base-files: move network related scripts to a separate package to make the transition to netifd easier

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@28495 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 444 insertions, 0 deletions

diff --git a/package/base-files-network/files/lib/network/config.sh b/package/base-files-network/files/lib/network/config.sh
new file mode 100755
index 000000000..29d021af9
--- /dev/null
+++ b/package/base-files-network/files/lib/network/config.sh
@@ -0,0 +1,444 @@
+#!/bin/sh
+# Copyright (C) 2006 OpenWrt.org
+
+# DEBUG="echo"
+
+do_sysctl() {
+	[ -n "$2" ] && \
+		sysctl -n -e -w "$1=$2" >/dev/null || \
+		sysctl -n -e "$1"
+}
+
+map_sysctls() {
+	local cfg="$1"
+	local ifn="$2"
+
+	local fam
+	for fam in ipv4 ipv6; do
+		if [ -d /proc/sys/net/$fam ]; then
+			local key
+			for key in /proc/sys/net/$fam/*/$ifn/*; do
+				local val
+				config_get val "$cfg" "${fam}_${key##*/}"
+				[ -n "$val" ] && echo -n "$val" > "$key"
+			done
+		fi
+	done
+}
+
+find_config() {
+	local iftype device iface ifaces ifn
+	for ifn in $interfaces; do
+		config_get iftype "$ifn" type
+		config_get iface "$ifn" ifname
+		case "$iftype" in
+			bridge) config_get ifaces "$ifn" ifnames;;
+		esac
+		config_get device "$ifn" device
+		for ifc in $device $iface $ifaces; do
+			[ ."$ifc" = ."$1" ] && {
+				echo "$ifn"
+				return 0
+			}
+		done
+	done
+
+	return 1;
+}
+
+scan_interfaces() {
+	local cfgfile="${1:-network}"
+	interfaces=
+	config_cb() {
+		case "$1" in
+			interface)
+				config_set "$2" auto 1
+			;;
+		esac
+		local iftype ifname device proto
+		config_get iftype "$CONFIG_SECTION" TYPE
+		case "$iftype" in
+			interface)
+				append interfaces "$CONFIG_SECTION"
+				config_get proto "$CONFIG_SECTION" proto
+				config_get iftype "$CONFIG_SECTION" type
+				config_get ifname "$CONFIG_SECTION" ifname
+				config_get device "$CONFIG_SECTION" device "$ifname"
+				config_set "$CONFIG_SECTION" device "$device"
+				case "$iftype" in
+					bridge)
+						config_set "$CONFIG_SECTION" ifnames "$device"
+						config_set "$CONFIG_SECTION" ifname br-"$CONFIG_SECTION"
+					;;
+				esac
+				( type "scan_$proto" ) >/dev/null 2>/dev/null && eval "scan_$proto '$CONFIG_SECTION'"
+			;;
+		esac
+	}
+	config_load "${cfgfile}"
+}
+
+add_vlan() {
+	local vif="${1%\.*}"
+
+	[ "$1" = "$vif" ] || ifconfig "$1" >/dev/null 2>/dev/null || {
+		ifconfig "$vif" up 2>/dev/null >/dev/null || add_vlan "$vif"
+		$DEBUG vconfig add "$vif" "${1##*\.}"
+		return 0
+	}
+	return 1
+}
+
+# add dns entries if they are not in resolv.conf yet
+add_dns() {
+	local cfg="$1"; shift
+
+	remove_dns "$cfg"
+
+	# We may be called by pppd's ip-up which has a nonstandard umask set.
+	# Create an empty file here and force its permission to 0644, otherwise
+	# dnsmasq will not be able to re-read the resolv.conf.auto .
