utility.c revision 1.8
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 #ifndef lint 35 /* from: static char sccsid[] = "@(#)utility.c 8.4 (Berkeley) 5/30/95"; */ 36 static char rcsid[] = "$NetBSD: utility.c,v 1.8 1996/02/24 01:22:28 jtk Exp $"; 37 #endif /* not lint */ 38 39 #include <sys/utsname.h> 40 #define PRINTOPTIONS 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 thisitem = netobuf; 199 200 while ((next = nextitem(thisitem)) <= nbackp) { 201 thisitem = next; 202 } 203 204 /* Now, thisitem is first before/at boundary. */ 205 206 good = netobuf; /* where the good bytes go */ 207 208 while (nfrontp > thisitem) { 209 if (wewant(thisitem)) { 210 int length; 211 212 next = thisitem; 213 do { 214 next = nextitem(next); 215 } while (wewant(next) && (nfrontp > next)); 216 length = next-thisitem; 217 memmove(good, thisitem, length); 218 good += length; 219 thisitem = next; 220 } else { 221 thisitem = nextitem(thisitem); 222 } 223 } 224 225 nbackp = netobuf; 226 nfrontp = good; /* next byte to be sent */ 227 neturg = 0; 228 } /* end of netclear */ 229 230 /* 231 * netflush 232 * Send as much data as possible to the network, 233 * handling requests for urgent data. 234 */ 235 void 236 netflush() 237 { 238 int n; 239 extern int not42; 240 241 if ((n = nfrontp - nbackp) > 0) { 242 DIAG(TD_REPORT, 243 { sprintf(nfrontp, "td: netflush %d chars\r\n", n); 244 n += strlen(nfrontp); /* get count first */ 245 nfrontp += strlen(nfrontp); /* then move pointer */ 246 }); 247 /* 248 * if no urgent data, or if the other side appears to be an 249 * old 4.2 client (and thus unable to survive TCP urgent data), 250 * write the entire buffer in non-OOB mode. 251 */ 252 if ((neturg == 0) || (not42 == 0)) { 253 n = write(net, nbackp, n); /* normal write */ 254 } else { 255 n = neturg - nbackp; 256 /* 257 * In 4.2 (and 4.3) systems, there is some question about 258 * what byte in a sendOOB operation is the "OOB" data. 259 * To make ourselves compatible, we only send ONE byte 260 * out of band, the one WE THINK should be OOB (though 261 * we really have more the TCP philosophy of urgent data 262 * rather than the Unix philosophy of OOB data). 263 */ 264 if (n > 1) { 265 n = send(net, nbackp, n-1, 0); /* send URGENT all by itself */ 266 } else { 267 n = send(net, nbackp, n, MSG_OOB); /* URGENT data */ 268 } 269 } 270 } 271 if (n < 0) { 272 if (errno == EWOULDBLOCK || errno == EINTR) 273 return; 274 cleanup(0); 275 } 276 nbackp += n; 277 if (nbackp >= neturg) { 278 neturg = 0; 279 } 280 if (nbackp == nfrontp) { 281 nbackp = nfrontp = netobuf; 282 } 283 return; 284 } /* end of netflush */ 285 286 287 /* 288 * writenet 289 * 290 * Just a handy little function to write a bit of raw data to the net. 291 * It will force a transmit of the buffer if necessary 292 * 293 * arguments 294 * ptr - A pointer to a character string to write 295 * len - How many bytes to write 296 */ 297 void 298 writenet(ptr, len) 299 register unsigned char *ptr; 300 register int len; 301 { 302 /* flush buffer if no room for new data) */ 303 if ((&netobuf[BUFSIZ] - nfrontp) < len) { 304 /* if this fails, don't worry, buffer is a little big */ 305 netflush(); 306 } 307 308 memmove(nfrontp, ptr, len); 309 nfrontp += len; 310 311 } /* end of writenet */ 312 313 314 /* 315 * miscellaneous functions doing a variety of little jobs follow ... 