From 83c5f7d06c0bcb45a71c3ccc3f513903d38242c2 Mon Sep 17 00:00:00 2001
From: Bill Nottingham <notting@redhat.com>
Date: Mon, 11 Mar 2002 22:10:08 +0000
Subject: initial support for setting source addresses, for LVS

---
 sysconfig.txt                  |  3 +++
 sysconfig/network-scripts/ifup | 18 ++++++++++++++----
 2 files changed, 17 insertions(+), 4 deletions(-)

diff --git a/sysconfig.txt b/sysconfig.txt
index 85109c7e..0b4b7aef 100644
--- a/sysconfig.txt
+++ b/sysconfig.txt
@@ -455,6 +455,7 @@ Files in /etc/sysconfig/network-scripts/
     DEVICE=<name of physical device (except dynamically-allocated PPP
       devices where it is the "logical name")>
     IPADDR=
+    SRCADDR=
     NETMASK=
     GATEWAY=
     ONBOOT=yes|no
@@ -469,6 +470,8 @@ Files in /etc/sysconfig/network-scripts/
       file if PEERDNS is not set to "no".
     FIREWALL_MODS=yes|no
       modify firewall to attempt to allow DNS through. Defaults to 'yes'.
+    SRCADDR=
+      use the specified source address for outgoing packets
 
   If BOOTPROTO is not "none", then the only other item that
   must be set is the DEVICE item; all the rest will be determined
diff --git a/sysconfig/network-scripts/ifup b/sysconfig/network-scripts/ifup
index 012f982e..604757d3 100755
--- a/sysconfig/network-scripts/ifup
+++ b/sysconfig/network-scripts/ifup
@@ -210,13 +210,23 @@ else
     else
         SCOPE=
     fi
-
+    
+    if [ -n "$SRCADDR" ]; then
+       SRC="src $SRCADDR"
+    else
+       SRC=
+    fi
+    
     if ! LC_ALL=C ip addr ls ${REALDEVICE} | grep -q "${IPADDR}/${PREFIX}" ; then
 	 if ! ip addr add ${IPADDR}/${PREFIX} \
 	    brd ${BROADCAST:-+} dev ${REALDEVICE} ${SCOPE} label ${DEVICE}; then
 	    echo $"Error adding address ${IPADDR} for ${DEVICE}."
 	 fi
     fi
+    
+    if [ -n "$SRCADDR" ]; then
+           sysctl -w "net.ipv4.conf.${REALDEVICE}.arp_filter=1" >/dev/null 2>&1
+    fi
 
     # update ARP cache of neighboring computers
     arping -q -A -c 1 -I ${REALDEVICE} ${IPADDR}
@@ -225,16 +235,16 @@ else
 
     # Add a route for the subnet.  Replace any existing route.
     if [ "${ISALIAS}" = no ]; then
-	ip route replace ${NETWORK}/${PREFIX} dev ${REALDEVICE}
+	ip route replace ${NETWORK}/${PREFIX} ${SRC} dev ${REALDEVICE}
     fi
 
     # Set a default route.
     if [ -z "${GATEWAYDEV}" -o "${GATEWAYDEV}" = "${REALDEVICE}" ]; then
 	# set up default gateway
 	if [ -n "${GATEWAY}" -a "`ipcalc --network ${GATEWAY} ${NETMASK} 2>/dev/null`" = "NETWORK=${NETWORK}" ]; then
-	    ip route add default via ${GATEWAY}
+	    ip route add default via ${GATEWAY} ${SRC}
 	elif [ "${GATEWAYDEV}" = "${DEVICE}" ]; then
-	    ip route add default dev ${REALDEVICE}
+	    ip route add default ${SRC} dev ${REALDEVICE}
 	fi
     fi
 fi
-- 
cgit v1.2.1