-#include <stdio.h>
-#include <string.h>
-#include <stdint.h>
#include <assert.h>
-#include <arpa/inet.h>
-#include <sys/socket.h>
-#include <pthread.h>
-#include <sys/types.h>
-#include <sys/ioctl.h>
-#include <sys/poll.h>
-#include <signal.h>
#include <errno.h>
-#include <ctype.h>
-#include <vector>
-#include <string>
+#include <getopt.h>
+#include <limits.h>
+#include <signal.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/time.h>
+#include <sys/wait.h>
+#include <systemd/sd-daemon.h>
+#include <unistd.h>
+#include <algorithm>
#include <map>
#include <set>
+#include <string>
+#include <unordered_map>
+#include <utility>
+#include <vector>
-#include "metacube.h"
-#include "parse.h"
-#include "server.h"
-#include "serverpool.h"
+#include "tlse.h"
+
+#include "acceptor.h"
+#include "accesslog.h"
+#include "config.h"
#include "input.h"
+#include "input_stats.h"
+#include "log.h"
+#include "sa_compare.h"
+#include "serverpool.h"
#include "state.pb.h"
-
-#define STREAM_ID "stream"
-#define STREAM_URL "http://gruessi.zrh.sesse.net:4013/"
+#include "stats.h"
+#include "stream.h"
+#include "util.h"
+#include "version.h"
using namespace std;
-ServerPool *servers = NULL;
+AccessLogThread *access_log = nullptr;
+ServerPool *servers = nullptr;
volatile bool hupped = false;
+volatile bool stopped = false;
+
+typedef pair<string, Input::Encoding> InputKey;
+
+namespace {
+
+struct OrderByConnectionTime {
+ bool operator() (const ClientProto &a, const ClientProto &b) const {
+ if (a.connect_time_sec() != b.connect_time_sec())
+ return a.connect_time_sec() < b.connect_time_sec();
+ return a.connect_time_nsec() < b.connect_time_nsec();
+ }
+};
+
+// An arbitrary ordering.
+struct AcceptorConfigCompare {
+ bool operator() (const AcceptorConfig &a, const AcceptorConfig &b) const {
+ int cmp = a.certificate_chain.compare(b.certificate_chain);
+ if (cmp != 0) {
+ return cmp < 0;
+ }
+
+ cmp = a.private_key.compare(b.private_key);
+ if (cmp != 0) {
+ return cmp < 0;
+ }
+
+ return Sockaddr6Compare()(a.addr, b.addr);
+ }
+};
-void hup(int ignored)
+} // namespace
+
+struct InputWithRefcount {
+ Input *input;
+ int refcount;
+};
+
+void hup(int signum)
{
hupped = true;
+ if (signum == SIGINT) {
+ stopped = true;
+ }
}
-int create_server_socket(int port)
+void do_nothing(int signum)
{
- int server_sock = socket(PF_INET6, SOCK_STREAM, IPPROTO_TCP);
- if (server_sock == -1) {
- perror("socket");
- exit(1);
+}
+
+CubemapStateProto collect_state(const timespec &serialize_start,
+ const vector<Acceptor *> acceptors,
+ const multimap<InputKey, InputWithRefcount> inputs,
+ ServerPool *servers)
+{
+ CubemapStateProto state = servers->serialize(); // Fills streams() and clients().
+ state.set_serialize_start_sec(serialize_start.tv_sec);
+ state.set_serialize_start_usec(serialize_start.tv_nsec / 1000);
+
+ for (Acceptor *acceptor : acceptors) {
+ state.add_acceptors()->MergeFrom(acceptor->serialize());
}
- int one = 1;
- if (setsockopt(server_sock, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)) == -1) {
- perror("setsockopt(SO_REUSEADDR)");
- exit(1);
+ for (const auto &key_and_input_with_refcount : inputs) {
+ state.add_inputs()->MergeFrom(key_and_input_with_refcount.second.input->serialize());
}
- // We want dual-stack sockets. (Sorry, OpenBSD and Windows XP...)
- int zero = 0;
- if (setsockopt(server_sock, IPPROTO_IPV6, IPV6_V6ONLY, &zero, sizeof(zero)) == -1) {
- perror("setsockopt(IPV6_V6ONLY)");
- exit(1);
+ return state;
+}
+
+// Find all port statements in the configuration file, and create acceptors for them.
