enum shim_eth_llc_msg_code {
        FLOW_REQ         = 1;
        FLOW_REPLY       = 2;
        NAME_QUERY_REQ   = 3;
        NAME_QUERY_REPLY = 4;
};

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