1 /* 2 * Copyright (c) 1988 Regents of the University of California. 3 * All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 */ 7 8 #ifndef lint 9 static char sccsid[] = "@(#)commands.c 1.30 (Berkeley) 06/28/90"; 10 #endif /* not lint */ 11 12 #include <sys/types.h> 13 #if defined(unix) 14 #include <sys/file.h> 15 #endif /* defined(unix) */ 16 #include <sys/socket.h> 17 #include <netinet/in.h> 18 #ifdef CRAY 19 #include <sys/fcntl.h> 20 #endif /* CRAY */ 21 22 #include <signal.h> 23 #include <netdb.h> 24 #include <ctype.h> 25 #include <varargs.h> 26 27 #include <arpa/telnet.h> 28 29 #include "general.h" 30 31 #include "ring.h" 32 33 #include "externs.h" 34 #include "defines.h" 35 #include "types.h" 36 37 #ifdef SRCRT 38 # ifndef CRAY 39 # include <netinet/in_systm.h> 40 # if (defined(vax) || defined(tahoe) || defined(hp300)) && !defined(ultrix) 41 # include <machine/endian.h> 42 # endif /* vax */ 43 # endif /* CRAY */ 44 #include <netinet/ip.h> 45 #endif /* SRCRT */ 46 47 #if defined(CRAY) && defined(IP_TOS) && !defined(HAS_IP_TOS) 48 # define HAS_IP_TOS 49 #endif 50 51 52 char *hostname; 53 extern char *getenv(); 54 55 #define Ambiguous(s) ((char **)s == &ambiguous) 56 static char *ambiguous; /* special return value for command routines */ 57 static call(); 58 59 typedef struct { 60 char *name; /* command name */ 61 char *help; /* help string (NULL for no help) */ 62 int (*handler)(); /* routine which executes command */ 63 int needconnect; /* Do we need to be connected to execute? */ 64 } Command; 65 66 static char line[256]; 67 static char saveline[256]; 68 static int margc; 69 static char *margv[20]; 70 71 /* 72 * Various utility routines. 73 */ 74 75 #if !defined(BSD) || (BSD <= 43) 76 77 char *h_errlist[] = { 78 "Error 0", 79 "Unknown host", /* 1 HOST_NOT_FOUND */ 80 "Host name lookup failure", /* 2 TRY_AGAIN */ 81 "Unknown server error", /* 3 NO_RECOVERY */ 82 "No address associated with name", /* 4 NO_ADDRESS */ 83 }; 84 int h_nerr = { sizeof(h_errlist)/sizeof(h_errlist[0]) }; 85 86 int h_errno; /* In some version of SunOS this is necessary */ 87 88 /* 89 * herror -- 90 * print the error indicated by the h_errno value. 91 */ 92 herror(s) 93 char *s; 94 { 95 if (s && *s) { 96 fprintf(stderr, "%s: ", s); 97 } 98 if ((h_errno < 0) || (h_errno >= h_nerr)) { 99 fprintf(stderr, "Unknown error\n"); 100 } else if (h_errno == 0) { 101 #if defined(sun) 102 fprintf(stderr, "Host unknown\n"); 103 #endif /* defined(sun) */ 104 } else { 105 fprintf(stderr, "%s\n", h_errlist[h_errno]); 106 } 107 } 108 #endif /* !define(BSD) || (BSD <= 43) */ 109 110 static void 111 makeargv() 112 { 113 register char *cp, *cp2, c; 114 register char **argp = margv; 115 116 margc = 0; 117 cp = line; 118 if (*cp == '!') { /* Special case shell escape */ 119 strcpy(saveline, line); /* save for shell command */ 120 *argp++ = "!"; /* No room in string to get this */ 121 margc++; 122 cp++; 123 } 124 while (c = *cp) { 125 register int inquote = 0; 126 while (isspace(c)) 127 c = *++cp; 128 if (c == '\0') 129 break; 130 *argp++ = cp; 131 margc += 1; 132 for (cp2 = cp; c != '\0'; c = *++cp) { 133 if (inquote) { 134 if (c == inquote) { 135 inquote = 0; 136 continue; 137 } 138 } else { 139 if (c == '\\') { 140 if ((c = *++cp) == '\0') 141 break; 142 } else if (c == '"') { 143 inquote = '"'; 144 continue; 145 } else if (c == '\'') { 146 inquote = '\''; 147 continue; 148 } else if (isspace(c)) 149 break; 150 } 151 *cp2++ = c; 152 } 153 *cp2 = '\0'; 154 if (c == '\0') 155 break; 156 cp++; 157 } 158 *argp++ = 0; 159 } 160 161 162 static char ** 163 genget(name, table, next) 164 char *name; /* name to match */ 165 char **table; /* name entry in table */ 166 char **(*next)(); /* routine to return next entry in table */ 167 { 168 register char *p, *q; 169 register char **c, **found; 170 register int nmatches, longest; 171 172 if (name == 0) { 173 return 0; 174 } 175 longest = 0; 176 nmatches = 0; 177 found = 0; 178 for (c = table; (p = *c) != 0; c = (*next)(c)) { 179 for (q = name; 180 (*q == *p) || (isupper(*q) && tolower(*q) == *p); p++, q++) 181 if (*q == 0) /* exact match? */ 182 return (c); 183 if (!*q) { /* the name was a prefix */ 184 if (q - name > longest) { 185 longest = q - name; 186 nmatches = 1; 187 found = c; 188 } else if (q - name == longest) 189 nmatches++; 190 } 191 } 192 if (nmatches > 1) 193 return &ambiguous; 194 return (found); 195 } 196 197 /* 198 * Make a character string into a number. 199 * 200 * Todo: 1. Could take random integers (12, 0x12, 012, 0b1). 201 */ 202 203 static 204 special(s) 205 register char *s; 206 { 207 register char c; 208 char b; 209 210 switch (*s) { 211 case '^': 212 b = *++s; 213 if (b == '?') { 214 c = b | 0x40; /* DEL */ 215 } else { 216 c = b & 0x1f; 217 } 218 break; 219 default: 220 c = *s; 221 break; 222 } 223 return c; 224 } 225 226 /* 227 * Construct a control character sequence 228 * for a special character. 229 */ 230 static char * 231 control(c) 232 register cc_t c; 233 { 234 static char buf[5]; 235 236 if (c == 0x7f) 237 return ("^?"); 238 if (c == (cc_t)-1) { 239 return "off"; 240 } 241 if (c >= 0x80) { 242 buf[0] = '\\'; 243 buf[1] = ((c>>6)&07) + '0'; 244 buf[2] = ((c>>3)&07) + '0'; 245 buf[3] = (c&07) + '0'; 246 buf[4] = 0; 247 } else if (c >= 0x20) { 248 buf[0] = c; 249 buf[1] = 0; 250 } else { 251 buf[0] = '^'; 252 buf[1] = '@'+c; 253 buf[2] = 0; 254 } 255 return (buf); 256 } 257 258 259 260 /* 261 * The following are data structures and routines for 262 * the "send" command. 263 * 264 */ 265 266 struct sendlist { 267 char *name; /* How user refers to it (case independent) */ 268 char *help; /* Help information (0 ==> no help) */ 269 #if defined(NOT43) 270 int (*handler)(); /* Routine to perform (for special ops) */ 271 #else /* defined(NOT43) */ 272 void (*handler)(); /* Routine to perform (for special ops) */ 273 #endif /* defined(NOT43) */ 274 int what; /* Character to be sent (<0 ==> special) */ 275 }; 276 277 #define SENDQUESTION -1 278 #define SENDESCAPE -3 279 280 static struct sendlist Sendlist[] = { 281 { "ao", "Send Telnet Abort output", 0, AO }, 282 { "ayt", "Send Telnet 'Are You There'", 0, AYT }, 283 { "brk", "Send Telnet Break", 0, BREAK }, 284 { "ec", "Send Telnet Erase Character", 0, EC }, 285 { "el", "Send Telnet Erase Line", 0, EL }, 286 { "escape", "Send current escape character", 0, SENDESCAPE }, 287 { "ga", "Send Telnet 'Go Ahead' sequence", 0, GA }, 288 { "ip", "Send Telnet Interrupt Process", 0, IP }, 289 { "nop", "Send Telnet 'No operation'", 0, NOP }, 290 { "eor", "Send Telnet 'End of Record'", 0, EOR }, 291 { "abort", "Send Telnet 'Abort Process'", 0, ABORT }, 292 { "susp", "Send Telnet 'Suspend Process'", 0, SUSP }, 293 { "eof", "Send Telnet End of File Character", 0, xEOF }, 294 { "synch", "Perform Telnet 'Synch operation'", dosynch, SYNCH }, 295 { "getstatus", "Send request for STATUS", get_status, 0 }, 296 { "?", "Display send options", 0, SENDQUESTION }, 297 { 0 } 298 }; 299 300 static struct sendlist Sendlist2[] = { /* some synonyms */ 301 { "break", 0, 0, BREAK }, 302 303 { "intp", 0, 0, IP }, 304 { "interrupt", 0, 0, IP }, 305 { "intr", 0, 0, IP }, 306 307 { "help", 0, 0, SENDQUESTION }, 308 309 { 0 } 310 }; 311 312 static char ** 313 getnextsend(name) 314 char *name; 315 { 316 struct sendlist *c = (struct sendlist *) name; 317 318 return (char **) (c+1); 319 } 320 321 static struct sendlist * 322 getsend(name) 323 char *name; 324 { 325 struct sendlist *sl; 326 327 if ((sl = (struct sendlist *) 328 genget(name, (char **) Sendlist, getnextsend)) != 0) { 329 return sl; 330 } else { 331 return (struct sendlist *) 332 genget(name, (char **) Sendlist2, getnextsend); 333 } 334 } 335 336 static 337 sendcmd(argc, argv) 338 int argc; 339 char **argv; 340 { 341 int what; /* what we are sending this time */ 342 int count; /* how many bytes we are going to need to send */ 343 int i; 344 int question = 0; /* was at least one argument a question */ 345 struct sendlist *s; /* pointer to current command */ 346 347 if (argc < 2) { 348 printf("need at least one argument for 'send' command\n"); 349 printf("'send ?' for help\n"); 350 return 0; 351 } 352 /* 353 * First, validate all the send arguments. 