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 8.1 (Berkeley) 06/04/93"; 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 char ptyibufbuf[BUFSIZ+4]; 72 char *ptyibuf = ptyibufbuf+3; 73 char *ptyip = ptyibufbuf+3; 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 char ttytype_sbbuf[] = { IAC, SB, TELOPT_TTYPE, TELQUAL_SEND, IAC, SE }; 559 560 int 561 getterminaltype(name) 562 char *name; 563 { 564 int retval = -1; 565 void _gettermname(); 566 567 settimer(baseline); 568 #if defined(AUTHENTICATION) 569 /* 570 * Handle the Authentication option before we do anything else. 571 */ 572 send_do(TELOPT_AUTHENTICATION, 1); 573 while (his_will_wont_is_changing(TELOPT_AUTHENTICATION)) 574 ttloop(); 575 if (his_state_is_will(TELOPT_AUTHENTICATION)) { 576 retval = auth_wait(name); 577 } 578 #endif 579 580 #ifdef ENCRYPTION 581 send_will(TELOPT_ENCRYPT, 1); 582 #endif /* ENCRYPTION */ 583 send_do(TELOPT_TTYPE, 1); 584 send_do(TELOPT_TSPEED, 1); 585 send_do(TELOPT_XDISPLOC, 1); 586 send_do(TELOPT_ENVIRON, 1); 587 while ( 588 #ifdef ENCRYPTION 589 his_do_dont_is_changing(TELOPT_ENCRYPT) || 590 #endif /* ENCRYPTION */ 591 his_will_wont_is_changing(TELOPT_TTYPE) || 592 his_will_wont_is_changing(TELOPT_TSPEED) || 593 his_will_wont_is_changing(TELOPT_XDISPLOC) || 594 his_will_wont_is_changing(TELOPT_ENVIRON)) { 595 ttloop(); 596 } 597 #ifdef ENCRYPTION 598 /* 599 * Wait for the negotiation of what type of encryption we can 600 * send with. If autoencrypt is not set, this will just return. 601 */ 602 if (his_state_is_will(TELOPT_ENCRYPT)) { 603 encrypt_wait(); 604 } 605 #endif /* ENCRYPTION */ 606 if (his_state_is_will(TELOPT_TSPEED)) { 607 static char sbbuf[] = { IAC, SB, TELOPT_TSPEED, TELQUAL_SEND, IAC, SE }; 608 609 bcopy(sbbuf, nfrontp, sizeof sbbuf); 610 nfrontp += sizeof sbbuf; 611 } 612 if (his_state_is_will(TELOPT_XDISPLOC)) { 613 static char sbbuf[] = { IAC, SB, TELOPT_XDISPLOC, TELQUAL_SEND, IAC, SE }; 614 615 bcopy(sbbuf, nfrontp, sizeof sbbuf); 616 nfrontp += sizeof sbbuf; 617 } 618 if (his_state_is_will(TELOPT_ENVIRON)) { 619 static char sbbuf[] = { IAC, SB, TELOPT_ENVIRON, TELQUAL_SEND, IAC, SE }; 620 621 bcopy(sbbuf, nfrontp, sizeof sbbuf); 622 nfrontp += sizeof sbbuf; 623 } 624 if (his_state_is_will(TELOPT_TTYPE)) { 625 626 bcopy(ttytype_sbbuf, nfrontp, sizeof ttytype_sbbuf); 627 nfrontp += sizeof ttytype_sbbuf; 628 } 629 if (his_state_is_will(TELOPT_TSPEED)) { 630 while (sequenceIs(tspeedsubopt, baseline)) 631 ttloop(); 632 } 633 if (his_state_is_will(TELOPT_XDISPLOC)) { 634 while (sequenceIs(xdisplocsubopt, baseline)) 635 ttloop(); 636 } 637 if (his_state_is_will(TELOPT_ENVIRON)) { 638 while (sequenceIs(environsubopt, baseline)) 639 ttloop(); 640 } 641 if (his_state_is_will(TELOPT_TTYPE)) { 642 char first[256], last[256]; 643 644 while (sequenceIs(ttypesubopt, baseline)) 645 ttloop(); 646 647 /* 648 * If the other side has already disabled the option, then 649 * we have to just go with what we (might) have already gotten. 