290
|
1
|
|
2 /*
|
|
3 * Copyright (C) Igor Sysoev
|
|
4 */
|
|
5
|
|
6
|
|
7 #include <ngx_config.h>
|
|
8 #include <ngx_core.h>
|
|
9 #include <ngx_event.h>
|
|
10 #include <ngx_mail.h>
|
|
11
|
|
12
|
|
13 ngx_int_t ngx_pop3_parse_command(ngx_mail_session_t *s)
|
|
14 {
|
|
15 u_char ch, *p, *c, c0, c1, c2, c3;
|
|
16 ngx_str_t *arg;
|
|
17 enum {
|
|
18 sw_start = 0,
|
|
19 sw_spaces_before_argument,
|
|
20 sw_argument,
|
|
21 sw_almost_done
|
|
22 } state;
|
|
23
|
|
24 state = s->state;
|
|
25
|
|
26 for (p = s->buffer->pos; p < s->buffer->last; p++) {
|
|
27 ch = *p;
|
|
28
|
|
29 switch (state) {
|
|
30
|
|
31 /* POP3 command */
|
|
32 case sw_start:
|
|
33 if (ch == ' ' || ch == CR || ch == LF) {
|
|
34 c = s->buffer->start;
|
|
35
|
|
36 if (p - c == 4) {
|
|
37
|
|
38 c0 = ngx_toupper(c[0]);
|
|
39 c1 = ngx_toupper(c[1]);
|
|
40 c2 = ngx_toupper(c[2]);
|
|
41 c3 = ngx_toupper(c[3]);
|
|
42
|
|
43 if (c0 == 'U' && c1 == 'S' && c2 == 'E' && c3 == 'R')
|
|
44 {
|
|
45 s->command = NGX_POP3_USER;
|
|
46
|
|
47 } else if (c0 == 'P' && c1 == 'A' && c2 == 'S' && c3 == 'S')
|
|
48 {
|
|
49 s->command = NGX_POP3_PASS;
|
|
50
|
|
51 } else if (c0 == 'A' && c1 == 'P' && c2 == 'O' && c3 == 'P')
|
|
52 {
|
|
53 s->command = NGX_POP3_APOP;
|
|
54
|
|
55 } else if (c0 == 'Q' && c1 == 'U' && c2 == 'I' && c3 == 'T')
|
|
56 {
|
|
57 s->command = NGX_POP3_QUIT;
|
|
58
|
|
59 } else if (c0 == 'C' && c1 == 'A' && c2 == 'P' && c3 == 'A')
|
|
60 {
|
|
61 s->command = NGX_POP3_CAPA;
|
|
62
|
|
63 } else if (c0 == 'A' && c1 == 'U' && c2 == 'T' && c3 == 'H')
|
|
64 {
|
|
65 s->command = NGX_POP3_AUTH;
|
|
66
|
|
67 } else if (c0 == 'N' && c1 == 'O' && c2 == 'O' && c3 == 'P')
|
|
68 {
|
|
69 s->command = NGX_POP3_NOOP;
|
|
70 #if (NGX_MAIL_SSL)
|
|
71 } else if (c0 == 'S' && c1 == 'T' && c2 == 'L' && c3 == 'S')
|
|
72 {
|
|
73 s->command = NGX_POP3_STLS;
|
|
74 #endif
|
|
75 } else {
|
|
76 goto invalid;
|
|
77 }
|
|
78
|
|
79 } else {
|
|
80 goto invalid;
|
|
81 }
|
|
82
|
|
83 switch (ch) {
|
|
84 case ' ':
|
|
85 state = sw_spaces_before_argument;
|
|
86 break;
|
|
87 case CR:
|
|
88 state = sw_almost_done;
|
|
89 break;
|
|
90 case LF:
|
|
91 goto done;
|
|
92 }
|
|
93 break;
|
|
94 }
|
|
95
|
|
96 if ((ch < 'A' || ch > 'Z') && (ch < 'a' || ch > 'z')) {
|
|
97 goto invalid;
|
|
98 }
|
|
99
|
|
100 break;
|
|
101
|
|
102 case sw_spaces_before_argument:
|
|
103 switch (ch) {
|
|
104 case ' ':
|
|
105 break;
|
|
106 case CR:
|
|
107 state = sw_almost_done;
|
|
108 s->arg_end = p;
|
|
109 break;
|
|
110 case LF:
|
|
111 s->arg_end = p;
|
|
112 goto done;
|
|
113 default:
|
|
114 if (s->args.nelts <= 2) {
|
|
115 state = sw_argument;
|
|
116 s->arg_start = p;
|
|
117 break;