354 * In addition, we see how much space we are going to need, and 355 * whether or not we will be doing a "SYNCH" operation (which 356 * flushes the network queue). 357 */ 358 count = 0; 359 for (i = 1; i < argc; i++) { 360 s = getsend(argv[i]); 361 if (s == 0) { 362 printf("Unknown send argument '%s'\n'send ?' for help.\n", 363 argv[i]); 364 return 0; 365 } else if (Ambiguous(s)) { 366 printf("Ambiguous send argument '%s'\n'send ?' for help.\n", 367 argv[i]); 368 return 0; 369 } 370 switch (s->what) { 371 case SENDQUESTION: 372 question = 1; 373 break; 374 case SENDESCAPE: 375 count += 1; 376 break; 377 case SYNCH: 378 count += 2; 379 break; 380 default: 381 count += 2; 382 break; 383 } 384 } 385 if (!connected) { 386 if (count) 387 printf("?Need to be connected first.\n"); 388 if (question) { 389 for (s = Sendlist; s->name; s++) 390 if (s->help) 391 printf("%-15s %s\n", s->name, s->help); 392 } else 393 printf("'send ?' for help\n"); 394 return !question; 395 } 396 /* Now, do we have enough room? */ 397 if (NETROOM() < count) { 398 printf("There is not enough room in the buffer TO the network\n"); 399 printf("to process your request. Nothing will be done.\n"); 400 printf("('send synch' will throw away most data in the network\n"); 401 printf("buffer, if this might help.)\n"); 402 return 0; 403 } 404 /* OK, they are all OK, now go through again and actually send */ 405 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(); 409 /*NOTREACHED*/ 410 } 411 if (s->handler) { 412 (*s->handler)(s); 413 } else { 414 switch (what = s->what) { 415 case SYNCH: 416 dosynch(); 417 break; 418 case SENDQUESTION: 419 for (s = Sendlist; s->name; s++) { 420 if (s->help) 421 printf("%-15s %s\n", s->name, s->help); 422 } 423 question = 1; 424 break; 425 case SENDESCAPE: 426 NETADD(escape); 427 break; 428 default: 429 NET2ADD(IAC, what); 430 break; 431 } 432 } 433 } 434 return !question; 435 } 436 437 /* 438 * The following are the routines and data structures referred 439 * to by the arguments to the "toggle" command. 440 */ 441 442 static 443 lclchars() 444 { 445 donelclchars = 1; 446 return 1; 447 } 448 449 static 450 togdebug() 451 { 452 #ifndef NOT43 453 if (net > 0 && 454 (SetSockOpt(net, SOL_SOCKET, SO_DEBUG, debug)) < 0) { 455 perror("setsockopt (SO_DEBUG)"); 456 } 457 #else /* NOT43 */ 458 if (debug) { 459 if (net > 0 && SetSockOpt(net, SOL_SOCKET, SO_DEBUG, 0, 0) < 0) 460 perror("setsockopt (SO_DEBUG)"); 461 } else 462 printf("Cannot turn off socket debugging\n"); 463 #endif /* NOT43 */ 464 return 1; 465 } 466 467 468 static int 469 togcrlf() 470 { 471 if (crlf) { 472 printf("Will send carriage returns as telnet <CR><LF>.\n"); 473 } else { 474 printf("Will send carriage returns as telnet <CR><NUL>.\n"); 475 } 476 return 1; 477 } 478 479 int binmode; 480 481 static int 482 togbinary(val) 483 int val; 484 { 485 donebinarytoggle = 1; 486 487 if (val >= 0) { 488 binmode = val; 489 } else { 490 if (my_want_state_is_will(TELOPT_BINARY) && 491 my_want_state_is_do(TELOPT_BINARY)) { 492 binmode = 1; 493 } else if (my_want_state_is_wont(TELOPT_BINARY) && 494 my_want_state_is_dont(TELOPT_BINARY)) { 495 binmode = 0; 496 } 497 val = binmode ? 0 : 1; 498 } 499 500 if (val == 1) { 501 if (my_want_state_is_will(TELOPT_BINARY) && 502 my_want_state_is_do(TELOPT_BINARY)) { 503 printf("Already operating in binary mode with remote host.\n"); 504 } else { 505 printf("Negotiating binary mode with remote host.\n"); 506 tel_enter_binary(3); 507 } 508 } else { 509 if (my_want_state_is_wont(TELOPT_BINARY) && 510 my_want_state_is_dont(TELOPT_BINARY)) { 511 printf("Already in network ascii mode with remote host.\n"); 512 } else { 513 printf("Negotiating network ascii mode with remote host.\n"); 514 tel_leave_binary(3); 515 } 516 } 517 return 1; 518 } 519 520 static int 521 togrbinary(val) 522 int val; 523 { 524 donebinarytoggle = 1; 525 526 if (val == -1) 527 val = my_want_state_is_do(TELOPT_BINARY) ? 0 : 1; 528 529 if (val == 1) { 530 if (my_want_state_is_do(TELOPT_BINARY)) { 531 printf("Already receiving in binary mode.\n"); 532 } else { 533 printf("Negotiating binary mode on input.\n"); 534 tel_enter_binary(1); 535 } 536 } else { 537 if (my_want_state_is_dont(TELOPT_BINARY)) { 538 printf("Already receiving in network ascii mode.\n"); 539 } else { 540 printf("Negotiating network ascii mode on input.\n"); 541 tel_leave_binary(1); 542 } 543 } 544 return 1; 545 } 546 547 static int 548 togxbinary(val) 549 int val; 550 { 551 donebinarytoggle = 1; 552 553 if (val == -1) 554 val = my_want_state_is_will(TELOPT_BINARY) ? 0 : 1; 555 556 if (val == 1) { 557 if (my_want_state_is_will(TELOPT_BINARY)) { 558 printf("Already transmitting in binary mode.\n"); 559 } else { 560 printf("Negotiating binary mode on output.\n"); 561 tel_enter_binary(2); 562 } 563 } else { 564 if (my_want_state_is_wont(TELOPT_BINARY)) { 565 printf("Already transmitting in network ascii mode.\n"); 566 } else { 567 printf("Negotiating network ascii mode on output.\n"); 568 tel_leave_binary(2); 569 } 570 } 571 return 1; 572 } 573 574 575 extern int togglehelp(); 576 extern int slc_check(); 577 578 struct togglelist { 579 char *name; /* name of toggle */ 580 char *help; /* help message */ 581 int (*handler)(); /* routine to do actual setting */ 582 int *variable; 583 char *actionexplanation; 584 }; 585 586 static struct togglelist Togglelist[] = { 587 { "autoflush", 588 "flushing of output when sending interrupt characters", 589 0, 590 &autoflush, 591 "flush output when sending interrupt characters" }, 592 { "autosynch", 593 "automatic sending of interrupt characters in urgent mode", 594 0, 595 &autosynch, 596 "send interrupt characters in urgent mode" }, 597 { "binary", 598 "sending and receiving of binary data", 599 togbinary, 600 0, 601 0 }, 602 { "inbinary", 603 "receiving of binary data", 604 togrbinary, 605 0, 606 0 }, 607 { "outbinary", 608 "sending of binary data", 609 togxbinary, 610 0, 611 0 }, 612 { "crlf", 613 "sending carriage returns as telnet <CR><LF>", 614 togcrlf, 615 &crlf, 616 0 }, 617 { "crmod", 618 "mapping of received carriage returns", 619 0, 620 &crmod, 621 "map carriage return on output" }, 622 { "localchars", 623 "local recognition of certain control characters", 624 lclchars, 625 &localchars, 626 "recognize certain control characters" }, 627 #ifdef KERBEROS 628 { "kerberos", 629 "toggle use of Kerberos authentication", 630 0, 631 &kerberized, 632 "use Kerberos authentication" }, 633 #endif 634 { " ", "", 0 }, /* empty line */ 635 #if defined(unix) && defined(TN3270) 636 { "apitrace", 637 "(debugging) toggle tracing of API transactions", 638 0, 639 &apitrace, 640 "trace API transactions" }, 641 { "cursesdata", 642 "(debugging) toggle printing of hexadecimal curses data", 643 0, 644 &cursesdata, 645 "print hexadecimal representation of curses data" }, 646 #endif /* defined(unix) && defined(TN3270) */ 647 { "debug", 648 "debugging", 649 togdebug, 650 &debug, 651 "turn on socket level debugging" }, 652 { "netdata", 653 "printing of hexadecimal network data (debugging)", 654 0, 655 &netdata, 656 "print hexadecimal representation of network traffic" }, 657 { "prettydump", 658 "output of \"netdata\" to user readable format (debugging)", 659 0, 660 &prettydump, 661 "print user readable output for \"netdata\"" }, 662 { "options", 663 "viewing of