usr/src/lib/libsmbfs/smb/nb_net.c

   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 }