NAME

        rfc2765_3.1_options.seq - Verify IPv6 <-> IPv4 header 
        translation in accordance with RFC2765 [SIIT]


TARGET

        Router


SYNOPSIS

        rfc2765_3.1_options.seq [-tooloption ...] 
        -p rfc2765_3.1_options.def


INITIALIZATION

	Before this test starts, run initialize.seq.


TEST PROCEDURE

        This test verifies that NUT drops IPv4 packets with unexpired 
        Source Route options, and reply with ICMPv4 Destination Unreachable.
        
        Network Topology
        Link0
        --------------------------
            |               |
           TN              NUT
            |               |
        --------------------------
        Link1
        TN -- (Link0) -- NUT        NUT -- (Link1) -- TN
        
        ---------------------      ------------------------

3.1.[1-2] <=================== ICMPv4 Echo request IPv4 Header src address : TN LINK1 IPv4 address dst address : TN LINK0 IPv4 address Don't Fragment = 1 More fragments = 0 Offset = 0 Option = Loose Source Route (Route unexpired) or Strict Source Route (Route unexpired) ICMPv4 echo request 3.2.[1-2] <> ===================> ICMPv4 Destination Unreachable IPv4 Header src address : NUT LINK1 IPv4 address dst address : TN LINK1 IPv4 address ICMPv6 Destination Unreachable data = IPv4 Loose Source Route (Route unexpired) or IPv4 Strict Source Route (Route unexpired) <> No packets received on either link <> <=================== ICMPv6 Echo Request IPv6 Header src address : TN LINK0 IPv4 embedded IPv6 address dst address : TN LINK1 IPv4 embedded IPv6 address Hop Limit = 63 ICMPv6 echo request
4.1.1 <=================== ICMPv4 Echo request IPv4 Header src address : TN LINK1 IPv4 address dst address : TN LINK0 IPv4 address Don't Fragment = 1 More fragments = 0 Offset = 0 option = NOP option = Loose Source Route (Route expired) option = NOP option = Strict Source Route (Route unexpired) option = NOP option = Record Route option = End of OptionList Padding = 0; Padding = 0; Padding = 0; ICMPv4 echo request 4.2.1 <> ===================> ICMPv4 Destination Unreachable IPv4 Header src address : NUT LINK1 IPv4 address dst address : TN LINK1 IPv4 address ICMPv6 Destination Unreachable data = IPv4 packet sent <> No packets received on either link <> <=================== ICMPv6 Echo Request IPv6 Header src address : TN LINK0 IPv4 embedded IPv6 address dst address : TN LINK1 IPv4 embedded IPv6 address Hop Limit = 63 ICMPv6 echo request


JUDGMENT

<< PASS >> NUT ignores all options except unexpired Source Route. NUT sends ICMPv4 Destination Unreachable (Type 3/Code 5) upon receiving an unexpired Source Route option. << FAIL >> NUT translates IPv4 packets with unexpired Source Route option, and forwards the packet. << WARN >> NUT ignores all options except unexpired Source Route. NUT neither forwards unexpired Source Route packets, nor sends an ICMPv4 Destination Unreachable back.


NOTE


REFERENCE

B3.1. Translating IPv4 Headers into IPv6 Headers If IPv4 options are present in the IPv4 packet, they are ignored i.e., there is no attempt to translate them. However, if an unexpired source route option is present then the packet MUST instead be discarded, and an ICMPv4 "destination unreachable/source route failed" (Type 3/Code 5) error message SHOULD be returned to the sender.


SEE ALSO

perldoc V6evalTool