| 1 | /* |
| 2 | * Copyright (c) 1984, 1985, 1986 by the Regents of the |
| 3 | * University of California and by Gregory Glenn Minshall. |
| 4 | * |
| 5 | * Permission to use, copy, modify, and distribute these |
| 6 | * programs and their documentation for any purpose and |
| 7 | * without fee is hereby granted, provided that this |
| 8 | * copyright and permission appear on all copies and |
| 9 | * supporting documentation, the name of the Regents of |
| 10 | * the University of California not be used in advertising |
| 11 | * or publicity pertaining to distribution of the programs |
| 12 | * without specific prior permission, and notice be given in |
| 13 | * supporting documentation that copying and distribution is |
| 14 | * by permission of the Regents of the University of California |
| 15 | * and by Gregory Glenn Minshall. Neither the Regents of the |
| 16 | * University of California nor Gregory Glenn Minshall make |
| 17 | * representations about the suitability of this software |
| 18 | * for any purpose. It is provided "as is" without |
| 19 | * express or implied warranty. |
| 20 | */ |
| 21 | |
| 22 | #ifndef lint |
| 23 | static char copyright[] = |
| 24 | "@(#) Copyright (c) 1984, 1985, 1986 Regents of the University of California.\n\ |
| 25 | All rights reserved.\n"; |
| 26 | #endif /* not lint */ |
| 27 | |
| 28 | #ifndef lint |
| 29 | static char sccsid[] = "@(#)telnet.c 3.1 10/29/86"; |
| 30 | #endif /* not lint */ |
| 31 | |
| 32 | /* |
| 33 | * User telnet program, modified for use by tn3270.c. |
| 34 | * |
| 35 | * Many of the FUNCTIONAL changes in this newest version of TELNET |
| 36 | * were suggested by Dave Borman of Cray Research, Inc. |
| 37 | * |
| 38 | * Other changes in the tn3270 side come from Alan Crosswell (Columbia), |
| 39 | * Bob Braden (ISI), Steve Jacobson (Berkeley), and Cliff Frost (Berkeley). |
| 40 | * |
| 41 | * This code is common between telnet(1c) and tn3270(1c). There are the |
| 42 | * following defines used to generate the various versions: |
| 43 | * |
| 44 | * TN3270 - This is to be linked with tn3270. |
| 45 | * |
| 46 | * DEBUG - Allow for some extra debugging operations. |
| 47 | * |
| 48 | * NOT43 - Allows the program to compile and run on |
| 49 | * a 4.2BSD system. |
| 50 | * |
| 51 | * PUTCHAR - Within tn3270, on a NOT43 system, |
| 52 | * allows the use of the 4.3 curses |
| 53 | * (greater speed updating the screen). |
| 54 | * You need the 4.3 curses for this to work. |
| 55 | * |
| 56 | * FD_SETSIZE - On whichever system, if this isn't defined, |
| 57 | * we patch over the FD_SET, etc., macros with |
| 58 | * some homebrewed ones. |
| 59 | * |
| 60 | * SO_OOBINLINE - This is a socket option which we would like |
| 61 | * to set to allow TCP urgent data to come |
| 62 | * to us "inline". This is NECESSARY for |
| 63 | * CORRECT operation, and desireable for |
| 64 | * simpler operation. |
| 65 | * |
| 66 | * LNOFLSH - Detects the presence of the LNOFLSH bit |
| 67 | * in the tty structure. |
| 68 | * |
| 69 | * unix - Compiles in unix specific stuff. |
| 70 | * |
| 71 | * msdos - Compiles in msdos specific stuff. |
| 72 | * |
| 73 | */ |
| 74 | |
| 75 | #if !defined(TN3270) |
| 76 | #define ExitString(f,s,r) { fprintf(f, s); exit(r); } |
| 77 | #define Exit(x) exit(x) |
| 78 | #define SetIn3270() |
| 79 | |
| 80 | void setcommandmode(), command(); /* forward declarations */ |
| 81 | #endif /* !defined(TN3270) */ |
| 82 | |
| 83 | #include <sys/types.h> |
| 84 | #include <sys/socket.h> |
| 85 | #include <sys/ioctl.h> |
| 86 | #include <sys/time.h> |
| 87 | |
| 88 | #include <netinet/in.h> |
| 89 | |
| 90 | #include <curses.h> |
| 91 | |
| 92 | #define TELOPTS |
| 93 | #include <arpa/telnet.h> |
| 94 | |
| 95 | #if !defined(NOT43) |
| 96 | #include <arpa/inet.h> |
| 97 | #else /* !defined(NOT43) */ |
| 98 | extern unsigned long inet_addr(); |
| 99 | extern char *inet_ntoa(); |
| 100 | #endif /* !defined(NOT43) */ |
| 101 | |
| 102 | #include <stdio.h> |
| 103 | #include <ctype.h> |
| 104 | #include <errno.h> |
| 105 | #include <signal.h> |
| 106 | #include <setjmp.h> |
| 107 | #include <netdb.h> |
| 108 | #include <strings.h> |
| 109 | |
| 110 | #if defined(TN3270) |
| 111 | #include "ctlr/screen.h" |
| 112 | #include "system/globals.h" |
| 113 | #include "telnet.ext" |
| 114 | #include "ctlr/options.ext" |
| 115 | #include "ctlr/outbound.ext" |
| 116 | #include "keyboard/termin.ext" |
| 117 | #include "general.h" |
| 118 | #endif /* defined(TN3270) */ |
| 119 | |
| 120 | |
| 121 | |
| 122 | #ifndef FD_SETSIZE |
| 123 | /* |
| 124 | * The following is defined just in case someone should want to run |
| 125 | * this telnet on a 4.2 system. |
| 126 | * |
| 127 | */ |
| 128 | |
| 129 | #define FD_SET(n, p) ((p)->fds_bits[0] |= (1<<(n))) |
| 130 | #define FD_CLR(n, p) ((p)->fds_bits[0] &= ~(1<<(n))) |
| 131 | #define FD_ISSET(n, p) ((p)->fds_bits[0] & (1<<(n))) |
| 132 | #define FD_ZERO(p) ((p)->fds_bits[0] = 0) |
| 133 | |
| 134 | #endif |
| 135 | \f |
| 136 | #define strip(x) ((x)&0x7f) |
| 137 | #define min(x,y) ((x<y)? x:y) |
| 138 | |
| 139 | #if defined(TN3270) |
| 140 | static char Ibuf[8*BUFSIZ], *Ifrontp, *Ibackp; |
| 141 | #endif /* defined(TN3270) */ |
| 142 | |
| 143 | static char ttyobuf[2*BUFSIZ], *tfrontp, *tbackp; |
| 144 | #define TTYADD(c) { if (!(SYNCHing||flushout)) { *tfrontp++ = c; } } |
| 145 | #define TTYLOC() (tfrontp) |
| 146 | #define TTYMAX() (ttyobuf+sizeof ttyobuf-1) |
| 147 | #define TTYMIN() (netobuf) |
| 148 | #define TTYBYTES() (tfrontp-tbackp) |
| 149 | #define TTYROOM() (TTYMAX()-TTYLOC()+1) |
| 150 | |
| 151 | static char netobuf[2*BUFSIZ], *nfrontp, *nbackp; |
| 152 | #define NETADD(c) { *nfrontp++ = c; } |
| 153 | #define NET2ADD(c1,c2) { NETADD(c1); NETADD(c2); } |
| 154 | #define NETLOC() (nfrontp) |
| 155 | #define NETMAX() (netobuf+sizeof netobuf-1) |
| 156 | #define NETBYTES() (nfrontp-nbackp) |
| 157 | #define NETROOM() (NETMAX()-NETLOC()+1) |
| 158 | static char *neturg; /* one past last byte of urgent data */ |
| 159 | |
| 160 | static char subbuffer[100], |
| 161 | *subpointer, *subend; /* buffer for sub-options */ |
| 162 | #define SB_CLEAR() subpointer = subbuffer; |
| 163 | #define SB_TERM() subend = subpointer; |
| 164 | #define SB_ACCUM(c) if (subpointer < (subbuffer+sizeof subbuffer)) { \ |
| 165 | *subpointer++ = (c); \ |
| 166 | } |
| 167 | |
| 168 | static char sb_terminal[] = { IAC, SB, |
| 169 | TELOPT_TTYPE, TELQUAL_IS, |
| 170 | 'I', 'B', 'M', '-', '3', '2', '7', '8', '-', '2', |
| 171 | IAC, SE }; |
| 172 | #define SBTERMMODEL 13 |
| 173 | |
| 174 | |
| 175 | static char hisopts[256]; |
| 176 | static char myopts[256]; |
| 177 | |
| 178 | static char doopt[] = { IAC, DO, '%', 'c', 0 }; |
| 179 | static char dont[] = { IAC, DONT, '%', 'c', 0 }; |
| 180 | static char will[] = { IAC, WILL, '%', 'c', 0 }; |
| 181 | static char wont[] = { IAC, WONT, '%', 'c', 0 }; |
| 182 | |
| 183 | struct cmd { |
| 184 | char *name; /* command name */ |
| 185 | char *help; /* help string */ |
| 186 | int (*handler)(); /* routine which executes command */ |
| 187 | int dohelp; /* Should we give general help information? */ |
| 188 | int needconnect; /* Do we need to be connected to execute? */ |
| 189 | }; |
| 190 | |
| 191 | static char sibuf[BUFSIZ], *sbp; |
| 192 | static char tibuf[BUFSIZ], *tbp; |
| 193 | static fd_set ibits, obits, xbits; |
| 194 | |
| 195 | |
| 196 | static int |
| 197 | connected, |
| 198 | net, |
| 199 | scc, |
| 200 | tcc, |
| 201 | showoptions, |
| 202 | In3270, /* Are we in 3270 mode? */ |
| 203 | ISend, /* trying to send network data in */ |
| 204 | debug = 0, |
| 205 | crmod, |
| 206 | netdata, |
| 207 | askedSGA = 0, /* We have talked about suppress go ahead */ |
| 208 | telnetport = 1; |
| 209 | |
| 210 | static FILE *NetTrace = 0; /* Not in bss, since needs to stay */ |
| 211 | |
| 212 | #define CONTROL(x) ((x)&0x1f) /* CTRL(x) is not portable */ |
| 213 | |
| 214 | static char |
| 215 | *prompt = 0, |
| 216 | escape, |
| 217 | echoc; |
| 218 | |
| 219 | static int |
| 220 | SYNCHing, /* we are in TELNET SYNCH mode */ |
| 221 | flushout, /* flush output */ |
| 222 | autoflush = 0, /* flush output when interrupting? */ |
| 223 | autosynch, /* send interrupt characters with SYNCH? */ |
| 224 | localchars, /* we recognize interrupt/quit */ |
| 225 | donelclchars, /* the user has set "localchars" */ |
| 226 | dontlecho; /* do we suppress local echoing right now? */ |
| 227 | |
| 228 | /* The following are some tn3270 specific flags */ |
| 229 | #if defined(TN3270) |
| 230 | |
| 231 | static int |
| 232 | Sent3270TerminalType; /* Have we said we are a 3270? */ |
| 233 | |
| 234 | /* |
| 235 | * Telnet receiver states for fsm |
| 236 | */ |
| 237 | #define TS_DATA 0 |
| 238 | #define TS_IAC 1 |
| 239 | #define TS_WILL 2 |
| 240 | #define TS_WONT 3 |
| 241 | #define TS_DO 4 |
| 242 | #define TS_DONT 5 |
| 243 | #define TS_CR 6 |
| 244 | #define TS_SB 7 /* sub-option collection */ |
| 245 | #define TS_SE 8 /* looking for sub-option end */ |
| 246 | |
| 247 | static int telrcv_state = TS_DATA; |
| 248 | /* Some real, live, globals. */ |
| 249 | int |
| 250 | #if defined(unix) |
| 251 | HaveInput, /* There is input available to scan */ |
| 252 | #endif /* defined(unix) */ |
| 253 | tout, /* Output file descriptor */ |
| 254 | tin; /* Input file descriptor */ |
| 255 | #if defined(unix) |
| 256 | char *transcom = 0; /* transparent mode command (default: none) */ |
| 257 | #endif /* defined(unix) */ |
| 258 | |
| 259 | #else /* defined(TN3270) */ |
| 260 | static int tin, tout; /* file descriptors */ |
| 261 | #endif /* defined(TN3270) */ |
| 262 | |
| 263 | static char line[200]; |
| 264 | #if defined(TN3270) && defined(unix) |
| 265 | static char tline[200]; |
| 266 | #endif /* defined(TN3270) && defined(unix) */ |
| 267 | static int margc; |
| 268 | static char *margv[20]; |
| 269 | |
| 270 | static jmp_buf toplevel = 0; |
| 271 | static jmp_buf peerdied; |
| 272 | |
| 273 | extern int errno; |
| 274 | |
| 275 | |
| 276 | static struct sockaddr_in sin; |
| 277 | |
| 278 | static struct servent *sp = 0; |
| 279 | |
| 280 | static struct tchars otc = { 0 }, ntc = { 0 }; |
| 281 | static struct ltchars oltc = { 0 }, nltc = { 0 }; |
| 282 | static struct sgttyb ottyb = { 0 }, nttyb = { 0 }; |
| 283 | static int flushline; |
| 284 | |
| 285 | static char *hostname; |
| 286 | static char hnamebuf[32]; |
| 287 | |
| 288 | /* |
| 289 | * The following are some clocks used to decide how to interpret |
| 290 | * the relationship between various variables. |
| 291 | */ |
| 292 | |
| 293 | static struct { |
| 294 | int |
| 295 | system, /* what the current time is */ |
| 296 | echotoggle, /* last time user entered echo character */ |
| 297 | modenegotiated, /* last time operating mode negotiated */ |
| 298 | didnetreceive, /* last time we read data from network */ |
| 299 | gotDM; /* when did we last see a data mark */ |
| 300 | } clocks; |
| 301 | |
| 302 | #define settimer(x) clocks.x = clocks.system++ |
| 303 | \f |
| 304 | /* |
| 305 | * Initialize variables. |
| 306 | */ |
| 307 | |
| 308 | static void |
| 309 | tninit() |
| 310 | { |
| 311 | Ifrontp = Ibackp = Ibuf; |
| 312 | tfrontp = tbackp = ttyobuf; |
| 313 | nfrontp = nbackp = netobuf; |
| 314 | |
| 315 | /* Don't change telnetport */ |
| 316 | SB_CLEAR(); |
| 317 | ClearArray(hisopts); |
| 318 | ClearArray(myopts); |
| 319 | sbp = sibuf; |
| 320 | tbp = tibuf; |
| 321 | |
| 322 | connected = net = scc = tcc = In3270 = ISend = 0; |
| 323 | telnetport = 0; |
| 324 | |
| 325 | SYNCHing = 0; |
| 326 | Sent3270TerminalType = 0; |
| 327 | |
| 328 | #if defined(unix) |
| 329 | HaveInput = 0; |
| 330 | #endif /* defined(unix) */ |
| 331 | errno = 0; |
| 332 | |
| 333 | flushline = 0; |
| 334 | |
| 335 | /* Don't change NetTrace */ |
| 336 | |
| 337 | escape = CONTROL(']'); |
| 338 | echoc = CONTROL('E'); |
| 339 | |
| 340 | flushline = 1; |
| 341 | sp = getservbyname("telnet", "tcp"); |
| 342 | if (sp == 0) { |
| 343 | ExitString(stderr, "telnet: tcp/telnet: unknown service\n",1); |
| 344 | /*NOTREACHED*/ |
| 345 | } |
| 346 | |
| 347 | #if defined(TN3270) |
| 348 | init_ctlr(); /* Initialize some things */ |
| 349 | init_keyboard(); |
| 350 | init_screen(); |
| 351 | init_system(); |
| 352 | #endif /* defined(TN3270) */ |
| 353 | } |
| 354 | \f |
