#include <string.h>
#include <stdint.h>
#include <assert.h>
+#include <getopt.h>
#include <arpa/inet.h>
#include <sys/socket.h>
#include <pthread.h>
#include <sys/ioctl.h>
#include <sys/poll.h>
#include <sys/time.h>
+#include <sys/types.h>
+#include <sys/wait.h>
#include <signal.h>
#include <errno.h>
#include <ctype.h>
#include <map>
#include <set>
+#include "acceptor.h"
+#include "config.h"
+#include "markpool.h"
#include "metacube.h"
#include "parse.h"
#include "server.h"
#include "serverpool.h"
#include "input.h"
+#include "stats.h"
+#include "version.h"
#include "state.pb.h"
-#define STREAM_ID "stream"
-#define STREAM_URL "http://gruessi.zrh.sesse.net:4013/"
-
using namespace std;
ServerPool *servers = NULL;
hupped = true;
}
-int create_server_socket(int port)
-{
- int server_sock = socket(PF_INET6, SOCK_STREAM, IPPROTO_TCP);
- if (server_sock == -1) {
- perror("socket");
- exit(1);
- }
-
- int one = 1;
- if (setsockopt(server_sock, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)) == -1) {
- perror("setsockopt(SO_REUSEADDR)");
- exit(1);
- }
-
- // 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);
- }
-
- // 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);
- }
-
- sockaddr_in6 addr;
- memset(&addr, 0, sizeof(addr));
- addr.sin6_family = AF_INET6;
- addr.sin6_port = htons(port);
-
- if (bind(server_sock, reinterpret_cast<sockaddr *>(&addr), sizeof(addr)) == -1) {
- perror("bind");
- exit(1);
- }
-
- if (listen(server_sock, 128) == -1) {
- perror("listen");
- exit(1);
- }
-
- return server_sock;
-}
-
-void *acceptor_thread_run(void *arg)
-{
- 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 == EINTR)) {
- continue;
- }
- if (nfds == -1) {
- perror("poll");
- usleep(100000);
- continue;
- }
-
- sockaddr_in6 addr;
- socklen_t addrlen = sizeof(addr);
-
- // 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);
- continue;
- }
-
- // Set the socket as nonblocking.
- int one = 1;
- if (ioctl(sock, FIONBIO, &one) == -1) {
- perror("FIONBIO");
- exit(1);
- }
-
- // Pick a server, round-robin, and hand over the socket to it.
- servers->add_client(sock);
- }
- return NULL;
-}
-
-struct StatsThreadParameters {
- string stats_file;
- int stats_interval;
-};
-
-void *stats_thread_run(void *arg)
-{
- const StatsThreadParameters *parms = reinterpret_cast<StatsThreadParameters *>(arg);
- while (!hupped) {
- int fd;
- FILE *fp;
- time_t now;
- vector<ClientStats> client_stats;
-
- // Open a new, temporary file.
- char *filename = strdup((parms->stats_file + ".new.XXXXXX").c_str());
- fd = mkostemp(filename, O_WRONLY);
- if (fd == -1) {
- perror(filename);
- free(filename);
- goto sleep;
- }
-
- fp = fdopen(fd, "w");
- if (fp == NULL) {
- perror("fdopen");
- close(fd);
- unlink(filename);
- free(filename);
- goto sleep;
- }
-
- now = time(NULL);
- client_stats = servers->get_client_stats();
- for (size_t i = 0; i < client_stats.size(); ++i) {
- fprintf(fp, "%s %s %d %llu\n",
- client_stats[i].remote_addr.c_str(),
- client_stats[i].stream_id.c_str(),
- int(now - client_stats[i].connect_time),
- (long long unsigned)(client_stats[i].bytes_sent));
- }
- if (fclose(fp) == EOF) {
- perror("fclose");
- unlink(filename);
- free(filename);
- goto sleep;
- }
-
- if (rename(filename, parms->stats_file.c_str()) == -1) {
- perror("rename");
- unlink(filename);
- }
-
-sleep:
- int left_to_sleep = parms->stats_interval;
- do {
- left_to_sleep = sleep(left_to_sleep);
- } while (left_to_sleep > 0 && !hupped);
- }
- return NULL;
-}
-
// Serialize the given state to a file descriptor, and return the (still open)
// descriptor.
