HS 2.0: Remove temporary network block on cred block removal

If the credential that was used to create a temporary HS 2.0 network
block is removed, remove the network block, too.

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

wpa_supplicant/config_ssid.h

@@ -542,6 +542,15 @@ struct wpa_ssid {
 	 * disabled_until - Network block disabled until this time if non-zero
 	 */
 	struct os_time disabled_until;
+
+	/**
+	 * parent_cred - Pointer to parent wpa_cred entry
+	 *
+	 * This pointer can be used to delete temporary networks when a wpa_cred
+	 * that was used to create them is removed. This pointer should not be
+	 * dereferences since it may not be updated in all cases.
+	 */
+	void *parent_cred;
 };
 
 #endif /* CONFIG_SSID_H */

wpa_supplicant/ctrl_iface.c

@@ -2306,20 +2306,48 @@ static int wpa_supplicant_ctrl_iface_add_cred(struct wpa_supplicant *wpa_s,
 }
 
 
+static int wpas_ctrl_remove_cred(struct wpa_supplicant *wpa_s,
+				 struct wpa_cred *cred)
+{
+	struct wpa_ssid *ssid;
+	char str[20];
+
+	if (cred == NULL || wpa_config_remove_cred(wpa_s->conf, cred->id) < 0) {
+		wpa_printf(MSG_DEBUG, "CTRL_IFACE: Could not find cred");
+		return -1;
+	}
+
+	/* Remove any network entry created based on the removed credential */
+	ssid = wpa_s->conf->ssid;
+	while (ssid) {
+		if (ssid->parent_cred == cred) {
+			wpa_printf(MSG_DEBUG, "Remove network id %d since it "
+				   "used the removed credential", ssid->id);
+			os_snprintf(str, sizeof(str), "%d", ssid->id);
+			ssid = ssid->next;
+			wpa_supplicant_ctrl_iface_remove_network(wpa_s, str);
+		} else
+			ssid = ssid->next;
+	}
+
+	return 0;
+}
+
+
 static int wpa_supplicant_ctrl_iface_remove_cred(struct wpa_supplicant *wpa_s,
 						 char *cmd)
 {
 	int id;
-	struct wpa_cred *cred;
+	struct wpa_cred *cred, *prev;
 
 	/* cmd: "<cred id>" or "all" */
 	if (os_strcmp(cmd, "all") == 0) {
 		wpa_printf(MSG_DEBUG, "CTRL_IFACE: REMOVE_CRED all");
 		cred = wpa_s->conf->cred;
 		while (cred) {
-			id = cred->id;
+			prev = cred;
 			cred = cred->next;
-			wpa_config_remove_cred(wpa_s->conf, id);
+			wpas_ctrl_remove_cred(wpa_s, prev);
 		}
 		return 0;
 	}
@@ -2328,14 +2356,7 @@ static int wpa_supplicant_ctrl_iface_remove_cred(struct wpa_supplicant *wpa_s,
 	wpa_printf(MSG_DEBUG, "CTRL_IFACE: REMOVE_CRED id=%d", id);
 
 	cred = wpa_config_get_cred(wpa_s->conf, id);
-	if (cred == NULL ||
-	    wpa_config_remove_cred(wpa_s->conf, id) < 0) {
-		wpa_printf(MSG_DEBUG, "CTRL_IFACE: Could not find cred id=%d",
-			   id);
-		return -1;
-	}
-
-	return 0;
+	return wpas_ctrl_remove_cred(wpa_s, cred);
 }
 
 

wpa_supplicant/interworking.c

@@ -786,6 +786,7 @@ static int interworking_connect_3gpp(struct wpa_supplicant *wpa_s,
 	ssid = wpa_config_add_network(wpa_s->conf);
 	if (ssid == NULL)
 		return -1;
+	ssid->parent_cred = cred;
 
 	wpas_notify_network_added(wpa_s, ssid);
 	wpa_config_set_network_defaults(ssid);
@@ -1095,6 +1096,7 @@ static int interworking_connect_roaming_consortium(
 	ssid = wpa_config_add_network(wpa_s->conf);
 	if (ssid == NULL)
 		return -1;
+	ssid->parent_cred = cred;
 	wpas_notify_network_added(wpa_s, ssid);
 	wpa_config_set_network_defaults(ssid);
 	ssid->priority = cred->priority;
@@ -1209,6 +1211,7 @@ int interworking_connect(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
 		nai_realm_free(realm, count);
 		return -1;
 	}
+	ssid->parent_cred = cred;
 	wpas_notify_network_added(wpa_s, ssid);
 	wpa_config_set_network_defaults(ssid);
 	ssid->priority = cred->priority;