Initial Changes for RDMA as a platform for MsQuic

[srsubra]

this PR is mainly for help with debugging issues with datapath tests. A New PR will be raised only the code has completed testing

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[guhetier]

Review in progress, making my way through the RDMA code.
Added a few generic comments.

[guhetier]

We need to clarify which design we follow for RDMA, between the "TCP / UDP" one and the "normal/xdp" one.
Which is tricky, because RDMA is a protocol (like udp/tcp) but it also largely align with what we do for xdp (co-exists as an alternative pipe to the network).

Maybe it will have to be part of a bigger refactoring of the datapath, later.

[guhetier]

nit: Random witespaces

[guhetier]

Please use an enum for flags.

[guhetier]

nit: We try to keep a consistent style. Before we conclude the PR, we will need to fix it ({ are opened on the line of the if, a few spaces issues, etc... through the PR).

I won't comment on it for now, just a todo for later.

[guhetier]

File checked in by mistake?

[guhetier]

By curiosity, what is your logic for function that your wrapped vs these direct calls?

[guhetier]

Here (and in other occurences with wrappers), we end up logging the same error multiple time. It might be worth chosing between loging in the wrapper or out of it and systematically apply it.

[guhetier]

Suggested change

	memset(RdmaConnection, 0, sizeof(RDMA_CONNECTION));
	CxPlatZeroMemory(RdmaConnection, sizeof(RDMA_CONNECTION));

[guhetier]

This should probably be updated for RDMA. I don't think receive coalescing can apply

[guhetier]

What does it mean for a client socket to not have a remote address? Is it possible / valid?