1 /* 2 * Copyright (c) 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 */ 7 8 #ifndef lint 9 static char copyright[] = 10 "@(#) Copyright (c) 1989, 1993\n\ 11 The Regents of the University of California. All rights reserved.\n"; 12 #endif /* not lint */ 13 14 #ifndef lint 15 static char sccsid[] = "@(#)telnetd.c 8.3 (Berkeley) 02/16/95"; 16 #endif /* not lint */ 17 18 #include "telnetd.h" 19 #include "pathnames.h" 20 21 #if defined(_SC_CRAY_SECURE_SYS) && !defined(SCM_SECURITY) 22 /* 23 * UNICOS 6.0/6.1 do not have SCM_SECURITY defined, so we can 24 * use it to tell us to turn off all the socket security code, 25 * since that is only used in UNICOS 7.0 and later. 26 */ 27 # undef _SC_CRAY_SECURE_SYS 28 #endif 29 30 #if defined(_SC_CRAY_SECURE_SYS) 31 #include <sys/sysv.h> 32 #include <sys/secdev.h> 33 # ifdef SO_SEC_MULTI /* 8.0 code */ 34 #include <sys/secparm.h> 35 #include <sys/usrv.h> 36 # endif /* SO_SEC_MULTI */ 37 int secflag; 38 char tty_dev[16]; 39 struct secdev dv; 40 struct sysv sysv; 41 # ifdef SO_SEC_MULTI /* 8.0 code */ 42 struct socksec ss; 43 # else /* SO_SEC_MULTI */ /* 7.0 code */ 44 struct socket_security ss; 45 # endif /* SO_SEC_MULTI */ 46 #endif /* _SC_CRAY_SECURE_SYS */ 47 48 #if defined(AUTHENTICATION) 49 #include <libtelnet/auth.h> 50 int auth_level = 0; 51 #endif 52 #if defined(SecurID) 53 int require_SecurID = 0; 54 #endif 55 56 extern int utmp_len; 57 int registerd_host_only = 0; 58 59 #ifdef STREAMSPTY 60 # include <stropts.h> 61 # include <termio.h> 62 /* make sure we don't get the bsd version */ 63 # include "/usr/include/sys/tty.h" 64 # include <sys/ptyvar.h> 65 66 /* 67 * Because of the way ptyibuf is used with streams messages, we need 68 * ptyibuf+1 to be on a full-word boundary. The following wierdness 69 * is simply to make that happen. 70 */ 71 long ptyibufbuf[BUFSIZ/sizeof(long)+1]; 72 char *ptyibuf = ((char *)&ptyibufbuf[1])-1; 73 char *ptyip = ((char *)&ptyibufbuf[1])-1; 74 char ptyibuf2[BUFSIZ]; 75 unsigned char ctlbuf[BUFSIZ]; 76 struct strbuf strbufc, strbufd; 77 78 int readstream(); 79 80 #else /* ! STREAMPTY */ 81 82 /* 83 * I/O data buffers, 84 * pointers, and counters. 85 */ 86 char ptyibuf[BUFSIZ], *ptyip = ptyibuf; 87 char ptyibuf2[BUFSIZ]; 88 89 #endif /* ! STREAMPTY */ 90 91 int hostinfo = 1; /* do we print login banner? */ 92 93 #ifdef CRAY 94 extern int newmap; /* nonzero if \n maps to ^M^J */ 95 int lowpty = 0, highpty; /* low, high pty numbers */ 96 #endif /* CRAY */ 97 98 int debug = 0; 99 int keepalive = 1; 100 char *progname; 101 102 extern void usage P((void)); 103 104 /* 105 * The string to pass to getopt(). We do it this way so 106 * that only the actual options that we support will be 107 * passed off to getopt(). 108 */ 109 char valid_opts[] = { 110 'd', ':', 'h', 'k', 'n', 'S', ':', 'u', ':', 'U', 111 #ifdef AUTHENTICATION 112 'a', ':', 'X', ':', 113 #endif 114 #ifdef BFTPDAEMON 115 'B', 116 #endif 117 #ifdef DIAGNOSTICS 118 'D', ':', 119 #endif 120 #ifdef ENCRYPTION 121 'e', ':', 122 #endif 123 #if defined(CRAY) && defined(NEWINIT) 124 'I', ':', 125 #endif 126 #ifdef LINEMODE 127 'l', 128 #endif 129 #ifdef CRAY 130 'r', ':', 131 #endif 132 #ifdef SecurID 133 's', 134 #endif 135 '\0' 136 }; 137 138 main(argc, argv) 139 char *argv[]; 140 { 141 struct sockaddr_in from; 142 int on = 1, fromlen; 143 register int ch; 144 extern char *optarg; 145 extern int optind; 146 #if defined(IPPROTO_IP) && defined(IP_TOS) 147 int tos = -1; 148 #endif 149 150 pfrontp = pbackp = ptyobuf; 151 netip = netibuf; 152 nfrontp = nbackp = netobuf; 153 #ifdef ENCRYPTION 154 nclearto = 0; 155 #endif /* ENCRYPTION */ 156 157 progname = *argv; 158 159 #ifdef CRAY 160 /* 161 * Get number of pty's before trying to process options, 162 * which may include changing pty range. 163 */ 164 highpty = getnpty(); 165 #endif /* CRAY */ 166 167 while ((ch = getopt(argc, argv, valid_opts)) != EOF) { 168 switch(ch) { 169 170 #ifdef AUTHENTICATION 171 case 'a': 172 /* 173 * Check for required authentication level 174 */ 175 if (strcmp(optarg, "debug") == 0) { 176 extern int auth_debug_mode; 177 auth_debug_mode = 1; 178 } else if (strcasecmp(optarg, "none") == 0) { 179 auth_level = 0; 180 } else if (strcasecmp(optarg, "other") == 0) { 181 auth_level = AUTH_OTHER; 182 } else if (strcasecmp(optarg, "user") == 0) { 183 auth_level = AUTH_USER; 184 } else if (strcasecmp(optarg, "valid") == 0) { 185 auth_level = AUTH_VALID; 186 } else if (strcasecmp(optarg, "off") == 0) { 187 /* 188 * This hack turns off authentication 189 */ 190 auth_level = -1; 191 } else { 192 fprintf(stderr, 193 "telnetd: unknown authorization level for -a\n"); 194 } 195 break; 196 #endif /* AUTHENTICATION */ 197 198 #ifdef BFTPDAEMON 199 case 'B': 200 bftpd++; 201 break; 202 #endif /* BFTPDAEMON */ 203 204 case 'd': 205 if (strcmp(optarg, "ebug") == 0) { 206 debug++; 207 break; 208 } 209 usage(); 210 /* NOTREACHED */ 211 break; 212 213 #ifdef DIAGNOSTICS 214 case 'D': 215 /* 216 * Check for desired diagnostics capabilities. 