SIP多方会话消息之实例讲解.ppt

SIP多方会话消息之实例讲解,郑昀2005-05应用开发事业部神州泰岳,Agenda,SIPINVITE第一个用户SIPINVITE第二个用户SIP第三个INVITESIP发送MESSAGE消息,SIPINVITE第一个用户,INVITEsip:192.168.1.81:2185;transport=tcp;ms-received-cid=200SIP/2.0contact:via:SIP/2.0/TCP192.168.1.223:9468;ms-received-port=3783;ms-received-cid=700max-forwards:70from:“tom;tag=82c18ee5fbe4429da6d5ec3653563251;epid=b048f84682to:;epid=e1fb65a8b3call-id:4517ca278efd43fa90361c0cc8949624cseq:1INVITERoster-Manager:sip:tomEndPoints:“tom,supported:com.microsoft.rtc-multipartycontent-type:application/sdpcontent-length:133,目的：tom邀请第一个用户jerry加入会话supported:列举了UAC或UAS支持的扩展Roster-Manager:“花名册管理员”管理一个Session的用户登记列表EndPoints:列出当前会话中所有的接收方的SIPURI,1,SIP/2.0100Tryingcseq:1INVITE,2,SIP/2.0200OKcontact:cseq:1INVITEsupported:com.microsoft.rtc-multipartycontent-type:application/sdp,3,ACKsip:jerry:2185;maddr=192.168.1.81;transport=tcp;ms-received-cid=200SIP/2.0from:tom;tag=82c18ee5fbe4429da6d5ec3653563251;epid=b048f84682to:;epid=e1fb65a8b3;tag=0f3997c0c7b24658812a0a565899f6bfcseq:1ACKcontent-length:0,4,SIPINVITE第二个用户,INVITEsip:192.168.1.80:2641;transport=tcp;ms-received-cid=400SIP/2.0contact:from:tom;tag=834b5a151baa44e2849acfafa5ebdd3e;epid=b048f84682to:;epid=0997132b14call-id:4517ca278efd43fa90361c0cc8949624cseq:1INVITERoster-Manager:sip:tomEndPoints:tom,;epid=e1fb65a8b3,require:com.microsoft.rtc-multipartycontent-type:application/sdpcontent-length:133,目的：tom邀请第二个用户jerry加入会话require:UAC通过Require字段列出的选项标签，告知UAS处理请求时需要支持的选项Roster-Manager:还是第一个发起会话的用户作为花名册管理员EndPoints:列出当前会话中三方的SIPURI,1,SIP/2.0100Tryingcseq:1INVITE,2,SIP/2.0200OKcontact:cseq:1INVITEsupported:com.microsoft.rtc-multipartycontent-type:application/sdp,3,ACKsip:vicky:2641;maddr=192.168.1.80;transport=tcp;ms-received-cid=400SIP/2.0from:tom;tag=82c18ee5fbe4429da6d5ec3653563251;epid=b048f84682to:;epid=0997132b14;tag=6dba5f858604444591dd1d626b5b1a13cseq:1ACKcontent-length:0,4,SIP第三个INVITE,INVITEsip:192.168.1.81:2185;transport=tcp;ms-received-cid=200SIP/2.0contact:via:SIP/2.0/TCP192.168.1.80:8426;ms-received-port=2641;ms-received-cid=400max-forwards:70from:;tag=aaa00d60672b403b8a5d799bcd1401bb;epid=0997132b14to:;epid=e1fb65a8b3call-id:4517ca278efd43fa90361c0cc8949624cseq:1INVITETriggeredInvite:TRUErequire:com.microsoft.rtc-multiparty,目的：vicky再邀请jerry加入会话TriggeredInvite:表明本次INVITE消息是被触发的，而不是vicky主动发起的,1,SIP/2.0100Tryingcseq:1INVITE,2,SIP/2.0200OKcontact:cseq:1INVITEsupported:com.microsoft.rtc-multipartycontent-type:application/sdp,3,ACKsip:jerry:2185;maddr=192.168.1.81;transport=tcp;ms-received-cid=200SIP/2.0from:tom;tag=82c18ee5fbe4429da6d5ec3653563251;epid=b048f84682to:;epid=e1fb65a8b3;tag=0f3997c0c7b24658812a0a565899f6bfcseq:1ACKcontent-length:0,4,SIP发送MESSAGE消息,MESSAGEsip:vicky:2641;maddr=192.168.1.80;transport=tcp;ms-received-cid=400SIP/2.0contact:cseq:3MESSAGEcontent-type:text/plain;charset=UTF-8;,目的：tom写一个message，实际上先后向vicky和jerry发送消息,SIP/2.0200OKcontact:cseq:3MESSAGE,1,2,3,MESSAGEsip:jerry:2185;maddr=192.168.1.