xref: /openbsd-src/usr.sbin/tcpdump/bootp.h (revision 2068f6866b8079dd0e3bc8189f056d1db3480a77)

/*	$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 */