1 /* 2 * Copyright (c) 1989, 1993 3 * The Regents of the University of California. 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. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #if 0 31 #ifndef lint 32 static const char sccsid[] = "@(#)utility.c 8.4 (Berkeley) 5/30/95"; 33 #endif /* not lint */ 34 #endif 35 #include <sys/cdefs.h> 36 __FBSDID("$FreeBSD$"); 37 38 #ifdef __FreeBSD__ 39 #include <locale.h> 40 #include <sys/utsname.h> 41 #endif 42 #include <string.h> 43 #define PRINTOPTIONS 44 #include "telnetd.h" 45 46 #ifdef AUTHENTICATION 47 #include <libtelnet/auth.h> 48 #endif 49 #ifdef ENCRYPTION 50 #include <libtelnet/encrypt.h> 51 #endif 52 53 /* 54 * utility functions performing io related tasks 55 */ 56 57 /* 58 * ttloop 59 * 60 * A small subroutine to flush the network output buffer, get some data 61 * from the network, and pass it through the telnet state machine. We 62 * also flush the pty input buffer (by dropping its data) if it becomes 63 * too full. 64 */ 65 66 void 67 ttloop() 68 { 69 70 DIAG(TD_REPORT, output_data("td: ttloop\r\n")); 71 if (nfrontp - nbackp > 0) { 72 netflush(); 73 } 74 ncc = read(net, netibuf, sizeof netibuf); 75 if (ncc < 0) { 76 syslog(LOG_INFO, "ttloop: read: %m"); 77 exit(1); 78 } else if (ncc == 0) { 79 syslog(LOG_INFO, "ttloop: peer died: %m"); 80 exit(1); 81 } 82 DIAG(TD_REPORT, output_data("td: ttloop read %d chars\r\n", ncc)); 83 netip = netibuf; 84 telrcv(); /* state machine */ 85 if (ncc > 0) { 86 pfrontp = pbackp = ptyobuf; 87 telrcv(); 88 } 89 } /* end of ttloop */ 90 91 /* 92 * Check a descriptor to see if out of band data exists on it. 93 */ 94 int 95 stilloob(int s) 96 { 97 static struct timeval timeout = { 0, 0 }; 98 fd_set excepts; 99 int value; 100 101 do { 102 FD_ZERO(&excepts); 103 FD_SET(s, &excepts); 104 memset((char *)&timeout, 0, sizeof timeout); 105 value = select(s+1, (fd_set *)0, (fd_set *)0, &excepts, &timeout); 106 } while ((value == -1) && (errno == EINTR)); 107 108 if (value < 0) { 109 fatalperror(pty, "select"); 110 } 111 if (FD_ISSET(s, &excepts)) { 112 return 1; 113 } else { 114 return 0; 115 } 116 } 117 118 void 119 ptyflush(void) 120 { 121 int n; 122 123 if ((n = pfrontp - pbackp) > 0) { 124 DIAG(TD_REPORT | TD_PTYDATA, 125 output_data("td: ptyflush %d chars\r\n", n)); 126 DIAG(TD_PTYDATA, printdata("pd", pbackp, n)); 127 n = write(pty, pbackp, n); 128 } 129 if (n < 0) { 130 if (errno == EWOULDBLOCK || errno == EINTR) 131 return; 132 cleanup(0); 133 } 134 pbackp += n; 135 if (pbackp == pfrontp) 136 pbackp = pfrontp = ptyobuf; 137 } 138 139 /* 140 * nextitem() 141 * 142 * Return the address of the next "item" in the TELNET data 143 * stream. This will be the address of the next character if 144 * the current address is a user data character, or it will 145 * be the address of the character following the TELNET command 146 * if the current address is a TELNET IAC ("I Am a Command") 147 * character. 