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d02b48c6 | 1 | /* crypto/bio/bss_acpt.c */ |
58964a49 | 2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
d02b48c6 RE |
3 | * All rights reserved. |
4 | * | |
5 | * This package is an SSL implementation written | |
6 | * by Eric Young (eay@cryptsoft.com). | |
7 | * The implementation was written so as to conform with Netscapes SSL. | |
40720ce3 | 8 | * |
d02b48c6 RE |
9 | * This library is free for commercial and non-commercial use as long as |
10 | * the following conditions are aheared to. The following conditions | |
11 | * apply to all code found in this distribution, be it the RC4, RSA, | |
12 | * lhash, DES, etc., code; not just the SSL code. The SSL documentation | |
13 | * included with this distribution is covered by the same copyright terms | |
14 | * except that the holder is Tim Hudson (tjh@cryptsoft.com). | |
40720ce3 | 15 | * |
d02b48c6 RE |
16 | * Copyright remains Eric Young's, and as such any Copyright notices in |
17 | * the code are not to be removed. | |
18 | * If this package is used in a product, Eric Young should be given attribution | |
19 | * as the author of the parts of the library used. | |
20 | * This can be in the form of a textual message at program startup or | |
21 | * in documentation (online or textual) provided with the package. | |
40720ce3 | 22 | * |
d02b48c6 RE |
23 | * Redistribution and use in source and binary forms, with or without |
24 | * modification, are permitted provided that the following conditions | |
25 | * are met: | |
26 | * 1. Redistributions of source code must retain the copyright | |
27 | * notice, this list of conditions and the following disclaimer. | |
28 | * 2. Redistributions in binary form must reproduce the above copyright | |
29 | * notice, this list of conditions and the following disclaimer in the | |
30 | * documentation and/or other materials provided with the distribution. | |
31 | * 3. All advertising materials mentioning features or use of this software | |
32 | * must display the following acknowledgement: | |
33 | * "This product includes cryptographic software written by | |
34 | * Eric Young (eay@cryptsoft.com)" | |
35 | * The word 'cryptographic' can be left out if the rouines from the library | |
36 | * being used are not cryptographic related :-). | |
40720ce3 | 37 | * 4. If you include any Windows specific code (or a derivative thereof) from |
d02b48c6 RE |
38 | * the apps directory (application code) you must include an acknowledgement: |
39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
40720ce3 | 40 | * |
d02b48c6 RE |
41 | * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
42 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
43 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
44 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE | |
45 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
46 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
47 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
48 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
