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name : parse_test.go 
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
}

// Ok, 2 things. 1) this test breaks with the new functionality of splitting up larger txt
// chunks into 255 byte pieces. 2) I don't like the random nature of this thing, because I can't
// place the quotes where they need to be.
// So either add some code the places the quotes in just the right spots, make this non random
// or do something else.
// Disabled for now. (miek)
func testTXTRRQuick(t *testing.T) {
	s := rand.NewSource(0)
	r := rand.New(s)
	typeAndClass := []byte{
		byte(TypeTXT >> 8), byte(TypeTXT),
		byte(ClassINET >> 8), byte(ClassINET),
		0, 0, 0, 1, // TTL
	}
	f := func(l int) bool {
		owner := GenerateDomain(r, l)
		rdata := GenerateTXT(r, l)
		rrbytes := make([]byte, 0, len(owner)+2+2+4+2+len(rdata))
		rrbytes = append(rrbytes, owner...)
		rrbytes = append(rrbytes, typeAndClass...)
		rrbytes = append(rrbytes, byte(len(rdata)>>8), byte(len(rdata)))
		rrbytes = append(rrbytes, rdata...)
		rr, _, err := UnpackRR(rrbytes, 0)
		if err != nil {
			panic(err)
		}
		buf := make([]byte, len(rrbytes)*3)
		off, err := PackRR(rr, buf, 0, nil, false)
		if err != nil {
			t.Errorf("pack Error: %v\nRR: %v", err, rr)
			return false
		}
		buf = buf[:off]
		if !bytes.Equal(buf, rrbytes) {
			t.Errorf("packed bytes don't match original bytes")
			t.Errorf("src bytes: %v", rrbytes)
			t.Errorf("   struct: %v", rr)
			t.Errorf("out bytes: %v", buf)
			return false
		}
		if len(rdata) == 0 {
			// stringifying won't produce any data to parse
			return true
		}
		rrString := rr.String()
		rr2, err := NewRR(rrString)
		if err != nil {
			t.Errorf("error parsing own output: %v", err)
			t.Errorf("struct: %v", rr)
			t.Errorf("string: %v", rrString)
			return false
		}
		if rr2.String() != rrString {
			t.Errorf("parsed rr.String() doesn't match original string")
			t.Errorf("original: %v", rrString)
			t.Errorf("  parsed: %v", rr2.String())
			return false
		}

		buf = make([]byte, len(rrbytes)*3)
		off, err = PackRR(rr2, buf, 0, nil, false)
		if err != nil {
			t.Errorf("error packing parsed rr: %v", err)
			t.Errorf("unpacked Struct: %v", rr)
			t.Errorf("         string: %v", rrString)
			t.Errorf("  parsed Struct: %v", rr2)
			return false
		}
		buf = buf[:off]
		if !bytes.Equal(buf, rrbytes) {
			t.Errorf("parsed packed bytes don't match original bytes")
			t.Errorf("   source bytes: %v", rrbytes)
			t.Errorf("unpacked struct: %v", rr)
			t.Errorf("         string: %v", rrString)
			t.Errorf("  parsed struct: %v", rr2)
			t.Errorf(" repacked bytes: %v", buf)
			return false
		}
		return true
	}
	c := &quick.Config{MaxCountScale: 10}
	if err := quick.Check(f, c); err != nil {
		t.Error(err)
	}
}

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)
		}

		if j != len(test.comments) {
			t.Errorf("too few records for zone %d, got %d, expected %d", i, j, len(test.comments))
		}
	}
}

func TestEUIxx(t *testing.T) {
	tests := map[string]string{
		"host.example. IN EUI48 00-00-5e-90-01-2a":       "host.example.\t3600\tIN\tEUI48\t00-00-5e-90-01-2a",
		"host.example. IN EUI64 00-00-5e-ef-00-00-00-2a": "host.example.\t3600\tIN\tEUI64\t00-00-5e-ef-00-00-00-2a",
	}
	for i, o := range tests {
		r, err := NewRR(i)
		if err != nil {
			t.Errorf("failed to parse %s: %v", i, err)
		}
		if r.String() != o {
			t.Errorf("want %s, got %s", o, r.String())
		}
	}
}

func TestUserRR(t *testing.T) {
	tests := map[string]string{
		"host.example. IN UID 1234":              "host.example.\t3600\tIN\tUID\t1234",
		"host.example. IN GID 1234556":           "host.example.\t3600\tIN\tGID\t1234556",
		"host.example. IN UINFO \"Miek Gieben\"": "host.example.\t3600\tIN\tUINFO\t\"Miek Gieben\"",
	}
	for i, o := range tests {
		r, err := NewRR(i)
		if err != nil {
			t.Errorf("failed to parse %s: %v", i, err)
		}
		if r.String() != o {
			t.Errorf("want %s, got %s", o, r.String())
		}
	}
}

func TestTXT(t *testing.T) {
	// Test single entry TXT record
	rr, err := NewRR(`_raop._tcp.local. 60 IN TXT "single value"`)
	if err != nil {
		t.Error("failed to parse single value TXT record", err)
	} else if rr, ok := rr.(*TXT); !ok {
		t.Error("wrong type, record should be of type TXT")
	} else {
		if len(rr.Txt) != 1 {
			t.Error("bad size of TXT value:", len(rr.Txt))
		} else if rr.Txt[0] != "single value" {
			t.Error("bad single value")
		}
		if rr.String() != `_raop._tcp.local.	60	IN	TXT	"single value"` {
			t.Error("bad representation of TXT record:", rr.String())
		}
		if Len(rr) != 28+1+12 {
			t.Error("bad size of serialized record:", Len(rr))
		}
	}

