af
    The address family in which the sockets are to be created. Use
    one of the following:
    o  AF_INET for the IPv4 address family
    o  AF_INET6 for the IPv6 address family
    o  TCPIP$C_AUXS or a network application server with the LISTEN
       flag enabled. Specify the TCPIP$C_AUXS address family to
       obtain the connected device socket created by the auxiliary
       server in response to incoming network traffic.
 type
    Specifies the type of sockets to be created. The socket types
    are:
    o  SOCK_STREAM - Provides sequenced, reliable, two-way,
       connection-based byte streams with an available out-of-band
       data transmission mechanism.
    o  SOCK_DGRAM - Supports datagrams (connectionless, unreliable
       data transmission mechanism).
    o  SOCK_SEQPACKET - Provides sequenced, reliable, bidirectional,
       connection-mode transmission paths for records. A record can
       be sent using one or more output operations and received using
       one or more input operations, but a single operation never
       transfers part of more than one record.
       Use the MSG_EOR flag to determine the record boundaries.
 protocol
    The protocol to be used with the socket. Normally, only a single
    protocol exists to support a particular socket type using a given
    address format. However, if many protocols exist, a particular
    protocol must be specified with this argument. Use the protocol
    number that is specific to the address family.
    If the protocol argument is 0, the function uses the default
    protocol for the specified socket type.
    If the protocol argument is non-zero, the function uses the
    default protocol for the address family.
 socket_vector
    A 2-integer array to hold the file descriptors of the created
    socket pair.