49 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
50 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
51 | * SUCH DAMAGE. | |
40720ce3 | 52 | * |
d02b48c6 RE |
53 | * The licence and distribution terms for any publically available version or |
54 | * derivative of this code cannot be changed. i.e. this code cannot simply be | |
55 | * copied and put under another distribution licence | |
56 | * [including the GNU Public Licence.] | |
57 | */ | |
58 | ||
d02b48c6 RE |
59 | #include <stdio.h> |
60 | #include <errno.h> | |
61 | #define USE_SOCKETS | |
62 | #include "cryptlib.h" | |
ec577822 | 63 | #include <openssl/bio.h> |
d02b48c6 | 64 | |
9ba4cc00 RL |
65 | #ifndef OPENSSL_NO_SOCK |
66 | ||
40720ce3 MC |
67 | # ifdef OPENSSL_SYS_WIN16 |
68 | # define SOCKET_PROTOCOL 0 /* more microsoft stupidity */ | |
69 | # else | |
70 | # define SOCKET_PROTOCOL IPPROTO_TCP | |
71 | # endif | |
d02b48c6 | 72 | |
40720ce3 | 73 | # if (defined(OPENSSL_SYS_VMS) && __VMS_VER < 70000000) |
75e0770d | 74 | /* FIONBIO used as a switch to enable ioctl, and that isn't in VMS < 7.0 */ |
40720ce3 MC |
75 | # undef FIONBIO |
76 | # endif | |
77 | ||
78 | typedef struct bio_accept_st { | |
79 | int state; | |
80 | char *param_addr; | |
81 | int accept_sock; | |
82 | int accept_nbio; | |
83 | char *addr; | |
84 | int nbio; | |
85 | /* | |
86 | * If 0, it means normal, if 1, do a connect on bind failure, and if | |
87 | * there is no-one listening, bind with SO_REUSEADDR. If 2, always use | |
88 | * SO_REUSEADDR. | |
89 | */ | |
90 | int bind_mode; | |
91 | BIO *bio_chain; | |
92 | } BIO_ACCEPT; | |
d02b48c6 | 93 | |
0e1c0612 UM |
94 | static int acpt_write(BIO *h, const char *buf, int num); |
95 | static int acpt_read(BIO *h, char *buf, int size); | |
96 | static int acpt_puts(BIO *h, const char *str); | |
97 | static long acpt_ctrl(BIO *h, int cmd, long arg1, void *arg2); | |
d02b48c6 RE |
98 | static int acpt_new(BIO *h); |
99 | static int acpt_free(BIO *data); | |
d02b48c6 RE |
100 | static int acpt_state(BIO *b, BIO_ACCEPT *c); |
101 | static void acpt_close_socket(BIO *data); | |
40720ce3 | 102 | BIO_ACCEPT *BIO_ACCEPT_new(void); |
d02b48c6 RE |
103 | void BIO_ACCEPT_free(BIO_ACCEPT *a); |
104 | ||
40720ce3 MC |
105 | # define ACPT_S_BEFORE 1 |
106 | # define ACPT_S_GET_ACCEPT_SOCKET 2 | |
107 | # define ACPT_S_OK 3 | |
108 | ||
109 | static BIO_METHOD methods_acceptp = { | |
110 | BIO_TYPE_ACCEPT, | |
111 | "socket accept", | |
112 | acpt_write, | |
113 | acpt_read, | |
114 | acpt_puts, | |
115 | NULL, /* connect_gets, */ | |
116 | acpt_ctrl, | |
117 | acpt_new, | |
118 | acpt_free, | |
119 | NULL, | |
120 | }; | |
d02b48c6 | 121 | |
6b691a5c | 122 | BIO_METHOD *BIO_s_accept(void) |
40720ce3 MC |
123 | { |
124 | return (&methods_acceptp); | |
125 | } | |
d02b48c6 | 126 | |
6b691a5c | 127 | static int acpt_new(BIO *bi) |
40720ce3 MC |
128 | { |
129 | BIO_ACCEPT *ba; | |
130 | ||
131 | bi->init = 0; | |
132 | bi->num = INVALID_SOCKET; | |
133 | bi->flags = 0; | |
134 | if ((ba = BIO_ACCEPT_new()) == NULL) | |
135 | return (0); | |
136 | bi->ptr = (char *)ba; | |
