1 /* 2 * Copyright (c) 1988, 1990 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[] = "@(#)commands.c 5.5 (Berkeley) 3/22/91"; 36 #endif /* not lint */ 37 38 #if defined(unix) 39 #include <sys/param.h> 40 #ifdef CRAY 41 #include <sys/types.h> 42 #endif 43 #include <sys/file.h> 44 #else 45 #include <sys/types.h> 46 #endif /* defined(unix) */ 47 #include <sys/socket.h> 48 #include <netinet/in.h> 49 #ifdef CRAY 50 #include <fcntl.h> 51 #endif /* CRAY */ 52 53 #include <signal.h> 54 #include <netdb.h> 55 #include <ctype.h> 56 #include <pwd.h> 57 #include <varargs.h> 58 #include <errno.h> 59 60 #include <arpa/inet.h> 61 #include <arpa/telnet.h> 62 63 #include "general.h" 64 65 #include "ring.h" 66 67 #include "externs.h" 68 #include "defines.h" 69 #include "types.h" 70 71 #ifndef CRAY 72 #include <netinet/in_systm.h> 73 # if (defined(vax) || defined(tahoe) || defined(hp300)) && !defined(ultrix) 74 # include <machine/endian.h> 75 # endif /* vax */ 76 #endif /* CRAY */ 77 #include <netinet/ip.h> 78 79 80 #ifndef MAXHOSTNAMELEN 81 #define MAXHOSTNAMELEN 64 82 #endif MAXHOSTNAMELEN 83 84 #if defined(IPPROTO_IP) && defined(IP_TOS) 85 int tos = -1; 86 #endif /* defined(IPPROTO_IP) && defined(IP_TOS) */ 87 88 char *hostname; 89 static char _hostname[MAXHOSTNAMELEN]; 90 91 extern char *getenv(); 92 93 extern int isprefix(); 94 extern char **genget(); 95 extern int Ambiguous(); 96 97 static call(); 98 99 typedef struct { 100 char *name; /* command name */ 101 char *help; /* help string (NULL for no help) */ 102 int (*handler)(); /* routine which executes command */ 103 int needconnect; /* Do we need to be connected to execute? */ 104 } Command; 105 106 static char line[256]; 107 static char saveline[256]; 108 static int margc; 109 static char *margv[20]; 110 111 static void 112 makeargv() 113 { 114 register char *cp, *cp2, c; 115 register char **argp = margv; 116 117 margc = 0; 118 cp = line; 119 if (*cp == '!') { /* Special case shell escape */ 120 strcpy(saveline, line); /* save for shell command */ 121 *argp++ = "!"; /* No room in string to get this */ 122 margc++; 123 cp++; 124 } 125 while (c = *cp) { 126 register int inquote = 0; 127 while (isspace(c)) 128 c = *++cp; 129 if (c == '\0') 130 break; 131 *argp++ = cp; 132 margc += 1; 133 for (cp2 = cp; c != '\0'; c = *++cp) { 134 if (inquote) { 135 if (c == inquote) { 136 inquote = 0; 137 continue; 138 } 139 } else { 140 if (c == '\\') { 141 if ((c = *++cp) == '\0') 142 break; 143 } else if (c == '"') { 144 inquote = '"'; 145 continue; 146 } else if (c == '\'') { 147 inquote = '\''; 148 continue; 149 } else if (isspace(c)) 150 break; 151 } 152 *cp2++ = c; 153 } 154 *cp2 = '\0'; 155 if (c == '\0') 156 break; 157 cp++; 158 } 159 *argp++ = 0; 160 } 161 162 /* 163 * Make a character string into a number. 164 * 165 * Todo: 1. Could take random integers (12, 0x12, 012, 0b1). 166 */ 167 168 static 169 special(s) 170 register char *s; 171 { 172 register char c; 173 char b; 174 175 switch (*s) { 176 case '^': 177 b = *++s; 178 if (b == '?') { 179 c = b | 0x40; /* DEL */ 180 } else { 181 c = b & 0x1f; 182 } 183 break; 184 default: 185 c = *s; 186 break; 187 } 188 return c; 189 } 190 191 /* 192 * Construct a control character sequence 193 * for a special character. 194 */ 195 static char * 196 control(c) 197 register cc_t c; 198 { 199 static char buf[5]; 200 /* 201 * The only way I could get the Sun 3.5 compiler 202 * to shut up about 203 * if ((unsigned int)c >= 0x80) 204 * was to assign "c" to an unsigned int variable... 205 * Arggg.... 206 */ 207 register unsigned int uic = (unsigned int)c; 208 209 if (uic == 0x7f) 210 return ("^?"); 211 if (c == (cc_t)_POSIX_VDISABLE) { 212 return "off"; 213 } 214 if (uic >= 0x80) { 215 buf[0] = '\\'; 216 buf[1] = ((c>>6)&07) + '0'; 217 buf[2] = ((c>>3)&07) + '0'; 218 buf[3] = (c&07) + '0'; 219 buf[4] = 0; 220 } else if (uic >= 0x20) { 221 buf[0] = c; 222 buf[1] = 0; 223 } else { 224 buf[0] = '^'; 225 buf[1] = '@'+c; 226 buf[2] = 0; 227 } 228 return (buf); 229 } 230 231 232 233 /* 234 * The following are data structures and routines for 235 * the "send" command. 236 * 237 */ 238 239 struct sendlist { 240 char *name; /* How user refers to it (case independent) */ 241 char *help; /* Help information (0 ==> no help) */ 242 int needconnect; /* Need to be connected */ 243 int narg; /* Number of arguments */ 244 int (*handler)(); /* Routine to perform (for special ops) */ 245 int nbyte; /* Number of bytes to send this command */ 246 int what; /* Character to be sent (<0 ==> special) */ 247 }; 248 249 250 static int 251 send_esc P((void)), 252 send_help P((void)), 253 send_docmd P((char *)), 254 send_dontcmd P((char *)), 255 send_willcmd P((char *)), 256 send_wontcmd P((char *)); 257 258 extern int 259 send_do P((int, int)), 260 send_dont P((int, int)), 261 send_will P((int, int)), 262 send_wont P((int, int)); 263 264 static struct sendlist Sendlist[] = { 265 { "ao", "Send Telnet Abort output", 1, 0, 0, 2, AO }, 266 { "ayt", "Send Telnet 'Are You There'", 1, 0, 0, 2, AYT }, 267 { "brk", "Send Telnet Break", 1, 0, 0, 2, BREAK }, 268 { "break", 0, 1, 0, 0, 2, BREAK }, 269 { "ec", "Send Telnet Erase Character", 1, 0, 0, 2, EC }, 270 { "el", "Send Telnet Erase Line", 1, 0, 0, 2, EL }, 271 { "escape", "Send current escape character", 1, 0, send_esc, 1, 0 }, 272 { "ga", "Send Telnet 'Go Ahead' sequence", 1, 0, 0, 2, GA }, 273 { "ip", "Send Telnet Interrupt Process", 1, 0, 0, 2, IP }, 274 { "intp", 0, 1, 0, 0, 2, IP }, 275 { "interrupt", 0, 1, 0, 0, 2, IP }, 276 { "intr", 0, 1, 0, 0, 2, IP }, 277 { "nop", "Send Telnet 'No operation'", 1, 0, 0, 2, NOP }, 278 { "eor", "Send Telnet 'End of Record'", 1, 0, 0, 2, EOR }, 279 { "abort", "Send Telnet 'Abort Process'", 1, 0, 0, 2, ABORT }, 280 { "susp", "Send Telnet 'Suspend Process'", 1, 0, 0, 2, SUSP }, 281 { "eof", "Send Telnet End of File Character", 1, 0, 0, 2, xEOF }, 282 { "synch", "Perform Telnet 'Synch operation'", 1, 0, dosynch, 2, 0 }, 283 { "getstatus", "Send request for STATUS", 1, 0, get_status, 6, 0 }, 284 { "?", "Display send options", 0, 0, send_help, 0, 0 }, 285 { "help", 0, 0, 0, send_help, 0, 0 }, 286 { "do", 0, 0, 1, send_docmd, 3, 0 }, 287 { "dont", 0, 0, 1, send_dontcmd, 3, 0 }, 288 { "will", 0, 0, 1, send_willcmd, 3, 0 }, 289 { "wont", 0, 0, 1, send_wontcmd, 3, 0 }, 290 { 0 } 291 }; 292 293 #define GETSEND(name) ((struct sendlist *) genget(name, (char **) Sendlist, \ 294 sizeof(struct sendlist))) 295 296 static int 297 sendcmd(argc, argv) 298 int argc; 299 char **argv; 300 { 301 int count; /* how many bytes we are going to need to send */ 302 int i; 303 int question = 0; /* was at least one argument a question */ 304 struct sendlist *s; /* pointer to current command */ 305 int success = 0; 306 int needconnect = 0; 307 308 if (argc < 2) { 309 printf("need at least one argument for 'send' command\n"); 310 printf("'send ?' for help\n"); 311 return 0; 312 } 313 /* 314 * First, validate all the send arguments. 315 * In addition, we see how much space we are going to need, and 316 * whether or not we will be doing a "SYNCH" operation (which 317 * flushes the network queue). 318 */ 319 count = 0; 320 for (i = 1; i < argc; i++) { 321 s = GETSEND(argv[i]); 322 if (s == 0) { 323 printf("Unknown send argument '%s'\n'send ?' for help.\n", 324 argv[i]); 325 return 0; 326 } else if (Ambiguous(s)) { 327 printf("Ambiguous send argument '%s'\n'send ?' for help.\n", 328 argv[i]); 329 return 0; 330 } 331 if (i + s->narg >= argc) { 332 fprintf(stderr, 333 "Need %d argument%s to 'send %s' command. 'send %s ?' for help.\n", 334 s->narg, s->narg == 1 ? "" : "s", s->name, s->name); 335 return 0; 336 } 337 count += s->nbyte; 338 if (s->handler == send_help) { 339 send_help(); 340 return 0; 341 } 342 343 i += s->narg; 344 needconnect += s->needconnect; 345 } 346 if (!connected && needconnect) { 347 printf("?Need to be connected first.\n"); 348 printf("'send ?' for help\n"); 349 return 0; 350 } 351 /* Now, do we have enough room? */ 352 if (NETROOM() < count) { 353 printf("There is not enough room in the buffer TO the network\n"); 354 printf("to process your request. Nothing will be done.\n"); 355 printf("('send synch' will throw away most data in the network\n"); 356 printf("buffer, if this might help.)\n"); 357 return 0; 358 } 359 /* OK, they are all OK, now go through again and actually send */ 360 count = 0; 361 for (i = 1; i < argc; i++) { 362 if ((s = GETSEND(argv[i])) == 0) { 363 fprintf(stderr, "Telnet 'send' error - argument disappeared!