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websocket.cpp
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websocket.cpp
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#include "polyweb.hpp"
#include <string.h>
#include <utility>
#ifdef POLYWEB_SIMD
#include <x86intrin.h>
#endif
namespace pw {
std::vector<char> WSMessage::build(const char* masking_key) const {
std::vector<char> ret(2);
PW_SET_WS_FRAME_FIN(ret);
PW_CLEAR_WS_FRAME_RSV1(ret);
PW_CLEAR_WS_FRAME_RSV2(ret);
PW_CLEAR_WS_FRAME_RSV3(ret);
PW_SET_WS_FRAME_OPCODE(ret, opcode);
if (data.size() < 126) {
PW_SET_WS_FRAME_PAYLOAD_LENGTH(ret, data.size());
} else if (data.size() <= UINT16_MAX) {
PW_SET_WS_FRAME_PAYLOAD_LENGTH(ret, 126);
ret.resize(4);
uint16_t size_16 = data.size();
#if BYTE_ORDER == BIG_ENDIAN
memcpy(ret.data() + 2, &size_16, 2);
#else
reverse_memcpy(ret.data() + 2, &size_16, 2);
#endif
} else {
PW_SET_WS_FRAME_PAYLOAD_LENGTH(ret, 127);
ret.resize(10);
uint64_t size_64 = data.size();
#if BYTE_ORDER == BIG_ENDIAN
memcpy(ret.data() + 2, &size_64, 8);
#else
reverse_memcpy(ret.data() + 2, &size_64, 8);
#endif
}
if (masking_key) {
PW_SET_WS_FRAME_MASKED(ret);
size_t end = ret.size();
ret.resize(end + 4 + data.size());
memcpy(&ret[end], masking_key, 4);
size_t i = 0;
#ifdef POLYWEB_SIMD
int32_t masking_key_integer;
memcpy(&masking_key_integer, masking_key, 4);
for (__m256i mask_vec = _mm256_set1_epi32(masking_key_integer); i + 32 <= data.size(); i += 32) {
__m256i src_vec = _mm256_loadu_si256((const __m256i_u*) &data[i]);
__m256i masked_vec = _mm256_xor_si256(src_vec, mask_vec);
_mm256_storeu_si256((__m256i_u*) &ret[end + 4 + i], masked_vec);
}
for (__m128i mask_vec = _mm_set1_epi32(masking_key_integer); i + 16 <= data.size(); i += 16) {
__m128i src_vec = _mm_loadu_si128((const __m128i_u*) &data[i]);
__m128i masked_vec = _mm_xor_si128(src_vec, mask_vec);
_mm_storeu_si128((__m128i_u*) &ret[end + 4 + i], masked_vec);
}
#endif
for (; i < data.size(); ++i) {
ret[end + 4 + i] = data[i] ^ masking_key[i % 4];
}
} else {
PW_CLEAR_WS_FRAME_MASKED(ret);
ret.insert(ret.end(), data.begin(), data.end());
}
return ret;
}
int WSMessage::parse(pn::tcp::Connection& conn, pn::tcp::BufReceiver& buf_receiver, long frame_rlimit, long message_rlimit) {
for (bool fin = false; !fin;) {
char frame_header[2];
{
long result;
if ((result = buf_receiver.recvall(conn, frame_header, 2)) == PN_ERROR) {
detail::set_last_error(PW_ENET);
return PN_ERROR;
} else if (result != 2) {
detail::set_last_error(PW_EWEB);
return PN_ERROR;
}
}
fin = PW_GET_WS_FRAME_FIN(frame_header);
if (PW_GET_WS_FRAME_OPCODE(frame_header) != 0) opcode = PW_GET_WS_FRAME_OPCODE(frame_header);
bool masked = PW_GET_WS_FRAME_MASKED(frame_header);
unsigned long long payload_length;
uint8_t payload_length_7 = PW_GET_WS_FRAME_PAYLOAD_LENGTH(frame_header);
if (payload_length_7 == 126) {
uint16_t payload_length_16;
long result;
if ((result = buf_receiver.recvall(conn, &payload_length_16, 2)) == PN_ERROR) {
detail::set_last_error(PW_ENET);
return PN_ERROR;
} else if (result != 2) {
detail::set_last_error(PW_EWEB);
return PN_ERROR;
}
payload_length = ntohs(payload_length_16);
} else if (payload_length_7 == 127) {
uint64_t payload_length_64;
long result;
if ((result = buf_receiver.recvall(conn, &payload_length_64, 8)) == PN_ERROR) {
detail::set_last_error(PW_ENET);
return PN_ERROR;
} else if (result != 8) {
detail::set_last_error(PW_EWEB);
return PN_ERROR;
}
payload_length = ntohll(payload_length_64);
} else {
payload_length = payload_length_7;
}
char masking_key[4];
