1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443
|
#ident "$Id: faxsend.c,v 4.9 2007/06/15 06:44:58 gert Exp $ Copyright (c) 1994 Gert Doering"
/* faxsend.c
*
* Send single fax pages using a class 2 or class 2.0 faxmodem.
* Called by faxrec.c (poll server) and sendfax.c (sending faxes).
*
* Depends on "modem_type" being set to Mt_class2_0 for 2.0 support.
*
* Eventually add headers to each page.
*
* The code is still quite rough, but it works.
*
* $Log: faxsend.c,v $
* Revision 4.9 2007/06/15 06:44:58 gert
* add CVS Log tag
*
*/
#include <stdio.h>
#include <strings.h>
#include <fcntl.h>
#include <unistd.h>
#include "syslibs.h"
#ifndef sunos4
#include <sys/ioctl.h>
#endif
#include <signal.h>
#include "mgetty.h"
#include "tio.h"
#include "policy.h"
#include "fax_lib.h"
static boolean fax_sendpg_timeout = FALSE;
static RETSIGTYPE fax_send_timeout(SIG_HDLR_ARGS)
{
signal( SIGALRM, fax_send_timeout ); /* reactivate handler */
lprintf( L_WARN, "fax_send: timeout" );
fax_sendpg_timeout = TRUE;
}
/* DLE ETX: send at end of all fax data to terminate page */
static char fax_end_of_page[] = { DLE, ETX };
static void fax_send_panic_exit _P1( (fd), int fd )
{
lprintf( L_FATAL, "PANIC: timeout sending fax page data, trying force modem reset\n" );
/* by all means, reset modem */
/* heavily use alarm(), to make sure nothing blocks */
/* flush output queue */
alarm( 5 ); tio_flush_queue( fd, TIO_Q_OUT );
/* restart possibly suspended output */
alarm( 5 ); tio_flow( fd, TRUE );
/* tell modem that the page is finished. Try twice */
alarm( 5 ); write( fd, fax_end_of_page, sizeof( fax_end_of_page ) );
alarm( 5 ); write( fd, fax_end_of_page, sizeof( fax_end_of_page ) );
/* Hang up. Various methods */
alarm( 5 ); write( fd, "AT+FK\r\n", 7 );
alarm( 5 ); write( fd, "ATH0\r\n", 6 );
/* Now, try to reset it by lowering DTR */
alarm( 10 );
tio_toggle_dtr( fd, 500 );
delay(500);
tio_toggle_dtr( fd, 500 );
delay(500);
/* try again to hang up + reset it */
alarm( 5 ); write( fd, "ATH0Z\r\n", 7 );
delay(500);
/* if the modem is *still* off-hook, there's nothing we can do. */
/* Hope that mgetty will be able to reinitialize it */
alarm( 0 );
rmlocks();
exit(15);
}
/* fax_send_page - send one complete fax-G3-file to the modem
*
* modem has to be in sync, waiting for at+fdt
* page punctuation is transmitted according to "ppm"
* number of bytes transmitted is added to "*bytes_sent" (for statistics)
*/
int fax_send_page _P5( (g3_file, bytes_sent, tio, ppm, fd),
char * g3_file, int * bytes_sent, TIO * tio,
Post_page_messages ppm, int fd )
{
int g3fd;
char ch;
char buf[256]; /* read chunk */
char wbuf[ sizeof(buf) * 2 ]; /* worst case: size doubles */
int w_total = 0; /* total bytes written */
int rc; /* return code */
#ifdef CLASS1
if ( modem_type == Mt_class1 || modem_type == Mt_class1_0 )
return fax1_send_page( g3_file, bytes_sent, tio, ppm, fd );
#endif
lprintf( L_NOISE, "fax_send_page(\"%s\") started...", g3_file );
/* disable software output flow control! It would eat the XON otherwise! */
tio_set_flow_control( fd, tio, (FAXSEND_FLOW) & FLOW_HARD );
tio_set( fd, tio );
/* tell modem that we're ready to send - modem will answer
* with a couple of "+F..." messages and finally CONNECT and XON
*/
if ( fax_command( "AT+FDT", "CONNECT", fd ) == ERROR ||
fax_hangup != 0 )
{
lprintf( L_WARN, "AT+FDT -> some error (%d), abort fax send!",
fax_hangup_code );
return ERROR;
}
/* alarm handler */
signal( SIGALRM, fax_send_timeout );
/* when modem is ready to receive data, it will send us an XON
* (20 seconds timeout)
*
* Not all issues of the class 2 draft require this Xon, and, further,
* the class 2.0 and 2.1 standard do *not* have it, so it's optional.