| 355 | /* |
| 356 | * Various utility routines. |
| 357 | */ |
| 358 | |
| 359 | static void |
| 360 | makeargv() |
| 361 | { |
| 362 | register char *cp; |
| 363 | register char **argp = margv; |
| 364 | |
| 365 | margc = 0; |
| 366 | for (cp = line; *cp;) { |
| 367 | while (isspace(*cp)) |
| 368 | cp++; |
| 369 | if (*cp == '\0') |
| 370 | break; |
| 371 | *argp++ = cp; |
| 372 | margc += 1; |
| 373 | while (*cp != '\0' && !isspace(*cp)) |
| 374 | cp++; |
| 375 | if (*cp == '\0') |
| 376 | break; |
| 377 | *cp++ = '\0'; |
| 378 | } |
| 379 | *argp++ = 0; |
| 380 | } |
| 381 | |
| 382 | static char *ambiguous; /* special return value */ |
| 383 | #define Ambiguous(t) ((t)&ambiguous) |
| 384 | |
| 385 | |
| 386 | static char ** |
| 387 | genget(name, table, next) |
| 388 | char *name; /* name to match */ |
| 389 | char **table; /* name entry in table */ |
| 390 | char **(*next)(); /* routine to return next entry in table */ |
| 391 | { |
| 392 | register char *p, *q; |
| 393 | register char **c, **found; |
| 394 | register int nmatches, longest; |
| 395 | |
| 396 | longest = 0; |
| 397 | nmatches = 0; |
| 398 | found = 0; |
| 399 | for (c = table; (p = *c) != 0; c = (*next)(c)) { |
| 400 | for (q = name; |
| 401 | (*q == *p) || (isupper(*q) && tolower(*q) == *p); p++, q++) |
| 402 | if (*q == 0) /* exact match? */ |
| 403 | return (c); |
| 404 | if (!*q) { /* the name was a prefix */ |
| 405 | if (q - name > longest) { |
| 406 | longest = q - name; |
| 407 | nmatches = 1; |
| 408 | found = c; |
| 409 | } else if (q - name == longest) |
| 410 | nmatches++; |
| 411 | } |
| 412 | } |
| 413 | if (nmatches > 1) |
| 414 | return Ambiguous(char **); |
| 415 | return (found); |
| 416 | } |
| 417 | |
| 418 | /* |
| 419 | * Make a character string into a number. |
| 420 | * |
| 421 | * Todo: 1. Could take random integers (12, 0x12, 012, 0b1). |
| 422 | */ |
| 423 | |
| 424 | static |
| 425 | special(s) |
| 426 | register char *s; |
| 427 | { |
| 428 | register char c; |
| 429 | char b; |
| 430 | |
| 431 | switch (*s) { |
| 432 | case '^': |
| 433 | b = *++s; |
| 434 | if (b == '?') { |
| 435 | c = b | 0x40; /* DEL */ |
| 436 | } else { |
| 437 | c = b & 0x1f; |
| 438 | } |
| 439 | break; |
| 440 | default: |
| 441 | c = *s; |
| 442 | break; |
| 443 | } |
| 444 | return c; |
| 445 | } |
| 446 | |
| 447 | /* |
| 448 | * Construct a control character sequence |
| 449 | * for a special character. |
| 450 | */ |
| 451 | static char * |
| 452 | control(c) |
| 453 | register int c; |
| 454 | { |
| 455 | static char buf[3]; |
| 456 | |
| 457 | if (c == 0x7f) |
| 458 | return ("^?"); |
| 459 | if (c == '\377') { |
| 460 | return "off"; |
| 461 | } |
| 462 | if (c >= 0x20) { |
| 463 | buf[0] = c; |
| 464 | buf[1] = 0; |
| 465 | } else { |
| 466 | buf[0] = '^'; |
| 467 | buf[1] = '@'+c; |
| 468 | buf[2] = 0; |
| 469 | } |
| 470 | return (buf); |
| 471 | } |
| 472 | |
| 473 | |
| 474 | /* |
| 475 | * upcase() |
| 476 | * |
| 477 | * Upcase (in place) the argument. |
| 478 | */ |
| 479 | |
| 480 | static void |
| 481 | upcase(argument) |
| 482 | register char *argument; |
| 483 | { |
| 484 | register int c; |
| 485 | |
| 486 | while ((c = *argument) != 0) { |
| 487 | if (islower(c)) { |
| 488 | *argument = toupper(c); |
| 489 | } |
| 490 | argument++; |
| 491 | } |
| 492 | } |
| 493 | \f |
| 494 | /* |
| 495 | * The following are routines used to print out debugging information. |
| 496 | */ |
| 497 | |
| 498 | |
| 499 | static void |
| 500 | Dump(direction, buffer, length) |
| 501 | char direction; |
| 502 | char *buffer; |
| 503 | int length; |
| 504 | { |
| 505 | # define BYTES_PER_LINE 32 |
| 506 | # define min(x,y) ((x<y)? x:y) |
| 507 | char *pThis; |
| 508 | int offset; |
| 509 | |
| 510 | offset = 0; |
| 511 | |
| 512 | while (length) { |
| 513 | /* print one line */ |
| 514 | fprintf(NetTrace, "%c 0x%x\t", direction, offset); |
| 515 | pThis = buffer; |
| 516 | buffer = buffer+min(length, BYTES_PER_LINE); |
| 517 | while (pThis < buffer) { |
| 518 | fprintf(NetTrace, "%.2x", (*pThis)&0xff); |
| 519 | pThis++; |
| 520 | } |
| 521 | fprintf(NetTrace, "\n"); |
| 522 | length -= BYTES_PER_LINE; |
| 523 | offset += BYTES_PER_LINE; |
| 524 | if (length < 0) { |
| 525 | return; |
| 526 | } |
| 527 | /* find next unique line */ |
| 528 | } |
| 529 | } |
| 530 | |
| 531 | |
| 532 | /*VARARGS*/ |
| 533 | static void |
| 534 | printoption(direction, fmt, option, what) |
| 535 | char *direction, *fmt; |
| 536 | int option, what; |
| 537 | { |
| 538 | if (!showoptions) |
| 539 | return; |
| 540 | fprintf(NetTrace, "%s ", direction+1); |
| 541 | if (fmt == doopt) |
| 542 | fmt = "do"; |
| 543 | else if (fmt == dont) |
| 544 | fmt = "dont"; |
| 545 | else if (fmt == will) |
| 546 | fmt = "will"; |
| 547 | else if (fmt == wont) |
| 548 | fmt = "wont"; |
| 549 | else |
| 550 | fmt = "???"; |
| 551 | if (option < (sizeof telopts/sizeof telopts[0])) |
| 552 | fprintf(NetTrace, "%s %s", fmt, telopts[option]); |
| 553 | else |
| 554 | fprintf(NetTrace, "%s %d", fmt, option); |
| 555 | if (*direction == '<') { |
| 556 | fprintf(NetTrace, "\r\n"); |
| 557 | return; |
| 558 | } |
| 559 | fprintf(NetTrace, " (%s)\r\n", what ? "reply" : "don't reply"); |
| 560 | } |
| 561 | |
| 562 | static void |
| 563 | printsub(direction, pointer, length) |
| 564 | char *direction, /* "<" or ">" */ |
| 565 | *pointer; /* where suboption data sits */ |
| 566 | int length; /* length of suboption data */ |
| 567 | { |
| 568 | if (showoptions) { |
| 569 | fprintf(NetTrace, "%s suboption ", |
| 570 | (direction[0] == '<')? "Received":"Sent"); |
| 571 | switch (pointer[0]) { |
| 572 | case TELOPT_TTYPE: |
| 573 | fprintf(NetTrace, "Terminal type "); |
| 574 | switch (pointer[1]) { |
| 575 | case TELQUAL_IS: |
| 576 | { |
| 577 | char tmpbuf[sizeof subbuffer]; |
| 578 | int minlen = min(length, sizeof tmpbuf); |
| 579 | |
| 580 | bcopy(pointer+2, tmpbuf, minlen); |
| 581 | tmpbuf[minlen-1] = 0; |
| 582 | fprintf(NetTrace, "is %s.\n", tmpbuf); |
| 583 | } |
| 584 | break; |
| 585 | case TELQUAL_SEND: |
| 586 | fprintf(NetTrace, "- request to send.\n"); |
| 587 | break; |
| 588 | default: |
| 589 | fprintf(NetTrace, |
| 590 | "- unknown qualifier %d (0x%x).\n", pointer[1]); |
| 591 | } |
| 592 | break; |
| 593 | default: |
| 594 | fprintf(NetTrace, "Unknown option %d (0x%x)\n", |
| 595 | pointer[0], pointer[0]); |
| 596 | } |
| 597 | } |
| 598 | } |
| 599 | \f |
| 600 | /* |
| 601 | * Check to see if any out-of-band data exists on a socket (for |
| 602 | * Telnet "synch" processing). |
| 603 | */ |
| 604 | |
| 605 | static int |
| 606 | stilloob(s) |
| 607 | int s; /* socket number */ |
| 608 | { |
| 609 | static struct timeval timeout = { 0 }; |
| 610 | fd_set excepts; |
| 611 | int value; |
| 612 | |
| 613 | do { |
| 614 | FD_ZERO(&excepts); |
| 615 | FD_SET(s, &excepts); |
| 616 | value = select(s+1, (fd_set *)0, (fd_set *)0, &excepts, &timeout); |
| 617 | } while ((value == -1) && (errno == EINTR)); |
| 618 | |
| 619 | if (value < 0) { |
| 620 | perror("select"); |
| 621 | quit(); |
| 622 | } |
| 623 | if (FD_ISSET(s, &excepts)) { |
| 624 | return 1; |
| 625 | } else { |
| 626 | return 0; |
| 627 | } |
| 628 | } |
| 629 | |
| 630 | |
| 631 | /* |
| 632 | * netflush |
| 633 | * Send as much data as possible to the network, |
| 634 | * handling requests for urgent data. |
| 635 | * |
| 636 | * The return value indicates whether we did any |
| 637 | * useful work. |
| 638 | */ |
| 639 | |
| 640 | |
| 641 | int |
| 642 | netflush() |
| 643 | { |
| 644 | int n; |
| 645 | |
| 646 | if ((n = nfrontp - nbackp) > 0) { |
| 647 | if (!neturg) { |
| 648 | n = write(net, nbackp, n); /* normal write */ |
| 649 | } else { |
| 650 | n = neturg - nbackp; |
| 651 | /* |
| 652 | * In 4.2 (and 4.3) systems, there is some question about |
| 653 | * what byte in a sendOOB operation is the "OOB" data. |
| 654 | * To make ourselves compatible, we only send ONE byte |
| 655 | * out of band, the one WE THINK should be OOB (though |
| 656 | * we really have more the TCP philosophy of urgent data |
| 657 | * rather than the Unix philosophy of OOB data). |
| 658 | */ |
| 659 | if (n > 1) { |
| 660 | n = send(net, nbackp, n-1, 0); /* send URGENT all by itself */ |
| 661 | } else { |
| 662 | n = send(net, nbackp, n, MSG_OOB); /* URGENT data */ |
| 663 | } |
| 664 | } |
| 665 | } |
| 666 | if (n < 0) { |
| 667 | if (errno != ENOBUFS && errno != EWOULDBLOCK) { |
| 668 | setcommandmode(); |
| 669 | perror(hostname); |
| 670 | close(net); |
| 671 | neturg = 0; |
| 672 | longjmp(peerdied, -1); |
| 673 | /*NOTREACHED*/ |
| 674 | } |
| 675 | n = 0; |
| 676 | } |
| 677 | if (netdata && n) { |
| 678 | Dump('>', nbackp, n); |
| 679 | } |
| 680 | nbackp += n; |
| 681 | if (nbackp >= neturg) { |
| 682 | neturg = 0; |
| 683 | } |
| 684 | if (nbackp == nfrontp) { |
| 685 | nbackp = nfrontp = netobuf; |
| 686 | } |
| 687 | return n > 0; |
| 688 | } |
| 689 | \f |
| 690 | /* |
| 691 | * nextitem() |
| 692 | * |
| 693 | * Return the address of the next "item" in the TELNET data |
| 694 | * stream. This will be the address of the next character if |
| 695 | * the current address is a user data character, or it will |
| 696 | * be the address of the character following the TELNET command |
| 697 | * if the current address is a TELNET IAC ("I Am a Command") |
| 698 | * character. |
| 699 | */ |
| 700 | |
| 701 | static char * |
| 702 | nextitem(current) |
| 703 | char *current; |
| 704 | { |
| 705 | if ((*current&0xff) != IAC) { |
| 706 | return current+1; |
| 707 | } |
| 708 | switch (*(current+1)&0xff) { |
| 709 | case DO: |
| 710 | case DONT: |
| 711 | case WILL: |
| 712 | case WONT: |
| 713 | return current+3; |
| 714 | case SB: /* loop forever looking for the SE */ |
| 715 | { |
| 716 | register char *look = current+2; |
| 717 | |
| 718 | for (;;) { |
| 719 | if ((*look++&0xff) == IAC) { |
| 720 | if ((*look++&0xff) == SE) { |
| 721 | return look; |
| 722 | } |
| 723 | } |
| 724 | } |
| 725 | } |
| 726 | default: |
| 727 | return current+2; |
| 728 | } |
| 729 | } |
| 730 | /* |
| 731 | * netclear() |
| 732 | * |
| 733 | * We are about to do a TELNET SYNCH operation. Clear |
| 734 | * the path to the network. |
| 735 | * |
| 736 | * Things are a bit tricky since we may have sent the first |
| 737 | * byte or so of a previous TELNET command into the network. |
| 738 | * So, we have to scan the network buffer from the beginning |
| 739 | * until we are up to where we want to be. |
| 740 | * |
| 741 | * A side effect of what we do, just to keep things |
| 742 | * simple, is to clear the urgent data pointer. The principal |
| 743 | * caller should be setting the urgent data pointer AFTER calling |
| 744 | * us in any case. |
| 745 | */ |
| 746 | |
| 747 | static void |
| 748 | netclear() |
| 749 | { |
| 750 | register char *thisitem, *next; |
| 751 | char *good; |
| 752 | #define wewant(p) ((nfrontp > p) && ((*p&0xff) == IAC) && \ |
| 753 | ((*(p+1)&0xff) != EC) && ((*(p+1)&0xff) != EL)) |
| 754 | |
| 755 | thisitem = netobuf; |
| 756 | |
| 757 | while ((next = nextitem(thisitem)) <= nbackp) { |
| 758 | thisitem = next; |
| 759 | } |
| 760 | |
| 761 | /* Now, thisitem is first before/at boundary. */ |
| 762 | |
| 763 | good = netobuf; /* where the good bytes go */ |
| 764 | |
| 765 | while (nfrontp > thisitem) { |
| 766 | if (wewant(thisitem)) { |
| 767 | int length; |
| 768 | |
| 769 | next = thisitem; |
| 770 | do { |
| 771 | next = nextitem(next); |
| 772 | } while (wewant(next) && (nfrontp > next)); |
| 773 | length = next-thisitem; |
| 774 | bcopy(thisitem, good, length); |
| 775 | good += length; |
| 776 | thisitem = next; |
| 777 | } else { |
| 778 | thisitem = nextitem(thisitem); |
| 779 | } |
| 780 | } |
| 781 | |
| 782 | nbackp = netobuf; |
| 783 | nfrontp = good; /* next byte to be sent */ |
| 784 | neturg = 0; |
| 785 | } |
| 786 | \f |
| 787 | /* |
| 788 | * These routines add various telnet commands to the data stream. |
| 789 | */ |
| 790 | |
| 791 | #if defined(NOT43) |
| 792 | static int |
| 793 | #else /* defined(NOT43) */ |
| 794 | static void |
| 795 | #endif /* defined(NOT43) */ |
| 796 | dosynch() |
| 797 | { |
| 798 | netclear(); /* clear the path to the network */ |
| 799 | NET2ADD(IAC, DM); |
| 800 | neturg = NETLOC()-1; /* Some systems are off by one XXX */ |
| 801 | |
| 802 | #if defined(NOT43) |
