utility.c revision 1.3
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 1.3 1993/08/30 18:50:55 mycroft Exp $"; 37 #endif /* not lint */ 38 39 #define PRINTOPTIONS 40 #include <sys/utsname.h> 41 #include "telnetd.h" 42 43 /* 44 * utility functions performing io related tasks 45 */ 46 47 /* 48 * ttloop 49 * 50 * A small subroutine to flush the network output buffer, get some data 51 * from the network, and pass it through the telnet state machine. We 52 * also flush the pty input buffer (by dropping its data) if it becomes 53 * too full. 54 */ 55 56 void 57 ttloop() 58 { 59 void netflush(); 60 61 DIAG(TD_REPORT, {sprintf(nfrontp, "td: ttloop\r\n"); 62 nfrontp += strlen(nfrontp);}); 63 if (nfrontp-nbackp) { 64 netflush(); 65 } 66 ncc = read(net, netibuf, sizeof netibuf); 67 if (ncc < 0) { 68 syslog(LOG_INFO, "ttloop: read: %m\n"); 69 exit(1); 70 } else if (ncc == 0) { 71 syslog(LOG_INFO, "ttloop: peer died: %m\n"); 72 exit(1); 73 } 74 DIAG(TD_REPORT, {sprintf(nfrontp, "td: ttloop read %d chars\r\n", ncc); 75 nfrontp += strlen(nfrontp);}); 76 netip = netibuf; 77 telrcv(); /* state machine */ 78 if (ncc > 0) { 79 pfrontp = pbackp = ptyobuf; 80 telrcv(); 81 } 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(s) 89 int s; /* socket number */ 90 { 91 static struct timeval timeout = { 0 }; 92 fd_set excepts; 93 int value; 94 95 do { 96 FD_ZERO(&excepts); 97 FD_SET(s, &excepts); 98 value = select(s+1, (fd_set *)0, (fd_set *)0, &excepts, &timeout); 99 } while ((value == -1) && (errno == EINTR)); 100 101 if (value < 0) { 102 fatalperror(pty, "select"); 103 } 104 if (FD_ISSET(s, &excepts)) { 105 return 1; 106 } else { 107 return 0; 108 } 109 } 110 111 void 112 ptyflush() 113 { 114 int n; 115 116 if ((n = pfrontp - pbackp) > 0) { 117 DIAG((TD_REPORT | TD_PTYDATA), 118 { sprintf(nfrontp, "td: ptyflush %d chars\r\n", n); 119 nfrontp += strlen(nfrontp); }); 120 DIAG(TD_PTYDATA, printdata("pd", pbackp, n)); 121 n = write(pty, pbackp, n); 122 } 123 if (n < 0) { 124 if (errno == EWOULDBLOCK || errno == EINTR) 125 return; 126 cleanup(0); 127 } 128 pbackp += n; 129 if (pbackp == pfrontp) 130 pbackp = pfrontp = ptyobuf; 131 } 132 133 /* 134 * nextitem() 135 * 136 * Return the address of the next "item" in the TELNET data 137 * stream. This will be the address of the next character if 138 * the current address is a user data character, or it will 139 * be the address of the character following the TELNET command 140 * if the current address is a TELNET IAC ("I Am a Command") 141 * character. 142 */ 143 char * 144 nextitem(current) 145 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 register 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 /* 175 * netclear() 176 * 177 * We are about to do a TELNET SYNCH operation. Clear 178 * the path to the network. 179 * 180 * Things are a bit tricky since we may have sent the first 181 * byte or so of a previous TELNET command into the network. 