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 8.2 (Berkeley) 12/15/93"; 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(); 904 905 /* 906 * Initialize the slc mapping table. 907 */ 908 get_slc_defaults(); 909 910 /* 911 * Do some tests where it is desireable to wait for a response. 912 * Rather than doing them slowly, one at a time, do them all 913 * at once. 914 */ 915 if (my_state_is_wont(TELOPT_SGA)) 916 send_will(TELOPT_SGA, 1); 917 /* 918 * Is the client side a 4.2 (NOT 4.3) system? We need to know this 919 * because 4.2 clients are unable to deal with TCP urgent data. 920 * 921 * To find out, we send out a "DO ECHO". If the remote system 922 * answers "WILL ECHO" it is probably a 4.2 client, and we note 923 * that fact ("WILL ECHO" ==> that the client will echo what 924 * WE, the server, sends it; it does NOT mean that the client will 925 * echo the terminal input). 926 */ 927 send_do(TELOPT_ECHO, 1); 928 929 #ifdef LINEMODE 930 if (his_state_is_wont(TELOPT_LINEMODE)) { 931 /* Query the peer for linemode support by trying to negotiate 932 * the linemode option. 933 */ 934 linemode = 0; 935 editmode = 0; 936 send_do(TELOPT_LINEMODE, 1); /* send do linemode */ 937 } 938 #endif /* LINEMODE */ 939 940 /* 941 * Send along a couple of other options that we wish to negotiate. 942 */ 943 send_do(TELOPT_NAWS, 1); 944 send_will(TELOPT_STATUS, 1); 945 flowmode = 1; /* default flow control state */ 946 restartany = -1; /* uninitialized... */ 947 send_do(TELOPT_LFLOW, 1); 948 949 /* 950 * Spin, waiting for a response from the DO ECHO. However, 951 * some REALLY DUMB telnets out there might not respond 952 * to the DO ECHO. So, we spin looking for NAWS, (most dumb 953 * telnets so far seem to respond with WONT for a DO that 954 * they don't understand...) because by the time we get the 955 * response, it will already have processed the DO ECHO. 956 * Kludge upon kludge. 957 */ 958 while (his_will_wont_is_changing(TELOPT_NAWS)) 959 ttloop(); 960 961 /* 962 * But... 963 * The client might have sent a WILL NAWS as part of its 964 * startup code; if so, we'll be here before we get the 965 * response to the DO ECHO. We'll make the assumption 966 * that any implementation that understands about NAWS 967 * is a modern enough implementation that it will respond 968 * to our DO ECHO request; hence we'll do another spin 969 * waiting for the ECHO option to settle down, which is 970 * what we wanted to do in the first place... 971 */ 972 if (his_want_state_is_will(TELOPT_ECHO) && 973 his_state_is_will(TELOPT_NAWS)) { 974 while (his_will_wont_is_changing(TELOPT_ECHO)) 975 ttloop(); 976 } 977 /* 978 * On the off chance that the telnet client is broken and does not 979 * respond to the DO ECHO we sent, (after all, we did send the 980 * DO NAWS negotiation after the DO ECHO, and we won't get here 981 * until a response to the DO NAWS comes back) simulate the 982 * receipt of a will echo. This will also