88 lines
2.4 KiB
Bash
Executable File
88 lines
2.4 KiB
Bash
Executable File
#!/bin/sh
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NSENTER=$NSENTER
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NAME=$NAME-$COMMENT
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CHAIN=$CHAIN
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COMMENT=$COMMENT
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PROTOCOL=$TYPE
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VPN_IP=$VPN_IP
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VPN_NETWORK=$VPN_NETWORK
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##############################
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echo 1 > /proc/sys/net/ipv4/ip_forward
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##############################
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IPTABLES=/sbin/iptables-legacy
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###############################
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COUNT_SOURCE_IP=$(set |grep SOURCE_IP |wc -l)
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COUNT_SOURCE_PORT=$(set |grep SOURCE_PORT |wc -l)
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COUNT_TARGET_IP=$(set |grep TARGET_IP |wc -l)
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COUNT_TARGET_PORT=$(set |grep TARGET_PORT |wc -l)
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for source_ip_index in $(seq 1 $COUNT_SOURCE_IP) ; do
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if set |grep SOURCE_IP_ ; then
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SOURCE_IP=$(eval "echo \${"SOURCE_IP_$source_ip_index"}")
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fi
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for target_ip_index in $(seq 1 $COUNT_TARGET_IP) ; do
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if set |grep TARGET_IP_ ; then
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TARGET_IP=$(eval "echo \${"TARGET_IP_$target_ip_index"}")
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fi
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for target_port_index in $(seq 1 $COUNT_TARGET_PORT) ; do
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if set |grep TARGET_PORT_ ; then
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TARGET_PORT=$(eval "echo \${"TARGET_PORT_$target_port_index"}")
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fi
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#############################
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# NSENTER Specific settings #
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if [[ "$NSENTER" == "true" ]] ; then
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iptables="nsenter -t $(docker inspect --format {{.State.Pid}} $NAME) -n -- $IPTABLES -t nat";
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# DELETE UNECESSARY LINES FROM PREVIOUS RULES
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LINES=$($iptables --line-number -n | grep $VPN_NETWORK | awk '{print $1}'| tac)
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if [ -n "$LINES" ] ; then
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for i in $LINES; do
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$iptables -D $CHAIN $i
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sleep 0.1
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done
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fi
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$iptables -I POSTROUTING -m state --state established,related -j ACCEPT;
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$iptables -I PREROUTING -d $SOURCE_IP -p $PROTOCOL --dport $SOURCE_PORT -m comment --comment "$COMMENT" -j DNAT --to $TARGET_IP:$TARGET_PORT
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else
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if $IPTABLES --list $CHAIN |grep ESTABLISHED |grep RELATED|grep ACCEPT ; then
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echo "nothing to do";
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else $IPTABLES -I $CHAIN -m state --state established,related -j ACCEPT;
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fi
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#
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# DELETE UNECESSARY LINES FROM PREVIOUS RULES
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LINES=$($IPTABLES --line-number -n --list $CHAIN | grep $SOURCE_IP |grep $TARGET_IP |grep $PROTOCOL |grep $TARGET_PORT | awk '{print $1}'| tac)
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if [ -n "$LINES" ] ; then
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for i in $LINES; do
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$IPTABLES -D $CHAIN $i
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sleep 0.1
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done
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fi
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$IPTABLES -I $CHAIN -s $SOURCE_IP -d $TARGET_IP -p $PROTOCOL --dport $TARGET_PORT -m comment --comment "$COMMENT" -j ACCEPT
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#############################
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fi
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done # target_port
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done # target_ip
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done # source_ip
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