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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright (C) 2011 matt mooney <mfm@muteddisk.com>
4 * 2005-2007 Takahiro Hirofuchi
5 * Copyright (C) 2015-2016 Samsung Electronics
6 * Igor Kotrasinski <i.kotrasinsk@samsung.com>
7 * Krzysztof Opasiak <k.opasiak@samsung.com>
8 */
9
10#include <sys/types.h>
11#include <libudev.h>
12
13#include <errno.h>
14#include <stdbool.h>
15#include <stdint.h>
16#include <stdio.h>
17#include <stdlib.h>
18#include <string.h>
19
20#include <getopt.h>
21#include <netdb.h>
22#include <unistd.h>
23
24#include <dirent.h>
25
26#include <linux/usb/ch9.h>
27
28#include "usbip_common.h"
29#include "usbip_network.h"
30#include "usbip.h"
31
32static const char usbip_list_usage_string[] =
33 "usbip list [-p|--parsable] <args>\n"
34 " -p, --parsable Parsable list format\n"
35 " -r, --remote=<host> List the exportable USB devices on <host>\n"
36 " -l, --local List the local USB devices\n";
37
38void usbip_list_usage(void)
39{
40 printf("usage: %s", usbip_list_usage_string);
41}
42
43static int get_exported_devices(char *host, int sockfd)
44{
45 char product_name[100];
46 char class_name[100];
47 struct op_devlist_reply reply;
48 uint16_t code = OP_REP_DEVLIST;
49 struct usbip_usb_device udev;
50 struct usbip_usb_interface uintf;
51 unsigned int i;
52 int rc, j;
53 int status;
54
55 rc = usbip_net_send_op_common(sockfd, OP_REQ_DEVLIST, 0);
56 if (rc < 0) {
57 dbg("usbip_net_send_op_common failed");
58 return -1;
59 }
60
61 rc = usbip_net_recv_op_common(sockfd, &code, &status);
62 if (rc < 0) {
63 err("Exported Device List Request failed - %s\n",
64 usbip_op_common_status_string(status));
65 return -1;
66 }
67
68 memset(&reply, 0, sizeof(reply));
69 rc = usbip_net_recv(sockfd, &reply, sizeof(reply));
70 if (rc < 0) {
71 dbg("usbip_net_recv_op_devlist failed");
72 return -1;
73 }
74 PACK_OP_DEVLIST_REPLY(0, &reply);
75 dbg("exportable devices: %d\n", reply.ndev);
76
77 if (reply.ndev == 0) {
78 info("no exportable devices found on %s", host);
79 return 0;
80 }
81
82 printf("Exportable USB devices\n");
83 printf("======================\n");
84 printf(" - %s\n", host);
85
86 for (i = 0; i < reply.ndev; i++) {
87 memset(&udev, 0, sizeof(udev));
88 rc = usbip_net_recv(sockfd, &udev, sizeof(udev));
89 if (rc < 0) {
90 dbg("usbip_net_recv failed: usbip_usb_device[%d]", i);
91 return -1;
92 }
93 usbip_net_pack_usb_device(0, &udev);
94
95 usbip_names_get_product(product_name, sizeof(product_name),
96 udev.idVendor, udev.idProduct);
97 usbip_names_get_class(class_name, sizeof(class_name),
98 udev.bDeviceClass, udev.bDeviceSubClass,
99 udev.bDeviceProtocol);
100 printf("%11s: %s\n", udev.busid, product_name);
101 printf("%11s: %s\n", "", udev.path);
102 printf("%11s: %s\n", "", class_name);
103
104 for (j = 0; j < udev.bNumInterfaces; j++) {
105 rc = usbip_net_recv(sockfd, &uintf, sizeof(uintf));
106 if (rc < 0) {
107 err("usbip_net_recv failed: usbip_usb_intf[%d]",
108 j);
109
110 return -1;
111 }
112 usbip_net_pack_usb_interface(0, &uintf);
113
114 usbip_names_get_class(class_name, sizeof(class_name),
115 uintf.bInterfaceClass,
116 uintf.bInterfaceSubClass,
117 uintf.bInterfaceProtocol);
118 printf("%11s: %2d - %s\n", "", j, class_name);
119 }
120
