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# -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*-
# ex: ts=8 sw=4 sts=4 et filetype=sh
#
# We don't need to check for ip= errors here, that is handled by the
# cmdline parser script
#
# without $2 means this is for real netroot case
# or it is for manually bring up network ie. for kdump scp vmcore
PATH=/usr/sbin:/usr/bin:/sbin:/bin

type getarg >/dev/null 2>&1 || . /lib/dracut-lib.sh
type ip_to_var >/dev/null 2>&1 || . /lib/net-lib.sh

# Huh? No $1?
[ -z "$1" ] && exit 1

# $netif reads easier than $1
netif=$1

# loopback is always handled the same way
if [ "$netif" = "lo" ] ; then
    ip link set lo up
    ip addr add 127.0.0.1/8 dev lo
    exit 0
fi

# Run dhclient
do_dhcp() {
    # dhclient-script will mark the netif up and generate the online
    # event for nfsroot
    # XXX add -V vendor class and option parsing per kernel

    local _COUNT=0
    local _timeout=$(getargs rd.net.timeout.dhcp=)
    local _DHCPRETRY=$(getargs rd.net.dhcp.retry=)
    _DHCPRETRY=${_DHCPRETRY:-1}

    [ -e /tmp/dhclient.$netif.pid ] && return 0

    if ! iface_has_carrier $netif; then
        warn "No carrier detected on interface $netif"
        return 1
    fi

    [ -n "$macaddr" ] && ip link set address $macaddr dev $netif
    [ -n "$mtu" ] && ip link set mtu $mtu dev $netif
    ip -4 addr flush dev $netif

    while [ $_COUNT -lt $_DHCPRETRY ]; do
        info "Starting dhcp for interface $netif"
        dhclient "$@" \
                 ${_timeout:+-timeout $_timeout} \
                 -q \
                 -cf /etc/dhclient.conf \
                 -pf /tmp/dhclient.$netif.pid \
                 -lf /tmp/dhclient.$netif.lease \
                 $netif \
            && return 0
        _COUNT=$(($_COUNT+1))
        [ $_COUNT -lt $_DHCPRETRY ] && sleep 1
    done
    warn "dhcp for interface $netif failed"
    return 1
}

load_ipv6() {
    [ -d /proc/sys/net/ipv6 ] && return
    modprobe ipv6
    i=0
    while [ ! -d /proc/sys/net/ipv6 ]; do
        i=$(($i+1))
        [ $i -gt 10 ] && break
        sleep 0.1
    done
}

do_ipv6auto() {
    local ret
    load_ipv6
    echo 0 > /proc/sys/net/ipv6/conf/$netif/forwarding
    echo 1 > /proc/sys/net/ipv6/conf/$netif/accept_ra
    echo 1 > /proc/sys/net/ipv6/conf/$netif/accept_redirects
    linkup $netif
    [ -n "$macaddr" ] && ip link set address $macaddr dev $netif
    [ -n "$mtu" ] && ip link set mtu $mtu dev $netif
    wait_for_ipv6_auto $netif
    ret=$?

    [ -n "$hostname" ] && echo "echo $hostname > /proc/sys/kernel/hostname" > /tmp/net.$netif.hostname

    return $ret
}

# Handle static ip configuration
do_static() {
    strstr $ip '*:*:*' && load_ipv6

    if [ -z "$dev" ] && ! iface_has_carrier "$netif"; then
        warn "No carrier detected on interface $netif"
        return 1
    elif ! linkup "$netif"; then
        warn "Could not bring interface $netif up!"
        return 1
    fi

    ip route get "$ip" | {
        read a rest
        if [ "$a" = "local" ]; then
            warn "Not assigning $ip to interface $netif, cause it is already assigned!"
            return 1
        fi
        return 0
    } || return 1

    [ -n "$macaddr" ] && ip link set address $macaddr dev $netif
    [ -n "$mtu" ] && ip link set mtu $mtu dev $netif
    if strstr $ip '*:*:*'; then
        # note no ip addr flush for ipv6
        ip addr add $ip/$mask ${srv:+peer $srv} dev $netif
        wait_for_ipv6_dad $netif
    else
        if [ -z "$srv" ]; then
            if ! arping -f -q -D -c 2 -I $netif $ip; then
                warn "Duplicate address detected for $ip for interface $netif."
                return 1
            fi
        fi
        ip -4 addr flush dev $netif
        ip addr add $ip/$mask ${srv:+peer $srv} brd + dev $netif
    fi

    [ -n "$gw" ] && echo ip route replace default via $gw dev $netif > /tmp/net.$netif.gw
    [ -n "$hostname" ] && echo "echo $hostname > /proc/sys/kernel/hostname" > /tmp/net.$netif.hostname

    return 0
}

get_vid() {
    case "$1" in
    vlan*)