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 * @(#)utility.c 8.4 (Berkeley) 5/30/95 30 * $FreeBSD: src/crypto/telnet/telnetd/utility.c,v 1.5.2.4 2002/04/13 10:59:09 markm Exp $ 31 */ 32 33 #ifdef __FreeBSD__ 34 #include <locale.h> 35 #include <sys/utsname.h> 36 #endif 37 #include <string.h> 38 #define PRINTOPTIONS 39 #include "telnetd.h" 40 41 #ifdef AUTHENTICATION 42 #include <libtelnet/auth.h> 43 #endif 44 #ifdef ENCRYPTION 45 #include <libtelnet/encrypt.h> 46 #endif 47 48 /* 49 * utility functions performing io related tasks 50 */ 51 52 /* 53 * ttloop 54 * 55 * A small subroutine to flush the network output buffer, get some data 56 * from the network, and pass it through the telnet state machine. We 57 * also flush the pty input buffer (by dropping its data) if it becomes 58 * too full. 59 */ 60 61 void 62 ttloop(void) 63 { 64 65 DIAG(TD_REPORT, output_data("td: ttloop\r\n")); 66 if (nfrontp - nbackp > 0) { 67 netflush(); 68 } 69 ncc = read(net, netibuf, sizeof netibuf); 70 if (ncc < 0) { 71 syslog(LOG_INFO, "ttloop: read: %m"); 72 exit(1); 73 } else if (ncc == 0) { 74 syslog(LOG_INFO, "ttloop: peer died: %m"); 75 exit(1); 76 } 77 DIAG(TD_REPORT, output_data("td: ttloop read %d chars\r\n", ncc)); 78 netip = netibuf; 79 telrcv(); /* state machine */ 80 if (ncc > 0) { 81 pfrontp = pbackp = ptyobuf; 82 telrcv(); 83 } 84 } /* end of ttloop */ 85 86 /* 87 * Check a descriptor to see if out of band data exists on it. 88 */ 89 int 90 stilloob(int s) 91 { 92 static struct timeval timeout = { 0, 0 }; 93 fd_set excepts; 94 int value; 95 96 do { 97 FD_ZERO(&excepts); 98 FD_SET(s, &excepts); 99 memset((char *)&timeout, 0, sizeof timeout); 100 value = select(s+1, NULL, NULL, &excepts, &timeout); 101 } while ((value == -1) && (errno == EINTR)); 102 103 if (value < 0) { 104 fatalperror(pty, "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 DIAG(TD_PTYDATA, printdata("pd", pbackp, n)); 122 n = write(pty, pbackp, n); 123 } 124 if (n < 0) { 125 if (errno == EWOULDBLOCK || errno == EINTR) 126 return; 127 cleanup(0); 128 } 129 pbackp += n; 130 if (pbackp == pfrontp) 131 pbackp = pfrontp = ptyobuf; 132 } 133 134 /* 135 * nextitem() 136 * 137 * Return the address of the next "item" in the TELNET data 138 * stream. This will be the address of the next character if 139 * the current address is a user data character, or it will 140 * be the address of the character following the TELNET command 141 * if the current address is a TELNET IAC ("I Am a Command") 142 * character. 143 */ 144 static char * 145 nextitem(char *current) 146 { 147 if ((*current&0xff) != IAC) { 148 return current+1; 149 } 150 switch (*(current+1)&0xff) { 151 case DO: 152 case DONT: 153 case WILL: 154 case WONT: 155 return current+3; 156 case SB: /* loop forever looking for the SE */ 157 { 158 char *look = current+2; 159 160 for (;;) { 161 if ((*look++&0xff) == IAC) { 162 if ((*look++&0xff) == SE) { 163 return look; 164 } 165 } 166 } 167 } 168 default: 169 return current+2; 170 } 171 } /* end of nextitem */ 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(void) 