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 long int udp_budget, udp_period;
47 struct sockaddr_in dest_addr;
50 frsh_send_endpoint_t sepoint;
51 frsh_send_endpoint_t repoint;
53 frsh_send_endpoint_protocol_info_t send_pinfo;
54 frsh_contract_t contract;
55 frsh_rel_time_t budget, period;
58 #define UDP_TX_BUF_SIZE 32768
59 #define UDP_MAX_PKT_SIZE 65536
61 static int udp_set_multicast_ttl(int sockfd, int mcastTTL, struct sockaddr *addr)
66 static int udp_join_multicast_group(int sockfd, struct sockaddr *addr)
71 static int udp_leave_multicast_group(int sockfd, struct sockaddr *addr)
76 static int udp_set_url(struct sockaddr_in *addr, const char *hostname, int port)
78 /* set the destination address */
79 if (resolve_host(&addr->sin_addr, hostname) < 0)
81 addr->sin_family = AF_INET;
82 addr->sin_port = htons(port);
84 return sizeof(struct sockaddr_in);
87 static int is_multicast_address(struct sockaddr_in *addr)
93 udp_socket_create(UDPContext *s, struct sockaddr_in *addr, int *addr_len)
95 static long int netcont_num = 0;
97 char netcont_name[20];
99 addr->sin_family = AF_INET;
100 addr->sin_addr.s_addr = htonl (INADDR_ANY);
101 addr->sin_port = htons(s->local_port);
102 *addr_len = sizeof(struct sockaddr_in);
104 /* set params for contract */
105 frsh_network_bytes_to_budget(FRSH_NETPF_FWP, udp_budget, &s->budget);
106 s->period = fosa_msec_to_rel_time(udp_period);
107 s->send_pinfo.body = NULL;
109 udp_fd = frsh_send_endpoint_create(FRSH_NETPF_FWP,
110 s->dest_addr.sin_addr.s_addr,
111 ntohs(s->dest_addr.sin_port), s->send_pinfo,
118 /* Contract negotiation */
119 ret = frsh_contract_init(&s->contract);
120 //if (ret) PERROR_AND_EXIT(ret, "frsh_contract_init");
123 ret = frsh_contract_set_basic_params(&s->contract,
128 //if (ret) PERROR_AND_EXIT(ret, "frsh_contract_set_basic_params");
130 snprintf(netcont_name, sizeof(netcont_name), "net_cont%d", ++netcont_num);
131 ret = frsh_contract_set_resource_and_label(&s->contract,FRSH_RT_NETWORK,
132 FRSH_NETPF_FWP, netcont_name);
133 //if (ret) PERROR_AND_EXIT(ret, "frsh_contract_set_resource_and_label");
136 ret = frsh_contract_negotiate(&s->contract, &s->vres);
137 //if (ret) PERROR_AND_EXIT(ret, "frsh_contract_negotiate");
140 printf("Send endpoint created\n");
141 frsh_send_endpoint_bind(s->vres, s->sepoint);
142 printf("Send endpoint bounded\n");
144 //fwp_endpoint_get_params(s->sepoint->protocol_info.body, &node,
145 // &port, &attr, &fd);
150 static int udp_port(struct sockaddr_in *addr, int len)
152 return ntohs(addr->sin_port);
156 * If no filename is given to av_open_input_file because you want to
157 * get the local port first, then you must call this function to set
158 * the remote server address.
160 * url syntax: udp://host:port[?option=val...]
161 * option: 'ttl=n' : set the ttl value (for multicast only)
162 * 'localport=n' : set the local port
163 * 'pkt_size=n' : set max packet size
164 * 'reuse=1' : enable reusing the socket
166 * @param s1 media file context
167 * @param uri of the remote server
168 * @return zero if no error.
170 int udp_set_remote_url(URLContext *h, const char *uri)
172 UDPContext *s = h->priv_data;
176 url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, NULL, 0, uri);
178 /* set the destination address */
179 s->dest_addr_len = udp_set_url(&s->dest_addr, hostname, port);
180 if (s->dest_addr_len < 0) {
183 s->is_multicast = is_multicast_address(&s->dest_addr);
189 * Return the local port used by the UDP connexion
190 * @param s1 media file context
191 * @return the local port number
193 int udp_get_local_port(URLContext *h)
195 UDPContext *s = h->priv_data;
196 return s->local_port;
200 * Return the udp file handle for select() usage to wait for several RTP
201 * streams at the same time.
