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/*
* Copyright 2012 Bjørn Mork <bjorn@mork.no>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License.
*/
#include <stdio.h>
#include <errno.h>
#include <stdlib.h>
#include <unistd.h>
#include <getopt.h>
#include <string.h>
#include <libusb.h>
#include <linux/types.h>
/* dump device info */
static void print_usb_device(libusb_device_handle *handle)
{
libusb_device *dev;
struct libusb_device_descriptor desc;
int err;
dev = libusb_get_device(handle);
if (dev == NULL)
return;
err = libusb_get_device_descriptor(dev, &desc);
if (err)
return;
printf("bLength=%d\nbDescriptorType=%d\nbDeviceClass=%x\nidVendor=%04x\nidProduct=%04x\n",
desc.bLength, desc.bDescriptorType, desc.bDeviceClass, desc.idVendor, desc.idProduct);
}
/* open the given device */
static libusb_device_handle *open_device(char *device)
{
uint16_t vendor_id = 0, product_id = 0;
if ((sscanf(device, " %hx : %hx ", &vendor_id, &product_id) != 2) || (vendor_id == 0) || (product_id == 0))
return NULL;
return libusb_open_device_with_vid_pid(NULL, vendor_id, product_id);
}
static int read_reply(libusb_device_handle *handle, int interface, char *buf, int size)
{
int ret;
ret = libusb_control_transfer(handle,
LIBUSB_ENDPOINT_IN + LIBUSB_REQUEST_TYPE_CLASS + LIBUSB_RECIPIENT_INTERFACE, /* 0xa1 */
1, /* CDC GET_ENCAPSULATED_RESPONSE */
0, /* zero */
interface, /* wIndex = interface */
buf,
size,
1000);
if (ret >= (int)sizeof(struct qmux)) {
fprintf(stderr, "\n== %s() returned %d bytes ==\n", __FUNCTION__, ret);
dump_qmux(buf);
}
fprintf(stderr, "%s: libusb_control_transfer() returned %d\n", __FUNCTION__, ret);
return ret;
}
/* send control message to the device */
static int send_msg(libusb_device_handle *handle, int interface, char *buf, int size)
{
int ret;
fprintf(stderr, "\n== %s() ==\n", __FUNCTION__);
dump_qmux(buf);
ret = libusb_control_transfer(handle,
LIBUSB_REQUEST_TYPE_CLASS + LIBUSB_RECIPIENT_INTERFACE, /* 0x21 */
0, /* CDC SEND_ENCAPSULATED_COMMAND */
0, /* zero */
interface, /* wIndex = interface */
buf,
size,
1000);
fprintf(stderr, "%s: libusb_control_transfer() returned %d\n", __FUNCTION__, ret);
return ret;
}
static struct option main_options[] = {
{ "help", 0, 0, 'h' },
{ 0, 0, 0, 0 }
};
void usage(char *prog)
{
fprintf(stderr, "Usage: %s vid:pid\n\n", prog);
}
int main(int argc, char *argv[])
{
char *prog, *device = NULL;
int i, opt, ret, interface;
libusb_device_handle *handle;
char buf[500];
int size = sizeof(buf), len;
unsigned char cid = 0;
prog = argv[0];
while ((opt = getopt_long(argc, argv, "h", main_options, NULL)) != -1) {
switch(opt) {
case 'h':
usage(prog);
exit(0);
}
}
if (optind >= argc) {
usage(prog);
exit(0);
}
device = strdup(argv[optind]);
if (ret = libusb_init(NULL)) {
fprintf(stderr, "libusb_init() failed: %d\n", ret);
exit(1);
}
if (handle = open_device(device)) {
/* FIXME: for each interface:
- ignore if bound
- ignore unless containing interrupt endpoint (and either bulk in+out or nothing else?)
*/
ret = libusb_claim_interface (handle, interface);
/* just send a static release cid=0 for system=255 to trigger a
QMI_ERR_INVALID_SERVICE_TYPE error
*/
unsigned char req[0x11] = { 0x01, // .tf (always 1)
0x10, 0x00, // .len (excl .tf)
0x00, // .ctrl (control point)
0x00, // .service (QMI_CTL)
0x00, // .cid (irrelevant for QMI_CTL)
0x00, // .flags
0x00, // .txid (don't care)
0x23, 0x00, // .msgid
0x05, 0x00, // .len
0x01, // .tlvid
0x02, 0x00, // .tlvlen
0xff, // .tlv[0] == system (0xff does not exist)
0x0, // .tlv[1] == cid (0 is impossible)
};
/* the expected static reply to the above request is: */
unsigned char reply[0x13] = { 0x01, // .tf (always 1)
0x12, 0x00, // .len (excl .tf)
0x80, // .ctrl (service)
0x00, // .service (QMI_CTL)
0x00, // .cid (irrelevant for QMI_CTL)
0x01, // .flags (QMI_CTL response)
0x00, // .txid
0x23, 0x00, // .msgid
0x07, 0x00, // .len
0x02, // .tlvid
0x04, 0x00, // .tlvlen
0x01, 0x00, // FAILED
0x1f, 0x00, // QMI_ERR_INVALID_SERVICE_TYPE
};
print_usb_device(handle);
i = send_msg(handle, interface, req, sizeof(req));
/* should repeat a few times to flush pending unsolicted messages */
sleep(2); /* just wait enough */
i = read_reply(handle, interface, buf, size);
ret = libusb_release_interface(handle, interface);
} else {
fprintf(stderr, "failed to open device \"%s\"\n", device);
}
libusb_exit(NULL);
}
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