//diag_l0_elm_close : free pdl0d->dl0 (dev), call diag_tty_close.
static int
diag_l0_elm_close(struct diag_l0_device **pdl0d)
{
assert(pdl0d != NULL);
assert(*pdl0d != NULL);
uint8_t buf[]="ATPC\x0D";
elm_sendcmd(*pdl0d, buf, 5, 500, NULL); //close protocol. So clean !
if (pdl0d && *pdl0d) {
struct diag_l0_device *dl0d = *pdl0d;
struct diag_l0_elm_device *dev =
(struct diag_l0_elm_device *)dl0d->l0_int;
/* If debugging, print to stderr */
if (diag_l0_debug & DIAG_DEBUG_CLOSE)
fprintf(stderr, FLFMT "link %p closing\n",
FL, (void *) dl0d);
if (dev)
free(dev);
(void) diag_tty_close(dl0d);
diag_l0_del(*pdl0d);
}
return 0;
}
static void
br_close(struct diag_l0_device *dl0d) {
if (!dl0d) {
return;
}
struct br_device *dev = dl0d->l0_int;
DIAG_DBGM(diag_l0_debug, DIAG_DEBUG_CLOSE, DIAG_DBGLEVEL_V,
FLFMT "link %p closing\n", FL, (void *)dl0d);
diag_tty_close(dev->tty_int);
dev->tty_int = NULL;
dl0d->opened = 0;
return;
}
static int
diag_l0_br_close(struct diag_l0_device **pdl0d)
{
if (pdl0d && *pdl0d) {
struct diag_l0_device *dl0d = *pdl0d;
struct diag_l0_br_device *dev =
(struct diag_l0_br_device *)dl0d->l0_int;
if (diag_l0_debug & DIAG_DEBUG_CLOSE)
fprintf(stderr, FLFMT "link %p closing\n", FL, (void *)dl0d);
if (dev)
free(dev);
(void) diag_tty_close(dl0d);
diag_l0_del(dl0d);
}
return 0;
}
static void
diag_l0_muleng_close(struct diag_l0_device *dl0d)
{
if (!dl0d) return;
struct diag_l0_muleng_device *dev =
(struct diag_l0_muleng_device *)dl0d->l0_int;
if (diag_l0_debug & DIAG_DEBUG_CLOSE)
fprintf(stderr, FLFMT "link %p closing\n",
FL, (void *)dl0d);
if (dev)
free(dev);
diag_tty_close(dl0d);
diag_l0_del(dl0d);
return;
}
//diag_tty_open : open specified port for L0
int diag_tty_open(struct diag_l0_device *dl0d,
const char *portname)
{
int rv;
struct tty_int *wti;
size_t n = strlen(portname) + 1;
COMMTIMEOUTS devtimeouts;
if (!dl0d) return diag_iseterr(DIAG_ERR_GENERAL);
if ((rv=diag_calloc(&wti,1))) {
return diag_iseterr(rv);
}
dl0d->tty_int = wti;
wti->fd = INVALID_HANDLE_VALUE;
//allocate space for portname name
if ((rv=diag_malloc(&wti->name, n))) {
free(dl0d->tty_int);
return diag_iseterr(rv);
}
//Now, in case of errors we can call diag_tty_close() on the dl0d since its members are alloc'ed
strncpy(wti->name, portname, n);
wti->fd=CreateFile(portname, GENERIC_READ | GENERIC_WRITE, 0, NULL,
OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL | FILE_FLAG_NO_BUFFERING | FILE_FLAG_WRITE_THROUGH,
NULL);
//File hande is created as non-overlapped. This may change eventually.
if (wti->fd != INVALID_HANDLE_VALUE) {
if (diag_l0_debug & DIAG_DEBUG_OPEN)
fprintf(stderr, FLFMT "Device %s opened, fd %p\n",
FL, wti->name, wti->fd);
} else {
fprintf(stderr,
FLFMT "Open of device interface \"%s\" failed: %s\n",
FL, wti->name, diag_os_geterr(0));
fprintf(stderr, FLFMT
"(Make sure the device specified corresponds to the\n", FL );
fprintf(stderr,
FLFMT "serial device your interface is connected to.\n", FL);
diag_tty_close(dl0d);
return diag_iseterr(DIAG_ERR_GENERAL);
}
//purge & abort everything.
PurgeComm(wti->fd,PURGE_TXABORT | PURGE_RXABORT | PURGE_TXCLEAR | PURGE_RXCLEAR);
//as opposed to the unix diag_tty.c ; this one doesn't save previous commstate. The next program to use the COM port
//will need to deal with it...
