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58964a49 | 1 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
d02b48c6 RE |
2 | * All rights reserved. |
3 | * | |
4 | * This package is an SSL implementation written | |
5 | * by Eric Young (eay@cryptsoft.com). | |
6 | * The implementation was written so as to conform with Netscapes SSL. | |
0f113f3e | 7 | * |
d02b48c6 RE |
8 | * This library is free for commercial and non-commercial use as long as |
9 | * the following conditions are aheared to. The following conditions | |
10 | * apply to all code found in this distribution, be it the RC4, RSA, | |
11 | * lhash, DES, etc., code; not just the SSL code. The SSL documentation | |
12 | * included with this distribution is covered by the same copyright terms | |
13 | * except that the holder is Tim Hudson (tjh@cryptsoft.com). | |
0f113f3e | 14 | * |
d02b48c6 RE |
15 | * Copyright remains Eric Young's, and as such any Copyright notices in |
16 | * the code are not to be removed. | |
17 | * If this package is used in a product, Eric Young should be given attribution | |
18 | * as the author of the parts of the library used. | |
19 | * This can be in the form of a textual message at program startup or | |
20 | * in documentation (online or textual) provided with the package. | |
0f113f3e | 21 | * |
d02b48c6 RE |
22 | * Redistribution and use in source and binary forms, with or without |
23 | * modification, are permitted provided that the following conditions | |
24 | * are met: | |
25 | * 1. Redistributions of source code must retain the copyright | |
26 | * notice, this list of conditions and the following disclaimer. | |
27 | * 2. Redistributions in binary form must reproduce the above copyright | |
28 | * notice, this list of conditions and the following disclaimer in the | |
29 | * documentation and/or other materials provided with the distribution. | |
30 | * 3. All advertising materials mentioning features or use of this software | |
31 | * must display the following acknowledgement: | |
32 | * "This product includes cryptographic software written by | |
33 | * Eric Young (eay@cryptsoft.com)" | |
34 | * The word 'cryptographic' can be left out if the rouines from the library | |
35 | * being used are not cryptographic related :-). | |
0f113f3e | 36 | * 4. If you include any Windows specific code (or a derivative thereof) from |
d02b48c6 RE |
37 | * the apps directory (application code) you must include an acknowledgement: |
38 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
0f113f3e | 39 | * |
d02b48c6 RE |
40 | * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
41 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
42 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
43 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE | |
44 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
45 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
46 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
47 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
