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1/* dhcp.h
2
3 Protocol structures... */
4
5/*
6 * Copyright (c) 1995-2001 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 in cooperation with Vixie Enterprises. To learn more
38 * about the Internet Software Consortium, see ``http://www.isc.org''.
39 * To learn more about Vixie Enterprises, see ``http://www.vix.com''.
40 */
41
42#ifndef DHCP_H
43#define DHCP_H
44
45 #define DHCP_UDP_OVERHEAD (14 + /* Ethernet header */ \
46 20 + /* IP header */ \
47 8) /* UDP header */
48 #define DHCP_SNAME_LEN 64
49 #define DHCP_FILE_LEN 128
50 #define DHCP_FIXED_NON_UDP236
51 #define DHCP_FIXED_LEN (DHCP_FIXED_NON_UDP + DHCP_UDP_OVERHEAD)
52 /* Everything but options. */
53 #define DHCP_MTU_MAX 1500
54 #define DHCP_OPTION_LEN (DHCP_MTU_MAX - DHCP_FIXED_LEN)
55
56 #define BOOTP_MIN_LEN 300
57#define DHCP_MIN_LEN 548
58
59struct dhcp_packet {
60 u_int8_t op; /* 0: Message opcode/type */
61 u_int8_t htype;/* 1: Hardware addr type (net/if_types.h) */
62 u_int8_t hlen; /* 2: Hardware addr length */
63 u_int8_t hops; /* 3: Number of relay agent hops from client */
64 u_int32_t xid; /* 4: Transaction ID */
65 u_int16_t secs; /* 8: Seconds since client started looking */
66 u_int16_t flags;/* 10: Flag bits */
67 struct in_addr ciaddr;/* 12: Client IP address (if already in use) */
68 struct in_addr yiaddr;/* 16: Client IP address */
69 struct in_addr siaddr;/* 18: IP address of next server to talk to */
70 struct in_addr giaddr;/* 20: DHCP relay agent IP address */
71 unsigned char chaddr [16];/* 24: Client hardware address */
72 char sname [DHCP_SNAME_LEN];/* 40: Server name */
73 char file [DHCP_FILE_LEN];/* 104: Boot filename */
74 unsigned char options [DHCP_OPTION_LEN];
75 /* 212: Optional parameters
76 (actual length dependent on MTU). */
77};
78
79/* BOOTP (rfc951) message types */
80 #define BOOTREQUEST1
81 #define BOOTREPLY2
82
83/* Possible values for flags field... */
84#define BOOTP_BROADCAST 32768L
85
86/* Possible values for hardware type (htype) field... */
87 #define HTYPE_ETHER1 /* Ethernet 10Mbps */
88 #define HTYPE_IEEE802 6 /* IEEE 802.2 Token Ring...*/
89 #define HTYPE_FDDI 8 /* FDDI... */
90
91/* Magic cookie validating dhcp options field (and bootp vendor
92 extensions field). */
93 #define DHCP_OPTIONS_COOKIE"\143\202\123\143"
94
95/* DHCP Option codes: */
96
97 #define DHO_PAD 0
98 #define DHO_SUBNET_MASK 1
99 #define DHO_TIME_OFFSET 2
100 #define DHO_ROUTERS 3
101 #define DHO_TIME_SERVERS 4
102 #define DHO_NAME_SERVERS 5
103 #define DHO_DOMAIN_NAME_SERVERS 6
104 #define DHO_LOG_SERVERS 7
105 #define DHO_COOKIE_SERVERS 8
106 #define DHO_LPR_SERVERS 9
107 #define DHO_IMPRESS_SERVERS 10
108 #define DHO_RESOURCE_LOCATION_SERVERS11
109 #define DHO_HOST_NAME 12
110 #define DHO_BOOT_SIZE 13
111 #define DHO_MERIT_DUMP 14
112 #define DHO_DOMAIN_NAME 15
113 #define DHO_SWAP_SERVER 16
114 #define DHO_ROOT_PATH 17
