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_sendv(3),  sctp_send(3),  sctp_recvmsg(3), sctp_recvv(3),
       sctp_peeloff(3), sctp_getpaddrs(3), sctp_getladdrs(3), sctp_opt_info(3),

Linux 2.6                                          2005-10-25                                   SCTP_CONNECTX(3)