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3d8b96ab 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 sccsid[] = "@(#)outbound.c 3.1 10/29/86"; | |
24 | #endif /* lint */ | |
25 | ||
26 | ||
3d8b96ab GM |
27 | #include "hostctlr.h" |
28 | #include "screen.h" | |
29 | #include "ebc_disp.h" | |
30 | ||
31 | #include "../system/globals.h" | |
32 | #include "options.ext" | |
33 | #include "../telnet.ext" | |
34 | #include "inbound.ext" | |
35 | #include "outbound.ext" | |
564518ce | 36 | #include "../system/bsubs.ext" |
3d8b96ab GM |
37 | |
38 | #define SetHighestLowest(position) { \ | |
39 | if (position < Lowest) { \ | |
40 | Lowest = position; \ | |
41 | } \ | |
42 | if (position > Highest) { \ | |
43 | Highest = position; \ | |
44 | } \ | |
45 | } | |
46 | ||
3d8b96ab | 47 | |
25dbbecd GM |
48 | static int LastWasTerminated = 1; /* was "control" = 1 last time? */ |
49 | ||
3d8b96ab GM |
50 | /* some globals */ |
51 | ||
44d721ab | 52 | #if !defined(PURE3274) |
25dbbecd GM |
53 | int OutputClock; /* what time it is */ |
54 | int TransparentClock; /* time we were last in transparent */ | |
44d721ab | 55 | #endif /* !defined(PURE3274) */ |
3d8b96ab GM |
56 | \f |
57 | ||
58 | char CIABuffer[64] = { | |
59 | 0x40, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, | |
60 | 0xc8, 0xc9, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, | |
61 | 0x50, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, | |
62 | 0xd8, 0xd9, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, | |
63 | 0x60, 0x61, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, | |
64 | 0xe8, 0xe9, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, | |
65 | 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, | |
66 | 0xf8, 0xf9, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f | |
67 | }; | |
68 | \f | |
25dbbecd GM |
69 | /* |
70 | * ctlrinit() | |
71 | * | |
72 | * Initialize all data from the 'data' portion to their startup values. | |
73 | */ | |
74 | ||
75 | void | |
76 | ctlrinit() | |
77 | { | |
78 | LastWasTerminated = 1; | |
79 | } | |
80 | ||
3d8b96ab GM |
81 | /* What we know is that table is of size ScreenSize */ |
82 | ||
83 | FieldFind(table, position, failure) | |
84 | register char *table; /* which table of bytes to use */ | |
85 | register int position; /* what position to start from */ | |
86 | int failure; /* if unformatted, what value to return */ | |
87 | { | |
88 | register int ourp; | |
89 | ||
90 | ourp = position + 1 + bskip(table+position+1, ScreenSize-position-1, 0); | |
91 | if (ourp < ScreenSize) { | |
92 | return(ourp); | |
93 | } | |
94 | /* No fields in table after position. Look for fields from beginning | |
95 | * of table. | |
96 | */ | |
97 | ourp = bskip(table, position+1, 0); | |
98 | if (ourp <= position) { | |
99 | return(ourp); | |
100 | } | |
101 | return(failure); | |
102 | } | |
103 | ||
104 | /* Clear3270 - called to clear the screen */ | |
105 | ||
106 | void | |
107 | Clear3270() | |
108 | { | |
