Protocols/MSNP/MSNC/SIP: Difference between revisions

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Latest revision as of 03:40, 31 August 2023

MSNP Protocol
MSNC
OverviewMSNObject
Client Capabilities
P2P protocol
TransportsMSNSLP
Headers
P2Pv1 Binary headers
P2Pv2 Binary headers
Transfers
Display Pictures
Custom Emoticons
File Transfer
Overview
IntroductionTermsClients
Reference
Error ListCommandsRelying Party SuiteSpotlife
Services
XMPPHTTP GatewayTabsActivities
Documentation
Development ToolsMSNP Grid
PolygamyURLs used by MSN
Documents
Protocol Versions
Version 21
Version 18
Version 16
Version 15
Version 14
Version 13
Version 12
Version 11
Version 9
Version 8
Version 2
MSNC
IntroductionP2PObject DescriptorDisplay PicturesFile Transfer
Scenarios
Microsoft Messenger for Mac
MSNP on WebTV (MSNTV)


Overview

SIP, Session Initiation Protocol, is commonly used along with the UBM command. It is sent in XML form, and has more important data in a massive base64 encoded string sent along with it. Very much alike MSNSLP See http://www.ietf.org/rfc/rfc2543.txt for details.

Example

Within the UBM payload:

<sip e="base64" fid="0" i="2d20e210bb3f45fead80f7bf7ee8bf07"><msg>
SU5WSVRFIHNpcDpvbWVnbGVib3RAaG90bWFpbC5jb20gU0lQLzIuMA0KYzogYXBwbGljYXRpb24v
c2RwDQpVc2VyLUFnZW50OiBVQ0NBUEkvMy41LjY4NzIuMA0KQ1NlcTogMSBJTlZJVEUNCnY6IFNJ
...</msg></sip>

Explanation of basic fields

E

This specifies the what the message is encoded with. This is base64 almost every time. Other types are unknown.

Fid

This is presumably an ID number of the request.

I

The value of the Call-ID field.

The MSG element

Inside the msg element, is a, usually very long, base 64 encoded message.

Example

A typically decoded message looks like this: (This is from a Windows Live Messenger 'Voice Call' request.

INVITE sip:email@addr.ess SIP/2.0\r\n
c: application/sdp\r\n
User-Agent: UCCAPI/3.5.6872.0\r\n
CSeq: 1 INVITE\r\n
v: SIP/2.0/TCP 127.0.0.1:1373\r\n
v: SIP/2.0/TCP 127.0.0.1:1376\r\n
MS-Keep-Alive: UAC;hop-hop=yes\r\n
Allow: INVITE, BYE, ACK, CANCEL, INFO, UPDATE, REFER, NOTIFY, BENOTIFY, OPTIONS\r\n
f: <sip:buddy@live.com;mepid=AB14091188684C439B51838E21CC464D>;tag=46f287b705;epid=5e67e6a2c0\r\n
i: 2d20e210bb3f45fead80f7bf7ee8bf07\r\n
Max-Forwards: 70\r\n
k: 100rel\r\n
k: Replaces\r\n
k: ms-early-media\r\n
k: ms-sender\r\n
k: ms-safe-transfer\r\n
k: histinfo\r\n
k: timer\r\n
m: <sip:buddy@live.com;mepid=AB14091188684C439B51838E21CC464D>;proxy=replace;+sip.instance="<urn:uuid:396BFFAF-8595-52C8-9ACB-00B50175C93F>"\r\n
t: <sip:email@addr.ess>\r\n
MS-Conversation-ID: f=0\r\n
Record-Route: <sip:127.0.0.1:1373;transport=tcp>\r\n
l: 1760\r\n
\r\n
v=0\r\n
o=- 0 0 IN IP4 207.46.124.251\r\n
s=session\r\n
c=IN IP4 207.46.124.251\r\n
b=CT:99980\r\n
t=0 0\r\n
m=audio 41994 RTP/AVP 114 111 112 115 116 4 8 0 97 13 118 101\r\n
a=ice-ufrag:FRzl\r\n
a=ice-pwd:26U2T6AAOAThyPbh0uxjJLOc\r\n
a=candidate:1 1 UDP 2130706431 10.0.1.55 22246 typ host \r\n
a=candidate:1 2 UDP 2130705918 10.0.1.55 11556 typ host \r\n
a=candidate:2 1 UDP 16647679 207.46.124.251 41994 typ relay raddr 207.46.124.251 rport 41994 \r\n
a=candidate:2 2 UDP 16647678 207.46.124.251 56207 typ relay raddr 207.46.124.251 rport 56207 \r\n
a=candidate:3 1 TCP-PASS 6555135 207.46.124.205 52918 typ relay raddr 207.46.124.205 rport 52918 \r\n
a=candidate:3 2 TCP-PASS 6555134 207.46.124.205 52918 typ relay raddr 207.46.124.205 rport 52918 \r\n
a=candidate:4 1 UDP 1694235647 **.175.**.100 34353 typ srflx raddr 10.0.1.55 rport 34353 \r\n
a=candidate:4 2 UDP 1694235134 **.175.**.100 33468 typ srflx raddr 10.0.1.55 rport 33468 \r\n
a=candidate:5 1 TCP-ACT 7076351 207.46.124.205 52918 typ relay raddr 207.46.124.205 rport 52918 \r\n
a=candidate:5 2 TCP-ACT 7075838 207.46.124.205 52918 typ relay raddr 207.46.124.205 rport 52918 \r\n
a=candidate:6 1 TCP-ACT 1684797439 **.175.**.100 48701 typ srflx raddr 10.0.1.55 rport 48701 \r\n
a=candidate:6 2 TCP-ACT 1684796926 **.175.**.100 48701 typ srflx raddr 10.0.1.55 rport 48701 \r\n
a=maxptime:200\r\n
a=rtcp:56207\r\n
a=rtpmap:114 x-msrta/16000\r\n
a=fmtp:114 bitrate=29000\r\n
a=rtpmap:111 SIREN/16000\r\n
a=fmtp:111 bitrate=16000\r\n
a=rtpmap:112 G7221/16000\r\n
a=fmtp:112 bitrate=24000\r\n
a=rtpmap:115 x-msrta/8000\r\n
a=fmtp:115 bitrate=11800\r\n
a=rtpmap:116 AAL2-G726-32/8000\r\n
a=rtpmap:4 G723/8000\r\n
a=rtpmap:8 PCMA/8000\r\n
a=rtpmap:0 PCMU/8000\r\n
a=rtpmap:97 RED/8000\r\n
a=rtpmap:13 CN/8000\r\n
a=rtpmap:118 CN/16000\r\n
a=rtpmap:101 telephone-event/8000\r\n
a=fmtp:101 0-16\r\n
a=encryption:rejected\r\n
\r\n