send a WONT ECHO 983 * to the client, since we assume that the client failed to 984 * respond because it believes that it is already in DO ECHO 985 * mode, which we do not want. 986 */ 987 if (his_want_state_is_will(TELOPT_ECHO)) { 988 DIAG(TD_OPTIONS, 989 {sprintf(nfrontp, "td: simulating recv\r\n"); 990 nfrontp += strlen(nfrontp);}); 991 willoption(TELOPT_ECHO); 992 } 993 994 /* 995 * Finally, to clean things up, we turn on our echo. This 996 * will break stupid 4.2 telnets out of local terminal echo. 997 */ 998 999 if (my_state_is_wont(TELOPT_ECHO)) 1000 send_will(TELOPT_ECHO, 1); 1001 1002 #ifndef STREAMSPTY 1003 /* 1004 * Turn on packet mode 1005 */ 1006 (void) ioctl(p, TIOCPKT, (char *)&on); 1007 #endif 1008 1009 #if defined(LINEMODE) && defined(KLUDGELINEMODE) 1010 /* 1011 * Continuing line mode support. If client does not support 1012 * real linemode, attempt to negotiate kludge linemode by sending 1013 * the do timing mark sequence. 1014 */ 1015 if (lmodetype < REAL_LINEMODE) 1016 send_do(TELOPT_TM, 1); 1017 #endif /* defined(LINEMODE) && defined(KLUDGELINEMODE) */ 1018 1019 /* 1020 * Call telrcv() once to pick up anything received during 1021 * terminal type negotiation, 4.2/4.3 determination, and 1022 * linemode negotiation. 1023 */ 1024 telrcv(); 1025 1026 (void) ioctl(f, FIONBIO, (char *)&on); 1027 (void) ioctl(p, FIONBIO, (char *)&on); 1028 #if defined(CRAY2) && defined(UNICOS5) 1029 init_termdriver(f, p, interrupt, sendbrk); 1030 #endif 1031 1032 #if defined(SO_OOBINLINE) 1033 (void) setsockopt(net, SOL_SOCKET, SO_OOBINLINE, 1034 (char *)&on, sizeof on); 1035 #endif /* defined(SO_OOBINLINE) */ 1036 1037 #ifdef SIGTSTP 1038 (void) signal(SIGTSTP, SIG_IGN); 1039 #endif 1040 #ifdef SIGTTOU 1041 /* 1042 * Ignoring SIGTTOU keeps the kernel from blocking us 1043 * in ttioct() in /sys/tty.c. 1044 */ 1045 (void) signal(SIGTTOU, SIG_IGN); 1046 #endif 1047 1048 (void) signal(SIGCHLD, cleanup); 1049 1050 #if defined(CRAY2) && defined(UNICOS5) 1051 /* 1052 * Cray-2 will send a signal when pty modes are changed by slave 1053 * side. Set up signal handler now. 1054 */ 1055 if ((int)signal(SIGUSR1, termstat) < 0) 1056 perror("signal"); 1057 else if (ioctl(p, TCSIGME, (char *)SIGUSR1) < 0) 1058 perror("ioctl:TCSIGME"); 1059 /* 1060 * Make processing loop check terminal characteristics early on. 1061 */ 1062 termstat(); 1063 #endif 1064 1065 #ifdef TIOCNOTTY 1066 { 1067 register int t; 1068 t = open(_PATH_TTY, O_RDWR); 1069 if (t >= 0) { 1070 (void) ioctl(t, TIOCNOTTY, (char *)0); 1071 (void) close(t); 1072 } 1073 } 1074 #endif 1075 1076 #if defined(CRAY) && defined(NEWINIT) && defined(TIOCSCTTY) 1077 (void) setsid(); 1078 ioctl(p, TIOCSCTTY, 0); 1079 #endif 1080 1081 /* 1082 * Show banner that getty never gave. 1083 * 1084 * We put the banner in the pty input buffer. This way, it 1085 * gets carriage return null processing, etc., just like all 1086 * other pty --> client data. 1087 */ 1088 1089 #if !defined(CRAY) || !defined(NEWINIT) 1090 if (getenv("USER")) 1091 hostinfo = 0; 1092 #endif 1093 1094 if (getent(defent, "default") == 1) { 1095 char *getstr(); 1096 char *cp=defstrs; 1097 1098 HE = getstr("he", &cp); 1099 HN = getstr("hn", &cp); 1100 IM = getstr("im", &cp); 1101 if (HN && *HN) 1102 (void) strcpy(host_name, HN); 1103 if (IM == 0) 1104 IM = ""; 1105 } else { 1106 IM = DEFAULT_IM; 1107 HE = 0; 1108 } 1109 edithost(HE, host_name); 1110 if (hostinfo && *IM) 1111 putf(IM, ptyibuf2); 1112 1113 if (pcc) 1114 (void) strncat(ptyibuf2, ptyip, pcc+1); 1115 ptyip = ptyibuf2; 1116 pcc = strlen(ptyip); 1117 #ifdef LINEMODE 1118 /* 1119 * Last check to make sure all our states are correct. 1120 */ 1121 init_termbuf(); 1122 localstat(); 1123 #endif /* LINEMODE */ 1124 1125 DIAG(TD_REPORT, 1126 {sprintf(nfrontp, "td: Entering processing loop\r\n"); 1127 nfrontp += strlen(nfrontp);}); 1128 1129 #ifdef convex 1130 startslave(host); 1131 #endif 1132 1133 for (;;) { 1134 fd_set ibits, obits, xbits; 1135 register int c; 1136 1137 if (ncc < 0 && pcc < 0) 1138 break; 1139 1140 #if defined(CRAY2) && defined(UNICOS5) 1141 if (needtermstat) 1142 _termstat(); 1143 #endif /* defined(CRAY2) && defined(UNICOS5) */ 1144 FD_ZERO(&ibits); 1145 FD_ZERO(&obits); 1146 FD_ZERO(&xbits); 1147 /* 1148 * Never look for input if there's still 1149 * stuff in the corresponding output buffer 1150 */ 1151 if (nfrontp - nbackp || pcc > 0) { 1152 FD_SET(f, &obits); 1153 } else { 1154 FD_SET(p, &ibits); 1155 } 1156 if (pfrontp - pbackp || ncc > 0) { 1157 FD_SET(p, &obits); 1158 } else { 1159 FD_SET(f, &ibits); 1160 } 1161 if (!SYNCHing) { 1162 FD_SET(f, &xbits); 1163 } 1164 if ((c = select(16, &ibits, &obits, &xbits, 1165 (struct timeval *)0)) < 1) { 1166 if (c == -1) { 1167 if (errno == EINTR) { 1168 continue; 1169 } 1170 } 1171 sleep(5); 1172 continue; 1173 } 1174 1175 /* 1176 * Any urgent data? 1177 */ 1178 if (FD_ISSET(net, &xbits)) { 1179 SYNCHing = 1; 1180 } 1181 1182 /* 1183 * Something to read from the network... 1184 */ 1185 if (FD_ISSET(net, &ibits)) { 1186 #if !defined(SO_OOBINLINE) 1187 /* 1188 * In 4.2 (and 4.3 beta) systems, the 1189 * OOB indication and data handling in the kernel 1190 * is such that if two separate TCP Urgent requests 1191 * come in, one byte of TCP data will be overlaid. 1192 * This is fatal for Telnet, but we try to live 1193 * with it. 1194 * 1195 * In addition, in 4.2 (and...), a special protocol 1196 * is needed to pick up the TCP Urgent data in 1197 * the correct sequence. 1198 * 1199 * What we do is: if we think we are in urgent 1200 * mode, we look to see if we are "at the mark". 1201 * If we are, we do an OOB receive. If we run 1202 * this twice, we will do the OOB receive twice, 1203 * but the second will fail, since the second 1204 * time we were "at the mark", but there wasn't 1205 * any data there (the kernel doesn't reset 1206 * "at the mark" until we do a normal read). 