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129.\" ========================================================================
130.\"
131.IX Title "BIO_find_type 3"
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124.\" ========================================================================
125.\"
126.IX Title "BIO_find_type 3"
|
132.TH BIO_find_type 3 "2010-03-24" "0.9.8n" "OpenSSL"
| 127.TH BIO_find_type 3 "2010-11-16" "0.9.8p" "OpenSSL"
128.\" For nroff, turn off justification. Always turn off hyphenation; it makes
129.\" way too many mistakes in technical documents.
130.if n .ad l
131.nh
|
133.SH "NAME"
134BIO_find_type, BIO_next \- BIO chain traversal
135.SH "SYNOPSIS"
136.IX Header "SYNOPSIS"
137.Vb 1
138\& #include <openssl/bio.h>
| 132.SH "NAME"
133BIO_find_type, BIO_next \- BIO chain traversal
134.SH "SYNOPSIS"
135.IX Header "SYNOPSIS"
136.Vb 1
137\& #include <openssl/bio.h>
|
139.Ve
140.PP
141.Vb 2
| 138\&
|
142\& BIO * BIO_find_type(BIO *b,int bio_type);
143\& BIO * BIO_next(BIO *b);
| 139\& BIO * BIO_find_type(BIO *b,int bio_type);
140\& BIO * BIO_next(BIO *b);
|
144.Ve
145.PP
146.Vb 1
147\& #define BIO_method_type(b) ((b)->method->type)
148.Ve
149.PP
150.Vb 3
| 141\&
142\& #define BIO_method_type(b) ((b)\->method\->type)
143\&
|
151\& #define BIO_TYPE_NONE 0
152\& #define BIO_TYPE_MEM (1|0x0400)
153\& #define BIO_TYPE_FILE (2|0x0400)
| 144\& #define BIO_TYPE_NONE 0
145\& #define BIO_TYPE_MEM (1|0x0400)
146\& #define BIO_TYPE_FILE (2|0x0400)
|
154.Ve
155.PP
156.Vb 16
| 147\&
|
157\& #define BIO_TYPE_FD (4|0x0400|0x0100)
158\& #define BIO_TYPE_SOCKET (5|0x0400|0x0100)
159\& #define BIO_TYPE_NULL (6|0x0400)
160\& #define BIO_TYPE_SSL (7|0x0200)
161\& #define BIO_TYPE_MD (8|0x0200)
162\& #define BIO_TYPE_BUFFER (9|0x0200)
163\& #define BIO_TYPE_CIPHER (10|0x0200)
164\& #define BIO_TYPE_BASE64 (11|0x0200)
165\& #define BIO_TYPE_CONNECT (12|0x0400|0x0100)
166\& #define BIO_TYPE_ACCEPT (13|0x0400|0x0100)
167\& #define BIO_TYPE_PROXY_CLIENT (14|0x0200)
168\& #define BIO_TYPE_PROXY_SERVER (15|0x0200)
169\& #define BIO_TYPE_NBIO_TEST (16|0x0200)
170\& #define BIO_TYPE_NULL_FILTER (17|0x0200)
171\& #define BIO_TYPE_BER (18|0x0200)
172\& #define BIO_TYPE_BIO (19|0x0400)
| 148\& #define BIO_TYPE_FD (4|0x0400|0x0100)
149\& #define BIO_TYPE_SOCKET (5|0x0400|0x0100)
150\& #define BIO_TYPE_NULL (6|0x0400)
151\& #define BIO_TYPE_SSL (7|0x0200)
152\& #define BIO_TYPE_MD (8|0x0200)
153\& #define BIO_TYPE_BUFFER (9|0x0200)
154\& #define BIO_TYPE_CIPHER (10|0x0200)
155\& #define BIO_TYPE_BASE64 (11|0x0200)
156\& #define BIO_TYPE_CONNECT (12|0x0400|0x0100)
157\& #define BIO_TYPE_ACCEPT (13|0x0400|0x0100)
158\& #define BIO_TYPE_PROXY_CLIENT (14|0x0200)
159\& #define BIO_TYPE_PROXY_SERVER (15|0x0200)
160\& #define BIO_TYPE_NBIO_TEST (16|0x0200)
161\& #define BIO_TYPE_NULL_FILTER (17|0x0200)
162\& #define BIO_TYPE_BER (18|0x0200)
163\& #define BIO_TYPE_BIO (19|0x0400)
|
173.Ve
174.PP
175.Vb 3
| 164\&
|
176\& #define BIO_TYPE_DESCRIPTOR 0x0100
177\& #define BIO_TYPE_FILTER 0x0200
178\& #define BIO_TYPE_SOURCE_SINK 0x0400
179.Ve
180.SH "DESCRIPTION"
181.IX Header "DESCRIPTION"
182The \fIBIO_find_type()\fR searches for a \s-1BIO\s0 of a given type in a chain, starting
183at \s-1BIO\s0 \fBb\fR. If \fBtype\fR is a specific type (such as \s-1BIO_TYPE_MEM\s0) then a search
184is made for a \s-1BIO\s0 of that type. If \fBtype\fR is a general type (such as
185\&\fB\s-1BIO_TYPE_SOURCE_SINK\s0\fR) then the next matching \s-1BIO\s0 of the given general type is
186searched for. \fIBIO_find_type()\fR returns the next matching \s-1BIO\s0 or \s-1NULL\s0 if none is
187found.
188.PP
189Note: not all the \fBBIO_TYPE_*\fR types above have corresponding \s-1BIO\s0 implementations.