191 { 192 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 #ifdef ENCRYPTION 198 thisitem = nclearto > netobuf ? nclearto : netobuf; 199 #else /* ENCRYPTION */ 200 thisitem = netobuf; 201 #endif /* ENCRYPTION */ 202 203 while ((next = nextitem(thisitem)) <= nbackp) { 204 thisitem = next; 205 } 206 207 /* Now, thisitem is first before/at boundary. */ 208 209 #ifdef ENCRYPTION 210 good = nclearto > netobuf ? nclearto : netobuf; 211 #else /* ENCRYPTION */ 212 good = netobuf; /* where the good bytes go */ 213 #endif /* ENCRYPTION */ 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 memmove(good, thisitem, 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(void) 244 { 245 int n; 246 extern int not42; 247 248 while ((n = nfrontp - nbackp) > 0) { 249 #if 0 250 /* XXX This causes output_data() to recurse and die */ 251 DIAG(TD_REPORT, { 252 n += output_data("td: netflush %d chars\r\n", n); 253 }); 254 #endif 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 /* ENCRYPTION */ 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 ((neturg == 0) || (not42 == 0)) { 270 n = write(net, nbackp, n); /* normal write */ 271 } else { 272 n = neturg - nbackp; 273 /* 274 * In 4.2 (and 4.3) systems, there is some question about 275 * what byte in a sendOOB operation is the "OOB" data. 276 * To make ourselves compatible, we only send ONE byte 277 * out of band, the one WE THINK should be OOB (though 278 * we really have more the TCP philosophy of urgent data 279 * rather than the Unix philosophy of OOB data). 280 */ 281 if (n > 1) { 282 n = send(net, nbackp, n-1, 0); /* send URGENT all by itself */ 283 } else { 284 n = send(net, nbackp, n, MSG_OOB); /* URGENT data */ 285 } 286 } 287 if (n == -1) { 288 if (errno == EWOULDBLOCK || errno == EINTR) 289 continue; 290 cleanup(0); 291 /* NOTREACHED */ 292 } 293 nbackp += n; 294 #ifdef ENCRYPTION 295 if (nbackp > nclearto) 296 nclearto = 0; 297 #endif /* ENCRYPTION */ 298 if (nbackp >= neturg) { 299 neturg = 0; 300 } 301 if (nbackp == nfrontp) { 302 nbackp = nfrontp = netobuf; 303 #ifdef ENCRYPTION 304 nclearto = 0; 305 #endif /* ENCRYPTION */ 306 } 307 } 308 return; 309 } /* end of netflush */ 310 311 312 /* 313 * miscellaneous functions doing a variety of little jobs follow ... 314 */ 315 316 317 void 318 fatal(int f, const char *msg) 319 { 320 char buf[BUFSIZ]; 321 322 (void) snprintf(buf, sizeof(buf), "telnetd: %s.\r\n", msg); 323 #ifdef ENCRYPTION 324 if (encrypt_output) { 325 /* 326 * Better turn off encryption first.... 327 * Hope it flushes... 328 */ 329 encrypt_send_end(); 330 netflush(); 331 } 332 #endif /* ENCRYPTION */ 333 (void) write(f, buf, (int)strlen(buf)); 334 sleep(1); /*XXX*/ 335 exit(1); 336 } 337 338 void 339 fatalperror(int f, const char *msg) 340 { 341 char buf[BUFSIZ]; 342 343 (void) snprintf(buf, sizeof(buf), "%s: %s", msg, strerror(errno)); 344 fatal(f, buf); 345 } 346 347 char editedhost[32]; 348 349 void 350 edithost(char *pat, char *host) 351 { 352 char *res = editedhost; 353 354 if (!pat) 355 pat = strdup(""); 356 while (*pat) { 357 switch (*pat) { 