/*-
* SPDX-License-Identifier: Beerware
*
* ----------------------------------------------------------------------------
* "THE BEER-WARE LICENSE" (Revision 42) (by Poul-Henning Kamp):
* <joerg@FreeBSD.ORG> wrote this file. As long as you retain this notice you
* can do whatever you want with this stuff. If we meet some day, and you think
* this stuff is worth it, you can buy me a beer in return. Joerg Wunsch
* ----------------------------------------------------------------------------
*/
/*
* Simple demo program to illustrate the handling of FreeBSD's
* libusb20.
*
* Issues a bulk output, and then requests a bulk input.
*/
/*
* Examples:
* Just list all VID:PID pairs
* ./bulk
*
* Say "hello" to an Atmel JTAGICEmkII.
* ./bulk -o 2 -i 0x82 -v 0x03eb -p 0x2103 0x1b 0 0 1 0 0 0 0x0e 1 0xf3 0x97
*
* Return the INQUIRY data of an USB mass storage device.
* (It's best to have the umass(4) driver unloaded while doing such
* experiments, and perform a "usbconfig reset" for the device if it
* gets stuck.)
* ./bulk -v 0x5e3 -p 0x723 -i 0x81 -o 2 0x55 0x53 0x42 0x43 1 2 3 4 31 12 0x80 0x24 0 0 0 0x12 0 0 0 36 0 0 0 0 0 0 0 0 0 0
*/
#include <limits.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <sysexits.h>
#include <unistd.h>
#include <libusb20.h>
#include <libusb20_desc.h>
#include "util.h"
/*
* If you want to see the details of the internal datastructures
* in the debugger, unifdef the following.
*/
#ifdef DEBUG
# include <sys/queue.h>
# include "/usr/src/lib/libusb/libusb20_int.h"
#endif
#define BUFLEN 64
#define TIMEOUT 5000 /* 5 s */
int in_ep, out_ep; /* endpoints */
uint8_t out_buf[BUFLEN];
uint16_t out_len;
static void
doit(struct libusb20_device *dev)
{
int rv;
/*
* Open the device, allocating memory for two possible (bulk or
* interrupt) transfers.
*
* If only control transfers are intended (via
* libusb20_dev_request_sync()), transfer_max can be given as 0.
*/
if ((rv = libusb20_dev_open(dev, 2)) != 0)
{
fprintf(stderr, "libusb20_dev_open: %s\n", libusb20_strerror(rv));
return;
}
/*
* If the device has more than one configuration, select the desired
* one here.
*/
if ((rv = libusb20_dev_set_config_index(dev, 0)) != 0)
{
fprintf(stderr, "libusb20_dev_set_config_index: %s\n", libusb20_strerror(rv));
return;
}
/*
* Two transfers have been requested in libusb20_dev_open() above;
* obtain the corresponding transfer struct pointers.
*/
struct libusb20_transfer *xfr_out = libusb20_tr_get_pointer(dev, 0);
struct libusb20_transfer *xfr_in = libusb20_tr_get_pointer(dev, 1);
if (xfr_in == NULL || xfr_out == NULL)
{
fprintf(stderr, "libusb20_tr_get_pointer: %s\n", libusb20_strerror(rv));
return;
}
/*
* Open both transfers, the "out" one for the write endpoint, the
* "in" one for the read endpoint (ep | 0x80).
*/
if ((rv = libusb20_tr_open(xfr_out, 0, 1, out_ep)) != 0)
{
fprintf(stderr, "libusb20_tr_open: %s\n", libusb20_strerror(rv));
return;
}
if ((rv = libusb20_tr_open(xfr_in, 0, 1, in_ep)) != 0)
{
fprintf(stderr, "libusb20_tr_open: %s\n", libusb20_strerror(rv));
return;
}
uint8_t in_buf[BUFLEN];
uint32_t rlen;
if (out_len > 0)
{
if ((rv = libusb20_tr_bulk_intr_sync(xfr_out, out_buf, out_len, &rlen, TIMEOUT))
!= 0)
{
fprintf(stderr, "libusb20_tr_bulk_intr_sync (OUT): %s\n", libusb20_strerror(rv));
}
printf("sent %d bytes\n", rlen);
}
if ((rv = libusb20_tr_bulk_intr_sync(xfr_in, in_buf, BUFLEN, &rlen, TIMEOUT))
!= 0)
{
fprintf(stderr, "libusb20_tr_bulk_intr_sync: %s\n", libusb20_strerror(rv));
}
printf("received %d bytes\n", rlen);
if (rlen > 0)
print_formatted(in_buf, rlen);
libusb20_tr_close(xfr_out);
libusb20_tr_close(xfr_in);
libusb20_dev_close(dev);
}
static void
usage(void)
{
fprintf(stderr,
"Usage ./usb -i <IN_EP> -o <OUT_EP> -v <VID> -p <PID> [<outdata> ...\n]");
exit(EX_USAGE);
}
int
main(int argc, char **argv)
{
unsigned int vid = UINT_MAX, pid = UINT_MAX; /* impossible VID:PID */
int c;
while ((c = getopt(argc, argv, "i:o:p:v:")) != -1)
switch (c)
{
case 'i':
in_ep = strtol(optarg, NULL, 0);
break;
case 'o':
out_ep = strtol(optarg, NULL, 0);
break;
case 'p':
pid = strtol(optarg, NULL, 0);
break;
case 'v':
vid = strtol(optarg, NULL, 0);
break;
default:
usage();
break;
}
argc -= optind;
argv += optind;
if (vid != UINT_MAX || pid != UINT_MAX)
{
if (in_ep == 0 || out_ep == 0)
{
usage();
}
if ((in_ep & 0x80) == 0)
{
fprintf(stderr, "IN_EP must have bit 7 set\n");
return (EX_USAGE);
}
if (argc > 0)
{
for (out_len = 0; argc > 0 && out_len < BUFLEN; out_len++, argc--)
{
unsigned n = strtoul(argv[out_len], 0, 0);
if (n > 255)
fprintf(stderr,
"Warning: data #%d 0x%0x > 0xff, truncating\n",
out_len, n);
out_buf[out_len] = (uint8_t)n;
}
out_len++;
if (argc > 0)
fprintf(stderr,
"Data count exceeds maximum of %d, ignoring %d elements\n",
BUFLEN, optind);
}
}
struct libusb20_backend *be;
struct libusb20_device *dev;
if ((be = libusb20_be_alloc_default()) == NULL)
{
perror("libusb20_be_alloc()");
return 1;
}
dev = NULL;
while ((dev = libusb20_be_device_foreach(be, dev)) != NULL)
{
struct LIBUSB20_DEVICE_DESC_DECODED *ddp =
libusb20_dev_get_device_desc(dev);
printf("Found device %s (VID:PID = 0x%04x:0x%04x)\n",
libusb20_dev_get_desc(dev),
ddp->idVendor, ddp->idProduct);
if (ddp->idVendor == vid && ddp->idProduct == pid)
doit(dev);
}
libusb20_be_free(be);
return 0;
}
plain