#!/bin/sh # Copyright (C) 2006 OpenWrt.org # DEBUG="echo" 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" "${1##*\.}" return 0 } return 1 } # sort the device list, drop duplicates sort_list() { local arg="$*" ( 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 vifmac="$3" # if we're called for the bridge interface itself, don't bother trying # to create any interfaces here. The scripts have already done that, otherwise # the bridge interface wouldn't exist. [ "br-$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 "$iface" [ "$proto" = none ] || ifconfig "$iface" 0.0.0.0 # Change interface MAC address if requested [ -n "$vifmac" ] && { ifconfig "$iface" down ifconfig "$iface" hw ether "$vifmac" up } } # Setup VLAN interfaces add_vlan "$iface" && return 1 ifconfig "$iface" 2>/dev/null >/dev/null || return 0 # Setup bridging local iftype config_get iftype "$config" type case "$iftype" in bridge) [ -x /usr/sbin/brctl ] && { ifconfig "br-$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_set_state network "$config" device "$newdevs" $DEBUG ifconfig "$iface" 0.0.0.0 $DEBUG brctl addif "br-$config" "$iface" # Bridge existed already. No further processing necesary } || { local stp config_get_bool stp "$config" stp 0 $DEBUG brctl addbr "br-$config" $DEBUG brctl setfd "br-$config" 0 $DEBUG ifconfig "br-$config" up $DEBUG ifconfig "$iface" 0.0.0.0 $DEBUG brctl addif "br-$config" "$iface" $DEBUG brctl stp "br-$config" $stp # Creating the bridge here will have triggered a hotplug event, which will # result in another setup_interface() call, so we simply stop processing # the current event at this point. } ifconfig "$iface" 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 "$1" device uci_set_state network "$config" ifname "$ifname" uci_set_state network "$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 "$ip6addr" ] && return 1 local gateway ip6gw dns bcast config_get gateway "$config" gateway config_get ip6gw "$config" ip6gw config_get dns "$config" dns config_get bcast "$config" broadcast [ -z "$ipaddr" ] || $DEBUG ifconfig "$iface" "$ipaddr" netmask "$netmask" broadcast "${bcast:-+}" [ -z "$ip6addr" ] || $DEBUG ifconfig "$iface" add "$ip6addr" [ -z "$gateway" ] || $DEBUG route add default gw "$gateway" dev "$iface" [ -z "$ip6gw" ] || $DEBUG route -A inet6 add default gw "$ip6gw" dev "$iface" [ -z "$dns" ] || { for ns in $dns; do grep "$ns" /tmp/resolv.conf.auto 2>/dev/null >/dev/null || { echo "nameserver $ns" >> /tmp/resolv.conf.auto } done } config_get type "$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 # 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 "$list" iface="$iface:$ctr" set_interface_ifname "$config" "$iface" local proto config_get proto "$config" proto "static" case "${proto}" in static) setup_interface_static "$iface" "$config" ;; *) echo "Unsupported type '$proto' for alias config '$config'" return 1 ;; esac } setup_interface() { local iface_main="$1" local config="$2" local proto="$3" local vifmac="$4" local ip6addr_main= [ -n "$config" ] || { config=$(find_config "$iface_main") [ "$?" = 0 ] || return 1 } prepare_interface "$iface_main" "$config" "$vifmac" || return 0 [ "$iface_main" = "br-$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 "$iface_main" up sleep 1 } # Interface settings grep "$iface_main:" /proc/net/dev > /dev/null && { local mtu macaddr config_get mtu "$config" mtu config_get macaddr "$config" macaddr [ -n "$macaddr" ] && $DEBUG ifconfig "$iface_main" down $DEBUG ifconfig "$iface_main" ${macaddr:+hw ether "$macaddr"} ${mtu:+mtu $mtu} up } set_interface_ifname "$config" "$iface_main" [ -n "$proto" ] || config_get proto "$config" proto case "$proto" in static) config_get ip6addr_main "$config" ip6addr setup_interface_static "$iface_main" "$config" ;; dhcp) local lockfile="/var/lock/dhcp-$iface_main" lock "$lockfile" # prevent udhcpc from starting more than once local pidfile="/var/run/dhcp-${iface_main}.pid" local pid="$(cat "$pidfile" 2>/dev/null)" if [ -d "/proc/$pid" ] && grep -qs udhcpc "/proc/${pid}/cmdline"; then lock -u "$lockfile" else local ipaddr netmask hostname proto1 clientid config_get ipaddr "$config" ipaddr config_get netmask "$config" netmask config_get hostname "$config" hostname config_get proto1 "$config" proto config_get clientid "$config" clientid [ -z "$ipaddr" ] || \ $DEBUG ifconfig "$iface_main" "$ipaddr" ${netmask:+netmask "$netmask"} # don't stay running in background if dhcp is not the main proto on the interface (e.g. when using pptp) local dhcpopts [ ."$proto1" != ."$proto" ] && dhcpopts="-n -q" $DEBUG eval udhcpc -t 0 -i "$iface_main" ${ipaddr:+-r $ipaddr} ${hostname:+-H $hostname} ${clientid:+-c $clientid} -b -p "$pidfile" ${dhcpopts:- -O rootpath -R &} lock -u "$lockfile" fi ;; none) setup_interface_none "$iface_main" "$config" ;; *) if ( eval "type setup_interface_$proto" ) >/dev/null 2>/dev/null; then eval "setup_interface_$proto '$iface_main' '$config' '$proto'" else echo "Interface type $proto not supported." return 1 fi ;; esac [ "$proto" = none ] || { for ifn in `ifconfig | grep "^$iface_main:" | awk '{print $1}'`; do ifconfig "$ifn" down done } local aliases config_set "$config" aliases "" config_set "$config" alias_count 0 config_foreach setup_interface_alias alias "$config" "$iface_main" config_get aliases "$config" aliases [ -z "$aliases" ] || uci_set_state network "$config" aliases "$aliases" # put the ip6addr back to the beginning to become the main ip again [ -z "$ip6addr_main" ] || { $DEBUG ifconfig "$iface_main" del "$ip6addr_main" $DEBUG ifconfig "$iface_main" add "$ip6addr_main" } } stop_interface_dhcp() { local config="$1" local iface config_get iface "$config" iface local lock="/var/lock/dhcp-${iface}" [ -f "$lock" ] && lock -u "$lock" local pidfile="/var/run/dhcp-${iface}.pid" local pid="$(cat "$pidfile" 2>/dev/null)" [ -d "/proc/$pid" ] && { grep -qs udhcpc "/proc/$pid/cmdline" && kill -TERM $pid && \ while grep -qs udhcpc "/proc/$pid/cmdline"; do sleep 1; done rm -f "$pidfile" } uci -P /var/state revert "network.$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 done } }