1 /*
2 * Copyright (C) 2011 matt mooney <mfm@muteddisk.com>
3 * 2005-2007 Takahiro Hirofuchi
4 *
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
17 */
18
19 #ifdef HAVE_CONFIG_H
20 #include "../config.h"
21 #endif
22
23 #include <errno.h>
24 #include <unistd.h>
25 #include <netdb.h>
26 #include <string.h>
27 #include <stdlib.h>
28 #include <sys/types.h>
29 #include <sys/stat.h>
30 #include <arpa/inet.h>
31 #include <sys/socket.h>
32 #include <netinet/in.h>
33
34 #ifdef HAVE_LIBWRAP
35 #include <tcpd.h>
36 #endif
37
38 #define _GNU_SOURCE
39 #include <getopt.h>
40 #include <glib.h>
41 #include <signal.h>
42
43 #include "usbip_host_driver.h"
44 #include "usbip_common.h"
45 #include "usbip_network.h"
46
47 #undef PROGNAME
48 #define PROGNAME "usbipd"
49 #define MAXSOCKFD 20
50
51 GMainLoop *main_loop;
52
53 static const char usbip_version_string[] = PACKAGE_STRING;
54
55 static const char usbipd_help_string[] =
56 "usage: usbipd [options] \n"
57 " -D, --daemon \n"
58 " Run as a daemon process. \n"
59 " \n"
60 " -d, --debug \n"
61 " Print debugging information. \n"
62 " \n"
63 " -h, --help \n"
64 " Print this help. \n"
65 " \n"
66 " -v, --version \n"
67 " Show version. \n";
68
usbipd_help(void)69 static void usbipd_help(void)
70 {
71 printf("%s\n", usbipd_help_string);
72 }
73
recv_request_import(int sockfd)74 static int recv_request_import(int sockfd)
75 {
76 struct op_import_request req;
77 struct op_common reply;
78 struct usbip_exported_device *edev;
79 struct usbip_usb_device pdu_udev;
80 int found = 0;
81 int error = 0;
82 int rc;
83
84 memset(&req, 0, sizeof(req));
85 memset(&reply, 0, sizeof(reply));
86
87 rc = usbip_net_recv(sockfd, &req, sizeof(req));
88 if (rc < 0) {
89 dbg("usbip_net_recv failed: import request");
90 return -1;
91 }
92 PACK_OP_IMPORT_REQUEST(0, &req);
93
94 dlist_for_each_data(host_driver->edev_list, edev,
95 struct usbip_exported_device) {
96 if (!strncmp(req.busid, edev->udev.busid, SYSFS_BUS_ID_SIZE)) {
97 info("found requested device: %s", req.busid);
98 found = 1;
99 break;
100 }
101 }
102
103 if (found) {
104 /* should set TCP_NODELAY for usbip */
105 usbip_net_set_nodelay(sockfd);
106
107 /* export device needs a TCP/IP socket descriptor */
108 rc = usbip_host_export_device(edev, sockfd);
109 if (rc < 0)
110 error = 1;
111 } else {
112 info("requested device not found: %s", req.busid);
113 error = 1;
114 }
115
116 rc = usbip_net_send_op_common(sockfd, OP_REP_IMPORT,
117 (!error ? ST_OK : ST_NA));
118 if (rc < 0) {
119 dbg("usbip_net_send_op_common failed: %#0x", OP_REP_IMPORT);
120 return -1;
121 }
122
123 if (error) {
124 dbg("import request busid %s: failed", req.busid);
125 return -1;
126 }
127
128 memcpy(&pdu_udev, &edev->udev, sizeof(pdu_udev));
129 usbip_net_pack_usb_device(1, &pdu_udev);
130
131 rc = usbip_net_send(sockfd, &pdu_udev, sizeof(pdu_udev));
132 if (rc < 0) {
133 dbg("usbip_net_send failed: devinfo");
134 return -1;
135 }
136
137 dbg("import request busid %s: complete", req.busid);
138
139 return 0;
140 }
141
send_reply_devlist(int connfd)142 static int send_reply_devlist(int connfd)
143 {
144 struct usbip_exported_device *edev;
145 struct usbip_usb_device pdu_udev;
146 struct usbip_usb_interface pdu_uinf;
147 struct op_devlist_reply reply;
148 int i;
