1 /* $NetBSD: commands.c,v 1.68 2012/01/09 16:08:55 christos Exp $ */ 2 3 /* 4 * Copyright (C) 1997 and 1998 WIDE Project. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the project nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 /* 33 * Copyright (c) 1988, 1990, 1993 34 * The Regents of the University of California. All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 3. Neither the name of the University nor the names of its contributors 45 * may be used to endorse or promote products derived from this software 46 * without specific prior written permission. 47 * 48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 58 * SUCH DAMAGE. 59 */ 60 61 #include <sys/cdefs.h> 62 #ifndef lint 63 #if 0 64 static char sccsid[] = "@(#)commands.c 8.4 (Berkeley) 5/30/95"; 65 #else 66 __RCSID("$NetBSD: commands.c,v 1.68 2012/01/09 16:08:55 christos Exp $"); 67 #endif 68 #endif /* not lint */ 69 70 #include <sys/param.h> 71 #include <sys/file.h> 72 #include <sys/wait.h> 73 #include <sys/socket.h> 74 #include <netinet/in.h> 75 #include <arpa/inet.h> 76 77 #include <ctype.h> 78 #include <errno.h> 79 #include <netdb.h> 80 #include <pwd.h> 81 #include <signal.h> 82 #include <stdarg.h> 83 #include <unistd.h> 84 85 #include <arpa/telnet.h> 86 87 #include "general.h" 88 #include "ring.h" 89 #include "externs.h" 90 #include "defines.h" 91 #include "types.h" 92 #include <libtelnet/misc.h> 93 #ifdef AUTHENTICATION 94 #include <libtelnet/auth.h> 95 #endif 96 #ifdef ENCRYPTION 97 #include <libtelnet/encrypt.h> 98 #endif 99 100 #include <netinet/in_systm.h> 101 #include <netinet/ip.h> 102 103 104 #if defined(IPPROTO_IP) && defined(IP_TOS) 105 int tos = -1; 106 #endif /* defined(IPPROTO_IP) && defined(IP_TOS) */ 107 108 char *hostname; 109 static char _hostname[MAXHOSTNAMELEN]; 110 111 typedef struct { 112 const char *name; /* command name */ 113 const char *help; /* help string (NULL for no help) */ 114 int (*handler) /* routine which executes command */ 115 (int, char *[]); 116 int needconnect; /* Do we need to be connected to execute? */ 117 } Command; 118 119 static char line[256]; 120 static char saveline[256]; 121 static int margc; 122 static char *margv[20]; 123 124 static void makeargv(void); 125 static int special(char *); 126 static const char *control(cc_t); 127 static int sendcmd(int, char **); 128 static int send_esc(char *); 129 static int send_docmd(char *); 130 static int send_dontcmd(char *); 131 static int send_willcmd(char *); 132 static int send_wontcmd(char *); 133 static int send_help(char *); 134 static int lclchars(int); 135 static int togdebug(int); 136 static int togcrlf(int); 137 static int togbinary(int); 138 static int togrbinary(int); 139 static int togxbinary(int); 140 static int togglehelp(int); 141 static void settogglehelp(int); 142 static int toggle(int, char *[]); 143 static struct setlist *getset(char *); 144 static int setcmd(int, char *[]); 145 static int unsetcmd(int, char *[]); 146 static int dokludgemode(int); 147 static int dolinemode(int); 148 static int docharmode(int); 149 static int dolmmode(int, int ); 150 static int modecmd(int, char *[]); 151 static int display(int, char *[]); 152 static int setescape(int, char *[]); 153 static int togcrmod(int, char *[]); 154 static int bye(int, char *[]); 155 static void slc_help(int); 156 static struct slclist *getslc(char *); 157 static int slccmd(int, char *[]); 158 static struct env_lst *env_help(const unsigned char *, unsigned char *); 159 static struct envlist *getenvcmd(char *); 160 #ifdef AUTHENTICATION 161 static int auth_help(char *); 162 #endif 163 #ifdef TN3270 164 static void filestuff(int); 165 #endif 166 static int status(int, char *[]); 167 static const char *sockaddr_ntop (struct sockaddr *); 168 typedef int (*intrtn_t)(int, char **); 169 static int call(intrtn_t, ...); 170 static Command *getcmd(char *); 171 static int help(int, char *[]); 172 173 static void 174 makeargv(void) 175 { 176 char *cp, *cp2, c; 177 char **argp = margv; 178 static char bang[] = "!"; 179 180 margc = 0; 181 cp = line; 182 if (*cp == '!') { /* Special case shell escape */ 183 strlcpy(saveline, line, sizeof(saveline)); /* save for shell command */ 184 *argp++ = bang; /* No room in string to get this */ 185 margc++; 186 cp++; 187 } 188 while ((c = *cp) != '\0') { 189 int inquote = 0; 190 while (isspace((unsigned char)c)) 191 c = *++cp; 192 if (c == '\0') 193 break; 194 *argp++ = cp; 195 margc += 1; 196 for (cp2 = cp; c != '\0'; c = *++cp) { 197 if (inquote) { 198 if (c == inquote) { 199 inquote = 0; 200 continue; 201 } 202 } else { 203 if (c == '\\') { 204 if ((c = *++cp) == '\0') 205 break; 206 } else if (c == '"') { 207 inquote = '"'; 208 continue; 209 } else if (c == '\'') { 210 inquote = '\''; 211 continue; 212 } else if (isspace((unsigned char)c)) 213 break; 214 } 215 *cp2++ = c; 216 } 217 *cp2 = '\0'; 218 if (c == '\0') 219 break; 220 cp++; 221 } 222 *argp++ = 0; 223 } 224 225 /* 226 * Make a character string into a number. 227 * 228 * Todo: 1. Could take random integers (12, 0x12, 012, 0b1). 229 */ 230 231 static int 232 special(char *s) 233 { 234 char c; 235 char b; 236 237 switch (*s) { 238 case '^': 239 b = *++s; 240 if (b == '?') { 241 c = b | 0x40; /* DEL */ 242 } else { 243 c = b & 0x1f; 244 } 245 break; 246 default: 247 c = *s; 248 break; 249 } 250 return c; 251 } 252 253 /* 254 * Construct a control character sequence 255 * for a special character. 256 */ 257 static const char * 258 control(cc_t c) 259 { 260 static char buf[5]; 261 /* 262 * The only way I could get the Sun 3.5 compiler 263 * to shut up about 264 * if ((unsigned int)c >= 0x80) 265 * was to assign "c" to an unsigned int variable... 266 * Arggg.... 267 */ 268 unsigned int uic = (unsigned int)c; 269 270 if (uic == 0x7f) 271 return ("^?"); 272 if (c == (cc_t)_POSIX_VDISABLE) { 273 return "off"; 274 } 275 if (uic >= 0x80) { 276 buf[0] = '\\'; 277 buf[1] = ((c>>6)&07) + '0'; 278 buf[2] = ((c>>3)&07) + '0'; 279 buf[3] = (c&07) + '0'; 280 buf[4] = 0; 281 } else if (uic >= 0x20) { 282 buf[0] = c; 283 buf[1] = 0; 284 } else { 285 buf[0] = '^'; 286 buf[1] = '@'+c; 287 buf[2] = 0; 288 } 289 return (buf); 290 } 291 292 293 294 /* 295 * The following are data structures and routines for 296 * the "send" command. 297 * 298 */ 299 300 struct sendlist { 301 const char *name; /* How user refers to it (case independent) */ 302 const char *help; /* Help information (0 ==> no help) */ 303 int needconnect; /* Need to be connected */ 304 int narg; /* Number of arguments */ 305 int (*handler) /* Routine to perform (for special ops) */ 306 (char *); 307 int nbyte; /* Number of bytes to send this command */ 308 int what; /* Character to be sent (<0 ==> special) */ 309 }; 310 311 312 static struct sendlist Sendlist[] = { 313 { "ao", "Send Telnet Abort output", 1, 0, 0, 2, AO }, 314 { "ayt", "Send Telnet 'Are You There'", 1, 0, 0, 2, AYT }, 315 { "brk", "Send Telnet Break", 1, 0, 0, 2, BREAK }, 316 { "break", 0, 1, 0, 0, 2, BREAK }, 317 { "ec", "Send Telnet Erase Character", 1, 0, 0, 2, EC }, 318 { "el", "Send Telnet Erase Line", 1, 0, 0, 2, EL }, 319 { "escape", "Send current escape character", 1, 0, send_esc, 1, 0 }, 320 { "ga", "Send Telnet 'Go Ahead' sequence", 1, 0, 0, 2, GA }, 321 { "ip", "Send Telnet Interrupt Process", 1, 0, 0, 2, IP }, 322 { "intp", 0, 1, 0, 0, 2, IP }, 323 { "interrupt", 0, 1, 0, 0, 2, IP }, 324 { "intr", 0, 1, 0, 0, 2, IP }, 325 { "nop", "Send Telnet 'No operation'", 1, 0, 0, 2, NOP }, 326 { "eor", "Send Telnet 'End of Record'", 1, 0, 0, 2, EOR }, 327 { "abort", "Send Telnet 'Abort Process'", 1, 0, 0, 2, ABORT }, 328 { "susp", "Send Telnet 'Suspend Process'", 1, 0, 0, 2, SUSP }, 329 { "eof", "Send Telnet End of File Character", 1, 0, 0, 2, xEOF }, 330 { "synch", "Perform Telnet 'Synch operation'", 1, 0, dosynch, 2, 0 }, 331 { "getstatus", "Send request for STATUS", 1, 0, get_status, 6, 0 }, 332 { "?", "Display send options", 0, 0, send_help, 0, 0 }, 333 { "help", 0, 0, 0, send_help, 0, 0 }, 334 { "do", 0, 0, 1, send_docmd, 3, 0 }, 335 { "dont", 0, 0, 1, send_dontcmd, 3, 0 }, 336 { "will", 0, 0, 1, send_willcmd, 3, 0 }, 337 { "wont", 0, 0, 1, send_wontcmd, 3, 0 }, 338 { .name = 0 } 339 }; 340 341 #define GETSEND(name) ((struct sendlist *) genget(name, (char **) Sendlist, \ 342 sizeof(struct sendlist))) 343 344 static int 345 sendcmd(int argc, char **argv) 346 { 347 int count; /* how many bytes we are going to need to send */ 348 int i; 349 struct sendlist *s; /* pointer to current command */ 350 int success = 0; 351 int needconnect = 0; 352 353 if (argc < 2) { 354 printf("need at least one argument for 'send' command\n"); 355 printf("'send ?' for help\n"); 356 return 0; 357 } 358 /* 359 * First, validate all the send arguments. 360 * In addition, we see how much space we are going to need, and 361 * whether or not we will be doing a "SYNCH" operation (which 362 * flushes the network queue). 363 */ 364 count = 0; 365 for (i = 1; i < argc; i++) { 366 s = GETSEND(argv[i]); 367 if (s == 0) { 368 printf("Unknown send argument '%s'\n'send ?' for help.\n", 369 argv[i]); 370 return 0; 371 } else if (Ambiguous(s)) { 372 printf("Ambiguous send argument '%s'\n'send ?' for help.\n", 373 argv[i]); 374 return 0; 375 } 376 if (i + s->narg >= argc) { 377 fprintf(stderr, 378 "Need %d argument%s to 'send %s' command. 