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parse_test.go
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parse_test.go
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package dns
import (
"bytes"
"crypto/rsa"
"encoding/hex"
"fmt"
"math/rand"
"net"
"reflect"
"regexp"
"strconv"
"strings"
"testing"
"testing/quick"
)
func TestDotInName(t *testing.T) {
buf := make([]byte, 20)
PackDomainName("aa\\.bb.nl.", buf, 0, nil, false)
// index 3 must be a real dot
if buf[3] != '.' {
t.Error("dot should be a real dot")
}
if buf[6] != 2 {
t.Error("this must have the value 2")
}
dom, _, _ := UnpackDomainName(buf, 0)
// printing it should yield the backspace again
if dom != "aa\\.bb.nl." {
t.Error("dot should have been escaped: ", dom)
}
}
func TestDotLastInLabel(t *testing.T) {
sample := "aa\\..au."
buf := make([]byte, 20)
_, err := PackDomainName(sample, buf, 0, nil, false)
if err != nil {
t.Fatalf("unexpected error packing domain: %v", err)
}
dom, _, _ := UnpackDomainName(buf, 0)
if dom != sample {
t.Fatalf("unpacked domain `%s' doesn't match packed domain", dom)
}
}
func TestTooLongDomainName(t *testing.T) {
l := "aaabbbcccdddeeefffggghhhiiijjjkkklllmmmnnnooopppqqqrrrsssttt."
dom := l + l + l + l + l + l + l
_, err := NewRR(dom + " IN A 127.0.0.1")
if err == nil {
t.Error("should be too long")
}
_, err = NewRR("..com. IN A 127.0.0.1")
if err == nil {
t.Error("should fail")
}
}
func TestDomainName(t *testing.T) {
tests := []string{"r\\.gieben.miek.nl.", "www\\.www.miek.nl.",
"www.*.miek.nl.", "www.*.miek.nl.",
}
dbuff := make([]byte, 40)
for _, ts := range tests {
if _, err := PackDomainName(ts, dbuff, 0, nil, false); err != nil {
t.Error("not a valid domain name")
continue
}
n, _, err := UnpackDomainName(dbuff, 0)
if err != nil {
t.Error("failed to unpack packed domain name")
continue
}
if ts != n {
t.Errorf("must be equal: in: %s, out: %s", ts, n)
}
}
}
func TestDomainNameAndTXTEscapes(t *testing.T) {
tests := []byte{'.', '(', ')', ';', ' ', '@', '"', '\\', 9, 13, 10, 0, 255}
for _, b := range tests {
rrbytes := []byte{
1, b, 0, // owner
byte(TypeTXT >> 8), byte(TypeTXT),
byte(ClassINET >> 8), byte(ClassINET),
0, 0, 0, 1, // TTL
0, 2, 1, b, // Data
}
rr1, _, err := UnpackRR(rrbytes, 0)
if err != nil {
panic(err)
}
s := rr1.String()
rr2, err := NewRR(s)
if err != nil {
t.Errorf("error parsing unpacked RR's string: %v", err)
}
repacked := make([]byte, len(rrbytes))
if _, err := PackRR(rr2, repacked, 0, nil, false); err != nil {
t.Errorf("error packing parsed RR: %v", err)
}
if !bytes.Equal(repacked, rrbytes) {
t.Error("packed bytes don't match original bytes")
}
}
}
func TestTXTEscapeParsing(t *testing.T) {
test := [][]string{
{`";"`, `";"`},
{`\;`, `";"`},
{`"\t"`, `"t"`},
{`"\r"`, `"r"`},
{`"\ "`, `" "`},
{`"\;"`, `";"`},
{`"\;\""`, `";\""`},
{`"\(a\)"`, `"(a)"`},
{`"\(a)"`, `"(a)"`},
{`"(a\)"`, `"(a)"`},
{`"(a)"`, `"(a)"`},
{`"\048"`, `"0"`},
{`"\` + "\t" + `"`, `"\009"`},
{`"\` + "\n" + `"`, `"\010"`},
{`"\` + "\r" + `"`, `"\013"`},
{`"\` + "\x11" + `"`, `"\017"`},
{`"\'"`, `"'"`},
}
for _, s := range test {
rr, err := NewRR(fmt.Sprintf("example.com. IN TXT %v", s[0]))
if err != nil {
t.Errorf("could not parse %v TXT: %s", s[0], err)
continue
}
txt := sprintTxt(rr.(*TXT).Txt)
if txt != s[1] {
t.Errorf("mismatch after parsing `%v` TXT record: `%v` != `%v`", s[0], txt, s[1])
}
}
}
func GenerateDomain(r *rand.Rand, size int) []byte {
dnLen := size % 70 // artificially limit size so there's less to interpret if a failure occurs
var dn []byte
done := false
for i := 0; i < dnLen && !done; {
max := dnLen - i
if max > 63 {
max = 63
}
lLen := max
if lLen != 0 {
lLen = int(r.Int31()) % max
}
done = lLen == 0
if done {
continue
}
l := make([]byte, lLen+1)
l[0] = byte(lLen)
for j := 0; j < lLen; j++ {
l[j+1] = byte(rand.Int31())
}
dn = append(dn, l...)
