utility.c revision 1.2
1 /* 2 * Copyright (c) 1989 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[] = "from: @(#)utility.c 5.8 (Berkeley) 3/22/91";*/ 36 static char rcsid[] = "$Id: utility.c,v 1.2 1993/08/01 18:29:02 mycroft Exp $"; 37 #endif /* not lint */ 38 39 #define PRINTOPTIONS 40 #include "telnetd.h" 41 42 /* 43 * utility functions performing io related tasks 44 */ 45 46 /* 47 * ttloop 48 * 49 * A small subroutine to flush the network output buffer, get some data 50 * from the network, and pass it through the telnet state machine. We 51 * also flush the pty input buffer (by dropping its data) if it becomes 52 * too full. 53 */ 54 55 void 56 ttloop() 57 { 58 void netflush(); 59 60 DIAG(TD_REPORT, {sprintf(nfrontp, "td: ttloop\r\n"); 61 nfrontp += strlen(nfrontp);}); 62 if (nfrontp-nbackp) { 63 netflush(); 64 } 65 ncc = read(net, netibuf, sizeof netibuf); 66 if (ncc < 0) { 67 syslog(LOG_INFO, "ttloop: read: %m\n"); 68 exit(1); 69 } else if (ncc == 0) { 70 syslog(LOG_INFO, "ttloop: peer died: %m\n"); 71 exit(1); 72 } 73 DIAG(TD_REPORT, {sprintf(nfrontp, "td: ttloop read %d chars\r\n", ncc); 74 nfrontp += strlen(nfrontp);}); 75 netip = netibuf; 76 telrcv(); /* state machine */ 77 if (ncc > 0) { 78 pfrontp = pbackp = ptyobuf; 79 telrcv(); 80 } 81 } /* end of ttloop */ 82 83 /* 84 * Check a descriptor to see if out of band data exists on it. 85 */ 86 int 87 stilloob(s) 88 int s; /* socket number */ 89 { 90 static struct timeval timeout = { 0 }; 91 fd_set excepts; 92 int value; 93 94 do { 95 FD_ZERO(&excepts); 96 FD_SET(s, &excepts); 97 value = select(s+1, (fd_set *)0, (fd_set *)0, &excepts, &timeout); 98 } while ((value == -1) && (errno == EINTR)); 99 100 if (value < 0) { 101 fatalperror(pty, "select"); 102 } 103 if (FD_ISSET(s, &excepts)) { 104 return 1; 105 } else { 106 return 0; 107 } 108 } 109 110 void 111 ptyflush() 112 { 113 int n; 114 115 if ((n = pfrontp - pbackp) > 0) { 116 DIAG((TD_REPORT | TD_PTYDATA), 117 { sprintf(nfrontp, "td: ptyflush %d chars\r\n", n); 118 nfrontp += strlen(nfrontp); }); 119 DIAG(TD_PTYDATA, printdata("pd", pbackp, n)); 120 n = write(pty, pbackp, n); 121 } 122 if (n < 0) { 123 if (errno == EWOULDBLOCK || errno == EINTR) 124 return; 125 cleanup(0); 126 } 127 pbackp += n; 128 if (pbackp == pfrontp) 129 pbackp = pfrontp = ptyobuf; 130 } 131 132 /* 133 * nextitem() 134 * 135 * Return the address of the next "item" in the TELNET data 136 * stream. This will be the address of the next character if 137 * the current address is a user data character, or it will 138 * be the address of the character following the TELNET command 139 * if the current address is a TELNET IAC ("I Am a Command") 140 * character. 141 */ 142 char * 143 nextitem(current) 144 char *current; 145 { 146 if ((*current&0xff) != IAC) { 147 return current+1; 148 } 149 switch (*(current+1)&0xff) { 150 case DO: 151 case DONT: 152 case WILL: 153 case WONT: 154 return current+3; 155 case SB: /* loop forever looking for the SE */ 156 { 157 register char *look = current+2; 158 159 for (;;) { 160 if ((*look++&0xff) == IAC) { 161 if ((*look++&0xff) == SE) { 162 return look; 163 } 164 } 165 } 166 } 167 default: 168 return current+2; 169 } 170 } /* end of nextitem */ 171 172 173 /* 174 * netclear() 175 * 176 * We are about to do a TELNET SYNCH operation. Clear 177 * the path to the network. 