1 /* $NetBSD: commands.c,v 1.56 2003/07/14 16:06:46 itojun 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. All advertising materials mentioning features or use of this software 45 * must display the following acknowledgement: 46 * This product includes software developed by the University of 47 * California, Berkeley and its contributors. 48 * 4. Neither the name of the University nor the names of its contributors 49 * may be used to endorse or promote products derived from this software 50 * without specific prior written permission. 51 * 52 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 53 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 54 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 55 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 56 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 57 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 58 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 59 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 60 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 61 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 62 * SUCH DAMAGE. 63 */ 64 65 #include <sys/cdefs.h> 66 #ifndef lint 67 #if 0 68 static char sccsid[] = "@(#)commands.c 8.4 (Berkeley) 5/30/95"; 69 #else 70 __RCSID("$NetBSD: commands.c,v 1.56 2003/07/14 16:06:46 itojun Exp $"); 71 #endif 72 #endif /* not lint */ 73 74 #include <sys/param.h> 75 #include <sys/file.h> 76 #include <sys/wait.h> 77 #include <sys/socket.h> 78 #include <netinet/in.h> 79 #include <arpa/inet.h> 80 81 #include <ctype.h> 82 #include <errno.h> 83 #include <netdb.h> 84 #include <pwd.h> 85 #include <signal.h> 86 #include <stdarg.h> 87 #include <unistd.h> 88 89 #include <arpa/telnet.h> 90 91 #include "general.h" 92 #include "ring.h" 93 #include "externs.h" 94 #include "defines.h" 95 #include "types.h" 96 #include <libtelnet/misc.h> 97 #ifdef AUTHENTICATION 98 #include <libtelnet/auth.h> 99 #endif 100 #ifdef ENCRYPTION 101 #include <libtelnet/encrypt.h> 102 #endif 103 104 #include <netinet/in_systm.h> 105 #include <netinet/ip.h> 106 107 108 #if defined(IPPROTO_IP) && defined(IP_TOS) 109 int tos = -1; 110 #endif /* defined(IPPROTO_IP) && defined(IP_TOS) */ 111 112 char *hostname; 113 static char _hostname[MAXHOSTNAMELEN]; 114 115 typedef struct { 116 char *name; /* command name */ 117 char *help; /* help string (NULL for no help) */ 118 int (*handler) /* routine which executes command */ 119 (int, char *[]); 120 int needconnect; /* Do we need to be connected to execute? */ 121 } Command; 122 123 static char line[256]; 124 static char saveline[256]; 125 static int margc; 126 static char *margv[20]; 127 128 static void makeargv(void); 129 static int special(char *); 130 static char *control(cc_t); 131 static int sendcmd(int, char **); 132 static int send_esc(char *); 133 static int send_docmd(char *); 134 static int send_dontcmd(char *); 135 static int send_willcmd(char *); 136 static int send_wontcmd(char *); 137 static int send_help(char *); 138 static int lclchars(int); 139 static int togdebug(int); 140 static int togcrlf(int); 141 static int togbinary(int); 142 static int togrbinary(int); 143 static int togxbinary(int); 144 static int togglehelp(int); 145 static void settogglehelp(int); 146 static int toggle(int, char *[]); 147 static struct setlist *getset(char *); 148 static int setcmd(int, char *[]); 149 static int unsetcmd(int, char *[]); 150 static int dokludgemode(int); 151 static int dolinemode(int); 152 static int docharmode(int); 153 static int dolmmode(int, int ); 154 static int modecmd(int, char *[]); 155 static int display(int, char *[]); 156 static int setescape(int, char *[]); 157 static int togcrmod(int, char *[]); 158 static int bye(int, char *[]); 159 static void slc_help(int); 160 static struct slclist *getslc(char *); 161 static int slccmd(int, char *[]); 162 static struct env_lst *env_help(unsigned char *, unsigned char *); 163 static struct envlist *getenvcmd(char *); 164 #ifdef AUTHENTICATION 165 static int auth_help(char *); 166 #endif 167 #ifdef TN3270 168 static void filestuff(int); 169 #endif 170 static int status(int, char *[]); 171 static const char *sockaddr_ntop (struct sockaddr *); 172 typedef int (*intrtn_t)(int, char **); 173 static int call(intrtn_t, ...); 174 static Command *getcmd(char *); 175 static int help(int, char *[]); 176 177 static void 178 makeargv(void) 179 { 180 char *cp, *cp2, c; 181 char **argp = margv; 182 183 margc = 0; 184 cp = line; 185 if (*cp == '!') { /* Special case shell escape */ 186 strlcpy(saveline, line, sizeof(saveline)); /* save for shell command */ 187 *argp++ = "!"; /* No room in string to get this */ 188 margc++; 189 cp++; 190 } 191 while ((c = *cp) != '\0') { 192 int inquote = 0; 193 while (isspace((unsigned char)c)) 194 c = *++cp; 195 if (c == '\0') 196 break; 197 *argp++ = cp; 198 margc += 1; 199 for (cp2 = cp; c != '\0'; c = *++cp) { 200 if (inquote) { 201 if (c == inquote) { 202 inquote = 0; 203 continue; 204 } 205 } else { 206 if (c == '\\') { 207 if ((c = *++cp) == '\0') 208 break; 209 } else if (c == '"') { 210 inquote = '"'; 211 continue; 212 } else if (c == '\'') { 213 inquote = '\''; 214 continue; 215 } else if (isspace((unsigned char)c)) 216 break; 217 } 218 *cp2++ = c; 219 } 220 *cp2 = '\0'; 221 if (c == '\0') 222 break; 223 cp++; 224 } 225 *argp++ = 0; 226 } 227 228 /* 229 * Make a character string into a number. 230 * 231 * Todo: 1. Could take random integers (12, 0x12, 012, 0b1). 232 */ 233 234 static int 235 special(char *s) 236 { 237 char c; 238 char b; 239 240 switch (*s) { 241 case '^': 242 b = *++s; 243 if (b == '?') { 244 c = b | 0x40; /* DEL */ 245 } else { 246 c = b & 0x1f; 247 } 248 break; 249 default: 250 c = *s; 251 break; 252 } 253 return c; 254 } 255 256 /* 257 * Construct a control character sequence 258 * for a special character. 259 */ 260 static char * 261 control(cc_t c) 262 { 263 static char buf[5]; 264 /* 265 * The only way I could get the Sun 3.5 compiler 266 * to shut up about 267 * if ((unsigned int)c >= 0x80) 268 * was to assign "c" to an unsigned int variable... 269 * Arggg.... 270 */ 271 unsigned int uic = (unsigned int)c; 272 273 if (uic == 0x7f) 274 return ("^?"); 275 if (c == (cc_t)_POSIX_VDISABLE) { 276 return "off"; 277 } 278 if (uic >= 0x80) { 279 buf[0] = '\\'; 280 buf[1] = ((c>>6)&07) + '0'; 281 buf[2] = ((c>>3)&07) + '0'; 282 buf[3] = (c&07) + '0'; 283 buf[4] = 0; 284 } else if (uic >= 0x20) { 285 buf[0] = c; 286 buf[1] = 0; 287 } else { 288 buf[0] = '^'; 289 buf[1] = '@'+c; 290 buf[2] = 0; 291 } 292 return (buf); 293 } 294 295 296 297 /* 298 * The following are data structures and routines for 299 * the "send" command. 300 * 301 */ 302 303 struct sendlist { 304 char *name; /* How user refers to it (case independent) */ 305 char *help; /* Help information (0 ==> no help) */ 306 int needconnect; /* Need to be connected */ 307 int narg; /* Number of arguments */ 308 int (*handler) /* Routine to perform (for special ops) */ 309 (char *); 310 int nbyte; /* Number of bytes to send this command */ 311 int what; /* Character to be sent (<0 ==> special) */ 312 }; 313 314 315 static struct sendlist Sendlist[] = { 316 { "ao", "Send Telnet Abort output", 1, 0, 0, 2, AO }, 317 { "ayt", "Send Telnet 'Are You There'", 1, 0, 0, 2, AYT }, 318 { "brk", "Send Telnet Break", 1, 0, 0, 2, BREAK }, 319 { "break", 0, 1, 0, 0, 2, BREAK }, 320 { "ec", "Send Telnet Erase Character", 1, 0, 0, 2, EC }, 321 { "el", "Send Telnet Erase Line", 1, 0, 0, 2, EL }, 322 { "escape", "Send current escape character", 1, 0, send_esc, 1, 0 }, 323 { "ga", "Send Telnet 'Go Ahead' sequence", 1, 0, 0, 2, GA }, 324 { "ip", "Send Telnet Interrupt Process", 1, 0, 0, 2, IP }, 325 { "intp", 0, 1, 0, 0, 2, IP }, 326 { "interrupt", 0, 1, 0, 0, 2, IP }, 327 { "intr", 0, 1, 0, 0, 2, IP }, 328 { "nop", "Send Telnet 'No operation'", 1, 0, 0, 2, NOP }, 329 { "eor", "Send Telnet 'End of Record'", 1, 0, 0, 2, EOR }, 330 { "abort", "Send Telnet 'Abort Process'", 1, 0, 0, 2, ABORT }, 331 { "susp", "Send Telnet 'Suspend Process'", 1, 0, 0, 2, SUSP }, 332 { "eof", "Send Telnet End of File Character", 1, 0, 0, 2, xEOF }, 333 { "synch", "Perform Telnet 'Synch operation'", 1, 0, dosynch, 2, 0 }, 334 { "getstatus", "Send request for STATUS", 1, 0, get_status, 6, 0 }, 335 { "?", "Display send options", 0, 0, send_help, 0, 0 }, 336 { "help", 0, 0, 0, send_help, 0, 0 }, 337 { "do", 0, 0, 1, send_docmd, 3, 0 }, 338 { "dont", 0, 0, 1, send_dontcmd, 3, 0 }, 339 { "will", 0, 0, 1, send_willcmd, 3, 0 }, 340 { "wont", 0, 0, 1, send_wontcmd, 3, 0 }, 341 { 0 } 342 }; 343 344 #define GETSEND(name) ((struct sendlist *) genget(name, (char **) Sendlist, \ 345 sizeof(struct sendlist))) 346 347 static int 348 sendcmd(int argc, char **argv) 349 { 350 int count; /* how many bytes we are going to need to send */ 351 int i; 352 struct sendlist *s; /* pointer to current command */ 353 int success = 0; 354 int needconnect = 0; 355 356 if (argc < 2) { 357 printf("need at least one argument for 'send' command\n"); 358 printf("'send ?' for help\n"); 359 return 0; 360 } 361 /* 362 * First, validate all the send arguments. 363 * In addition, we see how much space we are going to need, and 364 * whether or not we will be doing a "SYNCH" operation (which 365 * flushes the network queue). 