Endpoint mismatch in FreeRTOS_MatchingEndpoint

[ravitd]

Endpoint mismatch in FreeRTOS_MatchingEndpoint

Description

From question on forum https://forums.freertos.org/t/endpoint-mismatch-in-freertos-matchingendpoint/22817/6, following changes have been made.

1. Match endpoint based on source IP in the same netmask.
2. Copy Sender IP address to xAddressFrom and Target IP address to xAddressTo for both ARP Request and Reply.

Test Steps

Add unit test to test netmask match

Checklist:

• I have tested my changes. No regression in existing tests.
• I have modified and/or added unit-tests to cover the code changes in this Pull Request.

Related Issue

https://forums.freertos.org/t/endpoint-mismatch-in-freertos-matchingendpoint/22817/6

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[tony-josi-aws]

@ravitd

Thanks for creating this PR, and sorry for the delay. We are in the process of reviewing and testing the changes.
Will get this merged soon.