NAME

        CL_RFC1123_6_1_3_2_Multicast - Multicast query

VERIFICATION POINTS

        Verify that a NUT transmits correct UDP query with broadcast or multicast address

A server MAY support a UDP query that is delivered using an

IP broadcast or multicast address. However, the Recursion

Desired bit MUST NOT be set in a query that is multicast,

and MUST be ignored by name servers receiving queries via a

broadcast or multicast address. A host that sends broadcast

or multicast DNS queries SHOULD send them only as occasional

probes, caching the IP address(es) it obtains from the

response(s) so it can normally send unicast queries.



Header section format

	                                1  1  1  1  1  1
	  0  1  2  3  4  5  6  7  8  9  0  1  2  3  4  5
	+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
	|                      ID                       |
	+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
	|QR|   Opcode  |AA|TC|RD|RA|   Z    |   RCODE   |
	+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
	|                    QDCOUNT                    |
	+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
	|                    ANCOUNT                    |
	+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
	|                    NSCOUNT                    |
	+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
	|                    ARCOUNT                    |
	+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
	

	QR : query (0)
	Opcode : a standard query(QUERY) (0)
	RD : Must be zero 
	QDCOUNT : 1 
	ANCOUNT : 0 
	NSCOUNT : 0 
	

TARGET

        Client

SYNOPSIS

	CL_RFC1123_6_1_3_2_Multicast.seq [-tooloption ...]: KOI tool option
	See also DNSConfig.pm

INITIALIZATION

• Network Topology

        AP Server1(TN):A.example.com     DNS Server1(TN)
          |3ffe:501:ffff:101::10           |3ffe:501:ffff:101::20
          |192.168.1.10                    |192.168.1.20
          |                                |
Net-y   --+--------+-----------------------+-------- 3ffe:501:ffff:101::/64 
                   |                                 192.168.1/24
                   |
                   |
                 ROUTER1(TN)
                   |3ffe:501:ffff:100::1
                   |192.168.0.1
                   |
Net-z   --+--------+-------------------------------- 3ffe:501:ffff:100::/64 
          |                                          192.168.0/24
        DNS Client1(NUT)
           3ffe:501:ffff:100:XXXX
           192.168.0.10
	

	XXXX: EUI64 address
	

• Setup

	Set the DNS Server1(TN)'s address on NUT as above mentioned Network Topology.
	

• Pre-Sequence

	In order to send the query for A type of AP Server1(TN):A.example.com to the DNS Server1(TN), 
	NUT is configured.
	

TEST PROCEDURE

	This test sequence is following.


    DNS Client1 (NUT)                        DNS Server1 (TN)
        |                                              |
        |----------------------------------------->    |
        |           1. Send standard query             |
        |              *broadcast or multicast         |
        |                                              |
        v                                              v


	1. NUT send standard query with broadcast or multicast to TN.
                  Judgment (Check *1)

Packet Description
	

	  

	    

	      

	      1. Standard query from DNS Client1 (NUT) to DNS Server1 (TN) 
	      
	    
	    

	      
IP Header
	      
Source Address
	      
NUT_NETZ
	    
	    

	      
Destination Address
	      
BRO_MULTI
	    
	    

	      
UDP Header

	      
	      
Src Port

	      
	      
any

	      
	    
	    

	      
Dst Port

	      
	      
53

 	     
	    
 	   

 	     
DNS Header

 	     
 	     
ID
	      
any
	    
	    

	      
QR

	      
	      
0

	      
	    
	    

	      
OPCODE

	      
	      
0

	      
	    
	    

	      
AA

	      
	      
any

	      
	    
	    

	      
TC
	      
0
	    
	    

	      
RD
	      
0
	    
	    

	      
RA

	      
	      
any

	      
	    
	    

	      
Z

	      
	      
any

	      
	    
	    

	      
RCODE

	      
 	     
any

	      
	    
	    

	      
QDCOUNT

	      
	      
1

	      
 	   
	    

	      
ANCOUNT

	      
	      
0

	      
	    
	    

	      
NSCOUNT

	      
	      
0

	      
	    
	    

	      
ARCOUNT

	      
	      
any

	      
	    
	    

	      
DNS Question section

	      
	      
QNAME
	      
A.example.com

	      
	    
	    

	      
QTYPE

	      
	      
A (0x0001)

	      
	    
	    

	      
QCLASS

	      
	      
any

	      
	    
	  
	
NUT_NETZ : DNS Client1(NUT)'s address
BRO_MULTI : broadcast(for IPv4) or multicast(for IPv6) address

JUDGMENT

        1. Standard query for broadcast or multicast  must be based on above Verification Points.

TERMINATION

        If NUT has cache function, clear the cache.

REFERENCE

	RFC1123 Requirements for internet Hosts -- Application and Support
	6.1.3.2 Transport Protocols