usr.bin/telnet/utilities.c

   1 /*
   2  * Copyright (c) 1988, 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 static char sccsid[] = "@(#)utilities.c 8.2 (Berkeley) 12/15/93";
  36 #endif /* not lint */
  37
  38 #define TELOPTS
  39 #define TELCMDS
  40 #define SLC_NAMES
  41 #include <arpa/telnet.h>
  42 #include <sys/types.h>
  43 #include <sys/time.h>
  44
  45 #include <ctype.h>
  46
  47 #include "general.h"
  48
  49 #include "fdset.h"
  50
  51 #include "ring.h"
  52
  53 #include "defines.h"
  54
  55 #include "externs.h"
  56
  57 FILE    *NetTrace = 0;          /* Not in bss, since needs to stay */
  58 int     prettydump;
  59
  60 /*
  61  * upcase()
  62  *
  63  *      Upcase (in place) the argument.
  64  */
  65
  66     void
  67 upcase(argument)
  68     register char *argument;
  69 {
  70     register int c;
  71
  72     while ((c = *argument) != 0) {
  73         if (islower(c)) {
  74             *argument = toupper(c);
  75         }
  76         argument++;
  77     }
  78 }
  79
  80 /*
  81  * SetSockOpt()
  82  *
  83  * Compensate for differences in 4.2 and 4.3 systems.
  84  */
  85
  86     int
  87 SetSockOpt(fd, level, option, yesno)
  88     int fd, level, option, yesno;
  89 {
  90 #ifndef NOT43
  91     return setsockopt(fd, level, option,
  92                                 (char *)&yesno, sizeof yesno);
  93 #else   /* NOT43 */
  94     if (yesno == 0) {           /* Can't do that in 4.2! */
  95         fprintf(stderr, "Error: attempt to turn off an option 0x%x.\n",
  96                                 option);
  97         return -1;
  98     }
  99     return setsockopt(fd, level, option, 0, 0);
 100 #endif  /* NOT43 */
 101 }
 102 \f
 103 /*
 104  * The following are routines used to print out debugging information.
 105  */
 106
 107 unsigned char NetTraceFile[256] = "(standard output)";
 108
 109     void
 110 SetNetTrace(file)
 111     register char *file;
 112 {
 113     if (NetTrace && NetTrace != stdout)
 114         fclose(NetTrace);
 115     if (file  && (strcmp(file, "-") != 0)) {
 116         NetTrace = fopen(file, "w");
 117         if (NetTrace) {
 118             strcpy((char *)NetTraceFile, file);
 119             return;
 120         }
 121         fprintf(stderr, "Cannot open %s.\n", file);
 122     }
 123     NetTrace = stdout;
 124     strcpy((char *)NetTraceFile, "(standard output)");
 125 }
 126
 127     void
 128 Dump(direction, buffer, length)
 129     char direction;
 130     unsigned char *buffer;
 131     int length;
 132 {
 133 #   define BYTES_PER_LINE       32
 134 #   define min(x,y)     ((x<y)? x:y)
 135     unsigned char *pThis;
 136     int offset;
 137     extern pettydump;
 138
 139     offset = 0;
 140
 141     while (length) {
 142         /* print one line */
 143         fprintf(NetTrace, "%c 0x%x\t", direction, offset);
 144         pThis = buffer;
 145         if (prettydump) {
 146             buffer = buffer + min(length, BYTES_PER_LINE/2);
 147             while (pThis < buffer) {
 148                 fprintf(NetTrace, "%c%.2x",
 149                     (((*pThis)&0xff) == 0xff) ? '*' : ' ',
 150                     (*pThis)&0xff);
 151                 pThis++;
 152             }
 153             length -= BYTES_PER_LINE/2;
 154             offset += BYTES_PER_LINE/2;
 155         } else {
 156             buffer = buffer + min(length, BYTES_PER_LINE);
 157             while (pThis < buffer) {
 158                 fprintf(NetTrace, "%.2x", (*pThis)&0xff);
 159                 pThis++;
 160             }
 161             length -= BYTES_PER_LINE;
 162             offset += BYTES_PER_LINE;
 163         }
 164         if (NetTrace == stdout) {
 165             fprintf(NetTrace, "\r\n");
 166         } else {