182 * So, we have to scan the network buffer from the beginning 183 * until we are up to where we want to be. 184 * 185 * A side effect of what we do, just to keep things 186 * simple, is to clear the urgent data pointer. The principal 187 * caller should be setting the urgent data pointer AFTER calling 188 * us in any case. 189 */ 190 void 191 netclear() 192 { 193 register char *thisitem, *next; 194 char *good; 195 #define wewant(p) ((nfrontp > p) && ((*p&0xff) == IAC) && \ 196 ((*(p+1)&0xff) != EC) && ((*(p+1)&0xff) != EL)) 197 198 #if defined(ENCRYPT) 199 thisitem = nclearto > netobuf ? nclearto : netobuf; 200 #else 201 thisitem = netobuf; 202 #endif 203 204 while ((next = nextitem(thisitem)) <= nbackp) { 205 thisitem = next; 206 } 207 208 /* Now, thisitem is first before/at boundary. */ 209 210 #if defined(ENCRYPT) 211 good = nclearto > netobuf ? nclearto : netobuf; 212 #else 213 good = netobuf; /* where the good bytes go */ 214 #endif 215 216 while (nfrontp > thisitem) { 217 if (wewant(thisitem)) { 218 int length; 219 220 next = thisitem; 221 do { 222 next = nextitem(next); 223 } while (wewant(next) && (nfrontp > next)); 224 length = next-thisitem; 225 bcopy(thisitem, good, length); 226 good += length; 227 thisitem = next; 228 } else { 229 thisitem = nextitem(thisitem); 230 } 231 } 232 233 nbackp = netobuf; 234 nfrontp = good; /* next byte to be sent */ 235 neturg = 0; 236 } /* end of netclear */ 237 238 /* 239 * netflush 240 * Send as much data as possible to the network, 241 * handling requests for urgent data. 242 */ 243 void 244 netflush() 245 { 246 int n; 247 extern int not42; 248 249 if ((n = nfrontp - nbackp) > 0) { 250 DIAG(TD_REPORT, 251 { sprintf(nfrontp, "td: netflush %d chars\r\n", n); 252 n += strlen(nfrontp); /* get count first */ 253 nfrontp += strlen(nfrontp); /* then move pointer */ 254 }); 255 #if defined(ENCRYPT) 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 ((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 } 288 if (n < 0) { 289 if (errno == EWOULDBLOCK || errno == EINTR) 290 return; 291 cleanup(0); 292 } 293 nbackp += n; 294 #if defined(ENCRYPT) 295 if (nbackp > nclearto) 296 nclearto = 0; 297 #endif 298 if (nbackp >= neturg) { 299 neturg = 0; 300 } 301 if (nbackp == nfrontp) { 302 nbackp = nfrontp = netobuf; 303 #if defined(ENCRYPT) 304 nclearto = 0; 305 #endif 306 } 307 return; 308 } /* end of netflush */ 309 310 311 /* 312 * writenet 313 * 314 * Just a handy little function to write a bit of raw data to the net. 315 * It will force a transmit of the buffer if necessary 316 * 317 * arguments 318 * ptr - A pointer to a character string to write 319 * len - How many bytes to write 320 */ 321 void 322 writenet(ptr, len) 323 register unsigned char *ptr; 324 register int len; 325 { 326 /* flush buffer if no room for new data) */ 327 if ((&netobuf[BUFSIZ] - nfrontp) < len) { 328 /* if this fails, don't worry, buffer is a little big */ 329 netflush(); 330 } 331 332 bcopy(ptr, nfrontp, len); 333 nfrontp += len; 334 335 } /* end of writenet */ 336 337 338 /* 339 * miscellaneous functions doing a variety of little jobs follow ... 340 */ 341 342 343 void 344 fatal(f, msg) 345 int f; 346 char *msg; 347 { 348 char buf[BUFSIZ]; 349 350 (void) sprintf(buf, "telnetd: %s.