48 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
49 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
50 | * SUCH DAMAGE. | |
0f113f3e | 51 | * |
d02b48c6 RE |
52 | * The licence and distribution terms for any publically available version or |
53 | * derivative of this code cannot be changed. i.e. this code cannot simply be | |
54 | * copied and put under another distribution licence | |
55 | * [including the GNU Public Licence.] | |
56 | */ | |
57 | ||
d02b48c6 RE |
58 | #include <stdio.h> |
59 | #include <errno.h> | |
60 | #define USE_SOCKETS | |
b39fc560 | 61 | #include "internal/cryptlib.h" |
ec577822 | 62 | #include <openssl/bio.h> |
d02b48c6 | 63 | |
9ba4cc00 RL |
64 | #ifndef OPENSSL_NO_SOCK |
65 | ||
0f113f3e | 66 | # if (defined(OPENSSL_SYS_VMS) && __VMS_VER < 70000000) |
75e0770d | 67 | /* FIONBIO used as a switch to enable ioctl, and that isn't in VMS < 7.0 */ |
0f113f3e MC |
68 | # undef FIONBIO |
69 | # endif | |
70 | ||
71 | typedef struct bio_accept_st { | |
72 | int state; | |
73 | char *param_addr; | |
74 | int accept_sock; | |
75 | int accept_nbio; | |
76 | char *addr; | |
77 | int nbio; | |
78 | /* | |
79 | * If 0, it means normal, if 1, do a connect on bind failure, and if | |
80 | * there is no-one listening, bind with SO_REUSEADDR. If 2, always use | |
81 | * SO_REUSEADDR. | |
82 | */ | |
83 | int bind_mode; | |
84 | BIO *bio_chain; | |
85 | } BIO_ACCEPT; | |
d02b48c6 | 86 | |
0e1c0612 UM |
87 | static int acpt_write(BIO *h, const char *buf, int num); |
88 | static int acpt_read(BIO *h, char *buf, int size); | |
89 | static int acpt_puts(BIO *h, const char *str); | |
90 | static long acpt_ctrl(BIO *h, int cmd, long arg1, void *arg2); | |
d02b48c6 RE |
91 | static int acpt_new(BIO *h); |
92 | static int acpt_free(BIO *data); | |
d02b48c6 RE |
93 | static int acpt_state(BIO *b, BIO_ACCEPT *c); |
94 | static void acpt_close_socket(BIO *data); | |
0f113f3e | 95 | static BIO_ACCEPT *BIO_ACCEPT_new(void); |
b3e72fc3 | 96 | static void BIO_ACCEPT_free(BIO_ACCEPT *a); |
d02b48c6 | 97 | |
0f113f3e MC |
98 | # define ACPT_S_BEFORE 1 |
99 | # define ACPT_S_GET_ACCEPT_SOCKET 2 | |
100 | # define ACPT_S_OK 3 | |
101 | ||
102 | static BIO_METHOD methods_acceptp = { | |
103 | BIO_TYPE_ACCEPT, | |
104 | "socket accept", | |
105 | acpt_write, | |
106 | acpt_read, | |
107 | acpt_puts, | |
108 | NULL, /* connect_gets, */ | |
109 | acpt_ctrl, | |
110 | acpt_new, | |
111 | acpt_free, | |
112 | NULL, | |
113 | }; | |
d02b48c6 | 114 | |
6b691a5c | 115 | BIO_METHOD *BIO_s_accept(void) |
0f113f3e MC |
116 | { |
117 | return (&methods_acceptp); | |
118 | } | |
d02b48c6 | 119 | |
6b691a5c | 120 | static int acpt_new(BIO *bi) |
0f113f3e MC |
121 | { |
122 | BIO_ACCEPT *ba; | |
123 | ||
124 | bi->init = 0; | |
b13fdc48 | 125 | bi->num = (int)INVALID_SOCKET; |
0f113f3e MC |
126 | bi->flags = 0; |
127 | if ((ba = BIO_ACCEPT_new()) == NULL) | |
128 | return (0); | |
129 | bi->ptr = (char *)ba; | |
130 | ba->state = ACPT_S_BEFORE; | |
131 | bi->shutdown = 1; | |
132 | return (1); | |
133 | } | |