| 803 | return 0; |
| 804 | #endif /* defined(NOT43) */ |
| 805 | } |
| 806 | |
| 807 | static void |
| 808 | doflush() |
| 809 | { |
| 810 | NET2ADD(IAC, DO); |
| 811 | NETADD(TELOPT_TM); |
| 812 | flushline = 1; |
| 813 | flushout = 1; |
| 814 | ttyflush(); |
| 815 | /* do printoption AFTER flush, otherwise the output gets tossed... */ |
| 816 | printoption("<SENT", doopt, TELOPT_TM, 0); |
| 817 | } |
| 818 | |
| 819 | static void |
| 820 | intp() |
| 821 | { |
| 822 | NET2ADD(IAC, IP); |
| 823 | if (autoflush) { |
| 824 | doflush(); |
| 825 | } |
| 826 | if (autosynch) { |
| 827 | dosynch(); |
| 828 | } |
| 829 | } |
| 830 | |
| 831 | static void |
| 832 | sendbrk() |
| 833 | { |
| 834 | NET2ADD(IAC, BREAK); |
| 835 | if (autoflush) { |
| 836 | doflush(); |
| 837 | } |
| 838 | if (autosynch) { |
| 839 | dosynch(); |
| 840 | } |
| 841 | } |
| 842 | \f |
| 843 | /* |
| 844 | * Send as much data as possible to the terminal. |
| 845 | * |
| 846 | * The return value indicates whether we did any |
| 847 | * useful work. |
| 848 | */ |
| 849 | |
| 850 | |
| 851 | static int |
| 852 | ttyflush() |
| 853 | { |
| 854 | int n; |
| 855 | |
| 856 | if ((n = tfrontp - tbackp) > 0) { |
| 857 | if (!(SYNCHing||flushout)) { |
| 858 | n = write(tout, tbackp, n); |
| 859 | } else { |
| 860 | ioctl(fileno(stdout), TIOCFLUSH, (char *) 0); |
| 861 | /* we leave 'n' alone! */ |
| 862 | } |
| 863 | } |
| 864 | if (n >= 0) { |
| 865 | tbackp += n; |
| 866 | if (tbackp == tfrontp) { |
| 867 | tbackp = tfrontp = ttyobuf; |
| 868 | } |
| 869 | } |
| 870 | return n > 0; |
| 871 | } |
| 872 | |
| 873 | #if defined(TN3270) |
| 874 | |
| 875 | #if defined(unix) |
| 876 | static void |
| 877 | inputAvailable() |
| 878 | { |
| 879 | HaveInput = 1; |
| 880 | } |
| 881 | #endif /* defined(unix) */ |
| 882 | |
| 883 | void |
| 884 | outputPurge() |
| 885 | { |
| 886 | int tmp = flushout; |
| 887 | |
| 888 | flushout = 1; |
| 889 | |
| 890 | ttyflush(); |
| 891 | |
| 892 | flushout = tmp; |
| 893 | } |
| 894 | |
| 895 | #endif /* defined(TN3270) */ |
| 896 | \f |
| 897 | #if defined(unix) |
| 898 | /* |
| 899 | * Various signal handling routines. |
| 900 | */ |
| 901 | |
| 902 | static void |
| 903 | deadpeer() |
| 904 | { |
| 905 | setcommandmode(); |
| 906 | longjmp(peerdied, -1); |
| 907 | } |
| 908 | |
| 909 | static void |
| 910 | intr() |
| 911 | { |
| 912 | if (localchars) { |
| 913 | intp(); |
| 914 | return; |
| 915 | } |
| 916 | setcommandmode(); |
| 917 | longjmp(toplevel, -1); |
| 918 | } |
| 919 | |
| 920 | static void |
| 921 | intr2() |
| 922 | { |
| 923 | if (localchars) { |
| 924 | sendbrk(); |
| 925 | return; |
| 926 | } |
| 927 | } |
| 928 | |
| 929 | static void |
| 930 | doescape() |
| 931 | { |
| 932 | command(0); |
| 933 | } |
| 934 | #endif /* defined(unix) */ |
| 935 | \f |
| 936 | static int globalmode = 0; |
| 937 | /* Various modes */ |
| 938 | #define MODE_LINE(m) (modelist[m].modetype & LINE) |
| 939 | #define MODE_LOCAL_CHARS(m) (modelist[m].modetype & LOCAL_CHARS) |
| 940 | |
| 941 | #define LOCAL_CHARS 0x01 /* Characters processed locally */ |
| 942 | #define LINE 0x02 /* Line-by-line mode of operation */ |
| 943 | |
| 944 | static struct { |
| 945 | char *modedescriptions; |
| 946 | char modetype; |
| 947 | } modelist[] = { |
| 948 | { "telnet command mode", 0 }, |
| 949 | { "character-at-a-time mode", 0 }, |
| 950 | { "character-at-a-time mode (local echo)", LOCAL_CHARS }, |
| 951 | { "line-by-line mode (remote echo)", LINE | LOCAL_CHARS }, |
| 952 | { "line-by-line mode", LINE | LOCAL_CHARS }, |
| 953 | { "line-by-line mode (local echoing suppressed)", LINE | LOCAL_CHARS }, |
| 954 | { "3270 mode", 0 }, |
| 955 | }; |
| 956 | /* |
| 957 | * Mode - set up terminal to a specific mode. |
| 958 | */ |
| 959 | |
| 960 | |
| 961 | static void |
| 962 | mode(f) |
| 963 | register int f; |
| 964 | { |
| 965 | static int prevmode = 0; |
| 966 | struct tchars *tc; |
| 967 | struct tchars tc3; |
| 968 | struct ltchars *ltc; |
| 969 | struct sgttyb sb; |
| 970 | int onoff; |
| 971 | #if defined(unix) |
| 972 | int old; |
| 973 | #endif /* defined(unix) */ |
| 974 | struct tchars notc2; |
| 975 | struct ltchars noltc2; |
| 976 | static struct tchars notc = { -1, -1, -1, -1, -1, -1 }; |
| 977 | static struct ltchars noltc = { -1, -1, -1, -1, -1, -1 }; |
| 978 | |
| 979 | globalmode = f; |
| 980 | if (prevmode == f) |
| 981 | return; |
| 982 | #if defined(unix) |
| 983 | old = prevmode; |
| 984 | #endif /* defined(unix) */ |
| 985 | prevmode = f; |
| 986 | sb = nttyb; |
| 987 | |
| 988 | switch (f) { |
| 989 | |
| 990 | case 0: |
| 991 | onoff = 0; |
| 992 | tc = &otc; |
| 993 | ltc = &oltc; |
| 994 | break; |
| 995 | |
| 996 | case 1: /* remote character processing, remote echo */ |
| 997 | case 2: /* remote character processing, local echo */ |
| 998 | case 6: /* 3270 mode - like 1, but with xon/xoff local */ |
| 999 | /* (might be nice to have "6" in telnet also...) */ |
| 1000 | sb.sg_flags |= CBREAK; |
| 1001 | if ((f == 1) || (f == 6)) { |
| 1002 | sb.sg_flags &= ~(ECHO|CRMOD); |
| 1003 | } else { |
| 1004 | sb.sg_flags |= ECHO|CRMOD; |
| 1005 | } |
| 1006 | sb.sg_erase = sb.sg_kill = -1; |
| 1007 | if (f == 6) { |
| 1008 | tc = &tc3; |
| 1009 | tc3 = notc; |
| 1010 | /* get XON, XOFF characters */ |
| 1011 | tc3.t_startc = otc.t_startc; |
| 1012 | tc3.t_stopc = otc.t_stopc; |
| 1013 | } else { |
| 1014 | /* |
| 1015 | * If user hasn't specified one way or the other, |
| 1016 | * then default to not trapping signals. |
| 1017 | */ |
| 1018 | if (!donelclchars) { |
| 1019 | localchars = 0; |
| 1020 | } |
| 1021 | if (localchars) { |
| 1022 | notc2 = notc; |
| 1023 | notc2.t_intrc = ntc.t_intrc; |
| 1024 | notc2.t_quitc = ntc.t_quitc; |
| 1025 | tc = ¬c2; |
| 1026 | } else { |
| 1027 | tc = ¬c; |
| 1028 | } |
| 1029 | } |
| 1030 | ltc = &noltc; |
| 1031 | onoff = 1; |
| 1032 | break; |
| 1033 | case 3: /* local character processing, remote echo */ |
| 1034 | case 4: /* local character processing, local echo */ |
| 1035 | case 5: /* local character processing, no echo */ |
| 1036 | sb.sg_flags &= ~CBREAK; |
| 1037 | sb.sg_flags |= CRMOD; |
| 1038 | if (f == 4) |
| 1039 | sb.sg_flags |= ECHO; |
| 1040 | else |
| 1041 | sb.sg_flags &= ~ECHO; |
| 1042 | notc2 = ntc; |
| 1043 | tc = ¬c2; |
| 1044 | noltc2 = oltc; |
| 1045 | ltc = &noltc2; |
| 1046 | #if defined(unix) |
| 1047 | /* |
| 1048 | * If user hasn't specified one way or the other, |
| 1049 | * then default to trapping signals. |
| 1050 | */ |
| 1051 | if (!donelclchars) { |
| 1052 | localchars = 1; |
| 1053 | } |
| 1054 | if (localchars) { |
| 1055 | notc2.t_brkc = nltc.t_flushc; |
| 1056 | noltc2.t_flushc = -1; |
| 1057 | } else { |
| 1058 | notc2.t_intrc = notc2.t_quitc = -1; |
| 1059 | } |
| 1060 | #else /* defined(unix) */ |
| 1061 | notc2.t_intrc = -1; |
| 1062 | #endif /* defined(unix) */ |
| 1063 | noltc2.t_suspc = escape; |
| 1064 | noltc2.t_dsuspc = -1; |
| 1065 | onoff = 1; |
| 1066 | break; |
| 1067 | |
| 1068 | default: |
| 1069 | return; |
| 1070 | } |
| 1071 | ioctl(tin, TIOCSLTC, (char *)ltc); |
| 1072 | ioctl(tin, TIOCSETC, (char *)tc); |
| 1073 | ioctl(tin, TIOCSETP, (char *)&sb); |
| 1074 | #if (!defined(TN3270)) || ((!defined(NOT43)) || defined(PUTCHAR)) |
| 1075 | ioctl(tin, FIONBIO, (char *)&onoff); |
| 1076 | ioctl(tout, FIONBIO, (char *)&onoff); |
| 1077 | #endif /* (!defined(TN3270)) || ((!defined(NOT43)) || defined(PUTCHAR)) */ |
| 1078 | #if defined(TN3270) && !defined(DEBUG) |
| 1079 | ioctl(tin, FIOASYNC, (char *)&onoff); |
| 1080 | #endif /* defined(TN3270) && !defined(DEBUG) */ |
| 1081 | |
| 1082 | #if defined(unix) |
| 1083 | if (MODE_LINE(f)) { |
| 1084 | signal(SIGTSTP, doescape); |
| 1085 | } else if (MODE_LINE(old)) { |
| 1086 | signal(SIGTSTP, SIG_DFL); |
| 1087 | sigsetmask(sigblock(0) & ~(1<<(SIGTSTP-1))); |
| 1088 | } |
| 1089 | #endif /* defined(unix) */ |
| 1090 | } |
| 1091 | \f |
| 1092 | /* |
| 1093 | * These routines decides on what the mode should be (based on the values |
| 1094 | * of various global variables). |
| 1095 | */ |
| 1096 | |
| 1097 | |
| 1098 | static |
| 1099 | getconnmode() |
| 1100 | { |
| 1101 | static char newmode[16] = |
| 1102 | { 4, 5, 3, 3, 2, 2, 1, 1, 6, 6, 6, 6, 6, 6, 6, 6 }; |
| 1103 | int modeindex = 0; |
| 1104 | |
| 1105 | if (dontlecho && (clocks.echotoggle > clocks.modenegotiated)) { |
| 1106 | modeindex += 1; |
| 1107 | } |
| 1108 | if (hisopts[TELOPT_ECHO]) { |
| 1109 | modeindex += 2; |
| 1110 | } |
| 1111 | if (hisopts[TELOPT_SGA]) { |
| 1112 | modeindex += 4; |
| 1113 | } |
| 1114 | if (In3270) { |
| 1115 | modeindex += 8; |
| 1116 | } |
| 1117 | return newmode[modeindex]; |
| 1118 | } |
| 1119 | |
| 1120 | void |
| 1121 | setconnmode() |
| 1122 | { |
| 1123 | mode(getconnmode()); |
| 1124 | } |
| 1125 | |
| 1126 | |
| 1127 | void |
| 1128 | setcommandmode() |
| 1129 | { |
| 1130 | mode(0); |
| 1131 | } |
| 1132 | \f |
| 1133 | static void |
| 1134 | willoption(option, reply) |
| 1135 | int option, reply; |
| 1136 | { |
| 1137 | char *fmt; |
| 1138 | |
| 1139 | switch (option) { |
| 1140 | |
| 1141 | case TELOPT_ECHO: |
| 1142 | # if defined(TN3270) |
| 1143 | /* |
| 1144 | * The following is a pain in the rear-end. |
| 1145 | * Various IBM servers (some versions of Wiscnet, |
| 1146 | * possibly Fibronics/Spartacus, and who knows who |
| 1147 | * else) will NOT allow us to send "DO SGA" too early |
| 1148 | * in the setup proceedings. On the other hand, |
| 1149 | * 4.2 servers (telnetd) won't set SGA correctly. |
| 1150 | * So, we are stuck. Empirically (but, based on |
| 1151 | * a VERY small sample), the IBM servers don't send |
| 1152 | * out anything about ECHO, so we postpone our sending |
| 1153 | * "DO SGA" until we see "WILL ECHO" (which 4.2 servers |
| 1154 | * DO send). |
| 1155 | */ |
| 1156 | { |
| 1157 | if (askedSGA == 0) { |
| 1158 | askedSGA = 1; |
| 1159 | if (!hisopts[TELOPT_SGA]) { |
| 1160 | willoption(TELOPT_SGA, 0); |
| 1161 | } |
| 1162 | } |
| 1163 | } |
| 1164 | /* Fall through */ |
| 1165 | case TELOPT_EOR: |
| 1166 | case TELOPT_BINARY: |
| 1167 | #endif /* defined(TN3270) */ |
| 1168 | case TELOPT_SGA: |
| 1169 | settimer(modenegotiated); |
| 1170 | hisopts[option] = 1; |
| 1171 | fmt = doopt; |
| 1172 | setconnmode(); /* possibly set new tty mode */ |
| 1173 | break; |
| 1174 | |
| 1175 | case TELOPT_TM: |
| 1176 | return; /* Never reply to TM will's/wont's */ |
| 1177 | |
| 1178 | default: |
| 1179 | fmt = dont; |
| 1180 | break; |
| 1181 | } |
| 1182 | sprintf(nfrontp, fmt, option); |
| 1183 | nfrontp += sizeof (dont) - 2; |
| 1184 | if (reply) |
| 1185 | printoption(">SENT", fmt, option, reply); |
| 1186 | else |
| 1187 | printoption("<SENT", fmt, option, reply); |
| 1188 | } |
| 1189 | |
| 1190 | static void |
| 1191 | wontoption(option, reply) |
| 1192 | int option, reply; |
| 1193 | { |
| 1194 | char *fmt; |
| 1195 | |
| 1196 | switch (option) { |
| 1197 | |
| 1198 | case TELOPT_ECHO: |
| 1199 | case TELOPT_SGA: |
| 1200 | settimer(modenegotiated); |
| 1201 | hisopts[option] = 0; |
| 1202 | fmt = dont; |
| 1203 | setconnmode(); /* Set new tty mode */ |
| 1204 | break; |
| 1205 | |
| 1206 | case TELOPT_TM: |
| 1207 | return; /* Never reply to TM will's/wont's */ |
| 1208 | |
| 1209 | default: |
| 1210 | fmt = dont; |
| 1211 | } |
| 1212 | sprintf(nfrontp, fmt, option); |
| 1213 | nfrontp += sizeof (doopt) - 2; |
| 1214 | if (reply) |
| 1215 | printoption(">SENT", fmt, option, reply); |
| 1216 | else |
| 1217 | printoption("<SENT", fmt, option, reply); |
| 1218 | } |
| 1219 | |
| 1220 | static void |
| 1221 | dooption(option) |
| 1222 | int option; |
| 1223 | { |
| 1224 | char *fmt; |
| 1225 | |
| 1226 | switch (option) { |
| 1227 | |
| 1228 | case TELOPT_TM: |
| 1229 | fmt = will; |
| 1230 | break; |
| 1231 | |
| 1232 | # if defined(TN3270) |
| 1233 | case TELOPT_EOR: |
| 1234 | case TELOPT_BINARY: |
| 1235 | # endif /* defined(TN3270) */ |
| 1236 | case TELOPT_TTYPE: /* terminal type option */ |
| 1237 | case TELOPT_SGA: /* no big deal */ |
| 1238 | fmt = will; |
| 1239 | myopts[option] = 1; |
| 1240 | break; |
| 1241 | |
| 1242 | case TELOPT_ECHO: /* We're never going to echo... */ |
| 1243 | default: |
| 1244 | fmt = wont; |
| 1245 | break; |
| 1246 | } |
| 1247 | sprintf(nfrontp, fmt, option); |
| 1248 | nfrontp += sizeof (doopt) - 2; |
