Date: Fri, 11 Jun 1999 09:36:44 -0700 (PDT) From: m.seaman@inpharmatica.co.uk To: freebsd-gnats-submit@freebsd.org Subject: bin/12136: /sbin/dhclient-script: weird route commands Message-ID: <19990611163644.A401E154F7@hub.freebsd.org>
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>Number: 12136
>Category: bin
>Synopsis: /sbin/dhclient-script: weird route commands
>Confidential: no
>Severity: serious
>Priority: high
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Fri Jun 11 09:40:01 PDT 1999
>Closed-Date:
>Last-Modified:
>Originator: Matthew Seaman
>Release: 3.2-STABLE of Fri Jun 11 09:31:00 BST 1999
>Organization:
Inpharmatica Ltd
>Environment:
FreeBSD b0.farm.inpharmatica.co.uk 3.2-STABLE FreeBSD 3.2-STABLE #0: Fri Jun 11 09:31:00 BST 1999 matthew@b9.farm.inpharmatica.co.uk:/usr/src/sys/compile/FARM alpha
>Description:
/sbin/dhclient-script will attempt to add a route from any new interface
IP address via 127.1 (or via 127.0.0.1 for aliases):
route add $new_ip_address 127.1 >/dev/null 2>&1
which doesn't seem to achieve anything except causing the system log to
fill up with lines like:
Jun 11 02:23:43 b0 /kernel: arplookup 127.0.0.1 failed: could not allocate llinfo
Jun 11 02:23:43 b0 /kernel: arpresolve: can't allocate llinfo for 127.0.0.1rt
These repeat every 16 or so seconds ad-infinitum. Since there are two
lines, syslogd's usual "last message repeated N times" mechanism
doesn't happen either.
>How-To-Repeat:
Install DHCP server on network
configure kernel on test machine with bpfilter
touch /etc/dhclient.conf
Assuming interface to be managed by dhcp is de0:
cat <<FOO > /etc/start_if.de0
#!/bin/sh
/sbin/dhclient de0
FOO
Comment out defaultrouter and ifconfig_de0 lines in /etc/rc.conf
Reboot
>Fix:
Apply this patch.
--- /sbin/dhclient-script.orig Fri Jun 11 16:37:20 1999
+++ /sbin/dhclient-script Fri Jun 11 16:51:41 1999
@@ -62,7 +62,7 @@
if [ x$reason = xPREINIT ]; then
if [ x$alias_ip_address != x ]; then
ifconfig $interface inet -alias $alias_ip_address > /dev/null 2>&1
- route delete $alias_ip_address 127.0.0.1 > /dev/null 2>&1
+ #route delete $alias_ip_address 127.0.0.1 > /dev/null 2>&1
fi
ifconfig $interface inet 0.0.0.0 netmask 0.0.0.0 \
broadcast 255.255.255.255 up
@@ -82,7 +82,6 @@
fi
if [ x$old_ip_address != x ] && [ x$old_ip_address != x$new_ip_address ]; then
ifconfig $interface inet -alias $old_ip_address $medium
- route delete $old_ip_address 127.1 >/dev/null 2>&1
for router in $old_routers; do
route delete default $router >/dev/null 2>&1
done
@@ -99,7 +98,6 @@
[ x$reason = xBOUND ] || [ x$reason = xREBOOT ]; then
ifconfig $interface inet $new_ip_address $new_netmask_arg \
$new_broadcast_arg $medium
- route add $new_ip_address 127.1 >/dev/null 2>&1
for router in $new_routers; do
route add default $router >/dev/null 2>&1
done
@@ -115,7 +113,6 @@
if [ x$new_ip_address != x$alias_ip_address ] && [ x$alias_ip_address != x ];
then
ifconfig $interface inet alias $alias_ip_address $alias_subnet_arg
- route add $alias_ip_address 127.0.0.1
fi
echo search $new_domain_name >/etc/resolv.conf
for nameserver in $new_domain_name_servers; do
@@ -127,11 +124,9 @@
if [ x$reason = xEXPIRE ] || [ x$reason = xFAIL ]; then
if [ x$alias_ip_address != x ]; then
ifconfig $interface inet -alias $alias_ip_address > /dev/null 2>&1
- route delete $alias_ip_address 127.0.0.1 > /dev/null 2>&1
fi
if [ x$old_ip_address != x ]; then
ifconfig $interface inet -alias $old_ip_address $medium
- route delete $old_ip_address 127.1 >/dev/null 2>&1
for router in $old_routers; do
route delete default $router >/dev/null 2>&1
done
@@ -147,7 +142,6 @@
fi
if [ x$alias_ip_address != x ]; then
ifconfig $interface inet alias $alias_ip_address $alias_subnet_arg
- route add $alias_ip_address 127.0.0.1
fi
exit_with_hooks 0
fi
@@ -155,7 +149,6 @@
if [ x$reason = xTIMEOUT ]; then
if [ x$alias_ip_address != x ]; then
ifconfig $interface inet -alias $alias_ip_address > /dev/null 2>&1
- route delete $alias_ip_address 127.0.0.1 > /dev/null 2>&1
fi
ifconfig $interface inet $new_ip_address $new_netmask_arg \
$new_broadcast_arg $medium
@@ -167,9 +160,7 @@
if [ x$new_ip_address != x$alias_ip_address ] && \
[ x$alias_ip_address != x ]; then
ifconfig $interface inet alias $alias_ip_address $alias_subnet_arg
- route add $alias_ip_address 127.0.0.1
fi
- route add $new_ip_address 127.1 >/dev/null 2>&1
for router in $new_routers; do
route add default $router >/dev/null 2>&1
done
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