316 */ 317 318 319 void 320 fatal(f, msg) 321 int f; 322 char *msg; 323 { 324 char buf[BUFSIZ]; 325 326 (void) sprintf(buf, "telnetd: %s.\r\n", msg); 327 (void) write(f, buf, (int)strlen(buf)); 328 sleep(1); /*XXX*/ 329 exit(1); 330 } 331 332 void 333 fatalperror(f, msg) 334 int f; 335 char *msg; 336 { 337 char buf[BUFSIZ], *strerror(); 338 339 (void) sprintf(buf, "%s: %s", msg, strerror(errno)); 340 fatal(f, buf); 341 } 342 343 char editedhost[32]; 344 345 void 346 edithost(pat, host) 347 register char *pat; 348 register char *host; 349 { 350 register char *res = editedhost; 351 char *strncpy(); 352 353 if (!pat) 354 pat = ""; 355 while (*pat) { 356 switch (*pat) { 357 358 case '#': 359 if (*host) 360 host++; 361 break; 362 363 case '@': 364 if (*host) 365 *res++ = *host++; 366 break; 367 368 default: 369 *res++ = *pat; 370 break; 371 } 372 if (res == &editedhost[sizeof editedhost - 1]) { 373 *res = '\0'; 374 return; 375 } 376 pat++; 377 } 378 if (*host) 379 (void) strncpy(res, host, 380 sizeof editedhost - (res - editedhost) -1); 381 else 382 *res = '\0'; 383 editedhost[sizeof editedhost - 1] = '\0'; 384 } 385 386 static char *putlocation; 387 388 void 389 putstr(s) 390 register char *s; 391 { 392 393 while (*s) 394 putchr(*s++); 395 } 396 397 void 398 putchr(cc) 399 int cc; 400 { 401 *putlocation++ = cc; 402 } 403 404 /* 405 * This is split on two lines so that SCCS will not see the M 406 * between two % signs and expand it... 407 */ 408 static char fmtstr[] = { "%l:%M\ 409 %p on %A, %d %B %Y" }; 410 411 void 412 putf(cp, where) 413 register char *cp; 414 char *where; 415 { 416 char *slash; 417 time_t t; 418 char db[100]; 419 struct utsname utsinfo; 420 #ifdef STREAMSPTY 421 extern char *strchr(); 422 #else 423 extern char *strrchr(); 424 #endif 425 426 uname(&utsinfo); 427 428 putlocation = where; 429 430 while (*cp) { 431 if (*cp != '%') { 432 putchr(*cp++); 433 continue; 434 } 435 switch (*++cp) { 436 437 case 't': 438 #ifdef STREAMSPTY 439 /* names are like /dev/pts/2 -- we want pts/2 */ 440 slash = strchr(line+1, '/'); 441 #else 442 slash = strrchr(line, '/'); 443 #endif 444 if (slash == (char *) 0) 445 putstr(line); 446 else 447 putstr(&slash[1]); 448 break; 449 450 case 'h': 451 putstr(editedhost); 452 break; 453 454 case 'd': 455 (void)time(&t); 456 (void)strftime(db, sizeof(db), fmtstr, localtime(&t)); 457 putstr(db); 458 break; 459 460 case '%': 461 putchr('%'); 462 break; 463 464 case 's': 465 putstr(utsinfo.sysname); 466 break; 467 468 case 'm': 469 putstr(utsinfo.machine); 470 break; 471 472 case 'r': 473 putstr(utsinfo.release); 474 break; 475 476 case 'v': 477 puts(utsinfo.version); 478 break; 479 } 480 cp++; 481 } 482 } 483 484 #ifdef DIAGNOSTICS 485 /* 486 * Print telnet options and commands in plain text, if possible. 