Mercurial > hg > nginx-vendor-1-0
comparison src/imap/ngx_imap_parse.c @ 76:da9a3b14312d NGINX_0_1_38
nginx 0.1.38
*) Feature: the "limit_rate" directive is supported in in proxy and
FastCGI mode.
*) Feature: the "X-Accel-Limit-Rate" response header line is supported
in proxy and FastCGI mode.
*) Feature: the "break" directive.
*) Feature: the "log_not_found" directive.
*) Bugfix: the response status code was not changed when request was
redirected by the ""X-Accel-Redirect" header line.
*) Bugfix: the variables set by the "set" directive could not be used
in SSI.
*) Bugfix: the segmentation fault may occurred if the SSI page has more
than one remote subrequest.
*) Bugfix: nginx treated the backend response as invalid if the status
line in the header was transferred in two packets; bug appeared in
0.1.29.
*) Feature: the "ssi_types" directive.
*) Feature: the "autoindex_exact_size" directive.
*) Bugfix: the ngx_http_autoindex_module did not support the long file
names in UTF-8.
*) Feature: the IMAP/POP3 proxy.
author | Igor Sysoev <http://sysoev.ru> |
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date | Fri, 08 Jul 2005 00:00:00 +0400 |
parents | |
children | 9db7e0b5b27f |
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75:985847bb65f9 | 76:da9a3b14312d |
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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_imap.h> | |
11 | |
12 | |
13 ngx_int_t ngx_imap_parse_command(ngx_imap_session_t *s) | |
14 { | |
15 u_char ch, *p, *c; | |
16 ngx_str_t *arg; | |
17 enum { | |
18 sw_start = 0, | |
19 sw_spaces_before_command, | |
20 sw_command, | |
21 sw_spaces_before_argument, | |
22 sw_argument, | |
23 sw_literal, | |
24 sw_start_literal_argument, | |
25 sw_literal_argument, | |
26 sw_end_literal_argument, | |
27 sw_almost_done | |
28 } state; | |
29 | |
30 state = s->state; | |
31 | |
32 for (p = s->buffer->pos; p < s->buffer->last; p++) { | |
33 ch = *p; | |
34 | |
35 switch (state) { | |
36 | |
37 /* IMAP tag */ | |
38 case sw_start: | |
39 switch (ch) { | |
40 case ' ': | |
41 s->tag.len = p - s->buffer->start + 1; | |
42 s->tag.data = s->buffer->start; | |
43 state = sw_spaces_before_command; | |
44 break; | |
45 case CR: | |
46 s->state = sw_start; | |
47 return NGX_IMAP_PARSE_INVALID_COMMAND; | |
48 case LF: | |
49 s->state = sw_start; | |
50 return NGX_IMAP_PARSE_INVALID_COMMAND; | |
51 } | |
52 break; | |
53 | |
54 case sw_spaces_before_command: | |
55 switch (ch) { | |
56 case ' ': | |
57 break; | |
58 case CR: | |
59 s->state = sw_start; | |
60 return NGX_IMAP_PARSE_INVALID_COMMAND; | |
61 case LF: | |
62 s->state = sw_start; | |
63 return NGX_IMAP_PARSE_INVALID_COMMAND; | |
64 default: | |
65 s->cmd_start = p; | |
66 state = sw_command; | |
67 break; | |
68 } | |
69 break; | |
70 | |
71 case sw_command: | |
72 if (ch == ' ' || ch == CR || ch == LF) { | |
73 | |
74 c = s->cmd_start; | |
75 | |
76 switch (p - c) { | |
77 | |
78 case 4: | |
79 if ((c[0] == 'N' || c[0] == 'n') | |
80 && (c[1] == 'O'|| c[1] == 'o') | |
