FreeCalypso > hg > themwi-system-sw

annotate sip-in/sip_uas.c @ 69:8cf85edca543

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sip-in: implement SIP ACK handling
author Mychaela Falconia <falcon@freecalypso.org>
date Mon, 19 Sep 2022 14:55:57 -0800
parents 02761f1ae5e5
children b0df2b200d77
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1 /*
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2 * Basic UAS functions for themwi-sip-in.
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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 <syslog.h>
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13 #include "../libsip/parse.h"
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14 #include "../libsip/uas_basic.h"
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15 #include "../libsip/out_msg.h"
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16
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17 static void
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18 method_tbi(req, ess, sin)
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19 struct sip_pkt_rx *req;
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20 struct uas_parse_hdrs *ess;
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21 struct sockaddr_in *sin;
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22 {
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23 syslog(LOG_ERR, "SIP method %s remains to be implemented",
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24 req->req_method);
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25 }
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26
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27 static void
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28 unsupported_method(req, ess, sin)
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29 struct sip_pkt_rx *req;
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30 struct uas_parse_hdrs *ess;
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31 struct sockaddr_in *sin;
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32 {
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33 struct sip_msg_out resp;
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34 int rc;
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35
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36 start_response_out_msg(&resp, "501 Method not supported");
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37 rc = add_resp_basic_headers(&resp, ess, req->req_method);
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38 if (rc < 0) {
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39 too_long: syslog(LOG_ERR, "sending 501 error: response length exceeded");
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40 return;
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41 }
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42 rc = out_msg_add_header(&resp, "Allow", "INVITE,ACK,CANCEL,BYE");
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43 if (rc < 0)
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44 goto too_long;
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45 out_msg_finish(&resp);
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46 sip_tx_packet(&resp, sin);
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47 }
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48
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49 void
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50 process_sip_request(msg, sin)
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51 struct sip_pkt_rx *msg;
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52 struct sockaddr_in *sin;
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53 {
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54 struct uas_parse_hdrs ess;
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55 int rc;
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56
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57 rc = uas_get_basic_headers(msg, &ess);
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58 if (rc < 0) {
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59 syslog(LOG_ERR, "SIP %.16s request: bad or missing %s header",
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60 msg->req_method, ess.error_field);
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61 return;
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62 }
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63 /* dispatch by method */
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64 if (!strcmp(msg->req_method, "INVITE"))
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65 handle_sip_invite(msg, &ess, sin);
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66 else if (!strcmp(msg->req_method, "ACK"))
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67 handle_sip_ack(msg, &ess, sin);
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68 else if (!strcmp(msg->req_method, "CANCEL"))
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69 method_tbi(msg, &ess, sin);
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70 else if (!strcmp(msg->req_method, "BYE"))
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71 method_tbi(msg, &ess, sin);
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72 else
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73 unsupported_method(msg, &ess, sin);
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74 }