FreeCalypso > hg > themwi-system-sw

annotate sip-manual-out/uas.c @ 155:2730ccb44549

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sip-out: initial UAC response handling
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 11 Oct 2022 23:30:00 -0800
parents b51247739897
children
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1 /*
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2 * UAS for sip-manual-out.
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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 <netinet/in.h>
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8 #include <stdio.h>
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9 #include <stdlib.h>
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10 #include <string.h>
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11 #include <strings.h>
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12 #include "../libsip/parse.h"
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13 #include "../libsip/uas_basic.h"
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14 #include "../libsip/out_msg.h"
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15
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16 static void
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17 unsupported_method(req, ess, sin)
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18 struct sip_pkt_rx *req;
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19 struct uas_parse_hdrs *ess;
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20 struct sockaddr_in *sin;
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21 {
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22 struct sip_msg_out resp;
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23 int rc;
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24
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25 printf("SIP %.16s request: unsupported method\n", req->req_method);
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26 start_response_out_msg(&resp, "501 Method not supported");
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27 rc = add_resp_basic_headers(&resp, ess, req->req_method);
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28 if (rc < 0) {
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29 too_long: fprintf(stderr,
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30 "sending 501 error: response length exceeded\n");
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31 return;
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32 }
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33 rc = out_msg_add_header(&resp, "Allow", "INVITE,ACK,BYE");
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34 if (rc < 0)
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35 goto too_long;
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36 out_msg_finish(&resp);
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37 sip_tx_packet(&resp, sin);
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38 }
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39
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40 void
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41 process_sip_request(msg, sin)
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42 struct sip_pkt_rx *msg;
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43 struct sockaddr_in *sin;
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44 {
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45 struct uas_parse_hdrs ess;
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46 int rc;
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48 rc = uas_get_basic_headers(msg, &ess);
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49 if (rc < 0) {
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50 printf("SIP %.16s request: bad or missing %s header\n",
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51 msg->req_method, ess.error_field);
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52 return;
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53 }
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54 /* dispatch by method */
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55 if (!strcmp(msg->req_method, "INVITE"))
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56 handle_invite_req(msg, &ess, sin);
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57 else if (!strcmp(msg->req_method, "ACK"))
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58 printf("Received ACK request, swallowing it\n");
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59 else if (!strcmp(msg->req_method, "BYE"))
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60 handle_bye_req(msg, &ess, sin);
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61 else
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62 unsupported_method(msg, &ess, sin);
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63 }