+vector<Acceptor *> create_acceptors(
+ const Config &config,
+ map<AcceptorConfig, Acceptor *, AcceptorConfigCompare> *deserialized_acceptors)
+{
+ vector<Acceptor *> acceptors;
+ for (const AcceptorConfig &acceptor_config : config.acceptors) {
+ Acceptor *acceptor = nullptr;
+ const auto deserialized_acceptor_it = deserialized_acceptors->find(acceptor_config);
+ if (deserialized_acceptor_it != deserialized_acceptors->end()) {
+ acceptor = deserialized_acceptor_it->second;
+ deserialized_acceptors->erase(deserialized_acceptor_it);
+ } else {
+ int server_sock = create_server_socket(acceptor_config.addr, TCP_SOCKET);
+ acceptor = new Acceptor(server_sock, acceptor_config.addr,
+ acceptor_config.certificate_chain,
+ acceptor_config.private_key);
+ }
+ acceptor->run();
+ acceptors.push_back(acceptor);
}
- // Set as non-blocking, so the acceptor thread can notice that we want to shut it down.
- if (ioctl(server_sock, FIONBIO, &one) == -1) {
- perror("ioctl(FIONBIO)");
- exit(1);
+ // Close all acceptors that are no longer in the configuration file.
+ for (auto &config_and_acceptor : *deserialized_acceptors) {
+ config_and_acceptor.second->close_socket();
+ delete config_and_acceptor.second;
}
- sockaddr_in6 addr;
- memset(&addr, 0, sizeof(addr));
- addr.sin6_family = AF_INET6;
- addr.sin6_port = htons(port);
+ return acceptors;
+}
- if (bind(server_sock, reinterpret_cast<sockaddr *>(&addr), sizeof(addr)) == -1) {
- perror("bind");
- exit(1);
+void create_config_input(const string &src, Input::Encoding encoding, multimap<InputKey, InputWithRefcount> *inputs)
+{
+ if (src.empty()) {
+ return;
}
-
- if (listen(server_sock, 128) == -1) {
- perror("listen");
- exit(1);
+ InputKey key(src, encoding);
+ if (inputs->count(key) != 0) {
+ return;
}
- return server_sock;
+ InputWithRefcount iwr;
+ iwr.input = create_input(src, encoding);
+ if (iwr.input == nullptr) {
+ log(ERROR, "did not understand URL '%s' or source encoding was invalid, clients will not get any data.",
+ src.c_str());
+ return;
+ }
+ iwr.refcount = 0;
+ inputs->insert(make_pair(key, iwr));
}
-void *acceptor_thread_run(void *arg)
+// Find all streams in the configuration file, and create inputs for them.
+void create_config_inputs(const Config &config, multimap<InputKey, InputWithRefcount> *inputs)
{
- int server_sock = int(intptr_t(arg));
- while (!hupped) {
- // Since we are non-blocking, we need to wait for the right state first.
- // Wait up to 50 ms, then check hupped.
- pollfd pfd;
- pfd.fd = server_sock;
- pfd.events = POLLIN;
-
- int nfds = poll(&pfd, 1, 50);
- if (nfds == 0 || (nfds == -1 && errno == EAGAIN)) {
- continue;
- }
- if (nfds == -1) {
- perror("poll");
- usleep(100000);
+ for (const StreamConfig &stream_config : config.streams) {
+ if (stream_config.src == "delete") {
+ // Ignored for pre-1.4.0 configuration compatibility.
continue;
}
+ create_config_input(stream_config.src, Input::Encoding(stream_config.src_encoding), inputs);
+ }
+ for (const UDPStreamConfig &udpstream_config : config.udpstreams) {
+ create_config_input(udpstream_config.src, Input::INPUT_ENCODING_RAW, inputs);
+ }
+}
- sockaddr_in6 addr;
- socklen_t addrlen = sizeof(addr);
+void create_streams(const Config &config,
+ const set<string> &deserialized_urls,
+ multimap<InputKey, InputWithRefcount> *inputs)
+{
+ // HTTP streams.
+ set<string> expecting_urls = deserialized_urls;
+ for (const StreamConfig &stream_config : config.streams) {
+ int stream_index;
- // Get a new socket.