d02b48c6 | 134 | |
b3e72fc3 | 135 | static BIO_ACCEPT *BIO_ACCEPT_new(void) |
0f113f3e MC |
136 | { |
137 | BIO_ACCEPT *ret; | |
d02b48c6 | 138 | |
b51bce94 | 139 | if ((ret = OPENSSL_zalloc(sizeof(*ret))) == NULL) |
0f113f3e | 140 | return (NULL); |
b13fdc48 | 141 | ret->accept_sock = (int)INVALID_SOCKET; |
0f113f3e MC |
142 | ret->bind_mode = BIO_BIND_NORMAL; |
143 | return (ret); | |
144 | } | |
d02b48c6 | 145 | |
b3e72fc3 | 146 | static void BIO_ACCEPT_free(BIO_ACCEPT *a) |
0f113f3e MC |
147 | { |
148 | if (a == NULL) | |
149 | return; | |
150 | ||
b548a1f1 RS |
151 | OPENSSL_free(a->param_addr); |
152 | OPENSSL_free(a->addr); | |
ca3a82c3 | 153 | BIO_free(a->bio_chain); |
0f113f3e MC |
154 | OPENSSL_free(a); |
155 | } | |
d02b48c6 | 156 | |
6b691a5c | 157 | static void acpt_close_socket(BIO *bio) |
0f113f3e MC |
158 | { |
159 | BIO_ACCEPT *c; | |
160 | ||
161 | c = (BIO_ACCEPT *)bio->ptr; | |
b13fdc48 | 162 | if (c->accept_sock != (int)INVALID_SOCKET) { |
0f113f3e MC |
163 | shutdown(c->accept_sock, 2); |
164 | closesocket(c->accept_sock); | |
b13fdc48 AP |
165 | c->accept_sock = (int)INVALID_SOCKET; |
166 | bio->num = (int)INVALID_SOCKET; | |
0f113f3e MC |
167 | } |
168 | } | |
d02b48c6 | 169 | |
6b691a5c | 170 | static int acpt_free(BIO *a) |
0f113f3e MC |
171 | { |
172 | BIO_ACCEPT *data; | |
173 | ||
174 | if (a == NULL) | |
175 | return (0); | |
176 | data = (BIO_ACCEPT *)a->ptr; | |
177 | ||
178 | if (a->shutdown) { | |
179 | acpt_close_socket(a); | |
180 | BIO_ACCEPT_free(data); | |
181 | a->ptr = NULL; | |
182 | a->flags = 0; | |
183 | a->init = 0; | |
184 | } | |
185 | return (1); | |
186 | } | |
187 | ||
6b691a5c | 188 | static int acpt_state(BIO *b, BIO_ACCEPT *c) |
0f113f3e MC |
189 | { |
190 | BIO *bio = NULL, *dbio; | |
191 | int s = -1; | |
192 | int i; | |
193 | ||
194 | again: | |
195 | switch (c->state) { | |
196 | case ACPT_S_BEFORE: | |
197 | if (c->param_addr == NULL) { | |
198 | BIOerr(BIO_F_ACPT_STATE, BIO_R_NO_ACCEPT_PORT_SPECIFIED); | |
199 | return (-1); | |
200 | } | |
201 | s = BIO_get_accept_socket(c->param_addr, c->bind_mode); | |
b13fdc48 | 202 | if (s == (int)INVALID_SOCKET) |
0f113f3e MC |
203 | return (-1); |
204 | ||
205 | if (c->accept_nbio) { | |
206 | if (!BIO_socket_nbio(s, 1)) { | |
207 | closesocket(s); | |
208 | BIOerr(BIO_F_ACPT_STATE, | |
209 | BIO_R_ERROR_SETTING_NBIO_ON_ACCEPT_SOCKET); | |
210 | return (-1); | |
211 | } | |
212 | } | |
213 | c->accept_sock = s; | |
214 | b->num = s; | |
215 | c->state = ACPT_S_GET_ACCEPT_SOCKET; | |
216 | return (1); | |
217 | /* break; */ | |
218 | case ACPT_S_GET_ACCEPT_SOCKET: | |
219 | if (b->next_bio != NULL) { | |
220 | c->state = ACPT_S_OK; | |
221 | goto again; | |
222 | } | |
223 | BIO_clear_retry_flags(b); | |
224 | b->retry_reason = 0; | |
225 | i = BIO_accept(c->accept_sock, &(c->addr)); | |
226 | ||
227 | /* -2 return means we should retry */ | |
228 | if (i == -2) { | |
229 | BIO_set_retry_special(b); | |
230 | b->retry_reason = BIO_RR_ACCEPT; | |
231 | return -1; | |
232 | } | |
233 | ||
