Add METRIC= support for default routes (#124045)

* ifup-ppp, network-functions: Save all default routes, lose no data.
* network-functions:
  - (find_gateway_dev): Fix - it should find the device while $GATEWAY is not
    the default route
  - (add_default_route): Don't use configuration for the device that is being
    brought down; document function purpose and bugs.

11 files changed, 42 insertions, 25 deletions

diff --git a/sysconfig.txt b/sysconfig.txt
index b02dc53f..ff136580 100644
--- a/sysconfig.txt
+++ b/sysconfig.txt
@@ -503,6 +503,8 @@ Files in /etc/sysconfig/network-scripts/
     IPADDR=
     NETMASK=
     GATEWAY=
+    METRIC=
+      Metric for the default route using GATEWAY
     ONBOOT=yes|no
     HOTPLUG=yes|no
     USERCTL=yes|no
diff --git a/sysconfig/network-scripts/ifdown-post b/sysconfig/network-scripts/ifdown-post
index ed944950..87f28a16 100755
--- a/sysconfig/network-scripts/ifdown-post
+++ b/sysconfig/network-scripts/ifdown-post
@@ -25,9 +25,11 @@ if ! check_default_route ; then
     # ISDN device needs special handling dial on demand
     if [ "${DEVICETYPE}" = "ippp" -o "${DEVICETYPE}" = "isdn" ] && [ "$DIALMODE" = "auto" ] ; then
         if [ -z "$GATEWAY" ] ; then
-            /sbin/ip route add default ${WINDOW:+window $WINDOW} dev ${DEVICE}
+            /sbin/ip route add default ${METRIC:+metric} \
+		${WINDOW:+window $WINDOW} dev ${DEVICE}
         else
-            /sbin/ip route add default ${WINDOW:+window $WINDOW} via ${GATEWAY}
+            /sbin/ip route add default ${METRIC:+metric} \
+		${WINDOW:+window $WINDOW} via ${GATEWAY}
         fi
     else
         add_default_route ${DEVICE}
diff --git a/sysconfig/network-scripts/ifup-aliases b/sysconfig/network-scripts/ifup-aliases
index 6ac5d9a0..0d84ec0a 100755
--- a/sysconfig/network-scripts/ifup-aliases
+++ b/sysconfig/network-scripts/ifup-aliases
@@ -300,7 +300,8 @@ function new_interface ()
 			       \( -z "${GATEWAYDEV}" -o "${GATEWAYDEV}" = "${DEVICE}" \) ]; then
                                # set up default gateway, if it isn't already there
 			       if ! is_default_gateway "$GATEWAY"; then
-				       route add default gw ${GATEWAY} ${DEVICE}
+				       route add default gw ${GATEWAY} \
+					   ${METRIC:+metric $METRIC} ${DEVICE}
 			       fi
                        fi
 
diff --git a/sysconfig/network-scripts/ifup-ctc b/sysconfig/network-scripts/ifup-ctc
index 193c11b5..547fe094 100755
--- a/sysconfig/network-scripts/ifup-ctc
+++ b/sysconfig/network-scripts/ifup-ctc
@@ -47,7 +47,7 @@ fi
 if [ "${GATEWAY}" != "" ]; then
 	if [ "${GATEWAYDEV}" = "" -o "${GATEWAYDEV}" = "${DEVICE}" ]; then
 		# set up default gateway
-		route add default gw ${GATEWAY}
+		route add default gw ${GATEWAY} ${METRIC:+metric $METRIC}
 	fi
 fi
 
