RDMA_CM_EVENT_MULTICAST_ERROR
event->event = RDMA_CM_EVENT_MULTICAST_ERROR;
event->event = RDMA_CM_EVENT_MULTICAST_ERROR;
[RDMA_CM_EVENT_MULTICAST_ERROR] = "multicast error",
case RDMA_CM_EVENT_MULTICAST_ERROR:
case RDMA_CM_EVENT_MULTICAST_ERROR: