]>
git.ipfire.org Git - thirdparty/openssl.git/blob - crypto/bio/bio_lib.c
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
;