def processPacket(self, packet, *args, **kwargs):
tcpPkt = self.agent.extract(packet)
if tcpPkt is None:
return None
if not self.matches(packet, *args, **kwargs):
return None
for f in self.filters:
packet = f.packetIn(packet)
conn = self.getConnection(packet, *args, **kwargs)
if not conn:
return None
conn = self.processTcpPkt(conn, packet, tcpPkt)
if not conn or conn.closed:
return None
conn = self.processTcpData(conn, packet, tcpPkt, *args, **kwargs)
_tcpPkt = self.getReply(packet, *args, **kwargs)
if _tcpPkt is None:
return None
resp = self.agent.buildStandardTcpResponse(
packet, _tcpPkt, payload=_tcpPkt.next, ipId=None if not conn.ipId else conn.ipId + 1
)
if conn.ipId is None:
ipId = Ipv4Agent.extractId(resp)
if ipId == 0:
ipId = randint(0, 2 ** 16 - 1)
conn.ipId = ipId
conn.ipId += 1
return resp
def processPacket(self, packet, *args, **kwargs):
tcpPkt = self.agent.extract(packet)
if tcpPkt is None:
return None
if not self.matches(packet, *args, **kwargs):
return None
for f in self.filters:
packet = f.packetIn(packet)
if self.agent.isRst(tcpPkt) and not self.my_first_syn_acked:
self.doConnectionFailure()
return
self.processTcpPkt(packet, tcpPkt)
self.processTcpData(packet, tcpPkt, *args, **kwargs)
_tcpPkt = self.getReply(packet, *args, **kwargs)
if _tcpPkt is None:
return None
resp = self.agent.buildStandardTcpResponse(
packet, _tcpPkt, payload=_tcpPkt.next, ipId=None if not self.ipId else self.ipId
)
if self.ipId is None:
ipId = Ipv4Agent.extractId(resp)
if ipId == 0:
ipId = randint(0, 2 ** 16 - 1)
del randint
self.ipId = ipId
self.ipId += 1
return resp
