426 lines
11 KiB
Bash
Executable File
426 lines
11 KiB
Bash
Executable File
#!/bin/sh
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# Copyright (C) 2006 OpenWrt.org
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# DEBUG="echo"
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find_config() {
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local iftype device iface ifaces ifn
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for ifn in $interfaces; do
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config_get iftype "$ifn" type
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config_get iface "$ifn" ifname
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case "$iftype" in
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bridge) config_get ifaces "$ifn" ifnames;;
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esac
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config_get device "$ifn" device
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for ifc in $device $iface $ifaces; do
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[ ."$ifc" = ."$1" ] && {
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echo "$ifn"
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return 0
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}
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done
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done
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return 1;
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}
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scan_interfaces() {
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local cfgfile="${1:-network}"
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interfaces=
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config_cb() {
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case "$1" in
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interface)
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config_set "$2" auto 1
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;;
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esac
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local iftype ifname device proto
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config_get iftype "$CONFIG_SECTION" TYPE
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case "$iftype" in
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interface)
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append interfaces "$CONFIG_SECTION"
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config_get proto "$CONFIG_SECTION" proto
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config_get iftype "$CONFIG_SECTION" type
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config_get ifname "$CONFIG_SECTION" ifname
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config_get device "$CONFIG_SECTION" device "$ifname"
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config_set "$CONFIG_SECTION" device "$device"
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case "$iftype" in
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bridge)
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config_set "$CONFIG_SECTION" ifnames "$device"
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config_set "$CONFIG_SECTION" ifname br-"$CONFIG_SECTION"
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;;
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esac
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( type "scan_$proto" ) >/dev/null 2>/dev/null && eval "scan_$proto '$CONFIG_SECTION'"
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;;
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esac
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}
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config_load "${cfgfile}"
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}
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add_vlan() {
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local vif="${1%\.*}"
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[ "$1" = "$vif" ] || ifconfig "$1" >/dev/null 2>/dev/null || {
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ifconfig "$vif" up 2>/dev/null >/dev/null || add_vlan "$vif"
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$DEBUG vconfig add "$vif" "${1##*\.}"
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return 0
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}
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return 1
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}
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# add dns entries if they are not in resolv.conf yet
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add_dns() {
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local cfg="$1"; shift
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remove_dns "$cfg"
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# We may be called by pppd's ip-up which has a nonstandard umask set.
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# Create an empty file here and force its permission to 0644, otherwise
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# dnsmasq will not be able to re-read the resolv.conf.auto .
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[ ! -f /tmp/resolv.conf.auto ] && {
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touch /tmp/resolv.conf.auto
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chmod 0644 /tmp/resolv.conf.auto
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}
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local dns
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local add
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for dns in "$@"; do
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grep -qsF "nameserver $dns" /tmp/resolv.conf.auto || {
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add="${add:+$add }$dns"
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echo "nameserver $dns" >> /tmp/resolv.conf.auto
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}
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done
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[ -n "$cfg" ] && {
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uci_set_state network "$cfg" dns "$add"
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uci_set_state network "$cfg" resolv_dns "$add"
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}
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}
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# remove dns entries of the given iface
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remove_dns() {
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local cfg="$1"
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[ -n "$cfg" ] && {
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[ -f /tmp/resolv.conf.auto ] && {
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local dns=$(uci_get_state network "$cfg" resolv_dns)
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for dns in $dns; do
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sed -i -e "/^nameserver $dns$/d" /tmp/resolv.conf.auto
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done
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}
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uci_revert_state network "$cfg" dns
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uci_revert_state network "$cfg" resolv_dns
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}
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}
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# sort the device list, drop duplicates
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sort_list() {
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local arg="$*"
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(
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for item in $arg; do
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echo "$item"
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done
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) | sort -u
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}
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# Create the interface, if necessary.
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# Return status 0 indicates that the setup_interface() call should continue
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# Return status 1 means that everything is set up already.
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prepare_interface() {
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local iface="$1"
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local config="$2"
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local vifmac="$3"
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# if we're called for the bridge interface itself, don't bother trying
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# to create any interfaces here. The scripts have already done that, otherwise
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# the bridge interface wouldn't exist.
