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# $Id: aim.py 23 2006-11-08 15:45:33Z dugsong $
"""AOL Instant Messenger."""
import dpkt
import struct
# OSCAR: http://iserverd1.khstu.ru/oscar/
class FLAP(dpkt.Packet):
__hdr__ = (
('ast', 'B', 0x2a), # '*'
('type', 'B', 0),
('seq', 'H', 0),
('len', 'H', 0)
)
def unpack(self, buf):
dpkt.Packet.unpack(self, buf)
if self.ast != 0x2a:
raise dpkt.UnpackError('invalid FLAP header')
if len(self.data) < self.len:
raise dpkt.NeedData, '%d left, %d needed' % (len(self.data), self.len)
class SNAC(dpkt.Packet):
__hdr__ = (
('family', 'H', 0),
('subtype', 'H', 0),
('flags', 'H', 0),
('reqid', 'I', 0)
)
def tlv(buf):
n = 4
try:
t, l = struct.unpack('>HH', buf[:n])
except struct.error:
raise dpkt.UnpackError
v = buf[n:n+l]
if len(v) < l:
raise dpkt.NeedData
buf = buf[n+l:]
return (t,l,v, buf)
# TOC 1.0: http://jamwt.com/Py-TOC/PROTOCOL
# TOC 2.0: http://www.firestuff.org/projects/firetalk/doc/toc2.txt
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