Add Network Down event in EMACHandler Task

README.md

@@ -11,12 +11,12 @@ release.**
 
 ## Getting started
 The easiest way to use version 4.0.0 and later of FreeRTOS-Plus-TCP is to refer the Getting started Guide (found [here](https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/blob/main/GettingStarted.md))
-Another way is to start with the pre-configured IPv4 Windows Simulator demo (found in [this directory](https://github.com/FreeRTOS/FreeRTOS/tree/main/FreeRTOS-Plus/Demo/FreeRTOS_Plus_TCP_Minimal_Windows_Simulator)) or IPv6 Multi-endpoint Windows Simulator demo (found in [this directory](https://github.com/FreeRTOS/FreeRTOS/tree/main/FreeRTOS-Plus/Demo/FreeRTOS_Plus_TCP_IPv6_Demo/IPv6_Multi_WinSim_demo)). That way you will have the correct FreeRTOS source files included, and the correct include paths configured. Once a demo application is building and executing you can remove the demo application files, and start to add in your own application source files. See the [FreeRTOS Kernel Quick Start Guide](https://www.freertos.org/FreeRTOS-quick-start-guide.html) for detailed instructions and other useful links.
+Another way is to start with the pre-configured IPv4 Windows Simulator demo (found in [this directory](https://github.com/FreeRTOS/FreeRTOS/tree/main/FreeRTOS-Plus/Demo/FreeRTOS_Plus_TCP_Minimal_Windows_Simulator)) or IPv6 Multi-endpoint Windows Simulator demo (found in [this directory](https://github.com/FreeRTOS/FreeRTOS/tree/main/FreeRTOS-Plus/Demo/FreeRTOS_Plus_TCP_IPv6_Demo/IPv6_Multi_WinSim_demo)). That way you will have the correct FreeRTOS source files included, and the correct include paths configured. Once a demo application is building and executing you can remove the demo application files, and start to add in your own application source files. See the [FreeRTOS Kernel Quick Start Guide](https://www.freertos.org/Documentation/01-FreeRTOS-quick-start/01-Beginners-guide/02-Quick-start-guide) for detailed instructions and other useful links.
 
 Additionally, for FreeRTOS-Plus-TCP source code organization refer to the [Documentation](http://www.FreeRTOS.org/FreeRTOS-Plus/FreeRTOS_Plus_TCP/TCP_Networking_Tutorial.html), and [API Reference](https://freertos.org/Documentation/03-Libraries/02-FreeRTOS-plus/02-FreeRTOS-plus-TCP/09-API-reference/01-FreeRTOS-plus-TCP-APIs).
 
 ### Getting help
-If you have any questions or need assistance troubleshooting your FreeRTOS project, we have an active community that can help on the [FreeRTOS Community Support Forum](https://forums.freertos.org). Please also refer to [FAQ](http://www.freertos.org/FAQHelp.html) for frequently asked questions.
+If you have any questions or need assistance troubleshooting your FreeRTOS project, we have an active community that can help on the [FreeRTOS Community Support Forum](https://forums.freertos.org). Please also refer to [FAQ](https://www.freertos.org/Why-FreeRTOS/FAQs) for frequently asked questions.
 
 Also see the [Submitting a bugs/feature request](https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/blob/main/.github/CONTRIBUTING.md#submitting-a-bugsfeature-request) section of CONTRIBUTING.md for more details.
 
@@ -91,7 +91,7 @@ git submodule update --checkout --init --recursive tools/CMock test/FreeRTOS-Ker
 ```
 
 ## Porting
-The porting guide is available on [this page](http://www.FreeRTOS.org/FreeRTOS-Plus/FreeRTOS_Plus_TCP/FreeRTOS_TCP_Porting.html).
+The porting guide is available on [this page](https://www.freertos.org/Documentation/03-Libraries/02-FreeRTOS-plus/02-FreeRTOS-plus-TCP/10-Porting/01-FreeRTOS_TCP_Porting).
 
 ## Repository structure
 This repository contains the FreeRTOS-Plus-TCP repository and a number of supplementary libraries for testing/PR Checks.