190.PP
191\&\fIBIO_next()\fR returns the next \s-1BIO\s0 in a chain. It can be used to traverse all BIOs
192in a chain or used in conjunction with \fIBIO_find_type()\fR to find all BIOs of a
193certain type.
194.PP
195\&\fIBIO_method_type()\fR returns the type of a \s-1BIO\s0.
196.SH "RETURN VALUES"
197.IX Header "RETURN VALUES"
198\&\fIBIO_find_type()\fR returns a matching \s-1BIO\s0 or \s-1NULL\s0 for no match.
199.PP
200\&\fIBIO_next()\fR returns the next \s-1BIO\s0 in a chain.
201.PP
202\&\fIBIO_method_type()\fR returns the type of the \s-1BIO\s0 \fBb\fR.
203.SH "NOTES"
204.IX Header "NOTES"
205\&\fIBIO_next()\fR was added to OpenSSL 0.9.6 to provide a 'clean' way to traverse a \s-1BIO\s0
206chain or find multiple matches using \fIBIO_find_type()\fR. Previous versions had to
207use:
208.PP
209.Vb 1
| 165\& #define BIO_TYPE_DESCRIPTOR 0x0100
166\& #define BIO_TYPE_FILTER 0x0200
167\& #define BIO_TYPE_SOURCE_SINK 0x0400
168.Ve
169.SH "DESCRIPTION"
170.IX Header "DESCRIPTION"
171The \fIBIO_find_type()\fR searches for a \s-1BIO\s0 of a given type in a chain, starting
172at \s-1BIO\s0 \fBb\fR. If \fBtype\fR is a specific type (such as \s-1BIO_TYPE_MEM\s0) then a search
173is made for a \s-1BIO\s0 of that type. If \fBtype\fR is a general type (such as
174\&\fB\s-1BIO_TYPE_SOURCE_SINK\s0\fR) then the next matching \s-1BIO\s0 of the given general type is
175searched for. \fIBIO_find_type()\fR returns the next matching \s-1BIO\s0 or \s-1NULL\s0 if none is
176found.
177.PP
178Note: not all the \fBBIO_TYPE_*\fR types above have corresponding \s-1BIO\s0 implementations.
179.PP
180\&\fIBIO_next()\fR returns the next \s-1BIO\s0 in a chain. It can be used to traverse all BIOs
181in a chain or used in conjunction with \fIBIO_find_type()\fR to find all BIOs of a
182certain type.
183.PP
184\&\fIBIO_method_type()\fR returns the type of a \s-1BIO\s0.
185.SH "RETURN VALUES"
186.IX Header "RETURN VALUES"
187\&\fIBIO_find_type()\fR returns a matching \s-1BIO\s0 or \s-1NULL\s0 for no match.
188.PP
189\&\fIBIO_next()\fR returns the next \s-1BIO\s0 in a chain.
190.PP
191\&\fIBIO_method_type()\fR returns the type of the \s-1BIO\s0 \fBb\fR.
192.SH "NOTES"
193.IX Header "NOTES"
194\&\fIBIO_next()\fR was added to OpenSSL 0.9.6 to provide a 'clean' way to traverse a \s-1BIO\s0
195chain or find multiple matches using \fIBIO_find_type()\fR. Previous versions had to
196use:
197.PP
198.Vb 1
|
210\& next = bio->next_bio;
| 199\& next = bio\->next_bio;
|
211.Ve
212.SH "BUGS"
213.IX Header "BUGS"
214\&\fIBIO_find_type()\fR in OpenSSL 0.9.5a and earlier could not be safely passed a
215\&\s-1NULL\s0 pointer for the \fBb\fR argument.
216.SH "EXAMPLE"
217.IX Header "EXAMPLE"
218Traverse a chain looking for digest BIOs:
219.PP
220.Vb 2
221\& BIO *btmp;
222\& btmp = in_bio; /* in_bio is chain to search through */
| 200.Ve
201.SH "BUGS"
202.IX Header "BUGS"
203\&\fIBIO_find_type()\fR in OpenSSL 0.9.5a and earlier could not be safely passed a
204\&\s-1NULL\s0 pointer for the \fBb\fR argument.
205.SH "EXAMPLE"
206.IX Header "EXAMPLE"
207Traverse a chain looking for digest BIOs:
208.PP
209.Vb 2
210\& BIO *btmp;
211\& btmp = in_bio; /* in_bio is chain to search through */
|
223.Ve
224.PP
225.Vb 5
| 212\&
|
226\& do {
227\& btmp = BIO_find_type(btmp, BIO_TYPE_MD);
228\& if(btmp == NULL) break; /* Not found */
229\& /* btmp is a digest BIO, do something with it ...*/
230\& ...
| 213\& do {
214\& btmp = BIO_find_type(btmp, BIO_TYPE_MD);
215\& if(btmp == NULL) break; /* Not found */
216\& /* btmp is a digest BIO, do something with it ...*/
217\& ...
|
231.Ve
232.PP
233.Vb 2
| 218\&
|
234\& btmp = BIO_next(btmp);
235\& } while(btmp);
236.Ve
237.SH "SEE ALSO"
238.IX Header "SEE ALSO"
239\&\s-1TBA\s0
| 219\& btmp = BIO_next(btmp);
220\& } while(btmp);
221.Ve
222.SH "SEE ALSO"
223.IX Header "SEE ALSO"
224\&\s-1TBA\s0
|