487 */ 488 void 489 printoption(fmt, option) 490 register char *fmt; 491 register int option; 492 { 493 if (TELOPT_OK(option)) 494 sprintf(nfrontp, "%s %s\r\n", fmt, TELOPT(option)); 495 else if (TELCMD_OK(option)) 496 sprintf(nfrontp, "%s %s\r\n", fmt, TELCMD(option)); 497 else 498 sprintf(nfrontp, "%s %d\r\n", fmt, option); 499 nfrontp += strlen(nfrontp); 500 return; 501 } 502 503 void 504 printsub(direction, pointer, length) 505 char direction; /* '<' or '>' */ 506 unsigned char *pointer; /* where suboption data sits */ 507 int length; /* length of suboption data */ 508 { 509 register int i; 510 char buf[512]; 511 512 if (!(diagnostic & TD_OPTIONS)) 513 return; 514 515 if (direction) { 516 sprintf(nfrontp, "td: %s suboption ", 517 direction == '<' ? "recv" : "send"); 518 nfrontp += strlen(nfrontp); 519 if (length >= 3) { 520 register int j; 521 522 i = pointer[length-2]; 523 j = pointer[length-1]; 524 525 if (i != IAC || j != SE) { 526 sprintf(nfrontp, "(terminated by "); 527 nfrontp += strlen(nfrontp); 528 if (TELOPT_OK(i)) 529 sprintf(nfrontp, "%s ", TELOPT(i)); 530 else if (TELCMD_OK(i)) 531 sprintf(nfrontp, "%s ", TELCMD(i)); 532 else 533 sprintf(nfrontp, "%d ", i); 534 nfrontp += strlen(nfrontp); 535 if (TELOPT_OK(j)) 536 sprintf(nfrontp, "%s", TELOPT(j)); 537 else if (TELCMD_OK(j)) 538 sprintf(nfrontp, "%s", TELCMD(j)); 539 else 540 sprintf(nfrontp, "%d", j); 541 nfrontp += strlen(nfrontp); 542 sprintf(nfrontp, ", not IAC SE!) "); 543 nfrontp += strlen(nfrontp); 544 } 545 } 546 length -= 2; 547 } 548 if (length < 1) { 549 sprintf(nfrontp, "(Empty suboption??\?)"); 550 nfrontp += strlen(nfrontp); 551 return; 552 } 553 switch (pointer[0]) { 554 case TELOPT_TTYPE: 555 sprintf(nfrontp, "TERMINAL-TYPE "); 556 nfrontp += strlen(nfrontp); 557 switch (pointer[1]) { 558 case TELQUAL_IS: 559 sprintf(nfrontp, "IS \"%.*s\"", length-2, (char *)pointer+2); 560 break; 561 case TELQUAL_SEND: 562 sprintf(nfrontp, "SEND"); 563 break; 564 default: 565 sprintf(nfrontp, 566 "- unknown qualifier %d (0x%x).", 567 pointer[1], pointer[1]); 568 } 569 nfrontp += strlen(nfrontp); 570 break; 571 case TELOPT_TSPEED: 572 sprintf(nfrontp, "TERMINAL-SPEED"); 573 nfrontp += strlen(nfrontp); 574 if (length < 2) { 575 sprintf(nfrontp, " (empty suboption??\?)"); 576 nfrontp += strlen(nfrontp); 577 break; 578 } 579 switch (pointer[1]) { 580 case TELQUAL_IS: 581 sprintf(nfrontp, " IS %.*s", length-2, (char *)pointer+2); 582 nfrontp += strlen(nfrontp); 583 break; 584 default: 585 if (pointer[1] == 1) 586 sprintf(nfrontp, " SEND"); 587 else 588 sprintf(nfrontp, " %d (unknown)", pointer[1]); 589 nfrontp += strlen(nfrontp); 590 for (i = 2; i < length; i++) { 591 sprintf(nfrontp, " ?%d?", pointer[i]); 592 nfrontp += strlen(nfrontp); 593 } 594 break; 595 } 596 break; 597 598 case TELOPT_LFLOW: 599 sprintf(nfrontp, "TOGGLE-FLOW-CONTROL"); 600 nfrontp += strlen(nfrontp); 601 if (length < 2) { 602 sprintf(nfrontp, " (empty suboption??