forked from cory/tildefriends
Cory McWilliams
09ddfffa6b
git-svn-id: https://www.unprompted.com/svn/projects/tildefriends/trunk@4088 ed5197a5-7fde-0310-b194-c3ffbd925b24
254 lines
9.6 KiB
Groff
254 lines
9.6 KiB
Groff
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.\" ========================================================================
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.\"
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.IX Title "BIO_ADDR 3"
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.TH BIO_ADDR 3 "2020-04-21" "1.1.1g" "OpenSSL"
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.\" For nroff, turn off justification. Always turn off hyphenation; it makes
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.\" way too many mistakes in technical documents.
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.if n .ad l
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.nh
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.SH "NAME"
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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
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.SH "SYNOPSIS"
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.IX Header "SYNOPSIS"
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.Vb 2
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\& #include <sys/types.h>
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\& #include <openssl/bio.h>
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\&
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\& typedef union bio_addr_st BIO_ADDR;
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\&
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\& BIO_ADDR *BIO_ADDR_new(void);
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\& void BIO_ADDR_free(BIO_ADDR *);
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\& void BIO_ADDR_clear(BIO_ADDR *ap);
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\& int BIO_ADDR_rawmake(BIO_ADDR *ap, int family,
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\& const void *where, size_t wherelen, unsigned short port);
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\& int BIO_ADDR_family(const BIO_ADDR *ap);
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\& int BIO_ADDR_rawaddress(const BIO_ADDR *ap, void *p, size_t *l);
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\& unsigned short BIO_ADDR_rawport(const BIO_ADDR *ap);
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\& char *BIO_ADDR_hostname_string(const BIO_ADDR *ap, int numeric);
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\& char *BIO_ADDR_service_string(const BIO_ADDR *ap, int numeric);
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\& char *BIO_ADDR_path_string(const BIO_ADDR *ap);
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.Ve
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.SH "DESCRIPTION"
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.IX Header "DESCRIPTION"
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The \fB\s-1BIO_ADDR\s0\fR type is a wrapper around all types of socket
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addresses that OpenSSL deals with, currently transparently
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supporting \s-1AF_INET, AF_INET6\s0 and \s-1AF_UNIX\s0 according to what's
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available on the platform at hand.
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.PP
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\&\fBBIO_ADDR_new()\fR creates a new unfilled \fB\s-1BIO_ADDR\s0\fR, to be used
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with routines that will fill it with information, such as
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\&\fBBIO_accept_ex()\fR.
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.PP
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\&\fBBIO_ADDR_free()\fR frees a \fB\s-1BIO_ADDR\s0\fR created with \fBBIO_ADDR_new()\fR.
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.PP
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\&\fBBIO_ADDR_clear()\fR clears any data held within the provided \fB\s-1BIO_ADDR\s0\fR and sets
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it back to an uninitialised state.
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.PP
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\&\fBBIO_ADDR_rawmake()\fR takes a protocol \fBfamily\fR, an byte array of
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size \fBwherelen\fR with an address in network byte order pointed at
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by \fBwhere\fR and a port number in network byte order in \fBport\fR (except
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for the \fB\s-1AF_UNIX\s0\fR protocol family, where \fBport\fR is meaningless and
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therefore ignored) and populates the given \fB\s-1BIO_ADDR\s0\fR with them.
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In case this creates a \fB\s-1AF_UNIX\s0\fR \fB\s-1BIO_ADDR\s0\fR, \fBwherelen\fR is expected
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to be the length of the path string (not including the terminating
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\&\s-1NUL,\s0 such as the result of a call to \fBstrlen()\fR).
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\&\fIRead on about the addresses in \*(L"\s-1RAW ADDRESSES\*(R"\s0 below\fR.
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.PP
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\&\fBBIO_ADDR_family()\fR returns the protocol family of the given
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\&\fB\s-1BIO_ADDR\s0\fR. The possible non-error results are one of the
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constants \s-1AF_INET, AF_INET6\s0 and \s-1AF_UNIX.\s0 It will also return \s-1AF_UNSPEC\s0 if the
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\&\s-1BIO_ADDR\s0 has not been initialised.
