git.zerfleddert.de Git - proxmark3-svn/blob - client/cmdmain.c

   1 //-----------------------------------------------------------------------------
   2 // Copyright (C) 2010 iZsh <izsh at fail0verflow.com>
   3 //
   4 // This code is licensed to you under the terms of the GNU GPL, version 2 or,
   5 // at your option, any later version. See the LICENSE.txt file for the text of
   6 // the license.
   7 //-----------------------------------------------------------------------------
   8 // Main command parser entry point
   9 //-----------------------------------------------------------------------------
  10
  11 #include "cmdmain.h"
  12
  13 #include <pthread.h>
  14 #include <stdio.h>
  15 #include <stdlib.h>
  16 #include <unistd.h>
  17 #include <string.h>
  18 #include "cmdparser.h"
  19 #include "proxmark3.h"
  20 #include "data.h"
  21 #include "usb_cmd.h"
  22 #include "ui.h"
  23 #include "cmdhf.h"
  24 #include "cmddata.h"
  25 #include "cmdhw.h"
  26 #include "cmdlf.h"
  27 #include "util.h"
  28 #include "util_posix.h"
  29 #include "cmdscript.h"
  30 #include "cmdcrc.h"
  31
  32
  33 unsigned int current_command = CMD_UNKNOWN;
  34
  35 static int CmdHelp(const char *Cmd);
  36 static int CmdQuit(const char *Cmd);
  37 static int CmdRev(const char *Cmd);
  38
  39 //For storing command that are received from the device
  40 #define CMD_BUFFER_SIZE 50
  41 static UsbCommand cmdBuffer[CMD_BUFFER_SIZE];
  42 //Points to the next empty position to write to
  43 static int cmd_head;//Starts as 0
  44 //Points to the position of the last unread command
  45 static int cmd_tail;//Starts as 0
  46 // to lock cmdBuffer operations from different threads
  47 static pthread_mutex_t cmdBufferMutex = PTHREAD_MUTEX_INITIALIZER;
  48
  49 static command_t CommandTable[] =
  50 {
  51   {"help",  CmdHelp,  1, "This help. Use '<command> help' for details of a particular command."},
  52   {"data",  CmdData,  1, "{ Plot window / data buffer manipulation... }"},
  53   {"hf",    CmdHF,    1, "{ High Frequency commands... }"},
  54   {"hw",    CmdHW,    1, "{ Hardware commands... }"},
  55   {"lf",    CmdLF,    1, "{ Low Frequency commands... }"},
  56   {"reveng",CmdRev,   1, "Crc calculations from the software reveng1-30"},
  57   {"script",CmdScript,1, "{ Scripting commands }"},
  58   {"quit",  CmdQuit,  1, "Exit program"},
  59   {"exit",  CmdQuit,  1, "Exit program"},
  60   {NULL, NULL, 0, NULL}
  61 };
  62
  63 command_t* getTopLevelCommandTable()
  64 {
  65   return CommandTable;
  66 }
  67 int CmdHelp(const char *Cmd)
  68 {
  69   CmdsHelp(CommandTable);
  70   return 0;
  71 }
  72
  73 int CmdQuit(const char *Cmd)
  74 {
  75   return 99;
  76 }
  77
  78 int CmdRev(const char *Cmd)
  79 {
  80   CmdCrc(Cmd);
  81   return 0;
  82 }
  83
  84 /**
  85  * @brief This method should be called when sending a new command to the pm3. In case any old
  86  *  responses from previous commands are stored in the buffer, a call to this method should clear them.
  87  *  A better method could have been to have explicit command-ACKS, so we can know which ACK goes to which
  88  *  operation. Right now we'll just have to live with this.
  89  */
  90 void clearCommandBuffer()
  91 {
  92     //This is a very simple operation
  93         pthread_mutex_lock(&cmdBufferMutex);
  94     cmd_tail = cmd_head;
  95         pthread_mutex_unlock(&cmdBufferMutex);
  96 }
  97
  98 /**
  99  * @brief storeCommand stores a USB command in a circular buffer
 100  * @param UC
 101  */
 102 void storeCommand(UsbCommand *command)
 103 {
 104         pthread_mutex_lock(&cmdBufferMutex);
 105     if( ( cmd_head+1) % CMD_BUFFER_SIZE == cmd_tail)
 106     {
 107         //If these two are equal, we're about to overwrite in the
 108         // circular buffer.
 109         PrintAndLog("WARNING: Command buffer about to overwrite command! This needs to be fixed!");
 110     }
 111     //Store the command at the 'head' location
 112     UsbCommand* destination = &cmdBuffer[cmd_head];
 113     memcpy(destination, command, sizeof(UsbCommand));
 114
 115     cmd_head = (cmd_head +1) % CMD_BUFFER_SIZE; //increment head and wrap
 116         pthread_mutex_unlock(&cmdBufferMutex);
 117 }
 118
 119
 120 /**
 121  * @brief getCommand gets a command from an internal circular buffer.