if (masked) {
long result;
if ((result = buf_receiver.recvall(conn, &masking_key, 4)) == PN_ERROR) {
detail::set_last_error(PW_ENET);
return PN_ERROR;
} else if (result != 4) {
detail::set_last_error(PW_EWEB);
return PN_ERROR;
}
}
if (payload_length) {
size_t end = data.size();
if (payload_length > (unsigned long long) frame_rlimit || end + payload_length > (unsigned long long) message_rlimit) {
detail::set_last_error(PW_EWEB);
return PN_ERROR;
} else {
data.resize(end + payload_length);
long result;
if ((result = buf_receiver.recvall(conn, &data[end], payload_length)) == PN_ERROR) {
detail::set_last_error(PW_ENET);
return PN_ERROR;
} else if ((unsigned long long) result != payload_length) {
detail::set_last_error(PW_EWEB);
data.resize(end + result);
return PN_ERROR;
}
}
if (masked) {
size_t i = 0;
#ifdef POLYWEB_SIMD
int32_t masking_key_integer;
memcpy(&masking_key_integer, masking_key, 4);
for (__m256i mask_vec = _mm256_set1_epi32(masking_key_integer); i + 32 <= payload_length; i += 32) {
__m256i src_vec = _mm256_loadu_si256((const __m256i_u*) &data[end + i]);
__m256i masked_vec = _mm256_xor_si256(src_vec, mask_vec);
_mm256_storeu_si256((__m256i_u*) &data[end + i], masked_vec);
}
for (__m128i mask_vec = _mm_set1_epi32(masking_key_integer); i + 16 <= payload_length; i += 16) {
__m128i src_vec = _mm_loadu_si128((const __m128i_u*) &data[end + i]);
__m128i masked_vec = _mm_xor_si128(src_vec, mask_vec);
_mm_storeu_si128((__m128i_u*) &data[end + i], masked_vec);
}
#endif
for (; i < payload_length; ++i) {
data[end + i] ^= masking_key[i % 4];
}
}
}
}
return PN_OK;
}
template <typename Base>
int BasicConnection<Base>::ws_close(uint16_t status_code, pn::StringView reason, const char* masking_key) {
if (!this->is_valid()) {
ws_closed = true;
return PN_OK;
}
WSMessage message(8);
message.data.resize(2 + reason.size());
#if BYTE_ORDER == BIG_ENDIAN
memcpy(message.data.data(), &status_code, 2);
#else
reverse_memcpy(message.data.data(), &status_code, 2);
#endif
memcpy(message.data.data() + 2, reason.data(), reason.size());
if (send(message, masking_key) == PN_ERROR) {
return PN_ERROR;
}
ws_closed = true;
return PN_OK;
}
template <typename Base>
int BasicServer<Base>::handle_ws_connection(pn::UniqueSocket<connection_type> conn, pn::tcp::BufReceiver& buf_receiver, const ws_route_type& route) const {
route.on_open(*conn, route.data);
for (;;) {
if (!conn) {
route.on_close(*conn, 0, {}, false, route.data);
break;
}
WSMessage message;
if (message.parse(*conn, buf_receiver, ws_frame_rlimit, ws_message_rlimit) == PN_ERROR) {
route.on_close(*conn, 0, {}, false, route.data);
return PN_ERROR;
}
switch (message.opcode) {
case 0x1:
case 0x2:
case 0xA:
route.on_message(*conn, std::move(message), route.data);
break;
case 0x8:
if (conn->ws_closed) {
route.on_close(*conn, 0, {}, true, route.data);
if (conn->close() == PN_ERROR) {
detail::set_last_error(PW_ENET);
return PN_ERROR;
}
} else {
uint16_t status_code = 0;
std::string reason;
if (message.data.size() >= 2) {
#if BYTE_ORDER__ == BIG_ENDIAN
memcpy(&status_code, message.data.data(), 2);
#else
reverse_memcpy(&status_code, message.data.data(), 2);
#endif
}
if (message.data.size() > 2) {
reason.assign(message.data.begin() + 2, message.data.end());
}
route.on_close(*conn, status_code, reason, true, route.data);
if (conn->send(WSMessage(std::move(message.data), 0x8)) == PN_ERROR) {
return PN_ERROR;
}
if (conn->close() == PN_ERROR) {
detail::set_last_error(PW_ENET);
return PN_ERROR;
}
}
return PN_OK;
case 0x9:
if (conn->send(WSMessage(std::move(message.data), 0xA)) == PN_ERROR) {
