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comparison rtp-mgr/alloc.c @ 179:b79d6334f543

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themwi-rtp-mgr: RTP port allocation split out of themwi-mgw
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 11 Mar 2023 20:19:14 -0800
parents mgw/crcx.c@f062c32a5116
children
comparison
equal deleted inserted replaced
178:b259e2722485 179:b79d6334f543
1 /*
2 * In this module we implement our RTP port allocation operation.
3 */
4
5 #include <sys/types.h>
6 #include <sys/socket.h>
7 #include <sys/time.h>
8 #include <netinet/in.h>
9 #include <arpa/inet.h>
10 #include <stdio.h>
11 #include <stdint.h>
12 #include <stdlib.h>
13 #include <string.h>
14 #include <strings.h>
15 #include <syslog.h>
16 #include <unistd.h>
17 #include "../include/tmgw_const.h"
18 #include "struct.h"
19 #include "select.h"
20
21 get_rtp_port_pair(roe, brc)
22 struct rtp_one_end *roe;
23 struct bind_range_cfg *brc;
24 {
25 struct sockaddr_in sin;
26 unsigned tries, rtp_port;
27 int rc;
28
29 sin.sin_family = AF_INET;
30 sin.sin_addr = brc->bind_ip;
31 for (tries = brc->port_tries; tries; tries--) {
32 rtp_port = brc->port_next;
33 brc->port_next += 2;
34 if (brc->port_next >= brc->port_range_end)
35 brc->port_next = brc->port_range_start;
36 sin.sin_port = htons(rtp_port);
37 roe->rtp_fd = socket(AF_INET, SOCK_DGRAM, 0);
38 if (roe->rtp_fd < 0) {
39 syslog(LOG_CRIT, "socket(AF_INET, SOCK_DGRAM, 0): %m");
40 return(-1);
41 }
42 rc = bind(roe->rtp_fd, (struct sockaddr *) &sin, sizeof sin);
43 if (rc < 0) {
44 close(roe->rtp_fd);
45 continue;
46 }
47 bcopy(&sin, &roe->bound_addr, sizeof(struct sockaddr_in));
48 sin.sin_port = htons(rtp_port+1);
49 roe->rtcp_fd = socket(AF_INET, SOCK_DGRAM, 0);
50 if (roe->rtcp_fd < 0) {
51 syslog(LOG_CRIT, "socket(AF_INET, SOCK_DGRAM, 0): %m");
52 close(roe->rtp_fd);
53 return(-1);
54 }
55 rc = bind(roe->rtcp_fd, (struct sockaddr *) &sin, sizeof sin);
56 if (rc < 0) {
57 close(roe->rtp_fd);
58 close(roe->rtcp_fd);
59 continue;
60 }
61 /* all good! */
62 return(0);
63 }
64 /* couldn't find a free port pair */
65 return(-1);
66 }