int make_tempfile(const CubemapStateProto &state)
return state_fd;
}
+CubemapStateProto collect_state(const timeval &serialize_start,
+ const vector<Acceptor *> acceptors,
+ const vector<Input *> 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_usec);
+
+ for (size_t i = 0; i < acceptors.size(); ++i) {
+ state.add_acceptors()->MergeFrom(acceptors[i]->serialize());
+ }
+
+ for (size_t i = 0; i < inputs.size(); ++i) {
+ state.add_inputs()->MergeFrom(inputs[i]->serialize());
+ }
+
+ return state;
+}
+
// Read the state back from the file descriptor made by make_tempfile,
// and close it.
CubemapStateProto read_tempfile(int state_fd)
return state;
}
-
-int main(int argc, char **argv)
+
+// Find all port statements in the configuration file, and create acceptors for htem.
+vector<Acceptor *> create_acceptors(
+ const Config &config,
+ map<int, Acceptor *> *deserialized_acceptors)
{
- fprintf(stderr, "\nCubemap starting.\n");
-
- struct timeval serialize_start;
- bool is_reexec = false;
-
- string config_filename = (argc == 1) ? "cubemap.config" : argv[1];
- vector<ConfigLine> config = parse_config(config_filename);
+ vector<Acceptor *> acceptors;
+ for (unsigned i = 0; i < config.acceptors.size(); ++i) {
+ const AcceptorConfig &acceptor_config = config.acceptors[i];
+ Acceptor *acceptor = NULL;
+ map<int, Acceptor *>::iterator deserialized_acceptor_it =
+ deserialized_acceptors->find(acceptor_config.port);
+ 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.port, TCP_SOCKET);
+ acceptor = new Acceptor(server_sock, acceptor_config.port);
+ }
+ acceptor->run();
+ acceptors.push_back(acceptor);
+ }
- int port = fetch_config_int(config, "port", 1, 65535, PARAMATER_MANDATORY);
- int num_servers = fetch_config_int(config, "num_servers", 1, 20000, PARAMATER_MANDATORY); // Insanely high max limit.
+ // Close all acceptors that are no longer in the configuration file.
+ for (map<int, Acceptor *>::iterator acceptor_it = deserialized_acceptors->begin();
+ acceptor_it != deserialized_acceptors->end();
+ ++acceptor_it) {
+ acceptor_it->second->close_socket();
+ delete acceptor_it->second;
+ }
- servers = new ServerPool(num_servers);
+ return acceptors;
+}
- 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) {
- is_reexec = true;
+// Find all streams in the configuration file, and create inputs for them.
+vector<Input *> create_inputs(const Config &config,
+ map<string, Input *> *deserialized_inputs)
+{
+ vector<Input *> inputs;
+ for (unsigned i = 0; i < config.streams.size(); ++i) {
+ const StreamConfig &stream_config = config.streams[i];
+ if (stream_config.src.empty()) {
+ continue;
+ }
- fprintf(stderr, "Deserializing state from previous process... ");
- int state_fd = atoi(argv[3]);
- CubemapStateProto loaded_state = read_tempfile(state_fd);
+ string stream_id = stream_config.stream_id;
+ string src = stream_config.src;
- serialize_start.tv_sec = loaded_state.serialize_start_sec();
- serialize_start.tv_usec = loaded_state.serialize_start_usec();
-
- // 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());
+ Input *input = NULL;
+ map<string, Input *>::iterator deserialized_input_it =
+ deserialized_inputs->find(stream_id);
+ if (deserialized_input_it != deserialized_inputs->end()) {
+ input = deserialized_input_it->second;
+ 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());
+ input->close_socket();
+ delete input;
+ input = NULL;
+ }
+ deserialized_inputs->erase(deserialized_input_it);
}
-
- // 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));
+ if (input == NULL) {
+ input = create_input(stream_id, src);
+ if (input == NULL) {
+ fprintf(stderr, "ERROR: did not understand URL '%s', clients will not get any data.\n",
+ src.c_str());
+ continue;
+ }
}
+ input->run();
+ inputs.push_back(input);
+ }
+ return inputs;
+}
- // 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 server socket.