options processing (debugging)", 664 0, 665 &showoptions, 666 "show option processing" }, 667 #if defined(unix) 668 { "termdata", 669 "(debugging) toggle printing of hexadecimal terminal data", 670 0, 671 &termdata, 672 "print hexadecimal representation of terminal traffic" }, 673 #endif /* defined(unix) */ 674 { "?", 675 0, 676 togglehelp }, 677 { "help", 678 0, 679 togglehelp }, 680 { 0 } 681 }; 682 683 static 684 togglehelp() 685 { 686 struct togglelist *c; 687 688 for (c = Togglelist; c->name; c++) { 689 if (c->help) { 690 if (*c->help) 691 printf("%-15s toggle %s\n", c->name, c->help); 692 else 693 printf("\n"); 694 } 695 } 696 printf("\n"); 697 printf("%-15s %s\n", "?", "display help information"); 698 return 0; 699 } 700 701 static 702 settogglehelp(set) 703 int set; 704 { 705 struct togglelist *c; 706 707 for (c = Togglelist; c->name; c++) { 708 if (c->help) { 709 if (*c->help) 710 printf("%-15s %s %s\n", c->name, set ? "enable" : "disable", 711 c->help); 712 else 713 printf("\n"); 714 } 715 } 716 } 717 718 static char ** 719 getnexttoggle(name) 720 char *name; 721 { 722 struct togglelist *c = (struct togglelist *) name; 723 724 return (char **) (c+1); 725 } 726 727 static struct togglelist * 728 gettoggle(name) 729 char *name; 730 { 731 return (struct togglelist *) 732 genget(name, (char **) Togglelist, getnexttoggle); 733 } 734 735 static 736 toggle(argc, argv) 737 int argc; 738 char *argv[]; 739 { 740 int retval = 1; 741 char *name; 742 struct togglelist *c; 743 744 if (argc < 2) { 745 fprintf(stderr, 746 "Need an argument to 'toggle' command. 'toggle ?' for help.\n"); 747 return 0; 748 } 749 argc--; 750 argv++; 751 while (argc--) { 752 name = *argv++; 753 c = gettoggle(name); 754 if (Ambiguous(c)) { 755 fprintf(stderr, "'%s': ambiguous argument ('toggle ?' for help).\n", 756 name); 757 return 0; 758 } else if (c == 0) { 759 fprintf(stderr, "'%s': unknown argument ('toggle ?' for help).\n", 760 name); 761 return 0; 762 } else { 763 if (c->variable) { 764 *c->variable = !*c->variable; /* invert it */ 765 if (c->actionexplanation) { 766 printf("%s %s.\n", *c->variable? "Will" : "Won't", 767 c->actionexplanation); 768 } 769 } 770 if (c->handler) { 771 retval &= (*c->handler)(-1); 772 } 773 } 774 } 775 return retval; 776 } 777 778 /* 779 * The following perform the "set" command. 780 */ 781 782 #ifdef USE_TERMIO 783 struct termio new_tc = { 0 }; 784 #endif 785 786 struct setlist { 787 char *name; /* name */ 788 char *help; /* help information */ 789 void (*handler)(); 790 cc_t *charp; /* where it is located at */ 791 }; 792 793 static struct setlist Setlist[] = { 794 #ifdef KLUDGELINEMODE 795 { "echo", "character to toggle local echoing on/off", 0, &echoc }, 796 #endif 797 { "escape", "character to escape back to telnet command mode", 0, &escape }, 798 { "tracefile", "file to write trace intormation to", SetNetTrace, (cc_t *)NetTraceFile}, 799 { " ", "" }, 800 { " ", "The following need 'localchars' to be toggled true", 0, 0 }, 801 { "flushoutput", "character to cause an Abort Oubput", 0, termFlushCharp }, 802 { "interrupt", "character to cause an Interrupt Process", 0, termIntCharp }, 803 { "quit", "character to cause an Abort process", 0, termQuitCharp }, 804 { "eof", "character to cause an EOF ", 0, termEofCharp }, 805 { " ", "" }, 806 { " ", "The following are for local editing in linemode", 0, 0 }, 807 { "erase", "character to use to erase a character", 0, termEraseCharp }, 808 { "kill", "character to use to erase a line", 0, termKillCharp }, 809 { "lnext", "character to use for literal next", 0, termLiteralNextCharp }, 810 { "susp", "character to cause a Suspend Process", 0, termSuspCharp }, 811 { "reprint", "character to use for line reprint", 0, termRprntCharp }, 812 { "worderase", "character to use to erase a word", 0, termWerasCharp }, 813 { "start", "character to use for XON", 0, termStartCharp }, 814 { "stop", "character to use for XOFF", 0, termStopCharp }, 815 { "forw1", "alternate end of line character", 0, termForw1Charp }, 816 { "forw2", "alternate end of line character", 0, termForw2Charp }, 817 { 0 } 818 }; 819 820 #ifdef CRAY 821 /* Work around compiler bug */ 822 _setlist_init() 823 { 824 #ifndef KLUDGELINEMODE 825 #define N 4 826 #else 827 #define N 5 828 #endif 829 Setlist[N+0].charp = &termFlushChar; 830 Setlist[N+1].charp = &termIntChar; 831 Setlist[N+2].charp = &termQuitChar; 832 Setlist[N+3].charp = &termEofChar; 833 Setlist[N+6].charp = &termEraseChar; 834 Setlist[N+7].charp = &termKillChar; 835 Setlist[N+8].charp = &termLiteralNextChar; 836 Setlist[N+9].charp = &termSuspChar; 837 Setlist[N+10].charp = &termRprntChar; 838 Setlist[N+11].charp = &termWerasChar; 839 Setlist[N+12].charp = &termStartChar; 840 Setlist[N+13].charp = &termStopChar; 841 Setlist[N+14].charp = &termForw1Char; 842 Setlist[N+15].charp = &termForw2Char; 843 #undef N 844 } 845 #endif /* CRAY */ 846 847 static char ** 848 getnextset(name) 849 char *name; 850 { 851 struct setlist *c = (struct setlist *)name; 852 853 return (char **) (c+1); 854 } 855 856 static struct setlist * 857 getset(name) 858 char *name; 859 { 860 return (struct setlist *) genget(name, (char **) Setlist, getnextset); 861 } 862 863 set_escape_char(s) 864 char *s; 865 { 866 escape = (s && *s) ? special(s) : -1; 867 printf("escape character is '%s'.\n", control(escape)); 868 } 869 870 static 871 setcmd(argc, argv) 872 int argc; 873 char *argv[]; 874 { 875 int value; 876 struct setlist *ct; 877 struct togglelist *c; 878 879 if (argc < 2 || argc > 3) { 880 printf("Format is 'set Name Value'\n'set ?' for help.\n"); 881 return 0; 882 } 883 if ((argc == 2) && 884 ((!strcmp(argv[1], "?")) || (!strcmp(argv[1], "help")))) { 885 for (ct = Setlist; ct->name; ct++) 886 printf("%-15s %s\n", ct->name, ct->help); 887 printf("\n"); 888 settogglehelp(1); 889 printf("%-15s %s\n", "?", "display help information"); 890 return 0; 891 } 892 893 ct = getset(argv[1]); 894 if (ct == 0) { 895 c = gettoggle(argv[1]); 896 if (c == 0) { 897 fprintf(stderr, "'%s': unknown argument ('set ?' for help).\n", 898 argv[1]); 899 return 0; 900 } else if (Ambiguous(c)) { 901 fprintf(stderr, "'%s': ambiguous argument ('set ?' for help).\n", 902 argv[1]); 903 return 0; 904 } 905 if (c->variable) { 906 if ((argc == 2) || (strcmp("on", argv[2]) == 0)) 907 *c->variable = 1; 908 else if (strcmp("off", argv[2]) == 0) 909 *c->variable = 0; 910 else { 911 printf("Format is 'set togglename [on|off]'\n'set ?' for help.\n"); 912 return 0; 913 } 914 if (c->actionexplanation) { 915 printf("%s %s.\n", *c->variable? "Will" : "Won't", 916 c->actionexplanation); 917 } 918 } 919 if (c->handler) 920 (*c->handler)(1); 921 } else if (argc != 3) { 922 printf("Format is 'set Name Value'\n'set ?' for help.\n"); 923 return 0; 924 } else if (Ambiguous(ct)) { 925 fprintf(stderr, "'%s': ambiguous argument ('set ?' for help).\n", 926 argv[1]); 927 return 0; 928 } else if (ct->handler) { 929 (*ct->handler)(argv[2]); 930 printf("%s set to \"%s\".\n", ct->name, (char *)ct->charp); 931 } else { 932 if (strcmp("off", argv[2])) { 933 value = special(argv[2]); 934 } else { 935 value = -1; 936 } 937 *(ct->charp) = (cc_t)value; 938 printf("%s character is '%s'.\n", ct->name, control(*(ct->charp))); 939 } 940 slc_check(); 941 return 1; 942 } 943 944 static 945 unsetcmd(argc, argv) 946 int argc; 947 char *argv[]; 948 { 949 struct setlist *ct; 950 struct togglelist *c; 951 register char *name; 952 953 if (argc < 2) { 954 fprintf(stderr, 955 "Need an argument to 'unset' command. 'unset ?' for help.