mbuf.h

 1/* SPDX-License-Identifier: GPL-2.0-or-later */
 2/******************************************************************************
 3 *
 4 *	(C)Copyright 1998,1999 SysKonnect,
 5 *	a business unit of Schneider & Koch & Co. Datensysteme GmbH.
 6 *
 7 *	The information in this file is provided "AS IS" without warranty.
 8 *
 9 ******************************************************************************/
10
11#ifndef	_MBUF_
12#define _MBUF_
13
14#define M_SIZE	4504
15
16#ifndef MAX_MBUF
17#define MAX_MBUF	4
18#endif
19
20#ifndef NO_STD_MBUF
21#define sm_next         m_next
22#define sm_off          m_off
23#define sm_len          m_len
24#define sm_data         m_data
25#define SMbuf           Mbuf
26#define mtod		smtod
27#define mtodoff		smtodoff
28#endif
29
30struct s_mbuf {
31	struct s_mbuf	*sm_next ;		/* low level linked list */
32	short		sm_off ;			/* offset in m_data */
33	u_int		sm_len ;			/* len of data */
34#ifdef	PCI
35	int		sm_use_count ;
36#endif
37	char		sm_data[M_SIZE] ;
38} ;
39
40typedef struct s_mbuf SMbuf ;
41
42/* mbuf head, to typed data */
43#define	smtod(x,t)	((t)((x)->sm_data + (x)->sm_off))
44#define	smtodoff(x,t,o)	((t)((x)->sm_data + (o)))
45
46#endif	/* _MBUF_ */