- server_sock = loaded_state.server_sock();
- old_port = loaded_state.port();
-
- fprintf(stderr, "done.\n");
+void create_streams(const Config &config,
+ const set<string> &deserialized_stream_ids,
+ map<string, Input *> *deserialized_inputs)
+{
+ vector<MarkPool *> mark_pools; // FIXME: leak
+ for (unsigned i = 0; i < config.mark_pools.size(); ++i) {
+ const MarkPoolConfig &mp_config = config.mark_pools[i];
+ mark_pools.push_back(new MarkPool(mp_config.from, mp_config.to));
}
- // 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);
+ for (unsigned i = 0; i < config.streams.size(); ++i) {
+ const StreamConfig &stream_config = config.streams[i];
+ if (deserialized_stream_ids.count(stream_config.stream_id) == 0) {
+ servers->add_stream(stream_config.stream_id);
}
- 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_config.stream_id);
+
+ if (stream_config.mark_pool != -1) {
+ servers->set_mark_pool(stream_config.stream_id,
+ mark_pools[stream_config.mark_pool]);
}
- expecting_stream_ids.erase(stream_id);
}
// Warn about any servers we've lost.
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);
+ if (deserialized_inputs->count(stream_id) != 0) {
+ delete (*deserialized_inputs)[stream_id];
+ deserialized_inputs->erase(stream_id);
}
}
+}
+
+bool dry_run_config(const std::string &argv0, const std::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:
+ perror("fork()");
+ free(argv0_copy);
+ free(config_filename_copy);
+ return false;
+ case 0:
+ // Child.
+ execlp(argv0_copy, argv0_copy, "--test-config", config_filename_copy, NULL);
+ perror(argv0_copy);
+ _exit(1);
+ default:
+ // Parent.
+ break;
+ }
+
+ free(argv0_copy);
+ free(config_filename_copy);
- // 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;
+ int status;
+ pid_t err;
+ do {
+ err = waitpid(pid, &status, 0);
+ } while (err == -1 && errno == EINTR);
+
+ if (err == -1) {
+ perror("waitpid()");
+ return false;
+ }
+
+ return (WIFEXITED(status) && WEXITSTATUS(status) == 0);
+}
+
+int main(int argc, char **argv)
+{
+ // Parse options.
+ int state_fd = -1;
+ bool test_config = false;
+ for ( ;; ) {
+ static const option long_options[] = {
+ { "state", required_argument, 0, 's' },
+ { "test-config", no_argument, 0, 't' },
+ };
+ int option_index = 0;
+ int c = getopt_long (argc, argv, "s:t", long_options, &option_index);
+
+ if (c == -1) {
+ break;
+ }
+ switch (c) {
+ case 's':
+ state_fd = atoi(optarg);
+ break;
+ case 't':
+ test_config = true;
+ break;
+ default:
+ assert(false);
+ }
}
- if (server_sock == -1) {
- server_sock = create_server_socket(port);
+
+ string config_filename = "cubemap.config";
+ if (optind < argc) {
+ config_filename = argv[optind++];
}
- // See if the user wants stats.
- string stats_file = fetch_config_string(config, "stats_file", PARAMETER_OPTIONAL);
- int stats_interval = fetch_config_int(config, "stats_interval", 1, INT_MAX, PARAMETER_OPTIONAL, -1);
- if (stats_interval != -1 && stats_file.empty()) {
- fprintf(stderr, "WARNING: 'stats_interval' given, but no 'stats_file'. No statistics will be written.\n");
+ Config config;
+ if (!parse_config(config_filename, &config)) {
+ exit(1);
+ }
+ if (test_config) {
+ exit(0);
}
- servers->run();
+start:
+ fprintf(stderr, "\nCubemap " SERVER_VERSION " starting.\n");
+ servers = new ServerPool(config.num_servers);
- pthread_t acceptor_thread;
- pthread_create(&acceptor_thread, NULL, acceptor_thread_run, reinterpret_cast<void *>(server_sock));
+ CubemapStateProto loaded_state;
+ struct timeval serialize_start;
+ set<string> deserialized_stream_ids;
+ map<string, Input *> deserialized_inputs;
+ map<int, Acceptor *> deserialized_acceptors;
+ if (state_fd != -1) {
+ fprintf(stderr, "Deserializing state from previous process... ");
+ loaded_state = read_tempfile(state_fd);
- // 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;
- }
- assert(config[i].arguments.size() == 1);
- string stream_id = config[i].arguments[0];
+ serialize_start.tv_sec = loaded_state.serialize_start_sec();
+ serialize_start.tv_usec = loaded_state.serialize_start_usec();
- 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;
+ // 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());
}
- 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);
- }
- if (input == NULL) {
- input = new Input(stream_id, src);
+ // 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(),
+ create_input(loaded_state.inputs(i))));
+ }
+
+ // Deserialize the acceptors.
