/* $OpenBSD: dhcp.h,v 1.6 2016/12/12 15:41:05 rzalamena Exp $ */ /* Protocol structures... */ /* * Copyright (c) 1995, 1996 The Internet Software Consortium. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of The Internet Software Consortium nor the names * of its contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE INTERNET SOFTWARE CONSORTIUM AND * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE INTERNET SOFTWARE CONSORTIUM OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * This software has been written for the Internet Software Consortium * by Ted Lemon <mellon@fugue.com> in cooperation with Vixie * Enterprises. To learn more about the Internet Software Consortium, * see ``http://www.vix.com/isc''. To learn more about Vixie * Enterprises, see ``http://www.vix.com''. */ #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 DHCP_MTU_MAX 1500 #define DHCP_OPTION_LEN (DHCP_MTU_MAX - DHCP_FIXED_LEN) /* The option/sub-option maximum length. */ #define DHCP_OPTION_MAXLEN 255 /* The option/sub-option header length. */ #define DHCP_OPTION_HDR_LEN 2 #define BOOTP_MIN_LEN 300 struct dhcp_packet { u_int8_t op; /* Message opcode/type */ u_int8_t htype; /* Hardware addr type (see net/if_types.h) */ u_int8_t hlen; /* Hardware addr length */ u_int8_t hops; /* Number of relay agent hops from client */ u_int32_t xid; /* Transaction ID */ u_int16_t secs; /* Seconds since client started looking */ u_int16_t flags; /* Flag bits */ struct in_addr ciaddr; /* Client IP address (if already in use) */ struct in_addr yiaddr; /* Client IP address */ struct in_addr siaddr; /* IP address of next server to talk to */ struct in_addr giaddr; /* DHCP relay agent IP address */ unsigned char chaddr[16]; /* Client hardware address */ char sname[DHCP_SNAME_LEN]; /* Server name */ char file[DHCP_FILE_LEN]; /* Boot filename */ unsigned char options[DHCP_OPTION_LEN]; /* 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 */ #define HTYPE_IEEE802 6 /* IEEE 802.2 Token Ring... */ #define HTYPE_FDDI 8 /* FDDI... */ #define HTYPE_IPSEC_TUNNEL 31 /* IPsec Tunnel (RFC3456) */ /* Magic cookie validating dhcp options field (and bootp vendor extensions field). */ #define DHCP_OPTIONS_COOKIE "\143\202\123\143" #define DHCP_OPTIONS_COOKIE_LEN 4 /* 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_DHCP_CLASS_IDENTIFIER 60 #define DHO_DHCP_CLIENT_IDENTIFIER 61 #define DHO_DHCP_USER_CLASS_ID 77 #define DHO_RELAY_AGENT_INFORMATION 82 #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 /* Relay Agent Information sub-options */ #define RAI_CIRCUIT_ID 1 #define RAI_REMOTE_ID 2 #define RAI_AGENT_ID 3