148 */ 149 static char * 150 nextitem(char *current, const char *endp) 151 { 152 if (current >= endp) { 153 return NULL; 154 } 155 if ((*current&0xff) != IAC) { 156 return current+1; 157 } 158 if (current+1 >= endp) { 159 return NULL; 160 } 161 switch (*(current+1)&0xff) { 162 case DO: 163 case DONT: 164 case WILL: 165 case WONT: 166 return current+3 <= endp ? current+3 : NULL; 167 case SB: /* loop forever looking for the SE */ 168 { 169 char *look = current+2; 170 171 while (look < endp) { 172 if ((*look++&0xff) == IAC) { 173 if (look < endp && (*look++&0xff) == SE) { 174 return look; 175 } 176 } 177 } 178 return NULL; 179 } 180 default: 181 return current+2 <= endp ? current+2 : NULL; 182 } 183 } /* end of nextitem */ 184 185 /* 186 * netclear() 187 * 188 * We are about to do a TELNET SYNCH operation. Clear 189 * the path to the network. 190 * 191 * Things are a bit tricky since we may have sent the first 192 * byte or so of a previous TELNET command into the network. 193 * So, we have to scan the network buffer from the beginning 194 * until we are up to where we want to be. 195 * 196 * A side effect of what we do, just to keep things 197 * simple, is to clear the urgent data pointer. The principal 198 * caller should be setting the urgent data pointer AFTER calling 199 * us in any case. 200 */ 201 void 202 netclear(void) 203 { 204 char *thisitem, *next; 205 char *good; 206 #define wewant(p) ((nfrontp > p) && ((*p&0xff) == IAC) && \ 207 (nfrontp > p+1) && ((*(p+1)&0xff) != EC) && ((*(p+1)&0xff) != EL)) 208 209 #ifdef ENCRYPTION 210 thisitem = nclearto > netobuf ? nclearto : netobuf; 211 #else /* ENCRYPTION */ 212 thisitem = netobuf; 213 #endif /* ENCRYPTION */ 214 215 while ((next = nextitem(thisitem, nbackp)) != NULL && (next <= nbackp)) { 216 thisitem = next; 217 } 218 219 /* Now, thisitem is first before/at boundary. */ 220 221 #ifdef ENCRYPTION 222 good = nclearto > netobuf ? nclearto : netobuf; 223 #else /* ENCRYPTION */ 224 good = netobuf; /* where the good bytes go */ 225 #endif /* ENCRYPTION */ 226 227 while ((thisitem != NULL) && (nfrontp > thisitem)) { 228 if (wewant(thisitem)) { 229 int length; 230 231 next = thisitem; 232 do { 233 next = nextitem(next, nfrontp); 234 } while ((next != NULL) && wewant(next) && (nfrontp > next)); 235 if (next == NULL) { 236 next = nfrontp; 237 } 238 length = next-thisitem; 239 memmove(good, thisitem, length); 240 good += length; 241 thisitem = next; 242 } else { 243 thisitem = nextitem(thisitem, nfrontp); 244 } 245 } 246 247 nbackp = netobuf; 248 nfrontp = good; /* next byte to be sent */ 249 neturg = 0; 250 } /* end of netclear */ 251 252 /* 253 * netflush 254 * Send as much data as possible to the network, 255 * handling requests for urgent data. 256 */ 257 void 258 netflush(void) 259 { 260 int n; 261 extern int not42; 262 263 while ((n = nfrontp - nbackp) > 0) { 264 #if 0 265 /* XXX This causes output_data() to recurse and die */ 266 DIAG(TD_REPORT, { 267 n += output_data("td: netflush %d chars\r\n", n); 268 }); 