NAME

        SV_RFC3403_4_1_NAPTR_rdata - Resource record of NAPTR type

VERIFICATION POINTS

        Verify that a NUT transmits correct message including NAPTR resource record

A <domain-name> have single NAPTR resource record case.

Header section field has the following value.

QR : 1

QDCOUNT : 1

ANCOUNT : 1

NAPTR RDATA format

       +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
       |                     ORDER                     |
       +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
       |                   PREFERENCE                  |
       +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
       /                     FLAGS                     /
       +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
       /                   SERVICES                    /
       +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
       /                    REGEXP                     /
       +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
       /                  REPLACEMENT                  /
       /                                               /
       +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+

ORDER :	A 16-bit unsigned integer specifying the order in which the NAPTR records MUST be processed in order to accurately represent the ordered list of Rules.
PREFERENCE :	Although it is called "preference" in deference to DNS terminology, this field is equivalent to the Priority value in the DDDS Algorithm. It is a 16-bit unsigned integer that specifies the order in which NAPTR records with equal Order values SHOULD be processed, low numbers being processed before high numbers.
FLAGS :	A <character-string> containing flags to control aspects of the rewriting and interpretation of the fields in the record. Flags are single characters from the set A-Z and 0-9. The case of the alphabetic characters is not significant. The field can be empty
SERVICES :	A <character-string> that specifies the Service Parameters applicable to this this delegation path. It is up to the Application Specification to specify the values found in this field.
REGEXP :	A containing a substitution expression that is applied to the original string held by the client in order to construct the next domain name to lookup.
REPLACEMENT :	A <domain-name> which is the next domain-name to query for depending on the potential values found in the flags field. This field is used when the regular expression is a simple replacement operation. Any value in this field MUST be a fully qualified domain-name. Name compression is not to be used for this field.

TARGET

        Authoritative Server

SYNOPSIS

	SV_RFC3403_4_1_NAPTR_rdata.seq [-tooloption ...]: KOI tool option
	See also DNSConfig.pm

INITIALIZATION

Network Topology

        AP Server1 (TN)
          |3ffe:501:ffff:101::10
          |192.168.1.10
          |
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 
           3ffe:501:ffff:100::10
           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 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
;
A	IN	A	192.168.1.10

Example of 1.1.1.1.0.9.1.8.e164.arpa. domain zone file:

$TTL	86400		; TTL of 1 day
@ IN SOA NS1.example.com. root.example.com. (
	2005081600	; serial
	3600		; refresh after 1 hr
	900		; retry after 15 min
	604800		; expire after 1 week
	3600		; Minimum TTL of 1 hr
)
;
	IN	NS	NS1.example.com.
;
1.0.0.0	IN	NAPTR	100	10	"u"	"sip+E2U"	"!^.*$!sip:info1@example.com!i"	.

TEST PROCEDURE

        This test sequence is following.

    DNS Client1 (TN)                       DNS Server1 (NUT)
        |                                      |
        |------------------------------------->|
        |   1. Send standard query             |
        |      QNAME = 1.0.0.0.1.1.1.1.0.9.1.8.e164.arpa.
        |      QTYPE= NAPTR                    |
        |                                      |
        |<-------------------------------------|
        |   2. Standard query response         |
        |                                      |
        |                                      |
        v                                      v

        1. TN send standard query
           QNAME=1.0.0.0.1.1.1.1.0.9.1.8.e164.arpa.,
           QTYPE=NAPTR to NUT.
        2. NUT reply query response w/ NAPTR resource record to TN (Judgment *2)

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	0
DNS Question section	QNAME	1.0.0.0.1.1.1.1.0.9.1.8.e164.arpa.
	QTYPE	NAPTR (0x0023)
	QCLASS	IN (0x0001)

2nd packet.

Standard query response from DNS Server1 (NUT) to Client (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	1
	TC	0
	RD	0
	RA	0
	Z	ANY
	RCODE	0
	QDCOUNT	1
	ANCOUNT	1
	NSCOUNT	1
	ARCOUNT	1
DNS Question section	QNAME	1.0.0.0.1.1.1.1.0.9.1.8.e164.arpa
	QTYPE	NAPTR (0x0023)
	QCLASS	IN (0x0001)
DNS Answer section	NAME	1.0.0.0.1.1.1.1.0.9.1.8.e164.arpa (Pointer 0xC00C)
	TYPE	NAPTR (0x0023)
	CLASS	IN (0x0001)
	TTL	86400sec
	RDLENGTH	45
	ORDER	100
	PREFERENCE	10
	FLAGS	U
	SERVICES	sip+E2U
	REGEXP	!^.*$!sip:info1@example.com!i
	REPLACEMENT	.
DNS Authority section	NAME	1.1.1.1.0.9.1.8.e164.arpa. (Pointer 0xC014)
	TYPE	NS (0x0002)
	CLASS	IN (0x0001)
	TTL	1 day (86400)
	RDLENGTH	17
	NSDNAME	NS1.example.com
DNS Additional section	NAME	NS1.example.com (Pointer 0xC078)
	TYPE	A (0x0001)
	CLASS	IN (0x0001)
	TTL	1 day (86400)
	RDLENGTH	4
	ADDRESS	192.168.0.10

Exp.

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

JUDGMENT

        2. Received standard query response including NAPTR resource record.

TERMINATION

        None

REFERENCE

        RFC3403 Dynamic Delegation Discovery System (DDDS)
                Part Three: The Domain Name System (DNS) Database
        4. NAPTR RR Format 
        4.1 Packet Format