fix , Windows 2008 32bit instance can't get IP address,

Anthony Xu · Anthony Xu · commit fdc9f10cc170 · 2013-05-29T16:01:22.000-07:00
normally, in dhcp reply, the target ip is allocated ip for VM.
but windows 2008 32bit has special field in dhcp reply, which makes dhcp reply use 255.255.255.255 as target ip, which is blocked by SG rule,
diff --git a/scripts/vm/hypervisor/xenserver/vmops b/scripts/vm/hypervisor/xenserver/vmops
@@ -541,6 +541,7 @@ def default_ebtables_rules():
         util.pread2(['ebtables', '-N',  'DEFAULT_EBTABLES'])
         util.pread2(['ebtables', '-A', 'FORWARD', '-j'  'DEFAULT_EBTABLES'])
         util.pread2(['ebtables', '-A', 'DEFAULT_EBTABLES', '-p', 'IPv4', '--ip-dst', '255.255.255.255', '--ip-proto', 'udp', '--ip-dport', '67', '-j', 'ACCEPT'])
+        util.pread2(['ebtables', '-A', 'DEFAULT_EBTABLES', '-p', 'IPv4', '--ip-dst', '255.255.255.255', '--ip-proto', 'udp', '--ip-dport', '68', '-j', 'ACCEPT'])
         util.pread2(['ebtables', '-A', 'DEFAULT_EBTABLES', '-p', 'ARP', '--arp-op', 'Request', '-j', 'ACCEPT'])
         util.pread2(['ebtables', '-A', 'DEFAULT_EBTABLES', '-p', 'ARP', '--arp-op', 'Reply', '-j', 'ACCEPT'])
         # deny mac broadcast and multicast
