SCTP_CONNECTX(3)					     Linux Programmer's Manual						  SCTP_CONNECTX(3)

NAME

       sctp_connectx - initiate a connection on an SCTP socket using multiple destination addresses.

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

       sctp_connectx  initiates  a  connection	to  a  set of addresses passed in the array addrs to/from the socket sd.  addrcnt is the number of
       addresses in the array.

       If sd is an IPv4 socket, the addresses passed must be IPv4 addresses. If sd is an IPv6 socket, the addresses passed can be either  IPv4	or
       IPv6 addresses.

       addrs  is  a  pointer to an array of one or more socket addresses. Each address is contained in its appropriate structure(i.e. struct sock-
       addr_in or struct sockaddr_in6). The family of the address type must be used to distinguish the address length. The  caller  specifies  the
       number of addresses in the array with addrcnt.

       id is a pointer to the association id and, if provided, will be set to the identifier of the newly created association.

RETURN VALUE

       On success, 0 is returned. On failure, -1 is returned, and errno is set appropriately.

ERRORS

       EBADF  sd is not a valid descriptor.

       ENOTSOCK
	      sd is a descriptor for a file, not a socket.

       EFAULT Error while copying in or out from the user address space.

       EINVAL Invalid port or address.

       EACCES The address is protected, and the user is not the super-user.

       EISCONN
	      The socket is already connected.

       ECONNREFUSED
	      No one listening on the remote address.

       ETIMEDOUT
	      Timeout  while attempting connection. The server may be too busy to accept new connections. Note that for IP sockets the timeout may
	      be very long when syncookies are enabled on the server.

       ENETUNREACH
	      Network is unreachable.

       EADDRINUSE
	      Local address is already in use.

       EINPROGRESS
	      The socket is non-blocking and the connection cannot be completed immediately.  It is possible to select(2) or poll(2)  for  comple-
	      tion by selecting the socket for writing. After select indicates writability, use getsockopt(2) to read the SO_ERROR option at level
	      SOL_SOCKET to determine whether connect completed successfully (SO_ERROR is zero) or unsuccessfully (SO_ERROR is one  of	the  usual
	      error codes listed here, explaining the reason for the failure).

       EALREADY
	      The socket is non-blocking and a previous connection attempt has not yet been completed.

       EAGAIN No  more	free  local ports or insufficient entries in the routing cache. For PF_INET see the net.ipv4.ip_local_port_range sysctl in
	      ip(7) on how to increase the number of local ports.

       EAFNOSUPPORT
	      The passed address didn't have the correct address family in its sa_family field.

       EACCES, EPERM
	      The user tried to connect to a broadcast address without having the socket broadcast flag enabled or the connection  request  failed
	      because of a local firewall rule.

SEE ALSO

       sctp(7)	 sctp_bindx(3),   sctp_sendmsg(3),   sctp_send(3),   sctp_recvmsg(3),	sctp_peeloff(3),   sctp_getpaddrs(3),	sctp_getladdrs(3),
       sctp_opt_info(3),

Linux 2.6							    2005-10-25							  SCTP_CONNECTX(3)