| 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 | #endif /* defined(TN3270) */ |
| 118 | |
| 119 | |
| 120 | |
| 121 | #ifndef FD_SETSIZE |
| 122 | /* |
| 123 | * The following is defined just in case someone should want to run |
| 124 | * this telnet on a 4.2 system. |
| 125 | * |
| 126 | */ |
| 127 | |
| 128 | #define FD_SET(n, p) ((p)->fds_bits[0] |= (1<<(n))) |
| 129 | #define FD_CLR(n, p) ((p)->fds_bits[0] &= ~(1<<(n))) |
| 130 | #define FD_ISSET(n, p) ((p)->fds_bits[0] & (1<<(n))) |
| 131 | #define FD_ZERO(p) ((p)->fds_bits[0] = 0) |
| 132 | |
| 133 | #endif |
| 134 | \f |
| 135 | #define strip(x) ((x)&0x7f) |
| 136 | #define min(x,y) ((x<y)? x:y) |
| 137 | |
| 138 | #if defined(TN3270) |
| 139 | static char Ibuf[8*BUFSIZ], *Ifrontp = Ibuf, *Ibackp = Ibuf; |
| 140 | #endif /* defined(TN3270) */ |
| 141 | |
| 142 | static char ttyobuf[2*BUFSIZ], *tfrontp = ttyobuf, *tbackp = ttyobuf; |
| 143 | #define TTYADD(c) { if (!(SYNCHing||flushout)) { *tfrontp++ = c; } } |
| 144 | #define TTYLOC() (tfrontp) |
| 145 | #define TTYMAX() (ttyobuf+sizeof ttyobuf-1) |
| 146 | #define TTYMIN() (netobuf) |
| 147 | #define TTYBYTES() (tfrontp-tbackp) |
| 148 | #define TTYROOM() (TTYMAX()-TTYLOC()+1) |
| 149 | |
| 150 | static char netobuf[2*BUFSIZ], *nfrontp = netobuf, *nbackp = netobuf; |
| 151 | #define NETADD(c) { *nfrontp++ = c; } |
| 152 | #define NET2ADD(c1,c2) { NETADD(c1); NETADD(c2); } |
| 153 | #define NETLOC() (nfrontp) |
| 154 | #define NETMAX() (netobuf+sizeof netobuf-1) |
| 155 | #define NETBYTES() (nfrontp-nbackp) |
| 156 | #define NETROOM() (NETMAX()-NETLOC()+1) |
| 157 | static char *neturg = 0; /* one past last byte of urgent data */ |
| 158 | |
| 159 | static char subbuffer[100] = { 0 }, |
| 160 | *subpointer, *subend = 0; /* buffer for sub-options */ |
| 161 | #define SB_CLEAR() subpointer = subbuffer; |
| 162 | #define SB_TERM() subend = subpointer; |
| 163 | #define SB_ACCUM(c) if (subpointer < (subbuffer+sizeof subbuffer)) { \ |
| 164 | *subpointer++ = (c); \ |
| 165 | } |
| 166 | |
| 167 | static char sb_terminal[] = { IAC, SB, |
| 168 | TELOPT_TTYPE, TELQUAL_IS, |
| 169 | 'I', 'B', 'M', '-', '3', '2', '7', '8', '-', '2', |
| 170 | IAC, SE }; |
| 171 | #define SBTERMMODEL 13 |
| 172 | |
| 173 | |
| 174 | static char hisopts[256] = { 0 }; |
| 175 | static char myopts[256] = { 0 }; |
| 176 | |
| 177 | static char doopt[] = { IAC, DO, '%', 'c', 0 }; |
| 178 | static char dont[] = { IAC, DONT, '%', 'c', 0 }; |
| 179 | static char will[] = { IAC, WILL, '%', 'c', 0 }; |
| 180 | static char wont[] = { IAC, WONT, '%', 'c', 0 }; |
| 181 | |
| 182 | struct cmd { |
| 183 | char *name; /* command name */ |
| 184 | char *help; /* help string */ |
| 185 | int (*handler)(); /* routine which executes command */ |
| 186 | int dohelp; /* Should we give general help information? */ |
| 187 | int needconnect; /* Do we need to be connected to execute? */ |
| 188 | }; |
| 189 | |
| 190 | static char sibuf[BUFSIZ], *sbp = 0; |
| 191 | static char tibuf[BUFSIZ], *tbp; |
| 192 | static fd_set ibits, obits, xbits; |
| 193 | |
| 194 | |
| 195 | static int |
| 196 | connected = 0, |
| 197 | net = 0, |
| 198 | scc = 0, |
| 199 | tcc = 0, |
| 200 | showoptions = 0, |
| 201 | In3270 = 0, /* Are we in 3270 mode? */ |
| 202 | ISend = 0, /* trying to send network data in */ |
| 203 | debug = 0, |
| 204 | crmod = 0, |
| 205 | netdata = 0, |
| 206 | telnetport = 1; |
| 207 | |
| 208 | static FILE *NetTrace = 0; |
| 209 | |
| 210 | #define CONTROL(x) ((x)&0x1f) /* CTRL(x) is not portable */ |
| 211 | |
| 212 | static char |
| 213 | *prompt = 0, |
| 214 | escape = CONTROL(']'), |
| 215 | echoc = CONTROL('E'); |
| 216 | |
| 217 | static int |
| 218 | SYNCHing = 0, /* we are in TELNET SYNCH mode */ |
| 219 | flushout = 0, /* flush output */ |
| 220 | autoflush = 0, /* flush output when interrupting? */ |
| 221 | autosynch = 0, /* send interrupt characters with SYNCH? */ |
| 222 | localchars = 0, /* we recognize interrupt/quit */ |
| 223 | donelclchars = 0, /* the user has set "localchars" */ |
| 224 | dontlecho = 0; /* do we suppress local echoing right now? */ |
| 225 | |
| 226 | /* The following are some tn3270 specific flags */ |
| 227 | #if defined(TN3270) |
| 228 | |
| 229 | static int |
| 230 | Sent3270TerminalType = 0; /* Have we said we are a 3270? */ |
| 231 | |
| 232 | /* Some real, live, globals. */ |
| 233 | int |
| 234 | #if defined(unix) |
| 235 | HaveInput = 0, /* There is input available to scan */ |
| 236 | #endif /* defined(unix) */ |
| 237 | tout = 0, /* Output file descriptor */ |
| 238 | tin = 0; /* Input file descriptor */ |
| 239 | #if defined(unix) |
| 240 | char *transcom = 0; /* transparent mode command (default: none) */ |
| 241 | #endif /* defined(unix) */ |
| 242 | |
| 243 | #else /* defined(TN3270) */ |
| 244 | static int tin = 0, tout = 0; /* file descriptors */ |
| 245 | #endif /* defined(TN3270) */ |
| 246 | |
| 247 | static char line[200]; |
| 248 | #if defined(TN3270) && defined(unix) |
| 249 | static char tline[200]; |
| 250 | #endif /* defined(TN3270) && defined(unix) */ |
| 251 | static int margc = 0; |
| 252 | static char *margv[20]; |
| 253 | |
| 254 | static jmp_buf toplevel; |
| 255 | static jmp_buf peerdied; |
| 256 | |
| 257 | extern int errno; |
| 258 | |
| 259 | |
| 260 | static struct sockaddr_in sin; |
| 261 | |
| 262 | static struct servent *sp = 0; |
| 263 | |
| 264 | static struct tchars otc = { 0 }, ntc = { 0 }; |
| 265 | static struct ltchars oltc = { 0 }, nltc = { 0 }; |
| 266 | static struct sgttyb ottyb = { 0 }, nttyb = { 0 }; |
| 267 | static int flushline = 1; |
| 268 | |
| 269 | static char *hostname = 0; |
| 270 | static char hnamebuf[32]; |
| 271 | |
| 272 | /* |
| 273 | * The following are some clocks used to decide how to interpret |
| 274 | * the relationship between various variables. |
| 275 | */ |
| 276 | |
| 277 | static struct { |
| 278 | int |
| 279 | system, /* what the current time is */ |
| 280 | echotoggle, /* last time user entered echo character */ |
| 281 | modenegotiated, /* last time operating mode negotiated */ |
| 282 | didnetreceive, /* last time we read data from network */ |
| 283 | gotDM; /* when did we last see a data mark */ |
| 284 | } clocks = { 0 }; |
| 285 | |
| 286 | #define settimer(x) clocks.x = clocks.system++ |
| 287 | \f |
| 288 | /* |
| 289 | * Various utility routines. |
| 290 | */ |
| 291 | |
| 292 | static void |
| 293 | makeargv() |
| 294 | { |
| 295 | register char *cp; |
| 296 | register char **argp = margv; |
| 297 | |
| 298 | margc = 0; |
| 299 | for (cp = line; *cp;) { |
| 300 | while (isspace(*cp)) |
| 301 | cp++; |
| 302 | if (*cp == '\0') |
| 303 | break; |
| 304 | *argp++ = cp; |
| 305 | margc += 1; |
| 306 | while (*cp != '\0' && !isspace(*cp)) |
| 307 | cp++; |
| 308 | if (*cp == '\0') |
| 309 | break; |
| 310 | *cp++ = '\0'; |
| 311 | } |
| 312 | *argp++ = 0; |
| 313 | } |
| 314 | |
| 315 | static char *ambiguous; /* special return value */ |
| 316 | #define Ambiguous(t) ((t)&ambiguous) |
| 317 | |
| 318 | |
| 319 | static char ** |
| 320 | genget(name, table, next) |
| 321 | char *name; /* name to match */ |
| 322 | char **table; /* name entry in table */ |
| 323 | char **(*next)(); /* routine to return next entry in table */ |
| 324 | { |
| 325 | register char *p, *q; |
| 326 | register char **c, **found; |
| 327 | register int nmatches, longest; |
| 328 | |
| 329 | longest = 0; |
| 330 | nmatches = 0; |
| 331 | found = 0; |
| 332 | for (c = table; (p = *c) != 0; c = (*next)(c)) { |
| 333 | for (q = name; |
| 334 | (*q == *p) || (isupper(*q) && tolower(*q) == *p); p++, q++) |
| 335 | if (*q == 0) /* exact match? */ |
| 336 | return (c); |
| 337 | if (!*q) { /* the name was a prefix */ |
| 338 | if (q - name > longest) { |
| 339 | longest = q - name; |
| 340 | nmatches = 1; |
| 341 | found = c; |
| 342 | } else if (q - name == longest) |
| 343 | nmatches++; |
| 344 | } |
| 345 | } |
| 346 | if (nmatches > 1) |
| 347 | return Ambiguous(char **); |
| 348 | return (found); |
| 349 | } |
| 350 | |
| 351 | /* |
| 352 | * Make a character string into a number. |
| 353 | * |
| 354 | * Todo: 1. Could take random integers (12, 0x12, 012, 0b1). |
| 355 | */ |
| 356 | |
| 357 | static |
| 358 | special(s) |
| 359 | register char *s; |
| 360 | { |
| 361 | register char c; |
| 362 | char b; |
| 363 | |
| 364 | switch (*s) { |
| 365 | case '^': |
| 366 | b = *++s; |
| 367 | if (b == '?') { |
| 368 | c = b | 0x40; /* DEL */ |
| 369 | } else { |
| 370 | c = b & 0x1f; |
| 371 | } |
| 372 | break; |
| 373 | default: |
| 374 | c = *s; |
| 375 | break; |
| 376 | } |
| 377 | return c; |
| 378 | } |
| 379 | |
| 380 | /* |
| 381 | * Construct a control character sequence |
| 382 | * for a special character. |
| 383 | */ |
| 384 | static char * |
| 385 | control(c) |
| 386 | register int c; |
| 387 | { |
| 388 | static char buf[3]; |
| 389 | |
| 390 | if (c == 0x7f) |
| 391 | return ("^?"); |
| 392 | if (c == '\377') { |
| 393 | return "off"; |
| 394 | } |
| 395 | if (c >= 0x20) { |
| 396 | buf[0] = c; |
| 397 | buf[1] = 0; |
| 398 | } else { |
| 399 | buf[0] = '^'; |
| 400 | buf[1] = '@'+c; |
| 401 | buf[2] = 0; |
| 402 | } |
| 403 | return (buf); |
| 404 | } |
| 405 | |
| 406 | |
| 407 | /* |
| 408 | * upcase() |
| 409 | * |
| 410 | * Upcase (in place) the argument. |
| 411 | */ |
| 412 | |
| 413 | static void |
| 414 | upcase(argument) |
| 415 | register char *argument; |
| 416 | { |
| 417 | register int c; |
| 418 | |
| 419 | while ((c = *argument) != 0) { |
| 420 | if (islower(c)) { |
| 421 | *argument = toupper(c); |
| 422 | } |
| 423 | argument++; |
| 424 | } |
| 425 | } |
| 426 | \f |
| 427 | /* |
| 428 | * The following are routines used to print out debugging information. |
| 429 | */ |
| 430 | |
| 431 | |
| 432 | static void |
| 433 | Dump(direction, buffer, length) |
| 434 | char direction; |
| 435 | char *buffer; |
| 436 | int length; |
| 437 | { |
| 438 | # define BYTES_PER_LINE 32 |
| 439 | # define min(x,y) ((x<y)? x:y) |
| 440 | char *pThis; |
| 441 | int offset; |
| 442 | |
| 443 | offset = 0; |
| 444 | |
| 445 | while (length) { |
| 446 | /* print one line */ |
| 447 | fprintf(NetTrace, "%c 0x%x\t", direction, offset); |
| 448 | pThis = buffer; |
| 449 | buffer = buffer+min(length, BYTES_PER_LINE); |
| 450 | while (pThis < buffer) { |
| 451 | fprintf(NetTrace, "%.2x", (*pThis)&0xff); |
| 452 | pThis++; |
| 453 | } |
| 454 | fprintf(NetTrace, "\n"); |
| 455 | length -= BYTES_PER_LINE; |
| 456 | offset += BYTES_PER_LINE; |
| 457 | if (length < 0) { |
| 458 | return; |
| 459 | } |
| 460 | /* find next unique line */ |
| 461 | } |
| 462 | } |
| 463 | |
| 464 | |
| 465 | /*VARARGS*/ |
| 466 | static void |
| 467 | printoption(direction, fmt, option, what) |
| 468 | char *direction, *fmt; |
| 469 | int option, what; |
| 470 | { |
| 471 | if (!showoptions) |
| 472 | return; |
| 473 | fprintf(NetTrace, "%s ", direction+1); |
| 474 | if (fmt == doopt) |
| 475 | fmt = "do"; |
| 476 | else if (fmt == dont) |
| 477 | fmt = "dont"; |
| 478 | else if (fmt == will) |
| 479 | fmt = "will"; |
| 480 | else if (fmt == wont) |
| 481 | fmt = "wont"; |
| 482 | else |
| 483 | fmt = "???"; |
| 484 | if (option < (sizeof telopts/sizeof telopts[0])) |
| 485 | fprintf(NetTrace, "%s %s", fmt, telopts[option]); |
| 486 | else |
| 487 | fprintf(NetTrace, "%s %d", fmt, option); |
| 488 | if (*direction == '<') { |
| 489 | fprintf(NetTrace, "\r\n"); |
| 490 | return; |
| 491 | } |
| 492 | fprintf(NetTrace, " (%s)\r\n", what ? "reply" : "don't reply"); |
