FreeCalypso > hg > themwi-system-sw

annotate sip-in/main.c @ 95:f280328e7e2e

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themwi-mgw: initial implementation of PSTN to GSM forwarding
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 25 Sep 2022 19:17:44 -0800
parents 709b78a4ebf0
children 372209628038
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1 /*
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2 * Main module for themwi-sip-in.
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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/time.h>
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7 #include <sys/errno.h>
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8 #include <stdio.h>
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9 #include <stdlib.h>
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10 #include <string.h>
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11 #include <strings.h>
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12 #include <signal.h>
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13 #include <syslog.h>
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14 #include <unistd.h>
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15
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16 extern unsigned cfg_retrans_timeout;
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17
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18 extern int mgw_socket, sip_socket;
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19 extern int gsm_socket, gsm_is_connected;
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20
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21 static int max_fd;
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22
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23 struct timeval cur_event_time;
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24
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25 update_max_fd(newfd)
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26 {
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27 if (newfd > max_fd)
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28 max_fd = newfd;
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29 }
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30
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31 main(argc, argv)
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32 char **argv;
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33 {
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34 fd_set fds;
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35 int rc, need_retrans;
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36 struct timeval timeout;
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37
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38 openlog("themwi-sip-in", 0, LOG_LOCAL5);
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39 read_config_file();
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40 if (read_number_db() < 0) {
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41 fprintf(stderr, "error reading number database\n");
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42 exit(1);
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43 }
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44 if (open_tmgw_socket() < 0) {
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45 fprintf(stderr, "error connecting to themwi-mgw socket\n");
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46 exit(1);
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47 }
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48 if (open_sip_udp_socket() < 0) {
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49 fprintf(stderr, "error opening SIP UDP socket\n");
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50 exit(1);
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51 }
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52 if (argv[1]) {
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53 rc = open_sip_log_file(argv[1]);
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54 if (rc < 0)
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55 exit(1); /* error msg already printed */
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56 }
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57 signal(SIGPIPE, SIG_IGN);
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58 /* main select loop */
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59 for (;;) {
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60 FD_ZERO(&fds);
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61 FD_SET(mgw_socket, &fds);
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62 FD_SET(sip_socket, &fds);
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63 if (gsm_is_connected)
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64 FD_SET(gsm_socket, &fds);
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65 need_retrans = 0;
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66 scan_call_list_for_timeouts(&need_retrans);
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67 if (need_retrans) {
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68 timeout.tv_sec = cfg_retrans_timeout / 1000;
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69 timeout.tv_usec = (cfg_retrans_timeout % 1000) * 1000;
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70 rc = select(max_fd+1, &fds, 0, 0, &timeout);
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71 } else
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72 rc = select(max_fd+1, &fds, 0, 0, 0);
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73 if (rc < 0) {
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74 if (errno == EINTR)
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75 continue;
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76 syslog(LOG_CRIT, "select: %m");
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77 exit(1);
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78 }
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79 gettimeofday(&cur_event_time, 0);
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80 if (rc == 0) {
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81 run_periodic_retrans();
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82 continue;
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83 }
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84 if (gsm_is_connected && FD_ISSET(gsm_socket, &fds))
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85 gsm_socket_select();
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86 if (FD_ISSET(sip_socket, &fds))
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87 sip_socket_select();
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88 if (FD_ISSET(mgw_socket, &fds))
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89 mgw_socket_select();
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90 }
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91 }