*/
if ( modem_type == Mt_class2 &&
( modem_quirks & MQ_NO_XON ) == 0 )
{
lprintf( L_NOISE, "waiting for XON, got:" );
alarm( 20 );
do
{
if ( mdm_read_byte( fd, &ch ) != 1 )
{
lprintf( L_ERROR, "timeout waiting for XON" );
fprintf( stderr, "error waiting for XON!\n" );
close( fd );
exit(11); /*! FIXME! should be done farther up */
}
lputc( L_NOISE, ch );
}
while ( ch != XON );
alarm(0);
} /* end if ( mt == class 2 ) */
/* Now enable software flow control, if desired, we've got the Xon
*/
tio_set_flow_control( fd, tio, (FAXSEND_FLOW) & (FLOW_HARD|FLOW_XON_OUT));
tio_set( fd, tio );
/* send one page */
lprintf( L_MESG, "sending %s...", g3_file );
g3fd = open( g3_file, O_RDONLY );
if ( g3fd == -1 )
{
lprintf( L_ERROR, "cannot open %s", g3_file );
lprintf( L_WARN, "have to send empty page instead" );
}
else
{
int r, i, w;
int w_refresh = 0;
boolean first = TRUE;
/* timing at start of page is a bit critical - some modems can't
* get this reliably right, so we have the option to send a few ms
* of 0-bytes, before the 001 EOL, thus relaxing the timing a bit
*/
if ( modem_quirks & MQ_NEED_SP_PAD )
{
char nbuf[100];
lprintf( L_MESG, "send %d 0-bytes (pad before first EOL)...", sizeof(nbuf) );
bzero( nbuf, sizeof(nbuf) );
write( fd, nbuf, sizeof(nbuf) );
}
alarm( 40 ); /* timeout if we get stuck in flow control */
while ( ( r = read( g3fd, buf, 64 ) ) > 0 )
{
/* refresh alarm counter every 1000 bytes */
if ( w_refresh > 1000 )
{
w_refresh -= 1000;
alarm( 30 );
}
i = 0;
/* skip over GhostScript / digifaxhigh header */
if ( first )
{
first = FALSE;
if ( r >= 64 && strcmp( buf+1,
"PC Research, Inc" ) == 0 )
{
lprintf( L_MESG, "skipping over GhostScript header" );
i = 64;
/* for dfax files, we can check if the resolutions match
*/
if ( ( fax_par_d.vr != 0 ) != ( buf[29] != 0 ) )
{
fprintf( stderr, "WARNING: sending in %s mode, fax data is %s mode\n",
fax_par_d.vr? "fine" : "normal",
buf[29] ? "fine" : "normal" );
lprintf( L_WARN, "resolution mismatch" );
}
}
else
/* it's incredible how stupid users are - check for */
/* "tiffg3" files and issue a warning if the file is */
/* suspect */
if ( r >= 2 && ( ( buf[0] == 0x49 && buf[1] == 0x49 ) ||
( buf[0] == 0x4d && buf[1] == 0x4d ) ) )
{
lprintf( L_WARN, "file may be 'tiffg3' - TIFF is *not* a valid input format" );
fprintf( stderr, "WARNING: file may be 'tiffg3' - TIFF file format is *not* supported!\n" );
fprintf( stderr, " Thus, fax transmission will most propably fail\n" );
}
else
if ( r < 10 || buf[0] != 0 )
{
lprintf( L_WARN, "file looks 'suspicious', buf=%02x %02x %02x %02x...", buf[0] &0xff, buf[1] &0xff, buf[2] &0xff, buf[3] &0xff );
fprintf( stderr, "WARNING: are you sure that this is a G3 fax file? Doesn't seem to be...\n" );
}
}
/* escape DLE characters. If necessary (+FBO=0), swap bits */
for ( w = 0; i < r; i++ )
{
wbuf[ w ] = fax_send_swaptable[ (unsigned char) buf[i] ];
if ( wbuf[ w++ ] == DLE ) wbuf[ w++ ] = DLE;
}
lprintf( L_JUNK, "read %d, write %d", r, w );
if ( write( fd, wbuf, w ) != w )
{
lprintf( L_ERROR, "could not write all %d bytes", w );
}
/* check for timeout */
if ( fax_sendpg_timeout )
{
fax_send_panic_exit( fd );
}
w_total += w;
w_refresh += w;
/* look if there's something to read
*
* normally there shouldn't be anything, but I have
* seen very old ZyXEL releases sending junk and then
* failing completely... so this may help when debugging
*
* Also, if you don't use FLOW_SOFT for sendfax, and
* your modem insists on xon/xoff flow control, you'll
* see these characters [0x11/0x13] here.
