Fix MISRA2012 issues with Coverity version 2024.06 (FreeRTOS#1196)

* MISRA fix

* More MISRA fixes

* Add exception for Rule 17.11

* Fix comments

* Include externs inside preprocessor macros

* Taking global exception for Rule 17.11

* Fix formatting

source/FreeRTOS_ARP.c

@@ -979,7 +979,7 @@ static BaseType_t prvFindCacheEntry( const MACAddress_t * pxMACAddress,
             if( pxEndPoint != NULL )
             {
                 /* For multi-cast, use the first IPv4 end-point. */
-                memcpy( pxMACAddress->ucBytes, pxEndPoint->xMACAddress.ucBytes, sizeof( pxMACAddress->ucBytes ) );
+                ( void ) memcpy( pxMACAddress->ucBytes, pxEndPoint->xMACAddress.ucBytes, sizeof( pxMACAddress->ucBytes ) );
                 *( ppxEndPoint ) = pxEndPoint;
                 eReturn = eARPCacheHit;
             }

source/FreeRTOS_DNS.c

@@ -63,41 +63,45 @@ const MACAddress_t xLLMNR_MacAddress = { { 0x01, 0x00, 0x5e, 0x00, 0x00, 0xfc }
 /** @brief The IPv6 link-scope multicast MAC address */
 const MACAddress_t xLLMNR_MacAddressIPv6 = { { 0x33, 0x33, 0x00, 0x01, 0x00, 0x03 } };
 
+#if ( ( ipconfigUSE_LLMNR != 0 ) && ( ipconfigUSE_IPv6 != 0 ) )
 /** @brief The IPv6 link-scope multicast address */
-const IPv6_Address_t ipLLMNR_IP_ADDR_IPv6 =
-{
-    { /* ff02::1:3 */
-        0xff, 0x02,
-        0x00, 0x00,
-        0x00, 0x00,
-        0x00, 0x00,
-        0x00, 0x00,
-        0x00, 0x00,
-        0x00, 0x01,
-        0x00, 0x03,
-    }
-};
+    const IPv6_Address_t ipLLMNR_IP_ADDR_IPv6 =
+    {
+        { /* ff02::1:3 */
+            0xff, 0x02,
+            0x00, 0x00,
+            0x00, 0x00,
+            0x00, 0x00,
+            0x00, 0x00,
+            0x00, 0x00,
+            0x00, 0x01,
+            0x00, 0x03,
+        }
+    };
+#endif /* ( ( ipconfigUSE_LLMNR != 0 ) && ( ipconfigUSE_IPv6 != 0 ) ) */
 
 /** @brief The MAC address used for MDNS. */
 const MACAddress_t xMDNS_MacAddress = { { 0x01, 0x00, 0x5e, 0x00, 0x00, 0xfb } };
 
 /** @brief The IPv6 multicast DNS MAC address. */
 const MACAddress_t xMDNS_MacAddressIPv6 = { { 0x33, 0x33, 0x00, 0x00, 0x00, 0xFB } };
 
+#if ( ( ipconfigUSE_MDNS != 0 ) && ( ipconfigUSE_IPv6 != 0 ) )
 /** @brief multicast DNS IPv6 address */
-const IPv6_Address_t ipMDNS_IP_ADDR_IPv6 =
-{
-    { /* ff02::fb */
-        0xff, 0x02,
-        0x00, 0x00,
-        0x00, 0x00,
-        0x00, 0x00,
-        0x00, 0x00,
-        0x00, 0x00,
-        0x00, 0x00,
-        0x00, 0xfb,
-    }
-};
+    const IPv6_Address_t ipMDNS_IP_ADDR_IPv6 =
+    {
+        { /* ff02::fb */
+            0xff, 0x02,
+            0x00, 0x00,
+            0x00, 0x00,
+            0x00, 0x00,
+            0x00, 0x00,
+            0x00, 0x00,
+            0x00, 0x00,
+            0x00, 0xfb,
+        }
+    };
+#endif /* ( ( ipconfigUSE_MDNS != 0 ) && ( ipconfigUSE_IPv6 != 0 ) ) */
 
