4d18a6391e
The original DHCP specification includes a route option but it supports only class-based routes. RFC3442 adds support for specifying the netmask width for each static route. A variable length encoding is used to minimize the size of this option. PR: bin/99534 Submitted by: Andrey V. Elsukov <bu7cher@yandex.ru> Reviewed by: brooks
177 lines
6.2 KiB
C
177 lines
6.2 KiB
C
/* $OpenBSD: dhcp.h,v 1.5 2004/05/04 15:49:49 deraadt Exp $ */
|
|
/* $FreeBSD$ */
|
|
|
|
/* Protocol structures... */
|
|
|
|
/*
|
|
* Copyright (c) 1995, 1996 The Internet Software Consortium.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. Neither the name of The Internet Software Consortium nor the names
|
|
* of its contributors may be used to endorse or promote products derived
|
|
* from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE INTERNET SOFTWARE CONSORTIUM AND
|
|
* CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
|
|
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
* DISCLAIMED. IN NO EVENT SHALL THE INTERNET SOFTWARE CONSORTIUM OR
|
|
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
|
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
|
|
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
|
|
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
|
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
|
|
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* This software has been written for the Internet Software Consortium
|
|
* by Ted Lemon <mellon@fugue.com> in cooperation with Vixie
|
|
* Enterprises. To learn more about the Internet Software Consortium,
|
|
* see ``http://www.vix.com/isc''. To learn more about Vixie
|
|
* Enterprises, see ``http://www.vix.com''.
|
|
*/
|
|
|
|
#define DHCP_UDP_OVERHEAD (14 + /* Ethernet header */ \
|
|
20 + /* IP header */ \
|
|
8) /* UDP header */
|
|
#define DHCP_SNAME_LEN 64
|
|
#define DHCP_FILE_LEN 128
|
|
#define DHCP_FIXED_NON_UDP 236
|
|
#define DHCP_FIXED_LEN (DHCP_FIXED_NON_UDP + DHCP_UDP_OVERHEAD)
|
|
/* Everything but options. */
|
|
#define DHCP_MTU_MAX 1500
|
|
#define DHCP_OPTION_LEN (DHCP_MTU_MAX - DHCP_FIXED_LEN)
|
|
|
|
#define BOOTP_MIN_LEN 300
|
|
#define DHCP_MIN_LEN 548
|
|
|
|
struct dhcp_packet {
|
|
u_int8_t op; /* Message opcode/type */
|
|
u_int8_t htype; /* Hardware addr type (see net/if_types.h) */
|
|
u_int8_t hlen; /* Hardware addr length */
|
|
u_int8_t hops; /* Number of relay agent hops from client */
|
|
u_int32_t xid; /* Transaction ID */
|
|
u_int16_t secs; /* Seconds since client started looking */
|
|
u_int16_t flags; /* Flag bits */
|
|
struct in_addr ciaddr; /* Client IP address (if already in use) */
|
|
struct in_addr yiaddr; /* Client IP address */
|
|
struct in_addr siaddr; /* IP address of next server to talk to */
|
|
struct in_addr giaddr; /* DHCP relay agent IP address */
|
|
unsigned char chaddr[16]; /* Client hardware address */
|
|
char sname[DHCP_SNAME_LEN]; /* Server name */
|
|
char file[DHCP_FILE_LEN]; /* Boot filename */
|
|
unsigned char options[DHCP_OPTION_LEN];
|
|
/* Optional parameters
|
|
(actual length dependent on MTU). */
|
|
};
|
|
|
|
/* BOOTP (rfc951) message types */
|
|
#define BOOTREQUEST 1
|
|
#define BOOTREPLY 2
|
|
|
