source: bootcd/isolinux/syslinux-6.03/gpxe/src/include/bootp.h

#ifndef _BOOTP_H
#define _BOOTP_H

#ifdef  ALTERNATE_DHCP_PORTS_1067_1068
#undef  NON_STANDARD_BOOTP_SERVER
#define NON_STANDARD_BOOTP_SERVER       1067
#undef  NON_STANDARD_BOOTP_CLIENT
#define NON_STANDARD_BOOTP_CLIENT       1068
#endif

#ifdef  NON_STANDARD_BOOTP_SERVER
#define BOOTP_SERVER    NON_STANDARD_BOOTP_SERVER
#else
#define BOOTP_SERVER    67
#endif
#ifdef  NON_STANDARD_BOOTP_CLIENT
#define BOOTP_CLIENT    NON_STANDARD_BOOTP_CLIENT
#else
#define BOOTP_CLIENT    68
#endif
#define PROXYDHCP_SERVER        4011 /* For PXE */

#define BOOTP_REQUEST   1
#define BOOTP_REPLY     2

#define TAG_LEN(p)              (*((p)+1))
#define RFC1533_COOKIE          99, 130, 83, 99
#define RFC1533_PAD             0
#define RFC1533_NETMASK         1
#define RFC1533_TIMEOFFSET      2
#define RFC1533_GATEWAY         3
#define RFC1533_TIMESERVER      4
#define RFC1533_IEN116NS        5
#define RFC1533_DNS             6
#define RFC1533_LOGSERVER       7
#define RFC1533_COOKIESERVER    8
#define RFC1533_LPRSERVER       9
#define RFC1533_IMPRESSSERVER   10
#define RFC1533_RESOURCESERVER  11
#define RFC1533_HOSTNAME        12
#define RFC1533_BOOTFILESIZE    13
#define RFC1533_MERITDUMPFILE   14
#define RFC1533_DOMAINNAME      15
#define RFC1533_SWAPSERVER      16
#define RFC1533_ROOTPATH        17
#define RFC1533_EXTENSIONPATH   18
#define RFC1533_IPFORWARDING    19
#define RFC1533_IPSOURCEROUTING 20
#define RFC1533_IPPOLICYFILTER  21
#define RFC1533_IPMAXREASSEMBLY 22
#define RFC1533_IPTTL           23
#define RFC1533_IPMTU           24
#define RFC1533_IPMTUPLATEAU    25
#define RFC1533_INTMTU          26
#define RFC1533_INTLOCALSUBNETS 27
#define RFC1533_INTBROADCAST    28
#define RFC1533_INTICMPDISCOVER 29
#define RFC1533_INTICMPRESPOND  30
#define RFC1533_INTROUTEDISCOVER 31
#define RFC1533_INTROUTESOLICIT 32
#define RFC1533_INTSTATICROUTES 33
#define RFC1533_LLTRAILERENCAP  34
#define RFC1533_LLARPCACHETMO   35
#define RFC1533_LLETHERNETENCAP 36
#define RFC1533_TCPTTL          37
#define RFC1533_TCPKEEPALIVETMO 38
#define RFC1533_TCPKEEPALIVEGB  39
#define RFC1533_NISDOMAIN       40
#define RFC1533_NISSERVER       41
#define RFC1533_NTPSERVER       42
#define RFC1533_VENDOR          43
#define RFC1533_NBNS            44
#define RFC1533_NBDD            45
#define RFC1533_NBNT            46
#define RFC1533_NBSCOPE         47
#define RFC1533_XFS             48
#define RFC1533_XDM             49
#ifndef NO_DHCP_SUPPORT
#define RFC2132_REQ_ADDR        50
#define RFC2132_MSG_TYPE        53
#define RFC2132_SRV_ID          54
#define RFC2132_PARAM_LIST      55
#define RFC2132_MAX_SIZE        57
#define RFC2132_VENDOR_CLASS_ID 60
#define RFC2132_CLIENT_ID       61
#define RFC2132_TFTP_SERVER_NAME 66
#define RFC2132_BOOTFILE_NAME   67
#define RFC3004_USER_CLASS      77

#ifdef PXE_DHCP_STRICT
/*
 * The following options are acknowledged in RFC3679 because they are
 * widely used by PXE implementations, but have never been properly
 * allocated. Despite other PXE options being correctly packed in a
 * vendor encapsulated field, these are exposed. Sigh.  Note that the
 * client UUID (option 97) is also noted in the PXE spec as using
 * option 61.
 */
#define RFC3679_PXE_CLIENT_ARCH 93
#define RFC3679_PXE_CLIENT_NDI  94
#define RFC3679_PXE_CLIENT_UUID 97

/* The lengths are fixed. */
#define RFC3679_PXE_CLIENT_ARCH_LENGTH 2
#define RFC3679_PXE_CLIENT_NDI_LENGTH 3
#define RFC3679_PXE_CLIENT_UUID_LENGTH 17

