/*      $OpenBSD: bootp.h,v 1.8 2007/10/07 16:41:05 deraadt Exp $       */

/* @(#) $Id: bootp.h,v 1.8 2007/10/07 16:41:05 deraadt Exp $ (LBL) */
/*
 * 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.
 */


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 */
        u_int32_t       bp_xid;         /* transaction ID */
        unsigned short  bp_secs;        /* seconds since boot began */
        unsigned short  bp_flags;       /* flags: 0x8000 is broadcast */
        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 */
        unsigned char   bp_file[128];   /* boot file name */
        unsigned char   bp_vend[64];    /* 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_END                 ((unsigned char) 255)
/* RFC1497 tags */
#define TAG_DUMPPATH            ((unsigned char)  14)
#define TAG_DOMAINNAME          ((unsigned char)  15)
#define TAG_SWAP_SERVER         ((unsigned char)  16)
#define TAG_ROOTPATH            ((unsigned char)  17)
#define TAG_EXTPATH             ((unsigned char)  18)
/* RFC2132 */
#define TAG_IP_FORWARD          ((unsigned char)  19)
#define TAG_NL_SRCRT            ((unsigned char)  20)
#define TAG_PFILTERS            ((unsigned char)  21)
#define TAG_REASS_SIZE          ((unsigned char)  22)
#define TAG_DEF_TTL             ((unsigned char)  23)
#define TAG_MTU_TIMEOUT         ((unsigned char)  24)
#define TAG_MTU_TABLE           ((unsigned char)  25)
#define TAG_INT_MTU             ((unsigned char)  26)
#define TAG_LOCAL_SUBNETS       ((unsigned char)  27)
#define TAG_BROAD_ADDR          ((unsigned char)  28)
#define TAG_DO_MASK_DISC        ((unsigned char)  29)
#define TAG_SUPPLY_MASK         ((unsigned char)  30)
#define TAG_DO_RDISC            ((unsigned char)  31)
#define TAG_RTR_SOL_ADDR        ((unsigned char)  32)
#define TAG_STATIC_ROUTE        ((unsigned char)  33)
#define TAG_USE_TRAILERS        ((unsigned char)  34)
#define TAG_ARP_TIMEOUT         ((unsigned char)  35)
#define TAG_ETH_ENCAP           ((unsigned char)  36)
#define TAG_TCP_TTL             ((unsigned char)  37)
#define TAG_TCP_KEEPALIVE       ((unsigned char)  38)
#define TAG_KEEPALIVE_GO        ((unsigned char)  39)
#define TAG_NIS_DOMAIN          ((unsigned char)  40)
#define TAG_NIS_SERVERS         ((unsigned char)  41)
#define TAG_NTP_SERVERS         ((unsigned char)  42)
#define TAG_VENDOR_OPTS         ((unsigned char)  43)
#define TAG_NETBIOS_NS          ((unsigned char)  44)
#define TAG_NETBIOS_DDS         ((unsigned char)  45)
#define TAG_NETBIOS_NODE        ((unsigned char)  46)
#define TAG_NETBIOS_SCOPE       ((unsigned char)  47)
#define TAG_XWIN_FS             ((unsigned char)  48)
#define TAG_XWIN_DM             ((unsigned char)  49)
#define TAG_NIS_P_DOMAIN        ((unsigned char)  64)
#define TAG_NIS_P_SERVERS       ((unsigned char)  65)
#define TAG_MOBILE_HOME         ((unsigned char)  68)
#define TAG_SMPT_SERVER         ((unsigned char)  69)
#define TAG_POP3_SERVER         ((unsigned char)  70)
#define TAG_NNTP_SERVER         ((unsigned char)  71)
#define TAG_WWW_SERVER          ((unsigned char)  72)
#define TAG_FINGER_SERVER       ((unsigned char)  73)
#define TAG_IRC_SERVER          ((unsigned char)  74)
#define TAG_STREETTALK_SRVR     ((unsigned char)  75)
#define TAG_STREETTALK_STDA     ((unsigned char)  76)
/* DHCP options */
#define TAG_REQUESTED_IP        ((unsigned char)  50)
#define TAG_IP_LEASE            ((unsigned char)  51)
#define TAG_OPT_OVERLOAD        ((unsigned char)  52)
#define TAG_TFTP_SERVER         ((unsigned char)  66)
#define TAG_BOOTFILENAME        ((unsigned char)  67)
#define TAG_DHCP_MESSAGE        ((unsigned char)  53)
#define TAG_SERVER_ID           ((unsigned char)  54)
#define TAG_PARM_REQUEST        ((unsigned char)  55)
#define TAG_MESSAGE             ((unsigned char)  56)
#define TAG_MAX_MSG_SIZE        ((unsigned char)  57)
#define TAG_RENEWAL_TIME        ((unsigned char)  58)
#define TAG_REBIND_TIME         ((unsigned char)  59)
#define TAG_VENDOR_CLASS        ((unsigned char)  60)
#define TAG_CLIENT_ID           ((unsigned char)  61)

/* DHCP Message types (values for TAG_DHCP_MESSAGE option) */
#define         DHCPDISCOVER    1
#define         DHCPOFFER       2
#define         DHCPREQUEST     3
#define         DHCPDECLINE     4
#define         DHCPACK         5
#define         DHCPNAK         6
#define         DHCPRELEASE     7
#define         DHCPINFORM      8


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

struct cmu_vend {
        unsigned char   v_magic[4];     /* magic number */
        u_int32_t       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[24];   /* currently unused */
};


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