route.on_close(*conn, 0, {}, false, route.data);
return PN_ERROR;
}
break;
}
}
return PN_OK;
}
template <>
WebSocketClient& WebSocketClient::operator=(const pn::tcp::Client& conn) {
if (this != &conn) {
fd = conn.fd;
addr = conn.addr;
addrlen = conn.addrlen;
}
return *this;
}
template <>
SecureWebSocketClient& SecureWebSocketClient::operator=(const pn::tcp::SecureClient& conn) {
if (this != &conn) {
fd = conn.fd;
addr = conn.addr;
addrlen = conn.addrlen;
ssl = conn.ssl;
}
return *this;
}
template <typename Base>
int BasicWebSocketClient<Base>::ws_connect(pn::StringView hostname, unsigned short port, pn::StringView target, HTTPResponse& resp, const QueryParameters& query_parameters, const HTTPHeaders& headers, unsigned int header_climit, long header_name_rlimit, long header_value_rlimit, long body_chunk_rlimit, long body_rlimit, long misc_rlimit) {
HTTPRequest req("GET", target, query_parameters, headers);
if (!req.headers.count("User-Agent")) {
req.headers["User-Agent"] = PW_SERVER_CLIENT_NAME;
}
if (!req.headers.count("Host")) {
unsigned short default_port[2] = {80, 443};
if (port == default_port[this->is_secure()]) {
req.headers["Host"] = hostname;
} else {
req.headers["Host"] = std::string(hostname) + ':' + std::to_string(port);
}
}
if (!req.headers.count("Connection")) {
req.headers["Connection"] = "upgrade";
}
if (!req.headers.count("Upgrade")) {
req.headers["Upgrade"] = "websocket";
}
if (!req.headers.count("Sec-WebSocket-Version")) {
req.headers["Sec-WebSocket-Version"] = PW_WS_VERSION;
}
if (!req.headers.count("Sec-WebSocket-Key")) {
req.headers["Sec-WebSocket-Key"] = PW_WS_KEY;
}
if (send(req) == PN_ERROR) {
return PN_ERROR;
}
if (resp.parse(*this, buf_receiver, header_climit, header_name_rlimit, header_value_rlimit, body_chunk_rlimit, body_rlimit, misc_rlimit) == PN_ERROR) {
return PN_ERROR;
}
if (resp.status_code != 101) {
detail::set_last_error(PW_EWEB);
return PN_ERROR;
}
return PN_OK;
}
template <typename Base>
int BasicWebSocketClient<Base>::ws_connect(pn::StringView hostname, unsigned short port, pn::StringView target, const QueryParameters& query_parameters, const HTTPHeaders& headers, unsigned int header_climit, long header_name_rlimit, long header_value_rlimit, long body_chunk_rlimit, long body_rlimit, long misc_rlimit) {
HTTPResponse resp;
return ws_connect(hostname, port, target, resp, query_parameters, headers, header_climit, header_name_rlimit, header_value_rlimit, body_chunk_rlimit, body_rlimit, misc_rlimit);
}
template <typename Base>
int BasicWebSocketClient<Base>::ws_connect(pn::StringView url, HTTPResponse& resp, HTTPHeaders headers, unsigned int header_climit, long header_name_rlimit, long header_value_rlimit, long body_chunk_rlimit, long body_rlimit, long misc_rlimit) {
URLInfo url_info;
if (url_info.parse(url) == PN_ERROR) {
return PN_ERROR;
}
if (!url_info.credentials.empty() && !headers.count("WWW-Authenticate")) {
headers["WWW-Authenticate"] = "basic " + base64_encode(url_info.credentials.data(), url_info.credentials.size());
}
return ws_connect(url_info.hostname(), url_info.port(), url_info.path, resp, url_info.query_parameters, headers, header_climit, header_name_rlimit, header_value_rlimit, body_chunk_rlimit, body_rlimit, misc_rlimit);
}
template <typename Base>
int BasicWebSocketClient<Base>::ws_connect(pn::StringView url, HTTPHeaders headers, unsigned int header_climit, long header_name_rlimit, long header_value_rlimit, long body_chunk_rlimit, long body_rlimit, long misc_rlimit) {
HTTPResponse resp;
