测试源代码的作用如何

UPWAN1=90000 DOWNWAN1=90000 OTHERUPOne=60 OTHERDOWNOne=60 OTHERUPTwo=30 OTHERDOWNTwo=30 OTHERUPThree=10 OTHERDOWNThree=10 OTHERUPMax=90 OTHERDOWNMax=90 insmod imq insmod ipt_IMQ ifconfig imq0 up ifconfig imq1 up insmod xt_web.ko insmod xt_length.ko insmod xt_hashlimit.ko wan1=$(nvram get wan_iface) iptables -t mangle -N QOSDOWN iptables -t mangle -N QOSUP iptables -t mangle -F QOSDOWN iptables -t mangle -F QOSUP iptables -t mangle -F FORWARD iptables -t mangle -I FORWARD -j IPTRAFFIC_I iptables -t mangle -I FORWARD -i br0 -j QOSDOWN iptables -t mangle -I FORWARD -o br0 -j QOSUP iptables -t mangle -A FORWARD -i br0 -j IMQ --todev 1 iptables -t mangle -A FORWARD -o br0 -j IMQ --todev 0 DOWNOTHEROne=$(($DOWNWAN1*$OTHERDOWNOne/100)) UPOTHEROne=$(($UPWAN1*$OTHERUPOne/100)) DOWNOTHERTwo=$(($DOWNWAN1*$OTHERDOWNTwo/100)) UPOTHERTwo=$(($UPWAN1*$OTHERUPTwo/100)) DOWNOTHERThree=$(($DOWNWAN1*$OTHERDOWNThree/100)) UPOTHERThree=$(($UPWAN1*$OTHERUPThree/100)) DOWNOTHERMax=$(($DOWNWAN1*$OTHERDOWNMax/100)) UPOTHERMax=$(($UPWAN1*$OTHERUPMax/100)) DOWN=$(($DOWNOTHEROne)) UP=$(($UPOTHEROne)) DOWNWEB=$(($DOWNOTHERTwo)) UPWEB=$(($UPOTHERTwo)) DOWNP2P=$(($DOWNOTHERThree)) UPP2P=$(($UPOTHERThree)) DOWNLITTLE=$(($DOWN*20/100)) DOWNSYN=$(($DOWN*20/100)) DOWNGUA=$(($DOWN*60/100)) DOWNWWW=$(($DOWNWEB*60/100)) DOWNMEDIA=$(($DOWNWEB*40/100)) DOWNDOWN=$(($DOWNP2P*60/100)) DOWNDOWNP2P=$(($DOWNP2P*40/100)) UPLITTLE=$(($UP*20/100)) UPSYN=$(($UP*20/100)) UPGUA=$(($UP*60/100)) UPWWW=$(($UPWEB*60/100)) UPMEDIA=$(($UPWEB*40/100)) UPUP=$(($UPP2P*60/100)) UPUPP2P=$(($UPP2P*40/100)) tc qdisc del dev imq1 root tc qdisc add dev imq1 root handle 1: htb default 50 r2q 2 tc class add dev imq1 parent 1: classid 1:11 htb rate ${DOWN}kbps ceil ${DOWN}kbps prio 0 tc class add dev imq1 parent 1: classid 1:12 htb rate ${DOWNWEB}kbps ceil ${DOWNOTHERMax}kbps prio 1 tc class add dev imq1 parent 1: classid 1:13 htb rate ${DOWNP2P}kbps ceil ${DOWNOTHERMax}kbps prio 1 tc class add dev imq1 parent 1:11 classid 1:10 htb rate ${DOWNLITTLE}kbps ceil ${DOWN}kbps prio 0 tc class add dev imq1 parent 1:11 classid 1:20 htb rate ${DOWNSYN}kbps ceil ${DOWN}kbps prio 1 tc class add dev imq1 parent 1:11 classid 1:40 htb rate ${DOWNGUA}kbps ceil ${DOWN}kbps prio 2 tc class add dev imq1 parent 1:12 classid 1:50 htb rate ${DOWNWWW}kbps ceil ${DOWNOTHERMax}kbps prio 0 tc class add dev imq1 parent 1:12 classid 1:30 htb rate ${DOWNMEDIA}kbps ceil ${DOWNOTHERMax}kbps prio 1 tc class add dev imq1 parent 1:13 classid 1:80 htb rate ${DOWNDOWN}kbps ceil ${DOWNOTHERMax}kbps prio 0 tc class add dev imq1 parent 1:13 classid 1:90 htb rate ${DOWNDOWNP2P}kbps ceil ${DOWNOTHERMax}kbps prio 1 tc qdisc add dev imq1 parent 1:10 handle 10: sfq perturb 10 