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/* Use RFC 2292 constants in <netinet6/in6.h> */ 43#define __APPLE_USE_RFC_2292 44 45#include <sys/param.h> 46#include <sys/un.h> 47#include <sys/file.h> 48#include <sys/socket.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 = { 0, 0, 0, 0, {}, 0, 0 }; 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 && strcasecmp(argv[1],"define")==0 && c->narg + 1 != 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)((unsigned char *)argv[2], (unsigned char *)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((const char *)ep->var, (const char *)var) == 0) 1628 return(ep); 1629 } 1630 return(NULL); 1631} 1632 1633void 1634env_init(void) 1635{ 1636 char *ev; 1637 struct env_lst *ep; 1638 int i; 1639 1640 const char *safe_vars[]= 1641 {"USER", "PRINTER", "DISPLAY", "TERM", "COLUMNS", "LINES"}; 1642 1643 for(i=0;i<sizeof(safe_vars)/sizeof(const char *);i++) { 1644 if((ev=getenv(safe_vars[i]))) { 1645 ep=env_define((unsigned char *)safe_vars[i],(unsigned char *)ev); 1646 ep->export=0; 1647 } 1648 } 1649 1650 /* 1651 * Special case for DISPLAY variable. If it is ":0.0" or 1652 * "unix:0.0", we have to get rid of "unix" and insert our 1653 * hostname. 1654 */ 1655 if ((ep = env_find((const unsigned char *)"DISPLAY")) 1656 && ((*ep->value == ':') 1657 || (strncmp((char *)ep->value, "unix:", 5) == 0))) { 1658 char hbuf[256+1]; 1659 char *cp, *cp2 = strchr((char *)ep->value, ':'); 1660 1661 gethostname(hbuf, 256); 1662 hbuf[256] = '\0'; 1663 cp = (char *)malloc(strlen(hbuf) + strlen(cp2) + 1); 1664 sprintf((char *)cp, "%s%s", hbuf, cp2); 1665 free(ep->value); 1666 ep->value = (unsigned char *)cp; 1667 } 1668 /* 1669 * If USER is not defined, but LOGNAME is, then add 1670 * USER with the value from LOGNAME. By default, we 1671 * don't export the USER variable. 1672 */ 1673 if ((env_find((const unsigned char *)"USER") == NULL) && (ep = env_find((const unsigned char *)"LOGNAME"))) { 1674 env_define((const unsigned char *)"USER", ep->value); 1675 env_unexport((const unsigned char *)"USER"); 1676 } 1677 env_export((const unsigned char *)"DISPLAY"); 1678 env_export((const unsigned char *)"PRINTER"); 1679} 1680 1681struct env_lst * 1682env_define(const unsigned char *var, unsigned char *value) 1683{ 1684 char *ev; 1685 struct env_lst *ep; 1686 1687 if ((ep = env_find(var))) { 1688 if (ep->var) 1689 free(ep->var); 1690 if (ep->value) 1691 free(ep->value); 1692 } else { 1693 ep = (struct env_lst *)malloc(sizeof(struct env_lst)); 1694 ep->next = envlisthead.next; 1695 envlisthead.next = ep; 1696 ep->prev = &envlisthead; 1697 if (ep->next) 1698 ep->next->prev = ep; 1699 } 1700 1701 ep->welldefined = opt_welldefined((const char *)var); 1702 ep->export = 1; 1703 ep->var = (unsigned char *)strdup((const char *)var); 1704 1705 if(value) 1706 ep->value = (unsigned char *)strdup((const char *)value); 1707 else if((ev=getenv((const char *)var))) 1708 ep->value = (unsigned char *)strdup(ev); 1709 else ep->value = (unsigned char *)strdup(""); 1710 return(ep); 1711} 1712 1713void 1714env_undefine(unsigned char *var) 1715{ 1716 struct env_lst *ep; 1717 1718 if ((ep = env_find(var))) { 1719 ep->prev->next = ep->next; 1720 if (ep->next) 1721 ep->next->prev = ep->prev; 1722 if (ep->var) 1723 free(ep->var); 1724 if (ep->value) 1725 free(ep->value); 1726 free(ep); 1727 } 1728} 1729 1730void 1731env_export(const unsigned char *var) 1732{ 1733 struct env_lst *ep; 1734 1735 if ((ep = env_find(var))) 1736 ep->export = 1; 1737} 1738 1739void 1740env_unexport(const unsigned char *var) 1741{ 1742 struct env_lst *ep; 1743 1744 if ((ep = env_find(var))) 1745 ep->export = 0; 1746} 1747 1748void 1749env_send(unsigned char *var) 1750{ 1751 struct env_lst *ep; 1752 1753 if (my_state_is_wont(TELOPT_NEW_ENVIRON) 1754#ifdef OLD_ENVIRON 1755 && my_state_is_wont(TELOPT_OLD_ENVIRON) 1756#endif 1757 ) { 1758 fprintf(stderr, 1759 "Cannot send '%s': Telnet ENVIRON option not enabled\n", 1760 var); 1761 return; 1762 } 1763 ep = env_find(var); 1764 if (ep == 0) { 1765 fprintf(stderr, "Cannot send '%s': variable not defined\n", 1766 var); 1767 return; 1768 } 1769 env_opt_start_info(); 1770 env_opt_add(ep->var); 1771 env_opt_end(0); 1772} 1773 1774void 1775env_list(void) 1776{ 1777 struct env_lst *ep; 1778 1779 for (ep = envlisthead.next; ep; ep = ep->next) { 1780 printf("%c %-20s %s\n", ep->export ? '*' : ' ', 1781 ep->var, ep->value); 1782 } 1783} 1784 1785unsigned char * 1786env_default(int init, int welldefined) 1787{ 1788 static struct env_lst *nep = NULL; 1789 1790 if (init) { 1791 nep = &envlisthead; 1792 return(NULL); 1793 } 1794 if (nep) { 1795 while ((nep = nep->next)) { 1796 if (nep->export && (nep->welldefined == welldefined)) 1797 return(nep->var); 1798 } 1799 } 1800 