NAME

        SV_RFC1035_3_1_label_format - Label format

VERIFICATION POINTS

        Verify that a NUT transmits correct standard query for label format

• Domain names in messages are expressed in terms of a sequence of labels. Each label is represented as a one octet length field followed by that number of octets.


• The high order two bits of every length octet must be zero, and the remaining six bits of the length field limit the label to 63 octets or less.

TARGET

        Caching Server

SYNOPSIS

	SV_RFC1035_3_1_label_format.seq [-tooloption ...]: KOI tool option
	See also DNSConfig.pm

INITIALIZATION

Network Topology

                                 . domain
        AP Server1 (TN)          DNS Server2
          |A.example.org           |A.ROOT.NET
          |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
                   |
                   |
                 Router (TN)
                   |3ffe:501:ffff:100::1
                   |192.168.0.1
                   |
                   |
Net-z   --+--------+-----------------+-------- 3ffe:501:ffff:100::/64
          |                          |          192.168.0/24
          |                          |
        DNS Server1 (NUT)          DNS Client1 (TN)
           3ffe:501:ffff:100::XXXX    3ffe:501:ffff:100::20 
           192.168.0.10               192.168.0.20
	

	XXXX: EUI64
	

Setup



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

Configure the Server1's (NUT) zone file to response query from TN.


Example of root server list:


  For IPv4:

.                       3600000         IN      NS      A.ROOT.NET.
A.ROOT.NET.             3600000                 A       192.168.1.20
	

  For IPv6:

.                       3600000         IN      NS      A.ROOT.NET.
A.ROOT.NET.             3600000                 AAAA    3ffe:501:ffff:101::20
	

Example of example.com zone file:


$TTL    86400           ; TTL of 1 day
@ IN SOA NS1.example.com. root.example.com. (
	2005081600	; serial
	3600		; refresh every 1 hr
	900		; retry every 15 min
	604800		; expire after a week
	3600		; Minimum TTL of a 1 hr
)
;
	IN	NS	NS1.example.com.
NS1	IN	A	192.168.0.10
;
	

TEST PROCEDURE

        This test sequence is following.

    DNS Client1 (TN)             DNS Server1 (NUT)                  DNS Server2 (TN)
        |                              |                                 |
        |----------------------------->|                                 |
        | 1. Send standard query       |                                 |
        |  QNAME=A.example.org         |                                 |
        |  QTYPE=A                     |                                 |
        |                              |                                 |
        |                              |-------------------------------->|
        |                              | 2. Recv standard query          |
        |                              |  QNAME=A.example.org            |
        |                              |  QTYPE=A                        |
        |                              |                                 |
        v                              v                                 v

        1. TN send standard query QNAME=A.example.org, QTYPE=A to NUT.
        2. NUT transmits standard query to DNS Server2 (TN: root name server) (Judgment *2)

Packet Description



1st packet.

Standard query from DNS Client1 (TN) to Server1 (NUT)
IP Header	Source Address	CL1_NETZ
	Destination Address	NUT_NETZ
UDP Header	Src Port	2000
	Dst Port	53
DNS Header	ID	0x1000
	QR	0
	OPCODE	0
	AA	0
	TC	0
	RD	1
	RA	0
	Z	0
	RCODE	0
	QDCOUNT	1
	ANCOUNT	0
	NSCOUNT	0
	ARCOUNT	0
DNS Question section	QNAME	A.example.org
	QTYPE	A (0x0001)
	QCLASS	IN (0x0001)



2nd packet.

Standard query from DNS Server1 (NUT) to Server2 (TN)
IP Header	Source Address	NUT_NETZ
	Destination Address	SV2_NETY
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.org
	QTYPE	A (0x0001)
	QCLASS	IN (0x0001)




Exp.


NUT_NETZ	DNS Server1's (NUT) Net-z address
CL1_NETZ	DNS Client1's (TN) Net-z address
SV2_NETY	DNS Server2's (TN) Net-y address
SV3_NETY	DNS Server3's (TN) Net-y address
SV4_NETY	DNS Server4's (TN) Net-y address

JUDGMENT

        2. Standard query must be based on above Verification Points.
           *In DNS Question section, QNAME field must include following data.

        +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
        | 0  0  0  0  0  0  0  1|           a           |
        +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
        | 0  0  0  0  0  1  1  1|           e           |
        +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
        |           x           |           a           |
        +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
        |           m           |           p           |
        +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
        |           l           |           e           |
        +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
        | 0  0  0  0  0  0  1  1|           o           |
        +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
        |           r           |           g           |
        +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+

TERMINATION

        None

REFERENCE

        RFC1035 DOMAIN NAMES - IMPLEMENTATION AND SPECIFICATION
        3.1. Name space definitions