NAME

  HTR_A_In_DM_DSTH_optlen - Host Transport Mode AH Inbound, Detect modification of DstOpt header option len before AH

TARGET

  Host

SYNOPSIS

  HTR_A_In_DM_DSTH_optlen.seq [-tooloption ...] -pkt HTR_A_DM_DSTH_optlen.def
    -tooloption : v6eval tool option
  See also HTR_A_common.def and HTR_common.def

INITIALIZATION

For details of Network Topology, see 00README

Set NUT's SAD and SPD as following:

              NET5      NET3
    HOST1_NET5 -- Router -- NUT
         -----transport----->

Security Association Database (SAD)

source address	HOST1_NET5
destination address	NUT_NET3
SPI	0x1000
mode	transport
protocol	AH
AH algorithm	HMAC-MD5
AH algorithm key	0123456789ABCDEF

Security Policy Database (SPD)

source address	HOST1_NET5
destination address	NUT_NET3
upper spec	any
direction	in
protocol	AH
mode	transport

TEST PROCEDURE

 Tester                      Target
   |                           |
 Subtest No.1 "option bit 000: option len is immutable"
   |                           |
   |-------------------------->|
   |      ICMP Echo Request    |
   |      with [DSTH][AH]      |
   |                           |
   |<--------------------------|
   |      ICMP Echo Reply      |
   |        Judgement #1       |
   |                           |
   |-------------------------->|
   |      ICMP Echo Request    |
   |      with [DSTH][AH]      |
   |  (option len of DSTH is modified 0x04->0x02)
   |                           |
   | (<----------------------) |
   |     No ICMP Echo Reply    |
   |        Judgement #2       |
   v                           v
 Subtest No.2 "option bit 001: option len is immutable"
   |                           |
   |-------------------------->|
   |      ICMP Echo Request    |
   |      with [DSTH][AH]      |
   |  (option len of DSTH is modified 0x04->0x02)
   |                           |
   | (<----------------------) |
   |     No ICMP Echo Reply    |
   |        Judgement #3       |
   |                           |
   v                           v

ICMP Echo Request with [DSTH][AH]

IP Header	Source Address	HOST1_NET5
	Destination Address	NUT_NET3
Destination Options Header	Type	0x02
	Data Length	4
	Data	0x0f0f0000
AH	SPI	0x1000
	Sequence Number	1
	Algorithm	HMAC-MD5
	Key	0123456789ABCDEF
ICMP	Type	128 (Echo Request)

ICMP Echo Reply

IP Header	Source Address	NUT_NET3
	Destination Address	HOST1_NET5
ICMP	Type	129 (Echo Reply)

ICMP Echo Request with [DSTH][AH] (option len of DSTH is modified 0x04->0x02)

IP Header	Source Address	HOST1_NET5
	Destination Address	NUT_NET3
Destination Options Header	Type	0x02
	Data Length	2 (4 is original)
	Data	0x0f0f
	Type	Pad1
	Type	Pad1
AH	SPI	0x1000
	Sequence Number	1
	Algorithm	HMAC-MD5
	Key	0123456789ABCDEF
ICMP	Type	128 (Echo Request)

ICMP Echo Request with [DSTH][AH] (option type of DSTH is modified 0x04->0x02)

IP Header	Source Address	HOST1_NET5
	Destination Address	NUT_NET3
Destination Options Header	Type	0x22
	Data Length	2 (4 is original)
	Data	0x0f0f
	Type	Pad1
	Type	Pad1
AH	SPI	0x1000
	Sequence Number	1
	Algorithm	HMAC-MD5
	Key	0123456789ABCDEF
ICMP	Type	128 (Echo Request)

JUDGEMENT