-extern int connect_to(const char *host, int portnum, struct client_state *csp);
-extern int write_socket(int fd, const char *buf, int n);
-extern int read_socket(int fd, char *buf, int n);
-extern void close_socket(int fd);
+extern jb_socket connect_to(const char *host, int portnum, struct client_state *csp);
+extern int write_socket(jb_socket fd, const char *buf, int n);
+extern int read_socket(jb_socket fd, char *buf, int n);
+extern void close_socket(jb_socket fd);