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-rw-r--r--lib/libc/net/gethostbyht.c261
1 files changed, 261 insertions, 0 deletions
diff --git a/lib/libc/net/gethostbyht.c b/lib/libc/net/gethostbyht.c
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+++ b/lib/libc/net/gethostbyht.c
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+/*-
+ * Copyright (c) 1985, 1988, 1993
+ * The 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.
+ * -
+ * Portions Copyright (c) 1993 by Digital Equipment Corporation.
+ *
+ * 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, and that
+ * the name of Digital Equipment Corporation not be used in advertising or
+ * publicity pertaining to distribution of the document or software without
+ * specific, written prior permission.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
+ * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT
+ * CORPORATION 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.
+ * -
+ * --Copyright--
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)gethostnamadr.c 8.1 (Berkeley) 6/4/93";
+#endif /* LIBC_SCCS and not lint */
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#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 <string.h>
+#include <stdarg.h>
+#include <nsswitch.h>
+#include <arpa/nameser.h> /* XXX */
+#include <resolv.h> /* XXX */
+#include "netdb_private.h"
+
+void
+_sethosthtent(int f, struct hostent_data *hed)
+{
+ if (!hed->hostf)
+ hed->hostf = fopen(_PATH_HOSTS, "r");
+ else
+ rewind(hed->hostf);
+ hed->stayopen = f;
+}
+
+void
+_endhosthtent(struct hostent_data *hed)
+{
+ if (hed->hostf && !hed->stayopen) {
+ (void) fclose(hed->hostf);
+ hed->hostf = NULL;
+ }
+}
+
+static int
+gethostent_p(struct hostent *he, struct hostent_data *hed, int mapped)
+{
+ char *p, *bp, *ep;
+ char *cp, **q;
+ int af, len;
+ char hostbuf[BUFSIZ + 1];
+
+ if (!hed->hostf && !(hed->hostf = fopen(_PATH_HOSTS, "r"))) {
+ h_errno = NETDB_INTERNAL;
+ return -1;
+ }
+ again:
+ if (!(p = fgets(hostbuf, sizeof hostbuf, hed->hostf))) {
+ h_errno = HOST_NOT_FOUND;
+ return -1;
+ }
+ if (*p == '#')
+ goto again;
+ cp = strpbrk(p, "#\n");
+ if (cp != NULL)
+ *cp = '\0';
+ if (!(cp = strpbrk(p, " \t")))
+ goto again;
+ *cp++ = '\0';
+ if (inet_pton(AF_INET6, p, hed->host_addr) > 0) {
+ af = AF_INET6;
+ len = IN6ADDRSZ;
+ } else if (inet_pton(AF_INET, p, hed->host_addr) > 0) {
+ if (mapped) {
+ _map_v4v6_address((char *)hed->host_addr,
+ (char *)hed->host_addr);
+ af = AF_INET6;
+ len = IN6ADDRSZ;
+ } else {
+ af = AF_INET;
+ len = INADDRSZ;
+ }
+ } else {
+ goto again;
+ }
+ hed->h_addr_ptrs[0] = (char *)hed->host_addr;
+ hed->h_addr_ptrs[1] = NULL;
+ he->h_addr_list = hed->h_addr_ptrs;
+ he->h_length = len;
+ he->h_addrtype = af;
+ while (*cp == ' ' || *cp == '\t')
+ cp++;
+ bp = hed->hostbuf;
+ ep = hed->hostbuf + sizeof hed->hostbuf;
+ he->h_name = bp;
+ q = he->h_aliases = hed->host_aliases;
+ if ((p = strpbrk(cp, " \t")) != NULL)
+ *p++ = '\0';
+ len = strlen(cp) + 1;
+ if (ep - bp < len) {
+ h_errno = NO_RECOVERY;
+ return -1;
+ }
+ strlcpy(bp, cp, ep - bp);
+ bp += len;
+ cp = p;
+ while (cp && *cp) {
+ if (*cp == ' ' || *cp == '\t') {
+ cp++;
+ continue;
+ }
+ if (q >= &hed->host_aliases[_MAXALIASES - 1])
+ break;
+ if ((p = strpbrk(cp, " \t")) != NULL)
+ *p++ = '\0';
+ len = strlen(cp) + 1;
+ if (ep - bp < len)
+ break;
+ strlcpy(bp, cp, ep - bp);
+ *q++ = bp;
+ bp += len;
+ cp = p;
+ }
+ *q = NULL;
+ h_errno = NETDB_SUCCESS;
+ return 0;
+}
+
+int
+gethostent_r(struct hostent *he, struct hostent_data *hed)
+{
+ return gethostent_p(he, hed, _res.options & RES_USE_INET6);
+}
+
+struct hostent *
+gethostent(void)
+{
+ struct hostdata *hd;
+
+ if ((hd = __hostdata_init()) == NULL)
+ return NULL;
+ if (gethostent_r(&hd->host, &hd->data) != 0)
+ return NULL;
+ return &hd->host;
+}
+
+int
+_ht_gethostbyname(void *rval, void *cb_data, va_list ap)
+{
+ const char *name;
+ int af;
+ struct hostent *he;
+ struct hostent_data *hed;
+ char **cp;
+ int error;
+
+ name = va_arg(ap, const char *);
+ af = va_arg(ap, int);
+ he = va_arg(ap, struct hostent *);
+ hed = va_arg(ap, struct hostent_data *);
+
+ sethostent_r(0, hed);
+ while ((error = gethostent_p(he, hed, 0)) == 0) {
+ if (he->h_addrtype != af)
+ continue;
+ if (he->h_addrtype == AF_INET &&
+ _res.options & RES_USE_INET6) {
+ _map_v4v6_address(he->h_addr, he->h_addr);
+ he->h_length = IN6ADDRSZ;
+ he->h_addrtype = AF_INET6;
+ }
+ if (strcasecmp(he->h_name, name) == 0)
+ break;
+ for (cp = he->h_aliases; *cp != 0; cp++)
+ if (strcasecmp(*cp, name) == 0)
+ goto found;
+ }
+found:
+ endhostent_r(hed);
+
+ return (error == 0) ? NS_SUCCESS : NS_NOTFOUND;
+}
+
+int
+_ht_gethostbyaddr(void *rval, void *cb_data, va_list ap)
+{
+ const char *addr;
+ int len, af;
+ struct hostent *he;
+ struct hostent_data *hed;
+ int error;
+
+ addr = va_arg(ap, const char *);
+ len = va_arg(ap, int);
+ af = va_arg(ap, int);
+ he = va_arg(ap, struct hostent *);
+ hed = va_arg(ap, struct hostent_data *);
+
+ sethostent_r(0, hed);
+ while ((error = gethostent_p(he, hed, 0)) == 0)
+ if (he->h_addrtype == af && !bcmp(he->h_addr, addr, len)) {
+ if (he->h_addrtype == AF_INET &&
+ _res.options & RES_USE_INET6) {
+ _map_v4v6_address(he->h_addr, he->h_addr);
+ he->h_length = IN6ADDRSZ;
+ he->h_addrtype = AF_INET6;
+ }
+ break;
+ }
+ endhostent_r(hed);
+
+ return (error == 0) ? NS_SUCCESS : NS_NOTFOUND;
+}
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