|
|
118 }
|
|
119 goto invalid;
|
|
120 }
|
|
121 break;
|
|
122
|
|
123 case sw_argument:
|
|
124 switch (ch) {
|
|
125
|
|
126 case ' ':
|
|
127
|
|
128 /*
|
|
129 * the space should be considered as part of the at username
|
|
130 * or password, but not of argument in other commands
|
|
131 */
|
|
132
|
|
133 if (s->command == NGX_POP3_USER
|
|
134 || s->command == NGX_POP3_PASS)
|
|
135 {
|
|
136 break;
|
|
137 }
|
|
138
|
|
139 /* fall through */
|
|
140
|
|
141 case CR:
|
|
142 case LF:
|
|
143 arg = ngx_array_push(&s->args);
|
|
144 if (arg == NULL) {
|
|
145 return NGX_ERROR;
|
|
146 }
|
|
147 arg->len = p - s->arg_start;
|
|
148 arg->data = s->arg_start;
|
|
149 s->arg_start = NULL;
|
|
150
|
|
151 switch (ch) {
|
|
152 case ' ':
|
|
153 state = sw_spaces_before_argument;
|
|
154 break;
|
|
155 case CR:
|
|
156 state = sw_almost_done;
|
|
157 break;
|
|
158 case LF:
|
|
159 goto done;
|
|
160 }
|
|
161 break;
|
|
162
|
|
163 default:
|
|
164 break;
|
|
165 }
|
|
166 break;
|
|
167
|
|
168 case sw_almost_done:
|
|
169 switch (ch) {
|
|
170 case LF:
|
|
171 goto done;
|
|
172 default:
|
|
173 goto invalid;
|
|
174 }
|
|
175 }
|
|
176 }
|
|
177
|
|
178 s->buffer->pos = p;
|
|
179 s->state = state;
|
|
180
|
|
181 return NGX_AGAIN;
|
|
182
|
|
183 done:
|
|
184
|
|
185 s->buffer->pos = p + 1;
|
|
186
|
|
187 if (s->arg_start) {
|
|
188 arg = ngx_array_push(&s->args);
|
|
189 if (arg == NULL) {
|
|
190 return NGX_ERROR;
|
|
191 }
|
|
192 arg->len = s->arg_end - s->arg_start;
|
|
193 arg->data = s->arg_start;
|
|
194 s->arg_start = NULL;
|
|
195 }
|
|
196
|
|
197 s->state = (s->command != NGX_POP3_AUTH) ? sw_start : sw_argument;
|
|
198
|
|
199 return NGX_OK;
|
|
200
|
|
201 invalid:
|
|
202
|
|
203 s->state = sw_start;
|
|
204 s->arg_start = NULL;
|
|
205
|
|
206 return NGX_MAIL_PARSE_INVALID_COMMAND;
|
|
207 }
|
|
208
|
|
209
|
|
210 ngx_int_t ngx_imap_parse_command(ngx_mail_session_t *s)
|
|
211 {
|
|
212 u_char ch, *p, *c;
|
|
213 ngx_str_t *arg;
|
|
214 enum {
|
|
215 sw_start = 0,
|
|
216 sw_spaces_before_command,
|
|
217 sw_command,
|
|
218 sw_spaces_before_argument,
|
|
219 sw_argument,
|
|
220 sw_backslash,
|
|
221 sw_literal,
|
|
222 sw_no_sync_literal_argument,
|
|
223 sw_start_literal_argument,
|
|
224 sw_literal_argument,
|
|
225 sw_end_literal_argument,
|
|
226 sw_almost_done
|
|
227 } state;
|
|
228
|
|
229 state = s->state;
|
|
230
|
|
231 for (p = s->buffer->pos; p < s->buffer->last; p++) {
|
|
232 ch = *p;
|
|
233
|
|
234 switch (state) {
|
|
235
|
|
236 /* IMAP tag */
|
|
237 case sw_start:
|
|
238 switch (ch) {
|
|
239 case ' ':
|
|
240 s->tag.len = p - s->buffer->start + 1;
|
|
241 s->tag.data = s->buffer->start;
|
|