\?)"); 603 nfrontp += strlen(nfrontp); 604 break; 605 } 606 switch (pointer[1]) { 607 case LFLOW_OFF: 608 sprintf(nfrontp, " OFF"); break; 609 case LFLOW_ON: 610 sprintf(nfrontp, " ON"); break; 611 case LFLOW_RESTART_ANY: 612 sprintf(nfrontp, " RESTART-ANY"); break; 613 case LFLOW_RESTART_XON: 614 sprintf(nfrontp, " RESTART-XON"); break; 615 default: 616 sprintf(nfrontp, " %d (unknown)", pointer[1]); 617 } 618 nfrontp += strlen(nfrontp); 619 for (i = 2; i < length; i++) { 620 sprintf(nfrontp, " ?%d?", pointer[i]); 621 nfrontp += strlen(nfrontp); 622 } 623 break; 624 625 case TELOPT_NAWS: 626 sprintf(nfrontp, "NAWS"); 627 nfrontp += strlen(nfrontp); 628 if (length < 2) { 629 sprintf(nfrontp, " (empty suboption??\?)"); 630 nfrontp += strlen(nfrontp); 631 break; 632 } 633 if (length == 2) { 634 sprintf(nfrontp, " ?%d?", pointer[1]); 635 nfrontp += strlen(nfrontp); 636 break; 637 } 638 sprintf(nfrontp, " %d %d (%d)", 639 pointer[1], pointer[2], 640 (int)((((unsigned int)pointer[1])<<8)|((unsigned int)pointer[2]))); 641 nfrontp += strlen(nfrontp); 642 if (length == 4) { 643 sprintf(nfrontp, " ?%d?", pointer[3]); 644 nfrontp += strlen(nfrontp); 645 break; 646 } 647 sprintf(nfrontp, " %d %d (%d)", 648 pointer[3], pointer[4], 649 (int)((((unsigned int)pointer[3])<<8)|((unsigned int)pointer[4]))); 650 nfrontp += strlen(nfrontp); 651 for (i = 5; i < length; i++) { 652 sprintf(nfrontp, " ?%d?", pointer[i]); 653 nfrontp += strlen(nfrontp); 654 } 655 break; 656 657 case TELOPT_LINEMODE: 658 sprintf(nfrontp, "LINEMODE "); 659 nfrontp += strlen(nfrontp); 660 if (length < 2) { 661 sprintf(nfrontp, " (empty suboption??\?)"); 662 nfrontp += strlen(nfrontp); 663 break; 664 } 665 switch (pointer[1]) { 666 case WILL: 667 sprintf(nfrontp, "WILL "); 668 goto common; 669 case WONT: 670 sprintf(nfrontp, "WONT "); 671 goto common; 672 case DO: 673 sprintf(nfrontp, "DO "); 674 goto common; 675 case DONT: 676 sprintf(nfrontp, "DONT "); 677 common: 678 nfrontp += strlen(nfrontp); 679 if (length < 3) { 680 sprintf(nfrontp, "(no option??\?)"); 681 nfrontp += strlen(nfrontp); 682 break; 683 } 684 switch (pointer[2]) { 685 case LM_FORWARDMASK: 686 sprintf(nfrontp, "Forward Mask"); 687 nfrontp += strlen(nfrontp); 688 for (i = 3; i < length; i++) { 689 sprintf(nfrontp, " %x", pointer[i]); 690 nfrontp += strlen(nfrontp); 691 } 692 break; 693 default: 694 sprintf(nfrontp, "%d (unknown)", pointer[2]); 695 nfrontp += strlen(nfrontp); 696 for (i = 3; i < length; i++) { 697 sprintf(nfrontp, " %d", pointer[i]); 698 nfrontp += strlen(nfrontp); 699 } 700 break; 701 } 702 break; 703 704 case LM_SLC: 705 sprintf(nfrontp, "SLC"); 706 nfrontp += strlen(nfrontp); 707 for (i = 2; i < length - 2; i += 3) { 708 if (SLC_NAME_OK(pointer[i+SLC_FUNC])) 709 sprintf(nfrontp, " %s", SLC_NAME(pointer[i+SLC_FUNC])); 710 else 711 sprintf(nfrontp, " %d", pointer[i+SLC_FUNC]); 712 nfrontp += strlen(nfrontp); 713 switch (pointer[i+SLC_FLAGS]&SLC_LEVELBITS) { 714 case SLC_NOSUPPORT: 715 sprintf(nfrontp, " NOSUPPORT"); break; 716 case SLC_CANTCHANGE: 717 sprintf(nfrontp, " CANTCHANGE"); break; 718 case SLC_VARIABLE: 719 sprintf(nfrontp, " VARIABLE"); break; 