mirror of
https://github.com/openssl/openssl.git
synced 2024-12-15 06:01:37 +08:00
d318fc9545
Reviewed-by: Tomas Mraz <tomas@openssl.org> (Merged from https://github.com/openssl/openssl/pull/15417)
114 lines
4.0 KiB
Plaintext
114 lines
4.0 KiB
Plaintext
=pod
|
|
|
|
=head1 NAME
|
|
|
|
BIO_lookup_type,
|
|
BIO_ADDRINFO, BIO_ADDRINFO_next, BIO_ADDRINFO_free,
|
|
BIO_ADDRINFO_family, BIO_ADDRINFO_socktype, BIO_ADDRINFO_protocol,
|
|
BIO_ADDRINFO_address,
|
|
BIO_lookup_ex,
|
|
BIO_lookup
|
|
- BIO_ADDRINFO type and routines
|
|
|
|
=head1 SYNOPSIS
|
|
|
|
#include <sys/types.h>
|
|
#include <openssl/bio.h>
|
|
|
|
typedef union bio_addrinfo_st BIO_ADDRINFO;
|
|
|
|
enum BIO_lookup_type {
|
|
BIO_LOOKUP_CLIENT, BIO_LOOKUP_SERVER
|
|
};
|
|
|
|
int BIO_lookup_ex(const char *host, const char *service, int lookup_type,
|
|
int family, int socktype, int protocol, BIO_ADDRINFO **res);
|
|
int BIO_lookup(const char *host, const char *service,
|
|
enum BIO_lookup_type lookup_type,
|
|
int family, int socktype, BIO_ADDRINFO **res);
|
|
|
|
const BIO_ADDRINFO *BIO_ADDRINFO_next(const BIO_ADDRINFO *bai);
|
|
int BIO_ADDRINFO_family(const BIO_ADDRINFO *bai);
|
|
int BIO_ADDRINFO_socktype(const BIO_ADDRINFO *bai);
|
|
int BIO_ADDRINFO_protocol(const BIO_ADDRINFO *bai);
|
|
const BIO_ADDR *BIO_ADDRINFO_address(const BIO_ADDRINFO *bai);
|
|
void BIO_ADDRINFO_free(BIO_ADDRINFO *bai);
|
|
|
|
=head1 DESCRIPTION
|
|
|
|
The B<BIO_ADDRINFO> type is a wrapper for address information
|
|
types provided on your platform.
|
|
|
|
B<BIO_ADDRINFO> normally forms a chain of several that can be
|
|
picked at one by one.
|
|
|
|
BIO_lookup_ex() looks up a specified B<host> and B<service>, and
|
|
uses B<lookup_type> to determine what the default address should
|
|
be if B<host> is B<NULL>. B<family>, B<socktype> and B<protocol> are used to
|
|
determine what protocol family, socket type and protocol should be used for
|
|
the lookup. B<family> can be any of AF_INET, AF_INET6, AF_UNIX and
|
|
AF_UNSPEC. B<socktype> can be SOCK_STREAM, SOCK_DGRAM or 0. Specifying 0
|
|
indicates that any type can be used. B<protocol> specifies a protocol such as
|
|
IPPROTO_TCP, IPPROTO_UDP or IPPORTO_SCTP. If set to 0 than any protocol can be
|
|
used. B<res> points at a pointer to hold the start of a B<BIO_ADDRINFO>
|
|
chain.
|
|
|
|
For the family B<AF_UNIX>, BIO_lookup_ex() will ignore the B<service>
|
|
parameter and expects the B<host> parameter to hold the path to the socket file.
|
|
|
|
BIO_lookup() does the same as BIO_lookup_ex() but does not provide the ability
|
|
to select based on the protocol (any protocol may be returned).
|
|
|
|
BIO_ADDRINFO_family() returns the family of the given
|
|
B<BIO_ADDRINFO>. The result will be one of the constants
|
|
AF_INET, AF_INET6 and AF_UNIX.
|
|
|
|
BIO_ADDRINFO_socktype() returns the socket type of the given
|
|
B<BIO_ADDRINFO>. The result will be one of the constants
|
|
SOCK_STREAM and SOCK_DGRAM.
|
|
|
|
BIO_ADDRINFO_protocol() returns the protocol id of the given
|
|
B<BIO_ADDRINFO>. The result will be one of the constants
|
|
IPPROTO_TCP and IPPROTO_UDP.
|
|
|
|
BIO_ADDRINFO_address() returns the underlying B<BIO_ADDR>
|
|
of the given B<BIO_ADDRINFO>.
|
|
|
|
BIO_ADDRINFO_next() returns the next B<BIO_ADDRINFO> in the chain
|
|
from the given one.
|
|
|
|
BIO_ADDRINFO_free() frees the chain of B<BIO_ADDRINFO> starting
|
|
with the given one.
|
|
|
|
=head1 RETURN VALUES
|
|
|
|
BIO_lookup_ex() and BIO_lookup() return 1 on success and 0 when an error
|
|
occurred, and will leave an error indication on the OpenSSL error stack in that
|
|
case.
|
|
|
|
All other functions described here return 0 or B<NULL> when the
|
|
information they should return isn't available.
|
|
|
|
=head1 NOTES
|
|
|
|
The BIO_lookup_ex() implementation uses the platform provided getaddrinfo()
|
|
function. On Linux it is known that specifying 0 for the protocol will not
|
|
return any SCTP based addresses when calling getaddrinfo(). Therefore, if an SCTP
|
|
address is required then the B<protocol> parameter to BIO_lookup_ex() should be
|
|
explicitly set to IPPROTO_SCTP. The same may be true on other platforms.
|
|
|
|
=head1 HISTORY
|
|
|
|
The BIO_lookup_ex() function was added in OpenSSL 1.1.1.
|
|
|
|
=head1 COPYRIGHT
|
|
|
|
Copyright 2016-2020 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
|
|
L<https://www.openssl.org/source/license.html>.
|
|
|
|
=cut
|