Commit | Line | Data |
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3e91ea2a GM |
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"; | |
58f9a26f | 26 | #endif /* not lint */ |
3e91ea2a GM |
27 | |
28 | #ifndef lint | |
29 | static char sccsid[] = "@(#)telnet.c 3.1 10/29/86"; | |
58f9a26f | 30 | #endif /* not lint */ |
3e91ea2a GM |
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" | |
04b5f59e | 117 | #include "general.h" |
3e91ea2a GM |
118 | #endif /* defined(TN3270) */ |
119 | ||
120 | ||
121 | ||
122 | #ifndef FD_SETSIZE | |
123 | /* | |
124 | * The following is defined just in case someone should want to run | |
125 | * this telnet on a 4.2 system. | |
126 | * | |
127 | */ | |
128 | ||
129 | #define FD_SET(n, p) ((p)->fds_bits[0] |= (1<<(n))) | |
130 | #define FD_CLR(n, p) ((p)->fds_bits[0] &= ~(1<<(n))) | |
131 | #define FD_ISSET(n, p) ((p)->fds_bits[0] & (1<<(n))) | |
132 | #define FD_ZERO(p) ((p)->fds_bits[0] = 0) | |
133 | ||
134 | #endif | |
135 | \f | |
136 | #define strip(x) ((x)&0x7f) | |
137 | #define min(x,y) ((x<y)? x:y) | |
138 | ||
139 | #if defined(TN3270) | |
0d3c45d4 | 140 | static char Ibuf[8*BUFSIZ], *Ifrontp, *Ibackp; |
3e91ea2a GM |
141 | #endif /* defined(TN3270) */ |
142 | ||
0d3c45d4 | 143 | static char ttyobuf[2*BUFSIZ], *tfrontp, *tbackp; |
3e91ea2a GM |
144 | #define TTYADD(c) { if (!(SYNCHing||flushout)) { *tfrontp++ = c; } } |
145 | #define TTYLOC() (tfrontp) | |
146 | #define TTYMAX() (ttyobuf+sizeof ttyobuf-1) | |
147 | #define TTYMIN() (netobuf) | |
148 | #define TTYBYTES() (tfrontp-tbackp) | |
149 | #define TTYROOM() (TTYMAX()-TTYLOC()+1) | |
150 | ||
0d3c45d4 | 151 | static char netobuf[2*BUFSIZ], *nfrontp, *nbackp; |
3e91ea2a GM |
152 | #define NETADD(c) { *nfrontp++ = c; } |
153 | #define NET2ADD(c1,c2) { NETADD(c1); NETADD(c2); } | |
154 | #define NETLOC() (nfrontp) | |
155 | #define NETMAX() (netobuf+sizeof netobuf-1) | |
156 | #define NETBYTES() (nfrontp-nbackp) | |
157 | #define NETROOM() (NETMAX()-NETLOC()+1) | |
0d3c45d4 | 158 | static char *neturg; /* one past last byte of urgent data */ |
3e91ea2a | 159 | |
0d3c45d4 GM |
160 | static char subbuffer[100], |
161 | *subpointer, *subend; /* buffer for sub-options */ | |
3e91ea2a GM |
162 | #define SB_CLEAR() subpointer = subbuffer; |
163 | #define SB_TERM() subend = subpointer; | |
164 | #define SB_ACCUM(c) if (subpointer < (subbuffer+sizeof subbuffer)) { \ | |
165 | *subpointer++ = (c); \ | |
166 | } | |
167 | ||
168 | static char sb_terminal[] = { IAC, SB, | |
169 | TELOPT_TTYPE, TELQUAL_IS, | |
170 | 'I', 'B', 'M', '-', '3', '2', '7', '8', '-', '2', | |
171 | IAC, SE }; | |
172 | #define SBTERMMODEL 13 | |
173 | ||
174 | ||
0d3c45d4 GM |
175 | static char hisopts[256]; |
176 | static char myopts[256]; | |
3e91ea2a GM |
177 | |
178 | static char doopt[] = { IAC, DO, '%', 'c', 0 }; | |
179 | static char dont[] = { IAC, DONT, '%', 'c', 0 }; | |
180 | static char will[] = { IAC, WILL, '%', 'c', 0 }; | |
181 | static char wont[] = { IAC, WONT, '%', 'c', 0 }; | |
182 | ||
183 | struct cmd { | |
184 | char *name; /* command name */ | |
185 | char *help; /* help string */ | |
186 | int (*handler)(); /* routine which executes command */ | |
187 | int dohelp; /* Should we give general help information? */ | |
188 | int needconnect; /* Do we need to be connected to execute? */ | |
189 | }; | |
190 | ||
0d3c45d4 | 191 | static char sibuf[BUFSIZ], *sbp; |
3e91ea2a GM |
192 | static char tibuf[BUFSIZ], *tbp; |
193 | static fd_set ibits, obits, xbits; | |
194 | ||
195 | ||
196 | static int | |
0d3c45d4 GM |
197 | connected, |
198 | net, | |
199 | scc, | |
200 | tcc, | |
201 | showoptions, | |
202 | In3270, /* Are we in 3270 mode? */ | |
203 | ISend, /* trying to send network data in */ | |
3e91ea2a | 204 | debug = 0, |
0d3c45d4 GM |
205 | crmod, |
206 | netdata, | |
04b5f59e | 207 | askedSGA = 0, /* We have talked about suppress go ahead */ |
3e91ea2a GM |
208 | telnetport = 1; |
209 | ||
0d3c45d4 | 210 | static FILE *NetTrace = 0; /* Not in bss, since needs to stay */ |
3e91ea2a GM |
211 | |
212 | #define CONTROL(x) ((x)&0x1f) /* CTRL(x) is not portable */ | |
213 | ||
214 | static char | |
215 | *prompt = 0, | |
0d3c45d4 GM |
216 | escape, |
217 | echoc; | |
3e91ea2a GM |
218 | |
219 | static int | |
0d3c45d4 GM |
220 | SYNCHing, /* we are in TELNET SYNCH mode */ |
221 | flushout, /* flush output */ | |
3e91ea2a | 222 | autoflush = 0, /* flush output when interrupting? */ |
0d3c45d4 GM |
223 | autosynch, /* send interrupt characters with SYNCH? */ |
224 | localchars, /* we recognize interrupt/quit */ | |
225 | donelclchars, /* the user has set "localchars" */ | |
226 | dontlecho; /* do we suppress local echoing right now? */ | |
3e91ea2a GM |
227 | |
228 | /* The following are some tn3270 specific flags */ | |
229 | #if defined(TN3270) | |
230 | ||
231 | static int | |
0d3c45d4 | 232 | Sent3270TerminalType; /* Have we said we are a 3270? */ |
3e91ea2a | 233 | |
04b5f59e GM |
234 | /* |
235 | * Telnet receiver states for fsm | |
236 | */ | |
237 | #define TS_DATA 0 | |
238 | #define TS_IAC 1 | |
239 | #define TS_WILL 2 | |
240 | #define TS_WONT 3 | |
241 | #define TS_DO 4 | |
242 | #define TS_DONT 5 | |
243 | #define TS_CR 6 | |
244 | #define TS_SB 7 /* sub-option collection */ | |
245 | #define TS_SE 8 /* looking for sub-option end */ | |
246 | ||
247 | static int telrcv_state = TS_DATA; | |
3e91ea2a GM |
248 | /* Some real, live, globals. */ |
249 | int | |
250 | #if defined(unix) | |
0d3c45d4 | 251 | HaveInput, /* There is input available to scan */ |
3e91ea2a | 252 | #endif /* defined(unix) */ |
0d3c45d4 GM |
253 | tout, /* Output file descriptor */ |
254 | tin; /* Input file descriptor */ | |
3e91ea2a GM |
255 | #if defined(unix) |
256 | char *transcom = 0; /* transparent mode command (default: none) */ | |
257 | #endif /* defined(unix) */ | |
258 | ||
259 | #else /* defined(TN3270) */ | |
0d3c45d4 | 260 | static int tin, tout; /* file descriptors */ |
3e91ea2a GM |
261 | #endif /* defined(TN3270) */ |
262 | ||
263 | static char line[200]; | |
264 | #if defined(TN3270) && defined(unix) | |
265 | static char tline[200]; | |
266 | #endif /* defined(TN3270) && defined(unix) */ | |
0d3c45d4 | 267 | static int margc; |
3e91ea2a GM |
268 | static char *margv[20]; |
269 | ||
0d3c45d4 | 270 | static jmp_buf toplevel = 0; |
3e91ea2a GM |
271 | static jmp_buf peerdied; |
272 | ||
273 | extern int errno; | |
274 | ||
275 | ||
276 | static struct sockaddr_in sin; | |
277 | ||
278 | static struct servent *sp = 0; | |
279 | ||
280 | static struct tchars otc = { 0 }, ntc = { 0 }; | |
281 | static struct ltchars oltc = { 0 }, nltc = { 0 }; | |
282 | static struct sgttyb ottyb = { 0 }, nttyb = { 0 }; | |
0d3c45d4 | 283 | static int flushline; |
3e91ea2a | 284 | |
0d3c45d4 | 285 | static char *hostname; |
3e91ea2a GM |
286 | static char hnamebuf[32]; |
287 | ||
288 | /* | |
289 | * The following are some clocks used to decide how to interpret | |
290 | * the relationship between various variables. | |
291 | */ | |
292 | ||
293 | static struct { | |
294 | int | |
295 | system, /* what the current time is */ | |
296 | echotoggle, /* last time user entered echo character */ | |
297 | modenegotiated, /* last time operating mode negotiated */ | |
298 | didnetreceive, /* last time we read data from network */ | |
299 | gotDM; /* when did we last see a data mark */ | |
0d3c45d4 | 300 | } clocks; |
3e91ea2a GM |
301 | |
302 | #define settimer(x) clocks.x = clocks.system++ | |
303 | \f | |
0d3c45d4 GM |
304 | /* |
305 | * Initialize variables. | |
306 | */ | |
307 | ||
308 | static void | |
309 | tninit() | |
310 | { | |
0d3c45d4 GM |
311 | Ifrontp = Ibackp = Ibuf; |
312 | tfrontp = tbackp = ttyobuf; | |
313 | nfrontp = nbackp = netobuf; | |
314 | ||
315 | /* Don't change telnetport */ | |
04b5f59e GM |
316 | SB_CLEAR(); |
317 | ClearArray(hisopts); | |
318 | ClearArray(myopts); | |
319 | sbp = sibuf; | |
320 | tbp = tibuf; | |
321 | ||
322 | connected = net = scc = tcc = In3270 = ISend = 0; | |
323 | telnetport = 0; | |
324 | ||
325 | SYNCHing = 0; | |
326 | Sent3270TerminalType = 0; | |
327 | ||
328 | #if defined(unix) | |
329 | HaveInput = 0; | |
330 | #endif /* defined(unix) */ | |
331 | errno = 0; | |
332 | ||
333 | flushline = 0; | |
0d3c45d4 GM |
334 | |
335 | /* Don't change NetTrace */ | |
336 | ||
337 | escape = CONTROL(']'); | |
338 | echoc = CONTROL('E'); | |
339 | ||
340 | flushline = 1; | |
341 | sp = getservbyname("telnet", "tcp"); | |
342 | if (sp == 0) { | |
343 | ExitString(stderr, "telnet: tcp/telnet: unknown service\n",1); | |
344 | /*NOTREACHED*/ | |
345 | } | |
346 | ||
347 | #if defined(TN3270) | |
04b5f59e GM |
348 | init_ctlr(); /* Initialize some things */ |
349 | init_keyboard(); | |
350 | init_screen(); | |
351 | init_system(); | |
0d3c45d4 GM |
352 | #endif /* defined(TN3270) */ |
353 | } | |
354 | \f | |
3e91ea2a GM |
355 | /* |
356 | * Various utility routines. | |
357 | */ | |
358 | ||
359 | static void | |
360 | makeargv() | |
361 | { | |
362 | register char *cp; | |
363 | register char **argp = margv; | |
364 | ||
365 | margc = 0; | |
366 | for (cp = line; *cp;) { | |
367 | while (isspace(*cp)) | |
368 | cp++; | |
369 | if (*cp == '\0') | |
370 | break; | |
371 | *argp++ = cp; | |
372 | margc += 1; | |
373 | while (*cp != '\0' && !isspace(*cp)) | |
374 | cp++; | |
375 | if (*cp == '\0') | |
376 | break; | |
377 | *cp++ = '\0'; | |
378 | } | |
379 | *argp++ = 0; | |
380 | } | |
381 | ||
382 | static char *ambiguous; /* special return value */ | |
383 | #define Ambiguous(t) ((t)&ambiguous) | |
384 | ||
385 | ||
386 | static char ** | |
387 | genget(name, table, next) | |
388 | char *name; /* name to match */ | |
389 | char **table; /* name entry in table */ | |
390 | char **(*next)(); /* routine to return next entry in table */ | |
391 | { | |
392 | register char *p, *q; | |
393 | register char **c, **found; | |
394 | register int nmatches, longest; | |
395 | ||
396 | longest = 0; | |
397 | nmatches = 0; | |
398 | found = 0; | |
399 | for (c = table; (p = *c) != 0; c = (*next)(c)) { | |
400 | for (q = name; | |
401 | (*q == *p) || (isupper(*q) && tolower(*q) == *p); p++, q++) | |
402 | if (*q == 0) /* exact match? */ | |
403 | return (c); | |
404 | if (!*q) { /* the name was a prefix */ | |
405 | if (q - name > longest) { | |
406 | longest = q - name; | |
407 | nmatches = 1; | |
408 | found = c; | |
409 | } else if (q - name == longest) | |
410 | nmatches++; | |
411 | } | |
412 | } | |
413 | if (nmatches > 1) | |
414 | return Ambiguous(char **); | |
415 | return (found); | |
416 | } | |
417 | ||
418 | /* | |
419 | * Make a character string into a number. | |
420 | * | |
421 | * Todo: 1. Could take random integers (12, 0x12, 012, 0b1). | |
422 | */ | |
423 | ||
424 | static | |
425 | special(s) | |
426 | register char *s; | |
427 | { | |
428 | register char c; | |
429 | char b; | |
430 | ||
431 | switch (*s) { | |
432 | case '^': | |
433 | b = *++s; | |
434 | if (b == '?') { | |
435 | c = b | 0x40; /* DEL */ | |
436 | } else { | |
437 | c = b & 0x1f; | |
438 | } | |
439 | break; | |
440 | default: | |
441 | c = *s; | |
442 | break; | |
443 | } | |
444 | return c; | |
445 | } | |
446 | ||
447 | /* | |
448 | * Construct a control character sequence | |
449 | * for a special character. | |
450 | */ | |
451 | static char * | |
452 | control(c) | |
453 | register int c; | |
454 | { | |
455 | static char buf[3]; | |
456 | ||
457 | if (c == 0x7f) | |
458 | return ("^?"); | |
459 | if (c == '\377') { | |
460 | return "off"; | |
461 | } | |
462 | if (c >= 0x20) { | |
463 | buf[0] = c; | |
464 | buf[1] = 0; | |
465 | } else { | |
466 | buf[0] = '^'; | |
467 | buf[1] = '@'+c; | |
468 | buf[2] = 0; | |
469 | } | |
470 | return (buf); | |
471 | } | |
472 | ||
473 | ||
474 | /* | |
475 | * upcase() | |
476 | * | |
477 | * Upcase (in place) the argument. | |
478 | */ | |
479 | ||
480 | static void | |
481 | upcase(argument) | |
482 | register char *argument; | |
483 | { | |
484 | register int c; | |
