6 #include <sys/socket.h>
13 #include "mutexlock.h"
14 #include "serverpool.h"
23 extern ServerPool *servers;
27 // Similar to parse_hostport(), but only parses the IP address,
28 // and does not use mapped-v4 addresses, since multicast seems
29 // to not like that too much.
30 bool parse_ip_address(const string &ip, sockaddr_storage *addr)
32 memset(addr, 0, sizeof(*addr));
36 sockaddr_in6 *addr6 = (sockaddr_in6 *)addr;
37 addr6->sin6_family = AF_INET6;
38 if (ip[ip.size() - 1] != ']') {
39 log(ERROR, "address '%s' is malformed; must be either [ipv6addr] or ipv4addr",
43 string raw_ip(ip.begin() + 1, ip.end() - 1);
44 if (inet_pton(AF_INET6, raw_ip.c_str(), &addr6->sin6_addr) != 1) {
45 log(ERROR, "'%s' is not a valid IPv6 address", raw_ip.c_str());
49 sockaddr_in *addr4 = (sockaddr_in *)addr;
50 addr4->sin_family = AF_INET;
51 if (inet_pton(AF_INET, ip.c_str(), &addr4->sin_addr) != 1) {
52 log(ERROR, "'%s' is not a valid IPv4 address");
60 bool maybe_join_multicast_group(int sock, const string &group, const string &source)
67 // Join the given multicast group (ASM or SSM).
68 // TODO: Also support sources apart from multicast groups,
69 // e.g. udp://[::1]:1234 for only receiving from localhost.
70 if (!source.empty()) {
71 // Single-Source Multicast (SSM).
73 memset(&gsr, 0, sizeof(gsr));
74 if (!parse_ip_address(group, &gsr.gsr_group)) {
77 if (!parse_ip_address(source, &gsr.gsr_source)) {
80 int level = (gsr.gsr_group.ss_family == AF_INET) ? SOL_IP : SOL_IPV6;
81 if (setsockopt(sock, level, MCAST_JOIN_SOURCE_GROUP, &gsr, sizeof(gsr)) == -1) {
82 log_perror("setsockopt(MCAST_JOIN_SOURCE_GROUP)");
86 // Any-Source Multicast (ASM).
88 memset(&gr, 0, sizeof(gr));
89 if (!parse_ip_address(group, &gr.gr_group)) {
92 int level = (gr.gr_group.ss_family == AF_INET) ? SOL_IP : SOL_IPV6;
93 if (setsockopt(sock, level, MCAST_JOIN_GROUP, &gr, sizeof(gr)) == -1) {
94 log_perror("setsockopt(MCAST_JOIN_GROUP)");
104 UDPInput::UDPInput(const string &url)
108 // Should be verified by the caller.
110 bool ok = parse_url(url, &protocol, &user, &host, &port, &path);
115 pthread_mutex_init(&stats_mutex, NULL);
117 stats.bytes_received = 0;
118 stats.data_bytes_received = 0;
119 stats.connect_time = time(NULL);
122 UDPInput::UDPInput(const InputProto &serialized)
123 : url(serialized.url()),
124 sock(serialized.sock())
126 // Should be verified by the caller.
128 bool ok = parse_url(url, &protocol, &user, &host, &port, &path);
133 pthread_mutex_init(&stats_mutex, NULL);
135 stats.bytes_received = serialized.bytes_received();
136 stats.data_bytes_received = serialized.data_bytes_received();
137 if (serialized.has_connect_time()) {
138 stats.connect_time = serialized.connect_time();
140 stats.connect_time = time(NULL);
144 InputProto UDPInput::serialize() const
146 InputProto serialized;
147 serialized.set_url(url);
148 serialized.set_sock(sock);
149 serialized.set_bytes_received(stats.bytes_received);
150 serialized.set_data_bytes_received(stats.data_bytes_received);
151 serialized.set_connect_time(stats.connect_time);
155 void UDPInput::close_socket()
161 void UDPInput::construct_header()
164 "HTTP/1.0 200 OK\r\n"
165 "Content-type: application/octet-stream\r\n"
166 "Cache-control: no-cache\r\n"
167 "Server: " SERVER_IDENTIFICATION "\r\n"
168 "Connection: close\r\n";
171 void UDPInput::add_destination(int stream_index)
173 stream_indices.push_back(stream_index);
174 servers->set_header(stream_index, http_header, "");
177 void UDPInput::do_work()
179 while (!should_stop()) {
181 int port_num = atoi(port.c_str());
182 sockaddr_in6 addr = create_any_address(port_num);
183 sock = create_server_socket(addr, UDP_SOCKET);
185 log(WARNING, "[%s] UDP socket creation failed. Waiting 0.2 seconds and trying again...",
191 // The syntax udp://source@group (abusing the username field
192 // to store the sender in SSM) seems to be a VLC invention.
194 if (!maybe_join_multicast_group(sock, host, user)) {
195 log(WARNING, "[%s] Multicast join failed. Waiting 0.2 seconds and trying again...",
204 // Wait for a packet, or a wakeup.
205 bool activity = wait_for_activity(sock, POLLIN, NULL);
207 // Most likely, should_stop was set.
213 ret = recv(sock, packet_buf, sizeof(packet_buf), 0);
214 } while (ret == -1 && errno == EINTR);
223 MutexLock lock(&stats_mutex);
224 stats.bytes_received += ret;
225 stats.data_bytes_received += ret;
228 for (size_t i = 0; i < stream_indices.size(); ++i) {
229 servers->add_data(stream_indices[i], packet_buf, ret, SUITABLE_FOR_STREAM_START);
234 InputStats UDPInput::get_stats() const
236 MutexLock lock(&stats_mutex);