FreeCalypso > hg > themwi-system-sw
annotate sip-in/sip_uas.c @ 51:36a30349b490
sip-in: parse INVITE From header
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Wed, 07 Sep 2022 17:53:10 -0800 |
parents | 8117d8ee44a5 |
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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 <unistd.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 static void |
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19 method_tbi(req, ess, sin) |
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20 struct sip_pkt_rx *req; |
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21 struct uas_parse_hdrs *ess; |
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22 struct sockaddr_in *sin; |
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23 { |
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24 syslog(LOG_ERR, "SIP method %s remains to be implemented", |
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25 req->req_method); |
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26 } |
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27 |
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28 static void |
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29 unsupported_method(req, ess, sin) |
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30 struct sip_pkt_rx *req; |
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31 struct uas_parse_hdrs *ess; |
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32 struct sockaddr_in *sin; |
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33 { |
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34 struct sip_msg_out resp; |
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35 int rc; |
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36 |
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37 start_response_out_msg(&resp, "501 Method not supported"); |
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38 rc = add_resp_basic_headers(&resp, ess, req->req_method); |
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39 if (rc < 0) { |
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40 too_long: syslog(LOG_ERR, "sending 501 error: response length exceeded"); |
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41 return; |
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42 } |
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43 rc = out_msg_add_header(&resp, "Allow", "INVITE,ACK,CANCEL,BYE"); |
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44 if (rc < 0) |
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45 goto too_long; |
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46 out_msg_finish(&resp); |
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47 sip_tx_packet(&resp, sin); |
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48 } |
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49 |
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50 void |
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51 process_sip_request(msg, sin) |
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52 struct sip_pkt_rx *msg; |
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53 struct sockaddr_in *sin; |
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54 { |
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55 struct uas_parse_hdrs ess; |
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56 int rc; |
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57 |
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58 rc = uas_get_basic_headers(msg, &ess); |
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59 if (rc < 0) { |
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60 syslog(LOG_ERR, "SIP %.16s request: bad or missing %s header", |
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61 msg->req_method, ess.error_field); |
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62 return; |
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63 } |
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64 /* dispatch by method */ |
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65 if (!strcmp(msg->req_method, "INVITE")) |
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66 handle_sip_invite(msg, &ess, sin); |
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67 else if (!strcmp(msg->req_method, "ACK")) |
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68 method_tbi(msg, &ess, sin); |
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69 else if (!strcmp(msg->req_method, "CANCEL")) |
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70 method_tbi(msg, &ess, sin); |
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71 else if (!strcmp(msg->req_method, "BYE")) |
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72 method_tbi(msg, &ess, sin); |
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73 else |
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74 unsupported_method(msg, &ess, sin); |
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75 } |