headers_to_nva_nocopy(std::vector<nghttp3_nv> &nva,
const HeaderRefs &headers, uint32_t flags) {
copy_headers_to_nva_internal(
nva, headers,
NGHTTP3_NV_FLAG_NO_COPY_NAME | NGHTTP3_NV_FLAG_NO_COPY_VALUE, flags);
}
int check_nv(const uint8_t *name, size_t namelen, const uint8_t *value,
size_t valuelen) {
if (!nghttp3_check_header_name(name, namelen)) {
return 0;
}
if (!nghttp3_check_header_value(value, valuelen)) {
return 0;
}
return 1;
}
} // namespace http3
} // namespace nghttp2
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