149 int rc;
150
151 reply.ndev = 0;
152 /* number of exported devices */
153 dlist_for_each_data(host_driver->edev_list, edev,
154 struct usbip_exported_device) {
155 reply.ndev += 1;
156 }
157 info("exportable devices: %d", reply.ndev);
158
159 rc = usbip_net_send_op_common(connfd, OP_REP_DEVLIST, ST_OK);
160 if (rc < 0) {
161 dbg("usbip_net_send_op_common failed: %#0x", OP_REP_DEVLIST);
162 return -1;
163 }
164 PACK_OP_DEVLIST_REPLY(1, &reply);
165
166 rc = usbip_net_send(connfd, &reply, sizeof(reply));
167 if (rc < 0) {
168 dbg("usbip_net_send failed: %#0x", OP_REP_DEVLIST);
169 return -1;
170 }
171
172 dlist_for_each_data(host_driver->edev_list, edev,
173 struct usbip_exported_device) {
174 dump_usb_device(&edev->udev);
175 memcpy(&pdu_udev, &edev->udev, sizeof(pdu_udev));
176 usbip_net_pack_usb_device(1, &pdu_udev);
177
178 rc = usbip_net_send(connfd, &pdu_udev, sizeof(pdu_udev));
179 if (rc < 0) {
180 dbg("usbip_net_send failed: pdu_udev");
181 return -1;
182 }
183
184 for (i = 0; i < edev->udev.bNumInterfaces; i++) {
185 dump_usb_interface(&edev->uinf[i]);
186 memcpy(&pdu_uinf, &edev->uinf[i], sizeof(pdu_uinf));
187 usbip_net_pack_usb_interface(1, &pdu_uinf);
188
189 rc = usbip_net_send(connfd, &pdu_uinf,
190 sizeof(pdu_uinf));
191 if (rc < 0) {
192 dbg("usbip_net_send failed: pdu_uinf");
193 return -1;
194 }
195 }
196 }
197
198 return 0;
199 }
200
recv_request_devlist(int connfd)201 static int recv_request_devlist(int connfd)
202 {
203 struct op_devlist_request req;
204 int rc;
205
206 memset(&req, 0, sizeof(req));
207
208 rc = usbip_net_recv(connfd, &req, sizeof(req));
209 if (rc < 0) {
210 dbg("usbip_net_recv failed: devlist request");
211 return -1;
212 }
213
214 rc = send_reply_devlist(connfd);
215 if (rc < 0) {
216 dbg("send_reply_devlist failed");
217 return -1;
218 }
219
220 return 0;
221 }
222
recv_pdu(int connfd)223 static int recv_pdu(int connfd)
224 {
225 uint16_t code = OP_UNSPEC;
226 int ret;
227
228 ret = usbip_net_recv_op_common(connfd, &code);
229 if (ret < 0) {
230 dbg("could not receive opcode: %#0x", code);
231 return -1;
232 }
233
234 ret = usbip_host_refresh_device_list();
235 if (ret < 0) {
236 dbg("could not refresh device list: %d", ret);
237 return -1;
238 }
239
240 info("received request: %#0x(%d)", code, connfd);
241 switch (code) {
242 case OP_REQ_DEVLIST:
243 ret = recv_request_devlist(connfd);
244 break;
245 case OP_REQ_IMPORT:
246 ret = recv_request_import(connfd);
247 break;
248 case OP_REQ_DEVINFO:
249 case OP_REQ_CRYPKEY:
250 default:
251 err("received an unknown opcode: %#0x", code);
252 ret = -1;
253 }
254
255 if (ret == 0)
256 info("request %#0x(%d): complete", code, connfd);
257 else
258 info("request %#0x(%d): failed", code, connfd);
259
260 return ret;
261 }
262
263 #ifdef HAVE_LIBWRAP
tcpd_auth(int connfd)264 static int tcpd_auth(int connfd)
265 {
266 struct request_info request;
267 int rc;
268
269 request_init(&request, RQ_DAEMON, PROGNAME, RQ_FILE, connfd, 0);
270 fromhost(&request);
271 rc = hosts_access(&request);
272 if (rc == 0)
273 return -1;
274
275 return 0;
276 }
277 #endif
278
do_accept(int listenfd)279 static int do_accept(int listenfd)
280 {
281 int connfd;
282 struct sockaddr_storage ss;
283 socklen_t len = sizeof(ss);
284 char host[NI_MAXHOST], port[NI_MAXSERV];