178 * 179 * Things are a bit tricky since we may have sent the first 180 * byte or so of a previous TELNET command into the network. 181 * So, we have to scan the network buffer from the beginning 182 * until we are up to where we want to be. 183 * 184 * A side effect of what we do, just to keep things 185 * simple, is to clear the urgent data pointer. The principal 186 * caller should be setting the urgent data pointer AFTER calling 187 * us in any case. 188 */ 189 void 190 netclear() 191 { 192 register char *thisitem, *next; 193 char *good; 194 #define wewant(p) ((nfrontp > p) && ((*p&0xff) == IAC) && \ 195 ((*(p+1)&0xff) != EC) && ((*(p+1)&0xff) != EL)) 196 197 #if defined(ENCRYPT) 198 thisitem = nclearto > netobuf ? nclearto : netobuf; 199 #else 200 thisitem = netobuf; 201 #endif 202 203 while ((next = nextitem(thisitem)) <= nbackp) { 204 thisitem = next; 205 } 206 207 /* Now, thisitem is first before/at boundary. */ 208 209 #if defined(ENCRYPT) 210 good = nclearto > netobuf ? nclearto : netobuf; 211 #else 212 good = netobuf; /* where the good bytes go */ 213 #endif 214 215 while (nfrontp > thisitem) { 216 if (wewant(thisitem)) { 217 int length; 218 219 next = thisitem; 220 do { 221 next = nextitem(next); 222 } while (wewant(next) && (nfrontp > next)); 223 length = next-thisitem; 224 bcopy(thisitem, good, length); 225 good += length; 226 thisitem = next; 227 } else { 228 thisitem = nextitem(thisitem); 229 } 230 } 231 232 nbackp = netobuf; 233 nfrontp = good; /* next byte to be sent */ 234 neturg = 0; 235 } /* end of netclear */ 236 237 /* 238 * netflush 239 * Send as much data as possible to the network, 240 * handling requests for urgent data. 241 */ 242 void 243 netflush() 244 { 245 int n; 246 extern int not42; 247 248 if ((n = nfrontp - nbackp) > 0) { 249 DIAG(TD_REPORT, 250 { sprintf(nfrontp, "td: netflush %d chars\r\n", n); 251 n += strlen(nfrontp); /* get count first */ 252 nfrontp += strlen(nfrontp); /* then move pointer */ 253 }); 254 #if defined(ENCRYPT) 255 if (encrypt_output) { 256 char *s = nclearto ? nclearto : nbackp; 257 if (nfrontp - s > 0) { 258 (*encrypt_output)((unsigned char *)s, nfrontp-s); 259 nclearto = nfrontp; 260 } 261 } 262 #endif 263 /* 264 * if no urgent data, or if the other side appears to be an 265 * old 4.2 client (and thus unable to survive TCP urgent data), 266 * write the entire buffer in non-OOB mode. 267 */ 268 if ((neturg == 0) || (not42 == 0)) { 269 n = write(net, nbackp, n); /* normal write */ 270 } else { 271 n = neturg - nbackp; 272 /* 273 * In 4.2 (and 4.3) systems, there is some question about 274 * what byte in a sendOOB operation is the "OOB" data. 275 * To make ourselves compatible, we only send ONE byte 276 * out of band, the one WE THINK should be OOB (though 277 * we really have more the TCP philosophy of urgent data 278 * rather than the Unix philosophy of OOB data). 279 */ 280 if (n > 1) { 281 n = send(net, nbackp, n-1, 0); /* send URGENT all by itself */ 282 } else { 283 n = send(net, nbackp, n, MSG_OOB); /* URGENT data */ 284 } 285 } 286 } 287 if (n < 0) { 288 if (errno == EWOULDBLOCK || errno == EINTR) 289 return; 290 cleanup(0); 291 } 292 nbackp += n; 293 #if defined(ENCRYPT) 294 if (nbackp > nclearto) 295 nclearto = 0; 296 #endif 297 if (nbackp >= neturg) { 298 neturg = 0; 299 } 300 if (nbackp == nfrontp) { 301 nbackp = nfrontp = netobuf; 302 #if defined(ENCRYPT) 303 nclearto = 0; 304 #endif 305 } 306 return; 307 } /* end of