__owur int dtls1_read_bytes(SSL *s, int type, int *recvd_type,
unsigned char *buf, int len, int peek);
__owur int dtls1_write_bytes(SSL *s, int type, const void *buf, int len);
__owur int dtls1_read_bytes(SSL *s, int type, int *recvd_type,
unsigned char *buf, int len, int peek);
__owur int dtls1_write_bytes(SSL *s, int type, const void *buf, int len);