1 /* $NetBSD: commands.c,v 1.59 2004/03/20 23:26:05 heas 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 1.59 2004/03/20 23:26:05 heas 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 char *name; /* command name */ 113 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 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(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; 178 179 margc = 0; 180 cp = line; 181 if (*cp == '!') { /* Special case shell escape */ 182 strlcpy(saveline, line, sizeof(saveline)); /* save for shell command */ 183 *argp++ = "!"; /* No room in string to get this */ 184 margc++; 185 cp++; 186 } 187 while ((c = *cp) != '\0') { 188 int inquote = 0; 189 while (isspace((unsigned char)c)) 190 c = *++cp; 191 if (c == '\0') 192 break; 193 *argp++ = cp; 194 margc += 1; 195 for (cp2 = cp; c != '\0'; c = *++cp) { 196 if (inquote) { 197 if (c == inquote) { 198 inquote = 0; 199 continue; 200 } 201 } else { 202 if (c == '\\') { 203 if ((c = *++cp) == '\0') 204 break; 205 } else if (c == '"') { 206 inquote = '"'; 207 continue; 208 } else if (c == '\'') { 209 inquote = '\''; 210 continue; 211 } else if (isspace((unsigned char)c)) 212 break; 213 } 214 *cp2++ = c; 215 } 216 *cp2 = '\0'; 217 if (c == '\0') 218 break; 219 cp++; 220 } 221 *argp++ = 0; 222 } 223 224 /* 225 * Make a character string into a number. 226 * 227 * Todo: 1. Could take random integers (12, 0x12, 012, 0b1). 228 */ 229 230 static int 231 special(char *s) 232 { 233 char c; 234 char b; 235 236 switch (*s) { 237 case '^': 238 b = *++s; 239 if (b == '?') { 240 c = b | 0x40; /* DEL */ 241 } else { 242 c = b & 0x1f; 243 } 244 break; 245 default: 246 c = *s; 247 break; 248 } 249 return c; 250 } 251 252 /* 253 * Construct a control character sequence 254 * for a special character. 255 */ 256 static char * 257 control(cc_t c) 258 { 259 static char buf[5]; 260 /* 261 * The only way I could get the Sun 3.5 compiler 262 * to shut up about 263 * if ((unsigned int)c >= 0x80) 264 * was to assign "c" to an unsigned int variable... 265 * Arggg.... 266 */ 267 unsigned int uic = (unsigned int)c; 268 269 if (uic == 0x7f) 270 return ("^?"); 271 if (c == (cc_t)_POSIX_VDISABLE) { 272 return "off"; 273 } 274 if (uic >= 0x80) { 275 buf[0] = '\\'; 276 buf[1] = ((c>>6)&07) + '0'; 277 buf[2] = ((c>>3)&07) + '0'; 278 buf[3] = (c&07) + '0'; 279 buf[4] = 0; 280 } else if (uic >= 0x20) { 281 buf[0] = c; 282 buf[1] = 0; 283 } else { 284 buf[0] = '^'; 285 buf[1] = '@'+c; 286 buf[2] = 0; 287 } 288 return (buf); 289 } 290 291 292 293 /* 294 * The following are data structures and routines for 295 * the "send" command. 296 * 297 */ 298 299 struct sendlist { 300 char *name; /* How user refers to it (case independent) */ 301 char *help; /* Help information (0 ==> no help) */ 302 int needconnect; /* Need to be connected */ 303 int narg; /* Number of arguments */ 304 int (*handler) /* Routine to perform (for special ops) */ 305 (char *); 306 int nbyte; /* Number of bytes to send this command */ 307 int what; /* Character to be sent (<0 ==> special) */ 308 }; 309 310 311 static struct sendlist Sendlist[] = { 312 { "ao", "Send Telnet Abort output", 1, 0, 0, 2, AO }, 313 { "ayt", "Send Telnet 'Are You There'", 1, 0, 0, 2, AYT }, 314 { "brk", "Send Telnet Break", 1, 0, 0, 2, BREAK }, 315 { "break", 0, 1, 0, 0, 2, BREAK }, 316 { "ec", "Send Telnet Erase Character", 1, 0, 0, 2, EC }, 317 { "el", "Send Telnet Erase Line", 1, 0, 0, 2, EL }, 318 { "escape", "Send current escape character", 1, 0, send_esc, 1, 0 }, 319 { "ga", "Send Telnet 'Go Ahead' sequence", 1, 0, 0, 2, GA }, 320 { "ip", "Send Telnet Interrupt Process", 1, 0, 0, 2, IP }, 321 { "intp", 0, 1, 0, 0, 2, IP }, 322 { "interrupt", 0, 1, 0, 0, 2, IP }, 323 { "intr", 0, 1, 0, 0, 2, IP }, 324 { "nop", "Send Telnet 'No operation'", 1, 0, 0, 2, NOP }, 325 { "eor", "Send Telnet 'End of Record'", 1, 0, 0, 2, EOR }, 326 { "abort", "Send Telnet 'Abort Process'", 1, 0, 0, 2, ABORT }, 327 { "susp", "Send Telnet 'Suspend Process'", 1, 0, 0, 2, SUSP }, 328 { "eof", "Send Telnet End of File Character", 1, 0, 0, 2, xEOF }, 329 { "synch", "Perform Telnet 'Synch operation'", 1, 0, dosynch, 2, 0 }, 330 { "getstatus", "Send request for STATUS", 1, 0, get_status, 6, 0 }, 331 { "?", "Display send options", 0, 0, send_help, 0, 0 }, 332 { "help", 0, 0, 0, send_help, 0, 0 }, 333 { "do", 0, 0, 1, send_docmd, 3, 0 }, 334 { "dont", 0, 0, 1, send_dontcmd, 3, 0 }, 335 { "will", 0, 0, 1, send_willcmd, 3, 0 }, 336 { "wont", 0, 0, 1, send_wontcmd, 3, 0 }, 337 { 0 } 338 }; 339 340 #define GETSEND(name) ((struct sendlist *) genget(name, (char **) Sendlist, \ 341 sizeof(struct sendlist))) 342 343 static int 344 sendcmd(int argc, char **argv) 345 { 346 int count; /* how many bytes we are going to need to send */ 347 int i; 348 struct sendlist *s; /* pointer to current command */ 349 int success = 0; 350 int needconnect = 0; 351 352 if (argc < 2) { 353 printf("need at least one argument for 'send' command\n"); 354 printf("'send ?' for help\n"); 355 return 0; 356 } 357 /* 358 * First, validate all the send arguments. 359 * In addition, we see how much space we are going to need, and 360 * whether or not we will be doing a "SYNCH" operation (which 361 * flushes the network queue). 362 */ 363 count = 0; 364 for (i = 1; i < argc; i++) { 365 s = GETSEND(argv[i]); 366 if (s == 0) { 367 printf("Unknown send argument '%s'\n'send ?' for help.\n", 368 argv[i]); 369 return 0; 370 } else if (Ambiguous(s)) { 371 printf("Ambiguous send argument '%s'\n'send ?' for help.\n", 372 argv[i]); 373 return 0; 374 } 375 if (i + s->narg >= argc) { 376 fprintf(stderr, 377 "Need %d argument%s to 'send %s' command. 'send %s ?' for help.\n", 378 s->narg, s->narg == 1 ? "" : "s", s->name, s->name); 379 return 0; 380 } 381 count += s->nbyte; 382 if (s->handler == send_help) { 383 send_help(NULL); 384 return 0; 385 } 386 387 i += s->narg; 388 needconnect += s->needconnect; 389 } 390 if (!connected && needconnect) { 391 printf("?Need to be connected first.