/* tables of names for values defined in constants.h
 * Copyright (C) 1998, 1999  D. Hugh Redelmeier.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2 of the License, or (at your
 * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * for more details.
 *
 * RCSID $Id: constants.c,v 1.47 2001/05/29 18:39:56 dhr Exp $
 */

/*
 * Note that the array sizes are all specified; this is to enable range
 * checking by code that only includes constants.h.
 */

#include <stddef.h>
#include <string.h>
#include <stdio.h>
#include <netinet/in.h>

#include <freeswan.h>

#include "constants.h"
#include "defs.h"
#include "packet.h"

struct enum_names {
    unsigned long en_first;  /* first value in range */
    unsigned long en_last;   /* last value in range (inclusive) */
    const char *const *en_names;
    const struct enum_names *en_next_range;	/* descriptor of next range */
};

/* version */

static const char *const version_name[] = {
	"ISAKMP Version 1.0",
};

enum_names version_names =
    { ISAKMP_MAJOR_VERSION<<ISA_MAJ_SHIFT | ISAKMP_MINOR_VERSION,
	ISAKMP_MAJOR_VERSION<<ISA_MAJ_SHIFT | ISAKMP_MINOR_VERSION,
	version_name, NULL };

/* Timer events */

static const char *const timer_event_name[] = {
	"EVENT_NULL",
	"EVENT_REINIT_SECRET",
	"EVENT_SHUNT_SCAN",
	"EVENT_SO_DISCARD",
	"EVENT_RETRANSMIT",
	"EVENT_SA_REPLACE",
	"EVENT_SA_EXPIRE",
    };

enum_names timer_event_names =
    { EVENT_NULL, EVENT_SA_EXPIRE, timer_event_name, NULL };

/* Domain of Interpretation */

static const char *const doi_name[] = {
	"ISAKMP_DOI_ISAKMP",
	"ISAKMP_DOI_IPSEC",
};

enum_names doi_names = { ISAKMP_DOI_ISAKMP, ISAKMP_DOI_IPSEC, doi_name, NULL };

/* debugging settings: a set selections for reporting
 * These would be more naturally situated in log.h,
 * but they are shared with whack.
 */
#ifdef DEBUG
const char *const debug_bit_names[] = {
	"debug-raw",
	"debug-crypt",
	"debug-parsing",
	"debug-emitting",
	"debug-control",
	"debug-klips",
	"debug-private",
	NULL
    };
#endif

/* State of exchanges */

static const char *const state_name[] = {
	"STATE_MAIN_R0",
	"STATE_MAIN_I1",
	"STATE_MAIN_R1",
	"STATE_MAIN_I2",
	"STATE_MAIN_R2",
	"STATE_MAIN_I3",
	"STATE_MAIN_R3",
	"STATE_MAIN_I4",

	"STATE_QUICK_R0",
	"STATE_QUICK_I1",
	"STATE_QUICK_R1",
	"STATE_QUICK_I2",
	"STATE_QUICK_R2",

	"STATE_INFO",
	"STATE_INFO_PROTECTED",
    };

enum_names state_names =
    { STATE_MAIN_R0, STATE_INFO_PROTECTED, state_name, NULL };

/* story for state */

const char *const state_story[] = {
	"expecting MI1",	/* STATE_MAIN_R0 */
	"sent MI1, expecting MR1",	/* STATE_MAIN_I1 */
	"sent MR1, expecting MI2",	/* STATE_MAIN_R1 */
	"sent MI2, expecting MR2",	/* STATE_MAIN_I2 */
	"sent MR2, expecting MI3",	/* STATE_MAIN_R2 */
	"sent MI3, expecting MR3",	/* STATE_MAIN_I3 */
	"sent MR3, ISAKMP SA established",	/* STATE_MAIN_R3 */
	"ISAKMP SA established",	/* STATE_MAIN_I4 */

