[lwip-users] [lwip] sockets.c bug

[Jani Monoses]

Hi

in the BSD socket implementation in lwip_recvfrom()
the line
  sock->lastoffset = buflen - copylen;
should read
  sock->lastoffset = copylen;

otherwise when the application requests a read() with len smaller than
what has been already acked by the stack the address of the next byte to
read is not adjusted correctly.

So if 1000 bytes are acked and we ready 100 bytes, on next read we'll read
from byte 900 onwards instead of 100 loosing the 800 in between.

Jani

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