GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libcrypto/bio/bss_acpt.c Lines: 91 176 51.7 %
Date: 2017-11-07 Branches: 31 92 33.7 %

Line Branch Exec Source
1
/* $OpenBSD: bss_acpt.c,v 1.27 2017/01/29 17:49:22 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
72
typedef 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
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);
92
static int acpt_new(BIO *h);
93
static int acpt_free(BIO *data);
94
static int acpt_state(BIO *b, BIO_ACCEPT *c);
95
static void acpt_close_socket(BIO *data);
96
static BIO_ACCEPT *BIO_ACCEPT_new(void );
97
static 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
103
static 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
114
BIO_METHOD *
115
BIO_s_accept(void)
116
{
117
4
	return (&methods_acceptp);
118
}
119
120
static int
121
acpt_new(BIO *bi)
122
{
123
	BIO_ACCEPT *ba;
124
125
4
	bi->init = 0;
126
2
	bi->num = -1;
127
2
	bi->flags = 0;
128
2
	if ((ba = BIO_ACCEPT_new()) == NULL)
129
		return (0);
130
2
	bi->ptr = (char *)ba;
131
2
	ba->state = ACPT_S_BEFORE;
132
2
	bi->shutdown = 1;
133
2
	return (1);
134
2
}
135
136
static BIO_ACCEPT *
137
BIO_ACCEPT_new(void)
138
{
139
	BIO_ACCEPT *ret;
140
141
4
	if ((ret = calloc(1, sizeof(BIO_ACCEPT))) == NULL)
142
		return (NULL);
143
2
	ret->accept_sock = -1;
144
2
	ret->bind_mode = BIO_BIND_NORMAL;
145
2
	return (ret);
146
2
}
147
148
static void
149
BIO_ACCEPT_free(BIO_ACCEPT *a)
150
{
151
4
	if (a == NULL)
152
		return;
153
154
2
	free(a->param_addr);
155
2
	free(a->addr);
156
2
	BIO_free(a->bio_chain);
157
2
	free(a);
158
4
}
159
160
static void
161
acpt_close_socket(BIO *bio)
162
{
163
	BIO_ACCEPT *c;
164
165
4
	c = (BIO_ACCEPT *)bio->ptr;
166
2
	if (c->accept_sock != -1) {
167
2
		shutdown(c->accept_sock, SHUT_RDWR);
168
2
		close(c->accept_sock);
169
2
		c->accept_sock = -1;
170
2
		bio->num = -1;
171
2
	}
172
2
}
173
174
static int
175
acpt_free(BIO *a)
176
{
177
	BIO_ACCEPT *data;
178
179
4
	if (a == NULL)
180
		return (0);
181
2
	data = (BIO_ACCEPT *)a->ptr;
182
183
2
	if (a->shutdown) {
184
2
		acpt_close_socket(a);
185
2
		BIO_ACCEPT_free(data);
186
2
		a->ptr = NULL;
187
2
		a->flags = 0;
188
2
		a->init = 0;
189
2
	}
190
2
	return (1);
191
2
}
192
193
static int
194
acpt_state(BIO *b, BIO_ACCEPT *c)
195
{
196
	BIO *bio = NULL, *dbio;
197
	int s = -1;
198
8
	int i;
199
200
again:
201

4
	switch (c->state) {
202
	case ACPT_S_BEFORE:
203
2
		if (c->param_addr == NULL) {
204
			BIOerror(BIO_R_NO_ACCEPT_PORT_SPECIFIED);
205
			return (-1);
206
		}
207
2
		s = BIO_get_accept_socket(c->param_addr, c->bind_mode);
208
2
		if (s == -1)
209
			return (-1);
210
211
2
		if (c->accept_nbio) {
212
			if (!BIO_socket_nbio(s, 1)) {
213
				close(s);
214
				BIOerror(BIO_R_ERROR_SETTING_NBIO_ON_ACCEPT_SOCKET);
215
				return (-1);
216
			}
217
		}
218
2
		c->accept_sock = s;
219
2
		b->num = s;
220
2
		c->state = ACPT_S_GET_ACCEPT_SOCKET;
221
2
		return (1);
222
		/* break; */
223
	case ACPT_S_GET_ACCEPT_SOCKET:
224
2
		if (b->next_bio != NULL) {
225
			c->state = ACPT_S_OK;
226
			goto again;
227
		}
228
2
		BIO_clear_retry_flags(b);
229
2
		b->retry_reason = 0;
230
2
		i = BIO_accept(c->accept_sock, &(c->addr));
231
232
		/* -2 return means we should retry */
233
2
		if (i == -2) {
234
			BIO_set_retry_special(b);
235
			b->retry_reason = BIO_RR_ACCEPT;
236
			return -1;
237
		}
238
239
2
		if (i < 0)
240
			return (i);
241
242
2
		bio = BIO_new_socket(i, BIO_CLOSE);
243
2
		if (bio == NULL)
244
			goto err;
245
246
2
		BIO_set_callback(bio, BIO_get_callback(b));
247
2
		BIO_set_callback_arg(bio, BIO_get_callback_arg(b));
248
249
2
		if (c->nbio) {
250
			if (!BIO_socket_nbio(i, 1)) {
251
				BIOerror(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
2
		if (c->bio_chain != NULL) {
259
2
			if ((dbio = BIO_dup_chain(c->bio_chain)) == NULL)
260
				goto err;
261
2
			if (!BIO_push(dbio, bio)) goto err;
262
				bio = dbio;
263
2
		}
264
4
		if (BIO_push(b, bio)
265
2
			== NULL) goto err;
266
267
2
		c->state = ACPT_S_OK;
268
2
		return (1);
269
270
err:
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
4
}
287
288
static int
289
acpt_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
308
static int
309
acpt_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
328
static long
329
acpt_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
36
	data = (BIO_ACCEPT *)b->ptr;
337
338




24
	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
4
		ret = (long)acpt_state(b, data);
348
4
		break;
349
	case BIO_C_SET_ACCEPT:
350
4
		if (ptr != NULL) {
351
4
			if (num == 0) {
352
2
				b->init = 1;
353
2
				free(data->param_addr);
354
2
				data->param_addr = strdup(ptr);
355
4
			} else if (num == 1) {
356
				data->accept_nbio = (ptr != NULL);
357
2
			} else if (num == 2) {
358
2
				BIO_free(data->bio_chain);
359
2
				data->bio_chain = (BIO *)ptr;
360
2
			}
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
4
		break;
424
	}
425
12
	return (ret);
426
}
427
428
static int
429
acpt_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
438
BIO *
439
BIO_new_accept(char *str)
440
{
441
	BIO *ret;
442
443
4
	ret = BIO_new(BIO_s_accept());
444
2
	if (ret == NULL)
445
		return (NULL);
446
2
	if (BIO_set_accept_port(ret, str))
447
2
		return (ret);
448
	else {
449
		BIO_free(ret);
450
		return (NULL);
451
	}
452
2
}
453