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consul/agent/dns/router_addr_test.go

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// Copyright (c) HashiCorp, Inc.
// SPDX-License-Identifier: BUSL-1.1
package dns
import (
"net"
"testing"
"time"
"github.com/miekg/dns"
)
func Test_HandleRequest_ADDR(t *testing.T) {
testCases := []HandleTestCase{
{
name: "test A 'addr.' query, ipv4 response",
request: &dns.Msg{
MsgHdr: dns.MsgHdr{
Opcode: dns.OpcodeQuery,
},
Question: []dns.Question{
{
Name: "c000020a.addr.dc1.consul", // "intentionally missing the trailing dot"
Qtype: dns.TypeA,
Qclass: dns.ClassINET,
},
},
},
response: &dns.Msg{
MsgHdr: dns.MsgHdr{
Opcode: dns.OpcodeQuery,
Response: true,
Authoritative: true,
},
Compress: true,
Question: []dns.Question{
{
Name: "c000020a.addr.dc1.consul.",
Qtype: dns.TypeA,
Qclass: dns.ClassINET,
},
},
Answer: []dns.RR{
&dns.A{
Hdr: dns.RR_Header{
Name: "c000020a.addr.dc1.consul.",
Rrtype: dns.TypeA,
Class: dns.ClassINET,
Ttl: 123,
},
A: net.ParseIP("192.0.2.10"),
},
},
},
},
{
name: "test AAAA 'addr.' query, ipv4 response",
// Since we asked for an AAAA record, the A record that resolves from the address is attached as an extra
request: &dns.Msg{
MsgHdr: dns.MsgHdr{
Opcode: dns.OpcodeQuery,
},
Question: []dns.Question{
{
Name: "c000020a.addr.dc1.consul",
Qtype: dns.TypeAAAA,
Qclass: dns.ClassINET,
},
},
},
response: &dns.Msg{
MsgHdr: dns.MsgHdr{
Opcode: dns.OpcodeQuery,
Response: true,
Authoritative: true,
},
Compress: true,
Question: []dns.Question{
{
Name: "c000020a.addr.dc1.consul.",
Qtype: dns.TypeAAAA,
Qclass: dns.ClassINET,
},
},
Extra: []dns.RR{
&dns.A{
Hdr: dns.RR_Header{
Name: "c000020a.addr.dc1.consul.",
Rrtype: dns.TypeA,
Class: dns.ClassINET,
Ttl: 123,
},
A: net.ParseIP("192.0.2.10"),
},
},
},
},
{
name: "test SRV 'addr.' query, ipv4 response",
// Since we asked for a SRV record, the A record that resolves from the address is attached as an extra
request: &dns.Msg{
MsgHdr: dns.MsgHdr{
Opcode: dns.OpcodeQuery,
},
Question: []dns.Question{
{
Name: "c000020a.addr.dc1.consul",
Qtype: dns.TypeSRV,
Qclass: dns.ClassINET,
},
},
},
response: &dns.Msg{
MsgHdr: dns.MsgHdr{
Opcode: dns.OpcodeQuery,
Response: true,
Authoritative: true,
},
Compress: true,
Question: []dns.Question{
{
Name: "c000020a.addr.dc1.consul.",
Qtype: dns.TypeSRV,
Qclass: dns.ClassINET,
},
},
Extra: []dns.RR{
&dns.A{
Hdr: dns.RR_Header{
Name: "c000020a.addr.dc1.consul.",
Rrtype: dns.TypeA,
Class: dns.ClassINET,
Ttl: 123,
},
A: net.ParseIP("192.0.2.10"),
},
},
},
},
{
name: "test ANY 'addr.' query, ipv4 response",
// The response to ANY should look the same as the A response
request: &dns.Msg{
MsgHdr: dns.MsgHdr{
Opcode: dns.OpcodeQuery,
},
Question: []dns.Question{
{
Name: "c000020a.addr.dc1.consul",
Qtype: dns.TypeANY,
Qclass: dns.ClassINET,
},
},
},
response: &dns.Msg{
MsgHdr: dns.MsgHdr{
Opcode: dns.OpcodeQuery,
Response: true,
Authoritative: true,
},
Compress: true,
Question: []dns.Question{
{
Name: "c000020a.addr.dc1.consul.",
Qtype: dns.TypeANY,
Qclass: dns.ClassINET,
},
},
Answer: []dns.RR{
&dns.A{
Hdr: dns.RR_Header{
Name: "c000020a.addr.dc1.consul.",
Rrtype: dns.TypeA,
Class: dns.ClassINET,
Ttl: 123,
},
A: net.ParseIP("192.0.2.10"),
},
},
},
},
{
name: "test AAAA 'addr.' query, ipv6 response",
request: &dns.Msg{
MsgHdr: dns.MsgHdr{
Opcode: dns.OpcodeQuery,
},
Question: []dns.Question{
{
Name: "20010db800010002cafe000000001337.addr.dc1.consul",
Qtype: dns.TypeAAAA,
Qclass: dns.ClassINET,
},
},
},
response: &dns.Msg{
MsgHdr: dns.MsgHdr{
Opcode: dns.OpcodeQuery,
Response: true,
Authoritative: true,
},
Compress: true,
Question: []dns.Question{
{
Name: "20010db800010002cafe000000001337.addr.dc1.consul.",