217 */ 218 if (!strcmp(optarg, "report")) { 219 diagnostic |= TD_REPORT|TD_OPTIONS; 220 } else if (!strcmp(optarg, "exercise")) { 221 diagnostic |= TD_EXERCISE; 222 } else if (!strcmp(optarg, "netdata")) { 223 diagnostic |= TD_NETDATA; 224 } else if (!strcmp(optarg, "ptydata")) { 225 diagnostic |= TD_PTYDATA; 226 } else if (!strcmp(optarg, "options")) { 227 diagnostic |= TD_OPTIONS; 228 } else { 229 usage(); 230 /* NOT REACHED */ 231 } 232 break; 233 #endif /* DIAGNOSTICS */ 234 235 #ifdef ENCRYPTION 236 case 'e': 237 if (strcmp(optarg, "debug") == 0) { 238 extern int encrypt_debug_mode; 239 encrypt_debug_mode = 1; 240 break; 241 } 242 usage(); 243 /* NOTREACHED */ 244 break; 245 #endif /* ENCRYPTION */ 246 247 case 'h': 248 hostinfo = 0; 249 break; 250 251 #if defined(CRAY) && defined(NEWINIT) 252 case 'I': 253 { 254 extern char *gen_id; 255 gen_id = optarg; 256 break; 257 } 258 #endif /* defined(CRAY) && defined(NEWINIT) */ 259 260 #ifdef LINEMODE 261 case 'l': 262 alwayslinemode = 1; 263 break; 264 #endif /* LINEMODE */ 265 266 case 'k': 267 #if defined(LINEMODE) && defined(KLUDGELINEMODE) 268 lmodetype = NO_AUTOKLUDGE; 269 #else 270 /* ignore -k option if built without kludge linemode */ 271 #endif /* defined(LINEMODE) && defined(KLUDGELINEMODE) */ 272 break; 273 274 case 'n': 275 keepalive = 0; 276 break; 277 278 #ifdef CRAY 279 case 'r': 280 { 281 char *strchr(); 282 char *c; 283 284 /* 285 * Allow the specification of alterations 286 * to the pty search range. It is legal to 287 * specify only one, and not change the 288 * other from its default. 289 */ 290 c = strchr(optarg, '-'); 291 if (c) { 292 *c++ = '\0'; 293 highpty = atoi(c); 294 } 295 if (*optarg != '\0') 296 lowpty = atoi(optarg); 297 if ((lowpty > highpty) || (lowpty < 0) || 298 (highpty > 32767)) { 299 usage(); 300 /* NOT REACHED */ 301 } 302 break; 303 } 304 #endif /* CRAY */ 305 306 #ifdef SecurID 307 case 's': 308 /* SecurID required */ 309 require_SecurID = 1; 310 break; 311 #endif /* SecurID */ 312 case 'S': 313 #ifdef HAS_GETTOS 314 if ((tos = parsetos(optarg, "tcp")) < 0) 315 fprintf(stderr, "%s%s%s\n", 316 "telnetd: Bad TOS argument '", optarg, 317 "'; will try to use default TOS"); 318 #else 319 fprintf(stderr, "%s%s\n", "TOS option unavailable; ", 320 "-S flag not supported\n"); 321 #endif 322 break; 323 324 case 'u': 325 utmp_len = atoi(optarg); 326 break; 327 328 case 'U': 329 registerd_host_only = 1; 330 break; 331 332 #ifdef AUTHENTICATION 333 case 'X': 334 /* 335 * Check for invalid authentication types 336 */ 337 auth_disable_name(optarg); 338 break; 339 #endif /* AUTHENTICATION */ 340 341 default: 342 fprintf(stderr, "telnetd: %c: unknown option\n", ch); 343 /* FALLTHROUGH */ 344 case '?': 345 usage(); 346 /* NOTREACHED */ 347 } 348 } 349 350 argc -= optind; 351 argv += optind; 352 353 if (debug) { 354 int s, ns, foo; 355 struct servent *sp; 356 static struct sockaddr_in sin = { AF_INET }; 357 358 if (argc > 1) { 359 usage(); 360 /* NOT REACHED */ 361 } else if (argc == 1) { 362 if (sp = getservbyname(*argv, "tcp")) { 363 sin.sin_port = sp->s_port; 364 } else { 365 sin.sin_port = atoi(*argv); 366 if ((int)sin.sin_port <= 0) { 367 fprintf(stderr, "telnetd: %s: bad port #\n", *argv); 368 usage(); 369 /* NOT REACHED */ 370 } 371 sin.sin_port = htons((u_short)sin.sin_port); 372 } 373 } else { 374 sp = getservbyname("telnet", "tcp"); 375 if (sp == 0) { 376 fprintf(stderr, "telnetd: tcp/telnet: unknown service\n"); 377 exit(1); 378 } 379 sin.sin_port = sp->s_port; 380 } 381 382 s = socket(AF_INET, SOCK_STREAM, 0); 383 if (s < 0) { 384 perror("telnetd: socket");; 385 exit(1); 386 } 387 (void) setsockopt(s, SOL_SOCKET, SO_REUSEADDR, 388 (char *)&on, sizeof(on)); 389 if (bind(s, (struct sockaddr *)&sin, sizeof sin) < 0) { 390 perror("bind"); 391 exit(1); 392 } 393 if (listen(s, 1) < 0) { 394 perror("listen"); 395 exit(1); 396 } 397 foo = sizeof sin; 398 ns = accept(s, (struct sockaddr *)&sin, &foo); 399 if (ns < 0) { 400 perror("accept"); 401 exit(1); 402 } 403 (void) dup2(ns, 0); 404 (void) close(ns); 405 (void) close(s); 406 #ifdef convex 407 } else if (argc == 1) { 408 ; /* VOID*/ /* Just ignore the host/port name */ 409 #endif 410 } else if (argc > 0) { 411 usage(); 412 /* NOT REACHED */ 413 } 414 415 #if defined(_SC_CRAY_SECURE_SYS) 416 secflag = sysconf(_SC_CRAY_SECURE_SYS); 417 418 /* 419 * Get socket's security label 420 */ 421 if (secflag) { 422 int szss = sizeof(ss); 423 #ifdef SO_SEC_MULTI /* 8.0 code */ 424 int sock_multi; 425 int szi = sizeof(int); 426 #endif /* SO_SEC_MULTI */ 427 428 bzero((char *)&dv, sizeof(dv)); 429 430 if (getsysv(&sysv, sizeof(struct sysv)) != 0) { 431 perror("getsysv"); 432 exit(1); 433 } 434 435 /* 436 * Get socket security label and set device values 437 * {security label to be set on ttyp device} 438 */ 439 #ifdef SO_SEC_MULTI /* 8.0 code */ 440 if ((getsockopt(0, SOL_SOCKET, SO_SECURITY, 441 (char *)&ss, &szss) < 0) || 442 (getsockopt(0, SOL_SOCKET, SO_SEC_MULTI, 443 (char *)&sock_multi, &szi) < 0)) { 444 perror("getsockopt"); 445 exit(1); 446 } else { 447 dv.dv_actlvl = ss.ss_actlabel.lt_level; 448 dv.dv_actcmp = ss.ss_actlabel.lt_compart; 449 if (!sock_multi) { 450 dv.dv_minlvl = dv.dv_maxlvl = dv.dv_actlvl; 451 dv.dv_valcmp = dv.dv_actcmp; 452 } else { 453 dv.dv_minlvl = ss.ss_minlabel.lt_level; 454 dv.dv_maxlvl = ss.ss_maxlabel.lt_level; 455 dv.dv_valcmp = ss.ss_maxlabel.lt_compart; 456 } 457 dv.dv_devflg = 0; 458 } 459 #else /* SO_SEC_MULTI */ /* 7.0 code */ 460 if (getsockopt(0, SOL_SOCKET, SO_SECURITY, 461 (char *)&ss, &szss) >= 0) { 462 dv.dv_actlvl = ss.ss_slevel; 463 dv.dv_actcmp = ss.ss_compart; 464 dv.dv_minlvl = ss.ss_minlvl; 465 dv.dv_maxlvl = ss.ss_maxlvl; 466 dv.dv_valcmp = ss.ss_maxcmp; 467 } 468 #endif /* SO_SEC_MULTI */ 469 } 470 #endif /* _SC_CRAY_SECURE_SYS */ 471 472 openlog("telnetd", LOG_PID | LOG_ODELAY, LOG_DAEMON); 473 fromlen = sizeof (from); 474 if (getpeername(0, (struct sockaddr *)&from, &fromlen) < 0) { 475 fprintf(stderr, "%s: ", progname); 476 perror("getpeername"); 477 _exit(1); 478 } 479 if (keepalive && 480 setsockopt(0, SOL_SOCKET, SO_KEEPALIVE, 481 (char *)&on, sizeof (on)) < 0) { 482 syslog(LOG_WARNING, "setsockopt (SO_KEEPALIVE): %m"); 483 } 484 485 #if defined(IPPROTO_IP) && defined(IP_TOS) 486 { 487 # if defined(HAS_GETTOS) 488 struct tosent *tp; 489 if (tos < 0 && (tp = gettosbyname("telnet", "tcp"))) 490 tos = tp->t_tos; 491 # endif 492 if (tos < 0) 493 tos = 020; /* Low Delay bit */ 494 if (tos 495 && (setsockopt(0, IPPROTO_IP, IP_TOS, 496 (char *)&tos, sizeof(tos)) < 0) 497 && (errno != ENOPROTOOPT) ) 498 syslog(LOG_WARNING, "setsockopt (IP_TOS): %m"); 499 } 500 #endif /* defined(IPPROTO_IP) && defined(IP_TOS) */ 501 net = 0; 502 doit(&from); 503 /* NOTREACHED */ 504 } /* end of main */ 505 506 void 507 usage() 508 { 509 fprintf(stderr, "Usage: telnetd"); 510 #ifdef AUTHENTICATION 511 fprintf(stderr, " [-a (debug|other|user|valid|off|none)]\n\t"); 512 #endif 513 #ifdef BFTPDAEMON 514 fprintf(stderr, " [-B]"); 515 #endif 516 fprintf(stderr, " [-debug]"); 517 #ifdef DIAGNOSTICS 518 fprintf(stderr, " [-D (options|report|exercise|netdata|ptydata)]\n\t"); 519 #endif 520 #ifdef AUTHENTICATION 521 fprintf(stderr, " [-edebug]"); 522 #endif 523 fprintf(stderr, " [-h]"); 524 #if defined(CRAY) && defined(NEWINIT) 525 fprintf(stderr, " [-Iinitid]"); 526 #endif 527 #if defined(LINEMODE) && defined(KLUDGELINEMODE) 528 fprintf(stderr, " [-k]"); 529 #endif 530 #ifdef LINEMODE 531 fprintf(stderr, " [-l]"); 532 #endif 533 fprintf(stderr, " [-n]"); 534 #ifdef CRAY 535 fprintf(stderr, " [-r[lowpty]-[highpty]]"); 536 #endif 537 fprintf(stderr, "\n\t"); 538 #ifdef SecurID 539 fprintf(stderr, " [-s]"); 540 #endif 541 #ifdef HAS_GETTOS 542 fprintf(stderr, " [-S tos]"); 543 #endif 544 #ifdef AUTHENTICATION 545 fprintf(stderr, " [-X auth-type]"); 546 #endif 547 fprintf(stderr, " [-u utmp_hostname_length] [-U]"); 548 fprintf(stderr, " [port]\n"); 549 exit(1); 550 } 551 552 /* 553 * getterminaltype 554 * 555 * Ask the other end to send along its terminal type and speed. 556 * Output is the variable terminaltype filled in. 557 */ 558 static unsigned char ttytype_sbbuf[] = { 559 IAC, SB, TELOPT_TTYPE, TELQUAL_SEND, IAC, SE 560 }; 561 562 int 563 getterminaltype(name) 564 char *name; 565 { 566 int retval = -1; 567 void _gettermname(); 568 569 settimer(baseline); 570 #if defined(AUTHENTICATION) 571 /* 572 * Handle the Authentication option before we do anything else. 573 */ 574 send_do(TELOPT_AUTHENTICATION, 1); 575 while (his_will_wont_is_changing(TELOPT_AUTHENTICATION)) 576 ttloop(); 577 if (his_state_is_will(TELOPT_AUTHENTICATION)) { 578 retval = auth_wait(name); 579 } 580 #endif 581 582 #ifdef ENCRYPTION 583 send_will(TELOPT_ENCRYPT, 1); 584 #endif /* ENCRYPTION */ 585 send_do(TELOPT_TTYPE, 1); 586 send_do(TELOPT_TSPEED, 1); 587 send_do(TELOPT_XDISPLOC, 1); 588 send_do(TELOPT_NEW_ENVIRON, 1); 589 send_do(TELOPT_OLD_ENVIRON, 1); 590 while ( 591 #ifdef ENCRYPTION 592 his_do_dont_is_changing(TELOPT_ENCRYPT) || 593 #endif /* ENCRYPTION */ 594 his_will_wont_is_changing(TELOPT_TTYPE) || 595 his_will_wont_is_changing(TELOPT_TSPEED) || 596 his_will_wont_is_changing(TELOPT_XDISPLOC) || 597 his_will_wont_is_changing(TELOPT_NEW_ENVIRON) || 598 his_will_wont_is_changing(TELOPT_OLD_ENVIRON)) { 599 ttloop(); 600 } 601 #ifdef ENCRYPTION 602 /* 603 * Wait for the negotiation of what type of encryption we can 604 * send with. If autoencrypt is not set, this will just return. 