\n"); 364 (void) quit(); 365 /*NOTREACHED*/ 366 } 367 if (s->handler) { 368 count++; 369 success += (*s->handler)((s->narg > 0) ? argv[i+1] : 0, 370 (s->narg > 1) ? argv[i+2] : 0); 371 i += s->narg; 372 } else { 373 NET2ADD(IAC, s->what); 374 printoption("SENT", IAC, s->what); 375 } 376 } 377 return (count == success); 378 } 379 380 static int 381 send_esc() 382 { 383 NETADD(escape); 384 return 1; 385 } 386 387 static int 388 send_docmd(name) 389 char *name; 390 { 391 return(send_tncmd(send_do, "do", name)); 392 } 393 394 static int 395 send_dontcmd(name) 396 char *name; 397 { 398 return(send_tncmd(send_dont, "dont", name)); 399 } 400 static int 401 send_willcmd(name) 402 char *name; 403 { 404 return(send_tncmd(send_will, "will", name)); 405 } 406 static int 407 send_wontcmd(name) 408 char *name; 409 { 410 return(send_tncmd(send_wont, "wont", name)); 411 } 412 413 int 414 send_tncmd(func, cmd, name) 415 void (*func)(); 416 char *cmd, *name; 417 { 418 char **cpp; 419 extern char *telopts[]; 420 421 if (isprefix(name, "help") || isprefix(name, "?")) { 422 register int col, len; 423 424 printf("Usage: send %s <option>\n", cmd); 425 printf("Valid options are:\n\t"); 426 427 col = 8; 428 for (cpp = telopts; *cpp; cpp++) { 429 len = strlen(*cpp) + 1; 430 if (col + len > 65) { 431 printf("\n\t"); 432 col = 8; 433 } 434 printf(" %s", *cpp); 435 col += len; 436 } 437 printf("\n"); 438 return 0; 439 } 440 cpp = (char **)genget(name, telopts, sizeof(char *)); 441 if (Ambiguous(cpp)) { 442 fprintf(stderr,"'%s': ambiguous argument ('send %s ?' for help).\n", 443 name, cmd); 444 return 0; 445 } 446 if (cpp == 0) { 447 fprintf(stderr, "'%s': unknown argument ('send %s ?' for help).\n", 448 name, cmd); 449 return 0; 450 } 451 if (!connected) { 452 printf("?Need to be connected first.\n"); 453 return 0; 454 } 455 (*func)(cpp - telopts, 1); 456 return 1; 457 } 458 459 static int 460 send_help() 461 { 462 struct sendlist *s; /* pointer to current command */ 463 for (s = Sendlist; s->name; s++) { 464 if (s->help) 465 printf("%-15s %s\n", s->name, s->help); 466 } 467 return(0); 468 } 469 470 /* 471 * The following are the routines and data structures referred 472 * to by the arguments to the "toggle" command. 473 */ 474 475 static int 476 lclchars() 477 { 478 donelclchars = 1; 479 return 1; 480 } 481 482 static int 483 togdebug() 484 { 485 #ifndef NOT43 486 if (net > 0 && 487 (SetSockOpt(net, SOL_SOCKET, SO_DEBUG, debug)) < 0) { 488 perror("setsockopt (SO_DEBUG)"); 489 } 490 #else /* NOT43 */ 491 if (debug) { 492 if (net > 0 && SetSockOpt(net, SOL_SOCKET, SO_DEBUG, 0, 0) < 0) 493 perror("setsockopt (SO_DEBUG)"); 494 } else 495 printf("Cannot turn off socket debugging\n"); 496 #endif /* NOT43 */ 497 return 1; 498 } 499 500 501 static int 502 togcrlf() 503 { 504 if (crlf) { 505 printf("Will send carriage returns as telnet <CR><LF>.\n"); 506 } else { 507 printf("Will send carriage returns as telnet <CR><NUL>.\n"); 508 } 509 return 1; 510 } 511 512 int binmode; 513 514 static int 515 togbinary(val) 516 int val; 517 { 518 donebinarytoggle = 1; 519 520 if (val >= 0) { 521 binmode = val; 522 } else { 523 if (my_want_state_is_will(TELOPT_BINARY) && 524 my_want_state_is_do(TELOPT_BINARY)) { 525 binmode = 1; 526 } else if (my_want_state_is_wont(TELOPT_BINARY) && 527 my_want_state_is_dont(TELOPT_BINARY)) { 528 binmode = 0; 529 } 530 val = binmode ? 0 : 1; 531 } 532 533 if (val == 1) { 534 if (my_want_state_is_will(TELOPT_BINARY) && 535 my_want_state_is_do(TELOPT_BINARY)) { 536 printf("Already operating in binary mode with remote host.\n"); 537 } else { 538 printf("Negotiating binary mode with remote host.\n"); 539 tel_enter_binary(3); 540 } 541 } else { 542 if (my_want_state_is_wont(TELOPT_BINARY) && 543 my_want_state_is_dont(TELOPT_BINARY)) { 544 printf("Already in network ascii mode with remote host.\n"); 545 } else { 546 printf("Negotiating network ascii mode with remote host.\n"); 547 tel_leave_binary(3); 548 } 549 } 550 return 1; 551 } 552 553 static int 554 togrbinary(val) 555 int val; 556 { 557 donebinarytoggle = 1; 558 559 if (val == -1) 560 val = my_want_state_is_do(TELOPT_BINARY) ? 0 : 1; 561 562 if (val == 1) { 563 if (my_want_state_is_do(TELOPT_BINARY)) { 564 printf("Already receiving in binary mode.\n"); 565 } else { 566 printf("Negotiating binary mode on input.\n"); 567 tel_enter_binary(1); 568 } 569 } else { 570 if (my_want_state_is_dont(TELOPT_BINARY)) { 571 printf("Already receiving in network ascii mode.\n"); 572 } else { 573 printf("Negotiating network ascii mode on input.\n"); 574 tel_leave_binary(1); 575 } 576 } 577 return 1; 578 } 579 580 static int 581 togxbinary(val) 582 int val; 583 { 584 donebinarytoggle = 1; 585 586 if (val == -1) 587 val = my_want_state_is_will(TELOPT_BINARY) ? 0 : 1; 588 589 if (val == 1) { 590 if (my_want_state_is_will(TELOPT_BINARY)) { 591 printf("Already transmitting in binary mode.\n"); 592 } else { 593 printf("Negotiating binary mode on output.\n"); 594 tel_enter_binary(2); 595 } 596 } else { 597 if (my_want_state_is_wont(TELOPT_BINARY)) { 598 printf("Already transmitting in network ascii mode.\n"); 599 } else { 600 printf("Negotiating network ascii mode on output.\n"); 601 tel_leave_binary(2); 602 } 603 } 604 return 1; 605 } 606 607 608 static int togglehelp P((void)); 609 #if defined(AUTHENTICATE) 610 extern int auth_togdebug P((int)); 611 #endif 612 #if defined(ENCRYPT) 613 extern int EncryptAutoEnc P((int)); 614 extern int EncryptAutoDec P((int)); 615 extern int EncryptDebug P((int)); 616 extern int EncryptVerbose P((int)); 617 #endif 618 619 struct togglelist { 620 char *name; /* name of toggle */ 621 char *help; /* help message */ 622 int (*handler)(); /* routine to do actual setting */ 623 int *variable; 624 char *actionexplanation; 625 }; 626 627 static struct togglelist Togglelist[] = { 628 { "autoflush", 629 "flushing of output when sending interrupt characters", 630 0, 631 &autoflush, 632 "flush output when sending interrupt characters" }, 633 { "autosynch", 634 "automatic sending of interrupt characters in urgent mode", 635 0, 636 &autosynch, 637 "send interrupt characters in urgent mode" }, 638 #if defined(AUTHENTICATE) 639 { "autologin", 640 "automatic sending of login and/or authentication info", 641 0, 642 &autologin, 643 "send login name and/or authentication information" }, 644 { "authdebug", 645 "Toggle authentication debugging", 646 auth_togdebug, 647 0, 648 "print authentication debugging information" }, 649 #endif 650 #if defined(ENCRYPT) 651 { "autoencrypt", 652 "automatic encryption of data stream", 653 EncryptAutoEnc, 654 0, 655 "automatically encrypt output" }, 656 { "autodecrypt", 657 "automatic decryption of data stream", 658 EncryptAutoDec, 659 0, 660 "automatically decrypt input" }, 661 { "verbose_encrypt", 662 "Toggle verbose encryption output", 663 EncryptVerbose, 664 0, 665 "print verbose encryption output" }, 666 { "encdebug", 667 "Toggle encryption debugging", 668 EncryptDebug, 669 0, 670 "print encryption debugging information" }, 671 #endif 672 { "skiprc", 673 "don't read ~/.telnetrc file", 674 0, 675 &skiprc, 676 "read ~/.telnetrc file" }, 677 { "binary", 678 "sending and receiving of binary data", 679 togbinary, 680 0, 681 0 }, 682 { "inbinary", 683 "receiving of binary data", 684 togrbinary, 685 0, 686 0 }, 687 { "outbinary", 688 "sending of binary data", 689 togxbinary, 690 0, 691 0 }, 692 { "crlf", 693 "sending carriage returns as telnet <CR><LF>", 694 togcrlf, 695 &crlf, 696 0 }, 697 { "crmod", 698 "mapping of received carriage returns", 699 0, 700 &crmod, 701 "map carriage return on output" }, 702 { "localchars", 703 "local recognition of certain control characters", 704 lclchars, 705 &localchars, 706 "recognize certain control characters" }, 707 { " ", "", 0 }, /* empty line */ 708 #if defined(unix) && defined(TN3270) 709 { "apitrace", 710 "(debugging) toggle tracing of API transactions", 711 0, 712 &apitrace, 713 "trace API transactions" }, 714 { "cursesdata", 715 "(debugging) toggle printing of hexadecimal curses data", 716 0, 717 &cursesdata, 718 "print hexadecimal representation of curses data" }, 719 #endif /* defined(unix) && defined(TN3270) */ 720 { "debug", 721 "debugging", 722 togdebug, 723 &debug, 724 "turn on socket level debugging" }, 725 { "netdata", 726 "printing of hexadecimal network data (debugging)", 727 0, 728 &netdata, 729 "print hexadecimal representation of network traffic" }, 730 { "prettydump", 731 "output of \"netdata\" to user readable format (debugging)", 732 0, 733 &prettydump, 734 "print user readable output for \"netdata\"" }, 735 { "options", 736 "viewing of options processing (debugging)", 737 0, 738 &showoptions, 739 "show option processing" }, 740 #if defined(unix) 741 { "termdata", 742 "(debugging) toggle printing of hexadecimal terminal data", 743 0, 744 &termdata, 745 "print hexadecimal representation of terminal traffic" }, 746 #endif /* defined(unix) */ 747 { "?", 748 0, 749 togglehelp }, 750 { "help", 751 0, 752 togglehelp }, 753 { 0 } 754 }; 755 756 static int 757 togglehelp() 758 { 759 struct togglelist *c; 760 761 for (c = Togglelist; c->name; c++) { 762 if (c->help) { 763 if (*c->help) 764 printf("%-15s toggle %s\n", c->name, c->help); 765 else 766 printf("\n"); 767 } 768 } 769 printf("\n"); 770 printf("%-15s %s\n", "?", "display help information"); 771 return 0; 772 } 773 774 static void 775 settogglehelp(set) 776 int set; 777 { 778 struct togglelist *c; 779 780 for (c = Togglelist; c->name; c++) { 781 if (c->help) { 782 if (*c->help) 783 printf("%-15s %s %s\n", c->name, set ? "enable" : "disable", 784 c->help); 785 else 786 printf("\n"); 787 } 788 } 789 } 790 791 #define GETTOGGLE(name) (struct togglelist *) \ 792 genget(name, (char **) Togglelist, sizeof(struct togglelist)) 793 794 static int 795 toggle(argc, argv) 796 int argc; 797 char *argv[]; 798 { 799 int retval = 1; 800 char *name; 801 struct togglelist *c; 802 803 if (argc < 2) { 804 fprintf(stderr, 805 "Need an argument to 'toggle' command. 