I hope someone can help me with this issue. I am using Kea 2.4
I am trying to get option-18 to match a DHCPv6 static reservation, but Kea is
evaluating the option to "" and no address is being allocated. We have
purchased the premium hooks package. I have got the same result on two
different servers in the lab but can't work out what I am doing wrong.
Here is the configuration in use:
{
"Dhcp6": {
"server-tag": "kea-01",
"config-control": {
"config-databases": [{
"type": "postgresql",
"name": "retaildhcp",
"user": "vorboss",
"password": "vorboss",
"host": "127.0.0.1",
"port": 5432
}],
"config-fetch-wait-time": 20
},
"hooks-libraries": [
{
"library": "/usr/lib/x86_64-linux-gnu/kea/hooks/libdhcp_flex_id.so",
"parameters": {
"identifier-expression":
"substring(relay6[0].option[18].hex,0,all)"
}
},
{
"library":
"/usr/lib/x86_64-linux-gnu/kea/hooks/libdhcp_pgsql_cb.so"
}
],
"host-reservation-identifiers": ["flex-id", "duid"],
"interfaces-config": {
"interfaces": [ "eth1/2a00:e340:1100::32"]
},
"control-socket": {
"socket-type": "unix",
"socket-name": "/tmp/kea6-ctrl-socket"
},
"lease-database": {
# "type": "memfile",
"lfc-interval": 3600,
"type" : "postgresql",
"name": "retaildhcp" ,
"host": "127.0.0.1" ,
"connect-timeout" : 5,
"user": "vorboss",
"password": "testingonly",
},
"hosts-database": {
"type": "postgresql",
"name": "retaildhcp",
"user": "vorboss",
"password": "testingonly",
"host": "localhost",
"port": 5432
},
"expired-leases-processing": {
"reclaim-timer-wait-time": 10,
"flush-reclaimed-timer-wait-time": 25,
"hold-reclaimed-time": 3600,
"max-reclaim-leases": 100,
"max-reclaim-time": 250,
"unwarned-reclaim-cycles": 5
},
"renew-timer": 1000,
"rebind-timer": 2000,
"preferred-lifetime": 3000,
"valid-lifetime": 4000,
"reservations-global": false,
"reservations-in-subnet": true,
"subnet6": [
{
"subnet": "2a00:e300:1102::/64",
"option-data": [
{
"name": "dns-servers",
"data": "2001:db8:2::dead:beef, 2001:db8:2::cafe:babe"
}
],
"reservations": [
{
"flex-id": "'vlan-100'",
"ip-addresses": [ "2a00:e300:1102::2" ],
"option-data": [
{
"name": "dns-servers",
"data": "3000:1::234"
}
]
},
{
"flex-id": "'xe-0/0/1:rsw001'",
"ip-addresses": [ "2a00:e300:1102::3" ]
},
{
"flex-id": "'xe-0/0/2:rsw001'",
"ip-addresses": [ "2a00:e300:1102::4" ]
}
]
}
],
"loggers": [
{
"name": "kea-dhcp6",
"output_options": [
{
"output": "/var/log/dhcp6",
"pattern": "%-5p %m\n",
}
],
"severity": "DEBUG",
"debuglevel": 99
}
]
}
}
I have tried setting flex-id to a double/single quoted string and also to a
double-quoted hex value but no luck. If you look at the debug below, you can
see the hex value coming in as a type 18. If you take that value and put it
into a hex to ascii converter, you get the port number and switch name back
successfully. But kea thinks option 18 has a value of 0x.