return(NULL); 1801} 1802 1803unsigned char * 1804env_getvalue(const unsigned char *var) 1805{ 1806 struct env_lst *ep; 1807 1808 if ((ep = env_find(var))) 1809 return(ep->value); 1810 return(NULL); 1811} 1812 1813#if defined(OLD_ENVIRON) && defined(ENV_HACK) 1814void 1815env_varval(unsigned char *what) 1816{ 1817 extern int old_env_var, old_env_value, env_auto; 1818 int len = strlen((char *)what); 1819 1820 if (len == 0) 1821 goto unknown; 1822 1823 if (strncasecmp((char *)what, "status", len) == 0) { 1824 if (env_auto) 1825 printf("%s%s", "VAR and VALUE are/will be ", 1826 "determined automatically\n"); 1827 if (old_env_var == OLD_ENV_VAR) 1828 printf("VAR and VALUE set to correct definitions\n"); 1829 else 1830 printf("VAR and VALUE definitions are reversed\n"); 1831 } else if (strncasecmp((char *)what, "auto", len) == 0) { 1832 env_auto = 1; 1833 old_env_var = OLD_ENV_VALUE; 1834 old_env_value = OLD_ENV_VAR; 1835 } else if (strncasecmp((char *)what, "right", len) == 0) { 1836 env_auto = 0; 1837 old_env_var = OLD_ENV_VAR; 1838 old_env_value = OLD_ENV_VALUE; 1839 } else if (strncasecmp((char *)what, "wrong", len) == 0) { 1840 env_auto = 0; 1841 old_env_var = OLD_ENV_VALUE; 1842 old_env_value = OLD_ENV_VAR; 1843 } else { 1844unknown: 1845 printf("Unknown \"varval\" command. (\"auto\", \"right\", \"wrong\", \"status\")\n"); 1846 } 1847} 1848#endif 1849 1850#ifdef AUTHENTICATION 1851/* 1852 * The AUTHENTICATE command. 1853 */ 1854 1855struct authlist { 1856 const char *name; 1857 const char *help; 1858 int (*handler)(char *); 1859 int narg; 1860}; 1861 1862extern int 1863 auth_enable(char *), 1864 auth_disable(char *), 1865 auth_status(void); 1866static int 1867 auth_help(void); 1868 1869struct authlist AuthList[] = { 1870 { "status", "Display current status of authentication information", 1871 (int (*)(char *))auth_status, 0 }, 1872 { "disable", "Disable an authentication type ('auth disable ?' for more)", 1873 auth_disable, 1 }, 1874 { "enable", "Enable an authentication type ('auth enable ?' for more)", 1875 auth_enable, 1 }, 1876 { "help", NULL, (int (*)(char *))auth_help, 0 }, 1877 { "?", "Print help information", (int (*)(char *))auth_help, 0 }, 1878 { NULL, NULL, NULL, 0 }, 1879}; 1880 1881static int 1882auth_help(void) 1883{ 1884 struct authlist *c; 1885 1886 for (c = AuthList; c->name; c++) { 1887 if (c->help) { 1888 if (*c->help) 1889 printf("%-15s %s\n", c->name, c->help); 1890 else 1891 printf("\n"); 1892 } 1893 } 1894 return 0; 1895} 1896 1897int 1898auth_cmd(int argc, char *argv[]) 1899{ 1900 struct authlist *c; 1901 1902 if (argc < 2) { 1903 fprintf(stderr, 1904 "Need an argument to 'auth' command. 'auth ?' for help.\n"); 1905 return 0; 1906 } 1907 1908 c = (struct authlist *) 1909 genget(argv[1], (char **) AuthList, sizeof(struct authlist)); 1910 if (c == 0) { 1911 fprintf(stderr, "'%s': unknown argument ('auth ?' for help).\n", 1912 argv[1]); 1913 return 0; 1914 } 1915 if (Ambiguous((void *)c)) { 1916 fprintf(stderr, "'%s': ambiguous argument ('auth ?' for help).\n", 1917 argv[1]); 1918 return 0; 1919 } 1920 if (c->narg + 2 != argc) { 1921 fprintf(stderr, 1922 "Need %s%d argument%s to 'auth %s' command. 'auth ?' for help.\n", 1923 c->narg < argc + 2 ? "only " : "", 1924 c->narg, c->narg == 1 ? "" : "s", c->name); 1925 return 0; 1926 } 1927 return((*c->handler)(argv[2])); 1928} 1929#endif 1930 1931#ifdef ENCRYPTION 1932/* 1933 * The ENCRYPT command. 1934 */ 1935 1936struct encryptlist { 1937 const char *name; 1938 const char *help; 1939 int (*handler)(char *, char *); 1940 int needconnect; 1941 int minarg; 1942 int maxarg; 1943}; 1944 1945extern int 1946 EncryptEnable(char *, char *), 1947 EncryptDisable(char *, char *), 1948 EncryptType(char *, char *), 1949 EncryptStart(char *), 1950 EncryptStartInput(void), 1951 EncryptStartOutput(void), 1952 EncryptStop(char *), 1953 EncryptStopInput(void), 1954 EncryptStopOutput(void), 1955 EncryptStatus(void); 1956static int 1957 EncryptHelp(void); 1958 1959struct encryptlist EncryptList[] = { 1960 { "enable", "Enable encryption. ('encrypt enable ?' for more)", 1961 EncryptEnable, 1, 1, 2 }, 1962 { "disable", "Disable encryption. ('encrypt enable ?' for more)", 1963 EncryptDisable, 0, 1, 2 }, 1964 { "type", "Set encryption type. ('encrypt type ?' for more)", 1965 EncryptType, 0, 1, 1 }, 1966 { "start", "Start encryption. ('encrypt start ?' for more)", 1967 (int (*)(char *, char *))EncryptStart, 1, 0, 1 }, 1968 { "stop", "Stop encryption. ('encrypt stop ?' for more)", 1969 (int (*)(char *, char *))EncryptStop, 1, 0, 1 }, 1970 { "input", "Start encrypting the input stream", 1971 (int (*)(char *, char *))EncryptStartInput, 1, 0, 0 }, 1972 { "-input", "Stop encrypting the input stream", 1973 (int (*)(char *, char *))EncryptStopInput, 