| 493 | } |
| 494 | |
| 495 | static void |
| 496 | printsub(direction, pointer, length) |
| 497 | char *direction, /* "<" or ">" */ |
| 498 | *pointer; /* where suboption data sits */ |
| 499 | int length; /* length of suboption data */ |
| 500 | { |
| 501 | if (showoptions) { |
| 502 | fprintf(NetTrace, "%s suboption ", |
| 503 | (direction[0] == '<')? "Received":"Sent"); |
| 504 | switch (pointer[0]) { |
| 505 | case TELOPT_TTYPE: |
| 506 | fprintf(NetTrace, "Terminal type "); |
| 507 | switch (pointer[1]) { |
| 508 | case TELQUAL_IS: |
| 509 | { |
| 510 | char tmpbuf[sizeof subbuffer]; |
| 511 | int minlen = min(length, sizeof tmpbuf); |
| 512 | |
| 513 | bcopy(pointer+2, tmpbuf, minlen); |
| 514 | tmpbuf[minlen-1] = 0; |
| 515 | fprintf(NetTrace, "is %s.\n", tmpbuf); |
| 516 | } |
| 517 | break; |
| 518 | case TELQUAL_SEND: |
| 519 | fprintf(NetTrace, "- request to send.\n"); |
| 520 | break; |
| 521 | default: |
| 522 | fprintf(NetTrace, |
| 523 | "- unknown qualifier %d (0x%x).\n", pointer[1]); |
| 524 | } |
| 525 | break; |
| 526 | default: |
| 527 | fprintf(NetTrace, "Unknown option %d (0x%x)\n", |
| 528 | pointer[0], pointer[0]); |
| 529 | } |
| 530 | } |
| 531 | } |
| 532 | \f |
| 533 | /* |
| 534 | * Check to see if any out-of-band data exists on a socket (for |
| 535 | * Telnet "synch" processing). |
| 536 | */ |
| 537 | |
| 538 | static int |
| 539 | stilloob(s) |
| 540 | int s; /* socket number */ |
| 541 | { |
| 542 | static struct timeval timeout = { 0 }; |
| 543 | fd_set excepts; |
| 544 | int value; |
| 545 | |
| 546 | do { |
| 547 | FD_ZERO(&excepts); |
| 548 | FD_SET(s, &excepts); |
| 549 | value = select(s+1, (fd_set *)0, (fd_set *)0, &excepts, &timeout); |
| 550 | } while ((value == -1) && (errno == EINTR)); |
| 551 | |
| 552 | if (value < 0) { |
| 553 | perror("select"); |
| 554 | quit(); |
| 555 | } |
| 556 | if (FD_ISSET(s, &excepts)) { |
| 557 | return 1; |
| 558 | } else { |
| 559 | return 0; |
| 560 | } |
| 561 | } |
| 562 | |
| 563 | |
| 564 | /* |
| 565 | * netflush |
| 566 | * Send as much data as possible to the network, |
| 567 | * handling requests for urgent data. |
| 568 | * |
| 569 | * The return value indicates whether we did any |
| 570 | * useful work. |
| 571 | */ |
| 572 | |
| 573 | |
| 574 | int |
| 575 | netflush() |
| 576 | { |
| 577 | int n; |
| 578 | |
| 579 | if ((n = nfrontp - nbackp) > 0) { |
| 580 | if (!neturg) { |
| 581 | n = write(net, nbackp, n); /* normal write */ |
| 582 | } else { |
| 583 | n = neturg - nbackp; |
| 584 | /* |
| 585 | * In 4.2 (and 4.3) systems, there is some question about |
| 586 | * what byte in a sendOOB operation is the "OOB" data. |
| 587 | * To make ourselves compatible, we only send ONE byte |
| 588 | * out of band, the one WE THINK should be OOB (though |
| 589 | * we really have more the TCP philosophy of urgent data |
| 590 | * rather than the Unix philosophy of OOB data). |
| 591 | */ |
| 592 | if (n > 1) { |
| 593 | n = send(net, nbackp, n-1, 0); /* send URGENT all by itself */ |
| 594 | } else { |
| 595 | n = send(net, nbackp, n, MSG_OOB); /* URGENT data */ |
| 596 | } |
| 597 | } |
| 598 | } |
| 599 | if (n < 0) { |
| 600 | if (errno != ENOBUFS && errno != EWOULDBLOCK) { |
| 601 | setcommandmode(); |
| 602 | perror(hostname); |
| 603 | close(net); |
| 604 | neturg = 0; |
| 605 | longjmp(peerdied, -1); |
| 606 | /*NOTREACHED*/ |
| 607 | } |
| 608 | n = 0; |
| 609 | } |
| 610 | if (netdata && n) { |
| 611 | Dump('>', nbackp, n); |
| 612 | } |
| 613 | nbackp += n; |
| 614 | if (nbackp >= neturg) { |
| 615 | neturg = 0; |
| 616 | } |
| 617 | if (nbackp == nfrontp) { |
| 618 | nbackp = nfrontp = netobuf; |
| 619 | } |
| 620 | return n > 0; |
| 621 | } |
| 622 | \f |
| 623 | /* |
| 624 | * nextitem() |
| 625 | * |
| 626 | * Return the address of the next "item" in the TELNET data |
| 627 | * stream. This will be the address of the next character if |
| 628 | * the current address is a user data character, or it will |
| 629 | * be the address of the character following the TELNET command |
| 630 | * if the current address is a TELNET IAC ("I Am a Command") |
| 631 | * character. |
| 632 | */ |
| 633 | |
| 634 | static char * |
| 635 | nextitem(current) |
| 636 | char *current; |
| 637 | { |
| 638 | if ((*current&0xff) != IAC) { |
| 639 | return current+1; |
| 640 | } |
| 641 | switch (*(current+1)&0xff) { |
| 642 | case DO: |
| 643 | case DONT: |
| 644 | case WILL: |
| 645 | case WONT: |
| 646 | return current+3; |
| 647 | case SB: /* loop forever looking for the SE */ |
| 648 | { |
| 649 | register char *look = current+2; |
| 650 | |
| 651 | for (;;) { |
| 652 | if ((*look++&0xff) == IAC) { |
| 653 | if ((*look++&0xff) == SE) { |
| 654 | return look; |
| 655 | } |
| 656 | } |
| 657 | } |
| 658 | } |
| 659 | default: |
| 660 | return current+2; |
| 661 | } |
| 662 | } |
| 663 | /* |
| 664 | * netclear() |
| 665 | * |
| 666 | * We are about to do a TELNET SYNCH operation. Clear |
| 667 | * the path to the network. |
| 668 | * |
| 669 | * Things are a bit tricky since we may have sent the first |
| 670 | * byte or so of a previous TELNET command into the network. |
| 671 | * So, we have to scan the network buffer from the beginning |
| 672 | * until we are up to where we want to be. |
| 673 | * |
| 674 | * A side effect of what we do, just to keep things |
| 675 | * simple, is to clear the urgent data pointer. The principal |
| 676 | * caller should be setting the urgent data pointer AFTER calling |
| 677 | * us in any case. |
| 678 | */ |
| 679 | |
| 680 | static void |
| 681 | netclear() |
| 682 | { |
| 683 | register char *thisitem, *next; |
| 684 | char *good; |
| 685 | #define wewant(p) ((nfrontp > p) && ((*p&0xff) == IAC) && \ |
| 686 | ((*(p+1)&0xff) != EC) && ((*(p+1)&0xff) != EL)) |
| 687 | |
| 688 | thisitem = netobuf; |
| 689 | |
| 690 | while ((next = nextitem(thisitem)) <= nbackp) { |
| 691 | thisitem = next; |
| 692 | } |
| 693 | |
| 694 | /* Now, thisitem is first before/at boundary. */ |
| 695 | |
| 696 | good = netobuf; /* where the good bytes go */ |
| 697 | |
| 698 | while (nfrontp > thisitem) { |
| 699 | if (wewant(thisitem)) { |
| 700 | int length; |
| 701 | |
| 702 | next = thisitem; |
| 703 | do { |
| 704 | next = nextitem(next); |
| 705 | } while (wewant(next) && (nfrontp > next)); |
| 706 | length = next-thisitem; |
| 707 | bcopy(thisitem, good, length); |
| 708 | good += length; |
| 709 | thisitem = next; |
| 710 | } else { |
| 711 | thisitem = nextitem(thisitem); |
| 712 | } |
| 713 | } |
| 714 | |
| 715 | nbackp = netobuf; |
| 716 | nfrontp = good; /* next byte to be sent */ |
| 717 | neturg = 0; |
| 718 | } |
| 719 | \f |
| 720 | /* |
| 721 | * These routines add various telnet commands to the data stream. |
| 722 | */ |
| 723 | |
| 724 | #if defined(NOT43) |
| 725 | static int |
| 726 | #else /* defined(NOT43) */ |
| 727 | static void |
| 728 | #endif /* defined(NOT43) */ |
| 729 | dosynch() |
| 730 | { |
| 731 | netclear(); /* clear the path to the network */ |
| 732 | NET2ADD(IAC, DM); |
| 733 | neturg = NETLOC()-1; /* Some systems are off by one XXX */ |
| 734 | |
| 735 | #if defined(NOT43) |
| 736 | return 0; |
| 737 | #endif /* defined(NOT43) */ |
| 738 | } |
| 739 | |
| 740 | static void |
| 741 | doflush() |
| 742 | { |
| 743 | NET2ADD(IAC, DO); |
| 744 | NETADD(TELOPT_TM); |
| 745 | flushline = 1; |
| 746 | flushout = 1; |
| 747 | ttyflush(); |
| 748 | /* do printoption AFTER flush, otherwise the output gets tossed... */ |
| 749 | printoption("<SENT", doopt, TELOPT_TM, 0); |
| 750 | } |
| 751 | |
| 752 | static void |
| 753 | intp() |
| 754 | { |
| 755 | NET2ADD(IAC, IP); |
| 756 | if (autoflush) { |
| 757 | doflush(); |
| 758 | } |
| 759 | if (autosynch) { |
| 760 | dosynch(); |
| 761 | } |
| 762 | } |
| 763 | |
| 764 | static void |
| 765 | sendbrk() |
| 766 | { |
| 767 | NET2ADD(IAC, BREAK); |
| 768 | if (autoflush) { |
| 769 | doflush(); |
| 770 | } |
| 771 | if (autosynch) { |
| 772 | dosynch(); |
| 773 | } |
| 774 | } |
| 775 | \f |
| 776 | /* |
| 777 | * Send as much data as possible to the terminal. |
| 778 | * |
| 779 | * The return value indicates whether we did any |
| 780 | * useful work. |
| 781 | */ |
| 782 | |
| 783 | |
| 784 | static int |
| 785 | ttyflush() |
| 786 | { |
| 787 | int n; |
| 788 | |
| 789 | if ((n = tfrontp - tbackp) > 0) { |
| 790 | if (!(SYNCHing||flushout)) { |
| 791 | n = write(tout, tbackp, n); |
| 792 | } else { |
| 793 | ioctl(fileno(stdout), TIOCFLUSH, (char *) 0); |
| 794 | /* we leave 'n' alone! */ |
| 795 | } |
| 796 | } |
| 797 | if (n >= 0) { |
| 798 | tbackp += n; |
| 799 | if (tbackp == tfrontp) { |
| 800 | tbackp = tfrontp = ttyobuf; |
| 801 | } |
| 802 | } |
| 803 | return n > 0; |
| 804 | } |
| 805 | |
| 806 | #if defined(TN3270) |
| 807 | |
| 808 | #if defined(unix) |
| 809 | static void |
| 810 | inputAvailable() |
| 811 | { |
| 812 | HaveInput = 1; |
| 813 | } |
| 814 | #endif /* defined(unix) */ |
| 815 | |
| 816 | void |
| 817 | outputPurge() |
| 818 | { |
| 819 | int tmp = flushout; |
| 820 | |
| 821 | flushout = 1; |
| 822 | |
| 823 | ttyflush(); |
| 824 | |
| 825 | flushout = tmp; |
| 826 | } |
| 827 | |
| 828 | #endif /* defined(TN3270) */ |
| 829 | \f |
| 830 | #if defined(unix) |
| 831 | /* |
| 832 | * Various signal handling routines. |
| 833 | */ |
| 834 | |
| 835 | static void |
| 836 | deadpeer() |
| 837 | { |
| 838 | setcommandmode(); |
| 839 | longjmp(peerdied, -1); |
| 840 | } |
| 841 | |
| 842 | static void |
| 843 | intr() |
| 844 | { |
| 845 | if (localchars) { |
| 846 | intp(); |
| 847 | return; |
| 848 | } |
| 849 | setcommandmode(); |
| 850 | longjmp(toplevel, -1); |
| 851 | } |
| 852 | |
| 853 | static void |
| 854 | intr2() |
| 855 | { |
| 856 | if (localchars) { |
| 857 | sendbrk(); |
| 858 | return; |
| 859 | } |
| 860 | } |
| 861 | |
| 862 | static void |
| 863 | doescape() |
| 864 | { |
| 865 | command(0); |
| 866 | } |
| 867 | #endif /* defined(unix) */ |
| 868 | \f |
| 869 | static int globalmode = 0; |
| 870 | /* Various modes */ |
| 871 | #define MODE_LINE(m) (modelist[m].modetype & LINE) |
| 872 | #define MODE_LOCAL_CHARS(m) (modelist[m].modetype & LOCAL_CHARS) |
| 873 | |
| 874 | #define LOCAL_CHARS 0x01 /* Characters processed locally */ |
| 875 | #define LINE 0x02 /* Line-by-line mode of operation */ |
| 876 | |
| 877 | static struct { |
| 878 | char *modedescriptions; |
| 879 | char modetype; |
| 880 | } modelist[] = { |
| 881 | { "telnet command mode", 0 }, |
| 882 | { "character-at-a-time mode", 0 }, |
| 883 | { "character-at-a-time mode (local echo)", LOCAL_CHARS }, |
| 884 | { "line-by-line mode (remote echo)", LINE | LOCAL_CHARS }, |
| 885 | { "line-by-line mode", LINE | LOCAL_CHARS }, |
| 886 | { "line-by-line mode (local echoing suppressed)", LINE | LOCAL_CHARS }, |
| 887 | { "3270 mode", 0 }, |
| 888 | }; |
| 889 | /* |
| 890 | * Mode - set up terminal to a specific mode. |
| 891 | */ |
| 892 | |
| 893 | |
| 894 | static void |
| 895 | mode(f) |
| 896 | register int f; |
| 897 | { |
| 898 | static int prevmode = 0; |
| 899 | struct tchars *tc; |
| 900 | struct tchars tc3; |
| 901 | struct ltchars *ltc; |
| 902 | struct sgttyb sb; |
| 903 | int onoff; |
| 904 | #if defined(unix) |
| 905 | int old; |
| 906 | #endif /* defined(unix) */ |
| 907 | struct tchars notc2; |
| 908 | struct ltchars noltc2; |
| 909 | static struct tchars notc = { -1, -1, -1, -1, -1, -1 }; |
| 910 | static struct ltchars noltc = { -1, -1, -1, -1, -1, -1 }; |
| 911 | |
| 912 | globalmode = f; |
| 913 | if (prevmode == f) |
