#!/bin/sh

set -e

# reduced dhclient-script for the Debian installer
# changes by Joshua Kwan <joshk@triplehelix.org>,
# Bastian Blank <waldi@debian.org>

# dhclient-script for Linux. Dan Halbert, March, 1997.
# Updated for Linux 2.[12] by Brian J. Murrell, January 1999.
# Modified for Debian.  Matt Zimmerman and Eloy Paris, December 2003
# Adapted the GNU/Linux script to GNU/Hurd, Svante Signell and Samuel Thibault,
# February 2011.

make_resolv_conf() {
    if [ -n "$new_domain_name" ] || [ -n "$new_domain_name_servers" ]; then
        local new_resolv_conf=/etc/resolv.conf.dhclient-new
        rm -f $new_resolv_conf
        if [ -n "$new_domain_name" ]; then
            echo "search $new_domain_name" >>$new_resolv_conf
        fi
        for nameserver in $new_domain_name_servers; do
            echo "nameserver $nameserver" >>$new_resolv_conf
        done
        mv $new_resolv_conf /etc/resolv.conf
    fi
}

set_hostname() {
    local current_hostname=$(hostname)
    if [ -z "$current_hostname" ] || [ "$current_hostname" = "(none)" ]; then
        hostname "$new_host_name"
    fi
}

if [ -n "$new_subnet_mask" ]; then
    new_subnet_arg="-m $new_subnet_mask"
fi

# Execute the operation
case "$reason" in
    MEDIUM|ARPCHECK|ARPSEND)
        # Do nothing
        ;;
    PREINIT)
        settrans -afg /servers/socket/2 /hurd/pfinet -i $interface

        # We need to give the kernel some time to get the interface up.
        sleep 1
        ;;
    BOUND|RENEW|REBIND|REBOOT)

        set_hostname
	pfinet_args="-i $interface"
        
        if [ -n "$old_ip_address" ] && \
             [ "$old_ip_address" != "$new_ip_address" ]; then
            # IP address changed. Bringing down the interface will delete all routes,
            # and clear the ARP cache.
            fsysopts /servers/socket/2 $pfinet_args
        fi

	# TODO: add MTU option to pfinet
	#if [ -n "$new_interface_mtu" ]; then
	#    pfinet_args="$pfinet_args --mtu $new_interface_mtu"
	#    fsysopts /servers/socket/2 $pfinet_args
	#fi

        if [ -z "$old_ip_address" ] || [ "$old_ip_address" != "$new_ip_address" ] || \
            [ "$reason" = "BOUND" ] || [ "$reason" = "REBOOT" ]; then

	    pfinet_args="$pfinet_args -a $new_ip_address $new_subnet_arg"

            for router in $new_routers; do
               pfinet_args="$pfinet_args -g $router"
            done
	    fsysopts /servers/socket/2 $pfinet_args
        fi

        make_resolv_conf

        # Get the domain name into a file suitable for netcfg to read.
        printf "$new_domain_name" > /tmp/domain_name

        if [ -n "$new_ntp_servers" ]; then
            printf "$new_ntp_servers" > /tmp/dhcp-ntp-servers
        fi
        ;;

    EXPIRE|FAIL|RELEASE|STOP)
        if [ -n "$old_ip_address" ]; then
            # Shut down interface, which will delete routes and clear arp cache.
	    fsysopts /servers/socket/2 -i $interface
        fi

        ;;

    TIMEOUT)
	fsysopts /servers/socket/2 -i $interface

        ;;
esac

exit 0