[PATCH v9 0/7] Introduce Automated Frequency Coordination (AFC) support

[Allen Ye]

This patch series introduces Automated Frequency Coordination (AFC) support
for Standard Power Devices (SPDs) operating in the 6GHz UNII-5 and UNII-7
bands. AFC is a regulatory requirement for SPDs to determine a list of
available channels and their permissible power levels.

The implementation introduces a new standalone daemon, afcd, to manage
communication with the AFC server. A client within hostapd then interacts
with afcd via a Unix socket to fetch spectrum availability and update AP
parameters accordingly. The series also includes hwsim tests for validation.

The implementation has been tested against the Wi-Fi Alliance's AFC DUT
Test Harness [0].

[0] https://github.com/Wi-FiTestSuite/AFC-DUT/tree/main

Changes since v8:
- rework afc request with internal JSON implementation
- add hwsim test case to mock afcd and AFC server
- add ctrl interface commands to dump AFC information and resend requests
- rebase on top of hostapd main branch
Changes since v7:
- fix 320MHz channel width support
- rebase on top of hostapd main branch
Changes since v6:
- do not run acs in hostapd_afc_handle_request() if the configured channel is
  available in the AFC list from the coordinator
- fix possible crash in hostap_afc_disable_channels()
- add more debug log in hostapd_afc_parse_reply()
Changes since v5:
- rebased on top of hostapd main branch
Changes since v4:
- fix curl header parsing
- increase afc buffer size
- fix afc-reply.txt
- add some more error logging
- add sanity check for some afc config file data
Changes since v3:
- fix compilation errors when IEEE80211_AX is not enabled
- fix a leftover crash stopping the interface
- make sure rx buffer is null-terminated
Changes since v2:
- multiple fixes testing with AFC DUT Test Harness
Changes since v1:
- use unix socket instead of a tcp one
Changes since rfc:
- move curl connection to a dedicated afc daemon

Allen Ye (4):
  JSON: Add double type support
  hostapd: Expand hostapd_cli can ctrl_iface buffer size
  hostapd: Support 80/160/320 MHz widths in hostapd_is_usable_chans
  tests: Add AFC hwsim tests

Lorenzo Bianconi (3):
  hostapd: afcd: Add AFC daemon support
  hostapd: ap: Add AFC client support
  hostapd: Update TPE IE according to AFC

 afc/.gitignore          |    1 +
 afc/Makefile            |   31 ++
 afc/afc-reply.txt       |  219 ++++++++
 afc/afcd.c              |  402 ++++++++++++++
 hostapd/Makefile        |    8 +
 hostapd/config_file.c   |  250 +++++++++
 hostapd/ctrl_iface.c    |   53 +-
 hostapd/defconfig       |    3 +
 hostapd/hostapd.conf    |   41 ++
 hostapd/hostapd_cli.c   |   31 +-
 src/ap/afc.c            | 1114 +++++++++++++++++++++++++++++++++++++++
 src/ap/ap_config.c      |   15 +
 src/ap/ap_config.h      |   46 ++
 src/ap/hostapd.c        |   19 +
 src/ap/hostapd.h        |   62 +++
 src/ap/hw_features.c    |  129 ++++-
 src/ap/hw_features.h    |    7 +
 src/ap/ieee802_11.c     |   53 +-
 src/utils/json.c        |  137 ++++-
 src/utils/json.h        |    3 +
 tests/hwsim/test_afc.py |  253 +++++++++
 21 files changed, 2805 insertions(+), 72 deletions(-)
 create mode 100644 afc/.gitignore
 create mode 100644 afc/Makefile
 create mode 100644 afc/afc-reply.txt
 create mode 100644 afc/afcd.c
 create mode 100644 src/ap/afc.c
 create mode 100644 tests/hwsim/test_afc.py

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2.45.2