Re: [ECOS] Blocking while recv() with freebsd/openbsd tcp/ip-stack

[Jonathan Larmour <jifl at eCosCentric dot com>]

Roland Brühwiler wrote:
> Compiling the sources for the arm-bord with the freebsd or openbsd 
> tcp/ip stack is ok. No errors.
> After loading and continuing with arm-elf-gdb the software is starting.
> A client sends the hello-packet and the server (arm-board with 
> ecos/redboot) sends back the other handshake messages. After sending the 
> server-hello-done packet I want to read 5 Bytes from the tcp-connection. 
> But the server is blocking while I use the function recv(fd,buf,5,0) 
> although the client writes some bytes in the meantime. If I use the 
> MSG_NOWAIT-flag it isn't blocking but with wrong bytes.

It seems no-one has seen this before, which isn't to say there isn't a 
good reason, but it may be wise to check your client code, and also 
perhaps check that there are no stack overruns anywhere.

Only other debugging hints I have are enable assertions, and there are 
copious options in the low level drivers, generic eth drivers and net 
stacks to enable extra logging.

Jifl
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