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832 lines
28 KiB
832 lines
28 KiB
// Copyright (c) 2012 Pieter Wuille
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// Copyright (c) 2012-2020 The Bitcoin Core developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#include <addrman.h>
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#include <hash.h>
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#include <i2p.h>
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#include <logging.h>
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#include <netaddress.h>
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#include <serialize.h>
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#include <cmath>
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#include <optional>
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#include <unordered_map>
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#include <unordered_set>
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int CAddrInfo::GetTriedBucket(const uint256& nKey, const std::vector<bool> &asmap) const
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{
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uint64_t hash1 = (CHashWriter(SER_GETHASH, 0) << nKey << GetKey()).GetCheapHash();
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uint64_t hash2 = (CHashWriter(SER_GETHASH, 0) << nKey << GetGroup(asmap) << (hash1 % ADDRMAN_TRIED_BUCKETS_PER_GROUP)).GetCheapHash();
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int tried_bucket = hash2 % ADDRMAN_TRIED_BUCKET_COUNT;
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uint32_t mapped_as = GetMappedAS(asmap);
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LogPrint(BCLog::NET, "IP %s mapped to AS%i belongs to tried bucket %i\n", ToStringIP(), mapped_as, tried_bucket);
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return tried_bucket;
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}
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int CAddrInfo::GetNewBucket(const uint256& nKey, const CNetAddr& src, const std::vector<bool> &asmap) const
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{
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std::vector<unsigned char> vchSourceGroupKey = src.GetGroup(asmap);
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uint64_t hash1 = (CHashWriter(SER_GETHASH, 0) << nKey << GetGroup(asmap) << vchSourceGroupKey).GetCheapHash();
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uint64_t hash2 = (CHashWriter(SER_GETHASH, 0) << nKey << vchSourceGroupKey << (hash1 % ADDRMAN_NEW_BUCKETS_PER_SOURCE_GROUP)).GetCheapHash();
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int new_bucket = hash2 % ADDRMAN_NEW_BUCKET_COUNT;
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uint32_t mapped_as = GetMappedAS(asmap);
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LogPrint(BCLog::NET, "IP %s mapped to AS%i belongs to new bucket %i\n", ToStringIP(), mapped_as, new_bucket);
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return new_bucket;
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}
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int CAddrInfo::GetBucketPosition(const uint256 &nKey, bool fNew, int nBucket) const
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{
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uint64_t hash1 = (CHashWriter(SER_GETHASH, 0) << nKey << (fNew ? uint8_t{'N'} : uint8_t{'K'}) << nBucket << GetKey()).GetCheapHash();
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return hash1 % ADDRMAN_BUCKET_SIZE;
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}
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bool CAddrInfo::IsTerrible(int64_t nNow) const
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{
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if (nLastTry && nLastTry >= nNow - 60) // never remove things tried in the last minute
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return false;
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if (nTime > nNow + 10 * 60) // came in a flying DeLorean
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return true;
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if (nTime == 0 || nNow - nTime > ADDRMAN_HORIZON_DAYS * 24 * 60 * 60) // not seen in recent history
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return true;
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if (nLastSuccess == 0 && nAttempts >= ADDRMAN_RETRIES) // tried N times and never a success
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return true;
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if (nNow - nLastSuccess > ADDRMAN_MIN_FAIL_DAYS * 24 * 60 * 60 && nAttempts >= ADDRMAN_MAX_FAILURES) // N successive failures in the last week
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return true;
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return false;
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}
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double CAddrInfo::GetChance(int64_t nNow) const
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{
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double fChance = 1.0;
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int64_t nSinceLastTry = std::max<int64_t>(nNow - nLastTry, 0);
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// deprioritize very recent attempts away
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if (nSinceLastTry < 60 * 10)
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fChance *= 0.01;
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// deprioritize 66% after each failed attempt, but at most 1/28th to avoid the search taking forever or overly penalizing outages.
