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/*
* tty.c:
*
* Copyright (c) 2008 James McKenzie <james@fishsoup.dhs.org>,
* All rights reserved.
*
*/
static char rcsid[] = "$Id$";
/*
* $Log$
* Revision 1.26 2008/03/10 11:49:33 james
* *** empty log message ***
*
* Revision 1.25 2008/03/07 13:16:02 james
* *** empty log message ***
*
* Revision 1.24 2008/03/07 12:37:04 james
* *** empty log message ***
*
* Revision 1.23 2008/03/06 16:49:39 james
* *** empty log message ***
*
* Revision 1.22 2008/03/06 16:49:05 james
* *** empty log message ***
*
* Revision 1.21 2008/03/03 06:04:42 james
* *** empty log message ***
*
* Revision 1.20 2008/03/02 10:37:56 james
* *** empty log message ***
*
* Revision 1.19 2008/02/28 16:57:52 james
* *** empty log message ***
*
* Revision 1.18 2008/02/28 16:37:16 james
* *** empty log message ***
*
* Revision 1.17 2008/02/28 15:37:06 james
* *** empty log message ***
*
* Revision 1.16 2008/02/28 12:12:25 james
* *** empty log message ***
*
* Revision 1.15 2008/02/28 00:10:44 james
* *** empty log message ***
*
* Revision 1.14 2008/02/23 13:05:58 staffcvs
* *** empty log message ***
*
* Revision 1.13 2008/02/23 11:48:37 james
* *** empty log message ***
*
* Revision 1.12 2008/02/22 23:39:27 james
* *** empty log message ***
*
* Revision 1.11 2008/02/20 18:31:53 james
* *** empty log message ***
*
* Revision 1.10 2008/02/15 23:52:12 james
* *** empty log message ***
*
* Revision 1.9 2008/02/15 03:32:07 james
* *** empty log message ***
*
* Revision 1.8 2008/02/14 10:36:18 james
* *** empty log message ***
*
* Revision 1.7 2008/02/14 10:34:30 james
* *** empty log message ***
*
* Revision 1.6 2008/02/13 16:59:34 james
* *** empty log message ***
*
* Revision 1.5 2008/02/13 16:57:29 james
* *** empty log message ***
*
* Revision 1.4 2008/02/12 22:36:46 james
* *** empty log message ***
*
* Revision 1.3 2008/02/09 15:47:28 james
* *** empty log message ***
*
*/
#include "project.h"
static int
speed_t_to_baud (speed_t s)
{
switch (s) {
#ifdef B0
case B0:
return 0;
#endif
#ifdef B50
case B50:
return 50;
#endif
#ifdef B75
case B75:
return 75;
#endif
#ifdef B110
case B110:
return 110;
#endif
#ifdef B134
case B134:
return 134;
#endif
#ifdef B150
case B150:
return 150;
#endif
#ifdef B200
case B200:
return 200;
#endif
#ifdef B300
case B300:
return 300;
#endif
#ifdef B600
case B600:
return 600;
#endif
#ifdef B1200
case B1200:
return 1200;
#endif
#ifdef B1800
case B1800:
return 1800;
#endif
#ifdef B2400
case B2400:
return 2400;
#endif
#ifdef B4800
case B4800:
return 4800;
#endif
#ifdef B9600
case B9600:
return 9600;
#endif
#ifdef B19200
case B19200:
return 19200;
#endif
#ifdef B38400
case B38400:
return 38400;
#endif
#ifdef B57600
case B57600:
return 57600;
#endif
#ifdef B115200
