add basic interface alias support.

for now (since we don't use ip in our network scripts yet), it adds :1, :2, ... alias interfaces
this will change when we add support for the ip utility, but the config format will remain the same.
example:

config alias     test
option interface lan
option ipaddr    192.168.1.1
option netmask   255.255.0.0

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@12241 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/package/base-files/files/lib/network/config.sh b/package/base-files/files/lib/network/config.sh
index 0a74644..13e1980 100755 (executable)
--- a/package/base-files/files/lib/network/config.sh
+++ b/package/base-files/files/lib/network/config.sh
@@ -142,6 +142,66 @@ set_interface_ifname() {
        uci_set_state network "$config" device "$device"
 }
 
+setup_interface_static() {
+       local iface="$1"
+       local config="$2"
+
+       config_get ipaddr "$config" ipaddr
+       config_get netmask "$config" netmask
+       config_get ip6addr "$config" ip6addr
+       [ -z "$ipaddr" -o -z "$netmask" ] && [ -z "$ip6addr" ] && return 1
+       
+       config_get gateway "$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 $ns" >> /tmp/resolv.conf.auto
+                       }
+               done
+       }
+
+       env -i ACTION="ifup" INTERFACE="$config" DEVICE="$iface" PROTO=static /sbin/hotplug-call "iface" &
+}
+
+setup_interface_alias() {
+       local config="$1"
+       local parent="$2"
+       local iface="$3"
+
+       config_get cfg "$config" interface
+       [ "$parent" == "$cfg" ] || return 0
+
+       # alias counter
+       config_get ctr "$parent" alias_count
+       ctr="$(($ctr + 1))"
+       config_set "$parent" alias_count "$ctr"
+
+       # alias list
+       config_get list "$parent" aliases
+       append list "$config"
+       config_set "$parent" aliases "$list"
+
+       set_interface_ifname "$config" "$iface:$ctr"
+       config_get proto "$config" proto
+       case "${proto:-static}" in
+               static)
+                       setup_interface_static "$iface:$ctr" "$config"
+               ;;
+               *) 
+                       echo "Unsupported type '$proto' for alias config '$config'"
+                       return 1
+               ;;
+       esac
+}
+
 setup_interface() {
        local iface="$1"
        local config="$2"
@@ -174,52 +234,30 @@ setup_interface() {
        pidfile="/var/run/$iface.pid"
        case "$proto" in
                static)
-                       config_get ipaddr "$config" ipaddr
-                       config_get netmask "$config" netmask
-                       config_get ip6addr "$config" ip6addr
-                       [ -z "$ipaddr" -o -z "$netmask" ] && [ -z "$ip6addr" ] && return 1
-                       
-                       config_get gateway "$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 $ns" >> /tmp/resolv.conf.auto
-                                       }
-                               done
-                       }
-
-                       env -i ACTION="ifup" INTERFACE="$config" DEVICE="$iface" PROTO=static /sbin/hotplug-call "iface" &
+                       setup_interface_static "$iface" "$config"
                ;;
                dhcp)
                        # prevent udhcpc from starting more than once
                        lock "/var/lock/dhcp-$iface"
                        pid="$(cat "$pidfile" 2>/dev/null)"
-                       [ -d "/proc/$pid" ] && grep udhcpc "/proc/${pid}/cmdline" >/dev/null 2>/dev/null && {
+                       if [ -d "/proc/$pid" ] && grep udhcpc "/proc/${pid}/cmdline" >/dev/null 2>/dev/null; then
                                lock -u "/var/lock/dhcp-$iface"
-                               return 0
-                       }
+                       else
 
-                       config_get ipaddr "$config" ipaddr
-                       config_get netmask "$config" netmask
-                       config_get hostname "$config" hostname
-                       config_get proto1 "$config" proto
-                       config_get clientid "$config" clientid
+                               config_get ipaddr "$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" "$ipaddr" ${netmask:+netmask "$netmask"}
+                               [ -z "$ipaddr" ] || \
+                                       $DEBUG ifconfig "$iface" "$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)
-                       [ ."$proto1" != ."$proto" ] && dhcpopts="-n -q"
-                       $DEBUG eval udhcpc -t 0 -i "$iface" ${ipaddr:+-r $ipaddr} ${hostname:+-H $hostname} ${clientid:+-c $clientid} -b -p "$pidfile" ${dhcpopts:- -R &}
-                       lock -u "/var/lock/dhcp-$iface"
+                               # don't stay running in background if dhcp is not the main proto on the interface (e.g. when using pptp)
+                               [ ."$proto1" != ."$proto" ] && dhcpopts="-n -q"
+                               $DEBUG eval udhcpc -t 0 -i "$iface" ${ipaddr:+-r $ipaddr} ${hostname:+-H $hostname} ${clientid:+-c $clientid} -b -p "$pidfile" ${dhcpopts:- -R &}
+                               lock -u "/var/lock/dhcp-$iface"
+                       fi
                ;;
                *)
                        if ( eval "type setup_interface_$proto" ) >/dev/null 2>/dev/null; then
@@ -230,6 +268,11 @@ setup_interface() {
                        fi
                ;;
        esac
+       config_set "$config" aliases ""
+       config_set "$config" alias_count 0
+       config_foreach setup_interface_alias alias "$config" "$iface"
+       config_get aliases "$config" aliases
+       [ -z "$aliases" ] || uci_set_state network "$config" aliases "$aliases"
 }
 
 unbridge() {

diff --git a/package/base-files/files/sbin/ifdown b/package/base-files/files/sbin/ifdown
index 7cc87de..9eadad3 100755 (executable)
--- a/package/base-files/files/sbin/ifdown
+++ b/package/base-files/files/sbin/ifdown
@@ -64,4 +64,8 @@ config_get iftype "$cfg" type
 # remove the interface's network state
 uci_revert_state network "$1"
 
-
+# revert aliases state as well
+config_get aliases "$1" aliases
+for config in $aliases; do
+       uci_revert_state network "$config"
+done