mirror of
https://github.com/oxen-io/lokinet.git
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121 lines
3.3 KiB
C++
121 lines
3.3 KiB
C++
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#include <llarp/dht/context.hpp>
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#include <llarp/dht/messages/pubintro.hpp>
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#include <llarp/messages/dht.hpp>
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#include <llarp/messages/dht_immediate.hpp>
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#include "router.hpp"
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namespace llarp
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{
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namespace dht
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{
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PublishIntroMessage::~PublishIntroMessage()
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{
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}
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bool
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PublishIntroMessage::DecodeKey(llarp_buffer_t key, llarp_buffer_t *val)
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{
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bool read = false;
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if(llarp_buffer_eq(key, "E"))
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{
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return BEncodeReadList(E, val);
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}
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if(!BEncodeMaybeReadDictEntry("I", I, read, key, val))
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return false;
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if(!BEncodeMaybeReadDictInt("R", R, read, key, val))
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return false;
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if(llarp_buffer_eq(key, "S"))
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{
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read = true;
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hasS = true;
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if(!bencode_read_integer(val, &S))
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return false;
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}
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if(!BEncodeMaybeReadDictInt("T", txID, read, key, val))
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return false;
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if(!BEncodeMaybeReadDictInt("V", version, read, key, val))
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return false;
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return read;
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}
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bool
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PublishIntroMessage::HandleMessage(
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llarp_dht_context *ctx,
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std::vector< std::unique_ptr< IMessage > > &replies) const
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{
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auto now = ctx->impl.Now();
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if(S > 5)
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{
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llarp::LogWarn("invalid S value ", S, " > 5");
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return false;
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}
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auto &dht = ctx->impl;
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if(!I.Verify(&dht.router->crypto, now))
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{
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llarp::LogWarn("invalid introset: ", I);
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// don't propogate or store
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replies.emplace_back(new GotIntroMessage({}, txID));
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return true;
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}
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if(I.W && !I.W->IsValid(dht.router->crypto.shorthash, now))
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{
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llarp::LogWarn("proof of work not good enough for IntroSet");
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// don't propogate or store
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replies.emplace_back(new GotIntroMessage({}, txID));
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return true;
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}
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llarp::dht::Key_t addr;
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if(!I.A.CalculateAddress(addr))
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{
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llarp::LogWarn(
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"failed to calculate hidden service address for PubIntro message");
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return false;
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}
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now += llarp::service::MAX_INTROSET_TIME_DELTA;
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if(I.IsExpired(now))
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{
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// don't propogate or store
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replies.emplace_back(new GotIntroMessage({}, txID));
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return true;
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}
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dht.services->PutNode(I);
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replies.emplace_back(new GotIntroMessage({I}, txID));
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Key_t peer;
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std::set< Key_t > exclude;
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for(const auto &e : E)
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exclude.insert(e);
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exclude.insert(From);
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exclude.insert(dht.OurKey());
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if(S && dht.nodes->FindCloseExcluding(addr, peer, exclude))
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{
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dht.PropagateIntroSetTo(From, txID, I, peer, S - 1, exclude);
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}
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return true;
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}
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bool
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PublishIntroMessage::BEncode(llarp_buffer_t *buf) const
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{
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if(!bencode_start_dict(buf))
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return false;
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if(!BEncodeWriteDictMsgType(buf, "A", "I"))
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return false;
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if(!BEncodeWriteDictList("E", E, buf))
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return false;
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if(!BEncodeWriteDictEntry("I", I, buf))
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return false;
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if(!BEncodeWriteDictInt("R", R, buf))
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return false;
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if(!BEncodeWriteDictInt("S", S, buf))
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return false;
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if(!BEncodeWriteDictInt("T", txID, buf))
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return false;
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if(!BEncodeWriteDictInt("V", LLARP_PROTO_VERSION, buf))
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return false;
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return bencode_end(buf);
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}
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} // namespace dht
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} // namespace llarp
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