285 int rc;
286
287 memset(&ss, 0, sizeof(ss));
288
289 connfd = accept(listenfd, (struct sockaddr *) &ss, &len);
290 if (connfd < 0) {
291 err("failed to accept connection");
292 return -1;
293 }
294
295 rc = getnameinfo((struct sockaddr *) &ss, len, host, sizeof(host),
296 port, sizeof(port), NI_NUMERICHOST | NI_NUMERICSERV);
297 if (rc)
298 err("getnameinfo: %s", gai_strerror(rc));
299
300 #ifdef HAVE_LIBWRAP
301 rc = tcpd_auth(connfd);
302 if (rc < 0) {
303 info("denied access from %s", host);
304 close(connfd);
305 return -1;
306 }
307 #endif
308 info("connection from %s:%s", host, port);
309
310 return connfd;
311 }
312
process_request(GIOChannel * gio,GIOCondition condition,gpointer unused_data)313 gboolean process_request(GIOChannel *gio, GIOCondition condition,
314 gpointer unused_data)
315 {
316 int listenfd;
317 int connfd;
318
319 (void) unused_data;
320
321 if (condition & (G_IO_ERR | G_IO_HUP | G_IO_NVAL)) {
322 err("unknown condition");
323 BUG();
324 }
325
326 if (condition & G_IO_IN) {
327 listenfd = g_io_channel_unix_get_fd(gio);
328 connfd = do_accept(listenfd);
329 if (connfd < 0)
330 return TRUE;
331
332 recv_pdu(connfd);
333 close(connfd);
334 }
335
336 return TRUE;
337 }
338
log_addrinfo(struct addrinfo * ai)339 static void log_addrinfo(struct addrinfo *ai)
340 {
341 char hbuf[NI_MAXHOST];
342 char sbuf[NI_MAXSERV];
343 int rc;
344
345 rc = getnameinfo(ai->ai_addr, ai->ai_addrlen, hbuf, sizeof(hbuf),
346 sbuf, sizeof(sbuf), NI_NUMERICHOST | NI_NUMERICSERV);
347 if (rc)
348 err("getnameinfo: %s", gai_strerror(rc));
349
350 info("listening on %s:%s", hbuf, sbuf);
351 }
352
listen_all_addrinfo(struct addrinfo * ai_head,int sockfdlist[])353 static int listen_all_addrinfo(struct addrinfo *ai_head, int sockfdlist[])
354 {
355 struct addrinfo *ai;
356 int ret, nsockfd = 0;
357
358 for (ai = ai_head; ai && nsockfd < MAXSOCKFD; ai = ai->ai_next) {
359 sockfdlist[nsockfd] = socket(ai->ai_family, ai->ai_socktype,
360 ai->ai_protocol);
361 if (sockfdlist[nsockfd] < 0)
362 continue;
363
364 usbip_net_set_reuseaddr(sockfdlist[nsockfd]);
365 usbip_net_set_nodelay(sockfdlist[nsockfd]);
366
367 if (sockfdlist[nsockfd] >= FD_SETSIZE) {
368 close(sockfdlist[nsockfd]);
369 sockfdlist[nsockfd] = -1;
370 continue;
371 }
372
373 ret = bind(sockfdlist[nsockfd], ai->ai_addr, ai->ai_addrlen);
374 if (ret < 0) {
375 close(sockfdlist[nsockfd]);
376 sockfdlist[nsockfd] = -1;
377 continue;
378 }
379
380 ret = listen(sockfdlist[nsockfd], SOMAXCONN);
381 if (ret < 0) {
382 close(sockfdlist[nsockfd]);
383 sockfdlist[nsockfd] = -1;
384 continue;
385 }
386
387 log_addrinfo(ai);
388 nsockfd++;
389 }
390
391 if (nsockfd == 0)
392 return -1;
393
394 dbg("listening on %d address%s", nsockfd, (nsockfd == 1) ? "" : "es");
395
396 return nsockfd;
397 }
398
do_getaddrinfo(char * host,int ai_family)399 static struct addrinfo *do_getaddrinfo(char *host, int ai_family)
400 {
401 struct addrinfo hints, *ai_head;
402 int rc;
403
404 memset(&hints, 0, sizeof(hints));
405 hints.ai_family = ai_family;
406 hints.ai_socktype = SOCK_STREAM;
407 hints.ai_flags = AI_PASSIVE;
408
409 rc = getaddrinfo(host, USBIP_PORT_STRING, &hints, &ai_head);
410 if (rc) {
411 err("failed to get a network address %s: %s", USBIP_PORT_STRING,
