VM_NICINFO_CMD
nic_info_size = vmt_xdr_nic_info(NULL) + sizeof(VM_NICINFO_CMD) - 1;
strncpy(nic_info, VM_NICINFO_CMD, nic_info_size);
vmt_xdr_nic_info(nic_info + sizeof(VM_NICINFO_CMD) - 1);