Bash脚本不工作带宽整形

Question

我希望这是一个简单的答案

问题：

1. 我将以下名为learn-address.sh的bash脚本放在以下文件夹中：

vi /etc/openvpn/netem/learn-address.sh

2. 在.conf文件中添加了以下(2)行：

script-security 3
learn-address /etc/openvpn/netem/learn-address.sh

3. 并将以下权限应用于学习地址脚本：

chmod 755 /etc/openvpn/netem/learn-address.sh

1. 但是，脚本确实会更新文件($ip.classid和$ip.dev)在tmp文件中，并正确地传递变量

2. 但是bash脚本不执行tc类和filter命令(qdisc没有更改)

3. 当用户连接到OpenVPN时调用学习地址脚本时，或者我遗漏了其他内容时，我会在脚本上使用什么权限来执行tc类和筛选器命令？

非常感谢

脚本名称：learn-address.sh

#!/bin/bash
statedir=/tmp/
function bwlimit-enable() {
ip=$1
user=$2
dev=eth0
# Disable if already enabled.
bwlimit-disable $ip
# Find unique classid.
if [ -f $statedir/$ip.classid ]; then
# Reuse this IP's classid
classid=`cat $statedir/$ip.classid`
else
if [ -f $statedir/last_classid ]; then
classid=`cat $statedir/last_classid`
classid=$((classid+1))
else
classid=1
fi
echo $classid > $statedir/last_classid
fi
# Find this user's bandwidth limit
# downrate: from VPN server to the client
# uprate: from client to the VPN server
if [ "$user" == "myuser" ]; then
downrate=10mbit
uprate=10mbit
elif [ "$user" == "anotheruser"]; then
downrate=2mbit
uprate=2mbit
else
downrate=5mbit
uprate=5mbit
fi
# Limit traffic from VPN server to client
tc class add dev $dev parent 1: classid 1:$classid htb rate $downrate
tc filter add dev $dev protocol all parent 1:0 prio 1 u32 match ip dst $ip/32 flowid 1:$classid
# Limit traffic from client to VPN server
tc filter add dev $dev parent ffff: protocol all prio 1 u32 match ip src $ip/32 police rate $uprate burst 80k drop flowid :$classid
# Store classid and dev for further use.
echo $classid > $statedir/$ip.classid
echo $dev > $statedir/$ip.dev
}
function bwlimit-disable() {
ip=$1
if [ ! -f $statedir/$ip.classid ]; then
return
fi
if [ ! -f $statedir/$ip.dev ]; then
return
fi
classid=`cat $statedir/$ip.classid`
dev=`cat $statedir/$ip.dev`
tc filter del dev $dev protocol all parent 1:0 prio 1 u32 match ip dst $ip/32
tc class del dev $dev classid 1:$classid
tc filter del dev $dev parent ffff: protocol all prio 1 u32 match ip src $ip/32
# Remove .dev but keep .classid so it can be reused.
rm $statedir/$ip.dev
}
# Make sure queueing discipline is enabled.
tc qdisc add dev $dev root handle 1: htb 2>/dev/null || /bin/true
tc qdisc add dev $dev handle ffff: ingress 2>/dev/null || /bin/true
case "$1" in
add|update)
bwlimit-enable $2 $3
;;
delete)
bwlimit-disable $2
;;
*)
echo "$0: unknown operation [$1]" >&2
exit 1
;;
esac
exit 0

Answer 1

此处对tc的调用发生在定义dev之前，稍后在解析函数参数并调用bwlimit-enable或bwlimit-disable之后发生。看起来你想转移这两个电话：

# Make sure queueing discipline is enabled.
tc qdisc add dev $dev root handle 1: htb 2>/dev/null || /bin/true
tc qdisc add dev $dev handle ffff: ingress 2>/dev/null || /bin/true

至案例陈述下方。