Here is the debug:
DEBUG DHCP6_BUFFER_RECEIVED received buffer from 2a00:e340:1100::31:547 to
2a00:e340:1100::32:0 over interface eth1
DEBUG DHCP6_BUFFER_UNPACK parsing buffer received from 2a00:e340:1100::31 to
2a00:e340:1100::32 over interface eth1
DEBUG DHCP6_PACKET_RECEIVED duid=[00:03:00:01:4c:6d:58:7d:33:77], tid=0xe8d2ae:
REQUEST (type 3) received from 2a00:e340:1100::31 to 2a00:e340:1100::32 on
interface eth1
DEBUG DHCP6_QUERY_DATA duid=[00:03:00:01:4c:6d:58:7d:33:77], tid=0xe8d2ae,
packet details: localAddr=[2a00:e340:1100::32]:0
remoteAddr=[2a00:e340:1100::31]:547
msgtype=3(REQUEST), transid=0xe8d2ae
type=00001, len=00010: 00:03:00:01:4c:6d:58:7d:33:77
type=00002, len=00014: 00:01:00:01:2c:03:74:26:00:15:5d:2b:85:0c
type=00003(IA_NA), len=00012: iaid=0, t1=4294967295, t2=4294967295
type=00006, len=00008: 17(uint16) 59(uint16) 60(uint16) 56(uint16)
type=00018, len=00015: 78:65:2d:30:2f:30:2f:31:3a:72:73:77:30:30:31
1 relay(s):
relay[0]: msg-type=12(RELAY_FORWARD), hop-count=0,
link-address=2a00:e340:1102::, peer-address=fe80::4e6d:5800:327d:f777, 1
option(s)
type=00037, len=00014: 6527 (uint32) 000300014C6D587D3377 (binary)
DEBUG HOOKS_CALLOUTS_BEGIN begin all callouts for hook pkt6_receive
DEBUG HOOKS_CALLOUT_CALLED hooks library with index 1 has called a callout on
hook pkt6_receive that has address 0x7f85f1572380 (callout duration: 0.006 ms)
DEBUG HOOKS_CALLOUTS_COMPLETE completed callouts for hook pkt6_receive (total
callouts duration: 0.006 ms)
DEBUG DHCPSRV_CFGMGR_SUBNET6 retrieved subnet 2a00:e340:1102::/64 for address
hint 2a00:e340:1102::
DEBUG DHCP6_SUBNET_SELECTED duid=[00:03:00:01:4c:6d:58:7d:33:77], tid=0xe8d2ae:
the subnet with ID 1 was selected for client assignments
DEBUG DHCP6_SUBNET_DATA duid=[00:03:00:01:4c:6d:58:7d:33:77], tid=0xe8d2ae: the
selected subnet details: 2a00:e340:1102::/64
DEBUG HOOKS_CALLOUTS_BEGIN begin all callouts for hook host6_identifier
DEBUG EVAL_DEBUG_OPTION Pushing option 18 with value 0x
DEBUG EVAL_DEBUG_STRING Pushing text string '0'
DEBUG EVAL_DEBUG_STRING Pushing text string 'all'
DEBUG EVAL_DEBUG_SUBSTRING_EMPTY Popping length all, start 0, string 0x pushing
result 0x
DEBUG FLEX_ID_EXPRESSION_EVALUATED Expression evaluated for packet to "" (size:
0)
DEBUG HOOKS_CALLOUT_CALLED hooks library with index 1 has called a callout on
hook host6_identifier that has address 0x7f85f15719c0 (callout duration: 0.038
ms)
DEBUG HOOKS_CALLOUTS_COMPLETE completed callouts for hook host6_identifier
(total callouts duration: 0.038 ms)
DEBUG HOSTS_CFG_GET_ONE_SUBNET_ID_IDENTIFIER get one host with IPv6 reservation
for subnet id 1, identified by duid=000300014C6D587D3377
DEBUG HOSTS_CFG_GET_ALL_IDENTIFIER get all hosts with reservations using
identifier: duid=000300014C6D587D3377
DEBUG HOSTS_CFG_GET_ALL_IDENTIFIER_COUNT using identifier
duid=000300014C6D587D3377, found 0 host(s)
DEBUG HOSTS_CFG_GET_ONE_SUBNET_ID_IDENTIFIER_NULL host not found using subnet
id 1 and identifier duid=000300014C6D587D3377
DEBUG HOSTS_MGR_ALTERNATE_GET6_SUBNET_ID_IDENTIFIER get one host with IPv6