 167             fprintf(NetTrace, "\n");
 168         }
 169         if (length < 0) {
 170             fflush(NetTrace);
 171             return;
 172         }
 173         /* find next unique line */
 174     }
 175     fflush(NetTrace);
 176 }
 177
 178
 179         void
 180 printoption(direction, cmd, option)
 181         char *direction;
 182         int cmd, option;
 183 {
 184         if (!showoptions)
 185                 return;
 186         if (cmd == IAC) {
 187                 if (TELCMD_OK(option))
 188                     fprintf(NetTrace, "%s IAC %s", direction, TELCMD(option));
 189                 else
 190                     fprintf(NetTrace, "%s IAC %d", direction, option);
 191         } else {
 192                 register char *fmt;
 193                 fmt = (cmd == WILL) ? "WILL" : (cmd == WONT) ? "WONT" :
 194                         (cmd == DO) ? "DO" : (cmd == DONT) ? "DONT" : 0;
 195                 if (fmt) {
 196                     fprintf(NetTrace, "%s %s ", direction, fmt);
 197                     if (TELOPT_OK(option))
 198                         fprintf(NetTrace, "%s", TELOPT(option));
 199                     else if (option == TELOPT_EXOPL)
 200                         fprintf(NetTrace, "EXOPL");
 201                     else
 202                         fprintf(NetTrace, "%d", option);
 203                 } else
 204                     fprintf(NetTrace, "%s %d %d", direction, cmd, option);
 205         }
 206         if (NetTrace == stdout) {
 207             fprintf(NetTrace, "\r\n");
 208             fflush(NetTrace);
 209         } else {
 210             fprintf(NetTrace, "\n");
 211         }
 212         return;
 213 }
 214
 215     void
 216 optionstatus()
 217 {
 218     register int i;
 219     extern char will_wont_resp[], do_dont_resp[];
 220
 221     for (i = 0; i < 256; i++) {
 222         if (do_dont_resp[i]) {
 223             if (TELOPT_OK(i))
 224                 printf("resp DO_DONT %s: %d\n", TELOPT(i), do_dont_resp[i]);
 225             else if (TELCMD_OK(i))
 226                 printf("resp DO_DONT %s: %d\n", TELCMD(i), do_dont_resp[i]);
 227             else
 228                 printf("resp DO_DONT %d: %d\n", i,
 229                                 do_dont_resp[i]);
 230             if (my_want_state_is_do(i)) {
 231                 if (TELOPT_OK(i))
 232                     printf("want DO   %s\n", TELOPT(i));
 233                 else if (TELCMD_OK(i))
 234                     printf("want DO   %s\n", TELCMD(i));
 235                 else
 236                     printf("want DO   %d\n", i);
 237             } else {
 238                 if (TELOPT_OK(i))
 239                     printf("want DONT %s\n", TELOPT(i));
 240                 else if (TELCMD_OK(i))
 241                     printf("want DONT %s\n", TELCMD(i));
 242                 else
 243                     printf("want DONT %d\n", i);
 244             }
 245         } else {
 246             if (my_state_is_do(i)) {
 247                 if (TELOPT_OK(i))
 248                     printf("     DO   %s\n", TELOPT(i));
 249                 else if (TELCMD_OK(i))
 250                     printf("     DO   %s\n", TELCMD(i));
 251                 else
 252                     printf("     DO   %d\n", i);
 253             }
 254         }
 255         if (will_wont_resp[i]) {
 256             if (TELOPT_OK(i))
 257                 printf("resp WILL_WONT %s: %d\n", TELOPT(i), will_wont_resp[i]);
 258             else if (TELCMD_OK(i))
 259                 printf("resp WILL_WONT %s: %d\n", TELCMD(i), will_wont_resp[i]);
 260             else
 261                 printf("resp WILL_WONT %d: %d\n",
 262                                 i, will_wont_resp[i]);
 263             if (my_want_state_is_will(i)) {
