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 * @file libavformat/udp.c
27 #define _BSD_SOURCE /* Needed for using struct ip_mreq with recent glibc */
31 #include "os_support.h"
33 #include <sys/select.h>
38 #include <frsh_core_types.h>
40 long int udp_budget, udp_period;
49 struct sockaddr_in dest_addr;
52 frsh_send_endpoint_t sepoint;
53 frsh_send_endpoint_t repoint;
55 frsh_send_endpoint_protocol_info_t send_pinfo;
56 frsh_contract_t contract;
57 frsh_contract_label_t label;
58 frsh_rel_time_t budget, period;
61 #define UDP_TX_BUF_SIZE 32768
62 #define UDP_MAX_PKT_SIZE 65536
64 static int udp_set_multicast_ttl(int sockfd, int mcastTTL, struct sockaddr *addr)
69 static int udp_join_multicast_group(int sockfd, struct sockaddr *addr)
74 static int udp_leave_multicast_group(int sockfd, struct sockaddr *addr)
79 static int udp_set_url(struct sockaddr_in *addr, const char *hostname, int port)
81 /* set the destination address */
82 if (resolve_host(&addr->sin_addr, hostname) < 0)
84 addr->sin_family = AF_INET;
85 addr->sin_port = htons(port);
87 return sizeof(struct sockaddr_in);
90 static int is_multicast_address(struct sockaddr_in *addr)
96 udp_socket_create(UDPContext *s, struct sockaddr_in *addr, int *addr_len)
98 static long int netcont_num = 0;
100 char netcont_name[20];
102 addr->sin_family = AF_INET;
103 addr->sin_addr.s_addr = htonl (INADDR_ANY);
104 addr->sin_port = htons(s->local_port);
105 *addr_len = sizeof(struct sockaddr_in);
107 /* set params for contract */
108 frsh_network_bytes_to_budget(FRSH_NETPF_FWP, udp_budget, &s->budget);
109 s->period = fosa_msec_to_rel_time(udp_period);
110 s->send_pinfo.body = NULL;
112 udp_fd = frsh_send_endpoint_create(FRSH_NETPF_FWP,
113 s->dest_addr.sin_addr.s_addr,
114 ntohs(s->dest_addr.sin_port), s->send_pinfo,
121 /* Contract negotiation */
122 ret = frsh_contract_init(&s->contract);
123 //if (ret) PERROR_AND_EXIT(ret, "frsh_contract_init");
126 ret = frsh_contract_set_basic_params(&s->contract,
131 //if (ret) PERROR_AND_EXIT(ret, "frsh_contract_set_basic_params");
133 snprintf(netcont_name, sizeof(netcont_name), "ffmpeg%02d", ++netcont_num);
134 ret = frsh_contract_set_resource_and_label(&s->contract,FRSH_RT_NETWORK,
136 s->label[0] ? s->label : netcont_name);
137 //if (ret) PERROR_AND_EXIT(ret, "frsh_contract_set_resource_and_label");
140 ret = frsh_contract_negotiate(&s->contract, &s->vres);
141 //if (ret) PERROR_AND_EXIT(ret, "frsh_contract_negotiate");
144 printf("Send endpoint created\n");
145 frsh_send_endpoint_bind(s->vres, s->sepoint);
146 printf("Send endpoint bounded\n");
148 //fwp_endpoint_get_params(s->sepoint->protocol_info.body, &node,
149 // &port, &attr, &fd);
154 static int udp_port(struct sockaddr_in *addr, int len)
156 return ntohs(addr->sin_port);
160 * If no filename is given to av_open_input_file because you want to
161 * get the local port first, then you must call this function to set
162 * the remote server address.
164 * url syntax: udp://host:port[?option=val...]
165 * option: 'ttl=n' : set the ttl value (for multicast only)
166 * 'localport=n' : set the local port
167 * 'pkt_size=n' : set max packet size
168 * 'reuse=1' : enable reusing the socket
170 * @param s1 media file context
171 * @param uri of the remote server
172 * @return zero if no error.
174 int udp_set_remote_url(URLContext *h, const char *uri)
176 UDPContext *s = h->priv_data;
180 url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, NULL, 0, uri);
182 /* set the destination address */
183 s->dest_addr_len = udp_set_url(&s->dest_addr, hostname, port);
184 if (s->dest_addr_len < 0) {
187 s->is_multicast = is_multicast_address(&s->dest_addr);
193 * Return the local port used by the UDP connexion
194 * @param s1 media file context
195 * @return the local port number
197 int udp_get_local_port(URLContext *h)
199 UDPContext *s = h->priv_data;
200 return s->local_port;
204 * Return the udp file handle for select() usage to wait for several RTP
205 * streams at the same time.
