#include <utility>
#include <vector>
+#include "tlse.h"
+
+#include "acceptor.h"
#include "accesslog.h"
#include "log.h"
#include "metacube2.h"
// Process each client where we have socket activity.
for (int i = 0; i < nfds; ++i) {
- Client *client = reinterpret_cast<Client *>(events[i].data.u64);
+ Client *client = reinterpret_cast<Client *>(events[i].data.ptr);
if (events[i].events & (EPOLLERR | EPOLLRDHUP | EPOLLHUP)) {
close_client(client);
return serialized;
}
-void Server::add_client_deferred(int sock)
+void Server::add_client_deferred(int sock, Acceptor *acceptor)
{
MutexLock lock(&queued_clients_mutex);
- queued_add_clients.push_back(sock);
+ queued_add_clients.push_back(std::make_pair(sock, acceptor));
}
-void Server::add_client(int sock)
+void Server::add_client(int sock, Acceptor *acceptor)
{
+ const bool is_tls = acceptor->is_tls();
pair<map<int, Client>::iterator, bool> ret =
clients.insert(make_pair(sock, Client(sock)));
assert(ret.second == true); // Should not already exist.
// Start listening on data from this socket.
epoll_event ev;
- ev.events = EPOLLIN | EPOLLET | EPOLLRDHUP;
- ev.data.u64 = reinterpret_cast<uint64_t>(client_ptr);
+ if (is_tls) {
+ // Even in the initial state (READING_REQUEST), TLS needs to
+ // send data for the handshake, and thus might end up needing
+ // to know about EPOLLOUT.
+ ev.events = EPOLLIN | EPOLLOUT | EPOLLET | EPOLLRDHUP;
+ } else {
+ // EPOLLOUT will be added once we go out of READING_REQUEST.
+ ev.events = EPOLLIN | EPOLLET | EPOLLRDHUP;
+ }
+ ev.data.ptr = client_ptr;
if (epoll_ctl(epoll_fd, EPOLL_CTL_ADD, sock, &ev) == -1) {
log_perror("epoll_ctl(EPOLL_CTL_ADD)");
exit(1);
}
+ if (is_tls) {
+ assert(tls_server_contexts.count(acceptor));
+ client_ptr->tls_context = tls_accept(tls_server_contexts[acceptor]);
+ if (client_ptr->tls_context == NULL) {
+ log(ERROR, "tls_accept() failed");
+ close_client(client_ptr);
+ return;
+ }
+ tls_make_exportable(client_ptr->tls_context, 1);
+ }
+
process_client(client_ptr);
}
// Start listening on data from this socket.
epoll_event ev;
if (client.state() == Client::READING_REQUEST) {
- ev.events = EPOLLIN | EPOLLET | EPOLLRDHUP;
+ // See the corresponding comment in Server::add_client().
+ if (client.has_tls_context()) {
+ ev.events = EPOLLIN | EPOLLOUT | EPOLLET | EPOLLRDHUP;
+ } else {
+ ev.events = EPOLLIN | EPOLLET | EPOLLRDHUP;
+ }
} else {
// If we don't have more data for this client, we'll be putting it into
// the sleeping array again soon.