	// Test multi entries TXT record
	rr, err = NewRR(`_raop._tcp.local. 60 IN TXT "a=1" "b=2" "c=3" "d=4"`)
	if err != nil {
		t.Error("failed to parse multi-values TXT record", err)
	} else if rr, ok := rr.(*TXT); !ok {
		t.Error("wrong type, record should be of type TXT")
	} else {
		if len(rr.Txt) != 4 {
			t.Error("bad size of TXT multi-value:", len(rr.Txt))
		} else if rr.Txt[0] != "a=1" || rr.Txt[1] != "b=2" || rr.Txt[2] != "c=3" || rr.Txt[3] != "d=4" {
			t.Error("bad values in TXT records")
		}
		if rr.String() != `_raop._tcp.local.	60	IN	TXT	"a=1" "b=2" "c=3" "d=4"` {
			t.Error("bad representation of TXT multi value record:", rr.String())
		}
		if Len(rr) != 28+1+3+1+3+1+3+1+3 {
			t.Error("bad size of serialized multi value record:", Len(rr))
		}
	}

	// Test empty-string in TXT record
	rr, err = NewRR(`_raop._tcp.local. 60 IN TXT ""`)
	if err != nil {
		t.Error("failed to parse empty-string TXT record", err)
	} else if rr, ok := rr.(*TXT); !ok {
		t.Error("wrong type, record should be of type TXT")
	} else {
		if len(rr.Txt) != 1 {
			t.Error("bad size of TXT empty-string value:", len(rr.Txt))
		} else if rr.Txt[0] != "" {
			t.Error("bad value for empty-string TXT record")
		}
		if rr.String() != `_raop._tcp.local.	60	IN	TXT	""` {
			t.Error("bad representation of empty-string TXT record:", rr.String())
		}
		if Len(rr) != 28+1 {
			t.Error("bad size of serialized record:", Len(rr))
		}
	}

	// Test TXT record with chunk larger than 255 bytes, they should be split up, by the parser
	s := ""
	for i := 0; i < 255; i++ {
		s += "a"
	}
	s += "b"
	rr, err = NewRR(`test.local. 60 IN TXT "` + s + `"`)
	if err != nil {
		t.Error("failed to parse empty-string TXT record", err)
	}
	if rr.(*TXT).Txt[1] != "b" {
		t.Errorf("Txt should have two chunk, last one my be 'b', but is %s", rr.(*TXT).Txt[1])
	}
}

func TestTypeXXXX(t *testing.T) {
	_, err := NewRR("example.com IN TYPE1234 \\# 4 aabbccdd")
	if err != nil {
		t.Errorf("failed to parse TYPE1234 RR: %v", err)
	}
	_, err = NewRR("example.com IN TYPE655341 \\# 8 aabbccddaabbccdd")
	if err == nil {
		t.Errorf("this should not work, for TYPE655341")
	}
	_, err = NewRR("example.com IN TYPE1 \\# 4 0a000001")
	if err != nil {
		t.Errorf("failed to parse TYPE1 RR: %v", err)
	}
}

func TestPTR(t *testing.T) {
	_, err := NewRR("144.2.0.192.in-addr.arpa. 900 IN PTR ilouse03146p0\\(.example.com.")
	if err != nil {
		t.Error("failed to parse ", err)
	}
}

func TestDigit(t *testing.T) {
	tests := map[string]byte{
		"miek\\000.nl. 100 IN TXT \"A\"": 0,
		"miek\\001.nl. 100 IN TXT \"A\"": 1,
		"miek\\254.nl. 100 IN TXT \"A\"": 254,
		"miek\\255.nl. 100 IN TXT \"A\"": 255,
		"miek\\256.nl. 100 IN TXT \"A\"": 0,
		"miek\\257.nl. 100 IN TXT \"A\"": 1,
		"miek\\004.nl. 100 IN TXT \"A\"": 4,
	}
	for s, i := range tests {
		r, err := NewRR(s)
		buf := make([]byte, 40)
		if err != nil {
			t.Fatalf("failed to parse %v", err)
		}
		PackRR(r, buf, 0, nil, false)
		if buf[5] != i {
			t.Fatalf("5 pos must be %d, is %d", i, buf[5])
		}
		r1, _, _ := UnpackRR(buf, 0)
		if r1.Header().Ttl != 100 {
			t.Fatalf("TTL should %d, is %d", 100, r1.Header().Ttl)
		}
	}
}

func TestParseRRSIGTimestamp(t *testing.T) {
	tests := map[string]bool{
		`miek.nl.  IN RRSIG SOA 8 2 43200 20140210031301 20140111031301 12051 miek.nl. MVZUyrYwq0iZhMFDDnVXD2BvuNiUJjSYlJAgzyAE6CF875BMvvZa+Sb0 RlSCL7WODQSQHhCx/fegHhVVF+Iz8N8kOLrmXD1+jO3Bm6Prl5UhcsPx WTBsg/kmxbp8sR1kvH4oZJtVfakG3iDerrxNaf0sQwhZzyfJQAqpC7pcBoc=`: true,
		`miek.nl.  IN RRSIG SOA 8 2 43200 315565800 4102477800 12051 miek.nl. MVZUyrYwq0iZhMFDDnVXD2BvuNiUJjSYlJAgzyAE6CF875BMvvZa+Sb0 RlSCL7WODQSQHhCx/fegHhVVF+Iz8N8kOLrmXD1+jO3Bm6Prl5UhcsPx WTBsg/kmxbp8sR1kvH4oZJtVfakG3iDerrxNaf0sQwhZzyfJQAqpC7pcBoc=`:          true,
	}
	for r := range tests {
		_, err := NewRR(r)
		if err != nil {
			t.Error(err)
		}
	}
}