netflush */ 308 309 310 /* 311 * writenet 312 * 313 * Just a handy little function to write a bit of raw data to the net. 314 * It will force a transmit of the buffer if necessary 315 * 316 * arguments 317 * ptr - A pointer to a character string to write 318 * len - How many bytes to write 319 */ 320 void 321 writenet(ptr, len) 322 register unsigned char *ptr; 323 register int len; 324 { 325 /* flush buffer if no room for new data) */ 326 if ((&netobuf[BUFSIZ] - nfrontp) < len) { 327 /* if this fails, don't worry, buffer is a little big */ 328 netflush(); 329 } 330 331 bcopy(ptr, nfrontp, len); 332 nfrontp += len; 333 334 } /* end of writenet */ 335 336 337 /* 338 * miscellaneous functions doing a variety of little jobs follow ... 339 */ 340 341 342 void 343 fatal(f, msg) 344 int f; 345 char *msg; 346 { 347 char buf[BUFSIZ]; 348 349 (void) sprintf(buf, "telnetd: %s.\r\n", msg); 350 #if defined(ENCRYPT) 351 if (encrypt_output) { 352 /* 353 * Better turn off encryption first.... 354 * Hope it flushes... 355 */ 356 encrypt_send_end(); 357 netflush(); 358 } 359 #endif 360 (void) write(f, buf, (int)strlen(buf)); 361 sleep(1); /*XXX*/ 362 exit(1); 363 } 364 365 void 366 fatalperror(f, msg) 367 int f; 368 char *msg; 369 { 370 char buf[BUFSIZ], *strerror(); 371 372 (void) sprintf(buf, "%s: %s\r\n", msg, strerror(errno)); 373 fatal(f, buf); 374 } 375 376 char editedhost[32]; 377 378 void 379 edithost(pat, host) 380 register char *pat; 381 register char *host; 382 { 383 register char *res = editedhost; 384 char *strncpy(); 385 386 if (!pat) 387 pat = ""; 388 while (*pat) { 389 switch (*pat) { 390 391 case '#': 392 if (*host) 393 host++; 394 break; 395 396 case '@': 397 if (*host) 398 *res++ = *host++; 399 break; 400 401 default: 402 *res++ = *pat; 403 break; 404 } 405 if (res == &editedhost[sizeof editedhost - 1]) { 406 *res = '\0'; 407 return; 408 } 409 pat++; 410 } 411 if (*host) 412 (void) strncpy(res, host, 413 sizeof editedhost - (res - editedhost) -1); 414 else 415 *res = '\0'; 416 editedhost[sizeof editedhost - 1] = '\0'; 417 } 418 419 static char *putlocation; 420 421 void 422 putstr(s) 423 register char *s; 424 { 425 426 while (*s) 427 putchr(*s++); 428 } 429 430 void 431 putchr(cc) 432 int cc; 433 { 434 *putlocation++ = cc; 435 } 436 437 /* 438 * This is split on two lines so that SCCS will not see the M 439 * between two % signs and expand it... 440 */ 441 static char fmtstr[] = { "%l:%M\ 442 %P on %A, %d %B %Y" }; 443 444 void 445 putf(cp, where) 446 register char *cp; 447 char *where; 448 { 449 char *slash; 450 time_t t; 451 char db[100]; 452 extern char *rindex(); 453 454 putlocation = where; 455 456 while (*cp) { 457 if (*cp != '%') { 458 putchr(*cp++); 459 continue; 460 } 461 switch (*++cp) { 462 463 case 't': 464 slash = rindex(line, '/'); 465 if (slash == (char *) 0) 466 putstr(line); 467 else 468 putstr(&slash[1]); 469 break; 470 471 case 'h': 472 putstr(editedhost); 473 break; 474 475 case 'd': 476 (void)time(&t); 477 (void)strftime(db, sizeof(db), fmtstr, localtime(&t)); 478 putstr(db); 479 break; 480 481 case '%': 482 putchr('%'); 483 break; 484 } 485 cp++; 486 } 487 } 488 489 #ifdef DIAGNOSTICS 490 /* 491 * Print telnet options and commands in plain text, if possible. 