605 */ 606 if (his_state_is_will(TELOPT_ENCRYPT)) { 607 encrypt_wait(); 608 } 609 #endif /* ENCRYPTION */ 610 if (his_state_is_will(TELOPT_TSPEED)) { 611 static unsigned char sb[] = 612 { IAC, SB, TELOPT_TSPEED, TELQUAL_SEND, IAC, SE }; 613 614 bcopy(sb, nfrontp, sizeof sb); 615 nfrontp += sizeof sb; 616 } 617 if (his_state_is_will(TELOPT_XDISPLOC)) { 618 static unsigned char sb[] = 619 { IAC, SB, TELOPT_XDISPLOC, TELQUAL_SEND, IAC, SE }; 620 621 bcopy(sb, nfrontp, sizeof sb); 622 nfrontp += sizeof sb; 623 } 624 if (his_state_is_will(TELOPT_NEW_ENVIRON)) { 625 static unsigned char sb[] = 626 { IAC, SB, TELOPT_NEW_ENVIRON, TELQUAL_SEND, IAC, SE }; 627 628 bcopy(sb, nfrontp, sizeof sb); 629 nfrontp += sizeof sb; 630 } 631 else if (his_state_is_will(TELOPT_OLD_ENVIRON)) { 632 static unsigned char sb[] = 633 { IAC, SB, TELOPT_OLD_ENVIRON, TELQUAL_SEND, IAC, SE }; 634 635 bcopy(sb, nfrontp, sizeof sb); 636 nfrontp += sizeof sb; 637 } 638 if (his_state_is_will(TELOPT_TTYPE)) { 639 640 bcopy(ttytype_sbbuf, nfrontp, sizeof ttytype_sbbuf); 641 nfrontp += sizeof ttytype_sbbuf; 642 } 643 if (his_state_is_will(TELOPT_TSPEED)) { 644 while (sequenceIs(tspeedsubopt, baseline)) 645 ttloop(); 646 } 647 if (his_state_is_will(TELOPT_XDISPLOC)) { 648 while (sequenceIs(xdisplocsubopt, baseline)) 649 ttloop(); 650 } 651 if (his_state_is_will(TELOPT_NEW_ENVIRON)) { 652 while (sequenceIs(environsubopt, baseline)) 653 ttloop(); 654 } 655 if (his_state_is_will(TELOPT_OLD_ENVIRON)) { 656 while (sequenceIs(oenvironsubopt, baseline)) 657 ttloop(); 658 } 659 if (his_state_is_will(TELOPT_TTYPE)) { 660 char first[256], last[256]; 661 662 while (sequenceIs(ttypesubopt, baseline)) 663 ttloop(); 664 665 /* 666 * If the other side has already disabled the option, then 667 * we have to just go with what we (might) have already gotten. 668 */ 669 if (his_state_is_will(TELOPT_TTYPE) && !terminaltypeok(terminaltype)) { 670 (void) strncpy(first, terminaltype, sizeof(first)); 671 for(;;) { 672 /* 673 * Save the unknown name, and request the next name. 674 */ 675 (void) strncpy(last, terminaltype, sizeof(last)); 676 _gettermname(); 677 if (terminaltypeok(terminaltype)) 678 break; 679 if ((strncmp(last, terminaltype, sizeof(last)) == 0) || 680 his_state_is_wont(TELOPT_TTYPE)) { 681 /* 682 * We've hit the end. If this is the same as 683 * the first name, just go with it. 684 */ 685 if (strncmp(first, terminaltype, sizeof(first)) == 0) 686 break; 687 /* 688 * Get the terminal name one more time, so that 689 * RFC1091 compliant telnets will cycle back to 690 * the start of the list. 691 */ 692 _gettermname(); 693 if (strncmp(first, terminaltype, sizeof(first)) != 0) 694 (void) strncpy(terminaltype, first, sizeof(first)); 695 break; 696 } 697 } 698 } 699 } 700 return(retval); 701 } /* end of getterminaltype */ 702 703 void 704 _gettermname() 705 { 706 /* 707 * If the client turned off the option, 708 * we can't send another request, so we 709 * just return. 710 */ 711 if (his_state_is_wont(TELOPT_TTYPE)) 712 return; 713 settimer(baseline); 714 bcopy(ttytype_sbbuf, nfrontp, sizeof ttytype_sbbuf); 715 nfrontp += sizeof ttytype_sbbuf; 716 while (sequenceIs(ttypesubopt, baseline)) 717 ttloop(); 718 } 719 720 int 721 terminaltypeok(s) 722 char *s; 723 { 724 char buf[1024]; 725 726 if (terminaltype == NULL) 727 return(1); 728 729 /* 730 * tgetent() will return 1 if the type is known, and 731 * 0 if it is not known. If it returns -1, it couldn't 732 * open the database. But if we can't open the database, 733 * it won't help to say we failed, because we won't be 734 * able to verify anything else. So, we treat -1 like 1. 735 */ 736 if (tgetent(buf, s) == 0) 737 return(0); 738 return(1); 739 } 740 741 #ifndef MAXHOSTNAMELEN 742 #define MAXHOSTNAMELEN 64 743 #endif /* MAXHOSTNAMELEN */ 744 745 char *hostname; 746 char host_name[MAXHOSTNAMELEN]; 747 char remote_host_name[MAXHOSTNAMELEN]; 748 749 #ifndef convex 750 extern void telnet P((int, int)); 751 #else 752 extern void telnet P((int, int, char *)); 753 #endif 754 755 /* 756 * Get a pty, scan input lines. 757 */ 758 doit(who) 759 struct sockaddr_in *who; 760 { 761 char *host, *inet_ntoa(); 762 int t; 763 struct hostent *hp; 764 int level; 765 int ptynum; 766 char user_name[256]; 767 768 /* 769 * Find an available pty to use. 770 */ 771 #ifndef convex 772 pty = getpty(&ptynum); 773 if (pty < 0) 774 fatal(net, "All network ports in use"); 775 #else 776 for (;;) { 777 char *lp; 778 extern char *line, *getpty(); 779 780 if ((lp = getpty()) == NULL) 781 fatal(net, "Out of ptys"); 782 783 if ((pty = open(lp, 2)) >= 0) { 784 strcpy(line,lp); 785 line[5] = 't'; 786 break; 787 } 788 } 789 #endif 790 791 #if defined(_SC_CRAY_SECURE_SYS) 792 /* 793 * set ttyp line security label 794 */ 795 if (secflag) { 796 char slave_dev[16]; 797 798 sprintf(tty_dev, "/dev/pty/%03d", ptynum); 799 if (setdevs(tty_dev, &dv) < 0) 800 fatal(net, "cannot set pty security"); 801 sprintf(slave_dev, "/dev/ttyp%03d", ptynum); 802 if (setdevs(slave_dev, &dv) < 0) 803 fatal(net, "cannot set tty security"); 804 } 805 #endif /* _SC_CRAY_SECURE_SYS */ 806 807 /* get name of connected client */ 808 hp = gethostbyaddr((char *)&who->sin_addr, sizeof (struct in_addr), 809 who->sin_family); 810 811 if (hp == NULL && registerd_host_only) { 812 fatal(net, "Couldn't resolve your address into a host name.