720 case SLC_DEFAULT: 721 sprintf(nfrontp, " DEFAULT"); break; 722 } 723 nfrontp += strlen(nfrontp); 724 sprintf(nfrontp, "%s%s%s", 725 pointer[i+SLC_FLAGS]&SLC_ACK ? "|ACK" : "", 726 pointer[i+SLC_FLAGS]&SLC_FLUSHIN ? "|FLUSHIN" : "", 727 pointer[i+SLC_FLAGS]&SLC_FLUSHOUT ? "|FLUSHOUT" : ""); 728 nfrontp += strlen(nfrontp); 729 if (pointer[i+SLC_FLAGS]& ~(SLC_ACK|SLC_FLUSHIN| 730 SLC_FLUSHOUT| SLC_LEVELBITS)) { 731 sprintf(nfrontp, "(0x%x)", pointer[i+SLC_FLAGS]); 732 nfrontp += strlen(nfrontp); 733 } 734 sprintf(nfrontp, " %d;", pointer[i+SLC_VALUE]); 735 nfrontp += strlen(nfrontp); 736 if ((pointer[i+SLC_VALUE] == IAC) && 737 (pointer[i+SLC_VALUE+1] == IAC)) 738 i++; 739 } 740 for (; i < length; i++) { 741 sprintf(nfrontp, " ?%d?", pointer[i]); 742 nfrontp += strlen(nfrontp); 743 } 744 break; 745 746 case LM_MODE: 747 sprintf(nfrontp, "MODE "); 748 nfrontp += strlen(nfrontp); 749 if (length < 3) { 750 sprintf(nfrontp, "(no mode??\?)"); 751 nfrontp += strlen(nfrontp); 752 break; 753 } 754 { 755 char tbuf[32]; 756 sprintf(tbuf, "%s%s%s%s%s", 757 pointer[2]&MODE_EDIT ? "|EDIT" : "", 758 pointer[2]&MODE_TRAPSIG ? "|TRAPSIG" : "", 759 pointer[2]&MODE_SOFT_TAB ? "|SOFT_TAB" : "", 760 pointer[2]&MODE_LIT_ECHO ? "|LIT_ECHO" : "", 761 pointer[2]&MODE_ACK ? "|ACK" : ""); 762 sprintf(nfrontp, "%s", tbuf[1] ? &tbuf[1] : "0"); 763 nfrontp += strlen(nfrontp); 764 } 765 if (pointer[2]&~(MODE_EDIT|MODE_TRAPSIG|MODE_ACK)) { 766 sprintf(nfrontp, " (0x%x)", pointer[2]); 767 nfrontp += strlen(nfrontp); 768 } 769 for (i = 3; i < length; i++) { 770 sprintf(nfrontp, " ?0x%x?", pointer[i]); 771 nfrontp += strlen(nfrontp); 772 } 773 break; 774 default: 775 sprintf(nfrontp, "%d (unknown)", pointer[1]); 776 nfrontp += strlen(nfrontp); 777 for (i = 2; i < length; i++) { 778 sprintf(nfrontp, " %d", pointer[i]); 779 nfrontp += strlen(nfrontp); 780 } 781 } 782 break; 783 784 case TELOPT_STATUS: { 785 register char *cp; 786 register int j, k; 787 788 sprintf(nfrontp, "STATUS"); 789 nfrontp += strlen(nfrontp); 790 791 switch (pointer[1]) { 792 default: 793 if (pointer[1] == TELQUAL_SEND) 794 sprintf(nfrontp, " SEND"); 795 else 796 sprintf(nfrontp, " %d (unknown)", pointer[1]); 797 nfrontp += strlen(nfrontp); 798 for (i = 2; i < length; i++) { 799 sprintf(nfrontp, " ?%d?", pointer[i]); 800 nfrontp += strlen(nfrontp); 801 } 802 break; 803 case TELQUAL_IS: 804 sprintf(nfrontp, " IS\r\n"); 805 nfrontp += strlen(nfrontp); 806 807 for (i = 2; i < length; i++) { 808 switch(pointer[i]) { 809 case DO: cp = "DO"; goto common2; 810 case DONT: cp = "DONT"; goto common2; 811 case WILL: cp = "WILL"; goto common2; 812 case WONT: cp = "WONT"; goto common2; 813 common2: 814 i++; 815 if (TELOPT_OK(pointer[i])) 816 sprintf(nfrontp, " %s %s", cp, TELOPT(pointer[i])); 817 else 818 sprintf(nfrontp, " %s %d", cp, pointer[i]); 819 nfrontp += strlen(nfrontp); 820 821 sprintf(nfrontp, "\r\n"); 822 nfrontp += strlen(nfrontp); 823 break; 824 825 case SB: 826 sprintf(nfrontp, " SB "); 827 nfrontp += strlen(nfrontp); 828 i++; 829 j = k = i; 830 while (j < length) { 