'toggle ?' for help.\n"); 806 return 0; 807 } 808 argc--; 809 argv++; 810 while (argc--) { 811 name = *argv++; 812 c = GETTOGGLE(name); 813 if (Ambiguous(c)) { 814 fprintf(stderr, "'%s': ambiguous argument ('toggle ?' for help).\n", 815 name); 816 return 0; 817 } else if (c == 0) { 818 fprintf(stderr, "'%s': unknown argument ('toggle ?' for help).\n", 819 name); 820 return 0; 821 } else { 822 if (c->variable) { 823 *c->variable = !*c->variable; /* invert it */ 824 if (c->actionexplanation) { 825 printf("%s %s.\n", *c->variable? "Will" : "Won't", 826 c->actionexplanation); 827 } 828 } 829 if (c->handler) { 830 retval &= (*c->handler)(-1); 831 } 832 } 833 } 834 return retval; 835 } 836 837 /* 838 * The following perform the "set" command. 839 */ 840 841 #ifdef USE_TERMIO 842 struct termio new_tc = { 0 }; 843 #endif 844 845 struct setlist { 846 char *name; /* name */ 847 char *help; /* help information */ 848 void (*handler)(); 849 cc_t *charp; /* where it is located at */ 850 }; 851 852 static struct setlist Setlist[] = { 853 #ifdef KLUDGELINEMODE 854 { "echo", "character to toggle local echoing on/off", 0, &echoc }, 855 #endif 856 { "escape", "character to escape back to telnet command mode", 0, &escape }, 857 { "rlogin", "rlogin escape character", 0, &rlogin }, 858 { "tracefile", "file to write trace information to", SetNetTrace, (cc_t *)NetTraceFile}, 859 { " ", "" }, 860 { " ", "The following need 'localchars' to be toggled true", 0, 0 }, 861 { "flushoutput", "character to cause an Abort Output", 0, termFlushCharp }, 862 { "interrupt", "character to cause an Interrupt Process", 0, termIntCharp }, 863 { "quit", "character to cause an Abort process", 0, termQuitCharp }, 864 { "eof", "character to cause an EOF ", 0, termEofCharp }, 865 { " ", "" }, 866 { " ", "The following are for local editing in linemode", 0, 0 }, 867 { "erase", "character to use to erase a character", 0, termEraseCharp }, 868 { "kill", "character to use to erase a line", 0, termKillCharp }, 869 { "lnext", "character to use for literal next", 0, termLiteralNextCharp }, 870 { "susp", "character to cause a Suspend Process", 0, termSuspCharp }, 871 { "reprint", "character to use for line reprint", 0, termRprntCharp }, 872 { "worderase", "character to use to erase a word", 0, termWerasCharp }, 873 { "start", "character to use for XON", 0, termStartCharp }, 874 { "stop", "character to use for XOFF", 0, termStopCharp }, 875 { "forw1", "alternate end of line character", 0, termForw1Charp }, 876 { "forw2", "alternate end of line character", 0, termForw2Charp }, 877 { "ayt", "alternate AYT character", 0, termAytCharp }, 878 { 0 } 879 }; 880 881 #if defined(CRAY) && !defined(__STDC__) 882 /* Work around compiler bug in pcc 4.1.5 */ 883 void 884 _setlist_init() 885 { 886 #ifndef KLUDGELINEMODE 887 #define N 5 888 #else 889 #define N 6 890 #endif 891 Setlist[N+0].charp = &termFlushChar; 892 Setlist[N+1].charp = &termIntChar; 893 Setlist[N+2].charp = &termQuitChar; 894 Setlist[N+3].charp = &termEofChar; 895 Setlist[N+6].charp = &termEraseChar; 896 Setlist[N+7].charp = &termKillChar; 897 Setlist[N+8].charp = &termLiteralNextChar; 898 Setlist[N+9].charp = &termSuspChar; 899 Setlist[N+10].charp = &termRprntChar; 900 Setlist[N+11].charp = &termWerasChar; 901 Setlist[N+12].charp = &termStartChar; 902 Setlist[N+13].charp = &termStopChar; 903 Setlist[N+14].charp = &termForw1Char; 904 Setlist[N+15].charp = &termForw2Char; 905 Setlist[N+16].charp = &termAytChar; 906 #undef N 907 } 908 #endif /* defined(CRAY) && !defined(__STDC__) */ 909 910 static struct setlist * 911 getset(name) 912 char *name; 913 { 914 return (struct setlist *) 915 genget(name, (char **) Setlist, sizeof(struct setlist)); 916 } 917 918 void 919 set_escape_char(s) 920 char *s; 921 { 922 if (rlogin != _POSIX_VDISABLE) { 923 rlogin = (s && *s) ? special(s) : _POSIX_VDISABLE; 924 printf("Telnet rlogin escape character is '%s'.\n", 925 control(rlogin)); 926 } else { 927 escape = (s && *s) ? special(s) : _POSIX_VDISABLE; 928 printf("Telnet escape character is '%s'.\n", control(escape)); 929 } 930 } 931 932 static int 933 setcmd(argc, argv) 934 int argc; 935 char *argv[]; 936 { 937 int value; 938 struct setlist *ct; 939 struct togglelist *c; 940 941 if (argc < 2 || argc > 3) { 942 printf("Format is 'set Name Value'\n'set ?' for help.\n"); 943 return 0; 944 } 945 if ((argc == 2) && (isprefix(argv[1], "?") || isprefix(argv[1], "help"))) { 946 for (ct = Setlist; ct->name; ct++) 947 printf("%-15s %s\n", ct->name, ct->help); 948 printf("\n"); 949 settogglehelp(1); 950 printf("%-15s %s\n", "?", "display help information"); 951 return 0; 952 } 953 954 ct = getset(argv[1]); 955 if (ct == 0) { 956 c = GETTOGGLE(argv[1]); 957 if (c == 0) { 958 fprintf(stderr, "'%s': unknown argument ('set ?' for help).\n", 959 argv[1]); 960 return 0; 961 } else if (Ambiguous(c)) { 962 fprintf(stderr, "'%s': ambiguous argument ('set ?' for help).\n", 963 argv[1]); 964 return 0; 965 } 966 if (c->variable) { 967 if ((argc == 2) || (strcmp("on", argv[2]) == 0)) 968 *c->variable = 1; 969 else if (strcmp("off", argv[2]) == 0) 970 *c->variable = 0; 971 else { 972 printf("Format is 'set togglename [on|off]'\n'set ?' for help.\n"); 973 return 0; 974 } 975 if (c->actionexplanation) { 976 printf("%s %s.\n", *c->variable? "Will" : "Won't", 977 c->actionexplanation); 978 } 979 } 980 if (c->handler) 981 (*c->handler)(1); 982 } else if (argc != 3) { 983 printf("Format is 'set Name Value'\n'set ?' for help.\n"); 984 return 0; 985 } else if (Ambiguous(ct)) { 986 fprintf(stderr, "'%s': ambiguous argument ('set ?' for help).\n", 987 argv[1]); 988 return 0; 989 } else if (ct->handler) { 990 (*ct->handler)(argv[2]); 991 printf("%s set to \"%s\".\n", ct->name, (char *)ct->charp); 992 } else { 993 if (strcmp("off", argv[2])) { 994 value = special(argv[2]); 995 } else { 996 value = _POSIX_VDISABLE; 997 } 998 *(ct->charp) = (cc_t)value; 999 printf("%s character is '%s'.\n", ct->name, control(*(ct->charp))); 1000 } 1001 slc_check(); 1002 return 1; 1003 } 1004 1005 static int 1006 unsetcmd(argc, argv) 1007 int argc; 1008 char *argv[]; 1009 { 1010 struct setlist *ct; 1011 struct togglelist *c; 1012 register char *name; 1013 1014 if (argc < 2) { 1015 fprintf(stderr, 1016 "Need an argument to 'unset' command. 'unset ?' for help.\n"); 1017 return 0; 1018 } 1019 if (isprefix(argv[1], "?") || isprefix(argv[1], "help")) { 1020 for (ct = Setlist; ct->name; ct++) 1021 printf("%-15s %s\n", ct->name, ct->help); 1022 printf("\n"); 1023 settogglehelp(0); 1024 printf("%-15s %s\n", "?", "display help information"); 1025 return 0; 1026 } 1027 1028 argc--; 1029 argv++; 1030 while (argc--) { 1031 name = *argv++; 1032 ct = getset(name); 1033 if (ct == 0) { 1034 c = GETTOGGLE(name); 1035 if (c == 0) { 1036 fprintf(stderr, "'%s': unknown argument ('unset ?' for help).\n", 1037 name); 1038 return 0; 1039 } else if (Ambiguous(c)) { 1040 fprintf(stderr, "'%s': ambiguous argument ('unset ?' for help).\n", 1041 name); 1042 return 0; 1043 } 1044 if (c->variable) { 1045 *c->variable = 0; 1046 if (c->actionexplanation) { 1047 printf("%s %s.\n", *c->variable? "Will" : "Won't", 1048 c->actionexplanation); 1049 } 1050 } 1051 if (c->handler) 1052 (*c->handler)(0); 1053 } else if (Ambiguous(ct)) { 1054 fprintf(stderr, "'%s': ambiguous argument ('unset ?' for help).\n", 1055 name); 1056 return 0; 1057 } else if (ct->handler) { 1058 (*ct->handler)(0); 1059 printf("%s reset to \"%s\".\n", ct->name, (char *)ct->charp); 1060 } else { 1061 *(ct->charp) = _POSIX_VDISABLE; 1062 printf("%s character is '%s'.\n", ct->name, control(*(ct->charp))); 1063 } 1064 } 1065 return 1; 1066 } 1067 1068 /* 1069 * The following are the data structures and routines for the 1070 * 'mode' command. 