\n"); 392 printf("'send ?' for help\n"); 393 return 0; 394 } 395 /* Now, do we have enough room? */ 396 if (NETROOM() < count) { 397 printf("There is not enough room in the buffer TO the network\n"); 398 printf("to process your request. Nothing will be done.\n"); 399 printf("('send synch' will throw away most data in the network\n"); 400 printf("buffer, if this might help.)\n"); 401 return 0; 402 } 403 /* OK, they are all OK, now go through again and actually send */ 404 count = 0; 405 for (i = 1; i < argc; i++) { 406 if ((s = GETSEND(argv[i])) == 0) { 407 fprintf(stderr, "Telnet 'send' error - argument disappeared!\n"); 408 (void) quit(0, NULL); 409 /*NOTREACHED*/ 410 } 411 if (s->handler) { 412 count++; 413 success += (*s->handler)(argv[i+1]); 414 i += s->narg; 415 } else { 416 NET2ADD(IAC, s->what); 417 printoption("SENT", IAC, s->what); 418 } 419 } 420 return (count == success); 421 } 422 423 static int 424 send_esc(char *s) 425 { 426 NETADD(escape); 427 return 1; 428 } 429 430 static int 431 send_docmd(char *name) 432 { 433 return(send_tncmd(send_do, "do", name)); 434 } 435 436 static int 437 send_dontcmd(char *name) 438 { 439 return(send_tncmd(send_dont, "dont", name)); 440 } 441 static int 442 send_willcmd(char *name) 443 { 444 return(send_tncmd(send_will, "will", name)); 445 } 446 static int 447 send_wontcmd(char *name) 448 { 449 return(send_tncmd(send_wont, "wont", name)); 450 } 451 452 int 453 send_tncmd(void (*func)(int, int), char *cmd, char *name) 454 { 455 char **cpp; 456 extern char *telopts[]; 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 = (char **)genget(name, 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, 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 char *name; /* name of toggle */ 658 char *help; /* help message */ 659 int (*handler) /* routine to do actual setting */ 660 (int); 661 int *variable; 662 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 }, /* 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 &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 }, 786 { "help", 787 0, 788 togglehelp }, 789 { 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 = { 0 }; 875 876 struct setlist { 877 char *name; /* name */ 878 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 { " ", "" }, 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 { " ", "" }, 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 { 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 char *name; /* command name */ 1141 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 }, 1150 #ifdef KLUDGELINEMODE 1151 { "", "(or disable obsolete line-by-line mode)", 0 }, 1152 #endif 1153 { "line", "Enable LINEMODE option", dolinemode, 1 }, 1154 #ifdef KLUDGELINEMODE 1155 { "", "(or enable obsolete line-by-line mode)", 0 }, 1156 #endif 1157 { "", "", 0 }, 1158 { "", "These require the LINEMODE option to be enabled", 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 }, 1172 #ifdef KLUDGELINEMODE 1173 { "kludgeline", 0, dokludgemode, 1 }, 1174 #endif 1175 { "", "", 0 }, 1176 { "?", "Print help information", modehelp, 0 }, 1177 { 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, err; 1364 1365 #ifdef __GNUC__ 1366 (void) &err; /* XXX avoid GCC warning */ 1367 #endif 1368 1369 setcommandmode(); 1370 1371 err = (TerminalWindowSize(&oldrows, &oldcols) == 0) ? 1 : 0; 1372 switch(vfork()) { 1373 case -1: 1374 perror("Fork failed"); 1375 break; 1376 1377 case 0: 1378 { 1379 /* 1380 * Fire up the shell in the child. 1381 */ 1382 char *shellp, *shellname; 1383 1384 shellp = getenv("SHELL"); 1385 if (shellp == NULL) 1386 shellp = "/bin/sh"; 1387 if ((shellname = strrchr(shellp, '/')) == 0) 1388 shellname = shellp; 1389 else 1390 shellname++; 1391 if (argc > 1) 1392 execl(shellp, shellname, "-c", &saveline[1], 0); 1393 else 1394 execl(shellp, shellname, 0); 1395 perror("execl"); 1396 _exit(1); 1397 } 1398 default: 1399 (void)wait((int *)0); /* Wait for the shell to complete */ 1400 1401 if (TerminalWindowSize(&newrows, &newcols) && connected && 1402 (err || ((oldrows != newrows) || (oldcols != newcols)))) { 1403 sendnaws(); 1404 } 1405 break; 1406 } 1407 return 1; 1408 } 1409 #endif /* !defined(TN3270) */ 1410 1411 /*VARARGS*/ 1412 static int 1413 bye(int argc, char *argv[]) 1414 { 1415 extern int resettermname; 1416 1417 if (connected) { 1418 (void) shutdown(net, 2); 1419 printf("Connection closed.\n"); 1420 (void) NetClose(net); 1421 connected = 0; 1422 resettermname = 1; 1423 #if defined(AUTHENTICATION) || defined(ENCRYPTION) 1424 auth_encrypt_connect(connected); 1425 #endif /* defined(AUTHENTICATION) */ 1426 /* reset options */ 1427 tninit(); 1428 #ifdef TN3270 1429 SetIn3270(); /* Get out of 3270 mode */ 1430 #endif /* defined(TN3270) */ 1431 } 1432 if ((argc != 2) || (strcmp(argv[1], "fromquit") != 0)) { 1433 longjmp(toplevel, 1); 1434 /* NOTREACHED */ 1435 } 1436 return 1; /* Keep lint, etc., happy */ 1437 } 1438 1439 /*VARARGS*/ 1440 int 1441 quit(int argc, char *argv[]) 1442 { 1443 (void) call(bye, "bye", "fromquit", 0); 1444 Exit(0); 1445 /*NOTREACHED*/ 1446 } 1447 1448 /*VARARGS*/ 1449 int 1450 logout(int argc, char *argv[]) 1451 { 1452 send_do(TELOPT_LOGOUT, 1); 1453 (void) netflush(); 1454 return 1; 1455 } 1456 1457 1458 /* 1459 * The SLC command. 1460 */ 1461 1462 struct slclist { 1463 char *name; 1464 char *help; 1465 void (*handler)(int); 1466 int arg; 1467 }; 1468 1469 struct slclist SlcList[] = { 1470 { "export", "Use local special character definitions", 1471 slc_mode_export, 0 }, 1472 { "import", "Use remote special character definitions", 1473 slc_mode_import, 1 }, 1474 { "check", "Verify remote special character definitions", 1475 slc_mode_import, 0 }, 1476 { "help", 0, slc_help, 0 }, 1477 { "?", "Print help information", slc_help, 0 }, 1478 { 0 }, 1479 }; 1480 1481 static void 1482 slc_help(int n) 1483 { 1484 struct slclist *c; 1485 1486 for (c = SlcList; c->name; c++) { 1487 if (c->help) { 1488 if (*c->help) 1489 printf("%-15s %s\n", c->name, c->help); 1490 else 1491 printf("\n"); 1492 } 1493 } 1494 } 1495 1496 static struct slclist * 1497 getslc(char *name) 1498 { 1499 return (struct slclist *) 1500 genget(name, (char **) SlcList, sizeof(struct slclist)); 1501 } 1502 1503 static int 1504 slccmd(int argc, char *argv[]) 1505 { 1506 struct slclist *c; 1507 1508 if (argc != 2) { 1509 fprintf(stderr, 1510 "Need an argument to 'slc' command. 