[修改] 增加freeRTOS

1. 版本FreeRTOSv202212.01，命名为kernel；

kernel/FreeRTOS-Plus/Source/FreeRTOS-Plus-TCP/source/include/FreeRTOS_DNS.h

@@ -0,0 +1,102 @@
+/*
+ * FreeRTOS+TCP V3.1.0
+ * Copyright (C) 2022 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * https://github.com/FreeRTOS
+ * https://www.FreeRTOS.org
+ */
+
+#ifndef FREERTOS_DNS_H
+#define FREERTOS_DNS_H
+
+/* *INDENT-OFF* */
+#ifdef __cplusplus
+    extern "C" {
+#endif
+/* *INDENT-ON* */
+
+/* Application level configuration options. */
+#include "FreeRTOS_DNS_Globals.h"
+#include "FreeRTOS_DNS_Callback.h"
+#include "FreeRTOS_DNS_Cache.h"
+
+/*
+ * LLMNR is very similar to DNS, so is handled by the DNS routines.
+ */
+uint32_t ulDNSHandlePacket( const NetworkBufferDescriptor_t * pxNetworkBuffer );
+
+#if ( ipconfigUSE_LLMNR == 1 )
+    /* The LLMNR MAC address is 01:00:5e:00:00:fc */
+    extern const MACAddress_t xLLMNR_MacAdress;
+#endif /* ipconfigUSE_LLMNR */
+
+#if ( ipconfigUSE_NBNS != 0 )
+
+/*
+ * Inspect a NetBIOS Names-Service message.  If the name matches with ours
+ * (xApplicationDNSQueryHook returns true) an answer will be sent back.
+ * Note that LLMNR is a better protocol for name services on a LAN as it is
+ * less polluted
+ */
+    uint32_t ulNBNSHandlePacket( NetworkBufferDescriptor_t * pxNetworkBuffer );
+
+#endif /* ipconfigUSE_NBNS */
+
+
+#if ( ipconfigDNS_USE_CALLBACKS != 0 )
+
+/*
+ * Asynchronous version of gethostbyname()
+ * xTimeout is in units of ms.
+ */
+    uint32_t FreeRTOS_gethostbyname_a( const char * pcHostName,
+                                       FOnDNSEvent pCallback,
+                                       void * pvSearchID,
+                                       TickType_t uxTimeout );
+    void FreeRTOS_gethostbyname_cancel( void * pvSearchID );
+
+
+#endif /* if ( ipconfigDNS_USE_CALLBACKS != 0 ) */
+
+/*
+ * Lookup a IPv4 node in a blocking-way.
+ * It returns a 32-bit IP-address, 0 when not found.
+ * gethostbyname() is already deprecated.
+ */
+uint32_t FreeRTOS_gethostbyname( const char * pcHostName );
+
+#if ( ipconfigDNS_USE_CALLBACKS == 1 )
+
+/*
+ * The function vDNSInitialise() initialises the DNS module.
+ * It will be called "internally", by the IP-task.
+ */
+    void vDNSInitialise( void );
+#endif /* ( ipconfigDNS_USE_CALLBACKS == 1 ) */
+
+/* *INDENT-OFF* */
+#ifdef __cplusplus
+    } /* extern "C" */
+#endif
+/* *INDENT-ON* */
+
+#endif /* FREERTOS_DNS_H */