//We will load the DCB with the current comm state. This way we only need to call GetCommState once during a session
//and the DCB should contain coherent initial values
if (! GetCommState(wti->fd, &wti->dcb)) {
fprintf(stderr, FLFMT "Could not get comm state: %s\n",FL, diag_os_geterr(0));
diag_tty_close(dl0d);
return diag_iseterr(DIAG_ERR_GENERAL);
}
//Finally set COMMTIMEOUTS to reasonable values (all in ms) ?
devtimeouts.ReadIntervalTimeout=30; //i.e. more than 30ms between received bytes
devtimeouts.ReadTotalTimeoutMultiplier=5; //timeout per requested byte
devtimeouts.ReadTotalTimeoutConstant=20; // (constant + multiplier*numbytes) = total timeout on read(buf, numbytes)
devtimeouts.WriteTotalTimeoutMultiplier=0; //probably useless as all flow control will be disabled ??
devtimeouts.WriteTotalTimeoutConstant=0;
if (! SetCommTimeouts(wti->fd,&devtimeouts)) {
fprintf(stderr, FLFMT "Could not set comm timeouts: %s\n",FL, diag_os_geterr(0));
diag_tty_close(dl0d);
return diag_iseterr(DIAG_ERR_GENERAL);
}
return 0;
} //diag_tty_open
int diag_tty_open(struct diag_l0_device **ppdl0d,
const char *subinterface,
const struct diag_l0 *dl0,
void *dl0_handle)
{
int rv;
struct diag_ttystate *dt;
struct diag_l0_device *dl0d;
char *endptr;
int iInterface;
const char *tty_template ="/dev/obdII%d";
if (rv=diag_calloc(&dl0d, 1)) //free'd in diag_tty_close
return diag_iseterr(rv);
dl0d->fd = -1;
dl0d->dl0_handle = dl0_handle;
dl0d->dl0 = dl0;
if ((rv=diag_calloc(&dl0d->ttystate, 1))) {
free(dl0d);
return diag_iseterr(rv);
}
*ppdl0d = dl0d;
/*
* XXX this should probably be removed... "historical compatibility" with what ?? Who ?
* For historical compatibility, if the subinterface decodes cleanly
* as an integer we will write it into a string to get the name.
* You can create a symlink to "/dev/obdII<NUMBER>" if you want to,
* or just set the subinterface to a valid device name.
*/
iInterface = strtol(subinterface, &endptr, 10);
if (*endptr == 0) {
/* Entire string is a valid number: Provide compatibility. */
size_t n = strlen(tty_template) + 32;
printf("Warning : using deprecated /dev/obdII<x> subinterface definition.\n");
printf("Support for this will be discontinued shortly...\n");
if ((rv=diag_malloc(&dl0d->name, n))) {
(void)diag_tty_close(ppdl0d);;
return diag_iseterr(rv);
}
(void)snprintf(dl0d->name, n, tty_template, iInterface);
} else {
size_t n = strlen(subinterface) + 1;
if ((rv=diag_malloc(&dl0d->name, n))) {
(void)diag_tty_close(ppdl0d);;
return diag_iseterr(rv);
}
strncpy(dl0d->name, subinterface, n);
}
errno = 0;
#if defined(__linux__) && (TRY_POSIX == 0)
dl0d->fd = open(dl0d->name, O_RDWR);
#else
/*
+* For POSIX behavior: Open serial device non-blocking to avoid
+* modem control issues, then set to blocking.