ev.events = EPOLLOUT | EPOLLET | EPOLLRDHUP;
}
- ev.data.u64 = reinterpret_cast<uint64_t>(client_ptr);
+ ev.data.ptr = client_ptr;
if (epoll_ctl(epoll_fd, EPOLL_CTL_ADD, client.sock(), &ev) == -1) {
log_perror("epoll_ctl(EPOLL_CTL_ADD)");
exit(1);
int Server::lookup_stream_by_url(const string &url) const
{
- map<string, int>::const_iterator url_it = url_map.find(url);
- if (url_it == url_map.end()) {
+ map<string, int>::const_iterator stream_url_it = stream_url_map.find(url);
+ if (stream_url_it == stream_url_map.end()) {
return -1;
}
- return url_it->second;
+ return stream_url_it->second;
}
-int Server::add_stream(const string &url, size_t backlog_size, size_t prebuffering_bytes, Stream::Encoding encoding)
+int Server::add_stream(const string &url, size_t backlog_size, size_t prebuffering_bytes, Stream::Encoding encoding, Stream::Encoding src_encoding)
{
MutexLock lock(&mutex);
- url_map.insert(make_pair(url, streams.size()));
- streams.push_back(new Stream(url, backlog_size, prebuffering_bytes, encoding));
+ stream_url_map.insert(make_pair(url, streams.size()));
+ streams.push_back(new Stream(url, backlog_size, prebuffering_bytes, encoding, src_encoding));
return streams.size() - 1;
}
int Server::add_stream_from_serialized(const StreamProto &stream, int data_fd)
{
MutexLock lock(&mutex);
- url_map.insert(make_pair(stream.url(), streams.size()));
+ stream_url_map.insert(make_pair(stream.url(), streams.size()));
streams.push_back(new Stream(stream, data_fd));
return streams.size() - 1;
}
assert(stream_index >= 0 && stream_index < ssize_t(streams.size()));
streams[stream_index]->encoding = encoding;
}
+
+void Server::set_src_encoding(int stream_index, Stream::Encoding encoding)
+{
+ MutexLock lock(&mutex);
+ assert(stream_index >= 0 && stream_index < ssize_t(streams.size()));
+ streams[stream_index]->src_encoding = encoding;
+}
void Server::set_header(int stream_index, const string &http_header, const string &stream_header)
{
streams[stream_index]->pacing_rate = pacing_rate;
}
-void Server::add_data_deferred(int stream_index, const char *data, size_t bytes, StreamStartSuitability suitable_for_stream_start)
+void Server::add_gen204(const std::string &url, const std::string &allow_origin)
+{
+ MutexLock lock(&mutex);
+ assert(clients.empty());
+ ping_url_map[url] = allow_origin;
+}
+
+void Server::create_tls_context_for_acceptor(const Acceptor *acceptor)
+{
+ assert(acceptor->is_tls());
+
+ bool is_server = true;
+ TLSContext *server_context = tls_create_context(is_server, TLS_V12);
+
+ const string &cert = acceptor->get_certificate_chain();
+ int num_cert = tls_load_certificates(server_context, reinterpret_cast<const unsigned char *>(cert.data()), cert.size());
+ assert(num_cert > 0); // Should have been checked by config earlier.
+
+ const string &key = acceptor->get_private_key();
+ int num_key = tls_load_private_key(server_context, reinterpret_cast<const unsigned char *>(key.data()), key.size());
+ assert(num_key > 0); // Should have been checked by config earlier.
+
+ tls_server_contexts.insert(make_pair(acceptor, server_context));
+}
+
+void Server::add_data_deferred(int stream_index, const char *data, size_t bytes, uint16_t metacube_flags)
{
assert(stream_index >= 0 && stream_index < ssize_t(streams.size()));
- streams[stream_index]->add_data_deferred(data, bytes, suitable_for_stream_start);
+ streams[stream_index]->add_data_deferred(data, bytes, metacube_flags);
}
// See the .h file for postconditions after this function.
{
switch (client->state) {
case Client::READING_REQUEST: {
+ if (client->tls_context != NULL) {
+ if (send_pending_tls_data(client)) {
+ // send_pending_tls_data() hit postconditions #1 or #4.
+ return;
+ }
+ }
+
read_request_again:
// Try to read more of the request.
char buf[1024];
int ret;
- do {
- ret = read(client->sock, buf, sizeof(buf));
- } while (ret == -1 && errno == EINTR);
-
- if (ret == -1 && errno == EAGAIN) {
- // No more data right now. Nothing to do.
- // This is postcondition #2.
- return;
- }
- if (ret == -1) {
- log_perror("read");
- close_client(client);
- return;
- }
- if (ret == 0) {
- // OK, the socket is closed.
- close_client(client);
- return;
+ if (client->tls_context == NULL) {
+ ret = read_nontls_data(client, buf, sizeof(buf));
+ if (ret == -1) {
+ // read_nontls_data() hit postconditions #1 or #2.
+ return;
+ }
+ } else {
+ ret = read_tls_data(client, buf, sizeof(buf));
+ if (ret == -1) {
+ // read_tls_data() hit postconditions #1, #2 or #4.
+ return;
+ }
}
RequestParseStatus status = wait_for_double_newline(&client->request, buf, ret);
assert(status == RP_FINISHED);
+ if (client->tls_context && !client->in_ktls_mode && tls_established(client->tls_context)) {
+ // We're ready to enter kTLS mode, unless we still have some
+ // handshake data to send (which then must be sent as non-kTLS).
+ if (send_pending_tls_data(client)) {
+ // send_pending_tls_data() hit postconditions #1 or #4.
