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jcs zmodem: Set ZP0 to something in ZRINIT | Latest amendment: 502 on 2023-05-01 |
1 | /* |
2 | * Copyright (c) 2022 joshua stein <jcs@jcs.org> |
3 | * |
4 | * Copyright (C) 1994-1998 T. Teranishi |
5 | * (C) 2007- TeraTerm Project |
6 | * All rights reserved. |
7 | * |
8 | * Redistribution and use in source and binary forms, with or without |
9 | * modification, are permitted provided that the following conditions |
10 | * are met: |
11 | * |
12 | * 1. Redistributions of source code must retain the above copyright |
13 | * notice, this list of conditions and the following disclaimer. |
14 | * 2. Redistributions in binary form must reproduce the above copyright |
15 | * notice, this list of conditions and the following disclaimer in the |
16 | * documentation and/or other materials provided with the distribution. |
17 | * 3. The name of the author may not be used to endorse or promote products |
18 | * derived from this software without specific prior written permission. |
19 | * |
20 | * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR |
21 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
22 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
23 | * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
24 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
25 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
26 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
27 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
28 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
29 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
30 | */ |
31 | |
32 | #include <stdarg.h> |
33 | #include <stdio.h> |
34 | #include <stdlib.h> |
35 | #include <string.h> |
36 | #include <time.h> |
37 | |
38 | #include "crc.h" |
39 | #include "util.h" |
40 | #include "zmodem.h" |
41 | |
42 | /* #define ZMODEM_DEBUG */ |
43 | |
44 | #define ZMODEM_TIMEOUT 20 |
45 | |
46 | #ifdef ZMODEM_DEBUG |
47 | #include "logger.h" |
48 | extern struct logger *logger; |
49 | #endif |
50 | |
51 | #define LOBYTE(w) ((unsigned char)(((unsigned short)(w)) & 0xff)) |
52 | #define HIBYTE(w) ((unsigned char)((((unsigned short)(w)) >> 8) & 0xff)) |
53 | #define LOWORD(l) ((unsigned short)(l)) |
54 | #define HIWORD(l) ((unsigned short)(((unsigned long)(l) >> 16) & 0xFFFF)) |
55 | |
56 | #define Z_RecvInit 1 |
57 | #define Z_RecvInit2 2 |
58 | #define Z_RecvData 3 |
59 | #define Z_RecvFIN 4 |
60 | #define Z_SendInit 5 |
61 | #define Z_SendInitHdr 6 |
62 | #define Z_SendInitDat 7 |
63 | #define Z_SendFileHdr 8 |
64 | #define Z_SendFileDat 9 |
65 | #define Z_SendDataHdr 10 |
66 | #define Z_SendDataDat 11 |
67 | #define Z_SendDataDat2 12 |
68 | #define Z_SendEOF 13 |
69 | #define Z_SendFIN 14 |
70 | #define Z_SendSkip 15 |
71 | #define Z_Cancel 16 |
72 | #define Z_End 17 |
73 | |
74 | #define Z_PktGetPAD 1 |
75 | #define Z_PktGetDLE 2 |
76 | #define Z_PktHdrFrm 3 |
77 | #define Z_PktGetBin 4 |
78 | #define Z_PktGetHex 5 |
79 | #define Z_PktGetHexEOL 6 |
80 | #define Z_PktGetData 7 |
81 | #define Z_PktGetCRC 8 |
82 | |
83 | #define ZPAD '*' |
84 | #define ZDLE 0x18 |
85 | #define ZDLEE 0x58 |
86 | #define ZBIN 'A' |
87 | #define ZHEX 'B' |
88 | #define ZBIN32 'C' |
89 | |
90 | #define ZRQINIT 0 |
91 | #define ZRINIT 1 |
92 | #define ZSINIT 2 |
93 | #define ZACK 3 |
94 | #define ZFILE 4 |
95 | #define ZSKIP 5 |
96 | #define ZNAK 6 |
97 | #define ZABORT 7 |
98 | #define ZFIN 8 |
99 | #define ZRPOS 9 |
100 | #define ZDATA 10 |
101 | #define ZEOF 11 |
102 | #define ZFERR 12 |
103 | #define ZCRC 13 |
104 | #define ZCHALLENGE 14 |
105 | #define ZCOMPL 15 |
106 | #define ZCAN 16 |
107 | #define ZFREECNT 17 |
108 | #define ZCOMMAND 18 |
109 | #define ZSTDERR 19 |
110 | |
111 | #define ZCRCE 'h' |
112 | #define ZCRCG 'i' |
113 | #define ZCRCQ 'j' |
114 | #define ZCRCW 'k' |
115 | #define ZRUB0 'l' |
116 | #define ZRUB1 'm' |
117 | |
118 | #define ZF0 3 |
119 | #define ZF1 2 |
120 | #define ZF2 1 |
121 | #define ZF3 0 |
122 | #define ZP0 0 |
123 | #define ZP1 1 |
124 | #define ZP2 2 |
125 | #define ZP3 3 |
126 | |
127 | #define CANFDX 0x01 |
128 | #define CANOVIO 0x02 |
129 | #define CANBRK 0x04 |
130 | #define CANCRY 0x08 |
131 | #define CANLZW 0x10 |
132 | #define CANFC32 0x20 |
133 | #define ESCCTL 0x40 |
134 | #define ESC8 0x80 |
135 | |
136 | #define ZCBIN 1 |
137 | #define ZCNL 2 |
138 | |
139 | #define XON 0x11 |
140 | #define IAC 0xff |
141 | |
142 | short ZRead1Byte(struct zmodem_session *, unsigned char *); |
143 | void ZPutHex(struct zmodem_session *, short *, unsigned char); |
144 | void ZResetTimeout(struct zmodem_session *, short); |
145 | void ZShHdr(struct zmodem_session *, unsigned char); |
146 | void ZPutBin(struct zmodem_session *, short *, unsigned char); |
147 | void ZSbHdr(struct zmodem_session *, unsigned char); |
148 | void ZStoHdr(struct zmodem_session *, unsigned long); |
149 | long ZRclHdr(struct zmodem_session *); |
150 | void ZSendRInit(struct zmodem_session *); |
151 | void ZSendRQInit(struct zmodem_session *); |
152 | void ZSendRPOS(struct zmodem_session *); |
153 | void ZSendACK(struct zmodem_session *); |
154 | void ZSendNAK(struct zmodem_session *); |
155 | void ZSendEOF(struct zmodem_session *); |
156 | void ZSendFIN(struct zmodem_session *); |
157 | void ZSendSkip(struct zmodem_session *); |
158 | void ZSendCancel(struct zmodem_session *); |
159 | void ZSendInitHdr(struct zmodem_session *); |
160 | void ZSendInitDat(struct zmodem_session *); |
161 | void ZSendFileHdr(struct zmodem_session *); |
