[lwip-devel] [bug #24440] TCP connection close problem on 64-bit host

[Simon Goldschmidt]

Follow-up Comment #2, bug #24440 (project lwip):

> there's no need for an accept callback entry on a struct tcp_pcb

I'm afraid there is: when a new connection is opened by a listening pcb, the
accept pointer is copied to the new tcp_pcb. The reason is the callback is
only called after the ACK for the SYN is received from the remote host.

> tcp_accept() should take a struct tcp_pcb_listen type

But we need to reset the accept pointer for a normal pcb, too. I guess a
better fix would be to move accept into TCP_PCB_COMMON so that it is the same
for both tcp pcb types.

An even better fix would be to change the *_PCB_COMMON/IP_PCB defines to
aggregating other structs so that we are safe from compilers that change the
layout of structs, but that could well be another discussion...

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