242 state = sw_spaces_before_command;
|
|
243 break;
|
|
244 case CR:
|
|
245 s->state = sw_start;
|
|
246 return NGX_MAIL_PARSE_INVALID_COMMAND;
|
|
247 case LF:
|
|
248 s->state = sw_start;
|
|
249 return NGX_MAIL_PARSE_INVALID_COMMAND;
|
|
250 }
|
|
251 break;
|
|
252
|
|
253 case sw_spaces_before_command:
|
|
254 switch (ch) {
|
|
255 case ' ':
|
|
256 break;
|
|
257 case CR:
|
|
258 s->state = sw_start;
|
|
259 return NGX_MAIL_PARSE_INVALID_COMMAND;
|
|
260 case LF:
|
|
261 s->state = sw_start;
|
|
262 return NGX_MAIL_PARSE_INVALID_COMMAND;
|
|
263 default:
|
|
264 s->cmd_start = p;
|
|
265 state = sw_command;
|
|
266 break;
|
|
267 }
|
|
268 break;
|
|
269
|
|
270 case sw_command:
|
|
271 if (ch == ' ' || ch == CR || ch == LF) {
|
|
272
|
|
273 c = s->cmd_start;
|
|
274
|
|
275 switch (p - c) {
|
|
276
|
|
277 case 4:
|
|
278 if ((c[0] == 'N' || c[0] == 'n')
|
|
279 && (c[1] == 'O'|| c[1] == 'o')
|
|
280 && (c[2] == 'O'|| c[2] == 'o')
|
|
281 && (c[3] == 'P'|| c[3] == 'p'))
|
|
282 {
|
|
283 s->command = NGX_IMAP_NOOP;
|
|
284
|
|
285 } else {
|
|
286 goto invalid;
|
|
287 }
|
|
288 break;
|
|
289
|
|
290 case 5:
|
|
291 if ((c[0] == 'L'|| c[0] == 'l')
|
|
292 && (c[1] == 'O'|| c[1] == 'o')
|
|
293 && (c[2] == 'G'|| c[2] == 'g')
|
|
294 && (c[3] == 'I'|| c[3] == 'i')
|
|
295 && (c[4] == 'N'|| c[4] == 'n'))
|
|
296 {
|
|
297 s->command = NGX_IMAP_LOGIN;
|
|
298
|
|
299 } else {
|
|
300 goto invalid;
|
|
301 }
|
|
302 break;
|
|
303
|
|
304 case 6:
|
|
305 if ((c[0] == 'L'|| c[0] == 'l')
|
|
306 && (c[1] == 'O'|| c[1] == 'o')
|
|
307 && (c[2] == 'G'|| c[2] == 'g')
|
|
308 && (c[3] == 'O'|| c[3] == 'o')
|
|
309 && (c[4] == 'U'|| c[4] == 'u')
|
|
310 && (c[5] == 'T'|| c[5] == 't'))
|
|
311 {
|
|
312 s->command = NGX_IMAP_LOGOUT;
|
|
313
|
|
314 } else {
|
|
315 goto invalid;
|
|
316 }
|
|
317 break;
|
|
318
|
|
319 #if (NGX_MAIL_SSL)
|
|
320 case 8:
|
|
321 if ((c[0] == 'S'|| c[0] == 's')
|
|
322 && (c[1] == 'T'|| c[1] == 't')
|
|
323 && (c[2] == 'A'|| c[2] == 'a')
|
|
324 && (c[3] == 'R'|| c[3] == 'r')
|
|
325 && (c[4] == 'T'|| c[4] == 't')
|
|
326 && (c[5] == 'T'|| c[5] == 't')
|
|
327 && (c[6] == 'L'|| c[6] == 'l')
|
|
328 && (c[7] == 'S'|| c[7] == 's'))
|
|
329 {
|
|
330 s->command = NGX_IMAP_STARTTLS;
|
|
331
|
|
332 } else {
|
|
333 goto invalid;
|
|
334 }
|
|
335 break;
|
|
336 #endif
|
|
337
|
|
338 case 10:
|
|
339 if ((c[0] == 'C'|| c[0] == 'c')
|
|
340 && (c[1] == 'A'|| c[1] == 'a')
|
|
341 && (c[2] == 'P'|| c[2] == 'p')
|
|
342 && (c[3] == 'A'|| c[3] == 'a')
|
|
343 && (c[4] == 'B'|| c[4] == 'b')
|
|
344 && (c[5] == 'I'|| c[5] == 'i')
|
|
345 && (c[6] == 'L'|| c[6] == 'l')
|
|
346 && (c[7] == 'I'|| c[7] == 'i')
|
|
347 && (c[8] == 'T'|| c[8] == 't')
