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BIO(3)		      DragonFly Library Functions Manual		BIO(3)


NAME

     BIO -- I/O abstraction


SYNOPSIS

     #include <openssl/bio.h>


DESCRIPTION

     A BIO is an I/O abstraction, it hides many of the underlying I/O details
     from an application.  If an application uses a BIO for its I/O, it can
     transparently handle SSL connections, unencrypted network connections and
     file I/O.

     There are two types of BIO, a source/sink BIO and a filter BIO.

     As its name implies, a source/sink BIO is a source and/or sink of data,
     examples include a socket BIO and a file BIO.

     A filter BIO takes data from one BIO and passes it through to another, or
     to the application.  The data may be left unmodified (for example a mes-
     sage digest BIO) or translated (for example an encryption BIO).  The
     effect of a filter BIO may change according to the I/O operation it is
     performing: for example an encryption BIO will encrypt data if it is
     being written to and decrypt data if it is being read from.

     BIOs can be joined together to form a chain (a single BIO is a chain with
     one component).  A chain normally consist of one source/sink BIO and one
     or more filter BIOs.  Data read from or written to the first BIO then
     traverses the chain to the end (normally a source/sink BIO).


SEE ALSO

     BIO_ctrl(3), BIO_f_base64(3), BIO_f_buffer(3), BIO_f_cipher(3),
     BIO_f_md(3), BIO_f_null(3), BIO_f_ssl(3), BIO_find_type(3), BIO_new(3),
     BIO_new_bio_pair(3), BIO_push(3), BIO_read(3), BIO_s_accept(3),
     BIO_s_bio(3), BIO_s_connect(3), BIO_s_fd(3), BIO_s_file(3), BIO_s_mem(3),
     BIO_s_null(3), BIO_s_socket(3), BIO_set_callback(3), BIO_should_retry(3)

DragonFly 4.7			 July 17, 2014			 DragonFly 4.7
BIO_PARSE_HOSTSERV(3)               OpenSSL              BIO_PARSE_HOSTSERV(3)


NAME

       BIO_hostserv_priorities, BIO_parse_hostserv - utility routines to parse
       a standard host and service string


SYNOPSIS

        #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);


DESCRIPTION

       BIO_parse_hostserv() will parse the information given in hostserv,
       create strings with the hostname and service name and give those back
       via host and service.  Those will need to be freed after they are used.
       hostserv_prio helps determine if hostserv shall be interpreted
       primarily as a hostname or a service name in ambiguous cases.

       The syntax the BIO_parse_hostserv() recognises is:

        host + ':' + service
        host + ':' + '*'
        host + ':'
               ':' + service
        '*'  + ':' + service
        host
        service

       The host part can be a name or an IP address.  If it's a IPv6 address,
       it MUST be enclosed in brackets, such as '[::1]'.

       The service part can  be a service name or its port number.

       The returned values will depend on the given hostserv string and
       hostserv_prio, as follows:

        host + ':' + service  => *host = "host", *service = "service"
        host + ':' + '*'      => *host = "host", *service = NULL
        host + ':'            => *host = "host", *service = NULL
               ':' + service  => *host = NULL, *service = "service"
         '*' + ':' + service  => *host = NULL, *service = "service"

        in case no ':' 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"


RETURN VALUES

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


SEE ALSO

       BIO_ADDRINFO(3)


COPYRIGHT

       Copyright 2016-2020 The OpenSSL Project Authors. All Rights Reserved.

       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
       <https://www.openssl.org/source/license.html>.

1.1.1v                            2023-08-01             BIO_PARSE_HOSTSERV(3)

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