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1.1 deraadt 1: /*
2: * Copyright (c) 1988, 1990, 1993
3: * The Regents of the University of California. All rights reserved.
4: *
5: * Redistribution and use in source and binary forms, with or without
6: * modification, are permitted provided that the following conditions
7: * are met:
8: * 1. Redistributions of source code must retain the above copyright
9: * notice, this list of conditions and the following disclaimer.
10: * 2. Redistributions in binary form must reproduce the above copyright
11: * notice, this list of conditions and the following disclaimer in the
12: * documentation and/or other materials provided with the distribution.
13: * 3. All advertising materials mentioning features or use of this software
14: * must display the following acknowledgement:
15: * This product includes software developed by the University of
16: * California, Berkeley and its contributors.
17: * 4. Neither the name of the University nor the names of its contributors
18: * may be used to endorse or promote products derived from this software
19: * without specific prior written permission.
20: *
21: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31: * SUCH DAMAGE.
32: */
33:
34: #ifndef lint
35: /* from: static char sccsid[] = "@(#)telnet.c 8.1 (Berkeley) 6/6/93"; */
36: static char *rcsid = "$Id: telnet.c,v 1.4 1995/03/17 18:03:10 mycroft Exp $";
37: #endif /* not lint */
38:
39: #include <sys/types.h>
40:
41: #if defined(unix)
42: #include <signal.h>
43: /* By the way, we need to include curses.h before telnet.h since,
44: * among other things, telnet.h #defines 'DO', which is a variable
45: * declared in curses.h.
46: */
47: #endif /* defined(unix) */
48:
49: #include <arpa/telnet.h>
50:
51: #include <ctype.h>
52:
53: #include "ring.h"
54:
55: #include "defines.h"
56: #include "externs.h"
57: #include "types.h"
58: #include "general.h"
59:
60:
61: #define strip(x) ((x)&0x7f)
62:
63: static unsigned char subbuffer[SUBBUFSIZE],
64: *subpointer, *subend; /* buffer for sub-options */
65: #define SB_CLEAR() subpointer = subbuffer;
66: #define SB_TERM() { subend = subpointer; SB_CLEAR(); }
67: #define SB_ACCUM(c) if (subpointer < (subbuffer+sizeof subbuffer)) { \
68: *subpointer++ = (c); \
69: }
70:
71: #define SB_GET() ((*subpointer++)&0xff)
72: #define SB_PEEK() ((*subpointer)&0xff)
73: #define SB_EOF() (subpointer >= subend)
74: #define SB_LEN() (subend - subpointer)
75:
76: char options[256]; /* The combined options */
77: char do_dont_resp[256];
78: char will_wont_resp[256];
79:
80: int
81: eight = 0,
82: autologin = 0, /* Autologin anyone? */
83: skiprc = 0,
84: connected,
85: showoptions,
86: In3270, /* Are we in 3270 mode? */
87: ISend, /* trying to send network data in */
88: debug = 0,
89: crmod,
90: netdata, /* Print out network data flow */
91: crlf, /* Should '\r' be mapped to <CR><LF> (or <CR><NUL>)? */
92: #if defined(TN3270)
93: noasynchtty = 0,/* User specified "-noasynch" on command line */
94: noasynchnet = 0,/* User specified "-noasynch" on command line */
95: askedSGA = 0, /* We have talked about suppress go ahead */
96: #endif /* defined(TN3270) */
97: telnetport,
98: SYNCHing, /* we are in TELNET SYNCH mode */
99: flushout, /* flush output */
100: autoflush = 0, /* flush output when interrupting? */
101: autosynch, /* send interrupt characters with SYNCH? */
102: localflow, /* we handle flow control locally */
103: restartany, /* if flow control enabled, restart on any character */
104: localchars, /* we recognize interrupt/quit */
105: donelclchars, /* the user has set "localchars" */
106: donebinarytoggle, /* the user has put us in binary */
107: dontlecho, /* do we suppress local echoing right now? */
108: globalmode,
109: clienteof = 0;
110:
111: char *prompt = 0;
112:
113: cc_t escape;
114: cc_t rlogin;
115: #ifdef KLUDGELINEMODE
116: cc_t echoc;
117: #endif
118:
119: /*
120: * Telnet receiver states for fsm
121: */
122: #define TS_DATA 0
123: #define TS_IAC 1
124: #define TS_WILL 2
125: #define TS_WONT 3
126: #define TS_DO 4
127: #define TS_DONT 5
128: #define TS_CR 6
129: #define TS_SB 7 /* sub-option collection */
130: #define TS_SE 8 /* looking for sub-option end */
131:
132: static int telrcv_state;
133: #ifdef OLD_ENVIRON
134: unsigned char telopt_environ = TELOPT_NEW_ENVIRON;
135: #else
136: # define telopt_environ TELOPT_NEW_ENVIRON
137: #endif
138:
139: jmp_buf toplevel = { 0 };
140: jmp_buf peerdied;
141:
142: int flushline;
143: int linemode;
144:
145: #ifdef KLUDGELINEMODE
146: int kludgelinemode = 1;
147: #endif
148:
149: /*
150: * The following are some clocks used to decide how to interpret
151: * the relationship between various variables.
152: */
153:
154: Clocks clocks;
155:
156: #ifdef notdef
157: Modelist modelist[] = {
158: { "telnet command mode", COMMAND_LINE },
159: { "character-at-a-time mode", 0 },
160: { "character-at-a-time mode (local echo)", LOCAL_ECHO|LOCAL_CHARS },
161: { "line-by-line mode (remote echo)", LINE | LOCAL_CHARS },
162: { "line-by-line mode", LINE | LOCAL_ECHO | LOCAL_CHARS },
163: { "line-by-line mode (local echoing suppressed)", LINE | LOCAL_CHARS },
164: { "3270 mode", 0 },
165: };
166: #endif
167:
168:
169: /*
170: * Initialize telnet environment.
171: */
172:
173: void
174: init_telnet()
175: {
176: env_init();
177:
178: SB_CLEAR();
179: ClearArray(options);
180:
181: connected = In3270 = ISend = localflow = donebinarytoggle = 0;
182: #if defined(AUTHENTICATION)
183: auth_encrypt_connect(connected);
184: #endif /* defined(AUTHENTICATION) */
185: restartany = -1;
186:
187: SYNCHing = 0;
188:
189: /* Don't change NetTrace */
190:
191: escape = CONTROL(']');
192: rlogin = _POSIX_VDISABLE;
193: #ifdef KLUDGELINEMODE
194: echoc = CONTROL('E');
195: #endif
196:
197: flushline = 1;
198: telrcv_state = TS_DATA;
199: }
200:
201:
202: #ifdef notdef
203: #include <varargs.h>
204:
205: /*VARARGS*/
206: static void
207: printring(va_alist)
208: va_dcl
209: {
210: va_list ap;
211: char buffer[100]; /* where things go */
212: char *ptr;
213: char *format;
214: char *string;
215: Ring *ring;
216: int i;
217:
218: va_start(ap);
219:
220: ring = va_arg(ap, Ring *);
221: format = va_arg(ap, char *);
222: ptr = buffer;
223:
224: while ((i = *format++) != 0) {
225: if (i == '%') {
226: i = *format++;
227: switch (i) {
228: case 'c':
229: *ptr++ = va_arg(ap, int);
230: break;
231: case 's':
232: string = va_arg(ap, char *);
233: ring_supply_data(ring, buffer, ptr-buffer);
234: ring_supply_data(ring, string, strlen(string));
235: ptr = buffer;
236: break;
237: case 0:
238: ExitString("printring: trailing %%.\n", 1);
239: /*NOTREACHED*/
240: default:
241: ExitString("printring: unknown format character.\n", 1);
242: /*NOTREACHED*/
243: }
244: } else {
245: *ptr++ = i;
246: }
247: }
248: ring_supply_data(ring, buffer, ptr-buffer);
249: }
250: #endif
251:
252: /*
253: * These routines are in charge of sending option negotiations
254: * to the other side.
255: *
256: * The basic idea is that we send the negotiation if either side
257: * is in disagreement as to what the current state should be.
258: */
259:
260: void
261: send_do(c, init)
262: register int c, init;
263: {
264: if (init) {
265: if (((do_dont_resp[c] == 0) && my_state_is_do(c)) ||
266: my_want_state_is_do(c))
267: return;
268: set_my_want_state_do(c);
269: do_dont_resp[c]++;
270: }
271: NET2ADD(IAC, DO);
272: NETADD(c);
273: printoption("SENT", DO, c);
274: }
275:
276: void
277: send_dont(c, init)
278: register int c, init;
279: {
280: if (init) {
281: if (((do_dont_resp[c] == 0) && my_state_is_dont(c)) ||
282: my_want_state_is_dont(c))
283: return;
284: set_my_want_state_dont(c);
285: do_dont_resp[c]++;
286: }
287: NET2ADD(IAC, DONT);
288: NETADD(c);
289: printoption("SENT", DONT, c);
290: }
291:
292: void
293: send_will(c, init)
294: register int c, init;
295: {
296: if (init) {
297: if (((will_wont_resp[c] == 0) && my_state_is_will(c)) ||
298: my_want_state_is_will(c))
299: return;
300: set_my_want_state_will(c);
301: will_wont_resp[c]++;
302: }
303: NET2ADD(IAC, WILL);
304: NETADD(c);
305: printoption("SENT", WILL, c);
306: }
307:
308: void
309: send_wont(c, init)
310: register int c, init;
311: {
312: if (init) {
313: if (((will_wont_resp[c] == 0) && my_state_is_wont(c)) ||
314: my_want_state_is_wont(c))
315: return;
316: set_my_want_state_wont(c);
317: will_wont_resp[c]++;
318: }
319: NET2ADD(IAC, WONT);
320: NETADD(c);
321: printoption("SENT", WONT, c);
322: }
323:
324:
325: void
326: willoption(option)
327: int option;
328: {
329: int new_state_ok = 0;
330:
331: if (do_dont_resp[option]) {
332: --do_dont_resp[option];
333: if (do_dont_resp[option] && my_state_is_do(option))
334: --do_dont_resp[option];
335: }
336:
337: if ((do_dont_resp[option] == 0) && my_want_state_is_dont(option)) {
338:
339: switch (option) {
340:
341: case TELOPT_ECHO:
342: # if defined(TN3270)
343: /*
344: * The following is a pain in the rear-end.
