NAME

        SV_RFC1034_4_3_2_23B46_1 - And QNAME is found in the cache.

VERIFICATION POINTS

        Verify that whether NUT's following behavior.

        Recursion service is avairable but not requested via the RD bit in the query.
        Search the available zones for the zone which is the nearest ancestor to QNAME.
        Such a zone is found. A match take QNAME out of the authoritative data, QNAME 
        has a referral. Copy the NS RRs for the subzone into the authority section of
        the reply. Starting matching down in the cache. And QNAME is found in the cache.
        Copy all RRs attached to it that match QTYPE into the answer section.

TARGET

        Server

SYNOPSIS

	SV_RFC1034_4_3_2_23B46_1.seq [-tooloption ...]: KOI tool option
	See also DNSConfig.pm

INITIALIZATION

Network Topology

        AP Server1 (TN)
          |A.sub.example.com
          |3ffe:501:ffff:101::10
          |192.168.1.10
          |
Net-y   --+--------+-------------------------------------------------------------------- 3ffe:501:ffff:101::/64
                   |                                                                     192.168.1/24
                   |
                   |
                   |                         sub.example.com zone
                 Router (TN)             DNS Server6 (TN)
                   |3ffe:501:ffff:100::1     |NS6.sub.example.com
                   |192.168.0.1              |3ffe:501:ffff:100::30
                   |                         |192.168.0.30
                   |                         |
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.

Enable recursive mode.

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
;
sub	IN	NS	NS6.sub.example.com.
NS6.sub	IN	A	192.168.0.30
	IN	AAAA	3ffe:501:ffff:100::30
;

TEST PROCEDURE

        This test sequence is following.

    DNS Client1 (TN)             DNS Server1 (NUT)                  DNS Server6 (TN)
        |                              |                                 |
        |----------------------------->|                                 |
        | 1. Send standard query       |                                 |
        |  RD = 1                      |                                 |
        |  QNAME = A.sub.example.com   |                                 |
        |  QTYPE = A                   |                                 |
        |                              |                                 |
        |                              |-------------------------------->|
        |                              | 2. Recv standard query          |
        |                              |  QNAME = A.sub.example.com      |
        |                              |  QTYPE = A                      |
        |                              |                                 |
        |                              |<--------------------------------|
        |                              | 3. Send standard query response |
        |                              |  QNAME = A.sub.example.com      |
        |                              |  QTYPE = A                      |
        |                              |  ANSWER Name                    |
        |                              |        = A.sub.example.com      |
        |                              |  ANSWER Type                    |
        |                              |        = A (0x0001)             |
        |                              |  ANSWER Address                 |
        |                              |        = 192.168.1.10           |
        |                              |  AUTHORITY Name                 |
        |                              |        = sub.example.com        |
        |                              |  AUTHORITY Type                 |
        |                              |        = NS (0x0002)            |
        |                              |  AUTHORITY Name Server          |
        |                              |        = NS6.sub.example.com    |
        |                              |                                 |
        |                              |                                 v
        |<-----------------------------|
        | 4. Standard query response   |
        |  AA = 0                      |
        |  RD = 1                      |
        |  RA = 1                      |
        |  QNAME = A.sub.example.com   |
        |  QTYPE = A                   |
        |  ANSWER Name                 |
        |        = A.sub.example.com   |
        |  ANSWER Type                 |
        |        = A (0x0001)          |
        |  ANSWER Address              |
        |        = 192.168.1.10        |
        |  AUTHORITY Name              |
        |        = sub.example.com     |
        |  AUTHORITY Type              |
        |        = NS (0x0002)         |
        |  AUTHORITY Name Server       |
        |        = NS6.sub.example.com |
        |                              |
        |                              |
        |        Wait 5 sec.           |
        |                              |
        |                              |
        |----------------------------->|
        | 5. Send standard query       |
        |  RD = 1                      |
        |  QNAME = A.sub.example.com   |
        |  QTYPE = A                   |
        |                              |
        |<-----------------------------|
        | 6. Standard query response   |
        |  AA = 0                      |
        |  RD = 1                      |
        |  RA = 1                      |
        |  QNAME = A.sub.example.com   |
        |  QTYPE = A                   |
        |  ANSWER Name                 |
        |        = A.sub.example.com   |
        |  ANSWER Type                 |
        |        = A (0x0001)          |
        |  ANSWER Address              |
        |        = 192.168.1.10        |
        |  AUTHORITY Name              |
        |        = sub.example.com     |
        |  AUTHORITY Type              |
        |        = NS (0x0002)         |
        |  AUTHORITY Name Server       |
        |        = NS6.sub.example.com |
        |                              |
        v                              v

        This test sequence is following.

        1. DNS Client1 (TN) send standard query QNAME=A.sub.example.com, QTYPE=A with RD=1 to NUT.
        2. DNS Server1 (NUT) transmits standard query QNAME=A.sub.example.com to DNS Server6 (TN).
        3. DNS Server6 (TN) send standard query response to DNS Server1 (NUT).
        4. DNS Server1 (NUT) transmits standard query response to DNS Client1 (TN). (Judgment *4)
        5. Again, DNS Client1 (TN) send standard query QNAME=A.sub.example.com, QTYPE=A with RD=0 to NUT.
        6. DNS Server1 (NUT) transmits standard query response from cache to DNS Client1 (TN). (Judgment *6)

Packet Description

1st packet.

Standard query from DNS Client1 (TN) to Server1 (NUT)
IP Header	Source Address	CL1_NETZ
IP Header	Destination Address	NUT_NETZ
UDP Header	Src Port	1000
UDP Header	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.sub.example.com
	QTYPE	A (0x0001)
	QCLASS	IN (0x0001)

2nd packet.

