NAME

        SV_RFC3404_4_3_NAPTR_flag_S - Flag in NAPTR resource record (S flag)

VERIFICATION POINTS

        Verify that a NUT transmits correct message including NAPTR resource record with S flag

NAPTR RDATA field

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

Flags
At this time only four flags, "S", "A", "U", and "P", are defined. The "S", "A" and "U" flags are for a terminal lookup. This means that the Rule is the last one and that the flag determines what the next stage should be.

TARGET

        Authoritative Server

SYNOPSIS

	SV_RFC3404_4_3_NAPTR_flag_S.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.
;
        IN NAPTR 100  50  "S"    "http+N2L+N2C+N2R"  ""   _http._tcp.example.com.
;
_http._tcp      IN      SRV     10      20      80      www.example.com.
;
NS1	IN	A	192.168.0.10
;
WWW	IN	A	192.168.1.10

Example of cid.urn.arpa. domain zone file:

$TTL	86400		; TTL of 1 day
@ IN SOA NS1.example.com. root.example.com. (
	2005081600	; serial
	3600		; refresh after 1 hr
	900		; retry after 15 min
	604800		; expire after 1 week
	3600		; Minimum TTL of 1 hr
)
;
	IN	NS	NS1.example.com.
;
cid.urn.arpa. IN NAPTR 100 10 "" ""  "!^urn:cid:.+@([^\\.]+\\.)(.*)$!\\2!i" .

TEST PROCEDURE

        This test sequence is following.

    DNS Client1 (TN)                       DNS Server1 (NUT)
        |                                      |
        |------------------------------------->|
        |   1. Send standard query             |
        |      QNAME = cid.urn.arpa.           |
        |      QTYPE= NAPTR                    |
        |                                      |
        |<-------------------------------------|
        |   2. Standard query response         |
        |                                      |
        |------------------------------------->|
        |   3. Send standard query             |
        |      QNAME = example.com.            |
        |      QTYPE= NAPTR                    |
        |                                      |
        |<-------------------------------------|
        |   4. Standard query response         |
        |                                      |
        |------------------------------------->|
        |   5. Send standard query             |
        |      QNAME = _http._tcp.example.com. |
        |      QTYPE= SRV                      |
        |                                      |
        |<-------------------------------------|
        |   6. Standard query response         |
        |                                      |
        |                                      |
        v                                      v

        1. TN send standard query
           QNAME=cid.urn.arpa.,
           QTYPE=NAPTR to NUT.
        2. NUT reply query response w/ NAPTR resource record to TN (Judgment *2)
        3. TN send standard query
           QNAME=example.com.,
           QTYPE=NAPTR to NUT.
        4. NUT reply query response w/ NAPTR resource record to TN (Judgment *4)
        5. TN send standard query
           QNAME=_http._tcp.example.com.,
           QTYPE=SRV to NUT.
        6. NUT reply query response w/ SRV resource record to 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	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	cid.urn.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	cid.urn.arpa.
	QTYPE	NAPTR (0x0023)
	QCLASS	IN (0x0001)
DNS Answer section	NAME	cid.urn.arpa. (Pointer 0xC00C)
	TYPE	NAPTR (0x0023)
	CLASS	IN (0x0001)
	TTL	86400sec
	RDLENGTH	41
	ORDER	100
	PREFERENCE	10
	FLAGS
	SERVICES
	REGEXP	!^urn:cid:.+@([^\.]+\.)(.*)$!\2!i
	REPLACEMENT	.
DNS Authority section	NAME	cid.urn.arpa. (Pointer 0xC00C)
	TYPE	NS (0x0002)
	CLASS	IN (0x0001)
	TTL	1 day (86400)
	RDLENGTH	17
	NSDNAME	NS1.example.com
DNS Additional section	NAME	NS1.example.com (Pointer 0xC05F)
	TYPE	A (0x0001)
	CLASS	IN (0x0001)
	TTL	1 day (86400)
	RDLENGTH	4
	ADDRESS	192.168.0.10

3rd 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	0x1001
	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	example.com.
	QTYPE	NAPTR (0x0023)
	QCLASS	IN (0x0001)

4th 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	0x1001
	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	example.com
	QTYPE	NAPTR (0x0023)
	QCLASS	IN (0x0001)
DNS Answer section	NAME	example.com. (Pointer 0xC00C)
	TYPE	NAPTR (0x0023)
	CLASS	IN (0x0001)
	TTL	86400sec
	RDLENGTH	48
	ORDER	100
	PREFERENCE	50
	FLAGS	S
	SERVICES	http+N2L+N2C+N2R
	REGEXP
	REPLACEMENT	_http._tcp.example.com.
DNS Authority section	NAME	example.com (Pointer 0xC00C)
	TYPE	NS (0x0002)
	CLASS	IN (0x0001)
	TTL	1 day (86400)
	RDLENGTH	6
	NSDNAME	NS1.example.com (NS1 + Pointer 0xC00C)
DNS Additional section	NAME	NS1.example.com (Pointer 0xC065)
	TYPE	A (0x0001)
	CLASS	IN (0x0001)
	TTL	1 day (86400)
	RDLENGTH	4
	ADDRESS	192.168.0.10

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	2000
UDP Header	Dst Port	53
DNS Header	ID	0x1002
	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	_http._tcp.example.com.
	QTYPE	SRV (0x0021)
	QCLASS	IN (0x0001)

6th 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	0x1002
	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	_http._tcp.example.com.
	QTYPE	SRV (0x0021)
	QCLASS	IN (0x0001)
DNS Answer section	NAME	_http._tcp.example.com. (Pointer 0xC00C)
	TYPE	SRV (0x0021)
	CLASS	IN (0x0001)
	TTL	86400sec
	RDLENGTH	23
	Priority	10
	Weight	20
	Port	80
	Target	www.example.com.
DNS Authority section	NAME	example.com (Pointer 0xC017)
	TYPE	NS (0x0002)
	CLASS	IN (0x0001)
	TTL	1 day (86400)
	RDLENGTH	6
	NSDNAME	NS1.example.com (NS1 + Pointer 0xC017)
DNS Additional section	NAME	NS1.example.com (Pointer 0xC057)
	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.
        4. Received standard query response including NAPTR resource record.
        6. Received standard query response including SRV resource record.

TERMINATION

        None

REFERENCE

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

        RFC3403 Dynamic Delegation Discovery System (DDDS)
                Part Four: The Uniform Resource Identifiers (URI)
                Resolution Application
        4.3 Flags