diff --git a/sysconfig/network-scripts/ifup-eth b/sysconfig/network-scripts/ifup-eth
index 081c3fd1..5d05c171 100755
--- a/sysconfig/network-scripts/ifup-eth
+++ b/sysconfig/network-scripts/ifup-eth
@@ -258,12 +258,14 @@ else
     if [ -z "${GATEWAYDEV}" -o "${GATEWAYDEV}" = "${REALDEVICE}" ]; then
 	# set up default gateway. replace if one already exists
 	if [ -n "${GATEWAY}" -a "`ipcalc --network ${GATEWAY} ${NETMASK} 2>/dev/null`" = "NETWORK=${NETWORK}" ]; then
-	    ip route replace default via ${GATEWAY} ${WINDOW:+window $WINDOW} ${SRC} ${GATEWAYDEV:+dev $GATEWAYDEV}
+	    ip route replace default ${METRIC:+metric $METRIC} \
+		via ${GATEWAY} ${WINDOW:+window $WINDOW} ${SRC} \
+		${GATEWAYDEV:+dev $GATEWAYDEV}
 	elif [ "${GATEWAYDEV}" = "${DEVICE}" ]; then
-	    ip route replace default ${SRC} ${WINDOW:+window $WINDOW} dev ${REALDEVICE}
+	    ip route replace default ${METRIC:+metric $METRIC} \
+		${SRC} ${WINDOW:+window $WINDOW} dev ${REALDEVICE}
 	fi
     fi
-    
 fi
 
 # Bonding initialization part II - for static, enslave the devices. For
diff --git a/sysconfig/network-scripts/ifup-ippp b/sysconfig/network-scripts/ifup-ippp
index 0defdeb6..e53cb36a 100755
--- a/sysconfig/network-scripts/ifup-ippp
+++ b/sysconfig/network-scripts/ifup-ippp
@@ -358,9 +358,11 @@ function addprovider()
         if  [ "$DEFROUTE" = "yes" ] ; then
             route del default >/dev/null 2>&1
             if [ "$GATEWAY" = "0.0.0.0" ]; then
-                route add default $DEVICE >/dev/null 2>&1
+                route add default ${METRIC:+metric $METRIC} $DEVICE \
+		    >/dev/null 2>&1
             else
-                route add default gw $GATEWAY >/dev/null 2>&1
+                route add default gw $GATEWAY ${METRIC:+metric $METRIC} \
+		    >/dev/null 2>&1
             fi
         fi
     fi
diff --git a/sysconfig/network-scripts/ifup-iucv b/sysconfig/network-scripts/ifup-iucv
index 1352eba2..645f6761 100755
--- a/sysconfig/network-scripts/ifup-iucv
+++ b/sysconfig/network-scripts/ifup-iucv
@@ -36,7 +36,7 @@ fi
 if [ "${GATEWAY}" != "" ]; then
 	if [ "${GATEWAYDEV}" = "" -o "${GATEWAYDEV}" = "${DEVICE}" ]; then
 		# set up default gateway
-		route add default gw ${GATEWAY}
+		route add default gw ${GATEWAY} ${METRIC:+metric $METRIC}
 	fi
 fi
 
diff --git a/sysconfig/network-scripts/ifup-plip b/sysconfig/network-scripts/ifup-plip
index c7c6bb88..dc766aa8 100755
--- a/sysconfig/network-scripts/ifup-plip
+++ b/sysconfig/network-scripts/ifup-plip
@@ -14,10 +14,10 @@ fi
 ifconfig ${DEVICE} ${IPADDR} pointopoint ${REMIP}
 route add -net ${NETWORK} netmask ${NETMASK} ${DEVICE}
 
-# this is broken! it's only here to keep compatibility with old RH sytstems
+# this is broken! it's only here to keep compatibility with old RH systems
 if [ "${GATEWAY}" != "" -a "${GATEWAY}" != "none" ]
 then
-	route add default gw ${GATEWAY} metric 1 ${DEVICE}
+	route add default gw ${GATEWAY} metric ${METRIC:-1} ${DEVICE}
 fi
 
