#!/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" } 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 -qsF "nameserver $dns" /tmp/resolv.conf.auto || { add="${add:+$add }$dns" echo "nameserver $dns" >> /tmp/resolv.conf.auto } done [ -n "$cfg" ] && { uci_set_state network "$cfg" dns "$add" uci_set_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 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 "$iftype" in bridge) local macaddr config_get macaddr "$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_set_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" "$iface" # Bridge existed already. No further processing necesary } || { local stp config_get_bool stp "$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 $DEBUG do_sysctl "net.ipv6.conf.$iface.disable_ipv6" 1 $DEBUG brctl addif "br-$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" ${macaddr:+hw ether "${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 "$1" device uci_set_state network "$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 "$ip6addr" ] && return 1 local gateway ip6gw dns bcast metric config_get gateway "$config" gateway config_get ip6gw "$config" ip6gw config_get dns "$config" dns config_get bcast "$config" broadcast config_get metric "$config" metric [ -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 "$iface" up sleep 1 } # Interface settings grep "$iface:" /proc/net/dev > /dev/null && { local mtu macaddr txqueuelen config_get mtu "$config" mtu config_get macaddr "$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 $txqueuelen} up } set_interface_ifname "$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 } }