1/* 2 * Copyright (c) 1988, 1990, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34#if 0 35#ifndef lint 36static const char sccsid[] = "@(#)commands.c 8.4 (Berkeley) 5/30/95"; 37#endif 38#endif 39#include <sys/cdefs.h> 40__FBSDID("$FreeBSD: src/contrib/telnet/telnet/commands.c,v 1.35 2005/02/28 12:46:52 tobez Exp $"); 41 42#include <sys/param.h> 43#if (!defined(__BEOS__) && !defined(__HAIKU__)) 44# include <sys/file.h> 45#endif 46#include <sys/socket.h> 47#include <sys/un.h> 48#include <sys/wait.h> 49#include <netinet/in.h> 50 51#include <ctype.h> 52#include <err.h> 53#include <errno.h> 54#include <netdb.h> 55#include <pwd.h> 56#include <signal.h> 57#include <stdarg.h> 58#include <stdlib.h> 59#include <string.h> 60#include <unistd.h> 61 62#include <arpa/telnet.h> 63#include <arpa/inet.h> 64 65#include "general.h" 66 67#include "ring.h" 68 69#include "externs.h" 70#include "defines.h" 71#include "types.h" 72#include "misc.h" 73 74#ifdef AUTHENTICATION 75#include <libtelnet/auth.h> 76#endif 77#ifdef ENCRYPTION 78#include <libtelnet/encrypt.h> 79#endif 80 81//#include <netinet/in_systm.h> 82#include <netinet/ip.h> 83//#include <netinet/ip6.h> 84 85#ifndef MAXHOSTNAMELEN 86#define MAXHOSTNAMELEN 256 87#endif 88 89typedef int (*intrtn_t)(int, char **); 90 91#ifdef AUTHENTICATION 92extern int auth_togdebug(int); 93#endif 94#ifdef ENCRYPTION 95extern int EncryptAutoEnc(int); 96extern int EncryptAutoDec(int); 97extern int EncryptDebug(int); 98extern int EncryptVerbose(int); 99#endif /* ENCRYPTION */ 100#if defined(IPPROTO_IP) && defined(IP_TOS) 101int tos = -1; 102#endif /* defined(IPPROTO_IP) && defined(IP_TOS) */ 103 104char *hostname; 105static char _hostname[MAXHOSTNAMELEN]; 106 107static int help(int, char **); 108static int call(intrtn_t, ...); 109static void cmdrc(char *, char *); 110#ifdef INET6 111static int switch_af(struct addrinfo **); 112#endif 113static int togglehelp(void); 114static int send_tncmd(void (*)(int, int), const char *, char *); 115static int setmod(int); 116static int clearmode(int); 117static int modehelp(void); 118static int sourceroute(struct addrinfo *, char *, char **, int *, int *, int *); 119 120typedef struct { 121 const char *name; /* command name */ 122 const char *help; /* help string (NULL for no help) */ 123 int (*handler)(int, char **); /* routine which executes command */ 124 int needconnect; /* Do we need to be connected to execute? */ 125} Command; 126 127static char line[256]; 128static char saveline[256]; 129static int margc; 130static char *margv[20]; 131 132#ifdef OPIE 133#include <sys/wait.h> 134#define PATH_OPIEKEY "/usr/bin/opiekey" 135static int 136opie_calc(int argc, char *argv[]) 137{ 138 int status; 139 140 if(argc != 3) { 141 printf("%s sequence challenge\n", argv[0]); 142 return (0); 143 } 144 145 switch(fork()) { 146 case 0: 147 execv(PATH_OPIEKEY, argv); 148 exit (1); 149 case -1: 150 perror("fork"); 151 break; 152 default: 153 (void) wait(&status); 154 if (WIFEXITED(status)) 155 return (WEXITSTATUS(status)); 156 } 157 return (0); 158} 159#endif 160 161static void 162makeargv(void) 163{ 164 char *cp, *cp2, c; 165 char **argp = margv; 166 167 margc = 0; 168 cp = line; 169 if (*cp == '!') { /* Special case shell escape */ 170 strcpy(saveline, line); /* save for shell command */ 171 *argp++ = strdup("!"); /* No room in string to get this */ 172 margc++; 173 cp++; 174 } 175 while ((c = *cp)) { 176 int inquote = 0; 177 while (isspace(c)) 178 c = *++cp; 179 if (c == '\0') 180 break; 181 *argp++ = cp; 182 margc += 1; 183 for (cp2 = cp; c != '\0'; c = *++cp) { 184 if (inquote) { 185 if (c == inquote) { 186 inquote = 0; 187 continue; 188 } 189 } else { 190 if (c == '\\') { 191 if ((c = *++cp) == '\0') 192 break; 193 } else if (c == '"') { 194 inquote = '"'; 195 continue; 196 } else if (c == '\'') { 197 inquote = '\''; 198 continue; 199 } else if (isspace(c)) 200 break; 201 } 202 *cp2++ = c; 203 } 204 *cp2 = '\0'; 205 if (c == '\0') 206 break; 207 cp++; 208 } 209 *argp++ = 0; 210} 211 212/* 213 * Make a character string into a number. 214 * 215 * Todo: 1. Could take random integers (12, 0x12, 012, 0b1). 216 */ 217 218static int 219special(char *s) 220{ 221 char c; 222 char b; 223 224 switch (*s) { 225 case '^': 226 b = *++s; 227 if (b == '?') { 228 c = b | 0x40; /* DEL */ 229 } else { 230 c = b & 0x1f; 231 } 232 break; 233 default: 234 c = *s; 235 break; 236 } 237 return c; 238} 239 240/* 241 * Construct a control character sequence 242 * for a special character. 243 */ 244static const char * 245control(cc_t c) 246{ 247 static char buf[5]; 248 /* 249 * The only way I could get the Sun 3.5 compiler 250 * to shut up about 251 * if ((unsigned int)c >= 0x80) 252 * was to assign "c" to an unsigned int variable... 253 * Arggg.... 254 */ 255 unsigned int uic = (unsigned int)c; 256 257 if (uic == 0x7f) 258 return ("^?"); 259 if (c == (cc_t)_POSIX_VDISABLE) { 260 return "off"; 261 } 262 if (uic >= 0x80) { 263 buf[0] = '\\'; 264 buf[1] = ((c>>6)&07) + '0'; 265 buf[2] = ((c>>3)&07) + '0'; 266 buf[3] = (c&07) + '0'; 267 buf[4] = 0; 268 } else if (uic >= 0x20) { 269 buf[0] = c; 270 buf[1] = 0; 271 } else { 272 buf[0] = '^'; 273 buf[1] = '@'+c; 274 buf[2] = 0; 275 } 276 return (buf); 277} 278 279/* 280 * The following are data structures and routines for 281 * the "send" command. 282 * 283 */ 284 285struct sendlist { 286 const char *name; /* How user refers to it (case independent) */ 287 const char *help; /* Help information (0 ==> no help) */ 288 int needconnect; /* Need to be connected */ 289 int narg; /* Number of arguments */ 290 int (*handler)(char *, ...); /* Routine to perform (for special ops) */ 291 int nbyte; /* Number of bytes to send this command */ 292 int what; /* Character to be sent (<0 ==> special) */ 293}; 294 295 296static int 297 send_esc(void), 298 send_help(void), 299 send_docmd(char *), 300 send_dontcmd(char *), 301 send_willcmd(char *), 302 send_wontcmd(char *); 303 304static struct sendlist Sendlist[] = { 305 { "ao", "Send Telnet Abort output", 1, 0, NULL, 2, AO }, 306 { "ayt", "Send Telnet 'Are You There'", 1, 0, NULL, 2, AYT }, 307 { "brk", "Send Telnet Break", 1, 0, NULL, 2, BREAK }, 308 { "break", NULL, 1, 0, NULL, 2, BREAK }, 309 { "ec", "Send Telnet Erase Character", 1, 0, NULL, 2, EC }, 310 { "el", "Send Telnet Erase Line", 1, 0, NULL, 2, EL }, 311 { "escape", "Send current escape character",1, 0, (int (*)(char *, ...))send_esc, 1, 0 }, 312 { "ga", "Send Telnet 'Go Ahead' sequence", 1, 0, NULL, 2, GA }, 313 { "ip", "Send Telnet Interrupt Process",1, 0, NULL, 2, IP }, 314 { "intp", NULL, 1, 0, NULL, 2, IP }, 315 { "interrupt", NULL, 1, 0, NULL, 2, IP }, 316 { "intr", NULL, 1, 0, NULL, 2, IP }, 317 { "nop", "Send Telnet 'No operation'", 1, 0, NULL, 2, NOP }, 318 { "eor", "Send Telnet 'End of Record'", 1, 0, NULL, 2, EOR }, 319 { "abort", "Send Telnet 'Abort Process'", 1, 0, NULL, 2, ABORT }, 320 { "susp", "Send Telnet 'Suspend Process'",1, 0, NULL, 2, SUSP }, 321 { "eof", "Send Telnet End of File Character", 1, 0, NULL, 2, xEOF }, 322 { "synch", "Perform Telnet 'Synch operation'", 1, 0, (int (*)(char *, ...))dosynch, 2, 0 }, 323 { "getstatus", "Send request for STATUS", 1, 0, (int (*)(char *, ...))get_status, 6, 0 }, 324 { "?", "Display send options", 0, 0, (int (*)(char *, ...))send_help, 0, 0 }, 325 { "help", NULL, 0, 0, (int (*)(char *, ...))send_help, 0, 0 }, 326 { "do", NULL, 0, 1, (int (*)(char *, ...))send_docmd, 3, 0 }, 327 { "dont", NULL, 0, 1, (int (*)(char *, ...))send_dontcmd, 3, 0 }, 328 { "will", NULL, 0, 1, (int (*)(char *, ...))send_willcmd, 3, 0 }, 329 { "wont", NULL, 0, 1, (int (*)(char *, ...))send_wontcmd, 3, 0 }, 330 { NULL, NULL, 0, 0, NULL, 0, 0 } 331}; 332 333#define GETSEND(name) ((struct sendlist *) genget(name, (char **) Sendlist, \ 334 sizeof(struct sendlist))) 335 336static int 337sendcmd(int argc, char *argv[]) 338{ 339 int count; /* how many bytes we are going to need to send */ 340 int i; 341 struct sendlist *s; /* pointer to current command */ 342 int success = 0; 343 int needconnect = 0; 344 345 if (argc < 2) { 346 printf("need at least one argument for 'send' command\n"); 347 printf("'send ?' for help\n"); 348 return 0; 349 } 350 /* 351 * First, validate all the send arguments. 352 * In addition, we see how much space we are going to need, and 353 * whether or not we will be doing a "SYNCH" operation (which 354 * flushes the network queue). 355 */ 356 count = 0; 357 for (i = 1; i < argc; i++) { 358 s = GETSEND(argv[i]); 359 if (s == 0) { 360 printf("Unknown send argument '%s'\n'send ?' for help.\n", 361 argv[i]); 362 return 0; 363 } else if (Ambiguous((void *)s)) { 364 printf("Ambiguous send argument '%s'\n'send ?' for help.\n", 365 argv[i]); 366 return 0; 367 } 368 if (i + s->narg >= argc) { 369 fprintf(stderr, 370 "Need %d argument%s to 'send %s' command. 'send %s ?' for help.\n", 371 s->narg, s->narg == 1 ? "" : "s", s->name, s->name); 372 return 0; 373 } 374 count += s->nbyte; 375 if ((void *)s->handler == (void *)send_help) { 376 send_help(); 377 return 0; 378 } 379 380 i += s->narg; 381 needconnect += s->needconnect; 382 } 383 if (!connected && needconnect) { 384 printf("?Need to be connected first.\n"); 385 printf("'send ?' for help\n"); 386 return 0; 387 } 388 /* Now, do we have enough room? */ 389 if (NETROOM() < count) { 390 printf("There is not enough room in the buffer TO the network\n"); 391 printf("to process your request. Nothing will be done.\n"); 392 printf("('send synch' will throw away most data in the network\n"); 393 printf("buffer, if this might help.)\n"); 394 return 0; 395 } 396 /* OK, they are all OK, now go through again and actually send */ 397 count = 0; 398 for (i = 1; i < argc; i++) { 399 if ((s = GETSEND(argv[i])) == 0) { 400 fprintf(stderr, "Telnet 'send' error - argument disappeared!