[proxmark3-svn] / uart / uart_posix.c

/*
 * Generic uart / rs232/ serial port library
 *
 * Copyright (c) 2013, Roel Verdult
 * Copyright (c) 2018 Google
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 1. Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the copyright holders nor the
 * names of its contributors may be used to endorse or promote products
 * derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * @file uart_posix.c
 *
 * This version of the library has functionality removed which was not used by
 * proxmark3 project.
 */

// Test if we are dealing with posix operating systems
#ifndef _WIN32
#define _DEFAULT_SOURCE

#include "uart.h"

#include <termios.h>
#include <sys/ioctl.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <limits.h>
#include <sys/time.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <arpa/inet.h>
#include <netdb.h>

// Fix missing definition on OS X.
// Taken from https://github.com/unbit/uwsgi/commit/b608eb1772641d525bfde268fe9d6d8d0d5efde7
#ifndef SOL_TCP
#define SOL_TCP IPPROTO_TCP
#endif

typedef struct termios term_info;
typedef struct {
  int fd;           // Serial port file descriptor
  term_info tiOld;  // Terminal info before using the port
  term_info tiNew;  // Terminal info during the transaction
} serial_port_unix;

// Set time-out on 30 miliseconds
struct timeval timeout = {
  .tv_sec  =     0, // 0 second
  .tv_usec = 30000  // 30000 micro seconds
};

serial_port uart_open(const char* pcPortName)
{
  serial_port_unix* sp = malloc(sizeof(serial_port_unix));
  if (sp == 0) return INVALID_SERIAL_PORT;
  
  if (memcmp(pcPortName, "tcp:", 4) == 0) {
    struct addrinfo *addr = NULL, *rp;
    char *addrstr = strdup(pcPortName + 4);
    if (addrstr == NULL) {
      printf("Error: strdup\n");
      return INVALID_SERIAL_PORT;
    }
    char *colon = strrchr(addrstr, ':');
    char *portstr;

    // Set time-out to 300 miliseconds only for TCP port
    timeout.tv_usec = 300000;

    if (colon) {
      portstr = colon + 1;
      *colon = '\0';
    } else
      portstr = "7901";

    struct addrinfo info;

    memset (&info, 0, sizeof(info));

    info.ai_socktype = SOCK_STREAM;

    int s = getaddrinfo(addrstr, portstr, &info, &addr);
    if (s != 0) {
      printf("Error: getaddrinfo: %s\n", gai_strerror(s));
      return INVALID_SERIAL_PORT;
    }

    int sfd;
    for (rp = addr; rp != NULL; rp = rp->ai_next) {
      sfd = socket(rp->ai_family, rp->ai_socktype,
		   rp->ai_protocol);
      if (sfd == -1)
	continue;

      if (connect(sfd, rp->ai_addr, rp->ai_addrlen) != -1)
	break;

      close(sfd);
    }

    if (rp == NULL) {               /* No address succeeded */
      printf("Error: Could not connect\n");
      return INVALID_SERIAL_PORT;
    }

    freeaddrinfo(addr);
    free(addrstr);

    sp->fd = sfd;

    int one = 1;
    setsockopt(sp->fd, SOL_TCP, TCP_NODELAY, &one, sizeof(one));
    return sp;
  }

  sp->fd = open(pcPortName, O_RDWR | O_NOCTTY | O_NDELAY | O_NONBLOCK);
  if(sp->fd == -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;
  }

  // Try to retrieve the old (current) terminal info struct
  if(tcgetattr(sp->fd,&sp->tiOld) == -1) {
    uart_close(sp);
    return INVALID_SERIAL_PORT;
  }
  
  // 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 = IGNPAR;
  sp->tiNew.c_oflag = 0;
  sp->tiNew.c_lflag = 0;
    
  // 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);

  return sp;
}

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_receive(const serial_port sp, uint8_t* pbtRx, size_t pszMaxRxLen, size_t* pszRxLen) {
  int res;
  int byteCount;
  fd_set rfds;
  struct timeval tv;
  
  // 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) {
      return false;
    }
 
    // Read time-out
    if (res == 0) {
      if (*pszRxLen == 0) {
        // Error, we received no data
        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;
    
    // Cap the number of bytes, so we don't overrun the buffer
    if (pszMaxRxLen - (*pszRxLen) < byteCount) {
    	byteCount = pszMaxRxLen - (*pszRxLen);
    }

