/* SPDX-License-Identifier: GPL-2.0-or-later */
/******************************************************************************
 *
 *      (C)Copyright 1998,1999 SysKonnect,
 *      a business unit of Schneider & Koch & Co. Datensysteme GmbH.
 *
 *      The information in this file is provided "AS IS" without warranty.
 *
 ******************************************************************************/

#ifndef _MBUF_
#define _MBUF_

#define M_SIZE  4504

#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_ */