366 */ 367 count = 0; 368 for (i = 1; i < argc; i++) { 369 s = GETSEND(argv[i]); 370 if (s == 0) { 371 printf("Unknown send argument '%s'\n'send ?' for help.\n", 372 argv[i]); 373 return 0; 374 } else if (Ambiguous(s)) { 375 printf("Ambiguous send argument '%s'\n'send ?' for help.\n", 376 argv[i]); 377 return 0; 378 } 379 if (i + s->narg >= argc) { 380 fprintf(stderr, 381 "Need %d argument%s to 'send %s' command. 'send %s ?' for help.\n", 382 s->narg, s->narg == 1 ? "" : "s", s->name, s->name); 383 return 0; 384 } 385 count += s->nbyte; 386 if (s->handler == send_help) { 387 send_help(NULL); 388 return 0; 389 } 390 391 i += s->narg; 392 needconnect += s->needconnect; 393 } 394 if (!connected && needconnect) { 395 printf("?Need to be connected first.\n"); 396 printf("'send ?' for help\n"); 397 return 0; 398 } 399 /* Now, do we have enough room? */ 400 if (NETROOM() < count) { 401 printf("There is not enough room in the buffer TO the network\n"); 402 printf("to process your request. Nothing will be done.\n"); 403 printf("('send synch' will throw away most data in the network\n"); 404 printf("buffer, if this might help.)\n"); 405 return 0; 406 } 407 /* OK, they are all OK, now go through again and actually send */ 408 count = 0; 409 for (i = 1; i < argc; i++) { 410 if ((s = GETSEND(argv[i])) == 0) { 411 fprintf(stderr, "Telnet 'send' error - argument disappeared!\n"); 412 (void) quit(0, NULL); 413 /*NOTREACHED*/ 414 } 415 if (s->handler) { 416 count++; 417 success += (*s->handler)(argv[i+1]); 418 i += s->narg; 419 } else { 420 NET2ADD(IAC, s->what); 421 printoption("SENT", IAC, s->what); 422 } 423 } 424 return (count == success); 425 } 426 427 static int 428 send_esc(char *s) 429 { 430 NETADD(escape); 431 return 1; 432 } 433 434 static int 435 send_docmd(char *name) 436 { 437 return(send_tncmd(send_do, "do", name)); 438 } 439 440 static int 441 send_dontcmd(char *name) 442 { 443 return(send_tncmd(send_dont, "dont", name)); 444 } 445 static int 446 send_willcmd(char *name) 447 { 448 return(send_tncmd(send_will, "will", name)); 449 } 450 static int 451 send_wontcmd(char *name) 452 { 453 return(send_tncmd(send_wont, "wont", name)); 454 } 455 456 int 457 send_tncmd(void (*func)(int, int), char *cmd, char *name) 458 { 459 char **cpp; 460 extern char *telopts[]; 461 int val = 0; 462 463 if (isprefix(name, "?")) { 464 int col, len; 465 466 printf("Usage: send %s <value|option>\n", cmd); 467 printf("\"value\" must be from 0 to 255\n"); 468 printf("Valid options are:\n\t"); 469 470 col = 8; 471 for (cpp = telopts; *cpp; cpp++) { 472 len = strlen(*cpp) + 3; 473 if (col + len > 65) { 474 printf("\n\t"); 475 col = 8; 476 } 477 printf(" \"%s\"", *cpp); 478 col += len; 479 } 480 printf("\n"); 481 return 0; 482 } 483 cpp = (char **)genget(name, telopts, sizeof(char *)); 484 if (Ambiguous(cpp)) { 485 fprintf(stderr,"'%s': ambiguous argument ('send %s ?' for help).\n", 486 name, cmd); 487 return 0; 488 } 489 if (cpp) { 490 val = cpp - telopts; 491 } else { 492 char *cp = name; 493 494 while (*cp >= '0' && *cp <= '9') { 495 val *= 10; 496 val += *cp - '0'; 497 cp++; 498 } 499 if (*cp != 0) { 500 fprintf(stderr, "'%s': unknown argument ('send %s ?' for help).\n", 501 name, cmd); 502 return 0; 503 } else if (val < 0 || val > 255) { 504 fprintf(stderr, "'%s': bad value ('send %s ?' for help).\n", 505 name, cmd); 506 return 0; 507 } 508 } 509 if (!connected) { 510 printf("?Need to be connected first.\n"); 511 return 0; 512 } 513 (*func)(val, 1); 514 return 1; 515 } 516 517 static int 518 send_help(char *n) 519 { 520 struct sendlist *s; /* pointer to current command */ 521 for (s = Sendlist; s->name; s++) { 522 if (s->help) 523 printf("%-15s %s\n", s->name, s->help); 524 } 525 return(0); 526 } 527 528 /* 529 * The following are the routines and data structures referred 530 * to by the arguments to the "toggle" command. 531 */ 532 533 static int 534 lclchars(int n) 535 { 536 donelclchars = 1; 537 return 1; 538 } 539 540 static int 541 togdebug(int n) 542 { 543 if (net > 0 && 544 (SetSockOpt(net, SOL_SOCKET, SO_DEBUG, debug)) < 0) { 545 perror("setsockopt (SO_DEBUG)"); 546 } 547 return 1; 548 } 549 550 static int 551 togcrlf(int n) 552 { 553 if (crlf) { 554 printf("Will send carriage returns as telnet <CR><LF>.\n"); 555 } else { 556 printf("Will send carriage returns as telnet <CR><NUL>.\n"); 557 } 558 return 1; 559 } 560 561 int binmode; 562 563 static int 564 togbinary(int val) 565 { 566 donebinarytoggle = 1; 567 568 if (val >= 0) { 569 binmode = val; 570 } else { 571 if (my_want_state_is_will(TELOPT_BINARY) && 572 my_want_state_is_do(TELOPT_BINARY)) { 573 binmode = 1; 574 } else if (my_want_state_is_wont(TELOPT_BINARY) && 575 my_want_state_is_dont(TELOPT_BINARY)) { 576 binmode = 0; 577 } 578 val = binmode ? 0 : 1; 579 } 580 581 if (val == 1) { 582 if (my_want_state_is_will(TELOPT_BINARY) && 583 my_want_state_is_do(TELOPT_BINARY)) { 584 printf("Already operating in binary mode with remote host.\n"); 585 } else { 586 printf("Negotiating binary mode with remote host.\n"); 587 tel_enter_binary(3); 588 } 589 } else { 590 if (my_want_state_is_wont(TELOPT_BINARY) && 591 my_want_state_is_dont(TELOPT_BINARY)) { 592 printf("Already in network ascii mode with remote host.\n"); 593 } else { 594 printf("Negotiating network ascii mode with remote host.\n"); 595 tel_leave_binary(3); 596 } 597 } 598 return 1; 599 } 600 601 static int 602 togrbinary(int val) 603 { 604 donebinarytoggle = 1; 605 606 if (val == -1) 607 val = my_want_state_is_do(TELOPT_BINARY) ? 0 : 1; 608 609 if (val == 1) { 610 if (my_want_state_is_do(TELOPT_BINARY)) { 611 printf("Already receiving in binary mode.\n"); 612 } else { 613 printf("Negotiating binary mode on input.\n"); 614 tel_enter_binary(1); 615 } 616 } else { 617 if (my_want_state_is_dont(TELOPT_BINARY)) { 618 printf("Already receiving in network ascii mode.\n"); 619 } else { 620 printf("Negotiating network ascii mode on input.\n"); 621 tel_leave_binary(1); 622 } 623 } 624 return 1; 625 } 626 627 static int 628 togxbinary(int val) 629 { 630 donebinarytoggle = 1; 631 632 if (val == -1) 633 val = my_want_state_is_will(TELOPT_BINARY) ? 0 : 1; 634 635 if (val == 1) { 636 if (my_want_state_is_will(TELOPT_BINARY)) { 637 printf("Already transmitting in binary mode.\n"); 638 } else { 639 printf("Negotiating binary mode on output.\n"); 640 tel_enter_binary(2); 641 } 642 } else { 643 if (my_want_state_is_wont(TELOPT_BINARY)) { 644 printf("Already transmitting in network ascii mode.\n"); 645 } else { 646 printf("Negotiating network ascii mode on output.\n"); 647 tel_leave_binary(2); 648 } 649 } 650 return 1; 651 } 652 653 #ifdef ENCRYPTION 654 extern int EncryptAutoEnc(int); 655 extern int EncryptAutoDec(int); 656 extern int EncryptDebug(int); 657 extern int EncryptVerbose(int); 658 #endif /* ENCRYPTION */ 659 660 struct togglelist { 661 char *name; /* name of toggle */ 662 char *help; /* help message */ 663 int (*handler) /* routine to do actual setting */ 664 (int); 665 int *variable; 666 char *actionexplanation; 667 }; 668 669 static struct togglelist Togglelist[] = { 670 { "autoflush", 671 "flushing of output when sending interrupt characters", 672 0, 673 &autoflush, 674 "flush output when sending interrupt characters" }, 675 { "autosynch", 676 "automatic sending of interrupt characters in urgent mode", 677 0, 678 &autosynch, 679 "send interrupt characters in urgent mode" }, 680 #ifdef AUTHENTICATION 681 { "autologin", 682 "automatic sending of login and/or authentication info", 683 0, 684 &autologin, 685 "send login name and/or authentication information" }, 686 { "authdebug", 687 "Toggle authentication debugging", 688 auth_togdebug, 689 0, 690 "print authentication debugging information" }, 691 #endif 692 #ifdef ENCRYPTION 693 { "autoencrypt", 694 "automatic encryption of data stream", 695 EncryptAutoEnc, 696 0, 697 "automatically encrypt output" }, 698 { "autodecrypt", 699 "automatic decryption of data stream", 700 EncryptAutoDec, 701 0, 702 "automatically decrypt input" }, 703 { "verbose_encrypt", 704 "Toggle verbose encryption output", 705 EncryptVerbose, 706 0, 707 "print verbose encryption output" }, 708 { "encdebug", 709 "Toggle encryption debugging", 710 EncryptDebug, 711 0, 712 "print encryption debugging information" }, 713 #endif /* ENCRYPTION */ 714 { "skiprc", 715 "don't read ~/.telnetrc file", 716 0, 717 &skiprc, 718 "skip reading of ~/.telnetrc file" }, 719 { "binary", 720 "sending and receiving of binary data", 721 togbinary, 722 0, 723 0 }, 724 { "inbinary", 725 "receiving of binary data", 726 togrbinary, 727 0, 728 0 }, 729 { "outbinary", 730 "sending of binary data", 731 togxbinary, 732 0, 733 0 }, 734 { "crlf", 735 "sending carriage returns as telnet <CR><LF>", 736 togcrlf, 737 &crlf, 738 0 }, 739 { "crmod", 740 "mapping of received carriage returns", 741 0, 742 &crmod, 743 "map carriage return on output" }, 744 { "localchars", 745 "local recognition of certain control characters", 746 lclchars, 747 &localchars, 748 "recognize certain control characters" }, 749 { " ", "", 0 }, /* empty line */ 750 #ifdef TN3270 751 { "apitrace", 752 "(debugging) toggle tracing of API transactions", 753 0, 754 &apitrace, 755 "trace API transactions" }, 756 { "cursesdata", 757 "(debugging) toggle printing of hexadecimal curses data", 758 0, 759 &cursesdata, 760 "print hexadecimal