tc qdisc add dev imq1 parent 1:20 handle 20: sfq perturb 10 tc qdisc add dev imq1 parent 1:30 handle 30: sfq perturb 10 tc qdisc add dev imq1 parent 1:40 handle 40: sfq perturb 10 tc qdisc add dev imq1 parent 1:50 handle 50: sfq perturb 10 tc qdisc add dev imq1 parent 1:80 handle 80: sfq perturb 10 tc qdisc add dev imq1 parent 1:90 handle 90: sfq perturb 10 tc filter add dev imq1 parent 1: protocol ip handle 1 fw flowid 1:10 tc filter add dev imq1 parent 1: protocol ip handle 2 fw flowid 1:20 tc filter add dev imq1 parent 1: protocol ip handle 3 fw flowid 1:30 tc filter add dev imq1 parent 1: protocol ip handle 4 fw flowid 1:40 tc filter add dev imq1 parent 1: protocol ip handle 5 fw flowid 1:50 tc filter add dev imq1 parent 1: protocol ip handle 8 fw flowid 1:80 tc filter add dev imq1 parent 1: protocol ip handle 9 fw flowid 1:90 tc qdisc del dev imq0 root tc qdisc add dev imq0 root handle 1: htb default 50 tc class add dev imq0 parent 1: classid 1:11 htb rate ${UP}kbps ceil ${UP}kbps prio 0 tc class add dev imq0 parent 1: classid 1:12 htb rate ${UPWEB}kbps ceil ${UPOTHERMax}kbps prio 1 tc class add dev imq0 parent 1: classid 1:13 htb rate ${UPP2P}kbps ceil ${UPOTHERMax}kbps prio 1 tc class add dev imq0 parent 1:11 classid 1:10 htb rate ${UPLITTLE}kbps ceil ${UP}kbps prio 0 tc class add dev imq0 parent 1:11 classid 1:20 htb rate ${UPSYN}kbps ceil ${UP}kbps prio 1 tc class add dev imq0 parent 1:11 classid 1:40 htb rate ${UPGUA}kbps ceil ${UP}kbps prio 2 tc class add dev imq0 parent 1:12 classid 1:50 htb rate ${UPWWW}kbps ceil ${UPOTHERMax}kbps prio 0 tc class add dev imq0 parent 1:12 classid 1:30 htb rate ${UPMEDIA}kbps ceil ${UPOTHERMax}kbps prio 1 tc class add dev imq0 parent 1:13 classid 1:80 htb rate ${UPUP}kbps ceil ${UPOTHERMax}kbps prio 0 tc class add dev imq0 parent 1:13 classid 1:90 htb rate ${UPUPP2P}kbps ceil ${UPOTHERMax}kbps prio 1 tc qdisc add dev imq0 parent 1:10 handle 10: sfq perturb 10 tc qdisc add dev imq0 parent 1:20 handle 20: sfq perturb 10 tc qdisc add dev imq0 parent 1:30 handle 30: sfq perturb 10 tc qdisc add dev imq0 parent 1:40 handle 40: sfq perturb 10 tc qdisc add dev imq0 parent 1:50 handle 50: sfq perturb 10 tc qdisc add dev imq0 parent 1:80 handle 80: sfq perturb 10 tc qdisc add dev imq0 parent 1:90 handle 90: sfq perturb 10 tc filter add dev imq0 parent 1: protocol ip handle 1 fw flowid 1:10 tc filter add dev imq0 parent 1: protocol ip handle 2 fw flowid 1:20 tc filter add dev imq0 parent 1: protocol ip handle 3 fw flowid 1:30 tc filter add dev imq0 parent 1: protocol ip handle 4 fw flowid 1:40 tc filter add dev imq0 parent 1: protocol ip handle 5 fw flowid 1:50 tc filter add dev imq0 parent 1: protocol ip handle 8 fw flowid 1:80 tc filter add