1 /******************************************************************************
2 *
3 * (C)Copyright 1998,1999 SysKonnect,
4 * a business unit of Schneider & Koch & Co. Datensysteme GmbH.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * The information in this file is provided "AS IS" without warranty.
12 *
13 ******************************************************************************/
14
15 #ifndef _MBUF_
16 #define _MBUF_
17
18 #ifndef PCI
19 #define M_SIZE 4550
20 #else
21 #define M_SIZE 4504
22 #endif
23
24 #ifndef MAX_MBUF
25 #define MAX_MBUF 4
26 #endif
27
28 #ifndef NO_STD_MBUF
29 #define sm_next m_next
30 #define sm_off m_off
31 #define sm_len m_len
32 #define sm_data m_data
33 #define SMbuf Mbuf
34 #define mtod smtod
35 #define mtodoff smtodoff
36 #endif
37
38 struct s_mbuf {
39 struct s_mbuf *sm_next ; /* low level linked list */
40 short sm_off ; /* offset in m_data */
41 u_int sm_len ; /* len of data */
42 #ifdef PCI
43 int sm_use_count ;
44 #endif
45 char sm_data[M_SIZE] ;
46 } ;
47
48 typedef struct s_mbuf SMbuf ;
49
50 /* mbuf head, to typed data */
51 #define smtod(x,t) ((t)((x)->sm_data + (x)->sm_off))
52 #define smtodoff(x,t,o) ((t)((x)->sm_data + (o)))
53
54 #endif /* _MBUF_ */
55
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