358 359 case '#': 360 if (*host) 361 host++; 362 break; 363 364 case '@': 365 if (*host) 366 *res++ = *host++; 367 break; 368 369 default: 370 *res++ = *pat; 371 break; 372 } 373 if (res == &editedhost[sizeof editedhost - 1]) { 374 *res = '\0'; 375 return; 376 } 377 pat++; 378 } 379 if (*host) 380 (void) strncpy(res, host, 381 sizeof editedhost - (res - editedhost) -1); 382 else 383 *res = '\0'; 384 editedhost[sizeof editedhost - 1] = '\0'; 385 } 386 387 static char *putlocation; 388 389 static void 390 putstr(const char *s) 391 { 392 393 while (*s) 394 putchr(*s++); 395 } 396 397 void 398 putchr(int cc) 399 { 400 *putlocation++ = cc; 401 } 402 403 #ifdef __FreeBSD__ 404 static char fmtstr[] = { "%+" }; 405 #else 406 static char fmtstr[] = { "%l:%M%P on %A, %d %B %Y" }; 407 #endif 408 409 void 410 putf(char *cp, char *where) 411 { 412 char *slash; 413 time_t t; 414 char db[100]; 415 #ifdef __FreeBSD__ 416 static struct utsname kerninfo; 417 418 if (!*kerninfo.sysname) 419 uname(&kerninfo); 420 #endif 421 422 putlocation = where; 423 424 while (*cp) { 425 if (*cp =='\n') { 426 putstr("\r\n"); 427 cp++; 428 continue; 429 } else if (*cp != '%') { 430 putchr(*cp++); 431 continue; 432 } 433 switch (*++cp) { 434 435 case 't': 436 #ifdef STREAMSPTY 437 /* names are like /dev/pts/2 -- we want pts/2 */ 438 slash = strchr(line+1, '/'); 439 #else 440 slash = strrchr(line, '/'); 441 #endif 442 if (slash == (char *) 0) 443 putstr(line); 444 else 445 putstr(&slash[1]); 446 break; 447 448 case 'h': 449 putstr(editedhost); 450 break; 451 452 case 'd': 453 #ifdef __FreeBSD__ 454 setlocale(LC_TIME, ""); 455 #endif 456 (void)time(&t); 457 (void)strftime(db, sizeof(db), fmtstr, localtime(&t)); 458 putstr(db); 459 break; 460 461 #ifdef __FreeBSD__ 462 case 's': 463 putstr(kerninfo.sysname); 464 break; 465 466 case 'm': 467 putstr(kerninfo.machine); 468 break; 469 470 case 'r': 471 putstr(kerninfo.release); 472 break; 473 474 case 'v': 475 putstr(kerninfo.version); 476 break; 477 #endif 478 479 case '%': 480 putchr('%'); 481 break; 482 } 483 cp++; 484 } 485 } 486 487 #ifdef DIAGNOSTICS 488 /* 489 * Print telnet options and commands in plain text, if possible. 490 */ 491 void 492 printoption(const char *fmt, int option) 493 { 494 if (TELOPT_OK(option)) 495 output_data("%s %s\r\n", fmt, TELOPT(option)); 496 else if (TELCMD_OK(option)) 497 output_data("%s %s\r\n", fmt, TELCMD(option)); 498 else 499 output_data("%s %d\r\n", fmt, option); 500 return; 501 } 502 503 void 504 printsub(char direction, unsigned char *pointer, int length) 505 { 506 int i = 0; 507 508 if (!(diagnostic & TD_OPTIONS)) 509 return; 510 511 if (direction) { 512 output_data("td: %s suboption ", 513 direction == '<' ? "recv" : "send"); 514 if (length >= 3) { 515 int j; 516 517 i = pointer[length-2]; 518 j = pointer[length-1]; 519 520 if (i != IAC || j != SE) { 521 output_data("(terminated by "); 522 if (TELOPT_OK(i)) 523 output_data("%s ", TELOPT(i)); 524 else if (TELCMD_OK(i)) 525 output_data("%s ", TELCMD(i)); 526 else 527 output_data("%d ", i); 528 if (TELOPT_OK(j)) 529 output_data("%s", TELOPT(j)); 530 else if (TELCMD_OK(j)) 531 output_data("%s", TELCMD(j)); 532 else 533 output_data("%d", j); 534 output_data(", not IAC SE!) "); 535 } 536 } 537 length -= 2; 538 } 539 if (length < 1) { 540 output_data("(Empty suboption??