485 | ||
486 | while ((c = *argument) != 0) { | |
487 | if (islower(c)) { | |
488 | *argument = toupper(c); | |
489 | } | |
490 | argument++; | |
491 | } | |
492 | } | |
493 | \f | |
494 | /* | |
495 | * The following are routines used to print out debugging information. | |
496 | */ | |
497 | ||
498 | ||
499 | static void | |
500 | Dump(direction, buffer, length) | |
501 | char direction; | |
502 | char *buffer; | |
503 | int length; | |
504 | { | |
505 | # define BYTES_PER_LINE 32 | |
506 | # define min(x,y) ((x<y)? x:y) | |
507 | char *pThis; | |
508 | int offset; | |
509 | ||
510 | offset = 0; | |
511 | ||
512 | while (length) { | |
513 | /* print one line */ | |
514 | fprintf(NetTrace, "%c 0x%x\t", direction, offset); | |
515 | pThis = buffer; | |
516 | buffer = buffer+min(length, BYTES_PER_LINE); | |
517 | while (pThis < buffer) { | |
518 | fprintf(NetTrace, "%.2x", (*pThis)&0xff); | |
519 | pThis++; | |
520 | } | |
521 | fprintf(NetTrace, "\n"); | |
522 | length -= BYTES_PER_LINE; | |
523 | offset += BYTES_PER_LINE; | |
524 | if (length < 0) { | |
525 | return; | |
526 | } | |
527 | /* find next unique line */ | |
528 | } | |
529 | } | |
530 | ||
531 | ||
532 | /*VARARGS*/ | |
533 | static void | |
534 | printoption(direction, fmt, option, what) | |
535 | char *direction, *fmt; | |
536 | int option, what; | |
537 | { | |
538 | if (!showoptions) | |
539 | return; | |
540 | fprintf(NetTrace, "%s ", direction+1); | |
541 | if (fmt == doopt) | |
542 | fmt = "do"; | |
543 | else if (fmt == dont) | |
544 | fmt = "dont"; | |
545 | else if (fmt == will) | |
546 | fmt = "will"; | |
547 | else if (fmt == wont) | |
548 | fmt = "wont"; | |
549 | else | |
550 | fmt = "???"; | |
551 | if (option < (sizeof telopts/sizeof telopts[0])) | |
552 | fprintf(NetTrace, "%s %s", fmt, telopts[option]); | |
553 | else | |
554 | fprintf(NetTrace, "%s %d", fmt, option); | |
555 | if (*direction == '<') { | |
556 | fprintf(NetTrace, "\r\n"); | |
557 | return; | |
558 | } | |
559 | fprintf(NetTrace, " (%s)\r\n", what ? "reply" : "don't reply"); | |
560 | } | |
561 | ||
562 | static void | |
563 | printsub(direction, pointer, length) | |
564 | char *direction, /* "<" or ">" */ | |
565 | *pointer; /* where suboption data sits */ | |
566 | int length; /* length of suboption data */ | |
567 | { | |
568 | if (showoptions) { | |
569 | fprintf(NetTrace, "%s suboption ", | |
570 | (direction[0] == '<')? "Received":"Sent"); | |
571 | switch (pointer[0]) { | |
572 | case TELOPT_TTYPE: | |
573 | fprintf(NetTrace, "Terminal type "); | |
574 | switch (pointer[1]) { | |
575 | case TELQUAL_IS: | |
576 | { | |
577 | char tmpbuf[sizeof subbuffer]; | |
578 | int minlen = min(length, sizeof tmpbuf); | |
579 | ||
580 | bcopy(pointer+2, tmpbuf, minlen); | |
581 | tmpbuf[minlen-1] = 0; | |
582 | fprintf(NetTrace, "is %s.\n", tmpbuf); | |
583 | } | |
584 | break; | |
585 | case TELQUAL_SEND: | |
586 | fprintf(NetTrace, "- request to send.\n"); | |
587 | break; | |
588 | default: | |
589 | fprintf(NetTrace, | |
590 | "- unknown qualifier %d (0x%x).\n", pointer[1]); | |
591 | } | |
592 | break; | |
593 | default: | |
594 | fprintf(NetTrace, "Unknown option %d (0x%x)\n", | |
595 | pointer[0], pointer[0]); | |
596 | } | |
597 | } | |
598 | } | |
599 | \f | |
600 | /* | |
601 | * Check to see if any out-of-band data exists on a socket (for | |
602 | * Telnet "synch" processing). | |
603 | */ | |
604 | ||
605 | static int | |
606 | stilloob(s) | |
607 | int s; /* socket number */ | |
608 | { | |
609 | static struct timeval timeout = { 0 }; | |
610 | fd_set excepts; | |
611 | int value; | |
612 | ||
613 | do { | |
614 | FD_ZERO(&excepts); | |
615 | FD_SET(s, &excepts); | |
616 | value = select(s+1, (fd_set *)0, (fd_set *)0, &excepts, &timeout); | |
617 | } while ((value == -1) && (errno == EINTR)); | |
618 | ||
619 | if (value < 0) { | |
620 | perror("select"); | |
621 | quit(); | |
622 | } | |
623 | if (FD_ISSET(s, &excepts)) { | |
624 | return 1; | |
625 | } else { | |
626 | return 0; | |
627 | } | |
628 | } | |
629 | ||
630 | ||
631 | /* | |
632 | * netflush | |
633 | * Send as much data as possible to the network, | |
634 | * handling requests for urgent data. | |
635 | * | |
636 | * The return value indicates whether we did any | |
637 | * useful work. | |
638 | */ | |
639 | ||
640 | ||
641 | int | |
642 | netflush() | |
643 | { | |
644 | int n; | |
645 | ||
646 | if ((n = nfrontp - nbackp) > 0) { | |
647 | if (!neturg) { | |
648 | n = write(net, nbackp, n); /* normal write */ | |
649 | } else { | |
650 | n = neturg - nbackp; | |
651 | /* | |
652 | * In 4.2 (and 4.3) systems, there is some question about | |
653 | * what byte in a sendOOB operation is the "OOB" data. | |
654 | * To make ourselves compatible, we only send ONE byte | |
655 | * out of band, the one WE THINK should be OOB (though | |
656 | * we really have more the TCP philosophy of urgent data | |
657 | * rather than the Unix philosophy of OOB data). | |
658 | */ | |
659 | if (n > 1) { | |
660 | n = send(net, nbackp, n-1, 0); /* send URGENT all by itself */ | |
661 | } else { | |
662 | n = send(net, nbackp, n, MSG_OOB); /* URGENT data */ | |
663 | } | |
664 | } | |
665 | } | |
666 | if (n < 0) { | |
667 | if (errno != ENOBUFS && errno != EWOULDBLOCK) { | |
668 | setcommandmode(); | |
669 | perror(hostname); | |
670 | close(net); | |
671 | neturg = 0; | |
672 | longjmp(peerdied, -1); | |
673 | /*NOTREACHED*/ | |
674 | } | |
675 | n = 0; | |
676 | } | |
677 | if (netdata && n) { | |
678 | Dump('>', nbackp, n); | |
679 | } | |
680 | nbackp += n; | |
681 | if (nbackp >= neturg) { | |
682 | neturg = 0; | |
683 | } | |
684 | if (nbackp == nfrontp) { | |
685 | nbackp = nfrontp = netobuf; | |
686 | } | |
687 | return n > 0; | |
688 | } | |
689 | \f | |
690 | /* | |
691 | * nextitem() | |
692 | * | |
693 | * Return the address of the next "item" in the TELNET data | |
694 | * stream. This will be the address of the next character if | |
695 | * the current address is a user data character, or it will | |
696 | * be the address of the character following the TELNET command | |
697 | * if the current address is a TELNET IAC ("I Am a Command") | |
698 | * character. | |
699 | */ | |
700 | ||
701 | static char * | |
702 | nextitem(current) | |
703 | char *current; | |
704 | { | |
705 | if ((*current&0xff) != IAC) { | |
706 | return current+1; | |
707 | } | |
708 | switch (*(current+1)&0xff) { | |
709 | case DO: | |
710 | case DONT: | |
711 | case WILL: | |
712 | case WONT: | |
713 | return current+3; | |
714 | case SB: /* loop forever looking for the SE */ | |
715 | { | |
716 | register char *look = current+2; | |
717 | ||
718 | for (;;) { | |
719 | if ((*look++&0xff) == IAC) { | |
720 | if ((*look++&0xff) == SE) { | |
721 | return look; | |
722 | } | |
723 | } | |
724 | } | |
725 | } | |
726 | default: | |
727 | return current+2; | |
728 | } | |
729 | } | |
730 | /* | |
731 | * netclear() | |
732 | * | |
733 | * We are about to do a TELNET SYNCH operation. Clear | |
734 | * the path to the network. | |
735 | * | |
736 | * Things are a bit tricky since we may have sent the first | |
737 | * byte or so of a previous TELNET command into the network. | |
738 | * So, we have to scan the network buffer from the beginning | |
739 | * until we are up to where we want to be. | |
740 | * | |
741 | * A side effect of what we do, just to keep things | |
742 | * simple, is to clear the urgent data pointer. The principal | |
743 | * caller should be setting the urgent data pointer AFTER calling | |
744 | * us in any case. | |
745 | */ | |
746 | ||
747 | static void | |
748 | netclear() | |
749 | { | |
750 | register char *thisitem, *next; | |
751 | char *good; | |
752 | #define wewant(p) ((nfrontp > p) && ((*p&0xff) == IAC) && \ | |
753 | ((*(p+1)&0xff) != EC) && ((*(p+1)&0xff) != EL)) | |
754 | ||
755 | thisitem = netobuf; | |
756 | ||
757 | while ((next = nextitem(thisitem)) <= nbackp) { | |
758 | thisitem = next; | |
759 | } | |
760 | ||
761 | /* Now, thisitem is first before/at boundary. */ | |
762 | ||
763 | good = netobuf; /* where the good bytes go */ | |
764 | ||
765 | while (nfrontp > thisitem) { | |
766 | if (wewant(thisitem)) { | |
767 | int length; | |
768 | ||
769 | next = thisitem; | |
770 | do { | |
771 | next = nextitem(next); | |
772 | } while (wewant(next) && (nfrontp > next)); | |
773 | length = next-thisitem; | |
774 | bcopy(thisitem, good, length); | |
775 | good += length; | |
776 | thisitem = next; | |
777 | } else { | |
778 | thisitem = nextitem(thisitem); | |
779 | } | |
780 | } | |
781 | ||
782 | nbackp = netobuf; | |
783 | nfrontp = good; /* next byte to be sent */ | |
784 | neturg = 0; | |
785 | } | |
786 | \f | |
787 | /* | |
788 | * These routines add various telnet commands to the data stream. | |
789 | */ | |
790 | ||
791 | #if defined(NOT43) | |
792 | static int | |
793 | #else /* defined(NOT43) */ | |
794 | static void | |
795 | #endif /* defined(NOT43) */ | |
796 | dosynch() | |
797 | { | |
798 | netclear(); /* clear the path to the network */ | |
799 | NET2ADD(IAC, DM); | |
800 | neturg = NETLOC()-1; /* Some systems are off by one XXX */ | |
801 | ||
802 | #if defined(NOT43) | |
803 | return 0; | |
804 | #endif /* defined(NOT43) */ | |
805 | } | |
806 | ||
807 | static void | |
808 | doflush() | |
809 | { | |
810 | NET2ADD(IAC, DO); | |
811 | NETADD(TELOPT_TM); | |
812 | flushline = 1; | |
813 | flushout = 1; | |
814 | ttyflush(); | |
815 | /* do printoption AFTER flush, otherwise the output gets tossed... */ | |
816 | printoption("<SENT", doopt, TELOPT_TM, 0); | |
817 | } | |
818 | ||
819 | static void | |
820 | intp() | |
821 | { | |
822 | NET2ADD(IAC, IP); | |
823 | if (autoflush) { | |
824 | doflush(); | |
825 | } | |
826 | if (autosynch) { | |
827 | dosynch(); | |
828 | } | |
829 | } | |
830 | ||
831 | static void | |
832 | sendbrk() | |
833 | { | |
834 | NET2ADD(IAC, BREAK); | |
835 | if (autoflush) { | |
836 | doflush(); | |
837 | } | |
838 | if (autosynch) { | |
839 | dosynch(); | |
840 | } | |
841 | } | |
842 | \f | |
843 | /* | |
844 | * Send as much data as possible to the terminal. | |
845 | * | |
846 | * The return value indicates whether we did any | |
847 | * useful work. | |
848 | */ | |
849 | ||
850 | ||
851 | static int | |
852 | ttyflush() | |
853 | { | |
854 | int n; | |
855 | ||
856 | if ((n = tfrontp - tbackp) > 0) { | |
857 | if (!(SYNCHing||flushout)) { | |
858 | n = write(tout, tbackp, n); | |
859 | } else { | |
860 | ioctl(fileno(stdout), TIOCFLUSH, (char *) 0); | |
861 | /* we leave 'n' alone! */ | |
862 | } | |
863 | } | |
864 | if (n >= 0) { | |
865 | tbackp += n; | |
866 | if (tbackp == tfrontp) { | |
867 | tbackp = tfrontp = ttyobuf; | |
868 | } | |
869 | } | |
870 | return n > 0; | |
871 | } | |
872 | ||
873 | #if defined(TN3270) | |
874 | ||
875 | #if defined(unix) | |
876 | static void | |
877 | inputAvailable() | |
878 | { | |
879 | HaveInput = 1; | |
880 | } | |
881 | #endif /* defined(unix) */ | |
882 | ||
883 | void | |
884 | outputPurge() | |
885 | { | |
886 | int tmp = flushout; | |
887 | ||
888 | flushout = 1; | |
889 | ||
890 | ttyflush(); | |
891 | ||
892 | flushout = tmp; | |
893 | } | |
894 | ||
895 | #endif /* defined(TN3270) */ | |
896 | \f | |
897 | #if defined(unix) | |
898 | /* | |
899 | * Various signal handling routines. | |
900 | */ | |
901 | ||
902 | static void | |
903 | deadpeer() | |
904 | { | |
905 | setcommandmode(); | |
906 | longjmp(peerdied, -1); | |
907 | } | |
908 | ||
909 | static void | |
910 | intr() | |
911 | { | |
912 | if (localchars) { | |
913 | intp(); | |
914 | return; | |
915 | } | |
916 | setcommandmode(); | |
917 | longjmp(toplevel, -1); | |
918 | } | |
919 | ||
920 | static void | |
921 | intr2() | |
922 | { | |
923 | if (localchars) { | |
924 | sendbrk(); | |
925 | return; | |
926 | } | |
927 | } | |
928 | ||
929 | static void | |
930 | doescape() | |
931 | { | |
932 | command(0); | |
933 | } | |
934 | #endif /* defined(unix) */ | |
935 | \f | |
936 | static int globalmode = 0; | |