109 | bzero((char *)Host, sizeof(Host)); | |
110 | DeleteAllFields(); /* get rid of all fields */ | |
111 | BufferAddress = SetBufferAddress(0,0); | |
112 | CursorAddress = SetBufferAddress(0,0); | |
113 | Lowest = LowestScreen(); | |
114 | Highest = HighestScreen(); | |
115 | } | |
116 | \f | |
117 | /* AddHost - called to add a character to the buffer. | |
118 | * We use a macro in this module, since we call it so | |
119 | * often from loops. | |
120 | * | |
121 | * NOTE: It is a macro, so don't go around using AddHost(p, *c++), or | |
122 | * anything similar. (I don't define any temporary variables, again | |
123 | * just for the speed.) | |
124 | */ | |
125 | void | |
126 | AddHost(position, character) | |
127 | int position; | |
128 | char character; | |
129 | { | |
130 | #if defined(SLOWSCREEN) | |
131 | # define AddHostA(p,c) \ | |
132 | { \ | |
133 | if (IsStartField(p)) { \ | |
134 | DeleteField(p); \ | |
135 | Highest = HighestScreen(); \ | |
136 | Lowest = LowestScreen(); \ | |
137 | SetHighestLowest(p); \ | |
138 | } \ | |
139 | SetHost(p, c); \ | |
140 | } | |
141 | # define AddHost(p,c) \ | |
142 | { \ | |
143 | if (c != GetHost(p)) { \ | |
144 | SetHighestLowest(p); \ | |
145 | } \ | |
146 | AddHostA(p,c); \ | |
147 | } /* end of macro of AddHost */ | |
148 | #else /* defined(SLOWSCREEN) */ | |
149 | # define AddHost(p,c) \ | |
150 | { \ | |
151 | if (IsStartField(p)) { \ | |
152 | DeleteField(p); \ | |
153 | Highest = HighestScreen(); \ | |
154 | Lowest = LowestScreen(); \ | |
155 | SetHost(p, c); \ | |
156 | } else { \ | |
157 | SetHost(p, c); \ | |
158 | SetHighestLowest(p); \ | |
159 | } \ | |
160 | } /* end of macro of AddHost */ | |
161 | #endif /* defined(SLOWSCREEN) */ | |
162 | ||
163 | AddHost(position, character); | |
164 | } | |
165 | \f | |
166 | /* returns the number of characters consumed */ | |
167 | int | |
168 | DataFromNetwork(buffer, count, control) | |
169 | register unsigned char *buffer; /* what the data is */ | |
170 | register int count; /* and how much there is */ | |
171 | int control; /* this buffer ended block? */ | |
172 | { | |
173 | int origCount; | |
174 | register int c; | |
175 | register int i; | |
176 | static int Command; | |
177 | static int Wcc; | |
3d8b96ab GM |
178 | |
179 | origCount = count; | |
180 | ||
181 | if (LastWasTerminated) { | |
182 | ||
183 | if (count < 2) { | |
184 | if (count == 0) { | |
15fd51e0 | 185 | ExitString("Short count received from host!\n", 1); |
3d8b96ab GM |
186 | return(count); |
187 | } | |
188 | Command = buffer[0]; | |
189 | switch (Command) { /* This had better be a read command */ | |
190 | case CMD_READ_MODIFIED: | |
191 | case CMD_SNA_READ_MODIFIED: | |
192 | case CMD_SNA_READ_MODIFIED_ALL: | |
193 | DoReadModified(Command); | |
194 | break; | |
195 | case CMD_READ_BUFFER: | |
196 | case CMD_SNA_READ_BUFFER: | |
197 | DoReadBuffer(); | |
198 | break; | |
199 | default: | |
200 | break; | |
201 | } | |
202 | return(1); /* We consumed everything */ | |
203 | } | |