| 914 | return; |
| 915 | #if defined(unix) |
| 916 | old = prevmode; |
| 917 | #endif /* defined(unix) */ |
| 918 | prevmode = f; |
| 919 | sb = nttyb; |
| 920 | |
| 921 | switch (f) { |
| 922 | |
| 923 | case 0: |
| 924 | onoff = 0; |
| 925 | tc = &otc; |
| 926 | ltc = &oltc; |
| 927 | break; |
| 928 | |
| 929 | case 1: /* remote character processing, remote echo */ |
| 930 | case 2: /* remote character processing, local echo */ |
| 931 | case 6: /* 3270 mode - like 1, but with xon/xoff local */ |
| 932 | /* (might be nice to have "6" in telnet also...) */ |
| 933 | sb.sg_flags |= CBREAK; |
| 934 | if ((f == 1) || (f == 6)) { |
| 935 | sb.sg_flags &= ~(ECHO|CRMOD); |
| 936 | } else { |
| 937 | sb.sg_flags |= ECHO|CRMOD; |
| 938 | } |
| 939 | sb.sg_erase = sb.sg_kill = -1; |
| 940 | if (f == 6) { |
| 941 | tc = &tc3; |
| 942 | tc3 = notc; |
| 943 | /* get XON, XOFF characters */ |
| 944 | tc3.t_startc = otc.t_startc; |
| 945 | tc3.t_stopc = otc.t_stopc; |
| 946 | } else { |
| 947 | /* |
| 948 | * If user hasn't specified one way or the other, |
| 949 | * then default to not trapping signals. |
| 950 | */ |
| 951 | if (!donelclchars) { |
| 952 | localchars = 0; |
| 953 | } |
| 954 | if (localchars) { |
| 955 | notc2 = notc; |
| 956 | notc2.t_intrc = ntc.t_intrc; |
| 957 | notc2.t_quitc = ntc.t_quitc; |
| 958 | tc = ¬c2; |
| 959 | } else { |
| 960 | tc = ¬c; |
| 961 | } |
| 962 | } |
| 963 | ltc = &noltc; |
| 964 | onoff = 1; |
| 965 | break; |
| 966 | case 3: /* local character processing, remote echo */ |
| 967 | case 4: /* local character processing, local echo */ |
| 968 | case 5: /* local character processing, no echo */ |
| 969 | sb.sg_flags &= ~CBREAK; |
| 970 | sb.sg_flags |= CRMOD; |
| 971 | if (f == 4) |
| 972 | sb.sg_flags |= ECHO; |
| 973 | else |
| 974 | sb.sg_flags &= ~ECHO; |
| 975 | notc2 = ntc; |
| 976 | tc = ¬c2; |
| 977 | noltc2 = oltc; |
| 978 | ltc = &noltc2; |
| 979 | /* |
| 980 | * If user hasn't specified one way or the other, |
| 981 | * then default to trapping signals. |
| 982 | */ |
| 983 | if (!donelclchars) { |
| 984 | localchars = 1; |
| 985 | } |
| 986 | if (localchars) { |
| 987 | notc2.t_brkc = nltc.t_flushc; |
| 988 | noltc2.t_flushc = -1; |
| 989 | } else { |
| 990 | notc2.t_intrc = notc2.t_quitc = -1; |
| 991 | } |
| 992 | noltc2.t_suspc = escape; |
| 993 | noltc2.t_dsuspc = -1; |
| 994 | onoff = 1; |
| 995 | break; |
| 996 | |
| 997 | default: |
| 998 | return; |
| 999 | } |
| 1000 | ioctl(tin, TIOCSLTC, (char *)ltc); |
| 1001 | ioctl(tin, TIOCSETC, (char *)tc); |
| 1002 | ioctl(tin, TIOCSETP, (char *)&sb); |
| 1003 | #if (!defined(TN3270)) || ((!defined(NOT43)) || defined(PUTCHAR)) |
| 1004 | ioctl(tin, FIONBIO, (char *)&onoff); |
| 1005 | ioctl(tout, FIONBIO, (char *)&onoff); |
| 1006 | #endif /* (!defined(TN3270)) || ((!defined(NOT43)) || defined(PUTCHAR)) */ |
| 1007 | #if defined(TN3270) && !defined(DEBUG) |
| 1008 | ioctl(tin, FIOASYNC, (char *)&onoff); |
| 1009 | #endif /* defined(TN3270) && !defined(DEBUG) */ |
| 1010 | |
| 1011 | #if defined(unix) |
| 1012 | if (MODE_LINE(f)) { |
| 1013 | signal(SIGTSTP, doescape); |
| 1014 | } else if (MODE_LINE(old)) { |
| 1015 | signal(SIGTSTP, SIG_DFL); |
| 1016 | sigsetmask(sigblock(0) & ~(1<<(SIGTSTP-1))); |
| 1017 | } |
| 1018 | #endif /* defined(unix) */ |
| 1019 | } |
| 1020 | \f |
| 1021 | /* |
| 1022 | * These routines decides on what the mode should be (based on the values |
| 1023 | * of various global variables). |
| 1024 | */ |
| 1025 | |
| 1026 | |
| 1027 | static |
| 1028 | getconnmode() |
| 1029 | { |
| 1030 | static char newmode[16] = |
| 1031 | { 4, 5, 3, 3, 2, 2, 1, 1, 6, 6, 6, 6, 6, 6, 6, 6 }; |
| 1032 | int modeindex = 0; |
| 1033 | |
| 1034 | if (dontlecho && (clocks.echotoggle > clocks.modenegotiated)) { |
| 1035 | modeindex += 1; |
| 1036 | } |
| 1037 | if (hisopts[TELOPT_ECHO]) { |
| 1038 | modeindex += 2; |
| 1039 | } |
| 1040 | if (hisopts[TELOPT_SGA]) { |
| 1041 | modeindex += 4; |
| 1042 | } |
| 1043 | if (In3270) { |
| 1044 | modeindex += 8; |
| 1045 | } |
| 1046 | return newmode[modeindex]; |
| 1047 | } |
| 1048 | |
| 1049 | void |
| 1050 | setconnmode() |
| 1051 | { |
| 1052 | mode(getconnmode()); |
| 1053 | } |
| 1054 | |
| 1055 | |
| 1056 | void |
| 1057 | setcommandmode() |
| 1058 | { |
| 1059 | mode(0); |
| 1060 | } |
| 1061 | \f |
| 1062 | static void |
| 1063 | willoption(option, reply) |
| 1064 | int option, reply; |
| 1065 | { |
| 1066 | char *fmt; |
| 1067 | |
| 1068 | switch (option) { |
| 1069 | |
| 1070 | # if defined(TN3270) |
| 1071 | case TELOPT_EOR: |
| 1072 | case TELOPT_BINARY: |
| 1073 | #endif /* defined(TN3270) */ |
| 1074 | case TELOPT_ECHO: |
| 1075 | case TELOPT_SGA: |
| 1076 | settimer(modenegotiated); |
| 1077 | hisopts[option] = 1; |
| 1078 | fmt = doopt; |
| 1079 | setconnmode(); /* possibly set new tty mode */ |
| 1080 | break; |
| 1081 | |
| 1082 | case TELOPT_TM: |
| 1083 | return; /* Never reply to TM will's/wont's */ |
| 1084 | |
| 1085 | default: |
| 1086 | fmt = dont; |
| 1087 | break; |
| 1088 | } |
| 1089 | sprintf(nfrontp, fmt, option); |
| 1090 | nfrontp += sizeof (dont) - 2; |
| 1091 | if (reply) |
| 1092 | printoption(">SENT", fmt, option, reply); |
| 1093 | else |
| 1094 | printoption("<SENT", fmt, option, reply); |
| 1095 | } |
| 1096 | |
| 1097 | static void |
| 1098 | wontoption(option, reply) |
| 1099 | int option, reply; |
| 1100 | { |
| 1101 | char *fmt; |
| 1102 | |
| 1103 | switch (option) { |
| 1104 | |
| 1105 | case TELOPT_ECHO: |
| 1106 | case TELOPT_SGA: |
| 1107 | settimer(modenegotiated); |
| 1108 | hisopts[option] = 0; |
| 1109 | fmt = dont; |
| 1110 | setconnmode(); /* Set new tty mode */ |
| 1111 | break; |
| 1112 | |
| 1113 | case TELOPT_TM: |
| 1114 | return; /* Never reply to TM will's/wont's */ |
| 1115 | |
| 1116 | default: |
| 1117 | fmt = dont; |
| 1118 | } |
| 1119 | sprintf(nfrontp, fmt, option); |
| 1120 | nfrontp += sizeof (doopt) - 2; |
| 1121 | if (reply) |
| 1122 | printoption(">SENT", fmt, option, reply); |
| 1123 | else |
| 1124 | printoption("<SENT", fmt, option, reply); |
| 1125 | } |
| 1126 | |
| 1127 | static void |
| 1128 | dooption(option) |
| 1129 | int option; |
| 1130 | { |
| 1131 | char *fmt; |
| 1132 | |
| 1133 | switch (option) { |
| 1134 | |
| 1135 | case TELOPT_TM: |
| 1136 | fmt = will; |
| 1137 | break; |
| 1138 | |
| 1139 | # if defined(TN3270) |
| 1140 | case TELOPT_EOR: |
| 1141 | case TELOPT_BINARY: |
| 1142 | # endif /* defined(TN3270) */ |
| 1143 | case TELOPT_TTYPE: /* terminal type option */ |
| 1144 | case TELOPT_SGA: /* no big deal */ |
| 1145 | fmt = will; |
| 1146 | myopts[option] = 1; |
| 1147 | break; |
| 1148 | |
| 1149 | case TELOPT_ECHO: /* We're never going to echo... */ |
| 1150 | default: |
| 1151 | fmt = wont; |
| 1152 | break; |
| 1153 | } |
| 1154 | sprintf(nfrontp, fmt, option); |
| 1155 | nfrontp += sizeof (doopt) - 2; |
| 1156 | printoption(">SENT", fmt, option, 0); |
| 1157 | } |
| 1158 | |
| 1159 | /* |
| 1160 | * suboption() |
| 1161 | * |
| 1162 | * Look at the sub-option buffer, and try to be helpful to the other |
| 1163 | * side. |
| 1164 | * |
| 1165 | * Currently we recognize: |
| 1166 | * |
| 1167 | * Terminal type, send request. |
| 1168 | */ |
| 1169 | |
| 1170 | static void |
| 1171 | suboption() |
| 1172 | { |
| 1173 | printsub("<", subbuffer, subend-subbuffer+1); |
| 1174 | switch (subbuffer[0]&0xff) { |
| 1175 | case TELOPT_TTYPE: |
| 1176 | if ((subbuffer[1]&0xff) != TELQUAL_SEND) { |
| 1177 | ; |
| 1178 | } else { |
| 1179 | char *name; |
| 1180 | char namebuf[41]; |
| 1181 | extern char *getenv(); |
| 1182 | int len; |
| 1183 | |
| 1184 | #if defined(TN3270) |
| 1185 | /* |
| 1186 | * Try to send a 3270 type terminal name. Decide which one base |
| 1187 | * on the format of our screen, and (in the future) color |
| 1188 | * capaiblities. |
| 1189 | */ |
| 1190 | if ((initscr() != ERR) && /* Initialize curses to get line size */ |
| 1191 | (LINES >= 24) && (COLS >= 80)) { |
| 1192 | Sent3270TerminalType = 1; |
| 1193 | if ((LINES >= 27) && (COLS >= 132)) { |
| 1194 | MaxNumberLines = 27; |
| 1195 | MaxNumberColumns = 132; |
| 1196 | sb_terminal[SBTERMMODEL] = '5'; |
| 1197 | } else if (LINES >= 43) { |
| 1198 | MaxNumberLines = 43; |
| 1199 | MaxNumberColumns = 80; |
| 1200 | sb_terminal[SBTERMMODEL] = '4'; |
| 1201 | } else if (LINES >= 32) { |
| 1202 | MaxNumberLines = 32; |
| 1203 | MaxNumberColumns = 80; |
| 1204 | sb_terminal[SBTERMMODEL] = '3'; |
| 1205 | } else { |
| 1206 | MaxNumberLines = 24; |
| 1207 | MaxNumberColumns = 80; |
| 1208 | sb_terminal[SBTERMMODEL] = '2'; |
| 1209 | } |
| 1210 | NumberLines = 24; /* before we start out... */ |
| 1211 | NumberColumns = 80; |
| 1212 | ScreenSize = NumberLines*NumberColumns; |
| 1213 | if ((MaxNumberLines*MaxNumberColumns) > MAXSCREENSIZE) { |
| 1214 | ExitString(stderr, |
| 1215 | "Programming error: MAXSCREENSIZE too small.\n", 1); |
| 1216 | /*NOTREACHED*/ |
| 1217 | } |
| 1218 | bcopy(sb_terminal, nfrontp, sizeof sb_terminal); |
| 1219 | printsub(">", nfrontp+2, sizeof sb_terminal-2); |
| 1220 | nfrontp += sizeof sb_terminal; |
| 1221 | return; |
| 1222 | } |
| 1223 | #endif /* defined(TN3270) */ |
| 1224 | |
| 1225 | name = getenv("TERM"); |
| 1226 | if ((name == 0) || ((len = strlen(name)) > 40)) { |
| 1227 | name = "UNKNOWN"; |
| 1228 | } |
| 1229 | if ((len + 4+2) < NETROOM()) { |
| 1230 | strcpy(namebuf, name); |
| 1231 | upcase(namebuf); |
| 1232 | sprintf(nfrontp, "%c%c%c%c%s%c%c", IAC, SB, TELOPT_TTYPE, |
| 1233 | TELQUAL_IS, namebuf, IAC, SE); |
| 1234 | printsub(">", nfrontp+2, 4+strlen(namebuf)+2-2-2); |
| 1235 | nfrontp += 4+strlen(namebuf)+2; |
| 1236 | } else { |
| 1237 | ExitString(stderr, "No room in buffer for terminal type.\n", |
| 1238 | 1); |
| 1239 | /*NOTREACHED*/ |
| 1240 | } |
| 1241 | } |
| 1242 | |
| 1243 | default: |
| 1244 | break; |
| 1245 | } |
| 1246 | } |
| 1247 | |
| 1248 | #if defined(TN3270) |
| 1249 | static void |
| 1250 | SetIn3270() |
| 1251 | { |
| 1252 | if (Sent3270TerminalType && myopts[TELOPT_BINARY] |
| 1253 | && hisopts[TELOPT_BINARY]) { |
| 1254 | if (!In3270) { |
| 1255 | In3270 = 1; |
| 1256 | OptInit(); /* initialize mappings */ |
| 1257 | /* initialize terminal key mapping */ |
| 1258 | (void) DataFromTerminal(ttyobuf, 0); |
| 1259 | StartScreen(); /* Start terminal going */ |
| 1260 | setconnmode(); |
| 1261 | } |
| 1262 | } else { |
| 1263 | if (In3270) { |
| 1264 | StopScreen(1); |
| 1265 | In3270 = 0; |
| 1266 | setconnmode(); |
| 1267 | } |
| 1268 | } |
| 1269 | } |
| 1270 | #endif /* defined(TN3270) */ |
| 1271 | \f |
| 1272 | /* |
| 1273 | * Telnet receiver states for fsm |
| 1274 | */ |
| 1275 | #define TS_DATA 0 |
| 1276 | #define TS_IAC 1 |
| 1277 | #define TS_WILL 2 |
| 1278 | #define TS_WONT 3 |
| 1279 | #define TS_DO 4 |
| 1280 | #define TS_DONT 5 |
| 1281 | #define TS_CR 6 |
| 1282 | #define TS_SB 7 /* sub-option collection */ |
| 1283 | #define TS_SE 8 /* looking for sub-option end */ |
| 1284 | |
| 1285 | static void |
| 1286 | telrcv() |
| 1287 | { |
| 1288 | register int c; |
| 1289 | static int state = TS_DATA; |
| 1290 | # if defined(TN3270) |
| 1291 | register int Scc; |
| 1292 | register char *Sbp; |
| 1293 | # endif /* defined(TN3270) */ |
| 1294 | |
| 1295 | while ((scc > 0) && (TTYROOM() > 2)) { |
| 1296 | c = *sbp++ & 0xff, scc--; |
| 1297 | switch (state) { |
| 1298 | |
| 1299 | case TS_CR: |
| 1300 | state = TS_DATA; |
| 1301 | if (c == '\0') { |
| 1302 | break; /* Ignore \0 after CR */ |
| 1303 | } else if (c == '\n') { |