115 #define DHO_EXTENSIONS_PATH 18
116 #define DHO_IP_FORWARDING 19
117 #define DHO_NON_LOCAL_SOURCE_ROUTING20
118 #define DHO_POLICY_FILTER 21
119 #define DHO_MAX_DGRAM_REASSEMBLY22
120 #define DHO_DEFAULT_IP_TTL 23
121 #define DHO_PATH_MTU_AGING_TIMEOUT24
122 #define DHO_PATH_MTU_PLATEAU_TABLE25
123 #define DHO_INTERFACE_MTU 26
124 #define DHO_ALL_SUBNETS_LOCAL 27
125 #define DHO_BROADCAST_ADDRESS 28
126 #define DHO_PERFORM_MASK_DISCOVERY29
127 #define DHO_MASK_SUPPLIER 30
128 #define DHO_ROUTER_DISCOVERY 31
129 #define DHO_ROUTER_SOLICITATION_ADDRESS32
130 #define DHO_STATIC_ROUTES 33
131 #define DHO_TRAILER_ENCAPSULATION34
132 #define DHO_ARP_CACHE_TIMEOUT 35
133 #define DHO_IEEE802_3_ENCAPSULATION36
134 #define DHO_DEFAULT_TCP_TTL 37
135 #define DHO_TCP_KEEPALIVE_INTERVAL38
136 #define DHO_TCP_KEEPALIVE_GARBAGE39
137 #define DHO_NIS_DOMAIN 40
138 #define DHO_NIS_SERVERS 41
139 #define DHO_NTP_SERVERS 42
140 #define DHO_VENDOR_ENCAPSULATED_OPTIONS43
141 #define DHO_NETBIOS_NAME_SERVERS44
142 #define DHO_NETBIOS_DD_SERVER 45
143 #define DHO_NETBIOS_NODE_TYPE 46
144 #define DHO_NETBIOS_SCOPE 47
145 #define DHO_FONT_SERVERS 48
146 #define DHO_X_DISPLAY_MANAGER 49
147 #define DHO_DHCP_REQUESTED_ADDRESS50
148 #define DHO_DHCP_LEASE_TIME 51
149 #define DHO_DHCP_OPTION_OVERLOAD52
150 #define DHO_DHCP_MESSAGE_TYPE 53
151 #define DHO_DHCP_SERVER_IDENTIFIER54
152 #define DHO_DHCP_PARAMETER_REQUEST_LIST55
153 #define DHO_DHCP_MESSAGE 56
154 #define DHO_DHCP_MAX_MESSAGE_SIZE57
155 #define DHO_DHCP_RENEWAL_TIME 58
156 #define DHO_DHCP_REBINDING_TIME 59
157 #define DHO_VENDOR_CLASS_IDENTIFIER60
158 #define DHO_DHCP_CLIENT_IDENTIFIER61
159 #define DHO_NWIP_DOMAIN_NAME 62
160 #define DHO_NWIP_SUBOPTIONS 63
161 #define DHO_USER_CLASS 77
162 #define DHO_FQDN 81
163 #define DHO_DHCP_AGENT_OPTIONS 82
164 #define DHO_SUBNET_SELECTION 118 /* RFC3011! */
165/* The DHO_AUTHENTICATE option is not a standard yet, so I've
166 allocated an option out of the "local" option space for it on a
167 temporary basis. Once an option code number is assigned, I will
168 immediately and shamelessly break this, so don't count on it
169 continuing to work. */
170 #define DHO_AUTHENTICATE 210
171
172 #define DHO_END 255
173
174/* DHCP message types. */
175 #define DHCPDISCOVER1
176 #define DHCPOFFER2
177 #define DHCPREQUEST3
178 #define DHCPDECLINE4
179 #define DHCPACK 5
180 #define DHCPNAK 6
181 #define DHCPRELEASE7
182 #define DHCPINFORM8
183
184/* Relay Agent Information option subtypes: */
185 #define RAI_CIRCUIT_ID1
186 #define RAI_REMOTE_ID2
187 #define RAI_AGENT_ID3
188
189/* FQDN suboptions: */
190 #define FQDN_NO_CLIENT_UPDATE 1
191 #define FQDN_SERVER_UPDATE 2
192 #define FQDN_ENCODED 3
193 #define FQDN_RCODE1 4
194 #define FQDN_RCODE2 5
195 #define FQDN_HOSTNAME 6
196 #define FQDN_DOMAINNAME 7
197 #define FQDN_FQDN 8
198 #define FQDN_SUBOPTION_COUNT 8
199
200#endif \ No newline at end of file