本文主要是介绍RCS-MSRP案例，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
1. 建立IMS链路
INVITE sip:+14231234567@msg.pc.t-mobile.com;user=phone SIP/2.0
Via: SIP/2.0/TCP [fc01:bbbb:cdcd:efe1:5e70:ff35:c442:b724]:8001;branch=z9hG4bK-577ab82f-001;rport
Route:<sip:[fc01:abab:cdcd:6fee::1]:5064;lr>
From:<sip:310260123456789@ims.mnc260.mcc310.3gppnetwork.org>;tag=00000001-00000001-329713355
To:<sip:+14231234567@msg.pc.t-mobile.com;user=phone>
Call-ID:44eb613760665721e364feea57503405-8001@fc01:bbbb:cdcd:efe1:5e70:ff35:c442:b724
Conversation-ID:c7b5a02c-e3fa-4833-bab3-2ca45e1119b8
Contribution-ID:ba57bb85-cf63-4343-a6a9-96213995404b
CSeq: 1 INVITE
Contact: <sip:310260123456789@[fc01:bbbb:cdcd:efe1:5e70:ff35:c442:b724]:8001;transport=TCP>;*;+g.3gpp.icsi-ref="urn%3Aurn-7%3A3gpp-service.ims.icsi.oma.cpm.session"
Max-Forwards: 70
P-Preferred-Identity:<sip:310260123456789@ims.mnc260.mcc310.3gppnetwork.org>
Security-Verify:ipsec-3gpp;alg=hmac-sha-1-96;q=0.9;spi-s=2014650206;port-s=5064;spi-c=2441734502;port-c=5063,ipsec-3gpp;alg=hmac-md5-96;q=0.7;spi-s=2014650206;port-s=5064;spi-c=2441734502;port-c=5063
Allow: INVITE,ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY, MESSAGE, SUBSCRIBE, INFO, UPDATE,PRACK, REGISTER
Content-Type:application/sdp //指明内容格式
Accept-Contact:*;+g.3gpp.icsi-ref="urn%3Aurn-7%3A3gpp-service.ims.icsi.oma.cpm.session"
P-Preferred-Service:urn:urn-7:3gpp-service.ims.icsi.oma.cpm.session
Content-Length:359
v=0
o=- 2014 1 IN IP6fc01:bbbb:cdcd:efe1:5e70:ff35:c442:b724
s=-
c=IN IP6fc01:bbbb:cdcd:efe1:5e70:ff35:c442:b724
t=0 0
m=message 9 TCP/MSRP* //MSRP消息
a=accept-types:message/cpimapplication/im-iscomposing+xml
a=accept-wrapped-types:*
a=sendrecv
a=path:msrp://[fc01:bbbb:cdcd:efe1:5e70:ff35:c442:b724]:9/1466944214957;tcp
a=connection:new
a=setup:active
SIP/2.0 100 Trying
Call-ID:44eb613760665721e364feea57503405-8001@fc01:bbbb:cdcd:efe1:5e70:ff35:c442:b724
CSeq: 1 INVITE
From: <sip:310260123456789@ims.mnc260.mcc310.3gppnetwork.org>;tag=00000001-00000001-329713355
Max-Forwards: 70
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