CoCalc -- dhcp.h

GitHub Repository: freebsd/freebsd-src
Path: blob/main/sbin/dhclient/dhcp.h
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/*	$OpenBSD: dhcp.h,v 1.5 2004/05/04 15:49:49 deraadt Exp $	*/
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/* Protocol structures... */
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/*-
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 * SPDX-License-Identifier: BSD-3-Clause
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 *
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 * Copyright (c) 1995, 1996 The Internet Software Consortium.
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * 1. Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in the
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 *    documentation and/or other materials provided with the distribution.
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 * 3. Neither the name of The Internet Software Consortium nor the names
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 *    of its contributors may be used to endorse or promote products derived
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 *    from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE INTERNET SOFTWARE CONSORTIUM AND
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 * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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 * DISCLAIMED.  IN NO EVENT SHALL THE INTERNET SOFTWARE CONSORTIUM OR
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 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * SUCH DAMAGE.
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 *
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 * This software has been written for the Internet Software Consortium
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 * by Ted Lemon <[email protected]> in cooperation with Vixie
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 * Enterprises.  To learn more about the Internet Software Consortium,
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 * see ``http://www.vix.com/isc''.  To learn more about Vixie
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 * Enterprises, see ``http://www.vix.com''.
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 */
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#define DHCP_UDP_OVERHEAD	(14 + /* Ethernet header */	\
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				 20 + /* IP header */		\
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				 8)   /* UDP header */
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#define DHCP_SNAME_LEN		64
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#define DHCP_FILE_LEN		128
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#define DHCP_FIXED_NON_UDP	236
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#define DHCP_FIXED_LEN		(DHCP_FIXED_NON_UDP + DHCP_UDP_OVERHEAD)
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						/* Everything but options. */
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#define DHCP_MTU_MAX		1500
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#define DHCP_OPTION_LEN		(DHCP_MTU_MAX - DHCP_FIXED_LEN)
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#define BOOTP_MIN_LEN		300
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#define DHCP_MIN_LEN		548
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struct dhcp_packet {
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	u_int8_t  op;		/* Message opcode/type */
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	u_int8_t  htype;	/* Hardware addr type (see net/if_types.h) */
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	u_int8_t  hlen;		/* Hardware addr length */
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	u_int8_t  hops;		/* Number of relay agent hops from client */
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	u_int32_t xid;		/* Transaction ID */
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	u_int16_t secs;		/* Seconds since client started looking */
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	u_int16_t flags;	/* Flag bits */
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	struct in_addr ciaddr;	/* Client IP address (if already in use) */
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	struct in_addr yiaddr;	/* Client IP address */
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	struct in_addr siaddr;	/* IP address of next server to talk to */
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	struct in_addr giaddr;	/* DHCP relay agent IP address */
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	unsigned char chaddr[16];	/* Client hardware address */
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	char sname[DHCP_SNAME_LEN];	/* Server name */
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	char file[DHCP_FILE_LEN];	/* Boot filename */
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	unsigned char options[DHCP_OPTION_LEN];
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				/* Optional parameters
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				   (actual length dependent on MTU). */
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};
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/* BOOTP (rfc951) message types */
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#define BOOTREQUEST	1
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#define BOOTREPLY	2
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/* Possible values for flags field... */
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#define BOOTP_BROADCAST 32768L
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/* Possible values for hardware type (htype) field... */
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#define HTYPE_ETHER	1		/* Ethernet			*/
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#define HTYPE_IEEE802	6		/* IEEE 802.2 Token Ring...	*/
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#define HTYPE_FDDI	8		/* FDDI...			*/
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/* Magic cookie validating dhcp options field (and bootp vendor
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   extensions field). */
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#define DHCP_OPTIONS_COOKIE	"\143\202\123\143"
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/* DHCP Option codes: */
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#define DHO_PAD				0
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#define DHO_SUBNET_MASK			1
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#define DHO_TIME_OFFSET			2
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#define DHO_ROUTERS			3
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#define DHO_TIME_SERVERS		4
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#define DHO_NAME_SERVERS		5
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#define DHO_DOMAIN_NAME_SERVERS		6
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#define DHO_LOG_SERVERS			7
