stables.c

DHCP服务器源码

/* stables.c

   Tables of information only used by server... */

/*
 * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
 * Copyright (c) 1995-2003 by Internet Software Consortium
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * 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.
 *   950 Charter Street
 *   Redwood City, CA 94063
 *   <[e-mail]>
 *   http://www.isc.org/
 *
 * This software has been written for Internet Systems Consortium
 * by Ted Lemon in cooperation with Vixie Enterprises and Nominum, Inc.
 * To learn more about Internet Systems Consortium, see
 * ``http://www.isc.org/''.  To learn more about Vixie Enterprises,
 * see ``http://www.vix.com''.   To learn more about Nominum, Inc., see
 * ``http://www.nominum.com''.
 */

#ifndef lint
static char copyright[] =
"$Id: stables.c,v 1.25.2.12 2004/06/10 17:59:58 dhankins Exp $ Copyright (c) 2004 Internet Systems Consortium.  All rights reserved.\n";
#endif /* not lint */

#include "dhcpd.h"

#if defined (FAILOVER_PROTOCOL)

/* This is used to indicate some kind of failure when generating a
   failover option. */
failover_option_t null_failover_option = { 0, 0 };
failover_option_t skip_failover_option = { 0, 0 };

/* Information about failover options, for printing, encoding
   and decoding. */
struct failover_option_info ft_options [] =
{
	{ 0, "unused", FT_UNDEF, 0, 0, 0 },
	{ FTO_BINDING_STATUS, "binding-status",
	  FT_UINT8, 1, FM_OFFSET (binding_status), FTB_BINDING_STATUS },
	{ FTO_ASSIGNED_IP_ADDRESS, "assigned-IP-address",
	  FT_IPADDR, 1, FM_OFFSET (assigned_addr), FTB_ASSIGNED_IP_ADDRESS },
	{ FTO_SERVER_ADDR, "sending-server-IP-address",
	  FT_IPADDR, 1, FM_OFFSET (server_addr), FTB_SERVER_ADDR },
	{ FTO_ADDRESSES_TRANSFERRED, "addresses-transferred",
	  FT_UINT32, 1, FM_OFFSET (addresses_transferred),
	  FTB_ADDRESSES_TRANSFERRED },
	{ FTO_CLIENT_IDENTIFIER, "client-identifier",
	  FT_BYTES, 0, FM_OFFSET (client_identifier), FTB_CLIENT_IDENTIFIER },
	{ FTO_CHADDR, "client-hardware-address",
	  FT_BYTES, 0, FM_OFFSET (chaddr), FTB_CHADDR },
	{ FTO_DDNS, "DDNS",
	  FT_DDNS, 1, FM_OFFSET (ddns), FTB_DDNS },
	{ FTO_REJECT_REASON, "reject-reason",
	  FT_UINT8, 1, FM_OFFSET (reject_reason), FTB_REJECT_REASON },
	{ FTO_MESSAGE, "message",
	  FT_TEXT, 0, FM_OFFSET (message), FTB_MESSAGE },
	{ FTO_MCLT, "MCLT",
	  FT_UINT32, 1, FM_OFFSET (mclt), FTB_MCLT },
	{ FTO_VENDOR_CLASS, "vendor-class-identifier",
	  FT_TEXT_OR_BYTES, 0, FM_OFFSET (vendor_class), FTB_VENDOR_CLASS },
	{ 12, "undefined", FT_UNDEF, 0, 0, 0 },
	{ FTO_LEASE_EXPIRY, "lease-expiration-time",
	  FT_UINT32, 1, FM_OFFSET (expiry), FTB_LEASE_EXPIRY },
	{ FTO_POTENTIAL_EXPIRY, "potential-expiration-time",
	  FT_UINT32, 1, FM_OFFSET (potential_expiry), FTB_POTENTIAL_EXPIRY },
	{ FTO_GRACE_EXPIRY, "grace-expiration-time",
	  FT_UINT32, 1, FM_OFFSET (grace_expiry), FTB_GRACE_EXPIRY },
	{ FTO_CLTT, "client-last-transaction-time",
	  FT_UINT32, 1, FM_OFFSET (client_ltt), FTB_CLTT },
	{ FTO_STOS, "start-time-of-state",
	  FT_UINT32, 1, FM_OFFSET (stos), FTB_STOS },
	{ FTO_SERVER_STATE, "server-state",
	  FT_UINT8, 1, FM_OFFSET (server_state), FTB_SERVER_STATE },
	{ FTO_SERVER_FLAGS, "server-flags",
	  FT_UINT8, 1, FM_OFFSET (server_flags), FTB_SERVER_FLAGS },
	{ FTO_VENDOR_OPTIONS, "vendor-specific-options",
	  FT_BYTES, 0, FM_OFFSET (vendor_options), FTB_VENDOR_OPTIONS },
	{ FTO_MAX_UNACKED, "max-unacked-bndupd",
	  FT_UINT32, 1, FM_OFFSET (max_unacked), FTB_MAX_UNACKED },
	{ 22, "undefined", FT_UNDEF, 0, 0 },
	{ FTO_RECEIVE_TIMER, "receive-timer",
	  FT_UINT32, 1, FM_OFFSET (receive_timer), FTB_RECEIVE_TIMER },
	{ FTO_HBA, "hash-bucket-assignment",
	  FT_BYTES, 0, FM_OFFSET (hba), FTB_HBA },
	{ FTO_MESSAGE_DIGEST, "message-digest",
	  FT_DIGEST, 0, 0, FTB_MESSAGE_DIGEST },
	{ FTO_PROTOCOL_VERSION, "protocol-version", 
	  FT_UINT8, 1, FM_OFFSET (protocol_version), FTB_PROTOCOL_VERSION },
	{ FTO_TLS_REQUEST, "TLS-request",
	  FT_UINT8, 2, FM_OFFSET (tls_request), FTB_TLS_REQUEST },
	{ FTO_TLS_REPLY, "TLS-reply",
	  FT_BYTES, 1, FM_OFFSET (tls_reply ), FTB_TLS_REPLY },
	{ FTO_REQUEST_OPTIONS, "client-request-options",
	  FT_BYTES, 0, FM_OFFSET (request_options), FTB_REQUEST_OPTIONS },
	{ FTO_REPLY_OPTIONS, "client-reply-options",
	  FT_BYTES, 0, FM_OFFSET (reply_options), FTB_REPLY_OPTIONS }
};