readme.txt

@@ -7,7 +7,7 @@ A description of the source code organisation is available on:
 http://www.FreeRTOS.org/FreeRTOS-Plus/FreeRTOS_Plus_TCP/TCP_Networking_Tutorial.html
 
 The porting guide is available on:
-http://www.FreeRTOS.org/FreeRTOS-Plus/FreeRTOS_Plus_TCP/FreeRTOS_TCP_Porting.html
+https://www.freertos.org/Documentation/03-Libraries/02-FreeRTOS-plus/02-FreeRTOS-plus-TCP/10-Porting/01-FreeRTOS_TCP_Porting
 
 License information is available on:
 http://www.FreeRTOS.org/FreeRTOS-Plus/FreeRTOS_Plus_TCP/FreeRTOS_Plus_TCP_License.html

source/include/FreeRTOS_IP.h

@@ -307,7 +307,7 @@ uint32_t FreeRTOS_round_down( uint32_t a,
 /*
  * FULL, UP-TO-DATE AND MAINTAINED REFERENCE DOCUMENTATION FOR ALL THESE
  * FUNCTIONS IS AVAILABLE ON THE FOLLOWING URL:
- * http://www.FreeRTOS.org/FreeRTOS-Plus/FreeRTOS_Plus_TCP/FreeRTOS_TCP_API_Functions.html
+ * https://freertos.org/Documentation/03-Libraries/02-FreeRTOS-plus/02-FreeRTOS-plus-TCP/09-API-reference/01-FreeRTOS-plus-TCP-APIs
  */
 
 /* FreeRTOS_IPInit_Multi() replaces the earlier FreeRTOS_IPInit(). It assumes

source/include/FreeRTOS_Sockets.h

@@ -199,7 +199,7 @@
 /**
  * FULL, UP-TO-DATE AND MAINTAINED REFERENCE DOCUMENTATION FOR ALL THESE
  * FUNCTIONS IS AVAILABLE ON THE FOLLOWING URL:
- * http://www.FreeRTOS.org/FreeRTOS-Plus/FreeRTOS_Plus_TCP/FreeRTOS_TCP_API_Functions.html
+ * https://freertos.org/Documentation/03-Libraries/02-FreeRTOS-plus/02-FreeRTOS-plus-TCP/09-API-reference/01-FreeRTOS-plus-TCP-APIs
  */
 
 /* Common Socket Attributes. */

source/include/IPTraceMacroDefaults.h

@@ -29,7 +29,7 @@
  * @file IPTraceMacroDefaults.h
  * @brief This file provides default (empty) implementations for any IP trace
  * macros that are not defined by the user. See
- * http://www.FreeRTOS.org/FreeRTOS-Plus/FreeRTOS_Plus_TCP/TCP_IP_Trace.html
+ * https://freertos.org/Documentation/03-Libraries/02-FreeRTOS-plus/02-FreeRTOS-plus-TCP/08-Trace-macros
  */
 
 #ifndef IP_TRACE_MACRO_DEFAULTS_H

source/portable/BufferManagement/BufferAllocation_1.c

@@ -29,7 +29,7 @@
 *
 * See the following web page for essential buffer allocation scheme usage and
 * configuration details:
-* http://www.FreeRTOS.org/FreeRTOS-Plus/FreeRTOS_Plus_TCP/Embedded_Ethernet_Buffer_Management.html
+* https://freertos.org/Documentation/03-Libraries/02-FreeRTOS-plus/02-FreeRTOS-plus-TCP/05-Buffer-management
 *
 ******************************************************************************/
 

source/portable/BufferManagement/BufferAllocation_2.c

@@ -31,7 +31,7 @@
 *
 * See the following web page for essential buffer allocation scheme usage and
 * configuration details:
-* http://www.FreeRTOS.org/FreeRTOS-Plus/FreeRTOS_Plus_TCP/Embedded_Ethernet_Buffer_Management.html
+* https://freertos.org/Documentation/03-Libraries/02-FreeRTOS-plus/02-FreeRTOS-plus-TCP/05-Buffer-management
 *
 ******************************************************************************/
 

source/portable/Compiler/CompilerName/pack_struct_end.h

@@ -28,7 +28,7 @@
 /*****************************************************************************
 *
 * See the following URL for an explanation of this file:
-* http://www.FreeRTOS.org/FreeRTOS-Plus/FreeRTOS_Plus_TCP/Embedded_Compiler_Porting.html
+* https://freertos.org/Documentation/03-Libraries/02-FreeRTOS-plus/02-FreeRTOS-plus-TCP/10-Porting/02-Embedded_Compiler_Porting
 *
 *****************************************************************************/
 ; /* FIX ME. Update for the compiler specifier needed at end of a struct declaration to pack the struct. */

source/portable/Compiler/CompilerName/pack_struct_start.h

