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Proper EDNS0 (non)support (#188)

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* Proper EDNS0 (non)support

* Add changelog entry

* Add EDNS0 tests
This commit is contained in:
Joona Hoikkala
2019-10-18 22:24:56 +03:00
committed by GitHub
parent 5b1e51534f
commit af542b44a9
3 changed files with 79 additions and 25 deletions
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76
dns_test.go
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@ -111,8 +111,48 @@ func TestResolveA(t *testing.T) {
func TestEDNS(t *testing.T) {
resolv := resolver{server: "127.0.0.1:15353"}
answer, _ := resolv.lookup("auth.example.org", dns.TypeOPT)
if answer.Rcode != dns.RcodeFormatError {
t.Errorf("Was expecing FORMERR rcode for OPT query, but got [%s] instead.", dns.RcodeToString[answer.Rcode])
if answer.Rcode != dns.RcodeSuccess {
t.Errorf("Was expecing NOERROR rcode for OPT query, but got [%s] instead.", dns.RcodeToString[answer.Rcode])
}
}
func TestEDNSA(t *testing.T) {
msg := new(dns.Msg)
msg.Id = dns.Id()
msg.Question = make([]dns.Question, 1)
msg.Question[0] = dns.Question{Name: dns.Fqdn("auth.example.org"), Qtype: dns.TypeA, Qclass: dns.ClassINET}
// Set EDNS0 with DO=1
msg.SetEdns0(512, true)
in, err := dns.Exchange(msg, "127.0.0.1:15353")
if err != nil {
t.Errorf("Error querying the server [%v]", err)
}
if in != nil && in.Rcode != dns.RcodeSuccess {
t.Errorf("Received error from the server [%s]", dns.RcodeToString[in.Rcode])
}
opt := in.IsEdns0()
if opt == nil {
t.Errorf("Should have got OPT back")
}
}
func TestEDNSBADVERS(t *testing.T) {
msg := new(dns.Msg)
msg.Id = dns.Id()
msg.Question = make([]dns.Question, 1)
msg.Question[0] = dns.Question{Name: dns.Fqdn("auth.example.org"), Qtype: dns.TypeA, Qclass: dns.ClassINET}
// Set EDNS0 with version 1
o := new(dns.OPT)
o.SetVersion(1)
o.Hdr.Name = "."
o.Hdr.Rrtype = dns.TypeOPT
msg.Extra = append(msg.Extra, o)
in, err := dns.Exchange(msg, "127.0.0.1:15353")
if err != nil {
t.Errorf("Error querying the server [%v]", err)
}
if in != nil && in.Rcode != dns.RcodeBadVers {
t.Errorf("Received unexpected rcode from the server [%s]", dns.RcodeToString[in.Rcode])
}
}
@ -220,25 +260,25 @@ func TestResolveTXT(t *testing.T) {
}
func TestCaseInsensitiveResolveA(t *testing.T) {
resolv := resolver{server: "127.0.0.1:15353"}
answer, err := resolv.lookup("aUtH.eXAmpLe.org", dns.TypeA)
if err != nil {
t.Errorf("%v", err)
}
resolv := resolver{server: "127.0.0.1:15353"}
answer, err := resolv.lookup("aUtH.eXAmpLe.org", dns.TypeA)
if err != nil {
t.Errorf("%v", err)
}
if len(answer.Answer) == 0 {
t.Error("No answer for DNS query")
}
if len(answer.Answer) == 0 {
t.Error("No answer for DNS query")
}
}
func TestCaseInsensitiveResolveSOA(t *testing.T) {
resolv := resolver{server: "127.0.0.1:15353"}
answer, _ := resolv.lookup("doesnotexist.aUtH.eXAmpLe.org", dns.TypeSOA)
if answer.Rcode != dns.RcodeNameError {
t.Errorf("Was expecing NXDOMAIN rcode, but got [%s] instead.", dns.RcodeToString[answer.Rcode])
}
resolv := resolver{server: "127.0.0.1:15353"}
answer, _ := resolv.lookup("doesnotexist.aUtH.eXAmpLe.org", dns.TypeSOA)
if answer.Rcode != dns.RcodeNameError {
t.Errorf("Was expecing NXDOMAIN rcode, but got [%s] instead.", dns.RcodeToString[answer.Rcode])
}
if len(answer.Ns) == 0 {
t.Error("No SOA answer for DNS query")
}
if len(answer.Ns) == 0 {
t.Error("No SOA answer for DNS query")
}
}