#!/bin/bash

type emergency_shell >/dev/null 2>&1 || . /lib/dracut-lib.sh

. /run/openslx/network.conf

_logfile="/run/openslx/network.log"

# for the boot interface?
if [ ! -e "/sys/class/net/${SLX_PXE_NETIF}/device" ]; then
	exit 1
fi

wait_for_iface() {
	local _iface="$1"
	local _timeout="${2:-50}"
	while [ "$_timeout" -ne 0 ]; do
		[ "$(cat /sys/class/net/${_iface}/operstate)" = "up" ] && break
		(( _timeout -- ))
		usleep 100000
	done
	[ "$_timeout" -ne 0 ]
}

# For debugging...
{
set -x

ip link set dev "$SLX_PXE_NETIF" up
if ! wait_for_iface "$SLX_PXE_NETIF" 100; then
	warn "'$SLX_PXE_NETIF' still not up after 10sec ..."
	# TODO handle case where we waited for 10sec and it is still not up
fi

if [ -n "$SLX_BRIDGE" ]; then
	for try in 1 2 3 fail; do
		(
		set -e
		brctl addbr "$SLX_BRIDGE"
		brctl stp "$SLX_BRIDGE" 0
		brctl setfd "$SLX_BRIDGE" 0.000000000001
		ip link set addr "$SLX_PXE_MAC" "$SLX_BRIDGE"
		brctl addif "$SLX_BRIDGE" "$SLX_PXE_NETIF"
		ip link set dev "$SLX_BRIDGE" up
		wait_for_iface "$SLX_BRIDGE"
		)
		# success?
		[ "$?" -eq 0 ] && break

		# nope, handle
		if [ "$try" = "fail" ]; then
			emergency_shell "Failed to setup main network bridge, giving up!"
		fi
		warn "Failed to setup main network bridge on try $try. Retrying ..."
		# delete bridge, inc try and sleep 100ms before trying again
		[ -e "/sys/class/net/${SLX_BRIDGE}" ] && brctl delbr "$SLX_BRIDGE"
		try=$(( try + 1 ))
		usleep 100000
	done
fi
# add the IP address on the bridge/boot if
ip addr add \
	"${SLX_PXE_CLIENT_IP}/$(ipcalc -s -p "$SLX_PXE_CLIENT_IP" "$SLX_PXE_NETMASK" | sed "s/.*=//")" \
	broadcast "$(ipcalc -s -b "$SLX_PXE_CLIENT_IP" "$SLX_PXE_NETMASK" | sed "s/.*=//")" \
	dev "${SLX_BRIDGE:-${SLX_PXE_NETIF}}"

if [ "$USE_DHCP_UUID" = "yes" ] && [ -s "/run/system-uuid" ]; then
	UUID="$(cat /run/system-uuid)"
fi

# udhcpc
for i in 1 1 1 fail; do
	[ "$i" = "fail" ] && emergency_shell "DHCP failed 3 times... cannot continue."
	udhcpc -t 4 -T 3 -f -n -q \
		-i "${SLX_BRIDGE:-${SLX_PXE_NETIF}}" \
		"${SLX_PXE_CLIENT_IP:+-r $SLX_PXE_CLIENT_IP}" \
		"${UUID:+-x 0x3d:$UUID}" \
		-O ntpsrv -O domain -O wpad -O search -O nisdomain \
		-s "/usr/local/bin/udhcpc-trigger"
	# success?
	[ "$?" -eq 0 ] && break
	# nope, keep trying...
	warn "DHCP failed, retrying in 1sec..."
	sleep $i
done

set +x
} &>> "${_logfile}.$$"