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. 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 #define PRINTOPTIONS 35 #include "telnetd.h" 36 37 RCSID("$Id: utility.c 15844 2005-08-08 13:36:16Z lha $"); 38 39 /* 40 * utility functions performing io related tasks 41 */ 42 43 /* 44 * ttloop 45 * 46 * A small subroutine to flush the network output buffer, get some 47 * data from the network, and pass it through the telnet state 48 * machine. We also flush the pty input buffer (by dropping its data) 49 * if it becomes too full. 50 * 51 * return 0 if OK or 1 if interrupted by a signal. 52 */ 53 54 int 55 ttloop(void) 56 { 57 DIAG(TD_REPORT, { 58 output_data("td: ttloop\r\n"); 59 }); 60 if (nfrontp-nbackp) 61 netflush(); 62 ncc = read(net, netibuf, sizeof netibuf); 63 if (ncc < 0) { 64 if (errno == EINTR) 65 return 1; 66 syslog(LOG_INFO, "ttloop: read: %m\n"); 67 exit(1); 68 } else if (ncc == 0) { 69 syslog(LOG_INFO, "ttloop: peer died\n"); 70 exit(1); 71 } 72 DIAG(TD_REPORT, { 73 output_data("td: ttloop read %d chars\r\n", ncc); 74 }); 75 netip = netibuf; 76 telrcv(); /* state machine */ 77 if (ncc > 0) { 78 pfrontp = pbackp = ptyobuf; 79 telrcv(); 80 } 81 return 0; 82 } /* end of ttloop */ 83 84 /* 85 * Check a descriptor to see if out of band data exists on it. 86 */ 87 int 88 stilloob(int s) 89 { 90 static struct timeval timeout = { 0 }; 91 fd_set excepts; 92 int value; 93 94 if (s >= FD_SETSIZE) 95 fatal(ourpty, "fd too large"); 96 97 do { 98 FD_ZERO(&excepts); 99 FD_SET(s, &excepts); 100 value = select(s+1, 0, 0, &excepts, &timeout); 101 } while ((value == -1) && (errno == EINTR)); 102 103 if (value < 0) { 104 fatalperror(ourpty, "select"); 105 } 106 if (FD_ISSET(s, &excepts)) { 107 return 1; 108 } else { 109 return 0; 110 } 111 } 112 113 void 114 ptyflush(void) 115 { 116 int n; 117 118 if ((n = pfrontp - pbackp) > 0) { 119 DIAG((TD_REPORT | TD_PTYDATA), { 120 output_data("td: ptyflush %d chars\r\n", n); 121 }); 122 DIAG(TD_PTYDATA, printdata("pd", pbackp, n)); 123 n = write(ourpty, pbackp, n); 124 } 125 if (n < 0) { 126 if (errno == EWOULDBLOCK || errno == EINTR) 127 return; 128 cleanup(0); 129 } 130 pbackp += n; 131 if (pbackp == pfrontp) 132 pbackp = pfrontp = ptyobuf; 133 } 134 135 /* 136 * nextitem() 137 * 138 * Return the address of the next "item" in the TELNET data 139 * stream. This will be the address of the next character if 140 * the current address is a user data character, or it will 141 * be the address of the character following the TELNET command 142 * if the current address is a TELNET IAC ("I Am a Command") 143 * character. 144 */ 145 char * 146 nextitem(char *current) 147 { 148 if ((*current&0xff) != IAC) { 149 return current+1; 150 } 151 switch (*(current+1)&0xff) { 152 case DO: 153 case DONT: 154 case WILL: 155 case WONT: 156 return current+3; 157 case SB:{ 158 /* loop forever looking for the SE */ 159 char *look = current+2; 160 161 for (;;) { 162 if ((*look++&0xff) == IAC) { 163 if ((*look++&0xff) == SE) { 164 return look; 165 } 166 } 167 } 168 } 169 default: 170 return current+2; 171 } 172 } 173 174 175 /* 176 * netclear() 177 * 178 * We are about to do a TELNET SYNCH operation. Clear 179 * the path to the network. 