412 gai_strerror(rc));
413 return NULL;
414 }
415
416 return ai_head;
417 }
418
signal_handler(int i)419 static void signal_handler(int i)
420 {
421 dbg("received signal: code %d", i);
422
423 if (main_loop)
424 g_main_loop_quit(main_loop);
425 }
426
set_signal(void)427 static void set_signal(void)
428 {
429 struct sigaction act;
430
431 memset(&act, 0, sizeof(act));
432 act.sa_handler = signal_handler;
433 sigemptyset(&act.sa_mask);
434 sigaction(SIGTERM, &act, NULL);
435 sigaction(SIGINT, &act, NULL);
436 }
437
do_standalone_mode(gboolean daemonize)438 static int do_standalone_mode(gboolean daemonize)
439 {
440 struct addrinfo *ai_head;
441 int sockfdlist[MAXSOCKFD];
442 int nsockfd;
443 int i;
444
445 if (usbip_names_init(USBIDS_FILE))
446 err("failed to open %s", USBIDS_FILE);
447
448 if (usbip_host_driver_open()) {
449 err("please load " USBIP_CORE_MOD_NAME ".ko and "
450 USBIP_HOST_DRV_NAME ".ko!");
451 return -1;
452 }
453
454 if (daemonize) {
455 if (daemon(0,0) < 0) {
456 err("daemonizing failed: %s", strerror(errno));
457 return -1;
458 }
459
460 usbip_use_syslog = 1;
461 }
462 set_signal();
463
464 ai_head = do_getaddrinfo(NULL, PF_UNSPEC);
465 if (!ai_head)
466 return -1;
467
468 info("starting " PROGNAME " (%s)", usbip_version_string);
469
470 nsockfd = listen_all_addrinfo(ai_head, sockfdlist);
471 if (nsockfd <= 0) {
472 err("failed to open a listening socket");
473 return -1;
474 }
475
476 for (i = 0; i < nsockfd; i++) {
477 GIOChannel *gio;
478
479 gio = g_io_channel_unix_new(sockfdlist[i]);
480 g_io_add_watch(gio, (G_IO_IN | G_IO_ERR | G_IO_HUP | G_IO_NVAL),
481 process_request, NULL);
482 }
483
484 main_loop = g_main_loop_new(FALSE, FALSE);
485 g_main_loop_run(main_loop);
486
487 info("shutting down " PROGNAME);
488
489 freeaddrinfo(ai_head);
490 usbip_host_driver_close();
491 usbip_names_free();
492
493 return 0;
494 }
495
main(int argc,char * argv[])496 int main(int argc, char *argv[])
497 {
498 static const struct option longopts[] = {
499 { "daemon", no_argument, NULL, 'D' },
500 { "debug", no_argument, NULL, 'd' },
501 { "help", no_argument, NULL, 'h' },
502 { "version", no_argument, NULL, 'v' },
503 { NULL, 0, NULL, 0 }
504 };
505
506 enum {
507 cmd_standalone_mode = 1,
508 cmd_help,
509 cmd_version
510 } cmd;
511
512 gboolean daemonize = FALSE;
513 int opt, rc = -1;
514
515 usbip_use_stderr = 1;
516 usbip_use_syslog = 0;
517
518 if (geteuid() != 0)
519 err("not running as root?");
520
521 cmd = cmd_standalone_mode;
522 for (;;) {
523 opt = getopt_long(argc, argv, "Ddhv", longopts, NULL);
524
525 if (opt == -1)
526 break;
527
528 switch (opt) {
529 case 'D':
530 daemonize = TRUE;
531 break;
532 case 'd':
533 usbip_use_debug = 1;
534 break;
535 case 'h':
536 cmd = cmd_help;
537 break;
538 case 'v':
539 cmd = cmd_version;
540 break;
541 case '?':
542 usbipd_help();
543 default:
544 goto err_out;
545 }
546 }
547
548 switch (cmd) {
549 case cmd_standalone_mode:
550 rc = do_standalone_mode(daemonize);
551 break;
552 case cmd_version:
553 printf(PROGNAME " (%s)\n", usbip_version_string);
554 rc = 0;
555 break;
556 case cmd_help:
557 usbipd_help();
558 rc = 0;
559 break;
560 default:
561 usbipd_help();
562 goto err_out;
563 }
564
565 err_out:
566 return (rc > -1 ? EXIT_SUCCESS : EXIT_FAILURE);
567 }
568