*/
/* CODE BLOCK */
{
int fl;
dl0d->fd = open(dl0d->name, O_RDWR | O_NONBLOCK);
if (dl0d->fd > 0) {
errno = 0;
if ((fl = fcntl(dl0d->fd, F_GETFL, 0)) < 0) {
fprintf(stderr,
FLFMT "Can't get flags with fcntl on fd %d: %s.\n",
FL, dl0d->fd, strerror(errno));
(void)diag_tty_close(ppdl0d);;
return diag_iseterr(DIAG_ERR_GENERAL);
}
fl &= ~O_NONBLOCK;
errno = 0;
if (fcntl(dl0d->fd, F_SETFL, fl) < 0) {
fprintf(stderr,
FLFMT "Can't set flags with fcntl on fd %d: %s.\n",
FL, dl0d->fd, strerror(errno));
(void)diag_tty_close(ppdl0d);
return diag_iseterr(DIAG_ERR_GENERAL);
}
}
}
#endif
if (dl0d->fd >= 0) {
if (diag_l0_debug & DIAG_DEBUG_OPEN)
fprintf(stderr, FLFMT "Device %s opened, fd %d\n",
FL, dl0d->name, dl0d->fd);
} else {
fprintf(stderr,
FLFMT "Open of device interface \"%s\" failed: %s\n",
FL, dl0d->name, strerror(errno));
fprintf(stderr, FLFMT
"(Make sure the device specified corresponds to the\n", FL );
fprintf(stderr,
FLFMT "serial device your interface is connected to.\n", FL);
(void)diag_tty_close(ppdl0d);
return diag_iseterr(DIAG_ERR_GENERAL);
}
dt = dl0d->ttystate;
/*
* Save original settings so can reset
* device on close - we also set "current" settings to
* those we just read aswell
*/
#if defined(__linux__) && (TRY_POSIX == 0)
if (ioctl(dl0d->fd, TIOCGSERIAL, &dt->dt_osinfo) < 0)
{
fprintf(stderr,
FLFMT "open: Ioctl TIOCGSERIAL failed %d\n", FL, errno);
(void)diag_tty_close(ppdl0d);
return diag_iseterr(DIAG_ERR_GENERAL);
}
dt->dt_sinfo = dt->dt_osinfo;
#endif
if (ioctl(dl0d->fd, TIOCMGET, &dt->dt_modemflags) < 0)
{
fprintf(stderr,
FLFMT "open: Ioctl TIOCMGET failed: %s\n", FL, strerror(errno));
(void)diag_tty_close(ppdl0d);
return diag_iseterr(DIAG_ERR_GENERAL);
}
if (tcgetattr(dl0d->fd, &dt->dt_otinfo) < 0)
{
fprintf(stderr, FLFMT "open: tcgetattr failed %s\n",
FL, strerror(errno));
(void)diag_tty_close(ppdl0d);
return diag_iseterr(DIAG_ERR_GENERAL);
}
dt->dt_tinfo = dt->dt_otinfo;
return 0;
}
int diag_tty_open(struct diag_l0_device *dl0d,
const char *portname)
{
int rv;
struct unix_tty_int *uti;
#if defined(_POSIX_TIMERS) && (SEL_TIMEOUT==S_POSIX || SEL_TIMEOUT==S_AUTO)
struct sigevent to_sigev;
struct sigaction sa;
clockid_t timeout_clkid;
#endif
assert(dl0d != NULL);
if (dl0d->tty_int) return diag_iseterr(DIAG_ERR_GENERAL);
if ((rv=diag_calloc(&uti,1))) {
return diag_iseterr(rv);
}
#if defined(_POSIX_TIMERS) && (SEL_TIMEOUT==S_POSIX || SEL_TIMEOUT==S_AUTO)
//set-up the r/w timeouts clock - here we just create it; it will be armed when needed
#ifdef _POSIX_MONOTONIC_CLOCK
timeout_clkid = CLOCK_MONOTONIC;
#else
timeout_clkid = CLOCK_REALTIME;
#endif // _POSIX_MONOTONIC_CLOCK
sa.sa_flags = SA_SIGINFO;
sa.sa_sigaction = diag_tty_rw_timeout_handler;
sigemptyset(&sa.sa_mask);
if(sigaction(SIGUSR1, &sa, NULL) != 0) {
fprintf(stderr, FLFMT "Could not set-up action for timeout timer... report this\n", FL);
free(uti);
return diag_iseterr(DIAG_ERR_GENERAL);
}
to_sigev.sigev_notify = SIGEV_SIGNAL;
to_sigev.sigev_signo = SIGUSR1;
to_sigev.sigev_value.sival_ptr = uti;
if(timer_create(timeout_clkid, &to_sigev, &uti->timerid) != 0) {
fprintf(stderr, FLFMT "Could not create timeout timer... report this\n", FL);
free(uti);
return diag_iseterr(DIAG_ERR_GENERAL);
}
#endif
uti->fd = DL0D_INVALIDHANDLE;
size_t n = strlen(portname) + 1;
if ((rv=diag_malloc(&uti->name, n))) {
free(uti);
return diag_iseterr(rv);
}
strncpy(uti->name, portname, n);
dl0d->tty_int = uti;
//past this point, we can call diag_tty_close(dl0d) to abort in case of errors
errno = 0;
#if defined(O_NONBLOCK) && (SEL_TTYOPEN==S_ALT1 || SEL_TTYOPEN==S_AUTO)
/*
* For POSIX behavior: Open serial device non-blocking to avoid
* modem control issues, then set to blocking.
