lokinet/llarp/service/lookup.hpp

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#ifndef LLARP_SERVICE_LOOKUP_HPP
#define LLARP_SERVICE_LOOKUP_HPP
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#include <routing/message.hpp>
#include <service/intro_set.hpp>
#include <path/pathset.hpp>
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#include <set>
namespace llarp
{
// forward declare
namespace path
{
struct Path;
}
namespace service
{
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struct ILookupHolder;
constexpr size_t MaxConcurrentLookups = size_t(4);
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struct IServiceLookup
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{
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IServiceLookup() = delete;
virtual ~IServiceLookup()
{
}
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/// handle lookup result
virtual bool
HandleResponse(__attribute__((unused))
const std::set< IntroSet >& results)
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{
return false;
}
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/// determine if this request has timed out
bool
IsTimedOut(llarp_time_t now, llarp_time_t timeout = 15000) const
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{
if(now <= m_created)
return false;
return now - m_created > timeout;
}
/// build request message for service lookup
virtual std::shared_ptr< routing::IMessage >
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BuildRequestMessage() = 0;
/// build a new request message and send it via a path
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bool
SendRequestViaPath(path::Path_ptr p, AbstractRouter* r);
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ILookupHolder* parent;
uint64_t txid;
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const std::string name;
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RouterID endpoint;
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util::StatusObject
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ExtractStatus() const
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{
auto now = time_now_ms();
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util::StatusObject obj{{"txid", txid},
{"endpoint", endpoint.ToHex()},
{"name", name},
{"timedOut", IsTimedOut(now)},
{"createdAt", m_created}};
return obj;
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}
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protected:
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IServiceLookup(ILookupHolder* parent, uint64_t tx,
const std::string& name);
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llarp_time_t m_created;
};
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struct ILookupHolder
{
virtual void
PutLookup(IServiceLookup* l, uint64_t txid) = 0;
};
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} // namespace service
} // namespace llarp
#endif