diff options
Diffstat (limited to 'mit-pthreads/net/gethostbyname.c')
| -rw-r--r-- | mit-pthreads/net/gethostbyname.c | 167 |
1 files changed, 0 insertions, 167 deletions
diff --git a/mit-pthreads/net/gethostbyname.c b/mit-pthreads/net/gethostbyname.c deleted file mode 100644 index aaaaf79b31b..00000000000 --- a/mit-pthreads/net/gethostbyname.c +++ /dev/null @@ -1,167 +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: @(#)gethostbyname.c 6.45 (Berkeley) 2/24/91";*/ -static char *rcsid = "$Id$"; -#endif /* LIBC_SCCS and not lint */ - -#include <pthread.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <errno.h> -#include <netdb.h> -#include <netinet/in.h> -#include <sys/socket.h> -#include <resolv.h> -#include "res_internal.h" - -static struct hostent *fake_hostent(const char *hostname, struct in_addr addr, - struct hostent *result, char *buf, - int bufsize, int *errval); -static struct hostent *file_find_name(const char *name, struct hostent *result, - char *buf, int bufsize, int *errval); - -struct hostent *gethostbyname(const char *hostname) -{ - 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 gethostbyname_r(hostname, (struct hostent *) data->buf, - data->buf + sizeof(struct hostent), HOST_BUFSIZE, - &data->errval); -} - -struct hostent *gethostbyname_r(const char *hostname, struct hostent *result, - char *buf, int bufsize, int *errval) -{ - struct in_addr addr; - querybuf qbuf; - const char *p; - int n; - - /* Default failure condition is not a range error and not recoverable. */ - errno = 0; - *errval = NO_RECOVERY; - - /* Check for all-numeric hostname with no trailing dot. */ - if (isdigit(hostname[0])) { - p = hostname; - while (*p && (isdigit(*p) || *p == '.')) - p++; - if (!*p && p[-1] != '.') { - /* Looks like an IP address; convert it. */ - if (inet_aton(hostname, &addr) == -1) { - *errval = HOST_NOT_FOUND; - return NULL; - } - return fake_hostent(hostname, addr, result, buf, bufsize, errval); - } - } - - /* Do the search. */ - n = res_search(hostname, C_IN, T_A, qbuf.buf, sizeof(qbuf)); - if (n >= 0) - return _res_parse_answer(&qbuf, n, 0, result, buf, bufsize, errval); - else if (errno == ECONNREFUSED) - return file_find_name(hostname, result, buf, bufsize, errval); - else - return NULL; -} - -static struct hostent *fake_hostent(const char *hostname, struct in_addr addr, - struct hostent *result, char *buf, - int bufsize, int *errval) -{ - int len = strlen(hostname); - char *name, *addr_ptr; - - if (SP(SP(SP(buf, char, len + 1), addr, 1), char *, 3) > buf + bufsize) { - errno = ERANGE; - return NULL; - } - - /* Copy faked name and address into buffer. */ - strcpy(buf, hostname); - name = buf; - buf = ALIGN(buf + len + 1, addr); - *((struct in_addr *) buf) = addr; - addr_ptr = buf; - buf = ALIGN(buf + sizeof(addr), char *); - ((char **) buf)[0] = addr_ptr; - ((char **) buf)[1] = NULL; - ((char **) buf)[2] = NULL; - - result->h_name = name; - result->h_aliases = ((char **) buf) + 2; - result->h_addrtype = AF_INET; - result->h_length = sizeof(addr); - result->h_addr_list = (char **) buf; - - return result; -} - -static struct hostent *file_find_name(const char *name, struct hostent *result, - char *buf, int bufsize, int *errval) -{ - char **alias; - FILE *fp = NULL; - - pthread_mutex_lock(&host_iterate_lock); - sethostent(0); - while ((result = gethostent_r(result, buf, bufsize, errval)) != NULL) { - /* Check the entry's name and aliases against the given name. */ - if (strcasecmp(result->h_name, name) == 0) - break; - for (alias = result->h_aliases; *alias; alias++) { - if (strcasecmp(*alias, name) == 0) - goto end; /* Josip Gracin */ - } - } -end: - pthread_mutex_unlock(&host_iterate_lock); - if (!result && errno != ERANGE) - *errval = HOST_NOT_FOUND; - return result; -} - |