kernel/tools/usb/usbip/src/usbip_list.c

   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 #include <sys/types.h>
  20 #include <libudev.h>
  21
  22 #include <errno.h>
  23 #include <stdbool.h>
  24 #include <stdint.h>
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27 #include <string.h>
  28
  29 #include <getopt.h>
  30 #include <netdb.h>
  31 #include <unistd.h>
  32
  33 #include "usbip_common.h"
  34 #include "usbip_network.h"
  35 #include "usbip.h"
  36
  37 static const char usbip_list_usage_string[] =
  38         "usbip list [-p|--parsable] <args>\n"
  39         "    -p, --parsable         Parsable list format\n"
  40         "    -r, --remote=<host>    List the exportable USB devices on <host>\n"
  41         "    -l, --local            List the local USB devices\n";
  42
  43 void usbip_list_usage(void)
  44 {
  45         printf("usage: %s", usbip_list_usage_string);
  46 }
  47
  48 static int get_exported_devices(char *host, int sockfd)
  49 {
  50         char product_name[100];
  51         char class_name[100];
  52         struct op_devlist_reply reply;
  53         uint16_t code = OP_REP_DEVLIST;
  54         struct usbip_usb_device udev;
  55         struct usbip_usb_interface uintf;
  56         unsigned int i;
  57         int rc, j;
  58
  59         rc = usbip_net_send_op_common(sockfd, OP_REQ_DEVLIST, 0);
  60         if (rc < 0) {
  61                 dbg("usbip_net_send_op_common failed");
  62                 return -1;
  63         }
  64
  65         rc = usbip_net_recv_op_common(sockfd, &code);
  66         if (rc < 0) {
  67                 dbg("usbip_net_recv_op_common failed");
  68                 return -1;
  69         }
  70
  71         memset(&reply, 0, sizeof(reply));
  72         rc = usbip_net_recv(sockfd, &reply, sizeof(reply));
  73         if (rc < 0) {
  74                 dbg("usbip_net_recv_op_devlist failed");
  75                 return -1;
  76         }
  77         PACK_OP_DEVLIST_REPLY(0, &reply);
  78         dbg("exportable devices: %d\n", reply.ndev);
  79
  80         if (reply.ndev == 0) {
  81                 info("no exportable devices found on %s", host);
  82                 return 0;
  83         }
  84
  85         printf("Exportable USB devices\n");
  86         printf("======================\n");
  87         printf(" - %s\n", host);
  88
  89         for (i = 0; i < reply.ndev; i++) {
  90                 memset(&udev, 0, sizeof(udev));
  91                 rc = usbip_net_recv(sockfd, &udev, sizeof(udev));
  92                 if (rc < 0) {
  93                         dbg("usbip_net_recv failed: usbip_usb_device[%d]", i);
  94                         return -1;
  95                 }
  96                 usbip_net_pack_usb_device(0, &udev);
  97
  98                 usbip_names_get_product(product_name, sizeof(product_name),
  99                                         udev.idVendor, udev.idProduct);
 100                 usbip_names_get_class(class_name, sizeof(class_name),
 101                                       udev.bDeviceClass, udev.bDeviceSubClass,
 102                                       udev.bDeviceProtocol);
 103                 printf("%11s: %s\n", udev.busid, product_name);
 104                 printf("%11s: %s\n", "", udev.path);
 105                 printf("%11s: %s\n", "", class_name);
 106
 107                 for (j = 0; j < udev.bNumInterfaces; j++) {
 108                         rc = usbip_net_recv(sockfd, &uintf, sizeof(uintf));
 109                         if (rc < 0) {
 110                                 err("usbip_net_recv failed: usbip_usb_intf[%d]",
 111                                                 j);
 112
 113                                 return -1;
 114                         }
 115                         usbip_net_pack_usb_interface(0, &uintf);
 116
 117                         usbip_names_get_class(class_name, sizeof(class_name),
 118                                         uintf.bInterfaceClass,
 119                                         uintf.bInterfaceSubClass,
 120                                         uintf.bInterfaceProtocol);
 121                         printf("%11s: %2d - %s\n", "", j, class_name);
 122                 }
 123
 124                 printf("\n");
 125         }
 126
 127         return 0;
 128 }
 129
 130 static int list_exported_devices(char *host)
 131 {
 132         int rc;
 133         int sockfd;
 134
 135         sockfd = usbip_net_tcp_connect(host, usbip_port_string);
 136         if (sockfd < 0) {
 137                 err("could not connect to %s:%s: %s", host,
 138                     usbip_port_string, gai_strerror(sockfd));
 139                 return -1;
 140         }
 141         dbg("connected to %s:%s", host, usbip_port_string);
 142
 143         rc = get_exported_devices(host, sockfd);
 144         if (rc < 0) {
 145                 err("failed to get device list from %s", host);
 146                 return -1;
 147         }
