1 /* 2 * Copyright (c) 1988, 1990, 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 #include "telnet_locl.h" 35 36 RCSID("$Id$"); 37 38 #if defined(IPPROTO_IP) && defined(IP_TOS) 39 int tos = -1; 40 #endif /* defined(IPPROTO_IP) && defined(IP_TOS) */ 41 42 char *hostname; 43 static char _hostname[MaxHostNameLen]; 44 45 typedef int (*intrtn_t)(int, char**); 46 static int call(intrtn_t, ...); 47 48 typedef struct { 49 char *name; /* command name */ 50 char *help; /* help string (NULL for no help) */ 51 int (*handler)(); /* routine which executes command */ 52 int needconnect; /* Do we need to be connected to execute? */ 53 } Command; 54 55 static char line[256]; 56 static char saveline[256]; 57 static int margc; 58 static char *margv[20]; 59 60 static void 61 makeargv() 62 { 63 char *cp, *cp2, c; 64 char **argp = margv; 65 66 margc = 0; 67 cp = line; 68 if (*cp == '!') { /* Special case shell escape */ 69 /* save for shell command */ 70 strlcpy(saveline, line, sizeof(saveline)); 71 *argp++ = "!"; /* No room in string to get this */ 72 margc++; 73 cp++; 74 } 75 while ((c = *cp)) { 76 int inquote = 0; 77 while (isspace((unsigned char)c)) 78 c = *++cp; 79 if (c == '\0') 80 break; 81 *argp++ = cp; 82 margc += 1; 83 for (cp2 = cp; c != '\0'; c = *++cp) { 84 if (inquote) { 85 if (c == inquote) { 86 inquote = 0; 87 continue; 88 } 89 } else { 90 if (c == '\\') { 91 if ((c = *++cp) == '\0') 92 break; 93 } else if (c == '"') { 94 inquote = '"'; 95 continue; 96 } else if (c == '\'') { 97 inquote = '\''; 98 continue; 99 } else if (isspace((unsigned char)c)) 100 break; 101 } 102 *cp2++ = c; 103 } 104 *cp2 = '\0'; 105 if (c == '\0') 106 break; 107 cp++; 108 } 109 *argp++ = 0; 110 } 111 112 /* 113 * Make a character string into a number. 114 * 115 * Todo: 1. Could take random integers (12, 0x12, 012, 0b1). 116 */ 117 118 static char 119 special(char *s) 120 { 121 char c; 122 char b; 123 124 switch (*s) { 125 case '^': 126 b = *++s; 127 if (b == '?') { 128 c = b | 0x40; /* DEL */ 129 } else { 130 c = b & 0x1f; 131 } 132 break; 133 default: 134 c = *s; 135 break; 136 } 137 return c; 138 } 139 140 /* 141 * Construct a control character sequence 142 * for a special character. 143 */ 144 static char * 145 control(cc_t c) 146 { 147 static char buf[5]; 148 /* 149 * The only way I could get the Sun 3.5 compiler 150 * to shut up about 151 * if ((unsigned int)c >= 0x80) 152 * was to assign "c" to an unsigned int variable... 153 * Arggg.... 154 */ 155 unsigned int uic = (unsigned int)c; 156 157 if (uic == 0x7f) 158 return ("^?"); 159 if (c == (cc_t)_POSIX_VDISABLE) { 160 return "off"; 161 } 162 if (uic >= 0x80) { 163 buf[0] = '\\'; 164 buf[1] = ((c>>6)&07) + '0'; 165 buf[2] = ((c>>3)&07) + '0'; 166 buf[3] = (c&07) + '0'; 167 buf[4] = 0; 168 } else if (uic >= 0x20) { 169 buf[0] = c; 170 buf[1] = 0; 171 } else { 172 buf[0] = '^'; 173 buf[1] = '@'+c; 174 buf[2] = 0; 175 } 176 return (buf); 177 } 178 179 180 181 /* 182 * The following are data structures and routines for 183 * the "send" command. 184 * 185 */ 186 187 struct sendlist { 188 char *name; /* How user refers to it (case independent) */ 189 char *help; /* Help information (0 ==> no help) */ 190 int needconnect; /* Need to be connected */ 191 int narg; /* Number of arguments */ 192 int (*handler)(); /* Routine to perform (for special ops) */ 193 int nbyte; /* Number of bytes to send this command */ 194 int what; /* Character to be sent (<0 ==> special) */ 195 }; 196 197 198 static int 199 send_esc (void), 200 send_help (void), 201 send_docmd (char *), 202 send_dontcmd (char *), 203 send_willcmd (char *), 204 send_wontcmd (char *); 205 206 static struct sendlist Sendlist[] = { 207 { "ao", "Send Telnet Abort output", 1, 0, 0, 2, AO }, 208 { "ayt", "Send Telnet 'Are You There'", 1, 0, 0, 2, AYT }, 209 { "brk", "Send Telnet Break", 1, 0, 0, 2, BREAK }, 210 { "break", 0, 1, 0, 0, 2, BREAK }, 211 { "ec", "Send Telnet Erase Character", 1, 0, 0, 2, EC }, 212 { "el", "Send Telnet Erase Line", 1, 0, 0, 2, EL }, 213 { "escape", "Send current escape character", 1, 0, send_esc, 1, 0 }, 214 { "ga", "Send Telnet 'Go Ahead' sequence", 1, 0, 0, 2, GA }, 215 { "ip", "Send Telnet Interrupt Process", 1, 0, 0, 2, IP }, 216 { "intp", 0, 1, 0, 0, 2, IP }, 217 { "interrupt", 0, 1, 0, 0, 2, IP }, 218 { "intr", 0, 1, 0, 0, 2, IP }, 219 { "nop", "Send Telnet 'No operation'", 1, 0, 0, 2, NOP }, 220 { "eor", "Send Telnet 'End of Record'", 1, 0, 0, 2, EOR }, 221 { "abort", "Send Telnet 'Abort Process'", 1, 0, 0, 2, ABORT }, 222 { "susp", "Send Telnet 'Suspend Process'", 1, 0, 0, 2, SUSP }, 223 { "eof", "Send Telnet End of File Character", 1, 0, 0, 2, xEOF }, 224 { "synch", "Perform Telnet 'Synch operation'", 1, 0, dosynch, 2, 0 }, 225 { "getstatus", "Send request for STATUS", 1, 0, get_status, 6, 0 }, 226 { "?", "Display send options", 0, 0, send_help, 0, 0 }, 227 { "help", 0, 0, 0, send_help, 0, 0 }, 228 { "do", 0, 0, 1, send_docmd, 3, 0 }, 229 { "dont", 0, 0, 1, send_dontcmd, 3, 0 }, 230 { "will", 0, 0, 1, send_willcmd, 3, 0 }, 231 { "wont", 0, 0, 1, send_wontcmd, 3, 0 }, 232 { 0 } 233 }; 234 235 #define GETSEND(name) ((struct sendlist *) genget(name, (char **) Sendlist, \ 236 sizeof(struct sendlist))) 237 238 static int 239 sendcmd(int argc, char **argv) 240 { 241 int count; /* how many bytes we are going to need to send */ 242 int i; 243 struct sendlist *s; /* pointer to current command */ 244 int success = 0; 245 int needconnect = 0; 246 247 if (argc < 2) { 248 printf("need at least one argument for 'send' command\r\n"); 249 printf("'send ?' for help\r\n"); 250 return 0; 251 } 252 /* 253 * First, validate all the send arguments. 254 * In addition, we see how much space we are going to need, and 255 * whether or not we will be doing a "SYNCH" operation (which 256 * flushes the network queue). 257 */ 258 count = 0; 259 for (i = 1; i < argc; i++) { 260 s = GETSEND(argv[i]); 261 if (s == 0) { 262 printf("Unknown send argument '%s'\r\n'send ?' for help.\r\n", 263 argv[i]); 264 return 0; 265 } else if (Ambiguous(s)) { 266 printf("Ambiguous send argument '%s'\r\n'send ?' for help.\r\n", 267 argv[i]); 268 return 0; 269 } 270 if (i + s->narg >= argc) { 271 fprintf(stderr, 272 "Need %d argument%s to 'send %s' command. 'send %s ?' for help.\r\n", 273 s->narg, s->narg == 1 ? "" : "s", s->name, s->name); 274 return 0; 275 } 276 count += s->nbyte; 277 if (s->handler == send_help) { 278 send_help(); 279 return 0; 280 } 281 282 i += s->narg; 283 needconnect += s->needconnect; 284 } 285 if (!connected && needconnect) { 286 printf("?Need to be connected first.\r\n"); 287 printf("'send ?' for help\r\n"); 288 return 0; 289 } 290 /* Now, do we have enough room? */ 291 if (NETROOM() < count) { 292 printf("There is not enough room in the buffer TO the network\r\n"); 293 printf("to process your request. Nothing will be done.\r\n"); 294 printf("('send synch' will throw away most data in the network\r\n"); 295 printf("buffer, if this might help.)\r\n"); 296 return 0; 297 } 298 /* OK, they are all OK, now go through again and actually send */ 299 count = 0; 300 for (i = 1; i < argc; i++) { 301 if ((s = GETSEND(argv[i])) == 0) { 302 fprintf(stderr, "Telnet 'send' error - argument disappeared!\r\n"); 303 quit(); 304 /*NOTREACHED*/ 305 } 306 if (s->handler) { 307 count++; 308 success += (*s->handler)((s->narg > 0) ? argv[i+1] : 0, 309 (s->narg > 1) ? argv[i+2] : 0); 310 i += s->narg; 311 } else { 312 NET2ADD(IAC, s->what); 313 printoption("SENT", IAC, s->what); 314 } 315 } 316 return (count == success); 317 } 318 319 static int 320 send_tncmd(void (*func)(), char *cmd, char *name); 321 322 static int 323 send_esc() 324 { 325 NETADD(escape); 326 return 1; 327 } 328 329 static int 330 send_docmd(char *name) 331 { 332 return(send_tncmd(send_do, "do", name)); 333 } 334 335 static int 336 send_dontcmd(char *name) 337 { 338 return(send_tncmd(send_dont, "dont", name)); 339 } 340 341 static int 342 send_willcmd(char *name) 343 { 344 return(send_tncmd(send_will, "will", name)); 345 } 346 347 static int 348 send_wontcmd(char *name) 349 { 350 return(send_tncmd(send_wont, "wont", name)); 351 } 352 353 extern char *telopts[]; /* XXX */ 354 355 static int 356 send_tncmd(void (*func)(), char *cmd, char *name) 357 { 358 char **cpp; 359 int val = 0; 360 361 if (isprefix(name, "help") || isprefix(name, "?")) { 362 int col, len; 363 364 printf("Usage: send %s <value|option>\r\n", cmd); 365 printf("\"value\" must be from 0 to 255\r\n"); 366 printf("Valid options are:\r\n\t"); 367 368 col = 8; 369 for (cpp = telopts; *cpp; cpp++) { 370 len = strlen(*cpp) + 3; 371 if (col + len > 65) { 372 printf("\r\n\t"); 373 col = 8; 374 } 375 printf(" \"%s\"", *cpp); 376 col += len; 377 } 378 printf("\r\n"); 379 return 0; 380 } 381 cpp = genget(name, telopts, sizeof(char *)); 382 if (Ambiguous(cpp)) { 383 fprintf(stderr,"'%s': ambiguous argument ('send %s ?' for help).