162 | void ZSendFileDat(struct zmodem_session *); |
163 | void ZSendDataHdr(struct zmodem_session *); |
164 | void ZSendDataDat(struct zmodem_session *); |
165 | bool ZCheckHdr(struct zmodem_session *); |
166 | void ZParseRInit(struct zmodem_session *); |
167 | bool ZParseSInit(struct zmodem_session *); |
168 | void ZParseHdr(struct zmodem_session *); |
169 | bool ZCreateTemporaryFile(struct zmodem_session *); |
170 | bool ZParseFile(struct zmodem_session *); |
171 | bool ZWriteData(struct zmodem_session *); |
172 | void ZCheckData(struct zmodem_session *); |
173 | |
174 | #ifdef ZMODEM_DEBUG |
175 | |
176 | static const char * |
177 | hdrtype_name(short type) |
178 | { |
179 | static const char *s[] = { |
180 | "ZRQINIT", |
181 | "ZRINIT", |
182 | "ZSINIT", |
183 | "ZACK", |
184 | "ZFILE", |
185 | "ZSKIP", |
186 | "ZNAK", |
187 | "ZABORT", |
188 | "ZFIN", |
189 | "ZRPOS", |
190 | "ZDATA", |
191 | "ZEOF", |
192 | "ZFERR", |
193 | "ZCRC", |
194 | "ZCHALLENGE", |
195 | "ZCOMPL", |
196 | "ZCAN", |
197 | "ZFREECNT", |
198 | "ZCOMMAND", |
199 | "ZSTDERR", |
200 | }; |
201 | |
202 | if (type >= ZRQINIT && type <= ZSTDERR) |
203 | return (s[type]); |
204 | |
205 | return ""; |
206 | } |
207 | |
208 | static const char * |
209 | state_name(struct zmodem_session *zs) |
210 | { |
211 | static const char *s[] = { |
212 | "", |
213 | "Z_RecvInit", |
214 | "Z_RecvInit2", |
215 | "Z_RecvData", |
216 | "Z_RecvFIN", |
217 | "Z_SendInit", |
218 | "Z_SendInitHdr", |
219 | "Z_SendInitDat", |
220 | "Z_SendFileHdr", |
221 | "Z_SendFileDat", |
222 | "Z_SendDataHdr", |
223 | "Z_SendDataDat", |
224 | "Z_SendDataDat2", |
225 | "Z_SendEOF", |
226 | "Z_SendFIN", |
227 | "Z_SendSkip", |
228 | "Z_Cancel", |
229 | "Z_End", |
230 | }; |
231 | |
232 | if (zs->ZState >= Z_RecvInit && zs->ZState <= Z_End) |
233 | return (s[zs->ZState]); |
234 | |
235 | return ""; |
236 | } |
237 | |
238 | #endif /* ZMODEM_DEBUG */ |
239 | |
240 | struct zmodem_session * |
241 | ZCreateSender(struct session *session, FILE *fp, char *file_name) |
242 | { |
243 | struct zmodem_session *zs; |
244 | |
245 | if (!fp) |
246 | return NULL; |
247 | |
248 | zs = xmalloczero(sizeof(struct zmodem_session)); |
249 | if (zs == NULL) |
250 | return NULL; |
251 | zs->session = session; |
252 | zs->file = fp; |
253 | strlcpy(zs->file_name, file_name, sizeof(zs->file_name)); |
254 | |
255 | fseek(zs->file, 0, SEEK_END); |
256 | zs->file_size = ftell(zs->file); |
257 | fseek(zs->file, 0, SEEK_SET); |
258 | |
259 | zs->BinFlag = true; |
260 | zs->ZMode = IdZAutoS; |
261 | |
262 | return zs; |
263 | } |
264 | |
265 | struct zmodem_session * |
266 | ZCreateReceiver(struct session *session, char *path) |
267 | { |
268 | struct zmodem_session *zs; |
269 | |
270 | zs = xmalloczero(sizeof(struct zmodem_session)); |
271 | if (zs == NULL) |
272 | return NULL; |
273 | zs->session = session; |
274 | zs->ZMode = IdZAutoR; |
275 | zs->upload_file_path = xstrdup(path); |
276 | if (zs->upload_file_path == NULL) { |
277 | xfree(&zs); |
278 | return NULL; |
279 | } |
280 | |
281 | return zs; |
282 | } |
283 | |
284 | short |
285 | ZRead1Byte(struct zmodem_session *zs, unsigned char *b) |
286 | { |
287 | if (zs->DoIACEscape && zs->LastIAC != 0 && zs->LastIAC != IAC) { |
288 | *b = zs->LastIAC; |
289 | zs->LastIAC = 0; |
290 | return 1; |
291 | } |
292 | |
293 | if (session_get_char(zs->session, b) == 0) |
294 | return 0; |
295 | |
296 | if (zs->DoIACEscape && zs->LastIAC) { |
297 | if (*b == IAC) { |
298 | zs->LastIAC = 0; |
299 | return 1; |
300 | } |
301 | |
302 | /* |
303 | * The IAC was not escaping an IAC, so return IAC this time and |
304 | * save the byte we just read for the next iteration. |
305 | */ |
306 | zs->LastIAC = *b; |
307 | *b = IAC; |
308 | return 1; |
309 | } |
310 | |
311 | if (zs->DoIACEscape && *b == IAC) { |
312 | zs->LastIAC = IAC; |
313 | return 0; |
314 | } |
315 | |
316 | /* ignore 0x11, 0x13, 0x81 and 0x83 */ |
317 | if (((*b & 0x7F) == 0x11) || ((*b & 0x7F) == 0x13)) |
318 | return 0; |
319 | |
320 | return 1; |
321 | } |
322 | |
323 | void |
324 | ZPutHex(struct zmodem_session *zs, short *i, unsigned char b) |
325 | { |
326 | if (b <= 0x9f) |
327 | zs->PktOut[*i] = (b >> 4) + 0x30; |
328 | else |
329 | zs->PktOut[*i] = (b >> 4) + 0x57; |
330 | |
331 | (*i)++; |
332 | |
333 | if ((b & 0x0F) <= 0x09) |
334 | zs->PktOut[*i] = (b & 0x0F) + 0x30; |
335 | else |
336 | zs->PktOut[*i] = (b & 0x0F) + 0x57; |
337 | |
338 | (*i)++; |
339 | } |
340 | |
341 | void |
342 | ZResetTimeout(struct zmodem_session *zs, short seconds) |
343 | { |
344 | zs->TimeOutAt = Time + seconds; |
345 | } |
346 | |
347 | bool |
348 | ZHaveTimedOut(struct zmodem_session *zs) |
349 | { |
350 | if (zs->TimeOutAt && Time >= zs->TimeOutAt) |
351 | return true; |
352 | |
353 | return false; |
354 | } |
355 | |
356 | void |
357 | ZShHdr(struct zmodem_session *zs, unsigned char HdrType) |
358 | { |
359 | short i; |
360 | |
361 | zs->PktOut[0] = ZPAD; |
362 | zs->PktOut[1] = ZPAD; |
363 | zs->PktOut[2] = ZDLE; |
364 | zs->PktOut[3] = ZHEX; |
365 | zs->PktOutCount = 4; |
366 | ZPutHex(zs, &(zs->PktOutCount), HdrType); |
367 | zs->CRC = UpdateCRC(HdrType, 0); |
368 | for (i = 0; i <= 3; i++) { |
369 | ZPutHex(zs, &(zs->PktOutCount), zs->TxHdr[i]); |
370 | zs->CRC = UpdateCRC(zs->TxHdr[i], zs->CRC); |
371 | } |
372 | ZPutHex(zs, &(zs->PktOutCount), HIBYTE(zs->CRC)); |
373 | ZPutHex(zs, &(zs->PktOutCount), LOBYTE(zs->CRC)); |
374 | zs->PktOut[zs->PktOutCount] = 0x8D; |
375 | zs->PktOutCount++; |
376 | zs->PktOut[zs->PktOutCount] = 0x8A; |
377 | zs->PktOutCount++; |
378 | |