180 * 181 * Things are a bit tricky since we may have sent the first 182 * byte or so of a previous TELNET command into the network. 183 * So, we have to scan the network buffer from the beginning 184 * until we are up to where we want to be. 185 * 186 * A side effect of what we do, just to keep things 187 * simple, is to clear the urgent data pointer. The principal 188 * caller should be setting the urgent data pointer AFTER calling 189 * us in any case. 190 */ 191 void 192 netclear(void) 193 { 194 char *thisitem, *next; 195 char *good; 196 #define wewant(p) ((nfrontp > p) && ((*p&0xff) == IAC) && \ 197 ((*(p+1)&0xff) != EC) && ((*(p+1)&0xff) != EL)) 198 199 #ifdef ENCRYPTION 200 thisitem = nclearto > netobuf ? nclearto : netobuf; 201 #else 202 thisitem = netobuf; 203 #endif 204 205 while ((next = nextitem(thisitem)) <= nbackp) { 206 thisitem = next; 207 } 208 209 /* Now, thisitem is first before/at boundary. */ 210 211 #ifdef ENCRYPTION 212 good = nclearto > netobuf ? nclearto : netobuf; 213 #else 214 good = netobuf; /* where the good bytes go */ 215 #endif 216 217 while (nfrontp > thisitem) { 218 if (wewant(thisitem)) { 219 int length; 220 221 next = thisitem; 222 do { 223 next = nextitem(next); 224 } while (wewant(next) && (nfrontp > next)); 225 length = next-thisitem; 226 memmove(good, thisitem, length); 227 good += length; 228 thisitem = next; 229 } else { 230 thisitem = nextitem(thisitem); 231 } 232 } 233 234 nbackp = netobuf; 235 nfrontp = good; /* next byte to be sent */ 236 neturg = 0; 237 } /* end of netclear */ 238 239 extern int not42; 240 241 /* 242 * netflush 243 * Send as much data as possible to the network, 244 * handling requests for urgent data. 245 */ 246 void 247 netflush(void) 248 { 249 int n; 250 251 if ((n = nfrontp - nbackp) > 0) { 252 DIAG(TD_REPORT, 253 { n += output_data("td: netflush %d chars\r\n", n); 254 }); 255 #ifdef ENCRYPTION 256 if (encrypt_output) { 257 char *s = nclearto ? nclearto : nbackp; 258 if (nfrontp - s > 0) { 259 (*encrypt_output)((unsigned char *)s, nfrontp-s); 260 nclearto = nfrontp; 261 } 262 } 263 #endif 264 /* 265 * if no urgent data, or if the other side appears to be an 266 * old 4.2 client (and thus unable to survive TCP urgent data), 267 * write the entire buffer in non-OOB mode. 268 */ 269 #if 1 /* remove this to make it work between solaris 2.6 and linux */ 270 if ((neturg == 0) || (not42 == 0)) { 271 #endif 272 n = write(net, nbackp, n); /* normal write */ 273 #if 1 /* remove this to make it work between solaris 2.6 and linux */ 274 } else { 275 n = neturg - nbackp; 276 /* 277 * In 4.2 (and 4.3) systems, there is some question about 278 * what byte in a sendOOB operation is the "OOB" data. 279 * To make ourselves compatible, we only send ONE byte 280 * out of band, the one WE THINK should be OOB (though 281 * we really have more the TCP philosophy of urgent data 282 * rather than the Unix philosophy of OOB data). 