mirror of
https://github.com/coredns/coredns.git
synced 2025-10-30 17:53:21 -04:00
Rewrite edns0 (#561)
* Add edns0 code rewrite * check arg count * change `new`; set EDNS0 if request doesn't have it set * change set to replace_or_append * change to append_or_replace * return error in new * update documents * fixt UT * return error * go fmt * Rework for more general EDNS0 use Also changed how rules are created and validated. Implements EDNS0 NSID in addition to local. * go fmt * README updates, NSID tests and fixes * gofmt -s -w * Fix tests for rewrite syntax change * Add tests, fix error message * Review nits * Missed on nit * More tests, integration test, fix edns0 parse issue * Fix README, use RewriteIgnored * go fmt
This commit is contained in:
John Belamaric
committed by
Miek Gieben
Miek Gieben
parent
d1bb4ea130
commit
ef315ef3e2
@@ -1,6 +1,8 @@
|
||||
package rewrite
|
||||
|
||||
import (
|
||||
"bytes"
|
||||
"reflect"
|
||||
"testing"
|
||||
|
||||
"github.com/coredns/coredns/middleware"
|
||||
@@ -16,14 +18,73 @@ func msgPrinter(ctx context.Context, w dns.ResponseWriter, r *dns.Msg) (int, err
|
||||
return 0, nil
|
||||
}
|
||||
|
||||
func TestNewRule(t *testing.T) {
|
||||
tests := []struct {
|
||||
args []string
|
||||
shouldError bool
|
||||
expType reflect.Type
|
||||
}{
|
||||
{[]string{}, true, nil},
|
||||
{[]string{"foo"}, true, nil},
|
||||
{[]string{"name"}, true, nil},
|
||||
{[]string{"name", "a.com"}, true, nil},
|
||||
{[]string{"name", "a.com", "b.com", "c.com"}, true, nil},
|
||||
{[]string{"name", "a.com", "b.com"}, false, reflect.TypeOf(&nameRule{})},
|
||||
{[]string{"type"}, true, nil},
|
||||
{[]string{"type", "a"}, true, nil},
|
||||
{[]string{"type", "any", "a", "a"}, true, nil},
|
||||
{[]string{"type", "any", "a"}, false, reflect.TypeOf(&typeRule{})},
|
||||
{[]string{"type", "XY", "WV"}, true, nil},
|
||||
{[]string{"type", "ANY", "WV"}, true, nil},
|
||||
{[]string{"class"}, true, nil},
|
||||
{[]string{"class", "IN"}, true, nil},
|
||||
{[]string{"class", "ch", "in", "in"}, true, nil},
|
||||
{[]string{"class", "ch", "in"}, false, reflect.TypeOf(&classRule{})},
|
||||
{[]string{"class", "XY", "WV"}, true, nil},
|
||||
{[]string{"class", "IN", "WV"}, true, nil},
|
||||
{[]string{"edns0"}, true, nil},
|
||||
{[]string{"edns0", "local"}, true, nil},
|
||||
{[]string{"edns0", "local", "set"}, true, nil},
|
||||
{[]string{"edns0", "local", "set", "0xffee"}, true, nil},
|
||||
{[]string{"edns0", "local", "set", "65518", "abcdefg"}, false, reflect.TypeOf(&edns0LocalRule{})},
|
||||
{[]string{"edns0", "local", "set", "0xffee", "abcdefg"}, false, reflect.TypeOf(&edns0LocalRule{})},
|
||||
{[]string{"edns0", "local", "append", "0xffee", "abcdefg"}, false, reflect.TypeOf(&edns0LocalRule{})},
|
||||
{[]string{"edns0", "local", "replace", "0xffee", "abcdefg"}, false, reflect.TypeOf(&edns0LocalRule{})},
|
||||
{[]string{"edns0", "local", "foo", "0xffee", "abcdefg"}, true, nil},
|
||||
{[]string{"edns0", "local", "set", "0xffee", "0xabcdefg"}, true, nil},
|
||||
{[]string{"edns0", "nsid", "set", "junk"}, true, nil},
|
||||
{[]string{"edns0", "nsid", "set"}, false, reflect.TypeOf(&edns0NsidRule{})},
|
||||
{[]string{"edns0", "nsid", "append"}, false, reflect.TypeOf(&edns0NsidRule{})},
|
||||
{[]string{"edns0", "nsid", "replace"}, false, reflect.TypeOf(&edns0NsidRule{})},
|
||||
{[]string{"edns0", "nsid", "foo"}, true, nil},
|
||||
}
|
||||
|
||||
for i, tc := range tests {
|
||||
r, err := newRule(tc.args...)
