2 ''' $RCSfile$$Revision$$Date$
20 .ie \\n(.$>=3 .ne \\$3
36 ''' Set up \*(-- to give an unbreakable dash;
37 ''' string Tr holds user defined translation string.
38 ''' Bell System Logo is used as a dummy character.
44 .if (\n(.H=4u)&(1m=24u) .ds -- \(*W\h'-12u'\(*W\h'-12u'-\" diablo 10 pitch
45 .if (\n(.H=4u)&(1m=20u) .ds -- \(*W\h'-12u'\(*W\h'-8u'-\" diablo 12 pitch
48 ''' \*(M", \*(S", \*(N" and \*(T" are the equivalent of
49 ''' \*(L" and \*(R", except that they are used on ".xx" lines,
50 ''' such as .IP and .SH, which do another additional levels of
51 ''' double-quote interpretation
80 .\" If the F register is turned on, we'll generate
81 .\" index entries out stderr for the following things:
86 .\" X<> Xref (embedded
87 .\" Of course, you have to process the output yourself
88 .\" in some meaninful fashion.
91 .tm Index:\\$1\t\\n%\t"\\$2"
96 .TH BIO_find_type 3 "0.9.7d" "2/Sep/2004" "OpenSSL"
100 .ds C+ C\v'-.1v'\h'-1p'\s-2+\h'-1p'+\s0\v'.1v'\h'-1p'
101 .de CQ \" put $1 in typewriter font
107 \\&\\$2 \\$3 \\$4 \\$5 \\$6 \\$7
110 .\" @(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2
111 . \" AM - accent mark definitions
113 . \" fudge factors for nroff and troff
122 . ds #H ((1u-(\\\\n(.fu%2u))*.13m)
128 . \" simple accents for nroff and troff
141 . ds ' \\k:\h'-(\\n(.wu*8/10-\*(#H)'\'\h"|\\n:u"
142 . ds ` \\k:\h'-(\\n(.wu*8/10-\*(#H)'\`\h'|\\n:u'
143 . ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'^\h'|\\n:u'
144 . ds , \\k:\h'-(\\n(.wu*8/10)',\h'|\\n:u'
145 . ds ~ \\k:\h'-(\\n(.wu-\*(#H-.1m)'~\h'|\\n:u'
146 . ds ? \s-2c\h'-\w'c'u*7/10'\u\h'\*(#H'\zi\d\s+2\h'\w'c'u*8/10'
147 . ds ! \s-2\(or\s+2\h'-\w'\(or'u'\v'-.8m'.\v'.8m'
148 . ds / \\k:\h'-(\\n(.wu*8/10-\*(#H)'\z\(sl\h'|\\n:u'
149 . ds q o\h'-\w'o'u*8/10'\s-4\v'.4m'\z\(*i\v'-.4m'\s+4\h'\w'o'u*8/10'
151 . \" troff and (daisy-wheel) nroff accents
152 .ds : \\k:\h'-(\\n(.wu*8/10-\*(#H+.1m+\*(#F)'\v'-\*(#V'\z.\h'.2m+\*(#F'.\h'|\\n:u'\v'\*(#V'
153 .ds 8 \h'\*(#H'\(*b\h'-\*(#H'
154 .ds v \\k:\h'-(\\n(.wu*9/10-\*(#H)'\v'-\*(#V'\*(#[\s-4v\s0\v'\*(#V'\h'|\\n:u'\*(#]
155 .ds _ \\k:\h'-(\\n(.wu*9/10-\*(#H+(\*(#F*2/3))'\v'-.4m'\z\(hy\v'.4m'\h'|\\n:u'
156 .ds . \\k:\h'-(\\n(.wu*8/10)'\v'\*(#V*4/10'\z.\v'-\*(#V*4/10'\h'|\\n:u'
157 .ds 3 \*(#[\v'.2m'\s-2\&3\s0\v'-.2m'\*(#]
158 .ds o \\k:\h'-(\\n(.wu+\w'\(de'u-\*(#H)/2u'\v'-.3n'\*(#[\z\(de\v'.3n'\h'|\\n:u'\*(#]
159 .ds d- \h'\*(#H'\(pd\h'-\w'~'u'\v'-.25m'\f2\(hy\fP\v'.25m'\h'-\*(#H'
160 .ds D- D\\k:\h'-\w'D'u'\v'-.11m'\z\(hy\v'.11m'\h'|\\n:u'
161 .ds th \*(#[\v'.3m'\s+1I\s-1\v'-.3m'\h'-(\w'I'u*2/3)'\s-1o\s+1\*(#]
162 .ds Th \*(#[\s+2I\s-2\h'-\w'I'u*3/5'\v'-.3m'o\v'.3m'\*(#]
163 .ds ae a\h'-(\w'a'u*4/10)'e
164 .ds Ae A\h'-(\w'A'u*4/10)'E
165 .ds oe o\h'-(\w'o'u*4/10)'e
166 .ds Oe O\h'-(\w'O'u*4/10)'E
167 . \" corrections for vroff
168 .if v .ds ~ \\k:\h'-(\\n(.wu*9/10-\*(#H)'\s-2\u~\d\s+2\h'|\\n:u'
169 .if v .ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'\v'-.4m'^\v'.4m'\h'|\\n:u'
170 . \" for low resolution devices (crt and lpr)