'send %s ?' for help.\n", 379 s->narg, s->narg == 1 ? "" : "s", s->name, s->name); 380 return 0; 381 } 382 count += s->nbyte; 383 if (s->handler == send_help) { 384 send_help(NULL); 385 return 0; 386 } 387 388 i += s->narg; 389 needconnect += s->needconnect; 390 } 391 if (!connected && needconnect) { 392 printf("?Need to be connected first.\n"); 393 printf("'send ?' for help\n"); 394 return 0; 395 } 396 /* Now, do we have enough room? */ 397 if (NETROOM() < count) { 398 printf("There is not enough room in the buffer TO the network\n"); 399 printf("to process your request. Nothing will be done.\n"); 400 printf("('send synch' will throw away most data in the network\n"); 401 printf("buffer, if this might help.)\n"); 402 return 0; 403 } 404 /* OK, they are all OK, now go through again and actually send */ 405 count = 0; 406 for (i = 1; i < argc; i++) { 407 if ((s = GETSEND(argv[i])) == 0) { 408 fprintf(stderr, "Telnet 'send' error - argument disappeared!\n"); 409 (void) quit(0, NULL); 410 /*NOTREACHED*/ 411 } 412 if (s->handler) { 413 count++; 414 success += (*s->handler)(argv[i+1]); 415 i += s->narg; 416 } else { 417 NET2ADD(IAC, s->what); 418 printoption("SENT", IAC, s->what); 419 } 420 } 421 return (count == success); 422 } 423 424 static int 425 send_esc(char *s) 426 { 427 NETADD(escape); 428 return 1; 429 } 430 431 static int 432 send_docmd(char *name) 433 { 434 return(send_tncmd(send_do, "do", name)); 435 } 436 437 static int 438 send_dontcmd(char *name) 439 { 440 return(send_tncmd(send_dont, "dont", name)); 441 } 442 static int 443 send_willcmd(char *name) 444 { 445 return(send_tncmd(send_will, "will", name)); 446 } 447 static int 448 send_wontcmd(char *name) 449 { 450 return(send_tncmd(send_wont, "wont", name)); 451 } 452 453 int 454 send_tncmd(void (*func)(int, int), const char *cmd, char *name) 455 { 456 const char **cpp; 457 int val = 0; 458 459 if (isprefix(name, "?")) { 460 int col, len; 461 462 printf("usage: send %s <value|option>\n", cmd); 463 printf("\"value\" must be from 0 to 255\n"); 464 printf("Valid options are:\n\t"); 465 466 col = 8; 467 for (cpp = telopts; *cpp; cpp++) { 468 len = strlen(*cpp) + 3; 469 if (col + len > 65) { 470 printf("\n\t"); 471 col = 8; 472 } 473 printf(" \"%s\"", *cpp); 474 col += len; 475 } 476 printf("\n"); 477 return 0; 478 } 479 cpp = (void *)genget(name, __UNCONST(telopts), sizeof(char *)); 480 if (Ambiguous(cpp)) { 481 fprintf(stderr,"'%s': ambiguous argument ('send %s ?' for help).\n", 482 name, cmd); 483 return 0; 484 } 485 if (cpp) { 486 val = cpp - telopts; 487 } else { 488 char *cp = name; 489 490 while (*cp >= '0' && *cp <= '9') { 491 val *= 10; 492 val += *cp - '0'; 493 cp++; 494 } 495 if (*cp != 0) { 496 fprintf(stderr, "'%s': unknown argument ('send %s ?' for help).\n", 497 name, cmd); 498 return 0; 499 } else if (val < 0 || val > 255) { 500 fprintf(stderr, "'%s': bad value ('send %s ?' for help).\n", 501 name, cmd); 502 return 0; 503 } 504 } 505 if (!connected) { 506 printf("?Need to be connected first.\n"); 507 return 0; 508 } 509 (*func)(val, 1); 510 return 1; 511 } 512 513 static int 514 send_help(char *n) 515 { 516 struct sendlist *s; /* pointer to current command */ 517 for (s = Sendlist; s->name; s++) { 518 if (s->help) 519 printf("%-15s %s\n", s->name, s->help); 520 } 521 return(0); 522 } 523 524 /* 525 * The following are the routines and data structures referred 526 * to by the arguments to the "toggle" command. 527 */ 528 529 static int 530 lclchars(int n) 531 { 532 donelclchars = 1; 533 return 1; 534 } 535 536 static int 537 togdebug(int n) 538 { 539 if (net > 0 && 540 (SetSockOpt(net, SOL_SOCKET, SO_DEBUG, telnet_debug)) < 0) { 541 perror("setsockopt (SO_DEBUG)"); 542 } 543 return 1; 544 } 545 546 static int 547 togcrlf(int n) 548 { 549 if (crlf) { 550 printf("Will send carriage returns as telnet <CR><LF>.\n"); 551 } else { 552 printf("Will send carriage returns as telnet <CR><NUL>.\n"); 553 } 554 return 1; 555 } 556 557 int binmode; 558 559 static int 560 togbinary(int val) 561 { 562 donebinarytoggle = 1; 563 564 if (val >= 0) { 565 binmode = val; 566 } else { 567 if (my_want_state_is_will(TELOPT_BINARY) && 568 my_want_state_is_do(TELOPT_BINARY)) { 569 binmode = 1; 570 } else if (my_want_state_is_wont(TELOPT_BINARY) && 571 my_want_state_is_dont(TELOPT_BINARY)) { 572 binmode = 0; 573 } 574 val = binmode ? 0 : 1; 575 } 576 577 if (val == 1) { 578 if (my_want_state_is_will(TELOPT_BINARY) && 579 my_want_state_is_do(TELOPT_BINARY)) { 580 printf("Already operating in binary mode with remote host.\n"); 581 } else { 582 printf("Negotiating binary mode with remote host.\n"); 583 tel_enter_binary(3); 584 } 585 } else { 586 if (my_want_state_is_wont(TELOPT_BINARY) && 587 my_want_state_is_dont(TELOPT_BINARY)) { 588 printf("Already in network ascii mode with remote host.\n"); 589 } else { 590 printf("Negotiating network ascii mode with remote host.\n"); 591 tel_leave_binary(3); 592 } 593 } 594 return 1; 595 } 596 597 static int 598 togrbinary(int val) 599 { 600 donebinarytoggle = 1; 601 602 if (val == -1) 603 val = my_want_state_is_do(TELOPT_BINARY) ? 0 : 1; 604 605 if (val == 1) { 606 if (my_want_state_is_do(TELOPT_BINARY)) { 607 printf("Already receiving in binary mode.\n"); 608 } else { 609 printf("Negotiating binary mode on input.\n"); 610 tel_enter_binary(1); 611 } 612 } else { 613 if (my_want_state_is_dont(TELOPT_BINARY)) { 614 printf("Already receiving in network ascii mode.\n"); 615 } else { 616 printf("Negotiating network ascii mode on input.\n"); 617 tel_leave_binary(1); 618 } 619 } 620 return 1; 621 } 622 623 static int 624 togxbinary(int val) 625 { 626 donebinarytoggle = 1; 627 628 if (val == -1) 629 val = my_want_state_is_will(TELOPT_BINARY) ? 0 : 1; 630 631 if (val == 1) { 632 if (my_want_state_is_will(TELOPT_BINARY)) { 633 printf("Already transmitting in binary mode.\n"); 634 } else { 635 printf("Negotiating binary mode on output.\n"); 636 tel_enter_binary(2); 637 } 638 } else { 639 if (my_want_state_is_wont(TELOPT_BINARY)) { 640 printf("Already transmitting in network ascii mode.\n"); 641 } else { 642 printf("Negotiating network ascii mode on output.\n"); 643 tel_leave_binary(2); 644 } 645 } 646 return 1; 647 } 648 649 #ifdef ENCRYPTION 650 extern int EncryptAutoEnc(int); 651 extern int EncryptAutoDec(int); 652 extern int EncryptDebug(int); 653 extern int EncryptVerbose(int); 654 #endif /* ENCRYPTION */ 655 656 struct togglelist { 657 const char *name; /* name of toggle */ 658 const char *help; /* help message */ 659 int (*handler) /* routine to do actual setting */ 660 (int); 661 int *variable; 662 const char *actionexplanation; 663 }; 664 665 static struct togglelist Togglelist[] = { 666 { "autoflush", 667 "flushing of output when sending interrupt characters", 668 0, 669 &autoflush, 670 "flush output when sending interrupt characters" }, 671 { "autosynch", 672 "automatic sending of interrupt characters in urgent mode", 673 0, 674 &autosynch, 675 "send interrupt characters in urgent mode" }, 676 #ifdef AUTHENTICATION 677 { "autologin", 678 "automatic sending of login and/or authentication info", 679 0, 680 &autologin, 681 "send login name and/or authentication information" }, 682 { "authdebug", 683 "Toggle authentication debugging", 684 auth_togdebug, 685 0, 686 "print authentication debugging information" }, 687 #endif 688 #ifdef ENCRYPTION 689 { "autoencrypt", 690 "automatic encryption of data stream", 691 EncryptAutoEnc, 692 0, 693 "automatically encrypt output" }, 694 { "autodecrypt", 695 "automatic decryption of data stream", 696 EncryptAutoDec, 697 0, 698 "automatically decrypt input" }, 699 { "verbose_encrypt", 700 "Toggle verbose encryption output", 701 EncryptVerbose, 702 0, 703 "print verbose encryption output" }, 704 { "encdebug", 705 "Toggle encryption debugging", 706 EncryptDebug, 707 0, 708 "print encryption debugging information" }, 709 #endif /* ENCRYPTION */ 710 { "skiprc", 711 "don't read ~/.telnetrc file", 712 0, 713 &skiprc, 714 "skip reading of ~/.telnetrc file" }, 715 { "binary", 716 "sending and receiving of binary data", 717 togbinary, 718 0, 719 0 }, 720 { "inbinary", 721 "receiving of binary data", 722 togrbinary, 723 0, 724 0 }, 725 { "outbinary", 726 "sending of binary data", 727 togxbinary, 728 0, 729 0 }, 730 { "crlf", 731 "sending carriage returns as telnet <CR><LF>", 732 togcrlf, 733 &crlf, 734 0 }, 735 { "crmod", 736 "mapping of received carriage returns", 737 0, 738 &crmod, 739 "map carriage return on output" }, 740 { "localchars", 741 "local recognition of certain control characters", 742 lclchars, 743 &localchars, 744 "recognize certain control characters" }, 745 { " ", "", 0, NULL, NULL }, /* empty line */ 746 #ifdef TN3270 747 { "apitrace", 748 "(debugging) toggle tracing of API transactions", 749 0, 750 &apitrace, 751 "trace API transactions" }, 752 { "cursesdata", 753 "(debugging) toggle printing of hexadecimal curses data", 754 0, 755 &cursesdata, 756 "print hexadecimal representation of curses data" }, 757 #endif /* defined(TN3270) */ 758 { "debug", 759 "debugging", 760 togdebug, 761 &telnet_debug, 762 "turn on socket level debugging" }, 763 { "netdata", 764 "printing of hexadecimal network data (debugging)", 765 0, 766 &netdata, 767 "print hexadecimal representation of network traffic" }, 768 { "prettydump", 769 "output of \"netdata\" to user readable format (debugging)", 770 0, 771 &prettydump, 772 "print user readable output for \"netdata\"" }, 773 { "options", 774 "viewing of options processing (debugging)", 775 0, 776 &showoptions, 777 "show option processing" }, 778 { "termdata", 779 "(debugging) toggle printing of hexadecimal terminal data", 780 0, 781 &termdata, 782 "print hexadecimal representation of terminal traffic" }, 783 { "?", 784 0, 785 togglehelp, NULL, NULL }, 786 { "help", 787 0, 788 togglehelp, NULL, NULL }, 789 { .name = 0 } 790 }; 791 792 static int 793 togglehelp(int n) 794 { 795 struct togglelist *c; 796 797 for (c = Togglelist; c->name; c++) { 798 if (c->help) { 799 if (*c->help) 800 printf("%-15s toggle %s\n", c->name, c->help); 801 else 802 printf("\n"); 803 } 804 } 805 printf("\n"); 806 printf("%-15s %s\n", "?", "display help information"); 807 return 0; 808 } 809 810 static void 811 settogglehelp(int set) 812 { 813 struct togglelist *c; 814 815 for (c = Togglelist; c->name; c++) { 816 if (c->help) { 817 if (*c->help) 818 printf("%-15s %s %s\n", c->name, set ? "enable" : "disable", 819 c->help); 820 else 821 printf("\n"); 822 } 823 } 824 } 825 826 #define GETTOGGLE(name) (struct togglelist *) \ 827 genget(name, (char **) Togglelist, sizeof(struct togglelist)) 828 829 static int 830 toggle(int argc, char *argv[]) 831 { 832 int retval = 1; 833 char *name; 834 struct togglelist *c; 835 836 if (argc < 2) { 837 fprintf(stderr, 838 "Need an argument to 'toggle' command. 'toggle ?' for help.\n"); 839 return 0; 840 } 841 argc--; 842 argv++; 843 while (argc--) { 844 name = *argv++; 845 c = GETTOGGLE(name); 846 if (Ambiguous(c)) { 847 fprintf(stderr, "'%s': ambiguous argument ('toggle ?' for help).\n", 848 name); 849 return 0; 850 } else if (c == 0) { 851 fprintf(stderr, "'%s': unknown argument ('toggle ?' for help).\n", 852 name); 853 return 0; 854 } else { 855 if (c->variable) { 856 *c->variable = !*c->variable; /* invert it */ 857 if (c->actionexplanation) { 858 printf("%s %s.\n", *c->variable? "Will" : "Won't", 859 c->actionexplanation); 860 } 861 } 862 if (c->handler) { 863 retval &= (*c->handler)(-1); 864 } 865 } 866 } 867 return retval; 868 } 869 870 /* 871 * The following perform the "set" command. 872 */ 873 874 struct termios new_tc = { .c_iflag = 0 }; 875 876 struct setlist { 877 const char *name; /* name */ 878 const char *help; /* help information */ 879 void (*handler)(char *); 880 cc_t *charp; /* where it is located at */ 881 }; 882 883 static struct setlist Setlist[] = { 884 #ifdef KLUDGELINEMODE 885 { "echo", "character to toggle local echoing on/off", 0, &echoc }, 886 #endif 887 { "escape", "character to escape back to telnet command mode", 0, &escape }, 888 { "rlogin", "rlogin escape character", 0, &rlogin }, 889 { "tracefile", "file to write trace information to", SetNetTrace, (cc_t *)NetTraceFile}, 890 { " ", "", NULL, NULL }, 891 { " ", "The following need 'localchars' to be toggled true", 0, 0 }, 892 { "flushoutput", "character to cause an Abort Output", 0, termFlushCharp }, 893 { "interrupt", "character to cause an Interrupt Process", 0, termIntCharp }, 894 { "quit", "character to cause an Abort process", 0, termQuitCharp }, 895 { "eof", "character to cause an EOF ", 0, termEofCharp }, 896 { " ", "", NULL, NULL }, 897 { " ", "The following are for local editing in linemode", 0, 0 }, 898 { "erase", "character to use to erase a character", 0, termEraseCharp }, 899 { "kill", "character to use to erase a line", 0, termKillCharp }, 900 { "lnext", "character to use for literal next", 0, termLiteralNextCharp }, 901 { "susp", "character to cause a Suspend Process", 0, termSuspCharp }, 902 { "reprint", "character to use for line reprint", 0, termRprntCharp }, 903 { "worderase", "character to use to erase a word", 0, termWerasCharp }, 904 { "start", "character to use for XON", 0, termStartCharp }, 905 { "stop", "character to use for XOFF", 0, termStopCharp }, 906 { "forw1", "alternate end of line character", 0, termForw1Charp }, 907 { "forw2", "alternate end of line character", 0, termForw2Charp }, 908 { "ayt", "alternate AYT character", 0, termAytCharp }, 909 { .name = 0 } 910 }; 911 912 static struct setlist * 913 getset(char *name) 914 { 915 return (struct setlist *) 916 genget(name, (char **) Setlist, sizeof(struct setlist)); 917 } 918 919 void 920 set_escape_char(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(int argc, char *argv[]) 934 { 935 int value; 936 struct setlist *ct; 937 struct togglelist *c; 938 939 if (argc < 2 || argc > 3) { 940 printf("Format is 'set Name Value'\n'set ?' for help.\n"); 941 return 0; 942 } 943 if ((argc == 2) && (isprefix(argv[1], "?") || isprefix(argv[1], "help"))) { 944 for (ct = Setlist; ct->name; ct++) 945 printf("%-15s %s\n", ct->name, ct->help); 946 printf("\n"); 947 settogglehelp(1); 948 printf("%-15s %s\n", "?", "display help information"); 949 return 0; 950 } 951 952 ct = getset(argv[1]); 953 if (ct == 0) { 954 c = GETTOGGLE(argv[1]); 955 if (c == 0) { 956 fprintf(stderr, "'%s': unknown argument ('set ?' for help).\n", 957 argv[1]); 958 return 0; 959 } else if (Ambiguous(c)) { 960 fprintf(stderr, "'%s': ambiguous argument ('set ?' for help).\n", 961 argv[1]); 962 return 0; 963 } 964 if (c->variable) { 965 if ((argc == 2) || (strcmp("on", argv[2]) == 0)) 966 *c->variable = 1; 967 else if (strcmp("off", argv[2]) == 0) 968 *c->variable = 0; 969 else { 970 printf("Format is 'set togglename [on|off]'\n'set ?' for help.\n"); 971 return 0; 972 } 973 if (c->actionexplanation) { 974 printf("%s %s.\n", *c->variable? "Will" : "Won't", 975 c->actionexplanation); 976 } 977 } 978 if (c->handler) 979 (*c->handler)(1); 980 } else if (argc != 3) { 981 printf("Format is 'set Name Value'\n'set ?' for help.\n"); 982 return 0; 983 } else if (Ambiguous(ct)) { 984 fprintf(stderr, "'%s': ambiguous argument ('set ?' for help).\n", 985 argv[1]); 986 return 0; 987 } else if (ct->handler) { 988 (*ct->handler)(argv[2]); 989 printf("%s set to \"%s\".\n", ct->name, (char *)ct->charp); 990 } else { 991 if (strcmp("off", argv[2])) { 992 value = special(argv[2]); 993 } else { 994 value = _POSIX_VDISABLE; 995 } 996 *(ct->charp) = (cc_t)value; 997 printf("%s character is '%s'.\n", ct->name, control(*(ct->charp))); 998 } 999 slc_check(); 1000 return 1; 1001 } 1002 1003 static int 1004 unsetcmd(int argc, char *argv[]) 1005 { 1006 struct setlist *ct; 1007 struct togglelist *c; 1008 char *name; 1009 1010 if (argc < 2) { 1011 fprintf(stderr, 1012 "Need an argument to 'unset' command. 'unset ?' for help.\n"); 1013 return 0; 1014 } 1015 if (isprefix(argv[1], "?") || isprefix(argv[1], "help")) { 1016 for (ct = Setlist; ct->name; ct++) 1017 printf("%-15s %s\n", ct->name, ct->help); 1018 printf("\n"); 1019 settogglehelp(0); 1020 printf("%-15s %s\n", "?", "display help information"); 1021 return 0; 1022 } 1023 1024 argc--; 1025 argv++; 1026 while (argc--) { 1027 name = *argv++; 1028 ct = getset(name); 1029 if (ct == 0) { 1030 c = GETTOGGLE(name); 1031 if (c == 0) { 1032 fprintf(stderr, "'%s': unknown argument ('unset ?' for help).\n", 1033 name); 1034 return 0; 1035 } else if (Ambiguous(c)) { 1036 fprintf(stderr, "'%s': ambiguous argument ('unset ?' for help).\n", 1037 name); 1038 return 0; 1039 } 1040 if (c->variable) { 1041 *c->variable = 0; 1042 if (c->actionexplanation) { 1043 printf("%s %s.\n", *c->variable? "Will" : "Won't", 1044 c->actionexplanation); 1045 } 1046 } 1047 if (c->handler) 1048 (*c->handler)(0); 1049 } else if (Ambiguous(ct)) { 1050 fprintf(stderr, "'%s': ambiguous argument ('unset ?' for help).\n", 1051 name); 1052 return 0; 1053 } else if (ct->handler) { 1054 (*ct->handler)(0); 1055 printf("%s reset to \"%s\".\n", ct->name, (char *)ct->charp); 1056 } else { 1057 *(ct->charp) = _POSIX_VDISABLE; 1058 printf("%s character is '%s'.\n", ct->name, control(*(ct->charp))); 1059 } 1060 } 1061 return 1; 1062 } 1063 1064 /* 1065 * The following are the data structures and routines for the 1066 * 'mode' command. 1067 */ 1068 #ifdef KLUDGELINEMODE 1069 extern int kludgelinemode; 1070 1071 static int 1072 dokludgemode(int n) 1073 { 1074 kludgelinemode = 1; 1075 send_wont(TELOPT_LINEMODE, 1); 1076 send_dont(TELOPT_SGA, 1); 1077 send_dont(TELOPT_ECHO, 1); 1078 return 1; 1079 } 1080 #endif 1081 1082 static int 1083 dolinemode(int n) 1084 { 1085 #ifdef KLUDGELINEMODE 1086 if (kludgelinemode) 1087 send_dont(TELOPT_SGA, 1); 1088 #endif 1089 send_will(TELOPT_LINEMODE, 1); 1090 send_dont(TELOPT_ECHO, 1); 1091 return 1; 1092 } 1093 1094 static int 1095 docharmode(int n) 1096 { 1097 #ifdef KLUDGELINEMODE 1098 if (kludgelinemode) 1099 send_do(TELOPT_SGA, 1); 1100 else 1101 #endif 1102 send_wont(TELOPT_LINEMODE, 1); 1103 send_do(TELOPT_ECHO, 1); 1104 return 1; 1105 } 1106 1107 static int 1108 dolmmode(int bit, int on) 1109 { 1110 unsigned char c; 1111 extern int linemode; 1112 1113 if (my_want_state_is_wont(TELOPT_LINEMODE)) { 1114 printf("?Need to have LINEMODE option enabled first.\n"); 1115 printf("'mode ?' for help.