\?)"); 541 return; 542 } 543 switch (pointer[0]) { 544 case TELOPT_TTYPE: 545 output_data("TERMINAL-TYPE "); 546 switch (pointer[1]) { 547 case TELQUAL_IS: 548 output_data("IS \"%.*s\"", length-2, (char *)pointer+2); 549 break; 550 case TELQUAL_SEND: 551 output_data("SEND"); 552 break; 553 default: 554 output_data( 555 "- unknown qualifier %d (0x%x).", 556 pointer[1], pointer[1]); 557 } 558 break; 559 case TELOPT_TSPEED: 560 output_data("TERMINAL-SPEED"); 561 if (length < 2) { 562 output_data(" (empty suboption??\?)"); 563 break; 564 } 565 switch (pointer[1]) { 566 case TELQUAL_IS: 567 output_data(" IS %.*s", length-2, (char *)pointer+2); 568 break; 569 default: 570 if (pointer[1] == 1) 571 output_data(" SEND"); 572 else 573 output_data(" %d (unknown)", pointer[1]); 574 for (i = 2; i < length; i++) { 575 output_data(" ?%d?", pointer[i]); 576 } 577 break; 578 } 579 break; 580 581 case TELOPT_LFLOW: 582 output_data("TOGGLE-FLOW-CONTROL"); 583 if (length < 2) { 584 output_data(" (empty suboption??\?)"); 585 break; 586 } 587 switch (pointer[1]) { 588 case LFLOW_OFF: 589 output_data(" OFF"); break; 590 case LFLOW_ON: 591 output_data(" ON"); break; 592 case LFLOW_RESTART_ANY: 593 output_data(" RESTART-ANY"); break; 594 case LFLOW_RESTART_XON: 595 output_data(" RESTART-XON"); break; 596 default: 597 output_data(" %d (unknown)", pointer[1]); 598 } 599 for (i = 2; i < length; i++) { 600 output_data(" ?%d?", pointer[i]); 601 } 602 break; 603 604 case TELOPT_NAWS: 605 output_data("NAWS"); 606 if (length < 2) { 607 output_data(" (empty suboption??\?)"); 608 break; 609 } 610 if (length == 2) { 611 output_data(" ?%d?", pointer[1]); 612 break; 613 } 614 output_data(" %d %d (%d)", 615 pointer[1], pointer[2], 616 (int)((((unsigned int)pointer[1])<<8)|((unsigned int)pointer[2]))); 617 if (length == 4) { 618 output_data(" ?%d?", pointer[3]); 619 break; 620 } 621 output_data(" %d %d (%d)", 622 pointer[3], pointer[4], 623 (int)((((unsigned int)pointer[3])<<8)|((unsigned int)pointer[4]))); 624 for (i = 5; i < length; i++) { 625 output_data(" ?%d?", pointer[i]); 626 } 627 break; 628 629 case TELOPT_LINEMODE: 630 output_data("LINEMODE "); 631 if (length < 2) { 632 output_data(" (empty suboption??\?)"); 633 break; 634 } 635 switch (pointer[1]) { 636 case WILL: 637 output_data("WILL "); 638 goto common; 639 case WONT: 640 output_data("WONT "); 641 goto common; 642 case DO: 643 output_data("DO "); 644 goto common; 645 case DONT: 646 output_data("DONT "); 647 common: 648 if (length < 3) { 649 output_data("(no option??