81 && (c[2] == 'O'|| c[2] == 'o') | |
82 && (c[3] == 'P'|| c[3] == 'p')) | |
83 { | |
84 s->command = NGX_IMAP_NOOP; | |
85 | |
86 } else { | |
87 goto invalid; | |
88 } | |
89 break; | |
90 | |
91 case 5: | |
92 if ((c[0] == 'L'|| c[0] == 'l') | |
93 && (c[1] == 'O'|| c[1] == 'o') | |
94 && (c[2] == 'G'|| c[2] == 'g') | |
95 && (c[3] == 'I'|| c[3] == 'i') | |
96 && (c[4] == 'N'|| c[4] == 'n')) | |
97 { | |
98 s->command = NGX_IMAP_LOGIN; | |
99 | |
100 } else { | |
101 goto invalid; | |
102 } | |
103 break; | |
104 | |
105 case 6: | |
106 if ((c[0] == 'L'|| c[0] == 'l') | |
107 && (c[1] == 'O'|| c[1] == 'o') | |
108 && (c[2] == 'G'|| c[2] == 'g') | |
109 && (c[3] == 'O'|| c[3] == 'o') | |
110 && (c[4] == 'U'|| c[4] == 'u') | |
111 && (c[5] == 'T'|| c[5] == 't')) | |
112 { | |
113 s->command = NGX_IMAP_LOGOUT; | |
114 | |
115 } else { | |
116 goto invalid; | |
117 } | |
118 break; | |
119 | |
120 case 10: | |
121 if ((c[0] == 'C'|| c[0] == 'c') | |
122 && (c[1] == 'A'|| c[1] == 'a') | |
123 && (c[2] == 'P'|| c[2] == 'p') | |
124 && (c[3] == 'A'|| c[3] == 'a') | |
125 && (c[4] == 'B'|| c[4] == 'b') | |
126 && (c[5] == 'I'|| c[5] == 'i') | |
127 && (c[6] == 'L'|| c[6] == 'l') | |
128 && (c[7] == 'I'|| c[7] == 'i') | |
129 && (c[8] == 'T'|| c[8] == 't') | |
130 && (c[9] == 'Y'|| c[9] == 'y')) | |
131 { | |
132 s->command = NGX_IMAP_CAPABILITY; | |
133 | |
134 } else { | |
135 goto invalid; | |
136 } | |
137 break; | |
138 | |
139 default: | |
140 goto invalid; | |
141 } | |
142 | |
143 switch (ch) { | |
144 case ' ': | |
145 state = sw_spaces_before_argument; | |
146 break; | |
147 case CR: | |
148 state = sw_almost_done; | |
149 break; | |
150 case LF: | |
151 goto done; | |
152 } | |
153 break; | |
154 } | |
155 | |
156 if ((ch < 'A' || ch > 'Z') && (ch < 'a' || ch > 'z')) { | |
157 goto invalid; | |
158 } | |
159 | |
160 break; | |
161 | |
162 case sw_spaces_before_argument: | |
163 switch (ch) { | |
164 case ' ': | |
165 break; | |
166 case CR: | |
167 state = sw_almost_done; | |
168 s->arg_end = p; | |
169 break; | |
170 case LF: | |
171 s->arg_end = p; | |
172 goto done; | |
173 case '"': | |
174 if (s->args.nelts <= 2) { | |
175 s->quoted = 1; | |
176 s->arg_start = p + 1; | |
177 state = sw_argument; | |
178 break; | |
179 } | |
180 goto invalid; | |
181 case '{': | |
182 if (s->args.nelts <= 2) { | |
183 state = sw_literal; | |
184 break; | |
185 } | |
186 goto invalid; | |
187 default: | |
188 if (s->args.nelts <= 2) { | |
189 s->arg_start = p; | |
190 state = sw_argument; | |
191 break; | |
192 } | |
193 goto invalid; | |
194 } | |
195 break; | |
196 | |
197 case sw_argument: | |
198 switch (ch) { | |
199 case '"': | |
200 if (!s->quoted) { | |
201 break; | |
202 } | |
203 s->quoted = 0; | |
204 /* fall through */ | |
205 case ' ': | |
206 case CR: | |
207 case LF: | |
208 arg = ngx_array_push(&s->args); | |
209 if (arg == NULL) { | |
210 return NGX_ERROR; | |
211 } | |
212 arg->len = p - s->arg_start; | |
213 arg->data = s->arg_start; | |
214 s->arg_start = NULL; | |
215 | |
216 switch (ch) { | |