\r\n", msg); 351 #if defined(ENCRYPT) 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 (void) write(f, buf, (int)strlen(buf)); 362 sleep(1); /*XXX*/ 363 exit(1); 364 } 365 366 void 367 fatalperror(f, msg) 368 int f; 369 char *msg; 370 { 371 char buf[BUFSIZ], *strerror(); 372 373 (void) sprintf(buf, "%s: %s\r\n", msg, strerror(errno)); 374 fatal(f, buf); 375 } 376 377 char editedhost[32]; 378 struct utsname kerninfo; 379 380 void 381 edithost(pat, host) 382 register char *pat; 383 register char *host; 384 { 385 register char *res = editedhost; 386 char *strncpy(); 387 388 uname(&kerninfo); 389 390 if (!pat) 391 pat = ""; 392 while (*pat) { 393 switch (*pat) { 394 395 case '#': 396 if (*host) 397 host++; 398 break; 399 400 case '@': 401 if (*host) 402 *res++ = *host++; 403 break; 404 405 default: 406 *res++ = *pat; 407 break; 408 } 409 if (res == &editedhost[sizeof editedhost - 1]) { 410 *res = '\0'; 411 return; 412 } 413 pat++; 414 } 415 if (*host) 416 (void) strncpy(res, host, 417 sizeof editedhost - (res - editedhost) -1); 418 else 419 *res = '\0'; 420 editedhost[sizeof editedhost - 1] = '\0'; 421 } 422 423 static char *putlocation; 424 425 void 426 putstr(s) 427 register char *s; 428 { 429 430 while (*s) 431 putchr(*s++); 432 } 433 434 void 435 putchr(cc) 436 int cc; 437 { 438 *putlocation++ = cc; 439 } 440 441 /* 442 * This is split on two lines so that SCCS will not see the M 443 * between two % signs and expand it... 444 */ 445 static char fmtstr[] = { "%l:%M\ 446 %P on %A, %d %B %Y" }; 447 448 void 449 putf(cp, where) 450 register char *cp; 451 char *where; 452 { 453 char *slash; 454 time_t t; 455 char db[100]; 456 extern char *rindex(); 457 458 putlocation = where; 459 460 while (*cp) { 461 if (*cp != '%') { 462 putchr(*cp++); 463 continue; 464 } 465 switch (*++cp) { 466 467 case 't': 468 slash = rindex(line, '/'); 469 if (slash == (char *) 0) 470 putstr(line); 471 else 472 putstr(&slash[1]); 473 break; 474 475 case 'h': 476 putstr(editedhost); 477 break; 478 479 case 'd': 480 (void)time(&t); 481 (void)strftime(db, sizeof(db), fmtstr, localtime(&t)); 482 putstr(db); 483 break; 484 485 case '%': 486 putchr('%'); 487 break; 488 489 case 's': 490 puts(kerninfo.sysname); 491 492 case 'm': 493 puts(kerninfo.machine); 494 495 case 'r': 496 puts(kerninfo.release); 497 498 case 'v': 499 puts(kerninfo.version); 500 break; 501 } 502 cp++; 503 } 504 } 505 506 #ifdef DIAGNOSTICS 507 /* 508 * Print telnet options and commands in plain text, if possible. 509 */ 510 void 511 printoption(fmt, option) 512 register char *fmt; 513 register int option; 514 { 515 if (TELOPT_OK(option)) 516 sprintf(nfrontp, "%s %s\r\n", fmt, TELOPT(option)); 517 else if (TELCMD_OK(option)) 518 sprintf(nfrontp, "%s %s\r\n", fmt, TELCMD(option)); 519 else 520 sprintf(nfrontp, "%s %d\r\n", fmt, option); 521 nfrontp += strlen(nfrontp); 522 return; 523 } 524 525 void 526 printsub(direction, pointer, length) 527 char direction; /* '<' or '>' */ 528 unsigned char *pointer; /* where suboption data sits */ 529 int length; /* length of suboption data */ 530 { 531 register int i; 532 char buf[512]; 533 534 if (!