3 Protocol structures... */
6 * Copyright (c) 2004-2009 by Internet Systems Consortium, Inc. ("ISC")
7 * Copyright (c) 1995-2003 by Internet Software Consortium
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19 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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27 * This software has been written for Internet Systems Consortium
28 * by Ted Lemon in cooperation with Vixie Enterprises. To learn more
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36 #define DHCP_UDP_OVERHEAD (20 + /* IP 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 BOOTP_MIN_LEN 300
45 #define DHCP_MTU_MAX 1500
46 #define DHCP_MTU_MIN 576
48 #define DHCP_MAX_OPTION_LEN (DHCP_MTU_MAX - DHCP_FIXED_LEN)
49 #define DHCP_MIN_OPTION_LEN (DHCP_MTU_MIN - DHCP_FIXED_LEN)
52 u_int8_t op; /* 0: Message opcode/type */
53 u_int8_t htype; /* 1: Hardware addr type (net/if_types.h) */
54 u_int8_t hlen; /* 2: Hardware addr length */
55 u_int8_t hops; /* 3: Number of relay agent hops from client */
56 u_int32_t xid; /* 4: Transaction ID */
57 u_int16_t secs; /* 8: Seconds since client started looking */
58 u_int16_t flags; /* 10: Flag bits */
59 struct in_addr ciaddr; /* 12: Client IP address (if already in use) */
60 struct in_addr yiaddr; /* 16: Client IP address */
61 struct in_addr siaddr; /* 18: IP address of next server to talk to */
62 struct in_addr giaddr; /* 20: DHCP relay agent IP address */
63 unsigned char chaddr [16]; /* 24: Client hardware address */
64 char sname [DHCP_SNAME_LEN]; /* 40: Server name */
65 char file [DHCP_FILE_LEN]; /* 104: Boot filename */
66 unsigned char options [DHCP_MAX_OPTION_LEN];
67 /* 212: Optional parameters
68 (actual length dependent on MTU). */
71 /* BOOTP (rfc951) message types */
75 /* Possible values for flags field... */
76 #define BOOTP_BROADCAST 32768L
78 /* Possible values for hardware type (htype) field... */
79 #define HTYPE_ETHER 1 /* Ethernet 10Mbps */
80 #define HTYPE_IEEE802 6 /* IEEE 802.2 Token Ring... */
81 #define HTYPE_FDDI 8 /* FDDI... */
83 /* Magic cookie validating dhcp options field (and bootp vendor
85 #define DHCP_OPTIONS_COOKIE "\143\202\123\143"
87 /* DHCP Option codes: */
90 #define DHO_SUBNET_MASK 1
91 #define DHO_TIME_OFFSET 2
93 #define DHO_TIME_SERVERS 4
94 #define DHO_NAME_SERVERS 5
95 #define DHO_DOMAIN_NAME_SERVERS 6
96 #define DHO_LOG_SERVERS 7
97 #define DHO_COOKIE_SERVERS 8
98 #define DHO_LPR_SERVERS 9
99 #define DHO_IMPRESS_SERVERS 10
100 #define DHO_RESOURCE_LOCATION_SERVERS 11
101 #define DHO_HOST_NAME 12
102 #define DHO_BOOT_SIZE 13
103 #define DHO_MERIT_DUMP 14
104 #define DHO_DOMAIN_NAME 15
105 #define DHO_SWAP_SERVER 16
106 #define DHO_ROOT_PATH 17
107 #define DHO_EXTENSIONS_PATH 18
108 #define DHO_IP_FORWARDING 19
109 #define DHO_NON_LOCAL_SOURCE_ROUTING 20