379 | if ((HdrType != ZFIN) && (HdrType != ZACK)) { |
380 | zs->PktOut[zs->PktOutCount] = XON; |
381 | zs->PktOutCount++; |
382 | } |
383 | |
384 | zs->PktOutPtr = 0; |
385 | zs->Sending = true; |
386 | |
387 | #ifdef ZMODEM_DEBUG |
388 | logger_printf("[%s] ZShHdr: %s", state_name(zs), |
389 | hdrtype_name(HdrType)); |
390 | #endif |
391 | } |
392 | |
393 | /* |
394 | * In lrzsz, ZDLE (CAN), DLE, XON, XOFF, CR immediately after @, and these |
395 | * Characters with MSB are escaped. |
396 | * It seems that it was the same as lrzsz in Tera Term before, but for some |
397 | * reason CR is always changed to escape target. |
398 | * |
399 | * To avoid problems if you connect to ssh / telnet from the destination |
400 | * LF and GS are also added to the default escape target. |
401 | * ssh: ~ immediately after LF or CR is treated as an escape character |
402 | * telnet: GS is the escape character |
403 | */ |
404 | void |
405 | ZPutBin(struct zmodem_session *zs, short *i, unsigned char b) |
406 | { |
407 | switch (b) { |
408 | case 0x0D: // CR |
409 | case 0x8D: // CR | 0x80 |
410 | if (zs->CtlEsc || ((zs->LastSent & 0x7f) == '@')) { |
411 | zs->PktOut[*i] = ZDLE; |
412 | (*i)++; |
413 | b = b ^ 0x40; |
414 | } |
415 | break; |
416 | case 0x0A: // LF |
417 | case 0x10: // DLE |
418 | case 0x11: // XON |
419 | case 0x13: // XOFF |
420 | case 0x1d: // GS |
421 | case ZDLE: // CAN(0x18) |
422 | case 0x8A: // LF | 0x80 |
423 | case 0x90: // DLE | 0x80 |
424 | case 0x91: // XON | 0x80 |
425 | case 0x93: // XOFF | 0x80 |
426 | case 0x9d: // GS | 0x80 |
427 | zs->PktOut[*i] = ZDLE; |
428 | (*i)++; |
429 | b = b ^ 0x40; |
430 | break; |
431 | case 0xff: |
432 | if (zs->DoIACEscape) { |
433 | zs->PktOut[*i] = 0xff; |
434 | (*i)++; |
435 | } |
436 | /* FALLTHROUGH */ |
437 | default: |
438 | if (zs->CtlEsc && ((b & 0x60) == 0)) { |
439 | zs->PktOut[*i] = ZDLE; |
440 | (*i)++; |
441 | b = b ^ 0x40; |
442 | } |
443 | } |
444 | zs->LastSent = b; |
445 | zs->PktOut[*i] = b; |
446 | (*i)++; |
447 | } |
448 | |
449 | void |
450 | ZSbHdr(struct zmodem_session *zs, unsigned char HdrType) |
451 | { |
452 | short i; |
453 | |
454 | zs->PktOut[0] = ZPAD; |
455 | zs->PktOut[1] = ZDLE; |
456 | zs->PktOut[2] = ZBIN; |
457 | zs->PktOutCount = 3; |
458 | ZPutBin(zs, &(zs->PktOutCount), HdrType); |
459 | zs->CRC = UpdateCRC(HdrType, 0); |
460 | for (i = 0; i <= 3; i++) { |
461 | ZPutBin(zs, &(zs->PktOutCount), zs->TxHdr[i]); |
462 | zs->CRC = UpdateCRC(zs->TxHdr[i], zs->CRC); |
463 | } |
464 | ZPutBin(zs, &(zs->PktOutCount), HIBYTE(zs->CRC)); |
465 | ZPutBin(zs, &(zs->PktOutCount), LOBYTE(zs->CRC)); |
466 | |
467 | zs->PktOutPtr = 0; |
468 | zs->Sending = true; |
469 | |
470 | #ifdef ZMODEM_DEBUG |
471 | logger_printf("[%s] ZSbHdr: %s", state_name(zs), |
472 | hdrtype_name(HdrType)); |
473 | #endif |
474 | } |
475 | |
476 | void |
477 | ZStoHdr(struct zmodem_session *zs, unsigned long Pos) |
478 | { |
479 | zs->TxHdr[ZP0] = LOBYTE(LOWORD(Pos)); |
480 | zs->TxHdr[ZP1] = HIBYTE(LOWORD(Pos)); |
481 | zs->TxHdr[ZP2] = LOBYTE(HIWORD(Pos)); |
482 | zs->TxHdr[ZP3] = HIBYTE(HIWORD(Pos)); |
483 | } |
484 | |
485 | long |
486 | ZRclHdr(struct zmodem_session *zs) |
487 | { |
488 | unsigned long l; |
489 | |
490 | l = (unsigned char)(zs->RxHdr[ZP3]); |
491 | l = (l << 8) + (unsigned char)(zs->RxHdr[ZP2]); |
492 | l = (l << 8) + (unsigned char)(zs->RxHdr[ZP1]); |
493 | return ((l << 8) + (unsigned char)(zs->RxHdr[ZP0])); |
494 | } |
495 | |
496 | void |
497 | ZSendRInit(struct zmodem_session *zs) |
498 | { |
499 | zs->Pos = 0; |
500 | /* we only want this much data thrown at us before we ack it */ |
501 | ZStoHdr(zs, ZMODEM_BLOCK_SIZE * 2); |
502 | zs->TxHdr[ZF0] = CANFC32 | CANFDX; |
503 | if (zs->CtlEsc) |
504 | zs->TxHdr[ZF0] = zs->TxHdr[ZF0] | ESCCTL; |
505 | ZShHdr(zs, ZRINIT); |
506 | } |
507 | |
508 | void |
509 | ZSendRQInit(struct zmodem_session *zs) |
510 | { |
511 | ZStoHdr(zs, 0); |
512 | ZShHdr(zs, ZRQINIT); |
513 | } |
514 | |
515 | void |
516 | ZSendRPOS(struct zmodem_session *zs) |
517 | { |
518 | ZStoHdr(zs, zs->Pos); |
519 | ZShHdr(zs, ZRPOS); |
520 | ZResetTimeout(zs, zs->TimeOut); |
521 | } |
522 | |
523 | void |
524 | ZSendACK(struct zmodem_session *zs) |
525 | { |
526 | ZStoHdr(zs, 0); |
527 | ZShHdr(zs, ZACK); |
528 | ZResetTimeout(zs, zs->TimeOut); |
529 | } |
530 | |
531 | void |
532 | ZSendNAK(struct zmodem_session *zs) |
533 | { |
534 | ZStoHdr(zs, 0); |
535 | ZShHdr(zs, ZNAK); |
536 | } |
537 | |
538 | void |
539 | ZSendEOF(struct zmodem_session *zs) |
540 | { |
541 | ZStoHdr(zs, zs->Pos); |
542 | ZShHdr(zs, ZEOF); |
543 | zs->ZState = Z_SendEOF; |
544 | } |
545 | |
546 | void |
547 | ZSendFIN(struct zmodem_session *zs) |
548 | { |
549 | ZStoHdr(zs, 0); |
550 | ZShHdr(zs, ZFIN); |
551 | } |
552 | |
553 | void |
554 | ZSendSkip(struct zmodem_session *zs) |
555 | { |
556 | ZStoHdr(zs, 0); |
557 | ZShHdr(zs, ZSKIP); |
558 | } |
559 | |
560 | void |
561 | ZSendCancel(struct zmodem_session *zs) |
562 | { |
563 | short i; |
564 | |
565 | for (i = 0; i <= 7; i++) |
566 | zs->PktOut[i] = ZDLE; |
567 | for (i = 8; i <= 17; i++) |
568 | zs->PktOut[i] = 0x08; |
569 | zs->PktOutCount = 18; |
570 | zs->PktOutPtr = 0; |
571 | zs->Sending = true; |
572 | zs->ZState = Z_Cancel; |
573 | |
574 | #ifdef ZMODEM_DEBUG |
575 | logger_printf("[%s] ZSendCancel", state_name(zs)); |
576 | #endif |
577 | } |
578 | |
579 | void |
580 | ZSendInitHdr(struct zmodem_session *zs) |
581 | { |
582 | zs->ZState = Z_SendInitHdr; |
583 | ZStoHdr(zs, 0); |
584 | if (zs->CtlEsc) |
585 | zs->TxHdr[ZF0] = ESCCTL; |
