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package test
import (
"io/ioutil"
"log"
"testing"
"github.com/coredns/coredns/middleware/proxy"
"github.com/coredns/coredns/middleware/test"
"github.com/coredns/coredns/request"
"github.com/miekg/dns"
)
func TestReverseFallthrough(t *testing.T) {
t.Parallel()
name, rm, err := test.TempFile(".", exampleOrg)
if err != nil {
t.Fatalf("failed to created zone: %s", err)
}
defer rm()
corefile := `arpa:0 example.org:0 {
reverse 10.32.0.0/16 {
hostname ip-{ip}.{zone[2]}
#fallthrough
}
file ` + name + ` example.org
}
`
i, err := CoreDNSServer(corefile)
if err != nil {
t.Fatalf("Could not get CoreDNS serving instance: %s", err)
}
udp, _ := CoreDNSServerPorts(i, 0)
if udp == "" {
t.Fatalf("Could not get UDP listening port")
}
log.SetOutput(ioutil.Discard)
p := proxy.NewLookup([]string{udp})
state := request.Request{W: &test.ResponseWriter{}, Req: new(dns.Msg)}
resp, err := p.Lookup(state, "example.org.", dns.TypeA)
if err != nil {
t.Fatal("Expected to receive reply, but didn't")
}
// Reply should be SERVFAIL because of no fallthrough
if resp.Rcode != dns.RcodeServerFailure {
t.Fatalf("Expected SERVFAIL, but got: %d", resp.Rcode)
}
// Stop the server.
i.Stop()
// And redo with fallthrough enabled
corefile = `arpa:0 example.org:0 {
reverse 10.32.0.0/16 {
hostname ip-{ip}.{zone[2]}
fallthrough
}
file ` + name + ` example.org
}
`
i, err = CoreDNSServer(corefile)
if err != nil {
t.Fatalf("Could not get CoreDNS serving instance: %s", err)
}
udp, _ = CoreDNSServerPorts(i, 0)
if udp == "" {
t.Fatalf("Could not get UDP listening port")
}
defer i.Stop()
p = proxy.NewLookup([]string{udp})
resp, err = p.Lookup(state, "example.org.", dns.TypeA)
if err != nil {
t.Fatal("Expected to receive reply, but didn't")
}
if len(resp.Answer) == 0 {
t.Error("Expected to at least one RR in the answer section, got none")
}
if resp.Answer[0].Header().Rrtype != dns.TypeA {
t.Errorf("Expected RR to A, got: %d", resp.Answer[0].Header().Rrtype)
}
if resp.Answer[0].(*dns.A).A.String() != "127.0.0.1" {
t.Errorf("Expected 127.0.0.1, got: %s", resp.Answer[0].(*dns.A).A.String())
}
}
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