269 #endif 270 #ifdef ENCRYPTION 271 if (encrypt_output) { 272 char *s = nclearto ? nclearto : nbackp; 273 if (nfrontp - s > 0) { 274 (*encrypt_output)((unsigned char *)s, nfrontp-s); 275 nclearto = nfrontp; 276 } 277 } 278 #endif /* ENCRYPTION */ 279 /* 280 * if no urgent data, or if the other side appears to be an 281 * old 4.2 client (and thus unable to survive TCP urgent data), 282 * write the entire buffer in non-OOB mode. 283 */ 284 if ((neturg == 0) || (not42 == 0)) { 285 n = write(net, nbackp, n); /* normal write */ 286 } else { 287 n = neturg - nbackp; 288 /* 289 * In 4.2 (and 4.3) systems, there is some question about 290 * what byte in a sendOOB operation is the "OOB" data. 291 * To make ourselves compatible, we only send ONE byte 292 * out of band, the one WE THINK should be OOB (though 293 * we really have more the TCP philosophy of urgent data 294 * rather than the Unix philosophy of OOB data). 295 */ 296 if (n > 1) { 297 n = send(net, nbackp, n-1, 0); /* send URGENT all by itself */ 298 } else { 299 n = send(net, nbackp, n, MSG_OOB); /* URGENT data */ 300 } 301 } 302 if (n == -1) { 303 if (errno == EWOULDBLOCK || errno == EINTR) 304 continue; 305 cleanup(0); 306 /* NOTREACHED */ 307 } 308 nbackp += n; 309 #ifdef ENCRYPTION 310 if (nbackp > nclearto) 311 nclearto = 0; 312 #endif /* ENCRYPTION */ 313 if (nbackp >= neturg) { 314 neturg = 0; 315 } 316 if (nbackp == nfrontp) { 317 nbackp = nfrontp = netobuf; 318 #ifdef ENCRYPTION 319 nclearto = 0; 320 #endif /* ENCRYPTION */ 321 } 322 } 323 return; 324 } /* end of netflush */ 325 326 327 /* 328 * miscellaneous functions doing a variety of little jobs follow ... 329 */ 330 331 332 void 333 fatal(int f, const char *msg) 334 { 335 char buf[BUFSIZ]; 336 337 (void) snprintf(buf, sizeof(buf), "telnetd: %s.\r\n", msg); 338 #ifdef ENCRYPTION 339 if (encrypt_output) { 340 /* 341 * Better turn off encryption first.... 342 * Hope it flushes... 343 */ 344 encrypt_send_end(); 345 netflush(); 346 } 347 #endif /* ENCRYPTION */ 348 (void) write(f, buf, (int)strlen(buf)); 349 sleep(1); /*XXX*/ 350 exit(1); 351 } 352 353 void 354 fatalperror(int f, const char *msg) 355 { 356 char buf[BUFSIZ]; 357 358 (void) snprintf(buf, sizeof(buf), "%s: %s", msg, strerror(errno)); 359 fatal(f, buf); 360 } 361 362 char editedhost[32]; 363 364 void 365 edithost(char *pat, char *host) 366 { 367 char *res = editedhost; 368 369 if (pat) { 370 while (*pat) { 371 switch (*pat) { 372 373 case '#': 374 if (*host) 375 host++; 376 break; 377 378 case '@': 379 if (*host) 380 *res++ = *host++; 381 break; 382 383 default: 384 *res++ = *pat; 385 break; 386 } 387 if (res == &editedhost[sizeof editedhost - 1]) { 388 *res = '\0'; 389 return; 390 } 391 pat++; 392 } 393 } 394 if (*host) 395 (void) strncpy(res, host, 396 sizeof editedhost - (res - editedhost) -1); 397 else 398 *res = '\0'; 399 editedhost[sizeof editedhost - 1] = '\0'; 400 } 401 402 static char *putlocation; 403 404 static void 405 putstr(const char *s) 406 { 407 408 while (*s) 409 putchr(*s++); 410 } 411 412 void 413 putchr(int cc) 414 { 415 *putlocation++ = cc; 416 } 417 418 #ifdef __FreeBSD__ 419 static char fmtstr[] = { "%+" }; 420 #else 421 static char fmtstr[] = { "%l:%M%P on %A, %d %B %Y" }; 422 #endif 423 424 void 425 putf(char *cp, char *where) 426 { 427 char *slash; 428 time_t t; 429 char db[100]; 430 #ifdef __FreeBSD__ 431 static struct utsname kerninfo; 432 433 if (!