3
4/* Protocol structures... */
5
6/*
7 * Copyright (c) 1995, 1996 The Internet Software Consortium.
8 * All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of The Internet Software Consortium nor the names
20 * of its contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE INTERNET SOFTWARE CONSORTIUM AND
24 * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
25 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
26 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
27 * DISCLAIMED. IN NO EVENT SHALL THE INTERNET SOFTWARE CONSORTIUM OR
28 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
29 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
30 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
31 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
32 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
33 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
34 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 *
37 * This software has been written for the Internet Software Consortium
38 * by Ted Lemon <mellon@fugue.com> in cooperation with Vixie
39 * Enterprises. To learn more about the Internet Software Consortium,
40 * see ``http://www.vix.com/isc''. To learn more about Vixie
41 * Enterprises, see ``http://www.vix.com''.
42 */
43
44#define DHCP_UDP_OVERHEAD (14 + /* Ethernet header */ \
45 20 + /* IP header */ \
46 8) /* UDP header */
47#define DHCP_SNAME_LEN 64
48#define DHCP_FILE_LEN 128
49#define DHCP_FIXED_NON_UDP 236
50#define DHCP_FIXED_LEN (DHCP_FIXED_NON_UDP + DHCP_UDP_OVERHEAD)
51 /* Everything but options. */
52#define DHCP_MTU_MAX 1500
53#define DHCP_OPTION_LEN (DHCP_MTU_MAX - DHCP_FIXED_LEN)
54
55#define BOOTP_MIN_LEN 300
56#define DHCP_MIN_LEN 548
57
58struct dhcp_packet {
59 u_int8_t op; /* Message opcode/type */
60 u_int8_t htype; /* Hardware addr type (see net/if_types.h) */
61 u_int8_t hlen; /* Hardware addr length */
62 u_int8_t hops; /* Number of relay agent hops from client */
63 u_int32_t xid; /* Transaction ID */
64 u_int16_t secs; /* Seconds since client started looking */
65 u_int16_t flags; /* Flag bits */
66 struct in_addr ciaddr; /* Client IP address (if already in use) */
67 struct in_addr yiaddr; /* Client IP address */
68 struct in_addr siaddr; /* IP address of next server to talk to */
69 struct in_addr giaddr; /* DHCP relay agent IP address */
70 unsigned char chaddr[16]; /* Client hardware address */
71 char sname[DHCP_SNAME_LEN]; /* Server name */
72 char file[DHCP_FILE_LEN]; /* Boot filename */
73 unsigned char options[DHCP_OPTION_LEN];
74 /* Optional parameters
75 (actual length dependent on MTU). */
76};
77
78/* BOOTP (rfc951) message types */
79#define BOOTREQUEST 1
80#define BOOTREPLY 2
81
82/* Possible values for flags field... */
83#define BOOTP_BROADCAST 32768L
84
85/* Possible values for hardware type (htype) field... */
86#define HTYPE_ETHER 1 /* Ethernet */
87#define HTYPE_IEEE802 6 /* IEEE 802.2 Token Ring... */
88#define HTYPE_FDDI 8 /* FDDI... */
89
90/* Magic cookie validating dhcp options field (and bootp vendor
91 extensions field). */
92#define DHCP_OPTIONS_COOKIE "\143\202\123\143"
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_NISPLUS_DOMAIN 64
159#define DHO_NISPLUS_SERVERS 65
160#define DHO_TFTP_SERVER_NAME 66
161#define DHO_BOOTFILE_NAME 67
162#define DHO_MOBILE_IP_HOME_AGENT 68
163#define DHO_SMTP_SERVER 69
164#define DHO_POP_SERVER 70
165#define DHO_NNTP_SERVER 71
166#define DHO_WWW_SERVER 72
167#define DHO_FINGER_SERVER 73
168#define DHO_IRC_SERVER 74
169#define DHO_STREETTALK_SERVER 75
170#define DHO_STREETTALK_DA_SERVER 76
171#define DHO_DHCP_USER_CLASS_ID 77
| 3
4/* Protocol structures... */
5
6/*
7 * Copyright (c) 1995, 1996 The Internet Software Consortium.