345: * Various IBM servers (some versions of Wiscnet,
346: * possibly Fibronics/Spartacus, and who knows who
347: * else) will NOT allow us to send "DO SGA" too early
348: * in the setup proceedings. On the other hand,
349: * 4.2 servers (telnetd) won't set SGA correctly.
350: * So, we are stuck. Empirically (but, based on
351: * a VERY small sample), the IBM servers don't send
352: * out anything about ECHO, so we postpone our sending
353: * "DO SGA" until we see "WILL ECHO" (which 4.2 servers
354: * DO send).
355: */
356: {
357: if (askedSGA == 0) {
358: askedSGA = 1;
359: if (my_want_state_is_dont(TELOPT_SGA))
360: send_do(TELOPT_SGA, 1);
361: }
362: }
363: /* Fall through */
364: case TELOPT_EOR:
365: #endif /* defined(TN3270) */
366: case TELOPT_BINARY:
367: case TELOPT_SGA:
368: settimer(modenegotiated);
369: /* FALL THROUGH */
370: case TELOPT_STATUS:
371: #if defined(AUTHENTICATION)
372: case TELOPT_AUTHENTICATION:
373: #endif
374: new_state_ok = 1;
375: break;
376:
377: case TELOPT_TM:
378: if (flushout)
379: flushout = 0;
380: /*
381: * Special case for TM. If we get back a WILL,
382: * pretend we got back a WONT.
383: */
384: set_my_want_state_dont(option);
385: set_my_state_dont(option);
386: return; /* Never reply to TM will's/wont's */
387:
388: case TELOPT_LINEMODE:
389: default:
390: break;
391: }
392:
393: if (new_state_ok) {
394: set_my_want_state_do(option);
395: send_do(option, 0);
396: setconnmode(0); /* possibly set new tty mode */
397: } else {
398: do_dont_resp[option]++;
399: send_dont(option, 0);
400: }
401: }
402: set_my_state_do(option);
403: }
404:
405: void
406: wontoption(option)
407: int option;
408: {
409: if (do_dont_resp[option]) {
410: --do_dont_resp[option];
411: if (do_dont_resp[option] && my_state_is_dont(option))
412: --do_dont_resp[option];
413: }
414:
415: if ((do_dont_resp[option] == 0) && my_want_state_is_do(option)) {
416:
417: switch (option) {
418:
419: #ifdef KLUDGELINEMODE
420: case TELOPT_SGA:
421: if (!kludgelinemode)
422: break;
423: /* FALL THROUGH */
424: #endif
425: case TELOPT_ECHO:
426: settimer(modenegotiated);
427: break;
428:
429: case TELOPT_TM:
430: if (flushout)
431: flushout = 0;
432: set_my_want_state_dont(option);
433: set_my_state_dont(option);
434: return; /* Never reply to TM will's/wont's */
435:
436: default:
437: break;
438: }
439: set_my_want_state_dont(option);
440: if (my_state_is_do(option))
441: send_dont(option, 0);
442: setconnmode(0); /* Set new tty mode */
443: } else if (option == TELOPT_TM) {
444: /*
445: * Special case for TM.
446: */
447: if (flushout)
448: flushout = 0;
449: set_my_want_state_dont(option);
450: }
451: set_my_state_dont(option);
452: }
453:
454: static void
455: dooption(option)
456: int option;
457: {
458: int new_state_ok = 0;
459:
460: if (will_wont_resp[option]) {
461: --will_wont_resp[option];
462: if (will_wont_resp[option] && my_state_is_will(option))
463: --will_wont_resp[option];
464: }
465:
466: if (will_wont_resp[option] == 0) {
467: if (my_want_state_is_wont(option)) {
468:
469: switch (option) {
470:
471: case TELOPT_TM:
472: /*
473: * Special case for TM. We send a WILL, but pretend
474: * we sent WONT.
475: */
476: send_will(option, 0);
477: set_my_want_state_wont(TELOPT_TM);
478: set_my_state_wont(TELOPT_TM);
479: return;
480:
481: # if defined(TN3270)
482: case TELOPT_EOR: /* end of record */
483: # endif /* defined(TN3270) */
484: case TELOPT_BINARY: /* binary mode */
485: case TELOPT_NAWS: /* window size */
486: case TELOPT_TSPEED: /* terminal speed */
487: case TELOPT_LFLOW: /* local flow control */
488: case TELOPT_TTYPE: /* terminal type option */
489: case TELOPT_SGA: /* no big deal */
490: new_state_ok = 1;
491: break;
492:
493: case TELOPT_NEW_ENVIRON: /* New environment variable option */
494: #ifdef OLD_ENVIRON
495: if (my_state_is_will(TELOPT_OLD_ENVIRON))
496: send_wont(TELOPT_OLD_ENVIRON, 1); /* turn off the old */
497: goto env_common;
498: case TELOPT_OLD_ENVIRON: /* Old environment variable option */
499: if (my_state_is_will(TELOPT_NEW_ENVIRON))
500: break; /* Don't enable if new one is in use! */
501: env_common:
502: telopt_environ = option;
503: #endif
504: new_state_ok = 1;
505: break;
506:
507: #if defined(AUTHENTICATION)
508: case TELOPT_AUTHENTICATION:
509: if (autologin)
510: new_state_ok = 1;
511: break;
512: #endif
513:
514: case TELOPT_XDISPLOC: /* X Display location */
515: if (env_getvalue((unsigned char *)"DISPLAY"))
516: new_state_ok = 1;
517: break;
518:
519: case TELOPT_LINEMODE:
520: #ifdef KLUDGELINEMODE
521: kludgelinemode = 0;
522: send_do(TELOPT_SGA, 1);
523: #endif
524: set_my_want_state_will(TELOPT_LINEMODE);
525: send_will(option, 0);
526: set_my_state_will(TELOPT_LINEMODE);
527: slc_init();
528: return;
529:
530: case TELOPT_ECHO: /* We're never going to echo... */
531: default:
532: break;
533: }
534:
535: if (new_state_ok) {
536: set_my_want_state_will(option);
537: send_will(option, 0);
538: setconnmode(0); /* Set new tty mode */
539: } else {
540: will_wont_resp[option]++;
541: send_wont(option, 0);
542: }
543: } else {
544: /*
545: * Handle options that need more things done after the
546: * other side has acknowledged the option.
547: */
548: switch (option) {
549: case TELOPT_LINEMODE:
550: #ifdef KLUDGELINEMODE
551: kludgelinemode = 0;
552: send_do(TELOPT_SGA, 1);
553: #endif
554: set_my_state_will(option);
555: slc_init();
556: send_do(TELOPT_SGA, 0);
557: return;
558: }
559: }
560: }
561: set_my_state_will(option);
562: }
563:
564: static void
565: dontoption(option)
566: int option;
567: {
568:
569: if (will_wont_resp[option]) {
570: --will_wont_resp[option];
571: if (will_wont_resp[option] && my_state_is_wont(option))
572: --will_wont_resp[option];
573: }
574:
575: if ((will_wont_resp[option] == 0) && my_want_state_is_will(option)) {
576: switch (option) {
577: case TELOPT_LINEMODE:
578: linemode = 0; /* put us back to the default state */
579: break;
580: #ifdef OLD_ENVIRON
581: case TELOPT_NEW_ENVIRON:
582: /*
583: * The new environ option wasn't recognized, try
584: * the old one.
585: */
586: send_will(TELOPT_OLD_ENVIRON, 1);
587: telopt_environ = TELOPT_OLD_ENVIRON;
588: break;
589: #endif
590: }
591: /* we always accept a DONT */
592: set_my_want_state_wont(option);
593: if (my_state_is_will(option))
594: send_wont(option, 0);
595: setconnmode(0); /* Set new tty mode */
596: }
597: set_my_state_wont(option);
598: }
599:
600: /*
601: * Given a buffer returned by tgetent(), this routine will turn
602: * the pipe seperated list of names in the buffer into an array
603: * of pointers to null terminated names. We toss out any bad,
604: * duplicate, or verbose names (names with spaces).
605: */
606:
607: static char *name_unknown = "UNKNOWN";
608: static char *unknown[] = { 0, 0 };
609:
610: char **
611: mklist(buf, name)
612: char *buf, *name;
613: {
614: register int n;
615: register char c, *cp, **argvp, *cp2, **argv, **avt;
616:
617: if (name) {
618: if (strlen(name) > 40) {
619: name = 0;
620: unknown[0] = name_unknown;
621: } else {
622: unknown[0] = name;
623: upcase(name);
624: }
625: } else
626: unknown[0] = name_unknown;
627: /*
628: * Count up the number of names.
629: */
630: for (n = 1, cp = buf; *cp && *cp != ':'; cp++) {
631: if (*cp == '|')
632: n++;
633: }
634: /*
635: * Allocate an array to put the name pointers into
636: */
637: argv = (char **)malloc((n+3)*sizeof(char *));
638: if (argv == 0)
639: return(unknown);
640:
641: /*
642: * Fill up the array of pointers to names.
643: */
644: *argv = 0;
645: argvp = argv+1;
646: n = 0;
647: for (cp = cp2 = buf; (c = *cp); cp++) {
648: if (c == '|' || c == ':') {
649: *cp++ = '\0';
650: /*
651: * Skip entries that have spaces or are over 40
652: * characters long. If this is our environment
653: * name, then put it up front. Otherwise, as
654: * long as this is not a duplicate name (case
655: * insensitive) add it to the list.