202 * @param h media file context
204 #if (LIBAVFORMAT_VERSION_MAJOR >= 53)
207 int udp_get_file_handle(URLContext *h)
209 UDPContext *s = h->priv_data;
213 /* put it in UDP context */
214 /* return non zero if error */
215 static int udp_open(URLContext *h, const char *uri, int flags)
218 int port, udp_fd = -1, tmp;
219 UDPContext *s = NULL;
223 struct sockaddr_in my_addr;
227 h->max_packet_size = 1472;
229 is_output = (flags & URL_WRONLY);
231 if(!ff_network_init())
234 s = av_mallocz(sizeof(UDPContext));
236 return AVERROR(ENOMEM);
240 s->buffer_size = is_output ? UDP_TX_BUF_SIZE : UDP_MAX_PKT_SIZE;
242 p = strchr(uri, '?');
244 s->reuse_socket = find_info_tag(buf, sizeof(buf), "reuse", p);
245 if (find_info_tag(buf, sizeof(buf), "ttl", p)) {
246 s->ttl = strtol(buf, NULL, 10);
248 if (find_info_tag(buf, sizeof(buf), "localport", p)) {
249 s->local_port = strtol(buf, NULL, 10);
251 if (find_info_tag(buf, sizeof(buf), "pkt_size", p)) {
252 h->max_packet_size = strtol(buf, NULL, 10);
254 if (find_info_tag(buf, sizeof(buf), "buffer_size", p)) {
255 s->buffer_size = strtol(buf, NULL, 10);
259 /* fill the dest addr */
260 url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, NULL, 0, uri);
262 /* XXX: fix url_split */
263 if (hostname[0] == '\0' || hostname[0] == '?') {
264 /* only accepts null hostname if input */
265 if (flags & URL_WRONLY)
268 udp_set_remote_url(h, uri);
271 udp_fd = udp_socket_create(s, &my_addr, &len);
276 if (setsockopt (udp_fd, SOL_SOCKET, SO_REUSEADDR, &(s->reuse_socket), sizeof(s->reuse_socket)) != 0)
279 /* bind to the local address if not multicast or if the multicast
281 /*if (bind_ret < 0 && bind(udp_fd,(struct sockaddr *)&my_addr, len) < 0)
285 len = sizeof(my_addr);
286 getsockname(udp_fd, (struct sockaddr *)&my_addr, &len);
287 s->local_port = udp_port(&my_addr, len);
290 /* limit the tx buf size to limit latency */
291 tmp = s->buffer_size;
292 if (setsockopt(udp_fd, SOL_SOCKET, SO_SNDBUF, &tmp, sizeof(tmp)) < 0) {
293 av_log(NULL, AV_LOG_ERROR, "setsockopt(SO_SNDBUF): %s\n", strerror(errno));
297 /* set udp recv buffer size to the largest possible udp packet size to
298 * avoid losing data on OSes that set this too low by default. */
299 tmp = s->buffer_size;
300 if (setsockopt(udp_fd, SOL_SOCKET, SO_RCVBUF, &tmp, sizeof(tmp)) < 0) {
301 av_log(NULL, AV_LOG_WARNING, "setsockopt(SO_RECVBUF): %s\n", strerror(errno));
303 /* make the socket non-blocking */
304 ff_socket_nonblock(udp_fd, 1);
316 static int udp_read(URLContext *h, uint8_t *buf, int size)
318 UDPContext *s = h->priv_data;
322 return frsh_receive_sync(s->repoint, buf, size, &len, &from);
325 static int udp_write(URLContext *h, uint8_t *buf, int size)
327 UDPContext *s = h->priv_data;
330 ret = frsh_send_async(s->sepoint, buf, size);
334 static int udp_close(URLContext *h)
336 UDPContext *s = h->priv_data;
339 ret1 = frsh_send_endpoint_destroy(s->sepoint);
340 ret2 = frsh_receive_endpoint_destroy(s->repoint);
341 return (ret1 || ret2);
344 URLProtocol udp_protocol = {
351 .url_get_file_handle = udp_get_file_handle,