 /* Exclude the entire file if DNS is not enabled. */
 #if ( ipconfigUSE_DNS != 0 )

source/FreeRTOS_IP.c

@@ -982,7 +982,7 @@ BaseType_t FreeRTOS_IPInit_Multi( void )
             {
                 static StaticTask_t xIPTaskBuffer;
                 static StackType_t xIPTaskStack[ ipconfigIP_TASK_STACK_SIZE_WORDS ];
-                xIPTaskHandle = xTaskCreateStatic( prvIPTask,
+                xIPTaskHandle = xTaskCreateStatic( &prvIPTask,
                                                    "IP-Task",
                                                    ipconfigIP_TASK_STACK_SIZE_WORDS,
                                                    NULL,
@@ -997,7 +997,7 @@ BaseType_t FreeRTOS_IPInit_Multi( void )
             }
             #else /* if ( configSUPPORT_STATIC_ALLOCATION == 1 ) */
             {
-                xReturn = xTaskCreate( prvIPTask,
+                xReturn = xTaskCreate( &prvIPTask,
                                        "IP-task",
                                        ipconfigIP_TASK_STACK_SIZE_WORDS,
                                        NULL,

source/include/FreeRTOS_DNS.h

@@ -47,8 +47,10 @@ extern const MACAddress_t xLLMNR_MacAddress;
 /* The LLMNR IPv6 MAC address is 33:33:00:01:00:03 */
 extern const MACAddress_t xLLMNR_MacAddressIPv6;
 
+#if ( ( ipconfigUSE_LLMNR != 0 ) && ( ipconfigUSE_IPv6 != 0 ) )
 /* The LLMNR IPv6 address is ff02::1:3 */
-extern const IPv6_Address_t ipLLMNR_IP_ADDR_IPv6;
+    extern const IPv6_Address_t ipLLMNR_IP_ADDR_IPv6;
+#endif /* ( ( ipconfigUSE_LLMNR != 0 ) && ( ipconfigUSE_IPv6 != 0 ) ) */
 
 /* The MDNS MAC address is 01:00:5e:00:00:fc */
 extern const MACAddress_t xMDNS_MacAddress;
@@ -61,8 +63,10 @@ extern const MACAddress_t xMDNS_MacAddressIPv6;
 /* Guarantee backward compatibility. */
 #define xMDNS_MACAddressIPv6    xMDNS_MacAddressIPv6
 
+#if ( ( ipconfigUSE_MDNS != 0 ) && ( ipconfigUSE_IPv6 != 0 ) )
 /* The MDNS IPv6 address is ff02::1:3 */
-extern const IPv6_Address_t ipMDNS_IP_ADDR_IPv6;
+    extern const IPv6_Address_t ipMDNS_IP_ADDR_IPv6;
+#endif /* ( ( ipconfigUSE_MDNS != 0 ) && ( ipconfigUSE_IPv6 != 0 ) ) */
 
 /** @brief While doing integration tests, it is necessary to influence the choice
  * between DNS/IPv4 and DNS/IPv4.  Depending on this, a DNS server will be

test/Coverity/coverity_misra.config

@@ -42,6 +42,10 @@
             deviation: "Rule 2.4",
             reason: "Similar to the FreeRTOS Kernel, structures are always declared with both a struct tag and typedef alias. Some of these structs are always referred to by their typedef alias and thus the corresponding tags are unused."
         },
+        {
+            deviation: "Rule 17.11",
+            reason: "_Noreturn is added by C standard as part of C11 and the FreeRTOS+TCP codebase is compatible with C90. This is a false positive as the Coverity is also run with C90 as the standard. "
+        },
         {
             deviation: "Directive 4.8",
             reason: "We include lots of header files from other sources such as the kernel which defines structures that violate that Dir"