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diff --git a/src/lib/libcrypto/bio/bss_acpt.c b/src/lib/libcrypto/bio/bss_acpt.c
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1/* $OpenBSD: bss_acpt.c,v 1.26 2015/07/18 22:09:30 beck Exp $ */
2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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.
8 *
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).
15 *
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.
22 *
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 :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
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.
52 *
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
59#include <sys/socket.h>
60
61#include <errno.h>
62#include <stdio.h>
63#include <string.h>
64#include <unistd.h>
65
66#include <openssl/bio.h>
67#include <openssl/buffer.h>
68#include <openssl/err.h>
69
70#define SOCKET_PROTOCOL IPPROTO_TCP
71
72typedef struct bio_accept_st {
73 int state;
74 char *param_addr;
75
76 int accept_sock;
77 int accept_nbio;
78
79 char *addr;
80 int nbio;
81 /* If 0, it means normal, if 1, do a connect on bind failure,
82 * and if there is no-one listening, bind with SO_REUSEADDR.
83 * If 2, always use SO_REUSEADDR. */
84 int bind_mode;
85 BIO *bio_chain;
86} BIO_ACCEPT;
87
88static int acpt_write(BIO *h, const char *buf, int num);
89static int acpt_read(BIO *h, char *buf, int size);
90static int acpt_puts(BIO *h, const char *str);
91static long acpt_ctrl(BIO *h, int cmd, long arg1, void *arg2);
92static int acpt_new(BIO *h);
93static int acpt_free(BIO *data);
94static int acpt_state(BIO *b, BIO_ACCEPT *c);
95static void acpt_close_socket(BIO *data);
96static BIO_ACCEPT *BIO_ACCEPT_new(void );
97static void BIO_ACCEPT_free(BIO_ACCEPT *a);
98
99#define ACPT_S_BEFORE 1
100#define ACPT_S_GET_ACCEPT_SOCKET 2
101#define ACPT_S_OK 3
102
103static BIO_METHOD methods_acceptp = {
104 .type = BIO_TYPE_ACCEPT,
105 .name = "socket accept",
106 .bwrite = acpt_write,
107 .bread = acpt_read,
108 .bputs = acpt_puts,
109 .ctrl = acpt_ctrl,
110 .create = acpt_new,
111 .destroy = acpt_free
112};
113
114BIO_METHOD *
115BIO_s_accept(void)
116{
117 return (&methods_acceptp);
118}
119
120static int
121acpt_new(BIO *bi)
122{
123 BIO_ACCEPT *ba;
124
125 bi->init = 0;
126 bi->num = -1;
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}
135
136static BIO_ACCEPT *
137BIO_ACCEPT_new(void)
138{
139 BIO_ACCEPT *ret;
140
141 if ((ret = calloc(1, sizeof(BIO_ACCEPT))) == NULL)
142 return (NULL);
143 ret->accept_sock = -1;
144 ret->bind_mode = BIO_BIND_NORMAL;
145 return (ret);
146}
147
148static void
149BIO_ACCEPT_free(BIO_ACCEPT *a)
150{
151 if (a == NULL)
152 return;
153
154 free(a->param_addr);
155 free(a->addr);
156 BIO_free(a->bio_chain);
157 free(a);
158}
159
160static void
161acpt_close_socket(BIO *bio)
162{
163 BIO_ACCEPT *c;
164
165 c = (BIO_ACCEPT *)bio->ptr;
166 if (c->accept_sock != -1) {
167 shutdown(c->accept_sock, SHUT_RDWR);
168 close(c->accept_sock);
169 c->accept_sock = -1;
170 bio->num = -1;
171 }
172}
173
174static int
175acpt_free(BIO *a)
176{
177 BIO_ACCEPT *data;
178
179 if (a == NULL)
180 return (0);
181 data = (BIO_ACCEPT *)a->ptr;
182
183 if (a->shutdown) {
184 acpt_close_socket(a);
185 BIO_ACCEPT_free(data);
186 a->ptr = NULL;
187 a->flags = 0;
188 a->init = 0;
189 }
190 return (1);
191}
192
193static int
194acpt_state(BIO *b, BIO_ACCEPT *c)
195{
196 BIO *bio = NULL, *dbio;
197 int s = -1;
198 int i;
199
200again:
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 == -1)
209 return (-1);
210
211 if (c->accept_nbio) {
212 if (!BIO_socket_nbio(s, 1)) {
213 close(s);
214 BIOerr(BIO_F_ACPT_STATE, BIO_R_ERROR_SETTING_NBIO_ON_ACCEPT_SOCKET);
215 return (-1);
216 }
217 }
218 c->accept_sock = s;
219 b->num = s;
220 c->state = ACPT_S_GET_ACCEPT_SOCKET;
221 return (1);
222 /* break; */
223 case ACPT_S_GET_ACCEPT_SOCKET:
224 if (b->next_bio != NULL) {
225 c->state = ACPT_S_OK;
226 goto again;
227 }
228 BIO_clear_retry_flags(b);
229 b->retry_reason = 0;
230 i = BIO_accept(c->accept_sock, &(c->addr));
231
232 /* -2 return means we should retry */
233 if (i == -2) {
234 BIO_set_retry_special(b);
235 b->retry_reason = BIO_RR_ACCEPT;