121 printf("\n");
122 }
123
124 return 0;
125}
126
127static int list_exported_devices(char *host)
128{
129 int rc;
130 int sockfd;
131
132 sockfd = usbip_net_tcp_connect(host, usbip_port_string);
133 if (sockfd < 0) {
134 err("could not connect to %s:%s: %s", host,
135 usbip_port_string, gai_strerror(sockfd));
136 return -1;
137 }
138 dbg("connected to %s:%s", host, usbip_port_string);
139
140 rc = get_exported_devices(host, sockfd);
141 if (rc < 0) {
142 err("failed to get device list from %s", host);
143 return -1;
144 }
145
146 close(sockfd);
147
148 return 0;
149}
150
151static void print_device(const char *busid, const char *vendor,
152 const char *product, bool parsable)
153{
154 if (parsable)
155 printf("busid=%s#usbid=%.4s:%.4s#", busid, vendor, product);
156 else
157 printf(" - busid %s (%.4s:%.4s)\n", busid, vendor, product);
158}
159
160static void print_product_name(char *product_name, bool parsable)
161{
162 if (!parsable)
163 printf(" %s\n", product_name);
164}
165
166static int list_devices(bool parsable)
167{
168 struct udev *udev;
169 struct udev_enumerate *enumerate;
170 struct udev_list_entry *devices, *dev_list_entry;
171 struct udev_device *dev;
172 const char *path;
173 const char *idVendor;
174 const char *idProduct;
175 const char *bConfValue;
176 const char *bNumIntfs;
177 const char *busid;
178 char product_name[128];
179 int ret = -1;
180 const char *devpath;
181
182 /* Create libudev context. */
183 udev = udev_new();
184
185 /* Create libudev device enumeration. */
186 enumerate = udev_enumerate_new(udev);
187
188 /* Take only USB devices that are not hubs and do not have
189 * the bInterfaceNumber attribute, i.e. are not interfaces.
190 */
191 udev_enumerate_add_match_subsystem(enumerate, "usb");
192 udev_enumerate_add_nomatch_sysattr(enumerate, "bDeviceClass", "09");
193 udev_enumerate_add_nomatch_sysattr(enumerate, "bInterfaceNumber", NULL);
194 udev_enumerate_scan_devices(enumerate);
195
196 devices = udev_enumerate_get_list_entry(enumerate);
197
198 /* Show information about each device. */
199 udev_list_entry_foreach(dev_list_entry, devices) {
200 path = udev_list_entry_get_name(dev_list_entry);
201 dev = udev_device_new_from_syspath(udev, path);
202
203 /* Ignore devices attached to vhci_hcd */
204 devpath = udev_device_get_devpath(dev);
205 if (strstr(devpath, USBIP_VHCI_DRV_NAME)) {
206 dbg("Skip the device %s already attached to %s\n",
207 devpath, USBIP_VHCI_DRV_NAME);
208 continue;
209 }
210
211 /* Get device information. */
212 idVendor = udev_device_get_sysattr_value(dev, "idVendor");
213 idProduct = udev_device_get_sysattr_value(dev, "idProduct");
214 bConfValue = udev_device_get_sysattr_value(dev,
215 "bConfigurationValue");
216 bNumIntfs = udev_device_get_sysattr_value(dev,
217 "bNumInterfaces");
218 busid = udev_device_get_sysname(dev);
219 if (!idVendor || !idProduct || !bConfValue || !bNumIntfs) {
220 err("problem getting device attributes: %s",
221 strerror(errno));
222 goto err_out;
223 }
224
225 /* Get product name. */
226 usbip_names_get_product(product_name, sizeof(product_name),
227 strtol(idVendor, NULL, 16),
228 strtol(idProduct, NULL, 16));
229
230 /* Print information. */
231 print_device(busid, idVendor, idProduct, parsable);