\n"); 401 quit(); 402 /*NOTREACHED*/ 403 } 404 if (s->handler) { 405 count++; 406 success += (*s->handler)((s->narg > 0) ? argv[i+1] : 0, 407 (s->narg > 1) ? argv[i+2] : 0); 408 i += s->narg; 409 } else { 410 NET2ADD(IAC, s->what); 411 printoption("SENT", IAC, s->what); 412 } 413 } 414 return (count == success); 415} 416 417static int 418send_esc(void) 419{ 420 NETADD(escape); 421 return 1; 422} 423 424static int 425send_docmd(char *name) 426{ 427 return(send_tncmd(send_do, "do", name)); 428} 429 430static int 431send_dontcmd(name) 432 char *name; 433{ 434 return(send_tncmd(send_dont, "dont", name)); 435} 436 437static int 438send_willcmd(char *name) 439{ 440 return(send_tncmd(send_will, "will", name)); 441} 442 443static int 444send_wontcmd(char *name) 445{ 446 return(send_tncmd(send_wont, "wont", name)); 447} 448 449static int 450send_tncmd(void (*func)(int, int), const char *cmd, char *name) 451{ 452 char **cpp; 453 extern char *telopts[]; 454 int val = 0; 455 456 if (isprefix(name, "help") || isprefix(name, "?")) { 457 int col, len; 458 459 printf("usage: send %s <value|option>\n", cmd); 460 printf("\"value\" must be from 0 to 255\n"); 461 printf("Valid options are:\n\t"); 462 463 col = 8; 464 for (cpp = telopts; *cpp; cpp++) { 465 len = strlen(*cpp) + 3; 466 if (col + len > 65) { 467 printf("\n\t"); 468 col = 8; 469 } 470 printf(" \"%s\"", *cpp); 471 col += len; 472 } 473 printf("\n"); 474 return 0; 475 } 476 cpp = (char **)genget(name, telopts, sizeof(char *)); 477 if (Ambiguous(cpp)) { 478 fprintf(stderr,"'%s': ambiguous argument ('send %s ?' for help).\n", 479 name, cmd); 480 return 0; 481 } 482 if (cpp) { 483 val = cpp - telopts; 484 } else { 485 char *cp = name; 486 487 while (*cp >= '0' && *cp <= '9') { 488 val *= 10; 489 val += *cp - '0'; 490 cp++; 491 } 492 if (*cp != 0) { 493 fprintf(stderr, "'%s': unknown argument ('send %s ?' for help).\n", 494 name, cmd); 495 return 0; 496 } else if (val < 0 || val > 255) { 497 fprintf(stderr, "'%s': bad value ('send %s ?' for help).\n", 498 name, cmd); 499 return 0; 500 } 501 } 502 if (!connected) { 503 printf("?Need to be connected first.\n"); 504 return 0; 505 } 506 (*func)(val, 1); 507 return 1; 508} 509 510static int 511send_help(void) 512{ 513 struct sendlist *s; /* pointer to current command */ 514 for (s = Sendlist; s->name; s++) { 515 if (s->help) 516 printf("%-15s %s\n", s->name, s->help); 517 } 518 return(0); 519} 520 521/* 522 * The following are the routines and data structures referred 523 * to by the arguments to the "toggle" command. 524 */ 525 526static int 527lclchars(void) 528{ 529 donelclchars = 1; 530 return 1; 531} 532 533static int 534togdebug(void) 535{ 536#ifndef NOT43 537 if (net > 0 && 538 (SetSockOpt(net, SOL_SOCKET, SO_DEBUG, telnet_debug)) < 0) { 539 perror("setsockopt (SO_DEBUG)"); 540 } 541#else /* NOT43 */ 542 if (telnet_debug) { 543 if (net > 0 && SetSockOpt(net, SOL_SOCKET, SO_DEBUG, 1) < 0) 544 perror("setsockopt (SO_DEBUG)"); 545 } else 546 printf("Cannot turn off socket debugging\n"); 547#endif /* NOT43 */ 548 return 1; 549} 550 551 552static int 553togcrlf(void) 554{ 555 if (crlf) { 556 printf("Will send carriage returns as telnet <CR><LF>.\n"); 557 } else { 558 printf("Will send carriage returns as telnet <CR><NUL>.\n"); 559 } 560 return 1; 561} 562 563int binmode; 564 565static int 566togbinary(int val) 567{ 568 donebinarytoggle = 1; 569 570 if (val >= 0) { 571 binmode = val; 572 } else { 573 if (my_want_state_is_will(TELOPT_BINARY) && 574 my_want_state_is_do(TELOPT_BINARY)) { 575 binmode = 1; 576 } else if (my_want_state_is_wont(TELOPT_BINARY) && 577 my_want_state_is_dont(TELOPT_BINARY)) { 578 binmode = 0; 579 } 580 val = binmode ? 0 : 1; 581 } 582 583 if (val == 1) { 584 if (my_want_state_is_will(TELOPT_BINARY) && 585 my_want_state_is_do(TELOPT_BINARY)) { 586 printf("Already operating in binary mode with remote host.\n"); 587 } else { 588 printf("Negotiating binary mode with remote host.\n"); 589 tel_enter_binary(3); 590 } 591 } else { 592 if (my_want_state_is_wont(TELOPT_BINARY) && 593 my_want_state_is_dont(TELOPT_BINARY)) { 594 printf("Already in network ascii mode with remote host.\n"); 595 } else { 596 printf("Negotiating network ascii mode with remote host.\n"); 597 tel_leave_binary(3); 598 } 599 } 600 return 1; 601} 602 603static int 604togrbinary(int val) 605{ 606 donebinarytoggle = 1; 607 608 if (val == -1) 609 val = my_want_state_is_do(TELOPT_BINARY) ? 0 : 1; 610 611 if (val == 1) { 612 if (my_want_state_is_do(TELOPT_BINARY)) { 613 printf("Already receiving in binary mode.\n"); 614 } else { 615 printf("Negotiating binary mode on input.\n"); 616 tel_enter_binary(1); 617 } 618 } else { 619 if (my_want_state_is_dont(TELOPT_BINARY)) { 620 printf("Already receiving in network ascii mode.\n"); 621 } else { 622 printf("Negotiating network ascii mode on input.\n"); 623 tel_leave_binary(1); 624 } 625 } 626 return 1; 627} 628 629static int 630togxbinary(int val) 631{ 632 donebinarytoggle = 1; 633 634 if (val == -1) 635 val = my_want_state_is_will(TELOPT_BINARY) ? 0 : 1; 636 637 if (val == 1) { 638 if (my_want_state_is_will(TELOPT_BINARY)) { 639 printf("Already transmitting in binary mode.\n"); 640 } else { 641 printf("Negotiating binary mode on output.\n"); 642 tel_enter_binary(2); 643 } 644 } else { 645 if (my_want_state_is_wont(TELOPT_BINARY)) { 646 printf("Already transmitting in network ascii mode.\n"); 647 } else { 648 printf("Negotiating network ascii mode on output.\n"); 649 tel_leave_binary(2); 650 } 651 } 652 return 1; 653} 654 655struct togglelist { 656 const char *name; /* name of toggle */ 657 const char *help; /* help message */ 658 int (*handler)(int); /* routine to do actual setting */ 659 int *variable; 660 const char *actionexplanation; 661}; 662 663static struct togglelist Togglelist[] = { 664 { "autoflush", 665 "flushing of output when sending interrupt characters", 666 0, 667 &autoflush, 668 "flush output when sending interrupt characters" }, 669 { "autosynch", 670 "automatic sending of interrupt characters in urgent mode", 671 0, 672 &autosynch, 673 "send interrupt characters in urgent mode" }, 674#ifdef AUTHENTICATION 675 { "autologin", 676 "automatic sending of login and/or authentication info", 677 0, 678 &autologin, 679 "send login name and/or authentication information" }, 680 { "authdebug", 681 "Toggle authentication debugging", 682 auth_togdebug, 683 0, 684 "print authentication debugging information" }, 685#endif 686#ifdef ENCRYPTION 687 { "autoencrypt", 688 "automatic encryption of data stream", 689 EncryptAutoEnc, 690 0, 691 "automatically encrypt output" }, 692 { "autodecrypt", 693 "automatic decryption of data stream", 694 EncryptAutoDec, 695 0, 696 "automatically decrypt input" }, 697 { "verbose_encrypt", 698 "Toggle verbose encryption output", 699 EncryptVerbose, 700 0, 701 "print verbose encryption output" }, 702 { "encdebug", 703 "Toggle encryption debugging", 704 EncryptDebug, 705 0, 706 "print encryption debugging information" }, 707#endif /* ENCRYPTION */ 708 { "skiprc", 709 "don't read ~/.telnetrc file", 710 0, 711 &skiprc, 712 "skip reading of ~/.telnetrc file" }, 713 { "binary", 714 "sending and receiving of binary data", 715 togbinary, 716 0, 717 0 }, 718 { "inbinary", 719 "receiving of binary data", 720 togrbinary, 721 0, 722 0 }, 723 { "outbinary", 724 "sending of binary data", 725 togxbinary, 726 0, 727 0 }, 728 { "crlf", 729 "sending carriage returns as telnet <CR><LF>", 730 (int (*)(int))togcrlf, 731 &crlf, 732 0 }, 733 { "crmod", 734 "mapping of received carriage returns", 735 0, 736 &crmod, 737 "map carriage return on output" }, 738 { "localchars", 739 "local recognition of certain control characters", 740 (int (*)(int))lclchars, 741 &localchars, 742 "recognize certain control characters" }, 743 { " ", "", NULL, NULL, NULL }, /* empty line */ 744 { "debug", 745 "debugging", 746 (int (*)(int))togdebug, 747 &telnet_debug, 748 "turn on socket level debugging" }, 749 { "netdata", 750 "printing of hexadecimal network data (debugging)", 751 0, 752 &netdata, 753 "print hexadecimal representation of network traffic" }, 754 { "prettydump", 755 "output of \"netdata\" to user readable format (debugging)", 756 0, 757 &prettydump, 758 "print user readable output for \"netdata\"" }, 759 { "options", 760 "viewing of options processing (debugging)", 761 0, 762 &showoptions, 763 "show option processing" }, 764 { "termdata", 765 "(debugging) toggle printing of hexadecimal terminal data", 766 0, 767 &termdata, 768 "print hexadecimal representation of terminal traffic" }, 769 { "?", 770 NULL, 771 (int (*)(int))togglehelp, 772 NULL, 773 NULL }, 774 { NULL, NULL, NULL, NULL, NULL }, 775 { "help", 776 NULL, 777 (int (*)(int))togglehelp, 778 NULL, 779 NULL }, 780 { NULL, NULL, NULL, NULL, NULL } 781}; 782 783static int 784togglehelp(void) 785{ 786 struct togglelist *c; 787 788 for (c = Togglelist; c->name; c++) { 789 if (c->help) { 790 if (*c->help) 791 printf("%-15s toggle %s\n", c->name, c->help); 792 else 793 printf("\n"); 794 } 795 } 796 printf("\n"); 797 printf("%-15s %s\n", "?", "display help information"); 798 return 0; 799} 800 801static void 802settogglehelp(int set) 803{ 804 struct togglelist *c; 805 806 for (c = Togglelist; c->name; c++) { 807 if (c->help) { 808 if (*c->help) 809 printf("%-15s %s %s\n", c->name, set ? "enable" : "disable", 810 c->help); 811 else 812 printf("\n"); 813 } 814 } 815} 816 817#define GETTOGGLE(name) (struct togglelist *) \ 818 genget(name, (char **) Togglelist, sizeof(struct togglelist)) 819 820static int 821toggle(int argc, char *argv[]) 822{ 823 int retval = 1; 824 char *name; 825 struct togglelist *c; 826 827 if (argc < 2) { 828 fprintf(stderr, 829 "Need an argument to 'toggle' command. 