| 1 | /* |
| 2 | * Copyright (c) 1988, 1990 Regents of the University of California. |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * 1. Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer in the |
| 12 | * documentation and/or other materials provided with the distribution. |
| 13 | * 3. All advertising materials mentioning features or use of this software |
| 14 | * must display the following acknowledgement: |
| 15 | * This product includes software developed by the University of |
| 16 | * California, Berkeley and its contributors. |
| 17 | * 4. Neither the name of the University nor the names of its contributors |
| 18 | * may be used to endorse or promote products derived from this software |
| 19 | * without specific prior written permission. |
| 20 | * |
| 21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 31 | * SUCH DAMAGE. |
| 32 | */ |
| 33 | |
| 34 | #ifndef lint |
| 35 | static char sccsid[] = "@(#)sys_bsd.c 5.2 (Berkeley) 3/1/91"; |
| 36 | #endif /* not lint */ |
| 37 | |
| 38 | /* |
| 39 | * The following routines try to encapsulate what is system dependent |
| 40 | * (at least between 4.x and dos) which is used in telnet.c. |
| 41 | */ |
| 42 | |
| 43 | |
| 44 | #include <fcntl.h> |
| 45 | #include <sys/types.h> |
| 46 | #include <sys/time.h> |
| 47 | #include <sys/socket.h> |
| 48 | #include <signal.h> |
| 49 | #include <errno.h> |
| 50 | #include <arpa/telnet.h> |
| 51 | |
| 52 | #include "ring.h" |
| 53 | |
| 54 | #include "fdset.h" |
| 55 | |
| 56 | #include "defines.h" |
| 57 | #include "externs.h" |
| 58 | #include "types.h" |
| 59 | |
| 60 | #if defined(CRAY) || (defined(USE_TERMIO) && !defined(SYSV_TERMIO)) |
| 61 | #define SIG_FUNC_RET void |
| 62 | #else |
| 63 | #define SIG_FUNC_RET int |
| 64 | #endif |
| 65 | |
| 66 | int |
| 67 | tout, /* Output file descriptor */ |
| 68 | tin, /* Input file descriptor */ |
| 69 | net; |
| 70 | |
| 71 | #ifndef USE_TERMIO |
| 72 | struct tchars otc = { 0 }, ntc = { 0 }; |
| 73 | struct ltchars oltc = { 0 }, nltc = { 0 }; |
| 74 | struct sgttyb ottyb = { 0 }, nttyb = { 0 }; |
| 75 | int olmode = 0; |
| 76 | # define cfgetispeed(ptr) (ptr)->sg_ispeed |
| 77 | # define cfgetospeed(ptr) (ptr)->sg_ospeed |
| 78 | # define old_tc ottyb |
| 79 | |
| 80 | #else /* USE_TERMIO */ |
| 81 | struct termio old_tc = { 0 }; |
| 82 | extern struct termio new_tc; |
| 83 | |
| 84 | # ifndef TCSANOW |
| 85 | # ifdef TCSETS |
| 86 | # define TCSANOW TCSETS |
| 87 | # define TCSADRAIN TCSETSW |
| 88 | # define tcgetattr(f, t) ioctl(f, TCGETS, (char *)t) |
| 89 | # else |
| 90 | # ifdef TCSETA |
| 91 | # define TCSANOW TCSETA |
| 92 | # define TCSADRAIN TCSETAW |
| 93 | # define tcgetattr(f, t) ioctl(f, TCGETA, (char *)t) |
| 94 | # else |
| 95 | # define TCSANOW TIOCSETA |
| 96 | # define TCSADRAIN TIOCSETAW |
| 97 | # define tcgetattr(f, t) ioctl(f, TIOCGETA, (char *)t) |
| 98 | # endif |
| 99 | # endif |
| 100 | # define tcsetattr(f, a, t) ioctl(f, a, (char *)t) |
| 101 | # define cfgetospeed(ptr) ((ptr)->c_cflag&CBAUD) |
| 102 | # ifdef CIBAUD |
| 103 | # define cfgetispeed(ptr) (((ptr)->c_cflag&CIBAUD) >> IBSHIFT) |
| 104 | # else |
| 105 | # define cfgetispeed(ptr) cfgetospeed(ptr) |
| 106 | # endif |
| 107 | # endif /* TCSANOW */ |
| 108 | #endif /* USE_TERMIO */ |
| 109 | |
| 110 | static fd_set ibits, obits, xbits; |
| 111 | |
| 112 | |
| 113 | void |
| 114 | init_sys() |
| 115 | { |
| 116 | tout = fileno(stdout); |
| 117 | tin = fileno(stdin); |
| 118 | FD_ZERO(&ibits); |
| 119 | FD_ZERO(&obits); |
| 120 | FD_ZERO(&xbits); |
| 121 | |
| 122 | errno = 0; |
| 123 | } |
| 124 | |
| 125 | |
| 126 | int |
| 127 | TerminalWrite(buf, n) |
| 128 | char *buf; |
| 129 | int n; |
| 130 | { |
| 131 | return write(tout, buf, n); |
| 132 | } |
| 133 | |
| 134 | int |
| 135 | TerminalRead(buf, n) |
| 136 | char *buf; |
| 137 | int n; |
| 138 | { |
| 139 | return read(tin, buf, n); |
| 140 | } |
| 141 | |
| 142 | /* |
| 143 | * |
| 144 | */ |
| 145 | |
| 146 | int |
| 147 | TerminalAutoFlush() |
| 148 | { |
| 149 | #if defined(LNOFLSH) |
| 150 | int flush; |
| 151 | |
