WNM: Make ESS Disassoc Imminent event more convenient to use

Define a proper event prefix and include additional information to allow
ESS Dissassociation Imminent event to be used in a wpa_cli action
script.

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>

src/common/wpa_ctrl.h

@@ -132,6 +132,9 @@ extern "C" {
 #define P2P_EVENT_INVITATION_RESULT "P2P-INVITATION-RESULT "
 #define P2P_EVENT_FIND_STOPPED "P2P-FIND-STOPPED "
 
+/* parameters: <PMF enabled> <timeout in ms> <Session Information URL> */
+#define ESS_DISASSOC_IMMINENT "ESS-DISASSOC-IMMINENT "
+
 #define INTERWORKING_AP "INTERWORKING-AP "
 #define INTERWORKING_NO_MATCH "INTERWORKING-NO-MATCH "
 

src/rsn_supp/wpa.c

@@ -2412,6 +2412,21 @@ int wpa_sm_get_status(struct wpa_sm *sm, char *buf, size_t buflen,
 }
 
 
+int wpa_sm_pmf_enabled(struct wpa_sm *sm)
+{
+	struct wpa_ie_data rsn;
+
+	if (sm->mfp == NO_MGMT_FRAME_PROTECTION || !sm->ap_rsn_ie)
+		return 0;
+
+	if (wpa_parse_wpa_ie_rsn(sm->ap_rsn_ie, sm->ap_rsn_ie_len, &rsn) >= 0 &&
+	    rsn.capabilities & (WPA_CAPABILITY_MFPR | WPA_CAPABILITY_MFPC))
+		return 1;
+
+	return 0;
+}
+
+
 /**
  * wpa_sm_set_assoc_wpa_ie_default - Generate own WPA/RSN IE from configuration
  * @sm: Pointer to WPA state machine data from wpa_sm_init()

src/rsn_supp/wpa.h

@@ -123,6 +123,7 @@ unsigned int wpa_sm_get_param(struct wpa_sm *sm,
 
 int wpa_sm_get_status(struct wpa_sm *sm, char *buf, size_t buflen,
 		      int verbose);
+int wpa_sm_pmf_enabled(struct wpa_sm *sm);
 
 void wpa_sm_key_request(struct wpa_sm *sm, int error, int pairwise);
 

wpa_supplicant/wnm_sta.c

@@ -1,6 +1,6 @@
 /*
  * wpa_supplicant - WNM
- * Copyright (c) 2011-2012, Qualcomm Atheros, Inc.
+ * Copyright (c) 2011-2013, Qualcomm Atheros, Inc.
  *
  * This software may be distributed under the terms of the BSD license.
  * See README for more details.
@@ -10,6 +10,7 @@
 
 #include "utils/common.h"
 #include "common/ieee802_11_defs.h"
+#include "common/wpa_ctrl.h"
 #include "rsn_supp/wpa.h"
 #include "wpa_supplicant_i.h"
 #include "driver_i.h"
@@ -615,6 +616,8 @@ static void ieee802_11_rx_bss_trans_mgmt_req(struct wpa_supplicant *wpa_s,
 
 	if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_ESS_DISASSOC_IMMINENT) {
 		char url[256];
+		unsigned int beacon_int;
+
 		if (pos + 1 > end || pos + 1 + pos[0] > end) {
 			wpa_printf(MSG_DEBUG, "WNM: Invalid BSS Transition "
 				   "Management Request (URL)");
@@ -623,8 +626,15 @@ static void ieee802_11_rx_bss_trans_mgmt_req(struct wpa_supplicant *wpa_s,
 		os_memcpy(url, pos + 1, pos[0]);
 		url[pos[0]] = '\0';
 		pos += 1 + pos[0];
-		wpa_msg(wpa_s, MSG_INFO, "WNM: ESS Disassociation Imminent - "
+
-			"session_info_url=%s", url);
+		if (wpa_s->current_bss)
+			beacon_int = wpa_s->current_bss->beacon_int;
+		else
+			beacon_int = 100; /* best guess */
+
+		wpa_msg(wpa_s, MSG_INFO, ESS_DISASSOC_IMMINENT "%d %u %s",
+			wpa_sm_pmf_enabled(wpa_s->wpa),
+			wpa_s->wnm_dissoc_timer * beacon_int * 128 / 125, url);
 	}
 
 	if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_DISASSOC_IMMINENT) {

wpa_supplicant/wpa_cli.c

@@ -3036,6 +3036,8 @@ static void wpa_cli_action_process(const char *msg)
 		wpa_cli_exec(action_file, ctrl_ifname, pos);
 	} else if (str_match(pos, AP_STA_DISCONNECTED)) {
 		wpa_cli_exec(action_file, ctrl_ifname, pos);
+	} else if (str_match(pos, ESS_DISASSOC_IMMINENT)) {
+		wpa_cli_exec(action_file, ctrl_ifname, pos);
 	} else if (str_match(pos, WPA_EVENT_TERMINATING)) {
 		printf("wpa_supplicant is terminating - stop monitoring\n");
 		wpa_cli_quit = 1;