    // There is something available, read the data
    res = read(((serial_port_unix*)sp)->fd, pbtRx+(*pszRxLen), byteCount);

    // Stop if the OS has some troubles reading the data
    if (res <= 0) return false;
 
    *pszRxLen += res;

    if (*pszRxLen == pszMaxRxLen) {
    	// We have all the data we wanted.
      return true;
    }
    
  } while (byteCount);

  return true;
}

bool uart_send(const serial_port sp, const uint8_t* pbtTx, const size_t szTxLen) {
  int32_t res;
  size_t szPos = 0;
  fd_set rfds;
  struct timeval tv;
  
  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) {
      return false;
    }
    
    // Write time-out
    if (res == 0) {
      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;
}

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;
  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;
}

#endif
Commit	Line	Data
5bcc76c4	1	/*
13dbdd6b	2	* Generic uart / rs232/ serial port library
5bcc76c4	3	*
13dbdd6b	4	* Copyright (c) 2013, Roel Verdult
d664113a	5	* Copyright (c) 2018 Google
5bcc76c4	6	* All rights reserved.
	7	*
	8	* Redistribution and use in source and binary forms, with or without
	9	* modification, are permitted provided that the following conditions are met:
	10	* 1. Redistributions of source code must retain the above copyright
	11	* notice, this list of conditions and the following disclaimer.
	12	* 2. Redistributions in binary form must reproduce the above copyright
	13	* notice, this list of conditions and the following disclaimer in the
	14	* documentation and/or other materials provided with the distribution.
	15	* 3. Neither the name of the copyright holders nor the
	16	* names of its contributors may be used to endorse or promote products
	17	* derived from this software without specific prior written permission.
	18	*
	19	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
	20	* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
	21	* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
	22	* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
	23	* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
	24	* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
	25	* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
	26	* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	27	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
	28	* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	29	*
067bfc8b	30	* @file uart_posix.c
5bcc76c4	31	*
067bfc8b MF	32	* This version of the library has functionality removed which was not used by
067bfc8b MF	33	* proxmark3 project.
5bcc76c4	34	*/
5bcc76c4	35
067bfc8b	36	// Test if we are dealing with posix operating systems
5bcc76c4	37	#ifndef _WIN32
d664113a VS	38	#define _DEFAULT_SOURCE
	39
	40	#include "uart.h"
	41
5bcc76c4	42	#include <termios.h>
067bfc8b MF	43	#include <sys/ioctl.h>
	44	#include <unistd.h>
	45	#include <fcntl.h>
	46	#include <sys/types.h>
	47	#include <sys/stat.h>
	48	#include <limits.h>
	49	#include <sys/time.h>
	50	#include <errno.h>
d664113a VS	51	#include <sys/types.h>
	52	#include <sys/socket.h>
	53	#include <netinet/in.h>
	54	#include <netinet/tcp.h>
	55	#include <arpa/inet.h>
	56	#include <netdb.h>
067bfc8b	57
a015ef37 JMP	58	// Fix missing definition on OS X.
	59	// Taken from https://github.com/unbit/uwsgi/commit/b608eb1772641d525bfde268fe9d6d8d0d5efde7
	60	#ifndef SOL_TCP