'slc ?' for help.\n"); 1511 return 0; 1512 } 1513 c = getslc(argv[1]); 1514 if (c == 0) { 1515 fprintf(stderr, "'%s': unknown argument ('slc ?' for help).\n", 1516 argv[1]); 1517 return 0; 1518 } 1519 if (Ambiguous(c)) { 1520 fprintf(stderr, "'%s': ambiguous argument ('slc ?' for help).\n", 1521 argv[1]); 1522 return 0; 1523 } 1524 (*c->handler)(c->arg); 1525 slcstate(); 1526 return 1; 1527 } 1528 1529 /* 1530 * The ENVIRON command. 1531 */ 1532 1533 struct envlist { 1534 char *name; 1535 char *help; 1536 struct env_lst *(*handler)(unsigned char *, unsigned char *); 1537 int narg; 1538 }; 1539 1540 struct envlist EnvList[] = { 1541 { "define", "Define an environment variable", 1542 env_define, 2 }, 1543 { "undefine", "Undefine an environment variable", 1544 env_undefine, 1 }, 1545 { "export", "Mark an environment variable for automatic export", 1546 env_export, 1 }, 1547 { "unexport", "Don't mark an environment variable for automatic export", 1548 env_unexport, 1 }, 1549 { "send", "Send an environment variable", env_send, 1 }, 1550 { "list", "List the current environment variables", 1551 env_list, 0 }, 1552 #if defined(OLD_ENVIRON) && defined(ENV_HACK) 1553 { "varval", "Reverse VAR and VALUE (auto, right, wrong, status)", 1554 env_varval, 1 }, 1555 #endif 1556 { "help", 0, env_help, 0 }, 1557 { "?", "Print help information", env_help, 0 }, 1558 { 0 }, 1559 }; 1560 1561 static struct env_lst * 1562 env_help( unsigned char *us1, unsigned char *us2) 1563 { 1564 struct envlist *c; 1565 1566 for (c = EnvList; c->name; c++) { 1567 if (c->help) { 1568 if (*c->help) 1569 printf("%-15s %s\n", c->name, c->help); 1570 else 1571 printf("\n"); 1572 } 1573 } 1574 return NULL; 1575 } 1576 1577 static struct envlist * 1578 getenvcmd(char *name) 1579 { 1580 return (struct envlist *) 1581 genget(name, (char **) EnvList, sizeof(struct envlist)); 1582 } 1583 1584 int 1585 env_cmd(int argc, char *argv[]) 1586 { 1587 struct envlist *c; 1588 1589 if (argc < 2) { 1590 fprintf(stderr, 1591 "Need an argument to 'environ' command. 'environ ?' for help.\n"); 1592 return 0; 1593 } 1594 c = getenvcmd(argv[1]); 1595 if (c == 0) { 1596 fprintf(stderr, "'%s': unknown argument ('environ ?' for help).\n", 1597 argv[1]); 1598 return 0; 1599 } 1600 if (Ambiguous(c)) { 1601 fprintf(stderr, "'%s': ambiguous argument ('environ ?' for help).\n", 1602 argv[1]); 1603 return 0; 1604 } 1605 if (c->narg + 2 != argc) { 1606 fprintf(stderr, 1607 "Need %s%d argument%s to 'environ %s' command. 'environ ?' for help.\n", 1608 c->narg < argc + 2 ? "only " : "", 1609 c->narg, c->narg == 1 ? "" : "s", c->name); 1610 return 0; 1611 } 1612 (*c->handler)(argv[2], argv[3]); 1613 return 1; 1614 } 1615 1616 struct env_lst { 1617 struct env_lst *next; /* pointer to next structure */ 1618 struct env_lst *prev; /* pointer to previous structure */ 1619 unsigned char *var; /* pointer to variable name */ 1620 unsigned char *value; /* pointer to variable value */ 1621 int export; /* 1 -> export with default list of variables */ 1622 int welldefined; /* A well defined variable */ 1623 }; 1624 1625 struct env_lst envlisthead; 1626 1627 struct env_lst * 1628 env_find(unsigned char *var) 1629 { 1630 struct env_lst *ep; 1631 1632 for (ep = envlisthead.next; ep; ep = ep->next) { 1633 if (strcmp((char *)ep->var, (char *)var) == 0) 1634 return(ep); 1635 } 1636 return(NULL); 1637 } 1638 1639 void 1640 env_init(void) 1641 { 1642 extern char **environ; 1643 char **epp, *cp; 1644 struct env_lst *ep; 1645 1646 for (epp = environ; *epp; epp++) { 1647 if ((cp = strchr(*epp, '=')) != NULL) { 1648 *cp = '\0'; 1649 ep = env_define((unsigned char *)*epp, 1650 (unsigned char *)cp+1); 1651 ep->export = 0; 1652 *cp = '='; 1653 } 1654 } 1655 /* 1656 * Special case for DISPLAY variable. If it is ":0.0" or 1657 * "unix:0.0", we have to get rid of "unix" and insert our 1658 * hostname. 1659 */ 1660 if ((ep = env_find("DISPLAY")) 1661 && ((*ep->value == ':') 1662 || (strncmp((char *)ep->value, "unix:", 5) == 0))) { 1663 char hbuf[MAXHOSTNAMELEN + 1]; 1664 char *cp2 = strchr((char *)ep->value, ':'); 1665 1666 gethostname(hbuf, sizeof hbuf); 1667 hbuf[sizeof(hbuf) - 1] = '\0'; 1668 cp = (char *)malloc(strlen(hbuf) + strlen(cp2) + 1); 1669 sprintf((char *)cp, "%s%s", hbuf, cp2); 1670 free(ep->value); 1671 ep->value = (unsigned char *)cp; 1672 } 1673 /* 1674 * If USER is not defined, but LOGNAME is, then add 1675 * USER with the value from LOGNAME. By default, we 1676 * don't export the USER variable. 1677 */ 1678 if ((env_find("USER") == NULL) && (ep = env_find("LOGNAME"))) { 1679 env_define((unsigned char *)"USER", ep->value); 1680 env_unexport((unsigned char *)"USER", NULL); 1681 } 1682 env_export((unsigned char *)"DISPLAY", NULL); 1683 env_export((unsigned char *)"PRINTER", NULL); 1684 } 1685 1686 struct env_lst * 1687 env_define(unsigned char *var, unsigned char *value) 1688 { 1689 struct env_lst *ep; 1690 1691 if ((ep = env_find(var)) != NULL) { 1692 if (ep->var) 1693 free(ep->var); 1694 if (ep->value) 1695 free(ep->value); 1696 } else { 1697 ep = (struct env_lst *)malloc(sizeof(struct env_lst)); 1698 ep->next = envlisthead.next; 1699 envlisthead.next = ep; 1700 ep->prev = &envlisthead; 1701 if (ep->next) 1702 ep->next->prev = ep; 1703 } 1704 ep->welldefined = opt_welldefined(var); 1705 ep->export = 1; 1706 ep->var = (unsigned char *)strdup((char *)var); 1707 ep->value = (unsigned char *)strdup((char *)value); 1708 return(ep); 1709 } 1710 1711 struct env_lst * 1712 env_undefine(unsigned char *var, unsigned char *d) 1713 { 1714 struct env_lst *ep; 1715 1716 if ((ep = env_find(var)) != NULL) { 1717 ep->prev->next = ep->next; 1718 if (ep->next) 1719 ep->next->prev = ep->prev; 1720 if (ep->var) 1721 free(ep->var); 1722 if (ep->value) 1723 free(ep->value); 1724 free(ep); 1725 } 1726 return NULL; 1727 } 1728 1729 struct env_lst * 1730 env_export(unsigned char *var, unsigned char *d) 1731 { 1732 struct env_lst *ep; 1733 1734 if ((ep = env_find(var)) != NULL) 1735 ep->export = 1; 1736 return NULL; 1737 } 1738 1739 struct env_lst * 1740 env_unexport(unsigned char *var, unsigned char *d) 1741 { 1742 struct env_lst *ep; 1743 1744 if ((ep = env_find(var)) != NULL) 1745 ep->export = 0; 1746 return NULL; 1747 } 1748 1749 struct env_lst * 1750 env_send(unsigned char *var, unsigned char *d) 1751 { 1752 struct env_lst *ep; 1753 1754 if (my_state_is_wont(TELOPT_NEW_ENVIRON) 1755 #ifdef OLD_ENVIRON 1756 && my_state_is_wont(TELOPT_OLD_ENVIRON) 1757 #endif 1758 ) { 1759 fprintf(stderr, 1760 "Cannot send '%s': Telnet ENVIRON option not enabled\n", 1761 var); 1762 return NULL; 1763 } 1764 ep = env_find(var); 1765 if (ep == 0) { 1766 fprintf(stderr, "Cannot send '%s': variable not defined\n", 1767 var); 1768 return NULL; 1769 } 1770 env_opt_start_info(); 1771 env_opt_add(ep->var); 1772 env_opt_end(0); 1773 return NULL; 1774 } 1775 1776 struct env_lst * 1777 env_list(unsigned char *d1, unsigned char *d2) 1778 { 1779 struct env_lst *ep; 1780 1781 for (ep = envlisthead.next; ep; ep = ep->next) { 1782 printf("%c %-20s %s\n", ep->export ? '*' : ' ', 1783 ep->var, ep->value); 1784 } 1785 return NULL; 1786 } 1787 1788 unsigned char * 1789 env_default(int init, int welldefined) 1790 { 1791 static struct env_lst *nep = NULL; 1792 1793 if (init) { 1794 nep = &envlisthead; 1795 return NULL; 1796 } 1797 if (nep) { 1798 while ((nep = nep->next) != NULL) { 1799 if (nep->export && (nep->welldefined == welldefined)) 1800 return(nep->var); 1801 } 1802 } 1803 return(NULL); 1804 } 1805 1806 unsigned char * 1807 env_getvalue(unsigned char *var) 1808 { 1809 struct env_lst *ep; 1810 1811 if ((ep = env_find(var)) != NULL) 1812 return(ep->value); 1813 return(NULL); 1814 } 1815 1816 #if defined(OLD_ENVIRON) && defined(ENV_HACK) 1817 void 1818 env_varval(unsigned char *what) 1819 { 1820 extern int old_env_var, old_env_value, env_auto; 1821 int len = strlen((char *)what); 1822 1823 if (len == 0) 1824 goto unknown; 1825 1826 if (strncasecmp((char *)what, "status", len) == 0) { 1827 if (env_auto) 1828 printf("%s%s", "VAR and VALUE are/will be ", 1829 "determined automatically\n"); 1830 if (old_env_var == OLD_ENV_VAR) 1831 printf("VAR and VALUE set to correct definitions\n"); 1832 else 1833 printf("VAR and VALUE definitions are reversed\n"); 1834 } else if (strncasecmp((char *)what, "auto", len) == 0) { 1835 env_auto = 1; 1836 old_env_var = OLD_ENV_VALUE; 1837 old_env_value = OLD_ENV_VAR; 1838 } else if (strncasecmp((char *)what, "right", len) == 0) { 1839 env_auto = 0; 1840 old_env_var = OLD_ENV_VAR; 1841 old_env_value = OLD_ENV_VALUE; 1842 } else if (strncasecmp((char *)what, "wrong", len) == 0) { 1843 env_auto = 0; 1844 old_env_var = OLD_ENV_VALUE; 1845 old_env_value = OLD_ENV_VAR; 1846 } else { 1847 unknown: 1848 printf("Unknown \"varval\" command. (\"auto\", \"right\", \"wrong\", \"status\")\n"); 1849 } 1850 } 1851 #endif 1852 1853 #ifdef AUTHENTICATION 1854 /* 1855 * The AUTHENTICATE command. 1856 */ 1857 1858 struct authlist { 1859 char *name; 1860 char *help; 1861 int (*handler)(char *); 1862 int narg; 1863 }; 1864 1865 struct authlist AuthList[] = { 1866 { "status", "Display current status of authentication information", 1867 auth_status, 0 }, 1868 { "disable", "Disable an authentication type ('auth disable ?' for more)", 1869 auth_disable, 1 }, 1870 { "enable", "Enable an authentication type ('auth enable ?' for more)", 1871 auth_enable, 1 }, 1872 { "help", 0, auth_help, 0 }, 1873 { "?", "Print help information", auth_help, 0 }, 1874 { 0 }, 1875 }; 1876 1877 static int 1878 auth_help(char *s) 1879 { 1880 struct authlist *c; 1881 1882 for (c = AuthList; c->name; c++) { 1883 if (c->help) { 1884 if (*c->help) 1885 printf("%-15s %s\n", c->name, c->help); 1886 else 1887 printf("\n"); 1888 } 1889 } 1890 return 0; 1891 } 1892 1893 int 1894 auth_cmd(int argc, char *argv[]) 1895 { 1896 struct authlist *c; 1897 1898 if (argc < 2) { 1899 fprintf(stderr, 1900 "Need an argument to 'auth' command. 'auth ?' for help.\n"); 1901 return 0; 1902 } 1903 1904 c = (struct authlist *) 1905 genget(argv[1], (char **) AuthList, sizeof(struct authlist)); 1906 if (c == 0) { 1907 fprintf(stderr, "'%s': unknown argument ('auth ?' for help).\n", 1908 argv[1]); 1909 return 0; 1910 } 1911 if (Ambiguous(c)) { 1912 fprintf(stderr, "'%s': ambiguous argument ('auth ?' for help).\n", 1913 argv[1]); 1914 return 0; 1915 } 1916 if (c->narg + 2 != argc) { 1917 fprintf(stderr, 1918 "Need %s%d argument%s to 'auth %s' command. 'auth ?' for help.\n", 1919 c->narg < argc + 2 ? "only " : "", 1920 c->narg, c->narg == 1 ? "" : "s", c->name); 1921 return 0; 1922 } 1923 return((*c->handler)(argv[2])); 1924 } 1925 #endif 1926 1927 #ifdef ENCRYPTION 1928 /* 1929 * The ENCRYPT command. 1930 */ 1931 1932 struct encryptlist { 1933 char *name; 1934 char *help; 1935 int (*handler)(char *, char *); 1936 int needconnect; 1937 int minarg; 1938 int maxarg; 1939 }; 1940 1941 static int 1942 EncryptHelp(char *, char *); 1943 typedef int (*encrypthandler)(char *, char *); 1944 1945 struct encryptlist EncryptList[] = { 1946 { "enable", "Enable encryption. ('encrypt enable ?' for more)", 1947 EncryptEnable, 1, 1, 2 }, 1948 { "disable", "Disable encryption. ('encrypt enable ?' for more)", 1949 EncryptDisable, 0, 1, 2 }, 1950 { "type", "Set encryption type. ('encrypt type ?' for more)", 1951 EncryptType, 0, 1, 1 }, 1952 { "start", "Start encryption. ('encrypt start ?' for more)", 1953 (encrypthandler) EncryptStart, 1, 0, 1 }, 1954 { "stop", "Stop encryption. ('encrypt stop ?' for more)", 1955 (encrypthandler) EncryptStop, 1, 0, 1 }, 1956 { "input", "Start encrypting the input stream", 1957 (encrypthandler) EncryptStartInput, 1, 0, 0 }, 1958 { "-input", "Stop encrypting the input stream", 1959 (encrypthandler) EncryptStopInput, 1, 0, 0 }, 1960 { "output", "Start encrypting the output stream", 1961 (encrypthandler) EncryptStartOutput, 1, 0, 0 }, 1962 { "-output", "Stop encrypting the output stream", 1963 (encrypthandler) EncryptStopOutput, 1, 0, 0 }, 1964 1965 { "status", "Display current status of authentication information", 1966 (encrypthandler) EncryptStatus, 0, 0, 0 }, 1967 { "help", 0, EncryptHelp, 0, 0, 0 }, 1968 { "?", "Print help information", EncryptHelp, 0, 0, 0 }, 1969 { 0 }, 1970 }; 1971 1972 static int 1973 EncryptHelp(char *s1, char *s2) 1974 { 1975 struct encryptlist *c; 1976 1977 for (c = EncryptList; c->name; c++) { 1978 if (c->help) { 1979 if (*c->help) 1980 printf("%-15s %s\n", c->name, c->help); 1981 else 1982 printf("\n"); 1983 } 1984 } 1985 return (0); 1986 } 1987 1988 int 1989 encrypt_cmd(int argc, char *argv[]) 1990 { 1991 struct encryptlist *c; 1992 1993 if (argc < 2) { 1994 fprintf(stderr, 1995 "Need an argument to 'encrypt' command. " 1996 "'encrypt ?' for help.