\n"); 1116 return 0; 1117 } 1118 1119 if (on) 1120 c = (linemode | bit); 1121 else 1122 c = (linemode & ~bit); 1123 lm_mode(&c, 1, 1); 1124 return 1; 1125 } 1126 1127 int 1128 set_mode(int bit) 1129 { 1130 return dolmmode(bit, 1); 1131 } 1132 1133 int 1134 clear_mode(int bit) 1135 { 1136 return dolmmode(bit, 0); 1137 } 1138 1139 struct modelist { 1140 const char *name; /* command name */ 1141 const char *help; /* help string */ 1142 int (*handler) /* routine which executes command */ 1143 (int); 1144 int needconnect; /* Do we need to be connected to execute? */ 1145 int arg1; 1146 }; 1147 1148 static struct modelist ModeList[] = { 1149 { "character", "Disable LINEMODE option", docharmode, 1, 0 }, 1150 #ifdef KLUDGELINEMODE 1151 { "", "(or disable obsolete line-by-line mode)", 0, 0, 0 }, 1152 #endif 1153 { "line", "Enable LINEMODE option", dolinemode, 1, 0 }, 1154 #ifdef KLUDGELINEMODE 1155 { "", "(or enable obsolete line-by-line mode)", 0, 0, 0 }, 1156 #endif 1157 { "", "", 0, 0, 0 }, 1158 { "", "These require the LINEMODE option to be enabled", 0, 0, 0 }, 1159 { "isig", "Enable signal trapping", set_mode, 1, MODE_TRAPSIG }, 1160 { "+isig", 0, set_mode, 1, MODE_TRAPSIG }, 1161 { "-isig", "Disable signal trapping", clear_mode, 1, MODE_TRAPSIG }, 1162 { "edit", "Enable character editing", set_mode, 1, MODE_EDIT }, 1163 { "+edit", 0, set_mode, 1, MODE_EDIT }, 1164 { "-edit", "Disable character editing", clear_mode, 1, MODE_EDIT }, 1165 { "softtabs", "Enable tab expansion", set_mode, 1, MODE_SOFT_TAB }, 1166 { "+softtabs", 0, set_mode, 1, MODE_SOFT_TAB }, 1167 { "-softtabs", "Disable character editing", clear_mode, 1, MODE_SOFT_TAB }, 1168 { "litecho", "Enable literal character echo", set_mode, 1, MODE_LIT_ECHO }, 1169 { "+litecho", 0, set_mode, 1, MODE_LIT_ECHO }, 1170 { "-litecho", "Disable literal character echo", clear_mode, 1, MODE_LIT_ECHO }, 1171 { "help", 0, modehelp, 0, 0 }, 1172 #ifdef KLUDGELINEMODE 1173 { "kludgeline", 0, dokludgemode, 1, 0 }, 1174 #endif 1175 { "", "", 0, 0, 0 }, 1176 { "?", "Print help information", modehelp, 0, 0 }, 1177 { .name = 0 }, 1178 }; 1179 1180 1181 int 1182 modehelp(int n) 1183 { 1184 struct modelist *mt; 1185 1186 printf("format is: 'mode Mode', where 'Mode' is one of:\n\n"); 1187 for (mt = ModeList; mt->name; mt++) { 1188 if (mt->help) { 1189 if (*mt->help) 1190 printf("%-15s %s\n", mt->name, mt->help); 1191 else 1192 printf("\n"); 1193 } 1194 } 1195 return 0; 1196 } 1197 1198 #define GETMODECMD(name) (struct modelist *) \ 1199 genget(name, (char **) ModeList, sizeof(struct modelist)) 1200 1201 static int 1202 modecmd(int argc, char *argv[]) 1203 { 1204 struct modelist *mt; 1205 1206 if (argc != 2) { 1207 printf("'mode' command requires an argument\n"); 1208 printf("'mode ?' for help.\n"); 1209 } else if ((mt = GETMODECMD(argv[1])) == 0) { 1210 fprintf(stderr, "Unknown mode '%s' ('mode ?' for help).\n", argv[1]); 1211 } else if (Ambiguous(mt)) { 1212 fprintf(stderr, "Ambiguous mode '%s' ('mode ?' for help).\n", argv[1]); 1213 } else if (mt->needconnect && !connected) { 1214 printf("?Need to be connected first.\n"); 1215 printf("'mode ?' for help.\n"); 1216 } else if (mt->handler) { 1217 return (*mt->handler)(mt->arg1); 1218 } 1219 return 0; 1220 } 1221 1222 /* 1223 * The following data structures and routines implement the 1224 * "display" command. 1225 */ 1226 1227 static int 1228 display(int argc, char *argv[]) 1229 { 1230 struct togglelist *tl; 1231 struct setlist *sl; 1232 1233 #define dotog(tl) if (tl->variable && tl->actionexplanation) { \ 1234 if (*tl->variable) { \ 1235 printf("will"); \ 1236 } else { \ 1237 printf("won't"); \ 1238 } \ 1239 printf(" %s.\n", tl->actionexplanation); \ 1240 } 1241 1242 #define doset(sl) if (sl->name && *sl->name != ' ') { \ 1243 if (sl->handler == 0) \ 1244 printf("%-15s [%s]\n", sl->name, control(*sl->charp)); \ 1245 else \ 1246 printf("%-15s \"%s\"\n", sl->name, (char *)sl->charp); \ 1247 } 1248 1249 if (argc == 1) { 1250 for (tl = Togglelist; tl->name; tl++) { 1251 dotog(tl); 1252 } 1253 printf("\n"); 1254 for (sl = Setlist; sl->name; sl++) { 1255 doset(sl); 1256 } 1257 } else { 1258 int i; 1259 1260 for (i = 1; i < argc; i++) { 1261 sl = getset(argv[i]); 1262 tl = GETTOGGLE(argv[i]); 1263 if (Ambiguous(sl) || Ambiguous(tl)) { 1264 printf("?Ambiguous argument '%s'.\n", argv[i]); 1265 return 0; 1266 } else if (!sl && !tl) { 1267 printf("?Unknown argument '%s'.\n", argv[i]); 1268 return 0; 1269 } else { 1270 if (tl) { 1271 dotog(tl); 1272 } 1273 if (sl) { 1274 doset(sl); 1275 } 1276 } 1277 } 1278 } 1279 /*@*/optionstatus(); 1280 #ifdef ENCRYPTION 1281 EncryptStatus(); 1282 #endif /* ENCRYPTION */ 1283 return 1; 1284 #undef doset 1285 #undef dotog 1286 } 1287 1288 /* 1289 * The following are the data structures, and many of the routines, 1290 * relating to command processing. 1291 */ 1292 1293 /* 1294 * Set the escape character. 1295 */ 1296 static int 1297 setescape(int argc, char *argv[]) 1298 { 1299 char *arg; 1300 char buf[50]; 1301 1302 printf( 1303 "Deprecated usage - please use 'set escape%s%s' in the future.\n", 1304 (argc > 2)? " ":"", (argc > 2)? argv[1]: ""); 1305 if (argc > 2) 1306 arg = argv[1]; 1307 else { 1308 printf("new escape character: "); 1309 (void) fgets(buf, sizeof(buf), stdin); 1310 arg = buf; 1311 } 1312 if (arg[0] != '\0') 1313 escape = arg[0]; 1314 if (!In3270) { 1315 printf("Escape character is '%s'.\n", control(escape)); 1316 } 1317 (void) fflush(stdout); 1318 return 1; 1319 } 1320 1321 /*VARARGS*/ 1322 static int 1323 togcrmod(int argc, char *argv[]) 1324 { 1325 crmod = !crmod; 1326 printf("Deprecated usage - please use 'toggle crmod' in the future.\n"); 1327 printf("%s map carriage return on output.\n", crmod ? "Will" : "Won't"); 1328 (void) fflush(stdout); 1329 return 1; 1330 } 1331 1332 /*VARARGS*/ 1333 int 1334 suspend(int argc, char *argv[]) 1335 { 1336 setcommandmode(); 1337 { 1338 long oldrows, oldcols, newrows, newcols, err; 1339 1340 err = (TerminalWindowSize(&oldrows, &oldcols) == 0) ? 1 : 0; 1341 (void) kill(0, SIGTSTP); 1342 /* 1343 * If we didn't get the window size before the SUSPEND, but we 1344 * can get them now (?), then send the NAWS to make sure that 1345 * we are set up for the right window size. 1346 */ 1347 if (TerminalWindowSize(&newrows, &newcols) && connected && 1348 (err || ((oldrows != newrows) || (oldcols != newcols)))) { 1349 sendnaws(); 1350 } 1351 } 1352 /* reget parameters in case they were changed */ 1353 TerminalSaveState(); 1354 setconnmode(0); 1355 return 1; 1356 } 1357 1358 #ifndef TN3270 1359 /*ARGSUSED*/ 1360 int 1361 shell(int argc, char *argv[]) 1362 { 1363 long oldrows, oldcols, newrows, newcols; 1364 long volatile err; /* Avoid vfork clobbering */ 1365 1366 setcommandmode(); 1367 1368 err = (TerminalWindowSize(&oldrows, &oldcols) == 0) ? 1 : 0; 1369 switch(vfork()) { 1370 case -1: 1371 perror("Fork failed"); 1372 break; 1373 1374 case 0: 1375 { 1376 /* 1377 * Fire up the shell in the child. 1378 */ 1379 const char *shellp, *shellname; 1380 1381 shellp = getenv("SHELL"); 1382 if (shellp == NULL) 1383 shellp = "/bin/sh"; 1384 if ((shellname = strrchr(shellp, '/')) == 0) 1385 shellname = shellp; 1386 else 1387 shellname++; 1388 if (argc > 1) 1389 execl(shellp, shellname, "-c", &saveline[1], NULL); 1390 else 1391 execl(shellp, shellname, NULL); 1392 perror("execl"); 1393 _exit(1); 1394 } 1395 default: 1396 (void)wait((int *)0); /* Wait for the shell to complete */ 1397 1398 if (TerminalWindowSize(&newrows, &newcols) && connected && 1399 (err || ((oldrows != newrows) || (oldcols != newcols)))) { 1400 sendnaws(); 1401 } 1402 break; 1403 } 1404 return 1; 1405 } 1406 #endif /* !defined(TN3270) */ 1407 1408 /*VARARGS*/ 1409 static int 1410 bye(int argc, char *argv[]) 1411 { 1412 extern int resettermname; 1413 1414 if (connected) { 1415 (void) shutdown(net, 2); 1416 printf("Connection closed.\n"); 1417 (void) NetClose(net); 1418 connected = 0; 1419 resettermname = 1; 1420 #if defined(AUTHENTICATION) || defined(ENCRYPTION) 1421 auth_encrypt_connect(connected); 1422 #endif /* defined(AUTHENTICATION) */ 1423 /* reset options */ 1424 tninit(); 1425 #ifdef TN3270 1426 SetIn3270(); /* Get out of 3270 mode */ 1427 #endif /* defined(TN3270) */ 1428 } 1429 if ((argc != 2) || (strcmp(argv[1], "fromquit") != 0)) { 1430 longjmp(toplevel, 1); 1431 /* NOTREACHED */ 1432 } 1433 return 1; /* Keep lint, etc., happy */ 1434 } 1435 1436 /*VARARGS*/ 1437 int 1438 quit(int argc, char *argv[]) 1439 { 1440 (void) call(bye, "bye", "fromquit", 0); 1441 Exit(0); 1442 /*NOTREACHED*/ 1443 } 1444 1445 /*VARARGS*/ 1446 int 1447 logout(int argc, char *argv[]) 1448 { 1449 send_do(TELOPT_LOGOUT, 1); 1450 (void) netflush(); 1451 return 1; 1452 } 1453 1454 1455 /* 1456 * The SLC command. 1457 */ 1458 1459 struct slclist { 1460 const char *name; 1461 const char *help; 1462 void (*handler)(int); 1463 int arg; 1464 }; 1465 1466 struct slclist SlcList[] = { 1467 { "export", "Use local special character definitions", 1468 slc_mode_export, 0 }, 1469 { "import", "Use remote special character definitions", 1470 slc_mode_import, 1 }, 1471 { "check", "Verify remote special character definitions", 1472 slc_mode_import, 0 }, 1473 { "help", 0, slc_help, 0 }, 1474 { "?", "Print help information", slc_help, 0 }, 1475 { .name = 0 }, 1476 }; 1477 1478 static void 1479 slc_help(int n) 1480 { 1481 struct slclist *c; 1482 1483 for (c = SlcList; c->name; c++) { 1484 if (c->help) { 1485 if (*c->help) 1486 printf("%-15s %s\n", c->name, c->help); 1487 else 1488 printf("\n"); 1489 } 1490 } 1491 } 1492 1493 static struct slclist * 1494 getslc(char *name) 1495 { 1496 return (struct slclist *) 1497 genget(name, (char **) SlcList, sizeof(struct slclist)); 1498 } 1499 1500 static int 1501 slccmd(int argc, char *argv[]) 1502 { 1503 struct slclist *c; 1504 1505 if (argc != 2) { 1506 fprintf(stderr, 1507 "Need an argument to 'slc' command. 