lokinet/llarp/dht/taglookup.cpp

#include <dht/taglookup.hpp>

#include <dht/context.hpp>
#include <dht/messages/gotintro.hpp>

namespace llarp
{
  namespace dht
  {
    bool
    TagLookup::Validate(const service::IntroSet &introset) const
    {
      if(!introset.Verify(parent->Crypto(), parent->Now()))
      {
        llarp::LogWarn("got invalid introset from tag lookup");
        return false;
      }
      if(introset.topic != target)
      {
        llarp::LogWarn("got introset with missmatched topic in tag lookup");
        return false;
      }
      return true;
    }

    void
    TagLookup::Start(const TXOwner &peer)
    {
      parent->DHTSendTo(peer.node.as_array(),
                        new FindIntroMessage(target, peer.txid, R));
    }

    void
    TagLookup::ExtractStatus(util::StatusObject &obj) const
    {
      std::vector< util::StatusObject > foundObjs(valuesFound.size());
      {
        size_t idx = 0;
        for(const auto &found : valuesFound)
        {
          util::StatusObject &introsetObj = foundObjs[idx++];
          found.ExtractStatus(introsetObj);
        }
      }
      obj.PutObjectArray("found", foundObjs);

      util::StatusObject txownerObj;
      txownerObj.PutInt("txid", whoasked.txid);
      txownerObj.PutString("node", whoasked.node.ToHex());
      obj.PutObject("whoasked", txownerObj);

      std::vector< std::string > asked;
      for(const auto &peer : peersAsked)
        asked.emplace_back(peer.ToHex());
      obj.PutStringArray("asked", asked);
      obj.PutString("target", target.ToString());
    }

    void
    TagLookup::SendReply()
    {
      std::set< service::IntroSet > found(valuesFound.begin(),
                                          valuesFound.end());
      // collect our local values if we haven't hit a limit
      if(found.size() < 2)
      {
        auto tags =
            parent->FindRandomIntroSetsWithTagExcluding(target, 1, found);
        std::copy(tags.begin(), tags.end(), std::inserter(found, found.end()));
      }
      std::vector< service::IntroSet > values(found.begin(), found.end());

      parent->DHTSendTo(whoasked.node.as_array(),
                        new GotIntroMessage(values, whoasked.txid));
    }
  }  // namespace dht
}  // namespace llarp