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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 static int CmdLS(const char *Cmd);
37
38 //For storing command that are received from the device
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 {"ls", CmdLS, 1, "list commands"},
49 {"data", CmdData, 1, "{ Plot window / data buffer manipulation... }"},
50 {"hf", CmdHF, 1, "{ High Frequency commands... }"},
51 {"hw", CmdHW, 1, "{ Hardware commands... }"},
52 {"lf", CmdLF, 1, "{ Low Frequency commands... }"},
53 {"reveng", CmdRev, 1, "Crc calculations from the software reveng 1.30"},
54 {"script", CmdScript, 1, "{ Scripting commands }"},
55 {"quit", CmdQuit, 1, "Exit program"},
56 {"exit", CmdQuit, 1, "Exit program"},
57 {NULL, NULL, 0, NULL}
58 };
59
60 command_t* getTopLevelCommandTable()
61 {
62 return CommandTable;
63 }
64 int CmdHelp(const char *Cmd)
65 {
66 CmdsHelp(CommandTable);
67 return 0;
68 }
69 int CmdLS(const char *Cmd){
70 CmdsLS(CommandTable);
71 return 0;
72 }
73
74 int CmdQuit(const char *Cmd)
75 {
76 exit(0);
77 return 0;
78 }
79
80 int CmdRev(const char *Cmd)
81 {
82 CmdCrc(Cmd);
83 return 0;
84 }
85 /**
86 * @brief This method should be called when sending a new command to the pm3. In case any old
87 * responses from previous commands are stored in the buffer, a call to this method should clear them.
88 * A better method could have been to have explicit command-ACKS, so we can know which ACK goes to which
89 * operation. Right now we'll just have to live with this.
90 */
91 void clearCommandBuffer()
92 {
93 //This is a very simple operation
94 cmd_tail = cmd_head;
95 }
96
97 /**
98 * @brief storeCommand stores a USB command in a circular buffer
99 * @param UC
100 */
101 void storeCommand(UsbCommand *command)
102 {
103 if( ( cmd_head+1) % CMD_BUFFER_SIZE == cmd_tail)
104 {
105 //If these two are equal, we're about to overwrite in the
106 // circular buffer.
107 PrintAndLog("WARNING: Command buffer about to overwrite command! This needs to be fixed!");
108 }
109 //Store the command at the 'head' location
110 UsbCommand* destination = &cmdBuffer[cmd_head];
111 memcpy(destination, command, sizeof(UsbCommand));
112
113 cmd_head = (cmd_head +1) % CMD_BUFFER_SIZE; //increment head and wrap
114
115 }
116 /**
117 * @brief getCommand gets a command from an internal circular buffer.
118 * @param response location to write command
119 * @return 1 if response was returned, 0 if nothing has been received
120 */
121 int getCommand(UsbCommand* response)
122 {
123 //If head == tail, there's nothing to read, or if we just got initialized
124 if(cmd_head == cmd_tail){
125 return 0;
126 }
127 //Pick out the next unread command
128 UsbCommand* last_unread = &cmdBuffer[cmd_tail];
129 memcpy(response, last_unread, sizeof(UsbCommand));
130 //Increment tail - this is a circular buffer, so modulo buffer size
131 cmd_tail = (cmd_tail +1 ) % CMD_BUFFER_SIZE;
132
133 return 1;
134
135 }
136
137 /**
138 * Waits for a certain response type. This method waits for a maximum of
139 * ms_timeout milliseconds for a specified response command.
140 *@brief WaitForResponseTimeout
141 * @param cmd command to wait for
142 * @param response struct to copy received command into.
143 * @param ms_timeout
144 * @return true if command was returned, otherwise false
145 */
146 bool WaitForResponseTimeout(uint32_t cmd, UsbCommand* response, size_t ms_timeout) {
147
148 UsbCommand resp;
149
150 if (response == NULL)
151 response = &resp;
152
153
154 // Wait until the command is received
155 for(size_t dm_seconds=0; dm_seconds < ms_timeout/10; dm_seconds++) {
156
157 while(getCommand(response)) {
158 if(response->cmd == cmd){
159 return true;
160 }
161 }
162 msleep(10); // XXX ugh
163 if (dm_seconds == 200) { // Two seconds elapsed
164 PrintAndLog("Waiting for a response from the proxmark...");
165 PrintAndLog("Don't forget to cancel its operation first by pressing on the button");
166 }
167 }
168 return false;
169 }
170
171 bool WaitForResponse(uint32_t cmd, UsbCommand* response) {
172 return WaitForResponseTimeout(cmd,response,-1);
173 }
174
175 //-----------------------------------------------------------------------------
176 // Entry point into our code: called whenever the user types a command and
177 // then presses Enter, which the full command line that they typed.
178 //-----------------------------------------------------------------------------
179 void CommandReceived(char *Cmd) {
180 CmdsParse(CommandTable, Cmd);
181 }
182
183 //-----------------------------------------------------------------------------
184 // Entry point into our code: called whenever we received a packet over USB
185 // that we weren't necessarily expecting, for example a debug print.
186 //-----------------------------------------------------------------------------
187 void UsbCommandReceived(UsbCommand *UC)
188 {
189 switch(UC->cmd) {
190 // First check if we are handling a debug message
191 case CMD_DEBUG_PRINT_STRING: {
192 char s[USB_CMD_DATA_SIZE+1] = {0x00};
193 size_t len = MIN(UC->arg[0],USB_CMD_DATA_SIZE);
194 memcpy(s,UC->d.asBytes,len);
195 PrintAndLog("#db# %s ", s);
196 return;
197 } break;
198
199 case CMD_DEBUG_PRINT_INTEGERS: {
200 PrintAndLog("#db# %08x, %08x, %08x \r\n", UC->arg[0], UC->arg[1], UC->arg[2]);
201 return;
202 } break;
203
204 case CMD_DOWNLOADED_RAW_ADC_SAMPLES_125K: {
205 memcpy(sample_buf+(UC->arg[0]),UC->d.asBytes,UC->arg[1]);
206 } break;
207
208 default:
209 break;
210 }
211
212 storeCommand(UC);
213 }
214
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