205 lines
7.2 KiB
C
205 lines
7.2 KiB
C
/* dhcp.h
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Protocol structures... */
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/*
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* Copyright (c) 1995-2001 The Internet Software Consortium.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of The Internet Software Consortium nor the names
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* of its contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INTERNET SOFTWARE CONSORTIUM AND
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* CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE INTERNET SOFTWARE CONSORTIUM OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* This software has been written for the Internet Software Consortium
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* by Ted Lemon in cooperation with Vixie Enterprises. To learn more
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* about the Internet Software Consortium, see ``http://www.isc.org''.
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* To learn more about Vixie Enterprises, see ``http://www.vix.com''.
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*/
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#define DHCP_UDP_OVERHEAD (14 + /* Ethernet header */ \
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20 + /* IP header */ \
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8) /* UDP header */
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#define DHCP_SNAME_LEN 64
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#define DHCP_FILE_LEN 128
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#define DHCP_FIXED_NON_UDP 236
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#define DHCP_FIXED_LEN (DHCP_FIXED_NON_UDP + DHCP_UDP_OVERHEAD)
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/* Everything but options. */
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#define DHCP_MTU_MAX 1500
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#define DHCP_OPTION_LEN (DHCP_MTU_MAX - DHCP_FIXED_LEN)
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#define BOOTP_MIN_LEN 300
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#define DHCP_MIN_LEN 548
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struct dhcp_packet {
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u_int8_t op; /* 0: Message opcode/type */
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u_int8_t htype; /* 1: Hardware addr type (net/if_types.h) */
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u_int8_t hlen; /* 2: Hardware addr length */
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u_int8_t hops; /* 3: Number of relay agent hops from client */
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u_int32_t xid; /* 4: Transaction ID */
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u_int16_t secs; /* 8: Seconds since client started looking */
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u_int16_t flags; /* 10: Flag bits */
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struct in_addr ciaddr; /* 12: Client IP address (if already in use) */
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struct in_addr yiaddr; /* 16: Client IP address */
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struct in_addr siaddr; /* 18: IP address of next server to talk to */
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struct in_addr giaddr; /* 20: DHCP relay agent IP address */
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unsigned char chaddr [16]; /* 24: Client hardware address */
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char sname [DHCP_SNAME_LEN]; /* 40: Server name */
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char file [DHCP_FILE_LEN]; /* 104: Boot filename */
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unsigned char options [DHCP_OPTION_LEN];
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/* 212: Optional parameters
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(actual length dependent on MTU). */
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};
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/* BOOTP (rfc951) message types */
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#define BOOTREQUEST 1
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#define BOOTREPLY 2
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/* Possible values for flags field... */
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#define BOOTP_BROADCAST 32768L
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/* Possible values for hardware type (htype) field... */
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#define HTYPE_ETHER 1 /* Ethernet 10Mbps */
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#define HTYPE_IEEE802 6 /* IEEE 802.2 Token Ring... */
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#define HTYPE_FDDI 8 /* FDDI... */
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/* Magic cookie validating dhcp options field (and bootp vendor
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extensions field). */
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#define DHCP_OPTIONS_COOKIE "\143\202\123\143"
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/* DHCP Option codes: */
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#define DHO_PAD 0
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#define DHO_SUBNET_MASK 1
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#define DHO_TIME_OFFSET 2
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#define DHO_ROUTERS 3
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#define DHO_TIME_SERVERS 4
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#define DHO_NAME_SERVERS 5
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#define DHO_DOMAIN_NAME_SERVERS 6
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#define DHO_LOG_SERVERS 7
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#define DHO_COOKIE_SERVERS 8
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#define DHO_LPR_SERVERS 9
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#define DHO_IMPRESS_SERVERS 10
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#define DHO_RESOURCE_LOCATION_SERVERS 11
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#define DHO_HOST_NAME 12
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#define DHO_BOOT_SIZE 13
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#define DHO_MERIT_DUMP 14
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#define DHO_DOMAIN_NAME 15
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#define DHO_SWAP_SERVER 16
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#define DHO_ROOT_PATH 17
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#define DHO_EXTENSIONS_PATH 18
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#define DHO_IP_FORWARDING 19
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#define DHO_NON_LOCAL_SOURCE_ROUTING 20
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#define DHO_POLICY_FILTER 21
