Corrected by previous assumption, since gethostbyname() has nothing to do with

struct sockaddr_in - the real culprits were BNetAddress::GetAddr(sockaddr_in&)
and BNetAddress::SetTo(const sockaddr_in&):
* moved check_r5_compatibility() into r5_compatibility.h to make that function
  available to BNetAddress, too
* adjusted sockaddr_in-handling methods of BNetAddress to deal with R5-addresses
  if in compatibility mode
* removed is_r5_sockaddr() again, since it is no longer needed

With this less hacky solution, Beam, NetPositive, NetworkTime and Vision still work. So, there's hope that the R5 compatibility layer is now complete.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@26377 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/net/r5_compatibility.h

@@ -44,4 +44,31 @@ extern addr_t __gNetworkEnd;
 extern addr_t __gNetAPIStart;
 extern addr_t __gNetAPIEnd;
 
+
+static inline bool
+check_r5_compatibility()
+{
+	if (!__gR5Compatibility)
+		return false;
+
+#ifndef __INTEL__
+	return false;
+#else
+
+	struct stack_frame {
+		struct stack_frame*	previous;
+		addr_t					return_address;
+	};
+
+	stack_frame* frame = (stack_frame*)get_stack_frame();
+	if (frame->return_address >= __gNetworkStart
+		&& frame->return_address < __gNetworkEnd) {
+		return false;
+	}
+
+	return true;
+#endif
+}
+
+
 #endif	// NET_R5_COMPATIBILITY_H