|
||||
if err == nil && tc.shouldError {
|
||||
t.Errorf("Test %d: expected error but got success", i)
|
||||
} else if err != nil && !tc.shouldError {
|
||||
t.Errorf("Test %d: expected success but got error: %s", i, err)
|
||||
}
|
||||
|
||||
if !tc.shouldError && reflect.TypeOf(r) != tc.expType {
|
||||
t.Errorf("Test %d: expected %q but got %q", i, tc.expType, r)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func TestRewrite(t *testing.T) {
|
||||
rules := []Rule{}
|
||||
r, _ := newNameRule("from.nl.", "to.nl.")
|
||||
rules = append(rules, r)
|
||||
r, _ = newClassRule("CH", "IN")
|
||||
rules = append(rules, r)
|
||||
r, _ = newTypeRule("ANY", "HINFO")
|
||||
rules = append(rules, r)
|
||||
|
||||
rw := Rewrite{
|
||||
Next: middleware.HandlerFunc(msgPrinter),
|
||||
Rules: []Rule{
|
||||
Fields["name"].New("from.nl.", "to.nl."),
|
||||
Fields["class"].New("CH", "IN"),
|
||||
Fields["type"].New("ANY", "HINFO"),
|
||||
},
|
||||
Next: middleware.HandlerFunc(msgPrinter),
|
||||
Rules: rules,
|
||||
noRevert: true,
|
||||
}
|
||||
|
||||
@@ -56,7 +117,7 @@ func TestRewrite(t *testing.T) {
|
||||
|
||||
resp := rec.Msg
|
||||
if resp.Question[0].Name != tc.to {
|
||||
t.Errorf("Test %d: Expected Name to be '%s' but was '%s'", i, tc.to, resp.Question[0].Name)
|
||||
t.Errorf("Test %d: Expected Name to be %q but was %q", i, tc.to, resp.Question[0].Name)
|
||||
}
|
||||
if resp.Question[0].Qtype != tc.toT {
|
||||
t.Errorf("Test %d: Expected Type to be '%d' but was '%d'", i, tc.toT, resp.Question[0].Qtype)
|
||||
@@ -65,79 +126,162 @@ func TestRewrite(t *testing.T) {
|
||||
t.Errorf("Test %d: Expected Class to be '%d' but was '%d'", i, tc.toC, resp.Question[0].Qclass)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
regexps := [][]string{
|
||||
{"/reg/", ".*", "/to", ""},
|
||||
{"/r/", "[a-z]+", "/toaz", "!.html|"},
|
||||
{"/url/", "a([a-z0-9]*)s([A-Z]{2})", "/to/{path}", ""},
|
||||
{"/ab/", "ab", "/ab?{query}", ".txt|"},
|
||||
{"/ab/", "ab", "/ab?type=html&{query}", ".html|"},
|
||||
{"/abc/", "ab", "/abc/{file}", ".html|"},
|
||||
{"/abcd/", "ab", "/a/{dir}/{file}", ".html|"},
|
||||
{"/abcde/", "ab", "/a#{fragment}", ".html|"},
|
||||
{"/ab/", `.*\.jpg`, "/ajpg", ""},
|
||||
{"/reggrp", `/ad/([0-9]+)([a-z]*)`, "/a{1}/{2}", ""},
|
||||
{"/reg2grp", `(.*)`, "/{1}", ""},
|
||||
{"/reg3grp", `(.*)/(.*)/(.*)`, "/{1}{2}{3}", ""},
|
||||
func TestRewriteEDNS0Local(t *testing.T) {
|
||||
rw := Rewrite{
|
||||
Next: middleware.HandlerFunc(msgPrinter),
|
||||
noRevert: true,
|
||||
}
|
||||
|
||||
tests := []struct {
|
||||
fromOpts []dns.EDNS0
|
||||
args []string
|
||||
toOpts []dns.EDNS0
|
||||
}{
|
||||
{
|
||||
[]dns.EDNS0{},
|
||||
[]string{"local", "set", "0xffee", "0xabcdef"},
|
||||
