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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. | |
0f113f3e | 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). | |
0f113f3e | 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. | |
0f113f3e | 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 :-). | |
0f113f3e | 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)" | |
0f113f3e | 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. | |
0f113f3e | 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 | ||
0f113f3e | 67 | # if (defined(OPENSSL_SYS_VMS) && __VMS_VER < 70000000) |
75e0770d | 68 | /* FIONBIO used as a switch to enable ioctl, and that isn't in VMS < 7.0 */ |
0f113f3e MC |
69 | # undef FIONBIO |
70 | # endif | |
71 | ||
72 | typedef struct bio_accept_st { | |
73 | int state; | |
74 | char *param_addr; | |
75 | int accept_sock; | |
76 | int accept_nbio; | |
77 | char *addr; | |
78 | int nbio; | |
79 | /* | |
80 | * If 0, it means normal, if 1, do a connect on bind failure, and if | |
81 | * there is no-one listening, bind with SO_REUSEADDR. If 2, always use | |
82 | * SO_REUSEADDR. | |
83 | */ | |
84 | int bind_mode; | |
85 | BIO *bio_chain; | |
86 | } BIO_ACCEPT; | |
d02b48c6 | 87 | |
0e1c0612 UM |
88 | static int acpt_write(BIO *h, const char *buf, int num); |
89 | static int acpt_read(BIO *h, char *buf, int size); | |
90 | static int acpt_puts(BIO *h, const char *str); | |
91 | static long acpt_ctrl(BIO *h, int cmd, long arg1, void *arg2); | |
d02b48c6 RE |
92 | static int acpt_new(BIO *h); |
93 | static int acpt_free(BIO *data); | |
d02b48c6 RE |
94 | static int acpt_state(BIO *b, BIO_ACCEPT *c); |
95 | static void acpt_close_socket(BIO *data); | |
0f113f3e | 96 | static BIO_ACCEPT *BIO_ACCEPT_new(void); |
b3e72fc3 | 97 | static void BIO_ACCEPT_free(BIO_ACCEPT *a); |
d02b48c6 | 98 | |
0f113f3e MC |
99 | # define ACPT_S_BEFORE 1 |
100 | # define ACPT_S_GET_ACCEPT_SOCKET 2 | |
101 | # define ACPT_S_OK 3 | |
102 | ||
103 | static BIO_METHOD methods_acceptp = { | |
104 | BIO_TYPE_ACCEPT, | |
105 | "socket accept", | |
106 | acpt_write, | |
107 | acpt_read, | |
108 | acpt_puts, | |
109 | NULL, /* connect_gets, */ | |
110 | acpt_ctrl, | |
111 | acpt_new, | |
112 | acpt_free, | |
113 | NULL, | |
114 | }; | |
d02b48c6 | 115 | |
6b691a5c | 116 | BIO_METHOD *BIO_s_accept(void) |
0f113f3e MC |
117 | { |
118 | return (&methods_acceptp); | |
119 | } | |
d02b48c6 | 120 | |
6b691a5c | 121 | static int acpt_new(BIO *bi) |
0f113f3e MC |
122 | { |
123 | BIO_ACCEPT *ba; | |
124 | ||
125 | bi->init = 0; | |
126 | bi->num = INVALID_SOCKET; | |
127 | bi->flags = 0; | |
128 | if ((ba = BIO_ACCEPT_new()) == NULL) | |
129 | return (0); | |
130 | bi->ptr = (char *)ba; | |
131 | ba->state = ACPT_S_BEFORE; | |
132 | bi->shutdown = 1; | |
133 | return (1); | |
134 | } | |
d02b48c6 | 135 | |
b3e72fc3 | 136 | static BIO_ACCEPT *BIO_ACCEPT_new(void) |
0f113f3e MC |
137 | { |
138 | BIO_ACCEPT *ret; | |
d02b48c6 | 139 | |
0f113f3e MC |
