Re: fprintf() and duplicate IP addresses

[SVisor <svisor@lycos.com>]

M.Baris Demiray wrote:

...
> addresses, if I use a single fprintf() they're printed as duplicates.
...
> fprintf(stdout, "%s:%d -> %s:%d  ", \
>         inet_ntoa(*(struct in_addr *)&ip_header->ip_src.s_addr), \
>         ntohs(tcp_header->source), \
>         inet_ntoa(*(struct in_addr *)&ip_header->ip_dst.s_addr), \
>         ntohs(tcp_header->dest));

I have nothing to back my suspection with. But probably inet_ntoa(...) 
uses an internal buffer.

printf( ) solves variables from the right, _before_ adding the result to 
the output (only the "pointer" to char* is saved), you only get the 
result from the first one (as they "point" to same memory).

// Jarmo