*kerninfo.sysname) 434 uname(&kerninfo); 435 #endif 436 437 putlocation = where; 438 439 while (*cp) { 440 if (*cp =='\n') { 441 putstr("\r\n"); 442 cp++; 443 continue; 444 } else if (*cp != '%') { 445 putchr(*cp++); 446 continue; 447 } 448 switch (*++cp) { 449 450 case 't': 451 #ifdef STREAMSPTY 452 /* names are like /dev/pts/2 -- we want pts/2 */ 453 slash = strchr(line+1, '/'); 454 #else 455 slash = strrchr(line, '/'); 456 #endif 457 if (slash == (char *) 0) 458 putstr(line); 459 else 460 putstr(&slash[1]); 461 break; 462 463 case 'h': 464 putstr(editedhost); 465 break; 466 467 case 'd': 468 #ifdef __FreeBSD__ 469 setlocale(LC_TIME, ""); 470 #endif 471 (void)time(&t); 472 (void)strftime(db, sizeof(db), fmtstr, localtime(&t)); 473 putstr(db); 474 break; 475 476 #ifdef __FreeBSD__ 477 case 's': 478 putstr(kerninfo.sysname); 479 break; 480 481 case 'm': 482 putstr(kerninfo.machine); 483 break; 484 485 case 'r': 486 putstr(kerninfo.release); 487 break; 488 489 case 'v': 490 putstr(kerninfo.version); 491 break; 492 #endif 493 494 case '%': 495 putchr('%'); 496 break; 497 } 498 cp++; 499 } 500 } 501 502 #ifdef DIAGNOSTICS 503 /* 504 * Print telnet options and commands in plain text, if possible. 505 */ 506 void 507 printoption(const char *fmt, int option) 508 { 509 if (TELOPT_OK(option)) 510 output_data("%s %s\r\n", fmt, TELOPT(option)); 511 else if (TELCMD_OK(option)) 512 output_data("%s %s\r\n", fmt, TELCMD(option)); 513 else 514 output_data("%s %d\r\n", fmt, option); 515 return; 516 } 517 518 void 519 printsub(char direction, unsigned char *pointer, int length) 520 { 521 int i = 0; 522 523 if (!(diagnostic & TD_OPTIONS)) 524 return; 525 526 if (direction) { 527 output_data("td: %s suboption ", 528 direction == '<' ? "recv" : "send"); 529 if (length >= 3) { 530 int j; 531 532 i = pointer[length-2]; 533 j = pointer[length-1]; 534 535 if (i != IAC || j != SE) { 536 output_data("(terminated by "); 537 if (TELOPT_OK(i)) 538 output_data("%s ", TELOPT(i)); 539 else if (TELCMD_OK(i)) 540 output_data("%s ", TELCMD(i)); 541 else 542 output_data("%d ", i); 543 if (TELOPT_OK(j)) 544 output_data("%s", TELOPT(j)); 545 else if (TELCMD_OK(j)) 546 output_data("%s", TELCMD(j)); 547 else 548 output_data("%d", j); 549 output_data(", not IAC SE!) "); 550 } 551 } 552 length -= 2; 553 } 554 if (length < 1) { 555 output_data("(Empty suboption??\?)"); 556 return; 557 } 558 switch (pointer[0]) { 559 case TELOPT_TTYPE: 560 output_data("TERMINAL-TYPE "); 561 switch (pointer[1]) { 562 case TELQUAL_IS: 563 output_data("IS \"%.