	"expecting QI1",	/* STATE_QUICK_R0 */
	"sent QI1, expecting QR1",	/* STATE_QUICK_I1 */
	"sent QR1, inbound IPsec SA installed, expecting QI2",	/* STATE_QUICK_R1 */
	"sent QI2, IPsec SA established",	/* STATE_QUICK_I2 */
	"IPsec SA established",	/* STATE_QUICK_R2 */

	"got Informational Message in clear",	/* STATE_INFO */
	"got encrypted Informational Message",	/* STATE_INFO_PROTECTED */
    };

/* kind of struct connection */

static const char *const connection_kind_name[] = {
    "CK_TEMPLATE",	/* abstract connection, with wildcard */
    "CK_PERMANENT",	/* normal connection */
    "CK_INSTANCE",	/* instance of template, created for a particular attempt */
    "CK_GOING_AWAY"	/* instance being deleted -- don't delete again */
};

enum_names connection_kind_names =
    { CK_TEMPLATE, CK_GOING_AWAY, connection_kind_name, NULL };

/* routing status names */

static const char *const routing_story_strings[] = {
    "unrouted",	/* RT_UNROUTED: unrouted */
    "unrouted HOLD",	/* RT_UNROUTED_HOLD: unrouted, but HOLD eroute installed */
    "trap erouted",	/* RT_ROUTED_PROSPECTIVE: routed, and TRAP eroute installed */
    "routed HOLD",	/* RT_ROUTED_HOLD: routed, and HOLD eroute installed */
    "fail erouted",	/* RT_ROUTED_FAILURE: routed, and failure-context shunt eroute installed */
    "erouted",	/* RT_ROUTED_TUNNEL: routed, and erouted to an IPSEC SA group */
    };

enum_names routing_story =
    { RT_UNROUTED, RT_ROUTED_TUNNEL, routing_story_strings, NULL};

/* Payload types (draft-ietf-ipsec-isakmp-09.txt section 3.1) */

const char *const payload_name[] = {
	"ISAKMP_NEXT_NONE",
	"ISAKMP_NEXT_SA",
	"ISAKMP_NEXT_P",
	"ISAKMP_NEXT_T",
	"ISAKMP_NEXT_KE",
	"ISAKMP_NEXT_ID",
	"ISAKMP_NEXT_CERT",
	"ISAKMP_NEXT_CR",
	"ISAKMP_NEXT_HASH",
	"ISAKMP_NEXT_SIG",
	"ISAKMP_NEXT_NONCE",
	"ISAKMP_NEXT_N",
	"ISAKMP_NEXT_D",
	"ISAKMP_NEXT_VID",
	NULL
    };

enum_names payload_names =
    { ISAKMP_NEXT_NONE, ISAKMP_NEXT_VID, payload_name, NULL };


/* Exchange types (note: two discontinuous ranges) */

static const char *const exchange_name[] = {
	"ISAKMP_XCHG_NONE",
	"ISAKMP_XCHG_BASE",
	"ISAKMP_XCHG_IDPROT",
	"ISAKMP_XCHG_AO",
	"ISAKMP_XCHG_AGGR",
	"ISAKMP_XCHG_INFO",
    };

static const char *const exchange_name2[] = {
	"ISAKMP_XCHG_QUICK",
	"ISAKMP_XCHG_NGRP",
	"ISAKMP_XCHG_ACK_INFO",
    };

static enum_names exchange_desc2 =
    { ISAKMP_XCHG_QUICK, ISAKMP_XCHG_ACK_INFO, exchange_name2, NULL };

enum_names exchange_names =
    { ISAKMP_XCHG_NONE, ISAKMP_XCHG_INFO, exchange_name, &exchange_desc2 };

/* Flag BITS */
const char *const flag_bit_names[] = {
	"ISAKMP_FLAG_ENCRYPTION",
	"ISAKMP_FLAG_COMMIT",
	NULL
    };

/* Situation BITS definition for IPsec DOI */

const char *const sit_bit_names[] = {
	"SIT_IDENTITY_ONLY",
	"SIT_SECRECY",
	"SIT_INTEGRITY",
	NULL
    };