937 | /* Various modes */ | |
938 | #define MODE_LINE(m) (modelist[m].modetype & LINE) | |
939 | #define MODE_LOCAL_CHARS(m) (modelist[m].modetype & LOCAL_CHARS) | |
940 | ||
941 | #define LOCAL_CHARS 0x01 /* Characters processed locally */ | |
942 | #define LINE 0x02 /* Line-by-line mode of operation */ | |
943 | ||
944 | static struct { | |
945 | char *modedescriptions; | |
946 | char modetype; | |
947 | } modelist[] = { | |
948 | { "telnet command mode", 0 }, | |
949 | { "character-at-a-time mode", 0 }, | |
950 | { "character-at-a-time mode (local echo)", LOCAL_CHARS }, | |
951 | { "line-by-line mode (remote echo)", LINE | LOCAL_CHARS }, | |
952 | { "line-by-line mode", LINE | LOCAL_CHARS }, | |
953 | { "line-by-line mode (local echoing suppressed)", LINE | LOCAL_CHARS }, | |
954 | { "3270 mode", 0 }, | |
955 | }; | |
956 | /* | |
957 | * Mode - set up terminal to a specific mode. | |
958 | */ | |
959 | ||
960 | ||
961 | static void | |
962 | mode(f) | |
963 | register int f; | |
964 | { | |
965 | static int prevmode = 0; | |
966 | struct tchars *tc; | |
967 | struct tchars tc3; | |
968 | struct ltchars *ltc; | |
969 | struct sgttyb sb; | |
970 | int onoff; | |
971 | #if defined(unix) | |
972 | int old; | |
973 | #endif /* defined(unix) */ | |
974 | struct tchars notc2; | |
975 | struct ltchars noltc2; | |
976 | static struct tchars notc = { -1, -1, -1, -1, -1, -1 }; | |
977 | static struct ltchars noltc = { -1, -1, -1, -1, -1, -1 }; | |
978 | ||
979 | globalmode = f; | |
980 | if (prevmode == f) | |
981 | return; | |
982 | #if defined(unix) | |
983 | old = prevmode; | |
984 | #endif /* defined(unix) */ | |
985 | prevmode = f; | |
986 | sb = nttyb; | |
987 | ||
988 | switch (f) { | |
989 | ||
990 | case 0: | |
991 | onoff = 0; | |
992 | tc = &otc; | |
993 | ltc = &oltc; | |
994 | break; | |
995 | ||
996 | case 1: /* remote character processing, remote echo */ | |
997 | case 2: /* remote character processing, local echo */ | |
998 | case 6: /* 3270 mode - like 1, but with xon/xoff local */ | |
999 | /* (might be nice to have "6" in telnet also...) */ | |
1000 | sb.sg_flags |= CBREAK; | |
1001 | if ((f == 1) || (f == 6)) { | |
1002 | sb.sg_flags &= ~(ECHO|CRMOD); | |
1003 | } else { | |
1004 | sb.sg_flags |= ECHO|CRMOD; | |
1005 | } | |
1006 | sb.sg_erase = sb.sg_kill = -1; | |
1007 | if (f == 6) { | |
1008 | tc = &tc3; | |
1009 | tc3 = notc; | |
1010 | /* get XON, XOFF characters */ | |
1011 | tc3.t_startc = otc.t_startc; | |
1012 | tc3.t_stopc = otc.t_stopc; | |
1013 | } else { | |
1014 | /* | |
1015 | * If user hasn't specified one way or the other, | |
1016 | * then default to not trapping signals. | |
1017 | */ | |
1018 | if (!donelclchars) { | |
1019 | localchars = 0; | |
1020 | } | |
1021 | if (localchars) { | |
1022 | notc2 = notc; | |
1023 | notc2.t_intrc = ntc.t_intrc; | |
1024 | notc2.t_quitc = ntc.t_quitc; | |
1025 | tc = ¬c2; | |
1026 | } else { | |
1027 | tc = ¬c; | |
1028 | } | |
1029 | } | |
1030 | ltc = &noltc; | |
1031 | onoff = 1; | |
1032 | break; | |
1033 | case 3: /* local character processing, remote echo */ | |
1034 | case 4: /* local character processing, local echo */ | |
1035 | case 5: /* local character processing, no echo */ | |
1036 | sb.sg_flags &= ~CBREAK; | |
1037 | sb.sg_flags |= CRMOD; | |
1038 | if (f == 4) | |
1039 | sb.sg_flags |= ECHO; | |
1040 | else | |
1041 | sb.sg_flags &= ~ECHO; | |
1042 | notc2 = ntc; | |
1043 | tc = ¬c2; | |
1044 | noltc2 = oltc; | |
1045 | ltc = &noltc2; | |
de7a7ce6 | 1046 | #if defined(unix) |
3e91ea2a GM |
1047 | /* |
1048 | * If user hasn't specified one way or the other, | |
1049 | * then default to trapping signals. | |
1050 | */ | |
1051 | if (!donelclchars) { | |
1052 | localchars = 1; | |
1053 | } | |
1054 | if (localchars) { | |
1055 | notc2.t_brkc = nltc.t_flushc; | |
1056 | noltc2.t_flushc = -1; | |
1057 | } else { | |
1058 | notc2.t_intrc = notc2.t_quitc = -1; | |
1059 | } | |
de7a7ce6 GM |
1060 | #else /* defined(unix) */ |
1061 | notc2.t_intrc = -1; | |
1062 | #endif /* defined(unix) */ | |
3e91ea2a GM |
1063 | noltc2.t_suspc = escape; |
1064 | noltc2.t_dsuspc = -1; | |
1065 | onoff = 1; | |
1066 | break; | |
1067 | ||
1068 | default: | |
1069 | return; | |
1070 | } | |
1071 | ioctl(tin, TIOCSLTC, (char *)ltc); | |
1072 | ioctl(tin, TIOCSETC, (char *)tc); | |
1073 | ioctl(tin, TIOCSETP, (char *)&sb); | |
1074 | #if (!defined(TN3270)) || ((!defined(NOT43)) || defined(PUTCHAR)) | |
1075 | ioctl(tin, FIONBIO, (char *)&onoff); | |
1076 | ioctl(tout, FIONBIO, (char *)&onoff); | |
1077 | #endif /* (!defined(TN3270)) || ((!defined(NOT43)) || defined(PUTCHAR)) */ | |
1078 | #if defined(TN3270) && !defined(DEBUG) | |
1079 | ioctl(tin, FIOASYNC, (char *)&onoff); | |
1080 | #endif /* defined(TN3270) && !defined(DEBUG) */ | |
1081 | ||
1082 | #if defined(unix) | |
1083 | if (MODE_LINE(f)) { | |
1084 | signal(SIGTSTP, doescape); | |
1085 | } else if (MODE_LINE(old)) { | |
1086 | signal(SIGTSTP, SIG_DFL); | |
1087 | sigsetmask(sigblock(0) & ~(1<<(SIGTSTP-1))); | |
1088 | } | |
1089 | #endif /* defined(unix) */ | |
1090 | } | |
1091 | \f | |
1092 | /* | |
1093 | * These routines decides on what the mode should be (based on the values | |
1094 | * of various global variables). | |
1095 | */ | |
1096 | ||
1097 | ||
1098 | static | |
1099 | getconnmode() | |
1100 | { | |
1101 | static char newmode[16] = | |
1102 | { 4, 5, 3, 3, 2, 2, 1, 1, 6, 6, 6, 6, 6, 6, 6, 6 }; | |
1103 | int modeindex = 0; | |
1104 | ||
1105 | if (dontlecho && (clocks.echotoggle > clocks.modenegotiated)) { | |
1106 | modeindex += 1; | |
1107 | } | |
1108 | if (hisopts[TELOPT_ECHO]) { | |
1109 | modeindex += 2; | |
1110 | } | |
1111 | if (hisopts[TELOPT_SGA]) { | |
1112 | modeindex += 4; | |
1113 | } | |
1114 | if (In3270) { | |
1115 | modeindex += 8; | |
1116 | } | |
1117 | return newmode[modeindex]; | |
1118 | } | |
1119 | ||
1120 | void | |
1121 | setconnmode() | |
1122 | { | |
1123 | mode(getconnmode()); | |
1124 | } | |
1125 | ||
1126 | ||
1127 | void | |
1128 | setcommandmode() | |
1129 | { | |
1130 | mode(0); | |
1131 | } | |
1132 | \f | |
1133 | static void | |
1134 | willoption(option, reply) | |
1135 | int option, reply; | |
1136 | { | |
1137 | char *fmt; | |
1138 | ||
1139 | switch (option) { | |
1140 | ||
de7a7ce6 | 1141 | case TELOPT_ECHO: |
3e91ea2a | 1142 | # if defined(TN3270) |
de7a7ce6 GM |
1143 | /* |
1144 | * The following is a pain in the rear-end. | |
1145 | * Various IBM servers (some versions of Wiscnet, | |
1146 | * possibly Fibronics/Spartacus, and who knows who | |
1147 | * else) will NOT allow us to send "DO SGA" too early | |
1148 | * in the setup proceedings. On the other hand, | |
1149 | * 4.2 servers (telnetd) won't set SGA correctly. | |
1150 | * So, we are stuck. Empirically (but, based on | |
1151 | * a VERY small sample), the IBM servers don't send | |
1152 | * out anything about ECHO, so we postpone our sending | |
1153 | * "DO SGA" until we see "WILL ECHO" (which 4.2 servers | |
1154 | * DO send). | |
1155 | */ | |
1156 | { | |
de7a7ce6 GM |
1157 | if (askedSGA == 0) { |
1158 | askedSGA = 1; | |
1159 | if (!hisopts[TELOPT_SGA]) { | |
1160 | willoption(TELOPT_SGA, 0); | |
1161 | } | |
1162 | } | |
1163 | } | |
1164 | /* Fall through */ | |
3e91ea2a GM |
1165 | case TELOPT_EOR: |
1166 | case TELOPT_BINARY: | |
1167 | #endif /* defined(TN3270) */ | |
3e91ea2a GM |
1168 | case TELOPT_SGA: |
1169 | settimer(modenegotiated); | |
1170 | hisopts[option] = 1; | |
1171 | fmt = doopt; | |
1172 | setconnmode(); /* possibly set new tty mode */ | |
1173 | break; | |
1174 | ||
1175 | case TELOPT_TM: | |
1176 | return; /* Never reply to TM will's/wont's */ | |
1177 | ||
1178 | default: | |
1179 | fmt = dont; | |
1180 | break; | |
1181 | } | |
1182 | sprintf(nfrontp, fmt, option); | |
1183 | nfrontp += sizeof (dont) - 2; | |
1184 | if (reply) | |
1185 | printoption(">SENT", fmt, option, reply); | |
1186 | else | |
1187 | printoption("<SENT", fmt, option, reply); | |
1188 | } | |
1189 | ||
1190 | static void | |
1191 | wontoption(option, reply) | |
1192 | int option, reply; | |
1193 | { | |
1194 | char *fmt; | |
1195 | ||
1196 | switch (option) { | |
1197 | ||
1198 | case TELOPT_ECHO: | |
1199 | case TELOPT_SGA: | |
1200 | settimer(modenegotiated); | |
1201 | hisopts[option] = 0; | |
1202 | fmt = dont; | |
1203 | setconnmode(); /* Set new tty mode */ | |
1204 | break; | |
1205 | ||
1206 | case TELOPT_TM: | |
1207 | return; /* Never reply to TM will's/wont's */ | |
1208 | ||
1209 | default: | |
1210 | fmt = dont; | |
1211 | } | |
1212 | sprintf(nfrontp, fmt, option); | |
1213 | nfrontp += sizeof (doopt) - 2; | |
1214 | if (reply) | |
1215 | printoption(">SENT", fmt, option, reply); | |
1216 | else | |
1217 | printoption("<SENT", fmt, option, reply); | |
1218 | } | |
1219 | ||
1220 | static void | |
1221 | dooption(option) | |
1222 | int option; | |
1223 | { | |
1224 | char *fmt; | |
1225 | ||
1226 | switch (option) { | |
1227 | ||
1228 | case TELOPT_TM: | |
1229 | fmt = will; | |
1230 | break; | |
1231 | ||
1232 | # if defined(TN3270) | |
1233 | case TELOPT_EOR: | |
1234 | case TELOPT_BINARY: | |
1235 | # endif /* defined(TN3270) */ | |
1236 | case TELOPT_TTYPE: /* terminal type option */ | |
1237 | case TELOPT_SGA: /* no big deal */ | |
1238 | fmt = will; | |
1239 | myopts[option] = 1; | |
1240 | break; | |
1241 | ||
1242 | case TELOPT_ECHO: /* We're never going to echo... */ | |
1243 | default: | |
1244 | fmt = wont; | |
1245 | break; | |
1246 | } | |
1247 | sprintf(nfrontp, fmt, option); | |
1248 | nfrontp += sizeof (doopt) - 2; | |
1249 | printoption(">SENT", fmt, option, 0); | |
1250 | } | |
1251 | ||
1252 | /* | |
1253 | * suboption() | |
1254 | * | |
1255 | * Look at the sub-option buffer, and try to be helpful to the other | |
1256 | * side. | |
1257 | * | |
1258 | * Currently we recognize: | |
1259 | * | |
1260 | * Terminal type, send request. | |
1261 | */ | |
1262 | ||
1263 | static void | |
1264 | suboption() | |
1265 | { | |
1266 | printsub("<", subbuffer, subend-subbuffer+1); | |
1267 | switch (subbuffer[0]&0xff) { | |
1268 | case TELOPT_TTYPE: | |
1269 | if ((subbuffer[1]&0xff) != TELQUAL_SEND) { | |
1270 | ; | |
1271 | } else { | |
1272 | char *name; | |
1273 | char namebuf[41]; | |
1274 | extern char *getenv(); | |
1275 | int len; | |
1276 | ||
1277 | #if defined(TN3270) | |
1278 | /* | |
0d3c45d4 | 1279 | * Try to send a 3270 type terminal name. Decide which one based |
3e91ea2a GM |
1280 | * on the format of our screen, and (in the future) color |
1281 | * capaiblities. | |
1282 | */ | |
1283 | if ((initscr() != ERR) && /* Initialize curses to get line size */ | |
1284 | (LINES >= 24) && (COLS >= 80)) { | |
1285 | Sent3270TerminalType = 1; | |
1286 | if ((LINES >= 27) && (COLS >= 132)) { | |
1287 | MaxNumberLines = 27; | |
1288 | MaxNumberColumns = 132; | |
1289 | sb_terminal[SBTERMMODEL] = '5'; | |
1290 | } else if (LINES >= 43) { | |
1291 | MaxNumberLines = 43; | |
1292 | MaxNumberColumns = 80; | |
1293 | sb_terminal[SBTERMMODEL] = '4'; | |
1294 | } else if (LINES >= 32) { | |
1295 | MaxNumberLines = 32; | |
1296 | MaxNumberColumns = 80; | |
1297 | sb_terminal[SBTERMMODEL] = '3'; | |
1298 | } else { | |
1299 | MaxNumberLines = 24; | |
1300 | MaxNumberColumns = 80; | |
1301 | sb_terminal[SBTERMMODEL] = '2'; | |
1302 | } | |
1303 | NumberLines = 24; /* before we start out... */ | |
1304 | NumberColumns = 80; | |
1305 | ScreenSize = NumberLines*NumberColumns; | |
1306 | if ((MaxNumberLines*MaxNumberColumns) > MAXSCREENSIZE) { | |
1307 | ExitString(stderr, | |
1308 | "Programming error: MAXSCREENSIZE too small.\n", 1); | |
1309 | /*NOTREACHED*/ | |
1310 | } | |
1311 | bcopy(sb_terminal, nfrontp, sizeof sb_terminal); | |
1312 | printsub(">", nfrontp+2, sizeof sb_terminal-2); | |
1313 | nfrontp += sizeof sb_terminal; | |
1314 | return; | |
1315 | } | |
1316 | #endif /* defined(TN3270) */ | |
1317 | ||
1318 | name = getenv("TERM"); | |
1319 | if ((name == 0) || ((len = strlen(name)) > 40)) { | |
1320 | name = "UNKNOWN"; | |
1321 | } | |