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#define DHO_COOKIE_SERVERS		8
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#define DHO_LPR_SERVERS			9
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#define DHO_IMPRESS_SERVERS		10
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#define DHO_RESOURCE_LOCATION_SERVERS	11
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#define DHO_HOST_NAME			12
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#define DHO_BOOT_SIZE			13
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#define DHO_MERIT_DUMP			14
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#define DHO_DOMAIN_NAME			15
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#define DHO_SWAP_SERVER			16
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#define DHO_ROOT_PATH			17
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#define DHO_EXTENSIONS_PATH		18
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#define DHO_IP_FORWARDING		19
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#define DHO_NON_LOCAL_SOURCE_ROUTING	20
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#define DHO_POLICY_FILTER		21
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#define DHO_MAX_DGRAM_REASSEMBLY	22
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#define DHO_DEFAULT_IP_TTL		23
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#define DHO_PATH_MTU_AGING_TIMEOUT	24
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#define DHO_PATH_MTU_PLATEAU_TABLE	25
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#define DHO_INTERFACE_MTU		26
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#define DHO_ALL_SUBNETS_LOCAL		27
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#define DHO_BROADCAST_ADDRESS		28
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#define DHO_PERFORM_MASK_DISCOVERY	29
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#define DHO_MASK_SUPPLIER		30
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#define DHO_ROUTER_DISCOVERY		31
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#define DHO_ROUTER_SOLICITATION_ADDRESS	32
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#define DHO_STATIC_ROUTES		33
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#define DHO_TRAILER_ENCAPSULATION	34
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#define DHO_ARP_CACHE_TIMEOUT		35
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#define DHO_IEEE802_3_ENCAPSULATION	36
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#define DHO_DEFAULT_TCP_TTL		37
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#define DHO_TCP_KEEPALIVE_INTERVAL	38
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#define DHO_TCP_KEEPALIVE_GARBAGE	39
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#define DHO_NIS_DOMAIN			40
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#define DHO_NIS_SERVERS			41
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#define DHO_NTP_SERVERS			42
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#define DHO_VENDOR_ENCAPSULATED_OPTIONS	43
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#define DHO_NETBIOS_NAME_SERVERS	44
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#define DHO_NETBIOS_DD_SERVER		45
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#define DHO_NETBIOS_NODE_TYPE		46
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#define DHO_NETBIOS_SCOPE		47
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#define DHO_FONT_SERVERS		48
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#define DHO_X_DISPLAY_MANAGER		49
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#define DHO_DHCP_REQUESTED_ADDRESS	50
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#define DHO_DHCP_LEASE_TIME		51
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#define DHO_DHCP_OPTION_OVERLOAD	52
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#define DHO_DHCP_MESSAGE_TYPE		53
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#define DHO_DHCP_SERVER_IDENTIFIER	54
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#define DHO_DHCP_PARAMETER_REQUEST_LIST	55
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#define DHO_DHCP_MESSAGE		56
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#define DHO_DHCP_MAX_MESSAGE_SIZE	57
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#define DHO_DHCP_RENEWAL_TIME		58
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#define DHO_DHCP_REBINDING_TIME		59
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#define DHO_DHCP_CLASS_IDENTIFIER	60
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#define DHO_DHCP_CLIENT_IDENTIFIER	61
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#define	DHO_NISPLUS_DOMAIN		64
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#define	DHO_NISPLUS_SERVERS		65
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#define	DHO_TFTP_SERVER_NAME		66
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#define	DHO_BOOTFILE_NAME		67
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#define	DHO_MOBILE_IP_HOME_AGENT	68
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#define DHO_SMTP_SERVER			69
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#define DHO_POP_SERVER			70
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#define DHO_NNTP_SERVER			71
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#define DHO_WWW_SERVER			72
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#define DHO_FINGER_SERVER		73
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#define DHO_IRC_SERVER			74
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#define	DHO_STREETTALK_SERVER		75
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#define	DHO_STREETTALK_DA_SERVER	76
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#define DHO_DHCP_USER_CLASS_ID		77
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#define	DHO_URL				114
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#define	DHO_DOMAIN_SEARCH		119
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#define DHO_SIP_SERVERS			120
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#define DHO_CLASSLESS_ROUTES		121
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#define DHO_V_I_VENDOR_CLASS		124
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#define DHO_V_I_VENDOR_OPTS		125
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#define DHO_END				255
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/* DHCP message types. */
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#define DHCPDISCOVER	1
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#define DHCPOFFER	2
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#define DHCPREQUEST	3
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#define DHCPDECLINE	4
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#define DHCPACK		5
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#define DHCPNAK		6
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#define DHCPRELEASE	7
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#define DHCPINFORM	8
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