1, 0, 0 }, 1974 { "output", "Start encrypting the output stream", 1975 (int (*)(char *, char *))EncryptStartOutput, 1, 0, 0 }, 1976 { "-output", "Stop encrypting the output stream", 1977 (int (*)(char *, char *))EncryptStopOutput, 1, 0, 0 }, 1978 1979 { "status", "Display current status of authentication information", 1980 (int (*)(char *, char *))EncryptStatus, 0, 0, 0 }, 1981 { "help", NULL, (int (*)(char *, char *))EncryptHelp, 0, 0, 0 }, 1982 { "?", "Print help information", (int (*)(char *, char *))EncryptHelp, 0, 0, 0 }, 1983 { NULL, NULL, NULL, 0, 0, 0 }, 1984}; 1985 1986static int 1987EncryptHelp(void) 1988{ 1989 struct encryptlist *c; 1990 1991 for (c = EncryptList; c->name; c++) { 1992 if (c->help) { 1993 if (*c->help) 1994 printf("%-15s %s\n", c->name, c->help); 1995 else 1996 printf("\n"); 1997 } 1998 } 1999 return 0; 2000} 2001 2002static int 2003encrypt_cmd(int argc, char *argv[]) 2004{ 2005 struct encryptlist *c; 2006 2007 if (argc < 2) { 2008 fprintf(stderr, 2009 "Need an argument to 'encrypt' command. 'encrypt ?' for help.\n"); 2010 return 0; 2011 } 2012 2013 c = (struct encryptlist *) 2014 genget(argv[1], (char **) EncryptList, sizeof(struct encryptlist)); 2015 if (c == 0) { 2016 fprintf(stderr, "'%s': unknown argument ('encrypt ?' for help).\n", 2017 argv[1]); 2018 return 0; 2019 } 2020 if (Ambiguous((void *)c)) { 2021 fprintf(stderr, "'%s': ambiguous argument ('encrypt ?' for help).\n", 2022 argv[1]); 2023 return 0; 2024 } 2025 argc -= 2; 2026 if (argc < c->minarg || argc > c->maxarg) { 2027 if (c->minarg == c->maxarg) { 2028 fprintf(stderr, "Need %s%d argument%s ", 2029 c->minarg < argc ? "only " : "", c->minarg, 2030 c->minarg == 1 ? "" : "s"); 2031 } else { 2032 fprintf(stderr, "Need %s%d-%d arguments ", 2033 c->maxarg < argc ? "only " : "", c->minarg, c->maxarg); 2034 } 2035 fprintf(stderr, "to 'encrypt %s' command. 'encrypt ?' for help.\n", 2036 c->name); 2037 return 0; 2038 } 2039 if (c->needconnect && !connected) { 2040 if (!(argc && (isprefix(argv[2], "help") || isprefix(argv[2], "?")))) { 2041 printf("?Need to be connected first.\n"); 2042 return 0; 2043 } 2044 } 2045 return ((*c->handler)(argc > 0 ? argv[2] : 0, 2046 argc > 1 ? argv[3] : 0)); 2047} 2048#endif /* ENCRYPTION */ 2049 2050/* 2051 * Print status about the connection. 2052 */ 2053/*ARGSUSED*/ 2054static int 2055status(int argc, char *argv[]) 2056{ 2057 if (connected) { 2058 printf("Connected to %s.\n", hostname); 2059 if ((argc < 2) || strcmp(argv[1], "notmuch")) { 2060 int mode = getconnmode(); 2061 2062 if (my_want_state_is_will(TELOPT_LINEMODE)) { 2063 printf("Operating with LINEMODE option\n"); 2064 printf("%s line editing\n", (mode&MODE_EDIT) ? "Local" : "No"); 2065 printf("%s catching of signals\n", 2066 (mode&MODE_TRAPSIG) ? "Local" : "No"); 2067 slcstate(); 2068#ifdef KLUDGELINEMODE 2069 } else if (kludgelinemode && my_want_state_is_dont(TELOPT_SGA)) { 2070 printf("Operating in obsolete linemode\n"); 2071#endif 2072 } else { 2073 printf("Operating in single character mode\n"); 2074 if (localchars) 2075 printf("Catching signals locally\n"); 2076 } 2077 printf("%s character echo\n", (mode&MODE_ECHO) ? "Local" : "Remote"); 2078 if (my_want_state_is_will(TELOPT_LFLOW)) 2079 printf("%s flow control\n", (mode&MODE_FLOW) ? "Local" : "No"); 2080#ifdef ENCRYPTION 2081 encrypt_display(); 2082#endif /* ENCRYPTION */ 2083 } 2084 } else { 2085 printf("No connection.\n"); 2086 } 2087 printf("Escape character is '%s'.\n", control(escape)); 2088 (void) fflush(stdout); 2089 return 1; 2090} 2091 2092#ifdef SIGINFO 2093/* 2094 * Function that gets called when SIGINFO is received. 2095 */ 2096void 2097ayt_status(void) 2098{ 2099 (void) call(status, "status", "notmuch", 0); 2100} 2101#endif 2102 2103static const char * 2104sockaddr_ntop(struct sockaddr *sa) 2105{ 2106 void *addr; 2107 static char addrbuf[INET6_ADDRSTRLEN]; 2108 2109 switch (sa->sa_family) { 2110 case AF_INET: 2111 addr = &((struct sockaddr_in *)sa)->sin_addr; 2112 break; 2113 case AF_UNIX: 2114 addr = &((struct sockaddr_un *)sa)->sun_path; 2115 break; 2116#ifdef INET6 2117 case AF_INET6: 2118 addr = &((struct sockaddr_in6 *)sa)->sin6_addr; 2119 break; 2120#endif 2121 default: 2122 return NULL; 2123 } 2124 inet_ntop(sa->sa_family, addr, addrbuf, sizeof(addrbuf)); 2125 return addrbuf; 2126} 2127 2128#if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC) 2129static int 2130setpolicy(int lnet, struct addrinfo *res, char *policy) 2131{ 2132 char *buf; 2133 int level; 2134 int optname; 2135 2136 if (policy == NULL) 2137 return 0; 2138 2139 buf = ipsec_set_policy(policy, strlen(policy)); 2140 if (buf == NULL) { 2141 printf("%s\n", ipsec_strerror()); 2142 return -1; 2143 } 2144 level = res->ai_family == AF_INET ? IPPROTO_IP : IPPROTO_IPV6; 2145 optname = res->ai_family == AF_INET ? IP_IPSEC_POLICY : IPV6_IPSEC_POLICY; 2146 if (setsockopt(lnet, level, optname, buf, ipsec_get_policylen(buf)) < 0){ 2147 perror("setsockopt"); 2148 return -1; 2149 } 2150 2151 free(buf); 2152 return 0; 2153} 2154#endif 2155 2156#ifdef INET6 2157/* 2158 * When an Address Family related error happend, check if retry with 2159 * another AF is possible or not. 2160 * Return 1, if retry with another af is OK. Else, return 0. 