\n"); 956 return 0; 957 } 958 if ((!strcmp(argv[1], "?")) || (!strcmp(argv[1], "help"))) { 959 for (ct = Setlist; ct->name; ct++) 960 printf("%-15s %s\n", ct->name, ct->help); 961 printf("\n"); 962 settogglehelp(0); 963 printf("%-15s %s\n", "?", "display help information"); 964 return 0; 965 } 966 967 argc--; 968 argv++; 969 while (argc--) { 970 name = *argv++; 971 ct = getset(name); 972 if (ct == 0) { 973 c = gettoggle(name); 974 if (c == 0) { 975 fprintf(stderr, "'%s': unknown argument ('unset ?' for help).\n", 976 name); 977 return 0; 978 } else if (Ambiguous(c)) { 979 fprintf(stderr, "'%s': ambiguous argument ('unset ?' for help).\n", 980 name); 981 return 0; 982 } 983 if (c->variable) { 984 *c->variable = 0; 985 if (c->actionexplanation) { 986 printf("%s %s.\n", *c->variable? "Will" : "Won't", 987 c->actionexplanation); 988 } 989 } 990 if (c->handler) 991 (*c->handler)(0); 992 } else if (Ambiguous(ct)) { 993 fprintf(stderr, "'%s': ambiguous argument ('unset ?' for help).\n", 994 name); 995 return 0; 996 } else if (ct->handler) { 997 (*ct->handler)(0); 998 printf("%s reset to \"%s\".\n", ct->name, (char *)ct->charp); 999 } else { 1000 *(ct->charp) = -1; 1001 printf("%s character is '%s'.\n", ct->name, control(*(ct->charp))); 1002 } 1003 } 1004 return 1; 1005 } 1006 1007 /* 1008 * The following are the data structures and routines for the 1009 * 'mode' command. 1010 */ 1011 #ifdef KLUDGELINEMODE 1012 extern int kludgelinemode; 1013 1014 dokludgemode() 1015 { 1016 kludgelinemode = 1; 1017 send_wont(TELOPT_LINEMODE, 1); 1018 send_dont(TELOPT_SGA, 1); 1019 send_dont(TELOPT_ECHO, 1); 1020 } 1021 #endif 1022 1023 static 1024 dolinemode() 1025 { 1026 #ifdef KLUDGELINEMODE 1027 if (kludgelinemode) 1028 send_dont(TELOPT_SGA, 1); 1029 #endif 1030 send_will(TELOPT_LINEMODE, 1); 1031 send_dont(TELOPT_ECHO, 1); 1032 return 1; 1033 } 1034 1035 static 1036 docharmode() 1037 { 1038 #ifdef KLUDGELINEMODE 1039 if (kludgelinemode) 1040 send_do(TELOPT_SGA, 1); 1041 else 1042 #endif 1043 send_wont(TELOPT_LINEMODE, 1); 1044 send_do(TELOPT_ECHO, 1); 1045 return 1; 1046 } 1047 1048 setmode(bit) 1049 { 1050 return dolmmode(bit, 1); 1051 } 1052 1053 clearmode(bit) 1054 { 1055 return dolmmode(bit, 0); 1056 } 1057 1058 dolmmode(bit, on) 1059 int bit, on; 1060 { 1061 char c; 1062 extern int linemode; 1063 1064 if (my_want_state_is_wont(TELOPT_LINEMODE)) { 1065 printf("?Need to have LINEMODE option enabled first.\n"); 1066 printf("'mode ?' for help.\n"); 1067 return 0; 1068 } 1069 1070 if (on) 1071 c = (linemode | bit); 1072 else 1073 c = (linemode & ~bit); 1074 lm_mode(&c, 1, 1); 1075 return 1; 1076 } 1077 1078 struct modelist { 1079 char *name; /* command name */ 1080 char *help; /* help string */ 1081 int (*handler)(); /* routine which executes command */ 1082 int needconnect; /* Do we need to be connected to execute? */ 1083 int arg1; 1084 }; 1085 1086 extern int modehelp(); 1087 1088 static struct modelist ModeList[] = { 1089 { "character", "Disable LINEMODE option", docharmode, 1 }, 1090 #ifdef KLUDGELINEMODE 1091 { "", "(or disable obsolete line-by-line mode)", 0 }, 1092 #endif 1093 { "line", "Enable LINEMODE option", dolinemode, 1 }, 1094 #ifdef KLUDGELINEMODE 1095 { "", "(or enable obsolete line-by-line mode)", 0 }, 1096 #endif 1097 { "", "", 0 }, 1098 { "", "These require the LINEMODE option to be enabled", 0 }, 1099 { "isig", "Enable signal trapping", setmode, 1, MODE_TRAPSIG }, 1100 { "+isig", 0, setmode, 1, MODE_TRAPSIG }, 1101 { "-isig", "Disable signal trapping", clearmode, 1, MODE_TRAPSIG }, 1102 { "edit", "Enable character editing", setmode, 1, MODE_EDIT }, 1103 { "+edit", 0, setmode, 1, MODE_EDIT }, 1104 { "-edit", "Disable character editing", clearmode, 1, MODE_EDIT }, 1105 { "softtabs", "Enable tab expansion", setmode, 1, MODE_SOFT_TAB }, 1106 { "+softtabs", 0, setmode, 1, MODE_SOFT_TAB }, 1107 { "-softtabs", "Disable character editing", clearmode, 1, MODE_SOFT_TAB }, 1108 { "litecho", "Enable literal character echo", setmode, 1, MODE_LIT_ECHO }, 1109 { "+litecho", 0, setmode, 1, MODE_LIT_ECHO }, 1110 { "-litecho", "Disable literal character echo", clearmode, 1, MODE_LIT_ECHO }, 1111 { "help", 0, modehelp, 0 }, 1112 #ifdef KLUDGELINEMODE 1113 { "kludgeline", 0, dokludgemode, 1 }, 1114 #endif 1115 { "", "", 0 }, 1116 { "?", "Print help information", modehelp, 0 }, 1117 { 0 }, 1118 }; 1119 1120 static char ** 1121 getnextmode(name) 1122 char *name; 1123 { 1124 return (char **) (((struct modelist *)name)+1); 1125 } 1126 1127 static struct modelist * 1128 getmodecmd(name) 1129 char *name; 1130 { 1131 return (struct modelist *) genget(name, (char **) ModeList, getnextmode); 1132 } 1133 1134 modehelp() 1135 { 1136 struct modelist *mt; 1137 1138 printf("format is: 'mode Mode', where 'Mode' is one of:\n\n"); 1139 for (mt = ModeList; mt->name; mt++) { 1140 if (mt->help) { 1141 if (*mt->help) 1142 printf("%-15s %s\n", mt->name, mt->help); 1143 else 1144 printf("\n"); 1145 } 1146 } 1147 return 0; 1148 } 1149 1150 static 1151 modecmd(argc, argv) 1152 int argc; 1153 char *argv[]; 1154 { 1155 struct modelist *mt; 1156 1157 if (argc != 2) { 1158 printf("'mode' command requires an argument\n"); 1159 printf("'mode ?' for help.\n"); 1160 } else if ((mt = getmodecmd(argv[1])) == 0) { 1161 fprintf(stderr, "Unknown mode '%s' ('mode ?' for help).\n", argv[1]); 1162 } else if (Ambiguous(mt)) { 1163 fprintf(stderr, "Ambiguous mode '%s' ('mode ?' for help).\n", argv[1]); 1164 } else if (mt->needconnect && !connected) { 1165 printf("?Need to be connected first.\n"); 1166 printf("'mode ?' for help.\n"); 1167 } else if (mt->handler) { 1168 return (*mt->handler)(mt->arg1); 1169 } 1170 return 0; 1171 } 1172 1173 /* 1174 * The following data structures and routines implement the 1175 * "display" command. 1176 */ 1177 1178 static 1179 display(argc, argv) 1180 int argc; 1181 char *argv[]; 1182 { 1183 #define dotog(tl) if (tl->variable && tl->actionexplanation) { \ 1184 if (*tl->variable) { \ 1185 printf("will"); \ 1186 } else { \ 1187 printf("won't"); \ 1188 } \ 1189 printf(" %s.\n", tl->actionexplanation); \ 1190 } 1191 1192 #define doset(sl) if (sl->name && *sl->name != ' ') { \ 1193 if (sl->handler == 0) \ 1194 printf("%-15s [%s]\n", sl->name, control(*sl->charp)); \ 1195 else \ 1196 printf("%-15s \"%s\"\n", sl->name, (char *)sl->charp); \ 1197 } 1198 1199 struct togglelist *tl; 1200 struct setlist *sl; 1201 1202 if (argc == 1) { 1203 for (tl = Togglelist; tl->name; tl++) { 1204 dotog(tl); 1205 } 1206 printf("\n"); 1207 for (sl = Setlist; sl->name; sl++) { 1208 doset(sl); 1209 } 1210 } else { 1211 int i; 1212 1213 for (i = 1; i < argc; i++) { 1214 sl = getset(argv[i]); 1215 tl = gettoggle(argv[i]); 1216 if (Ambiguous(sl) || Ambiguous(tl)) { 1217 printf("?Ambiguous argument '%s'.\n", argv[i]); 1218 return 0; 1219 } else if (!sl && !tl) { 1220 printf("?Unknown argument '%s'.\n", argv[i]); 1221 return 0; 1222 } else { 1223 if (tl) { 1224 dotog(tl); 1225 } 1226 if (sl) { 1227 doset(sl); 1228 } 1229 } 1230 } 1231 } 1232 /*@*/optionstatus(); 1233 return 1; 1234 #undef doset 1235 #undef dotog 1236 } 1237 1238 /* 1239 * The following are the data structures, and many of the routines, 1240 * relating to command processing. 1241 */ 1242 1243 /* 1244 * Set the escape character. 1245 */ 1246 static 1247 setescape(argc, argv) 1248 int argc; 1249 char *argv[]; 1250 { 1251 register char *arg; 1252 char buf[50]; 1253 1254 printf( 1255 "Deprecated usage - please use 'set escape%s%s' in the future.\n", 1256 (argc > 2)? " ":"", (argc > 2)? argv[1]: ""); 1257 if (argc > 2) 1258 arg = argv[1]; 1259 else { 1260 printf("new escape character: "); 1261 (void) gets(buf); 1262 arg = buf; 1263 } 1264 if (arg[0] != '\0') 1265 escape = arg[0]; 1266 if (!In3270) { 1267 printf("Escape character is '%s'.\n", control(escape)); 1268 } 1269 (void) fflush(stdout); 1270 return 1; 1271 } 1272 1273 /*VARARGS*/ 1274 static 1275 togcrmod() 1276 { 1277 crmod = !crmod; 1278 printf("Deprecated usage - please use 'toggle crmod' in the future.