1322 | if ((len + 4+2) < NETROOM()) { | |
1323 | strcpy(namebuf, name); | |
1324 | upcase(namebuf); | |
1325 | sprintf(nfrontp, "%c%c%c%c%s%c%c", IAC, SB, TELOPT_TTYPE, | |
1326 | TELQUAL_IS, namebuf, IAC, SE); | |
1327 | printsub(">", nfrontp+2, 4+strlen(namebuf)+2-2-2); | |
1328 | nfrontp += 4+strlen(namebuf)+2; | |
1329 | } else { | |
1330 | ExitString(stderr, "No room in buffer for terminal type.\n", | |
1331 | 1); | |
1332 | /*NOTREACHED*/ | |
1333 | } | |
1334 | } | |
1335 | ||
1336 | default: | |
1337 | break; | |
1338 | } | |
1339 | } | |
1340 | ||
1341 | #if defined(TN3270) | |
1342 | static void | |
1343 | SetIn3270() | |
1344 | { | |
1345 | if (Sent3270TerminalType && myopts[TELOPT_BINARY] | |
1346 | && hisopts[TELOPT_BINARY]) { | |
1347 | if (!In3270) { | |
1348 | In3270 = 1; | |
0d3c45d4 | 1349 | Init3270(); /* Initialize 3270 functions */ |
3e91ea2a | 1350 | /* initialize terminal key mapping */ |
0d3c45d4 | 1351 | InitTerminal(); /* Start terminal going */ |
3e91ea2a GM |
1352 | setconnmode(); |
1353 | } | |
1354 | } else { | |
1355 | if (In3270) { | |
1356 | StopScreen(1); | |
1357 | In3270 = 0; | |
1358 | setconnmode(); | |
1359 | } | |
1360 | } | |
1361 | } | |
1362 | #endif /* defined(TN3270) */ | |
1363 | \f | |
3e91ea2a GM |
1364 | |
1365 | static void | |
1366 | telrcv() | |
1367 | { | |
1368 | register int c; | |
04b5f59e | 1369 | static int telrcv_state = TS_DATA; |
3e91ea2a GM |
1370 | # if defined(TN3270) |
1371 | register int Scc; | |
1372 | register char *Sbp; | |
1373 | # endif /* defined(TN3270) */ | |
1374 | ||
1375 | while ((scc > 0) && (TTYROOM() > 2)) { | |
1376 | c = *sbp++ & 0xff, scc--; | |
04b5f59e | 1377 | switch (telrcv_state) { |
3e91ea2a GM |
1378 | |
1379 | case TS_CR: | |
04b5f59e | 1380 | telrcv_state = TS_DATA; |
3e91ea2a GM |
1381 | if (c == '\0') { |
1382 | break; /* Ignore \0 after CR */ | |
1383 | } else if (c == '\n') { | |
1384 | if (hisopts[TELOPT_ECHO] && !crmod) { | |
1385 | TTYADD(c); | |
1386 | } | |
1387 | break; | |
1388 | } | |
1389 | /* Else, fall through */ | |
1390 | ||
1391 | case TS_DATA: | |
1392 | if (c == IAC) { | |
04b5f59e | 1393 | telrcv_state = TS_IAC; |
3e91ea2a GM |
1394 | continue; |
1395 | } | |
1396 | # if defined(TN3270) | |
1397 | if (In3270) { | |
1398 | *Ifrontp++ = c; | |
1399 | Sbp = sbp; | |
1400 | Scc = scc; | |
1401 | while (Scc > 0) { | |
1402 | c = *Sbp++ & 0377, Scc--; | |
1403 | if (c == IAC) { | |
04b5f59e | 1404 | telrcv_state = TS_IAC; |
3e91ea2a GM |
1405 | break; |
1406 | } | |
1407 | *Ifrontp++ = c; | |
1408 | } | |
1409 | sbp = Sbp; | |
1410 | scc = Scc; | |
1411 | } else | |
1412 | # endif /* defined(TN3270) */ | |
1413 | /* | |
1414 | * The 'crmod' hack (see following) is needed | |
1415 | * since we can't * set CRMOD on output only. | |
1416 | * Machines like MULTICS like to send \r without | |
1417 | * \n; since we must turn off CRMOD to get proper | |
1418 | * input, the mapping is done here (sigh). | |
1419 | */ | |
1420 | if (c == '\r') { | |
1421 | if (scc > 0) { | |
1422 | c = *sbp&0xff; | |
1423 | if (c == 0) { | |
1424 | sbp++, scc--; | |
1425 | /* a "true" CR */ | |
1426 | TTYADD('\r'); | |
1427 | } else if (!hisopts[TELOPT_ECHO] && | |
1428 | (c == '\n')) { | |
1429 | sbp++, scc--; | |
1430 | TTYADD('\n'); | |
1431 | } else { | |
1432 | TTYADD('\r'); | |
1433 | if (crmod) { | |
1434 | TTYADD('\n'); | |
1435 | } | |
1436 | } | |
1437 | } else { | |
04b5f59e | 1438 | telrcv_state = TS_CR; |
3e91ea2a GM |
1439 | TTYADD('\r'); |
1440 | if (crmod) { | |
1441 | TTYADD('\n'); | |
1442 | } | |
1443 | } | |
1444 | } else { | |
1445 | TTYADD(c); | |
1446 | } | |
1447 | continue; | |
1448 | ||
1449 | case TS_IAC: | |
1450 | switch (c) { | |
1451 | ||
1452 | case WILL: | |
04b5f59e | 1453 | telrcv_state = TS_WILL; |
3e91ea2a GM |
1454 | continue; |
1455 | ||
1456 | case WONT: | |
04b5f59e | 1457 | telrcv_state = TS_WONT; |
3e91ea2a GM |
1458 | continue; |
1459 | ||
1460 | case DO: | |
04b5f59e | 1461 | telrcv_state = TS_DO; |
3e91ea2a GM |
1462 | continue; |
1463 | ||
1464 | case DONT: | |
04b5f59e | 1465 | telrcv_state = TS_DONT; |
3e91ea2a GM |
1466 | continue; |
1467 | ||
1468 | case DM: | |
1469 | /* | |
1470 | * We may have missed an urgent notification, | |
1471 | * so make sure we flush whatever is in the | |
1472 | * buffer currently. | |
1473 | */ | |
1474 | SYNCHing = 1; | |
1475 | ttyflush(); | |
1476 | SYNCHing = stilloob(net); | |
1477 | settimer(gotDM); | |
1478 | break; | |
1479 | ||
1480 | case NOP: | |
1481 | case GA: | |
1482 | break; | |
1483 | ||
1484 | case SB: | |
1485 | SB_CLEAR(); | |
04b5f59e | 1486 | telrcv_state = TS_SB; |
3e91ea2a GM |
1487 | continue; |
1488 | ||
1489 | # if defined(TN3270) | |
1490 | case EOR: | |
1491 | if (In3270) { | |
1492 | Ibackp += DataFromNetwork(Ibackp, Ifrontp-Ibackp, 1); | |
1493 | if (Ibackp == Ifrontp) { | |
1494 | Ibackp = Ifrontp = Ibuf; | |
1495 | ISend = 0; /* should have been! */ | |
1496 | } else { | |
1497 | ISend = 1; | |
1498 | } | |
1499 | } | |
1500 | break; | |
1501 | # endif /* defined(TN3270) */ | |
1502 | ||
1503 | case IAC: | |
1504 | # if !defined(TN3270) | |
1505 | TTYADD(IAC); | |
1506 | # else /* !defined(TN3270) */ | |
1507 | if (In3270) { | |
1508 | *Ifrontp++ = IAC; | |
1509 | } else { | |
1510 | TTYADD(IAC); | |
1511 | } | |
1512 | # endif /* !defined(TN3270) */ | |
1513 | break; | |
1514 | ||
1515 | default: | |
1516 | break; | |
1517 | } | |
04b5f59e | 1518 | telrcv_state = TS_DATA; |
3e91ea2a GM |
1519 | continue; |
1520 | ||
1521 | case TS_WILL: | |
1522 | printoption(">RCVD", will, c, !hisopts[c]); | |
1523 | if (c == TELOPT_TM) { | |
1524 | if (flushout) { | |
1525 | flushout = 0; | |
1526 | } | |
1527 | } else if (!hisopts[c]) { | |
1528 | willoption(c, 1); | |
1529 | } | |
1530 | SetIn3270(); | |
04b5f59e | 1531 | telrcv_state = TS_DATA; |
3e91ea2a GM |
1532 | continue; |
1533 | ||
1534 | case TS_WONT: | |
1535 | printoption(">RCVD", wont, c, hisopts[c]); | |
1536 | if (c == TELOPT_TM) { | |
1537 | if (flushout) { | |
1538 | flushout = 0; | |
1539 | } | |
1540 | } else if (hisopts[c]) { | |
1541 | wontoption(c, 1); | |
1542 | } | |
1543 | SetIn3270(); | |
04b5f59e | 1544 | telrcv_state = TS_DATA; |
3e91ea2a GM |
1545 | continue; |
1546 | ||
1547 | case TS_DO: | |
1548 | printoption(">RCVD", doopt, c, !myopts[c]); | |
1549 | if (!myopts[c]) | |
1550 | dooption(c); | |
1551 | SetIn3270(); | |
04b5f59e | 1552 | telrcv_state = TS_DATA; |
3e91ea2a GM |
1553 | continue; |
1554 | ||
1555 | case TS_DONT: | |
1556 | printoption(">RCVD", dont, c, myopts[c]); | |
1557 | if (myopts[c]) { | |
1558 | myopts[c] = 0; | |
1559 | sprintf(nfrontp, wont, c); | |
1560 | nfrontp += sizeof (wont) - 2; | |
1561 | flushline = 1; | |
1562 | setconnmode(); /* set new tty mode (maybe) */ | |
1563 | printoption(">SENT", wont, c, 0); | |
1564 | } | |
1565 | SetIn3270(); | |
04b5f59e | 1566 | telrcv_state = TS_DATA; |
3e91ea2a GM |
1567 | continue; |
1568 | ||
1569 | case TS_SB: | |
1570 | if (c == IAC) { | |
04b5f59e | 1571 | telrcv_state = TS_SE; |
3e91ea2a GM |
1572 | } else { |
1573 | SB_ACCUM(c); | |
1574 | } | |
1575 | continue; | |
1576 | ||
1577 | case TS_SE: | |
1578 | if (c != SE) { | |
1579 | if (c != IAC) { | |
1580 | SB_ACCUM(IAC); | |
1581 | } | |
1582 | SB_ACCUM(c); | |
04b5f59e | 1583 | telrcv_state = TS_SB; |
3e91ea2a GM |
1584 | } else { |
1585 | SB_TERM(); | |
1586 | suboption(); /* handle sub-option */ | |
1587 | SetIn3270(); | |
04b5f59e | 1588 | telrcv_state = TS_DATA; |
3e91ea2a GM |
1589 | } |
1590 | } | |
1591 | } | |
1592 | } | |
1593 | \f | |
1594 | #if defined(TN3270) | |
1595 | ||
1596 | /* | |
1597 | * The following routines are places where the various tn3270 | |
1598 | * routines make calls into telnet.c. | |
1599 | */ | |
1600 | ||
1601 | /* TtyChars() - returns the number of characters in the TTY buffer */ | |
1602 | TtyChars() | |
1603 | { | |
1604 | return(tfrontp-tbackp); | |
1605 | } | |
1606 | ||
1607 | /* | |
1608 | * DataToNetwork - queue up some data to go to network. If "done" is set, | |
1609 | * then when last byte is queued, we add on an IAC EOR sequence (so, | |
1610 | * don't call us with "done" until you want that done...) | |
1611 | * | |
1612 | * We actually do send all the data to the network buffer, since our | |
1613 | * only client needs for us to do that. | |
1614 | */ | |
1615 | ||
1616 | int | |
1617 | DataToNetwork(buffer, count, done) | |
1618 | register char *buffer; /* where the data is */ | |
1619 | register int count; /* how much to send */ | |
1620 | int done; /* is this the last of a logical block */ | |
1621 | { | |
1622 | register int c; | |
1623 | int origCount; | |
1624 | fd_set o; | |
1625 | ||
1626 | origCount = count; | |
1627 | FD_ZERO(&o); | |
1628 | ||
1629 | while (count) { | |
1630 | if ((netobuf+sizeof netobuf - nfrontp) < 6) { | |
1631 | netflush(); | |
1632 | while ((netobuf+sizeof netobuf - nfrontp) < 6) { | |
1633 | FD_SET(net, &o); | |
1634 | (void) select(net+1, (fd_set *) 0, &o, (fd_set *) 0, | |
1635 | (struct timeval *) 0); | |
1636 | netflush(); | |
1637 | } | |
1638 | } | |
1639 | c = *buffer++; | |
1640 | count--; | |
1641 | if (c == IAC) { | |
1642 | *nfrontp++ = IAC; | |
1643 | *nfrontp++ = IAC; | |
1644 | } else { | |
1645 | *nfrontp++ = c; | |
1646 | } | |
1647 | } | |
1648 | ||
1649 | if (done && !count) { | |
1650 | *nfrontp++ = IAC; | |
1651 | *nfrontp++ = EOR; | |
1652 | netflush(); /* try to move along as quickly as ... */ | |
1653 | } | |
1654 | return(origCount - count); | |
1655 | } | |
1656 | ||
1657 | /* DataToTerminal - queue up some data to go to terminal. */ | |
1658 | ||
1659 | int | |
1660 | DataToTerminal(buffer, count) | |
1661 | register char *buffer; /* where the data is */ | |
1662 | register int count; /* how much to send */ | |
1663 | { | |
1664 | int origCount; | |
1665 | fd_set o; | |
1666 | ||
1667 | origCount = count; | |
1668 | FD_ZERO(&o); | |
1669 | ||
1670 | while (count) { | |
1671 | if (tfrontp >= ttyobuf+sizeof ttyobuf) { | |
1672 | ttyflush(); | |
1673 | while (tfrontp >= ttyobuf+sizeof ttyobuf) { | |
1674 | FD_SET(tout, &o); | |
1675 | (void) select(tout+1, (fd_set *) 0, &o, (fd_set *) 0, | |
1676 | (struct timeval *) 0); | |
1677 | ttyflush(); | |
1678 | } | |
1679 | } | |
1680 | *tfrontp++ = *buffer++; | |
1681 | count--; | |
1682 | } | |
1683 | return(origCount - count); | |
1684 | } | |
1685 | ||
1686 | /* EmptyTerminal - called to make sure that the terminal buffer is empty. | |
1687 | * Note that we consider the buffer to run all the | |
1688 | * way to the kernel (thus the select). | |
1689 | */ | |
1690 | ||
1691 | void | |
1692 | EmptyTerminal() | |
1693 | { | |
1694 | fd_set o; | |
1695 | ||
1696 | FD_ZERO(&o); | |
1697 | ||
1698 | if (tfrontp == tbackp) { | |
1699 | FD_SET(tout, &o); | |
1700 | (void) select(tout+1, (int *) 0, &o, (int *) 0, | |
1701 | (struct timeval *) 0); /* wait for TTLOWAT */ | |
1702 | } else { | |
1703 | while (tfrontp != tbackp) { | |
1704 | ttyflush(); | |
1705 | FD_SET(tout, &o); | |
1706 | (void) select(tout+1, (int *) 0, &o, (int *) 0, | |
1707 | (struct timeval *) 0); /* wait for TTLOWAT */ | |
1708 | } | |
1709 | } | |
1710 | } | |
1711 | ||
1712 | /* | |
1713 | * Push3270 - Try to send data along the 3270 output (to screen) direction. | |
1714 | */ | |
1715 | ||
1716 | static int | |
1717 | Push3270() | |
1718 | { | |
1719 | int save = scc; | |
1720 | ||
1721 | if (scc) { | |
1722 | if (Ifrontp+scc > Ibuf+sizeof Ibuf) { | |
1723 | if (Ibackp != Ibuf) { | |
1724 | bcopy(Ibackp, Ibuf, Ifrontp-Ibackp); | |
1725 | Ifrontp -= (Ibackp-Ibuf); | |
1726 | Ibackp = Ibuf; | |
1727 | } | |
1728 | } | |
1729 | if (Ifrontp+scc < Ibuf+sizeof Ibuf) { | |
1730 | telrcv(); | |
1731 | } | |
1732 | } | |
1733 | return save != scc; | |
1734 | } | |
1735 | ||
1736 | ||
1737 | /* | |
1738 | * Finish3270 - get the last dregs of 3270 data out to the terminal | |
1739 | * before quitting. | |
1740 | */ | |
1741 | ||
1742 | static void | |
1743 | Finish3270() | |
1744 | { | |
