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SCTP_CONNECTX(3)           Library Functions Manual           SCTP_CONNECTX(3)

NAME
     sctp_connectx - connect an SCTP socket with multiple destination
     addresses

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #include <sys/types.h>
     #include <sys/socket.h>
     #include <netinet/sctp.h>

     int
     sctp_connectx(int sd, struct sockaddr *addrs, int addrcnt,
         sctp_assoc_t *id);

DESCRIPTION
     The sctp_connectx() call attempts to initiate an association to a peer
     SCTP endpoint.  The call operates similarly to 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 set up the association with the peer.

     The user also needs to consider that any address listed in an
     sctp_connectx() call is also considered "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.

     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
     sctp_connectx() call will be silently discarded from the association.  On
     successful completion the provided id will be filled in with the
     association identification of the newly forming association.

RETURN VALUES
     The call returns 0 on success and -1 upon failure.

ERRORS
     The sctp_connectx() function can return the following errors:

     [E2BIG]            The size of the address list exceeds the amount of
                        data provided.

     [EBADF]            The argument s is not a valid descriptor.

     [EINVAL]           An address listed has an invalid family or no
                        addresses were provided.

     [ENOTSOCK]         The argument s is not a socket.

SEE ALSO
     connect(2), sctp(4)

     Sockets API Extensions for the Stream Control Transmission Protocol
     (SCTP), RFC, 6458, December 2011.

HISTORY
     This function first appeared in NetBSD 9.0.

NetBSD 10.99                    August 1, 2018                    NetBSD 10.99