X-Git-Url: https://git.openssl.org/gitweb/?p=openssl.git;a=blobdiff_plain;f=crypto%2Fbio%2Fbio_lib.c;h=a5d8680d4802c4ab7162be41fa78ef9f5534bf8d;hp=dcc989f9d6bfb930ec667f87855fcf7bc67006db;hb=ca3a82c3b364e1e584546f0f3bbb938b0b472580;hpb=aa4ce7315f65fdf8940d5bc9e562aa478f0335d3

diff --git a/crypto/bio/bio_lib.c b/crypto/bio/bio_lib.c
index dcc989f9d6..a5d8680d48 100644
--- a/crypto/bio/bio_lib.c
+++ b/crypto/bio/bio_lib.c
@@ -5,21 +5,21 @@
  * This package is an SSL implementation written
  * by Eric Young (eay@cryptsoft.com).
  * The implementation was written so as to conform with Netscapes SSL.
- * 
+ *
  * This library is free for commercial and non-commercial use as long as
  * the following conditions are aheared to.  The following conditions
  * apply to all code found in this distribution, be it the RC4, RSA,
  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  * included with this distribution is covered by the same copyright terms
  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
- * 
+ *
  * Copyright remains Eric Young's, and as such any Copyright notices in
  * the code are not to be removed.
  * If this package is used in a product, Eric Young should be given attribution
  * as the author of the parts of the library used.
  * This can be in the form of a textual message at program startup or
  * in documentation (online or textual) provided with the package.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
@@ -34,10 +34,10 @@
  *     Eric Young (eay@cryptsoft.com)"
  *    The word 'cryptographic' can be left out if the rouines from the library
  *    being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from 
+ * 4. If you include any Windows specific code (or a derivative thereof) from
  *    the apps directory (application code) you must include an acknowledgement:
  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- * 
+ *
  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
@@ -49,7 +49,7 @@
  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
- * 
+ *
  * The licence and distribution terms for any publically available version or
  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  * copied and put under another distribution licence
@@ -64,493 +64,528 @@
 #include <openssl/stack.h>
 
 BIO *BIO_new(BIO_METHOD *method)
-	{
-	BIO *ret=NULL;
-
-	ret=(BIO *)OPENSSL_malloc(sizeof(BIO));
-	if (ret == NULL)
-		{
-		BIOerr(BIO_F_BIO_NEW,ERR_R_MALLOC_FAILURE);
-		return(NULL);
-		}
-	if (!BIO_set(ret,method))
-		{
-		OPENSSL_free(ret);
-		ret=NULL;
-		}
-	return(ret);
-	}
+{
+    BIO *ret = NULL;
+
+    ret = (BIO *)OPENSSL_malloc(sizeof(BIO));
+    if (ret == NULL) {
+        BIOerr(BIO_F_BIO_NEW, ERR_R_MALLOC_FAILURE);
+        return (NULL);
+    }
+    if (!BIO_set(ret, method)) {
+        OPENSSL_free(ret);
+        ret = NULL;
+    }
+    return (ret);
+}
 
 int BIO_set(BIO *bio, BIO_METHOD *method)
-	{
-	bio->method=method;
-	bio->callback=NULL;
-	bio->cb_arg=NULL;
-	bio->init=0;
-	bio->shutdown=1;
-	bio->flags=0;
-	bio->retry_reason=0;
-	bio->num=0;
-	bio->ptr=NULL;
-	bio->prev_bio=NULL;
-	bio->next_bio=NULL;
-	bio->references=1;
-	bio->num_read=0L;
-	bio->num_write=0L;
-	CRYPTO_new_ex_data(CRYPTO_EX_INDEX_BIO, bio, &bio->ex_data);
-	if (method->create != NULL)
-		if (!method->create(bio))
-			{
-			CRYPTO_free_ex_data(CRYPTO_EX_INDEX_BIO, bio,
-					&bio->ex_data);
-			return(0);
-			}
-	return(1);
-	}
+{
+    bio->method = method;
+    bio->callback = NULL;
+    bio->cb_arg = NULL;
+    bio->init = 0;
+    bio->shutdown = 1;
+    bio->flags = 0;
+    bio->retry_reason = 0;
+    bio->num = 0;
+    bio->ptr = NULL;
+    bio->prev_bio = NULL;
+    bio->next_bio = NULL;
+    bio->references = 1;
+    bio->num_read = 0L;
+    bio->num_write = 0L;
+    CRYPTO_new_ex_data(CRYPTO_EX_INDEX_BIO, bio, &bio->ex_data);
+    if (method->create != NULL)
+        if (!method->create(bio)) {
+            CRYPTO_free_ex_data(CRYPTO_EX_INDEX_BIO, bio, &bio->ex_data);
+            return (0);
+        }
+    return (1);
+}
 
 int BIO_free(BIO *a)
-	{
-	int ret=0,i;
+{
+    int i;
 