204 | Command = buffer[0]; | |
205 | Wcc = buffer[1]; | |
206 | if (Wcc & WCC_RESET_MDT) { | |
207 | i = c = WhereAttrByte(LowestScreen()); | |
208 | do { | |
209 | if (HasMdt(i)) { | |
210 | TurnOffMdt(i); | |
211 | } | |
212 | i = FieldInc(i); | |
213 | } while (i != c); | |
214 | } | |
215 | ||
216 | switch (Command) { | |
217 | case CMD_ERASE_WRITE: | |
218 | case CMD_ERASE_WRITE_ALTERNATE: | |
219 | case CMD_SNA_ERASE_WRITE: | |
220 | case CMD_SNA_ERASE_WRITE_ALTERNATE: | |
221 | { | |
222 | int newlines, newcolumns; | |
223 | ||
3d8b96ab GM |
224 | if ((Command == CMD_ERASE_WRITE) |
225 | || (Command == CMD_SNA_ERASE_WRITE)) { | |
226 | newlines = 24; | |
227 | newcolumns = 80; | |
228 | } else { | |
229 | newlines = MaxNumberLines; | |
230 | newcolumns = MaxNumberColumns; | |
231 | } | |
232 | if ((newlines != NumberLines) | |
233 | || (newcolumns != NumberColumns)) { | |
234 | /* | |
235 | * The LocalClearScreen() is really for when we | |
236 | * are going from a larger screen to a smaller | |
237 | * screen, and we need to clear off the stuff | |
238 | * at the end of the lines, or the lines at | |
239 | * the end of the screen. | |
240 | */ | |
241 | LocalClearScreen(); | |
242 | NumberLines = newlines; | |
243 | NumberColumns = newcolumns; | |
244 | ScreenSize = NumberLines * NumberColumns; | |
245 | } | |
246 | Clear3270(); | |
44d721ab | 247 | #if !defined(PURE3274) |
3d8b96ab | 248 | if (TransparentClock == OutputClock) { |
15fd51e0 | 249 | TransStop(); |
3d8b96ab | 250 | } |
44d721ab | 251 | #endif /* !defined(PURE3274) */ |
3d8b96ab GM |
252 | break; |
253 | } | |
254 | ||
255 | case CMD_ERASE_ALL_UNPROTECTED: | |
256 | case CMD_SNA_ERASE_ALL_UNPROTECTED: | |
257 | CursorAddress = HighestScreen()+1; | |
258 | for (i = LowestScreen(); i <= HighestScreen(); i = ScreenInc(i)) { | |
259 | if (IsUnProtected(i)) { | |
260 | if (CursorAddress > i) { | |
261 | CursorAddress = i; | |
262 | } | |
263 | AddHost(i, '\0'); | |
264 | } | |
265 | if (HasMdt(i)) { | |
266 | TurnOffMdt(i); | |
267 | } | |
268 | } | |
269 | if (CursorAddress == HighestScreen()+1) { | |
270 | CursorAddress = SetBufferAddress(0,0); | |
271 | } | |
272 | UnLocked = 1; | |
273 | AidByte = 0; | |
274 | break; | |
275 | case CMD_WRITE: | |
276 | case CMD_SNA_WRITE: | |
277 | break; | |
278 | default: | |
279 | { | |
280 | char buffer[100]; | |
281 | ||
282 | sprintf(buffer, "Unexpected command code 0x%x received.\n", | |
283 | Command); | |
15fd51e0 | 284 | ExitString(buffer, 1); |
3d8b96ab GM |
285 | break; |
286 | } | |
287 | } | |
288 | ||
289 | count -= 2; /* strip off command and wcc */ | |
290 | buffer += 2; | |
291 | ||
292 | } | |
293 | LastWasTerminated = 0; /* then, reset at end... */ | |
294 | ||
295 | while (count) { | |
296 | count--; | |
297 | c = *buffer++; | |
298 | if (IsOrder(c)) { | |
299 | /* handle an order */ | |
300 | switch (c) { | |
301 | # define Ensure(x) if (count < x) { \ | |
302 | if (!control) { \ | |
303 | return(origCount-(count+1)); \ | |
