8 #include <sys/socket.h>
10 #include <sys/types.h>
11 #include <sys/ioctl.h>
14 #include <sys/types.h>
31 #include "serverpool.h"
40 ServerPool *servers = NULL;
41 volatile bool hupped = false;
48 CubemapStateProto collect_state(const timeval &serialize_start,
49 const vector<Acceptor *> acceptors,
50 const vector<Input *> inputs,
53 CubemapStateProto state = servers->serialize(); // Fills streams() and clients().
54 state.set_serialize_start_sec(serialize_start.tv_sec);
55 state.set_serialize_start_usec(serialize_start.tv_usec);
57 for (size_t i = 0; i < acceptors.size(); ++i) {
58 state.add_acceptors()->MergeFrom(acceptors[i]->serialize());
61 for (size_t i = 0; i < inputs.size(); ++i) {
62 state.add_inputs()->MergeFrom(inputs[i]->serialize());
68 // Find all port statements in the configuration file, and create acceptors for htem.
69 vector<Acceptor *> create_acceptors(
71 map<int, Acceptor *> *deserialized_acceptors)
73 vector<Acceptor *> acceptors;
74 for (unsigned i = 0; i < config.acceptors.size(); ++i) {
75 const AcceptorConfig &acceptor_config = config.acceptors[i];
76 Acceptor *acceptor = NULL;
77 map<int, Acceptor *>::iterator deserialized_acceptor_it =
78 deserialized_acceptors->find(acceptor_config.port);
79 if (deserialized_acceptor_it != deserialized_acceptors->end()) {
80 acceptor = deserialized_acceptor_it->second;
81 deserialized_acceptors->erase(deserialized_acceptor_it);
83 int server_sock = create_server_socket(acceptor_config.port, TCP_SOCKET);
84 acceptor = new Acceptor(server_sock, acceptor_config.port);
87 acceptors.push_back(acceptor);
90 // Close all acceptors that are no longer in the configuration file.
91 for (map<int, Acceptor *>::iterator acceptor_it = deserialized_acceptors->begin();
92 acceptor_it != deserialized_acceptors->end();
94 acceptor_it->second->close_socket();
95 delete acceptor_it->second;
101 // Find all streams in the configuration file, and create inputs for them.
102 vector<Input *> create_inputs(const Config &config,
103 map<string, Input *> *deserialized_inputs)
105 vector<Input *> inputs;
106 for (unsigned i = 0; i < config.streams.size(); ++i) {
107 const StreamConfig &stream_config = config.streams[i];
108 if (stream_config.src.empty()) {
112 string stream_id = stream_config.stream_id;
113 string src = stream_config.src;
116 map<string, Input *>::iterator deserialized_input_it =
117 deserialized_inputs->find(stream_id);
118 if (deserialized_input_it != deserialized_inputs->end()) {
119 input = deserialized_input_it->second;
120 if (input->get_url() != src) {
121 fprintf(stderr, "INFO: Stream '%s' has changed URL from '%s' to '%s', restarting input.\n",
122 stream_id.c_str(), input->get_url().c_str(), src.c_str());
123 input->close_socket();
127 deserialized_inputs->erase(deserialized_input_it);
130 input = create_input(stream_id, src);
132 fprintf(stderr, "ERROR: did not understand URL '%s', clients will not get any data.\n",
138 inputs.push_back(input);
143 void create_streams(const Config &config,
144 const set<string> &deserialized_stream_ids,
145 map<string, Input *> *deserialized_inputs)
147 vector<MarkPool *> mark_pools; // FIXME: leak
148 for (unsigned i = 0; i < config.mark_pools.size(); ++i) {
149 const MarkPoolConfig &mp_config = config.mark_pools[i];
150 mark_pools.push_back(new MarkPool(mp_config.from, mp_config.to));
153 set<string> expecting_stream_ids = deserialized_stream_ids;
154 for (unsigned i = 0; i < config.streams.size(); ++i) {
155 const StreamConfig &stream_config = config.streams[i];
156 if (deserialized_stream_ids.count(stream_config.stream_id) == 0) {
157 servers->add_stream(stream_config.stream_id, stream_config.backlog_size);
159 expecting_stream_ids.erase(stream_config.stream_id);
161 if (stream_config.mark_pool != -1) {
162 servers->set_mark_pool(stream_config.stream_id,
163 mark_pools[stream_config.mark_pool]);
167 // Warn about any servers we've lost.
168 // TODO: Make an option (delete=yes?) to actually shut down streams.
