#include <sys/epoll.h>
#include <signal.h>
#include <errno.h>
+#include <ctype.h>
#include <vector>
#include <string>
#include <map>
#define NUM_SERVERS 4
#define STREAM_ID "stream"
#define STREAM_URL "http://gruessi.zrh.sesse.net:4013/"
-#define PORT 9094
using namespace std;
return state;
}
+// Split a line on whitespace, e.g. "foo bar baz" -> {"foo", "bar", "baz"}.
+vector<string> split_tokens(const string &line)
+{
+ vector<string> ret;
+ string current_token;
+
+ for (size_t i = 0; i < line.size(); ++i) {
+ if (isspace(line[i])) {
+ if (!current_token.empty()) {
+ ret.push_back(current_token);
+ }
+ current_token.clear();
+ } else {
+ current_token.push_back(line[i]);
+ }
+ }
+ if (!current_token.empty()) {
+ ret.push_back(current_token);
+ }
+ return ret;
+}
+
+struct ConfigLine {
+ string keyword;
+ vector<string> arguments;
+ map<string, string> parameters;
+};
+
+// Parse the configuration file.
+vector<ConfigLine> parse_config(const string &filename)
+{
+ vector<ConfigLine> ret;
+
+ FILE *fp = fopen(filename.c_str(), "r");
+ if (fp == NULL) {
+ perror(filename.c_str());
+ exit(1);
+ }
+
+ char buf[4096];
+ while (!feof(fp)) {
+ if (fgets(buf, sizeof(buf), fp) == NULL) {
+ break;
+ }
+
+ // Chop off the string at the first #, \r or \n.
+ buf[strcspn(buf, "#\r\n")] = 0;
+
+ // Remove all whitespace from the end of the string.
+ size_t len = strlen(buf);
+ while (len > 0 && isspace(buf[len - 1])) {
+ buf[--len] = 0;
+ }
+
+ // If the line is now all blank, ignore it.
+ if (len == 0) {
+ continue;
+ }
+
+ vector<string> tokens = split_tokens(buf);
+ assert(!tokens.empty());
+
+ ConfigLine line;
+ line.keyword = tokens[0];
+
+ for (size_t i = 1; i < tokens.size(); ++i) {
+ // foo=bar is a parameter; anything else is an argument.
+ size_t equals_pos = tokens[i].find_first_of('=');
+ if (equals_pos == string::npos) {
+ line.arguments.push_back(tokens[i]);
+ } else {
+ string key = tokens[i].substr(0, equals_pos);
+ string value = tokens[i].substr(equals_pos + 1, string::npos);
+ line.parameters.insert(make_pair(key, value));
+ }
+ }
+
+ ret.push_back(line);
+ }
+
+ fclose(fp);
+ return ret;
+}
+
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);
+
+ // Go through each (parsed) configuration line.
+ int port = -1;
+ for (unsigned i = 0; i < config.size(); ++i) {
+ if (config[i].keyword == "port") {
+ if (config[i].parameters.size() > 0 ||
+ config[i].arguments.size() != 1) {
+ fprintf(stderr, "ERROR: 'port' takes one argument and no parameters\n");
+ exit(1);
+ }
+ port = atoi(config[i].arguments[0].c_str());
+ }
+ }
+ if (port <= 0 || port > 65535) {
+ fprintf(stderr, "ERROR: Missing or invalid 'port' statement in config file\n");
+ exit(1);
+ }
+
+ // Create the servers.
servers = new Server[NUM_SERVERS];
- int server_sock;
- if (argc == 3 && strcmp(argv[1], "-state") == 0) {
+ int server_sock = -1, old_port = -1;
+ if (argc == 4 && strcmp(argv[2], "-state") == 0) {
fprintf(stderr, "Deserializing state from previous process... ");
- int state_fd = atoi(argv[2]);
+ int state_fd = atoi(argv[3]);
CubemapStateProto loaded_state = read_tempfile(state_fd);
// Deserialize the streams.
// Deserialize the server socket.
server_sock = loaded_state.server_sock();
+ old_port = loaded_state.port();
fprintf(stderr, "done.\n");
- } else {
- // TODO: This should come from a config file.
- server_sock = create_server_socket(PORT);
+ } else{
+ // TODO: This should come from the config file.
for (int i = 0; i < NUM_SERVERS; ++i) {
servers[i].add_stream(STREAM_ID);
}
}
+ // 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;
+ }
+ if (server_sock == -1) {
+ server_sock = create_server_socket(port);
+ }
+
+ // Start up all the servers!
for (int i = 0; i < NUM_SERVERS; ++i) {
servers[i].run();
}
pthread_t acceptor_thread;
pthread_create(&acceptor_thread, NULL, acceptor_thread_run, reinterpret_cast<void *>(server_sock));
+ // TODO: This should come from the config file.
Input input(STREAM_ID, STREAM_URL);
input.run();
CubemapStateProto state;
state.set_server_sock(server_sock);
+ state.set_port(port);
for (int i = 0; i < NUM_SERVERS; ++i) {
servers[i].stop();
sprintf(buf, "%d", state_fd);
for ( ;; ) {
- execlp(argv[0], argv[0], "-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