236 return -1;
237 }
238
239 if (i < 0)
240 return (i);
241
242 bio = BIO_new_socket(i, BIO_CLOSE);
243 if (bio == NULL)
244 goto err;
245
246 BIO_set_callback(bio, BIO_get_callback(b));
247 BIO_set_callback_arg(bio, BIO_get_callback_arg(b));
248
249 if (c->nbio) {
250 if (!BIO_socket_nbio(i, 1)) {
251 BIOerr(BIO_F_ACPT_STATE, BIO_R_ERROR_SETTING_NBIO_ON_ACCEPTED_SOCKET);
252 goto err;
253 }
254 }
255
256 /* If the accept BIO has an bio_chain, we dup it and
257 * put the new socket at the end. */
258 if (c->bio_chain != NULL) {
259 if ((dbio = BIO_dup_chain(c->bio_chain)) == NULL)
260 goto err;
261 if (!BIO_push(dbio, bio)) goto err;
262 bio = dbio;
263 }
264 if (BIO_push(b, bio)
265 == NULL) goto err;
266
267 c->state = ACPT_S_OK;
268 return (1);
269
270err:
271 if (bio != NULL)
272 BIO_free(bio);
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
288static int
289acpt_read(BIO *b, char *out, int outl)
290{
291 int ret = 0;
292 BIO_ACCEPT *data;
293
294 BIO_clear_retry_flags(b);
295 data = (BIO_ACCEPT *)b->ptr;
296
297 while (b->next_bio == NULL) {
298 ret = acpt_state(b, data);
299 if (ret <= 0)
300 return (ret);
301 }
302
303 ret = BIO_read(b->next_bio, out, outl);
304 BIO_copy_next_retry(b);
305 return (ret);
306}
307
308static int
309acpt_write(BIO *b, const char *in, int inl)
310{
311 int ret;
312 BIO_ACCEPT *data;
313
314 BIO_clear_retry_flags(b);
315 data = (BIO_ACCEPT *)b->ptr;
316
317 while (b->next_bio == NULL) {
318 ret = acpt_state(b, data);
319 if (ret <= 0)
320 return (ret);
321 }
322
323 ret = BIO_write(b->next_bio, in, inl);
324 BIO_copy_next_retry(b);
325 return (ret);
326}
327
328static long
329acpt_ctrl(BIO *b, int cmd, long num, void *ptr)
330{
331 int *ip;
332 long ret = 1;
333 BIO_ACCEPT *data;
334 char **pp;
335
336 data = (BIO_ACCEPT *)b->ptr;
337
338 switch (cmd) {
339 case BIO_CTRL_RESET:
340 ret = 0;
341 data->state = ACPT_S_BEFORE;
342 acpt_close_socket(b);
343 b->flags = 0;
344 break;
345 case BIO_C_DO_STATE_MACHINE:
346 /* use this one to start the connection */
347 ret = (long)acpt_state(b, data);
348 break;
349 case BIO_C_SET_ACCEPT:
350 if (ptr != NULL) {
351 if (num == 0) {
352 b->init = 1;
353 free(data->param_addr);
354 data->param_addr = strdup(ptr);
355 } else if (num == 1) {
356 data->accept_nbio = (ptr != NULL);
357 } else if (num == 2) {
358 BIO_free(data->bio_chain);
359 data->bio_chain = (BIO *)ptr;
360 }
361 }
362 break;
363 case BIO_C_SET_NBIO:
364 data->nbio = (int)num;
365 break;
366 case BIO_C_SET_FD:
367 b->init = 1;
368 b->num= *((int *)ptr);
369 data->accept_sock = b->num;
370 data->state = ACPT_S_GET_ACCEPT_SOCKET;
371 b->shutdown = (int)num;
372 b->init = 1;
373 break;
374 case BIO_C_GET_FD:
375 if (b->init) {
376 ip = (int *)ptr;
377 if (ip != NULL)
378 *ip = data->accept_sock;
379 ret = data->accept_sock;
380 } else
381 ret = -1;
382 break;
383 case BIO_C_GET_ACCEPT:
384 if (b->init) {
385 if (ptr != NULL) {
386 pp = (char **)ptr;
387 *pp = data->param_addr;
388 } else
389 ret = -1;
390 } else
391 ret = -1;
392 break;
393 case BIO_CTRL_GET_CLOSE:
394 ret = b->shutdown;
395 break;
396 case BIO_CTRL_SET_CLOSE:
397 b->shutdown = (int)num;
398 break;
399 case BIO_CTRL_PENDING:
400 case BIO_CTRL_WPENDING:
401 ret = 0;
402 break;
403 case BIO_CTRL_FLUSH:
404 break;
405 case BIO_C_SET_BIND_MODE:
406 data->bind_mode = (int)num;
407 break;
408 case BIO_C_GET_BIND_MODE:
409 ret = (long)data->bind_mode;
410 break;
411 case BIO_CTRL_DUP:
412/* dbio=(BIO *)ptr;
413 if (data->param_port) EAY EAY
414 BIO_set_port(dbio,data->param_port);
415 if (data->param_hostname)
416 BIO_set_hostname(dbio,data->param_hostname);
417 BIO_set_nbio(dbio,data->nbio);
418*/
419 break;
420
421 default:
422 ret = 0;
423 break;
424 }
425 return (ret);
426}
427
428static int
429acpt_puts(BIO *bp, const char *str)
430{
431 int n, ret;
432
433 n = strlen(str);
434 ret = acpt_write(bp, str, n);
435 return (ret);
436}
437
438BIO *
439BIO_new_accept(char *str)
440{
441 BIO *ret;
442
443 ret = BIO_new(BIO_s_accept());
444 if (ret == NULL)
445 return (NULL);
446 if (BIO_set_accept_port(ret, str))
447 return (ret);
448 else {
449 BIO_free(ret);
450 return (NULL);
451 }
452}
453
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