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      1 /*
      2  * Copyright (c) 2000, Boris Popov
      3  * All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  * 3. All advertising materials mentioning features or use of this software
     14  *    must display the following acknowledgement:
     15  *    This product includes software developed by Boris Popov.
     16  * 4. Neither the name of the author nor the names of any co-contributors
     17  *    may be used to endorse or promote products derived from this software
     18  *    without specific prior written permission.
     19  *
     20  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     30  * SUCH DAMAGE.
     31  *
     32  * $Id: nb_net.c,v 1.8 2004/03/19 01:49:47 lindak Exp $
     33  */
     34 
     35 #include <sys/param.h>
     36 #include <sys/socket.h>
     37 #include <sys/ioctl.h>
     38 #include <sys/sockio.h>
     39 #include <net/if.h>
     40 #include <ctype.h>
     41 #include <errno.h>
     42 #include <stdlib.h>
     43 #include <string.h>
     44 #include <strings.h>
     45 #include <stdio.h>
     46 #include <unistd.h>
     47 #include <netdb.h>
     48 #include <nss_dbdefs.h>
     49 
     50 #include <err.h>
     51 
     52 #include <netsmb/netbios.h>
     53 #include <netsmb/smb_lib.h>
     54 #include <netsmb/nb_lib.h>
     55 #include "private.h"
     56 
     57 /*
     58  * General networking stuff, in spite of the names
     59  * that imply they're specific to NetBIOS.
     60  */
     61 
     62 int
     63 nb_resolvehost_in(const char *name, struct in_addr *ia)
     64 {
     65 	char  he_buf[NSS_BUFLEN_HOSTS];
     66 	struct hostent he, *h;
     67 	int err;
     68 
     69 	h = gethostbyname_r(name, &he, he_buf, sizeof (he_buf), &err);
     70 	if (h == NULL) {
     71 #ifdef DEBUG
     72 		warnx("can't get server address `%s': ", name);
     73 #endif
     74 		return (ENETDOWN);
     75 	}
     76 	if (h->h_addrtype != AF_INET) {
     77 #ifdef DEBUG
     78 		warnx("address for `%s' is not in the AF_INET family", name);
     79 #endif
     80 		return (EAFNOSUPPORT);
     81 	}
     82 	if (h->h_length != 4) {
     83 #ifdef DEBUG
     84 		warnx("address for `%s' has invalid length", name);
     85 #endif
     86 		return (EAFNOSUPPORT);
     87 	}
     88 
     89 	memcpy(ia, h->h_addr, sizeof (*ia));
     90 	return (0);
     91 }
     92