- int sock = accept(server_sock, reinterpret_cast<sockaddr *>(&addr), &addrlen);
- if (sock == -1 && errno == EINTR) {
- continue;
- }
- if (sock == -1) {
- perror("accept");
- usleep(100000);
+ expecting_urls.erase(stream_config.url);
+
+ if (stream_config.src == "delete") {
+ // Ignored for pre-1.4.0 configuration compatibility.
continue;
}
- // Set the socket as nonblocking.
- int one = 1;
- if (ioctl(sock, FIONBIO, &one) == -1) {
- perror("FIONBIO");
- exit(1);
+ if (deserialized_urls.count(stream_config.url) == 0) {
+ stream_index = servers->add_stream(stream_config.url,
+ stream_config.hls_url,
+ stream_config.backlog_size,
+ stream_config.prebuffering_bytes,
+ Stream::Encoding(stream_config.encoding),
+ Stream::Encoding(stream_config.src_encoding),
+ stream_config.hls_frag_duration,
+ stream_config.hls_backlog_margin,
+ stream_config.allow_origin);
+ } else {
+ stream_index = servers->lookup_stream_by_url(stream_config.url);
+ assert(stream_index != -1);
+ servers->set_backlog_size(stream_index, stream_config.backlog_size);
+ if (!stream_config.hls_url.empty()) {
+ servers->register_hls_url(stream_index, stream_config.hls_url);
+ }
+ servers->set_prebuffering_bytes(stream_index, stream_config.prebuffering_bytes);
+ servers->set_encoding(stream_index,
+ Stream::Encoding(stream_config.encoding));
+ servers->set_src_encoding(stream_index,
+ Stream::Encoding(stream_config.src_encoding));
+ servers->set_hls_frag_duration(stream_index, stream_config.hls_frag_duration);
+ servers->set_hls_backlog_margin(stream_index, stream_config.hls_backlog_margin);
+ servers->set_allow_origin(stream_index, stream_config.allow_origin);
}
- // Pick a server, round-robin, and hand over the socket to it.
- servers->add_client(sock);
- }
- return NULL;
-}
+ servers->set_pacing_rate(stream_index, stream_config.pacing_rate);
-// Serialize the given state to a file descriptor, and return the (still open)
-// descriptor.
-int make_tempfile(const CubemapStateProto &state)
-{
- char tmpl[] = "/tmp/cubemapstate.XXXXXX";
- int state_fd = mkstemp(tmpl);
- if (state_fd == -1) {
- perror("mkstemp");
- exit(1);
+ string src = stream_config.src;
+ Input::Encoding src_encoding = Input::Encoding(stream_config.src_encoding);
+ if (!src.empty()) {
+ const auto input_it = inputs->find(make_pair(src, src_encoding));
+ if (input_it != inputs->end()) {
+ input_it->second.input->add_destination(stream_index);
+ ++input_it->second.refcount;
+ }
+ }
}
- string serialized;
- state.SerializeToString(&serialized);
+ // Warn about any streams servers we've lost.
+ for (const string &url : expecting_urls) {
+ log(WARNING, "stream '%s' disappeared from the configuration file. "
+ "It will not be deleted, but clients will not get any new inputs. "
+ "If you really meant to delete it, set src=delete and reload.",
+ url.c_str());
+ }
- const char *ptr = serialized.data();
- size_t to_write = serialized.size();
- while (to_write > 0) {
- ssize_t ret = write(state_fd, ptr, to_write);
- if (ret == -1) {
- perror("write");
- exit(1);
+ // UDP streams.
+ for (const UDPStreamConfig &udpstream_config : config.udpstreams) {
+ int stream_index = servers->add_udpstream(
+ udpstream_config.dst,
+ udpstream_config.pacing_rate,
+ udpstream_config.ttl,
+ udpstream_config.multicast_iface_index);
+
+ string src = udpstream_config.src;
+ if (!src.empty()) {
+ auto input_it = inputs->find(make_pair(src, Input::INPUT_ENCODING_RAW));
+ assert(input_it != inputs->end());
+ input_it->second.input->add_destination(stream_index);
+ ++input_it->second.refcount;
}
-
- ptr += ret;
- to_write -= ret;
}
- return state_fd;
+ // HTTP gen204 endpoints.
