Help with reading strace

[Andy Green]

Dan Track wrote:

> sin_addr=inet_addr("10.11.10.1")}, 28) = 0
> fcntl64(4, F_GETFL)                     = 0x2 (flags O_RDWR)
> fcntl64(4, F_SETFL, O_RDWR|O_NONBLOCK)  = 0
> gettimeofday({1143022459, 869414}, NULL) = 0
> poll([{fd=4, events=POLLOUT, revents=POLLOUT}], 1, 0) = 1
> send(4, "\367\201\1\0\0\1\0\0\0\0\0\0\7neptune\2l3\next"..., 43, 0) = 43
> poll(
> 
> 
> 
> 
> 
> [{fd=4, events=POLLIN}], 1, 5000)  = 0

AIUI this is just telling you that poll blocked.  Use

tcpdump

to see what actually happens on the wire to provoke the blocking action, 
eg, ARP requests that are never satisfied?

-Andy
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