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Change-Id: I37ade764d873c701b35eac5881eb40412ba64a86
Story: 2002801
Task: 22687
Signed-off-by: Scott Little <scott.little@windriver.com>
64 lines
3.2 KiB
Diff
64 lines
3.2 KiB
Diff
From bafc4d1f7971edbe7cd411fbe2ee6876ded35c6e Mon Sep 17 00:00:00 2001
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From: Allain Legacy <allain.legacy@windriver.com>
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Date: Thu, 14 Apr 2016 12:04:55 -0400
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Subject: [PATCH] CGTS-3416: dhclient: restrict interfaces to those on command
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line only
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By default, the dhclient process does not respect the list of interfaces
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supplied at the command line. It configures any interfaces found to be
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specified in the config file. Since we customize options for each interface in
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our config file and run a separate dhclient process for each interface we end
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up with multiple dhclient processes that each service all interfaces. This is
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undesirable because it is possible that a request is sent by process A but
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received by process B. This leads to lease expiry events even though a valid
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request packet was returned by the server.
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This change introduces a "--restrict-interfaces" option to the dhclient process
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to force it to ignore all interfaces in config files other than those specified
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at the command line.
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To activate this change our version of ifup/ifdown has been modified to
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pass the "--restrict-interfaces" to dhclient as well as to request that each
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process use its own lease file to avoid file corruption.
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---
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sysconfig/network-scripts/ifdown-eth | 2 +-
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sysconfig/network-scripts/ifup-eth | 4 ++--
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2 files changed, 3 insertions(+), 3 deletions(-)
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diff --git a/sysconfig/network-scripts/ifdown-eth b/sysconfig/network-scripts/ifdown-eth
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index 7ccbddf..5b75162 100755
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--- a/sysconfig/network-scripts/ifdown-eth
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+++ b/sysconfig/network-scripts/ifdown-eth
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@@ -93,6 +93,6 @@ for VER in "" 6 ; do
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generate_lease_file_name $VER
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if is_true "$DHCPRELEASE"; then
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- /sbin/dhclient -r -lf ${LEASEFILE} -pf /var/run/dhclient$VER-${DEVICE}.pid ${DEVICE} >/dev/null 2>&1
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+ /sbin/dhclient -r -lf ${LEASEFILE} --restrict-interfaces -pf /var/run/dhclient$VER-${DEVICE}.pid ${DEVICE} >/dev/null 2>&1
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retcode=$?
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else
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kill $dhcpid >/dev/null 2>&1
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diff --git a/sysconfig/network-scripts/ifup-eth b/sysconfig/network-scripts/ifup-eth
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index 3da5c16..9bcf57f 100755
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--- a/sysconfig/network-scripts/ifup-eth
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+++ b/sysconfig/network-scripts/ifup-eth
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@@ -187,7 +187,7 @@ if [ -n "${DYNCONFIG}" ] && [ -x /sbin/dhclient ]; then
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generate_lease_file_name
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# Initialize the dhclient args and obtain the hostname options if needed:
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- DHCLIENTARGS="${DHCLIENTARGS} ${ONESHOT} -q ${DHCLIENTCONF} -lf ${LEASEFILE} -pf /var/run/dhclient-${DEVICE}.pid"
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+ DHCLIENTARGS="${DHCLIENTARGS} ${ONESHOT} -q ${DHCLIENTCONF} -lf ${LEASEFILE} --restrict-interfaces -pf /var/run/dhclient-${DEVICE}.pid"
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set_hostname_options DHCLIENTARGS
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echo
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@@ -333,6 +333,6 @@ if is_true "${DHCPV6C}" && [ -x /sbin/dhclient ]; then
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# Initialize the dhclient args for IPv6 and obtain the hostname options if needed:
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- DHCLIENTARGS="-6 -1 ${DHCPV6C_OPTIONS} ${DHCLIENTCONF} -lf ${LEASEFILE} -pf /var/run/dhclient6-${DEVICE}.pid ${DEVICE}"
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+ DHCLIENTARGS="-6 -1 ${DHCPV6C_OPTIONS} ${DHCLIENTCONF} -lf ${LEASEFILE} --restrict-interfaces -pf /var/run/dhclient6-${DEVICE}.pid ${DEVICE}"
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set_hostname_options DHCLIENTARGS
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if /sbin/dhclient $DHCLIENTARGS; then
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--
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1.9.1
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