| 152 | ioctl(0, TIOCLGET, (char *)&flush); |
| 153 | return !(flush&LNOFLSH); /* if LNOFLSH, no autoflush */ |
| 154 | #else /* LNOFLSH */ |
| 155 | return 1; |
| 156 | #endif /* LNOFLSH */ |
| 157 | } |
| 158 | |
| 159 | #ifdef KLUDGELINEMODE |
| 160 | extern int kludgelinemode; |
| 161 | #endif |
| 162 | /* |
| 163 | * TerminalSpecialChars() |
| 164 | * |
| 165 | * Look at an input character to see if it is a special character |
| 166 | * and decide what to do. |
| 167 | * |
| 168 | * Output: |
| 169 | * |
| 170 | * 0 Don't add this character. |
| 171 | * 1 Do add this character |
| 172 | */ |
| 173 | |
| 174 | int |
| 175 | TerminalSpecialChars(c) |
| 176 | int c; |
| 177 | { |
| 178 | void xmitAO(), xmitEL(), xmitEC(), intp(), sendbrk(); |
| 179 | |
| 180 | if (c == termIntChar) { |
| 181 | intp(); |
| 182 | return 0; |
| 183 | } else if (c == termQuitChar) { |
| 184 | #ifdef KLUDGELINEMODE |
| 185 | if (kludgelinemode) |
| 186 | sendbrk(); |
| 187 | else |
| 188 | #endif |
| 189 | sendabort(); |
| 190 | return 0; |
| 191 | } else if (c == termEofChar) { |
| 192 | if (my_want_state_is_will(TELOPT_LINEMODE)) { |
| 193 | sendeof(); |
| 194 | return 0; |
| 195 | } |
| 196 | return 1; |
| 197 | } else if (c == termSuspChar) { |
| 198 | sendsusp(); |
| 199 | return(0); |
| 200 | } else if (c == termFlushChar) { |
| 201 | xmitAO(); /* Transmit Abort Output */ |
| 202 | return 0; |
| 203 | } else if (!MODE_LOCAL_CHARS(globalmode)) { |
| 204 | if (c == termKillChar) { |
| 205 | xmitEL(); |
| 206 | return 0; |
| 207 | } else if (c == termEraseChar) { |
| 208 | xmitEC(); /* Transmit Erase Character */ |
| 209 | return 0; |
| 210 | } |
| 211 | } |
| 212 | return 1; |
| 213 | } |
| 214 | |
| 215 | |
| 216 | /* |
| 217 | * Flush output to the terminal |
| 218 | */ |
| 219 | |
| 220 | void |
| 221 | TerminalFlushOutput() |
| 222 | { |
| 223 | #ifdef TIOCFLUSH |
| 224 | (void) ioctl(fileno(stdout), TIOCFLUSH, (char *) 0); |
| 225 | #else |
| 226 | (void) ioctl(fileno(stdout), TCFLSH, (char *) 0); |
| 227 | #endif |
| 228 | } |
| 229 | |
| 230 | void |
| 231 | TerminalSaveState() |
| 232 | { |
| 233 | #ifndef USE_TERMIO |
| 234 | ioctl(0, TIOCGETP, (char *)&ottyb); |
| 235 | ioctl(0, TIOCGETC, (char *)&otc); |
| 236 | ioctl(0, TIOCGLTC, (char *)&oltc); |
| 237 | ioctl(0, TIOCLGET, (char *)&olmode); |
| 238 | |
| 239 | ntc = otc; |
| 240 | nltc = oltc; |
| 241 | nttyb = ottyb; |
| 242 | |
| 243 | #else /* USE_TERMIO */ |
| 244 | tcgetattr(0, &old_tc); |
| 245 | |
| 246 | new_tc = old_tc; |
| 247 | |
| 248 | #ifndef VDISCARD |
| 249 | termFlushChar = CONTROL('O'); |
| 250 | #endif |
| 251 | #ifndef VWERASE |
| 252 | termWerasChar = CONTROL('W'); |
| 253 | #endif |
| 254 | #ifndef VREPRINT |
| 255 | termRprntChar = CONTROL('R'); |
| 256 | #endif |
| 257 | #ifndef VLNEXT |
| 258 | termLiteralNextChar = CONTROL('V'); |
| 259 | #endif |
| 260 | #ifndef VSTART |
| 261 | termStartChar = CONTROL('Q'); |
| 262 | #endif |
| 263 | #ifndef VSTOP |
| 264 | termStopChar = CONTROL('S'); |
| 265 | #endif |
| 266 | #ifndef VSTATUS |
| 267 | termAytChar = CONTROL('T'); |
| 268 | #endif |
| 269 | #endif /* USE_TERMIO */ |
| 270 | } |
| 271 | |
| 272 | cc_t * |
| 273 | tcval(func) |
| 274 | register int func; |
| 275 | { |
| 276 | switch(func) { |
| 277 | case SLC_IP: return(&termIntChar); |
| 278 | case SLC_ABORT: return(&termQuitChar); |
| 279 | case SLC_EOF: return(&termEofChar); |
| 280 | case SLC_EC: return(&termEraseChar); |
| 281 | case SLC_EL: return(&termKillChar); |
| 282 | case SLC_XON: return(&termStartChar); |
| 283 | case SLC_XOFF: return(&termStopChar); |
| 284 | case SLC_FORW1: return(&termForw1Char); |
| 285 | #ifdef USE_TERMIO |
| 286 | case SLC_FORW2: return(&termForw2Char); |
| 287 | # ifdef VDISCARD |
| 288 | case SLC_AO: return(&termFlushChar); |
| 289 | # endif |
| 290 | # ifdef VSUSP |
| 291 | case SLC_SUSP: return(&termSuspChar); |
| 292 | # endif |
| 293 | # ifdef VWERASE |
| 294 | case SLC_EW: return(&termWerasChar); |
| 295 | # endif |
| 296 | # ifdef VREPRINT |
| 297 | case SLC_RP: return(&termRprntChar); |
| 298 | # endif |
| 299 | # ifdef VLNEXT |