i += 1 + lLen
}
return append(dn, 0)
}
func TestDomainQuick(t *testing.T) {
r := rand.New(rand.NewSource(0))
f := func(l int) bool {
db := GenerateDomain(r, l)
ds, _, err := UnpackDomainName(db, 0)
if err != nil {
panic(err)
}
buf := make([]byte, 255)
off, err := PackDomainName(ds, buf, 0, nil, false)
if err != nil {
t.Errorf("error packing domain: %v", err)
t.Errorf(" bytes: %v", db)
t.Errorf("string: %v", ds)
return false
}
if !bytes.Equal(db, buf[:off]) {
t.Errorf("repacked domain doesn't match original:")
t.Errorf("src bytes: %v", db)
t.Errorf(" string: %v", ds)
t.Errorf("out bytes: %v", buf[:off])
return false
}
return true
}
if err := quick.Check(f, nil); err != nil {
t.Error(err)
}
}
func GenerateTXT(r *rand.Rand, size int) []byte {
rdLen := size % 300 // artificially limit size so there's less to interpret if a failure occurs
var rd []byte
for i := 0; i < rdLen; {
max := rdLen - 1
if max > 255 {
max = 255
}
sLen := max
if max != 0 {
sLen = int(r.Int31()) % max
}
s := make([]byte, sLen+1)
s[0] = byte(sLen)
for j := 0; j < sLen; j++ {
s[j+1] = byte(rand.Int31())
}
rd = append(rd, s...)
i += 1 + sLen
}
return rd
}
func TestParseDirectiveMisc(t *testing.T) {
tests := map[string]string{
"$ORIGIN miek.nl.\na IN NS b": "a.miek.nl.\t3600\tIN\tNS\tb.miek.nl.",
"$TTL 2H\nmiek.nl. IN NS b.": "miek.nl.\t7200\tIN\tNS\tb.",
"miek.nl. 1D IN NS b.": "miek.nl.\t86400\tIN\tNS\tb.",
`name. IN SOA a6.nstld.com. hostmaster.nic.name. (
203362132 ; serial
5m ; refresh (5 minutes)
5m ; retry (5 minutes)
2w ; expire (2 weeks)
300 ; minimum (5 minutes)
)`: "name.\t3600\tIN\tSOA\ta6.nstld.com. hostmaster.nic.name. 203362132 300 300 1209600 300",
". 3600000 IN NS ONE.MY-ROOTS.NET.": ".\t3600000\tIN\tNS\tONE.MY-ROOTS.NET.",
"ONE.MY-ROOTS.NET. 3600000 IN A 192.168.1.1": "ONE.MY-ROOTS.NET.\t3600000\tIN\tA\t192.168.1.1",
}
for i, o := range tests {
rr, err := NewRR(i)
if err != nil {
t.Error("failed to parse RR: ", err)
continue
}
if rr.String() != o {
t.Errorf("`%s' should be equal to\n`%s', but is `%s'", i, o, rr.String())
}
}
}
func TestNSEC(t *testing.T) {
nsectests := map[string]string{
"nl. IN NSEC3PARAM 1 0 5 30923C44C6CBBB8F": "nl.\t3600\tIN\tNSEC3PARAM\t1 0 5 30923C44C6CBBB8F",
"p2209hipbpnm681knjnu0m1febshlv4e.nl. IN NSEC3 1 1 5 30923C44C6CBBB8F P90DG1KE8QEAN0B01613LHQDG0SOJ0TA NS SOA TXT RRSIG DNSKEY NSEC3PARAM": "p2209hipbpnm681knjnu0m1febshlv4e.nl.\t3600\tIN\tNSEC3\t1 1 5 30923C44C6CBBB8F P90DG1KE8QEAN0B01613LHQDG0SOJ0TA NS SOA TXT RRSIG DNSKEY NSEC3PARAM",
"localhost.dnssex.nl. IN NSEC www.dnssex.nl. A RRSIG NSEC": "localhost.dnssex.nl.\t3600\tIN\tNSEC\twww.dnssex.nl. A RRSIG NSEC",
"localhost.dnssex.nl. IN NSEC www.dnssex.nl. A RRSIG NSEC TYPE65534": "localhost.dnssex.nl.\t3600\tIN\tNSEC\twww.dnssex.nl. A RRSIG NSEC TYPE65534",
"localhost.dnssex.nl. IN NSEC www.dnssex.nl. A RRSIG NSec Type65534": "localhost.dnssex.nl.\t3600\tIN\tNSEC\twww.dnssex.nl. A RRSIG NSEC TYPE65534",
"44ohaq2njb0idnvolt9ggthvsk1e1uv8.skydns.test. NSEC3 1 0 0 - 44OHAQ2NJB0IDNVOLT9GGTHVSK1E1UVA": "44ohaq2njb0idnvolt9ggthvsk1e1uv8.skydns.test.\t3600\tIN\tNSEC3\t1 0 0 - 44OHAQ2NJB0IDNVOLT9GGTHVSK1E1UVA",
}
for i, o := range nsectests {
rr, err := NewRR(i)
if err != nil {
t.Error("failed to parse RR: ", err)
continue
}
if rr.String() != o {
t.Errorf("`%s' should be equal to\n`%s', but is `%s'", i, o, rr.String())
}
}
rr, err := NewRR("nl. IN NSEC3PARAM 1 0 5 30923C44C6CBBB8F")
if err != nil {
t.Fatal("failed to parse RR: ", err)
}
if nsec3param, ok := rr.(*NSEC3PARAM); ok {
if nsec3param.SaltLength != 8 {
t.Fatalf("nsec3param saltlen %d != 8", nsec3param.SaltLength)
}
