package/network/services/hostapd/patches/110-notify-mgmt-frames.patch

   1 From 53f8fdb534d5222a0e852e38afde3f49832ace06 Mon Sep 17 00:00:00 2001
   2 From: =?UTF-8?q?Rapha=C3=ABl=20M=C3=A9lotte?= <raphael.melotte@mind.be>
   3 Date: Thu, 26 Nov 2020 09:27:40 +0100
   4 Subject: [PATCH] hostapd: Add an option to notify management frames on
   5  ctrl_iface
   6 MIME-Version: 1.0
   7 Content-Type: text/plain; charset=UTF-8
   8 Content-Transfer-Encoding: 8bit
   9
  10 In some contexts (e.g. Multi-AP) it can be useful to have access to
  11 some of the management frames in upper layers (e.g. to be able to
  12 process the content of association requests externally).
  13
  14 Add 'notify_mgmt_frames'. When enabled, it will notify the ctrl_iface
  15 when a management frame arrives using 'AP_MGMT_FRAME_RECEIVED'.
  16
  17 Note that to avoid completely flooding the ctrl_iface, not all
  18 management frames are included (e.g. beacons are excluded).
  19
  20 Signed-off-by: Raphaël Mélotte <raphael.melotte@mind.be>
  21 ---
  22  hostapd/config_file.c |  2 ++
  23  hostapd/hostapd.conf  |  4 ++++
  24  src/ap/ap_config.h    |  2 ++
  25  src/ap/ieee802_11.c   | 25 +++++++++++++++++++++++++
  26  src/common/wpa_ctrl.h |  3 +++
  27  5 files changed, 36 insertions(+)
  28
  29 --- a/hostapd/config_file.c
  30 +++ b/hostapd/config_file.c
  31 @@ -4456,6 +4456,8 @@ static int hostapd_config_fill(struct ho
  32                 bss->multicast_to_unicast = atoi(pos);
  33         } else if (os_strcmp(buf, "broadcast_deauth") == 0) {
  34                 bss->broadcast_deauth = atoi(pos);
  35 +       } else if (os_strcmp(buf, "notify_mgmt_frames") == 0) {
  36 +               conf->notify_mgmt_frames = atoi(pos);
  37  #ifdef CONFIG_DPP
  38         } else if (os_strcmp(buf, "dpp_name") == 0) {
  39                 os_free(bss->dpp_name);
  40 --- a/hostapd/hostapd.conf
  41 +++ b/hostapd/hostapd.conf
  42 @@ -571,6 +571,10 @@ wmm_ac_vo_acm=0
  43  # Default: 1 (enabled)
  44  #broadcast_deauth=1
  45
  46 +# Get notifications for management frames:
  47 +# Default: 0 (disabled)
  48 +#notify_mgmt_frames=0
  49 +
  50  ##### IEEE 802.11n related configuration ######################################
  51
  52  # ieee80211n: Whether IEEE 802.11n (HT) is enabled
  53 --- a/src/ap/ap_config.h
  54 +++ b/src/ap/ap_config.h
  55 @@ -1060,6 +1060,8 @@ struct hostapd_config {
  56         unsigned int airtime_update_interval;
  57  #define AIRTIME_MODE_MAX (__AIRTIME_MODE_MAX - 1)
  58  #endif /* CONFIG_AIRTIME_POLICY */
  59 +
  60 +       u8 notify_mgmt_frames;
  61  };
  62
  63
  64 --- a/src/ap/ieee802_11.c
  65 +++ b/src/ap/ieee802_11.c
  66 @@ -4878,6 +4878,28 @@ static int handle_action(struct hostapd_
  67         return 1;
  68  }
  69
  70 +/**
  71 + * notify_mgmt_frame - notify of management frames on the control interface.
  72 + * @hapd: hostapd BSS data structure (the BSS to which the management frame was
  73 + * sent to)
  74 + * @buf: management frame data (starting from IEEE 802.11 header)
  75 + * @len: length of frame data in octets
  76 + *
  77 + * Notify the control interface of any management frame.
  78 + */
  79 +static void notify_mgmt_frame(struct hostapd_data *hapd, const u8 *buf,
  80 +                             size_t len)
  81 +{
  82 +
  83 +       int hex_len = len * 2 + 1;
  84 +       char *hex = os_malloc(hex_len);
  85 +
  86 +       if (hex) {
  87 +               wpa_snprintf_hex(hex, hex_len, buf, len);
  88 +               wpa_msg_ctrl(hapd->msg_ctx, MSG_INFO, AP_MGMT_FRAME_RECEIVED "buf=%s", hex);
  89 +               os_free(hex);
  90 +       }
  91 +}
  92
  93  /**
  94   * ieee802_11_mgmt - process incoming IEEE 802.11 management frames
  95 @@ -4969,6 +4991,9 @@ int ieee802_11_mgmt(struct hostapd_data
  96         if (hapd->iconf->track_sta_max_num)
  97                 sta_track_add(hapd->iface, mgmt->sa, ssi_signal);
  98
  99 +       if (hapd->iconf->notify_mgmt_frames)
 100 +               notify_mgmt_frame(hapd, buf, len);
 101 +
 102         switch (stype) {
 103         case WLAN_FC_STYPE_AUTH:
 104                 wpa_printf(MSG_DEBUG, "mgmt::auth");
 105 --- a/src/common/wpa_ctrl.h
 106 +++ b/src/common/wpa_ctrl.h
 107 @@ -396,6 +396,9 @@ extern "C" {
 108  #define BIT(x) (1U << (x))
 109  #endif
 110
 111 +/* Event triggered for received management frame */
 112 +#define AP_MGMT_FRAME_RECEIVED "AP-MGMT-FRAME-RECEIVED "
 113 +
 114  /* BSS command information masks */
 115
 116  #define WPA_BSS_MASK_ALL               0xFFFDFFFF