656: */
657: if (n || (cp - cp2 > 41))
658: ;
659: else if (name && (strncasecmp(name, cp2, cp-cp2) == 0))
660: *argv = cp2;
661: else if (is_unique(cp2, argv+1, argvp))
662: *argvp++ = cp2;
663: if (c == ':')
664: break;
665: /*
666: * Skip multiple delimiters. Reset cp2 to
667: * the beginning of the next name. Reset n,
668: * the flag for names with spaces.
669: */
670: while ((c = *cp) == '|')
671: cp++;
672: cp2 = cp;
673: n = 0;
674: }
675: /*
676: * Skip entries with spaces or non-ascii values.
677: * Convert lower case letters to upper case.
678: */
679: if ((c == ' ') || !isascii(c))
680: n = 1;
681: else if (islower(c))
682: *cp = toupper(c);
683: }
684:
685: /*
686: * Check for an old V6 2 character name. If the second
687: * name points to the beginning of the buffer, and is
688: * only 2 characters long, move it to the end of the array.
689: */
690: if ((argv[1] == buf) && (strlen(argv[1]) == 2)) {
691: --argvp;
692: for (avt = &argv[1]; avt < argvp; avt++)
693: *avt = *(avt+1);
694: *argvp++ = buf;
695: }
696:
697: /*
698: * Duplicate last name, for TTYPE option, and null
699: * terminate the array. If we didn't find a match on
700: * our terminal name, put that name at the beginning.
701: */
702: cp = *(argvp-1);
703: *argvp++ = cp;
704: *argvp = 0;
705:
706: if (*argv == 0) {
707: if (name)
708: *argv = name;
709: else {
710: --argvp;
711: for (avt = argv; avt < argvp; avt++)
712: *avt = *(avt+1);
713: }
714: }
715: if (*argv)
716: return(argv);
717: else
718: return(unknown);
719: }
720:
721: int
722: is_unique(name, as, ae)
723: register char *name, **as, **ae;
724: {
725: register char **ap;
726: register int n;
727:
728: n = strlen(name) + 1;
729: for (ap = as; ap < ae; ap++)
730: if (strncasecmp(*ap, name, n) == 0)
731: return(0);
732: return (1);
733: }
734:
735: #ifdef TERMCAP
736: char termbuf[1024];
737:
738: /*ARGSUSED*/
739: int
740: setupterm(tname, fd, errp)
741: char *tname;
742: int fd, *errp;
743: {
744: if (tgetent(termbuf, tname) == 1) {
745: termbuf[1023] = '\0';
746: if (errp)
747: *errp = 1;
748: return(0);
749: }
750: if (errp)
751: *errp = 0;
752: return(-1);
753: }
754: #else
755: #define termbuf ttytype
756: extern char ttytype[];
757: #endif
758:
759: int resettermname = 1;
760:
761: char *
762: gettermname()
763: {
764: char *tname;
765: static char **tnamep = 0;
766: static char **next;
767: int err;
768:
769: if (resettermname) {
770: resettermname = 0;
771: if (tnamep && tnamep != unknown)
772: free(tnamep);
773: if ((tname = (char *)env_getvalue((unsigned char *)"TERM")) &&
774: (setupterm(tname, 1, &err) == 0)) {
775: tnamep = mklist(termbuf, tname);
776: } else {
777: if (tname && (strlen(tname) <= 40)) {
778: unknown[0] = tname;
779: upcase(tname);
780: } else
781: unknown[0] = name_unknown;
782: tnamep = unknown;
783: }
784: next = tnamep;
785: }
786: if (*next == 0)
787: next = tnamep;
788: return(*next++);
789: }
790: /*
791: * suboption()
792: *
793: * Look at the sub-option buffer, and try to be helpful to the other
794: * side.
795: *
796: * Currently we recognize:
797: *
798: * Terminal type, send request.
799: * Terminal speed (send request).
800: * Local flow control (is request).
801: * Linemode
802: */
803:
804: static void
805: suboption()
806: {
807: unsigned char subchar;
808:
809: printsub('<', subbuffer, SB_LEN()+2);
810: switch (subchar = SB_GET()) {
811: case TELOPT_TTYPE:
812: if (my_want_state_is_wont(TELOPT_TTYPE))
813: return;
814: if (SB_EOF() || SB_GET() != TELQUAL_SEND) {
815: return;
816: } else {
817: char *name;
818: unsigned char temp[50];
819: int len;
820:
821: #if defined(TN3270)
822: if (tn3270_ttype()) {
823: return;
824: }
825: #endif /* defined(TN3270) */
826: name = gettermname();
827: len = strlen(name) + 4 + 2;
828: if (len < NETROOM()) {
829: sprintf((char *)temp, "%c%c%c%c%s%c%c", IAC, SB, TELOPT_TTYPE,
830: TELQUAL_IS, name, IAC, SE);
831: ring_supply_data(&netoring, temp, len);
832: printsub('>', &temp[2], len-2);
833: } else {
834: ExitString("No room in buffer for terminal type.\n", 1);
835: /*NOTREACHED*/
836: }
837: }
838: break;
839: case TELOPT_TSPEED:
840: if (my_want_state_is_wont(TELOPT_TSPEED))
841: return;
842: if (SB_EOF())
843: return;
844: if (SB_GET() == TELQUAL_SEND) {
845: long ospeed, ispeed;
846: unsigned char temp[50];
847: int len;
848:
849: TerminalSpeeds(&ispeed, &ospeed);
850:
851: sprintf((char *)temp, "%c%c%c%c%d,%d%c%c", IAC, SB, TELOPT_TSPEED,
852: TELQUAL_IS, ospeed, ispeed, IAC, SE);
853: len = strlen((char *)temp+4) + 4; /* temp[3] is 0 ... */
854:
855: if (len < NETROOM()) {
856: ring_supply_data(&netoring, temp, len);
857: printsub('>', temp+2, len - 2);
858: }
859: /*@*/ else printf("lm_will: not enough room in buffer\n");
860: }
861: break;
862: case TELOPT_LFLOW:
863: if (my_want_state_is_wont(TELOPT_LFLOW))
864: return;
865: if (SB_EOF())
866: return;
867: switch(SB_GET()) {
868: case LFLOW_RESTART_ANY:
869: restartany = 1;
870: break;
871: case LFLOW_RESTART_XON:
872: restartany = 0;
873: break;
874: case LFLOW_ON:
875: localflow = 1;
876: break;
877: case LFLOW_OFF:
878: localflow = 0;
879: break;
880: default:
881: return;
882: }
883: setcommandmode();
884: setconnmode(0);
885: break;
886:
887: case TELOPT_LINEMODE:
888: if (my_want_state_is_wont(TELOPT_LINEMODE))
889: return;
890: if (SB_EOF())
891: return;
892: switch (SB_GET()) {
893: case WILL:
894: lm_will(subpointer, SB_LEN());
895: break;
896: case WONT:
897: lm_wont(subpointer, SB_LEN());
898: break;
899: case DO:
900: lm_do(subpointer, SB_LEN());
901: break;
902: case DONT:
903: lm_dont(subpointer, SB_LEN());
904: break;
905: case LM_SLC:
906: slc(subpointer, SB_LEN());
907: break;
908: case LM_MODE:
909: lm_mode(subpointer, SB_LEN(), 0);
910: break;
911: default:
912: break;
913: }
914: break;
915:
916: #ifdef OLD_ENVIRON
917: case TELOPT_OLD_ENVIRON:
918: #endif
919: case TELOPT_NEW_ENVIRON:
920: if (SB_EOF())
921: return;
922: switch(SB_PEEK()) {
923: case TELQUAL_IS:
924: case TELQUAL_INFO:
925: if (my_want_state_is_dont(subchar))
926: return;
927: break;
928: case TELQUAL_SEND:
929: if (my_want_state_is_wont(subchar)) {
930: return;
931: }
932: break;
933: default:
934: return;
935: }
936: env_opt(subpointer, SB_LEN());
937: break;
938:
939: case TELOPT_XDISPLOC:
940: if (my_want_state_is_wont(TELOPT_XDISPLOC))
941: return;
942: if (SB_EOF())
943: return;
944: if (SB_GET() == TELQUAL_SEND) {
945: unsigned char temp[50], *dp;
946: int len;
947:
948: if ((dp = env_getvalue((unsigned char *)"DISPLAY")) == NULL) {
949: /*
950: * Something happened, we no longer have a DISPLAY
951: * variable. So, turn off the option.
