package dns
import (
"fmt"
"io/ioutil"
"os"
"path/filepath"
"strings"
"testing"
)
func TestGenerateRangeGuard(t *testing.T) {
tmpdir, err := ioutil.TempDir("", "dns")
if err != nil {
t.Fatalf("could not create tmpdir for test: %v", err)
}
defer os.RemoveAll(tmpdir)
for i := 0; i <= 1; i++ {
path := filepath.Join(tmpdir, fmt.Sprintf("%04d.conf", i))
data := []byte(fmt.Sprintf("dhcp-%04d A 10.0.0.%d", i, i))
if err := ioutil.WriteFile(path, data, 0644); err != nil {
t.Fatalf("could not create tmpfile for test: %v", err)
}
}
var tests = [...]struct {
zone string
fail bool
}{
{`@ IN SOA ns.test. hostmaster.test. ( 1 8h 2h 7d 1d )
$GENERATE 0-1 dhcp-${0,4,d} A 10.0.0.$
`, false},
{`@ IN SOA ns.test. hostmaster.test. ( 1 8h 2h 7d 1d )
$GENERATE 0-1 dhcp-${0,0,x} A 10.0.0.$
`, false},
{`@ IN SOA ns.test. hostmaster.test. ( 1 8h 2h 7d 1d )
$GENERATE 128-129 dhcp-${-128,4,d} A 10.0.0.$
`, false},
{`@ IN SOA ns.test. hostmaster.test. ( 1 8h 2h 7d 1d )
$GENERATE 128-129 dhcp-${-129,4,d} A 10.0.0.$
`, true},
{`@ IN SOA ns.test. hostmaster.test. ( 1 8h 2h 7d 1d )
$GENERATE 0-2 dhcp-${2147483647,4,d} A 10.0.0.$
`, true},
{`@ IN SOA ns.test. hostmaster.test. ( 1 8h 2h 7d 1d )
$GENERATE 0-1 dhcp-${2147483646,4,d} A 10.0.0.$
`, false},
{`@ IN SOA ns.test. hostmaster.test. ( 1 8h 2h 7d 1d )
$GENERATE 0-1/step dhcp-${0,4,d} A 10.0.0.$
`, true},
{`@ IN SOA ns.test. hostmaster.test. ( 1 8h 2h 7d 1d )
$GENERATE 0-1/ dhcp-${0,4,d} A 10.0.0.$
`, true},
{`@ IN SOA ns.test. hostmaster.test. ( 1 8h 2h 7d 1d )
$GENERATE 0-10/2 dhcp-${0,4,d} A 10.0.0.$
`, false},
{`@ IN SOA ns.test. hostmaster.test. ( 1 8h 2h 7d 1d )
$GENERATE 0-1/0 dhcp-${0,4,d} A 10.0.0.$
`, true},
{`@ IN SOA ns.test. hostmaster.test. ( 1 8h 2h 7d 1d )
$GENERATE 0-1 $$INCLUDE ` + tmpdir + string(filepath.Separator) + `${0,4,d}.conf
`, false},
{`@ IN SOA ns.test. hostmaster.test. ( 1 8h 2h 7d 1d )
$GENERATE 0-1 dhcp-${0,4,d} A 10.0.0.$
$GENERATE 0-2 dhcp-${0,4,d} A 10.1.0.$
`, false},
}
for i := range tests {
z := NewZoneParser(strings.NewReader(tests[i].zone), "test.", "test")
z.SetIncludeAllowed(true)
for _, ok := z.Next(); ok; _, ok = z.Next() {
}
err := z.Err()
if err != nil && !tests[i].fail {
t.Errorf("expected \n\n%s\nto be parsed, but got %v", tests[i].zone, err)
} else if err == nil && tests[i].fail {
t.Errorf("expected \n\n%s\nto fail, but got no error", tests[i].zone)
}
}
}
func TestGenerateIncludeDepth(t *testing.T) {
tmpfile, err := ioutil.TempFile("", "dns")
if err != nil {
t.Fatalf("could not create tmpfile for test: %v", err)
}
defer os.Remove(tmpfile.Name())
zone := `@ IN SOA ns.test. hostmaster.test. ( 1 8h 2h 7d 1d )
$GENERATE 0-1 $$INCLUDE ` + tmpfile.Name() + `
`
if _, err := tmpfile.WriteString(zone); err != nil {
t.Fatalf("could not write to tmpfile for test: %v", err)
}
if err := tmpfile.Close(); err != nil {
t.Fatalf("could not close tmpfile for test: %v", err)
}
zp := NewZoneParser(strings.NewReader(zone), ".", tmpfile.Name())
zp.SetIncludeAllowed(true)
for _, ok := zp.Next(); ok; _, ok = zp.Next() {
}
const expected = "too deeply nested $INCLUDE"
if err := zp.Err(); err == nil || !strings.Contains(err.Error(), expected) {
t.Errorf("expected error to include %q, got %v", expected, err)
}
}
func TestGenerateIncludeDisallowed(t *testing.T) {
const zone = `@ IN SOA ns.test. hostmaster.test. ( 1 8h 2h 7d 1d )
$GENERATE 0-1 $$INCLUDE test.conf
`
zp := NewZoneParser(strings.NewReader(zone), ".", "")
