203 lines
8.5 KiB
C
203 lines
8.5 KiB
C
/* Name: opendevice.c
|
|
* Project: V-USB host-side library
|
|
* Author: Christian Starkjohann
|
|
* Creation Date: 2008-04-10
|
|
* Tabsize: 4
|
|
* Copyright: (c) 2008 by OBJECTIVE DEVELOPMENT Software GmbH
|
|
* License: GNU GPL v2 (see License.txt), GNU GPL v3 or proprietary (CommercialLicense.txt)
|
|
* This Revision: $Id: opendevice.c 740 2009-04-13 18:23:31Z cs $
|
|
*/
|
|
|
|
/*
|
|
General Description:
|
|
The functions in this module can be used to find and open a device based on
|
|
libusb or libusb-win32.
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include "opendevice.h"
|
|
|
|
/* ------------------------------------------------------------------------- */
|
|
|
|
#define MATCH_SUCCESS 1
|
|
#define MATCH_FAILED 0
|
|
#define MATCH_ABORT -1
|
|
|
|
/* private interface: match text and p, return MATCH_SUCCESS, MATCH_FAILED, or MATCH_ABORT. */
|
|
static int _shellStyleMatch(char *text, char *p)
|
|
{
|
|
int last, matched, reverse;
|
|
|
|
for(; *p; text++, p++){
|
|
if(*text == 0 && *p != '*')
|
|
return MATCH_ABORT;
|
|
switch(*p){
|
|
case '\\':
|
|
/* Literal match with following character. */
|
|
p++;
|
|
/* FALLTHROUGH */
|
|
default:
|
|
if(*text != *p)
|
|
return MATCH_FAILED;
|
|
continue;
|
|
case '?':
|
|
/* Match anything. */
|
|
continue;
|
|
case '*':
|
|
while(*++p == '*')
|
|
/* Consecutive stars act just like one. */
|
|
continue;
|
|
if(*p == 0)
|
|
/* Trailing star matches everything. */
|
|
return MATCH_SUCCESS;
|
|
while(*text)
|
|
if((matched = _shellStyleMatch(text++, p)) != MATCH_FAILED)
|
|
return matched;
|
|
return MATCH_ABORT;
|
|
case '[':
|
|
reverse = p[1] == '^';
|
|
if(reverse) /* Inverted character class. */
|
|
p++;
|
|
matched = MATCH_FAILED;
|
|
if(p[1] == ']' || p[1] == '-')
|
|
if(*++p == *text)
|
|
matched = MATCH_SUCCESS;
|
|
for(last = *p; *++p && *p != ']'; last = *p)
|
|
if (*p == '-' && p[1] != ']' ? *text <= *++p && *text >= last : *text == *p)
|
|
matched = MATCH_SUCCESS;
|
|
if(matched == reverse)
|
|
return MATCH_FAILED;
|
|
continue;
|
|
}
|
|
}
|
|
return *text == 0;
|
|
}
|
|
|
|
/* public interface for shell style matching: returns 0 if fails, 1 if matches */
|
|
static int shellStyleMatch(char *text, char *pattern)
|
|
{
|
|
if(pattern == NULL) /* NULL pattern is synonymous to "*" */
|
|
return 1;
|
|
return _shellStyleMatch(text, pattern) == MATCH_SUCCESS;
|
|
}
|
|
|
|
/* ------------------------------------------------------------------------- */
|
|
|
|
int usbGetStringAscii(usb_dev_handle *dev, int index, char *buf, int buflen)
|
|
{
|
|
char buffer[256];
|
|
int rval, i;
|
|
|
|
if((rval = usb_get_string_simple(dev, index, buf, buflen)) >= 0) /* use libusb version if it works */
|
|
return rval;
|
|
if((rval = usb_control_msg(dev, USB_ENDPOINT_IN, USB_REQ_GET_DESCRIPTOR, (USB_DT_STRING << 8) + index, 0x0409, buffer, sizeof(buffer), 5000)) < 0)
|
|
return rval;
|
|
if(buffer[1] != USB_DT_STRING){
|
|
*buf = 0;
|
|
return 0;
|
|
}
|
|
if((unsigned char)buffer[0] < rval)
|
|
rval = (unsigned char)buffer[0];
|
|
rval /= 2;
|
|
/* lossy conversion to ISO Latin1: */
|
|
for(i=1;i<rval;i++){
|
|
if(i > buflen) /* destination buffer overflow */
|
|
break;
|
|
buf[i-1] = buffer[2 * i];
|
|
if(buffer[2 * i + 1] != 0) /* outside of ISO Latin1 range */
|
|
buf[i-1] = '?';
|
|
}
|
|
buf[i-1] = 0;
|
|
return i-1;
|
|
}
|
|
|
|
/* ------------------------------------------------------------------------- */
|
|
|
|
