Dear project owners and developers,

I would like to follow up on your recent great work regarding the support of the Berkeley Socket API support in Wasm (POSIX and Windows) by providing an implementation for Intel SGX enclaves.

In my view, the proposed changes extend naturally the work you have done. To be comprehensive, here is a complete list of the enhancement of this pull request:

• bring Berkeley socket API in Intel SGX enclaves,
• adapt the documentation of the socket API to mention Intel SGX enclaves,
• adapt iwasm in the mini-product linux-sgx to support the same option as the one for linux,
• tested on the socket sample as provided by WAMR (the TCP client/server).

I always strive to follow the coding guidelines, advice/feedback and perform any required code changes that would better suit your conventions. Don't hesitate to code review and ask for changes.

Cheers, Jämes

@JamesMenetrey, thanks for submitting the PR, it is really cool!

For the coding guidelines, please refer to https://github.com/bytecodealliance/wasm-micro-runtime/blob/main/ci/coding_guidelines_check.py#L103-L113

Normally after coding and before submitting the PR, we can use clang-format-12 to format all the source files:

clang-format-12 -i --style=file `find core/iwasm -name "*.h"`
clang-format-12 -i --style=file `find core/iwasm -name "*.c"`

Hey @wenyongh, thanks for your feedback! I could successfully run clang-format on the source and header files.

I also provided a change based on your review, where I have removed the annotation out in the EDL for the socket structure in the POSIX functions accept and connect since they do not alter it.