137 | ba->state = ACPT_S_BEFORE; | |
138 | bi->shutdown = 1; | |
139 | return (1); | |
140 | } | |
d02b48c6 | 141 | |
6b691a5c | 142 | BIO_ACCEPT *BIO_ACCEPT_new(void) |
40720ce3 MC |
143 | { |
144 | BIO_ACCEPT *ret; | |
d02b48c6 | 145 | |
40720ce3 MC |
146 | if ((ret = (BIO_ACCEPT *)OPENSSL_malloc(sizeof(BIO_ACCEPT))) == NULL) |
147 | return (NULL); | |
d02b48c6 | 148 | |
40720ce3 MC |
149 | memset(ret, 0, sizeof(BIO_ACCEPT)); |
150 | ret->accept_sock = INVALID_SOCKET; | |
151 | ret->bind_mode = BIO_BIND_NORMAL; | |
152 | return (ret); | |
153 | } | |
d02b48c6 | 154 | |
6b691a5c | 155 | void BIO_ACCEPT_free(BIO_ACCEPT *a) |
40720ce3 MC |
156 | { |
157 | if (a == NULL) | |
158 | return; | |
159 | ||
160 | if (a->param_addr != NULL) | |
161 | OPENSSL_free(a->param_addr); | |
162 | if (a->addr != NULL) | |
163 | OPENSSL_free(a->addr); | |
164 | if (a->bio_chain != NULL) | |
165 | BIO_free(a->bio_chain); | |
166 | OPENSSL_free(a); | |
167 | } | |
d02b48c6 | 168 | |
6b691a5c | 169 | static void acpt_close_socket(BIO *bio) |
40720ce3 MC |
170 | { |
171 | BIO_ACCEPT *c; | |
172 | ||
173 | c = (BIO_ACCEPT *)bio->ptr; | |
174 | if (c->accept_sock != INVALID_SOCKET) { | |
175 | shutdown(c->accept_sock, 2); | |
176 | closesocket(c->accept_sock); | |
177 | c->accept_sock = INVALID_SOCKET; | |
178 | bio->num = INVALID_SOCKET; | |
179 | } | |
180 | } | |
d02b48c6 | 181 | |
6b691a5c | 182 | static int acpt_free(BIO *a) |
40720ce3 MC |
183 | { |
184 | BIO_ACCEPT *data; | |
185 | ||
186 | if (a == NULL) | |
187 | return (0); | |
188 | data = (BIO_ACCEPT *)a->ptr; | |
189 | ||
190 | if (a->shutdown) { | |
191 | acpt_close_socket(a); | |
192 | BIO_ACCEPT_free(data); | |
193 | a->ptr = NULL; | |
194 | a->flags = 0; | |
195 | a->init = 0; | |
196 | } | |
197 | return (1); | |
198 | } | |
199 | ||
6b691a5c | 200 | static int acpt_state(BIO *b, BIO_ACCEPT *c) |
40720ce3 MC |
201 | { |
202 | BIO *bio = NULL, *dbio; | |
203 | int s = -1; | |
204 | int i; | |
205 | ||
206 | again: | |
207 | switch (c->state) { | |
208 | case ACPT_S_BEFORE: | |
209 | if (c->param_addr == NULL) { | |
210 | BIOerr(BIO_F_ACPT_STATE, BIO_R_NO_ACCEPT_PORT_SPECIFIED); | |
211 | return (-1); | |
212 | } | |
213 | s = BIO_get_accept_socket(c->param_addr, c->bind_mode); | |
214 | if (s == INVALID_SOCKET) | |
215 | return (-1); | |
216 | ||
217 | if (c->accept_nbio) { | |
218 | if (!BIO_socket_nbio(s, 1)) { | |
219 | closesocket(s); | |
220 | BIOerr(BIO_F_ACPT_STATE, | |
221 | BIO_R_ERROR_SETTING_NBIO_ON_ACCEPT_SOCKET); | |
222 | return (-1); | |
223 | } | |
224 | } | |
225 | c->accept_sock = s; | |
226 | b->num = s; | |
227 | c->state = ACPT_S_GET_ACCEPT_SOCKET; | |
228 | return (1); | |
229 | /* break; */ | |
230 | case ACPT_S_GET_ACCEPT_SOCKET: | |
231 | if (b->next_bio != NULL) { | |
232 | c->state = ACPT_S_OK; | |
233 | goto again; | |
234 | } | |
235 | BIO_clear_retry_flags(b); | |
236 | b->retry_reason = 0; | |
237 | i = BIO_accept(c->accept_sock, &(c->addr)); | |
238 | ||
239 | /* -2 return means we should retry */ | |
240 | if (i == -2) { | |
241 | BIO_set_retry_special(b); | |