| 1304 | if (hisopts[TELOPT_ECHO] && !crmod) { |
| 1305 | TTYADD(c); |
| 1306 | } |
| 1307 | break; |
| 1308 | } |
| 1309 | /* Else, fall through */ |
| 1310 | |
| 1311 | case TS_DATA: |
| 1312 | if (c == IAC) { |
| 1313 | state = TS_IAC; |
| 1314 | continue; |
| 1315 | } |
| 1316 | # if defined(TN3270) |
| 1317 | if (In3270) { |
| 1318 | *Ifrontp++ = c; |
| 1319 | Sbp = sbp; |
| 1320 | Scc = scc; |
| 1321 | while (Scc > 0) { |
| 1322 | c = *Sbp++ & 0377, Scc--; |
| 1323 | if (c == IAC) { |
| 1324 | state = TS_IAC; |
| 1325 | break; |
| 1326 | } |
| 1327 | *Ifrontp++ = c; |
| 1328 | } |
| 1329 | sbp = Sbp; |
| 1330 | scc = Scc; |
| 1331 | } else |
| 1332 | # endif /* defined(TN3270) */ |
| 1333 | /* |
| 1334 | * The 'crmod' hack (see following) is needed |
| 1335 | * since we can't * set CRMOD on output only. |
| 1336 | * Machines like MULTICS like to send \r without |
| 1337 | * \n; since we must turn off CRMOD to get proper |
| 1338 | * input, the mapping is done here (sigh). |
| 1339 | */ |
| 1340 | if (c == '\r') { |
| 1341 | if (scc > 0) { |
| 1342 | c = *sbp&0xff; |
| 1343 | if (c == 0) { |
| 1344 | sbp++, scc--; |
| 1345 | /* a "true" CR */ |
| 1346 | TTYADD('\r'); |
| 1347 | } else if (!hisopts[TELOPT_ECHO] && |
| 1348 | (c == '\n')) { |
| 1349 | sbp++, scc--; |
| 1350 | TTYADD('\n'); |
| 1351 | } else { |
| 1352 | TTYADD('\r'); |
| 1353 | if (crmod) { |
| 1354 | TTYADD('\n'); |
| 1355 | } |
| 1356 | } |
| 1357 | } else { |
| 1358 | state = TS_CR; |
| 1359 | TTYADD('\r'); |
| 1360 | if (crmod) { |
| 1361 | TTYADD('\n'); |
| 1362 | } |
| 1363 | } |
| 1364 | } else { |
| 1365 | TTYADD(c); |
| 1366 | } |
| 1367 | continue; |
| 1368 | |
| 1369 | case TS_IAC: |
| 1370 | switch (c) { |
| 1371 | |
| 1372 | case WILL: |
| 1373 | state = TS_WILL; |
| 1374 | continue; |
| 1375 | |
| 1376 | case WONT: |
| 1377 | state = TS_WONT; |
| 1378 | continue; |
| 1379 | |
| 1380 | case DO: |
| 1381 | state = TS_DO; |
| 1382 | continue; |
| 1383 | |
| 1384 | case DONT: |
| 1385 | state = TS_DONT; |
| 1386 | continue; |
| 1387 | |
| 1388 | case DM: |
| 1389 | /* |
| 1390 | * We may have missed an urgent notification, |
| 1391 | * so make sure we flush whatever is in the |
| 1392 | * buffer currently. |
| 1393 | */ |
| 1394 | SYNCHing = 1; |
| 1395 | ttyflush(); |
| 1396 | SYNCHing = stilloob(net); |
| 1397 | settimer(gotDM); |
| 1398 | break; |
| 1399 | |
| 1400 | case NOP: |
| 1401 | case GA: |
| 1402 | break; |
| 1403 | |
| 1404 | case SB: |
| 1405 | SB_CLEAR(); |
| 1406 | state = TS_SB; |
| 1407 | continue; |
| 1408 | |
| 1409 | # if defined(TN3270) |
| 1410 | case EOR: |
| 1411 | if (In3270) { |
| 1412 | Ibackp += DataFromNetwork(Ibackp, Ifrontp-Ibackp, 1); |
| 1413 | if (Ibackp == Ifrontp) { |
| 1414 | Ibackp = Ifrontp = Ibuf; |
| 1415 | ISend = 0; /* should have been! */ |
| 1416 | } else { |
| 1417 | ISend = 1; |
| 1418 | } |
| 1419 | } |
| 1420 | break; |
| 1421 | # endif /* defined(TN3270) */ |
| 1422 | |
| 1423 | case IAC: |
| 1424 | # if !defined(TN3270) |
| 1425 | TTYADD(IAC); |
| 1426 | # else /* !defined(TN3270) */ |
| 1427 | if (In3270) { |
| 1428 | *Ifrontp++ = IAC; |
| 1429 | } else { |
| 1430 | TTYADD(IAC); |
| 1431 | } |
| 1432 | # endif /* !defined(TN3270) */ |
| 1433 | break; |
| 1434 | |
| 1435 | default: |
| 1436 | break; |
| 1437 | } |
| 1438 | state = TS_DATA; |
| 1439 | continue; |
| 1440 | |
| 1441 | case TS_WILL: |
| 1442 | printoption(">RCVD", will, c, !hisopts[c]); |
| 1443 | if (c == TELOPT_TM) { |
| 1444 | if (flushout) { |
| 1445 | flushout = 0; |
| 1446 | } |
| 1447 | } else if (!hisopts[c]) { |
| 1448 | willoption(c, 1); |
| 1449 | } |
| 1450 | SetIn3270(); |
| 1451 | state = TS_DATA; |
| 1452 | continue; |
| 1453 | |
| 1454 | case TS_WONT: |
| 1455 | printoption(">RCVD", wont, c, hisopts[c]); |
| 1456 | if (c == TELOPT_TM) { |
| 1457 | if (flushout) { |
| 1458 | flushout = 0; |
| 1459 | } |
| 1460 | } else if (hisopts[c]) { |
| 1461 | wontoption(c, 1); |
| 1462 | } |
| 1463 | SetIn3270(); |
| 1464 | state = TS_DATA; |
| 1465 | continue; |
| 1466 | |
| 1467 | case TS_DO: |
| 1468 | printoption(">RCVD", doopt, c, !myopts[c]); |
| 1469 | if (!myopts[c]) |
| 1470 | dooption(c); |
| 1471 | SetIn3270(); |
| 1472 | state = TS_DATA; |
| 1473 | continue; |
| 1474 | |
| 1475 | case TS_DONT: |
| 1476 | printoption(">RCVD", dont, c, myopts[c]); |
| 1477 | if (myopts[c]) { |
| 1478 | myopts[c] = 0; |
| 1479 | sprintf(nfrontp, wont, c); |
| 1480 | nfrontp += sizeof (wont) - 2; |
| 1481 | flushline = 1; |
| 1482 | setconnmode(); /* set new tty mode (maybe) */ |
| 1483 | printoption(">SENT", wont, c, 0); |
| 1484 | } |
| 1485 | SetIn3270(); |
| 1486 | state = TS_DATA; |
| 1487 | continue; |
| 1488 | |
| 1489 | case TS_SB: |
| 1490 | if (c == IAC) { |
| 1491 | state = TS_SE; |
| 1492 | } else { |
| 1493 | SB_ACCUM(c); |
| 1494 | } |
| 1495 | continue; |
| 1496 | |
| 1497 | case TS_SE: |
| 1498 | if (c != SE) { |
| 1499 | if (c != IAC) { |
| 1500 | SB_ACCUM(IAC); |
| 1501 | } |
| 1502 | SB_ACCUM(c); |
| 1503 | state = TS_SB; |
| 1504 | } else { |
| 1505 | SB_TERM(); |
| 1506 | suboption(); /* handle sub-option */ |
| 1507 | SetIn3270(); |
| 1508 | state = TS_DATA; |
| 1509 | } |
| 1510 | } |
| 1511 | } |
| 1512 | } |
| 1513 | \f |
| 1514 | #if defined(TN3270) |
| 1515 | |
| 1516 | /* |
| 1517 | * The following routines are places where the various tn3270 |
| 1518 | * routines make calls into telnet.c. |
| 1519 | */ |
| 1520 | |
| 1521 | /* TtyChars() - returns the number of characters in the TTY buffer */ |
| 1522 | TtyChars() |
| 1523 | { |
| 1524 | return(tfrontp-tbackp); |
| 1525 | } |
| 1526 | |
| 1527 | /* |
| 1528 | * DataToNetwork - queue up some data to go to network. If "done" is set, |
| 1529 | * then when last byte is queued, we add on an IAC EOR sequence (so, |
| 1530 | * don't call us with "done" until you want that done...) |
| 1531 | * |
| 1532 | * We actually do send all the data to the network buffer, since our |
| 1533 | * only client needs for us to do that. |
| 1534 | */ |
| 1535 | |
| 1536 | int |
| 1537 | DataToNetwork(buffer, count, done) |
| 1538 | register char *buffer; /* where the data is */ |
| 1539 | register int count; /* how much to send */ |
| 1540 | int done; /* is this the last of a logical block */ |
| 1541 | { |
| 1542 | register int c; |
| 1543 | int origCount; |
| 1544 | fd_set o; |
| 1545 | |
| 1546 | origCount = count; |
| 1547 | FD_ZERO(&o); |
| 1548 | |
| 1549 | while (count) { |
| 1550 | if ((netobuf+sizeof netobuf - nfrontp) < 6) { |
| 1551 | netflush(); |
| 1552 | while ((netobuf+sizeof netobuf - nfrontp) < 6) { |
| 1553 | FD_SET(net, &o); |
| 1554 | (void) select(net+1, (fd_set *) 0, &o, (fd_set *) 0, |
| 1555 | (struct timeval *) 0); |
| 1556 | netflush(); |
| 1557 | } |
| 1558 | } |
| 1559 | c = *buffer++; |
| 1560 | count--; |
| 1561 | if (c == IAC) { |
| 1562 | *nfrontp++ = IAC; |
| 1563 | *nfrontp++ = IAC; |
| 1564 | } else { |
| 1565 | *nfrontp++ = c; |
| 1566 | } |
| 1567 | } |
| 1568 | |
| 1569 | if (done && !count) { |
| 1570 | *nfrontp++ = IAC; |
| 1571 | *nfrontp++ = EOR; |
| 1572 | netflush(); /* try to move along as quickly as ... */ |
| 1573 | } |
| 1574 | return(origCount - count); |
| 1575 | } |
| 1576 | |
| 1577 | /* DataToTerminal - queue up some data to go to terminal. */ |
| 1578 | |
| 1579 | int |
| 1580 | DataToTerminal(buffer, count) |
| 1581 | register char *buffer; /* where the data is */ |
| 1582 | register int count; /* how much to send */ |
| 1583 | { |
| 1584 | int origCount; |
| 1585 | fd_set o; |
| 1586 | |
| 1587 | origCount = count; |
| 1588 | FD_ZERO(&o); |
| 1589 | |
| 1590 | while (count) { |
| 1591 | if (tfrontp >= ttyobuf+sizeof ttyobuf) { |
| 1592 | ttyflush(); |
| 1593 | while (tfrontp >= ttyobuf+sizeof ttyobuf) { |
| 1594 | FD_SET(tout, &o); |
| 1595 | (void) select(tout+1, (fd_set *) 0, &o, (fd_set *) 0, |
| 1596 | (struct timeval *) 0); |
| 1597 | ttyflush(); |
| 1598 | } |
| 1599 | } |
| 1600 | *tfrontp++ = *buffer++; |
| 1601 | count--; |
| 1602 | } |
| 1603 | return(origCount - count); |
| 1604 | } |
| 1605 | |
| 1606 | /* EmptyTerminal - called to make sure that the terminal buffer is empty. |
| 1607 | * Note that we consider the buffer to run all the |
| 1608 | * way to the kernel (thus the select). |
| 1609 | */ |
| 1610 | |
| 1611 | void |
| 1612 | EmptyTerminal() |
| 1613 | { |
| 1614 | fd_set o; |
| 1615 | |
| 1616 | FD_ZERO(&o); |
| 1617 | |
| 1618 | if (tfrontp == tbackp) { |
| 1619 | FD_SET(tout, &o); |
| 1620 | (void) select(tout+1, (int *) 0, &o, (int *) 0, |
| 1621 | (struct timeval *) 0); /* wait for TTLOWAT */ |
| 1622 | } else { |
| 1623 | while (tfrontp != tbackp) { |
| 1624 | ttyflush(); |
| 1625 | FD_SET(tout, &o); |
| 1626 | (void) select(tout+1, (int *) 0, &o, (int *) 0, |
| 1627 | (struct timeval *) 0); /* wait for TTLOWAT */ |
| 1628 | } |
| 1629 | } |
| 1630 | } |
| 1631 | |
| 1632 | /* |
| 1633 | * Push3270 - Try to send data along the 3270 output (to screen) direction. |
| 1634 | */ |
| 1635 | |
| 1636 | static int |
| 1637 | Push3270() |
| 1638 | { |
| 1639 | int save = scc; |
| 1640 | |
| 1641 | if (scc) { |
| 1642 | if (Ifrontp+scc > Ibuf+sizeof Ibuf) { |
| 1643 | if (Ibackp != Ibuf) { |
| 1644 | bcopy(Ibackp, Ibuf, Ifrontp-Ibackp); |
| 1645 | Ifrontp -= (Ibackp-Ibuf); |
| 1646 | Ibackp = Ibuf; |
| 1647 | } |
| 1648 | } |
| 1649 | if (Ifrontp+scc < Ibuf+sizeof Ibuf) { |
| 1650 | telrcv(); |
| 1651 | } |
| 1652 | } |
| 1653 | return save != scc; |
| 1654 | } |
| 1655 | |
| 1656 | |
| 1657 | /* |
| 1658 | * Finish3270 - get the last dregs of 3270 data out to the terminal |
| 1659 | * before quitting. |
| 1660 | */ |
| 1661 | |
| 1662 | static void |
| 1663 | Finish3270() |
| 1664 | { |
| 1665 | while (Push3270() || !DoTerminalOutput()) { |
| 1666 | ; |
| 1667 | } |
| 1668 | } |
| 1669 | |
| 1670 | |
| 1671 | |
| 1672 | /* StringToTerminal - output a null terminated string to the terminal */ |
| 1673 | |
| 1674 | void |
| 1675 | StringToTerminal(s) |
| 1676 | char *s; |
| 1677 | { |
| 1678 | int count; |
| 1679 | |
| 1680 | count = strlen(s); |
| 1681 | if (count) { |
| 1682 | (void) DataToTerminal(s, count); /* we know it always goes... */ |
| 1683 | } |
| 1684 | } |
| 1685 | |
| 1686 | |
| 1687 | #if defined(TN3270) && ((!defined(NOT43)) || defined(PUTCHAR)) |
| 1688 | /* _putchar - output a single character to the terminal. This name is so that |
| 1689 | * curses(3x) can call us to send out data. |
| 1690 | */ |
| 1691 | |
| 1692 | void |
| 1693 | _putchar(c) |
| 1694 | char c; |
| 1695 | { |
| 1696 | if (tfrontp >= ttyobuf+sizeof ttyobuf) { |
| 1697 | (void) DataToTerminal(&c, 1); |
| 1698 | } else { |
| 1699 | *tfrontp++ = c; /* optimize if possible. */ |
| 1700 | } |
| 1701 | } |
| 1702 | #endif /* defined(TN3270) && ((!defined(NOT43)) || defined(PUTCHAR)) */ |
| 1703 | \f |
| 1704 | static void |
| 1705 | SetForExit() |
| 1706 | { |
| 1707 | setconnmode(); |
| 1708 | if (In3270) { |
| 1709 | Finish3270(); |
| 1710 | } |
| 1711 | setcommandmode(); |
| 1712 | fflush(stdout); |
| 1713 | fflush(stderr); |
| 1714 | if (In3270) { |
| 1715 | StopScreen(1); |
| 1716 | } |
| 1717 | setconnmode(); |
| 1718 | setcommandmode(); |
| 1719 | } |
| 1720 | |
| 1721 | static void |
| 1722 | Exit(returnCode) |
| 1723 | int returnCode; |
| 1724 | { |
| 1725 | SetForExit(); |
| 1726 | exit(returnCode); |
| 1727 | } |
| 1728 | |
| 1729 | void |
| 1730 | ExitString(file, string, returnCode) |
| 1731 | FILE *file; |
| 1732 | char *string; |
| 1733 | int returnCode; |
| 1734 | { |
| 1735 | SetForExit(); |