func TestTxtEqual(t *testing.T) {
	rr1 := new(TXT)
	rr1.Hdr = RR_Header{Name: ".", Rrtype: TypeTXT, Class: ClassINET, Ttl: 0}
	rr1.Txt = []string{"a\"a", "\"", "b"}
	rr2, _ := NewRR(rr1.String())
	if rr1.String() != rr2.String() {
		// This is not an error, but keep this test.
		t.Errorf("these two TXT records should match:\n%s\n%s", rr1.String(), rr2.String())
	}
}

func TestTxtLong(t *testing.T) {
	rr1 := new(TXT)
	rr1.Hdr = RR_Header{Name: ".", Rrtype: TypeTXT, Class: ClassINET, Ttl: 0}
	// Make a long txt record, this breaks when sending the packet,
	// but not earlier.
	rr1.Txt = []string{"start-"}
	for i := 0; i < 200; i++ {
		rr1.Txt[0] += "start-"
	}
	str := rr1.String()
	if len(str) < len(rr1.Txt[0]) {
		t.Error("string conversion should work")
	}
}

// Basically, don't crash.
func TestMalformedPackets(t *testing.T) {
	var packets = []string{
		"0021641c0000000100000000000078787878787878787878787303636f6d0000100001",
	}

	// com = 63 6f 6d
	for _, packet := range packets {
		data, _ := hex.DecodeString(packet)
		var msg Msg
		msg.Unpack(data)
	}
}

type algorithm struct {
	name uint8
	bits int
}

func TestNewPrivateKey(t *testing.T) {
	if testing.Short() {
		t.Skip("skipping test in short mode.")
	}
	algorithms := []algorithm{
		{ECDSAP256SHA256, 256},
		{ECDSAP384SHA384, 384},
		{RSASHA1, 512},
		{RSASHA256, 512},
		{ED25519, 256},
	}

	for _, algo := range algorithms {
		key := new(DNSKEY)
		key.Hdr.Rrtype = TypeDNSKEY
		key.Hdr.Name = "miek.nl."
		key.Hdr.Class = ClassINET
		key.Hdr.Ttl = 14400
		key.Flags = 256
		key.Protocol = 3
		key.Algorithm = algo.name
		privkey, err := key.Generate(algo.bits)
		if err != nil {
			t.Fatal(err)
		}

		newPrivKey, err := key.NewPrivateKey(key.PrivateKeyString(privkey))
		if err != nil {
			t.Error(key.String())
			t.Error(key.PrivateKeyString(privkey))
			t.Fatal(err)
		}

		switch newPrivKey := newPrivKey.(type) {
		case *rsa.PrivateKey:
			newPrivKey.Precompute()
		}

		if !reflect.DeepEqual(privkey, newPrivKey) {
			t.Errorf("[%v] Private keys differ:\n%#v\n%#v", AlgorithmToString[algo.name], privkey, newPrivKey)
		}
	}
}

// special input test
func TestNewRRSpecial(t *testing.T) {
	var (
		rr     RR
		err    error
		expect string
	)

	rr, err = NewRR("; comment")
	expect = ""
	if err != nil {
		t.Errorf("unexpected err: %v", err)
	}
	if rr != nil {
		t.Errorf("unexpected result: [%s] != [%s]", rr, expect)
	}

	rr, err = NewRR("")
	expect = ""
	if err != nil {
		t.Errorf("unexpected err: %v", err)
	}
	if rr != nil {
		t.Errorf("unexpected result: [%s] != [%s]", rr, expect)
	}

	rr, err = NewRR("$ORIGIN foo.")
	expect = ""
	if err != nil {
		t.Errorf("unexpected err: %v", err)
	}
	if rr != nil {
		t.Errorf("unexpected result: [%s] != [%s]", rr, expect)
	}

	rr, err = NewRR(" ")
	expect = ""
	if err != nil {
		t.Errorf("unexpected err: %v", err)
	}
	if rr != nil {
		t.Errorf("unexpected result: [%s] != [%s]", rr, expect)
	}

	rr, err = NewRR("\n")
	expect = ""
	if err != nil {
		t.Errorf("unexpected err: %v", err)
	}
	if rr != nil {
		t.Errorf("unexpected result: [%s] != [%s]", rr, expect)
	}

	rr, err = NewRR("foo. A 1.1.1.1\nbar. A 2.2.2.2")
	expect = "foo.\t3600\tIN\tA\t1.1.1.1"
	if err != nil {
		t.Errorf("unexpected err: %v", err)
	}
	if rr == nil || rr.String() != expect {
		t.Errorf("unexpected result: [%s] != [%s]", rr, expect)
	}
}

func TestPrintfVerbsRdata(t *testing.T) {
	x, _ := NewRR("www.miek.nl. IN MX 20 mx.miek.nl.")
	if Field(x, 1) != "20" {
		t.Errorf("should be 20")
	}
	if Field(x, 2) != "mx.miek.nl." {
		t.Errorf("should be mx.miek.nl.")
	}