+	[ ! -f /tmp/resolv.conf.auto ] && {
+		touch /tmp/resolv.conf.auto
+		chmod 0644 /tmp/resolv.conf.auto
+	}
+
+	local dns
+	local add
+	for dns in "$@"; do
+		grep -qsE "^nameserver ${dns//./\\.}$" /tmp/resolv.conf.auto || {
+			add="${add:+$add }$dns"
+			echo "nameserver $dns" >> /tmp/resolv.conf.auto
+		}
+	done
+
+	[ -n "$cfg" ] && {
+		uci_toggle_state network "$cfg" dns "$add"
+		uci_toggle_state network "$cfg" resolv_dns "$add"
+	}
+}
+
+# remove dns entries of the given iface
+remove_dns() {
+	local cfg="$1"
+
+	[ -n "$cfg" ] && {
+		[ -f /tmp/resolv.conf.auto ] && {
+			local dns=$(uci_get_state network "$cfg" resolv_dns)
+			for dns in $dns; do
+				sed -i -e "/^nameserver ${dns//./\\.}$/d" /tmp/resolv.conf.auto
+			done
+		}
+
+		uci_revert_state network "$cfg" dns
+		uci_revert_state network "$cfg" resolv_dns
+	}
+}
+
+# sort the device list, drop duplicates
+sort_list() {
+	local arg="$*"
+	(
+		for item in $arg; do
+			echo "$item"
+		done
+	) | sort -u
+}
+
+# Create the interface, if necessary.
+# Return status 0 indicates that the setup_interface() call should continue
+# Return status 1 means that everything is set up already.
+
+prepare_interface() {
+	local iface="$1"
+	local config="$2"
+	local macaddr="$3"
+
+	# if we're called for the bridge interface itself, don't bother trying
+	# to create any interfaces here. The scripts have already done that, otherwise
+	# the bridge interface wouldn't exist.
+	[ "br-$config" = "$iface" -o -e "$iface" ] && return 0;
+
+	ifconfig "$iface" 2>/dev/null >/dev/null && {
+		local proto
+		config_get proto "$config" proto
+
+		# make sure the interface is removed from any existing bridge and deconfigured,
+		# (deconfigured only if the interface is not set to proto=none)
+		unbridge "$iface"
+
+		local mtu macaddr txqueuelen
+		config_get mtu "$config" mtu
+		[ -n "$macaddr" ] || config_get macaddr "$config" macaddr
+		config_get txqueuelen "$config" txqueuelen
+		[ -n "$macaddr" ] && $DEBUG ifconfig "$iface" down
+		$DEBUG ifconfig "$iface" ${macaddr:+hw ether "$macaddr"} ${mtu:+mtu $mtu} ${txqueuelen:+txqueuelen $txqueuelen} up
+
+		[ "$proto" = none ] || ifconfig "$iface" 0.0.0.0
+
+		# Apply sysctl settings
+		map_sysctls "$config" "$iface"
+	}
+
+	# Setup VLAN interfaces
+	add_vlan "$iface" && return 1
+	ifconfig "$iface" 2>/dev/null >/dev/null || return 0
+
+	# Setup bridging
+	local iftype
+	config_get iftype "$config" type
+	case "$iftype" in
+		bridge)
+			local macaddr
+			config_get macaddr "$config" macaddr
+			[ -x /usr/sbin/brctl ] && {
+				ifconfig "br-$config" 2>/dev/null >/dev/null && {
+					local newdevs devices
+					config_get devices "$config" device
+					for dev in $(sort_list "$devices" "$iface"); do
+						append newdevs "$dev"
+					done
+					uci_toggle_state network "$config" device "$newdevs"
+					$DEBUG ifconfig "$iface" 0.0.0.0
+					$DEBUG do_sysctl "net.ipv6.conf.$iface.disable_ipv6" 1
+					$DEBUG brctl addif "br-$config" "$iface"
+					# Bridge existed already. No further processing necesary
+				} || {
+					local stp igmp_snooping
+					config_get_bool stp "$config" stp 0
+					config_get_bool igmp_snooping "$config" igmp_snooping 1
+					$DEBUG brctl addbr "br-$config"
+					$DEBUG brctl setfd "br-$config" 0
+					$DEBUG ifconfig "$iface" 0.0.0.0
+					$DEBUG do_sysctl "net.ipv6.conf.$iface.disable_ipv6" 1
+					$DEBUG brctl addif "br-$config" "$iface"
+					$DEBUG brctl stp "br-$config" $stp
+					[ -z "$macaddr" ] && macaddr="$(cat /sys/class/net/$iface/address)"
+					echo $igmp_snooping > /sys/devices/virtual/net/br-$config/bridge/multicast_snooping 2>/dev/null
+					$DEBUG ifconfig "br-$config" hw ether $macaddr up
+					# Creating the bridge here will have triggered a hotplug event, which will
+					# result in another setup_interface() call, so we simply stop processing
+					# the current event at this point.
