+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;
+ }
+
+ string host(hostport.begin() + 1, hostport.begin() + split);
+ string port = hostport.substr(split + 2);
+
+ udpstream.dst.sin6_family = AF_INET6;
+ if (inet_pton(AF_INET6, host.c_str(), &udpstream.dst.sin6_addr) != 1) {
+ log(ERROR, "udpstream destination host '%s' is not a valid IPv6 address");
+ return false;
+ }
+
+ udpstream.dst.sin6_port = htons(atoi(port.c_str())); // TODO: Verify validity.
+ } else {
+ // OK, then it must be ipv4addr:port.
+ 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;
+ }
+
+ string host(hostport.begin(), hostport.begin() + split);
+ string port = hostport.substr(split + 1);
+
+ // Parse to an IPv4 address, then construct a mapped-v4 address from that.
+ in_addr addr4;
+
+ if (inet_pton(AF_INET, host.c_str(), &addr4) != 1) {
+ log(ERROR, "udpstream destination host '%s' is not a valid IPv4 address");
+ return false;
+ }
+
+ udpstream.dst.sin6_family = AF_INET6;
+ udpstream.dst.sin6_addr.s6_addr32[0] = 0;
+ udpstream.dst.sin6_addr.s6_addr32[1] = 0;
+ udpstream.dst.sin6_addr.s6_addr32[2] = htonl(0xffff);
+ udpstream.dst.sin6_addr.s6_addr32[3] = addr4.s_addr;
+ udpstream.dst.sin6_port = htons(atoi(port.c_str())); // TODO: Verify validity.
+ }
+
+ map<string, string>::const_iterator src_it = line.parameters.find("src");
+ if (src_it == line.parameters.end()) {
+ // This is pretty meaningless, but OK, consistency is good.
+ log(WARNING, "udpstream to %s has no src= attribute, clients will not get any data.",
+ hostport.c_str());
+ } else {
+ udpstream.src = src_it->second;
+ // TODO: Verify that the URL is parseable?
+ }
+
+ // Parse marks, if so desired.
+ map<string, string>::const_iterator mark_parm_it = line.parameters.find("mark");
+ if (mark_parm_it == line.parameters.end()) {
+ udpstream.mark_pool = -1;
+ } else {
+ int from, to;
+ if (!parse_mark_pool(mark_parm_it->second, &from, &to)) {
+ return false;
+ }
+ udpstream.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()) {
+ udpstream.pacing_rate = ~0U;
+ } else {
+ udpstream.pacing_rate = atoi(pacing_rate_it->second.c_str()) * 1024 / 8;
+ }
+
+ config->udpstreams.push_back(udpstream);
+ return true;
+}
+