2161 */ 2162static int 2163switch_af(struct addrinfo **aip) 2164{ 2165 int nextaf; 2166 struct addrinfo *ai; 2167 2168 ai = *aip; 2169 nextaf = (ai->ai_family == AF_INET) ? AF_INET6 : AF_INET; 2170 do 2171 ai=ai->ai_next; 2172 while (ai != NULL && ai->ai_family != nextaf); 2173 *aip = ai; 2174 if (*aip != NULL) { 2175 return 1; 2176 } 2177 return 0; 2178} 2179#endif 2180 2181int 2182tn(int argc, char *argv[]) 2183{ 2184 char *srp = 0; 2185 int proto = 0, opt = 0; 2186 int srlen = 0; 2187 int srcroute = 0, result; 2188 char *cmd, *hostp = 0, *portp = 0, *user = 0; 2189 char *src_addr = NULL; 2190 struct addrinfo hints, *res, *res0 = NULL, *src_res, *src_res0 = NULL; 2191 int error = 0, af_error = 0; 2192 2193 if (connected) { 2194 printf("?Already connected to %s\n", hostname); 2195 setuid(getuid()); 2196 return 0; 2197 } 2198 if (argc < 2) { 2199 (void) strcpy(line, "open "); 2200 printf("(to) "); 2201 (void) fgets(&line[strlen(line)], sizeof(line) - strlen(line), stdin); 2202 makeargv(); 2203 argc = margc; 2204 argv = margv; 2205 } 2206 cmd = *argv; 2207 --argc; ++argv; 2208 while (argc) { 2209 if (strcmp(*argv, "help") == 0 || isprefix(*argv, "?")) 2210 goto usage; 2211 if (strcmp(*argv, "-l") == 0) { 2212 --argc; ++argv; 2213 if (argc == 0) 2214 goto usage; 2215 user = *argv++; 2216 --argc; 2217 continue; 2218 } 2219 if (strcmp(*argv, "-a") == 0) { 2220 --argc; ++argv; 2221 autologin = 1; 2222 continue; 2223 } 2224 if (strcmp(*argv, "-s") == 0) { 2225 --argc; ++argv; 2226 if (argc == 0) 2227 goto usage; 2228 src_addr = *argv++; 2229 --argc; 2230 continue; 2231 } 2232 if (hostp == 0) { 2233 hostp = *argv++; 2234 --argc; 2235 continue; 2236 } 2237 if (portp == 0) { 2238 portp = *argv++; 2239 --argc; 2240 continue; 2241 } 2242 usage: 2243 printf("usage: %s [-l user] [-a] [-s src_addr] host-name [port]\n", cmd); 2244 setuid(getuid()); 2245 return 0; 2246 } 2247 if (hostp == 0) 2248 goto usage; 2249 2250 if (src_addr != NULL) { 2251 memset(&hints, 0, sizeof(hints)); 2252 hints.ai_flags = AI_NUMERICHOST; 2253 hints.ai_family = family; 2254 hints.ai_socktype = SOCK_STREAM; 2255 error = getaddrinfo(src_addr, 0, &hints, &src_res); 2256#ifdef EAI_NODATA 2257 if ((error == EAI_NODATA) || (error == EAI_NONAME)) 2258#else 2259 if (error == EAI_NONAME) 2260#endif 2261 { 2262 hints.ai_flags = 0; 2263 error = getaddrinfo(src_addr, 0, &hints, &src_res); 2264 } 2265 if (error != 0) { 2266 fprintf(stderr, "%s: %s\n", src_addr, gai_strerror(error)); 2267 if (error == EAI_SYSTEM) 2268 fprintf(stderr, "%s: %s\n", src_addr, strerror(errno)); 2269 setuid(getuid()); 2270 return 0; 2271 } 2272 src_res0 = src_res; 2273 } 2274 if (hostp[0] == '/') { 2275 struct sockaddr_un su; 2276 2277 if (strlen(hostp) >= sizeof(su.sun_path)) { 2278 fprintf(stderr, "hostname too long for unix domain socket: %s", 2279 hostp); 2280 goto fail; 2281 } 2282 memset(&su, 0, sizeof su); 2283 su.sun_family = AF_UNIX; 2284 strncpy(su.sun_path, hostp, sizeof su.sun_path); 2285 printf("Trying %s...\n", hostp); 2286 net = socket(PF_UNIX, SOCK_STREAM, 0); 2287 if ( net < 0) { 2288 perror("socket"); 2289 goto fail; 2290 } 2291 if (connect(net, (struct sockaddr *)&su, sizeof su) == -1) { 2292 perror(su.sun_path); 2293 (void) NetClose(net); 2294 goto fail; 2295 } 2296 goto af_unix; 2297 } else if (hostp[0] == '@' || hostp[0] == '!') { 2298 if ( 2299#ifdef INET6 2300 family == AF_INET6 || 2301#endif 2302 (hostname = strrchr(hostp, ':')) == NULL) 2303 hostname = strrchr(hostp, '@'); 2304 if (hostname == NULL) { 2305 hostname = hostp; 2306 } else { 2307 hostname++; 2308 srcroute = 1; 2309 } 2310 } else 2311 hostname = hostp; 2312 if (!portp) { 2313 telnetport = 1; 2314 portp = strdup("telnet"); 2315 } else if (*portp == '-') { 2316 portp++; 2317 telnetport = 1; 2318 } else if (*portp == '+') { 2319 portp++; 2320 telnetport = -1; 2321 } else 2322 telnetport = 0; 2323 2324#ifdef __APPLE__ 2325 { 2326 /* 2327 * 5760578: Attempt to convert service name to a 2328 * numeric port before calling getaddrinfo(). 