network config: ignore nonexistant interfaces

[openwrt/svn-archive/archive.git] / package / base-files / files / lib / network / config.sh

diff --git a/package/base-files/files/lib/network/config.sh b/package/base-files/files/lib/network/config.sh
index f3ead6a791d9ab81eb9ce691818d9b97f8f5884d..eee72c0cdee9822ac7a0d3f179b0263d3396361d 100755 (executable)
--- a/package/base-files/files/lib/network/config.sh
+++ b/package/base-files/files/lib/network/config.sh
@@ -24,6 +24,7 @@ find_config() {
 }
 
 scan_interfaces() {
+       local cfgfile="$1"
        local mode iftype iface ifname device
        interfaces=
        config_cb() {
@@ -50,7 +51,7 @@ scan_interfaces() {
                        ;;
                esac
        }
-       config_load network
+       config_load "${cfgfile:-network}"
 }
 
 add_vlan() {
@@ -62,19 +63,18 @@ add_vlan() {
        }
 }
 
-setup_interface() {
+# 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="$2"
-       local proto
-       local macaddr
-
-       [ -n "$config" ] || {
-               config=$(find_config "$iface")
-               [ "$?" = 0 ] || return 1
-       }
 
-       proto="${3:-$(config_get "$config" proto)}"
-       config_get iftype "$config" type
+       # 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.
+       [ "$iface" = "br-$config" ] && return 0;
        
        ifconfig "$iface" 2>/dev/null >/dev/null && {
                # make sure the interface is removed from any existing bridge and brought down
@@ -84,22 +84,53 @@ setup_interface() {
 
        # Setup VLAN interfaces
        add_vlan "$iface"
+       ifconfig "$iface" 2>/dev/null >/dev/null || return 0
 
        # Setup bridging
+       config_get iftype "$config" type
        case "$iftype" in
                bridge)
-                       ifconfig "$iface" up 2>/dev/null >/dev/null
-                       ifconfig "br-$config" 2>/dev/null >/dev/null && {
-                               $DEBUG brctl addif "br-$config" "$iface"
-                               return 0
-                       } || {
-                               $DEBUG brctl addbr "br-$config"
-                               $DEBUG brctl setfd "br-$config" 0
-                               $DEBUG brctl addif "br-$config" "$iface"
-                               iface="br-$config"
+                       [ -x /usr/sbin/brctl ] && {
+                               ifconfig "$iface" up 2>/dev/null >/dev/null
+                               ifconfig "br-$config" 2>/dev/null >/dev/null && {
+                                       $DEBUG brctl addif "br-$config" "$iface"
+                                       # Bridge existed already. No further processing necesary
+                               } || {
+                                       $DEBUG brctl addbr "br-$config"
+                                       $DEBUG brctl setfd "br-$config" 0
+                                       $DEBUG brctl addif "br-$config" "$iface"
+                                       # 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.
+                               }
+                               return 1
                        }
                ;;
        esac
+       return 0
+}
+
+setup_interface() {
+       local iface="$1"
+       local config="$2"
+       local proto
+       local macaddr
+
+       [ -n "$config" ] || {
+               config=$(find_config "$iface")
+               [ "$?" = 0 ] || return 1
+       }
+       proto="${3:-$(config_get "$config" proto)}"
+       
+       prepare_interface "$iface" "$config" || 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
        config_get mtu "$config" mtu
@@ -116,17 +147,19 @@ setup_interface() {
                        config_get ip6addr "$config" ip6addr
                        config_get gateway "$config" gateway
                        config_get dns "$config" dns
+                       config_get bcast "$config" broadcast
                        
-                       $DEBUG ifconfig "$iface" "$ipaddr" netmask "$netmask"
-                       $DEBUG ifconfig "$iface" inet6 add "$ip6addr" 
-                       [ -z "$gateway" ] || route add default gw "$gateway"
+                       [ -z "$ipaddr" ] || $DEBUG ifconfig "$iface" "$ipaddr" netmask "$netmask"
+                       [ -z "$ip6addr" ] || $DEBUG ifconfig "$iface" inet6 add "$ip6addr" 
+                       [ -z "$gateway" ] || $DEBUG route add default gw "$gateway"
+                       [ -z "$bcast" ] || $DEBUG ifconfig "$iface" broadcast "$bcast"
                        [ -z "$dns" -o -f /tmp/resolv.conf.auto ] || {
                                for ns in $dns; do
                                        echo "nameserver $ns" >> /tmp/resolv.conf.auto
                                done
                        }
 
-                       env -i ACTION="ifup" INTERFACE="$config" DEVICE="$iface" PROTO=static /sbin/hotplug "iface" &
+                       env -i ACTION="ifup" INTERFACE="$config" DEVICE="$iface" PROTO=static /sbin/hotplug-call "iface" &
                ;;
                dhcp)
                        # prevent udhcpc from starting more than once
@@ -164,7 +197,8 @@ setup_interface() {
 unbridge() {
        local dev="$1"
        local brdev
-
+       
+       [ -x /usr/sbin/brctl ] || return 0
        brctl show | grep "$dev" >/dev/null && {
                # interface is still part of a bridge, correct that