650 */ 651 if (his_state_is_will(TELOPT_TTYPE) && !terminaltypeok(terminaltype)) { 652 (void) strncpy(first, terminaltype, sizeof(first)); 653 for(;;) { 654 /* 655 * Save the unknown name, and request the next name. 656 */ 657 (void) strncpy(last, terminaltype, sizeof(last)); 658 _gettermname(); 659 if (terminaltypeok(terminaltype)) 660 break; 661 if ((strncmp(last, terminaltype, sizeof(last)) == 0) || 662 his_state_is_wont(TELOPT_TTYPE)) { 663 /* 664 * We've hit the end. If this is the same as 665 * the first name, just go with it. 666 */ 667 if (strncmp(first, terminaltype, sizeof(first)) == 0) 668 break; 669 /* 670 * Get the terminal name one more time, so that 671 * RFC1091 compliant telnets will cycle back to 672 * the start of the list. 673 */ 674 _gettermname(); 675 if (strncmp(first, terminaltype, sizeof(first)) != 0) 676 (void) strncpy(terminaltype, first, sizeof(first)); 677 break; 678 } 679 } 680 } 681 } 682 return(retval); 683 } /* end of getterminaltype */ 684 685 void 686 _gettermname() 687 { 688 /* 689 * If the client turned off the option, 690 * we can't send another request, so we 691 * just return. 692 */ 693 if (his_state_is_wont(TELOPT_TTYPE)) 694 return; 695 settimer(baseline); 696 bcopy(ttytype_sbbuf, nfrontp, sizeof ttytype_sbbuf); 697 nfrontp += sizeof ttytype_sbbuf; 698 while (sequenceIs(ttypesubopt, baseline)) 699 ttloop(); 700 } 701 702 int 703 terminaltypeok(s) 704 char *s; 705 { 706 char buf[1024]; 707 708 if (terminaltype == NULL) 709 return(1); 710 711 /* 712 * tgetent() will return 1 if the type is known, and 713 * 0 if it is not known. If it returns -1, it couldn't 714 * open the database. But if we can't open the database, 715 * it won't help to say we failed, because we won't be 716 * able to verify anything else. So, we treat -1 like 1. 717 */ 718 if (tgetent(buf, s) == 0) 719 return(0); 720 return(1); 721 } 722 723 #ifndef MAXHOSTNAMELEN 724 #define MAXHOSTNAMELEN 64 725 #endif /* MAXHOSTNAMELEN */ 726 727 char *hostname; 728 char host_name[MAXHOSTNAMELEN]; 729 char remote_host_name[MAXHOSTNAMELEN]; 730 731 #ifndef convex 732 extern void telnet P((int, int)); 733 #else 734 extern void telnet P((int, int, char *)); 735 #endif 736 737 /* 738 * Get a pty, scan input lines. 739 */ 740 doit(who) 741 struct sockaddr_in *who; 742 { 743 char *host, *inet_ntoa(); 744 int t; 745 struct hostent *hp; 746 int level; 747 int ptynum; 748 char user_name[256]; 749 750 /* 751 * Find an available pty to use. 752 */ 753 #ifndef convex 754 pty = getpty(&ptynum); 755 if (pty < 0) 756 fatal(net, "All network ports in use"); 757 #else 758 for (;;) { 759 char *lp; 760 extern char *line, *getpty(); 761 762 if ((lp = getpty()) == NULL) 763 fatal(net, "Out of ptys"); 764 765 if ((pty = open(lp, 2)) >= 0) { 766 strcpy(line,lp); 767 line[5] = 't'; 768 break; 769 } 770 } 771 #endif 772 773 #if defined(_SC_CRAY_SECURE_SYS) 774 /* 775 * set ttyp line security label 776 */ 777 if (secflag) { 778 char slave_dev[16]; 779 780 sprintf(tty_dev, "/dev/pty/%03d", ptynum); 781 if (setdevs(tty_dev, &dv) < 0) 782 fatal(net, "cannot set pty security"); 783 sprintf(slave_dev, "/dev/ttyp%03d", ptynum); 784 if (setdevs(slave_dev, &dv) < 0) 785 fatal(net, "cannot set tty security"); 786 } 787 #endif /* _SC_CRAY_SECURE_SYS */ 788 789 /* get name of connected client */ 790 hp = gethostbyaddr((char *)&who->sin_addr, sizeof (struct in_addr), 791 who->sin_family); 792 793 if (hp == NULL && registerd_host_only) { 794 fatal(net, "Couldn't resolve your address into a host name.