| 300 | case SLC_LNEXT: return(&termLiteralNextChar); |
| 301 | # endif |
| 302 | # ifdef VSTATUS |
| 303 | case SLC_AYT: return(&termAytChar); |
| 304 | # endif |
| 305 | #endif |
| 306 | |
| 307 | case SLC_SYNCH: |
| 308 | case SLC_BRK: |
| 309 | case SLC_EOR: |
| 310 | default: |
| 311 | return((cc_t *)0); |
| 312 | } |
| 313 | } |
| 314 | |
| 315 | void |
| 316 | TerminalDefaultChars() |
| 317 | { |
| 318 | #ifndef USE_TERMIO |
| 319 | ntc = otc; |
| 320 | nltc = oltc; |
| 321 | nttyb.sg_kill = ottyb.sg_kill; |
| 322 | nttyb.sg_erase = ottyb.sg_erase; |
| 323 | #else /* USE_TERMIO */ |
| 324 | memcpy(new_tc.c_cc, old_tc.c_cc, sizeof(old_tc.c_cc)); |
| 325 | # ifndef VDISCARD |
| 326 | termFlushChar = CONTROL('O'); |
| 327 | # endif |
| 328 | # ifndef VWERASE |
| 329 | termWerasChar = CONTROL('W'); |
| 330 | # endif |
| 331 | # ifndef VREPRINT |
| 332 | termRprntChar = CONTROL('R'); |
| 333 | # endif |
| 334 | # ifndef VLNEXT |
| 335 | termLiteralNextChar = CONTROL('V'); |
| 336 | # endif |
| 337 | # ifndef VSTART |
| 338 | termStartChar = CONTROL('Q'); |
| 339 | # endif |
| 340 | # ifndef VSTOP |
| 341 | termStopChar = CONTROL('S'); |
| 342 | # endif |
| 343 | # ifndef VSTATUS |
| 344 | termAytChar = CONTROL('T'); |
| 345 | # endif |
| 346 | #endif /* USE_TERMIO */ |
| 347 | } |
| 348 | |
| 349 | #ifdef notdef |
| 350 | void |
| 351 | TerminalRestoreState() |
| 352 | { |
| 353 | } |
| 354 | #endif |
| 355 | |
| 356 | /* |
| 357 | * TerminalNewMode - set up terminal to a specific mode. |
| 358 | * MODE_ECHO: do local terminal echo |
| 359 | * MODE_FLOW: do local flow control |
| 360 | * MODE_TRAPSIG: do local mapping to TELNET IAC sequences |
| 361 | * MODE_EDIT: do local line editing |
| 362 | * |
| 363 | * Command mode: |
| 364 | * MODE_ECHO|MODE_EDIT|MODE_FLOW|MODE_TRAPSIG |
| 365 | * local echo |
| 366 | * local editing |
| 367 | * local xon/xoff |
| 368 | * local signal mapping |
| 369 | * |
| 370 | * Linemode: |
| 371 | * local/no editing |
| 372 | * Both Linemode and Single Character mode: |
| 373 | * local/remote echo |
| 374 | * local/no xon/xoff |
| 375 | * local/no signal mapping |
| 376 | */ |
| 377 | |
| 378 | |
| 379 | void |
| 380 | TerminalNewMode(f) |
| 381 | register int f; |
| 382 | { |
| 383 | static int prevmode = 0; |
| 384 | #ifndef USE_TERMIO |
| 385 | struct tchars tc; |
| 386 | struct ltchars ltc; |
| 387 | struct sgttyb sb; |
| 388 | int lmode; |
| 389 | #else /* USE_TERMIO */ |
| 390 | struct termio tmp_tc; |
| 391 | #endif /* USE_TERMIO */ |
| 392 | int onoff; |
| 393 | int old; |
| 394 | cc_t esc; |
| 395 | |
| 396 | globalmode = f&~MODE_FORCE; |
| 397 | if (prevmode == f) |
| 398 | return; |
| 399 | |
| 400 | /* |
| 401 | * Write any outstanding data before switching modes |
| 402 | * ttyflush() returns 0 only when there is no more data |
| 403 | * left to write out, it returns -1 if it couldn't do |
| 404 | * anything at all, otherwise it returns 1 + the number |
| 405 | * of characters left to write. |
| 406 | #ifndef USE_TERMIO |
| 407 | * We would really like ask the kernel to wait for the output |
| 408 | * to drain, like we can do with the TCSADRAIN, but we don't have |
| 409 | * that option. The only ioctl that waits for the output to |
| 410 | * drain, TIOCSETP, also flushes the input queue, which is NOT |
| 411 | * what we want (TIOCSETP is like TCSADFLUSH). |
| 412 | #endif |
| 413 | */ |
| 414 | old = ttyflush(SYNCHing|flushout); |
| 415 | if (old < 0 || old > 1) { |
| 416 | #ifdef USE_TERMIO |
| 417 | tcgetattr(tin, &tmp_tc); |
| 418 | #endif /* USE_TERMIO */ |
| 419 | do { |
| 420 | /* |
| 421 | * Wait for data to drain, then flush again. |
| 422 | */ |
| 423 | #ifdef USE_TERMIO |
| 424 | tcsetattr(tin, TCSADRAIN, &tmp_tc); |
| 425 | #endif /* USE_TERMIO */ |
| 426 | old = ttyflush(SYNCHing|flushout); |
| 427 | } while (old < 0 || old > 1); |
| 428 | } |
| 429 | |
| 430 | old = prevmode; |
| 431 | prevmode = f&~MODE_FORCE; |
| 432 | #ifndef USE_TERMIO |
| 433 | sb = nttyb; |
| 434 | tc = ntc; |
| 435 | ltc = nltc; |
| 436 | lmode = olmode; |
| 437 | #else |
| 438 | tmp_tc = new_tc; |
