12-20-2010
If the problem does not related with the listen(), it may be an interesting thing.
I sent 1024 packets to the server (a PC has both sender and receiver, that means, it send packets to itself).
When I Ctrl+C to close and reopen the program few times, the receiver may receive extra package and garbage; and some packets are missing.
If I send 65535 packets at a time, this problem happens more frequency.
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