952: */
953: send_wont(TELOPT_XDISPLOC, 1);
954: break;
955: }
956: sprintf((char *)temp, "%c%c%c%c%s%c%c", IAC, SB, TELOPT_XDISPLOC,
957: TELQUAL_IS, dp, IAC, SE);
958: len = strlen((char *)temp+4) + 4; /* temp[3] is 0 ... */
959:
960: if (len < NETROOM()) {
961: ring_supply_data(&netoring, temp, len);
962: printsub('>', temp+2, len - 2);
963: }
964: /*@*/ else printf("lm_will: not enough room in buffer\n");
965: }
966: break;
967:
968: #if defined(AUTHENTICATION)
969: case TELOPT_AUTHENTICATION: {
970: if (!autologin)
971: break;
972: if (SB_EOF())
973: return;
974: switch(SB_GET()) {
975: case TELQUAL_IS:
976: if (my_want_state_is_dont(TELOPT_AUTHENTICATION))
977: return;
978: auth_is(subpointer, SB_LEN());
979: break;
980: case TELQUAL_SEND:
981: if (my_want_state_is_wont(TELOPT_AUTHENTICATION))
982: return;
983: auth_send(subpointer, SB_LEN());
984: break;
985: case TELQUAL_REPLY:
986: if (my_want_state_is_wont(TELOPT_AUTHENTICATION))
987: return;
988: auth_reply(subpointer, SB_LEN());
989: break;
990: case TELQUAL_NAME:
991: if (my_want_state_is_dont(TELOPT_AUTHENTICATION))
992: return;
993: auth_name(subpointer, SB_LEN());
994: break;
995: }
996: }
997: break;
998: #endif
999: default:
1000: break;
1001: }
1002: }
1003:
1004: static unsigned char str_lm[] = { IAC, SB, TELOPT_LINEMODE, 0, 0, IAC, SE };
1005:
1006: void
1007: lm_will(cmd, len)
1008: unsigned char *cmd;
1009: int len;
1010: {
1011: if (len < 1) {
1012: /*@*/ printf("lm_will: no command!!!\n"); /* Should not happen... */
1013: return;
1014: }
1015: switch(cmd[0]) {
1016: case LM_FORWARDMASK: /* We shouldn't ever get this... */
1017: default:
1018: str_lm[3] = DONT;
1019: str_lm[4] = cmd[0];
1020: if (NETROOM() > sizeof(str_lm)) {
1021: ring_supply_data(&netoring, str_lm, sizeof(str_lm));
1022: printsub('>', &str_lm[2], sizeof(str_lm)-2);
1023: }
1024: /*@*/ else printf("lm_will: not enough room in buffer\n");
1025: break;
1026: }
1027: }
1028:
1029: void
1030: lm_wont(cmd, len)
1031: unsigned char *cmd;
1032: int len;
1033: {
1034: if (len < 1) {
1035: /*@*/ printf("lm_wont: no command!!!\n"); /* Should not happen... */
1036: return;
1037: }
1038: switch(cmd[0]) {
1039: case LM_FORWARDMASK: /* We shouldn't ever get this... */
1040: default:
1041: /* We are always DONT, so don't respond */
1042: return;
1043: }
1044: }
1045:
1046: void
1047: lm_do(cmd, len)
1048: unsigned char *cmd;
1049: int len;
1050: {
1051: if (len < 1) {
1052: /*@*/ printf("lm_do: no command!!!\n"); /* Should not happen... */
1053: return;
1054: }
1055: switch(cmd[0]) {
1056: case LM_FORWARDMASK:
1057: default:
1058: str_lm[3] = WONT;
1059: str_lm[4] = cmd[0];
1060: if (NETROOM() > sizeof(str_lm)) {
1061: ring_supply_data(&netoring, str_lm, sizeof(str_lm));
1062: printsub('>', &str_lm[2], sizeof(str_lm)-2);
1063: }
1064: /*@*/ else printf("lm_do: not enough room in buffer\n");
1065: break;
1066: }
1067: }
1068:
1069: void
1070: lm_dont(cmd, len)
1071: unsigned char *cmd;
1072: int len;
1073: {
1074: if (len < 1) {
1075: /*@*/ printf("lm_dont: no command!!!\n"); /* Should not happen... */
1076: return;
1077: }
1078: switch(cmd[0]) {
1079: case LM_FORWARDMASK:
1080: default:
1081: /* we are always WONT, so don't respond */
1082: break;
1083: }
1084: }
1085:
1086: static unsigned char str_lm_mode[] = {
1087: IAC, SB, TELOPT_LINEMODE, LM_MODE, 0, IAC, SE
1088: };
1089:
1090: void
1091: lm_mode(cmd, len, init)
1092: unsigned char *cmd;
1093: int len, init;
1094: {
1095: if (len != 1)
1096: return;
1097: if ((linemode&MODE_MASK&~MODE_ACK) == *cmd)
1098: return;
1099: if (*cmd&MODE_ACK)
1100: return;
1101: linemode = *cmd&(MODE_MASK&~MODE_ACK);
1102: str_lm_mode[4] = linemode;
1103: if (!init)
1104: str_lm_mode[4] |= MODE_ACK;
1105: if (NETROOM() > sizeof(str_lm_mode)) {
1106: ring_supply_data(&netoring, str_lm_mode, sizeof(str_lm_mode));
1107: printsub('>', &str_lm_mode[2], sizeof(str_lm_mode)-2);
1108: }
1109: /*@*/ else printf("lm_mode: not enough room in buffer\n");
1110: setconnmode(0); /* set changed mode */
1111: }
1112:
1113:
1114:
1115: /*
1116: * slc()
1117: * Handle special character suboption of LINEMODE.
1118: */
1119:
1120: struct spc {
1121: cc_t val;
1122: cc_t *valp;
1123: char flags; /* Current flags & level */
1124: char mylevel; /* Maximum level & flags */
1125: } spc_data[NSLC+1];
1126:
1127: #define SLC_IMPORT 0
1128: #define SLC_EXPORT 1
1129: #define SLC_RVALUE 2
1130: static int slc_mode = SLC_EXPORT;
1131:
1132: void
1133: slc_init()
1134: {
1135: register struct spc *spcp;
1136:
1137: localchars = 1;
1138: for (spcp = spc_data; spcp < &spc_data[NSLC+1]; spcp++) {
1139: spcp->val = 0;
1140: spcp->valp = 0;
1141: spcp->flags = spcp->mylevel = SLC_NOSUPPORT;
1142: }
1143:
1144: #define initfunc(func, flags) { \
1145: spcp = &spc_data[func]; \
1146: if (spcp->valp = tcval(func)) { \
1147: spcp->val = *spcp->valp; \
1148: spcp->mylevel = SLC_VARIABLE|flags; \
1149: } else { \
1150: spcp->val = 0; \
1151: spcp->mylevel = SLC_DEFAULT; \
1152: } \
1153: }
1154:
1155: initfunc(SLC_SYNCH, 0);
1156: /* No BRK */
1157: initfunc(SLC_AO, 0);
1158: initfunc(SLC_AYT, 0);
1159: /* No EOR */
1160: initfunc(SLC_ABORT, SLC_FLUSHIN|SLC_FLUSHOUT);
1161: initfunc(SLC_EOF, 0);
1162: #ifndef SYSV_TERMIO
1163: initfunc(SLC_SUSP, SLC_FLUSHIN);
1164: #endif
1165: initfunc(SLC_EC, 0);
1166: initfunc(SLC_EL, 0);
1167: #ifndef SYSV_TERMIO
1168: initfunc(SLC_EW, 0);
1169: initfunc(SLC_RP, 0);
1170: initfunc(SLC_LNEXT, 0);
1171: #endif
1172: initfunc(SLC_XON, 0);
1173: initfunc(SLC_XOFF, 0);
1174: #ifdef SYSV_TERMIO
1175: spc_data[SLC_XON].mylevel = SLC_CANTCHANGE;
1176: spc_data[SLC_XOFF].mylevel = SLC_CANTCHANGE;
1177: #endif
1178: initfunc(SLC_FORW1, 0);
1179: #ifdef USE_TERMIO
1180: initfunc(SLC_FORW2, 0);
1181: /* No FORW2 */
1182: #endif
1183:
1184: initfunc(SLC_IP, SLC_FLUSHIN|SLC_FLUSHOUT);
1185: #undef initfunc
1186:
1187: if (slc_mode == SLC_EXPORT)
1188: slc_export();
1189: else
1190: slc_import(1);
1191:
1192: }
1193:
1194: void
1195: slcstate()
1196: {
1197: printf("Special characters are %s values\n",
1198: slc_mode == SLC_IMPORT ? "remote default" :
1199: slc_mode == SLC_EXPORT ? "local" :
1200: "remote");
1201: }
1202:
1203: void
1204: slc_mode_export()
1205: {
1206: slc_mode = SLC_EXPORT;
1207: if (my_state_is_will(TELOPT_LINEMODE))
1208: slc_export();
1209: }
1210:
1211: void
1212: slc_mode_import(def)
1213: int def;
1214: {
1215: slc_mode = def ? SLC_IMPORT : SLC_RVALUE;
1216: if (my_state_is_will(TELOPT_LINEMODE))
1217: slc_import(def);
1218: }
1219:
1220: unsigned char slc_import_val[] = {
1221: IAC, SB, TELOPT_LINEMODE, LM_SLC, 0, SLC_VARIABLE, 0, IAC, SE
1222: };
1223: unsigned char slc_import_def[] = {
1224: IAC, SB, TELOPT_LINEMODE, LM_SLC, 0, SLC_DEFAULT, 0, IAC, SE
1225: };
1226:
1227: void
1228: slc_import(def)
1229: int def;
1230: {
1231: if (NETROOM() > sizeof(slc_import_val)) {
1232: if (def) {
1233: ring_supply_data(&netoring, slc_import_def, sizeof(slc_import_def));
1234: printsub('>', &slc_import_def[2], sizeof(slc_import_def)-2);
1235: } else {
1236: ring_supply_data(&netoring, slc_import_val, sizeof(slc_import_val));
1237: printsub('>', &slc_import_val[2], sizeof(slc_import_val)-2);
1238: }
1239: }
1240: /*@*/ else printf("slc_import: not enough room\n");
1241: }
1242:
1243: void
1244: slc_export()
1245: {
1246: register struct spc *spcp;
1247:
1248: TerminalDefaultChars();
1249:
1250: slc_start_reply();
1251: for (spcp = &spc_data[1]; spcp < &spc_data[NSLC+1]; spcp++) {
1252: if (spcp->mylevel != SLC_NOSUPPORT) {
1253: if (spcp->val == (cc_t)(_POSIX_VDISABLE))
1254: spcp->flags = SLC_NOSUPPORT;
1255: else
1256: spcp->flags = spcp->mylevel;
1257: if (spcp->valp)
1258: spcp->val = *spcp->valp;
1259: slc_add_reply(spcp - spc_data, spcp->flags, spcp->val);
1260: }
1261: }
1262: slc_end_reply();
1263: (void)slc_update();
1264: setconnmode(1); /* Make sure the character values are set */
1265: }
1266:
1267: void
1268: slc(cp, len)
1269: register unsigned char *cp;
1270: int len;
1271: {
1272: register struct spc *spcp;
1273: register int func,level;
1274:
1275: slc_start_reply();
1276:
1277: for (; len >= 3; len -=3, cp +=3) {
1278:
1279: func = cp[SLC_FUNC];
1280:
1281: if (func == 0) {
1282: /*
1283: * Client side: always ignore 0 function.
