FreeCalypso > hg > themwi-system-sw

annotate mncc/mtsock.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 db7ed6a55ba4
children
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1 /*
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2 * In this module we implement the MT call socket
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3 * to which other ThemWi system sw components connect
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4 * in order to send MT calls toward the GSM network.
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5 */
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6
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7 #include <sys/types.h>
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8 #include <sys/stat.h>
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9 #include <sys/socket.h>
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10 #include <sys/un.h>
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11 #include <stdio.h>
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12 #include <stdint.h>
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13 #include <stdlib.h>
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14 #include <string.h>
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15 #include <strings.h>
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16 #include <syslog.h>
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17 #include <unistd.h>
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18 #include "../include/mncc.h"
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19 #include "struct.h"
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20
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21 static char mtcall_socket_pathname[] = "/var/gsm/mtcall_socket";
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23 int mtcall_listener;
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24 struct socket_conn *mtcall_socket_head;
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26 create_mtcall_socket()
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27 {
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28 struct sockaddr_un sa;
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29 unsigned sa_len;
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30 int rc;
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32 mtcall_listener = socket(AF_UNIX, SOCK_SEQPACKET, 0);
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33 if (mtcall_listener < 0) {
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34 syslog(LOG_CRIT, "socket(AF_UNIX, SOCK_SEQPACKET, 0): %m");
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35 return(-1);
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36 }
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37 unlink(mtcall_socket_pathname);
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38 fill_sockaddr_un(mtcall_socket_pathname, &sa, &sa_len);
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39 rc = bind(mtcall_listener, (struct sockaddr *) &sa, sa_len);
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40 if (rc < 0) {
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41 syslog(LOG_ERR, "bind to %s: %m", mtcall_socket_pathname);
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42 return(-1);
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43 }
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44 rc = listen(mtcall_listener, 3);
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45 if (rc < 0) {
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46 syslog(LOG_CRIT, "listen on UNIX socket: %m");
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47 return(-1);
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48 }
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49 chmod(mtcall_socket_pathname, 0775);
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50 update_max_fd(mtcall_listener);
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51 return(0);
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52 }
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54 void
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55 mtsock_accept_handler()
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56 {
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57 struct sockaddr_un sa;
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58 socklen_t sa_len;
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59 int fd;
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60 struct socket_conn *conn;
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61
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62 sa_len = sizeof sa;
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63 fd = accept(mtcall_listener, (struct sockaddr *) &sa, &sa_len);
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64 if (fd < 0) {
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65 syslog(LOG_CRIT, "accept on UNIX socket: %m");
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66 exit(1);
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67 }
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68 conn = malloc(sizeof(struct socket_conn));
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69 if (!conn) {
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70 syslog(LOG_CRIT, "malloc for mtcall socket conn: %m");
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71 close(fd);
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72 return;
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73 }
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74 syslog(LOG_INFO, "new MT call socket connection");
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75 bzero(conn, sizeof(struct socket_conn));
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76 conn->fd = fd;
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77 conn->next = mtcall_socket_head;
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78 mtcall_socket_head = conn;
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79 update_max_fd(fd);
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80 }