'toggle ?' for help.\n"); 830 return 0; 831 } 832 argc--; 833 argv++; 834 while (argc--) { 835 name = *argv++; 836 c = GETTOGGLE(name); 837 if (Ambiguous((void *)c)) { 838 fprintf(stderr, "'%s': ambiguous argument ('toggle ?' for help).\n", 839 name); 840 return 0; 841 } else if (c == 0) { 842 fprintf(stderr, "'%s': unknown argument ('toggle ?' for help).\n", 843 name); 844 return 0; 845 } else { 846 if (c->variable) { 847 *c->variable = !*c->variable; /* invert it */ 848 if (c->actionexplanation) { 849 printf("%s %s.\n", *c->variable? "Will" : "Won't", 850 c->actionexplanation); 851 } 852 } 853 if (c->handler) { 854 retval &= (*c->handler)(-1); 855 } 856 } 857 } 858 return retval; 859} 860 861/* 862 * The following perform the "set" command. 863 */ 864 865#ifdef USE_TERMIO 866struct termio new_tc; 867#endif 868 869struct setlist { 870 const char *name; /* name */ 871 const char *help; /* help information */ 872 void (*handler)(char *); 873 cc_t *charp; /* where it is located at */ 874}; 875 876static struct setlist Setlist[] = { 877#ifdef KLUDGELINEMODE 878 { "echo", "character to toggle local echoing on/off", NULL, &echoc }, 879#endif 880 { "escape", "character to escape back to telnet command mode", NULL, &escape }, 881 { "rlogin", "rlogin escape character", 0, &rlogin }, 882 { "tracefile", "file to write trace information to", SetNetTrace, (cc_t *)NetTraceFile}, 883 { " ", "", NULL, NULL }, 884 { " ", "The following need 'localchars' to be toggled true", NULL, NULL }, 885 { "flushoutput", "character to cause an Abort Output", NULL, termFlushCharp }, 886 { "interrupt", "character to cause an Interrupt Process", NULL, termIntCharp }, 887 { "quit", "character to cause an Abort process", NULL, termQuitCharp }, 888 { "eof", "character to cause an EOF ", NULL, termEofCharp }, 889 { " ", "", NULL, NULL }, 890 { " ", "The following are for local editing in linemode", NULL, NULL }, 891 { "erase", "character to use to erase a character", NULL, termEraseCharp }, 892 { "kill", "character to use to erase a line", NULL, termKillCharp }, 893 { "lnext", "character to use for literal next", NULL, termLiteralNextCharp }, 894 { "susp", "character to cause a Suspend Process", NULL, termSuspCharp }, 895 { "reprint", "character to use for line reprint", NULL, termRprntCharp }, 896 { "worderase", "character to use to erase a word", NULL, termWerasCharp }, 897 { "start", "character to use for XON", NULL, termStartCharp }, 898 { "stop", "character to use for XOFF", NULL, termStopCharp }, 899 { "forw1", "alternate end of line character", NULL, termForw1Charp }, 900 { "forw2", "alternate end of line character", NULL, termForw2Charp }, 901 { "ayt", "alternate AYT character", NULL, termAytCharp }, 902 { NULL, NULL, NULL, NULL } 903}; 904 905static struct setlist * 906getset(char *name) 907{ 908 return (struct setlist *) 909 genget(name, (char **) Setlist, sizeof(struct setlist)); 910} 911 912void 913set_escape_char(char *s) 914{ 915 if (rlogin != _POSIX_VDISABLE) { 916 rlogin = (s && *s) ? special(s) : _POSIX_VDISABLE; 917 printf("Telnet rlogin escape character is '%s'.\n", 918 control(rlogin)); 919 } else { 920 escape = (s && *s) ? special(s) : _POSIX_VDISABLE; 921 printf("Telnet escape character is '%s'.\n", control(escape)); 922 } 923} 924 925static int 926setcmd(int argc, char *argv[]) 927{ 928 int value; 929 struct setlist *ct; 930 struct togglelist *c; 931 932 if (argc < 2 || argc > 3) { 933 printf("Format is 'set Name Value'\n'set ?' for help.\n"); 934 return 0; 935 } 936 if ((argc == 2) && (isprefix(argv[1], "?") || isprefix(argv[1], "help"))) { 937 for (ct = Setlist; ct->name; ct++) 938 printf("%-15s %s\n", ct->name, ct->help); 939 printf("\n"); 940 settogglehelp(1); 941 printf("%-15s %s\n", "?", "display help information"); 942 return 0; 943 } 944 945 ct = getset(argv[1]); 946 if (ct == 0) { 947 c = GETTOGGLE(argv[1]); 948 if (c == 0) { 949 fprintf(stderr, "'%s': unknown argument ('set ?' for help).\n", 950 argv[1]); 951 return 0; 952 } else if (Ambiguous((void *)c)) { 953 fprintf(stderr, "'%s': ambiguous argument ('set ?' for help).\n", 954 argv[1]); 955 return 0; 956 } 957 if (c->variable) { 958 if ((argc == 2) || (strcmp("on", argv[2]) == 0)) 959 *c->variable = 1; 960 else if (strcmp("off", argv[2]) == 0) 961 *c->variable = 0; 962 else { 963 printf("Format is 'set togglename [on|off]'\n'set ?' for help.\n"); 964 return 0; 965 } 966 if (c->actionexplanation) { 967 printf("%s %s.\n", *c->variable? "Will" : "Won't", 968 c->actionexplanation); 969 } 970 } 971 if (c->handler) 972 (*c->handler)(1); 973 } else if (argc != 3) { 974 printf("Format is 'set Name Value'\n'set ?' for help.\n"); 975 return 0; 976 } else if (Ambiguous((void *)ct)) { 977 fprintf(stderr, "'%s': ambiguous argument ('set ?' for help).\n", 978 argv[1]); 979 return 0; 980 } else if (ct->handler) { 981 (*ct->handler)(argv[2]); 982 printf("%s set to \"%s\".\n", ct->name, (char *)ct->charp); 983 } else { 984 if (strcmp("off", argv[2])) { 985 value = special(argv[2]); 986 } else { 987 value = _POSIX_VDISABLE; 988 } 989 *(ct->charp) = (cc_t)value; 990 printf("%s character is '%s'.\n", ct->name, control(*(ct->charp))); 991 } 992 slc_check(); 993 return 1; 994} 995 996static int 997unsetcmd(int argc, char *argv[]) 998{ 999 struct setlist *ct; 1000 struct togglelist *c; 1001 char *name; 1002 1003 if (argc < 2) { 1004 fprintf(stderr, 1005 "Need an argument to 'unset' command. 'unset ?' for help.\n"); 1006 return 0; 1007 } 1008 if (isprefix(argv[1], "?") || isprefix(argv[1], "help")) { 1009 for (ct = Setlist; ct->name; ct++) 1010 printf("%-15s %s\n", ct->name, ct->help); 1011 printf("\n"); 1012 settogglehelp(0); 1013 printf("%-15s %s\n", "?", "display help information"); 1014 return 0; 1015 } 1016 1017 argc--; 1018 argv++; 1019 while (argc--) { 1020 name = *argv++; 1021 ct = getset(name); 1022 if (ct == 0) { 1023 c = GETTOGGLE(name); 1024 if (c == 0) { 1025 fprintf(stderr, "'%s': unknown argument ('unset ?' for help).\n", 1026 name); 1027 return 0; 1028 } else if (Ambiguous((void *)c)) { 1029 fprintf(stderr, "'%s': ambiguous argument ('unset ?' for help).\n", 1030 name); 1031 return 0; 1032 } 1033 if (c->variable) { 1034 *c->variable = 0; 1035 if (c->actionexplanation) { 1036 printf("%s %s.\n", *c->variable? "Will" : "Won't", 1037 c->actionexplanation); 1038 } 1039 } 1040 if (c->handler) 1041 (*c->handler)(0); 1042 } else if (Ambiguous((void *)ct)) { 1043 fprintf(stderr, "'%s': ambiguous argument ('unset ?' for help).\n", 1044 name); 1045 return 0; 1046 } else if (ct->handler) { 1047 (*ct->handler)(0); 1048 printf("%s reset to \"%s\".\n", ct->name, (char *)ct->charp); 1049 } else { 1050 *(ct->charp) = _POSIX_VDISABLE; 1051 printf("%s character is '%s'.\n", ct->name, control(*(ct->charp))); 1052 } 1053 } 1054 return 1; 1055} 1056 1057/* 1058 * The following are the data structures and routines for the 1059 * 'mode' command. 1060 */ 1061#ifdef KLUDGELINEMODE 1062extern int kludgelinemode; 1063 1064static int 1065dokludgemode(void) 1066{ 1067 kludgelinemode = 1; 1068 send_wont(TELOPT_LINEMODE, 1); 1069 send_dont(TELOPT_SGA, 1); 1070 send_dont(TELOPT_ECHO, 1); 1071 return 1; 1072} 1073#endif 1074 1075static int 1076dolinemode(void) 1077{ 1078#ifdef KLUDGELINEMODE 1079 if (kludgelinemode) 1080 send_dont(TELOPT_SGA, 1); 1081#endif 1082 send_will(TELOPT_LINEMODE, 1); 1083 send_dont(TELOPT_ECHO, 1); 1084 return 1; 1085} 1086 1087static int 1088docharmode(void) 1089{ 1090#ifdef KLUDGELINEMODE 1091 if (kludgelinemode) 1092 send_do(TELOPT_SGA, 1); 1093 else 1094#endif 1095 send_wont(TELOPT_LINEMODE, 1); 1096 send_do(TELOPT_ECHO, 1); 1097 return 1; 1098} 1099 1100static int 1101dolmmode(int bit, int on) 1102{ 1103 unsigned char c; 1104 extern int linemode; 1105 1106 if (my_want_state_is_wont(TELOPT_LINEMODE)) { 1107 printf("?Need to have LINEMODE option enabled first.\n"); 1108 printf("'mode ?' for help.\n"); 1109 return 0; 1110 } 1111 1112 if (on) 1113 c = (linemode | bit); 1114 else 1115 c = (linemode & ~bit); 1116 lm_mode(&c, 1, 1); 1117 return 1; 1118} 1119 1120static int 1121setmod(int bit) 1122{ 1123 return dolmmode(bit, 1); 1124} 1125 1126static int 1127clearmode(int bit) 1128{ 1129 return dolmmode(bit, 0); 1130} 1131 1132struct modelist { 1133 const char *name; /* command name */ 1134 const char *help; /* help string */ 1135 int (*handler)(int);/* routine which executes command */ 1136 int needconnect; /* Do we need to be connected to execute? */ 1137 int arg1; 1138}; 1139 1140static struct modelist ModeList[] = { 1141 { "character", "Disable LINEMODE option", (int (*)(int))docharmode, 1, 0 }, 1142#ifdef KLUDGELINEMODE 1143 { "", "(or disable obsolete line-by-line mode)", NULL, 0, 0 }, 1144#endif 1145 { "line", "Enable LINEMODE option", (int (*)(int))dolinemode, 1, 0 }, 1146#ifdef KLUDGELINEMODE 1147 { "", "(or enable obsolete line-by-line mode)", NULL, 0, 0 }, 1148#endif 1149 { "", "", NULL, 0, 0 }, 1150 { "", "These require the LINEMODE option to be enabled", NULL, 0, 0 }, 1151 { "isig", "Enable signal trapping", setmod, 1, MODE_TRAPSIG }, 1152 { "+isig", 0, setmod, 1, MODE_TRAPSIG }, 1153 { "-isig", "Disable signal trapping", clearmode, 1, MODE_TRAPSIG }, 1154 { "edit", "Enable character editing", setmod, 1, MODE_EDIT }, 1155 { "+edit", 0, setmod, 1, MODE_EDIT }, 1156 { "-edit", "Disable character editing", clearmode, 1, MODE_EDIT }, 1157 { "softtabs", "Enable tab expansion", setmod, 1, MODE_SOFT_TAB }, 1158 { "+softtabs", 0, setmod, 1, MODE_SOFT_TAB }, 1159 { "-softtabs", "Disable character editing", clearmode, 1, MODE_SOFT_TAB }, 1160 { "litecho", "Enable literal character echo", setmod, 1, MODE_LIT_ECHO }, 1161 { "+litecho", 0, setmod, 1, MODE_LIT_ECHO }, 1162 { "-litecho", "Disable literal character echo", clearmode, 1, MODE_LIT_ECHO }, 1163 { "help", 0, (int (*)(int))modehelp, 0, 0 }, 1164#ifdef KLUDGELINEMODE 1165 { "kludgeline", 0, (int (*)(int))dokludgemode, 1, 0 }, 1166#endif 1167 { "", "", NULL, 0, 0 }, 1168 { "?", "Print help information", (int (*)(int))modehelp, 0, 0 }, 1169 { NULL, NULL, NULL, 0, 0 }, 1170}; 1171 1172 1173static int 1174modehelp(void) 1175{ 1176 struct modelist *mt; 1177 1178 printf("format is: 'mode Mode', where 'Mode' is one of:\n\n"); 1179 for (mt = ModeList; mt->name; mt++) { 1180 if (mt->help) { 1181 if (*mt->help) 1182 printf("%-15s %s\n", mt->name, mt->help); 1183 else 1184 printf("\n"); 1185 } 1186 } 1187 return 0; 1188} 1189 1190#define GETMODECMD(name) (struct modelist *) \ 1191 genget(name, (char **) ModeList, sizeof(struct modelist)) 1192 1193static int 1194modecmd(int argc, char *argv[]) 1195{ 1196 struct modelist *mt; 1197 1198 if (argc != 2) { 1199 printf("'mode' command requires an argument\n"); 1200 printf("'mode ?' for help.