[]dns.EDNS0{&dns.EDNS0_LOCAL{Code: 0xffee, Data: []byte{0xab, 0xcd, 0xef}}},
|
||||
},
|
||||
{
|
||||
[]dns.EDNS0{},
|
||||
[]string{"local", "append", "0xffee", "abcdefghijklmnop"},
|
||||
[]dns.EDNS0{&dns.EDNS0_LOCAL{Code: 0xffee, Data: []byte("abcdefghijklmnop")}},
|
||||
},
|
||||
{
|
||||
[]dns.EDNS0{},
|
||||
[]string{"local", "replace", "0xffee", "abcdefghijklmnop"},
|
||||
[]dns.EDNS0{},
|
||||
},
|
||||
{
|
||||
[]dns.EDNS0{},
|
||||
[]string{"nsid", "set"},
|
||||
[]dns.EDNS0{&dns.EDNS0_NSID{Code: dns.EDNS0NSID, Nsid: ""}},
|
||||
},
|
||||
{
|
||||
[]dns.EDNS0{},
|
||||
[]string{"nsid", "append"},
|
||||
[]dns.EDNS0{&dns.EDNS0_NSID{Code: dns.EDNS0NSID, Nsid: ""}},
|
||||
},
|
||||
{
|
||||
[]dns.EDNS0{},
|
||||
[]string{"nsid", "replace"},
|
||||
[]dns.EDNS0{},
|
||||
},
|
||||
}
|
||||
|
||||
ctx := context.TODO()
|
||||
for i, tc := range tests {
|
||||
m := new(dns.Msg)
|
||||
m.SetQuestion("example.com.", dns.TypeA)
|
||||
m.Question[0].Qclass = dns.ClassINET
|
||||
|
||||
r, err := newEdns0Rule(tc.args...)
|
||||
if err != nil {
|
||||
t.Errorf("Error creating test rule: %s", err)
|
||||
continue
|
||||
}
|
||||
rw.Rules = []Rule{r}
|
||||
|
||||
for _, regexpRule := range regexps {
|
||||
var ext []string
|
||||
if s := strings.Split(regexpRule[3], "|"); len(s) > 1 {
|
||||
ext = s[:len(s)-1]
|
||||
}
|
||||
rule, err := NewComplexRule(regexpRule[0], regexpRule[1], regexpRule[2], 0, ext, nil)
|
||||
if err != nil {
|
||||
t.Fatal(err)
|
||||
}
|
||||
rw.Rules = append(rw.Rules, rule)
|
||||
rec := dnsrecorder.New(&test.ResponseWriter{})
|
||||
rw.ServeDNS(ctx, rec, m)
|
||||
|
||||
resp := rec.Msg
|
||||
o := resp.IsEdns0()
|
||||
if o == nil {
|
||||
t.Errorf("Test %d: EDNS0 options not set", i)
|
||||
continue
|
||||
}
|
||||
*/
|
||||
/*
|
||||
statusTests := []struct {
|
||||
status int
|
||||
base string
|
||||
to string
|
||||
regexp string
|
||||
statusExpected bool
|
||||
}{
|
||||
{400, "/status", "", "", true},
|
||||
{400, "/ignore", "", "", false},
|
||||
{400, "/", "", "^/ignore", false},
|
||||
{400, "/", "", "(.*)", true},
|
||||
{400, "/status", "", "", true},
|
||||
if !optsEqual(o.Option, tc.toOpts) {
|
||||
t.Errorf("Test %d: Expected %v but got %v", i, tc.toOpts, o)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
for i, s := range statusTests {
|
||||
urlPath := fmt.Sprintf("/status%d", i)
|
||||
rule, err := NewComplexRule(s.base, s.regexp, s.to, s.status, nil, nil)
|
||||
if err != nil {
|
||||
t.Fatalf("Test %d: No error expected for rule but found %v", i, err)
|
||||
}
|
||||
rw.Rules = []Rule{rule}
|
||||
req, err := http.NewRequest("GET", urlPath, nil)
|
||||
if err != nil {
|
||||
t.Fatalf("Test %d: Could not create HTTP request: %v", i, err)
|
||||
}
|
||||
func TestEdns0LocalMultiRule(t *testing.T) {
|
||||
rules := []Rule{}