492 */ 493 void 494 printoption(fmt, option) 495 register char *fmt; 496 register int option; 497 { 498 if (TELOPT_OK(option)) 499 sprintf(nfrontp, "%s %s\r\n", fmt, TELOPT(option)); 500 else if (TELCMD_OK(option)) 501 sprintf(nfrontp, "%s %s\r\n", fmt, TELCMD(option)); 502 else 503 sprintf(nfrontp, "%s %d\r\n", fmt, option); 504 nfrontp += strlen(nfrontp); 505 return; 506 } 507 508 void 509 printsub(direction, pointer, length) 510 char direction; /* '<' or '>' */ 511 unsigned char *pointer; /* where suboption data sits */ 512 int length; /* length of suboption data */ 513 { 514 register int i; 515 char buf[512]; 516 517 if (!(diagnostic & TD_OPTIONS)) 518 return; 519 520 if (direction) { 521 sprintf(nfrontp, "td: %s suboption ", 522 direction == '<' ? "recv" : "send"); 523 nfrontp += strlen(nfrontp); 524 if (length >= 3) { 525 register int j; 526 527 i = pointer[length-2]; 528 j = pointer[length-1]; 529 530 if (i != IAC || j != SE) { 531 sprintf(nfrontp, "(terminated by "); 532 nfrontp += strlen(nfrontp); 533 if (TELOPT_OK(i)) 534 sprintf(nfrontp, "%s ", TELOPT(i)); 535 else if (TELCMD_OK(i)) 536 sprintf(nfrontp, "%s ", TELCMD(i)); 537 else 538 sprintf(nfrontp, "%d ", i); 539 nfrontp += strlen(nfrontp); 540 if (TELOPT_OK(j)) 541 sprintf(nfrontp, "%s", TELOPT(j)); 542 else if (TELCMD_OK(j)) 543 sprintf(nfrontp, "%s", TELCMD(j)); 544 else 545 sprintf(nfrontp, "%d", j); 546 nfrontp += strlen(nfrontp); 547 sprintf(nfrontp, ", not IAC SE!) "); 548 nfrontp += strlen(nfrontp); 549 } 550 } 551 length -= 2; 552 } 553 if (length < 1) { 554 sprintf(nfrontp, "(Empty suboption???)"); 555 nfrontp += strlen(nfrontp); 556 return; 557 } 558 switch (pointer[0]) { 559 case TELOPT_TTYPE: 560 sprintf(nfrontp, "TERMINAL-TYPE "); 561 nfrontp += strlen(nfrontp); 562 switch (pointer[1]) { 563 case TELQUAL_IS: 564 sprintf(nfrontp, "IS \"%.*s\"", length-2, (char *)pointer+2); 565 break; 566 case TELQUAL_SEND: 567 sprintf(nfrontp, "SEND"); 568 break; 569 default: 570 sprintf(nfrontp, 571 "- unknown qualifier %d (0x%x).", 572 pointer[1], pointer[1]); 573 } 574 nfrontp += strlen(nfrontp); 575 break; 576 case TELOPT_TSPEED: 577 sprintf(nfrontp, "TERMINAL-SPEED"); 578 nfrontp += strlen(nfrontp); 579 if (length < 2) { 580 sprintf(nfrontp, " (empty suboption???)"); 581 nfrontp += strlen(nfrontp); 582 break; 583 } 584 switch (pointer[1]) { 585 case TELQUAL_IS: 586 sprintf(nfrontp, " IS %.*s", length-2, (char *)pointer+2); 587 nfrontp += strlen(nfrontp); 588 break; 589 default: 590 if (pointer[1] == 1) 591 sprintf(nfrontp, " SEND"); 592 else 593 sprintf(nfrontp, " %d (unknown)", pointer[1]); 594 nfrontp += strlen(nfrontp); 595 for (i = 2; i < length; i++) { 596 sprintf(nfrontp, " ?%d?", pointer[i]); 597 nfrontp += strlen(nfrontp); 598 } 599 break; 600 } 601 break; 602 603 case TELOPT_LFLOW: 604 sprintf(nfrontp, "TOGGLE-FLOW-CONTROL"); 605 nfrontp += strlen(nfrontp); 606 if (length < 2) { 607 sprintf(nfrontp, " (empty suboption???)"); 608 nfrontp += strlen(nfrontp); 609 break; 610 } 611 switch (pointer[1]) { 612 case 0: 613 sprintf(nfrontp, " OFF"); break; 614 case 1: 615 sprintf(nfrontp, " ON"); break; 616 default: 617 sprintf(nfrontp, " %d (unknown)", pointer[1]); 618 } 619 nfrontp += strlen(nfrontp); 620 for (i = 2; i < length; i++) { 621 sprintf(nfrontp, " ?%d?", pointer[i]); 622 nfrontp += strlen(nfrontp); 623 } 624 break; 625 626 case TELOPT_NAWS: 627 sprintf(nfrontp, "NAWS"); 628 nfrontp += strlen(nfrontp); 629 if (length < 2) { 630 sprintf(nfrontp, " (empty suboption???)"); 631 nfrontp += strlen(nfrontp); 632 break; 633 } 634 if (length == 2) { 635 sprintf(nfrontp, " ?