| 439 | #endif |
| 440 | |
| 441 | if (f&MODE_ECHO) { |
| 442 | #ifndef USE_TERMIO |
| 443 | sb.sg_flags |= ECHO; |
| 444 | #else |
| 445 | tmp_tc.c_lflag |= ECHO; |
| 446 | tmp_tc.c_oflag |= ONLCR; |
| 447 | if (crlf) |
| 448 | tmp_tc.c_iflag |= ICRNL; |
| 449 | #endif |
| 450 | } else { |
| 451 | #ifndef USE_TERMIO |
| 452 | sb.sg_flags &= ~ECHO; |
| 453 | #else |
| 454 | tmp_tc.c_lflag &= ~ECHO; |
| 455 | tmp_tc.c_oflag &= ~ONLCR; |
| 456 | # ifdef notdef |
| 457 | if (crlf) |
| 458 | tmp_tc.c_iflag &= ~ICRNL; |
| 459 | # endif |
| 460 | #endif |
| 461 | } |
| 462 | |
| 463 | if ((f&MODE_FLOW) == 0) { |
| 464 | #ifndef USE_TERMIO |
| 465 | tc.t_startc = _POSIX_VDISABLE; |
| 466 | tc.t_stopc = _POSIX_VDISABLE; |
| 467 | #else |
| 468 | tmp_tc.c_iflag &= ~(IXANY|IXOFF|IXON); |
| 469 | } else { |
| 470 | tmp_tc.c_iflag |= IXANY|IXOFF|IXON; |
| 471 | #endif |
| 472 | } |
| 473 | |
| 474 | if ((f&MODE_TRAPSIG) == 0) { |
| 475 | #ifndef USE_TERMIO |
| 476 | tc.t_intrc = _POSIX_VDISABLE; |
| 477 | tc.t_quitc = _POSIX_VDISABLE; |
| 478 | tc.t_eofc = _POSIX_VDISABLE; |
| 479 | ltc.t_suspc = _POSIX_VDISABLE; |
| 480 | ltc.t_dsuspc = _POSIX_VDISABLE; |
| 481 | #else |
| 482 | tmp_tc.c_lflag &= ~ISIG; |
| 483 | #endif |
| 484 | localchars = 0; |
| 485 | } else { |
| 486 | #ifdef USE_TERMIO |
| 487 | tmp_tc.c_lflag |= ISIG; |
| 488 | #endif |
| 489 | localchars = 1; |
| 490 | } |
| 491 | |
| 492 | if (f&MODE_EDIT) { |
| 493 | #ifndef USE_TERMIO |
| 494 | sb.sg_flags &= ~CBREAK; |
| 495 | sb.sg_flags |= CRMOD; |
| 496 | #else |
| 497 | tmp_tc.c_lflag |= ICANON; |
| 498 | #endif |
| 499 | } else { |
| 500 | #ifndef USE_TERMIO |
| 501 | sb.sg_flags |= CBREAK; |
| 502 | if (f&MODE_ECHO) |
| 503 | sb.sg_flags |= CRMOD; |
| 504 | else |
| 505 | sb.sg_flags &= ~CRMOD; |
| 506 | #else |
| 507 | tmp_tc.c_lflag &= ~ICANON; |
| 508 | tmp_tc.c_iflag &= ~ICRNL; |
| 509 | tmp_tc.c_cc[VMIN] = 1; |
| 510 | tmp_tc.c_cc[VTIME] = 0; |
| 511 | #endif |
| 512 | } |
| 513 | |
| 514 | if ((f&(MODE_EDIT|MODE_TRAPSIG)) == 0) { |
| 515 | #ifndef USE_TERMIO |
| 516 | ltc.t_lnextc = _POSIX_VDISABLE; |
| 517 | #else |
| 518 | # ifdef VLNEXT |
| 519 | tmp_tc.c_cc[VLNEXT] = (cc_t)(_POSIX_VDISABLE); |
| 520 | # endif |
| 521 | #endif |
| 522 | } |
| 523 | |
| 524 | if (f&MODE_SOFT_TAB) { |
| 525 | #ifndef USE_TERMIO |
| 526 | sb.sg_flags |= XTABS; |
| 527 | #else |
| 528 | # ifdef OXTABS |
| 529 | tmp_tc.c_oflag |= OXTABS; |
| 530 | # endif |
| 531 | # ifdef TABDLY |
| 532 | tmp_tc.c_oflag &= ~TABDLY; |
| 533 | tmp_tc.c_oflag |= TAB3; |
| 534 | # endif |
| 535 | #endif |
| 536 | } else { |
| 537 | #ifndef USE_TERMIO |
| 538 | sb.sg_flags &= ~XTABS; |
| 539 | #else |
| 540 | # ifdef OXTABS |
| 541 | tmp_tc.c_oflag &= ~OXTABS; |
| 542 | # endif |
| 543 | # ifdef TABDLY |
| 544 | tmp_tc.c_oflag &= ~TABDLY; |
| 545 | # endif |
| 546 | #endif |
| 547 | } |
| 548 | |
| 549 | if (f&MODE_LIT_ECHO) { |
| 550 | #ifndef USE_TERMIO |
| 551 | lmode &= ~LCTLECH; |
| 552 | #else |
| 553 | # ifdef ECHOCTL |
| 554 | tmp_tc.c_lflag &= ~ECHOCTL; |
| 555 | # endif |
| 556 | #endif |
| 557 | } else { |
| 558 | #ifndef USE_TERMIO |
| 559 | lmode |= LCTLECH; |
| 560 | #else |
| 561 | # ifdef ECHOCTL |
| 562 | tmp_tc.c_lflag |= ECHOCTL; |
| 563 | # endif |
| 564 | #endif |
| 565 | } |
| 566 | |
| 567 | if (f == -1) { |
| 568 | onoff = 0; |
| 569 | } else { |
| 570 | #ifndef USE_TERMIO |
| 571 | if (f & MODE_OUTBIN) |
| 572 | lmode |= LLITOUT; |
| 573 | else |
| 574 | lmode &= ~LLITOUT; |
| 575 | |
| 576 | if (f & MODE_INBIN) |
| 577 | lmode |= LPASS8; |
| 578 | else |
| 579 | lmode &= ~LPASS8; |
| 580 | #else |
| 581 | if (f & MODE_INBIN) |
| 582 | tmp_tc.c_iflag &= ~ISTRIP; |
| 583 | else |
| 584 | tmp_tc.c_iflag |= ISTRIP; |
| 585 | if (f & MODE_OUTBIN) { |
| 586 | tmp_tc.c_cflag &= ~(CSIZE|PARENB); |
| 587 | tmp_tc.c_cflag |= CS8; |
| 588 | tmp_tc.c_oflag &= ~OPOST; |
| 589 | } else { |
| 590 | tmp_tc.c_cflag &= ~(CSIZE|PARENB); |
| 591 | tmp_tc.c_cflag |= old_tc.c_cflag & (CSIZE|PARENB); |
| 592 | tmp_tc.c_oflag |= OPOST; |
| 593 | } |
| 594 | #endif |
| 595 | onoff = 1; |
| 596 | } |
| 597 | |
