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 (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
24 */
25
26 /*
27 * Client-side interface to the IO Daemon (IOD)
28 */
29
30 #include <errno.h>
31 #include <fcntl.h>
32 #include <stdio.h>
33 #include <string.h>
34 #include <stdlib.h>
35 #include <unistd.h>
36 #include <netdb.h>
37 #include <libintl.h>
38 #include <door.h>
39
40 #include <sys/byteorder.h>
41 #include <sys/types.h>
42 #include <sys/fcntl.h>
43 #include <sys/ioctl.h>
44 #include <sys/time.h>
45 #include <sys/socket.h>
46
47 #include <netinet/in.h>
48 #include <netinet/tcp.h>
49 #include <arpa/inet.h>
50
51 #include <netsmb/smb_lib.h>
52 #include <netsmb/netbios.h>
53 #include <netsmb/nb_lib.h>
54 #include <netsmb/smb_dev.h>
55
56 #include <assert.h>
57
58 #include "charsets.h"
59 #include "private.h"
60
61 /*
62 * This is constant for the life of a process,
63 * and initialized at startup, so no locks.
64 */
65 static char door_path[64];
66 static int iod_start_timeout = 10; /* seconds */
67
68 char *
smb_iod_door_path(void)69 smb_iod_door_path(void)
70 {
71 uid_t uid;
72 int x;
73
74 if (door_path[0] == '\0') {
75 uid = getuid();
76 x = snprintf(door_path, sizeof (door_path),
77 SMBIOD_USR_DOOR, uid);
78 assert(x <= sizeof (door_path));
79 }
80
81 return (door_path);
82 }
83
84 /*
85 * Open the door (client side) and
86 * find out if the service is there.
87 */
88 int
smb_iod_open_door(int * fdp)89 smb_iod_open_door(int *fdp)
90 {
91 door_arg_t da;
92 char *path;
93 int fd, rc;
94 int err = 0;
95
96 path = smb_iod_door_path();
97 fd = open(path, O_RDONLY, 0);
98 if (fd < 0)
99 return (errno);
100
101 /*
102 * Make sure the IOD is running.
103 * Pass NULL args.
104 */
105 memset(&da, 0, sizeof (da));
106 da.rbuf = (void *) &err;
107 da.rsize = sizeof (err);
108 rc = door_call(fd, &da);
109 if (rc < 0) {
110 err = errno;
111 close(fd);
112 return (err);
113 }
114 if (err != 0) {
115 close(fd);
116 return (err);
117 }
118
119 /* This handle controls per-process resources. */
120 (void) fcntl(fd, F_SETFD, FD_CLOEXEC);
121
122 *fdp = fd;
123 return (0);
124 }
125
126 /*
127 * Request the creation of our per-user smbiod
128 * via door call to the "main" IOD service.
129 */
130 static int
start_iod(void)131 start_iod(void)
132 {
133 const char *svc_door = SMBIOD_SVC_DOOR;
134 door_arg_t da;
135 int32_t cmd, err;
136 int fd, rc;
137
138 fd = open(svc_door, O_RDONLY, 0);
139 if (fd < 0) {
140 err = errno;
141 DPRINT("%s: open failed, err %d", svc_door, err);
142 return (err);
143 }
144 cmd = SMBIOD_START;
145 memset(&da, 0, sizeof (da));
146 da.data_ptr = (void *) &cmd;
147 da.data_size = sizeof (cmd);
148 da.rbuf = (void *) &err;
149 da.rsize = sizeof (err);
150 rc = door_call(fd, &da);
151 close(fd);
152 if (rc < 0) {
153 err = errno;
154 DPRINT("door_call, err %d", err);
155 return (err);
156 }
157
158 return (err);
159 }
160
161 /*
162 * Get a door handle to the IOD, starting it if necessary.
163 * On success, sets ctx->ct_door_fd
164 */
165 int
smb_iod_start(smb_ctx_t * ctx)166 smb_iod_start(smb_ctx_t *ctx)
167 {
168 int err, tmo;
169 int fd = -1;
170
171 tmo = iod_start_timeout;
172 while ((err = smb_iod_open_door(&fd)) != 0) {
173 if (--tmo <= 0)
174 goto errout;
175
176 /*
177 * We have no per-user IOD yet. Request one.
178 * Do this request every time through the loop
179 * because the master IOD will only start our
180 * per-user IOD if we don't have one, and our
181 * first requst could have happened while we
182 * had an IOD that was doing shutdown.
183 * (Prevents a shutdown/startup race).
184 */
185 err = start_iod();
186 if (err != 0)
187 goto errout;
188 /*
189 * Wait for it to get ready.
190 */
191 (void) sleep(1);
192 }
193
194 /* Save the door fd. */
195 if (ctx->ct_door_fd != -1)
196 close(ctx->ct_door_fd);
197 ctx->ct_door_fd = fd;
198
199 return (0);
200
201 errout:
202 smb_error(dgettext(TEXT_DOMAIN,
203 "Could not contact service: %s"),
204 0, "svc:/network/smb/client");
205 return (ENOTACTIVE);
206 }
207
208 /*
209 * Ask the IOD to connect using the info in ctx.
210 * Called by newvc.
211 */
212 int
smb_iod_cl_newvc(smb_ctx_t * ctx)213 smb_iod_cl_newvc(smb_ctx_t *ctx)
214 {
215 door_arg_t da;
216 int err = 0;
217
218 /* Should already have the IOD door. */
219 if (ctx->ct_door_fd < 0)
220 return (EINVAL);
221
222 da.data_ptr = (void *) &ctx->ct_iod_ssn;
223 da.data_size = sizeof (ctx->ct_iod_ssn);
224 da.desc_ptr = NULL;
225 da.desc_num = 0;
226 da.rbuf = (void *) &err;
227 da.rsize = sizeof (err);
228 if (door_call(ctx->ct_door_fd, &da) < 0) {
229 err = errno;
230 DPRINT("door_call, err=%d", err);
231 }
232
233 return (err);
234 }
235