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annotate sip-out/main.c @ 268:d6630a2d6e80

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doc: beginning of numbering plan documentation
author Mychaela Falconia <falcon@freecalypso.org>
date Mon, 13 Nov 2023 18:20:57 -0800
parents cb440d003976
children
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1 /*
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2 * Main module for themwi-sip-out.
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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 <sys/errno.h>
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9 #include <netinet/in.h>
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10 #include <stdio.h>
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11 #include <stdlib.h>
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12 #include <string.h>
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13 #include <strings.h>
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14 #include <signal.h>
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15 #include <syslog.h>
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16 #include <unistd.h>
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17 #include "../include/out_routes.h"
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18 #include "call.h"
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19
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20 extern unsigned cfg_retrans_timeout;
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21
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22 extern int mgw_socket, mgw_is_connected;
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23 extern int sip_socket, mncc_listener;
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24 extern struct mncc_conn *mncc_conn_list;
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25
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26 static int max_fd;
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27
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28 struct timeval cur_event_time;
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29
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30 update_max_fd(newfd)
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31 {
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32 if (newfd > max_fd)
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33 max_fd = newfd;
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34 }
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35
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36 main(argc, argv)
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37 char **argv;
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38 {
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39 fd_set fds;
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40 struct mncc_conn *conn, **connp;
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41 int rc, need_retrans, dead_sip_flag;
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42 struct timeval timeout;
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43 time_t dead_sip_time;
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44
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45 openlog("themwi-sip-out", 0, LOG_LOCAL5);
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46 read_config_file();
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47 if (read_number_db() < 0) {
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48 fprintf(stderr, "error reading number database\n");
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49 exit(1);
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50 }
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51 if (read_out_routes_db() < 0) {
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52 fprintf(stderr, "error reading out-routes.bin database\n");
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53 exit(1);
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54 }
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55 if (create_outcall_socket() < 0) {
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56 fprintf(stderr, "error creating outcall socket\n");
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57 exit(1);
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58 }
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59 if (open_sip_udp_socket() < 0) {
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60 fprintf(stderr, "error opening SIP UDP socket\n");
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61 exit(1);
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62 }
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63 if (argv[1]) {
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64 rc = open_sip_log_file(argv[1]);
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65 if (rc < 0)
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66 exit(1); /* error msg already printed */
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67 }
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68 signal(SIGPIPE, SIG_IGN);
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69 /* main select loop */
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70 for (;;) {
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71 FD_ZERO(&fds);
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72 FD_SET(sip_socket, &fds);
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73 FD_SET(mncc_listener, &fds);
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74 if (mgw_is_connected)
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75 FD_SET(mgw_socket, &fds);
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76 for (connp = &mncc_conn_list; conn = *connp; ) {
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77 if (conn->fd < 0) {
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78 *connp = conn->next;
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79 free(conn);
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80 continue;
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81 }
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82 FD_SET(conn->fd, &fds);
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83 connp = &conn->next;
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84 }
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85 need_retrans = dead_sip_flag = 0;
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86 scan_call_list_for_timeouts(&need_retrans, &dead_sip_flag,
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87 &dead_sip_time);
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88 if (need_retrans) {
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89 timeout.tv_sec = cfg_retrans_timeout / 1000;
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90 timeout.tv_usec = (cfg_retrans_timeout % 1000) * 1000;
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91 rc = select(max_fd+1, &fds, 0, 0, &timeout);
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92 } else if (dead_sip_flag) {
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93 if (cur_event_time.tv_sec >= dead_sip_time)
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94 timeout.tv_sec = 0;
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95 else
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96 timeout.tv_sec =
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97 dead_sip_time - cur_event_time.tv_sec;
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98 timeout.tv_usec = 0;
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99 rc = select(max_fd+1, &fds, 0, 0, &timeout);
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100 } else
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101 rc = select(max_fd+1, &fds, 0, 0, 0);
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102 if (rc < 0) {
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103 if (errno == EINTR)
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104 continue;
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105 syslog(LOG_CRIT, "select: %m");
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106 exit(1);
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107 }
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108 gettimeofday(&cur_event_time, 0);
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109 if (rc) {
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110 if (FD_ISSET(mncc_listener, &fds))
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111 mncc_listener_select();
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112 for (conn = mncc_conn_list; conn; conn = conn->next)
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113 if (FD_ISSET(conn->fd, &fds))
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114 mncc_socket_select(conn);
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115 if (FD_ISSET(sip_socket, &fds))
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116 sip_socket_select();
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117 if (mgw_is_connected && FD_ISSET(mgw_socket, &fds))
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118 mgw_socket_select();
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119 } else if (need_retrans)
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120 run_periodic_retrans();
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121 clear_dead_calls();
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122 }
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123 }