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