rfc2765_3.1_nextheaderfrag.seq - Verify IPv6 <-> IPv4 header
translation in accordance with RFC2765 [SIIT]
Router
rfc2765_3.1_nextheaderfrag.seq [-tooloption ...]
-p rfc2765_3.1_nextheaderfrag.def
Before this test starts, run initialize.seq.
This test verifies that NUT can translates IPv4 Protocol field
to IPv6 Next Header field.
Network Topology
Link0
--------------------------
| |
TN NUT
| |
--------------------------
Link1
TN -- (Link0) -- NUT NUT -- (Link1) -- TN
--------------------- ------------------------
1.1.
<===================
ICMPv4 Echo request
IPv4 Header
src address : TN LINK1 IPv4 address
dst address : TN LINK0 IPv4 address
Don't Fragment = 0
Protocol = 1
Identifier = 10000
ICMPv4 echo request
1.2.
<<JUDGMENT>>
<===================
ICMPv6 Echo Request
IPv6 Header
src address : TN LINK1 IPv4 embedded IPv6 address
dst address : TN LINK0 IPv4 embedded IPv6 address
Fragment Header
Next Header = 58
Identification = 10000
ICMPv6 echo request
2.1.
<===================
IPv4 UDP packet
IPv4 Header
src address : TN LINK1 IPv4 address
dst address : TN LINK0 IPv4 address
Don't Fragment = 1
Protocol = 17
Identifier = 20000
UDP packet
Checksum including IPv4 pseudo header
data = repeat(0xff,64)
2.2.
<<JUDGMENT>>
<===================
IPv6 UDP packet
IPv6 Header
src address : TN LINK1 IPv4 embedded IPv6 address
dst address : TN LINK0 IPv4 embedded IPv6 address
Fragment Header
Next Header = 17
Identification = 20000
UDP packet
Checksum including IPv6 pseudo header
data = repeat(0xff,64)
3.1.
<===================
IPv4 TCP packet
IPv4 Header
src address : TN LINK1 IPv4 address
dst address : TN LINK0 IPv4 address
Don't Fragment = 0
Protocol = 6
Identifier = 30000
TCP packet
Checksum including IPv4 pseudo header
data = repeat(0xff,64)
3.2.
<<JUDGMENT>>
<===================
IPv6 UDP packet
IPv6 Header
src address : TN LINK1 IPv4 embedded IPv6 address
dst address : TN LINK0 IPv4 embedded IPv6 address
Fragment Header
Next Header = 6
Identification = 30000
TCP packet
Checksum including IPv6 pseudo header
data = repeat(0xff,64)
4.1.
<===================
IPv4 unknown protocol(255) packet
IPv4 Header
src address : TN LINK1 IPv4 address
dst address : TN LINK0 IPv4 address
Don't Fragment = 1
Protocol = 255
Identifier = 40000
data = repeat(0xff,64)
4.2.
<<JUDGMENT>>
<===================
IPv6 unknown protocol(255) packet
IPv6 Header
src address : TN LINK1 IPv4 embedded IPv6 address
dst address : TN LINK0 IPv4 embedded IPv6 address
Fragment Header
Next Header = 255
Identification = 40000
data = repeat(0xff,64)
<< PASS >>
NUT translates ICMPv4 to ICMPv6, recalculates header
checksum for UDP and TCP, and let other protocols
pass through unchanged.
<< FAIL >>
TN (Link0) does not receive an ICMPv6, an UDP, a TCP
and an IPv6 packet with Next Header = 255.
RFC2765
3.1. Translating IPv4 Headers into IPv6 Headers
If there is need to add a fragment header (the DF bit is not set or the packet is a fragment) the header fields are set as above with the following exceptions:
Fragment header fields:
Next Header:
Protocol field copied from IPv4 header.
Identification:
The low-order 16 bits copied from the Identification
field in the IPv4 header. The high-order 16 bits set
to zero.
perldoc V6evalTool