2 * UDP prototype streaming system
3 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard.
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 #include <sys/types.h>
24 #include <sys/socket.h>
25 #include <netinet/in.h>
27 # include <arpa/inet.h>
29 # include "barpainet.h"
33 #ifndef IPV6_ADD_MEMBERSHIP
34 #define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP
35 #define IPV6_DROP_MEMBERSHIP IPV6_LEAVE_GROUP
46 struct sockaddr_in dest_addr;
48 struct sockaddr_storage dest_addr;
53 #define UDP_TX_BUF_SIZE 32768
57 static int udp_ipv6_is_multicast_address(const struct sockaddr *addr) {
58 if (addr->sa_family == AF_INET)
59 return IN_MULTICAST(ntohl(((struct sockaddr_in *)addr)->sin_addr.s_addr));
60 if (addr->sa_family == AF_INET6)
61 return IN6_IS_ADDR_MULTICAST(&((struct sockaddr_in6 *)addr)->sin6_addr);
65 static int udp_ipv6_set_multicast_ttl(int sockfd, int mcastTTL, struct sockaddr *addr) {
66 if (addr->sa_family == AF_INET) {
67 if (setsockopt(sockfd, IPPROTO_IP, IP_MULTICAST_TTL, &mcastTTL, sizeof(mcastTTL)) < 0) {
68 perror("setsockopt(IP_MULTICAST_TTL)");
72 if (addr->sa_family == AF_INET6) {
73 if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, &mcastTTL, sizeof(mcastTTL)) < 0) {
74 perror("setsockopt(IPV6_MULTICAST_HOPS)");
81 static int udp_ipv6_join_multicast_group(int sockfd, struct sockaddr *addr) {
83 struct ipv6_mreq mreq6;
84 if (addr->sa_family == AF_INET) {
85 mreq.imr_multiaddr.s_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
86 mreq.imr_interface.s_addr= INADDR_ANY;
87 if (setsockopt(sockfd, IPPROTO_IP, IP_ADD_MEMBERSHIP, (const void *)&mreq, sizeof(mreq)) < 0) {
88 perror("setsockopt(IP_ADD_MEMBERSHIP)");
92 if (addr->sa_family == AF_INET6) {
93 memcpy(&mreq6.ipv6mr_multiaddr, &(((struct sockaddr_in6 *)addr)->sin6_addr), sizeof(struct in6_addr));
94 mreq6.ipv6mr_interface= 0;
95 if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP, &mreq6, sizeof(mreq6)) < 0) {
96 perror("setsockopt(IPV6_ADD_MEMBERSHIP)");
103 static int udp_ipv6_leave_multicast_group(int sockfd, struct sockaddr *addr) {
105 struct ipv6_mreq mreq6;
106 if (addr->sa_family == AF_INET) {
107 mreq.imr_multiaddr.s_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
108 mreq.imr_interface.s_addr= INADDR_ANY;
109 if (setsockopt(sockfd, IPPROTO_IP, IP_DROP_MEMBERSHIP, (const void *)&mreq, sizeof(mreq)) < 0) {
110 perror("setsockopt(IP_DROP_MEMBERSHIP)");
114 if (addr->sa_family == AF_INET6) {
115 memcpy(&mreq6.ipv6mr_multiaddr, &(((struct sockaddr_in6 *)addr)->sin6_addr), sizeof(struct in6_addr));
116 mreq6.ipv6mr_interface= 0;
117 if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_DROP_MEMBERSHIP, &mreq6, sizeof(mreq6)) < 0) {
118 perror("setsockopt(IPV6_DROP_MEMBERSHIP)");
125 static struct addrinfo* udp_ipv6_resolve_host(const char *hostname, int port, int type, int family, int flags) {
126 struct addrinfo hints, *res = 0;
129 const char *node = 0, *service = 0;
132 snprintf(sport, sizeof(sport), "%d", port);
135 if ((hostname) && (hostname[0] != '\0') && (hostname[0] != '?')) {