 264                 if (TELOPT_OK(i))
 265                     printf("want WILL %s\n", TELOPT(i));
 266                 else if (TELCMD_OK(i))
 267                     printf("want WILL %s\n", TELCMD(i));
 268                 else
 269                     printf("want WILL %d\n", i);
 270             } else {
 271                 if (TELOPT_OK(i))
 272                     printf("want WONT %s\n", TELOPT(i));
 273                 else if (TELCMD_OK(i))
 274                     printf("want WONT %s\n", TELCMD(i));
 275                 else
 276                     printf("want WONT %d\n", i);
 277             }
 278         } else {
 279             if (my_state_is_will(i)) {
 280                 if (TELOPT_OK(i))
 281                     printf("     WILL %s\n", TELOPT(i));
 282                 else if (TELCMD_OK(i))
 283                     printf("     WILL %s\n", TELCMD(i));
 284                 else
 285                     printf("     WILL %d\n", i);
 286             }
 287         }
 288     }
 289
 290 }
 291
 292     void
 293 printsub(direction, pointer, length)
 294     char direction;     /* '<' or '>' */
 295     unsigned char *pointer;     /* where suboption data sits */
 296     int           length;       /* length of suboption data */
 297 {
 298     register int i;
 299     char buf[512];
 300     extern int want_status_response;
 301
 302     if (showoptions || direction == 0 ||
 303         (want_status_response && (pointer[0] == TELOPT_STATUS))) {
 304         if (direction) {
 305             fprintf(NetTrace, "%s IAC SB ",
 306                                 (direction == '<')? "RCVD":"SENT");
 307             if (length >= 3) {
 308                 register int j;
 309
 310                 i = pointer[length-2];
 311                 j = pointer[length-1];
 312
 313                 if (i != IAC || j != SE) {
 314                     fprintf(NetTrace, "(terminated by ");
 315                     if (TELOPT_OK(i))
 316                         fprintf(NetTrace, "%s ", TELOPT(i));
 317                     else if (TELCMD_OK(i))
 318                         fprintf(NetTrace, "%s ", TELCMD(i));
 319                     else
 320                         fprintf(NetTrace, "%d ", i);
 321                     if (TELOPT_OK(j))
 322                         fprintf(NetTrace, "%s", TELOPT(j));
 323                     else if (TELCMD_OK(j))
 324                         fprintf(NetTrace, "%s", TELCMD(j));
 325                     else
 326                         fprintf(NetTrace, "%d", j);
 327                     fprintf(NetTrace, ", not IAC SE!) ");
 328                 }
 329             }
 330             length -= 2;
 331         }
 332         if (length < 1) {
 333             fprintf(NetTrace, "(Empty suboption??\?)");
 334             if (NetTrace == stdout)
 335                 fflush(NetTrace);
 336             return;
 337         }
 338         switch (pointer[0]) {
 339         case TELOPT_TTYPE:
 340             fprintf(NetTrace, "TERMINAL-TYPE ");
 341             switch (pointer[1]) {
 342             case TELQUAL_IS:
 343                 fprintf(NetTrace, "IS \"%.*s\"", length-2, (char *)pointer+2);
 344                 break;
 345             case TELQUAL_SEND:
 346                 fprintf(NetTrace, "SEND");
 347                 break;
 348             default:
 349                 fprintf(NetTrace,
 350                                 "- unknown qualifier %d (0x%x).",
 351                                 pointer[1], pointer[1]);
 352             }
 353             break;
 354         case TELOPT_TSPEED:
 355             fprintf(NetTrace, "TERMINAL-SPEED");
 356             if (length < 2) {
 357                 fprintf(NetTrace, " (empty suboption??\?)");
 358                 break;
