场景：
主叫方(1004，Yate客户端，端口号：52110) -> 通过FreeSWITCH(端口号:5070)呼叫 -> 被叫方(1000，ZoIPer客户端，端口号：5070)
被叫方经历：振铃->(N秒后)接听->正常通话一段时间后->挂断电话。
注：主叫、被叫、FreeSWITCH均在同1个机器(mac本上)
为了方便分析SIP报文，有2种方法：
1、freeswitch开启sip报文debug
sofia profile internal siptrace on
freeswitch控制台上，输入上述命令，即可开始记录SIP报文，上述通话过程，输出的报文日志如下（注：为了方便查看，每段报文手动加了序号）
1-> recv 903 bytes from udp/[192.168.7.101]:52110 at 20:07:57.811303: ------------------------------------------------------------------------ INVITE sip:1000@192.168.7.101 SIP/2.0 Max-Forwards: 20 Via: SIP/2.0/UDP 192.168.7.101:52110;rport;branch=z9hG4bK1749195434 From: <sip:1004@192.168.7.101>;tag=106736978 To: <sip:1000@192.168.7.101> Call-ID: 1808150176@192.168.7.101 CSeq: 5 INVITE User-Agent: YATE/5.5.0 Contact: <sip:1004@192.168.7.101:52110> Allow: ACK, INVITE, BYE, CANCEL, OPTIONS, INFO Content-Type: application/sdp Content-Length: 483 v=0 o=yate 1621771677 1621771677 IN IP4 192.168.7.101 s=SIP Call c=IN IP4 192.168.7.101 t=0 0 m=audio 20902 RTP/AVP 0 8 11 98 97 102 103 104 105 106 101 a=rtpmap:0 PCMU/8000 a=rtpmap:8 PCMA/8000 a=rtpmap:11 L16/8000 a=rtpmap:98 iLBC/8000 a=fmtp:98 mode=20 a=rtpmap:97 iLBC/8000 a=fmtp:97 mode=30 a=rtpmap:102 SPEEX/8000 a=rtpmap:103 SPEEX/16000 a=rtpmap:104 SPEEX/32000 a=rtpmap:105 iSAC/16000 a=rtpmap:106 iSAC/32000 a=rtpmap:101 telephone-event/8000 a=ptime:30 2021-05-23 20:07:57.808015 [NOTICE] switch_channel.c:1118 New Channel sofia/internal/1004@192.168.7.101 [e343d2cb-fef0-4f00-b83d-743a9b05b6f0] 2 -> send 802 bytes to udp/[192.168.7.101]:52110 at 20:07:57.814089: ------------------------------------------------------------------------ SIP/2.0 407 Proxy Authentication Required Via: SIP/2.0/UDP 192.168.7.101:52110;rport=52110;branch=z9hG4bK1749195434 From: <sip:1004@192.168.7.101>;tag=106736978 To: <sip:1000@192.168.7.101>;tag=4c1tpQSFK9t3D Call-ID: 1808150176@192.168.7.101 CSeq: 5 INVITE User-Agent: FreeSWITCH-mod_sofia/1.10.2-release~64bit Accept: application/sdp Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER, REFER, NOTIFY, PUBLISH, SUBSCRIBE Supported: timer, path, replaces Allow-Events: talk, hold, conference, presence, as-feature-event, dialog, line-seize, call-info, sla, include-session-description, presence.winfo, message-summary, refer Proxy-Authenticate: Digest realm="192.168.7.101", nonce="cf2b5f97-bf80-4637-9a38-5b5807386f0b", algorithm=MD5, qop="auth" Content-Length: 0 3 -> recv 351 bytes from udp/[192.168.7.101]:52110 at 20:07:57.833718: ------------------------------------------------------------------------ ACK sip:1000@192.168.7.101 SIP/2.0 Via: SIP/2.0/UDP 192.168.7.101:52110;rport;branch=z9hG4bK1749195434 From: <sip:1004@192.168.7.101>;tag=106736978 To: <sip:1000@192.168.7.101>;tag=4c1tpQSFK9t3D Call-ID: 1808150176@192.168.7.101 CSeq: 5 ACK Max-Forwards: 20 Contact: <sip:1004@192.168.7.101:52110> User-Agent: YATE/5.5.0 