1745 | while (Push3270() || !DoTerminalOutput()) { | |
1746 | ; | |
1747 | } | |
1748 | } | |
1749 | ||
1750 | ||
1751 | ||
1752 | /* StringToTerminal - output a null terminated string to the terminal */ | |
1753 | ||
1754 | void | |
1755 | StringToTerminal(s) | |
1756 | char *s; | |
1757 | { | |
1758 | int count; | |
1759 | ||
1760 | count = strlen(s); | |
1761 | if (count) { | |
1762 | (void) DataToTerminal(s, count); /* we know it always goes... */ | |
1763 | } | |
1764 | } | |
1765 | ||
1766 | ||
1767 | #if defined(TN3270) && ((!defined(NOT43)) || defined(PUTCHAR)) | |
1768 | /* _putchar - output a single character to the terminal. This name is so that | |
1769 | * curses(3x) can call us to send out data. | |
1770 | */ | |
1771 | ||
1772 | void | |
1773 | _putchar(c) | |
1774 | char c; | |
1775 | { | |
1776 | if (tfrontp >= ttyobuf+sizeof ttyobuf) { | |
1777 | (void) DataToTerminal(&c, 1); | |
1778 | } else { | |
1779 | *tfrontp++ = c; /* optimize if possible. */ | |
1780 | } | |
1781 | } | |
1782 | #endif /* defined(TN3270) && ((!defined(NOT43)) || defined(PUTCHAR)) */ | |
1783 | \f | |
1784 | static void | |
1785 | SetForExit() | |
1786 | { | |
1787 | setconnmode(); | |
1788 | if (In3270) { | |
1789 | Finish3270(); | |
1790 | } | |
1791 | setcommandmode(); | |
1792 | fflush(stdout); | |
1793 | fflush(stderr); | |
1794 | if (In3270) { | |
1795 | StopScreen(1); | |
1796 | } | |
1797 | setconnmode(); | |
1798 | setcommandmode(); | |
1799 | } | |
1800 | ||
1801 | static void | |
1802 | Exit(returnCode) | |
1803 | int returnCode; | |
1804 | { | |
1805 | SetForExit(); | |
1806 | exit(returnCode); | |
1807 | } | |
1808 | ||
1809 | void | |
1810 | ExitString(file, string, returnCode) | |
1811 | FILE *file; | |
1812 | char *string; | |
1813 | int returnCode; | |
1814 | { | |
1815 | SetForExit(); | |
1816 | fwrite(string, 1, strlen(string), file); | |
1817 | exit(returnCode); | |
1818 | } | |
1819 | ||
1820 | void | |
1821 | ExitPerror(string, returnCode) | |
1822 | char *string; | |
1823 | int returnCode; | |
1824 | { | |
1825 | SetForExit(); | |
1826 | perror(string); | |
1827 | exit(returnCode); | |
1828 | } | |
1829 | ||
1830 | #endif /* defined(TN3270) */ | |
1831 | \f | |
1832 | static | |
1833 | Scheduler(block) | |
1834 | int block; /* should we block in the select ? */ | |
1835 | { | |
1836 | register int c; | |
1837 | /* One wants to be a bit careful about setting returnValue | |
1838 | * to one, since a one implies we did some useful work, | |
1839 | * and therefore probably won't be called to block next | |
1840 | * time (TN3270 mode only). | |
1841 | */ | |
1842 | int returnValue = 0; | |
1843 | static struct timeval TimeValue = { 0 }; | |
1844 | ||
1845 | if (scc < 0 && tcc < 0) { | |
1846 | return -1; | |
1847 | } | |
1848 | ||
1849 | if ((!MODE_LINE(globalmode) || flushline) && NETBYTES()) { | |
1850 | FD_SET(net, &obits); | |
1851 | } | |
1852 | if (TTYBYTES()) { | |
1853 | FD_SET(tout, &obits); | |
1854 | } | |
1855 | if ((tcc == 0) && NETROOM()) { | |
1856 | FD_SET(tin, &ibits); | |
1857 | } | |
1858 | # if !defined(TN3270) | |
1859 | if (TTYROOM()) { | |
1860 | FD_SET(net, &ibits); | |
1861 | } | |
1862 | # else /* !defined(TN3270) */ | |
1863 | if (!ISend && TTYROOM()) { | |
1864 | FD_SET(net, &ibits); | |
1865 | } | |
1866 | # endif /* !defined(TN3270) */ | |
1867 | if (!SYNCHing) { | |
1868 | FD_SET(net, &xbits); | |
1869 | } | |
1870 | # if defined(TN3270) && defined(unix) | |
1871 | if (HaveInput) { | |
1872 | HaveInput = 0; | |
1873 | signal(SIGIO, inputAvailable); | |
1874 | } | |
1875 | #endif /* defined(TN3270) && defined(unix) */ | |
1876 | if ((c = select(16, &ibits, &obits, &xbits, | |
1877 | block? (struct timeval *)0 : &TimeValue)) < 1) { | |
1878 | if (c == -1) { | |
1879 | /* | |
1880 | * we can get EINTR if we are in line mode, | |
1881 | * and the user does an escape (TSTP), or | |
1882 | * some other signal generator. | |
1883 | */ | |
1884 | if (errno == EINTR) { | |
1885 | return 0; | |
1886 | } | |
1887 | # if defined(TN3270) | |
1888 | /* | |
1889 | * we can get EBADF if we were in transparent | |
1890 | * mode, and the transcom process died. | |
1891 | */ | |
1892 | if (errno == EBADF) { | |
1893 | /* | |
1894 | * zero the bits (even though kernel does it) | |
1895 | * to make sure we are selecting on the right | |
1896 | * ones. | |
1897 | */ | |
1898 | FD_ZERO(&ibits); | |
1899 | FD_ZERO(&obits); | |
1900 | FD_ZERO(&xbits); | |
1901 | return 0; | |
1902 | } | |
1903 | # endif /* defined(TN3270) */ | |
1904 | /* I don't like this, does it ever happen? */ | |
1905 | printf("sleep(5) from telnet, after select\r\n"); | |
1906 | #if defined(unix) | |
1907 | sleep(5); | |
1908 | #endif /* defined(unix) */ | |
1909 | } | |
1910 | return 0; | |
1911 | } | |
1912 | ||
1913 | /* | |
1914 | * Any urgent data? | |
1915 | */ | |
1916 | if (FD_ISSET(net, &xbits)) { | |
1917 | FD_CLR(net, &xbits); | |
1918 | SYNCHing = 1; | |
1919 | ttyflush(); /* flush already enqueued data */ | |
1920 | } | |
1921 | ||
1922 | /* | |
1923 | * Something to read from the network... | |
1924 | */ | |
1925 | if (FD_ISSET(net, &ibits)) { | |
1926 | int canread; | |
1927 | ||
1928 | FD_CLR(net, &ibits); | |
1929 | if (scc == 0) { | |
1930 | sbp = sibuf; | |
1931 | } | |
9c96a9cd | 1932 | canread = sibuf + sizeof sibuf - (sbp+scc); |
3e91ea2a GM |
1933 | #if !defined(SO_OOBINLINE) |
1934 | /* | |
1935 | * In 4.2 (and some early 4.3) systems, the | |
1936 | * OOB indication and data handling in the kernel | |
1937 | * is such that if two separate TCP Urgent requests | |
1938 | * come in, one byte of TCP data will be overlaid. | |
1939 | * This is fatal for Telnet, but we try to live | |
1940 | * with it. | |
1941 | * | |
1942 | * In addition, in 4.2 (and...), a special protocol | |
1943 | * is needed to pick up the TCP Urgent data in | |
1944 | * the correct sequence. | |
1945 | * | |
1946 | * What we do is: if we think we are in urgent | |
1947 | * mode, we look to see if we are "at the mark". | |
1948 | * If we are, we do an OOB receive. If we run | |
1949 | * this twice, we will do the OOB receive twice, | |
1950 | * but the second will fail, since the second | |
1951 | * time we were "at the mark", but there wasn't | |
1952 | * any data there (the kernel doesn't reset | |
1953 | * "at the mark" until we do a normal read). | |
1954 | * Once we've read the OOB data, we go ahead | |
1955 | * and do normal reads. | |
1956 | * | |
1957 | * There is also another problem, which is that | |
1958 | * since the OOB byte we read doesn't put us | |
1959 | * out of OOB state, and since that byte is most | |
1960 | * likely the TELNET DM (data mark), we would | |
1961 | * stay in the TELNET SYNCH (SYNCHing) state. | |
1962 | * So, clocks to the rescue. If we've "just" | |
1963 | * received a DM, then we test for the | |
1964 | * presence of OOB data when the receive OOB | |
1965 | * fails (and AFTER we did the normal mode read | |
1966 | * to clear "at the mark"). | |
1967 | */ | |
1968 | if (SYNCHing) { | |
1969 | int atmark; | |
1970 | ||
1971 | ioctl(net, SIOCATMARK, (char *)&atmark); | |
1972 | if (atmark) { | |
9c96a9cd | 1973 | c = recv(net, sbp+scc, canread, MSG_OOB); |
3e91ea2a | 1974 | if ((c == -1) && (errno == EINVAL)) { |
9c96a9cd | 1975 | c = read(net, sbp+scc, canread); |
3e91ea2a GM |
1976 | if (clocks.didnetreceive < clocks.gotDM) { |
1977 | SYNCHing = stilloob(net); | |
1978 | } | |
1979 | } | |
1980 | } else { | |
9c96a9cd | 1981 | c = read(net, sbp+scc, canread); |
3e91ea2a GM |
1982 | } |
1983 | } else { | |
9c96a9cd | 1984 | c = read(net, sbp+scc, canread); |
3e91ea2a GM |
1985 | } |
1986 | settimer(didnetreceive); | |
1987 | #else /* !defined(SO_OOBINLINE) */ | |
9c96a9cd | 1988 | c = read(net, sbp+scc, canread); |
3e91ea2a GM |
1989 | #endif /* !defined(SO_OOBINLINE) */ |
1990 | if (c < 0 && errno == EWOULDBLOCK) { | |
1991 | c = 0; | |
1992 | } else if (c <= 0) { | |
1993 | return -1; | |
1994 | } | |
1995 | if (netdata) { | |
9c96a9cd | 1996 | Dump('<', sbp+scc, c); |
3e91ea2a GM |
1997 | } |
1998 | scc += c; | |
1999 | returnValue = 1; | |
2000 | } | |
2001 | ||
2002 | /* | |
2003 | * Something to read from the tty... | |
2004 | */ | |
2005 | if (FD_ISSET(tin, &ibits)) { | |
2006 | FD_CLR(tin, &ibits); | |
2007 | if (tcc == 0) { | |
2008 | tbp = tibuf; /* nothing left, reset */ | |
2009 | } | |
2010 | c = read(tin, tbp, tibuf+sizeof tibuf - tbp); | |
2011 | if (c < 0 && errno == EWOULDBLOCK) { | |
2012 | c = 0; | |
2013 | } else { | |
2014 | /* EOF detection for line mode!!!! */ | |
2015 | if (c == 0 && MODE_LOCAL_CHARS(globalmode)) { | |
2016 | /* must be an EOF... */ | |
2017 | *tbp = ntc.t_eofc; | |
2018 | c = 1; | |
2019 | } | |
2020 | if (c <= 0) { | |
2021 | tcc = c; | |
2022 | return -1; | |
2023 | } | |
2024 | } | |
2025 | tcc += c; | |
2026 | returnValue = 1; /* did something useful */ | |
2027 | } | |
2028 | ||
2029 | # if defined(TN3270) | |
2030 | if (tcc > 0) { | |
2031 | if (In3270) { | |
2032 | c = DataFromTerminal(tbp, tcc); | |
2033 | if (c) { | |
2034 | returnValue = 1; | |
2035 | } | |
2036 | tcc -= c; | |
2037 | tbp += c; | |
2038 | } else { | |
58f9a26f | 2039 | # endif /* defined(TN3270) */ |
3e91ea2a GM |
2040 | returnValue = 1; |
2041 | while (tcc > 0) { | |
2042 | register int sc; | |
2043 | ||
2044 | if (NETROOM() < 2) { | |
2045 | flushline = 1; | |
2046 | break; | |
2047 | } | |
2048 | c = *tbp++ & 0xff, sc = strip(c), tcc--; | |
2049 | if (sc == escape) { | |
2050 | command(0); | |
2051 | tcc = 0; | |
2052 | flushline = 1; | |
2053 | break; | |
2054 | } else if (MODE_LINE(globalmode) && (sc == echoc)) { | |
2055 | if (tcc > 0 && strip(*tbp) == echoc) { | |
2056 | tbp++; | |
2057 | tcc--; | |
2058 | } else { | |
2059 | dontlecho = !dontlecho; | |
2060 | settimer(echotoggle); | |
2061 | setconnmode(); | |
2062 | tcc = 0; | |
2063 | flushline = 1; | |
2064 | break; | |
2065 | } | |
2066 | } | |
2067 | if (localchars) { | |
2068 | if (sc == ntc.t_intrc) { | |
2069 | intp(); | |
2070 | break; | |
2071 | } else if (sc == ntc.t_quitc) { | |
2072 | sendbrk(); | |
2073 | break; | |
2074 | } else if (sc == nltc.t_flushc) { | |
2075 | NET2ADD(IAC, AO); | |
2076 | if (autoflush) { | |
2077 | doflush(); | |
2078 | } | |
2079 | break; | |
2080 | } else if (MODE_LOCAL_CHARS(globalmode)) { | |
2081 | ; | |
2082 | } else if (sc == nttyb.sg_kill) { | |
2083 | NET2ADD(IAC, EL); | |
2084 | break; | |
2085 | } else if (sc == nttyb.sg_erase) { | |
2086 | NET2ADD(IAC, EC); | |
2087 | break; | |
2088 | } | |
2089 | } | |
2090 | switch (c) { | |
2091 | case '\n': | |
2092 | /* | |
2093 | * If we are in CRMOD mode (\r ==> \n) | |
2094 | * on our local machine, then probably | |
2095 | * a newline (unix) is CRLF (TELNET). | |
2096 | */ | |
2097 | if (MODE_LOCAL_CHARS(globalmode)) { | |
2098 | NETADD('\r'); | |
2099 | } | |
2100 | NETADD('\n'); | |
2101 | flushline = 1; | |
2102 | break; | |
2103 | case '\r': | |
2104 | NET2ADD('\r', '\0'); | |
2105 | flushline = 1; | |
2106 | break; | |
2107 | case IAC: | |
2108 | NET2ADD(IAC, IAC); | |
2109 | break; | |
2110 | default: | |
2111 | NETADD(c); | |
2112 | break; | |
2113 | } | |
2114 | } | |
2115 | # if defined(TN3270) | |
2116 | } | |
2117 | } | |
2118 | # endif /* defined(TN3270) */ | |
2119 | ||
2120 | if ((!MODE_LINE(globalmode) || flushline) && | |
2121 | FD_ISSET(net, &obits) && (NETBYTES() > 0)) { | |
2122 | FD_CLR(net, &obits); | |
2123 | returnValue = netflush(); | |
2124 | } | |
2125 | if (scc > 0) { | |
2126 | # if !defined(TN3270) | |
2127 | telrcv(); | |
2128 | returnValue = 1; | |
2129 | # else /* !defined(TN3270) */ | |
2130 | returnValue = Push3270(); | |
2131 | # endif /* !defined(TN3270) */ | |
2132 | } | |
2133 | if (FD_ISSET(tout, &obits) && (TTYBYTES() > 0)) { | |
2134 | FD_CLR(tout, &obits); | |
2135 | returnValue = ttyflush(); | |
2136 | } | |
2137 | return returnValue; | |
2138 | } | |
2139 | \f | |
2140 | /* | |
2141 | * Select from tty and network... | |
2142 | */ | |
2143 | static void | |
2144 | telnet() | |
