ZerethShell — File Manager

BIO_find_type.3ssl

.\" Automatically generated by Pod::Man 4.11 (Pod::Simple 3.35)
.\"
.\" Standard preamble:
.\" ========================================================================
.de Sp \" Vertical space (when we can't use .PP)
.if t .sp .5v
.if n .sp
..
.de Vb \" Begin verbatim text
.ft CW
.nf
.ne \\$1
..
.de Ve \" End verbatim text
.ft R
.fi
..
.\" Set up some character translations and predefined strings.  \*(-- will
.\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left
.\" double quote, and \*(R" will give a right double quote.  \*(C+ will
.\" give a nicer C++.  Capital omega is used to do unbreakable dashes and
.\" therefore won't be available.  \*(C` and \*(C' expand to `' in nroff,
.\" nothing in troff, for use with C<>.
.tr \(*W-
.ds C+ C\v'-.1v'\h'-1p'\s-2+\h'-1p'+\s0\v'.1v'\h'-1p'
.ie n \{\
.    ds -- \(*W-
.    ds PI pi
.    if (\n(.H=4u)&(1m=24u) .ds -- \(*W\h'-12u'\(*W\h'-12u'-\" diablo 10 pitch
.    if (\n(.H=4u)&(1m=20u) .ds -- \(*W\h'-12u'\(*W\h'-8u'-\"  diablo 12 pitch
.    ds L" ""
.    ds R" ""
.    ds C` ""
.    ds C' ""
'br\}
.el\{\
.    ds -- \|\(em\|
.    ds PI \(*p
.    ds L" ``
.    ds R" ''
.    ds C`
.    ds C'
'br\}
.\"
.\" Escape single quotes in literal strings from groff's Unicode transform.
.ie \n(.g .ds Aq \(aq
.el       .ds Aq '
.\"
.\" If the F register is >0, we'll generate index entries on stderr for
.\" titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index
.\" entries marked with X<> in POD.  Of course, you'll have to process the
.\" output yourself in some meaningful fashion.
.\"
.\" Avoid warning from groff about undefined register 'F'.
.de IX
..
.nr rF 0
.if \n(.g .if rF .nr rF 1
.if (\n(rF:(\n(.g==0)) \{\
.    if \nF \{\
.        de IX
.        tm Index:\\$1\t\\n%\t"\\$2"
..
.        if !\nF==2 \{\
.            nr % 0
.            nr F 2
.        \}
.    \}
.\}
.rr rF
.\"
.\" Accent mark definitions (@(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2).
.\" Fear.  Run.  Save yourself.  No user-serviceable parts.
.    \" fudge factors for nroff and troff
.if n \{\
.    ds #H 0
.    ds #V .8m
.    ds #F .3m
.    ds #[ \f1
.    ds #] \fP
.\}
.if t \{\
.    ds #H ((1u-(\\\\n(.fu%2u))*.13m)
.    ds #V .6m
.    ds #F 0
.    ds #[ \&
.    ds #] \&
.\}
.    \" simple accents for nroff and troff
.if n \{\
.    ds ' \&
.    ds ` \&
.    ds ^ \&
.    ds , \&
.    ds ~ ~
.    ds /
.\}
.if t \{\
.    ds ' \\k:\h'-(\\n(.wu*8/10-\*(#H)'\'\h"|\\n:u"
.    ds ` \\k:\h'-(\\n(.wu*8/10-\*(#H)'\`\h'|\\n:u'
.    ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'^\h'|\\n:u'
.    ds , \\k:\h'-(\\n(.wu*8/10)',\h'|\\n:u'
.    ds ~ \\k:\h'-(\\n(.wu-\*(#H-.1m)'~\h'|\\n:u'
.    ds / \\k:\h'-(\\n(.wu*8/10-\*(#H)'\z\(sl\h'|\\n:u'
.\}
.    \" troff and (daisy-wheel) nroff accents
.ds : \\k:\h'-(\\n(.wu*8/10-\*(#H+.1m+\*(#F)'\v'-\*(#V'\z.\h'.2m+\*(#F'.\h'|\\n:u'\v'\*(#V'
.ds 8 \h'\*(#H'\(*b\h'-\*(#H'
.ds o \\k:\h'-(\\n(.wu+\w'\(de'u-\*(#H)/2u'\v'-.3n'\*(#[\z\(de\v'.3n'\h'|\\n:u'\*(#]
.ds d- \h'\*(#H'\(pd\h'-\w'~'u'\v'-.25m'\f2\(hy\fP\v'.25m'\h'-\*(#H'
.ds D- D\\k:\h'-\w'D'u'\v'-.11m'\z\(hy\v'.11m'\h'|\\n:u'
.ds th \*(#[\v'.3m'\s+1I\s-1\v'-.3m'\h'-(\w'I'u*2/3)'\s-1o\s+1\*(#]
.ds Th \*(#[\s+2I\s-2\h'-\w'I'u*3/5'\v'-.3m'o\v'.3m'\*(#]
.ds ae a\h'-(\w'a'u*4/10)'e
.ds Ae A\h'-(\w'A'u*4/10)'E
.    \" corrections for vroff
.if v .ds ~ \\k:\h'-(\\n(.wu*9/10-\*(#H)'\s-2\u~\d\s+2\h'|\\n:u'
.if v .ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'\v'-.4m'^\v'.4m'\h'|\\n:u'
.    \" for low resolution devices (crt and lpr)
.if \n(.H>23 .if \n(.V>19 \
\{\
.    ds : e
.    ds 8 ss
.    ds o a
.    ds d- d\h'-1'\(ga
.    ds D- D\h'-1'\(hy
.    ds th \o'bp'
