ssize_t compat_send (int sockfd, const void *buf, size_t len, int flags);
ssize_t compat_recv (int sockfd, void *buf, size_t len, int flags);
ssize_t compat_send (int sockfd, const void *buf, size_t len, int flags);
ssize_t compat_recv (int sockfd, void *buf, size_t len, int flags);