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Old 10-10-2011, 04:09 PM   #1
greyblake
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Registered: Oct 2010
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Finding active computer in local network.


Hi guys!
How can I find out what computers in my local network? I need to implement something similar to this:
Quote:
nmap -sP 192.168.0.0/24
But need to implement it using pure C code without calling system().

nmap works pretty fast it doesn't look like it uses usual ping.

Thanks.
 
Old 10-10-2011, 06:09 PM   #2
sunnydrake
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grab source code of nmap and dig..
probably multicast ICMP packet or just inject bunch of ARP 223 12.449143 Casa_01:a9:4f Broadcast ARP Who has xxx.xxx.xxx.30? Tell xxx.xxx.xxx.1?
grab wireshark and look
 
Old 10-10-2011, 06:12 PM   #3
macemoneta
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You can just read /proc/net/arp and ignore entries with 00:00:00:00:00:00.
 
  


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