+ for (const Gen204Config &ping_config : config.pings) {
+ servers->add_gen204(ping_config.url, ping_config.allow_origin);
+ }
+}
+
+void open_logs(const vector<LogConfig> &log_destinations)
+{
+ for (const LogConfig &log_destination : log_destinations) {
+ if (log_destination.type == LogConfig::LOG_TYPE_FILE) {
+ add_log_destination_file(log_destination.filename);
+ } else if (log_destination.type == LogConfig::LOG_TYPE_CONSOLE) {
+ add_log_destination_console();
+ } else if (log_destination.type == LogConfig::LOG_TYPE_SYSLOG) {
+ add_log_destination_syslog();
+ } else {
+ assert(false);
+ }
+ }
+ start_logging();
+}
+
+bool dry_run_config(const string &argv0, const string &config_filename)
+{
+ char *argv0_copy = strdup(argv0.c_str());
+ char *config_filename_copy = strdup(config_filename.c_str());
+
+ pid_t pid = fork();
+ switch (pid) {
+ case -1:
+ log_perror("fork()");
+ free(argv0_copy);
+ free(config_filename_copy);
+ return false;
+ case 0:
+ // Child.
+ execlp(argv0_copy, argv0_copy, "--test-config", config_filename_copy, nullptr);
+ log_perror(argv0_copy);
+ _exit(1);
+ default:
+ // Parent.
+ break;
+ }
+
+ free(argv0_copy);
+ free(config_filename_copy);
+
+ int status;
+ pid_t err;
+ do {
+ err = waitpid(pid, &status, 0);
+ } while (err == -1 && errno == EINTR);
+
+ if (err == -1) {
+ log_perror("waitpid()");
+ return false;
+ }
+
+ return (WIFEXITED(status) && WEXITSTATUS(status) == 0);
}
-// Read the state back from the file descriptor made by make_tempfile,
-// and close it.
-CubemapStateProto read_tempfile(int state_fd)
+void find_all_streams(const Config &config, set<string> *all_urls)
{
- if (lseek(state_fd, 0, SEEK_SET) == -1) {
- perror("lseek");
- exit(1);
+ for (const StreamConfig &stream_config : config.streams) {
+ if (stream_config.src == "delete") {
+ log(WARNING, "stream '%s' has src=delete; ignoring it. Since Cubemap 1.4.0, you do not "
+ "need to set src=delete to delete streams anymore; just delete them from "
+ "the configuration file.",
+ stream_config.url.c_str());
+ } else {
+ all_urls->insert(stream_config.url);
+ }
}
+}
- string serialized;
- char buf[4096];
+int main(int argc, char **argv)
+{
+ signal(SIGHUP, hup);
+ signal(SIGINT, hup);
+ signal(SIGUSR1, do_nothing); // Used in internal signalling.
+ signal(SIGPIPE, SIG_IGN);
+
+ tls_init();
+
+ // Parse options.
+ int state_fd = -1;
+ bool test_config = false;
for ( ;; ) {
- ssize_t ret = read(state_fd, buf, sizeof(buf));
- if (ret == -1) {
- perror("read");
- exit(1);
+ static const option long_options[] = {
+ { "state", required_argument, 0, 's' },
+ { "test-config", no_argument, 0, 't' },
+ { 0, 0, 0, 0 }
+ };
+ int option_index = 0;
+ int c = getopt_long(argc, argv, "s:t", long_options, &option_index);
+
+ if (c == -1) {
+ break;
}
- if (ret == 0) {
- // EOF.
+ switch (c) {
+ case 's':
+ state_fd = atoi(optarg);
+ break;
+ case 't':
+ test_config = true;
break;
+ default:
+ fprintf(stderr, "Unknown option '%s'\n", argv[option_index]);
+ exit(1);
}
+ }
- serialized.append(string(buf, buf + ret));
+ string config_filename = "cubemap.config";
+ if (optind < argc) {
+ config_filename = argv[optind++];
}
- close(state_fd); // Implicitly deletes the file.
+ // Canonicalize argv[0] and config_filename.
