-extern int recvfromto __P((int, void *, size_t, int,
- struct sockaddr *, socklen_t *, struct sockaddr *, unsigned int *));
-extern int sendfromto __P((int, const void *, size_t,
- struct sockaddr *, struct sockaddr *, int));
+extern int recvfromto (int, void *, size_t, int,
+ struct sockaddr_storage *, socklen_t *, struct sockaddr_storage *, unsigned int *);
+extern int sendfromto (int, const void *, size_t,
+ struct sockaddr_storage *, struct sockaddr_storage *, int);