fprintf(outlog, "Found attached driver: %s\n", buffer);		}	        ret = usb_detach_kernel_driver_np(usb_hd, 0);		if (ret != 0) {		        if(!quiet) fprintf(errlog, "ERROR: unsuccessful kernel driver detaching\n");			(void)usb_close(usb_hd);			exit(5);		}	} else {	        /* hopefully no default kernel driver yet running, send only a warning */	        if(!quiet) fprintf(errlog, "WARNING: No kernel driver attached found\n");	}	ret = usb_claim_interface(usb_hd, 0);	if (ret != 0) {		if(!quiet) fprintf(errlog, "ERROR: could not claim interface\n");		(void)usb_close(usb_hd);		exit(6);	}	  	/* findout the Message and Response Endpoint */	        int MessageEndpoint=search_message_endp(usb_dev);	int ResponseEndpoint=search_response_endp(usb_dev);	if (MessageEndpoint == 0) {		if(!quiet) fprintf(errlog, "ERROR: could not detremine Endpoint addresses\n");		(void)usb_close(usb_hd);		exit(6);	}	if (debug) {	        fprintf(outlog,"MessageEndpoint:  0x%x\n", MessageEndpoint);		fprintf(outlog,"ResponseEndpoint:  0x%x \n", ResponseEndpoint);	}	/* preparation to send rezero string */       	(void)usb_clear_halt(usb_hd, MessageEndpoint); //ResponseEndpoint        ret = usb_set_altinterface(usb_hd, 0);	if (ret != 0) {	        if (warno) {		        if(!quiet) fprintf(errlog, "WARNING: unsuccessful set alternative interface\n");		} else {		        if(!quiet) fprintf(errlog, "ERROR: unsuccessful set alternative interface\n");			(void)usb_release_interface(usb_hd, 0);			(void)usb_close(usb_hd);		        exit(7);		}	}	/* usb mass storage setting time (needed by some WWAN modems) */	sleep(1);	if (!test) {	        /* send rezero string */	        ret = usb_bulk_write(usb_hd, MessageEndpoint, (char *)MessageContent, sizeof(MessageContent), 1000);	        if (ret < 0) {	                if (warno) {			        if(!quiet) fprintf(errlog, "WARNING: unsuccessful write rezero string\n");			} else {			        if(!quiet) fprintf(errlog, "ERROR: unsuccessful write rezero string\n");				(void)usb_release_interface(usb_hd, 0);				(void)usb_close(usb_hd);				exit(8);			}		} else {		        if (debug) fprintf(outlog, "Have successfully send ZERO-CD disabling command\n");		}		/* needed by some WWAN modems) */		if (ResponseEndpoint != 0) {		        ret = usb_bulk_read(usb_hd, ResponseEndpoint, buffer, BUFFER_SIZE, 1000);			if (ret < 0 ) {			        if(!quiet) fprintf(errlog, "WARNING: unsuccessful read response message\n");			}		}	}	/* close device */	ret = usb_close(usb_hd);	if (ret < 0) {	        if (warno) {		        if(!quiet) fprintf(errlog, "WARNING: closeing failed\n");		} else {		        if(!quiet) fprintf(errlog, "ERROR: closeing failed\n");			(void)usb_release_interface(usb_hd, 0);			exit(9);		}	}		/* search again to check result. Note that still the search is needed by some WWAN modems! */	for (count = 5; (count>0) && (usb_dev != NULL); count--) {       	        sleep(1);		(void)usb_find_devices();		usb_dev = search_devices(TARGET_VENDOR, TargetProduct, "");	}	if (usb_dev != NULL) {	        if (warno) {		        if(!quiet) fprintf(errlog, "WARNING: Zero-CD device still found\n");		} else {		        if(!quiet) fprintf(errlog, "ERROR: Zero-CD device still found\n");			(void)usb_release_interface(usb_hd, 0);			exit(10);		}	} else {	        if (debug) fprintf(outlog, "Checked successfully ZERO-CD disabled\n");		else if(!quiet) fprintf(outlog, "Successfully ZERO-CD disabled\n");	}	/* relese device */	(void)usb_release_interface(usb_hd, 0);	return 0;}/** * release_usb_device * need for the signal handler to ensure proper usb port close and release * * input param : just a dumy paramter * return      : nothting */void release_usb_device(int param) {	(void)usb_release_interface(usb_hd, 0);	(void)usb_close(usb_hd);}/** * strrcut * string help function, which cuts the string and returns the  * right boundary last 'n' characters from the given string 's' or * an empty string, if the given string length is shorter than 'n' * * input s  : const string * input n  : number of charaacters, which should be left on the  *            right side of the given string * return   : the result (shorten) strinf or empty string */const char *strrcut(const char *s, int n) {        if (strlen(s)>=n) {	        return &(s[strlen(s)-n]);	} else {	        return "";	}}/** * strrcmp * string help function, which is used to compare just the right * part of the given two strings. All other part is just cut away or * not be used for the comparision * * input s1 : const 1st string * input s2 : const 2nd string * return   : the strcmp return value of the shorted given strings */int strrcmp(const char *s1, const char *s2) {      if (strlen(s1)<=strlen(s2)) {	      return strcmp(s1,strrcut(s2,strlen(s1)));      } else {	      return strcmp(strrcut(s1,strlen(s2)),s2);      }}/** search_devices * search function of the vendor and device id. Optional the name can  * be used to compare the right part of found string of the usblib. * * input vendor  : USB vendor id * input product : USB product id * input name    : optional right part of the searched filename or just an empty string * return        : the found usb device structure, which matches the search */struct usb_device* search_devices(int vendor, int product, const char * name) {        struct usb_bus *bus;    	for (bus = usb_get_busses(); bus; bus = bus->next) {		struct usb_device *dev;		for (dev = bus->devices; dev; dev = dev->next) {		        if (dev->descriptor.idVendor == vendor && dev->descriptor.idProduct == product) {			        /* check number of Endpoints, class, subclass and protocol */			        if (debug) {				        fprintf(outlog, "Endpoints: %d  (2)\n", dev->config[0].interface[0].altsetting[0].bNumEndpoints);					fprintf(outlog, "Class:     0x%x  (0x08)\n", dev->config[0].interface[0].altsetting[0].bInterfaceClass);					fprintf(outlog, "SubClass:  0x%x  (0x06)\n", dev->config[0].interface[0].altsetting[0].bInterfaceSubClass);					fprintf(outlog, "Protocol:  0x%x  (0x50)\n", dev->config[0].interface[0].altsetting[0].bInterfaceProtocol);				}				if (   (dev->config[0].interface[0].altsetting[0].bNumEndpoints == 2)				    && (dev->config[0].interface[0].altsetting[0].bInterfaceClass == 0x08)				    && (dev->config[0].interface[0].altsetting[0].bInterfaceSubClass == 0x06)				    && (dev->config[0].interface[0].altsetting[0].bInterfaceProtocol == 0x50) ) {				        if (debug) {					        fprintf(outlog, "Found file name: '%s'\n", dev->filename);						fprintf(outlog, "Required last chars of file name: '%s'\n", name);					}					if (strrcmp(name, dev->filename) == 0) {					        if (debug) fprintf(outlog, "UMS interface found\n");						return dev;					} else {					        if (debug) fprintf(outlog, "UMS interface found, but its wrong\n");					}				}			}		}	}	return NULL;}/** * search_message_endp * looks inside the USB descriptor stuff for the needed endpoint address.  * It searches explicit for an bulk output interface and returns the address * or even zero * * input dev : usb device structure * return    : endpoint address of 0, if it is no bulk output endpoint */int search_message_endp(struct usb_device *dev) {        if (  ((dev->config[0].interface[0].altsetting[0].endpoint[0].bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_BULK)	    &&((dev->config[0].interface[0].altsetting[0].endpoint[0].bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT)) {	        return dev->config[0].interface[0].altsetting[0].endpoint[0].bEndpointAddress; 	} else 	        if (  ((dev->config[0].interface[0].altsetting[0].endpoint[1].bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_BULK)	            &&((dev->config[0].interface[0].altsetting[0].endpoint[1].bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT)) {	                return dev->config[0].interface[0].altsetting[0].endpoint[1].bEndpointAddress;	}	return 0;}/** * search_response_endp * looks inside the USB descriptor stuff for the needed endpoint address.  * It searches explicit for an bulk input interface and returns the address * or even zero * * input dev : usb device structure * return    : endpoint address of 0, if it is no bulk input endpoint */int search_response_endp(struct usb_device *dev) {        if (  ((dev->config[0].interface[0].altsetting[0].endpoint[0].bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_BULK)	    &&((dev->config[0].interface[0].altsetting[0].endpoint[0].bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_IN)) {	        return dev->config[0].interface[0].altsetting[0].endpoint[0].bEndpointAddress; 	} else 	        if (  ((dev->config[0].interface[0].altsetting[0].endpoint[1].bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_BULK)	            &&((dev->config[0].interface[0].altsetting[0].endpoint[1].bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_IN)) {	                return dev->config[0].interface[0].altsetting[0].endpoint[1].bEndpointAddress;	}	return 0;}