lokinet/llarp/dht/localrouterlookup.cpp

#include "localrouterlookup.hpp"

#include "context.hpp"
#include <llarp/dht/messages/gotrouter.hpp>

#include <llarp/path/path_context.hpp>
#include <llarp/router/router.hpp>
#include <llarp/routing/path_dht_message.hpp>
#include <llarp/util/logging.hpp>

namespace llarp::dht
{
  LocalRouterLookup::LocalRouterLookup(
      const PathID_t& path, uint64_t txid, const RouterID& _target, AbstractDHTMessageHandler* ctx)
      : RecursiveRouterLookup(TXOwner{ctx->OurKey(), txid}, _target, ctx, nullptr), localPath(path)
  {}

  void
  LocalRouterLookup::SendReply()
  {
    auto path =
        parent->GetRouter()->path_context().GetByUpstream(parent->OurKey().as_array(), localPath);
    if (!path)
    {
      llarp::LogWarn(
          "did not send reply for relayed dht request, no such local path "
          "for pathid=",
          localPath);
      return;
    }
    if (valuesFound.size())
    {
      RouterContact found;
      for (const auto& rc : valuesFound)
      {
        if (rc.OtherIsNewer(found))
          found = rc;
      }
      valuesFound.clear();
      if (not found.pubkey.IsZero())
      {
        valuesFound.resize(1);
        valuesFound[0] = found;
      }
      else
      {
        llarp::LogWarn("We found a null RC for dht request, dropping it");
      }
    }
    routing::PathDHTMessage msg;
    msg.dht_msgs.emplace_back(
        new GotRouterMessage(parent->OurKey(), whoasked.txid, valuesFound, true));
    if (!path->SendRoutingMessage(msg, parent->GetRouter()))
    {
      llarp::LogWarn(
          "failed to send routing message when informing result of dht "
          "request, pathid=",
          localPath);
    }
  }
}  // namespace llarp::dht