\r\n\ 813 Please contact your net administrator"); 814 } else if (hp && 815 (strlen(hp->h_name) <= ((utmp_len < 0) ? -utmp_len : utmp_len))) { 816 host = hp->h_name; 817 } else { 818 host = inet_ntoa(who->sin_addr); 819 } 820 /* 821 * We must make a copy because Kerberos is probably going 822 * to also do a gethost* and overwrite the static data... 823 */ 824 strncpy(remote_host_name, host, sizeof(remote_host_name)-1); 825 remote_host_name[sizeof(remote_host_name)-1] = 0; 826 host = remote_host_name; 827 828 (void) gethostname(host_name, sizeof (host_name)); 829 hostname = host_name; 830 831 #if defined(AUTHENTICATION) || defined(ENCRYPTION) 832 auth_encrypt_init(hostname, host, "TELNETD", 1); 833 #endif 834 835 init_env(); 836 /* 837 * get terminal type. 838 */ 839 *user_name = 0; 840 level = getterminaltype(user_name); 841 setenv("TERM", terminaltype ? terminaltype : "network", 1); 842 843 /* 844 * Start up the login process on the slave side of the terminal 845 */ 846 #ifndef convex 847 startslave(host, level, user_name); 848 849 #if defined(_SC_CRAY_SECURE_SYS) 850 if (secflag) { 851 if (setulvl(dv.dv_actlvl) < 0) 852 fatal(net,"cannot setulvl()"); 853 if (setucmp(dv.dv_actcmp) < 0) 854 fatal(net, "cannot setucmp()"); 855 } 856 #endif /* _SC_CRAY_SECURE_SYS */ 857 858 telnet(net, pty); /* begin server processing */ 859 #else 860 telnet(net, pty, host); 861 #endif 862 /*NOTREACHED*/ 863 } /* end of doit */ 864 865 #if defined(CRAY2) && defined(UNICOS5) && defined(UNICOS50) 866 int 867 Xterm_output(ibufp, obuf, icountp, ocount) 868 char **ibufp, *obuf; 869 int *icountp, ocount; 870 { 871 int ret; 872 ret = term_output(*ibufp, obuf, *icountp, ocount); 873 *ibufp += *icountp; 874 *icountp = 0; 875 return(ret); 876 } 877 #define term_output Xterm_output 878 #endif /* defined(CRAY2) && defined(UNICOS5) && defined(UNICOS50) */ 879 880 /* 881 * Main loop. Select from pty and network, and 882 * hand data to telnet receiver finite state machine. 883 */ 884 void 885 #ifndef convex 886 telnet(f, p) 887 #else 888 telnet(f, p, host) 889 #endif 890 int f, p; 891 #ifdef convex 892 char *host; 893 #endif 894 { 895 int on = 1; 896 #define TABBUFSIZ 512 897 char defent[TABBUFSIZ]; 898 char defstrs[TABBUFSIZ]; 899 #undef TABBUFSIZ 900 char *HE; 901 char *HN; 902 char *IM; 903 void netflush(); 904 int nfd; 905 906 /* 907 * Initialize the slc mapping table. 908 */ 909 get_slc_defaults(); 910 911 /* 912 * Do some tests where it is desireable to wait for a response. 913 * Rather than doing them slowly, one at a time, do them all 914 * at once. 915 */ 916 if (my_state_is_wont(TELOPT_SGA)) 917 send_will(TELOPT_SGA, 1); 918 /* 919 * Is the client side a 4.2 (NOT 4.3) system? We need to know this 920 * because 4.2 clients are unable to deal with TCP urgent data. 921 * 922 * To find out, we send out a "DO ECHO". If the remote system 923 * answers "WILL ECHO" it is probably a 4.2 client, and we note 924 * that fact ("WILL ECHO" ==> that the client will echo what 925 * WE, the server, sends it; it does NOT mean that the client will 926 * echo the terminal input). 927 */ 928 send_do(TELOPT_ECHO, 1); 929 930 #ifdef LINEMODE 931 if (his_state_is_wont(TELOPT_LINEMODE)) { 932 /* Query the peer for linemode support by trying to negotiate 933 * the linemode option. 934 */ 935 linemode = 0; 936 editmode = 0; 937 send_do(TELOPT_LINEMODE, 1); /* send do linemode */ 938 } 939 #endif /* LINEMODE */ 940 941 /* 942 * Send along a couple of other options that we wish to negotiate. 943 */ 944 send_do(TELOPT_NAWS, 1); 945 send_will(TELOPT_STATUS, 1); 946 flowmode = 1; /* default flow control state */ 947 restartany = -1; /* uninitialized... */ 948 send_do(TELOPT_LFLOW, 1); 949 950 /* 951 * Spin, waiting for a response from the DO ECHO. However, 952 * some REALLY DUMB telnets out there might not respond 953 * to the DO ECHO. So, we spin looking for NAWS, (most dumb 954 * telnets so far seem to respond with WONT for a DO that 955 * they don't understand...) because by the time we get the 956 * response, it will already have processed the DO ECHO. 957 * Kludge upon kludge. 958 */ 959 while (his_will_wont_is_changing(TELOPT_NAWS)) 960 ttloop(); 961 962 /* 963 * But... 964 * The client might have sent a WILL NAWS as part of its 965 * startup code; if so, we'll be here before we get the 966 * response to the DO ECHO. We'll make the assumption 967 * that any implementation that understands about NAWS 968 * is a modern enough implementation that it will respond 969 * to our DO ECHO request; hence we'll do another spin 970 * waiting for the ECHO option to settle down, which is 971 * what we wanted to do in the first place... 