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.PP
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\&\fBBIO_ADDR_rawaddress()\fR will write the raw address of the given
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\&\fB\s-1BIO_ADDR\s0\fR in the area pointed at by \fBp\fR if \fBp\fR is non-NULL,
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and will set \fB*l\fR to be the amount of bytes the raw address
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takes up if \fBl\fR is non-NULL.
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A technique to only find out the size of the address is a call
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with \fBp\fR set to \fB\s-1NULL\s0\fR. The raw address will be in network byte
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order, most significant byte first.
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In case this is a \fB\s-1AF_UNIX\s0\fR \fB\s-1BIO_ADDR\s0\fR, \fBl\fR gets the length of the
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path string (not including the terminating \s-1NUL,\s0 such as the result of
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a call to \fBstrlen()\fR).
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\&\fIRead on about the addresses in \*(L"\s-1RAW ADDRESSES\*(R"\s0 below\fR.
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.PP
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\&\fBBIO_ADDR_rawport()\fR returns the raw port of the given \fB\s-1BIO_ADDR\s0\fR.
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The raw port will be in network byte order.
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.PP
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\&\fBBIO_ADDR_hostname_string()\fR returns a character string with the
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hostname of the given \fB\s-1BIO_ADDR\s0\fR. If \fBnumeric\fR is 1, the string
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will contain the numerical form of the address. This only works for
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\&\fB\s-1BIO_ADDR\s0\fR of the protocol families \s-1AF_INET\s0 and \s-1AF_INET6.\s0 The
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returned string has been allocated on the heap and must be freed
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with \fBOPENSSL_free()\fR.
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.PP
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\&\fBBIO_ADDR_service_string()\fR returns a character string with the
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service name of the port of the given \fB\s-1BIO_ADDR\s0\fR. If \fBnumeric\fR
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is 1, the string will contain the port number. This only works
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for \fB\s-1BIO_ADDR\s0\fR of the protocol families \s-1AF_INET\s0 and \s-1AF_INET6.\s0 The
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returned string has been allocated on the heap and must be freed
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with \fBOPENSSL_free()\fR.
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.PP
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\&\fBBIO_ADDR_path_string()\fR returns a character string with the path
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of the given \fB\s-1BIO_ADDR\s0\fR. This only works for \fB\s-1BIO_ADDR\s0\fR of the
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protocol family \s-1AF_UNIX.\s0 The returned string has been allocated
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on the heap and must be freed with \fBOPENSSL_free()\fR.
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.SH "RAW ADDRESSES"
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.IX Header "RAW ADDRESSES"
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Both \fBBIO_ADDR_rawmake()\fR and \fBBIO_ADDR_rawaddress()\fR take a pointer to a
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network byte order address of a specific site. Internally, those are
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treated as a pointer to \fBstruct in_addr\fR (for \fB\s-1AF_INET\s0\fR), \fBstruct
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in6_addr\fR (for \fB\s-1AF_INET6\s0\fR) or \fBchar *\fR (for \fB\s-1AF_UNIX\s0\fR), all
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depending on the protocol family the address is for.
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.SH "RETURN VALUES"
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.IX Header "RETURN VALUES"
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The string producing functions \fBBIO_ADDR_hostname_string()\fR,
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\&\fBBIO_ADDR_service_string()\fR and \fBBIO_ADDR_path_string()\fR will
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return \fB\s-1NULL\s0\fR on error and leave an error indication on the
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OpenSSL error stack.
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.PP
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All other functions described here return 0 or \fB\s-1NULL\s0\fR when the
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information they should return isn't available.
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.SH "SEE ALSO"
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.IX Header "SEE ALSO"
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\&\fBBIO_connect\fR\|(3), \fBBIO_s_connect\fR\|(3)
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.SH "COPYRIGHT"
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.IX Header "COPYRIGHT"
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Copyright 2016 The OpenSSL Project Authors. All Rights Reserved.
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.PP
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Licensed under the OpenSSL license (the \*(L"License\*(R"). You may not use
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this file except in compliance with the License. You can obtain a copy
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in the file \s-1LICENSE\s0 in the source distribution or at
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<https://www.openssl.org/source/license.html>.
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