1: /* dhcp.h
2:
3: Protocol structures... */
4:
5: /*
6: * Copyright (c) 2011-2012 by Internet Systems Consortium, Inc. ("ISC")
7: * Copyright (c) 2004-2009 by Internet Systems Consortium, Inc. ("ISC")
8: * Copyright (c) 1995-2003 by Internet Software Consortium
9: *
10: * Permission to use, copy, modify, and distribute this software for any
11: * purpose with or without fee is hereby granted, provided that the above
12: * copyright notice and this permission notice appear in all copies.
13: *
14: * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
15: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
16: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR
17: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
18: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
19: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
20: * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
21: *
22: * Internet Systems Consortium, Inc.
23: * 950 Charter Street
24: * Redwood City, CA 94063
25: * <info@isc.org>
26: * https://www.isc.org/
27: *
28: * This software has been written for Internet Systems Consortium
29: * by Ted Lemon in cooperation with Vixie Enterprises. To learn more
30: * about Internet Systems Consortium, see ``https://www.isc.org''.
31: * To learn more about Vixie Enterprises, see ``http://www.vix.com''.
32: */
33:
34: #ifndef DHCP_H
35: #define DHCP_H
36:
37: #define DHCP_UDP_OVERHEAD (20 + /* IP header */ \
38: 8) /* UDP header */
39: #define DHCP_SNAME_LEN 64
40: #define DHCP_FILE_LEN 128
41: #define DHCP_FIXED_NON_UDP 236
42: #define DHCP_FIXED_LEN (DHCP_FIXED_NON_UDP + DHCP_UDP_OVERHEAD)
43: /* Everything but options. */
44: #define BOOTP_MIN_LEN 300
45:
46: #define DHCP_MTU_MAX 1500
47: #define DHCP_MTU_MIN 576
48:
49: #define DHCP_MAX_OPTION_LEN (DHCP_MTU_MAX - DHCP_FIXED_LEN)
50: #define DHCP_MIN_OPTION_LEN (DHCP_MTU_MIN - DHCP_FIXED_LEN)
51:
52: struct dhcp_packet {
53: u_int8_t op; /* 0: Message opcode/type */
54: u_int8_t htype; /* 1: Hardware addr type (net/if_types.h) */
55: u_int8_t hlen; /* 2: Hardware addr length */
56: u_int8_t hops; /* 3: Number of relay agent hops from client */
57: u_int32_t xid; /* 4: Transaction ID */
58: u_int16_t secs; /* 8: Seconds since client started looking */
59: u_int16_t flags; /* 10: Flag bits */
60: struct in_addr ciaddr; /* 12: Client IP address (if already in use) */
61: struct in_addr yiaddr; /* 16: Client IP address */
62: struct in_addr siaddr; /* 18: IP address of next server to talk to */
63: struct in_addr giaddr; /* 20: DHCP relay agent IP address */
64: unsigned char chaddr [16]; /* 24: Client hardware address */
65: char sname [DHCP_SNAME_LEN]; /* 40: Server name */
66: char file [DHCP_FILE_LEN]; /* 104: Boot filename */
67: unsigned char options [DHCP_MAX_OPTION_LEN];
68: /* 212: Optional parameters
69: (actual length dependent on MTU). */
70: };
71:
72: /* BOOTP (rfc951) message types */
73: #define BOOTREQUEST 1
74: #define BOOTREPLY 2
75:
76: /* Possible values for flags field... */
77: #define BOOTP_BROADCAST 32768L
78:
79: /* Possible values for hardware type (htype) field... */
80: #define HTYPE_ETHER 1 /* Ethernet 10Mbps */
81: #define HTYPE_IEEE802 6 /* IEEE 802.2 Token Ring... */
82: #define HTYPE_FDDI 8 /* FDDI... */
83: #define HTYPE_INFINIBAND 32 /* IP over Infiniband */
84: #define HTYPE_IPMP 255 /* IPMP - random hw address - there
85: * is no standard for this so we
86: * just steal a type */
87:
88: /* Magic cookie validating dhcp options field (and bootp vendor
89: extensions field). */
90: #define DHCP_OPTIONS_COOKIE "\143\202\123\143"
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_VENDOR_CLASS_IDENTIFIER 60
155: #define DHO_DHCP_CLIENT_IDENTIFIER 61
156: #define DHO_NWIP_DOMAIN_NAME 62
157: #define DHO_NWIP_SUBOPTIONS 63
158: #define DHO_USER_CLASS 77
159: #define DHO_FQDN 81
160: #define DHO_DHCP_AGENT_OPTIONS 82
161: #define DHO_AUTHENTICATE 90 /* RFC3118, was 210 */
162: #define DHO_CLIENT_LAST_TRANSACTION_TIME 91
163: #define DHO_ASSOCIATED_IP 92
164: #define DHO_SUBNET_SELECTION 118 /* RFC3011! */
165: #define DHO_DOMAIN_SEARCH 119 /* RFC3397 */
166: #define DHO_VIVCO_SUBOPTIONS 124
167: #define DHO_VIVSO_SUBOPTIONS 125
168:
169: #define DHO_END 255
170:
171: /* DHCP message types. */
172: #define DHCPDISCOVER 1
173: #define DHCPOFFER 2
174: #define DHCPREQUEST 3
175: #define DHCPDECLINE 4
176: #define DHCPACK 5
177: #define DHCPNAK 6
178: #define DHCPRELEASE 7
179: #define DHCPINFORM 8
180: #define DHCPLEASEQUERY 10
181: #define DHCPLEASEUNASSIGNED 11
182: #define DHCPLEASEUNKNOWN 12
183: #define DHCPLEASEACTIVE 13
184:
185:
186: /* Relay Agent Information option subtypes: */
187: #define RAI_CIRCUIT_ID 1
188: #define RAI_REMOTE_ID 2
189: #define RAI_AGENT_ID 3
190: #define RAI_LINK_SELECT 5
191:
192: /* FQDN suboptions: */
193: #define FQDN_NO_CLIENT_UPDATE 1
194: #define FQDN_SERVER_UPDATE 2
195: #define FQDN_ENCODED 3
196: #define FQDN_RCODE1 4
197: #define FQDN_RCODE2 5
198: #define FQDN_HOSTNAME 6
199: #define FQDN_DOMAINNAME 7
200: #define FQDN_FQDN 8
201: #define FQDN_SUBOPTION_COUNT 8
202:
203: /* Enterprise Suboptions: */
204: #define VENDOR_ISC_SUBOPTIONS 2495
205:
206: #endif /* DHCP_H */
207:
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