FreeCalypso > hg > themwi-system-sw
annotate sip-manual-out/sdp_in.c @ 258:aab047d9efcb
top Makefile: sip-out depends on libnumdb2 now
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Tue, 15 Aug 2023 10:54:16 -0800 |
parents | 10a4b0b0a239 |
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rev | line source |
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1 /* |
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2 * In this module we handle SDP responses to our INVITE. |
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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 <arpa/inet.h> |
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9 #include <stdio.h> |
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10 #include <stdlib.h> |
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11 #include <string.h> |
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12 #include <strings.h> |
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13 #include "../libsip/parse.h" |
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14 #include "../libsip/sdp.h" |
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15 |
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16 extern char *get_single_header(); |
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17 extern char *extract_to_tag(); |
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18 |
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19 struct sockaddr_in rtp_remote_addr; |
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20 int got_sdp_answer, pcma_selected, rtp_out_enable; |
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21 |
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22 static |
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23 check_sdp_present(msg) |
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24 struct sip_pkt_rx *msg; |
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25 { |
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26 char *hval; |
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27 |
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28 if (!msg->msg_body_len) |
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29 return 0; |
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30 hval = get_single_header(msg, "Content-Type", "c", (int *) 0); |
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31 if (!hval) |
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32 return 0; |
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33 if (!strcasecmp(hval, "application/sdp")) |
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34 return 1; |
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35 else |
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36 return 0; |
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37 } |
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38 |
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39 void |
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40 extract_resp_sdp(msg) |
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41 struct sip_pkt_rx *msg; |
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42 { |
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43 struct sdp_parse sdp_parse; |
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44 int rc; |
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45 |
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46 if (!check_sdp_present(msg)) |
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47 return; |
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48 rc = parse_incoming_sdp(msg->msg_body, msg->msg_body_len, &sdp_parse); |
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49 if (rc < 0) { |
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50 printf("SDP parse error: %d\n", rc); |
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51 return; |
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52 } |
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53 switch (sdp_parse.codec_mask) { |
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54 case SDP_CODEC_MASK_PCMU: |
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55 case SDP_CODEC_MASK_BOTH: |
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56 pcma_selected = 0; |
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57 break; |
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58 case SDP_CODEC_MASK_PCMA: |
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59 case SDP_CODEC_MASK_BOTH | SDP_CODEC_MASK_PCMA_PREF: |
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60 pcma_selected = 1; |
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61 break; |
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62 default: |
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63 printf("SDP error: no supported codec\n"); |
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64 return; |
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65 } |
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66 printf("SDP response: IP %s port %u codec %s\n", |
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67 inet_ntoa(sdp_parse.ip_addr), sdp_parse.audio_port, |
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68 pcma_selected ? "PCMA" : "PCMU"); |
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69 rtp_remote_addr.sin_family = AF_INET; |
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70 rtp_remote_addr.sin_addr = sdp_parse.ip_addr; |
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71 rtp_remote_addr.sin_port = htons(sdp_parse.audio_port); |
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72 got_sdp_answer = 1; |
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73 } |
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74 |
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75 void |
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76 invite_200_rtpout() |
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77 { |
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78 if (!got_sdp_answer) { |
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79 printf("INVITE response has no SDP!\n"); |
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80 return; |
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81 } |
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82 rtp_out_enable = 1; |
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83 assign_rtpout_ssrc(); |
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84 init_pcm_fill_octet(); |
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85 prepare_tfo_fill(); |
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86 } |