\r\n\ 795 Please contact your net administrator"); 796 } else if (hp && 797 (strlen(hp->h_name) <= ((utmp_len < 0) ? -utmp_len : utmp_len))) { 798 host = hp->h_name; 799 } else { 800 host = inet_ntoa(who->sin_addr); 801 } 802 /* 803 * We must make a copy because Kerberos is probably going 804 * to also do a gethost* and overwrite the static data... 805 */ 806 strncpy(remote_host_name, host, sizeof(remote_host_name)-1); 807 remote_host_name[sizeof(remote_host_name)-1] = 0; 808 host = remote_host_name; 809 810 (void) gethostname(host_name, sizeof (host_name)); 811 hostname = host_name; 812 813 #if defined(AUTHENTICATION) || defined(ENCRYPTION) 814 auth_encrypt_init(hostname, host, "TELNETD", 1); 815 #endif 816 817 init_env(); 818 /* 819 * get terminal type. 820 */ 821 *user_name = 0; 822 level = getterminaltype(user_name); 823 setenv("TERM", terminaltype ? terminaltype : "network", 1); 824 825 /* 826 * Start up the login process on the slave side of the terminal 827 */ 828 #ifndef convex 829 startslave(host, level, user_name); 830 831 #if defined(_SC_CRAY_SECURE_SYS) 832 if (secflag) { 833 if (setulvl(dv.dv_actlvl) < 0) 834 fatal(net,"cannot setulvl()"); 835 if (setucmp(dv.dv_actcmp) < 0) 836 fatal(net, "cannot setucmp()"); 837 } 838 #endif /* _SC_CRAY_SECURE_SYS */ 839 840 telnet(net, pty); /* begin server processing */ 841 #else 842 telnet(net, pty, host); 843 #endif 844 /*NOTREACHED*/ 845 } /* end of doit */ 846 847 #if defined(CRAY2) && defined(UNICOS5) && defined(UNICOS50) 848 int 849 Xterm_output(ibufp, obuf, icountp, ocount) 850 char **ibufp, *obuf; 851 int *icountp, ocount; 852 { 853 int ret; 854 ret = term_output(*ibufp, obuf, *icountp, ocount); 855 *ibufp += *icountp; 856 *icountp = 0; 857 return(ret); 858 } 859 #define term_output Xterm_output 860 #endif /* defined(CRAY2) && defined(UNICOS5) && defined(UNICOS50) */ 861 862 /* 863 * Main loop. Select from pty and network, and 864 * hand data to telnet receiver finite state machine. 865 */ 866 void 867 #ifndef convex 868 telnet(f, p) 869 #else 870 telnet(f, p, host) 871 #endif 872 int f, p; 873 #ifdef convex 874 char *host; 875 #endif 876 { 877 int on = 1; 878 #define TABBUFSIZ 512 879 char defent[TABBUFSIZ]; 880 char defstrs[TABBUFSIZ]; 881 #undef TABBUFSIZ 882 char *HE; 883 char *HN; 884 char *IM; 885 void netflush(); 886 887 /* 888 * Initialize the slc mapping table. 889 */ 890 get_slc_defaults(); 891 892 /* 893 * Do some tests where it is desireable to wait for a response. 894 * Rather than doing them slowly, one at a time, do them all 895 * at once. 896 */ 897 if (my_state_is_wont(TELOPT_SGA)) 898 send_will(TELOPT_SGA, 1); 899 /* 900 * Is the client side a 4.2 (NOT 4.3) system? We need to know this 901 * because 4.2 clients are unable to deal with TCP urgent data. 902 * 903 * To find out, we send out a "DO ECHO". If the remote system 904 * answers "WILL ECHO" it is probably a 4.2 client, and we note 905 * that fact ("WILL ECHO" ==> that the client will echo what 906 * WE, the server, sends it; it does NOT mean that the client will 907 * echo the terminal input). 908 */ 909 send_do(TELOPT_ECHO, 1); 910 911 #ifdef LINEMODE 912 if (his_state_is_wont(TELOPT_LINEMODE)) { 913 /* Query the peer for linemode support by trying to negotiate 914 * the linemode option. 