/* Protocol IDs (draft-ietf-ipsec-ipsec-doi-08.txt 4.4.1) */

static const char *const protocol_name[] = {
	"PROTO_ISAKMP",
	"PROTO_IPSEC_AH",
	"PROTO_IPSEC_ESP",
	"PROTO_IPCOMP",
    };

enum_names protocol_names =
    { PROTO_ISAKMP, PROTO_IPCOMP, protocol_name, NULL };

/* IPsec ISAKMP transform values */

static const char *const isakmp_transform_name[] = {
	"KEY_IKE",
    };

enum_names isakmp_transformid_names =
    { KEY_IKE, KEY_IKE, isakmp_transform_name, NULL };

/* IPsec AH transform values */

static const char *const ah_transform_name[] = {
	"AH_MD5",
	"AH_SHA",
	"AH_DES",
	"AH_SHA2_256",
	"AH_SHA2_384",
	"AH_SHA2_512",
    };

enum_names ah_transformid_names =
    { AH_MD5, AH_SHA2_512, ah_transform_name, NULL };

/* IPsec ESP transform values */

static const char *const esp_transform_name[] = {
	"ESP_DES_IV64",
	"ESP_DES",
	"ESP_3DES",
	"ESP_RC5",
	"ESP_IDEA",
	"ESP_CAST",
	"ESP_BLOWFISH",
	"ESP_3IDEA",
	"ESP_DES_IV32",
	"ESP_RC4",
	"ESP_NULL",
	"ESP_AES",
    };

enum_names esp_transformid_names =
    { ESP_DES_IV64, ESP_AES, esp_transform_name, NULL };

/* IPCOMP transform values */

static const char *const ipcomp_transform_name[] = {
	"IPCOMP_OUI",
	"IPCOMP_DEFLAT",
	"IPCOMP_LZS",
	"IPCOMP_V42BIS",
    };

enum_names ipcomp_transformid_names =
    { IPCOMP_OUI, IPCOMP_V42BIS, ipcomp_transform_name, NULL };

/* Identification type values */

static const char *const ident_name[] = {
	"ID_IPV4_ADDR",
	"ID_FQDN",
	"ID_USER_FQDN",
	"ID_IPV4_ADDR_SUBNET",
	"ID_IPV6_ADDR",
	"ID_IPV6_ADDR_SUBNET",
	"ID_IPV4_ADDR_RANGE",
	"ID_IPV6_ADDR_RANGE",
	"ID_DER_ASN1_DN",
	"ID_DER_ASN1_GN",
	"ID_KEY_ID",
    };

enum_names ident_names =
    { ID_IPV4_ADDR, ID_KEY_ID, ident_name, NULL };

/* Goal BITs for establishing an SA
 * Note: we drop the POLICY_ prefix so that logs are more concise.
 */

const char *const sa_policy_bit_names[] = {
	"PSK",
	"RSASIG",
	"ENCRYPT",
	"AUTHENTICATE",
	"COMPRESS",
	"TUNNEL",
	"PFS",
	"PASS",
	"DROP",
	NULL
    };

/* Oakley transform attributes
 * oakley_attr_bit_names does double duty: it is used for enum names
 * and bit names.
 */

const char *const oakley_attr_bit_names[] = {
	"OAKLEY_ENCRYPTION_ALGORITHM",
	"OAKLEY_HASH_ALGORITHM",
	"OAKLEY_AUTHENTICATION_METHOD",
	"OAKLEY_GROUP_DESCRIPTION",
	"OAKLEY_GROUP_TYPE",
	"OAKLEY_GROUP_PRIME",
	"OAKLEY_GROUP_GENERATOR_ONE",
	"OAKLEY_GROUP_GENERATOR_TWO",
	"OAKLEY_GROUP_CURVE_A",
	"OAKLEY_GROUP_CURVE_B",
	"OAKLEY_LIFE_TYPE",
	"OAKLEY_LIFE_DURATION",
	"OAKLEY_PRF",
	"OAKLEY_KEY_LENGTH",
	"OAKLEY_FIELD_SIZE",
	"OAKLEY_GROUP_ORDER",
	"OAKLEY_BLOCK_SIZE",
	NULL
    };