Qtype: dns.TypeAAAA,
Qclass: dns.ClassINET,
},
},
Answer: []dns.RR{
&dns.AAAA{
Hdr: dns.RR_Header{
Name: "20010db800010002cafe000000001337.addr.dc1.consul.",
Rrtype: dns.TypeAAAA,
Class: dns.ClassINET,
Ttl: 123,
},
AAAA: net.ParseIP("2001:db8:1:2:cafe::1337"),
},
},
},
},
{
name: "test A 'addr.' query, ipv6 response",
// Since we asked for an A record, the AAAA record that resolves from the address is attached as an extra
request: &dns.Msg{
MsgHdr: dns.MsgHdr{
Opcode: dns.OpcodeQuery,
},
Question: []dns.Question{
{
Name: "20010db800010002cafe000000001337.addr.dc1.consul",
Qtype: dns.TypeA,
Qclass: dns.ClassINET,
},
},
},
response: &dns.Msg{
MsgHdr: dns.MsgHdr{
Opcode: dns.OpcodeQuery,
Response: true,
Authoritative: true,
},
Compress: true,
Question: []dns.Question{
{
Name: "20010db800010002cafe000000001337.addr.dc1.consul.",
Qtype: dns.TypeA,
Qclass: dns.ClassINET,
},
},
Extra: []dns.RR{
&dns.AAAA{
Hdr: dns.RR_Header{
Name: "20010db800010002cafe000000001337.addr.dc1.consul.",
Rrtype: dns.TypeAAAA,
Class: dns.ClassINET,
Ttl: 123,
},
AAAA: net.ParseIP("2001:db8:1:2:cafe::1337"),
},
},
},
},
{
name: "test SRV 'addr.' query, ipv6 response",
// Since we asked for an SRV record, the AAAA record that resolves from the address is attached as an extra
request: &dns.Msg{
MsgHdr: dns.MsgHdr{
Opcode: dns.OpcodeQuery,
},
Question: []dns.Question{
{
Name: "20010db800010002cafe000000001337.addr.dc1.consul",
Qtype: dns.TypeSRV,
Qclass: dns.ClassINET,
},
},
},
response: &dns.Msg{
MsgHdr: dns.MsgHdr{
Opcode: dns.OpcodeQuery,
Response: true,
Authoritative: true,
},
Compress: true,
Question: []dns.Question{
{
Name: "20010db800010002cafe000000001337.addr.dc1.consul.",
Qtype: dns.TypeSRV,
Qclass: dns.ClassINET,
},
},
Extra: []dns.RR{
&dns.AAAA{
Hdr: dns.RR_Header{
Name: "20010db800010002cafe000000001337.addr.dc1.consul.",
Rrtype: dns.TypeAAAA,
Class: dns.ClassINET,
Ttl: 123,
},
AAAA: net.ParseIP("2001:db8:1:2:cafe::1337"),
},
},
},
},
{
name: "test ANY 'addr.' query, ipv6 response",
// The response to ANY should look the same as the AAAA response
request: &dns.Msg{
MsgHdr: dns.MsgHdr{
Opcode: dns.OpcodeQuery,
},
Question: []dns.Question{
{
Name: "20010db800010002cafe000000001337.addr.dc1.consul",
Qtype: dns.TypeANY,
Qclass: dns.ClassINET,
},
},
},
response: &dns.Msg{
MsgHdr: dns.MsgHdr{
Opcode: dns.OpcodeQuery,
Response: true,
Authoritative: true,
},
Compress: true,
Question: []dns.Question{
{
Name: "20010db800010002cafe000000001337.addr.dc1.consul.",
Qtype: dns.TypeANY,
Qclass: dns.ClassINET,
},
},
Answer: []dns.RR{
&dns.AAAA{
Hdr: dns.RR_Header{
Name: "20010db800010002cafe000000001337.addr.dc1.consul.",
Rrtype: dns.TypeAAAA,
Class: dns.ClassINET,
Ttl: 123,
},
AAAA: net.ParseIP("2001:db8:1:2:cafe::1337"),
},
},
},
},
{
name: "test malformed 'addr.' query",
request: &dns.Msg{
MsgHdr: dns.MsgHdr{
Opcode: dns.OpcodeQuery,
},
Question: []dns.Question{
{
Name: "c000.addr.dc1.consul", // too short
Qtype: dns.TypeA,
Qclass: dns.ClassINET,
},
},
},
response: &dns.Msg{
MsgHdr: dns.MsgHdr{
Opcode: dns.OpcodeQuery,
Response: true,
Rcode: dns.RcodeNameError, // NXDOMAIN
Authoritative: true,
},
Compress: true,
Question: []dns.Question{
{
Name: "c000.addr.dc1.consul.",
Qtype: dns.TypeA,
Qclass: dns.ClassINET,
},
},
Ns: []dns.RR{
&dns.SOA{
Hdr: dns.RR_Header{
Name: "consul.",
Rrtype: dns.TypeSOA,
Class: dns.ClassINET,
Ttl: 4,
},
Ns: "ns.consul.",
Serial: uint32(time.Now().Unix()),
Mbox: "hostmaster.consul.",
Refresh: 1,
Expire: 3,
Retry: 2,
Minttl: 4,
},
},
},
},
}
for _, tc := range testCases {
t.Run(tc.name, func(t *testing.T) {
runHandleTestCases(t, tc)
})
}
}
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