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
findvc(struct smb_ctx * ctx,struct addrinfo * ai)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
smb_ctx_findvc(struct smb_ctx * ctx)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
smb_ctx_kill(struct smb_ctx * ctx)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 }
146