-	if (a == NULL) return(0);
+    if (a == NULL)
+        return (0);
 
-	i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_BIO);
+    i = CRYPTO_add(&a->references, -1, CRYPTO_LOCK_BIO);
 #ifdef REF_PRINT
-	REF_PRINT("BIO",a);
+    REF_PRINT("BIO", a);
 #endif
-	if (i > 0) return(1);
+    if (i > 0)
+        return (1);
 #ifdef REF_CHECK
-	if (i < 0)
-		{
-		fprintf(stderr,"BIO_free, bad reference count\n");
-		abort();
-		}
+    if (i < 0) {
+        fprintf(stderr, "BIO_free, bad reference count\n");
+        abort();
+    }
 #endif
-	if ((a->callback != NULL) &&
-		((i=(int)a->callback(a,BIO_CB_FREE,NULL,0,0L,1L)) <= 0))
-			return(i);
+    if ((a->callback != NULL) &&
+        ((i = (int)a->callback(a, BIO_CB_FREE, NULL, 0, 0L, 1L)) <= 0))
+        return (i);
 
-	CRYPTO_free_ex_data(CRYPTO_EX_INDEX_BIO, a, &a->ex_data);
+    CRYPTO_free_ex_data(CRYPTO_EX_INDEX_BIO, a, &a->ex_data);
 
-	if ((a->method == NULL) || (a->method->destroy == NULL)) return(1);
-	ret=a->method->destroy(a);
-	OPENSSL_free(a);
-	return(1);
-	}
+    if ((a->method != NULL) && (a->method->destroy != NULL))
+        a->method->destroy(a);
+    OPENSSL_free(a);
+    return (1);
+}
 
 void BIO_vfree(BIO *a)
-    { BIO_free(a); }
+{
+    BIO_free(a);
+}
+
+void BIO_clear_flags(BIO *b, int flags)
+{
+    b->flags &= ~flags;
+}
+
+int BIO_test_flags(const BIO *b, int flags)
+{
+    return (b->flags & flags);
+}
+
+void BIO_set_flags(BIO *b, int flags)
+{
+    b->flags |= flags;
+}
+
+long (*BIO_get_callback(const BIO *b)) (struct bio_st *, int, const char *,
+                                        int, long, long) {
+    return b->callback;
+}
+
+void BIO_set_callback(BIO *b,
+                      long (*cb) (struct bio_st *, int, const char *, int,
+                                  long, long))
+{
+    b->callback = cb;
+}
+
+void BIO_set_callback_arg(BIO *b, char *arg)
+{
+    b->cb_arg = arg;
+}
+
+char *BIO_get_callback_arg(const BIO *b)
+{
+    return b->cb_arg;
+}
+
+const char *BIO_method_name(const BIO *b)
+{
+    return b->method->name;
+}
+
+int BIO_method_type(const BIO *b)
+{
+    return b->method->type;
+}
 
 int BIO_read(BIO *b, void *out, int outl)
-	{
-	int i;
-	long (*cb)(BIO *,int,const char *,int,long,long);
+{
+    int i;
+    long (*cb) (BIO *, int, const char *, int, long, long);
 
-	if ((b == NULL) || (b->method == NULL) || (b->method->bread == NULL))
-		{
-		BIOerr(BIO_F_BIO_READ,BIO_R_UNSUPPORTED_METHOD);
-		return(-2);
-		}
+    if ((b == NULL) || (b->method == NULL) || (b->method->bread == NULL)) {
+        BIOerr(BIO_F_BIO_READ, BIO_R_UNSUPPORTED_METHOD);
+        return (-2);
+    }
 
-	cb=b->callback;
-	if ((cb != NULL) &&
-		((i=(int)cb(b,BIO_CB_READ,out,outl,0L,1L)) <= 0))
-			return(i);
+    cb = b->callback;
+    if ((cb != NULL) &&
+        ((i = (int)cb(b, BIO_CB_READ, out, outl, 0L, 1L)) <= 0))
+        return (i);
 