\n"); 1997 return (0); 1998 } 1999 2000 c = (struct encryptlist *) 2001 genget(argv[1], (char **) EncryptList, sizeof(struct encryptlist)); 2002 if (c == NULL) { 2003 fprintf(stderr, 2004 "'%s': unknown argument ('encrypt ?' for help).\n", 2005 argv[1]); 2006 return (0); 2007 } 2008 if (Ambiguous(c)) { 2009 fprintf(stderr, 2010 "'%s': ambiguous argument ('encrypt ?' for help).\n", 2011 argv[1]); 2012 return (0); 2013 } 2014 argc -= 2; 2015 if (argc < c->minarg || argc > c->maxarg) { 2016 if (c->minarg == c->maxarg) { 2017 fprintf(stderr, "Need %s%d argument%s ", 2018 c->minarg < argc ? "only " : "", c->minarg, 2019 c->minarg == 1 ? "" : "s"); 2020 } else { 2021 fprintf(stderr, "Need %s%d-%d arguments ", 2022 c->maxarg < argc ? "only " : "", c->minarg, 2023 c->maxarg); 2024 } 2025 fprintf(stderr, 2026 "to 'encrypt %s' command. 'encrypt ?' for help.\n", 2027 c->name); 2028 return (0); 2029 } 2030 if (c->needconnect && !connected) { 2031 if (!(argc && (isprefix(argv[2], "help") || 2032 isprefix(argv[2], "?")))) { 2033 printf("?Need to be connected first.\n"); 2034 return (0); 2035 } 2036 } 2037 return ((*c->handler)(argv[2], argv[3])); 2038 } 2039 #endif /* ENCRYPTION */ 2040 2041 #ifdef TN3270 2042 static void 2043 filestuff(int fd) 2044 { 2045 int res; 2046 2047 setconnmode(0); 2048 res = fcntl(fd, F_GETOWN, 0); 2049 setcommandmode(); 2050 2051 if (res == -1) { 2052 perror("fcntl"); 2053 return; 2054 } 2055 printf("\tOwner is %d.\n", res); 2056 2057 setconnmode(0); 2058 res = fcntl(fd, F_GETFL, 0); 2059 setcommandmode(); 2060 2061 if (res == -1) { 2062 perror("fcntl"); 2063 return; 2064 } 2065 #ifdef notdef 2066 printf("\tFlags are 0x%x: %s\n", res, decodeflags(res)); 2067 #endif 2068 } 2069 #endif /* defined(TN3270) */ 2070 2071 /* 2072 * Print status about the connection. 2073 */ 2074 /*ARGSUSED*/ 2075 static int 2076 status(int argc, char *argv[]) 2077 { 2078 if (connected) { 2079 printf("Connected to %s.\n", hostname); 2080 if ((argc < 2) || strcmp(argv[1], "notmuch")) { 2081 int mode = getconnmode(); 2082 2083 if (my_want_state_is_will(TELOPT_LINEMODE)) { 2084 printf("Operating with LINEMODE option\n"); 2085 printf("%s line editing\n", (mode&MODE_EDIT) ? "Local" : "No"); 2086 printf("%s catching of signals\n", 2087 (mode&MODE_TRAPSIG) ? "Local" : "No"); 2088 slcstate(); 2089 #ifdef KLUDGELINEMODE 2090 } else if (kludgelinemode && my_want_state_is_dont(TELOPT_SGA)) { 2091 printf("Operating in obsolete linemode\n"); 2092 #endif 2093 } else { 2094 printf("Operating in single character mode\n"); 2095 if (localchars) 2096 printf("Catching signals locally\n"); 2097 } 2098 printf("%s character echo\n", (mode&MODE_ECHO) ? "Local" : "Remote"); 2099 if (my_want_state_is_will(TELOPT_LFLOW)) 2100 printf("%s flow control\n", (mode&MODE_FLOW) ? "Local" : "No"); 2101 #ifdef ENCRYPTION 2102 encrypt_display(); 2103 #endif /* ENCRYPTION */ 2104 } 2105 } else { 2106 printf("No connection.\n"); 2107 } 2108 # ifndef TN3270 2109 printf("Escape character is '%s'.\n", control(escape)); 2110 (void) fflush(stdout); 2111 # else /* !defined(TN3270) */ 2112 if ((!In3270) && ((argc < 2) || strcmp(argv[1], "notmuch"))) { 2113 printf("Escape character is '%s'.\n", control(escape)); 2114 } 2115 if ((argc >= 2) && !strcmp(argv[1], "everything")) { 2116 printf("SIGIO received %d time%s.\n", 2117 sigiocount, (sigiocount == 1)? "":"s"); 2118 if (In3270) { 2119 printf("Process ID %d, process group %d.\n", 2120 getpid(), getpgrp()); 2121 printf("Terminal input:\n"); 2122 filestuff(tin); 2123 printf("Terminal output:\n"); 2124 filestuff(tout); 2125 printf("Network socket:\n"); 2126 filestuff(net); 2127 } 2128 } 2129 if (In3270 && transcom) { 2130 printf("Transparent mode command is '%s'.\n", transcom); 2131 } 2132 (void) fflush(stdout); 2133 if (In3270) { 2134 return 0; 2135 } 2136 # endif /* defined(TN3270) */ 2137 return 1; 2138 } 2139 2140 /* 2141 * Function that gets called when SIGINFO is received. 2142 */ 2143 int 2144 ayt_status(void) 2145 { 2146 return call(status, "status", "notmuch", 0); 2147 } 2148 2149 static const char * 2150 sockaddr_ntop(struct sockaddr *sa) 2151 { 2152 static char addrbuf[NI_MAXHOST]; 2153 #ifdef NI_WITHSCOPEID 2154 const int niflags = NI_NUMERICHOST | NI_WITHSCOPEID; 2155 #else 2156 const int niflags = NI_NUMERICHOST; 2157 #endif 2158 2159 if (getnameinfo(sa, sa->sa_len, addrbuf, sizeof(addrbuf), 2160 NULL, 0, niflags) == 0) 2161 return addrbuf; 2162 else 2163 return NULL; 2164 } 2165 2166 #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC) 2167 static int setpolicy (int, struct addrinfo *, char *); 2168 2169 static int 2170 setpolicy(int net, struct addrinfo *res, char *policy) 2171 { 2172 char *buf; 2173 int level; 2174 int optname; 2175 2176 if (policy == NULL) 2177 return 0; 2178 2179 buf = ipsec_set_policy(policy, strlen(policy)); 2180 if (buf == NULL) { 2181 printf("%s\n", ipsec_strerror()); 2182 return -1; 2183 } 2184 level = res->ai_family == AF_INET ? IPPROTO_IP : IPPROTO_IPV6; 2185 optname = res->ai_family == AF_INET ? IP_IPSEC_POLICY : IPV6_IPSEC_POLICY; 2186 if (setsockopt(net, level, optname, buf, ipsec_get_policylen(buf)) < 0){ 2187 perror("setsockopt"); 2188 return -1; 2189 } 2190 2191 free(buf); 2192 return 0; 2193 } 2194 #endif 2195 2196 int 2197 tn(int argc, char *argv[]) 2198 { 2199 struct addrinfo hints, *res, *res0; 2200 char *cause = "telnet: unknown"; 2201 int error; 2202 #if defined(IP_OPTIONS) && defined(IPPROTO_IP) 2203 char *srp = 0; 2204 unsigned long srlen; 2205 int proto, opt; 2206 #endif 2207 char *cmd, *hostp = 0, *portp = 0; 2208 const char *user = 0; 2209 #ifdef __GNUC__ /* Avoid vfork clobbering */ 2210 (void) &user; 2211 #endif 2212 2213 if (connected) { 2214 printf("?Already connected to %s\n", hostname); 2215 return 0; 2216 } 2217 if (argc < 2) { 2218 (void) strlcpy(line, "open ", sizeof(line)); 2219 printf("(to) "); 2220 (void) fgets(&line[strlen(line)], sizeof(line) - strlen(line), stdin); 2221 makeargv(); 2222 argc = margc; 2223 argv = margv; 2224 } 2225 cmd = *argv; 2226 --argc; ++argv; 2227 while (argc) { 2228 if (strcmp(*argv, "help") == 0 || isprefix(*argv, "?")) 