| 598 | if (f != -1) { |
| 599 | #ifdef SIGTSTP |
| 600 | static SIG_FUNC_RET susp(); |
| 601 | #endif /* SIGTSTP */ |
| 602 | #ifdef SIGINFO |
| 603 | static SIG_FUNC_RET ayt(); |
| 604 | #endif SIGINFO |
| 605 | |
| 606 | #ifdef SIGTSTP |
| 607 | (void) signal(SIGTSTP, susp); |
| 608 | #endif /* SIGTSTP */ |
| 609 | #ifdef SIGINFO |
| 610 | (void) signal(SIGINFO, ayt); |
| 611 | #endif SIGINFO |
| 612 | #if defined(USE_TERMIO) && defined(NOKERNINFO) |
| 613 | tmp_tc.c_lflag |= NOKERNINFO; |
| 614 | #endif |
| 615 | /* |
| 616 | * We don't want to process ^Y here. It's just another |
| 617 | * character that we'll pass on to the back end. It has |
| 618 | * to process it because it will be processed when the |
| 619 | * user attempts to read it, not when we send it. |
| 620 | */ |
| 621 | #ifndef USE_TERMIO |
| 622 | ltc.t_dsuspc = _POSIX_VDISABLE; |
| 623 | #else |
| 624 | # ifdef VDSUSP |
| 625 | tmp_tc.c_cc[VDSUSP] = (cc_t)(_POSIX_VDISABLE); |
| 626 | # endif |
| 627 | #endif |
| 628 | #ifdef USE_TERMIO |
| 629 | /* |
| 630 | * If the VEOL character is already set, then use VEOL2, |
| 631 | * otherwise use VEOL. |
| 632 | */ |
| 633 | esc = (rlogin != _POSIX_VDISABLE) ? rlogin : escape; |
| 634 | if ((tmp_tc.c_cc[VEOL] != esc) |
| 635 | # ifdef VEOL2 |
| 636 | && (tmp_tc.c_cc[VEOL2] != esc) |
| 637 | # endif |
| 638 | ) { |
| 639 | if (tmp_tc.c_cc[VEOL] == (cc_t)(_POSIX_VDISABLE)) |
| 640 | tmp_tc.c_cc[VEOL] = esc; |
| 641 | # ifdef VEOL2 |
| 642 | else if (tmp_tc.c_cc[VEOL2] == (cc_t)(_POSIX_VDISABLE)) |
| 643 | tmp_tc.c_cc[VEOL2] = esc; |
| 644 | # endif |
| 645 | } |
| 646 | #else |
| 647 | if (tc.t_brkc == (cc_t)(_POSIX_VDISABLE)) |
| 648 | tc.t_brkc = esc; |
| 649 | #endif |
| 650 | } else { |
| 651 | #ifdef SIGINFO |
| 652 | SIG_FUNC_RET ayt_status(); |
| 653 | |
| 654 | (void) signal(SIGINFO, ayt_status); |
| 655 | #endif SIGINFO |
| 656 | #ifdef SIGTSTP |
| 657 | (void) signal(SIGTSTP, SIG_DFL); |
| 658 | (void) sigsetmask(sigblock(0) & ~(1<<(SIGTSTP-1))); |
| 659 | #endif /* SIGTSTP */ |
| 660 | #ifndef USE_TERMIO |
| 661 | ltc = oltc; |
| 662 | tc = otc; |
| 663 | sb = ottyb; |
| 664 | lmode = olmode; |
| 665 | #else |
| 666 | tmp_tc = old_tc; |
| 667 | #endif |
| 668 | } |
| 669 | #ifndef USE_TERMIO |
| 670 | ioctl(tin, TIOCLSET, (char *)&lmode); |
| 671 | ioctl(tin, TIOCSLTC, (char *)<c); |
| 672 | ioctl(tin, TIOCSETC, (char *)&tc); |
| 673 | ioctl(tin, TIOCSETN, (char *)&sb); |
| 674 | #else |
| 675 | if (tcsetattr(tin, TCSADRAIN, &tmp_tc) < 0) |
| 676 | tcsetattr(tin, TCSANOW, &tmp_tc); |
| 677 | #endif |
| 678 | |
| 679 | #if (!defined(TN3270)) || ((!defined(NOT43)) || defined(PUTCHAR)) |
| 680 | ioctl(tin, FIONBIO, (char *)&onoff); |
| 681 | ioctl(tout, FIONBIO, (char *)&onoff); |
| 682 | #endif /* (!defined(TN3270)) || ((!defined(NOT43)) || defined(PUTCHAR)) */ |
| 683 | #if defined(TN3270) |
| 684 | if (noasynchtty == 0) { |
| 685 | ioctl(tin, FIOASYNC, (char *)&onoff); |
| 686 | } |
| 687 | #endif /* defined(TN3270) */ |
| 688 | |
| 689 | } |
| 690 | |
| 691 | #ifndef B19200 |
| 692 | # define B19200 B9600 |
| 693 | #endif |
| 694 | |
| 695 | #ifndef B38400 |
| 696 | # define B38400 B19200 |
| 697 | #endif |
| 698 | |
| 699 | /* |
| 700 | * This code assumes that the values B0, B50, B75... |
| 701 | * are in ascending order. They do not have to be |
| 702 | * contiguous. |
| 703 | */ |
| 704 | struct termspeeds { |
| 705 | long speed; |
| 706 | long value; |
| 707 | } termspeeds[] = { |
| 708 | { 0, B0 }, { 50, B50 }, { 75, B75 }, |
| 709 | { 110, B110 }, { 134, B134 }, { 150, B150 }, |
| 710 | { 200, B200 }, { 300, B300 }, { 600, B600 }, |
| 711 | { 1200, B1200 }, { 1800, B1800 }, { 2400, B2400 }, |
| 712 | { 4800, B4800 }, { 9600, B9600 }, { 19200, B19200 }, |
| 713 | { 38400, B38400 }, { -1, B38400 } |
| 714 | }; |
| 715 | |
| 716 | void |
| 717 | TerminalSpeeds(ispeed, ospeed) |
| 718 | long *ispeed; |
| 719 | long *ospeed; |
| 720 | { |
| 721 | register struct termspeeds *tp; |
| 722 | register long in, out; |
| 723 | |
| 724 | out = cfgetospeed(&old_tc); |
| 725 | in = cfgetispeed(&old_tc); |
| 726 | if (in == 0) |