140 | if ((ret = (BIO_ACCEPT *)OPENSSL_malloc(sizeof(BIO_ACCEPT))) == NULL) |
141 | return (NULL); | |
d02b48c6 | 142 | |
0f113f3e MC |
143 | memset(ret, 0, sizeof(BIO_ACCEPT)); |
144 | ret->accept_sock = INVALID_SOCKET; | |
145 | ret->bind_mode = BIO_BIND_NORMAL; | |
146 | return (ret); | |
147 | } | |
d02b48c6 | 148 | |
b3e72fc3 | 149 | static void BIO_ACCEPT_free(BIO_ACCEPT *a) |
0f113f3e MC |
150 | { |
151 | if (a == NULL) | |
152 | return; | |
153 | ||
154 | if (a->param_addr != NULL) | |
155 | OPENSSL_free(a->param_addr); | |
156 | if (a->addr != NULL) | |
157 | OPENSSL_free(a->addr); | |
158 | if (a->bio_chain != NULL) | |
159 | BIO_free(a->bio_chain); | |
160 | OPENSSL_free(a); | |
161 | } | |
d02b48c6 | 162 | |
6b691a5c | 163 | static void acpt_close_socket(BIO *bio) |
0f113f3e MC |
164 | { |
165 | BIO_ACCEPT *c; | |
166 | ||
167 | c = (BIO_ACCEPT *)bio->ptr; | |
168 | if (c->accept_sock != INVALID_SOCKET) { | |
169 | shutdown(c->accept_sock, 2); | |
170 | closesocket(c->accept_sock); | |
171 | c->accept_sock = INVALID_SOCKET; | |
172 | bio->num = INVALID_SOCKET; | |
173 | } | |
174 | } | |
d02b48c6 | 175 | |
6b691a5c | 176 | static int acpt_free(BIO *a) |
0f113f3e MC |
177 | { |
178 | BIO_ACCEPT *data; | |
179 | ||
180 | if (a == NULL) | |
181 | return (0); | |
182 | data = (BIO_ACCEPT *)a->ptr; | |
183 | ||
184 | if (a->shutdown) { | |
185 | acpt_close_socket(a); | |
186 | BIO_ACCEPT_free(data); | |
187 | a->ptr = NULL; | |
188 | a->flags = 0; | |
189 | a->init = 0; | |
190 | } | |
191 | return (1); | |
192 | } | |
193 | ||
6b691a5c | 194 | static int acpt_state(BIO *b, BIO_ACCEPT *c) |
0f113f3e MC |
195 | { |
196 | BIO *bio = NULL, *dbio; | |
197 | int s = -1; | |
198 | int i; | |
199 | ||
200 | again: | |
201 | switch (c->state) { | |
202 | case ACPT_S_BEFORE: | |
203 | if (c->param_addr == NULL) { | |
204 | BIOerr(BIO_F_ACPT_STATE, BIO_R_NO_ACCEPT_PORT_SPECIFIED); | |
205 | return (-1); | |
206 | } | |
207 | s = BIO_get_accept_socket(c->param_addr, c->bind_mode); | |
208 | if (s == INVALID_SOCKET) | |
209 | return (-1); | |
210 | ||
211 | if (c->accept_nbio) { | |
212 | if (!BIO_socket_nbio(s, 1)) { | |
213 | closesocket(s); | |
214 | BIOerr(BIO_F_ACPT_STATE, | |
215 | BIO_R_ERROR_SETTING_NBIO_ON_ACCEPT_SOCKET); | |
216 | return (-1); | |
217 | } | |
218 | } | |
219 | c->accept_sock = s; | |
220 | b->num = s; | |
221 | c->state = ACPT_S_GET_ACCEPT_SOCKET; | |
222 | return (1); | |
223 | /* break; */ | |
224 | case ACPT_S_GET_ACCEPT_SOCKET: | |
225 | if (b->next_bio != NULL) { | |
226 | c->state = ACPT_S_OK; | |
227 | goto again; | |
228 | } | |
229 | BIO_clear_retry_flags(b); | |
230 | b->retry_reason = 0; | |
231 | i = BIO_accept(c->accept_sock, &(c->addr)); | |
232 | ||
233 | /* -2 return means we should retry */ | |
234 | if (i == -2) { | |
235 | BIO_set_retry_special(b); | |
236 | b->retry_reason = BIO_RR_ACCEPT; | |
237 | return -1; | |
238 | } | |
239 | ||
240 | if (i < 0) | |
241 | return (i); | |
242 | ||
243 | bio = BIO_new_socket(i, BIO_CLOSE); | |