'slc ?' for help.\n"); 1508 return 0; 1509 } 1510 c = getslc(argv[1]); 1511 if (c == 0) { 1512 fprintf(stderr, "'%s': unknown argument ('slc ?' for help).\n", 1513 argv[1]); 1514 return 0; 1515 } 1516 if (Ambiguous(c)) { 1517 fprintf(stderr, "'%s': ambiguous argument ('slc ?' for help).\n", 1518 argv[1]); 1519 return 0; 1520 } 1521 (*c->handler)(c->arg); 1522 slcstate(); 1523 return 1; 1524 } 1525 1526 /* 1527 * The ENVIRON command. 1528 */ 1529 1530 struct envlist { 1531 const char *name; 1532 const char *help; 1533 struct env_lst *(*handler)(const unsigned char *, unsigned char *); 1534 int narg; 1535 }; 1536 1537 struct envlist EnvList[] = { 1538 { "define", "Define an environment variable", 1539 env_define, 2 }, 1540 { "undefine", "Undefine an environment variable", 1541 env_undefine, 1 }, 1542 { "export", "Mark an environment variable for automatic export", 1543 env_export, 1 }, 1544 { "unexport", "Don't mark an environment variable for automatic export", 1545 env_unexport, 1 }, 1546 { "send", "Send an environment variable", env_send, 1 }, 1547 { "list", "List the current environment variables", 1548 env_list, 0 }, 1549 #if defined(OLD_ENVIRON) && defined(ENV_HACK) 1550 { "varval", "Reverse VAR and VALUE (auto, right, wrong, status)", 1551 env_varval, 1 }, 1552 #endif 1553 { "help", 0, env_help, 0 }, 1554 { "?", "Print help information", env_help, 0 }, 1555 { .name = 0 }, 1556 }; 1557 1558 static struct env_lst * 1559 env_help(const unsigned char *us1, unsigned char *us2) 1560 { 1561 struct envlist *c; 1562 1563 for (c = EnvList; c->name; c++) { 1564 if (c->help) { 1565 if (*c->help) 1566 printf("%-15s %s\n", c->name, c->help); 1567 else 1568 printf("\n"); 1569 } 1570 } 1571 return NULL; 1572 } 1573 1574 static struct envlist * 1575 getenvcmd(char *name) 1576 { 1577 return (struct envlist *) 1578 genget(name, (char **) EnvList, sizeof(struct envlist)); 1579 } 1580 1581 int 1582 env_cmd(int argc, char *argv[]) 1583 { 1584 struct envlist *c; 1585 1586 if (argc < 2) { 1587 fprintf(stderr, 1588 "Need an argument to 'environ' command. 'environ ?' for help.\n"); 1589 return 0; 1590 } 1591 c = getenvcmd(argv[1]); 1592 if (c == 0) { 1593 fprintf(stderr, "'%s': unknown argument ('environ ?' for help).\n", 1594 argv[1]); 1595 return 0; 1596 } 1597 if (Ambiguous(c)) { 1598 fprintf(stderr, "'%s': ambiguous argument ('environ ?' for help).\n", 1599 argv[1]); 1600 return 0; 1601 } 1602 if (c->narg + 2 != argc) { 1603 fprintf(stderr, 1604 "Need %s%d argument%s to 'environ %s' command. 'environ ?' for help.\n", 1605 c->narg < argc + 2 ? "only " : "", 1606 c->narg, c->narg == 1 ? "" : "s", c->name); 1607 return 0; 1608 } 1609 (*c->handler)(argv[2], argv[3]); 1610 return 1; 1611 } 1612 1613 struct env_lst { 1614 struct env_lst *next; /* pointer to next structure */ 1615 struct env_lst *prev; /* pointer to previous structure */ 1616 unsigned char *var; /* pointer to variable name */ 1617 unsigned char *value; /* pointer to variable value */ 1618 int export; /* 1 -> export with default list of variables */ 1619 int welldefined; /* A well defined variable */ 1620 }; 1621 1622 struct env_lst envlisthead; 1623 1624 struct env_lst * 1625 env_find(const unsigned char *var) 1626 { 1627 struct env_lst *ep; 1628 1629 for (ep = envlisthead.next; ep; ep = ep->next) { 1630 if (strcmp((const char *)ep->var, (const char *)var) == 0) 1631 return(ep); 1632 } 1633 return(NULL); 1634 } 1635 1636 void 1637 env_init(void) 1638 { 1639 extern char **environ; 1640 char **epp, *cp; 1641 struct env_lst *ep; 1642 1643 for (epp = environ; *epp; epp++) { 1644 if ((cp = strchr(*epp, '=')) != NULL) { 1645 *cp = '\0'; 1646 ep = env_define((unsigned char *)*epp, 1647 (unsigned char *)cp+1); 1648 ep->export = 0; 1649 *cp = '='; 1650 } 1651 } 1652 /* 1653 * Special case for DISPLAY variable. If it is ":0.0" or 1654 * "unix:0.0", we have to get rid of "unix" and insert our 1655 * hostname. 1656 */ 1657 if ((ep = env_find("DISPLAY")) 1658 && ((*ep->value == ':') 1659 || (strncmp((char *)ep->value, "unix:", 5) == 0))) { 1660 char hbuf[MAXHOSTNAMELEN + 1]; 1661 char *cp2 = strchr((char *)ep->value, ':'); 1662 1663 gethostname(hbuf, sizeof hbuf); 1664 hbuf[sizeof(hbuf) - 1] = '\0'; 1665 cp = (char *)malloc(strlen(hbuf) + strlen(cp2) + 1); 1666 sprintf((char *)cp, "%s%s", hbuf, cp2); 1667 free(ep->value); 1668 ep->value = (unsigned char *)cp; 1669 } 1670 /* 1671 * If USER is not defined, but LOGNAME is, then add 1672 * USER with the value from LOGNAME. By default, we 1673 * don't export the USER variable. 1674 */ 1675 if ((env_find("USER") == NULL) && (ep = env_find("LOGNAME"))) { 1676 env_define((const unsigned char *)"USER", ep->value); 1677 env_unexport((const unsigned char *)"USER", NULL); 1678 } 1679 env_export((const unsigned char *)"DISPLAY", NULL); 1680 env_export((const unsigned char *)"PRINTER", NULL); 1681 } 1682 1683 struct env_lst * 1684 env_define(const unsigned char *var, unsigned char *value) 1685 { 1686 struct env_lst *ep; 1687 1688 if ((ep = env_find(var)) != NULL) { 1689 if (ep->var) 1690 free(ep->var); 1691 if (ep->value) 1692 free(ep->value); 1693 } else { 1694 ep = (struct env_lst *)malloc(sizeof(struct env_lst)); 1695 ep->next = envlisthead.next; 1696 envlisthead.next = ep; 1697 ep->prev = &envlisthead; 1698 if (ep->next) 1699 ep->next->prev = ep; 1700 } 1701 ep->welldefined = opt_welldefined(var); 1702 ep->export = 1; 1703 ep->var = (unsigned char *)strdup((const char *)var); 1704 ep->value = (unsigned char *)strdup((const char *)value); 1705 return(ep); 1706 } 1707 1708 struct env_lst * 1709 env_undefine(const unsigned char *var, unsigned char *d) 1710 { 1711 struct env_lst *ep; 1712 1713 if ((ep = env_find(var)) != NULL) { 1714 ep->prev->next = ep->next; 1715 if (ep->next) 1716 ep->next->prev = ep->prev; 1717 if (ep->var) 1718 free(ep->var); 1719 if (ep->value) 1720 free(ep->value); 1721 free(ep); 1722 } 1723 return NULL; 1724 } 1725 1726 struct env_lst * 1727 env_export(const unsigned char *var, unsigned char *d) 1728 { 1729 struct env_lst *ep; 1730 1731 if ((ep = env_find(var)) != NULL) 1732 ep->export = 1; 1733 return NULL; 1734 } 1735 1736 struct env_lst * 1737 env_unexport(const unsigned char *var, unsigned char *d) 1738 { 1739 struct env_lst *ep; 1740 1741 if ((ep = env_find(var)) != NULL) 1742 ep->export = 0; 1743 return NULL; 1744 } 1745 1746 struct env_lst * 1747 env_send(const unsigned char *var, unsigned char *d) 1748 { 1749 struct env_lst *ep; 1750 1751 if (my_state_is_wont(TELOPT_NEW_ENVIRON) 1752 #ifdef OLD_ENVIRON 1753 && my_state_is_wont(TELOPT_OLD_ENVIRON) 1754 #endif 1755 ) { 1756 fprintf(stderr, 1757 "Cannot send '%s': Telnet ENVIRON option not enabled\n", 1758 var); 1759 return NULL; 1760 } 1761 ep = env_find(var); 1762 if (ep == 0) { 1763 fprintf(stderr, "Cannot send '%s': variable not defined\n", 1764 var); 1765 return NULL; 1766 } 1767 env_opt_start_info(); 1768 env_opt_add(ep->var); 1769 env_opt_end(0); 1770 return NULL; 1771 } 1772 1773 struct env_lst * 1774 env_list(const unsigned char *d1, unsigned char *d2) 1775 { 1776 struct env_lst *ep; 1777 1778 for (ep = envlisthead.next; ep; ep = ep->next) { 1779 printf("%c %-20s %s\n", ep->export ? '*' : ' ', 1780 ep->var, ep->value); 1781 } 1782 return NULL; 1783 } 1784 1785 unsigned char * 1786 env_default(int init, int welldefined) 1787 { 1788 static struct env_lst *nep = NULL; 1789 1790 if (init) { 1791 nep = &envlisthead; 1792 return NULL; 1793 } 1794 if (nep) { 1795 while ((nep = nep->next) != NULL) { 1796 if (nep->export && (nep->welldefined == welldefined)) 1797 return(nep->var); 1798 } 1799 } 1800 return(NULL); 1801 } 1802 1803 unsigned char * 1804 env_getvalue(const unsigned char *var) 1805 { 1806 struct env_lst *ep; 1807 1808 if ((ep = env_find(var)) != NULL) 1809 return(ep->value); 1810 return(NULL); 1811 } 1812 1813 #if defined(OLD_ENVIRON) && defined(ENV_HACK) 1814 void 1815 env_varval(const unsigned char *what) 1816 { 1817 extern int old_env_var, old_env_value, env_auto; 1818 int len = strlen((char *)what); 1819 1820 if (len == 0) 1821 goto unknown; 1822 1823 if (strncasecmp((char *)what, "status", len) == 0) { 1824 if (env_auto) 1825 printf("%s%s", "VAR and VALUE are/will be ", 1826 "determined automatically\n"); 1827 if (old_env_var == OLD_ENV_VAR) 1828 printf("VAR and VALUE set to correct definitions\n"); 1829 else 1830 printf("VAR and VALUE definitions are reversed\n"); 1831 } else if (strncasecmp((char *)what, "auto", len) == 0) { 1832 env_auto = 1; 1833 old_env_var = OLD_ENV_VALUE; 1834 old_env_value = OLD_ENV_VAR; 1835 } else if (strncasecmp((char *)what, "right", len) == 0) { 1836 env_auto = 0; 1837 old_env_var = OLD_ENV_VAR; 1838 old_env_value = OLD_ENV_VALUE; 1839 } else if (strncasecmp((char *)what, "wrong", len) == 0) { 1840 env_auto = 0; 1841 old_env_var = OLD_ENV_VALUE; 1842 old_env_value = OLD_ENV_VAR; 1843 } else { 1844 unknown: 1845 printf("Unknown \"varval\" command. (\"auto\", \"right\", \"wrong\", \"status\")\n"); 1846 } 1847 } 1848 #endif 1849 1850 #ifdef AUTHENTICATION 1851 /* 1852 * The AUTHENTICATE command. 