\n"); 1201 } else if ((mt = GETMODECMD(argv[1])) == 0) { 1202 fprintf(stderr, "Unknown mode '%s' ('mode ?' for help).\n", argv[1]); 1203 } else if (Ambiguous((void *)mt)) { 1204 fprintf(stderr, "Ambiguous mode '%s' ('mode ?' for help).\n", argv[1]); 1205 } else if (mt->needconnect && !connected) { 1206 printf("?Need to be connected first.\n"); 1207 printf("'mode ?' for help.\n"); 1208 } else if (mt->handler) { 1209 return (*mt->handler)(mt->arg1); 1210 } 1211 return 0; 1212} 1213 1214/* 1215 * The following data structures and routines implement the 1216 * "display" command. 1217 */ 1218 1219static int 1220display(int argc, char *argv[]) 1221{ 1222 struct togglelist *tl; 1223 struct setlist *sl; 1224 1225#define dotog(tl) if (tl->variable && tl->actionexplanation) { \ 1226 if (*tl->variable) { \ 1227 printf("will"); \ 1228 } else { \ 1229 printf("won't"); \ 1230 } \ 1231 printf(" %s.\n", tl->actionexplanation); \ 1232 } 1233 1234#define doset(sl) if (sl->name && *sl->name != ' ') { \ 1235 if (sl->handler == 0) \ 1236 printf("%-15s [%s]\n", sl->name, control(*sl->charp)); \ 1237 else \ 1238 printf("%-15s \"%s\"\n", sl->name, (char *)sl->charp); \ 1239 } 1240 1241 if (argc == 1) { 1242 for (tl = Togglelist; tl->name; tl++) { 1243 dotog(tl); 1244 } 1245 printf("\n"); 1246 for (sl = Setlist; sl->name; sl++) { 1247 doset(sl); 1248 } 1249 } else { 1250 int i; 1251 1252 for (i = 1; i < argc; i++) { 1253 sl = getset(argv[i]); 1254 tl = GETTOGGLE(argv[i]); 1255 if (Ambiguous((void *)sl) || Ambiguous((void *)tl)) { 1256 printf("?Ambiguous argument '%s'.\n", argv[i]); 1257 return 0; 1258 } else if (!sl && !tl) { 1259 printf("?Unknown argument '%s'.\n", argv[i]); 1260 return 0; 1261 } else { 1262 if (tl) { 1263 dotog(tl); 1264 } 1265 if (sl) { 1266 doset(sl); 1267 } 1268 } 1269 } 1270 } 1271/*@*/optionstatus(); 1272#ifdef ENCRYPTION 1273 EncryptStatus(); 1274#endif /* ENCRYPTION */ 1275 return 1; 1276#undef doset 1277#undef dotog 1278} 1279 1280/* 1281 * The following are the data structures, and many of the routines, 1282 * relating to command processing. 1283 */ 1284 1285/* 1286 * Set the escape character. 1287 */ 1288static int 1289setescape(int argc, char *argv[]) 1290{ 1291 char *arg; 1292 char buf[50]; 1293 1294 printf( 1295 "Deprecated usage - please use 'set escape%s%s' in the future.\n", 1296 (argc > 2)? " ":"", (argc > 2)? argv[1]: ""); 1297 if (argc > 2) 1298 arg = argv[1]; 1299 else { 1300 printf("new escape character: "); 1301 (void) fgets(buf, sizeof(buf), stdin); 1302 arg = buf; 1303 } 1304 if (arg[0] != '\0') 1305 escape = arg[0]; 1306 (void) fflush(stdout); 1307 return 1; 1308} 1309 1310static int 1311togcrmod(void) 1312{ 1313 crmod = !crmod; 1314 printf("Deprecated usage - please use 'toggle crmod' in the future.\n"); 1315 printf("%s map carriage return on output.\n", crmod ? "Will" : "Won't"); 1316 (void) fflush(stdout); 1317 return 1; 1318} 1319 1320static int 1321suspend(void) 1322{ 1323#ifdef SIGTSTP 1324 setcommandmode(); 1325 { 1326 long oldrows, oldcols, newrows, newcols, err_; 1327 1328 err_ = (TerminalWindowSize(&oldrows, &oldcols) == 0) ? 1 : 0; 1329 (void) kill(0, SIGTSTP); 1330 /* 1331 * If we didn't get the window size before the SUSPEND, but we 1332 * can get them now (?), then send the NAWS to make sure that 1333 * we are set up for the right window size. 1334 */ 1335 if (TerminalWindowSize(&newrows, &newcols) && connected && 1336 (err_ || ((oldrows != newrows) || (oldcols != newcols)))) { 1337 sendnaws(); 1338 } 1339 } 1340 /* reget parameters in case they were changed */ 1341 TerminalSaveState(); 1342 setconnmode(0); 1343#else 1344 printf("Suspend is not supported. Try the '!' command instead\n"); 1345#endif 1346 return 1; 1347} 1348 1349static int 1350shell(int argc, char *argv[] __unused) 1351{ 1352 long oldrows, oldcols, newrows, newcols, err_; 1353 1354 setcommandmode(); 1355 1356 err_ = (TerminalWindowSize(&oldrows, &oldcols) == 0) ? 1 : 0; 1357 switch(vfork()) { 1358 case -1: 1359 perror("Fork failed\n"); 1360 break; 1361 1362 case 0: 1363 { 1364 /* 1365 * Fire up the shell in the child. 1366 */ 1367 const char *shellp, *shellname; 1368 1369 shellp = getenv("SHELL"); 1370 if (shellp == NULL) 1371 shellp = "/bin/sh"; 1372 if ((shellname = strrchr(shellp, '/')) == 0) 1373 shellname = shellp; 1374 else 1375 shellname++; 1376 if (argc > 1) 1377 execl(shellp, shellname, "-c", &saveline[1], (char *)0); 1378 else 1379 execl(shellp, shellname, (char *)0); 1380 perror("Execl"); 1381 _exit(1); 1382 } 1383 default: 1384 (void)wait((int *)0); /* Wait for the shell to complete */ 1385 1386 if (TerminalWindowSize(&newrows, &newcols) && connected && 1387 (err_ || ((oldrows != newrows) || (oldcols != newcols)))) { 1388 sendnaws(); 1389 } 1390 break; 1391 } 1392 return 1; 1393} 1394 1395static int 1396bye(int argc, char *argv[]) 1397{ 1398 extern int resettermname; 1399 1400 if (connected) { 1401 (void) shutdown(net, 2); 1402 printf("Connection closed.\n"); 1403 (void) NetClose(net); 1404 connected = 0; 1405 resettermname = 1; 1406#ifdef AUTHENTICATION 1407#ifdef ENCRYPTION 1408 auth_encrypt_connect(connected); 1409#endif 1410#endif 1411 /* reset options */ 1412 tninit(); 1413 } 1414 if ((argc != 2) || (strcmp(argv[1], "fromquit") != 0)) { 1415 longjmp(toplevel, 1); 1416 /* NOTREACHED */ 1417 } 1418 return 1; /* Keep lint, etc., happy */ 1419} 1420 1421void 1422quit(void) 1423{ 1424 (void) call(bye, "bye", "fromquit", 0); 1425 Exit(0); 1426} 1427 1428static int 1429logout(void) 1430{ 1431 send_do(TELOPT_LOGOUT, 1); 1432 (void) netflush(); 1433 return 1; 1434} 1435 1436 1437/* 1438 * The SLC command. 1439 */ 1440 1441struct slclist { 1442 const char *name; 1443 const char *help; 1444 void (*handler)(int); 1445 int arg; 1446}; 1447 1448static void slc_help(void); 1449 1450struct slclist SlcList[] = { 1451 { "export", "Use local special character definitions", 1452 (void (*)(int))slc_mode_export, 0 }, 1453 { "import", "Use remote special character definitions", 1454 slc_mode_import, 1 }, 1455 { "check", "Verify remote special character definitions", 1456 slc_mode_import, 0 }, 1457 { "help", NULL, (void (*)(int))slc_help, 0 }, 1458 { "?", "Print help information", (void (*)(int))slc_help, 0 }, 1459 { NULL, NULL, NULL, 0 }, 1460}; 1461 1462static void 1463slc_help(void) 1464{ 1465 struct slclist *c; 1466 1467 for (c = SlcList; c->name; c++) { 1468 if (c->help) { 1469 if (*c->help) 1470 printf("%-15s %s\n", c->name, c->help); 1471 else 1472 printf("\n"); 1473 } 1474 } 1475} 1476 1477static struct slclist * 1478getslc(char *name) 1479{ 1480 return (struct slclist *) 1481 genget(name, (char **) SlcList, sizeof(struct slclist)); 1482} 1483 1484static int 1485slccmd(int argc, char *argv[]) 1486{ 1487 struct slclist *c; 1488 1489 if (argc != 2) { 1490 fprintf(stderr, 1491 "Need an argument to 'slc' command. 'slc ?' for help.\n"); 1492 return 0; 1493 } 1494 c = getslc(argv[1]); 1495 if (c == 0) { 1496 fprintf(stderr, "'%s': unknown argument ('slc ?' for help).\n", 1497 argv[1]); 1498 return 0; 1499 } 1500 if (Ambiguous((void *)c)) { 1501 fprintf(stderr, "'%s': ambiguous argument ('slc ?' for help).\n", 1502 argv[1]); 1503 return 0; 1504 } 1505 (*c->handler)(c->arg); 1506 slcstate(); 1507 return 1; 1508} 1509 1510/* 1511 * The ENVIRON command. 1512 */ 1513 1514struct envlist { 1515 const char *name; 1516 const char *help; 1517 void (*handler)(unsigned char *, unsigned char *); 1518 int narg; 1519}; 1520 1521extern struct env_lst * 1522 env_define(const unsigned char *, unsigned char *); 1523extern void 1524 env_undefine(unsigned char *), 1525 env_export(const unsigned char *), 1526 env_unexport(const unsigned char *), 1527 env_send(unsigned char *), 1528#if defined(OLD_ENVIRON) && defined(ENV_HACK) 1529 env_varval(unsigned char *), 1530#endif 1531 env_list(void); 1532static void 1533 env_help(void); 1534 1535struct envlist EnvList[] = { 1536 { "define", "Define an environment variable", 1537 (void (*)(unsigned char *, unsigned char *))env_define, 2 }, 1538 { "undefine", "Undefine an environment variable", 1539 (void (*)(unsigned char *, unsigned char *))env_undefine, 1 }, 1540 { "export", "Mark an environment variable for automatic export", 1541 (void (*)(unsigned char *, unsigned char *))env_export, 1 }, 1542 { "unexport", "Don't mark an environment variable for automatic export", 1543 (void (*)(unsigned char *, unsigned char *))env_unexport, 1 }, 1544 { "send", "Send an environment variable", (void (*)(unsigned char *, unsigned char *))env_send, 1 }, 1545 { "list", "List the current environment variables", 1546 (void (*)(unsigned char *, unsigned char *))env_list, 0 }, 1547#if defined(OLD_ENVIRON) && defined(ENV_HACK) 1548 { "varval", "Reverse VAR and VALUE (auto, right, wrong, status)", 1549 (void (*)(unsigned char *, unsigned char *))env_varval, 1 }, 1550#endif 1551 { "help", NULL, (void (*)(unsigned char *, unsigned char *))env_help, 0 }, 1552 { "?", "Print help information", (void (*)(unsigned char *, unsigned char *))env_help, 0 }, 1553 { NULL, NULL, NULL, 0 }, 1554}; 1555 1556static void 1557env_help(void) 1558{ 1559 struct envlist *c; 1560 1561 for (c = EnvList; c->name; c++) { 1562 if (c->help) { 1563 if (*c->help) 1564 printf("%-15s %s\n", c->name, c->help); 1565 else 1566 printf("\n"); 1567 } 1568 } 1569} 1570 1571static struct envlist * 1572getenvcmd(char *name) 1573{ 1574 return (struct envlist *) 1575 genget(name, (char **) EnvList, sizeof(struct envlist)); 1576} 1577 1578static int 1579env_cmd(int argc, char *argv[]) 1580{ 1581 struct envlist *c; 1582 1583 if (argc < 2) { 1584 fprintf(stderr, 1585 "Need an argument to 'environ' command. 