831 if (pointer[j] == SE) { 832 if (j+1 == length) 833 break; 834 if (pointer[j+1] == SE) 835 j++; 836 else 837 break; 838 } 839 pointer[k++] = pointer[j++]; 840 } 841 printsub(0, &pointer[i], k - i); 842 if (i < length) { 843 sprintf(nfrontp, " SE"); 844 nfrontp += strlen(nfrontp); 845 i = j; 846 } else 847 i = j - 1; 848 849 sprintf(nfrontp, "\r\n"); 850 nfrontp += strlen(nfrontp); 851 852 break; 853 854 default: 855 sprintf(nfrontp, " %d", pointer[i]); 856 nfrontp += strlen(nfrontp); 857 break; 858 } 859 } 860 break; 861 } 862 break; 863 } 864 865 case TELOPT_XDISPLOC: 866 sprintf(nfrontp, "X-DISPLAY-LOCATION "); 867 nfrontp += strlen(nfrontp); 868 switch (pointer[1]) { 869 case TELQUAL_IS: 870 sprintf(nfrontp, "IS \"%.*s\"", length-2, (char *)pointer+2); 871 break; 872 case TELQUAL_SEND: 873 sprintf(nfrontp, "SEND"); 874 break; 875 default: 876 sprintf(nfrontp, "- unknown qualifier %d (0x%x).", 877 pointer[1], pointer[1]); 878 } 879 nfrontp += strlen(nfrontp); 880 break; 881 882 case TELOPT_NEW_ENVIRON: 883 sprintf(nfrontp, "NEW-ENVIRON "); 884 goto env_common1; 885 case TELOPT_OLD_ENVIRON: 886 sprintf(nfrontp, "OLD-ENVIRON"); 887 env_common1: 888 nfrontp += strlen(nfrontp); 889 switch (pointer[1]) { 890 case TELQUAL_IS: 891 sprintf(nfrontp, "IS "); 892 goto env_common; 893 case TELQUAL_SEND: 894 sprintf(nfrontp, "SEND "); 895 goto env_common; 896 case TELQUAL_INFO: 897 sprintf(nfrontp, "INFO "); 898 env_common: 899 nfrontp += strlen(nfrontp); 900 { 901 register int noquote = 2; 902 for (i = 2; i < length; i++ ) { 903 switch (pointer[i]) { 904 case NEW_ENV_VAR: 905 sprintf(nfrontp, "\" VAR " + noquote); 906 nfrontp += strlen(nfrontp); 907 noquote = 2; 908 break; 909 910 case NEW_ENV_VALUE: 911 sprintf(nfrontp, "\" VALUE " + noquote); 912 nfrontp += strlen(nfrontp); 913 noquote = 2; 914 break; 915 916 case ENV_ESC: 917 sprintf(nfrontp, "\" ESC " + noquote); 918 nfrontp += strlen(nfrontp); 919 noquote = 2; 920 break; 921 922 case ENV_USERVAR: 923 sprintf(nfrontp, "\" USERVAR " + noquote); 924 nfrontp += strlen(nfrontp); 925 noquote = 2; 926 break; 927 928 default: 929 def_case: 930 if (isprint(pointer[i]) && pointer[i] != '"') { 931 if (noquote) { 932 *nfrontp++ = '"'; 933 noquote = 0; 934 } 935 *nfrontp++ = pointer[i]; 936 } else { 937 sprintf(nfrontp, "\" %03o " + noquote, 938 pointer[i]); 939 nfrontp += strlen(nfrontp); 940 noquote = 2; 941 } 942 break; 943 } 944 } 945 if (!noquote) 946 *nfrontp++ = '"'; 947 break; 948 } 949 } 950 break; 951 952 #if defined(AUTHENTICATION) 953 case TELOPT_AUTHENTICATION: 954 sprintf(nfrontp, "AUTHENTICATION"); 955 nfrontp += strlen(nfrontp); 956 957 if (length < 2) { 958 sprintf(nfrontp, " (empty suboption??\?)"); 959 nfrontp += strlen(nfrontp); 960 break; 961 } 962 switch (pointer[1]) { 963 case TELQUAL_REPLY: 964 case TELQUAL_IS: 965 sprintf(nfrontp, " %s ", (pointer[1] == TELQUAL_IS) ? 966 "IS" : "REPLY"); 967 nfrontp += strlen(nfrontp); 968 if (AUTHTYPE_NAME_OK(pointer[2])) 969 sprintf(nfrontp, "%s ", AUTHTYPE_NAME(pointer[2])); 970 else 971 sprintf(nfrontp, "%d ", pointer[2]); 972 nfrontp += strlen(nfrontp); 973 if (length < 3) { 974 sprintf(nfrontp, "(partial suboption??