Ensure 6GHz bands can be configured

[abeltrano]

Type

• Bug fix
• Feature addition
• Feature update
• Documentation
• Build Infrastructure

Side Effects

• Breaking change
• Non-functional change

Goals

• Ensure 6GHz bands are enabled when requested. This band requires protected management frames (PMF) and this was not being set in the lower hostapd layer.

Technical Details

• Add ManagementFrameProtection enumeration for hostapd.
• Extend AccessPointControllerLinux::SetFrequencyBands to set the ieee80211w management frames property to ManagementFrameProtection::Required.
• Move hw_mode property value helper to ProtocolHostapd with other related ones.

Test Results

• All unit tests pass.
• Verified out-of-band with hostapd_cli that 6GHz band is enabled following enabling it using the cli.

Reviewer Focus

• None

Future Work

• Additional 6GHz related features may need additional changes. These will be determined as needed.

Checklist

• Build target all compiles cleanly.
• clang-format and clang-tidy deltas produced no new output.
• Newly added functions include doxygen-style comment block.