> hi all,
> i'm stuck with a strange (for me) behaviour of recvfrom with UDP sockets.
> 1) in the man page, this error code is not documented (ok, they are rather
> old)
> 2) the sequence I try is that of a simple echo server (only for test):
>
> create AD_DGRAM socket
> while(select for fd with timeout==-1) {
> recvfrom(addr, buf, ...);
> sendto(addr, buf, ...)
> }
>
> the first time ok. I send a packet from another host, recv and send are
> done. but instead of going back to sleep, it wakes up again and gets an
> ECONNREFUSED error in recvfrom.
A previous packet you sent on that socket was sent to a host that
wasn't listening, it sent back and ICMP packet to this effect and it
gets reported later on...
Have a look at what's going on with tcpdump to see what I mean if my
explanation isn't clear (alan has a clearly explanation that mine).
-cw
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