-	if (!b->init)
-		{
-		BIOerr(BIO_F_BIO_READ,BIO_R_UNINITIALIZED);
-		return(-2);
-		}
+    if (!b->init) {
+        BIOerr(BIO_F_BIO_READ, BIO_R_UNINITIALIZED);
+        return (-2);
+    }
 
-	i=b->method->bread(b,out,outl);
+    i = b->method->bread(b, out, outl);
 
-	if (i > 0) b->num_read+=(unsigned long)i;
+    if (i > 0)
+        b->num_read += (unsigned long)i;
 
-	if (cb != NULL)
-		i=(int)cb(b,BIO_CB_READ|BIO_CB_RETURN,out,outl,
-			0L,(long)i);
-	return(i);
-	}
+    if (cb != NULL)
+        i = (int)cb(b, BIO_CB_READ | BIO_CB_RETURN, out, outl, 0L, (long)i);
+    return (i);
+}
 
 int BIO_write(BIO *b, const void *in, int inl)
-	{
-	int i;
-	long (*cb)(BIO *,int,const char *,int,long,long);
+{
+    int i;
+    long (*cb) (BIO *, int, const char *, int, long, long);
 
-	if (b == NULL)
-		return(0);
+    if (b == NULL)
+        return (0);
 
-	cb=b->callback;
-	if ((b->method == NULL) || (b->method->bwrite == NULL))
-		{
-		BIOerr(BIO_F_BIO_WRITE,BIO_R_UNSUPPORTED_METHOD);
-		return(-2);
-		}
+    cb = b->callback;
+    if ((b->method == NULL) || (b->method->bwrite == NULL)) {
+        BIOerr(BIO_F_BIO_WRITE, BIO_R_UNSUPPORTED_METHOD);
+        return (-2);
+    }
 
-	if ((cb != NULL) &&
-		((i=(int)cb(b,BIO_CB_WRITE,in,inl,0L,1L)) <= 0))
-			return(i);
+    if ((cb != NULL) &&
+        ((i = (int)cb(b, BIO_CB_WRITE, in, inl, 0L, 1L)) <= 0))
+        return (i);
 
-	if (!b->init)
-		{
-		BIOerr(BIO_F_BIO_WRITE,BIO_R_UNINITIALIZED);
-		return(-2);
-		}
+    if (!b->init) {
+        BIOerr(BIO_F_BIO_WRITE, BIO_R_UNINITIALIZED);
+        return (-2);
+    }
 
-	i=b->method->bwrite(b,in,inl);
+    i = b->method->bwrite(b, in, inl);
 
-	if (i > 0) b->num_write+=(unsigned long)i;
+    if (i > 0)
+        b->num_write += (unsigned long)i;
 
-	if (cb != NULL)
-		i=(int)cb(b,BIO_CB_WRITE|BIO_CB_RETURN,in,inl,
-			0L,(long)i);
-	return(i);
-	}
+    if (cb != NULL)
+        i = (int)cb(b, BIO_CB_WRITE | BIO_CB_RETURN, in, inl, 0L, (long)i);
+    return (i);
+}
 
 int BIO_puts(BIO *b, const char *in)
-	{
-	int i;
-	long (*cb)(BIO *,int,const char *,int,long,long);
+{
+    int i;
+    long (*cb) (BIO *, int, const char *, int, long, long);
 
-	if ((b == NULL) || (b->method == NULL) || (b->method->bputs == NULL))
-		{
-		BIOerr(BIO_F_BIO_PUTS,BIO_R_UNSUPPORTED_METHOD);
-		return(-2);
-		}
+    if ((b == NULL) || (b->method == NULL) || (b->method->bputs == NULL)) {
+        BIOerr(BIO_F_BIO_PUTS, BIO_R_UNSUPPORTED_METHOD);
+        return (-2);
+    }
 
-	cb=b->callback;
+    cb = b->callback;
 
-	if ((cb != NULL) &&
-		((i=(int)cb(b,BIO_CB_PUTS,in,0,0L,1L)) <= 0))
-			return(i);
+    if ((cb != NULL) && ((i = (int)cb(b, BIO_CB_PUTS, in, 0, 0L, 1L)) <= 0))
+        return (i);
 