	x, _ = NewRR("www.miek.nl. IN A 127.0.0.1")
	if Field(x, 1) != "127.0.0.1" {
		t.Errorf("should be 127.0.0.1")
	}

	x, _ = NewRR("www.miek.nl. IN AAAA ::1")
	if Field(x, 1) != "::1" {
		t.Errorf("should be ::1")
	}

	x, _ = NewRR("www.miek.nl. IN NSEC a.miek.nl. A NS SOA MX AAAA")
	if Field(x, 1) != "a.miek.nl." {
		t.Errorf("should be a.miek.nl.")
	}
	if Field(x, 2) != "A NS SOA MX AAAA" {
		t.Errorf("should be A NS SOA MX AAAA")
	}

	x, _ = NewRR("www.miek.nl. IN TXT \"first\" \"second\"")
	if Field(x, 1) != "first second" {
		t.Errorf("should be first second")
	}
	if Field(x, 0) != "" {
		t.Errorf("should be empty")
	}
}

func TestParseTokenOverflow(t *testing.T) {
	_, err := NewRR("_443._tcp.example.org. IN TLSA 0 0 0 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")
	if err == nil {
		t.Fatalf("token overflow should return an error")
	}
}

func TestParseTLSA(t *testing.T) {
	lt := []string{
		"_443._tcp.example.org.\t3600\tIN\tTLSA\t1 1 1 c22be239f483c08957bc106219cc2d3ac1a308dfbbdd0a365f17b9351234cf00",
		"_443._tcp.example.org.\t3600\tIN\tTLSA\t2 1 2 4e85f45179e9cd6e0e68e2eb5be2e85ec9b92d91c609caf3ef0315213e3f92ece92c38397a607214de95c7fadc0ad0f1c604a469a0387959745032c0d51492f3",
		"_443._tcp.example.org.\t3600\tIN\tTLSA\t3 0 2 69ec8d2277360b215d0cd956b0e2747108dff34b27d461a41c800629e38ee6c2d1230cc9e8e36711330adc6766e6ff7c5fbb37f106f248337c1a20ad682888d2",
	}
	for _, o := range lt {
		rr, err := NewRR(o)
		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'", o, o, rr.String())
		}
	}
}

func TestParseSMIMEA(t *testing.T) {
	lt := map[string]string{
		"2e85e1db3e62be6ea._smimecert.example.com.\t3600\tIN\tSMIMEA\t1 1 2 bd80f334566928fc18f58df7e4928c1886f48f71ca3fd41cd9b1854aca7c2180aaacad2819612ed68e7bd3701cc39be7f2529b017c0bc6a53e8fb3f0c7d48070":   "2e85e1db3e62be6ea._smimecert.example.com.\t3600\tIN\tSMIMEA\t1 1 2 bd80f334566928fc18f58df7e4928c1886f48f71ca3fd41cd9b1854aca7c2180aaacad2819612ed68e7bd3701cc39be7f2529b017c0bc6a53e8fb3f0c7d48070",
		"2e85e1db3e62be6ea._smimecert.example.com.\t3600\tIN\tSMIMEA\t0 0 1 cdcf0fc66b182928c5217ddd42c826983f5a4b94160ee6c1c9be62d38199f710":                                                                   "2e85e1db3e62be6ea._smimecert.example.com.\t3600\tIN\tSMIMEA\t0 0 1 cdcf0fc66b182928c5217ddd42c826983f5a4b94160ee6c1c9be62d38199f710",
		"2e85e1db3e62be6ea._smimecert.example.com.\t3600\tIN\tSMIMEA\t3 0 2 499a1eda2af8828b552cdb9d80c3744a25872fddd73f3898d8e4afa3549595d2dd4340126e759566fe8c26b251fa0c887ba4869f011a65f7e79967c2eb729f5b":   "2e85e1db3e62be6ea._smimecert.example.com.\t3600\tIN\tSMIMEA\t3 0 2 499a1eda2af8828b552cdb9d80c3744a25872fddd73f3898d8e4afa3549595d2dd4340126e759566fe8c26b251fa0c887ba4869f011a65f7e79967c2eb729f5b",
		"2e85e1db3e62be6eb._smimecert.example.com.\t3600\tIN\tSMIMEA\t3 0 2 499a1eda2af8828b552cdb9d80c3744a25872fddd73f3898d8e4afa3549595d2dd4340126e759566fe8 c26b251fa0c887ba4869f01 1a65f7e79967c2eb729f5b": "2e85e1db3e62be6eb._smimecert.example.com.\t3600\tIN\tSMIMEA\t3 0 2 499a1eda2af8828b552cdb9d80c3744a25872fddd73f3898d8e4afa3549595d2dd4340126e759566fe8c26b251fa0c887ba4869f011a65f7e79967c2eb729f5b",
	}
	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'", o, o, rr.String())
		}
	}
}

func TestParseSSHFP(t *testing.T) {
	lt := []string{
		"test.example.org.\t300\tSSHFP\t1 2 (\n" +
			"\t\t\t\t\tBC6533CDC95A79078A39A56EA7635984ED655318ADA9\n" +
			"\t\t\t\t\tB6159E30723665DA95BB )",
		"test.example.org.\t300\tSSHFP\t1 2 ( BC6533CDC  95A79078A39A56EA7635984ED655318AD  A9B6159E3072366 5DA95BB )",
	}
	result := "test.example.org.\t300\tIN\tSSHFP\t1 2 BC6533CDC95A79078A39A56EA7635984ED655318ADA9B6159E30723665DA95BB"
	for _, o := range lt {
		rr, err := NewRR(o)
		if err != nil {
			t.Error("failed to parse RR: ", err)
			continue
		}
		if rr.String() != result {
			t.Errorf("`%s' should be equal to\n\n`%s', but is     \n`%s'", o, result, rr.String())
		}
	}
}

