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Add NSID plugin support for CoreDNS (#1273)

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* Add NSID plugin support for CoreDNS

This fix adds NSID plugin support for CoreDNS, as was proposed
in 1256.

Signed-off-by: Yong Tang <yong.tang.github@outlook.com>

* Add test cases for NSID plugin

Signed-off-by: Yong Tang <yong.tang.github@outlook.com>

* Generate code for NSID plugin

Signed-off-by: Yong Tang <yong.tang.github@outlook.com>

* Use hostname as the default (as with bind), and remove unneeded copy

Signed-off-by: Yong Tang <yong.tang.github@outlook.com>

* Add README.md

Signed-off-by: Yong Tang <yong.tang.github@outlook.com>
This commit is contained in:
Yong Tang
2017-12-04 08:28:27 -08:00
committed by GitHub
parent a04eeb9c73
commit b52c3418b2
8 changed files with 263 additions and 0 deletions
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73
plugin/nsid/nsid_test.go Normal file
View File

@@ -0,0 +1,73 @@
package nsid
import (
"encoding/hex"
"testing"
"github.com/coredns/coredns/plugin"
"github.com/coredns/coredns/plugin/pkg/dnstest"
"github.com/coredns/coredns/plugin/test"
"github.com/coredns/coredns/plugin/whoami"
"github.com/miekg/dns"
"golang.org/x/net/context"
)
func TestNsid(t *testing.T) {
em := Nsid{
Data: "NSID",
}
tests := []struct {
next plugin.Handler
qname string
qtype uint16
expectedCode int
expectedReply string
expectedErr error
}{
{
next: whoami.Whoami{},
qname: ".",
expectedCode: dns.RcodeSuccess,
expectedReply: hex.EncodeToString([]byte("NSID")),
expectedErr: nil,
},
}
ctx := context.TODO()
for i, tc := range tests {
req := new(dns.Msg)
if tc.qtype == 0 {
tc.qtype = dns.TypeA
}
req.SetQuestion(dns.Fqdn(tc.qname), tc.qtype)
req.Question[0].Qclass = dns.ClassINET
req.SetEdns0(4096, false)
option := req.Extra[0].(*dns.OPT)
option.Option = append(option.Option, &dns.EDNS0_NSID{Code: dns.EDNS0NSID, Nsid: ""})
em.Next = tc.next
rec := dnstest.NewRecorder(&test.ResponseWriter{})
code, err := em.ServeDNS(ctx, rec, req)
if err != tc.expectedErr {
t.Errorf("Test %d: Expected error %v, but got %v", i, tc.expectedErr, err)
}
if code != int(tc.expectedCode) {
t.Errorf("Test %d: Expected status code %d, but got %d", i, tc.expectedCode, code)
}
if tc.expectedReply != "" {
for _, extra := range rec.Msg.Extra {
if option, ok := extra.(*dns.OPT); ok {
e := option.Option[0].(*dns.EDNS0_NSID)
if e.Nsid != tc.expectedReply {
t.Errorf("Test %d: Expected answer %s, but got %s", i, tc.expectedReply, e.Nsid)
}
}
}
}
}
}