\?)"); 975 nfrontp += strlen(nfrontp); 976 break; 977 } 978 sprintf(nfrontp, "%s|%s", 979 ((pointer[3] & AUTH_WHO_MASK) == AUTH_WHO_CLIENT) ? 980 "CLIENT" : "SERVER", 981 ((pointer[3] & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL) ? 982 "MUTUAL" : "ONE-WAY"); 983 nfrontp += strlen(nfrontp); 984 985 auth_printsub(&pointer[1], length - 1, buf, sizeof(buf)); 986 sprintf(nfrontp, "%s", buf); 987 nfrontp += strlen(nfrontp); 988 break; 989 990 case TELQUAL_SEND: 991 i = 2; 992 sprintf(nfrontp, " SEND "); 993 nfrontp += strlen(nfrontp); 994 while (i < length) { 995 if (AUTHTYPE_NAME_OK(pointer[i])) 996 sprintf(nfrontp, "%s ", AUTHTYPE_NAME(pointer[i])); 997 else 998 sprintf(nfrontp, "%d ", pointer[i]); 999 nfrontp += strlen(nfrontp); 1000 if (++i >= length) { 1001 sprintf(nfrontp, "(partial suboption??\?)"); 1002 nfrontp += strlen(nfrontp); 1003 break; 1004 } 1005 sprintf(nfrontp, "%s|%s ", 1006 ((pointer[i] & AUTH_WHO_MASK) == AUTH_WHO_CLIENT) ? 1007 "CLIENT" : "SERVER", 1008 ((pointer[i] & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL) ? 1009 "MUTUAL" : "ONE-WAY"); 1010 nfrontp += strlen(nfrontp); 1011 ++i; 1012 } 1013 break; 1014 1015 case TELQUAL_NAME: 1016 i = 2; 1017 sprintf(nfrontp, " NAME \""); 1018 nfrontp += strlen(nfrontp); 1019 while (i < length) 1020 *nfrontp += pointer[i++]; 1021 *nfrontp += '"'; 1022 break; 1023 1024 default: 1025 for (i = 2; i < length; i++) { 1026 sprintf(nfrontp, " ?%d?", pointer[i]); 1027 nfrontp += strlen(nfrontp); 1028 } 1029 break; 1030 } 1031 break; 1032 #endif 1033 1034 1035 default: 1036 if (TELOPT_OK(pointer[0])) 1037 sprintf(nfrontp, "%s (unknown)", TELOPT(pointer[0])); 1038 else 1039 sprintf(nfrontp, "%d (unknown)", pointer[i]); 1040 nfrontp += strlen(nfrontp); 1041 for (i = 1; i < length; i++) { 1042 sprintf(nfrontp, " %d", pointer[i]); 1043 nfrontp += strlen(nfrontp); 1044 } 1045 break; 1046 } 1047 sprintf(nfrontp, "\r\n"); 1048 nfrontp += strlen(nfrontp); 1049 } 1050 1051 /* 1052 * Dump a data buffer in hex and ascii to the output data stream. 1053 */ 1054 void 1055 printdata(tag, ptr, cnt) 1056 register char *tag; 1057 register char *ptr; 1058 register int cnt; 1059 { 1060 register int i; 1061 char xbuf[30]; 1062 1063 while (cnt) { 1064 /* flush net output buffer if no room for new data) */ 1065 if ((&netobuf[BUFSIZ] - nfrontp) < 80) { 1066 netflush(); 1067 } 1068 1069 /* add a line of output */ 1070 sprintf(nfrontp, "%s: ", tag); 1071 nfrontp += strlen(nfrontp); 1072 for (i = 0; i < 20 && cnt; i++) { 1073 sprintf(nfrontp, "%02x", *ptr); 1074 nfrontp += strlen(nfrontp); 1075 if (isprint(*ptr)) { 1076 xbuf[i] = *ptr; 1077 } else { 1078 xbuf[i] = '.'; 1079 } 1080 if (i % 2) { 1081 *nfrontp = ' '; 1082 nfrontp++; 1083 } 1084 cnt--; 1085 ptr++; 1086 } 1087 xbuf[i] = '\0'; 1088 sprintf(nfrontp, " %s\r\n", xbuf ); 1089 nfrontp += strlen(nfrontp); 1090 } 1091 } 1092 #endif /* DIAGNOSTICS */ 1093
Indexes created Thu Sep 25 16:09:42 GMT 2025