\r\n", 384 name, cmd); 385 return 0; 386 } 387 if (cpp) { 388 val = cpp - telopts; 389 } else { 390 char *cp = name; 391 392 while (*cp >= '0' && *cp <= '9') { 393 val *= 10; 394 val += *cp - '0'; 395 cp++; 396 } 397 if (*cp != 0) { 398 fprintf(stderr, "'%s': unknown argument ('send %s ?' for help).\r\n", 399 name, cmd); 400 return 0; 401 } else if (val < 0 || val > 255) { 402 fprintf(stderr, "'%s': bad value ('send %s ?' for help).\r\n", 403 name, cmd); 404 return 0; 405 } 406 } 407 if (!connected) { 408 printf("?Need to be connected first.\r\n"); 409 return 0; 410 } 411 (*func)(val, 1); 412 return 1; 413 } 414 415 static int 416 send_help() 417 { 418 struct sendlist *s; /* pointer to current command */ 419 for (s = Sendlist; s->name; s++) { 420 if (s->help) 421 printf("%-15s %s\r\n", s->name, s->help); 422 } 423 return(0); 424 } 425 426 /* 427 * The following are the routines and data structures referred 428 * to by the arguments to the "toggle" command. 429 */ 430 431 static int 432 lclchars() 433 { 434 donelclchars = 1; 435 return 1; 436 } 437 438 static int 439 togdebug() 440 { 441 #ifndef NOT43 442 if (net > 0 && 443 (SetSockOpt(net, SOL_SOCKET, SO_DEBUG, debug)) < 0) { 444 perror("setsockopt (SO_DEBUG)"); 445 } 446 #else /* NOT43 */ 447 if (debug) { 448 if (net > 0 && SetSockOpt(net, SOL_SOCKET, SO_DEBUG, 0, 0) < 0) 449 perror("setsockopt (SO_DEBUG)"); 450 } else 451 printf("Cannot turn off socket debugging\r\n"); 452 #endif /* NOT43 */ 453 return 1; 454 } 455 456 static int 457 togcrlf() 458 { 459 if (crlf) { 460 printf("Will send carriage returns as telnet <CR><LF>.\r\n"); 461 } else { 462 printf("Will send carriage returns as telnet <CR><NUL>.\r\n"); 463 } 464 return 1; 465 } 466 467 int binmode; 468 469 static int 470 togbinary(int val) 471 { 472 donebinarytoggle = 1; 473 474 if (val >= 0) { 475 binmode = val; 476 } else { 477 if (my_want_state_is_will(TELOPT_BINARY) && 478 my_want_state_is_do(TELOPT_BINARY)) { 479 binmode = 1; 480 } else if (my_want_state_is_wont(TELOPT_BINARY) && 481 my_want_state_is_dont(TELOPT_BINARY)) { 482 binmode = 0; 483 } 484 val = binmode ? 0 : 1; 485 } 486 487 if (val == 1) { 488 if (my_want_state_is_will(TELOPT_BINARY) && 489 my_want_state_is_do(TELOPT_BINARY)) { 490 printf("Already operating in binary mode with remote host.\r\n"); 491 } else { 492 printf("Negotiating binary mode with remote host.\r\n"); 493 tel_enter_binary(3); 494 } 495 } else { 496 if (my_want_state_is_wont(TELOPT_BINARY) && 497 my_want_state_is_dont(TELOPT_BINARY)) { 498 printf("Already in network ascii mode with remote host.\r\n"); 499 } else { 500 printf("Negotiating network ascii mode with remote host.\r\n"); 501 tel_leave_binary(3); 502 } 503 } 504 return 1; 505 } 506 507 static int 508 togrbinary(int val) 509 { 510 donebinarytoggle = 1; 511 512 if (val == -1) 513 val = my_want_state_is_do(TELOPT_BINARY) ? 0 : 1; 514 515 if (val == 1) { 516 if (my_want_state_is_do(TELOPT_BINARY)) { 517 printf("Already receiving in binary mode.\r\n"); 518 } else { 519 printf("Negotiating binary mode on input.\r\n"); 520 tel_enter_binary(1); 521 } 522 } else { 523 if (my_want_state_is_dont(TELOPT_BINARY)) { 524 printf("Already receiving in network ascii mode.\r\n"); 525 } else { 526 printf("Negotiating network ascii mode on input.\r\n"); 527 tel_leave_binary(1); 528 } 529 } 530 return 1; 531 } 532 533 static int 534 togxbinary(int val) 535 { 536 donebinarytoggle = 1; 537 538 if (val == -1) 539 val = my_want_state_is_will(TELOPT_BINARY) ? 0 : 1; 540 541 if (val == 1) { 542 if (my_want_state_is_will(TELOPT_BINARY)) { 543 printf("Already transmitting in binary mode.\r\n"); 544 } else { 545 printf("Negotiating binary mode on output.\r\n"); 546 tel_enter_binary(2); 547 } 548 } else { 549 if (my_want_state_is_wont(TELOPT_BINARY)) { 550 printf("Already transmitting in network ascii mode.\r\n"); 551 } else { 552 printf("Negotiating network ascii mode on output.\r\n"); 553 tel_leave_binary(2); 554 } 555 } 556 return 1; 557 } 558 559 560 static int togglehelp (void); 561 #if defined(AUTHENTICATION) 562 extern int auth_togdebug (int); 563 #endif 564 #if defined(ENCRYPTION) 565 extern int EncryptAutoEnc (int); 566 extern int EncryptAutoDec (int); 567 extern int EncryptDebug (int); 568 extern int EncryptVerbose (int); 569 #endif 570 571 struct togglelist { 572 char *name; /* name of toggle */ 573 char *help; /* help message */ 574 int (*handler)(); /* routine to do actual setting */ 575 int *variable; 576 char *actionexplanation; 577 }; 578 579 static struct togglelist Togglelist[] = { 580 { "autoflush", 581 "flushing of output when sending interrupt characters", 582 0, 583 &autoflush, 584 "flush output when sending interrupt characters" }, 585 { "autosynch", 586 "automatic sending of interrupt characters in urgent mode", 587 0, 588 &autosynch, 589 "send interrupt characters in urgent mode" }, 590 #if defined(AUTHENTICATION) 591 { "autologin", 592 "automatic sending of login and/or authentication info", 593 0, 594 &autologin, 595 "send login name and/or authentication information" }, 596 { "authdebug", 597 "authentication debugging", 598 auth_togdebug, 599 0, 600 "print authentication debugging information" }, 601 #endif 602 #if defined(ENCRYPTION) 603 { "autoencrypt", 604 "automatic encryption of data stream", 605 EncryptAutoEnc, 606 0, 607 "automatically encrypt output" }, 608 { "autodecrypt", 609 "automatic decryption of data stream", 610 EncryptAutoDec, 611 0, 612 "automatically decrypt input" }, 613 { "verbose_encrypt", 614 "verbose encryption output", 615 EncryptVerbose, 616 0, 617 "print verbose encryption output" }, 618 { "encdebug", 619 "encryption debugging", 620 EncryptDebug, 621 0, 622 "print encryption debugging information" }, 623 #endif 624 #if defined(KRB5) 625 { "forward", 626 "credentials forwarding", 627 kerberos5_set_forward, 628 0, 629 "forward credentials" }, 630 { "forwardable", 631 "forwardable flag of forwarded credentials", 632 kerberos5_set_forwardable, 633 0, 634 "forward forwardable credentials" }, 635 #endif 636 { "skiprc", 637 "don't read ~/.telnetrc file", 638 0, 639 &skiprc, 640 "skip reading of ~/.telnetrc file" }, 641 { "binary", 642 "sending and receiving of binary data", 643 togbinary, 644 0, 645 0 }, 646 { "inbinary", 647 "receiving of binary data", 648 togrbinary, 649 0, 650 0 }, 651 { "outbinary", 652 "sending of binary data", 653 togxbinary, 654 0, 655 0 }, 656 { "crlf", 657 "sending carriage returns as telnet <CR><LF>", 658 togcrlf, 659 &crlf, 660 0 }, 661 { "crmod", 662 "mapping of received carriage returns", 663 0, 664 &crmod, 665 "map carriage return on output" }, 666 { "localchars", 667 "local recognition of certain control characters", 668 lclchars, 669 &localchars, 670 "recognize certain control characters" }, 671 { " ", "", 0 }, /* empty line */ 672 { "debug", 673 "debugging", 674 togdebug, 675 &debug, 676 "turn on socket level debugging" }, 677 { "netdata", 678 "printing of hexadecimal network data (debugging)", 679 0, 680 &netdata, 681 "print hexadecimal representation of network traffic" }, 682 { "prettydump", 683 "output of \"netdata\" to user readable format (debugging)", 684 0, 685 &prettydump, 686 "print user readable output for \"netdata\"" }, 687 { "options", 688 "viewing of options processing (debugging)", 689 0, 690 &showoptions, 691 "show option processing" }, 692 { "termdata", 693 "printing of hexadecimal terminal data (debugging)", 694 0, 695 &termdata, 696 "print hexadecimal representation of terminal traffic" }, 697 { "?", 698 0, 699 togglehelp }, 700 { "help", 701 0, 702 togglehelp }, 703 { 0 } 704 }; 705 706 static int 707 togglehelp() 708 { 709 struct togglelist *c; 710 711 for (c = Togglelist; c->name; c++) { 712 if (c->help) { 713 if (*c->help) 714 printf("%-15s toggle %s\r\n", c->name, c->help); 715 else 716 printf("\r\n"); 717 } 718 } 719 printf("\r\n"); 720 printf("%-15s %s\r\n", "?", "display help information"); 721 return 0; 722 } 723 724 static void 725 settogglehelp(int set) 726 { 727 struct togglelist *c; 728 729 for (c = Togglelist; c->name; c++) { 730 if (c->help) { 731 if (*c->help) 732 printf("%-15s %s %s\r\n", c->name, set ? "enable" : "disable", 733 c->help); 734 else 735 printf("\r\n"); 736 } 737 } 738 } 739 740 #define GETTOGGLE(name) (struct togglelist *) \ 741 genget(name, (char **) Togglelist, sizeof(struct togglelist)) 742 743 static int 744 toggle(int argc, char *argv[]) 745 { 746 int retval = 1; 747 char *name; 748 struct togglelist *c; 749 750 if (argc < 2) { 751 fprintf(stderr, 752 "Need an argument to 'toggle' command. 