211 lines
10 KiB
C++
211 lines
10 KiB
C++
/* Copyright (C) 2011 Circuits At Home, LTD. All rights reserved.
|
|
|
|
This software may be distributed and modified under the terms of the GNU
|
|
General Public License version 2 (GPL2) as published by the Free Software
|
|
Foundation and appearing in the file GPL2.TXT included in the packaging of
|
|
this file. Please note that GPL2 Section 2[b] requires that all works based
|
|
on this software must also be made publicly available under the terms of
|
|
the GPL2 ("Copyleft").
|
|
|
|
Contact information
|
|
-------------------
|
|
|
|
Circuits At Home, LTD
|
|
Web : http://www.circuitsathome.com
|
|
e-mail : support@circuitsathome.com
|
|
*/
|
|
#if !defined(_usb_h_) || defined(__CONFDESCPARSER_H__)
|
|
#error "Never include confdescparser.h directly; include Usb.h instead"
|
|
#else
|
|
|
|
#define __CONFDESCPARSER_H__
|
|
|
|
class UsbConfigXtracter {
|
|
public:
|
|
//virtual void ConfigXtract(const USB_CONFIGURATION_DESCRIPTOR *conf) = 0;
|
|
//virtual void InterfaceXtract(uint8_t conf, const USB_INTERFACE_DESCRIPTOR *iface) = 0;
|
|
|
|
virtual void EndpointXtract(uint8_t conf __attribute__((unused)), uint8_t iface __attribute__((unused)), uint8_t alt __attribute__((unused)), uint8_t proto __attribute__((unused)), const USB_ENDPOINT_DESCRIPTOR *ep __attribute__((unused))) {
|
|
};
|
|
};
|
|
|
|
#define CP_MASK_COMPARE_CLASS 1
|
|
#define CP_MASK_COMPARE_SUBCLASS 2
|
|
#define CP_MASK_COMPARE_PROTOCOL 4
|
|
#define CP_MASK_COMPARE_ALL 7
|
|
|
|
// Configuration Descriptor Parser Class Template
|
|
|
|
template <const uint8_t CLASS_ID, const uint8_t SUBCLASS_ID, const uint8_t PROTOCOL_ID, const uint8_t MASK>
|
|
class ConfigDescParser : public USBReadParser {
|
|
UsbConfigXtracter *theXtractor;
|
|
MultiValueBuffer theBuffer;
|
|
MultiByteValueParser valParser;
|
|
ByteSkipper theSkipper;
|
|
uint8_t varBuffer[16 /*sizeof(USB_CONFIGURATION_DESCRIPTOR)*/];
|
|
|
|
uint8_t stateParseDescr; // ParseDescriptor state
|
|
|
|
uint8_t dscrLen; // Descriptor length
|
|
uint8_t dscrType; // Descriptor type
|
|
|
|
bool isGoodInterface; // Apropriate interface flag
|
|
uint8_t confValue; // Configuration value
|
|
uint8_t protoValue; // Protocol value
|
|
uint8_t ifaceNumber; // Interface number
|
|
uint8_t ifaceAltSet; // Interface alternate settings
|
|
|
|
bool UseOr;
|
|
bool ParseDescriptor(uint8_t **pp, uint16_t *pcntdn);
|
|
void PrintHidDescriptor(const USB_HID_DESCRIPTOR *pDesc);
|
|
|
|
public:
|
|
|
|
void SetOR(void) {
|
|
UseOr = true;
|
|
}
|
|
ConfigDescParser(UsbConfigXtracter *xtractor);
|
|
void Parse(const uint16_t len, const uint8_t *pbuf, const uint16_t &offset);
|
