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|
#!/bin/sh
# the next line finds ns \
nshome=`dirname $0`; [ ! -x $nshome/ns ] && [ -x ../../ns ] && nshome=../..
# the next line starts ns \
export nshome; exec $nshome/ns "$0" "$@"
if [info exists env(nshome)] {
set nshome $env(nshome)
} elseif [file executable ../../ns] {
set nshome ../..
} elseif {[file executable ./ns] || [file executable ./ns.exe]} {
set nshome "[pwd]"
} else {
puts "$argv0 cannot find ns directory"
exit 1
}
set env(PATH) "$nshome/bin:$env(PATH)"
#source $nshome/tcl/lan/ns-lan.tcl
source $nshome/tcl/http/http.tcl
set opt(trsplit) "-"
set opt(tr) out
set opt(namtr) ""
set opt(stop) 20
set opt(node) 3
set opt(seed) 0
set opt(bw) 1.8Mb
set opt(delay) 1ms
set opt(ll) LL
set opt(ifq) Queue/DropTail
set opt(mac) Mac/Csma/Cd
set opt(chan) Channel
set opt(tcp) TCP/Reno
set opt(sink) TCPSink
# number of traffic source (-1 means the number of nodes $opt(node))
set opt(telnet) 0
set opt(cbr) 0
set opt(ftp) 0
set opt(http) -1
set opt(webModel) $nshome/tcl/http/data
set opt(maxConn) 4
set opt(phttp) 0
if {$argc == 0} {
puts "Usage: $argv0 \[-stop sec\] \[-seed value\] \[-node numNodes\]"
puts "\t\[-tr tracefile\] \[-g\]"
puts "\t\[-ll lltype\] \[-ifq qtype\] \[-mac mactype\]"
puts "\t\[-bw $opt(bw)] \[-delay $opt(delay)\]"
exit 1
}
proc getopt {argc argv} {
global opt
for {set i 0} {$i < $argc} {incr i} {
set key [lindex $argv $i]
if ![string match {-*} $key] continue
set key [string range $key 1 end]
set val [lindex $argv [incr i]]
set opt($key) $val
if [string match {-[A-z]*} $val] {
incr i -1
continue
}
switch $key {
ll { set opt($key) LL/$val }
ifq { set opt($key) Queue/$val }
mac { set opt($key) Mac/$val }
}
}
}
proc finish {} {
global env nshome pwd
global ns opt trfd
$ns flush-trace
close $trfd
foreach key {node bw delay ll ifq mac seed} {
lappend comment $opt($key)
}
exec perl $nshome/bin/trsplit -tt r -pt tcp -c "$comment" \
$opt(trsplit) $opt(tr) >& $opt(tr)-bw
exec head -1 $opt(tr)-bw >@ stdout
if [info exists opt(g)] {
catch "exec xgraph -nl -M -display $env(DISPLAY) \
[lsort [glob $opt(tr).*]] &"
}
exit 0
}
proc create-trace {} {
global ns opt
if {[info exists opt(f)] || [info exists opt(g)]} {
set opt(trsplit) "-f"
}
if [file exists $opt(tr)] {
exec touch $opt(tr).
eval exec rm -f $opt(tr) $opt(tr)-bw [glob $opt(tr).*]
}
set trfd [open $opt(tr) w]
$ns trace-all $trfd
if {$opt(namtr) != ""} {
$ns namtrace-all [open $opt(namtr) w]
}
return $trfd
}
proc create-topology {} {
global ns opt
global lan node source
# Nodes:
# 0 a router from LAN to external network
# 1 to n nodes on the LAN
# n+1 node outside of the LAN,
set num $opt(node)
set node(0) [$ns node]
for {set i 1} {$i <= $num} {incr i} {
set node($i) [$ns node]
lappend nodelist $node($i)
}
set node($i) [$ns node]
$ns duplex-link $node(0) $node($i) 10Mb 50ms DropTail
set lan [$ns newLan $nodelist $opt(bw) $opt(delay) -llType $opt(ll) \
-ifqType $opt(ifq) -macType $opt(mac)]
$lan addNode $node(0) $opt(bw) $opt(delay)
set ifq0 [[$lan netIface $node(0)] set ifq_]
$ifq0 set limit_ [expr $opt(node) * [$ifq0 set limit_]]
}
proc create-source {} {
global ns opt
global lan node source
if {$opt(webModel) != ""} {
create-webModel $opt(webModel)
}
# make node($num+1) the source of all connection
set src $node(0)
foreach ttype {http ftp cbr telnet} {
set num $opt($ttype)
if {$num < 0} {
set num $opt(node)
}
for {set i 0} {$i < $num} {incr i} {
set dst $node([expr 1 + $i % $opt(node)])
new_$ttype $i $src $dst
}
}
}
proc create-webModel path {
Http setCDF rvClientTime 0
# Http setCDF rvClientTime $path/HttpThinkTime.cdf
Http setCDF rvReqLen $path/HttpRequestLength.cdf
Http setCDF rvNumImg $path/HttpConnections.cdf
set rv [Http setCDF rvRepLen $path/HttpReplyLength.cdf]
Http setCDF rvImgLen $rv
}
proc new_http {i server client} {
global ns opt http webm
set webopt "-srcType $opt(tcp) -snkType $opt(sink) -phttp $opt(phttp) -maxConn $opt(maxConn)"
set http($i) [eval new Http $ns $client $server $webopt]
$ns at [expr 0 + $i/1000.0] "$http($i) start"
}
proc new_cbr {i src dst} {
global ns opt cbr
set cbr($i) [$ns create-connection CBR $src Null $dst 0]
$ns at [expr 0.0001 + $i/1000.0] "$cbr($i) start"
}
proc new_ftp {i src dst} {
global ns opt ftp
set tcp [$ns create-connection $opt(tcp) $src $opt(sink) $dst 0]
set ftp($i) [$tcp attach-source FTP]
$ns at [expr 0.0002 + $i/1000.0] "$ftp($i) start"
}
proc new_telnet {i src dst} {
global ns opt telnet
set tcp [$ns create-connection $opt(tcp) $src $opt(sink) $dst 0]
set telnet($i) [$tcp attach-source Telnet]
$ns at [expr 0.0003 + $i/1000.0] "$telnet($i) start"
}
## MAIN ##
getopt $argc $argv
if {$opt(seed) >= 0} { ns-random $opt(seed) }
if [info exists opt(qsize)] { Queue set limit_ $opt(qsize) }
set ns [new Simulator]
set trfd [create-trace]
create-topology
$lan trace $ns $trfd
create-source
$ns at $opt(stop) "finish"
$ns run
|