/* These are really options that make sense for a particular request - if
   some other option comes in, we're not going to use it, so we can just
   discard it.  Note that the message-digest option is allowed for all
   message types, but is not saved - it's just used to validate the message
   and then discarded - so it's not mentioned here. */

u_int32_t fto_allowed [] = {
	0,	/* 0 unused */
	0,	/* 1 POOLREQ */
	FTB_ADDRESSES_TRANSFERRED, /* 2 POOLRESP */
	(FTB_ASSIGNED_IP_ADDRESS | FTB_BINDING_STATUS | FTB_CLIENT_IDENTIFIER |
	 FTB_CHADDR | FTB_LEASE_EXPIRY | FTB_POTENTIAL_EXPIRY | FTB_STOS |
	 FTB_CLTT | FTB_REQUEST_OPTIONS | FTB_REPLY_OPTIONS), /* 3 BNDUPD */
	(FTB_ASSIGNED_IP_ADDRESS | FTB_BINDING_STATUS | FTB_CLIENT_IDENTIFIER |
	 FTB_CHADDR | FTB_LEASE_EXPIRY | FTB_POTENTIAL_EXPIRY | FTB_STOS |
	 FTB_CLTT | FTB_REQUEST_OPTIONS | FTB_REPLY_OPTIONS |
	 FTB_REJECT_REASON | FTB_MESSAGE), /* 4 BNDACK */
	(FTB_SERVER_ADDR | FTB_MAX_UNACKED | FTB_RECEIVE_TIMER |
	 FTB_VENDOR_CLASS | FTB_PROTOCOL_VERSION | FTB_TLS_REQUEST |
	 FTB_MCLT | FTB_HBA), /* 5 CONNECT */
	(FTB_SERVER_ADDR | FTB_MAX_UNACKED | FTB_RECEIVE_TIMER |
	 FTB_VENDOR_CLASS | FTB_PROTOCOL_VERSION | FTB_TLS_REPLY |
	 FTB_REJECT_REASON | FTB_MESSAGE), /* CONNECTACK */
	0, /* 7 UPDREQ */
	0, /* 8 UPDDONE */
	0, /* 9 UPDREQALL */
	(FTB_SERVER_STATE | FTB_SERVER_FLAGS | FTB_STOS), /* 10 STATE */
	0,	/* 11 CONTACT */
	(FTB_REJECT_REASON | FTB_MESSAGE) /* 12 DISCONNECT */
};