915 */ 916 linemode = 0; 917 editmode = 0; 918 send_do(TELOPT_LINEMODE, 1); /* send do linemode */ 919 } 920 #endif /* LINEMODE */ 921 922 /* 923 * Send along a couple of other options that we wish to negotiate. 924 */ 925 send_do(TELOPT_NAWS, 1); 926 send_will(TELOPT_STATUS, 1); 927 flowmode = 1; /* default flow control state */ 928 restartany = -1; /* uninitialized... */ 929 send_do(TELOPT_LFLOW, 1); 930 931 /* 932 * Spin, waiting for a response from the DO ECHO. However, 933 * some REALLY DUMB telnets out there might not respond 934 * to the DO ECHO. So, we spin looking for NAWS, (most dumb 935 * telnets so far seem to respond with WONT for a DO that 936 * they don't understand...) because by the time we get the 937 * response, it will already have processed the DO ECHO. 938 * Kludge upon kludge. 939 */ 940 while (his_will_wont_is_changing(TELOPT_NAWS)) 941 ttloop(); 942 943 /* 944 * But... 945 * The client might have sent a WILL NAWS as part of its 946 * startup code; if so, we'll be here before we get the 947 * response to the DO ECHO. We'll make the assumption 948 * that any implementation that understands about NAWS 949 * is a modern enough implementation that it will respond 950 * to our DO ECHO request; hence we'll do another spin 951 * waiting for the ECHO option to settle down, which is 952 * what we wanted to do in the first place... 953 */ 954 if (his_want_state_is_will(TELOPT_ECHO) && 955 his_state_is_will(TELOPT_NAWS)) { 956 while (his_will_wont_is_changing(TELOPT_ECHO)) 957 ttloop(); 958 } 959 /* 960 * On the off chance that the telnet client is broken and does not 961 * respond to the DO ECHO we sent, (after all, we did send the 962 * DO NAWS negotiation after the DO ECHO, and we won't get here 963 * until a response to the DO NAWS comes back) simulate the 964 * receipt of a will echo. This will also send a WONT ECHO 965 * to the client, since we assume that the client failed to 966 * respond because it believes that it is already in DO ECHO 967 * mode, which we do not want. 968 */ 969 if (his_want_state_is_will(TELOPT_ECHO)) { 970 DIAG(TD_OPTIONS, 971 {sprintf(nfrontp, "td: simulating recv\r\n"); 972 nfrontp += strlen(nfrontp);}); 973 willoption(TELOPT_ECHO); 974 } 975 976 /* 977 * Finally, to clean things up, we turn on our echo. This 978 * will break stupid 4.2 telnets out of local terminal echo. 979 */ 980 981 if (my_state_is_wont(TELOPT_ECHO)) 982 send_will(TELOPT_ECHO, 1); 983 984 #ifndef STREAMSPTY 985 /* 986 * Turn on packet mode 987 */ 988 (void) ioctl(p, TIOCPKT, (char *)&on); 989 #endif 990 991 #if defined(LINEMODE) && defined(KLUDGELINEMODE) 992 /* 993 * Continuing line mode support. If client does not support 994 * real linemode, attempt to negotiate kludge linemode by sending 995 * the do timing mark sequence. 996 */ 997 if (lmodetype < REAL_LINEMODE) 998 send_do(TELOPT_TM, 1); 999 #endif /* defined(LINEMODE) && defined(KLUDGELINEMODE) */ 1000 1001 /* 1002 * Call telrcv() once to pick up anything received during 1003 * terminal type negotiation, 4.2/4.3 determination, and 1004 * linemode negotiation. 