\n"); 1279 printf("%s map carriage return on output.\n", crmod ? "Will" : "Won't"); 1280 (void) fflush(stdout); 1281 return 1; 1282 } 1283 1284 /*VARARGS*/ 1285 suspend() 1286 { 1287 #ifdef SIGTSTP 1288 setcommandmode(); 1289 { 1290 long oldrows, oldcols, newrows, newcols, err; 1291 1292 err = TerminalWindowSize(&oldrows, &oldcols); 1293 (void) kill(0, SIGTSTP); 1294 err += TerminalWindowSize(&newrows, &newcols); 1295 if (connected && !err && 1296 ((oldrows != newrows) || (oldcols != newcols))) { 1297 sendnaws(); 1298 } 1299 } 1300 /* reget parameters in case they were changed */ 1301 TerminalSaveState(); 1302 setconnmode(0); 1303 #else 1304 printf("Suspend is not supported. Try the '!' command instead\n"); 1305 #endif 1306 return 1; 1307 } 1308 1309 #if !defined(TN3270) 1310 /*ARGSUSED*/ 1311 shell(argc, argv) 1312 int argc; 1313 char *argv[]; 1314 { 1315 extern char *rindex(); 1316 1317 setcommandmode(); 1318 switch(vfork()) { 1319 case -1: 1320 perror("Fork failed\n"); 1321 break; 1322 1323 case 0: 1324 { 1325 /* 1326 * Fire up the shell in the child. 1327 */ 1328 register char *shell, *shellname; 1329 1330 shell = getenv("SHELL"); 1331 if (shell == NULL) 1332 shell = "/bin/sh"; 1333 if ((shellname = rindex(shell, '/')) == 0) 1334 shellname = shell; 1335 else 1336 shellname++; 1337 if (argc > 1) 1338 execl(shell, shellname, "-c", &saveline[1], 0); 1339 else 1340 execl(shell, shellname, 0); 1341 perror("Execl"); 1342 _exit(1); 1343 } 1344 default: 1345 (void)wait((int *)0); /* Wait for the shell to complete */ 1346 } 1347 } 1348 #endif /* !defined(TN3270) */ 1349 1350 /*VARARGS*/ 1351 static 1352 bye(argc, argv) 1353 int argc; /* Number of arguments */ 1354 char *argv[]; /* arguments */ 1355 { 1356 if (connected) { 1357 (void) shutdown(net, 2); 1358 printf("Connection closed.\n"); 1359 (void) NetClose(net); 1360 connected = 0; 1361 /* reset options */ 1362 tninit(); 1363 #if defined(TN3270) 1364 SetIn3270(); /* Get out of 3270 mode */ 1365 #endif /* defined(TN3270) */ 1366 } 1367 if ((argc != 2) || (strcmp(argv[1], "fromquit") != 0)) { 1368 longjmp(toplevel, 1); 1369 /* NOTREACHED */ 1370 } 1371 return 1; /* Keep lint, etc., happy */ 1372 } 1373 1374 /*VARARGS*/ 1375 quit() 1376 { 1377 (void) call(bye, "bye", "fromquit", 0); 1378 Exit(0); 1379 /*NOTREACHED*/ 1380 } 1381 1382 /* 1383 * The SLC command. 1384 */ 1385 1386 struct slclist { 1387 char *name; 1388 char *help; 1389 int (*handler)(); 1390 int arg; 1391 }; 1392 1393 extern int slc_help(); 1394 extern int slc_mode_export(), slc_mode_import(), slcstate(); 1395 1396 struct slclist SlcList[] = { 1397 { "export", "Use local special character definitions", 1398 slc_mode_export, 0 }, 1399 { "import", "Use remote special character definitions", 1400 slc_mode_import, 1 }, 1401 { "check", "Verify remote special character definitions", 1402 slc_mode_import, 0 }, 1403 { "help", 0, slc_help, 0 }, 1404 { "?", "Print help information", slc_help, 0 }, 1405 { 0 }, 1406 }; 1407 1408 static 1409 slc_help() 1410 { 1411 struct slclist *c; 1412 1413 for (c = SlcList; c->name; c++) { 1414 if (c->help) { 1415 if (*c->help) 1416 printf("%-15s %s\n", c->name, c->help); 1417 else 1418 printf("\n"); 1419 } 1420 } 1421 } 1422 1423 static char ** 1424 getnextslc(name) 1425 char *name; 1426 { 1427 return (char **)(((struct slclist *)name)+1); 1428 } 1429 1430 static struct slclist * 1431 getslc(name) 1432 char *name; 1433 { 1434 return (struct slclist *)genget(name, (char **) SlcList, getnextslc); 1435 } 1436 1437 static 1438 slccmd(argc, argv) 1439 int argc; 1440 char *argv[]; 1441 { 1442 struct slclist *c; 1443 1444 if (argc != 2) { 1445 fprintf(stderr, 1446 "Need an argument to 'slc' command. 'slc ?' for help.\n"); 1447 return 0; 1448 } 1449 c = getslc(argv[1]); 1450 if (c == 0) { 1451 fprintf(stderr, "'%s': unknown argument ('slc ?' for help).\n", 1452 argv[1]); 1453 return 0; 1454 } 1455 if (Ambiguous(c)) { 1456 fprintf(stderr, "'%s': ambiguous argument ('slc ?' for help).\n", 1457 argv[1]); 1458 return 0; 1459 } 1460 (*c->handler)(c->arg); 1461 slcstate(); 1462 return 1; 1463 } 1464 1465 /* 1466 * The ENVIRON command. 1467 */ 1468 1469 struct envlist { 1470 char *name; 1471 char *help; 1472 int (*handler)(); 1473 int narg; 1474 }; 1475 1476 extern struct env_lst *env_define(); 1477 extern int env_undefine(); 1478 extern int env_export(), env_unexport(); 1479 extern int env_list(), env_help(); 1480 1481 struct envlist EnvList[] = { 1482 { "define", "Define an environment variable", 1483 (int (*)())env_define, 2 }, 1484 { "undefine", "Undefine an environment variable", 1485 env_undefine, 1 }, 1486 { "export", "Mark an environment variable for automatic export", 1487 env_export, 1 }, 1488 { "unexport", "Dont mark an environment variable for automatic export", 1489 env_unexport, 1 }, 1490 { "list", "List the current environment variables", 1491 env_list, 0 }, 1492 { "help", 0, env_help, 0 }, 1493 { "?", "Print help information", env_help, 0 }, 1494 { 0 }, 1495 }; 1496 1497 static 1498 env_help() 1499 { 1500 struct envlist *c; 1501 1502 for (c = EnvList; c->name; c++) { 1503 if (c->help) { 1504 if (*c->help) 1505 printf("%-15s %s\n", c->name, c->help); 1506 else 1507 printf("\n"); 1508 } 1509 } 1510 } 1511 1512 static char ** 1513 getnextenv(name) 1514 char *name; 1515 { 1516 return (char **)(((struct envlist *)name)+1); 1517 } 1518 1519 static struct envlist * 1520 getenvcmd(name) 1521 char *name; 1522 { 1523 return (struct envlist *)genget(name, (char **) EnvList, getnextenv); 1524 } 1525 1526 env_cmd(argc, argv) 1527 int argc; 1528 char *argv[]; 1529 { 1530 struct envlist *c; 1531 1532 if (argc < 2) { 1533 fprintf(stderr, 1534 "Need an argument to 'environ' command. 'environ ?' for help.\n"); 1535 return 0; 1536 } 1537 c = getenvcmd(argv[1]); 1538 if (c == 0) { 1539 fprintf(stderr, "'%s': unknown argument ('environ ?' for help).\n", 1540 argv[1]); 1541 return 0; 1542 } 1543 if (Ambiguous(c)) { 1544 fprintf(stderr, "'%s': ambiguous argument ('environ ?' for help).\n", 1545 argv[1]); 1546 return 0; 1547 } 1548 if (c->narg + 2 != argc) { 1549 fprintf(stderr, 1550 "Need %s%d argument%s to 'environ %s' command. 'environ ?' for help.\n", 1551 c->narg < argc + 2 ? "only " : "", 1552 c->narg, c->narg == 1 ? "" : "s", c->name); 1553 return 0; 1554 } 1555 (void)(*c->handler)(argv[2], argv[3]); 1556 return 1; 1557 } 1558 1559 struct env_lst { 1560 struct env_lst *next; /* pointer to next structure */ 1561 struct env_lst *prev; /* pointer to next structure */ 1562 char *var; /* pointer to variable name */ 1563 char *value; /* pointer to varialbe value */ 1564 int export; /* 1 -> export with default list of variables */ 1565 }; 1566 1567 struct env_lst envlisthead; 1568 1569 struct env_lst * 1570 env_find(var) 1571 { 1572 register struct env_lst *ep; 1573 1574 for (ep = envlisthead.next; ep; ep = ep->next) { 1575 if (strcmp(ep->var, var) == 0) 1576 return(ep); 1577 } 1578 return(NULL); 1579 } 1580 1581 env_init() 1582 { 1583 extern char **environ, *index(); 1584 register char **epp, *cp; 1585 register struct env_lst *ep; 1586 1587 for (epp = environ; *epp; epp++) { 1588 if (cp = index(*epp, '=')) { 1589 *cp = '\0'; 1590 ep = env_define(*epp, cp+1); 1591 ep->export = 0; 1592 *cp = '='; 1593 } 1594 } 1595 /* 1596 * Special case for DISPLAY variable. If it is ":0.0" or 1597 * "unix:0.0", we have to get rid of "unix" and insert our 1598 * hostname. 1599 */ 1600 if ((ep = env_find("DISPLAY")) && 1601 ((*ep->value == ':') || (strncmp(ep->value, "unix:", 5) == 0))) { 1602 char hbuf[256+1]; 1603 char *cp2 = index(ep->value, ':'); 1604 1605 gethostname(hbuf, 256); 1606 hbuf[256] = '\0'; 1607 cp = (char *)malloc(strlen(hbuf) + strlen(cp2) + 1); 1608 sprintf(cp, "%s%s", hbuf, cp2); 1609 free(ep->value); 1610 ep->value = cp; 1611 } 1612 /* 1613 * If USER is not defined, but LOGNAME is, then add 1614 * USER with the value from LOGNAME. 