usr/src/uts/common/fs/smbclnt/netsmb/smb_tran.c

   1 /*
   2  * Copyright (c) 2000-2001 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  * Selected code from smb_conn.c
  33  */
  34
  35 /*
  36  * Helper functions for smb_trantcp.c
  37  * (and maybe future transports)
  38  */
  39
  40 #include <sys/param.h>
  41 #include <sys/systm.h>
  42 #include <sys/kmem.h>
  43 #include <sys/cmn_err.h>
  44
  45 #include <netinet/in.h>
  46 #include <netinet/tcp.h>
  47
  48 #include <netsmb/smb_osdep.h>
  49 #include <netsmb/netbios.h>
  50
  51 #include <netsmb/smb.h>
  52 #include <netsmb/smb_conn.h>
  53 #include <netsmb/smb_subr.h>
  54 #include <netsmb/smb_tran.h>
  55
  56 /*
  57  * Return the length of a sockaddr structure.
  58  * Only needs to handle the address formats
  59  * used by smb_dup_sockaddr.
  60  */
  61 static size_t
  62 SA_LEN(struct sockaddr *sa)
  63 {
  64         size_t len;
  65
  66         switch (sa->sa_family) {
  67         case AF_INET:
  68                 len = sizeof (struct sockaddr_in);
  69                 break;
  70         case AF_INET6:
  71                 len = sizeof (struct sockaddr_in6);
  72                 break;
  73         case AF_NETBIOS:
  74                 len = sizeof (struct sockaddr_nb);
  75                 break;
  76         default:
  77                 SMBSDEBUG("invalid address family %d\n", sa->sa_family);
  78                 len = sizeof (struct sockaddr);
  79                 break;
  80         }
  81
  82         return (len);
  83 }
  84
  85 /*
  86  * Compare two sockaddr contents
  87  * Return zero if identical.
  88  */
  89 int
  90 smb_cmp_sockaddr(struct sockaddr *a1, struct sockaddr *a2)
  91 {
  92         size_t l1, l2;
  93
  94         l1 = SA_LEN(a1);
  95         l2 = SA_LEN(a2);
  96
  97         if (l1 != l2)
  98                 return (-1);
  99
 100         return (bcmp(a1, a2, l1));
 101 }
 102
 103 /*
 104  * Copy a socket address of varying size.
 105  */
 106 struct sockaddr *
 107 smb_dup_sockaddr(struct sockaddr *sa)
 108 {
 109         struct sockaddr *sa2;
 110         size_t len;
 111
 112         /* Get the length (varies per family) */
 113         len = SA_LEN(sa);
 114
 115         sa2 = kmem_alloc(len, KM_SLEEP);
 116         if (sa2)
 117                 bcopy(sa, sa2, len);
 118
 119         return (sa2);
 120 }
 121
 122 void
 123 smb_free_sockaddr(struct sockaddr *sa)
 124 {
 125         size_t len;
 126
 127         /* Get the length (varies per family) */
 128         len = SA_LEN(sa);
 129
 130         kmem_free(sa, len);
 131 }