diff --git a/src/wtp/kmod/capwap_private.c b/src/wtp/kmod/capwap_private.c
index 8b249ef..d9b16f9 100644
--- a/src/wtp/kmod/capwap_private.c
+++ b/src/wtp/kmod/capwap_private.c
@@ -13,7 +13,7 @@
 static struct sc_capwap_session sc_acsession;
 
 /* */
-int sc_capwap_init(uint32_t threads) {
+int sc_capwap_init(void) {
 	TRACEKMOD("### sc_capwap_init\n");
 
 	/* Init session */
diff --git a/src/wtp/kmod/capwap_private.h b/src/wtp/kmod/capwap_private.h
index da04a7d..ad4c70a 100644
--- a/src/wtp/kmod/capwap_private.h
+++ b/src/wtp/kmod/capwap_private.h
@@ -10,7 +10,7 @@ struct sc_capwap_workthread {
 };
 
 /* */
-int sc_capwap_init(uint32_t threads);
+int sc_capwap_init(void);
 void sc_capwap_close(void);
 
 /* */
diff --git a/src/wtp/kmod/netlinkapp.c b/src/wtp/kmod/netlinkapp.c
index a9342b4..4a5de0a 100644
--- a/src/wtp/kmod/netlinkapp.c
+++ b/src/wtp/kmod/netlinkapp.c
@@ -246,22 +246,23 @@ static int sc_netlink_link(struct sk_buff* skb, struct genl_info* info) {
 
 	TRACEKMOD("### sc_netlink_link\n");
 
-	if (!sc_netlink_usermodeid) {
-		/* Initialize library */
-		ret = sc_capwap_init(1);
-		if (!ret) {
-			sc_netlink_usermodeid = portid;
-
-			/* Deny unload module */
-			try_module_get(THIS_MODULE);
-		}
-	} else if (sc_netlink_usermodeid == portid) {
-		ret = -EALREADY;
-	} else {
-		ret = -EBUSY;
+	/* */
+	if (sc_netlink_usermodeid) {
+		TRACEKMOD("*** Busy kernel link\n");
+		return -EBUSY;
 	}
 
-	return ret;
+	/* Initialize library */
+	ret = sc_capwap_init();
+	if (ret) {
+		return ret;
+	}
+
+	/* Deny unload module */
+	sc_netlink_usermodeid = portid;
+	try_module_get(THIS_MODULE);
+
+	return 0;
 }
 
 /* */
@@ -269,7 +270,7 @@ static int sc_netlink_reset(struct sk_buff* skb, struct genl_info* info) {
 	TRACEKMOD("### sc_netlink_reset\n");
 
 	/* Check Link */
-	if (sc_netlink_usermodeid != genl_info_snd_portid(info)) {
+	if (!sc_netlink_usermodeid) {
 		return -ENOLINK;
 	}
 
@@ -286,21 +287,19 @@ static int sc_netlink_reset(struct sk_buff* skb, struct genl_info* info) {
 static int sc_netlink_notify(struct notifier_block* nb, unsigned long state, void* _notify) {
 	struct netlink_notify* notify = (struct netlink_notify*)_notify;
 
-	if (state == NETLINK_URELEASE) {
+	if ((state == NETLINK_URELEASE) && (sc_netlink_usermodeid == netlink_notify_portid(notify))) {
 		rtnl_lock();
 
-		if (sc_netlink_usermodeid == netlink_notify_portid(notify)) {
-			sc_netlink_usermodeid = 0;
+		sc_netlink_usermodeid = 0;
 
-			/* Close all devices */
-			sc_netlink_unregister_alldevice();
+		/* Close all devices */
+		sc_netlink_unregister_alldevice();
 
-			/* Close capwap engine */
-			sc_capwap_close();
+		/* Close capwap engine */
+		sc_capwap_close();
 
-			/* Allow unload module */
-			module_put(THIS_MODULE);
-		}
+		/* Allow unload module */
+		module_put(THIS_MODULE);
 
 		rtnl_unlock();
 	}
@@ -315,7 +314,7 @@ static int sc_netlink_bind(struct sk_buff* skb, struct genl_info* info) {
 	TRACEKMOD("### sc_netlink_bind\n");
 
 	/* Check Link */
-	if (sc_netlink_usermodeid != genl_info_snd_portid(info)) {
+	if (!sc_netlink_usermodeid) {
 		return -ENOLINK;
 	}
 
@@ -343,7 +342,7 @@ static int sc_netlink_connect(struct sk_buff* skb, struct genl_info* info) {
 	TRACEKMOD("### sc_netlink_connect\n");
 
 	/* Check Link */
-	if (sc_netlink_usermodeid != genl_info_snd_portid(info)) {
+	if (!sc_netlink_usermodeid) {
 		return -ENOLINK;
 	}
 
@@ -388,7 +387,7 @@ static int sc_netlink_send_keepalive(struct sk_buff* skb, struct genl_info* info
 	TRACEKMOD("### sc_netlink_send_keepalive\n");
 