@@ -28,7 +28,7 @@
 /*****************************************************************************
 *
 * See the following URL for an explanation of this file:
-* http://www.FreeRTOS.org/FreeRTOS-Plus/FreeRTOS_Plus_TCP/Embedded_Compiler_Porting.html
+* https://freertos.org/Documentation/03-Libraries/02-FreeRTOS-plus/02-FreeRTOS-plus-TCP/10-Porting/02-Embedded_Compiler_Porting
 *
 *****************************************************************************/
 /* FIX ME. Update for the compiler specifier needed at the start of a struct declaration to pack the struct. */

source/portable/Compiler/GCC/pack_struct_end.h

@@ -28,7 +28,7 @@
 /*****************************************************************************
 *
 * See the following URL for an explanation of this file:
-* http://www.FreeRTOS.org/FreeRTOS-Plus/FreeRTOS_Plus_TCP/Embedded_Compiler_Porting.html
+* https://freertos.org/Documentation/03-Libraries/02-FreeRTOS-plus/02-FreeRTOS-plus-TCP/10-Porting/02-Embedded_Compiler_Porting
 *
 *****************************************************************************/
 __attribute__( ( packed ) );

source/portable/Compiler/GCC/pack_struct_start.h

@@ -28,7 +28,7 @@
 /*****************************************************************************
 *
 * See the following URL for an explanation of this file:
-* http://www.FreeRTOS.org/FreeRTOS-Plus/FreeRTOS_Plus_TCP/Embedded_Compiler_Porting.html
+* https://freertos.org/Documentation/03-Libraries/02-FreeRTOS-plus/02-FreeRTOS-plus-TCP/10-Porting/02-Embedded_Compiler_Porting
 *
 *****************************************************************************/
 

source/portable/Compiler/IAR/pack_struct_end.h

@@ -28,7 +28,7 @@
 /*****************************************************************************
 *
 * See the following URL for an explanation of this file:
-* http://www.FreeRTOS.org/FreeRTOS-Plus/FreeRTOS_Plus_TCP/Embedded_Compiler_Porting.html
+* https://freertos.org/Documentation/03-Libraries/02-FreeRTOS-plus/02-FreeRTOS-plus-TCP/10-Porting/02-Embedded_Compiler_Porting
 *
 *****************************************************************************/
 

source/portable/Compiler/IAR/pack_struct_start.h

@@ -28,7 +28,7 @@
 /*****************************************************************************
 *
 * See the following URL for an explanation of this file:
-* http://www.FreeRTOS.org/FreeRTOS-Plus/FreeRTOS_Plus_TCP/Embedded_Compiler_Porting.html
+* https://freertos.org/Documentation/03-Libraries/02-FreeRTOS-plus/02-FreeRTOS-plus-TCP/10-Porting/02-Embedded_Compiler_Porting
 *
 *****************************************************************************/
 

source/portable/Compiler/Keil/pack_struct_end.h

@@ -28,7 +28,7 @@
 /*****************************************************************************
 *
 * See the following URL for an explanation of this file:
-* http://www.FreeRTOS.org/FreeRTOS-Plus/FreeRTOS_Plus_TCP/Embedded_Compiler_Porting.html
+* https://freertos.org/Documentation/03-Libraries/02-FreeRTOS-plus/02-FreeRTOS-plus-TCP/10-Porting/02-Embedded_Compiler_Porting
 *
 *****************************************************************************/
 ;

source/portable/Compiler/Keil/pack_struct_start.h

@@ -28,7 +28,7 @@
 /*****************************************************************************
 *
 * See the following URL for an explanation of this file:
-* http://www.FreeRTOS.org/FreeRTOS-Plus/FreeRTOS_Plus_TCP/Embedded_Compiler_Porting.html
+* https://freertos.org/Documentation/03-Libraries/02-FreeRTOS-plus/02-FreeRTOS-plus-TCP/10-Porting/02-Embedded_Compiler_Porting