| 1249 | printoption(">SENT", fmt, option, 0); |
| 1250 | } |
| 1251 | |
| 1252 | /* |
| 1253 | * suboption() |
| 1254 | * |
| 1255 | * Look at the sub-option buffer, and try to be helpful to the other |
| 1256 | * side. |
| 1257 | * |
| 1258 | * Currently we recognize: |
| 1259 | * |
| 1260 | * Terminal type, send request. |
| 1261 | */ |
| 1262 | |
| 1263 | static void |
| 1264 | suboption() |
| 1265 | { |
| 1266 | printsub("<", subbuffer, subend-subbuffer+1); |
| 1267 | switch (subbuffer[0]&0xff) { |
| 1268 | case TELOPT_TTYPE: |
| 1269 | if ((subbuffer[1]&0xff) != TELQUAL_SEND) { |
| 1270 | ; |
| 1271 | } else { |
| 1272 | char *name; |
| 1273 | char namebuf[41]; |
| 1274 | extern char *getenv(); |
| 1275 | int len; |
| 1276 | |
| 1277 | #if defined(TN3270) |
| 1278 | /* |
| 1279 | * Try to send a 3270 type terminal name. Decide which one based |
| 1280 | * on the format of our screen, and (in the future) color |
| 1281 | * capaiblities. |
| 1282 | */ |
| 1283 | if ((initscr() != ERR) && /* Initialize curses to get line size */ |
| 1284 | (LINES >= 24) && (COLS >= 80)) { |
| 1285 | Sent3270TerminalType = 1; |
| 1286 | if ((LINES >= 27) && (COLS >= 132)) { |
| 1287 | MaxNumberLines = 27; |
| 1288 | MaxNumberColumns = 132; |
| 1289 | sb_terminal[SBTERMMODEL] = '5'; |
| 1290 | } else if (LINES >= 43) { |
| 1291 | MaxNumberLines = 43; |
| 1292 | MaxNumberColumns = 80; |
| 1293 | sb_terminal[SBTERMMODEL] = '4'; |
| 1294 | } else if (LINES >= 32) { |
| 1295 | MaxNumberLines = 32; |
| 1296 | MaxNumberColumns = 80; |
| 1297 | sb_terminal[SBTERMMODEL] = '3'; |
| 1298 | } else { |
| 1299 | MaxNumberLines = 24; |
| 1300 | MaxNumberColumns = 80; |
| 1301 | sb_terminal[SBTERMMODEL] = '2'; |
| 1302 | } |
| 1303 | NumberLines = 24; /* before we start out... */ |
| 1304 | NumberColumns = 80; |
| 1305 | ScreenSize = NumberLines*NumberColumns; |
| 1306 | if ((MaxNumberLines*MaxNumberColumns) > MAXSCREENSIZE) { |
| 1307 | ExitString(stderr, |
| 1308 | "Programming error: MAXSCREENSIZE too small.\n", 1); |
| 1309 | /*NOTREACHED*/ |
| 1310 | } |
| 1311 | bcopy(sb_terminal, nfrontp, sizeof sb_terminal); |
| 1312 | printsub(">", nfrontp+2, sizeof sb_terminal-2); |
| 1313 | nfrontp += sizeof sb_terminal; |
| 1314 | return; |
| 1315 | } |
| 1316 | #endif /* defined(TN3270) */ |
| 1317 | |
| 1318 | name = getenv("TERM"); |
| 1319 | if ((name == 0) || ((len = strlen(name)) > 40)) { |
| 1320 | name = "UNKNOWN"; |
| 1321 | } |
| 1322 | if ((len + 4+2) < NETROOM()) { |
| 1323 | strcpy(namebuf, name); |
| 1324 | upcase(namebuf); |
| 1325 | sprintf(nfrontp, "%c%c%c%c%s%c%c", IAC, SB, TELOPT_TTYPE, |
| 1326 | TELQUAL_IS, namebuf, IAC, SE); |
| 1327 | printsub(">", nfrontp+2, 4+strlen(namebuf)+2-2-2); |
| 1328 | nfrontp += 4+strlen(namebuf)+2; |
| 1329 | } else { |
| 1330 | ExitString(stderr, "No room in buffer for terminal type.\n", |
| 1331 | 1); |
| 1332 | /*NOTREACHED*/ |
| 1333 | } |
| 1334 | } |
| 1335 | |
| 1336 | default: |
| 1337 | break; |
| 1338 | } |
| 1339 | } |
| 1340 | |
| 1341 | #if defined(TN3270) |
| 1342 | static void |
| 1343 | SetIn3270() |
| 1344 | { |
| 1345 | if (Sent3270TerminalType && myopts[TELOPT_BINARY] |
| 1346 | && hisopts[TELOPT_BINARY]) { |
| 1347 | if (!In3270) { |
| 1348 | In3270 = 1; |
| 1349 | Init3270(); /* Initialize 3270 functions */ |
| 1350 | /* initialize terminal key mapping */ |
| 1351 | InitTerminal(); /* Start terminal going */ |
| 1352 | setconnmode(); |
| 1353 | } |
| 1354 | } else { |
| 1355 | if (In3270) { |
| 1356 | StopScreen(1); |
| 1357 | In3270 = 0; |
| 1358 | setconnmode(); |
| 1359 | } |
| 1360 | } |
| 1361 | } |
| 1362 | #endif /* defined(TN3270) */ |
| 1363 | \f |
| 1364 | |
| 1365 | static void |
| 1366 | telrcv() |
| 1367 | { |
| 1368 | register int c; |
| 1369 | static int telrcv_state = TS_DATA; |
| 1370 | # if defined(TN3270) |
| 1371 | register int Scc; |
| 1372 | register char *Sbp; |
| 1373 | # endif /* defined(TN3270) */ |
| 1374 | |
| 1375 | while ((scc > 0) && (TTYROOM() > 2)) { |
| 1376 | c = *sbp++ & 0xff, scc--; |
| 1377 | switch (telrcv_state) { |
| 1378 | |
| 1379 | case TS_CR: |
| 1380 | telrcv_state = TS_DATA; |
| 1381 | if (c == '\0') { |
| 1382 | break; /* Ignore \0 after CR */ |
| 1383 | } else if (c == '\n') { |
| 1384 | if (hisopts[TELOPT_ECHO] && !crmod) { |
| 1385 | TTYADD(c); |
| 1386 | } |
| 1387 | break; |
| 1388 | } |
| 1389 | /* Else, fall through */ |
| 1390 | |
| 1391 | case TS_DATA: |
| 1392 | if (c == IAC) { |
| 1393 | telrcv_state = TS_IAC; |
| 1394 | continue; |
| 1395 | } |
| 1396 | # if defined(TN3270) |
| 1397 | if (In3270) { |
| 1398 | *Ifrontp++ = c; |
| 1399 | Sbp = sbp; |
| 1400 | Scc = scc; |
| 1401 | while (Scc > 0) { |
| 1402 | c = *Sbp++ & 0377, Scc--; |
| 1403 | if (c == IAC) { |
| 1404 | telrcv_state = TS_IAC; |
| 1405 | break; |
| 1406 | } |
| 1407 | *Ifrontp++ = c; |
| 1408 | } |
| 1409 | sbp = Sbp; |
| 1410 | scc = Scc; |
| 1411 | } else |
| 1412 | # endif /* defined(TN3270) */ |
| 1413 | /* |
| 1414 | * The 'crmod' hack (see following) is needed |
| 1415 | * since we can't * set CRMOD on output only. |
| 1416 | * Machines like MULTICS like to send \r without |
| 1417 | * \n; since we must turn off CRMOD to get proper |
| 1418 | * input, the mapping is done here (sigh). |
| 1419 | */ |
| 1420 | if (c == '\r') { |
| 1421 | if (scc > 0) { |
| 1422 | c = *sbp&0xff; |
| 1423 | if (c == 0) { |
| 1424 | sbp++, scc--; |
| 1425 | /* a "true" CR */ |
| 1426 | TTYADD('\r'); |
| 1427 | } else if (!hisopts[TELOPT_ECHO] && |
| 1428 | (c == '\n')) { |
| 1429 | sbp++, scc--; |
| 1430 | TTYADD('\n'); |
| 1431 | } else { |
| 1432 | TTYADD('\r'); |
| 1433 | if (crmod) { |
| 1434 | TTYADD('\n'); |
| 1435 | } |
| 1436 | } |
| 1437 | } else { |
| 1438 | telrcv_state = TS_CR; |
| 1439 | TTYADD('\r'); |
| 1440 | if (crmod) { |
| 1441 | TTYADD('\n'); |
| 1442 | } |
| 1443 | } |
| 1444 | } else { |
| 1445 | TTYADD(c); |
| 1446 | } |
| 1447 | continue; |
| 1448 | |
| 1449 | case TS_IAC: |
| 1450 | switch (c) { |
| 1451 | |
| 1452 | case WILL: |
| 1453 | telrcv_state = TS_WILL; |
| 1454 | continue; |
| 1455 | |
| 1456 | case WONT: |
| 1457 | telrcv_state = TS_WONT; |
| 1458 | continue; |
| 1459 | |
| 1460 | case DO: |
| 1461 | telrcv_state = TS_DO; |
| 1462 | continue; |
| 1463 | |
| 1464 | case DONT: |
| 1465 | telrcv_state = TS_DONT; |
| 1466 | continue; |
| 1467 | |
| 1468 | case DM: |
| 1469 | /* |
| 1470 | * We may have missed an urgent notification, |
| 1471 | * so make sure we flush whatever is in the |
| 1472 | * buffer currently. |
| 1473 | */ |
| 1474 | SYNCHing = 1; |
| 1475 | ttyflush(); |
| 1476 | SYNCHing = stilloob(net); |
| 1477 | settimer(gotDM); |
| 1478 | break; |
| 1479 | |
| 1480 | case NOP: |
| 1481 | case GA: |
| 1482 | break; |
| 1483 | |
| 1484 | case SB: |
| 1485 | SB_CLEAR(); |
| 1486 | telrcv_state = TS_SB; |
| 1487 | continue; |
| 1488 | |
| 1489 | # if defined(TN3270) |
| 1490 | case EOR: |
| 1491 | if (In3270) { |
| 1492 | Ibackp += DataFromNetwork(Ibackp, Ifrontp-Ibackp, 1); |
| 1493 | if (Ibackp == Ifrontp) { |
| 1494 | Ibackp = Ifrontp = Ibuf; |
| 1495 | ISend = 0; /* should have been! */ |
| 1496 | } else { |
| 1497 | ISend = 1; |
| 1498 | } |
| 1499 | } |
| 1500 | break; |
| 1501 | # endif /* defined(TN3270) */ |
| 1502 | |
| 1503 | case IAC: |
| 1504 | # if !defined(TN3270) |
| 1505 | TTYADD(IAC); |
| 1506 | # else /* !defined(TN3270) */ |
| 1507 | if (In3270) { |
| 1508 | *Ifrontp++ = IAC; |
| 1509 | } else { |
| 1510 | TTYADD(IAC); |
| 1511 | } |
| 1512 | # endif /* !defined(TN3270) */ |
| 1513 | break; |
| 1514 | |
| 1515 | default: |
| 1516 | break; |
| 1517 | } |
| 1518 | telrcv_state = TS_DATA; |
| 1519 | continue; |
| 1520 | |
| 1521 | case TS_WILL: |
| 1522 | printoption(">RCVD", will, c, !hisopts[c]); |
| 1523 | if (c == TELOPT_TM) { |
| 1524 | if (flushout) { |
| 1525 | flushout = 0; |
| 1526 | } |
| 1527 | } else if (!hisopts[c]) { |
| 1528 | willoption(c, 1); |
| 1529 | } |
| 1530 | SetIn3270(); |
| 1531 | telrcv_state = TS_DATA; |
| 1532 | continue; |
| 1533 | |
| 1534 | case TS_WONT: |
| 1535 | printoption(">RCVD", wont, c, hisopts[c]); |
| 1536 | if (c == TELOPT_TM) { |
| 1537 | if (flushout) { |
| 1538 | flushout = 0; |
| 1539 | } |
| 1540 | } else if (hisopts[c]) { |
| 1541 | wontoption(c, 1); |
| 1542 | } |
| 1543 | SetIn3270(); |
| 1544 | telrcv_state = TS_DATA; |
| 1545 | continue; |
| 1546 | |
| 1547 | case TS_DO: |
| 1548 | printoption(">RCVD", doopt, c, !myopts[c]); |
| 1549 | if (!myopts[c]) |
| 1550 | dooption(c); |
| 1551 | SetIn3270(); |
| 1552 | telrcv_state = TS_DATA; |
| 1553 | continue; |
| 1554 | |
| 1555 | case TS_DONT: |
| 1556 | printoption(">RCVD", dont, c, myopts[c]); |
| 1557 | if (myopts[c]) { |
| 1558 | myopts[c] = 0; |
| 1559 | sprintf(nfrontp, wont, c); |
| 1560 | nfrontp += sizeof (wont) - 2; |
| 1561 | flushline = 1; |
| 1562 | setconnmode(); /* set new tty mode (maybe) */ |
| 1563 | printoption(">SENT", wont, c, 0); |
| 1564 | } |
| 1565 | SetIn3270(); |
| 1566 | telrcv_state = TS_DATA; |
| 1567 | continue; |
| 1568 | |
| 1569 | case TS_SB: |
| 1570 | if (c == IAC) { |
| 1571 | telrcv_state = TS_SE; |
| 1572 | } else { |
| 1573 | SB_ACCUM(c); |
| 1574 | } |
| 1575 | continue; |
| 1576 | |
| 1577 | case TS_SE: |
| 1578 | if (c != SE) { |
| 1579 | if (c != IAC) { |
| 1580 | SB_ACCUM(IAC); |
| 1581 | } |
| 1582 | SB_ACCUM(c); |
| 1583 | telrcv_state = TS_SB; |
| 1584 | } else { |
| 1585 | SB_TERM(); |
| 1586 | suboption(); /* handle sub-option */ |
| 1587 | SetIn3270(); |
| 1588 | telrcv_state = TS_DATA; |
| 1589 | } |
| 1590 | } |
| 1591 | } |
| 1592 | } |
| 1593 | \f |
| 1594 | #if defined(TN3270) |
| 1595 | |
| 1596 | /* |
| 1597 | * The following routines are places where the various tn3270 |
| 1598 | * routines make calls into telnet.c. |
| 1599 | */ |
| 1600 | |
| 1601 | /* TtyChars() - returns the number of characters in the TTY buffer */ |
| 1602 | TtyChars() |
| 1603 | { |
| 1604 | return(tfrontp-tbackp); |
| 1605 | } |
| 1606 | |
| 1607 | /* |
| 1608 | * DataToNetwork - queue up some data to go to network. If "done" is set, |
| 1609 | * then when last byte is queued, we add on an IAC EOR sequence (so, |
| 1610 | * don't call us with "done" until you want that done...) |
| 1611 | * |
| 1612 | * We actually do send all the data to the network buffer, since our |
| 1613 | * only client needs for us to do that. |
| 1614 | */ |
| 1615 | |
| 1616 | int |
| 1617 | DataToNetwork(buffer, count, done) |
| 1618 | register char *buffer; /* where the data is */ |
| 1619 | register int count; /* how much to send */ |
| 1620 | int done; /* is this the last of a logical block */ |
| 1621 | { |
| 1622 | register int c; |
| 1623 | int origCount; |
| 1624 | fd_set o; |
| 1625 | |
| 1626 | origCount = count; |
| 1627 | FD_ZERO(&o); |
| 1628 | |
| 1629 | while (count) { |
| 1630 | if ((netobuf+sizeof netobuf - nfrontp) < 6) { |
| 1631 | netflush(); |
| 1632 | while ((netobuf+sizeof netobuf - nfrontp) < 6) { |
| 1633 | FD_SET(net, &o); |
| 1634 | (void) select(net+1, (fd_set *) 0, &o, (fd_set *) 0, |
| 1635 | (struct timeval *) 0); |
| 1636 | netflush(); |
| 1637 | } |
| 1638 | } |
| 1639 | c = *buffer++; |
| 1640 | count--; |
| 1641 | if (c == IAC) { |
| 1642 | *nfrontp++ = IAC; |
| 1643 | *nfrontp++ = IAC; |
| 1644 | } else { |
| 1645 | *nfrontp++ = c; |
| 1646 | } |
| 1647 | } |
| 1648 | |
| 1649 | if (done && !count) { |
| 1650 | *nfrontp++ = IAC; |
| 1651 | *nfrontp++ = EOR; |
| 1652 | netflush(); /* try to move along as quickly as ... */ |
| 1653 | } |
| 1654 | return(origCount - count); |
| 1655 | } |
| 1656 | |
| 1657 | /* DataToTerminal - queue up some data to go to terminal. */ |
| 1658 | |
| 1659 | int |
| 1660 | DataToTerminal(buffer, count) |
| 1661 | register char *buffer; /* where the data is */ |
| 1662 | register int count; /* how much to send */ |
| 1663 | { |
| 1664 | int origCount; |
| 1665 | fd_set o; |
| 1666 | |
| 1667 | origCount = count; |
| 1668 | FD_ZERO(&o); |
| 1669 | |
| 1670 | while (count) { |
| 1671 | if (tfrontp >= ttyobuf+sizeof ttyobuf) { |
| 1672 | ttyflush(); |
| 1673 | while (tfrontp >= ttyobuf+sizeof ttyobuf) { |
| 1674 | FD_SET(tout, &o); |
| 1675 | (void) select(tout+1, (fd_set *) 0, &o, (fd_set *) 0, |
| 1676 | (struct timeval *) 0); |
| 1677 | ttyflush(); |
| 1678 | } |
| 1679 | } |
| 1680 | *tfrontp++ = *buffer++; |
| 1681 | count--; |
| 1682 | } |
