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bss_acpt.c

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1/* $OpenBSD: bss_acpt.c,v 1.29 2018/05/12 18:51:59 tb 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 const 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-
114const BIO_METHOD *-
115BIO_s_accept(void)-
116{-
117 return (&methods_acceptp);
never executed: return (&methods_acceptp);
0
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)
(ba = BIO_ACCE...== ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
129 return (0);
never executed: return (0);
0
130 bi->ptr = (char *)ba;-
131 ba->state = ACPT_S_BEFORE;-
132 bi->shutdown = 1;-
133 return (1);
never executed: return (1);
0
134}-
135-
136static BIO_ACCEPT *-
137BIO_ACCEPT_new(void)-
138{-
139 BIO_ACCEPT *ret;-
140-
141 if ((ret = calloc(1, sizeof(BIO_ACCEPT))) == NULL)
(ret = calloc(...== ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
142 return (NULL);
never executed: return ( ((void *)0) );
0
143 ret->accept_sock = -1;-
144 ret->bind_mode = BIO_BIND_NORMAL;-
145 return (ret);
never executed: return (ret);
0
146}-
147-
148static void-
149BIO_ACCEPT_free(BIO_ACCEPT *a)-
150{-
151 if (a == NULL)
a == ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
152 return;
never executed: return;
0
153-
154 free(a->param_addr);-
155 free(a->addr);-
156 BIO_free(a->bio_chain);-
157 free(a);-
158}
never executed: end of block
0
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) {
c->accept_sock != -1Description
TRUEnever evaluated
FALSEnever evaluated
0
167 shutdown(c->accept_sock, SHUT_RDWR);-
168 close(c->accept_sock);-
169 c->accept_sock = -1;-
170 bio->num = -1;-
171 }
never executed: end of block
0
172}
never executed: end of block
0
173-
174static int-
175acpt_free(BIO *a)-
176{-
177 BIO_ACCEPT *data;-
178-
179 if (a == NULL)
a == ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
180 return (0);
never executed: return (0);
0
181 data = (BIO_ACCEPT *)a->ptr;-
182-
183 if (a->shutdown) {
a->shutdownDescription
TRUEnever evaluated
FALSEnever evaluated
0
184 acpt_close_socket(a);-
185 BIO_ACCEPT_free(data);-
186 a->ptr = NULL;-
187 a->flags = 0;-
188 a->init = 0;-
189 }
never executed: end of block
0
190 return (1);
never executed: return (1);
0
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:
code before this statement never executed: again:
0
201 switch (c->state) {-
202 case ACPT_S_BEFORE:
never executed: case 1:
0
203 if (c->param_addr == NULL) {
c->param_addr == ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
204 BIOerror(BIO_R_NO_ACCEPT_PORT_SPECIFIED);-
205 return (-1);
never executed: return (-1);
0
206 }-
207 s = BIO_get_accept_socket(c->param_addr, c->bind_mode);-
208 if (s == -1)
s == -1Description
TRUEnever evaluated
FALSEnever evaluated
0
209 return (-1);
never executed: return (-1);
0
210-
211 if (c->accept_nbio) {
c->accept_nbioDescription
TRUEnever evaluated
FALSEnever evaluated
0
212 if (!BIO_socket_nbio(s, 1)) {
!BIO_socket_nbio(s, 1)Description
TRUEnever evaluated
FALSEnever evaluated
0
213 close(s);-
214 BIOerror(BIO_R_ERROR_SETTING_NBIO_ON_ACCEPT_SOCKET);-
215 return (-1);
never executed: return (-1);
0
216 }-
217 }
never executed: end of block
0
218 c->accept_sock = s;-
219 b->num = s;-
220 c->state = ACPT_S_GET_ACCEPT_SOCKET;-
221 return (1);
never executed: return (1);
0
222 /* break; */-
223 case ACPT_S_GET_ACCEPT_SOCKET:
never executed: case 2:
0
224 if (b->next_bio != NULL) {
b->next_bio != ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
225 c->state = ACPT_S_OK;-
226 goto again;
never executed: goto again;
0
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) {
i == -2Description
TRUEnever evaluated
FALSEnever evaluated
0