+ for (int i = 0; i < loaded_state.acceptors_size(); ++i) {
+ deserialized_acceptors.insert(make_pair(
+ loaded_state.acceptors(i).port(),
+ new Acceptor(loaded_state.acceptors(i))));
}
- input->run();
- inputs.push_back(input);
+
+ fprintf(stderr, "done.\n");
}
+ // Find all streams in the configuration file, and create them.
+ create_streams(config, deserialized_stream_ids, &deserialized_inputs);
+
+ servers->run();
+
+ vector<Acceptor *> acceptors = create_acceptors(config, &deserialized_acceptors);
+ vector<Input *> inputs = create_inputs(config, &deserialized_inputs);
+
// All deserialized inputs should now have been taken care of, one way or the other.
assert(deserialized_inputs.empty());
+
+ // Put back the existing clients. It doesn't matter which server we
+ // allocate them to, so just do round-robin. However, we need to add
+ // them after the mark pools have been set up.
+ for (int i = 0; i < loaded_state.clients_size(); ++i) {
+ servers->add_client_from_serialized(loaded_state.clients(i));
+ }
// Start writing statistics.
- pthread_t stats_thread;
- StatsThreadParameters stats_parameters; // Must live for as long as the stats thread does.
- if (!stats_file.empty()) {
- stats_parameters.stats_file = stats_file;
- stats_parameters.stats_interval = stats_interval;
- pthread_create(&stats_thread, NULL, stats_thread_run, &stats_parameters);
+ StatsThread *stats_thread = NULL;
+ if (!config.stats_file.empty()) {
+ stats_thread = new StatsThread(config.stats_file, config.stats_interval);
+ stats_thread->run();
+ } else if (config.stats_interval != -1) {
+ fprintf(stderr, "WARNING: 'stats_interval' given, but no 'stats_file'. No statistics will be written.\n");
}
signal(SIGHUP, hup);
struct timeval server_start;
gettimeofday(&server_start, NULL);
- if (is_reexec) {
+ 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.
// OK, we've been HUPed. Time to shut down everything, serialize, and re-exec.
gettimeofday(&serialize_start, NULL);
- if (!stats_file.empty()) {
- pthread_kill(stats_thread, SIGHUP);
- if (pthread_join(stats_thread, NULL) == -1) {
- perror("pthread_join");
- exit(1);
- }
+ if (stats_thread != NULL) {
+ stats_thread->stop();
}
- pthread_kill(acceptor_thread, SIGHUP);
- if (pthread_join(acceptor_thread, NULL) == -1) {
- perror("pthread_join");
- exit(1);
+ for (size_t i = 0; i < acceptors.size(); ++i) {
+ acceptors[i]->stop();
}
-
- CubemapStateProto state;
- state.set_serialize_start_sec(serialize_start.tv_sec);
- state.set_serialize_start_usec(serialize_start.tv_usec);
- state.set_server_sock(server_sock);
- state.set_port(port);
-
for (size_t i = 0; i < inputs.size(); ++i) {
inputs[i]->stop();
- state.add_inputs()->MergeFrom(inputs[i]->serialize());
- }
-
- 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));
- }
}
- delete servers;
+ servers->stop();
fprintf(stderr, "Serializing state and re-execing...\n");
- int state_fd = make_tempfile(state);
+ state_fd = make_tempfile(collect_state(
+ serialize_start, acceptors, inputs, servers));
+ delete servers;
+ if (!dry_run_config(argv[0], config_filename)) {
+ fprintf(stderr, "ERROR: %s --test-config failed. Restarting old version instead of new.\n", argv[0]);
+ hupped = false;
+ goto start;
+ }
+
char buf[16];
sprintf(buf, "%d", state_fd);
for ( ;; ) {
- execlp(argv[0], argv[0], config_filename.c_str(), "-state", buf, NULL);
+ 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]);
usleep(200000);
projects / cubemap / blobdiff