1853 */ 1854 1855 struct authlist { 1856 const char *name; 1857 const char *help; 1858 int (*handler)(char *); 1859 int narg; 1860 }; 1861 1862 struct authlist AuthList[] = { 1863 { "status", "Display current status of authentication information", 1864 auth_status, 0 }, 1865 { "disable", "Disable an authentication type ('auth disable ?' for more)", 1866 auth_disable, 1 }, 1867 { "enable", "Enable an authentication type ('auth enable ?' for more)", 1868 auth_enable, 1 }, 1869 { "help", 0, auth_help, 0 }, 1870 { "?", "Print help information", auth_help, 0 }, 1871 { .name = 0 }, 1872 }; 1873 1874 static int 1875 auth_help(char *s) 1876 { 1877 struct authlist *c; 1878 1879 for (c = AuthList; c->name; c++) { 1880 if (c->help) { 1881 if (*c->help) 1882 printf("%-15s %s\n", c->name, c->help); 1883 else 1884 printf("\n"); 1885 } 1886 } 1887 return 0; 1888 } 1889 1890 int 1891 auth_cmd(int argc, char *argv[]) 1892 { 1893 struct authlist *c; 1894 1895 if (argc < 2) { 1896 fprintf(stderr, 1897 "Need an argument to 'auth' command. 'auth ?' for help.\n"); 1898 return 0; 1899 } 1900 1901 c = (struct authlist *) 1902 genget(argv[1], (char **) AuthList, sizeof(struct authlist)); 1903 if (c == 0) { 1904 fprintf(stderr, "'%s': unknown argument ('auth ?' for help).\n", 1905 argv[1]); 1906 return 0; 1907 } 1908 if (Ambiguous(c)) { 1909 fprintf(stderr, "'%s': ambiguous argument ('auth ?' for help).\n", 1910 argv[1]); 1911 return 0; 1912 } 1913 if (c->narg + 2 != argc) { 1914 fprintf(stderr, 1915 "Need %s%d argument%s to 'auth %s' command. 'auth ?' for help.\n", 1916 c->narg < argc + 2 ? "only " : "", 1917 c->narg, c->narg == 1 ? "" : "s", c->name); 1918 return 0; 1919 } 1920 return((*c->handler)(argv[2])); 1921 } 1922 #endif 1923 1924 #ifdef ENCRYPTION 1925 /* 1926 * The ENCRYPT command. 1927 */ 1928 1929 struct encryptlist { 1930 const char *name; 1931 const char *help; 1932 int (*handler)(char *, char *); 1933 int needconnect; 1934 int minarg; 1935 int maxarg; 1936 }; 1937 1938 static int 1939 EncryptHelp(char *, char *); 1940 typedef int (*encrypthandler)(char *, char *); 1941 1942 struct encryptlist EncryptList[] = { 1943 { "enable", "Enable encryption. ('encrypt enable ?' for more)", 1944 EncryptEnable, 1, 1, 2 }, 1945 { "disable", "Disable encryption. ('encrypt enable ?' for more)", 1946 EncryptDisable, 0, 1, 2 }, 1947 { "type", "Set encryption type. ('encrypt type ?' for more)", 1948 EncryptType, 0, 1, 1 }, 1949 { "start", "Start encryption. ('encrypt start ?' for more)", 1950 (encrypthandler) EncryptStart, 1, 0, 1 }, 1951 { "stop", "Stop encryption. ('encrypt stop ?' for more)", 1952 (encrypthandler) EncryptStop, 1, 0, 1 }, 1953 { "input", "Start encrypting the input stream", 1954 (encrypthandler) EncryptStartInput, 1, 0, 0 }, 1955 { "-input", "Stop encrypting the input stream", 1956 (encrypthandler) EncryptStopInput, 1, 0, 0 }, 1957 { "output", "Start encrypting the output stream", 1958 (encrypthandler) EncryptStartOutput, 1, 0, 0 }, 1959 { "-output", "Stop encrypting the output stream", 1960 (encrypthandler) EncryptStopOutput, 1, 0, 0 }, 1961 1962 { "status", "Display current status of authentication information", 1963 (encrypthandler) EncryptStatus, 0, 0, 0 }, 1964 { "help", 0, EncryptHelp, 0, 0, 0 }, 1965 { "?", "Print help information", EncryptHelp, 0, 0, 0 }, 1966 { .name = 0 }, 1967 }; 1968 1969 static int 1970 EncryptHelp(char *s1, char *s2) 1971 { 1972 struct encryptlist *c; 1973 1974 for (c = EncryptList; c->name; c++) { 1975 if (c->help) { 1976 if (*c->help) 1977 printf("%-15s %s\n", c->name, c->help); 1978 else 1979 printf("\n"); 1980 } 1981 } 1982 return (0); 1983 } 1984 1985 int 1986 encrypt_cmd(int argc, char *argv[]) 1987 { 1988 struct encryptlist *c; 1989 1990 if (argc < 2) { 1991 fprintf(stderr, 1992 "Need an argument to 'encrypt' command. " 1993 "'encrypt ?' for help.\n"); 1994 return (0); 1995 } 1996 1997 c = (struct encryptlist *) 1998 genget(argv[1], (char **) EncryptList, sizeof(struct encryptlist)); 1999 if (c == NULL) { 2000 fprintf(stderr, 2001 "'%s': unknown argument ('encrypt ?' for help).\n", 2002 argv[1]); 2003 return (0); 2004 } 2005 if (Ambiguous(c)) { 2006 fprintf(stderr, 2007 "'%s': ambiguous argument ('encrypt ?' for help).\n", 2008 argv[1]); 2009 return (0); 2010 } 2011 argc -= 2; 2012 if (argc < c->minarg || argc > c->maxarg) { 2013 if (c->minarg == c->maxarg) { 2014 fprintf(stderr, "Need %s%d argument%s ", 2015 c->minarg < argc ? "only " : "", c->minarg, 2016 c->minarg == 1 ? "" : "s"); 2017 } else { 2018 fprintf(stderr, "Need %s%d-%d arguments ", 2019 c->maxarg < argc ? "only " : "", c->minarg, 2020 c->maxarg); 2021 } 2022 fprintf(stderr, 2023 "to 'encrypt %s' command. 'encrypt ?' for help.\n", 2024 c->name); 2025 return (0); 2026 } 2027 if (c->needconnect && !connected) { 2028 if (!(argc && (isprefix(argv[2], "help") || 2029 isprefix(argv[2], "?")))) { 2030 printf("?Need to be connected first.\n"); 2031 return (0); 2032 } 2033 } 2034 return ((*c->handler)(argv[2], argv[3])); 2035 } 2036 #endif /* ENCRYPTION */ 2037 2038 #ifdef TN3270 2039 static void 2040 filestuff(int fd) 2041 { 2042 int res; 2043 2044 setconnmode(0); 2045 res = fcntl(fd, F_GETOWN, 0); 2046 setcommandmode(); 2047 2048 if (res == -1) { 2049 perror("fcntl"); 2050 return; 2051 } 2052 printf("\tOwner is %d.\n", res); 2053 2054 setconnmode(0); 2055 res = fcntl(fd, F_GETFL, 0); 2056 setcommandmode(); 2057 2058 if (res == -1) { 2059 perror("fcntl"); 2060 return; 2061 } 2062 #ifdef notdef 2063 printf("\tFlags are 0x%x: %s\n", res, decodeflags(res)); 2064 #endif 2065 } 2066 #endif /* defined(TN3270) */ 2067 2068 /* 2069 * Print status about the connection. 2070 */ 2071 /*ARGSUSED*/ 2072 static int 2073 status(int argc, char *argv[]) 2074 { 2075 if (connected) { 2076 printf("Connected to %s.\n", hostname); 2077 if ((argc < 2) || strcmp(argv[1], "notmuch")) { 2078 int mode = getconnmode(); 2079 2080 if (my_want_state_is_will(TELOPT_LINEMODE)) { 2081 printf("Operating with LINEMODE option\n"); 2082 printf("%s line editing\n", (mode&MODE_EDIT) ? "Local" : "No"); 2083 printf("%s catching of signals\n", 2084 (mode&MODE_TRAPSIG) ? "Local" : "No"); 2085 slcstate(); 2086 #ifdef KLUDGELINEMODE 2087 } else if (kludgelinemode && my_want_state_is_dont(TELOPT_SGA)) { 2088 printf("Operating in obsolete linemode\n"); 2089 #endif 2090 } else { 2091 printf("Operating in single character mode\n"); 2092 if (localchars) 2093 printf("Catching signals locally\n"); 2094 } 2095 printf("%s character echo\n", (mode&MODE_ECHO) ? "Local" : "Remote"); 2096 if (my_want_state_is_will(TELOPT_LFLOW)) 2097 printf("%s flow control\n", (mode&MODE_FLOW) ? "Local" : "No"); 2098 #ifdef ENCRYPTION 2099 encrypt_display(); 2100 #endif /* ENCRYPTION */ 2101 } 2102 } else { 2103 printf("No connection.\n"); 2104 } 2105 # ifndef TN3270 2106 printf("Escape character is '%s'.\n", control(escape)); 2107 (void) fflush(stdout); 2108 # else /* !defined(TN3270) */ 2109 if ((!In3270) && ((argc < 2) || strcmp(argv[1], "notmuch"))) { 2110 printf("Escape character is '%s'.\n", control(escape)); 2111 } 2112 if ((argc >= 2) && !strcmp(argv[1], "everything")) { 2113 printf("SIGIO received %d time%s.\n", 2114 sigiocount, (sigiocount == 1)? "":"s"); 2115 if (In3270) { 2116 printf("Process ID %d, process group %d.\n", 2117 getpid(), getpgrp()); 2118 printf("Terminal input:\n"); 2119 filestuff(tin); 2120 printf("Terminal output:\n"); 2121 filestuff(tout); 2122 printf("Network socket:\n"); 2123 filestuff(net); 2124 } 2125 } 2126 if (In3270 && transcom) { 2127 printf("Transparent mode command is '%s'.\n", transcom); 2128 } 2129 (void) fflush(stdout); 2130 if (In3270) { 2131 return 0; 2132 } 2133 # endif /* defined(TN3270) */ 2134 return 1; 2135 } 2136 2137 /* 2138 * Function that gets called when SIGINFO is received. 2139 */ 2140 int 2141 ayt_status(void) 2142 { 2143 return call(status, "status", "notmuch", 0); 2144 } 2145 2146 static const char * 2147 sockaddr_ntop(struct sockaddr *sa) 2148 { 2149 static char addrbuf[NI_MAXHOST]; 2150 const int niflags = NI_NUMERICHOST; 2151 2152 if (getnameinfo(sa, sa->sa_len, addrbuf, sizeof(addrbuf), 2153 NULL, 0, niflags) == 0) 2154 return addrbuf; 2155 else 2156 return NULL; 2157 } 2158 2159 #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC) 2160 static int setpolicy (int, struct addrinfo *, char *); 2161 2162 static int 2163 setpolicy(int netw, struct addrinfo *res, char *policy) 2164 { 2165 char *buf; 2166 int level; 2167 int optname; 2168 2169 if (policy == NULL) 2170 return 0; 2171 2172 buf = ipsec_set_policy(policy, strlen(policy)); 2173 if (buf == NULL) { 2174 printf("%s\n", ipsec_strerror()); 2175 return -1; 2176 } 2177 level = res->ai_family == AF_INET ? IPPROTO_IP : IPPROTO_IPV6; 2178 optname = res->ai_family == AF_INET ? IP_IPSEC_POLICY : IPV6_IPSEC_POLICY; 2179 if (setsockopt(netw, level, optname, buf, ipsec_get_policylen(buf)) < 0){ 2180 perror("setsockopt"); 2181 return -1; 2182 } 2183 2184 free(buf); 2185 return 0; 2186 } 2187 #endif 2188 2189 int 2190 tn(int argc, char *argv[]) 2191 { 2192 struct addrinfo hints, *res, *res0; 2193 const char *cause = "telnet: unknown"; 2194 int error; 2195 #if defined(IP_OPTIONS) && defined(IPPROTO_IP) 2196 char *srp = 0; 2197 long srlen; 2198 int proto, opt; 2199 #endif 2200 char *cmd, *hostp = 0; 2201 const char *portp = 0; 2202 const char *user = 0; 2203 2204 if (connected) { 2205 printf("?Already connected to %s\n", hostname); 2206 return 0; 2207 } 2208 if (argc < 2) { 2209 (void) strlcpy(line, "open ", sizeof(line)); 2210 printf("(to) "); 2211 (void) fgets(&line[strlen(line)], sizeof(line) - strlen(line), stdin); 2212 makeargv(); 2213 argc = margc; 2214 argv = margv; 2215 } 2216 cmd = *argv; 2217 --argc; ++argv; 2218 while (argc) { 2219 if (strcmp(*argv, "help") == 0 || isprefix(*argv, "?")) 