FreeCalypso > hg > themwi-system-sw
annotate sip-in/mncc_sock.c @ 68:709b78a4ebf0
sip-in: implement retransmission of INVITE responses
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sun, 18 Sep 2022 21:56:20 -0800 |
parents | e5aee661e3b2 |
children | 9213ec8b434b |
rev | line source |
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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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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 mtcall_socket_pathname[] = "/var/gsm/mtcall_socket"; |
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16 |
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17 int gsm_socket, gsm_is_connected; |
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18 |
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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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43 |
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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_CRIT, "error reading from mtcall socket: %m"); |
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53 /* GSM disconnect handling to be implemented */ |
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54 exit(1); |
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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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62 |
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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 } |