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/*
* Copyright (c) 1996,1999 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 INTERNET SOFTWARE CONSORTIUM DISCLAIMS
* ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
* CONSORTIUM 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.
*/
#if !defined(LINT) && !defined(CODECENTER)
static const char rcsid[] = "$Id: irs_data.c,v 1.19 2001/08/20 07:08:41 marka Exp $";
#endif
#include "port_before.h"
#ifndef __BIND_NOSTATIC
#include <sys/types.h>
#include <netinet/in.h>
#include <arpa/nameser.h>
#include <resolv.h>
#include <stdio.h>
#include <string.h>
#include <isc/memcluster.h>
#ifdef DO_PTHREADS
#include <pthread.h>
#endif
#include <irs.h>
#include "port_after.h"
#include "irs_data.h"
#undef _res
#undef h_errno
extern struct __res_state _res;
extern int h_errno;
#ifdef DO_PTHREADS
static pthread_key_t key;
static int once = 0;
#else
static struct net_data *net_data;
#endif
void
irs_destroy(void) {
#ifndef DO_PTHREADS
if (net_data != NULL)
net_data_destroy(net_data);
net_data = NULL;
#endif
}
void
net_data_destroy(void *p) {
struct net_data *net_data = p;
res_ndestroy(net_data->res);
if (net_data->gr != NULL) {
(*net_data->gr->close)(net_data->gr);
net_data->gr = NULL;
}
if (net_data->pw != NULL) {
(*net_data->pw->close)(net_data->pw);
net_data->pw = NULL;
}
if (net_data->sv != NULL) {
(*net_data->sv->close)(net_data->sv);
net_data->sv = NULL;
}
if (net_data->pr != NULL) {
(*net_data->pr->close)(net_data->pr);
net_data->pr = NULL;
}
if (net_data->ho != NULL) {
(*net_data->ho->close)(net_data->ho);
net_data->ho = NULL;
}
if (net_data->nw != NULL) {
(*net_data->nw->close)(net_data->nw);
net_data->nw = NULL;
}
if (net_data->ng != NULL) {
(*net_data->ng->close)(net_data->ng);
net_data->ng = NULL;
}
(*net_data->irs->close)(net_data->irs);
memput(net_data, sizeof *net_data);
}
/* applications that need a specific config file other than
* _PATH_IRS_CONF should call net_data_init directly rather than letting
* the various wrapper functions make the first call. - brister
*/
struct net_data *
net_data_init(const char *conf_file) {
#ifdef DO_PTHREADS
static pthread_mutex_t keylock = PTHREAD_MUTEX_INITIALIZER;
struct net_data *net_data;
if (!once) {
pthread_mutex_lock(&keylock);
if (!once++)
pthread_key_create(&key, net_data_destroy);
pthread_mutex_unlock(&keylock);
}
net_data = pthread_getspecific(key);
#endif
if (net_data == NULL) {
net_data = net_data_create(conf_file);
if (net_data == NULL)
return (NULL);
#ifdef DO_PTHREADS
pthread_setspecific(key, net_data);
#endif
}
return (net_data);
}
struct net_data *
net_data_create(const char *conf_file) {
struct net_data *net_data;
net_data = memget(sizeof (struct net_data));
if (net_data == NULL)
return (NULL);
memset(net_data, 0, sizeof (struct net_data));
if ((net_data->irs = irs_gen_acc("", conf_file)) == NULL)
return (NULL);
#ifndef DO_PTHREADS
(*net_data->irs->res_set)(net_data->irs, &_res, NULL);
#endif
net_data->res = (*net_data->irs->res_get)(net_data->irs);
if (net_data->res == NULL)
return (NULL);
if ((net_data->res->options & RES_INIT) == 0 &&
res_ninit(net_data->res) == -1)
return (NULL);
return (net_data);
}
void
net_data_minimize(struct net_data *net_data) {
res_nclose(net_data->res);
}
#ifdef _REENTRANT
struct __res_state *
__res_state(void) {
/* NULL param here means use the default config file. */
struct net_data *net_data = net_data_init(NULL);
if (net_data && net_data->res)
return (net_data->res);
return (&_res);
}
#endif
int *
__h_errno(void) {
/* NULL param here means use the default config file. */
struct net_data *net_data = net_data_init(NULL);
if (net_data && net_data->res)
return (&net_data->res->res_h_errno);
return (&h_errno);
}
void
__h_errno_set(struct __res_state *res, int err) {
h_errno = res->res_h_errno = err;
}
#endif /*__BIND_NOSTATIC*/
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