representation of curses data" }, 761 #endif /* defined(TN3270) */ 762 { "debug", 763 "debugging", 764 togdebug, 765 &debug, 766 "turn on socket level debugging" }, 767 { "netdata", 768 "printing of hexadecimal network data (debugging)", 769 0, 770 &netdata, 771 "print hexadecimal representation of network traffic" }, 772 { "prettydump", 773 "output of \"netdata\" to user readable format (debugging)", 774 0, 775 &prettydump, 776 "print user readable output for \"netdata\"" }, 777 { "options", 778 "viewing of options processing (debugging)", 779 0, 780 &showoptions, 781 "show option processing" }, 782 { "termdata", 783 "(debugging) toggle printing of hexadecimal terminal data", 784 0, 785 &termdata, 786 "print hexadecimal representation of terminal traffic" }, 787 { "?", 788 0, 789 togglehelp }, 790 { "help", 791 0, 792 togglehelp }, 793 { 0 } 794 }; 795 796 static int 797 togglehelp(int n) 798 { 799 struct togglelist *c; 800 801 for (c = Togglelist; c->name; c++) { 802 if (c->help) { 803 if (*c->help) 804 printf("%-15s toggle %s\n", c->name, c->help); 805 else 806 printf("\n"); 807 } 808 } 809 printf("\n"); 810 printf("%-15s %s\n", "?", "display help information"); 811 return 0; 812 } 813 814 static void 815 settogglehelp(int set) 816 { 817 struct togglelist *c; 818 819 for (c = Togglelist; c->name; c++) { 820 if (c->help) { 821 if (*c->help) 822 printf("%-15s %s %s\n", c->name, set ? "enable" : "disable", 823 c->help); 824 else 825 printf("\n"); 826 } 827 } 828 } 829 830 #define GETTOGGLE(name) (struct togglelist *) \ 831 genget(name, (char **) Togglelist, sizeof(struct togglelist)) 832 833 static int 834 toggle(int argc, char *argv[]) 835 { 836 int retval = 1; 837 char *name; 838 struct togglelist *c; 839 840 if (argc < 2) { 841 fprintf(stderr, 842 "Need an argument to 'toggle' command. 'toggle ?' for help.\n"); 843 return 0; 844 } 845 argc--; 846 argv++; 847 while (argc--) { 848 name = *argv++; 849 c = GETTOGGLE(name); 850 if (Ambiguous(c)) { 851 fprintf(stderr, "'%s': ambiguous argument ('toggle ?' for help).\n", 852 name); 853 return 0; 854 } else if (c == 0) { 855 fprintf(stderr, "'%s': unknown argument ('toggle ?' for help).\n", 856 name); 857 return 0; 858 } else { 859 if (c->variable) { 860 *c->variable = !*c->variable; /* invert it */ 861 if (c->actionexplanation) { 862 printf("%s %s.\n", *c->variable? "Will" : "Won't", 863 c->actionexplanation); 864 } 865 } 866 if (c->handler) { 867 retval &= (*c->handler)(-1); 868 } 869 } 870 } 871 return retval; 872 } 873 874 /* 875 * The following perform the "set" command. 876 */ 877 878 struct termios new_tc = { 0 }; 879 880 struct setlist { 881 char *name; /* name */ 882 char *help; /* help information */ 883 void (*handler)(char *); 884 cc_t *charp; /* where it is located at */ 885 }; 886 887 static struct setlist Setlist[] = { 888 #ifdef KLUDGELINEMODE 889 { "echo", "character to toggle local echoing on/off", 0, &echoc }, 890 #endif 891 { "escape", "character to escape back to telnet command mode", 0, &escape }, 892 { "rlogin", "rlogin escape character", 0, &rlogin }, 893 { "tracefile", "file to write trace information to", SetNetTrace, (cc_t *)NetTraceFile}, 894 { " ", "" }, 895 { " ", "The following need 'localchars' to be toggled true", 0, 0 }, 896 { "flushoutput", "character to cause an Abort Output", 0, termFlushCharp }, 897 { "interrupt", "character to cause an Interrupt Process", 0, termIntCharp }, 898 { "quit", "character to cause an Abort process", 0, termQuitCharp }, 899 { "eof", "character to cause an EOF ", 0, termEofCharp }, 900 { " ", "" }, 901 { " ", "The following are for local editing in linemode", 0, 0 }, 902 { "erase", "character to use to erase a character", 0, termEraseCharp }, 903 { "kill", "character to use to erase a line", 0, termKillCharp }, 904 { "lnext", "character to use for literal next", 0, termLiteralNextCharp }, 905 { "susp", "character to cause a Suspend Process", 0, termSuspCharp }, 906 { "reprint", "character to use for line reprint", 0, termRprntCharp }, 907 { "worderase", "character to use to erase a word", 0, termWerasCharp }, 908 { "start", "character to use for XON", 0, termStartCharp }, 909 { "stop", "character to use for XOFF", 0, termStopCharp }, 910 { "forw1", "alternate end of line character", 0, termForw1Charp }, 911 { "forw2", "alternate end of line character", 0, termForw2Charp }, 912 { "ayt", "alternate AYT character", 0, termAytCharp }, 913 { 0 } 914 }; 915 916 static struct setlist * 917 getset(char *name) 918 { 919 return (struct setlist *) 920 genget(name, (char **) Setlist, sizeof(struct setlist)); 921 } 922 923 void 924 set_escape_char(char *s) 925 { 926 if (rlogin != _POSIX_VDISABLE) { 927 rlogin = (s && *s) ? special(s) : _POSIX_VDISABLE; 928 printf("Telnet rlogin escape character is '%s'.\n", 929 control(rlogin)); 930 } else { 931 escape = (s && *s) ? special(s) : _POSIX_VDISABLE; 932 printf("Telnet escape character is '%s'.\n", control(escape)); 933 } 934 } 935 936 static int 937 setcmd(int argc, char *argv[]) 938 { 939 int value; 940 struct setlist *ct; 941 struct togglelist *c; 942 943 if (argc < 2 || argc > 3) { 944 printf("Format is 'set Name Value'\n'set ?' for help.\n"); 945 return 0; 946 } 947 if ((argc == 2) && (isprefix(argv[1], "?") || isprefix(argv[1], "help"))) { 948 for (ct = Setlist; ct->name; ct++) 949 printf("%-15s %s\n", ct->name, ct->help); 950 printf("\n"); 951 settogglehelp(1); 952 printf("%-15s %s\n", "?", "display help information"); 953 return 0; 954 } 955 956 ct = getset(argv[1]); 957 if (ct == 0) { 958 c = GETTOGGLE(argv[1]); 959 if (c == 0) { 960 fprintf(stderr, "'%s': unknown argument ('set ?' for help).\n", 961 argv[1]); 962 return 0; 963 } else if (Ambiguous(c)) { 964 fprintf(stderr, "'%s': ambiguous argument ('set ?' for help).\n", 965 argv[1]); 966 return 0; 967 } 968 if (c->variable) { 969 if ((argc == 2) || (strcmp("on", argv[2]) == 0)) 970 *c->variable = 1; 971 else if (strcmp("off", argv[2]) == 0) 972 *c->variable = 0; 973 else { 974 printf("Format is 'set togglename [on|off]'\n'set ?' for help.\n"); 975 return 0; 976 } 977 if (c->actionexplanation) { 978 printf("%s %s.\n", *c->variable? "Will" : "Won't", 979 c->actionexplanation); 980 } 981 } 982 if (c->handler) 983 (*c->handler)(1); 984 } else if (argc != 3) { 985 printf("Format is 'set Name Value'\n'set ?' for help.\n"); 986 return 0; 987 } else if (Ambiguous(ct)) { 988 fprintf(stderr, "'%s': ambiguous argument ('set ?' for help).\n", 989 argv[1]); 990 return 0; 991 } else if (ct->handler) { 992 (*ct->handler)(argv[2]); 993 printf("%s set to \"%s\".\n", ct->name, (char *)ct->charp); 994 } else { 995 if (strcmp("off", argv[2])) { 996 value = special(argv[2]); 997 } else { 998 value = _POSIX_VDISABLE; 999 } 1000 *(ct->charp) = (cc_t)value; 1001 printf("%s character is '%s'.\n", ct->name, control(*(ct->charp))); 1002 } 1003 slc_check(); 1004 return 1; 1005 } 1006 1007 static int 1008 unsetcmd(int argc, char *argv[]) 1009 { 1010 struct setlist *ct; 1011 struct togglelist *c; 1012 char *name; 1013 1014 if (argc < 2) { 1015 fprintf(stderr, 1016 "Need an argument to 'unset' command. 'unset ?' for help.\n"); 1017 return 0; 1018 } 1019 if (isprefix(argv[1], "?") || isprefix(argv[1], "help")) { 1020 for (ct = Setlist; ct->name; ct++) 1021 printf("%-15s %s\n", ct->name, ct->help); 1022 printf("\n"); 1023 settogglehelp(0); 1024 printf("%-15s %s\n", "?", "display help information"); 1025 return 0; 1026 } 1027 1028 argc--; 1029 argv++; 1030 while (argc--) { 1031 name = *argv++; 1032 ct = getset(name); 1033 if (ct == 0) { 1034 c = GETTOGGLE(name); 1035 if (c == 0) { 1036 fprintf(stderr, "'%s': unknown argument ('unset ?' for help).\n", 1037 name); 1038 return 0; 1039 } else if (Ambiguous(c)) { 1040 fprintf(stderr, "'%s': ambiguous argument ('unset ?' for help).\n", 1041 name); 1042 return 0; 1043 } 1044 if (c->variable) { 1045 *c->variable = 0; 1046 if (c->actionexplanation) { 1047 printf("%s %s.\n", *c->variable? "Will" : "Won't", 1048 c->actionexplanation); 1049 } 1050 } 1051 if (c->handler) 1052 (*c->handler)(0); 1053 } else if (Ambiguous(ct)) { 1054 fprintf(stderr, "'%s': ambiguous argument ('unset ?' for help).\n", 1055 name); 1056 return 0; 1057 } else if (ct->handler) { 1058 (*ct->handler)(0); 1059 printf("%s reset to \"%s\".\n", ct->name, (char *)ct->charp); 1060 } else { 1061 *(ct->charp) = _POSIX_VDISABLE; 1062 printf("%s character is '%s'.\n", ct->name, control(*(ct->charp))); 1063 } 1064 } 1065 return 1; 1066 } 1067 1068 /* 1069 * The following are the data structures and routines for the 1070 * 'mode' command. 1071 */ 1072 #ifdef KLUDGELINEMODE 1073 extern int kludgelinemode; 1074 1075 static int 1076 dokludgemode(int n) 1077 { 1078 kludgelinemode = 1; 1079 send_wont(TELOPT_LINEMODE, 1); 1080 send_dont(TELOPT_SGA, 1); 1081 send_dont(TELOPT_ECHO, 1); 1082 return 1; 1083 } 1084 #endif 1085 1086 static int 1087 dolinemode(int n) 1088 { 1089 #ifdef KLUDGELINEMODE 1090 if (kludgelinemode) 1091 send_dont(TELOPT_SGA, 1); 1092 #endif 1093 send_will(TELOPT_LINEMODE, 1); 1094 send_dont(TELOPT_ECHO, 1); 1095 return 1; 1096 } 1097 1098 static int 1099 docharmode(int n) 1100 { 1101 #ifdef KLUDGELINEMODE 1102 if (kludgelinemode) 1103 send_do(TELOPT_SGA, 1); 1104 else 1105 #endif 1106 send_wont(TELOPT_LINEMODE, 1); 1107 send_do(TELOPT_ECHO, 1); 1108 return 1; 1109 } 1110 1111 static int 1112 dolmmode(int bit, int on) 1113 { 1114 unsigned char c; 1115 extern int linemode; 1116 1117 if (my_want_state_is_wont(TELOPT_LINEMODE)) { 1118 printf("?Need to have LINEMODE option enabled first.