1741bbb9fSAntonio Huete Jimenez /* $OpenBSD: src/sbin/dhclient/dhcp.h,v 1.9 2011/05/11 14:38:36 krw Exp $ */ 2846204b6SHasso Tepper 3846204b6SHasso Tepper /* Protocol structures... */ 4846204b6SHasso Tepper 5846204b6SHasso Tepper /* 6846204b6SHasso Tepper * Copyright (c) 1995, 1996 The Internet Software Consortium. 7846204b6SHasso Tepper * All rights reserved. 8846204b6SHasso Tepper * 9846204b6SHasso Tepper * Redistribution and use in source and binary forms, with or without 10846204b6SHasso Tepper * modification, are permitted provided that the following conditions 11846204b6SHasso Tepper * are met: 12846204b6SHasso Tepper * 13846204b6SHasso Tepper * 1. Redistributions of source code must retain the above copyright 14846204b6SHasso Tepper * notice, this list of conditions and the following disclaimer. 15846204b6SHasso Tepper * 2. Redistributions in binary form must reproduce the above copyright 16846204b6SHasso Tepper * notice, this list of conditions and the following disclaimer in the 17846204b6SHasso Tepper * documentation and/or other materials provided with the distribution. 18846204b6SHasso Tepper * 3. Neither the name of The Internet Software Consortium nor the names 19846204b6SHasso Tepper * of its contributors may be used to endorse or promote products derived 20846204b6SHasso Tepper * from this software without specific prior written permission. 21846204b6SHasso Tepper * 22846204b6SHasso Tepper * THIS SOFTWARE IS PROVIDED BY THE INTERNET SOFTWARE CONSORTIUM AND 23846204b6SHasso Tepper * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, 24846204b6SHasso Tepper * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 25846204b6SHasso Tepper * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 26846204b6SHasso Tepper * DISCLAIMED. IN NO EVENT SHALL THE INTERNET SOFTWARE CONSORTIUM OR 27846204b6SHasso Tepper * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 28846204b6SHasso Tepper * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 29846204b6SHasso Tepper * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 30846204b6SHasso Tepper * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 31846204b6SHasso Tepper * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 32846204b6SHasso Tepper * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 33846204b6SHasso Tepper * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34846204b6SHasso Tepper * SUCH DAMAGE. 35846204b6SHasso Tepper * 36846204b6SHasso Tepper * This software has been written for the Internet Software Consortium 37846204b6SHasso Tepper * by Ted Lemon <mellon@fugue.com> in cooperation with Vixie 38846204b6SHasso Tepper * Enterprises. To learn more about the Internet Software Consortium, 39846204b6SHasso Tepper * see ``http://www.vix.com/isc''. To learn more about Vixie 40846204b6SHasso Tepper * Enterprises, see ``http://www.vix.com''. 