for _, ok := zp.Next(); ok; _, ok = zp.Next() {
}
const expected = "$INCLUDE directive not allowed"
if err := zp.Err(); err == nil || !strings.Contains(err.Error(), expected) {
t.Errorf("expected error to include %q, got %v", expected, err)
}
}
func TestGenerateSurfacesErrors(t *testing.T) {
const zone = `@ IN SOA ns.test. hostmaster.test. ( 1 8h 2h 7d 1d )
$GENERATE 0-1 dhcp-${0,4,dd} A 10.0.0.$
`
zp := NewZoneParser(strings.NewReader(zone), ".", "test")
for _, ok := zp.Next(); ok; _, ok = zp.Next() {
}
const expected = `test: dns: bad base in $GENERATE: "${0,4,dd}" at line: 2:20`
if err := zp.Err(); err == nil || err.Error() != expected {
t.Errorf("expected specific error, wanted %q, got %v", expected, err)
}
}
func TestGenerateSurfacesLexerErrors(t *testing.T) {
const zone = `@ IN SOA ns.test. hostmaster.test. ( 1 8h 2h 7d 1d )
$GENERATE 0-1 dhcp-${0,4,d} A 10.0.0.$ )
`
zp := NewZoneParser(strings.NewReader(zone), ".", "test")
for _, ok := zp.Next(); ok; _, ok = zp.Next() {
}
const expected = `test: dns: bad data in $GENERATE directive: "extra closing brace" at line: 2:40`
if err := zp.Err(); err == nil || err.Error() != expected {
t.Errorf("expected specific error, wanted %q, got %v", expected, err)
}
}
func TestGenerateModToPrintf(t *testing.T) {
tests := []struct {
mod string
wantFmt string
wantOffset int64
wantErr bool
}{
{"0,0,d", "%d", 0, false},
{"0,0", "%d", 0, false},
{"0", "%d", 0, false},
{"3,2,d", "%02d", 3, false},
{"3,2", "%02d", 3, false},
{"3", "%d", 3, false},
{"0,0,o", "%o", 0, false},
{"0,0,x", "%x", 0, false},
{"0,0,X", "%X", 0, false},
{"0,0,z", "", 0, true},
{"0,0,0,d", "", 0, true},
{"-100,0,d", "%d", -100, false},
}
for _, test := range tests {
gotFmt, gotOffset, errMsg := modToPrintf(test.mod)
switch {
case errMsg != "" && !test.wantErr:
t.Errorf("modToPrintf(%q) - expected empty-error, but got %v", test.mod, errMsg)
case errMsg == "" && test.wantErr:
t.Errorf("modToPrintf(%q) - expected error, but got empty-error", test.mod)
case gotFmt != test.wantFmt:
t.Errorf("modToPrintf(%q) - expected format %q, but got %q", test.mod, test.wantFmt, gotFmt)
case gotOffset != test.wantOffset:
t.Errorf("modToPrintf(%q) - expected offset %d, but got %d", test.mod, test.wantOffset, gotOffset)
}
}
}
func BenchmarkGenerate(b *testing.B) {
const zone = `@ IN SOA ns.test. hostmaster.test. ( 1 8h 2h 7d 1d )
$GENERATE 32-158 dhcp-${-32,4,d} A 10.0.0.$
`
for n := 0; n < b.N; n++ {
zp := NewZoneParser(strings.NewReader(zone), ".", "")
for _, ok := zp.Next(); ok; _, ok = zp.Next() {
}
if err := zp.Err(); err != nil {
b.Fatal(err)
}
}
}
func TestCrasherString(t *testing.T) {
tests := []struct {
in string
err string
}{
{"$GENERATE 0-300103\"$$GENERATE 2-2", "bad range in $GENERATE"},
{"$GENERATE 0-5414137360", "bad range in $GENERATE"},
{"$GENERATE 11522-3668518066406258", "bad range in $GENERATE"},
{"$GENERATE 0-200\"(;00000000000000\n$$GENERATE 0-0", "dns: garbage after $GENERATE range: \"\\\"\" at line: 1:16"},
{"$GENERATE 6-2048 $$GENERATE 6-036160 $$$$ORIGIN \\$", `dns: nested $GENERATE directive not allowed: "6-036160" at line: 1:19`},
}
for _, tc := range tests {
t.Run(tc.in, func(t *testing.T) {
_, err := NewRR(tc.in)
if err == nil {
t.Errorf("Expecting error for crasher line %s", tc.in)
}
if !strings.Contains(err.Error(), tc.err) {
t.Errorf("Expecting error %s, got %s", tc.err, err.Error())
}
})
}
}