// SPDX-License-Identifier: GPL-2.0
/*
* 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];
int size;
struct udev_device *sif;
size = snprintf(busid, sizeof(busid), "%s:%d.%d",
udev->busid, udev->bConfigurationValue, i);
if (size < 0 || (unsigned int)size >= sizeof(busid)) {
err("busid length %i >= %lu or < 0", size,
(long unsigned)sizeof(busid));
return -1;
}
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);
}
