FreeCalypso > hg > themwi-system-sw

annotate sip-manual-out/dummy_rtp.c @ 72:9ca6f0708237

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libsip: add extract_to_tag() function
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 20 Sep 2022 10:54:10 -0800
parents d74b545a3c2a
children
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1 /*
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2 * In this module we implement the code that connects to themwi-mgw
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3 * and obtains a dummy PSTN-side RTP endpoint.
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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 <netinet/in.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 "../include/tmgw_ctrl.h"
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16 #include "../include/tmgw_const.h"
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17
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18 struct sockaddr_in dummy_rtp_endp;
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19
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20 static char tmgw_socket_pathname[] = "/var/gsm/tmgw_socket";
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21
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22 obtain_dummy_rtp()
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23 {
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24 struct sockaddr_un sa;
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25 unsigned sa_len;
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26 int fd, rc;
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27 struct tmgw_ctrl_req req;
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28 struct tmgw_ctrl_resp resp;
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29
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30 fd = socket(AF_UNIX, SOCK_SEQPACKET, 0);
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31 if (fd < 0) {
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32 perror("socket(AF_UNIX, SOCK_SEQPACKET, 0)");
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33 exit(1);
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34 }
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35 fill_sockaddr_un(tmgw_socket_pathname, &sa, &sa_len);
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36 rc = connect(fd, (struct sockaddr *) &sa, sa_len);
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37 if (rc < 0) {
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38 perror(tmgw_socket_pathname);
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39 exit(1);
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40 }
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41 bzero(&req, sizeof req);
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42 req.opcode = TMGW_CTRL_OP_CRCX;
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43 req.ep_id = TMGW_EP_TYPE_DUMMY_PSTN;
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44 rc = send(fd, &req, sizeof req, 0);
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45 if (rc < 0) {
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46 perror("send to TMGW socket");
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47 exit(1);
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48 }
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49 rc = recv(fd, &resp, sizeof resp, 0);
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50 if (rc < 0) {
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51 perror("recv from TMGW socket");
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52 exit(1);
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53 }
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54 if (rc != sizeof resp) {
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55 fprintf(stderr,
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56 "error: response packet from TMGW has wrong length (%d bytes)\n",
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57 rc);
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58 exit(1);
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59 }
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60 if (resp.res != TMGW_RESP_OK) {
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61 fprintf(stderr, "TMGW CRCX returned error %u\n", resp.res);
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62 exit(1);
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63 }
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64 bcopy(&resp.pstn_addr, &dummy_rtp_endp, sizeof(struct sockaddr_in));
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65 return(0);
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66 }