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Nico Schottelius 2019-08-22 15:01:14 +02:00
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@ -28,7 +28,7 @@ is more feature rich.
For this thesis the parsing capabilities of P4 were adequate. For this thesis the parsing capabilities of P4 were adequate.
However P4, at the time of writing, cannot parse ICMP6 options in However P4, at the time of writing, cannot parse ICMP6 options in
general, as the upper level protocol does not specify the number general, as the upper level protocol does not specify the number
of options that follow and parsing of an undefined number of option blocks that follow. Parsing of an unspecified number
of 64 bit blocks is required, which P4 does not support. of 64 bit blocks is required, which P4 does not support.
The language has some limitations on the placement of The language has some limitations on the placement of
@ -235,7 +235,7 @@ the controller and vice versa. As we consider both features to be
portable, we also consider the NAT64 session feature to be portable. portable, we also consider the NAT64 session feature to be portable.
P4/NetFPGA does not offer calculating the checksum over the payload P4/NetFPGA does not offer calculating the checksum over the payload
and thus calculating the checksum over the payload to create and thus calculating the checksum over the payload creating
a reply for an neighbor solicitation packet is not possible. However, a reply for an neighbor solicitation packet is not possible. However,
as the payload stays the same as in the request, our delta based as the payload stays the same as in the request, our delta based
checksum approach can be reused in this situation. With the same checksum approach can be reused in this situation. With the same
@ -249,7 +249,7 @@ any changes.
While the P4/NetFPGA target currently does not support accessing the While the P4/NetFPGA target currently does not support accessing the
payload or creating checksums over it, there are two possibilities to payload or creating checksums over it, there are two possibilities to
extend the platform: either by creating an HDL module or by extend the platform: either by creating an HDL module or by
modify the generated the PX modifying the generated PX
program.~\cite{schottelius:_exter_p4_netpf} program.~\cite{schottelius:_exter_p4_netpf}
Due to the existing code complexity of the P4/NetFPGA platform, using Due to the existing code complexity of the P4/NetFPGA platform, using
the HDL module based approach is likely to be more sustainable. the HDL module based approach is likely to be more sustainable.