206 * @param h media file context
208 #if (LIBAVFORMAT_VERSION_MAJOR >= 53)
211 int udp_get_file_handle(URLContext *h)
213 UDPContext *s = h->priv_data;
217 /* put it in UDP context */
218 /* return non zero if error */
219 static int udp_open(URLContext *h, const char *uri, int flags)
222 int port, udp_fd = -1, tmp;
223 UDPContext *s = NULL;
227 struct sockaddr_in my_addr;
231 h->max_packet_size = 1472;
233 is_output = (flags & URL_WRONLY);
235 if(!ff_network_init())
238 s = av_mallocz(sizeof(UDPContext));
240 return AVERROR(ENOMEM);
244 s->buffer_size = is_output ? UDP_TX_BUF_SIZE : UDP_MAX_PKT_SIZE;
246 p = strchr(uri, '?');
248 s->reuse_socket = find_info_tag(buf, sizeof(buf), "reuse", p);
249 if (find_info_tag(buf, sizeof(buf), "ttl", p)) {
250 s->ttl = strtol(buf, NULL, 10);
252 if (find_info_tag(buf, sizeof(buf), "localport", p)) {
253 s->local_port = strtol(buf, NULL, 10);
255 if (find_info_tag(buf, sizeof(buf), "pkt_size", p)) {
256 h->max_packet_size = strtol(buf, NULL, 10);
258 if (find_info_tag(buf, sizeof(buf), "buffer_size", p)) {
259 s->buffer_size = strtol(buf, NULL, 10);
261 if (!find_info_tag(s->label, sizeof(s->label),
262 "contract_label", p)) {
267 /* fill the dest addr */
268 url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, NULL, 0, uri);
270 /* XXX: fix url_split */
271 if (hostname[0] == '\0' || hostname[0] == '?') {
272 /* only accepts null hostname if input */
273 if (flags & URL_WRONLY)
276 udp_set_remote_url(h, uri);
279 udp_fd = udp_socket_create(s, &my_addr, &len);
284 if (setsockopt (udp_fd, SOL_SOCKET, SO_REUSEADDR, &(s->reuse_socket), sizeof(s->reuse_socket)) != 0)
287 /* bind to the local address if not multicast or if the multicast
289 /*if (bind_ret < 0 && bind(udp_fd,(struct sockaddr *)&my_addr, len) < 0)
293 len = sizeof(my_addr);
294 getsockname(udp_fd, (struct sockaddr *)&my_addr, &len);
295 s->local_port = udp_port(&my_addr, len);
298 /* limit the tx buf size to limit latency */
299 tmp = s->buffer_size;
300 if (setsockopt(udp_fd, SOL_SOCKET, SO_SNDBUF, &tmp, sizeof(tmp)) < 0) {
301 av_log(NULL, AV_LOG_ERROR, "setsockopt(SO_SNDBUF): %s\n", strerror(errno));
305 /* set udp recv buffer size to the largest possible udp packet size to
306 * avoid losing data on OSes that set this too low by default. */
307 tmp = s->buffer_size;
308 if (setsockopt(udp_fd, SOL_SOCKET, SO_RCVBUF, &tmp, sizeof(tmp)) < 0) {
309 av_log(NULL, AV_LOG_WARNING, "setsockopt(SO_RECVBUF): %s\n", strerror(errno));
311 /* make the socket non-blocking */
312 ff_socket_nonblock(udp_fd, 1);
324 static int udp_read(URLContext *h, uint8_t *buf, int size)
326 UDPContext *s = h->priv_data;
330 return frsh_receive_sync(s->repoint, buf, size, &len, &from);
333 static int udp_write(URLContext *h, uint8_t *buf, int size)
335 UDPContext *s = h->priv_data;
338 ret = frsh_send_async(s->sepoint, buf, size);
342 static int udp_close(URLContext *h)
344 UDPContext *s = h->priv_data;
347 frsh_send_endpoint_unbind(s->sepoint);
348 ret = frsh_contract_cancel(s->vres);
352 URLProtocol udp_protocol = {
359 .url_get_file_handle = udp_get_file_handle,