\n"); 1119 printf("'mode ?' for help.\n"); 1120 return 0; 1121 } 1122 1123 if (on) 1124 c = (linemode | bit); 1125 else 1126 c = (linemode & ~bit); 1127 lm_mode(&c, 1, 1); 1128 return 1; 1129 } 1130 1131 int 1132 set_mode(int bit) 1133 { 1134 return dolmmode(bit, 1); 1135 } 1136 1137 int 1138 clear_mode(int bit) 1139 { 1140 return dolmmode(bit, 0); 1141 } 1142 1143 struct modelist { 1144 char *name; /* command name */ 1145 char *help; /* help string */ 1146 int (*handler) /* routine which executes command */ 1147 (int); 1148 int needconnect; /* Do we need to be connected to execute? */ 1149 int arg1; 1150 }; 1151 1152 static struct modelist ModeList[] = { 1153 { "character", "Disable LINEMODE option", docharmode, 1 }, 1154 #ifdef KLUDGELINEMODE 1155 { "", "(or disable obsolete line-by-line mode)", 0 }, 1156 #endif 1157 { "line", "Enable LINEMODE option", dolinemode, 1 }, 1158 #ifdef KLUDGELINEMODE 1159 { "", "(or enable obsolete line-by-line mode)", 0 }, 1160 #endif 1161 { "", "", 0 }, 1162 { "", "These require the LINEMODE option to be enabled", 0 }, 1163 { "isig", "Enable signal trapping", set_mode, 1, MODE_TRAPSIG }, 1164 { "+isig", 0, set_mode, 1, MODE_TRAPSIG }, 1165 { "-isig", "Disable signal trapping", clear_mode, 1, MODE_TRAPSIG }, 1166 { "edit", "Enable character editing", set_mode, 1, MODE_EDIT }, 1167 { "+edit", 0, set_mode, 1, MODE_EDIT }, 1168 { "-edit", "Disable character editing", clear_mode, 1, MODE_EDIT }, 1169 { "softtabs", "Enable tab expansion", set_mode, 1, MODE_SOFT_TAB }, 1170 { "+softtabs", 0, set_mode, 1, MODE_SOFT_TAB }, 1171 { "-softtabs", "Disable character editing", clear_mode, 1, MODE_SOFT_TAB }, 1172 { "litecho", "Enable literal character echo", set_mode, 1, MODE_LIT_ECHO }, 1173 { "+litecho", 0, set_mode, 1, MODE_LIT_ECHO }, 1174 { "-litecho", "Disable literal character echo", clear_mode, 1, MODE_LIT_ECHO }, 1175 { "help", 0, modehelp, 0 }, 1176 #ifdef KLUDGELINEMODE 1177 { "kludgeline", 0, dokludgemode, 1 }, 1178 #endif 1179 { "", "", 0 }, 1180 { "?", "Print help information", modehelp, 0 }, 1181 { 0 }, 1182 }; 1183 1184 1185 int 1186 modehelp(int n) 1187 { 1188 struct modelist *mt; 1189 1190 printf("format is: 'mode Mode', where 'Mode' is one of:\n\n"); 1191 for (mt = ModeList; mt->name; mt++) { 1192 if (mt->help) { 1193 if (*mt->help) 1194 printf("%-15s %s\n", mt->name, mt->help); 1195 else 1196 printf("\n"); 1197 } 1198 } 1199 return 0; 1200 } 1201 1202 #define GETMODECMD(name) (struct modelist *) \ 1203 genget(name, (char **) ModeList, sizeof(struct modelist)) 1204 1205 static int 1206 modecmd(int argc, char *argv[]) 1207 { 1208 struct modelist *mt; 1209 1210 if (argc != 2) { 1211 printf("'mode' command requires an argument\n"); 1212 printf("'mode ?' for help.\n"); 1213 } else if ((mt = GETMODECMD(argv[1])) == 0) { 1214 fprintf(stderr, "Unknown mode '%s' ('mode ?' for help).\n", argv[1]); 1215 } else if (Ambiguous(mt)) { 1216 fprintf(stderr, "Ambiguous mode '%s' ('mode ?' for help).\n", argv[1]); 1217 } else if (mt->needconnect && !connected) { 1218 printf("?Need to be connected first.\n"); 1219 printf("'mode ?' for help.\n"); 1220 } else if (mt->handler) { 1221 return (*mt->handler)(mt->arg1); 1222 } 1223 return 0; 1224 } 1225 1226 /* 1227 * The following data structures and routines implement the 1228 * "display" command. 1229 */ 1230 1231 static int 1232 display(int argc, char *argv[]) 1233 { 1234 struct togglelist *tl; 1235 struct setlist *sl; 1236 1237 #define dotog(tl) if (tl->variable && tl->actionexplanation) { \ 1238 if (*tl->variable) { \ 1239 printf("will"); \ 1240 } else { \ 1241 printf("won't"); \ 1242 } \ 1243 printf(" %s.\n", tl->actionexplanation); \ 1244 } 1245 1246 #define doset(sl) if (sl->name && *sl->name != ' ') { \ 1247 if (sl->handler == 0) \ 1248 printf("%-15s [%s]\n", sl->name, control(*sl->charp)); \ 1249 else \ 1250 printf("%-15s \"%s\"\n", sl->name, (char *)sl->charp); \ 1251 } 1252 1253 if (argc == 1) { 1254 for (tl = Togglelist; tl->name; tl++) { 1255 dotog(tl); 1256 } 1257 printf("\n"); 1258 for (sl = Setlist; sl->name; sl++) { 1259 doset(sl); 1260 } 1261 } else { 1262 int i; 1263 1264 for (i = 1; i < argc; i++) { 1265 sl = getset(argv[i]); 1266 tl = GETTOGGLE(argv[i]); 1267 if (Ambiguous(sl) || Ambiguous(tl)) { 1268 printf("?Ambiguous argument '%s'.\n", argv[i]); 1269 return 0; 1270 } else if (!sl && !tl) { 1271 printf("?Unknown argument '%s'.\n", argv[i]); 1272 return 0; 1273 } else { 1274 if (tl) { 1275 dotog(tl); 1276 } 1277 if (sl) { 1278 doset(sl); 1279 } 1280 } 1281 } 1282 } 1283 /*@*/optionstatus(); 1284 #ifdef ENCRYPTION 1285 EncryptStatus(); 1286 #endif /* ENCRYPTION */ 1287 return 1; 1288 #undef doset 1289 #undef dotog 1290 } 1291 1292 /* 1293 * The following are the data structures, and many of the routines, 1294 * relating to command processing. 1295 */ 1296 1297 /* 1298 * Set the escape character. 1299 */ 1300 static int 1301 setescape(int argc, char *argv[]) 1302 { 1303 char *arg; 1304 char buf[50]; 1305 1306 printf( 1307 "Deprecated usage - please use 'set escape%s%s' in the future.\n", 1308 (argc > 2)? " ":"", (argc > 2)? argv[1]: ""); 1309 if (argc > 2) 1310 arg = argv[1]; 1311 else { 1312 printf("new escape character: "); 1313 (void) fgets(buf, sizeof(buf), stdin); 1314 arg = buf; 1315 } 1316 if (arg[0] != '\0') 1317 escape = arg[0]; 1318 if (!In3270) { 1319 printf("Escape character is '%s'.\n", control(escape)); 1320 } 1321 (void) fflush(stdout); 1322 return 1; 1323 } 1324 1325 /*VARARGS*/ 1326 static int 1327 togcrmod(int argc, char *argv[]) 1328 { 1329 crmod = !crmod; 1330 printf("Deprecated usage - please use 'toggle crmod' in the future.\n"); 1331 printf("%s map carriage return on output.\n", crmod ? "Will" : "Won't"); 1332 (void) fflush(stdout); 1333 return 1; 1334 } 1335 1336 /*VARARGS*/ 1337 int 1338 suspend(int argc, char *argv[]) 1339 { 1340 setcommandmode(); 1341 { 1342 long oldrows, oldcols, newrows, newcols, err; 1343 1344 err = (TerminalWindowSize(&oldrows, &oldcols) == 0) ? 1 : 0; 1345 (void) kill(0, SIGTSTP); 1346 /* 1347 * If we didn't get the window size before the SUSPEND, but we 1348 * can get them now (?), then send the NAWS to make sure that 1349 * we are set up for the right window size. 1350 */ 1351 if (TerminalWindowSize(&newrows, &newcols) && connected && 1352 (err || ((oldrows != newrows) || (oldcols != newcols)))) { 1353 sendnaws(); 1354 } 1355 } 1356 /* reget parameters in case they were changed */ 1357 TerminalSaveState(); 1358 setconnmode(0); 1359 return 1; 1360 } 1361 1362 #ifndef TN3270 1363 /*ARGSUSED*/ 1364 int 1365 shell(int argc, char *argv[]) 1366 { 1367 long oldrows, oldcols, newrows, newcols, err; 1368 1369 #ifdef __GNUC__ 1370 (void) &err; /* XXX avoid GCC warning */ 1371 #endif 1372 1373 setcommandmode(); 1374 1375 err = (TerminalWindowSize(&oldrows, &oldcols) == 0) ? 1 : 0; 1376 switch(vfork()) { 1377 case -1: 1378 perror("Fork failed"); 1379 break; 1380 1381 case 0: 1382 { 1383 /* 1384 * Fire up the shell in the child. 1385 */ 1386 char *shellp, *shellname; 1387 1388 shellp = getenv("SHELL"); 1389 if (shellp == NULL) 1390 shellp = "/bin/sh"; 1391 if ((shellname = strrchr(shellp, '/')) == 0) 1392 shellname = shellp; 1393 else 1394 shellname++; 1395 if (argc > 1) 1396 execl(shellp, shellname, "-c", &saveline[1], 0); 1397 else 1398 execl(shellp, shellname, 0); 1399 perror("execl"); 1400 _exit(1); 1401 } 1402 default: 1403 (void)wait((int *)0); /* Wait for the shell to complete */ 1404 1405 if (TerminalWindowSize(&newrows, &newcols) && connected && 1406 (err || ((oldrows != newrows) || (oldcols != newcols)))) { 1407 sendnaws(); 1408 } 1409 break; 1410 } 1411 return 1; 1412 } 1413 #endif /* !defined(TN3270) */ 1414 1415 /*VARARGS*/ 1416 static int 1417 bye(int argc, char *argv[]) 1418 { 1419 extern int resettermname; 1420 1421 if (connected) { 1422 (void) shutdown(net, 2); 1423 printf("Connection closed.\n"); 1424 (void) NetClose(net); 1425 connected = 0; 1426 resettermname = 1; 1427 #if defined(AUTHENTICATION) || defined(ENCRYPTION) 1428 auth_encrypt_connect(connected); 1429 #endif /* defined(AUTHENTICATION) */ 1430 /* reset options */ 1431 tninit(); 1432 #ifdef TN3270 1433 SetIn3270(); /* Get out of 3270 mode */ 1434 #endif /* defined(TN3270) */ 1435 } 1436 if ((argc != 2) || (strcmp(argv[1], "fromquit") != 0)) { 1437 longjmp(toplevel, 1); 1438 /* NOTREACHED */ 1439 } 1440 return 1; /* Keep lint, etc., happy */ 1441 } 1442 1443 /*VARARGS*/ 1444 int 1445 quit(int argc, char *argv[]) 1446 { 1447 (void) call(bye, "bye", "fromquit", 0); 1448 Exit(0); 1449 /*NOTREACHED*/ 1450 } 1451 1452 /*VARARGS*/ 1453 int 1454 logout(int argc, char *argv[]) 1455 { 1456 send_do(TELOPT_LOGOUT, 1); 1457 (void) netflush(); 1458 return 1; 1459 } 1460 1461 1462 /* 1463 * The SLC command. 