#!/bin/sh
#
# $NetBSD: vif-bridge-nbsd,v 1.1 2005/10/01 02:10:10 xtraeme Exp $
#
#============================================================================
# @PKG_SYSCONFDIR@/vif-bridge
#
# Script for configuring a vif in bridged mode.
# Xend calls a vif script when bringing a vif up or down.
# This script is the default - but it can be configured for each vif.
#
# Example invocation:
#
# vif-bridge up domain=VM1 vif=xvif1.0 bridge=bridge0 ip="128.232.38.45/28 10.10.10.55/24"
#
#
# Usage:
# vif-bridge (up|down) {VAR=VAL}*
#
# Vars:
#
# domain  name of the domain the interface is on (required).
# vif     vif interface name (required).
# mac     vif MAC address (required).
# bridge  bridge to add the vif to (required).
# ip      list of IP networks for the vif, space-separated (optional).
#
# up:
# Enslaves the vif interface to the bridge and adds iptables rules
# for its ip addresses (if any).
#
# down:
# Removes the vif interface from the bridge and removes the iptables
# rules for its ip addresses (if any).
#============================================================================

# Exit if anything goes wrong
set -e

echo "vif-bridge $*"

# Operation name.
OP=$1
shift

# Pull variables in args into environment
for arg ; do export "${arg}" ; done

# Required parameters. Fail if not set.
domain=${domain:?}
vif=${vif:?}
mac=${mac:?}
bridge=${bridge:?}

# Are we going up or down?
case $OP in
    up)
        brcmd='add'
        ;;
    down)
        brcmd='delete'
        ;;
    *)
        echo 'Invalid command: ' $OP
        echo 'Valid commands are: up, down'
        exit 1
        ;;
esac

# Don't do anything if the bridge is "null".
if [ "${bridge}" = "null" ] ; then
    exit
fi

# Add/remove vif to/from bridge.
/sbin/brconfig ${bridge} ${brcmd} ${vif}
/sbin/ifconfig ${vif} $OP