} else {
t.Fatal("not nsec3 param: ", err)
}
}
func TestParseLOC(t *testing.T) {
lt := map[string]string{
"SW1A2AA.find.me.uk. LOC 51 30 12.748 N 00 07 39.611 W 0.00m 0.00m 0.00m 0.00m": "SW1A2AA.find.me.uk.\t3600\tIN\tLOC\t51 30 12.748 N 00 07 39.611 W 0m 0.00m 0.00m 0.00m",
"SW1A2AA.find.me.uk. LOC 51 0 0.0 N 00 07 39.611 W 0.00m 0.00m 0.00m 0.00m": "SW1A2AA.find.me.uk.\t3600\tIN\tLOC\t51 00 0.000 N 00 07 39.611 W 0m 0.00m 0.00m 0.00m",
"SW1A2AA.find.me.uk. LOC 51 30 12.748 N 00 07 39.611 W 0.00m": "SW1A2AA.find.me.uk.\t3600\tIN\tLOC\t51 30 12.748 N 00 07 39.611 W 0m 1m 10000m 10m",
// Exercise boundary cases
"SW1A2AA.find.me.uk. LOC 90 0 0.0 N 180 0 0.0 W 42849672.95 90000000.00m 90000000.00m 90000000.00m": "SW1A2AA.find.me.uk.\t3600\tIN\tLOC\t90 00 0.000 N 180 00 0.000 W 42849672.95m 90000000m 90000000m 90000000m",
"SW1A2AA.find.me.uk. LOC 89 59 59.999 N 179 59 59.999 W -100000 90000000.00m 90000000.00m 90000000m": "SW1A2AA.find.me.uk.\t3600\tIN\tLOC\t89 59 59.999 N 179 59 59.999 W -100000m 90000000m 90000000m 90000000m",
// use float64 to have enough precision.
"example.com. LOC 42 21 43.952 N 71 5 6.344 W -24m 1m 200m 10m": "example.com.\t3600\tIN\tLOC\t42 21 43.952 N 71 05 6.344 W -24m 1m 200m 10m",
}
for i, o := range lt {
rr, err := NewRR(i)
if err != nil {
t.Error("failed to parse RR: ", err)
continue
}
if rr.String() != o {
t.Errorf("`%s' should be equal to\n`%s', but is `%s'", i, o, rr.String())
}
}
// Invalid cases (out of range values)
lt = map[string]string{ // Pair of (invalid) RDATA and the bad field name
// One of the subfields is out of range.
"91 0 0.0 N 00 07 39.611 W 0m": "Latitude",
"89 60 0.0 N 00 07 39.611 W 0m": "Latitude",
"89 00 60.0 N 00 07 39.611 W 0m": "Latitude",
"1 00 -1 N 00 07 39.611 W 0m": "Latitude",
"0 0 0.0 N 181 00 0.0 W 0m": "Longitude",
"0 0 0.0 N 179 60 0.0 W 0m": "Longitude",
"0 0 0.0 N 179 00 60.0 W 0m": "Longitude",
"0 0 0.0 N 1 00 -1 W 0m": "Longitude",
// Each subfield is valid, but resulting latitude would be out of range.
"90 01 00.0 N 00 07 39.611 W 0m": "Latitude",
"0 0 0.0 N 180 01 0.0 W 0m": "Longitude",
}
for rdata, field := range lt {
_, err := NewRR(fmt.Sprintf("example.com. LOC %s", rdata))
if err == nil || !strings.Contains(err.Error(), field) {
t.Errorf("expected error to contain %q, but got %v", field, err)
}
}
}
// this tests a subroutine for the LOC RR parser. It's complicated enough to test separately.
func TestStringToCm(t *testing.T) {
tests := []struct {
// Test description: the input token and the expected return values from stringToCm.
token string
e uint8
m uint8
ok bool
}{
{"100", 4, 1, true},
{"0100", 4, 1, true}, // leading 0 (allowed)
{"100.99", 4, 1, true},
{"90000000", 9, 9, true},
{"90000000.00", 9, 9, true},
{"0", 0, 0, true},
{"0.00", 0, 0, true},
{"0.01", 0, 1, true},
{".01", 0, 1, true}, // empty 'meter' part (allowed)
{"0.1", 1, 1, true},
// out of range (too large)
{"90000001", 0, 0, false},
{"90000000.01", 0, 0, false},
// more than 2 digits in 'cmeter' part
{"0.000", 0, 0, false},
{"0.001", 0, 0, false},
{"0.999", 0, 0, false},
// with plus or minus sign (disallowed)
{"-100", 0, 0, false},
{"+100", 0, 0, false},
{"0.-10", 0, 0, false},
{"0.+10", 0, 0, false},
{"0a.00", 0, 0, false}, // invalid string for 'meter' part
{".1x", 0, 0, false}, // invalid string for 'cmeter' part
{".", 0, 0, false}, // empty 'cmeter' part (disallowed)
{"1.", 0, 0, false}, // ditto
{"m", 0, 0, false}, // only the "m" suffix
}
for _, tc := range tests {
tc := tc
t.Run(tc.token, func(t *testing.T) {
// In all cases the expected result is the same with or without the 'm' suffix.