2229 goto usage; 2230 if (strcmp(*argv, "-l") == 0) { 2231 --argc; ++argv; 2232 if (argc == 0) 2233 goto usage; 2234 user = *argv++; 2235 --argc; 2236 continue; 2237 } 2238 if (strcmp(*argv, "-a") == 0) { 2239 --argc; ++argv; 2240 autologin = 1; 2241 continue; 2242 } 2243 if (hostp == 0) { 2244 hostp = *argv++; 2245 --argc; 2246 continue; 2247 } 2248 if (portp == 0) { 2249 portp = *argv++; 2250 --argc; 2251 continue; 2252 } 2253 usage: 2254 printf("usage: %s [-l user] [-a] host-name [port]\n", cmd); 2255 return 0; 2256 } 2257 if (hostp == 0) 2258 goto usage; 2259 2260 (void) strlcpy(_hostname, hostp, sizeof(_hostname)); 2261 if (hostp[0] == '@' || hostp[0] == '!') { 2262 char *p; 2263 hostname = NULL; 2264 for (p = hostp + 1; *p; p++) { 2265 if (*p == ',' || *p == '@') 2266 hostname = p; 2267 } 2268 if (hostname == NULL) { 2269 fprintf(stderr, "%s: bad source route specification\n", hostp); 2270 return 0; 2271 } 2272 *hostname++ = '\0'; 2273 } else 2274 hostname = hostp; 2275 2276 if (!portp) { 2277 telnetport = 1; 2278 portp = "telnet"; 2279 } else if (portp[0] == '-') { 2280 /* use telnet negotiation if port number/name preceded by minus sign */ 2281 telnetport = 1; 2282 portp++; 2283 } else 2284 telnetport = 0; 2285 2286 memset(&hints, 0, sizeof(hints)); 2287 hints.ai_family = family; 2288 hints.ai_socktype = SOCK_STREAM; 2289 hints.ai_protocol = 0; 2290 hints.ai_flags = AI_NUMERICHOST; /* avoid forward lookup */ 2291 error = getaddrinfo(hostname, portp, &hints, &res0); 2292 if (!error) { 2293 /* numeric */ 2294 if (doaddrlookup && 2295 getnameinfo(res0->ai_addr, res0->ai_addrlen, 2296 _hostname, sizeof(_hostname), NULL, 0, NI_NAMEREQD) == 0) 2297 ; /* okay */ 2298 else 2299 strlcpy(_hostname, hostname, sizeof(_hostname)); 2300 } else { 2301 /* FQDN - try again with forward DNS lookup */ 2302 memset(&hints, 0, sizeof(hints)); 2303 hints.ai_family = family; 2304 hints.ai_socktype = SOCK_STREAM; 2305 hints.ai_protocol = 0; 2306 hints.ai_flags = AI_CANONNAME; 2307 error = getaddrinfo(hostname, portp, &hints, &res0); 2308 if (error == EAI_SERVICE) { 2309 fprintf(stderr, "tcp/%s: unknown service\n", portp); 2310 return 0; 2311 } else if (error) { 2312 fprintf(stderr, "%s: %s\n", hostname, gai_strerror(error)); 2313 return 0; 2314 } 2315 if (res0->ai_canonname) 2316 (void)strlcpy(_hostname, res0->ai_canonname, sizeof(_hostname)); 2317 else 2318 (void)strlcpy(_hostname, hostname, sizeof(_hostname)); 2319 } 2320 hostname = _hostname; 2321 2322 net = -1; 2323 for (res = res0; res; res = res->ai_next) { 2324 printf("Trying %s...\n", sockaddr_ntop(res->ai_addr)); 2325 net = socket(res->ai_family, res->ai_socktype, res->ai_protocol); 2326 if (net < 0) { 2327 cause = "telnet: socket"; 2328 continue; 2329 } 2330 2331 if (debug && SetSockOpt(net, SOL_SOCKET, SO_DEBUG, 1) < 0) { 2332 perror("setsockopt (SO_DEBUG)"); 2333 } 2334 if (hostp[0] == '@' || hostp[0] == '!') { 2335 if ((srlen = sourceroute(res, hostp, &srp, &proto, &opt)) < 0) { 2336 (void) NetClose(net); 2337 net = -1; 2338 continue; 2339 } 2340 if (srp && setsockopt(net, proto, opt, srp, srlen) < 0) 2341 perror("setsockopt (source route)"); 2342 } 2343 2344 #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC) 2345 if (setpolicy(net, res, ipsec_policy_in) < 0) { 2346 (void) NetClose(net); 2347 net = -1; 2348 continue; 2349 } 2350 if (setpolicy(net, res, ipsec_policy_out) < 0) { 2351 (void) NetClose(net); 2352 net = -1; 2353 continue; 2354 } 2355 #endif 2356 2357 if (connect(net, res->ai_addr, res->ai_addrlen) < 0) { 2358 if (res->ai_next) { 2359 int oerrno = errno; 2360 2361 fprintf(stderr, "telnet: connect to address %s: ", 2362 sockaddr_ntop(res->ai_addr)); 2363 errno = oerrno; 2364 perror((char *)0); 2365 } 2366 cause = "telnet: Unable to connect to remote host"; 2367 (void) NetClose(net); 2368 net = -1; 2369 continue; 2370 } 2371 2372 connected++; 2373 #if defined(AUTHENTICATION) || defined(ENCRYPTION) 2374 auth_encrypt_connect(connected); 2375 #endif /* defined(AUTHENTICATION) || defined(ENCRYPTION) */ 2376 break; 2377 } 2378 freeaddrinfo(res0); 2379 if (net < 0 || connected == 0) { 2380 perror(cause); 2381 return 0; 2382 } 2383 2384 cmdrc(hostp, hostname); 2385 if (autologin && user == NULL) { 2386 struct passwd *pw; 2387 2388 user = getenv("USER"); 2389 if (user == NULL || 2390 ((pw = getpwnam(user)) && pw->pw_uid != getuid())) { 2391 if ((pw = getpwuid(getuid())) != NULL) 2392 user = pw->pw_name; 2393 else 2394 user = NULL; 2395 } 2396 } 2397 if (user) { 2398 env_define((unsigned char *)"USER", (unsigned char *)user); 2399 env_export((unsigned char *)"USER", NULL); 2400 } 2401 (void) call(status, "status", "notmuch", 0); 2402 telnet(user); 2403 (void) NetClose(net); 2404 ExitString("Connection closed by foreign host.