8 * All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of The Internet Software Consortium nor the names
20 * of its contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE INTERNET SOFTWARE CONSORTIUM AND
24 * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
25 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
26 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
27 * DISCLAIMED. IN NO EVENT SHALL THE INTERNET SOFTWARE CONSORTIUM OR
28 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
29 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
30 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
31 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
32 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
33 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
34 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 *
37 * This software has been written for the Internet Software Consortium
38 * by Ted Lemon <mellon@fugue.com> in cooperation with Vixie
39 * Enterprises. To learn more about the Internet Software Consortium,
40 * see ``http://www.vix.com/isc''. To learn more about Vixie
41 * Enterprises, see ``http://www.vix.com''.
42 */
43
44#define DHCP_UDP_OVERHEAD (14 + /* Ethernet header */ \
45 20 + /* IP header */ \
46 8) /* UDP header */
47#define DHCP_SNAME_LEN 64
48#define DHCP_FILE_LEN 128
49#define DHCP_FIXED_NON_UDP 236
50#define DHCP_FIXED_LEN (DHCP_FIXED_NON_UDP + DHCP_UDP_OVERHEAD)
51 /* Everything but options. */
52#define DHCP_MTU_MAX 1500
53#define DHCP_OPTION_LEN (DHCP_MTU_MAX - DHCP_FIXED_LEN)
54
55#define BOOTP_MIN_LEN 300
56#define DHCP_MIN_LEN 548
57
58struct dhcp_packet {
59 u_int8_t op; /* Message opcode/type */
60 u_int8_t htype; /* Hardware addr type (see net/if_types.h) */
61 u_int8_t hlen; /* Hardware addr length */
62 u_int8_t hops; /* Number of relay agent hops from client */
63 u_int32_t xid; /* Transaction ID */
64 u_int16_t secs; /* Seconds since client started looking */
65 u_int16_t flags; /* Flag bits */
66 struct in_addr ciaddr; /* Client IP address (if already in use) */
67 struct in_addr yiaddr; /* Client IP address */
68 struct in_addr siaddr; /* IP address of next server to talk to */
69 struct in_addr giaddr; /* DHCP relay agent IP address */
70 unsigned char chaddr[16]; /* Client hardware address */
71 char sname[DHCP_SNAME_LEN]; /* Server name */
72 char file[DHCP_FILE_LEN]; /* Boot filename */
73 unsigned char options[DHCP_OPTION_LEN];
74 /* Optional parameters
75 (actual length dependent on MTU). */
76};
77
78/* BOOTP (rfc951) message types */
79#define BOOTREQUEST 1
80#define BOOTREPLY 2
81
82/* Possible values for flags field... */
83#define BOOTP_BROADCAST 32768L
84
85/* Possible values for hardware type (htype) field... */
86#define HTYPE_ETHER 1 /* Ethernet */
87#define HTYPE_IEEE802 6 /* IEEE 802.2 Token Ring... */
88#define HTYPE_FDDI 8 /* FDDI... */
89
90/* Magic cookie validating dhcp options field (and bootp vendor
91 extensions field). */
92#define DHCP_OPTIONS_COOKIE "\143\202\123\143"
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_NISPLUS_DOMAIN 64
159#define DHO_NISPLUS_SERVERS 65
160#define DHO_TFTP_SERVER_NAME 66
161#define DHO_BOOTFILE_NAME 67
162#define DHO_MOBILE_IP_HOME_AGENT 68
163#define DHO_SMTP_SERVER 69
164#define DHO_POP_SERVER 70
165#define DHO_NNTP_SERVER 71
166#define DHO_WWW_SERVER 72
167#define DHO_FINGER_SERVER 73
168#define DHO_IRC_SERVER 74
169#define DHO_STREETTALK_SERVER 75
170#define DHO_STREETTALK_DA_SERVER 76
171#define DHO_DHCP_USER_CLASS_ID 77
|