'toggle ?' for help.\r\n"); 753 return 0; 754 } 755 argc--; 756 argv++; 757 while (argc--) { 758 name = *argv++; 759 c = GETTOGGLE(name); 760 if (Ambiguous(c)) { 761 fprintf(stderr, "'%s': ambiguous argument ('toggle ?' for help).\r\n", 762 name); 763 return 0; 764 } else if (c == 0) { 765 fprintf(stderr, "'%s': unknown argument ('toggle ?' for help).\r\n", 766 name); 767 return 0; 768 } else { 769 if (c->variable) { 770 *c->variable = !*c->variable; /* invert it */ 771 if (c->actionexplanation) { 772 printf("%s %s.\r\n", *c->variable? "Will" : "Won't", 773 c->actionexplanation); 774 } 775 } 776 if (c->handler) { 777 retval &= (*c->handler)(-1); 778 } 779 } 780 } 781 return retval; 782 } 783 784 /* 785 * The following perform the "set" command. 786 */ 787 788 struct termios new_tc = { 0 }; 789 790 struct setlist { 791 char *name; /* name */ 792 char *help; /* help information */ 793 void (*handler)(); 794 cc_t *charp; /* where it is located at */ 795 }; 796 797 static struct setlist Setlist[] = { 798 #ifdef KLUDGELINEMODE 799 { "echo", "character to toggle local echoing on/off", 0, &echoc }, 800 #endif 801 { "escape", "character to escape back to telnet command mode", 0, &escape }, 802 { "rlogin", "rlogin escape character", 0, &rlogin }, 803 { "tracefile", "file to write trace information to", SetNetTrace, (cc_t *)NetTraceFile}, 804 { " ", "" }, 805 { " ", "The following need 'localchars' to be toggled true", 0, 0 }, 806 { "flushoutput", "character to cause an Abort Output", 0, &termFlushChar }, 807 { "interrupt", "character to cause an Interrupt Process", 0, &termIntChar }, 808 { "quit", "character to cause an Abort process", 0, &termQuitChar }, 809 { "eof", "character to cause an EOF ", 0, &termEofChar }, 810 { " ", "" }, 811 { " ", "The following are for local editing in linemode", 0, 0 }, 812 { "erase", "character to use to erase a character", 0, &termEraseChar }, 813 { "kill", "character to use to erase a line", 0, &termKillChar }, 814 { "lnext", "character to use for literal next", 0, &termLiteralNextChar }, 815 { "susp", "character to cause a Suspend Process", 0, &termSuspChar }, 816 { "reprint", "character to use for line reprint", 0, &termRprntChar }, 817 { "worderase", "character to use to erase a word", 0, &termWerasChar }, 818 { "start", "character to use for XON", 0, &termStartChar }, 819 { "stop", "character to use for XOFF", 0, &termStopChar }, 820 { "forw1", "alternate end of line character", 0, &termForw1Char }, 821 { "forw2", "alternate end of line character", 0, &termForw2Char }, 822 { "ayt", "alternate AYT character", 0, &termAytChar }, 823 { 0 } 824 }; 825 826 static struct setlist * 827 getset(char *name) 828 { 829 return (struct setlist *) 830 genget(name, (char **) Setlist, sizeof(struct setlist)); 831 } 832 833 void 834 set_escape_char(char *s) 835 { 836 if (rlogin != _POSIX_VDISABLE) { 837 rlogin = (s && *s) ? special(s) : _POSIX_VDISABLE; 838 printf("Telnet rlogin escape character is '%s'.\r\n", 839 control(rlogin)); 840 } else { 841 escape = (s && *s) ? special(s) : _POSIX_VDISABLE; 842 printf("Telnet escape character is '%s'.\r\n", control(escape)); 843 } 844 } 845 846 static int 847 setcmd(int argc, char *argv[]) 848 { 849 int value; 850 struct setlist *ct; 851 struct togglelist *c; 852 853 if (argc < 2 || argc > 3) { 854 printf("Format is 'set Name Value'\r\n'set ?' for help.\r\n"); 855 return 0; 856 } 857 if ((argc == 2) && (isprefix(argv[1], "?") || isprefix(argv[1], "help"))) { 858 for (ct = Setlist; ct->name; ct++) 859 printf("%-15s %s\r\n", ct->name, ct->help); 860 printf("\r\n"); 861 settogglehelp(1); 862 printf("%-15s %s\r\n", "?", "display help information"); 863 return 0; 864 } 865 866 ct = getset(argv[1]); 867 if (ct == 0) { 868 c = GETTOGGLE(argv[1]); 869 if (c == 0) { 870 fprintf(stderr, "'%s': unknown argument ('set ?' for help).\r\n", 871 argv[1]); 872 return 0; 873 } else if (Ambiguous(c)) { 874 fprintf(stderr, "'%s': ambiguous argument ('set ?' for help).\r\n", 875 argv[1]); 876 return 0; 877 } 878 if (c->variable) { 879 if ((argc == 2) || (strcmp("on", argv[2]) == 0)) 880 *c->variable = 1; 881 else if (strcmp("off", argv[2]) == 0) 882 *c->variable = 0; 883 else { 884 printf("Format is 'set togglename [on|off]'\r\n'set ?' for help.\r\n"); 885 return 0; 886 } 887 if (c->actionexplanation) { 888 printf("%s %s.\r\n", *c->variable? "Will" : "Won't", 889 c->actionexplanation); 890 } 891 } 892 if (c->handler) 893 (*c->handler)(1); 894 } else if (argc != 3) { 895 printf("Format is 'set Name Value'\r\n'set ?' for help.\r\n"); 896 return 0; 897 } else if (Ambiguous(ct)) { 898 fprintf(stderr, "'%s': ambiguous argument ('set ?' for help).\r\n", 899 argv[1]); 900 return 0; 901 } else if (ct->handler) { 902 (*ct->handler)(argv[2]); 903 printf("%s set to \"%s\".\r\n", ct->name, (char *)ct->charp); 904 } else { 905 if (strcmp("off", argv[2])) { 906 value = special(argv[2]); 907 } else { 908 value = _POSIX_VDISABLE; 909 } 910 *(ct->charp) = (cc_t)value; 911 printf("%s character is '%s'.\r\n", ct->name, control(*(ct->charp))); 912 } 913 slc_check(); 914 return 1; 915 } 916 917 static int 918 unsetcmd(int argc, char *argv[]) 919 { 920 struct setlist *ct; 921 struct togglelist *c; 922 char *name; 923 924 if (argc < 2) { 925 fprintf(stderr, 926 "Need an argument to 'unset' command. 'unset ?' for help.\r\n"); 927 return 0; 928 } 929 if (isprefix(argv[1], "?") || isprefix(argv[1], "help")) { 930 for (ct = Setlist; ct->name; ct++) 931 printf("%-15s %s\r\n", ct->name, ct->help); 932 printf("\r\n"); 933 settogglehelp(0); 934 printf("%-15s %s\r\n", "?", "display help information"); 935 return 0; 936 } 937 938 argc--; 939 argv++; 940 while (argc--) { 941 name = *argv++; 942 ct = getset(name); 943 if (ct == 0) { 944 c = GETTOGGLE(name); 945 if (c == 0) { 946 fprintf(stderr, "'%s': unknown argument ('unset ?' for help).\r\n", 947 name); 948 return 0; 949 } else if (Ambiguous(c)) { 950 fprintf(stderr, "'%s': ambiguous argument ('unset ?' for help).\r\n", 951 name); 952 return 0; 953 } 954 if (c->variable) { 955 *c->variable = 0; 956 if (c->actionexplanation) { 957 printf("%s %s.\r\n", *c->variable? "Will" : "Won't", 958 c->actionexplanation); 959 } 960 } 961 if (c->handler) 962 (*c->handler)(0); 963 } else if (Ambiguous(ct)) { 964 fprintf(stderr, "'%s': ambiguous argument ('unset ?' for help).\r\n", 965 name); 966 return 0; 967 } else if (ct->handler) { 968 (*ct->handler)(0); 969 printf("%s reset to \"%s\".\r\n", ct->name, (char *)ct->charp); 970 } else { 971 *(ct->charp) = _POSIX_VDISABLE; 972 printf("%s character is '%s'.\r\n", ct->name, control(*(ct->charp))); 973 } 974 } 975 return 1; 976 } 977 978 /* 979 * The following are the data structures and routines for the 980 * 'mode' command. 981 */ 982 #ifdef KLUDGELINEMODE 983 984 static int 985 dokludgemode(void) 986 { 987 kludgelinemode = 1; 988 send_wont(TELOPT_LINEMODE, 1); 989 send_dont(TELOPT_SGA, 1); 990 send_dont(TELOPT_ECHO, 1); 991 return 1; 992 } 993 #endif 994 995 static int 996 dolinemode() 997 { 998 #ifdef KLUDGELINEMODE 999 if (kludgelinemode) 1000 send_dont(TELOPT_SGA, 1); 1001 #endif 1002 send_will(TELOPT_LINEMODE, 1); 1003 send_dont(TELOPT_ECHO, 1); 1004 return 1; 1005 } 1006 1007 static int 1008 docharmode() 1009 { 1010 #ifdef KLUDGELINEMODE 1011 if (kludgelinemode) 1012 send_do(TELOPT_SGA, 1); 1013 else 1014 #endif 1015 send_wont(TELOPT_LINEMODE, 1); 1016 send_do(TELOPT_ECHO, 1); 1017 return 1; 1018 } 1019 1020 static int 1021 dolmmode(int bit, int on) 1022 { 1023 unsigned char c; 1024 1025 if (my_want_state_is_wont(TELOPT_LINEMODE)) { 1026 printf("?Need to have LINEMODE option enabled first.