dev imq0 parent 1: protocol ip handle 9 fw flowid 1:90 iptables -t mangle -A QOSDOWN -j CONNMARK --restore-mark iptables -t mangle -A QOSDOWN -m mark --mark 3 -j RETURN iptables -t mangle -A QOSDOWN -p ! tcp -m length --length :256 -j MARK --set-mark-return 1 iptables -t mangle -A QOSDOWN -p ! tcp -m hashlimit --hashlimit 20/sec --hashlimit-burst 100 --hashlimit-mode dstip --hashlimit-name fastconn_down -j MARK --set-mark-return 4 iptables -t mangle -A QOSDOWN -p ! tcp -j MARK --set-mark-return 9 iptables -t mangle -A QOSDOWN -p tcp --syn -j MARK --set-mark-return 2 iptables -t mangle -A QOSDOWN -p tcp --sport 443 -j MARK --set-mark-return 5 iptables -t mangle -A QOSDOWN -p tcp --sport ! 80 -m state --state ESTABLISHED -m length --length :256 -j MARK --set-mark-return 1 iptables -t mangle -A QOSDOWN -p tcp --sport ! 80 -m hashlimit --hashlimit 20/sec --hashlimit-burst 100 --hashlimit-mode dstip --hashlimit-name fastconn_down -j MARK --set-mark-return 4 iptables -t mangle -A QOSDOWN -p tcp --sport ! 80 -j MARK --set-mark-return 9 iptables -t mangle -A QOSDOWN -p tcp --sport 80 -j BCOUNT iptables -t mangle -A QOSDOWN -p tcp --sport 80 -m bcount --range :500000 -j CONNMARK --set-return 0x5/0xff iptables -t mangle -A QOSDOWN -p tcp --sport 80 -m bcount --range 500001: -j CONNMARK --set-return 0x8/0xff iptables -t mangle -A QOSUP -j CONNMARK --restore-mark iptables -t mangle -A QOSUP -m mark --mark 3 -j RETURN iptables -t mangle -A QOSUP -p ! tcp -m length --length :256 -j MARK --set-mark-return 1 iptables -t mangle -A QOSUP -p ! tcp -m hashlimit --hashlimit 15/sec --hashlimit-burst 100 --hashlimit-mode srcip --hashlimit-name fastconn_up -j MARK --set-mark-return 4 iptables -t mangle -A QOSUP -p ! tcp -j MARK --set-mark-return 9 iptables -t mangle -A QOSUP -p tcp -m web --path ".flv .mp4 .f4v .swf" -j CONNMARK --set-return 0x3/0xff iptables -t mangle -A QOSUP -j CONNMARK --restore-mark iptables -t mangle -A QOSUP -m mark --mark 3 -j RETURN iptables -t mangle -A QOSUP -p tcp --syn -j MARK --set-mark-return 2 iptables -t mangle -A QOSUP -p tcp --dport 443 -j MARK --set-mark-return 5 iptables -t mangle -A QOSUP -p tcp --dport ! 80 -m length --length :256 -j MARK --set-mark-return 1 iptables -t mangle -A QOSUP -p tcp --dport ! 80 -m hashlimit --hashlimit 15/sec --hashlimit-burst 100 --hashlimit-mode srcip --hashlimit-name fastconn_up -j MARK --set-mark-return 4 iptables -t mangle -A QOSUP -p tcp --dport ! 80 -j MARK --set-mark-return 9 iptables -t mangle -A QOSUP -p tcp --dport 80 -j BCOUNT iptables -t mangle -A QOSUP -p tcp --dport 80 -m bcount --range :40000 -j MARK --set-mark-return 5 iptables -t mangle -A QOSUP -p tcp --dport 80 -m bcount --range 40001: -j MARK --set-mark-return 8