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 /*
  23  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  *
  26  * Copyright 2018 Nexenta Systems, Inc.  All rights reserved.
  27  */
  28 
  29 /*
  30  * Find existing an VC given a list of addresses.
  31  */
  32 
  33 #include <errno.h>
  34 #include <stdio.h>
  35 #include <string.h>
  36 #include <strings.h>
  37 #include <stdlib.h>
  38 #include <unistd.h>
  39 #include <netdb.h>
  40 #include <libintl.h>
  41 #include <xti.h>
  42 #include <assert.h>
  43 
  44 #include <sys/types.h>
  45 #include <sys/time.h>
  46 #include <sys/byteorder.h>
  47 #include <sys/socket.h>
  48 #include <sys/fcntl.h>
  49 
  50 #include <netinet/in.h>
  51 #include <netinet/tcp.h>
  52 #include <arpa/inet.h>
  53 
  54 #include <netsmb/smb.h>
  55 #include <netsmb/smb_lib.h>
  56 #include <netsmb/netbios.h>
  57 #include <netsmb/nb_lib.h>
  58 #include <netsmb/smb_dev.h>
  59 
  60 #include "charsets.h"
  61 #include "private.h"
  62 
  63 /*
  64  * Ask the driver if it has a VC with this IP address.
  65  */
  66 static int
  67 findvc(struct smb_ctx *ctx, struct addrinfo *ai)
  68 {
  69         smbioc_ossn_t *ssn = &ctx->ct_ssn;
  70 
  71         /*
  72          * Copy the passed address into ssn_srvaddr,
  73          * but first sanity-check lengths.  Also,
  74          * zero it first to avoid trailing junk.
  75          */
  76         if (ai->ai_addrlen > sizeof (ssn->ssn_srvaddr))
  77                 return (EINVAL);
  78         bzero(&ssn->ssn_srvaddr, sizeof (ssn->ssn_srvaddr));
  79         bcopy(ai->ai_addr, &ssn->ssn_srvaddr, ai->ai_addrlen);
  80 
  81         if (nsmb_ioctl(ctx->ct_dev_fd, SMBIOC_SSN_FIND, ssn) == -1)
  82                 return (errno);
  83 
  84         return (0);
  85 }
  86 
  87 /*
  88  * Find (and reuse) an existing VC.
  89  * See also: newvc.c
  90  */
  91 int
  92 smb_ctx_findvc(struct smb_ctx *ctx)
  93 {
  94         struct addrinfo *ai;
  95         int err;
  96 
  97         /* Should already have the address list. */
  98         if ((ctx->ct_flags & SMBCF_RESOLVED) == 0)
  99                 return (EINVAL);
 100 
 101         if (ctx->ct_dev_fd < 0) {
 102                 if ((err = smb_ctx_gethandle(ctx)))
 103                         return (err);
 104         }
 105 
 106         for (ai = ctx->ct_addrinfo; ai; ai = ai->ai_next) {
 107 
 108                 switch (ai->ai_family) {
 109 
 110                 case AF_INET:
 111                 case AF_INET6:
 112                 case AF_NETBIOS:
 113                         err = findvc(ctx, ai);
 114                         break;
 115 
 116                 default:
 117                         DPRINT("skipped family %d", ai->ai_family);
 118                         err = EPROTONOSUPPORT;
 119                         break;
 120                 }
 121 
 122                 if (err == 0) {
 123                         /* re-use an existing VC */
 124                         return (0);
 125                 }
 126         }
 127 
 128         return (ENOENT);
 129 }
 130 
 131 /*
 132  * Forcibly disconnect the current session, even if
 133  * there are others using it!  This is used by the
 134  * SMB server netlogon when it wants to setup a new
 135  * logon session and does not want any re-use.
 136  */
 137 int
 138 smb_ctx_kill(struct smb_ctx *ctx)
 139 {
 140 
 141         if (nsmb_ioctl(ctx->ct_dev_fd, SMBIOC_SSN_KILL, NULL) == -1)
 142                 return (errno);
 143 
 144         return (0);
 145 }