1615 */ 1616 if ((env_find("USER") == NULL) && (ep = env_find("LOGNAME"))) 1617 env_define("USER", ep->value); 1618 env_export("USER"); 1619 env_export("DISPLAY"); 1620 env_export("PRINTER"); 1621 } 1622 1623 struct env_lst * 1624 env_define(var, value) 1625 char *var, *value; 1626 { 1627 register struct env_lst *ep; 1628 extern char *savestr(); 1629 1630 if (ep = env_find(var)) { 1631 if (ep->var) 1632 free(ep->var); 1633 if (ep->value) 1634 free(ep->value); 1635 } else { 1636 ep = (struct env_lst *)malloc(sizeof(struct env_lst)); 1637 ep->export = 1; 1638 ep->next = envlisthead.next; 1639 envlisthead.next = ep; 1640 ep->prev = &envlisthead; 1641 if (ep->next) 1642 ep->next->prev = ep; 1643 } 1644 ep->var = savestr(var); 1645 ep->value = savestr(value); 1646 return(ep); 1647 } 1648 1649 env_undefine(var) 1650 char *var; 1651 { 1652 register struct env_lst *ep; 1653 1654 if (ep = env_find(var)) { 1655 ep->prev->next = ep->next; 1656 ep->next->prev = ep->prev; 1657 if (ep->var) 1658 free(ep->var); 1659 if (ep->value) 1660 free(ep->value); 1661 free(ep); 1662 } 1663 } 1664 1665 env_export(var) 1666 char *var; 1667 { 1668 register struct env_lst *ep; 1669 1670 if (ep = env_find(var)) 1671 ep->export = 1; 1672 } 1673 1674 env_unexport(var) 1675 char *var; 1676 { 1677 register struct env_lst *ep; 1678 1679 if (ep = env_find(var)) 1680 ep->export = 0; 1681 } 1682 1683 env_list() 1684 { 1685 register struct env_lst *ep; 1686 1687 for (ep = envlisthead.next; ep; ep = ep->next) { 1688 printf("%c %-20s %s\n", ep->export ? '*' : ' ', 1689 ep->var, ep->value); 1690 } 1691 } 1692 1693 char * 1694 env_default(init) 1695 { 1696 static struct env_lst *nep = NULL; 1697 1698 if (init) { 1699 nep = &envlisthead; 1700 return; 1701 } 1702 if (nep) { 1703 while (nep = nep->next) { 1704 if (nep->export) 1705 return(nep->var); 1706 } 1707 } 1708 return(NULL); 1709 } 1710 1711 char * 1712 env_getvalue(var) 1713 char *var; 1714 { 1715 register struct env_lst *ep; 1716 1717 if (ep = env_find(var)) 1718 return(ep->value); 1719 return(NULL); 1720 } 1721 1722 char * 1723 savestr(s) 1724 register char *s; 1725 { 1726 register char *ret; 1727 if (ret = (char *)malloc(strlen(s)+1)) 1728 strcpy(ret, s); 1729 return(ret); 1730 } 1731 1732 #if defined(unix) 1733 #ifdef notdef 1734 /* 1735 * Some information about our file descriptors. 1736 */ 1737 1738 char * 1739 decodeflags(mask) 1740 int mask; 1741 { 1742 static char buffer[100]; 1743 #define do(m,s) \ 1744 if (mask&(m)) { \ 1745 strcat(buffer, (s)); \ 1746 } 1747 1748 buffer[0] = 0; /* Terminate it */ 1749 1750 #ifdef FREAD 1751 do(FREAD, " FREAD"); 1752 #endif 1753 #ifdef FWRITE 1754 do(FWRITE, " FWRITE"); 1755 #endif 1756 #ifdef F_DUPFP 1757 do(F_DUPFD, " F_DUPFD"); 1758 #endif 1759 #ifdef FNDELAY 1760 do(FNDELAY, " FNDELAY"); 1761 #endif 1762 #ifdef FAPPEND 1763 do(FAPPEND, " FAPPEND"); 1764 #endif 1765 #ifdef FMARK 1766 do(FMARK, " FMARK"); 1767 #endif 1768 #ifdef FDEFER 1769 do(FDEFER, " FDEFER"); 1770 #endif 1771 #ifdef FASYNC 1772 do(FASYNC, " FASYNC"); 1773 #endif 1774 #ifdef FSHLOCK 1775 do(FSHLOCK, " FSHLOCK"); 1776 #endif 1777 #ifdef FEXLOCK 1778 do(FEXLOCK, " FEXLOCK"); 1779 #endif 1780 #ifdef FCREAT 1781 do(FCREAT, " FCREAT"); 1782 #endif 1783 #ifdef FTRUNC 1784 do(FTRUNC, " FTRUNC"); 1785 #endif 1786 #ifdef FEXCL 1787 do(FEXCL, " FEXCL"); 1788 #endif 1789 1790 return buffer; 1791 } 1792 #undef do 1793 #endif /* notdef */ 1794 1795 #if defined(TN3270) 1796 static void 1797 filestuff(fd) 1798 int fd; 1799 { 1800 int res; 1801 1802 #ifdef F_GETOWN 1803 setconnmode(0); 1804 res = fcntl(fd, F_GETOWN, 0); 1805 setcommandmode(); 1806 1807 if (res == -1) { 1808 perror("fcntl"); 1809 return; 1810 } 1811 printf("\tOwner is %d.\n", res); 1812 #endif 1813 1814 setconnmode(0); 1815 res = fcntl(fd, F_GETFL, 0); 1816 setcommandmode(); 1817 1818 if (res == -1) { 1819 perror("fcntl"); 1820 return; 1821 } 1822 printf("\tFlags are 0x%x: %s\n", res, decodeflags(res)); 1823 } 1824 #endif /* defined(TN3270) */ 1825 1826 1827 #endif /* defined(unix) */ 1828 1829 /* 1830 * Print status about the connection. 1831 */ 1832 /*ARGSUSED*/ 1833 static 1834 status(argc, argv) 1835 int argc; 1836 char *argv[]; 1837 { 1838 if (connected) { 1839 printf("Connected to %s.\n", hostname); 1840 if ((argc < 2) || strcmp(argv[1], "notmuch")) { 1841 int mode = getconnmode(); 1842 1843 if (my_want_state_is_will(TELOPT_LINEMODE)) { 1844 printf("Operating with LINEMODE option\n"); 1845 printf("%s line editing\n", (mode&MODE_EDIT) ? "Local" : "No"); 1846 printf("%s catching of signals\n", 1847 (mode&MODE_TRAPSIG) ? "Local" : "No"); 1848 slcstate(); 1849 #ifdef KLUDGELINEMODE 1850 } else if (kludgelinemode && my_want_state_is_dont(TELOPT_SGA)) { 1851 printf("Operating in obsolete linemode\n"); 1852 #endif 1853 } else { 1854 printf("Operating in single character mode\n"); 1855 if (localchars) 1856 printf("Catching signals locally\n"); 1857 } 1858 printf("%s character echo\n", (mode&MODE_ECHO) ? "Local" : "Remote"); 1859 if (my_want_state_is_will(TELOPT_LFLOW)) 1860 printf("%s flow control\n", (mode&MODE_FLOW) ? "Local" : "No"); 1861 } 1862 } else { 1863 printf("No connection.\n"); 1864 } 1865 # if !defined(TN3270) 1866 printf("Escape character is '%s'.\n", control(escape)); 1867 (void) fflush(stdout); 1868 # else /* !defined(TN3270) */ 1869 if ((!In3270) && ((argc < 2) || strcmp(argv[1], "notmuch"))) { 1870 printf("Escape character is '%s'.\n", control(escape)); 1871 } 1872 # if defined(unix) 1873 if ((argc >= 2) && !strcmp(argv[1], "everything")) { 1874 printf("SIGIO received %d time%s.\n", 1875 sigiocount, (sigiocount == 1)? "":"s"); 1876 if (In3270) { 1877 printf("Process ID %d, process group %d.\n", 1878 getpid(), getpgrp(getpid())); 1879 printf("Terminal input:\n"); 1880 filestuff(tin); 1881 printf("Terminal output:\n"); 1882 filestuff(tout); 1883 printf("Network socket:\n"); 1884 filestuff(net); 1885 } 1886 } 1887 if (In3270 && transcom) { 1888 printf("Transparent mode command is '%s'.\n", transcom); 1889 } 1890 # endif /* defined(unix) */ 1891 (void) fflush(stdout); 1892 if (In3270) { 1893 return 0; 1894 } 1895 # endif /* defined(TN3270) */ 1896 return 1; 1897 } 1898 1899 1900 #if defined(NEED_GETTOS) 1901 struct tosent { 1902 char *t_name; /* name */ 1903 char **t_aliases; /* alias list */ 1904 char *t_proto; /* protocol */ 1905 int t_tos; /* Type Of Service bits */ 1906 }; 1907 1908 struct tosent * 1909 gettosbyname(name, proto) 1910 char *name, *proto; 1911 { 1912 static struct tosent te; 1913 static char *aliasp = 0; 1914 1915 te.t_name = name; 1916 te.t_aliases = &aliasp; 1917 te.t_proto = proto; 1918 te.t_tos = 020; /* Low Delay bit */ 1919 return(&te); 1920 } 1921 #endif 1922 1923 int 1924 tn(argc, argv) 1925 int argc; 1926 char *argv[]; 1927 { 1928 register struct hostent *host = 0; 1929 struct sockaddr_in sin; 1930 struct servent *sp = 0; 1931 static char hnamebuf[32]; 1932 unsigned long temp, inet_addr(); 1933 extern char *inet_ntoa(); 1934 #if defined(SRCRT) && defined(IPPROTO_IP) 1935 char *srp = 0, *strrchr(); 1936 unsigned long sourceroute(), srlen; 1937 #endif 1938 #if defined(HAS_IP_TOS) || defined(NEED_GETTOS) 1939 struct tosent *tp; 1940 #endif /* defined(HAS_IP_TOS) || defined(NEED_GETTOS) */ 1941 char *cmd, *hostp = 0, *portp = 0, *user = 0; 1942 1943 1944 if (connected) { 1945 printf("?Already connected to %s\n", hostname); 1946 return 0; 1947 } 1948 if (argc < 2) { 1949 (void) strcpy(line, "Connect "); 1950 printf("(to) "); 1951 (void) gets(&line[strlen(line)]); 1952 makeargv(); 1953 argc = margc; 1954 argv = margv; 1955 } 1956 cmd = *argv; 1957 --argc; ++argv; 