return ws_connect(url, resp, headers, header_climit, header_name_rlimit, header_value_rlimit, body_chunk_rlimit, body_rlimit, misc_rlimit);
}
template <typename Base>
int BasicWebSocketClient<Base>::recv(WSMessage& message, bool handle_pings, long frame_rlimit, long message_rlimit) {
for (int i = 0;;) {
if (message.parse(*this, buf_receiver, frame_rlimit, message_rlimit) == PN_ERROR) {
return this->ws_closed ? i : PN_ERROR;
}
if (message.opcode == 0x8) {
if (on_close) {
if (this->ws_closed) {
on_close(*this, 0, {}, true, this->data);
} else {
uint16_t status_code = 0;
std::string reason;
if (message.data.size() >= 2) {
#if BYTE_ORDER__ == BIG_ENDIAN
memcpy(&status_code, message.data.data(), 2);
#else
reverse_memcpy(&status_code, message.data.data(), 2);
#endif
}
if (message.data.size() > 2) {
reason.assign(message.data.begin() + 2, message.data.end());
}
on_close(*this, status_code, reason, true, this->data);
if (send(WSMessage(std::move(message.data), 0x8)) == PN_ERROR) {
return PN_ERROR;
}
}
}
return i;
} else if (handle_pings && message.opcode == 0x9) {
if (send(WSMessage(std::move(message.data), 0xA)) == PN_ERROR) {
return this->ws_closed ? i : PN_ERROR;
}
continue;
}
return ++i;
}
}
int make_websocket_client(SecureWebSocketClient& client, pn::StringView hostname, unsigned short port, bool secure, pn::StringView target, HTTPResponse& resp, const QueryParameters& query_parameters, const HTTPHeaders& headers, const ClientConfig& config) {
if (client.connect(hostname, port) == PN_ERROR) {
detail::set_last_error(PW_ENET);
return PN_ERROR;
}
if (config.configure_sockopts(client) == PN_ERROR) {
return PN_ERROR;
}
if (secure) {
if (config.configure_ssl(client, hostname) == PN_ERROR) {
return PN_ERROR;
}
if (client.ssl_connect() == PN_ERROR) {
detail::set_last_error(PW_ENET);
return PN_ERROR;
}
}
if (client.ws_connect(hostname, port, target, resp, query_parameters, headers, config.header_climit, config.header_name_rlimit, config.header_value_rlimit, config.body_chunk_rlimit, config.body_rlimit, config.misc_rlimit) == PN_ERROR) {
return PN_ERROR;
}
return PN_OK;
}
int make_websocket_client(SecureWebSocketClient& client, pn::StringView hostname, unsigned short port, bool secure, pn::StringView target, const QueryParameters& query_parameters, const HTTPHeaders& headers, const ClientConfig& config) {
HTTPResponse resp;
return make_websocket_client(client, hostname, port, secure, target, resp, query_parameters, headers, config);
}
int make_websocket_client(SecureWebSocketClient& client, pn::StringView url, HTTPResponse& resp, HTTPHeaders headers, const ClientConfig& config) {
URLInfo url_info;
if (url_info.parse(url) == PN_ERROR) {
return PN_ERROR;
}
if (!url_info.credentials.empty() && !headers.count("WWW-Authenticate")) {
headers["WWW-Authenticate"] = "basic " + base64_encode(url_info.credentials.data(), url_info.credentials.size());
}
return make_websocket_client(client, url_info.hostname(), url_info.port(), url_info.scheme == "wss", url_info.path, resp, url_info.query_parameters, headers, config);
}
int make_websocket_client(SecureWebSocketClient& client, pn::StringView url, HTTPHeaders headers, const ClientConfig& config) {
HTTPResponse resp;
return make_websocket_client(client, url, resp, headers, config);
}
int make_proxied_websocket_client(SecureWebSocketClient& client, pn::StringView hostname, unsigned short port, bool secure, pn::StringView target, pn::StringView proxy_url, HTTPResponse& resp, const QueryParameters& query_parameters, const HTTPHeaders& headers, const ClientConfig& config) {
