#!/bin/bash -ex

# Create a venv-based virtual network for testing, consisting of:
#
# - venv0: Interface for the DHCP server (static address: 10.0.0.254/24)
# - venv1: Interface for DHCP client
# - br-dhcp: A bridge for communication between these interfaces

BR=br-dhcp
SERVERADDR="10.0.0.254/24"

brctl delbr $BR
brctl addbr $BR

for i in {0..1}; do
    IFNAME="veth${i}"
    PEERNAME="${IFNAME}s"

    ip link add "$IFNAME" type veth peer name "$PEERNAME"
    ip link set "$IFNAME" up
    ip link set "$PEERNAME" up

    brctl addif $BR "$PEERNAME"
done

ip addr add dev veth0 "$SERVERADDR"
ip link set "$BR" up