NAME

routerRecvRsInvalid - Verifying invalid RS does not influence NCE.

TARGET

Router Only

INITIALIZATION

  Clear a neighbor cache entry for TN.

TEST PROCEDURE

routerRecvRsInvalid verifies that NUT does not create NCE even if receive an invalid RS.

  TN                 NUT
  ----------------------


  State: No neighbor cache entry (for TN)


  ==== invalid RS ===>


  Judgment: Examining NUT's neighbor state

JUDGMENT

  ==================+=====================================
  RS                | NCE state
                    +------------------+------------------
                    | Before           | After
                    | receiving the RS | receiving the RS
  ==================+==================+==================
  RS w/ SLL         | none             | none 
  hop *limit!=255   |
  ------------------+------------------+------------------
  RS w/ SLL         | none             | none 
  *invalid checksum |
  ------------------+------------------+------------------
  RS w/ SLL         | none             | none 
  *icmp code!=0     |
  ------------------+------------------+------------------
  RS w/ SLL         | none             | none 
  *src=unspecified  |
  ==================+==================+==================

TERMINATION

  N/A

NOTE

  N/A

REFERENCE

RFC2461

6.1.1.  Validation of Router Solicitation Messages

   A router MUST silently discard any received Router Solicitation
   messages that do not satisfy all of the following validity checks:

      - The IP Hop Limit field has a value of 255, i.e., the packet
        could not possibly have been forwarded by a router.

      - If the message includes an IP Authentication Header, the message
        authenticates correctly.

      - ICMP Checksum is valid.

      - ICMP Code is 0.

      - ICMP length (derived from the IP length) is 8 or more octets.

      - All included options have a length that is greater than zero.

      - If the IP source address is the unspecified address, there is no
        source link-layer address option in the message.

  perldoc V6evalTool
  perldoc V6evalRemote