+				}
+				ifconfig "$iface" ${macaddr:+hw ether "${macaddr}"} up 2>/dev/null >/dev/null
+				return 1
+			}
+		;;
+	esac
+	return 0
+}
+
+set_interface_ifname() {
+	local config="$1"
+	local ifname="$2"
+
+	local device
+	config_get device "$1" device
+	uci_toggle_state network "$config" ifname "$ifname"
+	uci_toggle_state network "$config" device "$device"
+}
+
+setup_interface_none() {
+	env -i ACTION="ifup" INTERFACE="$2" DEVICE="$1" PROTO=none /sbin/hotplug-call "iface" &
+}
+
+setup_interface_static() {
+	local iface="$1"
+	local config="$2"
+
+	local ipaddr netmask ip6addr
+	config_get ipaddr "$config" ipaddr
+	config_get netmask "$config" netmask
+	config_get ip6addr "$config" ip6addr
+	[ -z "$ipaddr" -o -z "$netmask" ] && [ -z "$ip6addr" ] && return 1
+
+	local gateway ip6gw dns bcast metric
+	config_get gateway "$config" gateway
+	config_get ip6gw "$config" ip6gw
+	config_get dns "$config" dns
+	config_get bcast "$config" broadcast
+	config_get metric "$config" metric
+
+	case "$ip6addr" in
+		*/*) ;;
+		*:*) ip6addr="$ip6addr/64" ;;
+	esac
+
+	[ -z "$ipaddr" ] || $DEBUG ifconfig "$iface" "$ipaddr" netmask "$netmask" broadcast "${bcast:-+}"
+	[ -z "$ip6addr" ] || $DEBUG ifconfig "${iface%:*}" add "$ip6addr"
+	[ -z "$gateway" ] || $DEBUG route add default gw "$gateway" ${metric:+metric $metric} dev "$iface"
+	[ -z "$ip6gw" ] || $DEBUG route -A inet6 add default gw "$ip6gw" ${metric:+metric $metric} dev "${iface%:*}"
+	[ -z "$dns" ] || add_dns "$config" $dns
+
+	config_get type "$config" TYPE
+	[ "$type" = "alias" ] && return 0
+
+	env -i ACTION="ifup" INTERFACE="$config" DEVICE="$iface" PROTO=static /sbin/hotplug-call "iface" &
+}
+
+setup_interface_alias() {
+	local config="$1"
+	local parent="$2"
+	local iface="$3"
+
+	local cfg
+	config_get cfg "$config" interface
+	[ "$parent" == "$cfg" ] || return 0
+
+	# parent device and ifname
+	local p_device p_type
+	config_get p_device "$cfg" device
+	config_get p_type   "$cfg" type
+
+	# select alias ifname
+	local layer use_iface
+	config_get layer "$config" layer 2
+	case "$layer:$p_type" in
+		# layer 3: e.g. pppoe-wan or pptp-vpn
+		3:*)      use_iface="$iface" ;;
+
+		# layer 2 and parent is bridge: e.g. br-wan
+		2:bridge) use_iface="br-$cfg" ;;
+
+		# layer 1: e.g. eth0 or ath0
+		*)        use_iface="$p_device" ;;
+	esac
+
+	# alias counter
+	local ctr
+	config_get ctr "$parent" alias_count 0
+	ctr="$(($ctr + 1))"
+	config_set "$parent" alias_count "$ctr"
+
+	# alias list
+	local list
+	config_get list "$parent" aliases
+	append list "$config"
+	config_set "$parent" aliases "$list"
+
+	use_iface="$use_iface:$ctr"
+	set_interface_ifname "$config" "$use_iface"
+
+	local proto
+	config_get proto "$config" proto "static"
+	case "${proto}" in
+		static)
+			setup_interface_static "$use_iface" "$config"
+		;;
+		*)
+			echo "Unsupported type '$proto' for alias config '$config'"
+			return 1
+		;;
+	esac
+}
+
+setup_interface() {
+	local iface="$1"
+	local config="$2"
+	local proto="$3"
+	local vifmac="$4"
+
+	[ -n "$config" ] || {
+		config=$(find_config "$iface")
+		[ "$?" = 0 ] || return 1
+	}
+
+	prepare_interface "$iface" "$config" "$vifmac" || return 0
+
+	[ "$iface" = "br-$config" ] && {
+		# need to bring up the bridge and wait a second for
+		# it to switch to the 'forwarding' state, otherwise
+		# it will lose its routes...