283 */ 284 if (n > 1) { 285 n = send(net, nbackp, n-1, 0); /* send URGENT all by itself */ 286 } else { 287 n = send(net, nbackp, n, MSG_OOB); /* URGENT data */ 288 } 289 } 290 #endif 291 } 292 if (n < 0) { 293 if (errno == EWOULDBLOCK || errno == EINTR) 294 return; 295 cleanup(0); 296 } 297 nbackp += n; 298 #ifdef ENCRYPTION 299 if (nbackp > nclearto) 300 nclearto = 0; 301 #endif 302 if (nbackp >= neturg) { 303 neturg = 0; 304 } 305 if (nbackp == nfrontp) { 306 nbackp = nfrontp = netobuf; 307 #ifdef ENCRYPTION 308 nclearto = 0; 309 #endif 310 } 311 return; 312 } 313 314 315 /* 316 * writenet 317 * 318 * Just a handy little function to write a bit of raw data to the net. 319 * It will force a transmit of the buffer if necessary 320 * 321 * arguments 322 * ptr - A pointer to a character string to write 323 * len - How many bytes to write 324 */ 325 void 326 writenet(const void *ptr, size_t len) 327 { 328 /* flush buffer if no room for new data) */ 329 while ((&netobuf[BUFSIZ] - nfrontp) < len) { 330 /* if this fails, don't worry, buffer is a little big */ 331 netflush(); 332 } 333 if ((&netobuf[BUFSIZ] - nfrontp) < len) 334 abort(); 335 336 memmove(nfrontp, ptr, len); 337 nfrontp += len; 338 } 339 340 341 /* 342 * miscellaneous functions doing a variety of little jobs follow ... 343 */ 344 345 346 void fatal(int f, char *msg) 347 { 348 char buf[BUFSIZ]; 349 350 snprintf(buf, sizeof(buf), "telnetd: %s.\r\n", msg); 351 #ifdef ENCRYPTION 352 if (encrypt_output) { 353 /* 354 * Better turn off encryption first.... 355 * Hope it flushes... 356 */ 357 encrypt_send_end(); 358 netflush(); 359 } 360 #endif 361 write(f, buf, (int)strlen(buf)); 362 sleep(1); /*XXX*/ 363 exit(1); 364 } 365 366 void 367 fatalperror_errno(int f, const char *msg, int error) 368 { 369 char buf[BUFSIZ]; 370 371 snprintf(buf, sizeof(buf), "%s: %s", msg, strerror(error)); 372 fatal(f, buf); 373 } 374 375 void 376 fatalperror(int f, const char *msg) 377 { 378 fatalperror_errno(f, msg, errno); 379 } 380 381 char editedhost[32]; 382 383 void edithost(char *pat, char *host) 384 { 385 char *res = editedhost; 386 387 if (!pat) 388 pat = ""; 389 while (*pat) { 390 switch (*pat) { 391 392 case '#': 393 if (*host) 394 host++; 395 break; 396 397 case '@': 398 if (*host) 399 *res++ = *host++; 400 break; 401 402 default: 403 *res++ = *pat; 404 break; 405 } 406 if (res == &editedhost[sizeof editedhost - 1]) { 407 *res = '\0'; 408 return; 409 } 410 pat++; 411 } 412 if (*host) 413 strlcpy (res, host, 414 sizeof editedhost - (res - editedhost)); 415 else 416 *res = '\0'; 417 editedhost[sizeof editedhost - 1] = '\0'; 418 } 419 420 static char *putlocation; 421 422 void 423 putstr(char *s) 424 { 425 426 while (*s) 427 putchr(*s++); 428 } 429 430 void 431 putchr(int cc) 432 { 433 *putlocation++ = cc; 434 } 435 436 