242 | b->retry_reason = BIO_RR_ACCEPT; | |
243 | return -1; | |
244 | } | |
245 | ||
246 | if (i < 0) | |
247 | return (i); | |
248 | ||
249 | bio = BIO_new_socket(i, BIO_CLOSE); | |
250 | if (bio == NULL) | |
251 | goto err; | |
252 | ||
253 | BIO_set_callback(bio, BIO_get_callback(b)); | |
254 | BIO_set_callback_arg(bio, BIO_get_callback_arg(b)); | |
255 | ||
256 | if (c->nbio) { | |
257 | if (!BIO_socket_nbio(i, 1)) { | |
258 | BIOerr(BIO_F_ACPT_STATE, | |
259 | BIO_R_ERROR_SETTING_NBIO_ON_ACCEPTED_SOCKET); | |
260 | goto err; | |
261 | } | |
262 | } | |
263 | ||
264 | /* | |
265 | * If the accept BIO has an bio_chain, we dup it and put the new | |
266 | * socket at the end. | |
267 | */ | |
268 | if (c->bio_chain != NULL) { | |
269 | if ((dbio = BIO_dup_chain(c->bio_chain)) == NULL) | |
270 | goto err; | |
271 | if (!BIO_push(dbio, bio)) | |
272 | goto err; | |
273 | bio = dbio; | |
274 | } | |
275 | if (BIO_push(b, bio) == NULL) | |
276 | goto err; | |
277 | ||
278 | c->state = ACPT_S_OK; | |
279 | return (1); | |
280 | err: | |
281 | if (bio != NULL) | |
282 | BIO_free(bio); | |
283 | else if (s >= 0) | |
284 | closesocket(s); | |
285 | return (0); | |
286 | /* break; */ | |
287 | case ACPT_S_OK: | |
288 | if (b->next_bio == NULL) { | |
289 | c->state = ACPT_S_GET_ACCEPT_SOCKET; | |
290 | goto again; | |
291 | } | |
292 | return (1); | |
293 | /* break; */ | |
294 | default: | |
295 | return (0); | |
296 | /* break; */ | |
297 | } | |
298 | ||
299 | } | |
d02b48c6 | 300 | |
6b691a5c | 301 | static int acpt_read(BIO *b, char *out, int outl) |
40720ce3 MC |
302 | { |
303 | int ret = 0; | |
304 | BIO_ACCEPT *data; | |
d02b48c6 | 305 | |
40720ce3 MC |
306 | BIO_clear_retry_flags(b); |
307 | data = (BIO_ACCEPT *)b->ptr; | |
d02b48c6 | 308 | |
40720ce3 MC |
309 | while (b->next_bio == NULL) { |
310 | ret = acpt_state(b, data); | |
311 | if (ret <= 0) | |
312 | return (ret); | |
313 | } | |
d02b48c6 | 314 | |
40720ce3 MC |
315 | ret = BIO_read(b->next_bio, out, outl); |
316 | BIO_copy_next_retry(b); | |
317 | return (ret); | |
318 | } | |
d02b48c6 | 319 | |
0e1c0612 | 320 | static int acpt_write(BIO *b, const char *in, int inl) |
40720ce3 MC |
321 | { |
322 | int ret; | |
323 | BIO_ACCEPT *data; | |
d02b48c6 | 324 | |
40720ce3 MC |
325 | BIO_clear_retry_flags(b); |
326 | data = (BIO_ACCEPT *)b->ptr; | |
d02b48c6 | 327 | |
40720ce3 MC |
328 | while (b->next_bio == NULL) { |
329 | ret = acpt_state(b, data); | |
330 | if (ret <= 0) | |
331 | return (ret); | |
332 | } | |
d02b48c6 | 333 | |
40720ce3 MC |
334 | ret = BIO_write(b->next_bio, in, inl); |
335 | BIO_copy_next_retry(b); | |
336 | return (ret); | |
337 | } | |
d02b48c6 | 338 | |
0e1c0612 | 339 | static long acpt_ctrl(BIO *b, int cmd, long num, void *ptr) |
40720ce3 MC |
340 | { |
341 | int *ip; | |
342 | long ret = 1; | |
343 | BIO_ACCEPT *data; | |
344 | char **pp; | |
345 | ||
346 | data = (BIO_ACCEPT *)b->ptr; | |
347 | ||
348 | switch (cmd) { | |
349 | case BIO_CTRL_RESET: | |
350 | ret = 0; | |
351 | data->state = ACPT_S_BEFORE; | |
352 | acpt_close_socket(b); | |
