1147072Sbrooks/* $OpenBSD: dhcp.h,v 1.5 2004/05/04 15:49:49 deraadt Exp $ */ 2147689Sbrooks/* $FreeBSD$ */ 3147072Sbrooks 4147072Sbrooks/* Protocol structures... */ 5147072Sbrooks 6147072Sbrooks/* 7147072Sbrooks * Copyright (c) 1995, 1996 The Internet Software Consortium. 8147072Sbrooks * All rights reserved. 9147072Sbrooks * 10147072Sbrooks * Redistribution and use in source and binary forms, with or without 11147072Sbrooks * modification, are permitted provided that the following conditions 12147072Sbrooks * are met: 13147072Sbrooks * 14147072Sbrooks * 1. Redistributions of source code must retain the above copyright 15147072Sbrooks * notice, this list of conditions and the following disclaimer. 16147072Sbrooks * 2. Redistributions in binary form must reproduce the above copyright 17147072Sbrooks * notice, this list of conditions and the following disclaimer in the 18147072Sbrooks * documentation and/or other materials provided with the distribution. 19147072Sbrooks * 3. Neither the name of The Internet Software Consortium nor the names 20147072Sbrooks * of its contributors may be used to endorse or promote products derived 21147072Sbrooks * from this software without specific prior written permission. 22147072Sbrooks * 23147072Sbrooks * THIS SOFTWARE IS PROVIDED BY THE INTERNET SOFTWARE CONSORTIUM AND 24147072Sbrooks * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, 25147072Sbrooks * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 26147072Sbrooks * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 27147072Sbrooks * DISCLAIMED. IN NO EVENT SHALL THE INTERNET SOFTWARE CONSORTIUM OR 28147072Sbrooks * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 29147072Sbrooks * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 30147072Sbrooks * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 31147072Sbrooks * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 32147072Sbrooks * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 33147072Sbrooks * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 34147072Sbrooks * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35147072Sbrooks * SUCH DAMAGE. 36147072Sbrooks * 37147072Sbrooks * This software has been written for the Internet Software Consortium 38147072Sbrooks * by Ted Lemon <mellon@fugue.com> in cooperation with Vixie 39147072Sbrooks * Enterprises. To learn more about the Internet Software Consortium, 40147072Sbrooks * see ``http://www.vix.com/isc''. To learn more about Vixie 41147072Sbrooks * Enterprises, see ``http://www.vix.com''. 42147072Sbrooks */ 43147072Sbrooks 44147072Sbrooks#define DHCP_UDP_OVERHEAD (14 + /* Ethernet header */ \ 45147072Sbrooks 20 + /* IP header */ \ 46147072Sbrooks 8) /* UDP header */ 47147072Sbrooks#define DHCP_SNAME_LEN 64 48147072Sbrooks#define DHCP_FILE_LEN 128 49147072Sbrooks#define DHCP_FIXED_NON_UDP 236 50147072Sbrooks#define DHCP_FIXED_LEN (DHCP_FIXED_NON_UDP + DHCP_UDP_OVERHEAD) 51147072Sbrooks /* Everything but options. */ 52147072Sbrooks#define DHCP_MTU_MAX 1500 53147072Sbrooks#define DHCP_OPTION_LEN (DHCP_MTU_MAX - DHCP_FIXED_LEN) 54147072Sbrooks 55147072Sbrooks#define BOOTP_MIN_LEN 300 56147072Sbrooks#define DHCP_MIN_LEN 548 57147072Sbrooks 58147072Sbrooksstruct dhcp_packet { 59147072Sbrooks u_int8_t op; /* Message opcode/type */ 60147072Sbrooks u_int8_t htype; /* Hardware addr type (see net/if_types.h) */ 61147072Sbrooks u_int8_t hlen; /* Hardware addr length */ 62147072Sbrooks u_int8_t hops; /* Number of relay agent hops from client */ 63147072Sbrooks u_int32_t xid; /* Transaction ID */ 64147072Sbrooks u_int16_t secs; /* Seconds since client started looking */ 65147072Sbrooks u_int16_t flags; /* Flag bits */ 66147072Sbrooks struct in_addr ciaddr; /* Client IP address (if already in use) */ 67147072Sbrooks struct in_addr yiaddr; /* Client IP address */ 68147072Sbrooks struct in_addr siaddr; /* IP address of next server to talk to */ 69147072Sbrooks struct in_addr giaddr; /* DHCP relay agent IP address */ 70147072Sbrooks unsigned char chaddr[16]; /* Client hardware address */ 71147072Sbrooks char sname[DHCP_SNAME_LEN]; /* Server name */ 72147072Sbrooks char file[DHCP_FILE_LEN]; /* Boot filename */ 73147072Sbrooks unsigned char options[DHCP_OPTION_LEN]; 74147072Sbrooks /* Optional parameters 75147072Sbrooks (actual length dependent on MTU). */ 76147072Sbrooks}; 77147072Sbrooks 78147072Sbrooks/* BOOTP (rfc951) message types */ 79147072Sbrooks#define BOOTREQUEST 1 80147072Sbrooks#define BOOTREPLY 2 81147072Sbrooks 82147072Sbrooks/* Possible values for flags field... */ 83147072Sbrooks#define BOOTP_BROADCAST 32768L 84147072Sbrooks 85147072Sbrooks/* Possible values for hardware type (htype) field... */ 86147072Sbrooks#define HTYPE_ETHER 1 /* Ethernet */ 87147072Sbrooks#define HTYPE_IEEE802 6 /* IEEE 802.2 Token Ring... */ 88147072Sbrooks#define HTYPE_FDDI 8 /* FDDI... */ 89147072Sbrooks 90147072Sbrooks/* Magic cookie validating dhcp options field (and bootp vendor 91147072Sbrooks extensions field). */ 92147072Sbrooks#define DHCP_OPTIONS_COOKIE "\143\202\123\143" 93147072Sbrooks 94147072Sbrooks/* DHCP Option codes: */ 95147072Sbrooks 96147072Sbrooks#define DHO_PAD 0 97147072Sbrooks#define DHO_SUBNET_MASK 1 98147072Sbrooks#define DHO_TIME_OFFSET 2 99147072Sbrooks#define DHO_ROUTERS 3 100147072Sbrooks#define DHO_TIME_SERVERS 4 101147072Sbrooks#define DHO_NAME_SERVERS 5 102147072Sbrooks#define DHO_DOMAIN_NAME_SERVERS 6 103147072Sbrooks#define DHO_LOG_SERVERS 7 104147072Sbrooks#define DHO_COOKIE_SERVERS 8 105147072Sbrooks#define DHO_LPR_SERVERS 9 106147072Sbrooks#define DHO_IMPRESS_SERVERS 10 107147072Sbrooks#define DHO_RESOURCE_LOCATION_SERVERS 11 108147072Sbrooks#define DHO_HOST_NAME 12 109147072Sbrooks#define DHO_BOOT_SIZE 13 110147072Sbrooks#define DHO_MERIT_DUMP 14 111147072Sbrooks#define DHO_DOMAIN_NAME 15 112147072Sbrooks#define DHO_SWAP_SERVER 16 113147072Sbrooks#define DHO_ROOT_PATH 17 114147072Sbrooks#define DHO_EXTENSIONS_PATH 18 115147072Sbrooks#define DHO_IP_FORWARDING 19 116147072Sbrooks#define DHO_NON_LOCAL_SOURCE_ROUTING 20 117147072Sbrooks#define DHO_POLICY_FILTER 21 118147072Sbrooks#define DHO_MAX_DGRAM_REASSEMBLY 22 