 *
 *****************************************************************************/
 

source/portable/Compiler/MPLAB_XC/pack_struct_end.h

@@ -28,7 +28,7 @@
 /*****************************************************************************
 *
 * See the following URL for an explanation of this file:
-* http://www.FreeRTOS.org/FreeRTOS-Plus/FreeRTOS_Plus_TCP/Embedded_Compiler_Porting.html
+* https://freertos.org/Documentation/03-Libraries/02-FreeRTOS-plus/02-FreeRTOS-plus-TCP/10-Porting/02-Embedded_Compiler_Porting
 *
 *****************************************************************************/
 

source/portable/Compiler/MPLAB_XC/pack_struct_start.h

@@ -28,6 +28,6 @@
 /*****************************************************************************
 *
 * See the following URL for an explanation of this file:
-* http://www.FreeRTOS.org/FreeRTOS-Plus/FreeRTOS_Plus_TCP/Embedded_Compiler_Porting.html
+* https://freertos.org/Documentation/03-Libraries/02-FreeRTOS-plus/02-FreeRTOS-plus-TCP/10-Porting/02-Embedded_Compiler_Porting
 *
 *****************************************************************************/

source/portable/Compiler/MSVC/pack_struct_end.h

@@ -28,7 +28,7 @@
 /*****************************************************************************
 *
 * See the following URL for an explanation of this file:
-* http://www.FreeRTOS.org/FreeRTOS-Plus/FreeRTOS_Plus_TCP/Embedded_Compiler_Porting.html
+* https://freertos.org/Documentation/03-Libraries/02-FreeRTOS-plus/02-FreeRTOS-plus-TCP/10-Porting/02-Embedded_Compiler_Porting
 *
 *****************************************************************************/
 

source/portable/Compiler/MSVC/pack_struct_start.h

@@ -28,7 +28,7 @@
 /*****************************************************************************
 *
 * See the following URL for an explanation of this file:
-* http://www.FreeRTOS.org/FreeRTOS-Plus/FreeRTOS_Plus_TCP/Embedded_Compiler_Porting.html
+* https://freertos.org/Documentation/03-Libraries/02-FreeRTOS-plus/02-FreeRTOS-plus-TCP/10-Porting/02-Embedded_Compiler_Porting
 *
 *****************************************************************************/
 

source/portable/Compiler/Renesas/pack_struct_end.h

@@ -28,7 +28,7 @@
 /*****************************************************************************
 *
 * See the following URL for an explanation of this file:
-* http://www.FreeRTOS.org/FreeRTOS-Plus/FreeRTOS_Plus_TCP/Embedded_Compiler_Porting.html
+* https://freertos.org/Documentation/03-Libraries/02-FreeRTOS-plus/02-FreeRTOS-plus-TCP/10-Porting/02-Embedded_Compiler_Porting
 *
 *****************************************************************************/
 

source/portable/Compiler/Renesas/pack_struct_start.h

@@ -28,7 +28,7 @@
 /*****************************************************************************
 *
 * See the following URL for an explanation of this file:
-* http://www.FreeRTOS.org/FreeRTOS-Plus/FreeRTOS_Plus_TCP/Embedded_Compiler_Porting.html
+* https://freertos.org/Documentation/03-Libraries/02-FreeRTOS-plus/02-FreeRTOS-plus-TCP/10-Porting/02-Embedded_Compiler_Porting
 *
 *****************************************************************************/
 

source/portable/Compiler/Tasking/pack_struct_end.h

@@ -28,7 +28,7 @@
 /*****************************************************************************
 *
 * See the following URL for an explanation of this file:
-* http://www.FreeRTOS.org/FreeRTOS-Plus/FreeRTOS_Plus_TCP/Embedded_Compiler_Porting.html
+* https://freertos.org/Documentation/03-Libraries/02-FreeRTOS-plus/02-FreeRTOS-plus-TCP/10-Porting/02-Embedded_Compiler_Porting
