/* $NetBSD: dhcp.h,v 1.2.6.1 2024/02/29 11:39:19 martin Exp $ */ /* dhcp.h Protocol structures... */ /* * Copyright (C) 2004-2022 Internet Systems Consortium, Inc. ("ISC") * Copyright (c) 1995-2003 by Internet Software Consortium * * This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, You can obtain one at http://mozilla.org/MPL/2.0/. * * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. * * Internet Systems Consortium, Inc. * PO Box 360 * Newmarket, NH 03857 USA * * https://www.isc.org/ * */ #ifndef DHCP_H #define DHCP_H #define DHCP_UDP_OVERHEAD (20 + /* IP header */ \ 8) /* UDP header */ #define DHCP_SNAME_LEN 64 #define DHCP_FILE_LEN 128 #define DHCP_FIXED_NON_UDP 236 #define DHCP_FIXED_LEN (DHCP_FIXED_NON_UDP + DHCP_UDP_OVERHEAD) /* Everything but options. */ #define BOOTP_MIN_LEN 300 #define DHCP_MTU_MAX 1500 #define DHCP_MTU_MIN 576 #define DHCP_MAX_OPTION_LEN (DHCP_MTU_MAX - DHCP_FIXED_LEN) #define DHCP_MIN_OPTION_LEN (DHCP_MTU_MIN - DHCP_FIXED_LEN) struct dhcp_packet { u_int8_t op; /* 0: Message opcode/type */ u_int8_t htype; /* 1: Hardware addr type (net/if_types.h) */ u_int8_t hlen; /* 2: Hardware addr length */ u_int8_t hops; /* 3: Number of relay agent hops from client */ u_int32_t xid; /* 4: Transaction ID */ u_int16_t secs; /* 8: Seconds since client started looking */ u_int16_t flags; /* 10: Flag bits */ struct in_addr ciaddr; /* 12: Client IP address (if already in use) */ struct in_addr yiaddr; /* 16: Client IP address */ struct in_addr siaddr; /* 18: IP address of next server to talk to */ struct in_addr giaddr; /* 20: DHCP relay agent IP address */ unsigned char chaddr [16]; /* 24: Client hardware address */ char sname [DHCP_SNAME_LEN]; /* 40: Server name */ char file [DHCP_FILE_LEN]; /* 104: Boot filename */ unsigned char options [DHCP_MAX_OPTION_LEN]; /* 212: Optional parameters (actual length dependent on MTU). */ }; /* BOOTP (rfc951) message types */ #define BOOTREQUEST 1 #define BOOTREPLY 2 /* Possible values for flags field... */ #define BOOTP_BROADCAST 32768L /* Possible values for hardware type (htype) field... */ #define HTYPE_ETHER 1 /* Ethernet 10Mbps */ #define HTYPE_IEEE802 6 /* IEEE 802.2 Token Ring... */ #define HTYPE_FDDI 8 /* FDDI... */ #define HTYPE_INFINIBAND 32 /* IP over Infiniband */ #define HTYPE_IPMP 255 /* IPMP - random hw address - there * is no standard for this so we * just steal a type */ /* Magic cookie validating dhcp options field (and bootp vendor extensions field). */ #define DHCP_OPTIONS_COOKIE "\143\202\123\143" /* DHCP Option codes: */ #define DHO_PAD 0 #define DHO_SUBNET_MASK 1 #define DHO_TIME_OFFSET 2 #define DHO_ROUTERS 3 #define DHO_TIME_SERVERS 4 #define DHO_NAME_SERVERS 5 #define DHO_DOMAIN_NAME_SERVERS 6 #define DHO_LOG_SERVERS 7 #define DHO_COOKIE_SERVERS 8 #define DHO_LPR_SERVERS 9 #define DHO_IMPRESS_SERVERS 10 #define DHO_RESOURCE_LOCATION_SERVERS 11 #define DHO_HOST_NAME 12 #define DHO_BOOT_SIZE 13 #define