'environ ?' for help.\n"); 1586 return 0; 1587 } 1588 c = getenvcmd(argv[1]); 1589 if (c == 0) { 1590 fprintf(stderr, "'%s': unknown argument ('environ ?' for help).\n", 1591 argv[1]); 1592 return 0; 1593 } 1594 if (Ambiguous((void *)c)) { 1595 fprintf(stderr, "'%s': ambiguous argument ('environ ?' for help).\n", 1596 argv[1]); 1597 return 0; 1598 } 1599 if (c->narg + 2 != argc) { 1600 fprintf(stderr, 1601 "Need %s%d argument%s to 'environ %s' command. 'environ ?' for help.\n", 1602 c->narg < argc + 2 ? "only " : "", 1603 c->narg, c->narg == 1 ? "" : "s", c->name); 1604 return 0; 1605 } 1606 (*c->handler)(argv[2], argv[3]); 1607 return 1; 1608} 1609 1610struct env_lst { 1611 struct env_lst *next; /* pointer to next structure */ 1612 struct env_lst *prev; /* pointer to previous structure */ 1613 unsigned char *var; /* pointer to variable name */ 1614 unsigned char *value; /* pointer to variable value */ 1615 int export; /* 1 -> export with default list of variables */ 1616 int welldefined; /* A well defined variable */ 1617}; 1618 1619struct env_lst envlisthead; 1620 1621static struct env_lst * 1622env_find(const unsigned char *var) 1623{ 1624 struct env_lst *ep; 1625 1626 for (ep = envlisthead.next; ep; ep = ep->next) { 1627 if (strcmp(ep->var, var) == 0) 1628 return(ep); 1629 } 1630 return(NULL); 1631} 1632 1633void 1634env_init(void) 1635{ 1636 extern char **environ; 1637 char **epp, *cp; 1638 struct env_lst *ep; 1639 1640 for (epp = environ; *epp; epp++) { 1641 if ((cp = strchr(*epp, '='))) { 1642 *cp = '\0'; 1643 ep = env_define((unsigned char *)*epp, 1644 (unsigned char *)cp+1); 1645 ep->export = 0; 1646 *cp = '='; 1647 } 1648 } 1649 /* 1650 * Special case for DISPLAY variable. If it is ":0.0" or 1651 * "unix:0.0", we have to get rid of "unix" and insert our 1652 * hostname. 1653 */ 1654 if ((ep = env_find("DISPLAY")) 1655 && ((*ep->value == ':') 1656 || (strncmp((char *)ep->value, "unix:", 5) == 0))) { 1657 char hbuf[256+1]; 1658 char *cp2 = strchr((char *)ep->value, ':'); 1659 1660 gethostname(hbuf, 256); 1661 hbuf[256] = '\0'; 1662 cp = (char *)malloc(strlen(hbuf) + strlen(cp2) + 1); 1663 sprintf((char *)cp, "%s%s", hbuf, cp2); 1664 free(ep->value); 1665 ep->value = (unsigned char *)cp; 1666 } 1667 /* 1668 * If USER is not defined, but LOGNAME is, then add 1669 * USER with the value from LOGNAME. By default, we 1670 * don't export the USER variable. 1671 */ 1672 if ((env_find("USER") == NULL) && (ep = env_find("LOGNAME"))) { 1673 env_define("USER", ep->value); 1674 env_unexport("USER"); 1675 } 1676 env_export("DISPLAY"); 1677 env_export("PRINTER"); 1678} 1679 1680struct env_lst * 1681env_define(const unsigned char *var, unsigned char *value) 1682{ 1683 struct env_lst *ep; 1684 1685 if ((ep = env_find(var))) { 1686 if (ep->var) 1687 free(ep->var); 1688 if (ep->value) 1689 free(ep->value); 1690 } else { 1691 ep = (struct env_lst *)malloc(sizeof(struct env_lst)); 1692 ep->next = envlisthead.next; 1693 envlisthead.next = ep; 1694 ep->prev = &envlisthead; 1695 if (ep->next) 1696 ep->next->prev = ep; 1697 } 1698 ep->welldefined = opt_welldefined(var); 1699 ep->export = 1; 1700 ep->var = strdup(var); 1701 ep->value = strdup(value); 1702 return(ep); 1703} 1704 1705void 1706env_undefine(unsigned char *var) 1707{ 1708 struct env_lst *ep; 1709 1710 if ((ep = env_find(var))) { 1711 ep->prev->next = ep->next; 1712 if (ep->next) 1713 ep->next->prev = ep->prev; 1714 if (ep->var) 1715 free(ep->var); 1716 if (ep->value) 1717 free(ep->value); 1718 free(ep); 1719 } 1720} 1721 1722void 1723env_export(const unsigned char *var) 1724{ 1725 struct env_lst *ep; 1726 1727 if ((ep = env_find(var))) 1728 ep->export = 1; 1729} 1730 1731void 1732env_unexport(const unsigned char *var) 1733{ 1734 struct env_lst *ep; 1735 1736 if ((ep = env_find(var))) 1737 ep->export = 0; 1738} 1739 1740void 1741env_send(unsigned char *var) 1742{ 1743 struct env_lst *ep; 1744 1745 if (my_state_is_wont(TELOPT_NEW_ENVIRON) 1746#ifdef OLD_ENVIRON 1747 && my_state_is_wont(TELOPT_OLD_ENVIRON) 1748#endif 1749 ) { 1750 fprintf(stderr, 1751 "Cannot send '%s': Telnet ENVIRON option not enabled\n", 1752 var); 1753 return; 1754 } 1755 ep = env_find(var); 1756 if (ep == 0) { 1757 fprintf(stderr, "Cannot send '%s': variable not defined\n", 1758 var); 1759 return; 1760 } 1761 env_opt_start_info(); 1762 env_opt_add(ep->var); 1763 env_opt_end(0); 1764} 1765 1766void 1767env_list(void) 1768{ 1769 struct env_lst *ep; 1770 1771 for (ep = envlisthead.next; ep; ep = ep->next) { 1772 printf("%c %-20s %s\n", ep->export ? '*' : ' ', 1773 ep->var, ep->value); 1774 } 1775} 1776 1777unsigned char * 1778env_default(int init, int welldefined) 1779{ 1780 static struct env_lst *nep = NULL; 1781 1782 if (init) { 1783 nep = &envlisthead; 1784 return(NULL); 1785 } 1786 if (nep) { 1787 while ((nep = nep->next)) { 1788 if (nep->export && (nep->welldefined == welldefined)) 1789 return(nep->var); 1790 } 1791 } 1792 return(NULL); 1793} 1794 1795unsigned char * 1796env_getvalue(const unsigned char *var) 1797{ 1798 struct env_lst *ep; 1799 1800 if ((ep = env_find(var))) 1801 return(ep->value); 1802 return(NULL); 1803} 1804 1805#if defined(OLD_ENVIRON) && defined(ENV_HACK) 1806void 1807env_varval(unsigned char *what) 1808{ 1809 extern int old_env_var, old_env_value, env_auto; 1810 int len = strlen((char *)what); 1811 1812 if (len == 0) 1813 goto unknown; 1814 1815 if (strncasecmp((char *)what, "status", len) == 0) { 1816 if (env_auto) 1817 printf("%s%s", "VAR and VALUE are/will be ", 1818 "determined automatically\n"); 1819 if (old_env_var == OLD_ENV_VAR) 1820 printf("VAR and VALUE set to correct definitions\n"); 1821 else 1822 printf("VAR and VALUE definitions are reversed\n"); 1823 } else if (strncasecmp((char *)what, "auto", len) == 0) { 1824 env_auto = 1; 1825 old_env_var = OLD_ENV_VALUE; 1826 old_env_value = OLD_ENV_VAR; 1827 } else if (strncasecmp((char *)what, "right", len) == 0) { 1828 env_auto = 0; 1829 old_env_var = OLD_ENV_VAR; 1830 old_env_value = OLD_ENV_VALUE; 1831 } else if (strncasecmp((char *)what, "wrong", len) == 0) { 1832 env_auto = 0; 1833 old_env_var = OLD_ENV_VALUE; 1834 old_env_value = OLD_ENV_VAR; 1835 } else { 1836unknown: 1837 printf("Unknown \"varval\" command. (\"auto\", \"right\", \"wrong\", \"status\")\n"); 1838 } 1839} 1840#endif 1841 1842#ifdef AUTHENTICATION 1843/* 1844 * The AUTHENTICATE command. 1845 */ 1846 1847struct authlist { 1848 const char *name; 1849 const char *help; 1850 int (*handler)(char *); 1851 int narg; 1852}; 1853 1854extern int 1855 auth_enable(char *), 1856 auth_disable(char *), 1857 auth_status(void); 1858static int 1859 auth_help(void); 1860 1861struct authlist AuthList[] = { 1862 { "status", "Display current status of authentication information", 1863 (int (*)(char *))auth_status, 0 }, 1864 { "disable", "Disable an authentication type ('auth disable ?' for more)", 1865 auth_disable, 1 }, 1866 { "enable", "Enable an authentication type ('auth enable ?' for more)", 1867 auth_enable, 1 }, 1868 { "help", NULL, (int (*)(char *))auth_help, 0 }, 1869 { "?", "Print help information", (int (*)(char *))auth_help, 0 }, 1870 { NULL, NULL, NULL, 0 }, 1871}; 1872 1873static int 1874auth_help(void) 1875{ 1876 struct authlist *c; 1877 1878 for (c = AuthList; c->name; c++) { 1879 if (c->help) { 1880 if (*c->help) 1881 printf("%-15s %s\n", c->name, c->help); 1882 else 1883 printf("\n"); 1884 } 1885 } 1886 return 0; 1887} 1888 1889int 1890auth_cmd(int argc, char *argv[]) 1891{ 1892 struct authlist *c; 1893 1894 if (argc < 2) { 1895 fprintf(stderr, 1896 "Need an argument to 'auth' command. 'auth ?' for help.\n"); 1897 return 0; 1898 } 1899 1900 c = (struct authlist *) 1901 genget(argv[1], (char **) AuthList, sizeof(struct authlist)); 1902 if (c == 0) { 1903 fprintf(stderr, "'%s': unknown argument ('auth ?' for help).\n", 1904 argv[1]); 1905 return 0; 1906 } 1907 if (Ambiguous((void *)c)) { 1908 fprintf(stderr, "'%s': ambiguous argument ('auth ?' for help).\n", 1909 argv[1]); 1910 return 0; 1911 } 1912 if (c->narg + 2 != argc) { 1913 fprintf(stderr, 1914 "Need %s%d argument%s to 'auth %s' command. 'auth ?' for help.\n", 1915 c->narg < argc + 2 ? "only " : "", 1916 c->narg, c->narg == 1 ? "" : "s", c->name); 1917 return 0; 1918 } 1919 return((*c->handler)(argv[2])); 1920} 1921#endif 1922 1923#ifdef ENCRYPTION 1924/* 1925 * The ENCRYPT command. 