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gcontini

2020-03-21 b939d1a0b6b375ea5bae54d83a1cb89eb888c75a

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/*
 * default_strategy.cpp
 *
 *  Created on: Jan 1, 2020
 *      Author: devel
 */
 
#include <vector>
#include "../os/execution_environment.hpp"
#include "default_strategy.hpp"
 
using namespace std;
namespace license {
namespace hw_identifier {
 
static vector<LCC_API_HW_IDENTIFICATION_STRATEGY> available_strategies() {
    os::ExecutionEnvironment exec;
    os::VIRTUALIZATION virtualization = exec.getVirtualization();
    vector<LCC_API_HW_IDENTIFICATION_STRATEGY> strategy_to_try;
    if (virtualization == os::CONTAINER) {
        if (exec.is_docker()) {
            strategy_to_try = LCC_DOCKER_STRATEGIES;
        } else {
            strategy_to_try = LCC_LXC_STRATEGIES;
        }
    } else if (virtualization == os::VM) {
        if (exec.is_cloud()) {
            strategy_to_try = LCC_CLOUD_STRATEGIES;
        } else {
            strategy_to_try = LCC_VM_STRATEGIES;
        }
    } else {
        strategy_to_try = LCC_BARE_TO_METAL_STRATEGIES;
    }
    return strategy_to_try;
}
 
DefaultStrategy::DefaultStrategy() {}
 
DefaultStrategy::~DefaultStrategy() {}
 
LCC_API_HW_IDENTIFICATION_STRATEGY DefaultStrategy::identification_strategy() const { return STRATEGY_DEFAULT; }
 
FUNCTION_RETURN DefaultStrategy::generate_pc_id(HwIdentifier& pc_id) const {
    vector<LCC_API_HW_IDENTIFICATION_STRATEGY> strategy_to_try = available_strategies();
    FUNCTION_RETURN ret = FUNC_RET_NOT_AVAIL;
    for (auto it : strategy_to_try) {
        LCC_API_HW_IDENTIFICATION_STRATEGY strat_to_try = it;
        unique_ptr<IdentificationStrategy> strategy_ptr = IdentificationStrategy::get_strategy(strat_to_try);
        ret = strategy_ptr->generate_pc_id(pc_id);
        if (ret == FUNC_RET_OK) {
            break;
        }
    }
    return ret;
}
 
std::vector<HwIdentifier> DefaultStrategy::alternative_ids() const {
    vector<LCC_API_HW_IDENTIFICATION_STRATEGY> strategy_to_try = available_strategies();
    vector<HwIdentifier> identifiers;
    FUNCTION_RETURN ret = FUNC_RET_NOT_AVAIL;
    for (auto it : strategy_to_try) {
        LCC_API_HW_IDENTIFICATION_STRATEGY strat_to_try = it;
        unique_ptr<IdentificationStrategy> strategy_ptr = IdentificationStrategy::get_strategy(strat_to_try);
        vector<HwIdentifier> alt_ids = strategy_ptr->alternative_ids();
        identifiers.insert(alt_ids.begin(), alt_ids.end(), identifiers.end());
    }
    return identifiers;
}
 
LCC_EVENT_TYPE DefaultStrategy::validate_identifier(const HwIdentifier& identifier) const {
    // default strategy should always realize itself as a concrete strategy
    return IDENTIFIERS_MISMATCH;
}
 
}  // namespace hw_identifier
} /* namespace license */