diff options
Diffstat (limited to 'lib/libc/net/getnetnamadr.c')
| -rw-r--r-- | lib/libc/net/getnetnamadr.c | 201 |
1 files changed, 201 insertions, 0 deletions
diff --git a/lib/libc/net/getnetnamadr.c b/lib/libc/net/getnetnamadr.c new file mode 100644 index 0000000..eb8c9ae --- /dev/null +++ b/lib/libc/net/getnetnamadr.c @@ -0,0 +1,201 @@ +/*- + * Copyright (c) 1994, Garrett Wollman + * + * 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 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. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include "namespace.h" +#include "reentrant.h" +#include <sys/param.h> +#include <sys/socket.h> +#include <netinet/in.h> +#include <arpa/inet.h> +#include <netdb.h> +#include <stdio.h> +#include <ctype.h> +#include <stdlib.h> +#include <string.h> +#include <stdarg.h> +#include <nsswitch.h> +#include "un-namespace.h" +#include "netdb_private.h" + +extern int _ht_getnetbyname(void *, void *, va_list); +extern int _dns_getnetbyname(void *, void *, va_list); +extern int _nis_getnetbyname(void *, void *, va_list); +extern int _ht_getnetbyaddr(void *, void *, va_list); +extern int _dns_getnetbyaddr(void *, void *, va_list); +extern int _nis_getnetbyaddr(void *, void *, va_list); + +/* Network lookup order if nsswitch.conf is broken or nonexistant */ +static const ns_src default_src[] = { + { NSSRC_FILES, NS_SUCCESS }, + { NSSRC_DNS, NS_SUCCESS }, + { 0 } +}; + +static struct netdata netdata; +static thread_key_t netdata_key; +static once_t netdata_init_once = ONCE_INITIALIZER; +static int netdata_thr_keycreated = 0; + +static void +netdata_free(void *ptr) +{ + struct netdata *nd = ptr; + + if (nd == NULL) + return; + nd->data.stayopen = 0; + _endnethtent(&nd->data); + free(nd); +} + +static void +netdata_keycreate(void) +{ + netdata_thr_keycreated = + (thr_keycreate(&netdata_key, netdata_free) == 0); +} + +struct netdata * +__netdata_init(void) +{ + struct netdata *nd; + + if (thr_main() != 0) + return &netdata; + if (thr_once(&netdata_init_once, netdata_keycreate) != 0 || + !netdata_thr_keycreated) + return NULL; + if ((nd = thr_getspecific(netdata_key)) != NULL) + return nd; + if ((nd = calloc(1, sizeof(*nd))) == NULL) + return NULL; + if (thr_setspecific(netdata_key, nd) == 0) + return nd; + free(nd); + return NULL; +} + +int +getnetbyname_r(const char *name, struct netent *ne, struct netent_data *ned) +{ + int rval; + + + static const ns_dtab dtab[] = { + NS_FILES_CB(_ht_getnetbyname, NULL) + { NSSRC_DNS, _dns_getnetbyname, NULL }, + NS_NIS_CB(_nis_getnetbyname, NULL) /* force -DHESIOD */ + { 0 } + }; + + rval = _nsdispatch(NULL, dtab, NSDB_NETWORKS, "getnetbyname", + default_src, name, ne, ned); + + return (rval == NS_SUCCESS) ? 0 : -1; +} + +int +getnetbyaddr_r(uint32_t addr, int af, struct netent *ne, + struct netent_data *ned) +{ + int rval; + + static const ns_dtab dtab[] = { + NS_FILES_CB(_ht_getnetbyaddr, NULL) + { NSSRC_DNS, _dns_getnetbyaddr, NULL }, + NS_NIS_CB(_nis_getnetbyaddr, NULL) /* force -DHESIOD */ + { 0 } + }; + + rval = _nsdispatch(NULL, dtab, NSDB_NETWORKS, "getnetbyaddr", + default_src, addr, af, ne, ned); + + return (rval == NS_SUCCESS) ? 0 : -1; +} + +void +setnetent_r(int stayopen, struct netent_data *ned) +{ + _setnethtent(stayopen, ned); + _setnetdnsent(stayopen); +} + +void +endnetent_r(struct netent_data *ned) +{ + _endnethtent(ned); + _endnetdnsent(); +} + +struct netent * +getnetbyname(const char *name) +{ + struct netdata *nd; + + if ((nd = __netdata_init()) == NULL) + return NULL; + if (getnetbyname_r(name, &nd->net, &nd->data) != 0) + return NULL; + return &nd->net; +} + +struct netent * +#if __LONG_BIT == 64 +getnetbyaddr(u_long addr, int af) /* ABI compatibility */ +#else +getnetbyaddr(uint32_t addr, int af) +#endif +{ + struct netdata *nd; + + if ((nd = __netdata_init()) == NULL) + return NULL; + if (getnetbyaddr_r((uint32_t)addr, af, &nd->net, &nd->data) != 0) + return NULL; + return &nd->net; +} + +void +setnetent(int stayopen) +{ + struct netdata *nd; + + if ((nd = __netdata_init()) == NULL) + return; + setnetent_r(stayopen, &nd->data); +} + +void +endnetent(void) +{ + struct netdata *nd; + + if ((nd = __netdata_init()) == NULL) + return; + endnetent_r(&nd->data); +} |