1207 * Once we've read the OOB data, we go ahead 1208 * and do normal reads. 1209 * 1210 * There is also another problem, which is that 1211 * since the OOB byte we read doesn't put us 1212 * out of OOB state, and since that byte is most 1213 * likely the TELNET DM (data mark), we would 1214 * stay in the TELNET SYNCH (SYNCHing) state. 1215 * So, clocks to the rescue. If we've "just" 1216 * received a DM, then we test for the 1217 * presence of OOB data when the receive OOB 1218 * fails (and AFTER we did the normal mode read 1219 * to clear "at the mark"). 1220 */ 1221 if (SYNCHing) { 1222 int atmark; 1223 1224 (void) ioctl(net, SIOCATMARK, (char *)&atmark); 1225 if (atmark) { 1226 ncc = recv(net, netibuf, sizeof (netibuf), MSG_OOB); 1227 if ((ncc == -1) && (errno == EINVAL)) { 1228 ncc = read(net, netibuf, sizeof (netibuf)); 1229 if (sequenceIs(didnetreceive, gotDM)) { 1230 SYNCHing = stilloob(net); 1231 } 1232 } 1233 } else { 1234 ncc = read(net, netibuf, sizeof (netibuf)); 1235 } 1236 } else { 1237 ncc = read(net, netibuf, sizeof (netibuf)); 1238 } 1239 settimer(didnetreceive); 1240 #else /* !defined(SO_OOBINLINE)) */ 1241 ncc = read(net, netibuf, sizeof (netibuf)); 1242 #endif /* !defined(SO_OOBINLINE)) */ 1243 if (ncc < 0 && errno == EWOULDBLOCK) 1244 ncc = 0; 1245 else { 1246 if (ncc <= 0) { 1247 break; 1248 } 1249 netip = netibuf; 1250 } 1251 DIAG((TD_REPORT | TD_NETDATA), 1252 {sprintf(nfrontp, "td: netread %d chars\r\n", ncc); 1253 nfrontp += strlen(nfrontp);}); 1254 DIAG(TD_NETDATA, printdata("nd", netip, ncc)); 1255 } 1256 1257 /* 1258 * Something to read from the pty... 1259 */ 1260 if (FD_ISSET(p, &ibits)) { 1261 #ifndef STREAMSPTY 1262 pcc = read(p, ptyibuf, BUFSIZ); 1263 #else 1264 pcc = readstream(p, ptyibuf, BUFSIZ); 1265 #endif 1266 /* 1267 * On some systems, if we try to read something 1268 * off the master side before the slave side is 1269 * opened, we get EIO. 1270 */ 1271 if (pcc < 0 && (errno == EWOULDBLOCK || 1272 #ifdef EAGAIN 1273 errno == EAGAIN || 1274 #endif 1275 errno == EIO)) { 1276 pcc = 0; 1277 } else { 1278 if (pcc <= 0) 1279 break; 1280 #if !defined(CRAY2) || !defined(UNICOS5) 1281 #ifdef LINEMODE 1282 /* 1283 * If ioctl from pty, pass it through net 1284 */ 1285 if (ptyibuf[0] & TIOCPKT_IOCTL) { 1286 copy_termbuf(ptyibuf+1, pcc-1); 1287 localstat(); 1288 pcc = 1; 1289 } 1290 #endif /* LINEMODE */ 1291 if (ptyibuf[0] & TIOCPKT_FLUSHWRITE) { 1292 netclear(); /* clear buffer back */ 1293 #ifndef NO_URGENT 1294 /* 1295 * There are client telnets on some 1296 * operating systems get screwed up 1297 * royally if we send them urgent 1298 * mode data. 1299 */ 1300 *nfrontp++ = IAC; 1301 *nfrontp++ = DM; 1302 neturg = nfrontp-1; /* off by one XXX */ 1303 #endif 1304 } 1305 if (his_state_is_will(TELOPT_LFLOW) && 1306 (ptyibuf[0] & 1307 (TIOCPKT_NOSTOP|TIOCPKT_DOSTOP))) { 1308 int newflow = 1309 ptyibuf[0] & TIOCPKT_DOSTOP ? 