586 | ZShHdr(zs, ZSINIT); |
587 | } |
588 | |
589 | void |
590 | ZSendInitDat(struct zmodem_session *zs) |
591 | { |
592 | zs->CRC = 0; |
593 | zs->PktOutCount = 0; |
594 | ZPutBin(zs, &(zs->PktOutCount), 0); |
595 | zs->CRC = UpdateCRC(0, zs->CRC); |
596 | |
597 | zs->PktOut[zs->PktOutCount] = ZDLE; |
598 | zs->PktOutCount++; |
599 | zs->PktOut[zs->PktOutCount] = ZCRCW; |
600 | zs->PktOutCount++; |
601 | zs->CRC = UpdateCRC(ZCRCW, zs->CRC); |
602 | |
603 | ZPutBin(zs, &(zs->PktOutCount), HIBYTE(zs->CRC)); |
604 | ZPutBin(zs, &(zs->PktOutCount), LOBYTE(zs->CRC)); |
605 | |
606 | zs->PktOutPtr = 0; |
607 | zs->Sending = true; |
608 | zs->ZState = Z_SendInitDat; |
609 | |
610 | #ifdef ZMODEM_DEBUG |
611 | logger_printf("[%s] ZSendInitDat", state_name(zs)); |
612 | #endif |
613 | } |
614 | |
615 | void |
616 | ZSendFileHdr(struct zmodem_session *zs) |
617 | { |
618 | zs->ZState = Z_SendFileHdr; |
619 | ZStoHdr(zs, 0); |
620 | if (zs->BinFlag) |
621 | zs->TxHdr[ZF0] = ZCBIN; /* binary file */ |
622 | else |
623 | zs->TxHdr[ZF0] = ZCNL; /* text file, convert newline */ |
624 | ZSbHdr(zs, ZFILE); |
625 | |
626 | #ifdef ZMODEM_DEBUG |
627 | logger_printf("[%s] ZSendFileHdr: %s", state_name(zs), |
628 | zs->BinFlag ? "binary" : "text"); |
629 | #endif |
630 | } |
631 | |
632 | void |
633 | ZSendFileDat(struct zmodem_session *zs) |
634 | { |
635 | short i, j; |
636 | |
637 | if (!zs->file) { |
638 | #ifdef ZMODEM_DEBUG |
639 | logger_printf("[%s] ZSendFileDat: no file, canceling", |
640 | state_name(zs)); |
641 | #endif |
642 | ZSendCancel(zs); |
643 | return; |
644 | } |
645 | |
646 | /* file name */ |
647 | strlcpy((char *)zs->PktOut, zs->file_name, sizeof(zs->PktOut)); |
648 | zs->PktOutCount = strlen((char *)zs->PktOut); |
649 | zs->CRC = 0; |
650 | for (i = 0; i <= zs->PktOutCount - 1; i++) |
651 | zs->CRC = UpdateCRC(zs->PktOut[i], zs->CRC); |
652 | ZPutBin(zs, &(zs->PktOutCount), 0); |
653 | zs->CRC = UpdateCRC(0, zs->CRC); |
654 | |
655 | /* |
656 | * ZFILE fields: |
657 | * size (dec) |
658 | * mtime (oct) |
659 | * mode (oct), |
660 | * serial (oct) |
661 | * files remaining (dec) |
662 | * bytes remaining (dec) |
663 | */ |
664 | snprintf((char *)zs->PktOut + zs->PktOutCount, |
665 | sizeof(zs->PktOut) - zs->PktOutCount, |
666 | "%lu 0 100644 0 0", zs->file_size); |
667 | j = strlen((char *)zs->PktOut + zs->PktOutCount); |
668 | for (i = 0; i <= j; i++) { |
669 | zs->CRC = UpdateCRC(zs->PktOut[zs->PktOutCount], zs->CRC); |
670 | zs->PktOutCount++; |
671 | } |
672 | |
673 | ZPutBin(zs, &(zs->PktOutCount), 0); |
674 | zs->CRC = UpdateCRC(0, zs->CRC); |
675 | zs->PktOut[zs->PktOutCount] = ZDLE; |
676 | zs->PktOutCount++; |
677 | zs->PktOut[zs->PktOutCount] = ZCRCW; |
678 | zs->PktOutCount++; |
679 | zs->CRC = UpdateCRC(ZCRCW, zs->CRC); |
680 | |
681 | ZPutBin(zs, &(zs->PktOutCount), HIBYTE(zs->CRC)); |
682 | ZPutBin(zs, &(zs->PktOutCount), LOBYTE(zs->CRC)); |
683 | |
684 | zs->PktOutPtr = 0; |
685 | zs->Sending = true; |
686 | zs->ZState = Z_SendFileDat; |
687 | |
688 | fseek(zs->file, 0, SEEK_SET); |
689 | |
690 | #ifdef ZMODEM_DEBUG |
691 | logger_printf("[%s] ZSendFileDat: ZFILE: ZF0=%x ZF1=%x " |
692 | "ZF2=%x file=%s size=%lu", state_name(zs), zs->TxHdr[ZF0], |
693 | zs->TxHdr[ZF1],zs->TxHdr[ZF2], zs->file_name, zs->file_size); |
694 | #endif |
695 | } |
696 | |
697 | void |
698 | ZSendDataHdr(struct zmodem_session *zs) |
699 | { |
700 | zs->ZState = Z_SendDataHdr; |
701 | ZStoHdr(zs, zs->Pos); |
702 | ZSbHdr(zs, ZDATA); |
703 | } |
704 | |
705 | void |
706 | ZSendDataDat(struct zmodem_session *zs) |
707 | { |
708 | short c; |
709 | unsigned char b; |
710 | |
711 | if (zs->Pos >= zs->file_size) { |
712 | #ifdef ZMODEM_DEBUG |
713 | logger_printf("[%s] ZSendDataDat: pos %lu >= file size %lu, EOFing", |
714 | state_name(zs), zs->Pos, zs->file_size); |
715 | #endif |
716 | zs->Pos = zs->file_size; |
717 | ZSendEOF(zs); |
718 | fclose(zs->file); |
719 | zs->file = NULL; |
720 | return; |
721 | } |
722 | |
723 | if (zs->Pos != ftell(zs->file)) |
724 | fseek(zs->file, zs->Pos, SEEK_SET); |
725 | |
726 | zs->CRC = 0; |
727 | zs->PktOutCount = 0; |
728 | do { |
729 | c = fread(&b, 1, 1, zs->file); |
730 | if (c > 0) { |
731 | ZPutBin(zs, &(zs->PktOutCount), b); |
732 | zs->CRC = UpdateCRC(b, zs->CRC); |
733 | } |
734 | } while ((c != 0) && (zs->PktOutCount <= zs->MaxDataLen - 2)); |
735 | |
736 | zs->Pos = ftell(zs->file); |
737 | |
738 | zs->PktOut[zs->PktOutCount] = ZDLE; |
739 | zs->PktOutCount++; |
740 | if (zs->Pos >= zs->file_size) |
741 | b = ZCRCE; |
742 | else if ((zs->WinSize >= 0) && (zs->Pos - zs->LastPos > zs->WinSize)) |
743 | b = ZCRCQ; |
744 | else |
745 | b = ZCRCG; |
746 | zs->PktOut[zs->PktOutCount] = b; |
747 | zs->PktOutCount++; |
748 | zs->CRC = UpdateCRC(b, zs->CRC); |
749 | |
750 | ZPutBin(zs, &(zs->PktOutCount), HIBYTE(zs->CRC)); |
751 | ZPutBin(zs, &(zs->PktOutCount), LOBYTE(zs->CRC)); |
752 | |
753 | zs->PktOutPtr = 0; |
754 | zs->Sending = true; |
755 | if (b == ZCRCQ) |
756 | zs->ZState = Z_SendDataDat2; /* wait for response from receiver */ |
757 | else |
758 | zs->ZState = Z_SendDataDat; |
759 | |
760 | ZResetTimeout(zs, zs->TimeOut); |
761 | |
762 | #ifdef ZMODEM_DEBUG |
763 | logger_printf("[%s] ZSendDataDat: pos=%ld", state_name(zs), zs->Pos); |
764 | #endif |
765 | } |
766 | |
767 | bool |
768 | ZInit(struct zmodem_session *zs) |
769 | { |
770 | zs->CtlEsc = false; |
771 | zs->MaxDataLen = ZMODEM_BLOCK_SIZE; |
772 | zs->WinSize = 32767; |
773 | |
774 | if (zs->ZMode == IdZAutoR || zs->ZMode == IdZAutoS) { |
775 | if (zs->ZMode == IdZAutoR) { |
