mokhtar/local-ip.sh
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remove from zone and reduce TTL to test with an actual domain

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m5r 2022-10-29 00:07:09 +02:00
parent 16a757694e
commit 15aee08c3c
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GPG Key ID: 5BC847276DD5DDEA
2 changed files with 34 additions and 25 deletions
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2
main.go
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@ -8,7 +8,7 @@ import (
) )
const ( const (
zone = "my.local-ip.dev." zone = "local-ip.dev."
nameservers = "ns.local-ip.dev." nameservers = "ns.local-ip.dev."
) )

57
xip/xip.go
View File

@ -38,7 +38,8 @@ func (xip *Xip) handleA(question dns.Question, response *dns.Msg) *dns.A {
resource := &dns.A{ resource := &dns.A{
Hdr: dns.RR_Header{ Hdr: dns.RR_Header{
Ttl: uint32((time.Hour * 24 * 7).Seconds()), // Ttl: uint32((time.Hour * 24 * 7).Seconds()),
Ttl: uint32((time.Second * 10).Seconds()),
Name: fqdn, Name: fqdn,
Rrtype: dns.TypeA, Rrtype: dns.TypeA,
Class: dns.ClassINET, Class: dns.ClassINET,
@ -53,35 +54,43 @@ func (xip *Xip) handleA(question dns.Question, response *dns.Msg) *dns.A {
return nil return nil
} }
func (xip *Xip) handleQuery(message *dns.Msg) { func (xip *Xip) SOARecord(question dns.Question) *dns.SOA {
for _, question := range message.Question {
switch question.Qtype {
case dns.TypeA:
record := xip.handleA(question, message)
message.Answer = append(message.Answer, record)
}
}
}
func (xip *Xip) refuseMessage(message *dns.Msg) {
message.MsgHdr.Rcode = dns.RcodeRefused
soa := new(dns.SOA) soa := new(dns.SOA)
soa.Hdr = dns.RR_Header{ soa.Hdr = dns.RR_Header{
Name: "my.local-ip.dev.", Name: question.Name,
Rrtype: dns.TypeSOA, Rrtype: dns.TypeSOA,
Class: dns.ClassINET, Class: dns.ClassINET,
Ttl: uint32((time.Hour * 24 * 7).Seconds()), // Ttl: uint32((time.Hour * 24 * 7).Seconds()),
Ttl: uint32((time.Second * 10).Seconds()),
Rdlength: 0, Rdlength: 0,
} }
soa.Ns = "ns.local-ip.dev." soa.Ns = "ns.local-ip.dev."
soa.Mbox = "admin.local-ip.dev." soa.Mbox = "admin.local-ip.dev."
soa.Serial = 2022102800 soa.Serial = 2022102800
soa.Refresh = uint32((time.Minute * 15).Seconds()) // soa.Refresh = uint32((time.Minute * 15).Seconds())
soa.Retry = uint32((time.Minute * 15).Seconds()) soa.Refresh = uint32((time.Second * 10).Seconds())
soa.Expire = uint32((time.Minute * 30).Seconds()) // soa.Retry = uint32((time.Minute * 15).Seconds())
soa.Minttl = uint32((time.Minute * 5).Seconds()) soa.Retry = uint32((time.Second * 10).Seconds())
message.Ns = append(message.Ns, soa) // soa.Expire = uint32((time.Minute * 30).Seconds())
soa.Expire = uint32((time.Second * 10).Seconds())
// soa.Minttl = uint32((time.Minute * 5).Seconds())
soa.Minttl = uint32((time.Second * 10).Seconds())
return soa
}
func (xip *Xip) handleQuery(message *dns.Msg) {
for _, question := range message.Question {
switch question.Qtype {
case dns.TypeA:
record := xip.handleA(question, message)
if record != nil {
message.Answer = append(message.Answer, record)
} else {
message.Ns = append(message.Ns, xip.SOARecord(question))
}
}
}
} }
func (xip *Xip) handleDnsRequest(response dns.ResponseWriter, request *dns.Msg) { func (xip *Xip) handleDnsRequest(response dns.ResponseWriter, request *dns.Msg) {
@ -96,7 +105,7 @@ func (xip *Xip) handleDnsRequest(response dns.ResponseWriter, request *dns.Msg)
case dns.OpcodeQuery: case dns.OpcodeQuery:
xip.handleQuery(message) xip.handleQuery(message)
default: default:
xip.refuseMessage(message) message.MsgHdr.Rcode = dns.RcodeRefused
} }
response.WriteMsg(message) response.WriteMsg(message)