1926 */ 1927 1928struct encryptlist { 1929 const char *name; 1930 const char *help; 1931 int (*handler)(char *, char *); 1932 int needconnect; 1933 int minarg; 1934 int maxarg; 1935}; 1936 1937extern int 1938 EncryptEnable(char *, char *), 1939 EncryptDisable(char *, char *), 1940 EncryptType(char *, char *), 1941 EncryptStart(char *), 1942 EncryptStartInput(void), 1943 EncryptStartOutput(void), 1944 EncryptStop(char *), 1945 EncryptStopInput(void), 1946 EncryptStopOutput(void), 1947 EncryptStatus(void); 1948static int 1949 EncryptHelp(void); 1950 1951struct encryptlist EncryptList[] = { 1952 { "enable", "Enable encryption. ('encrypt enable ?' for more)", 1953 EncryptEnable, 1, 1, 2 }, 1954 { "disable", "Disable encryption. ('encrypt enable ?' for more)", 1955 EncryptDisable, 0, 1, 2 }, 1956 { "type", "Set encryption type. ('encrypt type ?' for more)", 1957 EncryptType, 0, 1, 1 }, 1958 { "start", "Start encryption. ('encrypt start ?' for more)", 1959 (int (*)(char *, char *))EncryptStart, 1, 0, 1 }, 1960 { "stop", "Stop encryption. ('encrypt stop ?' for more)", 1961 (int (*)(char *, char *))EncryptStop, 1, 0, 1 }, 1962 { "input", "Start encrypting the input stream", 1963 (int (*)(char *, char *))EncryptStartInput, 1, 0, 0 }, 1964 { "-input", "Stop encrypting the input stream", 1965 (int (*)(char *, char *))EncryptStopInput, 1, 0, 0 }, 1966 { "output", "Start encrypting the output stream", 1967 (int (*)(char *, char *))EncryptStartOutput, 1, 0, 0 }, 1968 { "-output", "Stop encrypting the output stream", 1969 (int (*)(char *, char *))EncryptStopOutput, 1, 0, 0 }, 1970 1971 { "status", "Display current status of authentication information", 1972 (int (*)(char *, char *))EncryptStatus, 0, 0, 0 }, 1973 { "help", NULL, (int (*)(char *, char *))EncryptHelp, 0, 0, 0 }, 1974 { "?", "Print help information", (int (*)(char *, char *))EncryptHelp, 0, 0, 0 }, 1975 { NULL, NULL, NULL, 0, 0, 0 }, 1976}; 1977 1978static int 1979EncryptHelp(void) 1980{ 1981 struct encryptlist *c; 1982 1983 for (c = EncryptList; c->name; c++) { 1984 if (c->help) { 1985 if (*c->help) 1986 printf("%-15s %s\n", c->name, c->help); 1987 else 1988 printf("\n"); 1989 } 1990 } 1991 return 0; 1992} 1993 1994static int 1995encrypt_cmd(int argc, char *argv[]) 1996{ 1997 struct encryptlist *c; 1998 1999 if (argc < 2) { 2000 fprintf(stderr, 2001 "Need an argument to 'encrypt' command. 'encrypt ?' for help.\n"); 2002 return 0; 2003 } 2004 2005 c = (struct encryptlist *) 2006 genget(argv[1], (char **) EncryptList, sizeof(struct encryptlist)); 2007 if (c == 0) { 2008 fprintf(stderr, "'%s': unknown argument ('encrypt ?' for help).\n", 2009 argv[1]); 2010 return 0; 2011 } 2012 if (Ambiguous((void *)c)) { 2013 fprintf(stderr, "'%s': ambiguous argument ('encrypt ?' for help).\n", 2014 argv[1]); 2015 return 0; 2016 } 2017 argc -= 2; 2018 if (argc < c->minarg || argc > c->maxarg) { 2019 if (c->minarg == c->maxarg) { 2020 fprintf(stderr, "Need %s%d argument%s ", 2021 c->minarg < argc ? "only " : "", c->minarg, 2022 c->minarg == 1 ? "" : "s"); 2023 } else { 2024 fprintf(stderr, "Need %s%d-%d arguments ", 2025 c->maxarg < argc ? "only " : "", c->minarg, c->maxarg); 2026 } 2027 fprintf(stderr, "to 'encrypt %s' command. 'encrypt ?' for help.\n", 2028 c->name); 2029 return 0; 2030 } 2031 if (c->needconnect && !connected) { 2032 if (!(argc && (isprefix(argv[2], "help") || isprefix(argv[2], "?")))) { 2033 printf("?Need to be connected first.\n"); 2034 return 0; 2035 } 2036 } 2037 return ((*c->handler)(argc > 0 ? argv[2] : 0, 2038 argc > 1 ? argv[3] : 0)); 2039} 2040#endif /* ENCRYPTION */ 2041 2042/* 2043 * Print status about the connection. 2044 */ 2045/*ARGSUSED*/ 2046static int 2047status(int argc, char *argv[]) 2048{ 2049 if (connected) { 2050 printf("Connected to %s.\n", hostname); 2051 if ((argc < 2) || strcmp(argv[1], "notmuch")) { 2052 int mode = getconnmode(); 2053 2054 if (my_want_state_is_will(TELOPT_LINEMODE)) { 2055 printf("Operating with LINEMODE option\n"); 2056 printf("%s line editing\n", (mode&MODE_EDIT) ? "Local" : "No"); 2057 printf("%s catching of signals\n", 2058 (mode&MODE_TRAPSIG) ? "Local" : "No"); 2059 slcstate(); 2060#ifdef KLUDGELINEMODE 2061 } else if (kludgelinemode && my_want_state_is_dont(TELOPT_SGA)) { 2062 printf("Operating in obsolete linemode\n"); 2063#endif 2064 } else { 2065 printf("Operating in single character mode\n"); 2066 if (localchars) 2067 printf("Catching signals locally\n"); 2068 } 2069 printf("%s character echo\n", (mode&MODE_ECHO) ? "Local" : "Remote"); 2070 if (my_want_state_is_will(TELOPT_LFLOW)) 2071 printf("%s flow control\n", (mode&MODE_FLOW) ? "Local" : "No"); 2072#ifdef ENCRYPTION 2073 encrypt_display(); 2074#endif /* ENCRYPTION */ 2075 } 2076 } else { 2077 printf("No connection.\n"); 2078 } 2079 printf("Escape character is '%s'.\n", control(escape)); 2080 (void) fflush(stdout); 2081 return 1; 2082} 2083 2084#ifdef SIGINFO 2085/* 2086 * Function that gets called when SIGINFO is received. 2087 */ 2088void 2089ayt_status(void) 2090{ 2091 (void) call(status, "status", "notmuch", 0); 2092} 2093#endif 2094 2095static const char * 2096sockaddr_ntop(struct sockaddr *sa) 2097{ 2098 void *addr; 2099#ifndef INET6_ADDRSTRLEN 2100# define INET6_ADDRSTRLEN 256 2101#endif 2102 static char addrbuf[INET6_ADDRSTRLEN]; 2103 2104 switch (sa->sa_family) { 2105 case AF_INET: 2106 addr = &((struct sockaddr_in *)sa)->sin_addr; 2107 break; 2108 case AF_UNIX: 2109 addr = &((struct sockaddr_un *)sa)->sun_path; 2110 break; 2111#ifdef INET6 2112 case AF_INET6: 2113 addr = &((struct sockaddr_in6 *)sa)->sin6_addr; 2114 break; 2115#endif 2116 default: 2117 return NULL; 2118 } 2119 inet_ntop(sa->sa_family, addr, addrbuf, sizeof(addrbuf)); 2120 return addrbuf; 2121} 2122 2123#if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC) 2124static int 2125setpolicy(int lnet, struct addrinfo *res, char *policy) 2126{ 2127 char *buf; 2128 int level; 2129 int optname; 2130 2131 if (policy == NULL) 2132 return 0; 2133 2134 buf = ipsec_set_policy(policy, strlen(policy)); 2135 if (buf == NULL) { 2136 printf("%s\n", ipsec_strerror()); 2137 return -1; 2138 } 2139 level = res->ai_family == AF_INET ? IPPROTO_IP : IPPROTO_IPV6; 2140 optname = res->ai_family == AF_INET ? IP_IPSEC_POLICY : IPV6_IPSEC_POLICY; 2141 if (setsockopt(lnet, level, optname, buf, ipsec_get_policylen(buf)) < 0){ 2142 perror("setsockopt"); 2143 return -1; 2144 } 2145 2146 free(buf); 2147 return 0; 2148} 2149#endif 2150 2151#ifdef INET6 2152/* 2153 * When an Address Family related error happend, check if retry with 2154 * another AF is possible or not. 2155 * Return 1, if retry with another af is OK. Else, return 0. 2156 */ 2157static int 2158switch_af(struct addrinfo **aip) 2159{ 2160 int nextaf; 2161 struct addrinfo *ai; 2162 2163 ai = *aip; 2164 nextaf = (ai->ai_family == AF_INET) ? AF_INET6 : AF_INET; 2165 do 2166 ai=ai->ai_next; 2167 while (ai != NULL && ai->ai_family != nextaf); 2168 *aip = ai; 2169 if (*aip != NULL) { 2170 return 1; 2171 } 2172 return 0; 2173} 2174#endif 2175 2176int 2177tn(int argc, char *argv[]) 2178{ 2179 char *srp = 0; 2180 int proto, opt; 2181 int srlen; 2182 int srcroute = 0, result; 2183 char *cmd, *hostp = 0, *portp = 0, *user = 0; 2184 char *src_addr = NULL; 2185 struct addrinfo hints, *res, *res0 = NULL, *src_res, *src_res0 = NULL; 2186 int error = 0, af_error = 0; 2187 2188 if (connected) { 2189 printf("?Already connected to %s\n", hostname); 2190 setuid(getuid()); 2191 return 0; 2192 } 2193 if (argc < 2) { 2194 (void) strcpy(line, "open "); 2195 printf("(to) "); 2196 (void) fgets(&line[strlen(line)], sizeof(line) - strlen(line), stdin); 2197 makeargv(); 2198 argc = margc; 2199 argv = margv; 2200 } 2201 cmd = *argv; 2202 --argc; ++argv; 2203 while (argc) { 2204 if (strcmp(*argv, "help") == 0 || isprefix(*argv, "?")) 2205 goto usage; 2206 if (strcmp(*argv, "-l") == 0) { 2207 --argc; ++argv; 2208 if (argc == 0) 2209 goto usage; 2210 user = *argv++; 2211 --argc; 2212 continue; 2213 } 2214 if (strcmp(*argv, "-a") == 0) { 2215 --argc; ++argv; 2216 autologin = 1; 2217 continue; 2218 } 2219 if (strcmp(*argv, "-s") == 0) { 2220 --argc; ++argv; 2221 if (argc == 0) 2222 goto usage; 2223 src_addr = *argv++; 2224 --argc; 2225 continue; 2226 } 2227 if (hostp == 0) { 2228 hostp = *argv++; 2229 --argc; 2230 continue; 2231 } 2232 if (portp == 0) { 2233 portp = *argv++; 2234 --argc; 2235 continue; 2236 } 2237 usage: 2238 printf("usage: %s [-l user] [-a] [-s src_addr] host-name [port]\n", cmd); 2239 setuid(getuid()); 2240 return 0; 2241 } 2242 if (hostp == 0) 2243 goto usage; 2244 2245 if (src_addr != NULL) { 2246 memset(&hints, 0, sizeof(hints)); 2247 hints.ai_family = family; 2248 hints.ai_socktype = SOCK_STREAM; 2249 error = getaddrinfo(src_addr, 0, &hints, &src_res); 2250 if (error == EAI_NONAME) { 2251 hints.ai_flags = 0; 2252 error = getaddrinfo(src_addr, 0, &hints, &src_res); 2253 } 2254 if (error != 0) { 2255 fprintf(stderr, "%s: %s\n", src_addr, gai_strerror(error)); 2256 if (error == EAI_SYSTEM) 2257 fprintf(stderr, "%s: %s\n", src_addr, strerror(errno)); 2258 setuid(getuid()); 2259 return 0; 2260 } 2261 src_res0 = src_res; 2262 } 2263 if (hostp[0] == '/') { 2264 struct sockaddr_un su; 2265 2266 if (strlen(hostp) >= sizeof(su.sun_path)) { 2267 fprintf(stderr, "hostname too long for unix domain socket: %s", 2268 hostp); 2269 goto fail; 2270 } 2271 hostname = hostp; 2272 memset(&su, 0, sizeof su); 2273 su.sun_family = AF_UNIX; 2274 strlcpy(su.sun_path, hostp, sizeof su.sun_path); 2275 printf("Trying %s...