1071 */ 1072 #ifdef KLUDGELINEMODE 1073 extern int kludgelinemode; 1074 1075 static int 1076 dokludgemode() 1077 { 1078 kludgelinemode = 1; 1079 send_wont(TELOPT_LINEMODE, 1); 1080 send_dont(TELOPT_SGA, 1); 1081 send_dont(TELOPT_ECHO, 1); 1082 } 1083 #endif 1084 1085 static int 1086 dolinemode() 1087 { 1088 #ifdef KLUDGELINEMODE 1089 if (kludgelinemode) 1090 send_dont(TELOPT_SGA, 1); 1091 #endif 1092 send_will(TELOPT_LINEMODE, 1); 1093 send_dont(TELOPT_ECHO, 1); 1094 return 1; 1095 } 1096 1097 static int 1098 docharmode() 1099 { 1100 #ifdef KLUDGELINEMODE 1101 if (kludgelinemode) 1102 send_do(TELOPT_SGA, 1); 1103 else 1104 #endif 1105 send_wont(TELOPT_LINEMODE, 1); 1106 send_do(TELOPT_ECHO, 1); 1107 return 1; 1108 } 1109 1110 static int 1111 dolmmode(bit, on) 1112 int bit, on; 1113 { 1114 unsigned char c; 1115 extern int linemode; 1116 1117 if (my_want_state_is_wont(TELOPT_LINEMODE)) { 1118 printf("?Need to have LINEMODE option enabled first.\n"); 1119 printf("'mode ?' for help.\n"); 1120 return 0; 1121 } 1122 1123 if (on) 1124 c = (linemode | bit); 1125 else 1126 c = (linemode & ~bit); 1127 lm_mode(&c, 1, 1); 1128 return 1; 1129 } 1130 1131 int 1132 setmode(bit) 1133 { 1134 return dolmmode(bit, 1); 1135 } 1136 1137 int 1138 clearmode(bit) 1139 { 1140 return dolmmode(bit, 0); 1141 } 1142 1143 struct modelist { 1144 char *name; /* command name */ 1145 char *help; /* help string */ 1146 int (*handler)(); /* routine which executes command */ 1147 int needconnect; /* Do we need to be connected to execute? */ 1148 int arg1; 1149 }; 1150 1151 extern int modehelp(); 1152 1153 static struct modelist ModeList[] = { 1154 { "character", "Disable LINEMODE option", docharmode, 1 }, 1155 #ifdef KLUDGELINEMODE 1156 { "", "(or disable obsolete line-by-line mode)", 0 }, 1157 #endif 1158 { "line", "Enable LINEMODE option", dolinemode, 1 }, 1159 #ifdef KLUDGELINEMODE 1160 { "", "(or enable obsolete line-by-line mode)", 0 }, 1161 #endif 1162 { "", "", 0 }, 1163 { "", "These require the LINEMODE option to be enabled", 0 }, 1164 { "isig", "Enable signal trapping", setmode, 1, MODE_TRAPSIG }, 1165 { "+isig", 0, setmode, 1, MODE_TRAPSIG }, 1166 { "-isig", "Disable signal trapping", clearmode, 1, MODE_TRAPSIG }, 1167 { "edit", "Enable character editing", setmode, 1, MODE_EDIT }, 1168 { "+edit", 0, setmode, 1, MODE_EDIT }, 1169 { "-edit", "Disable character editing", clearmode, 1, MODE_EDIT }, 1170 { "softtabs", "Enable tab expansion", setmode, 1, MODE_SOFT_TAB }, 1171 { "+softtabs", 0, setmode, 1, MODE_SOFT_TAB }, 1172 { "-softtabs", "Disable character editing", clearmode, 1, MODE_SOFT_TAB }, 1173 { "litecho", "Enable literal character echo", setmode, 1, MODE_LIT_ECHO }, 1174 { "+litecho", 0, setmode, 1, MODE_LIT_ECHO }, 1175 { "-litecho", "Disable literal character echo", clearmode, 1, MODE_LIT_ECHO }, 1176 { "help", 0, modehelp, 0 }, 1177 #ifdef KLUDGELINEMODE 1178 { "kludgeline", 0, dokludgemode, 1 }, 1179 #endif 1180 { "", "", 0 }, 1181 { "?", "Print help information", modehelp, 0 }, 1182 { 0 }, 1183 }; 1184 1185 1186 int 1187 modehelp() 1188 { 1189 struct modelist *mt; 1190 1191 printf("format is: 'mode Mode', where 'Mode' is one of:\n\n"); 1192 for (mt = ModeList; mt->name; mt++) { 1193 if (mt->help) { 1194 if (*mt->help) 1195 printf("%-15s %s\n", mt->name, mt->help); 1196 else 1197 printf("\n"); 1198 } 1199 } 1200 return 0; 1201 } 1202 1203 #define GETMODECMD(name) (struct modelist *) \ 1204 genget(name, (char **) ModeList, sizeof(struct modelist)) 1205 1206 static int 1207 modecmd(argc, argv) 1208 int argc; 1209 char *argv[]; 1210 { 1211 struct modelist *mt; 1212 1213 if (argc != 2) { 1214 printf("'mode' command requires an argument\n"); 1215 printf("'mode ?' for help.\n"); 1216 } else if ((mt = GETMODECMD(argv[1])) == 0) { 1217 fprintf(stderr, "Unknown mode '%s' ('mode ?' for help).\n", argv[1]); 1218 } else if (Ambiguous(mt)) { 1219 fprintf(stderr, "Ambiguous mode '%s' ('mode ?' for help).\n", argv[1]); 1220 } else if (mt->needconnect && !connected) { 1221 printf("?Need to be connected first.\n"); 1222 printf("'mode ?' for help.\n"); 1223 } else if (mt->handler) { 1224 return (*mt->handler)(mt->arg1); 1225 } 1226 return 0; 1227 } 1228 1229 /* 1230 * The following data structures and routines implement the 1231 * "display" command. 1232 */ 1233 1234 static int 1235 display(argc, argv) 1236 int argc; 1237 char *argv[]; 1238 { 1239 struct togglelist *tl; 1240 struct setlist *sl; 1241 1242 #define dotog(tl) if (tl->variable && tl->actionexplanation) { \ 1243 if (*tl->variable) { \ 1244 printf("will"); \ 1245 } else { \ 1246 printf("won't"); \ 1247 } \ 1248 printf(" %s.\n", tl->actionexplanation); \ 1249 } 1250 1251 #define doset(sl) if (sl->name && *sl->name != ' ') { \ 1252 if (sl->handler == 0) \ 1253 printf("%-15s [%s]\n", sl->name, control(*sl->charp)); \ 1254 else \ 1255 printf("%-15s \"%s\"\n", sl->name, (char *)sl->charp); \ 1256 } 1257 1258 if (argc == 1) { 1259 for (tl = Togglelist; tl->name; tl++) { 1260 dotog(tl); 1261 } 1262 printf("\n"); 1263 for (sl = Setlist; sl->name; sl++) { 1264 doset(sl); 1265 } 1266 } else { 1267 int i; 1268 1269 for (i = 1; i < argc; i++) { 1270 sl = getset(argv[i]); 1271 tl = GETTOGGLE(argv[i]); 1272 if (Ambiguous(sl) || Ambiguous(tl)) { 1273 printf("?Ambiguous argument '%s'.\n", argv[i]); 1274 return 0; 1275 } else if (!sl && !tl) { 1276 printf("?Unknown argument '%s'.\n", argv[i]); 1277 return 0; 1278 } else { 1279 if (tl) { 1280 dotog(tl); 1281 } 1282 if (sl) { 1283 doset(sl); 1284 } 1285 } 1286 } 1287 } 1288 /*@*/optionstatus(); 1289 #if defined(ENCRYPT) 1290 EncryptStatus(); 1291 #endif 1292 return 1; 1293 #undef doset 1294 #undef dotog 1295 } 1296 1297 /* 1298 * The following are the data structures, and many of the routines, 1299 * relating to command processing. 1300 */ 1301 1302 /* 1303 * Set the escape character. 1304 */ 1305 static int 1306 setescape(argc, argv) 1307 int argc; 1308 char *argv[]; 1309 { 1310 register char *arg; 1311 char buf[50]; 1312 1313 printf( 1314 "Deprecated usage - please use 'set escape%s%s' in the future.\n", 1315 (argc > 2)? " ":"", (argc > 2)? argv[1]: ""); 1316 if (argc > 2) 1317 arg = argv[1]; 1318 else { 1319 printf("new escape character: "); 1320 (void) fgets(buf, sizeof(buf), stdin); 1321 arg = buf; 1322 } 1323 if (arg[0] != '\0') 1324 escape = arg[0]; 1325 if (!In3270) { 1326 printf("Escape character is '%s'.\n", control(escape)); 1327 } 1328 (void) fflush(stdout); 1329 return 1; 1330 } 1331 1332 /*VARARGS*/ 1333 static int 1334 togcrmod() 1335 { 1336 crmod = !crmod; 1337 printf("Deprecated usage - please use 'toggle crmod' in the future.\n"); 1338 printf("%s map carriage return on output.\n", crmod ? "Will" : "Won't"); 1339 (void) fflush(stdout); 1340 return 1; 1341 } 1342 1343 /*VARARGS*/ 1344 int 1345 suspend() 1346 { 1347 #ifdef SIGTSTP 1348 setcommandmode(); 1349 { 1350 long oldrows, oldcols, newrows, newcols, err; 1351 1352 err = TerminalWindowSize(&oldrows, &oldcols); 1353 (void) kill(0, SIGTSTP); 1354 err += TerminalWindowSize(&newrows, &newcols); 1355 if (connected && !err && 1356 ((oldrows != newrows) || (oldcols != newcols))) { 1357 sendnaws(); 1358 } 1359 } 1360 /* reget parameters in case they were changed */ 1361 TerminalSaveState(); 1362 setconnmode(0); 1363 #else 1364 printf("Suspend is not supported. Try the '!' command instead\n"); 1365 #endif 1366 return 1; 1367 } 1368 1369 #if !defined(TN3270) 1370 /*ARGSUSED*/ 1371 int 1372 shell(argc, argv) 1373 int argc; 1374 char *argv[]; 1375 { 1376 setcommandmode(); 1377 switch(vfork()) { 1378 case -1: 1379 perror("Fork failed\n"); 1380 break; 1381 1382 case 0: 1383 { 1384 /* 1385 * Fire up the shell in the child. 1386 */ 1387 register char *shellp, *shellname; 1388 extern char *rindex(); 1389 1390 shellp = getenv("SHELL"); 1391 if (shellp == NULL) 1392 shellp = "/bin/sh"; 1393 if ((shellname = rindex(shellp, '/')) == 0) 1394 shellname = shellp; 1395 else 1396 shellname++; 1397 if (argc > 1) 1398 execl(shellp, shellname, "-c", &saveline[1], 0); 1399 else 1400 execl(shellp, shellname, 0); 1401 perror("Execl"); 1402 _exit(1); 1403 } 1404 default: 1405 (void)wait((int *)0); /* Wait for the shell to complete */ 1406 } 1407 return 1; 1408 } 1409 #endif /* !defined(TN3270) */ 1410 1411 /*VARARGS*/ 1412 static 1413 bye(argc, argv) 1414 int argc; /* Number of arguments */ 1415 char *argv[]; /* arguments */ 1416 { 1417 extern int resettermname; 1418 1419 if (connected) { 1420 (void) shutdown(net, 2); 1421 printf("Connection closed.