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DNS server now responds to SRV and TXT records

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This commit is contained in:
Deon George 2023-10-03 23:15:21 +11:00
parent 073d95f605
commit 62f0c1a909
1 changed files with 57 additions and 4 deletions
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55
app/Classes/Protocol/DNS.php
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@ -8,7 +8,7 @@ use Illuminate\Support\Str;
use App\Classes\Protocol as BaseProtocol;
use App\Classes\Sock\SocketClient;
use App\Http\Controllers\DomainController;
use App\Models\{Address,Domain};
use App\Models\{Address,Domain,Mailer};
/**
* Respond to DNS queries and provide addresses to FTN nodes.
@ -164,9 +164,28 @@ final class DNS extends BaseProtocol
case self::DNS_TYPE_CNAME:
case self::DNS_TYPE_A:
case self::DNS_TYPE_AAAA:
case self::DNS_TYPE_SRV:
case self::DNS_TYPE_TXT:
Log::info(sprintf('%s:= Looking for record [%s] for [%s]',self::LOGKEY,$this->query->type,$this->query->domain));
$labels = clone($this->query->labels);
$mailer = '';
// If this is a SRV record query
if ($this->query->type === self::DNS_TYPE_SRV) {
switch ($labels->first()) {
case '_binkp':
if ($labels->skip(1)->first() !== '_tcp')
return $this->reply(self::DNS_NAMEERR);
$labels->shift(2);
$mailer = Mailer::where('name','BINKP')->singleOrFail();
break;
default:
return $this->reply(self::DNS_NAMEERR);
}
}
// First check that it is a query we can answer
// First label should be p.. or f..
@ -207,10 +226,34 @@ final class DNS extends BaseProtocol
Log::info(sprintf('%s:= Returning [%s] for DNS query [%s]',self::LOGKEY,$ao->system->address,$ao->ftn));
switch ($this->query->type) {
case self::DNS_TYPE_SRV:
if ($xx=$ao->system->mailers->where('id',$mailer->id)->pop()) {
return $this->reply(
self::DNS_NOERROR,
[serialize([
0,
0,
$xx->pivot->port,
$this->domain_split($ao->system->address),
]) => self::DNS_TYPE_SRV]);
} else {
return $this->nameerr();
}
case self::DNS_TYPE_TXT:
return $this->reply(
self::DNS_NOERROR,
[serialize($ao->system->name) => self::DNS_TYPE_TXT]);
default:
return $this->reply(
self::DNS_NOERROR,
[serialize($this->domain_split($ao->system->address)) => self::DNS_TYPE_CNAME]);
}
// Other attributes return NOTIMPL
default:
Log::error(sprintf('%s:! We dont support DNS query types [%d]',self::LOGKEY,$this->query->type));
@ -378,6 +421,16 @@ final class DNS extends BaseProtocol
$a .= pack('NNNNN',$ars[2],$ars[3],$ars[4],$ars[5],$ars[6]);
break;
case self::DNS_TYPE_SRV:
$a .= pack('nnn',$ars[0],$ars[1],$ars[2]);
$a .= $ars[3];
break;
case self::DNS_TYPE_TXT:
$a .= pack('C',strlen($ars)).$ars;
break;
}
$reply .= pack('n',strlen($a)).$a;