.    ds Th \o'LP'
.    ds ae ae
.    ds Ae AE
.\}
.rm #[ #] #H #V #F C
.\" ========================================================================
.\"
.IX Title "BIO_find_type 3"
.TH BIO_find_type 3 "2019-12-20" "1.0.2u" "OpenSSL"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
BIO_find_type, BIO_next, BIO_method_type \- BIO chain traversal
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& #include <openssl/bio.h>
\&
\& BIO *  BIO_find_type(BIO *b,int bio_type);
\& BIO *  BIO_next(BIO *b);
\&
\& #define BIO_method_type(b)             ((b)\->method\->type)
\&
\& #define BIO_TYPE_NONE          0
\& #define BIO_TYPE_MEM           (1|0x0400)
\& #define BIO_TYPE_FILE          (2|0x0400)
\&
\& #define BIO_TYPE_FD            (4|0x0400|0x0100)
\& #define BIO_TYPE_SOCKET                (5|0x0400|0x0100)
\& #define BIO_TYPE_NULL          (6|0x0400)
\& #define BIO_TYPE_SSL           (7|0x0200)
\& #define BIO_TYPE_MD            (8|0x0200)
\& #define BIO_TYPE_BUFFER                (9|0x0200)
\& #define BIO_TYPE_CIPHER                (10|0x0200)
\& #define BIO_TYPE_BASE64                (11|0x0200)
\& #define BIO_TYPE_CONNECT       (12|0x0400|0x0100)
\& #define BIO_TYPE_ACCEPT                (13|0x0400|0x0100)
\& #define BIO_TYPE_PROXY_CLIENT  (14|0x0200)
\& #define BIO_TYPE_PROXY_SERVER  (15|0x0200)
\& #define BIO_TYPE_NBIO_TEST     (16|0x0200)
\& #define BIO_TYPE_NULL_FILTER   (17|0x0200)
\& #define BIO_TYPE_BER           (18|0x0200)
\& #define BIO_TYPE_BIO           (19|0x0400)
\&
\& #define BIO_TYPE_DESCRIPTOR    0x0100
\& #define BIO_TYPE_FILTER                0x0200
\& #define BIO_TYPE_SOURCE_SINK   0x0400
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
The \fBBIO_find_type()\fR searches for a \s-1BIO\s0 of a given type in a chain, starting
at \s-1BIO\s0 \fBb\fR. If \fBtype\fR is a specific type (such as \s-1BIO_TYPE_MEM\s0) then a search
is made for a \s-1BIO\s0 of that type. If \fBtype\fR is a general type (such as
\&\fB\s-1BIO_TYPE_SOURCE_SINK\s0\fR) then the next matching \s-1BIO\s0 of the given general type is
searched for. \fBBIO_find_type()\fR returns the next matching \s-1BIO\s0 or \s-1NULL\s0 if none is
found.
.PP
Note: not all the \fBBIO_TYPE_*\fR types above have corresponding \s-1BIO\s0 implementations.
.PP
\&\fBBIO_next()\fR returns the next \s-1BIO\s0 in a chain. It can be used to traverse all BIOs
in a chain or used in conjunction with \fBBIO_find_type()\fR to find all BIOs of a
certain type.
.PP
\&\fBBIO_method_type()\fR returns the type of a \s-1BIO.\s0
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
\&\fBBIO_find_type()\fR returns a matching \s-1BIO\s0 or \s-1NULL\s0 for no match.
.PP
\&\fBBIO_next()\fR returns the next \s-1BIO\s0 in a chain.
.PP
\&\fBBIO_method_type()\fR returns the type of the \s-1BIO\s0 \fBb\fR.
.SH "NOTES"
.IX Header "NOTES"
\&\fBBIO_next()\fR was added to OpenSSL 0.9.6 to provide a 'clean' way to traverse a \s-1BIO\s0
chain or find multiple matches using \fBBIO_find_type()\fR. Previous versions had to
use:
.PP
.Vb 1
\& next = bio\->next_bio;
.Ve
.SH "BUGS"
.IX Header "BUGS"
\&\fBBIO_find_type()\fR in OpenSSL 0.9.5a and earlier could not be safely passed a
\&\s-1NULL\s0 pointer for the \fBb\fR argument.
.SH "EXAMPLE"
.IX Header "EXAMPLE"
Traverse a chain looking for digest BIOs:
.PP
.Vb 2
\& BIO *btmp;
\& btmp = in_bio; /* in_bio is chain to search through */
\&
\& do {
\&        btmp = BIO_find_type(btmp, BIO_TYPE_MD);
\&        if(btmp == NULL) break; /* Not found */
\&        /* btmp is a digest BIO, do something with it ...*/
\&        ...
\&
\&        btmp = BIO_next(btmp);
\& } while(btmp);
.Ve
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\s-1TBA\s0

Vazgeç