netinet: add ipv6 address ioctl macros

[rmikielis]

JIRA RTOS-1160

add psh/ifconfig feature to show ipv6 address assigned

Description

Dependency tree:
phoenix-rtos/phoenix-rtos-utils#246

Motivation and Context

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Chore (refactoring, style fixes, git/CI config, submodule management, no code logic changes)

How Has This Been Tested?

• Already covered by automatic testing.
• New test added: (add PR link here).
• Tested by hand on: (ia32-QEMU / imxrt-1064evk).

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing linter checks and tests passed.
• My changes generate no new compilation warnings for any of the targets.

Special treatment

• This PR needs additional PRs to work (list the PRs, preferably in merge-order).
• I will merge this PR by myself when appropriate.

[gemini-code-assist]

Summary of Changes

Hello @rmikielis, 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 introduces essential updates to the networking stack to enhance IPv6 support. The primary goal is to enable the display of assigned IPv6 addresses through tools like ifconfig by providing the necessary IOCTL macros and address structure definitions. These changes lay the groundwork for more robust IPv6 address management and visibility within the system.

Highlights

• IPv6 IOCTL Macros: New macros like SIOCGIFADDR_IN6 have been added to include/net/if6.h to facilitate retrieving IPv6 addresses and other interface information.
• in6_ifreq Structure Enhancements: The struct in6_ifreq in include/net/if6.h has been updated with convenience macros (e.g., ifr_addr6, ifr_flags6) for easier access to its union members, and ifru_flags was removed.
• Global IPv6 Address Detection: A new macro, IN6_IS_ADDR_GLOBAL, has been introduced in include/netinet/in.h to identify unicast global IPv6 addresses.
• LWIP IPv6 Configuration: The LWIP_IPV6_NUM_ADDRESSES macro has been defined in include/net/if6.h to configure the number of IPv6 addresses for LWIP.

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[gemini-code-assist]

Code Review

This pull request introduces new ioctl macros to support IPv6 address handling, which is a dependency for an ifconfig feature. The changes are mostly in header files, defining new structures, macros, and ioctl commands. While the additions are functionally relevant, I've identified a critical issue with conflicting ioctl command numbers that must be addressed. There is also a suggestion to improve code maintainability.

[github-actions]

Unit Test Results

9 442 tests   8 853 ✅  48m 41s ⏱️
  544 suites    589 💤
    1 files        0 ❌

Results for commit a4d2724.

♻️ This comment has been updated with latest results.