\r\n"); 1027 printf("'mode ?' for help.\r\n"); 1028 return 0; 1029 } 1030 1031 if (on) 1032 c = (linemode | bit); 1033 else 1034 c = (linemode & ~bit); 1035 lm_mode(&c, 1, 1); 1036 return 1; 1037 } 1038 1039 static int 1040 tn_setmode(int bit) 1041 { 1042 return dolmmode(bit, 1); 1043 } 1044 1045 static int 1046 tn_clearmode(int bit) 1047 { 1048 return dolmmode(bit, 0); 1049 } 1050 1051 struct modelist { 1052 char *name; /* command name */ 1053 char *help; /* help string */ 1054 int (*handler)(); /* routine which executes command */ 1055 int needconnect; /* Do we need to be connected to execute? */ 1056 int arg1; 1057 }; 1058 1059 static int modehelp(void); 1060 1061 static struct modelist ModeList[] = { 1062 { "character", "Disable LINEMODE option", docharmode, 1 }, 1063 #ifdef KLUDGELINEMODE 1064 { "", "(or disable obsolete line-by-line mode)", 0 }, 1065 #endif 1066 { "line", "Enable LINEMODE option", dolinemode, 1 }, 1067 #ifdef KLUDGELINEMODE 1068 { "", "(or enable obsolete line-by-line mode)", 0 }, 1069 #endif 1070 { "", "", 0 }, 1071 { "", "These require the LINEMODE option to be enabled", 0 }, 1072 { "isig", "Enable signal trapping", tn_setmode, 1, MODE_TRAPSIG }, 1073 { "+isig", 0, tn_setmode, 1, MODE_TRAPSIG }, 1074 { "-isig", "Disable signal trapping", tn_clearmode, 1, MODE_TRAPSIG }, 1075 { "edit", "Enable character editing", tn_setmode, 1, MODE_EDIT }, 1076 { "+edit", 0, tn_setmode, 1, MODE_EDIT }, 1077 { "-edit", "Disable character editing", tn_clearmode, 1, MODE_EDIT }, 1078 { "softtabs", "Enable tab expansion", tn_setmode, 1, MODE_SOFT_TAB }, 1079 { "+softtabs", 0, tn_setmode, 1, MODE_SOFT_TAB }, 1080 { "-softtabs", "Disable tab expansion", tn_clearmode, 1, MODE_SOFT_TAB }, 1081 { "litecho", "Enable literal character echo", tn_setmode, 1, MODE_LIT_ECHO }, 1082 { "+litecho", 0, tn_setmode, 1, MODE_LIT_ECHO }, 1083 { "-litecho", "Disable literal character echo", tn_clearmode, 1, MODE_LIT_ECHO }, 1084 { "help", 0, modehelp, 0 }, 1085 #ifdef KLUDGELINEMODE 1086 { "kludgeline", 0, dokludgemode, 1 }, 1087 #endif 1088 { "", "", 0 }, 1089 { "?", "Print help information", modehelp, 0 }, 1090 { 0 }, 1091 }; 1092 1093 1094 static int 1095 modehelp(void) 1096 { 1097 struct modelist *mt; 1098 1099 printf("format is: 'mode Mode', where 'Mode' is one of:\r\n\r\n"); 1100 for (mt = ModeList; mt->name; mt++) { 1101 if (mt->help) { 1102 if (*mt->help) 1103 printf("%-15s %s\r\n", mt->name, mt->help); 1104 else 1105 printf("\r\n"); 1106 } 1107 } 1108 return 0; 1109 } 1110 1111 #define GETMODECMD(name) (struct modelist *) \ 1112 genget(name, (char **) ModeList, sizeof(struct modelist)) 1113 1114 static int 1115 modecmd(int argc, char **argv) 1116 { 1117 struct modelist *mt; 1118 1119 if (argc != 2) { 1120 printf("'mode' command requires an argument\r\n"); 1121 printf("'mode ?' for help.\r\n"); 1122 } else if ((mt = GETMODECMD(argv[1])) == 0) { 1123 fprintf(stderr, "Unknown mode '%s' ('mode ?' for help).\r\n", argv[1]); 1124 } else if (Ambiguous(mt)) { 1125 fprintf(stderr, "Ambiguous mode '%s' ('mode ?' for help).\r\n", argv[1]); 1126 } else if (mt->needconnect && !connected) { 1127 printf("?Need to be connected first.\r\n"); 1128 printf("'mode ?' for help.\r\n"); 1129 } else if (mt->handler) { 1130 return (*mt->handler)(mt->arg1); 1131 } 1132 return 0; 1133 } 1134 1135 /* 1136 * The following data structures and routines implement the 1137 * "display" command. 1138 */ 1139 1140 static int 1141 display(int argc, char *argv[]) 1142 { 1143 struct togglelist *tl; 1144 struct setlist *sl; 1145 1146 #define dotog(tl) if (tl->variable && tl->actionexplanation) { \ 1147 if (*tl->variable) { \ 1148 printf("will"); \ 1149 } else { \ 1150 printf("won't"); \ 1151 } \ 1152 printf(" %s.\r\n", tl->actionexplanation); \ 1153 } 1154 1155 #define doset(sl) if (sl->name && *sl->name != ' ') { \ 1156 if (sl->handler == 0) \ 1157 printf("%-15s [%s]\r\n", sl->name, control(*sl->charp)); \ 1158 else \ 1159 printf("%-15s \"%s\"\r\n", sl->name, (char *)sl->charp); \ 1160 } 1161 1162 if (argc == 1) { 1163 for (tl = Togglelist; tl->name; tl++) { 1164 dotog(tl); 1165 } 1166 printf("\r\n"); 1167 for (sl = Setlist; sl->name; sl++) { 1168 doset(sl); 1169 } 1170 } else { 1171 int i; 1172 1173 for (i = 1; i < argc; i++) { 1174 sl = getset(argv[i]); 1175 tl = GETTOGGLE(argv[i]); 1176 if (Ambiguous(sl) || Ambiguous(tl)) { 1177 printf("?Ambiguous argument '%s'.\r\n", argv[i]); 1178 return 0; 1179 } else if (!sl && !tl) { 1180 printf("?Unknown argument '%s'.\r\n", argv[i]); 1181 return 0; 1182 } else { 1183 if (tl) { 1184 dotog(tl); 1185 } 1186 if (sl) { 1187 doset(sl); 1188 } 1189 } 1190 } 1191 } 1192 /*@*/optionstatus(); 1193 #if defined(ENCRYPTION) 1194 EncryptStatus(); 1195 #endif 1196 return 1; 1197 #undef doset 1198 #undef dotog 1199 } 1200 1201 /* 1202 * The following are the data structures, and many of the routines, 1203 * relating to command processing. 1204 */ 1205 1206 /* 1207 * Set the escape character. 1208 */ 1209 static int 1210 setescape(int argc, char *argv[]) 1211 { 1212 char *arg; 1213 char buf[50]; 1214 1215 printf( 1216 "Deprecated usage - please use 'set escape%s%s' in the future.\r\n", 1217 (argc > 2)? " ":"", (argc > 2)? argv[1]: ""); 1218 if (argc > 2) 1219 arg = argv[1]; 1220 else { 1221 printf("new escape character: "); 1222 fgets(buf, sizeof(buf), stdin); 1223 arg = buf; 1224 } 1225 if (arg[0] != '\0') 1226 escape = arg[0]; 1227 printf("Escape character is '%s'.\r\n", control(escape)); 1228 1229 fflush(stdout); 1230 return 1; 1231 } 1232 1233 static int 1234 togcrmod() 1235 { 1236 crmod = !crmod; 1237 printf("Deprecated usage - please use 'toggle crmod' in the future.\r\n"); 1238 printf("%s map carriage return on output.\r\n", crmod ? "Will" : "Won't"); 1239 fflush(stdout); 1240 return 1; 1241 } 1242 1243 static int 1244 telnetsuspend() 1245 { 1246 #ifdef SIGTSTP 1247 setcommandmode(); 1248 { 1249 long oldrows, oldcols, newrows, newcols, err; 1250 1251 err = (TerminalWindowSize(&oldrows, &oldcols) == 0) ? 1 : 0; 1252 kill(0, SIGTSTP); 1253 /* 1254 * If we didn't get the window size before the SUSPEND, but we 1255 * can get them now (?), then send the NAWS to make sure that 1256 * we are set up for the right window size. 1257 */ 1258 if (TerminalWindowSize(&newrows, &newcols) && connected && 1259 (err || ((oldrows != newrows) || (oldcols != newcols)))) { 1260 sendnaws(); 1261 } 1262 } 1263 /* reget parameters in case they were changed */ 1264 TerminalSaveState(); 1265 setconnmode(0); 1266 #else 1267 printf("Suspend is not supported. Try the '!' command instead\r\n"); 1268 #endif 1269 return 1; 1270 } 1271 1272 static int 1273 shell(int argc, char **argv) 1274 { 1275 long oldrows, oldcols, newrows, newcols, err; 1276 1277 setcommandmode(); 1278 1279 err = (TerminalWindowSize(&oldrows, &oldcols) == 0) ? 1 : 0; 1280 switch(fork()) { 1281 case -1: 1282 perror("Fork failed\r\n"); 1283 break; 1284 1285 case 0: 1286 { 1287 /* 1288 * Fire up the shell in the child. 1289 */ 1290 char *shellp, *shellname; 1291 1292 shellp = getenv("SHELL"); 1293 if (shellp == NULL) 1294 shellp = "/bin/sh"; 1295 if ((shellname = strrchr(shellp, '/')) == 0) 1296 shellname = shellp; 1297 else 1298 shellname++; 1299 if (argc > 1) 1300 execl(shellp, shellname, "-c", &saveline[1], NULL); 1301 else 1302 execl(shellp, shellname, NULL); 1303 perror("Execl"); 1304 _exit(1); 1305 } 1306 default: 1307 wait((int *)0); /* Wait for the shell to complete */ 1308 1309 if (TerminalWindowSize(&newrows, &newcols) && connected && 1310 (err || ((oldrows != newrows) || (oldcols != newcols)))) { 1311 sendnaws(); 1312 } 1313 break; 1314 } 1315 return 1; 1316 } 1317 1318 static int 1319 bye(int argc, char **argv) 1320 { 1321 if (connected) { 1322 shutdown(net, 2); 1323 printf("Connection closed.\r\n"); 1324 NetClose(net); 1325 connected = 0; 1326 resettermname = 1; 1327 #if defined(AUTHENTICATION) || defined(ENCRYPTION) 1328 auth_encrypt_connect(connected); 1329 #endif 1330 /* reset options */ 1331 tninit(); 1332 } 1333 if ((argc != 2) || (strcmp(argv[1], "fromquit") != 0)) 1334 longjmp(toplevel, 1); 1335 return 0; /* NOTREACHED */ 1336 } 1337 1338 int 1339 quit(void) 1340 { 1341 call(bye, "bye", "fromquit", 0); 1342 Exit(0); 1343 return 0; /*NOTREACHED*/ 1344 } 1345 1346 static int 1347 logout() 1348 { 1349 send_do(TELOPT_LOGOUT, 1); 1350 netflush(); 1351 return 1; 1352 } 1353 1354 1355 /* 1356 * The SLC command. 