-	if (!b->init)
-		{
-		BIOerr(BIO_F_BIO_PUTS,BIO_R_UNINITIALIZED);
-		return(-2);
-		}
+    if (!b->init) {
+        BIOerr(BIO_F_BIO_PUTS, BIO_R_UNINITIALIZED);
+        return (-2);
+    }
 
-	i=b->method->bputs(b,in);
+    i = b->method->bputs(b, in);
 
-	if (i > 0) b->num_write+=(unsigned long)i;
+    if (i > 0)
+        b->num_write += (unsigned long)i;
 
-	if (cb != NULL)
-		i=(int)cb(b,BIO_CB_PUTS|BIO_CB_RETURN,in,0,
-			0L,(long)i);
-	return(i);
-	}
+    if (cb != NULL)
+        i = (int)cb(b, BIO_CB_PUTS | BIO_CB_RETURN, in, 0, 0L, (long)i);
+    return (i);
+}
 
 int BIO_gets(BIO *b, char *in, int inl)
-	{
-	int i;
-	long (*cb)(BIO *,int,const char *,int,long,long);
-
-	if ((b == NULL) || (b->method == NULL) || (b->method->bgets == NULL))
-		{
-		BIOerr(BIO_F_BIO_GETS,BIO_R_UNSUPPORTED_METHOD);
-		return(-2);
-		}
-
-	cb=b->callback;
-
-	if ((cb != NULL) &&
-		((i=(int)cb(b,BIO_CB_GETS,in,inl,0L,1L)) <= 0))
-			return(i);
-
-	if (!b->init)
-		{
-		BIOerr(BIO_F_BIO_GETS,BIO_R_UNINITIALIZED);
-		return(-2);
-		}
-
-	i=b->method->bgets(b,in,inl);
-
-	if (cb != NULL)
-		i=(int)cb(b,BIO_CB_GETS|BIO_CB_RETURN,in,inl,
-			0L,(long)i);
-	return(i);
-	}
-
-int BIO_indent(BIO *b,int indent,int max)
-	{
-	if(indent < 0)
-		indent=0;
-	if(indent > max)
-		indent=max;
-	while(indent--)
-		if(BIO_puts(b," ") != 1)
-			return 0;
-	return 1;
-	}
+{
+    int i;
+    long (*cb) (BIO *, int, const char *, int, long, long);
+
+    if ((b == NULL) || (b->method == NULL) || (b->method->bgets == NULL)) {
+        BIOerr(BIO_F_BIO_GETS, BIO_R_UNSUPPORTED_METHOD);
+        return (-2);
+    }
+
+    cb = b->callback;
+
+    if ((cb != NULL) && ((i = (int)cb(b, BIO_CB_GETS, in, inl, 0L, 1L)) <= 0))
+        return (i);
+
+    if (!b->init) {
+        BIOerr(BIO_F_BIO_GETS, BIO_R_UNINITIALIZED);
+        return (-2);
+    }
+
+    i = b->method->bgets(b, in, inl);
+
+    if (cb != NULL)
+        i = (int)cb(b, BIO_CB_GETS | BIO_CB_RETURN, in, inl, 0L, (long)i);
+    return (i);
+}
+
+int BIO_indent(BIO *b, int indent, int max)
+{
+    if (indent < 0)
+        indent = 0;
+    if (indent > max)
+        indent = max;
+    while (indent--)
+        if (BIO_puts(b, " ") != 1)
+            return 0;
+    return 1;
+}
 
 long BIO_int_ctrl(BIO *b, int cmd, long larg, int iarg)
-	{
-	int i;
+{
+    int i;
 
-	i=iarg;
-	return(BIO_ctrl(b,cmd,larg,(char *)&i));
-	}
+    i = iarg;
+    return (BIO_ctrl(b, cmd, larg, (char *)&i));
+}
 
 char *BIO_ptr_ctrl(BIO *b, int cmd, long larg)
-	{
-	char *p=NULL;
+{
+    char *p = NULL;
 
-	if (BIO_ctrl(b,cmd,larg,(char *)&p) <= 0)
-		return(NULL);
-	else
-		return(p);
-	}
+    if (BIO_ctrl(b, cmd, larg, (char *)&p) <= 0)
+        return (NULL);
+    else
+        return (p);
+}
 
 long BIO_ctrl(BIO *b, int cmd, long larg, void *parg)
-	{
-	long ret;
-	long (*cb)(BIO *,int,const char *,int,long,long);
+{
+    long ret;
+    long (*cb) (BIO *, int, const char *, int, long, long);
 