 	/* Check Link */
-	if (sc_netlink_usermodeid != genl_info_snd_portid(info)) {
+	if (!sc_netlink_usermodeid) {
 		return -ENOLINK;
 	}
 
@@ -418,7 +417,7 @@ static int sc_netlink_send_data(struct sk_buff* skb, struct genl_info* info) {
 	TRACEKMOD("### sc_netlink_send_data\n");
 
 	/* Check Link */
-	if (sc_netlink_usermodeid != genl_info_snd_portid(info)) {
+	if (!sc_netlink_usermodeid) {
 		return -ENOLINK;
 	} else if (!info->attrs[NLSMARTCAPWAP_ATTR_RADIOID] || !info->attrs[NLSMARTCAPWAP_ATTR_DATA_FRAME]) {
 		return -EINVAL;
@@ -494,7 +493,7 @@ static int sc_netlink_join_mac80211_device(struct sk_buff* skb, struct genl_info
 	TRACEKMOD("### sc_netlink_join_mac80211_device\n");
 
 	/* Check Link */
-	if (sc_netlink_usermodeid != genl_info_snd_portid(info)) {
+	if (!sc_netlink_usermodeid) {
 		return -ENOLINK;
 	}
 
@@ -551,7 +550,7 @@ static int sc_netlink_leave_mac80211_device(struct sk_buff* skb, struct genl_inf
 	TRACEKMOD("### sc_netlink_leave_mac80211_device\n");
 
 	/* Check Link */
-	if (sc_netlink_usermodeid != genl_info_snd_portid(info)) {
+	if (!sc_netlink_usermodeid) {
 		return -ENOLINK;
 	}
 
diff --git a/src/wtp/wtp_kmod.c b/src/wtp/wtp_kmod.c
index efd48af..a423c96 100644
--- a/src/wtp/wtp_kmod.c
+++ b/src/wtp/wtp_kmod.c
@@ -150,7 +150,7 @@ static int wtp_kmod_send_and_recv(struct nl_sock* nl, struct nl_cb* nl_cb, struc
 
 /* */
 static int wtp_kmod_send_and_recv_msg(struct nl_msg* msg, wtp_kmod_valid_cb valid_cb, void* data) {
-	return wtp_kmod_send_and_recv(g_wtp.kmodhandle.nl, g_wtp.kmodhandle.nl_cb, msg, valid_cb, data);
+	return wtp_kmod_send_and_recv(g_wtp.kmodhandle.nlmsg, g_wtp.kmodhandle.nlmsg_cb, msg, valid_cb, data);
 }
 
 /* */
@@ -168,7 +168,7 @@ static int wtp_kmod_link(void) {
 	genlmsg_put(msg, 0, 0, g_wtp.kmodhandle.nlsmartcapwap_id, 0, 0, NLSMARTCAPWAP_CMD_LINK, 0);
 
 	/* */
-	result = wtp_kmod_send_and_recv_msg(msg, NULL, NULL);
+	result = wtp_kmod_send_and_recv(g_wtp.kmodhandle.nl, g_wtp.kmodhandle.nl_cb, msg, NULL, NULL);
 	if (result) {
 		if (result == -EALREADY) {
 			result = 0;
@@ -536,6 +536,20 @@ int wtp_kmod_init(void) {
 		return result;
 	}
 
+	/* Configure netlink message socket */
+	g_wtp.kmodhandle.nlmsg_cb = nl_cb_alloc(NL_CB_DEFAULT);
+	if (!g_wtp.kmodhandle.nlmsg_cb) {
+		wtp_kmod_free();
+		return -1;
+	}
+
+	/* */
+	g_wtp.kmodhandle.nlmsg = nl_create_handle(g_wtp.kmodhandle.nlmsg_cb);
+	if (!g_wtp.kmodhandle.nlmsg) {
+		wtp_kmod_free();
+		return -1;
+	}
+
 	/* */
 	g_wtp.kmodhandle.interfaces = capwap_list_create();
 	return 0;
@@ -556,6 +570,14 @@ void wtp_kmod_free(void) {
 		capwap_list_free(g_wtp.kmodhandle.interfaces);
 	}
 
+	if (g_wtp.kmodhandle.nlmsg) {
+		nl_socket_free(g_wtp.kmodhandle.nlmsg);
+	}
+
+	if (g_wtp.kmodhandle.nlmsg_cb) {
+		nl_cb_put(g_wtp.kmodhandle.nlmsg_cb);
+	}
+
 	if (g_wtp.kmodhandle.nl) {
 		nl_socket_free(g_wtp.kmodhandle.nl);
 	}
diff --git a/src/wtp/wtp_kmod.h b/src/wtp/wtp_kmod.h
index 98e9b1b..46c49e1 100644
--- a/src/wtp/wtp_kmod.h
+++ b/src/wtp/wtp_kmod.h
@@ -25,6 +25,10 @@ struct wtp_kmod_handle {
 	struct nl_cb* nl_cb;
 	int nlsmartcapwap_id;
 
+	/* */
+	struct nl_sock* nlmsg;
+	struct nl_cb* nlmsg_cb;
+
 	/* */
 	struct capwap_list* interfaces;
 };