NAME

        SV_RFC2671_4_1_OPT_pseudo_RR_recursive - OPT pseudo-RR (recursive)

VERIFICATION POINTS

        Verify that a NUT transmits correct message including OPT pseudo-RR

Query type AAAA.

Header section field has the following value.

QR : 0

QDCOUNT : 1

ANCOUNT : 0

NSCOUNT : 0

ARCOUNT : ANY

Question section format

                                1  1  1  1  1  1
  0  1  2  3  4  5  6  7  8  9  0  1  2  3  4  5
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
|                                               |
/                     QNAME                     /
/                                               /
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
|                     QTYPE                     |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
|                     QCLASS                    |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+

QNAME : A.example.org

QTYPE : AAAA (0x001C)

QCLASS : IN (0x0001)

TARGET

        Caching Server

SYNOPSIS

	SV_RFC2671_4_1_OPT_pseudo_RR_recursive.seq [-tooloption ...]: KOI tool option
	See also DNSConfig.pm

INITIALIZATION

Network Topology

        AP Server1 (TN)
          |A.example.org
          |3ffe:501:ffff:101::10-3ffe:501:ffff:101::41
          |192.168.1.10
          |                      . domain                 org domain               example.org domain
          |                      DNS Server2              DNS Server3              DNS Server4
          |                        |A.ROOT.NET              |NS3.example.org         |NS4.example.org
          |                        |3ffe:501:ffff:101::20   |3ffe:501:ffff:101::30   |3ffe:501:ffff:101::40 
          |                        |                        |                        |
          |                        |                        |                        |
          |                        |192.168.1.20            |192.168.1.30            |192.168.1.40
          |                        |                        |                        |
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.

Set the DNS Server1's (NUT) EDNS UDP size to 1024.

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.
                                                                        <--------- TN ------------>
    DNS Client1 (TN)             DNS Server1 (NUT)                  DNS Server2 DNS Server3 DNS Server4
        |                              |                                 |           |           |
        |----------------------------->|                                 |           |           |
        | 1. Send standard query       |                                 |           |           |
        |  QNAME=A.example.org         |                                 |           |           |
        |  QTYPE=AAAA                  |                                 |           |           |
        |  ADDITIONAL UDP payload size |                                 |           |           |
        |   = 1024                     |-------------------------------->|           |           |
        |                              | 2. Send standard query          |           |           |
        |                              |  QNAME=A.example.org            |           |           |
        |                              |  QTYPE=AAAA                     |           |           |
        |                              |  ADDITIONAL UDP payload size    |           |           |
        |                              |   = 1024                        |           |           |
        |                              |                                 |           |           |
        |                              |<--------------------------------|           |           |
        |                              | 3. Send standard response       |           |           |
        |                              |  QNAME=A.example.org            |           |           |
        |                              |  QTYPE=AAAA                     |           |           |
        |                              |  AUTHORITY Name=org             |           |           |
        |                              |  AUTHORITY Name Server          |           |           |
        |                              |            =NS3.example.org     |           |           |
        |                              |  ADDITIONAL Name=NS3.example.org|           |           |
        |                              |  ADDITIONAL Address=192.168.1.30|           |           |
        |                              |  ADDITIONAL UDP payload size    |           |           |
        |                              |   = 1024                        |           |           |
        |                              |                                 v           |           |
        |                              |                                             |           |
        |                              |-------------------------------------------->|           |
        |                              |             4. Send standard query          |           |
        |                              |              QNAME=A.example.org            |           |
        |                              |              QTYPE=AAAA                     |           |
        |                              |              ADDITIONAL UDP payload size    |           |
        |                              |               = 1024                        |           |
        |                              |                                             |           |
        |                              |<--------------------------------------------|           |
        |                              |             5. Send standard response       |           |
        |                              |              QNAME=A.example.org            |           |
        |                              |              QTYPE=AAAA                     |           |
        |                              |              AUTHORITY Name=example.org     |           |
        |                              |              AUTHORITY Name Server          |           |
        |                              |                     = NS4.example.org       |           |
        |                              |              ADDITIONAL Name                |           |
        |                              |                     = NS4.example.org       |           |
        |                              |              ADDITIONAL Address             |           |
        |                              |                     = 192.168.1.40          |           |
        |                              |              ADDITIONAL UDP payload size    |           |
        |                              |               = 1024                        |           |
        |                              |                                             v           |
        |                              |                                                         |
        |                              |-------------------------------------------------------->|
        |                              |                          6. Send standard query         |
        |                              |                           QNAME=A.example.org           |
        |                              |                           QTYPE=AAAA                    |
        |                              |                           ADDITIONAL UDP payload size   |
        |                              |                            = 1024                       |
        |                              |                                                         |
        |                              |<--------------------------------------------------------|
        |                              |                          7. Send standard response      |
        |                              |                           QNAME=A.example.org           |
        |                              |                           QTYPE=AAAA                    |
        |                              |                           ANSWER Name=A.example.org     |
        |                              |                           ANSWER Address                |
        |                              |                               = 3ffe:501:ffff:101::10   |
        |                              |                            ...                          |
        |                              |                           ANSWER Address                |
        |                              |                               = 3ffe:501:ffff:101::41   |
        |                              |                           AUTHORITY Name=example.org    |
        |                              |                           AUTHORITY Name Server         |
        |                              |                               = NS4.example.org         |
        |                              |                           ADDITIONAL Name               |
        |                              |                               = NS4.example.org         |
        |                              |                           ADDITIONAL Address            |
        |                              |                               = 192.168.1.40            |
        |                              |                           ADDITIONAL UDP payload size   |
        |                              |                            = 1024                       |
        |<-----------------------------|                                                         v
        | 8. Standard query response   |
        |  QNAME=A.example.org         |
        |  QTYPE=AAAA                  |
        |  ANSWER Name=A.example.org   |
        |  ANSWER Address              |
        |      = 3ffe:501:ffff:101::10 |
        |   ...                        |
        |  ANSWER Address              |
        |      = 3ffe:501:ffff:101::42 |
        |  AUTHORITY Name=example.org  |
        |  AUTHORITY Name Server       |
        |            =NS4.example.org  |
        |  ADDITIONAL UDP payload size |
        |   = 1024                     |
        v                              v

