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RRM: Add support for beacon report fragmentation

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When the frame body subelement would cause the measurement report
element to exceed the maximum element size, the frame body subelement
used to be truncated. In addition, some elements were always truncated
in order to keep the reported frame body short (e.g. RSN IE).

Alternatively, IEEE P802.11-REVmd/D2.0, 9.4.2.21.7 extension to Beacon
reporting can be used: The frame body subelement is fragmented across
multiple beacon report elements, and the reported frame body fragment ID
subelement is added.

Use beacon report fragmentation instead of truncating the frame body
as this method gives the AP a more complete information about the
reported APs.

Signed-off-by: Avraham Stern <avraham.stern@intel.com>
This commit is contained in:
Avraham Stern 2018-08-22 16:46:17 +03:00 • committed by Jouni Malinen
parent 6a94fdf21a
commit 3ec118780a
2 changed files with 108 additions and 55 deletions
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8
src/common/ieee802_11_defs.h
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@ -1905,9 +1905,17 @@ struct rrm_measurement_beacon_report {
} STRUCT_PACKED;
/* IEEE Std 802.11-2016, Table 9-112 - Beacon report Subelement IDs */
/* IEEE P802.11-REVmd/D2.0, Table 9-130 - Optional subelement IDs for
* Beacon report */
#define WLAN_BEACON_REPORT_SUBELEM_FRAME_BODY 1
#define WLAN_BEACON_REPORT_SUBELEM_FRAME_BODY_FRAGMENT_ID 2
#define WLAN_BEACON_REPORT_SUBELEM_VENDOR 221
/* IEEE P802.11-REVmd/D2.0, Table 9-232 - Data field format of the
* Reported Frame Body Fragment ID subelement */
#define REPORTED_FRAME_BODY_SUBELEM_LEN 4
#define REPORTED_FRAME_BODY_MORE_FRAGMENTS BIT(7)
/* IEEE Std 802.11ad-2012 - Multi-band element */
struct multi_band_ie {
u8 eid; /* WLAN_EID_MULTI_BAND */