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