+ char argv0_canon[PATH_MAX];
+ char config_filename_canon[PATH_MAX];
- CubemapStateProto state;
- if (!state.ParseFromString(serialized)) {
- fprintf(stderr, "PANIC: Failed deserialization of state.\n");
+ if (realpath("/proc/self/exe", argv0_canon) == nullptr) {
+ log_perror(argv[0]);
+ exit(1);
+ }
+ if (realpath(config_filename.c_str(), config_filename_canon) == nullptr) {
+ log_perror(config_filename.c_str());
exit(1);
}
- return state;
-}
-
-int main(int argc, char **argv)
-{
- fprintf(stderr, "\nCubemap starting.\n");
-
- string config_filename = (argc == 1) ? "cubemap.config" : argv[1];
- vector<ConfigLine> config = parse_config(config_filename);
+ // Now parse the configuration file.
+ Config config;
+ if (!parse_config(config_filename_canon, &config)) {
+ exit(1);
+ }
+ if (test_config) {
+ exit(0);
+ }
+
+ // Ideally we'd like to daemonize only when we've started up all threads etc.,
+ // but daemon() forks, which is not good in multithreaded software, so we'll
+ // have to do it here.
+ if (config.daemonize) {
+ if (daemon(0, 0) == -1) {
+ log_perror("daemon");
+ exit(1);
+ }
+ }
- int port = fetch_config_int(config, "port", 1, 65535);
- int num_servers = fetch_config_int(config, "num_servers", 1, 20000); // Insanely high max limit.
+start:
+ // Open logs as soon as possible.
+ open_logs(config.log_destinations);
- servers = new ServerPool(num_servers);
+ log(INFO, "Cubemap " SERVER_VERSION " starting.");
+ if (config.access_log_file.empty()) {
+ // Create a dummy logger.
+ access_log = new AccessLogThread();
+ } else {
+ access_log = new AccessLogThread(config.access_log_file);
+ }
+ access_log->run();
+
+ servers = new ServerPool(config.num_servers);
+
+ // Find all the streams that are to be kept.
+ set<string> all_urls;
+ find_all_streams(config, &all_urls);
+
+ CubemapStateProto loaded_state;
+ timespec serialize_start;
+ set<string> deserialized_urls;
+ map<AcceptorConfig, Acceptor *, AcceptorConfigCompare> deserialized_acceptors;
+ multimap<InputKey, InputWithRefcount> inputs; // multimap due to older versions without deduplication.
+ if (state_fd != -1) {
+ log(INFO, "Deserializing state from previous process...");
+ string serialized;
+ if (!read_tempfile_and_close(state_fd, &serialized)) {
+ exit(1);
+ }
+ if (!loaded_state.ParseFromString(serialized)) {
+ log(ERROR, "Failed deserialization of state.");
+ exit(1);
+ }
- int server_sock = -1, old_port = -1;
- set<string> deserialized_stream_ids;
- map<string, Input *> deserialized_inputs;
- if (argc == 4 && strcmp(argv[2], "-state") == 0) {
- fprintf(stderr, "Deserializing state from previous process... ");
- int state_fd = atoi(argv[3]);
- CubemapStateProto loaded_state = read_tempfile(state_fd);
+ serialize_start.tv_sec = loaded_state.serialize_start_sec();
+ serialize_start.tv_nsec = loaded_state.serialize_start_usec() * 1000ull;
// Deserialize the streams.
- for (int i = 0; i < loaded_state.streams_size(); ++i) {
- servers->add_stream_from_serialized(loaded_state.streams(i));
- deserialized_stream_ids.insert(loaded_state.streams(i).stream_id());
- }
-
- // Put back the existing clients. It doesn't matter which server we
- // allocate them to, so just do round-robin.
- for (int i = 0; i < loaded_state.clients_size(); ++i) {
- servers->add_client_from_serialized(loaded_state.clients(i));
+ unordered_map<string, string> stream_headers_for_url; // See below.
+ for (const StreamProto &stream : loaded_state.streams()) {
+ if (all_urls.count(stream.url()) == 0) {
+ // Delete the stream backlogs.
+ log(INFO, "Deleting stream '%s'.", stream.url().c_str());
+ for (const int fd : stream.data_fds()) {
+ safe_close(fd);
+ }
+ } else {
+ vector<int> data_fds;
+ for (const int fd : stream.data_fds()) {
+ data_fds.push_back(fd);
+ }
+
+ servers->add_stream_from_serialized(stream, data_fds);
+ deserialized_urls.insert(stream.url());
+
+ stream_headers_for_url.insert(make_pair(stream.url(), stream.stream_header()));
+ }
}
- // Deserialize the inputs. Note that we don't actually add them to any state yet.