%d?", pointer[1]); 636 nfrontp += strlen(nfrontp); 637 break; 638 } 639 sprintf(nfrontp, " %d %d (%d)", 640 pointer[1], pointer[2], 641 (int)((((unsigned int)pointer[1])<<8)|((unsigned int)pointer[2]))); 642 nfrontp += strlen(nfrontp); 643 if (length == 4) { 644 sprintf(nfrontp, " ?%d?", pointer[3]); 645 nfrontp += strlen(nfrontp); 646 break; 647 } 648 sprintf(nfrontp, " %d %d (%d)", 649 pointer[3], pointer[4], 650 (int)((((unsigned int)pointer[3])<<8)|((unsigned int)pointer[4]))); 651 nfrontp += strlen(nfrontp); 652 for (i = 5; i < length; i++) { 653 sprintf(nfrontp, " ?%d?", pointer[i]); 654 nfrontp += strlen(nfrontp); 655 } 656 break; 657 658 case TELOPT_LINEMODE: 659 sprintf(nfrontp, "LINEMODE "); 660 nfrontp += strlen(nfrontp); 661 if (length < 2) { 662 sprintf(nfrontp, " (empty suboption???)"); 663 nfrontp += strlen(nfrontp); 664 break; 665 } 666 switch (pointer[1]) { 667 case WILL: 668 sprintf(nfrontp, "WILL "); 669 goto common; 670 case WONT: 671 sprintf(nfrontp, "WONT "); 672 goto common; 673 case DO: 674 sprintf(nfrontp, "DO "); 675 goto common; 676 case DONT: 677 sprintf(nfrontp, "DONT "); 678 common: 679 nfrontp += strlen(nfrontp); 680 if (length < 3) { 681 sprintf(nfrontp, "(no option???)"); 682 nfrontp += strlen(nfrontp); 683 break; 684 } 685 switch (pointer[2]) { 686 case LM_FORWARDMASK: 687 sprintf(nfrontp, "Forward Mask"); 688 nfrontp += strlen(nfrontp); 689 for (i = 3; i < length; i++) { 690 sprintf(nfrontp, " %x", pointer[i]); 691 nfrontp += strlen(nfrontp); 692 } 693 break; 694 default: 695 sprintf(nfrontp, "%d (unknown)", pointer[2]); 696 nfrontp += strlen(nfrontp); 697 for (i = 3; i < length; i++) { 698 sprintf(nfrontp, " %d", pointer[i]); 699 nfrontp += strlen(nfrontp); 700 } 701 break; 702 } 703 break; 704 705 case LM_SLC: 706 sprintf(nfrontp, "SLC"); 707 nfrontp += strlen(nfrontp); 708 for (i = 2; i < length - 2; i += 3) { 709 if (SLC_NAME_OK(pointer[i+SLC_FUNC])) 710 sprintf(nfrontp, " %s", SLC_NAME(pointer[i+SLC_FUNC])); 711 else 712 sprintf(nfrontp, " %d", pointer[i+SLC_FUNC]); 713 nfrontp += strlen(nfrontp); 714 switch (pointer[i+SLC_FLAGS]&SLC_LEVELBITS) { 715 case SLC_NOSUPPORT: 716 sprintf(nfrontp, " NOSUPPORT"); break; 717 case SLC_CANTCHANGE: 718 sprintf(nfrontp, " CANTCHANGE"); break; 719 case SLC_VARIABLE: 720 sprintf(nfrontp, " VARIABLE"); break; 721 case SLC_DEFAULT: 722 sprintf(nfrontp, " DEFAULT"); break; 723 } 724 nfrontp += strlen(nfrontp); 725 sprintf(nfrontp, "%s%s%s", 726 pointer[i+SLC_FLAGS]&SLC_ACK ? "|ACK" : "", 727 pointer[i+SLC_FLAGS]&SLC_FLUSHIN ? "|FLUSHIN" : "", 728 pointer[i+SLC_FLAGS]&SLC_FLUSHOUT ? "|FLUSHOUT" : ""); 729 nfrontp += strlen(nfrontp); 730 if (pointer[i+SLC_FLAGS]& ~(SLC_ACK|SLC_FLUSHIN| 731 SLC_FLUSHOUT| SLC_LEVELBITS)) { 732 sprintf(nfrontp, "(0x%x)", pointer[i+SLC_FLAGS]); 733 nfrontp += strlen(nfrontp); 734 } 735 sprintf(nfrontp, " %d;", pointer[i+SLC_VALUE]); 736 nfrontp += strlen(nfrontp); 737 if ((pointer[i+SLC_VALUE] == IAC) && 738 (pointer[i+SLC_VALUE+1] == IAC)) 739 i++; 740 } 741 for (; i < length; i++) { 742 sprintf(nfrontp, " ?