171 .if \n(.H>23 .if \n(.V>19 \
175 . ds v \h'-1'\o'\(aa\(ga'
191 BIO_find_type, BIO_next \- BIO chain traversal
195 \& #include <openssl/bio.h>
198 \& BIO * BIO_find_type(BIO *b,int bio_type);
199 \& BIO * BIO_next(BIO *b);
202 \& #define BIO_method_type(b) ((b)->method->type)
205 \& #define BIO_TYPE_NONE 0
206 \& #define BIO_TYPE_MEM (1|0x0400)
207 \& #define BIO_TYPE_FILE (2|0x0400)
210 \& #define BIO_TYPE_FD (4|0x0400|0x0100)
211 \& #define BIO_TYPE_SOCKET (5|0x0400|0x0100)
212 \& #define BIO_TYPE_NULL (6|0x0400)
213 \& #define BIO_TYPE_SSL (7|0x0200)
214 \& #define BIO_TYPE_MD (8|0x0200)
215 \& #define BIO_TYPE_BUFFER (9|0x0200)
216 \& #define BIO_TYPE_CIPHER (10|0x0200)
217 \& #define BIO_TYPE_BASE64 (11|0x0200)
218 \& #define BIO_TYPE_CONNECT (12|0x0400|0x0100)
219 \& #define BIO_TYPE_ACCEPT (13|0x0400|0x0100)
220 \& #define BIO_TYPE_PROXY_CLIENT (14|0x0200)
221 \& #define BIO_TYPE_PROXY_SERVER (15|0x0200)
222 \& #define BIO_TYPE_NBIO_TEST (16|0x0200)
223 \& #define BIO_TYPE_NULL_FILTER (17|0x0200)
224 \& #define BIO_TYPE_BER (18|0x0200)
225 \& #define BIO_TYPE_BIO (19|0x0400)
228 \& #define BIO_TYPE_DESCRIPTOR 0x0100
229 \& #define BIO_TYPE_FILTER 0x0200
230 \& #define BIO_TYPE_SOURCE_SINK 0x0400
233 The \fIBIO_find_type()\fR searches for a BIO of a given type in a chain, starting
234 at BIO \fBb\fR. If \fBtype\fR is a specific type (such as BIO_TYPE_MEM) then a search
235 is made for a BIO of that type. If \fBtype\fR is a general type (such as
236 \fBBIO_TYPE_SOURCE_SINK\fR) then the next matching BIO of the given general type is
237 searched for. \fIBIO_find_type()\fR returns the next matching BIO or NULL if none is
240 Note: not all the \fBBIO_TYPE_*\fR types above have corresponding BIO implementations.
242 \fIBIO_next()\fR returns the next BIO in a chain. It can be used to traverse all BIOs
243 in a chain or used in conjunction with \fIBIO_find_type()\fR to find all BIOs of a
246 \fIBIO_method_type()\fR returns the type of a BIO.
248 \fIBIO_find_type()\fR returns a matching BIO or NULL for no match.
250 \fIBIO_next()\fR returns the next BIO in a chain.
252 \fIBIO_method_type()\fR returns the type of the BIO \fBb\fR.
254 \fIBIO_next()\fR was added to OpenSSL 0.9.6 to provide a \*(L'clean\*(R' way to traverse a BIO
255 chain or find multiple matches using \fIBIO_find_type()\fR. Previous versions had to
259 \& next = bio->next_bio;
262 \fIBIO_find_type()\fR in OpenSSL 0.9.5a and earlier could not be safely passed a
263 NULL pointer for the \fBb\fR argument.
265 Traverse a chain looking for digest BIOs:
269 \& btmp = in_bio; /* in_bio is chain to search through */
273 \& btmp = BIO_find_type(btmp, BIO_TYPE_MD);
274 \& if(btmp == NULL) break; /* Not found */
275 \& /* btmp is a digest BIO, do something with it ...*/
279 \& btmp = BIO_next(btmp);
286 .IX Title "BIO_find_type 3"
287 .IX Name "BIO_find_type, BIO_next - BIO chain traversal"
291 .IX Header "SYNOPSIS"
293 .IX Header "DESCRIPTION"
295 .IX Header "RETURN VALUES"
303 .IX Header "SEE ALSO"