| 727 | in = out; |
| 728 | |
| 729 | tp = termspeeds; |
| 730 | while ((tp->speed != -1) && (tp->value < in)) |
| 731 | tp++; |
| 732 | *ispeed = tp->speed; |
| 733 | |
| 734 | tp = termspeeds; |
| 735 | while ((tp->speed != -1) && (tp->value < out)) |
| 736 | tp++; |
| 737 | *ospeed = tp->speed; |
| 738 | } |
| 739 | |
| 740 | int |
| 741 | TerminalWindowSize(rows, cols) |
| 742 | long *rows, *cols; |
| 743 | { |
| 744 | #ifdef TIOCGWINSZ |
| 745 | struct winsize ws; |
| 746 | |
| 747 | if (ioctl(fileno(stdin), TIOCGWINSZ, (char *)&ws) >= 0) { |
| 748 | *rows = ws.ws_row; |
| 749 | *cols = ws.ws_col; |
| 750 | return 1; |
| 751 | } |
| 752 | #endif /* TIOCGWINSZ */ |
| 753 | return 0; |
| 754 | } |
| 755 | |
| 756 | int |
| 757 | NetClose(fd) |
| 758 | int fd; |
| 759 | { |
| 760 | return close(fd); |
| 761 | } |
| 762 | |
| 763 | |
| 764 | void |
| 765 | NetNonblockingIO(fd, onoff) |
| 766 | int fd; |
| 767 | int onoff; |
| 768 | { |
| 769 | ioctl(fd, FIONBIO, (char *)&onoff); |
| 770 | } |
| 771 | |
| 772 | #if defined(TN3270) |
| 773 | void |
| 774 | NetSigIO(fd, onoff) |
| 775 | int fd; |
| 776 | int onoff; |
| 777 | { |
| 778 | ioctl(fd, FIOASYNC, (char *)&onoff); /* hear about input */ |
| 779 | } |
| 780 | |
| 781 | void |
| 782 | NetSetPgrp(fd) |
| 783 | int fd; |
| 784 | { |
| 785 | int myPid; |
| 786 | |
| 787 | myPid = getpid(); |
| 788 | fcntl(fd, F_SETOWN, myPid); |
| 789 | } |
| 790 | #endif /*defined(TN3270)*/ |
| 791 | \f |
| 792 | /* |
| 793 | * Various signal handling routines. |
| 794 | */ |
| 795 | |
| 796 | /* ARGSUSED */ |
| 797 | static SIG_FUNC_RET |
| 798 | deadpeer(sig) |
| 799 | int sig; |
| 800 | { |
| 801 | setcommandmode(); |
| 802 | longjmp(peerdied, -1); |
| 803 | } |
| 804 | |
| 805 | /* ARGSUSED */ |
| 806 | static SIG_FUNC_RET |
| 807 | intr(sig) |
| 808 | int sig; |
| 809 | { |
| 810 | if (localchars) { |
| 811 | intp(); |
| 812 | return; |
| 813 | } |
| 814 | setcommandmode(); |
| 815 | longjmp(toplevel, -1); |
| 816 | } |
| 817 | |
| 818 | /* ARGSUSED */ |
| 819 | static SIG_FUNC_RET |
| 820 | intr2(sig) |
| 821 | int sig; |
| 822 | { |
| 823 | if (localchars) { |
| 824 | #ifdef KLUDGELINEMODE |
| 825 | if (kludgelinemode) |
| 826 | sendbrk(); |
| 827 | else |
| 828 | #endif |
| 829 | sendabort(); |
| 830 | return; |
| 831 | } |
| 832 | } |
| 833 | |
| 834 | #ifdef SIGTSTP |
| 835 | /* ARGSUSED */ |
| 836 | static SIG_FUNC_RET |
| 837 | susp(sig) |
| 838 | int sig; |
| 839 | { |
| 840 | if ((rlogin != _POSIX_VDISABLE) && rlogin_susp()) |
| 841 | return; |
| 842 | if (localchars) |
| 843 | sendsusp(); |
| 844 | } |
| 845 | #endif |
| 846 | |
| 847 | #ifdef SIGWINCH |
| 848 | /* ARGSUSED */ |
| 849 | static SIG_FUNC_RET |
| 850 | sendwin(sig) |
| 851 | int sig; |
| 852 | { |
| 853 | if (connected) { |
| 854 | sendnaws(); |
| 855 | } |
| 856 | } |
| 857 | #endif |
| 858 | |
| 859 | #ifdef SIGINFO |
| 860 | /* ARGSUSED */ |
| 861 | static SIG_FUNC_RET |
| 862 | ayt(sig) |
| 863 | int sig; |
| 864 | { |
| 865 | if (connected) |
| 866 | sendayt(); |
| 867 | else |
| 868 | ayt_status(); |
| 869 | } |
| 870 | #endif |
| 871 | |
| 872 | \f |
| 873 | void |
| 874 | sys_telnet_init() |
| 875 | { |
| 876 | (void) signal(SIGINT, intr); |
| 877 | (void) signal(SIGQUIT, intr2); |
| 878 | (void) signal(SIGPIPE, deadpeer); |
| 879 | #ifdef SIGWINCH |
| 880 | (void) signal(SIGWINCH, sendwin); |
| 881 | #endif |
| 882 | #ifdef SIGTSTP |
| 883 | (void) signal(SIGTSTP, susp); |
| 884 | #endif |
| 885 | #ifdef SIGINFO |
| 886 | (void) signal(SIGINFO, ayt); |
| 887 | #endif |
| 888 | |
| 889 | setconnmode(0); |
| 890 | |
| 891 | NetNonblockingIO(net, 1); |
| 892 | |
| 893 | #if defined(TN3270) |
| 894 | if (noasynchnet == 0) { /* DBX can't handle! */ |
| 895 | NetSigIO(net, 1); |
| 896 | NetSetPgrp(net); |
| 897 | } |
| 898 | #endif /* defined(TN3270) */ |
| 899 | |
| 900 | #if defined(SO_OOBINLINE) |
| 901 | if (SetSockOpt(net, SOL_SOCKET, SO_OOBINLINE, 1) == -1) { |
| 902 | perror("SetSockOpt"); |
| 903 | } |
| 904 | #endif /* defined(SO_OOBINLINE) */ |
| 905 | } |
| 906 | |
| 907 | /* |
| 908 | * Process rings - |