case B115200:
return 115200;
#endif
#ifdef B230400
case B230400:
return 230400;
#endif
}
return -1;
}
static speed_t
baud_to_speed_t (int baud)
{
switch (baud) {
#ifdef B0
case 0:
return B0;
#endif
#ifdef B50
case 50:
return B50;
#endif
#ifdef B75
case 75:
return B75;
#endif
#ifdef B110
case 110:
return B110;
#endif
#ifdef B134
case 134:
return B134;
#endif
#ifdef B150
case 150:
return B150;
#endif
#ifdef B200
case 200:
return B200;
#endif
#ifdef B300
case 300:
return B300;
#endif
#ifdef B600
case 600:
return B600;
#endif
#ifdef B1200
case 1200:
return B1200;
#endif
#ifdef B1800
case 1800:
return B1800;
#endif
#ifdef B2400
case 2400:
return B2400;
#endif
#ifdef B4800
case 4800:
return B4800;
#endif
#ifdef B9600
case 9600:
return B9600;
#endif
#ifdef B19200
case 19200:
return B19200;
#endif
#ifdef B38400
case 38400:
return B38400;
#endif
#ifdef B57600
case 57600:
return B57600;
#endif
#ifdef B115200
case 115200:
return B115200;
#endif
#ifdef B230400
case 230400:
return B230400;
#endif
}
return -1;
}
void
tty_pre_select (TTY * t, fd_set * rfds, fd_set * wfds)
{
int line;
struct timeval now, dif;
if (t->hanging_up) {
gettimeofday (&now, NULL);
timersub (&now, &t->hangup_clock, &dif);
if (dif.tv_sec) {
line = TIOCM_DTR;
ioctl (t->rfd, TIOCMBIS, &line);
t->hanging_up = 0;
}
}
FD_SET (t->rfd, rfds);
}
int
tty_get_status (TTY * t, TTY_Status * s)
{
s->lines = 0;
ioctl (t->rfd, TIOCMGET, &s->lines);
if (tcgetattr (t->rfd, &s->termios))
return -1;
s->baud = speed_t_to_baud (cfgetispeed (&s->termios));
s->blocked = t->blocked;
return 0;
}
int
tty_get_baud (TTY * t)
{
struct termios tios = { 0 };
if (tcgetattr (t->rfd, &tios))
return;
return speed_t_to_baud (cfgetispeed (&tios));
}
void
tty_set_baud (TTY * t, int rate)
{
struct termios tios = { 0 };
speed_t s = baud_to_speed_t (rate);
if (s == (speed_t) - 1)
return;
if (tcgetattr (t->rfd, &tios))
return;
cfsetispeed (&tios, s);
cfsetospeed (&tios, s);
tcsetattr (t->rfd, TCSANOW, &tios);
}
void
tty_send_break (TTY * t)
{
tcsendbreak (t->wfd, 0);
}
void
tty_set_flow (TTY * t, int flow)
{
struct termios tios = { 0 };
if (tcgetattr (t->rfd, &tios))
return;
if (flow)
tios.c_cflag |= CRTSCTS;
else
tios.c_cflag &= ~CRTSCTS;
tcsetattr (t->rfd, TCSANOW, &tios);
}
void
tty_hangup (TTY * t)
{
int line;
line = TIOCM_DTR;
ioctl (t->rfd, TIOCMBIC, &line);
t->hanging_up = 1;
gettimeofday (&t->hangup_clock, NULL);
}
void
tty_length (TTY * t, int l)
{
t->displayed_length = l;
}
void
tty_winch (TTY * t, CRT_Pos size)
{
struct winsize sz = { 0 };
sz.ws_col = size.x;
sz.ws_row = size.y;
ioctl (t->wfd, TIOCSWINSZ, &sz);
}
#if 0
typedef struct {
int in_dle;
int in_errmark;
int bit_edge_frequency[8];
int errs;
}
#endif
#define DLE 0377
#define bit(p,b,z,o) \
do { \
if ((b && z)) { \