*s\"", length-2, (char *)pointer+2); 564 break; 565 case TELQUAL_SEND: 566 output_data("SEND"); 567 break; 568 default: 569 output_data( 570 "- unknown qualifier %d (0x%x).", 571 pointer[1], pointer[1]); 572 } 573 break; 574 case TELOPT_TSPEED: 575 output_data("TERMINAL-SPEED"); 576 if (length < 2) { 577 output_data(" (empty suboption??\?)"); 578 break; 579 } 580 switch (pointer[1]) { 581 case TELQUAL_IS: 582 output_data(" IS %.*s", length-2, (char *)pointer+2); 583 break; 584 default: 585 if (pointer[1] == 1) 586 output_data(" SEND"); 587 else 588 output_data(" %d (unknown)", pointer[1]); 589 for (i = 2; i < length; i++) { 590 output_data(" ?%d?", pointer[i]); 591 } 592 break; 593 } 594 break; 595 596 case TELOPT_LFLOW: 597 output_data("TOGGLE-FLOW-CONTROL"); 598 if (length < 2) { 599 output_data(" (empty suboption??\?)"); 600 break; 601 } 602 switch (pointer[1]) { 603 case LFLOW_OFF: 604 output_data(" OFF"); break; 605 case LFLOW_ON: 606 output_data(" ON"); break; 607 case LFLOW_RESTART_ANY: 608 output_data(" RESTART-ANY"); break; 609 case LFLOW_RESTART_XON: 610 output_data(" RESTART-XON"); break; 611 default: 612 output_data(" %d (unknown)", pointer[1]); 613 } 614 for (i = 2; i < length; i++) { 615 output_data(" ?%d?", pointer[i]); 616 } 617 break; 618 619 case TELOPT_NAWS: 620 output_data("NAWS"); 621 if (length < 2) { 622 output_data(" (empty suboption??\?)"); 623 break; 624 } 625 if (length == 2) { 626 output_data(" ?%d?", pointer[1]); 627 break; 628 } 629 output_data(" %d %d (%d)", 630 pointer[1], pointer[2], 631 (int)((((unsigned int)pointer[1])<<8)|((unsigned int)pointer[2]))); 632 if (length == 4) { 633 output_data(" ?%d?", pointer[3]); 634 break; 635 } 636 output_data(" %d %d (%d)", 637 pointer[3], pointer[4], 638 (int)((((unsigned int)pointer[3])<<8)|((unsigned int)pointer[4]))); 639 for (i = 5; i < length; i++) { 640 output_data(" ?%d?", pointer[i]); 641 } 642 break; 643 644 case TELOPT_LINEMODE: 645 output_data("LINEMODE "); 646 if (length < 2) { 647 output_data(" (empty suboption??\?)"); 648 break; 649 } 650 switch (pointer[1]) { 651 case WILL: 652 output_data("WILL "); 653 goto common; 654 case WONT: 655 output_data("WONT "); 656 goto common; 657 case DO: 658 output_data("DO "); 659 goto common; 660 case DONT: 661 output_data("DONT "); 662 common: 663 if (length < 3) { 664 output_data("(no option??\?)"); 665 break; 666 } 667 switch (pointer[2]) { 668 case LM_FORWARDMASK: 669 output_data("Forward Mask"); 670 for (i = 3; i < length; i++) { 671 output_data(" %x", pointer[i]); 672 } 673 break; 674 default: 675 output_data("%d (unknown)", pointer[2]); 676 for (i = 3; i < length; i++) { 677 output_data(" %d", pointer[i]); 678 } 679 break; 680 } 681 break; 682 683 case LM_SLC: 684 output_data("SLC"); 685 for (i = 2; i < length - 2; i += 3) { 686 if (SLC_NAME_OK(pointer[i+SLC_FUNC])) 687 output_data(" %s", SLC_NAME(pointer[i+SLC_FUNC])); 688 else 689 output_data(" %d", pointer[i+SLC_FUNC]); 690 switch (pointer[i+SLC_FLAGS]&SLC_LEVELBITS) { 691 case SLC_NOSUPPORT: 692 output_data(" NOSUPPORT"); break; 693 case SLC_CANTCHANGE: 694 output_data(" CANTCHANGE"); break; 695 case SLC_VARIABLE: 696 output_data(" VARIABLE"); break; 697 case SLC_DEFAULT: 698 output_data(" DEFAULT"); break; 699 } 700 output_data("%s%s%s", 701 pointer[i+SLC_FLAGS]&SLC_ACK ? "|ACK" : "", 702 pointer[i+SLC_FLAGS]&SLC_FLUSHIN ? "|FLUSHIN" : "", 703 pointer[i+SLC_FLAGS]&SLC_FLUSHOUT ? "|FLUSHOUT" : ""); 704 if (pointer[i+SLC_FLAGS]& ~(SLC_ACK|SLC_FLUSHIN| 705 SLC_FLUSHOUT| SLC_LEVELBITS)) { 706 output_data("(0x%x)", pointer[i+SLC_FLAGS]); 707 } 708 output_data(" %d;", pointer[i+SLC_VALUE]); 709 if ((pointer[i+SLC_VALUE] == IAC) && 710 (pointer[i+SLC_VALUE+1] == IAC)) 711 i++; 712 } 713 for (; i < length; i++) { 714 output_data(" ?%d?", pointer[i]); 715 } 716 break; 717 718 case LM_MODE: 719 output_data("MODE "); 720 if (length < 3) { 721 output_data("(no mode??\?)"); 722 break; 723 } 724 { 725 char tbuf[32]; 726 sprintf(tbuf, "%s%s%s%s%s", 727 pointer[2]&MODE_EDIT ? "|EDIT" : "", 728 pointer[2]&MODE_TRAPSIG ? "|TRAPSIG" : "", 729 pointer[2]&MODE_SOFT_TAB ? "|SOFT_TAB" : "", 730 pointer[2]&MODE_LIT_ECHO ? "|LIT_ECHO" : "", 731 pointer[2]&MODE_ACK ? "|ACK" : ""); 732 output_data("%s", tbuf[1] ? &tbuf[1] : "0"); 733 } 734 if (pointer[2]&~(MODE_EDIT|MODE_TRAPSIG|MODE_ACK)) { 735 output_data(" (0x%x)", pointer[2]); 736 } 737 for (i = 3; i < length; i++) { 738 output_data(" ?0x%x?", pointer[i]); 739 } 740 break; 741 default: 742 output_data("%d (unknown)", pointer[1]); 743 for (i = 2; i < length; i++) { 744 output_data(" %d", pointer[i]); 745 } 746 } 747 break; 748 749 case TELOPT_STATUS: { 750 const char *cp; 751 int j, k; 752 753 output_data("STATUS"); 754 755 switch (pointer[1]) { 756 default: 757 if (pointer[1] == TELQUAL_SEND) 758 output_data(" SEND"); 759 else 760 output_data(" %d (unknown)", pointer[1]); 761 for (i = 2; i < length; i++) { 762 output_data(" ?%d?", pointer[i]); 763 } 764 break; 765 case TELQUAL_IS: 766 output_data(" IS\r\n"); 767 768 for (i = 2; i < length; i++) { 769 switch(pointer[i]) { 770 case DO: cp = "DO"; goto common2; 771 case DONT: cp = "DONT"; goto common2; 772 case WILL: cp = "WILL"; goto common2; 773 case WONT: cp = "WONT"; goto common2; 774 common2: 775 i++; 776 if (TELOPT_OK(pointer[i])) 777 output_data(" %s %s", cp, TELOPT(pointer[i])); 778 else 779 output_data(" %s %d", cp, pointer[i]); 780 781 output_data("\r\n"); 782 break; 783 784 case SB: 785 output_data(" SB "); 786 i++; 787 j = k = i; 788 while (j < length) { 789 if (pointer[j] == SE) { 790 if (j+1 == length) 791 break; 792 if (pointer[j+1] == SE) 793 j++; 794 else 795 break; 796 } 797 pointer[k++] = pointer[j++]; 798 } 799 printsub(0, &pointer[i], k - i); 800 if (i < length) { 801 output_data(" SE"); 802 i = j; 803 } else 804 i = j - 1; 805 806 output_data("\r\n"); 807 808 break; 809 810 default: 811 output_data(" %d", pointer[i]); 812 break; 813 } 814 } 815 break; 816 } 817 break; 818 } 819 820 case TELOPT_XDISPLOC: 821 output_data("X-DISPLAY-LOCATION "); 822 switch (pointer[1]) { 823 case TELQUAL_IS: 824 output_data("IS \"%.