Content-Length: 0 4 -> recv 1173 bytes from udp/[192.168.7.101]:52110 at 20:07:57.833904: ------------------------------------------------------------------------ INVITE sip:1000@192.168.7.101 SIP/2.0 Max-Forwards: 20 Via: SIP/2.0/UDP 192.168.7.101:52110;rport;branch=z9hG4bK1194732859 From: <sip:1004@192.168.7.101>;tag=106736978 To: <sip:1000@192.168.7.101> Call-ID: 1808150176@192.168.7.101 User-Agent: YATE/5.5.0 Contact: <sip:1004@192.168.7.101:52110> Allow: ACK, INVITE, BYE, CANCEL, OPTIONS, INFO CSeq: 6 INVITE Proxy-Authorization: Digest username="1004", realm="192.168.7.101", nonce="cf2b5f97-bf80-4637-9a38-5b5807386f0b", uri="sip:1000@192.168.7.101", response="1318d10a492939a03eda60e7f0e9deed", algorithm=MD5, qop=auth, nc=0000000c, cnonce="5c5fdd612beb705f0cb01343ff044de7" Content-Type: application/sdp Content-Length: 483 v=0 o=yate 1621771677 1621771677 IN IP4 192.168.7.101 s=SIP Call c=IN IP4 192.168.7.101 t=0 0 m=audio 20902 RTP/AVP 0 8 11 98 97 102 103 104 105 106 101 a=rtpmap:0 PCMU/8000 a=rtpmap:8 PCMA/8000 a=rtpmap:11 L16/8000 a=rtpmap:98 iLBC/8000 a=fmtp:98 mode=20 a=rtpmap:97 iLBC/8000 a=fmtp:97 mode=30 a=rtpmap:102 SPEEX/8000 a=rtpmap:103 SPEEX/16000 a=rtpmap:104 SPEEX/32000 a=rtpmap:105 iSAC/16000 a=rtpmap:106 iSAC/32000 a=rtpmap:101 telephone-event/8000 a=ptime:30 2021-05-23 20:07:57.848628 [INFO] mod_dialplan_xml.c:637 Processing 1004 <1004>->1000 in context default 5 -> send 298 bytes to udp/[192.168.7.101]:52110 at 20:07:57.855169: ------------------------------------------------------------------------ SIP/2.0 100 Trying Via: SIP/2.0/UDP 192.168.7.101:52110;rport=52110;branch=z9hG4bK1194732859 From: <sip:1004@192.168.7.101>;tag=106736978 To: <sip:1000@192.168.7.101> Call-ID: 1808150176@192.168.7.101 CSeq: 6 INVITE User-Agent: FreeSWITCH-mod_sofia/1.10.2-release~64bit Content-Length: 0 EXECUTE [depth=0] sofia/internal/1004@192.168.7.101 log(CRIT WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING ) 2021-05-23 20:07:57.848628 [CRIT] mod_dptools.c:1866 WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING EXECUTE [depth=0] sofia/internal/1004@192.168.7.101 log(CRIT Open /usr/local/freeswitch/conf/vars.xml and change the default_password.) 2021-05-23 20:07:57.848628 [CRIT] mod_dptools.c:1866 Open /usr/local/freeswitch/conf/vars.xml and change the default_password. EXECUTE [depth=0] sofia/internal/1004@192.168.7.101 log(CRIT Once changed type 'reloadxml' at the console.) 