usr/src/common/smbsrv/smb_inet.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  *
  25  * Copyright 2014 Nexenta Systems, Inc.  All rights reserved.
  26  */
  27
  28 /*
  29  * This file was originally generated using rpcgen.
  30  */
  31
  32 #include <sys/types.h>
  33 #include <sys/socket.h>
  34 #include <netinet/in.h>
  35
  36 #if !defined(_KERNEL)
  37 #include <errno.h>
  38 #include <string.h>
  39 #include <strings.h>
  40 #include <arpa/inet.h>
  41 #else   /* !_KERNEL */
  42 #include <sys/errno.h>
  43 #include <sys/sunddi.h>
  44 /* Don't want the rest of what's in inet/ip.h */
  45 extern char     *inet_ntop(int, const void *, char *, int);
  46 extern int      inet_pton(int, char *, void *);
  47 #endif  /* !_KERNEL */
  48
  49 #include <smbsrv/smb_inet.h>
  50
  51 const struct in6_addr ipv6addr_any = IN6ADDR_ANY_INIT;
  52
  53 boolean_t
  54 smb_inet_equal(smb_inaddr_t *ip1, smb_inaddr_t *ip2)
  55 {
  56         if ((ip1->a_family == AF_INET) &&
  57             (ip2->a_family == AF_INET) &&
  58             (ip1->a_ipv4 == ip2->a_ipv4))
  59                 return (B_TRUE);
  60
  61         if ((ip1->a_family == AF_INET6) &&
  62             (ip2->a_family == AF_INET6) &&
  63             (!memcmp(&ip1->a_ipv6, &ip2->a_ipv6, sizeof (in6_addr_t))))
  64                 return (B_TRUE);
  65         else
  66                 return (B_FALSE);
  67 }
  68
  69 boolean_t
  70 smb_inet_same_subnet(smb_inaddr_t *ip1, smb_inaddr_t *ip2, uint32_t v4mask)
  71 {
  72         if ((ip1->a_family == AF_INET) &&
  73             (ip2->a_family == AF_INET) &&
  74             ((ip1->a_ipv4 & v4mask) == (ip2->a_ipv4 & v4mask)))
  75                 return (B_TRUE);
  76
  77         if ((ip1->a_family == AF_INET6) &&
  78             (ip2->a_family == AF_INET6) &&
  79             (!memcmp(&ip1->a_ipv6, &ip2->a_ipv6, sizeof (in6_addr_t))))
  80                 return (B_TRUE);
  81         else
  82                 return (B_FALSE);
  83 }
  84
  85 boolean_t
  86 smb_inet_iszero(smb_inaddr_t *ipaddr)
  87 {
  88         const void *ipsz = (const void *)&ipv6addr_any;
  89
  90         if ((ipaddr->a_family == AF_INET) &&
  91             (ipaddr->a_ipv4 == 0))
  92                 return (B_TRUE);
  93
  94         if ((ipaddr->a_family == AF_INET6) &&
  95             !memcmp(&ipaddr->a_ipv6, ipsz, sizeof (in6_addr_t)))
  96                 return (B_TRUE);
  97         else
  98                 return (B_FALSE);
  99 }
 100
 101 const char *
 102 smb_inet_ntop(smb_inaddr_t *addr, char *buf, int size)
 103 {
 104         /* Lint avoidance. */
 105 #if !defined(_KERNEL)
 106         size_t sz = (size_t)size;
 107 #else   /* _KERNEL */
 108         int sz = size;
 109
 110         /*
 111          * Until kernel/net/ip/inet_ntop.c is fixed so it
 112          * no longer uses leading zeros printing IPv4 addresses,
 113          * we need to handle IPv4 ourselves.  If we leave the
 114          * leading zeros, Windows clients get errors trying to
 115          * resolve those address strings to names.  After:
 116          * https://www.illumos.org/issues/5980 is fixed,
 117          * this work-around can be removed.
 118          */
 119         if (addr->a_family == AF_INET) {
 120                 uint8_t *p = (void *) &addr->a_ipv4;
 121                 (void) snprintf(buf, size, "%d.%d.%d.%d",
 122                     p[0], p[1], p[2], p[3]);
 123                 return (buf);
 124         }
 125 #endif  /* _KERNEL */
 126
 127         return ((char *)inet_ntop(addr->a_family, addr, buf, sz));
 128 }