2 * UDP prototype streaming system
3 * Copyright (c) 2000 Gerard Lantau.
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 #include <sys/types.h>
22 #include <sys/socket.h>
23 #include <netinet/in.h>
24 #include <arpa/inet.h>
29 int max_payload_size; /* in bytes */
32 #define UDP_TX_BUF_SIZE 32768
34 /* put it in UDP context */
35 static struct sockaddr_in dest_addr;
37 /* return non zero if error */
38 static int udp_open(URLContext *h, const char *uri, int flags)
41 struct sockaddr_in my_addr;
44 int port, udp_socket, tmp;
50 if (!(flags & URL_WRONLY))
53 /* fill the dest addr */
55 if (!strstart(p, "udp:", &p))
60 memcpy(hostname, p, q - p);
61 hostname[q - p] = '\0';
62 port = strtol(q+1, NULL, 10);
66 dest_addr.sin_family = AF_INET;
67 dest_addr.sin_port = htons(port);
68 if ((inet_aton(hostname, &dest_addr.sin_addr)) == 0) {
69 hp = gethostbyname(hostname);
72 memcpy ((char *) &dest_addr.sin_addr, hp->h_addr, hp->h_length);
75 udp_socket = socket(PF_INET, SOCK_DGRAM, 0);
79 my_addr.sin_family = AF_INET;
80 my_addr.sin_port = htons(local_port);
81 my_addr.sin_addr.s_addr = htonl (INADDR_ANY);
83 /* the bind is needed to give a port to the socket now */
84 if (bind(udp_socket,(struct sockaddr *)&my_addr, sizeof(my_addr)) < 0)
87 /* limit the tx buf size to limit latency */
89 tmp = UDP_TX_BUF_SIZE;
90 if (setsockopt(udp_socket, SOL_SOCKET, SO_SNDBUF, &tmp, sizeof(tmp)) < 0) {
91 perror("setsockopt sndbuf");
95 s = malloc(sizeof(UDPContext));
99 s->udp_socket = udp_socket;
100 h->packet_size = 1500;
106 int udp_close(URLContext *h)
108 UDPContext *s = h->priv_data;
109 close(s->udp_socket);
113 int udp_write(URLContext *h, UINT8 *buf, int size)
115 UDPContext *s = h->priv_data;
118 /* primitive way to avoid big packets */
122 if (len > h->packet_size)
123 len = h->packet_size;
125 ret = sendto (s->udp_socket, buf, len, 0,
126 (struct sockaddr *) &dest_addr,
136 URLProtocol udp_protocol = {