304 | } else { \ | |
305 | /* XXX - should not occur */ \ | |
306 | count = 0; \ | |
307 | break; \ | |
308 | } \ | |
309 | } | |
310 | case ORDER_SF: | |
311 | Ensure(1); | |
312 | c = *buffer++; | |
313 | count--; | |
314 | if ( ! (IsStartField(BufferAddress) && | |
315 | FieldAttributes(BufferAddress) == c)) { | |
316 | SetHighestLowest(BufferAddress); | |
317 | NewField(BufferAddress,c); | |
318 | } | |
3d8b96ab GM |
319 | BufferAddress = ScreenInc(BufferAddress); |
320 | break; | |
321 | case ORDER_SBA: | |
322 | Ensure(2); | |
323 | i = buffer[0]; | |
324 | c = buffer[1]; | |
44d721ab | 325 | #if !defined(PURE3274) |
3d8b96ab GM |
326 | if (!i && !c) { /* transparent write */ |
327 | if (!control) { | |
328 | return(origCount-(count+1)); | |
329 | } else { | |
15fd51e0 GM |
330 | TransparentClock = OutputClock; /* clock next */ |
331 | TransOut(buffer+2, count-2); /* output */ | |
332 | SendToIBM(); /* ack block */ | |
3d8b96ab GM |
333 | TransparentClock = OutputClock+1; /* clock next */ |
334 | buffer += count; | |
335 | count -= count; | |
336 | } | |
44d721ab | 337 | break; |
3d8b96ab | 338 | } |
44d721ab GM |
339 | #endif /* !defined(PURE3274) */ |
340 | BufferAddress = Addr3270(i, c); | |
341 | buffer += 2; | |
342 | count -= 2; | |
3d8b96ab GM |
343 | break; |
344 | case ORDER_IC: | |
345 | CursorAddress = BufferAddress; | |
346 | break; | |
347 | case ORDER_PT: | |
348 | for (i = ScreenInc(BufferAddress); (i != HighestScreen()); | |
349 | i = ScreenInc(i)) { | |
350 | if (IsStartField(i)) { | |
351 | i = ScreenInc(i); | |
352 | if (!IsProtected(ScreenInc(i))) { | |
353 | break; | |
354 | } | |
355 | if (i == HighestScreen()) { | |
356 | break; | |
357 | } | |
358 | } | |
359 | } | |
360 | CursorAddress = i; | |
361 | break; | |
362 | case ORDER_RA: | |
363 | Ensure(3); | |
364 | i = Addr3270(buffer[0], buffer[1]); | |
365 | c = buffer[2]; | |
366 | do { | |
367 | AddHost(BufferAddress, ebc_disp[c]); | |
368 | BufferAddress = ScreenInc(BufferAddress); | |
369 | } while (BufferAddress != i); | |
370 | buffer += 3; | |
371 | count -= 3; | |
372 | break; | |
373 | case ORDER_EUA: /* (from [here,there), ie: half open interval] */ | |
374 | Ensure(2); | |
564518ce GM |
375 | /* |
376 | * Compiler error - msc version 4.0: | |
377 | * "expression too complicated". | |
378 | */ | |
379 | i = WhereAttrByte(BufferAddress); | |
380 | c = FieldAttributes(i); | |
3d8b96ab GM |
381 | for (i = Addr3270(buffer[0], buffer[1]); i != BufferAddress; |
382 | BufferAddress = ScreenInc(BufferAddress)) { | |
383 | if (!IsProtectedAttr(BufferAddress, c)) { | |
384 | AddHost(BufferAddress, 0); | |
385 | } | |
386 | } | |
387 | buffer += 2; | |
388 | count -= 2; | |
389 | break; | |
390 | case ORDER_YALE: /* special YALE defined order */ | |
391 | Ensure(2); /* need at least two characters */ | |
392 | if (*buffer == 0x5b) { | |
393 | i = OptOrder(buffer+1, count-1, control); | |
394 | if (i == 0) { | |
395 | return(origCount-(count+1)); /* come here again */ | |
