// Code for communicating with the proxmark3 hardware.
//-----------------------------------------------------------------------------
-#include <pthread.h>
-
#include "comms.h"
+
+#include <pthread.h>
+#if defined(__linux__) && !defined(NO_UNLINK)
+#include <unistd.h> // for unlink()
+#endif
#include "uart.h"
#include "ui.h"
#include "common.h"
-#include "data.h"
+#include "util_darwin.h"
#include "util_posix.h"
-// Declare globals.
// Serial port that we are communicating with the PM3 on.
-static serial_port* port;
+static serial_port sp = NULL;
+static char *serial_port_name = NULL;
// If TRUE, then there is no active connection to the PM3, and we will drop commands sent.
static bool offline;
+typedef struct {
+ bool run; // If TRUE, continue running the uart_communication thread
+ bool block_after_ACK; // if true, block after receiving an ACK package
+} communication_arg_t;
+
+static communication_arg_t conn;
+static pthread_t USB_communication_thread;
+
// Transmit buffer.
-// TODO: Use locks and execute this on the main thread, rather than the receiver
-// thread. Running on the main thread means we need to be careful in the
-// flasher, as it means SendCommand is no longer async, and can't be used as a
-// buffer for a pending command when the connection is re-established.
-static UsbCommand txcmd;
-static bool txcmd_pending;
+static UsbCommand txBuffer;
+static bool txBuffer_pending = false;
+static pthread_mutex_t txBufferMutex = PTHREAD_MUTEX_INITIALIZER;
+static pthread_cond_t txBufferSig = PTHREAD_COND_INITIALIZER;
// Used by UsbReceiveCommand as a ring buffer for messages that are yet to be
// processed by a command handler (WaitForResponse{,Timeout})
-static UsbCommand cmdBuffer[CMD_BUFFER_SIZE];
+static UsbCommand rxBuffer[CMD_BUFFER_SIZE];
// Points to the next empty position to write to
static int cmd_head = 0;
// Points to the position of the last unread command
static int cmd_tail = 0;
-// to lock cmdBuffer operations from different threads
-static pthread_mutex_t cmdBufferMutex = PTHREAD_MUTEX_INITIALIZER;
+// to lock rxBuffer operations from different threads
+static pthread_mutex_t rxBufferMutex = PTHREAD_MUTEX_INITIALIZER;
// These wrappers are required because it is not possible to access a static
// global variable outside of the context of a single file.
-void SetSerialPort(serial_port* new_port) {
- port = new_port;
-}
-
-serial_port* GetSerialPort() {
- return port;
-}
-
void SetOffline(bool new_offline) {
offline = new_offline;
}
#endif
if (offline) {
- PrintAndLog("Sending bytes to proxmark failed - offline");
- return;
+ PrintAndLog("Sending bytes to proxmark failed - offline");
+ return;
}
- /**
- The while-loop below causes hangups at times, when the pm3 unit is unresponsive
- or disconnected. The main console thread is alive, but comm thread just spins here.
- Not good.../holiman
+
+ pthread_mutex_lock(&txBufferMutex);
+ /**
+ This causes hangups at times, when the pm3 unit is unresponsive or disconnected. The main console thread is alive,
+ but comm thread just spins here. Not good.../holiman
**/
- while(txcmd_pending);
- txcmd = *c;
- txcmd_pending = true;
+ while (txBuffer_pending) {
+ pthread_cond_wait(&txBufferSig, &txBufferMutex); // wait for communication thread to complete sending a previous commmand
+ }
+
+ txBuffer = *c;
+ txBuffer_pending = true;
+ pthread_cond_signal(&txBufferSig); // tell communication thread that a new command can be send
+
+ pthread_mutex_unlock(&txBufferMutex);
+
}
+
/**
* @brief This method should be called when sending a new command to the pm3. In case any old
* responses from previous commands are stored in the buffer, a call to this method should clear them.