2220 goto usage; 2221 if (strcmp(*argv, "-l") == 0) { 2222 --argc; ++argv; 2223 if (argc == 0) 2224 goto usage; 2225 user = *argv++; 2226 --argc; 2227 continue; 2228 } 2229 if (strcmp(*argv, "-a") == 0) { 2230 --argc; ++argv; 2231 autologin = 1; 2232 continue; 2233 } 2234 if (hostp == 0) { 2235 hostp = *argv++; 2236 --argc; 2237 continue; 2238 } 2239 if (portp == 0) { 2240 portp = *argv++; 2241 --argc; 2242 continue; 2243 } 2244 usage: 2245 printf("usage: %s [-l user] [-a] host-name [port]\n", cmd); 2246 return 0; 2247 } 2248 if (hostp == 0) 2249 goto usage; 2250 2251 (void) strlcpy(_hostname, hostp, sizeof(_hostname)); 2252 if (hostp[0] == '@' || hostp[0] == '!') { 2253 char *p; 2254 hostname = NULL; 2255 for (p = hostp + 1; *p; p++) { 2256 if (*p == ',' || *p == '@') 2257 hostname = p; 2258 } 2259 if (hostname == NULL) { 2260 fprintf(stderr, "%s: bad source route specification\n", hostp); 2261 return 0; 2262 } 2263 *hostname++ = '\0'; 2264 } else 2265 hostname = hostp; 2266 2267 if (!portp) { 2268 telnetport = 1; 2269 portp = "telnet"; 2270 } else if (portp[0] == '-') { 2271 /* use telnet negotiation if port number/name preceded by minus sign */ 2272 telnetport = 1; 2273 portp++; 2274 } else 2275 telnetport = 0; 2276 2277 memset(&hints, 0, sizeof(hints)); 2278 hints.ai_family = family; 2279 hints.ai_socktype = SOCK_STREAM; 2280 hints.ai_protocol = 0; 2281 hints.ai_flags = AI_NUMERICHOST; /* avoid forward lookup */ 2282 error = getaddrinfo(hostname, portp, &hints, &res0); 2283 if (!error) { 2284 /* numeric */ 2285 if (doaddrlookup && 2286 getnameinfo(res0->ai_addr, res0->ai_addrlen, 2287 _hostname, sizeof(_hostname), NULL, 0, NI_NAMEREQD) == 0) 2288 ; /* okay */ 2289 else 2290 strlcpy(_hostname, hostname, sizeof(_hostname)); 2291 } else { 2292 /* FQDN - try again with forward DNS lookup */ 2293 memset(&hints, 0, sizeof(hints)); 2294 hints.ai_family = family; 2295 hints.ai_socktype = SOCK_STREAM; 2296 hints.ai_protocol = 0; 2297 hints.ai_flags = AI_CANONNAME; 2298 error = getaddrinfo(hostname, portp, &hints, &res0); 2299 if (error == EAI_SERVICE) { 2300 fprintf(stderr, "tcp/%s: unknown service\n", portp); 2301 return 0; 2302 } else if (error) { 2303 fprintf(stderr, "%s: %s\n", hostname, gai_strerror(error)); 2304 return 0; 2305 } 2306 if (res0->ai_canonname) 2307 (void)strlcpy(_hostname, res0->ai_canonname, sizeof(_hostname)); 2308 else 2309 (void)strlcpy(_hostname, hostname, sizeof(_hostname)); 2310 } 2311 hostname = _hostname; 2312 2313 net = -1; 2314 for (res = res0; res; res = res->ai_next) { 2315 printf("Trying %s...\n", sockaddr_ntop(res->ai_addr)); 2316 net = socket(res->ai_family, res->ai_socktype, res->ai_protocol); 2317 if (net < 0) { 2318 cause = "telnet: socket"; 2319 continue; 2320 } 2321 2322 if (telnet_debug && SetSockOpt(net, SOL_SOCKET, SO_DEBUG, 1) < 0) { 2323 perror("setsockopt (SO_DEBUG)"); 2324 } 2325 if (hostp[0] == '@' || hostp[0] == '!') { 2326 if ((srlen = sourceroute(res, hostp, &srp, &proto, &opt)) < 0) { 2327 (void) NetClose(net); 2328 net = -1; 2329 continue; 2330 } 2331 if (srp && setsockopt(net, proto, opt, srp, srlen) < 0) 2332 perror("setsockopt (source route)"); 2333 } 2334 2335 #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC) 2336 if (setpolicy(net, res, ipsec_policy_in) < 0) { 2337 (void) NetClose(net); 2338 net = -1; 2339 continue; 2340 } 2341 if (setpolicy(net, res, ipsec_policy_out) < 0) { 2342 (void) NetClose(net); 2343 net = -1; 2344 continue; 2345 } 2346 #endif 2347 2348 if (connect(net, res->ai_addr, res->ai_addrlen) < 0) { 2349 if (res->ai_next) { 2350 int oerrno = errno; 2351 2352 fprintf(stderr, "telnet: connect to address %s: ", 2353 sockaddr_ntop(res->ai_addr)); 2354 errno = oerrno; 2355 perror((char *)0); 2356 } 2357 cause = "telnet: Unable to connect to remote host"; 2358 (void) NetClose(net); 2359 net = -1; 2360 continue; 2361 } 2362 2363 connected++; 2364 #if defined(AUTHENTICATION) || defined(ENCRYPTION) 2365 auth_encrypt_connect(connected); 2366 #endif /* defined(AUTHENTICATION) || defined(ENCRYPTION) */ 2367 break; 2368 } 2369 freeaddrinfo(res0); 2370 if (net < 0 || connected == 0) { 2371 perror(cause); 2372 return 0; 2373 } 2374 2375 cmdrc(hostp, hostname); 2376 if (autologin && user == NULL) { 2377 struct passwd *pw; 2378 2379 user = getenv("USER"); 2380 if (user == NULL || 2381 ((pw = getpwnam(user)) && pw->pw_uid != getuid())) { 2382 if ((pw = getpwuid(getuid())) != NULL) 2383 user = pw->pw_name; 2384 else 2385 user = NULL; 2386 } 2387 } 2388 if (user) { 2389 env_define((const unsigned char *)"USER", __UNCONST(user)); 2390 env_export((const unsigned char *)"USER", NULL); 2391 } 2392 (void) call(status, "status", "notmuch", 0); 2393 telnet(user); 2394 (void) NetClose(net); 2395 ExitString("Connection closed by foreign host.\n",1); 2396 /*NOTREACHED*/ 2397 } 2398 2399 #define HELPINDENT ((int)sizeof ("connect")) 2400 2401 static char 2402 openhelp[] = "connect to a site", 2403 closehelp[] = "close current connection", 2404 logouthelp[] = "forcibly logout remote user and close the connection", 2405 quithelp[] = "exit telnet", 2406 statushelp[] = "print status information", 2407 helphelp[] = "print help information", 2408 sendhelp[] = "transmit special characters ('send ?' for more)", 2409 sethelp[] = "set operating parameters ('set ?' for more)", 2410 unsethelp[] = "unset operating parameters ('unset ?' for more)", 2411 togglestring[] ="toggle operating parameters ('toggle ?' for more)", 2412 slchelp[] = "change state of special characters ('slc ?' for more)", 2413 displayhelp[] = "display operating parameters", 2414 #ifdef TN3270 2415 transcomhelp[] = "specify Unix command for transparent mode pipe", 2416 #endif /* defined(TN3270) */ 2417 #ifdef AUTHENTICATION 2418 authhelp[] = "turn on (off) authentication ('auth ?' for more)", 2419 #endif 2420 #ifdef ENCRYPTION 2421 encrypthelp[] = "turn on (off) encryption ('encrypt ?' for more)", 2422 #endif /* ENCRYPTION */ 2423 zhelp[] = "suspend telnet", 2424 shellhelp[] = "invoke a subshell", 2425 envhelp[] = "change environment variables ('environ ?' for more)", 2426 modestring[] = "try to enter line or character mode ('mode ?' for more)"; 2427 2428 static Command cmdtab[] = { 2429 { "close", closehelp, bye, 1 }, 2430 { "logout", logouthelp, logout, 1 }, 2431 { "display", displayhelp, display, 0 }, 2432 { "mode", modestring, modecmd, 0 }, 2433 { "open", openhelp, tn, 0 }, 2434 { "quit", quithelp, quit, 0 }, 2435 { "send", sendhelp, sendcmd, 0 }, 2436 { "set", sethelp, setcmd, 0 }, 2437 { "unset", unsethelp, unsetcmd, 0 }, 2438 { "status", statushelp, status, 0 }, 2439 { "toggle", togglestring, toggle, 0 }, 2440 { "slc", slchelp, slccmd, 0 }, 2441 #ifdef TN3270 2442 { "transcom", transcomhelp, settranscom, 0 }, 2443 #endif /* defined(TN3270) */ 2444 #ifdef AUTHENTICATION 2445 { "auth", authhelp, auth_cmd, 0 }, 2446 #endif 2447 #ifdef ENCRYPTION 2448 { "encrypt", encrypthelp, encrypt_cmd, 0 }, 2449 #endif 2450 { "z", zhelp, suspend, 0 }, 2451 #ifdef TN3270 2452 { "!", shellhelp, shell, 1 }, 2453 #else 2454 { "!", shellhelp, shell, 0 }, 2455 #endif 2456 { "environ", envhelp, env_cmd, 0 }, 2457 { "?", helphelp, help, 0 }, 2458 { NULL, NULL, NULL, 0 } 2459 }; 2460 2461 static char crmodhelp[] = "deprecated command -- use 'toggle crmod' instead"; 2462 static char escapehelp[] = "deprecated command -- use 'set escape' instead"; 2463 2464 static Command cmdtab2[] = { 2465 { "help", 0, help, 0 }, 2466 { "escape", escapehelp, setescape, 0 }, 2467 { "crmod", crmodhelp, togcrmod, 0 }, 2468 { NULL, NULL, NULL, 0 } 2469 }; 2470 2471 2472 /* 2473 * Call routine with argc, argv set from args (terminated by 0). 2474 */ 2475 2476 /*VARARGS1*/ 2477 static int 2478 call(intrtn_t routine, ...) 