FreeCalypso > hg > themwi-system-sw

annotate sip-manual-out/reinvite.c @ 178:b259e2722485

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README: update for current status
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 09 Mar 2023 13:08:31 -0800
parents b51247739897
children
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1 /*
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2 * Here we handle incoming INVITE requests in the UAS role: even though
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3 * we are strictly outbound, BulkVS servers will send us periodic
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4 * re-INVITEs as keepalives, and we have to play along.
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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 <netinet/in.h>
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10 #include <stdio.h>
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11 #include <stdlib.h>
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12 #include <string.h>
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13 #include <strings.h>
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14 #include "../libsip/parse.h"
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15 #include "../libsip/uas_basic.h"
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16 #include "../libsip/out_msg.h"
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17
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18 extern char call_id[];
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19
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20 static void
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21 invite_correct_call(req, ess, sin)
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22 struct sip_pkt_rx *req;
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23 struct uas_parse_hdrs *ess;
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24 struct sockaddr_in *sin;
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25 {
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26 struct sip_msg_out resp;
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27 int rc;
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29 printf("Received re-INVITE for our call, responding with 200\n");
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30 start_response_out_msg(&resp, "200 OK");
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31 rc = add_resp_basic_headers(&resp, ess, req->req_method);
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32 if (rc < 0) {
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33 fprintf(stderr, "sending 200 response: msg length exceeded\n");
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34 return;
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35 }
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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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40 static void
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41 invite_unknown_call(req, ess, sin)
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42 struct sip_pkt_rx *req;
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43 struct uas_parse_hdrs *ess;
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44 struct sockaddr_in *sin;
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45 {
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46 struct sip_msg_out resp;
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47 int rc;
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49 printf("Received INVITE for unknown call, responding with 405\n");
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50 start_response_out_msg(&resp, "405 This gateway is outbound only");
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51 rc = add_resp_basic_headers(&resp, ess, req->req_method);
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52 if (rc < 0) {
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53 fprintf(stderr, "sending 405 response: msg length exceeded\n");
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54 return;
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55 }
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56 out_msg_finish(&resp);
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57 sip_tx_packet(&resp, sin);
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58 }
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59
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60 void
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61 handle_invite_req(req, ess, sin)
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62 struct sip_pkt_rx *req;
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63 struct uas_parse_hdrs *ess;
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64 struct sockaddr_in *sin;
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65 {
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66 if (!strcmp(ess->call_id, call_id))
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67 invite_correct_call(req, ess, sin);
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68 else
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69 invite_unknown_call(req, ess, sin);
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70 }