/*	$NetBSD: netdb.h,v 1.5 2022/09/23 12:15:34 christos Exp $	*/

/*
 * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
 *
 * SPDX-License-Identifier: MPL-2.0
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0.  If a copy of the MPL was not distributed with this
 * file, you can obtain one at https://mozilla.org/MPL/2.0/.
 *
 * See the COPYRIGHT file distributed with this work for additional
 * information regarding copyright ownership.
 */

#ifndef NETDB_H
#define NETDB_H 1

#include <stddef.h>
#include <winsock2.h>

/*
 * Define if <netdb.h> does not declare struct addrinfo.
 */

#if _MSC_VER < 1600
struct addrinfo {
	int ai_flags;		  /* AI_PASSIVE, AI_CANONNAME */
	int ai_family;		  /* PF_xxx */
	int ai_socktype;	  /* SOCK_xxx */
	int ai_protocol;	  /* 0 or IPPROTO_xxx for IPv4 and
				   * IPv6 */
	size_t ai_addrlen;	  /* Length of ai_addr */
	char *ai_canonname;	  /* Canonical name for hostname */
	struct sockaddr *ai_addr; /* Binary address */
	struct addrinfo *ai_next; /* Next structure in linked list */
};
#endif /* if _MSC_VER < 1600 */

/*
 * Undefine all \#defines we are interested in as <netdb.h> may or may not have
 * defined them.
 */

/*
 * Error return codes from gethostbyname() and gethostbyaddr()
 * (left in extern int h_errno).
 */

#undef NETDB_INTERNAL
#undef NETDB_SUCCESS
#undef HOST_NOT_FOUND
#undef TRY_AGAIN
#undef NO_RECOVERY
#undef NO_DATA
#undef NO_ADDRESS

#define NETDB_INTERNAL -1 /* see errno */
#define NETDB_SUCCESS  0  /* no problem */
#define HOST_NOT_FOUND 1  /* Authoritative Answer Host not found */
#define TRY_AGAIN      2  /* Non-Authoritative Host not found, or SERVERFAIL */
#define NO_RECOVERY    3  /* Non recoverable errors, FORMERR, REFUSED, NOTIMP */
#define NO_DATA	       4  /* Valid name, no data record of requested type */
#define NO_ADDRESS     NO_DATA /* no address, look for MX record */

/*
 * Error return codes from getaddrinfo()
 */

#undef EAI_ADDRFAMILY
#undef EAI_AGAIN
#undef EAI_BADFLAGS
#undef EAI_FAIL
#undef EAI_FAMILY
#undef EAI_MEMORY
#undef EAI_NODATA
#undef EAI_NONAME
#undef EAI_SERVICE
#undef EAI_SOCKTYPE
#undef EAI_SYSTEM
#undef EAI_BADHINTS
#undef EAI_PROTOCOL
#undef EAI_MAX

#define EAI_ADDRFAMILY 1  /* address family for hostname not supported */
#define EAI_AGAIN      2  /* temporary failure in name resolution */
#define EAI_BADFLAGS   3  /* invalid value for ai_flags */
#define EAI_FAIL       4  /* non-recoverable failure in name resolution */
#define EAI_FAMILY     5  /* ai_family not supported */
#define EAI_MEMORY     6  /* memory allocation failure */
#define EAI_NODATA     7  /* no address associated with hostname */
#define EAI_NONAME     8  /* hostname nor servname provided, or not known */
#define EAI_SERVICE    9  /* servname not supported for ai_socktype */
#define EAI_SOCKTYPE   10 /* ai_socktype not supported */
#define EAI_SYSTEM     11 /* system error returned in errno */
#define EAI_BADHINTS   12
#define EAI_PROTOCOL   13
#define EAI_MAX	       14

/*
 * Flag values for getaddrinfo()
 */
#undef AI_PASSIVE
#undef AI_CANONNAME
#undef AI_NUMERICHOST

#define AI_PASSIVE     0x00000001
#define AI_CANONNAME   0x00000002
#define AI_NUMERICHOST 0x00000004

/*
 * Flag values for getipnodebyname()
 */
#undef AI_V4MAPPED
#undef AI_ALL
#undef AI_ADDRCONFIG
#undef AI_DEFAULT

#define AI_V4MAPPED   0x00000008
#define AI_ALL	      0x00000010
#define AI_ADDRCONFIG 0x00000020
#define AI_DEFAULT    (AI_V4MAPPED | AI_ADDRCONFIG)

/*
 * Constants for getnameinfo()
 */
#undef NI_MAXHOST
#undef NI_MAXSERV

#define NI_MAXHOST 1025
#define NI_MAXSERV 32

/*
 * Flag values for getnameinfo()
 */
#undef NI_NOFQDN
#undef NI_NUMERICHOST
#undef NI_NAMEREQD
#undef NI_NUMERICSERV
#undef NI_DGRAM
#undef NI_NUMERICSCOPE

#define NI_NOFQDN	0x00000001
#define NI_NUMERICHOST	0x00000002
#define NI_NAMEREQD	0x00000004
#define NI_NUMERICSERV	0x00000008
#define NI_DGRAM	0x00000010
#define NI_NUMERICSCOPE 0x00000020 /*2553bis-00*/

/*
 * Structures for getrrsetbyname()
 */
struct rdatainfo {
	unsigned int rdi_length;
	unsigned char *rdi_data;
};

struct rrsetinfo {
	unsigned int rri_flags;
	int rri_rdclass;
	int rri_rdtype;
	unsigned int rri_ttl;
	unsigned int rri_nrdatas;
	unsigned int rri_nsigs;
	char *rri_name;
	struct rdatainfo *rri_rdatas;
	struct rdatainfo *rri_sigs;
};

/*
 * Flags for getrrsetbyname()
 */
#define RRSET_VALIDATED 0x00000001
/* Set was dnssec validated */

/*
 * Return codes for getrrsetbyname()
 */
#define ERRSET_SUCCESS	0
#define ERRSET_NOMEMORY 1
#define ERRSET_FAIL	2
#define ERRSET_INVAL	3

#endif /* NETDB_H */