244 | if (bio == NULL) | |
245 | goto err; | |
246 | ||
247 | BIO_set_callback(bio, BIO_get_callback(b)); | |
248 | BIO_set_callback_arg(bio, BIO_get_callback_arg(b)); | |
249 | ||
250 | if (c->nbio) { | |
251 | if (!BIO_socket_nbio(i, 1)) { | |
252 | BIOerr(BIO_F_ACPT_STATE, | |
253 | BIO_R_ERROR_SETTING_NBIO_ON_ACCEPTED_SOCKET); | |
254 | goto err; | |
255 | } | |
256 | } | |
257 | ||
258 | /* | |
259 | * If the accept BIO has an bio_chain, we dup it and put the new | |
260 | * socket at the end. | |
261 | */ | |
262 | if (c->bio_chain != NULL) { | |
263 | if ((dbio = BIO_dup_chain(c->bio_chain)) == NULL) | |
264 | goto err; | |
265 | if (!BIO_push(dbio, bio)) | |
266 | goto err; | |
267 | bio = dbio; | |
268 | } | |
269 | if (BIO_push(b, bio) == NULL) | |
270 | goto err; | |
271 | ||
272 | c->state = ACPT_S_OK; | |
273 | return (1); | |
274 | err: | |
275 | if (bio != NULL) | |
276 | BIO_free(bio); | |
277 | else if (s >= 0) | |
278 | closesocket(s); | |
279 | return (0); | |
280 | /* break; */ | |
281 | case ACPT_S_OK: | |
282 | if (b->next_bio == NULL) { | |
283 | c->state = ACPT_S_GET_ACCEPT_SOCKET; | |
284 | goto again; | |
285 | } | |
286 | return (1); | |
287 | /* break; */ | |
288 | default: | |
289 | return (0); | |
290 | /* break; */ | |
291 | } | |
292 | ||
293 | } | |
d02b48c6 | 294 | |
6b691a5c | 295 | static int acpt_read(BIO *b, char *out, int outl) |
0f113f3e MC |
296 | { |
297 | int ret = 0; | |
298 | BIO_ACCEPT *data; | |
d02b48c6 | 299 | |
0f113f3e MC |
300 | BIO_clear_retry_flags(b); |
301 | data = (BIO_ACCEPT *)b->ptr; | |
d02b48c6 | 302 | |
0f113f3e MC |
303 | while (b->next_bio == NULL) { |
304 | ret = acpt_state(b, data); | |
305 | if (ret <= 0) | |
306 | return (ret); | |
307 | } | |
d02b48c6 | 308 | |
0f113f3e MC |
309 | ret = BIO_read(b->next_bio, out, outl); |
310 | BIO_copy_next_retry(b); | |
311 | return (ret); | |
312 | } | |
d02b48c6 | 313 | |
0e1c0612 | 314 | static int acpt_write(BIO *b, const char *in, int inl) |
0f113f3e MC |
315 | { |
316 | int ret; | |
317 | BIO_ACCEPT *data; | |
d02b48c6 | 318 | |
0f113f3e MC |
319 | BIO_clear_retry_flags(b); |
320 | data = (BIO_ACCEPT *)b->ptr; | |
d02b48c6 | 321 | |
0f113f3e MC |
322 | while (b->next_bio == NULL) { |
323 | ret = acpt_state(b, data); | |
324 | if (ret <= 0) | |
325 | return (ret); | |
326 | } | |
d02b48c6 | 327 | |
0f113f3e MC |
328 | ret = BIO_write(b->next_bio, in, inl); |
329 | BIO_copy_next_retry(b); | |
330 | return (ret); | |
331 | } | |
d02b48c6 | 332 | |
0e1c0612 | 333 | static long acpt_ctrl(BIO *b, int cmd, long num, void *ptr) |
0f113f3e MC |
334 | { |
335 | int *ip; | |
336 | long ret = 1; | |
337 | BIO_ACCEPT *data; | |
338 | char **pp; | |
339 | ||
340 | data = (BIO_ACCEPT *)b->ptr; | |
341 | ||
342 | switch (cmd) { | |
343 | case BIO_CTRL_RESET: | |
344 | ret = 0; | |
345 | data->state = ACPT_S_BEFORE; | |
346 | acpt_close_socket(b); | |
347 | b->flags = 0; | |
348 | break; | |
349 | case BIO_C_DO_STATE_MACHINE: | |