 359             }
 360             switch (pointer[1]) {
 361             case TELQUAL_IS:
 362                 fprintf(NetTrace, " IS ");
 363                 fprintf(NetTrace, "%.*s", length-2, (char *)pointer+2);
 364                 break;
 365             default:
 366                 if (pointer[1] == 1)
 367                     fprintf(NetTrace, " SEND");
 368                 else
 369                     fprintf(NetTrace, " %d (unknown)", pointer[1]);
 370                 for (i = 2; i < length; i++)
 371                     fprintf(NetTrace, " ?%d?", pointer[i]);
 372                 break;
 373             }
 374             break;
 375
 376         case TELOPT_LFLOW:
 377             fprintf(NetTrace, "TOGGLE-FLOW-CONTROL");
 378             if (length < 2) {
 379                 fprintf(NetTrace, " (empty suboption??\?)");
 380                 break;
 381             }
 382             switch (pointer[1]) {
 383             case LFLOW_OFF:
 384                 fprintf(NetTrace, " OFF"); break;
 385             case LFLOW_ON:
 386                 fprintf(NetTrace, " ON"); break;
 387             case LFLOW_RESTART_ANY:
 388                 fprintf(NetTrace, " RESTART-ANY"); break;
 389             case LFLOW_RESTART_XON:
 390                 fprintf(NetTrace, " RESTART-XON"); break;
 391             default:
 392                 fprintf(NetTrace, " %d (unknown)", pointer[1]);
 393             }
 394             for (i = 2; i < length; i++)
 395                 fprintf(NetTrace, " ?%d?", pointer[i]);
 396             break;
 397
 398         case TELOPT_NAWS:
 399             fprintf(NetTrace, "NAWS");
 400             if (length < 2) {
 401                 fprintf(NetTrace, " (empty suboption??\?)");
 402                 break;
 403             }
 404             if (length == 2) {
 405                 fprintf(NetTrace, " ?%d?", pointer[1]);
 406                 break;
 407             }
 408             fprintf(NetTrace, " %d %d (%d)",
 409                 pointer[1], pointer[2],
 410                 (int)((((unsigned int)pointer[1])<<8)|((unsigned int)pointer[2])));
 411             if (length == 4) {
 412                 fprintf(NetTrace, " ?%d?", pointer[3]);
 413                 break;
 414             }
 415             fprintf(NetTrace, " %d %d (%d)",
 416                 pointer[3], pointer[4],
 417                 (int)((((unsigned int)pointer[3])<<8)|((unsigned int)pointer[4])));
 418             for (i = 5; i < length; i++)
 419                 fprintf(NetTrace, " ?%d?", pointer[i]);
 420             break;
 421
 422 #if     defined(AUTHENTICATION)
 423         case TELOPT_AUTHENTICATION:
 424             fprintf(NetTrace, "AUTHENTICATION");
 425             if (length < 2) {
 426                 fprintf(NetTrace, " (empty suboption??\?)");
 427                 break;
 428             }
 429             switch (pointer[1]) {
 430             case TELQUAL_REPLY:
 431             case TELQUAL_IS:
 432                 fprintf(NetTrace, " %s ", (pointer[1] == TELQUAL_IS) ?
 433                                                         "IS" : "REPLY");
 434                 if (AUTHTYPE_NAME_OK(pointer[2]))
 435                     fprintf(NetTrace, "%s ", AUTHTYPE_NAME(pointer[2]));
 436                 else
 437                     fprintf(NetTrace, "%d ", pointer[2]);
 438                 if (length < 3) {
 439                     fprintf(NetTrace, "(partial suboption??\?)");
 440                     break;
 441                 }
 442                 fprintf(NetTrace, "%s|%s",
 443                         ((pointer[3] & AUTH_WHO_MASK) == AUTH_WHO_CLIENT) ?
 444                         "CLIENT" : "SERVER",
 445                         ((pointer[3] & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL) ?
