BIO_ADDR - Online Linux Manual PageSection : 3ossl
Updated : 2022-03-15
Source : 3.0.2
Note : OpenSSL
NAMEBIO_ADDR, BIO_ADDR_new, 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
SYNOPSIS​ #include <sys/types.h> ​ #include <openssl/bio.h> ​ ​ typedef union bio_addr_st BIO_ADDR; ​ ​ BIO_ADDR *BIO_ADDR_new(void); ​ void BIO_ADDR_free(BIO_ADDR *); ​ 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);
DESCRIPTIONThe 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_free() frees a BIO_ADDR created with BIO_ADDR_new(). ​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_UNIX BIO_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_UNIX BIO_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().
RAW ADDRESSESBoth 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 struct in_addr (for AF_INET), struct in6_addr (for AF_INET6) or char * (for AF_UNIX), all depending on the protocol family the address is for.
RETURN VALUESThe 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. All other functions described here return 0 or NULL when the information they should return isn't available.
SEE ALSO​BIO_connect (3), BIO_s_connect (3)
COPYRIGHTCopyright 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 <https://www.openssl.org/source/license.html>. 0
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