| 1683 | return(origCount - count); |
| 1684 | } |
| 1685 | |
| 1686 | /* EmptyTerminal - called to make sure that the terminal buffer is empty. |
| 1687 | * Note that we consider the buffer to run all the |
| 1688 | * way to the kernel (thus the select). |
| 1689 | */ |
| 1690 | |
| 1691 | void |
| 1692 | EmptyTerminal() |
| 1693 | { |
| 1694 | fd_set o; |
| 1695 | |
| 1696 | FD_ZERO(&o); |
| 1697 | |
| 1698 | if (tfrontp == tbackp) { |
| 1699 | FD_SET(tout, &o); |
| 1700 | (void) select(tout+1, (int *) 0, &o, (int *) 0, |
| 1701 | (struct timeval *) 0); /* wait for TTLOWAT */ |
| 1702 | } else { |
| 1703 | while (tfrontp != tbackp) { |
| 1704 | ttyflush(); |
| 1705 | FD_SET(tout, &o); |
| 1706 | (void) select(tout+1, (int *) 0, &o, (int *) 0, |
| 1707 | (struct timeval *) 0); /* wait for TTLOWAT */ |
| 1708 | } |
| 1709 | } |
| 1710 | } |
| 1711 | |
| 1712 | /* |
| 1713 | * Push3270 - Try to send data along the 3270 output (to screen) direction. |
| 1714 | */ |
| 1715 | |
| 1716 | static int |
| 1717 | Push3270() |
| 1718 | { |
| 1719 | int save = scc; |
| 1720 | |
| 1721 | if (scc) { |
| 1722 | if (Ifrontp+scc > Ibuf+sizeof Ibuf) { |
| 1723 | if (Ibackp != Ibuf) { |
| 1724 | bcopy(Ibackp, Ibuf, Ifrontp-Ibackp); |
| 1725 | Ifrontp -= (Ibackp-Ibuf); |
| 1726 | Ibackp = Ibuf; |
| 1727 | } |
| 1728 | } |
| 1729 | if (Ifrontp+scc < Ibuf+sizeof Ibuf) { |
| 1730 | telrcv(); |
| 1731 | } |
| 1732 | } |
| 1733 | return save != scc; |
| 1734 | } |
| 1735 | |
| 1736 | |
| 1737 | /* |
| 1738 | * Finish3270 - get the last dregs of 3270 data out to the terminal |
| 1739 | * before quitting. |
| 1740 | */ |
| 1741 | |
| 1742 | static void |
| 1743 | Finish3270() |
| 1744 | { |
| 1745 | while (Push3270() || !DoTerminalOutput()) { |
| 1746 | ; |
| 1747 | } |
| 1748 | } |
| 1749 | |
| 1750 | |
| 1751 | |
| 1752 | /* StringToTerminal - output a null terminated string to the terminal */ |
| 1753 | |
| 1754 | void |
| 1755 | StringToTerminal(s) |
| 1756 | char *s; |
| 1757 | { |
| 1758 | int count; |
| 1759 | |
| 1760 | count = strlen(s); |
| 1761 | if (count) { |
| 1762 | (void) DataToTerminal(s, count); /* we know it always goes... */ |
| 1763 | } |
| 1764 | } |
| 1765 | |
| 1766 | |
| 1767 | #if defined(TN3270) && ((!defined(NOT43)) || defined(PUTCHAR)) |
| 1768 | /* _putchar - output a single character to the terminal. This name is so that |
| 1769 | * curses(3x) can call us to send out data. |
| 1770 | */ |
| 1771 | |
| 1772 | void |
| 1773 | _putchar(c) |
| 1774 | char c; |
| 1775 | { |
| 1776 | if (tfrontp >= ttyobuf+sizeof ttyobuf) { |
| 1777 | (void) DataToTerminal(&c, 1); |
| 1778 | } else { |
| 1779 | *tfrontp++ = c; /* optimize if possible. */ |
| 1780 | } |
| 1781 | } |
| 1782 | #endif /* defined(TN3270) && ((!defined(NOT43)) || defined(PUTCHAR)) */ |
| 1783 | \f |
| 1784 | static void |
| 1785 | SetForExit() |
| 1786 | { |
| 1787 | setconnmode(); |
| 1788 | if (In3270) { |
| 1789 | Finish3270(); |
| 1790 | } |
| 1791 | setcommandmode(); |
| 1792 | fflush(stdout); |
| 1793 | fflush(stderr); |
| 1794 | if (In3270) { |
| 1795 | StopScreen(1); |
| 1796 | } |
| 1797 | setconnmode(); |
| 1798 | setcommandmode(); |
| 1799 | } |
| 1800 | |
| 1801 | static void |
| 1802 | Exit(returnCode) |
| 1803 | int returnCode; |
| 1804 | { |
| 1805 | SetForExit(); |
| 1806 | exit(returnCode); |
| 1807 | } |
| 1808 | |
| 1809 | void |
| 1810 | ExitString(file, string, returnCode) |
| 1811 | FILE *file; |
| 1812 | char *string; |
| 1813 | int returnCode; |
| 1814 | { |
| 1815 | SetForExit(); |
| 1816 | fwrite(string, 1, strlen(string), file); |
| 1817 | exit(returnCode); |
| 1818 | } |
| 1819 | |
| 1820 | void |
| 1821 | ExitPerror(string, returnCode) |
| 1822 | char *string; |
| 1823 | int returnCode; |
| 1824 | { |
| 1825 | SetForExit(); |
| 1826 | perror(string); |
| 1827 | exit(returnCode); |
| 1828 | } |
| 1829 | |
| 1830 | #endif /* defined(TN3270) */ |
| 1831 | \f |
| 1832 | static |
| 1833 | Scheduler(block) |
| 1834 | int block; /* should we block in the select ? */ |
| 1835 | { |
| 1836 | register int c; |
| 1837 | /* One wants to be a bit careful about setting returnValue |
| 1838 | * to one, since a one implies we did some useful work, |
| 1839 | * and therefore probably won't be called to block next |
| 1840 | * time (TN3270 mode only). |
| 1841 | */ |
| 1842 | int returnValue = 0; |
| 1843 | static struct timeval TimeValue = { 0 }; |
| 1844 | |
| 1845 | if (scc < 0 && tcc < 0) { |
| 1846 | return -1; |
| 1847 | } |
| 1848 | |
| 1849 | if ((!MODE_LINE(globalmode) || flushline) && NETBYTES()) { |
| 1850 | FD_SET(net, &obits); |
| 1851 | } |
| 1852 | if (TTYBYTES()) { |
| 1853 | FD_SET(tout, &obits); |
| 1854 | } |
| 1855 | if ((tcc == 0) && NETROOM()) { |
| 1856 | FD_SET(tin, &ibits); |
| 1857 | } |
| 1858 | # if !defined(TN3270) |
| 1859 | if (TTYROOM()) { |
| 1860 | FD_SET(net, &ibits); |
| 1861 | } |
| 1862 | # else /* !defined(TN3270) */ |
| 1863 | if (!ISend && TTYROOM()) { |
| 1864 | FD_SET(net, &ibits); |
| 1865 | } |
| 1866 | # endif /* !defined(TN3270) */ |
| 1867 | if (!SYNCHing) { |
| 1868 | FD_SET(net, &xbits); |
| 1869 | } |
| 1870 | # if defined(TN3270) && defined(unix) |
| 1871 | if (HaveInput) { |
| 1872 | HaveInput = 0; |
| 1873 | signal(SIGIO, inputAvailable); |
| 1874 | } |
| 1875 | #endif /* defined(TN3270) && defined(unix) */ |
| 1876 | if ((c = select(16, &ibits, &obits, &xbits, |
| 1877 | block? (struct timeval *)0 : &TimeValue)) < 1) { |
| 1878 | if (c == -1) { |
| 1879 | /* |
| 1880 | * we can get EINTR if we are in line mode, |
| 1881 | * and the user does an escape (TSTP), or |
| 1882 | * some other signal generator. |
| 1883 | */ |
| 1884 | if (errno == EINTR) { |
| 1885 | return 0; |
| 1886 | } |
| 1887 | # if defined(TN3270) |
| 1888 | /* |
| 1889 | * we can get EBADF if we were in transparent |
| 1890 | * mode, and the transcom process died. |
| 1891 | */ |
| 1892 | if (errno == EBADF) { |
| 1893 | /* |
| 1894 | * zero the bits (even though kernel does it) |
| 1895 | * to make sure we are selecting on the right |
| 1896 | * ones. |
| 1897 | */ |
| 1898 | FD_ZERO(&ibits); |
| 1899 | FD_ZERO(&obits); |
| 1900 | FD_ZERO(&xbits); |
| 1901 | return 0; |
| 1902 | } |
| 1903 | # endif /* defined(TN3270) */ |
| 1904 | /* I don't like this, does it ever happen? */ |
| 1905 | printf("sleep(5) from telnet, after select\r\n"); |
| 1906 | #if defined(unix) |
| 1907 | sleep(5); |
| 1908 | #endif /* defined(unix) */ |
| 1909 | } |
| 1910 | return 0; |
| 1911 | } |
| 1912 | |
| 1913 | /* |
| 1914 | * Any urgent data? |
| 1915 | */ |
| 1916 | if (FD_ISSET(net, &xbits)) { |
| 1917 | FD_CLR(net, &xbits); |
| 1918 | SYNCHing = 1; |
| 1919 | ttyflush(); /* flush already enqueued data */ |
| 1920 | } |
| 1921 | |
| 1922 | /* |
| 1923 | * Something to read from the network... |
| 1924 | */ |
| 1925 | if (FD_ISSET(net, &ibits)) { |
| 1926 | int canread; |
| 1927 | |
| 1928 | FD_CLR(net, &ibits); |
| 1929 | if (scc == 0) { |
| 1930 | sbp = sibuf; |
| 1931 | } |
| 1932 | canread = sibuf + sizeof sibuf - (sbp+scc); |
| 1933 | #if !defined(SO_OOBINLINE) |
| 1934 | /* |
| 1935 | * In 4.2 (and some early 4.3) systems, the |
| 1936 | * OOB indication and data handling in the kernel |
| 1937 | * is such that if two separate TCP Urgent requests |
| 1938 | * come in, one byte of TCP data will be overlaid. |
| 1939 | * This is fatal for Telnet, but we try to live |
| 1940 | * with it. |
| 1941 | * |
| 1942 | * In addition, in 4.2 (and...), a special protocol |
| 1943 | * is needed to pick up the TCP Urgent data in |
| 1944 | * the correct sequence. |
| 1945 | * |
| 1946 | * What we do is: if we think we are in urgent |
| 1947 | * mode, we look to see if we are "at the mark". |
| 1948 | * If we are, we do an OOB receive. If we run |
| 1949 | * this twice, we will do the OOB receive twice, |
| 1950 | * but the second will fail, since the second |
| 1951 | * time we were "at the mark", but there wasn't |
| 1952 | * any data there (the kernel doesn't reset |
| 1953 | * "at the mark" until we do a normal read). |
| 1954 | * Once we've read the OOB data, we go ahead |
| 1955 | * and do normal reads. |
| 1956 | * |
| 1957 | * There is also another problem, which is that |
| 1958 | * since the OOB byte we read doesn't put us |
| 1959 | * out of OOB state, and since that byte is most |
| 1960 | * likely the TELNET DM (data mark), we would |
| 1961 | * stay in the TELNET SYNCH (SYNCHing) state. |
| 1962 | * So, clocks to the rescue. If we've "just" |
| 1963 | * received a DM, then we test for the |
| 1964 | * presence of OOB data when the receive OOB |
| 1965 | * fails (and AFTER we did the normal mode read |
| 1966 | * to clear "at the mark"). |
| 1967 | */ |
| 1968 | if (SYNCHing) { |
| 1969 | int atmark; |
| 1970 | |
| 1971 | ioctl(net, SIOCATMARK, (char *)&atmark); |
| 1972 | if (atmark) { |
| 1973 | c = recv(net, sbp+scc, canread, MSG_OOB); |
| 1974 | if ((c == -1) && (errno == EINVAL)) { |
| 1975 | c = read(net, sbp+scc, canread); |
| 1976 | if (clocks.didnetreceive < clocks.gotDM) { |
| 1977 | SYNCHing = stilloob(net); |
| 1978 | } |
| 1979 | } |
| 1980 | } else { |
| 1981 | c = read(net, sbp+scc, canread); |
| 1982 | } |
| 1983 | } else { |
| 1984 | c = read(net, sbp+scc, canread); |
| 1985 | } |
| 1986 | settimer(didnetreceive); |
| 1987 | #else /* !defined(SO_OOBINLINE) */ |
| 1988 | c = read(net, sbp+scc, canread); |
| 1989 | #endif /* !defined(SO_OOBINLINE) */ |
| 1990 | if (c < 0 && errno == EWOULDBLOCK) { |
| 1991 | c = 0; |
| 1992 | } else if (c <= 0) { |
| 1993 | return -1; |
| 1994 | } |
| 1995 | if (netdata) { |
| 1996 | Dump('<', sbp+scc, c); |
| 1997 | } |
| 1998 | scc += c; |
| 1999 | returnValue = 1; |
| 2000 | } |
| 2001 | |
| 2002 | /* |
| 2003 | * Something to read from the tty... |
| 2004 | */ |
| 2005 | if (FD_ISSET(tin, &ibits)) { |
| 2006 | FD_CLR(tin, &ibits); |
| 2007 | if (tcc == 0) { |
| 2008 | tbp = tibuf; /* nothing left, reset */ |
| 2009 | } |
| 2010 | c = read(tin, tbp, tibuf+sizeof tibuf - tbp); |
| 2011 | if (c < 0 && errno == EWOULDBLOCK) { |
| 2012 | c = 0; |
| 2013 | } else { |
| 2014 | /* EOF detection for line mode!!!! */ |
| 2015 | if (c == 0 && MODE_LOCAL_CHARS(globalmode)) { |
| 2016 | /* must be an EOF... */ |
| 2017 | *tbp = ntc.t_eofc; |
| 2018 | c = 1; |
| 2019 | } |
| 2020 | if (c <= 0) { |
| 2021 | tcc = c; |
| 2022 | return -1; |
| 2023 | } |
| 2024 | } |
| 2025 | tcc += c; |
| 2026 | returnValue = 1; /* did something useful */ |
| 2027 | } |
| 2028 | |
| 2029 | # if defined(TN3270) |
| 2030 | if (tcc > 0) { |
| 2031 | if (In3270) { |
| 2032 | c = DataFromTerminal(tbp, tcc); |
| 2033 | if (c) { |
| 2034 | returnValue = 1; |
| 2035 | } |
| 2036 | tcc -= c; |
| 2037 | tbp += c; |
| 2038 | } else { |
| 2039 | # endif /* defined(TN3270) */ |
| 2040 | returnValue = 1; |
| 2041 | while (tcc > 0) { |
| 2042 | register int sc; |
| 2043 | |
| 2044 | if (NETROOM() < 2) { |
| 2045 | flushline = 1; |
| 2046 | break; |
| 2047 | } |
| 2048 | c = *tbp++ & 0xff, sc = strip(c), tcc--; |
| 2049 | if (sc == escape) { |
| 2050 | command(0); |
| 2051 | tcc = 0; |
| 2052 | flushline = 1; |
| 2053 | break; |
| 2054 | } else if (MODE_LINE(globalmode) && (sc == echoc)) { |
| 2055 | if (tcc > 0 && strip(*tbp) == echoc) { |
| 2056 | tbp++; |
| 2057 | tcc--; |
| 2058 | } else { |
| 2059 | dontlecho = !dontlecho; |
| 2060 | settimer(echotoggle); |
| 2061 | setconnmode(); |
| 2062 | tcc = 0; |
| 2063 | flushline = 1; |
| 2064 | break; |
| 2065 | } |
| 2066 | } |
| 2067 | if (localchars) { |
| 2068 | if (sc == ntc.t_intrc) { |
| 2069 | intp(); |
| 2070 | break; |
| 2071 | } else if (sc == ntc.t_quitc) { |
| 2072 | sendbrk(); |
| 2073 | break; |
| 2074 | } else if (sc == nltc.t_flushc) { |
| 2075 | NET2ADD(IAC, AO); |
| 2076 | if (autoflush) { |
| 2077 | doflush(); |
| 2078 | } |
| 2079 | break; |
| 2080 | } else if (MODE_LOCAL_CHARS(globalmode)) { |
| 2081 | ; |
| 2082 | } else if (sc == nttyb.sg_kill) { |
| 2083 | NET2ADD(IAC, EL); |
| 2084 | break; |
| 2085 | } else if (sc == nttyb.sg_erase) { |
| 2086 | NET2ADD(IAC, EC); |
| 2087 | break; |
| 2088 | } |
| 2089 | } |
| 2090 | switch (c) { |
| 2091 | case '\n': |
| 2092 | /* |
| 2093 | * If we are in CRMOD mode (\r ==> \n) |
| 2094 | * on our local machine, then probably |
| 2095 | * a newline (unix) is CRLF (TELNET). |
| 2096 | */ |
| 2097 | if (MODE_LOCAL_CHARS(globalmode)) { |
