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-rw-r--r--include/net/cfg80211.h26
-rw-r--r--include/uapi/linux/nl80211.h16
2 files changed, 36 insertions, 6 deletions
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index b39277eb251f..5ec20369ceb8 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -1750,7 +1750,12 @@ enum cfg80211_assoc_req_flags {
* @ie_len: Length of ie buffer in octets
* @use_mfp: Use management frame protection (IEEE 802.11w) in this association
* @crypto: crypto settings
- * @prev_bssid: previous BSSID, if not %NULL use reassociate frame
+ * @prev_bssid: previous BSSID, if not %NULL use reassociate frame. This is used
+ * to indicate a request to reassociate within the ESS instead of a request
+ * do the initial association with the ESS. When included, this is set to
+ * the BSSID of the current association, i.e., to the value that is
+ * included in the Current AP address field of the Reassociation Request
+ * frame.
* @flags: See &enum cfg80211_assoc_req_flags
* @ht_capa: HT Capabilities over-rides. Values set in ht_capa_mask
* will be used in ht_capa. Un-supported values will be ignored.
@@ -1925,7 +1930,12 @@ struct cfg80211_bss_selection {
* @pbss: if set, connect to a PCP instead of AP. Valid for DMG
* networks.
* @bss_select: criteria to be used for BSS selection.
- * @prev_bssid: previous BSSID, if not %NULL use reassociate frame
+ * @prev_bssid: previous BSSID, if not %NULL use reassociate frame. This is used
+ * to indicate a request to reassociate within the ESS instead of a request
+ * do the initial association with the ESS. When included, this is set to
+ * the BSSID of the current association, i.e., to the value that is
+ * included in the Current AP address field of the Reassociation Request
+ * frame.
*/
struct cfg80211_connect_params {
struct ieee80211_channel *channel;
@@ -2377,7 +2387,17 @@ struct cfg80211_qos_map {
* @connect: Connect to the ESS with the specified parameters. When connected,
* call cfg80211_connect_result() with status code %WLAN_STATUS_SUCCESS.
* If the connection fails for some reason, call cfg80211_connect_result()
- * with the status from the AP.
+ * with the status from the AP. The driver is allowed to roam to other
+ * BSSes within the ESS when the other BSS matches the connect parameters.
+ * When such roaming is initiated by the driver, the driver is expected to
+ * verify that the target matches the configured security parameters and
+ * to use Reassociation Request frame instead of Association Request frame.
+ * The connect function can also be used to request the driver to perform
+ * a specific roam when connected to an ESS. In that case, the prev_bssid
+ * parameter is set to the BSSID of the currently associated BSS as an
+ * indication of requesting reassociation. In both the driver-initiated and
+ * new connect() call initiated roaming cases, the result of roaming is
+ * indicated with a call to cfg80211_roamed() or cfg80211_roamed_bss().
* (invoked with the wireless_dev mutex held)
* @disconnect: Disconnect from the BSS/ESS.
* (invoked with the wireless_dev mutex held)
diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h
index 6da52d7b48c4..b4606288ef7a 100644
--- a/include/uapi/linux/nl80211.h
+++ b/include/uapi/linux/nl80211.h
@@ -429,7 +429,11 @@
* @NL80211_CMD_ASSOCIATE: association request and notification; like
* NL80211_CMD_AUTHENTICATE but for Association and Reassociation
* (similar to MLME-ASSOCIATE.request, MLME-REASSOCIATE.request,
- * MLME-ASSOCIATE.confirm or MLME-REASSOCIATE.confirm primitives).
+ * MLME-ASSOCIATE.confirm or MLME-REASSOCIATE.confirm primitives). The
+ * %NL80211_ATTR_PREV_BSSID attribute is used to specify whether the
+ * request is for the initial association to an ESS (that attribute not
+ * included) or for reassociation within the ESS (that attribute is
+ * included).
* @NL80211_CMD_DEAUTHENTICATE: deauthentication request and notification; like
* NL80211_CMD_AUTHENTICATE but for Deauthentication frames (similar to
* MLME-DEAUTHENTICATION.request and MLME-DEAUTHENTICATE.indication
@@ -479,6 +483,9 @@
* set of BSSID,frequency parameters is used (i.e., either the enforcing
* %NL80211_ATTR_MAC,%NL80211_ATTR_WIPHY_FREQ or the less strict
* %NL80211_ATTR_MAC_HINT and %NL80211_ATTR_WIPHY_FREQ_HINT).
+ * %NL80211_ATTR_PREV_BSSID can be used to request a reassociation within
+ * the ESS in case the device is already associated and an association with
+ * a different BSS is desired.
* Background scan period can optionally be
* specified in %NL80211_ATTR_BG_SCAN_PERIOD,
* if not specified default background scan configuration
@@ -1287,8 +1294,11 @@ enum nl80211_commands {
* @NL80211_ATTR_RESP_IE: (Re)association response information elements as
* sent by peer, for ROAM and successful CONNECT events.
*
- * @NL80211_ATTR_PREV_BSSID: previous BSSID, to be used by in ASSOCIATE
- * commands to specify using a reassociate frame
+ * @NL80211_ATTR_PREV_BSSID: previous BSSID, to be used in ASSOCIATE and CONNECT
+ * commands to specify a request to reassociate within an ESS, i.e., to use
+ * Reassociate Request frame (with the value of this attribute in the
+ * Current AP address field) instead of Association Request frame which is
+ * used for the initial association to an ESS.
*
* @NL80211_ATTR_KEY: key information in a nested attribute with
* %NL80211_KEY_* sub-attributes