(diagnostic & TD_OPTIONS)) 535 return; 536 537 if (direction) { 538 sprintf(nfrontp, "td: %s suboption ", 539 direction == '<' ? "recv" : "send"); 540 nfrontp += strlen(nfrontp); 541 if (length >= 3) { 542 register int j; 543 544 i = pointer[length-2]; 545 j = pointer[length-1]; 546 547 if (i != IAC || j != SE) { 548 sprintf(nfrontp, "(terminated by "); 549 nfrontp += strlen(nfrontp); 550 if (TELOPT_OK(i)) 551 sprintf(nfrontp, "%s ", TELOPT(i)); 552 else if (TELCMD_OK(i)) 553 sprintf(nfrontp, "%s ", TELCMD(i)); 554 else 555 sprintf(nfrontp, "%d ", i); 556 nfrontp += strlen(nfrontp); 557 if (TELOPT_OK(j)) 558 sprintf(nfrontp, "%s", TELOPT(j)); 559 else if (TELCMD_OK(j)) 560 sprintf(nfrontp, "%s", TELCMD(j)); 561 else 562 sprintf(nfrontp, "%d", j); 563 nfrontp += strlen(nfrontp); 564 sprintf(nfrontp, ", not IAC SE!) "); 565 nfrontp += strlen(nfrontp); 566 } 567 } 568 length -= 2; 569 } 570 if (length < 1) { 571 sprintf(nfrontp, "(Empty suboption???)"); 572 nfrontp += strlen(nfrontp); 573 return; 574 } 575 switch (pointer[0]) { 576 case TELOPT_TTYPE: 577 sprintf(nfrontp, "TERMINAL-TYPE "); 578 nfrontp += strlen(nfrontp); 579 switch (pointer[1]) { 580 case TELQUAL_IS: 581 sprintf(nfrontp, "IS \"%.*s\"", length-2, (char *)pointer+2); 582 break; 583 case TELQUAL_SEND: 584 sprintf(nfrontp, "SEND"); 585 break; 586 default: 587 sprintf(nfrontp, 588 "- unknown qualifier %d (0x%x).", 589 pointer[1], pointer[1]); 590 } 591 nfrontp += strlen(nfrontp); 592 break; 593 case TELOPT_TSPEED: 594 sprintf(nfrontp, "TERMINAL-SPEED"); 595 nfrontp += strlen(nfrontp); 596 if (length < 2) { 597 sprintf(nfrontp, " (empty suboption???)"); 598 nfrontp += strlen(nfrontp); 599 break; 600 } 601 switch (pointer[1]) { 602 case TELQUAL_IS: 603 sprintf(nfrontp, " IS %.*s", length-2, (char *)pointer+2); 604 nfrontp += strlen(nfrontp); 605 break; 606 default: 607 if (pointer[1] == 1) 608 sprintf(nfrontp, " SEND"); 609 else 610 sprintf(nfrontp, " %d (unknown)", pointer[1]); 611 nfrontp += strlen(nfrontp); 612 for (i = 2; i < length; i++) { 613 sprintf(nfrontp, " ?%d?", pointer[i]); 614 nfrontp += strlen(nfrontp); 615 } 616 break; 617 } 618 break; 619 620 case TELOPT_LFLOW: 621 sprintf(nfrontp, "TOGGLE-FLOW-CONTROL"); 622 nfrontp += strlen(nfrontp); 623 if (length < 2) { 624 sprintf(nfrontp, " (empty suboption???)"); 625 nfrontp += strlen(nfrontp); 626 break; 627 } 628 switch (pointer[1]) { 629 case 0: 630 sprintf(nfrontp, " OFF"); break; 631 case 1: 632 sprintf(nfrontp, " ON"); break; 633 default: 634 sprintf(nfrontp, " %d (unknown)", pointer[1]); 635 } 636 nfrontp += strlen(nfrontp); 637 for (i = 2; i < length; i++) { 638 sprintf(nfrontp, " ?%d?", pointer[i]); 639 nfrontp += strlen(nfrontp); 640 } 641 break; 642 643 case TELOPT_NAWS: 644 sprintf(nfrontp, "NAWS"); 645 nfrontp += strlen(nfrontp); 646 if (length < 2) { 647 sprintf(nfrontp, " (empty suboption???)"); 648 nfrontp += strlen(nfrontp); 649 break; 650 } 651 if (length == 2) { 652 sprintf(nfrontp, " ?%d?", pointer[1]); 653 nfrontp += strlen(nfrontp); 654 break; 655 } 656 sprintf(nfrontp, " %d %d (%d)", 657 pointer[1], pointer[2], 658 (int)((((unsigned int)pointer[1])<<8)|((unsigned int)pointer[2]))); 659 nfrontp += strlen(nfrontp); 660 if (length == 4) { 661 sprintf(nfrontp, " ?%d?", pointer[3]); 662 nfrontp += strlen(nfrontp); 663 break; 664 } 665 sprintf(nfrontp, " %d %d (%d)", 666 pointer[3], pointer[4], 667 (int)((((unsigned int)pointer[3])<<8)|((unsigned int)pointer[4]))); 668 nfrontp += strlen(nfrontp); 669 for (i = 5; i < length; i++) { 670 sprintf(nfrontp, " ?