41846204b6SHasso Tepper */ 42846204b6SHasso Tepper 43846204b6SHasso Tepper #define DHCP_UDP_OVERHEAD (20 + /* IP header */ \ 44846204b6SHasso Tepper 8) /* UDP header */ 45846204b6SHasso Tepper #define DHCP_SNAME_LEN 64 46846204b6SHasso Tepper #define DHCP_FILE_LEN 128 47846204b6SHasso Tepper #define DHCP_FIXED_NON_UDP 236 48846204b6SHasso Tepper #define DHCP_FIXED_LEN (DHCP_FIXED_NON_UDP + DHCP_UDP_OVERHEAD) 49846204b6SHasso Tepper /* Everything but options. */ 50846204b6SHasso Tepper #define DHCP_MTU_MAX 1500 51846204b6SHasso Tepper #define DHCP_OPTION_LEN (DHCP_MTU_MAX - DHCP_FIXED_LEN) 52846204b6SHasso Tepper 53846204b6SHasso Tepper #define BOOTP_MIN_LEN 300 54846204b6SHasso Tepper 55846204b6SHasso Tepper struct dhcp_packet { 56846204b6SHasso Tepper u_int8_t op; /* Message opcode/type */ 57846204b6SHasso Tepper u_int8_t htype; /* Hardware addr type (see net/if_types.h) */ 58846204b6SHasso Tepper u_int8_t hlen; /* Hardware addr length */ 59846204b6SHasso Tepper u_int8_t hops; /* Number of relay agent hops from client */ 60846204b6SHasso Tepper u_int32_t xid; /* Transaction ID */ 61846204b6SHasso Tepper u_int16_t secs; /* Seconds since client started looking */ 62846204b6SHasso Tepper u_int16_t flags; /* Flag bits */ 63846204b6SHasso Tepper struct in_addr ciaddr; /* Client IP address (if already in use) */ 64846204b6SHasso Tepper struct in_addr yiaddr; /* Client IP address */ 65846204b6SHasso Tepper struct in_addr siaddr; /* IP address of next server to talk to */ 66846204b6SHasso Tepper struct in_addr giaddr; /* DHCP relay agent IP address */ 67846204b6SHasso Tepper unsigned char chaddr[16]; /* Client hardware address */ 68846204b6SHasso Tepper char sname[DHCP_SNAME_LEN]; /* Server name */ 69846204b6SHasso Tepper char file[DHCP_FILE_LEN]; /* Boot filename */ 70846204b6SHasso Tepper unsigned char options[DHCP_OPTION_LEN]; 71846204b6SHasso Tepper /* Optional parameters 72846204b6SHasso Tepper (actual length dependent on MTU). */ 73846204b6SHasso Tepper }; 74846204b6SHasso Tepper 75846204b6SHasso Tepper /* BOOTP (rfc951) message types */ 76846204b6SHasso Tepper #define BOOTREQUEST 1 77846204b6SHasso Tepper #define BOOTREPLY 2 78846204b6SHasso Tepper 79846204b6SHasso Tepper /* Possible values for flags field... */ 80846204b6SHasso Tepper #define BOOTP_BROADCAST 32768L 81846204b6SHasso Tepper 82846204b6SHasso Tepper /* Possible values for hardware type (htype) field... */ 83846204b6SHasso Tepper #define HTYPE_ETHER 1 /* Ethernet */ 84846204b6SHasso Tepper #define HTYPE_IEEE802 6 /* IEEE 802.2 Token Ring... */ 85846204b6SHasso Tepper #define HTYPE_FDDI 8 /* FDDI... */ 86846204b6SHasso Tepper 87846204b6SHasso Tepper /* Magic cookie validating dhcp options field (and bootp vendor 88846204b6SHasso Tepper extensions field). */ 89846204b6SHasso Tepper #define DHCP_OPTIONS_COOKIE "\143\202\123\143" 90741bbb9fSAntonio Huete Jimenez #define DHCP_OPTIONS_MESSAGE_TYPE "\065\001\000" 91846204b6SHasso Tepper 92846204b6SHasso Tepper /* DHCP Option codes: */ 93846204b6SHasso Tepper 94846204b6SHasso Tepper #define DHO_PAD 0 95846204b6SHasso Tepper #define DHO_SUBNET_MASK 1 96846204b6SHasso Tepper #define DHO_TIME_OFFSET 2 97846204b6SHasso Tepper #define DHO_ROUTERS 3 98846204b6SHasso Tepper #define DHO_TIME_SERVERS 4 99846204b6SHasso Tepper #define DHO_NAME_SERVERS 5 100846204b6SHasso Tepper #define DHO_DOMAIN_NAME_SERVERS 6 101846204b6SHasso Tepper #define DHO_LOG_SERVERS 7 102846204b6SHasso Tepper #define DHO_COOKIE_SERVERS 8 103846204b6SHasso Tepper #define DHO_LPR_SERVERS 9 104846204b6SHasso Tepper #define DHO_IMPRESS_SERVERS 10 105846204b6SHasso Tepper #define DHO_RESOURCE_LOCATION_SERVERS 11 106846204b6SHasso Tepper #define DHO_HOST_NAME 12 107846204b6SHasso Tepper #define DHO_BOOT_SIZE 13 108846204b6SHasso Tepper #define DHO_MERIT_DUMP 14 109846204b6SHasso Tepper #define DHO_DOMAIN_NAME 15 