FreeCalypso > hg > themwi-system-sw

annotate mncc/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 ccc5ab6d8388
children
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1 /*
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2 * In this module we implement low-level handling
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3 * of the main MNCC socket that connects to OsmoMSC.
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4 */
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5
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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 mncc_socket_pathname[] = "/var/gsm/mncc_socket";
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16
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17 int mncc_socket;
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19 open_mncc_socket()
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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 mncc_socket = socket(AF_UNIX, SOCK_SEQPACKET, 0);
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26 if (mncc_socket < 0) {
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27 syslog(LOG_CRIT, "socket(AF_UNIX, SOCK_SEQPACKET, 0): %m");
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28 return(-1);
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29 }
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30 fill_sockaddr_un(mncc_socket_pathname, &sa, &sa_len);
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31 rc = connect(mncc_socket, (struct sockaddr *) &sa, sa_len);
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32 if (rc < 0) {
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33 syslog(LOG_ERR, "connect to %s: %m", mncc_socket_pathname);
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34 return(-1);
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35 }
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36 update_max_fd(mncc_socket);
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37 return(0);
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38 }
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39
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40 void
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41 mncc_socket_select()
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42 {
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43 union mncc_msg msg;
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44 int rc;
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45
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46 rc = recv(mncc_socket, &msg, sizeof msg, 0);
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47 if (rc < 0) {
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48 syslog(LOG_CRIT, "error reading from MNCC socket: %m");
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49 exit(1);
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50 }
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51 if (rc < 4) {
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52 syslog(LOG_CRIT, "short read from MNCC socket: %d bytes", rc);
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53 exit(1);
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54 }
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55 mncc_msg_from_gsm(&msg, rc);
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56 }
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57
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58 send_mncc_to_gsm(msg, msglen)
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59 union mncc_msg *msg;
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60 unsigned msglen;
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61 {
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62 return send(mncc_socket, msg, msglen, 0);
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63 }