| 909 | * |
| 910 | * This routine tries to fill up/empty our various rings. |
| 911 | * |
| 912 | * The parameter specifies whether this is a poll operation, |
| 913 | * or a block-until-something-happens operation. |
| 914 | * |
| 915 | * The return value is 1 if something happened, 0 if not. |
| 916 | */ |
| 917 | |
| 918 | int |
| 919 | process_rings(netin, netout, netex, ttyin, ttyout, poll) |
| 920 | int poll; /* If 0, then block until something to do */ |
| 921 | { |
| 922 | register int c; |
| 923 | /* One wants to be a bit careful about setting returnValue |
| 924 | * to one, since a one implies we did some useful work, |
| 925 | * and therefore probably won't be called to block next |
| 926 | * time (TN3270 mode only). |
| 927 | */ |
| 928 | int returnValue = 0; |
| 929 | static struct timeval TimeValue = { 0 }; |
| 930 | |
| 931 | if (netout) { |
| 932 | FD_SET(net, &obits); |
| 933 | } |
| 934 | if (ttyout) { |
| 935 | FD_SET(tout, &obits); |
| 936 | } |
| 937 | #if defined(TN3270) |
| 938 | if (ttyin) { |
| 939 | FD_SET(tin, &ibits); |
| 940 | } |
| 941 | #else /* defined(TN3270) */ |
| 942 | if (ttyin) { |
| 943 | FD_SET(tin, &ibits); |
| 944 | } |
| 945 | #endif /* defined(TN3270) */ |
| 946 | #if defined(TN3270) |
| 947 | if (netin) { |
| 948 | FD_SET(net, &ibits); |
| 949 | } |
| 950 | # else /* !defined(TN3270) */ |
| 951 | if (netin) { |
| 952 | FD_SET(net, &ibits); |
| 953 | } |
| 954 | # endif /* !defined(TN3270) */ |
| 955 | if (netex) { |
| 956 | FD_SET(net, &xbits); |
| 957 | } |
| 958 | if ((c = select(16, &ibits, &obits, &xbits, |
| 959 | (poll == 0)? (struct timeval *)0 : &TimeValue)) < 0) { |
| 960 | if (c == -1) { |
| 961 | /* |
| 962 | * we can get EINTR if we are in line mode, |
| 963 | * and the user does an escape (TSTP), or |
| 964 | * some other signal generator. |
| 965 | */ |
| 966 | if (errno == EINTR) { |
| 967 | return 0; |
| 968 | } |
| 969 | # if defined(TN3270) |
| 970 | /* |
| 971 | * we can get EBADF if we were in transparent |
| 972 | * mode, and the transcom process died. |
| 973 | */ |
| 974 | if (errno == EBADF) { |
| 975 | /* |
| 976 | * zero the bits (even though kernel does it) |
| 977 | * to make sure we are selecting on the right |
| 978 | * ones. |
| 979 | */ |
| 980 | FD_ZERO(&ibits); |
| 981 | FD_ZERO(&obits); |
| 982 | FD_ZERO(&xbits); |
| 983 | return 0; |
| 984 | } |
| 985 | # endif /* defined(TN3270) */ |
| 986 | /* I don't like this, does it ever happen? */ |
| 987 | printf("sleep(5) from telnet, after select\r\n"); |
| 988 | sleep(5); |
| 989 | } |
| 990 | return 0; |
| 991 | } |
| 992 | |
| 993 | /* |
| 994 | * Any urgent data? |
| 995 | */ |
| 996 | if (FD_ISSET(net, &xbits)) { |
| 997 | FD_CLR(net, &xbits); |
| 998 | SYNCHing = 1; |
| 999 | (void) ttyflush(1); /* flush already enqueued data */ |
| 1000 | } |
| 1001 | |
| 1002 | /* |
| 1003 | * Something to read from the network... |
| 1004 | */ |
| 1005 | if (FD_ISSET(net, &ibits)) { |
| 1006 | int canread; |
| 1007 | |
| 1008 | FD_CLR(net, &ibits); |
| 1009 | canread = ring_empty_consecutive(&netiring); |
| 1010 | #if !defined(SO_OOBINLINE) |
| 1011 | /* |
| 1012 | * In 4.2 (and some early 4.3) systems, the |
| 1013 | * OOB indication and data handling in the kernel |
| 1014 | * is such that if two separate TCP Urgent requests |
| 1015 | * come in, one byte of TCP data will be overlaid. |
| 1016 | * This is fatal for Telnet, but we try to live |
| 1017 | * with it. |
| 1018 | * |
| 1019 | * In addition, in 4.2 (and...), a special protocol |
| 1020 | * is needed to pick up the TCP Urgent data in |
| 1021 | * the correct sequence. |
| 1022 | * |
| 1023 | * What we do is: if we think we are in urgent |
| 1024 | * mode, we look to see if we are "at the mark". |
| 1025 | * If we are, we do an OOB receive. If we run |
| 1026 | * this twice, we will do the OOB receive twice, |
| 1027 | * but the second will fail, since the second |
| 1028 | * time we were "at the mark", but there wasn't |
| 1029 | * any data there (the kernel doesn't reset |
| 1030 | * "at the mark" until we do a normal read). |
