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 "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 "util_posix.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 static int CmdRev(const char *Cmd);
  36
  37 //For storing command that are received from the device
  38 #define CMD_BUFFER_SIZE 50
  39 static UsbCommand cmdBuffer[CMD_BUFFER_SIZE];
  40 //Points to the next empty position to write to
  41 static int cmd_head;//Starts as 0
  42 //Points to the position of the last unread command
  43 static int cmd_tail;//Starts as 0
  44
  45 static command_t CommandTable[] =
  46 {
  47   {"help",  CmdHelp,  1, "This help. Use '<command> help' for details of a particular command."},
  48   {"data",  CmdData,  1, "{ Plot window / data buffer manipulation... }"},
  49   {"hf",    CmdHF,    1, "{ High Frequency commands... }"},
  50   {"hw",    CmdHW,    1, "{ Hardware commands... }"},
  51   {"lf",    CmdLF,    1, "{ Low Frequency commands... }"},
  52   {"reveng",CmdRev,   1, "Crc calculations from the software reveng1-30"},
  53   {"script",CmdScript,1, "{ Scripting commands }"},
  54   {"quit",  CmdQuit,  1, "Exit program"},
  55   {"exit",  CmdQuit,  1, "Exit program"},
  56   {NULL, NULL, 0, NULL}
  57 };
  58
  59 command_t* getTopLevelCommandTable()
  60 {
  61   return CommandTable;
  62 }
  63 int CmdHelp(const char *Cmd)
  64 {
  65   CmdsHelp(CommandTable);
  66   return 0;
  67 }
  68
  69 int CmdQuit(const char *Cmd)
  70 {
  71   return 99;
  72 }
  73
  74 int CmdRev(const char *Cmd)
  75 {
  76   CmdCrc(Cmd);
  77   return 0;
  78 }
  79
  80 /**
  81  * @brief This method should be called when sending a new command to the pm3. In case any old
  82  *  responses from previous commands are stored in the buffer, a call to this method should clear them.
  83  *  A better method could have been to have explicit command-ACKS, so we can know which ACK goes to which
  84  *  operation. Right now we'll just have to live with this.
  85  */
  86 void clearCommandBuffer()
  87 {
  88     //This is a very simple operation
  89     cmd_tail = cmd_head;
  90 }
  91
  92 /**
  93  * @brief storeCommand stores a USB command in a circular buffer
  94  * @param UC
  95  */
  96 void storeCommand(UsbCommand *command)
  97 {
  98     if( ( cmd_head+1) % CMD_BUFFER_SIZE == cmd_tail)
  99     {
 100         //If these two are equal, we're about to overwrite in the
 101         // circular buffer.
 102         PrintAndLog("WARNING: Command buffer about to overwrite command! This needs to be fixed!");
 103     }
 104     //Store the command at the 'head' location
 105     UsbCommand* destination = &cmdBuffer[cmd_head];
 106     memcpy(destination, command, sizeof(UsbCommand));
 107
 108     cmd_head = (cmd_head +1) % CMD_BUFFER_SIZE; //increment head and wrap
 109 }
 110
 111
 112 /**
 113  * @brief getCommand gets a command from an internal circular buffer.
 114  * @param response location to write command
 115  * @return 1 if response was returned, 0 if nothing has been received
 116  */
 117 int getCommand(UsbCommand* response)
 118 {
 119     //If head == tail, there's nothing to read, or if we just got initialized
 120     if(cmd_head == cmd_tail){
 121         return 0;
 122     }
 123     //Pick out the next unread command
 124     UsbCommand* last_unread = &cmdBuffer[cmd_tail];
 125     memcpy(response, last_unread, sizeof(UsbCommand));
 126     //Increment tail - this is a circular buffer, so modulo buffer size
 127     cmd_tail = (cmd_tail +1 ) % CMD_BUFFER_SIZE;
 128
 129     return 1;
 130 }
 131
 132
 133 /**
 134  * Waits for a certain response type. This method waits for a maximum of
 135  * ms_timeout milliseconds for a specified response command.
 136  *@brief WaitForResponseTimeout
 137  * @param cmd command to wait for
 138  * @param response struct to copy received command into.
 139  * @param ms_timeout
 140  * @return true if command was returned, otherwise false
 141  */
 142 bool WaitForResponseTimeout(uint32_t cmd, UsbCommand* response, size_t ms_timeout) {
 143
 144         UsbCommand resp;
 145
 146         if (response == NULL) {
 147                 response = &resp;
 148         }
 149
 150         // Wait until the command is received
 151         for(size_t dm_seconds=0; dm_seconds < ms_timeout/10; dm_seconds++) {
 152                 while(getCommand(response)) {
 153                         if(response->cmd == cmd){
 154                                 return true;
 155                         }
 156                 }
 157                 msleep(10); // XXX ugh
 158                 if (dm_seconds == 200) { // Two seconds elapsed
 159                         PrintAndLog("Waiting for a response from the proxmark...");
 160                         PrintAndLog("Don't forget to cancel its operation first by pressing on the button");
 161                 }
 162         }
 163         return false;
 164 }
 165
 166
 167 bool WaitForResponse(uint32_t cmd, UsbCommand* response) {
 168         return WaitForResponseTimeout(cmd,response,-1);
 169 }
 170
 171
 172 //-----------------------------------------------------------------------------
 173 // Entry point into our code: called whenever the user types a command and
 174 // then presses Enter, which the full command line that they typed.
 175 //-----------------------------------------------------------------------------
 176 int CommandReceived(char *Cmd) {
 177         return CmdsParse(CommandTable, Cmd);
 178 }
 179
 180
 181 //-----------------------------------------------------------------------------
 182 // Entry point into our code: called whenever we received a packet over USB
 183 // that we weren't necessarily expecting, for example a debug print.
 184 //-----------------------------------------------------------------------------
 185 void UsbCommandReceived(UsbCommand *UC)
 186 {
 187         switch(UC->cmd) {
 188                 // First check if we are handling a debug message
 189                 case CMD_DEBUG_PRINT_STRING: {
 190                         char s[USB_CMD_DATA_SIZE+1];
 191                         memset(s, 0x00, sizeof(s));
 192                         size_t len = MIN(UC->arg[0],USB_CMD_DATA_SIZE);
 193                         memcpy(s,UC->d.asBytes,len);
 194                         PrintAndLog("#db# %s", s);
 195                         return;
 196                 } break;
 197
 198                 case CMD_DEBUG_PRINT_INTEGERS: {
 199                         PrintAndLog("#db# %08x, %08x, %08x       \r\n", UC->arg[0], UC->arg[1], UC->arg[2]);
 200                         return;
 201                 } break;
 202
 203                 case CMD_DOWNLOADED_RAW_ADC_SAMPLES_125K: {
 204                         memcpy(sample_buf+(UC->arg[0]),UC->d.asBytes,UC->arg[1]);
 205                         return;
 206                 } break;
 207
 208                 default:
 209                         storeCommand(UC);
 210                         break;
 211         }
 212
 213 }
 214