netnamespace

#!/bin/bash
#pered nastroikoi otkluchit' NetworkManager k heram!!!

wait_to()
{
    L_MESS=$1
    L_DEV=$2
    L_ST=$3
    L_TIME=$4
    L_NS=$5
    L_LOOP=0
    L_RETCODE=666

    echo -n $L_MESS
    while [ $L_LOOP -eq 0 ];do
    echo -n "."
    if [ -z $L_NS  ]; then
        ./ndstatus $L_DEV -s
        L_RETCODE=$?
    else
        ip netns exec $L_NS ./ndstatus $L_DEV -s
        L_RETCODE=$?
    fi

    if [[ "$L_ST"=="up" ]]; then
        if [ $L_RETCODE -eq 0 ]; then
        L_LOOP=1
        echo
        fi
    fi
        if [[ "$L_ST"=="down" ]]; then
        if [ $L_RETCODE -eq 1 ]; then
        L_LOOP=1
        echo
        fi
    fi

    sleep 1
    let L_TIME=L_TIME-1
    if [ $L_TIME -lt 0 ]; then
        echo
        echo "Oops, something wrong..."
        sleep 10
        L_LOOP=1
    fi
    done
}

echo "Adding  namespace..."
ip netns add provns

echo "Configure virtual network card..."
ip link add veth0 type veth peer name veth1
ifconfig veth0 0.0.0.0 up
ip link set veth1 netns provns

ifconfig eth0 down
wait_to "Down network card..." eth0 down 5
ifconfig eth0 0.0.0.0 up
wait_to "Up network card..." eth0 up 5

echo "Configure bridge..."
brctl addbr br0
brctl addif br0 eth0 veth0
ifconfig br0 10.10.0.119 netmask 255.255.0.0 up
wait_to  "Up bridge..." br0 up 7

#echo "Delete default route..."
#ip route del default
echo "Add default route..."
ip route add default via 10.10.0.10 dev br0 src 10.10.0.119

ip netns exec provns ifconfig veth1 10.10.0.120 netmask 255.255.0.0
wait_to "Configure namespace. Up virtual network card..." veth1 up 5 provns
echo "Set default route for namespace..."
ip netns exec provns ip route add default via 10.10.0.10 dev veth1  src 10.10.0.120
echo "Configure lo interface..."
ip netns exec provns ifconfig lo 127.0.0.1
echo "Network namespace configured!"