217 case '"': | |
218 case ' ': | |
219 state = sw_spaces_before_argument; | |
220 break; | |
221 case CR: | |
222 state = sw_almost_done; | |
223 break; | |
224 case LF: | |
225 goto done; | |
226 } | |
227 break; | |
228 } | |
229 break; | |
230 | |
231 case sw_literal: | |
232 if (ch >= '0' && ch <= '9') { | |
233 s->literal_len = s->literal_len * 10 + (ch - '0'); | |
234 break; | |
235 } | |
236 if (ch == '}') { | |
237 state = sw_start_literal_argument; | |
238 break; | |
239 } | |
240 goto invalid; | |
241 | |
242 case sw_start_literal_argument: | |
243 switch (ch) { | |
244 case CR: | |
245 break; | |
246 case LF: | |
247 s->buffer->pos = p + 1; | |
248 s->arg_start = p + 1; | |
249 s->state = sw_literal_argument; | |
250 return NGX_IMAP_NEXT; | |
251 } | |
252 goto invalid; | |
253 | |
254 case sw_literal_argument: | |
255 if (--s->literal_len) { | |
256 break; | |
257 } | |
258 | |
259 arg = ngx_array_push(&s->args); | |
260 if (arg == NULL) { | |
261 return NGX_ERROR; | |
262 } | |
263 arg->len = p + 1 - s->arg_start; | |
264 arg->data = s->arg_start; | |
265 s->arg_start = NULL; | |
266 state = sw_end_literal_argument; | |
267 | |
268 break; | |
269 | |
270 case sw_end_literal_argument: | |
271 switch (ch) { | |
272 case '{': | |
273 if (s->args.nelts <= 2) { | |
274 state = sw_literal; | |
275 break; | |
276 } | |
277 goto invalid; | |
278 case CR: | |
279 state = sw_almost_done; | |
280 break; | |
281 case LF: | |
282 goto done; | |
283 default: | |
284 goto invalid; | |
285 } | |
286 break; | |
287 | |
288 case sw_almost_done: | |
289 switch (ch) { | |
290 case LF: | |
291 goto done; | |
292 default: | |
293 goto invalid; | |
294 } | |
295 } | |
296 } | |
297 | |
298 s->buffer->pos = p; | |
299 s->state = state; | |
300 | |
301 return NGX_AGAIN; | |
302 | |
303 done: | |
304 | |
305 s->buffer->pos = p + 1; | |
306 | |
307 if (s->arg_start) { | |
308 arg = ngx_array_push(&s->args); | |
309 if (arg == NULL) { | |
310 return NGX_ERROR; | |
311 } | |
312 arg->len = s->arg_end - s->arg_start; | |
313 arg->data = s->arg_start; | |
314 s->arg_start = NULL; | |
315 s->cmd_start = NULL; | |
316 s->quoted = 0; | |
317 s->literal_len = 0; | |
318 } | |
319 | |
320 s->state = sw_start; | |
321 | |
322 return NGX_OK; | |
323 | |
324 invalid: | |
325 | |
326 s->state = sw_start; | |
327 s->quoted = 0; | |
328 s->literal_len = 0; | |
329 | |
330 return NGX_IMAP_PARSE_INVALID_COMMAND; | |
331 } | |
332 | |
333 | |
334 ngx_int_t ngx_pop3_parse_command(ngx_imap_session_t *s) | |
335 { | |
336 u_char ch, *p, *c, c0, c1, c2, c3; | |
337 ngx_str_t *arg; | |
338 enum { | |
339 sw_start = 0, | |
340 sw_spaces_before_argument, | |
341 sw_argument, | |
342 sw_almost_done | |
343 } state; | |
344 | |
345 state = s->state; | |
346 | |
347 for (p = s->buffer->pos; p < s->buffer->last; p++) { | |
348 ch = *p; | |
349 | |
350 switch (state) { | |
351 | |
352 /* POP3 command */ | |
353 case sw_start: | |
354 if (ch == ' ' || ch == CR || ch == LF) { | |
355 c = s->buffer->start; | |
356 | |
357 if (p - c == 4) { | |
