#!/bin/sh

#set -e

# initramfs-tools header

PREREQ=""

prereqs()
{
	echo "${PREREQ}"
}

case "${1}" in
	prereqs)
		prereqs
		exit 0
		;;
esac

# live-initramfs header

. /scripts/live-functions

log_begin_msg "Preconfiguring networking..."

# live-initramfs script

IFFILE="/root/etc/network/interfaces"

if [ "${STATICIP}" = "frommedia" -a -e  "$IFFILE" ] ; then
    # will use existent /etc/network/interfaces
    log_end_msg
    exit 0
fi

cat > "$IFFILE" <<EOF
auto lo
iface lo inet loopback

EOF

udevtrigger
udevsettle

if [ -z "${NETBOOT}" -a -n "${STATICIP}" -a "${STATICIP}" != "frommedia" ]; then
    parsed=$(echo "${STATICIP}" | sed -e 's/:/ /g')
    for ifline in ${parsed}; do
        ifname="$(echo ${ifline} | cut -f1 -d ',')"
        ifaddress="$(echo ${ifline} | cut -f2 -d ',')"
        ifnetmask="$(echo ${ifline} | cut -f3 -d ',')"
        ifgateway="$(echo ${ifline} | cut -f4 -d ',')"
        cat >> "$IFFILE" <<EOF
auto ${ifname}
iface ${ifname} inet static
    address ${ifaddress}
    netmask ${ifnetmask}
    gateway ${ifgateway}

EOF
    done
else
    if [ -z "${NETBOOT}" ]; then
        # default, dhcp assigned
        method="dhcp"
    else
        # make sure that the preconfigured interface would not get reassigned by dhcp
        # on startup by ifup script - otherwise our root fs might be disconnected!
        method="manual"
    fi
    # iterate the physical interfaces and add them to the interfaces list
    for interface in /sys/class/net/eth* /sys/class/net/ath* /sys/class/net/wlan*; do
        [ -e $interface ] || continue
        i="$(basename $interface)"
        cat >> "$IFFILE" <<EOF
auto $i
iface $i inet $method

EOF
    done
    if [ ! -f /root/etc/resolv.conf -a -f /netboot.config ] ; then
        # create a resolv.conf if it is not present
        cp /netboot.config /root/var/log/netboot.config
        rc_search=$(cat netboot.config | awk '/domain/{print $3}')
        rc_server0=$(cat netboot.config | awk '/dns0/{print $5}')
        rc_server1=$(cat netboot.config | awk '/dns0/{print $8}')
        rc_server0="nameserver ${rc_server0}"
        if [ "${rc_server1}" = "0.0.0.0" ]; then
            rc_server1=""
        else
            rc_server1="nameserver ${rc_server1}"
        fi
        cat > /root/etc/resolv.conf <<EOF
# /etc/resolv.conf
# Autogenerated by live-initramfs
search ${rc_search}
domain ${rc_search}
${rc_server0}
${rc_server1}
EOF
        cat /root/etc/resolv.conf >> /root/var/log/netboot.config
    fi
fi

#for i in eth0 eth1 eth2 ath0 wlan0; do
#    grep -q "iface $i" $IFFILE && continue
#    cat >> "$IFFILE" <<EOF
#auto $i
#iface $i inet dhcp
#
#EOF
#done

log_end_msg