/*
 * Values of RFC3679_PXE_CLIENT_ARCH can apparently be one of the
 * following, according to the PXE spec. The spec only actually
 * described the 2nd octet, not the first. Duh... assume 0.
 */
#define RFC3679_PXE_CLIENT_ARCH_IAX86PC   0,0
#define RFC3679_PXE_CLIENT_ARCH_NECPC98   0,1
#define RFC3679_PXE_CLIENT_ARCH_IA64PC    0,2
#define RFC3679_PXE_CLIENT_ARCH_DECALPHA  0,3
#define RFC3679_PXE_CLIENT_ARCH_ARCX86    0,4
#define RFC3679_PXE_CLIENT_ARCH_INTELLEAN 0,5

/* 
 * Only one valid value of NDI type (must be 1) and UNDI version (must
 * be 2.1)
 */
#define RFC3679_PXE_CLIENT_NDI_21 1,2,1

/*
 * UUID - type must be 1 and then 16 octets of UID, as with the client ID.
 * The value is a default for testing only
 */
#define RFC3679_PXE_CLIENT_UUID_TYPE 0
#warning "UUID is a default for testing ONLY!"
#define RFC3679_PXE_CLIENT_UUID_DEFAULT \
        RFC3679_PXE_CLIENT_UUID_TYPE, \
        0xDE,0xAD,0xBE,0xEF, \
        0xDE,0xAD,0xBE,0xEF, \
        0xDE,0xAD,0xBE,0xEF, \
        0xDE,0xAD,0xBE,0xEF
/*
 * The Vendor Class ID. Note that the Arch and UNDI version numbers
 * are fixed and must be same as the ARCH and NDI above.
 */
#define RFC2132_VENDOR_CLASS_ID_PXE_LENGTH 32
#define RFC2132_VENDOR_CLASS_ID_PXE \
        'P','X','E','C','l','i','e','n','t',':', \
        'A','r','c','h',':','0','0','0','0','0',':', \
        'U','N','D','I',':','0','0','2','0','0','1'

/*
 * The following vendor options are required in the PXE spec to pull
 * options for the *next* image. The PXE spec doesn't help us with
 * this (like explaining why).
 */
#define RFC1533_VENDOR_PXE_OPT128 128
#define RFC1533_VENDOR_PXE_OPT129 129
#define RFC1533_VENDOR_PXE_OPT130 130
#define RFC1533_VENDOR_PXE_OPT131 131
#define RFC1533_VENDOR_PXE_OPT132 132
#define RFC1533_VENDOR_PXE_OPT133 133
#define RFC1533_VENDOR_PXE_OPT134 134
#define RFC1533_VENDOR_PXE_OPT135 135

#endif /* PXE_DHCP_STRICT */

#define DHCPDISCOVER            1
#define DHCPOFFER               2
#define DHCPREQUEST             3
#define DHCPACK                 5
#endif  /* NO_DHCP_SUPPORT */

#define RFC1533_VENDOR_MAJOR    0
#define RFC1533_VENDOR_MINOR    0

#define RFC1533_VENDOR_MAGIC    128
#define RFC1533_VENDOR_ADDPARM  129
#define RFC1533_VENDOR_ETHDEV   130
/* We should really apply for an official Etherboot encap option */
#define RFC1533_VENDOR_ETHERBOOT_ENCAP 150
/* I'll leave it to FREEBSD to decide if they want to renumber */
#ifdef  IMAGE_FREEBSD
#define RFC1533_VENDOR_HOWTO    132
#define RFC1533_VENDOR_KERNEL_ENV    133
#endif
#define RFC1533_VENDOR_NIC_DEV_ID 175
#define RFC1533_VENDOR_ARCH     177

#define RFC1533_END             255

#define BOOTP_VENDOR_LEN        64
#ifndef NO_DHCP_SUPPORT
#define DHCP_OPT_LEN            312
#endif  /* NO_DHCP_SUPPORT */

/* Format of a bootp packet */
struct bootp_t {
        uint8_t  bp_op;
        uint8_t  bp_htype;
        uint8_t  bp_hlen;
        uint8_t  bp_hops;
        uint32_t bp_xid;
        uint16_t bp_secs;
        uint16_t unused;
        in_addr bp_ciaddr;
        in_addr bp_yiaddr;
        in_addr bp_siaddr;
        in_addr bp_giaddr;
        uint8_t  bp_hwaddr[16];
        uint8_t  bp_sname[64];
        char     bp_file[128];
#ifdef  NO_DHCP_SUPPORT
        uint8_t  bp_vend[BOOTP_VENDOR_LEN];
#else
        uint8_t  bp_vend[DHCP_OPT_LEN];
#endif  /* NO_DHCP_SUPPORT */
};

/* Format of a bootp IP packet */
struct bootpip_t
{
        struct iphdr ip;
        struct udphdr udp;
        struct bootp_t bp;
};

/* Format of bootp packet with extensions */
struct bootpd_t {
        struct bootp_t bootp_reply;
        uint8_t bootp_extension[MAX_BOOTP_EXTLEN];
};

#endif  /* _BOOTP_H */