 446                         "MUTUAL" : "ONE-WAY");
 447
 448                 auth_printsub(&pointer[1], length - 1, buf, sizeof(buf));
 449                 fprintf(NetTrace, "%s", buf);
 450                 break;
 451
 452             case TELQUAL_SEND:
 453                 i = 2;
 454                 fprintf(NetTrace, " SEND ");
 455                 while (i < length) {
 456                     if (AUTHTYPE_NAME_OK(pointer[i]))
 457                         fprintf(NetTrace, "%s ", AUTHTYPE_NAME(pointer[i]));
 458                     else
 459                         fprintf(NetTrace, "%d ", pointer[i]);
 460                     if (++i >= length) {
 461                         fprintf(NetTrace, "(partial suboption??\?)");
 462                         break;
 463                     }
 464                     fprintf(NetTrace, "%s|%s ",
 465                         ((pointer[i] & AUTH_WHO_MASK) == AUTH_WHO_CLIENT) ?
 466                                                         "CLIENT" : "SERVER",
 467                         ((pointer[i] & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL) ?
 468                                                         "MUTUAL" : "ONE-WAY");
 469                     ++i;
 470                 }
 471                 break;
 472
 473             case TELQUAL_NAME:
 474                 i = 2;
 475                 fprintf(NetTrace, " NAME \"");
 476                 while (i < length)
 477                     putc(pointer[i++], NetTrace);
 478                 putc('"', NetTrace);
 479                 break;
 480
 481             default:
 482                     for (i = 2; i < length; i++)
 483                         fprintf(NetTrace, " ?%d?", pointer[i]);
 484                     break;
 485             }
 486             break;
 487 #endif
 488
 489
 490         case TELOPT_LINEMODE:
 491             fprintf(NetTrace, "LINEMODE ");
 492             if (length < 2) {
 493                 fprintf(NetTrace, " (empty suboption??\?)");
 494                 break;
 495             }
 496             switch (pointer[1]) {
 497             case WILL:
 498                 fprintf(NetTrace, "WILL ");
 499                 goto common;
 500             case WONT:
 501                 fprintf(NetTrace, "WONT ");
 502                 goto common;
 503             case DO:
 504                 fprintf(NetTrace, "DO ");
 505                 goto common;
 506             case DONT:
 507                 fprintf(NetTrace, "DONT ");
 508             common:
 509                 if (length < 3) {
 510                     fprintf(NetTrace, "(no option??\?)");
 511                     break;
 512                 }
 513                 switch (pointer[2]) {
 514                 case LM_FORWARDMASK:
 515                     fprintf(NetTrace, "Forward Mask");
 516                     for (i = 3; i < length; i++)
 517                         fprintf(NetTrace, " %x", pointer[i]);
 518                     break;
 519                 default:
 520                     fprintf(NetTrace, "%d (unknown)", pointer[2]);
 521                     for (i = 3; i < length; i++)
 522                         fprintf(NetTrace, " %d", pointer[i]);
 523                     break;
 524                 }
 525                 break;
 526
 527             case LM_SLC:
 528                 fprintf(NetTrace, "SLC");
 529                 for (i = 2; i < length - 2; i += 3) {
 530                     if (SLC_NAME_OK(pointer[i+SLC_FUNC]))
 531                         fprintf(NetTrace, " %s", SLC_NAME(pointer[i+SLC_FUNC]));
 532                     else
 533                         fprintf(NetTrace, " %d", pointer[i+SLC_FUNC]);
 534                     switch (pointer[i+SLC_FLAGS]&SLC_LEVELBITS) {
 535                     case SLC_NOSUPPORT:
 536                         fprintf(NetTrace, " NOSUPPORT"); break;
 537                     case SLC_CANTCHANGE:
 538                         fprintf(NetTrace, " CANTCHANGE"); break;
 539                     case SLC_VARIABLE:
 540                         fprintf(NetTrace, " VARIABLE"); break;
 541                     case SLC_DEFAULT:
 542                         fprintf(NetTrace, " DEFAULT"); break;
 543                     }
 544                     fprintf(NetTrace, "%s%s%s",
