[TransferEngine] initiator_test script: make it works with P2PHANDSHAKE.

[doujiang24]

WIth this PR, we could do test with P2PHANDSHAKE, i.e.

MC_METADATA_SERVER=P2PHANDSHAKE TARGET_SERVER_NAME=$LOCALIP:12345 PROTOCOL=rdma python3 target.py

TARGET_SERVER_NAME=$TARGETIPPORT INITIATOR_SERVER_NAME=$LOCALIP:12347 MC_METADATA_SERVER=P2PHANDSHAKE PROTOCOL=rdma python3 initiator_test.py

[gemini-code-assist]

Summary of Changes

Hello @doujiang24, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request enhances the TransferEngine's initiator test script to support the P2PHANDSHAKE metadata server. The primary purpose is to ensure that the test environment correctly configures the initiator's communication endpoint, specifically its RPC port, when operating in a peer-to-peer handshaking scenario. This change allows for more robust testing of the TransferEngine's capabilities under different metadata server configurations.

Highlights

• P2PHANDSHAKE Compatibility: The initiator test script has been updated to correctly function when the P2PHANDSHAKE metadata server is utilized, enabling comprehensive testing for this configuration.
• Dynamic Port Configuration: The initiator's server name is now dynamically configured to use the correct RPC port obtained from the adaptor when P2PHANDSHAKE is active, ensuring proper communication setup.

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[gemini-code-assist]

Code Review

This pull request updates the initiator_test script to support P2PHANDSHAKE mode by dynamically updating the initiator server name with the port assigned by the transfer engine. The change is correct in its intent. However, the implementation for parsing the hostname is not robust and will fail for IPv6 addresses. I've suggested a fix to handle both IPv4 and IPv6 addresses correctly.

[alogfans]

LGTM. You can consider the advise from AI assistant. Just for suggestion

[ShangmingCai]

LGTM. But the CI fails when preparing the dependency, maybe push an empty commit to retrigger the CI.

[doujiang24]

Thanks @alogfans and @ShangmingCai , suggestion from from AI assistant accepted and CI is happy now, merging.