358 | |
359 c0 = ngx_toupper(c[0]); | |
360 c1 = ngx_toupper(c[1]); | |
361 c2 = ngx_toupper(c[2]); | |
362 c3 = ngx_toupper(c[3]); | |
363 | |
364 if (c0 == 'U' && c1 == 'S' && c2 == 'E' && c3 == 'R') | |
365 { | |
366 s->command = NGX_POP3_USER; | |
367 | |
368 } else if (c0 == 'P' && c1 == 'A' && c2 == 'S' && c3 == 'S') | |
369 { | |
370 s->command = NGX_POP3_PASS; | |
371 | |
372 } else if (c0 == 'Q' && c1 == 'U' && c2 == 'I' && c3 == 'T') | |
373 { | |
374 s->command = NGX_POP3_QUIT; | |
375 | |
376 } else if (c0 == 'C' && c1 == 'A' && c2 == 'P' && c3 == 'A') | |
377 { | |
378 s->command = NGX_POP3_CAPA; | |
379 | |
380 } else if (c0 == 'N' && c1 == 'O' && c2 == 'O' && c3 == 'P') | |
381 { | |
382 s->command = NGX_POP3_NOOP; | |
383 | |
384 } else { | |
385 goto invalid; | |
386 } | |
387 | |
388 } else { | |
389 goto invalid; | |
390 } | |
391 | |
392 switch (ch) { | |
393 case ' ': | |
394 state = sw_spaces_before_argument; | |
395 break; | |
396 case CR: | |
397 state = sw_almost_done; | |
398 break; | |
399 case LF: | |
400 goto done; | |
401 } | |
402 break; | |
403 } | |
404 | |
405 if ((ch < 'A' || ch > 'Z') && (ch < 'a' || ch > 'z')) { | |
406 goto invalid; | |
407 } | |
408 | |
409 break; | |
410 | |
411 case sw_spaces_before_argument: | |
412 switch (ch) { | |
413 case ' ': | |
414 break; | |
415 case CR: | |
416 state = sw_almost_done; | |
417 s->arg_end = p; | |
418 break; | |
419 case LF: | |
420 s->arg_end = p; | |
421 goto done; | |
422 default: | |
423 if (s->args.nelts <= 2) { | |
424 state = sw_argument; | |
425 s->arg_start = p; | |
426 break; | |
427 } | |
428 goto invalid; | |
429 } | |
430 break; | |
431 | |
432 case sw_argument: | |
433 switch (ch) { | |
434 case ' ': | |
435 case CR: | |
436 case LF: | |
437 arg = ngx_array_push(&s->args); | |
438 if (arg == NULL) { | |
439 return NGX_ERROR; | |
440 } | |
441 arg->len = p - s->arg_start; | |
442 arg->data = s->arg_start; | |
443 s->arg_start = NULL; | |
444 | |
445 switch (ch) { | |
446 case ' ': | |
447 state = sw_spaces_before_argument; | |
448 break; | |
449 case CR: | |
450 state = sw_almost_done; | |
451 break; | |
452 case LF: | |
453 goto done; | |
454 } | |
455 break; | |
456 | |
457 default: | |
458 break; | |
459 } | |
460 break; | |
461 | |
462 case sw_almost_done: | |
463 switch (ch) { | |
464 case LF: | |
465 goto done; | |
466 default: | |
467 goto invalid; | |
468 } | |
469 } | |
470 } | |
471 | |
472 s->buffer->pos = p; | |
473 s->state = state; | |
474 | |
475 return NGX_AGAIN; | |
476 | |
477 done: | |
478 | |
479 s->buffer->pos = p + 1; | |
480 | |
481 if (s->arg_start) { | |
482 arg = ngx_array_push(&s->args); | |
483 if (arg == NULL) { | |
484 return NGX_ERROR; | |
485 } | |
486 arg->len = s->arg_end - s->arg_start; | |
487 arg->data = s->arg_start; | |
488 s->arg_start = NULL; | |
489 } | |
490 | |
491 s->state = sw_start; | |
492 | |
493 return NGX_OK; | |
494 | |
495 invalid: | |
496 | |
497 s->state = sw_start; | |
498 | |
499 return NGX_IMAP_PARSE_INVALID_COMMAND; | |
500 } |