| 2098 | NETADD('\r'); |
| 2099 | } |
| 2100 | NETADD('\n'); |
| 2101 | flushline = 1; |
| 2102 | break; |
| 2103 | case '\r': |
| 2104 | NET2ADD('\r', '\0'); |
| 2105 | flushline = 1; |
| 2106 | break; |
| 2107 | case IAC: |
| 2108 | NET2ADD(IAC, IAC); |
| 2109 | break; |
| 2110 | default: |
| 2111 | NETADD(c); |
| 2112 | break; |
| 2113 | } |
| 2114 | } |
| 2115 | # if defined(TN3270) |
| 2116 | } |
| 2117 | } |
| 2118 | # endif /* defined(TN3270) */ |
| 2119 | |
| 2120 | if ((!MODE_LINE(globalmode) || flushline) && |
| 2121 | FD_ISSET(net, &obits) && (NETBYTES() > 0)) { |
| 2122 | FD_CLR(net, &obits); |
| 2123 | returnValue = netflush(); |
| 2124 | } |
| 2125 | if (scc > 0) { |
| 2126 | # if !defined(TN3270) |
| 2127 | telrcv(); |
| 2128 | returnValue = 1; |
| 2129 | # else /* !defined(TN3270) */ |
| 2130 | returnValue = Push3270(); |
| 2131 | # endif /* !defined(TN3270) */ |
| 2132 | } |
| 2133 | if (FD_ISSET(tout, &obits) && (TTYBYTES() > 0)) { |
| 2134 | FD_CLR(tout, &obits); |
| 2135 | returnValue = ttyflush(); |
| 2136 | } |
| 2137 | return returnValue; |
| 2138 | } |
| 2139 | \f |
| 2140 | /* |
| 2141 | * Select from tty and network... |
| 2142 | */ |
| 2143 | static void |
| 2144 | telnet() |
| 2145 | { |
| 2146 | int on = 1; |
| 2147 | #if defined(TN3270) && defined(unix) |
| 2148 | int myPid; |
| 2149 | #endif /* defined(TN3270) */ |
| 2150 | |
| 2151 | tout = fileno(stdout); |
| 2152 | tin = fileno(stdin); |
| 2153 | setconnmode(); |
| 2154 | scc = 0; |
| 2155 | tcc = 0; |
| 2156 | FD_ZERO(&ibits); |
| 2157 | FD_ZERO(&obits); |
| 2158 | FD_ZERO(&xbits); |
| 2159 | |
| 2160 | ioctl(net, FIONBIO, (char *)&on); |
| 2161 | |
| 2162 | #if defined(TN3270) |
| 2163 | #if !defined(DEBUG) /* DBX can't handle! */ |
| 2164 | ioctl(net, FIOASYNC, (char *)&on); /* hear about input */ |
| 2165 | #endif /* !defined(DEBUG) */ |
| 2166 | |
| 2167 | #if defined(unix) |
| 2168 | myPid = getpid(); |
| 2169 | #if defined(NOT43) |
| 2170 | myPid = -myPid; |
| 2171 | #endif /* defined(NOT43) */ |
| 2172 | ioctl(net, SIOCSPGRP, (char *)&myPid); /* set my pid */ |
| 2173 | #endif /* defined(unix) */ |
| 2174 | |
| 2175 | #endif /* defined(TN3270) */ |
| 2176 | |
| 2177 | #if defined(SO_OOBINLINE) |
| 2178 | setsockopt(net, SOL_SOCKET, SO_OOBINLINE, &on, sizeof on); |
| 2179 | #endif /* defined(SO_OOBINLINE) */ |
| 2180 | |
| 2181 | # if !defined(TN3270) |
| 2182 | if (telnetport) { |
| 2183 | if (!hisopts[TELOPT_SGA]) { |
| 2184 | willoption(TELOPT_SGA, 0); |
| 2185 | } |
| 2186 | if (!myopts[TELOPT_TTYPE]) { |
| 2187 | dooption(TELOPT_TTYPE, 0); |
| 2188 | } |
| 2189 | } |
| 2190 | # endif /* !defined(TN3270) */ |
| 2191 | |
| 2192 | # if !defined(TN3270) |
| 2193 | for (;;) { |
| 2194 | if (Scheduler(1) == -1) { |
| 2195 | setcommandmode(); |
| 2196 | return; |
| 2197 | } |
| 2198 | } |
| 2199 | # else /* !defined(TN3270) */ |
| 2200 | for (;;) { |
| 2201 | int schedValue; |
| 2202 | |
| 2203 | while (!In3270) { |
| 2204 | if (Scheduler(1) == -1) { |
| 2205 | setcommandmode(); |
| 2206 | return; |
| 2207 | } |
| 2208 | } |
| 2209 | |
| 2210 | while ((schedValue = Scheduler(0)) != 0) { |
| 2211 | if (schedValue == -1) { |
| 2212 | setcommandmode(); |
| 2213 | return; |
| 2214 | } |
| 2215 | } |
| 2216 | /* If there is data waiting to go out to terminal, don't |
| 2217 | * schedule any more data for the terminal. |
| 2218 | */ |
| 2219 | if (tfrontp-tbackp) { |
| 2220 | schedValue = 1; |
| 2221 | } else { |
| 2222 | schedValue = DoTerminalOutput(); |
| 2223 | } |
| 2224 | if (schedValue) { |
| 2225 | if (Scheduler(1) == -1) { |
| 2226 | setcommandmode(); |
| 2227 | return; |
| 2228 | } |
| 2229 | } |
| 2230 | } |
| 2231 | # endif /* !defined(TN3270) */ |
| 2232 | } |
| 2233 | \f |
| 2234 | /* |
| 2235 | * The following are data structures and routines for |
| 2236 | * the "send" command. |
| 2237 | * |
| 2238 | */ |
| 2239 | |
| 2240 | struct sendlist { |
| 2241 | char *name; /* How user refers to it (case independent) */ |
| 2242 | int what; /* Character to be sent (<0 ==> special) */ |
| 2243 | char *help; /* Help information (0 ==> no help) */ |
| 2244 | #if defined(NOT43) |
| 2245 | int (*routine)(); /* Routine to perform (for special ops) */ |
| 2246 | #else /* defined(NOT43) */ |
| 2247 | void (*routine)(); /* Routine to perform (for special ops) */ |
| 2248 | #endif /* defined(NOT43) */ |
| 2249 | }; |
| 2250 | \f |
| 2251 | #define SENDQUESTION -1 |
| 2252 | #define SENDESCAPE -3 |
| 2253 | |
| 2254 | static struct sendlist Sendlist[] = { |
| 2255 | { "ao", AO, "Send Telnet Abort output" }, |
| 2256 | { "ayt", AYT, "Send Telnet 'Are You There'" }, |
| 2257 | { "brk", BREAK, "Send Telnet Break" }, |
| 2258 | { "ec", EC, "Send Telnet Erase Character" }, |
| 2259 | { "el", EL, "Send Telnet Erase Line" }, |
| 2260 | { "escape", SENDESCAPE, "Send current escape character" }, |
| 2261 | { "ga", GA, "Send Telnet 'Go Ahead' sequence" }, |
| 2262 | { "ip", IP, "Send Telnet Interrupt Process" }, |
| 2263 | { "nop", NOP, "Send Telnet 'No operation'" }, |
| 2264 | { "synch", SYNCH, "Perform Telnet 'Synch operation'", dosynch }, |
| 2265 | { "?", SENDQUESTION, "Display send options" }, |
| 2266 | { 0 } |
| 2267 | }; |
| 2268 | |
| 2269 | static struct sendlist Sendlist2[] = { /* some synonyms */ |
| 2270 | { "break", BREAK, 0 }, |
| 2271 | |
| 2272 | { "intp", IP, 0 }, |
| 2273 | { "interrupt", IP, 0 }, |
| 2274 | { "intr", IP, 0 }, |
| 2275 | |
| 2276 | { "help", SENDQUESTION, 0 }, |
| 2277 | |
| 2278 | { 0 } |
| 2279 | }; |
| 2280 | |
| 2281 | static char ** |
| 2282 | getnextsend(name) |
| 2283 | char *name; |
| 2284 | { |
| 2285 | struct sendlist *c = (struct sendlist *) name; |
| 2286 | |
| 2287 | return (char **) (c+1); |
| 2288 | } |
| 2289 | |
| 2290 | static struct sendlist * |
| 2291 | getsend(name) |
| 2292 | char *name; |
| 2293 | { |
| 2294 | struct sendlist *sl; |
| 2295 | |
| 2296 | if ((sl = (struct sendlist *) |
| 2297 | genget(name, (char **) Sendlist, getnextsend)) != 0) { |
| 2298 | return sl; |
| 2299 | } else { |
| 2300 | return (struct sendlist *) |
| 2301 | genget(name, (char **) Sendlist2, getnextsend); |
| 2302 | } |
| 2303 | } |
| 2304 | |
| 2305 | static |
| 2306 | sendcmd(argc, argv) |
| 2307 | int argc; |
| 2308 | char **argv; |
| 2309 | { |
| 2310 | int what; /* what we are sending this time */ |
| 2311 | int count; /* how many bytes we are going to need to send */ |
| 2312 | int i; |
| 2313 | int question = 0; /* was at least one argument a question */ |
| 2314 | struct sendlist *s; /* pointer to current command */ |
| 2315 | |
| 2316 | if (argc < 2) { |
| 2317 | printf("need at least one argument for 'send' command\n"); |
| 2318 | printf("'send ?' for help\n"); |
| 2319 | return 0; |
| 2320 | } |
| 2321 | /* |
| 2322 | * First, validate all the send arguments. |
| 2323 | * In addition, we see how much space we are going to need, and |
| 2324 | * whether or not we will be doing a "SYNCH" operation (which |
| 2325 | * flushes the network queue). |
| 2326 | */ |
| 2327 | count = 0; |
| 2328 | for (i = 1; i < argc; i++) { |
| 2329 | s = getsend(argv[i]); |
| 2330 | if (s == 0) { |
| 2331 | printf("Unknown send argument '%s'\n'send ?' for help.\n", |
| 2332 | argv[i]); |
| 2333 | return 0; |
| 2334 | } else if (s == Ambiguous(struct sendlist *)) { |
| 2335 | printf("Ambiguous send argument '%s'\n'send ?' for help.\n", |
| 2336 | argv[i]); |
| 2337 | return 0; |
| 2338 | } |
| 2339 | switch (s->what) { |
| 2340 | case SENDQUESTION: |
| 2341 | break; |
| 2342 | case SENDESCAPE: |
| 2343 | count += 1; |
| 2344 | break; |
| 2345 | case SYNCH: |
| 2346 | count += 2; |
| 2347 | break; |
| 2348 | default: |
| 2349 | count += 2; |
| 2350 | break; |
| 2351 | } |
| 2352 | } |
| 2353 | /* Now, do we have enough room? */ |
| 2354 | if (NETROOM() < count) { |
| 2355 | printf("There is not enough room in the buffer TO the network\n"); |
| 2356 | printf("to process your request. Nothing will be done.\n"); |
| 2357 | printf("('send synch' will throw away most data in the network\n"); |
| 2358 | printf("buffer, if this might help.)\n"); |
| 2359 | return 0; |
| 2360 | } |
| 2361 | /* OK, they are all OK, now go through again and actually send */ |
| 2362 | for (i = 1; i < argc; i++) { |
| 2363 | if ((s = getsend(argv[i])) == 0) { |
| 2364 | fprintf(stderr, "Telnet 'send' error - argument disappeared!\n"); |
| 2365 | quit(); |
| 2366 | /*NOTREACHED*/ |
| 2367 | } |
| 2368 | if (s->routine) { |
| 2369 | (*s->routine)(s); |
| 2370 | } else { |
| 2371 | switch (what = s->what) { |
| 2372 | case SYNCH: |
| 2373 | dosynch(); |
| 2374 | break; |
| 2375 | case SENDQUESTION: |
| 2376 | for (s = Sendlist; s->name; s++) { |
| 2377 | if (s->help) { |
| 2378 | printf(s->name); |
| 2379 | if (s->help) { |
| 2380 | printf("\t%s", s->help); |
| 2381 | } |
| 2382 | printf("\n"); |
| 2383 | } |
| 2384 | } |
| 2385 | question = 1; |
| 2386 | break; |
| 2387 | case SENDESCAPE: |
| 2388 | NETADD(escape); |
| 2389 | break; |
| 2390 | default: |
| 2391 | NET2ADD(IAC, what); |
| 2392 | break; |
| 2393 | } |
| 2394 | } |
| 2395 | } |
| 2396 | return !question; |
| 2397 | } |
| 2398 | \f |
| 2399 | /* |
| 2400 | * The following are the routines and data structures referred |
| 2401 | * to by the arguments to the "toggle" command. |
| 2402 | */ |
| 2403 | |
| 2404 | static |
| 2405 | lclchars() |
| 2406 | { |
| 2407 | donelclchars = 1; |
| 2408 | return 1; |
| 2409 | } |
| 2410 | |
| 2411 | static |
| 2412 | togdebug() |
| 2413 | { |
| 2414 | #ifndef NOT43 |
| 2415 | if (net > 0 && |
| 2416 | setsockopt(net, SOL_SOCKET, SO_DEBUG, (char *)&debug, sizeof(debug)) |
| 2417 | < 0) { |
| 2418 | perror("setsockopt (SO_DEBUG)"); |
| 2419 | } |
| 2420 | #else /* NOT43 */ |
| 2421 | if (debug) { |
| 2422 | if (net > 0 && setsockopt(net, SOL_SOCKET, SO_DEBUG, 0, 0) < 0) |
| 2423 | perror("setsockopt (SO_DEBUG)"); |
| 2424 | } else |
| 2425 | printf("Cannot turn off socket debugging\n"); |
| 2426 | #endif /* NOT43 */ |
| 2427 | return 1; |
| 2428 | } |
| 2429 | |
| 2430 | |
| 2431 | |
| 2432 | extern int togglehelp(); |
| 2433 | |
| 2434 | struct togglelist { |
| 2435 | char *name; /* name of toggle */ |
| 2436 | char *help; /* help message */ |
| 2437 | int (*handler)(); /* routine to do actual setting */ |
| 2438 | int dohelp; /* should we display help information */ |
| 2439 | int *variable; |
| 2440 | char *actionexplanation; |
| 2441 | }; |
| 2442 | |
| 2443 | static struct togglelist Togglelist[] = { |
| 2444 | { "autoflush", |
| 2445 | "toggle flushing of output when sending interrupt characters", |
| 2446 | 0, |
| 2447 | 1, |
| 2448 | &autoflush, |
| 2449 | "flush output when sending interrupt characters" }, |
| 2450 | { "autosynch", |
| 2451 | "toggle automatic sending of interrupt characters in urgent mode", |
| 2452 | 0, |
| 2453 | 1, |
| 2454 | &autosynch, |
| 2455 | "send interrupt characters in urgent mode" }, |
| 2456 | { "crmod", |
| 2457 | "toggle mapping of received carriage returns", |
| 2458 | 0, |
| 2459 | 1, |
| 2460 | &crmod, |
| 2461 | "map carriage return on output" }, |
| 2462 | { "localchars", |
| 2463 | "toggle local recognition of certain control characters", |
| 2464 | lclchars, |
| 2465 | 1, |
| 2466 | &localchars, |
| 2467 | "recognize certain control characters" }, |
| 2468 | { " ", "", 0, 1 }, /* empty line */ |
| 2469 | { "debug", |
| 2470 | "(debugging) toggle debugging", |
| 2471 | togdebug, |
| 2472 | 1, |
| 2473 | &debug, |
| 2474 | "turn on socket level debugging" }, |
| 2475 | { "netdata", |
| 2476 | "(debugging) toggle printing of hexadecimal network data", |
| 2477 | 0, |
| 2478 | 1, |
| 2479 | &netdata, |
| 2480 | "print hexadecimal representation of network traffic" }, |
| 2481 | { "options", |
| 2482 | "(debugging) toggle viewing of options processing", |
| 2483 | 0, |
| 2484 | 1, |
| 2485 | &showoptions, |
| 2486 | "show option processing" }, |
| 2487 | { " ", "", 0, 1 }, /* empty line */ |
| 2488 | { "?", |
| 2489 | "display help information", |
| 2490 | togglehelp, |
| 2491 | 1 }, |
| 2492 | { "help", |
| 2493 | "display help information", |
| 2494 | togglehelp, |
| 2495 | 0 }, |
| 2496 | { 0 } |
| 2497 | }; |
| 2498 | |
| 2499 | static |
| 2500 | togglehelp() |
| 2501 | { |
| 2502 | struct togglelist *c; |
| 2503 | |
| 2504 | for (c = Togglelist; c->name; c++) { |
| 2505 | if (c->dohelp) { |
