107 lines
3.7 KiB
Groff
107 lines
3.7 KiB
Groff
.\" Copyright (c) 1983, 1991, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by the University of
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.\" California, Berkeley and its contributors.
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.\" 4. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd June 19, 2007
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.Dt SCTP_CONNECTX 3
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.Os
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.Sh NAME
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.Nm sctp_connectx
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.Nd connect an SCTP socket with multiple destination addresses
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.Sh LIBRARY
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.Lb libc
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.Sh SYNOPSIS
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.In sys/types.h
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.In sys/socket.h
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.In netinet/sctp.h
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.Ft int
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.Fn sctp_connectx "int sd" "struct sockaddr *addrs" "int addrcnt" "sctp_assoc_t *id"
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.Sh DESCRIPTION
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The
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.Fn sctp_connectx
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call attempts to initiate an association to a peer SCTP
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endpoint.
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The call operates similarly to
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.Fn connect
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but it also provides the ability to specify multiple destination
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addresses for the peer.
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This allows a fault tolerant method
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of initiating an association.
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When one of the peers addresses
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is unreachable, the subsequent listed addresses will also be used
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to set up the association with the peer.
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.Pp
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The user also needs to consider that any address listed in an
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.Fn sctp_connectx
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call is also considered "confirmed".
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A confirmed address is one in
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which the SCTP transport will trust is a part of the association
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and it will not send a confirmation heartbeat to it with
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a random nonce.
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.Pp
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If the peer SCTP stack does not list one or more of
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the provided addresses in its response message then
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the extra addresses sent in the
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.Fn sctp_connectx
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call will be silently discarded from the association.
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On
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successful completion the provided
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.Fa id
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will be
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filled in with the association identification of the newly
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forming association.
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.Sh RETURN VALUES
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The call returns 0 on success and -1 upon failure.
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.Sh ERRORS
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The
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.Fn sctp_connectx
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function can return the following errors:
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.Bl -tag -width Er
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.It Bq Er EINVAL
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An address listed has an invalid family or no
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addresses were provided.
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.It Bq Er E2BIG
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The size of the address list exceeds the amount of
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data provided.
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.It Bq Er EBADF
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The argument
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.Fa s
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is not a valid descriptor.
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.It Bq Er ENOTSOCK
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The argument
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.Fa s
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is not a socket.
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.El
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.Sh SEE ALSO
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.Xr connect 2 ,
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.Xr sctp 4
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