1 files changed, 157 insertions, 0 deletions
diff --git a/main/busybox/default.script b/main/busybox/default.script
new file mode 100644
index 0000000000..8c786f8740
--- /dev/null
+++ b/main/busybox/default.script
@@ -0,0 +1,157 @@
+#!/bin/sh
+
+# script for udhcpc
+# Copyright (c) 2008 Natanael Copa <natanael.copa@gmail.com>
+
+UDHCPC="/etc/udhcpc"
+UDHCPC_CONF="$UDHCPC/udhcpc.conf"
+
+RESOLV_CONF="/etc/resolv.conf"
+[ -f $UDHCPC_CONF ] && . $UDHCPC_CONF
+
+export broadcast
+export dns
+export domain
+export interface
+export ip
+export mask
+export metric
+export router
+export subnet
+
+export PATH=/usr/bin:/bin:/usr/sbin:/sbin
+
+run_scripts() {
+	local dir=$1
+	if [ -d $dir ]; then
+		for i in $dir/*; do
+			[ -f $i ] && $i
+		done
+	fi
+}
+
+deconfig() {
+	ip -4 addr flush dev $interface
+}
+
+is_wifi() {
+	test -e /sys/class/net/$interface/phy80211
+}
+
+if_index() {
+	if [ -e  /sys/class/net/$interface/ifindex ]; then
+		cat /sys/class/net/$interface/ifindex
+	else
+		ip -4 link show dev $interface | head -n1 | cut -d: -f1
+	fi
+}
+
+calc_metric() {
+	local base=
+	if is_wifi; then
+		base=300
+	else
+		base=200
+	fi
+	echo $(( $base + $(if_index) ))
+}
+
+routes() {
+	[ -z "$router" ] && return
+	for i in $NO_GATEWAY; do
+		[ "$i" = "$interface" ] && return
+	done
+	local gw= num=
+	while ip -4 route del default via dev $interface 2>/dev/null; do
+		:
+	done
+	num=0
+	for gw in $router; do
+		if [ "$subnet" = "255.255.255.255" ]; then
+		# special case for /32 subnets:
+		# /32 instructs kernel to always use routing for all outgoing packets
+		# (they can never be sent to local subnet - there is no local subnet for /32).
+		# Used in datacenters, avoids the need for private ip-addresses between two hops.
+			ip -4 route add $gw dev $interface
+		fi
+		ip -4 route add 0.0.0.0/0 via $gw dev $interface \
+			metric $(( $num + ${IF_METRIC:-$(calc_metric)} ))
+		num=$(( $num + 1 ))
+	done
+}
+
+resolvconf() {
+	local i
+	[ -n "$IF_PEER_DNS" ] && [ "$IF_PEER_DNS" != "yes" ] && return
+	if [ "$RESOLV_CONF" = "no" ] || [ "$RESOLV_CONF" = "NO" ] \
+			|| [ -z "$RESOLV_CONF" ]; then
+		return
+	fi
+	for i in $NO_DNS; do
+		[ "$i" = "$interface" ] && return
+	done
+	echo -n > "$RESOLV_CONF.$$"
+	if [ -n "$search" ]; then
+		echo "search $search" >> "$RESOLV_CONF.$$"
+	elif [ -n "$domain" ]; then
+		echo "search $domain" >> "$RESOLV_CONF.$$"
+	fi
+	for i in $dns; do
+		echo "nameserver $i" >> "$RESOLV_CONF.$$"
+	done
+	chmod a+r "$RESOLV_CONF.$$"
+	mv "$RESOLV_CONF.$$" "$RESOLV_CONF"
+}
+
+bound() {
+	ip -4 addr add $ip/$mask ${broadcast:+broadcast $broadcast} dev $interface
+	ip -4 link set dev $interface up
+	routes
+	resolvconf
+}
+
+renew() {
+	if ! ip -4 addr show dev $interface | grep $ip/$mask; then
+		ip -4 addr flush dev $interface
+		ip -4 addr add $ip/$mask ${broadcast:+broadcast $broadcast} dev $interface
+	fi
+
+	local i
+	for i in $router; do
+		if ! ip -4 route show | grep ^default | grep $i; then
+			routes
+			break
+		fi
+	done
+
+	if ! grep "^search $domain"; then
+		resolvconf
+		return
+	fi
+	for i in $dns; do
+		if ! grep "^nameserver $i"; then
+			resolvconf
+			return
+		fi
+	done
+}
+
+case "$1" in
+	deconfig|renew|bound)
+		run_scripts $UDHCPC/pre-$1
+		$1
+		run_scripts $UDHCPC/post-$1
+		;;
+	leasefail)
+		echo "udhcpc failed to get a DHCP lease" >&2
+		;;
+	nak)
+		echo "udhcpc received DHCP NAK" >&2
+		;;
+	*)
+		echo "Error: this script should be called from udhcpc" >&2
+		exit 1
+		;;
+esac
+exit 0
+