-	if (b == NULL) return(0);
+    if (b == NULL)
+        return (0);
 
-	if ((b->method == NULL) || (b->method->ctrl == NULL))
-		{
-		BIOerr(BIO_F_BIO_CTRL,BIO_R_UNSUPPORTED_METHOD);
-		return(-2);
-		}
+    if ((b->method == NULL) || (b->method->ctrl == NULL)) {
+        BIOerr(BIO_F_BIO_CTRL, BIO_R_UNSUPPORTED_METHOD);
+        return (-2);
+    }
 
-	cb=b->callback;
+    cb = b->callback;
 
-	if ((cb != NULL) &&
-		((ret=cb(b,BIO_CB_CTRL,parg,cmd,larg,1L)) <= 0))
-		return(ret);
+    if ((cb != NULL) &&
+        ((ret = cb(b, BIO_CB_CTRL, parg, cmd, larg, 1L)) <= 0))
+        return (ret);
 
-	ret=b->method->ctrl(b,cmd,larg,parg);
+    ret = b->method->ctrl(b, cmd, larg, parg);
 
-	if (cb != NULL)
-		ret=cb(b,BIO_CB_CTRL|BIO_CB_RETURN,parg,cmd,
-			larg,ret);
-	return(ret);
-	}
+    if (cb != NULL)
+        ret = cb(b, BIO_CB_CTRL | BIO_CB_RETURN, parg, cmd, larg, ret);
+    return (ret);
+}
 
-long BIO_callback_ctrl(BIO *b, int cmd, void (*fp)(struct bio_st *, int, const char *, int, long, long))
-	{
-	long ret;
-	long (*cb)(BIO *,int,const char *,int,long,long);
+long BIO_callback_ctrl(BIO *b, int cmd,
+                       void (*fp) (struct bio_st *, int, const char *, int,
+                                   long, long))
+{
+    long ret;
+    long (*cb) (BIO *, int, const char *, int, long, long);
 
-	if (b == NULL) return(0);
+    if (b == NULL)
+        return (0);
 
-	if ((b->method == NULL) || (b->method->callback_ctrl == NULL))
-		{
-		BIOerr(BIO_F_BIO_CALLBACK_CTRL,BIO_R_UNSUPPORTED_METHOD);
-		return(-2);
-		}
+    if ((b->method == NULL) || (b->method->callback_ctrl == NULL)) {
+        BIOerr(BIO_F_BIO_CALLBACK_CTRL, BIO_R_UNSUPPORTED_METHOD);
+        return (-2);
+    }
 
-	cb=b->callback;
+    cb = b->callback;
 
-	if ((cb != NULL) &&
-		((ret=cb(b,BIO_CB_CTRL,(void *)&fp,cmd,0,1L)) <= 0))
-		return(ret);
+    if ((cb != NULL) &&
+        ((ret = cb(b, BIO_CB_CTRL, (void *)&fp, cmd, 0, 1L)) <= 0))
+        return (ret);
 
-	ret=b->method->callback_ctrl(b,cmd,fp);
+    ret = b->method->callback_ctrl(b, cmd, fp);
 
-	if (cb != NULL)
-		ret=cb(b,BIO_CB_CTRL|BIO_CB_RETURN,(void *)&fp,cmd,
-			0,ret);
-	return(ret);
-	}
+    if (cb != NULL)
+        ret = cb(b, BIO_CB_CTRL | BIO_CB_RETURN, (void *)&fp, cmd, 0, ret);
+    return (ret);
+}
 
-/* It is unfortunate to duplicate in functions what the BIO_(w)pending macros
+/*
+ * It is unfortunate to duplicate in functions what the BIO_(w)pending macros
  * do; but those macros have inappropriate return type, and for interfacing
- * from other programming languages, C macros aren't much of a help anyway. */
+ * from other programming languages, C macros aren't much of a help anyway.
+ */
 size_t BIO_ctrl_pending(BIO *bio)
-	{
-	return BIO_ctrl(bio, BIO_CTRL_PENDING, 0, NULL);
-	}
+{
+    return BIO_ctrl(bio, BIO_CTRL_PENDING, 0, NULL);
+}
 
 size_t BIO_ctrl_wpending(BIO *bio)
-	{
-	return BIO_ctrl(bio, BIO_CTRL_WPENDING, 0, NULL);
-	}
-
+{
+    return BIO_ctrl(bio, BIO_CTRL_WPENDING, 0, NULL);
+}
 
