使用徐雷鸣书第七章的测试tcl代码得到的trace文件，
1、RTR路由层收到之后添加了一个20字节的IP头，所以包长度从512变为532
第6、7行，节点0又收到自己发出的包，所以，丢弃。Mflood.cc中使用ch->num_forwards() == 0来判断经过了几次转发，但是没有看到这个数递增啊？
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在第8行可以看到packet直接到了AGT层，一开始觉得有点奇怪，在node 0的时候从AGT到RTR层，在node2的时候是不是应该从RTR层到AGT层呢，这样才符合分层。但后来才想到，node的结构中的address classifier，这个会先判断address是否是本地节点的地址，如果是，就直接递交给AGT了可能，如果不是本地节点地址，才会将其递交给默认的255的RTR。
使用shell批量化处理，设置场景、流量、运行ns、awk处理实验数据
发个
#!/bin/bash
##############################################
# Shell grammar:
# test expr is logic expression
# lt means lower than
##############################################
i=1
while (test $i -lt 2)
do
scn/setdest -v 1 -n 50 -p 0 -M 5 -t 100 -x 1000 -y 1000 > scn/scene-50n-0p-5s-100t-1000-1000
ns scn/cbrgen.tcl -type cbr -nn 50 -seed $i -mc 30 -rate 1.0 > scn/cbr-50n-30c-1p
ns mflood-scene.tcl
awk -f getRatio.awk mflood-scene.tr
let i=i+1
done
tcl代码为徐雷鸣书中代码
#Agent/UDP set packetSize_ 6000# ======================================================================
# Define options
# ======================================================================
set val(chan)Channel/WirelessChannel
set val(prop)Propagation/TwoRayGround
set val(netif)Phy/WirelessPhy
set val(mac)Mac/802_11
set val(ifq)Queue/DropTail/PriQueue
set val(ll)LL
set val(ant)Antenna/OmniAntennaset val(x)1200;
# X dimension of the topography
set val(y)1200;
# Y dimension of the topography
set val(ifqlen)50;
# max packet in ifq
set val(seed)0.0
set val(rp)MFlood
set val(nn)50;
# how many nodes are simulated
set val(cp)"scn/cbr-50n-30c-1p"
set val(sc)"scn/scene-50n-0p-5s-100t-1000-1000"
set val(stop)100# ======================================================================
# Main Program
# ======================================================================#ns-random 0# Initialize Global Variables
set ns_ [new Simulator]
set tracefd [open mflood-scene.tr w]
$ns_ trace-all $tracefd# set up topography
set topo [new Topography]
$topo load_flatgrid $val(x) $val(y)set namtrace[open mflood-scene.nam w]
$ns_ namtrace-all-wireless $namtrace $val(x) $val(y)#
# Create God
#
set god_ [create-god $val(nn)]# Create the specified number of mobilenodes [$val(nn)] and "attach" them
# to the channel.
# configure node
set channel [new Channel/WirelessChannel]
$channel set errorProbability_ 0.0$ns_ node-config -adhocRouting $val(rp) \
-llType $val(ll) \
-macType $val(mac) \
-ifqType $val(ifq) \
-ifqLen $val(ifqlen) \
-antType $val(ant) \
-propType $val(prop) \
-phyType $val(netif) \
-channel $channel \
-topoInstance $topo \
-agentTrace ON \
-routerTrace ON\
-macTrace OFF \
-movementTrace OFF for {set i 0} {$i < $val(nn) } {incr i} {
set node_($i) [$ns_ node]
$node_($i) random-motion 0;
}#
# Define node movement model
#
puts "Loading connection pattern..."
source $val(cp)#
# Define traffic model
#
puts "Loading scenario file..."
source $val(sc)# Define node initial position in namfor {set i 0} {$i < $val(nn)} {incr i} {# 20 defines the node size in nam, must adjust it according to your scenario
# The function must be called after mobility model is defined$ns_ initial_node_pos $node_($i) 20
}# Tell nodes when the simulation ends
for {set i 0} {$i < $val(nn) } {incr i} {
$ns_ at $val(stop).0 "$node_($i) reset";
}$ns_ at $val(stop).0 "stop"
$ns_ at $val(stop).01 "puts \"NS EXITING...\" ;
$ns_ halt"proc stop {} {
global ns_ tracefd namtrace
$ns_ flush-trace
close $tracefd
close $namtrace
exit 0
}puts "Starting Simulation..."
$ns_ run
getRatio.awk文件为徐雷鸣书中代码，添加了部分注释
##########################################################
# awk grammar: exp ~ /regexp/ 如果exp符合regexp，结果为真
# awk grammar: exp !~ /regexp/ 如果exp不符合regexp，结果为真
# regular expression:
#^脱字符，只能匹配位于行首的字符串
#.与任意字符匹配
#*与任意0或n个字符匹配
#.*与任意数量字符串匹配
##########################################################BEGIN {
sendLine = 0;
recvLine = 0;
fowardLine = 0;
if(mseq==0)# 如果没有指定最大seq，则定为1000
mseq=10000;
for(i=0;
i输出结果：
cbr s:1169 r:809, r/sRatio:0.6920, f:38242
上面是分析整个的吞吐量，下面分析某对源节点和目的节点：
awk -v src=https://www.it610.com/article/1 -v dst=2 -voutfile=1-2data -f getNodeRecv.awk mflood-scene.tr
getNodeRecv.awk文件：
# getNodeRecv.awkBEGIN {
if(step ==0)
step = 10;
base = 0;
start = 0;
bytes = 0;
total_bytes = 0;
max = 0;
calc = 0;
}$0 ~/^s.* AGT/ {
if (base == 0 && $3 == ("_" src "_")) {
base = $2;
start = $2;
calc = 1;
}
}$0 ~/^r.* AGT/ && calc == 1{
time = $2;
# 没看明白怎么统计的
# 上一个正则表达式只是为了得到开始发送的时刻
# 第一个时段肯定为0，因为byte还没有加
# 以后的时段，将base定为当前加step，
# 然后，time一点一点加，同时统计dst收到多少src的包
# 当time超过step之后，计算上一时段的吞吐率
# time --> --> --> -->
# base+step |
if (time > base) {
bw = bytes/(step * 1000.0);
if (max < bw)
max = bw;
printf "%.9f %.9f\n", base, bw >> outfile;
base += step;
bytes = 0;
}
# dst收到多少src发出的包
# match [31:0 .与任意字符匹配
if ($3 == ("_" dst "_") && match($14,"." src ":") >=0 ) {
total_bytes += $8;
bytes += $8;
}
}END {
if (total_bytes)
printf "# Avg B/w = %.3fKB/s\n", ((total_bytes/1000.0)/(time-start)) >> outfile;
else
printf "Avg B/w = 0.0KB/s\n";
printf "# Max B/w = %.3fKB/s\n", max >> outfile;
}
Plot.sh代码：
#!/bin/bashgnuplot -persist<2" with linespointsEOF
绘图：
【徐雷鸣书中MFlood部分测试代码学习笔记】
文章图片
