fix nameservers A records
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parent
4cf495be14
commit
8901182784
70
xip/xip.go
70
xip/xip.go
@ -19,7 +19,7 @@ type Xip struct {
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}
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type HardcodedRecord struct {
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A *dns.A
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A []*dns.A
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TXT *dns.TXT
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MX []*dns.MX
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CNAME []*dns.CNAME
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@ -31,10 +31,26 @@ var (
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dashedIpV4Regex = regexp.MustCompile(`(?:^|(?:[\w\d])+\.)(((25[0-5]|(2[0-4]|1\d|[1-9]|)\d)\-?\b){4})($|[.-])`)
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hardcodedRecords = map[string]HardcodedRecord{
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"ns.local-ip.sh.": {
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A: &dns.A{A: net.IPv4(137, 66, 38, 214)},
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// record holding ip addresses of ns1 and ns2
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A: []*dns.A{
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{A: net.IPv4(137, 66, 38, 214)},
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{A: net.IPv4(213, 188, 206, 3)},
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},
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},
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"ns1.local-ip.sh.": {
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A: []*dns.A{
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{A: net.IPv4(137, 66, 38, 214)}, // fly.io global ip address
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},
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},
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"ns2.local-ip.sh.": {
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A: []*dns.A{
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{A: net.IPv4(213, 188, 206, 3)}, // fly.io singaporean ip address
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},
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},
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"local-ip.sh.": {
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A: &dns.A{A: net.IPv4(137, 66, 53, 22)},
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A: []*dns.A{
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{A: net.IPv4(137, 66, 53, 22)},
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},
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TXT: &dns.TXT{
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Txt: []string{
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"sl-verification=frudknyqpqlpgzbglkqnsmorfcvxrf",
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@ -69,26 +85,36 @@ var (
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}
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)
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func (xip *Xip) fqdnToA(fqdn string) *dns.A {
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var ipV4Address net.IP
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func (xip *Xip) fqdnToA(fqdn string) []*dns.A {
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if hardcodedRecords[strings.ToLower(fqdn)].A != nil {
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ipV4Address = hardcodedRecords[strings.ToLower(fqdn)].A.A
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var records []*dns.A
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for _, record := range hardcodedRecords[strings.ToLower(fqdn)].A {
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records = append(records, &dns.A{
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Hdr: dns.RR_Header{
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// Ttl: uint32((time.Hour * 24 * 7).Seconds()),
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Ttl: uint32((time.Second * 10).Seconds()),
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Name: fqdn,
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Rrtype: dns.TypeA,
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Class: dns.ClassINET,
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},
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A: record.A,
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})
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}
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return records
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}
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for _, ipV4RE := range []*regexp.Regexp{dashedIpV4Regex, dottedIpV4Regex} {
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if ipV4RE.MatchString(fqdn) {
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match := ipV4RE.FindStringSubmatch(fqdn)[1]
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match = strings.ReplaceAll(match, "-", ".")
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ipV4Address = net.ParseIP(match).To4()
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break
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}
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}
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ipV4Address := net.ParseIP(match).To4()
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if ipV4Address == nil {
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return nil
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}
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return &dns.A{
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return []*dns.A{{
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Hdr: dns.RR_Header{
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// Ttl: uint32((time.Hour * 24 * 7).Seconds()),
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Ttl: uint32((time.Second * 10).Seconds()),
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@ -97,22 +123,28 @@ func (xip *Xip) fqdnToA(fqdn string) *dns.A {
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Class: dns.ClassINET,
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},
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A: ipV4Address,
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}}
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}
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}
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return []*dns.A{}
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}
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func (xip *Xip) handleA(question dns.Question, message *dns.Msg) {
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fqdn := question.Name
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record := xip.fqdnToA(fqdn)
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records := xip.fqdnToA(fqdn)
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if record == nil {
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if len(records) == 0 {
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message.Rcode = dns.RcodeNameError
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message.Ns = append(message.Ns, xip.SOARecord(question))
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return
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}
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for _, record := range records {
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log.Printf("(%s) %s => %s\n", flyRegion, fqdn, record.A)
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message.Answer = append(message.Answer, record)
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}
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}
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func (xip *Xip) handleNS(question dns.Question, message *dns.Msg) {
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fqdn := question.Name
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@ -130,16 +162,18 @@ func (xip *Xip) handleNS(question dns.Question, message *dns.Msg) {
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Ns: ns.Ns,
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})
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additionals = append(additionals, xip.fqdnToA(ns.Ns))
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additionals = append(additionals, xip.fqdnToA(ns.Ns)...)
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}
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log.Println(additionals)
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for _, record := range nameServers {
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message.Answer = append(message.Answer, record)
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}
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for _, record := range additionals {
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message.Extra = append(message.Extra, record)
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}
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// for _, record := range additionals {
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// message.Extra = append(message.Extra, record)
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// }
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}
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func (xip *Xip) handleTXT(question dns.Question, message *dns.Msg) {
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