|
};
|
|
|
|
template <const uint8_t CLASS_ID, const uint8_t SUBCLASS_ID, const uint8_t PROTOCOL_ID, const uint8_t MASK>
|
|
ConfigDescParser<CLASS_ID, SUBCLASS_ID, PROTOCOL_ID, MASK>::ConfigDescParser(UsbConfigXtracter *xtractor) :
|
|
theXtractor(xtractor),
|
|
stateParseDescr(0),
|
|
dscrLen(0),
|
|
dscrType(0),
|
|
UseOr(false) {
|
|
theBuffer.pValue = varBuffer;
|
|
valParser.Initialize(&theBuffer);
|
|
theSkipper.Initialize(&theBuffer);
|
|
};
|
|
|
|
template <const uint8_t CLASS_ID, const uint8_t SUBCLASS_ID, const uint8_t PROTOCOL_ID, const uint8_t MASK>
|
|
void ConfigDescParser<CLASS_ID, SUBCLASS_ID, PROTOCOL_ID, MASK>::Parse(const uint16_t len, const uint8_t *pbuf, const uint16_t &offset __attribute__((unused))) {
|
|
uint16_t cntdn = (uint16_t)len;
|
|
uint8_t *p = (uint8_t*)pbuf;
|
|
|
|
while(cntdn)
|
|
if(!ParseDescriptor(&p, &cntdn))
|
|
return;
|
|
}
|
|
|
|
/* Parser for the configuration descriptor. Takes values for class, subclass, protocol fields in interface descriptor and
|
|
compare masks for them. When the match is found, calls EndpointXtract passing buffer containing endpoint descriptor */
|
|
template <const uint8_t CLASS_ID, const uint8_t SUBCLASS_ID, const uint8_t PROTOCOL_ID, const uint8_t MASK>
|
|
bool ConfigDescParser<CLASS_ID, SUBCLASS_ID, PROTOCOL_ID, MASK>::ParseDescriptor(uint8_t **pp, uint16_t *pcntdn) {
|
|
USB_CONFIGURATION_DESCRIPTOR* ucd = reinterpret_cast<USB_CONFIGURATION_DESCRIPTOR*>(varBuffer);
|
|
USB_INTERFACE_DESCRIPTOR* uid = reinterpret_cast<USB_INTERFACE_DESCRIPTOR*>(varBuffer);
|
|
switch(stateParseDescr) {
|
|
case 0:
|
|
theBuffer.valueSize = 2;
|
|
valParser.Initialize(&theBuffer);
|
|
stateParseDescr = 1;
|
|
case 1:
|
|
if(!valParser.Parse(pp, pcntdn))
|
|
return false;
|
|
dscrLen = *((uint8_t*)theBuffer.pValue);
|
|
dscrType = *((uint8_t*)theBuffer.pValue + 1);
|
|
stateParseDescr = 2;
|
|
case 2:
|
|
// This is a sort of hack. Assuming that two bytes are all ready in the buffer
|
|
// the pointer is positioned two bytes ahead in order for the rest of descriptor
|
|
// to be read right after the size and the type fields.
|
|
// This should be used carefully. varBuffer should be used directly to handle data
|
|
// in the buffer.
|
|
theBuffer.pValue = varBuffer + 2;
|
|
stateParseDescr = 3;
|
|
case 3:
|
|
switch(dscrType) {
|
|
case USB_DESCRIPTOR_INTERFACE:
|
|
isGoodInterface = false;
|
|
break;
|
|
case USB_DESCRIPTOR_CONFIGURATION:
|
|
case USB_DESCRIPTOR_ENDPOINT:
|
|
case HID_DESCRIPTOR_HID:
|
|
break;
|
|
}
|
|
theBuffer.valueSize = dscrLen - 2;
|
|
valParser.Initialize(&theBuffer);
|
|
stateParseDescr = 4;
|
|
case 4:
|
|
switch(dscrType) {
|
|
