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<title>BIO_ADDR</title>
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<p><a name="__index__"></a></p>
<ul>
<li><a href="#name">NAME</a></li>
<li><a href="#synopsis">SYNOPSIS</a></li>
<li><a href="#description">DESCRIPTION</a></li>
<li><a href="#raw_addresses">RAW ADDRESSES</a></li>
<li><a href="#return_values">RETURN VALUES</a></li>
<li><a href="#see_also">SEE ALSO</a></li>
<li><a href="#copyright">COPYRIGHT</a></li>
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<p>
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<hr />
<h1><a name="name">NAME</a></h1>
<p>BIO_ADDR, BIO_ADDR_new, BIO_ADDR_clear, BIO_ADDR_free, BIO_ADDR_rawmake,
BIO_ADDR_family, BIO_ADDR_rawaddress, BIO_ADDR_rawport,
BIO_ADDR_hostname_string, BIO_ADDR_service_string,
BIO_ADDR_path_string - BIO_ADDR routines</p>
<p>
</p>
<hr />
<h1><a name="synopsis">SYNOPSIS</a></h1>
<pre>
#include <sys/types.h>
#include <openssl/bio.h></pre>
<pre>
typedef union bio_addr_st BIO_ADDR;</pre>
<pre>
BIO_ADDR *BIO_ADDR_new(void);
void BIO_ADDR_free(BIO_ADDR *);
void BIO_ADDR_clear(BIO_ADDR *ap);
int BIO_ADDR_rawmake(BIO_ADDR *ap, int family,
const void *where, size_t wherelen, unsigned short port);
int BIO_ADDR_family(const BIO_ADDR *ap);
int BIO_ADDR_rawaddress(const BIO_ADDR *ap, void *p, size_t *l);
unsigned short BIO_ADDR_rawport(const BIO_ADDR *ap);
char *BIO_ADDR_hostname_string(const BIO_ADDR *ap, int numeric);
char *BIO_ADDR_service_string(const BIO_ADDR *ap, int numeric);
char *BIO_ADDR_path_string(const BIO_ADDR *ap);</pre>
<p>
</p>
<hr />
<h1><a name="description">DESCRIPTION</a></h1>
<p>The <strong>BIO_ADDR</strong> type is a wrapper around all types of socket
addresses that OpenSSL deals with, currently transparently
supporting AF_INET, AF_INET6 and AF_UNIX according to what's
available on the platform at hand.</p>
<p><code>BIO_ADDR_new()</code> creates a new unfilled <strong>BIO_ADDR</strong>, to be used
with routines that will fill it with information, such as
<code>BIO_accept_ex()</code>.</p>
<p><code>BIO_ADDR_free()</code> frees a <strong>BIO_ADDR</strong> created with <code>BIO_ADDR_new()</code>.</p>
<p><code>BIO_ADDR_clear()</code> clears any data held within the provided <strong>BIO_ADDR</strong> and sets
it back to an uninitialised state.</p>
<p><code>BIO_ADDR_rawmake()</code> takes a protocol <strong>family</strong>, a byte array of
size <strong>wherelen</strong> with an address in network byte order pointed at
by <strong>where</strong> and a port number in network byte order in <strong>port</strong> (except
for the <strong>AF_UNIX</strong> protocol family, where <strong>port</strong> is meaningless and
therefore ignored) and populates the given <strong>BIO_ADDR</strong> with them.
In case this creates a <strong>AF_UNIX</strong> <strong>BIO_ADDR</strong>, <strong>wherelen</strong> is expected
to be the length of the path string (not including the terminating
NUL, such as the result of a call to strlen()).
