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I am having issues logging remote-id in IPv6. I can see in the packet capture that option 37 does have the proper information.
However when I attempt to log it I get blank string and the lines after it don't process either.
Here is what I have
log(info,
concat("IP Address: ",
binary-to-ascii(16, 16, ":", suffix(option dhcp6.ia-pd, 16)),
"/",
binary-to-ascii(10, 8, ":", substring(suffix(option dhcp6.ia-pd, 17), 0, 1)),
" | Subscriber:",
v6relay(1, option dhcp6.remote-id),
" | MacID: ",
binary-to-ascii(16, 8, ":", suffix(option dhcp6.client-id, 6))
)
);
Here is the log result:
IP Address: 2604:b400:1e59:b400:0:0:0:0/56 | Subscriber:
If I take out the subscriber section:
log(info,
concat("IP Address: ",
binary-to-ascii(16, 16, ":", suffix(option dhcp6.ia-pd, 16)),
"/",
binary-to-ascii(10, 8, ":", substring(suffix(option dhcp6.ia-pd, 17), 0, 1)),
" | MacID: ",
binary-to-ascii(16, 8, ":", suffix(option dhcp6.client-id, 6))
)
);
Here is the log result:
IP Address: 2604:b400:1e92:6700:0:0:0:0/56 | MacID: 0:23:6a:9:8e:2e
We have the same logging format working with IPv4 and option82 not sure why I can't log option 37 in v6
Thank you in advance for any help you can provide.
_______________________________________________
dhcp-users mailing list
[hidden email]
https://lists.isc.org/mailman/listinfo/dhcp-users
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My understanding (and personal experience) is that, in the case of remote-id, dhcp doesn't attempt to decode it (RFC says not to), or does decode it and its binary (which won't log and will break the log line).
When I log, I log the option 18 / option 37 / ip-mac-lease details on separate lines in case of this type of thing. Binary values will break log lines.
You can probably decode the remote-id also if you can figure the proper parameters for binary-to-ascii() for that particular option (assuming the incoming value is binary encoded instead of ASCII).
Is remote-id supposed to be a mac address in your case? If so, something like this may work:
binary-to-ascii(16,8,":",v6relay(1,option dhcp6.remote-id))
----- Original Message -----
> From: "Nicholas Thompson" < [hidden email]>
> To: "Users of ISC DHCP" < [hidden email]>
> Sent: Wednesday, November 7, 2018 7:40:29 AM
> Subject: IPv6 log remote-id
> I am having issues logging remote-id in IPv6. I can see in the packet capture
> that option 37 does have the proper information.
> However when I attempt to log it I get blank string and the lines after it don't
> process either.
> Here is what I have
> log(info,
> concat("IP Address: ",
> binary-to-ascii(16, 16, ":", suffix(option dhcp6.ia-pd, 16)),
> "/",
> binary-to-ascii(10, 8, ":", substring(suffix(option dhcp6.ia-pd, 17), 0, 1)),
> " | Subscriber:",
> v6relay(1, option dhcp6.remote-id),
> " | MacID: ",
> binary-to-ascii(16, 8, ":", suffix(option dhcp6.client-id, 6))
> )
> );
> Here is the log result:
> IP Address: 2604:b400:1e59:b400:0:0:0:0/56 | Subscriber:
> If I take out the subscriber section:
> log(info,
> concat("IP Address: ",
> binary-to-ascii(16, 16, ":", suffix(option dhcp6.ia-pd, 16)),
> "/",
> binary-to-ascii(10, 8, ":", substring(suffix(option dhcp6.ia-pd, 17), 0, 1)),
> " | MacID: ",
> binary-to-ascii(16, 8, ":", suffix(option dhcp6.client-id, 6))
> )
> );
> Here is the log result:
> IP Address: 2604:b400:1e92:6700:0:0:0:0/56 | MacID: 0:23:6a:9:8e:2e
> We have the same logging format working with IPv4 and option82 not sure why I
> can't log option 37 in v6
> Thank you in advance for any help you can provide.
> _______________________________________________
> dhcp-users mailing list
> [hidden email]
> https://lists.isc.org/mailman/listinfo/dhcp-users_______________________________________________
dhcp-users mailing list
[hidden email]
https://lists.isc.org/mailman/listinfo/dhcp-users
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Thanks you for getting me looking in the right direction again, we did not have to do binary-to-ascii. What I did have to do it get just the last 10 bytes that are the string the first 4 are the enterprise id and is in binary. That was not the case in v4
Here is what I have now:
log(info, (concat("Customer: ", suffix(v6relay(1, option dhcp6.remote-id), 10),
" | IP Address: ", binary-to-ascii(16, 16, ":", suffix(option dhcp6.ia-pd, 16)),
"/", binary-to-ascii(10, 8, ":", substring(suffix(option dhcp6.ia-pd, 17), 0, 1)),
" | MacID: ", binary-to-ascii(16, 8, ":", suffix(option dhcp6.client-id, 6)),
" | Interface ID ",
v6relay(1, option dhcp6.interface-id)
)));
And it outputs a log like
Customer: 10001XXXXX | IP Address: 2604:b400:1e25:3d00:0:0:0:0/56 | MacID: 0:23:6a:e:e2:bd | Interface ID JK-1 eth 3/1/5
-----Original Message-----
From: Nicholas Thompson
Sent: Wednesday, November 07, 2018 7:40 AM
To: ' [hidden email]' < [hidden email]>
Subject: IPv6 log remote-id
I am having issues logging remote-id in IPv6. I can see in the packet capture that option 37 does have the proper information.
However when I attempt to log it I get blank string and the lines after it don't process either.
Here is what I have
log(info,
concat("IP Address: ",
binary-to-ascii(16, 16, ":", suffix(option dhcp6.ia-pd, 16)),
"/",
binary-to-ascii(10, 8, ":", substring(suffix(option dhcp6.ia-pd, 17), 0, 1)),
" | Subscriber:",
v6relay(1, option dhcp6.remote-id),
" | MacID: ",
binary-to-ascii(16, 8, ":", suffix(option dhcp6.client-id, 6))
)
);
Here is the log result:
IP Address: 2604:b400:1e59:b400:0:0:0:0/56 | Subscriber:
If I take out the subscriber section:
log(info,
concat("IP Address: ",
binary-to-ascii(16, 16, ":", suffix(option dhcp6.ia-pd, 16)),
"/",
binary-to-ascii(10, 8, ":", substring(suffix(option dhcp6.ia-pd, 17), 0, 1)),
" | MacID: ",
binary-to-ascii(16, 8, ":", suffix(option dhcp6.client-id, 6))
)
);
Here is the log result:
IP Address: 2604:b400:1e92:6700:0:0:0:0/56 | MacID: 0:23:6a:9:8e:2e
We have the same logging format working with IPv4 and option82 not sure why I can't log option 37 in v6
Thank you in advance for any help you can provide.
_______________________________________________
dhcp-users mailing list
[hidden email]
https://lists.isc.org/mailman/listinfo/dhcp-users
|
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