+ log(ERROR, "'%s' takes one argument and no parameters", keyword.c_str());
+ return false;
+ }
+ *value = atoi(config[i].arguments[0].c_str()); // TODO: verify int validity.
+ return true;
+ }
+ return false;
+}
+
+bool parse_port(const ConfigLine &line, Config *config)
+{
+ if (line.arguments.size() != 1) {
+ log(ERROR, "'port' takes exactly one argument");
+ return false;
+ }
+
+ int port = atoi(line.arguments[0].c_str());
+ if (port < 1 || port >= 65536) {
+ log(ERROR, "port %d is out of range (must be [1,65536>).", port);
+ return false;
+ }
+
+ AcceptorConfig acceptor;
+ acceptor.addr = CreateAnyAddress(port);
+
+ config->acceptors.push_back(acceptor);
+ return true;
+}
+
+bool parse_listen(const ConfigLine &line, Config *config)
+{
+ if (line.arguments.size() != 1) {
+ log(ERROR, "'listen' takes exactly one argument");
+ return false;
+ }
+
+ string addr_string = line.arguments[0];
+ if (addr_string.empty()) {
+ // Actually, this should never happen.
+ log(ERROR, "'listen' argument cannot be empty");
+ return false;
+ }
+
+ string port_string;
+
+ AcceptorConfig acceptor;
+ memset(&acceptor.addr, 0, sizeof(acceptor.addr));
+ acceptor.addr.sin6_family = AF_INET6;
+ if (addr_string[0] == '[') {
+ // IPv6 address: [addr]:port.
+ size_t addr_end = addr_string.find("]:");
+ if (addr_end == string::npos) {
+ log(ERROR, "IPv6 address '%s' should be on form [address]:port", addr_string.c_str());
+ return false;
+ }
+
+ string addr_only = addr_string.substr(1, addr_end - 1);
+ if (inet_pton(AF_INET6, addr_only.c_str(), &acceptor.addr.sin6_addr) != 1) {
+ log(ERROR, "Invalid IPv6 address '%s'", addr_only.c_str());
+ return false;
+ }
+
+ port_string = addr_string.substr(addr_end + 2);
+ } else {
+ // IPv4 address: addr:port.
+ size_t addr_end = addr_string.find(":");
+ if (addr_end == string::npos) {
+ log(ERROR, "IPv4 address '%s' should be on form address:port", addr_string.c_str());
+ return false;
+ }
+
+ in_addr addr4;
+ string addr_only = addr_string.substr(0, addr_end);
+ if (inet_pton(AF_INET, addr_only.c_str(), &addr4) != 1) {
+ log(ERROR, "Invalid IPv4 address '%s'", addr_only.c_str());
+ return false;
+ }
+
+ // Convert to a v4-mapped address.
+ acceptor.addr.sin6_addr.s6_addr32[2] = htonl(0xffff);
+ acceptor.addr.sin6_addr.s6_addr32[3] = addr4.s_addr;
+ port_string = addr_string.substr(addr_end + 1);
+ }
+
+ int port = atoi(port_string.c_str());
+ if (port < 1 || port >= 65536) {
+ log(ERROR, "port %d is out of range (must be [1,65536>).", port);
+ return false;
+ }
+ acceptor.addr.sin6_port = ntohs(port);
+
+ config->acceptors.push_back(acceptor);
+ return true;
+}
+
+int allocate_mark_pool(int from, int to, Config *config)
+{
+ int pool_index = -1;
+
+ // Reuse mark pools if an identical one exists.
+ // Otherwise, check if we're overlapping some other mark pool.
+ for (size_t i = 0; i < config->mark_pools.size(); ++i) {
+ const MarkPoolConfig &pool = config->mark_pools[i];
+ if (from == pool.from && to == pool.to) {
+ pool_index = i;
+ } else if ((from >= pool.from && from < pool.to) ||
+ (to >= pool.from && to < pool.to)) {
+ log(WARNING, "Mark pool %d-%d partially overlaps with %d-%d, you may get duplicate marks."
+ "Mark pools must either be completely disjunct, or completely overlapping.",
+ from, to, pool.from, pool.to);
+ }
+ }
+
+ if (pool_index != -1) {
+ return pool_index;
+ }
+
+ // No match to existing pools.
