Adding IPv4/v6 build level separation: integration branch (#855)

* use matching endpoint instead of first endpoint

* update with @htibosch  latest changes

* fix formatting

* fix misra and spellings

* code clean up

* wip separation IP

* separation IP

* separation IP

* wip buils separation

* fixing unit tests

* fix unit tests

* fix formatting

* wip , next prvProcessNetworkDownEvent

* adding build separation to ip utils

* fix unit tests

* fix formatting

* update xCheckRequiresARPResolution

* update vARPAgeCache

* update vARPAgeCache

* misra checks

* fix formatting

* fix misra

* wip s/w: FreeRTOS_recvfrom

* wip sockets till prvSocketBindAdd

* adding  build separation to FreeRTOS_Sockets.c

* add build config support to FreeRTOS_inet_pton FreeRTOS_inet_ntop FreeRTOS_GetIPType

* adding build config support

* fix build  issues

* check misra

* minor fix

* fix unit tests

* fix unit tests build

* Uncrustify: triggered by comment

* fix formatting

* build separate FreeRTOS_TCP_IP.c

* build separate FreeRTOS_TCP_Reception.c

* misra fix

* build separate FreeRTOS_TCP_State_Handling.c

* build separate FreeRTOS_TCP_Transmission.c

* build separate FreeRTOS_TCP_Transmission.c fix build

* adding build separation for FreeRTOS_TCP_Utils.c and FreeRTOS_TCP_Transmission.c

* fix formatting

* UDP: Build Separation Changes

Changes in UDP files to support IPv4 and IPv6 Build Separation.

* fix IPv4 build issues post build sep merge

* IPv4 only build

* more - fix IPv4 build issues post build sep merge

* fix DHCP v4

* fix v6 build

* add v6 build checks

* separate v4v6 tcp files

* fix rebase conflicts

* fix formatting

* fix build when TCP disabled

* add more build checks

* adding more ipv4 flags to v4 specific files

* fix udp unit tests

* add build config build tests to CI

* fix formatting

* fix build checks yml

* DNS: Build Separation Changes

Changes for supporting IPv4 and IPv6 build separation in DNS.

* Routing: Build Separtion Changes

Changes for supporting IPv4 and IPv6 build separation in Routing.

* DNS build fix and rebase to latest changes

* fix formatting

* fix unit tests

* fix formatting

* fix MISRA

* updaating ARP functions to be available on all configs

* plus_tcp_demo_cli build config changes

* fix formatting, guard FreeRTOS_FillEndPoint inside ipconfigUSE_IPv4 check

* more build sepration changes to routing

* build separation plus_tcp_demo_cli.c

* fixing issues with routing, fix formatting

* adding pxFindEndpoint of plus_tcp_demo_cli inside ipconfigUSE_IPv6 != 0 check

* minor build fix

* moving usDNSType of endpoint struct out of ipconfigUSE_IPv6 check

* update code to use IP family while using socket APIs

* moving vSetMultiCastIPv4MacAddress to FreeRTOS_IPv4_Utils.c

* fix routing

* build DNS only if IPv4 is enabled

* fix review feedback

* fix build

* fix build

* fix formatting

* fix comment

* fix wrt reeview feedback

* fix unit tests

* cleanup FreeRTOS_MatchingEndpoint

* fix FreeRTOS_MatchingEndpoint to handle cusstom frames

---------

Co-authored-by: GitHub Action <action@github.com>
Co-authored-by: shubnil <103672514+shubnil@users.noreply.github.com>

source/include/FreeRTOSIPConfigDefaults.h

@@ -241,9 +241,8 @@
     #define ipconfigUSE_IPv6    ( 1 )
 #endif
 
-#if ( ipconfigUSE_IPv4 != 1 ) || ( ipconfigUSE_IPv6 != 1 )
-    #error "Build separation for both IPv4 and IPv6 is work in progress. \
-    Please enable both ipconfigUSE_IPv4 and ipconfigUSE_IPv6 flags."
+#if ( ipconfigUSE_IPv4 != 1 ) && ( ipconfigUSE_IPv6 != 1 )
+    #error "Invalid build configuration"
 #endif
 
 /*
@@ -745,6 +744,10 @@
     #define ipconfigUSE_DNS    1
 #endif
 
+#if ( ipconfigUSE_IPv4 == 0 ) && ( ipconfigUSE_DNS != 0 )
+    #error "IPv4 (ipconfigUSE_IPv4) needs to be enabled to use DNS"
+#endif
+
 /* When looking up a host with DNS, this macro determines how long the
  * call to FreeRTOS_recvfrom() will wait for a reply.
  * When there is no reply, the request will be repeated up to