URLInfo proxy_url_info;
if (proxy_url_info.parse(proxy_url) == PN_ERROR) {
return PN_ERROR;
}
if (proxy_url_info.scheme != "http") {
detail::set_last_error(PW_EWEB);
return PN_ERROR;
}
HTTPRequest connect_req("CONNECT",
std::string(hostname) + ':' + std::to_string(port),
{
{"Host", std::string(hostname) + ':' + std::to_string(port)},
{"Connection", "close"},
});
if (!proxy_url_info.credentials.empty() && !connect_req.headers.count("Proxy-Authorization")) {
connect_req.headers["Proxy-Authorization"] = "basic " + base64_encode(proxy_url_info.credentials.data(), proxy_url_info.credentials.size());
}
client.buf_receiver.size = 0;
if (client.connect(proxy_url_info.hostname(), proxy_url_info.port()) == PN_ERROR) {
detail::set_last_error(PW_ENET);
return PN_ERROR;
}
if (config.configure_sockopts(client) == PN_ERROR) {
return PN_ERROR;
}
if (client.send(connect_req) == PN_ERROR) {
return PN_ERROR;
}
HTTPResponse connect_resp;
if (connect_resp.parse(client, client.buf_receiver, false, config.header_climit, config.header_name_rlimit, config.header_value_rlimit, config.body_chunk_rlimit, config.body_rlimit, config.misc_rlimit) == PN_ERROR) {
return PN_ERROR;
} else if (connect_resp.status_code_category() != 200) {
detail::set_last_error(PW_EWEB);
return PN_ERROR;
}
client.buf_receiver.size = config.recv_buf_size;
if (secure) {
if (config.configure_ssl(client, hostname) == PN_ERROR) {
return PN_ERROR;
}
if (client.ssl_connect() == PN_ERROR) {
detail::set_last_error(PW_ENET);
return PN_ERROR;
}
}
if (client.ws_connect(hostname, port, target, resp, query_parameters, headers, config.header_climit, config.header_name_rlimit, config.header_value_rlimit, config.body_chunk_rlimit, config.body_rlimit, config.misc_rlimit) == PN_ERROR) {
return PN_ERROR;
}
return PN_OK;
}
int make_proxied_websocket_client(SecureWebSocketClient& client, pn::StringView hostname, unsigned short port, bool secure, pn::StringView target, pn::StringView proxy_url, const QueryParameters& query_parameters, const HTTPHeaders& headers, const ClientConfig& config) {
HTTPResponse resp;
return make_proxied_websocket_client(client, hostname, port, secure, target, proxy_url, resp, query_parameters, headers, config);
}
int make_proxied_websocket_client(SecureWebSocketClient& client, pn::StringView url, pn::StringView proxy_url, HTTPResponse& resp, HTTPHeaders headers, const ClientConfig& config) {
URLInfo url_info;
if (url_info.parse(url) == PN_ERROR) {
return PN_ERROR;
}
if (!url_info.credentials.empty() && !headers.count("WWW-Authenticate")) {
headers["WWW-Authenticate"] = "basic " + base64_encode(url_info.credentials.data(), url_info.credentials.size());
}
return make_proxied_websocket_client(client, url_info.hostname(), url_info.port(), url_info.scheme == "wss", url_info.path, proxy_url, resp, url_info.query_parameters, headers, config);
}
int make_proxied_websocket_client(SecureWebSocketClient& client, pn::StringView url, pn::StringView proxy_url, HTTPHeaders headers, const ClientConfig& config) {
HTTPResponse resp;
return make_proxied_websocket_client(client, url, proxy_url, resp, headers, config);
}
template class BasicConnection<pn::tcp::Connection>;
template class BasicConnection<pn::tcp::SecureConnection>;
template class BasicConnection<pn::tcp::Client>;
template class BasicConnection<pn::tcp::SecureClient>;
template class BasicServer<pn::tcp::Server>;
template class BasicServer<pn::tcp::SecureServer>;
template class BasicWebSocketClient<pn::tcp::Client>;
template class BasicWebSocketClient<pn::tcp::SecureClient>;
} // namespace pw