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Editing: BIO_ADDR_hostname_string.3
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Always turn off hyphenation; it makes .\" way too many mistakes in technical documents. .if n .ad l .nh .SH "NAME" BIO_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 .SH "SYNOPSIS" .IX Header "SYNOPSIS" .Vb 2 \& #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); .Ve .SH "DESCRIPTION" .IX Header "DESCRIPTION" The \fB\s-1BIO_ADDR\s0\fR type is a wrapper around all types of socket addresses that OpenSSL deals with, currently transparently supporting \s-1AF_INET, AF_INET6\s0 and \s-1AF_UNIX\s0 according to what's available on the platform at hand. .PP \&\fBBIO_ADDR_new()\fR creates a new unfilled \fB\s-1BIO_ADDR\s0\fR, to be used with routines that will fill it with information, such as \&\fBBIO_accept_ex()\fR. .PP \&\fBBIO_ADDR_free()\fR frees a \fB\s-1BIO_ADDR\s0\fR created with \fBBIO_ADDR_new()\fR. .PP \&\fBBIO_ADDR_clear()\fR clears any data held within the provided \fB\s-1BIO_ADDR\s0\fR and sets it back to an uninitialised state. .PP \&\fBBIO_ADDR_rawmake()\fR takes a protocol \fBfamily\fR, a byte array of size \fBwherelen\fR with an address in network byte order pointed at by \fBwhere\fR and a port number in network byte order in \fBport\fR (except for the \fB\s-1AF_UNIX\s0\fR protocol family, where \fBport\fR is meaningless and therefore ignored) and populates the given \fB\s-1BIO_ADDR\s0\fR with them. In case this creates a \fB\s-1AF_UNIX\s0\fR \fB\s-1BIO_ADDR\s0\fR, \fBwherelen\fR is expected to be the length of the path string (not including the terminating \&\s-1NUL,\s0 such as the result of a call to \fBstrlen()\fR). \&\fIRead on about the addresses in \*(L"\s-1RAW ADDRESSES\*(R"\s0 below\fR. .PP \&\fBBIO_ADDR_family()\fR returns the protocol family of the given \&\fB\s-1BIO_ADDR\s0\fR. The possible non-error results are one of the constants \s-1AF_INET, AF_INET6\s0 and \s-1AF_UNIX.\s0 It will also return \s-1AF_UNSPEC\s0 if the \&\s-1BIO_ADDR\s0 has not been initialised. .PP \&\fBBIO_ADDR_rawaddress()\fR will write the raw address of the given \&\fB\s-1BIO_ADDR\s0\fR in the area pointed at by \fBp\fR if \fBp\fR is non-NULL, and will set \fB*l\fR to be the amount of bytes the raw address takes up if \fBl\fR is non-NULL. A technique to only find out the size of the address is a call with \fBp\fR set to \fB\s-1NULL\s0\fR. The raw address will be in network byte order, most significant byte first. In case this is a \fB\s-1AF_UNIX\s0\fR \fB\s-1BIO_ADDR\s0\fR, \fBl\fR gets the length of the path string (not including the terminating \s-1NUL,\s0 such as the result of a call to \fBstrlen()\fR). \&\fIRead on about the addresses in \*(L"\s-1RAW ADDRESSES\*(R"\s0 below\fR. .PP \&\fBBIO_ADDR_rawport()\fR returns the raw port of the given \fB\s-1BIO_ADDR\s0\fR. The raw port will be in network byte order. .PP \&\fBBIO_ADDR_hostname_string()\fR returns a character string with the hostname of the given \fB\s-1BIO_ADDR\s0\fR. If \fBnumeric\fR is 1, the string will contain the numerical form of the address. This only works for \&\fB\s-1BIO_ADDR\s0\fR of the protocol families \s-1AF_INET\s0 and \s-1AF_INET6.\s0 The returned string has been allocated on the heap and must be freed with \fBOPENSSL_free()\fR. .PP \&\fBBIO_ADDR_service_string()\fR returns a character string with the service name of the port of the given \fB\s-1BIO_ADDR\s0\fR. If \fBnumeric\fR is 1, the string will contain the port number. This only works for \fB\s-1BIO_ADDR\s0\fR of the protocol families \s-1AF_INET\s0 and \s-1AF_INET6.\s0 The returned string has been allocated on the heap and must be freed with \fBOPENSSL_free()\fR. .PP \&\fBBIO_ADDR_path_string()\fR returns a character string with the path of the given \fB\s-1BIO_ADDR\s0\fR. This only works for \fB\s-1BIO_ADDR\s0\fR of the protocol family \s-1AF_UNIX.\s0 The returned string has been allocated on the heap and must be freed with \fBOPENSSL_free()\fR. .SH "RAW ADDRESSES" .IX Header "RAW ADDRESSES" Both \fBBIO_ADDR_rawmake()\fR and \fBBIO_ADDR_rawaddress()\fR take a pointer to a network byte order address of a specific site. Internally, those are treated as a pointer to \fBstruct in_addr\fR (for \fB\s-1AF_INET\s0\fR), \fBstruct in6_addr\fR (for \fB\s-1AF_INET6\s0\fR) or \fBchar *\fR (for \fB\s-1AF_UNIX\s0\fR), all depending on the protocol family the address is for. .SH "RETURN VALUES" .IX Header "RETURN VALUES" The string producing functions \fBBIO_ADDR_hostname_string()\fR, \&\fBBIO_ADDR_service_string()\fR and \fBBIO_ADDR_path_string()\fR will return \fB\s-1NULL\s0\fR on error and leave an error indication on the OpenSSL error stack. .PP All other functions described here return 0 or \fB\s-1NULL\s0\fR when the information they should return isn't available. .SH "SEE ALSO" .IX Header "SEE ALSO" \&\fBBIO_connect\fR\|(3), \fBBIO_s_connect\fR\|(3) .SH "COPYRIGHT" .IX Header "COPYRIGHT" Copyright 2016\-2020 The OpenSSL Project Authors. All Rights Reserved. .PP Licensed under the OpenSSL license (the \*(L"License\*(R"). You may not use this file except in compliance with the License. You can obtain a copy in the file \s-1LICENSE\s0 in the source distribution or at <https://www.openssl.org/source/license.html>.
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