diff options
Diffstat (limited to 'package/base-files-network/files/lib/network/config.sh')
| -rwxr-xr-x | package/base-files-network/files/lib/network/config.sh | 444 |
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 + } +} |