tnbuf.h

用于嵌入式系统的TCP/IP协议栈及若干服务

/*
*            Copyright (c) 1998-2001 by NETsilicon Inc.
*
*  This software is copyrighted by and is the sole property of
*  NETsilicon.  All rights, title, ownership, or other interests
*  in the software remain the property of NETsilicon.  This
*  software may only be used in accordance with the corresponding
*  license agreement.  Any unauthorized use, duplication, transmission,
*  distribution, or disclosure of this software is expressly forbidden.
*
*  This Copyright notice may not be removed or modified without prior
*  written consent of NETsilicon.
*
*  NETsilicon, reserves the right to modify this software
*  without notice.
*
*  NETsilicon
*  411 Waverley Oaks Road                  USA 781.647.1234
*  Suite 227                               http://www.netsilicon.com
*  Waltham, MA 02452                       [e-mail]
*
*************************************************************************
*  $Name: Fusion 6.52 Fusion 6.51 $
*  $Date: 2001/09/20 10:38:58 $
*  $Source: M:/psisrc/ftp/incl/rcs/tnbuf.h $
*  $Revision: 1.4 $
**************************************************************************
*  File Description:
*
*
**************************************************************************/

#ifndef _TNBUF_
#define _TNBUF_

#define FTP_BUFSIZ  512

#define TNB_CLOSED      2
#define TNB_NSEL_ON     8

typedef struct tnbuf
   {
	int   tn_fd;              /* socket descriptor      */
	u16   tn_flags;           /* see below              */
	u8    * tn_nxt;           /* next character pointer */
	u8    * tn_lst;           /* last character pointer */
	u8    tn_buf[FTP_BUFSIZ]; /* da goods               */
   } tnbuf;

#define TIO_INCOMING    0x8

typedef struct tnio
   {
    struct tnbuf * nibuf;      /* network input */
    struct tnbuf * nobuf;      /* network output */
    int          (*send_func)(struct tnio * tniop);
    int          (*recv_func)(struct tnio * tniop);
    int          errors;       /* number of error encountered */
    u16          flags;        /* see below */
   } tnio;


#define tnbcount(tb)    ((tb)->tn_lst - (tb)->tn_nxt)

#endif  /* _TNBUF_ */