138 if ((node) || (service)) {
139 memset(&hints, 0, sizeof(hints));
140 hints.ai_socktype = type;
141 hints.ai_family = family;
142 hints.ai_flags = flags;
143 if ((error = getaddrinfo(node, service, &hints, &res))) {
144 av_log(NULL, AV_LOG_ERROR, "udp_ipv6_resolve_host: %s\n", gai_strerror(error));
150 static int udp_ipv6_set_remote_url(URLContext *h, const char *uri) {
151 UDPContext *s = h->priv_data;
154 struct addrinfo *res0;
155 url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, NULL, 0, uri);
156 res0 = udp_ipv6_resolve_host(hostname, port, SOCK_DGRAM, AF_UNSPEC, 0);
157 if (res0 == 0) return AVERROR_IO;
158 memcpy(&s->dest_addr, res0->ai_addr, res0->ai_addrlen);
159 s->dest_addr_len = res0->ai_addrlen;
164 static int udp_ipv6_set_local(URLContext *h) {
165 UDPContext *s = h->priv_data;
167 struct sockaddr_storage clientaddr;
169 char sbuf[NI_MAXSERV];
170 char hbuf[NI_MAXHOST];
171 struct addrinfo *res0 = NULL, *res = NULL;
173 if (s->local_port != 0) {
174 res0 = udp_ipv6_resolve_host(0, s->local_port, SOCK_DGRAM, AF_UNSPEC, AI_PASSIVE);
177 for (res = res0; res; res=res->ai_next) {
178 udp_fd = socket(res->ai_family, SOCK_DGRAM, 0);
179 if (udp_fd > 0) break;
183 udp_fd = socket(s->dest_addr.ss_family, SOCK_DGRAM, 0);
191 if (s->local_port != 0) {
192 if (bind(udp_fd, res0->ai_addr, res0->ai_addrlen) < 0) {
200 addrlen = sizeof(clientaddr);
201 if (getsockname(udp_fd, (struct sockaddr *)&clientaddr, &addrlen) < 0) {
202 perror("getsockname");
206 if (getnameinfo((struct sockaddr *)&clientaddr, addrlen, hbuf, sizeof(hbuf), sbuf, sizeof(sbuf), NI_NUMERICHOST | NI_NUMERICSERV) != 0) {
207 perror("getnameinfo");
211 s->local_port = strtol(sbuf, NULL, 10);
217 #ifdef CONFIG_BEOS_NETSERVER
231 * If no filename is given to av_open_input_file because you want to
232 * get the local port first, then you must call this function to set
233 * the remote server address.
235 * url syntax: udp://host:port[?option=val...]
236 * option: 'multicast=1' : enable multicast
237 * 'ttl=n' : set the ttl value (for multicast only)
238 * 'localport=n' : set the local port
239 * 'pkt_size=n' : set max packet size
240 * 'reuse=1' : enable reusing the socket
242 * @param s1 media file context
243 * @param uri of the remote server
244 * @return zero if no error.
246 int udp_set_remote_url(URLContext *h, const char *uri)
249 return udp_ipv6_set_remote_url(h, uri);
251 UDPContext *s = h->priv_data;
255 url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, NULL, 0, uri);
257 /* set the destination address */
258 if (resolve_host(&s->dest_addr.sin_addr, hostname) < 0)
260 s->dest_addr.sin_family = AF_INET;
261 s->dest_addr.sin_port = htons(port);
267 * Return the local port used by the UDP connexion
268 * @param s1 media file context
269 * @return the local port number
271 int udp_get_local_port(URLContext *h)
273 UDPContext *s = h->priv_data;
274 return s->local_port;
278 * Return the udp file handle for select() usage to wait for several RTP
279 * streams at the same time.
