9 #include <sys/socket.h>
22 #define DEFAULT_BACKLOG_SIZE 10485760
26 vector<string> arguments;
27 map<string, string> parameters;
32 bool parse_hostport(const string &hostport, sockaddr_in6 *addr)
34 memset(addr, 0, sizeof(*addr));
35 addr->sin6_family = AF_INET6;
39 // See if the argument if on the type [ipv6addr]:port.
40 if (!hostport.empty() && hostport[0] == '[') {
41 size_t split = hostport.find("]:");
42 if (split == string::npos) {
43 log(ERROR, "address '%s' is malformed; must be either [ipv6addr]:port or ipv4addr:port");
47 string host(hostport.begin() + 1, hostport.begin() + split);
48 port_string = hostport.substr(split + 2);
50 if (inet_pton(AF_INET6, host.c_str(), &addr->sin6_addr) != 1) {
51 log(ERROR, "'%s' is not a valid IPv6 address");
55 // OK, then it must be ipv4addr:port.
56 size_t split = hostport.find(":");
57 if (split == string::npos) {
58 log(ERROR, "address '%s' is malformed; must be either [ipv6addr]:port or ipv4addr:port");
62 string host(hostport.begin(), hostport.begin() + split);
63 port_string = hostport.substr(split + 1);
65 // Parse to an IPv4 address, then construct a mapped-v4 address from that.
68 if (inet_pton(AF_INET, host.c_str(), &addr4) != 1) {
69 log(ERROR, "'%s' is not a valid IPv4 address");
73 addr->sin6_addr.s6_addr32[2] = htonl(0xffff);
74 addr->sin6_addr.s6_addr32[3] = addr4.s_addr;
77 int port = atoi(port_string.c_str());
78 if (port < 1 || port >= 65536) {
79 log(ERROR, "port %d is out of range (must be [1,65536>).", port);
82 addr->sin6_port = ntohs(port);
87 bool read_config(const string &filename, vector<ConfigLine> *lines)
89 FILE *fp = fopen(filename.c_str(), "r");
91 log_perror(filename.c_str());
97 if (fgets(buf, sizeof(buf), fp) == NULL) {
101 // Chop off the string at the first #, \r or \n.
102 buf[strcspn(buf, "#\r\n")] = 0;
104 // Remove all whitespace from the end of the string.
105 size_t len = strlen(buf);
106 while (len > 0 && isspace(buf[len - 1])) {
110 // If the line is now all blank, ignore it.
115 vector<string> tokens = split_tokens(buf);
116 assert(!tokens.empty());
119 line.keyword = tokens[0];
121 for (size_t i = 1; i < tokens.size(); ++i) {
122 // foo=bar is a parameter; anything else is an argument.
123 size_t equals_pos = tokens[i].find_first_of('=');
124 if (equals_pos == string::npos) {
125 line.arguments.push_back(tokens[i]);
127 string key = tokens[i].substr(0, equals_pos);
128 string value = tokens[i].substr(equals_pos + 1, string::npos);
129 line.parameters.insert(make_pair(key, value));
133 lines->push_back(line);
136 if (fclose(fp) == EOF) {
137 log_perror(filename.c_str());
143 bool fetch_config_string(const vector<ConfigLine> &config, const string &keyword, string *value)
145 for (unsigned i = 0; i < config.size(); ++i) {
146 if (config[i].keyword != keyword) {
149 if (config[i].parameters.size() > 0 ||
150 config[i].arguments.size() != 1) {
151 log(ERROR, "'%s' takes one argument and no parameters", keyword.c_str());
154 *value = config[i].arguments[0];
160 bool fetch_config_int(const vector<ConfigLine> &config, const string &keyword, int *value)
162 for (unsigned i = 0; i < config.size(); ++i) {
163 if (config[i].keyword != keyword) {
166 if (config[i].parameters.size() > 0 ||
167 config[i].arguments.size() != 1) {
168 log(ERROR, "'%s' takes one argument and no parameters", keyword.c_str());
171 *value = atoi(config[i].arguments[0].c_str()); // TODO: verify int validity.