1284: */
1285: continue;
1286: }
1287: if (func > NSLC) {
1288: if ((cp[SLC_FLAGS] & SLC_LEVELBITS) != SLC_NOSUPPORT)
1289: slc_add_reply(func, SLC_NOSUPPORT, 0);
1290: continue;
1291: }
1292:
1293: spcp = &spc_data[func];
1294:
1295: level = cp[SLC_FLAGS]&(SLC_LEVELBITS|SLC_ACK);
1296:
1297: if ((cp[SLC_VALUE] == (unsigned char)spcp->val) &&
1298: ((level&SLC_LEVELBITS) == (spcp->flags&SLC_LEVELBITS))) {
1299: continue;
1300: }
1301:
1302: if (level == (SLC_DEFAULT|SLC_ACK)) {
1303: /*
1304: * This is an error condition, the SLC_ACK
1305: * bit should never be set for the SLC_DEFAULT
1306: * level. Our best guess to recover is to
1307: * ignore the SLC_ACK bit.
1308: */
1309: cp[SLC_FLAGS] &= ~SLC_ACK;
1310: }
1311:
1312: if (level == ((spcp->flags&SLC_LEVELBITS)|SLC_ACK)) {
1313: spcp->val = (cc_t)cp[SLC_VALUE];
1314: spcp->flags = cp[SLC_FLAGS]; /* include SLC_ACK */
1315: continue;
1316: }
1317:
1318: level &= ~SLC_ACK;
1319:
1320: if (level <= (spcp->mylevel&SLC_LEVELBITS)) {
1321: spcp->flags = cp[SLC_FLAGS]|SLC_ACK;
1322: spcp->val = (cc_t)cp[SLC_VALUE];
1323: }
1324: if (level == SLC_DEFAULT) {
1325: if ((spcp->mylevel&SLC_LEVELBITS) != SLC_DEFAULT)
1326: spcp->flags = spcp->mylevel;
1327: else
1328: spcp->flags = SLC_NOSUPPORT;
1329: }
1330: slc_add_reply(func, spcp->flags, spcp->val);
1331: }
1332: slc_end_reply();
1333: if (slc_update())
1334: setconnmode(1); /* set the new character values */
1335: }
1336:
1337: void
1338: slc_check()
1339: {
1340: register struct spc *spcp;
1341:
1342: slc_start_reply();
1343: for (spcp = &spc_data[1]; spcp < &spc_data[NSLC+1]; spcp++) {
1344: if (spcp->valp && spcp->val != *spcp->valp) {
1345: spcp->val = *spcp->valp;
1346: if (spcp->val == (cc_t)(_POSIX_VDISABLE))
1347: spcp->flags = SLC_NOSUPPORT;
1348: else
1349: spcp->flags = spcp->mylevel;
1350: slc_add_reply(spcp - spc_data, spcp->flags, spcp->val);
1351: }
1352: }
1353: slc_end_reply();
1354: setconnmode(1);
1355: }
1356:
1357:
1358: unsigned char slc_reply[128];
1359: unsigned char *slc_replyp;
1360:
1361: void
1362: slc_start_reply()
1363: {
1364: slc_replyp = slc_reply;
1365: *slc_replyp++ = IAC;
1366: *slc_replyp++ = SB;
1367: *slc_replyp++ = TELOPT_LINEMODE;
1368: *slc_replyp++ = LM_SLC;
1369: }
1370:
1371: void
1372: slc_add_reply(func, flags, value)
1373: unsigned char func;
1374: unsigned char flags;
1375: cc_t value;
1376: {
1377: if ((*slc_replyp++ = func) == IAC)
1378: *slc_replyp++ = IAC;
1379: if ((*slc_replyp++ = flags) == IAC)
1380: *slc_replyp++ = IAC;
1381: if ((*slc_replyp++ = (unsigned char)value) == IAC)
1382: *slc_replyp++ = IAC;
1383: }
1384:
1385: void
1386: slc_end_reply()
1387: {
1388: register int len;
1389:
1390: *slc_replyp++ = IAC;
1391: *slc_replyp++ = SE;
1392: len = slc_replyp - slc_reply;
1393: if (len <= 6)
1394: return;
1395: if (NETROOM() > len) {
1396: ring_supply_data(&netoring, slc_reply, slc_replyp - slc_reply);
1397: printsub('>', &slc_reply[2], slc_replyp - slc_reply - 2);
1398: }
1399: /*@*/else printf("slc_end_reply: not enough room\n");
1400: }
1401:
1402: int
1403: slc_update()
1404: {
1405: register struct spc *spcp;
1406: int need_update = 0;
1407:
1408: for (spcp = &spc_data[1]; spcp < &spc_data[NSLC+1]; spcp++) {
1409: if (!(spcp->flags&SLC_ACK))
1410: continue;
1411: spcp->flags &= ~SLC_ACK;
1412: if (spcp->valp && (*spcp->valp != spcp->val)) {
1413: *spcp->valp = spcp->val;
1414: need_update = 1;
1415: }
1416: }
1417: return(need_update);
1418: }
1419:
1420: #ifdef OLD_ENVIRON
1421: # ifdef ENV_HACK
1422: /*
1423: * Earlier version of telnet/telnetd from the BSD code had
1424: * the definitions of VALUE and VAR reversed. To ensure
1425: * maximum interoperability, we assume that the server is
1426: * an older BSD server, until proven otherwise. The newer
1427: * BSD servers should be able to handle either definition,
1428: * so it is better to use the wrong values if we don't
1429: * know what type of server it is.
1430: */
1431: int env_auto = 1;
1432: int old_env_var = OLD_ENV_VAR;
1433: int old_env_value = OLD_ENV_VALUE;
1434: # else
1435: # define old_env_var OLD_ENV_VAR
1436: # define old_env_value OLD_ENV_VALUE
1437: # endif
1438: #endif
1439:
1440: void
1441: env_opt(buf, len)
1442: register unsigned char *buf;
1443: register int len;
1444: {
1445: register unsigned char *ep = 0, *epc = 0;
1446: register int i;
1447:
1448: switch(buf[0]&0xff) {
1449: case TELQUAL_SEND:
1450: env_opt_start();
1451: if (len == 1) {
1452: env_opt_add(NULL);
1453: } else for (i = 1; i < len; i++) {
1454: switch (buf[i]&0xff) {
1455: #ifdef OLD_ENVIRON
1456: case OLD_ENV_VAR:
1457: # ifdef ENV_HACK
1458: if (telopt_environ == TELOPT_OLD_ENVIRON
1459: && env_auto) {
1460: /* Server has the same definitions */
1461: old_env_var = OLD_ENV_VAR;
1462: old_env_value = OLD_ENV_VALUE;
1463: }
1464: /* FALL THROUGH */
1465: # endif
1466: case OLD_ENV_VALUE:
1467: /*
1468: * Although OLD_ENV_VALUE is not legal, we will
1469: * still recognize it, just in case it is an
1470: * old server that has VAR & VALUE mixed up...
