diff options
Diffstat (limited to 'lib/bind/irs/irs_data.c')
| -rw-r--r-- | lib/bind/irs/irs_data.c | 246 |
1 files changed, 246 insertions, 0 deletions
diff --git a/lib/bind/irs/irs_data.c b/lib/bind/irs/irs_data.c new file mode 100644 index 0000000..ed94614 --- /dev/null +++ b/lib/bind/irs/irs_data.c @@ -0,0 +1,246 @@ +/* + * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC") + * 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 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. + */ + +#if !defined(LINT) && !defined(CODECENTER) +static const char rcsid[] = "$Id: irs_data.c,v 1.7.18.5 2007/08/27 03:34:24 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 <stdlib.h> + +#include "port_after.h" + +#include "irs_data.h" +#undef _res +#if !(__GLIBC__ > 2 || __GLIBC__ == 2 && __GLIBC_MINOR__ >= 3) +#undef h_errno +extern int h_errno; +#endif + +extern struct __res_state _res; + +#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; + } + if (net_data->ho_data != NULL) { + free(net_data->ho_data); + net_data->ho_data = NULL; + } + if (net_data->nw_data != NULL) { + free(net_data->nw_data); + net_data->nw_data = 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 +#ifndef LIBBIND_MUTEX_INITIALIZER +#define LIBBIND_MUTEX_INITIALIZER PTHREAD_MUTEX_INITIALIZER +#endif + static pthread_mutex_t keylock = LIBBIND_MUTEX_INITIALIZER; + struct net_data *net_data; + + if (!once) { + if (pthread_mutex_lock(&keylock) != 0) + return (NULL); + if (!once) { + if (pthread_key_create(&key, net_data_destroy) != 0) { + (void)pthread_mutex_unlock(&keylock); + return (NULL); + } + once = 1; + } + if (pthread_mutex_unlock(&keylock) != 0) + return (NULL); + } + 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 + if (pthread_setspecific(key, net_data) != 0) { + net_data_destroy(net_data); + return (NULL); + } +#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) { + memput(net_data, sizeof (struct net_data)); + 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) { + (*net_data->irs->close)(net_data->irs); + memput(net_data, sizeof (struct net_data)); + return (NULL); + } + + if ((net_data->res->options & RES_INIT) == 0U && + res_ninit(net_data->res) == -1) { + (*net_data->irs->close)(net_data->irs); + memput(net_data, sizeof (struct net_data)); + 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); +} +#else +#ifdef __linux +struct __res_state * +__res_state(void) { + return (&_res); +} +#endif +#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); +#if !(__GLIBC__ > 2 || __GLIBC__ == 2 && __GLIBC_MINOR__ >= 3) + return(&_res.res_h_errno); +#else + return (&h_errno); +#endif +} + +void +__h_errno_set(struct __res_state *res, int err) { + + +#if (__GLIBC__ > 2 || __GLIBC__ == 2 && __GLIBC_MINOR__ >= 3) + res->res_h_errno = err; +#else + h_errno = res->res_h_errno = err; +#endif +} + +#endif /*__BIND_NOSTATIC*/ + +/*! \file */ |