func TestParseHINFO(t *testing.T) {
	dt := map[string]string{
		"example.net. HINFO A B": "example.net.	3600	IN	HINFO	\"A\" \"B\"",
		"example.net. HINFO \"A\" \"B\"": "example.net.	3600	IN	HINFO	\"A\" \"B\"",
		"example.net. HINFO A B C D E F": "example.net.	3600	IN	HINFO	\"A\" \"B C D E F\"",
		"example.net. HINFO AB": "example.net.	3600	IN	HINFO	\"AB\" \"\"",
		// "example.net. HINFO PC-Intel-700mhz \"Redhat Linux 7.1\"": "example.net.	3600	IN	HINFO	\"PC-Intel-700mhz\" \"Redhat Linux 7.1\"",
		// This one is recommended in Pro Bind book http://www.zytrax.com/books/dns/ch8/hinfo.html
		// but effectively, even Bind would replace it to correctly formed text when you AXFR
		// TODO: remove this set of comments or figure support for quoted/unquoted combinations in endingToTxtSlice function
	}
	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 TestParseCAA(t *testing.T) {
	lt := map[string]string{
		"example.net.	CAA	0 issue \"symantec.com\"": "example.net.\t3600\tIN\tCAA\t0 issue \"symantec.com\"",
		"example.net.	CAA	0 issuewild \"symantec.com; stuff\"": "example.net.\t3600\tIN\tCAA\t0 issuewild \"symantec.com; stuff\"",
		"example.net.	CAA	128 tbs \"critical\"": "example.net.\t3600\tIN\tCAA\t128 tbs \"critical\"",
		"example.net.	CAA	2 auth \"0>09\\006\\010+\\006\\001\\004\\001\\214y\\002\\003\\001\\006\\009`\\134H\\001e\\003\\004\\002\\001\\004 y\\209\\012\\221r\\220\\156Q\\218\\150\\150{\\166\\245:\\231\\182%\\157:\\133\\179}\\1923r\\238\\151\\255\\128q\\145\\002\\001\\000\"": "example.net.\t3600\tIN\tCAA\t2 auth \"0>09\\006\\010+\\006\\001\\004\\001\\214y\\002\\003\\001\\006\\009`\\134H\\001e\\003\\004\\002\\001\\004 y\\209\\012\\221r\\220\\156Q\\218\\150\\150{\\166\\245:\\231\\182%\\157:\\133\\179}\\1923r\\238\\151\\255\\128q\\145\\002\\001\\000\"",
		"example.net.   TYPE257	0 issue \"symantec.com\"": "example.net.\t3600\tIN\tCAA\t0 issue \"symantec.com\"",
	}
	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())
		}
	}
}

func TestPackCAA(t *testing.T) {
	m := new(Msg)
	record := new(CAA)
	record.Hdr = RR_Header{Name: "example.com.", Rrtype: TypeCAA, Class: ClassINET, Ttl: 0}
	record.Tag = "issue"
	record.Value = "symantec.com"
	record.Flag = 1

	m.Answer = append(m.Answer, record)
	bytes, err := m.Pack()
	if err != nil {
		t.Fatalf("failed to pack msg: %v", err)
	}
	if err := m.Unpack(bytes); err != nil {
		t.Fatalf("failed to unpack msg: %v", err)
	}
	if len(m.Answer) != 1 {
		t.Fatalf("incorrect number of answers unpacked")
	}
	rr := m.Answer[0].(*CAA)
	if rr.Tag != "issue" {
		t.Fatalf("invalid tag for unpacked answer")
	} else if rr.Value != "symantec.com" {
		t.Fatalf("invalid value for unpacked answer")
	} else if rr.Flag != 1 {
		t.Fatalf("invalid flag for unpacked answer")
	}
}

func TestParseURI(t *testing.T) {
	lt := map[string]string{
		"_http._tcp. IN URI   10 1 \"http://www.example.com/path\"": "_http._tcp.\t3600\tIN\tURI\t10 1 \"http://www.example.com/path\"",
		"_http._tcp. IN URI   10 1 \"\"":                            "_http._tcp.\t3600\tIN\tURI\t10 1 \"\"",
	}
	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())
		}
	}
}

func TestParseAVC(t *testing.T) {
	avcs := map[string]string{
		`example.org. IN AVC "app-name:WOLFGANG|app-class:OAM|business=yes"`: `example.org.	3600	IN	AVC	"app-name:WOLFGANG|app-class:OAM|business=yes"`,
	}
	for avc, o := range avcs {
		rr, err := NewRR(avc)
		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'", avc, o, rr.String())
		}
	}
}

func TestParseCSYNC(t *testing.T) {
	syncs := map[string]string{
		`example.com. 3600 IN CSYNC 66 3 A NS AAAA`: `example.com.	3600	IN	CSYNC	66 3 A NS AAAA`,
	}
	for s, o := range syncs {
		rr, err := NewRR(s)
		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'", s, o, rr.String())
		}
	}
}

