| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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_ */ |