| 1736 | fwrite(string, 1, strlen(string), file); |
| 1737 | exit(returnCode); |
| 1738 | } |
| 1739 | |
| 1740 | void |
| 1741 | ExitPerror(string, returnCode) |
| 1742 | char *string; |
| 1743 | int returnCode; |
| 1744 | { |
| 1745 | SetForExit(); |
| 1746 | perror(string); |
| 1747 | exit(returnCode); |
| 1748 | } |
| 1749 | |
| 1750 | #endif /* defined(TN3270) */ |
| 1751 | \f |
| 1752 | static |
| 1753 | Scheduler(block) |
| 1754 | int block; /* should we block in the select ? */ |
| 1755 | { |
| 1756 | register int c; |
| 1757 | /* One wants to be a bit careful about setting returnValue |
| 1758 | * to one, since a one implies we did some useful work, |
| 1759 | * and therefore probably won't be called to block next |
| 1760 | * time (TN3270 mode only). |
| 1761 | */ |
| 1762 | int returnValue = 0; |
| 1763 | static struct timeval TimeValue = { 0 }; |
| 1764 | |
| 1765 | if (scc < 0 && tcc < 0) { |
| 1766 | return -1; |
| 1767 | } |
| 1768 | |
| 1769 | if ((!MODE_LINE(globalmode) || flushline) && NETBYTES()) { |
| 1770 | FD_SET(net, &obits); |
| 1771 | } |
| 1772 | if (TTYBYTES()) { |
| 1773 | FD_SET(tout, &obits); |
| 1774 | } |
| 1775 | if ((tcc == 0) && NETROOM()) { |
| 1776 | FD_SET(tin, &ibits); |
| 1777 | } |
| 1778 | # if !defined(TN3270) |
| 1779 | if (TTYROOM()) { |
| 1780 | FD_SET(net, &ibits); |
| 1781 | } |
| 1782 | # else /* !defined(TN3270) */ |
| 1783 | if (!ISend && TTYROOM()) { |
| 1784 | FD_SET(net, &ibits); |
| 1785 | } |
| 1786 | # endif /* !defined(TN3270) */ |
| 1787 | if (!SYNCHing) { |
| 1788 | FD_SET(net, &xbits); |
| 1789 | } |
| 1790 | # if defined(TN3270) && defined(unix) |
| 1791 | if (HaveInput) { |
| 1792 | HaveInput = 0; |
| 1793 | signal(SIGIO, inputAvailable); |
| 1794 | } |
| 1795 | #endif /* defined(TN3270) && defined(unix) */ |
| 1796 | if ((c = select(16, &ibits, &obits, &xbits, |
| 1797 | block? (struct timeval *)0 : &TimeValue)) < 1) { |
| 1798 | if (c == -1) { |
| 1799 | /* |
| 1800 | * we can get EINTR if we are in line mode, |
| 1801 | * and the user does an escape (TSTP), or |
| 1802 | * some other signal generator. |
| 1803 | */ |
| 1804 | if (errno == EINTR) { |
| 1805 | return 0; |
| 1806 | } |
| 1807 | # if defined(TN3270) |
| 1808 | /* |
| 1809 | * we can get EBADF if we were in transparent |
| 1810 | * mode, and the transcom process died. |
| 1811 | */ |
| 1812 | if (errno == EBADF) { |
| 1813 | /* |
| 1814 | * zero the bits (even though kernel does it) |
| 1815 | * to make sure we are selecting on the right |
| 1816 | * ones. |
| 1817 | */ |
| 1818 | FD_ZERO(&ibits); |
| 1819 | FD_ZERO(&obits); |
| 1820 | FD_ZERO(&xbits); |
| 1821 | return 0; |
| 1822 | } |
| 1823 | # endif /* defined(TN3270) */ |
| 1824 | /* I don't like this, does it ever happen? */ |
| 1825 | printf("sleep(5) from telnet, after select\r\n"); |
| 1826 | #if defined(unix) |
| 1827 | sleep(5); |
| 1828 | #endif /* defined(unix) */ |
| 1829 | } |
| 1830 | return 0; |
| 1831 | } |
| 1832 | |
| 1833 | /* |
| 1834 | * Any urgent data? |
| 1835 | */ |
| 1836 | if (FD_ISSET(net, &xbits)) { |
| 1837 | FD_CLR(net, &xbits); |
| 1838 | SYNCHing = 1; |
| 1839 | ttyflush(); /* flush already enqueued data */ |
| 1840 | } |
| 1841 | |
| 1842 | /* |
| 1843 | * Something to read from the network... |
| 1844 | */ |
| 1845 | if (FD_ISSET(net, &ibits)) { |
| 1846 | int canread; |
| 1847 | |
| 1848 | FD_CLR(net, &ibits); |
| 1849 | if (scc == 0) { |
| 1850 | sbp = sibuf; |
| 1851 | } |
| 1852 | canread = sibuf + sizeof sibuf - sbp; |
| 1853 | #if !defined(SO_OOBINLINE) |
| 1854 | /* |
| 1855 | * In 4.2 (and some early 4.3) systems, the |
| 1856 | * OOB indication and data handling in the kernel |
| 1857 | * is such that if two separate TCP Urgent requests |
| 1858 | * come in, one byte of TCP data will be overlaid. |
| 1859 | * This is fatal for Telnet, but we try to live |
| 1860 | * with it. |
| 1861 | * |
| 1862 | * In addition, in 4.2 (and...), a special protocol |
| 1863 | * is needed to pick up the TCP Urgent data in |
| 1864 | * the correct sequence. |
| 1865 | * |
| 1866 | * What we do is: if we think we are in urgent |
| 1867 | * mode, we look to see if we are "at the mark". |
| 1868 | * If we are, we do an OOB receive. If we run |
| 1869 | * this twice, we will do the OOB receive twice, |
| 1870 | * but the second will fail, since the second |
| 1871 | * time we were "at the mark", but there wasn't |
| 1872 | * any data there (the kernel doesn't reset |
| 1873 | * "at the mark" until we do a normal read). |
| 1874 | * Once we've read the OOB data, we go ahead |
| 1875 | * and do normal reads. |
| 1876 | * |
| 1877 | * There is also another problem, which is that |
| 1878 | * since the OOB byte we read doesn't put us |
| 1879 | * out of OOB state, and since that byte is most |
| 1880 | * likely the TELNET DM (data mark), we would |
| 1881 | * stay in the TELNET SYNCH (SYNCHing) state. |
| 1882 | * So, clocks to the rescue. If we've "just" |
| 1883 | * received a DM, then we test for the |
| 1884 | * presence of OOB data when the receive OOB |
| 1885 | * fails (and AFTER we did the normal mode read |
| 1886 | * to clear "at the mark"). |
| 1887 | */ |
| 1888 | if (SYNCHing) { |
| 1889 | int atmark; |
| 1890 | |
| 1891 | ioctl(net, SIOCATMARK, (char *)&atmark); |
| 1892 | if (atmark) { |
| 1893 | c = recv(net, sibuf, canread, MSG_OOB); |
| 1894 | if ((c == -1) && (errno == EINVAL)) { |
| 1895 | c = read(net, sibuf, canread); |
| 1896 | if (clocks.didnetreceive < clocks.gotDM) { |
| 1897 | SYNCHing = stilloob(net); |
| 1898 | } |
| 1899 | } |
| 1900 | } else { |
| 1901 | c = read(net, sibuf, canread); |
| 1902 | } |
| 1903 | } else { |
| 1904 | c = read(net, sibuf, canread); |
| 1905 | } |
| 1906 | settimer(didnetreceive); |
| 1907 | #else /* !defined(SO_OOBINLINE) */ |
| 1908 | c = read(net, sbp, canread); |
| 1909 | #endif /* !defined(SO_OOBINLINE) */ |
| 1910 | if (c < 0 && errno == EWOULDBLOCK) { |
| 1911 | c = 0; |
| 1912 | } else if (c <= 0) { |
| 1913 | return -1; |
| 1914 | } |
| 1915 | if (netdata) { |
| 1916 | Dump('<', sbp, c); |
| 1917 | } |
| 1918 | scc += c; |
| 1919 | returnValue = 1; |
| 1920 | } |
| 1921 | |
| 1922 | /* |
| 1923 | * Something to read from the tty... |
| 1924 | */ |
| 1925 | if (FD_ISSET(tin, &ibits)) { |
| 1926 | FD_CLR(tin, &ibits); |
| 1927 | if (tcc == 0) { |
| 1928 | tbp = tibuf; /* nothing left, reset */ |
| 1929 | } |
| 1930 | c = read(tin, tbp, tibuf+sizeof tibuf - tbp); |
| 1931 | if (c < 0 && errno == EWOULDBLOCK) { |
| 1932 | c = 0; |
| 1933 | } else { |
| 1934 | /* EOF detection for line mode!!!! */ |
| 1935 | if (c == 0 && MODE_LOCAL_CHARS(globalmode)) { |
| 1936 | /* must be an EOF... */ |
| 1937 | *tbp = ntc.t_eofc; |
| 1938 | c = 1; |
| 1939 | } |
| 1940 | if (c <= 0) { |
| 1941 | tcc = c; |
| 1942 | return -1; |
| 1943 | } |
| 1944 | } |
| 1945 | tcc += c; |
| 1946 | returnValue = 1; /* did something useful */ |
| 1947 | } |
| 1948 | |
| 1949 | # if defined(TN3270) |
| 1950 | if (tcc > 0) { |
| 1951 | if (In3270) { |
| 1952 | c = DataFromTerminal(tbp, tcc); |
| 1953 | if (c) { |
| 1954 | returnValue = 1; |
| 1955 | } |
| 1956 | tcc -= c; |
| 1957 | tbp += c; |
| 1958 | } else { |
| 1959 | # endif /* defined(TN3270) */ |
| 1960 | returnValue = 1; |
| 1961 | while (tcc > 0) { |
| 1962 | register int sc; |
| 1963 | |
| 1964 | if (NETROOM() < 2) { |
| 1965 | flushline = 1; |
| 1966 | break; |
| 1967 | } |
| 1968 | c = *tbp++ & 0xff, sc = strip(c), tcc--; |
| 1969 | if (sc == escape) { |
| 1970 | command(0); |
| 1971 | tcc = 0; |
| 1972 | flushline = 1; |
| 1973 | break; |
| 1974 | } else if (MODE_LINE(globalmode) && (sc == echoc)) { |
| 1975 | if (tcc > 0 && strip(*tbp) == echoc) { |
| 1976 | tbp++; |
| 1977 | tcc--; |
| 1978 | } else { |
| 1979 | dontlecho = !dontlecho; |
| 1980 | settimer(echotoggle); |
| 1981 | setconnmode(); |
| 1982 | tcc = 0; |
| 1983 | flushline = 1; |
| 1984 | break; |
| 1985 | } |
| 1986 | } |
| 1987 | if (localchars) { |
| 1988 | if (sc == ntc.t_intrc) { |
| 1989 | intp(); |
| 1990 | break; |
| 1991 | } else if (sc == ntc.t_quitc) { |
| 1992 | sendbrk(); |
| 1993 | break; |
| 1994 | } else if (sc == nltc.t_flushc) { |
| 1995 | NET2ADD(IAC, AO); |
| 1996 | if (autoflush) { |
| 1997 | doflush(); |
| 1998 | } |
| 1999 | break; |
| 2000 | } else if (MODE_LOCAL_CHARS(globalmode)) { |
| 2001 | ; |
| 2002 | } else if (sc == nttyb.sg_kill) { |
| 2003 | NET2ADD(IAC, EL); |
| 2004 | break; |
| 2005 | } else if (sc == nttyb.sg_erase) { |
| 2006 | NET2ADD(IAC, EC); |
| 2007 | break; |
| 2008 | } |
| 2009 | } |
| 2010 | switch (c) { |
| 2011 | case '\n': |
| 2012 | /* |
| 2013 | * If we are in CRMOD mode (\r ==> \n) |
| 2014 | * on our local machine, then probably |
| 2015 | * a newline (unix) is CRLF (TELNET). |
| 2016 | */ |
| 2017 | if (MODE_LOCAL_CHARS(globalmode)) { |
| 2018 | NETADD('\r'); |
| 2019 | } |
| 2020 | NETADD('\n'); |
| 2021 | flushline = 1; |
| 2022 | break; |
| 2023 | case '\r': |
| 2024 | NET2ADD('\r', '\0'); |
| 2025 | flushline = 1; |
| 2026 | break; |
| 2027 | case IAC: |
| 2028 | NET2ADD(IAC, IAC); |
| 2029 | break; |
| 2030 | default: |
| 2031 | NETADD(c); |
| 2032 | break; |
| 2033 | } |
| 2034 | } |
| 2035 | # if defined(TN3270) |
| 2036 | } |
| 2037 | } |
| 2038 | # endif /* defined(TN3270) */ |
| 2039 | |
| 2040 | if ((!MODE_LINE(globalmode) || flushline) && |
| 2041 | FD_ISSET(net, &obits) && (NETBYTES() > 0)) { |
| 2042 | FD_CLR(net, &obits); |
| 2043 | returnValue = netflush(); |
| 2044 | } |
| 2045 | if (scc > 0) { |
| 2046 | # if !defined(TN3270) |
| 2047 | telrcv(); |
| 2048 | returnValue = 1; |
| 2049 | # else /* !defined(TN3270) */ |
| 2050 | returnValue = Push3270(); |
| 2051 | # endif /* !defined(TN3270) */ |
| 2052 | } |
| 2053 | if (FD_ISSET(tout, &obits) && (TTYBYTES() > 0)) { |
| 2054 | FD_CLR(tout, &obits); |
| 2055 | returnValue = ttyflush(); |
| 2056 | } |
| 2057 | return returnValue; |
| 2058 | } |
| 2059 | \f |
| 2060 | /* |
| 2061 | * Select from tty and network... |
| 2062 | */ |
| 2063 | static void |
| 2064 | telnet() |
| 2065 | { |
| 2066 | int on = 1; |
| 2067 | #if defined(TN3270) && defined(unix) |
| 2068 | int myPid; |
| 2069 | #endif /* defined(TN3270) */ |
| 2070 | |
| 2071 | tout = fileno(stdout); |
| 2072 | tin = fileno(stdin); |
| 2073 | setconnmode(); |
| 2074 | scc = 0; |
| 2075 | tcc = 0; |
| 2076 | FD_ZERO(&ibits); |
| 2077 | FD_ZERO(&obits); |
| 2078 | FD_ZERO(&xbits); |
| 2079 | |
| 2080 | ioctl(net, FIONBIO, (char *)&on); |
| 2081 | |
| 2082 | #if defined(TN3270) |
| 2083 | #if !defined(DEBUG) /* DBX can't handle! */ |
| 2084 | ioctl(net, FIOASYNC, (char *)&on); /* hear about input */ |
| 2085 | #endif /* !defined(DEBUG) */ |
| 2086 | |
| 2087 | #if defined(unix) |
| 2088 | myPid = getpid(); |
| 2089 | #if defined(NOT43) |
| 2090 | myPid = -myPid; |
| 2091 | #endif /* defined(NOT43) */ |
| 2092 | ioctl(net, SIOCSPGRP, (char *)&myPid); /* set my pid */ |
| 2093 | #endif /* defined(unix) */ |
| 2094 | |
| 2095 | #endif /* defined(TN3270) */ |
| 2096 | |
| 2097 | #if defined(SO_OOBINLINE) |
| 2098 | setsockopt(net, SOL_SOCKET, SO_OOBINLINE, &on, sizeof on); |
| 2099 | #endif /* defined(SO_OOBINLINE) */ |
| 2100 | |
| 2101 | # if !defined(TN3270) |
| 2102 | if (telnetport) { |
| 2103 | if (!hisopts[TELOPT_SGA]) { |
| 2104 | willoption(TELOPT_SGA, 0); |
| 2105 | } |
| 2106 | if (!myopts[TELOPT_TTYPE]) { |
| 2107 | dooption(TELOPT_TTYPE, 0); |
| 2108 | } |
| 2109 | } |
| 2110 | # endif /* !defined(TN3270) */ |
| 2111 | |
| 2112 | # if !defined(TN3270) |
| 2113 | for (;;) { |
