FreeCalypso > hg > themwi-rtp-mgr

annotate rtp-mgr/alloc.c @ 8:7e2b24fc097b

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add README and INSTALL
author Mychaela Falconia <falcon@freecalypso.org>
date Mon, 27 May 2024 22:09:00 +0000
parents 247f4bbde24c
children
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1 /*
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2 * In this module we implement our RTP port allocation operation.
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3 */
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4
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5 #include <sys/types.h>
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6 #include <sys/socket.h>
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7 #include <sys/time.h>
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8 #include <netinet/in.h>
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9 #include <arpa/inet.h>
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10 #include <stdio.h>
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11 #include <stdint.h>
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12 #include <stdlib.h>
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13 #include <string.h>
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14 #include <strings.h>
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15 #include <syslog.h>
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16 #include <unistd.h>
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17 #include "struct.h"
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18
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19 get_rtp_port_pair(roe, brc)
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20 struct rtp_one_end *roe;
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21 struct bind_range_cfg *brc;
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22 {
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23 struct sockaddr_in sin;
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24 unsigned tries, rtp_port;
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25 int rc;
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26
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27 sin.sin_family = AF_INET;
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28 sin.sin_addr = brc->bind_ip;
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29 for (tries = brc->port_tries; tries; tries--) {
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30 rtp_port = brc->port_next;
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31 brc->port_next += 2;
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32 if (brc->port_next >= brc->port_range_end)
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33 brc->port_next = brc->port_range_start;
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34 sin.sin_port = htons(rtp_port);
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35 roe->rtp_fd = socket(AF_INET, SOCK_DGRAM, 0);
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36 if (roe->rtp_fd < 0) {
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37 syslog(LOG_CRIT, "socket(AF_INET, SOCK_DGRAM, 0): %m");
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38 return(-1);
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39 }
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40 rc = bind(roe->rtp_fd, (struct sockaddr *) &sin, sizeof sin);
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41 if (rc < 0) {
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42 close(roe->rtp_fd);
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43 continue;
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44 }
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45 bcopy(&sin, &roe->bound_addr, sizeof(struct sockaddr_in));
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46 sin.sin_port = htons(rtp_port+1);
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47 roe->rtcp_fd = socket(AF_INET, SOCK_DGRAM, 0);
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48 if (roe->rtcp_fd < 0) {
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49 syslog(LOG_CRIT, "socket(AF_INET, SOCK_DGRAM, 0): %m");
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50 close(roe->rtp_fd);
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51 return(-1);
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52 }
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53 rc = bind(roe->rtcp_fd, (struct sockaddr *) &sin, sizeof sin);
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54 if (rc < 0) {
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55 close(roe->rtp_fd);
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56 close(roe->rtcp_fd);
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57 continue;
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58 }
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59 /* all good! */
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60 return(0);
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61 }
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62 /* couldn't find a free port pair */
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63 return(-1);
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64 }