FreeCalypso > hg > themwi-system-sw

annotate mncc/mncc_sock.c @ 16:4c2000b3aed7

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top Makefile: add mncc
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 26 Jun 2022 16:33:30 -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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14
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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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18
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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 }