// So we test both cases using the same test code.
for _, sfx := range []string{"", "m"} {
token := tc.token + sfx
e, m, ok := stringToCm(token)
if ok != tc.ok {
t.Fatal("unexpected validation result")
}
if m != tc.m {
t.Fatalf("Expected %d, got %d", tc.m, m)
}
if e != tc.e {
t.Fatalf("Expected %d, got %d", tc.e, e)
}
}
})
}
}
func TestParseDS(t *testing.T) {
dt := map[string]string{
"example.net. 3600 IN DS 40692 12 3 22261A8B0E0D799183E35E24E2AD6BB58533CBA7E3B14D659E9CA09B 2071398F": "example.net.\t3600\tIN\tDS\t40692 12 3 22261A8B0E0D799183E35E24E2AD6BB58533CBA7E3B14D659E9CA09B2071398F",
}
for i, o := range dt {
rr, err := NewRR(i)
if err != nil {
t.Error("failed to parse RR: ", err)
continue
}
if rr.String() != o {
t.Errorf("`%s' should be equal to\n`%s', but is `%s'", i, o, rr.String())
}
}
}
func TestQuotes(t *testing.T) {
tests := map[string]string{
`t.example.com. IN TXT "a bc"`: "t.example.com.\t3600\tIN\tTXT\t\"a bc\"",
`t.example.com. IN TXT "a
bc"`: "t.example.com.\t3600\tIN\tTXT\t\"a\\010 bc\"",
`t.example.com. IN TXT ""`: "t.example.com.\t3600\tIN\tTXT\t\"\"",
`t.example.com. IN TXT "a"`: "t.example.com.\t3600\tIN\tTXT\t\"a\"",
`t.example.com. IN TXT "aa"`: "t.example.com.\t3600\tIN\tTXT\t\"aa\"",
`t.example.com. IN TXT "aaa" ;`: "t.example.com.\t3600\tIN\tTXT\t\"aaa\"",
`t.example.com. IN TXT "abc" "DEF"`: "t.example.com.\t3600\tIN\tTXT\t\"abc\" \"DEF\"",
`t.example.com. IN TXT "abc" ( "DEF" )`: "t.example.com.\t3600\tIN\tTXT\t\"abc\" \"DEF\"",
`t.example.com. IN TXT aaa ;`: "t.example.com.\t3600\tIN\tTXT\t\"aaa\"",
`t.example.com. IN TXT aaa aaa;`: "t.example.com.\t3600\tIN\tTXT\t\"aaa\" \"aaa\"",
`t.example.com. IN TXT aaa aaa`: "t.example.com.\t3600\tIN\tTXT\t\"aaa\" \"aaa\"",
`t.example.com. IN TXT aaa`: "t.example.com.\t3600\tIN\tTXT\t\"aaa\"",
"cid.urn.arpa. NAPTR 100 50 \"s\" \"z3950+I2L+I2C\" \"\" _z3950._tcp.gatech.edu.": "cid.urn.arpa.\t3600\tIN\tNAPTR\t100 50 \"s\" \"z3950+I2L+I2C\" \"\" _z3950._tcp.gatech.edu.",
"cid.urn.arpa. NAPTR 100 50 \"s\" \"rcds+I2C\" \"\" _rcds._udp.gatech.edu.": "cid.urn.arpa.\t3600\tIN\tNAPTR\t100 50 \"s\" \"rcds+I2C\" \"\" _rcds._udp.gatech.edu.",
"cid.urn.arpa. NAPTR 100 50 \"s\" \"http+I2L+I2C+I2R\" \"\" _http._tcp.gatech.edu.": "cid.urn.arpa.\t3600\tIN\tNAPTR\t100 50 \"s\" \"http+I2L+I2C+I2R\" \"\" _http._tcp.gatech.edu.",
"cid.urn.arpa. NAPTR 100 10 \"\" \"\" \"/urn:cid:.+@([^\\.]+\\.)(.*)$/\\2/i\" .": "cid.urn.arpa.\t3600\tIN\tNAPTR\t100 10 \"\" \"\" \"/urn:cid:.+@([^\\.]+\\.)(.*)$/\\2/i\" .",
}
for i, o := range tests {
rr, err := NewRR(i)
if err != nil {
t.Error("failed to parse RR: ", err)
continue
}
if rr.String() != o {
t.Errorf("`%s' should be equal to\n`%s', but is\n`%s'", i, o, rr.String())
}
}
}
func TestParseClass(t *testing.T) {
tests := map[string]string{
"t.example.com. IN A 127.0.0.1": "t.example.com. 3600 IN A 127.0.0.1",
"t.example.com. CS A 127.0.0.1": "t.example.com. 3600 CS A 127.0.0.1",
"t.example.com. CH A 127.0.0.1": "t.example.com. 3600 CH A 127.0.0.1",
// ClassANY can not occur in zone files
// "t.example.com. ANY A 127.0.0.1": "t.example.com. 3600 ANY A 127.0.0.1",
"t.example.com. NONE A 127.0.0.1": "t.example.com. 3600 NONE A 127.0.0.1",
"t.example.com. CLASS255 A 127.0.0.1": "t.example.com. 3600 CLASS255 A 127.0.0.1",
}
for i, o := range tests {
rr, err := NewRR(i)
if err != nil {
t.Error("failed to parse RR: ", err)
continue
}
if rr.String() != o {
t.Errorf("`%s' should be equal to\n`%s', but is\n`%s'", i, o, rr.String())
}
}
}
func TestBrace(t *testing.T) {
tests := map[string]string{
"(miek.nl.) 3600 IN A 127.0.1.1": "miek.nl.\t3600\tIN\tA\t127.0.1.1",
"miek.nl. (3600) IN MX (10) elektron.atoom.net.": "miek.nl.\t3600\tIN\tMX\t10 elektron.atoom.net.",
`miek.nl. IN (
3600 A 127.0.0.1)`: "miek.nl.\t3600\tIN\tA\t127.0.0.1",
