X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/afdcb8c159a73aba95a017f1cfec98e8fa2b93c1..refs/pull/580/head:/client/cmdmain.c diff --git a/client/cmdmain.c b/client/cmdmain.c index e199e127..8d9313f9 100644 --- a/client/cmdmain.c +++ b/client/cmdmain.c @@ -27,15 +27,22 @@ #include "util.h" #include "util_posix.h" #include "cmdscript.h" -#include "cmdcrc.h" unsigned int current_command = CMD_UNKNOWN; static int CmdHelp(const char *Cmd); static int CmdQuit(const char *Cmd); -static int CmdRev(const char *Cmd); +//For storing command that are received from the device +#define CMD_BUFFER_SIZE 50 +static UsbCommand cmdBuffer[CMD_BUFFER_SIZE]; +//Points to the next empty position to write to +static int cmd_head;//Starts as 0 +//Points to the position of the last unread command +static int cmd_tail;//Starts as 0 +// to lock cmdBuffer operations from different threads +static pthread_mutex_t cmdBufferMutex = PTHREAD_MUTEX_INITIALIZER; static command_t CommandTable[] = { @@ -44,7 +51,6 @@ static command_t CommandTable[] = {"hf", CmdHF, 1, "{ High Frequency commands... }"}, {"hw", CmdHW, 1, "{ Hardware commands... }"}, {"lf", CmdLF, 1, "{ Low Frequency commands... }"}, - {"reveng",CmdRev, 1, "Crc calculations from the software reveng1-30"}, {"script",CmdScript,1, "{ Scripting commands }"}, {"quit", CmdQuit, 1, "Exit program"}, {"exit", CmdQuit, 1, "Exit program"}, @@ -55,7 +61,6 @@ command_t* getTopLevelCommandTable() { return CommandTable; } - int CmdHelp(const char *Cmd) { CmdsHelp(CommandTable); @@ -67,12 +72,113 @@ int CmdQuit(const char *Cmd) return 99; } -int CmdRev(const char *Cmd) +/** + * @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() { - CmdCrc(Cmd); - return 0; + //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); } + //----------------------------------------------------------------------------- // Entry point into our code: called whenever the user types a command and // then presses Enter, which the full command line that they typed. @@ -81,3 +187,38 @@ int CommandReceived(char *Cmd) { return CmdsParse(CommandTable, Cmd); } + +//----------------------------------------------------------------------------- +// Entry point into our code: called whenever we received a packet over USB +// that we weren't necessarily expecting, for example a debug print. +//----------------------------------------------------------------------------- +void UsbCommandReceived(UsbCommand *UC) +{ + switch(UC->cmd) { + // First check if we are handling a debug message + case CMD_DEBUG_PRINT_STRING: { + char s[USB_CMD_DATA_SIZE+1]; + memset(s, 0x00, sizeof(s)); + size_t len = MIN(UC->arg[0],USB_CMD_DATA_SIZE); + memcpy(s,UC->d.asBytes,len); + PrintAndLog("#db# %s", s); + return; + } break; + + case CMD_DEBUG_PRINT_INTEGERS: { + PrintAndLog("#db# %08x, %08x, %08x \r\n", UC->arg[0], UC->arg[1], UC->arg[2]); + return; + } break; + + case CMD_DOWNLOADED_RAW_ADC_SAMPLES_125K: { + memcpy(sample_buf+(UC->arg[0]),UC->d.asBytes,UC->arg[1]); + return; + } break; + + default: + storeCommand(UC); + break; + } + +} +