X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/5bcc76c427b680e28c001783c29c695e3a8d0c17..fd4f21b766a715303f0b1436c9970f5965e644dc:/client/uart.c diff --git a/client/uart.c b/client/uart.c index e4da1951..4b2fee99 100644 --- a/client/uart.c +++ b/client/uart.c @@ -1,7 +1,7 @@ /* - * Proxmark3 generic uart / rs232/ serial port library + * Generic uart / rs232/ serial port library * - * Copyright (c) 2012, Roel Verdult + * Copyright (c) 2013, Roel Verdult * All rights reserved. * * Redistribution and use in source and binary forms, with or without @@ -29,13 +29,9 @@ * @file uart.c * @brief * - * Partly based on uart-code written by Teunis van Beelen, available: - * http://www.teuniz.net/RS-232/index.html - * */ #include "uart.h" -#include "messages.h" // Test if we are dealing with unix operating systems #ifndef _WIN32 @@ -49,175 +45,240 @@ typedef struct { } serial_port_unix; // Set time-out on 30 miliseconds -const struct timeval timeout = { +const struct timeval timeout = { .tv_sec = 0, // 0 second .tv_usec = 30000 // 30000 micro seconds }; -// Work-around to claim uart interface using the c_iflag (software input processing) from the termios struct -#define CCLAIMED 0x80000000 - serial_port uart_open(const char* pcPortName) { serial_port_unix* sp = malloc(sizeof(serial_port_unix)); - if (sp == 0) return INVALID_SERIAL_PORT; - + sp->fd = open(pcPortName, O_RDWR | O_NOCTTY | O_NDELAY | O_NONBLOCK); - if(sp->fd == -1) - { + if(sp->fd == -1) { uart_close(sp); return INVALID_SERIAL_PORT; } - if(tcgetattr(sp->fd,&sp->tiOld) == -1) - { - uart_close(sp); - return INVALID_SERIAL_PORT; + // Finally figured out a way to claim a serial port interface under unix + // We just try to set a (advisory) lock on the file descriptor + struct flock fl; + fl.l_type = F_WRLCK; + fl.l_whence = SEEK_SET; + fl.l_start = 0; + fl.l_len = 0; + fl.l_pid = getpid(); + + // Does the system allows us to place a lock on this file descriptor + if (fcntl(sp->fd, F_SETLK, &fl) == -1) { + // A conflicting lock is held by another process + free(sp); + return CLAIMED_SERIAL_PORT; } - // Make sure the port is not claimed already - if (sp->tiOld.c_iflag & CCLAIMED) - { + // Try to retrieve the old (current) terminal info struct + if(tcgetattr(sp->fd,&sp->tiOld) == -1) { uart_close(sp); - return CLAIMED_SERIAL_PORT; + return INVALID_SERIAL_PORT; } - - // Copy the old terminal info struct + + // Duplicate the (old) terminal info struct sp->tiNew = sp->tiOld; - + + // Configure the serial port sp->tiNew.c_cflag = CS8 | CLOCAL | CREAD; - sp->tiNew.c_iflag = CCLAIMED | IGNPAR; + sp->tiNew.c_iflag = IGNPAR; sp->tiNew.c_oflag = 0; sp->tiNew.c_lflag = 0; - - sp->tiNew.c_cc[VMIN] = 0; // block until n bytes are received - sp->tiNew.c_cc[VTIME] = 0; // block until a timer expires (n * 100 mSec.) - - if(tcsetattr(sp->fd,TCSANOW,&sp->tiNew) == -1) - { + + // Block until n bytes are received + sp->tiNew.c_cc[VMIN] = 0; + // Block until a timer expires (n * 100 mSec.) + sp->tiNew.c_cc[VTIME] = 0; + + // Try to set the new terminal info struct + if(tcsetattr(sp->fd,TCSANOW,&sp->tiNew) == -1) { uart_close(sp); return INVALID_SERIAL_PORT; } + + // Flush all lingering data that may exist + tcflush(sp->fd, TCIOFLUSH); - tcflush(sp->fd, TCIFLUSH); return sp; } -void uart_set_speed(serial_port sp, const uint32_t uiPortSpeed) -{ - DBG("Serial port speed requested to be set to %d bauds.", uiPortSpeed); - // Set port speed (Input and Output) - speed_t stPortSpeed = B9600; - switch(uiPortSpeed) { - case 9600: stPortSpeed = B9600; - break; - case 19200: stPortSpeed = B19200; - break; - case 38400: stPortSpeed = B38400; - break; - case 57600: stPortSpeed = B57600; - break; - case 115200: stPortSpeed = B115200; - break; - case 230400: stPortSpeed = B230400; - break; -#ifdef B460800 - case 460800: stPortSpeed = B460800; - break; -#endif - default: -#ifdef B460800 - ERR("Unable to set serial port speed to %d bauds. Speed value must be one of these constants: 9600 (default), 19200, 38400, 57600, 115200, 230400 or 460800.", uiPortSpeed); -#else - ERR("Unable to set serial port speed to %d bauds. Speed value must be one of these constants: 9600 (default), 19200, 38400, 57600, 115200 or 230400.", uiPortSpeed); -#endif +void uart_close(const serial_port sp) { + serial_port_unix* spu = (serial_port_unix*)sp; + tcflush(spu->fd,TCIOFLUSH); + tcsetattr(spu->fd,TCSANOW,&(spu->tiOld)); + struct flock fl; + fl.l_type = F_UNLCK; + fl.l_whence = SEEK_SET; + fl.l_start = 0; + fl.l_len = 0; + fl.l_pid = getpid(); + fcntl(spu->fd, F_SETLK, &fl); + close(spu->fd); + free(sp); +} + +bool uart_set_speed(serial_port sp, const uint32_t uiPortSpeed) { + const serial_port_unix* spu = (serial_port_unix*)sp; + speed_t stPortSpeed; + switch (uiPortSpeed) { + case 0: stPortSpeed = B0; break; + case 50: stPortSpeed = B50; break; + case 75: stPortSpeed = B75; break; + case 110: stPortSpeed = B110; break; + case 134: stPortSpeed = B134; break; + case 150: stPortSpeed = B150; break; + case 300: stPortSpeed = B300; break; + case 600: stPortSpeed = B600; break; + case 1200: stPortSpeed = B1200; break; + case 1800: stPortSpeed = B1800; break; + case 2400: stPortSpeed = B2400; break; + case 4800: stPortSpeed = B4800; break; + case 9600: stPortSpeed = B9600; break; + case 19200: stPortSpeed = B19200; break; + case 38400: stPortSpeed = B38400; break; +# ifdef B57600 + case 57600: stPortSpeed = B57600; break; +# endif +# ifdef B115200 + case 115200: stPortSpeed = B115200; break; +# endif +# ifdef B230400 + case 230400: stPortSpeed = B230400; break; +# endif +# ifdef B460800 + case 460800: stPortSpeed = B460800; break; +# endif +# ifdef B921600 + case 921600: stPortSpeed = B921600; break; +# endif + default: return false; }; + struct termios ti; + if (tcgetattr(spu->fd,&ti) == -1) return false; + // Set port speed (Input and Output) + cfsetispeed(&ti,stPortSpeed); + cfsetospeed(&ti,stPortSpeed); + return (tcsetattr(spu->fd,TCSANOW,&ti) != -1); +} + +uint32_t uart_get_speed(const serial_port sp) { + struct termios ti; + uint32_t uiPortSpeed; const serial_port_unix* spu = (serial_port_unix*)sp; - cfsetispeed((struct termios*)&spu->tiNew, stPortSpeed); - cfsetospeed((struct termios*)&spu->tiNew, stPortSpeed); - if( tcsetattr(spu->fd, TCSADRAIN, &spu->tiNew) == -1) - { - ERR("Unable to apply new speed settings."); - } + if (tcgetattr(spu->fd,&ti) == -1) return 0; + // Set port speed (Input) + speed_t stPortSpeed = cfgetispeed(&ti); + switch (stPortSpeed) { + case B0: uiPortSpeed = 0; break; + case B50: uiPortSpeed = 50; break; + case B75: uiPortSpeed = 75; break; + case B110: uiPortSpeed = 110; break; + case B134: uiPortSpeed = 134; break; + case B150: uiPortSpeed = 150; break; + case B300: uiPortSpeed = 300; break; + case B600: uiPortSpeed = 600; break; + case B1200: uiPortSpeed = 1200; break; + case B1800: uiPortSpeed = 1800; break; + case B2400: uiPortSpeed = 2400; break; + case B4800: uiPortSpeed = 4800; break; + case B9600: uiPortSpeed = 9600; break; + case B19200: uiPortSpeed = 19200; break; + case B38400: uiPortSpeed = 38400; break; +# ifdef B57600 + case B57600: uiPortSpeed = 57600; break; +# endif +# ifdef B115200 + case B115200: uiPortSpeed = 115200; break; +# endif +# ifdef B230400 + case B230400: uiPortSpeed = 230400; break; +# endif +# ifdef B460800 + case B460800: uiPortSpeed = 460800; break; +# endif +# ifdef B921600 + case B921600: uiPortSpeed = 921600; break; +# endif + default: return 0; + }; + return uiPortSpeed; } -uint32_t uart_get_speed(const serial_port sp) -{ - uint32_t uiPortSpeed = 0; +bool uart_set_parity(serial_port sp, serial_port_parity spp) { + struct termios ti; const serial_port_unix* spu = (serial_port_unix*)sp; - switch (cfgetispeed(&spu->tiNew)) - { - case B9600: uiPortSpeed = 9600; - break; - case B19200: uiPortSpeed = 19200; - break; - case B38400: uiPortSpeed = 38400; - break; - case B57600: uiPortSpeed = 57600; - break; - case B115200: uiPortSpeed = 115200; - break; - case B230400: uiPortSpeed = 230400; - break; -#ifdef B460800 - case B460800: uiPortSpeed = 460800; - break; -#endif + if (tcgetattr(spu->fd,&ti) == -1) return false; + switch(spp) { + case SP_INVALID: return false; + case SP_NONE: ti.c_cflag &= ~(PARENB | PARODD); break; + case SP_EVEN: ti.c_cflag |= PARENB; ti.c_cflag &= ~(PARODD); break; + case SP_ODD: ti.c_cflag |= PARENB | PARODD; break; } - - return uiPortSpeed; + return (tcsetattr(spu->fd,TCSANOW,&ti) != -1); } -void uart_close(const serial_port sp) -{ - tcsetattr(((serial_port_unix*)sp)->fd,TCSANOW,&((serial_port_unix*)sp)->tiOld); - close(((serial_port_unix*)sp)->fd); - free(sp); +serial_port_parity uart_get_parity(const serial_port sp) { + struct termios ti; + const serial_port_unix* spu = (serial_port_unix*)sp; + if (tcgetattr(spu->fd,&ti) == -1) return SP_INVALID; + + if (ti.c_cflag & PARENB) { + if (ti.c_cflag & PARODD) { + return SP_ODD; + } else { + return SP_EVEN; + } + } else { + return SP_NONE; + } } -bool uart_cts(const serial_port sp) -{ +bool uart_cts(const serial_port sp) { char status; if (ioctl(((serial_port_unix*)sp)->fd,TIOCMGET,&status) < 0) return false; return (status & TIOCM_CTS); } -bool uart_receive(const serial_port sp, byte_t* pbtRx, size_t* pszRxLen) -{ +bool uart_receive(const serial_port sp, byte_t* pbtRx, size_t* pszRxLen) { + int res; int byteCount; fd_set rfds; struct timeval tv; - - // Reset the output count + + // Reset the output count *pszRxLen = 0; - + do { // Reset file descriptor FD_ZERO(&rfds); FD_SET(((serial_port_unix*)sp)->fd,&rfds); tv = timeout; res = select(((serial_port_unix*)sp)->fd+1, &rfds, NULL, NULL, &tv); - + // Read error if (res < 0) { - DBG("RX error."); return false; } - + // Read time-out if (res == 0) { if (*pszRxLen == 0) { // Error, we received no data - DBG("RX time-out, buffer empty."); return false; } else { // We received some data, but nothing more is available return true; } } - + // Retrieve the count of the incoming bytes res = ioctl(((serial_port_unix*)sp)->fd, FIONREAD, &byteCount); if (res < 0) return false; @@ -227,47 +288,46 @@ bool uart_receive(const serial_port sp, byte_t* pbtRx, size_t* pszRxLen) // Stop if the OS has some troubles reading the data if (res <= 0) return false; - + *pszRxLen += res; + if(res==byteCount) + return true; + } while (byteCount); return true; } -bool uart_send(const serial_port sp, const byte_t* pbtTx, const size_t szTxLen) -{ +bool uart_send(const serial_port sp, const byte_t* pbtTx, const size_t szTxLen) { int32_t res; size_t szPos = 0; fd_set rfds; struct timeval tv; - - while (szPos < szTxLen) - { + + while (szPos < szTxLen) { // Reset file descriptor FD_ZERO(&rfds); FD_SET(((serial_port_unix*)sp)->fd,&rfds); tv = timeout; res = select(((serial_port_unix*)sp)->fd+1, NULL, &rfds, NULL, &tv); - + // Write error if (res < 0) { - DBG("TX error."); return false; } - + // Write time-out if (res == 0) { - DBG("TX time-out."); return false; } - + // Send away the bytes res = write(((serial_port_unix*)sp)->fd,pbtTx+szPos,szTxLen-szPos); // Stop if the OS has some troubles sending the data if (res <= 0) return false; - + szPos += res; } return true; @@ -276,112 +336,92 @@ bool uart_send(const serial_port sp, const byte_t* pbtTx, const size_t szTxLen) #else // The windows serial port implementation -typedef struct { +typedef struct { HANDLE hPort; // Serial port handle DCB dcb; // Device control settings COMMTIMEOUTS ct; // Serial port time-out configuration } serial_port_windows; -serial_port uart_open(const char* pcPortName) -{ +void upcase(char *p) { + while(*p != '\0') { + if(*p >= 97 && *p <= 122) { + *p -= 32; + } + ++p; + } +} + +serial_port uart_open(const char* pcPortName) { char acPortName[255]; serial_port_windows* sp = malloc(sizeof(serial_port_windows)); - + // Copy the input "com?" to "\\.\COM?" format sprintf(acPortName,"\\\\.\\%s",pcPortName); - _strupr(acPortName); - + upcase(acPortName); + // Try to open the serial port sp->hPort = CreateFileA(acPortName,GENERIC_READ|GENERIC_WRITE,0,NULL,OPEN_EXISTING,0,NULL); - if (sp->hPort == INVALID_HANDLE_VALUE) - { + if (sp->hPort == INVALID_HANDLE_VALUE) { uart_close(sp); return INVALID_SERIAL_PORT; } - + // Prepare the device control memset(&sp->dcb, 0, sizeof(DCB)); sp->dcb.DCBlength = sizeof(DCB); - if(!BuildCommDCBA("baud=9600 data=8 parity=N stop=1",&sp->dcb)) - { + if(!BuildCommDCBA("baud=9600 data=8 parity=N stop=1",&sp->dcb)) { uart_close(sp); return INVALID_SERIAL_PORT; } - + // Update the active serial port - if(!SetCommState(sp->hPort,&sp->dcb)) - { + if(!SetCommState(sp->hPort,&sp->dcb)) { uart_close(sp); return INVALID_SERIAL_PORT; } - + sp->ct.ReadIntervalTimeout = 0; sp->ct.ReadTotalTimeoutMultiplier = 0; sp->ct.ReadTotalTimeoutConstant = 30; sp->ct.WriteTotalTimeoutMultiplier = 0; sp->ct.WriteTotalTimeoutConstant = 30; - - if(!SetCommTimeouts(sp->hPort,&sp->ct)) - { + + if(!SetCommTimeouts(sp->hPort,&sp->ct)) { uart_close(sp); return INVALID_SERIAL_PORT; } - + PurgeComm(sp->hPort, PURGE_RXABORT | PURGE_RXCLEAR); - + return sp; } -void uart_close(const serial_port sp) -{ +void uart_close(const serial_port sp) { CloseHandle(((serial_port_windows*)sp)->hPort); free(sp); } -void uart_set_speed(serial_port sp, const uint32_t uiPortSpeed) -{ +bool uart_set_speed(serial_port sp, const uint32_t uiPortSpeed) { serial_port_windows* spw; - - DBG("Serial port speed requested to be set to %d bauds.", uiPortSpeed); - // Set port speed (Input and Output) - switch(uiPortSpeed) { - case 9600: - case 19200: - case 38400: - case 57600: - case 115200: - case 230400: - case 460800: - break; - default: - ERR("Unable to set serial port speed to %d bauds. Speed value must be one of these constants: 9600 (default), 19200, 38400, 57600, 115200, 230400 or 460800.", uiPortSpeed); - }; - spw = (serial_port_windows*)sp; spw->dcb.BaudRate = uiPortSpeed; - if (!SetCommState(spw->hPort, &spw->dcb)) - { - ERR("Unable to apply new speed settings."); - } + return SetCommState(spw->hPort, &spw->dcb); } -uint32_t uart_get_speed(const serial_port sp) -{ +uint32_t uart_get_speed(const serial_port sp) { const serial_port_windows* spw = (serial_port_windows*)sp; - if (!GetCommState(spw->hPort, (serial_port)&spw->dcb)) + if (!GetCommState(spw->hPort, (serial_port)&spw->dcb)) { return spw->dcb.BaudRate; - + } return 0; } -bool uart_receive(const serial_port sp, byte_t* pbtRx, size_t* pszRxLen) -{ +bool uart_receive(const serial_port sp, byte_t* pbtRx, size_t* pszRxLen) { ReadFile(((serial_port_windows*)sp)->hPort,pbtRx,*pszRxLen,(LPDWORD)pszRxLen,NULL); return (*pszRxLen != 0); } -bool uart_send(const serial_port sp, const byte_t* pbtTx, const size_t szTxLen) -{ +bool uart_send(const serial_port sp, const byte_t* pbtTx, const size_t szTxLen) { DWORD dwTxLen = 0; return WriteFile(((serial_port_windows*)sp)->hPort,pbtTx,szTxLen,&dwTxLen,NULL); return (dwTxLen != 0);