[lwip-devel] [bug #34426] TCP retransmission transmits 1 byte instead of original packet, with incorrect byte value

[Min Xu]

Follow-up Comment #4, bug #34426 (project lwip):

Using example1.pcap, and the relative sequence number from wireshark, just
after the ARP flood, DSP was able to transmit TWO 1460 byte TCP payload to the
DSP, at which time the desktop's receive window is "full":
DSP Tx SEQ + 1460 - Desktop Rx ACK =
93276 + 1460 - 30496 = 64240.

However, at that moment, the desktop only ACKd  30496 so it will expect the
next TCP to start at 30496, which the DSP did, but for only 1 byte.  So the
FOUR 1 byte "retransmissions" from the DSP at SEQ 30496 are inside the window,
but should not be called through the zero-window code...


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