776 | zs->ZMode = IdZReceive; |
777 | session_output(zs->session, (const char *)'0', 1); |
778 | } else { |
779 | zs->ZMode = IdZSend; |
780 | session_output(zs->session, (const char *)'1', 1); |
781 | } |
782 | session_output(zs->session, (const char *)'0', 1); |
783 | session_output(zs->session, (const char *)'B', 1); |
784 | session_output(zs->session, (const char *)ZDLE, 1); |
785 | session_output(zs->session, (const char *)ZPAD, 1); |
786 | } |
787 | |
788 | zs->PktOutCount = 0; |
789 | zs->Pos = 0; |
790 | zs->LastPos = 0; |
791 | zs->ZPktState = Z_PktGetPAD; |
792 | zs->Sending = false; |
793 | zs->LastSent = 0; |
794 | zs->CanCount = 5; |
795 | |
796 | if (zs->MaxDataLen <= 0) |
797 | zs->MaxDataLen = ZMODEM_BLOCK_SIZE; |
798 | if (zs->MaxDataLen < 64) |
799 | zs->MaxDataLen = 64; |
800 | if (zs->MaxDataLen > ZMODEM_BLOCK_SIZE) |
801 | zs->MaxDataLen = ZMODEM_BLOCK_SIZE; |
802 | |
803 | zs->TimeOut = ZMODEM_TIMEOUT; |
804 | ZResetTimeout(zs, zs->TimeOut); |
805 | |
806 | #ifdef ZMODEM_DEBUG |
807 | logger_printf("[%s] ZInit: %s", state_name(zs), |
808 | zs->ZMode == IdZReceive ? "receive" : "send"); |
809 | #endif |
810 | |
811 | switch (zs->ZMode) { |
812 | case IdZReceive: |
813 | zs->ZState = Z_RecvInit; |
814 | /* give the user extra time to pick a file */ |
815 | ZResetTimeout(zs, zs->TimeOut * 3); |
816 | ZSendRInit(zs); |
817 | break; |
818 | case IdZSend: |
819 | zs->ZState = Z_SendInit; |
820 | ZSendRQInit(zs); |
821 | break; |
822 | } |
823 | |
824 | return true; |
825 | } |
826 | |
827 | void |
828 | ZTimeOutProc(struct zmodem_session *zs) |
829 | { |
830 | #ifdef ZMODEM_DEBUG |
831 | logger_printf("[%s] ZTimeOutProc", state_name(zs)); |
832 | #endif |
833 | |
834 | switch (zs->ZState) { |
835 | case Z_RecvInit: |
836 | ZSendRInit(zs); |
837 | break; |
838 | case Z_RecvInit2: |
839 | ZSendACK(zs); /* Ack for ZSINIT */ |
840 | break; |
841 | case Z_RecvData: |
842 | ZSendRPOS(zs); |
843 | break; |
844 | case Z_RecvFIN: |
845 | zs->ZState = Z_End; |
846 | break; |
847 | } |
848 | } |
849 | |
850 | bool |
851 | ZCheckHdr(struct zmodem_session *zs) |
852 | { |
853 | short i; |
854 | bool ok; |
855 | |
856 | if (zs->CRC32) { |
857 | zs->CRC3 = 0xFFFFFFFF; |
858 | for (i = 0; i <= 8; i++) |
859 | zs->CRC3 = UpdateCRC32(zs->PktIn[i], zs->CRC3); |
860 | ok = (zs->CRC3 == 0xDEBB20E3); |
861 | } else { |
862 | zs->CRC = 0; |
863 | for (i = 0; i <= 6; i++) |
864 | zs->CRC = UpdateCRC(zs->PktIn[i], zs->CRC); |
865 | ok = (zs->CRC == 0); |
866 | } |
867 | |
868 | if (ok) { |
869 | #ifdef ZMODEM_DEBUG |
870 | logger_printf("[%s] ZCheckHdr: CRC%s ok", state_name(zs), |
871 | zs->CRC32 ? "32" : "16"); |
872 | #endif |
873 | } else { |
874 | #ifdef ZMODEM_DEBUG |
875 | if (zs->CRC32) |
876 | logger_printf("[%s] ZCheckHdr: CRC32 check failed " |
877 | "(0x%lx != 0xDEBB20E3)", state_name(zs), zs->CRC3); |
878 | else |
879 | logger_printf("[%s] ZCheckHdr: CRC16 check failed " |
880 | "(0x%x != 0x0)", state_name(zs), zs->CRC); |
881 | #endif |
882 | switch (zs->ZState) { |
883 | case Z_RecvInit: |
884 | ZSendRInit(zs); |
885 | break; |
886 | case Z_RecvData: |
887 | ZSendRPOS(zs); |
888 | break; |
889 | } |
890 | } |
891 | zs->RxType = zs->PktIn[0]; |
892 | for (i = 1; i <= 4; i++) |
893 | zs->RxHdr[i - 1] = zs->PktIn[i]; |
894 | |
895 | return ok; |
896 | } |
897 | |
898 | void |
899 | ZParseRInit(struct zmodem_session *zs) |
900 | { |
901 | short max; |
902 | |
903 | if ((zs->ZState != Z_SendInit) && (zs->ZState != Z_SendEOF)) { |
904 | #ifdef ZMODEM_DEBUG |
905 | logger_printf("[%s] ZParseRInit: not in Init or EOF", |
906 | state_name(zs)); |
907 | #endif |
908 | return; |
909 | } |
910 | |
911 | if (!zs->file) { |
912 | #ifdef ZMODEM_DEBUG |
913 | logger_printf("[%s] ZParseRInit: no file, FINing", |
914 | state_name(zs)); |
915 | #endif |
916 | zs->ZState = Z_SendFIN; |
917 | ZSendFIN(zs); |
918 | return; |
919 | } |
920 | |
921 | if (zs->CtlEsc) { |
922 | if ((zs->RxHdr[ZF0] & ESCCTL) == 0) { |
923 | zs->ZState = Z_SendInitHdr; |
924 | ZSendInitHdr(zs); |
925 | return; |
926 | } |
927 | } else |
928 | zs->CtlEsc = (zs->RxHdr[ZF0] & ESCCTL) != 0; |
929 | |
930 | max = (zs->RxHdr[ZP1] << 8) + zs->RxHdr[ZP0]; |
931 | if (max <= 0) |
932 | max = ZMODEM_BLOCK_SIZE; |
933 | if (zs->MaxDataLen > max) |
934 | zs->MaxDataLen = max; |
935 | |
936 | #ifdef ZMODEM_DEBUG |
937 | logger_printf("[%s] ZParseRInit: max data len %d", state_name(zs), |
938 | zs->MaxDataLen); |
939 | #endif |
940 | |
941 | zs->ZState = Z_SendFileHdr; |
942 | ZSendFileHdr(zs); |
943 | } |
944 | |
945 | bool |
946 | ZParseSInit(struct zmodem_session *zs) |
947 | { |
948 | if (zs->ZState != Z_RecvInit) { |
949 | #ifdef ZMODEM_DEBUG |
950 | logger_printf("[%s] ZParseSInit: state not RecvInit", |
951 | state_name(zs)); |
952 | #endif |
953 | return false; |
954 | } |
955 | |
956 | zs->ZState = Z_RecvInit2; |
957 | zs->CtlEsc = zs->CtlEsc || ((zs->RxHdr[ZF0] & ESCCTL) != 0); |
958 | |
959 | return true; |
960 | } |
961 | |
962 | void |
963 | ZParseHdr(struct zmodem_session *zs) |
964 | { |
965 | #ifdef ZMODEM_DEBUG |
966 | logger_printf("[%s] ZParseHdr: RxType %s", state_name(zs), |
967 | hdrtype_name(zs->RxType)); |
968 | #endif |
969 | |
970 | switch (zs->RxType) { |
971 | case ZRQINIT: |
972 | if (zs->ZState == Z_RecvInit) |
973 | ZSendRInit(zs); |
974 | break; |
975 | case ZRINIT: |
976 | ZParseRInit(zs); |
977 | break; |
978 | case ZSINIT: |
979 | zs->ZPktState = Z_PktGetData; |
980 | if (zs->ZState == Z_RecvInit) |
981 | ZResetTimeout(zs, zs->TimeOut); |
982 | break; |
