wlantest: Count number of STA ACK'ed Deauth/Disassoc frames

wlantest/process.c

@@ -100,6 +100,25 @@ static int rx_duplicate(struct wlantest *wt, const struct ieee80211_hdr *hdr,
 }
 
 
+static void rx_ack(struct wlantest *wt, const struct ieee80211_hdr *hdr)
+{
+	struct ieee80211_hdr *last = (struct ieee80211_hdr *) wt->last_hdr;
+	u16 fc;
+
+	if (wt->last_len < 24 || (last->addr1[0] & 0x01) ||
+	    os_memcmp(hdr->addr1, last->addr2, ETH_ALEN) != 0) {
+		wpa_printf(MSG_MSGDUMP, "Unknown Ack frame (previous frame "
+			   "not seen)");
+		return;
+	}
+
+	/* Ack to the previous frame */
+	fc = le_to_host16(last->frame_control);
+	if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT)
+		rx_mgmt_ack(wt, last);
+}
+
+
 static void rx_frame(struct wlantest *wt, const u8 *data, size_t len)
 {
 	const struct ieee80211_hdr *hdr;
@@ -129,6 +148,8 @@ static void rx_frame(struct wlantest *wt, const u8 *data, size_t len)
 		if (len < 10)
 			break;
 		wt->rx_ctrl++;
+		if (WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_ACK)
+			rx_ack(wt, hdr);
 		break;
 	case WLAN_FC_TYPE_DATA:
 		if (len < 24)
@@ -142,6 +163,10 @@ static void rx_frame(struct wlantest *wt, const u8 *data, size_t len)
 			   WLAN_FC_GET_TYPE(fc));
 		break;
 	}
+
+	os_memcpy(wt->last_hdr, data, len > sizeof(wt->last_hdr) ?
+		  sizeof(wt->last_hdr) : len);
+	wt->last_len = len;
 }
 
 

wlantest/rx_mgmt.c

@@ -1035,4 +1035,88 @@ void rx_mgmt(struct wlantest *wt, const u8 *data, size_t len)
 	}
 
 	os_free(decrypted);
+
+	wt->last_mgmt_valid = valid;
+}
+
+
+static void rx_mgmt_deauth_ack(struct wlantest *wt,
+			       const struct ieee80211_hdr *hdr)
+{
+	const struct ieee80211_mgmt *mgmt;
+	struct wlantest_bss *bss;
+	struct wlantest_sta *sta;
+
+	mgmt = (const struct ieee80211_mgmt *) hdr;
+	bss = bss_get(wt, mgmt->bssid);
+	if (bss == NULL)
+		return;
+	if (os_memcmp(mgmt->sa, mgmt->bssid, ETH_ALEN) == 0)
+		sta = sta_get(bss, mgmt->da);
+	else
+		sta = sta_get(bss, mgmt->sa);
+	if (sta == NULL)
+		return;
+
+	wpa_printf(MSG_DEBUG, "DEAUTH from " MACSTR " acknowledged by " MACSTR,
+		   MAC2STR(mgmt->sa), MAC2STR(mgmt->da));
+	if (os_memcmp(mgmt->sa, mgmt->bssid, ETH_ALEN) == 0) {
+		int c;
+		c = wt->last_mgmt_valid ?
+			WLANTEST_STA_COUNTER_VALID_DEAUTH_RX_ACK :
+			WLANTEST_STA_COUNTER_INVALID_DEAUTH_RX_ACK;
+		sta->counters[c]++;
+	}
+}
+
+
+static void rx_mgmt_disassoc_ack(struct wlantest *wt,
+				 const struct ieee80211_hdr *hdr)
+{
+	const struct ieee80211_mgmt *mgmt;
+	struct wlantest_bss *bss;
+	struct wlantest_sta *sta;
+
+	mgmt = (const struct ieee80211_mgmt *) hdr;
+	bss = bss_get(wt, mgmt->bssid);
+	if (bss == NULL)
+		return;
+	if (os_memcmp(mgmt->sa, mgmt->bssid, ETH_ALEN) == 0)
+		sta = sta_get(bss, mgmt->da);
+	else
+		sta = sta_get(bss, mgmt->sa);
+	if (sta == NULL)
+		return;
+
+	wpa_printf(MSG_DEBUG, "DISASSOC from " MACSTR " acknowledged by "
+		   MACSTR, MAC2STR(mgmt->sa), MAC2STR(mgmt->da));
+	if (os_memcmp(mgmt->sa, mgmt->bssid, ETH_ALEN) == 0) {
+		int c;
+		c = wt->last_mgmt_valid ?
+			WLANTEST_STA_COUNTER_VALID_DISASSOC_RX_ACK :
+			WLANTEST_STA_COUNTER_INVALID_DISASSOC_RX_ACK;
+		sta->counters[c]++;
+	}
+}
+
+
+void rx_mgmt_ack(struct wlantest *wt, const struct ieee80211_hdr *hdr)
+{
+	u16 fc, stype;
+	fc = le_to_host16(hdr->frame_control);
+	stype = WLAN_FC_GET_STYPE(fc);
+
+	wpa_printf(MSG_MSGDUMP, "MGMT ACK: stype=%u a1=" MACSTR " a2=" MACSTR
+		   " a3=" MACSTR,
+		   stype, MAC2STR(hdr->addr1), MAC2STR(hdr->addr2),
+		   MAC2STR(hdr->addr3));
+
+	switch (stype) {
+	case WLAN_FC_STYPE_DEAUTH:
+		rx_mgmt_deauth_ack(wt, hdr);
+		break;
+	case WLAN_FC_STYPE_DISASSOC:
+		rx_mgmt_disassoc_ack(wt, hdr);
+		break;
+	}
 }

