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annotate mncc/mtsock.c @ 15:ccc5ab6d8388

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first version of themwi-mncc for ThemWi2
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 26 Jun 2022 16:31:47 -0800
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children fd43f179ff1d
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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/socket.h>
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9 #include <sys/un.h>
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10 #include <stdio.h>
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11 #include <stdint.h>
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12 #include <stdlib.h>
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13 #include <string.h>
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14 #include <strings.h>
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15 #include <syslog.h>
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16 #include "../include/mncc.h"
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17 #include "struct.h"
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18
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19 static char mtcall_socket_pathname[] = "/var/gsm/mtcall_socket";
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20
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21 int mtcall_listener;
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22 struct socket_conn *mtcall_socket_head;
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23
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24 create_mtcall_socket()
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25 {
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26 struct sockaddr_un sa;
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27 unsigned sa_len;
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28 int rc;
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29
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30 mtcall_listener = socket(AF_UNIX, SOCK_SEQPACKET, 0);
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31 if (mtcall_listener < 0) {
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32 syslog(LOG_CRIT, "socket(AF_UNIX, SOCK_SEQPACKET, 0): %m");
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33 return(-1);
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34 }
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35 unlink(mtcall_socket_pathname);
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36 fill_sockaddr_un(mtcall_socket_pathname, &sa, &sa_len);
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37 rc = bind(mtcall_listener, (struct sockaddr *) &sa, sa_len);
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38 if (rc < 0) {
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39 syslog(LOG_ERR, "bind to %s: %m", mtcall_socket_pathname);
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40 return(-1);
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41 }
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42 rc = listen(mtcall_listener, 3);
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43 if (rc < 0) {
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44 syslog(LOG_CRIT, "listen on UNIX socket: %m");
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45 return(-1);
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46 }
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47 update_max_fd(mtcall_listener);
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48 return(0);
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49 }
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50
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51 void
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52 mtsock_accept_handler()
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53 {
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54 struct sockaddr_un sa;
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55 socklen_t sa_len;
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56 int fd;
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57 struct socket_conn *conn;
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58
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59 fd = accept(mtcall_listener, (struct sockaddr *) &sa, &sa_len);
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60 if (fd < 0) {
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61 syslog(LOG_CRIT, "accept on UNIX socket: %m");
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62 exit(1);
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63 }
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64 conn = malloc(sizeof(struct socket_conn));
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65 if (!conn) {
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66 syslog(LOG_CRIT, "malloc for mtcall socket conn: %m");
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67 close(fd);
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68 return;
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69 }
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70 bzero(conn, sizeof(struct socket_conn));
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71 conn->fd = fd;
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72 conn->next = mtcall_socket_head;
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73 mtcall_socket_head = conn;
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74 update_max_fd(fd);
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75 }