983 | case ZACK: |
984 | switch (zs->ZState) { |
985 | case Z_SendInitDat: |
986 | ZSendFileHdr(zs); |
987 | break; |
988 | case Z_SendDataDat2: |
989 | zs->LastPos = ZRclHdr(zs); |
990 | ZResetTimeout(zs, zs->TimeOut); |
991 | if (zs->Pos == zs->LastPos) |
992 | ZSendDataDat(zs); |
993 | else { |
994 | zs->Pos = zs->LastPos; |
995 | ZSendDataHdr(zs); |
996 | } |
997 | break; |
998 | } |
999 | break; |
1000 | case ZFILE: |
1001 | zs->ZPktState = Z_PktGetData; |
1002 | if ((zs->ZState == Z_RecvInit) || (zs->ZState == Z_RecvInit2)) { |
1003 | zs->BinFlag = (zs->RxHdr[ZF0] != ZCNL); |
1004 | ZResetTimeout(zs, zs->TimeOut); |
1005 | } |
1006 | break; |
1007 | case ZSKIP: |
1008 | if (zs->file) { |
1009 | fclose(zs->file); |
1010 | /* |
1011 | * If you try to send a file that exists on the server |
1012 | * side, ZParseRInit () will double close, so |
1013 | * Drop the flag here. (2007.12.20 yutaka) |
1014 | */ |
1015 | zs->file = NULL; |
1016 | } |
1017 | ZStoHdr(zs, 0); |
1018 | if (zs->CtlEsc) |
1019 | zs->RxHdr[ZF0] = ESCCTL; |
1020 | zs->ZState = Z_SendInit; |
1021 | ZParseRInit(zs); |
1022 | break; |
1023 | case ZNAK: |
1024 | switch (zs->ZState) { |
1025 | case Z_SendInitHdr: |
1026 | case Z_SendInitDat: |
1027 | ZSendInitHdr(zs); |
1028 | break; |
1029 | case Z_SendFileHdr: |
1030 | case Z_SendFileDat: |
1031 | ZSendFileHdr(zs); |
1032 | break; |
1033 | } |
1034 | break; |
1035 | case ZABORT: |
1036 | case ZFERR: |
1037 | if (zs->ZMode == IdZSend) { |
1038 | zs->ZState = Z_SendFIN; |
1039 | ZSendFIN(zs); |
1040 | } |
1041 | break; |
1042 | case ZFIN: |
1043 | if (zs->ZMode == IdZReceive) { |
1044 | #if 0 |
1045 | zs->ZState = Z_RecvFIN; |
1046 | #else |
1047 | /* we only want to receive one file per session, just end */ |
1048 | zs->ZState = Z_End; |
1049 | #endif |
1050 | ZSendFIN(zs); |
1051 | zs->CanCount = 2; |
1052 | ZResetTimeout(zs, zs->TimeOut); |
1053 | } else { |
1054 | zs->ZState = Z_End; |
1055 | session_output(zs->session, (const char *)"OO", 2); |
1056 | } |
1057 | break; |
1058 | case ZRPOS: |
1059 | switch (zs->ZState) { |
1060 | case Z_SendFileDat: |
1061 | case Z_SendDataHdr: |
1062 | case Z_SendDataDat: |
1063 | case Z_SendDataDat2: |
1064 | case Z_SendEOF: |
1065 | zs->Pos = ZRclHdr(zs); |
1066 | zs->LastPos = zs->Pos; |
1067 | #ifdef ZMODEM_DEBUG |
1068 | logger_printf("[%s] ZParseHdr: pos=%ld", state_name(zs), |
1069 | zs->Pos); |
1070 | #endif |
1071 | ZSendDataHdr(zs); |
1072 | break; |
1073 | } |
1074 | break; |
1075 | case ZDATA: |
1076 | if (zs->Pos != ZRclHdr(zs)) { |
1077 | ZSendRPOS(zs); |
1078 | return; |
1079 | } |
1080 | ZResetTimeout(zs, zs->TimeOut); |
1081 | zs->ZPktState = Z_PktGetData; |
1082 | break; |
1083 | case ZEOF: |
1084 | if (zs->Pos != ZRclHdr(zs)) { |
1085 | #ifdef ZMODEM_DEBUG |
1086 | logger_printf("[%s] ZParseHdr: ZEOF but pos %ld != received %ld", |
1087 | state_name(zs), zs->Pos, ZRclHdr(zs)); |
1088 | #endif |
1089 | ZSendRPOS(zs); |
1090 | return; |
1091 | } |
1092 | |
1093 | if (zs->file) { |
1094 | #ifdef ZMODEM_DEBUG |
1095 | logger_printf("[%s] ZParseHdr: finished with file at %ld, " |
1096 | "closing", state_name(zs), zs->Pos); |
1097 | #endif |
1098 | ZSendRPOS(zs); |
1099 | if (zs->CRRecv) { |
1100 | zs->CRRecv = false; |
1101 | fwrite("\r", 1, 1, zs->file); |
1102 | } |
1103 | fclose(zs->file); |
1104 | zs->file = NULL; |
1105 | } |
1106 | zs->ZState = Z_RecvInit; |
1107 | ZSendRInit(zs); |
1108 | break; |
1109 | } |
1110 | zs->Quoted = false; |
1111 | zs->CRC = 0; |
1112 | zs->CRC3 = 0xFFFFFFFF; |
1113 | zs->PktInPtr = 0; |
1114 | zs->PktInCount = 0; |
1115 | } |
1116 | |
1117 | bool |
1118 | ZCreateTemporaryFile(struct zmodem_session *zs) |
1119 | { |
1120 | if (zs->upload_file_path[0] == '\0') { |
1121 | #ifdef ZMODEM_DEBUG |
1122 | logger_printf("[%s] ZCreateTemporaryFile: no file path", |
1123 | state_name(zs)); |
1124 | #endif |
1125 | return false; |
1126 | } |
1127 | |
1128 | zs->file = fopen(zs->upload_file_path, "wb+"); |
1129 | if (zs->file == NULL) { |
1130 | #ifdef ZMODEM_DEBUG |
1131 | logger_printf("[%s] ZCreateTemporaryFile: opening %s failed", |
1132 | state_name(zs), zs->upload_file_path); |
1133 | #endif |
1134 | return false; |
1135 | } |
1136 | |
1137 | #ifdef ZMODEM_DEBUG |
1138 | logger_printf("[%s] ZCreateTemporaryFile: %s", state_name(zs), |
1139 | zs->upload_file_path); |
1140 | #endif |
1141 | |
1142 | return true; |
1143 | } |
1144 | |
1145 | bool |
1146 | ZParseFile(struct zmodem_session *zs) |
1147 | { |
1148 | unsigned char b; |
1149 | short i; |
1150 | char *p, *tfile_name; |
1151 | unsigned long modtime, file_size; |
1152 | short mode; |
1153 | short ret; |
1154 | |
1155 | if ((zs->ZState != Z_RecvInit) && (zs->ZState != Z_RecvInit2)) { |
1156 | #ifdef ZMODEM_DEBUG |
1157 | logger_printf("[%s] ZParseFile: state not RecvInit/2", |
1158 | state_name(zs)); |
1159 | #endif |
1160 | return false; |
1161 | } |
1162 | |
1163 | zs->CRRecv = false; |
1164 | |
1165 | /* file name */ |
1166 | zs->PktIn[zs->PktInPtr] = '\0'; |
1167 | |
1168 | /* don't allow paths in file name */ |
1169 | tfile_name = (char *)&zs->PktIn; |
1170 | i = 0; |
1171 | while (tfile_name[i] != '\0') { |
1172 | if (tfile_name[i] == '/') { |
1173 | tfile_name += i + 1; |
1174 | i = 0; |
1175 | } |
1176 | i++; |
1177 | } |
1178 | |
1179 | #ifdef ZMODEM_DEBUG |
1180 | logger_printf("[%s] ZParseFile: path \"%s\" -> \"%s\"", |
1181 | state_name(zs), (char *)&zs->PktIn, tfile_name); |
1182 | #endif |
1183 | |
1184 | if (tfile_name[0] == '\0') |
1185 | return false; |
1186 | |
1187 | strlcpy(zs->file_name, tfile_name, sizeof(zs->file_name)); |
