FreeCalypso > hg > themwi-system-sw
annotate mncc/mtsock.c @ 63:e5aee661e3b2
sip-in: beginning to handle incoming MNCC messages from themwi-mncc
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sun, 18 Sep 2022 15:01:11 -0800 |
parents | db7ed6a55ba4 |
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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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22 |
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23 int mtcall_listener; |
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24 struct socket_conn *mtcall_socket_head; |
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25 |
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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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31 |
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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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53 |
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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 } |