1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
|
.\" Automatically generated by Pod::Man 4.14 (Pod::Simple 3.43)
.\"
.\" 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_ADDRINFO 3"
.TH BIO_ADDRINFO 3 "2022-05-03" "1.1.1o" "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_lookup_type, BIO_ADDRINFO, BIO_ADDRINFO_next, BIO_ADDRINFO_free, BIO_ADDRINFO_family, BIO_ADDRINFO_socktype, BIO_ADDRINFO_protocol, BIO_ADDRINFO_address, BIO_lookup_ex, BIO_lookup \&\- BIO_ADDRINFO type and routines
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 2
\& #include <sys/types.h>
\& #include <openssl/bio.h>
\&
\& typedef union bio_addrinfo_st BIO_ADDRINFO;
\&
\& enum BIO_lookup_type {
\& BIO_LOOKUP_CLIENT, BIO_LOOKUP_SERVER
\& };
\&
\& int BIO_lookup_ex(const char *host, const char *service, int lookup_type,
\& int family, int socktype, int protocol, BIO_ADDRINFO **res);
\& int BIO_lookup(const char *node, const char *service,
\& enum BIO_lookup_type lookup_type,
\& int family, int socktype, BIO_ADDRINFO **res);
\&
\& const BIO_ADDRINFO *BIO_ADDRINFO_next(const BIO_ADDRINFO *bai);
\& int BIO_ADDRINFO_family(const BIO_ADDRINFO *bai);
\& int BIO_ADDRINFO_socktype(const BIO_ADDRINFO *bai);
\& int BIO_ADDRINFO_protocol(const BIO_ADDRINFO *bai);
\& const BIO_ADDR *BIO_ADDRINFO_address(const BIO_ADDRINFO *bai);
\& void BIO_ADDRINFO_free(BIO_ADDRINFO *bai);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
The \fB\s-1BIO_ADDRINFO\s0\fR type is a wrapper for address information
types provided on your platform.
.PP
\&\fB\s-1BIO_ADDRINFO\s0\fR normally forms a chain of several that can be
picked at one by one.
.PP
\&\fBBIO_lookup_ex()\fR looks up a specified \fBhost\fR and \fBservice\fR, and
uses \fBlookup_type\fR to determine what the default address should
be if \fBhost\fR is \fB\s-1NULL\s0\fR. \fBfamily\fR, \fBsocktype\fR and \fBprotocol\fR are used to
determine what protocol family, socket type and protocol should be used for
the lookup. \fBfamily\fR can be any of \s-1AF_INET, AF_INET6, AF_UNIX\s0 and
\&\s-1AF_UNSPEC.\s0 \fBsocktype\fR can be \s-1SOCK_STREAM, SOCK_DGRAM\s0 or 0. Specifying 0
indicates that any type can be used. \fBprotocol\fR specifies a protocol such as
\&\s-1IPPROTO_TCP, IPPROTO_UDP\s0 or \s-1IPPORTO_SCTP.\s0 If set to 0 than any protocol can be
used. \fBres\fR points at a pointer to hold the start of a \fB\s-1BIO_ADDRINFO\s0\fR
chain.
.PP
For the family \fB\s-1AF_UNIX\s0\fR, \fBBIO_lookup_ex()\fR will ignore the \fBservice\fR
parameter and expects the \fBnode\fR parameter to hold the path to the
socket file.
.PP
\&\fBBIO_lookup()\fR does the same as \fBBIO_lookup_ex()\fR but does not provide the ability
to select based on the protocol (any protocol may be returned).
.PP
\&\fBBIO_ADDRINFO_family()\fR returns the family of the given
\&\fB\s-1BIO_ADDRINFO\s0\fR. The result will be one of the constants
\&\s-1AF_INET, AF_INET6\s0 and \s-1AF_UNIX.\s0
.PP
\&\fBBIO_ADDRINFO_socktype()\fR returns the socket type of the given
\&\fB\s-1BIO_ADDRINFO\s0\fR. The result will be one of the constants
\&\s-1SOCK_STREAM\s0 and \s-1SOCK_DGRAM.\s0
.PP
\&\fBBIO_ADDRINFO_protocol()\fR returns the protocol id of the given
\&\fB\s-1BIO_ADDRINFO\s0\fR. The result will be one of the constants
\&\s-1IPPROTO_TCP\s0 and \s-1IPPROTO_UDP.\s0
.PP
\&\fBBIO_ADDRINFO_address()\fR returns the underlying \fB\s-1BIO_ADDR\s0\fR
of the given \fB\s-1BIO_ADDRINFO\s0\fR.
.PP
\&\fBBIO_ADDRINFO_next()\fR returns the next \fB\s-1BIO_ADDRINFO\s0\fR in the chain
from the given one.
.PP
\&\fBBIO_ADDRINFO_free()\fR frees the chain of \fB\s-1BIO_ADDRINFO\s0\fR starting
with the given one.
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
\&\fBBIO_lookup_ex()\fR and \fBBIO_lookup()\fR return 1 on success and 0 when an error
occurred, and will leave an error indication on the OpenSSL error stack in that
case.
.PP
All other functions described here return 0 or \fB\s-1NULL\s0\fR when the
information they should return isn't available.
.SH "NOTES"
.IX Header "NOTES"
The \fBBIO_lookup_ex()\fR implementation uses the platform provided \fBgetaddrinfo()\fR
function. On Linux it is known that specifying 0 for the protocol will not
return any \s-1SCTP\s0 based addresses when calling \fBgetaddrinfo()\fR. Therefore, if an \s-1SCTP\s0
address is required then the \fBprotocol\fR parameter to \fBBIO_lookup_ex()\fR should be
explicitly set to \s-1IPPROTO_SCTP.\s0 The same may be true on other platforms.
.SH "HISTORY"
.IX Header "HISTORY"
The \fBBIO_lookup_ex()\fR function was added in OpenSSL 1.1.1.
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2016\-2020 The OpenSSL Project Authors. All Rights Reserved.
.PP
Licensed under the OpenSSL license (the \*(L"License\*(R"). You may not use
this file except in compliance with the License. You can obtain a copy
in the file \s-1LICENSE\s0 in the source distribution or at
<https://www.openssl.org/source/license.html>.
|