- for (int i = 0; i < loaded_state.inputs_size(); ++i) {
- deserialized_inputs.insert(make_pair(
- loaded_state.inputs(i).stream_id(),
- new Input(loaded_state.inputs(i))));
+ // Deserialize the inputs. Note that we don't actually add them to any stream yet.
+ for (const InputProto &serialized_input : loaded_state.inputs()) {
+ InputWithRefcount iwr;
+ iwr.input = create_input(serialized_input);
+ iwr.refcount = 0;
+
+ Input::Encoding src_encoding = serialized_input.is_metacube_encoded() ?
+ Input::INPUT_ENCODING_METACUBE :
+ Input::INPUT_ENCODING_RAW;
+ InputKey key(serialized_input.url(), src_encoding);
+ inputs.insert(make_pair(key, iwr));
}
- // Deserialize the server socket.
- server_sock = loaded_state.server_sock();
- old_port = loaded_state.port();
+ // Deserialize the acceptors.
+ for (const AcceptorProto &serialized_acceptor : loaded_state.acceptors()) {
+ AcceptorConfig config;
+ config.addr = extract_address_from_acceptor_proto(serialized_acceptor);
+ config.certificate_chain = serialized_acceptor.certificate_chain();
+ config.private_key = serialized_acceptor.private_key();
+ deserialized_acceptors.insert(make_pair(
+ config,
+ new Acceptor(serialized_acceptor)));
+ }
- fprintf(stderr, "done.\n");
+ log(INFO, "Deserialization done.");
}
- // Find all streams in the configuration file, and create them.
- set<string> expecting_stream_ids = deserialized_stream_ids;
- for (unsigned i = 0; i < config.size(); ++i) {
- if (config[i].keyword != "stream") {
- continue;
- }
- if (config[i].arguments.size() != 1) {
- fprintf(stderr, "ERROR: 'stream' takes exactly one argument\n");
- exit(1);
- }
- string stream_id = config[i].arguments[0];
- if (deserialized_stream_ids.count(stream_id) == 0) {
- servers->add_stream(stream_id);
- }
- expecting_stream_ids.erase(stream_id);
- }
-
- // Warn about any servers we've lost.
- // TODO: Make an option (delete=yes?) to actually shut down streams.
- for (set<string>::const_iterator stream_it = expecting_stream_ids.begin();
- stream_it != expecting_stream_ids.end();
- ++stream_it) {
- string stream_id = *stream_it;
- fprintf(stderr, "WARNING: stream '%s' disappeared from the configuration file.\n",
- stream_id.c_str());
- fprintf(stderr, " It will not be deleted, but clients will not get any new inputs.\n");
- if (deserialized_inputs.count(stream_id) != 0) {
- delete deserialized_inputs[stream_id];
- deserialized_inputs.erase(stream_id);
+ // Add any new inputs coming from the config.
+ create_config_inputs(config, &inputs);
+
+ // Find all streams in the configuration file, create them, and connect to the inputs.
+ create_streams(config, deserialized_urls, &inputs);
+ vector<Acceptor *> acceptors = create_acceptors(config, &deserialized_acceptors);
+
+ // Make all the servers create TLS contexts for every TLS keypair we have.
+ for (Acceptor *acceptor : acceptors) {
+ if (acceptor->is_tls()) {
+ servers->create_tls_context_for_acceptor(acceptor);
}
}
- // Open a new server socket if we do not already have one, or if we changed ports.
- if (server_sock != -1 && port != old_port) {
- fprintf(stderr, "NOTE: Port changed from %d to %d; opening new socket.\n", old_port, port);
- close(server_sock);
- server_sock = -1;
+ // Allocate strings for the short responses.
+ vector<shared_ptr<const string>> short_response_pool;
+ for (const ShortResponsePool &str : loaded_state.short_response_pool()) {
+ short_response_pool.emplace_back(new string(str.header_or_short_response()));
+ }
+
+ // Put back the existing clients. It doesn't matter which server we
+ // allocate them to, so just do round-robin. However, we need to sort them
+ // by connection time first, since add_client_serialized() expects that.