\n",1); 2405 /*NOTREACHED*/ 2406 } 2407 2408 #define HELPINDENT ((int)sizeof ("connect")) 2409 2410 static char 2411 openhelp[] = "connect to a site", 2412 closehelp[] = "close current connection", 2413 logouthelp[] = "forcibly logout remote user and close the connection", 2414 quithelp[] = "exit telnet", 2415 statushelp[] = "print status information", 2416 helphelp[] = "print help information", 2417 sendhelp[] = "transmit special characters ('send ?' for more)", 2418 sethelp[] = "set operating parameters ('set ?' for more)", 2419 unsethelp[] = "unset operating parameters ('unset ?' for more)", 2420 togglestring[] ="toggle operating parameters ('toggle ?' for more)", 2421 slchelp[] = "change state of special charaters ('slc ?' for more)", 2422 displayhelp[] = "display operating parameters", 2423 #ifdef TN3270 2424 transcomhelp[] = "specify Unix command for transparent mode pipe", 2425 #endif /* defined(TN3270) */ 2426 #ifdef AUTHENTICATION 2427 authhelp[] = "turn on (off) authentication ('auth ?' for more)", 2428 #endif 2429 #ifdef ENCRYPTION 2430 encrypthelp[] = "turn on (off) encryption ('encrypt ?' for more)", 2431 #endif /* ENCRYPTION */ 2432 zhelp[] = "suspend telnet", 2433 shellhelp[] = "invoke a subshell", 2434 envhelp[] = "change environment variables ('environ ?' for more)", 2435 modestring[] = "try to enter line or character mode ('mode ?' for more)"; 2436 2437 static Command cmdtab[] = { 2438 { "close", closehelp, bye, 1 }, 2439 { "logout", logouthelp, logout, 1 }, 2440 { "display", displayhelp, display, 0 }, 2441 { "mode", modestring, modecmd, 0 }, 2442 { "open", openhelp, tn, 0 }, 2443 { "quit", quithelp, quit, 0 }, 2444 { "send", sendhelp, sendcmd, 0 }, 2445 { "set", sethelp, setcmd, 0 }, 2446 { "unset", unsethelp, unsetcmd, 0 }, 2447 { "status", statushelp, status, 0 }, 2448 { "toggle", togglestring, toggle, 0 }, 2449 { "slc", slchelp, slccmd, 0 }, 2450 #ifdef TN3270 2451 { "transcom", transcomhelp, settranscom, 0 }, 2452 #endif /* defined(TN3270) */ 2453 #ifdef AUTHENTICATION 2454 { "auth", authhelp, auth_cmd, 0 }, 2455 #endif 2456 #ifdef ENCRYPTION 2457 { "encrypt", encrypthelp, encrypt_cmd, 0 }, 2458 #endif 2459 { "z", zhelp, suspend, 0 }, 2460 #ifdef TN3270 2461 { "!", shellhelp, shell, 1 }, 2462 #else 2463 { "!", shellhelp, shell, 0 }, 2464 #endif 2465 { "environ", envhelp, env_cmd, 0 }, 2466 { "?", helphelp, help, 0 }, 2467 { NULL, NULL, NULL, 0 } 2468 }; 2469 2470 static char crmodhelp[] = "deprecated command -- use 'toggle crmod' instead"; 2471 static char escapehelp[] = "deprecated command -- use 'set escape' instead"; 2472 2473 static Command cmdtab2[] = { 2474 { "help", 0, help, 0 }, 2475 { "escape", escapehelp, setescape, 0 }, 2476 { "crmod", crmodhelp, togcrmod, 0 }, 2477 { NULL, NULL, NULL, 0 } 2478 }; 2479 2480 2481 /* 2482 * Call routine with argc, argv set from args (terminated by 0). 2483 */ 2484 2485 /*VARARGS1*/ 2486 static int 2487 call(intrtn_t routine, ...) 2488 { 2489 va_list ap; 2490 char *args[100]; 2491 int argno = 0; 2492 2493 va_start(ap, routine); 2494 while ((args[argno++] = va_arg(ap, char *)) != 0) { 2495 ; 2496 } 2497 va_end(ap); 2498 return (*routine)(argno-1, args); 2499 } 2500 2501 2502 static Command * 2503 getcmd(char *name) 2504 { 2505 Command *cm; 2506 2507 if ((cm = (Command *) genget(name, (char **) cmdtab, sizeof(Command))) != NULL) 2508 return cm; 2509 return (Command *) genget(name, (char **) cmdtab2, sizeof(Command)); 2510 } 2511 2512 void 2513 command(int top, char *tbuf, int cnt) 2514 { 2515 Command *c; 2516 2517 setcommandmode(); 2518 if (!top) { 2519 putchar('\n'); 2520 } else { 2521 (void) signal(SIGINT, SIG_DFL); 2522 (void) signal(SIGQUIT, SIG_DFL); 2523 } 2524 for (;;) { 2525 if (rlogin == _POSIX_VDISABLE) 2526 printf("%s> ", prompt); 2527 if (tbuf) { 2528 char *cp; 2529 cp = line; 2530 while (cnt > 0 && (*cp++ = *tbuf++) != '\n') 2531 cnt--; 2532 tbuf = 0; 2533 if (cp == line || *--cp != '\n' || cp == line) 2534 goto getline; 2535 *cp = '\0'; 2536 if (rlogin == _POSIX_VDISABLE) 2537 printf("%s\n", line); 2538 } else { 2539 getline: 2540 if (rlogin != _POSIX_VDISABLE) 2541 printf("%s> ", prompt); 2542 #ifdef TN3270 2543 fflush(stdout); 2544 #endif 2545 if (fgets(line, sizeof(line), stdin) == NULL) { 2546 if (feof(stdin) || ferror(stdin)) { 2547 (void) quit(0, NULL); 2548 /*NOTREACHED*/ 2549 } 2550 break; 2551 } 2552 } 2553 if (line[0] == 0) 2554 break; 2555 makeargv(); 2556 if (margv[0] == 0) { 2557 break; 2558 } 2559 c = getcmd(margv[0]); 2560 if (Ambiguous(c)) { 2561 printf("?Ambiguous command\n"); 2562 continue; 2563 } 2564 if (c == 0) { 2565 printf("?Invalid command\n"); 2566 continue; 2567 } 2568 if (c->needconnect && !connected) { 2569 printf("?Need to be connected first.\n"); 2570 continue; 2571 } 2572 if ((*c->handler)(margc, margv)) { 2573 break; 2574 } 2575 } 2576 if (!top) { 2577 if (!connected) { 2578 longjmp(toplevel, 1); 2579 /*NOTREACHED*/ 2580 } 2581 #ifdef TN3270 2582 if (shell_active == 0) { 2583 setconnmode(0); 2584 } 2585 #else /* defined(TN3270) */ 2586 setconnmode(0); 2587 #endif /* defined(TN3270) */ 2588 } 2589 } 2590 2591 /* 2592 * Help command. 2593 */ 2594 static int 2595 help(int argc, char *argv[]) 2596 { 2597 Command *c; 2598 2599 if (argc == 1) { 2600 printf("Commands may be abbreviated. Commands are:\n\n"); 2601 for (c = cmdtab; c->name; c++) 2602 if (c->help) { 2603 printf("%-*s\t%s\n", HELPINDENT, c->name, 2604 c->help); 2605 } 2606 return 0; 2607 } 2608 while (--argc > 0) { 2609 char *arg; 2610 arg = *++argv; 2611 c = getcmd(arg); 2612 if (Ambiguous(c)) 2613 printf("?Ambiguous help command %s\n", arg); 2614 else if (c == (Command *)0) 2615 printf("?Invalid help command %s\n", arg); 2616 else 2617 printf("%s\n", c->help); 2618 } 2619 return 0; 2620 } 2621 2622 static char *rcname = 0; 2623 static char rcbuf[128]; 2624 2625 void 2626 cmdrc(const char *m1, const char *m2) 2627 { 2628 Command *c; 2629 FILE *rcfile; 2630 int gotmachine = 0; 2631 int l1 = strlen(m1); 2632 int l2 = strlen(m2); 2633 char m1save[MAXHOSTNAMELEN + 1]; 2634 2635 if (skiprc) 2636 return; 2637 2638 strlcpy(m1save, m1, sizeof(m1save)); 2639 m1 = m1save; 2640 2641 if (rcname == 0) { 2642 rcname = getenv("HOME"); 2643 if (rcname) 2644 strlcpy(rcbuf, rcname, sizeof(rcbuf)); 2645 else 2646 rcbuf[0] = '\0'; 2647 strlcat(rcbuf, "/.telnetrc", sizeof(rcbuf)); 2648 rcname = rcbuf; 2649 } 2650 2651 if ((rcfile = fopen(rcname, "r")) == 0) { 2652 return; 2653 } 2654 2655 for (;;) { 2656 if (fgets(line, sizeof(line), rcfile) == NULL) 2657 break; 2658 if (line[0] == 0) 2659 break; 2660 if (line[0] == '#') 2661 continue; 2662 if (gotmachine) { 2663 if (!isspace((unsigned char)line[0])) 2664 gotmachine = 0; 2665 } 2666 if (gotmachine == 0) { 2667 if (isspace((unsigned char)line[0])) 2668 continue; 2669 if (strncasecmp(line, m1, l1) == 0) 2670 strncpy(line, &line[l1], sizeof(line) - l1); 2671 else if (strncasecmp(line, m2, l2) == 0) 2672 strncpy(line, &line[l2], sizeof(line) - l2); 2673 else if (strncasecmp(line, "DEFAULT", 7) == 0) 2674 strncpy(line, &line[7], sizeof(line) - 7); 2675 else 2676 continue; 2677 if (line[0] != ' ' && line[0] != '\t' && line[0] != '\n') 2678 continue; 2679 gotmachine = 1; 2680 } 2681 makeargv(); 2682 if (margv[0] == 0) 2683 continue; 2684 c = getcmd(margv[0]); 2685 if (Ambiguous(c)) { 2686 printf("?Ambiguous command: %s\n", margv[0]); 2687 continue; 2688 } 2689 if (c == 0) { 2690 printf("?Invalid command: %s\n", margv[0]); 2691 continue; 2692 } 2693 /* 2694 * This should never happen... 