|
|
348 && (c[9] == 'Y'|| c[9] == 'y'))
|
|
349 {
|
|
350 s->command = NGX_IMAP_CAPABILITY;
|
|
351
|
|
352 } else {
|
|
353 goto invalid;
|
|
354 }
|
|
355 break;
|
|
356
|
322
|
357 case 12:
|
|
358 if ((c[0] == 'A'|| c[0] == 'a')
|
|
359 && (c[1] == 'U'|| c[1] == 'u')
|
|
360 && (c[2] == 'T'|| c[2] == 't')
|
|
361 && (c[3] == 'H'|| c[3] == 'h')
|
|
362 && (c[4] == 'E'|| c[4] == 'e')
|
|
363 && (c[5] == 'N'|| c[5] == 'n')
|
|
364 && (c[6] == 'T'|| c[6] == 't')
|
|
365 && (c[7] == 'I'|| c[7] == 'i')
|
|
366 && (c[8] == 'C'|| c[8] == 'c')
|
|
367 && (c[9] == 'A'|| c[9] == 'a')
|
|
368 && (c[10] == 'T'|| c[10] == 't')
|
|
369 && (c[11] == 'E'|| c[11] == 'e'))
|
|
370 {
|
|
371 s->command = NGX_IMAP_AUTHENTICATE;
|
|
372
|
|
373 } else {
|
|
374 goto invalid;
|
|
375 }
|
|
376 break;
|
|
377
|
290
|
378 default:
|
|
379 goto invalid;
|
|
380 }
|
|
381
|
|
382 switch (ch) {
|
|
383 case ' ':
|
|
384 state = sw_spaces_before_argument;
|
|
385 break;
|
|
386 case CR:
|
|
387 state = sw_almost_done;
|
|
388 break;
|
|
389 case LF:
|
|
390 goto done;
|
|
391 }
|
|
392 break;
|
|
393 }
|
|
394
|
|
395 if ((ch < 'A' || ch > 'Z') && (ch < 'a' || ch > 'z')) {
|
|
396 goto invalid;
|
|
397 }
|
|
398
|
|
399 break;
|
|
400
|
|
401 case sw_spaces_before_argument:
|
|
402 switch (ch) {
|
|
403 case ' ':
|
|
404 break;
|
|
405 case CR:
|
|
406 state = sw_almost_done;
|
|
407 s->arg_end = p;
|
|
408 break;
|
|
409 case LF:
|
|
410 s->arg_end = p;
|
|
411 goto done;
|
|
412 case '"':
|
|
413 if (s->args.nelts <= 2) {
|
|
414 s->quoted = 1;
|
|
415 s->arg_start = p + 1;
|
|
416 state = sw_argument;
|
|
417 break;
|
|
418 }
|
|
419 goto invalid;
|
|
420 case '{':
|
|
421 if (s->args.nelts <= 2) {
|
|
422 state = sw_literal;
|
|
423 break;
|
|
424 }
|
|
425 goto invalid;
|
|
426 default:
|
|
427 if (s->args.nelts <= 2) {
|
|
428 s->arg_start = p;
|
|
429 state = sw_argument;
|
|
430 break;
|
|
431 }
|
|
432 goto invalid;
|
|
433 }
|
|
434 break;
|
|
435
|
|
436 case sw_argument:
|
|
437 switch (ch) {
|
|
438 case '"':
|
|
439 if (!s->quoted) {
|
|
440 break;
|
|
441 }
|
|
442 s->quoted = 0;
|
|
443 /* fall through */
|
|
444 case ' ':
|
|
445 case CR:
|
|
446 case LF:
|
|
447 arg = ngx_array_push(&s->args);
|
|
448 if (arg == NULL) {
|
|
449 return NGX_ERROR;
|
|
450 }
|
|
451 arg->len = p - s->arg_start;
|
|
452 arg->data = s->arg_start;
|
|
453 s->arg_start = NULL;
|
|
454
|
|
455 switch (ch) {
|
|
456 case '"':
|
|
457 case ' ':
|
|
458 state = sw_spaces_before_argument;
|
|
459 break;
|
|
460 case CR:
|
|
461 state = sw_almost_done;
|
|
462 break;
|
|
463 case LF:
|
|
464 goto done;
|
|
465 }
|
|
466 break;
|
|
467 case '\\':
|
|
468 if (s->quoted) {
|
|