+ sort(loaded_state.mutable_clients()->begin(),
+ loaded_state.mutable_clients()->end(),
+ OrderByConnectionTime());
+ for (int i = 0; i < loaded_state.clients_size(); ++i) {
+ if (!loaded_state.clients(i).url().empty() &&
+ all_urls.count(loaded_state.clients(i).url()) == 0) {
+ // Belongs to a dead stream (not keepalive), so we just have to close.
+ safe_close(loaded_state.clients(i).sock());
+ } else {
+ servers->add_client_from_serialized(loaded_state.clients(i), short_response_pool);
+ }
}
- if (server_sock == -1) {
- server_sock = create_server_socket(port);
+
+ short_response_pool.clear(); // No longer needed; the clients have their own refcounts now.
+
+ // Put back the HLS zombies. There's no really good allocation here
+ // except round-robin; it would be marginally more efficient to match it
+ // to the client (since that would have them deleted immediately when
+ // the client requests the next fragment, instead of being later weeded
+ // out during statistics collection), but it's not a big deal.
+ for (const HLSZombieProto &zombie_proto : loaded_state.hls_zombies()) {
+ servers->add_hls_zombie_from_serialized(zombie_proto);
}
servers->run();
- pthread_t acceptor_thread;
- pthread_create(&acceptor_thread, NULL, acceptor_thread_run, reinterpret_cast<void *>(server_sock));
-
- // Find all streams in the configuration file, and create inputs for them.
- vector<Input *> inputs;
- for (unsigned i = 0; i < config.size(); ++i) {
- if (config[i].keyword != "stream") {
- continue;
+ // Now delete all inputs that are longer in use, and start the others.
+ for (auto input_it = inputs.begin(); input_it != inputs.end(); ) {
+ if (input_it->second.refcount == 0) {
+ if (input_it->first.second == Input::INPUT_ENCODING_RAW) {
+ log(WARNING, "Raw input '%s' no longer in use, closing.",
+ input_it->first.first.c_str());
+ } else {
+ assert(input_it->first.second == Input::INPUT_ENCODING_METACUBE);
+ log(WARNING, "Metacube input '%s' no longer in use, closing.",
+ input_it->first.first.c_str());
+ }
+ input_it->second.input->close_socket();
+ delete input_it->second.input;
+ inputs.erase(input_it++);
+ } else {
+ input_it->second.input->run();
+ ++input_it;
}
- assert(config[i].arguments.size() == 1);
- string stream_id = config[i].arguments[0];
+ }
- if (config[i].parameters.count("src") == 0) {
- fprintf(stderr, "WARNING: stream '%s' has no src= attribute, clients will not get any data.\n",
- stream_id.c_str());
- continue;
- }
+ // Start writing statistics.
+ unique_ptr<StatsThread> stats_thread;
+ if (!config.stats_file.empty()) {
+ stats_thread.reset(new StatsThread(config.stats_file, config.stats_interval));
+ stats_thread->run();
+ }
- string src = config[i].parameters["src"];
- Input *input = NULL;
- if (deserialized_inputs.count(stream_id) != 0) {
- input = deserialized_inputs[stream_id];
- if (input->get_url() != src) {
- fprintf(stderr, "INFO: Stream '%s' has changed URL from '%s' to '%s', restarting input.\n",
- stream_id.c_str(), input->get_url().c_str(), src.c_str());
- delete input;
- input = NULL;
- }
- deserialized_inputs.erase(stream_id);
+ unique_ptr<InputStatsThread> input_stats_thread;
+ if (!config.input_stats_file.empty()) {
+ vector<Input*> inputs_no_refcount;
+ for (const auto &key_and_input_with_refcount : inputs) {
+ inputs_no_refcount.push_back(key_and_input_with_refcount.second.input);
}
- if (input == NULL) {
- input = new Input(stream_id, src);
- }
- input->run();
- inputs.push_back(input);
+
+ input_stats_thread.reset(new InputStatsThread(config.input_stats_file, config.input_stats_interval, inputs_no_refcount));
+ input_stats_thread->run();
}
- // All deserialized inputs should now have been taken care of, one way or the other.
