FreeCalypso > hg > themwi-system-sw

annotate sip-in/mncc_sock.c @ 124:7e04d28fae8b

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sip-in: default use-100rel to no BulkVS servers act badly when we send a reliable 180 Ringing response to an incoming call, even though they advertise 100rel support in the Supported header in the INVITE packet, and we probably won't be implementing 100rel for outbound because doing per-the-spec PRACK as a UAC is just too burdensome. Therefore, we need to consider 100rel extension as not-really-supported in themwi-system-sw.
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 01 Oct 2022 15:54:50 -0800
parents 245dc4837b56
children
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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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24
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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 close(gsm_socket);
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54 gsm_is_connected = 0;
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55 shutdown_gsm_conn();
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56 return;
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57 }
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58 if (rc < 4) {
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59 syslog(LOG_CRIT, "short read from mtcall socket: %d bytes", rc);
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60 exit(1);
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61 }
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62 msg_from_mncc(&msg, rc);
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63 }
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65 send_mncc_to_gsm(msg, msglen)
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66 union mncc_msg *msg;
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67 unsigned msglen;
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68 {
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69 return send(gsm_socket, msg, msglen, 0);
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70 }