static char fmtstr[] = { "%l:%M%P on %A, %d %B %Y" }; 437 438 void putf(char *cp, char *where) 439 { 440 #ifdef HAVE_UNAME 441 struct utsname name; 442 #endif 443 char *slash; 444 time_t t; 445 char db[100]; 446 447 /* if we don't have uname, set these to sensible values */ 448 char *sysname = "Unix", 449 *machine = "", 450 *release = "", 451 *version = ""; 452 453 #ifdef HAVE_UNAME 454 uname(&name); 455 sysname=name.sysname; 456 machine=name.machine; 457 release=name.release; 458 version=name.version; 459 #endif 460 461 putlocation = where; 462 463 while (*cp) { 464 if (*cp != '%') { 465 putchr(*cp++); 466 continue; 467 } 468 switch (*++cp) { 469 470 case 't': 471 slash = strchr(line+1, '/'); 472 if (slash == (char *) 0) 473 putstr(line); 474 else 475 putstr(&slash[1]); 476 break; 477 478 case 'h': 479 putstr(editedhost); 480 break; 481 482 case 's': 483 putstr(sysname); 484 break; 485 486 case 'm': 487 putstr(machine); 488 break; 489 490 case 'r': 491 putstr(release); 492 break; 493 494 case 'v': 495 putstr(version); 496 break; 497 498 case 'd': 499 time(&t); 500 strftime(db, sizeof(db), fmtstr, localtime(&t)); 501 putstr(db); 502 break; 503 504 case '%': 505 putchr('%'); 506 break; 507 } 508 cp++; 509 } 510 } 511 512 #ifdef DIAGNOSTICS 513 /* 514 * Print telnet options and commands in plain text, if possible. 515 */ 516 void 517 printoption(char *fmt, int option) 518 { 519 if (TELOPT_OK(option)) 520 output_data("%s %s\r\n", 521 fmt, 522 TELOPT(option)); 523 else if (TELCMD_OK(option)) 524 output_data("%s %s\r\n", 525 fmt, 526 TELCMD(option)); 527 else 528 output_data("%s %d\r\n", 529 fmt, 530 option); 531 return; 532 } 533 534 void 535 printsub(int direction, unsigned char *pointer, int length) 536 /* '<' or '>' */ 537 /* where suboption data sits */ 538 /* length of suboption data */ 539 { 540 int i = 0; 541 unsigned char buf[512]; 542 543 if (!(diagnostic & TD_OPTIONS)) 544 return; 545 546 if (direction) { 547 output_data("td: %s suboption ", 548 direction == '<' ? "recv" : "send"); 549 if (length >= 3) { 550 int j; 551 552 i = pointer[length-2]; 553 j = pointer[length-1]; 554 555 if (i != IAC || j != SE) { 556 output_data("(terminated by "); 557 if (TELOPT_OK(i)) 558 output_data("%s ", 559 TELOPT(i)); 560 else if (TELCMD_OK(i)) 561 output_data("%s ", 562 TELCMD(i)); 563 else 564 output_data("%d ", 565 i); 566 if (TELOPT_OK(j)) 567 output_data("%s", 568 TELOPT(j)); 569 else if (TELCMD_OK(j)) 570 output_data("%s", 571 TELCMD(j)); 572 else 573 output_data("%d", 574 j); 575 output_data(", not IAC SE!) "); 576 } 577 } 578 length -= 2; 579 } 580 if (length < 1) { 581 output_data("(Empty suboption??\?)"); 582 return; 583 } 584 switch (pointer[0]) { 585 case TELOPT_TTYPE: 586 output_data("TERMINAL-TYPE "); 587 switch (pointer[1]) { 588 case TELQUAL_IS: 589 output_data("IS \"%.