2329 */ 2330 struct servent *srv = getservbyname(portp, NULL); 2331 if (srv != NULL) { 2332 asprintf(&portp, "%d", ntohs(srv->s_port)); 2333 } 2334 } 2335#endif /* __APPLE__ */ 2336 2337 memset(&hints, 0, sizeof(hints)); 2338 hints.ai_flags = AI_NUMERICHOST; 2339 hints.ai_family = family; 2340 hints.ai_socktype = SOCK_STREAM; 2341 error = getaddrinfo(hostname, portp, &hints, &res); 2342 if (error) { 2343 hints.ai_flags = AI_CANONNAME; 2344 error = getaddrinfo(hostname, portp, &hints, &res); 2345 } 2346 if (error != 0) { 2347 fprintf(stderr, "%s: %s\n", hostname, gai_strerror(error)); 2348 if (error == EAI_SYSTEM) 2349 fprintf(stderr, "%s: %s\n", hostname, strerror(errno)); 2350 setuid(getuid()); 2351 goto fail; 2352 } 2353 if (hints.ai_flags == AI_NUMERICHOST) { 2354 /* hostname has numeric */ 2355 int gni_err = 1; 2356 2357 if (doaddrlookup) 2358 gni_err = getnameinfo(res->ai_addr, res->ai_addr->sa_len, 2359 _hostname, sizeof(_hostname) - 1, NULL, 0, 2360 NI_NAMEREQD); 2361 if (gni_err != 0) 2362 (void) strncpy(_hostname, hostp, sizeof(_hostname) - 1); 2363 _hostname[sizeof(_hostname)-1] = '\0'; 2364 hostname = _hostname; 2365 } else { 2366 /* hostname has FQDN */ 2367 if (srcroute != 0) 2368 (void) strncpy(_hostname, hostname, sizeof(_hostname) - 1); 2369 else if (res->ai_canonname != NULL) 2370 strncpy(_hostname, res->ai_canonname, sizeof(_hostname) - 1); 2371 else 2372 (void) strncpy(_hostname, hostp, sizeof(_hostname) - 1); 2373 _hostname[sizeof(_hostname)-1] = '\0'; 2374 hostname = _hostname; 2375 } 2376 res0 = res; 2377 #ifdef INET6 2378 af_again: 2379 #endif 2380 if (srcroute != 0) { 2381 static char hostbuf[BUFSIZ]; 2382 2383 if (af_error == 0) { /* save intermediate hostnames for retry */ 2384 strncpy(hostbuf, hostp, BUFSIZ - 1); 2385 hostbuf[BUFSIZ - 1] = '\0'; 2386 } else 2387 hostp = hostbuf; 2388 srp = 0; 2389 result = sourceroute(res, hostp, &srp, &srlen, &proto, &opt); 2390 if (result == 0) { 2391#ifdef INET6 2392 if (family == AF_UNSPEC && af_error == 0 && 2393 switch_af(&res) == 1) { 2394 af_error = 1; 2395 goto af_again; 2396 } 2397#endif 2398 setuid(getuid()); 2399 goto fail; 2400 } else if (result == -1) { 2401 printf("Bad source route option: %s\n", hostp); 2402 setuid(getuid()); 2403 goto fail; 2404 } 2405 } 2406 do { 2407 printf("Trying %s...\n", sockaddr_ntop(res->ai_addr)); 2408 net = socket(res->ai_family, res->ai_socktype, res->ai_protocol); 2409 setuid(getuid()); 2410 if (net < 0) { 2411#ifdef INET6 2412 if (family == AF_UNSPEC && af_error == 0 && 2413 switch_af(&res) == 1) { 2414 af_error = 1; 2415 goto af_again; 2416 } 2417#endif 2418 perror("telnet: socket"); 2419 goto fail; 2420 } 2421 if (srp && setsockopt(net, proto, opt, (char *)srp, srlen) < 0) 2422 perror("setsockopt (source route)"); 2423#if defined(IPPROTO_IP) && defined(IP_TOS) 2424 if (res->ai_family == PF_INET) { 2425# if defined(HAS_GETTOS) 2426 struct tosent *tp; 2427 if (tos < 0 && (tp = gettosbyname("telnet", "tcp"))) 2428 tos = tp->t_tos; 2429# endif 2430 if (tos < 0) 2431 tos = IPTOS_LOWDELAY; 2432 if (tos 2433 && (setsockopt(net, IPPROTO_IP, IP_TOS, 2434 (char *)&tos, sizeof(int)) < 0) 2435 && (errno != ENOPROTOOPT)) 2436 perror("telnet: setsockopt (IP_TOS) (ignored)"); 2437 } 2438#endif /* defined(IPPROTO_IP) && defined(IP_TOS) */ 2439 2440 if (telnet_debug && SetSockOpt(net, SOL_SOCKET, SO_DEBUG, 1) < 0) { 2441 perror("setsockopt (SO_DEBUG)"); 2442 } 2443 2444 if (src_addr != NULL) { 2445 for (src_res = src_res0; src_res != 0; src_res = src_res->ai_next) 2446 if (src_res->ai_family == res->ai_family) 2447 break; 2448 if (src_res == NULL) 2449 src_res = src_res0; 2450 if (bind(net, src_res->ai_addr, src_res->ai_addrlen) == -1) { 2451#ifdef INET6 2452 if (family == AF_UNSPEC && af_error == 0 && 2453 switch_af(&res) == 1) { 2454 af_error = 1; 2455 (void) NetClose(net); 2456 goto af_again; 2457 } 2458#endif 2459 perror("bind"); 2460 (void) NetClose(net); 2461 goto fail; 2462 } 2463 } 2464#if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC) 2465 if (setpolicy(net, res, ipsec_policy_in) < 0) { 2466 (void) NetClose(net); 2467 goto fail; 2468 } 2469 if (setpolicy(net, res, ipsec_policy_out) < 0) { 2470 (void) NetClose(net); 2471 goto fail; 2472 } 2473#endif 2474 2475 if (connect(net, res->ai_addr, res->ai_addrlen) < 0) { 2476 struct addrinfo *next; 2477 2478 next = res->ai_next; 2479 /* If already an af failed, only try same af. */ 2480 if (af_error != 0) 2481 while (next != NULL && next->ai_family != res->ai_family) 2482 next = next->ai_next; 2483 warn("connect to address %s", sockaddr_ntop(res->ai_addr)); 2484 if (next != NULL) { 2485 res = next; 2486 (void) NetClose(net); 2487 continue; 2488 } 2489 warnx("Unable to connect to remote host"); 2490 (void) NetClose(net); 2491 goto fail; 2492 } 2493 connected++; 2494#ifdef AUTHENTICATION 2495#ifdef ENCRYPTION 2496 auth_encrypt_connect(connected); 2497#endif 2498#endif 2499 } while (connected == 0); 2500 freeaddrinfo(res0); 2501 if (src_res0 != NULL) 2502 freeaddrinfo(src_res0); 2503 cmdrc(hostp, hostname); 2504 af_unix: 2505 connected = 1; 2506 if (autologin && user == NULL) { 2507 struct passwd *pw; 2508 2509 user = getenv("USER"); 2510 if (user == NULL || 2511 ((pw = getpwnam(user)) && pw->pw_uid != getuid())) { 2512 if ((pw = getpwuid(getuid()))) 2513 user = pw->pw_name; 2514 else 2515 user = NULL; 2516 } 2517 } 2518 if (user) { 2519 env_define((unsigned char*)"USER", (unsigned char*)user); 2520 env_export((unsigned char*)"USER"); 2521 } 2522 (void) call(status, "status", "notmuch", 0); 2523 if (setjmp(peerdied) == 0) 2524 telnet(user); 2525 (void) NetClose(net); 2526 ExitString("Connection closed by foreign host.