#!/bin/sh
+# set individualized routing table and policy for each network device
+
+
set -x
-IF="${1:?"usage: $0 <ether_device> [gateway] "}"
-GATEWAY=$2
+## INTERFACES(5)
+# IFACE physical name of the interface being processed
+# METHOD method of the interface (e.g., static)
+# MODE start if run from ifup, stop if run from ifdown
+# PHASE as per MODE, but with finer granularity, distinguishing the pre-
+# up, post-up, pre-down and post-down phases.
+
+# optional arugument to set default gateway manually
+GATEWAY=$1
-TID=`/sbin/ip addr show dev ${IF} | grep -w ${IF}: | cut -d : -f 1`
+TID=`/sbin/ip addr show dev ${IFACE} | grep -w ${IFACE}: | tr -s ' ' | cut -d : -f 1`
-if [ "${GATEWAY}" = "down" ]; then
+if [ "${PHASE}" = "post-down" ]; then
# delete routing table and policy and exit
## routing table is automatically flushed, so 'route flush' can be removed
/sbin/ip route flush table ${TID}
## device has no longer any IP addr, so do not use IPADDR
/sbin/ip rule del table ${TID} priority ${TID}
/sbin/ip route flush cache
- echo "remove routing table and policy for ${IF}"
+ echo "remove routing table and policy for ${IFACE}"
exit
fi
# get IP address, network mask, default gateway info
-IPADDR=`/sbin/ip addr show dev ${IF} | grep -w inet | cut -d t -f 2 | cut -d ' ' -f 2 | cut -d / -f 1`
-NETWORK=`/sbin/ip route show dev ${IF} | grep -w ${IPADDR} | cut -d ' ' -f 1`
+IPADDR=`/sbin/ip addr show dev ${IFACE} | grep -w inet | tr -s ' ' | cut -d ' ' -f 3 | cut -d / -f 1`
+if [ -z "${IPADDR}" ]; then
+ # fail to bind IP address to device
+ echo "${IFACE} has no IP address."
+ exit
+fi
+NETWORK=`/sbin/ip route show dev ${IFACE} | grep -w ${IPADDR} | tr -s ' ' | cut -d ' ' -f 1`
if [ -z "${GATEWAY}" ]; then
- GATEWAY=`/sbin/ip route show dev ${IF} | grep -w default | cut -d ' ' -f 3`
+ GATEWAY=`/sbin/ip route show dev ${IFACE} | grep -w default | tr -s ' ' | cut -d ' ' -f 3`
fi
if [ -z "${GATEWAY}" ]; then
- GATEWAY=`/sbin/ip route | grep -w default | cut -d ' ' -f 3`
+ GATEWAY=`/sbin/ip route | grep -w default | tr -s ' ' | cut -d ' ' -f 3`
# this may add wrong default route especially on RHEL
fi
# set routing table
-/sbin/ip route add ${NETWORK} dev ${IF} table ${TID}
-/sbin/ip route add default via ${GATEWAY} dev ${IF} table ${TID}
+/sbin/ip route add ${NETWORK} dev ${IFACE} table ${TID}
+/sbin/ip route add default via ${GATEWAY} dev ${IFACE} table ${TID}
# set routing policy
/sbin/ip rule add from ${IPADDR} table ${TID} priority ${TID}
/sbin/ip route flush cache
-echo "add routing table and policy for ${IF} on table ${TID}"
+echo "add routing table and policy for ${IFACE} on table ${TID}"