469 s->backslash = 1;
|
|
470 state = sw_backslash;
|
|
471 }
|
|
472 break;
|
|
473 }
|
|
474 break;
|
|
475
|
|
476 case sw_backslash:
|
|
477 switch (ch) {
|
|
478 case CR:
|
|
479 case LF:
|
|
480 goto invalid;
|
|
481 default:
|
|
482 state = sw_argument;
|
|
483 }
|
|
484 break;
|
|
485
|
|
486 case sw_literal:
|
|
487 if (ch >= '0' && ch <= '9') {
|
|
488 s->literal_len = s->literal_len * 10 + (ch - '0');
|
|
489 break;
|
|
490 }
|
|
491 if (ch == '}') {
|
|
492 state = sw_start_literal_argument;
|
|
493 break;
|
|
494 }
|
|
495 if (ch == '+') {
|
|
496 state = sw_no_sync_literal_argument;
|
|
497 break;
|
|
498 }
|
|
499 goto invalid;
|
|
500
|
|
501 case sw_no_sync_literal_argument:
|
|
502 if (ch == '}') {
|
|
503 s->no_sync_literal = 1;
|
|
504 state = sw_start_literal_argument;
|
|
505 break;
|
|
506 }
|
|
507 goto invalid;
|
|
508
|
|
509 case sw_start_literal_argument:
|
|
510 switch (ch) {
|
|
511 case CR:
|
|
512 break;
|
|
513 case LF:
|
|
514 s->buffer->pos = p + 1;
|
|
515 s->arg_start = p + 1;
|
|
516 if (s->no_sync_literal == 0) {
|
|
517 s->state = sw_literal_argument;
|
|
518 return NGX_IMAP_NEXT;
|
|
519 }
|
|
520 state = sw_literal_argument;
|
|
521 s->no_sync_literal = 0;
|
|
522 break;
|
|
523 default:
|
|
524 goto invalid;
|
|
525 }
|
|
526 break;
|
|
527
|
|
528 case sw_literal_argument:
|
|
529 if (s->literal_len && --s->literal_len) {
|
|
530 break;
|
|
531 }
|
|
532
|
|
533 arg = ngx_array_push(&s->args);
|
|
534 if (arg == NULL) {
|
|
535 return NGX_ERROR;
|
|
536 }
|
|
537 arg->len = p + 1 - s->arg_start;
|
|
538 arg->data = s->arg_start;
|
|
539 s->arg_start = NULL;
|
|
540 state = sw_end_literal_argument;
|
|
541
|
|
542 break;
|
|
543
|
|
544 case sw_end_literal_argument:
|
|
545 switch (ch) {
|
|
546 case '{':
|
|
547 if (s->args.nelts <= 2) {
|
|
548 state = sw_literal;
|
|
549 break;
|
|
550 }
|
|
551 goto invalid;
|
|
552 case CR:
|
|
553 state = sw_almost_done;
|
|
554 break;
|
|
555 case LF:
|
|
556 goto done;
|
|
557 default:
|
|
558 state = sw_spaces_before_argument;
|
|
559 break;
|
|
560 }
|
|
561 break;
|
|
562
|
|
563 case sw_almost_done:
|
|
564 switch (ch) {
|
|
565 case LF:
|
|
566 goto done;
|
|
567 default:
|
|
568 goto invalid;
|
|
569 }
|
|
570 }
|
|
571 }
|
|
572
|
|
573 s->buffer->pos = p;
|
|
574 s->state = state;
|
|
575
|
|
576 return NGX_AGAIN;
|
|
577
|
|
578 done:
|
|
579
|
|
580 s->buffer->pos = p + 1;
|
|
581
|
|
582 if (s->arg_start) {
|
|
583 arg = ngx_array_push(&s->args);
|
|
584 if (arg == NULL) {
|
|
585 return NGX_ERROR;
|
|
586 }
|
|
587 arg->len = s->arg_end - s->arg_start;
|
|
588 arg->data = s->arg_start;
|
|
589
|
|
590 s->arg_start = NULL;
|
|
591 s->cmd_start = NULL;
|
|
592 s->quoted = 0;