static const char *const oakley_var_attr_name[] = {
	"OAKLEY_GROUP_PRIME (variable length)",
	"OAKLEY_GROUP_GENERATOR_ONE (variable length)",
	"OAKLEY_GROUP_GENERATOR_TWO (variable length)",
	"OAKLEY_GROUP_CURVE_A (variable length)",
	"OAKLEY_GROUP_CURVE_B (variable length)",
	NULL,
	"OAKLEY_LIFE_DURATION (variable length)",
	NULL,
	NULL,
	NULL,
	"OAKLEY_GROUP_ORDER (variable length)",
    };

static enum_names oakley_attr_desc_tv = {
    OAKLEY_ENCRYPTION_ALGORITHM + ISAKMP_ATTR_AF_TV,
    OAKLEY_GROUP_ORDER + ISAKMP_ATTR_AF_TV, oakley_attr_bit_names, NULL };

enum_names oakley_attr_names = {
    OAKLEY_GROUP_PRIME, OAKLEY_GROUP_ORDER,
    oakley_var_attr_name, &oakley_attr_desc_tv };

/* for each Oakley attribute, which enum_names describes its values? */
enum_names *oakley_attr_val_descs[] = {
	NULL,			/* (none) */
	&oakley_enc_names,	/* OAKLEY_ENCRYPTION_ALGORITHM */
	&oakley_hash_names,	/* OAKLEY_HASH_ALGORITHM */
	&oakley_auth_names,	/* OAKLEY_AUTHENTICATION_METHOD */
	&oakley_group_names,	/* OAKLEY_GROUP_DESCRIPTION */
	&oakley_group_type_names,/* OAKLEY_GROUP_TYPE */
	NULL,			/* OAKLEY_GROUP_PRIME */
	NULL,			/* OAKLEY_GROUP_GENERATOR_ONE */
	NULL,			/* OAKLEY_GROUP_GENERATOR_TWO */
	NULL,			/* OAKLEY_GROUP_CURVE_A */
	NULL,			/* OAKLEY_GROUP_CURVE_B */
	&oakley_lifetime_names,	/* OAKLEY_LIFE_TYPE */
	NULL,			/* OAKLEY_LIFE_DURATION */
	&oakley_prf_names,	/* OAKLEY_PRF */
	NULL,			/* OAKLEY_KEY_LENGTH */
	NULL,			/* OAKLEY_FIELD_SIZE */
	NULL,			/* OAKLEY_GROUP_ORDER */
    };

/* IPsec DOI attributes (draft-ietf-ipsec-ipsec-doi-08.txt 4.5) */

static const char *const ipsec_attr_name[] = {
	"SA_LIFE_TYPE",
	"SA_LIFE_DURATION",
	"GROUP_DESCRIPTION",
	"ENCAPSULATION_MODE",
	"AUTH_ALGORITHM",
	"KEY_LENGTH",
	"KEY_ROUNDS",
	"COMPRESS_DICT_SIZE",
	"COMPRESS_PRIVATE_ALG",
    };

static const char *const ipsec_var_attr_name[] = {
	"SA_LIFE_DURATION (variable length)",
	NULL,
	NULL,
	NULL,
	NULL,
	NULL,
	NULL,
	"COMPRESS_PRIVATE_ALG (variable length)",
    };

static enum_names ipsec_attr_desc_tv = {
    SA_LIFE_TYPE + ISAKMP_ATTR_AF_TV,
    COMPRESS_PRIVATE_ALG + ISAKMP_ATTR_AF_TV,
    ipsec_attr_name, NULL };

enum_names ipsec_attr_names = {
    SA_LIFE_DURATION, COMPRESS_PRIVATE_ALG,
    ipsec_var_attr_name, &ipsec_attr_desc_tv };

