mokhtar/local-ip.sh
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fix nameservers A records

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m5r 2022-10-29 23:59:50 +02:00
parent 4cf495be14
commit 8901182784
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GPG Key ID: 5BC847276DD5DDEA
1 changed files with 64 additions and 30 deletions
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94
xip/xip.go
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@ -19,7 +19,7 @@ type Xip struct {
}
type HardcodedRecord struct {
A *dns.A
A []*dns.A
TXT *dns.TXT
MX []*dns.MX
CNAME []*dns.CNAME
@ -31,10 +31,26 @@ var (
dashedIpV4Regex = regexp.MustCompile(`(?:^|(?:[\w\d])+\.)(((25[0-5]|(2[0-4]|1\d|[1-9]|)\d)\-?\b){4})($|[.-])`)
hardcodedRecords = map[string]HardcodedRecord{
"ns.local-ip.sh.": {
A: &dns.A{A: net.IPv4(137, 66, 38, 214)},
// record holding ip addresses of ns1 and ns2
A: []*dns.A{
{A: net.IPv4(137, 66, 38, 214)},
{A: net.IPv4(213, 188, 206, 3)},
},
},
"ns1.local-ip.sh.": {
A: []*dns.A{
{A: net.IPv4(137, 66, 38, 214)}, // fly.io global ip address
},
},
"ns2.local-ip.sh.": {
A: []*dns.A{
{A: net.IPv4(213, 188, 206, 3)}, // fly.io singaporean ip address
},
},
"local-ip.sh.": {
A: &dns.A{A: net.IPv4(137, 66, 53, 22)},
A: []*dns.A{
{A: net.IPv4(137, 66, 53, 22)},
},
TXT: &dns.TXT{
Txt: []string{
"sl-verification=frudknyqpqlpgzbglkqnsmorfcvxrf",
@ -69,49 +85,65 @@ var (
}
)
func (xip *Xip) fqdnToA(fqdn string) *dns.A {
var ipV4Address net.IP
func (xip *Xip) fqdnToA(fqdn string) []*dns.A {
if hardcodedRecords[strings.ToLower(fqdn)].A != nil {
ipV4Address = hardcodedRecords[strings.ToLower(fqdn)].A.A
var records []*dns.A
for _, record := range hardcodedRecords[strings.ToLower(fqdn)].A {
records = append(records, &dns.A{
Hdr: dns.RR_Header{
// Ttl: uint32((time.Hour * 24 * 7).Seconds()),
Ttl: uint32((time.Second * 10).Seconds()),
Name: fqdn,
Rrtype: dns.TypeA,
Class: dns.ClassINET,
},
A: record.A,
})
}
return records
}
for _, ipV4RE := range []*regexp.Regexp{dashedIpV4Regex, dottedIpV4Regex} {
if ipV4RE.MatchString(fqdn) {
match := ipV4RE.FindStringSubmatch(fqdn)[1]
match = strings.ReplaceAll(match, "-", ".")
ipV4Address = net.ParseIP(match).To4()
break
ipV4Address := net.ParseIP(match).To4()
if ipV4Address == nil {
return nil
}
return []*dns.A{{
Hdr: dns.RR_Header{
// Ttl: uint32((time.Hour * 24 * 7).Seconds()),
Ttl: uint32((time.Second * 10).Seconds()),
Name: fqdn,
Rrtype: dns.TypeA,
Class: dns.ClassINET,
},
A: ipV4Address,
}}
}
}
if ipV4Address == nil {
return nil
}
return &dns.A{
Hdr: dns.RR_Header{
// Ttl: uint32((time.Hour * 24 * 7).Seconds()),
Ttl: uint32((time.Second * 10).Seconds()),
Name: fqdn,
Rrtype: dns.TypeA,
Class: dns.ClassINET,
},
A: ipV4Address,
}
return []*dns.A{}
}
func (xip *Xip) handleA(question dns.Question, message *dns.Msg) {
fqdn := question.Name
record := xip.fqdnToA(fqdn)
records := xip.fqdnToA(fqdn)
if record == nil {
if len(records) == 0 {
message.Rcode = dns.RcodeNameError
message.Ns = append(message.Ns, xip.SOARecord(question))
return
}
log.Printf("(%s) %s => %s\n", flyRegion, fqdn, record.A)
message.Answer = append(message.Answer, record)
for _, record := range records {
log.Printf("(%s) %s => %s\n", flyRegion, fqdn, record.A)
message.Answer = append(message.Answer, record)
}
}
func (xip *Xip) handleNS(question dns.Question, message *dns.Msg) {
@ -130,16 +162,18 @@ func (xip *Xip) handleNS(question dns.Question, message *dns.Msg) {
Ns: ns.Ns,
})
additionals = append(additionals, xip.fqdnToA(ns.Ns))
additionals = append(additionals, xip.fqdnToA(ns.Ns)...)
}
log.Println(additionals)
for _, record := range nameServers {
message.Answer = append(message.Answer, record)
}
for _, record := range additionals {
message.Extra = append(message.Extra, record)
}
// for _, record := range additionals {
// message.Extra = append(message.Extra, record)
// }
}
func (xip *Xip) handleTXT(question dns.Question, message *dns.Msg) {