\n", hostp); 2276 net = socket(AF_UNIX, SOCK_STREAM, 0); 2277 if ( net < 0) { 2278 perror("socket"); 2279 goto fail; 2280 } 2281 if (connect(net, (struct sockaddr *)&su, sizeof su) == -1) { 2282 perror(su.sun_path); 2283 (void) NetClose(net); 2284 goto fail; 2285 } 2286 goto af_unix; 2287 } else if (hostp[0] == '@' || hostp[0] == '!') { 2288 if ( 2289#ifdef INET6 2290 family == AF_INET6 || 2291#endif 2292 (hostname = strrchr(hostp, ':')) == NULL) 2293 hostname = strrchr(hostp, '@'); 2294 if (hostname == NULL) { 2295 hostname = hostp; 2296 } else { 2297 hostname++; 2298 srcroute = 1; 2299 } 2300 } else 2301 hostname = hostp; 2302 if (!portp) { 2303 telnetport = 1; 2304 portp = strdup("telnet"); 2305 } else if (*portp == '-') { 2306 portp++; 2307 telnetport = 1; 2308 } else if (*portp == '+') { 2309 portp++; 2310 telnetport = -1; 2311 } else 2312 telnetport = 0; 2313 2314 memset(&hints, 0, sizeof(hints)); 2315 hints.ai_flags = AI_NUMERICHOST; 2316 hints.ai_family = family; 2317 hints.ai_socktype = SOCK_STREAM; 2318 error = getaddrinfo(hostname, portp, &hints, &res); 2319 if (error) { 2320 hints.ai_flags = AI_CANONNAME; 2321 error = getaddrinfo(hostname, portp, &hints, &res); 2322 } 2323 if (error != 0) { 2324 fprintf(stderr, "%s: %s\n", hostname, gai_strerror(error)); 2325 if (error == EAI_SYSTEM) 2326 fprintf(stderr, "%s: %s\n", hostname, strerror(errno)); 2327 setuid(getuid()); 2328 goto fail; 2329 } 2330 if (hints.ai_flags == AI_NUMERICHOST) { 2331 /* hostname has numeric */ 2332 int gni_err = 1; 2333 2334 if (doaddrlookup) 2335 gni_err = getnameinfo(res->ai_addr, res->ai_addr->sa_len, 2336 _hostname, sizeof(_hostname) - 1, NULL, 0, 2337 NI_NAMEREQD); 2338 if (gni_err != 0) 2339 (void) strncpy(_hostname, hostp, sizeof(_hostname) - 1); 2340 _hostname[sizeof(_hostname)-1] = '\0'; 2341 hostname = _hostname; 2342 } else { 2343 /* hostname has FQDN */ 2344 if (srcroute != 0) 2345 (void) strncpy(_hostname, hostname, sizeof(_hostname) - 1); 2346 else if (res->ai_canonname != NULL) 2347 strcpy(_hostname, res->ai_canonname); 2348 else 2349 (void) strncpy(_hostname, hostp, sizeof(_hostname) - 1); 2350 _hostname[sizeof(_hostname)-1] = '\0'; 2351 hostname = _hostname; 2352 } 2353 res0 = res; 2354 #ifdef INET6 2355 af_again: 2356 #endif 2357 if (srcroute != 0) { 2358 static char hostbuf[BUFSIZ]; 2359 2360 if (af_error == 0) { /* save intermediate hostnames for retry */ 2361 strncpy(hostbuf, hostp, BUFSIZ - 1); 2362 hostbuf[BUFSIZ - 1] = '\0'; 2363 } else 2364 hostp = hostbuf; 2365 srp = 0; 2366 result = sourceroute(res, hostp, &srp, &srlen, &proto, &opt); 2367 if (result == 0) { 2368#ifdef INET6 2369 if (family == AF_UNSPEC && af_error == 0 && 2370 switch_af(&res) == 1) { 2371 af_error = 1; 2372 goto af_again; 2373 } 2374#endif 2375 setuid(getuid()); 2376 goto fail; 2377 } else if (result == -1) { 2378 printf("Bad source route option: %s\n", hostp); 2379 setuid(getuid()); 2380 goto fail; 2381 } 2382 } 2383 do { 2384 printf("Trying %s...\n", sockaddr_ntop(res->ai_addr)); 2385 net = socket(res->ai_family, res->ai_socktype, res->ai_protocol); 2386 setuid(getuid()); 2387 if (net < 0) { 2388#ifdef INET6 2389 if (family == AF_UNSPEC && af_error == 0 && 2390 switch_af(&res) == 1) { 2391 af_error = 1; 2392 goto af_again; 2393 } 2394#endif 2395 perror("telnet: socket"); 2396 goto fail; 2397 } 2398 if (srp && setsockopt(net, proto, opt, (char *)srp, srlen) < 0) 2399 perror("setsockopt (source route)"); 2400#if defined(IPPROTO_IP) && defined(IP_TOS) 2401 if (res->ai_family == PF_INET) { 2402# if defined(HAS_GETTOS) 2403 struct tosent *tp; 2404 if (tos < 0 && (tp = gettosbyname("telnet", "tcp"))) 2405 tos = tp->t_tos; 2406# endif 2407 if (tos < 0) 2408 tos = IPTOS_LOWDELAY; 2409 if (tos 2410 && (setsockopt(net, IPPROTO_IP, IP_TOS, 2411 (char *)&tos, sizeof(int)) < 0) 2412 && (errno != ENOPROTOOPT)) 2413 perror("telnet: setsockopt (IP_TOS) (ignored)"); 2414 } 2415#endif /* defined(IPPROTO_IP) && defined(IP_TOS) */ 2416 2417 if (telnet_debug && SetSockOpt(net, SOL_SOCKET, SO_DEBUG, 1) < 0) { 2418 perror("setsockopt (SO_DEBUG)"); 2419 } 2420 2421 if (src_addr != NULL) { 2422 for (src_res = src_res0; src_res != 0; src_res = src_res->ai_next) 2423 if (src_res->ai_family == res->ai_family) 2424 break; 2425 if (src_res == NULL) 2426 src_res = src_res0; 2427 if (bind(net, src_res->ai_addr, src_res->ai_addrlen) == -1) { 2428#ifdef INET6 2429 if (family == AF_UNSPEC && af_error == 0 && 2430 switch_af(&res) == 1) { 2431 af_error = 1; 2432 (void) NetClose(net); 2433 goto af_again; 2434 } 2435#endif 2436 perror("bind"); 2437 (void) NetClose(net); 2438 goto fail; 2439 } 2440 } 2441#if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC) 2442 if (setpolicy(net, res, ipsec_policy_in) < 0) { 2443 (void) NetClose(net); 2444 goto fail; 2445 } 2446 if (setpolicy(net, res, ipsec_policy_out) < 0) { 2447 (void) NetClose(net); 2448 goto fail; 2449 } 2450#endif 2451 2452 if (connect(net, res->ai_addr, res->ai_addrlen) < 0) { 2453 struct addrinfo *next; 2454 2455 next = res->ai_next; 2456 /* If already an af failed, only try same af. */ 2457 if (af_error != 0) 2458 while (next != NULL && next->ai_family != res->ai_family) 2459 next = next->ai_next; 2460 warn("connect to address %s", sockaddr_ntop(res->ai_addr)); 2461 if (next != NULL) { 2462 res = next; 2463 (void) NetClose(net); 2464 continue; 2465 } 2466 warnx("Unable to connect to remote host"); 2467 (void) NetClose(net); 2468 goto fail; 2469 } 2470 connected++; 2471#ifdef AUTHENTICATION 2472#ifdef ENCRYPTION 2473 auth_encrypt_connect(connected); 2474#endif 2475#endif 2476 } while (connected == 0); 2477 freeaddrinfo(res0); 2478 if (src_res0 != NULL) 2479 freeaddrinfo(src_res0); 2480 cmdrc(hostp, hostname); 2481 af_unix: 2482 connected = 1; 2483 if (autologin && user == NULL) { 2484 struct passwd *pw; 2485 2486 user = getenv("USER"); 2487 if (user == NULL || 2488 ((pw = getpwnam(user)) && pw->pw_uid != getuid())) { 2489 if ((pw = getpwuid(getuid()))) 2490 user = pw->pw_name; 2491 else 2492 user = NULL; 2493 } 2494 } 2495 if (user) { 2496 env_define("USER", user); 2497 env_export("USER"); 2498 } 2499 (void) call(status, "status", "notmuch", 0); 2500 if (setjmp(peerdied) == 0) 2501 telnet(user); 2502 (void) NetClose(net); 2503 ExitString("Connection closed by foreign host.\n",1); 2504 /*NOTREACHED*/ 2505 fail: 2506 if (res0 != NULL) 2507 freeaddrinfo(res0); 2508 if (src_res0 != NULL) 2509 freeaddrinfo(src_res0); 2510 return 0; 2511} 2512 2513#define HELPINDENT (sizeof ("connect")) 2514 2515static char 2516 openhelp[] = "connect to a site", 2517 closehelp[] = "close current connection", 2518 logouthelp[] = "forcibly logout remote user and close the connection", 2519 quithelp[] = "exit telnet", 2520 statushelp[] = "print status information", 2521 helphelp[] = "print help information", 2522 sendhelp[] = "transmit special characters ('send ?' for more)", 2523 sethelp[] = "set operating parameters ('set ?' for more)", 2524 unsethelp[] = "unset operating parameters ('unset ?' for more)", 2525 togglestring[] ="toggle operating parameters ('toggle ?' for more)", 2526 slchelp[] = "change state of special charaters ('slc ?' for more)", 2527 displayhelp[] = "display operating parameters", 2528#ifdef AUTHENTICATION 2529 authhelp[] = "turn on (off) authentication ('auth ?' for more)", 2530#endif 2531#ifdef ENCRYPTION 2532 encrypthelp[] = "turn on (off) encryption ('encrypt ?' for more)", 2533#endif /* ENCRYPTION */ 2534 zhelp[] = "suspend telnet", 2535#ifdef OPIE 2536 opiehelp[] = "compute response to OPIE challenge", 2537#endif 2538 shellhelp[] = "invoke a subshell", 2539 envhelp[] = "change environment variables ('environ ?' for more)", 2540 modestring[] = "try to enter line or character mode ('mode ?' for more)"; 2541 2542static Command cmdtab[] = { 2543 { "close", closehelp, bye, 1 }, 2544 { "logout", logouthelp, (int (*)(int, char **))logout, 1 }, 2545 { "display", displayhelp, display, 0 }, 2546 { "mode", modestring, modecmd, 0 }, 2547 { "telnet", openhelp, tn, 0 }, 2548 { "open", openhelp, tn, 0 }, 2549 { "quit", quithelp, (int (*)(int, char **))quit, 0 }, 2550 { "send", sendhelp, sendcmd, 0 }, 2551 { "set", sethelp, setcmd, 0 }, 2552 { "unset", unsethelp, unsetcmd, 0 }, 2553 { "status", statushelp, status, 0 }, 2554 { "toggle", togglestring, toggle, 0 }, 2555 { "slc", slchelp, slccmd, 0 }, 2556#ifdef AUTHENTICATION 2557 { "auth", authhelp, auth_cmd, 0 }, 2558#endif 2559#ifdef ENCRYPTION 2560 { "encrypt", encrypthelp, encrypt_cmd, 0 }, 2561#endif /* ENCRYPTION */ 2562 { "z", zhelp, (int (*)(int, char **))suspend, 0 }, 2563 { "!", shellhelp, shell, 1 }, 2564 { "environ", envhelp, env_cmd, 0 }, 2565 { "?", helphelp, help, 0 }, 2566#ifdef OPIE 2567 { "opie", opiehelp, opie_calc, 0 }, 2568#endif 2569 { NULL, NULL, NULL, 0 } 2570}; 2571 2572static char crmodhelp[] = "deprecated command -- use 'toggle crmod' instead"; 2573static char escapehelp[] = "deprecated command -- use 'set escape' instead"; 2574 2575static Command cmdtab2[] = { 2576 { "help", 0, help, 0 }, 2577 { "escape", escapehelp, setescape, 0 }, 2578 { "crmod", crmodhelp, (int (*)(int, char **))togcrmod, 0 }, 2579 { NULL, NULL, NULL, 0 } 2580}; 2581 2582 2583/* 2584 * Call routine with argc, argv set from args (terminated by 0). 2585 */ 2586 2587static int 2588call(intrtn_t routine, ...) 