 *
 *****************************************************************************/
 

source/portable/Compiler/Tasking/pack_struct_start.h

@@ -28,7 +28,7 @@
 /*****************************************************************************
 *
 * See the following URL for an explanation of this file:
-* http://www.FreeRTOS.org/FreeRTOS-Plus/FreeRTOS_Plus_TCP/Embedded_Compiler_Porting.html
+* https://freertos.org/Documentation/03-Libraries/02-FreeRTOS-plus/02-FreeRTOS-plus-TCP/10-Porting/02-Embedded_Compiler_Porting
 *
 *****************************************************************************/
 

source/portable/NetworkInterface/M487/NetworkInterface.c

@@ -73,7 +73,7 @@ static void prvEMACHandlerTask( void * pvParameters );
 static void prvPhyTmrCallback( TimerHandle_t xTimer );
 
 /* The size of each buffer when BufferAllocation_1 is used:
- * http://www.freertos.org/FreeRTOS-Plus/FreeRTOS_Plus_TCP/Embedded_Ethernet_Buffer_Management.html */
+ * https://freertos.org/Documentation/03-Libraries/02-FreeRTOS-plus/02-FreeRTOS-plus-TCP/05-Buffer-management */
 
 #define niBUFFER_1_PACKET_SIZE 1536
 #ifdef __ICCARM__

source/portable/NetworkInterface/STM32Hxx/NetworkInterface.c

@@ -1174,6 +1174,12 @@ static void prvEMACHandlerTask( void * pvParameters )
  */
  if( xSTM32H_GetPhyLinkStatus( pxMyInterface ) == pdFALSE )
  {
+ #if ( ipconfigSUPPORT_NETWORK_DOWN_EVENT != 0 )
+ {
+ FreeRTOS_NetworkDown( pxMyInterface );
+ }
+ #endif /* ( ipconfigSUPPORT_NETWORK_DOWN_EVENT != 0 ) */
+
  /* Stop the DMA transfer. */
  HAL_ETH_Stop_IT( &( xEthHandle ) );
  /* Clear the Transmit buffers. */

source/portable/NetworkInterface/Zynq/NetworkInterface.c

@@ -64,7 +64,7 @@
 #define niBMSR_LINK_STATUS 0x0004uL
 
 /* The size of each buffer when BufferAllocation_1 is used:
- * http://www.freertos.org/FreeRTOS-Plus/FreeRTOS_Plus_TCP/Embedded_Ethernet_Buffer_Management.html */
+ * https://freertos.org/Documentation/03-Libraries/02-FreeRTOS-plus/02-FreeRTOS-plus-TCP/05-Buffer-management */
 #define niBUFFER_1_PACKET_SIZE 1536
 
 /* Naming and numbering of PHY registers. */

source/portable/NetworkInterface/pic32mzef/BufferAllocation_2.c

@@ -29,7 +29,7 @@
 *
 * See the following web page for essential buffer allocation scheme usage and
 * configuration details:
-* http://www.FreeRTOS.org/FreeRTOS-Plus/FreeRTOS_Plus_TCP/Embedded_Ethernet_Buffer_Management.html
+* https://freertos.org/Documentation/03-Libraries/02-FreeRTOS-plus/02-FreeRTOS-plus-TCP/05-Buffer-management
 *
 ******************************************************************************/
 

source/portable/NetworkInterface/xilinx_ultrascale/NetworkInterface.c

@@ -68,7 +68,7 @@
 #endif
 
 /* The size of each buffer when BufferAllocation_1 is used:
- * http://www.freertos.org/FreeRTOS-Plus/FreeRTOS_Plus_TCP/Embedded_Ethernet_Buffer_Management.html */
+ * https://freertos.org/Documentation/03-Libraries/02-FreeRTOS-plus/02-FreeRTOS-plus-TCP/05-Buffer-management */
 #if ( USE_JUMBO_FRAMES == 1 )
  #define niBUFFER_1_PACKET_SIZE 10240
 #else

test/Coverity/ConfigFiles/FreeRTOSIPConfig.h

@@ -103,7 +103,7 @@
 /* If ipconfigUSE_NETWORK_EVENT_HOOK is set to 1 then FreeRTOS+TCP will call the
  * network event hook at the appropriate times. If ipconfigUSE_NETWORK_EVENT_HOOK
  * is not set to 1 then the network event hook will never be called. See:
- * http://www.FreeRTOS.org/FreeRTOS-Plus/FreeRTOS_Plus_UDP/API/vApplicationIPNetworkEventHook.shtml.
+ * https://freertos.org/Documentation/03-Libraries/02-FreeRTOS-plus/02-FreeRTOS-plus-TCP/09-API-reference/57-vApplicationIPNetworkEventHook.