1005 */ 1006 telrcv(); 1007 1008 (void) ioctl(f, FIONBIO, (char *)&on); 1009 (void) ioctl(p, FIONBIO, (char *)&on); 1010 #if defined(CRAY2) && defined(UNICOS5) 1011 init_termdriver(f, p, interrupt, sendbrk); 1012 #endif 1013 1014 #if defined(SO_OOBINLINE) 1015 (void) setsockopt(net, SOL_SOCKET, SO_OOBINLINE, 1016 (char *)&on, sizeof on); 1017 #endif /* defined(SO_OOBINLINE) */ 1018 1019 #ifdef SIGTSTP 1020 (void) signal(SIGTSTP, SIG_IGN); 1021 #endif 1022 #ifdef SIGTTOU 1023 /* 1024 * Ignoring SIGTTOU keeps the kernel from blocking us 1025 * in ttioct() in /sys/tty.c. 1026 */ 1027 (void) signal(SIGTTOU, SIG_IGN); 1028 #endif 1029 1030 (void) signal(SIGCHLD, cleanup); 1031 1032 #if defined(CRAY2) && defined(UNICOS5) 1033 /* 1034 * Cray-2 will send a signal when pty modes are changed by slave 1035 * side. Set up signal handler now. 1036 */ 1037 if ((int)signal(SIGUSR1, termstat) < 0) 1038 perror("signal"); 1039 else if (ioctl(p, TCSIGME, (char *)SIGUSR1) < 0) 1040 perror("ioctl:TCSIGME"); 1041 /* 1042 * Make processing loop check terminal characteristics early on. 1043 */ 1044 termstat(); 1045 #endif 1046 1047 #ifdef TIOCNOTTY 1048 { 1049 register int t; 1050 t = open(_PATH_TTY, O_RDWR); 1051 if (t >= 0) { 1052 (void) ioctl(t, TIOCNOTTY, (char *)0); 1053 (void) close(t); 1054 } 1055 } 1056 #endif 1057 1058 #if defined(CRAY) && defined(NEWINIT) && defined(TIOCSCTTY) 1059 (void) setsid(); 1060 ioctl(p, TIOCSCTTY, 0); 1061 #endif 1062 1063 /* 1064 * Show banner that getty never gave. 1065 * 1066 * We put the banner in the pty input buffer. This way, it 1067 * gets carriage return null processing, etc., just like all 1068 * other pty --> client data. 1069 */ 1070 1071 #if !defined(CRAY) || !defined(NEWINIT) 1072 if (getenv("USER")) 1073 hostinfo = 0; 1074 #endif 1075 1076 if (getent(defent, "default") == 1) { 1077 char *getstr(); 1078 char *cp=defstrs; 1079 1080 HE = getstr("he", &cp); 1081 HN = getstr("hn", &cp); 1082 IM = getstr("im", &cp); 1083 if (HN && *HN) 1084 (void) strcpy(host_name, HN); 1085 if (IM == 0) 1086 IM = ""; 1087 } else { 1088 IM = DEFAULT_IM; 1089 HE = 0; 1090 } 1091 edithost(HE, host_name); 1092 if (hostinfo && *IM) 1093 putf(IM, ptyibuf2); 1094 1095 if (pcc) 1096 (void) strncat(ptyibuf2, ptyip, pcc+1); 1097 ptyip = ptyibuf2; 1098 pcc = strlen(ptyip); 1099 #ifdef LINEMODE 1100 /* 1101 * Last check to make sure all our states are correct. 1102 */ 1103 init_termbuf(); 1104 localstat(); 1105 #endif /* LINEMODE */ 1106 1107 DIAG(TD_REPORT, 1108 {sprintf(nfrontp, "td: Entering processing loop\r\n"); 1109 nfrontp += strlen(nfrontp);}); 1110 1111 #ifdef convex 1112 startslave(host); 1113 #endif 1114 1115 for (;;) { 1116 fd_set ibits, obits, xbits; 1117 register int c; 1118 1119 if (ncc < 0 && pcc < 0) 1120 break; 1121 1122 #if defined(CRAY2) && defined(UNICOS5) 1123 if (needtermstat) 1124 _termstat(); 1125 #endif /* defined(CRAY2) && defined(UNICOS5) */ 1126 FD_ZERO(&ibits); 1127 FD_ZERO(&obits); 1128 FD_ZERO(&xbits); 1129 /* 1130 * Never look for input if there's still 1131 * stuff in the corresponding output buffer 1132 */ 1133 if (nfrontp - nbackp || pcc > 0) { 1134 FD_SET(f, &obits); 1135 } else { 1136 FD_SET(p, &ibits); 1137 } 1138 if (pfrontp - pbackp || ncc > 0) { 1139 FD_SET(p, &obits); 1140 } else { 1141 FD_SET(f, &ibits); 1142 } 1143 if (!SYNCHing) { 1144 FD_SET(f, &xbits); 1145 } 1146 if ((c = select(16, &ibits, &obits, &xbits, 1147 (struct timeval *)0)) < 1) { 1148 if (c == -1) { 1149 if (errno == EINTR) { 1150 continue; 1151 } 1152 } 1153 sleep(5); 1154 continue; 1155 } 1156 1157 /* 1158 * Any urgent data? 1159 */ 1160 if (FD_ISSET(net, &xbits)) { 1161 SYNCHing = 1; 1162 } 1163 1164 /* 1165 * Something to read from the network... 