\n"); 1422 (void) NetClose(net); 1423 connected = 0; 1424 resettermname = 1; 1425 #if defined(AUTHENTICATE) || defined(ENCRYPT) 1426 auth_encrypt_connect(connected); 1427 #endif 1428 /* reset options */ 1429 tninit(); 1430 #if defined(TN3270) 1431 SetIn3270(); /* Get out of 3270 mode */ 1432 #endif /* defined(TN3270) */ 1433 } 1434 if ((argc != 2) || (strcmp(argv[1], "fromquit") != 0)) { 1435 longjmp(toplevel, 1); 1436 /* NOTREACHED */ 1437 } 1438 return 1; /* Keep lint, etc., happy */ 1439 } 1440 1441 /*VARARGS*/ 1442 quit() 1443 { 1444 (void) call(bye, "bye", "fromquit", 0); 1445 Exit(0); 1446 /*NOTREACHED*/ 1447 } 1448 1449 /*VARARGS*/ 1450 int 1451 logout() 1452 { 1453 send_do(TELOPT_LOGOUT, 1); 1454 (void) netflush(); 1455 return 1; 1456 } 1457 1458 1459 /* 1460 * The SLC command. 1461 */ 1462 1463 struct slclist { 1464 char *name; 1465 char *help; 1466 void (*handler)(); 1467 int arg; 1468 }; 1469 1470 static void slc_help(); 1471 1472 struct slclist SlcList[] = { 1473 { "export", "Use local special character definitions", 1474 slc_mode_export, 0 }, 1475 { "import", "Use remote special character definitions", 1476 slc_mode_import, 1 }, 1477 { "check", "Verify remote special character definitions", 1478 slc_mode_import, 0 }, 1479 { "help", 0, slc_help, 0 }, 1480 { "?", "Print help information", slc_help, 0 }, 1481 { 0 }, 1482 }; 1483 1484 static void 1485 slc_help() 1486 { 1487 struct slclist *c; 1488 1489 for (c = SlcList; c->name; c++) { 1490 if (c->help) { 1491 if (*c->help) 1492 printf("%-15s %s\n", c->name, c->help); 1493 else 1494 printf("\n"); 1495 } 1496 } 1497 } 1498 1499 static struct slclist * 1500 getslc(name) 1501 char *name; 1502 { 1503 return (struct slclist *) 1504 genget(name, (char **) SlcList, sizeof(struct slclist)); 1505 } 1506 1507 static 1508 slccmd(argc, argv) 1509 int argc; 1510 char *argv[]; 1511 { 1512 struct slclist *c; 1513 1514 if (argc != 2) { 1515 fprintf(stderr, 1516 "Need an argument to 'slc' command. 'slc ?' for help.\n"); 1517 return 0; 1518 } 1519 c = getslc(argv[1]); 1520 if (c == 0) { 1521 fprintf(stderr, "'%s': unknown argument ('slc ?' for help).\n", 1522 argv[1]); 1523 return 0; 1524 } 1525 if (Ambiguous(c)) { 1526 fprintf(stderr, "'%s': ambiguous argument ('slc ?' for help).\n", 1527 argv[1]); 1528 return 0; 1529 } 1530 (*c->handler)(c->arg); 1531 slcstate(); 1532 return 1; 1533 } 1534 1535 /* 1536 * The ENVIRON command. 1537 */ 1538 1539 struct envlist { 1540 char *name; 1541 char *help; 1542 void (*handler)(); 1543 int narg; 1544 }; 1545 1546 extern struct env_lst * 1547 env_define P((unsigned char *, unsigned char *)); 1548 extern void 1549 env_undefine P((unsigned char *)), 1550 env_export P((unsigned char *)), 1551 env_unexport P((unsigned char *)), 1552 env_send P((unsigned char *)), 1553 env_list P((void)); 1554 static void 1555 env_help P((void)); 1556 1557 struct envlist EnvList[] = { 1558 { "define", "Define an environment variable", 1559 (void (*)())env_define, 2 }, 1560 { "undefine", "Undefine an environment variable", 1561 env_undefine, 1 }, 1562 { "export", "Mark an environment variable for automatic export", 1563 env_export, 1 }, 1564 { "unexport", "Don't mark an environment variable for automatic export", 1565 env_unexport, 1 }, 1566 { "send", "Send an environment variable", env_send, 1 }, 1567 { "list", "List the current environment variables", 1568 env_list, 0 }, 1569 { "help", 0, env_help, 0 }, 1570 { "?", "Print help information", env_help, 0 }, 1571 { 0 }, 1572 }; 1573 1574 static void 1575 env_help() 1576 { 1577 struct envlist *c; 1578 1579 for (c = EnvList; c->name; c++) { 1580 if (c->help) { 1581 if (*c->help) 1582 printf("%-15s %s\n", c->name, c->help); 1583 else 1584 printf("\n"); 1585 } 1586 } 1587 } 1588 1589 static struct envlist * 1590 getenvcmd(name) 1591 char *name; 1592 { 1593 return (struct envlist *) 1594 genget(name, (char **) EnvList, sizeof(struct envlist)); 1595 } 1596 1597 env_cmd(argc, argv) 1598 int argc; 1599 char *argv[]; 1600 { 1601 struct envlist *c; 1602 1603 if (argc < 2) { 1604 fprintf(stderr, 1605 "Need an argument to 'environ' command. 'environ ?' for help.\n"); 1606 return 0; 1607 } 1608 c = getenvcmd(argv[1]); 1609 if (c == 0) { 1610 fprintf(stderr, "'%s': unknown argument ('environ ?' for help).\n", 1611 argv[1]); 1612 return 0; 1613 } 1614 if (Ambiguous(c)) { 1615 fprintf(stderr, "'%s': ambiguous argument ('environ ?' for help).\n", 1616 argv[1]); 1617 return 0; 1618 } 1619 if (c->narg + 2 != argc) { 1620 fprintf(stderr, 1621 "Need %s%d argument%s to 'environ %s' command. 'environ ?' for help.\n", 1622 c->narg < argc + 2 ? "only " : "", 1623 c->narg, c->narg == 1 ? "" : "s", c->name); 1624 return 0; 1625 } 1626 (*c->handler)(argv[2], argv[3]); 1627 return 1; 1628 } 1629 1630 struct env_lst { 1631 struct env_lst *next; /* pointer to next structure */ 1632 struct env_lst *prev; /* pointer to next structure */ 1633 unsigned char *var; /* pointer to variable name */ 1634 unsigned char *value; /* pointer to varialbe value */ 1635 int export; /* 1 -> export with default list of variables */ 1636 }; 1637 1638 struct env_lst envlisthead; 1639 1640 struct env_lst * 1641 env_find(var) 1642 unsigned char *var; 1643 { 1644 register struct env_lst *ep; 1645 1646 for (ep = envlisthead.next; ep; ep = ep->next) { 1647 if (strcmp((char *)ep->var, (char *)var) == 0) 1648 return(ep); 1649 } 1650 return(NULL); 1651 } 1652 1653 void 1654 env_init() 1655 { 1656 extern char **environ; 1657 register char **epp, *cp; 1658 register struct env_lst *ep; 1659 extern char *index(); 1660 1661 for (epp = environ; *epp; epp++) { 1662 if (cp = index(*epp, '=')) { 1663 *cp = '\0'; 1664 ep = env_define((unsigned char *)*epp, 1665 (unsigned char *)cp+1); 1666 ep->export = 0; 1667 *cp = '='; 1668 } 1669 } 1670 /* 1671 * Special case for DISPLAY variable. If it is ":0.0" or 1672 * "unix:0.0", we have to get rid of "unix" and insert our 1673 * hostname. 1674 */ 1675 if ((ep = env_find("DISPLAY")) 1676 && ((*ep->value == ':') 1677 || (strncmp((char *)ep->value, "unix:", 5) == 0))) { 1678 char hbuf[256+1]; 1679 char *cp2 = index((char *)ep->value, ':'); 1680 1681 gethostname(hbuf, 256); 1682 hbuf[256] = '\0'; 1683 cp = (char *)malloc(strlen(hbuf) + strlen(cp2) + 1); 1684 sprintf((char *)cp, "%s%s", hbuf, cp2); 1685 free(ep->value); 1686 ep->value = (unsigned char *)cp; 1687 } 1688 /* 1689 * If USER is not defined, but LOGNAME is, then add 1690 * USER with the value from LOGNAME. By default, we 1691 * don't export the USER variable. 1692 */ 1693 if ((env_find("USER") == NULL) && (ep = env_find("LOGNAME"))) { 1694 env_define((unsigned char *)"USER", ep->value); 1695 env_unexport((unsigned char *)"USER"); 1696 } 1697 env_export((unsigned char *)"DISPLAY"); 1698 env_export((unsigned char *)"PRINTER"); 1699 } 1700 1701 struct env_lst * 1702 env_define(var, value) 1703 unsigned char *var, *value; 1704 { 1705 register struct env_lst *ep; 1706 1707 if (ep = env_find(var)) { 1708 if (ep->var) 1709 free(ep->var); 1710 if (ep->value) 1711 free(ep->value); 1712 } else { 1713 ep = (struct env_lst *)malloc(sizeof(struct env_lst)); 1714 ep->next = envlisthead.next; 1715 envlisthead.next = ep; 1716 ep->prev = &envlisthead; 1717 if (ep->next) 1718 ep->next->prev = ep; 1719 } 1720 ep->export = 1; 1721 ep->var = (unsigned char *)strdup((char *)var); 1722 ep->value = (unsigned char *)strdup((char *)value); 1723 return(ep); 1724 } 1725 1726 void 1727 env_undefine(var) 1728 unsigned char *var; 1729 { 1730 register struct env_lst *ep; 1731 1732 if (ep = env_find(var)) { 1733 ep->prev->next = ep->next; 1734 if (ep->next) 1735 ep->next->prev = ep->prev; 1736 if (ep->var) 1737 free(ep->var); 1738 if (ep->value) 1739 free(ep->value); 1740 free(ep); 1741 } 1742 } 1743 1744 void 1745 env_export(var) 1746 unsigned char *var; 1747 { 1748 register struct env_lst *ep; 1749 1750 if (ep = env_find(var)) 1751 ep->export = 1; 1752 } 1753 1754 void 1755 env_unexport(var) 1756 unsigned char *var; 1757 { 1758 register struct env_lst *ep; 1759 1760 if (ep = env_find(var)) 1761 ep->export = 0; 1762 } 1763 1764 void 1765 env_send(var) 1766 unsigned char *var; 1767 { 1768 register struct env_lst *ep; 1769 1770 if (my_state_is_wont(TELOPT_ENVIRON)) { 1771 fprintf(stderr, 1772 "Cannot send '%s': Telnet ENVIRON option not enabled\n", 1773 var); 1774 return; 1775 } 1776 ep = env_find(var); 1777 if (ep == 0) { 1778 fprintf(stderr, "Cannot send '%s': variable not defined\n", 1779 var); 1780 return; 1781 } 1782 env_opt_start_info(); 1783 env_opt_add(ep->var); 1784 env_opt_end(0); 1785 } 1786 1787 void 1788 env_list() 1789 { 1790 register struct env_lst *ep; 1791 1792 for (ep = envlisthead.next; ep; ep = ep->next) { 1793 printf("%c %-20s %s\n", ep->export ? '*' : ' ', 1794 ep->var, ep->value); 1795 } 1796 } 1797 1798 unsigned char * 1799 env_default(init) 1800 int init; 1801 { 1802 static struct env_lst *nep = NULL; 1803 1804 if (init) { 1805 nep = &envlisthead; 1806 return; 1807 } 1808 if (nep) { 1809 while (nep = nep->next) { 1810 if (nep->export) 1811 return(nep->var); 1812 } 1813 } 1814 return(NULL); 1815 } 1816 1817 unsigned char * 1818 env_getvalue(var) 1819 unsigned char *var; 1820 { 1821 register struct env_lst *ep; 1822 1823 if (ep = env_find(var)) 1824 return(ep->value); 1825 return(NULL); 1826 } 1827 1828 #if defined(AUTHENTICATE) 1829 /* 1830 * The AUTHENTICATE command. 