"(miek.nl.) (A) (127.0.2.1)": "miek.nl.\t3600\tIN\tA\t127.0.2.1",
"miek.nl A 127.0.3.1": "miek.nl.\t3600\tIN\tA\t127.0.3.1",
"_ssh._tcp.local. 60 IN (PTR) stora._ssh._tcp.local.": "_ssh._tcp.local.\t60\tIN\tPTR\tstora._ssh._tcp.local.",
"miek.nl. NS ns.miek.nl": "miek.nl.\t3600\tIN\tNS\tns.miek.nl.",
`(miek.nl.) (
(IN)
(AAAA)
(::1) )`: "miek.nl.\t3600\tIN\tAAAA\t::1",
`(miek.nl.) (
(IN)
(AAAA)
(::1))`: "miek.nl.\t3600\tIN\tAAAA\t::1",
"miek.nl. IN AAAA ::2": "miek.nl.\t3600\tIN\tAAAA\t::2",
`((m)(i)ek.(n)l.) (SOA) (soa.) (soa.) (
2009032802 ; serial
21600 ; refresh (6 hours)
7(2)00 ; retry (2 hours)
604()800 ; expire (1 week)
3600 ; minimum (1 hour)
)`: "miek.nl.\t3600\tIN\tSOA\tsoa. soa. 2009032802 21600 7200 604800 3600",
"miek\\.nl. IN A 127.0.0.10": "miek\\.nl.\t3600\tIN\tA\t127.0.0.10",
"miek.nl. IN A 127.0.0.11": "miek.nl.\t3600\tIN\tA\t127.0.0.11",
"miek.nl. A 127.0.0.12": "miek.nl.\t3600\tIN\tA\t127.0.0.12",
`miek.nl. 86400 IN SOA elektron.atoom.net. miekg.atoom.net. (
2009032802 ; serial
21600 ; refresh (6 hours)
7200 ; retry (2 hours)
604800 ; expire (1 week)
3600 ; minimum (1 hour)
)`: "miek.nl.\t86400\tIN\tSOA\telektron.atoom.net. miekg.atoom.net. 2009032802 21600 7200 604800 3600",
}
for i, o := range tests {
rr, err := NewRR(i)
if err != nil {
t.Errorf("failed to parse RR: %v\n\t%s", err, i)
continue
}
if rr.String() != o {
t.Errorf("`%s' should be equal to\n`%s', but is `%s'", i, o, rr.String())
}
}
}
func TestParseFailure(t *testing.T) {
tests := []string{"miek.nl. IN A 327.0.0.1",
"miek.nl. IN AAAA ::x",
"miek.nl. IN MX a0 miek.nl.",
"miek.nl aap IN MX mx.miek.nl.",
"miek.nl 200 IN mxx 10 mx.miek.nl.",
"miek.nl. inn MX 10 mx.miek.nl.",
// "miek.nl. IN CNAME ", // actually valid nowadays, zero size rdata
"miek.nl. IN CNAME ..",
"miek.nl. PA MX 10 miek.nl.",
"miek.nl. ) IN MX 10 miek.nl.",
}
for _, s := range tests {
_, err := NewRR(s)
if err == nil {
t.Errorf("should have triggered an error: \"%s\"", s)
}
}
}
func TestOmittedTTL(t *testing.T) {
zone := `
$ORIGIN example.com.
example.com. 42 IN SOA ns1.example.com. hostmaster.example.com. 1 86400 60 86400 3600 ; TTL=42 SOA
example.com. NS 2 ; TTL=42 absolute owner name
@ MD 3 ; TTL=42 current-origin owner name
MF 4 ; TTL=42 leading-space implied owner name
43 TYPE65280 \# 1 05 ; TTL=43 implied owner name explicit TTL
MB 6 ; TTL=43 leading-tab implied owner name
$TTL 1337
example.com. 88 MG 7 ; TTL=88 explicit TTL
example.com. MR 8 ; TTL=1337 after first $TTL
$TTL 314
1 TXT 9 ; TTL=1 implied owner name explicit TTL
example.com. DNAME 10 ; TTL=314 after second $TTL
`
reCaseFromComment := regexp.MustCompile(`TTL=(\d+)\s+(.*)`)
z := NewZoneParser(strings.NewReader(zone), "", "")
var i int
for rr, ok := z.Next(); ok; rr, ok = z.Next() {
i++
expected := reCaseFromComment.FindStringSubmatch(z.Comment())
if len(expected) != 3 {
t.Errorf("regexp didn't match for record %d", i)
continue
}
expectedTTL, _ := strconv.ParseUint(expected[1], 10, 32)
ttl := rr.Header().Ttl
if ttl != uint32(expectedTTL) {
t.Errorf("%s: expected TTL %d, got %d", expected[2], expectedTTL, ttl)
}
}
if err := z.Err(); err != nil {
t.Error(err)
}
if i != 10 {
t.Errorf("expected %d records, got %d", 5, i)
}
}
func TestRelativeNameErrors(t *testing.T) {
var badZones = []struct {
label string
zoneContents string
expectedErr string
}{
{
"relative owner name without origin",
"example.com 3600 IN SOA ns.example.com. hostmaster.example.com. 1 86400 60 86400 3600",
"bad owner name",
},
{
"relative owner name in RDATA",
"example.com. 3600 IN SOA ns hostmaster 1 86400 60 86400 3600",
"bad SOA Ns",
},
{
"origin reference without origin",
"@ 3600 IN SOA ns.example.com. hostmaster.example.com. 1 86400 60 86400 3600",
"bad owner name",
},
{