 545                         pointer[i+SLC_FLAGS]&SLC_ACK ? "|ACK" : "",
 546                         pointer[i+SLC_FLAGS]&SLC_FLUSHIN ? "|FLUSHIN" : "",
 547                         pointer[i+SLC_FLAGS]&SLC_FLUSHOUT ? "|FLUSHOUT" : "");
 548                     if (pointer[i+SLC_FLAGS]& ~(SLC_ACK|SLC_FLUSHIN|
 549                                                 SLC_FLUSHOUT| SLC_LEVELBITS))
 550                         fprintf(NetTrace, "(0x%x)", pointer[i+SLC_FLAGS]);
 551                     fprintf(NetTrace, " %d;", pointer[i+SLC_VALUE]);
 552                     if ((pointer[i+SLC_VALUE] == IAC) &&
 553                         (pointer[i+SLC_VALUE+1] == IAC))
 554                                 i++;
 555                 }
 556                 for (; i < length; i++)
 557                     fprintf(NetTrace, " ?%d?", pointer[i]);
 558                 break;
 559
 560             case LM_MODE:
 561                 fprintf(NetTrace, "MODE ");
 562                 if (length < 3) {
 563                     fprintf(NetTrace, "(no mode??\?)");
 564                     break;
 565                 }
 566                 {
 567                     char tbuf[64];
 568                     sprintf(tbuf, "%s%s%s%s%s",
 569                         pointer[2]&MODE_EDIT ? "|EDIT" : "",
 570                         pointer[2]&MODE_TRAPSIG ? "|TRAPSIG" : "",
 571                         pointer[2]&MODE_SOFT_TAB ? "|SOFT_TAB" : "",
 572                         pointer[2]&MODE_LIT_ECHO ? "|LIT_ECHO" : "",
 573                         pointer[2]&MODE_ACK ? "|ACK" : "");
 574                     fprintf(NetTrace, "%s", tbuf[1] ? &tbuf[1] : "0");
 575                 }
 576                 if (pointer[2]&~(MODE_MASK))
 577                     fprintf(NetTrace, " (0x%x)", pointer[2]);
 578                 for (i = 3; i < length; i++)
 579                     fprintf(NetTrace, " ?0x%x?", pointer[i]);
 580                 break;
 581             default:
 582                 fprintf(NetTrace, "%d (unknown)", pointer[1]);
 583                 for (i = 2; i < length; i++)
 584                     fprintf(NetTrace, " %d", pointer[i]);
 585             }
 586             break;
 587
 588         case TELOPT_STATUS: {
 589             register char *cp;
 590             register int j, k;
 591
 592             fprintf(NetTrace, "STATUS");
 593
 594             switch (pointer[1]) {
 595             default:
 596                 if (pointer[1] == TELQUAL_SEND)
 597                     fprintf(NetTrace, " SEND");
 598                 else
 599                     fprintf(NetTrace, " %d (unknown)", pointer[1]);
 600                 for (i = 2; i < length; i++)
 601                     fprintf(NetTrace, " ?%d?", pointer[i]);
 602                 break;
 603             case TELQUAL_IS:
 604                 if (--want_status_response < 0)
 605                     want_status_response = 0;
 606                 if (NetTrace == stdout)
 607                     fprintf(NetTrace, " IS\r\n");
 608                 else
 609                     fprintf(NetTrace, " IS\n");
 610
 611                 for (i = 2; i < length; i++) {
 612                     switch(pointer[i]) {
 613                     case DO:    cp = "DO"; goto common2;
 614                     case DONT:  cp = "DONT"; goto common2;
 615                     case WILL:  cp = "WILL"; goto common2;
 616                     case WONT:  cp = "WONT"; goto common2;
 617                     common2:
 618                         i++;
 619                         if (TELOPT_OK((int)pointer[i]))
 620                             fprintf(NetTrace, " %s %s", cp, TELOPT(pointer[i]));
 621                         else
 622                             fprintf(NetTrace, " %s %d", cp, pointer[i]);
 623
 624                         if (NetTrace == stdout)
 625                             fprintf(NetTrace, "\r\n");
 626                         else
 627                             fprintf(NetTrace, "\n");
 628                         break;
 629
 630                     case SB:
 631                         fprintf(NetTrace, " SB ");
 632                         i++;
 633                         j = k = i;
 634                         while (j < length) {
 635                             if (pointer[j] == SE) {