func TestParseSVCB(t *testing.T) {
	svcbs := map[string]string{
		`example.com. 3600 IN SVCB 0 cloudflare.com.`: `example.com.	3600	IN	SVCB	0 cloudflare.com.`,
		`example.com. 3600 IN SVCB 65000 cloudflare.com. alpn=h2 ipv4hint=3.4.3.2`: `example.com.	3600	IN	SVCB	65000 cloudflare.com. alpn="h2" ipv4hint="3.4.3.2"`,
		`example.com. 3600 IN SVCB 65000 cloudflare.com. key65000=4\ 3 key65001="\" " key65002 key65003= key65004="" key65005== key65006==\"\" key65007=\254 key65008=\032`: `example.com.	3600	IN	SVCB	65000 cloudflare.com. key65000="4\ 3" key65001="\"\ " key65002="" key65003="" key65004="" key65005="=" key65006="=\"\"" key65007="\254" key65008="\ "`,
	}
	for s, o := range svcbs {
		rr, err := NewRR(s)
		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'", s, o, rr.String())
		}
	}
}

func TestParseBadSVCB(t *testing.T) {
	header := `example.com. 3600 IN HTTPS `
	evils := []string{
		`0 . no-default-alpn`,     // aliasform
		`65536 . no-default-alpn`, // bad priority
		`1 ..`,                    // bad domain
		`1 . no-default-alpn=1`,   // value illegal
		`1 . key`,                 // invalid key
		`1 . key=`,                // invalid key
		`1 . =`,                   // invalid key
		`1 . ==`,                  // invalid key
		`1 . =a`,                  // invalid key
		`1 . ""`,                  // invalid key
		`1 . ""=`,                 // invalid key
		`1 . "a"`,                 // invalid key
		`1 . "a"=`,                // invalid key
		`1 . key1=`,               // we know that key
		`1 . key65535`,            // key reserved
		`1 . key065534`,           // key can't be padded
		`1 . key65534="f`,         // unterminated value
		`1 . key65534="`,          // unterminated value
		`1 . key65534=\2`,         // invalid numeric escape
		`1 . key65534=\24`,        // invalid numeric escape
		`1 . key65534=\256`,       // invalid numeric escape
		`1 . key65534=\`,          // invalid numeric escape
		`1 . key65534=""alpn`,     // zQuote ending needs whitespace
		`1 . key65534="a"alpn`,    // zQuote ending needs whitespace
		`1 . ipv6hint=1.1.1.1`,    // not ipv6
		`1 . ipv6hint=1:1:1:1`,    // not ipv6
		`1 . ipv6hint=a`,          // not ipv6
		`1 . ipv4hint=1.1.1.1.1`,  // not ipv4
		`1 . ipv4hint=::fc`,       // not ipv4
		`1 . ipv4hint=..11`,       // not ipv4
		`1 . ipv4hint=a`,          // not ipv4
		`1 . port=`,               // empty port
		`1 . echconfig=YUd`,       // bad base64
	}
	for _, o := range evils {
		_, err := NewRR(header + o)
		if err == nil {
			t.Error("failed to reject invalid RR: ", header+o)
			continue
		}
	}
}

func TestParseBadNAPTR(t *testing.T) {
	// Should look like: mplus.ims.vodafone.com.	3600	IN	NAPTR	10 100 "S" "SIP+D2U" "" _sip._udp.mplus.ims.vodafone.com.
	naptr := `mplus.ims.vodafone.com.	3600	IN	NAPTR	10 100 S SIP+D2U  _sip._udp.mplus.ims.vodafone.com.`
	_, err := NewRR(naptr) // parse fails, we should not have leaked a goroutine.
	if err == nil {
		t.Fatalf("parsing NAPTR should have failed: %s", naptr)
	}
	if err := goroutineLeaked(); err != nil {
		t.Errorf("leaked goroutines: %s", err)
	}
}

func TestUnbalancedParens(t *testing.T) {
	sig := `example.com. 3600 IN RRSIG MX 15 2 3600 (
              1440021600 1438207200 3613 example.com. (
              oL9krJun7xfBOIWcGHi7mag5/hdZrKWw15jPGrHpjQeRAvTdszaPD+QLs3f
              x8A4M3e23mRZ9VrbpMngwcrqNAg== )`
	_, err := NewRR(sig)
	if err == nil {
		t.Fatalf("failed to detect extra opening brace")
	}
}

func TestBad(t *testing.T) {
	tests := []string{
		`" TYPE257 9 1E12\x00\x105"`,
		`" TYPE256  9 5"`,
		`" TYPE257 0\"00000000000000400000000000000000000\x00\x10000000000000000000000000000000000 9 l\x16\x01\x005266"`,
	}
	for i := range tests {
		s, err := strconv.Unquote(tests[i])
		if err != nil {
			t.Fatalf("failed to unquote: %q: %s", tests[i], err)
		}
		if _, err = NewRR(s); err == nil {
			t.Errorf("correctly parsed %q", s)
		}
	}
}

func TestNULLRecord(t *testing.T) {
	// packet captured from iodine
	packet := `8116840000010001000000000569627a6c700474657374046d69656b026e6c00000a0001c00c000a0001000000000005497f000001`
	data, _ := hex.DecodeString(packet)
	msg := new(Msg)
	err := msg.Unpack(data)
	if err != nil {
		t.Fatalf("Failed to unpack NULL record")
	}
	if _, ok := msg.Answer[0].(*NULL); !ok {
		t.Fatalf("Expected packet to contain NULL record")
	}
}