1471: */
1472: /* FALL THROUGH */
1473: #else
1474: case NEW_ENV_VAR:
1475: #endif
1476: case ENV_USERVAR:
1477: if (ep) {
1478: *epc = 0;
1479: env_opt_add(ep);
1480: }
1481: ep = epc = &buf[i+1];
1482: break;
1483: case ENV_ESC:
1484: i++;
1485: /*FALL THROUGH*/
1486: default:
1487: if (epc)
1488: *epc++ = buf[i];
1489: break;
1490: }
1491: }
1492: if (ep) {
1493: *epc = 0;
1494: env_opt_add(ep);
1495: }
1496: env_opt_end(1);
1497: break;
1498:
1499: case TELQUAL_IS:
1500: case TELQUAL_INFO:
1501: /* Ignore for now. We shouldn't get it anyway. */
1502: break;
1503:
1504: default:
1505: break;
1506: }
1507: }
1508:
1509: #define OPT_REPLY_SIZE 256
1510: unsigned char *opt_reply;
1511: unsigned char *opt_replyp;
1512: unsigned char *opt_replyend;
1513:
1514: void
1515: env_opt_start()
1516: {
1517: if (opt_reply)
1518: opt_reply = (unsigned char *)realloc(opt_reply, OPT_REPLY_SIZE);
1519: else
1520: opt_reply = (unsigned char *)malloc(OPT_REPLY_SIZE);
1521: if (opt_reply == NULL) {
1522: /*@*/ printf("env_opt_start: malloc()/realloc() failed!!!\n");
1523: opt_reply = opt_replyp = opt_replyend = NULL;
1524: return;
1525: }
1526: opt_replyp = opt_reply;
1527: opt_replyend = opt_reply + OPT_REPLY_SIZE;
1528: *opt_replyp++ = IAC;
1529: *opt_replyp++ = SB;
1530: *opt_replyp++ = telopt_environ;
1531: *opt_replyp++ = TELQUAL_IS;
1532: }
1533:
1534: void
1535: env_opt_start_info()
1536: {
1537: env_opt_start();
1538: if (opt_replyp)
1539: opt_replyp[-1] = TELQUAL_INFO;
1540: }
1541:
1542: void
1543: env_opt_add(ep)
1544: register unsigned char *ep;
1545: {
1546: register unsigned char *vp, c;
1547:
1548: if (opt_reply == NULL) /*XXX*/
1549: return; /*XXX*/
1550:
1551: if (ep == NULL || *ep == '\0') {
1552: /* Send user defined variables first. */
1553: env_default(1, 0);
1554: while (ep = env_default(0, 0))
1555: env_opt_add(ep);
1556:
1557: /* Now add the list of well know variables. */
1558: env_default(1, 1);
1559: while (ep = env_default(0, 1))
1560: env_opt_add(ep);
1561: return;
1562: }
1563: vp = env_getvalue(ep);
1564: if (opt_replyp + (vp ? strlen((char *)vp) : 0) +
1565: strlen((char *)ep) + 6 > opt_replyend)
1566: {
1567: register int len;
1568: opt_replyend += OPT_REPLY_SIZE;
1569: len = opt_replyend - opt_reply;
1570: opt_reply = (unsigned char *)realloc(opt_reply, len);
1571: if (opt_reply == NULL) {
1572: /*@*/ printf("env_opt_add: realloc() failed!!!\n");
1573: opt_reply = opt_replyp = opt_replyend = NULL;
1574: return;
1575: }
1576: opt_replyp = opt_reply + len - (opt_replyend - opt_replyp);
1577: opt_replyend = opt_reply + len;
1578: }
1579: if (opt_welldefined(ep))
1580: #ifdef OLD_ENVIRON
1581: if (telopt_environ == TELOPT_OLD_ENVIRON)
1582: *opt_replyp++ = old_env_var;
1583: else
1584: #endif
1585: *opt_replyp++ = NEW_ENV_VAR;
1586: else
1587: *opt_replyp++ = ENV_USERVAR;
1588: for (;;) {
1589: while (c = *ep++) {
1590: switch(c&0xff) {
1591: case IAC:
1592: *opt_replyp++ = IAC;
1593: break;
1594: case NEW_ENV_VAR:
1595: case NEW_ENV_VALUE:
1596: case ENV_ESC:
1597: case ENV_USERVAR:
1598: *opt_replyp++ = ENV_ESC;
1599: break;
1600: }
1601: *opt_replyp++ = c;
1602: }
1603: if (ep = vp) {
1604: #ifdef OLD_ENVIRON
1605: if (telopt_environ == TELOPT_OLD_ENVIRON)
1606: *opt_replyp++ = old_env_value;
1607: else
1608: #endif
1609: *opt_replyp++ = NEW_ENV_VALUE;
1610: vp = NULL;
1611: } else
1612: break;
1613: }
1614: }
1615:
1616: int
1617: opt_welldefined(ep)
1618: char *ep;
1619: {
1620: if ((strcmp(ep, "USER") == 0) ||
1621: (strcmp(ep, "DISPLAY") == 0) ||
1622: (strcmp(ep, "PRINTER") == 0) ||
1623: (strcmp(ep, "SYSTEMTYPE") == 0) ||
1624: (strcmp(ep, "JOB") == 0) ||
1625: (strcmp(ep, "ACCT") == 0))
1626: return(1);
1627: return(0);
1628: }
1629: void
1630: env_opt_end(emptyok)
1631: register int emptyok;
1632: {
1633: register int len;
1634:
1635: len = opt_replyp - opt_reply + 2;
1636: if (emptyok || len > 6) {
1637: *opt_replyp++ = IAC;
1638: *opt_replyp++ = SE;
1639: if (NETROOM() > len) {
1640: ring_supply_data(&netoring, opt_reply, len);
1641: printsub('>', &opt_reply[2], len - 2);
1642: }
1643: /*@*/ else printf("slc_end_reply: not enough room\n");
1644: }
1645: if (opt_reply) {
1646: free(opt_reply);
1647: opt_reply = opt_replyp = opt_replyend = NULL;
1648: }
1649: }
1650:
1651:
1652:
1653: int
1654: telrcv()
1655: {
1656: register int c;
1657: register int scc;
1658: register unsigned char *sbp;
1659: int count;
1660: int returnValue = 0;
1661:
1662: scc = 0;
1663: count = 0;
1664: while (TTYROOM() > 2) {
1665: if (scc == 0) {
1666: if (count) {
1667: ring_consumed(&netiring, count);
1668: returnValue = 1;
1669: count = 0;
1670: }
1671: sbp = netiring.consume;
1672: scc = ring_full_consecutive(&netiring);
1673: if (scc == 0) {
1674: /* No more data coming in */
1675: break;
1676: }
1677: }
1678:
1679: c = *sbp++ & 0xff, scc--; count++;
1680:
1681: switch (telrcv_state) {
1682:
1683: case TS_CR:
1684: telrcv_state = TS_DATA;
1685: if (c == '\0') {
1686: break; /* Ignore \0 after CR */
1687: }
1688: else if ((c == '\n') && my_want_state_is_dont(TELOPT_ECHO) && !crmod) {
1689: TTYADD(c);
1690: break;
1691: }
1692: /* Else, fall through */
1693:
1694: case TS_DATA:
1695: if (c == IAC) {
1696: telrcv_state = TS_IAC;
1697: break;
1698: }
1699: # if defined(TN3270)
1700: if (In3270) {
1701: *Ifrontp++ = c;
1702: while (scc > 0) {
1703: c = *sbp++ & 0377, scc--; count++;
1704: if (c == IAC) {
1705: telrcv_state = TS_IAC;
1706: break;
1707: }
1708: *Ifrontp++ = c;
1709: }
1710: } else
1711: # endif /* defined(TN3270) */
1712: /*
1713: * The 'crmod' hack (see following) is needed
1714: * since we can't * set CRMOD on output only.
1715: * Machines like MULTICS like to send \r without
1716: * \n; since we must turn off CRMOD to get proper
1717: * input, the mapping is done here (sigh).
1718: */
1719: if ((c == '\r') && my_want_state_is_dont(TELOPT_BINARY)) {
1720: if (scc > 0) {
1721: c = *sbp&0xff;
1722: if (c == 0) {
1723: sbp++, scc--; count++;
1724: /* a "true" CR */
1725: TTYADD('\r');
1726: } else if (my_want_state_is_dont(TELOPT_ECHO) &&
1727: (c == '\n')) {
1728: sbp++, scc--; count++;
1729: TTYADD('\n');
1730: } else {
1731:
1732: TTYADD('\r');
1733: if (crmod) {
1734: TTYADD('\n');
1735: }
1736: }
1737: } else {
1738: telrcv_state = TS_CR;
1739: TTYADD('\r');
1740: if (crmod) {
1741: TTYADD('\n');
1742: }
1743: }
1744: } else {
1745: TTYADD(c);
1746: }
1747: continue;
1748:
1749: case TS_IAC:
1750: process_iac:
1751: switch (c) {
1752:
1753: case WILL:
1754: telrcv_state = TS_WILL;
1755: continue;
1756:
1757: case WONT:
1758: telrcv_state = TS_WONT;
1759: continue;
1760:
1761: case DO:
1762: telrcv_state = TS_DO;
1763: continue;
1764:
1765: case DONT:
1766: telrcv_state = TS_DONT;
1767: continue;
1768:
1769: case DM:
1770: /*
1771: * We may have missed an urgent notification,
1772: * so make sure we flush whatever is in the
1773: * buffer currently.
1774: */
1775: printoption("RCVD", IAC, DM);
1776: SYNCHing = 1;
1777: (void) ttyflush(1);
1778: SYNCHing = stilloob();
1779: settimer(gotDM);
1780: break;
1781:
1782: case SB:
1783: SB_CLEAR();
1784: telrcv_state = TS_SB;
1785: continue;
1786:
1787: # if defined(TN3270)
1788: case EOR:
1789: if (In3270) {
1790: if (Ibackp == Ifrontp) {
1791: Ibackp = Ifrontp = Ibuf;
1792: ISend = 0; /* should have been! */
1793: } else {
1794: Ibackp += DataFromNetwork(Ibackp, Ifrontp-Ibackp, 1);
1795: ISend = 1;
1796: }
1797: }
1798: printoption("RCVD", IAC, EOR);
1799: break;
1800: # endif /* defined(TN3270) */
1801:
1802: case IAC:
1803: # if !defined(TN3270)
1804: TTYADD(IAC);
1805: # else /* !defined(TN3270) */
1806: if (In3270) {
1807: *Ifrontp++ = IAC;
1808: } else {
1809: TTYADD(IAC);
1810: }
1811: # endif /* !defined(TN3270) */
1812: break;
1813:
1814: case NOP:
1815: case GA:
1816: default:
1817: printoption("RCVD", IAC, c);
1818: break;
1819: }
1820: telrcv_state = TS_DATA;
1821: continue;
1822:
1823: case TS_WILL:
1824: printoption("RCVD", WILL, c);
1825: willoption(c);
1826: SetIn3270();
1827: telrcv_state = TS_DATA;
1828: continue;
1829:
1830: case TS_WONT:
1831: printoption("RCVD", WONT, c);
1832: wontoption(c);
1833: SetIn3270();
1834: telrcv_state = TS_DATA;
1835: continue;
1836:
1837: case TS_DO:
1838: printoption("RCVD", DO, c);
1839: dooption(c);
1840: SetIn3270();
1841: if (c == TELOPT_NAWS) {
1842: sendnaws();
1843: } else if (c == TELOPT_LFLOW) {
1844: localflow = 1;
1845: setcommandmode();
1846: setconnmode(0);
1847: }
1848: telrcv_state = TS_DATA;
1849: continue;
1850:
1851: case TS_DONT:
1852: printoption("RCVD", DONT, c);
1853: dontoption(c);
1854: flushline = 1;
1855: setconnmode(0); /* set new tty mode (maybe) */
1856: SetIn3270();
1857: telrcv_state = TS_DATA;
1858: continue;
1859:
1860: case TS_SB:
1861: if (c == IAC) {
1862: telrcv_state = TS_SE;
1863: } else {
1864: SB_ACCUM(c);
1865: }
1866: continue;
1867:
1868: case TS_SE:
1869: if (c != SE) {
1870: if (c != IAC) {
1871: /*
1872: * This is an error. We only expect to get
1873: * "IAC IAC" or "IAC SE". Several things may
1874: * have happend. An IAC was not doubled, the
1875: * IAC SE was left off, or another option got
1876: * inserted into the suboption are all possibilities.
1877: * If we assume that the IAC was not doubled,
1878: * and really the IAC SE was left off, we could
1879: * get into an infinate loop here. So, instead,
1880: * we terminate the suboption, and process the
1881: * partial suboption if we can.
