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#ident "$Id: do_chat.c,v 4.2 2003/10/05 11:58:57 gert Exp $ Copyright (c) Gert Doering"
/* do_chat.c
*
* This module handles all the non-fax talk with the modem
*/
#include <stdio.h>
#include "syslibs.h"
#include <unistd.h>
#include <signal.h>
#include <string.h>
#ifndef sunos4
#include <sys/ioctl.h>
#endif
#ifndef EINTR
#include <errno.h>
#endif
#include "mgetty.h"
#include "policy.h"
#include "tio.h"
boolean chat_has_timeout;
static RETSIGTYPE chat_timeout(SIG_HDLR_ARGS)
{
chat_has_timeout = TRUE;
}
extern boolean virtual_ring;
/* send one string to "fd", honouring \c, \d and \\ */
int do_chat_send _P2( (fd, p), int fd, char * p )
{
boolean nocr = FALSE; /* do not set CR/LF (\c) */
/* before sending, maybe we have to pause a little */
#ifdef DO_CHAT_SEND_DELAY
delay(DO_CHAT_SEND_DELAY);
#endif
lprintf( L_MESG, "send: " );
while ( *p != 0 )
{
if ( *p == '\\' ) /* special stuff */
{
switch ( *(++p) )
{
case 'd': lputs( L_MESG, "\\d"); delay(500); break;
case 'c': nocr = TRUE; break;
default:
write( fd, p, 1 );
lputc( L_MESG, *p );
}
}
else
{
if ( write( fd, p, 1 ) != 1 )
{
lprintf( L_ERROR, "do_chat: can't write to modem!" );
return ERROR;
}
lputc( L_MESG, *p );
}
p++;
}
if ( ! nocr )
{
write( fd, MODEM_CMD_SUFFIX, sizeof(MODEM_CMD_SUFFIX)-1 );
p = MODEM_CMD_SUFFIX;
while ( *p ) lputc( L_MESG, *(p++) );
}
return NOERROR;
}
int do_chat _P6((fd, expect_send, actions, action, chat_timeout_time,
timeout_first ),
int fd, char * expect_send[],
chat_action_t actions[], action_t * action,
int chat_timeout_time, boolean timeout_first )
{
#define BUFFERSIZE 500
char buffer[BUFFERSIZE];
int i,cnt;
int retcode = SUCCESS;
int str;
int h;
TIO tio, save_tio;
#define LSIZE 100
static char lbuf[LSIZE];
static char *lptr = lbuf;
tio_get( fd, &tio );
save_tio = tio;
tio_mode_raw( &tio );
tio_set( fd, &tio );
signal( SIGALRM, chat_timeout );
/* default "action" is timeout */
if ( actions != NULL && action != NULL ) *action = A_TIMOUT;
str=0;
while ( expect_send[str] != NULL )
{
/* expect a string (expect_send[str] or abort[]) */
i = 0;
if ( strlen( expect_send[str] ) != 0 )
{
lprintf( L_MESG, "waiting for ``%s''", expect_send[str] );
lprintf( L_NOISE, "got: " );
chat_has_timeout = FALSE;
/* set alarm timer. for the first string, the timer is only
set if the flag "timeout_first" is true */
if ( str != 0 || timeout_first )
alarm( chat_timeout_time );
else
alarm( 0 );
do
{
if ( virtual_ring &&
strncmp( expect_send[str], "RING", 4 ) == 0 )
{
lputs( L_MESG, " ``found''" );
break;
}
cnt = read( fd, &buffer[i], 1 );
if ( cnt < 0 )
{
if ( errno == EINTR ) cnt = 0; /* signal */
else
{ /* unsp. error */
lprintf( L_ERROR, "do_chat: error in read()");
retcode = FAIL;
break; /* -> abort */
}
}
if ( chat_has_timeout ) /* timeout */
{
lprintf( L_WARN, "timeout in chat script, waiting for `%s'", expect_send[str] );
retcode = FAIL;
break;
}
if ( cnt > 0 )
{
lputc( L_NOISE, buffer[i] );