2479 { 2480 va_list ap; 2481 char *args[100]; 2482 int argno = 0; 2483 2484 va_start(ap, routine); 2485 while ((args[argno++] = va_arg(ap, char *)) != 0) { 2486 ; 2487 } 2488 va_end(ap); 2489 return (*routine)(argno-1, args); 2490 } 2491 2492 2493 static Command * 2494 getcmd(char *name) 2495 { 2496 Command *cm; 2497 2498 if ((cm = (Command *) genget(name, (char **) cmdtab, sizeof(Command))) != NULL) 2499 return cm; 2500 return (Command *) genget(name, (char **) cmdtab2, sizeof(Command)); 2501 } 2502 2503 void 2504 command(int top, const char *tbuf, int cnt) 2505 { 2506 Command *c; 2507 2508 setcommandmode(); 2509 if (!top) { 2510 putchar('\n'); 2511 } else { 2512 (void) signal(SIGINT, SIG_DFL); 2513 (void) signal(SIGQUIT, SIG_DFL); 2514 } 2515 for (;;) { 2516 if (rlogin == _POSIX_VDISABLE) 2517 printf("%s> ", prompt); 2518 if (tbuf) { 2519 char *cp; 2520 cp = line; 2521 while (cnt > 0 && (*cp++ = *tbuf++) != '\n') 2522 cnt--; 2523 tbuf = 0; 2524 if (cp == line || *--cp != '\n' || cp == line) 2525 goto getline; 2526 *cp = '\0'; 2527 if (rlogin == _POSIX_VDISABLE) 2528 printf("%s\n", line); 2529 } else { 2530 getline: 2531 if (rlogin != _POSIX_VDISABLE) 2532 printf("%s> ", prompt); 2533 #ifdef TN3270 2534 fflush(stdout); 2535 #endif 2536 if (fgets(line, sizeof(line), stdin) == NULL) { 2537 if (feof(stdin) || ferror(stdin)) { 2538 (void) quit(0, NULL); 2539 /*NOTREACHED*/ 2540 } 2541 break; 2542 } 2543 } 2544 if (line[0] == 0) 2545 break; 2546 makeargv(); 2547 if (margv[0] == 0) { 2548 break; 2549 } 2550 c = getcmd(margv[0]); 2551 if (Ambiguous(c)) { 2552 printf("?Ambiguous command\n"); 2553 continue; 2554 } 2555 if (c == 0) { 2556 printf("?Invalid command\n"); 2557 continue; 2558 } 2559 if (c->needconnect && !connected) { 2560 printf("?Need to be connected first.\n"); 2561 continue; 2562 } 2563 if ((*c->handler)(margc, margv)) { 2564 break; 2565 } 2566 } 2567 if (!top) { 2568 if (!connected) { 2569 longjmp(toplevel, 1); 2570 /*NOTREACHED*/ 2571 } 2572 #ifdef TN3270 2573 if (shell_active == 0) { 2574 setconnmode(0); 2575 } 2576 #else /* defined(TN3270) */ 2577 setconnmode(0); 2578 #endif /* defined(TN3270) */ 2579 } 2580 } 2581 2582 /* 2583 * Help command. 2584 */ 2585 static int 2586 help(int argc, char *argv[]) 2587 { 2588 Command *c; 2589 2590 if (argc == 1) { 2591 printf("Commands may be abbreviated. Commands are:\n\n"); 2592 for (c = cmdtab; c->name; c++) 2593 if (c->help) { 2594 printf("%-*s\t%s\n", HELPINDENT, c->name, 2595 c->help); 2596 } 2597 return 0; 2598 } 2599 while (--argc > 0) { 2600 char *arg; 2601 arg = *++argv; 2602 c = getcmd(arg); 2603 if (Ambiguous(c)) 2604 printf("?Ambiguous help command %s\n", arg); 2605 else if (c == (Command *)0) 2606 printf("?Invalid help command %s\n", arg); 2607 else 2608 printf("%s\n", c->help); 2609 } 2610 return 0; 2611 } 2612 2613 static char *rcname = 0; 2614 static char rcbuf[128]; 2615 2616 void 2617 cmdrc(const char *m1, const char *m2) 2618 { 2619 Command *c; 2620 FILE *rcfile; 2621 int gotmachine = 0; 2622 int l1 = strlen(m1); 2623 int l2 = strlen(m2); 2624 char m1save[MAXHOSTNAMELEN + 1]; 2625 2626 if (skiprc) 2627 return; 2628 2629 strlcpy(m1save, m1, sizeof(m1save)); 2630 m1 = m1save; 2631 2632 if (rcname == 0) { 2633 rcname = getenv("HOME"); 2634 if (rcname) 2635 strlcpy(rcbuf, rcname, sizeof(rcbuf)); 2636 else 2637 rcbuf[0] = '\0'; 2638 strlcat(rcbuf, "/.telnetrc", sizeof(rcbuf)); 2639 rcname = rcbuf; 2640 } 2641 2642 if ((rcfile = fopen(rcname, "r")) == 0) { 2643 return; 2644 } 2645 2646 for (;;) { 2647 if (fgets(line, sizeof(line), rcfile) == NULL) 2648 break; 2649 if (line[0] == 0) 2650 break; 2651 if (line[0] == '#') 2652 continue; 2653 if (gotmachine) { 2654 if (!isspace((unsigned char)line[0])) 2655 gotmachine = 0; 2656 } 2657 if (gotmachine == 0) { 2658 if (isspace((unsigned char)line[0])) 2659 continue; 2660 if (strncasecmp(line, m1, l1) == 0) 2661 strncpy(line, &line[l1], sizeof(line) - l1); 2662 else if (strncasecmp(line, m2, l2) == 0) 2663 strncpy(line, &line[l2], sizeof(line) - l2); 2664 else if (strncasecmp(line, "DEFAULT", 7) == 0) 2665 strncpy(line, &line[7], sizeof(line) - 7); 2666 else 2667 continue; 2668 if (line[0] != ' ' && line[0] != '\t' && line[0] != '\n') 2669 continue; 2670 gotmachine = 1; 2671 } 2672 makeargv(); 2673 if (margv[0] == 0) 2674 continue; 2675 c = getcmd(margv[0]); 2676 if (Ambiguous(c)) { 2677 printf("?Ambiguous command: %s\n", margv[0]); 2678 continue; 2679 } 2680 if (c == 0) { 2681 printf("?Invalid command: %s\n", margv[0]); 2682 continue; 2683 } 2684 /* 2685 * This should never happen... 2686 */ 2687 if (c->needconnect && !connected) { 2688 printf("?Need to be connected first for %s.\n", margv[0]); 2689 continue; 2690 } 2691 (*c->handler)(margc, margv); 2692 } 2693 fclose(rcfile); 2694 } 2695 2696 /* 2697 * Source route is handed in as 2698 * [!]@hop1@hop2...@dst 2699 * 2700 * If the leading ! is present, it is a strict source route, otherwise it is 2701 * assmed to be a loose source route. Note that leading ! is effective 2702 * only for IPv4 case. 2703 * 2704 * We fill in the source route option as 2705 * hop1,hop2,hop3...dest 2706 * and return a pointer to hop1, which will 2707 * be the address to connect() to. 2708 * 2709 * Arguments: 2710 * ai: The address (by struct addrinfo) for the final destination. 2711 * 2712 * arg: Pointer to route list to decipher 2713 * 2714 * cpp: Pointer to a pointer, so that sourceroute() can return 2715 * the address of result buffer (statically alloc'ed). 2716 * 2717 * protop/optp: 2718 * Pointer to an integer. The pointed variable 2719 * lenp: pointer to an integer that contains the 2720 * length of *cpp if *cpp != NULL. 2721 * 2722 * Return values: 2723 * 2724 * Returns the length of the option pointed to by *cpp. If the 2725 * return value is -1, there was a syntax error in the 2726 * option, either arg contained unknown characters or too many hosts, 2727 * or hostname cannot be resolved. 2728 * 2729 * The caller needs to pass return value (len), *cpp, *protop and *optp 2730 * to setsockopt(2). 2731 * 2732 * *cpp: Points to the result buffer. The region is statically 2733 * allocated by the function. 2734 * 2735 * *protop: 2736 * protocol # to be passed to setsockopt(2). 2737 * 2738 * *optp: option # to be passed to setsockopt(2). 2739 * 2740 */ 2741 int 2742 sourceroute(struct addrinfo *ai, char *arg, char **cpp, int *protop, int *optp) 2743 { 2744 char *cp, *cp2, *lsrp, *lsrep; 2745 struct addrinfo hints, *res; 2746 int len, error; 2747 struct sockaddr_in *sin; 2748 char c; 2749 static char lsr[44]; 2750 #ifdef INET6 2751 struct cmsghdr *cmsg; 2752 struct sockaddr_in6 *sin6; 2753 static char rhbuf[1024]; 2754 #endif 2755 2756 /* 2757 * Verify the arguments. 2758 */ 2759 if (cpp == NULL) 2760 return -1; 2761 2762 cp = arg; 2763 2764 *cpp = NULL; 2765 2766 /* init these just in case.... */ 2767 lsrp = NULL; 2768 lsrep = NULL; 2769 #ifdef INET6 2770 cmsg = NULL; 2771 #endif 2772 2773 switch (ai->ai_family) { 2774 case AF_INET: 2775 lsrp = lsr; 2776 lsrep = lsrp + sizeof(lsr); 2777 2778 /* 2779 * Next, decide whether we have a loose source 2780 * route or a strict source route, and fill in 2781 * the begining of the option. 2782 */ 2783 if (*cp == '!') { 2784 cp++; 2785 *lsrp++ = IPOPT_SSRR; 2786 } else 2787 *lsrp++ = IPOPT_LSRR; 2788 if (*cp != '@') 2789 return -1; 2790 lsrp++; /* skip over length, we'll fill it in later */ 2791 *lsrp++ = 4; 2792 cp++; 2793 *protop = IPPROTO_IP; 2794 *optp = IP_OPTIONS; 2795 break; 2796 #ifdef INET6 2797 case AF_INET6: 2798 #ifdef IPV6_PKTOPTIONS 2799 /* RFC2292 */ 2800 cmsg = inet6_rthdr_init(rhbuf, IPV6_RTHDR_TYPE_0); 2801 if (*cp != '@') 2802 return -1; 2803 cp++; 2804 *protop = IPPROTO_IPV6; 2805 *optp = IPV6_PKTOPTIONS; 2806 break; 2807 #else 2808 /* no RFC2292 */ 2809 return -1; 2810 #endif 2811 #endif 2812 default: 2813 return -1; 2814 } 2815 2816 memset(&hints, 0, sizeof(hints)); 2817 hints.ai_family = ai->ai_family; 2818 hints.ai_socktype = SOCK_STREAM; 2819 2820 for (c = 0;;) { 2821 if (c == ':') 2822 cp2 = 0; 2823 else for (cp2 = cp; (c = *cp2) != '\0'; cp2++) { 2824 if (c == ',') { 2825 *cp2++ = '\0'; 2826 if (*cp2 == '@') 2827 cp2++; 2828 } else if (c == '@') { 2829 *cp2++ = '\0'; 2830 } 2831 #if 0 /*colon conflicts with IPv6 address*/ 2832 else if (c == ':') { 2833 *cp2++ = '\0'; 2834 } 2835 #endif 2836 else 2837 continue; 2838 break; 2839 } 2840 if (!c) 2841 cp2 = 0; 2842 2843 error = getaddrinfo(cp, NULL, &hints, &res); 2844 if (error) { 2845 fprintf(stderr, "%s: %s\n", cp, gai_strerror(error)); 2846 return -1; 2847 } 2848 if (ai->ai_family != res->ai_family) { 2849 freeaddrinfo(res); 2850 return -1; 2851 } 2852 if (ai->ai_family == AF_INET) { 2853 /* 2854 * Check to make sure there is space for address 2855 */ 2856 if (lsrp + 4 > lsrep) { 2857 freeaddrinfo(res); 2858 return -1; 2859 } 2860 sin = (struct sockaddr_in *)res->ai_addr; 2861 memcpy(lsrp, &sin->sin_addr, sizeof(struct in_addr)); 2862 lsrp += sizeof(struct in_addr); 2863 } 2864 #ifdef INET6 2865 else if (ai->ai_family == AF_INET6) { 2866 sin6 = (struct sockaddr_in6 *)res->ai_addr; 2867 inet6_rthdr_add(cmsg, &sin6->sin6_addr, 2868 IPV6_RTHDR_LOOSE); 2869 } 2870 #endif 2871 else { 2872 freeaddrinfo(res); 2873 return -1; 2874 } 2875 freeaddrinfo(res); 2876 if (cp2) 2877 cp = cp2; 2878 else 2879 break; 2880 } 2881 switch (ai->ai_family) { 2882 case AF_INET: 2883 /* record the last hop */ 2884 if (lsrp + 4 > lsrep) 2885 return -1; 2886 sin = (struct sockaddr_in *)ai->ai_addr; 2887 memcpy(lsrp, &sin->sin_addr, sizeof(struct in_addr)); 2888 lsrp += sizeof(struct in_addr); 2889 lsr[IPOPT_OLEN] = lsrp - lsr; 2890 if (lsr[IPOPT_OLEN] <= 7 || lsr[IPOPT_OLEN] > 40) 2891 return -1; 2892 *lsrp++ = IPOPT_NOP; /*32bit word align*/ 2893 len = lsrp - lsr; 2894 *cpp = lsr; 2895 break; 2896 #ifdef INET6 2897 case AF_INET6: 2898 inet6_rthdr_lasthop(cmsg, IPV6_RTHDR_LOOSE); 2899 len = cmsg->cmsg_len; 2900 *cpp = rhbuf; 2901 break; 2902 #endif 2903 default: 2904 return -1; 2905 } 2906 return len; 2907 } 2908