234 BIO_set_retry_special(b);-
235 b->retry_reason = BIO_RR_ACCEPT;-
236 return -1;
never executed: return -1;
0
237 }-
238-
239 if (i < 0)
i < 0Description
TRUEnever evaluated
FALSEnever evaluated
0
240 return (i);
never executed: return (i);
0
241-
242 bio = BIO_new_socket(i, BIO_CLOSE);-
243 if (bio == NULL)
bio == ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
244 goto err;
never executed: goto err;
0
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) {
c->nbioDescription
TRUEnever evaluated
FALSEnever evaluated
0
250 if (!BIO_socket_nbio(i, 1)) {
!BIO_socket_nbio(i, 1)Description
TRUEnever evaluated
FALSEnever evaluated
0
251 BIOerror(BIO_R_ERROR_SETTING_NBIO_ON_ACCEPTED_SOCKET);-
252 goto err;
never executed: goto err;
0
253 }-
254 }
never executed: end of block
0
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) {
c->bio_chain != ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
259 if ((dbio = BIO_dup_chain(c->bio_chain)) == NULL)
(dbio = BIO_du...== ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
260 goto err;
never executed: goto err;
0
261 if (!BIO_push(dbio, bio)) goto err;
never executed: goto err;
!BIO_push(dbio, bio)Description
TRUEnever evaluated
FALSEnever evaluated
0
262 bio = dbio;-
263 }
never executed: end of block
0
264 if (BIO_push(b, bio)
BIO_push(b, bi...== ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
265 == NULL) goto err;
never executed: goto err;
BIO_push(b, bi...== ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
266-
267 c->state = ACPT_S_OK;-
268 return (1);
never executed: return (1);
0
269-
270err:-
271 if (bio != NULL)
bio != ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
272 BIO_free(bio);
never executed: BIO_free(bio);
0
273 return (0);
never executed: return (0);
0
274 /* break; */-
275 case ACPT_S_OK:
never executed: case 3:
0
276 if (b->next_bio == NULL) {
b->next_bio == ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
277 c->state = ACPT_S_GET_ACCEPT_SOCKET;-
278 goto again;
never executed: goto again;
0
279 }-
280 return (1);
never executed: return (1);
0
281 /* break; */-
282 default:
never executed: default:
0
283 return (0);
never executed: return (0);
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) {
b->next_bio == ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
298 ret = acpt_state(b, data);-
299 if (ret <= 0)
ret <= 0Description
TRUEnever evaluated
FALSEnever evaluated
0
300 return (ret);
never executed: return (ret);
0
301 }
never executed: end of block
0
302-
303 ret = BIO_read(b->next_bio, out, outl);-
304 BIO_copy_next_retry(b);-
305 return (ret);
never executed: return (ret);
0
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) {
b->next_bio == ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
318 ret = acpt_state(b, data);-
319 if (ret <= 0)
ret <= 0Description
TRUEnever evaluated
FALSEnever evaluated
0
320 return (ret);
never executed: return (ret);
0
321 }
never executed: end of block
0
322-
323 ret = BIO_write(b->next_bio, in, inl);-
324 BIO_copy_next_retry(b);-
325 return (ret);
never executed: return (ret);
0
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:
never executed: case 1:
0
340 ret = 0;-
341 data->state = ACPT_S_BEFORE;-
342 acpt_close_socket(b);-
343 b->flags = 0;-
344 break;
never executed: break;
0
345 case BIO_C_DO_STATE_MACHINE:
never executed: case 101:
0
346 /* use this one to start the connection */-
347 ret = (long)acpt_state(b, data);-
348 break;
never executed: break;
0
349 case BIO_C_SET_ACCEPT:
never executed: case 118:
0
350 if (ptr != NULL) {
ptr != ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
351 if (num == 0) {
num == 0Description
TRUEnever evaluated
FALSEnever evaluated
0
352 b->init = 1;-
353 free(data->param_addr);-