1357 */ 1358 1359 struct slclist { 1360 char *name; 1361 char *help; 1362 void (*handler)(); 1363 int arg; 1364 }; 1365 1366 static void slc_help(void); 1367 1368 struct slclist SlcList[] = { 1369 { "export", "Use local special character definitions", 1370 slc_mode_export, 0 }, 1371 { "import", "Use remote special character definitions", 1372 slc_mode_import, 1 }, 1373 { "check", "Verify remote special character definitions", 1374 slc_mode_import, 0 }, 1375 { "help", 0, slc_help, 0 }, 1376 { "?", "Print help information", slc_help, 0 }, 1377 { 0 }, 1378 }; 1379 1380 static void 1381 slc_help(void) 1382 { 1383 struct slclist *c; 1384 1385 for (c = SlcList; c->name; c++) { 1386 if (c->help) { 1387 if (*c->help) 1388 printf("%-15s %s\r\n", c->name, c->help); 1389 else 1390 printf("\r\n"); 1391 } 1392 } 1393 } 1394 1395 static struct slclist * 1396 getslc(char *name) 1397 { 1398 return (struct slclist *) 1399 genget(name, (char **) SlcList, sizeof(struct slclist)); 1400 } 1401 1402 static int 1403 slccmd(int argc, char **argv) 1404 { 1405 struct slclist *c; 1406 1407 if (argc != 2) { 1408 fprintf(stderr, 1409 "Need an argument to 'slc' command. 'slc ?' for help.\r\n"); 1410 return 0; 1411 } 1412 c = getslc(argv[1]); 1413 if (c == 0) { 1414 fprintf(stderr, "'%s': unknown argument ('slc ?' for help).\r\n", 1415 argv[1]); 1416 return 0; 1417 } 1418 if (Ambiguous(c)) { 1419 fprintf(stderr, "'%s': ambiguous argument ('slc ?' for help).\r\n", 1420 argv[1]); 1421 return 0; 1422 } 1423 (*c->handler)(c->arg); 1424 slcstate(); 1425 return 1; 1426 } 1427 1428 /* 1429 * The ENVIRON command. 1430 */ 1431 1432 struct envlist { 1433 char *name; 1434 char *help; 1435 void (*handler)(); 1436 int narg; 1437 }; 1438 1439 static void env_help (void); 1440 1441 struct envlist EnvList[] = { 1442 { "define", "Define an environment variable", 1443 (void (*)())env_define, 2 }, 1444 { "undefine", "Undefine an environment variable", 1445 env_undefine, 1 }, 1446 { "export", "Mark an environment variable for automatic export", 1447 env_export, 1 }, 1448 { "unexport", "Don't mark an environment variable for automatic export", 1449 env_unexport, 1 }, 1450 { "send", "Send an environment variable", env_send, 1 }, 1451 { "list", "List the current environment variables", 1452 env_list, 0 }, 1453 { "help", 0, env_help, 0 }, 1454 { "?", "Print help information", env_help, 0 }, 1455 { 0 }, 1456 }; 1457 1458 static void 1459 env_help() 1460 { 1461 struct envlist *c; 1462 1463 for (c = EnvList; c->name; c++) { 1464 if (c->help) { 1465 if (*c->help) 1466 printf("%-15s %s\r\n", c->name, c->help); 1467 else 1468 printf("\r\n"); 1469 } 1470 } 1471 } 1472 1473 static struct envlist * 1474 getenvcmd(char *name) 1475 { 1476 return (struct envlist *) 1477 genget(name, (char **) EnvList, sizeof(struct envlist)); 1478 } 1479 1480 static int 1481 env_cmd(int argc, char **argv) 1482 { 1483 struct envlist *c; 1484 1485 if (argc < 2) { 1486 fprintf(stderr, 1487 "Need an argument to 'environ' command. 'environ ?' for help.\r\n"); 1488 return 0; 1489 } 1490 c = getenvcmd(argv[1]); 1491 if (c == 0) { 1492 fprintf(stderr, "'%s': unknown argument ('environ ?' for help).\r\n", 1493 argv[1]); 1494 return 0; 1495 } 1496 if (Ambiguous(c)) { 1497 fprintf(stderr, "'%s': ambiguous argument ('environ ?' for help).\r\n", 1498 argv[1]); 1499 return 0; 1500 } 1501 if (c->narg + 2 != argc) { 1502 fprintf(stderr, 1503 "Need %s%d argument%s to 'environ %s' command. 'environ ?' for help.\r\n", 1504 c->narg < argc + 2 ? "only " : "", 1505 c->narg, c->narg == 1 ? "" : "s", c->name); 1506 return 0; 1507 } 1508 (*c->handler)(argv[2], argv[3]); 1509 return 1; 1510 } 1511 1512 struct env_lst { 1513 struct env_lst *next; /* pointer to next structure */ 1514 struct env_lst *prev; /* pointer to previous structure */ 1515 unsigned char *var; /* pointer to variable name */ 1516 unsigned char *value; /* pointer to variable value */ 1517 int export; /* 1 -> export with default list of variables */ 1518 int welldefined; /* A well defined variable */ 1519 }; 1520 1521 struct env_lst envlisthead; 1522 1523 struct env_lst * 1524 env_find(unsigned char *var) 1525 { 1526 struct env_lst *ep; 1527 1528 for (ep = envlisthead.next; ep; ep = ep->next) { 1529 if (strcmp((char *)ep->var, (char *)var) == 0) 1530 return(ep); 1531 } 1532 return(NULL); 1533 } 1534 1535 #if !HAVE_DECL_ENVIRON 1536 extern char **environ; 1537 #endif 1538 1539 void 1540 env_init(void) 1541 { 1542 char **epp, *cp; 1543 struct env_lst *ep; 1544 1545 for (epp = environ; *epp; epp++) { 1546 if ((cp = strchr(*epp, '='))) { 1547 *cp = '\0'; 1548 ep = env_define((unsigned char *)*epp, 1549 (unsigned char *)cp+1); 1550 ep->export = 0; 1551 *cp = '='; 1552 } 1553 } 1554 /* 1555 * Special case for DISPLAY variable. If it is ":0.0" or 1556 * "unix:0.0", we have to get rid of "unix" and insert our 1557 * hostname. 1558 */ 1559 if ((ep = env_find((unsigned char*)"DISPLAY")) 1560 && (*ep->value == ':' 1561 || strncmp((char *)ep->value, "unix:", 5) == 0)) { 1562 char hbuf[256+1]; 1563 char *cp2 = strchr((char *)ep->value, ':'); 1564 int error; 1565 1566 /* XXX - should be k_gethostname? */ 1567 gethostname(hbuf, 256); 1568 hbuf[256] = '\0'; 1569 1570 /* If this is not the full name, try to get it via DNS */ 1571 if (strchr(hbuf, '.') == 0) { 1572 struct addrinfo hints, *ai, *a; 1573 1574 memset (&hints, 0, sizeof(hints)); 1575 hints.ai_flags = AI_CANONNAME; 1576 1577 error = getaddrinfo (hbuf, NULL, &hints, &ai); 1578 if (error == 0) { 1579 for (a = ai; a != NULL; a = a->ai_next) 1580 if (a->ai_canonname != NULL) { 1581 strlcpy (hbuf, 1582 ai->ai_canonname, 1583 256); 1584 break; 1585 } 1586 freeaddrinfo (ai); 1587 } 1588 } 1589 1590 error = asprintf (&cp, "%s%s", hbuf, cp2); 1591 if (error != -1) { 1592 free (ep->value); 1593 ep->value = (unsigned char *)cp; 1594 } 1595 } 1596 /* 1597 * If USER is not defined, but LOGNAME is, then add 1598 * USER with the value from LOGNAME. By default, we 1599 * don't export the USER variable. 1600 */ 1601 if ((env_find((unsigned char*)"USER") == NULL) && 1602 (ep = env_find((unsigned char*)"LOGNAME"))) { 1603 env_define((unsigned char *)"USER", ep->value); 1604 env_unexport((unsigned char *)"USER"); 1605 } 1606 env_export((unsigned char *)"DISPLAY"); 1607 env_export((unsigned char *)"PRINTER"); 1608 env_export((unsigned char *)"XAUTHORITY"); 1609 } 1610 1611 struct env_lst * 1612 env_define(unsigned char *var, unsigned char *value) 1613 { 1614 struct env_lst *ep; 1615 1616 if ((ep = env_find(var))) { 1617 if (ep->var) 1618 free(ep->var); 1619 if (ep->value) 1620 free(ep->value); 1621 } else { 1622 ep = (struct env_lst *)malloc(sizeof(struct env_lst)); 1623 ep->next = envlisthead.next; 1624 envlisthead.next = ep; 1625 ep->prev = &envlisthead; 1626 if (ep->next) 1627 ep->next->prev = ep; 1628 } 1629 ep->welldefined = opt_welldefined((char *)var); 1630 ep->export = 1; 1631 ep->var = (unsigned char *)strdup((char *)var); 1632 ep->value = (unsigned char *)strdup((char *)value); 1633 return(ep); 1634 } 1635 1636 void 1637 env_undefine(unsigned char *var) 1638 { 1639 struct env_lst *ep; 1640 1641 if ((ep = env_find(var))) { 1642 ep->prev->next = ep->next; 1643 if (ep->next) 1644 ep->next->prev = ep->prev; 1645 if (ep->var) 1646 free(ep->var); 1647 if (ep->value) 1648 free(ep->value); 1649 free(ep); 1650 } 1651 } 1652 1653 void 1654 env_export(unsigned char *var) 1655 { 1656 struct env_lst *ep; 1657 1658 if ((ep = env_find(var))) 1659 ep->export = 1; 1660 } 1661 1662 void 1663 env_unexport(unsigned char *var) 1664 { 1665 struct env_lst *ep; 1666 1667 if ((ep = env_find(var))) 1668 ep->export = 0; 1669 } 1670 1671 void 1672 env_send(unsigned char *var) 1673 { 1674 struct env_lst *ep; 1675 1676 if (my_state_is_wont(TELOPT_NEW_ENVIRON) 1677 #ifdef OLD_ENVIRON 1678 && my_state_is_wont(TELOPT_OLD_ENVIRON) 1679 #endif 1680 ) { 1681 fprintf(stderr, 1682 "Cannot send '%s': Telnet ENVIRON option not enabled\r\n", 1683 var); 1684 return; 1685 } 1686 ep = env_find(var); 1687 if (ep == 0) { 1688 fprintf(stderr, "Cannot send '%s': variable not defined\r\n", 1689 var); 1690 return; 1691 } 1692 env_opt_start_info(); 1693 env_opt_add(ep->var); 1694 env_opt_end(0); 1695 } 1696 1697 void 1698 env_list(void) 1699 { 1700 struct env_lst *ep; 1701 1702 for (ep = envlisthead.next; ep; ep = ep->next) { 1703 printf("%c %-20s %s\r\n", ep->export ? '*' : ' ', 1704 ep->var, ep->value); 1705 } 1706 } 1707 1708 unsigned char * 1709 env_default(int init, int welldefined) 1710 { 1711 static struct env_lst *nep = NULL; 1712 1713 if (init) { 1714 nep = &envlisthead; 1715 return NULL; 1716 } 1717 if (nep) { 1718 while ((nep = nep->next)) { 1719 if (nep->export && (nep->welldefined == welldefined)) 1720 return(nep->var); 1721 } 1722 } 1723 return(NULL); 1724 } 1725 1726 unsigned char * 1727 env_getvalue(unsigned char *var) 1728 { 1729 struct env_lst *ep; 1730 1731 if ((ep = env_find(var))) 1732 return(ep->value); 1733 return(NULL); 1734 } 1735 1736 1737 #if defined(AUTHENTICATION) 1738 /* 1739 * The AUTHENTICATE command. 