diff options
Diffstat (limited to 'mit-pthreads/net/gethostbyaddr.c')
| -rw-r--r-- | mit-pthreads/net/gethostbyaddr.c | 161 |
1 files changed, 0 insertions, 161 deletions
diff --git a/mit-pthreads/net/gethostbyaddr.c b/mit-pthreads/net/gethostbyaddr.c deleted file mode 100644 index f80e47ffd99..00000000000 --- a/mit-pthreads/net/gethostbyaddr.c +++ /dev/null @@ -1,161 +0,0 @@ -/* - * Copyright (c) 1985, 1988 Regents of the University of California. - * 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. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed by the University of - * California, Berkeley and its contributors. - * 4. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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. - */ - -#if defined(LIBC_SCCS) && !defined(lint) -/*static char *sccsid = "from: @(#)gethostbyaddr.c 6.45 (Berkeley) 2/24/91";*/ -static char *rcsid = "$Id$"; -#endif /* LIBC_SCCS and not lint */ - - -#include <pthread.h> -#include <stdio.h> -#include <string.h> -#include <stdlib.h> -#include <netdb.h> -#include <netinet/in.h> -#include <resolv.h> -#include <netinet/in.h> -#include <errno.h> -#include <sys/socket.h> -#include "res_internal.h" - -static struct hostent *file_find_addr(const char *addr, int len, int type, - struct hostent *result, char *buf, - int bufsize, int *errval); - -struct hostent *gethostbyaddr(const char *addr, int len, int type) -{ - struct res_data *data = _res_init(); - - if (!data) - return NULL; - if (!data->buf) { - data->buf = malloc(sizeof(struct hostent) + HOST_BUFSIZE); - if (!data->buf) { - errno = 0; - data->errval = NO_RECOVERY; - return NULL; - } - } - return gethostbyaddr_r(addr, len, type, (struct hostent *) data->buf, - data->buf + sizeof(struct hostent), HOST_BUFSIZE, - &data->errval); -} - -struct hostent *gethostbyaddr_r(const char *addr, int len, int type, - struct hostent *result, char *buf, int bufsize, - int *errval) -{ - struct res_data *data; - querybuf qbuf; - char lookups[MAXDNSLUS], addrbuf[MAXDNAME], *abuf; - struct hostent *hp; - int n, i; - - /* Default failure condition is not a range error and not recoverable. */ - errno = 0; - *errval = NO_RECOVERY; - - data = _res_init(); - if (!data) - return NULL; - - if (type != AF_INET) - return NULL; - sprintf(addrbuf, "%u.%u.%u.%u.in-addr.arpa", - (unsigned)addr[3] & 0xff, (unsigned)addr[2] & 0xff, - (unsigned)addr[1] & 0xff, (unsigned)addr[0] & 0xff); - - memcpy(lookups, data->state.lookups, sizeof(lookups)); - if (*lookups == 0) - strncpy(lookups, "bf", sizeof(lookups)); - - hp = NULL; - for (i = 0; i < MAXDNSLUS && hp == NULL && lookups[i]; i++) { - switch (lookups[i]) { - case 'b': - - /* Allocate space for a one-item list of addresses. */ - abuf = SP(SP(buf, char *, 2), struct in_addr, 1); - if (abuf > buf + bufsize) { - errno = ERANGE; - return NULL; - } - - /* Perform and parse the query. */ - n = res_query(addrbuf, C_IN, T_PTR, (char *)&qbuf, sizeof(qbuf)); - if (n < 0) - break; - hp = _res_parse_answer(&qbuf, n, 1, result, abuf, - bufsize - (abuf - buf), errval); - if (hp == NULL) - break; - - /* Fill in our own address list. */ - result->h_addrtype = type; - result->h_length = len; - result->h_addr_list = (char **) ALIGN(buf, char *); - result->h_addr_list[0] = ALIGN(&result->h_addr_list[2], - struct in_addr); - result->h_addr_list[1] = NULL; - break; - - case 'f': - hp = file_find_addr(addr, len, type, result, buf, bufsize, errval); - break; - } - } - - return hp; -} - -static struct hostent *file_find_addr(const char *addr, int len, int type, - struct hostent *result, char *buf, - int bufsize, int *errval) -{ - FILE *fp = NULL; - - pthread_mutex_lock(&host_iterate_lock); - sethostent(0); - while ((result = gethostent_r(result, buf, bufsize, errval)) != NULL) { - /* Check the entry against the given address. */ - if (result->h_addrtype == type && - memcmp(result->h_addr, addr, len) == 0) - break; - } - pthread_mutex_unlock(&host_iterate_lock); - if (!result && errno != ERANGE) - *errval = HOST_NOT_FOUND; - return result; -} - |