1464 */ 1465 1466 struct slclist { 1467 char *name; 1468 char *help; 1469 void (*handler)(int); 1470 int arg; 1471 }; 1472 1473 struct slclist SlcList[] = { 1474 { "export", "Use local special character definitions", 1475 slc_mode_export, 0 }, 1476 { "import", "Use remote special character definitions", 1477 slc_mode_import, 1 }, 1478 { "check", "Verify remote special character definitions", 1479 slc_mode_import, 0 }, 1480 { "help", 0, slc_help, 0 }, 1481 { "?", "Print help information", slc_help, 0 }, 1482 { 0 }, 1483 }; 1484 1485 static void 1486 slc_help(int n) 1487 { 1488 struct slclist *c; 1489 1490 for (c = SlcList; c->name; c++) { 1491 if (c->help) { 1492 if (*c->help) 1493 printf("%-15s %s\n", c->name, c->help); 1494 else 1495 printf("\n"); 1496 } 1497 } 1498 } 1499 1500 static struct slclist * 1501 getslc(char *name) 1502 { 1503 return (struct slclist *) 1504 genget(name, (char **) SlcList, sizeof(struct slclist)); 1505 } 1506 1507 static int 1508 slccmd(int argc, char *argv[]) 1509 { 1510 struct slclist *c; 1511 1512 if (argc != 2) { 1513 fprintf(stderr, 1514 "Need an argument to 'slc' command. 'slc ?' for help.\n"); 1515 return 0; 1516 } 1517 c = getslc(argv[1]); 1518 if (c == 0) { 1519 fprintf(stderr, "'%s': unknown argument ('slc ?' for help).\n", 1520 argv[1]); 1521 return 0; 1522 } 1523 if (Ambiguous(c)) { 1524 fprintf(stderr, "'%s': ambiguous argument ('slc ?' for help).\n", 1525 argv[1]); 1526 return 0; 1527 } 1528 (*c->handler)(c->arg); 1529 slcstate(); 1530 return 1; 1531 } 1532 1533 /* 1534 * The ENVIRON command. 1535 */ 1536 1537 struct envlist { 1538 char *name; 1539 char *help; 1540 struct env_lst *(*handler)(unsigned char *, unsigned char *); 1541 int narg; 1542 }; 1543 1544 struct envlist EnvList[] = { 1545 { "define", "Define an environment variable", 1546 env_define, 2 }, 1547 { "undefine", "Undefine an environment variable", 1548 env_undefine, 1 }, 1549 { "export", "Mark an environment variable for automatic export", 1550 env_export, 1 }, 1551 { "unexport", "Don't mark an environment variable for automatic export", 1552 env_unexport, 1 }, 1553 { "send", "Send an environment variable", env_send, 1 }, 1554 { "list", "List the current environment variables", 1555 env_list, 0 }, 1556 #if defined(OLD_ENVIRON) && defined(ENV_HACK) 1557 { "varval", "Reverse VAR and VALUE (auto, right, wrong, status)", 1558 env_varval, 1 }, 1559 #endif 1560 { "help", 0, env_help, 0 }, 1561 { "?", "Print help information", env_help, 0 }, 1562 { 0 }, 1563 }; 1564 1565 static struct env_lst * 1566 env_help( unsigned char *us1, unsigned char *us2) 1567 { 1568 struct envlist *c; 1569 1570 for (c = EnvList; c->name; c++) { 1571 if (c->help) { 1572 if (*c->help) 1573 printf("%-15s %s\n", c->name, c->help); 1574 else 1575 printf("\n"); 1576 } 1577 } 1578 return NULL; 1579 } 1580 1581 static struct envlist * 1582 getenvcmd(char *name) 1583 { 1584 return (struct envlist *) 1585 genget(name, (char **) EnvList, sizeof(struct envlist)); 1586 } 1587 1588 int 1589 env_cmd(int argc, char *argv[]) 1590 { 1591 struct envlist *c; 1592 1593 if (argc < 2) { 1594 fprintf(stderr, 1595 "Need an argument to 'environ' command. 'environ ?' for help.\n"); 1596 return 0; 1597 } 1598 c = getenvcmd(argv[1]); 1599 if (c == 0) { 1600 fprintf(stderr, "'%s': unknown argument ('environ ?' for help).\n", 1601 argv[1]); 1602 return 0; 1603 } 1604 if (Ambiguous(c)) { 1605 fprintf(stderr, "'%s': ambiguous argument ('environ ?' for help).\n", 1606 argv[1]); 1607 return 0; 1608 } 1609 if (c->narg + 2 != argc) { 1610 fprintf(stderr, 1611 "Need %s%d argument%s to 'environ %s' command. 'environ ?' for help.\n", 1612 c->narg < argc + 2 ? "only " : "", 1613 c->narg, c->narg == 1 ? "" : "s", c->name); 1614 return 0; 1615 } 1616 (*c->handler)(argv[2], argv[3]); 1617 return 1; 1618 } 1619 1620 struct env_lst { 1621 struct env_lst *next; /* pointer to next structure */ 1622 struct env_lst *prev; /* pointer to previous structure */ 1623 unsigned char *var; /* pointer to variable name */ 1624 unsigned char *value; /* pointer to variable value */ 1625 int export; /* 1 -> export with default list of variables */ 1626 int welldefined; /* A well defined variable */ 1627 }; 1628 1629 struct env_lst envlisthead; 1630 1631 struct env_lst * 1632 env_find(unsigned char *var) 1633 { 1634 struct env_lst *ep; 1635 1636 for (ep = envlisthead.next; ep; ep = ep->next) { 1637 if (strcmp((char *)ep->var, (char *)var) == 0) 1638 return(ep); 1639 } 1640 return(NULL); 1641 } 1642 1643 void 1644 env_init(void) 1645 { 1646 extern char **environ; 1647 char **epp, *cp; 1648 struct env_lst *ep; 1649 1650 for (epp = environ; *epp; epp++) { 1651 if ((cp = strchr(*epp, '=')) != NULL) { 1652 *cp = '\0'; 1653 ep = env_define((unsigned char *)*epp, 1654 (unsigned char *)cp+1); 1655 ep->export = 0; 1656 *cp = '='; 1657 } 1658 } 1659 /* 1660 * Special case for DISPLAY variable. If it is ":0.0" or 1661 * "unix:0.0", we have to get rid of "unix" and insert our 1662 * hostname. 1663 */ 1664 if ((ep = env_find("DISPLAY")) 1665 && ((*ep->value == ':') 1666 || (strncmp((char *)ep->value, "unix:", 5) == 0))) { 1667 char hbuf[MAXHOSTNAMELEN + 1]; 1668 char *cp2 = strchr((char *)ep->value, ':'); 1669 1670 gethostname(hbuf, sizeof hbuf); 1671 hbuf[sizeof(hbuf) - 1] = '\0'; 1672 cp = (char *)malloc(strlen(hbuf) + strlen(cp2) + 1); 1673 sprintf((char *)cp, "%s%s", hbuf, cp2); 1674 free(ep->value); 1675 ep->value = (unsigned char *)cp; 1676 } 1677 /* 1678 * If USER is not defined, but LOGNAME is, then add 1679 * USER with the value from LOGNAME. By default, we 1680 * don't export the USER variable. 1681 */ 1682 if ((env_find("USER") == NULL) && (ep = env_find("LOGNAME"))) { 1683 env_define((unsigned char *)"USER", ep->value); 1684 env_unexport((unsigned char *)"USER", NULL); 1685 } 1686 env_export((unsigned char *)"DISPLAY", NULL); 1687 env_export((unsigned char *)"PRINTER", NULL); 1688 } 1689 1690 struct env_lst * 1691 env_define(unsigned char *var, unsigned char *value) 1692 { 1693 struct env_lst *ep; 1694 1695 if ((ep = env_find(var)) != NULL) { 1696 if (ep->var) 1697 free(ep->var); 1698 if (ep->value) 1699 free(ep->value); 1700 } else { 1701 ep = (struct env_lst *)malloc(sizeof(struct env_lst)); 1702 ep->next = envlisthead.next; 1703 envlisthead.next = ep; 1704 ep->prev = &envlisthead; 1705 if (ep->next) 1706 ep->next->prev = ep; 1707 } 1708 ep->welldefined = opt_welldefined(var); 1709 ep->export = 1; 1710 ep->var = (unsigned char *)strdup((char *)var); 1711 ep->value = (unsigned char *)strdup((char *)value); 1712 return(ep); 1713 } 1714 1715 struct env_lst * 1716 env_undefine(unsigned char *var, unsigned char *d) 1717 { 1718 struct env_lst *ep; 1719 1720 if ((ep = env_find(var)) != NULL) { 1721 ep->prev->next = ep->next; 1722 if (ep->next) 1723 ep->next->prev = ep->prev; 1724 if (ep->var) 1725 free(ep->var); 1726 if (ep->value) 1727 free(ep->value); 1728 free(ep); 1729 } 1730 return NULL; 1731 } 1732 1733 struct env_lst * 1734 env_export(unsigned char *var, unsigned char *d) 1735 { 1736 struct env_lst *ep; 1737 1738 if ((ep = env_find(var)) != NULL) 1739 ep->export = 1; 1740 return NULL; 1741 } 1742 1743 struct env_lst * 1744 env_unexport(unsigned char *var, unsigned char *d) 1745 { 1746 struct env_lst *ep; 1747 1748 if ((ep = env_find(var)) != NULL) 1749 ep->export = 0; 1750 return NULL; 1751 } 1752 1753 struct env_lst * 1754 env_send(unsigned char *var, unsigned char *d) 1755 { 1756 struct env_lst *ep; 1757 1758 if (my_state_is_wont(TELOPT_NEW_ENVIRON) 1759 #ifdef OLD_ENVIRON 1760 && my_state_is_wont(TELOPT_OLD_ENVIRON) 1761 #endif 1762 ) { 1763 fprintf(stderr, 1764 "Cannot send '%s': Telnet ENVIRON option not enabled\n", 1765 var); 1766 return NULL; 1767 } 1768 ep = env_find(var); 1769 if (ep == 0) { 1770 fprintf(stderr, "Cannot send '%s': variable not defined\n", 1771 var); 1772 return NULL; 1773 } 1774 env_opt_start_info(); 1775 env_opt_add(ep->var); 1776 env_opt_end(0); 1777 return NULL; 1778 } 1779 1780 struct env_lst * 1781 env_list(unsigned char *d1, unsigned char *d2) 1782 { 1783 struct env_lst *ep; 1784 1785 for (ep = envlisthead.next; ep; ep = ep->next) { 1786 printf("%c %-20s %s\n", ep->export ? '*' : ' ', 1787 ep->var, ep->value); 1788 } 1789 return NULL; 1790 } 1791 1792 unsigned char * 1793 env_default(int init, int welldefined) 1794 { 1795 static struct env_lst *nep = NULL; 1796 1797 if (init) { 1798 nep = &envlisthead; 1799 return NULL; 1800 } 1801 if (nep) { 1802 while ((nep = nep->next) != NULL) { 1803 if (nep->export && (nep->welldefined == welldefined)) 1804 return(nep->var); 1805 } 1806 } 1807 return(NULL); 1808 } 1809 1810 unsigned char * 1811 env_getvalue(unsigned char *var) 1812 { 1813 struct env_lst *ep; 1814 1815 if ((ep = env_find(var)) != NULL) 1816 return(ep->value); 1817 return(NULL); 1818 } 1819 1820 #if defined(OLD_ENVIRON) && defined(ENV_HACK) 1821 void 1822 env_varval(unsigned char *what) 1823 { 1824 extern int old_env_var, old_env_value, env_auto; 1825 int len = strlen((char *)what); 1826 1827 if (len == 0) 1828 goto unknown; 1829 1830 if (strncasecmp((char *)what, "status", len) == 0) { 1831 if (env_auto) 1832 printf("%s%s", "VAR and VALUE are/will be ", 1833 "determined automatically\n"); 1834 if (old_env_var == OLD_ENV_VAR) 1835 printf("VAR and VALUE set to correct definitions\n"); 1836 else 1837 printf("VAR and VALUE definitions are reversed\n"); 1838 } else if (strncasecmp((char *)what, "auto", len) == 0) { 1839 env_auto = 1; 1840 old_env_var = OLD_ENV_VALUE; 1841 old_env_value = OLD_ENV_VAR; 1842 } else if (strncasecmp((char *)what, "right", len) == 0) { 1843 env_auto = 0; 1844 old_env_var = OLD_ENV_VAR; 1845 old_env_value = OLD_ENV_VALUE; 1846 } else if (strncasecmp((char *)what, "wrong", len) == 0) { 1847 env_auto = 0; 1848 old_env_var = OLD_ENV_VALUE; 1849 old_env_value = OLD_ENV_VAR; 1850 } else { 1851 unknown: 1852 printf("Unknown \"varval\" command. (\"auto\", \"right\", \"wrong\", \"status\")\n"); 1853 } 1854 } 1855 #endif 1856 1857 #ifdef AUTHENTICATION 1858 /* 1859 * The AUTHENTICATE command. 