1188 | |
1189 | if (!ZCreateTemporaryFile(zs)) { |
1190 | zs->file_name[0] = '\0'; |
1191 | return false; |
1192 | } |
1193 | |
1194 | /* file size */ |
1195 | i = strlen((char *)zs->PktIn) + 1; |
1196 | file_size = 0; |
1197 | do { |
1198 | b = zs->PktIn[i]; |
1199 | if ((b >= 0x30) && (b <= 0x39)) |
1200 | file_size = (file_size * 10) + b - 0x30; |
1201 | i++; |
1202 | } while ((b >= 0x30) && (b <= 0x39)); |
1203 | zs->file_size = file_size; |
1204 | |
1205 | /* file mtime */ |
1206 | p = (char *)zs->PktIn + i; |
1207 | zs->file_mtime = 0; |
1208 | if (*p) { |
1209 | ret = sscanf(p, "%lo%o", &modtime, &mode); |
1210 | if (ret >= 1) |
1211 | zs->file_mtime = modtime; |
1212 | } |
1213 | |
1214 | zs->Pos = 0; |
1215 | fseek(zs->file, 0, SEEK_SET); |
1216 | |
1217 | zs->ZState = Z_RecvData; |
1218 | ZStoHdr(zs, 0); |
1219 | |
1220 | /* set timeout for data */ |
1221 | ZResetTimeout(zs, zs->TimeOut); |
1222 | |
1223 | return true; |
1224 | } |
1225 | |
1226 | bool |
1227 | ZWriteData(struct zmodem_session *zs) |
1228 | { |
1229 | short i; |
1230 | unsigned char b; |
1231 | |
1232 | if (zs->ZState != Z_RecvData) { |
1233 | #ifdef ZMODEM_DEBUG |
1234 | logger_printf("[%s] ZWriteData: state != RecvData", state_name(zs)); |
1235 | #endif |
1236 | return false; |
1237 | } |
1238 | |
1239 | zs->TimeOutAt = 0; |
1240 | |
1241 | if (zs->BinFlag) |
1242 | fwrite(zs->PktIn, zs->PktInPtr, 1, zs->file); |
1243 | else |
1244 | for (i = 0; i <= zs->PktInPtr - 1; i++) { |
1245 | b = zs->PktIn[i]; |
1246 | if ((b == 0x0A) && (!zs->CRRecv)) |
1247 | fwrite("\015", 1, 1, zs->file); |
1248 | if (zs->CRRecv && (b != 0x0A)) |
1249 | fwrite("\012", 1, 1, zs->file); |
1250 | zs->CRRecv = b == 0x0D; |
1251 | fwrite(&b, 1, 1, zs->file); |
1252 | } |
1253 | |
1254 | #ifdef ZMODEM_DEBUG |
1255 | logger_printf("[%s] ZWriteData: wrote %d byte(s) at %ld", |
1256 | state_name(zs), zs->PktInPtr, zs->Pos); |
1257 | #endif |
1258 | |
1259 | zs->Pos += zs->PktInPtr; |
1260 | fseek(zs->file, zs->Pos, SEEK_SET); |
1261 | ZStoHdr(zs, zs->Pos); |
1262 | |
1263 | /* set timeout for data */ |
1264 | ZResetTimeout(zs, zs->TimeOut); |
1265 | |
1266 | return true; |
1267 | } |
1268 | |
1269 | void |
1270 | ZCheckData(struct zmodem_session *zs) |
1271 | { |
1272 | bool ok; |
1273 | |
1274 | /* check CRC */ |
1275 | if ((zs->CRC32 && zs->CRC3 != 0xDEBB20E3) || |
1276 | (!zs->CRC32 && zs->CRC != 0)) { |
1277 | #ifdef ZMODEM_DEBUG |
1278 | logger_printf("[%s] ZCheckData: CRC%s failed", state_name(zs), |
1279 | zs->CRC32 ? "32" : "16"); |
1280 | #endif |
1281 | switch (zs->ZState) { |
1282 | case Z_RecvInit: |
1283 | case Z_RecvInit2: |
1284 | ZSendNAK(zs); |
1285 | break; |
1286 | case Z_RecvData: |
1287 | ZSendRPOS(zs); |
1288 | break; |
1289 | } |
1290 | zs->ZPktState = Z_PktGetPAD; |
1291 | return; |
1292 | } |
1293 | |
1294 | /* parse data */ |
1295 | switch (zs->RxType) { |
1296 | case ZSINIT: |
1297 | ok = ZParseSInit(zs); |
1298 | break; |
1299 | case ZFILE: |
1300 | ok = ZParseFile(zs); |
1301 | break; |
1302 | case ZDATA: |
1303 | ok = ZWriteData(zs); |
1304 | break; |
1305 | default: |
1306 | ok = false; |
1307 | } |
1308 | |
1309 | if (!ok) { |
1310 | #ifdef ZMODEM_DEBUG |
1311 | logger_printf("[%s] ZCheckData: bad RxType %s, skipping", |
1312 | state_name(zs), hdrtype_name(zs->RxType)); |
1313 | #endif |
1314 | zs->ZPktState = Z_PktGetPAD; |
1315 | zs->ZState = Z_SendSkip; |
1316 | ZSendSkip(zs); |
1317 | return; |
1318 | } |
1319 | |
1320 | if (zs->RxType == ZFILE) |
1321 | ZShHdr(zs, ZRPOS); |
1322 | |
1323 | /* next state */ |
1324 | switch (zs->TERM) { |
1325 | case ZCRCE: |
1326 | zs->ZPktState = Z_PktGetPAD; |
1327 | break; |
1328 | case ZCRCG: |
1329 | zs->ZPktState = Z_PktGetData; |
1330 | break; |
1331 | case ZCRCQ: |
1332 | zs->ZPktState = Z_PktGetData; |
1333 | if (zs->RxType != ZFILE) |
1334 | ZShHdr(zs, ZACK); |
1335 | break; |
1336 | case ZCRCW: |
1337 | zs->ZPktState = Z_PktGetPAD; |
1338 | if (zs->RxType != ZFILE) |
1339 | ZShHdr(zs, ZACK); |
1340 | break; |
1341 | default: |
1342 | zs->ZPktState = Z_PktGetPAD; |
1343 | } |
1344 | |
1345 | #ifdef ZMODEM_DEBUG |
1346 | logger_printf("[%s] ZCheckData: TERM %s", state_name(zs), |
1347 | hdrtype_name(zs->TERM)); |
1348 | #endif |
1349 | |
1350 | if (zs->ZPktState == Z_PktGetData) { |
1351 | zs->Quoted = false; |
1352 | zs->CRC = 0; |
1353 | zs->CRC3 = 0xFFFFFFFF; |
1354 | zs->PktInPtr = 0; |
1355 | zs->PktInCount = 0; |
1356 | } |
1357 | } |
1358 | |
1359 | bool |
1360 | ZParse(struct zmodem_session *zs) |
1361 | { |
1362 | unsigned char b; |
1363 | short c; |
1364 | |
1365 | do { |
1366 | /* Send packet */ |
1367 | if (zs->Sending) { |
1368 | c = 1; |
1369 | while ((c > 0) && (zs->PktOutCount > 0)) { |
1370 | c = session_output(zs->session, |
1371 | (const char *)&(zs->PktOut[zs->PktOutPtr]), |
1372 | zs->PktOutCount); |
1373 | zs->PktOutPtr = zs->PktOutPtr + c; |
1374 | zs->PktOutCount = zs->PktOutCount - c; |
1375 | } |
1376 | if (zs->PktOutCount <= 0) |
1377 | zs->Sending = false; |
1378 | if ((zs->ZMode == IdZReceive) && (zs->PktOutCount > 0)) |
1379 | return true; |
1380 | } |
1381 | |
1382 | c = ZRead1Byte(zs, &b); |
1383 | while (c > 0) { |
1384 | if (zs->ZState == Z_RecvFIN) { |
1385 | if (b == 'O') |
1386 | zs->CanCount--; |
1387 | if (zs->CanCount <= 0) { |
1388 | zs->ZState = Z_End; |
1389 | return false; |
1390 | } |
1391 | } else { |
1392 | switch (b) { |
1393 | case ZDLE: |
1394 | zs->CanCount--; |
1395 | if (zs->CanCount <= 0) { |
1396 | zs->ZState = Z_End; |
1397 | return false; |
1398 | } |