\n",1); 2527 /*NOTREACHED*/ 2528 fail: 2529 if (res0 != NULL) 2530 freeaddrinfo(res0); 2531 if (src_res0 != NULL) 2532 freeaddrinfo(src_res0); 2533 return 0; 2534} 2535 2536#define HELPINDENT (sizeof ("connect")) 2537 2538static char 2539 openhelp[] = "connect to a site", 2540 closehelp[] = "close current connection", 2541 logouthelp[] = "forcibly logout remote user and close the connection", 2542 quithelp[] = "exit telnet", 2543 statushelp[] = "print status information", 2544 helphelp[] = "print help information", 2545 sendhelp[] = "transmit special characters ('send ?' for more)", 2546 sethelp[] = "set operating parameters ('set ?' for more)", 2547 unsethelp[] = "unset operating parameters ('unset ?' for more)", 2548 togglestring[] ="toggle operating parameters ('toggle ?' for more)", 2549 slchelp[] = "change state of special charaters ('slc ?' for more)", 2550 displayhelp[] = "display operating parameters", 2551#ifdef AUTHENTICATION 2552 authhelp[] = "turn on (off) authentication ('auth ?' for more)", 2553#endif 2554#ifdef ENCRYPTION 2555 encrypthelp[] = "turn on (off) encryption ('encrypt ?' for more)", 2556#endif /* ENCRYPTION */ 2557 zhelp[] = "suspend telnet", 2558#ifdef OPIE 2559 opiehelp[] = "compute response to OPIE challenge", 2560#endif 2561 shellhelp[] = "invoke a subshell", 2562 envhelp[] = "change environment variables ('environ ?' for more)", 2563 modestring[] = "try to enter line or character mode ('mode ?' for more)"; 2564 2565static Command cmdtab[] = { 2566 { "close", closehelp, bye, 1 }, 2567 { "logout", logouthelp, (int (*)(int, char **))logout, 1 }, 2568 { "display", displayhelp, display, 0 }, 2569 { "mode", modestring, modecmd, 0 }, 2570 { "telnet", openhelp, tn, 0 }, 2571 { "open", openhelp, tn, 0 }, 2572 { "quit", quithelp, (int (*)(int, char **))quit, 0 }, 2573 { "send", sendhelp, sendcmd, 0 }, 2574 { "set", sethelp, setcmd, 0 }, 2575 { "unset", unsethelp, unsetcmd, 0 }, 2576 { "status", statushelp, status, 0 }, 2577 { "toggle", togglestring, toggle, 0 }, 2578 { "slc", slchelp, slccmd, 0 }, 2579#ifdef AUTHENTICATION 2580 { "auth", authhelp, auth_cmd, 0 }, 2581#endif 2582#ifdef ENCRYPTION 2583 { "encrypt", encrypthelp, encrypt_cmd, 0 }, 2584#endif /* ENCRYPTION */ 2585 { "z", zhelp, (int (*)(int, char **))suspend, 0 }, 2586 { "!", shellhelp, shell, 1 }, 2587 { "environ", envhelp, env_cmd, 0 }, 2588 { "?", helphelp, help, 0 }, 2589#ifdef OPIE 2590 { "opie", opiehelp, opie_calc, 0 }, 2591#endif 2592 { NULL, NULL, NULL, 0 } 2593}; 2594 2595static char crmodhelp[] = "deprecated command -- use 'toggle crmod' instead"; 2596static char escapehelp[] = "deprecated command -- use 'set escape' instead"; 2597 2598static Command cmdtab2[] = { 2599 { "help", 0, help, 0 }, 2600 { "escape", escapehelp, setescape, 0 }, 2601 { "crmod", crmodhelp, (int (*)(int, char **))togcrmod, 0 }, 2602 { NULL, NULL, NULL, 0 } 2603}; 2604 2605 2606/* 2607 * Call routine with argc, argv set from args (terminated by 0). 2608 */ 2609 2610static int 2611call(intrtn_t routine, ...) 2612{ 2613 va_list ap; 2614 char *args[100]; 2615 int argno = 0; 2616 2617 va_start(ap, routine); 2618 while ((args[argno++] = va_arg(ap, char *)) != 0); 2619 va_end(ap); 2620 return (*routine)(argno-1, args); 2621} 2622 2623 2624static Command * 2625getcmd(char *name) 2626{ 2627 Command *cm; 2628 2629 if ((cm = (Command *) genget(name, (char **) cmdtab, sizeof(Command)))) 2630 return cm; 2631 return (Command *) genget(name, (char **) cmdtab2, sizeof(Command)); 2632} 2633 2634void 2635command(int top, const char *tbuf, int cnt) 2636{ 2637 Command *c; 2638 2639 setcommandmode(); 2640 if (!top) { 2641 putchar('\n'); 2642 } else { 2643 (void) signal(SIGINT, SIG_DFL); 2644 (void) signal(SIGQUIT, SIG_DFL); 2645 } 2646 for (;;) { 2647 if (rlogin == _POSIX_VDISABLE) 2648 printf("%s> ", prompt); 2649 if (tbuf) { 2650 char *cp; 2651 cp = line; 2652 while (cnt > 0 && (*cp++ = *tbuf++) != '\n') 2653 cnt--; 2654 tbuf = 0; 2655 if (cp == line || *--cp != '\n' || cp == line) 2656 goto getline; 2657 *cp = '\0'; 2658 if (rlogin == _POSIX_VDISABLE) 2659 printf("%s\n", line); 2660 } else { 2661 getline: 2662 if (rlogin != _POSIX_VDISABLE) 2663 printf("%s> ", prompt); 2664 if (fgets(line, sizeof(line), stdin) == NULL) { 2665 if (feof(stdin) || ferror(stdin)) { 2666 (void) quit(); 2667 /*NOTREACHED*/ 2668 } 2669 break; 2670 } 2671 } 2672 if (line[0] == 0) 2673 break; 2674 makeargv(); 2675 if (margv[0] == 0) { 2676 break; 2677 } 2678 c = getcmd(margv[0]); 2679 if (Ambiguous((void *)c)) { 2680 printf("?Ambiguous command\n"); 2681 continue; 2682 } 2683 if (c == 0) { 2684 printf("?Invalid command\n"); 2685 continue; 2686 } 2687 if (c->needconnect && !connected) { 2688 printf("?Need to be connected first.