help with sending ICMP message

[Anonymous]

Hi,

I'm trying to build my own ICMP message (not hacking)
for some testing in my lab.  Normally when I generate custom UDP
datagrams, I do a sendto() with a raw socket (w/ IP_HDRINCL).
I just fill in a sockaddr_in struct and pass it to sendto().

My question is that if I use a sockaddr struct for ICMP messages,
what do I fill in for the sa_data field?

Thanks,
Tuan



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