"relative owner name in $INCLUDE",
"$INCLUDE file.db example.com",
"bad origin name",
},
{
"relative owner name in $ORIGIN",
"$ORIGIN example.com",
"bad origin name",
},
}
for _, errorCase := range badZones {
z := NewZoneParser(strings.NewReader(errorCase.zoneContents), "", "")
z.Next()
if err := z.Err(); err == nil {
t.Errorf("%s: expected error, got nil", errorCase.label)
} else if !strings.Contains(err.Error(), errorCase.expectedErr) {
t.Errorf("%s: expected error `%s`, got `%s`", errorCase.label, errorCase.expectedErr, err)
}
}
}
func TestHIP(t *testing.T) {
h := `www.example.com. IN HIP ( 2 200100107B1A74DF365639CC39F1D578
AwEAAbdxyhNuSutc5EMzxTs9LBPCIkOFH8cIvM4p
9+LrV4e19WzK00+CI6zBCQTdtWsuxKbWIy87UOoJTwkUs7lBu+Upr1gsNrut79ryra+bSRGQ
b1slImA8YVJyuIDsj7kwzG7jnERNqnWxZ48AWkskmdHaVDP4BcelrTI3rMXdXF5D
rvs1.example.com.
rvs2.example.com. )`
rr, err := NewRR(h)
if err != nil {
t.Fatalf("failed to parse RR: %v", err)
}
msg := new(Msg)
msg.Answer = []RR{rr, rr}
bytes, err := msg.Pack()
if err != nil {
t.Fatalf("failed to pack msg: %v", err)
}
if err := msg.Unpack(bytes); err != nil {
t.Fatalf("failed to unpack msg: %v", err)
}
if len(msg.Answer) != 2 {
t.Fatalf("2 answers expected: %v", msg)
}
for i, rr := range msg.Answer {
rr := rr.(*HIP)
if l := len(rr.RendezvousServers); l != 2 {
t.Fatalf("2 servers expected, only %d in record %d:\n%v", l, i, msg)
}
for j, s := range []string{"rvs1.example.com.", "rvs2.example.com."} {
if rr.RendezvousServers[j] != s {
t.Fatalf("expected server %d of record %d to be %s:\n%v", j, i, s, msg)
}
}
}
}
// Test with no known RR on the line
func TestLineNumberError2(t *testing.T) {
tests := map[string]string{
"example.com. 1000 SO master.example.com. admin.example.com. 1 4294967294 4294967293 4294967295 100": "dns: expecting RR type or class, not this...: \"SO\" at line: 1:21",
"example.com 1000 IN TALINK a.example.com. b..example.com.": "dns: bad TALINK NextName: \"b..example.com.\" at line: 1:57",
"example.com 1000 IN TALINK ( a.example.com. b..example.com. )": "dns: bad TALINK NextName: \"b..example.com.\" at line: 1:60",
`example.com 1000 IN TALINK ( a.example.com.
bb..example.com. )`: "dns: bad TALINK NextName: \"bb..example.com.\" at line: 2:18",
// This is a bug, it should report an error on line 1, but the new is already processed.
`example.com 1000 IN TALINK ( a.example.com. b...example.com.
)`: "dns: bad TALINK NextName: \"b...example.com.\" at line: 2:1"}
for in, errStr := range tests {
_, err := NewRR(in)
if err == nil {
t.Error("err is nil")
} else {
if err.Error() != errStr {
t.Errorf("%s: error should be %s is %v", in, errStr, err)
}
}
}
}
// Test if the calculations are correct
func TestRfc1982(t *testing.T) {
// If the current time and the timestamp are more than 68 years apart
// it means the date has wrapped. 0 is 1970
// fall in the current 68 year span
strtests := []string{"20120525134203", "19700101000000", "20380119031408"}
for _, v := range strtests {
if x, _ := StringToTime(v); v != TimeToString(x) {
t.Errorf("1982 arithmetic string failure %s (%s:%d)", v, TimeToString(x), x)
}
}
inttests := map[uint32]string{0: "19700101000000",
1 << 31: "20380119031408",
1<<32 - 1: "21060207062815",
}
for i, v := range inttests {
if TimeToString(i) != v {
t.Errorf("1982 arithmetic int failure %d:%s (%s)", i, v, TimeToString(i))
}
}
// Future tests, these dates get parsed to a date within the current 136 year span
future := map[string]string{"22680119031408": "20631123173144",
"19010101121212": "20370206184028",
"19210101121212": "20570206184028",
"19500101121212": "20860206184028",
"19700101000000": "19700101000000",
"19690101000000": "21050207062816",
"29210101121212": "21040522212236",
}
for from, to := range future {
x, _ := StringToTime(from)
y := TimeToString(x)