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[ "br-$config" = "$iface" -o -e "$iface" ] && return 0;
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ifconfig "$iface" 2>/dev/null >/dev/null && {
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local proto
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config_get proto "$config" proto
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# make sure the interface is removed from any existing bridge and deconfigured,
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# (deconfigured only if the interface is not set to proto=none)
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unbridge "$iface"
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[ "$proto" = none ] || ifconfig "$iface" 0.0.0.0
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# Change interface MAC address if requested
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[ -n "$vifmac" ] && {
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ifconfig "$iface" down
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ifconfig "$iface" hw ether "$vifmac" up
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}
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}
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# Setup VLAN interfaces
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add_vlan "$iface" && return 1
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ifconfig "$iface" 2>/dev/null >/dev/null || return 0
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# Setup bridging
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local iftype
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config_get iftype "$config" type
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case "$iftype" in
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bridge)
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local macaddr
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config_get macaddr "$config" macaddr
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[ -x /usr/sbin/brctl ] && {
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# Remove IPv6 link local addr before adding the iface to the bridge
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local llv6="$(ifconfig "$iface")"
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case "$llv6" in
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*fe80:*/64*)
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llv6="${llv6#* fe80:}"
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ifconfig "$iface" del "fe80:${llv6%% *}"
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;;
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esac
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ifconfig "br-$config" 2>/dev/null >/dev/null && {
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local newdevs devices
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config_get devices "$config" device
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for dev in $(sort_list "$devices" "$iface"); do
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append newdevs "$dev"
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done
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uci_set_state network "$config" device "$newdevs"
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$DEBUG ifconfig "$iface" 0.0.0.0
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$DEBUG brctl addif "br-$config" "$iface"
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# Bridge existed already. No further processing necesary
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} || {
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local stp
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config_get_bool stp "$config" stp 0
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$DEBUG brctl addbr "br-$config"
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$DEBUG brctl setfd "br-$config" 0
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$DEBUG ifconfig "br-$config" up
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$DEBUG ifconfig "$iface" 0.0.0.0
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$DEBUG brctl addif "br-$config" "$iface"
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$DEBUG brctl stp "br-$config" $stp
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# Creating the bridge here will have triggered a hotplug event, which will
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# result in another setup_interface() call, so we simply stop processing
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# the current event at this point.
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}
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ifconfig "$iface" ${macaddr:+hw ether "${macaddr}"} up 2>/dev/null >/dev/null
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return 1
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}
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;;
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esac
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return 0
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}
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set_interface_ifname() {
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local config="$1"
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local ifname="$2"
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local device
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config_get device "$1" device
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uci_set_state network "$config" ifname "$ifname"
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uci_set_state network "$config" device "$device"
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}
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setup_interface_none() {
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env -i ACTION="ifup" INTERFACE="$2" DEVICE="$1" PROTO=none /sbin/hotplug-call "iface" &
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}
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setup_interface_static() {
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local iface="$1"
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local config="$2"
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local ipaddr netmask ip6addr
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config_get ipaddr "$config" ipaddr
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config_get netmask "$config" netmask
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config_get ip6addr "$config" ip6addr
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[ -z "$ipaddr" -o -z "$netmask" ] && [ -z "$ip6addr" ] && return 1
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local gateway ip6gw dns bcast
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config_get gateway "$config" gateway
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config_get ip6gw "$config" ip6gw
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config_get dns "$config" dns
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config_get bcast "$config" broadcast
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[ -z "$ipaddr" ] || $DEBUG ifconfig "$iface" "$ipaddr" netmask "$netmask" broadcast "${bcast:-+}"
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[ -z "$ip6addr" ] || $DEBUG ifconfig "$iface" add "$ip6addr"
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[ -z "$gateway" ] || $DEBUG route add default gw "$gateway" dev "$iface"
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[ -z "$ip6gw" ] || $DEBUG route -A inet6 add default gw "$ip6gw" dev "$iface"
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[ -z "$dns" ] || add_dns "$config" $dns
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config_get type "$config" TYPE
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[ "$type" = "alias" ] && return 0
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env -i ACTION="ifup" INTERFACE="$config" DEVICE="$iface" PROTO=static /sbin/hotplug-call "iface" &
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}
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setup_interface_alias() {
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local config="$1"
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local parent="$2"
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local iface="$3"
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local cfg
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config_get cfg "$config" interface
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[ "$parent" == "$cfg" ] || return 0
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# parent device and ifname
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local p_device p_type
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config_get p_device "$cfg" device
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config_get p_type "$cfg" type
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# select alias ifname
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local layer use_iface
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config_get layer "$config" layer 2
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case "$layer:$p_type" in
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# layer 3: e.g. pppoe-wan or pptp-vpn
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3:*) use_iface="$iface" ;;
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# layer 2 and parent is bridge: e.g. br-wan
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2:bridge) use_iface="br-$cfg" ;;
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# layer 1: e.g. eth0 or ath0
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*) use_iface="$p_device" ;;
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esac
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# alias counter
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local ctr
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config_get ctr "$parent" alias_count 0
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ctr="$(($ctr + 1))"
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config_set "$parent" alias_count "$ctr"
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# alias list
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local list
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config_get list "$parent" aliases
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append list "$config"
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config_set "$parent" aliases "$list"
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use_iface="$use_iface:$ctr"
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set_interface_ifname "$config" "$use_iface"
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local proto
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config_get proto "$config" proto "static"
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case "${proto}" in
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static)
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setup_interface_static "$use_iface" "$config"
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;;
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*)
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echo "Unsupported type '$proto' for alias config '$config'"
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return 1
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;;
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esac
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}
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setup_interface() {
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local iface="$1"
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local config="$2"
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local proto="$3"
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local vifmac="$4"
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[ -n "$config" ] || {
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config=$(find_config "$iface")
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[ "$?" = 0 ] || return 1
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}
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prepare_interface "$iface" "$config" "$vifmac" || return 0
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[ "$iface" = "br-$config" ] && {
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# need to bring up the bridge and wait a second for
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# it to switch to the 'forwarding' state, otherwise
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# it will lose its routes...