2021-05-23 20:07:57.848628 [CRIT] mod_dptools.c:1866 Once changed type 'reloadxml' at the console. EXECUTE [depth=0] sofia/internal/1004@192.168.7.101 log(CRIT WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING ) 2021-05-23 20:07:57.848628 [CRIT] mod_dptools.c:1866 WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING EXECUTE [depth=0] sofia/internal/1004@192.168.7.101 sleep(10000) EXECUTE [depth=0] sofia/internal/1004@192.168.7.101 hash(insert/192.168.7.101-spymap/1004/e343d2cb-fef0-4f00-b83d-743a9b05b6f0) EXECUTE [depth=0] sofia/internal/1004@192.168.7.101 hash(insert/192.168.7.101-last_dial/1004/1000) EXECUTE [depth=0] sofia/internal/1004@192.168.7.101 hash(insert/192.168.7.101-last_dial/global/e343d2cb-fef0-4f00-b83d-743a9b05b6f0) EXECUTE [depth=0] sofia/internal/1004@192.168.7.101 export(RFC2822_DATE=Sun, 23 May 2021 20:08:06 +0800) EXECUTE [depth=0] sofia/internal/1004@192.168.7.101 export(dialed_extension=1000) EXECUTE [depth=0] sofia/internal/1004@192.168.7.101 bind_meta_app(1 b s execute_extension::dx XML features) 2021-05-23 20:08:06.698015 [INFO] switch_ivr_async.c:4465 Bound B-Leg: *1 execute_extension::dx XML features EXECUTE [depth=0] sofia/internal/1004@192.168.7.101 bind_meta_app(2 b s record_session::/usr/local/freeswitch/recordings/1004.2021-05-23-20-08-06.wav) 2021-05-23 20:08:06.698015 [INFO] switch_ivr_async.c:4465 Bound B-Leg: *2 record_session::/usr/local/freeswitch/recordings/1004.2021-05-23-20-08-06.wav EXECUTE [depth=0] sofia/internal/1004@192.168.7.101 bind_meta_app(3 b s execute_extension::cf XML features) 2021-05-23 20:08:06.698015 [INFO] switch_ivr_async.c:4465 Bound B-Leg: *3 execute_extension::cf XML features EXECUTE [depth=0] sofia/internal/1004@192.168.7.101 bind_meta_app(4 b s execute_extension::att_xfer XML features) 2021-05-23 20:08:06.698015 [INFO] switch_ivr_async.c:4465 Bound B-Leg: *4 execute_extension::att_xfer XML features EXECUTE [depth=0] sofia/internal/1004@192.168.7.101 set(ringback=%(2000,4000,440,480)) EXECUTE [depth=0] sofia/internal/1004@192.168.7.101 set(transfer_ringback=local_stream://moh) EXECUTE [depth=0] sofia/internal/1004@192.168.7.101 set(call_timeout=30) EXECUTE [depth=0] sofia/internal/1004@192.168.7.101 set(hangup_after_bridge=true) EXECUTE [depth=0] sofia/internal/1004@192.168.7.101 set(continue_on_fail=true) EXECUTE [depth=0] sofia/internal/1004@192.168.7.101 hash(insert/192.168.7.101-call_return/1000/1004) EXECUTE [depth=0] sofia/internal/1004@192.168.7.101 hash(insert/192.168.7.101-last_dial_ext/1000/e343d2cb-fef0-4f00-b83d-743a9b05b6f0) EXECUTE [depth=0] sofia/internal/1004@192.168.7.101 set(called_party_callgroup=techsupport) EXECUTE [depth=0] sofia/internal/1004@192.168.7.101 hash(insert/192.168.7.101-last_dial_ext/techsupport/e343d2cb-fef0-4f00-b83d-743a9b05b6f0) EXECUTE [depth=0] sofia/internal/1004@192.168.7.101 hash(insert/192.168.7.101-last_dial_ext/global/e343d2cb-fef0-4f00-b83d-743a9b05b6f0) EXECUTE [depth=0] sofia/internal/1004@192.168.7.101 hash(insert/192.168.7.101-last_dial/techsupport/e343d2cb-fef0-4f00-b83d-743a9b05b6f0) EXECUTE [depth=0] sofia/internal/1004@192.168.7.101 bridge(user/1000@192.168.7.101) 2021-05-23 20:08:06.698015 [NOTICE] switch_channel.c:1118 New Channel