        1. TN send standard query QNAME=A.example.org, QTYPE=AAAA to NUT.
        2. NUT transmits standard query to DNS Server2 (TN: root name server) (Judgment *2)
        3. TN send query response to NUT w/ AUTHORITY Name=org, AUTHORITY Name Server=NS3.example.org.
        4. NUT transmits standard query QNAME=A.example.org, QTYPE=AAAA DNS Server3 (TN: NS3.example.org) (Judgment *4)
        5. TN send query response to NUT w/ AUTHORITY Name=example.org, AUTHORITY Name Server=NS4.example.org.
        6. NUT transmits standard query QNAME=A.example.org, QTYPE=AAAA DNS Server4 (TN: NS4.example.org) (Judgment *6)
        7. TN send query response to ANSWER Name=A.example.org, ANSWER Address=3ffe:501:ffff:101::10-3ffe:501:ffff:101::10 to NUT.
        8. NUT transmits query response to DNS Client1 (TN) (Judgment *8)

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	2000
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	1
DNS Question section	QNAME	A.example.org
	QTYPE	AAAA (0x001C)
	QCLASS	IN (0x0001)
DNS Additional section	NAME	empty (root domain)
	TYPE	OPT (0x0029)
	CLASS	1024
	EXTENDED-RCODE	0
	VERSION	0
	Z	0
	RDLENGTH	0

2nd packet.

Standard query from DNS Server1 (NUT) to Server2 (TN)
IP Header	Source Address	NUT_NETZ
IP Header	Destination Address	SV2_NETY
UDP Header	Src Port	ANY
UDP Header	Dst Port	53
DNS Header	ID	ANY
	QR	0
	OPCODE	0
	AA	ANY
	TC	0
	RD	0
	RA	0
	Z	0
	AD	0
	CD	1
	RCODE	0
	QDCOUNT	1
	ANCOUNT	0
	NSCOUNT	0
	ARCOUNT	ANY
DNS Question section	QNAME	A.example.org
	QTYPE	AAAA (0x001C)
	QCLASS	IN (0x0001)
DNS Additional section	NAME	empty (root domain)
	TYPE	OPT (0x0029)
	CLASS	1024
	EXTENDED-RCODE	0
	VERSION	0
	Z	0
	RDLENGTH	0

3rd packet.

