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