sofia/internal/1000@192.168.7.101:5060 [0c2ec47e-f3a6-4e74-8565-c523b5547d1f] 2021-05-23 20:08:06.708027 [NOTICE] switch_ivr_originate.c:2955 Cannot create outgoing channel of type [error] cause: [USER_NOT_REGISTERED] 6 -> send 1241 bytes to udp/[192.168.7.101]:5060 at 20:08:06.709329: ------------------------------------------------------------------------ INVITE sip:1000@192.168.7.101:5060;rinstance=00eb482b7d4631f5 SIP/2.0 Via: SIP/2.0/UDP 192.168.7.101:5070;rport;branch=z9hG4bKKS6jBryj6cv7c Max-Forwards: 19 From: "Extension 1004" <sip:1004@192.168.7.101>;tag=6yKctDUpDU78m To: <sip:1000@192.168.7.101:5060;rinstance=00eb482b7d4631f5> Call-ID: 5fcdc4bf-3662-123a-9a87-1158c9642285 CSeq: 36332051 INVITE Contact: <sip:mod_sofia@192.168.7.101:5070> User-Agent: FreeSWITCH-mod_sofia/1.10.2-release~64bit Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER, REFER, NOTIFY, PUBLISH, SUBSCRIBE Supported: timer, path, replaces Allow-Events: talk, hold, conference, presence, as-feature-event, dialog, line-seize, call-info, sla, include-session-description, presence.winfo, message-summary, refer Content-Type: application/sdp Content-Disposition: session Content-Length: 246 X-FS-Support: update_display,send_info Remote-Party-ID: "Extension 1004" <sip:1004@192.168.7.101>;party=calling;screen=yes;privacy=off v=0 o=FreeSWITCH 1621743220 1621743221 IN IP4 192.168.7.101 s=FreeSWITCH c=IN IP4 192.168.7.101 t=0 0 m=audio 28466 RTP/AVP 0 8 101 a=rtpmap:0 PCMU/8000 a=rtpmap:8 PCMA/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-16 a=ptime:30 7 -> recv 425 bytes from udp/[192.168.7.101]:5060 at 20:08:06.764337: ------------------------------------------------------------------------ SIP/2.0 180 Ringing Via: SIP/2.0/UDP 192.168.7.101:5070;rport=5070;branch=z9hG4bKKS6jBryj6cv7c Contact: <sip:1000@192.168.7.101:5060;rinstance=00eb482b7d4631f5> To: <sip:1000@192.168.7.101:5060;rinstance=00eb482b7d4631f5>;tag=03fd6964 From: "Extension 1004"<sip:1004@192.168.7.101>;tag=6yKctDUpDU78m Call-ID: 5fcdc4bf-3662-123a-9a87-1158c9642285 CSeq: 36332051 INVITE User-Agent: Zoiper rev.1809 Content-Length: 0 2021-05-23 20:08:06.775511 [NOTICE] sofia.c:7412 Ring-Ready sofia/internal/1000@192.168.7.101:5060! 2021-05-23 20:08:06.793301 [INFO] switch_ivr_originate.c:1246 Sending early media 2021-05-23 20:08:06.810398 [NOTICE] sofia_media.c:92 Pre-Answer sofia/internal/1004@192.168.7.101! 8 -> send 1091 bytes to udp/[192.168.7.101]:52110 at 20:08:06.821167: ------------------------------------------------------------------------ SIP/2.0 183 Session Progress Via: SIP/2.0/UDP 192.168.7.101:52110;rport=52110;branch=z9hG4bK1194732859 From: <sip:1004@192.168.7.101>;tag=106736978 To: <sip:1000@192.168.7.101>;tag=5NtKrjaKgjHpS Call-ID: 1808150176@192.168.7.101 CSeq: 6 INVITE Contact: <sip:1000@192.168.7.101:5070;transport=udp> User-Agent: FreeSWITCH-mod_sofia/1.10.2-release~64bit Accept: application/sdp Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER, REFER, NOTIFY, PUBLISH, SUBSCRIBE Supported: timer, path, replaces Allow-Events: talk, hold, conference, presence, as-feature-event, dialog, line-seize, call-info, sla, include-session-description, presence.winfo, message-summary, refer Content-Type: application/sdp Content-Disposition: session Content-Length: 222 Remote-Party-ID: "1000" <sip:1000@192.168.7.101>;party=calling;privacy=off;screen=no v=0 o=FreeSWITCH 1621743230 1621743231 IN IP4 192.168.7.101 s=FreeSWITCH c=IN IP4 192.168.7.101 t=0 0 m=audio 28456 RTP/AVP 0 101 a=rtpmap:0 PCMU/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-16 a=ptime:30 2021-05-23 20:08:07.618015 [WARNING] switch_core_media.c:3192 [CBR]: Asynchronous PTIME not supported, changing our end from 30 to 20 9 -> recv 840 bytes from udp/[192.168.7.101]:5060 at 20:08:21.972451: ------------------------------------------------------------------------ SIP/2.0 200 OK Via: SIP/2.0/UDP 192.168.7.101:5070;rport=5070;branch=z9hG4bKKS6jBryj6cv7c Contact: <sip:1000@192.168.7.101:5060;rinstance=00eb482b7d4631f5> To: <sip:1000@192.168.7.101:5060;rinstance=00eb482b7d4631f5>;tag=03fd6964 From: "Extension 1004"<sip:1004@192.168.7.101>;tag=6yKctDUpDU78m Call-ID: 5fcdc4bf-3662-123a-9a87-1158c9642285 CSeq: 36332051 INVITE Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, NOTIFY, REFER, MESSAGE, OPTIONS, INFO Content-Type: application/sdp User-Agent: Zoiper rev.1809 Content-Length: 306 v=0 o=Z 0 0 IN IP4 192.168.7.101 s=Z c=IN IP4 192.168.7.101 t=0 0 m=audio 8000 RTP/AVP 0 3 110 98 8 101 a=rtpmap:0 PCMU/8000 a=rtpmap:3 GSM/8000 a=rtpmap:110 speex/8000 a=rtpmap:98 iLBC/8000 a=fmtp:98 mode=30 a=rtpmap:8 PCMA/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-15 a=sendrecv 10 -> send 432 bytes to udp/[192.168.7.101]:5060 at 20:08:21.975783: ------------------------------------------------------------------------ ACK sip:1000@192.168.7.101:5060;rinstance=00eb482b7d4631f5 SIP/2.0 Via: SIP/2.0/UDP 192.168.7.101:5070;rport;branch=z9hG4bKm2ZBDKFp3Njtr Max-Forwards: 70 From: "Extension 1004" <sip:1004@192.168.7.101>;tag=6yKctDUpDU78m To: <sip:1000@192.168.7.101:5060;rinstance=00eb482b7d4631f5>;tag=03fd6964 Call-ID: 5fcdc4bf-3662-123a-9a87-1158c9642285 CSeq: 36332051 ACK Contact: <sip:mod_sofia@192.168.7.101:5070> Content-Length: 0 2021-05-23 20:08:21.978841 [NOTICE] sofia.c:8479 Channel [sofia/internal/1000@192.168.7.101:5060] has been answered 11 -> send 1061 bytes to udp/[192.168.7.101]:52110 at 20:08:22.005595: ------------------------------------------------------------------------ SIP/2.0 200 OK Via: SIP/2.0/UDP 192.168.7.101:52110;rport=52110;branch=z9hG4bK1194732859 From: <sip:1004@192.168.7.101>;tag=106736978 To: <sip:1000@192.168.7.101>;tag=5NtKrjaKgjHpS Call-ID: 