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 sockaddr_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 completion 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),