summaryrefslogtreecommitdiff
path: root/tools/usb/usbip/libsrc/usbip_common.c
blob: ac73710473deaecd079d9846f3a9f5239b8055df (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
/*
 * Copyright (C) 2005-2007 Takahiro Hirofuchi
 */

#include <libudev.h>
#include "usbip_common.h"
#include "names.h"

#undef  PROGNAME
#define PROGNAME "libusbip"

int usbip_use_syslog;
int usbip_use_stderr;
int usbip_use_debug;

extern struct udev *udev_context;

struct speed_string {
	int num;
	char *speed;
	char *desc;
};

static const struct speed_string speed_strings[] = {
	{ USB_SPEED_UNKNOWN, "unknown", "Unknown Speed"},
	{ USB_SPEED_LOW,  "1.5", "Low Speed(1.5Mbps)"  },
	{ USB_SPEED_FULL, "12",  "Full Speed(12Mbps)" },
	{ USB_SPEED_HIGH, "480", "High Speed(480Mbps)" },
	{ USB_SPEED_WIRELESS, "53.3-480", "Wireless"},
	{ USB_SPEED_SUPER, "5000", "Super Speed(5000Mbps)" },
	{ 0, NULL, NULL }
};

struct portst_string {
	int num;
	char *desc;
};

static struct portst_string portst_strings[] = {
	{ SDEV_ST_AVAILABLE,	"Device Available" },
	{ SDEV_ST_USED,		"Device in Use" },
	{ SDEV_ST_ERROR,	"Device Error"},
	{ VDEV_ST_NULL,		"Port Available"},
	{ VDEV_ST_NOTASSIGNED,	"Port Initializing"},
	{ VDEV_ST_USED,		"Port in Use"},
	{ VDEV_ST_ERROR,	"Port Error"},
	{ 0, NULL}
};

const char *usbip_status_string(int32_t status)
{
	for (int i = 0; portst_strings[i].desc != NULL; i++)
		if (portst_strings[i].num == status)
			return portst_strings[i].desc;

	return "Unknown Status";
}

const char *usbip_speed_string(int num)
{
	for (int i = 0; speed_strings[i].speed != NULL; i++)
		if (speed_strings[i].num == num)
			return speed_strings[i].desc;

	return "Unknown Speed";
}


#define DBG_UDEV_INTEGER(name)\
	dbg("%-20s = %x", to_string(name), (int) udev->name)

#define DBG_UINF_INTEGER(name)\
	dbg("%-20s = %x", to_string(name), (int) uinf->name)

void dump_usb_interface(struct usbip_usb_interface *uinf)
{
	char buff[100];

	usbip_names_get_class(buff, sizeof(buff),
			uinf->bInterfaceClass,
			uinf->bInterfaceSubClass,
			uinf->bInterfaceProtocol);
	dbg("%-20s = %s", "Interface(C/SC/P)", buff);
}

void dump_usb_device(struct usbip_usb_device *udev)
{
	char buff[100];

	dbg("%-20s = %s", "path",  udev->path);
	dbg("%-20s = %s", "busid", udev->busid);

	usbip_names_get_class(buff, sizeof(buff),
			udev->bDeviceClass,
			udev->bDeviceSubClass,
			udev->bDeviceProtocol);
	dbg("%-20s = %s", "Device(C/SC/P)", buff);

	DBG_UDEV_INTEGER(bcdDevice);

	usbip_names_get_product(buff, sizeof(buff),
			udev->idVendor,
			udev->idProduct);
	dbg("%-20s = %s", "Vendor/Product", buff);

	DBG_UDEV_INTEGER(bNumConfigurations);
	DBG_UDEV_INTEGER(bNumInterfaces);

	dbg("%-20s = %s", "speed",
			usbip_speed_string(udev->speed));

	DBG_UDEV_INTEGER(busnum);
	DBG_UDEV_INTEGER(devnum);
}


int read_attr_value(struct udev_device *dev, const char *name,
		    const char *format)
{
	const char *attr;
	int num = 0;
	int ret;

	attr = udev_device_get_sysattr_value(dev, name);
	if (!attr) {
		err("udev_device_get_sysattr_value failed");
		goto err;
	}