1958 while (argc) { 1959 if (strcmp(*argv, "-l") == 0) { 1960 --argc; ++argv; 1961 if (argc == 0) 1962 goto usage; 1963 user = *argv++; 1964 --argc; 1965 continue; 1966 } 1967 if (hostp == 0) { 1968 hostp = *argv++; 1969 --argc; 1970 continue; 1971 } 1972 if (portp == 0) { 1973 portp = *argv++; 1974 --argc; 1975 continue; 1976 } 1977 usage: 1978 printf("usage: %s [-l user] host-name [port]\n", cmd); 1979 return 0; 1980 } 1981 #if defined(SRCRT) && defined(IPPROTO_IP) 1982 if (hostp[0] == '@' || hostp[0] == '!') { 1983 if ((hostname = strrchr(hostp, ':')) == NULL) 1984 hostname = strrchr(hostp, '@'); 1985 hostname++; 1986 srp = 0; 1987 temp = sourceroute(hostp, &srp, &srlen); 1988 if (temp == 0) { 1989 herror(srp); 1990 return 0; 1991 } else if (temp == -1) { 1992 printf("Bad source route option: %s\n", hostp); 1993 return 0; 1994 } else { 1995 sin.sin_addr.s_addr = temp; 1996 sin.sin_family = AF_INET; 1997 } 1998 } else { 1999 #endif 2000 temp = inet_addr(hostp); 2001 if (temp != (unsigned long) -1) { 2002 sin.sin_addr.s_addr = temp; 2003 sin.sin_family = AF_INET; 2004 (void) strcpy(hnamebuf, hostp); 2005 hostname = hnamebuf; 2006 } else { 2007 host = gethostbyname(hostp); 2008 if (host) { 2009 sin.sin_family = host->h_addrtype; 2010 #if defined(h_addr) /* In 4.3, this is a #define */ 2011 memcpy((caddr_t)&sin.sin_addr, 2012 host->h_addr_list[0], host->h_length); 2013 #else /* defined(h_addr) */ 2014 memcpy((caddr_t)&sin.sin_addr, host->h_addr, host->h_length); 2015 #endif /* defined(h_addr) */ 2016 hostname = host->h_name; 2017 } else { 2018 herror(hostp); 2019 return 0; 2020 } 2021 } 2022 #if defined(SRCRT) && defined(IPPROTO_IP) 2023 } 2024 #endif 2025 if (portp) { 2026 if (*portp == '-') { 2027 portp++; 2028 telnetport = 1; 2029 } else 2030 telnetport = 0; 2031 sin.sin_port = atoi(portp); 2032 if (sin.sin_port == 0) { 2033 sp = getservbyname(portp, "tcp"); 2034 if (sp) 2035 sin.sin_port = sp->s_port; 2036 else { 2037 printf("%s: bad port number\n", portp); 2038 return 0; 2039 } 2040 } else { 2041 #if !defined(htons) 2042 u_short htons(); 2043 #endif /* !defined(htons) */ 2044 sin.sin_port = htons(sin.sin_port); 2045 } 2046 } else { 2047 if (sp == 0) { 2048 sp = getservbyname("telnet", "tcp"); 2049 if (sp == 0) { 2050 fprintf(stderr, "telnet: tcp/telnet: unknown service\n"); 2051 return 0; 2052 } 2053 sin.sin_port = sp->s_port; 2054 } 2055 telnetport = 1; 2056 } 2057 printf("Trying %s...\n", inet_ntoa(sin.sin_addr)); 2058 do { 2059 net = socket(AF_INET, SOCK_STREAM, 0); 2060 if (net < 0) { 2061 perror("telnet: socket"); 2062 return 0; 2063 } 2064 #if defined(SRCRT) && defined(IPPROTO_IP) 2065 if (srp && setsockopt(net, IPPROTO_IP, IP_OPTIONS, (char *)srp, srlen) < 0) 2066 perror("setsockopt (IP_OPTIONS)"); 2067 #endif 2068 #if defined(HAS_IP_TOS) || defined(NEED_GETTOS) 2069 if ((tp = gettosbyname("telnet", "tcp")) && 2070 (setsockopt(net, IPPROTO_IP, IP_TOS, &tp->t_tos, sizeof(int)) < 0)) 2071 perror("telnet: setsockopt TOS (ignored)"); 2072 #endif /* defined(HAS_IP_TOS) || defined(NEED_GETTOS) */ 2073 2074 if (debug && SetSockOpt(net, SOL_SOCKET, SO_DEBUG, 1) < 0) { 2075 perror("setsockopt (SO_DEBUG)"); 2076 } 2077 2078 if (connect(net, (struct sockaddr *)&sin, sizeof (sin)) < 0) { 2079 #if defined(h_addr) /* In 4.3, this is a #define */ 2080 if (host && host->h_addr_list[1]) { 2081 int oerrno = errno; 2082 2083 fprintf(stderr, "telnet: connect to address %s: ", 2084 inet_ntoa(sin.sin_addr)); 2085 errno = oerrno; 2086 perror((char *)0); 2087 host->h_addr_list++; 2088 memcpy((caddr_t)&sin.sin_addr, 2089 host->h_addr_list[0], host->h_length); 2090 (void) NetClose(net); 2091 continue; 2092 } 2093 #endif /* defined(h_addr) */ 2094 perror("telnet: Unable to connect to remote host"); 2095 return 0; 2096 } 2097 connected++; 2098 } while (connected == 0); 2099 cmdrc(hostp, hostname); 2100 if (user) 2101 env_define("USER", user); 2102 (void) call(status, "status", "notmuch", 0); 2103 if (setjmp(peerdied) == 0) 2104 telnet(); 2105 (void) NetClose(net); 2106 ExitString("Connection closed by foreign host.\n",1); 2107 /*NOTREACHED*/ 2108 } 2109 2110 2111 #define HELPINDENT (sizeof ("connect")) 2112 2113 static char 2114 openhelp[] = "connect to a site", 2115 closehelp[] = "close current connection", 2116 quithelp[] = "exit telnet", 2117 statushelp[] = "print status information", 2118 helphelp[] = "print help information", 2119 sendhelp[] = "transmit special characters ('send ?' for more)", 2120 sethelp[] = "set operating parameters ('set ?' for more)", 2121 unsethelp[] = "unset operating parameters ('unset ?' for more)", 2122 togglestring[] ="toggle operating parameters ('toggle ?' for more)", 2123 slchelp[] = "change state of special charaters ('slc ?' for more)", 2124 displayhelp[] = "display operating parameters", 2125 #if defined(TN3270) && defined(unix) 2126 transcomhelp[] = "specify Unix command for transparent mode pipe", 2127 #endif /* defined(TN3270) && defined(unix) */ 2128 #if defined(unix) 2129 zhelp[] = "suspend telnet", 2130 #endif /* defined(unix) */ 2131 shellhelp[] = "invoke a subshell", 2132 envhelp[] = "change environment variables ('environ ?' for more)", 2133 modestring[] = "try to enter line or character mode ('mode ?' for more)"; 2134 2135 extern int help(), shell(); 2136 2137 static Command cmdtab[] = { 2138 { "close", closehelp, bye, 1 }, 2139 { "display", displayhelp, display, 0 }, 2140 { "mode", modestring, modecmd, 0 }, 2141 { "open", openhelp, tn, 0 }, 2142 { "quit", quithelp, quit, 0 }, 2143 { "send", sendhelp, sendcmd, 0 }, 2144 { "set", sethelp, setcmd, 0 }, 2145 { "unset", unsethelp, unsetcmd, 0 }, 2146 { "status", statushelp, status, 0 }, 2147 { "toggle", togglestring, toggle, 0 }, 2148 { "slc", slchelp, slccmd, 0 }, 2149 #if defined(TN3270) && defined(unix) 2150 { "transcom", transcomhelp, settranscom, 0 }, 2151 #endif /* defined(TN3270) && defined(unix) */ 2152 #if defined(unix) 2153 { "z", zhelp, suspend, 0 }, 2154 #endif /* defined(unix) */ 2155 #if defined(TN3270) 2156 { "!", shellhelp, shell, 1 }, 2157 #else 2158 { "!", shellhelp, shell, 0 }, 2159 #endif 2160 { "environ", envhelp, env_cmd, 0 }, 2161 { "?", helphelp, help, 0 }, 2162 0 2163 }; 2164 2165 static char crmodhelp[] = "deprecated command -- use 'toggle crmod' instead"; 2166 static char escapehelp[] = "deprecated command -- use 'set escape' instead"; 2167 2168 static Command cmdtab2[] = { 2169 { "help", 0, help, 0 }, 2170 { "escape", escapehelp, setescape, 0 }, 2171 { "crmod", crmodhelp, togcrmod, 0 }, 2172 0 2173 }; 2174 2175 2176 /* 2177 * Call routine with argc, argv set from args (terminated by 0). 2178 */ 2179 2180 /*VARARGS1*/ 2181 static 2182 call(va_alist) 2183 va_dcl 2184 { 2185 va_list ap; 2186 typedef int (*intrtn_t)(); 2187 intrtn_t routine; 2188 char *args[100]; 2189 int argno = 0; 2190 2191 va_start(ap); 2192 routine = (va_arg(ap, intrtn_t)); 2193 while ((args[argno++] = va_arg(ap, char *)) != 0) { 2194 ; 2195 } 2196 va_end(ap); 2197 return (*routine)(argno-1, args); 2198 } 2199 2200 2201 static char ** 2202 getnextcmd(name) 2203 char *name; 2204 { 2205 Command *c = (Command *) name; 2206 2207 return (char **) (c+1); 2208 } 2209 2210 static Command * 2211 getcmd(name) 2212 char *name; 2213 { 2214 Command *cm; 2215 2216 if ((cm = (Command *) genget(name, (char **) cmdtab, getnextcmd)) != 0) { 2217 return cm; 2218 } else { 2219 return (Command *) genget(name, (char **) cmdtab2, getnextcmd); 2220 } 2221 } 2222 2223 void 2224 command(top, tbuf, cnt) 2225 int top; 2226 char *tbuf; 2227 int cnt; 2228 { 2229 register Command *c; 2230 2231 setcommandmode(); 2232 if (!top) { 2233 putchar('\n'); 2234 #if defined(unix) 2235 } else { 2236 (void) signal(SIGINT, SIG_DFL); 2237 (void) signal(SIGQUIT, SIG_DFL); 2238 #endif /* defined(unix) */ 2239 } 2240 for (;;) { 2241 printf("%s> ", prompt); 2242 if (tbuf) { 2243 register char *cp; 2244 cp = line; 2245 while (cnt > 0 && (*cp++ = *tbuf++) != '\n') 2246 cnt--; 2247 tbuf = 0; 2248 if (cp == line || *--cp != '\n' || cp == line) 2249 goto getline; 2250 *cp = '\0'; 2251 printf("%s\n", line); 2252 } else { 2253 getline: 2254 if (gets(line) == NULL) { 2255 if (feof(stdin) || ferror(stdin)) { 2256 (void) quit(); 2257 /*NOTREACHED*/ 2258 } 2259 break; 2260 } 2261 } 2262 if (line[0] == 0) 2263 break; 2264 makeargv(); 2265 if (margv[0] == 0) { 2266 break; 2267 } 2268 c = getcmd(margv[0]); 2269 if (Ambiguous(c)) { 2270 printf("?Ambiguous command\n"); 2271 continue; 2272 } 2273 if (c == 0) { 2274 printf("?Invalid command\n"); 2275 continue; 2276 } 2277 if (c->needconnect && !connected) { 2278 printf("?Need to be connected first.