|
|
593 s->no_sync_literal = 0;
|
|
594 s->literal_len = 0;
|
|
595 }
|
|
596
|
322
|
597 s->state = (s->command != NGX_IMAP_AUTHENTICATE) ? sw_start : sw_argument;
|
290
|
598
|
|
599 return NGX_OK;
|
|
600
|
|
601 invalid:
|
|
602
|
|
603 s->state = sw_start;
|
|
604 s->quoted = 0;
|
|
605 s->no_sync_literal = 0;
|
|
606 s->literal_len = 0;
|
|
607
|
|
608 return NGX_MAIL_PARSE_INVALID_COMMAND;
|
|
609 }
|
|
610
|
|
611
|
|
612 ngx_int_t ngx_smtp_parse_command(ngx_mail_session_t *s)
|
|
613 {
|
|
614 u_char ch, *p, *c, c0, c1, c2, c3;
|
|
615 ngx_str_t *arg;
|
|
616 enum {
|
|
617 sw_start = 0,
|
|
618 sw_spaces_before_argument,
|
|
619 sw_argument,
|
|
620 sw_almost_done
|
|
621 } state;
|
|
622
|
|
623 state = s->state;
|
|
624
|
|
625 for (p = s->buffer->pos; p < s->buffer->last; p++) {
|
|
626 ch = *p;
|
|
627
|
|
628 switch (state) {
|
|
629
|
|
630 /* SMTP command */
|
|
631 case sw_start:
|
|
632 if (ch == ' ' || ch == CR || ch == LF) {
|
|
633 c = s->buffer->start;
|
|
634
|
|
635 if (p - c == 4) {
|
|
636
|
|
637 c0 = ngx_toupper(c[0]);
|
|
638 c1 = ngx_toupper(c[1]);
|
|
639 c2 = ngx_toupper(c[2]);
|
|
640 c3 = ngx_toupper(c[3]);
|
|
641
|
|
642 if (c0 == 'H' && c1 == 'E' && c2 == 'L' && c3 == 'O')
|
|
643 {
|
|
644 s->command = NGX_SMTP_HELO;
|
|
645
|
|
646 } else if (c0 == 'E' && c1 == 'H' && c2 == 'L' && c3 == 'O')
|
|
647 {
|
|
648 s->command = NGX_SMTP_EHLO;
|
|
649
|
|
650 } else if (c0 == 'Q' && c1 == 'U' && c2 == 'I' && c3 == 'T')
|
|
651 {
|
|
652 s->command = NGX_SMTP_QUIT;
|
|
653
|
|
654 } else if (c0 == 'A' && c1 == 'U' && c2 == 'T' && c3 == 'H')
|
|
655 {
|
|
656 s->command = NGX_SMTP_AUTH;
|
|
657
|
|
658 } else if (c0 == 'N' && c1 == 'O' && c2 == 'O' && c3 == 'P')
|
|
659 {
|
|
660 s->command = NGX_SMTP_NOOP;
|
|
661
|
|
662 } else if (c0 == 'M' && c1 == 'A' && c2 == 'I' && c3 == 'L')
|
|
663 {
|
|
664 s->command = NGX_SMTP_MAIL;
|
|
665
|
|
666 } else if (c0 == 'R' && c1 == 'S' && c2 == 'E' && c3 == 'T')
|
|
667 {
|
|
668 s->command = NGX_SMTP_RSET;
|
|
669
|
322
|
670 } else if (c0 == 'R' && c1 == 'C' && c2 == 'P' && c3 == 'T')
|
|
671 {
|
|
672 s->command = NGX_SMTP_RCPT;
|
|
673
|
|
674 } else if (c0 == 'V' && c1 == 'R' && c2 == 'F' && c3 == 'Y')
|
|
675 {
|
|
676 s->command = NGX_SMTP_VRFY;
|
|
677
|
|
678 } else if (c0 == 'E' && c1 == 'X' && c2 == 'P' && c3 == 'N')
|
|
679 {
|
|
680 s->command = NGX_SMTP_EXPN;
|
|
681
|
|
682 } else if (c0 == 'H' && c1 == 'E' && c2 == 'L' && c3 == 'P')
|
|
683 {
|
|
684 s->command = NGX_SMTP_HELP;
|
|
685
|
290
|
686 } else {
|
|
687 goto invalid;
|
|
688 }
|
322
|
689 #if (NGX_MAIL_SSL)
|
|
690 } else if (p - c == 8) {
|
290
|
691
|
322
|
692 if ((c[0] == 'S'|| c[0] == 's')
|
|
