1 /* crypto/bio/bio_lib.c */
2 /* Copyright (C) 1995-1997 Eric Young (eay@cryptsoft.com)
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.
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).
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.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
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)"
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
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.]
69 ret=(BIO *)Malloc(sizeof(BIO));
72 BIOerr(BIO_F_BIO_NEW,ERR_R_MALLOC_FAILURE);
75 if (!BIO_set(ret,method))
83 int BIO_set(bio,method)
101 if (method->create != NULL)
102 if (!method->create(bio))
112 if (a == NULL) return(0);
114 i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_BIO);
116 if (i > 0) return(1);
120 fprintf(stderr,"BIO_free, bad reference count\n");
124 if ((a->callback != NULL) &&
125 ((i=(int)a->callback(a,BIO_CB_FREE,NULL,0,0L,1L)) <= 0))
128 if ((a->method == NULL) || (a->method->destroy == NULL)) return(1);
129 ret=a->method->destroy(a);
134 int BIO_read(b,out,outl)
141 if ((b == NULL) || (b->method == NULL) || (b->method->bread == NULL))
143 BIOerr(BIO_F_BIO_READ,BIO_R_UNSUPPORTED_METHOD);
147 if ((b->callback != NULL) &&
148 ((i=(int)b->callback(b,BIO_CB_READ,out,outl,0L,1L)) <= 0))
153 BIOerr(BIO_F_BIO_READ,BIO_R_UNINITALISED);
157 i=b->method->bread(b,out,outl);
158 if (i > 0) b->num_read+=(unsigned long)i;
160 if (b->callback != NULL)
161 i=(int)b->callback(b,BIO_CB_READ|BIO_CB_RETURN,out,outl,
166 int BIO_write(b,in,inl)
173 if ((b == NULL) || (b->method == NULL) || (b->method->bwrite == NULL))
175 BIOerr(BIO_F_BIO_WRITE,BIO_R_UNSUPPORTED_METHOD);
179 if ((b->callback != NULL) &&
180 ((i=(int)b->callback(b,BIO_CB_WRITE,in,inl,0L,1L)) <= 0))
185 BIOerr(BIO_F_BIO_WRITE,BIO_R_UNINITALISED);
189 i=b->method->bwrite(b,in,inl);
190 if (i > 0) b->num_write+=(unsigned long)i;
192 if (b->callback != NULL)
193 i=(int)b->callback(b,BIO_CB_WRITE|BIO_CB_RETURN,in,inl,
204 if ((b == NULL) || (b->method == NULL) || (b->method->bputs == NULL))
206 BIOerr(BIO_F_BIO_PUTS,BIO_R_UNSUPPORTED_METHOD);
210 if ((b->callback != NULL) &&
211 ((i=(int)b->callback(b,BIO_CB_PUTS,in,0,0L,1L)) <= 0))
216 BIOerr(BIO_F_BIO_PUTS,BIO_R_UNINITALISED);
220 i=b->method->bputs(b,in);
222 if (b->callback != NULL)
223 i=(int)b->callback(b,BIO_CB_PUTS|BIO_CB_RETURN,in,0,
228 int BIO_gets(b,in,inl)
235 if ((b == NULL) || (b->method == NULL) || (b->method->bgets == NULL))
237 BIOerr(BIO_F_BIO_GETS,BIO_R_UNSUPPORTED_METHOD);
241 if ((b->callback != NULL) &&
242 ((i=(int)b->callback(b,BIO_CB_GETS,in,inl,0L,1L)) <= 0))
247 BIOerr(BIO_F_BIO_GETS,BIO_R_UNINITALISED);
251 i=b->method->bgets(b,in,inl);
253 if (b->callback != NULL)
254 i=(int)b->callback(b,BIO_CB_GETS|BIO_CB_RETURN,in,inl,
259 long BIO_ctrl_int(b,cmd,larg,iarg)
268 return(BIO_ctrl(b,cmd,larg,(char *)&i));
271 long BIO_ctrl(b,cmd,larg,parg)
279 if (b == NULL) return(0);
281 if ((b->method == NULL) || (b->method->ctrl == NULL))
283 BIOerr(BIO_F_BIO_CTRL,BIO_R_UNSUPPORTED_METHOD);
287 if ((b->callback != NULL) &&
288 ((ret=b->callback(b,BIO_CB_CTRL,parg,cmd,larg,1L)) <= 0))
291 ret=b->method->ctrl(b,cmd,larg,parg);
293 if (b->callback != NULL)
294 ret=b->callback(b,BIO_CB_CTRL|BIO_CB_RETURN,parg,cmd,
299 /* put the 'bio' on the end of b's list of operators */
305 if (b == NULL) return(bio);
307 while (lb->next_bio != NULL)
312 BIO_ctrl(b,BIO_CTRL_PUSH,0,NULL);
316 /* Remove the first and return the rest */
322 if (b == NULL) return(NULL);
325 if (b->prev_bio != NULL)
326 b->prev_bio->next_bio=b->next_bio;
327 if (b->next_bio != NULL)
328 b->next_bio->prev_bio=b->prev_bio;
332 BIO_ctrl(b,BIO_CTRL_POP,0,NULL);
336 BIO *BIO_get_retry_BIO(bio,reason)
345 if (!BIO_should_retry(b)) break;
348 if (b == NULL) break;
350 if (reason != NULL) *reason=last->retry_reason;
354 int BIO_get_retry_reason(bio)
357 return(bio->retry_reason);
360 BIO *BIO_find_type(bio,type)
368 if (bio->method != NULL)
370 mt=bio->method->type;
374 if (mt & type) return(bio);
380 } while (bio != NULL);
384 void BIO_free_all(bio)
396 /* Since ref count > 1, don't free anyone else. */
401 BIO *BIO_dup_chain(in)
404 BIO *ret=NULL,*eoc=NULL,*bio,*new;
406 for (bio=in; bio != NULL; bio=bio->next_bio)
408 if ((new=BIO_new(bio->method)) == NULL) goto err;
409 new->callback=bio->callback;
410 new->cb_arg=bio->cb_arg;
412 new->shutdown=bio->shutdown;
413 new->flags=bio->flags;
415 /* This will let SSL_s_sock() work with stdin/stdout */
418 if (!BIO_dup_state(bio,(char *)new))
441 void BIO_copy_next_retry(b)
444 BIO_set_flags(b,BIO_get_retry_flags(b->next_bio));
445 b->retry_reason=b->next_bio->retry_reason;