%d?", pointer[i]); 743 nfrontp += strlen(nfrontp); 744 } 745 break; 746 747 case LM_MODE: 748 sprintf(nfrontp, "MODE "); 749 nfrontp += strlen(nfrontp); 750 if (length < 3) { 751 sprintf(nfrontp, "(no mode???)"); 752 nfrontp += strlen(nfrontp); 753 break; 754 } 755 { 756 char tbuf[32]; 757 sprintf(tbuf, "%s%s%s%s%s", 758 pointer[2]&MODE_EDIT ? "|EDIT" : "", 759 pointer[2]&MODE_TRAPSIG ? "|TRAPSIG" : "", 760 pointer[2]&MODE_SOFT_TAB ? "|SOFT_TAB" : "", 761 pointer[2]&MODE_LIT_ECHO ? "|LIT_ECHO" : "", 762 pointer[2]&MODE_ACK ? "|ACK" : ""); 763 sprintf(nfrontp, "%s", tbuf[1] ? &tbuf[1] : "0"); 764 nfrontp += strlen(nfrontp); 765 } 766 if (pointer[2]&~(MODE_EDIT|MODE_TRAPSIG|MODE_ACK)) { 767 sprintf(nfrontp, " (0x%x)", pointer[2]); 768 nfrontp += strlen(nfrontp); 769 } 770 for (i = 3; i < length; i++) { 771 sprintf(nfrontp, " ?0x%x?", pointer[i]); 772 nfrontp += strlen(nfrontp); 773 } 774 break; 775 default: 776 sprintf(nfrontp, "%d (unknown)", pointer[1]); 777 nfrontp += strlen(nfrontp); 778 for (i = 2; i < length; i++) { 779 sprintf(nfrontp, " %d", pointer[i]); 780 nfrontp += strlen(nfrontp); 781 } 782 } 783 break; 784 785 case TELOPT_STATUS: { 786 register char *cp; 787 register int j, k; 788 789 sprintf(nfrontp, "STATUS"); 790 nfrontp += strlen(nfrontp); 791 792 switch (pointer[1]) { 793 default: 794 if (pointer[1] == TELQUAL_SEND) 795 sprintf(nfrontp, " SEND"); 796 else 797 sprintf(nfrontp, " %d (unknown)", pointer[1]); 798 nfrontp += strlen(nfrontp); 799 for (i = 2; i < length; i++) { 800 sprintf(nfrontp, " ?%d?", pointer[i]); 801 nfrontp += strlen(nfrontp); 802 } 803 break; 804 case TELQUAL_IS: 805 sprintf(nfrontp, " IS\r\n"); 806 nfrontp += strlen(nfrontp); 807 808 for (i = 2; i < length; i++) { 809 switch(pointer[i]) { 810 case DO: cp = "DO"; goto common2; 811 case DONT: cp = "DONT"; goto common2; 812 case WILL: cp = "WILL"; goto common2; 813 case WONT: cp = "WONT"; goto common2; 814 common2: 815 i++; 816 if (TELOPT_OK((int)pointer[i])) 817 sprintf(nfrontp, " %s %s", cp, TELOPT(pointer[i])); 818 else 819 sprintf(nfrontp, " %s %d", cp, pointer[i]); 820 nfrontp += strlen(nfrontp); 821 822 sprintf(nfrontp, "\r\n"); 823 nfrontp += strlen(nfrontp); 824 break; 825 826 case SB: 827 sprintf(nfrontp, " SB "); 828 nfrontp += strlen(nfrontp); 829 i++; 830 j = k = i; 831 while (j < length) { 832 if (pointer[j] == SE) { 833 if (j+1 == length) 834 break; 835 if (pointer[j+1] == SE) 836 j++; 837 else 838 break; 839 } 840 pointer[k++] = pointer[j++]; 841 } 842 printsub(0, &pointer[i], k - i); 843 if (i < length) { 844 sprintf(nfrontp, " SE"); 845 nfrontp += strlen(nfrontp); 846 i = j; 847 } else 848 i = j - 1; 849 850 sprintf(nfrontp, "\r\n"); 851 nfrontp += strlen(nfrontp); 852 853 break; 854 855 default: 856 sprintf(nfrontp, " %d", pointer[i]); 857 nfrontp += strlen(nfrontp); 858 break; 859 } 860 } 861 break; 862 } 863 break; 864 } 865 866 case TELOPT_XDISPLOC: 867 sprintf(nfrontp, "X-DISPLAY-LOCATION "); 868 nfrontp += strlen(nfrontp); 869 switch (pointer[1]) { 870 case TELQUAL_IS: 871 sprintf(nfrontp, "IS \"%.*s\"", length-2, (char *)pointer+2); 872 break; 873 case TELQUAL_SEND: 874 sprintf(nfrontp, "SEND"); 875 break; 876 default: 877 sprintf(nfrontp, "- unknown qualifier %d (0x%x).", 878 pointer[1], pointer[1]); 879 } 880 nfrontp += strlen(nfrontp); 881 break; 882 883 case TELOPT_ENVIRON: 884 sprintf(nfrontp, "ENVIRON "); 885 nfrontp += strlen(nfrontp); 886 switch (pointer[1]) { 887 case TELQUAL_IS: 888 sprintf(nfrontp, "IS "); 889 goto env_common; 890 case TELQUAL_SEND: 891 sprintf(nfrontp, "SEND "); 892 goto env_common; 893 case TELQUAL_INFO: 894 sprintf(nfrontp, "INFO "); 895 env_common: 896 nfrontp += strlen(nfrontp); 