case USB_DESCRIPTOR_CONFIGURATION:
|
|
if(!valParser.Parse(pp, pcntdn))
|
|
return false;
|
|
confValue = ucd->bConfigurationValue;
|
|
break;
|
|
case USB_DESCRIPTOR_INTERFACE:
|
|
if(!valParser.Parse(pp, pcntdn))
|
|
return false;
|
|
if((MASK & CP_MASK_COMPARE_CLASS) && uid->bInterfaceClass != CLASS_ID)
|
|
break;
|
|
if((MASK & CP_MASK_COMPARE_SUBCLASS) && uid->bInterfaceSubClass != SUBCLASS_ID)
|
|
break;
|
|
if(UseOr) {
|
|
if((!((MASK & CP_MASK_COMPARE_PROTOCOL) && uid->bInterfaceProtocol)))
|
|
break;
|
|
} else {
|
|
if((MASK & CP_MASK_COMPARE_PROTOCOL) && uid->bInterfaceProtocol != PROTOCOL_ID)
|
|
break;
|
|
}
|
|
isGoodInterface = true;
|
|
ifaceNumber = uid->bInterfaceNumber;
|
|
ifaceAltSet = uid->bAlternateSetting;
|
|
protoValue = uid->bInterfaceProtocol;
|
|
break;
|
|
case USB_DESCRIPTOR_ENDPOINT:
|
|
if(!valParser.Parse(pp, pcntdn))
|
|
return false;
|
|
if(isGoodInterface)
|
|
if(theXtractor)
|
|
theXtractor->EndpointXtract(confValue, ifaceNumber, ifaceAltSet, protoValue, (USB_ENDPOINT_DESCRIPTOR*)varBuffer);
|
|
break;
|
|
//case HID_DESCRIPTOR_HID:
|
|
// if (!valParser.Parse(pp, pcntdn))
|
|
// return false;
|
|
// PrintHidDescriptor((const USB_HID_DESCRIPTOR*)varBuffer);
|
|
// break;
|
|
default:
|
|
if(!theSkipper.Skip(pp, pcntdn, dscrLen - 2))
|
|
return false;
|
|
}
|
|
theBuffer.pValue = varBuffer;
|
|
stateParseDescr = 0;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
template <const uint8_t CLASS_ID, const uint8_t SUBCLASS_ID, const uint8_t PROTOCOL_ID, const uint8_t MASK>
|
|
void ConfigDescParser<CLASS_ID, SUBCLASS_ID, PROTOCOL_ID, MASK>::PrintHidDescriptor(const USB_HID_DESCRIPTOR *pDesc) {
|
|
Notify(PSTR("\r\n\r\nHID Descriptor:\r\n"), 0x80);
|
|
Notify(PSTR("bDescLength:\t\t"), 0x80);
|
|
PrintHex<uint8_t > (pDesc->bLength, 0x80);
|
|
|
|
Notify(PSTR("\r\nbDescriptorType:\t"), 0x80);
|
|
PrintHex<uint8_t > (pDesc->bDescriptorType, 0x80);
|
|
|
|
Notify(PSTR("\r\nbcdHID:\t\t\t"), 0x80);
|
|
PrintHex<uint16_t > (pDesc->bcdHID, 0x80);
|
|
|
|
Notify(PSTR("\r\nbCountryCode:\t\t"), 0x80);
|
|
PrintHex<uint8_t > (pDesc->bCountryCode, 0x80);
|
|
|
|
Notify(PSTR("\r\nbNumDescriptors:\t"), 0x80);
|
|
PrintHex<uint8_t > (pDesc->bNumDescriptors, 0x80);
|
|
|
|
for(uint8_t i = 0; i < pDesc->bNumDescriptors; i++) {
|
|
HID_CLASS_DESCRIPTOR_LEN_AND_TYPE *pLT = (HID_CLASS_DESCRIPTOR_LEN_AND_TYPE*)&(pDesc->bDescrType);
|
|
|
|
Notify(PSTR("\r\nbDescrType:\t\t"), 0x80);
|
|
PrintHex<uint8_t > (pLT[i].bDescrType, 0x80);
|
|
|
|
Notify(PSTR("\r\nwDescriptorLength:\t"), 0x80);
|
|
PrintHex<uint16_t > (pLT[i].wDescriptorLength, 0x80);
|
|
}
|
|
Notify(PSTR("\r\n"), 0x80);
|
|
}
|
|
|
|
|
|
#endif // __CONFDESCPARSER_H__
|