diff options
Diffstat (limited to 'client/scripts/openbsd')
| -rwxr-xr-x[-rw-r--r--] | client/scripts/openbsd | 60 |
1 files changed, 55 insertions, 5 deletions
diff --git a/client/scripts/openbsd b/client/scripts/openbsd index e7f4746f..afb79241 100644..100755 --- a/client/scripts/openbsd +++ b/client/scripts/openbsd @@ -48,6 +48,53 @@ exit_with_hooks() { exit $exit_status } +# This function was largely borrowed from dhclient-script that +# ships with Centos, authored by Jiri Popelka and David Cantrell +# of Redhat. Thanks guys. +add_ipv6_addr_with_DAD() { + ifconfig ${interface} inet6 ${new_ip6_address}/${new_ip6_prefixlen} alias + + if [ ${dad_wait_time} -le 0 ] + then + # if we're not waiting for DAD, assume we're good + return 0 + fi + + # Repeatedly test whether newly added address passed + # duplicate address detection (DAD) + i=0 + while [ $i -lt ${dad_wait_time} ]; do + sleep 1 # give the DAD some time + + addr=$(ifconfig ${interface} \ + | grep "${new_ip6_address} prefixlen ${new_ip6_prefixlen}") + + # tentative flag == DAD is still not complete + tentative=$(echo "${addr}" | grep tentative) + # dadfailed flag == address is already in use somewhere else + dadfailed=$(echo "${addr}" | grep duplicated) + + if [ -n "${dadfailed}" ] ; then + # dad failed, remove the address + ifconfig ${interface} inet6 ${new_ip6_address}/${new_ip6_prefixlen} -alias + exit_with_hooks 3 + fi + + if [ -z "${tentative}" ] ; then + if [ -n "${addr}" ]; then + # DAD is over + return 0 + else + # address was auto-removed (or not added at all) + exit_with_hooks 3 + fi + fi + true $(( i++ )) + done + + return 0 +} + # Invoke the local dhcp client enter hooks, if they exist. if [ -f /etc/dhclient-enter-hooks ]; then exit_status=0 @@ -261,13 +308,14 @@ if [ ${reason} = PREINIT6 ] ; then # We need to give the kernel some time to active interface interface_up_wait_time=5 - for i in $(seq 0 ${interface_up_wait_time}) - do + i=0 + while [ $i -lt ${interface_up_wait_time} ]; do ifconfig ${interface} | grep inactive >/dev/null 2>&1 if [ $? -ne 0 ]; then break; fi sleep 1 + true $(( i++ )) done # Wait for duplicate address detection for this interface if the @@ -281,8 +329,8 @@ if [ ${reason} = PREINIT6 ] ; then if [ $? -eq 0 ]; then # Wait for duplicate address detection to complete or for # the timeout specified as --dad-wait-time. - for i in $(seq 0 $dad_wait_time) - do + i=0 + while [ $i -lt ${dad_wait_time} ]; do # We're going to poll for the tentative flag every second. sleep 1 ifconfig ${interface} | grep inet6 | grep tentative \ @@ -290,6 +338,7 @@ if [ ${reason} = PREINIT6 ] ; then if [ $? -ne 0 ]; then break; fi + true $(( i++ )) done fi fi @@ -308,7 +357,8 @@ if [ ${reason} = BOUND6 ] ; then exit_with_hooks 2; fi - ifconfig ${interface} inet6 alias ${new_ip6_address}/${new_ip6_prefixlen} + # Add address to interface, check for DAD if dad_wait_time > 0 + add_ipv6_addr_with_DAD # Check for nameserver options. make_resolv_conf |