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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 "cmdmain.h"
12
13 #include <pthread.h>
14 #include <stdio.h>
15 #include <stdlib.h>
16 #include <unistd.h>
17 #include <string.h>
18 #include "cmdparser.h"
19 #include "proxmark3.h"
20 #include "data.h"
21 #include "usb_cmd.h"
22 #include "ui.h"
23 #include "cmdhf.h"
24 #include "cmddata.h"
25 #include "cmdhw.h"
26 #include "cmdlf.h"
27 #include "util.h"
28 #include "util_posix.h"
29 #include "cmdscript.h"
30
31
32 unsigned int current_command = CMD_UNKNOWN;
33
34 static int CmdHelp(const char *Cmd);
35 static int CmdQuit(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 // to lock cmdBuffer operations from different threads
45 static pthread_mutex_t cmdBufferMutex = PTHREAD_MUTEX_INITIALIZER;
46
47 static command_t CommandTable[] =
48 {
49 {"help", CmdHelp, 1, "This help. Use '<command> help' for details of a particular command."},
50 {"data", CmdData, 1, "{ Plot window / data buffer manipulation... }"},
51 {"hf", CmdHF, 1, "{ High Frequency commands... }"},
52 {"hw", CmdHW, 1, "{ Hardware commands... }"},
53 {"lf", CmdLF, 1, "{ Low Frequency commands... }"},
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
70 int CmdQuit(const char *Cmd)
71 {
72 return 99;
73 }
74
75 /**
76 * @brief This method should be called when sending a new command to the pm3. In case any old
77 * responses from previous commands are stored in the buffer, a call to this method should clear them.
78 * A better method could have been to have explicit command-ACKS, so we can know which ACK goes to which
79 * operation. Right now we'll just have to live with this.
80 */
81 void clearCommandBuffer()
82 {
83 //This is a very simple operation
84 pthread_mutex_lock(&cmdBufferMutex);
85 cmd_tail = cmd_head;
86 pthread_mutex_unlock(&cmdBufferMutex);
87 }
88
89 /**
90 * @brief storeCommand stores a USB command in a circular buffer
91 * @param UC
92 */
93 void storeCommand(UsbCommand *command)
94 {
95 pthread_mutex_lock(&cmdBufferMutex);
96 if( ( cmd_head+1) % CMD_BUFFER_SIZE == cmd_tail)
97 {
98 //If these two are equal, we're about to overwrite in the
99 // circular buffer.
100 PrintAndLog("WARNING: Command buffer about to overwrite command! This needs to be fixed!");
101 }
102 //Store the command at the 'head' location
103 UsbCommand* destination = &cmdBuffer[cmd_head];
104 memcpy(destination, command, sizeof(UsbCommand));
105
106 cmd_head = (cmd_head +1) % CMD_BUFFER_SIZE; //increment head and wrap
107 pthread_mutex_unlock(&cmdBufferMutex);
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 pthread_mutex_lock(&cmdBufferMutex);
119 //If head == tail, there's nothing to read, or if we just got initialized
120 if(cmd_head == cmd_tail){
121 pthread_mutex_unlock(&cmdBufferMutex);
122 return 0;
123 }
124 //Pick out the next unread command
125 UsbCommand* last_unread = &cmdBuffer[cmd_tail];
126 memcpy(response, last_unread, sizeof(UsbCommand));
127 //Increment tail - this is a circular buffer, so modulo buffer size
128 cmd_tail = (cmd_tail +1 ) % CMD_BUFFER_SIZE;
129 pthread_mutex_unlock(&cmdBufferMutex);
130 return 1;
131 }
132
133
134 /**
135 * Waits for a certain response type. This method waits for a maximum of
136 * ms_timeout milliseconds for a specified response command.
137 *@brief WaitForResponseTimeout
138 * @param cmd command to wait for
139 * @param response struct to copy received command into.
140 * @param ms_timeout
141 * @return true if command was returned, otherwise false
142 */
143 bool WaitForResponseTimeoutW(uint32_t cmd, UsbCommand* response, size_t ms_timeout, bool show_warning) {
144
145 UsbCommand resp;
146
147 if (response == NULL) {
148 response = &resp;
149 }
150
151 uint64_t start_time = msclock();
152
153 // Wait until the command is received
154 while (true) {
155 while(getCommand(response)) {
156 if(response->cmd == cmd){
157 return true;
158 }
159 }
160 if (msclock() - start_time > ms_timeout) {
161 break;
162 }
163 if (msclock() - start_time > 2000 && show_warning) {
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 show_warning = false;
167 }
168 }
169 return false;
170 }
171
172
173 bool WaitForResponseTimeout(uint32_t cmd, UsbCommand* response, size_t ms_timeout) {
174 return WaitForResponseTimeoutW(cmd, response, ms_timeout, true);
175 }
176
177 bool WaitForResponse(uint32_t cmd, UsbCommand* response) {
178 return WaitForResponseTimeoutW(cmd, response, -1, true);
179 }
180
181
182 //-----------------------------------------------------------------------------
183 // Entry point into our code: called whenever the user types a command and
184 // then presses Enter, which the full command line that they typed.
185 //-----------------------------------------------------------------------------
186 int CommandReceived(char *Cmd) {
187 return CmdsParse(CommandTable, Cmd);
188 }
189
190
191 //-----------------------------------------------------------------------------
192 // Entry point into our code: called whenever we received a packet over USB
193 // that we weren't necessarily expecting, for example a debug print.
194 //-----------------------------------------------------------------------------
195 void UsbCommandReceived(UsbCommand *UC)
196 {
197 switch(UC->cmd) {
198 // First check if we are handling a debug message
199 case CMD_DEBUG_PRINT_STRING: {
200 char s[USB_CMD_DATA_SIZE+1];
201 memset(s, 0x00, sizeof(s));
202 size_t len = MIN(UC->arg[0],USB_CMD_DATA_SIZE);
203 memcpy(s,UC->d.asBytes,len);
204 PrintAndLog("#db# %s", s);
205 return;
206 } break;
207
208 case CMD_DEBUG_PRINT_INTEGERS: {
209 PrintAndLog("#db# %08x, %08x, %08x \r\n", UC->arg[0], UC->arg[1], UC->arg[2]);
210 return;
211 } break;
212
213 case CMD_DOWNLOADED_RAW_ADC_SAMPLES_125K: {
214 memcpy(sample_buf+(UC->arg[0]),UC->d.asBytes,UC->arg[1]);
215 return;
216 } break;
217
218 default:
219 storeCommand(UC);
220 break;
221 }
222
223 }
224
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