\?)"); 650 break; 651 } 652 switch (pointer[2]) { 653 case LM_FORWARDMASK: 654 output_data("Forward Mask"); 655 for (i = 3; i < length; i++) { 656 output_data(" %x", pointer[i]); 657 } 658 break; 659 default: 660 output_data("%d (unknown)", pointer[2]); 661 for (i = 3; i < length; i++) { 662 output_data(" %d", pointer[i]); 663 } 664 break; 665 } 666 break; 667 668 case LM_SLC: 669 output_data("SLC"); 670 for (i = 2; i < length - 2; i += 3) { 671 if (SLC_NAME_OK(pointer[i+SLC_FUNC])) 672 output_data(" %s", SLC_NAME(pointer[i+SLC_FUNC])); 673 else 674 output_data(" %d", pointer[i+SLC_FUNC]); 675 switch (pointer[i+SLC_FLAGS]&SLC_LEVELBITS) { 676 case SLC_NOSUPPORT: 677 output_data(" NOSUPPORT"); break; 678 case SLC_CANTCHANGE: 679 output_data(" CANTCHANGE"); break; 680 case SLC_VARIABLE: 681 output_data(" VARIABLE"); break; 682 case SLC_DEFAULT: 683 output_data(" DEFAULT"); break; 684 } 685 output_data("%s%s%s", 686 pointer[i+SLC_FLAGS]&SLC_ACK ? "|ACK" : "", 687 pointer[i+SLC_FLAGS]&SLC_FLUSHIN ? "|FLUSHIN" : "", 688 pointer[i+SLC_FLAGS]&SLC_FLUSHOUT ? "|FLUSHOUT" : ""); 689 if (pointer[i+SLC_FLAGS]& ~(SLC_ACK|SLC_FLUSHIN| 690 SLC_FLUSHOUT| SLC_LEVELBITS)) { 691 output_data("(0x%x)", pointer[i+SLC_FLAGS]); 692 } 693 output_data(" %d;", pointer[i+SLC_VALUE]); 694 if ((pointer[i+SLC_VALUE] == IAC) && 695 (pointer[i+SLC_VALUE+1] == IAC)) 696 i++; 697 } 698 for (; i < length; i++) { 699 output_data(" ?%d?", pointer[i]); 700 } 701 break; 702 703 case LM_MODE: 704 output_data("MODE "); 705 if (length < 3) { 706 output_data("(no mode??\?)"); 707 break; 708 } 709 { 710 char tbuf[32]; 711 sprintf(tbuf, "%s%s%s%s%s", 712 pointer[2]&MODE_EDIT ? "|EDIT" : "", 713 pointer[2]&MODE_TRAPSIG ? "|TRAPSIG" : "", 714 pointer[2]&MODE_SOFT_TAB ? "|SOFT_TAB" : "", 715 pointer[2]&MODE_LIT_ECHO ? "|LIT_ECHO" : "", 716 pointer[2]&MODE_ACK ? "|ACK" : ""); 717 output_data("%s", tbuf[1] ? &tbuf[1] : "0"); 718 } 719 if (pointer[2]&~(MODE_EDIT|MODE_TRAPSIG|MODE_ACK)) { 720 output_data(" (0x%x)", pointer[2]); 721 } 722 for (i = 3; i < length; i++) { 723 output_data(" ?0x%x?", pointer[i]); 724 } 725 break; 726 default: 727 output_data("%d (unknown)", pointer[1]); 728 for (i = 2; i < length; i++) { 729 output_data(" %d", pointer[i]); 730 } 731 } 732 break; 733 734 case TELOPT_STATUS: { 735 const char *cp; 736 int j, k; 737 738 output_data("STATUS"); 739 740 switch (pointer[1]) { 741 default: 742 if (pointer[1] == TELQUAL_SEND) 743 output_data(" SEND"); 744 else 745 output_data(" %d (unknown)", pointer[1]); 746 for (i = 2; i < length; i++) { 747 output_data(" ?%d?", pointer[i]); 748 } 749 break; 750 case TELQUAL_IS: 751 output_data(" IS\r\n"); 752 753 for (i = 2; i < length; i++) { 754 switch(pointer[i]) { 755 case DO: cp = "DO"; goto common2; 756 case DONT: cp = "DONT"; goto common2; 757 case WILL: cp = "WILL"; goto common2; 758 case WONT: cp = "WONT"; goto common2; 759 common2: 760 i++; 761 if (TELOPT_OK(pointer[i])) 762 output_data(" %s %s", cp, TELOPT(pointer[i])); 763 else 764 output_data(" %s %d", cp, pointer[i]); 765 766 output_data("\r\n"); 767 break; 768 769 case SB: 770 output_data(" SB "); 771 i++; 772 j = k = i; 773 while (j < length) { 774 if (pointer[j] == SE) { 775 if (j+1 == length) 776 break; 777 if (pointer[j+1] == SE) 778 j++; 779 else 780 break; 781 } 782 pointer[k++] = pointer[j++]; 783 } 784 printsub(0, &pointer[i], k - i); 785 if (i < length) { 786 output_data(" SE"); 787 i = j; 788 } else 789 i = j - 1; 790 791 output_data("\r\n"); 792 793 break; 794 795 default: 796 output_data(" %d", pointer[i]); 797 break; 798 } 799 } 800 break; 801 } 802 break; 803 } 804 805 case TELOPT_XDISPLOC: 806 output_data("X-DISPLAY-LOCATION "); 807 switch (pointer[1]) { 808 case TELQUAL_IS: 809 output_data("IS \"%.