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# $Id: sll.py 23 2006-11-08 15:45:33Z dugsong $
# -*- coding: utf-8 -*-
"""Linux libpcap "cooked" capture encapsulation."""
import arp
import dpkt
import ethernet
class SLL(dpkt.Packet):
__hdr__ = (
('type', 'H', 0), # 0: to us, 1: bcast, 2: mcast, 3: other, 4: from us
('hrd', 'H', arp.ARP_HRD_ETH),
('hlen', 'H', 6), # hardware address length
('hdr', '8s', ''), # first 8 bytes of link-layer header
('ethtype', 'H', ethernet.ETH_TYPE_IP),
)
_typesw = ethernet.Ethernet._typesw
def unpack(self, buf):
dpkt.Packet.unpack(self, buf)
try:
self.data = self._typesw[self.ethtype](self.data)
setattr(self, self.data.__class__.__name__.lower(), self.data)
except (KeyError, dpkt.UnpackError):
pass
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