reservation for subnet id 1, identified by duid=000300014C6D587D3377
DEBUG HOSTS_MGR_ALTERNATE_GET6_SUBNET_ID_IDENTIFIER_NULL host not found using
subnet id 1 and identifier duid=000300014C6D587D3377
DEBUG DHCP6_CLASS_ASSIGNED duid=[00:03:00:01:4c:6d:58:7d:33:77], tid=0xe8d2ae:
client packet has been assigned to the following class(es): UNKNOWN
DEBUG DHCP6_CLASS_ASSIGNED duid=[00:03:00:01:4c:6d:58:7d:33:77], tid=0xe8d2ae:
client packet has been assigned to the following class(es): ALL, UNKNOWN
DEBUG DHCP6_PROCESS_IA_NA_REQUEST duid=[00:03:00:01:4c:6d:58:7d:33:77],
tid=0xe8d2ae: server is processing IA_NA option with iaid=0 and hint=(no hint)
DEBUG DHCPSRV_PGSQL_GET_IAID_DUID obtaining IPv4 leases for IAID 0 and DUID
00:03:00:01:4c:6d:58:7d:33:77, lease type 0
DEBUG ALLOC_ENGINE_V6_ALLOC_UNRESERVED no static reservations available -
trying to dynamically allocate leases for client
duid=[00:03:00:01:4c:6d:58:7d:33:77], tid=0xe8d2ae
WARN ALLOC_ENGINE_V6_ALLOC_FAIL_SUBNET duid=[00:03:00:01:4c:6d:58:7d:33:77],
tid=0xe8d2ae: failed to allocate an IPv6 lease in the subnet
2a00:e340:1102::/64, subnet-id 1, shared network (none)
WARN ALLOC_ENGINE_V6_ALLOC_FAIL_NO_POOLS duid=[00:03:00:01:4c:6d:58:7d:33:77],
tid=0xe8d2ae: no pools were available for the lease allocation
WARN ALLOC_ENGINE_V6_ALLOC_FAIL_CLASSES duid=[00:03:00:01:4c:6d:58:7d:33:77],
tid=0xe8d2ae: Failed to allocate an IPv6 address for client with classes: ALL,
UNKNOWN
DEBUG DHCP6_LEASE_ALLOC_FAIL duid=[00:03:00:01:4c:6d:58:7d:33:77],
tid=0xe8d2ae: failed to grant an address lease for iaid=0
DEBUG DHCP6_ADD_STATUS_CODE_FOR_IA duid=[00:03:00:01:4c:6d:58:7d:33:77],
tid=0xe8d2ae: adding Status Code to IA with iaid=0: NoAddrsAvail(2) "Sorry, no
address could be allocated."
DEBUG HOOKS_CALLOUTS_BEGIN begin all callouts for hook pkt6_send
DEBUG HOOKS_CALLOUT_CALLED hooks library with index 1 has called a callout on
hook pkt6_send that has address 0x7f85f156fbe0 (callout duration: 0.006 ms)
DEBUG HOOKS_CALLOUTS_COMPLETE completed callouts for hook pkt6_send (total
callouts duration: 0.006 ms)
DEBUG DHCP6_PACKET_SEND duid=[00:03:00:01:4c:6d:58:7d:33:77], tid=0xe8d2ae:
trying to send packet REPLY (type 7) from [2a00:e340:1100::32]:547 to
[2a00:e340:1100::31]:547 on interface eth1
DEBUG DHCP6_RESPONSE_DATA responding with packet type 7 data is
localAddr=[2a00:e340:1100::32]:547 remoteAddr=[2a00:e340:1100::31]:547
msgtype=7(REPLY), transid=0xe8d2ae
type=00001, len=00010: 00:03:00:01:4c:6d:58:7d:33:77
type=00002, len=00014: 00:01:00:01:2c:03:74:26:00:15:5d:2b:85:0c
type=00003(IA_NA), len=00055: iaid=0, t1=0, t2=0,
options:
type=00013, len=00039: NoAddrsAvail(2) "Sorry, no address could be allocated."
1 relay(s):
relay[0]: msg-type=13(RELAY_REPLY), hop-count=0,
link-address=2a00:e340:1102::, peer-address=fe80::4e6d:5800:327d:f777, 0
option(s)
Any help appreciated!
Kind regards,
Andy
Andrew Mulheirn
Senior Network Architect
M: +44 (0) 74 3654 8126 <tel:+44%20(0)%2074%203654%208126>
E: [email protected] <mailto:[email protected]>
vorboss.com <https://vorboss.com>
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