Add LayerTypeRaw for LinkTypeRaw link layers

[zecke]

[zecke]

It is based on the PR for DLT_RAW. I don't comprehend the relationship between LayerType and EnumMetadata yet. In the EnumMetadata instance one can refer a LayerType (and that is done for higher level IP protocols but not for the link layer). At the same time a generic LayerType could probably use EnumMetadata.

The above seems to lead to some code duplication and difficulty to test things (E.g. DecodeFromBytes not called)

[tsg]

@zecke Would it be possible to (also) open this upstream at https://github.com/google/gopacket ? I do hope to resync gopacket with the upstream code at some point, and the more custom code we have, the harder will be. This might also give you better reviews.

[zecke]

I have done so and had to fix some testcases. Do you want to enable travis-ci support for your clone to see if I should fix things here as well?

[tsg]

@zecke Thanks, I enabled travis checks in #10. Can you rebase this one to have the tests run?

Thanks for submitting the patch upstream, I'll follow the discussion on https://github.com/google/gopacket/pull/324.

[zecke]

Done that but looking at the build log I wonder..

The command "go test github.com/google/gopacket/layers" exited with 0.
0.68s$ go test github.com/google/gopacket/tcpassembly
ok  	github.com/google/gopacket/tcpassembly	0.147s

shouldn't this be "tsg/gopacket"? .travis.yml change s/google/tsg/?

[tsg]

@zecke ah, missed that :). Fixing it in #11.