1: #ifndef DHCP_H_
2: #define DHCP_H_
3:
4: /* dhcp.h
5:
6: Protocol structures... */
7:
8: /*
9: * Copyright (c) 2004-2005 by Internet Systems Consortium, Inc. ("ISC")
10: * Copyright (c) 1995-2003 by Internet Software Consortium
11: *
12: * Permission to use, copy, modify, and distribute this software for any
13: * purpose with or without fee is hereby granted, provided that the above
14: * copyright notice and this permission notice appear in all copies.
15: *
16: * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
17: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
18: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR
19: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
20: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
21: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
22: * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
23: *
24: * Internet Systems Consortium, Inc.
25: * 950 Charter Street
26: * Redwood City, CA 94063
27: * <info@isc.org>
28: * http://www.isc.org/
29: *
30: * This software has been written for Internet Systems Consortium
31: * by Ted Lemon in cooperation with Vixie Enterprises. To learn more
32: * about Internet Systems Consortium, see ``http://www.isc.org''.
33: * To learn more about Vixie Enterprises, see ``http://www.vix.com''.
34: */
35:
36: #define DHCP_UDP_OVERHEAD (20 + /* IP header */ \
37: 8) /* UDP header */
38: #define DHCP_SNAME_LEN 64
39: #define DHCP_FILE_LEN 128
40: #define DHCP_FIXED_NON_UDP 236
41: #define DHCP_FIXED_LEN (DHCP_FIXED_NON_UDP + DHCP_UDP_OVERHEAD)
42: /* Everything but options. */
43: #define DHCP_MTU_MAX 1500
44: #define DHCP_OPTION_LEN (DHCP_MTU_MAX - DHCP_FIXED_LEN)
45:
46: #define BOOTP_MIN_LEN 300
47: #define DHCP_MIN_LEN 548
48:
49: struct dhcp_packet {
50: uint8_t op; /* 0: Message opcode/type */
51: uint8_t htype; /* 1: Hardware addr type (net/if_types.h) */
52: uint8_t hlen; /* 2: Hardware addr length */
53: uint8_t hops; /* 3: Number of relay agent hops from client */
54: uint32_t xid; /* 4: Transaction ID */
55: uint16_t secs; /* 8: Seconds since client started looking */
56: uint16_t flags; /* 10: Flag bits */
57: struct in_addr ciaddr; /* 12: Client IP address (if already in use) */
58: struct in_addr yiaddr; /* 16: Client IP address */
59: struct in_addr siaddr; /* 18: IP address of next server to talk to */
60: struct in_addr giaddr; /* 20: DHCP relay agent IP address */
61: unsigned char chaddr [16]; /* 24: Client hardware address */
62: char sname [DHCP_SNAME_LEN]; /* 40: Server name */
63: char file [DHCP_FILE_LEN]; /* 104: Boot filename */
64: unsigned char options [DHCP_OPTION_LEN];
65: /* 212: Optional parameters
66: (actual length dependent on MTU). */
67: };
68:
69: /* BOOTP (rfc951) message types */
70: #define BOOTREQUEST 1
71: #define BOOTREPLY 2
72:
73: /* Possible values for flags field... */
74: #define BOOTP_BROADCAST 32768L
75:
76: /* Possible values for hardware type (htype) field... */
77: #define HTYPE_ETHER 1 /* Ethernet 10Mbps */
78: #define HTYPE_IEEE802 6 /* IEEE 802.2 Token Ring... */
79: #define HTYPE_FDDI 8 /* FDDI... */
80:
81: /* Magic cookie validating dhcp options field (and bootp vendor
82: extensions field). */
83: #define DHCP_OPTIONS_COOKIE "\143\202\123\143"
84:
85: /* DHCP Option codes: */
86:
87: #define DHO_PAD 0
88: #define DHO_SUBNET_MASK 1
89: #define DHO_TIME_OFFSET 2
90: #define DHO_ROUTERS 3
91: #define DHO_TIME_SERVERS 4
92: #define DHO_NAME_SERVERS 5
93: #define DHO_DOMAIN_NAME_SERVERS 6