1740 */ 1741 1742 struct authlist { 1743 char *name; 1744 char *help; 1745 int (*handler)(); 1746 int narg; 1747 }; 1748 1749 static int 1750 auth_help (void); 1751 1752 struct authlist AuthList[] = { 1753 { "status", "Display current status of authentication information", 1754 auth_status, 0 }, 1755 { "disable", "Disable an authentication type ('auth disable ?' for more)", 1756 auth_disable, 1 }, 1757 { "enable", "Enable an authentication type ('auth enable ?' for more)", 1758 auth_enable, 1 }, 1759 { "help", 0, auth_help, 0 }, 1760 { "?", "Print help information", auth_help, 0 }, 1761 { 0 }, 1762 }; 1763 1764 static int 1765 auth_help() 1766 { 1767 struct authlist *c; 1768 1769 for (c = AuthList; c->name; c++) { 1770 if (c->help) { 1771 if (*c->help) 1772 printf("%-15s %s\r\n", c->name, c->help); 1773 else 1774 printf("\r\n"); 1775 } 1776 } 1777 return 0; 1778 } 1779 1780 static int 1781 auth_cmd(int argc, char **argv) 1782 { 1783 struct authlist *c; 1784 1785 if (argc < 2) { 1786 fprintf(stderr, 1787 "Need an argument to 'auth' command. 'auth ?' for help.\r\n"); 1788 return 0; 1789 } 1790 1791 c = (struct authlist *) 1792 genget(argv[1], (char **) AuthList, sizeof(struct authlist)); 1793 if (c == 0) { 1794 fprintf(stderr, "'%s': unknown argument ('auth ?' for help).\r\n", 1795 argv[1]); 1796 return 0; 1797 } 1798 if (Ambiguous(c)) { 1799 fprintf(stderr, "'%s': ambiguous argument ('auth ?' for help).\r\n", 1800 argv[1]); 1801 return 0; 1802 } 1803 if (c->narg + 2 != argc) { 1804 fprintf(stderr, 1805 "Need %s%d argument%s to 'auth %s' command. 'auth ?' for help.\r\n", 1806 c->narg < argc + 2 ? "only " : "", 1807 c->narg, c->narg == 1 ? "" : "s", c->name); 1808 return 0; 1809 } 1810 return((*c->handler)(argv[2], argv[3])); 1811 } 1812 #endif 1813 1814 1815 #if defined(ENCRYPTION) 1816 /* 1817 * The ENCRYPT command. 1818 */ 1819 1820 struct encryptlist { 1821 char *name; 1822 char *help; 1823 int (*handler)(); 1824 int needconnect; 1825 int minarg; 1826 int maxarg; 1827 }; 1828 1829 static int 1830 EncryptHelp (void); 1831 1832 struct encryptlist EncryptList[] = { 1833 { "enable", "Enable encryption. ('encrypt enable ?' for more)", 1834 EncryptEnable, 1, 1, 2 }, 1835 { "disable", "Disable encryption. ('encrypt enable ?' for more)", 1836 EncryptDisable, 0, 1, 2 }, 1837 { "type", "Set encryptiong type. ('encrypt type ?' for more)", 1838 EncryptType, 0, 1, 1 }, 1839 { "start", "Start encryption. ('encrypt start ?' for more)", 1840 EncryptStart, 1, 0, 1 }, 1841 { "stop", "Stop encryption. ('encrypt stop ?' for more)", 1842 EncryptStop, 1, 0, 1 }, 1843 { "input", "Start encrypting the input stream", 1844 EncryptStartInput, 1, 0, 0 }, 1845 { "-input", "Stop encrypting the input stream", 1846 EncryptStopInput, 1, 0, 0 }, 1847 { "output", "Start encrypting the output stream", 1848 EncryptStartOutput, 1, 0, 0 }, 1849 { "-output", "Stop encrypting the output stream", 1850 EncryptStopOutput, 1, 0, 0 }, 1851 1852 { "status", "Display current status of authentication information", 1853 EncryptStatus, 0, 0, 0 }, 1854 { "help", 0, EncryptHelp, 0, 0, 0 }, 1855 { "?", "Print help information", EncryptHelp, 0, 0, 0 }, 1856 { 0 }, 1857 }; 1858 1859 static int 1860 EncryptHelp() 1861 { 1862 struct encryptlist *c; 1863 1864 for (c = EncryptList; c->name; c++) { 1865 if (c->help) { 1866 if (*c->help) 1867 printf("%-15s %s\r\n", c->name, c->help); 1868 else 1869 printf("\r\n"); 1870 } 1871 } 1872 return 0; 1873 } 1874 1875 static int 1876 encrypt_cmd(int argc, char **argv) 1877 { 1878 struct encryptlist *c; 1879 1880 c = (struct encryptlist *) 1881 genget(argv[1], (char **) EncryptList, sizeof(struct encryptlist)); 1882 if (c == 0) { 1883 fprintf(stderr, "'%s': unknown argument ('encrypt ?' for help).\r\n", 1884 argv[1]); 1885 return 0; 1886 } 1887 if (Ambiguous(c)) { 1888 fprintf(stderr, "'%s': ambiguous argument ('encrypt ?' for help).\r\n", 1889 argv[1]); 1890 return 0; 1891 } 1892 argc -= 2; 1893 if (argc < c->minarg || argc > c->maxarg) { 1894 if (c->minarg == c->maxarg) { 1895 fprintf(stderr, "Need %s%d argument%s ", 1896 c->minarg < argc ? "only " : "", c->minarg, 1897 c->minarg == 1 ? "" : "s"); 1898 } else { 1899 fprintf(stderr, "Need %s%d-%d arguments ", 1900 c->maxarg < argc ? "only " : "", c->minarg, c->maxarg); 1901 } 1902 fprintf(stderr, "to 'encrypt %s' command. 'encrypt ?' for help.\r\n", 1903 c->name); 1904 return 0; 1905 } 1906 if (c->needconnect && !connected) { 1907 if (!(argc && (isprefix(argv[2], "help") || isprefix(argv[2], "?")))) { 1908 printf("?Need to be connected first.\r\n"); 1909 return 0; 1910 } 1911 } 1912 return ((*c->handler)(argc > 0 ? argv[2] : 0, 1913 argc > 1 ? argv[3] : 0, 1914 argc > 2 ? argv[4] : 0)); 1915 } 1916 #endif 1917 1918 1919 /* 1920 * Print status about the connection. 1921 */ 1922 1923 static int 1924 status(int argc, char **argv) 1925 { 1926 if (connected) { 1927 printf("Connected to %s.\r\n", hostname); 1928 if ((argc < 2) || strcmp(argv[1], "notmuch")) { 1929 int mode = getconnmode(); 1930 1931 if (my_want_state_is_will(TELOPT_LINEMODE)) { 1932 printf("Operating with LINEMODE option\r\n"); 1933 printf("%s line editing\r\n", (mode&MODE_EDIT) ? "Local" : "No"); 1934 printf("%s catching of signals\r\n", 1935 (mode&MODE_TRAPSIG) ? "Local" : "No"); 1936 slcstate(); 1937 #ifdef KLUDGELINEMODE 1938 } else if (kludgelinemode && my_want_state_is_dont(TELOPT_SGA)) { 1939 printf("Operating in obsolete linemode\r\n"); 1940 #endif 1941 } else { 1942 printf("Operating in single character mode\r\n"); 1943 if (localchars) 1944 printf("Catching signals locally\r\n"); 1945 } 1946 printf("%s character echo\r\n", (mode&MODE_ECHO) ? "Local" : "Remote"); 1947 if (my_want_state_is_will(TELOPT_LFLOW)) 1948 printf("%s flow control\r\n", (mode&MODE_FLOW) ? "Local" : "No"); 1949 #if defined(ENCRYPTION) 1950 encrypt_display(); 1951 #endif 1952 } 1953 } else { 1954 printf("No connection.\r\n"); 1955 } 1956 printf("Escape character is '%s'.\r\n", control(escape)); 1957 fflush(stdout); 1958 return 1; 1959 } 1960 1961 #ifdef SIGINFO 1962 /* 1963 * Function that gets called when SIGINFO is received. 1964 */ 1965 RETSIGTYPE 1966 ayt_status(int ignore) 1967 { 1968 call(status, "status", "notmuch", 0); 1969 } 1970 #endif 1971 1972 static Command *getcmd(char *name); 1973 1974 static void 1975 cmdrc(char *m1, char *m2) 1976 { 1977 static char rcname[128]; 1978 Command *c; 1979 FILE *rcfile; 1980 int gotmachine = 0; 1981 int l1 = strlen(m1); 1982 int l2 = strlen(m2); 1983 char m1save[64]; 1984 1985 if (skiprc) 1986 return; 1987 1988 strlcpy(m1save, m1, sizeof(m1save)); 1989 m1 = m1save; 1990 1991 if (rcname[0] == 0) { 1992 char *home = getenv("HOME"); 1993 1994 snprintf (rcname, sizeof(rcname), "%s/.telnetrc", 1995 home ? home : ""); 1996 } 1997 1998 if ((rcfile = fopen(rcname, "r")) == 0) { 1999 return; 2000 } 2001 2002 for (;;) { 2003 if (fgets(line, sizeof(line), rcfile) == NULL) 2004 break; 2005 if (line[0] == 0) 2006 break; 2007 if (line[0] == '#') 2008 continue; 2009 if (gotmachine) { 2010 if (!isspace((unsigned char)line[0])) 2011 gotmachine = 0; 2012 } 2013 if (gotmachine == 0) { 2014 if (isspace((unsigned char)line[0])) 2015 continue; 2016 if (strncasecmp(line, m1, l1) == 0) 2017 strncpy(line, &line[l1], sizeof(line) - l1); 2018 else if (strncasecmp(line, m2, l2) == 0) 2019 strncpy(line, &line[l2], sizeof(line) - l2); 2020 else if (strncasecmp(line, "DEFAULT", 7) == 0) 2021 strncpy(line, &line[7], sizeof(line) - 7); 2022 else 2023 continue; 2024 if (line[0] != ' ' && line[0] != '\t' && line[0] != '\n') 2025 continue; 2026 gotmachine = 1; 2027 } 2028 makeargv(); 2029 if (margv[0] == 0) 2030 continue; 2031 c = getcmd(margv[0]); 2032 if (Ambiguous(c)) { 2033 printf("?Ambiguous command: %s\r\n", margv[0]); 2034 continue; 2035 } 2036 if (c == 0) { 2037 printf("?Invalid command: %s\r\n", margv[0]); 2038 continue; 2039 } 2040 /* 2041 * This should never happen... 