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Old 12-08-2008, 10:41 PM   #1
linuxtest
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Registered: Oct 2008
Posts: 4

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Reading the ip address from a packet raw sockets


Hi
I'm trying to read the ip address from a packet buffer from recvfrom, I can read the mac address but when i try the ip useing printf("%s",inet_itoa(ip->saddr)); it says wrong argument.
struct iphdr *ip;

I would perfer not to use libpcap. I've tryed to use sturct sockaddr_in *in printf("%s",inet_itoa(in->sin_addr)); ,and ip address is show ,but isn't correct

If you need anymore info just say.
Thanks
 
Old 12-09-2008, 03:46 PM   #2
nadroj
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Registered: Jan 2005
Location: Canada
Distribution: ubuntu
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this website has this information:
Quote:
printf("%-15s ", inet_ntoa(ip->saddr));

Compiling with "gcc -Wall -g -ansi -pedantic" result with a warning: "
incompatible type for argument 1 of `inet_ntoa' ". I came to know the
solution is to change the call into:

printf("%-15s ", inet_ntoa(*(struct in_addr *)&ip->saddr));
i think this is what your looking for. another website said that the inet_itoa is deprecated and suggests using inet_ntop to support ipv6.
 
Old 12-10-2008, 02:43 PM   #3
linuxtest
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Registered: Oct 2008
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Thanks nadroj
It(ntop)allows me to use ip->saddr and just needed to change *packetbuf to packetbuf.

Cheers dude.
 
  


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