def handle_header(self, buf):
"""Takes a buffer and readers information from header.
Returns a tuple (pktsize, pktnr)
"""
pktsize = utils.int3read(buf[0:3])
pktnr = utils.int1read(buf[3])
return (pktsize, pktnr)
def is_valid(self, buf=None):
if buf is None:
buf = self.data
(l, n) = (buf[0:3], buf[3])
hlength = utils.int3read(l)
rlength = len(buf) - 4
if hlength != rlength:
return False
res = self._is_valid_extra(buf)
if res != None:
return res
return True