SNAC(04,06)/CH2 client send channel 2 message command

SNAC(04,06)/CH2

CLI_SEND_ICBM_CH2

Client use this snac to send message thru server on channel 2.

00 04	word	SNAC family
00 06	word	SNAC subtype
00 00	word	SNAC flags
xx xx xx xx	dword	SNAC request-id

xx xx xx xx xx xx xx xx	qword	msg-id cookie
00 02	word	message channel
xx	byte	screenname string length
xx ..	string	screenname string

00 05		word		TLV.Type(0x05) - rendezvous message data
xx xx		word		TLV.Length

xx xx	word	message type (0 - request, 1 - cancel, 2 - accept)
xx xx xx xx xx xx xx xx	qword	msg-id cookie (same as above)
xx .. xx	guid	capability (determines format of message data in "extention data" below)

00 03		word		TLV.Type(0x03) - internal ip
xx xx		word		TLV.Length

xx xx xx xx

dword

internal ip

00 05		word		TLV.Type(0x05) - listening port
xx xx		word		TLV.Length

xx xx

word

listening port

00 0A		word		TLV.Type(0x0A) - unknown
xx xx		word		TLV.Length

xx xx

word

unknown (usually 1)

00 0B		word		TLV.Type(0x0B) - unknown
xx xx		word		TLV.Length

xx xx

word

unknown

00 0F		word		TLV.Type(0x0F) - unknown
00 00		word		TLV.Length

empty

11 27		word		TLV.Type(0x2711) - extention data
xx xx		word		TLV.Length

Following contents is capability-specific.

Data format description for capability {09461349-4C7F-11D1-8222-444553540000}

xx xx	word (LE)	length of following data
xx xx	word (LE)	protocol version
xx .. xx	guid (LE)	plugin or zero bytes
xx xx	word	unknown
xx xx xx xx	dword (LE)	client capabilities flags
xx	byte	unknown
xx xx	word (LE)	seems to be a downcounter

xx xx	word (LE)	length of following data
xx xx	word (LE)	seems to be a downcounter as in first chunk above
xx ..		unknown, usually zeros

if plugin field in first chunk above is zero, here is message, overwise here is plugin-specific data.

00 03		word		TLV.Type(0x03) - request an ack from server
00 00		word		TLV.Length

empty

Example SNAC dumps with flap header:


  2A 02 36 87 00 99 00 04 00 06 00 00 00 0F 00 06  *.6Ç.Ù..........
  CC EB 54 00 F7 07 00 00 00 02 09 31 32 33 34 35  ¦ûT.¢......12345
  36 37 38 39 00 05 00 73 00 00 CC EB 54 00 F7 07  6789...s..¦ûT.¢.
  00 00 09 46 13 49 4C 7F 11 D1 82 22 44 45 53 54  ...F.IL.TÂ"DEST
  00 00 00 0A 00 02 00 01 00 0F 00 00 27 11 00 4B  ............'..K
  1B 00 08 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  00 00 00 00 00 00 03 00 00 00 00 FB FF 0E 00 FB  ...........v ..v
  FF 00 00 00 00 00 00 00 00 00 00 00 00 01 00 00   ...............
  00 21 00 0E 00 54 65 73 74 20 6D 65 73 73 61 67  .!...Test messag
  65 2E 00 00 00 00 00 FF FF FF 00 00 03 00 00     e......   .....