350 | /* use this one to start the connection */ | |
351 | ret = (long)acpt_state(b, data); | |
352 | break; | |
353 | case BIO_C_SET_ACCEPT: | |
354 | if (ptr != NULL) { | |
355 | if (num == 0) { | |
356 | b->init = 1; | |
357 | if (data->param_addr != NULL) | |
358 | OPENSSL_free(data->param_addr); | |
359 | data->param_addr = BUF_strdup(ptr); | |
360 | } else if (num == 1) { | |
361 | data->accept_nbio = (ptr != NULL); | |
362 | } else if (num == 2) { | |
363 | if (data->bio_chain != NULL) | |
364 | BIO_free(data->bio_chain); | |
365 | data->bio_chain = (BIO *)ptr; | |
366 | } | |
367 | } | |
368 | break; | |
369 | case BIO_C_SET_NBIO: | |
370 | data->nbio = (int)num; | |
371 | break; | |
372 | case BIO_C_SET_FD: | |
373 | b->init = 1; | |
374 | b->num = *((int *)ptr); | |
375 | data->accept_sock = b->num; | |
376 | data->state = ACPT_S_GET_ACCEPT_SOCKET; | |
377 | b->shutdown = (int)num; | |
378 | b->init = 1; | |
379 | break; | |
380 | case BIO_C_GET_FD: | |
381 | if (b->init) { | |
382 | ip = (int *)ptr; | |
383 | if (ip != NULL) | |
384 | *ip = data->accept_sock; | |
385 | ret = data->accept_sock; | |
386 | } else | |
387 | ret = -1; | |
388 | break; | |
389 | case BIO_C_GET_ACCEPT: | |
390 | if (b->init) { | |
391 | if (ptr != NULL) { | |
392 | pp = (char **)ptr; | |
393 | *pp = data->param_addr; | |
394 | } else | |
395 | ret = -1; | |
396 | } else | |
397 | ret = -1; | |
398 | break; | |
399 | case BIO_CTRL_GET_CLOSE: | |
400 | ret = b->shutdown; | |
401 | break; | |
402 | case BIO_CTRL_SET_CLOSE: | |
403 | b->shutdown = (int)num; | |
404 | break; | |
405 | case BIO_CTRL_PENDING: | |
406 | case BIO_CTRL_WPENDING: | |
407 | ret = 0; | |
408 | break; | |
409 | case BIO_CTRL_FLUSH: | |
410 | break; | |
411 | case BIO_C_SET_BIND_MODE: | |
412 | data->bind_mode = (int)num; | |
413 | break; | |
414 | case BIO_C_GET_BIND_MODE: | |
415 | ret = (long)data->bind_mode; | |
416 | break; | |
417 | case BIO_CTRL_DUP: | |
418 | /*- dbio=(BIO *)ptr; | |
419 | if (data->param_port) EAY EAY | |
420 | BIO_set_port(dbio,data->param_port); | |
421 | if (data->param_hostname) | |
422 | BIO_set_hostname(dbio,data->param_hostname); | |
423 | BIO_set_nbio(dbio,data->nbio); */ | |
424 | break; | |
425 | ||
426 | default: | |
427 | ret = 0; | |
428 | break; | |
429 | } | |
430 | return (ret); | |
431 | } | |
d02b48c6 | 432 | |
0e1c0612 | 433 | static int acpt_puts(BIO *bp, const char *str) |
0f113f3e MC |
434 | { |
435 | int n, ret; | |
d02b48c6 | 436 | |
0f113f3e MC |
437 | n = strlen(str); |
438 | ret = acpt_write(bp, str, n); | |
439 | return (ret); | |
440 | } | |
d02b48c6 | 441 | |
c45a48c1 | 442 | BIO *BIO_new_accept(const char *str) |
0f113f3e MC |
443 | { |
444 | BIO *ret; | |
445 | ||
446 | ret = BIO_new(BIO_s_accept()); | |
447 | if (ret == NULL) | |
448 | return (NULL); | |
449 | if (BIO_set_accept_port(ret, str)) | |
450 | return (ret); | |
451 | else { | |
452 | BIO_free(ret); | |
453 | return (NULL); | |
454 | } | |
455 | } | |
d02b48c6 RE |
456 | |
457 | #endif |