| 2114 | if (Scheduler(1) == -1) { |
| 2115 | setcommandmode(); |
| 2116 | return; |
| 2117 | } |
| 2118 | } |
| 2119 | # else /* !defined(TN3270) */ |
| 2120 | for (;;) { |
| 2121 | int schedValue; |
| 2122 | |
| 2123 | while (!In3270) { |
| 2124 | if (Scheduler(1) == -1) { |
| 2125 | setcommandmode(); |
| 2126 | return; |
| 2127 | } |
| 2128 | } |
| 2129 | |
| 2130 | while ((schedValue = Scheduler(0)) != 0) { |
| 2131 | if (schedValue == -1) { |
| 2132 | setcommandmode(); |
| 2133 | return; |
| 2134 | } |
| 2135 | } |
| 2136 | /* If there is data waiting to go out to terminal, don't |
| 2137 | * schedule any more data for the terminal. |
| 2138 | */ |
| 2139 | if (tfrontp-tbackp) { |
| 2140 | schedValue = 1; |
| 2141 | } else { |
| 2142 | schedValue = DoTerminalOutput(); |
| 2143 | } |
| 2144 | if (schedValue) { |
| 2145 | if (Scheduler(1) == -1) { |
| 2146 | setcommandmode(); |
| 2147 | return; |
| 2148 | } |
| 2149 | } |
| 2150 | } |
| 2151 | # endif /* !defined(TN3270) */ |
| 2152 | } |
| 2153 | \f |
| 2154 | /* |
| 2155 | * The following are data structures and routines for |
| 2156 | * the "send" command. |
| 2157 | * |
| 2158 | */ |
| 2159 | |
| 2160 | struct sendlist { |
| 2161 | char *name; /* How user refers to it (case independent) */ |
| 2162 | int what; /* Character to be sent (<0 ==> special) */ |
| 2163 | char *help; /* Help information (0 ==> no help) */ |
| 2164 | #if defined(NOT43) |
| 2165 | int (*routine)(); /* Routine to perform (for special ops) */ |
| 2166 | #else /* defined(NOT43) */ |
| 2167 | void (*routine)(); /* Routine to perform (for special ops) */ |
| 2168 | #endif /* defined(NOT43) */ |
| 2169 | }; |
| 2170 | \f |
| 2171 | #define SENDQUESTION -1 |
| 2172 | #define SENDESCAPE -3 |
| 2173 | |
| 2174 | static struct sendlist Sendlist[] = { |
| 2175 | { "ao", AO, "Send Telnet Abort output" }, |
| 2176 | { "ayt", AYT, "Send Telnet 'Are You There'" }, |
| 2177 | { "brk", BREAK, "Send Telnet Break" }, |
| 2178 | { "ec", EC, "Send Telnet Erase Character" }, |
| 2179 | { "el", EL, "Send Telnet Erase Line" }, |
| 2180 | { "escape", SENDESCAPE, "Send current escape character" }, |
| 2181 | { "ga", GA, "Send Telnet 'Go Ahead' sequence" }, |
| 2182 | { "ip", IP, "Send Telnet Interrupt Process" }, |
| 2183 | { "nop", NOP, "Send Telnet 'No operation'" }, |
| 2184 | { "synch", SYNCH, "Perform Telnet 'Synch operation'", dosynch }, |
| 2185 | { "?", SENDQUESTION, "Display send options" }, |
| 2186 | { 0 } |
| 2187 | }; |
| 2188 | |
| 2189 | static struct sendlist Sendlist2[] = { /* some synonyms */ |
| 2190 | { "break", BREAK, 0 }, |
| 2191 | |
| 2192 | { "intp", IP, 0 }, |
| 2193 | { "interrupt", IP, 0 }, |
| 2194 | { "intr", IP, 0 }, |
| 2195 | |
| 2196 | { "help", SENDQUESTION, 0 }, |
| 2197 | |
| 2198 | { 0 } |
| 2199 | }; |
| 2200 | |
| 2201 | static char ** |
| 2202 | getnextsend(name) |
| 2203 | char *name; |
| 2204 | { |
| 2205 | struct sendlist *c = (struct sendlist *) name; |
| 2206 | |
| 2207 | return (char **) (c+1); |
| 2208 | } |
| 2209 | |
| 2210 | static struct sendlist * |
| 2211 | getsend(name) |
| 2212 | char *name; |
| 2213 | { |
| 2214 | struct sendlist *sl; |
| 2215 | |
| 2216 | if ((sl = (struct sendlist *) |
| 2217 | genget(name, (char **) Sendlist, getnextsend)) != 0) { |
| 2218 | return sl; |
| 2219 | } else { |
| 2220 | return (struct sendlist *) |
| 2221 | genget(name, (char **) Sendlist2, getnextsend); |
| 2222 | } |
| 2223 | } |
| 2224 | |
| 2225 | static |
| 2226 | sendcmd(argc, argv) |
| 2227 | int argc; |
| 2228 | char **argv; |
| 2229 | { |
| 2230 | int what; /* what we are sending this time */ |
| 2231 | int count; /* how many bytes we are going to need to send */ |
| 2232 | int i; |
| 2233 | int question = 0; /* was at least one argument a question */ |
| 2234 | struct sendlist *s; /* pointer to current command */ |
| 2235 | |
| 2236 | if (argc < 2) { |
| 2237 | printf("need at least one argument for 'send' command\n"); |
| 2238 | printf("'send ?' for help\n"); |
| 2239 | return 0; |
| 2240 | } |
| 2241 | /* |
| 2242 | * First, validate all the send arguments. |
| 2243 | * In addition, we see how much space we are going to need, and |
| 2244 | * whether or not we will be doing a "SYNCH" operation (which |
| 2245 | * flushes the network queue). |
| 2246 | */ |
| 2247 | count = 0; |
| 2248 | for (i = 1; i < argc; i++) { |
| 2249 | s = getsend(argv[i]); |
| 2250 | if (s == 0) { |
| 2251 | printf("Unknown send argument '%s'\n'send ?' for help.\n", |
| 2252 | argv[i]); |
| 2253 | return 0; |
| 2254 | } else if (s == Ambiguous(struct sendlist *)) { |
| 2255 | printf("Ambiguous send argument '%s'\n'send ?' for help.\n", |
| 2256 | argv[i]); |
| 2257 | return 0; |
| 2258 | } |
| 2259 | switch (s->what) { |
| 2260 | case SENDQUESTION: |
| 2261 | break; |
| 2262 | case SENDESCAPE: |
| 2263 | count += 1; |
| 2264 | break; |
| 2265 | case SYNCH: |
| 2266 | count += 2; |
| 2267 | break; |
| 2268 | default: |
| 2269 | count += 2; |
| 2270 | break; |
| 2271 | } |
| 2272 | } |
| 2273 | /* Now, do we have enough room? */ |
| 2274 | if (NETROOM() < count) { |
| 2275 | printf("There is not enough room in the buffer TO the network\n"); |
| 2276 | printf("to process your request. Nothing will be done.\n"); |
| 2277 | printf("('send synch' will throw away most data in the network\n"); |
| 2278 | printf("buffer, if this might help.)\n"); |
| 2279 | return 0; |
| 2280 | } |
| 2281 | /* OK, they are all OK, now go through again and actually send */ |
| 2282 | for (i = 1; i < argc; i++) { |
| 2283 | if ((s = getsend(argv[i])) == 0) { |
| 2284 | fprintf(stderr, "Telnet 'send' error - argument disappeared!\n"); |
| 2285 | quit(); |
| 2286 | /*NOTREACHED*/ |
| 2287 | } |
| 2288 | if (s->routine) { |
| 2289 | (*s->routine)(s); |
| 2290 | } else { |
| 2291 | switch (what = s->what) { |
| 2292 | case SYNCH: |
| 2293 | dosynch(); |
| 2294 | break; |
| 2295 | case SENDQUESTION: |
| 2296 | for (s = Sendlist; s->name; s++) { |
| 2297 | if (s->help) { |
| 2298 | printf(s->name); |
| 2299 | if (s->help) { |
| 2300 | printf("\t%s", s->help); |
| 2301 | } |
| 2302 | printf("\n"); |
| 2303 | } |
| 2304 | } |
| 2305 | question = 1; |
| 2306 | break; |
| 2307 | case SENDESCAPE: |
| 2308 | NETADD(escape); |
| 2309 | break; |
| 2310 | default: |
| 2311 | NET2ADD(IAC, what); |
| 2312 | break; |
| 2313 | } |
| 2314 | } |
| 2315 | } |
| 2316 | return !question; |
| 2317 | } |
| 2318 | \f |
| 2319 | /* |
| 2320 | * The following are the routines and data structures referred |
| 2321 | * to by the arguments to the "toggle" command. |
| 2322 | */ |
| 2323 | |
| 2324 | static |
| 2325 | lclchars() |
| 2326 | { |
| 2327 | donelclchars = 1; |
| 2328 | return 1; |
| 2329 | } |
| 2330 | |
| 2331 | static |
| 2332 | togdebug() |
| 2333 | { |
| 2334 | #ifndef NOT43 |
| 2335 | if (net > 0 && |
| 2336 | setsockopt(net, SOL_SOCKET, SO_DEBUG, (char *)&debug, sizeof(debug)) |
| 2337 | < 0) { |
| 2338 | perror("setsockopt (SO_DEBUG)"); |
| 2339 | } |
| 2340 | #else /* NOT43 */ |
| 2341 | if (debug) { |
| 2342 | if (net > 0 && setsockopt(net, SOL_SOCKET, SO_DEBUG, 0, 0) < 0) |
| 2343 | perror("setsockopt (SO_DEBUG)"); |
| 2344 | } else |
| 2345 | printf("Cannot turn off socket debugging\n"); |
| 2346 | #endif /* NOT43 */ |
| 2347 | return 1; |
| 2348 | } |
| 2349 | |
| 2350 | |
| 2351 | |
| 2352 | extern int togglehelp(); |
| 2353 | |
| 2354 | struct togglelist { |
| 2355 | char *name; /* name of toggle */ |
| 2356 | char *help; /* help message */ |
| 2357 | int (*handler)(); /* routine to do actual setting */ |
| 2358 | int dohelp; /* should we display help information */ |
| 2359 | int *variable; |
| 2360 | char *actionexplanation; |
| 2361 | }; |
| 2362 | |
| 2363 | static struct togglelist Togglelist[] = { |
| 2364 | { "autoflush", |
| 2365 | "toggle flushing of output when sending interrupt characters", |
| 2366 | 0, |
| 2367 | 1, |
| 2368 | &autoflush, |
| 2369 | "flush output when sending interrupt characters" }, |
| 2370 | { "autosynch", |
| 2371 | "toggle automatic sending of interrupt characters in urgent mode", |
| 2372 | 0, |
| 2373 | 1, |
| 2374 | &autosynch, |
| 2375 | "send interrupt characters in urgent mode" }, |
| 2376 | { "crmod", |
| 2377 | "toggle mapping of received carriage returns", |
| 2378 | 0, |
| 2379 | 1, |
| 2380 | &crmod, |
| 2381 | "map carriage return on output" }, |
| 2382 | { "localchars", |
| 2383 | "toggle local recognition of certain control characters", |
| 2384 | lclchars, |
| 2385 | 1, |
| 2386 | &localchars, |
| 2387 | "recognize certain control characters" }, |
| 2388 | { " ", "", 0, 1 }, /* empty line */ |
| 2389 | { "debug", |
| 2390 | "(debugging) toggle debugging", |
| 2391 | togdebug, |
| 2392 | 1, |
| 2393 | &debug, |
| 2394 | "turn on socket level debugging" }, |
| 2395 | { "netdata", |
| 2396 | "(debugging) toggle printing of hexadecimal network data", |
| 2397 | 0, |
| 2398 | 1, |
| 2399 | &netdata, |
| 2400 | "print hexadecimal representation of network traffic" }, |
| 2401 | { "options", |
| 2402 | "(debugging) toggle viewing of options processing", |
| 2403 | 0, |
| 2404 | 1, |
| 2405 | &showoptions, |
| 2406 | "show option processing" }, |
| 2407 | { " ", "", 0, 1 }, /* empty line */ |
| 2408 | { "?", |
| 2409 | "display help information", |
| 2410 | togglehelp, |
| 2411 | 1 }, |
| 2412 | { "help", |
| 2413 | "display help information", |
| 2414 | togglehelp, |
| 2415 | 0 }, |
| 2416 | { 0 } |
| 2417 | }; |
| 2418 | |
| 2419 | static |
| 2420 | togglehelp() |
| 2421 | { |
| 2422 | struct togglelist *c; |
| 2423 | |
| 2424 | for (c = Togglelist; c->name; c++) { |
| 2425 | if (c->dohelp) { |
| 2426 | printf("%s\t%s\n", c->name, c->help); |
| 2427 | } |
| 2428 | } |
| 2429 | return 0; |
| 2430 | } |
| 2431 | |
| 2432 | static char ** |
| 2433 | getnexttoggle(name) |
| 2434 | char *name; |
| 2435 | { |
| 2436 | struct togglelist *c = (struct togglelist *) name; |
| 2437 | |
| 2438 | return (char **) (c+1); |
| 2439 | } |
| 2440 | |
| 2441 | static struct togglelist * |
| 2442 | gettoggle(name) |
| 2443 | char *name; |
| 2444 | { |
| 2445 | return (struct togglelist *) |
| 2446 | genget(name, (char **) Togglelist, getnexttoggle); |
| 2447 | } |
| 2448 | |
| 2449 | static |
| 2450 | toggle(argc, argv) |
| 2451 | int argc; |
| 2452 | char *argv[]; |
| 2453 | { |
| 2454 | int retval = 1; |
| 2455 | char *name; |
| 2456 | struct togglelist *c; |
| 2457 | |
| 2458 | if (argc < 2) { |
| 2459 | fprintf(stderr, |
| 2460 | "Need an argument to 'toggle' command. 'toggle ?' for help.\n"); |
| 2461 | return 0; |
| 2462 | } |
| 2463 | argc--; |
| 2464 | argv++; |
| 2465 | while (argc--) { |
| 2466 | name = *argv++; |
| 2467 | c = gettoggle(name); |
| 2468 | if (c == Ambiguous(struct togglelist *)) { |
| 2469 | fprintf(stderr, "'%s': ambiguous argument ('toggle ?' for help).\n", |
| 2470 | name); |
| 2471 | return 0; |
| 2472 | } else if (c == 0) { |
| 2473 | fprintf(stderr, "'%s': unknown argument ('toggle ?' for help).\n", |
| 2474 | name); |
| 2475 | return 0; |
| 2476 | } else { |
| 2477 | if (c->variable) { |
| 2478 | *c->variable = !*c->variable; /* invert it */ |
| 2479 | printf("%s %s.\n", *c->variable? "Will" : "Won't", |
| 2480 | c->actionexplanation); |
| 2481 | } |
| 2482 | if (c->handler) { |
| 2483 | retval &= (*c->handler)(c); |
| 2484 | } |
| 2485 | } |
| 2486 | } |
| 2487 | return retval; |
| 2488 | } |
| 2489 | \f |
| 2490 | /* |
| 2491 | * The following perform the "set" command. |
| 2492 | */ |
| 2493 | |
| 2494 | struct setlist { |
| 2495 | char *name; /* name */ |