232 print_product_name(product_name, parsable);
233
234 printf("\n");
235
236 udev_device_unref(dev);
237 }
238
239 ret = 0;
240
241err_out:
242 udev_enumerate_unref(enumerate);
243 udev_unref(udev);
244
245 return ret;
246}
247
248static int list_gadget_devices(bool parsable)
249{
250 int ret = -1;
251 struct udev *udev;
252 struct udev_enumerate *enumerate;
253 struct udev_list_entry *devices, *dev_list_entry;
254 struct udev_device *dev;
255 const char *path;
256 const char *driver;
257
258 const struct usb_device_descriptor *d_desc;
259 const char *descriptors;
260 char product_name[128];
261
262 uint16_t idVendor;
263 char idVendor_buf[8];
264 uint16_t idProduct;
265 char idProduct_buf[8];
266 const char *busid;
267
268 udev = udev_new();
269 enumerate = udev_enumerate_new(udev);
270
271 udev_enumerate_add_match_subsystem(enumerate, "platform");
272
273 udev_enumerate_scan_devices(enumerate);
274 devices = udev_enumerate_get_list_entry(enumerate);
275
276 udev_list_entry_foreach(dev_list_entry, devices) {
277 path = udev_list_entry_get_name(dev_list_entry);
278 dev = udev_device_new_from_syspath(udev, path);
279
280 driver = udev_device_get_driver(dev);
281 /* We only have mechanism to enumerate gadgets bound to vudc */
282 if (driver == NULL || strcmp(driver, USBIP_DEVICE_DRV_NAME))
283 continue;
284
285 /* Get device information. */
286 descriptors = udev_device_get_sysattr_value(dev,
287 VUDC_DEVICE_DESCR_FILE);
288
289 if (!descriptors) {
290 err("problem getting device attributes: %s",
291 strerror(errno));
292 goto err_out;
293 }
294
295 d_desc = (const struct usb_device_descriptor *) descriptors;
296
297 idVendor = le16toh(d_desc->idVendor);
298 sprintf(idVendor_buf, "0x%4x", idVendor);
299 idProduct = le16toh(d_desc->idProduct);
300 sprintf(idProduct_buf, "0x%4x", idVendor);
301 busid = udev_device_get_sysname(dev);
302
303 /* Get product name. */
304 usbip_names_get_product(product_name, sizeof(product_name),
305 le16toh(idVendor),
306 le16toh(idProduct));
307
308 /* Print information. */
309 print_device(busid, idVendor_buf, idProduct_buf, parsable);
310 print_product_name(product_name, parsable);
311
312 printf("\n");
313
314 udev_device_unref(dev);
315 }
316 ret = 0;
317
318err_out:
319 udev_enumerate_unref(enumerate);
320 udev_unref(udev);
321
322 return ret;
323}
324
325int usbip_list(int argc, char *argv[])
326{
327 static const struct option opts[] = {
328 { "parsable", no_argument, NULL, 'p' },
329 { "remote", required_argument, NULL, 'r' },
330 { "local", no_argument, NULL, 'l' },
331 { "device", no_argument, NULL, 'd' },
332 { NULL, 0, NULL, 0 }
333 };
334
335 bool parsable = false;
336 int opt;
337 int ret = -1;
338
339 if (usbip_names_init(USBIDS_FILE))
340 err("failed to open %s", USBIDS_FILE);
341
342 for (;;) {
343 opt = getopt_long(argc, argv, "pr:ld", opts, NULL);
344
345 if (opt == -1)
346 break;
347
348 switch (opt) {
349 case 'p':
350 parsable = true;
351 break;
352 case 'r':
353 ret = list_exported_devices(optarg);
354 goto out;
355 case 'l':
356 ret = list_devices(parsable);
357 goto out;
358 case 'd':
359 ret = list_gadget_devices(parsable);
360 goto out;
361 default:
362 goto err_out;
363 }
364 }
365
366err_out:
367 usbip_list_usage();
368out:
369 usbip_names_free();
370
371 return ret;
372}