2145 | { | |
2146 | int on = 1; | |
2147 | #if defined(TN3270) && defined(unix) | |
2148 | int myPid; | |
2149 | #endif /* defined(TN3270) */ | |
2150 | ||
2151 | tout = fileno(stdout); | |
2152 | tin = fileno(stdin); | |
2153 | setconnmode(); | |
2154 | scc = 0; | |
2155 | tcc = 0; | |
2156 | FD_ZERO(&ibits); | |
2157 | FD_ZERO(&obits); | |
2158 | FD_ZERO(&xbits); | |
2159 | ||
2160 | ioctl(net, FIONBIO, (char *)&on); | |
2161 | ||
2162 | #if defined(TN3270) | |
2163 | #if !defined(DEBUG) /* DBX can't handle! */ | |
2164 | ioctl(net, FIOASYNC, (char *)&on); /* hear about input */ | |
2165 | #endif /* !defined(DEBUG) */ | |
2166 | ||
2167 | #if defined(unix) | |
2168 | myPid = getpid(); | |
2169 | #if defined(NOT43) | |
2170 | myPid = -myPid; | |
2171 | #endif /* defined(NOT43) */ | |
2172 | ioctl(net, SIOCSPGRP, (char *)&myPid); /* set my pid */ | |
2173 | #endif /* defined(unix) */ | |
2174 | ||
2175 | #endif /* defined(TN3270) */ | |
2176 | ||
2177 | #if defined(SO_OOBINLINE) | |
2178 | setsockopt(net, SOL_SOCKET, SO_OOBINLINE, &on, sizeof on); | |
2179 | #endif /* defined(SO_OOBINLINE) */ | |
2180 | ||
58f9a26f | 2181 | # if !defined(TN3270) |
3e91ea2a GM |
2182 | if (telnetport) { |
2183 | if (!hisopts[TELOPT_SGA]) { | |
2184 | willoption(TELOPT_SGA, 0); | |
2185 | } | |
3e91ea2a GM |
2186 | if (!myopts[TELOPT_TTYPE]) { |
2187 | dooption(TELOPT_TTYPE, 0); | |
2188 | } | |
3e91ea2a | 2189 | } |
58f9a26f | 2190 | # endif /* !defined(TN3270) */ |
3e91ea2a GM |
2191 | |
2192 | # if !defined(TN3270) | |
2193 | for (;;) { | |
2194 | if (Scheduler(1) == -1) { | |
2195 | setcommandmode(); | |
2196 | return; | |
2197 | } | |
2198 | } | |
2199 | # else /* !defined(TN3270) */ | |
2200 | for (;;) { | |
2201 | int schedValue; | |
2202 | ||
2203 | while (!In3270) { | |
2204 | if (Scheduler(1) == -1) { | |
2205 | setcommandmode(); | |
2206 | return; | |
2207 | } | |
2208 | } | |
2209 | ||
2210 | while ((schedValue = Scheduler(0)) != 0) { | |
2211 | if (schedValue == -1) { | |
2212 | setcommandmode(); | |
2213 | return; | |
2214 | } | |
2215 | } | |
2216 | /* If there is data waiting to go out to terminal, don't | |
2217 | * schedule any more data for the terminal. | |
2218 | */ | |
2219 | if (tfrontp-tbackp) { | |
2220 | schedValue = 1; | |
2221 | } else { | |
2222 | schedValue = DoTerminalOutput(); | |
2223 | } | |
2224 | if (schedValue) { | |
2225 | if (Scheduler(1) == -1) { | |
2226 | setcommandmode(); | |
2227 | return; | |
2228 | } | |
2229 | } | |
2230 | } | |
2231 | # endif /* !defined(TN3270) */ | |
2232 | } | |
2233 | \f | |
2234 | /* | |
2235 | * The following are data structures and routines for | |
2236 | * the "send" command. | |
2237 | * | |
2238 | */ | |
2239 | ||
2240 | struct sendlist { | |
2241 | char *name; /* How user refers to it (case independent) */ | |
2242 | int what; /* Character to be sent (<0 ==> special) */ | |
2243 | char *help; /* Help information (0 ==> no help) */ | |
2244 | #if defined(NOT43) | |
2245 | int (*routine)(); /* Routine to perform (for special ops) */ | |
2246 | #else /* defined(NOT43) */ | |
2247 | void (*routine)(); /* Routine to perform (for special ops) */ | |
2248 | #endif /* defined(NOT43) */ | |
2249 | }; | |
2250 | \f | |
2251 | #define SENDQUESTION -1 | |
2252 | #define SENDESCAPE -3 | |
2253 | ||
2254 | static struct sendlist Sendlist[] = { | |
2255 | { "ao", AO, "Send Telnet Abort output" }, | |
2256 | { "ayt", AYT, "Send Telnet 'Are You There'" }, | |
2257 | { "brk", BREAK, "Send Telnet Break" }, | |
2258 | { "ec", EC, "Send Telnet Erase Character" }, | |
2259 | { "el", EL, "Send Telnet Erase Line" }, | |
2260 | { "escape", SENDESCAPE, "Send current escape character" }, | |
2261 | { "ga", GA, "Send Telnet 'Go Ahead' sequence" }, | |
2262 | { "ip", IP, "Send Telnet Interrupt Process" }, | |
2263 | { "nop", NOP, "Send Telnet 'No operation'" }, | |
2264 | { "synch", SYNCH, "Perform Telnet 'Synch operation'", dosynch }, | |
2265 | { "?", SENDQUESTION, "Display send options" }, | |
2266 | { 0 } | |
2267 | }; | |
2268 | ||
2269 | static struct sendlist Sendlist2[] = { /* some synonyms */ | |
2270 | { "break", BREAK, 0 }, | |
2271 | ||
2272 | { "intp", IP, 0 }, | |
2273 | { "interrupt", IP, 0 }, | |
2274 | { "intr", IP, 0 }, | |
2275 | ||
2276 | { "help", SENDQUESTION, 0 }, | |
2277 | ||
2278 | { 0 } | |
2279 | }; | |
2280 | ||
2281 | static char ** | |
2282 | getnextsend(name) | |
2283 | char *name; | |
2284 | { | |
2285 | struct sendlist *c = (struct sendlist *) name; | |
2286 | ||
2287 | return (char **) (c+1); | |
2288 | } | |
2289 | ||
2290 | static struct sendlist * | |
2291 | getsend(name) | |
2292 | char *name; | |
2293 | { | |
2294 | struct sendlist *sl; | |
2295 | ||
2296 | if ((sl = (struct sendlist *) | |
2297 | genget(name, (char **) Sendlist, getnextsend)) != 0) { | |
2298 | return sl; | |
2299 | } else { | |
2300 | return (struct sendlist *) | |
2301 | genget(name, (char **) Sendlist2, getnextsend); | |
2302 | } | |
2303 | } | |
2304 | ||
2305 | static | |
2306 | sendcmd(argc, argv) | |
2307 | int argc; | |
2308 | char **argv; | |
2309 | { | |
2310 | int what; /* what we are sending this time */ | |
2311 | int count; /* how many bytes we are going to need to send */ | |
2312 | int i; | |
2313 | int question = 0; /* was at least one argument a question */ | |
2314 | struct sendlist *s; /* pointer to current command */ | |
2315 | ||
2316 | if (argc < 2) { | |
2317 | printf("need at least one argument for 'send' command\n"); | |
2318 | printf("'send ?' for help\n"); | |
2319 | return 0; | |
2320 | } | |
2321 | /* | |
2322 | * First, validate all the send arguments. | |
2323 | * In addition, we see how much space we are going to need, and | |
2324 | * whether or not we will be doing a "SYNCH" operation (which | |
2325 | * flushes the network queue). | |
2326 | */ | |
2327 | count = 0; | |
2328 | for (i = 1; i < argc; i++) { | |
2329 | s = getsend(argv[i]); | |
2330 | if (s == 0) { | |
2331 | printf("Unknown send argument '%s'\n'send ?' for help.\n", | |
2332 | argv[i]); | |
2333 | return 0; | |
2334 | } else if (s == Ambiguous(struct sendlist *)) { | |
2335 | printf("Ambiguous send argument '%s'\n'send ?' for help.\n", | |
2336 | argv[i]); | |
2337 | return 0; | |
2338 | } | |
2339 | switch (s->what) { | |
2340 | case SENDQUESTION: | |
2341 | break; | |
2342 | case SENDESCAPE: | |
2343 | count += 1; | |
2344 | break; | |
2345 | case SYNCH: | |
2346 | count += 2; | |
2347 | break; | |
2348 | default: | |
2349 | count += 2; | |
2350 | break; | |
2351 | } | |
2352 | } | |
2353 | /* Now, do we have enough room? */ | |
2354 | if (NETROOM() < count) { | |
2355 | printf("There is not enough room in the buffer TO the network\n"); | |
2356 | printf("to process your request. Nothing will be done.\n"); | |
2357 | printf("('send synch' will throw away most data in the network\n"); | |
2358 | printf("buffer, if this might help.)\n"); | |
2359 | return 0; | |
2360 | } | |
2361 | /* OK, they are all OK, now go through again and actually send */ | |
2362 | for (i = 1; i < argc; i++) { | |
2363 | if ((s = getsend(argv[i])) == 0) { | |
2364 | fprintf(stderr, "Telnet 'send' error - argument disappeared!\n"); | |
2365 | quit(); | |
2366 | /*NOTREACHED*/ | |
2367 | } | |
2368 | if (s->routine) { | |
2369 | (*s->routine)(s); | |
2370 | } else { | |
2371 | switch (what = s->what) { | |
2372 | case SYNCH: | |
2373 | dosynch(); | |
2374 | break; | |
2375 | case SENDQUESTION: | |
2376 | for (s = Sendlist; s->name; s++) { | |
2377 | if (s->help) { | |
2378 | printf(s->name); | |
2379 | if (s->help) { | |
2380 | printf("\t%s", s->help); | |
2381 | } | |
2382 | printf("\n"); | |
2383 | } | |
2384 | } | |
2385 | question = 1; | |
2386 | break; | |
2387 | case SENDESCAPE: | |
2388 | NETADD(escape); | |
2389 | break; | |
2390 | default: | |
2391 | NET2ADD(IAC, what); | |
2392 | break; | |
2393 | } | |
2394 | } | |
2395 | } | |
2396 | return !question; | |
2397 | } | |
2398 | \f | |
2399 | /* | |
2400 | * The following are the routines and data structures referred | |
2401 | * to by the arguments to the "toggle" command. | |
2402 | */ | |
2403 | ||
2404 | static | |
2405 | lclchars() | |
2406 | { | |
2407 | donelclchars = 1; | |
2408 | return 1; | |
2409 | } | |
2410 | ||
2411 | static | |
2412 | togdebug() | |
2413 | { | |
2414 | #ifndef NOT43 | |
2415 | if (net > 0 && | |
2416 | setsockopt(net, SOL_SOCKET, SO_DEBUG, (char *)&debug, sizeof(debug)) | |
2417 | < 0) { | |
2418 | perror("setsockopt (SO_DEBUG)"); | |
2419 | } | |
58f9a26f | 2420 | #else /* NOT43 */ |
3e91ea2a GM |
2421 | if (debug) { |
2422 | if (net > 0 && setsockopt(net, SOL_SOCKET, SO_DEBUG, 0, 0) < 0) | |
2423 | perror("setsockopt (SO_DEBUG)"); | |
2424 | } else | |
2425 | printf("Cannot turn off socket debugging\n"); | |
58f9a26f | 2426 | #endif /* NOT43 */ |
3e91ea2a GM |
2427 | return 1; |
2428 | } | |
2429 | ||
2430 | ||
2431 | ||
2432 | extern int togglehelp(); | |
2433 | ||
2434 | struct togglelist { | |
2435 | char *name; /* name of toggle */ | |
2436 | char *help; /* help message */ | |
2437 | int (*handler)(); /* routine to do actual setting */ | |
2438 | int dohelp; /* should we display help information */ | |
2439 | int *variable; | |
2440 | char *actionexplanation; | |
2441 | }; | |
2442 | ||
2443 | static struct togglelist Togglelist[] = { | |
2444 | { "autoflush", | |
2445 | "toggle flushing of output when sending interrupt characters", | |
2446 | 0, | |
2447 | 1, | |
2448 | &autoflush, | |
2449 | "flush output when sending interrupt characters" }, | |
2450 | { "autosynch", | |
2451 | "toggle automatic sending of interrupt characters in urgent mode", | |
2452 | 0, | |
2453 | 1, | |
2454 | &autosynch, | |
2455 | "send interrupt characters in urgent mode" }, | |
2456 | { "crmod", | |
2457 | "toggle mapping of received carriage returns", | |
2458 | 0, | |
2459 | 1, | |
2460 | &crmod, | |
2461 | "map carriage return on output" }, | |
2462 | { "localchars", | |
2463 | "toggle local recognition of certain control characters", | |
2464 | lclchars, | |
2465 | 1, | |
2466 | &localchars, | |
2467 | "recognize certain control characters" }, | |
2468 | { " ", "", 0, 1 }, /* empty line */ | |
2469 | { "debug", | |
2470 | "(debugging) toggle debugging", | |
2471 | togdebug, | |
2472 | 1, | |
2473 | &debug, | |
2474 | "turn on socket level debugging" }, | |
2475 | { "netdata", | |
2476 | "(debugging) toggle printing of hexadecimal network data", | |
2477 | 0, | |
2478 | 1, | |
2479 | &netdata, | |
2480 | "print hexadecimal representation of network traffic" }, | |
2481 | { "options", | |
2482 | "(debugging) toggle viewing of options processing", | |
2483 | 0, | |
2484 | 1, | |
2485 | &showoptions, | |
2486 | "show option processing" }, | |
2487 | { " ", "", 0, 1 }, /* empty line */ | |
2488 | { "?", | |
2489 | "display help information", | |
2490 | togglehelp, | |
2491 | 1 }, | |
2492 | { "help", | |
2493 | "display help information", | |
2494 | togglehelp, | |
2495 | 0 }, | |
2496 | { 0 } | |
2497 | }; | |
2498 | ||
2499 | static | |
2500 | togglehelp() | |
2501 | { | |
2502 | struct togglelist *c; | |
2503 | ||
2504 | for (c = Togglelist; c->name; c++) { | |
2505 | if (c->dohelp) { | |
2506 | printf("%s\t%s\n", c->name, c->help); | |
2507 | } | |
2508 | } | |
2509 | return 0; | |
2510 | } | |
2511 | ||
2512 | static char ** | |
2513 | getnexttoggle(name) | |
2514 | char *name; | |
2515 | { | |
2516 | struct togglelist *c = (struct togglelist *) name; | |
2517 | ||
2518 | return (char **) (c+1); | |
2519 | } | |
2520 | ||
2521 | static struct togglelist * | |
2522 | gettoggle(name) | |
2523 | char *name; | |
2524 | { | |
2525 | return (struct togglelist *) | |
2526 | genget(name, (char **) Togglelist, getnexttoggle); | |
2527 | } | |
2528 | ||
2529 | static | |
2530 | toggle(argc, argv) | |
2531 | int argc; | |
2532 | char *argv[]; | |
2533 | { | |
2534 | int retval = 1; | |
2535 | char *name; | |
2536 | struct togglelist *c; | |
2537 | ||
2538 | if (argc < 2) { | |
2539 | fprintf(stderr, | |