972 */ 973 if (his_want_state_is_will(TELOPT_ECHO) && 974 his_state_is_will(TELOPT_NAWS)) { 975 while (his_will_wont_is_changing(TELOPT_ECHO)) 976 ttloop(); 977 } 978 /* 979 * On the off chance that the telnet client is broken and does not 980 * respond to the DO ECHO we sent, (after all, we did send the 981 * DO NAWS negotiation after the DO ECHO, and we won't get here 982 * until a response to the DO NAWS comes back) simulate the 983 * receipt of a will echo. This will also send a WONT ECHO 984 * to the client, since we assume that the client failed to 985 * respond because it believes that it is already in DO ECHO 986 * mode, which we do not want. 987 */ 988 if (his_want_state_is_will(TELOPT_ECHO)) { 989 DIAG(TD_OPTIONS, 990 {sprintf(nfrontp, "td: simulating recv\r\n"); 991 nfrontp += strlen(nfrontp);}); 992 willoption(TELOPT_ECHO); 993 } 994 995 /* 996 * Finally, to clean things up, we turn on our echo. This 997 * will break stupid 4.2 telnets out of local terminal echo. 998 */ 999 1000 if (my_state_is_wont(TELOPT_ECHO)) 1001 send_will(TELOPT_ECHO, 1); 1002 1003 #ifndef STREAMSPTY 1004 /* 1005 * Turn on packet mode 1006 */ 1007 (void) ioctl(p, TIOCPKT, (char *)&on); 1008 #endif 1009 1010 #if defined(LINEMODE) && defined(KLUDGELINEMODE) 1011 /* 1012 * Continuing line mode support. If client does not support 1013 * real linemode, attempt to negotiate kludge linemode by sending 1014 * the do timing mark sequence. 1015 */ 1016 if (lmodetype < REAL_LINEMODE) 1017 send_do(TELOPT_TM, 1); 1018 #endif /* defined(LINEMODE) && defined(KLUDGELINEMODE) */ 1019 1020 /* 1021 * Call telrcv() once to pick up anything received during 1022 * terminal type negotiation, 4.2/4.3 determination, and 1023 * linemode negotiation. 1024 */ 1025 telrcv(); 1026 1027 (void) ioctl(f, FIONBIO, (char *)&on); 1028 (void) ioctl(p, FIONBIO, (char *)&on); 1029 #if defined(CRAY2) && defined(UNICOS5) 1030 init_termdriver(f, p, interrupt, sendbrk); 1031 #endif 1032 1033 #if defined(SO_OOBINLINE) 1034 (void) setsockopt(net, SOL_SOCKET, SO_OOBINLINE, 1035 (char *)&on, sizeof on); 1036 #endif /* defined(SO_OOBINLINE) */ 1037 1038 #ifdef SIGTSTP 1039 (void) signal(SIGTSTP, SIG_IGN); 1040 #endif 1041 #ifdef SIGTTOU 1042 /* 1043 * Ignoring SIGTTOU keeps the kernel from blocking us 1044 * in ttioct() in /sys/tty.c. 1045 */ 1046 (void) signal(SIGTTOU, SIG_IGN); 1047 #endif 1048 1049 (void) signal(SIGCHLD, cleanup); 1050 1051 #if defined(CRAY2) && defined(UNICOS5) 1052 /* 1053 * Cray-2 will send a signal when pty modes are changed by slave 1054 * side. Set up signal handler now. 1055 */ 1056 if ((int)signal(SIGUSR1, termstat) < 0) 1057 perror("signal"); 1058 else if (ioctl(p, TCSIGME, (char *)SIGUSR1) < 0) 1059 perror("ioctl:TCSIGME"); 1060 /* 1061 * Make processing loop check terminal characteristics early on. 1062 */ 1063 termstat(); 1064 #endif 1065 1066 #ifdef TIOCNOTTY 1067 { 1068 register int t; 1069 t = open(_PATH_TTY, O_RDWR); 1070 if (t >= 0) { 1071 (void) ioctl(t, TIOCNOTTY, (char *)0); 1072 (void) close(t); 1073 } 1074 } 1075 #endif 1076 1077 #if defined(CRAY) && defined(NEWINIT) && defined(TIOCSCTTY) 1078 (void) setsid(); 1079 ioctl(p, TIOCSCTTY, 0); 1080 #endif 1081 1082 /* 1083 * Show banner that getty never gave. 1084 * 1085 * We put the banner in the pty input buffer. This way, it 1086 * gets carriage return null processing, etc., just like all 1087 * other pty --> client data. 1088 */ 1089 1090 #if !defined(CRAY) || !defined(NEWINIT) 1091 if (getenv("USER")) 1092 hostinfo = 0; 1093 #endif 1094 1095 if (getent(defent, "default") == 1) { 1096 char *getstr(); 1097 char *cp=defstrs; 1098 1099 HE = getstr("he", &cp); 1100 HN = getstr("hn", &cp); 1101 IM = getstr("im", &cp); 1102 if (HN && *HN) 1103 (void) strcpy(host_name, HN); 1104 if (IM == 0) 1105 IM = ""; 1106 } else { 1107 IM = DEFAULT_IM; 1108 HE = 0; 1109 } 1110 edithost(HE, host_name); 1111 if (hostinfo && *IM) 1112 putf(IM, ptyibuf2); 1113 1114 if (pcc) 1115 (void) strncat(ptyibuf2, ptyip, pcc+1); 1116 ptyip = ptyibuf2; 1117 pcc = strlen(ptyip); 1118 #ifdef LINEMODE 1119 /* 1120 * Last check to make sure all our states are correct. 1121 */ 1122 init_termbuf(); 1123 localstat(); 1124 #endif /* LINEMODE */ 1125 1126 DIAG(TD_REPORT, 1127 {sprintf(nfrontp, "td: Entering processing loop\r\n"); 1128 nfrontp += strlen(nfrontp);}); 1129 1130 #ifdef convex 1131 startslave(host); 1132 #endif 1133 1134 nfd = ((f > p) ? f : p) + 1; 1135 for (;;) { 1136 fd_set ibits, obits, xbits; 1137 register int c; 1138 1139 if (ncc < 0 && pcc < 0) 1140 break; 1141 1142 #if defined(CRAY2) && defined(UNICOS5) 1143 if (needtermstat) 1144 _termstat(); 1145 #endif /* defined(CRAY2) && defined(UNICOS5) */ 1146 FD_ZERO(&ibits); 1147 FD_ZERO(&obits); 1148 FD_ZERO(&xbits); 1149 /* 1150 * Never look for input if there's still 1151 * stuff in the corresponding output buffer 1152 */ 1153 if (nfrontp - nbackp || pcc > 0) { 1154 FD_SET(f, &obits); 1155 } else { 1156 FD_SET(p, &ibits); 1157 } 1158 if (pfrontp - pbackp || ncc > 0) { 1159 FD_SET(p, &obits); 1160 } else { 1161 FD_SET(f, &ibits); 1162 } 1163 if (!SYNCHing) { 1164 FD_SET(f, &xbits); 1165 } 1166 if ((c = select(nfd, &ibits, &obits, &xbits, 1167 (struct timeval *)0)) < 1) { 1168 if (c == -1) { 1169 if (errno == EINTR) { 1170 continue; 1171 } 1172 } 1173 sleep(5); 1174 continue; 1175 } 1176 1177 /* 1178 * Any urgent data? 1179 */ 1180 if (FD_ISSET(net, &xbits)) { 1181 SYNCHing = 1; 1182 } 1183 1184 /* 1185 * Something to read from the network... 