Thanks! I was reading the Net::Ping module, and it looks like something like 
# SOL_IP = 0, IP_TOS = 1
setsockopt(S, 0, 1, pack("I*", $tos));

[download]
should work too...

In reply to Re^2: DSCP/TOS byte marking? by Marcelo
in thread DSCP/TOS byte marking? by Marcelo

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