[lwip-devel] [bug #19162] lwip_sendto: possible to corrupt remote addr/port connection state

[Frédéric Bernon]

Follow-up Comment #3, bug #19162 (project lwip):

Hello,

Not sure this is the same problem than Rob. I fI have understand comment #1,
Rob got a problem if several application's thread try to use the same socket
in same time. And he got a problem in this sequence (from lwip_sendto):

1 poll current connection state
2 force connect state supplied by caller using netconn_connect
3 send data with lwip_send
4 restore previous polled connection state 

But this problem is more "application side" (or API safe-thread).

In your problem, if you have only one thread, the problem can't be the same.
Can you give me more informations about "the server responds so quickly to
the lwip_send() that the receive thread internal to lwIP is putting data into
the queue before the netconn_disconnect() can be added to the queue" ?

What kind of problem is? Crash, remote addr/port connection state corrupted?


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