	/* The client chooses the device configuration
	 * when attaching it so right after being bound
	 * to usbip-host on the server the device will
	 * have no configuration.
	 * Therefore, attributes such as bConfigurationValue
	 * and bNumInterfaces will not exist and sscanf will
	 * fail. Check for these cases and don't treat them
	 * as errors.
	 */

	ret = sscanf(attr, format, &num);
	if (ret < 1) {
		if (strcmp(name, "bConfigurationValue") &&
				strcmp(name, "bNumInterfaces")) {
			err("sscanf failed for attribute %s", name);
			goto err;
		}
	}

err:

	return num;
}


int read_attr_speed(struct udev_device *dev)
{
	const char *speed;

	speed = udev_device_get_sysattr_value(dev, "speed");
	if (!speed) {
		err("udev_device_get_sysattr_value failed");
		goto err;
	}

	for (int i = 0; speed_strings[i].speed != NULL; i++) {
		if (!strcmp(speed, speed_strings[i].speed))
			return speed_strings[i].num;
	}

err:

	return USB_SPEED_UNKNOWN;
}

#define READ_ATTR(object, type, dev, name, format)			      \
	do {								      \
		(object)->name = (type) read_attr_value(dev, to_string(name), \
							format);	      \
	} while (0)


int read_usb_device(struct udev_device *sdev, struct usbip_usb_device *udev)
{
	uint32_t busnum, devnum;
	const char *path, *name;

	READ_ATTR(udev, uint8_t,  sdev, bDeviceClass,		"%02x\n");
	READ_ATTR(udev, uint8_t,  sdev, bDeviceSubClass,	"%02x\n");
	READ_ATTR(udev, uint8_t,  sdev, bDeviceProtocol,	"%02x\n");

	READ_ATTR(udev, uint16_t, sdev, idVendor,		"%04x\n");
	READ_ATTR(udev, uint16_t, sdev, idProduct,		"%04x\n");
	READ_ATTR(udev, uint16_t, sdev, bcdDevice,		"%04x\n");

	READ_ATTR(udev, uint8_t,  sdev, bConfigurationValue,	"%02x\n");
	READ_ATTR(udev, uint8_t,  sdev, bNumConfigurations,	"%02x\n");
	READ_ATTR(udev, uint8_t,  sdev, bNumInterfaces,		"%02x\n");

	READ_ATTR(udev, uint8_t,  sdev, devnum,			"%d\n");
	udev->speed = read_attr_speed(sdev);

	path = udev_device_get_syspath(sdev);
	name = udev_device_get_sysname(sdev);

	strncpy(udev->path,  path,  SYSFS_PATH_MAX);
	strncpy(udev->busid, name, SYSFS_BUS_ID_SIZE);

	sscanf(name, "%u-%u", &busnum, &devnum);
	udev->busnum = busnum;

	return 0;
}

int read_usb_interface(struct usbip_usb_device *udev, int i,
		       struct usbip_usb_interface *uinf)
{
	char busid[SYSFS_BUS_ID_SIZE];
	struct udev_device *sif;

	sprintf(busid, "%s:%d.%d", udev->busid, udev->bConfigurationValue, i);

	sif = udev_device_new_from_subsystem_sysname(udev_context, "usb", busid);
	if (!sif) {
		err("udev_device_new_from_subsystem_sysname %s failed", busid);
		return -1;
	}

	READ_ATTR(uinf, uint8_t,  sif, bInterfaceClass,		"%02x\n");
	READ_ATTR(uinf, uint8_t,  sif, bInterfaceSubClass,	"%02x\n");
	READ_ATTR(uinf, uint8_t,  sif, bInterfaceProtocol,	"%02x\n");

	return 0;
}

int usbip_names_init(char *f)
{
	return names_init(f);
}

void usbip_names_free(void)
{
	names_free();
}

void usbip_names_get_product(char *buff, size_t size, uint16_t vendor,
			     uint16_t product)
{
	const char *prod, *vend;

	prod = names_product(vendor, product);
	if (!prod)
		prod = "unknown product";


	vend = names_vendor(vendor);
	if (!vend)
		vend = "unknown vendor";

	snprintf(buff, size, "%s : %s (%04x:%04x)", vend, prod, vendor, product);
}

void usbip_names_get_class(char *buff, size_t size, uint8_t class,
			   uint8_t subclass, uint8_t protocol)
{
	const char *c, *s, *p;

	if (class == 0 && subclass == 0 && protocol == 0) {
		snprintf(buff, size, "(Defined at Interface level) (%02x/%02x/%02x)", class, subclass, protocol);
		return;
	}

	p = names_protocol(class, subclass, protocol);
	if (!p)
		p = "unknown protocol";

	s = names_subclass(class, subclass);
	if (!s)
		s = "unknown subclass";

	c = names_class(class);
	if (!c)
		c = "unknown class";

	snprintf(buff, size, "%s / %s / %s (%02x/%02x/%02x)", c, s, p, class, subclass, protocol);
}