Bugfix 4951: Don't fail if IPv6 kernel module is not loaded.

Handle cases where IPv6 kernel module is not loaded more gracefully.

2 files changed, 30 insertions, 21 deletions

diff --git a/scripts/rl-system.init b/scripts/rl-system.init
index e05e0564..3ca02ed2 100755
--- a/scripts/rl-system.init
+++ b/scripts/rl-system.init
@@ -135,23 +135,30 @@ create_ssh_host_keys () {
 
 set_ipv6_params ()
 {
- # default values for ipv6 parameters do not take effect for interfaces at boot
- # time, so copy over default values to their interface specific parameter
- ipv6_params=(accept_source_route accept_redirects)
- num_ipv6_params=${#ipv6_params[*]}
- i=0
- while [ $i -lt $num_ipv6_params ]; do
-   default_val=`cat /proc/sys/net/ipv6/conf/default/${ipv6_params[$i]}`
-   array=(`ls /proc/sys/net/ipv6/conf/`)
-   array_len=${#array[*]}
-   j=0
-   while [ $j -lt $array_len ]; do
-     sudo sh -c "echo $default_val > \
-       /proc/sys/net/ipv6/conf/${array[$j]}/${ipv6_params[$i]}"
-     let j++
-   done
-   let i++
- done
+    # default values for ipv6 parameters do not take effect for interfaces at
+    # boot time, so copy over default values to their interface specific 
+    # parameter
+
+    if [ ! -d /proc/sys/net/ipv6 ]; then
+	# Skip it if IPv6 is not loaded
+	return
+    fi
+
+    ipv6_params=(accept_source_route accept_redirects)
+    num_ipv6_params=${#ipv6_params[*]}
+    i=0
+    while [ $i -lt $num_ipv6_params ]; do
+	default_val=`cat /proc/sys/net/ipv6/conf/default/${ipv6_params[$i]}`
+	array=(`ls /proc/sys/net/ipv6/conf/`)
+	array_len=${#array[*]}
+	    j=0
+	    while [ $j -lt $array_len ]; do
+		sudo sh -c "echo $default_val > \
+		    /proc/sys/net/ipv6/conf/${array[$j]}/${ipv6_params[$i]}"
+		let j++
+	    done
+	    let i++
+    done
 }
 
 setup_ntp_config_file () {
@@ -172,7 +179,7 @@ start () {
     setup_ntp_config_file
     add_new_serial_if || \
 	log_failure_msg "can\'t add serial interfaces"
-    sysctl -q -p /opt/vyatta/etc/vyatta-sysctl.conf ||
+    sysctl -q -e -p /opt/vyatta/etc/vyatta-sysctl.conf ||
         log_failure_msg "can\'t configure kernel settings"
     set_ipv6_params
     update_version_info
diff --git a/sysconf/vyatta-sysctl.conf b/sysconf/vyatta-sysctl.conf
index 5b888a8c..1f270d92 100644
--- a/sysconf/vyatta-sysctl.conf
+++ b/sysconf/vyatta-sysctl.conf
@@ -31,9 +31,6 @@ net.ipv4.icmp_ignore_bogus_error_responses=1
 # Send ICMP responses with primary address of exiting interface
 net.ipv4.icmp_errors_use_inbound_ifaddr=1
 
-# Enable packet forwarding for IPv6
-net.ipv6.conf.all.forwarding=1
-
 # Log packets with impossible addresses to kernel log
 net.ipv4.conf.all.log_martians=1
 
@@ -58,6 +55,11 @@ net.ipv4.conf.all.accept_source_route=0
 # Enable send_redirects by default
 net.ipv4.conf.all.send_redirects=1
 
+# IPv6 parameters:
+
+# Enable packet forwarding for IPv6
+net.ipv6.conf.all.forwarding=1
+
 # Disable ipv6 accept_source_route by default
 net.ipv6.conf.default.accept_source_route=-1