*s\"", 590 length-2, 591 (char *)pointer+2); 592 break; 593 case TELQUAL_SEND: 594 output_data("SEND"); 595 break; 596 default: 597 output_data("- unknown qualifier %d (0x%x).", 598 pointer[1], pointer[1]); 599 } 600 break; 601 case TELOPT_TSPEED: 602 output_data("TERMINAL-SPEED"); 603 if (length < 2) { 604 output_data(" (empty suboption??\?)"); 605 break; 606 } 607 switch (pointer[1]) { 608 case TELQUAL_IS: 609 output_data(" IS %.*s", length-2, (char *)pointer+2); 610 break; 611 default: 612 if (pointer[1] == 1) 613 output_data(" SEND"); 614 else 615 output_data(" %d (unknown)", pointer[1]); 616 for (i = 2; i < length; i++) { 617 output_data(" ?%d?", pointer[i]); 618 } 619 break; 620 } 621 break; 622 623 case TELOPT_LFLOW: 624 output_data("TOGGLE-FLOW-CONTROL"); 625 if (length < 2) { 626 output_data(" (empty suboption??\?)"); 627 break; 628 } 629 switch (pointer[1]) { 630 case LFLOW_OFF: 631 output_data(" OFF"); 632 break; 633 case LFLOW_ON: 634 output_data(" ON"); 635 break; 636 case LFLOW_RESTART_ANY: 637 output_data(" RESTART-ANY"); 638 break; 639 case LFLOW_RESTART_XON: 640 output_data(" RESTART-XON"); 641 break; 642 default: 643 output_data(" %d (unknown)", 644 pointer[1]); 645 } 646 for (i = 2; i < length; i++) { 647 output_data(" ?%d?", 648 pointer[i]); 649 } 650 break; 651 652 case TELOPT_NAWS: 653 output_data("NAWS"); 654 if (length < 2) { 655 output_data(" (empty suboption??\?)"); 656 break; 657 } 658 if (length == 2) { 659 output_data(" ?%d?", 660 pointer[1]); 661 break; 662 } 663 output_data(" %u %u(%u)", 664 pointer[1], 665 pointer[2], 666 (((unsigned int)pointer[1])<<8) + pointer[2]); 667 if (length == 4) { 668 output_data(" ?%d?", 669 pointer[3]); 670 break; 671 } 672 output_data(" %u %u(%u)", 673 pointer[3], 674 pointer[4], 675 (((unsigned int)pointer[3])<<8) + pointer[4]); 676 for (i = 5; i < length; i++) { 677 output_data(" ?%d?", 678 pointer[i]); 679 } 680 break; 681 682 case TELOPT_LINEMODE: 683 output_data("LINEMODE "); 684 if (length < 2) { 685 output_data(" (empty suboption??\?)"); 686 break; 687 } 688 switch (pointer[1]) { 689 case WILL: 690 output_data("WILL "); 691 goto common; 692 case WONT: 693 output_data("WONT "); 694 goto common; 695 case DO: 696 output_data("DO "); 697 goto common; 698 case DONT: 699 output_data("DONT "); 700 common: 701 if (length < 3) { 702 output_data("(no option??\?)"); 703 break; 704 } 705 switch (pointer[2]) { 706 case LM_FORWARDMASK: 707 output_data("Forward Mask"); 708 for (i = 3; i < length; i++) { 709 output_data(" %x", pointer[i]); 710 } 711 break; 712 default: 713 output_data("%d (unknown)", 714 pointer[2]); 715 for (i = 3; i < length; i++) { 716 output_data(" %d", 717 pointer[i]); 718 } 719 break; 720 } 721 break; 722 723 case LM_SLC: 724 output_data("SLC"); 725 for (i = 2; i < length - 2; i += 3) { 726 if (SLC_NAME_OK(pointer[i+SLC_FUNC])) 727 output_data(" %s", 728 SLC_NAME(pointer[i+SLC_FUNC])); 729 else 730 output_data(" %d", 731 pointer[i+SLC_FUNC]); 732 switch (pointer[i+SLC_FLAGS]&SLC_LEVELBITS) { 733 case SLC_NOSUPPORT: 734 output_data(" NOSUPPORT"); 735 break; 736 case SLC_CANTCHANGE: 737 output_data(" CANTCHANGE"); 