wifi: mac80211: kunit: extend MFP tests

Extend the MFP tests to handle the case of deauth/disassoc
and robust action frames (that are not protected dual of
public action frames).
Reviewed-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://msgid.link/20231220151952.415232-6-benjamin@sipsolutions.netSigned-off-by: Johannes Berg <johannes.berg@intel.com>

net/mac80211/tests/mfp.c

@@ -13,7 +13,7 @@ MODULE_IMPORT_NS(EXPORTED_FOR_KUNIT_TESTING);
 
 static const struct mfp_test_case {
 	const char *desc;
-	bool sta, mfp, decrypted, unicast;
+	bool sta, mfp, decrypted, unicast, assoc;
 	u8 category;
 	u8 stype;
 	u8 action;
@@ -151,13 +151,67 @@ static const struct mfp_test_case {
 		.mfp = true,
 		.result = RX_CONTINUE,
 	},
+	/* deauth/disassoc before keys are set */
+	{
+		.desc = "deauth: accept unicast with MFP but w/o key",
+		.stype = IEEE80211_STYPE_DEAUTH,
+		.sta = true,
+		.mfp = true,
+		.unicast = true,
+		.result = RX_CONTINUE,
+	},
+	{
+		.desc = "disassoc: accept unicast with MFP but w/o key",
+		.stype = IEEE80211_STYPE_DEAUTH,
+		.sta = true,
+		.mfp = true,
+		.unicast = true,
+		.result = RX_CONTINUE,
+	},
+	/* non-public robust action frame ... */
+	{
+		.desc = "BA action: drop unicast before assoc",
+		.stype = IEEE80211_STYPE_ACTION,
+		.category = WLAN_CATEGORY_BACK,
+		.unicast = true,
+		.sta = true,
+		.result = RX_DROP_U_UNPROT_ROBUST_ACTION,
+	},
+	{
+		.desc = "BA action: drop unprotected after assoc",
+		.stype = IEEE80211_STYPE_ACTION,
+		.category = WLAN_CATEGORY_BACK,
+		.unicast = true,
+		.sta = true,
+		.mfp = true,
+		.result = RX_DROP_U_UNPROT_UCAST_MGMT,
+	},
+	{
+		.desc = "BA action: accept unprotected without MFP",
+		.stype = IEEE80211_STYPE_ACTION,
+		.category = WLAN_CATEGORY_BACK,
+		.unicast = true,
+		.sta = true,
+		.assoc = true,
+		.mfp = false,
+		.result = RX_CONTINUE,
+	},
+	{
+		.desc = "BA action: drop unprotected with MFP",
+		.stype = IEEE80211_STYPE_ACTION,
+		.category = WLAN_CATEGORY_BACK,
+		.unicast = true,
+		.sta = true,
+		.mfp = true,
+		.result = RX_DROP_U_UNPROT_UCAST_MGMT,
+	},
 };
 
 KUNIT_ARRAY_PARAM_DESC(accept_mfp, accept_mfp_cases, desc);
 
 static void accept_mfp(struct kunit *test)
 {
-	static struct sta_info sta = {};
+	static struct sta_info sta;
 	const struct mfp_test_case *params = test->param_value;
 	struct ieee80211_rx_data rx = {
 		.sta = params->sta ? &sta : NULL,
@@ -171,6 +225,8 @@ static void accept_mfp(struct kunit *test)
 		/* A3/BSSID doesn't matter here */
 	};
 
+	memset(&sta, 0, sizeof(sta));
+
 	if (!params->sta) {
 		KUNIT_ASSERT_FALSE(test, params->mfp);
 		KUNIT_ASSERT_FALSE(test, params->decrypted);
@@ -179,6 +235,9 @@ static void accept_mfp(struct kunit *test)
 	if (params->mfp)
 		set_sta_flag(&sta, WLAN_STA_MFP);
 
+	if (params->assoc)
+		set_bit(WLAN_STA_ASSOC, &sta._flags);
+
 	rx.skb = kunit_zalloc_skb(test, 128, GFP_KERNEL);
 	KUNIT_ASSERT_NOT_NULL(test, rx.skb);
 	status = IEEE80211_SKB_RXCB(rx.skb);
@@ -200,11 +259,18 @@ static void accept_mfp(struct kunit *test)
 		skb_put_u8(rx.skb, params->category);
 		skb_put_u8(rx.skb, params->action);
 		break;
+	case IEEE80211_STYPE_DEAUTH:
+	case IEEE80211_STYPE_DISASSOC: {
+		__le16 reason = cpu_to_le16(WLAN_REASON_UNSPECIFIED);
+
+		skb_put_data(rx.skb, &reason, sizeof(reason));
+		}
+		break;
 	}
 
 	KUNIT_EXPECT_EQ(test,
-			ieee80211_drop_unencrypted_mgmt(&rx),
-			params->result);
+			(__force u32)ieee80211_drop_unencrypted_mgmt(&rx),
+			(__force u32)params->result);
 }
 
 static struct kunit_case mfp_test_cases[] = {