added C++ header guards

git-svn-id: file:///srv/svn/repos/haiku/trunk/current@1655 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/posix/net/if.h

@@ -6,16 +6,16 @@
 #define _NET_IF_H
 
 #include <OS.h>
-//#include <Drivers.h>
+#include <Drivers.h>
 #include <sys/socketvar.h>
 #include <net/if_types.h>
 #include <netinet/in.h>
 #include <net/route.h>
 
-/* XXX - hack to get this file building 
- *       taken from be/drivers/Drivers.h
- */
-#define B_DEVICE_OP_CODES_END 9999
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 enum {
 	IF_GETADDR = B_DEVICE_OP_CODES_END,
 	IF_INIT,
@@ -273,5 +273,9 @@ struct ifa_msghdr {
   void    if_init(void);
 #endif
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* _NET_IF_H */
 

headers/posix/net/if_dl.h

@@ -5,7 +5,11 @@
 #ifndef OBOS_IF_DL_H
 #define OBOS_IF_DL_H
 
-#include "net/if.h"
+#include <net/if.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
 
 /* link level sockaddr structure */
 struct sockaddr_dl {
@@ -26,5 +30,9 @@ struct sockaddr_dl {
 void    link_addr (const char *, struct sockaddr_dl *);
 char    *link_ntoa (const struct sockaddr_dl *);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* OBOS_IF_DL_H */