1831 */ 1832 1833 struct authlist { 1834 char *name; 1835 char *help; 1836 int (*handler)(); 1837 int narg; 1838 }; 1839 1840 extern int 1841 auth_enable P((int)), 1842 auth_disable P((int)), 1843 auth_status P((void)), 1844 auth_help P((void)); 1845 1846 struct authlist AuthList[] = { 1847 { "status", "Display current status of authentication information", 1848 auth_status, 0 }, 1849 { "disable", "Disable an authentication type ('auth disable ?' for more)", 1850 auth_disable, 1 }, 1851 { "enable", "Enable an authentication type ('auth enable ?' for more)", 1852 auth_enable, 1 }, 1853 { "help", 0, auth_help, 0 }, 1854 { "?", "Print help information", auth_help, 0 }, 1855 { 0 }, 1856 }; 1857 1858 static int 1859 auth_help() 1860 { 1861 struct authlist *c; 1862 1863 for (c = AuthList; c->name; c++) { 1864 if (c->help) { 1865 if (*c->help) 1866 printf("%-15s %s\n", c->name, c->help); 1867 else 1868 printf("\n"); 1869 } 1870 } 1871 return 0; 1872 } 1873 1874 auth_cmd(argc, argv) 1875 int argc; 1876 char *argv[]; 1877 { 1878 struct authlist *c; 1879 1880 c = (struct authlist *) 1881 genget(argv[1], (char **) AuthList, sizeof(struct authlist)); 1882 if (c == 0) { 1883 fprintf(stderr, "'%s': unknown argument ('auth ?' for help).\n", 1884 argv[1]); 1885 return 0; 1886 } 1887 if (Ambiguous(c)) { 1888 fprintf(stderr, "'%s': ambiguous argument ('auth ?' for help).\n", 1889 argv[1]); 1890 return 0; 1891 } 1892 if (c->narg + 2 != argc) { 1893 fprintf(stderr, 1894 "Need %s%d argument%s to 'auth %s' command. 'auth ?' for help.\n", 1895 c->narg < argc + 2 ? "only " : "", 1896 c->narg, c->narg == 1 ? "" : "s", c->name); 1897 return 0; 1898 } 1899 return((*c->handler)(argv[2], argv[3])); 1900 } 1901 #endif 1902 1903 #if defined(ENCRYPT) 1904 /* 1905 * The ENCRYPT command. 1906 */ 1907 1908 struct encryptlist { 1909 char *name; 1910 char *help; 1911 int (*handler)(); 1912 int needconnect; 1913 int minarg; 1914 int maxarg; 1915 }; 1916 1917 extern int 1918 EncryptEnable P((char *, char *)), 1919 EncryptDisable P((char *, char *)), 1920 EncryptType P((char *, char *)), 1921 EncryptStart P((char *)), 1922 EncryptStartInput P((void)), 1923 EncryptStartOutput P((void)), 1924 EncryptStop P((char *)), 1925 EncryptStopInput P((void)), 1926 EncryptStopOutput P((void)), 1927 EncryptStatus P((void)), 1928 EncryptHelp P((void)); 1929 1930 struct encryptlist EncryptList[] = { 1931 { "enable", "Enable encryption. ('encrypt enable ?' for more)", 1932 EncryptEnable, 1, 1, 2 }, 1933 { "disable", "Disable encryption. ('encrypt enable ?' for more)", 1934 EncryptDisable, 0, 1, 2 }, 1935 { "type", "Set encryptiong type. ('encrypt type ?' for more)", 1936 EncryptType, 0, 1, 1 }, 1937 { "start", "Start encryption. ('encrypt start ?' for more)", 1938 EncryptStart, 1, 0, 1 }, 1939 { "stop", "Stop encryption. ('encrypt stop ?' for more)", 1940 EncryptStop, 1, 0, 1 }, 1941 { "input", "Start encrypting the input stream", 1942 EncryptStartInput, 1, 0, 0 }, 1943 { "-input", "Stop encrypting the input stream", 1944 EncryptStopInput, 1, 0, 0 }, 1945 { "output", "Start encrypting the output stream", 1946 EncryptStartOutput, 1, 0, 0 }, 1947 { "-output", "Stop encrypting the output stream", 1948 EncryptStopOutput, 1, 0, 0 }, 1949 1950 { "status", "Display current status of authentication information", 1951 EncryptStatus, 0, 0, 0 }, 1952 { "help", 0, EncryptHelp, 0, 0, 0 }, 1953 { "?", "Print help information", EncryptHelp, 0, 0, 0 }, 1954 { 0 }, 1955 }; 1956 1957 static int 1958 EncryptHelp() 1959 { 1960 struct encryptlist *c; 1961 1962 for (c = EncryptList; c->name; c++) { 1963 if (c->help) { 1964 if (*c->help) 1965 printf("%-15s %s\n", c->name, c->help); 1966 else 1967 printf("\n"); 1968 } 1969 } 1970 return 0; 1971 } 1972 1973 encrypt_cmd(argc, argv) 1974 int argc; 1975 char *argv[]; 1976 { 1977 struct encryptlist *c; 1978 1979 c = (struct encryptlist *) 1980 genget(argv[1], (char **) EncryptList, sizeof(struct encryptlist)); 1981 if (c == 0) { 1982 fprintf(stderr, "'%s': unknown argument ('encrypt ?' for help).\n", 1983 argv[1]); 1984 return 0; 1985 } 1986 if (Ambiguous(c)) { 1987 fprintf(stderr, "'%s': ambiguous argument ('encrypt ?' for help).\n", 1988 argv[1]); 1989 return 0; 1990 } 1991 argc -= 2; 1992 if (argc < c->minarg || argc > c->maxarg) { 1993 if (c->minarg == c->maxarg) { 1994 fprintf(stderr, "Need %s%d argument%s ", 1995 c->minarg < argc ? "only " : "", c->minarg, 1996 c->minarg == 1 ? "" : "s"); 1997 } else { 1998 fprintf(stderr, "Need %s%d-%d arguments ", 1999 c->maxarg < argc ? "only " : "", c->minarg, c->maxarg); 2000 } 2001 fprintf(stderr, "to 'encrypt %s' command. 'encrypt ?' for help.\n", 2002 c->name); 2003 return 0; 2004 } 2005 if (c->needconnect && !connected) { 2006 if (!(argc && (isprefix(argv[2], "help") || isprefix(argv[2], "?")))) { 2007 printf("?Need to be connected first.\n"); 2008 return 0; 2009 } 2010 } 2011 return ((*c->handler)(argc > 0 ? argv[2] : 0, 2012 argc > 1 ? argv[3] : 0, 2013 argc > 2 ? argv[4] : 0)); 2014 } 2015 #endif 2016 2017 #if defined(unix) && defined(TN3270) 2018 char *oflgs[] = { "read-only", "write-only", "read-write" }; 2019 static void 2020 filestuff(fd) 2021 int fd; 2022 { 2023 int res; 2024 2025 #ifdef F_GETOWN 2026 setconnmode(0); 2027 res = fcntl(fd, F_GETOWN, 0); 2028 setcommandmode(); 2029 2030 if (res == -1) { 2031 perror("fcntl"); 2032 return; 2033 } 2034 printf("\tOwner is %d.\n", res); 2035 #endif 2036 2037 setconnmode(0); 2038 res = fcntl(fd, F_GETFL, 0); 2039 setcommandmode(); 2040 2041 if (res == -1) { 2042 perror("fcntl"); 2043 return; 2044 } 2045 printf("\tFlags are 0x%x: %s\n", res, oflgs[res]); 2046 } 2047 #endif /* defined(unix) && defined(TN3270) */ 2048 2049 /* 2050 * Print status about the connection. 2051 */ 2052 /*ARGSUSED*/ 2053 static 2054 status(argc, argv) 2055 int argc; 2056 char *argv[]; 2057 { 2058 if (connected) { 2059 printf("Connected to %s.\n", hostname); 2060 if ((argc < 2) || strcmp(argv[1], "notmuch")) { 2061 int mode = getconnmode(); 2062 2063 if (my_want_state_is_will(TELOPT_LINEMODE)) { 2064 printf("Operating with LINEMODE option\n"); 2065 printf("%s line editing\n", (mode&MODE_EDIT) ? "Local" : "No"); 2066 printf("%s catching of signals\n", 2067 (mode&MODE_TRAPSIG) ? "Local" : "No"); 2068 slcstate(); 2069 #ifdef KLUDGELINEMODE 2070 } else if (kludgelinemode && my_want_state_is_dont(TELOPT_SGA)) { 2071 printf("Operating in obsolete linemode\n"); 2072 #endif 2073 } else { 2074 printf("Operating in single character mode\n"); 2075 if (localchars) 2076 printf("Catching signals locally\n"); 2077 } 2078 printf("%s character echo\n", (mode&MODE_ECHO) ? "Local" : "Remote"); 2079 if (my_want_state_is_will(TELOPT_LFLOW)) 2080 printf("%s flow control\n", (mode&MODE_FLOW) ? "Local" : "No"); 2081 #if defined(ENCRYPT) 2082 encrypt_display(); 2083 #endif 2084 } 2085 } else { 2086 printf("No connection.\n"); 2087 } 2088 # if !defined(TN3270) 2089 printf("Escape character is '%s'.\n", control(escape)); 2090 (void) fflush(stdout); 2091 # else /* !defined(TN3270) */ 2092 if ((!In3270) && ((argc < 2) || strcmp(argv[1], "notmuch"))) { 2093 printf("Escape character is '%s'.\n", control(escape)); 2094 } 2095 # if defined(unix) 2096 if ((argc >= 2) && !strcmp(argv[1], "everything")) { 2097 printf("SIGIO received %d time%s.\n", 2098 sigiocount, (sigiocount == 1)? "":"s"); 2099 if (In3270) { 2100 printf("Process ID %d, process group %d.\n", 2101 getpid(), getpgrp(getpid())); 2102 printf("Terminal input:\n"); 2103 filestuff(tin); 2104 printf("Terminal output:\n"); 2105 filestuff(tout); 2106 printf("Network socket:\n"); 2107 filestuff(net); 2108 } 2109 } 2110 if (In3270 && transcom) { 2111 printf("Transparent mode command is '%s'.\n", transcom); 2112 } 2113 # endif /* defined(unix) */ 2114 (void) fflush(stdout); 2115 if (In3270) { 2116 return 0; 2117 } 2118 # endif /* defined(TN3270) */ 2119 return 1; 2120 } 2121 2122 #ifdef SIGINFO 2123 /* 2124 * Function that gets called when SIGINFO is received. 