1860 */ 1861 1862 struct authlist { 1863 char *name; 1864 char *help; 1865 int (*handler)(char *); 1866 int narg; 1867 }; 1868 1869 struct authlist AuthList[] = { 1870 { "status", "Display current status of authentication information", 1871 auth_status, 0 }, 1872 { "disable", "Disable an authentication type ('auth disable ?' for more)", 1873 auth_disable, 1 }, 1874 { "enable", "Enable an authentication type ('auth enable ?' for more)", 1875 auth_enable, 1 }, 1876 { "help", 0, auth_help, 0 }, 1877 { "?", "Print help information", auth_help, 0 }, 1878 { 0 }, 1879 }; 1880 1881 static int 1882 auth_help(char *s) 1883 { 1884 struct authlist *c; 1885 1886 for (c = AuthList; c->name; c++) { 1887 if (c->help) { 1888 if (*c->help) 1889 printf("%-15s %s\n", c->name, c->help); 1890 else 1891 printf("\n"); 1892 } 1893 } 1894 return 0; 1895 } 1896 1897 int 1898 auth_cmd(int argc, char *argv[]) 1899 { 1900 struct authlist *c; 1901 1902 if (argc < 2) { 1903 fprintf(stderr, 1904 "Need an argument to 'auth' command. 'auth ?' for help.\n"); 1905 return 0; 1906 } 1907 1908 c = (struct authlist *) 1909 genget(argv[1], (char **) AuthList, sizeof(struct authlist)); 1910 if (c == 0) { 1911 fprintf(stderr, "'%s': unknown argument ('auth ?' for help).\n", 1912 argv[1]); 1913 return 0; 1914 } 1915 if (Ambiguous(c)) { 1916 fprintf(stderr, "'%s': ambiguous argument ('auth ?' for help).\n", 1917 argv[1]); 1918 return 0; 1919 } 1920 if (c->narg + 2 != argc) { 1921 fprintf(stderr, 1922 "Need %s%d argument%s to 'auth %s' command. 'auth ?' for help.\n", 1923 c->narg < argc + 2 ? "only " : "", 1924 c->narg, c->narg == 1 ? "" : "s", c->name); 1925 return 0; 1926 } 1927 return((*c->handler)(argv[2])); 1928 } 1929 #endif 1930 1931 #ifdef ENCRYPTION 1932 /* 1933 * The ENCRYPT command. 1934 */ 1935 1936 struct encryptlist { 1937 char *name; 1938 char *help; 1939 int (*handler)(char *, char *); 1940 int needconnect; 1941 int minarg; 1942 int maxarg; 1943 }; 1944 1945 static int 1946 EncryptHelp(char *, char *); 1947 typedef int (*encrypthandler)(char *, char *); 1948 1949 struct encryptlist EncryptList[] = { 1950 { "enable", "Enable encryption. ('encrypt enable ?' for more)", 1951 EncryptEnable, 1, 1, 2 }, 1952 { "disable", "Disable encryption. ('encrypt enable ?' for more)", 1953 EncryptDisable, 0, 1, 2 }, 1954 { "type", "Set encryption type. ('encrypt type ?' for more)", 1955 EncryptType, 0, 1, 1 }, 1956 { "start", "Start encryption. ('encrypt start ?' for more)", 1957 (encrypthandler) EncryptStart, 1, 0, 1 }, 1958 { "stop", "Stop encryption. ('encrypt stop ?' for more)", 1959 (encrypthandler) EncryptStop, 1, 0, 1 }, 1960 { "input", "Start encrypting the input stream", 1961 (encrypthandler) EncryptStartInput, 1, 0, 0 }, 1962 { "-input", "Stop encrypting the input stream", 1963 (encrypthandler) EncryptStopInput, 1, 0, 0 }, 1964 { "output", "Start encrypting the output stream", 1965 (encrypthandler) EncryptStartOutput, 1, 0, 0 }, 1966 { "-output", "Stop encrypting the output stream", 1967 (encrypthandler) EncryptStopOutput, 1, 0, 0 }, 1968 1969 { "status", "Display current status of authentication information", 1970 (encrypthandler) EncryptStatus, 0, 0, 0 }, 1971 { "help", 0, EncryptHelp, 0, 0, 0 }, 1972 { "?", "Print help information", EncryptHelp, 0, 0, 0 }, 1973 { 0 }, 1974 }; 1975 1976 static int 1977 EncryptHelp(char *s1, char *s2) 1978 { 1979 struct encryptlist *c; 1980 1981 for (c = EncryptList; c->name; c++) { 1982 if (c->help) { 1983 if (*c->help) 1984 printf("%-15s %s\n", c->name, c->help); 1985 else 1986 printf("\n"); 1987 } 1988 } 1989 return (0); 1990 } 1991 1992 int 1993 encrypt_cmd(int argc, char *argv[]) 1994 { 1995 struct encryptlist *c; 1996 1997 if (argc < 2) { 1998 fprintf(stderr, 1999 "Need an argument to 'encrypt' command. " 2000 "'encrypt ?' for help.\n"); 2001 return (0); 2002 } 2003 2004 c = (struct encryptlist *) 2005 genget(argv[1], (char **) EncryptList, sizeof(struct encryptlist)); 2006 if (c == NULL) { 2007 fprintf(stderr, 2008 "'%s': unknown argument ('encrypt ?' for help).\n", 2009 argv[1]); 2010 return (0); 2011 } 2012 if (Ambiguous(c)) { 2013 fprintf(stderr, 2014 "'%s': ambiguous argument ('encrypt ?' for help).\n", 2015 argv[1]); 2016 return (0); 2017 } 2018 argc -= 2; 2019 if (argc < c->minarg || argc > c->maxarg) { 2020 if (c->minarg == c->maxarg) { 2021 fprintf(stderr, "Need %s%d argument%s ", 2022 c->minarg < argc ? "only " : "", c->minarg, 2023 c->minarg == 1 ? "" : "s"); 2024 } else { 2025 fprintf(stderr, "Need %s%d-%d arguments ", 2026 c->maxarg < argc ? "only " : "", c->minarg, 2027 c->maxarg); 2028 } 2029 fprintf(stderr, 2030 "to 'encrypt %s' command. 'encrypt ?' for help.\n", 2031 c->name); 2032 return (0); 2033 } 2034 if (c->needconnect && !connected) { 2035 if (!(argc && (isprefix(argv[2], "help") || 2036 isprefix(argv[2], "?")))) { 2037 printf("?Need to be connected first.\n"); 2038 return (0); 2039 } 2040 } 2041 return ((*c->handler)(argv[2], argv[3])); 2042 } 2043 #endif /* ENCRYPTION */ 2044 2045 #ifdef TN3270 2046 static void 2047 filestuff(int fd) 2048 { 2049 int res; 2050 2051 setconnmode(0); 2052 res = fcntl(fd, F_GETOWN, 0); 2053 setcommandmode(); 2054 2055 if (res == -1) { 2056 perror("fcntl"); 2057 return; 2058 } 2059 printf("\tOwner is %d.\n", res); 2060 2061 setconnmode(0); 2062 res = fcntl(fd, F_GETFL, 0); 2063 setcommandmode(); 2064 2065 if (res == -1) { 2066 perror("fcntl"); 2067 return; 2068 } 2069 #ifdef notdef 2070 printf("\tFlags are 0x%x: %s\n", res, decodeflags(res)); 2071 #endif 2072 } 2073 #endif /* defined(TN3270) */ 2074 2075 /* 2076 * Print status about the connection. 2077 */ 2078 /*ARGSUSED*/ 2079 static int 2080 status(int argc, char *argv[]) 2081 { 2082 if (connected) { 2083 printf("Connected to %s.\n", hostname); 2084 if ((argc < 2) || strcmp(argv[1], "notmuch")) { 2085 int mode = getconnmode(); 2086 2087 if (my_want_state_is_will(TELOPT_LINEMODE)) { 2088 printf("Operating with LINEMODE option\n"); 2089 printf("%s line editing\n", (mode&MODE_EDIT) ? "Local" : "No"); 2090 printf("%s catching of signals\n", 2091 (mode&MODE_TRAPSIG) ? "Local" : "No"); 2092 slcstate(); 2093 #ifdef KLUDGELINEMODE 2094 } else if (kludgelinemode && my_want_state_is_dont(TELOPT_SGA)) { 2095 printf("Operating in obsolete linemode\n"); 2096 #endif 2097 } else { 2098 printf("Operating in single character mode\n"); 2099 if (localchars) 2100 printf("Catching signals locally\n"); 2101 } 2102 printf("%s character echo\n", (mode&MODE_ECHO) ? "Local" : "Remote"); 2103 if (my_want_state_is_will(TELOPT_LFLOW)) 2104 printf("%s flow control\n", (mode&MODE_FLOW) ? "Local" : "No"); 2105 #ifdef ENCRYPTION 2106 encrypt_display(); 2107 #endif /* ENCRYPTION */ 2108 } 2109 } else { 2110 printf("No connection.\n"); 2111 } 2112 # ifndef TN3270 2113 printf("Escape character is '%s'.\n", control(escape)); 2114 (void) fflush(stdout); 2115 # else /* !defined(TN3270) */ 2116 if ((!In3270) && ((argc < 2) || strcmp(argv[1], "notmuch"))) { 2117 printf("Escape character is '%s'.\n", control(escape)); 2118 } 2119 if ((argc >= 2) && !strcmp(argv[1], "everything")) { 2120 printf("SIGIO received %d time%s.\n", 2121 sigiocount, (sigiocount == 1)? "":"s"); 2122 if (In3270) { 2123 printf("Process ID %d, process group %d.\n", 2124 getpid(), getpgrp()); 2125 printf("Terminal input:\n"); 2126 filestuff(tin); 2127 printf("Terminal output:\n"); 2128 filestuff(tout); 2129 printf("Network socket:\n"); 2130 filestuff(net); 2131 } 2132 } 2133 if (In3270 && transcom) { 2134 printf("Transparent mode command is '%s'.\n", transcom); 2135 } 2136 (void) fflush(stdout); 2137 if (In3270) { 2138 return 0; 2139 } 2140 # endif /* defined(TN3270) */ 2141 return 1; 2142 } 2143 2144 /* 2145 * Function that gets called when SIGINFO is received. 2146 */ 2147 int 2148 ayt_status(void) 2149 { 2150 return call(status, "status", "notmuch", 0); 2151 } 2152 2153 static const char * 2154 sockaddr_ntop(struct sockaddr *sa) 2155 { 2156 static char addrbuf[NI_MAXHOST]; 2157 #ifdef NI_WITHSCOPEID 2158 const int niflags = NI_NUMERICHOST | NI_WITHSCOPEID; 2159 #else 2160 const int niflags = NI_NUMERICHOST; 2161 #endif 2162 2163 if (getnameinfo(sa, sa->sa_len, addrbuf, sizeof(addrbuf), 2164 NULL, 0, niflags) == 0) 2165 return addrbuf; 2166 else 2167 return NULL; 2168 } 2169 2170 #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC) 2171 static int setpolicy (int, struct addrinfo *, char *); 2172 2173 static int 2174 setpolicy(int net, struct addrinfo *res, char *policy) 2175 { 2176 char *buf; 2177 int level; 2178 int optname; 2179 2180 if (policy == NULL) 2181 return 0; 2182 2183 buf = ipsec_set_policy(policy, strlen(policy)); 2184 if (buf == NULL) { 2185 printf("%s\n", ipsec_strerror()); 2186 return -1; 2187 } 2188 level = res->ai_family == AF_INET ? IPPROTO_IP : IPPROTO_IPV6; 2189 optname = res->ai_family == AF_INET ? IP_IPSEC_POLICY : IPV6_IPSEC_POLICY; 2190 if (setsockopt(net, level, optname, buf, ipsec_get_policylen(buf)) < 0){ 2191 perror("setsockopt"); 2192 return -1; 2193 } 2194 2195 free(buf); 2196 return 0; 2197 } 2198 #endif 2199 2200 int 2201 tn(int argc, char *argv[]) 2202 { 2203 struct addrinfo hints, *res, *res0; 2204 char *cause = "telnet: unknown"; 2205 int error; 2206 #if defined(IP_OPTIONS) && defined(IPPROTO_IP) 2207 char *srp = 0; 2208 unsigned long srlen; 2209 int proto, opt; 2210 #endif 2211 char *cmd, *hostp = 0, *portp = 0; 2212 const char *user = 0; 2213 #ifdef __GNUC__ /* Avoid vfork clobbering */ 2214 (void) &user; 2215 #endif 2216 2217 if (connected) { 2218 printf("?Already connected to %s\n", hostname); 2219 return 0; 2220 } 2221 if (argc < 2) { 2222 (void) strlcpy(line, "open ", sizeof(line)); 2223 printf("(to) "); 2224 (void) fgets(&line[strlen(line)], sizeof(line) - strlen(line), stdin); 2225 makeargv(); 2226 argc = margc; 2227 argv = margv; 2228 } 2229 cmd = *argv; 2230 --argc; ++argv; 2231 while (argc) { 2232 if (strcmp(*argv, "help") == 0 || isprefix(*argv, "?")) 