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.\" ========================================================================
.\"
.IX Title "BIO_PARSE_HOSTSERV 3"
.TH BIO_PARSE_HOSTSERV 3 "2023-09-11" "1.1.1w" "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_hostserv_priorities, BIO_parse_hostserv \&\- utility routines to parse a standard host and service string
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& #include <openssl/bio.h>
\&
\& enum BIO_hostserv_priorities {
\&     BIO_PARSE_PRIO_HOST, BIO_PARSE_PRIO_SERV
\& };
\& int BIO_parse_hostserv(const char *hostserv, char **host, char **service,
\&                        enum BIO_hostserv_priorities hostserv_prio);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
\&\fBBIO_parse_hostserv()\fR will parse the information given in \fBhostserv\fR,
create strings with the hostname and service name and give those
back via \fBhost\fR and \fBservice\fR.  Those will need to be freed after
they are used.  \fBhostserv_prio\fR helps determine if \fBhostserv\fR shall
be interpreted primarily as a hostname or a service name in ambiguous
cases.
.PP
The syntax the \fBBIO_parse_hostserv()\fR recognises is:
.PP
.Vb 7
\& host + \*(Aq:\*(Aq + service
\& host + \*(Aq:\*(Aq + \*(Aq*\*(Aq
\& host + \*(Aq:\*(Aq
\&        \*(Aq:\*(Aq + service
\& \*(Aq*\*(Aq  + \*(Aq:\*(Aq + service
\& host
\& service
.Ve
.PP
The host part can be a name or an \s-1IP\s0 address.  If it's a IPv6
address, it \s-1MUST\s0 be enclosed in brackets, such as '[::1]'.
.PP
The service part can  be a service name or its port number.
.PP
The returned values will depend on the given \fBhostserv\fR string
and \fBhostserv_prio\fR, as follows:
.PP
.Vb 5
\& host + \*(Aq:\*(Aq + service  => *host = "host", *service = "service"
\& host + \*(Aq:\*(Aq + \*(Aq*\*(Aq      => *host = "host", *service = NULL
\& host + \*(Aq:\*(Aq            => *host = "host", *service = NULL
\&        \*(Aq:\*(Aq + service  => *host = NULL, *service = "service"
\&  \*(Aq*\*(Aq + \*(Aq:\*(Aq + service  => *host = NULL, *service = "service"
\&
\& in case no \*(Aq:\*(Aq is present in the string, the result depends on
\& hostserv_prio, as follows:
\&
\& when hostserv_prio == BIO_PARSE_PRIO_HOST
\& host                 => *host = "host", *service untouched
\&
\& when hostserv_prio == BIO_PARSE_PRIO_SERV
\& service              => *host untouched, *service = "service"
.Ve
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
\&\fBBIO_parse_hostserv()\fR returns 1 on success or 0 on error.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\s-1\fBBIO_ADDRINFO\s0\fR\|(3)
.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>.