int rdma_get_request(struct rdma_cm_id *listen,struct rdma_cm_id **id);
rdma_cm_id associated with the new connection.
Retrieves a connection request event. If no requests are pending,
the call will block until an event is received.
Returns 0 on success, or -1 on error. If an error occurs, errno will be
set to indicate the failure reason.
This call may only be used on listening rdma_cm_id's operating
synchronously. On success, a new rdma_cm_id representing the
connection request will be returned to the user. The new rdma_cm_id
will reference event information associated with the request until
the user calls rdma_reject, rdma_accept, or rdma_destroy_id on the
newly created identifier. For a description of the event data,
If QP attributes are associated with the listening endpoint, the
returned rdma_cm_id will also reference an allocated QP.