\n"); 2689 continue; 2690 } 2691 if ((*c->handler)(margc, margv)) { 2692 break; 2693 } 2694 } 2695 if (!top) { 2696 if (!connected) { 2697 longjmp(toplevel, 1); 2698 /*NOTREACHED*/ 2699 } 2700 setconnmode(0); 2701 } 2702} 2703 2704/* 2705 * Help command. 2706 */ 2707static int 2708help(int argc, char *argv[]) 2709{ 2710 Command *c; 2711 2712 if (argc == 1) { 2713 printf("Commands may be abbreviated. Commands are:\n\n"); 2714 for (c = cmdtab; c->name; c++) 2715 if (c->help) { 2716 printf("%-*s\t%s\n", (int)HELPINDENT, c->name, 2717 c->help); 2718 } 2719 return 0; 2720 } 2721 else while (--argc > 0) { 2722 char *arg; 2723 arg = *++argv; 2724 c = getcmd(arg); 2725 if (Ambiguous((void *)c)) 2726 printf("?Ambiguous help command %s\n", arg); 2727 else if (c == (Command *)0) 2728 printf("?Invalid help command %s\n", arg); 2729 else 2730 printf("%s\n", c->help); 2731 } 2732 return 0; 2733} 2734 2735static char *rcname = 0; 2736static char rcbuf[128]; 2737 2738void 2739cmdrc(char *m1, char *m2) 2740{ 2741 Command *c; 2742 FILE *rcfile; 2743 int gotmachine = 0; 2744 int l1 = strlen(m1); 2745 int l2 = strlen(m2); 2746 char m1save[MAXHOSTNAMELEN]; 2747 2748 if (skiprc) 2749 return; 2750 2751 strlcpy(m1save, m1, sizeof(m1save)); 2752 m1 = m1save; 2753 2754 if (rcname == 0) { 2755 rcname = getenv("HOME"); 2756 if (rcname && (strlen(rcname) + 10) < sizeof(rcbuf)) 2757 strcpy(rcbuf, rcname); 2758 else 2759 rcbuf[0] = '\0'; 2760 strcat(rcbuf, "/.telnetrc"); 2761 rcname = rcbuf; 2762 } 2763 2764 if ((rcfile = fopen(rcname, "r")) == 0) { 2765 return; 2766 } 2767 2768 for (;;) { 2769 if (fgets(line, sizeof(line), rcfile) == NULL) 2770 break; 2771 if (line[0] == 0) 2772 break; 2773 if (line[0] == '#') 2774 continue; 2775 if (gotmachine) { 2776 if (!isspace(line[0])) 2777 gotmachine = 0; 2778 } 2779 if (gotmachine == 0) { 2780 if (isspace(line[0])) 2781 continue; 2782 if (strncasecmp(line, m1, l1) == 0) 2783 strncpy(line, &line[l1], sizeof(line) - l1); 2784 else if (strncasecmp(line, m2, l2) == 0) 2785 strncpy(line, &line[l2], sizeof(line) - l2); 2786 else if (strncasecmp(line, "DEFAULT", 7) == 0) 2787 strncpy(line, &line[7], sizeof(line) - 7); 2788 else 2789 continue; 2790 if (line[0] != ' ' && line[0] != '\t' && line[0] != '\n') 2791 continue; 2792 gotmachine = 1; 2793 } 2794 makeargv(); 2795 if (margv[0] == 0) 2796 continue; 2797 c = getcmd(margv[0]); 2798 if (Ambiguous((void *)c)) { 2799 printf("?Ambiguous command: %s\n", margv[0]); 2800 continue; 2801 } 2802 if (c == 0) { 2803 printf("?Invalid command: %s\n", margv[0]); 2804 continue; 2805 } 2806 /* 2807 * This should never happen... 2808 */ 2809 if (c->needconnect && !connected) { 2810 printf("?Need to be connected first for %s.\n", margv[0]); 2811 continue; 2812 } 2813 (*c->handler)(margc, margv); 2814 } 2815 fclose(rcfile); 2816} 2817 2818/* 2819 * Source route is handed in as 2820 * [!]@hop1@hop2...[@|:]dst 2821 * If the leading ! is present, it is a 2822 * strict source route, otherwise it is 2823 * assmed to be a loose source route. 2824 * 2825 * We fill in the source route option as 2826 * hop1,hop2,hop3...dest 2827 * and return a pointer to hop1, which will 2828 * be the address to connect() to. 2829 * 2830 * Arguments: 2831 * 2832 * res: ponter to addrinfo structure which contains sockaddr to 2833 * the host to connect to. 2834 * 2835 * arg: pointer to route list to decipher 2836 * 2837 * cpp: If *cpp is not equal to NULL, this is a 2838 * pointer to a pointer to a character array 2839 * that should be filled in with the option. 2840 * 2841 * lenp: pointer to an integer that contains the 2842 * length of *cpp if *cpp != NULL. 2843 * 2844 * protop: pointer to an integer that should be filled in with 2845 * appropriate protocol for setsockopt, as socket 2846 * protocol family. 2847 * 2848 * optp: pointer to an integer that should be filled in with 2849 * appropriate option for setsockopt, as socket protocol 2850 * family. 2851 * 2852 * Return values: 2853 * 2854 * If the return value is 1, then all operations are 2855 * successful. If the 2856 * return value is -1, there was a syntax error in the 2857 * option, either unknown characters, or too many hosts. 