693 && (c[1] == 'T'|| c[1] == 't')
|
|
694 && (c[2] == 'A'|| c[2] == 'a')
|
|
695 && (c[3] == 'R'|| c[3] == 'r')
|
|
696 && (c[4] == 'T'|| c[4] == 't')
|
|
697 && (c[5] == 'T'|| c[5] == 't')
|
|
698 && (c[6] == 'L'|| c[6] == 'l')
|
|
699 && (c[7] == 'S'|| c[7] == 's'))
|
|
700 {
|
|
701 s->command = NGX_SMTP_STARTTLS;
|
|
702
|
|
703 } else {
|
|
704 goto invalid;
|
|
705 }
|
|
706 #endif
|
290
|
707 } else {
|
|
708 goto invalid;
|
|
709 }
|
|
710
|
|
711 switch (ch) {
|
|
712 case ' ':
|
|
713 state = sw_spaces_before_argument;
|
|
714 break;
|
|
715 case CR:
|
|
716 state = sw_almost_done;
|
|
717 break;
|
|
718 case LF:
|
|
719 goto done;
|
|
720 }
|
|
721 break;
|
|
722 }
|
|
723
|
|
724 if ((ch < 'A' || ch > 'Z') && (ch < 'a' || ch > 'z')) {
|
|
725 goto invalid;
|
|
726 }
|
|
727
|
|
728 break;
|
|
729
|
|
730 case sw_spaces_before_argument:
|
|
731 switch (ch) {
|
|
732 case ' ':
|
|
733 break;
|
|
734 case CR:
|
|
735 state = sw_almost_done;
|
|
736 s->arg_end = p;
|
|
737 break;
|
|
738 case LF:
|
|
739 s->arg_end = p;
|
|
740 goto done;
|
|
741 default:
|
|
742 if (s->args.nelts <= 2) {
|
|
743 state = sw_argument;
|
|
744 s->arg_start = p;
|
|
745 break;
|
|
746 }
|
|
747 goto invalid;
|
|
748 }
|
|
749 break;
|
|
750
|
|
751 case sw_argument:
|
|
752 switch (ch) {
|
|
753 case ' ':
|
|
754 case CR:
|
|
755 case LF:
|
|
756 arg = ngx_array_push(&s->args);
|
|
757 if (arg == NULL) {
|
|
758 return NGX_ERROR;
|
|
759 }
|
|
760 arg->len = p - s->arg_start;
|
|
761 arg->data = s->arg_start;
|
|
762 s->arg_start = NULL;
|
|
763
|
|
764 switch (ch) {
|
|
765 case ' ':
|
|
766 state = sw_spaces_before_argument;
|
|
767 break;
|
|
768 case CR:
|
|
769 state = sw_almost_done;
|
|
770 break;
|
|
771 case LF:
|
|
772 goto done;
|
|
773 }
|
|
774 break;
|
|
775
|
|
776 default:
|
|
777 break;
|
|
778 }
|
|
779 break;
|
|
780
|
|
781 case sw_almost_done:
|
|
782 switch (ch) {
|
|
783 case LF:
|
|
784 goto done;
|
|
785 default:
|
|
786 goto invalid;
|
|
787 }
|
|
788 }
|
|
789 }
|
|
790
|
|
791 s->buffer->pos = p;
|
|
792 s->state = state;
|
|
793
|
|
794 return NGX_AGAIN;
|
|
795
|
|
796 done:
|
|
797
|
|
798 s->buffer->pos = p + 1;
|
|
799
|
|
800 if (s->arg_start) {
|
|
801 arg = ngx_array_push(&s->args);
|
|
802 if (arg == NULL) {
|
|
803 return NGX_ERROR;
|
|
804 }
|
|
805 arg->len = s->arg_end - s->arg_start;
|
|
806 arg->data = s->arg_start;
|
|
807 s->arg_start = NULL;
|
|
808 }
|
|
809
|
|
810 s->state = (s->command != NGX_SMTP_AUTH) ? sw_start : sw_argument;
|
|
811
|
|
812 return NGX_OK;
|
|
813
|
|
814 invalid:
|
|
815
|
|
816 s->state = sw_start;
|
|
817 s->arg_start = NULL;
|
|
818
|
|
819 return NGX_MAIL_PARSE_INVALID_COMMAND;
|
|
820 }
|