	61	#define SOL_TCP IPPROTO_TCP
	62	#endif
	63
5bcc76c4	64	typedef struct termios term_info;
	65	typedef struct {
	66	int fd; // Serial port file descriptor
	67	term_info tiOld; // Terminal info before using the port
	68	term_info tiNew; // Terminal info during the transaction
	69	} serial_port_unix;
	70
	71	// Set time-out on 30 miliseconds
7afa751a	72	struct timeval timeout = {
5bcc76c4	73	.tv_sec = 0, // 0 second
7afa751a	74	.tv_usec = 30000 // 30000 micro seconds
5bcc76c4	75	};
5bcc76c4	76
5bcc76c4	77	serial_port uart_open(const char* pcPortName)
	78	{
	79	serial_port_unix* sp = malloc(sizeof(serial_port_unix));
5bcc76c4	80	if (sp == 0) return INVALID_SERIAL_PORT;
13dbdd6b	81
d664113a	82	if (memcmp(pcPortName, "tcp:", 4) == 0) {
d38bb3ac	83	struct addrinfo addr = NULL, rp;
d664113a VS	84	char *addrstr = strdup(pcPortName + 4);
	85	if (addrstr == NULL) {
	86	printf("Error: strdup\n");
	87	return INVALID_SERIAL_PORT;
	88	}
	89	char *colon = strrchr(addrstr, ':');
	90	char *portstr;
7afa751a F	91
	92	// Set time-out to 300 miliseconds only for TCP port
	93	timeout.tv_usec = 300000;
	94
d664113a VS	95	if (colon) {
	96	portstr = colon + 1;
	97	*colon = '\0';
	98	} else
	99	portstr = "7901";
	100
d38bb3ac VS	101	struct addrinfo info;
	102
	103	memset (&info, 0, sizeof(info));
	104
	105	info.ai_socktype = SOCK_STREAM;
	106
	107	int s = getaddrinfo(addrstr, portstr, &info, &addr);
d664113a VS	108	if (s != 0) {
	109	printf("Error: getaddrinfo: %s\n", gai_strerror(s));
	110	return INVALID_SERIAL_PORT;
	111	}
	112
	113	int sfd;
	114	for (rp = addr; rp != NULL; rp = rp->ai_next) {
	115	sfd = socket(rp->ai_family, rp->ai_socktype,
	116	rp->ai_protocol);
	117	if (sfd == -1)
	118	continue;
	119
	120	if (connect(sfd, rp->ai_addr, rp->ai_addrlen) != -1)
	121	break;
	122
	123	close(sfd);
	124	}
	125
	126	if (rp == NULL) { /* No address succeeded */
	127	printf("Error: Could not connect\n");
	128	return INVALID_SERIAL_PORT;
	129	}
	130
	131	freeaddrinfo(addr);
	132	free(addrstr);
	133
	134	sp->fd = sfd;
	135
	136	int one = 1;
	137	setsockopt(sp->fd, SOL_TCP, TCP_NODELAY, &one, sizeof(one));
	138	return sp;
	139	}
	140
5bcc76c4	141	sp->fd = open(pcPortName, O_RDWR \| O_NOCTTY \| O_NDELAY \| O_NONBLOCK);
62ee4fed	142	if(sp->fd == -1) {
5bcc76c4	143	uart_close(sp);
	144	return INVALID_SERIAL_PORT;
	145	}
62ee4fed	146
	147	// Finally figured out a way to claim a serial port interface under unix
	148	// We just try to set a (advisory) lock on the file descriptor
	149	struct flock fl;
	150	fl.l_type = F_WRLCK;
	151	fl.l_whence = SEEK_SET;
	152	fl.l_start = 0;
	153	fl.l_len = 0;
	154	fl.l_pid = getpid();
13dbdd6b	155
62ee4fed	156	// Does the system allows us to place a lock on this file descriptor
	157	if (fcntl(sp->fd, F_SETLK, &fl) == -1) {
	158	// A conflicting lock is held by another process
ca4714cd	159	free(sp);
62ee4fed	160	return CLAIMED_SERIAL_PORT;
5bcc76c4	161	}
62ee4fed	162
	163	// Try to retrieve the old (current) terminal info struct
	164	if(tcgetattr(sp->fd,&sp->tiOld) == -1) {
5bcc76c4	165	uart_close(sp);
62ee4fed	166	return INVALID_SERIAL_PORT;
5bcc76c4	167	}
13dbdd6b	168
62ee4fed	169	// Duplicate the (old) terminal info struct
5bcc76c4	170	sp->tiNew = sp->tiOld;
13dbdd6b	171
62ee4fed	172	// Configure the serial port
5bcc76c4	173	sp->tiNew.c_cflag = CS8 \| CLOCAL \| CREAD;
62ee4fed	174	sp->tiNew.c_iflag = IGNPAR;