 148
 149         close(sockfd);
 150
 151         return 0;
 152 }
 153
 154 static void print_device(const char *busid, const char *vendor,
 155                          const char *product, bool parsable)
 156 {
 157         if (parsable)
 158                 printf("busid=%s#usbid=%.4s:%.4s#", busid, vendor, product);
 159         else
 160                 printf(" - busid %s (%.4s:%.4s)\n", busid, vendor, product);
 161 }
 162
 163 static void print_product_name(char *product_name, bool parsable)
 164 {
 165         if (!parsable)
 166                 printf("   %s\n", product_name);
 167 }
 168
 169 static int list_devices(bool parsable)
 170 {
 171         struct udev *udev;
 172         struct udev_enumerate *enumerate;
 173         struct udev_list_entry *devices, *dev_list_entry;
 174         struct udev_device *dev;
 175         const char *path;
 176         const char *idVendor;
 177         const char *idProduct;
 178         const char *bConfValue;
 179         const char *bNumIntfs;
 180         const char *busid;
 181         char product_name[128];
 182         int ret = -1;
 183
 184         /* Create libudev context. */
 185         udev = udev_new();
 186
 187         /* Create libudev device enumeration. */
 188         enumerate = udev_enumerate_new(udev);
 189
 190         /* Take only USB devices that are not hubs and do not have
 191          * the bInterfaceNumber attribute, i.e. are not interfaces.
 192          */
 193         udev_enumerate_add_match_subsystem(enumerate, "usb");
 194         udev_enumerate_add_nomatch_sysattr(enumerate, "bDeviceClass", "09");
 195         udev_enumerate_add_nomatch_sysattr(enumerate, "bInterfaceNumber", NULL);
 196         udev_enumerate_scan_devices(enumerate);
 197
 198         devices = udev_enumerate_get_list_entry(enumerate);
 199
 200         /* Show information about each device. */
 201         udev_list_entry_foreach(dev_list_entry, devices) {
 202                 path = udev_list_entry_get_name(dev_list_entry);
 203                 dev = udev_device_new_from_syspath(udev, path);
 204
 205                 /* Get device information. */
 206                 idVendor = udev_device_get_sysattr_value(dev, "idVendor");
 207                 idProduct = udev_device_get_sysattr_value(dev, "idProduct");
 208                 bConfValue = udev_device_get_sysattr_value(dev, "bConfigurationValue");
 209                 bNumIntfs = udev_device_get_sysattr_value(dev, "bNumInterfaces");
 210                 busid = udev_device_get_sysname(dev);
 211                 if (!idVendor || !idProduct || !bConfValue || !bNumIntfs) {
 212                         err("problem getting device attributes: %s",
 213                             strerror(errno));
 214                         goto err_out;
 215                 }
 216
 217                 /* Get product name. */
 218                 usbip_names_get_product(product_name, sizeof(product_name),
 219                                         strtol(idVendor, NULL, 16),
 220                                         strtol(idProduct, NULL, 16));
 221
 222                 /* Print information. */
 223                 print_device(busid, idVendor, idProduct, parsable);
 224                 print_product_name(product_name, parsable);
 225
 226                 printf("\n");
 227
 228                 udev_device_unref(dev);
 229         }
 230
 231         ret = 0;
 232
 233 err_out:
 234         udev_enumerate_unref(enumerate);
 235         udev_unref(udev);
 236
 237         return ret;
 238 }
 239
 240 int usbip_list(int argc, char *argv[])
 241 {
 242         static const struct option opts[] = {
 243                 { "parsable", no_argument,       NULL, 'p' },
 244                 { "remote",   required_argument, NULL, 'r' },
 245                 { "local",    no_argument,       NULL, 'l' },
 246                 { NULL,       0,                 NULL,  0  }
 247         };
 248
 249         bool parsable = false;
 250         int opt;
 251         int ret = -1;
 252
 253         if (usbip_names_init(USBIDS_FILE))
 254                 err("failed to open %s", USBIDS_FILE);
 255
 256         for (;;) {
 257                 opt = getopt_long(argc, argv, "pr:l", opts, NULL);
 258
 259                 if (opt == -1)
 260                         break;
 261
 262                 switch (opt) {
 263                 case 'p':
 264                         parsable = true;
 265                         break;
 266                 case 'r':
 267                         ret = list_exported_devices(optarg);
 268                         goto out;
 269                 case 'l':
 270                         ret = list_devices(parsable);
 271                         goto out;
 272                 default:
 273                         goto err_out;
 274                 }
 275         }
 276
 277 err_out:
 278         usbip_list_usage();
 279 out:
 280         usbip_names_free();
 281
 282         return ret;
 283 }