2042 */ 2043 if (c->needconnect && !connected) { 2044 printf("?Need to be connected first for %s.\r\n", margv[0]); 2045 continue; 2046 } 2047 (*c->handler)(margc, margv); 2048 } 2049 fclose(rcfile); 2050 } 2051 2052 int 2053 tn(int argc, char **argv) 2054 { 2055 struct servent *sp = 0; 2056 char *cmd, *hostp = 0, *portp = 0; 2057 char *user = 0; 2058 int port = 0; 2059 2060 /* clear the socket address prior to use */ 2061 2062 if (connected) { 2063 printf("?Already connected to %s\r\n", hostname); 2064 return 0; 2065 } 2066 if (argc < 2) { 2067 strlcpy(line, "open ", sizeof(line)); 2068 printf("(to) "); 2069 fgets(&line[strlen(line)], sizeof(line) - strlen(line), stdin); 2070 makeargv(); 2071 argc = margc; 2072 argv = margv; 2073 } 2074 cmd = *argv; 2075 --argc; ++argv; 2076 while (argc) { 2077 if (strcmp(*argv, "help") == 0 || isprefix(*argv, "?")) 2078 goto usage; 2079 if (strcmp(*argv, "-l") == 0) { 2080 --argc; ++argv; 2081 if (argc == 0) 2082 goto usage; 2083 user = strdup(*argv++); 2084 --argc; 2085 continue; 2086 } 2087 if (strcmp(*argv, "-a") == 0) { 2088 --argc; ++argv; 2089 autologin = 1; 2090 continue; 2091 } 2092 if (hostp == 0) { 2093 hostp = *argv++; 2094 --argc; 2095 continue; 2096 } 2097 if (portp == 0) { 2098 portp = *argv++; 2099 --argc; 2100 continue; 2101 } 2102 usage: 2103 printf("usage: %s [-l user] [-a] host-name [port]\r\n", cmd); 2104 return 0; 2105 } 2106 if (hostp == 0) 2107 goto usage; 2108 2109 strlcpy (_hostname, hostp, sizeof(_hostname)); 2110 hostp = _hostname; 2111 if (hostp[0] == '@' || hostp[0] == '!') { 2112 char *p; 2113 hostname = NULL; 2114 for (p = hostp + 1; *p; p++) { 2115 if (*p == ',' || *p == '@') 2116 hostname = p; 2117 } 2118 if (hostname == NULL) { 2119 fprintf(stderr, "%s: bad source route specification\n", hostp); 2120 return 0; 2121 } 2122 *hostname++ = '\0'; 2123 } else 2124 hostname = hostp; 2125 2126 if (portp) { 2127 if (*portp == '-') { 2128 portp++; 2129 telnetport = 1; 2130 } else 2131 telnetport = 0; 2132 port = atoi(portp); 2133 if (port == 0) { 2134 sp = roken_getservbyname(portp, "tcp"); 2135 if (sp) 2136 port = sp->s_port; 2137 else { 2138 printf("%s: bad port number\r\n", portp); 2139 return 0; 2140 } 2141 } else { 2142 port = htons(port); 2143 } 2144 } else { 2145 if (sp == 0) { 2146 sp = roken_getservbyname("telnet", "tcp"); 2147 if (sp == 0) { 2148 fprintf(stderr, "telnet: tcp/telnet: unknown service\r\n"); 2149 return 0; 2150 } 2151 port = sp->s_port; 2152 } 2153 telnetport = 1; 2154 } 2155 2156 { 2157 struct addrinfo *ai, *a, hints; 2158 int error; 2159 char portstr[NI_MAXSERV]; 2160 2161 memset (&hints, 0, sizeof(hints)); 2162 hints.ai_socktype = SOCK_STREAM; 2163 hints.ai_protocol = IPPROTO_TCP; 2164 hints.ai_flags = AI_CANONNAME; 2165 2166 snprintf (portstr, sizeof(portstr), "%u", ntohs(port)); 2167 2168 error = getaddrinfo (hostname, portstr, &hints, &ai); 2169 if (error) { 2170 fprintf (stderr, "%s: %s\r\n", hostname, gai_strerror (error)); 2171 return 0; 2172 } 2173 2174 for (a = ai; a != NULL && connected == 0; a = a->ai_next) { 2175 char addrstr[256]; 2176 2177 if (a->ai_canonname != NULL) 2178 strlcpy (_hostname, a->ai_canonname, sizeof(_hostname)); 2179 2180 if (getnameinfo (a->ai_addr, a->ai_addrlen, 2181 addrstr, sizeof(addrstr), 2182 NULL, 0, NI_NUMERICHOST) != 0) 2183 strlcpy (addrstr, "unknown address", sizeof(addrstr)); 2184 2185 printf("Trying %s...\r\n", addrstr); 2186 2187 net = socket (a->ai_family, a->ai_socktype, a->ai_protocol); 2188 if (net < 0) { 2189 warn ("socket"); 2190 continue; 2191 } 2192 2193 #if defined(IP_OPTIONS) && defined(IPPROTO_IP) && defined(HAVE_SETSOCKOPT) 2194 if (hostp[0] == '@' || hostp[0] == '!') { 2195 char *srp = 0; 2196 int srlen; 2197 int proto, opt; 2198 2199 if ((srlen = sourceroute(a, hostp, &srp, &proto, &opt)) < 0) { 2200 (void) NetClose(net); 2201 net = -1; 2202 continue; 2203 } 2204 if (srp && setsockopt(net, proto, opt, srp, srlen) < 0) 2205 perror("setsockopt (source route)"); 2206 } 2207 #endif 2208 2209 #if defined(IPPROTO_IP) && defined(IP_TOS) 2210 if (a->ai_family == AF_INET) { 2211 # if defined(HAVE_GETTOSBYNAME) 2212 struct tosent *tp; 2213 if (tos < 0 && (tp = gettosbyname("telnet", "tcp"))) 2214 tos = tp->t_tos; 2215 # endif 2216 if (tos < 0) 2217 tos = 020; /* Low Delay bit */ 2218 if (tos 2219 && (setsockopt(net, IPPROTO_IP, IP_TOS, 2220 (void *)&tos, sizeof(int)) < 0) 2221 && (errno != ENOPROTOOPT)) 2222 perror("telnet: setsockopt (IP_TOS) (ignored)"); 2223 } 2224 #endif /* defined(IPPROTO_IP) && defined(IP_TOS) */ 2225 if (debug && SetSockOpt(net, SOL_SOCKET, SO_DEBUG, 1) < 0) { 2226 perror("setsockopt (SO_DEBUG)"); 2227 } 2228 2229 if (connect (net, a->ai_addr, a->ai_addrlen) < 0) { 2230 fprintf (stderr, "telnet: connect to address %s: %s\n", 2231 addrstr, strerror(errno)); 2232 NetClose(net); 2233 if (a->ai_next != NULL) { 2234 continue; 2235 } else { 2236 freeaddrinfo (ai); 2237 return 0; 2238 } 2239 } 2240 ++connected; 2241 #if defined(AUTHENTICATION) || defined(ENCRYPTION) 2242 auth_encrypt_connect(connected); 2243 #endif 2244 } 2245 freeaddrinfo (ai); 2246 if (connected == 0) 2247 return 0; 2248 } 2249 cmdrc(hostp, hostname); 2250 set_forward_options(); 2251 if (autologin && user == NULL) 2252 user = (char *)get_default_username (); 2253 if (user) { 2254 env_define((unsigned char *)"USER", (unsigned char *)user); 2255 env_export((unsigned char *)"USER"); 2256 } 2257 call(status, "status", "notmuch", 0); 2258 if (setjmp(peerdied) == 0) 2259 my_telnet((char *)user); 2260 NetClose(net); 2261 ExitString("Connection closed by foreign host.\r\n",1); 2262 /*NOTREACHED*/ 2263 return 0; 2264 } 2265 2266 #define HELPINDENT ((int)sizeof ("connect")) 2267 2268 static char 2269 openhelp[] = "connect to a site", 2270 closehelp[] = "close current connection", 2271 logouthelp[] = "forcibly logout remote user and close the connection", 2272 quithelp[] = "exit telnet", 2273 statushelp[] = "print status information", 2274 helphelp[] = "print help information", 2275 sendhelp[] = "transmit special characters ('send ?' for more)", 2276 sethelp[] = "set operating parameters ('set ?' for more)", 2277 unsethelp[] = "unset operating parameters ('unset ?' for more)", 2278 togglestring[] ="toggle operating parameters ('toggle ?' for more)", 2279 slchelp[] = "change state of special charaters ('slc ?' for more)", 2280 displayhelp[] = "display operating parameters", 2281 #if defined(AUTHENTICATION) 2282 authhelp[] = "turn on (off) authentication ('auth ?' for more)", 2283 #endif 2284 #if defined(ENCRYPTION) 2285 encrypthelp[] = "turn on (off) encryption ('encrypt ?' for more)", 2286 #endif 2287 zhelp[] = "suspend telnet", 2288 shellhelp[] = "invoke a subshell", 2289 envhelp[] = "change environment variables ('environ ?' for more)", 2290 modestring[] = "try to enter line or character mode ('mode ?' for more)"; 2291 2292 static int help(int argc, char **argv); 2293 2294 static Command cmdtab[] = { 2295 { "close", closehelp, bye, 1 }, 2296 { "logout", logouthelp, logout, 1 }, 2297 { "display", displayhelp, display, 0 }, 2298 { "mode", modestring, modecmd, 0 }, 2299 { "open", openhelp, tn, 0 }, 2300 { "quit", quithelp, quit, 0 }, 2301 { "send", sendhelp, sendcmd, 0 }, 2302 { "set", sethelp, setcmd, 0 }, 2303 { "unset", unsethelp, unsetcmd, 0 }, 2304 { "status", statushelp, status, 0 }, 2305 { "toggle", togglestring, toggle, 0 }, 2306 { "slc", slchelp, slccmd, 0 }, 2307 #if defined(AUTHENTICATION) 2308 { "auth", authhelp, auth_cmd, 0 }, 2309 #endif 2310 #if defined(ENCRYPTION) 2311 { "encrypt", encrypthelp, encrypt_cmd, 0 }, 2312 #endif 2313 { "z", zhelp, telnetsuspend, 0 }, 2314 { "!", shellhelp, shell, 0 }, 2315 { "environ", envhelp, env_cmd, 0 }, 2316 { "?", helphelp, help, 0 }, 2317 { 0, 0, 0, 0 } 2318 }; 2319 2320 static char crmodhelp[] = "deprecated command -- use 'toggle crmod' instead"; 2321 static char escapehelp[] = "deprecated command -- use 'set escape' instead"; 2322 2323 static Command cmdtab2[] = { 2324 { "help", 0, help, 0 }, 2325 { "escape", escapehelp, setescape, 0 }, 2326 { "crmod", crmodhelp, togcrmod, 0 }, 2327 { 0, 0, 0, 0 } 2328 }; 2329 2330 2331 /* 2332 * Call routine with argc, argv set from args (terminated by 0). 