2540 | "Need an argument to 'toggle' command. 'toggle ?' for help.\n"); | |
2541 | return 0; | |
2542 | } | |
2543 | argc--; | |
2544 | argv++; | |
2545 | while (argc--) { | |
2546 | name = *argv++; | |
2547 | c = gettoggle(name); | |
2548 | if (c == Ambiguous(struct togglelist *)) { | |
2549 | fprintf(stderr, "'%s': ambiguous argument ('toggle ?' for help).\n", | |
2550 | name); | |
2551 | return 0; | |
2552 | } else if (c == 0) { | |
2553 | fprintf(stderr, "'%s': unknown argument ('toggle ?' for help).\n", | |
2554 | name); | |
2555 | return 0; | |
2556 | } else { | |
2557 | if (c->variable) { | |
2558 | *c->variable = !*c->variable; /* invert it */ | |
2559 | printf("%s %s.\n", *c->variable? "Will" : "Won't", | |
2560 | c->actionexplanation); | |
2561 | } | |
2562 | if (c->handler) { | |
2563 | retval &= (*c->handler)(c); | |
2564 | } | |
2565 | } | |
2566 | } | |
2567 | return retval; | |
2568 | } | |
2569 | \f | |
2570 | /* | |
2571 | * The following perform the "set" command. | |
2572 | */ | |
2573 | ||
2574 | struct setlist { | |
2575 | char *name; /* name */ | |
2576 | char *help; /* help information */ | |
2577 | char *charp; /* where it is located at */ | |
2578 | }; | |
2579 | ||
2580 | static struct setlist Setlist[] = { | |
2581 | { "echo", "character to toggle local echoing on/off", &echoc }, | |
2582 | { "escape", "character to escape back to telnet command mode", &escape }, | |
2583 | { " ", "" }, | |
2584 | { " ", "The following need 'localchars' to be toggled true", 0 }, | |
2585 | { "erase", "character to cause an Erase Character", &nttyb.sg_erase }, | |
2586 | { "flushoutput", "character to cause an Abort Oubput", &nltc.t_flushc }, | |
2587 | { "interrupt", "character to cause an Interrupt Process", &ntc.t_intrc }, | |
2588 | { "kill", "character to cause an Erase Line", &nttyb.sg_kill }, | |
2589 | { "quit", "character to cause a Break", &ntc.t_quitc }, | |
2590 | { "eof", "character to cause an EOF ", &ntc.t_eofc }, | |
2591 | { 0 } | |
2592 | }; | |
2593 | ||
2594 | static char ** | |
2595 | getnextset(name) | |
2596 | char *name; | |
2597 | { | |
2598 | struct setlist *c = (struct setlist *)name; | |
2599 | ||
2600 | return (char **) (c+1); | |
2601 | } | |
2602 | ||
2603 | static struct setlist * | |
2604 | getset(name) | |
2605 | char *name; | |
2606 | { | |
2607 | return (struct setlist *) genget(name, (char **) Setlist, getnextset); | |
2608 | } | |
2609 | ||
2610 | static | |
2611 | setcmd(argc, argv) | |
2612 | int argc; | |
2613 | char *argv[]; | |
2614 | { | |
2615 | int value; | |
2616 | struct setlist *ct; | |
2617 | ||
2618 | /* XXX back we go... sigh */ | |
2619 | if (argc != 3) { | |
2620 | if ((argc == 2) && | |
2621 | ((!strcmp(argv[1], "?")) || (!strcmp(argv[1], "help")))) { | |
2622 | for (ct = Setlist; ct->name; ct++) { | |
2623 | printf("%s\t%s\n", ct->name, ct->help); | |
2624 | } | |
2625 | printf("?\tdisplay help information\n"); | |
2626 | } else { | |
2627 | printf("Format is 'set Name Value'\n'set ?' for help.\n"); | |
2628 | } | |
2629 | return 0; | |
2630 | } | |
2631 | ||
2632 | ct = getset(argv[1]); | |
2633 | if (ct == 0) { | |
2634 | fprintf(stderr, "'%s': unknown argument ('set ?' for help).\n", | |
2635 | argv[1]); | |
2636 | return 0; | |
2637 | } else if (ct == Ambiguous(struct setlist *)) { | |
2638 | fprintf(stderr, "'%s': ambiguous argument ('set ?' for help).\n", | |
2639 | argv[1]); | |
2640 | return 0; | |
2641 | } else { | |
2642 | if (strcmp("off", argv[2])) { | |
2643 | value = special(argv[2]); | |
2644 | } else { | |
2645 | value = -1; | |
2646 | } | |
2647 | *(ct->charp) = value; | |
2648 | printf("%s character is '%s'.\n", ct->name, control(*(ct->charp))); | |
2649 | } | |
2650 | return 1; | |
2651 | } | |
2652 | \f | |
2653 | /* | |
2654 | * The following are the data structures and routines for the | |
2655 | * 'mode' command. | |
2656 | */ | |
2657 | ||
2658 | static | |
2659 | dolinemode() | |
2660 | { | |
2661 | if (hisopts[TELOPT_SGA]) { | |
2662 | wontoption(TELOPT_SGA, 0); | |
2663 | } | |
2664 | if (hisopts[TELOPT_ECHO]) { | |
2665 | wontoption(TELOPT_ECHO, 0); | |
2666 | } | |
2667 | return 1; | |
2668 | } | |
2669 | ||
2670 | static | |
2671 | docharmode() | |
2672 | { | |
2673 | if (!hisopts[TELOPT_SGA]) { | |
2674 | willoption(TELOPT_SGA, 0); | |
2675 | } | |
2676 | if (!hisopts[TELOPT_ECHO]) { | |
2677 | willoption(TELOPT_ECHO, 0); | |
2678 | } | |
2679 | return 1; | |
2680 | } | |
2681 | ||
2682 | static struct cmd Modelist[] = { | |
2683 | { "character", "character-at-a-time mode", docharmode, 1, 1 }, | |
2684 | { "line", "line-by-line mode", dolinemode, 1, 1 }, | |
2685 | { 0 }, | |
2686 | }; | |
2687 | ||
2688 | static char ** | |
2689 | getnextmode(name) | |
2690 | char *name; | |
2691 | { | |
2692 | struct cmd *c = (struct cmd *) name; | |
2693 | ||
2694 | return (char **) (c+1); | |
2695 | } | |
2696 | ||
2697 | static struct cmd * | |
2698 | getmodecmd(name) | |
2699 | char *name; | |
2700 | { | |
2701 | return (struct cmd *) genget(name, (char **) Modelist, getnextmode); | |
2702 | } | |
2703 | ||
2704 | static | |
2705 | modecmd(argc, argv) | |
2706 | int argc; | |
2707 | char *argv[]; | |
2708 | { | |
2709 | struct cmd *mt; | |
2710 | ||
2711 | if ((argc != 2) || !strcmp(argv[1], "?") || !strcmp(argv[1], "help")) { | |
2712 | printf("format is: 'mode Mode', where 'Mode' is one of:\n\n"); | |
2713 | for (mt = Modelist; mt->name; mt++) { | |
2714 | printf("%s\t%s\n", mt->name, mt->help); | |
2715 | } | |
2716 | return 0; | |
2717 | } | |
2718 | mt = getmodecmd(argv[1]); | |
2719 | if (mt == 0) { | |
2720 | fprintf(stderr, "Unknown mode '%s' ('mode ?' for help).\n", argv[1]); | |
2721 | return 0; | |
2722 | } else if (mt == Ambiguous(struct cmd *)) { | |
2723 | fprintf(stderr, "Ambiguous mode '%s' ('mode ?' for help).\n", argv[1]); | |
2724 | return 0; | |
2725 | } else { | |
2726 | (*mt->handler)(); | |
2727 | } | |
2728 | return 1; | |
2729 | } | |
2730 | \f | |
2731 | /* | |
2732 | * The following data structures and routines implement the | |
2733 | * "display" command. | |
2734 | */ | |
2735 | ||
2736 | static | |
2737 | display(argc, argv) | |
2738 | int argc; | |
2739 | char *argv[]; | |
2740 | { | |
2741 | #define dotog(tl) if (tl->variable && tl->actionexplanation) { \ | |
2742 | if (*tl->variable) { \ | |
2743 | printf("will"); \ | |
2744 | } else { \ | |
2745 | printf("won't"); \ | |
2746 | } \ | |
2747 | printf(" %s.\n", tl->actionexplanation); \ | |
2748 | } | |
2749 | ||
2750 | #define doset(sl) if (sl->name && *sl->name != ' ') { \ | |
2751 | printf("[%s]\t%s.\n", control(*sl->charp), sl->name); \ | |
2752 | } | |
2753 | ||
2754 | struct togglelist *tl; | |
2755 | struct setlist *sl; | |
2756 | ||
2757 | if (argc == 1) { | |
2758 | for (tl = Togglelist; tl->name; tl++) { | |
2759 | dotog(tl); | |
2760 | } | |
2761 | printf("\n"); | |
2762 | for (sl = Setlist; sl->name; sl++) { | |
2763 | doset(sl); | |
2764 | } | |
2765 | } else { | |
2766 | int i; | |
2767 | ||
2768 | for (i = 1; i < argc; i++) { | |
2769 | sl = getset(argv[i]); | |
2770 | tl = gettoggle(argv[i]); | |
2771 | if ((sl == Ambiguous(struct setlist *)) || | |
2772 | (tl == Ambiguous(struct togglelist *))) { | |
2773 | printf("?Ambiguous argument '%s'.\n", argv[i]); | |
2774 | return 0; | |
2775 | } else if (!sl && !tl) { | |
2776 | printf("?Unknown argument '%s'.\n", argv[i]); | |
2777 | return 0; | |
2778 | } else { | |
2779 | if (tl) { | |
2780 | dotog(tl); | |
2781 | } | |
2782 | if (sl) { | |
2783 | doset(sl); | |
2784 | } | |
2785 | } | |
2786 | } | |
2787 | } | |
2788 | return 1; | |
2789 | #undef doset | |
2790 | #undef dotog | |
2791 | } | |
2792 | \f | |
2793 | /* | |
2794 | * The following are the data structures, and many of the routines, | |
2795 | * relating to command processing. | |
2796 | */ | |
2797 | ||
2798 | /* | |
2799 | * Set the escape character. | |
2800 | */ | |
2801 | static | |
2802 | setescape(argc, argv) | |
2803 | int argc; | |
2804 | char *argv[]; | |
2805 | { | |
2806 | register char *arg; | |
2807 | char buf[50]; | |
2808 | ||
2809 | printf( | |
2810 | "Deprecated usage - please use 'set escape%s%s' in the future.\n", | |
2811 | (argc > 2)? " ":"", (argc > 2)? argv[1]: ""); | |
2812 | if (argc > 2) | |
2813 | arg = argv[1]; | |
2814 | else { | |
2815 | printf("new escape character: "); | |
2816 | gets(buf); | |
2817 | arg = buf; | |
2818 | } | |
2819 | if (arg[0] != '\0') | |
2820 | escape = arg[0]; | |
2821 | if (!In3270) { | |
2822 | printf("Escape character is '%s'.\n", control(escape)); | |
2823 | } | |
2824 | fflush(stdout); | |
2825 | return 1; | |
2826 | } | |
2827 | ||
2828 | /*VARARGS*/ | |
2829 | static | |
2830 | togcrmod() | |
2831 | { | |
2832 | crmod = !crmod; | |
2833 | printf("Deprecated usage - please use 'toggle crmod' in the future.\n"); | |
2834 | printf("%s map carriage return on output.\n", crmod ? "Will" : "Won't"); | |
2835 | fflush(stdout); | |
2836 | return 1; | |
2837 | } | |
2838 | ||
2839 | /*VARARGS*/ | |
2840 | suspend() | |
2841 | { | |
2842 | setcommandmode(); | |
2843 | #if defined(unix) | |
2844 | kill(0, SIGTSTP); | |
2845 | #endif /* defined(unix) */ | |
2846 | /* reget parameters in case they were changed */ | |
2847 | ioctl(0, TIOCGETP, (char *)&ottyb); | |
2848 | ioctl(0, TIOCGETC, (char *)&otc); | |
2849 | ioctl(0, TIOCGLTC, (char *)&oltc); | |
2850 | return 1; | |
2851 | } | |
2852 | ||
2853 | /*VARARGS*/ | |
2854 | static | |
0d3c45d4 GM |
2855 | bye(argc, argv) |
2856 | int argc; /* Number of arguments */ | |
2857 | char *argv[]; /* arguments */ | |
3e91ea2a GM |
2858 | { |
2859 | if (connected) { | |
2860 | shutdown(net, 2); | |
2861 | printf("Connection closed.\n"); | |
2862 | close(net); | |
2863 | connected = 0; | |
2864 | /* reset options */ | |
0d3c45d4 | 2865 | tninit(); |
3e91ea2a | 2866 | #if defined(TN3270) |
0d3c45d4 | 2867 | SetIn3270(); /* Get out of 3270 mode */ |
3e91ea2a GM |
2868 | #endif /* defined(TN3270) */ |
2869 | } | |
0d3c45d4 GM |
2870 | if ((argc != 2) || (strcmp(argv[1], "fromquit") != 0)) { |
2871 | longjmp(toplevel, 1); | |
2872 | /* NOTREACHED */ | |
2873 | } | |
2874 | return 1; /* Keep lint, etc., happy */ | |
3e91ea2a GM |
2875 | } |
2876 | ||
2877 | /*VARARGS*/ | |
2878 | quit() | |
2879 | { | |
0d3c45d4 | 2880 | (void) call(bye, "bye", "fromquit", 0); |
3e91ea2a GM |
2881 | Exit(0); |
2882 | /*NOTREACHED*/ | |
2883 | return 1; /* just to keep lint happy */ | |
2884 | } | |
2885 | ||
2886 | /* | |
2887 | * Print status about the connection. | |
2888 | */ | |
2889 | static | |
2890 | status(argc, argv) | |
2891 | int argc; | |
2892 | char *argv[]; | |
2893 | { | |
2894 | if (connected) { | |
2895 | printf("Connected to %s.\n", hostname); | |
2896 | if (argc < 2) { | |
2897 | printf("Operating in %s.\n", | |
2898 | modelist[getconnmode()].modedescriptions); | |
2899 | if (localchars) { | |
2900 | printf("Catching signals locally.\n"); | |
2901 | } | |
2902 | } | |
2903 | } else { | |
2904 | printf("No connection.\n"); | |
2905 | } | |
2906 | # if !defined(TN3270) | |
2907 | printf("Escape character is '%s'.\n", control(escape)); | |
2908 | fflush(stdout); | |
2909 | # else /* !defined(TN3270) */ | |
2910 | if ((!In3270) && ((argc < 2) || strcmp(argv[1], "notmuch"))) { | |
2911 | printf("Escape character is '%s'.\n", control(escape)); | |
2912 | } | |
2913 | # if defined(unix) | |
2914 | if (In3270 && transcom) { | |
2915 | printf("Transparent mode command is '%s'.\n", transcom); | |
2916 | } | |
2917 | # endif /* defined(unix) */ | |
2918 | fflush(stdout); | |
2919 | if (In3270) { | |
2920 | return 0; | |
2921 | } | |
2922 | # endif /* defined(TN3270) */ | |
2923 | return 1; | |
2924 | } | |
2925 | ||
2926 | #if defined(TN3270) && defined(unix) | |
2927 | static | |
2928 | settranscom(argc, argv) | |
2929 | int argc; | |
2930 | char *argv[]; | |
2931 | { | |
2932 | int i, len = 0; | |
2933 | char *strcpy(), *strcat(); | |
2934 | ||
2935 | if (argc == 1 && transcom) { | |
2936 | transcom = 0; | |
2937 | } | |
2938 | if (argc == 1) { | |