int usbOpenDevice(usb_dev_handle **device, int vendorID, char *vendorNamePattern, int productID, char *productNamePattern, char *serialNamePattern, FILE *printMatchingDevicesFp, FILE *warningsFp)
|
|
{
|
|
struct usb_bus *bus;
|
|
struct usb_device *dev;
|
|
usb_dev_handle *handle = NULL;
|
|
int errorCode = USBOPEN_ERR_NOTFOUND;
|
|
|
|
usb_find_busses();
|
|
usb_find_devices();
|
|
for(bus = usb_get_busses(); bus; bus = bus->next){
|
|
for(dev = bus->devices; dev; dev = dev->next){ /* iterate over all devices on all busses */
|
|
if((vendorID == 0 || dev->descriptor.idVendor == vendorID)
|
|
&& (productID == 0 || dev->descriptor.idProduct == productID)){
|
|
char vendor[256], product[256], serial[256];
|
|
int len;
|
|
handle = usb_open(dev); /* we need to open the device in order to query strings */
|
|
if(!handle){
|
|
errorCode = USBOPEN_ERR_ACCESS;
|
|
if(warningsFp != NULL)
|
|
fprintf(warningsFp, "Warning: cannot open VID=0x%04x PID=0x%04x: %s\n", dev->descriptor.idVendor, dev->descriptor.idProduct, usb_strerror());
|
|
continue;
|
|
}
|
|
/* now check whether the names match: */
|
|
len = vendor[0] = 0;
|
|
if(dev->descriptor.iManufacturer > 0){
|
|
len = usbGetStringAscii(handle, dev->descriptor.iManufacturer, vendor, sizeof(vendor));
|
|
}
|
|
if(len < 0){
|
|
errorCode = USBOPEN_ERR_ACCESS;
|
|
if(warningsFp != NULL)
|
|
fprintf(warningsFp, "Warning: cannot query manufacturer for VID=0x%04x PID=0x%04x: %s\n", dev->descriptor.idVendor, dev->descriptor.idProduct, usb_strerror());
|
|
}else{
|
|
errorCode = USBOPEN_ERR_NOTFOUND;
|
|
/* printf("seen device from vendor ->%s<-\n", vendor); */
|
|
if(shellStyleMatch(vendor, vendorNamePattern)){
|
|
len = product[0] = 0;
|
|
if(dev->descriptor.iProduct > 0){
|
|
len = usbGetStringAscii(handle, dev->descriptor.iProduct, product, sizeof(product));
|
|
}
|
|
if(len < 0){
|
|
errorCode = USBOPEN_ERR_ACCESS;
|
|
if(warningsFp != NULL)
|
|
fprintf(warningsFp, "Warning: cannot query product for VID=0x%04x PID=0x%04x: %s\n", dev->descriptor.idVendor, dev->descriptor.idProduct, usb_strerror());
|
|
}else{
|
|
errorCode = USBOPEN_ERR_NOTFOUND;
|
|
/* printf("seen product ->%s<-\n", product); */
|
|
if(shellStyleMatch(product, productNamePattern)){
|
|
len = serial[0] = 0;
|
|
if(dev->descriptor.iSerialNumber > 0){
|
|
len = usbGetStringAscii(handle, dev->descriptor.iSerialNumber, serial, sizeof(serial));
|
|
}
|
|
if(len < 0){
|
|
errorCode = USBOPEN_ERR_ACCESS;
|
|
if(warningsFp != NULL)
|
|
fprintf(warningsFp, "Warning: cannot query serial for VID=0x%04x PID=0x%04x: %s\n", dev->descriptor.idVendor, dev->descriptor.idProduct, usb_strerror());
|
|
}
|
|
if(shellStyleMatch(serial, serialNamePattern)){
|
|
if(printMatchingDevicesFp != NULL){
|
|
if(serial[0] == 0){
|
|
fprintf(printMatchingDevicesFp, "VID=0x%04x PID=0x%04x vendor=\"%s\" product=\"%s\"\n", dev->descriptor.idVendor, dev->descriptor.idProduct, vendor, product);
|
|
}else{
|
|
fprintf(printMatchingDevicesFp, "VID=0x%04x PID=0x%04x vendor=\"%s\" product=\"%s\" serial=\"%s\"\n", dev->descriptor.idVendor, dev->descriptor.idProduct, vendor, product, serial);
|
|
}
|
|
}else{
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
usb_close(handle);
|
|
handle = NULL;
|
|
}
|
|
}
|
|
if(handle) /* we have found a deice */
|
|
break;
|
|
}
|
|
if(handle != NULL){
|
|
errorCode = 0;
|
|
*device = handle;
|
|
}
|
|
if(printMatchingDevicesFp != NULL) /* never return an error for listing only */
|
|
errorCode = 0;
|
|
return errorCode;
|
|
}
|
|
|
|
/* ------------------------------------------------------------------------- */
|