2333 */ 2334 2335 static int 2336 call(intrtn_t routine, ...) 2337 { 2338 va_list ap; 2339 char *args[100]; 2340 int argno = 0; 2341 2342 va_start(ap, routine); 2343 while ((args[argno++] = va_arg(ap, char *)) != 0); 2344 va_end(ap); 2345 return (*routine)(argno-1, args); 2346 } 2347 2348 2349 static Command 2350 *getcmd(char *name) 2351 { 2352 Command *cm; 2353 2354 if ((cm = (Command *) genget(name, (char **) cmdtab, sizeof(Command)))) 2355 return cm; 2356 return (Command *) genget(name, (char **) cmdtab2, sizeof(Command)); 2357 } 2358 2359 void 2360 command(int top, char *tbuf, int cnt) 2361 { 2362 Command *c; 2363 2364 setcommandmode(); 2365 if (!top) { 2366 putchar('\n'); 2367 } else { 2368 signal(SIGINT, SIG_DFL); 2369 signal(SIGQUIT, SIG_DFL); 2370 } 2371 for (;;) { 2372 if (rlogin == _POSIX_VDISABLE) 2373 printf("%s> ", prompt); 2374 if (tbuf) { 2375 char *cp; 2376 cp = line; 2377 while (cnt > 0 && (*cp++ = *tbuf++) != '\n') 2378 cnt--; 2379 tbuf = 0; 2380 if (cp == line || *--cp != '\n' || cp == line) 2381 goto getline; 2382 *cp = '\0'; 2383 if (rlogin == _POSIX_VDISABLE) 2384 printf("%s\r\n", line); 2385 } else { 2386 getline: 2387 if (rlogin != _POSIX_VDISABLE) 2388 printf("%s> ", prompt); 2389 if (fgets(line, sizeof(line), stdin) == NULL) { 2390 if (feof(stdin) || ferror(stdin)) { 2391 quit(); 2392 /*NOTREACHED*/ 2393 } 2394 break; 2395 } 2396 } 2397 if (line[0] == 0) 2398 break; 2399 makeargv(); 2400 if (margv[0] == 0) { 2401 break; 2402 } 2403 c = getcmd(margv[0]); 2404 if (Ambiguous(c)) { 2405 printf("?Ambiguous command\r\n"); 2406 continue; 2407 } 2408 if (c == 0) { 2409 printf("?Invalid command\r\n"); 2410 continue; 2411 } 2412 if (c->needconnect && !connected) { 2413 printf("?Need to be connected first.\r\n"); 2414 continue; 2415 } 2416 if ((*c->handler)(margc, margv)) { 2417 break; 2418 } 2419 } 2420 if (!top) { 2421 if (!connected) { 2422 longjmp(toplevel, 1); 2423 /*NOTREACHED*/ 2424 } 2425 setconnmode(0); 2426 } 2427 } 2428 2429 /* 2430 * Help command. 2431 */ 2432 static int 2433 help(int argc, char **argv) 2434 { 2435 Command *c; 2436 2437 if (argc == 1) { 2438 printf("Commands may be abbreviated. Commands are:\r\n\r\n"); 2439 for (c = cmdtab; c->name; c++) 2440 if (c->help) { 2441 printf("%-*s\t%s\r\n", HELPINDENT, c->name, 2442 c->help); 2443 } 2444 return 0; 2445 } 2446 while (--argc > 0) { 2447 char *arg; 2448 arg = *++argv; 2449 c = getcmd(arg); 2450 if (Ambiguous(c)) 2451 printf("?Ambiguous help command %s\r\n", arg); 2452 else if (c == (Command *)0) 2453 printf("?Invalid help command %s\r\n", arg); 2454 else 2455 printf("%s\r\n", c->help); 2456 } 2457 return 0; 2458 } 2459 2460 2461 #if defined(IP_OPTIONS) && defined(IPPROTO_IP) 2462 2463 /* 2464 * Source route is handed in as 2465 * [!]@hop1@hop2...@dst 2466 * 2467 * If the leading ! is present, it is a strict source route, otherwise it is 2468 * assmed to be a loose source route. Note that leading ! is effective 2469 * only for IPv4 case. 2470 * 2471 * We fill in the source route option as 2472 * hop1,hop2,hop3...dest 2473 * and return a pointer to hop1, which will 2474 * be the address to connect() to. 2475 * 2476 * Arguments: 2477 * ai: The address (by struct addrinfo) for the final destination. 2478 * 2479 * arg: Pointer to route list to decipher 2480 * 2481 * cpp: Pointer to a pointer, so that sourceroute() can return 2482 * the address of result buffer (statically alloc'ed). 2483 * 2484 * protop/optp: 2485 * Pointer to an integer. The pointed variable 2486 * lenp: pointer to an integer that contains the 2487 * length of *cpp if *cpp != NULL. 2488 * 2489 * Return values: 2490 * 2491 * Returns the length of the option pointed to by *cpp. If the 2492 * return value is -1, there was a syntax error in the 2493 * option, either arg contained unknown characters or too many hosts, 2494 * or hostname cannot be resolved. 2495 * 2496 * The caller needs to pass return value (len), *cpp, *protop and *optp 2497 * to setsockopt(2). 2498 * 2499 * *cpp: Points to the result buffer. The region is statically 2500 * allocated by the function. 2501 * 2502 * *protop: 2503 * protocol # to be passed to setsockopt(2). 2504 * 2505 * *optp: option # to be passed to setsockopt(2). 2506 * 2507 */ 2508 int 2509 sourceroute(struct addrinfo *ai, 2510 char *arg, 2511 char **cpp, 2512 int *protop, 2513 int *optp) 2514 { 2515 char *cp, *cp2, *lsrp = NULL, *lsrep = NULL; 2516 struct addrinfo hints, *res; 2517 int len, error; 2518 struct sockaddr_in *sin; 2519 register char c; 2520 static char lsr[44]; 2521 #ifdef INET6 2522 struct cmsghdr *cmsg = NULL; 2523 struct sockaddr_in6 *sin6; 2524 static char rhbuf[1024]; 2525 #endif 2526 2527 /* 2528 * Verify the arguments. 2529 */ 2530 if (cpp == NULL) 2531 return -1; 2532 2533 cp = arg; 2534 2535 *cpp = NULL; 2536 switch (ai->ai_family) { 2537 case AF_INET: 2538 lsrp = lsr; 2539 lsrep = lsrp + sizeof(lsr); 2540 2541 /* 2542 * Next, decide whether we have a loose source 2543 * route or a strict source route, and fill in 2544 * the begining of the option. 2545 */ 2546 if (*cp == '!') { 2547 cp++; 2548 *lsrp++ = IPOPT_SSRR; 2549 } else 2550 *lsrp++ = IPOPT_LSRR; 2551 if (*cp != '@') 2552 return -1; 2553 lsrp++; /* skip over length, we'll fill it in later */ 2554 *lsrp++ = 4; 2555 cp++; 2556 *protop = IPPROTO_IP; 2557 *optp = IP_OPTIONS; 2558 break; 2559 #ifdef INET6 2560 case AF_INET6: 2561 /* this needs to be updated for rfc2292bis */ 2562 #ifdef IPV6_PKTOPTIONS 2563 cmsg = inet6_rthdr_init(rhbuf, IPV6_RTHDR_TYPE_0); 2564 if (*cp != '@') 2565 return -1; 2566 cp++; 2567 *protop = IPPROTO_IPV6; 2568 *optp = IPV6_PKTOPTIONS; 2569 break; 2570 #else 2571 return -1; 2572 #endif 2573 #endif 2574 default: 2575 return -1; 2576 } 2577 2578 memset(&hints, 0, sizeof(hints)); 2579 hints.ai_family = ai->ai_family; 2580 hints.ai_socktype = SOCK_STREAM; 2581 2582 for (c = 0;;) { 2583 if (c == ':') 2584 cp2 = 0; 2585 else for (cp2 = cp; (c = *cp2) != '\0'; cp2++) { 2586 if (c == ',') { 2587 *cp2++ = '\0'; 2588 if (*cp2 == '@') 2589 cp2++; 2590 } else if (c == '@') { 2591 *cp2++ = '\0'; 2592 } 2593 #if 0 /*colon conflicts with IPv6 address*/ 2594 else if (c == ':') { 2595 *cp2++ = '\0'; 2596 } 2597 #endif 2598 else 2599 continue; 2600 break; 2601 } 2602 if (!c) 2603 cp2 = 0; 2604 2605 error = getaddrinfo(cp, NULL, &hints, &res); 2606 if (error) { 2607 fprintf(stderr, "%s: %s\n", cp, gai_strerror(error)); 2608 return -1; 2609 } 2610 if (ai->ai_family != res->ai_family) { 2611 freeaddrinfo(res); 2612 return -1; 2613 } 2614 if (ai->ai_family == AF_INET) { 2615 /* 2616 * Check to make sure there is space for address 2617 */ 2618 if (lsrp + 4 > lsrep) { 2619 freeaddrinfo(res); 2620 return -1; 2621 } 2622 sin = (struct sockaddr_in *)res->ai_addr; 2623 memcpy(lsrp, &sin->sin_addr, sizeof(struct in_addr)); 2624 lsrp += sizeof(struct in_addr); 2625 } 2626 #ifdef INET6 2627 else if (ai->ai_family == AF_INET6) { 2628 sin6 = (struct sockaddr_in6 *)res->ai_addr; 2629 inet6_rthdr_add(cmsg, &sin6->sin6_addr, 2630 IPV6_RTHDR_LOOSE); 2631 } 2632 #endif 2633 else { 2634 freeaddrinfo(res); 2635 return -1; 2636 } 2637 freeaddrinfo(res); 2638 if (cp2) 2639 cp = cp2; 2640 else 2641 break; 2642 } 2643 if (ai->ai_family == AF_INET) { 2644 /* record the last hop */ 2645 if (lsrp + 4 > lsrep) 2646 return -1; 2647 sin = (struct sockaddr_in *)ai->ai_addr; 2648 memcpy(lsrp, &sin->sin_addr, sizeof(struct in_addr)); 2649 lsrp += sizeof(struct in_addr); 2650 #ifndef sysV88 2651 lsr[IPOPT_OLEN] = lsrp - lsr; 2652 if (lsr[IPOPT_OLEN] <= 7 || lsr[IPOPT_OLEN] > 40) 2653 return -1; 2654 *lsrp++ = IPOPT_NOP; /*32bit word align*/ 2655 len = lsrp - lsr; 2656 *cpp = lsr; 2657 #else 2658 ipopt.io_len = lsrp - lsr; 2659 if (ipopt.io_len <= 5) /*is 3 better?*/ 2660 return -1; 2661 *cpp = (char 8)&ipopt; 2662 #endif 2663 } 2664 #ifdef INET6 2665 else if (ai->ai_family == AF_INET6) { 2666 inet6_rthdr_lasthop(cmsg, IPV6_RTHDR_LOOSE); 2667 len = cmsg->cmsg_len; 2668 *cpp = rhbuf; 2669 } 2670 #endif 2671 else 2672 return -1; 2673 return len; 2674 } 2675 #endif 2676