 636                                 if (j+1 == length)
 637                                     break;
 638                                 if (pointer[j+1] == SE)
 639                                     j++;
 640                                 else
 641                                     break;
 642                             }
 643                             pointer[k++] = pointer[j++];
 644                         }
 645                         printsub(0, &pointer[i], k - i);
 646                         if (i < length) {
 647                             fprintf(NetTrace, " SE");
 648                             i = j;
 649                         } else
 650                             i = j - 1;
 651
 652                         if (NetTrace == stdout)
 653                             fprintf(NetTrace, "\r\n");
 654                         else
 655                             fprintf(NetTrace, "\n");
 656
 657                         break;
 658
 659                     default:
 660                         fprintf(NetTrace, " %d", pointer[i]);
 661                         break;
 662                     }
 663                 }
 664                 break;
 665             }
 666             break;
 667           }
 668
 669         case TELOPT_XDISPLOC:
 670             fprintf(NetTrace, "X-DISPLAY-LOCATION ");
 671             switch (pointer[1]) {
 672             case TELQUAL_IS:
 673                 fprintf(NetTrace, "IS \"%.*s\"", length-2, (char *)pointer+2);
 674                 break;
 675             case TELQUAL_SEND:
 676                 fprintf(NetTrace, "SEND");
 677                 break;
 678             default:
 679                 fprintf(NetTrace, "- unknown qualifier %d (0x%x).",
 680                                 pointer[1], pointer[1]);
 681             }
 682             break;
 683
 684         case TELOPT_NEW_ENVIRON:
 685             fprintf(NetTrace, "NEW-ENVIRON ");
 686 #ifdef  OLD_ENVIRON
 687             goto env_common1;
 688         case TELOPT_OLD_ENVIRON:
 689             fprintf(NetTrace, "OLD-ENVIRON");
 690         env_common1:
 691 #endif
 692             switch (pointer[1]) {
 693             case TELQUAL_IS:
 694                 fprintf(NetTrace, "IS ");
 695                 goto env_common;
 696             case TELQUAL_SEND:
 697                 fprintf(NetTrace, "SEND ");
 698                 goto env_common;
 699             case TELQUAL_INFO:
 700                 fprintf(NetTrace, "INFO ");
 701             env_common:
 702                 {
 703                     register int noquote = 2;
 704 #if defined(ENV_HACK) && defined(OLD_ENVIRON)
 705                     extern int old_env_var, old_env_value;
 706 #endif
 707                     for (i = 2; i < length; i++ ) {
 708                         switch (pointer[i]) {
 709                         case NEW_ENV_VALUE:
 710 #ifdef OLD_ENVIRON
 711                      /* case NEW_ENV_OVAR: */
 712                             if (pointer[0] == TELOPT_OLD_ENVIRON) {
 713 # ifdef ENV_HACK
 714                                 if (old_env_var == OLD_ENV_VALUE)
 715                                     fprintf(NetTrace, "\" (VALUE) " + noquote);
 716                                 else
 717 # endif
 718                                     fprintf(NetTrace, "\" VAR " + noquote);
 719                             } else
 720 #endif /* OLD_ENVIRON */
 721                                 fprintf(NetTrace, "\" VALUE " + noquote);
 722                             noquote = 2;
 723                             break;
 724
 725                         case NEW_ENV_VAR:
 726 #ifdef OLD_ENVIRON
 727                      /* case OLD_ENV_VALUE: */
 728                             if (pointer[0] == TELOPT_OLD_ENVIRON) {
 729 # ifdef ENV_HACK
 730                                 if (old_env_value == OLD_ENV_VAR)
 731                                     fprintf(NetTrace, "\" (VAR) " + noquote);
 732                                 else
 733 # endif
 734                                     fprintf(NetTrace, "\" VALUE " + noquote);
 735                             } else
 736 #endif /* OLD_ENVIRON */
 737                                 fprintf(NetTrace, "\" VAR " + noquote);
 738                             noquote = 2;
