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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 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 exit(0);
72 return 0;
73 }
74
75 int CmdRev(const char *Cmd)
76 {
77 CmdCrc(Cmd);
78 return 0;
79 }
80
81 /**
82 * @brief This method should be called when sending a new command to the pm3. In case any old
83 * responses from previous commands are stored in the buffer, a call to this method should clear them.
84 * A better method could have been to have explicit command-ACKS, so we can know which ACK goes to which
85 * operation. Right now we'll just have to live with this.
86 */
87 void clearCommandBuffer()
88 {
89 //This is a very simple operation
90 cmd_tail = cmd_head;
91 }
92
93 /**
94 * @brief storeCommand stores a USB command in a circular buffer
95 * @param UC
96 */
97 void storeCommand(UsbCommand *command)
98 {
99 if( ( cmd_head+1) % CMD_BUFFER_SIZE == cmd_tail)
100 {
101 //If these two are equal, we're about to overwrite in the
102 // circular buffer.
103 PrintAndLog("WARNING: Command buffer about to overwrite command! This needs to be fixed!");
104 }
105 //Store the command at the 'head' location
106 UsbCommand* destination = &cmdBuffer[cmd_head];
107 memcpy(destination, command, sizeof(UsbCommand));
108
109 cmd_head = (cmd_head +1) % CMD_BUFFER_SIZE; //increment head and wrap
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
153 while(getCommand(response)) {
154 if(response->cmd == cmd){
155 return true;
156 }
157 }
158 msleep(10); // XXX ugh
159 if (dm_seconds == 200) { // Two seconds elapsed
160 PrintAndLog("Waiting for a response from the proxmark...");
161 PrintAndLog("Don't forget to cancel its operation first by pressing on the button");
162 }
163 }
164 return false;
165 }
166
167 bool WaitForResponse(uint32_t cmd, UsbCommand* response) {
168 return WaitForResponseTimeout(cmd,response,-1);
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 void CommandReceived(char *Cmd) {
176 CmdsParse(CommandTable, Cmd);
177 }
178
179 //-----------------------------------------------------------------------------
180 // Entry point into our code: called whenever we received a packet over USB
181 // that we weren't necessarily expecting, for example a debug print.
182 //-----------------------------------------------------------------------------
183 void UsbCommandReceived(UsbCommand *UC)
184 {
185 switch(UC->cmd) {
186 // First check if we are handling a debug message
187 case CMD_DEBUG_PRINT_STRING: {
188 char s[USB_CMD_DATA_SIZE+1] = {0x00};
189 size_t len = MIN(UC->arg[0],USB_CMD_DATA_SIZE);
190 memcpy(s,UC->d.asBytes,len);
191 PrintAndLog("#db# %s ", s);
192 return;
193 } break;
194
195 case CMD_DEBUG_PRINT_INTEGERS: {
196 PrintAndLog("#db# %08x, %08x, %08x \r\n", UC->arg[0], UC->arg[1], UC->arg[2]);
197 return;
198 } break;
199
200 case CMD_DOWNLOADED_RAW_ADC_SAMPLES_125K: {
201 memcpy(sample_buf+(UC->arg[0]),UC->d.asBytes,UC->arg[1]);
202 } break;
203
204 default:
205 break;
206 }
207
208 storeCommand(UC);
209 }
210
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