1 /* crypto/bio/bio_lib.c */
2 /* Copyright (C) 1995-1998 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.]
66 static STACK *bio_meth=NULL;
67 static int bio_meth_num=0;
74 ret=(BIO *)Malloc(sizeof(BIO));
77 BIOerr(BIO_F_BIO_NEW,ERR_R_MALLOC_FAILURE);
80 if (!BIO_set(ret,method))
88 int BIO_set(bio,method)
106 CRYPTO_new_ex_data(bio_meth,(char *)bio,&bio->ex_data);
107 if (method->create != NULL)
108 if (!method->create(bio))
118 if (a == NULL) return(0);
120 i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_BIO);
124 if (i > 0) return(1);
128 fprintf(stderr,"BIO_free, bad reference count\n");
132 if ((a->callback != NULL) &&
133 ((i=(int)a->callback(a,BIO_CB_FREE,NULL,0,0L,1L)) <= 0))
136 CRYPTO_free_ex_data(bio_meth,(char *)a,&a->ex_data);
138 if ((a->method == NULL) || (a->method->destroy == NULL)) return(1);
139 ret=a->method->destroy(a);
144 int BIO_read(b,out,outl)
152 if ((b == NULL) || (b->method == NULL) || (b->method->bread == NULL))
154 BIOerr(BIO_F_BIO_READ,BIO_R_UNSUPPORTED_METHOD);
160 ((i=(int)cb(b,BIO_CB_READ,out,outl,0L,1L)) <= 0))
165 BIOerr(BIO_F_BIO_READ,BIO_R_UNINITALISED);
169 i=b->method->bread(b,out,outl);
170 if (i > 0) b->num_read+=(unsigned long)i;
173 i=(int)cb(b,BIO_CB_READ|BIO_CB_RETURN,out,outl,
178 int BIO_write(b,in,inl)
190 if ((b->method == NULL) || (b->method->bwrite == NULL))
192 BIOerr(BIO_F_BIO_WRITE,BIO_R_UNSUPPORTED_METHOD);
197 ((i=(int)cb(b,BIO_CB_WRITE,in,inl,0L,1L)) <= 0))
202 BIOerr(BIO_F_BIO_WRITE,BIO_R_UNINITALISED);
206 i=b->method->bwrite(b,in,inl);
207 if (i > 0) b->num_write+=(unsigned long)i;
210 i=(int)cb(b,BIO_CB_WRITE|BIO_CB_RETURN,in,inl,
222 if ((b == NULL) || (b->method == NULL) || (b->method->bputs == NULL))
224 BIOerr(BIO_F_BIO_PUTS,BIO_R_UNSUPPORTED_METHOD);
231 ((i=(int)cb(b,BIO_CB_PUTS,in,0,0L,1L)) <= 0))
236 BIOerr(BIO_F_BIO_PUTS,BIO_R_UNINITALISED);
240 i=b->method->bputs(b,in);
243 i=(int)cb(b,BIO_CB_PUTS|BIO_CB_RETURN,in,0,
248 int BIO_gets(b,in,inl)
256 if ((b == NULL) || (b->method == NULL) || (b->method->bgets == NULL))
258 BIOerr(BIO_F_BIO_GETS,BIO_R_UNSUPPORTED_METHOD);
265 ((i=(int)cb(b,BIO_CB_GETS,in,inl,0L,1L)) <= 0))
270 BIOerr(BIO_F_BIO_GETS,BIO_R_UNINITALISED);
274 i=b->method->bgets(b,in,inl);
277 i=(int)cb(b,BIO_CB_GETS|BIO_CB_RETURN,in,inl,
282 long BIO_int_ctrl(b,cmd,larg,iarg)
291 return(BIO_ctrl(b,cmd,larg,(char *)&i));
294 char *BIO_ptr_ctrl(b,cmd,larg)
301 if (BIO_ctrl(b,cmd,larg,(char *)&p) <= 0)
307 long BIO_ctrl(b,cmd,larg,parg)
316 if (b == NULL) return(0);
318 if ((b->method == NULL) || (b->method->ctrl == NULL))
320 BIOerr(BIO_F_BIO_CTRL,BIO_R_UNSUPPORTED_METHOD);
327 ((ret=cb(b,BIO_CB_CTRL,parg,cmd,larg,1L)) <= 0))
330 ret=b->method->ctrl(b,cmd,larg,parg);
333 ret=cb(b,BIO_CB_CTRL|BIO_CB_RETURN,parg,cmd,
338 /* put the 'bio' on the end of b's list of operators */
344 if (b == NULL) return(bio);
346 while (lb->next_bio != NULL)
351 /* called to do internal processing */
352 BIO_ctrl(b,BIO_CTRL_PUSH,0,NULL);
356 /* Remove the first and return the rest */
362 if (b == NULL) return(NULL);
365 if (b->prev_bio != NULL)
366 b->prev_bio->next_bio=b->next_bio;
367 if (b->next_bio != NULL)
368 b->next_bio->prev_bio=b->prev_bio;
372 BIO_ctrl(b,BIO_CTRL_POP,0,NULL);
376 BIO *BIO_get_retry_BIO(bio,reason)
385 if (!BIO_should_retry(b)) break;
388 if (b == NULL) break;
390 if (reason != NULL) *reason=last->retry_reason;
394 int BIO_get_retry_reason(bio)
397 return(bio->retry_reason);
400 BIO *BIO_find_type(bio,type)
408 if (bio->method != NULL)
410 mt=bio->method->type;
414 if (mt & type) return(bio);
420 } while (bio != NULL);
424 void BIO_free_all(bio)
436 /* Since ref count > 1, don't free anyone else. */
441 BIO *BIO_dup_chain(in)
444 BIO *ret=NULL,*eoc=NULL,*bio,*new;
446 for (bio=in; bio != NULL; bio=bio->next_bio)
448 if ((new=BIO_new(bio->method)) == NULL) goto err;
449 new->callback=bio->callback;
450 new->cb_arg=bio->cb_arg;
452 new->shutdown=bio->shutdown;
453 new->flags=bio->flags;
455 /* This will let SSL_s_sock() work with stdin/stdout */
458 if (!BIO_dup_state(bio,(char *)new))
465 if (!CRYPTO_dup_ex_data(bio_meth,&new->ex_data,&bio->ex_data))
486 void BIO_copy_next_retry(b)
489 BIO_set_flags(b,BIO_get_retry_flags(b->next_bio));
490 b->retry_reason=b->next_bio->retry_reason;
493 int BIO_get_ex_new_index(argl,argp,new_func,dup_func,free_func)
501 return(CRYPTO_get_ex_new_index(bio_meth_num-1,&bio_meth,
502 argl,argp,new_func,dup_func,free_func));
505 int BIO_set_ex_data(bio,idx,data)
510 return(CRYPTO_set_ex_data(&(bio->ex_data),idx,data));
513 char *BIO_get_ex_data(bio,idx)
517 return(CRYPTO_get_ex_data(&(bio->ex_data),idx));