5bcc76c4	175	sp->tiNew.c_oflag = 0;
5bcc76c4	176	sp->tiNew.c_lflag = 0;
62ee4fed	177
	178	// Block until n bytes are received
	179	sp->tiNew.c_cc[VMIN] = 0;
	180	// Block until a timer expires (n * 100 mSec.)
	181	sp->tiNew.c_cc[VTIME] = 0;
0a24369c	182
62ee4fed	183	// Try to set the new terminal info struct
62ee4fed	184	if(tcsetattr(sp->fd,TCSANOW,&sp->tiNew) == -1) {
5bcc76c4	185	uart_close(sp);
	186	return INVALID_SERIAL_PORT;
	187	}
13dbdd6b	188
62ee4fed	189	// Flush all lingering data that may exist
0a24369c	190	tcflush(sp->fd, TCIOFLUSH);
62ee4fed	191
5bcc76c4	192	return sp;
	193	}
	194
62ee4fed	195	void uart_close(const serial_port sp) {
	196	serial_port_unix* spu = (serial_port_unix*)sp;
	197	tcflush(spu->fd,TCIOFLUSH);
	198	tcsetattr(spu->fd,TCSANOW,&(spu->tiOld));
	199	struct flock fl;
	200	fl.l_type = F_UNLCK;
	201	fl.l_whence = SEEK_SET;
	202	fl.l_start = 0;
	203	fl.l_len = 0;
	204	fl.l_pid = getpid();
	205	fcntl(spu->fd, F_SETLK, &fl);
	206	close(spu->fd);
	207	free(sp);
	208	}
	209
f5ecd97b	210	bool uart_receive(const serial_port sp, uint8_t* pbtRx, size_t pszMaxRxLen, size_t* pszRxLen) {
5bcc76c4	211	int res;
	212	int byteCount;
	213	fd_set rfds;
	214	struct timeval tv;
13dbdd6b	215
13dbdd6b	216	// Reset the output count
5bcc76c4	217	*pszRxLen = 0;
13dbdd6b	218
5bcc76c4	219	do {
	220	// Reset file descriptor
	221	FD_ZERO(&rfds);
	222	FD_SET(((serial_port_unix*)sp)->fd,&rfds);
	223	tv = timeout;
	224	res = select(((serial_port_unix*)sp)->fd+1, &rfds, NULL, NULL, &tv);
13dbdd6b	225
5bcc76c4	226	// Read error
5bcc76c4	227	if (res < 0) {
5bcc76c4	228	return false;
5bcc76c4	229	}
babfcaa0	230
5bcc76c4	231	// Read time-out
	232	if (res == 0) {
	233	if (*pszRxLen == 0) {
	234	// Error, we received no data
5bcc76c4	235	return false;
	236	} else {
	237	// We received some data, but nothing more is available
	238	return true;
	239	}
	240	}
babfcaa0	241
5bcc76c4	242	// Retrieve the count of the incoming bytes
	243	res = ioctl(((serial_port_unix*)sp)->fd, FIONREAD, &byteCount);
	244	if (res < 0) return false;
067bfc8b MF	245
	246	// Cap the number of bytes, so we don't overrun the buffer
	247	if (pszMaxRxLen - (*pszRxLen) < byteCount) {
	248	byteCount = pszMaxRxLen - (*pszRxLen);
	249	}
babfcaa0	250
5bcc76c4	251	// There is something available, read the data
067bfc8b	252	res = read(((serial_port_unix)sp)->fd, pbtRx+(pszRxLen), byteCount);
babfcaa0	253
5bcc76c4	254	// Stop if the OS has some troubles reading the data
5bcc76c4	255	if (res <= 0) return false;
babfcaa0	256
5bcc76c4	257	*pszRxLen += res;
babfcaa0	258
067bfc8b MF	259	if (*pszRxLen == pszMaxRxLen) {
	260	// We have all the data we wanted.
	261	return true;
	262	}
13dbdd6b	263
5bcc76c4	264	} while (byteCount);
babfcaa0	265
5bcc76c4	266	return true;
	267	}
	268
f5ecd97b	269	bool uart_send(const serial_port sp, const uint8_t* pbtTx, const size_t szTxLen) {
5bcc76c4	270	int32_t res;
	271	size_t szPos = 0;
	272	fd_set rfds;
	273	struct timeval tv;
13dbdd6b	274
62ee4fed	275	while (szPos < szTxLen) {
5bcc76c4	276	// Reset file descriptor
	277	FD_ZERO(&rfds);
	278	FD_SET(((serial_port_unix*)sp)->fd,&rfds);
	279	tv = timeout;
	280	res = select(((serial_port_unix*)sp)->fd+1, NULL, &rfds, NULL, &tv);
13dbdd6b	281
5bcc76c4	282	// Write error
5bcc76c4	283	if (res < 0) {
5bcc76c4	284	return false;
5bcc76c4	285	}
13dbdd6b	286
5bcc76c4	287	// Write time-out
5bcc76c4	288	if (res == 0) {