/* Sizes of the various types. */
int ft_sizes [] = {
	1, /* FT_UINT8 */
	4, /* FT_IPADDR */
	4, /* FT_UINT32 */
	1, /* FT_BYTES */
	1, /* FT_TEXT_OR_BYTES */
	0, /* FT_DDNS */
	0, /* FT_DDNS1 */
	2, /* FT_UINT16 */
	1, /* FT_TEXT */
	0, /* FT_UNDEF */
	0, /* FT_DIGEST */
};

/* Names of the various failover link states. */
const char *dhcp_flink_state_names [] = {
	"invalid state 0",
	"startup",
	"message length wait",
	"message wait",
	"disconnected"
};
#endif /* FAILOVER_PROTOCOL */

/* Failover binding state names.   These are used even if there is no
   failover protocol support. */
const char *binding_state_names [] = {
	"free", "active", "expired", "released", "abandoned",
	"reset", "backup", "reserved", "bootp" };

struct universe agent_universe;
struct option agent_options [256] = {
	{ "pad", "",					&agent_universe, 0 },
	{ "circuit-id", "X",				&agent_universe, 1 },
	{ "remote-id", "X",				&agent_universe, 2 },
	{ "agent-id", "I",				&agent_universe, 3 },
	{ "DOCSIS-device-class", "L",			&agent_universe, 4 },
	{ "unknown-5", "X",				&agent_universe, 5 },
	{ "unknown-6", "X",				&agent_universe, 6 },
	{ "unknown-7", "X",				&agent_universe, 7 },
	{ "unknown-8", "X",				&agent_universe, 8 },
	{ "unknown-9", "X",				&agent_universe, 9 },
	{ "unknown-10", "X",				&agent_universe, 10 },
	{ "unknown-11", "X",				&agent_universe, 11 },
	{ "unknown-12", "X",				&agent_universe, 12 },
	{ "unknown-13", "X",				&agent_universe, 13 },
	{ "unknown-14", "X",				&agent_universe, 14 },
	{ "unknown-15", "X",				&agent_universe, 15 },
	{ "unknown-16", "X",				&agent_universe, 16 },
	{ "unknown-17", "X",				&agent_universe, 17 },
	{ "unknown-18", "X",				&agent_universe, 18 },
	{ "unknown-19", "X",				&agent_universe, 19 },
	{ "unknown-20", "X",				&agent_universe, 20 },
	{ "unknown-21", "X",				&agent_universe, 21 },
	{ "unknown-22", "X",				&agent_universe, 22 },
	{ "unknown-23", "X",				&agent_universe, 23 },
	{ "unknown-24", "X",				&agent_universe, 24 },
	{ "unknown-25", "X",				&agent_universe, 25 },
	{ "unknown-26", "X",				&agent_universe, 26 },
	{ "unknown-27", "X",				&agent_universe, 27 },
	{ "unknown-28", "X",				&agent_universe, 28 },
	{ "unknown-29", "X",				&agent_universe, 29 },
	{ "unknown-30", "X",				&agent_universe, 30 },
	{ "unknown-31", "X",				&agent_universe, 31 },
	{ "unknown-32", "X",				&agent_universe, 32 },
	{ "unknown-33", "X",				&agent_universe, 33 },
	{ "unknown-34", "X",				&agent_universe, 34 },
	{ "unknown-35", "X",				&agent_universe, 35 },
	{ "unknown-36", "X",				&agent_universe, 36 },
	{ "unknown-37", "X",				&agent_universe, 37 },
	{ "unknown-38", "X",				&agent_universe, 38 },
	{ "unknown-39", "X",				&agent_universe, 39 },
	{ "unknown-40", "X",				&agent_universe, 40 },
	{ "unknown-41", "X",				&agent_universe, 41 },
	{ "unknown-42", "X",				&agent_universe, 42 },
	{ "unknown-43", "X",				&agent_universe, 43 },