Standard query response from DNS Server2 (TN) to Server1 (NUT)
IP Header	Source Address	SV2_NETY
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	0
	TC	0
	RD	0
	RA	0
	Z	0
	RCODE	0
	QDCOUNT	1
	ANCOUNT	0
	NSCOUNT	1
	ARCOUNT	2
DNS Question section	QNAME	A.example.org
	QTYPE	AAAA (0x001C)
	QCLASS	IN (0x0001)
DNS Authority section	NAME	org (Pointer 0xC016)
	TYPE	NS (0x0002)
	CLASS	IN (0x0001)
	TTL	1 day (86400)
	RDLENGTH	6
	NSDNAME	NS3.example.org.
DNS Additional section	NAME	NS3.example.org. (Pointer 0xC02B)
	TYPE	A (0x0001)
	CLASS	IN (0x0001)
	TTL	1 day (86400)
	RDLENGTH	4
	ADDRESS	192.168.1.30
DNS Additional section	NAME	empty (root domain)
	TYPE	OPT (0x0029)
	CLASS	1024
	EXTENDED-RCODE	0
	VERSION	0
	Z	0
	RDLENGTH	0

4th packet.

Standard query from DNS Server1 (NUT) to Server3 (TN)
IP Header	Source Address	NUT_NETZ
IP Header	Destination Address	SV3_NETY
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
	AD	0
	CD	1
	RCODE	0
	QDCOUNT	1
	ANCOUNT	0
	NSCOUNT	0
	ARCOUNT	ANY
DNS Question section	QNAME	A.example.org
	QTYPE	AAAA (0x001C)
	QCLASS	IN (0x0001)
DNS Additional section	NAME	empty (root domain)
	TYPE	OPT (0x0029)
	CLASS	1024
	EXTENDED-RCODE	0
	VERSION	0
	Z	0
	RDLENGTH	0

5th packet.

Standard query response from DNS Server3 (TN) to Server1 (NUT)
IP Header	Source Address	SV3_NETY
IP Header	Destination Address	NUT_NETZ
UDP Header	Src Port	Value that NUT uses
UDP Header	Dst Port	53
DNS Header	ID	Value that NUT uses
	QR	1
	OPCODE	0
	AA	0
	TC	0
	RD	0
	RA	0
	Z	0
	RCODE	0
	QDCOUNT	1
	ANCOUNT	0
	NSCOUNT	1
	ARCOUNT	2
DNS Question section	QNAME	A.example.org
	QTYPE	AAAA (0x001C)
	QCLASS	IN (0x0001)
DNS Authority section	NAME	example.org (Pointer 0xC00E)
	TYPE	NS (0x0002)
	CLASS	IN (0x0001)
	TTL	1 day (86400)
	RDLENGTH	6
	NSDNAME	NS4.example.org (NS4 + Pointer 0xC00E)
DNS Additional section	NAME	NS4.example.org (Pointer 0xC02B)
	TYPE	A (0x0001)
	CLASS	IN (0x0001)
	TTL	1 day (86400)
	RDLENGTH	4
	ADDRESS	192.168.1.40
DNS Additional section	NAME	empty (root domain)
	TYPE	OPT (0x0029)
	CLASS	1024
	EXTENDED-RCODE	0
	VERSION	0
	Z	0
	RDLENGTH	0

6th packet.

Standard query from DNS Server1 (NUT) to Server4 (TN)
IP Header	Source Address	NUT_NETZ
IP Header	Destination Address	SV4_NETY
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
	AD	0
	CD	1
	RCODE	0
	QDCOUNT	1
	ANCOUNT	0
	NSCOUNT	0
	ARCOUNT	ANY
DNS Question section	QNAME	A.example.org
	QTYPE	AAAA (0x001C)
	QCLASS	IN (0x0001)
DNS Additional section	NAME	empty (root domain)
	TYPE	OPT (0x0029)
	CLASS	1024
	EXTENDED-RCODE	0
	VERSION	0
	Z	0
	RDLENGTH	0

7th packet.

