Add ifcico to DNS query responses

app/Classes/Protocol/DNS.php

@@ -12,6 +12,7 @@ use App\Models\{Address,Domain,Mailer};
 
 /**
  * Respond to DNS queries and provide addresses to FTN nodes.
+ * http://ftsc.org/docs/fts-5004.001
  *
  * This implementation doesnt support EDNS nor DNSSEC.
  *
@@ -180,18 +181,23 @@ final class DNS extends BaseProtocol
 
 				// If this is a SRV record query
 				if ($this->query->type === self::DNS_TYPE_SRV) {
+					if ($labels->skip(1)->first() !== '_tcp')
+						return $this->reply(self::DNS_NAMEERR);
+
 					switch ($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;
 
+						case '_ifcico':
+							$mailer = Mailer::where('name','EMSI')->singleOrFail();
+							break;
+
 						default:
 							return $this->reply(self::DNS_NAMEERR);
 					}
+
+					$labels->shift(2);
 				}
 
 				// First check that it is a query we can answer
@@ -242,8 +248,8 @@ final class DNS extends BaseProtocol
 							return $this->reply(
 								self::DNS_NOERROR,
 								[serialize([
-									0,
-									0,
+									0, // priority
+									1, // weight
 									$xx->pivot->port,
 									$this->domain_split($ao->system->address),
 								]) => self::DNS_TYPE_SRV]);