%d?", pointer[i]); 671 nfrontp += strlen(nfrontp); 672 } 673 break; 674 675 case TELOPT_LINEMODE: 676 sprintf(nfrontp, "LINEMODE "); 677 nfrontp += strlen(nfrontp); 678 if (length < 2) { 679 sprintf(nfrontp, " (empty suboption???)"); 680 nfrontp += strlen(nfrontp); 681 break; 682 } 683 switch (pointer[1]) { 684 case WILL: 685 sprintf(nfrontp, "WILL "); 686 goto common; 687 case WONT: 688 sprintf(nfrontp, "WONT "); 689 goto common; 690 case DO: 691 sprintf(nfrontp, "DO "); 692 goto common; 693 case DONT: 694 sprintf(nfrontp, "DONT "); 695 common: 696 nfrontp += strlen(nfrontp); 697 if (length < 3) { 698 sprintf(nfrontp, "(no option???)"); 699 nfrontp += strlen(nfrontp); 700 break; 701 } 702 switch (pointer[2]) { 703 case LM_FORWARDMASK: 704 sprintf(nfrontp, "Forward Mask"); 705 nfrontp += strlen(nfrontp); 706 for (i = 3; i < length; i++) { 707 sprintf(nfrontp, " %x", pointer[i]); 708 nfrontp += strlen(nfrontp); 709 } 710 break; 711 default: 712 sprintf(nfrontp, "%d (unknown)", pointer[2]); 713 nfrontp += strlen(nfrontp); 714 for (i = 3; i < length; i++) { 715 sprintf(nfrontp, " %d", pointer[i]); 716 nfrontp += strlen(nfrontp); 717 } 718 break; 719 } 720 break; 721 722 case LM_SLC: 723 sprintf(nfrontp, "SLC"); 724 nfrontp += strlen(nfrontp); 725 for (i = 2; i < length - 2; i += 3) { 726 if (SLC_NAME_OK(pointer[i+SLC_FUNC])) 727 sprintf(nfrontp, " %s", SLC_NAME(pointer[i+SLC_FUNC])); 728 else 729 sprintf(nfrontp, " %d", pointer[i+SLC_FUNC]); 730 nfrontp += strlen(nfrontp); 731 switch (pointer[i+SLC_FLAGS]&SLC_LEVELBITS) { 732 case SLC_NOSUPPORT: 733 sprintf(nfrontp, " NOSUPPORT"); break; 734 case SLC_CANTCHANGE: 735 sprintf(nfrontp, " CANTCHANGE"); break; 736 case SLC_VARIABLE: 737 sprintf(nfrontp, " VARIABLE"); break; 738 case SLC_DEFAULT: 739 sprintf(nfrontp, " DEFAULT"); break; 740 } 741 nfrontp += strlen(nfrontp); 742 sprintf(nfrontp, "%s%s%s", 743 pointer[i+SLC_FLAGS]&SLC_ACK ? "|ACK" : "", 744 pointer[i+SLC_FLAGS]&SLC_FLUSHIN ? "|FLUSHIN" : "", 745 pointer[i+SLC_FLAGS]&SLC_FLUSHOUT ? "|FLUSHOUT" : ""); 746 nfrontp += strlen(nfrontp); 747 if (pointer[i+SLC_FLAGS]& ~(SLC_ACK|SLC_FLUSHIN| 748 SLC_FLUSHOUT| SLC_LEVELBITS)) { 749 sprintf(nfrontp, "(0x%x)", pointer[i+SLC_FLAGS]); 750 nfrontp += strlen(nfrontp); 751 } 752 sprintf(nfrontp, " %d;", pointer[i+SLC_VALUE]); 753 nfrontp += strlen(nfrontp); 754 if ((pointer[i+SLC_VALUE] == IAC) && 755 (pointer[i+SLC_VALUE+1] == IAC)) 756 i++; 757 } 758 for (; i < length; i++) { 759 sprintf(nfrontp, " ?%d?", pointer[i]); 760 nfrontp += strlen(nfrontp); 761 } 762 break; 763 764 case LM_MODE: 765 sprintf(nfrontp, "MODE "); 766 nfrontp += strlen(nfrontp); 767 if (length < 3) { 768 sprintf(nfrontp, "(no mode???)"); 769 nfrontp += strlen(nfrontp); 770 break; 771 } 772 { 773 char tbuf[32]; 774 sprintf(tbuf, "%s%s%s%s%s", 775 pointer[2]&MODE_EDIT ? "|EDIT" : "", 776 pointer[2]&MODE_TRAPSIG ? "|TRAPSIG" : "", 777 pointer[2]&MODE_SOFT_TAB ? "|SOFT_TAB" : "", 778 pointer[2]&MODE_LIT_ECHO ? "|LIT_ECHO" : "", 779 pointer[2]&MODE_ACK ? "|ACK" : ""); 780 sprintf(nfrontp, "%s", tbuf[1] ? &tbuf[1] : "0"); 781 nfrontp += strlen(nfrontp); 782 } 783 if (pointer[2]&~(MODE_EDIT|MODE_TRAPSIG|MODE_ACK)) { 784 sprintf(nfrontp, " (0x%x)", pointer[2]); 785 nfrontp += strlen(nfrontp); 786 } 787 for (i = 3; i < length; i++) { 788 sprintf(nfrontp, " ?0x%x?", pointer[i]); 789 nfrontp += strlen(nfrontp); 790 } 791 break; 792 default: 793 sprintf(nfrontp, "%d (unknown)", pointer[1]); 794 nfrontp += strlen(nfrontp); 795 for (i = 2; i < length; i++) { 796 sprintf(nfrontp, " %d", pointer[i]); 797 nfrontp += strlen(nfrontp); 798 } 799 } 800 break; 801 802 case TELOPT_STATUS: { 803 register char *cp; 804 register int j, k; 805 806 sprintf(nfrontp, "STATUS"); 807 nfrontp += strlen(nfrontp); 808 809 switch (pointer[1]) { 810 default: 811 if (pointer[1] == TELQUAL_SEND) 812 sprintf(nfrontp, " SEND"); 813 else 814 sprintf(nfrontp, " %d (unknown)", pointer[1]); 815 nfrontp += strlen(nfrontp); 816 for (i = 2; i < length; i++) { 817 sprintf(nfrontp, " ?%d?", pointer[i]); 818 nfrontp += strlen(nfrontp); 819 } 820 break; 821 case TELQUAL_IS: 822 sprintf(nfrontp, " IS\r\n"); 823 nfrontp += strlen(nfrontp); 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((int)pointer[i])) 834 sprintf(nfrontp, " %s %s", cp, TELOPT(pointer[i])); 835 else 836 sprintf(nfrontp, " %s %d", cp, pointer[i]); 837 nfrontp += strlen(nfrontp); 838 839 sprintf(nfrontp, "\r\n"); 840 nfrontp += strlen(nfrontp); 841 break; 842 843 case SB: 844 sprintf(nfrontp, " SB "); 845 nfrontp += strlen(nfrontp); 846 i++; 847 j = k = i; 848 while (j < length) { 849 if (pointer[j] == SE) { 850 if (j+1 == length) 851 break; 852 if (pointer[j+1] == SE) 853 j++; 854 else 855 break; 856 } 857 pointer[k++] = pointer[j++]; 858 } 859 printsub(0, &pointer[i], k - i); 860 if (i < length) { 861 sprintf(nfrontp, " SE"); 862 nfrontp += strlen(nfrontp); 863 i = j; 864 } else 865 i = j - 1; 866 867 sprintf(nfrontp, "\r\n"); 868 nfrontp += strlen(nfrontp); 869 870 break; 871 872 default: 873 sprintf(nfrontp, " %d", pointer[i]); 874 nfrontp += strlen(nfrontp); 875 break; 876 } 877 } 878 break; 879 } 880 break; 881 } 882 883 case TELOPT_XDISPLOC: 884 sprintf(nfrontp, "X-DISPLAY-LOCATION "); 885 nfrontp += strlen(nfrontp); 886 switch (pointer[1]) { 887 case TELQUAL_IS: 888 sprintf(nfrontp, "IS \"%.*s\"", length-2, (char *)pointer+2); 889 break; 890 case TELQUAL_SEND: 891 sprintf(nfrontp, "SEND"); 892 break; 893 default: 894 sprintf(nfrontp, "- unknown qualifier %d (0x%x).", 895 pointer[1], pointer[1]); 896 } 897 nfrontp += strlen(nfrontp); 898 break; 899 900 case TELOPT_ENVIRON: 901 sprintf(nfrontp, "ENVIRON "); 902 nfrontp += strlen(nfrontp); 903 switch (pointer[1]) { 904 case TELQUAL_IS: 905 sprintf(nfrontp, "IS "); 906 goto env_common; 907 case TELQUAL_SEND: 908 sprintf(nfrontp, "SEND "); 909 goto env_common; 910 case TELQUAL_INFO: 911 sprintf(nfrontp, "INFO "); 912 env_common: 913 nfrontp += strlen(nfrontp); 914 { 915 register int noquote = 2; 916 for (i = 2; i < length; i++ ) { 917 switch (pointer[i]) { 918 case ENV_VAR: 919 if (pointer[1] == TELQUAL_SEND) 920 goto def_case; 921 sprintf(nfrontp, "\" VAR " + noquote); 922 nfrontp += strlen(nfrontp); 923 noquote = 2; 924 break; 925 926 case ENV_VALUE: 927 sprintf(nfrontp, "\" VALUE " + noquote); 928 nfrontp += strlen(nfrontp); 929 noquote = 2; 930 