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 * Functions called by the IO deamon (IOD).
31 * Here in the library to simplify testing.
32 */
33
34 #include <errno.h>
35 #include <fcntl.h>
36 #include <stdio.h>
37 #include <string.h>
38 #include <stdlib.h>
39 #include <unistd.h>
40 #include <libintl.h>
41
42 #include <sys/byteorder.h>
43 #include <sys/types.h>
44 #include <sys/fcntl.h>
45 #include <sys/ioctl.h>
46 #include <sys/time.h>
47 #include <sys/socket.h>
48
49 #include <netinet/in.h>
50 #include <netinet/tcp.h>
51 #include <arpa/inet.h>
52
53 #include <netsmb/smb.h>
54 #include <netsmb/smb_lib.h>
55 #include <netsmb/netbios.h>
56 #include <netsmb/nb_lib.h>
57 #include <netsmb/smb_dev.h>
58
59 #include "charsets.h"
60 #include "private.h"
61
62 /*
63 * The user agent (smbiod) calls smb_iod_connect for the first
64 * connection to some server, and if that succeeds, will start a
65 * thread running this function, passing the smb_ctx_t
66 *
67 * This thread now enters the driver and stays there, reading
68 * network responses as long as the connection is alive.
69 */
70 int
smb_iod_work(smb_ctx_t * ctx)71 smb_iod_work(smb_ctx_t *ctx)
72 {
73 smbioc_ssn_work_t *work = &ctx->ct_work;
74 int err = 0;
75
76 DPRINT("server: %s", ctx->ct_srvname);
77
78 /*
79 * This is the reader / reconnect loop.
80 *
81 * We could start with state "idle", but
82 * we know someone wants a connection to
83 * this server, so start in "vcactive".
84 *
85 * XXX: Add some syslog calls in here?
86 */
87
88 for (;;) {
89
90 DPRINT("state: %s",
91 smb_iod_state_name(work->wk_out_state));
92
93 switch (work->wk_out_state) {
94 case SMBIOD_ST_IDLE:
95 /*
96 * Wait for driver requests to arrive
97 * for this VC, then return here.
98 * Next state is normally RECONNECT.
99 */
100 DPRINT("Call _ioc_idle...");
101 if (nsmb_ioctl(ctx->ct_dev_fd,
102 SMBIOC_IOD_IDLE, work) == -1) {
103 err = errno;
104 DPRINT("ioc_idle: err %d", err);
105 goto out;
106 }
107 DPRINT("Ret. from _ioc_idle");
108 continue;
109
110 case SMBIOD_ST_RECONNECT:
111 DPRINT("Call _iod_connect...");
112 err = smb_iod_connect(ctx);
113 if (err == 0)
114 continue;
115 DPRINT("iod_connect: err %d", err);
116 /*
117 * If the error was EAUTH, retry is
118 * not likely to succeed either, so
119 * just exit this thread. The user
120 * will need to run smbutil to get
121 * a new thread with new auth info.
122 */
123 if (err == EAUTH) {
124 DPRINT("iod_connect: EAUTH (give up)");
125 goto out;
126 }
127 /*
128 * Reconnect failed. Notify any requests
129 * that we're not connected, and delay.
130 * Next state will be IDLE or RECONNECT.
131 */
132 DPRINT("Call _iod_rcfail...");
133 if (nsmb_ioctl(ctx->ct_dev_fd,
134 SMBIOC_IOD_RCFAIL, work) == -1) {
135 err = errno;
136 DPRINT("iod_rcfail: err %d", err);
137 goto out;
138 }
139 continue;
140
141 case SMBIOD_ST_AUTHOK:
142 /*
143 * This is where we enter the driver and
144 * stay there. While the connection is up
145 * the VC will have SMBIOD_ST_VCACTIVE
146 */
147 DPRINT("Call _iod_work...");
148 if (nsmb_ioctl(ctx->ct_dev_fd,
149 SMBIOC_IOD_WORK, work) == -1) {
150 err = errno;
151 DPRINT("iod_work: err %d", err);
152 goto out;
153 }
154 DPRINT("Ret. from _ioc_work");
155 continue;
156
157 case SMBIOD_ST_DEAD:
158 DPRINT("got state=DEAD");
159 err = 0;
160 goto out;
161
162 default:
163 DPRINT("Unexpected state: %d (%s)",
164 work->wk_out_state,
165 smb_iod_state_name(work->wk_out_state));
166 err = EFAULT;
167 goto out;
168 }
169 }
170
171 out:
172 if (ctx->ct_dev_fd != -1) {
173 nsmb_close(ctx->ct_dev_fd);
174 ctx->ct_dev_fd = -1;
175 }
176
177 return (err);
178 }
179