| 2496 | char *help; /* help information */ |
| 2497 | char *charp; /* where it is located at */ |
| 2498 | }; |
| 2499 | |
| 2500 | static struct setlist Setlist[] = { |
| 2501 | { "echo", "character to toggle local echoing on/off", &echoc }, |
| 2502 | { "escape", "character to escape back to telnet command mode", &escape }, |
| 2503 | { " ", "" }, |
| 2504 | { " ", "The following need 'localchars' to be toggled true", 0 }, |
| 2505 | { "erase", "character to cause an Erase Character", &nttyb.sg_erase }, |
| 2506 | { "flushoutput", "character to cause an Abort Oubput", &nltc.t_flushc }, |
| 2507 | { "interrupt", "character to cause an Interrupt Process", &ntc.t_intrc }, |
| 2508 | { "kill", "character to cause an Erase Line", &nttyb.sg_kill }, |
| 2509 | { "quit", "character to cause a Break", &ntc.t_quitc }, |
| 2510 | { "eof", "character to cause an EOF ", &ntc.t_eofc }, |
| 2511 | { 0 } |
| 2512 | }; |
| 2513 | |
| 2514 | static char ** |
| 2515 | getnextset(name) |
| 2516 | char *name; |
| 2517 | { |
| 2518 | struct setlist *c = (struct setlist *)name; |
| 2519 | |
| 2520 | return (char **) (c+1); |
| 2521 | } |
| 2522 | |
| 2523 | static struct setlist * |
| 2524 | getset(name) |
| 2525 | char *name; |
| 2526 | { |
| 2527 | return (struct setlist *) genget(name, (char **) Setlist, getnextset); |
| 2528 | } |
| 2529 | |
| 2530 | static |
| 2531 | setcmd(argc, argv) |
| 2532 | int argc; |
| 2533 | char *argv[]; |
| 2534 | { |
| 2535 | int value; |
| 2536 | struct setlist *ct; |
| 2537 | |
| 2538 | /* XXX back we go... sigh */ |
| 2539 | if (argc != 3) { |
| 2540 | if ((argc == 2) && |
| 2541 | ((!strcmp(argv[1], "?")) || (!strcmp(argv[1], "help")))) { |
| 2542 | for (ct = Setlist; ct->name; ct++) { |
| 2543 | printf("%s\t%s\n", ct->name, ct->help); |
| 2544 | } |
| 2545 | printf("?\tdisplay help information\n"); |
| 2546 | } else { |
| 2547 | printf("Format is 'set Name Value'\n'set ?' for help.\n"); |
| 2548 | } |
| 2549 | return 0; |
| 2550 | } |
| 2551 | |
| 2552 | ct = getset(argv[1]); |
| 2553 | if (ct == 0) { |
| 2554 | fprintf(stderr, "'%s': unknown argument ('set ?' for help).\n", |
| 2555 | argv[1]); |
| 2556 | return 0; |
| 2557 | } else if (ct == Ambiguous(struct setlist *)) { |
| 2558 | fprintf(stderr, "'%s': ambiguous argument ('set ?' for help).\n", |
| 2559 | argv[1]); |
| 2560 | return 0; |
| 2561 | } else { |
| 2562 | if (strcmp("off", argv[2])) { |
| 2563 | value = special(argv[2]); |
| 2564 | } else { |
| 2565 | value = -1; |
| 2566 | } |
| 2567 | *(ct->charp) = value; |
| 2568 | printf("%s character is '%s'.\n", ct->name, control(*(ct->charp))); |
| 2569 | } |
| 2570 | return 1; |
| 2571 | } |
| 2572 | \f |
| 2573 | /* |
| 2574 | * The following are the data structures and routines for the |
| 2575 | * 'mode' command. |
| 2576 | */ |
| 2577 | |
| 2578 | static |
| 2579 | dolinemode() |
| 2580 | { |
| 2581 | if (hisopts[TELOPT_SGA]) { |
| 2582 | wontoption(TELOPT_SGA, 0); |
| 2583 | } |
| 2584 | if (hisopts[TELOPT_ECHO]) { |
| 2585 | wontoption(TELOPT_ECHO, 0); |
| 2586 | } |
| 2587 | return 1; |
| 2588 | } |
| 2589 | |
| 2590 | static |
| 2591 | docharmode() |
| 2592 | { |
| 2593 | if (!hisopts[TELOPT_SGA]) { |
| 2594 | willoption(TELOPT_SGA, 0); |
| 2595 | } |
| 2596 | if (!hisopts[TELOPT_ECHO]) { |
| 2597 | willoption(TELOPT_ECHO, 0); |
| 2598 | } |
| 2599 | return 1; |
| 2600 | } |
| 2601 | |
| 2602 | static struct cmd Modelist[] = { |
| 2603 | { "character", "character-at-a-time mode", docharmode, 1, 1 }, |
| 2604 | { "line", "line-by-line mode", dolinemode, 1, 1 }, |
| 2605 | { 0 }, |
| 2606 | }; |
| 2607 | |
| 2608 | static char ** |
| 2609 | getnextmode(name) |
| 2610 | char *name; |
| 2611 | { |
| 2612 | struct cmd *c = (struct cmd *) name; |
| 2613 | |
| 2614 | return (char **) (c+1); |
| 2615 | } |
| 2616 | |
| 2617 | static struct cmd * |
| 2618 | getmodecmd(name) |
| 2619 | char *name; |
| 2620 | { |
| 2621 | return (struct cmd *) genget(name, (char **) Modelist, getnextmode); |
| 2622 | } |
| 2623 | |
| 2624 | static |
| 2625 | modecmd(argc, argv) |
| 2626 | int argc; |
| 2627 | char *argv[]; |
| 2628 | { |
| 2629 | struct cmd *mt; |
| 2630 | |
| 2631 | if ((argc != 2) || !strcmp(argv[1], "?") || !strcmp(argv[1], "help")) { |
| 2632 | printf("format is: 'mode Mode', where 'Mode' is one of:\n\n"); |
| 2633 | for (mt = Modelist; mt->name; mt++) { |
| 2634 | printf("%s\t%s\n", mt->name, mt->help); |
| 2635 | } |
| 2636 | return 0; |
| 2637 | } |
| 2638 | mt = getmodecmd(argv[1]); |
| 2639 | if (mt == 0) { |
| 2640 | fprintf(stderr, "Unknown mode '%s' ('mode ?' for help).\n", argv[1]); |
| 2641 | return 0; |
| 2642 | } else if (mt == Ambiguous(struct cmd *)) { |
| 2643 | fprintf(stderr, "Ambiguous mode '%s' ('mode ?' for help).\n", argv[1]); |
| 2644 | return 0; |
| 2645 | } else { |
| 2646 | (*mt->handler)(); |
| 2647 | } |
| 2648 | return 1; |
| 2649 | } |
| 2650 | \f |
| 2651 | /* |
| 2652 | * The following data structures and routines implement the |
| 2653 | * "display" command. |
| 2654 | */ |
| 2655 | |
| 2656 | static |
| 2657 | display(argc, argv) |
| 2658 | int argc; |
| 2659 | char *argv[]; |
| 2660 | { |
| 2661 | #define dotog(tl) if (tl->variable && tl->actionexplanation) { \ |
| 2662 | if (*tl->variable) { \ |
| 2663 | printf("will"); \ |
| 2664 | } else { \ |
| 2665 | printf("won't"); \ |
| 2666 | } \ |
| 2667 | printf(" %s.\n", tl->actionexplanation); \ |
| 2668 | } |
| 2669 | |
| 2670 | #define doset(sl) if (sl->name && *sl->name != ' ') { \ |
| 2671 | printf("[%s]\t%s.\n", control(*sl->charp), sl->name); \ |
| 2672 | } |
| 2673 | |
| 2674 | struct togglelist *tl; |
| 2675 | struct setlist *sl; |
| 2676 | |
| 2677 | if (argc == 1) { |
| 2678 | for (tl = Togglelist; tl->name; tl++) { |
| 2679 | dotog(tl); |
| 2680 | } |
| 2681 | printf("\n"); |
| 2682 | for (sl = Setlist; sl->name; sl++) { |
| 2683 | doset(sl); |
| 2684 | } |
| 2685 | } else { |
| 2686 | int i; |
| 2687 | |
| 2688 | for (i = 1; i < argc; i++) { |
| 2689 | sl = getset(argv[i]); |
| 2690 | tl = gettoggle(argv[i]); |
| 2691 | if ((sl == Ambiguous(struct setlist *)) || |
| 2692 | (tl == Ambiguous(struct togglelist *))) { |
| 2693 | printf("?Ambiguous argument '%s'.\n", argv[i]); |
| 2694 | return 0; |
| 2695 | } else if (!sl && !tl) { |
| 2696 | printf("?Unknown argument '%s'.\n", argv[i]); |
| 2697 | return 0; |
| 2698 | } else { |
| 2699 | if (tl) { |
| 2700 | dotog(tl); |
| 2701 | } |
| 2702 | if (sl) { |
| 2703 | doset(sl); |
| 2704 | } |
| 2705 | } |
| 2706 | } |
| 2707 | } |
| 2708 | return 1; |
| 2709 | #undef doset |
| 2710 | #undef dotog |
| 2711 | } |
| 2712 | \f |
| 2713 | /* |
| 2714 | * The following are the data structures, and many of the routines, |
| 2715 | * relating to command processing. |
| 2716 | */ |
| 2717 | |
| 2718 | /* |
| 2719 | * Set the escape character. |
| 2720 | */ |
| 2721 | static |
| 2722 | setescape(argc, argv) |
| 2723 | int argc; |
| 2724 | char *argv[]; |
| 2725 | { |
| 2726 | register char *arg; |
| 2727 | char buf[50]; |
| 2728 | |
| 2729 | printf( |
| 2730 | "Deprecated usage - please use 'set escape%s%s' in the future.\n", |
| 2731 | (argc > 2)? " ":"", (argc > 2)? argv[1]: ""); |
| 2732 | if (argc > 2) |
| 2733 | arg = argv[1]; |
| 2734 | else { |
| 2735 | printf("new escape character: "); |
| 2736 | gets(buf); |
| 2737 | arg = buf; |
| 2738 | } |
| 2739 | if (arg[0] != '\0') |
| 2740 | escape = arg[0]; |
| 2741 | if (!In3270) { |
| 2742 | printf("Escape character is '%s'.\n", control(escape)); |
| 2743 | } |
| 2744 | fflush(stdout); |
| 2745 | return 1; |
| 2746 | } |
| 2747 | |
| 2748 | /*VARARGS*/ |
| 2749 | static |
| 2750 | togcrmod() |
| 2751 | { |
| 2752 | crmod = !crmod; |
| 2753 | printf("Deprecated usage - please use 'toggle crmod' in the future.\n"); |
| 2754 | printf("%s map carriage return on output.\n", crmod ? "Will" : "Won't"); |
| 2755 | fflush(stdout); |
| 2756 | return 1; |
| 2757 | } |
| 2758 | |
| 2759 | /*VARARGS*/ |
| 2760 | suspend() |
| 2761 | { |
| 2762 | setcommandmode(); |
| 2763 | #if defined(unix) |
| 2764 | kill(0, SIGTSTP); |
| 2765 | #endif /* defined(unix) */ |
| 2766 | /* reget parameters in case they were changed */ |
| 2767 | ioctl(0, TIOCGETP, (char *)&ottyb); |
| 2768 | ioctl(0, TIOCGETC, (char *)&otc); |
| 2769 | ioctl(0, TIOCGLTC, (char *)&oltc); |
| 2770 | return 1; |
| 2771 | } |
| 2772 | |
| 2773 | /*VARARGS*/ |
| 2774 | static |
| 2775 | bye() |
| 2776 | { |
| 2777 | if (connected) { |
| 2778 | shutdown(net, 2); |
| 2779 | printf("Connection closed.\n"); |
| 2780 | close(net); |
| 2781 | connected = 0; |
| 2782 | /* reset options */ |
| 2783 | bzero((char *)hisopts, sizeof hisopts); |
| 2784 | bzero((char *)myopts, sizeof myopts); |
| 2785 | SYNCHing = flushout = 0; |
| 2786 | flushline = 1; |
| 2787 | #if defined(TN3270) |
| 2788 | /* |
| 2789 | * The problem is that we were called from command() which |
| 2790 | * was called from DataFrom3270() which was called from |
| 2791 | * DataFromTerminal() which was called from... |
| 2792 | * |
| 2793 | * So, just quit. |
| 2794 | */ |
| 2795 | if (In3270) { |
| 2796 | Exit(0); |
| 2797 | } |
| 2798 | #endif /* defined(TN3270) */ |
| 2799 | } |
| 2800 | return 1; |
| 2801 | } |
| 2802 | |
| 2803 | /*VARARGS*/ |
| 2804 | quit() |
| 2805 | { |
| 2806 | (void) call(bye, "bye", 0); |
| 2807 | Exit(0); |
| 2808 | /*NOTREACHED*/ |
| 2809 | return 1; /* just to keep lint happy */ |
| 2810 | } |
| 2811 | |
| 2812 | /* |
| 2813 | * Print status about the connection. |
| 2814 | */ |
| 2815 | static |
| 2816 | status(argc, argv) |
| 2817 | int argc; |
| 2818 | char *argv[]; |
| 2819 | { |
| 2820 | if (connected) { |
| 2821 | printf("Connected to %s.\n", hostname); |
| 2822 | if (argc < 2) { |
| 2823 | printf("Operating in %s.\n", |
| 2824 | modelist[getconnmode()].modedescriptions); |
| 2825 | if (localchars) { |
| 2826 | printf("Catching signals locally.\n"); |
| 2827 | } |
| 2828 | } |
| 2829 | } else { |
| 2830 | printf("No connection.\n"); |
| 2831 | } |
| 2832 | # if !defined(TN3270) |
| 2833 | printf("Escape character is '%s'.\n", control(escape)); |
| 2834 | fflush(stdout); |
| 2835 | # else /* !defined(TN3270) */ |
| 2836 | if ((!In3270) && ((argc < 2) || strcmp(argv[1], "notmuch"))) { |
| 2837 | printf("Escape character is '%s'.\n", control(escape)); |
| 2838 | } |
| 2839 | # if defined(unix) |
| 2840 | if (In3270 && transcom) { |
| 2841 | printf("Transparent mode command is '%s'.\n", transcom); |
| 2842 | } |
| 2843 | # endif /* defined(unix) */ |
| 2844 | fflush(stdout); |
| 2845 | if (In3270) { |
| 2846 | return 0; |
| 2847 | } |
| 2848 | # endif /* defined(TN3270) */ |
| 2849 | return 1; |
| 2850 | } |
| 2851 | |
| 2852 | #if defined(TN3270) && defined(unix) |
| 2853 | static |
| 2854 | settranscom(argc, argv) |
| 2855 | int argc; |
| 2856 | char *argv[]; |
| 2857 | { |
| 2858 | int i, len = 0; |
| 2859 | char *strcpy(), *strcat(); |
| 2860 | |
| 2861 | if (argc == 1 && transcom) { |
| 2862 | transcom = 0; |
| 2863 | } |
| 2864 | if (argc == 1) { |
| 2865 | return; |
| 2866 | } |
| 2867 | for (i = 1; i < argc; ++i) { |
| 2868 | len += 1 + strlen(argv[1]); |
| 2869 | } |
| 2870 | transcom = tline; |
| 2871 | (void) strcpy(transcom, argv[1]); |
| 2872 | for (i = 2; i < argc; ++i) { |
| 2873 | (void) strcat(transcom, " "); |
| 2874 | (void) strcat(transcom, argv[i]); |
| 2875 | } |
| 2876 | } |
| 2877 | #endif /* defined(TN3270) && defined(unix) */ |
| 2878 | |
| 2879 | |
| 2880 | static |
| 2881 | tn(argc, argv) |
| 2882 | int argc; |
| 2883 | char *argv[]; |
| 2884 | { |