5bcc76c4	289	return false;
5bcc76c4	290	}
13dbdd6b	291
5bcc76c4	292	// Send away the bytes
	293	res = write(((serial_port_unix*)sp)->fd,pbtTx+szPos,szTxLen-szPos);
	294
	295	// Stop if the OS has some troubles sending the data
	296	if (res <= 0) return false;
13dbdd6b	297
5bcc76c4	298	szPos += res;
	299	}
	300	return true;
	301	}
	302
13dbdd6b	303	bool uart_set_speed(serial_port sp, const uint32_t uiPortSpeed) {
067bfc8b MF	304	const serial_port_unix* spu = (serial_port_unix*)sp;
	305	speed_t stPortSpeed;
	306	switch (uiPortSpeed) {
	307	case 0: stPortSpeed = B0; break;
	308	case 50: stPortSpeed = B50; break;
	309	case 75: stPortSpeed = B75; break;
	310	case 110: stPortSpeed = B110; break;
	311	case 134: stPortSpeed = B134; break;
	312	case 150: stPortSpeed = B150; break;
	313	case 300: stPortSpeed = B300; break;
	314	case 600: stPortSpeed = B600; break;
	315	case 1200: stPortSpeed = B1200; break;
	316	case 1800: stPortSpeed = B1800; break;
	317	case 2400: stPortSpeed = B2400; break;
	318	case 4800: stPortSpeed = B4800; break;
	319	case 9600: stPortSpeed = B9600; break;
	320	case 19200: stPortSpeed = B19200; break;
	321	case 38400: stPortSpeed = B38400; break;
	322	# ifdef B57600
	323	case 57600: stPortSpeed = B57600; break;
	324	# endif
	325	# ifdef B115200
	326	case 115200: stPortSpeed = B115200; break;
	327	# endif
	328	# ifdef B230400
	329	case 230400: stPortSpeed = B230400; break;
	330	# endif
	331	# ifdef B460800
	332	case 460800: stPortSpeed = B460800; break;
	333	# endif
	334	# ifdef B921600
	335	case 921600: stPortSpeed = B921600; break;
	336	# endif
	337	default: return false;
	338	};
	339	struct termios ti;
	340	if (tcgetattr(spu->fd,&ti) == -1) return false;
	341	// Set port speed (Input and Output)
	342	cfsetispeed(&ti,stPortSpeed);
	343	cfsetospeed(&ti,stPortSpeed);
	344	return (tcsetattr(spu->fd,TCSANOW,&ti) != -1);
5bcc76c4	345	}
5bcc76c4	346
13dbdd6b	347	uint32_t uart_get_speed(const serial_port sp) {
067bfc8b MF	348	struct termios ti;
	349	uint32_t uiPortSpeed;
	350	const serial_port_unix* spu = (serial_port_unix*)sp;
	351	if (tcgetattr(spu->fd,&ti) == -1) return 0;
	352	// Set port speed (Input)
	353	speed_t stPortSpeed = cfgetispeed(&ti);
	354	switch (stPortSpeed) {
	355	case B0: uiPortSpeed = 0; break;
	356	case B50: uiPortSpeed = 50; break;
	357	case B75: uiPortSpeed = 75; break;
	358	case B110: uiPortSpeed = 110; break;
	359	case B134: uiPortSpeed = 134; break;
	360	case B150: uiPortSpeed = 150; break;
	361	case B300: uiPortSpeed = 300; break;
	362	case B600: uiPortSpeed = 600; break;
	363	case B1200: uiPortSpeed = 1200; break;
	364	case B1800: uiPortSpeed = 1800; break;
	365	case B2400: uiPortSpeed = 2400; break;
	366	case B4800: uiPortSpeed = 4800; break;
	367	case B9600: uiPortSpeed = 9600; break;
	368	case B19200: uiPortSpeed = 19200; break;
	369	case B38400: uiPortSpeed = 38400; break;
	370	# ifdef B57600
	371	case B57600: uiPortSpeed = 57600; break;
	372	# endif
	373	# ifdef B115200
	374	case B115200: uiPortSpeed = 115200; break;
	375	# endif
	376	# ifdef B230400
	377	case B230400: uiPortSpeed = 230400; break;
	378	# endif
	379	# ifdef B460800
	380	case B460800: uiPortSpeed = 460800; break;
	381	# endif
	382	# ifdef B921600
	383	case B921600: uiPortSpeed = 921600; break;
	384	# endif
	385	default: return 0;
	386	};
	387	return uiPortSpeed;
5bcc76c4	388	}
	389
	390	#endif
067bfc8b	391