177 bool parse_port(const ConfigLine &line, Config *config)
179 if (line.arguments.size() != 1) {
180 log(ERROR, "'port' takes exactly one argument");
184 int port = atoi(line.arguments[0].c_str());
185 if (port < 1 || port >= 65536) {
186 log(ERROR, "port %d is out of range (must be [1,65536>).", port);
190 AcceptorConfig acceptor;
191 acceptor.addr = create_any_address(port);
193 config->acceptors.push_back(acceptor);
197 bool parse_listen(const ConfigLine &line, Config *config)
199 if (line.arguments.size() != 1) {
200 log(ERROR, "'listen' takes exactly one argument");
204 AcceptorConfig acceptor;
205 if (!parse_hostport(line.arguments[0], &acceptor.addr)) {
208 config->acceptors.push_back(acceptor);
212 bool parse_stream(const ConfigLine &line, Config *config)
214 if (line.arguments.size() != 1) {
215 log(ERROR, "'stream' takes exactly one argument");
220 stream.url = line.arguments[0];
222 map<string, string>::const_iterator src_it = line.parameters.find("src");
223 if (src_it == line.parameters.end()) {
224 log(WARNING, "stream '%s' has no src= attribute, clients will not get any data.",
227 stream.src = src_it->second;
228 // TODO: Verify that the URL is parseable?
231 map<string, string>::const_iterator backlog_it = line.parameters.find("backlog_size");
232 if (backlog_it == line.parameters.end()) {
233 stream.backlog_size = DEFAULT_BACKLOG_SIZE;
235 stream.backlog_size = atoi(backlog_it->second.c_str());
238 map<string, string>::const_iterator prebuffer_it = line.parameters.find("force_prebuffer");
239 if (prebuffer_it == line.parameters.end()) {
240 stream.prebuffering_bytes = 0;
242 stream.prebuffering_bytes = atoi(prebuffer_it->second.c_str());
245 // Parse output encoding.
246 map<string, string>::const_iterator encoding_parm_it = line.parameters.find("encoding");
247 if (encoding_parm_it == line.parameters.end() ||
248 encoding_parm_it->second == "raw") {
249 stream.encoding = StreamConfig::STREAM_ENCODING_RAW;
250 } else if (encoding_parm_it->second == "metacube") {
251 stream.encoding = StreamConfig::STREAM_ENCODING_METACUBE;
253 log(ERROR, "Parameter 'encoding' must be either 'raw' (default) or 'metacube'");
257 // Parse input encoding.
258 map<string, string>::const_iterator src_encoding_parm_it = line.parameters.find("src_encoding");
259 if (src_encoding_parm_it == line.parameters.end() ||
260 src_encoding_parm_it->second == "metacube") {
261 stream.src_encoding = StreamConfig::STREAM_ENCODING_METACUBE;
262 } else if (src_encoding_parm_it->second == "raw") {
263 stream.src_encoding = StreamConfig::STREAM_ENCODING_RAW;
265 log(ERROR, "Parameter 'src_encoding' must be either 'raw' or 'metacube' (default)");
269 // Parse the pacing rate, converting from kilobits to bytes as needed.
270 map<string, string>::const_iterator pacing_rate_it = line.parameters.find("pacing_rate_kbit");
271 if (pacing_rate_it == line.parameters.end()) {
272 stream.pacing_rate = ~0U;
274 stream.pacing_rate = atoi(pacing_rate_it->second.c_str()) * 1024 / 8;
277 config->streams.push_back(stream);
281 bool parse_udpstream(const ConfigLine &line, Config *config)
283 if (line.arguments.size() != 1) {
284 log(ERROR, "'udpstream' takes exactly one argument");
288 UDPStreamConfig udpstream;
290 string hostport = line.arguments[0];
291 if (!parse_hostport(hostport, &udpstream.dst)) {
295 map<string, string>::const_iterator src_it = line.parameters.find("src");
296 if (src_it == line.parameters.end()) {
297 // This is pretty meaningless, but OK, consistency is good.
298 log(WARNING, "udpstream to %s has no src= attribute, clients will not get any data.",
301 udpstream.src = src_it->second;
302 // TODO: Verify that the URL is parseable?
305 // Parse the pacing rate, converting from kilobits to bytes as needed.
306 map<string, string>::const_iterator pacing_rate_it = line.parameters.find("pacing_rate_kbit");
307 if (pacing_rate_it == line.parameters.end()) {
308 udpstream.pacing_rate = ~0U;
310 udpstream.pacing_rate = atoi(pacing_rate_it->second.c_str()) * 1024 / 8;
313 // Parse the TTL. The same value is used for unicast and multicast.
314 map<string, string>::const_iterator ttl_it = line.parameters.find("ttl");
315 if (ttl_it == line.parameters.end()) {
318 udpstream.ttl = atoi(ttl_it->second.c_str());
321 // Parse the multicast interface index.
