Message Session Relay Protocol Adaptation for Interactive Connectivity Establishment (ICE) draft-niemi-simple-msrp-ice-00 - PowerPoint PPT Presentation

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Message Session Relay Protocol Adaptation for Interactive Connectivity Establishment (ICE) draft-niemi-simple-msrp-ice-00

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... the initiator collects ICE candidates, each of which are one of three types: ... a=fingerprint:SHA-1. 4A:AD:B9:B1:3F:82:18:3B:54:02:12:DF:3E:5D:49:6B:19:E5:7C:AB ... – PowerPoint PPT presentation

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Title: Message Session Relay Protocol Adaptation for Interactive Connectivity Establishment (ICE) draft-niemi-simple-msrp-ice-00


1
Message Session Relay Protocol Adaptation for
Interactive Connectivity Establishment (ICE)
draft-niemi-simple-msrp-ice-00
  • SpeakerWenping Zhang
  • Date2008/01/23

2
Outline
  • Introduction
  • Overview of Operation
  • Generating SDP offer
  • Generation SDP Answer
  • Reference

3
Introduction
  • The Message Session Relay Protocol (MSRP) defines
    a mechanism for transmitting a series of related
    instant messages in the context of a session.
  • This session is established using a separate
    session negotiation protocol, such as the Session
    Initiation Protocol (SIP) , and the Offer/Answer
    Model with the Session Description Protocol (SDP)
    .

4
Overview of Operation
  • To initiate an MSRP session, the initiator
    collects ICE candidates, each of which are one of
    three types
  • An active candidate for which the agent will
    attempt to open a TCP connection
  • A passive candidate for which the agent will be
    in passive mode and only listen for incoming
    connections
  • Simultaneous open candidate, for which the agents
    will attempt a TCP simultaneous open

5
Generating SDP Offer
v0 ojdoe 2890844526 2890842807 IN IP4 s
cIN IP4 192.0.2.3 t0 0 aice-pwdasd88fgpdd77
7uzjYhagZg aice-ufrag8hhY mmessage 7746
TCP/MSRP aaccept-typestext/plain
apathmsrp//192.0.2.37746/asd88fgpdd777uzjYhag
Zgtcp acandidate1 1 tcp-so 2130706178
10.0.0.5 12534 typ local acandidate2 1
tcp-pass 2130706178 10.0.0.5 12534 typ local
acandidate3 1 tcp-so 1694498562 192.0.2.3 7746
typ srflx raddr 10.0.0.5 rport 12534
acandidate4 1 tcp-act 1694498562 192.0.2.3
7746 typ srflx raddr 10.0.0.5 rport 12534
acandidate5 1 tcp-pass 1694498562 192.0.2.3
7746 typ srflx raddr 10.0.0.5 rport 12534
acandidate6 1 tcp-pass 1694498562 192.0.2.3
7746 typ relay raddr 10.0.0.5 rport 12534
6
Generating SDP Answer
v0 ojdoe 2890844526 2890842807 IN IP4 s
cIN IP4 192.0.2.3 t0 0 aice-pwdasd88fgpdd777
uzjYhagZg aice-ufrag8hhY mmessage 7746
TLS/MSRP asetupholdconn Also useless...
aconnectionexisting afingerprintSHA-1
4AADB9B13F82183B540212DF3E5D496B19
E57CAB aaccept-typestext/plain
apathmsrp//192.0.2.37746/asd88fgpdd777uzjYhag
Zg acandidate1 1 tls-so 2130706178 10.0.0.5
12534 typ local acandidate2 1 tls-act
2130706178 10.0.0.5 12534typ local acandidate3
1 tls-pass 2130706178 10.0.0.5 12534 typ local
acandidate4 1 tls-so 1694498562 192.0.2.3 7746
typ srflx raddr 10.0.0.5 rport 12534
acandidate5 1 tls-act 1694498562 192.0.2.3
7746 typ srflx raddr 10.0.0.5 rport 12534
acandidate6 1 tls-pass 1694498562 192.0.2.3
7746 typ srflx raddr 10.0.0.5 rport 12534
7
Reference
  • Message Session Relay Protocol Adaptation for
    Interactive Connectivity Establishment (ICE)
  • RFC4975 The Message Session Relay Protocol
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