int Hsocket( int domain , int type , int protocol );
int Hfcntl( int fd , int cmd , ... );
int Hconnect( int fd , const struct sockaddr *addr , int addrlen );
+int Hbind( int fd , const struct sockaddr *addr , int addrlen );
+int Hlisten( int fd , int backlog );
int Hclose( int fd );
int Hsendto( int fd , const void *msg , int msglen , unsigned int flags , const struct sockaddr *addr , int addrlen );
int Hrecvfrom( int fd , void *buf , int buflen , unsigned int flags , struct sockaddr *addr , int *addrlen );