1186 */ 1187 if (FD_ISSET(net, &ibits)) { 1188 #if !defined(SO_OOBINLINE) 1189 /* 1190 * In 4.2 (and 4.3 beta) systems, the 1191 * OOB indication and data handling in the kernel 1192 * is such that if two separate TCP Urgent requests 1193 * come in, one byte of TCP data will be overlaid. 1194 * This is fatal for Telnet, but we try to live 1195 * with it. 1196 * 1197 * In addition, in 4.2 (and...), a special protocol 1198 * is needed to pick up the TCP Urgent data in 1199 * the correct sequence. 1200 * 1201 * What we do is: if we think we are in urgent 1202 * mode, we look to see if we are "at the mark". 1203 * If we are, we do an OOB receive. If we run 1204 * this twice, we will do the OOB receive twice, 1205 * but the second will fail, since the second 1206 * time we were "at the mark", but there wasn't 1207 * any data there (the kernel doesn't reset 1208 * "at the mark" until we do a normal read). 1209 * Once we've read the OOB data, we go ahead 1210 * and do normal reads. 1211 * 1212 * There is also another problem, which is that 1213 * since the OOB byte we read doesn't put us 1214 * out of OOB state, and since that byte is most 1215 * likely the TELNET DM (data mark), we would 1216 * stay in the TELNET SYNCH (SYNCHing) state. 1217 * So, clocks to the rescue. If we've "just" 1218 * received a DM, then we test for the 1219 * presence of OOB data when the receive OOB 1220 * fails (and AFTER we did the normal mode read 1221 * to clear "at the mark"). 1222 */ 1223 if (SYNCHing) { 1224 int atmark; 1225 1226 (void) ioctl(net, SIOCATMARK, (char *)&atmark); 1227 if (atmark) { 1228 ncc = recv(net, netibuf, sizeof (netibuf), MSG_OOB); 1229 if ((ncc == -1) && (errno == EINVAL)) { 1230 ncc = read(net, netibuf, sizeof (netibuf)); 1231 if (sequenceIs(didnetreceive, gotDM)) { 1232 SYNCHing = stilloob(net); 1233 } 1234 } 1235 } else { 1236 ncc = read(net, netibuf, sizeof (netibuf)); 1237 } 1238 } else { 1239 ncc = read(net, netibuf, sizeof (netibuf)); 1240 } 1241 settimer(didnetreceive); 1242 #else /* !defined(SO_OOBINLINE)) */ 1243 ncc = read(net, netibuf, sizeof (netibuf)); 1244 #endif /* !defined(SO_OOBINLINE)) */ 1245 if (ncc < 0 && errno == EWOULDBLOCK) 1246 ncc = 0; 1247 else { 1248 if (ncc <= 0) { 1249 break; 1250 } 1251 netip = netibuf; 1252 } 1253 DIAG((TD_REPORT | TD_NETDATA), 1254 {sprintf(nfrontp, "td: netread %d chars\r\n", ncc); 1255 nfrontp += strlen(nfrontp);}); 1256 DIAG(TD_NETDATA, printdata("nd", netip, ncc)); 1257 } 1258 1259 /* 1260 * Something to read from the pty... 1261 */ 1262 if (FD_ISSET(p, &ibits)) { 1263 #ifndef STREAMSPTY 1264 pcc = read(p, ptyibuf, BUFSIZ); 1265 #else 1266 pcc = readstream(p, ptyibuf, BUFSIZ); 1267 #endif 1268 /* 1269 * On some systems, if we try to read something 1270 * off the master side before the slave side is 1271 * opened, we get EIO. 1272 */ 1273 if (pcc < 0 && (errno == EWOULDBLOCK || 1274 #ifdef EAGAIN 1275 errno == EAGAIN || 1276 #endif 1277 errno == EIO)) { 1278 pcc = 0; 1279 } else { 1280 if (pcc <= 0) 1281 break; 1282 #if !defined(CRAY2) || !defined(UNICOS5) 1283 #ifdef LINEMODE 1284 /* 1285 * If ioctl from pty, pass it through net 1286 */ 1287 if (ptyibuf[0] & TIOCPKT_IOCTL) { 1288 copy_termbuf(ptyibuf+1, pcc-1); 1289 localstat(); 1290 pcc = 1; 1291 } 1292 #endif /* LINEMODE */ 1293 if (ptyibuf[0] & TIOCPKT_FLUSHWRITE) { 1294 netclear(); /* clear buffer back */ 1295 #ifndef NO_URGENT 1296 /* 1297 * There are client telnets on some 1298 * operating systems get screwed up 1299 * royally if we send them urgent 1300 * mode data. 1301 */ 1302 *nfrontp++ = IAC; 1303 *nfrontp++ = DM; 1304 neturg = nfrontp-1; /* off by one XXX */ 1305 #endif 1306 } 1307 if (his_state_is_will(TELOPT_LFLOW) && 1308 (ptyibuf[0] & 1309 (TIOCPKT_NOSTOP|TIOCPKT_DOSTOP))) { 1310 int newflow = 1311 ptyibuf[0] & TIOCPKT_DOSTOP ? 1 : 0; 1312 if (newflow != flowmode) { 1313 flowmode = newflow; 1314 (void) sprintf(nfrontp, 1315 "%c%c%c%c%c%c", 1316 IAC, SB, TELOPT_LFLOW, 1317 flowmode ? LFLOW_ON 1318 : LFLOW_OFF, 1319 IAC, SE); 1320 nfrontp += 6; 1321 } 1322 } 1323 pcc--; 1324 ptyip = ptyibuf+1; 1325 #else /* defined(CRAY2) && defined(UNICOS5) */ 1326 if (!uselinemode) { 1327 unpcc = pcc; 1328 unptyip = ptyibuf; 1329 pcc = term_output(&unptyip, ptyibuf2, 1330 &unpcc, BUFSIZ); 1331 ptyip = ptyibuf2; 1332 } else 1333 ptyip = ptyibuf; 1334 #endif /* defined(CRAY2) && defined(UNICOS5) */ 1335 } 1336 } 1337 1338 while (pcc > 0) { 1339 if ((&netobuf[BUFSIZ] - nfrontp) < 2) 1340 break; 1341 c = *ptyip++ & 0377, pcc--; 1342 if (c == IAC) 1343 *nfrontp++ = c; 1344 #if defined(CRAY2) && defined(UNICOS5) 1345 else if (c == '\n' && 1346 my_state_is_wont(TELOPT_BINARY) && newmap) 1347 *nfrontp++ = '\r'; 1348 #endif /* defined(CRAY2) && defined(UNICOS5) */ 1349 *nfrontp++ = c; 1350 if ((c == '\r') && (my_state_is_wont(TELOPT_BINARY))) { 1351 if (pcc > 0 && ((*ptyip & 0377) == '\n')) { 1352 *nfrontp++ = *ptyip++ & 0377; 1353 pcc--; 1354 } else 1355 *nfrontp++ = '\0'; 1356 } 1357 } 1358 #if defined(CRAY2) && defined(UNICOS5) 1359 /* 1360 * If chars were left over from the terminal driver, 1361 * note their existence. 