2589{ 2590 va_list ap; 2591 char *args[100]; 2592 int argno = 0; 2593 2594 va_start(ap, routine); 2595 while ((args[argno++] = va_arg(ap, char *)) != 0); 2596 va_end(ap); 2597 return (*routine)(argno-1, args); 2598} 2599 2600 2601static Command * 2602getcmd(char *name) 2603{ 2604 Command *cm; 2605 2606 if ((cm = (Command *) genget(name, (char **) cmdtab, sizeof(Command)))) 2607 return cm; 2608 return (Command *) genget(name, (char **) cmdtab2, sizeof(Command)); 2609} 2610 2611void 2612command(int top, const char *tbuf, int cnt) 2613{ 2614 Command *c; 2615 2616 setcommandmode(); 2617 if (!top) { 2618 putchar('\n'); 2619 } else { 2620 (void) signal(SIGINT, SIG_DFL); 2621 (void) signal(SIGQUIT, SIG_DFL); 2622 } 2623 for (;;) { 2624 if (rlogin == _POSIX_VDISABLE) 2625 printf("%s> ", prompt); 2626 if (tbuf) { 2627 char *cp; 2628 cp = line; 2629 while (cnt > 0 && (*cp++ = *tbuf++) != '\n') 2630 cnt--; 2631 tbuf = 0; 2632 if (cp == line || *--cp != '\n' || cp == line) 2633 goto getline; 2634 *cp = '\0'; 2635 if (rlogin == _POSIX_VDISABLE) 2636 printf("%s\n", line); 2637 } else { 2638 getline: 2639 if (rlogin != _POSIX_VDISABLE) 2640 printf("%s> ", prompt); 2641 if (fgets(line, sizeof(line), stdin) == NULL) { 2642 if (feof(stdin) || ferror(stdin)) { 2643 (void) quit(); 2644 /*NOTREACHED*/ 2645 } 2646 break; 2647 } 2648 } 2649 if (line[0] == 0) 2650 break; 2651 makeargv(); 2652 if (margv[0] == 0) { 2653 break; 2654 } 2655 c = getcmd(margv[0]); 2656 if (Ambiguous((void *)c)) { 2657 printf("?Ambiguous command\n"); 2658 continue; 2659 } 2660 if (c == 0) { 2661 printf("?Invalid command\n"); 2662 continue; 2663 } 2664 if (c->needconnect && !connected) { 2665 printf("?Need to be connected first.\n"); 2666 continue; 2667 } 2668 if ((*c->handler)(margc, margv)) { 2669 break; 2670 } 2671 } 2672 if (!top) { 2673 if (!connected) { 2674 longjmp(toplevel, 1); 2675 /*NOTREACHED*/ 2676 } 2677 setconnmode(0); 2678 } 2679} 2680 2681/* 2682 * Help command. 2683 */ 2684static int 2685help(int argc, char *argv[]) 2686{ 2687 Command *c; 2688 2689 if (argc == 1) { 2690 printf("Commands may be abbreviated. Commands are:\n\n"); 2691 for (c = cmdtab; c->name; c++) 2692 if (c->help) { 2693 printf("%-*s\t%s\n", (int)HELPINDENT, c->name, 2694 c->help); 2695 } 2696 return 0; 2697 } 2698 else while (--argc > 0) { 2699 char *arg; 2700 arg = *++argv; 2701 c = getcmd(arg); 2702 if (Ambiguous((void *)c)) 2703 printf("?Ambiguous help command %s\n", arg); 2704 else if (c == (Command *)0) 2705 printf("?Invalid help command %s\n", arg); 2706 else 2707 printf("%s\n", c->help); 2708 } 2709 return 0; 2710} 2711 2712static char *rcname = 0; 2713static char rcbuf[128]; 2714 2715void 2716cmdrc(char *m1, char *m2) 2717{ 2718 Command *c; 2719 FILE *rcfile; 2720 int gotmachine = 0; 2721 int l1 = strlen(m1); 2722 int l2 = strlen(m2); 2723 char m1save[MAXHOSTNAMELEN]; 2724 2725 if (skiprc) 2726 return; 2727 2728 strlcpy(m1save, m1, sizeof(m1save)); 2729 m1 = m1save; 2730 2731 if (rcname == 0) { 2732 rcname = getenv("HOME"); 2733 if (rcname && (strlen(rcname) + 10) < sizeof(rcbuf)) 2734 strcpy(rcbuf, rcname); 2735 else 2736 rcbuf[0] = '\0'; 2737 strcat(rcbuf, "/.telnetrc"); 2738 rcname = rcbuf; 2739 } 2740 2741 if ((rcfile = fopen(rcname, "r")) == 0) { 2742 return; 2743 } 2744 2745 for (;;) { 2746 if (fgets(line, sizeof(line), rcfile) == NULL) 2747 break; 2748 if (line[0] == 0) 2749 break; 2750 if (line[0] == '#') 2751 continue; 2752 if (gotmachine) { 2753 if (!isspace(line[0])) 2754 gotmachine = 0; 2755 } 2756 if (gotmachine == 0) { 2757 if (isspace(line[0])) 2758 continue; 2759 if (strncasecmp(line, m1, l1) == 0) 2760 strncpy(line, &line[l1], sizeof(line) - l1); 2761 else if (strncasecmp(line, m2, l2) == 0) 2762 strncpy(line, &line[l2], sizeof(line) - l2); 2763 else if (strncasecmp(line, "DEFAULT", 7) == 0) 2764 strncpy(line, &line[7], sizeof(line) - 7); 2765 else 2766 continue; 2767 if (line[0] != ' ' && line[0] != '\t' && line[0] != '\n') 2768 continue; 2769 gotmachine = 1; 2770 } 2771 makeargv(); 2772 if (margv[0] == 0) 2773 continue; 2774 c = getcmd(margv[0]); 2775 if (Ambiguous((void *)c)) { 2776 printf("?Ambiguous command: %s\n", margv[0]); 2777 continue; 2778 } 2779 if (c == 0) { 2780 printf("?Invalid command: %s\n", margv[0]); 2781 continue; 2782 } 2783 /* 2784 * This should never happen... 2785 */ 2786 if (c->needconnect && !connected) { 2787 printf("?Need to be connected first for %s.\n", margv[0]); 2788 continue; 2789 } 2790 (*c->handler)(margc, margv); 2791 } 2792 fclose(rcfile); 2793} 2794 2795/* 2796 * Source route is handed in as 2797 * [!]@hop1@hop2...[@|:]dst 2798 * If the leading ! is present, it is a 2799 * strict source route, otherwise it is 2800 * assmed to be a loose source route. 2801 * 2802 * We fill in the source route option as 2803 * hop1,hop2,hop3...dest 2804 * and return a pointer to hop1, which will 2805 * be the address to connect() to. 2806 * 2807 * Arguments: 2808 * 2809 * res: ponter to addrinfo structure which contains sockaddr to 2810 * the host to connect to. 2811 * 2812 * arg: pointer to route list to decipher 2813 * 2814 * cpp: If *cpp is not equal to NULL, this is a 2815 * pointer to a pointer to a character array 2816 * that should be filled in with the option. 2817 * 2818 * lenp: pointer to an integer that contains the 2819 * length of *cpp if *cpp != NULL. 2820 * 2821 * protop: pointer to an integer that should be filled in with 2822 * appropriate protocol for setsockopt, as socket 2823 * protocol family. 2824 * 2825 * optp: pointer to an integer that should be filled in with 2826 * appropriate option for setsockopt, as socket protocol 2827 * family. 2828 * 2829 * Return values: 2830 * 2831 * If the return value is 1, then all operations are 2832 * successful. If the 2833 * return value is -1, there was a syntax error in the 2834 * option, either unknown characters, or too many hosts. 2835 * If the return value is 0, one of the hostnames in the 2836 * path is unknown, and *cpp is set to point to the bad 2837 * hostname. 2838 * 2839 * *cpp: If *cpp was equal to NULL, it will be filled 2840 * in with a pointer to our static area that has 2841 * the option filled in. This will be 32bit aligned. 2842 * 2843 * *lenp: This will be filled in with how long the option 2844 * pointed to by *cpp is. 2845 * 2846 * *protop: This will be filled in with appropriate protocol for 2847 * setsockopt, as socket protocol family. 2848 * 2849 * *optp: This will be filled in with appropriate option for 2850 * setsockopt, as socket protocol family. 2851 */ 2852static int 2853sourceroute(struct addrinfo *ai, char *arg, char **cpp, int *lenp, int *protop, int *optp) 2854{ 2855 static char buf[1024 + ALIGNBYTES]; /*XXX*/ 2856 char *cp, *cp2, *lsrp, *ep; 2857 struct sockaddr_in *_sin; 2858#ifdef INET6 2859 struct sockaddr_in6 *sin6; 2860 struct ip6_rthdr *rth; 2861#endif 2862 struct addrinfo hints, *res; 2863 int error; 2864 char c; 2865 2866 /* 2867 * Verify the arguments, and make sure we have 2868 * at least 7 bytes for the option. 2869 */ 2870 if (cpp == NULL || lenp == NULL) 2871 return -1; 2872 if (*cpp != NULL) { 2873 switch (res->ai_family) { 2874 case AF_INET: 2875 if (*lenp < 7) 2876 return -1; 2877 break; 2878#ifdef INET6 2879 case AF_INET6: 2880 if (*lenp < (int)CMSG_SPACE(sizeof(struct ip6_rthdr) + 2881 sizeof(struct in6_addr))) 2882 return -1; 2883 break; 2884#endif 2885 } 2886 } 2887 /* 2888 * Decide whether we have a buffer passed to us, 2889 * or if we need to use our own static buffer. 2890 */ 2891 if (*cpp) { 2892 lsrp = *cpp; 2893 ep = lsrp + *lenp; 2894 } else { 2895 *cpp = lsrp = (char *)ALIGN(buf); 2896 ep = lsrp + 1024; 2897 } 2898 2899 cp = arg; 2900 2901#ifdef INET6 2902 if (ai->ai_family == AF_INET6) { 2903 if ((rth = inet6_rth_init((void *)*cpp, sizeof(buf), 2904 IPV6_RTHDR_TYPE_0, 0)) == NULL) 2905 return -1; 2906 if (*cp != '@') 2907 return -1; 2908 *protop = IPPROTO_IPV6; 2909 *optp = IPV6_RTHDR; 2910 } else 2911#endif 2912 { 2913 /* 2914 * Next, decide whether we have a loose source 2915 * route or a strict source route, and fill in 2916 * the begining of the option. 2917 */ 2918 if (*cp == '!') { 2919 cp++; 2920 *lsrp++ = IPOPT_SSRR; 2921 } else 2922 *lsrp++ = IPOPT_LSRR; 2923 2924 if (*cp != '@') 2925 return -1; 2926 2927 lsrp++; /* skip over length, we'll fill it in later */ 2928 *lsrp++ = 4; 2929 *protop = IPPROTO_IP; 2930 *optp = IP_OPTIONS; 2931 } 2932 2933 cp++; 2934 memset(&hints, 0, sizeof(hints)); 2935 hints.ai_family = ai->ai_family; 2936 hints.ai_socktype = SOCK_STREAM; 2937 for (c = 0;;) { 2938 if ( 2939#ifdef INET6 2940 ai->ai_family != AF_INET6 && 2941#endif 2942 c == ':') 2943 cp2 = 0; 2944 else for (cp2 = cp; (c = *cp2); cp2++) { 2945 if (c == ',') { 2946 *cp2++ = '\0'; 2947 if (*cp2 == '@') 2948 cp2++; 2949 } else if (c == '@') { 2950 *cp2++ = '\0'; 2951 } else if ( 2952#ifdef INET6 2953 ai->ai_family != AF_INET6 && 2954#endif 2955 c == ':') { 2956 *cp2++ = '\0'; 2957 } else 2958 continue; 2959 break; 2960 } 2961 if (!c) 2962 cp2 = 0; 2963 2964 hints.ai_flags = AI_NUMERICHOST; 2965 error = getaddrinfo(cp, NULL, &hints, &res); 2966 if (error == EAI_NONAME) { 2967 hints.ai_flags = 0; 2968 error = getaddrinfo(cp, NULL, &hints, &res); 2969 } 2970 if (error != 0) { 2971 fprintf(stderr, "%s: %s\n", cp, gai_strerror(error)); 2972 if (error == EAI_SYSTEM) 2973 fprintf(stderr, "%s: %s\n", cp, 2974 strerror(errno)); 2975 *cpp = cp; 2976 return(0); 2977 } 2978#ifdef INET6 2979 if (res->ai_family == AF_INET6) { 2980 sin6 = (struct sockaddr_in6 *)res->ai_addr; 2981 if (inet6_rth_add((void *)rth, &sin6->sin6_addr) == -1) 2982 return(0); 2983 } else 2984#endif 2985 { 2986 _sin = (struct sockaddr_in *)res->ai_addr; 2987 memcpy(lsrp, (char *)&_sin->sin_addr, 4); 2988 lsrp += 4; 2989 } 2990 if (cp2) 2991 cp = cp2; 2992 else 2993 break; 2994 /* 2995 * Check to make sure there is space for next address 2996 */ 2997 if (lsrp + 4 > ep) 2998 return -1; 2999 freeaddrinfo(res); 3000 } 3001#ifdef INET6 3002 if (res->ai_family == AF_INET6) { 3003 rth->ip6r_len = rth->ip6r_segleft * 2; 3004 *lenp = (rth->ip6r_len + 1) << 3; 3005 } else 3006#endif 3007 { 3008 if ((*(*cpp+IPOPT_OLEN) = lsrp - *cpp) <= 7) { 3009 *cpp = 0; 3010 *lenp = 0; 3011 return -1; 3012 } 3013 *lsrp++ = IPOPT_NOP; /* 32 bit word align it */ 3014 *lenp = lsrp - *cpp; 3015 } 3016 freeaddrinfo(res); 3017 return 1; 3018} 3019