Mirrors/coredns
1
0
Fork 0
mirror of https://github.com/coredns/coredns.git synced 2025-10-27 16:24:19 -04:00
Code Issues Packages Projects Releases Wiki Activity

plugin/nsid: Small doc cleanup (#1293)

Browse Source 
add an example and some typos fixed.
This commit is contained in:
Miek Gieben
2017-12-09 09:37:02 +00:00
committed by GitHub
parent 850a024905
commit cf5418a015
2 changed files with 22 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

25
plugin/nsid/README.md
View File

@@ -1,9 +1,9 @@
# nsid # nsid
*nsid* add an identifier of this server to each reply. *nsid* adds an identifier of this server to each reply.
This plugin implements RFC 5001 and adds an EDNS0 OPT resource record to replies that uniquely This plugin implements RFC 5001 and adds an EDNS0 OPT resource record to replies that uniquely
identifies the server. This can be useful in anycast setups to see which server was responsible for identify the server. This is useful in anycast setups to see which server was responsible for
generating the reply and for debugging. generating the reply and for debugging.
## Syntax ## Syntax
@@ -22,6 +22,25 @@ Enable nsid:
~~~ corefile ~~~ corefile
. { . {
nsid whoami
nsid Use The Force
} }
~~~ ~~~
And now a client with NSID support will see an OPT record with the NSID option:
~~~ sh
% dig +nsid @localhost a whoami.example.org
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 46880
;; flags: qr aa rd; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 3
....
; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
; NSID: 55 73 65 20 54 68 65 20 46 6f 72 63 65 ("Use The Force")
;; QUESTION SECTION:
;whoami.example.org. IN A
~~~

1
plugin/nsid/nsid.go
View File

@@ -29,7 +29,6 @@ func (n Nsid) ServeDNS(ctx context.Context, w dns.ResponseWriter, r *dns.Msg) (i
if _, ok := o.(*dns.EDNS0_NSID); ok { if _, ok := o.(*dns.EDNS0_NSID); ok {
nw := &ResponseWriter{ResponseWriter: w, Data: n.Data} nw := &ResponseWriter{ResponseWriter: w, Data: n.Data}
return plugin.NextOrFailure(n.Name(), n.Next, ctx, nw, r) return plugin.NextOrFailure(n.Name(), n.Next, ctx, nw, r)
} }
} }
} }