2233 goto usage; 2234 if (strcmp(*argv, "-l") == 0) { 2235 --argc; ++argv; 2236 if (argc == 0) 2237 goto usage; 2238 user = *argv++; 2239 --argc; 2240 continue; 2241 } 2242 if (strcmp(*argv, "-a") == 0) { 2243 --argc; ++argv; 2244 autologin = 1; 2245 continue; 2246 } 2247 if (hostp == 0) { 2248 hostp = *argv++; 2249 --argc; 2250 continue; 2251 } 2252 if (portp == 0) { 2253 portp = *argv++; 2254 --argc; 2255 continue; 2256 } 2257 usage: 2258 printf("usage: %s [-l user] [-a] host-name [port]\n", cmd); 2259 return 0; 2260 } 2261 if (hostp == 0) 2262 goto usage; 2263 2264 (void) strlcpy(_hostname, hostp, sizeof(_hostname)); 2265 if (hostp[0] == '@' || hostp[0] == '!') { 2266 char *p; 2267 hostname = NULL; 2268 for (p = hostp + 1; *p; p++) { 2269 if (*p == ',' || *p == '@') 2270 hostname = p; 2271 } 2272 if (hostname == NULL) { 2273 fprintf(stderr, "%s: bad source route specification\n", hostp); 2274 return 0; 2275 } 2276 *hostname++ = '\0'; 2277 } else 2278 hostname = hostp; 2279 2280 if (!portp) { 2281 telnetport = 1; 2282 portp = "telnet"; 2283 } else if (portp[0] == '-') { 2284 /* use telnet negotiation if port number/name preceded by minus sign */ 2285 telnetport = 1; 2286 portp++; 2287 } else 2288 telnetport = 0; 2289 2290 memset(&hints, 0, sizeof(hints)); 2291 hints.ai_family = family; 2292 hints.ai_socktype = SOCK_STREAM; 2293 hints.ai_protocol = 0; 2294 hints.ai_flags = AI_NUMERICHOST; /* avoid forward lookup */ 2295 error = getaddrinfo(hostname, portp, &hints, &res0); 2296 if (!error) { 2297 /* numeric */ 2298 if (doaddrlookup && 2299 getnameinfo(res0->ai_addr, res0->ai_addrlen, 2300 _hostname, sizeof(_hostname), NULL, 0, NI_NAMEREQD) == 0) 2301 ; /* okay */ 2302 else 2303 strlcpy(_hostname, hostname, sizeof(_hostname)); 2304 } else { 2305 /* FQDN - try again with forward DNS lookup */ 2306 memset(&hints, 0, sizeof(hints)); 2307 hints.ai_family = family; 2308 hints.ai_socktype = SOCK_STREAM; 2309 hints.ai_protocol = 0; 2310 hints.ai_flags = AI_CANONNAME; 2311 error = getaddrinfo(hostname, portp, &hints, &res0); 2312 if (error == EAI_SERVICE) { 2313 fprintf(stderr, "tcp/%s: unknown service\n", portp); 2314 return 0; 2315 } else if (error) { 2316 fprintf(stderr, "%s: %s\n", hostname, gai_strerror(error)); 2317 return 0; 2318 } 2319 if (res0->ai_canonname) 2320 (void)strlcpy(_hostname, res0->ai_canonname, sizeof(_hostname)); 2321 else 2322 (void)strlcpy(_hostname, hostname, sizeof(_hostname)); 2323 } 2324 hostname = _hostname; 2325 2326 net = -1; 2327 for (res = res0; res; res = res->ai_next) { 2328 printf("Trying %s...\n", sockaddr_ntop(res->ai_addr)); 2329 net = socket(res->ai_family, res->ai_socktype, res->ai_protocol); 2330 if (net < 0) { 2331 cause = "telnet: socket"; 2332 continue; 2333 } 2334 2335 if (debug && SetSockOpt(net, SOL_SOCKET, SO_DEBUG, 1) < 0) { 2336 perror("setsockopt (SO_DEBUG)"); 2337 } 2338 if (hostp[0] == '@' || hostp[0] == '!') { 2339 if ((srlen = sourceroute(res, hostp, &srp, &proto, &opt)) < 0) { 2340 (void) NetClose(net); 2341 net = -1; 2342 continue; 2343 } 2344 if (srp && setsockopt(net, proto, opt, srp, srlen) < 0) 2345 perror("setsockopt (source route)"); 2346 } 2347 2348 #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC) 2349 if (setpolicy(net, res, ipsec_policy_in) < 0) { 2350 (void) NetClose(net); 2351 net = -1; 2352 continue; 2353 } 2354 if (setpolicy(net, res, ipsec_policy_out) < 0) { 2355 (void) NetClose(net); 2356 net = -1; 2357 continue; 2358 } 2359 #endif 2360 2361 if (connect(net, res->ai_addr, res->ai_addrlen) < 0) { 2362 if (res->ai_next) { 2363 int oerrno = errno; 2364 2365 fprintf(stderr, "telnet: connect to address %s: ", 2366 sockaddr_ntop(res->ai_addr)); 2367 errno = oerrno; 2368 perror((char *)0); 2369 } 2370 cause = "telnet: Unable to connect to remote host"; 2371 (void) NetClose(net); 2372 net = -1; 2373 continue; 2374 } 2375 2376 connected++; 2377 #if defined(AUTHENTICATION) || defined(ENCRYPTION) 2378 auth_encrypt_connect(connected); 2379 #endif /* defined(AUTHENTICATION) || defined(ENCRYPTION) */ 2380 break; 2381 } 2382 freeaddrinfo(res0); 2383 if (net < 0 || connected == 0) { 2384 perror(cause); 2385 return 0; 2386 } 2387 2388 cmdrc(hostp, hostname); 2389 if (autologin && user == NULL) { 2390 struct passwd *pw; 2391 2392 user = getenv("USER"); 2393 if (user == NULL || 2394 ((pw = getpwnam(user)) && pw->pw_uid != getuid())) { 2395 if ((pw = getpwuid(getuid())) != NULL) 2396 user = pw->pw_name; 2397 else 2398 user = NULL; 2399 } 2400 } 2401 if (user) { 2402 env_define((unsigned char *)"USER", (unsigned char *)user); 2403 env_export((unsigned char *)"USER", NULL); 2404 } 2405 (void) call(status, "status", "notmuch", 0); 2406 if (setjmp(peerdied) == 0) 2407 telnet(user); 2408 (void) NetClose(net); 2409 ExitString("Connection closed by foreign host.\n",1); 2410 /*NOTREACHED*/ 2411 } 2412 2413 #define HELPINDENT ((int)sizeof ("connect")) 2414 2415 static char 2416 openhelp[] = "connect to a site", 2417 closehelp[] = "close current connection", 2418 logouthelp[] = "forcibly logout remote user and close the connection", 2419 quithelp[] = "exit telnet", 2420 statushelp[] = "print status information", 2421 helphelp[] = "print help information", 2422 sendhelp[] = "transmit special characters ('send ?' for more)", 2423 sethelp[] = "set operating parameters ('set ?' for more)", 2424 unsethelp[] = "unset operating parameters ('unset ?' for more)", 2425 togglestring[] ="toggle operating parameters ('toggle ?' for more)", 2426 slchelp[] = "change state of special charaters ('slc ?' for more)", 2427 displayhelp[] = "display operating parameters", 2428 #ifdef TN3270 2429 transcomhelp[] = "specify Unix command for transparent mode pipe", 2430 #endif /* defined(TN3270) */ 2431 #ifdef AUTHENTICATION 2432 authhelp[] = "turn on (off) authentication ('auth ?' for more)", 2433 #endif 2434 #ifdef ENCRYPTION 2435 encrypthelp[] = "turn on (off) encryption ('encrypt ?' for more)", 2436 #endif /* ENCRYPTION */ 2437 zhelp[] = "suspend telnet", 2438 shellhelp[] = "invoke a subshell", 2439 envhelp[] = "change environment variables ('environ ?' for more)", 2440 modestring[] = "try to enter line or character mode ('mode ?' for more)"; 2441 2442 static Command cmdtab[] = { 2443 { "close", closehelp, bye, 1 }, 2444 { "logout", logouthelp, logout, 1 }, 2445 { "display", displayhelp, display, 0 }, 2446 { "mode", modestring, modecmd, 0 }, 2447 { "open", openhelp, tn, 0 }, 2448 { "quit", quithelp, quit, 0 }, 2449 { "send", sendhelp, sendcmd, 0 }, 2450 { "set", sethelp, setcmd, 0 }, 2451 { "unset", unsethelp, unsetcmd, 0 }, 2452 { "status", statushelp, status, 0 }, 2453 { "toggle", togglestring, toggle, 0 }, 2454 { "slc", slchelp, slccmd, 0 }, 2455 #ifdef TN3270 2456 { "transcom", transcomhelp, settranscom, 0 }, 2457 #endif /* defined(TN3270) */ 2458 #ifdef AUTHENTICATION 2459 { "auth", authhelp, auth_cmd, 0 }, 2460 #endif 2461 #ifdef ENCRYPTION 2462 { "encrypt", encrypthelp, encrypt_cmd, 0 }, 2463 #endif 2464 { "z", zhelp, suspend, 0 }, 2465 #ifdef TN3270 2466 { "!", shellhelp, shell, 1 }, 2467 #else 2468 { "!", shellhelp, shell, 0 }, 2469 #endif 2470 { "environ", envhelp, env_cmd, 0 }, 2471 { "?", helphelp, help, 0 }, 2472 { NULL, NULL, NULL, 0 } 2473 }; 2474 2475 static char crmodhelp[] = "deprecated command -- use 'toggle crmod' instead"; 2476 static char escapehelp[] = "deprecated command -- use 'set escape' instead"; 2477 2478 static Command cmdtab2[] = { 2479 { "help", 0, help, 0 }, 2480 { "escape", escapehelp, setescape, 0 }, 2481 { "crmod", crmodhelp, togcrmod, 0 }, 2482 { NULL, NULL, NULL, 0 } 2483 }; 2484 2485 2486 /* 2487 * Call routine with argc, argv set from args (terminated by 0). 2488 */ 2489 2490 /*VARARGS1*/ 2491 static int 2492 call(intrtn_t routine, ...) 