void clearCommandBuffer()
{
//This is a very simple operation
- pthread_mutex_lock(&cmdBufferMutex);
+ pthread_mutex_lock(&rxBufferMutex);
cmd_tail = cmd_head;
- pthread_mutex_unlock(&cmdBufferMutex);
+ pthread_mutex_unlock(&rxBufferMutex);
}
/**
* @brief storeCommand stores a USB command in a circular buffer
* @param UC
*/
-void storeCommand(UsbCommand *command)
+static void storeCommand(UsbCommand *command)
{
- pthread_mutex_lock(&cmdBufferMutex);
+ pthread_mutex_lock(&rxBufferMutex);
if( (cmd_head+1) % CMD_BUFFER_SIZE == cmd_tail)
{
// If these two are equal, we're about to overwrite in the
}
// Store the command at the 'head' location
- UsbCommand* destination = &cmdBuffer[cmd_head];
+ UsbCommand* destination = &rxBuffer[cmd_head];
memcpy(destination, command, sizeof(UsbCommand));
cmd_head = (cmd_head +1) % CMD_BUFFER_SIZE; //increment head and wrap
- pthread_mutex_unlock(&cmdBufferMutex);
+ pthread_mutex_unlock(&rxBufferMutex);
}
* @param response location to write command
* @return 1 if response was returned, 0 if nothing has been received
*/
-int getCommand(UsbCommand* response)
+static int getCommand(UsbCommand* response)
{
- pthread_mutex_lock(&cmdBufferMutex);
+ pthread_mutex_lock(&rxBufferMutex);
//If head == tail, there's nothing to read, or if we just got initialized
if (cmd_head == cmd_tail){
- pthread_mutex_unlock(&cmdBufferMutex);
+ pthread_mutex_unlock(&rxBufferMutex);
return 0;
}
//Pick out the next unread command
- UsbCommand* last_unread = &cmdBuffer[cmd_tail];
+ UsbCommand* last_unread = &rxBuffer[cmd_tail];
memcpy(response, last_unread, sizeof(UsbCommand));
//Increment tail - this is a circular buffer, so modulo buffer size
cmd_tail = (cmd_tail + 1) % CMD_BUFFER_SIZE;
- pthread_mutex_unlock(&cmdBufferMutex);
+ pthread_mutex_unlock(&rxBufferMutex);
return 1;
}
-//-----------------------------------------------------------------------------
-// Entry point into our code: called whenever we received a packet over USB
-// that we weren't necessarily expecting, for example a debug print.
-//-----------------------------------------------------------------------------
-void UsbCommandReceived(UsbCommand *UC)
+
+//----------------------------------------------------------------------------------
+// Entry point into our code: called whenever we received a packet over USB.
+// Handle debug commands directly, store all other commands in circular buffer.
+//----------------------------------------------------------------------------------
+static void UsbCommandReceived(UsbCommand *UC)
{
switch(UC->cmd) {
-
- // First check if we are handling a debug message
- case CMD_DEBUG_PRINT_STRING: {
- char s[USB_CMD_DATA_SIZE+1];
- memset(s, 0x00, sizeof(s));
- size_t len = MIN(UC->arg[0],USB_CMD_DATA_SIZE);
- memcpy(s,UC->d.asBytes,len);
- PrintAndLog("#db# %s", s);
- return;
- }
-
- case CMD_DEBUG_PRINT_INTEGERS: {
- PrintAndLog("#db# %08x, %08x, %08x \r\n", UC->arg[0], UC->arg[1], UC->arg[2]);
- return;
- }
-
- case CMD_DOWNLOADED_RAW_ADC_SAMPLES_125K: {
- // FIXME: This does unsanitised copies into memory when we don't know
- // the size of the buffer.