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#define DHO_MAX_DGRAM_REASSEMBLY 22
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#define DHO_DEFAULT_IP_TTL 23
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#define DHO_PATH_MTU_AGING_TIMEOUT 24
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#define DHO_PATH_MTU_PLATEAU_TABLE 25
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#define DHO_INTERFACE_MTU 26
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#define DHO_ALL_SUBNETS_LOCAL 27
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#define DHO_BROADCAST_ADDRESS 28
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#define DHO_PERFORM_MASK_DISCOVERY 29
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#define DHO_MASK_SUPPLIER 30
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#define DHO_ROUTER_DISCOVERY 31
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#define DHO_ROUTER_SOLICITATION_ADDRESS 32
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#define DHO_STATIC_ROUTES 33
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#define DHO_TRAILER_ENCAPSULATION 34
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#define DHO_ARP_CACHE_TIMEOUT 35
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#define DHO_IEEE802_3_ENCAPSULATION 36
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#define DHO_DEFAULT_TCP_TTL 37
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#define DHO_TCP_KEEPALIVE_INTERVAL 38
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#define DHO_TCP_KEEPALIVE_GARBAGE 39
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#define DHO_NIS_DOMAIN 40
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#define DHO_NIS_SERVERS 41
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#define DHO_NTP_SERVERS 42
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#define DHO_VENDOR_ENCAPSULATED_OPTIONS 43
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#define DHO_NETBIOS_NAME_SERVERS 44
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#define DHO_NETBIOS_DD_SERVER 45
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#define DHO_NETBIOS_NODE_TYPE 46
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#define DHO_NETBIOS_SCOPE 47
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#define DHO_FONT_SERVERS 48
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#define DHO_X_DISPLAY_MANAGER 49
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#define DHO_DHCP_REQUESTED_ADDRESS 50
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#define DHO_DHCP_LEASE_TIME 51
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#define DHO_DHCP_OPTION_OVERLOAD 52
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#define DHO_DHCP_MESSAGE_TYPE 53
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#define DHO_DHCP_SERVER_IDENTIFIER 54
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#define DHO_DHCP_PARAMETER_REQUEST_LIST 55
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#define DHO_DHCP_MESSAGE 56
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#define DHO_DHCP_MAX_MESSAGE_SIZE 57
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#define DHO_DHCP_RENEWAL_TIME 58
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#define DHO_DHCP_REBINDING_TIME 59
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#define DHO_VENDOR_CLASS_IDENTIFIER 60
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#define DHO_DHCP_CLIENT_IDENTIFIER 61
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#define DHO_NWIP_DOMAIN_NAME 62
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#define DHO_NWIP_SUBOPTIONS 63
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#define DHO_USER_CLASS 77
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#define DHO_FQDN 81
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#define DHO_DHCP_AGENT_OPTIONS 82
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/* Options 93, 94, and 97 are define in the Intel Preboot Execution
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Environment (PXE) specification, version 2.1, September 20, 1999,
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page 19. */
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#define DHO_PXE_CLIENT_ARCH_ID 93
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#define DHO_PXE_CLIENT_NETIF_ID 94
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#define DHO_PXE_UUID 97
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#define DHO_SUBNET_SELECTION 118 /* RFC3011! */
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/* The DHO_AUTHENTICATE option is not a standard yet, so I've
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allocated an option out of the "local" option space for it on a
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temporary basis. Once an option code number is assigned, I will
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immediately and shamelessly break this, so don't count on it
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continuing to work. */
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#define DHO_AUTHENTICATE 210
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#define DHO_END 255
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/* DHCP message types. */
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#define DHCPDISCOVER 1
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#define DHCPOFFER 2
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#define DHCPREQUEST 3
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#define DHCPDECLINE 4
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#define DHCPACK 5
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#define DHCPNAK 6
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#define DHCPRELEASE 7
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#define DHCPINFORM 8
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/* Relay Agent Information option subtypes: */
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#define RAI_CIRCUIT_ID 1
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#define RAI_REMOTE_ID 2
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#define RAI_AGENT_ID 3
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/* FQDN suboptions: */
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#define FQDN_NO_CLIENT_UPDATE 1
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#define FQDN_SERVER_UPDATE 2
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#define FQDN_ENCODED 3
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#define FQDN_RCODE1 4
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#define FQDN_RCODE2 5
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#define FQDN_HOSTNAME 6
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#define FQDN_DOMAINNAME 7
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#define FQDN_FQDN 8
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#define FQDN_SUBOPTION_COUNT 8
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