FreeCalypso > hg > themwi-system-sw

annotate sip-in/mncc_sock.c @ 105:9213ec8b434b

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sip-in: handle themwi-mncc shutdown without terminating
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 27 Sep 2022 23:00:52 -0800
parents e5aee661e3b2
children 245dc4837b56
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1 /*
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2 * In this module we implement our connection to the MNCC daemon's
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3 * mtcall socket.
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4 */
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6 #include <sys/types.h>
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7 #include <sys/socket.h>
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8 #include <sys/un.h>
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9 #include <stdio.h>
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10 #include <stdint.h>
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11 #include <stdlib.h>
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12 #include <syslog.h>
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13 #include "../include/mncc.h"
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15 static char mtcall_socket_pathname[] = "/var/gsm/mtcall_socket";
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17 int gsm_socket, gsm_is_connected;
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19 connect_gsm_mtcall()
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20 {
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21 struct sockaddr_un sa;
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22 unsigned sa_len;
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23 int rc;
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25 if (gsm_is_connected)
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26 return(0);
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27 gsm_socket = socket(AF_UNIX, SOCK_SEQPACKET, 0);
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28 if (gsm_socket < 0) {
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29 syslog(LOG_CRIT, "socket(AF_UNIX, SOCK_SEQPACKET, 0): %m");
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30 return(-1);
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31 }
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32 fill_sockaddr_un(mtcall_socket_pathname, &sa, &sa_len);
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33 rc = connect(gsm_socket, (struct sockaddr *) &sa, sa_len);
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34 if (rc < 0) {
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35 syslog(LOG_ERR, "connect to %s: %m", mtcall_socket_pathname);
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36 close(gsm_socket);
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37 return(-1);
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38 }
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39 update_max_fd(gsm_socket);
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40 gsm_is_connected = 1;
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41 return(0);
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42 }
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44 void
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45 gsm_socket_select()
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46 {
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47 union mncc_msg msg;
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48 int rc;
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49
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50 rc = recv(gsm_socket, &msg, sizeof msg, 0);
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51 if (rc <= 0) {
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52 syslog(LOG_ERR, "mtcall socket disconnected");
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53 shutdown_gsm_conn();
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54 gsm_is_connected = 0;
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55 }
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56 if (rc < 4) {
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57 syslog(LOG_CRIT, "short read from mtcall socket: %d bytes", rc);
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58 exit(1);
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59 }
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60 msg_from_mncc(&msg, rc);
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61 }
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63 send_mncc_to_gsm(msg, msglen)
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64 union mncc_msg *msg;
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65 unsigned msglen;
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66 {
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67 return send(gsm_socket, msg, msglen, 0);
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68 }