897 { 898 register int noquote = 2; 899 for (i = 2; i < length; i++ ) { 900 switch (pointer[i]) { 901 case ENV_VAR: 902 if (pointer[1] == TELQUAL_SEND) 903 goto def_case; 904 sprintf(nfrontp, "\" VAR " + noquote); 905 nfrontp += strlen(nfrontp); 906 noquote = 2; 907 break; 908 909 case ENV_VALUE: 910 sprintf(nfrontp, "\" VALUE " + noquote); 911 nfrontp += strlen(nfrontp); 912 noquote = 2; 913 break; 914 915 case ENV_ESC: 916 sprintf(nfrontp, "\" ESC " + noquote); 917 nfrontp += strlen(nfrontp); 918 noquote = 2; 919 break; 920 921 default: 922 def_case: 923 if (isprint(pointer[i]) && pointer[i] != '"') { 924 if (noquote) { 925 *nfrontp++ = '"'; 926 noquote = 0; 927 } 928 *nfrontp++ = pointer[i]; 929 } else { 930 sprintf(nfrontp, "\" %03o " + noquote, 931 pointer[i]); 932 nfrontp += strlen(nfrontp); 933 noquote = 2; 934 } 935 break; 936 } 937 } 938 if (!noquote) 939 *nfrontp++ = '"'; 940 break; 941 } 942 } 943 break; 944 945 #if defined(AUTHENTICATE) 946 case TELOPT_AUTHENTICATION: 947 sprintf(nfrontp, "AUTHENTICATION"); 948 nfrontp += strlen(nfrontp); 949 950 if (length < 2) { 951 sprintf(nfrontp, " (empty suboption???)"); 952 nfrontp += strlen(nfrontp); 953 break; 954 } 955 switch (pointer[1]) { 956 case TELQUAL_REPLY: 957 case TELQUAL_IS: 958 sprintf(nfrontp, " %s ", (pointer[1] == TELQUAL_IS) ? 959 "IS" : "REPLY"); 960 nfrontp += strlen(nfrontp); 961 if (AUTHTYPE_NAME_OK(pointer[2])) 962 sprintf(nfrontp, "%s ", AUTHTYPE_NAME(pointer[2])); 963 else 964 sprintf(nfrontp, "%d ", pointer[2]); 965 nfrontp += strlen(nfrontp); 966 if (length < 3) { 967 sprintf(nfrontp, "(partial suboption???)"); 968 nfrontp += strlen(nfrontp); 969 break; 970 } 971 sprintf(nfrontp, "%s|%s", 972 ((pointer[3] & AUTH_WHO_MASK) == AUTH_WHO_CLIENT) ? 973 "CLIENT" : "SERVER", 974 ((pointer[3] & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL) ? 975 "MUTUAL" : "ONE-WAY"); 976 nfrontp += strlen(nfrontp); 977 978 auth_printsub(&pointer[1], length - 1, buf, sizeof(buf)); 979 sprintf(nfrontp, "%s", buf); 980 nfrontp += strlen(nfrontp); 981 break; 982 983 case TELQUAL_SEND: 984 i = 2; 985 sprintf(nfrontp, " SEND "); 986 nfrontp += strlen(nfrontp); 987 while (i < length) { 988 if (AUTHTYPE_NAME_OK(pointer[i])) 989 sprintf(nfrontp, "%s ", AUTHTYPE_NAME(pointer[i])); 990 else 991 sprintf(nfrontp, "%d ", pointer[i]); 992 nfrontp += strlen(nfrontp); 993 if (++i >= length) { 994 sprintf(nfrontp, "(partial suboption???)"); 995 nfrontp += strlen(nfrontp); 996 break; 997 } 998 sprintf(nfrontp, "%s|%s ", 999 ((pointer[i] & AUTH_WHO_MASK) == AUTH_WHO_CLIENT) ? 1000 "CLIENT" : "SERVER", 1001 ((pointer[i] & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL) ? 1002 "MUTUAL" : "ONE-WAY"); 1003 nfrontp += strlen(nfrontp); 1004 ++i; 1005 } 1006 break; 1007 1008 case TELQUAL_NAME: 1009 i = 2; 1010 sprintf(nfrontp, " NAME \""); 1011 nfrontp += strlen(nfrontp); 1012 while (i < length) 1013 *nfrontp += pointer[i++]; 1014 *nfrontp += '"'; 1015 break; 1016 1017 default: 1018 for (i = 2; i < length; i++) { 1019 sprintf(nfrontp, " ?