280 * @param h media file context
282 int udp_get_file_handle(URLContext *h)
284 UDPContext *s = h->priv_data;
288 /* put it in UDP context */
289 /* return non zero if error */
290 static int udp_open(URLContext *h, const char *uri, int flags)
293 int port, udp_fd = -1, tmp;
294 UDPContext *s = NULL;
299 struct sockaddr_in my_addr, my_addr1;
304 h->max_packet_size = 1472;
306 is_output = (flags & URL_WRONLY);
308 s = av_malloc(sizeof(UDPContext));
317 p = strchr(uri, '?');
319 s->is_multicast = find_info_tag(buf, sizeof(buf), "multicast", p);
320 s->reuse_socket = find_info_tag(buf, sizeof(buf), "reuse", p);
321 if (find_info_tag(buf, sizeof(buf), "ttl", p)) {
322 s->ttl = strtol(buf, NULL, 10);
324 if (find_info_tag(buf, sizeof(buf), "localport", p)) {
325 s->local_port = strtol(buf, NULL, 10);
327 if (find_info_tag(buf, sizeof(buf), "pkt_size", p)) {
328 h->max_packet_size = strtol(buf, NULL, 10);
332 /* fill the dest addr */
333 url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, NULL, 0, uri);
335 /* XXX: fix url_split */
336 if (hostname[0] == '\0' || hostname[0] == '?') {
337 /* only accepts null hostname if input */
338 if (s->is_multicast || (flags & URL_WRONLY))
341 udp_set_remote_url(h, uri);
345 udp_fd = socket(PF_INET, SOCK_DGRAM, 0);
349 my_addr.sin_family = AF_INET;
350 my_addr.sin_addr.s_addr = htonl (INADDR_ANY);
351 if (s->is_multicast && !(h->flags & URL_WRONLY)) {
352 /* special case: the bind must be done on the multicast address port */
353 my_addr.sin_port = s->dest_addr.sin_port;
355 my_addr.sin_port = htons(s->local_port);
359 if (setsockopt (udp_fd, SOL_SOCKET, SO_REUSEADDR, &(s->reuse_socket), sizeof(s->reuse_socket)) != 0)
362 /* the bind is needed to give a port to the socket now */
363 if (bind(udp_fd,(struct sockaddr *)&my_addr, sizeof(my_addr)) < 0)
366 len = sizeof(my_addr1);
367 getsockname(udp_fd, (struct sockaddr *)&my_addr1, &len);
368 s->local_port = ntohs(my_addr1.sin_port);
370 #ifndef CONFIG_BEOS_NETSERVER
371 if (s->is_multicast) {
372 if (h->flags & URL_WRONLY) {
374 if (setsockopt(udp_fd, IPPROTO_IP, IP_MULTICAST_TTL,
375 &s->ttl, sizeof(s->ttl)) < 0) {
376 perror("IP_MULTICAST_TTL");
381 memset(&s->mreq, 0, sizeof(s->mreq));
382 s->mreq.imr_multiaddr = s->dest_addr.sin_addr;
383 s->mreq.imr_interface.s_addr = htonl (INADDR_ANY);
384 if (setsockopt(udp_fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
385 &s->mreq, sizeof(s->mreq)) < 0) {
386 perror("rtp: IP_ADD_MEMBERSHIP");
393 if (s->is_multicast && !(h->flags & URL_WRONLY))
394 s->local_port = port;
395 udp_fd = udp_ipv6_set_local(h);
398 #ifndef CONFIG_BEOS_NETSERVER
399 if (s->is_multicast) {
400 if (h->flags & URL_WRONLY) {
401 if (udp_ipv6_set_multicast_ttl(udp_fd, s->ttl, (struct sockaddr *)&s->dest_addr) < 0)
404 if (udp_ipv6_join_multicast_group(udp_fd, (struct sockaddr *)&s->dest_addr) < 0)
412 /* limit the tx buf size to limit latency */
413 tmp = UDP_TX_BUF_SIZE;
414 if (setsockopt(udp_fd, SOL_SOCKET, SO_SNDBUF, &tmp, sizeof(tmp)) < 0) {
415 perror("setsockopt sndbuf");
424 #ifdef CONFIG_BEOS_NETSERVER
433 static int udp_read(URLContext *h, uint8_t *buf, int size)
435 UDPContext *s = h->priv_data;
437 struct sockaddr_in from;
439 struct sockaddr_storage from;
445 from_len = sizeof(from);
446 len = recvfrom (s->udp_fd, buf, size, 0,
447 (struct sockaddr *)&from, &from_len);
449 if (errno != EAGAIN && errno != EINTR)
458 static int udp_write(URLContext *h, uint8_t *buf, int size)
460 UDPContext *s = h->priv_data;
464 ret = sendto (s->udp_fd, buf, size, 0,
465 (struct sockaddr *) &s->dest_addr,
467 sizeof (s->dest_addr));
472 if (errno != EINTR && errno != EAGAIN)
481 static int udp_close(URLContext *h)
483 UDPContext *s = h->priv_data;
485 #ifndef CONFIG_BEOS_NETSERVER
487 if (s->is_multicast && !(h->flags & URL_WRONLY)) {
488 if (setsockopt(s->udp_fd, IPPROTO_IP, IP_DROP_MEMBERSHIP,
489 &s->mreq, sizeof(s->mreq)) < 0) {
490 perror("IP_DROP_MEMBERSHIP");
494 if (s->is_multicast && !(h->flags & URL_WRONLY))
495 udp_ipv6_leave_multicast_group(s->udp_fd, (struct sockaddr *)&s->dest_addr);
499 closesocket(s->udp_fd);
505 URLProtocol udp_protocol = {