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+.\" Copyright (c) 1983, 1991, 1993
+.\"	The Regents of the University of California.  All rights reserved.
+.\"
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+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
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+.\" 4. Neither the name of the University nor the names of its contributors
+.\"    may be used to endorse or promote products derived from this software
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+.\" $FreeBSD$
+.\"
+.Dd December 15, 2006
+.Dt SCTP_CONNECTX 3
+.Os
+.Sh NAME
+.Nm sctp_connectx
+.Nd connect an sctp socket with multiple destination addresses.
+.Sh LIBRARY
+.Lb libc
+.Sh SYNOPSIS
+.In sys/types.h
+.In sys/socket.h
+.In netinet/sctp.h
+.Ft int
+.Fn sctp_connectx "int s" "struct sockaddr *" "int addrcnt"
+.Sh DESCRIPTION
+The
+.Fn sctp_connectx
+call attempts to initiate an association to a peer SCTP
+endpoint. The call operates similarly to
+.Fn connect
+but it also provides the ability to specify multiple destination
+addresses for the peer. This allows a fault tolerant method
+of initiating an association. When one of the peers addresses
+is unreachable, the subsequent listed addresses will also be used
+to setup the association with the peer. 
+.Pp
+The user also needs to consider that any address listed in an 
+.Fn sctp_connectx
+call is also consider "confirmed".
+A confirmed address is one in
+which the SCTP transport will trust is a part of the association
+and it will not send a confirmation heartbeat to it with
+a random nonce. 
+.Pp
+If the peer SCTP stack does not list one or more of
+the provided addresses in its response message then 
+the extra addresses sent in the
+.Fn sctp_connectx
+call will be silently discarded from the association.
+.Sh RETURN VALUES
+The call returns 0 on success and -1 upon failure.
+.Sh ERRORS
+The
+.Fn sctp_connectx
+can return the following errors.
+.Bl -tag -width Er
+.It Bq Er EINVAL
+An address listed has an invalid family or no
+addresses were provided.
+.It Bq Er E2BIG
+The size of the address list exceeds the amount of
+data provided.
+.It Bq Er EBADF
+The argument
+.Fa s
+is not a valid descriptor.
+.It Bq Er ENOTSOCK
+The argument
+.Fa s
+is not a socket.
+.El
+.Sh SEE ALSO
+.Xr sctp 4 ,
+.Xr connect 2 ,
+