  */
 #define ipconfigUSE_NETWORK_EVENT_HOOK 1
 

test/Coverity/ConfigFiles/pack_struct_end.h

@@ -28,7 +28,7 @@
 /*****************************************************************************
 *
 * See the following URL for an explanation of this file:
-* http://www.FreeRTOS.org/FreeRTOS-Plus/FreeRTOS_Plus_TCP/Embedded_Compiler_Porting.html
+* https://freertos.org/Documentation/03-Libraries/02-FreeRTOS-plus/02-FreeRTOS-plus-TCP/10-Porting/02-Embedded_Compiler_Porting
 *
 *****************************************************************************/
 

test/Coverity/ConfigFiles/pack_struct_start.h

@@ -28,7 +28,7 @@
 /*****************************************************************************
 *
 * See the following URL for an explanation of this file:
-* http://www.FreeRTOS.org/FreeRTOS-Plus/FreeRTOS_Plus_TCP/Embedded_Compiler_Porting.html
+* https://freertos.org/Documentation/03-Libraries/02-FreeRTOS-plus/02-FreeRTOS-plus-TCP/10-Porting/02-Embedded_Compiler_Porting
 *
 *****************************************************************************/
 

test/build-combination/AllDisable/FreeRTOSIPConfig.h

@@ -99,7 +99,7 @@
 /* If ipconfigUSE_NETWORK_EVENT_HOOK is set to 1 then FreeRTOS+TCP will call the
  * network event hook at the appropriate times. If ipconfigUSE_NETWORK_EVENT_HOOK
  * is not set to 1 then the network event hook will never be called. See:
- * http://www.FreeRTOS.org/FreeRTOS-Plus/FreeRTOS_Plus_UDP/API/vApplicationIPNetworkEventHook.shtml.
+ * https://freertos.org/Documentation/03-Libraries/02-FreeRTOS-plus/02-FreeRTOS-plus-TCP/09-API-reference/57-vApplicationIPNetworkEventHook.
  */
 #define ipconfigUSE_NETWORK_EVENT_HOOK 0
 

test/build-combination/AllEnable/FreeRTOSIPConfig.h

@@ -130,7 +130,7 @@
 /* If ipconfigUSE_NETWORK_EVENT_HOOK is set to 1 then FreeRTOS+TCP will call the
  * network event hook at the appropriate times. If ipconfigUSE_NETWORK_EVENT_HOOK
  * is not set to 1 then the network event hook will never be called. See:
- * http://www.FreeRTOS.org/FreeRTOS-Plus/FreeRTOS_Plus_UDP/API/vApplicationIPNetworkEventHook.shtml.
+ * https://freertos.org/Documentation/03-Libraries/02-FreeRTOS-plus/02-FreeRTOS-plus-TCP/09-API-reference/57-vApplicationIPNetworkEventHook.
  */
 #define ipconfigUSE_NETWORK_EVENT_HOOK 1
 

test/build-combination/Enable_IPv4/FreeRTOSIPConfig.h

@@ -133,7 +133,7 @@
 /* If ipconfigUSE_NETWORK_EVENT_HOOK is set to 1 then FreeRTOS+TCP will call the
  * network event hook at the appropriate times. If ipconfigUSE_NETWORK_EVENT_HOOK
  * is not set to 1 then the network event hook will never be called. See:
- * http://www.FreeRTOS.org/FreeRTOS-Plus/FreeRTOS_Plus_UDP/API/vApplicationIPNetworkEventHook.shtml.
+ * https://freertos.org/Documentation/03-Libraries/02-FreeRTOS-plus/02-FreeRTOS-plus-TCP/09-API-reference/57-vApplicationIPNetworkEventHook.
  */
 #define ipconfigUSE_NETWORK_EVENT_HOOK 1
 

test/build-combination/Enable_IPv4_IPv6/FreeRTOSIPConfig.h

@@ -133,7 +133,7 @@
 /* If ipconfigUSE_NETWORK_EVENT_HOOK is set to 1 then FreeRTOS+TCP will call the
  * network event hook at the appropriate times. If ipconfigUSE_NETWORK_EVENT_HOOK
  * is not set to 1 then the network event hook will never be called. See:
- * http://www.FreeRTOS.org/FreeRTOS-Plus/FreeRTOS_Plus_UDP/API/vApplicationIPNetworkEventHook.shtml.
+ * https://freertos.org/Documentation/03-Libraries/02-FreeRTOS-plus/02-FreeRTOS-plus-TCP/09-API-reference/57-vApplicationIPNetworkEventHook.
  */
 #define ipconfigUSE_NETWORK_EVENT_HOOK 1