1399 | break; |
1400 | default: |
1401 | zs->CanCount = 5; |
1402 | } |
1403 | } |
1404 | |
1405 | switch (zs->ZPktState) { |
1406 | case Z_PktGetPAD: |
1407 | switch (b) { |
1408 | case ZPAD: |
1409 | zs->ZPktState = Z_PktGetDLE; |
1410 | break; |
1411 | } |
1412 | break; |
1413 | case Z_PktGetDLE: |
1414 | switch (b) { |
1415 | case ZPAD: |
1416 | break; |
1417 | case ZDLE: |
1418 | zs->ZPktState = Z_PktHdrFrm; |
1419 | break; |
1420 | default: |
1421 | zs->ZPktState = Z_PktGetPAD; |
1422 | } |
1423 | break; |
1424 | case Z_PktHdrFrm: /* Get header format type */ |
1425 | switch (b) { |
1426 | case ZBIN: |
1427 | zs->CRC32 = false; |
1428 | zs->PktInCount = 7; |
1429 | zs->ZPktState = Z_PktGetBin; |
1430 | break; |
1431 | case ZHEX: |
1432 | zs->HexLo = false; |
1433 | zs->CRC32 = false; |
1434 | zs->PktInCount = 7; |
1435 | zs->ZPktState = Z_PktGetHex; |
1436 | break; |
1437 | case ZBIN32: |
1438 | zs->CRC32 = true; |
1439 | zs->PktInCount = 9; |
1440 | zs->ZPktState = Z_PktGetBin; |
1441 | break; |
1442 | default: |
1443 | zs->ZPktState = Z_PktGetPAD; |
1444 | } |
1445 | zs->Quoted = false; |
1446 | zs->PktInPtr = 0; |
1447 | break; |
1448 | case Z_PktGetBin: |
1449 | switch (b) { |
1450 | case ZDLE: |
1451 | zs->Quoted = true; |
1452 | break; |
1453 | default: |
1454 | if (zs->Quoted) { |
1455 | switch (b) { |
1456 | case ZRUB0: |
1457 | b = 0x7f; |
1458 | break; |
1459 | case ZRUB1: |
1460 | b = 0xff; |
1461 | break; |
1462 | default: |
1463 | b = b ^ 0x40; |
1464 | } |
1465 | zs->Quoted = false; |
1466 | } |
1467 | |
1468 | zs->PktIn[zs->PktInPtr] = b; |
1469 | zs->PktInPtr++; |
1470 | zs->PktInCount--; |
1471 | if (zs->PktInCount == 0) { |
1472 | zs->ZPktState = Z_PktGetPAD; |
1473 | if (ZCheckHdr(zs)) |
1474 | ZParseHdr(zs); |
1475 | } |
1476 | } |
1477 | break; |
1478 | case Z_PktGetHex: |
1479 | if (b <= '9') |
1480 | b = b - 0x30; |
1481 | else if ((b >= 'a') && (b <= 'f')) |
1482 | b = b - 0x57; |
1483 | else { |
1484 | zs->ZPktState = Z_PktGetPAD; |
1485 | return true; |
1486 | } |
1487 | |
1488 | if (zs->HexLo) { |
1489 | zs->PktIn[zs->PktInPtr] = |
1490 | zs->PktIn[zs->PktInPtr] + b; |
1491 | zs->HexLo = false; |
1492 | zs->PktInPtr++; |
1493 | zs->PktInCount--; |
1494 | if (zs->PktInCount <= 0) { |
1495 | zs->ZPktState = Z_PktGetHexEOL; |
1496 | zs->PktInCount = 2; |
1497 | } |
1498 | } else { |
1499 | zs->PktIn[zs->PktInPtr] = b << 4; |
1500 | zs->HexLo = true; |
1501 | } |
1502 | break; |
1503 | case Z_PktGetHexEOL: |
1504 | zs->PktInCount--; |
1505 | if (zs->PktInCount <= 0) { |
1506 | zs->ZPktState = Z_PktGetPAD; |
1507 | if (ZCheckHdr(zs)) |
1508 | ZParseHdr(zs); |
1509 | } |
1510 | break; |
1511 | case Z_PktGetData: |
1512 | switch (b) { |
1513 | case ZDLE: |
1514 | zs->Quoted = true; |
1515 | break; |
1516 | default: |
1517 | if (zs->Quoted) { |
1518 | switch (b) { |
1519 | case ZCRCE: |
1520 | case ZCRCG: |
1521 | case ZCRCQ: |
1522 | case ZCRCW: |
1523 | zs->TERM = b; |
1524 | if (zs->CRC32) |
1525 | zs->PktInCount = 4; |
1526 | else |
1527 | zs->PktInCount = 2; |
1528 | zs->ZPktState = Z_PktGetCRC; |
1529 | break; |
1530 | case ZRUB0: |
1531 | b = 0x7F; |
1532 | break; |
1533 | case ZRUB1: |
1534 | b = 0xFF; |
1535 | break; |
1536 | default: |
1537 | b = b ^ 0x40; |
1538 | } |
1539 | zs->Quoted = false; |
1540 | } |
1541 | |
1542 | if (zs->CRC32) |
1543 | zs->CRC3 = UpdateCRC32(b, zs->CRC3); |
1544 | else |
1545 | zs->CRC = UpdateCRC(b, zs->CRC); |
1546 | |
1547 | if (zs->ZPktState == Z_PktGetData) { |
1548 | if (zs->PktInPtr < ZMODEM_BLOCK_SIZE) { |
1549 | zs->PktIn[zs->PktInPtr] = b; |
1550 | zs->PktInPtr++; |
1551 | } else |
1552 | zs->ZPktState = Z_PktGetPAD; |
1553 | } |
1554 | } |
1555 | break; |
1556 | case Z_PktGetCRC: |
1557 | switch (b) { |
1558 | case ZDLE: |
1559 | zs->Quoted = true; |
1560 | break; |
1561 | default: |
1562 | if (zs->Quoted) { |
1563 | switch (b) { |
1564 | case ZRUB0: |
1565 | b = 0x7F; |
1566 | break; |
1567 | case ZRUB1: |
1568 | b = 0xFF; |
1569 | break; |
1570 | default: |
1571 | b = b ^ 0x40; |
1572 | } |
1573 | zs->Quoted = false; |
1574 | } |
1575 | if (zs->CRC32) |
1576 | zs->CRC3 = UpdateCRC32(b, zs->CRC3); |
1577 | else |
1578 | zs->CRC = UpdateCRC(b, zs->CRC); |
1579 | zs->PktInCount--; |
1580 | if (zs->PktInCount <= 0) |
1581 | ZCheckData(zs); |
1582 | } |
1583 | break; |
1584 | } |
1585 | c = ZRead1Byte(zs, &b); |
1586 | } |
1587 | |
1588 | if (!zs->Sending) |
1589 | switch (zs->ZState) { |
1590 | case Z_SendInitHdr: |
1591 | ZSendInitDat(zs); |
1592 | break; |
1593 | case Z_SendFileHdr: |
1594 | ZSendFileDat(zs); |
1595 | break; |
1596 | case Z_SendDataHdr: |
1597 | case Z_SendDataDat: |
1598 | ZSendDataDat(zs); |
1599 | break; |
1600 | case Z_Cancel: |
1601 | zs->ZState = Z_End; |
1602 | break; |
1603 | } |
1604 | |
1605 | if (zs->Sending && (zs->PktOutCount > 0)) |
1606 | return true; |
1607 | } while (zs->Sending); |
1608 | |
1609 | if (zs->ZState == Z_End) |
1610 | return false; |
1611 | |
1612 | return true; |
1613 | } |
1614 | |
1615 | void |
1616 | ZCancel(struct zmodem_session *zs) |
1617 | { |
1618 | #ifdef ZMODEM_DEBUG |
1619 | logger_printf("[%s] ZCancel", state_name(zs)); |
1620 | #endif |
1621 | |
1622 | ZSendCancel(zs); |
1623 | } |
1624 | |
1625 | void |
1626 | ZDestroy(struct zmodem_session *zs) |
1627 | { |
1628 | #ifdef ZMODEM_DEBUG |
1629 | logger_printf("[%s] ZDestroy", state_name(zs)); |
1630 | #endif |
1631 | |
1632 | if (zs->file) |
1633 | fclose(zs->file); |
1634 | if (zs->upload_file_path) |
1635 | xfree(&zs->upload_file_path); |
1636 | xfree(&zs); |
1637 | } |