enum shim_eth_llc_msg_code {
        FLOW_REQ     = 1;
        FLOW_REPLY   = 2;
        FLOW_DEALLOC = 3;
};

message shim_eth_llc_msg {
        required shim_eth_llc_msg_code code  = 1;
        optional string dst_name             = 2;
        optional string src_ae_name          = 3;
        required uint32 ssap                 = 4;
        optional uint32 dsap                 = 5;
        optional sint32 response             = 6;
};