Merge branch 'feature/pc_identifiers' into develop issues #2 #3 #14 #49

Gabriele Contini

2020-03-15 36ce07093b68b07513149577c209ae7a57ab356b

 src/library/hw_identifier/default_strategy.cpp

New file
@@ -0,0 +1,77 @@
/*
 * 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_IDENTIFICATION_STRATEGY> available_strategies() {
   os::ExecutionEnvironment exec;
   os::VIRTUALIZATION virtualization = exec.getVirtualization();
   vector<LCC_API_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_IDENTIFICATION_STRATEGY DefaultStrategy::identification_strategy() const { return STRATEGY_DEFAULT; }

FUNCTION_RETURN DefaultStrategy::identify_pc(HwIdentifier& pc_id) const {
   vector<LCC_API_IDENTIFICATION_STRATEGY> strategy_to_try = available_strategies();
   FUNCTION_RETURN ret = FUNC_RET_NOT_AVAIL;
   for (auto it : strategy_to_try) {
      LCC_API_IDENTIFICATION_STRATEGY strat_to_try = it;
      unique_ptr<IdentificationStrategy> strategy_ptr = IdentificationStrategy::get_strategy(strat_to_try);
      ret = strategy_ptr->identify_pc(pc_id);
      if (ret == FUNC_RET_OK) {
         break;
      }
   }
   return ret;
}

std::vector<HwIdentifier> DefaultStrategy::alternative_ids() const {
   vector<LCC_API_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_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 */