2493 { 2494 va_list ap; 2495 char *args[100]; 2496 int argno = 0; 2497 2498 va_start(ap, routine); 2499 while ((args[argno++] = va_arg(ap, char *)) != 0) { 2500 ; 2501 } 2502 va_end(ap); 2503 return (*routine)(argno-1, args); 2504 } 2505 2506 2507 static Command * 2508 getcmd(char *name) 2509 { 2510 Command *cm; 2511 2512 if ((cm = (Command *) genget(name, (char **) cmdtab, sizeof(Command))) != NULL) 2513 return cm; 2514 return (Command *) genget(name, (char **) cmdtab2, sizeof(Command)); 2515 } 2516 2517 void 2518 command(int top, char *tbuf, int cnt) 2519 { 2520 Command *c; 2521 2522 setcommandmode(); 2523 if (!top) { 2524 putchar('\n'); 2525 } else { 2526 (void) signal(SIGINT, SIG_DFL); 2527 (void) signal(SIGQUIT, SIG_DFL); 2528 } 2529 for (;;) { 2530 if (rlogin == _POSIX_VDISABLE) 2531 printf("%s> ", prompt); 2532 if (tbuf) { 2533 char *cp; 2534 cp = line; 2535 while (cnt > 0 && (*cp++ = *tbuf++) != '\n') 2536 cnt--; 2537 tbuf = 0; 2538 if (cp == line || *--cp != '\n' || cp == line) 2539 goto getline; 2540 *cp = '\0'; 2541 if (rlogin == _POSIX_VDISABLE) 2542 printf("%s\n", line); 2543 } else { 2544 getline: 2545 if (rlogin != _POSIX_VDISABLE) 2546 printf("%s> ", prompt); 2547 #ifdef TN3270 2548 fflush(stdout); 2549 #endif 2550 if (fgets(line, sizeof(line), stdin) == NULL) { 2551 if (feof(stdin) || ferror(stdin)) { 2552 (void) quit(0, NULL); 2553 /*NOTREACHED*/ 2554 } 2555 break; 2556 } 2557 } 2558 if (line[0] == 0) 2559 break; 2560 makeargv(); 2561 if (margv[0] == 0) { 2562 break; 2563 } 2564 c = getcmd(margv[0]); 2565 if (Ambiguous(c)) { 2566 printf("?Ambiguous command\n"); 2567 continue; 2568 } 2569 if (c == 0) { 2570 printf("?Invalid command\n"); 2571 continue; 2572 } 2573 if (c->needconnect && !connected) { 2574 printf("?Need to be connected first.\n"); 2575 continue; 2576 } 2577 if ((*c->handler)(margc, margv)) { 2578 break; 2579 } 2580 } 2581 if (!top) { 2582 if (!connected) { 2583 longjmp(toplevel, 1); 2584 /*NOTREACHED*/ 2585 } 2586 #ifdef TN3270 2587 if (shell_active == 0) { 2588 setconnmode(0); 2589 } 2590 #else /* defined(TN3270) */ 2591 setconnmode(0); 2592 #endif /* defined(TN3270) */ 2593 } 2594 } 2595 2596 /* 2597 * Help command. 2598 */ 2599 static int 2600 help(int argc, char *argv[]) 2601 { 2602 Command *c; 2603 2604 if (argc == 1) { 2605 printf("Commands may be abbreviated. Commands are:\n\n"); 2606 for (c = cmdtab; c->name; c++) 2607 if (c->help) { 2608 printf("%-*s\t%s\n", HELPINDENT, c->name, 2609 c->help); 2610 } 2611 return 0; 2612 } 2613 while (--argc > 0) { 2614 char *arg; 2615 arg = *++argv; 2616 c = getcmd(arg); 2617 if (Ambiguous(c)) 2618 printf("?Ambiguous help command %s\n", arg); 2619 else if (c == (Command *)0) 2620 printf("?Invalid help command %s\n", arg); 2621 else 2622 printf("%s\n", c->help); 2623 } 2624 return 0; 2625 } 2626 2627 static char *rcname = 0; 2628 static char rcbuf[128]; 2629 2630 void 2631 cmdrc(const char *m1, const char *m2) 2632 { 2633 Command *c; 2634 FILE *rcfile; 2635 int gotmachine = 0; 2636 int l1 = strlen(m1); 2637 int l2 = strlen(m2); 2638 char m1save[MAXHOSTNAMELEN + 1]; 2639 2640 if (skiprc) 2641 return; 2642 2643 strlcpy(m1save, m1, sizeof(m1save)); 2644 m1 = m1save; 2645 2646 if (rcname == 0) { 2647 rcname = getenv("HOME"); 2648 if (rcname) 2649 strlcpy(rcbuf, rcname, sizeof(rcbuf)); 2650 else 2651 rcbuf[0] = '\0'; 2652 strlcat(rcbuf, "/.telnetrc", sizeof(rcbuf)); 2653 rcname = rcbuf; 2654 } 2655 2656 if ((rcfile = fopen(rcname, "r")) == 0) { 2657 return; 2658 } 2659 2660 for (;;) { 2661 if (fgets(line, sizeof(line), rcfile) == NULL) 2662 break; 2663 if (line[0] == 0) 2664 break; 2665 if (line[0] == '#') 2666 continue; 2667 if (gotmachine) { 2668 if (!isspace((unsigned char)line[0])) 2669 gotmachine = 0; 2670 } 2671 if (gotmachine == 0) { 2672 if (isspace((unsigned char)line[0])) 2673 continue; 2674 if (strncasecmp(line, m1, l1) == 0) 2675 strncpy(line, &line[l1], sizeof(line) - l1); 2676 else if (strncasecmp(line, m2, l2) == 0) 2677 strncpy(line, &line[l2], sizeof(line) - l2); 2678 else if (strncasecmp(line, "DEFAULT", 7) == 0) 2679 strncpy(line, &line[7], sizeof(line) - 7); 2680 else 2681 continue; 2682 if (line[0] != ' ' && line[0] != '\t' && line[0] != '\n') 2683 continue; 2684 gotmachine = 1; 2685 } 2686 makeargv(); 2687 if (margv[0] == 0) 2688 continue; 2689 c = getcmd(margv[0]); 2690 if (Ambiguous(c)) { 2691 printf("?Ambiguous command: %s\n", margv[0]); 2692 continue; 2693 } 2694 if (c == 0) { 2695 printf("?Invalid command: %s\n", margv[0]); 2696 continue; 2697 } 2698 /* 2699 * This should never happen... 2700 */ 2701 if (c->needconnect && !connected) { 2702 printf("?Need to be connected first for %s.\n", margv[0]); 2703 continue; 2704 } 2705 (*c->handler)(margc, margv); 2706 } 2707 fclose(rcfile); 2708 } 2709 2710 /* 2711 * Source route is handed in as 2712 * [!]@hop1@hop2...@dst 2713 * 2714 * If the leading ! is present, it is a strict source route, otherwise it is 2715 * assmed to be a loose source route. Note that leading ! is effective 2716 * only for IPv4 case. 2717 * 2718 * We fill in the source route option as 2719 * hop1,hop2,hop3...dest 2720 * and return a pointer to hop1, which will 2721 * be the address to connect() to. 2722 * 2723 * Arguments: 2724 * ai: The address (by struct addrinfo) for the final destination. 2725 * 2726 * arg: Pointer to route list to decipher 2727 * 2728 * cpp: Pointer to a pointer, so that sourceroute() can return 2729 * the address of result buffer (statically alloc'ed). 2730 * 2731 * protop/optp: 2732 * Pointer to an integer. The pointed variable 2733 * lenp: pointer to an integer that contains the 2734 * length of *cpp if *cpp != NULL. 2735 * 2736 * Return values: 2737 * 2738 * Returns the length of the option pointed to by *cpp. If the 2739 * return value is -1, there was a syntax error in the 2740 * option, either arg contained unknown characters or too many hosts, 2741 * or hostname cannot be resolved. 2742 * 2743 * The caller needs to pass return value (len), *cpp, *protop and *optp 2744 * to setsockopt(2). 2745 * 2746 * *cpp: Points to the result buffer. The region is statically 2747 * allocated by the function. 2748 * 2749 * *protop: 2750 * protocol # to be passed to setsockopt(2). 2751 * 2752 * *optp: option # to be passed to setsockopt(2). 2753 * 2754 */ 2755 int 2756 sourceroute(struct addrinfo *ai, char *arg, char **cpp, int *protop, int *optp) 2757 { 2758 char *cp, *cp2, *lsrp, *lsrep; 2759 struct addrinfo hints, *res; 2760 int len, error; 2761 struct sockaddr_in *sin; 2762 char c; 2763 static char lsr[44]; 2764 #ifdef INET6 2765 struct cmsghdr *cmsg; 2766 struct sockaddr_in6 *sin6; 2767 static char rhbuf[1024]; 2768 #endif 2769 2770 /* 2771 * Verify the arguments. 2772 */ 2773 if (cpp == NULL) 2774 return -1; 2775 2776 cp = arg; 2777 2778 *cpp = NULL; 2779 2780 /* init these just in case.... */ 2781 lsrp = NULL; 2782 lsrep = NULL; 2783 #ifdef INET6 2784 cmsg = NULL; 2785 #endif 2786 2787 switch (ai->ai_family) { 2788 case AF_INET: 2789 lsrp = lsr; 2790 lsrep = lsrp + sizeof(lsr); 2791 2792 /* 2793 * Next, decide whether we have a loose source 2794 * route or a strict source route, and fill in 2795 * the begining of the option. 2796 */ 2797 if (*cp == '!') { 2798 cp++; 2799 *lsrp++ = IPOPT_SSRR; 2800 } else 2801 *lsrp++ = IPOPT_LSRR; 2802 if (*cp != '@') 2803 return -1; 2804 lsrp++; /* skip over length, we'll fill it in later */ 2805 *lsrp++ = 4; 2806 cp++; 2807 *protop = IPPROTO_IP; 2808 *optp = IP_OPTIONS; 2809 break; 2810 #ifdef INET6 2811 case AF_INET6: 2812 cmsg = inet6_rthdr_init(rhbuf, IPV6_RTHDR_TYPE_0); 2813 if (*cp != '@') 2814 return -1; 2815 cp++; 2816 *protop = IPPROTO_IPV6; 2817 *optp = IPV6_PKTOPTIONS; 2818 break; 2819 #endif 2820 default: 2821 return -1; 2822 } 2823 2824 memset(&hints, 0, sizeof(hints)); 2825 hints.ai_family = ai->ai_family; 2826 hints.ai_socktype = SOCK_STREAM; 2827 2828 for (c = 0;;) { 2829 if (c == ':') 2830 cp2 = 0; 2831 else for (cp2 = cp; (c = *cp2) != '\0'; cp2++) { 2832 if (c == ',') { 2833 *cp2++ = '\0'; 2834 if (*cp2 == '@') 2835 cp2++; 2836 } else if (c == '@') { 2837 *cp2++ = '\0'; 2838 } 2839 #if 0 /*colon conflicts with IPv6 address*/ 2840 else if (c == ':') { 2841 *cp2++ = '\0'; 2842 } 2843 #endif 2844 else 2845 continue; 2846 break; 2847 } 2848 if (!c) 2849 cp2 = 0; 2850 2851 error = getaddrinfo(cp, NULL, &hints, &res); 2852 if (error) { 2853 fprintf(stderr, "%s: %s\n", cp, gai_strerror(error)); 2854 return -1; 2855 } 2856 if (ai->ai_family != res->ai_family) { 2857 freeaddrinfo(res); 2858 return -1; 2859 } 2860 if (ai->ai_family == AF_INET) { 2861 /* 2862 * Check to make sure there is space for address 2863 */ 2864 if (lsrp + 4 > lsrep) { 2865 freeaddrinfo(res); 2866 return -1; 2867 } 2868 sin = (struct sockaddr_in *)res->ai_addr; 2869 memcpy(lsrp, &sin->sin_addr, sizeof(struct in_addr)); 2870 lsrp += sizeof(struct in_addr); 2871 } 2872 #ifdef INET6 2873 else if (ai->ai_family == AF_INET6) { 2874 sin6 = (struct sockaddr_in6 *)res->ai_addr; 2875 inet6_rthdr_add(cmsg, &sin6->sin6_addr, 2876 IPV6_RTHDR_LOOSE); 2877 } 2878 #endif 2879 else { 2880 freeaddrinfo(res); 2881 return -1; 2882 } 2883 freeaddrinfo(res); 2884 if (cp2) 2885 cp = cp2; 2886 else 2887 break; 2888 } 2889 if (ai->ai_family == AF_INET) { 2890 /* record the last hop */ 2891 if (lsrp + 4 > lsrep) 2892 return -1; 2893 sin = (struct sockaddr_in *)ai->ai_addr; 2894 memcpy(lsrp, &sin->sin_addr, sizeof(struct in_addr)); 2895 lsrp += sizeof(struct in_addr); 2896 lsr[IPOPT_OLEN] = lsrp - lsr; 2897 if (lsr[IPOPT_OLEN] <= 7 || lsr[IPOPT_OLEN] > 40) 2898 return -1; 2899 *lsrp++ = IPOPT_NOP; /*32bit word align*/ 2900 len = lsrp - lsr; 2901 *cpp = lsr; 2902 } 2903 #ifdef INET6 2904 else if (ai->ai_family == AF_INET6) { 2905 inet6_rthdr_lasthop(cmsg, IPV6_RTHDR_LOOSE); 2906 len = cmsg->cmsg_len; 2907 *cpp = rhbuf; 2908 } 2909 #endif 2910 else 2911 return -1; 2912 return len; 2913 } 2914