-/**
- * @brief This method should be called when sending a new command to the pm3. In case any old
- * responses from previous commands are stored in the buffer, a call to this method should clear them.
- * A better method could have been to have explicit command-ACKS, so we can know which ACK goes to which
- * operation. Right now we'll just have to live with this.
- */
-void clearCommandBuffer()
-{
- //This is a very simple operation
- pthread_mutex_lock(&cmdBufferMutex);
- cmd_tail = cmd_head;
- pthread_mutex_unlock(&cmdBufferMutex);
-}
-
-/**
- * @brief storeCommand stores a USB command in a circular buffer
- * @param UC
- */
-void storeCommand(UsbCommand *command)
-{
- pthread_mutex_lock(&cmdBufferMutex);
- if( ( cmd_head+1) % CMD_BUFFER_SIZE == cmd_tail)
- {
- //If these two are equal, we're about to overwrite in the
- // circular buffer.
- PrintAndLog("WARNING: Command buffer about to overwrite command! This needs to be fixed!");
- }
- //Store the command at the 'head' location
- UsbCommand* destination = &cmdBuffer[cmd_head];
- memcpy(destination, command, sizeof(UsbCommand));
-
- cmd_head = (cmd_head +1) % CMD_BUFFER_SIZE; //increment head and wrap
- pthread_mutex_unlock(&cmdBufferMutex);
-}
-
-
-/**
- * @brief getCommand gets a command from an internal circular buffer.
- * @param response location to write command
- * @return 1 if response was returned, 0 if nothing has been received
- */
-int getCommand(UsbCommand* response)
-{
- pthread_mutex_lock(&cmdBufferMutex);
- //If head == tail, there's nothing to read, or if we just got initialized
- if(cmd_head == cmd_tail){
- pthread_mutex_unlock(&cmdBufferMutex);
- return 0;
- }
- //Pick out the next unread command
- UsbCommand* last_unread = &cmdBuffer[cmd_tail];
- memcpy(response, last_unread, sizeof(UsbCommand));
- //Increment tail - this is a circular buffer, so modulo buffer size
- cmd_tail = (cmd_tail +1 ) % CMD_BUFFER_SIZE;
- pthread_mutex_unlock(&cmdBufferMutex);
- return 1;
-}
-
-
-/**
- * Waits for a certain response type. This method waits for a maximum of
- * ms_timeout milliseconds for a specified response command.
- *@brief WaitForResponseTimeout
- * @param cmd command to wait for
- * @param response struct to copy received command into.
- * @param ms_timeout
- * @return true if command was returned, otherwise false
- */
-bool WaitForResponseTimeoutW(uint32_t cmd, UsbCommand* response, size_t ms_timeout, bool show_warning) {
-
- UsbCommand resp;
-
- if (response == NULL) {
- response = &resp;
- }
-
- uint64_t start_time = msclock();
-
- // Wait until the command is received
- while (true) {
- while(getCommand(response)) {
- if(response->cmd == cmd){
- return true;
- }
- }
- if (msclock() - start_time > ms_timeout) {
- break;
- }
- if (msclock() - start_time > 2000 && show_warning) {
- PrintAndLog("Waiting for a response from the proxmark...");
- PrintAndLog("You can cancel this operation by pressing the pm3 button");
- show_warning = false;
- }
- }
- return false;
-}
-
-
-bool WaitForResponseTimeout(uint32_t cmd, UsbCommand* response, size_t ms_timeout) {
- return WaitForResponseTimeoutW(cmd, response, ms_timeout, true);
-}
-
-bool WaitForResponse(uint32_t cmd, UsbCommand* response) {
- return WaitForResponseTimeoutW(cmd, response, -1, true);
-}
-
-
projects / proxmark3-svn / blobdiff