- if (sample_buf) {
- memcpy(sample_buf+(UC->arg[0]),UC->d.asBytes,UC->arg[1]);
- }
- return;
+ // First check if we are handling a debug message
+ case CMD_DEBUG_PRINT_STRING: {
+ char s[USB_CMD_DATA_SIZE+1];
+ memset(s, 0x00, sizeof(s));
+ size_t len = MIN(UC->arg[0],USB_CMD_DATA_SIZE);
+ memcpy(s,UC->d.asBytes,len);
+ PrintAndLog("#db# %s", s);
+ return;
+ } break;
+
+ case CMD_DEBUG_PRINT_INTEGERS: {
+ PrintAndLog("#db# %08x, %08x, %08x \r\n", UC->arg[0], UC->arg[1], UC->arg[2]);
+ return;
+ } break;
+
+ default:
+ storeCommand(UC);
+ break;
}
- default: {
- storeCommand(UC);
- return;
- }
- }
}
-// Gets a single command from a proxmark3 device. This should never be used
-// with the full client.
-//
-// @param conn A receiver_arg structure.
-// @param command A buffer to store the received command.
-bool ReceiveCommand(receiver_arg* conn, UsbCommand* command) {
- // Local recieve buffer
+
+static void
+#ifdef __has_attribute
+#if __has_attribute(force_align_arg_pointer)
+__attribute__((force_align_arg_pointer))
+#endif
+#endif
+*uart_communication(void *targ) {
+ communication_arg_t *conn = (communication_arg_t*)targ;
size_t rxlen;
- byte_t rx[sizeof(UsbCommand)];
- byte_t* prx = rx;
+ UsbCommand rx;
+ UsbCommand *prx = ℞
+
+#if defined(__MACH__) && defined(__APPLE__)
+ disableAppNap("Proxmark3 polling UART");
+#endif
while (conn->run) {
rxlen = 0;
- if (uart_receive(port, prx, sizeof(UsbCommand) - (prx-rx), &rxlen) && rxlen) {
+ bool ACK_received = false;
+ if (uart_receive(sp, (uint8_t *)prx, sizeof(UsbCommand) - (prx-&rx), &rxlen) && rxlen) {
prx += rxlen;
- if (prx-rx < sizeof(UsbCommand)) {
- // Keep reading until we have a completed response.
+ if (prx-&rx < sizeof(UsbCommand)) {
continue;
}
-
- // We have a completed response.
- memcpy(command, rx, sizeof(UsbCommand));
- return true;
+ UsbCommandReceived(&rx);
+ if (rx.cmd == CMD_ACK) {
+ ACK_received = true;
+ }
}
+ prx = ℞
- if (prx == rx) {
- // We got no complete command while waiting, give up control
- return false;
+
+ pthread_mutex_lock(&txBufferMutex);
+
+ if (conn->block_after_ACK) {
+ // if we just received an ACK, wait here until a new command is to be transmitted
+ if (ACK_received) {
+ while (!txBuffer_pending) {
+ pthread_cond_wait(&txBufferSig, &txBufferMutex);
+ }
+ }
}
+
+ if(txBuffer_pending) {
+ if (!uart_send(sp, (uint8_t*) &txBuffer, sizeof(UsbCommand))) {
+ PrintAndLog("Sending bytes to proxmark failed");
+ }
+ txBuffer_pending = false;
+ pthread_cond_signal(&txBufferSig); // tell main thread that txBuffer is empty
+ }
+
+ pthread_mutex_unlock(&txBufferMutex);
}
- // did not get a complete command before being cancelled.
- return false;
+#if defined(__MACH__) && defined(__APPLE__)
+ enableAppNap();
+#endif
+
+ pthread_exit(NULL);
+ return NULL;
}
-// Worker thread for processing incoming events from the PM3
-void *uart_receiver(void *targ) {
- receiver_arg *conn = (receiver_arg*)targ;
- UsbCommand rx;
- while (conn->run) {
- #ifdef COMMS_DEBUG
- printf("uart_receiver: get lock\n");
- #endif
- // Lock up receives, in case they try to take it away from us.
- pthread_mutex_lock(&conn->recv_lock);
- #ifdef COMMS_DEBUG
- printf("uart_receiver: lock acquired\n");
- #endif
-
- if (port == NULL) {
- #ifdef COMMS_DEBUG
- printf("uart_receiver: port disappeared\n");
- #endif
- // Our port disappeared, stall. This code path matters for the flasher,
- // where it is fiddling with the serial port under us.