110846204b6SHasso Tepper #define DHO_SWAP_SERVER 16 111846204b6SHasso Tepper #define DHO_ROOT_PATH 17 112846204b6SHasso Tepper #define DHO_EXTENSIONS_PATH 18 113846204b6SHasso Tepper #define DHO_IP_FORWARDING 19 114846204b6SHasso Tepper #define DHO_NON_LOCAL_SOURCE_ROUTING 20 115846204b6SHasso Tepper #define DHO_POLICY_FILTER 21 116846204b6SHasso Tepper #define DHO_MAX_DGRAM_REASSEMBLY 22 117846204b6SHasso Tepper #define DHO_DEFAULT_IP_TTL 23 118846204b6SHasso Tepper #define DHO_PATH_MTU_AGING_TIMEOUT 24 119846204b6SHasso Tepper #define DHO_PATH_MTU_PLATEAU_TABLE 25 120846204b6SHasso Tepper #define DHO_INTERFACE_MTU 26 121846204b6SHasso Tepper #define DHO_ALL_SUBNETS_LOCAL 27 122846204b6SHasso Tepper #define DHO_BROADCAST_ADDRESS 28 123846204b6SHasso Tepper #define DHO_PERFORM_MASK_DISCOVERY 29 124846204b6SHasso Tepper #define DHO_MASK_SUPPLIER 30 125846204b6SHasso Tepper #define DHO_ROUTER_DISCOVERY 31 126846204b6SHasso Tepper #define DHO_ROUTER_SOLICITATION_ADDRESS 32 127846204b6SHasso Tepper #define DHO_STATIC_ROUTES 33 128846204b6SHasso Tepper #define DHO_TRAILER_ENCAPSULATION 34 129846204b6SHasso Tepper #define DHO_ARP_CACHE_TIMEOUT 35 130846204b6SHasso Tepper #define DHO_IEEE802_3_ENCAPSULATION 36 131846204b6SHasso Tepper #define DHO_DEFAULT_TCP_TTL 37 132846204b6SHasso Tepper #define DHO_TCP_KEEPALIVE_INTERVAL 38 133846204b6SHasso Tepper #define DHO_TCP_KEEPALIVE_GARBAGE 39 134846204b6SHasso Tepper #define DHO_NIS_DOMAIN 40 135846204b6SHasso Tepper #define DHO_NIS_SERVERS 41 136846204b6SHasso Tepper #define DHO_NTP_SERVERS 42 137846204b6SHasso Tepper #define DHO_VENDOR_ENCAPSULATED_OPTIONS 43 138846204b6SHasso Tepper #define DHO_NETBIOS_NAME_SERVERS 44 139846204b6SHasso Tepper #define DHO_NETBIOS_DD_SERVER 45 140846204b6SHasso Tepper #define DHO_NETBIOS_NODE_TYPE 46 141846204b6SHasso Tepper #define DHO_NETBIOS_SCOPE 47 142846204b6SHasso Tepper #define DHO_FONT_SERVERS 48 143846204b6SHasso Tepper #define DHO_X_DISPLAY_MANAGER 49 144846204b6SHasso Tepper #define DHO_DHCP_REQUESTED_ADDRESS 50 145846204b6SHasso Tepper #define DHO_DHCP_LEASE_TIME 51 146846204b6SHasso Tepper #define DHO_DHCP_OPTION_OVERLOAD 52 147846204b6SHasso Tepper #define DHO_DHCP_MESSAGE_TYPE 53 148846204b6SHasso Tepper #define DHO_DHCP_SERVER_IDENTIFIER 54 149846204b6SHasso Tepper #define DHO_DHCP_PARAMETER_REQUEST_LIST 55 150846204b6SHasso Tepper #define DHO_DHCP_MESSAGE 56 151846204b6SHasso Tepper #define DHO_DHCP_MAX_MESSAGE_SIZE 57 152846204b6SHasso Tepper #define DHO_DHCP_RENEWAL_TIME 58 153846204b6SHasso Tepper #define DHO_DHCP_REBINDING_TIME 59 154846204b6SHasso Tepper #define DHO_DHCP_CLASS_IDENTIFIER 60 155846204b6SHasso Tepper #define DHO_DHCP_CLIENT_IDENTIFIER 61 1567a6ba664SAntonio Huete Jimenez #define DHO_TFTP_SERVER 66 157846204b6SHasso Tepper #define DHO_DHCP_USER_CLASS_ID 77 158*6bdc8b43SMatthew Dillon #define DHO_CLASSLESS_ROUTES 121 159846204b6SHasso Tepper #define DHO_END 255 160846204b6SHasso Tepper 161846204b6SHasso Tepper /* DHCP message types. */ 162846204b6SHasso Tepper #define DHCPDISCOVER 1 163846204b6SHasso Tepper #define DHCPOFFER 2 164846204b6SHasso Tepper #define DHCPREQUEST 3 165846204b6SHasso Tepper #define DHCPDECLINE 4 166846204b6SHasso Tepper #define DHCPACK 5 167846204b6SHasso Tepper #define DHCPNAK 6 168846204b6SHasso Tepper #define DHCPRELEASE 7 169846204b6SHasso Tepper #define DHCPINFORM 8 170