+ return;
+ }
+ ret = tls_make_ktls(client->tls_context, client->sock);
+ if (ret < 0) {
+ log_tls_error("tls_make_ktls", ret);
+ close_client(client);
+ return;
+ }
+ client->in_ktls_mode = true;
+ }
+
int error_code = parse_request(client);
if (error_code == 200) {
construct_header(client);
+ } else if (error_code == 204) {
+ construct_204(client);
} else {
construct_error(client, error_code);
}
}
}
+bool Server::send_pending_tls_data(Client *client)
+{
+ // See if there's data from the TLS library to write.
+ if (client->tls_data_to_send == NULL) {
+ client->tls_data_to_send = tls_get_write_buffer(client->tls_context, &client->tls_data_left_to_send);
+ if (client->tls_data_to_send == NULL) {
+ // Really no data to send.
+ return false;
+ }
+ }
+
+send_data_again:
+ int ret;
+ do {
+ ret = write(client->sock, client->tls_data_to_send, client->tls_data_left_to_send);
+ } while (ret == -1 && errno == EINTR);
+ assert(ret < 0 || size_t(ret) <= client->tls_data_left_to_send);
+
+ if (ret == -1 && errno == EAGAIN) {
+ // We're out of socket space, so now we're at the “low edge” of epoll's
+ // edge triggering. epoll will tell us when there is more room, so for now,
+ // just return.
+ // This is postcondition #4.
+ return true;
+ }
+ if (ret == -1) {
+ // Error! Postcondition #1.
+ log_perror("write");
+ close_client(client);
+ return true;
+ }
+ if (ret > 0 && size_t(ret) == client->tls_data_left_to_send) {
+ // All data has been sent, so we don't need to go to sleep.
+ tls_buffer_clear(client->tls_context);
+ client->tls_data_to_send = NULL;
+ return false;
+ }
+
+ // More data to send, so try again.
+ client->tls_data_to_send += ret;
+ client->tls_data_left_to_send -= ret;
+ goto send_data_again;
+}
+
+int Server::read_nontls_data(Client *client, char *buf, size_t max_size)
+{
+ int ret;
+ do {
+ ret = read(client->sock, buf, max_size);
+ } while (ret == -1 && errno == EINTR);
+
+ if (ret == -1 && errno == EAGAIN) {
+ // No more data right now. Nothing to do.
+ // This is postcondition #2.
+ return -1;
+ }
+ if (ret == -1) {
+ log_perror("read");
+ close_client(client);
+ return -1;
+ }
+ if (ret == 0) {
+ // OK, the socket is closed.
+ close_client(client);
+ return -1;
+ }
+
+ return ret;
+}
+
+int Server::read_tls_data(Client *client, char *buf, size_t max_size)
+{
+read_again:
+ int ret;
+ do {
+ ret = read(client->sock, buf, max_size);
+ } while (ret == -1 && errno == EINTR);
+
+ if (ret == -1 && errno == EAGAIN) {
+ // No more data right now. Nothing to do.
+ // This is postcondition #2.
+ return -1;
+ }
+ if (ret == -1) {
+ log_perror("read");
+ close_client(client);
+ return -1;
+ }
+ if (ret == 0) {
+ // OK, the socket is closed.
+ close_client(client);
+ return -1;
+ }
+
+ // Give it to the TLS library.
+ int err = tls_consume_stream(client->tls_context, reinterpret_cast<const unsigned char *>(buf), ret, nullptr);
+ if (err < 0) {
+ log_tls_error("tls_consume_stream", err);
+ close_client(client);
+ return -1;
+ }
+ if (err == 0) {
+ // Not consumed any data. See if we can read more.
+ goto read_again;
+ }
+
+ // Read any decrypted data available for us. (We can reuse buf, since it's free now.)
+ ret = tls_read(client->tls_context, reinterpret_cast<unsigned char *>(buf), max_size);
+ if (ret == 0) {
+ // No decrypted data for us yet, but there might be some more handshaking
+ // to send. Do that if needed, then look for more data.
+ if (send_pending_tls_data(client)) {
+ // send_pending_tls_data() hit postconditions #1 or #4.
