1 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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.
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).
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.
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
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 :-).
36 * 4. If you include any Windows specific code (or a derivative thereof) from
37 * the apps directory (application code) you must include an acknowledgement:
38 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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
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.]
61 #include "internal/cryptlib.h"
62 #include <openssl/bio.h>
64 #ifndef OPENSSL_NO_SOCK
66 # if (defined(OPENSSL_SYS_VMS) && __VMS_VER < 70000000)
67 /* FIONBIO used as a switch to enable ioctl, and that isn't in VMS < 7.0 */
71 typedef struct bio_accept_st {
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
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);
91 static int acpt_new(BIO *h);
92 static int acpt_free(BIO *data);
93 static int acpt_state(BIO *b, BIO_ACCEPT *c);
94 static void acpt_close_socket(BIO *data);
95 static BIO_ACCEPT *BIO_ACCEPT_new(void);
96 static void BIO_ACCEPT_free(BIO_ACCEPT *a);
98 # define ACPT_S_BEFORE 1
99 # define ACPT_S_GET_ACCEPT_SOCKET 2
102 static BIO_METHOD methods_acceptp = {
108 NULL, /* connect_gets, */
115 BIO_METHOD *BIO_s_accept(void)
117 return (&methods_acceptp);
120 static int acpt_new(BIO *bi)
125 bi->num = (int)INVALID_SOCKET;
127 if ((ba = BIO_ACCEPT_new()) == NULL)
129 bi->ptr = (char *)ba;
130 ba->state = ACPT_S_BEFORE;
135 static BIO_ACCEPT *BIO_ACCEPT_new(void)
139 if ((ret = OPENSSL_zalloc(sizeof(*ret))) == NULL)
141 ret->accept_sock = (int)INVALID_SOCKET;
142 ret->bind_mode = BIO_BIND_NORMAL;
146 static void BIO_ACCEPT_free(BIO_ACCEPT *a)
151 OPENSSL_free(a->param_addr);
152 OPENSSL_free(a->addr);
153 BIO_free(a->bio_chain);
157 static void acpt_close_socket(BIO *bio)
161 c = (BIO_ACCEPT *)bio->ptr;
162 if (c->accept_sock != (int)INVALID_SOCKET) {
163 shutdown(c->accept_sock, 2);
164 closesocket(c->accept_sock);
165 c->accept_sock = (int)INVALID_SOCKET;
166 bio->num = (int)INVALID_SOCKET;
170 static int acpt_free(BIO *a)
176 data = (BIO_ACCEPT *)a->ptr;
179 acpt_close_socket(a);
180 BIO_ACCEPT_free(data);
188 static int acpt_state(BIO *b, BIO_ACCEPT *c)
190 BIO *bio = NULL, *dbio;
197 if (c->param_addr == NULL) {
198 BIOerr(BIO_F_ACPT_STATE, BIO_R_NO_ACCEPT_PORT_SPECIFIED);
201 s = BIO_get_accept_socket(c->param_addr, c->bind_mode);
202 if (s == (int)INVALID_SOCKET)
205 if (c->accept_nbio) {
206 if (!BIO_socket_nbio(s, 1)) {
208 BIOerr(BIO_F_ACPT_STATE,
209 BIO_R_ERROR_SETTING_NBIO_ON_ACCEPT_SOCKET);
215 c->state = ACPT_S_GET_ACCEPT_SOCKET;
218 case ACPT_S_GET_ACCEPT_SOCKET:
219 if (b->next_bio != NULL) {
220 c->state = ACPT_S_OK;
223 BIO_clear_retry_flags(b);
225 i = BIO_accept(c->accept_sock, &(c->addr));
227 /* -2 return means we should retry */
229 BIO_set_retry_special(b);
230 b->retry_reason = BIO_RR_ACCEPT;
237 bio = BIO_new_socket(i, BIO_CLOSE);
241 BIO_set_callback(bio, BIO_get_callback(b));
242 BIO_set_callback_arg(bio, BIO_get_callback_arg(b));
245 if (!BIO_socket_nbio(i, 1)) {
246 BIOerr(BIO_F_ACPT_STATE,
247 BIO_R_ERROR_SETTING_NBIO_ON_ACCEPTED_SOCKET);
253 * If the accept BIO has an bio_chain, we dup it and put the new
256 if (c->bio_chain != NULL) {
257 if ((dbio = BIO_dup_chain(c->bio_chain)) == NULL)
259 if (!BIO_push(dbio, bio))
263 if (BIO_push(b, bio) == NULL)
266 c->state = ACPT_S_OK;
276 if (b->next_bio == NULL) {
277 c->state = ACPT_S_GET_ACCEPT_SOCKET;
289 static int acpt_read(BIO *b, char *out, int outl)
294 BIO_clear_retry_flags(b);
295 data = (BIO_ACCEPT *)b->ptr;
297 while (b->next_bio == NULL) {
298 ret = acpt_state(b, data);
303 ret = BIO_read(b->next_bio, out, outl);
304 BIO_copy_next_retry(b);
308 static int acpt_write(BIO *b, const char *in, int inl)
313 BIO_clear_retry_flags(b);
314 data = (BIO_ACCEPT *)b->ptr;
316 while (b->next_bio == NULL) {
317 ret = acpt_state(b, data);
322 ret = BIO_write(b->next_bio, in, inl);
323 BIO_copy_next_retry(b);
327 static long acpt_ctrl(BIO *b, int cmd, long num, void *ptr)
334 data = (BIO_ACCEPT *)b->ptr;
339 data->state = ACPT_S_BEFORE;
340 acpt_close_socket(b);
343 case BIO_C_DO_STATE_MACHINE:
344 /* use this one to start the connection */
345 ret = (long)acpt_state(b, data);
347 case BIO_C_SET_ACCEPT:
351 OPENSSL_free(data->param_addr);
352 data->param_addr = OPENSSL_strdup(ptr);
353 } else if (num == 1) {
354 data->accept_nbio = (ptr != NULL);
355 } else if (num == 2) {
356 BIO_free(data->bio_chain);
357 data->bio_chain = (BIO *)ptr;
362 data->nbio = (int)num;
366 b->num = *((int *)ptr);
367 data->accept_sock = b->num;
368 data->state = ACPT_S_GET_ACCEPT_SOCKET;
369 b->shutdown = (int)num;
376 *ip = data->accept_sock;
377 ret = data->accept_sock;
381 case BIO_C_GET_ACCEPT:
385 *pp = data->param_addr;
391 case BIO_CTRL_GET_CLOSE:
394 case BIO_CTRL_SET_CLOSE:
395 b->shutdown = (int)num;
397 case BIO_CTRL_PENDING:
398 case BIO_CTRL_WPENDING:
403 case BIO_C_SET_BIND_MODE:
404 data->bind_mode = (int)num;
406 case BIO_C_GET_BIND_MODE:
407 ret = (long)data->bind_mode;
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); */
425 static int acpt_puts(BIO *bp, const char *str)
430 ret = acpt_write(bp, str, n);
434 BIO *BIO_new_accept(const char *str)
438 ret = BIO_new(BIO_s_accept());
441 if (BIO_set_accept_port(ret, str))