[DHCP]
[reactos.git] / reactos / base / services / dhcp / include / dhcp.h
1 /* $OpenBSD: dhcp.h,v 1.5 2004/05/04 15:49:49 deraadt Exp $ */
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 (14 + /* Ethernet header */ \
44 20 + /* IP header */ \
45 8) /* UDP header */
46 #define DHCP_SNAME_LEN 64
47 #define DHCP_FILE_LEN 128
48 #define DHCP_FIXED_NON_UDP 236
49 #define DHCP_FIXED_LEN (DHCP_FIXED_NON_UDP + DHCP_UDP_OVERHEAD)
50 /* Everything but options. */
51 #define DHCP_MTU_MAX 1500
52 #define DHCP_OPTION_LEN (DHCP_MTU_MAX - DHCP_FIXED_LEN)
53
54 #define BOOTP_MIN_LEN 300
55 #define DHCP_MIN_LEN 548
56
57 struct dhcp_packet {
58 u_int8_t op; /* Message opcode/type */
59 u_int8_t htype; /* Hardware addr type (see net/if_types.h) */
60 u_int8_t hlen; /* Hardware addr length */
61 u_int8_t hops; /* Number of relay agent hops from client */
62 u_int32_t xid; /* Transaction ID */
63 u_int16_t secs; /* Seconds since client started looking */
64 u_int16_t flags; /* Flag bits */
65 struct in_addr ciaddr; /* Client IP address (if already in use) */
66 struct in_addr yiaddr; /* Client IP address */
67 struct in_addr siaddr; /* IP address of next server to talk to */
68 struct in_addr giaddr; /* DHCP relay agent IP address */
69 unsigned char chaddr[16]; /* Client hardware address */
70 char sname[DHCP_SNAME_LEN]; /* Server name */
71 char file[DHCP_FILE_LEN]; /* Boot filename */
72 unsigned char options[DHCP_OPTION_LEN];
73 /* Optional parameters
74 (actual length dependent on MTU). */
75 };
76
77 /* BOOTP (rfc951) message types */
78 #define BOOTREQUEST 1
79 #define BOOTREPLY 2
80
81 /* Possible values for flags field... */
82 #define BOOTP_BROADCAST 32768L
83
84 /* Possible values for hardware type (htype) field... */
85 #define HTYPE_ETHER 1 /* Ethernet */
86 #define HTYPE_IEEE802 6 /* IEEE 802.2 Token Ring... */
87 #define HTYPE_FDDI 8 /* FDDI... */
88
89 /* Magic cookie validating dhcp options field (and bootp vendor
90 extensions field). */
91 #define DHCP_OPTIONS_COOKIE "\143\202\123\143"
92
93
94 /* DHCP Option codes: */
95
96 #define DHO_PAD 0
97 #define DHO_SUBNET_MASK 1
98 #define DHO_TIME_OFFSET 2
99 #define DHO_ROUTERS 3
100 #define DHO_TIME_SERVERS 4
101 #define DHO_NAME_SERVERS 5
102 #define DHO_DOMAIN_NAME_SERVERS 6
103 #define DHO_LOG_SERVERS 7
104 #define DHO_COOKIE_SERVERS 8
105 #define DHO_LPR_SERVERS 9
106 #define DHO_IMPRESS_SERVERS 10
107 #define DHO_RESOURCE_LOCATION_SERVERS 11
108 #define DHO_HOST_NAME 12
109 #define DHO_BOOT_SIZE 13
110 #define DHO_MERIT_DUMP 14
111 #define DHO_DOMAIN_NAME 15
112 #define DHO_SWAP_SERVER 16
113 #define DHO_ROOT_PATH 17
114 #define DHO_EXTENSIONS_PATH 18
115 #define DHO_IP_FORWARDING 19
116 #define DHO_NON_LOCAL_SOURCE_ROUTING 20
117 #define DHO_POLICY_FILTER 21
118 #define DHO_MAX_DGRAM_REASSEMBLY 22
119 #define DHO_DEFAULT_IP_TTL 23
120 #define DHO_PATH_MTU_AGING_TIMEOUT 24
121 #define DHO_PATH_MTU_PLATEAU_TABLE 25
122 #define DHO_INTERFACE_MTU 26
123 #define DHO_ALL_SUBNETS_LOCAL 27
124 #define DHO_BROADCAST_ADDRESS 28
125 #define DHO_PERFORM_MASK_DISCOVERY 29
126 #define DHO_MASK_SUPPLIER 30
127 #define DHO_ROUTER_DISCOVERY 31
128 #define DHO_ROUTER_SOLICITATION_ADDRESS 32
129 #define DHO_STATIC_ROUTES 33
130 #define DHO_TRAILER_ENCAPSULATION 34
131 #define DHO_ARP_CACHE_TIMEOUT 35
132 #define DHO_IEEE802_3_ENCAPSULATION 36
133 #define DHO_DEFAULT_TCP_TTL 37
134 #define DHO_TCP_KEEPALIVE_INTERVAL 38
135 #define DHO_TCP_KEEPALIVE_GARBAGE 39
136 #define DHO_NIS_DOMAIN 40
137 #define DHO_NIS_SERVERS 41
138 #define DHO_NTP_SERVERS 42
139 #define DHO_VENDOR_ENCAPSULATED_OPTIONS 43
140 #define DHO_NETBIOS_NAME_SERVERS 44
141 #define DHO_NETBIOS_DD_SERVER 45
142 #define DHO_NETBIOS_NODE_TYPE 46
143 #define DHO_NETBIOS_SCOPE 47
144 #define DHO_FONT_SERVERS 48
145 #define DHO_X_DISPLAY_MANAGER 49
146 #define DHO_DHCP_REQUESTED_ADDRESS 50
147 #define DHO_DHCP_LEASE_TIME 51
148 #define DHO_DHCP_OPTION_OVERLOAD 52
149 #define DHO_DHCP_MESSAGE_TYPE 53
150 #define DHO_DHCP_SERVER_IDENTIFIER 54
151 #define DHO_DHCP_PARAMETER_REQUEST_LIST 55
152 #define DHO_DHCP_MESSAGE 56
153 #define DHO_DHCP_MAX_MESSAGE_SIZE 57
154 #define DHO_DHCP_RENEWAL_TIME 58
155 #define DHO_DHCP_REBINDING_TIME 59
156 #define DHO_DHCP_CLASS_IDENTIFIER 60
157 #define DHO_DHCP_CLIENT_IDENTIFIER 61
158 #define DHO_DHCP_USER_CLASS_ID 77
159 #define DHO_END 255
160
161 /* DHCP message types. */
162 #define DHCPDISCOVER 1
163 #define DHCPOFFER 2
164 #define DHCPREQUEST 3
165 #define DHCPDECLINE 4
166 #define DHCPACK 5
167 #define DHCPNAK 6
168 #define DHCPRELEASE 7
169 #define DHCPINFORM 8