nghttp2/src/asio_common.cc

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/*
* 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 "asio_common.h"
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#include <fcntl.h>
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#include <memory>
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#include "util.h"
#include "template.h"
#include "http2.h"
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namespace nghttp2 {
namespace asio_http2 {
class nghttp2_category_impl : public boost::system::error_category {
public:
const char *name() const noexcept { return "nghttp2"; }
std::string message(int ev) const { return nghttp2_strerror(ev); }
};
const boost::system::error_category &nghttp2_category() noexcept {
static nghttp2_category_impl cat;
return cat;
}
boost::system::error_code make_error_code(nghttp2_error ev) {
return boost::system::error_code(static_cast<int>(ev), nghttp2_category());
}
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class nghttp2_asio_category_impl : public boost::system::error_category {
public:
const char *name() const noexcept { return "nghttp2_asio"; }
std::string message(int ev) const {
switch (ev) {
case NGHTTP2_ASIO_ERR_NO_ERROR:
return "no error";
case NGHTTP2_ASIO_ERR_TLS_NO_APP_PROTO_NEGOTIATED:
return "tls: no application protocol negotiated";
default:
return "unknown";
}
}
};
const boost::system::error_category &nghttp2_asio_category() noexcept {
static nghttp2_asio_category_impl cat;
return cat;
}
boost::system::error_code make_error_code(nghttp2_asio_error ev) {
return boost::system::error_code(static_cast<int>(ev),
nghttp2_asio_category());
}
generator_cb string_generator(std::string data) {
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auto strio = std::make_shared<std::pair<std::string, size_t>>(std::move(data),
data.size());
return [strio](uint8_t *buf, size_t len, uint32_t *data_flags) {
auto &data = strio->first;
auto &left = strio->second;
auto n = std::min(len, left);
std::copy_n(data.c_str() + data.size() - left, n, buf);
left -= n;
if (left == 0) {
*data_flags |= NGHTTP2_DATA_FLAG_EOF;
}
return n;
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};
}
generator_cb deferred_generator() {
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return [](uint8_t *buf, size_t len, uint32_t *data_flags) {
return NGHTTP2_ERR_DEFERRED;
};
}
template <typename F, typename... T>
std::shared_ptr<Defer<F, T...>> defer_shared(F &&f, T &&... t) {
return std::make_shared<Defer<F, T...>>(std::forward<F>(f),
std::forward<T>(t)...);
}
generator_cb file_generator(const std::string &path) {
auto fd = open(path.c_str(), O_RDONLY);
if (fd == -1) {
return generator_cb();
}
return file_generator_from_fd(fd);
}
generator_cb file_generator_from_fd(int fd) {
auto d = defer_shared(close, fd);
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return [fd, d](uint8_t *buf, size_t len,
uint32_t *data_flags) -> generator_cb::result_type {
ssize_t n;
while ((n = read(fd, buf, len)) == -1 && errno == EINTR)
;
if (n == -1) {
return NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE;
}
if (n == 0) {
*data_flags |= NGHTTP2_DATA_FLAG_EOF;
}
return n;
};
}
bool check_path(const std::string &path) { return util::check_path(path); }
std::string percent_decode(const std::string &s) {
return util::percent_decode(std::begin(s), std::end(s));
}
std::string http_date(int64_t t) { return util::http_date(t); }
boost::system::error_code host_service_from_uri(boost::system::error_code &ec,
std::string &scheme,
std::string &host,
std::string &service,
const std::string &uri) {
ec.clear();
http_parser_url u{};
if (http_parser_parse_url(uri.c_str(), uri.size(), 0, &u) != 0) {
ec = make_error_code(boost::system::errc::invalid_argument);
return ec;
}
if ((u.field_set & (1 << UF_SCHEMA)) == 0 ||
(u.field_set & (1 << UF_HOST)) == 0) {
ec = make_error_code(boost::system::errc::invalid_argument);
return ec;
}
http2::copy_url_component(scheme, &u, UF_SCHEMA, uri.c_str());
http2::copy_url_component(host, &u, UF_HOST, uri.c_str());
if (u.field_set & (1 << UF_PORT)) {
http2::copy_url_component(service, &u, UF_PORT, uri.c_str());
} else {
service = scheme;
}
return ec;
}
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bool tls_h2_negotiated(ssl_socket &socket) {
auto ssl = socket.native_handle();
const unsigned char *next_proto = nullptr;
unsigned int next_proto_len = 0;
#ifndef OPENSSL_NO_NEXTPROTONEG
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SSL_get0_next_proto_negotiated(ssl, &next_proto, &next_proto_len);
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#endif // !OPENSSL_NO_NEXTPROTONEG
#if OPENSSL_VERSION_NUMBER >= 0x10002000L
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if (next_proto == nullptr) {
SSL_get0_alpn_selected(ssl, &next_proto, &next_proto_len);
}
#endif // OPENSSL_VERSION_NUMBER >= 0x10002000L
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if (next_proto == nullptr) {
return false;
}
return util::check_h2_is_selected(StringRef{next_proto, next_proto_len});
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}
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} // namespace asio_http2
} // namespace nghttp2