|
/* Possible values for flags field... */
|
|
#define BOOTP_BROADCAST 32768L
|
|
|
|
/* Possible values for hardware type (htype) field... */
|
|
#define HTYPE_ETHER 1 /* Ethernet */
|
|
#define HTYPE_IEEE802 6 /* IEEE 802.2 Token Ring... */
|
|
#define HTYPE_FDDI 8 /* FDDI... */
|
|
|
|
/* Magic cookie validating dhcp options field (and bootp vendor
|
|
extensions field). */
|
|
#define DHCP_OPTIONS_COOKIE "\143\202\123\143"
|
|
|
|
/* DHCP Option codes: */
|
|
|
|
#define DHO_PAD 0
|
|
#define DHO_SUBNET_MASK 1
|
|
#define DHO_TIME_OFFSET 2
|
|
#define DHO_ROUTERS 3
|
|
#define DHO_TIME_SERVERS 4
|
|
#define DHO_NAME_SERVERS 5
|
|
#define DHO_DOMAIN_NAME_SERVERS 6
|
|
#define DHO_LOG_SERVERS 7
|
|
#define DHO_COOKIE_SERVERS 8
|
|
#define DHO_LPR_SERVERS 9
|
|
#define DHO_IMPRESS_SERVERS 10
|
|
#define DHO_RESOURCE_LOCATION_SERVERS 11
|
|
#define DHO_HOST_NAME 12
|
|
#define DHO_BOOT_SIZE 13
|
|
#define DHO_MERIT_DUMP 14
|
|
#define DHO_DOMAIN_NAME 15
|
|
#define DHO_SWAP_SERVER 16
|
|
#define DHO_ROOT_PATH 17
|
|
#define DHO_EXTENSIONS_PATH 18
|
|
#define DHO_IP_FORWARDING 19
|
|
#define DHO_NON_LOCAL_SOURCE_ROUTING 20
|
|
#define DHO_POLICY_FILTER 21
|
|
#define DHO_MAX_DGRAM_REASSEMBLY 22
|
|
#define DHO_DEFAULT_IP_TTL 23
|
|
#define DHO_PATH_MTU_AGING_TIMEOUT 24
|
|
#define DHO_PATH_MTU_PLATEAU_TABLE 25
|
|
#define DHO_INTERFACE_MTU 26
|
|
#define DHO_ALL_SUBNETS_LOCAL 27
|
|
#define DHO_BROADCAST_ADDRESS 28
|
|
#define DHO_PERFORM_MASK_DISCOVERY 29
|
|
#define DHO_MASK_SUPPLIER 30
|
|
#define DHO_ROUTER_DISCOVERY 31
|
|
#define DHO_ROUTER_SOLICITATION_ADDRESS 32
|
|
#define DHO_STATIC_ROUTES 33
|
|
#define DHO_TRAILER_ENCAPSULATION 34
|
|
#define DHO_ARP_CACHE_TIMEOUT 35
|
|
#define DHO_IEEE802_3_ENCAPSULATION 36
|
|
#define DHO_DEFAULT_TCP_TTL 37
|
|
#define DHO_TCP_KEEPALIVE_INTERVAL 38
|
|
#define DHO_TCP_KEEPALIVE_GARBAGE 39
|
|
#define DHO_NIS_DOMAIN 40
|
|
#define DHO_NIS_SERVERS 41
|
|
#define DHO_NTP_SERVERS 42
|
|
#define DHO_VENDOR_ENCAPSULATED_OPTIONS 43
|
|
#define DHO_NETBIOS_NAME_SERVERS 44
|
|
#define DHO_NETBIOS_DD_SERVER 45
|
|
#define DHO_NETBIOS_NODE_TYPE 46
|
|
#define DHO_NETBIOS_SCOPE 47
|
|
#define DHO_FONT_SERVERS 48
|
|
#define DHO_X_DISPLAY_MANAGER 49
|
|
#define DHO_DHCP_REQUESTED_ADDRESS 50
|
|
#define DHO_DHCP_LEASE_TIME 51
|
|
#define DHO_DHCP_OPTION_OVERLOAD 52
|
|
#define DHO_DHCP_MESSAGE_TYPE 53
|
|
#define DHO_DHCP_SERVER_IDENTIFIER 54
|
|
#define DHO_DHCP_PARAMETER_REQUEST_LIST 55
|
|
#define DHO_DHCP_MESSAGE 56
|
|
#define DHO_DHCP_MAX_MESSAGE_SIZE 57
|
|
#define DHO_DHCP_RENEWAL_TIME 58
|
|
#define DHO_DHCP_REBINDING_TIME 59
|
|
#define DHO_DHCP_CLASS_IDENTIFIER 60
|
|
#define DHO_DHCP_CLIENT_IDENTIFIER 61
|
|
#define DHO_SMTP_SERVER 69
|
|
#define DHO_POP_SERVER 70
|
|
#define DHO_NNTP_SERVER 71
|
|
#define DHO_WWW_SERVER 72
|
|
#define DHO_FINGER_SERVER 73
|
|
#define DHO_IRC_SERVER 74
|
|
#define DHO_DHCP_USER_CLASS_ID 77
|
|
#define DHO_CLASSLESS_ROUTES 121
|
|
#define DHO_END 255
|
|
|
|
/* DHCP message types. */
|
|
#define DHCPDISCOVER 1
|
|
#define DHCPOFFER 2
|
|
#define DHCPREQUEST 3
|
|
#define DHCPDECLINE 4
|
|
#define DHCPACK 5
|
|
#define DHCPNAK 6
|
|
#define DHCPRELEASE 7
|
|
#define DHCPINFORM 8
|