1 : 0; 1310 if (newflow != flowmode) { 1311 flowmode = newflow; 1312 (void) sprintf(nfrontp, 1313 "%c%c%c%c%c%c", 1314 IAC, SB, TELOPT_LFLOW, 1315 flowmode ? LFLOW_ON 1316 : LFLOW_OFF, 1317 IAC, SE); 1318 nfrontp += 6; 1319 } 1320 } 1321 pcc--; 1322 ptyip = ptyibuf+1; 1323 #else /* defined(CRAY2) && defined(UNICOS5) */ 1324 if (!uselinemode) { 1325 unpcc = pcc; 1326 unptyip = ptyibuf; 1327 pcc = term_output(&unptyip, ptyibuf2, 1328 &unpcc, BUFSIZ); 1329 ptyip = ptyibuf2; 1330 } else 1331 ptyip = ptyibuf; 1332 #endif /* defined(CRAY2) && defined(UNICOS5) */ 1333 } 1334 } 1335 1336 while (pcc > 0) { 1337 if ((&netobuf[BUFSIZ] - nfrontp) < 2) 1338 break; 1339 c = *ptyip++ & 0377, pcc--; 1340 if (c == IAC) 1341 *nfrontp++ = c; 1342 #if defined(CRAY2) && defined(UNICOS5) 1343 else if (c == '\n' && 1344 my_state_is_wont(TELOPT_BINARY) && newmap) 1345 *nfrontp++ = '\r'; 1346 #endif /* defined(CRAY2) && defined(UNICOS5) */ 1347 *nfrontp++ = c; 1348 if ((c == '\r') && (my_state_is_wont(TELOPT_BINARY))) { 1349 if (pcc > 0 && ((*ptyip & 0377) == '\n')) { 1350 *nfrontp++ = *ptyip++ & 0377; 1351 pcc--; 1352 } else 1353 *nfrontp++ = '\0'; 1354 } 1355 } 1356 #if defined(CRAY2) && defined(UNICOS5) 1357 /* 1358 * If chars were left over from the terminal driver, 1359 * note their existence. 1360 */ 1361 if (!uselinemode && unpcc) { 1362 pcc = unpcc; 1363 unpcc = 0; 1364 ptyip = unptyip; 1365 } 1366 #endif /* defined(CRAY2) && defined(UNICOS5) */ 1367 1368 if (FD_ISSET(f, &obits) && (nfrontp - nbackp) > 0) 1369 netflush(); 1370 if (ncc > 0) 1371 telrcv(); 1372 if (FD_ISSET(p, &obits) && (pfrontp - pbackp) > 0) 1373 ptyflush(); 1374 } 1375 cleanup(0); 1376 } /* end of telnet */ 1377 1378 #ifndef TCSIG 1379 # ifdef TIOCSIG 1380 # define TCSIG TIOCSIG 1381 # endif 1382 #endif 1383 1384 #ifdef STREAMSPTY 1385 1386 int flowison = -1; /* current state of flow: -1 is unknown */ 1387 1388 int readstream(p, ibuf, bufsize) 1389 int p; 1390 char *ibuf; 1391 int bufsize; 1392 { 1393 int flags = 0; 1394 int ret = 0; 1395 struct termios *tsp; 1396 struct termio *tp; 1397 struct iocblk *ip; 1398 char vstop, vstart; 1399 int ixon; 1400 int newflow; 1401 1402 strbufc.maxlen = BUFSIZ; 1403 strbufc.buf = (char *)ctlbuf; 1404 strbufd.maxlen = bufsize-1; 1405 strbufd.len = 0; 1406 strbufd.buf = ibuf+1; 1407 ibuf[0] = 0; 1408 1409 ret = getmsg(p, &strbufc, &strbufd, &flags); 1410 if (ret < 0) /* error of some sort -- probably EAGAIN */ 1411 return(-1); 1412 1413 if (strbufc.len <= 0 || ctlbuf[0] == M_DATA) { 1414 /* data message */ 1415 if (strbufd.len > 0) { /* real data */ 1416 return(strbufd.len + 1); /* count header char */ 1417 } else { 1418 /* nothing there */ 1419 errno = EAGAIN; 1420 return(-1); 1421 } 1422 } 1423 1424 /* 1425 * It's a control message. Return 1, to look at the flag we set 1426 */ 1427 1428 switch (ctlbuf[0]) { 1429 case M_FLUSH: 1430 if (ibuf[1] & FLUSHW) 1431 ibuf[0] = TIOCPKT_FLUSHWRITE; 1432 return(1); 1433 1434 case M_IOCTL: 1435 ip = (struct iocblk *) (ibuf+1); 