2125 */ 2126 ayt_status() 2127 { 2128 (void) call(status, "status", "notmuch", 0); 2129 } 2130 #endif 2131 2132 int 2133 tn(argc, argv) 2134 int argc; 2135 char *argv[]; 2136 { 2137 register struct hostent *host = 0; 2138 struct sockaddr_in sin; 2139 struct servent *sp = 0; 2140 unsigned long temp; 2141 extern char *inet_ntoa(); 2142 #if defined(IP_OPTIONS) && defined(IPPROTO_IP) 2143 char *srp = 0, *strrchr(); 2144 unsigned long sourceroute(), srlen; 2145 #endif 2146 char *cmd, *hostp = 0, *portp = 0, *user = 0; 2147 2148 /* clear the socket address prior to use */ 2149 bzero((char *)&sin, sizeof(sin)); 2150 2151 if (connected) { 2152 printf("?Already connected to %s\n", hostname); 2153 setuid(getuid()); 2154 return 0; 2155 } 2156 if (argc < 2) { 2157 (void) strcpy(line, "open "); 2158 printf("(to) "); 2159 (void) fgets(&line[strlen(line)], sizeof(line) - strlen(line), stdin); 2160 makeargv(); 2161 argc = margc; 2162 argv = margv; 2163 } 2164 cmd = *argv; 2165 --argc; ++argv; 2166 while (argc) { 2167 if (isprefix(*argv, "help") || isprefix(*argv, "?")) 2168 goto usage; 2169 if (strcmp(*argv, "-l") == 0) { 2170 --argc; ++argv; 2171 if (argc == 0) 2172 goto usage; 2173 user = *argv++; 2174 --argc; 2175 continue; 2176 } 2177 if (strcmp(*argv, "-a") == 0) { 2178 --argc; ++argv; 2179 autologin = 1; 2180 continue; 2181 } 2182 if (hostp == 0) { 2183 hostp = *argv++; 2184 --argc; 2185 continue; 2186 } 2187 if (portp == 0) { 2188 portp = *argv++; 2189 --argc; 2190 continue; 2191 } 2192 usage: 2193 printf("usage: %s [-l user] [-a] host-name [port]\n", cmd); 2194 setuid(getuid()); 2195 return 0; 2196 } 2197 if (hostp == 0) 2198 goto usage; 2199 2200 #if defined(IP_OPTIONS) && defined(IPPROTO_IP) 2201 if (hostp[0] == '@' || hostp[0] == '!') { 2202 if ((hostname = strrchr(hostp, ':')) == NULL) 2203 hostname = strrchr(hostp, '@'); 2204 hostname++; 2205 srp = 0; 2206 temp = sourceroute(hostp, &srp, &srlen); 2207 if (temp == 0) { 2208 herror(srp); 2209 setuid(getuid()); 2210 return 0; 2211 } else if (temp == -1) { 2212 printf("Bad source route option: %s\n", hostp); 2213 setuid(getuid()); 2214 return 0; 2215 } else { 2216 sin.sin_addr.s_addr = temp; 2217 sin.sin_family = AF_INET; 2218 } 2219 } else { 2220 #endif 2221 temp = inet_addr(hostp); 2222 if (temp != (unsigned long) -1) { 2223 sin.sin_addr.s_addr = temp; 2224 sin.sin_family = AF_INET; 2225 (void) strcpy(_hostname, hostp); 2226 hostname = _hostname; 2227 } else { 2228 host = gethostbyname(hostp); 2229 if (host) { 2230 sin.sin_family = host->h_addrtype; 2231 #if defined(h_addr) /* In 4.3, this is a #define */ 2232 memcpy((caddr_t)&sin.sin_addr, 2233 host->h_addr_list[0], host->h_length); 2234 #else /* defined(h_addr) */ 2235 memcpy((caddr_t)&sin.sin_addr, host->h_addr, host->h_length); 2236 #endif /* defined(h_addr) */ 2237 strncpy(_hostname, host->h_name, sizeof(_hostname)); 2238 _hostname[sizeof(_hostname)-1] = '\0'; 2239 hostname = _hostname; 2240 } else { 2241 herror(hostp); 2242 setuid(getuid()); 2243 return 0; 2244 } 2245 } 2246 #if defined(IP_OPTIONS) && defined(IPPROTO_IP) 2247 } 2248 #endif 2249 if (portp) { 2250 if (*portp == '-') { 2251 portp++; 2252 telnetport = 1; 2253 } else 2254 telnetport = 0; 2255 sin.sin_port = atoi(portp); 2256 if (sin.sin_port == 0) { 2257 sp = getservbyname(portp, "tcp"); 2258 if (sp) 2259 sin.sin_port = sp->s_port; 2260 else { 2261 printf("%s: bad port number\n", portp); 2262 setuid(getuid()); 2263 return 0; 2264 } 2265 } else { 2266 #if !defined(htons) 2267 u_short htons(); 2268 #endif /* !defined(htons) */ 2269 sin.sin_port = htons(sin.sin_port); 2270 } 2271 } else { 2272 if (sp == 0) { 2273 sp = getservbyname("telnet", "tcp"); 2274 if (sp == 0) { 2275 fprintf(stderr, "telnet: tcp/telnet: unknown service\n"); 2276 setuid(getuid()); 2277 return 0; 2278 } 2279 sin.sin_port = sp->s_port; 2280 } 2281 telnetport = 1; 2282 } 2283 printf("Trying %s...\n", inet_ntoa(sin.sin_addr)); 2284 do { 2285 net = socket(AF_INET, SOCK_STREAM, 0); 2286 setuid(getuid()); 2287 if (net < 0) { 2288 perror("telnet: socket"); 2289 return 0; 2290 } 2291 #if defined(IP_OPTIONS) && defined(IPPROTO_IP) 2292 if (srp && setsockopt(net, IPPROTO_IP, IP_OPTIONS, (char *)srp, srlen) < 0) 2293 perror("setsockopt (IP_OPTIONS)"); 2294 #endif 2295 #if defined(IPPROTO_IP) && defined(IP_TOS) 2296 { 2297 # if defined(HAS_GETTOS) 2298 struct tosent *tp; 2299 if (tos < 0 && (tp = gettosbyname("telnet", "tcp"))) 2300 tos = tp->t_tos; 2301 # endif 2302 if (tos < 0) 2303 tos = 020; /* Low Delay bit */ 2304 if (tos 2305 && (setsockopt(net, IPPROTO_IP, IP_TOS, &tos, sizeof(int)) < 0) 2306 && (errno != ENOPROTOOPT)) 2307 perror("telnet: setsockopt (IP_TOS) (ignored)"); 2308 } 2309 #endif /* defined(IPPROTO_IP) && defined(IP_TOS) */ 2310 2311 if (debug && SetSockOpt(net, SOL_SOCKET, SO_DEBUG, 1) < 0) { 2312 perror("setsockopt (SO_DEBUG)"); 2313 } 2314 2315 if (connect(net, (struct sockaddr *)&sin, sizeof (sin)) < 0) { 2316 #if defined(h_addr) /* In 4.3, this is a #define */ 2317 if (host && host->h_addr_list[1]) { 2318 int oerrno = errno; 2319 2320 fprintf(stderr, "telnet: connect to address %s: ", 2321 inet_ntoa(sin.sin_addr)); 2322 errno = oerrno; 2323 perror((char *)0); 2324 host->h_addr_list++; 2325 memcpy((caddr_t)&sin.sin_addr, 2326 host->h_addr_list[0], host->h_length); 2327 (void) NetClose(net); 2328 continue; 2329 } 2330 #endif /* defined(h_addr) */ 2331 perror("telnet: Unable to connect to remote host"); 2332 return 0; 2333 } 2334 connected++; 2335 #if defined(AUTHENTICATE) || defined(ENCRYPT) 2336 auth_encrypt_connect(connected); 2337 #endif 2338 } while (connected == 0); 2339 cmdrc(hostp, hostname); 2340 if (autologin && user == NULL) { 2341 struct passwd *pw; 2342 2343 user = getenv("USER"); 2344 if (user == NULL || 2345 (pw = getpwnam(user)) && pw->pw_uid != getuid()) { 2346 if (pw = getpwuid(getuid())) 2347 user = pw->pw_name; 2348 else 2349 user = NULL; 2350 } 2351 } 2352 if (user) { 2353 env_define((unsigned char *)"USER", (unsigned char *)user); 2354 env_export((unsigned char *)"USER"); 2355 } 2356 (void) call(status, "status", "notmuch", 0); 2357 if (setjmp(peerdied) == 0) 2358 telnet(user); 2359 (void) NetClose(net); 2360 ExitString("Connection closed by foreign host.\n",1); 2361 /*NOTREACHED*/ 2362 } 2363 2364 #define HELPINDENT (sizeof ("connect")) 2365 2366 static char 2367 openhelp[] = "connect to a site", 2368 closehelp[] = "close current connection", 2369 logouthelp[] = "forcibly logout remote user and close the connection", 2370 quithelp[] = "exit telnet", 2371 statushelp[] = "print status information", 2372 helphelp[] = "print help information", 2373 sendhelp[] = "transmit special characters ('send ?' for more)", 2374 sethelp[] = "set operating parameters ('set ?' for more)", 2375 unsethelp[] = "unset operating parameters ('unset ?' for more)", 2376 togglestring[] ="toggle operating parameters ('toggle ?' for more)", 2377 slchelp[] = "change state of special charaters ('slc ?' for more)", 2378 displayhelp[] = "display operating parameters", 2379 #if defined(TN3270) && defined(unix) 2380 transcomhelp[] = "specify Unix command for transparent mode pipe", 2381 #endif /* defined(TN3270) && defined(unix) */ 2382 #if defined(AUTHENTICATE) 2383 authhelp[] = "turn on (off) authentication ('auth ?' for more)", 2384 #endif 2385 #if defined(ENCRYPT) 2386 encrypthelp[] = "turn on (off) encryption ('encrypt ?' for more)", 2387 #endif 2388 #if defined(unix) 2389 zhelp[] = "suspend telnet", 2390 #endif /* defined(unix) */ 2391 shellhelp[] = "invoke a subshell", 2392 envhelp[] = "change environment variables ('environ ?' for more)", 2393 modestring[] = "try to enter line or character mode ('mode ?' for more)"; 2394 2395 static int help(); 2396 2397 static Command cmdtab[] = { 2398 { "close", closehelp, bye, 1 }, 2399 { "logout", logouthelp, logout, 1 }, 2400 { "display", displayhelp, display, 0 }, 2401 { "mode", modestring, modecmd, 0 }, 2402 { "open", openhelp, tn, 0 }, 2403 { "quit", quithelp, quit, 0 }, 2404 { "send", sendhelp, sendcmd, 0 }, 2405 { "set", sethelp, setcmd, 0 }, 2406 { "unset", unsethelp, unsetcmd, 0 }, 2407 { "status", statushelp, status, 0 }, 2408 { "toggle", togglestring, toggle, 0 }, 2409 { "slc", slchelp, slccmd, 0 }, 2410 #if defined(TN3270) && defined(unix) 2411 { "transcom", transcomhelp, settranscom, 0 }, 2412 #endif /* defined(TN3270) && defined(unix) */ 2413 #if defined(AUTHENTICATE) 2414 { "auth", authhelp, auth_cmd, 0 }, 2415 #endif 2416 #if defined(ENCRYPT) 2417 { "encrypt", encrypthelp, encrypt_cmd, 0 }, 2418 #endif 2419 #if defined(unix) 2420 { "z", zhelp, suspend, 0 }, 2421 #endif /* defined(unix) */ 2422 #if defined(TN3270) 2423 { "!", shellhelp, shell, 1 }, 2424 #else 2425 { "!", shellhelp, shell, 0 }, 2426 #endif 2427 { "environ", envhelp, env_cmd, 0 }, 2428 { "?", helphelp, help, 0 }, 2429 0 2430 }; 2431 2432 static char crmodhelp[] = "deprecated command -- use 'toggle crmod' instead"; 2433 static char escapehelp[] = "deprecated command -- use 'set escape' instead"; 2434 2435 static Command cmdtab2[] = { 2436 { "help", 0, help, 0 }, 2437 { "escape", escapehelp, setescape, 0 }, 2438 { "crmod", crmodhelp, togcrmod, 0 }, 2439 0 2440 }; 2441 2442 2443 /* 2444 * Call routine with argc, argv set from args (terminated by 0). 