1808150176@192.168.7.101 CSeq: 6 INVITE Contact: <sip:1000@192.168.7.101:5070;transport=udp> User-Agent: FreeSWITCH-mod_sofia/1.10.2-release~64bit Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER, REFER, NOTIFY, PUBLISH, SUBSCRIBE Supported: timer, path, replaces Allow-Events: talk, hold, conference, presence, as-feature-event, dialog, line-seize, call-info, sla, include-session-description, presence.winfo, message-summary, refer Content-Type: application/sdp Content-Disposition: session Content-Length: 222 Remote-Party-ID: "Outbound Call" <sip:1000@192.168.7.101>;party=calling;privacy=off;screen=no v=0 o=FreeSWITCH 1621743230 1621743231 IN IP4 192.168.7.101 s=FreeSWITCH c=IN IP4 192.168.7.101 t=0 0 m=audio 28456 RTP/AVP 0 101 a=rtpmap:0 PCMU/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-16 a=ptime:30 2021-05-23 20:08:21.998639 [NOTICE] switch_ivr_originate.c:3751 Channel [sofia/internal/1004@192.168.7.101] has been answered 12 -> recv 639 bytes from udp/[192.168.7.101]:52110 at 20:08:22.012161: ------------------------------------------------------------------------ ACK sip:1000@192.168.7.101:5070;transport=udp SIP/2.0 Via: SIP/2.0/UDP 192.168.7.101:52110;rport;branch=z9hG4bK411043961 From: <sip:1004@192.168.7.101>;tag=106736978 To: <sip:1000@192.168.7.101>;tag=5NtKrjaKgjHpS Call-ID: 1808150176@192.168.7.101 CSeq: 6 ACK Max-Forwards: 20 Contact: <sip:1004@192.168.7.101:52110> Proxy-Authorization: Digest username="1004", realm="192.168.7.101", nonce="cf2b5f97-bf80-4637-9a38-5b5807386f0b", uri="sip:1000@192.168.7.101", response="1318d10a492939a03eda60e7f0e9deed", algorithm=MD5, qop=auth, nc=0000000c, cnonce="5c5fdd612beb705f0cb01343ff044de7" User-Agent: YATE/5.5.0 Content-Length: 0 2021-05-23 20:08:22.258073 [WARNING] switch_core_media.c:3192 [CBR]: Asynchronous PTIME not supported, changing our end from 30 to 20 13 -> recv 476 bytes from udp/[192.168.7.101]:5060 at 20:08:47.008280: ------------------------------------------------------------------------ BYE sip:mod_sofia@192.168.7.101:5070 SIP/2.0 Via: SIP/2.0/UDP 192.168.7.101:5060;branch=z9hG4bK-d8754z-1ad0fd1d257abc86-1---d8754z-;rport Max-Forwards: 70 Contact: <sip:1000@192.168.7.101:5060;rinstance=00eb482b7d4631f5> To: "Extension 1004"<sip:1004@192.168.7.101>;tag=6yKctDUpDU78m From: <sip:1000@192.168.7.101:5060;rinstance=00eb482b7d4631f5>;tag=03fd6964 Call-ID: 5fcdc4bf-3662-123a-9a87-1158c9642285 CSeq: 2 BYE User-Agent: Zoiper rev.1809 Content-Length: 0 2021-05-23 20:08:47.018016 [NOTICE] sofia.c:1089 Hangup sofia/internal/1000@192.168.7.101:5060 [CS_EXCHANGE_MEDIA] [NORMAL_CLEARING] 14 -> send 536 bytes to udp/[192.168.7.101]:5060 at 20:08:47.020434: ------------------------------------------------------------------------ SIP/2.0 200 OK Via: SIP/2.0/UDP 192.168.7.101:5060;branch=z9hG4bK-d8754z-1ad0fd1d257abc86-1---d8754z-;rport=5060 