1882: */
1883: SB_ACCUM(IAC);
1884: SB_ACCUM(c);
1885: subpointer -= 2;
1886: SB_TERM();
1887:
1888: printoption("In SUBOPTION processing, RCVD", IAC, c);
1889: suboption(); /* handle sub-option */
1890: SetIn3270();
1891: telrcv_state = TS_IAC;
1892: goto process_iac;
1893: }
1894: SB_ACCUM(c);
1895: telrcv_state = TS_SB;
1896: } else {
1897: SB_ACCUM(IAC);
1898: SB_ACCUM(SE);
1899: subpointer -= 2;
1900: SB_TERM();
1901: suboption(); /* handle sub-option */
1902: SetIn3270();
1903: telrcv_state = TS_DATA;
1904: }
1905: }
1906: }
1907: if (count)
1908: ring_consumed(&netiring, count);
1909: return returnValue||count;
1910: }
1911:
1912: static int bol = 1, local = 0;
1913:
1914: int
1915: rlogin_susp()
1916: {
1917: if (local) {
1918: local = 0;
1919: bol = 1;
1920: command(0, "z\n", 2);
1921: return(1);
1922: }
1923: return(0);
1924: }
1925:
1926: static int
1927: telsnd()
1928: {
1929: int tcc;
1930: int count;
1931: int returnValue = 0;
1932: unsigned char *tbp;
1933:
1934: tcc = 0;
1935: count = 0;
1936: while (NETROOM() > 2) {
1937: register int sc;
1938: register int c;
1939:
1940: if (tcc == 0) {
1941: if (count) {
1942: ring_consumed(&ttyiring, count);
1943: returnValue = 1;
1944: count = 0;
1945: }
1946: tbp = ttyiring.consume;
1947: tcc = ring_full_consecutive(&ttyiring);
1948: if (tcc == 0) {
1949: break;
1950: }
1951: }
1952: c = *tbp++ & 0xff, sc = strip(c), tcc--; count++;
1953: if (rlogin != _POSIX_VDISABLE) {
1954: if (bol) {
1955: bol = 0;
1956: if (sc == rlogin) {
1957: local = 1;
1958: continue;
1959: }
1960: } else if (local) {
1961: local = 0;
1962: if (sc == '.' || c == termEofChar) {
1963: bol = 1;
1964: command(0, "close\n", 6);
1965: continue;
1966: }
1967: if (sc == termSuspChar) {
1968: bol = 1;
1969: command(0, "z\n", 2);
1970: continue;
1971: }
1972: if (sc == escape) {
1973: command(0, (char *)tbp, tcc);
1974: bol = 1;
1975: count += tcc;
1976: tcc = 0;
1977: flushline = 1;
1978: break;
1979: }
1980: if (sc != rlogin) {
1981: ++tcc;
1982: --tbp;
1983: --count;
1984: c = sc = rlogin;
1985: }
1986: }
1987: if ((sc == '\n') || (sc == '\r'))
1988: bol = 1;
1989: } else if (sc == escape) {
1990: /*
1991: * Double escape is a pass through of a single escape character.
1992: */
1993: if (tcc && strip(*tbp) == escape) {
1994: tbp++;
1995: tcc--;
1996: count++;
1997: bol = 0;
1998: } else {
1999: command(0, (char *)tbp, tcc);
2000: bol = 1;
2001: count += tcc;
2002: tcc = 0;
2003: flushline = 1;
2004: break;
2005: }
2006: } else
2007: bol = 0;
2008: #ifdef KLUDGELINEMODE
2009: if (kludgelinemode && (globalmode&MODE_EDIT) && (sc == echoc)) {
2010: if (tcc > 0 && strip(*tbp) == echoc) {
2011: tcc--; tbp++; count++;
2012: } else {
2013: dontlecho = !dontlecho;
2014: settimer(echotoggle);
2015: setconnmode(0);
2016: flushline = 1;
2017: break;
2018: }
2019: }
2020: #endif
2021: if (MODE_LOCAL_CHARS(globalmode)) {
2022: if (TerminalSpecialChars(sc) == 0) {
2023: bol = 1;
2024: break;
2025: }
2026: }
2027: if (my_want_state_is_wont(TELOPT_BINARY)) {
2028: switch (c) {
2029: case '\n':
2030: /*
2031: * If we are in CRMOD mode (\r ==> \n)
2032: * on our local machine, then probably
2033: * a newline (unix) is CRLF (TELNET).
2034: */
2035: if (MODE_LOCAL_CHARS(globalmode)) {
2036: NETADD('\r');
2037: }
2038: NETADD('\n');
2039: bol = flushline = 1;
2040: break;
2041: case '\r':
2042: if (!crlf) {
2043: NET2ADD('\r', '\0');
2044: } else {
2045: NET2ADD('\r', '\n');
2046: }
2047: bol = flushline = 1;
2048: break;
2049: case IAC:
2050: NET2ADD(IAC, IAC);
2051: break;
2052: default:
2053: NETADD(c);
2054: break;
2055: }
2056: } else if (c == IAC) {
2057: NET2ADD(IAC, IAC);
2058: } else {
2059: NETADD(c);
2060: }
2061: }
2062: if (count)
2063: ring_consumed(&ttyiring, count);
2064: return returnValue||count; /* Non-zero if we did anything */
2065: }
2066:
2067: /*
2068: * Scheduler()
2069: *
2070: * Try to do something.
2071: *
2072: * If we do something useful, return 1; else return 0.
2073: *
2074: */
2075:
2076:
2077: int
2078: Scheduler(block)
2079: int block; /* should we block in the select ? */
2080: {
2081: /* One wants to be a bit careful about setting returnValue
2082: * to one, since a one implies we did some useful work,
2083: * and therefore probably won't be called to block next
2084: * time (TN3270 mode only).
2085: */
2086: int returnValue;
2087: int netin, netout, netex, ttyin, ttyout;
2088:
2089: /* Decide which rings should be processed */
2090:
2091: netout = ring_full_count(&netoring) &&
2092: (flushline ||
2093: (my_want_state_is_wont(TELOPT_LINEMODE)
2094: #ifdef KLUDGELINEMODE
2095: && (!kludgelinemode || my_want_state_is_do(TELOPT_SGA))
2096: #endif
2097: ) ||
2098: my_want_state_is_will(TELOPT_BINARY));
2099: ttyout = ring_full_count(&ttyoring);
2100:
2101: #if defined(TN3270)
2102: ttyin = ring_empty_count(&ttyiring) && (clienteof == 0) && (shell_active == 0);
2103: #else /* defined(TN3270) */
2104: ttyin = ring_empty_count(&ttyiring) && (clienteof == 0);
2105: #endif /* defined(TN3270) */
2106:
2107: #if defined(TN3270)
2108: netin = ring_empty_count(&netiring);
2109: # else /* !defined(TN3270) */
2110: netin = !ISend && ring_empty_count(&netiring);
2111: # endif /* !defined(TN3270) */
2112:
2113: netex = !SYNCHing;
2114:
2115: /* If we have seen a signal recently, reset things */
2116: # if defined(TN3270) && defined(unix)
2117: if (HaveInput) {
2118: HaveInput = 0;
2119: (void) signal(SIGIO, inputAvailable);
2120: }
2121: #endif /* defined(TN3270) && defined(unix) */
2122:
2123: /* Call to system code to process rings */
2124:
2125: returnValue = process_rings(netin, netout, netex, ttyin, ttyout, !block);
2126:
2127: /* Now, look at the input rings, looking for work to do. */
2128:
2129: if (ring_full_count(&ttyiring)) {
2130: # if defined(TN3270)
2131: if (In3270) {
2132: int c;
2133:
2134: c = DataFromTerminal(ttyiring.consume,
2135: ring_full_consecutive(&ttyiring));
2136: if (c) {
2137: returnValue = 1;
2138: ring_consumed(&ttyiring, c);
2139: }
2140: } else {
2141: # endif /* defined(TN3270) */
2142: returnValue |= telsnd();
2143: # if defined(TN3270)
2144: }
2145: # endif /* defined(TN3270) */
2146: }
2147:
2148: if (ring_full_count(&netiring)) {
2149: # if !defined(TN3270)
2150: returnValue |= telrcv();
2151: # else /* !defined(TN3270) */
2152: returnValue = Push3270();
2153: # endif /* !defined(TN3270) */
2154: }
2155: return returnValue;
2156: }
2157:
2158: /*
2159: * Select from tty and network...
2160: */
2161: void
2162: telnet(user)
2163: char *user;
2164: {
2165: sys_telnet_init();
2166:
2167: #if defined(AUTHENTICATION)
2168: {
2169: static char local_host[256] = { 0 };
2170:
2171: if (!local_host[0]) {
2172: gethostname(local_host, sizeof(local_host));
2173: local_host[sizeof(local_host)-1] = 0;
2174: }
2175: auth_encrypt_init(local_host, hostname, "TELNET", 0);
2176: auth_encrypt_user(user);
2177: }
2178: #endif /* defined(AUTHENTICATION) */
2179: # if !defined(TN3270)
2180: if (telnetport) {
2181: #if defined(AUTHENTICATION)
2182: if (autologin)
2183: send_will(TELOPT_AUTHENTICATION, 1);
2184: #endif
2185: send_do(TELOPT_SGA, 1);
2186: send_will(TELOPT_TTYPE, 1);
2187: send_will(TELOPT_NAWS, 1);
2188: send_will(TELOPT_TSPEED, 1);
2189: send_will(TELOPT_LFLOW, 1);
2190: send_will(TELOPT_LINEMODE, 1);
2191: send_will(TELOPT_NEW_ENVIRON, 1);
2192: send_do(TELOPT_STATUS, 1);
2193: if (env_getvalue((unsigned char *)"DISPLAY"))
2194: send_will(TELOPT_XDISPLOC, 1);
2195: if (eight)
2196: tel_enter_binary(eight);
2197: }
2198: # endif /* !defined(TN3270) */
2199:
2200: # if !defined(TN3270)
2201: for (;;) {
2202: int schedValue;
2203:
2204: while ((schedValue = Scheduler(0)) != 0) {
2205: if (schedValue == -1) {
2206: setcommandmode();
2207: return;
2208: }
2209: }
2210:
2211: if (Scheduler(1) == -1) {
2212: setcommandmode();
2213: return;
2214: }
2215: }
2216: # else /* !defined(TN3270) */
2217: for (;;) {
2218: int schedValue;
2219:
2220: while (!In3270 && !shell_active) {
2221: if (Scheduler(1) == -1) {
2222: setcommandmode();
2223: return;
2224: }
2225: }
2226:
2227: while ((schedValue = Scheduler(0)) != 0) {
2228: if (schedValue == -1) {
2229: setcommandmode();
2230: return;
2231: }
2232: }
2233: /* If there is data waiting to go out to terminal, don't
2234: * schedule any more data for the terminal.