|
||||
r, _ := newEdns0Rule("local", "replace", "0xffee", "abcdef")
|
||||
rules = append(rules, r)
|
||||
r, _ = newEdns0Rule("local", "set", "0xffee", "fedcba")
|
||||
rules = append(rules, r)
|
||||
|
||||
rec := httptest.NewRecorder()
|
||||
code, err := rw.ServeHTTP(rec, req)
|
||||
if err != nil {
|
||||
t.Fatalf("Test %d: No error expected for handler but found %v", i, err)
|
||||
rw := Rewrite{
|
||||
Next: middleware.HandlerFunc(msgPrinter),
|
||||
Rules: rules,
|
||||
noRevert: true,
|
||||
}
|
||||
|
||||
tests := []struct {
|
||||
fromOpts []dns.EDNS0
|
||||
toOpts []dns.EDNS0
|
||||
}{
|
||||
{
|
||||
nil,
|
||||
[]dns.EDNS0{&dns.EDNS0_LOCAL{Code: 0xffee, Data: []byte("fedcba")}},
|
||||
},
|
||||
{
|
||||
[]dns.EDNS0{&dns.EDNS0_LOCAL{Code: 0xffee, Data: []byte("foobar")}},
|
||||
[]dns.EDNS0{&dns.EDNS0_LOCAL{Code: 0xffee, Data: []byte("abcdef")}},
|
||||
},
|
||||
}
|
||||
|
||||
ctx := context.TODO()
|
||||
for i, tc := range tests {
|
||||
m := new(dns.Msg)
|
||||
m.SetQuestion("example.com.", dns.TypeA)
|
||||
m.Question[0].Qclass = dns.ClassINET
|
||||
if tc.fromOpts != nil {
|
||||
o := m.IsEdns0()
|
||||
if o == nil {
|
||||
m.SetEdns0(4096, true)
|
||||
o = m.IsEdns0()
|
||||
}
|
||||
if s.statusExpected {
|
||||
if rec.Body.String() != "" {
|
||||
t.Errorf("Test %d: Expected empty body but found %s", i, rec.Body.String())
|
||||
o.Option = append(o.Option, tc.fromOpts...)
|
||||
}
|
||||
rec := dnsrecorder.New(&test.ResponseWriter{})
|
||||
rw.ServeDNS(ctx, rec, m)
|
||||
|
||||
resp := rec.Msg
|
||||
o := resp.IsEdns0()
|
||||
if o == nil {
|
||||
t.Errorf("Test %d: EDNS0 options not set", i)
|
||||
continue
|
||||
}
|
||||
if !optsEqual(o.Option, tc.toOpts) {
|
||||
t.Errorf("Test %d: Expected %v but got %v", i, tc.toOpts, o)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func optsEqual(a, b []dns.EDNS0) bool {
|
||||
if len(a) != len(b) {
|
||||
return false
|
||||
}
|
||||
for i := range a {
|
||||
switch aa := a[i].(type) {
|
||||
case *dns.EDNS0_LOCAL:
|
||||
if bb, ok := b[i].(*dns.EDNS0_LOCAL); ok {
|
||||
if aa.Code != bb.Code {
|
||||
return false
|
||||
}
|
||||
if code != s.status {
|
||||
t.Errorf("Test %d: Expected status code %d found %d", i, s.status, code)
|
||||
if !bytes.Equal(aa.Data, bb.Data) {
|
||||
return false
|
||||
}
|
||||
} else {
|
||||
if code != 0 {
|
||||
t.Errorf("Test %d: Expected no status code found %d", i, code)
|
||||
}
|
||||
return false
|
||||
}
|
||||
case *dns.EDNS0_NSID:
|
||||
if bb, ok := b[i].(*dns.EDNS0_NSID); ok {
|
||||
if aa.Nsid != bb.Nsid {
|
||||
return false
|
||||
}
|
||||
} else {
|
||||
return false
|
||||
}
|
||||
default:
|
||||
return false
|
||||
}
|
||||
*/
|
||||
}
|
||||
return true
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user