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ifconfig "$iface" up
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sleep 1
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}
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# Interface settings
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grep "$iface:" /proc/net/dev > /dev/null && {
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local mtu macaddr
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config_get mtu "$config" mtu
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config_get macaddr "$config" macaddr
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[ -n "$macaddr" ] && $DEBUG ifconfig "$iface" down
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$DEBUG ifconfig "$iface" ${macaddr:+hw ether "$macaddr"} ${mtu:+mtu $mtu} up
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}
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set_interface_ifname "$config" "$iface"
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[ -n "$proto" ] || config_get proto "$config" proto
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case "$proto" in
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static)
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setup_interface_static "$iface" "$config"
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;;
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dhcp)
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local lockfile="/var/lock/dhcp-$iface"
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lock "$lockfile"
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# prevent udhcpc from starting more than once
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local pidfile="/var/run/dhcp-${iface}.pid"
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local pid="$(cat "$pidfile" 2>/dev/null)"
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if [ -d "/proc/$pid" ] && grep -qs udhcpc "/proc/${pid}/cmdline"; then
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lock -u "$lockfile"
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else
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local ipaddr netmask hostname proto1 clientid broadcast
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config_get ipaddr "$config" ipaddr
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config_get netmask "$config" netmask
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config_get hostname "$config" hostname
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config_get proto1 "$config" proto
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config_get clientid "$config" clientid
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config_get_bool broadcast "$config" broadcast 0
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[ -z "$ipaddr" ] || \
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$DEBUG ifconfig "$iface" "$ipaddr" ${netmask:+netmask "$netmask"}
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# don't stay running in background if dhcp is not the main proto on the interface (e.g. when using pptp)
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local dhcpopts
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[ ."$proto1" != ."$proto" ] && dhcpopts="-n -q"
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[ "$broadcast" = 1 ] && broadcast="-O broadcast" || broadcast=
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$DEBUG eval udhcpc -t 0 -i "$iface" \
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${ipaddr:+-r $ipaddr} \
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${hostname:+-H $hostname} \
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${clientid:+-c $clientid} \
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-b -p "$pidfile" $broadcast \
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${dhcpopts:- -O rootpath -R &}
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lock -u "$lockfile"
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fi
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;;
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none)
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setup_interface_none "$iface" "$config"
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;;
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*)
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if ( eval "type setup_interface_$proto" ) >/dev/null 2>/dev/null; then
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eval "setup_interface_$proto '$iface' '$config' '$proto'"
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else
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echo "Interface type $proto not supported."
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return 1
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fi
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;;
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esac
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}
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stop_interface_dhcp() {
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local config="$1"
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local ifname
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config_get ifname "$config" ifname
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local lock="/var/lock/dhcp-${ifname}"
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[ -f "$lock" ] && lock -u "$lock"
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remove_dns "$config"
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local pidfile="/var/run/dhcp-${ifname}.pid"
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local pid="$(cat "$pidfile" 2>/dev/null)"
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[ -d "/proc/$pid" ] && {
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grep -qs udhcpc "/proc/$pid/cmdline" && kill -TERM $pid && \
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while grep -qs udhcpc "/proc/$pid/cmdline"; do sleep 1; done
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rm -f "$pidfile"
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}
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uci -P /var/state revert "network.$config"
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}
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unbridge() {
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local dev="$1"
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local brdev
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[ -x /usr/sbin/brctl ] || return 0
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brctl show 2>/dev/null | grep "$dev" >/dev/null && {
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# interface is still part of a bridge, correct that
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for brdev in $(brctl show | awk '$2 ~ /^[0-9].*\./ { print $1 }'); do
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brctl delif "$brdev" "$dev" 2>/dev/null >/dev/null
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done
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}
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}
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