\n"); 2279 continue; 2280 } 2281 if ((*c->handler)(margc, margv)) { 2282 break; 2283 } 2284 } 2285 if (!top) { 2286 if (!connected) { 2287 longjmp(toplevel, 1); 2288 /*NOTREACHED*/ 2289 } 2290 #if defined(TN3270) 2291 if (shell_active == 0) { 2292 setconnmode(0); 2293 } 2294 #else /* defined(TN3270) */ 2295 setconnmode(0); 2296 #endif /* defined(TN3270) */ 2297 } 2298 } 2299 2300 /* 2301 * Help command. 2302 */ 2303 static 2304 help(argc, argv) 2305 int argc; 2306 char *argv[]; 2307 { 2308 register Command *c; 2309 2310 if (argc == 1) { 2311 printf("Commands may be abbreviated. Commands are:\n\n"); 2312 for (c = cmdtab; c->name; c++) 2313 if (c->help) { 2314 printf("%-*s\t%s\n", HELPINDENT, c->name, 2315 c->help); 2316 } 2317 return 0; 2318 } 2319 while (--argc > 0) { 2320 register char *arg; 2321 arg = *++argv; 2322 c = getcmd(arg); 2323 if (Ambiguous(c)) 2324 printf("?Ambiguous help command %s\n", arg); 2325 else if (c == (Command *)0) 2326 printf("?Invalid help command %s\n", arg); 2327 else 2328 printf("%s\n", c->help); 2329 } 2330 return 0; 2331 } 2332 2333 static char *rcname = 0; 2334 static char rcbuf[128]; 2335 2336 cmdrc(m1, m2) 2337 char *m1, *m2; 2338 { 2339 register Command *c; 2340 FILE *rcfile; 2341 int gotmachine = 0; 2342 int l1 = strlen(m1); 2343 int l2 = strlen(m2); 2344 char m1save[64]; 2345 2346 strcpy(m1save, m1); 2347 m1 = m1save; 2348 2349 if (rcname == 0) { 2350 rcname = getenv("HOME"); 2351 if (rcname) 2352 strcpy(rcbuf, rcname); 2353 else 2354 rcbuf[0] = '\0'; 2355 strcat(rcbuf, "/.telnetrc"); 2356 rcname = rcbuf; 2357 } 2358 2359 if ((rcfile = fopen(rcname, "r")) == 0) { 2360 return; 2361 } 2362 2363 for (;;) { 2364 if (fgets(line, sizeof(line), rcfile) == NULL) 2365 break; 2366 if (line[0] == 0) 2367 break; 2368 if (line[0] == '#') 2369 continue; 2370 if (gotmachine == 0) { 2371 if (isspace(line[0])) 2372 continue; 2373 if (strncasecmp(line, m1, l1) == 0) 2374 strncpy(line, &line[l1], sizeof(line) - l1); 2375 else if (strncasecmp(line, m2, l2) == 0) 2376 strncpy(line, &line[l2], sizeof(line) - l2); 2377 else 2378 continue; 2379 gotmachine = 1; 2380 } else { 2381 if (!isspace(line[0])) { 2382 gotmachine = 0; 2383 continue; 2384 } 2385 } 2386 makeargv(); 2387 if (margv[0] == 0) 2388 continue; 2389 c = getcmd(margv[0]); 2390 if (Ambiguous(c)) { 2391 printf("?Ambiguous command: %s\n", margv[0]); 2392 continue; 2393 } 2394 if (c == 0) { 2395 printf("?Invalid command: %s\n", margv[0]); 2396 continue; 2397 } 2398 /* 2399 * This should never happen... 2400 */ 2401 if (c->needconnect && !connected) { 2402 printf("?Need to be connected first for %s.\n", margv[0]); 2403 continue; 2404 } 2405 (*c->handler)(margc, margv); 2406 } 2407 fclose(rcfile); 2408 } 2409 2410 #if defined(SRCRT) && defined(IPPROTO_IP) 2411 2412 /* 2413 * Source route is handed in as 2414 * [!]@hop1@hop2...[@|:]dst 2415 * If the leading ! is present, it is a 2416 * strict source route, otherwise it is 2417 * assmed to be a loose source route. 2418 * 2419 * We fill in the source route option as 2420 * hop1,hop2,hop3...dest 2421 * and return a pointer to hop1, which will 2422 * be the address to connect() to. 2423 * 2424 * Arguments: 2425 * arg: pointer to route list to decipher 2426 * 2427 * cpp: If *cpp is not equal to NULL, this is a 2428 * pointer to a pointer to a character array 2429 * that should be filled in with the option. 2430 * 2431 * lenp: pointer to an integer that contains the 2432 * length of *cpp if *cpp != NULL. 2433 * 2434 * Return values: 2435 * 2436 * Returns the address of the host to connect to. If the 2437 * return value is -1, there was a syntax error in the 2438 * option, either unknown characters, or too many hosts. 2439 * If the return value is 0, one of the hostnames in the 2440 * path is unknown, and *cpp is set to point to the bad 2441 * hostname. 2442 * 2443 * *cpp: If *cpp was equal to NULL, it will be filled 2444 * in with a pointer to our static area that has 2445 * the option filled in. This will be 32bit aligned. 2446 * 2447 * *lenp: This will be filled in with how long the option 2448 * pointed to by *cpp is. 2449 * 2450 */ 2451 unsigned long 2452 sourceroute(arg, cpp, lenp) 2453 char *arg; 2454 char **cpp; 2455 int *lenp; 2456 { 2457 static char lsr[44]; 2458 char *cp, *cp2, *lsrp, *lsrep, *index(); 2459 register int tmp; 2460 struct in_addr sin_addr; 2461 register struct hostent *host = 0; 2462 register char c; 2463 2464 /* 2465 * Verify the arguments, and make sure we have 2466 * at least 7 bytes for the option. 2467 */ 2468 if (cpp == NULL || lenp == NULL) 2469 return((unsigned long)-1); 2470 if (*cpp != NULL && *lenp < 7) 2471 return((unsigned long)-1); 2472 /* 2473 * Decide whether we have a buffer passed to us, 2474 * or if we need to use our own static buffer. 2475 */ 2476 if (*cpp) { 2477 lsrp = *cpp; 2478 lsrep = lsrp + *lenp; 2479 } else { 2480 *cpp = lsrp = lsr; 2481 lsrep = lsrp + 44; 2482 } 2483 2484 cp = arg; 2485 2486 /* 2487 * Next, decide whether we have a loose source 2488 * route or a strict source route, and fill in 2489 * the begining of the option. 2490 */ 2491 if (*cp == '!') { 2492 cp++; 2493 *lsrp++ = IPOPT_SSRR; 2494 } else 2495 *lsrp++ = IPOPT_LSRR; 2496 2497 if (*cp != '@') 2498 return((unsigned long)-1); 2499 2500 lsrp++; /* skip over length, we'll fill it in later */ 2501 *lsrp++ = 4; 2502 2503 cp++; 2504 2505 sin_addr.s_addr = 0; 2506 2507 for (c = 0;;) { 2508 if (c == ':') 2509 cp2 = 0; 2510 else for (cp2 = cp; c = *cp2; cp2++) { 2511 if (c == ',') { 2512 *cp2++ = '\0'; 2513 if (*cp2 == '@') 2514 cp2++; 2515 } else if (c == '@') { 2516 *cp2++ = '\0'; 2517 } else if (c == ':') { 2518 *cp2++ = '\0'; 2519 } else 2520 continue; 2521 break; 2522 } 2523 if (!c) 2524 cp2 = 0; 2525 2526 if ((tmp = inet_addr(cp)) != -1) { 2527 sin_addr.s_addr = tmp; 2528 } else if (host = gethostbyname(cp)) { 2529 #if defined(h_addr) 2530 memcpy((caddr_t)&sin_addr, 2531 host->h_addr_list[0], host->h_length); 2532 #else 2533 memcpy((caddr_t)&sin_addr, host->h_addr, host->h_length); 2534 #endif 2535 } else { 2536 *cpp = cp; 2537 return(0); 2538 } 2539 memcpy(lsrp, (char *)&sin_addr, 4); 2540 lsrp += 4; 2541 if (cp2) 2542 cp = cp2; 2543 else 2544 break; 2545 /* 2546 * Check to make sure there is space for next address 2547 */ 2548 if (lsrp + 4 > lsrep) 2549 return((unsigned long)-1); 2550 } 2551 if ((*(*cpp+IPOPT_OLEN) = lsrp - *cpp) <= 7) { 2552 *cpp = 0; 2553 *lenp = 0; 2554 return((unsigned long)-1); 2555 } 2556 *lsrp++ = IPOPT_NOP; /* 32 bit word align it */ 2557 *lenp = lsrp - *cpp; 2558 return(sin_addr.s_addr); 2559 } 2560 #endif 2561 2562 #if defined(NOSTRNCASECMP) 2563 strncasecmp(p1, p2, len) 2564 register char *p1, *p2; 2565 int len; 2566 { 2567 while (len--) { 2568 if (tolower(*p1) != tolower(*p2)) 2569 return(tolower(*p1) - tolower(*p2)); 2570 if (*p1 == '\0') 2571 return(0); 2572 p1++, p2++; 2573 } 2574 return(0); 2575 } 2576 #endif 2577