struct rdma_cm_event *event;

while (rdma_get_cm_event(event_channel, &event) == 0) {

    switch (event->event) {
        case RDMA_CM_EVENT_ADDR_RESOLVED:
            // Create QP, receive CQ, and send CQ. 
            // Call rdma_resolve_route()
            // State: STARTED
        case RDMA_CM_EVENT_ADDR_ERROR:
            // Try fallback and set mode rdma_cm_id to listening
            // State: STARTED
        case RDMA_CM_EVENT_ROUTE_RESOLVED:
            // Call rdma_connect()
            // State: PENDING_CONNECT
        case RDMA_CM_EVENT_ROUTE_ERROR:
            // Try fallback and set mode rdma_cm_id to listening
            // State: STARTED
        case RDMA_CM_EVENT_UNREACHABLE:
            // Try fallback and set mode rdma_cm_id to listening
            // State: STARTED
        case RDMA_CM_EVENT_CONNECT_REQUEST:
            // Create QP, receive CQ, and send CQ. 
            // Call rdma_accept()
            // State: PENDING_CONNECT
        case RDMA_CM_EVENT_CONNECT_ERROR:
            // Try fallback and set mode rdma_cm_id to listening
            // State: STARTED
        case RDMA_CM_EVENT_REJECTED:
            // Try fallback and set mode rdma_cm_id to listening
            // State: STARTED
        case RDMA_CM_EVENT_ESTABLISHED:
            // In case of UD, save address handle from event struct
            // State: CONNECTED
        case RDMA_CM_EVENT_DISCONNECTED:
            // Release all buffers and destroy everything
            // State: STARTED
        case RDMA_CM_EVENT_TIMEWAIT_EXIT:
            break;
        default:
            // Error message: unkown event
    }

    rdma_ack_cm_event(event);
}