 /* put the 'bio' on the end of b's list of operators */
 BIO *BIO_push(BIO *b, BIO *bio)
-	{
-	BIO *lb;
-
-	if (b == NULL) return(bio);
-	lb=b;
-	while (lb->next_bio != NULL)
-		lb=lb->next_bio;
-	lb->next_bio=bio;
-	if (bio != NULL)
-		bio->prev_bio=lb;
-	/* called to do internal processing */
-	BIO_ctrl(b,BIO_CTRL_PUSH,0,NULL);
-	return(b);
-	}
+{
+    BIO *lb;
+
+    if (b == NULL)
+        return (bio);
+    lb = b;
+    while (lb->next_bio != NULL)
+        lb = lb->next_bio;
+    lb->next_bio = bio;
+    if (bio != NULL)
+        bio->prev_bio = lb;
+    /* called to do internal processing */
+    BIO_ctrl(b, BIO_CTRL_PUSH, 0, lb);
+    return (b);
+}
 
 /* Remove the first and return the rest */
 BIO *BIO_pop(BIO *b)
-	{
-	BIO *ret;
+{
+    BIO *ret;
 
-	if (b == NULL) return(NULL);
-	ret=b->next_bio;
+    if (b == NULL)
+        return (NULL);
+    ret = b->next_bio;
 
-	BIO_ctrl(b,BIO_CTRL_POP,0,NULL);
+    BIO_ctrl(b, BIO_CTRL_POP, 0, b);
 
-	if (b->prev_bio != NULL)
-		b->prev_bio->next_bio=b->next_bio;
-	if (b->next_bio != NULL)
-		b->next_bio->prev_bio=b->prev_bio;
+    if (b->prev_bio != NULL)
+        b->prev_bio->next_bio = b->next_bio;
+    if (b->next_bio != NULL)
+        b->next_bio->prev_bio = b->prev_bio;
 
-	b->next_bio=NULL;
-	b->prev_bio=NULL;
-	return(ret);
-	}
+    b->next_bio = NULL;
+    b->prev_bio = NULL;
+    return (ret);
+}
 
 BIO *BIO_get_retry_BIO(BIO *bio, int *reason)
-	{
-	BIO *b,*last;
-
-	b=last=bio;
-	for (;;)
-		{
-		if (!BIO_should_retry(b)) break;
-		last=b;
-		b=b->next_bio;
-		if (b == NULL) break;
-		}
-	if (reason != NULL) *reason=last->retry_reason;
-	return(last);
-	}
+{
+    BIO *b, *last;
+
+    b = last = bio;
+    for (;;) {
+        if (!BIO_should_retry(b))
+            break;
+        last = b;
+        b = b->next_bio;
+        if (b == NULL)
+            break;
+    }
+    if (reason != NULL)
+        *reason = last->retry_reason;
+    return (last);
+}
 
 int BIO_get_retry_reason(BIO *bio)
-	{
-	return(bio->retry_reason);
-	}
+{
+    return (bio->retry_reason);
+}
 
 BIO *BIO_find_type(BIO *bio, int type)
-	{
-	int mt,mask;
-
-	if(!bio) return NULL;
-	mask=type&0xff;
-	do	{
-		if (bio->method != NULL)
-			{
-			mt=bio->method->type;
-
-			if (!mask)
-				{
-				if (mt & type) return(bio);
-				}
-			else if (mt == type)
-				return(bio);
-			}
-		bio=bio->next_bio;
-		} while (bio != NULL);
-	return(NULL);
-	}
+{
+    int mt, mask;
+
+    if (!bio)
+        return NULL;
+    mask = type & 0xff;
+    do {
+        if (bio->method != NULL) {
+            mt = bio->method->type;
+
+            if (!mask) {
+                if (mt & type)
+                    return (bio);
+            } else if (mt == type)
+                return (bio);
+        }
+        bio = bio->next_bio;
+    } while (bio != NULL);
+    return (NULL);
+}
 
 BIO *BIO_next(BIO *b)
-	{
-	if(!b) return NULL;
-	return b->next_bio;
-	}
+{
+    if (!b)
+        return NULL;
+    return b->next_bio;
+}
 
 void BIO_free_all(BIO *bio)
-	{
-	BIO *b;
-	int ref;
-
-	while (bio != NULL)
-		{
-		b=bio;
-		ref=b->references;
-		bio=bio->next_bio;
-		BIO_free(b);
-		/* Since ref count > 1, don't free anyone else. */
-		if (ref > 1) break;
-		}
-	}
+{
+    BIO *b;
+    int ref;
+
+    while (bio != NULL) {
+        b = bio;
+        ref = b->references;
+        bio = bio->next_bio;
+        BIO_free(b);
+        /* Since ref count > 1, don't free anyone else. */
+        if (ref > 1)
+            break;
+    }
+}
 