| 2885 | register struct hostent *host = 0; |
| 2886 | #if defined(msdos) |
| 2887 | char *cp; |
| 2888 | #endif /* defined(msdos) */ |
| 2889 | |
| 2890 | if (connected) { |
| 2891 | printf("?Already connected to %s\n", hostname); |
| 2892 | return 0; |
| 2893 | } |
| 2894 | if (argc < 2) { |
| 2895 | (void) strcpy(line, "Connect "); |
| 2896 | printf("(to) "); |
| 2897 | gets(&line[strlen(line)]); |
| 2898 | makeargv(); |
| 2899 | argc = margc; |
| 2900 | argv = margv; |
| 2901 | } |
| 2902 | if (argc > 3) { |
| 2903 | printf("usage: %s host-name [port]\n", argv[0]); |
| 2904 | return 0; |
| 2905 | } |
| 2906 | #if defined(msdos) |
| 2907 | for (cp = argv[1]; *cp; cp++) { |
| 2908 | if (isupper(*cp)) { |
| 2909 | *cp = tolower(*cp); |
| 2910 | } |
| 2911 | } |
| 2912 | #endif /* defined(msdos) */ |
| 2913 | sin.sin_addr.s_addr = inet_addr(argv[1]); |
| 2914 | if (sin.sin_addr.s_addr != -1) { |
| 2915 | sin.sin_family = AF_INET; |
| 2916 | (void) strcpy(hnamebuf, argv[1]); |
| 2917 | hostname = hnamebuf; |
| 2918 | } else { |
| 2919 | host = gethostbyname(argv[1]); |
| 2920 | if (host) { |
| 2921 | sin.sin_family = host->h_addrtype; |
| 2922 | #if defined(h_addr) /* In 4.3, this is a #define */ |
| 2923 | bcopy(host->h_addr_list[0], (caddr_t)&sin.sin_addr, host->h_length); |
| 2924 | #else /* defined(h_addr) */ |
| 2925 | bcopy(host->h_addr, (caddr_t)&sin.sin_addr, host->h_length); |
| 2926 | #endif /* defined(h_addr) */ |
| 2927 | hostname = host->h_name; |
| 2928 | } else { |
| 2929 | printf("%s: unknown host\n", argv[1]); |
| 2930 | return 0; |
| 2931 | } |
| 2932 | } |
| 2933 | sin.sin_port = sp->s_port; |
| 2934 | if (argc == 3) { |
| 2935 | sin.sin_port = atoi(argv[2]); |
| 2936 | if (sin.sin_port == 0) { |
| 2937 | sp = getservbyname(argv[2], "tcp"); |
| 2938 | if (sp) |
| 2939 | sin.sin_port = sp->s_port; |
| 2940 | else { |
| 2941 | printf("%s: bad port number\n", argv[2]); |
| 2942 | return 0; |
| 2943 | } |
| 2944 | } else { |
| 2945 | sin.sin_port = atoi(argv[2]); |
| 2946 | sin.sin_port = htons(sin.sin_port); |
| 2947 | } |
| 2948 | telnetport = 0; |
| 2949 | } else { |
| 2950 | telnetport = 1; |
| 2951 | } |
| 2952 | #if defined(unix) |
| 2953 | signal(SIGINT, intr); |
| 2954 | signal(SIGQUIT, intr2); |
| 2955 | signal(SIGPIPE, deadpeer); |
| 2956 | #endif /* defined(unix) */ |
| 2957 | printf("Trying...\n"); |
| 2958 | do { |
| 2959 | net = socket(AF_INET, SOCK_STREAM, 0); |
| 2960 | if (net < 0) { |
| 2961 | perror("telnet: socket"); |
| 2962 | return 0; |
| 2963 | } |
| 2964 | #ifndef NOT43 |
| 2965 | if (debug && setsockopt(net, SOL_SOCKET, SO_DEBUG, |
| 2966 | (char *)&debug, sizeof(debug)) < 0) |
| 2967 | #else /* NOT43 */ |
| 2968 | if (debug && setsockopt(net, SOL_SOCKET, SO_DEBUG, 0, 0) < 0) |
| 2969 | #endif /* NOT43 */ |
| 2970 | perror("setsockopt (SO_DEBUG)"); |
| 2971 | |
| 2972 | if (connect(net, (struct sockaddr *)&sin, sizeof (sin)) < 0) { |
| 2973 | #if defined(h_addr) /* In 4.3, this is a #define */ |
| 2974 | if (host && host->h_addr_list[1]) { |
| 2975 | int oerrno = errno; |
| 2976 | |
| 2977 | fprintf(stderr, "telnet: connect to address %s: ", |
| 2978 | inet_ntoa(sin.sin_addr)); |
| 2979 | errno = oerrno; |
| 2980 | perror((char *)0); |
| 2981 | host->h_addr_list++; |
| 2982 | bcopy(host->h_addr_list[0], |
| 2983 | (caddr_t)&sin.sin_addr, host->h_length); |
| 2984 | fprintf(stderr, "Trying %s...\n", |
| 2985 | inet_ntoa(sin.sin_addr)); |
| 2986 | (void) close(net); |
| 2987 | continue; |
| 2988 | } |
| 2989 | #endif /* defined(h_addr) */ |
| 2990 | perror("telnet: Unable to connect to remote host"); |
| 2991 | #if defined(unix) |
| 2992 | signal(SIGINT, SIG_DFL); |
| 2993 | signal(SIGQUIT, SIG_DFL); |
| 2994 | #endif /* defined(unix) */ |
| 2995 | return 0; |
| 2996 | } |
| 2997 | connected++; |
| 2998 | } while (connected == 0); |
| 2999 | call(status, "status", "notmuch", 0); |
| 3000 | if (setjmp(peerdied) == 0) |
| 3001 | telnet(); |
| 3002 | ExitString(stderr, "Connection closed by foreign host.\n",1); |
| 3003 | /*NOTREACHED*/ |
| 3004 | } |
| 3005 | |
| 3006 | |
| 3007 | #define HELPINDENT (sizeof ("connect")) |
| 3008 | |
| 3009 | static char |
| 3010 | openhelp[] = "connect to a site", |
| 3011 | closehelp[] = "close current connection", |
| 3012 | quithelp[] = "exit telnet", |
| 3013 | zhelp[] = "suspend telnet", |
| 3014 | statushelp[] = "print status information", |
| 3015 | helphelp[] = "print help information", |
| 3016 | sendhelp[] = "transmit special characters ('send ?' for more)", |
| 3017 | sethelp[] = "set operating parameters ('set ?' for more)", |
| 3018 | togglestring[] ="toggle operating parameters ('toggle ?' for more)", |
| 3019 | displayhelp[] = "display operating parameters", |
| 3020 | #if defined(TN3270) && defined(unix) |
| 3021 | transcomhelp[] = "specify Unix command for transparent mode pipe", |
| 3022 | #endif /* defined(TN3270) && defined(unix) */ |
| 3023 | modehelp[] = "try to enter line-by-line or character-at-a-time mode"; |
| 3024 | |
| 3025 | extern int help(); |
| 3026 | |
| 3027 | static struct cmd cmdtab[] = { |
| 3028 | { "close", closehelp, bye, 1, 1 }, |
| 3029 | { "display", displayhelp, display, 1, 0 }, |
| 3030 | { "mode", modehelp, modecmd, 1, 1 }, |
| 3031 | { "open", openhelp, tn, 1, 0 }, |
| 3032 | { "quit", quithelp, quit, 1, 0 }, |
| 3033 | { "send", sendhelp, sendcmd, 1, 1 }, |
| 3034 | { "set", sethelp, setcmd, 1, 0 }, |
| 3035 | { "status", statushelp, status, 1, 0 }, |
| 3036 | { "toggle", togglestring, toggle, 1, 0 }, |
| 3037 | #if defined(TN3270) && defined(unix) |
| 3038 | { "transcom", transcomhelp, settranscom, 1, 0 }, |
| 3039 | #endif /* defined(TN3270) && defined(unix) */ |
| 3040 | { "z", zhelp, suspend, 1, 0 }, |
| 3041 | { "?", helphelp, help, 1, 0 }, |
| 3042 | 0 |
| 3043 | }; |
| 3044 | |
| 3045 | static char crmodhelp[] = "deprecated command -- use 'toggle crmod' instead"; |
| 3046 | static char escapehelp[] = "deprecated command -- use 'set escape' instead"; |
| 3047 | |
| 3048 | static struct cmd cmdtab2[] = { |
| 3049 | { "help", helphelp, help, 0, 0 }, |
| 3050 | { "escape", escapehelp, setescape, 1, 0 }, |
| 3051 | { "crmod", crmodhelp, togcrmod, 1, 0 }, |
| 3052 | 0 |
| 3053 | }; |
| 3054 | |
| 3055 | /* |
| 3056 | * Call routine with argc, argv set from args (terminated by 0). |
| 3057 | * VARARGS2 |
| 3058 | */ |
| 3059 | static |
| 3060 | call(routine, args) |
| 3061 | int (*routine)(); |
| 3062 | char *args; |
| 3063 | { |
| 3064 | register char **argp; |
| 3065 | register int argc; |
| 3066 | |
| 3067 | for (argc = 0, argp = &args; *argp++ != 0; argc++) |
| 3068 | ; |
| 3069 | return (*routine)(argc, &args); |
| 3070 | } |
| 3071 | |
| 3072 | static char ** |
| 3073 | getnextcmd(name) |
| 3074 | char *name; |
| 3075 | { |
| 3076 | struct cmd *c = (struct cmd *) name; |
| 3077 | |
| 3078 | return (char **) (c+1); |
| 3079 | } |
| 3080 | |
| 3081 | static struct cmd * |
| 3082 | getcmd(name) |
| 3083 | char *name; |
| 3084 | { |
| 3085 | struct cmd *cm; |
| 3086 | |
| 3087 | if ((cm = (struct cmd *) genget(name, (char **) cmdtab, getnextcmd)) != 0) { |
| 3088 | return cm; |
| 3089 | } else { |
| 3090 | return (struct cmd *) genget(name, (char **) cmdtab2, getnextcmd); |
| 3091 | } |
| 3092 | } |
| 3093 | |
| 3094 | void |
| 3095 | command(top) |
| 3096 | int top; |
| 3097 | { |
| 3098 | register struct cmd *c; |
| 3099 | |
| 3100 | setcommandmode(); |
| 3101 | if (!top) { |
| 3102 | putchar('\n'); |
| 3103 | } else { |
| 3104 | #if defined(unix) |
| 3105 | signal(SIGINT, SIG_DFL); |
| 3106 | signal(SIGQUIT, SIG_DFL); |
| 3107 | #endif /* defined(unix) */ |
| 3108 | } |
| 3109 | for (;;) { |
| 3110 | printf("%s> ", prompt); |
| 3111 | if (gets(line) == NULL) { |
| 3112 | if (feof(stdin) || ferror(stdin)) |
| 3113 | quit(); |
| 3114 | break; |
| 3115 | } |
| 3116 | if (line[0] == 0) |
| 3117 | break; |
| 3118 | makeargv(); |
| 3119 | c = getcmd(margv[0]); |
| 3120 | if (c == Ambiguous(struct cmd *)) { |
| 3121 | printf("?Ambiguous command\n"); |
| 3122 | continue; |
| 3123 | } |
| 3124 | if (c == 0) { |
| 3125 | printf("?Invalid command\n"); |
| 3126 | continue; |
| 3127 | } |
| 3128 | if (c->needconnect && !connected) { |
| 3129 | printf("?Need to be connected first.\n"); |
| 3130 | continue; |
| 3131 | } |
| 3132 | if ((*c->handler)(margc, margv)) { |
| 3133 | break; |
| 3134 | } |
| 3135 | } |
| 3136 | if (!top) { |
| 3137 | if (!connected) { |
| 3138 | longjmp(toplevel, 1); |
| 3139 | /*NOTREACHED*/ |
| 3140 | } |
| 3141 | setconnmode(); |
| 3142 | } |
| 3143 | } |
| 3144 | \f |
| 3145 | /* |
| 3146 | * Help command. |
| 3147 | */ |
| 3148 | static |
| 3149 | help(argc, argv) |
| 3150 | int argc; |
| 3151 | char *argv[]; |
| 3152 | { |
| 3153 | register struct cmd *c; |
| 3154 | |
| 3155 | if (argc == 1) { |
| 3156 | printf("Commands may be abbreviated. Commands are:\n\n"); |
| 3157 | for (c = cmdtab; c->name; c++) |
| 3158 | if (c->dohelp) { |
| 3159 | printf("%-*s\t%s\n", HELPINDENT, c->name, |
| 3160 | c->help); |
| 3161 | } |
| 3162 | return 0; |
| 3163 | } |
| 3164 | while (--argc > 0) { |
| 3165 | register char *arg; |
| 3166 | arg = *++argv; |
| 3167 | c = getcmd(arg); |
| 3168 | if (c == Ambiguous(struct cmd *)) |
| 3169 | printf("?Ambiguous help command %s\n", arg); |
| 3170 | else if (c == (struct cmd *)0) |
| 3171 | printf("?Invalid help command %s\n", arg); |
| 3172 | else |
| 3173 | printf("%s\n", c->help); |
| 3174 | } |
| 3175 | return 0; |
| 3176 | } |
| 3177 | \f |
| 3178 | /* |
| 3179 | * main. Parse arguments, invoke the protocol or command parser. |
| 3180 | */ |
| 3181 | |
| 3182 | |
| 3183 | void |
| 3184 | main(argc, argv) |
| 3185 | int argc; |
| 3186 | char *argv[]; |
| 3187 | { |
| 3188 | sp = getservbyname("telnet", "tcp"); |
| 3189 | if (sp == 0) { |
| 3190 | ExitString(stderr, "telnet: tcp/telnet: unknown service\n",1); |
| 3191 | /*NOTREACHED*/ |
| 3192 | } |
| 3193 | NetTrace = stdout; |
| 3194 | ioctl(0, TIOCGETP, (char *)&ottyb); |
| 3195 | ioctl(0, TIOCGETC, (char *)&otc); |
| 3196 | ioctl(0, TIOCGLTC, (char *)&oltc); |
| 3197 | #if defined(LNOFLSH) |
| 3198 | ioctl(0, TIOCLGET, (char *)&autoflush); |
| 3199 | autoflush = !(autoflush&LNOFLSH); /* if LNOFLSH, no autoflush */ |
| 3200 | #else /* LNOFLSH */ |
| 3201 | autoflush = 1; |
| 3202 | #endif /* LNOFLSH */ |
| 3203 | ntc = otc; |
| 3204 | nltc = oltc; |
| 3205 | nttyb = ottyb; |
| 3206 | setbuf(stdin, (char *)0); |
| 3207 | setbuf(stdout, (char *)0); |
| 3208 | prompt = argv[0]; |
| 3209 | if (argc > 1 && !strcmp(argv[1], "-d")) { |
| 3210 | debug = 1; |
| 3211 | argv++; |
| 3212 | argc--; |
| 3213 | } |
| 3214 | if (argc > 1 && !strcmp(argv[1], "-n")) { |
| 3215 | argv++; |
| 3216 | argc--; |
| 3217 | if (argc > 1) { /* get file name */ |
| 3218 | NetTrace = fopen(argv[1], "w"); |
| 3219 | argv++; |
| 3220 | argc--; |
| 3221 | if (NetTrace == NULL) { |
| 3222 | NetTrace = stdout; |
| 3223 | } |
| 3224 | } |
| 3225 | } |
| 3226 | #if defined(TN3270) && defined(unix) |
| 3227 | if (argc > 1 && !strcmp(argv[1], "-t")) { |
| 3228 | argv++; |
| 3229 | argc--; |
| 3230 | if (argc > 1) { /* get command name */ |
| 3231 | transcom = tline; |
| 3232 | (void) strcpy(transcom, argv[1]); |
| 3233 | argv++; |
| 3234 | argc--; |
| 3235 | } |
| 3236 | } |
| 3237 | #endif /* defined(TN3270) && defined(unix) */ |
| 3238 | if (argc != 1) { |
| 3239 | if (setjmp(toplevel) != 0) |
| 3240 | Exit(0); |
| 3241 | tn(argc, argv); |
| 3242 | } |
| 3243 | setjmp(toplevel); |
| 3244 | for (;;) |
| 3245 | command(1); |
| 3246 | } |