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test-tcp.click
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test-tcp.click
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FromDevice(eth0)
-> is_ip :: Classifier(12/0800, -);
is_ip [1] -> Discard;
is_ip [0]
-> Strip(14)
-> CheckIPHeader
-> is_tcp :: IPClassifier(tcp 18.26.4.10, -);
is_tcp [1] -> Discard;
//
// below is the tcp stack
//
ack :: TCPAck;
con :: TCPConn;
dmx :: TCPDemux;
rob :: TCPBuffer(false);
b2p :: BufferConverter(1400);
fid :: CopyFlowID;
seq :: CopyTCPSeq;
out :: SetTCPChecksum
-> SetIPChecksum
-> IPPrint(o)
-> EtherEncap(0x0800, 00:E0:98:09:AB:AF, 00:E0:52:EA:E2:02)
-> ToDevice(eth0);
is_tcp [0]
-> IPPrint(p)
-> CheckTCPHeader
-> dmx
-> [0] ack [0] // figures out what ack number to use; schedule ACKs
-> [0] con [0] // process connection setup/termination packets
-> IPPrint(i)
-> rob // reorder buffer
-> IPPrint(b)
-> [0] b2p; // to application
b2p // from application
-> Queue
-> [1] con [1] // sets sa, sp, da, dp, and seq number
-> Unqueue // XXX need retransmit thing
-> [1] ack [1] // tags on ack number
-> [0] fid [0] // remembers flowid
-> [0] seq [0] // remembers highest sequence number
-> out;
con [2] // send out SYN and SYN ACK packets
-> [0] fid;
ack [2] // send explicit ACKs
-> [1] fid [1] // set flowid
-> [1] seq [1] // set sequence number
-> out;
Idle -> [1] b2p; // for path mtu discovery
ControlSocket("TCP", 12345);