*s\"", length-2, (char *)pointer+2); 810 break; 811 case TELQUAL_SEND: 812 output_data("SEND"); 813 break; 814 default: 815 output_data("- unknown qualifier %d (0x%x).", 816 pointer[1], pointer[1]); 817 } 818 break; 819 820 case TELOPT_NEW_ENVIRON: 821 output_data("NEW-ENVIRON "); 822 goto env_common1; 823 case TELOPT_OLD_ENVIRON: 824 output_data("OLD-ENVIRON"); 825 env_common1: 826 switch (pointer[1]) { 827 case TELQUAL_IS: 828 output_data("IS "); 829 goto env_common; 830 case TELQUAL_SEND: 831 output_data("SEND "); 832 goto env_common; 833 case TELQUAL_INFO: 834 output_data("INFO "); 835 env_common: 836 { 837 int noquote = 2; 838 for (i = 2; i < length; i++ ) { 839 switch (pointer[i]) { 840 case NEW_ENV_VAR: 841 output_data("%s", "\" VAR " + noquote); 842 noquote = 2; 843 break; 844 845 case NEW_ENV_VALUE: 846 output_data("%s", "\" VALUE " + noquote); 847 noquote = 2; 848 break; 849 850 case ENV_ESC: 851 output_data("%s", "\" ESC " + noquote); 852 noquote = 2; 853 break; 854 855 case ENV_USERVAR: 856 output_data("%s", "\" USERVAR " + noquote); 857 noquote = 2; 858 break; 859 860 default: 861 if (isprint(pointer[i]) && pointer[i] != '"') { 862 if (noquote) { 863 output_data("\""); 864 noquote = 0; 865 } 866 output_data("%c", pointer[i]); 867 } else { 868 output_data("\" %03o " + noquote, 869 pointer[i]); 870 noquote = 2; 871 } 872 break; 873 } 874 } 875 if (!noquote) 876 output_data("\""); 877 break; 878 } 879 } 880 break; 881 882 #ifdef AUTHENTICATION 883 case TELOPT_AUTHENTICATION: 884 output_data("AUTHENTICATION"); 885 886 if (length < 2) { 887 output_data(" (empty suboption??\?)"); 888 break; 889 } 890 switch (pointer[1]) { 891 case TELQUAL_REPLY: 892 case TELQUAL_IS: 893 output_data(" %s ", (pointer[1] == TELQUAL_IS) ? 894 "IS" : "REPLY"); 895 if (AUTHTYPE_NAME_OK(pointer[2])) 896 output_data("%s ", AUTHTYPE_NAME(pointer[2])); 897 else 898 output_data("%d ", pointer[2]); 899 if (length < 3) { 900 output_data("(partial suboption??\?)"); 901 break; 902 } 903 output_data("%s|%s", 904 ((pointer[3] & AUTH_WHO_MASK) == AUTH_WHO_CLIENT) ? 905 "CLIENT" : "SERVER", 906 ((pointer[3] & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL) ? 907 "MUTUAL" : "ONE-WAY"); 908 909 { 910 char buf[512]; 911 auth_printsub(&pointer[1], length - 1, buf, sizeof(buf)); 912 output_data("%s", buf); 913 } 914 break; 915 916 case TELQUAL_SEND: 917 i = 2; 918 output_data(" SEND "); 919 while (i < length) { 920 if (AUTHTYPE_NAME_OK(pointer[i])) 921 output_data("%s ", AUTHTYPE_NAME(pointer[i])); 922 else 923 output_data("%d ", pointer[i]); 924 if (++i >= length) { 925 output_data("(partial suboption??\?)"); 926 break; 927 } 928 output_data("%s|%s ", 929 ((pointer[i] & AUTH_WHO_MASK) == AUTH_WHO_CLIENT) ? 