2858 * If the return value is 0, one of the hostnames in the 2859 * path is unknown, and *cpp is set to point to the bad 2860 * hostname. 2861 * 2862 * *cpp: If *cpp was equal to NULL, it will be filled 2863 * in with a pointer to our static area that has 2864 * the option filled in. This will be 32bit aligned. 2865 * 2866 * *lenp: This will be filled in with how long the option 2867 * pointed to by *cpp is. 2868 * 2869 * *protop: This will be filled in with appropriate protocol for 2870 * setsockopt, as socket protocol family. 2871 * 2872 * *optp: This will be filled in with appropriate option for 2873 * setsockopt, as socket protocol family. 2874 */ 2875static int 2876sourceroute(struct addrinfo *ai, char *arg, char **cpp, int *lenp, int *protop, int *optp) 2877{ 2878 static char buf[1024 + ALIGNBYTES]; /*XXX*/ 2879 char *cp, *cp2, *lsrp, *ep; 2880 struct sockaddr_in *_sin; 2881#ifdef INET6 2882 struct sockaddr_in6 *sin6; 2883 struct cmsghdr *cmsg = NULL; 2884#endif 2885 struct addrinfo hints, *res; 2886 int error; 2887 char c; 2888 2889 /* 2890 * Verify the arguments, and make sure we have 2891 * at least 7 bytes for the option. 2892 */ 2893 if (cpp == NULL || lenp == NULL) 2894 return -1; 2895 if (*cpp != NULL) { 2896 switch (ai->ai_family) { 2897 case AF_INET: 2898 if (*lenp < 7) 2899 return -1; 2900 break; 2901#ifdef INET6 2902 case AF_INET6: 2903 if (*lenp < (int)CMSG_SPACE(sizeof(struct ip6_rthdr) + 2904 sizeof(struct in6_addr))) 2905 return -1; 2906 break; 2907#endif 2908 } 2909 } 2910 /* 2911 * Decide whether we have a buffer passed to us, 2912 * or if we need to use our own static buffer. 2913 */ 2914 if (*cpp) { 2915 lsrp = *cpp; 2916 ep = lsrp + *lenp; 2917 } else { 2918 *cpp = lsrp = (char *)ALIGN(buf); 2919 ep = lsrp + 1024; 2920 } 2921 2922 cp = arg; 2923 2924#ifdef INET6 2925 if (ai->ai_family == AF_INET6) { 2926 cmsg = inet6_rthdr_init(*cpp, IPV6_RTHDR_TYPE_0); 2927 if (*cp != '@') 2928 return -1; 2929 *protop = IPPROTO_IPV6; 2930 *optp = IPV6_PKTOPTIONS; 2931 } else 2932#endif 2933 { 2934 /* 2935 * Next, decide whether we have a loose source 2936 * route or a strict source route, and fill in 2937 * the begining of the option. 2938 */ 2939 if (*cp == '!') { 2940 cp++; 2941 *lsrp++ = IPOPT_SSRR; 2942 } else 2943 *lsrp++ = IPOPT_LSRR; 2944 2945 if (*cp != '@') 2946 return -1; 2947 2948 lsrp++; /* skip over length, we'll fill it in later */ 2949 *lsrp++ = 4; 2950 *protop = IPPROTO_IP; 2951 *optp = IP_OPTIONS; 2952 } 2953 2954 cp++; 2955 memset(&hints, 0, sizeof(hints)); 2956 hints.ai_family = ai->ai_family; 2957 hints.ai_socktype = SOCK_STREAM; 2958 for (c = 0;;) { 2959 if ( 2960#ifdef INET6 2961 ai->ai_family != AF_INET6 && 2962#endif 2963 c == ':') 2964 cp2 = 0; 2965 else for (cp2 = cp; (c = *cp2); cp2++) { 2966 if (c == ',') { 2967 *cp2++ = '\0'; 2968 if (*cp2 == '@') 2969 cp2++; 2970 } else if (c == '@') { 2971 *cp2++ = '\0'; 2972 } else if ( 2973#ifdef INET6 2974 ai->ai_family != AF_INET6 && 2975#endif 2976 c == ':') { 2977 *cp2++ = '\0'; 2978 } else 2979 continue; 2980 break; 2981 } 2982 if (!c) 2983 cp2 = 0; 2984 2985 hints.ai_flags = AI_NUMERICHOST; 2986 error = getaddrinfo(cp, NULL, &hints, &res); 2987#ifdef EAI_NODATA 2988 if ((error == EAI_NODATA) || (error == EAI_NONAME)) 2989#else 2990 if (error == EAI_NONAME) 2991#endif 2992 { 2993 hints.ai_flags = 0; 2994 error = getaddrinfo(cp, NULL, &hints, &res); 2995 } 2996 if (error != 0) { 2997 fprintf(stderr, "%s: %s\n", cp, gai_strerror(error)); 2998 if (error == EAI_SYSTEM) 2999 fprintf(stderr, "%s: %s\n", cp, 3000 strerror(errno)); 3001 *cpp = cp; 3002 return(0); 3003 } 3004#ifdef INET6 3005 if (res->ai_family == AF_INET6) { 3006 sin6 = (struct sockaddr_in6 *)res->ai_addr; 3007 inet6_rthdr_add(cmsg, &sin6->sin6_addr, 3008 IPV6_RTHDR_LOOSE); 3009 } else 3010#endif 3011 { 3012 _sin = (struct sockaddr_in *)res->ai_addr; 3013 memcpy(lsrp, (char *)&_sin->sin_addr, 4); 3014 lsrp += 4; 3015 } 3016 if (cp2) 3017 cp = cp2; 3018 else 3019 break; 3020 /* 3021 * Check to make sure there is space for next address 3022 */ 3023#ifdef INET6 3024 if (res->ai_family == AF_INET6) { 3025 if (((char *)CMSG_DATA(cmsg) + 3026 sizeof(struct ip6_rthdr) + 3027 ((inet6_rthdr_segments(cmsg) + 1) * 3028 sizeof(struct in6_addr))) > ep) 3029 return -1; 3030 } else 3031#endif 3032 if (lsrp + 4 > ep) 3033 return -1; 3034 freeaddrinfo(res); 3035 } 3036#ifdef INET6 3037 if (res->ai_family == AF_INET6) { 3038 inet6_rthdr_lasthop(cmsg, IPV6_RTHDR_LOOSE); 3039 *lenp = cmsg->cmsg_len; 3040 } else 3041#endif 3042 { 3043 if ((*(*cpp+IPOPT_OLEN) = lsrp - *cpp) <= 7) { 3044 *cpp = 0; 3045 *lenp = 0; 3046 return -1; 3047 } 3048 *lsrp++ = IPOPT_NOP; /* 32 bit word align it */ 3049 *lenp = lsrp - *cpp; 3050 } 3051 freeaddrinfo(res); 3052 return 1; 3053} 3054