mirror of https://github.com/hashicorp/consul
131 lines
3.1 KiB
Go
131 lines
3.1 KiB
Go
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// Copyright (c) HashiCorp, Inc.
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// SPDX-License-Identifier: BUSL-1.1
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package dns
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import (
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"context"
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"errors"
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"github.com/hashicorp/go-hclog"
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"github.com/miekg/dns"
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"github.com/stretchr/testify/mock"
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agentdns "github.com/hashicorp/consul/agent/dns"
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"github.com/hashicorp/consul/proto-public/pbdns"
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)
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func basicResponse() *dns.Msg {
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return &dns.Msg{
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MsgHdr: dns.MsgHdr{
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Opcode: dns.OpcodeQuery,
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Response: true,
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Authoritative: true,
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},
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Compress: true,
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Question: []dns.Question{
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{
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Name: "abc.com.",
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Qtype: dns.TypeANY,
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Qclass: dns.ClassINET,
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},
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},
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Extra: []dns.RR{
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&dns.TXT{
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Hdr: dns.RR_Header{
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Name: "abc.com.",
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Rrtype: dns.TypeTXT,
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Class: dns.ClassINET,
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Ttl: 0,
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},
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Txt: txtRR,
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},
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},
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}
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}
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func (s *DNSTestSuite) TestProxy_V2Success() {
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testCases := map[string]struct {
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question string
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configureRouter func(router *agentdns.MockDNSRouter)
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clientQuery func(qR *pbdns.QueryRequest)
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expectedErr error
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}{
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"happy path udp": {
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question: "abc.com.",
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configureRouter: func(router *agentdns.MockDNSRouter) {
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router.On("HandleRequest", mock.Anything, mock.Anything, mock.Anything).
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Return(basicResponse(), nil)
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},
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clientQuery: func(qR *pbdns.QueryRequest) {
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qR.Protocol = pbdns.Protocol_PROTOCOL_UDP
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},
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},
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"happy path tcp": {
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question: "abc.com.",
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configureRouter: func(router *agentdns.MockDNSRouter) {
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router.On("HandleRequest", mock.Anything, mock.Anything, mock.Anything).
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Return(basicResponse(), nil)
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},
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clientQuery: func(qR *pbdns.QueryRequest) {
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qR.Protocol = pbdns.Protocol_PROTOCOL_TCP
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},
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},
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"No protocol set": {
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question: "abc.com.",
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clientQuery: func(qR *pbdns.QueryRequest) {},
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expectedErr: errors.New("error protocol type not set: PROTOCOL_UNSET_UNSPECIFIED"),
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},
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"Invalid question": {
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question: "notvalid",
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clientQuery: func(qR *pbdns.QueryRequest) {
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qR.Protocol = pbdns.Protocol_PROTOCOL_UDP
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},
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expectedErr: errors.New("failure decoding dns request"),
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},
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}
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for name, tc := range testCases {
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s.Run(name, func() {
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router := agentdns.NewMockDNSRouter(s.T())
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if tc.configureRouter != nil {
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tc.configureRouter(router)
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}
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server := NewServerV2(ConfigV2{
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Logger: hclog.Default(),
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DNSRouter: router,
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TokenFunc: func() string { return "" },
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})
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client := testClient(s.T(), server)
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req := dns.Msg{}
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req.SetQuestion(tc.question, dns.TypeA)
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bytes, _ := req.Pack()
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clientReq := &pbdns.QueryRequest{Msg: bytes}
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tc.clientQuery(clientReq)
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clientResp, err := client.Query(context.Background(), clientReq)
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if tc.expectedErr != nil {
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s.Require().Error(err, "no errror calling gRPC endpoint")
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s.Require().ErrorContains(err, tc.expectedErr.Error())
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} else {
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s.Require().NoError(err, "error calling gRPC endpoint")
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resp := clientResp.GetMsg()
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var dnsResp dns.Msg
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err = dnsResp.Unpack(resp)
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s.Require().NoError(err, "error unpacking dns response")
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rr := dnsResp.Extra[0].(*dns.TXT)
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s.Require().EqualValues(rr.Txt, txtRR)
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}
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})
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}
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}
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