[Kea-users] Testing option 43
Kraishak Mahtha
kraishak.edu at gmail.com
Tue Jun 13 11:41:48 UTC 2023
Hi Darren,
Thank you for the suggestion but I am still facing the same problem.
{
"code": "43",
"csv-format": true,
"data": "74657374",
},
---> With the above format I am getting a few issues because of double
quotes for the code, and for CSV format, If I set that to true I am getting
an error as
2023-06-13 06:23:40.309 ERROR [kea-dhcp4.dhcp4/6561.139810011805888]
DHCP4_PARSER_FAIL failed to create or run parser for configuration element
subnet4: option data does not match option definition (space: dhcp4, code:
43): attempt to write invalid option data field type into the option
buffer: 0 (kea-dhcp4.conf:60:27)
Error encountered: option data does not match option definition (space:
dhcp4, code: 43): attempt to write invalid option data field type into the
option buffer: 0 (kea-dhcp4.conf:60:27)
The final trial is as follows:
{
"code": "43",
"csv-format": false,
"data": "74657374",
},
This also gave me an empty for option 43 in the ACK packet.
This is the subnet of the ISC config that I using for testing
subnet 3.4.0.0 netmask 255.255.0.0 {
pool {
range 3.4.0.2 3.4.0.5;
range 3.4.0.12 3.4.0.16;
range 3.4.0.41 3.4.0.56;
}
default-lease-time 86400;
max-lease-time 86400;
option domain-name "test.com";
option domain-name-servers 6.6.6.6,7.7.7.7,8.8.8.4;
option routers 3.4.0.1;
option subnet-mask 255.255.0.0;
option vendor-encapsulated-options "test";
}
Thanks
Kraishak
On Tue, Jun 13, 2023 at 12:35 AM Darren Ankney <darren.ankney at gmail.com>
wrote:
> Hi Kraishak,
>
> Have a look here:
>
> https://kea.readthedocs.io/en/kea-2.2.0/arm/dhcp4-srv.html?highlight=%22vendor-encapsulated-options%22#dhcpv4-vendor-specific-options
>
> You might need to setup encapsulated sub-options and tell Kea to
> include the "vendor-encapsulated-options-space" content in the options
> as a sub-option:
>
> "option-data": [
> {
> "name": "REPLACE_ME",
> "space": "vendor-encapsulated-options",
> "code": 1,
> "csv-format": false,
> "data": "74657374"
> },
> {
> "name": "vendor-encapsulated-options"
> }
> ]
>
> So, above, first the data is added as a sub-option of option 43
> (option 43 typically consists of one or more sub-options). Replace
> "REPLACE_ME" with the name of the sub-option you are trying to send (I
> think you can omit name entirely if there is none as that part isn't
> sent). Set the code to the correct sub-option number. If this
> particular data should not be a sub-option, then you might have to do
> something like this:
>
> {
> "code": "43",
> "csv-format": true,
> "data": "74657374",
> },
>
> please note that if "csv-format" is set to false, then Kea will be
> expecting "a hexadecimal string." see:
>
> https://kea.readthedocs.io/en/kea-2.2.0/arm/dhcp4-srv.html?highlight=%22csv-format%22#standard-dhcpv4-options
>
> Can you share the option 43 portion of the ISC DHCP configuration you
> are trying to convert if you still have trouble?
>
> Thank you,
>
> Darren Ankney
>
> On Mon, Jun 12, 2023 at 1:59 PM Kraishak Mahtha <kraishak.edu at gmail.com>
> wrote:
> >
> > Hi,
> > I am trying to convert my ISC config to kea-equivalent and testing the
> changes as part of the testing, I am stuck at testing option 43 ,
> > Using the keama tool I convert my ISC config to Kea equivalent config
> and tested the leases but in the DHCP ACK packet I cannot see option 43
> coming when I operate with Kea
> >
> > sample code config for option 43 that I used in my testing subnet
> > {
> > "data": "74657374",
> > "name": "vendor-encapsulated-options",
> > "csv-format": false
> > },
> >
> > But in log and tcpdump I see the empty value for option 43
> >
> > Log:
> > ===
> > 2023-06-12 15:10:26.284 DEBUG [kea-dhcp4.packets/30590.140464453838592]
> DHCP4_RESPONSE_DATA [hwtype=1 21:21:2f:00:00:01],
> cid=[01:21:21:2f:00:00:01]x8259145: responding with packet DHCPACK (type
> 5), packet details: local_address=192.168.0.125:67, remote_address=
> 4.0.0.1:67, msg_type=DHCPACK (5), =0x8259145,
> > options:
> > type=001, len=004: 4294901760 (uint32)
> > type=003, len=004: 4.0.0.1
> > type=006, len=012: 6.6.6.6 7.7.7.7 8.8.8.4
> > type=012, len=018: "dhcp-client-000001" (string)
> > type=015, len=011: "test.com" (string)
> > type=043, len=000: ----->Empty Value, and I cross-verified the
> tcpdump too.
> > type=051, len=004: 86400 (uint32)
> > type=053, len=001: 5 (uint8)
> > type=054, len=004: 192.168.0.125
> > type=061, len=007: 01:21:21:2f:00:00:01
> >
> > I have checked the discover packet option 55 just to make sure if my
> packet is asking for option 43 or not, and yes I can see option 43 in the
> option 55 parameter value.
> >
> > I am not sure what is wrong I am doing, Can someone who has familiar can
> guide me
> >
> > Thanks in Advance
> > Kraishak
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