2235: */
2236: if (ring_full_count(&ttyoring)) {
2237: schedValue = 1;
2238: } else {
2239: if (shell_active) {
2240: if (shell_continue() == 0) {
2241: ConnectScreen();
2242: }
2243: } else if (In3270) {
2244: schedValue = DoTerminalOutput();
2245: }
2246: }
2247: if (schedValue && (shell_active == 0)) {
2248: if (Scheduler(1) == -1) {
2249: setcommandmode();
2250: return;
2251: }
2252: }
2253: }
2254: # endif /* !defined(TN3270) */
2255: }
2256:
2257: #if 0 /* XXX - this not being in is a bug */
2258: /*
2259: * nextitem()
2260: *
2261: * Return the address of the next "item" in the TELNET data
2262: * stream. This will be the address of the next character if
2263: * the current address is a user data character, or it will
2264: * be the address of the character following the TELNET command
2265: * if the current address is a TELNET IAC ("I Am a Command")
2266: * character.
2267: */
2268:
2269: static char *
2270: nextitem(current)
2271: char *current;
2272: {
2273: if ((*current&0xff) != IAC) {
2274: return current+1;
2275: }
2276: switch (*(current+1)&0xff) {
2277: case DO:
2278: case DONT:
2279: case WILL:
2280: case WONT:
2281: return current+3;
2282: case SB: /* loop forever looking for the SE */
2283: {
2284: register char *look = current+2;
2285:
2286: for (;;) {
2287: if ((*look++&0xff) == IAC) {
2288: if ((*look++&0xff) == SE) {
2289: return look;
2290: }
2291: }
2292: }
2293: }
2294: default:
2295: return current+2;
2296: }
2297: }
2298: #endif /* 0 */
2299:
2300: /*
2301: * netclear()
2302: *
2303: * We are about to do a TELNET SYNCH operation. Clear
2304: * the path to the network.
2305: *
2306: * Things are a bit tricky since we may have sent the first
2307: * byte or so of a previous TELNET command into the network.
2308: * So, we have to scan the network buffer from the beginning
2309: * until we are up to where we want to be.
2310: *
2311: * A side effect of what we do, just to keep things
2312: * simple, is to clear the urgent data pointer. The principal
2313: * caller should be setting the urgent data pointer AFTER calling
2314: * us in any case.
2315: */
2316:
2317: static void
2318: netclear()
2319: {
2320: #if 0 /* XXX */
2321: register char *thisitem, *next;
2322: char *good;
2323: #define wewant(p) ((nfrontp > p) && ((*p&0xff) == IAC) && \
2324: ((*(p+1)&0xff) != EC) && ((*(p+1)&0xff) != EL))
2325:
2326: thisitem = netobuf;
2327:
2328: while ((next = nextitem(thisitem)) <= netobuf.send) {
2329: thisitem = next;
2330: }
2331:
2332: /* Now, thisitem is first before/at boundary. */
2333:
2334: good = netobuf; /* where the good bytes go */
2335:
2336: while (netoring.add > thisitem) {
2337: if (wewant(thisitem)) {
2338: int length;
2339:
2340: next = thisitem;
2341: do {
2342: next = nextitem(next);
2343: } while (wewant(next) && (nfrontp > next));
2344: length = next-thisitem;
2345: memcpy(good, thisitem, length);
2346: good += length;
2347: thisitem = next;
2348: } else {
2349: thisitem = nextitem(thisitem);
2350: }
2351: }
2352:
2353: #endif /* 0 */
2354: }
2355:
2356: /*
2357: * These routines add various telnet commands to the data stream.
2358: */
2359:
2360: static void
2361: doflush()
2362: {
2363: NET2ADD(IAC, DO);
2364: NETADD(TELOPT_TM);
2365: flushline = 1;
2366: flushout = 1;
2367: (void) ttyflush(1); /* Flush/drop output */
2368: /* do printoption AFTER flush, otherwise the output gets tossed... */
2369: printoption("SENT", DO, TELOPT_TM);
2370: }
2371:
2372: void
2373: xmitAO()
2374: {
2375: NET2ADD(IAC, AO);
2376: printoption("SENT", IAC, AO);
2377: if (autoflush) {
2378: doflush();
2379: }
2380: }
2381:
2382:
2383: void
2384: xmitEL()
2385: {
2386: NET2ADD(IAC, EL);
2387: printoption("SENT", IAC, EL);
2388: }
2389:
2390: void
2391: xmitEC()
2392: {
2393: NET2ADD(IAC, EC);
2394: printoption("SENT", IAC, EC);
2395: }
2396:
2397:
2398: int
2399: dosynch()
2400: {
2401: netclear(); /* clear the path to the network */
2402: NETADD(IAC);
2403: setneturg();
2404: NETADD(DM);
2405: printoption("SENT", IAC, DM);
2406: return 1;
2407: }
2408:
2409: int want_status_response = 0;
2410:
2411: int
2412: get_status()
2413: {
2414: unsigned char tmp[16];
2415: register unsigned char *cp;
2416:
2417: if (my_want_state_is_dont(TELOPT_STATUS)) {
2418: printf("Remote side does not support STATUS option\n");
2419: return 0;
2420: }
2421: cp = tmp;
2422:
2423: *cp++ = IAC;
2424: *cp++ = SB;
2425: *cp++ = TELOPT_STATUS;
2426: *cp++ = TELQUAL_SEND;
2427: *cp++ = IAC;
2428: *cp++ = SE;
2429: if (NETROOM() >= cp - tmp) {
2430: ring_supply_data(&netoring, tmp, cp-tmp);
2431: printsub('>', tmp+2, cp - tmp - 2);
2432: }
2433: ++want_status_response;
2434: return 1;
2435: }
2436:
2437: void
2438: intp()
2439: {
2440: NET2ADD(IAC, IP);
2441: printoption("SENT", IAC, IP);
2442: flushline = 1;
2443: if (autoflush) {
2444: doflush();
2445: }
2446: if (autosynch) {
2447: dosynch();
2448: }
2449: }
2450:
2451: void
2452: sendbrk()
2453: {
2454: NET2ADD(IAC, BREAK);
2455: printoption("SENT", IAC, BREAK);
2456: flushline = 1;
2457: if (autoflush) {
2458: doflush();
2459: }
2460: if (autosynch) {
2461: dosynch();
2462: }
2463: }
2464:
2465: void
2466: sendabort()
2467: {
2468: NET2ADD(IAC, ABORT);
2469: printoption("SENT", IAC, ABORT);
2470: flushline = 1;
2471: if (autoflush) {
2472: doflush();
2473: }
2474: if (autosynch) {
2475: dosynch();
2476: }
2477: }
2478:
2479: void
2480: sendsusp()
2481: {
2482: NET2ADD(IAC, SUSP);
2483: printoption("SENT", IAC, SUSP);
2484: flushline = 1;
2485: if (autoflush) {
2486: doflush();
2487: }
2488: if (autosynch) {
2489: dosynch();
2490: }
2491: }
2492:
2493: void
2494: sendeof()
2495: {
2496: NET2ADD(IAC, xEOF);
2497: printoption("SENT", IAC, xEOF);
2498: }
2499:
2500: void
2501: sendayt()
2502: {
2503: NET2ADD(IAC, AYT);
2504: printoption("SENT", IAC, AYT);
2505: }
2506:
2507: /*
2508: * Send a window size update to the remote system.
2509: */
2510:
2511: void
2512: sendnaws()
2513: {
2514: long rows, cols;
2515: unsigned char tmp[16];
2516: register unsigned char *cp;
2517:
2518: if (my_state_is_wont(TELOPT_NAWS))
2519: return;
2520:
2521: #define PUTSHORT(cp, x) { if ((*cp++ = ((x)>>8)&0xff) == IAC) *cp++ = IAC; \
2522: if ((*cp++ = ((x))&0xff) == IAC) *cp++ = IAC; }
2523:
2524: if (TerminalWindowSize(&rows, &cols) == 0) { /* Failed */
2525: return;
2526: }
2527:
2528: cp = tmp;
2529:
2530: *cp++ = IAC;
2531: *cp++ = SB;
2532: *cp++ = TELOPT_NAWS;
2533: PUTSHORT(cp, cols);
2534: PUTSHORT(cp, rows);
2535: *cp++ = IAC;
2536: *cp++ = SE;
2537: if (NETROOM() >= cp - tmp) {
2538: ring_supply_data(&netoring, tmp, cp-tmp);
2539: printsub('>', tmp+2, cp - tmp - 2);
2540: }
2541: }
2542:
2543: void
2544: tel_enter_binary(rw)
2545: int rw;
2546: {
2547: if (rw&1)
2548: send_do(TELOPT_BINARY, 1);
2549: if (rw&2)
2550: send_will(TELOPT_BINARY, 1);
2551: }
2552:
2553: void
2554: tel_leave_binary(rw)
2555: int rw;
2556: {
2557: if (rw&1)
2558: send_dont(TELOPT_BINARY, 1);
2559: if (rw&2)
2560: send_wont(TELOPT_BINARY, 1);
2561: }