mptcp routing

mptcp - ifup:
-----------------------------------
#!/bin/sh
# A script for setting up routing tables for MPTCP in the N950.

# Copy this script into /etc/network/if-up.d/

set -e

env > /etc/network/if_up_env

if [ "$IFACE" = lo -o "$MODE" != start ]; then
        exit 0
fi

if [ -z $DEVICE_IFACE ]; then
        exit 0
fi

# FIRST, make a table-alias
if [ `grep $DEVICE_IFACE /etc/iproute2/rt_tables | wc -l` -eq 0 ]; then
        NUM=`cat /etc/iproute2/rt_tables | wc -l`
        echo "$NUM  $DEVICE_IFACE" >> /etc/iproute2/rt_tables
fi

if [ $DHCP4_IP_ADDRESS ]; then
        SUBNET=`echo $IP4_ADDRESS_0 | cut -d \   -f 1 | cut -d / -f 2`
        ip route add table $DEVICE_IFACE to $DHCP4_NETWORK_NUMBER/$SUBNET dev $DEVICE_IFACE scope link
        ip route add table $DEVICE_IFACE default via $DHCP4_ROUTERS dev $DEVICE_IFACE
        ip rule add from $DHCP4_IP_ADDRESS table $DEVICE_IFACE
else
        # static ip
        IPADDR=`echo $IP4_ADDRESS_0 | cut -d \   -f 1 | cut -d / -f 1`
        SUBNET=`echo $IP4_ADDRESS_0 | cut -d \   -f 1 | cut -d / -f 2`
        NETWITHMASK=`/usr/bin/ipcalc 192.168.1.54 | grep Network | cut -d" " -f 4`
        ip route add table $DEVICE_IFACE to $NETWITHMASK dev $DEVICE_IFACE scope link
        ip route add table $DEVICE_IFACE default via $IP4_GATEWAY dev $DEVICE_IP_IFACE
        ip rule add from $IPADDR table $DEVICE_IFACE
fi
-----------------------------------

mptcp-if-down:
-----------------------------------
#!/bin/sh
# A script for setting up routing tables for MPTCP in the N950.

# Copy this script into /etc/network/if-post-down.d/

set -e

env > /etc/network/if_down_env

if [ "$IFACE" = lo -o "$MODE" != stop ]; then
        exit 0
fi

ip rule del table $DEVICE_IFACE
ip route flush table $DEVICE_IFACE 
-----------------------------------

install transocsk:
https://github.com/cybozu-go/transocks

go get -u github.com/cybozu-go/transocks/...