 BIO *BIO_dup_chain(BIO *in)
-	{
-	BIO *ret=NULL,*eoc=NULL,*bio,*new;
-
-	for (bio=in; bio != NULL; bio=bio->next_bio)
-		{
-		if ((new=BIO_new(bio->method)) == NULL) goto err;
-		new->callback=bio->callback;
-		new->cb_arg=bio->cb_arg;
-		new->init=bio->init;
-		new->shutdown=bio->shutdown;
-		new->flags=bio->flags;
-
-		/* This will let SSL_s_sock() work with stdin/stdout */
-		new->num=bio->num;
-
-		if (!BIO_dup_state(bio,(char *)new))
-			{
-			BIO_free(new);
-			goto err;
-			}
-
-		/* copy app data */
-		if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_BIO, &new->ex_data,
-					&bio->ex_data))
-			goto err;
-
-		if (ret == NULL)
-			{
-			eoc=new;
-			ret=eoc;
-			}
-		else
-			{
-			BIO_push(eoc,new);
-			eoc=new;
-			}
-		}
-	return(ret);
-err:
-	if (ret != NULL)
-		BIO_free(ret);
-	return(NULL);	
-	}
+{
+    BIO *ret = NULL, *eoc = NULL, *bio, *new_bio;
+
+    for (bio = in; bio != NULL; bio = bio->next_bio) {
+        if ((new_bio = BIO_new(bio->method)) == NULL)
+            goto err;
+        new_bio->callback = bio->callback;
+        new_bio->cb_arg = bio->cb_arg;
+        new_bio->init = bio->init;
+        new_bio->shutdown = bio->shutdown;
+        new_bio->flags = bio->flags;
+
+        /* This will let SSL_s_sock() work with stdin/stdout */
+        new_bio->num = bio->num;
+
+        if (!BIO_dup_state(bio, (char *)new_bio)) {
+            BIO_free(new_bio);
+            goto err;
+        }
+
+        /* copy app data */
+        if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_BIO, &new_bio->ex_data,
+                                &bio->ex_data))
+            goto err;
+
+        if (ret == NULL) {
+            eoc = new_bio;
+            ret = eoc;
+        } else {
+            BIO_push(eoc, new_bio);
+            eoc = new_bio;
+        }
+    }
+    return (ret);
+ err:
+    BIO_free(ret);
+    return (NULL);
+}
 
 void BIO_copy_next_retry(BIO *b)
-	{
-	BIO_set_flags(b,BIO_get_retry_flags(b->next_bio));
-	b->retry_reason=b->next_bio->retry_reason;
-	}
+{
+    BIO_set_flags(b, BIO_get_retry_flags(b->next_bio));
+    b->retry_reason = b->next_bio->retry_reason;
+}
 
 int BIO_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
-	     CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
-	{
-	return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_BIO, argl, argp,
-				new_func, dup_func, free_func);
-	}
+                         CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
+{
+    return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_BIO, argl, argp,
+                                   new_func, dup_func, free_func);
+}
 
 int BIO_set_ex_data(BIO *bio, int idx, void *data)
-	{
-	return(CRYPTO_set_ex_data(&(bio->ex_data),idx,data));
-	}
+{
+    return (CRYPTO_set_ex_data(&(bio->ex_data), idx, data));
+}
 
 void *BIO_get_ex_data(BIO *bio, int idx)
-	{
-	return(CRYPTO_get_ex_data(&(bio->ex_data),idx));
-	}
+{
+    return (CRYPTO_get_ex_data(&(bio->ex_data), idx));
+}
 
 unsigned long BIO_number_read(BIO *bio)
 {
-	if(bio) return bio->num_read;
-	return 0;
+    if (bio)
+        return bio->num_read;
+    return 0;
 }
 
 unsigned long BIO_number_written(BIO *bio)
 {
-	if(bio) return bio->num_write;
-	return 0;
+    if (bio)
+        return bio->num_write;
+    return 0;
 }
-
-IMPLEMENT_STACK_OF(BIO)