1436 1437 switch (ip->ioc_cmd) { 1438 case TCSETS: 1439 case TCSETSW: 1440 case TCSETSF: 1441 tsp = (struct termios *) 1442 (ibuf+1 + sizeof(struct iocblk)); 1443 vstop = tsp->c_cc[VSTOP]; 1444 vstart = tsp->c_cc[VSTART]; 1445 ixon = tsp->c_iflag & IXON; 1446 break; 1447 case TCSETA: 1448 case TCSETAW: 1449 case TCSETAF: 1450 tp = (struct termio *) (ibuf+1 + sizeof(struct iocblk)); 1451 vstop = tp->c_cc[VSTOP]; 1452 vstart = tp->c_cc[VSTART]; 1453 ixon = tp->c_iflag & IXON; 1454 break; 1455 default: 1456 errno = EAGAIN; 1457 return(-1); 1458 } 1459 1460 newflow = (ixon && (vstart == 021) && (vstop == 023)) ? 1 : 0; 1461 if (newflow != flowison) { /* it's a change */ 1462 flowison = newflow; 1463 ibuf[0] = newflow ? TIOCPKT_DOSTOP : TIOCPKT_NOSTOP; 1464 return(1); 1465 } 1466 } 1467 1468 /* nothing worth doing anything about */ 1469 errno = EAGAIN; 1470 return(-1); 1471 } 1472 #endif /* STREAMSPTY */ 1473 1474 /* 1475 * Send interrupt to process on other side of pty. 1476 * If it is in raw mode, just write NULL; 1477 * otherwise, write intr char. 1478 */ 1479 void 1480 interrupt() 1481 { 1482 ptyflush(); /* half-hearted */ 1483 1484 #ifdef TCSIG 1485 (void) ioctl(pty, TCSIG, (char *)SIGINT); 1486 #else /* TCSIG */ 1487 init_termbuf(); 1488 *pfrontp++ = slctab[SLC_IP].sptr ? 1489 (unsigned char)*slctab[SLC_IP].sptr : '\177'; 1490 #endif /* TCSIG */ 1491 } 1492 1493 /* 1494 * Send quit to process on other side of pty. 1495 * If it is in raw mode, just write NULL; 1496 * otherwise, write quit char. 1497 */ 1498 void 1499 sendbrk() 1500 { 1501 ptyflush(); /* half-hearted */ 1502 #ifdef TCSIG 1503 (void) ioctl(pty, TCSIG, (char *)SIGQUIT); 1504 #else /* TCSIG */ 1505 init_termbuf(); 1506 *pfrontp++ = slctab[SLC_ABORT].sptr ? 1507 (unsigned char)*slctab[SLC_ABORT].sptr : '\034'; 1508 #endif /* TCSIG */ 1509 } 1510 1511 void 1512 sendsusp() 1513 { 1514 #ifdef SIGTSTP 1515 ptyflush(); /* half-hearted */ 1516 # ifdef TCSIG 1517 (void) ioctl(pty, TCSIG, (char *)SIGTSTP); 1518 # else /* TCSIG */ 1519 *pfrontp++ = slctab[SLC_SUSP].sptr ? 1520 (unsigned char)*slctab[SLC_SUSP].sptr : '\032'; 1521 # endif /* TCSIG */ 1522 #endif /* SIGTSTP */ 1523 } 1524 1525 /* 1526 * When we get an AYT, if ^T is enabled, use that. Otherwise, 1527 * just send back "[Yes]". 1528 */ 1529 void 1530 recv_ayt() 1531 { 1532 #if defined(SIGINFO) && defined(TCSIG) 1533 if (slctab[SLC_AYT].sptr && *slctab[SLC_AYT].sptr != _POSIX_VDISABLE) { 1534 (void) ioctl(pty, TCSIG, (char *)SIGINFO); 1535 return; 1536 } 1537 #endif 1538 (void) strcpy(nfrontp, "\r\n[Yes]\r\n"); 1539 nfrontp += 9; 1540 } 1541 1542 void 1543 doeof() 1544 { 1545 init_termbuf(); 1546 1547 #if defined(LINEMODE) && defined(USE_TERMIO) && (VEOF == VMIN) 1548 if (!tty_isediting()) { 1549 extern char oldeofc; 1550 *pfrontp++ = oldeofc; 1551 return; 1552 } 1553 #endif 1554 *pfrontp++ = slctab[SLC_EOF].sptr ? 1555 (unsigned char)*slctab[SLC_EOF].sptr : '\004'; 1556 } 1557