6 #include <sys/socket.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);
116 stats.connect_time = time(nullptr);
119 UDPInput::UDPInput(const InputProto &serialized)
120 : url(serialized.url()),
121 sock(serialized.sock())
123 // Should be verified by the caller.
125 bool ok = parse_url(url, &protocol, &user, &host, &port, &path);
131 stats.bytes_received = serialized.bytes_received();
132 stats.data_bytes_received = serialized.data_bytes_received();
133 if (serialized.has_connect_time()) {
134 stats.connect_time = serialized.connect_time();
136 stats.connect_time = time(nullptr);
140 InputProto UDPInput::serialize() const
142 InputProto serialized;
143 serialized.set_url(url);
144 serialized.set_sock(sock);
145 serialized.set_bytes_received(stats.bytes_received);
146 serialized.set_data_bytes_received(stats.data_bytes_received);
147 serialized.set_connect_time(stats.connect_time);
148 serialized.set_is_metacube_encoded(false);
152 void UDPInput::close_socket()
158 void UDPInput::construct_header()
161 "HTTP/1.0 200 OK\r\n"
162 "Content-type: application/octet-stream\r\n"
163 "Cache-control: no-cache\r\n"
164 "Server: " SERVER_IDENTIFICATION "\r\n"
165 "Connection: close\r\n";
168 void UDPInput::add_destination(int stream_index)
170 stream_indices.push_back(stream_index);
171 servers->set_header(stream_index, http_header, "");
174 void UDPInput::do_work()
176 while (!should_stop()) {
178 int port_num = atoi(port.c_str());
179 sockaddr_in6 addr = create_any_address(port_num);
180 sock = create_server_socket(addr, UDP_SOCKET);
182 log(WARNING, "[%s] UDP socket creation failed. Waiting 0.2 seconds and trying again...",
188 // The syntax udp://source@group (abusing the username field
189 // to store the sender in SSM) seems to be a VLC invention.
191 if (!maybe_join_multicast_group(sock, host, user)) {
192 log(WARNING, "[%s] Multicast join failed. Waiting 0.2 seconds and trying again...",
201 // Wait for a packet, or a wakeup.
202 bool activity = wait_for_activity(sock, POLLIN, nullptr);
204 // Most likely, should_stop was set.
210 ret = recv(sock, packet_buf, sizeof(packet_buf), 0);
211 } while (ret == -1 && errno == EINTR);
220 lock_guard<mutex> lock(stats_mutex);
221 stats.bytes_received += ret;
222 stats.data_bytes_received += ret;
225 for (size_t stream_index : stream_indices) {
226 servers->add_data(stream_index, packet_buf, ret, /*metacube_flags=*/0, /*pts=*/RationalPTS());
231 InputStats UDPInput::get_stats() const
233 lock_guard<mutex> lock(stats_mutex);