738 break; 739 case SLC_VARIABLE: 740 output_data(" VARIABLE"); 741 break; 742 case SLC_DEFAULT: 743 output_data(" DEFAULT"); 744 break; 745 } 746 output_data("%s%s%s", 747 pointer[i+SLC_FLAGS]&SLC_ACK ? "|ACK" : "", 748 pointer[i+SLC_FLAGS]&SLC_FLUSHIN ? "|FLUSHIN" : "", 749 pointer[i+SLC_FLAGS]&SLC_FLUSHOUT ? "|FLUSHOUT" : ""); 750 if (pointer[i+SLC_FLAGS]& ~(SLC_ACK|SLC_FLUSHIN| 751 SLC_FLUSHOUT| SLC_LEVELBITS)) { 752 output_data("(0x%x)", 753 pointer[i+SLC_FLAGS]); 754 } 755 output_data(" %d;", 756 pointer[i+SLC_VALUE]); 757 if ((pointer[i+SLC_VALUE] == IAC) && 758 (pointer[i+SLC_VALUE+1] == IAC)) 759 i++; 760 } 761 for (; i < length; i++) { 762 output_data(" ?%d?", 763 pointer[i]); 764 } 765 break; 766 767 case LM_MODE: 768 output_data("MODE "); 769 if (length < 3) { 770 output_data("(no mode??\?)"); 771 break; 772 } 773 { 774 char tbuf[32]; 775 snprintf(tbuf, 776 sizeof(tbuf), 777 "%s%s%s%s%s", 778 pointer[2]&MODE_EDIT ? "|EDIT" : "", 779 pointer[2]&MODE_TRAPSIG ? "|TRAPSIG" : "", 780 pointer[2]&MODE_SOFT_TAB ? "|SOFT_TAB" : "", 781 pointer[2]&MODE_LIT_ECHO ? "|LIT_ECHO" : "", 782 pointer[2]&MODE_ACK ? "|ACK" : ""); 783 output_data("%s", 784 tbuf[1] ? &tbuf[1] : "0"); 785 } 786 if (pointer[2]&~(MODE_EDIT|MODE_TRAPSIG|MODE_ACK)) { 787 output_data(" (0x%x)", 788 pointer[2]); 789 } 790 for (i = 3; i < length; i++) { 791 output_data(" ?0x%x?", 792 pointer[i]); 793 } 794 break; 795 default: 796 output_data("%d (unknown)", 797 pointer[1]); 798 for (i = 2; i < length; i++) { 799 output_data(" %d", pointer[i]); 800 } 801 } 802 break; 803 804 case TELOPT_STATUS: { 805 char *cp; 806 int j, k; 807 808 output_data("STATUS"); 809 810 switch (pointer[1]) { 811 default: 812 if (pointer[1] == TELQUAL_SEND) 813 output_data(" SEND"); 814 else 815 output_data(" %d (unknown)", 816 pointer[1]); 817 for (i = 2; i < length; i++) { 818 output_data(" ?%d?", 819 pointer[i]); 820 } 821 break; 822 case TELQUAL_IS: 823 output_data(" IS\r\n"); 824 825 for (i = 2; i < length; i++) { 826 switch(pointer[i]) { 827 case DO: cp = "DO"; goto common2; 828 case DONT: cp = "DONT"; goto common2; 829 case WILL: cp = "WILL"; goto common2; 830 case WONT: cp = "WONT"; goto common2; 831 common2: 832 i++; 833 if (TELOPT_OK(pointer[i])) 834 output_data(" %s %s", 835 cp, 836 TELOPT(pointer[i])); 837 else 838 output_data(" %s %d", 839 cp, 840 pointer[i]); 841 842 output_data("\r\n"); 843 break; 844 845 case SB: 846 output_data(" SB "); 847 i++; 848 j = k = i; 849 while (j < length) { 850 if (pointer[j] == SE) { 851 if (j+1 == length) 852 break; 853 if (pointer[j+1] == SE) 854 j++; 855 else 856 break; 857 } 858 pointer[k++] = pointer[j++]; 859 } 860 printsub(0, &pointer[i], k - i); 861 if (i < length) { 862 output_data(" SE"); 863 i = j; 864 } else 865 i = j - 1; 866 867 output_data("\r\n"); 868 869 break; 870 871 default: 872 output_data(" %d", 873 pointer[i]); 874 break; 875 } 876 } 877 break; 878 } 879 break; 880 } 881 882 case TELOPT_XDISPLOC: 883 output_data("X-DISPLAY-LOCATION "); 884 switch (pointer[1]) { 885 case TELQUAL_IS: 886 output_data("IS \"%.