/*      $NetBSD: bootp.h,v 1.4 1997/09/06 13:55:57 drochner Exp $       */

/*
 * Bootstrap Protocol (BOOTP).  RFC951 and RFC1048.
 *
 * This file specifies the "implementation-independent" BOOTP protocol
 * information which is common to both client and server.
 *
 * Copyright 1988 by Carnegie Mellon.
 *
 * Permission to use, copy, modify, and distribute this program for any
 * purpose and without fee is hereby granted, provided that this copyright
 * and permission notice appear on all copies and supporting documentation,
 * the name of Carnegie Mellon not be used in advertising or publicity
 * pertaining to distribution of the program without specific prior
 * permission, and notice be given in supporting documentation that copying
 * and distribution is by permission of Carnegie Mellon and Stanford
 * University.  Carnegie Mellon makes no representations about the
 * suitability of this software for any purpose.  It is provided "as is"
 * without express or implied warranty.
 */

#ifndef _BOOTP_H_
#define _BOOTP_H_

struct bootp {
        unsigned char   bp_op;          /* packet opcode type */
        unsigned char   bp_htype;       /* hardware addr type */
        unsigned char   bp_hlen;        /* hardware addr length */
        unsigned char   bp_hops;        /* gateway hops */
        unsigned int    bp_xid;         /* transaction ID */
        unsigned short  bp_secs;        /* seconds since boot began */
        unsigned short  bp_flags;
        struct in_addr  bp_ciaddr;      /* client IP address */
        struct in_addr  bp_yiaddr;      /* 'your' IP address */
        struct in_addr  bp_siaddr;      /* server IP address */
        struct in_addr  bp_giaddr;      /* gateway IP address */
        unsigned char   bp_chaddr[16];  /* client hardware address */
        unsigned char   bp_sname[64];   /* server host name */
        char            bp_file[128];   /* boot file name */
#ifdef SUPPORT_DHCP
#define BOOTP_VENDSIZE 312
#else
#define BOOTP_VENDSIZE 64
#endif
        unsigned char   bp_vend[BOOTP_VENDSIZE];        /* vendor-specific area */
};

/*
 * UDP port numbers, server and client.
 */
#define IPPORT_BOOTPS           67
#define IPPORT_BOOTPC           68

#define BOOTREPLY               2
#define BOOTREQUEST             1


/*
 * Vendor magic cookie (v_magic) for CMU
 */
#define VM_CMU          "CMU"

/*
 * Vendor magic cookie (v_magic) for RFC1048
 */
#define VM_RFC1048      { 99, 130, 83, 99 }



/*
 * RFC1048 tag values used to specify what information is being supplied in
 * the vendor field of the packet.
 */

#define TAG_PAD                 ((unsigned char)   0)
#define TAG_SUBNET_MASK         ((unsigned char)   1)
#define TAG_TIME_OFFSET         ((unsigned char)   2)
#define TAG_GATEWAY             ((unsigned char)   3)
#define TAG_TIME_SERVER         ((unsigned char)   4)
#define TAG_NAME_SERVER         ((unsigned char)   5)
#define TAG_DOMAIN_SERVER       ((unsigned char)   6)
#define TAG_LOG_SERVER          ((unsigned char)   7)
#define TAG_COOKIE_SERVER       ((unsigned char)   8)
#define TAG_LPR_SERVER          ((unsigned char)   9)
#define TAG_IMPRESS_SERVER      ((unsigned char)  10)
#define TAG_RLP_SERVER          ((unsigned char)  11)
#define TAG_HOSTNAME            ((unsigned char)  12)
#define TAG_BOOTSIZE            ((unsigned char)  13)
#define TAG_DUMPFILE            ((unsigned char)  14)
#define TAG_DOMAINNAME          ((unsigned char)  15)
#define TAG_SWAPSERVER          ((unsigned char)  16)
#define TAG_ROOTPATH            ((unsigned char)  17)
#define TAG_INTF_MTU            ((unsigned char)  26)

#ifdef SUPPORT_DHCP
#define TAG_REQ_ADDR            ((unsigned char)  50)
#define TAG_LEASETIME           ((unsigned char)  51)
#define TAG_OVERLOAD            ((unsigned char)  52)
#define TAG_DHCP_MSGTYPE        ((unsigned char)  53)
#define TAG_SERVERID            ((unsigned char)  54)
#define TAG_PARAM_REQ           ((unsigned char)  55)
#define TAG_MSG                 ((unsigned char)  56)
#define TAG_MAXSIZE             ((unsigned char)  57)
#define TAG_T1                  ((unsigned char)  58)
#define TAG_T2                  ((unsigned char)  59)
#define TAG_CLASSID             ((unsigned char)  60)
#define TAG_CLIENTID            ((unsigned char)  61)
#define TAG_USER_CLASS          ((unsigned char)  77)
#endif

#define TAG_END                 ((unsigned char) 255)

#ifdef SUPPORT_DHCP
#define DHCPDISCOVER 1
#define DHCPOFFER 2
#define DHCPREQUEST 3
#define DHCPDECLINE 4
#define DHCPACK 5
#define DHCPNAK 6
#define DHCPRELEASE 7
#endif

/*
 * "vendor" data permitted for CMU bootp clients.
 */

struct cmu_vend {
        unsigned char   v_magic[4];     /* magic number */
        unsigned int    v_flags;        /* flags/opcodes, etc. */
        struct in_addr  v_smask;        /* Subnet mask */
        struct in_addr  v_dgate;        /* Default gateway */
        struct in_addr  v_dns1, v_dns2; /* Domain name servers */
        struct in_addr  v_ins1, v_ins2; /* IEN-116 name servers */
        struct in_addr  v_ts1, v_ts2;   /* Time servers */
        unsigned char   v_unused[25];   /* currently unused */
};


/* v_flags values */
#define VF_SMASK        1       /* Subnet mask field contains valid data */

/* cached bootp response/dhcp ack */
extern struct bootp *bootp_response;
extern size_t bootp_response_size;

#endif /* _BOOTP_H_ */