1166 */ 1167 if (FD_ISSET(net, &ibits)) { 1168 #if !defined(SO_OOBINLINE) 1169 /* 1170 * In 4.2 (and 4.3 beta) systems, the 1171 * OOB indication and data handling in the kernel 1172 * is such that if two separate TCP Urgent requests 1173 * come in, one byte of TCP data will be overlaid. 1174 * This is fatal for Telnet, but we try to live 1175 * with it. 1176 * 1177 * In addition, in 4.2 (and...), a special protocol 1178 * is needed to pick up the TCP Urgent data in 1179 * the correct sequence. 1180 * 1181 * What we do is: if we think we are in urgent 1182 * mode, we look to see if we are "at the mark". 1183 * If we are, we do an OOB receive. If we run 1184 * this twice, we will do the OOB receive twice, 1185 * but the second will fail, since the second 1186 * time we were "at the mark", but there wasn't 1187 * any data there (the kernel doesn't reset 1188 * "at the mark" until we do a normal read). 1189 * Once we've read the OOB data, we go ahead 1190 * and do normal reads. 1191 * 1192 * There is also another problem, which is that 1193 * since the OOB byte we read doesn't put us 1194 * out of OOB state, and since that byte is most 1195 * likely the TELNET DM (data mark), we would 1196 * stay in the TELNET SYNCH (SYNCHing) state. 1197 * So, clocks to the rescue. If we've "just" 1198 * received a DM, then we test for the 1199 * presence of OOB data when the receive OOB 1200 * fails (and AFTER we did the normal mode read 1201 * to clear "at the mark"). 1202 */ 1203 if (SYNCHing) { 1204 int atmark; 1205 1206 (void) ioctl(net, SIOCATMARK, (char *)&atmark); 1207 if (atmark) { 1208 ncc = recv(net, netibuf, sizeof (netibuf), MSG_OOB); 1209 if ((ncc == -1) && (errno == EINVAL)) { 1210 ncc = read(net, netibuf, sizeof (netibuf)); 1211 if (sequenceIs(didnetreceive, gotDM)) { 1212 SYNCHing = stilloob(net); 1213 } 1214 } 1215 } else { 1216 ncc = read(net, netibuf, sizeof (netibuf)); 1217 } 1218 } else { 1219 ncc = read(net, netibuf, sizeof (netibuf)); 1220 } 1221 settimer(didnetreceive); 1222 #else /* !defined(SO_OOBINLINE)) */ 1223 ncc = read(net, netibuf, sizeof (netibuf)); 1224 #endif /* !defined(SO_OOBINLINE)) */ 1225 if (ncc < 0 && errno == EWOULDBLOCK) 1226 ncc = 0; 1227 else { 1228 if (ncc <= 0) { 1229 break; 1230 } 1231 netip = netibuf; 1232 } 1233 DIAG((TD_REPORT | TD_NETDATA), 1234 {sprintf(nfrontp, "td: netread %d chars\r\n", ncc); 1235 nfrontp += strlen(nfrontp);}); 1236 DIAG(TD_NETDATA, printdata("nd", netip, ncc)); 1237 } 1238 1239 /* 1240 * Something to read from the pty... 1241 */ 1242 if (FD_ISSET(p, &ibits)) { 1243 #ifndef STREAMSPTY 1244 pcc = read(p, ptyibuf, BUFSIZ); 1245 #else 1246 pcc = readstream(p, ptyibuf, BUFSIZ); 1247 #endif 1248 /* 1249 * On some systems, if we try to read something 1250 * off the master side before the slave side is 1251 * opened, we get EIO. 1252 */ 1253 if (pcc < 0 && (errno == EWOULDBLOCK || 1254 #ifdef EAGAIN 1255 errno == EAGAIN || 1256 #endif 1257 errno == EIO)) { 1258 pcc = 0; 1259 } else { 1260 if (pcc <= 0) 1261 break; 1262 #if !defined(CRAY2) || !defined(UNICOS5) 1263 #ifdef LINEMODE 1264 /* 1265 * If ioctl from pty, pass it through net 1266 */ 1267 if (ptyibuf[0] & TIOCPKT_IOCTL) { 1268 copy_termbuf(ptyibuf+1, pcc-1); 1269 localstat(); 1270 pcc = 1; 1271 } 1272 #endif /* LINEMODE */ 1273 if (ptyibuf[0] & TIOCPKT_FLUSHWRITE) { 1274 netclear(); /* clear buffer back */ 1275 #ifndef NO_URGENT 1276 /* 1277 * There are client telnets on some 1278 * operating systems get screwed up 1279 * royally if we send them urgent 1280 * mode data. 1281 */ 1282 *nfrontp++ = IAC; 1283 *nfrontp++ = DM; 1284 neturg = nfrontp-1; /* off by one XXX */ 1285 #endif 1286 } 1287 if (his_state_is_will(TELOPT_LFLOW) && 1288 (ptyibuf[0] & 1289 (TIOCPKT_NOSTOP|TIOCPKT_DOSTOP))) { 1290 int newflow = 1291 ptyibuf[0] & TIOCPKT_DOSTOP ? 1 : 0; 1292 if (newflow != flowmode) { 1293 flowmode = newflow; 1294 (void) sprintf(nfrontp, 1295 "%c%c%c%c%c%c", 1296 IAC, SB, TELOPT_LFLOW, 1297 flowmode ? LFLOW_ON 1298 : LFLOW_OFF, 1299 IAC, SE); 1300 nfrontp += 6; 1301 } 1302 } 1303 pcc--; 1304 ptyip = ptyibuf+1; 1305 #else /* defined(CRAY2) && defined(UNICOS5) */ 1306 if (!uselinemode) { 1307 unpcc = pcc; 1308 unptyip = ptyibuf; 1309 pcc = term_output(&unptyip, ptyibuf2, 1310 &unpcc, BUFSIZ); 1311 ptyip = ptyibuf2; 1312 } else 1313 ptyip = ptyibuf; 1314 #endif /* defined(CRAY2) && defined(UNICOS5) */ 1315 } 1316 } 1317 1318 while (pcc > 0) { 1319 if ((&netobuf[BUFSIZ] - nfrontp) < 2) 1320 break; 1321 c = *ptyip++ & 0377, pcc--; 1322 if (c == IAC) 1323 *nfrontp++ = c; 1324 #if defined(CRAY2) && defined(UNICOS5) 1325 else if (c == '\n' && 1326 my_state_is_wont(TELOPT_BINARY) && newmap) 1327 *nfrontp++ = '\r'; 1328 #endif /* defined(CRAY2) && defined(UNICOS5) */ 1329 *nfrontp++ = c; 1330 if ((c == '\r') && (my_state_is_wont(TELOPT_BINARY))) { 1331 if (pcc > 0 && ((*ptyip & 0377) == '\n')) { 1332 *nfrontp++ = *ptyip++ & 0377; 1333 pcc--; 1334 } else 1335 *nfrontp++ = '\0'; 1336 } 1337 } 1338 #if defined(CRAY2) && defined(UNICOS5) 1339 /* 1340 * If chars were left over from the terminal driver, 1341 * note their existence. 1342 */ 1343 if (!uselinemode && unpcc) { 1344 pcc = unpcc; 1345 unpcc = 0; 1346 ptyip = unptyip; 1347 } 1348 #endif /* defined(CRAY2) && defined(UNICOS5) */ 1349 1350 if (FD_ISSET(f, &obits) && (nfrontp - nbackp) > 0) 1351 netflush(); 1352 if (ncc > 0) 1353 telrcv(); 1354 if (FD_ISSET(p, &obits) && (pfrontp - pbackp) > 0) 1355 ptyflush(); 1356 } 1357 cleanup(0); 1358 } /* end of telnet */ 1359 1360 #ifndef TCSIG 1361 # ifdef TIOCSIG 1362 # define TCSIG TIOCSIG 1363 # endif 1364 #endif 1365 1366 #ifdef STREAMSPTY 1367 1368 int flowison = -1; /* current state of flow: -1 is unknown */ 1369 1370 int readstream(p, ibuf, bufsize) 1371 int p; 1372 char *ibuf; 1373 int bufsize; 1374 { 1375 int flags = 0; 1376 int ret = 0; 1377 struct termios *tsp; 1378 struct termio *tp; 1379 struct iocblk *ip; 1380 char vstop, vstart; 1381 int ixon; 1382 int newflow; 1383 1384 strbufc.maxlen = BUFSIZ; 1385 strbufc.buf = ctlbuf; 1386 strbufd.maxlen = bufsize-1; 1387 strbufd.len = 0; 1388 strbufd.buf = ibuf+1; 1389 ibuf[0] = 0; 1390 1391 ret = getmsg(p, &strbufc, &strbufd, &flags); 1392 if (ret < 0) /* error of some sort -- probably EAGAIN */ 1393 return(-1); 1394 1395 if (strbufc.len <= 0 || ctlbuf[0] == M_DATA) { 1396 /* data message */ 1397 if (strbufd.len > 0) { /* real data */ 1398 return(strbufd.len + 1); /* count header char */ 1399 } else { 1400 /* nothing there */ 1401 errno = EAGAIN; 1402 return(-1); 1403 } 1404 } 1405 1406 /* 1407 * It's a control message. Return 1, to look at the flag we set 1408 */ 1409 1410 switch (ctlbuf[0]) { 1411 case M_FLUSH: 1412 if (ibuf[1] & FLUSHW) 1413 ibuf[0] = TIOCPKT_FLUSHWRITE; 1414 return(1); 1415 1416 case M_IOCTL: 1417 ip = (struct iocblk *) (ibuf+1); 1418 1419 switch (ip->ioc_cmd) { 1420 case TCSETS: 1421 case TCSETSW: 1422 case TCSETSF: 1423 tsp = (struct termios *) 1424 (ibuf+1 + sizeof(struct iocblk)); 1425 vstop = tsp->c_cc[VSTOP]; 1426 vstart = tsp->c_cc[VSTART]; 1427 ixon = tsp->c_iflag & IXON; 1428 break; 1429 case TCSETA: 1430 case TCSETAW: 1431 case TCSETAF: 1432 tp = (struct termio *) (ibuf+1 + sizeof(struct iocblk)); 1433 vstop = tp->c_cc[VSTOP]; 1434 vstart = tp->c_cc[VSTART]; 1435 ixon = tp->c_iflag & IXON; 1436 break; 1437 default: 1438 errno = EAGAIN; 1439 return(-1); 1440 } 1441 1442 newflow = (ixon && (vstart == 021) && (vstop == 023)) ? 1 : 0; 1443 if (newflow != flowison) { /* it's a change */ 1444 flowison = newflow; 1445 ibuf[0] = newflow ? TIOCPKT_DOSTOP : TIOCPKT_NOSTOP; 1446 return(1); 1447 } 1448 } 1449 1450 /* nothing worth doing anything about */ 1451 errno = EAGAIN; 1452 return(-1); 1453 } 1454 #endif /* STREAMSPTY */ 1455 1456 /* 1457 * Send interrupt to process on other side of pty. 1458 * If it is in raw mode, just write NULL; 1459 * otherwise, write intr char. 1460 */ 1461 void 1462 interrupt() 1463 { 1464 ptyflush(); /* half-hearted */ 1465 1466 #ifdef TCSIG 1467 (void) ioctl(pty, TCSIG, (char *)SIGINT); 1468 #else /* TCSIG */ 1469 init_termbuf(); 1470 *pfrontp++ = slctab[SLC_IP].sptr ? 1471 (unsigned char)*slctab[SLC_IP].sptr : '\177'; 1472 #endif /* TCSIG */ 1473 } 1474 1475 /* 1476 * Send quit to process on other side of pty. 1477 * If it is in raw mode, just write NULL; 1478 * otherwise, write quit char. 1479 */ 1480 void 1481 sendbrk() 1482 { 1483 ptyflush(); /* half-hearted */ 1484 #ifdef TCSIG 1485 (void) ioctl(pty, TCSIG, (char *)SIGQUIT); 1486 #else /* TCSIG */ 1487 init_termbuf(); 1488 *pfrontp++ = slctab[SLC_ABORT].sptr ? 1489 (unsigned char)*slctab[SLC_ABORT].sptr : '\034'; 1490 #endif /* TCSIG */ 1491 } 1492 1493 void 1494 sendsusp() 1495 { 1496 #ifdef SIGTSTP 1497 ptyflush(); /* half-hearted */ 1498 # ifdef TCSIG 1499 (void) ioctl(pty, TCSIG, (char *)SIGTSTP); 1500 # else /* TCSIG */ 1501 *pfrontp++ = slctab[SLC_SUSP].sptr ? 1502 (unsigned char)*slctab[SLC_SUSP].sptr : '\032'; 1503 # endif /* TCSIG */ 1504 #endif /* SIGTSTP */ 1505 } 1506 1507 /* 1508 * When we get an AYT, if ^T is enabled, use that. Otherwise, 1509 * just send back "[Yes]". 1510 */ 1511 void 1512 recv_ayt() 1513 { 1514 #if defined(SIGINFO) && defined(TCSIG) 1515 if (slctab[SLC_AYT].sptr && *slctab[SLC_AYT].sptr != _POSIX_VDISABLE) { 1516 (void) ioctl(pty, TCSIG, (char *)SIGINFO); 1517 return; 1518 } 1519 #endif 1520 (void) strcpy(nfrontp, "\r\n[Yes]\r\n"); 1521 nfrontp += 9; 1522 } 1523 1524 void 1525 doeof() 1526 { 1527 init_termbuf(); 1528 1529 #if defined(LINEMODE) && defined(USE_TERMIO) && (VEOF == VMIN) 1530 if (!tty_isediting()) { 1531 extern char oldeofc; 1532 *pfrontp++ = oldeofc; 1533 return; 1534 } 1535 #endif 1536 *pfrontp++ = slctab[SLC_EOF].sptr ? 1537 (unsigned char)*slctab[SLC_EOF].sptr : '\004'; 1538 } 1539