/* for each IPsec attribute, which enum_names describes its values? */
enum_names *ipsec_attr_val_descs[] = {
	NULL,			/* (none) */
	&sa_lifetime_names,	/* SA_LIFE_TYPE */
	NULL,			/* SA_LIFE_DURATION */
	&oakley_group_names,	/* GROUP_DESCRIPTION */
	&enc_mode_names,		/* ENCAPSULATION_MODE */
	&auth_alg_names,		/* AUTH_ALGORITHM */
	NULL,			/* KEY_LENGTH */
	NULL,			/* KEY_ROUNDS */
	NULL,			/* COMPRESS_DICT_SIZE */
	NULL,			/* COMPRESS_PRIVATE_ALG */
    };

/* SA Lifetime Type attribute */

static const char *const sa_lifetime_name[] = {
	"SA_LIFE_TYPE_SECONDS",
	"SA_LIFE_TYPE_KBYTES",
    };

enum_names sa_lifetime_names =
    { SA_LIFE_TYPE_SECONDS, SA_LIFE_TYPE_KBYTES, sa_lifetime_name, NULL };

/* Encapsulation Mode attribute */

static const char *const enc_mode_name[] = {
	"ENCAPSULATION_MODE_TUNNEL",
	"ENCAPSULATION_MODE_TRANSPORT",
    };

enum_names enc_mode_names =
    { ENCAPSULATION_MODE_TUNNEL, ENCAPSULATION_MODE_TRANSPORT, enc_mode_name, NULL };

/* Auth Algorithm attribute */

static const char *const auth_alg_name[] = {
	"unspecified AUTH_ALGORITHM",
	"AUTH_ALGORITHM_HMAC_MD5",
	"AUTH_ALGORITHM_HMAC_SHA1",
	"AUTH_ALGORITHM_DES_MAC",
	"AUTH_ALGORITHM_KPDK",
    };

enum_names
    auth_alg_names =
	{ AUTH_ALGORITHM_HMAC_MD5, AUTH_ALGORITHM_KPDK, auth_alg_name + 1, NULL },
    extended_auth_alg_names =
	{ AUTH_ALGORITHM_NONE, AUTH_ALGORITHM_KPDK, auth_alg_name, NULL };

/* Oakley Lifetime Type attribute */

static const char *const oakley_lifetime_name[] = {
	"OAKLEY_LIFE_SECONDS",
	"OAKLEY_LIFE_KILOBYTES",
    };

enum_names oakley_lifetime_names =
    { OAKLEY_LIFE_SECONDS, OAKLEY_LIFE_KILOBYTES, oakley_lifetime_name, NULL };

/* Oakley PRF attribute (none defined) */

enum_names oakley_prf_names =
    { 1, 0, NULL, NULL };

/* Oakley Encryption Algorithm attribute */

static const char *const oakley_enc_name[] = {
	"OAKLEY_DES_CBC",
	"OAKLEY_IDEA_CBC",
	"OAKLEY_BLOWFISH_CBC",
	"OAKLEY_RC5_R16_B64_CBC",
	"OAKLEY_3DES_CBC",
	"OAKLEY_CAST_CBC",
	"OAKLEY_AES_CBC",
    };

enum_names oakley_enc_names =
    { OAKLEY_DES_CBC, OAKLEY_AES_CBC, oakley_enc_name, NULL };

/* Oakley Hash Algorithm attribute */

static const char *const oakley_hash_name[] = {
	"OAKLEY_MD5",
	"OAKLEY_SHA",
	"OAKLEY_TIGER",
	"OAKLEY_SHA2_256",
	"OAKLEY_SHA2_384",
	"OAKLEY_SHA2_512",
    };

enum_names oakley_hash_names =
    { OAKLEY_MD5, OAKLEY_SHA2_512, oakley_hash_name, NULL };