+		ifconfig "$iface" up
+		sleep 1
+	}
+
+	# Interface settings
+	set_interface_ifname "$config" "$iface"
+
+	[ -n "$proto" ] || config_get proto "$config" proto
+	case "$proto" in
+		static)
+			setup_interface_static "$iface" "$config"
+		;;
+		dhcp)
+			# kill running udhcpc instance
+			local pidfile="/var/run/dhcp-${iface}.pid"
+			service_kill udhcpc "$pidfile"
+
+			local ipaddr netmask hostname proto1 clientid vendorid broadcast reqopts
+			config_get ipaddr "$config" ipaddr
+			config_get netmask "$config" netmask
+			config_get hostname "$config" hostname
+			config_get proto1 "$config" proto
+			config_get clientid "$config" clientid
+			config_get vendorid "$config" vendorid
+			config_get_bool broadcast "$config" broadcast 0
+			config_get reqopts "$config" reqopts
+
+			[ -z "$ipaddr" ] || \
+				$DEBUG ifconfig "$iface" "$ipaddr" ${netmask:+netmask "$netmask"}
+
+			# additional request options
+			local opt dhcpopts
+			for opt in $reqopts; do
+				append dhcpopts "-O $opt"
+			done
+
+			# don't stay running in background if dhcp is not the main proto on the interface (e.g. when using pptp)
+			[ "$proto1" != "$proto" ] && append dhcpopts "-n -q" || append dhcpopts "-O rootpath -R &"
+			[ "$broadcast" = 1 ] && broadcast="-O broadcast" || broadcast=
+
+			$DEBUG eval udhcpc -t 0 -i "$iface" \
+				${ipaddr:+-r $ipaddr} \
+				${hostname:+-H $hostname} \
+				${clientid:+-c $clientid} \
+				${vendorid:+-V $vendorid} \
+				-b -p "$pidfile" $broadcast \
+				${dhcpopts}
+		;;
+		none)
+			setup_interface_none "$iface" "$config"
+		;;
+		*)
+			if ( eval "type setup_interface_$proto" ) >/dev/null 2>/dev/null; then
+				eval "setup_interface_$proto '$iface' '$config' '$proto'"
+			else
+				echo "Interface type $proto not supported."
+				return 1
+			fi
+		;;
+	esac
+}
+
+stop_interface_dhcp() {
+	local config="$1"
+
+	local ifname
+	config_get ifname "$config" ifname
+
+	local lock="/var/lock/dhcp-${ifname}"
+	[ -f "$lock" ] && lock -u "$lock"
+
+	remove_dns "$config"
+
+	local pidfile="/var/run/dhcp-${ifname}.pid"
+	service_kill udhcpc "$pidfile"
+
+	uci -P /var/state revert "network.$config"
+}
+
+unbridge() {
+	local dev="$1"
+	local brdev
+
+	[ -x /usr/sbin/brctl ] || return 0
+	brctl show 2>/dev/null | grep "$dev" >/dev/null && {
+		# interface is still part of a bridge, correct that
+
+		for brdev in $(brctl show | awk '$2 ~ /^[0-9].*\./ { print $1 }'); do
+			brctl delif "$brdev" "$dev" 2>/dev/null >/dev/null
+			do_sysctl "net.ipv6.conf.$dev.disable_ipv6" 0
+		done
+	}
+}