*/
{
int fl;
uti->fd = open(uti->name, O_RDWR | O_NONBLOCK);
if (uti->fd > 0) {
errno = 0;
if ((fl = fcntl(uti->fd, F_GETFL, 0)) < 0) {
fprintf(stderr,
FLFMT "Can't get flags with fcntl on fd %d: %s.\n",
FL, uti->fd, strerror(errno));
diag_tty_close(dl0d);
return diag_iseterr(DIAG_ERR_GENERAL);
}
fl &= ~O_NONBLOCK;
errno = 0;
if (fcntl(uti->fd, F_SETFL, fl) < 0) {
fprintf(stderr,
FLFMT "Can't set flags with fcntl on fd %d: %s.\n",
FL, uti->fd, strerror(errno));
diag_tty_close(dl0d);
return diag_iseterr(DIAG_ERR_GENERAL);
}
}
}
#else
#ifndef O_NONBLOCK
#warning No O_NONBLOCK on your system ?! Please report this
#endif
uti->fd = open(uti->name, O_RDWR);
#endif // O_NONBLOCK
if (uti->fd >= 0) {
if (diag_l0_debug & DIAG_DEBUG_OPEN)
fprintf(stderr, FLFMT "Device %s opened, fd %d\n",
FL, uti->name, uti->fd);
} else {
fprintf(stderr,
FLFMT "Could not open \"%s\" : %s. "
"Make sure the device specified corresponds to the "
"serial device your interface is connected to.\n",
FL, uti->name, strerror(errno));
diag_tty_close(dl0d);
return diag_iseterr(DIAG_ERR_GENERAL);
}
/*
* Save original settings so can reset
* device on close - we also set "current" settings to
* those we just read aswell
*/
#if defined(__linux__)
if (ioctl(uti->fd, TIOCGSERIAL, &uti->ss_orig) < 0) {
fprintf(stderr,
FLFMT "open: TIOCGSERIAL failed: %s\n", FL, strerror(errno));
uti->tioc_works = 0;
} else {
uti->ss_cur = uti->ss_orig;
uti->tioc_works = 1;
}
#endif
if (ioctl(uti->fd, TIOCMGET, &uti->modemflags) < 0) {
fprintf(stderr,
FLFMT "open: TIOCMGET failed: %s\n", FL, strerror(errno));
diag_tty_close(dl0d);
return diag_iseterr(DIAG_ERR_GENERAL);
}
#ifdef USE_TERMIOS2
rv = ioctl(uti->fd, TCGETS, &uti->st_orig);
#else
rv = tcgetattr(uti->fd, &uti->st_orig);
#endif
if (rv != 0) {
fprintf(stderr, FLFMT "open: could not get orig settings: %s\n",
FL, strerror(errno));
diag_tty_close(dl0d);
return diag_iseterr(DIAG_ERR_GENERAL);
}
//and set common flags
uti->st_cur = uti->st_orig;
/* "stty raw"-like iflag settings: */
/* Clear a bunch of un-needed flags */
uti->st_cur.c_iflag &= ~ (IGNBRK | BRKINT | IGNPAR | PARMRK
| INPCK | ISTRIP | INLCR | IGNCR | ICRNL | IXON | IXOFF
| IXANY | IMAXBEL);
#ifdef __linux__
uti->st_cur.c_iflag &= ~(IUCLC); /* non-posix; disable ucase/lcase conversion */
#endif
uti->st_cur.c_oflag &= ~(OPOST); //disable impl-defined output processing
/* Disable canonical input and keyboard signals.
+* There is no need to also clear the many ECHOXX flags, both because
+* many systems have non-POSIX flags and also because the ECHO
+* flags don't don't matter when ICANON is clear.
*/
/* CJH: However, taking 'man termios' at its word, the ECHO flag is
*not* affected by ICANON, and it seems we do need to clear it */
uti->st_cur.c_lflag &= ~( ICANON | ISIG | ECHO | IEXTEN);
uti->st_cur.c_cflag &= ~( CRTSCTS ); //non-posix; disables hardware flow ctl
uti->st_cur.c_cflag |= (CLOCAL | CREAD); //ignore modem control lines; enable read
uti->st_cur.c_cc[VMIN] = 1; //Minimum # of bytes before read() returns (default: 0!!!)
//and update termios with new flags.
#ifdef USE_TERMIOS2
rv = ioctl(uti->fd, TCSETS, &uti->st_cur);
rv |= ioctl(uti->fd, TCGETS2, &uti->st2_cur);
#else
rv=tcsetattr(uti->fd, TCSAFLUSH, &uti->st_cur);
#endif
if (rv != 0) {
fprintf(stderr, FLFMT "open: can't set input flags: %s.\n",
FL, strerror(errno));
diag_tty_close(dl0d);
return diag_iseterr(DIAG_ERR_GENERAL);
}
//arbitrarily set the single byte write timeout to 1ms
uti->byte_write_timeout_us = 1000ul;
return 0;
}