*/
if ( check_for_input( fd ) )
{
lprintf( L_NOISE, "input: got " );
do
{
/* intentionally don't use mdm_read_byte here */
if ( read( fd, &ch, 1 ) != 1 )
{
lprintf( L_ERROR, "read failed" );
break;
}
else
lputc( L_NOISE, ch );
}
while ( check_for_input( fd ) );
}
} /* end while (more g3 data to read) */
close(g3fd);
} /* end if (open file succeeded) */
lprintf( L_MESG, "page complete, %d bytes sent", w_total );
if ( bytes_sent != NULL )
*bytes_sent += w_total;
/* send end-of-page characters and post-page-message */
rc = fax_send_ppm( fd, tio, ppm );
alarm(0);
return rc;
}
/* send end-of-page code, set fax_page_transmit_status
*
* class 2 : send <DLE> <ETX>, then send AT+FET=... according to "type"
* class 2.0: send <DLE>{<mps>|<eop>|<eom>}, then send AT+FPS?
*/
int fax_send_ppm _P3( (fd, tio, ppm),
int fd, TIO * tio, Post_page_messages ppm )
{
int rc;
/* set alarm clock to a time long enough to handle *very* slow links
* on modems with *very* large buffers (2400 / ZyXEL...)
*/
alarm( FAX_RESPONSE_TIMEOUT );
if ( modem_type == Mt_class2_0 )
{
/* in class 2.0, end-of-page *and* page punctuation are
* transmitted in one. The modem will return OK or ERROR,
* depending on the remote page transmit status
*/
/* EIA 592, 8.3.3.7 */
char ppm_char, ppm_buf[2], *ppm_r;
switch( ppm )
{
case pp_mps: /* another page next */
ppm_char = 0x2c; break;
case pp_eom: /* last page, another document next */
ppm_char = 0x3b; break;
case pp_eop: /* no more pages or documents */
/* stop being sensitive to DCD drops */
#ifdef sun
/* On SUNs, HW handshake has to be off while carrier is low */
/* -> to avoid underruns, drain buffers first (Nils Jonsson) */
tio_drain_output( fd );
tio_set_flow_control(fd, tio, (FAXSEND_FLOW) & FLOW_XON_OUT);
#endif
tio_carrier( tio, FALSE );
tio_set( fd, tio );
ppm_char = 0x2e; break;
default:
lprintf( L_WARN, "ppm type %d not implemented", ppm );
return ERROR;
}
lprintf( L_MESG, "sending DLE '" );
lputc( L_MESG, ppm_char ); lputc( L_MESG, '\'' );
ppm_buf[0] = DLE; ppm_buf[1] = ppm_char;
if ( write( fd, ppm_buf, 2 ) != 2 )
{
lprintf( L_ERROR, "cannot write PPM" );
return ERROR;
}
/* FIXME: I think this should be done with fax_wait_for()! */
do
{
ppm_r = mdm_get_line( fd );
if ( ppm_r == NULL ) return ERROR;
/* hangup code. See fax_wait_for() for comments */
if ( strncmp( ppm_r, "+FHS:", 5 ) == 0 )
{
fax_hangup = 1;
signal( SIGHUP, SIG_IGN );
sscanf( &ppm_r[5], "%d", &fax_hangup_code );
lprintf( L_MESG, "connection hangup: '%s'", ppm_r );
lprintf( L_NOISE,"(%s)", fax_strerror( fax_hangup_code ));
}
}
while ( strcmp( ppm_r, "OK" ) != 0 &&
strcmp( ppm_r, "ERROR" ) != 0 );
lprintf( L_MESG, "got response: '%s'", ppm_r );
/* fax page status is encoded here! */
/* FIXME: query page tx status from modem */
fax_page_tx_status = ( strcmp( ppm_r, "OK" ) == 0 ) ? 1: 2;
/* FIXME: this way? */
/* fax_command( "AT+FPS?", "OK", fd ); */
return NOERROR;
}
else
{
/* transmit end of page (<DLE><ETX> -> OK) */
lprintf( L_MESG, "sending DLE ETX..." );
write( fd, fax_end_of_page, sizeof( fax_end_of_page ));
if ( fax_wait_for( "OK", fd ) == ERROR ) return ERROR;
/* transmit page punctuation */
switch ( ppm )
{
case pp_mps: /* another page next */
rc = fax_command( "AT+FET=0", "OK", fd );
break;
case pp_eom: /* last page, another document next */
rc = fax_command( "AT+FET=1", "OK", fd );
break;
case pp_eop: /* no more pages or documents, over & out */
/* take care of modems pulling DCD low before the final
* result code has reached the host
*/
tio_carrier( tio, FALSE );
#ifdef sun
/* HW handshake has to be off while carrier is low */
tio_set_flow_control(fd, tio, (FAXSEND_FLOW) & FLOW_XON_OUT);
#endif
tio_set( fd, tio );
rc = fax_command( "AT+FET=2", "OK", fd );
break;
default: /* pri-xxx codes */
lprintf( L_WARN, "ppm type %d not implemented", ppm );
rc = ERROR;
}
return rc;
} /* end if ( ! modem == 2.0 ) */
}
|