 . /etc/sysconfig/network
@@ -25,7 +25,7 @@ fi
 if [ "${GATEWAY}" != "" ]; then
 	if [ "${GATEWAYDEV}" = "" -o "${GATEWAYDEV}" = "${DEVICE}" ]; then
 		# set up default gateway
-		route add default gw ${GATEWAY}
+		route add default gw ${GATEWAY} ${METRIC:+metric $METRIC}
 	fi
 fi
 
diff --git a/sysconfig/network-scripts/ifup-plusb b/sysconfig/network-scripts/ifup-plusb
index bec39d97..a31608ab 100755
--- a/sysconfig/network-scripts/ifup-plusb
+++ b/sysconfig/network-scripts/ifup-plusb
@@ -34,7 +34,7 @@ fi
 if [ "${GATEWAY}" != "" ]; then
 	if [ "${GATEWAYDEV}" = "" -o "${GATEWAYDEV}" = "${DEVICE}" ]; then
 		# set up default gateway
-		route add default gw ${GATEWAY}
+		route add default gw ${GATEWAY} ${METRIC:+metric $METRIC}
 	fi
 fi
 
diff --git a/sysconfig/network-scripts/ifup-ppp b/sysconfig/network-scripts/ifup-ppp
index ef6c81b9..eb749fc4 100755
--- a/sysconfig/network-scripts/ifup-ppp
+++ b/sysconfig/network-scripts/ifup-ppp
@@ -105,9 +105,11 @@ fi
 if [ "${DEFROUTE}" != no ] ; then
   # pppd will no longer delete an existing default route
   # so we have to help it out a little here.
-  DEFRT=`ip route list | awk '/^default / { print $3 }'`
-  [ -n "${DEFRT}" ] && echo $DEFRT > /etc/default-route
-  route del default >/dev/null 2>&1
+  DEFRT=$(ip route list match 0/0)
+  [ -n "${DEFRT}" ] && echo "$DEFRT" > /etc/default-routes
+  echo "$DEFRT" | while read spec; do
+      ip route del $spec;
+  done
   opts="$opts defaultroute"
 fi
 if [ "${PEERDNS}" != no ] ; then
diff --git a/sysconfig/network-scripts/network-functions b/sysconfig/network-scripts/network-functions
index d2372d00..aea5f0c9 100644
--- a/sysconfig/network-scripts/network-functions
+++ b/sysconfig/network-scripts/network-functions
@@ -314,15 +314,19 @@ find_gateway_dev ()
 {
     . /etc/sysconfig/network
     if [ -n "${GATEWAY}" -a "${GATEWAY}" != "none" ] ; then
-	dev=`LC_ALL=C /sbin/ip route | \
-             grep ${GATEWAY} | \
-             sed -e 's/.* dev \([:alnum:]*\)/\1/'`
+	dev=$(LC_ALL=C /sbin/ip route get to "${GATEWAY}" 2>/dev/null | \
+	    sed -n 's/.* dev \([[:alnum:]]*\) .*/\1/p')
 	if [ -n "$dev" ]; then
 	    GATEWAYDEV="$dev"
         fi
     fi
 }
 
+# After the device $1 goes away, restore the standard default route; typically
+# used for ppp with DEFROUTE temporarily replacing the "standard" default
+# route.
+# FIXME: This function doesn't support some newer features (GATEWAY in ifcfg,
+# $WINDOW, $METRIC)
 add_default_route ()
 {
     . /etc/sysconfig/network
@@ -332,14 +336,16 @@ add_default_route ()
  		"${GATEWAY}" != "none" ]; then
         if ! check_device_down $1; then
             if [ "$GATEWAY" = "0.0.0.0" ]; then
-                /sbin/ip route add default ${WINDOW:+window $WINDOW} dev ${GATEWAYDEV}
+                /sbin/ip route add default dev ${GATEWAYDEV}
             else
-                /sbin/ip route add default ${WINDOW:+window $WINDOW} via ${GATEWAY}
+                /sbin/ip route add default via ${GATEWAY}
             fi
         fi
-    elif [ -f /etc/default-route ]; then
-	/sbin/ip route add default ${WINDOW:+window $WINDOW} via `cat /etc/default-route`
-	rm -f /etc/default-route
+    elif [ -f /etc/default-routes ]; then
+	while read spec; do
+	    /sbin/ip route add $spec
+	done < /etc/default-routes
+	rm -f /etc/default-routes
     fi
 }