*s\"", length-2, (char *)pointer+2); 825 break; 826 case TELQUAL_SEND: 827 output_data("SEND"); 828 break; 829 default: 830 output_data("- unknown qualifier %d (0x%x).", 831 pointer[1], pointer[1]); 832 } 833 break; 834 835 case TELOPT_NEW_ENVIRON: 836 output_data("NEW-ENVIRON "); 837 goto env_common1; 838 case TELOPT_OLD_ENVIRON: 839 output_data("OLD-ENVIRON"); 840 env_common1: 841 switch (pointer[1]) { 842 case TELQUAL_IS: 843 output_data("IS "); 844 goto env_common; 845 case TELQUAL_SEND: 846 output_data("SEND "); 847 goto env_common; 848 case TELQUAL_INFO: 849 output_data("INFO "); 850 env_common: 851 { 852 int noquote = 2; 853 for (i = 2; i < length; i++ ) { 854 switch (pointer[i]) { 855 case NEW_ENV_VAR: 856 output_data("%s", "\" VAR " + noquote); 857 noquote = 2; 858 break; 859 860 case NEW_ENV_VALUE: 861 output_data("%s", "\" VALUE " + noquote); 862 noquote = 2; 863 break; 864 865 case ENV_ESC: 866 output_data("%s", "\" ESC " + noquote); 867 noquote = 2; 868 break; 869 870 case ENV_USERVAR: 871 output_data("%s", "\" USERVAR " + noquote); 872 noquote = 2; 873 break; 874 875 default: 876 if (isprint(pointer[i]) && pointer[i] != '"') { 877 if (noquote) { 878 output_data("\""); 879 noquote = 0; 880 } 881 output_data("%c", pointer[i]); 882 } else { 883 output_data("\" %03o " + noquote, 884 pointer[i]); 885 noquote = 2; 886 } 887 break; 888 } 889 } 890 if (!noquote) 891 output_data("\""); 892 break; 893 } 894 } 895 break; 896 897 #ifdef AUTHENTICATION 898 case TELOPT_AUTHENTICATION: 899 output_data("AUTHENTICATION"); 900 901 if (length < 2) { 902 output_data(" (empty suboption??\?)"); 903 break; 904 } 905 switch (pointer[1]) { 906 case TELQUAL_REPLY: 907 case TELQUAL_IS: 908 output_data(" %s ", (pointer[1] == TELQUAL_IS) ? 909 "IS" : "REPLY"); 910 if (AUTHTYPE_NAME_OK(pointer[2])) 911 output_data("%s ", AUTHTYPE_NAME(pointer[2])); 912 else 913 output_data("%d ", pointer[2]); 914 if (length < 3) { 915 output_data("(partial suboption??\?)"); 916 break; 917 } 918 output_data("%s|%s", 919 ((pointer[3] & AUTH_WHO_MASK) == AUTH_WHO_CLIENT) ? 920 "CLIENT" : "SERVER", 921 ((pointer[3] & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL) ? 922 "MUTUAL" : "ONE-WAY"); 923 924 { 925 char buf[512]; 926 auth_printsub(&pointer[1], length - 1, buf, sizeof(buf)); 927 output_data("%s", buf); 928 } 929 break; 930 931 case TELQUAL_SEND: 932 i = 2; 933 output_data(" SEND "); 934 while (i < length) { 935 if (AUTHTYPE_NAME_OK(pointer[i])) 936 output_data("%s ", AUTHTYPE_NAME(pointer[i])); 937 else 938 output_data("%d ", pointer[i]); 939 if (++i >= length) { 940 output_data("(partial suboption??\?)"); 941 break; 942 } 943 output_data("%s|%s ", 944 ((pointer[i] & AUTH_WHO_MASK) == AUTH_WHO_CLIENT) ? 945 "CLIENT" : "SERVER", 946 ((pointer[i] & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL) ? 