dhclient - Sequential options processing more friendly.
[dragonfly.git] / sbin / dhclient / dhcp.h
CommitLineData
741bbb9f 1/* $OpenBSD: src/sbin/dhclient/dhcp.h,v 1.9 2011/05/11 14:38:36 krw Exp $ */
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2
3/* Protocol structures... */
4
5/*
6 * Copyright (c) 1995, 1996 The Internet Software Consortium.
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 *
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of The Internet Software Consortium nor the names
19 * of its contributors may be used to endorse or promote products derived
20 * from this software without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE INTERNET SOFTWARE CONSORTIUM AND
23 * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
24 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE INTERNET SOFTWARE CONSORTIUM OR
27 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
28 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
29 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
30 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
31 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
32 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
33 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 * This software has been written for the Internet Software Consortium
37 * by Ted Lemon <mellon@fugue.com> in cooperation with Vixie
38 * Enterprises. To learn more about the Internet Software Consortium,
39 * see ``http://www.vix.com/isc''. To learn more about Vixie
40 * Enterprises, see ``http://www.vix.com''.
41 */
42
43#define DHCP_UDP_OVERHEAD (20 + /* IP header */ \
44 8) /* UDP header */
45#define DHCP_SNAME_LEN 64
46#define DHCP_FILE_LEN 128
47#define DHCP_FIXED_NON_UDP 236
48#define DHCP_FIXED_LEN (DHCP_FIXED_NON_UDP + DHCP_UDP_OVERHEAD)
49 /* Everything but options. */
50#define DHCP_MTU_MAX 1500
51#define DHCP_OPTION_LEN (DHCP_MTU_MAX - DHCP_FIXED_LEN)
52
53#define BOOTP_MIN_LEN 300
54
55struct dhcp_packet {
56 u_int8_t op; /* Message opcode/type */
57 u_int8_t htype; /* Hardware addr type (see net/if_types.h) */
58 u_int8_t hlen; /* Hardware addr length */
59 u_int8_t hops; /* Number of relay agent hops from client */
60 u_int32_t xid; /* Transaction ID */
61 u_int16_t secs; /* Seconds since client started looking */
62 u_int16_t flags; /* Flag bits */
63 struct in_addr ciaddr; /* Client IP address (if already in use) */
64 struct in_addr yiaddr; /* Client IP address */
65 struct in_addr siaddr; /* IP address of next server to talk to */
66 struct in_addr giaddr; /* DHCP relay agent IP address */
67 unsigned char chaddr[16]; /* Client hardware address */
68 char sname[DHCP_SNAME_LEN]; /* Server name */
69 char file[DHCP_FILE_LEN]; /* Boot filename */
70 unsigned char options[DHCP_OPTION_LEN];
71 /* Optional parameters
72 (actual length dependent on MTU). */
73};
74
75/* BOOTP (rfc951) message types */
76#define BOOTREQUEST 1
77#define BOOTREPLY 2
78
79/* Possible values for flags field... */
80#define BOOTP_BROADCAST 32768L
81
82/* Possible values for hardware type (htype) field... */
83#define HTYPE_ETHER 1 /* Ethernet */
84#define HTYPE_IEEE802 6 /* IEEE 802.2 Token Ring... */
85#define HTYPE_FDDI 8 /* FDDI... */
86
87/* Magic cookie validating dhcp options field (and bootp vendor
88 extensions field). */
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89#define DHCP_OPTIONS_COOKIE "\143\202\123\143"
90#define DHCP_OPTIONS_MESSAGE_TYPE "\065\001\000"
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91
92/* DHCP Option codes: */
93
94#define DHO_PAD 0
95#define DHO_SUBNET_MASK 1
96#define DHO_TIME_OFFSET 2
97#define DHO_ROUTERS 3
98#define DHO_TIME_SERVERS 4
99#define DHO_NAME_SERVERS 5
100#define DHO_DOMAIN_NAME_SERVERS 6
101#define DHO_LOG_SERVERS 7
102#define DHO_COOKIE_SERVERS 8
103#define DHO_LPR_SERVERS 9
104#define DHO_IMPRESS_SERVERS 10
105#define DHO_RESOURCE_LOCATION_SERVERS 11
106#define DHO_HOST_NAME 12
107#define DHO_BOOT_SIZE 13
108#define DHO_MERIT_DUMP 14
109#define DHO_DOMAIN_NAME 15
110#define DHO_SWAP_SERVER 16
111#define DHO_ROOT_PATH 17
112#define DHO_EXTENSIONS_PATH 18
113#define DHO_IP_FORWARDING 19
114#define DHO_NON_LOCAL_SOURCE_ROUTING 20
115#define DHO_POLICY_FILTER 21
116#define DHO_MAX_DGRAM_REASSEMBLY 22
117#define DHO_DEFAULT_IP_TTL 23
118#define DHO_PATH_MTU_AGING_TIMEOUT 24
119#define DHO_PATH_MTU_PLATEAU_TABLE 25
120#define DHO_INTERFACE_MTU 26
121#define DHO_ALL_SUBNETS_LOCAL 27
122#define DHO_BROADCAST_ADDRESS 28
123#define DHO_PERFORM_MASK_DISCOVERY 29
124#define DHO_MASK_SUPPLIER 30
125#define DHO_ROUTER_DISCOVERY 31
126#define DHO_ROUTER_SOLICITATION_ADDRESS 32
127#define DHO_STATIC_ROUTES 33
128#define DHO_TRAILER_ENCAPSULATION 34
129#define DHO_ARP_CACHE_TIMEOUT 35
130#define DHO_IEEE802_3_ENCAPSULATION 36
131#define DHO_DEFAULT_TCP_TTL 37
132#define DHO_TCP_KEEPALIVE_INTERVAL 38
133#define DHO_TCP_KEEPALIVE_GARBAGE 39
134#define DHO_NIS_DOMAIN 40
135#define DHO_NIS_SERVERS 41
136#define DHO_NTP_SERVERS 42
137#define DHO_VENDOR_ENCAPSULATED_OPTIONS 43
138#define DHO_NETBIOS_NAME_SERVERS 44
139#define DHO_NETBIOS_DD_SERVER 45
140#define DHO_NETBIOS_NODE_TYPE 46
141#define DHO_NETBIOS_SCOPE 47
142#define DHO_FONT_SERVERS 48
143#define DHO_X_DISPLAY_MANAGER 49
144#define DHO_DHCP_REQUESTED_ADDRESS 50
145#define DHO_DHCP_LEASE_TIME 51
146#define DHO_DHCP_OPTION_OVERLOAD 52
147#define DHO_DHCP_MESSAGE_TYPE 53
148#define DHO_DHCP_SERVER_IDENTIFIER 54
149#define DHO_DHCP_PARAMETER_REQUEST_LIST 55
150#define DHO_DHCP_MESSAGE 56
151#define DHO_DHCP_MAX_MESSAGE_SIZE 57
152#define DHO_DHCP_RENEWAL_TIME 58
153#define DHO_DHCP_REBINDING_TIME 59
154#define DHO_DHCP_CLASS_IDENTIFIER 60
155#define DHO_DHCP_CLIENT_IDENTIFIER 61
7a6ba664 156#define DHO_TFTP_SERVER 66
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157#define DHO_DHCP_USER_CLASS_ID 77
158#define DHO_END 255
159
160/* DHCP message types. */
161#define DHCPDISCOVER 1
162#define DHCPOFFER 2
163#define DHCPREQUEST 3
164#define DHCPDECLINE 4
165#define DHCPACK 5
166#define DHCPNAK 6
167#define DHCPRELEASE 7
168#define DHCPINFORM 8