#!/bin/ash
#
# Network hotplug policy agent for Linux 2.4 kernels
#
# Kernel NET hotplug params include:
#	
#	ACTION=%s [register or unregister]
#	INTERFACE=%s
#
# HISTORY:
#
# 23-Jun-2005   Enabled resume for waking up USB devices
# 23-Mar-2005   Added usb ethernet support (eth0)
# 25-Feb-2001	Special case ppp and similar (redhat)
# 23-Jan-2001	Log invocation of "ifup" if debugging
# 04-Jan-2001	Initial version of "new" hotplug agent.
#
# $Id: net.agent,v 1.1 2004/06/23 11:31:47 namikosi Exp $
#

HOTPLUG_DIR=/etc/hotplug
cd ${HOTPLUG_DIR}
# ash "." fn does not start with current dir, use absolute path to fix
. ${HOTPLUG_DIR}/hotplug.functions
# DEBUG=yes export DEBUG

[ "$DEBUG" != "" ] && mesg "arguments ($*) env (`env`)"
set -x

if [ "$INTERFACE" = "" ]; then
    mesg Bad NET invocation: \$INTERFACE is not set
    exit 1
fi

# crude recursion prevention for when "ifconfig up" triggers another net.agent
# This should not be needed, but it makes testing new scripts more pleasant.
NAID=${INTERFACE}-${ACTION}
NAL=/var/run/net.agent-${NAID}
if [ -f ${NAL} ]; then
    [ "${DEBUG}" = "yes" ] && mesg net.agent-${NAID} already running
    exit 0
fi
echo $$ > ${NAL}
                                                                                
case ${INTERFACE} in
usbd*)
    . ${HOTPLUG_DIR}/usbdnet.conf
    . ${HOTPLUG_DIR}/usbd.func
    ;;
eth*)
    . ${HOTPLUG_DIR}/net.conf
    . ${HOTPLUG_DIR}/net.func
    ;;
esac

case $ACTION in
register)
    # Don't do anything if the network is stopped
    #if [ ! -f /var/lock/subsys/network ]; then
    #	rm -f ${NAL}
    #	exit 0
    #fi

    case $INTERFACE in
	# interfaces that are registered after being "up" (?)
	ppp*|ippp*|isdn*|plip*|lo*|irda*|tunl*)
	    debug_mesg assuming $INTERFACE is already up
	    rm -f ${NAL}
	    exit 0
	    ;;

	# interfaces that are registered then brought up
	usbd0)
	    # set up IP
	    #usbd_net_if_up
	    if [ "$NETMASK" = "" ]; then
		NETMASK=255.255.255.0
	    fi
	    ifconfig usbd0 $IP netmask $NETMASK
	    usbd_net_if_up
	    if [ -f /var/lock/samba/smbd.pid ] ; then
		pid=`pidof nmbd`
		if [ "$pid" = "" ] ; then
#		    echo "Error, restart." >> /var/samba.log
		    /etc/rc.d/init.d/samba stop
		    /etc/rc.d/init.d/samba start
		else
#		    echo "Already running." >> /var/samba.log
		fi
	    else
		/etc/rc.d/init.d/samba start
#		echo Start samba. >> /var/samba.log
	    fi
	    rm -f ${NAL}
	    exit 0
	    ;;

	# interfaces that are registered then brought up
        eth0)
	    # set up IP
	    #ifconfig eth0 $IP netmask $NETMASK
            mesg registering and configuring eth0
	    net_if_up
	    rm -f ${NAL}
            exit 0
            ;;
	*)
	    # NOTE:  network configuration relies on administered state,
	    # we can't do much here without distro-specific knowledge
	    # such as whether/how to invoke DHCP, set up bridging, etc.

	    # RedHat and similar
	    export IN_HOTPLUG=1
	    if [ -x /sbin/ifup ]; then
		debug_mesg invoke ifup $INTERFACE
		exec /sbin/ifup $INTERFACE
	    else
		mesg "how do I bring interfaces up on this distro?"
	    fi
	    ;;
    esac
    mesg $1 $ACTION event not handled
    ;;

unregister)
    case $INTERFACE in
	usbd0)
	    if [ "$DEBUG" != "" ]; then
		mesg ifconfig $INTERFACE down
	    fi
	    usbd_net_if_down
#	    echo Stop samba. >> /var/samba.log
	    /etc/rc.d/init.d/samba stop
	    rm -f ${NAL}
	    exit 0
	    ;;
	eth0)
	    if [ "$DEBUG" != "" ]; then
		mesg ifconfig $INTERFACE down
	    fi
            mesg unregistering eth0
	    net_if_down
	    rm -f ${NAL}
	    exit 0
	    ;;
	*)
	    debug_mesg NET $ACTION event not supported
	    rm -f ${NAL}
	    exit 1 ;;
    esac
    ;;

resume)
    mesg resuming eth0
    rmmod usb-monitor
    insmod usb-monitor
    exit 0
    ;;

*)
    debug_mesg NET $ACTION event not supported
    rm -f ${NAL}
    exit 1 ;;

esac
rm -f ${NAL}