/* Oakley Authentication Method attribute */

static const char *const oakley_auth_name[] = {
	"OAKLEY_PRESHARED_KEY",
	"OAKLEY_DSS_SIG",
	"OAKLEY_RSA_SIG",
	"OAKLEY_RSA_ENC",
	"OAKLEY_RSA_ENC_REV",
	"OAKLEY_ELGAMAL_ENC",
	"OAKLEY_ELGAMAL_ENC_REV",
    };

enum_names oakley_auth_names =
    { OAKLEY_PRESHARED_KEY, OAKLEY_ELGAMAL_ENC_REV, oakley_auth_name, NULL };

/* Oakley Group Description attribute */

static const char *const oakley_group_name[] = {
	"OAKLEY_GROUP_MODP768",
	"OAKLEY_GROUP_MODP1024",
	"OAKLEY_GROUP_GP155",
	"OAKLEY_GROUP_GP185",
	"OAKLEY_GROUP_MODP1536 (extension)",
    };

enum_names oakley_group_names =
    { OAKLEY_GROUP_MODP768, OAKLEY_GROUP_MODP1536, oakley_group_name, NULL };

/* Oakley Group Type attribute */

static const char *const oakley_group_type_name[] = {
	"OAKLEY_GROUP_TYPE_MODP",
	"OAKLEY_GROUP_TYPE_ECP",
	"OAKLEY_GROUP_TYPE_EC2N",
    };

enum_names oakley_group_type_names =
    { OAKLEY_GROUP_TYPE_MODP, OAKLEY_GROUP_TYPE_EC2N, oakley_group_type_name, NULL };

/* Notify messages -- error types */

static const char *const notification_name[] = {
	"INVALID_PAYLOAD_TYPE",

	"DOI_NOT_SUPPORTED",
	"SITUATION_NOT_SUPPORTED",
	"INVALID_COOKIE",
	"INVALID_MAJOR_VERSION",
	"INVALID_MINOR_VERSION",
	"INVALID_EXCHANGE_TYPE",
	"INVALID_FLAGS",
	"INVALID_MESSAGE_ID",
	"INVALID_PROTOCOL_ID",
	"INVALID_SPI",
	"INVALID_TRANSFORM_ID",
	"ATTRIBUTES_NOT_SUPPORTED",
	"NO_PROPOSAL_CHOSEN",
	"BAD_PROPOSAL_SYNTAX",
	"PAYLOAD_MALFORMED",
	"INVALID_KEY_INFORMATION",
	"INVALID_ID_INFORMATION",
	"INVALID_CERT_ENCODING",
	"INVALID_CERTIFICATE",
	"CERT_TYPE_UNSUPPORTED",
	"INVALID_CERT_AUTHORITY",
	"INVALID_HASH_INFORMATION",
	"AUTHENTICATION_FAILED",
	"INVALID_SIGNATURE",
	"ADDRESS_NOTIFICATION",
	"NOTIFY_SA_LIFETIME",
	"CERTIFICATE_UNAVAILABLE",
	"UNSUPPORTED_EXCHANGE_TYPE",
	"UNEQUAL_PAYLOAD_LENGTHS",
    };

static const char *const notification_status_name[] = {
	"CONNECTED",
    };

static const char *const ipsec_notification_name[] = {
	"IPSEC_RESPONDER_LIFETIME",
	"IPSEC_REPLAY_STATUS",
	"IPSEC_INITIAL_CONTACT",
    };

enum_names notification_names =
    { INVALID_PAYLOAD_TYPE, UNEQUAL_PAYLOAD_LENGTHS,
	notification_name, NULL };

enum_names notification_status_names =
    { CONNECTED, CONNECTED,
	notification_status_name, &notification_names };

enum_names ipsec_notification_names =
    { IPSEC_RESPONDER_LIFETIME, IPSEC_INITIAL_CONTACT,
	ipsec_notification_name, &notification_status_names };