| 2506 | printf("%s\t%s\n", c->name, c->help); |
| 2507 | } |
| 2508 | } |
| 2509 | return 0; |
| 2510 | } |
| 2511 | |
| 2512 | static char ** |
| 2513 | getnexttoggle(name) |
| 2514 | char *name; |
| 2515 | { |
| 2516 | struct togglelist *c = (struct togglelist *) name; |
| 2517 | |
| 2518 | return (char **) (c+1); |
| 2519 | } |
| 2520 | |
| 2521 | static struct togglelist * |
| 2522 | gettoggle(name) |
| 2523 | char *name; |
| 2524 | { |
| 2525 | return (struct togglelist *) |
| 2526 | genget(name, (char **) Togglelist, getnexttoggle); |
| 2527 | } |
| 2528 | |
| 2529 | static |
| 2530 | toggle(argc, argv) |
| 2531 | int argc; |
| 2532 | char *argv[]; |
| 2533 | { |
| 2534 | int retval = 1; |
| 2535 | char *name; |
| 2536 | struct togglelist *c; |
| 2537 | |
| 2538 | if (argc < 2) { |
| 2539 | fprintf(stderr, |
| 2540 | "Need an argument to 'toggle' command. 'toggle ?' for help.\n"); |
| 2541 | return 0; |
| 2542 | } |
| 2543 | argc--; |
| 2544 | argv++; |
| 2545 | while (argc--) { |
| 2546 | name = *argv++; |
| 2547 | c = gettoggle(name); |
| 2548 | if (c == Ambiguous(struct togglelist *)) { |
| 2549 | fprintf(stderr, "'%s': ambiguous argument ('toggle ?' for help).\n", |
| 2550 | name); |
| 2551 | return 0; |
| 2552 | } else if (c == 0) { |
| 2553 | fprintf(stderr, "'%s': unknown argument ('toggle ?' for help).\n", |
| 2554 | name); |
| 2555 | return 0; |
| 2556 | } else { |
| 2557 | if (c->variable) { |
| 2558 | *c->variable = !*c->variable; /* invert it */ |
| 2559 | printf("%s %s.\n", *c->variable? "Will" : "Won't", |
| 2560 | c->actionexplanation); |
| 2561 | } |
| 2562 | if (c->handler) { |
| 2563 | retval &= (*c->handler)(c); |
| 2564 | } |
| 2565 | } |
| 2566 | } |
| 2567 | return retval; |
| 2568 | } |
| 2569 | \f |
| 2570 | /* |
| 2571 | * The following perform the "set" command. |
| 2572 | */ |
| 2573 | |
| 2574 | struct setlist { |
| 2575 | char *name; /* name */ |
| 2576 | char *help; /* help information */ |
| 2577 | char *charp; /* where it is located at */ |
| 2578 | }; |
| 2579 | |
| 2580 | static struct setlist Setlist[] = { |
| 2581 | { "echo", "character to toggle local echoing on/off", &echoc }, |
| 2582 | { "escape", "character to escape back to telnet command mode", &escape }, |
| 2583 | { " ", "" }, |
| 2584 | { " ", "The following need 'localchars' to be toggled true", 0 }, |
| 2585 | { "erase", "character to cause an Erase Character", &nttyb.sg_erase }, |
| 2586 | { "flushoutput", "character to cause an Abort Oubput", &nltc.t_flushc }, |
| 2587 | { "interrupt", "character to cause an Interrupt Process", &ntc.t_intrc }, |
| 2588 | { "kill", "character to cause an Erase Line", &nttyb.sg_kill }, |
| 2589 | { "quit", "character to cause a Break", &ntc.t_quitc }, |
| 2590 | { "eof", "character to cause an EOF ", &ntc.t_eofc }, |
| 2591 | { 0 } |
| 2592 | }; |
| 2593 | |
| 2594 | static char ** |
| 2595 | getnextset(name) |
| 2596 | char *name; |
| 2597 | { |
| 2598 | struct setlist *c = (struct setlist *)name; |
| 2599 | |
| 2600 | return (char **) (c+1); |
| 2601 | } |
| 2602 | |
| 2603 | static struct setlist * |
| 2604 | getset(name) |
| 2605 | char *name; |
| 2606 | { |
| 2607 | return (struct setlist *) genget(name, (char **) Setlist, getnextset); |
| 2608 | } |
| 2609 | |
| 2610 | static |
| 2611 | setcmd(argc, argv) |
| 2612 | int argc; |
| 2613 | char *argv[]; |
| 2614 | { |
| 2615 | int value; |
| 2616 | struct setlist *ct; |
| 2617 | |
| 2618 | /* XXX back we go... sigh */ |
| 2619 | if (argc != 3) { |
| 2620 | if ((argc == 2) && |
| 2621 | ((!strcmp(argv[1], "?")) || (!strcmp(argv[1], "help")))) { |
| 2622 | for (ct = Setlist; ct->name; ct++) { |
| 2623 | printf("%s\t%s\n", ct->name, ct->help); |
| 2624 | } |
| 2625 | printf("?\tdisplay help information\n"); |
| 2626 | } else { |
| 2627 | printf("Format is 'set Name Value'\n'set ?' for help.\n"); |
| 2628 | } |
| 2629 | return 0; |
| 2630 | } |
| 2631 | |
| 2632 | ct = getset(argv[1]); |
| 2633 | if (ct == 0) { |
| 2634 | fprintf(stderr, "'%s': unknown argument ('set ?' for help).\n", |
| 2635 | argv[1]); |
| 2636 | return 0; |
| 2637 | } else if (ct == Ambiguous(struct setlist *)) { |
| 2638 | fprintf(stderr, "'%s': ambiguous argument ('set ?' for help).\n", |
| 2639 | argv[1]); |
| 2640 | return 0; |
| 2641 | } else { |
| 2642 | if (strcmp("off", argv[2])) { |
| 2643 | value = special(argv[2]); |
| 2644 | } else { |
| 2645 | value = -1; |
| 2646 | } |
| 2647 | *(ct->charp) = value; |
| 2648 | printf("%s character is '%s'.\n", ct->name, control(*(ct->charp))); |
| 2649 | } |
| 2650 | return 1; |
| 2651 | } |
| 2652 | \f |
| 2653 | /* |
| 2654 | * The following are the data structures and routines for the |
| 2655 | * 'mode' command. |
| 2656 | */ |
| 2657 | |
| 2658 | static |
| 2659 | dolinemode() |
| 2660 | { |
| 2661 | if (hisopts[TELOPT_SGA]) { |
| 2662 | wontoption(TELOPT_SGA, 0); |
| 2663 | } |
| 2664 | if (hisopts[TELOPT_ECHO]) { |
| 2665 | wontoption(TELOPT_ECHO, 0); |
| 2666 | } |
| 2667 | return 1; |
| 2668 | } |
| 2669 | |
| 2670 | static |
| 2671 | docharmode() |
| 2672 | { |
| 2673 | if (!hisopts[TELOPT_SGA]) { |
| 2674 | willoption(TELOPT_SGA, 0); |
| 2675 | } |
| 2676 | if (!hisopts[TELOPT_ECHO]) { |
| 2677 | willoption(TELOPT_ECHO, 0); |
| 2678 | } |
| 2679 | return 1; |
| 2680 | } |
| 2681 | |
| 2682 | static struct cmd Modelist[] = { |
| 2683 | { "character", "character-at-a-time mode", docharmode, 1, 1 }, |
| 2684 | { "line", "line-by-line mode", dolinemode, 1, 1 }, |
| 2685 | { 0 }, |
| 2686 | }; |
| 2687 | |
| 2688 | static char ** |
| 2689 | getnextmode(name) |
| 2690 | char *name; |
| 2691 | { |
| 2692 | struct cmd *c = (struct cmd *) name; |
| 2693 | |
| 2694 | return (char **) (c+1); |
| 2695 | } |
| 2696 | |
| 2697 | static struct cmd * |
| 2698 | getmodecmd(name) |
| 2699 | char *name; |
| 2700 | { |
| 2701 | return (struct cmd *) genget(name, (char **) Modelist, getnextmode); |
| 2702 | } |
| 2703 | |
| 2704 | static |
| 2705 | modecmd(argc, argv) |
| 2706 | int argc; |
| 2707 | char *argv[]; |
| 2708 | { |
| 2709 | struct cmd *mt; |
| 2710 | |
| 2711 | if ((argc != 2) || !strcmp(argv[1], "?") || !strcmp(argv[1], "help")) { |
| 2712 | printf("format is: 'mode Mode', where 'Mode' is one of:\n\n"); |
| 2713 | for (mt = Modelist; mt->name; mt++) { |
| 2714 | printf("%s\t%s\n", mt->name, mt->help); |
| 2715 | } |
| 2716 | return 0; |
| 2717 | } |
| 2718 | mt = getmodecmd(argv[1]); |
| 2719 | if (mt == 0) { |
| 2720 | fprintf(stderr, "Unknown mode '%s' ('mode ?' for help).\n", argv[1]); |
| 2721 | return 0; |
| 2722 | } else if (mt == Ambiguous(struct cmd *)) { |
| 2723 | fprintf(stderr, "Ambiguous mode '%s' ('mode ?' for help).\n", argv[1]); |
| 2724 | return 0; |
| 2725 | } else { |
| 2726 | (*mt->handler)(); |
| 2727 | } |
| 2728 | return 1; |
| 2729 | } |
| 2730 | \f |
| 2731 | /* |
| 2732 | * The following data structures and routines implement the |
| 2733 | * "display" command. |
| 2734 | */ |
| 2735 | |
| 2736 | static |
| 2737 | display(argc, argv) |
| 2738 | int argc; |
| 2739 | char *argv[]; |
| 2740 | { |
| 2741 | #define dotog(tl) if (tl->variable && tl->actionexplanation) { \ |
| 2742 | if (*tl->variable) { \ |
| 2743 | printf("will"); \ |
| 2744 | } else { \ |
| 2745 | printf("won't"); \ |
| 2746 | } \ |
| 2747 | printf(" %s.\n", tl->actionexplanation); \ |
| 2748 | } |
| 2749 | |
| 2750 | #define doset(sl) if (sl->name && *sl->name != ' ') { \ |
| 2751 | printf("[%s]\t%s.\n", control(*sl->charp), sl->name); \ |
| 2752 | } |
| 2753 | |
| 2754 | struct togglelist *tl; |
| 2755 | struct setlist *sl; |
| 2756 | |
| 2757 | if (argc == 1) { |
| 2758 | for (tl = Togglelist; tl->name; tl++) { |
| 2759 | dotog(tl); |
| 2760 | } |
| 2761 | printf("\n"); |
| 2762 | for (sl = Setlist; sl->name; sl++) { |
| 2763 | doset(sl); |
| 2764 | } |
| 2765 | } else { |
| 2766 | int i; |
| 2767 | |
| 2768 | for (i = 1; i < argc; i++) { |
| 2769 | sl = getset(argv[i]); |
| 2770 | tl = gettoggle(argv[i]); |
| 2771 | if ((sl == Ambiguous(struct setlist *)) || |
| 2772 | (tl == Ambiguous(struct togglelist *))) { |
| 2773 | printf("?Ambiguous argument '%s'.\n", argv[i]); |
| 2774 | return 0; |
| 2775 | } else if (!sl && !tl) { |
| 2776 | printf("?Unknown argument '%s'.\n", argv[i]); |
| 2777 | return 0; |
| 2778 | } else { |
| 2779 | if (tl) { |
| 2780 | dotog(tl); |
| 2781 | } |
| 2782 | if (sl) { |
| 2783 | doset(sl); |
| 2784 | } |
| 2785 | } |
| 2786 | } |
| 2787 | } |
| 2788 | return 1; |
| 2789 | #undef doset |
| 2790 | #undef dotog |
| 2791 | } |
| 2792 | \f |
| 2793 | /* |
| 2794 | * The following are the data structures, and many of the routines, |
| 2795 | * relating to command processing. |
| 2796 | */ |
| 2797 | |
| 2798 | /* |
| 2799 | * Set the escape character. |
| 2800 | */ |
| 2801 | static |
| 2802 | setescape(argc, argv) |
| 2803 | int argc; |
| 2804 | char *argv[]; |
| 2805 | { |
| 2806 | register char *arg; |
| 2807 | char buf[50]; |
| 2808 | |
| 2809 | printf( |
| 2810 | "Deprecated usage - please use 'set escape%s%s' in the future.\n", |
| 2811 | (argc > 2)? " ":"", (argc > 2)? argv[1]: ""); |
| 2812 | if (argc > 2) |
| 2813 | arg = argv[1]; |
| 2814 | else { |
| 2815 | printf("new escape character: "); |
| 2816 | gets(buf); |
| 2817 | arg = buf; |
| 2818 | } |
| 2819 | if (arg[0] != '\0') |
| 2820 | escape = arg[0]; |
| 2821 | if (!In3270) { |
| 2822 | printf("Escape character is '%s'.\n", control(escape)); |
| 2823 | } |
| 2824 | fflush(stdout); |
| 2825 | return 1; |
| 2826 | } |
| 2827 | |
| 2828 | /*VARARGS*/ |
| 2829 | static |
| 2830 | togcrmod() |
| 2831 | { |
| 2832 | crmod = !crmod; |
| 2833 | printf("Deprecated usage - please use 'toggle crmod' in the future.\n"); |
| 2834 | printf("%s map carriage return on output.\n", crmod ? "Will" : "Won't"); |
| 2835 | fflush(stdout); |
| 2836 | return 1; |
| 2837 | } |
| 2838 | |
| 2839 | /*VARARGS*/ |
| 2840 | suspend() |
| 2841 | { |
| 2842 | setcommandmode(); |
| 2843 | #if defined(unix) |
| 2844 | kill(0, SIGTSTP); |
| 2845 | #endif /* defined(unix) */ |
| 2846 | /* reget parameters in case they were changed */ |
| 2847 | ioctl(0, TIOCGETP, (char *)&ottyb); |
| 2848 | ioctl(0, TIOCGETC, (char *)&otc); |
| 2849 | ioctl(0, TIOCGLTC, (char *)&oltc); |
| 2850 | return 1; |
| 2851 | } |
| 2852 | |
| 2853 | /*VARARGS*/ |
| 2854 | static |
| 2855 | bye(argc, argv) |
| 2856 | int argc; /* Number of arguments */ |
| 2857 | char *argv[]; /* arguments */ |
| 2858 | { |
| 2859 | if (connected) { |
| 2860 | shutdown(net, 2); |
| 2861 | printf("Connection closed.\n"); |
| 2862 | close(net); |
| 2863 | connected = 0; |
| 2864 | /* reset options */ |
| 2865 | tninit(); |
| 2866 | #if defined(TN3270) |
| 2867 | SetIn3270(); /* Get out of 3270 mode */ |
| 2868 | #endif /* defined(TN3270) */ |
| 2869 | } |
| 2870 | if ((argc != 2) || (strcmp(argv[1], "fromquit") != 0)) { |
| 2871 | longjmp(toplevel, 1); |
| 2872 | /* NOTREACHED */ |
| 2873 | } |
| 2874 | return 1; /* Keep lint, etc., happy */ |
| 2875 | } |
| 2876 | |
| 2877 | /*VARARGS*/ |
| 2878 | quit() |
| 2879 | { |
| 2880 | (void) call(bye, "bye", "fromquit", 0); |
| 2881 | Exit(0); |
| 2882 | /*NOTREACHED*/ |
| 2883 | return 1; /* just to keep lint happy */ |
| 2884 | } |
| 2885 | |
| 2886 | /* |
| 2887 | * Print status about the connection. |
| 2888 | */ |
| 2889 | static |
| 2890 | status(argc, argv) |
| 2891 | int argc; |
| 2892 | char *argv[]; |
| 2893 | { |
| 2894 | if (connected) { |
| 2895 | printf("Connected to %s.\n", hostname); |
| 2896 | if (argc < 2) { |
| 2897 | printf("Operating in %s.\n", |
| 2898 | modelist[getconnmode()].modedescriptions); |
| 2899 | if (localchars) { |
| 2900 | printf("Catching signals locally.\n"); |
| 2901 | } |
| 2902 | } |
| 2903 | } else { |
| 2904 | printf("No connection.\n"); |
| 2905 | } |
| 2906 | # if !defined(TN3270) |
| 2907 | printf("Escape character is '%s'.\n", control(escape)); |
| 2908 | fflush(stdout); |
| 2909 | # else /* !defined(TN3270) */ |
| 2910 | if ((!In3270) && ((argc < 2) || strcmp(argv[1], "notmuch"))) { |
| 2911 | printf("Escape character is '%s'.\n", control(escape)); |
| 2912 | } |
| 2913 | # if defined(unix) |
| 2914 | if (In3270 && transcom) { |
| 2915 | printf("Transparent mode command is '%s'.\n", transcom); |
| 2916 | } |
| 2917 | # endif /* defined(unix) */ |
| 2918 | fflush(stdout); |
| 2919 | if (In3270) { |
| 2920 | return 0; |
| 2921 | } |
