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annotate smpp-trx-sa/localsock.c @ 271:b54fa3e4d81f

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doc/NANP-specifics: update references to other articles
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 26 Nov 2023 18:14:19 -0800
parents 9d6e8d99d2b1
children
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1 /*
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2 * This module implements the local socket part of smpp-trx-sa.
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3 */
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4
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5 #include <sys/types.h>
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6 #include <sys/socket.h>
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7 #include <sys/un.h>
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8 #include <stdio.h>
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9 #include <stdlib.h>
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10 #include <unistd.h>
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11
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12 int localsock;
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13
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14 void
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15 create_local_socket(pathname)
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16 char *pathname;
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17 {
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18 struct sockaddr_un sa;
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19 unsigned sa_len;
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20 int rc;
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21
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22 localsock = socket(AF_UNIX, SOCK_DGRAM, 0);
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23 if (localsock < 0) {
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24 perror("socket(AF_UNIX, SOCK_DGRAM, 0)");
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25 exit(1);
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26 }
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27 unlink(pathname);
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28 fill_sockaddr_un(pathname, &sa, &sa_len);
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29 rc = bind(localsock, (struct sockaddr *) &sa, sa_len);
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30 if (rc < 0) {
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31 fprintf(stderr, "bind error on %s\n", pathname);
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32 perror("bind");
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33 exit(1);
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34 }
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35 }
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36
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37 void
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38 localsock_select_handler()
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39 {
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40 u_char buf[0x10000];
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41 int cc;
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42 unsigned pdu_len;
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43
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44 cc = recv(localsock, buf, sizeof buf, 0);
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45 if (cc <= 0) {
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46 perror("read from local socket");
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47 log_fatal_error("error reading from local socket");
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48 exit(1);
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49 }
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50 if (cc < 16) {
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51 inv_pdu: log_fatal_error("Received invalid PDU on local socket");
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52 return;
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53 }
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54 if (buf[0] || buf[1])
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55 goto inv_pdu;
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56 pdu_len = (buf[2] << 8) | buf[3];
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57 if (pdu_len != cc)
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58 goto inv_pdu;
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59 send_pdu_from_localsock(buf, pdu_len);
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60 }