 122  * @param response location to write command
 123  * @return 1 if response was returned, 0 if nothing has been received
 124  */
 125 int getCommand(UsbCommand* response)
 126 {
 127         pthread_mutex_lock(&cmdBufferMutex);
 128     //If head == tail, there's nothing to read, or if we just got initialized
 129     if(cmd_head == cmd_tail){
 130                 pthread_mutex_unlock(&cmdBufferMutex);
 131         return 0;
 132     }
 133     //Pick out the next unread command
 134     UsbCommand* last_unread = &cmdBuffer[cmd_tail];
 135     memcpy(response, last_unread, sizeof(UsbCommand));
 136     //Increment tail - this is a circular buffer, so modulo buffer size
 137     cmd_tail = (cmd_tail +1 ) % CMD_BUFFER_SIZE;
 138         pthread_mutex_unlock(&cmdBufferMutex);
 139     return 1;
 140 }
 141
 142
 143 /**
 144  * Waits for a certain response type. This method waits for a maximum of
 145  * ms_timeout milliseconds for a specified response command.
 146  *@brief WaitForResponseTimeout
 147  * @param cmd command to wait for
 148  * @param response struct to copy received command into.
 149  * @param ms_timeout
 150  * @return true if command was returned, otherwise false
 151  */
 152 bool WaitForResponseTimeoutW(uint32_t cmd, UsbCommand* response, size_t ms_timeout, bool show_warning) {
 153
 154         UsbCommand resp;
 155
 156         if (response == NULL) {
 157                 response = &resp;
 158         }
 159
 160         uint64_t start_time = msclock();
 161
 162         // Wait until the command is received
 163         while (true) {
 164                 while(getCommand(response)) {
 165                         if(response->cmd == cmd){
 166                                 return true;
 167                         }
 168                 }
 169                 if (msclock() - start_time > ms_timeout) {
 170                         break;
 171                 }
 172                 if (msclock() - start_time > 2000 && show_warning) {
 173                         PrintAndLog("Waiting for a response from the proxmark...");
 174                         PrintAndLog("Don't forget to cancel its operation first by pressing on the button");
 175                         show_warning = false;
 176                 }
 177         }
 178         return false;
 179 }
 180
 181
 182 bool WaitForResponseTimeout(uint32_t cmd, UsbCommand* response, size_t ms_timeout) {
 183         return WaitForResponseTimeoutW(cmd, response, ms_timeout, true);
 184 }
 185
 186 bool WaitForResponse(uint32_t cmd, UsbCommand* response) {
 187         return WaitForResponseTimeoutW(cmd, response, -1, true);
 188 }
 189
 190
 191 //-----------------------------------------------------------------------------
 192 // Entry point into our code: called whenever the user types a command and
 193 // then presses Enter, which the full command line that they typed.
 194 //-----------------------------------------------------------------------------
 195 int CommandReceived(char *Cmd) {
 196         return CmdsParse(CommandTable, Cmd);
 197 }
 198
 199
 200 //-----------------------------------------------------------------------------
 201 // Entry point into our code: called whenever we received a packet over USB
 202 // that we weren't necessarily expecting, for example a debug print.
 203 //-----------------------------------------------------------------------------
 204 void UsbCommandReceived(UsbCommand *UC)
 205 {
 206         switch(UC->cmd) {
 207                 // First check if we are handling a debug message
 208                 case CMD_DEBUG_PRINT_STRING: {
 209                         char s[USB_CMD_DATA_SIZE+1];
 210                         memset(s, 0x00, sizeof(s));
 211                         size_t len = MIN(UC->arg[0],USB_CMD_DATA_SIZE);
 212                         memcpy(s,UC->d.asBytes,len);
 213                         PrintAndLog("#db# %s", s);
 214                         return;
 215                 } break;
 216
 217                 case CMD_DEBUG_PRINT_INTEGERS: {
 218                         PrintAndLog("#db# %08x, %08x, %08x       \r\n", UC->arg[0], UC->arg[1], UC->arg[2]);
 219                         return;
 220                 } break;
 221
 222                 case CMD_DOWNLOADED_RAW_ADC_SAMPLES_125K: {
 223                         memcpy(sample_buf+(UC->arg[0]),UC->d.asBytes,UC->arg[1]);
 224                         return;
 225                 } break;
 226
 227                 default:
 228                         storeCommand(UC);
 229                         break;
 230         }
 231
 232 }
 233