if y != to {
t.Errorf("1982 arithmetic future failure %s:%s (%s)", from, to, y)
}
}
}
func TestEmpty(t *testing.T) {
z := NewZoneParser(strings.NewReader(""), "", "")
for _, ok := z.Next(); ok; _, ok = z.Next() {
t.Errorf("should be empty")
}
if err := z.Err(); err != nil {
t.Error("got an error when it shouldn't")
}
}
func TestLowercaseTokens(t *testing.T) {
var testrecords = []string{
"example.org. 300 IN a 1.2.3.4",
"example.org. 300 in A 1.2.3.4",
"example.org. 300 in a 1.2.3.4",
"example.org. 300 a 1.2.3.4",
"example.org. 300 A 1.2.3.4",
"example.org. IN a 1.2.3.4",
"example.org. in A 1.2.3.4",
"example.org. in a 1.2.3.4",
"example.org. a 1.2.3.4",
"example.org. A 1.2.3.4",
"example.org. a 1.2.3.4",
"$ORIGIN example.org.\n a 1.2.3.4",
"$Origin example.org.\n a 1.2.3.4",
"$origin example.org.\n a 1.2.3.4",
"example.org. Class1 Type1 1.2.3.4",
}
for _, testrr := range testrecords {
_, err := NewRR(testrr)
if err != nil {
t.Errorf("failed to parse %#v, got %v", testrr, err)
}
}
}
func TestSRVPacking(t *testing.T) {
msg := Msg{}
things := []string{"1.2.3.4:8484",
"45.45.45.45:8484",
"84.84.84.84:8484",
}
for i, n := range things {
h, p, err := net.SplitHostPort(n)
if err != nil {
continue
}
port, _ := strconv.ParseUint(p, 10, 16)
rr := &SRV{
Hdr: RR_Header{Name: "somename.",
Rrtype: TypeSRV,
Class: ClassINET,
Ttl: 5},
Priority: uint16(i),
Weight: 5,
Port: uint16(port),
Target: h + ".",
}
msg.Answer = append(msg.Answer, rr)
}
_, err := msg.Pack()
if err != nil {
t.Fatalf("couldn't pack %v: %v", msg, err)
}
}
func TestParseBackslash(t *testing.T) {
if _, err := NewRR("nul\\000gap.test.globnix.net. 600 IN A 192.0.2.10"); err != nil {
t.Errorf("could not create RR with \\000 in it")
}
if _, err := NewRR(`nul\000gap.test.globnix.net. 600 IN TXT "Hello\123"`); err != nil {
t.Errorf("could not create RR with \\000 in it")
}
if _, err := NewRR(`m\ @\ iek.nl. IN 3600 A 127.0.0.1`); err != nil {
t.Errorf("could not create RR with \\ and \\@ in it")
}
}
func TestILNP(t *testing.T) {
tests := []string{
"host1.example.com.\t3600\tIN\tNID\t10 0014:4fff:ff20:ee64",
"host1.example.com.\t3600\tIN\tNID\t20 0015:5fff:ff21:ee65",
"host2.example.com.\t3600\tIN\tNID\t10 0016:6fff:ff22:ee66",
"host1.example.com.\t3600\tIN\tL32\t10 10.1.2.0",
"host1.example.com.\t3600\tIN\tL32\t20 10.1.4.0",
"host2.example.com.\t3600\tIN\tL32\t10 10.1.8.0",
"host1.example.com.\t3600\tIN\tL64\t10 2001:0DB8:1140:1000",
"host1.example.com.\t3600\tIN\tL64\t20 2001:0DB8:2140:2000",
"host2.example.com.\t3600\tIN\tL64\t10 2001:0DB8:4140:4000",
"host1.example.com.\t3600\tIN\tLP\t10 l64-subnet1.example.com.",
"host1.example.com.\t3600\tIN\tLP\t10 l64-subnet2.example.com.",
"host1.example.com.\t3600\tIN\tLP\t20 l32-subnet1.example.com.",
}
for _, t1 := range tests {
r, err := NewRR(t1)
if err != nil {
t.Fatalf("an error occurred: %v", err)
} else {
if t1 != r.String() {
t.Fatalf("strings should be equal %s %s", t1, r.String())
}
}
}
}
func TestGposEidNimloc(t *testing.T) {
dt := map[string]string{
"444433332222111199990123000000ff. NSAP-PTR foo.bar.com.": "444433332222111199990123000000ff.\t3600\tIN\tNSAP-PTR\tfoo.bar.com.",
"lillee. IN GPOS -32.6882 116.8652 10.0": "lillee.\t3600\tIN\tGPOS\t-32.6882 116.8652 10.0",
"hinault. IN GPOS -22.6882 116.8652 250.0": "hinault.\t3600\tIN\tGPOS\t-22.6882 116.8652 250.0",
"VENERA. IN NIMLOC 75234159EAC457800920": "VENERA.\t3600\tIN\tNIMLOC\t75234159EAC457800920",
"VAXA. IN EID 3141592653589793": "VAXA.\t3600\tIN\tEID\t3141592653589793",
}
for i, o := range dt {
rr, err := NewRR(i)
if err != nil {
t.Error("failed to parse RR: ", err)
continue
}
if rr.String() != o {
t.Errorf("`%s' should be equal to\n`%s', but is `%s'", i, o, rr.String())
}
}
}
func TestPX(t *testing.T) {
dt := map[string]string{