/* build full lines, feed them to caller-id / connect
* string parsing routine in cnd.c
*/
if ( buffer[i] == '\r' || buffer[i] == '\n' ||
(lptr >= lbuf+LSIZE-3) )
{
*lptr = '\0';
if (lbuf[0])
cndfind(lbuf);
lptr = lbuf;
}
else
*lptr++ = buffer[i];
}
i += cnt;
if ( i>BUFFERSIZE-5 ) /* buffer full -> junk oldest stuff*/
{
memcpy( &buffer[0], &buffer[BUFFERSIZE/2], i-BUFFERSIZE/2+1 );
i-=BUFFERSIZE/2;
}
/* look for the "expect"-string */
cnt = strlen( expect_send[str] );
if ( i >= cnt &&
memcmp( &buffer[i-cnt], expect_send[str], cnt ) == 0 )
{
lputs( L_MESG, " ** found **" );
break;
}
/* look for one of the "abort"-strings */
if ( actions != NULL )
for ( h=0; actions[h].expect != NULL; h ++ )
{
cnt = strlen( actions[h].expect );
if ( i>=cnt &&
memcmp( &buffer[i-cnt], actions[h].expect, cnt ) == 0 )
{
lprintf( L_MESG,"found action string: ``%s''",
actions[h].expect );
*action = actions[h].action;
retcode = FAIL;
break;
}
}
}
while ( i<BUFFERSIZE && retcode != FAIL );
/* disable timeout alarm clock */
alarm(0);
/* found abort string or timeout? */
if ( retcode == FAIL ) break;
} /* end if (strlen(expect_send[str] != 0) */
str++;
/* end of list? */
if ( expect_send[str] == NULL ) break;
/* send a string, translate (a few) esc-sequences */
do_chat_send(fd, expect_send[str++] );
} /* end while ( expect_send[str] != NULL ) */
/* reset terminal settings */
tio_set( fd, &save_tio );
return retcode;
}
/* clean_line()
*
* wait for the line "fd" to be silent for "waittime" tenths of a second
* if more than 500 bytes are read, stop logging them. We don't want to
* have the log files fill up all of the hard disk.
*/
int clean_line _P2 ((fd, waittime), int fd, int waittime )
{
char buffer[2];
int bytes = 0; /* bytes read */
#if defined(MEIBE) || defined(NEXTSGTTY) || defined(BROKEN_VTIME)
/* on some systems, the VMIN/VTIME mechanism is obviously totally
* broken. So, use a select()/flush queue loop instead.
*/
lprintf( L_NOISE, "waiting for line to clear (select/%d ms), read: ", waittime * 100 );
while( wait_for_input( fd, waittime * 100 ) &&
read( fd, buffer, 1 ) > 0 &&
bytes < 10000 )
{
if ( ++bytes < 500 ) lputc( L_NOISE, buffer[0] );
}
#else
TIO tio, save_tio;
lprintf( L_NOISE, "waiting for line to clear (VTIME=%d), read: ", waittime);
/* set terminal timeout to "waittime" tenth of a second */
tio_get( fd, &tio );
save_tio = tio; /*!! FIXME - sgtty?! */
tio.c_lflag &= ~ICANON;
tio.c_cc[VMIN] = 0;
tio.c_cc[VTIME] = waittime;
tio_set( fd, &tio );
/* read everything that comes from modem until a timeout occurs */
while ( read( fd, buffer, 1 ) > 0 &&
bytes < 10000 )
{
if ( ++bytes < 500 ) lputc( L_NOISE, buffer[0] );
}
/* reset terminal settings */
tio_set( fd, &save_tio );
#endif
if ( bytes > 500 )
lprintf( L_WARN, "clean_line: only 500 of %d bytes logged", bytes );
if ( bytes >= 10000 )
{
extern char * Device;
lprintf( L_FATAL, "clean_line: got too much junk (dev=%s).", Device );
}
return 0;
}
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