p->bitfreq[z]++; \
z = 0; \
} \
\
if ((!b && o)) \
{ \
p->bitfreq[z]++; \
o = 0; \
} \
\
if (b) \
o++; \
else \
z++; \
} \
while (0)
static void
tty_bit_analyse (Context * c, int err, int ch)
{
int d;
int zc = 0, oc = 0;
TTY_Parser *p = c->tp;
bit (p, 0, zc, oc);
for (d = 1; d < 0x100; d <<= 1) {
bit (p, ch & d, zc, oc);
}
bit (p, 1, zc, oc);
if (err) {
p->biterrs++;
gettimeofday (&p->lasterr, NULL);
}
if (p->biterrs) {
log_f (c->l,
"<tty_bit_analyse: 0%d%d%d%d%d%d%d%d1 [%d,%d,%d,%d,%d,%d,%d,%d,%d,%d]>",
ch & 0x01 ? 1 : 0, ch & 0x02 ? 1 : 0, ch & 0x04 ? 1 : 0,
ch & 0x08 ? 1 : 0, ch & 0x10 ? 1 : 0, ch & 0x20 ? 1 : 0,
ch & 0x40 ? 1 : 0, ch & 0x80 ? 1 : 0, p->bitfreq[0],
p->bitfreq[1], p->bitfreq[2], p->bitfreq[3], p->bitfreq[4],
p->bitfreq[5], p->bitfreq[6], p->bitfreq[7], p->bitfreq[8],
p->bitfreq[9]);
}
}
void
tty_parse_reset (Context * c)
{
TTY_Parser *p = c->tp;
memset (p->bitfreq, 0, sizeof (p->bitfreq));
p->biterrs = 0;
p->guessed_baud = 0;
}
void
tty_analyse (Context * c)
{
TTY_Parser *p = c->tp;
struct timeval now, dif;
int i, j, max;
if (!p->biterrs) {
p->guessed_baud = 0;
return;
}
gettimeofday (&now, NULL);
timersub (&now, &p->lasterr, &dif);
if (dif.tv_sec > 10) {
tty_parse_reset (c);
return;
}
max = -1;
j = 0;
for (i = 0; i < TTY_BITFREQ_LEN; ++i) {
if (p->bitfreq[i] > max) {
max = p->bitfreq[i];
j = i;
}
}
if (c->t)
i = tty_get_baud (c->t);
else
i = -1;
if (j == 1) {
/* Closest bit edge is one bit, so the baud rate is too low */
p->guessed_baud = -1;
} else {
if (i > 0)
p->guessed_baud = i / j;
else
p->guessed_baud = 0;
}
if (p->guessed_baud == -1) {
log_f (c->l, "<tty_analyse: %6d errors, current rate %db is too low>",
p->biterrs, i);
} else {
log_f (c->l, "<tty_analyse: %6d errors, current rate %db, suggest %db>",
p->biterrs, i, p->guessed_baud);
}
}
TTY_Parser *
tty_parser_new (void)
{
TTY_Parser *p;
p = (TTY_Parser *) xmalloc (sizeof (TTY_Parser));
memset (p, 0, sizeof (TTY_Parser));
return p;
}
int
tty_parse (Context * c, uint8_t * buf, int len)
{
TTY_Parser *p;
int err = 0;
p = c->tp;
while (len--) {
if (p->in_dle) {
p->in_dle = 0;
switch (*buf) {
case DLE:
tty_bit_analyse (c, 0, *buf);
err += utf8_parse (c, *buf);
break;
case 0:
p->in_errmark = 1;
break;
default:
log_f (c->l, "%s:%d DLE parsing error: \\377 \\%03o", __FILE__,
__LINE__, *buf);
}
} else if (p->in_errmark) {
p->in_errmark = 0;
log_f (c->l, "<tty reports error: \\377 \\000 \\%03o>",
__FILE__, __LINE__, *buf);
tty_bit_analyse (c, 1, *buf);
tty_analyse (c);
err += utf8_parse (c, *buf);
err += utf8_parse (c, SYM_CHAR_RESET);
} else if (*buf == DLE) {
p->in_dle = 1;
} else {
tty_bit_analyse (c, 0, *buf);
tty_analyse (c);
err += utf8_parse (c, *buf);
}
buf++;
}
return err;
}
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