- The dhclient-script was updated to create a host route for the default

  gateway if the supplied subnet mask for an IPv4 address was a /32.  This
  allows the client to work in 'captive' network environments, where the
  operator does not want clients to crosstalk directly.  [ISC-Bugs #17200]

3 files changed, 21 insertions, 1 deletions

diff --git a/RELNOTES b/RELNOTES
index ec681ac8..99d56e40 100644
--- a/RELNOTES
+++ b/RELNOTES
@@ -121,6 +121,11 @@ suggested fixes to <dhcp-users@isc.org>.
 - Fixed a compilation problems on platforms that define a value for FDDI,
   which conflicts with a dhcp configuration syntax token by the same name.
 
+- The dhclient-script was updated to create a host route for the default
+  gateway if the supplied subnet mask for an IPv4 address was a /32.  This
+  allows the client to work in 'captive' network environments, where the
+  operator does not want clients to crosstalk directly.
+
 			Changes since 4.0.0b3
 
 - The reverse dns name for PTR updates on IPv6 addresses has been fixed to
diff --git a/client/scripts/freebsd b/client/scripts/freebsd
index 988c9ef0..67ff002e 100755
--- a/client/scripts/freebsd
+++ b/client/scripts/freebsd
@@ -1,6 +1,6 @@
 #!/bin/sh
 #
-# $Id: freebsd,v 1.20 2007/11/30 21:28:29 fdupont Exp $
+# $Id: freebsd,v 1.21 2008/01/16 23:02:10 dhankins Exp $
 #
 # $FreeBSD$
 
@@ -186,6 +186,12 @@ if [ x$reason = xBOUND ] || [ x$reason = xRENEW ] || \
     fi
     route add $new_ip_address 127.1 >/dev/null 2>&1
     for router in $new_routers; do
+      # If the subnet is captive, eg the netmask is /32 but the default
+      # gateway is (obviously) outside of this, then we need to produce a
+      # host route to reach the gateway.
+      if [ "x$new_subnet_mask" = "x255.255.255.255" ] ; then
+	route add -host $router -interface $interface
+      fi
       route add default $router >/dev/null 2>&1
     done
     if [ -n "$new_static_routes" ]; then
@@ -257,6 +263,9 @@ if [ x$reason = xTIMEOUT ]; then
       fi
       route add $new_ip_address 127.1 >/dev/null 2>&1
       for router in $new_routers; do
+	if [ "x$new_subnet_mask" = "x255.255.255.255" ] ; then
+	  route add -host $router -interface $interface
+	fi
 	route add default $router >/dev/null 2>&1
       done
       set -- $new_static_routes
diff --git a/client/scripts/linux b/client/scripts/linux
index 6ac25dd4..a0fcab55 100755
--- a/client/scripts/linux
+++ b/client/scripts/linux
@@ -166,6 +166,9 @@ if [ x$reason = xBOUND ] || [ x$reason = xRENEW ] || \
       route add -net $new_network_number $new_subnet_arg dev $interface
     fi
     for router in $new_routers; do
+      if [ "x$new_subnet_mask" = "x255.255.255.255" ] ; then
+	route add -host $router dev $interface
+      fi
       route add default gw $router
     done
   fi
@@ -214,6 +217,9 @@ if [ x$reason = xTIMEOUT ]; then
       route add -net $new_network_number
     fi
     for router in $new_routers; do
+      if [ "x$new_subnet_mask" = "x255.255.255.255" ] ; then
+	route add -host $router dev $interface
+      fi
       route add default gw $router
     done
     make_resolv_conf