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39a676c496
Signed-off-by: Chip Childers <chip.childers@gmail.com> I've assumed that Gavin's commit is appropriate, based on an assumption that we will keep these files in the source tree. If https://issues.apache.org/jira/browse/LEGAL-146 results in a different opionion from the members, then we will end up having to do something more drastic anyway.
125 lines
3.2 KiB
Bash
Executable File
125 lines
3.2 KiB
Bash
Executable File
#!/usr/bin/env bash
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# Licensed to the Apache Software Foundation (ASF) under one
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# or more contributor license agreements. See the NOTICE file
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# distributed with this work for additional information
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# regarding copyright ownership. The ASF licenses this file
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# to you under the Apache License, Version 2.0 (the
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# "License"); you may not use this file except in compliance
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# with the License. You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing,
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# software distributed under the License is distributed on an
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# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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# KIND, either express or implied. See the License for the
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# specific language governing permissions and limitations
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# under the License.
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# @VERSION@
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source /root/func.sh
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source /opt/cloud/bin/vpc_func.sh
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lock="biglock"
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locked=$(getLockFile $lock)
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if [ "$locked" != "1" ]
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then
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exit 1
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fi
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usage() {
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printf "Usage: %s: (-A|-D) -r <target-instance-ip> -l <public ip address> -d < eth device> \n" $(basename $0) >&2
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}
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#set -x
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vpnoutmark="0x525"
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static_nat() {
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local op=$1
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local publicIp=$2
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local instIp=$3
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local op2="-D"
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local tableNo=${ethDev:3}
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logger -t cloud "$(basename $0): static nat: public ip=$publicIp \
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instance ip=$instIp op=$op"
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#if adding, this might be a duplicate, so delete the old one first
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[ "$op" == "-A" ] && static_nat "-D" $publicIp $instIp
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# the delete operation may have errored out but the only possible reason is
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# that the rules didn't exist in the first place
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[ "$op" == "-A" ] && op2="-I"
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if [ "$op" == "-A" ]
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then
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# put static nat rule one rule after VPN no-NAT rule
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# rule chain can be used to improve it later
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iptables-save -t nat|grep "POSTROUTING" | grep $vpnoutmark > /dev/null
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if [ $? -eq 0 ]
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then
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rulenum=2
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else
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rulenum=1
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fi
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fi
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# shortcircuit the process if error and it is an append operation
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# continue if it is delete
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(sudo iptables -t nat $op PREROUTING -d $publicIp -j DNAT \
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--to-destination $instIp &>> $OUTFILE || [ "$op" == "-D" ]) &&
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# add mark to force the package go out through the eth the public IP is on
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#(sudo iptables -t mangle $op PREROUTING -s $instIp -j MARK \
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# --set-mark $tableNo &> $OUTFILE || [ "$op" == "-D" ]) &&
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(sudo iptables -t nat $op2 POSTROUTING $rulenum -o $ethDev -s $instIp -j SNAT \
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--to-source $publicIp &>> $OUTFILE )
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result=$?
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logger -t cloud "$(basename $0): done static nat entry public ip=$publicIp op=$op result=$result"
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if [ "$op" == "-D" ]
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then
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return 0
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fi
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return $result
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}
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rflag=
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lflag=
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dflag=
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op=""
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while getopts 'ADr:l:' OPTION
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do
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case $OPTION in
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A) op="-A"
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;;
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D) op="-D"
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;;
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r) rflag=1
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instanceIp="$OPTARG"
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;;
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l) lflag=1
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publicIp="$OPTARG"
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;;
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?) usage
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unlock_exit 2 $lock $locked
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;;
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esac
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done
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ethDev=$(getEthByIp $publicIp)
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result=$?
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if [ $result -gt 0 ]
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then
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if [ "$op" == "-D" ]
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then
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removeRulesForIp $publicIp
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unlock_exit 0 $lock $locked
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else
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unlock_exit $result $lock $locked
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fi
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fi
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OUTFILE=$(mktemp)
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static_nat $op $publicIp $instanceIp
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result=$?
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unlock_exit $result $lock $locked
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