*s\"", 887 length-2, 888 (char *)pointer+2); 889 break; 890 case TELQUAL_SEND: 891 output_data("SEND"); 892 break; 893 default: 894 output_data("- unknown qualifier %d (0x%x).", 895 pointer[1], pointer[1]); 896 } 897 break; 898 899 case TELOPT_NEW_ENVIRON: 900 output_data("NEW-ENVIRON "); 901 goto env_common1; 902 case TELOPT_OLD_ENVIRON: 903 output_data("OLD-ENVIRON"); 904 env_common1: 905 switch (pointer[1]) { 906 case TELQUAL_IS: 907 output_data("IS "); 908 goto env_common; 909 case TELQUAL_SEND: 910 output_data("SEND "); 911 goto env_common; 912 case TELQUAL_INFO: 913 output_data("INFO "); 914 env_common: 915 { 916 int noquote = 2; 917 for (i = 2; i < length; i++ ) { 918 switch (pointer[i]) { 919 case NEW_ENV_VAR: 920 output_data("\" VAR " + noquote); 921 noquote = 2; 922 break; 923 924 case NEW_ENV_VALUE: 925 output_data("\" VALUE " + noquote); 926 noquote = 2; 927 break; 928 929 case ENV_ESC: 930 output_data("\" ESC " + noquote); 931 noquote = 2; 932 break; 933 934 case ENV_USERVAR: 935 output_data("\" USERVAR " + noquote); 936 noquote = 2; 937 break; 938 939 default: 940 if (isprint(pointer[i]) && pointer[i] != '"') { 941 if (noquote) { 942 output_data ("\""); 943 noquote = 0; 944 } 945 output_data ("%c", pointer[i]); 946 } else { 947 output_data("\" %03o " + noquote, 948 pointer[i]); 949 noquote = 2; 950 } 951 break; 952 } 953 } 954 if (!noquote) 955 output_data ("\""); 956 break; 957 } 958 } 959 break; 960 961 #ifdef AUTHENTICATION 962 case TELOPT_AUTHENTICATION: 963 output_data("AUTHENTICATION"); 964 965 if (length < 2) { 966 output_data(" (empty suboption??\?)"); 967 break; 968 } 969 switch (pointer[1]) { 970 case TELQUAL_REPLY: 971 case TELQUAL_IS: 972 output_data(" %s ", 973 (pointer[1] == TELQUAL_IS) ? 974 "IS" : "REPLY"); 975 if (AUTHTYPE_NAME_OK(pointer[2])) 976 output_data("%s ", 977 AUTHTYPE_NAME(pointer[2])); 978 else 979 output_data("%d ", 980 pointer[2]); 981 if (length < 3) { 982 output_data("(partial suboption??\?)"); 983 break; 984 } 985 output_data("%s|%s", 986 ((pointer[3] & AUTH_WHO_MASK) == AUTH_WHO_CLIENT) ? 987 "CLIENT" : "SERVER", 988 ((pointer[3] & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL) ? 989 "MUTUAL" : "ONE-WAY"); 990 991 auth_printsub(&pointer[1], length - 1, buf, sizeof(buf)); 992 output_data("%s", 993 buf); 994 break; 995 996 case TELQUAL_SEND: 997 i = 2; 998 output_data(" SEND "); 999 while (i < length) { 1000 if (AUTHTYPE_NAME_OK(pointer[i])) 1001 output_data("%s ", 1002 AUTHTYPE_NAME(pointer[i])); 1003 else 1004 output_data("%d ", 1005 pointer[i]); 1006 if (++i >= length) { 1007 output_data("(partial suboption??\?)"); 1008 break; 1009 } 1010 output_data("%s|%s ", 1011 ((pointer[i] & AUTH_WHO_MASK) == AUTH_WHO_CLIENT) ? 1012 "CLIENT" : "SERVER", 1013 ((pointer[i] & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL) ? 1014 "MUTUAL" : "ONE-WAY"); 1015 ++i; 1016 } 1017 break; 1018 1019 case TELQUAL_NAME: 1020 i = 2; 1021 output_data(" NAME \"%.