Standard query from DNS Client1 (TN) to Server1 (NUT)
IP Header	Source Address	NUT_NETZ
IP Header	Destination Address	SV6_NETZ
UDP Header	Src Port	ANY
UDP Header	Dst Port	53
DNS Header	ID	ANY
	QR	0
	OPCODE	0
	AA	0
	TC	0
	RD	0
	RA	0
	Z	0
	RCODE	0
	QDCOUNT	1
	ANCOUNT	0
	NSCOUNT	0
	ARCOUNT	0
DNS Question section	QNAME	A.sub.example.com
	QTYPE	A (0x0001)
	QCLASS	IN (0x0001)

3rd packet.

Standard query response from DNS Server2 (TN) to Server1 (NUT)
IP Header	Source Address	SV6_NETZ
IP Header	Destination Address	NUT_NETZ
UDP Header	Src Port	53
UDP Header	Dst Port	Value that NUT uses
DNS Header	ID	Value that NUT uses
	QR	1
	OPCODE	0
	AA	1
	TC	0
	RD	0
	RA	0
	Z	0
	RCODE	0
	QDCOUNT	1
	ANCOUNT	0
	NSCOUNT	1
	ARCOUNT	1
DNS Question section	QNAME	A.sub.example.com
	QTYPE	A (0x0001)
	QCLASS	IN (0x0001)
DNS Answer section	NAME	A.sub.example.com (Pointer 0xC00C)
	TYPE	A (0x0001)
	CLASS	IN (0x0001)
	TTL	1 day (86400)
	RDLENGTH	4
	Address	192.168.1.10
DNS Authority section	NAME	sub.example.com (Pointer 0xC00E)
	TYPE	NS (0x0002)
	CLASS	IN (0x0001)
	TTL	1 day (86400)
	RDLENGTH	6
	NSDNAME	NS6.sub.example.com (NS6 + Pointer 0xC00E)

4th packet.

Standard query response from DNS Server1 (NUT) to Client1 (TN)
IP Header	Source Address	NUT_NETZ
IP Header	Destination Address	CL1_NETZ
UDP Header	Src Port	53
UDP Header	Dst Port	1000
DNS Header	ID	0x1000
	QR	1
	OPCODE	0
	AA	0
	TC	0
	RD	1
	RA	1
	Z	ANY
	RCODE	0
	QDCOUNT	1
	ANCOUNT	1
	NSCOUNT	1
	ARCOUNT	0
DNS Question section	QNAME	A.sub.example.com
	QTYPE	A (0x0001)
	QCLASS	IN (0x0001)
*DNS Answer section*	NAME	A.sub.example.com (Pointer 0xC00C)
	TYPE	A (0x0001)
	CLASS	IN (0x0001)
	TTL	1 day (86400)
	RDLENGTH	4
	Address	192.168.1.10
*DNS Authority section*	NAME	sub.example.com (Pointer 0xC00E)
	TYPE	NS (0x0002)
	CLASS	IN (0x0001)
	TTL	1 day (86400)
	RDLENGTH	6
	NSDNAME	NS6.sub.example.com (NS6 + Pointer 0xC00E)

5th packet.

Standard query from DNS Client1 (TN) to Server1 (NUT)
IP Header	Source Address	CL1_NETZ
IP Header	Destination Address	NUT_NETZ
UDP Header	Src Port	1000
UDP Header	Dst Port	53
DNS Header	ID	0x2000
	QR	0
	OPCODE	0
	AA	0
	TC	0
	RD	0
	RA	0
	Z	0
	RCODE	0
	QDCOUNT	1
	ANCOUNT	0
	NSCOUNT	0
	ARCOUNT	0
DNS Question section	QNAME	A.sub.example.com
	QTYPE	A (0x0001)
	QCLASS	IN (0x0001)

6th packet.

Standard query response from DNS Server1 (NUT) to Client1 (TN)
IP Header	Source Address	NUT_NETZ
IP Header	Destination Address	CL1_NETZ
UDP Header	Src Port	53
UDP Header	Dst Port	1000
DNS Header	ID	0x1000
	QR	1
	OPCODE	0
	AA	0
	TC	0
	RD	0
	RA	1
	Z	ANY
	RCODE	0
	QDCOUNT	1
	ANCOUNT	0
	NSCOUNT	1
	ARCOUNT	0
DNS Question section	QNAME	A.sub.example.com
	QTYPE	A (0x0001)
	QCLASS	IN (0x0001)
*DNS Answer section*	NAME	A.sub.example.com (Pointer 0xC00C)
	TYPE	A (0x0001)
	CLASS	IN (0x0001)
	TTL	Less than 1 day (86400)
	RDLENGTH	4
	Address	192.168.1.10
*DNS Authority section*	NAME	sub.example.com (Pointer 0xC00E)
	TYPE	NS (0x0002)
	CLASS	IN (0x0001)
	TTL	Less than 1 day (86400)
	RDLENGTH	6
	NSDNAME	NS6.sub.example.com (NS6 + Pointer 0xC00E)

Exp.

NUT_NETZ	DNS Server1's (NUT) Net-z address
CL1_NETZ	DNS Client1's (TN) Net-z address
SV6_NETZ	DNS Server6's (TN) Net-z address

JUDGMENT

        4. Received standard query response which include answer section and authority section.
        6. Received standard query response which include answer section and authority section from cache.

TERMINATION

        None

REFERENCE

        RFC1034 DOMAIN NAMES - CONCEPTS AND FACILITIES
        4. NAME SERVERS
        4.3.2. Algorithm