BIO_PARSE_HOSTSERV(3ossl)

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. A service name will be mapped to a port number using the system function getservbyname().

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 2016-2021 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>.