<em>Read on about the addresses in <a href="#raw_addresses">RAW ADDRESSES</a> below</em>.</p>
<p><code>BIO_ADDR_family()</code> returns the protocol family of the given
<strong>BIO_ADDR</strong>. The possible non-error results are one of the
constants AF_INET, AF_INET6 and AF_UNIX. It will also return AF_UNSPEC if the
BIO_ADDR has not been initialised.</p>
<p><code>BIO_ADDR_rawaddress()</code> will write the raw address of the given
<strong>BIO_ADDR</strong> in the area pointed at by <strong>p</strong> if <strong>p</strong> is non-NULL,
and will set <strong>*l</strong> to be the amount of bytes the raw address
takes up if <strong>l</strong> is non-NULL.
A technique to only find out the size of the address is a call
with <strong>p</strong> set to <strong>NULL</strong>. The raw address will be in network byte
order, most significant byte first.
In case this is a <strong>AF_UNIX</strong> <strong>BIO_ADDR</strong>, <strong>l</strong> gets the length of the
path string (not including the terminating NUL, such as the result of
a call to strlen()).
<em>Read on about the addresses in <a href="#raw_addresses">RAW ADDRESSES</a> below</em>.</p>
<p><code>BIO_ADDR_rawport()</code> returns the raw port of the given <strong>BIO_ADDR</strong>.
The raw port will be in network byte order.</p>
<p><code>BIO_ADDR_hostname_string()</code> returns a character string with the
hostname of the given <strong>BIO_ADDR</strong>. If <strong>numeric</strong> is 1, the string
will contain the numerical form of the address. This only works for
<strong>BIO_ADDR</strong> of the protocol families AF_INET and AF_INET6. The
returned string has been allocated on the heap and must be freed
with <code>OPENSSL_free()</code>.</p>
<p><code>BIO_ADDR_service_string()</code> returns a character string with the
service name of the port of the given <strong>BIO_ADDR</strong>. If <strong>numeric</strong>
is 1, the string will contain the port number. This only works
for <strong>BIO_ADDR</strong> of the protocol families AF_INET and AF_INET6. The
returned string has been allocated on the heap and must be freed
with <code>OPENSSL_free()</code>.</p>
<p><code>BIO_ADDR_path_string()</code> returns a character string with the path
of the given <strong>BIO_ADDR</strong>. This only works for <strong>BIO_ADDR</strong> of the
protocol family AF_UNIX. The returned string has been allocated
on the heap and must be freed with <code>OPENSSL_free()</code>.</p>
<p>
</p>
<hr />
<h1><a name="raw_addresses">RAW ADDRESSES</a></h1>
<p>Both <code>BIO_ADDR_rawmake()</code> and <code>BIO_ADDR_rawaddress()</code> take a pointer to a
network byte order address of a specific site. Internally, those are
treated as a pointer to <strong>struct in_addr</strong> (for <strong>AF_INET</strong>), <strong>struct
in6_addr</strong> (for <strong>AF_INET6</strong>) or <strong>char *</strong> (for <strong>AF_UNIX</strong>), all
depending on the protocol family the address is for.</p>
<p>
</p>
<hr />
<h1><a name="return_values">RETURN VALUES</a></h1>
<p>The string producing functions <code>BIO_ADDR_hostname_string()</code>,
<code>BIO_ADDR_service_string()</code> and <code>BIO_ADDR_path_string()</code> will
return <strong>NULL</strong> on error and leave an error indication on the
OpenSSL error stack.</p>
<p>All other functions described here return 0 or <strong>NULL</strong> when the
information they should return isn't available.</p>
<p>
</p>
<hr />
<h1><a name="see_also">SEE ALSO</a></h1>
<p><em>BIO_connect(3)</em>, <em>BIO_s_connect(3)</em></p>
<p>
</p>
<hr />
<h1><a name="copyright">COPYRIGHT</a></h1>
<p>Copyright 2016-2020 The OpenSSL Project Authors. All Rights Reserved.</p>
<p>Licensed under the OpenSSL license (the "License"). You may not use
this file except in compliance with the License. You can obtain a copy
in the file LICENSE in the source distribution or at
<a href="https://www.openssl.org/source/license.html">https://www.openssl.org/source/license.html</a>.</p>
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