322 map<string, string>::const_iterator multicast_iface_it = line.parameters.find("multicast_output_interface");
323 if (multicast_iface_it == line.parameters.end()) {
324 udpstream.multicast_iface_index = -1;
326 udpstream.multicast_iface_index = if_nametoindex(multicast_iface_it->second.c_str());
327 if (udpstream.multicast_iface_index == 0) {
328 log(ERROR, "Interface '%s' does not exist", multicast_iface_it->second.c_str());
333 config->udpstreams.push_back(udpstream);
337 bool parse_gen204(const ConfigLine &line, Config *config)
339 if (line.arguments.size() != 1) {
340 log(ERROR, "'gen204' takes exactly one argument");
345 gen204.url = line.arguments[0];
347 // Parse the CORS origin, if it exists.
348 map<string, string>::const_iterator allow_origin_it = line.parameters.find("allow_origin");
349 if (allow_origin_it != line.parameters.end()) {
350 gen204.allow_origin = allow_origin_it->second;
353 config->pings.push_back(gen204);
357 bool parse_error_log(const ConfigLine &line, Config *config)
359 if (line.arguments.size() != 0) {
360 log(ERROR, "'error_log' takes no arguments (only parameters type= and filename=)");
364 LogConfig log_config;
365 map<string, string>::const_iterator type_it = line.parameters.find("type");
366 if (type_it == line.parameters.end()) {
367 log(ERROR, "'error_log' has no type= parameter");
371 string type = type_it->second;
372 if (type == "file") {
373 log_config.type = LogConfig::LOG_TYPE_FILE;
374 } else if (type == "syslog") {
375 log_config.type = LogConfig::LOG_TYPE_SYSLOG;
376 } else if (type == "console") {
377 log_config.type = LogConfig::LOG_TYPE_CONSOLE;
379 log(ERROR, "Unknown log type '%s'", type.c_str());
383 if (log_config.type == LogConfig::LOG_TYPE_FILE) {
384 map<string, string>::const_iterator filename_it = line.parameters.find("filename");
385 if (filename_it == line.parameters.end()) {
386 log(ERROR, "error_log type 'file' with no filename= parameter");
389 log_config.filename = filename_it->second;
392 config->log_destinations.push_back(log_config);
398 bool parse_config(const string &filename, Config *config)
400 vector<ConfigLine> lines;
401 if (!read_config(filename, &lines)) {
405 config->daemonize = false;
407 if (!fetch_config_int(lines, "num_servers", &config->num_servers)) {
408 log(ERROR, "Missing 'num_servers' statement in config file.");
411 if (config->num_servers < 1 || config->num_servers >= 20000) { // Insanely high max limit.
412 log(ERROR, "'num_servers' is %d, needs to be in [1, 20000>.", config->num_servers);
416 // See if the user wants stats.
417 config->stats_interval = 60;
418 bool has_stats_file = fetch_config_string(lines, "stats_file", &config->stats_file);
419 bool has_stats_interval = fetch_config_int(lines, "stats_interval", &config->stats_interval);
420 if (has_stats_interval && !has_stats_file) {
421 log(WARNING, "'stats_interval' given, but no 'stats_file'. No client statistics will be written.");
424 config->input_stats_interval = 60;
425 bool has_input_stats_file = fetch_config_string(lines, "input_stats_file", &config->input_stats_file);
426 bool has_input_stats_interval = fetch_config_int(lines, "input_stats_interval", &config->input_stats_interval);
427 if (has_input_stats_interval && !has_input_stats_file) {
428 log(WARNING, "'input_stats_interval' given, but no 'input_stats_file'. No input statistics will be written.");
431 fetch_config_string(lines, "access_log", &config->access_log_file);
433 for (size_t i = 0; i < lines.size(); ++i) {
434 const ConfigLine &line = lines[i];
435 if (line.keyword == "num_servers" ||
436 line.keyword == "stats_file" ||
437 line.keyword == "stats_interval" ||
438 line.keyword == "input_stats_file" ||
439 line.keyword == "input_stats_interval" ||
440 line.keyword == "access_log") {
441 // Already taken care of, above.
442 } else if (line.keyword == "port") {
443 if (!parse_port(line, config)) {
446 } else if (line.keyword == "listen") {
447 if (!parse_listen(line, config)) {
450 } else if (line.keyword == "stream") {
451 if (!parse_stream(line, config)) {
454 } else if (line.keyword == "udpstream") {
455 if (!parse_udpstream(line, config)) {
458 } else if (line.keyword == "gen204") {
459 if (!parse_gen204(line, config)) {
462 } else if (line.keyword == "error_log") {
463 if (!parse_error_log(line, config)) {
466 } else if (line.keyword == "daemonize") {
467 config->daemonize = true;
469 log(ERROR, "Unknown configuration keyword '%s'.",
470 line.keyword.c_str());