- assert(deserialized_inputs.empty());
+ timespec server_start;
+ int err = clock_gettime(CLOCK_MONOTONIC, &server_start);
+ assert(err != -1);
+ if (state_fd != -1) {
+ // Measure time from we started deserializing (below) to now, when basically everything
+ // is up and running. This is, in other words, a conservative estimate of how long our
+ // “glitch” period was, not counting of course reconnects if the configuration changed.
+ double glitch_time = server_start.tv_sec - serialize_start.tv_sec +
+ 1e-9 * (server_start.tv_nsec - serialize_start.tv_nsec);
+ log(INFO, "Re-exec happened in approx. %.0f ms.", glitch_time * 1000.0);
+ }
- signal(SIGHUP, hup);
+ sd_notify(0, "READY=1");
while (!hupped) {
usleep(100000);
}
- // OK, we've been HUPed. Time to shut down everything, serialize, and re-exec.
- if (pthread_join(acceptor_thread, NULL) == -1) {
- perror("pthread_join");
- exit(1);
+ if (stopped) {
+ sd_notify(0, "STOPPING=1");
+ } else {
+ sd_notify(0, "RELOADING=1");
}
- CubemapStateProto state;
- state.set_server_sock(server_sock);
- state.set_port(port);
+ // OK, we've been HUPed. Time to shut down everything, serialize, and re-exec.
+ err = clock_gettime(CLOCK_MONOTONIC, &serialize_start);
+ assert(err != -1);
- for (size_t i = 0; i < inputs.size(); ++i) {
- inputs[i]->stop();
- state.add_inputs()->MergeFrom(inputs[i]->serialize());
+ if (input_stats_thread != nullptr) {
+ input_stats_thread->stop();
+ input_stats_thread.reset();
}
+ if (stats_thread != nullptr) {
+ stats_thread->stop();
+ stats_thread.reset();
+ }
+ for (Acceptor *acceptor : acceptors) {
+ acceptor->stop();
+ }
+ for (const auto &key_and_input_with_refcount : inputs) {
+ key_and_input_with_refcount.second.input->stop();
+ }
+ servers->stop();
- for (int i = 0; i < num_servers; ++i) {
- servers->get_server(i)->stop();
-
- CubemapStateProto local_state = servers->get_server(i)->serialize();
-
- // The stream state should be identical between the servers, so we only store it once.
- if (i == 0) {
- state.mutable_streams()->MergeFrom(local_state.streams());
- }
- for (int j = 0; j < local_state.clients_size(); ++j) {
- state.add_clients()->MergeFrom(local_state.clients(j));
+ CubemapStateProto state;
+ if (stopped) {
+ log(INFO, "Shutting down.");
+ } else {
+ log(INFO, "Serializing state and re-execing...");
+ state = collect_state(
+ serialize_start, acceptors, inputs, servers);
+ string serialized;
+ state.SerializeToString(&serialized);
+ state_fd = make_tempfile(serialized);
+ if (state_fd == -1) {
+ exit(1);
}
}
delete servers;
- fprintf(stderr, "Serializing state and re-execing...\n");
- int state_fd = make_tempfile(state);
+ access_log->stop();
+ delete access_log;
+ shut_down_logging();
+
+ if (stopped) {
+ exit(0);
+ }
+ // OK, so the signal was SIGHUP. Check that the new config is okay, then exec the new binary.
+ if (!dry_run_config(argv0_canon, config_filename_canon)) {
+ open_logs(config.log_destinations);
+ log(ERROR, "%s --test-config failed. Restarting old version instead of new.", argv[0]);
+ hupped = false;
+ shut_down_logging();
+ goto start;
+ }
+
char buf[16];
sprintf(buf, "%d", state_fd);
for ( ;; ) {
- execlp(argv[0], argv[0], config_filename.c_str(), "-state", buf, NULL);
- perror("execlp");
- fprintf(stderr, "PANIC: re-exec of %s failed. Waiting 0.2 seconds and trying again...\n", argv[0]);
+ execlp(argv0_canon, argv0_canon, config_filename_canon, "--state", buf, nullptr);
+ open_logs(config.log_destinations);
+ log_perror("execlp");
+ log(ERROR, "re-exec of %s failed. Waiting 0.2 seconds and trying again...", argv0_canon);
+ shut_down_logging();
usleep(200000);
}
}