- pthread_mutex_unlock(&conn->recv_lock);
- msleep(10);
- continue;
- }
+/**
+ * Data transfer from Proxmark to client. This method times out after
+ * ms_timeout milliseconds.
+ * @brief GetFromBigBuf
+ * @param dest Destination address for transfer
+ * @param bytes number of bytes to be transferred
+ * @param start_index offset into Proxmark3 BigBuf[]
+ * @param response struct to copy last command (CMD_ACK) into
+ * @param ms_timeout timeout in milliseconds
+ * @param show_warning display message after 2 seconds
+ * @return true if command was returned, otherwise false
+ */
+bool GetFromBigBuf(uint8_t *dest, int bytes, int start_index, UsbCommand *response, size_t ms_timeout, bool show_warning)
+{
+ UsbCommand c = {CMD_DOWNLOAD_RAW_ADC_SAMPLES_125K, {start_index, bytes, 0}};
+ SendCommand(&c);
- bool got_command = ReceiveCommand(conn, &rx);
- #ifdef COMMS_DEBUG
- printf("uart_receiver: got command\n");
- #endif
- pthread_mutex_unlock(&conn->recv_lock);
+ uint64_t start_time = msclock();
- if (got_command) {
- UsbCommandReceived(&rx);
- }
+ UsbCommand resp;
+ if (response == NULL) {
+ response = &resp;
+ }
- // We aren't normally trying to transmit in the flasher when the port would
- // be reset, so we can just keep going at this point.
- if (txcmd_pending) {
- if (!uart_send(port, (byte_t*) &txcmd, sizeof(UsbCommand))) {
- PrintAndLog("Sending bytes to proxmark failed");
+ int bytes_completed = 0;
+ while(true) {
+ if (getCommand(response)) {
+ if (response->cmd == CMD_DOWNLOADED_RAW_ADC_SAMPLES_125K) {
+ int copy_bytes = MIN(bytes - bytes_completed, response->arg[1]);
+ memcpy(dest + response->arg[0], response->d.asBytes, copy_bytes);
+ bytes_completed += copy_bytes;
+ } else if (response->cmd == CMD_ACK) {
+ return true;
}
- txcmd_pending = false;
+ }
+
+ if (msclock() - start_time > ms_timeout) {
+ break;
+ }
+
+ if (msclock() - start_time > 2000 && show_warning) {
+ PrintAndLog("Waiting for a response from the proxmark...");
+ PrintAndLog("You can cancel this operation by pressing the pm3 button");
+ show_warning = false;
}
}
- pthread_exit(NULL);
- return NULL;
+ return false;
}
+
+bool OpenProxmark(void *port, bool wait_for_port, int timeout, bool flash_mode) {
+ char *portname = (char *)port;
+ if (!wait_for_port) {
+ sp = uart_open(portname);
+ } else {
+ printf("Waiting for Proxmark to appear on %s ", portname);
+ fflush(stdout);
+ int openCount = 0;
+ do {
+ sp = uart_open(portname);
+ msleep(1000);
+ printf(".");
+ fflush(stdout);
+ } while(++openCount < timeout && (sp == INVALID_SERIAL_PORT || sp == CLAIMED_SERIAL_PORT));
+ printf("\n");
+ }
+
+ // check result of uart opening
+ if (sp == INVALID_SERIAL_PORT) {
+ printf("ERROR: invalid serial port\n");
+ sp = NULL;
+ serial_port_name = NULL;
+ return false;
+ } else if (sp == CLAIMED_SERIAL_PORT) {
+ printf("ERROR: serial port is claimed by another process\n");
+ sp = NULL;
+ serial_port_name = NULL;
+ return false;
+ } else {
+ // start the USB communication thread
+ serial_port_name = portname;
+ conn.run = true;
+ conn.block_after_ACK = flash_mode;
+ pthread_create(&USB_communication_thread, NULL, &uart_communication, &conn);
+ return true;
+ }
+}
+
+
+void CloseProxmark(void) {
+ conn.run = false;
+
+#ifdef __BIONIC__
+ // In Android O and later, if an invalid pthread_t is passed to pthread_join, it calls fatal().