wlantest/wlantest.h

@@ -160,6 +160,10 @@ struct wlantest {
 	void *write_pcap; /* pcap_t* */
 	void *write_pcap_dumper; /* pcpa_dumper_t */
 	struct timeval write_pcap_time;
+
+	u8 last_hdr[30];
+	size_t last_len;
+	int last_mgmt_valid;
 };
 
 int read_cap_file(struct wlantest *wt, const char *fname);
@@ -178,6 +182,7 @@ int monitor_init(struct wlantest *wt, const char *ifname);
 int monitor_init_wired(struct wlantest *wt, const char *ifname);
 void monitor_deinit(struct wlantest *wt);
 void rx_mgmt(struct wlantest *wt, const u8 *data, size_t len);
+void rx_mgmt_ack(struct wlantest *wt, const struct ieee80211_hdr *hdr);
 void rx_data(struct wlantest *wt, const u8 *data, size_t len);
 void rx_data_eapol(struct wlantest *wt, const u8 *dst, const u8 *src,
 		   const u8 *data, size_t len, int prot);

wlantest/wlantest_cli.c

@@ -540,6 +540,13 @@ static const struct sta_counters sta_counters[] = {
 	{ "assocresp_comeback", WLANTEST_STA_COUNTER_ASSOCRESP_COMEBACK },
 	{ "reassocresp_comeback", WLANTEST_STA_COUNTER_REASSOCRESP_COMEBACK },
 	{ "ping_ok_first_assoc", WLANTEST_STA_COUNTER_PING_OK_FIRST_ASSOC },
+	{ "valid_deauth_rx_ack", WLANTEST_STA_COUNTER_VALID_DEAUTH_RX_ACK },
+	{ "valid_disassoc_rx_ack",
+	  WLANTEST_STA_COUNTER_VALID_DISASSOC_RX_ACK },
+	{ "invalid_deauth_rx_ack",
+	  WLANTEST_STA_COUNTER_INVALID_DEAUTH_RX_ACK },
+	{ "invalid_disassoc_rx_ack",
+	  WLANTEST_STA_COUNTER_INVALID_DISASSOC_RX_ACK },
 	{ NULL, 0 }
 };
 

wlantest/wlantest_ctrl.h

@@ -97,6 +97,10 @@ enum wlantest_sta_counter {
 	WLANTEST_STA_COUNTER_ASSOCRESP_COMEBACK,
 	WLANTEST_STA_COUNTER_REASSOCRESP_COMEBACK,
 	WLANTEST_STA_COUNTER_PING_OK_FIRST_ASSOC,
+	WLANTEST_STA_COUNTER_VALID_DEAUTH_RX_ACK,
+	WLANTEST_STA_COUNTER_VALID_DISASSOC_RX_ACK,
+	WLANTEST_STA_COUNTER_INVALID_DEAUTH_RX_ACK,
+	WLANTEST_STA_COUNTER_INVALID_DISASSOC_RX_ACK,
 	NUM_WLANTEST_STA_COUNTER
 };