234 | if (i < 0) | |
235 | return (i); | |
236 | ||
237 | bio = BIO_new_socket(i, BIO_CLOSE); | |
238 | if (bio == NULL) | |
239 | goto err; | |
240 | ||
241 | BIO_set_callback(bio, BIO_get_callback(b)); | |
242 | BIO_set_callback_arg(bio, BIO_get_callback_arg(b)); | |
243 | ||
244 | if (c->nbio) { | |
245 | if (!BIO_socket_nbio(i, 1)) { | |
246 | BIOerr(BIO_F_ACPT_STATE, | |
247 | BIO_R_ERROR_SETTING_NBIO_ON_ACCEPTED_SOCKET); | |
248 | goto err; | |
249 | } | |
250 | } | |
251 | ||
252 | /* | |
253 | * If the accept BIO has an bio_chain, we dup it and put the new | |
254 | * socket at the end. | |
255 | */ | |
256 | if (c->bio_chain != NULL) { | |
257 | if ((dbio = BIO_dup_chain(c->bio_chain)) == NULL) | |
258 | goto err; | |
259 | if (!BIO_push(dbio, bio)) | |
260 | goto err; | |
261 | bio = dbio; | |
262 | } | |
263 | if (BIO_push(b, bio) == NULL) | |
264 | goto err; | |
265 | ||
266 | c->state = ACPT_S_OK; | |
267 | return (1); | |
268 | err: | |
269 | if (bio != NULL) | |
270 | BIO_free(bio); | |
271 | else if (s >= 0) | |
272 | closesocket(s); | |
273 | return (0); | |
274 | /* break; */ | |
275 | case ACPT_S_OK: | |
276 | if (b->next_bio == NULL) { | |
277 | c->state = ACPT_S_GET_ACCEPT_SOCKET; | |
278 | goto again; | |
279 | } | |
280 | return (1); | |
281 | /* break; */ | |
282 | default: | |
283 | return (0); | |
284 | /* break; */ | |
285 | } | |
286 | ||
287 | } | |
d02b48c6 | 288 | |
6b691a5c | 289 | static int acpt_read(BIO *b, char *out, int outl) |
0f113f3e MC |
290 | { |
291 | int ret = 0; | |
292 | BIO_ACCEPT *data; | |
d02b48c6 | 293 | |
0f113f3e MC |
294 | BIO_clear_retry_flags(b); |
295 | data = (BIO_ACCEPT *)b->ptr; | |
d02b48c6 | 296 | |
0f113f3e MC |
297 | while (b->next_bio == NULL) { |
298 | ret = acpt_state(b, data); | |
299 | if (ret <= 0) | |
300 | return (ret); | |
301 | } | |
d02b48c6 | 302 | |
0f113f3e MC |
303 | ret = BIO_read(b->next_bio, out, outl); |
304 | BIO_copy_next_retry(b); | |
305 | return (ret); | |
306 | } | |
d02b48c6 | 307 | |
0e1c0612 | 308 | static int acpt_write(BIO *b, const char *in, int inl) |
0f113f3e MC |
309 | { |
310 | int ret; | |
311 | BIO_ACCEPT *data; | |
d02b48c6 | 312 | |
0f113f3e MC |
313 | BIO_clear_retry_flags(b); |
314 | data = (BIO_ACCEPT *)b->ptr; | |
d02b48c6 | 315 | |
0f113f3e MC |
316 | while (b->next_bio == NULL) { |
317 | ret = acpt_state(b, data); | |
318 | if (ret <= 0) | |
319 | return (ret); | |
320 | } | |
d02b48c6 | 321 | |
0f113f3e MC |
322 | ret = BIO_write(b->next_bio, in, inl); |
323 | BIO_copy_next_retry(b); | |
324 | return (ret); | |
325 | } | |
d02b48c6 | 326 | |
0e1c0612 | 327 | static long acpt_ctrl(BIO *b, int cmd, long num, void *ptr) |
0f113f3e MC |
328 | { |
329 | int *ip; | |
330 | long ret = 1; | |
331 | BIO_ACCEPT *data; | |
332 | char **pp; | |
333 | ||
334 | data = (BIO_ACCEPT *)b->ptr; | |
335 | ||
336 | switch (cmd) { | |
337 | case BIO_CTRL_RESET: | |
338 | ret = 0; | |
339 | data->state = ACPT_S_BEFORE; | |
340 | acpt_close_socket(b); | |
341 | b->flags = 0; | |
342 | break; | |
