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provider_google_test.go
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provider_google_test.go
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package secureoperator
import (
"fmt"
"net/http"
"net/http/httptest"
"strconv"
"strings"
"testing"
"github.com/miekg/dns"
)
var gresp = `{"Status": 0,"TC": false,"RD": true,"RA": true,"AD": true,"CD": false,"Question":[ {"name": "example.com.","type": 1}],"Answer":[ {"name": "example.com.","type": 1,"TTL": 78172,"data": "93.184.216.34"}]}`
func TestQuery(t *testing.T) {
name := "example.com"
ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
q := r.URL.Query()
if n := q.Get("name"); n != name {
t.Errorf("unexpected name in query: %v", n)
}
if tp := q.Get("type"); tp != strconv.Itoa(int(dns.TypeA)) {
t.Errorf("unexpected type in query: %v", tp)
}
if ed := q.Get("edns_client_subnet"); ed != GoogleEDNSSentinelValue {
t.Errorf("expected EDNS to be set to Google sentinel value, was: %v", ed)
}
w.WriteHeader(http.StatusOK)
w.Header().Set("Content-Type", "application/json")
fmt.Fprint(w, gresp)
}))
defer ts.Close()
g, err := NewGDNSProvider(ts.URL, nil)
if err != nil {
t.Fatal(err)
}
resp, err := g.Query(DNSQuestion{
Name: name,
Type: dns.TypeA,
})
if err != nil {
t.Error(err)
}
a := resp.Answer[0]
if a.Name != "example.com." {
t.Errorf("unexpected name %v", a.Name)
}
if a.Type != dns.TypeA {
t.Errorf("unexpected type %v", a.Type)
}
if a.Data != "93.184.216.34" {
t.Errorf("unexpected data %v", a.Data)
}
if a.TTL != 78172 {
t.Errorf("unexpected TTL %v", a.TTL)
}
if resp.ResponseCode != 0 {
t.Errorf("unexpected response code %v", resp.ResponseCode)
}
}
func TestEDNS(t *testing.T) {
name := "example.com"
ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
q := r.URL.Query()
if n := q.Get("name"); n != name {
t.Errorf("unexpected name in query: %v", n)
}
if tp := q.Get("type"); tp != strconv.Itoa(int(dns.TypeA)) {
t.Errorf("unexpected type in query: %v", tp)
}
if e := q.Get("edns_client_subnet"); e != "64.10.0.0/20" {
t.Errorf("did not use edns_client_subnet option specified")
}
w.WriteHeader(http.StatusOK)
w.Header().Set("Content-Type", "application/json")
fmt.Fprint(w, gresp)
}))
defer ts.Close()
g, err := NewGDNSProvider(ts.URL, &GDNSOptions{
UseEDNSsubnetOption: true,
EDNSSubnet: "64.10.0.0/20",
})
if err != nil {
t.Fatal(err)
}
_, err = g.Query(DNSQuestion{
Name: name,
Type: dns.TypeA,
})
if err != nil {
t.Error(err)
}
}
func TestEDNSOmittedWhenBlank(t *testing.T) {
name := "example.com"
ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
q := r.URL.Query()
if n := q.Get("name"); n != name {
t.Errorf("unexpected name in query: %v", n)
}
if tp := q.Get("type"); tp != strconv.Itoa(int(dns.TypeA)) {
t.Errorf("unexpected type in query: %v", tp)
}
if strings.Contains(r.URL.RawQuery, "edns_client_subnet") {
t.Errorf("edns_client_subnet should be omitted")
}
w.WriteHeader(http.StatusOK)
w.Header().Set("Content-Type", "application/json")
fmt.Fprint(w, gresp)
}))
defer ts.Close()
g, err := NewGDNSProvider(ts.URL, &GDNSOptions{
UseEDNSsubnetOption: true,
EDNSSubnet: "",
})
if err != nil {
t.Fatal(err)
}
_, err = g.Query(DNSQuestion{
Name: name,
Type: dns.TypeA,
})
if err != nil {
t.Error(err)
}
}
func TestEDNSIgnoredByDefault(t *testing.T) {
// Deprecated: remove test in v4
name := "example.com"
ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
q := r.URL.Query()
if n := q.Get("name"); n != name {
t.Errorf("unexpected name in query: %v", n)
}
if tp := q.Get("type"); tp != strconv.Itoa(int(dns.TypeA)) {
t.Errorf("unexpected type in query: %v", tp)
}
if e := q.Get("edns_client_subnet"); e != "0.0.0.0/0" {
t.Errorf("did not use edns_client_subnet option specified")
}
w.WriteHeader(http.StatusOK)
w.Header().Set("Content-Type", "application/json")
fmt.Fprint(w, gresp)
}))
defer ts.Close()
g, err := NewGDNSProvider(ts.URL, &GDNSOptions{
EDNSSubnet: "64.10.0.0/20",
})
if err != nil {
t.Fatal(err)
}
_, err = g.Query(DNSQuestion{
Name: name,
Type: dns.TypeA,
})
if err != nil {
t.Error(err)
}
}
func TestPadding(t *testing.T) {
var expected int
ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
l := len([]byte(r.URL.String()))
// first request, set the expectation to the length of the first URL we
// see; if any others don't match it, our padding function fails
if expected == 0 {
expected = l
}
if l != expected {
t.Errorf("unexpected URL length: %v, expected: %v", l, expected)
}
w.WriteHeader(http.StatusOK)
w.Header().Set("Content-Type", "application/json")
fmt.Fprint(w, gresp)
}))
defer ts.Close()
g, err := NewGDNSProvider(ts.URL, &GDNSOptions{Pad: true})
if err != nil {
t.Fatal(err)
}
questions := []DNSQuestion{
DNSQuestion{Name: "whatever.yo", Type: dns.TypeA},
// ensure differing types result in the same padded length
DNSQuestion{Name: "sure.yep", Type: dns.TypeA},
DNSQuestion{Name: "sure.yep", Type: dns.TypeMX},
DNSQuestion{Name: "sure.yep", Type: dns.TypeTA},
// ensure very long domains are fine
DNSQuestion{Name: strings.Repeat("a", 253), Type: dns.TypeA},
DNSQuestion{Name: strings.Repeat("a", 253), Type: dns.TypeTA},
}
for _, q := range questions {
if _, err := g.Query(q); err != nil {
t.Errorf(err.Error())
}
}
// a name longer that 253 bytes should be an error
if _, err := g.Query(DNSQuestion{Name: strings.Repeat("a", 254)}); err == nil {
t.Errorf("expected an error for a too-long DNS name")
}
}
func TestNameTooLong(t *testing.T) {
ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
t.Errorf("no request should be made")
}))
defer ts.Close()
g, err := NewGDNSProvider(ts.URL, &GDNSOptions{Pad: true})
if err != nil {
t.Fatal(err)
}
// a name longer that 253 bytes should be an error
if _, err := g.Query(DNSQuestion{Name: strings.Repeat("a", 254)}); err == nil {
t.Errorf("expected an error for a too-long DNS name")
}
}