/* socket address family info */

static const char *const af_inet_name[] = {
	"AF_INET",
    };

static const char *const af_inet6_name[] = {
	"AF_INET6",
    };

static enum_names af_names6 = { AF_INET6, AF_INET6, af_inet6_name, NULL };

enum_names af_names = { AF_INET, AF_INET, af_inet_name, &af_names6 };

static ip_address ipv4_any, ipv6_any;
static ip_subnet ipv4_wildcard, ipv6_wildcard;
static ip_subnet ipv4_all, ipv6_all;

struct af_info af_inet4_info = {
	AF_INET,
	"AF_INET",
	sizeof(struct in_addr),
	sizeof(struct sockaddr_in),
	32,
	ID_IPV4_ADDR, ID_IPV4_ADDR_SUBNET, ID_IPV4_ADDR_RANGE,
	&ipv4_any, &ipv4_wildcard, &ipv4_all,
    };

struct af_info af_inet6_info = {
	AF_INET6,
	"AF_INET6",
	sizeof(struct in6_addr),
	sizeof(struct sockaddr_in6),
	128,
	ID_IPV6_ADDR, ID_IPV6_ADDR_SUBNET, ID_IPV6_ADDR_RANGE,
	&ipv6_any, &ipv6_wildcard, &ipv6_all,
    };

const struct af_info *
aftoinfo(int af)
{
    switch (af)
    {
	case AF_INET:
	    return &af_inet4_info;
	case AF_INET6:
	    return &af_inet6_info;
	default:
	    return NULL;
    }
}

/* BIND enumerated types */

#include <arpa/nameser.h>

static const char *const rr_type_name[] = {
	"T_A",	/* 1 host address */
	"T_NS",	/* 2 authoritative server */
	"T_MD",	/* 3 mail destination */
	"T_MF",	/* 4 mail forwarder */
	"T_CNAME",	/* 5 canonical name */
	"T_SOA",	/* 6 start of authority zone */
	"T_MB",	/* 7 mailbox domain name */
	"T_MG",	/* 8 mail group member */
	"T_MR",	/* 9 mail rename name */
	"T_NULL",	/* 10 null resource record */
	"T_WKS",	/* 11 well known service */
	"T_PTR",	/* 12 domain name pointer */
	"T_HINFO",	/* 13 host information */
	"T_MINFO",	/* 14 mailbox information */
	"T_MX",	/* 15 mail routing information */
	"T_TXT",	/* 16 text strings */
	"T_RP",	/* 17 responsible person */
	"T_AFSDB",	/* 18 AFS cell database */
	"T_X25",	/* 19 X_25 calling address */
	"T_ISDN",	/* 20 ISDN calling address */
	"T_RT",	/* 21 router */
	"T_NSAP",	/* 22 NSAP address */
	"T_NSAP_PTR",	/* 23 reverse NSAP lookup (deprecated) */
	"T_SIG",	/* 24 security signature */
	"T_KEY",	/* 25 security key */
	"T_PX",	/* 26 X.400 mail mapping */
	"T_GPOS",	/* 27 geographical position (withdrawn) */
	"T_AAAA",	/* 28 IP6 Address */
	"T_LOC",	/* 29 Location Information */
	"T_NXT",	/* 30 Next Valid Name in Zone */
	"T_EID",	/* 31 Endpoint identifier */
	"T_NIMLOC",	/* 32 Nimrod locator */
	"T_SRV",	/* 33 Server selection */
	"T_ATMA",	/* 34 ATM Address */
	"T_NAPTR",	/* 35 Naming Authority PoinTeR */
	NULL
    };

enum_names rr_type_names = { T_A, T_NAPTR, rr_type_name, NULL };

/* Query type values which do not appear in resource records */
static const char *const rr_qtype_name[] = {
	"T_IXFR",	/* 251 incremental zone transfer */
	"T_AXFR",	/* 252 transfer zone of authority */
	"T_MAILB",	/* 253 transfer mailbox records */
	"T_MAILA",	/* 254 transfer mail agent records */
	"T_ANY",	/* 255 wildcard match */
	NULL
    };

enum_names rr_qtype_names = { T_IXFR, T_ANY, rr_qtype_name, &rr_type_names };

static const char *const rr_class_name[] = {
	"C_IN",	/* 1 the arpa internet */
	NULL
    };

enum_names rr_class_names = { C_IN, C_IN, rr_class_name, NULL };