2695 */ 2696 if (c->needconnect && !connected) { 2697 printf("?Need to be connected first for %s.\n", margv[0]); 2698 continue; 2699 } 2700 (*c->handler)(margc, margv); 2701 } 2702 fclose(rcfile); 2703 } 2704 2705 /* 2706 * Source route is handed in as 2707 * [!]@hop1@hop2...@dst 2708 * 2709 * If the leading ! is present, it is a strict source route, otherwise it is 2710 * assmed to be a loose source route. Note that leading ! is effective 2711 * only for IPv4 case. 2712 * 2713 * We fill in the source route option as 2714 * hop1,hop2,hop3...dest 2715 * and return a pointer to hop1, which will 2716 * be the address to connect() to. 2717 * 2718 * Arguments: 2719 * ai: The address (by struct addrinfo) for the final destination. 2720 * 2721 * arg: Pointer to route list to decipher 2722 * 2723 * cpp: Pointer to a pointer, so that sourceroute() can return 2724 * the address of result buffer (statically alloc'ed). 2725 * 2726 * protop/optp: 2727 * Pointer to an integer. The pointed variable 2728 * lenp: pointer to an integer that contains the 2729 * length of *cpp if *cpp != NULL. 2730 * 2731 * Return values: 2732 * 2733 * Returns the length of the option pointed to by *cpp. If the 2734 * return value is -1, there was a syntax error in the 2735 * option, either arg contained unknown characters or too many hosts, 2736 * or hostname cannot be resolved. 2737 * 2738 * The caller needs to pass return value (len), *cpp, *protop and *optp 2739 * to setsockopt(2). 2740 * 2741 * *cpp: Points to the result buffer. The region is statically 2742 * allocated by the function. 2743 * 2744 * *protop: 2745 * protocol # to be passed to setsockopt(2). 2746 * 2747 * *optp: option # to be passed to setsockopt(2). 2748 * 2749 */ 2750 int 2751 sourceroute(struct addrinfo *ai, char *arg, char **cpp, int *protop, int *optp) 2752 { 2753 char *cp, *cp2, *lsrp, *lsrep; 2754 struct addrinfo hints, *res; 2755 int len, error; 2756 struct sockaddr_in *sin; 2757 char c; 2758 static char lsr[44]; 2759 #ifdef INET6 2760 struct cmsghdr *cmsg; 2761 struct sockaddr_in6 *sin6; 2762 static char rhbuf[1024]; 2763 #endif 2764 2765 /* 2766 * Verify the arguments. 2767 */ 2768 if (cpp == NULL) 2769 return -1; 2770 2771 cp = arg; 2772 2773 *cpp = NULL; 2774 2775 /* init these just in case.... */ 2776 lsrp = NULL; 2777 lsrep = NULL; 2778 #ifdef INET6 2779 cmsg = NULL; 2780 #endif 2781 2782 switch (ai->ai_family) { 2783 case AF_INET: 2784 lsrp = lsr; 2785 lsrep = lsrp + sizeof(lsr); 2786 2787 /* 2788 * Next, decide whether we have a loose source 2789 * route or a strict source route, and fill in 2790 * the begining of the option. 2791 */ 2792 if (*cp == '!') { 2793 cp++; 2794 *lsrp++ = IPOPT_SSRR; 2795 } else 2796 *lsrp++ = IPOPT_LSRR; 2797 if (*cp != '@') 2798 return -1; 2799 lsrp++; /* skip over length, we'll fill it in later */ 2800 *lsrp++ = 4; 2801 cp++; 2802 *protop = IPPROTO_IP; 2803 *optp = IP_OPTIONS; 2804 break; 2805 #ifdef INET6 2806 case AF_INET6: 2807 cmsg = inet6_rthdr_init(rhbuf, IPV6_RTHDR_TYPE_0); 2808 if (*cp != '@') 2809 return -1; 2810 cp++; 2811 *protop = IPPROTO_IPV6; 2812 *optp = IPV6_PKTOPTIONS; 2813 break; 2814 #endif 2815 default: 2816 return -1; 2817 } 2818 2819 memset(&hints, 0, sizeof(hints)); 2820 hints.ai_family = ai->ai_family; 2821 hints.ai_socktype = SOCK_STREAM; 2822 2823 for (c = 0;;) { 2824 if (c == ':') 2825 cp2 = 0; 2826 else for (cp2 = cp; (c = *cp2) != '\0'; cp2++) { 2827 if (c == ',') { 2828 *cp2++ = '\0'; 2829 if (*cp2 == '@') 2830 cp2++; 2831 } else if (c == '@') { 2832 *cp2++ = '\0'; 2833 } 2834 #if 0 /*colon conflicts with IPv6 address*/ 2835 else if (c == ':') { 2836 *cp2++ = '\0'; 2837 } 2838 #endif 2839 else 2840 continue; 2841 break; 2842 } 2843 if (!c) 2844 cp2 = 0; 2845 2846 error = getaddrinfo(cp, NULL, &hints, &res); 2847 if (error) { 2848 fprintf(stderr, "%s: %s\n", cp, gai_strerror(error)); 2849 return -1; 2850 } 2851 if (ai->ai_family != res->ai_family) { 2852 freeaddrinfo(res); 2853 return -1; 2854 } 2855 if (ai->ai_family == AF_INET) { 2856 /* 2857 * Check to make sure there is space for address 2858 */ 2859 if (lsrp + 4 > lsrep) { 2860 freeaddrinfo(res); 2861 return -1; 2862 } 2863 sin = (struct sockaddr_in *)res->ai_addr; 2864 memcpy(lsrp, &sin->sin_addr, sizeof(struct in_addr)); 2865 lsrp += sizeof(struct in_addr); 2866 } 2867 #ifdef INET6 2868 else if (ai->ai_family == AF_INET6) { 2869 sin6 = (struct sockaddr_in6 *)res->ai_addr; 2870 inet6_rthdr_add(cmsg, &sin6->sin6_addr, 2871 IPV6_RTHDR_LOOSE); 2872 } 2873 #endif 2874 else { 2875 freeaddrinfo(res); 2876 return -1; 2877 } 2878 freeaddrinfo(res); 2879 if (cp2) 2880 cp = cp2; 2881 else 2882 break; 2883 } 2884 if (ai->ai_family == AF_INET) { 2885 /* record the last hop */ 2886 if (lsrp + 4 > lsrep) 2887 return -1; 2888 sin = (struct sockaddr_in *)ai->ai_addr; 2889 memcpy(lsrp, &sin->sin_addr, sizeof(struct in_addr)); 2890 lsrp += sizeof(struct in_addr); 2891 lsr[IPOPT_OLEN] = lsrp - lsr; 2892 if (lsr[IPOPT_OLEN] <= 7 || lsr[IPOPT_OLEN] > 40) 2893 return -1; 2894 *lsrp++ = IPOPT_NOP; /*32bit word align*/ 2895 len = lsrp - lsr; 2896 *cpp = lsr; 2897 } 2898 #ifdef INET6 2899 else if (ai->ai_family == AF_INET6) { 2900 inet6_rthdr_lasthop(cmsg, IPV6_RTHDR_LOOSE); 2901 len = cmsg->cmsg_len; 2902 *cpp = rhbuf; 2903 } 2904 #endif 2905 else 2906 return -1; 2907 return len; 2908 } 2909