947 "MUTUAL" : "ONE-WAY"); 948 ++i; 949 } 950 break; 951 952 case TELQUAL_NAME: 953 output_data(" NAME \"%.*s\"", length - 2, pointer + 2); 954 break; 955 956 default: 957 for (i = 2; i < length; i++) { 958 output_data(" ?%d?", pointer[i]); 959 } 960 break; 961 } 962 break; 963 #endif 964 965 #ifdef ENCRYPTION 966 case TELOPT_ENCRYPT: 967 output_data("ENCRYPT"); 968 if (length < 2) { 969 output_data(" (empty suboption??\?)"); 970 break; 971 } 972 switch (pointer[1]) { 973 case ENCRYPT_START: 974 output_data(" START"); 975 break; 976 977 case ENCRYPT_END: 978 output_data(" END"); 979 break; 980 981 case ENCRYPT_REQSTART: 982 output_data(" REQUEST-START"); 983 break; 984 985 case ENCRYPT_REQEND: 986 output_data(" REQUEST-END"); 987 break; 988 989 case ENCRYPT_IS: 990 case ENCRYPT_REPLY: 991 output_data(" %s ", (pointer[1] == ENCRYPT_IS) ? 992 "IS" : "REPLY"); 993 if (length < 3) { 994 output_data(" (partial suboption??\?)"); 995 break; 996 } 997 if (ENCTYPE_NAME_OK(pointer[2])) 998 output_data("%s ", ENCTYPE_NAME(pointer[2])); 999 else 1000 output_data(" %d (unknown)", pointer[2]); 1001 1002 { 1003 char buf[512]; 1004 encrypt_printsub(&pointer[1], length - 1, buf, sizeof(buf)); 1005 output_data("%s", buf); 1006 } 1007 break; 1008 1009 case ENCRYPT_SUPPORT: 1010 i = 2; 1011 output_data(" SUPPORT "); 1012 while (i < length) { 1013 if (ENCTYPE_NAME_OK(pointer[i])) 1014 output_data("%s ", ENCTYPE_NAME(pointer[i])); 1015 else 1016 output_data("%d ", pointer[i]); 1017 i++; 1018 } 1019 break; 1020 1021 case ENCRYPT_ENC_KEYID: 1022 output_data(" ENC_KEYID"); 1023 goto encommon; 1024 1025 case ENCRYPT_DEC_KEYID: 1026 output_data(" DEC_KEYID"); 1027 goto encommon; 1028 1029 default: 1030 output_data(" %d (unknown)", pointer[1]); 1031 encommon: 1032 for (i = 2; i < length; i++) { 1033 output_data(" %d", pointer[i]); 1034 } 1035 break; 1036 } 1037 break; 1038 #endif /* ENCRYPTION */ 1039 1040 default: 1041 if (TELOPT_OK(pointer[0])) 1042 output_data("%s (unknown)", TELOPT(pointer[0])); 1043 else 1044 output_data("%d (unknown)", pointer[i]); 1045 for (i = 1; i < length; i++) { 1046 output_data(" %d", pointer[i]); 1047 } 1048 break; 1049 } 1050 output_data("\r\n"); 1051 } 1052 1053 /* 1054 * Dump a data buffer in hex and ascii to the output data stream. 1055 */ 1056 void 1057 printdata(const char *tag, char *ptr, int cnt) 1058 { 1059 int i; 1060 char xbuf[30]; 1061 1062 while (cnt) { 1063 /* flush net output buffer if no room for new data) */ 1064 if ((&netobuf[BUFSIZ] - nfrontp) < 80) { 1065 netflush(); 1066 } 1067 1068 /* add a line of output */ 1069 output_data("%s: ", tag); 1070 for (i = 0; i < 20 && cnt; i++) { 1071 output_data("%02x", *ptr); 1072 if (isprint(*ptr)) { 1073 xbuf[i] = *ptr; 1074 } else { 1075 xbuf[i] = '.'; 1076 } 1077 if (i % 2) { 1078 output_data(" "); 1079 } 1080 cnt--; 1081 ptr++; 1082 } 1083 xbuf[i] = '\0'; 1084 output_data(" %s\r\n", xbuf ); 1085 } 1086 } 1087 #endif /* DIAGNOSTICS */ 1088