[at][sal] Add query and unregistered protocol family functions

components/net/sal_socket/impl/af_inet.h

@@ -0,0 +1,40 @@
+/*
+ * File      : af_inet.h
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2006 - 2018, RT-Thread Development Team
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2018-08-25     ChenYong     First version
+ */
+
+#ifndef __AF_INET_H__
+#define __AF_INET_H__
+
+#include <rtthread.h>
+
+#ifdef SAL_USING_LWIP
+/* lwIP protocol family register */
+int lwip_inet_init(void);
+#endif
+
+#ifdef SAL_USING_AT
+/* AT protocol family register */
+int at_inet_init(void);
+#endif
+
+#endif /* __AF_INET_H__ */

components/net/sal_socket/impl/af_inet_at.c

@@ -26,6 +26,7 @@
 #include <sal.h>
 
 #include <at_socket.h>
+#include <af_inet.h>
 
 #ifdef SAL_USING_POSIX
 #include <dfs_poll.h>
@@ -107,6 +108,7 @@ static int at_create(struct sal_socket *socket, int type, int protocol)
 }
 
 static const struct proto_family at_inet_family_ops = {
+    "at",
     AF_AT,
     AF_INET,
     at_create,

components/net/sal_socket/impl/af_inet_lwip.c

@@ -34,6 +34,7 @@
 #endif
 
 #include <sal.h>
+#include <af_inet.h>
 
 #if LWIP_VERSION < 0x2000000
 #define SELWAIT_T int
@@ -284,6 +285,7 @@ static int inet_create(struct sal_socket *socket, int type, int protocol)
 }
 
 static const struct proto_family lwip_inet_family_ops = {
+    "lwip",
     AF_INET,
     AF_INET,
     inet_create,