| 1031 | * Once we've read the OOB data, we go ahead |
| 1032 | * and do normal reads. |
| 1033 | * |
| 1034 | * There is also another problem, which is that |
| 1035 | * since the OOB byte we read doesn't put us |
| 1036 | * out of OOB state, and since that byte is most |
| 1037 | * likely the TELNET DM (data mark), we would |
| 1038 | * stay in the TELNET SYNCH (SYNCHing) state. |
| 1039 | * So, clocks to the rescue. If we've "just" |
| 1040 | * received a DM, then we test for the |
| 1041 | * presence of OOB data when the receive OOB |
| 1042 | * fails (and AFTER we did the normal mode read |
| 1043 | * to clear "at the mark"). |
| 1044 | */ |
| 1045 | if (SYNCHing) { |
| 1046 | int atmark; |
| 1047 | static int bogus_oob = 0, first = 1; |
| 1048 | |
| 1049 | ioctl(net, SIOCATMARK, (char *)&atmark); |
| 1050 | if (atmark) { |
| 1051 | c = recv(net, netiring.supply, canread, MSG_OOB); |
| 1052 | if ((c == -1) && (errno == EINVAL)) { |
| 1053 | c = recv(net, netiring.supply, canread, 0); |
| 1054 | if (clocks.didnetreceive < clocks.gotDM) { |
| 1055 | SYNCHing = stilloob(net); |
| 1056 | } |
| 1057 | } else if (first && c > 0) { |
| 1058 | /* |
| 1059 | * Bogosity check. Systems based on 4.2BSD |
| 1060 | * do not return an error if you do a second |
| 1061 | * recv(MSG_OOB). So, we do one. If it |
| 1062 | * succeeds and returns exactly the same |
| 1063 | * data, then assume that we are running |
| 1064 | * on a broken system and set the bogus_oob |
| 1065 | * flag. (If the data was different, then |
| 1066 | * we probably got some valid new data, so |
| 1067 | * increment the count...) |
| 1068 | */ |
| 1069 | int i; |
| 1070 | i = recv(net, netiring.supply + c, canread - c, MSG_OOB); |
| 1071 | if (i == c && |
| 1072 | bcmp(netiring.supply, netiring.supply + c, i) == 0) { |
| 1073 | bogus_oob = 1; |
| 1074 | first = 0; |
| 1075 | } else if (i < 0) { |
| 1076 | bogus_oob = 0; |
| 1077 | first = 0; |
| 1078 | } else |
| 1079 | c += i; |
| 1080 | } |
| 1081 | if (bogus_oob && c > 0) { |
| 1082 | int i; |
| 1083 | /* |
| 1084 | * Bogosity. We have to do the read |
| 1085 | * to clear the atmark to get out of |
| 1086 | * an infinate loop. |
| 1087 | */ |
| 1088 | i = read(net, netiring.supply + c, canread - c); |
| 1089 | if (i > 0) |
| 1090 | c += i; |
| 1091 | } |
| 1092 | } else { |
| 1093 | c = recv(net, netiring.supply, canread, 0); |
| 1094 | } |
| 1095 | } else { |
| 1096 | c = recv(net, netiring.supply, canread, 0); |
| 1097 | } |
| 1098 | settimer(didnetreceive); |
| 1099 | #else /* !defined(SO_OOBINLINE) */ |
| 1100 | c = recv(net, netiring.supply, canread, 0); |
| 1101 | #endif /* !defined(SO_OOBINLINE) */ |
| 1102 | if (c < 0 && errno == EWOULDBLOCK) { |
| 1103 | c = 0; |
| 1104 | } else if (c <= 0) { |
| 1105 | return -1; |
| 1106 | } |
| 1107 | if (netdata) { |
| 1108 | Dump('<', netiring.supply, c); |
| 1109 | } |
| 1110 | if (c) |
| 1111 | ring_supplied(&netiring, c); |
| 1112 | returnValue = 1; |
| 1113 | } |
| 1114 | |
| 1115 | /* |
| 1116 | * Something to read from the tty... |
| 1117 | */ |
| 1118 | if (FD_ISSET(tin, &ibits)) { |
| 1119 | FD_CLR(tin, &ibits); |
| 1120 | c = TerminalRead(ttyiring.supply, ring_empty_consecutive(&ttyiring)); |
| 1121 | if (c < 0 && errno == EWOULDBLOCK) { |
| 1122 | c = 0; |
| 1123 | } else { |
| 1124 | /* EOF detection for line mode!!!! */ |
| 1125 | if ((c == 0) && MODE_LOCAL_CHARS(globalmode) && isatty(tin)) { |
| 1126 | /* must be an EOF... */ |
| 1127 | *ttyiring.supply = termEofChar; |
| 1128 | c = 1; |
| 1129 | } |
| 1130 | if (c <= 0) { |
| 1131 | return -1; |
| 1132 | } |
| 1133 | if (termdata) { |
| 1134 | Dump('<', ttyiring.supply, c); |
| 1135 | } |
| 1136 | ring_supplied(&ttyiring, c); |
| 1137 | } |
| 1138 | returnValue = 1; /* did something useful */ |
| 1139 | } |
| 1140 | |
| 1141 | if (FD_ISSET(net, &obits)) { |
| 1142 | FD_CLR(net, &obits); |
| 1143 | returnValue |= netflush(); |
| 1144 | } |
| 1145 | if (FD_ISSET(tout, &obits)) { |
| 1146 | FD_CLR(tout, &obits); |
| 1147 | returnValue |= (ttyflush(SYNCHing|flushout) > 0); |
| 1148 | } |
| 1149 | |
| 1150 | return returnValue; |
| 1151 | } |