/*-
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * Copyright (C) 2005 The FreeBSD Project.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef _NETDB_PRIVATE_H_
#define _NETDB_PRIVATE_H_

#include <stdio.h>                              /* XXX: for FILE */

#define NETDB_THREAD_ALLOC(name)                                        \
static struct name name;                                                \
static thread_key_t name##_key;                                         \
static once_t name##_init_once = ONCE_INITIALIZER;                      \
static int name##_thr_keycreated = 0;                                   \
\
static void name##_free(void *);                                        \
\
static void                                                             \
name##_keycreate(void)                                                  \
{                                                                       \
        name##_thr_keycreated =                                         \
            (thr_keycreate(&name##_key, name##_free) == 0);             \
}                                                                       \
\
struct name *                                                           \
__##name##_init(void)                                                   \
{                                                                       \
        struct name *he;                                                \
                                                                        \
        if (thr_main() != 0)                                            \
                return (&name);                                         \
        if (thr_once(&name##_init_once, name##_keycreate) != 0 ||       \
            !name##_thr_keycreated)                                     \
                return (NULL);                                          \
        if ((he = thr_getspecific(name##_key)) != NULL)                 \
                return (he);                                            \
        if ((he = calloc(1, sizeof(*he))) == NULL)                      \
                return (NULL);                                          \
        if (thr_setspecific(name##_key, he) == 0)                       \
                return (he);                                            \
        free(he);                                                       \
        return (NULL);                                                  \
}

#define _MAXALIASES     35
#define _MAXLINELEN     1024
#define _MAXADDRS       35
#define _HOSTBUFSIZE    (8 * 1024)
#define _NETBUFSIZE     1025

struct hostent_data {
        uint32_t host_addr[4];                  /* IPv4 or IPv6 */
        char *h_addr_ptrs[_MAXADDRS + 1];
        char *host_aliases[_MAXALIASES];
        char hostbuf[_HOSTBUFSIZE];
        FILE *hostf;
        int stayopen;
#ifdef YP
        char *yp_domain;
#endif
};

struct netent_data {
        char *net_aliases[_MAXALIASES];
        char netbuf[_NETBUFSIZE];
        FILE *netf;
        int stayopen;
#ifdef YP
        char *yp_domain;
#endif
};

struct protoent_data {
        FILE *fp;
        char *aliases[_MAXALIASES];
        int stayopen;
        char line[_MAXLINELEN + 1];
};

struct hostdata {
        struct hostent host;
        char data[sizeof(struct hostent_data)];
};

struct netdata {
        struct netent net;
        char data[sizeof(struct netent_data)];
};

struct protodata {
        struct protoent proto;
        char data[sizeof(struct protoent_data)];
};

struct hostdata *__hostdata_init(void);
struct hostent *__hostent_init(void);
struct hostent_data *__hostent_data_init(void);
struct netdata *__netdata_init(void);
struct netent_data *__netent_data_init(void);
struct protodata *__protodata_init(void);
struct protoent_data *__protoent_data_init(void);
int __copy_hostent(struct hostent *, struct hostent *, char *, size_t);
int __copy_netent(struct netent *, struct netent *, char *, size_t);
int __copy_protoent(struct protoent *, struct protoent *, char *, size_t);

void __endprotoent_p(struct protoent_data *);
int __getprotoent_p(struct protoent *, struct protoent_data *);
void __setprotoent_p(int, struct protoent_data *);
void _endhostdnsent(void);
void _endhosthtent(struct hostent_data *);
void _endnetdnsent(void);
void _endnethtent(struct netent_data *);
void _map_v4v6_address(const char *, char *);
void _map_v4v6_hostent(struct hostent *, char **, char *);
void _sethostdnsent(int);
void _sethosthtent(int, struct hostent_data *);
void _setnetdnsent(int);
void _setnethtent(int, struct netent_data *);

struct hostent *__dns_getanswer(const char *, int, const char *, int);
int _dns_gethostbyaddr(void *, void *, va_list);
int _dns_gethostbyname(void *, void *, va_list);
int _dns_getnetbyaddr(void *, void *, va_list);
int _dns_getnetbyname(void *, void *, va_list);
int _ht_gethostbyaddr(void *, void *, va_list);
int _ht_gethostbyname(void *, void *, va_list);
int _ht_getnetbyaddr(void *, void *, va_list);
int _ht_getnetbyname(void *, void *, va_list);
int _nis_gethostbyaddr(void *, void *, va_list);
int _nis_gethostbyname(void *, void *, va_list);
int _nis_getnetbyaddr(void *, void *, va_list);
int _nis_getnetbyname(void *, void *, va_list);
#ifdef NS_CACHING
int __proto_id_func(char *, size_t *, va_list, void *);
int __proto_marshal_func(char *, size_t *, void *, va_list, void *);
int __proto_unmarshal_func(char *, size_t, void *, va_list, void *);
#endif

#endif /* _NETDB_PRIVATE_H_ */