119147072Sbrooks#define DHO_DEFAULT_IP_TTL 23 120147072Sbrooks#define DHO_PATH_MTU_AGING_TIMEOUT 24 121147072Sbrooks#define DHO_PATH_MTU_PLATEAU_TABLE 25 122147072Sbrooks#define DHO_INTERFACE_MTU 26 123147072Sbrooks#define DHO_ALL_SUBNETS_LOCAL 27 124147072Sbrooks#define DHO_BROADCAST_ADDRESS 28 125147072Sbrooks#define DHO_PERFORM_MASK_DISCOVERY 29 126147072Sbrooks#define DHO_MASK_SUPPLIER 30 127147072Sbrooks#define DHO_ROUTER_DISCOVERY 31 128147072Sbrooks#define DHO_ROUTER_SOLICITATION_ADDRESS 32 129147072Sbrooks#define DHO_STATIC_ROUTES 33 130147072Sbrooks#define DHO_TRAILER_ENCAPSULATION 34 131147072Sbrooks#define DHO_ARP_CACHE_TIMEOUT 35 132147072Sbrooks#define DHO_IEEE802_3_ENCAPSULATION 36 133147072Sbrooks#define DHO_DEFAULT_TCP_TTL 37 134147072Sbrooks#define DHO_TCP_KEEPALIVE_INTERVAL 38 135147072Sbrooks#define DHO_TCP_KEEPALIVE_GARBAGE 39 136147072Sbrooks#define DHO_NIS_DOMAIN 40 137147072Sbrooks#define DHO_NIS_SERVERS 41 138147072Sbrooks#define DHO_NTP_SERVERS 42 139147072Sbrooks#define DHO_VENDOR_ENCAPSULATED_OPTIONS 43 140147072Sbrooks#define DHO_NETBIOS_NAME_SERVERS 44 141147072Sbrooks#define DHO_NETBIOS_DD_SERVER 45 142147072Sbrooks#define DHO_NETBIOS_NODE_TYPE 46 143147072Sbrooks#define DHO_NETBIOS_SCOPE 47 144147072Sbrooks#define DHO_FONT_SERVERS 48 145147072Sbrooks#define DHO_X_DISPLAY_MANAGER 49 146147072Sbrooks#define DHO_DHCP_REQUESTED_ADDRESS 50 147147072Sbrooks#define DHO_DHCP_LEASE_TIME 51 148147072Sbrooks#define DHO_DHCP_OPTION_OVERLOAD 52 149147072Sbrooks#define DHO_DHCP_MESSAGE_TYPE 53 150147072Sbrooks#define DHO_DHCP_SERVER_IDENTIFIER 54 151147072Sbrooks#define DHO_DHCP_PARAMETER_REQUEST_LIST 55 152147072Sbrooks#define DHO_DHCP_MESSAGE 56 153147072Sbrooks#define DHO_DHCP_MAX_MESSAGE_SIZE 57 154147072Sbrooks#define DHO_DHCP_RENEWAL_TIME 58 155147072Sbrooks#define DHO_DHCP_REBINDING_TIME 59 156147072Sbrooks#define DHO_DHCP_CLASS_IDENTIFIER 60 157147072Sbrooks#define DHO_DHCP_CLIENT_IDENTIFIER 61 158183974Sbrooks#define DHO_NISPLUS_DOMAIN 64 159183974Sbrooks#define DHO_NISPLUS_SERVERS 65 160183974Sbrooks#define DHO_TFTP_SERVER_NAME 66 161183974Sbrooks#define DHO_BOOTFILE_NAME 67 162183974Sbrooks#define DHO_MOBILE_IP_HOME_AGENT 68 163147689Sbrooks#define DHO_SMTP_SERVER 69 164147689Sbrooks#define DHO_POP_SERVER 70 165147689Sbrooks#define DHO_NNTP_SERVER 71 166147689Sbrooks#define DHO_WWW_SERVER 72 167147689Sbrooks#define DHO_FINGER_SERVER 73 168147689Sbrooks#define DHO_IRC_SERVER 74 169183974Sbrooks#define DHO_STREETTALK_SERVER 75 170183974Sbrooks#define DHO_STREETTALK_DA_SERVER 76 171147072Sbrooks#define DHO_DHCP_USER_CLASS_ID 77 172230597Sdumbbell#define DHO_DOMAIN_SEARCH 119 173166602Semaste#define DHO_CLASSLESS_ROUTES 121 174147072Sbrooks#define DHO_END 255 175147072Sbrooks 176147072Sbrooks/* DHCP message types. */ 177147072Sbrooks#define DHCPDISCOVER 1 178147072Sbrooks#define DHCPOFFER 2 179147072Sbrooks#define DHCPREQUEST 3 180147072Sbrooks#define DHCPDECLINE 4 181147072Sbrooks#define DHCPACK 5 182147072Sbrooks#define DHCPNAK 6 183147072Sbrooks#define DHCPRELEASE 7 184147072Sbrooks#define DHCPINFORM 8 185