+ // https://github.com/aosp-mirror/platform_bionic/blob/ed16b344e75f422fb36fbfd91fb30de339475880/libc/bionic/pthread_internal.cpp#L116-L128
+ //
+ // In Bionic libc, pthread_t is an integer.
+
+ if (USB_communication_thread != 0) {
+ pthread_join(USB_communication_thread, NULL);
+ }
+#else
+ // pthread_t is a struct on other libc, treat as an opaque memory reference
+ pthread_join(USB_communication_thread, NULL);
+#endif
+
+ if (sp) {
+ uart_close(sp);
+ }
+
+#if defined(__linux__) && !defined(NO_UNLINK)
+ // Fix for linux, it seems that it is extremely slow to release the serial port file descriptor /dev/*
+ //
+ // This may be disabled at compile-time with -DNO_UNLINK (used for a JNI-based serial port on Android).
+ if (serial_port_name) {
+ unlink(serial_port_name);
+ }
+#endif
+
+ // Clean up our state
+ sp = NULL;
+ serial_port_name = NULL;
+#ifdef __BIONIC__
+ memset(&USB_communication_thread, 0, sizeof(pthread_t));
+#endif
+}
+
+
/**
* Waits for a certain response type. This method waits for a maximum of
* ms_timeout milliseconds for a specified response command.
*@brief WaitForResponseTimeout
- * @param cmd command to wait for, or CMD_ANY to take any command.
+ * @param cmd command to wait for, or CMD_UNKNOWN to take any command.
* @param response struct to copy received command into.
* @param ms_timeout
- * @param show_warning
+ * @param show_warning display message after 2 seconds
* @return true if command was returned, otherwise false
*/
-bool WaitForResponseTimeoutW(uint64_t cmd, UsbCommand* response, size_t ms_timeout, bool show_warning) {
+bool WaitForResponseTimeoutW(uint32_t cmd, UsbCommand* response, size_t ms_timeout, bool show_warning) {
+
UsbCommand resp;
#ifdef COMMS_DEBUG
printf("Waiting for %04x cmd\n", cmd);
#endif
-
+
if (response == NULL) {
response = &resp;
}
uint64_t start_time = msclock();
// Wait until the command is received
- for (;;) {
+ while (true) {
while(getCommand(response)) {
- if (cmd == CMD_ANY || response->cmd == cmd) {
+ if (cmd == CMD_UNKNOWN || response->cmd == cmd) {
return true;
}
}
-
+
if (msclock() - start_time > ms_timeout) {
- // We timed out.
break;
}
-
+
if (msclock() - start_time > 2000 && show_warning) {
// 2 seconds elapsed (but this doesn't mean the timeout was exceeded)
PrintAndLog("Waiting for a response from the proxmark...");
- PrintAndLog("Don't forget to cancel its operation first by pressing on the button");
- break;
+ PrintAndLog("You can cancel this operation by pressing the pm3 button");
+ show_warning = false;
}
}
return false;
}
-bool WaitForResponseTimeout(uint64_t cmd, UsbCommand* response, size_t ms_timeout) {
+
+bool WaitForResponseTimeout(uint32_t cmd, UsbCommand* response, size_t ms_timeout) {
return WaitForResponseTimeoutW(cmd, response, ms_timeout, true);
}
-bool WaitForResponse(uint64_t cmd, UsbCommand* response) {
- return WaitForResponseTimeout(cmd, response, -1);
+bool WaitForResponse(uint32_t cmd, UsbCommand* response) {
+ return WaitForResponseTimeoutW(cmd, response, -1, true);
}
+
projects / proxmark3-svn / blobdiff