*s\"", 1022 length - 2, 1023 pointer); 1024 break; 1025 1026 default: 1027 for (i = 2; i < length; i++) { 1028 output_data(" ?%d?", 1029 pointer[i]); 1030 } 1031 break; 1032 } 1033 break; 1034 #endif 1035 1036 #ifdef ENCRYPTION 1037 case TELOPT_ENCRYPT: 1038 output_data("ENCRYPT"); 1039 if (length < 2) { 1040 output_data(" (empty suboption?)"); 1041 break; 1042 } 1043 switch (pointer[1]) { 1044 case ENCRYPT_START: 1045 output_data(" START"); 1046 break; 1047 1048 case ENCRYPT_END: 1049 output_data(" END"); 1050 break; 1051 1052 case ENCRYPT_REQSTART: 1053 output_data(" REQUEST-START"); 1054 break; 1055 1056 case ENCRYPT_REQEND: 1057 output_data(" REQUEST-END"); 1058 break; 1059 1060 case ENCRYPT_IS: 1061 case ENCRYPT_REPLY: 1062 output_data(" %s ", 1063 (pointer[1] == ENCRYPT_IS) ? 1064 "IS" : "REPLY"); 1065 if (length < 3) { 1066 output_data(" (partial suboption?)"); 1067 break; 1068 } 1069 if (ENCTYPE_NAME_OK(pointer[2])) 1070 output_data("%s ", 1071 ENCTYPE_NAME(pointer[2])); 1072 else 1073 output_data(" %d (unknown)", 1074 pointer[2]); 1075 1076 encrypt_printsub(&pointer[1], length - 1, buf, sizeof(buf)); 1077 output_data("%s", 1078 buf); 1079 break; 1080 1081 case ENCRYPT_SUPPORT: 1082 i = 2; 1083 output_data(" SUPPORT "); 1084 while (i < length) { 1085 if (ENCTYPE_NAME_OK(pointer[i])) 1086 output_data("%s ", 1087 ENCTYPE_NAME(pointer[i])); 1088 else 1089 output_data("%d ", 1090 pointer[i]); 1091 i++; 1092 } 1093 break; 1094 1095 case ENCRYPT_ENC_KEYID: 1096 output_data(" ENC_KEYID %d", pointer[1]); 1097 goto encommon; 1098 1099 case ENCRYPT_DEC_KEYID: 1100 output_data(" DEC_KEYID %d", pointer[1]); 1101 goto encommon; 1102 1103 default: 1104 output_data(" %d (unknown)", pointer[1]); 1105 encommon: 1106 for (i = 2; i < length; i++) { 1107 output_data(" %d", pointer[i]); 1108 } 1109 break; 1110 } 1111 break; 1112 #endif 1113 1114 default: 1115 if (TELOPT_OK(pointer[0])) 1116 output_data("%s (unknown)", 1117 TELOPT(pointer[0])); 1118 else 1119 output_data("%d (unknown)", 1120 pointer[i]); 1121 for (i = 1; i < length; i++) { 1122 output_data(" %d", pointer[i]); 1123 } 1124 break; 1125 } 1126 output_data("\r\n"); 1127 } 1128 1129 /* 1130 * Dump a data buffer in hex and ascii to the output data stream. 1131 */ 1132 void 1133 printdata(char *tag, char *ptr, int cnt) 1134 { 1135 int i; 1136 char xbuf[30]; 1137 1138 while (cnt) { 1139 /* flush net output buffer if no room for new data) */ 1140 if ((&netobuf[BUFSIZ] - nfrontp) < 80) { 1141 netflush(); 1142 } 1143 1144 /* add a line of output */ 1145 output_data("%s: ", tag); 1146 for (i = 0; i < 20 && cnt; i++) { 1147 output_data("%02x", *ptr); 1148 if (isprint((unsigned char)*ptr)) { 1149 xbuf[i] = *ptr; 1150 } else { 1151 xbuf[i] = '.'; 1152 } 1153 if (i % 2) { 1154 output_data(" "); 1155 } 1156 cnt--; 1157 ptr++; 1158 } 1159 xbuf[i] = '\0'; 1160 output_data(" %s\r\n", xbuf); 1161 } 1162 } 1163 #endif /* DIAGNOSTICS */ 1164