From: <sip:1000@192.168.7.101:5060;rinstance=00eb482b7d4631f5>;tag=03fd6964 To: "Extension 1004"<sip:1004@192.168.7.101>;tag=6yKctDUpDU78m Call-ID: 5fcdc4bf-3662-123a-9a87-1158c9642285 CSeq: 2 BYE User-Agent: FreeSWITCH-mod_sofia/1.10.2-release~64bit Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER, REFER, NOTIFY, PUBLISH, SUBSCRIBE Supported: timer, path, replaces Content-Length: 0 2021-05-23 20:08:47.038076 [NOTICE] switch_ivr_bridge.c:1947 Hangup sofia/internal/1004@192.168.7.101 [CS_EXECUTE] [NORMAL_CLEARING] 2021-05-23 20:08:47.038076 [NOTICE] switch_core_session.c:1744 Session 9 (sofia/internal/1000@192.168.7.101:5060) Ended 2021-05-23 20:08:47.038076 [NOTICE] switch_core_session.c:1748 Close Channel sofia/internal/1000@192.168.7.101:5060 [CS_DESTROY] 15 -> send 547 bytes to udp/[192.168.7.101]:52110 at 20:08:47.051274: ------------------------------------------------------------------------ BYE sip:1004@192.168.7.101:52110 SIP/2.0 Via: SIP/2.0/UDP 192.168.7.101:5070;rport;branch=z9hG4bKNBS4ee0S0y8cm Max-Forwards: 70 From: <sip:1000@192.168.7.101>;tag=5NtKrjaKgjHpS To: <sip:1004@192.168.7.101>;tag=106736978 Call-ID: 1808150176@192.168.7.101 CSeq: 36332071 BYE User-Agent: FreeSWITCH-mod_sofia/1.10.2-release~64bit Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER, REFER, NOTIFY, PUBLISH, SUBSCRIBE Supported: timer, path, replaces Reason: Q.850;cause=16;text="NORMAL_CLEARING" Content-Length: 0 2021-05-23 20:08:47.058169 [NOTICE] switch_core_session.c:1744 Session 8 (sofia/internal/1004@192.168.7.101) Ended 2021-05-23 20:08:47.058169 [NOTICE] switch_core_session.c:1748 Close Channel sofia/internal/1004@192.168.7.101 [CS_DESTROY] 16 -> recv 309 bytes from udp/[192.168.7.101]:52110 at 20:08:47.085929: ------------------------------------------------------------------------ SIP/2.0 100 Trying Via: SIP/2.0/UDP 192.168.7.101:5070;rport=5070;branch=z9hG4bKNBS4ee0S0y8cm;received=192.168.7.101 From: <sip:1000@192.168.7.101>;tag=5NtKrjaKgjHpS To: <sip:1004@192.168.7.101>;tag=106736978 Call-ID: 1808150176@192.168.7.101 CSeq: 36332071 BYE Server: YATE/5.5.0 Content-Length: 0 17 -> recv 409 bytes from udp/[192.168.7.101]:52110 at 20:08:47.116921: ------------------------------------------------------------------------ SIP/2.0 200 OK Via: SIP/2.0/UDP 192.168.7.101:5070;rport=5070;branch=z9hG4bKNBS4ee0S0y8cm;received=192.168.7.101 From: <sip:1000@192.168.7.101>;tag=5NtKrjaKgjHpS To: <sip:1004@192.168.7.101>;tag=106736978 Call-ID: 1808150176@192.168.7.101 CSeq: 36332071 BYE P-RTP-Stat: PS=1986,OS=317760,PR=1987,OR=319520,PL=887 Server: YATE/5.5.0 Allow: ACK, INVITE, BYE, CANCEL, OPTIONS, INFO Content-Length: 0
2、采用wireshark抓包
共17条SIP报文。
梳理成时序图如下：
上图中，每1条最后的“-xx秒”，是根据wireshark中抓包截图中的Time列填上的，代表开始抓包后的第N秒截取到的包，从时间和CSeq大致可以看出来：
1-5 为主叫发起呼叫阶段
6-8 为被叫振铃阶段
9-12 为应答通话阶段
13-17 为挂断阶段