break; 931 932 case ENV_ESC: 933 sprintf(nfrontp, "\" ESC " + noquote); 934 nfrontp += strlen(nfrontp); 935 noquote = 2; 936 break; 937 938 default: 939 def_case: 940 if (isprint(pointer[i]) && pointer[i] != '"') { 941 if (noquote) { 942 *nfrontp++ = '"'; 943 noquote = 0; 944 } 945 *nfrontp++ = pointer[i]; 946 } else { 947 sprintf(nfrontp, "\" %03o " + noquote, 948 pointer[i]); 949 nfrontp += strlen(nfrontp); 950 noquote = 2; 951 } 952 break; 953 } 954 } 955 if (!noquote) 956 *nfrontp++ = '"'; 957 break; 958 } 959 } 960 break; 961 962 #if defined(AUTHENTICATE) 963 case TELOPT_AUTHENTICATION: 964 sprintf(nfrontp, "AUTHENTICATION"); 965 nfrontp += strlen(nfrontp); 966 967 if (length < 2) { 968 sprintf(nfrontp, " (empty suboption???)"); 969 nfrontp += strlen(nfrontp); 970 break; 971 } 972 switch (pointer[1]) { 973 case TELQUAL_REPLY: 974 case TELQUAL_IS: 975 sprintf(nfrontp, " %s ", (pointer[1] == TELQUAL_IS) ? 976 "IS" : "REPLY"); 977 nfrontp += strlen(nfrontp); 978 if (AUTHTYPE_NAME_OK(pointer[2])) 979 sprintf(nfrontp, "%s ", AUTHTYPE_NAME(pointer[2])); 980 else 981 sprintf(nfrontp, "%d ", pointer[2]); 982 nfrontp += strlen(nfrontp); 983 if (length < 3) { 984 sprintf(nfrontp, "(partial suboption???)"); 985 nfrontp += strlen(nfrontp); 986 break; 987 } 988 sprintf(nfrontp, "%s|%s", 989 ((pointer[3] & AUTH_WHO_MASK) == AUTH_WHO_CLIENT) ? 990 "CLIENT" : "SERVER", 991 ((pointer[3] & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL) ? 992 "MUTUAL" : "ONE-WAY"); 993 nfrontp += strlen(nfrontp); 994 995 auth_printsub(&pointer[1], length - 1, buf, sizeof(buf)); 996 sprintf(nfrontp, "%s", buf); 997 nfrontp += strlen(nfrontp); 998 break; 999 1000 case TELQUAL_SEND: 1001 i = 2; 1002 sprintf(nfrontp, " SEND "); 1003 nfrontp += strlen(nfrontp); 1004 while (i < length) { 1005 if (AUTHTYPE_NAME_OK(pointer[i])) 1006 sprintf(nfrontp, "%s ", AUTHTYPE_NAME(pointer[i])); 1007 else 1008 sprintf(nfrontp, "%d ", pointer[i]); 1009 nfrontp += strlen(nfrontp); 1010 if (++i >= length) { 1011 sprintf(nfrontp, "(partial suboption???)"); 1012 nfrontp += strlen(nfrontp); 1013 break; 1014 } 1015 sprintf(nfrontp, "%s|%s ", 1016 ((pointer[i] & AUTH_WHO_MASK) == AUTH_WHO_CLIENT) ? 1017 "CLIENT" : "SERVER", 1018 ((pointer[i] & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL) ? 1019 "MUTUAL" : "ONE-WAY"); 1020 nfrontp += strlen(nfrontp); 1021 ++i; 1022 } 1023 break; 1024 1025 case TELQUAL_NAME: 1026 i = 2; 1027 sprintf(nfrontp, " NAME \""); 1028 nfrontp += strlen(nfrontp); 1029 while (i < length) 1030 *nfrontp += pointer[i++]; 1031 *nfrontp += '"'; 1032 break; 1033 1034 default: 1035 for (i = 2; i < length; i++) { 1036 sprintf(nfrontp, " ?%d?", pointer[i]); 1037 nfrontp += strlen(nfrontp); 1038 } 1039 break; 1040 } 1041 break; 1042 #endif 1043 1044 #if defined(ENCRYPT) 1045 case TELOPT_ENCRYPT: 1046 sprintf(nfrontp, "ENCRYPT"); 1047 nfrontp += strlen(nfrontp); 1048 if (length < 2) { 1049 sprintf(nfrontp, " (empty suboption???)"); 1050 nfrontp += strlen(nfrontp); 1051 break; 1052 } 1053 switch (pointer[1]) { 1054 case ENCRYPT_START: 1055 sprintf(nfrontp, " START"); 1056 nfrontp += strlen(nfrontp); 1057 break; 1058 1059 case ENCRYPT_END: 1060 sprintf(nfrontp, " END"); 1061 nfrontp += strlen(nfrontp); 1062 break; 1063 1064 case ENCRYPT_REQSTART: 1065 sprintf(nfrontp, " REQUEST-START"); 1066 nfrontp += strlen(nfrontp); 1067 break; 1068 1069 case ENCRYPT_REQEND: 1070 sprintf(nfrontp, " REQUEST-END"); 1071 nfrontp += strlen(nfrontp); 1072 break; 1073 1074 case ENCRYPT_IS: 1075 case ENCRYPT_REPLY: 1076 sprintf(nfrontp, " %s ", (pointer[1] == ENCRYPT_IS) ? 