+ MarkPoolConfig pool;
+ pool.from = from;
+ pool.to = to;
+ config->mark_pools.push_back(pool);
+
+ return config->mark_pools.size() - 1;
+}
+
+bool parse_mark_pool(const string &mark_str, int *from, int *to)
+{
+ size_t split = mark_str.find_first_of('-');
+ if (split == string::npos) {
+ log(ERROR, "Invalid mark specification '%s' (expected 'X-Y').",
+ mark_str.c_str());
+ return false;
+ }
+
+ string from_str(mark_str.begin(), mark_str.begin() + split);
+ string to_str(mark_str.begin() + split + 1, mark_str.end());
+ *from = atoi(from_str.c_str());
+ *to = atoi(to_str.c_str());
+
+ if (*from <= 0 || *from >= 65536 || *to <= 0 || *to >= 65536) {
+ log(ERROR, "Mark pool range %d-%d is outside legal range [1,65536>.",
+ *from, *to);
+ return false;
+ }
+
+ return true;
+}
+
+bool parse_stream(const ConfigLine &line, Config *config)
+{
+ if (line.arguments.size() != 1) {
+ log(ERROR, "'stream' takes exactly one argument");
+ return false;
+ }
+
+ StreamConfig stream;
+ stream.url = line.arguments[0];
+
+ map<string, string>::const_iterator src_it = line.parameters.find("src");
+ if (src_it == line.parameters.end()) {
+ log(WARNING, "stream '%s' has no src= attribute, clients will not get any data.",
+ stream.url.c_str());
+ } else {
+ stream.src = src_it->second;
+ // TODO: Verify that the URL is parseable?
+ }
+
+ map<string, string>::const_iterator backlog_it = line.parameters.find("backlog_size");
+ if (backlog_it == line.parameters.end()) {
+ stream.backlog_size = DEFAULT_BACKLOG_SIZE;
+ } else {
+ stream.backlog_size = atoi(backlog_it->second.c_str());
+ }
+
+ // Parse encoding.
+ map<string, string>::const_iterator encoding_parm_it = line.parameters.find("encoding");
+ if (encoding_parm_it == line.parameters.end() ||
+ encoding_parm_it->second == "raw") {
+ stream.encoding = StreamConfig::STREAM_ENCODING_RAW;
+ } else if (encoding_parm_it->second == "metacube") {
+ stream.encoding = StreamConfig::STREAM_ENCODING_METACUBE;
+ } else {
+ log(ERROR, "Parameter 'encoding' must be either 'raw' (default) or 'metacube'");
+ return false;
+ }
+
+ // Parse marks, if so desired.
+ map<string, string>::const_iterator mark_parm_it = line.parameters.find("mark");
+ if (mark_parm_it == line.parameters.end()) {
+ stream.mark_pool = -1;
+ } else {
+ int from, to;
+ if (!parse_mark_pool(mark_parm_it->second, &from, &to)) {
+ return false;
+ }
+ stream.mark_pool = allocate_mark_pool(from, to, config);
+ }
+
+ // Parse the pacing rate, converting from kilobits to bytes as needed.
+ map<string, string>::const_iterator pacing_rate_it = line.parameters.find("pacing_rate_kbit");
+ if (pacing_rate_it == line.parameters.end()) {
+ stream.pacing_rate = ~0U;
+ } else {
+ stream.pacing_rate = atoi(pacing_rate_it->second.c_str()) * 1024 / 8;
+ }
+
+ config->streams.push_back(stream);
+ return true;
+}
+
+bool parse_udpstream(const ConfigLine &line, Config *config)
+{
+ if (line.arguments.size() != 1) {
+ log(ERROR, "'udpstream' takes exactly one argument");
+ return false;
+ }
+
+ UDPStreamConfig udpstream;
+
+ string hostport = line.arguments[0];
+
+ // See if the argument if on the type [ipv6addr]:port.
+ if (!hostport.empty() && hostport[0] == '[') {
+ size_t split = hostport.find("]:");
+ if (split == string::npos) {
+ log(ERROR, "udpstream destination '%s' is malformed; must be either [ipv6addr]:port or ipv4addr:port");
+ return false;