353 | b->flags = 0; | |
354 | break; | |
355 | case BIO_C_DO_STATE_MACHINE: | |
356 | /* use this one to start the connection */ | |
357 | ret = (long)acpt_state(b, data); | |
358 | break; | |
359 | case BIO_C_SET_ACCEPT: | |
360 | if (ptr != NULL) { | |
361 | if (num == 0) { | |
362 | b->init = 1; | |
363 | if (data->param_addr != NULL) | |
364 | OPENSSL_free(data->param_addr); | |
365 | data->param_addr = BUF_strdup(ptr); | |
366 | } else if (num == 1) { | |
367 | data->accept_nbio = (ptr != NULL); | |
368 | } else if (num == 2) { | |
369 | if (data->bio_chain != NULL) | |
370 | BIO_free(data->bio_chain); | |
371 | data->bio_chain = (BIO *)ptr; | |
372 | } | |
373 | } | |
374 | break; | |
375 | case BIO_C_SET_NBIO: | |
376 | data->nbio = (int)num; | |
377 | break; | |
378 | case BIO_C_SET_FD: | |
379 | b->init = 1; | |
380 | b->num = *((int *)ptr); | |
381 | data->accept_sock = b->num; | |
382 | data->state = ACPT_S_GET_ACCEPT_SOCKET; | |
383 | b->shutdown = (int)num; | |
384 | b->init = 1; | |
385 | break; | |
386 | case BIO_C_GET_FD: | |
387 | if (b->init) { | |
388 | ip = (int *)ptr; | |
389 | if (ip != NULL) | |
390 | *ip = data->accept_sock; | |
391 | ret = data->accept_sock; | |
392 | } else | |
393 | ret = -1; | |
394 | break; | |
395 | case BIO_C_GET_ACCEPT: | |
396 | if (b->init) { | |
397 | if (ptr != NULL) { | |
398 | pp = (char **)ptr; | |
399 | *pp = data->param_addr; | |
400 | } else | |
401 | ret = -1; | |
402 | } else | |
403 | ret = -1; | |
404 | break; | |
405 | case BIO_CTRL_GET_CLOSE: | |
406 | ret = b->shutdown; | |
407 | break; | |
408 | case BIO_CTRL_SET_CLOSE: | |
409 | b->shutdown = (int)num; | |
410 | break; | |
411 | case BIO_CTRL_PENDING: | |
412 | case BIO_CTRL_WPENDING: | |
413 | ret = 0; | |
414 | break; | |
415 | case BIO_CTRL_FLUSH: | |
416 | break; | |
417 | case BIO_C_SET_BIND_MODE: | |
418 | data->bind_mode = (int)num; | |
419 | break; | |
420 | case BIO_C_GET_BIND_MODE: | |
421 | ret = (long)data->bind_mode; | |
422 | break; | |
423 | case BIO_CTRL_DUP: | |
424 | /*- dbio=(BIO *)ptr; | |
425 | if (data->param_port) EAY EAY | |
426 | BIO_set_port(dbio,data->param_port); | |
427 | if (data->param_hostname) | |
428 | BIO_set_hostname(dbio,data->param_hostname); | |
429 | BIO_set_nbio(dbio,data->nbio); */ | |
430 | break; | |
431 | ||
432 | default: | |
433 | ret = 0; | |
434 | break; | |
435 | } | |
436 | return (ret); | |
437 | } | |
d02b48c6 | 438 | |
0e1c0612 | 439 | static int acpt_puts(BIO *bp, const char *str) |
40720ce3 MC |
440 | { |
441 | int n, ret; | |
d02b48c6 | 442 | |
40720ce3 MC |
443 | n = strlen(str); |
444 | ret = acpt_write(bp, str, n); | |
445 | return (ret); | |
446 | } | |
d02b48c6 | 447 | |
6b691a5c | 448 | BIO *BIO_new_accept(char *str) |
40720ce3 MC |
449 | { |
450 | BIO *ret; | |
451 | ||
452 | ret = BIO_new(BIO_s_accept()); | |
453 | if (ret == NULL) | |
454 | return (NULL); | |
455 | if (BIO_set_accept_port(ret, str)) | |
456 | return (ret); | |
457 | else { | |
458 | BIO_free(ret); | |
459 | return (NULL); | |
460 | } | |
461 | } | |
d02b48c6 RE |
462 | |
463 | #endif |