| 2922 | # endif /* defined(TN3270) */ |
| 2923 | return 1; |
| 2924 | } |
| 2925 | |
| 2926 | #if defined(TN3270) && defined(unix) |
| 2927 | static |
| 2928 | settranscom(argc, argv) |
| 2929 | int argc; |
| 2930 | char *argv[]; |
| 2931 | { |
| 2932 | int i, len = 0; |
| 2933 | char *strcpy(), *strcat(); |
| 2934 | |
| 2935 | if (argc == 1 && transcom) { |
| 2936 | transcom = 0; |
| 2937 | } |
| 2938 | if (argc == 1) { |
| 2939 | return; |
| 2940 | } |
| 2941 | for (i = 1; i < argc; ++i) { |
| 2942 | len += 1 + strlen(argv[1]); |
| 2943 | } |
| 2944 | transcom = tline; |
| 2945 | (void) strcpy(transcom, argv[1]); |
| 2946 | for (i = 2; i < argc; ++i) { |
| 2947 | (void) strcat(transcom, " "); |
| 2948 | (void) strcat(transcom, argv[i]); |
| 2949 | } |
| 2950 | } |
| 2951 | #endif /* defined(TN3270) && defined(unix) */ |
| 2952 | |
| 2953 | |
| 2954 | static |
| 2955 | tn(argc, argv) |
| 2956 | int argc; |
| 2957 | char *argv[]; |
| 2958 | { |
| 2959 | register struct hostent *host = 0; |
| 2960 | #if defined(msdos) |
| 2961 | char *cp; |
| 2962 | #endif /* defined(msdos) */ |
| 2963 | |
| 2964 | if (connected) { |
| 2965 | printf("?Already connected to %s\n", hostname); |
| 2966 | return 0; |
| 2967 | } |
| 2968 | if (argc < 2) { |
| 2969 | (void) strcpy(line, "Connect "); |
| 2970 | printf("(to) "); |
| 2971 | gets(&line[strlen(line)]); |
| 2972 | makeargv(); |
| 2973 | argc = margc; |
| 2974 | argv = margv; |
| 2975 | } |
| 2976 | if (argc > 3) { |
| 2977 | printf("usage: %s host-name [port]\n", argv[0]); |
| 2978 | return 0; |
| 2979 | } |
| 2980 | #if defined(msdos) |
| 2981 | for (cp = argv[1]; *cp; cp++) { |
| 2982 | if (isupper(*cp)) { |
| 2983 | *cp = tolower(*cp); |
| 2984 | } |
| 2985 | } |
| 2986 | #endif /* defined(msdos) */ |
| 2987 | sin.sin_addr.s_addr = inet_addr(argv[1]); |
| 2988 | if (sin.sin_addr.s_addr != -1) { |
| 2989 | sin.sin_family = AF_INET; |
| 2990 | (void) strcpy(hnamebuf, argv[1]); |
| 2991 | hostname = hnamebuf; |
| 2992 | } else { |
| 2993 | host = gethostbyname(argv[1]); |
| 2994 | if (host) { |
| 2995 | sin.sin_family = host->h_addrtype; |
| 2996 | #if defined(h_addr) /* In 4.3, this is a #define */ |
| 2997 | bcopy(host->h_addr_list[0], (caddr_t)&sin.sin_addr, host->h_length); |
| 2998 | #else /* defined(h_addr) */ |
| 2999 | bcopy(host->h_addr, (caddr_t)&sin.sin_addr, host->h_length); |
| 3000 | #endif /* defined(h_addr) */ |
| 3001 | hostname = host->h_name; |
| 3002 | } else { |
| 3003 | printf("%s: unknown host\n", argv[1]); |
| 3004 | return 0; |
| 3005 | } |
| 3006 | } |
| 3007 | sin.sin_port = sp->s_port; |
| 3008 | if (argc == 3) { |
| 3009 | sin.sin_port = atoi(argv[2]); |
| 3010 | if (sin.sin_port == 0) { |
| 3011 | sp = getservbyname(argv[2], "tcp"); |
| 3012 | if (sp) |
| 3013 | sin.sin_port = sp->s_port; |
| 3014 | else { |
| 3015 | printf("%s: bad port number\n", argv[2]); |
| 3016 | return 0; |
| 3017 | } |
| 3018 | } else { |
| 3019 | sin.sin_port = atoi(argv[2]); |
| 3020 | sin.sin_port = htons(sin.sin_port); |
| 3021 | } |
| 3022 | telnetport = 0; |
| 3023 | } else { |
| 3024 | telnetport = 1; |
| 3025 | } |
| 3026 | #if defined(unix) |
| 3027 | signal(SIGINT, intr); |
| 3028 | signal(SIGQUIT, intr2); |
| 3029 | signal(SIGPIPE, deadpeer); |
| 3030 | #endif /* defined(unix) */ |
| 3031 | printf("Trying...\n"); |
| 3032 | do { |
| 3033 | net = socket(AF_INET, SOCK_STREAM, 0); |
| 3034 | if (net < 0) { |
| 3035 | perror("telnet: socket"); |
| 3036 | return 0; |
| 3037 | } |
| 3038 | #ifndef NOT43 |
| 3039 | if (debug && setsockopt(net, SOL_SOCKET, SO_DEBUG, |
| 3040 | (char *)&debug, sizeof(debug)) < 0) |
| 3041 | #else /* NOT43 */ |
| 3042 | if (debug && setsockopt(net, SOL_SOCKET, SO_DEBUG, 0, 0) < 0) |
| 3043 | #endif /* NOT43 */ |
| 3044 | perror("setsockopt (SO_DEBUG)"); |
| 3045 | |
| 3046 | if (connect(net, (struct sockaddr *)&sin, sizeof (sin)) < 0) { |
| 3047 | #if defined(h_addr) /* In 4.3, this is a #define */ |
| 3048 | if (host && host->h_addr_list[1]) { |
| 3049 | int oerrno = errno; |
| 3050 | |
| 3051 | fprintf(stderr, "telnet: connect to address %s: ", |
| 3052 | inet_ntoa(sin.sin_addr)); |
| 3053 | errno = oerrno; |
| 3054 | perror((char *)0); |
| 3055 | host->h_addr_list++; |
| 3056 | bcopy(host->h_addr_list[0], |
| 3057 | (caddr_t)&sin.sin_addr, host->h_length); |
| 3058 | fprintf(stderr, "Trying %s...\n", |
| 3059 | inet_ntoa(sin.sin_addr)); |
| 3060 | (void) close(net); |
| 3061 | continue; |
| 3062 | } |
| 3063 | #endif /* defined(h_addr) */ |
| 3064 | perror("telnet: Unable to connect to remote host"); |
| 3065 | #if defined(unix) |
| 3066 | signal(SIGINT, SIG_DFL); |
| 3067 | signal(SIGQUIT, SIG_DFL); |
| 3068 | #endif /* defined(unix) */ |
| 3069 | return 0; |
| 3070 | } |
| 3071 | connected++; |
| 3072 | } while (connected == 0); |
| 3073 | call(status, "status", "notmuch", 0); |
| 3074 | if (setjmp(peerdied) == 0) |
| 3075 | telnet(); |
| 3076 | ExitString(stderr, "Connection closed by foreign host.\n",1); |
| 3077 | /*NOTREACHED*/ |
| 3078 | } |
| 3079 | |
| 3080 | |
| 3081 | #define HELPINDENT (sizeof ("connect")) |
| 3082 | |
| 3083 | static char |
| 3084 | openhelp[] = "connect to a site", |
| 3085 | closehelp[] = "close current connection", |
| 3086 | quithelp[] = "exit telnet", |
| 3087 | zhelp[] = "suspend telnet", |
| 3088 | statushelp[] = "print status information", |
| 3089 | helphelp[] = "print help information", |
| 3090 | sendhelp[] = "transmit special characters ('send ?' for more)", |
| 3091 | sethelp[] = "set operating parameters ('set ?' for more)", |
| 3092 | togglestring[] ="toggle operating parameters ('toggle ?' for more)", |
| 3093 | displayhelp[] = "display operating parameters", |
| 3094 | #if defined(TN3270) && defined(unix) |
| 3095 | transcomhelp[] = "specify Unix command for transparent mode pipe", |
| 3096 | #endif /* defined(TN3270) && defined(unix) */ |
| 3097 | modehelp[] = "try to enter line-by-line or character-at-a-time mode"; |
| 3098 | |
| 3099 | extern int help(); |
| 3100 | |
| 3101 | static struct cmd cmdtab[] = { |
| 3102 | { "close", closehelp, bye, 1, 1 }, |
| 3103 | { "display", displayhelp, display, 1, 0 }, |
| 3104 | { "mode", modehelp, modecmd, 1, 1 }, |
| 3105 | { "open", openhelp, tn, 1, 0 }, |
| 3106 | { "quit", quithelp, quit, 1, 0 }, |
| 3107 | { "send", sendhelp, sendcmd, 1, 1 }, |
| 3108 | { "set", sethelp, setcmd, 1, 0 }, |
| 3109 | { "status", statushelp, status, 1, 0 }, |
| 3110 | { "toggle", togglestring, toggle, 1, 0 }, |
| 3111 | #if defined(TN3270) && defined(unix) |
| 3112 | { "transcom", transcomhelp, settranscom, 1, 0 }, |
| 3113 | #endif /* defined(TN3270) && defined(unix) */ |
| 3114 | { "z", zhelp, suspend, 1, 0 }, |
| 3115 | { "?", helphelp, help, 1, 0 }, |
| 3116 | 0 |
| 3117 | }; |
| 3118 | |
| 3119 | static char crmodhelp[] = "deprecated command -- use 'toggle crmod' instead"; |
| 3120 | static char escapehelp[] = "deprecated command -- use 'set escape' instead"; |
| 3121 | |
| 3122 | static struct cmd cmdtab2[] = { |
| 3123 | { "help", helphelp, help, 0, 0 }, |
| 3124 | { "escape", escapehelp, setescape, 1, 0 }, |
| 3125 | { "crmod", crmodhelp, togcrmod, 1, 0 }, |
| 3126 | 0 |
| 3127 | }; |
| 3128 | |
| 3129 | /* |
| 3130 | * Call routine with argc, argv set from args (terminated by 0). |
| 3131 | * VARARGS2 |
| 3132 | */ |
| 3133 | static |
| 3134 | call(routine, args) |
| 3135 | int (*routine)(); |
| 3136 | char *args; |
| 3137 | { |
| 3138 | register char **argp; |
| 3139 | register int argc; |
| 3140 | |
| 3141 | for (argc = 0, argp = &args; *argp++ != 0; argc++) |
| 3142 | ; |
| 3143 | return (*routine)(argc, &args); |
| 3144 | } |
| 3145 | |
| 3146 | static char ** |
| 3147 | getnextcmd(name) |
| 3148 | char *name; |
| 3149 | { |
| 3150 | struct cmd *c = (struct cmd *) name; |
| 3151 | |
| 3152 | return (char **) (c+1); |
| 3153 | } |
| 3154 | |
| 3155 | static struct cmd * |
| 3156 | getcmd(name) |
| 3157 | char *name; |
| 3158 | { |
| 3159 | struct cmd *cm; |
| 3160 | |
| 3161 | if ((cm = (struct cmd *) genget(name, (char **) cmdtab, getnextcmd)) != 0) { |
| 3162 | return cm; |
| 3163 | } else { |
| 3164 | return (struct cmd *) genget(name, (char **) cmdtab2, getnextcmd); |
| 3165 | } |
| 3166 | } |
| 3167 | |
| 3168 | void |
| 3169 | command(top) |
| 3170 | int top; |
| 3171 | { |
| 3172 | register struct cmd *c; |
| 3173 | |
| 3174 | setcommandmode(); |
| 3175 | if (!top) { |
| 3176 | putchar('\n'); |
| 3177 | } else { |
| 3178 | #if defined(unix) |
| 3179 | signal(SIGINT, SIG_DFL); |
| 3180 | signal(SIGQUIT, SIG_DFL); |
| 3181 | #endif /* defined(unix) */ |
| 3182 | } |
| 3183 | for (;;) { |
| 3184 | printf("%s> ", prompt); |
| 3185 | if (gets(line) == NULL) { |
| 3186 | if (feof(stdin) || ferror(stdin)) |
| 3187 | quit(); |
| 3188 | break; |
| 3189 | } |
| 3190 | if (line[0] == 0) |
| 3191 | break; |
| 3192 | makeargv(); |
| 3193 | c = getcmd(margv[0]); |
| 3194 | if (c == Ambiguous(struct cmd *)) { |
| 3195 | printf("?Ambiguous command\n"); |
| 3196 | continue; |
| 3197 | } |
| 3198 | if (c == 0) { |
| 3199 | printf("?Invalid command\n"); |
| 3200 | continue; |
| 3201 | } |
| 3202 | if (c->needconnect && !connected) { |
| 3203 | printf("?Need to be connected first.\n"); |
| 3204 | continue; |
| 3205 | } |
| 3206 | if ((*c->handler)(margc, margv)) { |
| 3207 | break; |
| 3208 | } |
| 3209 | } |
| 3210 | if (!top) { |
| 3211 | if (!connected) { |
| 3212 | longjmp(toplevel, 1); |
| 3213 | /*NOTREACHED*/ |
| 3214 | } |
| 3215 | setconnmode(); |
| 3216 | } |
| 3217 | } |
| 3218 | \f |
| 3219 | /* |
| 3220 | * Help command. |
| 3221 | */ |
| 3222 | static |
| 3223 | help(argc, argv) |
| 3224 | int argc; |
| 3225 | char *argv[]; |
| 3226 | { |
| 3227 | register struct cmd *c; |
| 3228 | |
| 3229 | if (argc == 1) { |
| 3230 | printf("Commands may be abbreviated. Commands are:\n\n"); |
| 3231 | for (c = cmdtab; c->name; c++) |
| 3232 | if (c->dohelp) { |
| 3233 | printf("%-*s\t%s\n", HELPINDENT, c->name, |
| 3234 | c->help); |
| 3235 | } |
| 3236 | return 0; |
| 3237 | } |
| 3238 | while (--argc > 0) { |
| 3239 | register char *arg; |
| 3240 | arg = *++argv; |
| 3241 | c = getcmd(arg); |
| 3242 | if (c == Ambiguous(struct cmd *)) |
| 3243 | printf("?Ambiguous help command %s\n", arg); |
| 3244 | else if (c == (struct cmd *)0) |
| 3245 | printf("?Invalid help command %s\n", arg); |
| 3246 | else |
| 3247 | printf("%s\n", c->help); |
| 3248 | } |
| 3249 | return 0; |
| 3250 | } |
| 3251 | \f |
| 3252 | /* |
| 3253 | * main. Parse arguments, invoke the protocol or command parser. |
| 3254 | */ |
| 3255 | |
| 3256 | |
| 3257 | void |
| 3258 | main(argc, argv) |
| 3259 | int argc; |
| 3260 | char *argv[]; |
| 3261 | { |
| 3262 | tninit(); /* Clear out things */ |
| 3263 | |
| 3264 | NetTrace = stdout; |
| 3265 | ioctl(0, TIOCGETP, (char *)&ottyb); |
| 3266 | ioctl(0, TIOCGETC, (char *)&otc); |
| 3267 | ioctl(0, TIOCGLTC, (char *)&oltc); |
| 3268 | #if defined(LNOFLSH) |
| 3269 | ioctl(0, TIOCLGET, (char *)&autoflush); |
| 3270 | autoflush = !(autoflush&LNOFLSH); /* if LNOFLSH, no autoflush */ |
| 3271 | #else /* LNOFLSH */ |
| 3272 | autoflush = 1; |
| 3273 | #endif /* LNOFLSH */ |
| 3274 | ntc = otc; |
| 3275 | nltc = oltc; |
| 3276 | nttyb = ottyb; |
| 3277 | setbuf(stdin, (char *)0); |
| 3278 | setbuf(stdout, (char *)0); |
| 3279 | prompt = argv[0]; |
| 3280 | if (argc > 1 && !strcmp(argv[1], "-d")) { |
| 3281 | debug = 1; |
| 3282 | argv++; |
| 3283 | argc--; |
| 3284 | } |
| 3285 | if (argc > 1 && !strcmp(argv[1], "-n")) { |
| 3286 | argv++; |
| 3287 | argc--; |
| 3288 | if (argc > 1) { /* get file name */ |
| 3289 | NetTrace = fopen(argv[1], "w"); |
| 3290 | argv++; |
| 3291 | argc--; |
| 3292 | if (NetTrace == NULL) { |
| 3293 | NetTrace = stdout; |
| 3294 | } |
| 3295 | } |
| 3296 | } |
| 3297 | #if defined(TN3270) && defined(unix) |
| 3298 | if (argc > 1 && !strcmp(argv[1], "-t")) { |
| 3299 | argv++; |
| 3300 | argc--; |
| 3301 | if (argc > 1) { /* get command name */ |
| 3302 | transcom = tline; |
| 3303 | (void) strcpy(transcom, argv[1]); |
| 3304 | argv++; |
| 3305 | argc--; |
| 3306 | } |
| 3307 | } |
| 3308 | #endif /* defined(TN3270) && defined(unix) */ |
| 3309 | if (argc != 1) { |
| 3310 | if (setjmp(toplevel) != 0) |
| 3311 | Exit(0); |
| 3312 | tn(argc, argv); |
| 3313 | } |
| 3314 | setjmp(toplevel); |
| 3315 | for (;;) |
| 3316 | command(1); |
| 3317 | } |