#hping softrealtime 1
source "hpingstdlib.htcl"

if {$argc != 1} {
	puts "usage: ping.htcl hostname"
	exit 1
}

set target [lindex $argv 0]
set targetip [hping resolve $target]

puts "PING $target ($targetip): 56 data bytes"

set outifaddr [hping outifa $targetip]
set outifname [outifname $targetip]
hping setfilter $outifname "icmp and host $targetip"

set icmp_id [expr int(rand()*65536)]
set icmp_seq 0
array set icmp_rtt_tab {}

proc send_icmp {} {
	after 1000 send_icmp
	global outifaddr targetip icmp_id icmp_seq icmp_rtt_tab
	append icmp "ip(saddr=$outifaddr,daddr=$targetip,ttl=255)+"
	append icmp "icmp(type=8,code=0,id=$icmp_id,seq=$icmp_seq)+"
	append icmp "data(str=[string repeat X 28])"
	set icmp_rtt_tab($icmp_seq) [clock clicks -milliseconds]
	hping send $icmp
	#puts "! $icmp_seq"
	incr icmp_seq
}

proc recv_icmp {} {
	global outifname outifaddr targetip icmp_id icmp_rtt_tab
	set packets [hping recv $outifname 0 1000]
	#puts [llength $packets]
	foreach p $packets {
		if {[GetIpSaddr $p] != $targetip} continue
		if {[GetIpDaddr $p] != $outifaddr} continue
		if {[GetIcmpType $p] != 0} continue
		if {[GetIcmpCode $p] != 0} continue
		if {[GetIcmpId $p] != $icmp_id} continue

		set seq [GetIcmpSeq $p]
		set ttl [GetIpTtl $p]
		set rtt [expr [clock clicks -milliseconds] - $icmp_rtt_tab($seq)]
		puts "xxx bytes from [GetIpSaddr $p]: icmp_seq=$seq ttl=$ttl time=$rtt.0 ms"
	}
	after 10 recv_icmp
}

hping recv $outifname 0

after 10 send_icmp
after idle recv_icmp
vwait forver

# vim: filetype=tcl