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#!/bin/bash | |
# Example: | |
# | |
# auto tun0 | |
# iface tun0 inet static | |
# address 192.168.99.10 | |
# netmask 255.255.255.255 | |
# fakenet 192.168.99.0/24 | |
# table 10000 10001 | |
# rspec 192.168.99.10:10.99.0.10:10.99.1.10 \ | |
# 192.168.99.20:10.99.0.20:10.99.1.20 | |
# pre-up ip tuntap add mode tun tun0 | |
# post-down ip tuntap del mode tun tun0 | |
if [ -z ${IF_TABLE+x} ]; then | |
exit 0 | |
fi | |
count=0 | |
for table in ${IF_TABLE[@]}; do | |
ip route flush table $table | |
ip rule delete lookup $table || true | |
count=$((count+1)) | |
done | |
for spec in ${IF_RSPEC[@]}; do | |
IFS=':' read -ra addr <<< $spec | |
dst=${addr[0]} | |
addr=("${addr[@]:1}") | |
ecmp_str="" | |
for table in ${IF_TABLE[@]}; do | |
gw=${addr[0]} | |
addr=("${addr[@]:1}") | |
if [ -n "$gw" ]; then | |
ip route add $dst via $gw src $IF_ADDRESS table $table | |
ecmp_str="$ecmp_str nexthop via $gw" | |
fi | |
done | |
ip route del $dst || true | |
ip route add $dst src $IF_ADDRESS $ecmp_str | |
done | |
iptables -t mangle -F | |
mark=0 | |
for table in ${IF_TABLE[@]}; do | |
mark=$((mark+1)) | |
iptables -t mangle -A OUTPUT -d $IF_FAKENET \ | |
-m statistic --mode nth --every $count --packet $((mark-1)) \ | |
-j MARK --set-mark $mark | |
ip rule delete fwmark $mark || true | |
ip rule add fwmark $mark lookup $table | |
done |
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