func TestParseAPL(t *testing.T) {
	tests := []struct {
		name   string
		in     string
		expect string
	}{
		{
			"v4",
			". APL 1:192.0.2.0/24",
			".\t3600\tIN\tAPL\t1:192.0.2.0/24",
		},
		{
			"v6",
			". APL 2:2001:db8::/32",
			".\t3600\tIN\tAPL\t2:2001:db8::/32",
		},
		{
			"null v6",
			". APL 2:::/0",
			".\t3600\tIN\tAPL\t2:::/0",
		},
		{
			"null v4",
			". APL 1:0.0.0.0/0",
			".\t3600\tIN\tAPL\t1:0.0.0.0/0",
		},
		{
			"full v6",
			". APL 2:::/0",
			".\t3600\tIN\tAPL\t2:::/0",
		},
		{
			"full v4",
			". APL 1:192.0.2.1/32",
			".\t3600\tIN\tAPL\t1:192.0.2.1/32",
		},
		{
			"full v6",
			". APL 2:2001:0db8:d2b4:b6ba:50db:49cc:a8d1:5bb1/128",
			".\t3600\tIN\tAPL\t2:2001:db8:d2b4:b6ba:50db:49cc:a8d1:5bb1/128",
		},
		{
			"v4in6",
			". APL 2:::ffff:192.0.2.0/120",
			".\t3600\tIN\tAPL\t2:::ffff:192.0.2.0/120",
		},
		{
			"v4in6 v6 syntax",
			". APL 2:::ffff:c000:0200/120",
			".\t3600\tIN\tAPL\t2:::ffff:192.0.2.0/120",
		},
		{
			"negate",
			". APL !1:192.0.2.0/24",
			".\t3600\tIN\tAPL\t!1:192.0.2.0/24",
		},
		{
			"multiple",
			". APL 1:192.0.2.0/24 !1:192.0.2.1/32 2:2001:db8::/32 !2:2001:db8:1::0/48",
			".\t3600\tIN\tAPL\t1:192.0.2.0/24 !1:192.0.2.1/32 2:2001:db8::/32 !2:2001:db8:1::/48",
		},
		{
			"no address",
			". APL",
			".\t3600\tIN\tAPL\t",
		},
	}
	for _, tc := range tests {
		t.Run(tc.name, func(t *testing.T) {
			rr, err := NewRR(tc.in)
			if err != nil {
				t.Fatalf("failed to parse RR: %s", err)
			}

			got := rr.String()
			if got != tc.expect {
				t.Errorf("expected %q, got %q", tc.expect, got)
			}
		})
	}
}

func TestParseAPLErrors(t *testing.T) {
	tests := []struct {
		name string
		in   string
	}{
		{
			"unexpected",
			`. APL ""`,
		},
		{
			"unrecognized family",
			". APL 3:0.0.0.0/0",
		},
		{
			"malformed family",
			". APL foo:0.0.0.0/0",
		},
		{
			"malformed address",
			". APL 1:192.0.2/16",
		},
		{
			"extra bits",
			". APL 2:2001:db8::/0",
		},
		{
			"address mismatch v2",
			". APL 1:2001:db8::/64",
		},
		{
			"address mismatch v6",
			". APL 2:192.0.2.1/32",
		},
		{
			"no prefix",
			". APL 1:192.0.2.1",
		},
		{
			"no family",
			". APL 0.0.0.0/0",
		},
	}
	for _, tc := range tests {
		t.Run(tc.name, func(t *testing.T) {
			_, err := NewRR(tc.in)
			if err == nil {
				t.Fatal("expected error, got none")
			}
		})
	}
}

func TestUnpackRRWithHeaderInvalidLengths(t *testing.T) {
	rr, err := NewRR("test.example.org. 300 IN SSHFP 1 2 BC6533CDC95A79078A39A56EA7635984ED655318ADA9B6159E30723665DA95BB")
	if err != nil {
		t.Fatalf("failed to parse SSHFP record: %v", err)
	}

	buf := make([]byte, Len(rr))
	headerEnd, end, err := packRR(rr, buf, 0, compressionMap{}, false)
	if err != nil {
		t.Fatalf("failed to pack A record: %v", err)
	}

	rr.Header().Rdlength = uint16(end - headerEnd)
	for _, off := range []int{
		-1,
		end + 1,
		1<<16 - 1,
	} {
		_, _, err := UnpackRRWithHeader(*rr.Header(), buf, off)
		if de, ok := err.(*Error); !ok || de.err != "bad off" {
			t.Errorf("UnpackRRWithHeader with bad offset (%d) returned wrong or no error: %v", off, err)
		}
	}

	for _, rdlength := range []uint16{
		uint16(end - headerEnd + 1),
		uint16(end),
		1<<16 - 1,
	} {
		rr.Header().Rdlength = rdlength