94: #define DHO_LOG_SERVERS 7
95: #define DHO_COOKIE_SERVERS 8
96: #define DHO_LPR_SERVERS 9
97: #define DHO_IMPRESS_SERVERS 10
98: #define DHO_RESOURCE_LOCATION_SERVERS 11
99: #define DHO_HOST_NAME 12
100: #define DHO_BOOT_SIZE 13
101: #define DHO_MERIT_DUMP 14
102: #define DHO_DOMAIN_NAME 15
103: #define DHO_SWAP_SERVER 16
104: #define DHO_ROOT_PATH 17
105: #define DHO_EXTENSIONS_PATH 18
106: #define DHO_IP_FORWARDING 19
107: #define DHO_NON_LOCAL_SOURCE_ROUTING 20
108: #define DHO_POLICY_FILTER 21
109: #define DHO_MAX_DGRAM_REASSEMBLY 22
110: #define DHO_DEFAULT_IP_TTL 23
111: #define DHO_PATH_MTU_AGING_TIMEOUT 24
112: #define DHO_PATH_MTU_PLATEAU_TABLE 25
113: #define DHO_INTERFACE_MTU 26
114: #define DHO_ALL_SUBNETS_LOCAL 27
115: #define DHO_BROADCAST_ADDRESS 28
116: #define DHO_PERFORM_MASK_DISCOVERY 29
117: #define DHO_MASK_SUPPLIER 30
118: #define DHO_ROUTER_DISCOVERY 31
119: #define DHO_ROUTER_SOLICITATION_ADDRESS 32
120: #define DHO_STATIC_ROUTES 33
121: #define DHO_TRAILER_ENCAPSULATION 34
122: #define DHO_ARP_CACHE_TIMEOUT 35
123: #define DHO_IEEE802_3_ENCAPSULATION 36
124: #define DHO_DEFAULT_TCP_TTL 37
125: #define DHO_TCP_KEEPALIVE_INTERVAL 38
126: #define DHO_TCP_KEEPALIVE_GARBAGE 39
127: #define DHO_NIS_DOMAIN 40
128: #define DHO_NIS_SERVERS 41
129: #define DHO_NTP_SERVERS 42
130: #define DHO_VENDOR_ENCAPSULATED_OPTIONS 43
131: #define DHO_NETBIOS_NAME_SERVERS 44
132: #define DHO_NETBIOS_DD_SERVER 45
133: #define DHO_NETBIOS_NODE_TYPE 46
134: #define DHO_NETBIOS_SCOPE 47
135: #define DHO_FONT_SERVERS 48
136: #define DHO_X_DISPLAY_MANAGER 49
137: #define DHO_DHCP_REQUESTED_ADDRESS 50
138: #define DHO_DHCP_LEASE_TIME 51
139: #define DHO_DHCP_OPTION_OVERLOAD 52
140: #define DHO_DHCP_MESSAGE_TYPE 53
141: #define DHO_DHCP_SERVER_IDENTIFIER 54
142: #define DHO_DHCP_PARAMETER_REQUEST_LIST 55
143: #define DHO_DHCP_MESSAGE 56
144: #define DHO_DHCP_MAX_MESSAGE_SIZE 57
145: #define DHO_DHCP_RENEWAL_TIME 58
146: #define DHO_DHCP_REBINDING_TIME 59
147: #define DHO_VENDOR_CLASS_IDENTIFIER 60
148: #define DHO_DHCP_CLIENT_IDENTIFIER 61
149: #define DHO_NWIP_DOMAIN_NAME 62
150: #define DHO_NWIP_SUBOPTIONS 63
151: #define DHO_USER_CLASS 77
152: #define DHO_FQDN 81
153: #define DHO_DHCP_AGENT_OPTIONS 82
154: #define DHO_SUBNET_SELECTION 118 /* RFC3011! */
155: /* The DHO_AUTHENTICATE option is not a standard yet, so I've
156: allocated an option out of the "local" option space for it on a
157: temporary basis. Once an option code number is assigned, I will
158: immediately and shamelessly break this, so don't count on it
159: continuing to work. */
160: #define DHO_AUTHENTICATE 210
161:
162: #define DHO_END 255
163:
164: /* DHCP message types. */
165: #define DHCPDISCOVER 1
166: #define DHCPOFFER 2
167: #define DHCPREQUEST 3
168: #define DHCPDECLINE 4
169: #define DHCPACK 5
170: #define DHCPNAK 6
171: #define DHCPRELEASE 7
172: #define DHCPINFORM 8
173:
174: #ifndef _WIN32
175:
176: /* Relay Agent Information option subtypes: */
177: #define RAI_CIRCUIT_ID 1
178: #define RAI_REMOTE_ID 2
179: #define RAI_AGENT_ID 3
180:
181: /* FQDN suboptions: */
182: #define FQDN_NO_CLIENT_UPDATE 1
183: #define FQDN_SERVER_UPDATE 2
184: #define FQDN_ENCODED 3
185: #define FQDN_RCODE1 4
186: #define FQDN_RCODE2 5
187: #define FQDN_HOSTNAME 6
188: #define FQDN_DOMAINNAME 7
189: #define FQDN_FQDN 8
190: #define FQDN_SUBOPTION_COUNT 8
191:
192: #endif
193:
194: #endif /* #ifndef DHCP_H_ */
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