396 | } else { | |
397 | buffer += 1 + i; | |
398 | count -= (1 + i); | |
399 | } | |
400 | } | |
401 | break; | |
402 | default: | |
403 | break; /* XXX ? */ | |
404 | } | |
405 | if (count < 0) { | |
406 | count = 0; | |
407 | } | |
408 | } else { | |
409 | /* Data comes in large clumps - take it all */ | |
410 | i = BufferAddress; | |
411 | #if !defined(SLOWSCREEN) | |
412 | AddHost(i, ebc_disp[c]); | |
413 | #else /* !defined(SLOWSCREEN) */ | |
414 | AddHostA(i, ebc_disp[c]); | |
415 | SetHighestLowest(i); | |
416 | #endif /* !defined(SLOWSCREEN) */ | |
417 | i = ScreenInc(i); | |
418 | c = *buffer; | |
419 | while (count && !IsOrder(c)) { | |
420 | #if !defined(SLOWSCREEN) | |
421 | AddHost(i, ebc_disp[c]); | |
422 | #else /* !defined(SLOWSCREEN) */ | |
423 | AddHostA(i, ebc_disp[c]); | |
424 | #endif /* !defined(SLOWSCREEN) */ | |
425 | i = ScreenInc(i); | |
426 | #if defined(SLOWSCREEN) | |
427 | if (i == LowestScreen()) { | |
428 | SetHighestLowest(HighestScreen()); | |
429 | } | |
430 | #endif /* defined(SLOWSCREEN) */ | |
431 | count--; | |
432 | buffer++; | |
433 | c = *buffer; | |
434 | } | |
435 | #if defined(SLOWSCREEN) | |
436 | SetHighestLowest(i); | |
437 | #endif /* defined(SLOWSCREEN) */ | |
438 | BufferAddress = i; | |
439 | } | |
440 | } | |
441 | if (count == 0) { | |
44d721ab | 442 | #if !defined(PURE3274) |
3d8b96ab | 443 | OutputClock++; /* time rolls on */ |
44d721ab | 444 | #endif /* !defined(PURE3274) */ |
3d8b96ab GM |
445 | if (control) { |
446 | if (Wcc & WCC_RESTORE) { | |
44d721ab | 447 | #if !defined(PURE3274) |
3d8b96ab GM |
448 | if (TransparentClock != OutputClock) { |
449 | AidByte = 0; | |
450 | } | |
44d721ab GM |
451 | #else /* !defined(PURE3274) */ |
452 | AidByte = 0; | |
453 | #endif /* !defined(PURE3274) */ | |
3d8b96ab GM |
454 | UnLocked = 1; |
455 | } | |
456 | if (Wcc & WCC_ALARM) { | |
457 | RingBell(0); | |
458 | } | |
459 | } | |
460 | LastWasTerminated = control; /* state for next time */ | |
461 | return(origCount); | |
462 | } else { | |
463 | return(origCount-count); | |
464 | } | |
465 | } | |
25dbbecd GM |
466 | |
467 | /* | |
468 | * Init3270() | |
469 | * | |
470 | * Initialize any 3270 (controller) variables to an initial state | |
471 | * in preparation for accepting a connection. | |
472 | */ | |
473 | ||
474 | void | |
475 | Init3270() | |
476 | { | |
477 | OptInit(); /* initialize mappings */ | |
478 | ||
479 | bzero((char *)Host, sizeof Host); /* Clear host */ | |
480 | ||
481 | bzero(Orders, sizeof Orders); | |
482 | Orders[ORDER_SF] = Orders[ORDER_SBA] = Orders[ORDER_IC] | |
483 | = Orders[ORDER_PT] = Orders[ORDER_RA] = Orders[ORDER_EUA] | |
484 | = Orders[ORDER_YALE] = 1; /* What is an order */ | |
485 | ||
486 | DeleteAllFields(); /* Clear screen */ | |
487 | Lowest = HighestScreen()+1; | |
488 | Highest = LowestScreen()-1; | |
489 | CursorAddress = BufferAddress = SetBufferAddress(0,0); | |
490 | UnLocked = 1; | |
491 | OutputClock = 1; | |
492 | TransparentClock = -1; | |
493 | } |