354 data->param_addr = strdup(ptr);
never executed: __retval = (char *) memcpy (__retval, ptr , __len);
__retval != ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
((const char *... ))[0] == '\0'Description
TRUEnever evaluated
FALSEnever evaluated
__builtin_constant_p ( ptr )Description
TRUEnever evaluated
FALSEnever evaluated
((size_t)(cons...)( ptr ) == 1)Description
TRUEnever evaluated
FALSEnever evaluated
0
355 } else if (num == 1) {
never executed: end of block
num == 1Description
TRUEnever evaluated
FALSEnever evaluated
0
356 data->accept_nbio = (ptr != NULL);-
357 } else if (num == 2) {
never executed: end of block
num == 2Description
TRUEnever evaluated
FALSEnever evaluated
0
358 BIO_free(data->bio_chain);-
359 data->bio_chain = (BIO *)ptr;-
360 }
never executed: end of block
0
361 }
never executed: end of block
0
362 break;
never executed: break;
0
363 case BIO_C_SET_NBIO:
never executed: case 102:
0
364 data->nbio = (int)num;-
365 break;
never executed: break;
0
366 case BIO_C_SET_FD:
never executed: case 104:
0
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;
never executed: break;
0
374 case BIO_C_GET_FD:
never executed: case 105:
0
375 if (b->init) {
b->initDescription
TRUEnever evaluated
FALSEnever evaluated
0
376 ip = (int *)ptr;-
377 if (ip != NULL)
ip != ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
378 *ip = data->accept_sock;
never executed: *ip = data->accept_sock;
0
379 ret = data->accept_sock;-
380 } else
never executed: end of block
0
381 ret = -1;
never executed: ret = -1;
0
382 break;
never executed: break;
0
383 case BIO_C_GET_ACCEPT:
never executed: case 124:
0
384 if (b->init) {
b->initDescription
TRUEnever evaluated
FALSEnever evaluated
0
385 if (ptr != NULL) {
ptr != ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
386 pp = (char **)ptr;-
387 *pp = data->param_addr;-
388 } else
never executed: end of block
0
389 ret = -1;
never executed: ret = -1;
0
390 } else-
391 ret = -1;
never executed: ret = -1;
0
392 break;
never executed: break;
0
393 case BIO_CTRL_GET_CLOSE:
never executed: case 8:
0
394 ret = b->shutdown;-
395 break;
never executed: break;
0
396 case BIO_CTRL_SET_CLOSE:
never executed: case 9:
0
397 b->shutdown = (int)num;-
398 break;
never executed: break;
0
399 case BIO_CTRL_PENDING:
never executed: case 10:
0
400 case BIO_CTRL_WPENDING:
never executed: case 13:
0
401 ret = 0;-
402 break;
never executed: break;
0
403 case BIO_CTRL_FLUSH:
never executed: case 11:
0
404 break;
never executed: break;
0
405 case BIO_C_SET_BIND_MODE:
never executed: case 131:
0
406 data->bind_mode = (int)num;-
407 break;
never executed: break;
0
408 case BIO_C_GET_BIND_MODE:
never executed: case 132:
0
409 ret = (long)data->bind_mode;-
410 break;
never executed: break;
0
411 case BIO_CTRL_DUP:
never executed: case 12:
0
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;
never executed: break;
0
420-
421 default:
never executed: default:
0
422 ret = 0;-
423 break;
never executed: break;
0
424 }-
425 return (ret);
never executed: return (ret);
0
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);
never executed: return (ret);
0
436}-
437-
438BIO *-
439BIO_new_accept(const char *str)-
440{-
441 BIO *ret;-
442-
443 ret = BIO_new(BIO_s_accept());-
444 if (ret == NULL)
ret == ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
445 return (NULL);
never executed: return ( ((void *)0) );
0
446 if (BIO_set_accept_port(ret, str))
BIO_ctrl(ret,1...0,(char *)str)Description
TRUEnever evaluated
FALSEnever evaluated
0
447 return (ret);
never executed: return (ret);
0
448 else {-
449 BIO_free(ret);-
450 return (NULL);
never executed: return ( ((void *)0) );
0
451 }-
452}-
453-
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