/* look up enum names in an enum_names */

const char *enum_name(enum_names *ed, unsigned long val)
{
    enum_names	*p;

    for (p = ed; p != NULL; p = p->en_next_range)
	if (p->en_first <= val && val <= p->en_last)
	    return p->en_names[val - p->en_first];
    return NULL;
}

/* find or construct a string to describe an enum value
 * Result may be in STATIC buffer!
 */
const char *
enum_show(enum_names *ed, unsigned long val)
{
    const char *p = enum_name(ed, val);

    if (p == NULL)
    {
	static char buf[12];	/* only one!  I hope that it is big enough */

	snprintf(buf, sizeof(buf), "%lu??", val);
	p = buf;
    }
    return p;
}

/* construct a string to name the bits on in a set
 * Result may be in STATIC buffer!
 */
const char *
bitnamesof(const char *const table[], lset_t val)
{
    static char buf[100];   /* only one!  I hope that it is big enough! */
    char *p = buf;
    lset_t bit;
    const char *const *tp;

    if (val == 0)
	return "none";

    for (tp = table, bit = 01; val != 0; bit <<= 1) {
	if (val & bit) {
	    const char *n = *tp;
	    size_t nl;

	    if (n == NULL || *n == '\0')
	    {
		/* no name for this bit, so use hex */
		static char flagbuf[sizeof("0x80000000")];

		snprintf(flagbuf, sizeof(flagbuf), "0x%lx", bit);
		n = flagbuf;
	    }

	    nl = strlen(n);

	    if (p != buf && p < buf+sizeof(buf) - 1)
		*p++ = '+';

	    if (buf+sizeof(buf) - p > (ptrdiff_t)nl) {
		strcpy(p, n);
		p += nl;
	    }
	    val -= bit;
	}
	if (*tp != NULL)
	    tp++;   /* move on, but not past end */
    }
    *p = '\0';
    return buf;
}

/* test a set by seeing if all bits have names */

bool
testset(const char *const table[], lset_t val)
{
    lset_t bit;
    const char *const *tp;

    for (tp = table, bit = 01; val != 0; bit <<= 1, tp++) {
	const char *n = *tp;

	if (n == NULL || ((val & bit) && *n == '\0'))
	    return FALSE;
	val &= ~bit;
    }
    return TRUE;
}


const char sparse_end[] = "end of sparse names";

/* look up enum names in a sparse_names */
const char *sparse_name(sparse_names sd, unsigned long val)
{
    const struct sparse_name *p;

    for (p = sd; p->name != sparse_end; p++)
	if (p->val == val)
	    return p->name;
    return NULL;
}

/* find or construct a string to describe an sparse value
 * Result may be in STATIC buffer!
 */
const char *
sparse_val_show(sparse_names sd, unsigned long val)
{
    const char *p = sparse_name(sd, val);

    if (p == NULL)
    {
	static char buf[12];	/* only one!  I hope that it is big enough */

	snprintf(buf, sizeof(buf), "%lu??", val);
	p = buf;
    }
    return p;
}

void init_constants(void)
{
    err_t ugh;

    ugh = anyaddr(AF_INET, &ipv4_any);
    passert(ugh == NULL);
    ugh = anyaddr(AF_INET, &ipv6_any);
    passert(ugh == NULL);

    ugh = rangetosubnet(&ipv4_any, &ipv4_any, &ipv4_wildcard);
    passert(ugh == NULL);
    ugh = rangetosubnet(&ipv6_any, &ipv6_any, &ipv6_wildcard);
    passert(ugh == NULL);

    ugh = initsubnet(&ipv4_any, 0, '0', &ipv4_all);
    passert(ugh == NULL);
    ugh = initsubnet(&ipv6_any, 0, '0', &ipv6_all);
    passert(ugh == NULL);
}