1362 */ 1363 if (!uselinemode && unpcc) { 1364 pcc = unpcc; 1365 unpcc = 0; 1366 ptyip = unptyip; 1367 } 1368 #endif /* defined(CRAY2) && defined(UNICOS5) */ 1369 1370 if (FD_ISSET(f, &obits) && (nfrontp - nbackp) > 0) 1371 netflush(); 1372 if (ncc > 0) 1373 telrcv(); 1374 if (FD_ISSET(p, &obits) && (pfrontp - pbackp) > 0) 1375 ptyflush(); 1376 } 1377 cleanup(0); 1378 } /* end of telnet */ 1379 1380 #ifndef TCSIG 1381 # ifdef TIOCSIG 1382 # define TCSIG TIOCSIG 1383 # endif 1384 #endif 1385 1386 #ifdef STREAMSPTY 1387 1388 int flowison = -1; /* current state of flow: -1 is unknown */ 1389 1390 int readstream(p, ibuf, bufsize) 1391 int p; 1392 char *ibuf; 1393 int bufsize; 1394 { 1395 int flags = 0; 1396 int ret = 0; 1397 struct termios *tsp; 1398 struct termio *tp; 1399 struct iocblk *ip; 1400 char vstop, vstart; 1401 int ixon; 1402 int newflow; 1403 1404 strbufc.maxlen = BUFSIZ; 1405 strbufc.buf = (char *)ctlbuf; 1406 strbufd.maxlen = bufsize-1; 1407 strbufd.len = 0; 1408 strbufd.buf = ibuf+1; 1409 ibuf[0] = 0; 1410 1411 ret = getmsg(p, &strbufc, &strbufd, &flags); 1412 if (ret < 0) /* error of some sort -- probably EAGAIN */ 1413 return(-1); 1414 1415 if (strbufc.len <= 0 || ctlbuf[0] == M_DATA) { 1416 /* data message */ 1417 if (strbufd.len > 0) { /* real data */ 1418 return(strbufd.len + 1); /* count header char */ 1419 } else { 1420 /* nothing there */ 1421 errno = EAGAIN; 1422 return(-1); 1423 } 1424 } 1425 1426 /* 1427 * It's a control message. Return 1, to look at the flag we set 1428 */ 1429 1430 switch (ctlbuf[0]) { 1431 case M_FLUSH: 1432 if (ibuf[1] & FLUSHW) 1433 ibuf[0] = TIOCPKT_FLUSHWRITE; 1434 return(1); 1435 1436 case M_IOCTL: 1437 ip = (struct iocblk *) (ibuf+1); 1438 1439 switch (ip->ioc_cmd) { 1440 case TCSETS: 1441 case TCSETSW: 1442 case TCSETSF: 1443 tsp = (struct termios *) 1444 (ibuf+1 + sizeof(struct iocblk)); 1445 vstop = tsp->c_cc[VSTOP]; 1446 vstart = tsp->c_cc[VSTART]; 1447 ixon = tsp->c_iflag & IXON; 1448 break; 1449 case TCSETA: 1450 case TCSETAW: 1451 case TCSETAF: 1452 tp = (struct termio *) (ibuf+1 + sizeof(struct iocblk)); 1453 vstop = tp->c_cc[VSTOP]; 1454 vstart = tp->c_cc[VSTART]; 1455 ixon = tp->c_iflag & IXON; 1456 break; 1457 default: 1458 errno = EAGAIN; 1459 return(-1); 1460 } 1461 1462 newflow = (ixon && (vstart == 021) && (vstop == 023)) ? 1 : 0; 1463 if (newflow != flowison) { /* it's a change */ 1464 flowison = newflow; 1465 ibuf[0] = newflow ? TIOCPKT_DOSTOP : TIOCPKT_NOSTOP; 1466 return(1); 1467 } 1468 } 1469 1470 /* nothing worth doing anything about */ 1471 errno = EAGAIN; 1472 return(-1); 1473 } 1474 #endif /* STREAMSPTY */ 1475 1476 /* 1477 * Send interrupt to process on other side of pty. 1478 * If it is in raw mode, just write NULL; 1479 * otherwise, write intr char. 1480 */ 1481 void 1482 interrupt() 1483 { 1484 ptyflush(); /* half-hearted */ 1485 1486 #if defined(STREAMSPTY) && defined(TIOCSIGNAL) 1487 /* Streams PTY style ioctl to post a signal */ 1488 { 1489 int sig = SIGINT; 1490 (void) ioctl(pty, TIOCSIGNAL, &sig); 1491 (void) ioctl(pty, I_FLUSH, FLUSHR); 1492 } 1493 #else 1494 #ifdef TCSIG 1495 (void) ioctl(pty, TCSIG, (char *)SIGINT); 1496 #else /* TCSIG */ 1497 init_termbuf(); 1498 *pfrontp++ = slctab[SLC_IP].sptr ? 1499 (unsigned char)*slctab[SLC_IP].sptr : '\177'; 1500 #endif /* TCSIG */ 1501 #endif 1502 } 1503 1504 /* 1505 * Send quit to process on other side of pty. 1506 * If it is in raw mode, just write NULL; 1507 * otherwise, write quit char. 1508 */ 1509 void 1510 sendbrk() 1511 { 1512 ptyflush(); /* half-hearted */ 1513 #ifdef TCSIG 1514 (void) ioctl(pty, TCSIG, (char *)SIGQUIT); 1515 #else /* TCSIG */ 1516 init_termbuf(); 1517 *pfrontp++ = slctab[SLC_ABORT].sptr ? 1518 (unsigned char)*slctab[SLC_ABORT].sptr : '\034'; 1519 #endif /* TCSIG */ 1520 } 1521 1522 void 1523 sendsusp() 1524 { 1525 #ifdef SIGTSTP 1526 ptyflush(); /* half-hearted */ 1527 # ifdef TCSIG 1528 (void) ioctl(pty, TCSIG, (char *)SIGTSTP); 1529 # else /* TCSIG */ 1530 *pfrontp++ = slctab[SLC_SUSP].sptr ? 1531 (unsigned char)*slctab[SLC_SUSP].sptr : '\032'; 1532 # endif /* TCSIG */ 1533 #endif /* SIGTSTP */ 1534 } 1535 1536 /* 1537 * When we get an AYT, if ^T is enabled, use that. Otherwise, 1538 * just send back "[Yes]". 1539 */ 1540 void 1541 recv_ayt() 1542 { 1543 #if defined(SIGINFO) && defined(TCSIG) 1544 if (slctab[SLC_AYT].sptr && *slctab[SLC_AYT].sptr != _POSIX_VDISABLE) { 1545 (void) ioctl(pty, TCSIG, (char *)SIGINFO); 1546 return; 1547 } 1548 #endif 1549 (void) strcpy(nfrontp, "\r\n[Yes]\r\n"); 1550 nfrontp += 9; 1551 } 1552 1553 void 1554 doeof() 1555 { 1556 init_termbuf(); 1557 1558 #if defined(LINEMODE) && defined(USE_TERMIO) && (VEOF == VMIN) 1559 if (!tty_isediting()) { 1560 extern char oldeofc; 1561 *pfrontp++ = oldeofc; 1562 return; 1563 } 1564 #endif 1565 *pfrontp++ = slctab[SLC_EOF].sptr ? 1566 (unsigned char)*slctab[SLC_EOF].sptr : '\004'; 1567 } 1568