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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>. 1.1.1q 2022-07-05 BIO_PARSE_HOSTSERV(3)

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