mirror of https://github.com/hashicorp/consul
132 lines
3.0 KiB
Go
132 lines
3.0 KiB
Go
// Copyright (c) HashiCorp, Inc.
|
|
// SPDX-License-Identifier: BUSL-1.1
|
|
|
|
package dns
|
|
|
|
import (
|
|
"context"
|
|
"errors"
|
|
"net"
|
|
"testing"
|
|
|
|
"github.com/hashicorp/go-hclog"
|
|
"github.com/miekg/dns"
|
|
"github.com/stretchr/testify/require"
|
|
"github.com/stretchr/testify/suite"
|
|
"google.golang.org/grpc"
|
|
|
|
"github.com/hashicorp/consul/agent/grpc-external/testutils"
|
|
"github.com/hashicorp/consul/proto-public/pbdns"
|
|
)
|
|
|
|
var txtRR = []string{"Hello world"}
|
|
|
|
func helloServer(w dns.ResponseWriter, req *dns.Msg) {
|
|
m := new(dns.Msg)
|
|
m.SetReply(req)
|
|
|
|
m.Extra = make([]dns.RR, 1)
|
|
m.Extra[0] = &dns.TXT{
|
|
Hdr: dns.RR_Header{Name: m.Question[0].Name, Rrtype: dns.TypeTXT, Class: dns.ClassINET, Ttl: 0},
|
|
Txt: txtRR,
|
|
}
|
|
w.WriteMsg(m)
|
|
}
|
|
|
|
func testClient(t *testing.T, server testutils.GRPCService) pbdns.DNSServiceClient {
|
|
t.Helper()
|
|
|
|
addr := testutils.RunTestServer(t, server)
|
|
|
|
//nolint:staticcheck
|
|
conn, err := grpc.DialContext(context.Background(), addr.String(), grpc.WithInsecure())
|
|
require.NoError(t, err)
|
|
t.Cleanup(func() {
|
|
require.NoError(t, conn.Close())
|
|
})
|
|
|
|
return pbdns.NewDNSServiceClient(conn)
|
|
}
|
|
|
|
type DNSTestSuite struct {
|
|
suite.Suite
|
|
}
|
|
|
|
func TestDNS_suite(t *testing.T) {
|
|
suite.Run(t, new(DNSTestSuite))
|
|
}
|
|
|
|
func (s *DNSTestSuite) TestProxy_Success() {
|
|
mux := dns.NewServeMux()
|
|
mux.Handle(".", dns.HandlerFunc(helloServer))
|
|
server := NewServer(Config{
|
|
Logger: hclog.Default(),
|
|
DNSServeMux: mux,
|
|
LocalAddr: LocalAddr{
|
|
net.IPv4(127, 0, 0, 1),
|
|
0,
|
|
},
|
|
})
|
|
|
|
client := testClient(s.T(), server)
|
|
|
|
testCases := map[string]struct {
|
|
question string
|
|
clientQuery func(qR *pbdns.QueryRequest)
|
|
expectedErr error
|
|
}{
|
|
|
|
"happy path udp": {
|
|
question: "abc.com.",
|
|
clientQuery: func(qR *pbdns.QueryRequest) {
|
|
qR.Protocol = pbdns.Protocol_PROTOCOL_UDP
|
|
},
|
|
},
|
|
"happy path tcp": {
|
|
question: "abc.com.",
|
|
clientQuery: func(qR *pbdns.QueryRequest) {
|
|
qR.Protocol = pbdns.Protocol_PROTOCOL_TCP
|
|
},
|
|
},
|
|
"No protocol set": {
|
|
question: "abc.com.",
|
|
clientQuery: func(qR *pbdns.QueryRequest) {},
|
|
expectedErr: errors.New("error protocol type not set: PROTOCOL_UNSET_UNSPECIFIED"),
|
|
},
|
|
"Invalid question": {
|
|
question: "notvalid",
|
|
clientQuery: func(qR *pbdns.QueryRequest) {
|
|
qR.Protocol = pbdns.Protocol_PROTOCOL_UDP
|
|
},
|
|
expectedErr: errors.New("failure decoding dns request"),
|
|
},
|
|
}
|
|
|
|
for name, tc := range testCases {
|
|
s.Run(name, func() {
|
|
req := dns.Msg{}
|
|
req.SetQuestion(tc.question, dns.TypeA)
|
|
|
|
bytes, _ := req.Pack()
|
|
|
|
clientReq := &pbdns.QueryRequest{Msg: bytes}
|
|
tc.clientQuery(clientReq)
|
|
clientResp, err := client.Query(context.Background(), clientReq)
|
|
if tc.expectedErr != nil {
|
|
s.Require().Error(err, "no errror calling gRPC endpoint")
|
|
s.Require().ErrorContains(err, tc.expectedErr.Error())
|
|
} else {
|
|
s.Require().NoError(err, "error calling gRPC endpoint")
|
|
|
|
resp := clientResp.GetMsg()
|
|
var dnsResp dns.Msg
|
|
|
|
err = dnsResp.Unpack(resp)
|
|
s.Require().NoError(err, "error unpacking dns response")
|
|
rr := dnsResp.Extra[0].(*dns.TXT)
|
|
s.Require().EqualValues(rr.Txt, txtRR)
|
|
}
|
|
})
|
|
}
|
|
}
|