		_, _, err := UnpackRRWithHeader(*rr.Header(), buf, headerEnd)
		if de, ok := err.(*Error); !ok || de.err != "bad rdlength" {
			t.Errorf("UnpackRRWithHeader with bad rdlength (%d) returned wrong or no error: %v", rdlength, err)
		}
	}
}

func TestParseZONEMD(t *testing.T) {
	// Uses examples from https://tools.ietf.org/html/rfc8976
	dt := map[string]string{
		// Simple Zone
		`example.	86400	IN	ZONEMD	2018031900 1 1 (
										c68090d90a7aed71
										6bc459f9340e3d7c
										1370d4d24b7e2fc3
										a1ddc0b9a87153b9
										a9713b3c9ae5cc27
										777f98b8e730044c )
		`: "example.\t86400\tIN\tZONEMD\t2018031900 1 1 c68090d90a7aed716bc459f9340e3d7c1370d4d24b7e2fc3a1ddc0b9a87153b9a9713b3c9ae5cc27777f98b8e730044c",
		// Complex Zone
		`example.	86400	IN	ZONEMD	2018031900 1 1 (
										a3b69bad980a3504
										e1cffcb0fd6397f9
										3848071c93151f55
										2ae2f6b1711d4bd2
										d8b39808226d7b9d
										b71e34b72077f8fe )
		`: "example.\t86400\tIN\tZONEMD\t2018031900 1 1 a3b69bad980a3504e1cffcb0fd6397f93848071c93151f552ae2f6b1711d4bd2d8b39808226d7b9db71e34b72077f8fe",
		// Multiple Digests Zone
		`example.	86400	IN	ZONEMD	2018031900 1 1 (
										62e6cf51b02e54b9
										b5f967d547ce4313
										6792901f9f88e637
										493daaf401c92c27
										9dd10f0edb1c56f8
										080211f8480ee306 )
		`: "example.\t86400\tIN\tZONEMD\t2018031900 1 1 62e6cf51b02e54b9b5f967d547ce43136792901f9f88e637493daaf401c92c279dd10f0edb1c56f8080211f8480ee306",
		`example.	86400	IN	ZONEMD	2018031900 1 2 (
										08cfa1115c7b948c
										4163a901270395ea
										226a930cd2cbcf2f
										a9a5e6eb85f37c8a
										4e114d884e66f176
										eab121cb02db7d65
										2e0cc4827e7a3204
										f166b47e5613fd27 )
		`: "example.\t86400\tIN\tZONEMD\t2018031900 1 2 08cfa1115c7b948c4163a901270395ea226a930cd2cbcf2fa9a5e6eb85f37c8a4e114d884e66f176eab121cb02db7d652e0cc4827e7a3204f166b47e5613fd27",
		`example.	86400	IN	ZONEMD	2018031900 1 240 (
										e2d523f654b9422a
										96c5a8f44607bbee )
		`: "example.	86400	IN	ZONEMD	2018031900 1 240 e2d523f654b9422a96c5a8f44607bbee",
		`example.	86400	IN	ZONEMD	2018031900 241 1 (
										e1846540e33a9e41
										89792d18d5d131f6
										05fc283e )
		`: "example.	86400	IN	ZONEMD	2018031900 241 1 e1846540e33a9e4189792d18d5d131f605fc283e",
		// URI.ARPA zone
		`uri.arpa.		3600	IN		ZONEMD	2018100702 1 1 (
			0dbc3c4dbfd75777c12ca19c337854b1577799901307c482e9d91d5d15
			cd934d16319d98e30c4201cf25a1d5a0254960 )`: "uri.arpa.\t3600\tIN\tZONEMD\t2018100702 1 1 0dbc3c4dbfd75777c12ca19c337854b1577799901307c482e9d91d5d15cd934d16319d98e30c4201cf25a1d5a0254960",
		// ROOT-SERVERS.NET Zone
		`root-servers.net.     3600000 IN  ZONEMD  2018091100 1 1 (
			f1ca0ccd91bd5573d9f431c00ee0101b2545c97602be0a97
			8a3b11dbfc1c776d5b3e86ae3d973d6b5349ba7f04340f79 )
		`: "root-servers.net.\t3600000\tIN\tZONEMD\t2018091100 1 1 f1ca0ccd91bd5573d9f431c00ee0101b2545c97602be0a978a3b11dbfc1c776d5b3e86ae3d973d6b5349ba7f04340f79",
	}
	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())
		}
	}
}
© 2026 GrazzMean
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Digital Marketing

We drive growth through data-driven strategies and cutting-edge techniques.

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We design websites that are not only visually stunning but also user-centric, ensuring seamless navigation and enhanced user experience.

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“Beegazpacho feels like an extension of our team. Their content marketing and social media expertise have elevated our brand. They listen, adapt, and always deliver on time. We look forward to continuing this partnership.”

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“Beegazpacho’s data-driven strategies helped us improve our online ads, optimize our website, and enhance branding. We’ve seen great ROI and increased visibility. Their professionalism is unmatched.”

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CEO, InnovateTech Solutions

“Partnering with Beegazpacho has been a game-changer for our brand. Their creative ad campaigns and SEO services have boosted our online presence and significantly increased leads and sales. We couldn’t ask for a better partner!”

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Marketing Director, Luxury Home Interiors

“Beegazpacho feels like an extension of our team. Their content marketing and social media expertise have elevated our brand. They listen, adapt, and always deliver on time. We look forward to continuing this partnership.”

— Sarah Williams

Head of Marketing, GreenPlanet Apparel

“Beegazpacho’s data-driven strategies helped us improve our online ads, optimize our website, and enhance branding. We’ve seen great ROI and increased visibility. Their professionalism is unmatched.”

— Arvind Shah

CEO, InnovateTech Solutions

“Partnering with Beegazpacho has been a game-changer for our brand. Their creative ad campaigns and SEO services have boosted our online presence and significantly increased leads and sales. We couldn’t ask for a better partner!”

— Rina Kapoor

Marketing Director, Luxury Home Interiors