%d?", pointer[i]); 1020 nfrontp += strlen(nfrontp); 1021 } 1022 break; 1023 } 1024 break; 1025 #endif 1026 1027 #if defined(ENCRYPT) 1028 case TELOPT_ENCRYPT: 1029 sprintf(nfrontp, "ENCRYPT"); 1030 nfrontp += strlen(nfrontp); 1031 if (length < 2) { 1032 sprintf(nfrontp, " (empty suboption???)"); 1033 nfrontp += strlen(nfrontp); 1034 break; 1035 } 1036 switch (pointer[1]) { 1037 case ENCRYPT_START: 1038 sprintf(nfrontp, " START"); 1039 nfrontp += strlen(nfrontp); 1040 break; 1041 1042 case ENCRYPT_END: 1043 sprintf(nfrontp, " END"); 1044 nfrontp += strlen(nfrontp); 1045 break; 1046 1047 case ENCRYPT_REQSTART: 1048 sprintf(nfrontp, " REQUEST-START"); 1049 nfrontp += strlen(nfrontp); 1050 break; 1051 1052 case ENCRYPT_REQEND: 1053 sprintf(nfrontp, " REQUEST-END"); 1054 nfrontp += strlen(nfrontp); 1055 break; 1056 1057 case ENCRYPT_IS: 1058 case ENCRYPT_REPLY: 1059 sprintf(nfrontp, " %s ", (pointer[1] == ENCRYPT_IS) ? 1060 "IS" : "REPLY"); 1061 nfrontp += strlen(nfrontp); 1062 if (length < 3) { 1063 sprintf(nfrontp, " (partial suboption???)"); 1064 nfrontp += strlen(nfrontp); 1065 break; 1066 } 1067 if (ENCTYPE_NAME_OK(pointer[2])) 1068 sprintf(nfrontp, "%s ", ENCTYPE_NAME(pointer[2])); 1069 else 1070 sprintf(nfrontp, " %d (unknown)", pointer[2]); 1071 nfrontp += strlen(nfrontp); 1072 1073 encrypt_printsub(&pointer[1], length - 1, buf, sizeof(buf)); 1074 sprintf(nfrontp, "%s", buf); 1075 nfrontp += strlen(nfrontp); 1076 break; 1077 1078 case ENCRYPT_SUPPORT: 1079 i = 2; 1080 sprintf(nfrontp, " SUPPORT "); 1081 nfrontp += strlen(nfrontp); 1082 while (i < length) { 1083 if (ENCTYPE_NAME_OK(pointer[i])) 1084 sprintf(nfrontp, "%s ", ENCTYPE_NAME(pointer[i])); 1085 else 1086 sprintf(nfrontp, "%d ", pointer[i]); 1087 nfrontp += strlen(nfrontp); 1088 i++; 1089 } 1090 break; 1091 1092 case ENCRYPT_ENC_KEYID: 1093 sprintf(nfrontp, " ENC_KEYID", pointer[1]); 1094 nfrontp += strlen(nfrontp); 1095 goto encommon; 1096 1097 case ENCRYPT_DEC_KEYID: 1098 sprintf(nfrontp, " DEC_KEYID", pointer[1]); 1099 nfrontp += strlen(nfrontp); 1100 goto encommon; 1101 1102 default: 1103 sprintf(nfrontp, " %d (unknown)", pointer[1]); 1104 nfrontp += strlen(nfrontp); 1105 encommon: 1106 for (i = 2; i < length; i++) { 1107 sprintf(nfrontp, " %d", pointer[i]); 1108 nfrontp += strlen(nfrontp); 1109 } 1110 break; 1111 } 1112 break; 1113 #endif 1114 1115 default: 1116 if (TELOPT_OK(pointer[0])) 1117 sprintf(nfrontp, "%s (unknown)", TELOPT(pointer[0])); 1118 else 1119 sprintf(nfrontp, "%d (unknown)", pointer[i]); 1120 nfrontp += strlen(nfrontp); 1121 for (i = 1; i < length; i++) { 1122 sprintf(nfrontp, " %d", pointer[i]); 1123 nfrontp += strlen(nfrontp); 1124 } 1125 break; 1126 } 1127 sprintf(nfrontp, "\r\n"); 1128 nfrontp += strlen(nfrontp); 1129 } 1130 1131 /* 1132 * Dump a data buffer in hex and ascii to the output data stream. 1133 */ 1134 void 1135 printdata(tag, ptr, cnt) 1136 register char *tag; 1137 register char *ptr; 1138 register int cnt; 1139 { 1140 register int i; 1141 char xbuf[30]; 1142 1143 while (cnt) { 1144 /* flush net output buffer if no room for new data) */ 1145 if ((&netobuf[BUFSIZ] - nfrontp) < 80) { 1146 netflush(); 1147 } 1148 1149 /* add a line of output */ 1150 sprintf(nfrontp, "%s: ", tag); 1151 nfrontp += strlen(nfrontp); 1152 for (i = 0; i < 20 && cnt; i++) { 1153 sprintf(nfrontp, "%02x", *ptr); 1154 nfrontp += strlen(nfrontp); 1155 if (isprint(*ptr)) { 1156 xbuf[i] = *ptr; 1157 } else { 1158 xbuf[i] = '.'; 1159 } 1160 if (i % 2) { 1161 *nfrontp = ' '; 1162 nfrontp++; 1163 } 1164 cnt--; 1165 ptr++; 1166 } 1167 xbuf[i] = '\0'; 1168 sprintf(nfrontp, " %s\r\n", xbuf ); 1169 nfrontp += strlen(nfrontp); 1170 } 1171 } 1172 #endif /* DIAGNOSTICS */ 1173
Indexes created Sat Sep 27 14:09:57 GMT 2025