110 #define DHO_POLICY_FILTER 21
111 #define DHO_MAX_DGRAM_REASSEMBLY 22
112 #define DHO_DEFAULT_IP_TTL 23
113 #define DHO_PATH_MTU_AGING_TIMEOUT 24
114 #define DHO_PATH_MTU_PLATEAU_TABLE 25
115 #define DHO_INTERFACE_MTU 26
116 #define DHO_ALL_SUBNETS_LOCAL 27
117 #define DHO_BROADCAST_ADDRESS 28
118 #define DHO_PERFORM_MASK_DISCOVERY 29
119 #define DHO_MASK_SUPPLIER 30
120 #define DHO_ROUTER_DISCOVERY 31
121 #define DHO_ROUTER_SOLICITATION_ADDRESS 32
122 #define DHO_STATIC_ROUTES 33
123 #define DHO_TRAILER_ENCAPSULATION 34
124 #define DHO_ARP_CACHE_TIMEOUT 35
125 #define DHO_IEEE802_3_ENCAPSULATION 36
126 #define DHO_DEFAULT_TCP_TTL 37
127 #define DHO_TCP_KEEPALIVE_INTERVAL 38
128 #define DHO_TCP_KEEPALIVE_GARBAGE 39
129 #define DHO_NIS_DOMAIN 40
130 #define DHO_NIS_SERVERS 41
131 #define DHO_NTP_SERVERS 42
132 #define DHO_VENDOR_ENCAPSULATED_OPTIONS 43
133 #define DHO_NETBIOS_NAME_SERVERS 44
134 #define DHO_NETBIOS_DD_SERVER 45
135 #define DHO_NETBIOS_NODE_TYPE 46
136 #define DHO_NETBIOS_SCOPE 47
137 #define DHO_FONT_SERVERS 48
138 #define DHO_X_DISPLAY_MANAGER 49
139 #define DHO_DHCP_REQUESTED_ADDRESS 50
140 #define DHO_DHCP_LEASE_TIME 51
141 #define DHO_DHCP_OPTION_OVERLOAD 52
142 #define DHO_DHCP_MESSAGE_TYPE 53
143 #define DHO_DHCP_SERVER_IDENTIFIER 54
144 #define DHO_DHCP_PARAMETER_REQUEST_LIST 55
145 #define DHO_DHCP_MESSAGE 56
146 #define DHO_DHCP_MAX_MESSAGE_SIZE 57
147 #define DHO_DHCP_RENEWAL_TIME 58
148 #define DHO_DHCP_REBINDING_TIME 59
149 #define DHO_VENDOR_CLASS_IDENTIFIER 60
150 #define DHO_DHCP_CLIENT_IDENTIFIER 61
151 #define DHO_NWIP_DOMAIN_NAME 62
152 #define DHO_NWIP_SUBOPTIONS 63
153 #define DHO_USER_CLASS 77
155 #define DHO_DHCP_AGENT_OPTIONS 82
156 #define DHO_AUTHENTICATE 90 /* RFC3118, was 210 */
157 #define DHO_CLIENT_LAST_TRANSACTION_TIME 91
158 #define DHO_ASSOCIATED_IP 92
159 #define DHO_SUBNET_SELECTION 118 /* RFC3011! */
160 #define DHO_DOMAIN_SEARCH 119 /* RFC3397 */
161 #define DHO_VIVCO_SUBOPTIONS 124
162 #define DHO_VIVSO_SUBOPTIONS 125
166 /* DHCP message types. */
167 #define DHCPDISCOVER 1
169 #define DHCPREQUEST 3
170 #define DHCPDECLINE 4
173 #define DHCPRELEASE 7
175 #define DHCPLEASEQUERY 10
176 #define DHCPLEASEUNASSIGNED 11
177 #define DHCPLEASEUNKNOWN 12
178 #define DHCPLEASEACTIVE 13
181 /* Relay Agent Information option subtypes: */
182 #define RAI_CIRCUIT_ID 1
183 #define RAI_REMOTE_ID 2
184 #define RAI_AGENT_ID 3
185 #define RAI_LINK_SELECT 5
187 /* FQDN suboptions: */
188 #define FQDN_NO_CLIENT_UPDATE 1
189 #define FQDN_SERVER_UPDATE 2
190 #define FQDN_ENCODED 3
191 #define FQDN_RCODE1 4
192 #define FQDN_RCODE2 5
193 #define FQDN_HOSTNAME 6
194 #define FQDN_DOMAINNAME 7
196 #define FQDN_SUBOPTION_COUNT 8
198 /* Enterprise Suboptions: */
199 #define VENDOR_ISC_SUBOPTIONS 2495