/*      $OpenBSD: common.h,v 1.10 2022/12/28 21:30:17 jmc Exp $ */
/*      $NetBSD: common.h,v 1.9 2011/08/30 19:49:10 joerg Exp $ */

/*
 * Copyright (c) 1993-95 Mats O Jansson.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */

#ifndef _COMMON_H_
#define _COMMON_H_

#define MAXDL           16              /* maximum number concurrent load */
#define IFNAME_SIZE     32              /* maximum size if interface name */
#define BUFSIZE         1600            /* main receive buffer size     */
#define HDRSIZ          22              /* room for 803.2 header        */

#ifndef MOP_FILE_PATH
#define MOP_FILE_PATH   "/tftpboot/mop"
#endif

#define DEBUG_ONELINE   1
#define DEBUG_HEADER    2
#define DEBUG_INFO      3

/*
 * structure per interface
 *
 */

struct if_info {
        int     fd;                     /* File Descriptor                 */
        int     trans;                  /* Transport type Ethernet/802.3   */
        u_char  eaddr[6];               /* Ethernet addr of this interface */
        char    if_name[IFNAME_SIZE];   /* Interface Name                  */
        int     (*iopen)(char *, int, u_short, int);
                                        /* Interface Open Routine          */
        int     (*write)(int, u_char *, int, int);
                                        /* Interface Write Routine         */
        void    (*read)(void);          /* Interface Read Routine          */
        struct if_info *next;           /* Next Interface                  */
};

#define DL_STATUS_FREE           0
#define DL_STATUS_READ_IMGHDR    1
#define DL_STATUS_SENT_MLD       2
#define DL_STATUS_SENT_PLT       3

typedef enum {
        IMAGE_TYPE_MOP,                 /* MOP image */
        IMAGE_TYPE_AOUT,                /* a.out image */
        IMAGE_TYPE_ELF32,               /* Elf32 image */
        IMAGE_TYPE_ELF64                /* Elf64 image */
} mopd_imagetype;

struct dllist {
        u_char          status;         /* Status byte                  */
        struct if_info *ii;             /* interface pointer            */
        u_char          eaddr[6];       /* targets ethernet address     */
        int             ldfd;           /* filedescriptor for loadfile  */
        u_short         dl_bsz;         /* Data Link Buffer Size        */
        int             timeout;        /* Timeout counter              */
        u_char          count;          /* Packet Counter               */
        u_int32_t       loadaddr;       /* Load Address                 */
        u_int32_t       xferaddr;       /* Transfer Address             */
        u_int32_t       nloadaddr;      /* Next Load Address            */
        off_t           lseek;          /* Seek before last read        */
        mopd_imagetype  image_type;     /* what type of image is it?    */

        /* For ELF files */
        int             e_machine;      /* Machine ID                   */
        int             e_nsec;         /* number of program sections   */
#define SEC_MAX 4
        struct {
                off_t s_foff;           /* file offset of section       */
                u_int32_t s_vaddr;      /* virtual address of section   */
                u_int32_t s_fsize;      /* file size of section         */
                u_int32_t s_msize;      /* memory size of section       */
                u_int32_t s_pad;        /* padding until next section   */
                u_int32_t s_loff;       /* logical offset into image    */
        } e_sections[SEC_MAX];          /* program sections             */
        u_int32_t       e_curpos;       /* current logical position     */
        int             e_cursec;       /* current section */

        /* For a.out files */
        int             a_mid;          /* Machine ID                   */
        u_int32_t       a_text;         /* Size of text segment         */
        u_int32_t       a_text_fill;    /* Size of text segment fill    */
        u_int32_t       a_data;         /* Size of data segment         */
        u_int32_t       a_data_fill;    /* Size of data segment fill    */
        u_int32_t       a_bss;          /* Size of bss segment          */
        u_int32_t       a_bss_fill;     /* Size of bss segment fill     */
        off_t           a_lseek;        /* Keep track of pos in newfile */
};

#endif /* _COMMON_H_ */