SNAC(04,0B) client message ack command

SNAC(04,0B)

CLI_ICBM_SENDxACK

Client send this snac as reply to SNAC(04,07). Server transfer it to client without changes, but only if its format is valid. This snac also used for auto-messages (away message/busy message/chat message/etc).

00 04	word	SNAC family
00 0B	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

xx xx	word	message type (channel)
xx	byte	screenname string length
xx ..	string	screenname string
00 03	word	reason code

1b 00	word (LE)	length of following data chunk
xx xx	word (LE)	client dc protocol version
00 00 00 00	dword (LE)	unknown
00 00 00 00	dword (LE)	unknown
00 00 00 00	dword (LE)	unknown
00 00 00 00	dword (LE)	unknown
00 00	word (LE)	unknown
xx xx xx xx	dword (LE)	client futures
00	byte	unknown
xx xx	word (LE)	sequence number (pseq#1)

0e 00	word (LE)	length of the following data chunk
xx xx	word (LE)	sequence number (same as pseq#1)
00 00 00 00	dword (LE)	unknown
00 00 00 00	dword (LE)	unknown
00 00 00 00	dword (LE)	unknown

xx	byte	message type
xx	byte	message flags
00 00	word (LE)	status code (not used here)
00 00	word (LE)	priority code (not used here)
xx xx	word (LE)	message string length
xx ..	string	message string (null-terminated)
00 00 00 00	dword (LE)	text color (rgbn, not used, optional)
00 00 00 00	dword (LE)	background color (rgbn, not used, optional)

Example SNAC dump with flap header:


  2A 02 54 28 00 6E 00 04  00 0B 00 00 00 00 00 0B *.T(.n..........
  F3 3A C1 0C 70 18 00 00  00 02 07 36 32 31 38 38 .:..p......62188
  39 35 00 03 1B 00 07 00  00 00 00 00 00 00 00 00 95..............
  00 00 00 00 00 00 00 00  00 00 03 00 00 00 00 07 ................
  00 0E 00 07 00 00 00 00  00 00 00 00 00 00 00 00 ................
  00 E9 03 00 00 00 00 1B  00 55 73 65 72 20 69 73 .........User is
  20 63 75 72 72 65 6E 74  6C 79 20 4F 63 63 75 70  currently Occup
  69 65 64 00                                      ied.