mbuf.h
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上传日期:2013-04-10
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文件大小:1k
- /******************************************************************************
- *
- * (C)Copyright 1998,1999 SysKonnect,
- * a business unit of Schneider & Koch & Co. Datensysteme GmbH.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * The information in this file is provided "AS IS" without warranty.
- *
- ******************************************************************************/
- #ifndef _MBUF_
- #define _MBUF_
- #ifndef PCI
- #define M_SIZE 4550
- #else
- #define M_SIZE 4504
- #endif
- #ifndef MAX_MBUF
- #define MAX_MBUF 4
- #endif
- #ifndef NO_STD_MBUF
- #define sm_next m_next
- #define sm_off m_off
- #define sm_len m_len
- #define sm_data m_data
- #define SMbuf Mbuf
- #define mtod smtod
- #define mtodoff smtodoff
- #endif
- struct s_mbuf {
- struct s_mbuf *sm_next ; /* low level linked list */
- short sm_off ; /* offset in m_data */
- u_int sm_len ; /* len of data */
- #ifdef PCI
- int sm_use_count ;
- #endif
- char sm_data[M_SIZE] ;
- } ;
- typedef struct s_mbuf SMbuf ;
- /* mbuf head, to typed data */
- #define smtod(x,t) ((t)((x)->sm_data + (x)->sm_off))
- #define smtodoff(x,t,o) ((t)((x)->sm_data + (o)))
- #endif /* _MBUF_ */