FreeCalypso > hg > themwi-system-sw

annotate sip-out/mncc_sock.c @ 164:baaa6c1a3d3b

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sip-out shutdown handling: always do check_dead_call()
author Mychaela Falconia <falcon@freecalypso.org>
date Wed, 12 Oct 2022 16:31:15 -0800
parents e54b0a9e322f
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2 * In this module we implement the MNCC socket interface to themwi-sip-out.
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3 * We have an outcall socket on which we accept connections, and each
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4 * accepted connection becomes a struct mncc_conn for us.
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5 */
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7 #include <sys/types.h>
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8 #include <sys/stat.h>
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9 #include <sys/socket.h>
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10 #include <sys/un.h>
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11 #include <sys/time.h>
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12 #include <netinet/in.h>
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13 #include <stdio.h>
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14 #include <stdint.h>
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15 #include <stdlib.h>
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16 #include <string.h>
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17 #include <strings.h>
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18 #include <syslog.h>
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19 #include <unistd.h>
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20 #include "../include/mncc.h"
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21 #include "../include/out_routes.h"
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22 #include "call.h"
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24 static char outcall_socket_pathname[] = "/var/gsm/outcall_socket";
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26 int mncc_listener;
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27 struct mncc_conn *mncc_conn_list;
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29 create_outcall_socket()
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30 {
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31 struct sockaddr_un sa;
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32 unsigned sa_len;
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33 int rc;
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34
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35 mncc_listener = socket(AF_UNIX, SOCK_SEQPACKET, 0);
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36 if (mncc_listener < 0) {
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37 syslog(LOG_CRIT, "socket(AF_UNIX, SOCK_SEQPACKET, 0): %m");
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38 return(-1);
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39 }
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40 unlink(outcall_socket_pathname);
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41 fill_sockaddr_un(outcall_socket_pathname, &sa, &sa_len);
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42 rc = bind(mncc_listener, (struct sockaddr *) &sa, sa_len);
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43 if (rc < 0) {
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44 syslog(LOG_ERR, "bind to %s: %m", outcall_socket_pathname);
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45 return(-1);
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46 }
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47 rc = listen(mncc_listener, 3);
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48 if (rc < 0) {
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49 syslog(LOG_CRIT, "listen on UNIX socket: %m");
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50 return(-1);
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51 }
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52 chmod(outcall_socket_pathname, 0775);
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53 update_max_fd(mncc_listener);
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54 return(0);
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55 }
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57 void
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58 mncc_listener_select()
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59 {
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60 struct sockaddr_un sa;
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61 socklen_t sa_len;
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62 int fd;
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63 struct mncc_conn *conn;
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64
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65 sa_len = sizeof sa;
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66 fd = accept(mncc_listener, (struct sockaddr *) &sa, &sa_len);
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67 if (fd < 0) {
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68 syslog(LOG_CRIT, "accept on UNIX socket: %m");
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69 exit(1);
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70 }
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71 conn = malloc(sizeof(struct mncc_conn));
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72 if (!conn) {
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73 syslog(LOG_CRIT, "malloc for outcall socket conn: %m");
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74 close(fd);
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75 return;
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76 }
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77 syslog(LOG_INFO, "new outcall socket connection");
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78 conn->fd = fd;
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79 conn->next = mncc_conn_list;
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80 mncc_conn_list = conn;
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81 update_max_fd(fd);
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82 }
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83
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84 static void
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85 dispatch_mncc_msg(mncc, msg, msglen)
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86 struct mncc_conn *mncc;
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87 union mncc_msg *msg;
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88 unsigned msglen;
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89 {
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90 switch (msg->msg_type) {
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91 case MNCC_SETUP_IND:
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92 handle_setup_ind(mncc, msg, msglen);
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93 return;
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94 case MNCC_SETUP_COMPL_IND:
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95 case MNCC_NOTIFY_IND:
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96 case MNCC_DISC_IND:
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97 case MNCC_FACILITY_IND:
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98 case MNCC_START_DTMF_IND:
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99 case MNCC_STOP_DTMF_IND:
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100 case MNCC_MODIFY_IND:
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101 case MNCC_HOLD_IND:
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102 case MNCC_RETRIEVE_IND:
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103 case MNCC_USERINFO_IND:
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104 case MNCC_REL_IND:
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105 case MNCC_REL_CNF:
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106 handle_mncc_signal(mncc, msg, msglen);
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107 return;
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108 case MNCC_RTP_CREATE:
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109 handle_rtp_create(mncc, msg, msglen);
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110 return;
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111 case MNCC_RTP_CONNECT:
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112 syslog(LOG_ERR, "MNCC_RTP_CONNECT error from OsmoMSC");
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113 return;
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114 case MNCC_RTP_FREE:
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115 syslog(LOG_ERR, "MNCC_RTP_FREE bogon from OsmoMSC");
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116 return;
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117 default:
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118 syslog(LOG_CRIT,
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119 "FATAL: received unexpected MNCC message type 0x%x",
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120 msg->msg_type);
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121 exit(1);
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122 }
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123 }
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124
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125 void
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126 mncc_socket_select(conn)
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127 struct mncc_conn *conn;
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128 {
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129 union mncc_msg msg;
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130 int rc;
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131
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132 rc = recv(conn->fd, &msg, sizeof msg, 0);
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133 if (rc <= 0) {
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134 syslog(LOG_ERR, "outcall socket disconnected");
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135 close(conn->fd);
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136 conn->fd = -1;
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137 shutdown_mncc_socket(conn);
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138 return;
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139 }
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140 if (rc < 4) {
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141 syslog(LOG_CRIT, "short read from MNCC socket: %d bytes", rc);
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142 exit(1);
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143 }
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144 dispatch_mncc_msg(conn, &msg, rc);
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145 }
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146
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147 send_mncc_to_sock(mncc, msg, msglen)
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148 struct mncc_conn *mncc;
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149 union mncc_msg *msg;
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150 unsigned msglen;
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151 {
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152 return send(mncc->fd, msg, msglen, 0);
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153 }