1. Add DPC protocol and DpcLib library in MdeModulePkg.

2. Add DpcDxe module and DxeDpcLib module in MdeModulePkg
3. Port network stack module to use DPC.
4. Use MIN, and MAX defined in MdePkg to replace NET_MIN and NET_MAX.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@4307 6f19259b-4bc3-4df7-8a09-765794883524

MdeModulePkg/Universal/Network/Dhcp4Dxe/Dhcp4Impl.c

@@ -178,7 +178,7 @@ DhcpCopyConfigure (
     }
 
     for (Index = 0; Index < Src->DiscoverTryCount; Index++) {
-      Dst->DiscoverTimeout[Index] = NET_MAX (Src->DiscoverTimeout[Index], 1);
+      Dst->DiscoverTimeout[Index] = MAX (Src->DiscoverTimeout[Index], 1);
     }
   }
 
@@ -194,7 +194,7 @@ DhcpCopyConfigure (
     }
 
     for (Index = 0; Index < Src->RequestTryCount; Index++) {
-      Dst->RequestTimeout[Index] = NET_MAX (Src->RequestTimeout[Index], 1);
+      Dst->RequestTimeout[Index] = MAX (Src->RequestTimeout[Index], 1);
     }
   }
 
@@ -214,7 +214,7 @@ DhcpCopyConfigure (
     SrcOptions  = Src->OptionList;
 
     for (Index = 0; Index < Src->OptionCount; Index++) {
-      Len = sizeof (EFI_DHCP4_PACKET_OPTION) + NET_MAX (SrcOptions[Index]->Length - 1, 0);
+      Len = sizeof (EFI_DHCP4_PACKET_OPTION) + MAX (SrcOptions[Index]->Length - 1, 0);
 
       DstOptions[Index] = NetAllocatePool (Len);
 
@@ -819,7 +819,7 @@ Dhcp4ParseCheckOption (
   Parse = (DHCP_PARSE_CONTEXT *) Context;
   Parse->Index++;
 
-  if (Parse->Index < Parse->OptionCount) {
+  if (Parse->Index <= Parse->OptionCount) {
     //
     // Use _CR to get the memory position of EFI_DHCP4_PACKET_OPTION for
     // the EFI_DHCP4_PACKET_OPTION->Data because DhcpIterateOptions only