169 for (set<string>::const_iterator stream_it = expecting_stream_ids.begin();
170 stream_it != expecting_stream_ids.end();
172 string stream_id = *stream_it;
173 fprintf(stderr, "WARNING: stream '%s' disappeared from the configuration file.\n",
175 fprintf(stderr, " It will not be deleted, but clients will not get any new inputs.\n");
176 if (deserialized_inputs->count(stream_id) != 0) {
177 delete (*deserialized_inputs)[stream_id];
178 deserialized_inputs->erase(stream_id);
183 bool dry_run_config(const std::string &argv0, const std::string &config_filename)
185 char *argv0_copy = strdup(argv0.c_str());
186 char *config_filename_copy = strdup(config_filename.c_str());
193 free(config_filename_copy);
197 execlp(argv0_copy, argv0_copy, "--test-config", config_filename_copy, NULL);
206 free(config_filename_copy);
211 err = waitpid(pid, &status, 0);
212 } while (err == -1 && errno == EINTR);
219 return (WIFEXITED(status) && WEXITSTATUS(status) == 0);
222 int main(int argc, char **argv)
226 bool test_config = false;
228 static const option long_options[] = {
229 { "state", required_argument, 0, 's' },
230 { "test-config", no_argument, 0, 't' },
232 int option_index = 0;
233 int c = getopt_long (argc, argv, "s:t", long_options, &option_index);
240 state_fd = atoi(optarg);
250 string config_filename = "cubemap.config";
252 config_filename = argv[optind++];
256 if (!parse_config(config_filename, &config)) {
264 fprintf(stderr, "\nCubemap " SERVER_VERSION " starting.\n");
265 servers = new ServerPool(config.num_servers);
267 CubemapStateProto loaded_state;
268 struct timeval serialize_start;
269 set<string> deserialized_stream_ids;
270 map<string, Input *> deserialized_inputs;
271 map<int, Acceptor *> deserialized_acceptors;
272 if (state_fd != -1) {
273 fprintf(stderr, "Deserializing state from previous process... ");
275 if (!read_tempfile(state_fd, &serialized)) {
278 if (!loaded_state.ParseFromString(serialized)) {
279 fprintf(stderr, "ERROR: Failed deserialization of state.\n");
283 serialize_start.tv_sec = loaded_state.serialize_start_sec();
284 serialize_start.tv_usec = loaded_state.serialize_start_usec();
286 // Deserialize the streams.
287 for (int i = 0; i < loaded_state.streams_size(); ++i) {
288 servers->add_stream_from_serialized(loaded_state.streams(i));
289 deserialized_stream_ids.insert(loaded_state.streams(i).stream_id());
292 // Deserialize the inputs. Note that we don't actually add them to any state yet.
293 for (int i = 0; i < loaded_state.inputs_size(); ++i) {
294 deserialized_inputs.insert(make_pair(
295 loaded_state.inputs(i).stream_id(),
296 create_input(loaded_state.inputs(i))));
299 // Deserialize the acceptors.
300 for (int i = 0; i < loaded_state.acceptors_size(); ++i) {
301 deserialized_acceptors.insert(make_pair(
302 loaded_state.acceptors(i).port(),
303 new Acceptor(loaded_state.acceptors(i))));
306 fprintf(stderr, "done.\n");
309 // Find all streams in the configuration file, and create them.
310 create_streams(config, deserialized_stream_ids, &deserialized_inputs);
314 vector<Acceptor *> acceptors = create_acceptors(config, &deserialized_acceptors);
315 vector<Input *> inputs = create_inputs(config, &deserialized_inputs);
317 // All deserialized inputs should now have been taken care of, one way or the other.
318 assert(deserialized_inputs.empty());
320 // Put back the existing clients. It doesn't matter which server we
321 // allocate them to, so just do round-robin. However, we need to add
322 // them after the mark pools have been set up.
323 for (int i = 0; i < loaded_state.clients_size(); ++i) {
324 servers->add_client_from_serialized(loaded_state.clients(i));
327 // Start writing statistics.
328 StatsThread *stats_thread = NULL;
329 if (!config.stats_file.empty()) {
330 stats_thread = new StatsThread(config.stats_file, config.stats_interval);
336 struct timeval server_start;
337 gettimeofday(&server_start, NULL);
338 if (state_fd != -1) {
339 // Measure time from we started deserializing (below) to now, when basically everything
340 // is up and running. This is, in other words, a conservative estimate of how long our
341 // “glitch” period was, not counting of course reconnects if the configuration changed.
342 double glitch_time = server_start.tv_sec - serialize_start.tv_sec +
343 1e-6 * (server_start.tv_usec - serialize_start.tv_usec);
344 fprintf(stderr, "Re-exec happened in approx. %.0f ms.\n", glitch_time * 1000.0);
351 // OK, we've been HUPed. Time to shut down everything, serialize, and re-exec.
352 gettimeofday(&serialize_start, NULL);
354 if (stats_thread != NULL) {
355 stats_thread->stop();
357 for (size_t i = 0; i < acceptors.size(); ++i) {
358 acceptors[i]->stop();
360 for (size_t i = 0; i < inputs.size(); ++i) {
365 fprintf(stderr, "Serializing state and re-execing...\n");
366 CubemapStateProto state = collect_state(
367 serialize_start, acceptors, inputs, servers);
369 state.SerializeToString(&serialized);
370 state_fd = make_tempfile(serialized);
371 if (state_fd == -1) {
376 if (!dry_run_config(argv[0], config_filename)) {
377 fprintf(stderr, "ERROR: %s --test-config failed. Restarting old version instead of new.\n", argv[0]);
383 sprintf(buf, "%d", state_fd);
386 execlp(argv[0], argv[0], config_filename.c_str(), "--state", buf, NULL);
388 fprintf(stderr, "PANIC: re-exec of %s failed. Waiting 0.2 seconds and trying again...\n", argv[0]);