1077 "IS" : "REPLY"); 1078 nfrontp += strlen(nfrontp); 1079 if (length < 3) { 1080 sprintf(nfrontp, " (partial suboption???)"); 1081 nfrontp += strlen(nfrontp); 1082 break; 1083 } 1084 if (ENCTYPE_NAME_OK(pointer[2])) 1085 sprintf(nfrontp, "%s ", ENCTYPE_NAME(pointer[2])); 1086 else 1087 sprintf(nfrontp, " %d (unknown)", pointer[2]); 1088 nfrontp += strlen(nfrontp); 1089 1090 encrypt_printsub(&pointer[1], length - 1, buf, sizeof(buf)); 1091 sprintf(nfrontp, "%s", buf); 1092 nfrontp += strlen(nfrontp); 1093 break; 1094 1095 case ENCRYPT_SUPPORT: 1096 i = 2; 1097 sprintf(nfrontp, " SUPPORT "); 1098 nfrontp += strlen(nfrontp); 1099 while (i < length) { 1100 if (ENCTYPE_NAME_OK(pointer[i])) 1101 sprintf(nfrontp, "%s ", ENCTYPE_NAME(pointer[i])); 1102 else 1103 sprintf(nfrontp, "%d ", pointer[i]); 1104 nfrontp += strlen(nfrontp); 1105 i++; 1106 } 1107 break; 1108 1109 case ENCRYPT_ENC_KEYID: 1110 sprintf(nfrontp, " ENC_KEYID", pointer[1]); 1111 nfrontp += strlen(nfrontp); 1112 goto encommon; 1113 1114 case ENCRYPT_DEC_KEYID: 1115 sprintf(nfrontp, " DEC_KEYID", pointer[1]); 1116 nfrontp += strlen(nfrontp); 1117 goto encommon; 1118 1119 default: 1120 sprintf(nfrontp, " %d (unknown)", pointer[1]); 1121 nfrontp += strlen(nfrontp); 1122 encommon: 1123 for (i = 2; i < length; i++) { 1124 sprintf(nfrontp, " %d", pointer[i]); 1125 nfrontp += strlen(nfrontp); 1126 } 1127 break; 1128 } 1129 break; 1130 #endif 1131 1132 default: 1133 if (TELOPT_OK(pointer[0])) 1134 sprintf(nfrontp, "%s (unknown)", TELOPT(pointer[0])); 1135 else 1136 sprintf(nfrontp, "%d (unknown)", pointer[i]); 1137 nfrontp += strlen(nfrontp); 1138 for (i = 1; i < length; i++) { 1139 sprintf(nfrontp, " %d", pointer[i]); 1140 nfrontp += strlen(nfrontp); 1141 } 1142 break; 1143 } 1144 sprintf(nfrontp, "\r\n"); 1145 nfrontp += strlen(nfrontp); 1146 } 1147 1148 /* 1149 * Dump a data buffer in hex and ascii to the output data stream. 1150 */ 1151 void 1152 printdata(tag, ptr, cnt) 1153 register char *tag; 1154 register char *ptr; 1155 register int cnt; 1156 { 1157 register int i; 1158 char xbuf[30]; 1159 1160 while (cnt) { 1161 /* flush net output buffer if no room for new data) */ 1162 if ((&netobuf[BUFSIZ] - nfrontp) < 80) { 1163 netflush(); 1164 } 1165 1166 /* add a line of output */ 1167 sprintf(nfrontp, "%s: ", tag); 1168 nfrontp += strlen(nfrontp); 1169 for (i = 0; i < 20 && cnt; i++) { 1170 sprintf(nfrontp, "%02x", *ptr); 1171 nfrontp += strlen(nfrontp); 1172 if (isprint(*ptr)) { 1173 xbuf[i] = *ptr; 1174 } else { 1175 xbuf[i] = '.'; 1176 } 1177 if (i % 2) { 1178 *nfrontp = ' '; 1179 nfrontp++; 1180 } 1181 cnt--; 1182 ptr++; 1183 } 1184 xbuf[i] = '\0'; 1185 sprintf(nfrontp, " %s\r\n", xbuf ); 1186 nfrontp += strlen(nfrontp); 1187 } 1188 } 1189 #endif /* DIAGNOSTICS */ 1190
Indexes created Fri Sep 26 20:09:58 GMT 2025