DHO_MERIT_DUMP 14 #define DHO_DOMAIN_NAME 15 #define DHO_SWAP_SERVER 16 #define DHO_ROOT_PATH 17 #define DHO_EXTENSIONS_PATH 18 #define DHO_IP_FORWARDING 19 #define DHO_NON_LOCAL_SOURCE_ROUTING 20 #define DHO_POLICY_FILTER 21 #define DHO_MAX_DGRAM_REASSEMBLY 22 #define DHO_DEFAULT_IP_TTL 23 #define DHO_PATH_MTU_AGING_TIMEOUT 24 #define DHO_PATH_MTU_PLATEAU_TABLE 25 #define DHO_INTERFACE_MTU 26 #define DHO_ALL_SUBNETS_LOCAL 27 #define DHO_BROADCAST_ADDRESS 28 #define DHO_PERFORM_MASK_DISCOVERY 29 #define DHO_MASK_SUPPLIER 30 #define DHO_ROUTER_DISCOVERY 31 #define DHO_ROUTER_SOLICITATION_ADDRESS 32 #define DHO_STATIC_ROUTES 33 #define DHO_TRAILER_ENCAPSULATION 34 #define DHO_ARP_CACHE_TIMEOUT 35 #define DHO_IEEE802_3_ENCAPSULATION 36 #define DHO_DEFAULT_TCP_TTL 37 #define DHO_TCP_KEEPALIVE_INTERVAL 38 #define DHO_TCP_KEEPALIVE_GARBAGE 39 #define DHO_NIS_DOMAIN 40 #define DHO_NIS_SERVERS 41 #define DHO_NTP_SERVERS 42 #define DHO_VENDOR_ENCAPSULATED_OPTIONS 43 #define DHO_NETBIOS_NAME_SERVERS 44 #define DHO_NETBIOS_DD_SERVER 45 #define DHO_NETBIOS_NODE_TYPE 46 #define DHO_NETBIOS_SCOPE 47 #define DHO_FONT_SERVERS 48 #define DHO_X_DISPLAY_MANAGER 49 #define DHO_DHCP_REQUESTED_ADDRESS 50 #define DHO_DHCP_LEASE_TIME 51 #define DHO_DHCP_OPTION_OVERLOAD 52 #define DHO_DHCP_MESSAGE_TYPE 53 #define DHO_DHCP_SERVER_IDENTIFIER 54 #define DHO_DHCP_PARAMETER_REQUEST_LIST 55 #define DHO_DHCP_MESSAGE 56 #define DHO_DHCP_MAX_MESSAGE_SIZE 57 #define DHO_DHCP_RENEWAL_TIME 58 #define DHO_DHCP_REBINDING_TIME 59 #define DHO_VENDOR_CLASS_IDENTIFIER 60 #define DHO_DHCP_CLIENT_IDENTIFIER 61 #define DHO_NWIP_DOMAIN_NAME 62 #define DHO_NWIP_SUBOPTIONS 63 #define DHO_USER_CLASS 77 #define DHO_FQDN 81 #define DHO_DHCP_AGENT_OPTIONS 82 #define DHO_AUTHENTICATE 90 /* RFC3118, was 210 */ #define DHO_CLIENT_LAST_TRANSACTION_TIME 91 #define DHO_ASSOCIATED_IP 92 #define DHO_V6_ONLY_PREFERRED 108 /* RFC8925 */ #define DHO_SUBNET_SELECTION 118 /* RFC3011! */ #define DHO_DOMAIN_SEARCH 119 /* RFC3397 */ #define DHO_VIVCO_SUBOPTIONS 124 #define DHO_VIVSO_SUBOPTIONS 125 #define DHO_END 255 /* DHCP message types. */ #define DHCPDISCOVER 1 #define DHCPOFFER 2 #define DHCPREQUEST 3 #define DHCPDECLINE 4 #define DHCPACK 5 #define DHCPNAK 6 #define DHCPRELEASE 7 #define DHCPINFORM 8 #define DHCPLEASEQUERY 10 #define DHCPLEASEUNASSIGNED 11 #define DHCPLEASEUNKNOWN 12 #define DHCPLEASEACTIVE 13 /* Relay Agent Information option subtypes: */ #define RAI_CIRCUIT_ID 1 #define RAI_REMOTE_ID 2 #define RAI_AGENT_ID 3 #define RAI_LINK_SELECT 5 /* not yet assigned but next free value */ #define RAI_RELAY_PORT 19 /* FQDN suboptions: */ #define FQDN_NO_CLIENT_UPDATE 1 #define FQDN_SERVER_UPDATE 2 #define FQDN_ENCODED 3 #define FQDN_RCODE1 4 #define FQDN_RCODE2 5 #define FQDN_HOSTNAME 6 #define FQDN_DOMAINNAME 7 #define FQDN_FQDN 8 #define FQDN_SUBOPTION_COUNT 8 /* Enterprise Suboptions: */ #define VENDOR_ISC_SUBOPTIONS 2495 #endif /* DHCP_H */