BIO_ADDR, BIO_ADDR_new, BIO_ADDR_copy, BIO_ADDR_dup, BIO_ADDR_clear, BIO_ADDR_free, BIO_ADDR_rawmake,

       Copyright 2016-2024 The OpenSSL Project Authors. All Rights Reserved.

       Licensed under the Apache License 2.0 (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
       <https://www.openssl.org/source/license.html>.

3.5.0                                              2025-06-04                                     BIO_ADDR(3SSL)

       The BIO_ADDR 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.

       BIO_ADDR_new() creates a new unfilled BIO_ADDR, to be used with routines that will fill it with
       information, such as BIO_accept_ex().

       BIO_ADDR_copy() copies the contents of src into dst. Neither src or dst can be NULL.

       BIO_ADDR_dup() creates a new BIO_ADDR, with a copy of the address data in ap.

       BIO_ADDR_free() frees a BIO_ADDR created with BIO_ADDR_new() or BIO_ADDR_dup(). If the argument is NULL,
       nothing is done.

       BIO_ADDR_clear() clears any data held within the provided BIO_ADDR and sets it back to an uninitialised
       state.

       BIO_ADDR_rawmake() takes a protocol family, a byte array of size wherelen with an address in network byte
       order pointed at by where and a port number in network byte order in port (except for the AF_UNIX
       protocol family, where port is meaningless and therefore ignored) and populates the given BIO_ADDR with
       them.  In case this creates a AF_UNIXBIO_ADDR, wherelen is expected to be the length of the path string
       (not including the terminating NUL, such as the result of a call to strlen()).  Read on about the
       addresses in "RAW ADDRESSES" below.

       BIO_ADDR_family() returns the protocol family of the given BIO_ADDR.  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.

       BIO_ADDR_rawaddress() will write the raw address of the given BIO_ADDR in the area pointed at by p if p
       is non-NULL, and will set *l to be the amount of bytes the raw address takes up if l is non-NULL.  A
       technique to only find out the size of the address is a call with p set to NULL.  The raw address will be
       in network byte order, most significant byte first.  In case this is a AF_UNIXBIO_ADDR, l gets the
       length of the path string (not including the terminating NUL, such as the result of a call to strlen()).
       Read on about the addresses in "RAW ADDRESSES" below.

       BIO_ADDR_rawport() returns the raw port of the given BIO_ADDR.  The raw port will be in network byte
       order.

       BIO_ADDR_hostname_string() returns a character string with the hostname of the given BIO_ADDR.  If
       numeric is 1, the string will contain the numerical form of the address.  This only works for BIO_ADDR of
       the protocol families AF_INET and AF_INET6.  The returned string has been allocated on the heap and must
       be freed with OPENSSL_free().

       BIO_ADDR_service_string() returns a character string with the service name of the port of the given
       BIO_ADDR.  If numeric is 1, the string will contain the port number.  This only works for BIO_ADDR of the
       protocol families AF_INET and AF_INET6.  The returned string has been allocated on the heap and must be
       freed with OPENSSL_free().

       BIO_ADDR_path_string() returns a character string with the path of the given BIO_ADDR.  This only works
       for BIO_ADDR of the protocol family AF_UNIX.  The returned string has been allocated on the heap and must
       be freed with OPENSSL_free().

BIO_ADDR_copy() and BIO_ADDR_dup() were added in OpenSSL 3.2.

       BIO_ADDR, BIO_ADDR_new, BIO_ADDR_copy, BIO_ADDR_dup, 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

       Both BIO_ADDR_rawmake() and BIO_ADDR_rawaddress() take a pointer to a network byte order address of a
       specific site.  Internally, those are treated as a pointer to structin_addr (for AF_INET), structin6_addr (for AF_INET6) or char* (for AF_UNIX), all depending on the protocol family the address is for.

       The string producing functions BIO_ADDR_hostname_string(), BIO_ADDR_service_string() and
       BIO_ADDR_path_string() will return NULL on error and leave an error indication on the OpenSSL error
       stack.

       BIO_ADDR_copy() returns 1 on success or 0 on error.

       All other functions described here return 0 or NULL when the information they should return isn't
       available.

BIO_connect(3), BIO_s_connect(3)

        #include <sys/types.h>
        #include <openssl/bio.h>

        typedef union bio_addr_st BIO_ADDR;

        BIO_ADDR *BIO_ADDR_new(void);
        int BIO_ADDR_copy(BIO_ADDR *dst, const BIO_ADDR *src);
        BIO_ADDR *BIO_ADDR_dup(const BIO_ADDR *ap);
        void BIO_ADDR_free(BIO_ADDR *ap);
        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);