2939 | return; | |
2940 | } | |
2941 | for (i = 1; i < argc; ++i) { | |
2942 | len += 1 + strlen(argv[1]); | |
2943 | } | |
2944 | transcom = tline; | |
2945 | (void) strcpy(transcom, argv[1]); | |
2946 | for (i = 2; i < argc; ++i) { | |
2947 | (void) strcat(transcom, " "); | |
2948 | (void) strcat(transcom, argv[i]); | |
2949 | } | |
2950 | } | |
2951 | #endif /* defined(TN3270) && defined(unix) */ | |
2952 | ||
2953 | ||
2954 | static | |
2955 | tn(argc, argv) | |
2956 | int argc; | |
2957 | char *argv[]; | |
2958 | { | |
2959 | register struct hostent *host = 0; | |
2960 | #if defined(msdos) | |
2961 | char *cp; | |
58f9a26f | 2962 | #endif /* defined(msdos) */ |
3e91ea2a GM |
2963 | |
2964 | if (connected) { | |
2965 | printf("?Already connected to %s\n", hostname); | |
2966 | return 0; | |
2967 | } | |
2968 | if (argc < 2) { | |
2969 | (void) strcpy(line, "Connect "); | |
2970 | printf("(to) "); | |
2971 | gets(&line[strlen(line)]); | |
2972 | makeargv(); | |
2973 | argc = margc; | |
2974 | argv = margv; | |
2975 | } | |
2976 | if (argc > 3) { | |
2977 | printf("usage: %s host-name [port]\n", argv[0]); | |
2978 | return 0; | |
2979 | } | |
2980 | #if defined(msdos) | |
2981 | for (cp = argv[1]; *cp; cp++) { | |
2982 | if (isupper(*cp)) { | |
2983 | *cp = tolower(*cp); | |
2984 | } | |
2985 | } | |
2986 | #endif /* defined(msdos) */ | |
2987 | sin.sin_addr.s_addr = inet_addr(argv[1]); | |
2988 | if (sin.sin_addr.s_addr != -1) { | |
2989 | sin.sin_family = AF_INET; | |
2990 | (void) strcpy(hnamebuf, argv[1]); | |
2991 | hostname = hnamebuf; | |
2992 | } else { | |
2993 | host = gethostbyname(argv[1]); | |
2994 | if (host) { | |
2995 | sin.sin_family = host->h_addrtype; | |
2996 | #if defined(h_addr) /* In 4.3, this is a #define */ | |
2997 | bcopy(host->h_addr_list[0], (caddr_t)&sin.sin_addr, host->h_length); | |
2998 | #else /* defined(h_addr) */ | |
2999 | bcopy(host->h_addr, (caddr_t)&sin.sin_addr, host->h_length); | |
3000 | #endif /* defined(h_addr) */ | |
3001 | hostname = host->h_name; | |
3002 | } else { | |
3003 | printf("%s: unknown host\n", argv[1]); | |
3004 | return 0; | |
3005 | } | |
3006 | } | |
3007 | sin.sin_port = sp->s_port; | |
3008 | if (argc == 3) { | |
3009 | sin.sin_port = atoi(argv[2]); | |
3010 | if (sin.sin_port == 0) { | |
3011 | sp = getservbyname(argv[2], "tcp"); | |
3012 | if (sp) | |
3013 | sin.sin_port = sp->s_port; | |
3014 | else { | |
3015 | printf("%s: bad port number\n", argv[2]); | |
3016 | return 0; | |
3017 | } | |
3018 | } else { | |
3019 | sin.sin_port = atoi(argv[2]); | |
3020 | sin.sin_port = htons(sin.sin_port); | |
3021 | } | |
3022 | telnetport = 0; | |
3023 | } else { | |
3024 | telnetport = 1; | |
3025 | } | |
3026 | #if defined(unix) | |
3027 | signal(SIGINT, intr); | |
3028 | signal(SIGQUIT, intr2); | |
3029 | signal(SIGPIPE, deadpeer); | |
3030 | #endif /* defined(unix) */ | |
3031 | printf("Trying...\n"); | |
3032 | do { | |
3033 | net = socket(AF_INET, SOCK_STREAM, 0); | |
3034 | if (net < 0) { | |
3035 | perror("telnet: socket"); | |
3036 | return 0; | |
3037 | } | |
3038 | #ifndef NOT43 | |
3039 | if (debug && setsockopt(net, SOL_SOCKET, SO_DEBUG, | |
3040 | (char *)&debug, sizeof(debug)) < 0) | |
58f9a26f | 3041 | #else /* NOT43 */ |
3e91ea2a | 3042 | if (debug && setsockopt(net, SOL_SOCKET, SO_DEBUG, 0, 0) < 0) |
58f9a26f | 3043 | #endif /* NOT43 */ |
3e91ea2a GM |
3044 | perror("setsockopt (SO_DEBUG)"); |
3045 | ||
3046 | if (connect(net, (struct sockaddr *)&sin, sizeof (sin)) < 0) { | |
3047 | #if defined(h_addr) /* In 4.3, this is a #define */ | |
3048 | if (host && host->h_addr_list[1]) { | |
3049 | int oerrno = errno; | |
3050 | ||
3051 | fprintf(stderr, "telnet: connect to address %s: ", | |
3052 | inet_ntoa(sin.sin_addr)); | |
3053 | errno = oerrno; | |
3054 | perror((char *)0); | |
3055 | host->h_addr_list++; | |
3056 | bcopy(host->h_addr_list[0], | |
3057 | (caddr_t)&sin.sin_addr, host->h_length); | |
3058 | fprintf(stderr, "Trying %s...\n", | |
3059 | inet_ntoa(sin.sin_addr)); | |
3060 | (void) close(net); | |
3061 | continue; | |
3062 | } | |
3063 | #endif /* defined(h_addr) */ | |
3064 | perror("telnet: Unable to connect to remote host"); | |
3065 | #if defined(unix) | |
3066 | signal(SIGINT, SIG_DFL); | |
3067 | signal(SIGQUIT, SIG_DFL); | |
58f9a26f | 3068 | #endif /* defined(unix) */ |
3e91ea2a GM |
3069 | return 0; |
3070 | } | |
3071 | connected++; | |
3072 | } while (connected == 0); | |
3073 | call(status, "status", "notmuch", 0); | |
3074 | if (setjmp(peerdied) == 0) | |
3075 | telnet(); | |
3076 | ExitString(stderr, "Connection closed by foreign host.\n",1); | |
3077 | /*NOTREACHED*/ | |
3078 | } | |
3079 | ||
3080 | ||
3081 | #define HELPINDENT (sizeof ("connect")) | |
3082 | ||
3083 | static char | |
3084 | openhelp[] = "connect to a site", | |
3085 | closehelp[] = "close current connection", | |
3086 | quithelp[] = "exit telnet", | |
3087 | zhelp[] = "suspend telnet", | |
3088 | statushelp[] = "print status information", | |
3089 | helphelp[] = "print help information", | |
3090 | sendhelp[] = "transmit special characters ('send ?' for more)", | |
3091 | sethelp[] = "set operating parameters ('set ?' for more)", | |
3092 | togglestring[] ="toggle operating parameters ('toggle ?' for more)", | |
3093 | displayhelp[] = "display operating parameters", | |
3094 | #if defined(TN3270) && defined(unix) | |
3095 | transcomhelp[] = "specify Unix command for transparent mode pipe", | |
3096 | #endif /* defined(TN3270) && defined(unix) */ | |
3097 | modehelp[] = "try to enter line-by-line or character-at-a-time mode"; | |
3098 | ||
3099 | extern int help(); | |
3100 | ||
3101 | static struct cmd cmdtab[] = { | |
3102 | { "close", closehelp, bye, 1, 1 }, | |
3103 | { "display", displayhelp, display, 1, 0 }, | |
3104 | { "mode", modehelp, modecmd, 1, 1 }, | |
3105 | { "open", openhelp, tn, 1, 0 }, | |
3106 | { "quit", quithelp, quit, 1, 0 }, | |
3107 | { "send", sendhelp, sendcmd, 1, 1 }, | |
3108 | { "set", sethelp, setcmd, 1, 0 }, | |
3109 | { "status", statushelp, status, 1, 0 }, | |
3110 | { "toggle", togglestring, toggle, 1, 0 }, | |
3111 | #if defined(TN3270) && defined(unix) | |
3112 | { "transcom", transcomhelp, settranscom, 1, 0 }, | |
3113 | #endif /* defined(TN3270) && defined(unix) */ | |
3114 | { "z", zhelp, suspend, 1, 0 }, | |
3115 | { "?", helphelp, help, 1, 0 }, | |
3116 | 0 | |
3117 | }; | |
3118 | ||
3119 | static char crmodhelp[] = "deprecated command -- use 'toggle crmod' instead"; | |
3120 | static char escapehelp[] = "deprecated command -- use 'set escape' instead"; | |
3121 | ||
3122 | static struct cmd cmdtab2[] = { | |
3123 | { "help", helphelp, help, 0, 0 }, | |
3124 | { "escape", escapehelp, setescape, 1, 0 }, | |
3125 | { "crmod", crmodhelp, togcrmod, 1, 0 }, | |
3126 | 0 | |
3127 | }; | |
3128 | ||
3129 | /* | |
3130 | * Call routine with argc, argv set from args (terminated by 0). | |
3131 | * VARARGS2 | |
3132 | */ | |
3133 | static | |
3134 | call(routine, args) | |
3135 | int (*routine)(); | |
3136 | char *args; | |
3137 | { | |
3138 | register char **argp; | |
3139 | register int argc; | |
3140 | ||
3141 | for (argc = 0, argp = &args; *argp++ != 0; argc++) | |
3142 | ; | |
3143 | return (*routine)(argc, &args); | |
3144 | } | |
3145 | ||
3146 | static char ** | |
3147 | getnextcmd(name) | |
3148 | char *name; | |
3149 | { | |
3150 | struct cmd *c = (struct cmd *) name; | |
3151 | ||
3152 | return (char **) (c+1); | |
3153 | } | |
3154 | ||
3155 | static struct cmd * | |
3156 | getcmd(name) | |
3157 | char *name; | |
3158 | { | |
3159 | struct cmd *cm; | |
3160 | ||
3161 | if ((cm = (struct cmd *) genget(name, (char **) cmdtab, getnextcmd)) != 0) { | |
3162 | return cm; | |
3163 | } else { | |
3164 | return (struct cmd *) genget(name, (char **) cmdtab2, getnextcmd); | |
3165 | } | |
3166 | } | |
3167 | ||
3168 | void | |
3169 | command(top) | |
3170 | int top; | |
3171 | { | |
3172 | register struct cmd *c; | |
3173 | ||
3174 | setcommandmode(); | |
3175 | if (!top) { | |
3176 | putchar('\n'); | |
3177 | } else { | |
3178 | #if defined(unix) | |
3179 | signal(SIGINT, SIG_DFL); | |
3180 | signal(SIGQUIT, SIG_DFL); | |
3181 | #endif /* defined(unix) */ | |
3182 | } | |
3183 | for (;;) { | |
3184 | printf("%s> ", prompt); | |
3185 | if (gets(line) == NULL) { | |
3186 | if (feof(stdin) || ferror(stdin)) | |
3187 | quit(); | |
3188 | break; | |
3189 | } | |
3190 | if (line[0] == 0) | |
3191 | break; | |
3192 | makeargv(); | |
3193 | c = getcmd(margv[0]); | |
3194 | if (c == Ambiguous(struct cmd *)) { | |
3195 | printf("?Ambiguous command\n"); | |
3196 | continue; | |
3197 | } | |
3198 | if (c == 0) { | |
3199 | printf("?Invalid command\n"); | |
3200 | continue; | |
3201 | } | |
3202 | if (c->needconnect && !connected) { | |
3203 | printf("?Need to be connected first.\n"); | |
3204 | continue; | |
3205 | } | |
3206 | if ((*c->handler)(margc, margv)) { | |
3207 | break; | |
3208 | } | |
3209 | } | |
3210 | if (!top) { | |
3211 | if (!connected) { | |
3212 | longjmp(toplevel, 1); | |
3213 | /*NOTREACHED*/ | |
3214 | } | |
3215 | setconnmode(); | |
3216 | } | |
3217 | } | |
3218 | \f | |
3219 | /* | |
3220 | * Help command. | |
3221 | */ | |
3222 | static | |
3223 | help(argc, argv) | |
3224 | int argc; | |
3225 | char *argv[]; | |
3226 | { | |
3227 | register struct cmd *c; | |
3228 | ||
3229 | if (argc == 1) { | |
3230 | printf("Commands may be abbreviated. Commands are:\n\n"); | |
3231 | for (c = cmdtab; c->name; c++) | |
3232 | if (c->dohelp) { | |
3233 | printf("%-*s\t%s\n", HELPINDENT, c->name, | |
3234 | c->help); | |
3235 | } | |
3236 | return 0; | |
3237 | } | |
3238 | while (--argc > 0) { | |
3239 | register char *arg; | |
3240 | arg = *++argv; | |
3241 | c = getcmd(arg); | |
3242 | if (c == Ambiguous(struct cmd *)) | |
3243 | printf("?Ambiguous help command %s\n", arg); | |
3244 | else if (c == (struct cmd *)0) | |
3245 | printf("?Invalid help command %s\n", arg); | |
3246 | else | |
3247 | printf("%s\n", c->help); | |
3248 | } | |
3249 | return 0; | |
3250 | } | |
3251 | \f | |
3252 | /* | |
3253 | * main. Parse arguments, invoke the protocol or command parser. | |
3254 | */ | |
3255 | ||
3256 | ||
3257 | void | |
3258 | main(argc, argv) | |
3259 | int argc; | |
3260 | char *argv[]; | |
3261 | { | |
0d3c45d4 GM |
3262 | tninit(); /* Clear out things */ |
3263 | ||
3e91ea2a GM |
3264 | NetTrace = stdout; |
3265 | ioctl(0, TIOCGETP, (char *)&ottyb); | |
3266 | ioctl(0, TIOCGETC, (char *)&otc); | |
3267 | ioctl(0, TIOCGLTC, (char *)&oltc); | |
3268 | #if defined(LNOFLSH) | |
3269 | ioctl(0, TIOCLGET, (char *)&autoflush); | |
3270 | autoflush = !(autoflush&LNOFLSH); /* if LNOFLSH, no autoflush */ | |
3271 | #else /* LNOFLSH */ | |
3272 | autoflush = 1; | |
3273 | #endif /* LNOFLSH */ | |
3274 | ntc = otc; | |
3275 | nltc = oltc; | |
3276 | nttyb = ottyb; | |
3277 | setbuf(stdin, (char *)0); | |
3278 | setbuf(stdout, (char *)0); | |
3279 | prompt = argv[0]; | |
3280 | if (argc > 1 && !strcmp(argv[1], "-d")) { | |
3281 | debug = 1; | |
3282 | argv++; | |
3283 | argc--; | |
3284 | } | |
3285 | if (argc > 1 && !strcmp(argv[1], "-n")) { | |
3286 | argv++; | |
3287 | argc--; | |
3288 | if (argc > 1) { /* get file name */ | |
3289 | NetTrace = fopen(argv[1], "w"); | |
3290 | argv++; | |
3291 | argc--; | |
3292 | if (NetTrace == NULL) { | |
3293 | NetTrace = stdout; | |
3294 | } | |
3295 | } | |
3296 | } | |
3297 | #if defined(TN3270) && defined(unix) | |
3298 | if (argc > 1 && !strcmp(argv[1], "-t")) { | |
3299 | argv++; | |
3300 | argc--; | |
3301 | if (argc > 1) { /* get command name */ | |
3302 | transcom = tline; | |
3303 | (void) strcpy(transcom, argv[1]); | |
3304 | argv++; | |
3305 | argc--; | |
3306 | } | |
3307 | } | |
3308 | #endif /* defined(TN3270) && defined(unix) */ | |
3309 | if (argc != 1) { | |
3310 | if (setjmp(toplevel) != 0) | |
3311 | Exit(0); | |
3312 | tn(argc, argv); | |
3313 | } | |
3314 | setjmp(toplevel); | |
3315 | for (;;) | |
3316 | command(1); | |
3317 | } |