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SCTP_CONNECTX(3) FreeBSD 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:
[EINVAL] An address listed has an invalid family or no
addresses were provided.
[E2BIG] The size of the address list exceeds the amount of
data provided.
[EBADF] The argument s is not a valid descriptor.
[ENOTSOCK] The argument s is not a socket.
SEE ALSO
connect(2), sctp(4)
FreeBSD 14.0-RELEASE-p11 June 19, 2007 FreeBSD 14.0-RELEASE-p11