343 | case BIO_C_DO_STATE_MACHINE: | |
344 | /* use this one to start the connection */ | |
345 | ret = (long)acpt_state(b, data); | |
346 | break; | |
347 | case BIO_C_SET_ACCEPT: | |
348 | if (ptr != NULL) { | |
349 | if (num == 0) { | |
350 | b->init = 1; | |
b548a1f1 | 351 | OPENSSL_free(data->param_addr); |
7644a9ae | 352 | data->param_addr = OPENSSL_strdup(ptr); |
0f113f3e MC |
353 | } else if (num == 1) { |
354 | data->accept_nbio = (ptr != NULL); | |
355 | } else if (num == 2) { | |
ca3a82c3 | 356 | BIO_free(data->bio_chain); |
0f113f3e MC |
357 | data->bio_chain = (BIO *)ptr; |
358 | } | |
359 | } | |
360 | break; | |
361 | case BIO_C_SET_NBIO: | |
362 | data->nbio = (int)num; | |
363 | break; | |
364 | case BIO_C_SET_FD: | |
365 | b->init = 1; | |
366 | b->num = *((int *)ptr); | |
367 | data->accept_sock = b->num; | |
368 | data->state = ACPT_S_GET_ACCEPT_SOCKET; | |
369 | b->shutdown = (int)num; | |
370 | b->init = 1; | |
371 | break; | |
372 | case BIO_C_GET_FD: | |
373 | if (b->init) { | |
374 | ip = (int *)ptr; | |
375 | if (ip != NULL) | |
376 | *ip = data->accept_sock; | |
377 | ret = data->accept_sock; | |
378 | } else | |
379 | ret = -1; | |
380 | break; | |
381 | case BIO_C_GET_ACCEPT: | |
382 | if (b->init) { | |
383 | if (ptr != NULL) { | |
384 | pp = (char **)ptr; | |
385 | *pp = data->param_addr; | |
386 | } else | |
387 | ret = -1; | |
388 | } else | |
389 | ret = -1; | |
390 | break; | |
391 | case BIO_CTRL_GET_CLOSE: | |
392 | ret = b->shutdown; | |
393 | break; | |
394 | case BIO_CTRL_SET_CLOSE: | |
395 | b->shutdown = (int)num; | |
396 | break; | |
397 | case BIO_CTRL_PENDING: | |
398 | case BIO_CTRL_WPENDING: | |
399 | ret = 0; | |
400 | break; | |
401 | case BIO_CTRL_FLUSH: | |
402 | break; | |
403 | case BIO_C_SET_BIND_MODE: | |
404 | data->bind_mode = (int)num; | |
405 | break; | |
406 | case BIO_C_GET_BIND_MODE: | |
407 | ret = (long)data->bind_mode; | |
408 | break; | |
409 | case BIO_CTRL_DUP: | |
35a1cc90 MC |
410 | /*- dbio=(BIO *)ptr; |
411 | if (data->param_port) EAY EAY | |
412 | BIO_set_port(dbio,data->param_port); | |
413 | if (data->param_hostname) | |
414 | BIO_set_hostname(dbio,data->param_hostname); | |
415 | BIO_set_nbio(dbio,data->nbio); */ | |
0f113f3e MC |
416 | break; |
417 | ||
418 | default: | |
419 | ret = 0; | |
420 | break; | |
421 | } | |
422 | return (ret); | |
423 | } | |
d02b48c6 | 424 | |
0e1c0612 | 425 | static int acpt_puts(BIO *bp, const char *str) |
0f113f3e MC |
426 | { |
427 | int n, ret; | |
d02b48c6 | 428 | |
0f113f3e MC |
429 | n = strlen(str); |
430 | ret = acpt_write(bp, str, n); | |
431 | return (ret); | |
432 | } | |
d02b48c6 | 433 | |
c45a48c1 | 434 | BIO *BIO_new_accept(const char *str) |
0f113f3e MC |
435 | { |
436 | BIO *ret; | |
437 | ||
438 | ret = BIO_new(BIO_s_accept()); | |
439 | if (ret == NULL) | |
440 | return (NULL); | |
441 | if (BIO_set_accept_port(ret, str)) | |
442 | return (ret); | |
ca3a82c3 RS |
443 | BIO_free(ret); |
444 | return (NULL); | |
0f113f3e | 445 | } |
d02b48c6 RE |
446 | |
447 | #endif |