930 "CLIENT" : "SERVER", 931 ((pointer[i] & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL) ? 932 "MUTUAL" : "ONE-WAY"); 933 ++i; 934 } 935 break; 936 937 case TELQUAL_NAME: 938 output_data(" NAME \"%.*s\"", length - 2, pointer + 2); 939 break; 940 941 default: 942 for (i = 2; i < length; i++) { 943 output_data(" ?%d?", pointer[i]); 944 } 945 break; 946 } 947 break; 948 #endif 949 950 #ifdef ENCRYPTION 951 case TELOPT_ENCRYPT: 952 output_data("ENCRYPT"); 953 if (length < 2) { 954 output_data(" (empty suboption??\?)"); 955 break; 956 } 957 switch (pointer[1]) { 958 case ENCRYPT_START: 959 output_data(" START"); 960 break; 961 962 case ENCRYPT_END: 963 output_data(" END"); 964 break; 965 966 case ENCRYPT_REQSTART: 967 output_data(" REQUEST-START"); 968 break; 969 970 case ENCRYPT_REQEND: 971 output_data(" REQUEST-END"); 972 break; 973 974 case ENCRYPT_IS: 975 case ENCRYPT_REPLY: 976 output_data(" %s ", (pointer[1] == ENCRYPT_IS) ? 977 "IS" : "REPLY"); 978 if (length < 3) { 979 output_data(" (partial suboption??\?)"); 980 break; 981 } 982 if (ENCTYPE_NAME_OK(pointer[2])) 983 output_data("%s ", ENCTYPE_NAME(pointer[2])); 984 else 985 output_data(" %d (unknown)", pointer[2]); 986 987 { 988 char buf[512]; 989 encrypt_printsub(&pointer[1], length - 1, buf, sizeof(buf)); 990 output_data("%s", buf); 991 } 992 break; 993 994 case ENCRYPT_SUPPORT: 995 i = 2; 996 output_data(" SUPPORT "); 997 while (i < length) { 998 if (ENCTYPE_NAME_OK(pointer[i])) 999 output_data("%s ", ENCTYPE_NAME(pointer[i])); 1000 else 1001 output_data("%d ", pointer[i]); 1002 i++; 1003 } 1004 break; 1005 1006 case ENCRYPT_ENC_KEYID: 1007 output_data(" ENC_KEYID"); 1008 goto encommon; 1009 1010 case ENCRYPT_DEC_KEYID: 1011 output_data(" DEC_KEYID"); 1012 goto encommon; 1013 1014 default: 1015 output_data(" %d (unknown)", pointer[1]); 1016 encommon: 1017 for (i = 2; i < length; i++) { 1018 output_data(" %d", pointer[i]); 1019 } 1020 break; 1021 } 1022 break; 1023 #endif /* ENCRYPTION */ 1024 1025 default: 1026 if (TELOPT_OK(pointer[0])) 1027 output_data("%s (unknown)", TELOPT(pointer[0])); 1028 else 1029 output_data("%d (unknown)", pointer[i]); 1030 for (i = 1; i < length; i++) { 1031 output_data(" %d", pointer[i]); 1032 } 1033 break; 1034 } 1035 output_data("\r\n"); 1036 } 1037 1038 /* 1039 * Dump a data buffer in hex and ascii to the output data stream. 1040 */ 1041 void 1042 printdata(const char *tag, char *ptr, int cnt) 1043 { 1044 int i; 1045 char xbuf[30]; 1046 1047 while (cnt) { 1048 /* flush net output buffer if no room for new data) */ 1049 if ((&netobuf[BUFSIZ] - nfrontp) < 80) { 1050 netflush(); 1051 } 1052 1053 /* add a line of output */ 1054 output_data("%s: ", tag); 1055 for (i = 0; i < 20 && cnt; i++) { 1056 output_data("%02x", *ptr); 1057 if (isprint(*ptr)) { 1058 xbuf[i] = *ptr; 1059 } else { 1060 xbuf[i] = '.'; 1061 } 1062 if (i % 2) { 1063 output_data(" "); 1064 } 1065 cnt--; 1066 ptr++; 1067 } 1068 xbuf[i] = '\0'; 1069 output_data(" %s\r\n", xbuf ); 1070 } 1071 } 1072 #endif /* DIAGNOSTICS */ 1073