 739                             break;
 740
 741                         case ENV_ESC:
 742                             fprintf(NetTrace, "\" ESC " + noquote);
 743                             noquote = 2;
 744                             break;
 745
 746                         case ENV_USERVAR:
 747                             fprintf(NetTrace, "\" USERVAR " + noquote);
 748                             noquote = 2;
 749                             break;
 750
 751                         default:
 752                         def_case:
 753                             if (isprint(pointer[i]) && pointer[i] != '"') {
 754                                 if (noquote) {
 755                                     putc('"', NetTrace);
 756                                     noquote = 0;
 757                                 }
 758                                 putc(pointer[i], NetTrace);
 759                             } else {
 760                                 fprintf(NetTrace, "\" %03o " + noquote,
 761                                                         pointer[i]);
 762                                 noquote = 2;
 763                             }
 764                             break;
 765                         }
 766                     }
 767                     if (!noquote)
 768                         putc('"', NetTrace);
 769                     break;
 770                 }
 771             }
 772             break;
 773
 774         default:
 775             if (TELOPT_OK(pointer[0]))
 776                 fprintf(NetTrace, "%s (unknown)", TELOPT(pointer[0]));
 777             else
 778                 fprintf(NetTrace, "%d (unknown)", pointer[0]);
 779             for (i = 1; i < length; i++)
 780                 fprintf(NetTrace, " %d", pointer[i]);
 781             break;
 782         }
 783         if (direction) {
 784             if (NetTrace == stdout)
 785                 fprintf(NetTrace, "\r\n");
 786             else
 787                 fprintf(NetTrace, "\n");
 788         }
 789         if (NetTrace == stdout)
 790             fflush(NetTrace);
 791     }
 792 }
 793
 794 /* EmptyTerminal - called to make sure that the terminal buffer is empty.
 795  *                      Note that we consider the buffer to run all the
 796  *                      way to the kernel (thus the select).
 797  */
 798
 799     void
 800 EmptyTerminal()
 801 {
 802 #if     defined(unix)
 803     fd_set      o;
 804
 805     FD_ZERO(&o);
 806 #endif  /* defined(unix) */
 807
 808     if (TTYBYTES() == 0) {
 809 #if     defined(unix)
 810         FD_SET(tout, &o);
 811         (void) select(tout+1, (fd_set *) 0, &o, (fd_set *) 0,
 812                         (struct timeval *) 0);  /* wait for TTLOWAT */
 813 #endif  /* defined(unix) */
 814     } else {
 815         while (TTYBYTES()) {
 816             (void) ttyflush(0);
 817 #if     defined(unix)
 818             FD_SET(tout, &o);
 819             (void) select(tout+1, (fd_set *) 0, &o, (fd_set *) 0,
 820                                 (struct timeval *) 0);  /* wait for TTLOWAT */
 821 #endif  /* defined(unix) */
 822         }
 823     }
 824 }
 825
 826     void
 827 SetForExit()
 828 {
 829     setconnmode(0);
 830 #if     defined(TN3270)
 831     if (In3270) {
 832         Finish3270();
 833     }
 834 #else   /* defined(TN3270) */
 835     do {
 836         (void)telrcv();                 /* Process any incoming data */
 837         EmptyTerminal();
 838     } while (ring_full_count(&netiring));       /* While there is any */
 839 #endif  /* defined(TN3270) */
 840     setcommandmode();
 841     fflush(stdout);
 842     fflush(stderr);
 843 #if     defined(TN3270)
 844     if (In3270) {
 845         StopScreen(1);
 846     }
 847 #endif  /* defined(TN3270) */
 848     setconnmode(0);
 849     EmptyTerminal();                    /* Flush the path to the tty */
 850     setcommandmode();
 851 }
 852
 853     void
 854 Exit(returnCode)
 855     int returnCode;
 856 {
 857     SetForExit();
 858     exit(returnCode);
 859 }
 860
 861     void
 862 ExitString(string, returnCode)
 863     char *string;
 864     int returnCode;
 865 {
 866     SetForExit();
 867     fwrite(string, 1, strlen(string), stderr);
 868     exit(returnCode);
 869 }