balance2isp/opennet_balancing.sh

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#!/bin/bash
# https://www.opennet.ru/docs/RUS/LARTC/x348.html
IF1=wifi0
IF2=wifi1
IF0=docker0
set -v
set -x
IP0=$(ip -o -4 addr show $IF0 | awk -F'(\\s|/)+' '{print $4}')
P0_NET=$(echo $IP0 | cut -d. -f1,2,3).0/24
IP1=$(ip -o -4 addr show $IF1 | awk -F'(\\s|/)+' '{print $4}')
P1_NET=$(echo $IP1 | cut -d. -f1,2,3).0/24
P1=$(ip route show dev $IF1 | awk '/default/ {print $3}')
[ -z "$P1" ] && P1=$(ip route ls | grep 'nexthop.*wifi0' | awk '{print $3}')
T1=81
IP2=$(ip -o -4 addr show $IF2 | awk -F'(\\s|/)+' '{print $4}')
P2_NET=$(echo $IP2 | cut -d. -f1,2,3).0/24
P2=$(ip route show dev $IF2 | awk '/default/ {print $3}')
[ -z "$P2" ] && P2=$(ip route ls | grep 'nexthop.*wifi1' | awk '{print $3}')
T2=82
# -- CLEAR --
ip route flush table $T2
ip rule del table $T2
ip route flush table $T1
ip rule del table $T1
ip route flush cache
# ---
ip route add $P1_NET dev $IF1 src $IP1 table T1
ip route add default via $P1 table T1
ip route add $P2_NET dev $IF2 src $IP2 table T2
ip route add default via $P2 table T2
ip route add $P1_NET dev $IF1 src $IP1
ip route add $P2_NET dev $IF2 src $IP2
ip route add default via $P1
for i in `seq 10`; do
ip rule del from $IP1 table T1 2>/dev/null
ip rule del from $IP2 table T2 2>/dev/null
done
ip rule add from $IP1 table T1
ip rule add from $IP2 table T2
ip route add $P0_NET dev $IF0 table T1
ip route add $P2_NET dev $IF2 table T1
ip route add 127.0.0.0/8 dev lo table T1
ip route add $P0_NET dev $IF0 table T2
ip route add $P1_NET dev $IF1 table T2
ip route add 127.0.0.0/8 dev lo table T2
route del default gw $P1 $IF1 2>/dev/null
route del default gw $P1 $IF1 2>/dev/null
route del default gw $P2 $IF2 2>/dev/null
route del default gw $P2 $IF2 2>/dev/null
ip route del default via $P1 dev $IF1 2>/dev/null
ip route del default via $P2 dev $IF2 2>/dev/null
ip route add default scope global \
nexthop via $P1 dev $IF1 weight 1 \
nexthop via $P2 dev $IF2 weight 1