"*.net2.it. IN PX 10 net2.it. PRMD-net2.ADMD-p400.C-it.": "*.net2.it.\t3600\tIN\tPX\t10 net2.it. PRMD-net2.ADMD-p400.C-it.",
"ab.net2.it. IN PX 10 ab.net2.it. O-ab.PRMD-net2.ADMDb.C-it.": "ab.net2.it.\t3600\tIN\tPX\t10 ab.net2.it. O-ab.PRMD-net2.ADMDb.C-it.",
}
for i, o := range dt {
rr, err := NewRR(i)
if err != nil {
t.Error("failed to parse RR: ", err)
continue
}
if rr.String() != o {
t.Errorf("`%s' should be equal to\n`%s', but is `%s'", i, o, rr.String())
}
}
}
func TestComment(t *testing.T) {
// Comments we must see
comments := map[string]bool{
"; this is comment 1": true,
"; this is comment 2": true,
"; this is comment 4": true,
"; this is comment 6": true,
"; this is comment 7": true,
"; this is comment 8": true,
}
zone := `
foo. IN A 10.0.0.1 ; this is comment 1
foo. IN A (
10.0.0.2 ; this is comment 2
)
; this is comment 3
foo. IN A 10.0.0.3
foo. IN A ( 10.0.0.4 ); this is comment 4
foo. IN A 10.0.0.5
; this is comment 5
foo. IN A 10.0.0.6
foo. IN DNSKEY 256 3 5 AwEAAb+8l ; this is comment 6
foo. IN NSEC miek.nl. TXT RRSIG NSEC; this is comment 7
foo. IN TXT "THIS IS TEXT MAN"; this is comment 8
`
z := NewZoneParser(strings.NewReader(zone), ".", "")
for _, ok := z.Next(); ok; _, ok = z.Next() {
if z.Comment() != "" {
if _, okC := comments[z.Comment()]; !okC {
t.Errorf("wrong comment %q", z.Comment())
}
}
}
if err := z.Err(); err != nil {
t.Error("got an error when it shouldn't")
}
}
func TestZoneParserComments(t *testing.T) {
for i, test := range []struct {
zone string
comments []string
}{
{
`name. IN SOA a6.nstld.com. hostmaster.nic.name. (
203362132 ; serial
5m ; refresh (5 minutes)
5m ; retry (5 minutes)
2w ; expire (2 weeks)
300 ; minimum (5 minutes)
) ; y
. 3600000 IN NS ONE.MY-ROOTS.NET. ; x`,
[]string{"; serial ; refresh (5 minutes) ; retry (5 minutes) ; expire (2 weeks) ; minimum (5 minutes) ; y", "; x"},
},
{
`name. IN SOA a6.nstld.com. hostmaster.nic.name. (
203362132 ; serial
5m ; refresh (5 minutes)
5m ; retry (5 minutes)
2w ; expire (2 weeks)
300 ; minimum (5 minutes)
) ; y
. 3600000 IN NS ONE.MY-ROOTS.NET.`,
[]string{"; serial ; refresh (5 minutes) ; retry (5 minutes) ; expire (2 weeks) ; minimum (5 minutes) ; y", ""},
},
{
`name. IN SOA a6.nstld.com. hostmaster.nic.name. (
203362132 ; serial
5m ; refresh (5 minutes)
5m ; retry (5 minutes)
2w ; expire (2 weeks)
300 ; minimum (5 minutes)
)
. 3600000 IN NS ONE.MY-ROOTS.NET.`,
[]string{"; serial ; refresh (5 minutes) ; retry (5 minutes) ; expire (2 weeks) ; minimum (5 minutes)", ""},
},
{
`name. IN SOA a6.nstld.com. hostmaster.nic.name. (
203362132 ; serial
5m ; refresh (5 minutes)
5m ; retry (5 minutes)
2w ; expire (2 weeks)
300 ; minimum (5 minutes)
)
. 3600000 IN NS ONE.MY-ROOTS.NET. ; x`,
[]string{"; serial ; refresh (5 minutes) ; retry (5 minutes) ; expire (2 weeks) ; minimum (5 minutes)", "; x"},
},
{
`name. IN SOA a6.nstld.com. hostmaster.nic.name. (
203362132 ; serial
5m ; refresh (5 minutes)
5m ; retry (5 minutes)
2w ; expire (2 weeks)
300 ; minimum (5 minutes)
)`,
[]string{"; serial ; refresh (5 minutes) ; retry (5 minutes) ; expire (2 weeks) ; minimum (5 minutes)"},
},
{
`. 3600000 IN NS ONE.MY-ROOTS.NET. ; x`,
[]string{"; x"},
},
{
`. 3600000 IN NS ONE.MY-ROOTS.NET.`,
[]string{""},
},
{
`. 3600000 IN NS ONE.MY-ROOTS.NET. ;;x`,
[]string{";;x"},
},
} {
r := strings.NewReader(test.zone)
var j int
z := NewZoneParser(r, "", "")
for rr, ok := z.Next(); ok; rr, ok = z.Next() {
if j >= len(test.comments) {
t.Fatalf("too many records for zone %d at %d record, expected %d", i, j+1, len(test.comments))
}
if z.Comment() != test.comments[j] {
t.Errorf("invalid comment for record %d:%d %v", i, j, rr)
t.Logf("expected %q", test.comments[j])
t.Logf("got %q", z.Comment())
}
j++
}
if err := z.Err(); err != nil {
t.Fatal(err)
}