	{ "unknown-44", "X",				&agent_universe, 44 },
	{ "unknown-45", "X",				&agent_universe, 45 },
	{ "unknown-46", "X",				&agent_universe, 46 },
	{ "unknown-47", "X",				&agent_universe, 47 },
	{ "unknown-48", "X",				&agent_universe, 48 },
	{ "unknown-49", "X",				&agent_universe, 49 },
	{ "unknown-50", "X",				&agent_universe, 50 },
	{ "unknown-51", "X",				&agent_universe, 51 },
	{ "unknown-52", "X",				&agent_universe, 52 },
	{ "unknown-53", "X",				&agent_universe, 53 },
	{ "unknown-54", "X",				&agent_universe, 54 },
	{ "unknown-55", "X",				&agent_universe, 55 },
	{ "unknown-56", "X",				&agent_universe, 56 },
	{ "unknown-57", "X",				&agent_universe, 57 },
	{ "unknown-58", "X",				&agent_universe, 58 },
	{ "unknown-59", "X",				&agent_universe, 59 },
	{ "unknown-60", "X",				&agent_universe, 60 },
	{ "unknown-61", "X",				&agent_universe, 61 },
	{ "unknown-62", "X",				&agent_universe, 62 },
	{ "unknown-63", "X",				&agent_universe, 63 },
	{ "unknown-64", "X",				&agent_universe, 64 },
	{ "unknown-65", "X",				&agent_universe, 65 },
	{ "unknown-66", "X",				&agent_universe, 66 },
	{ "unknown-67", "X",				&agent_universe, 67 },
	{ "unknown-68", "X",				&agent_universe, 68 },
	{ "unknown-69", "X",				&agent_universe, 69 },
	{ "unknown-70", "X",				&agent_universe, 70 },
	{ "unknown-71", "X",				&agent_universe, 71 },
	{ "unknown-72", "X",				&agent_universe, 72 },
	{ "unknown-73", "X",				&agent_universe, 73 },
	{ "unknown-74", "X",				&agent_universe, 74 },
	{ "unknown-75", "X",				&agent_universe, 75 },
	{ "unknown-76", "X",				&agent_universe, 76 },
	{ "unknown-77", "X",				&agent_universe, 77 },
	{ "unknown-78", "X",				&agent_universe, 78 },
	{ "unknown-79", "X",				&agent_universe, 79 },
	{ "unknown-80", "X",				&agent_universe, 80 },
	{ "unknown-81", "X",				&agent_universe, 81 },
	{ "unknown-82", "X",				&agent_universe, 82 },
	{ "unknown-83", "X",				&agent_universe, 83 },
	{ "unknown-84", "X",				&agent_universe, 84 },
	{ "unknown-85", "X",				&agent_universe, 85 },
	{ "unknown-86", "X",				&agent_universe, 86 },
	{ "unknown-87", "X",				&agent_universe, 87 },
	{ "unknown-88", "X",				&agent_universe, 88 },
	{ "unknown-89", "X",				&agent_universe, 89 },
	{ "unknown-90", "X",				&agent_universe, 90 },
	{ "unknown-91", "X",				&agent_universe, 91 },
	{ "unknown-92", "X",				&agent_universe, 92 },
	{ "unknown-93", "X",				&agent_universe, 93 },
	{ "unknown-94", "X",				&agent_universe, 94 },
	{ "unknown-95", "X",				&agent_universe, 95 },
	{ "unknown-96", "X",				&agent_universe, 96 },
	{ "unknown-97", "X",				&agent_universe, 97 },
	{ "unknown-98", "X",				&agent_universe, 98 },
	{ "unknown-99", "X",				&agent_universe, 99 },
	{ "unknown-100", "X",				&agent_universe, 100 },
	{ "unknown-101", "X",				&agent_universe, 101 },
	{ "unknown-102", "X",				&agent_universe, 102 },
	{ "unknown-103", "X",				&agent_universe, 103 },
	{ "unknown-104", "X",				&agent_universe, 104 },