Standard query response from DNS Server4 (TN) to Server1 (NUT)
IP Header	Source Address	SV4_NETY
IP Header	Destination Address	NUT_NETZ
UDP Header	Src Port	Value that NUT uses
UDP Header	Dst Port	53
DNS Header	ID	Value that NUT uses
	QR	1
	OPCODE	0
	AA	1
	TC	0
	RD	0
	RA	1
	Z	0
	RCODE	0
	QDCOUNT	1
	ANCOUNT	32
	NSCOUNT	1
	ARCOUNT	2
DNS Question section	QNAME	A.example.org
	QTYPE	AAAA (0x001C)
	QCLASS	IN (0x0001)
DNS Answer section	NAME	A.example.org (Pointer 0xC00C)
	TYPE	AAAA (0x001C)
	CLASS	IN (0x0001)
	TTL	1 day (86400)
	RDLENGTH	16
	ADDRESS	3ffe:501:ffff:101::10
...	...	...
DNS Answer section	NAME	A.example.com (Pointer 0xC00C)
	TYPE	AAAA (0x001C)
	CLASS	IN (0x0001)
	TTL	1 day (86400)
	RDLENGTH	16
	ADDRESS	3ffe:501:ffff:101::41
DNS Authority section	NAME	example.org (Pointer 0xC00E)
	TYPE	NS (0x0002)
	CLASS	IN (0x0001)
	TTL	1 day (86400)
	RDLENGTH	6
	NSDNAME	NS4.example.org (NS4 + Pointer 0xC00E)
DNS Additional section	NAME	NS4.example.org (Pointer 0xC3AB)
	TYPE	A (0x0001)
	CLASS	IN (0x0001)
	TTL	1 day (86400)
	RDLENGTH	4
	ADDRESS	192.168.1.40
DNS Additional section	NAME	empty (root domain)
	TYPE	OPT (0x0029)
	CLASS	1024
	EXTENDED-RCODE	0
	VERSION	0
	Z	0
	RDLENGTH	0

8th 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	2000
DNS Header	ID	0x1000
	QR	1
	OPCODE	0
	AA	0
	TC	0
	RD	1
	RA	1
	Z	0
	RCODE	0
	QDCOUNT	1
	ANCOUNT	32
	NSCOUNT	1
	ARCOUNT	2
DNS Question section	QNAME	A.example.org
	QTYPE	AAAA (0x001C)
	QCLASS	IN (0x0001)
DNS Answer section	NAME	A.example.org (Pointer 0xC00C)
	TYPE	AAAA (0x001C)
	CLASS	IN (0x0001)
	TTL	1 day (86400)
	RDLENGTH	16
	ADDRESS	3ffe:501:ffff:101::10
...	...	...
DNS Answer section	NAME	A.example.com (Pointer 0xC00C)
	TYPE	AAAA (0x001C)
	CLASS	IN (0x0001)
	TTL	1 day (86400)
	RDLENGTH	16
	ADDRESS	3ffe:501:ffff:101::41
DNS Authority section	NAME	example.org (Pointer 0xC00E)
	TYPE	NS (0x0002)
	CLASS	IN (0x0001)
	TTL	1 day (86400)
	RDLENGTH	6
	NSDNAME	NS4.example.org (NS4 + Pointer 0xC00E)
DNS Additional section	NAME	NS4.example.org (Pointer 0xC3AB)
	TYPE	A (0x0001)
	CLASS	IN (0x0001)
	TTL	1 day (86400)
	RDLENGTH	4
	ADDRESS	192.168.1.40
DNS Additional section	NAME	empty (root domain)
	TYPE	OPT (0x0029)
	CLASS	1024
	EXTENDED-RCODE	0
	VERSION	0
	Z	0
	RDLENGTH	0

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. Received standard query including QNAME=A.example.org, QTYPE=AAAA w/ OPT pseudo-RR.
        4. Received standard query including QNAME=A.example.org, QTYPE=AAAA w/ OPT pseudo-RR.
        6. Received standard query including QNAME=A.example.org, QTYPE=AAAA w/ OPT pseudo-RR.
        8. Received standard query response including correct address in the ADDRESS field w/ OPT pseudo-RR.

TERMINATION

        None

REFERENCE

        RFC1034 DOMAIN NAMES - CONCEPTS AND FACILITIES
        3.6 Resource Records

        RFC1035 DOMAIN NAMES - IMPLEMENTATION AND SPECIFICATION
        3.2.1 Format

        RFC 2671 EDNS0
        4. OPT pseudo-RR