+ return -1;
+ }
+ goto read_again;
+ }
+ if (ret < 0) {
+ log_tls_error("tls_read", ret);
+ close_client(client);
+ return -1;
+ }
+
+ assert(ret > 0);
+ return ret;
+}
+
// See if there's some data we've lost. Ideally, we should drop to a block boundary,
// but resync will be the mux's problem.
void Server::skip_lost_data(Client *client)
}
string url = request_tokens[1];
- if (url.find("?backlog") == url.size() - 8) {
+ client->url = url;
+ if (url.size() > 8 && url.find("?backlog") == url.size() - 8) {
client->stream_pos = -2;
url = url.substr(0, url.size() - 8);
} else {
client->stream_pos = -1;
}
- map<string, int>::const_iterator url_map_it = url_map.find(url);
- if (url_map_it == url_map.end()) {
- return 404; // Not found.
+ map<string, int>::const_iterator stream_url_map_it = stream_url_map.find(url);
+ if (stream_url_map_it == stream_url_map.end()) {
+ map<string, string>::const_iterator ping_url_map_it = ping_url_map.find(url);
+ if (ping_url_map_it == ping_url_map.end()) {
+ return 404; // Not found.
+ } else {
+ return 204; // No error.
+ }
}
- Stream *stream = streams[url_map_it->second];
+ Stream *stream = streams[stream_url_map_it->second];
if (stream->http_header.empty()) {
return 503; // Service unavailable.
}
- client->url = request_tokens[1];
-
client->stream = stream;
if (setsockopt(client->sock, SOL_SOCKET, SO_MAX_PACING_RATE, &client->stream->pacing_rate, sizeof(client->stream->pacing_rate)) == -1) {
if (client->stream->pacing_rate != ~0U) {
// Switch states.
client->state = Client::SENDING_HEADER;
-
- epoll_event ev;
- ev.events = EPOLLOUT | EPOLLET | EPOLLRDHUP;
- ev.data.u64 = reinterpret_cast<uint64_t>(client);
-
- if (epoll_ctl(epoll_fd, EPOLL_CTL_MOD, client->sock, &ev) == -1) {
- log_perror("epoll_ctl(EPOLL_CTL_MOD)");
- exit(1);
- }
+ change_epoll_events(client, EPOLLOUT | EPOLLET | EPOLLRDHUP);
}
void Server::construct_error(Client *client, int error_code)
// Switch states.
client->state = Client::SENDING_SHORT_RESPONSE;
+ change_epoll_events(client, EPOLLOUT | EPOLLET | EPOLLRDHUP);
+}
- epoll_event ev;
- ev.events = EPOLLOUT | EPOLLET | EPOLLRDHUP;
- ev.data.u64 = reinterpret_cast<uint64_t>(client);
+void Server::construct_204(Client *client)
+{
+ map<string, string>::const_iterator ping_url_map_it = ping_url_map.find(client->url);
+ assert(ping_url_map_it != ping_url_map.end());
- if (epoll_ctl(epoll_fd, EPOLL_CTL_MOD, client->sock, &ev) == -1) {
- log_perror("epoll_ctl(EPOLL_CTL_MOD)");
- exit(1);
+ if (ping_url_map_it->second.empty()) {
+ client->header_or_short_response =
+ "HTTP/1.0 204 No Content\r\n"
+ "\r\n";
+ } else {
+ char response[256];
+ snprintf(response, 256,
+ "HTTP/1.0 204 No Content\r\n"
+ "Access-Control-Allow-Origin: %s\r\n"
+ "\r\n",
+ ping_url_map_it->second.c_str());
+ client->header_or_short_response = response;
}
+
+ // Switch states.
+ client->state = Client::SENDING_SHORT_RESPONSE;
+ change_epoll_events(client, EPOLLOUT | EPOLLET | EPOLLRDHUP);
}
template<class T>
delete_from(&client->stream->to_process, client);
}
+ if (client->tls_context) {
+ tls_destroy_context(client->tls_context);
+ }
+
// Log to access_log.
access_log->write(client->get_stats());
clients.erase(client->sock);
}
-
+
+void Server::change_epoll_events(Client *client, uint32_t events)
+{
+ epoll_event ev;
+ ev.events = events;
+ ev.data.ptr = client;
+
+ if (epoll_ctl(epoll_fd, EPOLL_CTL_MOD, client->sock, &ev) == -1) {
+ log_perror("epoll_ctl(EPOLL_CTL_MOD)");
+ exit(1);
+ }
+}
+
void Server::process_queued_data()
{
{
MutexLock lock(&queued_clients_mutex);
for (size_t i = 0; i < queued_add_clients.size(); ++i) {
- add_client(queued_add_clients[i]);
+ add_client(queued_add_clients[i].first, queued_add_clients[i].second);
}
queued_add_clients.clear();
}