2445 */ 2446 2447 /*VARARGS1*/ 2448 static 2449 call(va_alist) 2450 va_dcl 2451 { 2452 va_list ap; 2453 typedef int (*intrtn_t)(); 2454 intrtn_t routine; 2455 char *args[100]; 2456 int argno = 0; 2457 2458 va_start(ap); 2459 routine = (va_arg(ap, intrtn_t)); 2460 while ((args[argno++] = va_arg(ap, char *)) != 0) { 2461 ; 2462 } 2463 va_end(ap); 2464 return (*routine)(argno-1, args); 2465 } 2466 2467 2468 static Command * 2469 getcmd(name) 2470 char *name; 2471 { 2472 Command *cm; 2473 2474 if (cm = (Command *) genget(name, (char **) cmdtab, sizeof(Command))) 2475 return cm; 2476 return (Command *) genget(name, (char **) cmdtab2, sizeof(Command)); 2477 } 2478 2479 void 2480 command(top, tbuf, cnt) 2481 int top; 2482 char *tbuf; 2483 int cnt; 2484 { 2485 register Command *c; 2486 2487 setcommandmode(); 2488 if (!top) { 2489 putchar('\n'); 2490 #if defined(unix) 2491 } else { 2492 (void) signal(SIGINT, SIG_DFL); 2493 (void) signal(SIGQUIT, SIG_DFL); 2494 #endif /* defined(unix) */ 2495 } 2496 for (;;) { 2497 if (rlogin == _POSIX_VDISABLE) 2498 printf("%s> ", prompt); 2499 if (tbuf) { 2500 register char *cp; 2501 cp = line; 2502 while (cnt > 0 && (*cp++ = *tbuf++) != '\n') 2503 cnt--; 2504 tbuf = 0; 2505 if (cp == line || *--cp != '\n' || cp == line) 2506 goto getline; 2507 *cp = '\0'; 2508 if (rlogin == _POSIX_VDISABLE) 2509 printf("%s\n", line); 2510 } else { 2511 getline: 2512 if (rlogin != _POSIX_VDISABLE) 2513 printf("%s> ", prompt); 2514 if (fgets(line, sizeof(line), stdin) == NULL) { 2515 if (feof(stdin) || ferror(stdin)) { 2516 (void) quit(); 2517 /*NOTREACHED*/ 2518 } 2519 break; 2520 } 2521 } 2522 if (line[0] == 0) 2523 break; 2524 makeargv(); 2525 if (margv[0] == 0) { 2526 break; 2527 } 2528 c = getcmd(margv[0]); 2529 if (Ambiguous(c)) { 2530 printf("?Ambiguous command\n"); 2531 continue; 2532 } 2533 if (c == 0) { 2534 printf("?Invalid command\n"); 2535 continue; 2536 } 2537 if (c->needconnect && !connected) { 2538 printf("?Need to be connected first.\n"); 2539 continue; 2540 } 2541 if ((*c->handler)(margc, margv)) { 2542 break; 2543 } 2544 } 2545 if (!top) { 2546 if (!connected) { 2547 longjmp(toplevel, 1); 2548 /*NOTREACHED*/ 2549 } 2550 #if defined(TN3270) 2551 if (shell_active == 0) { 2552 setconnmode(0); 2553 } 2554 #else /* defined(TN3270) */ 2555 setconnmode(0); 2556 #endif /* defined(TN3270) */ 2557 } 2558 } 2559 2560 /* 2561 * Help command. 2562 */ 2563 static 2564 help(argc, argv) 2565 int argc; 2566 char *argv[]; 2567 { 2568 register Command *c; 2569 2570 if (argc == 1) { 2571 printf("Commands may be abbreviated. Commands are:\n\n"); 2572 for (c = cmdtab; c->name; c++) 2573 if (c->help) { 2574 printf("%-*s\t%s\n", HELPINDENT, c->name, 2575 c->help); 2576 } 2577 return 0; 2578 } 2579 while (--argc > 0) { 2580 register char *arg; 2581 arg = *++argv; 2582 c = getcmd(arg); 2583 if (Ambiguous(c)) 2584 printf("?Ambiguous help command %s\n", arg); 2585 else if (c == (Command *)0) 2586 printf("?Invalid help command %s\n", arg); 2587 else 2588 printf("%s\n", c->help); 2589 } 2590 return 0; 2591 } 2592 2593 static char *rcname = 0; 2594 static char rcbuf[128]; 2595 2596 cmdrc(m1, m2) 2597 char *m1, *m2; 2598 { 2599 register Command *c; 2600 FILE *rcfile; 2601 int gotmachine = 0; 2602 int l1 = strlen(m1); 2603 int l2 = strlen(m2); 2604 char m1save[64]; 2605 2606 if (skiprc) 2607 return; 2608 2609 strcpy(m1save, m1); 2610 m1 = m1save; 2611 2612 if (rcname == 0) { 2613 rcname = getenv("HOME"); 2614 if (rcname) 2615 strcpy(rcbuf, rcname); 2616 else 2617 rcbuf[0] = '\0'; 2618 strcat(rcbuf, "/.telnetrc"); 2619 rcname = rcbuf; 2620 } 2621 2622 if ((rcfile = fopen(rcname, "r")) == 0) { 2623 return; 2624 } 2625 2626 for (;;) { 2627 if (fgets(line, sizeof(line), rcfile) == NULL) 2628 break; 2629 if (line[0] == 0) 2630 break; 2631 if (line[0] == '#') 2632 continue; 2633 if (gotmachine) { 2634 if (!isspace(line[0])) 2635 gotmachine = 0; 2636 } 2637 if (gotmachine == 0) { 2638 if (isspace(line[0])) 2639 continue; 2640 if (strncasecmp(line, m1, l1) == 0) 2641 strncpy(line, &line[l1], sizeof(line) - l1); 2642 else if (strncasecmp(line, m2, l2) == 0) 2643 strncpy(line, &line[l2], sizeof(line) - l2); 2644 else if (strncasecmp(line, "DEFAULT", 7) == 0) 2645 strncpy(line, &line[7], sizeof(line) - 7); 2646 else 2647 continue; 2648 if (line[0] != ' ' && line[0] != '\t' && line[0] != '\n') 2649 continue; 2650 gotmachine = 1; 2651 } 2652 makeargv(); 2653 if (margv[0] == 0) 2654 continue; 2655 c = getcmd(margv[0]); 2656 if (Ambiguous(c)) { 2657 printf("?Ambiguous command: %s\n", margv[0]); 2658 continue; 2659 } 2660 if (c == 0) { 2661 printf("?Invalid command: %s\n", margv[0]); 2662 continue; 2663 } 2664 /* 2665 * This should never happen... 2666 */ 2667 if (c->needconnect && !connected) { 2668 printf("?Need to be connected first for %s.\n", margv[0]); 2669 continue; 2670 } 2671 (*c->handler)(margc, margv); 2672 } 2673 fclose(rcfile); 2674 } 2675 2676 #if defined(IP_OPTIONS) && defined(IPPROTO_IP) 2677 2678 /* 2679 * Source route is handed in as 2680 * [!]@hop1@hop2...[@|:]dst 2681 * If the leading ! is present, it is a 2682 * strict source route, otherwise it is 2683 * assmed to be a loose source route. 2684 * 2685 * We fill in the source route option as 2686 * hop1,hop2,hop3...dest 2687 * and return a pointer to hop1, which will 2688 * be the address to connect() to. 2689 * 2690 * Arguments: 2691 * arg: pointer to route list to decipher 2692 * 2693 * cpp: If *cpp is not equal to NULL, this is a 2694 * pointer to a pointer to a character array 2695 * that should be filled in with the option. 2696 * 2697 * lenp: pointer to an integer that contains the 2698 * length of *cpp if *cpp != NULL. 2699 * 2700 * Return values: 2701 * 2702 * Returns the address of the host to connect to. If the 2703 * return value is -1, there was a syntax error in the 2704 * option, either unknown characters, or too many hosts. 2705 * If the return value is 0, one of the hostnames in the 2706 * path is unknown, and *cpp is set to point to the bad 2707 * hostname. 2708 * 2709 * *cpp: If *cpp was equal to NULL, it will be filled 2710 * in with a pointer to our static area that has 2711 * the option filled in. This will be 32bit aligned. 2712 * 2713 * *lenp: This will be filled in with how long the option 2714 * pointed to by *cpp is. 2715 * 2716 */ 2717 unsigned long 2718 sourceroute(arg, cpp, lenp) 2719 char *arg; 2720 char **cpp; 2721 int *lenp; 2722 { 2723 static char lsr[44]; 2724 char *cp, *cp2, *lsrp, *lsrep; 2725 register int tmp; 2726 struct in_addr sin_addr; 2727 register struct hostent *host = 0; 2728 register char c; 2729 2730 /* 2731 * Verify the arguments, and make sure we have 2732 * at least 7 bytes for the option. 2733 */ 2734 if (cpp == NULL || lenp == NULL) 2735 return((unsigned long)-1); 2736 if (*cpp != NULL && *lenp < 7) 2737 return((unsigned long)-1); 2738 /* 2739 * Decide whether we have a buffer passed to us, 2740 * or if we need to use our own static buffer. 2741 */ 2742 if (*cpp) { 2743 lsrp = *cpp; 2744 lsrep = lsrp + *lenp; 2745 } else { 2746 *cpp = lsrp = lsr; 2747 lsrep = lsrp + 44; 2748 } 2749 2750 cp = arg; 2751 2752 /* 2753 * Next, decide whether we have a loose source 2754 * route or a strict source route, and fill in 2755 * the begining of the option. 2756 */ 2757 if (*cp == '!') { 2758 cp++; 2759 *lsrp++ = IPOPT_SSRR; 2760 } else 2761 *lsrp++ = IPOPT_LSRR; 2762 2763 if (*cp != '@') 2764 return((unsigned long)-1); 2765 2766 lsrp++; /* skip over length, we'll fill it in later */ 2767 *lsrp++ = 4; 2768 2769 cp++; 2770 2771 sin_addr.s_addr = 0; 2772 2773 for (c = 0;;) { 2774 if (c == ':') 2775 cp2 = 0; 2776 else for (cp2 = cp; c = *cp2; cp2++) { 2777 if (c == ',') { 2778 *cp2++ = '\0'; 2779 if (*cp2 == '@') 2780 cp2++; 2781 } else if (c == '@') { 2782 *cp2++ = '\0'; 2783 } else if (c == ':') { 2784 *cp2++ = '\0'; 2785 } else 2786 continue; 2787 break; 2788 } 2789 if (!c) 2790 cp2 = 0; 2791 2792 if ((tmp = inet_addr(cp)) != -1) { 2793 sin_addr.s_addr = tmp; 2794 } else if (host = gethostbyname(cp)) { 2795 #if defined(h_addr) 2796 memcpy((caddr_t)&sin_addr, 2797 host->h_addr_list[0], host->h_length); 2798 #else 2799 memcpy((caddr_t)&sin_addr, host->h_addr, host->h_length); 2800 #endif 2801 } else { 2802 *cpp = cp; 2803 return(0); 2804 } 2805 memcpy(lsrp, (char *)&sin_addr, 4); 2806 lsrp += 4; 2807 if (cp2) 2808 cp = cp2; 2809 else 2810 break; 2811 /* 2812 * Check to make sure there is space for next address 2813 */ 2814 if (lsrp + 4 > lsrep) 2815 return((unsigned long)-1); 2816 } 2817 if ((*(*cpp+IPOPT_OLEN) = lsrp - *cpp) <= 7) { 2818 *cpp = 0; 2819 *lenp = 0; 2820 return((unsigned long)-1); 2821 } 2822 *lsrp++ = IPOPT_NOP; /* 32 bit word align it */ 2823 *lenp = lsrp - *cpp; 2824 return(sin_addr.s_addr); 2825 } 2826 #endif 2827