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fChance *= pow(0.66, std::min(nAttempts, 8));
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return fChance;
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}
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void CAddrMan::RemoveInvalid()
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{
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for (size_t bucket = 0; bucket < ADDRMAN_NEW_BUCKET_COUNT; ++bucket) {
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for (size_t i = 0; i < ADDRMAN_BUCKET_SIZE; ++i) {
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const auto id = vvNew[bucket][i];
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if (id != -1 && !mapInfo[id].IsValid()) {
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ClearNew(bucket, i);
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}
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}
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}
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for (size_t bucket = 0; bucket < ADDRMAN_TRIED_BUCKET_COUNT; ++bucket) {
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for (size_t i = 0; i < ADDRMAN_BUCKET_SIZE; ++i) {
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const auto id = vvTried[bucket][i];
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if (id == -1) {
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continue;
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}
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const auto& addr_info = mapInfo[id];
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if (addr_info.IsValid()) {
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continue;
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}
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vvTried[bucket][i] = -1;
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--nTried;
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SwapRandom(addr_info.nRandomPos, vRandom.size() - 1);
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vRandom.pop_back();
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mapAddr.erase(addr_info);
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mapInfo.erase(id);
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m_tried_collisions.erase(id);
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}
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}
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}
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CAddrInfo* CAddrMan::Find(const CNetAddr& addr, int* pnId)
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{
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AssertLockHeld(cs);
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const auto it = mapAddr.find(addr);
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if (it == mapAddr.end())
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return nullptr;
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if (pnId)
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*pnId = (*it).second;
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const auto it2 = mapInfo.find((*it).second);
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if (it2 != mapInfo.end())
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return &(*it2).second;
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return nullptr;
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}
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CAddrInfo* CAddrMan::Create(const CAddress& addr, const CNetAddr& addrSource, int* pnId)
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{
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AssertLockHeld(cs);
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int nId = nIdCount++;
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mapInfo[nId] = CAddrInfo(addr, addrSource);
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mapAddr[addr] = nId;
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mapInfo[nId].nRandomPos = vRandom.size();
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vRandom.push_back(nId);
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if (pnId)
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*pnId = nId;
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return &mapInfo[nId];
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}
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void CAddrMan::SwapRandom(unsigned int nRndPos1, unsigned int nRndPos2)
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{
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AssertLockHeld(cs);
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if (nRndPos1 == nRndPos2)
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return;
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assert(nRndPos1 < vRandom.size() && nRndPos2 < vRandom.size());
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int nId1 = vRandom[nRndPos1];
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int nId2 = vRandom[nRndPos2];
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assert(mapInfo.count(nId1) == 1);
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assert(mapInfo.count(nId2) == 1);
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mapInfo[nId1].nRandomPos = nRndPos2;
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mapInfo[nId2].nRandomPos = nRndPos1;
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vRandom[nRndPos1] = nId2;
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vRandom[nRndPos2] = nId1;
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}
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void CAddrMan::Delete(int nId)
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{
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AssertLockHeld(cs);
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assert(mapInfo.count(nId) != 0);
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CAddrInfo& info = mapInfo[nId];
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assert(!info.fInTried);
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assert(info.nRefCount == 0);
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SwapRandom(info.nRandomPos, vRandom.size() - 1);
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vRandom.pop_back();
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mapAddr.erase(info);
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mapInfo.erase(nId);
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nNew--;
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}
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void CAddrMan::ClearNew(int nUBucket, int nUBucketPos)
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{
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AssertLockHeld(cs);
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// if there is an entry in the specified bucket, delete it.
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if (vvNew[nUBucket][nUBucketPos] != -1) {
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int nIdDelete = vvNew[nUBucket][nUBucketPos];
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CAddrInfo& infoDelete = mapInfo[nIdDelete];
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assert(infoDelete.nRefCount > 0);
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infoDelete.nRefCount--;
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vvNew[nUBucket][nUBucketPos] = -1;
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if (infoDelete.nRefCount == 0) {
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Delete(nIdDelete);
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}
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}
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}
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void CAddrMan::MakeTried(CAddrInfo& info, int nId)
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{
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AssertLockHeld(cs);
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// remove the entry from all new buckets
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for (int bucket = 0; bucket < ADDRMAN_NEW_BUCKET_COUNT; bucket++) {
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int pos = info.GetBucketPosition(nKey, true, bucket);
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if (vvNew[bucket][pos] == nId) {
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vvNew[bucket][pos] = -1;
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info.nRefCount--;
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}
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}
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nNew--;
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assert(info.nRefCount == 0);
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// which tried bucket to move the entry to
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int nKBucket = info.GetTriedBucket(nKey, m_asmap);
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int nKBucketPos = info.GetBucketPosition(nKey, false, nKBucket);
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// first make space to add it (the existing tried entry there is moved to new, deleting whatever is there).
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if (vvTried[nKBucket][nKBucketPos] != -1) {
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// find an item to evict
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int nIdEvict = vvTried[nKBucket][nKBucketPos];
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assert(mapInfo.count(nIdEvict) == 1);
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CAddrInfo& infoOld = mapInfo[nIdEvict];
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// Remove the to-be-evicted item from the tried set.
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infoOld.fInTried = false;
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vvTried[nKBucket][nKBucketPos] = -1;
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nTried--;
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// find which new bucket it belongs to
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int nUBucket = infoOld.GetNewBucket(nKey, m_asmap);
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int nUBucketPos = infoOld.GetBucketPosition(nKey, true, nUBucket);
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ClearNew(nUBucket, nUBucketPos);
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assert(vvNew[nUBucket][nUBucketPos] == -1);
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// Enter it into the new set again.
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infoOld.nRefCount = 1;
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vvNew[nUBucket][nUBucketPos] = nIdEvict;
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nNew++;
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}
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assert(vvTried[nKBucket][nKBucketPos] == -1);
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vvTried[nKBucket][nKBucketPos] = nId;
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nTried++;
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info.fInTried = true;
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}
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void CAddrMan::Good_(const CService& addr, bool test_before_evict, int64_t nTime)
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{
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AssertLockHeld(cs);
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int nId;
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nLastGood = nTime;
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CAddrInfo* pinfo = Find(addr, &nId);
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// if not found, bail out
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if (!pinfo)
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return;
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CAddrInfo& info = *pinfo;
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// check whether we are talking about the exact same CService (including same port)
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if (info != addr)
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return;
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// update info
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info.nLastSuccess = nTime;
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info.nLastTry = nTime;
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info.nAttempts = 0;
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// nTime is not updated here, to avoid leaking information about
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// currently-connected peers.
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// if it is already in the tried set, don't do anything else
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if (info.fInTried)
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return;
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// find a bucket it is in now
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int nRnd = insecure_rand.randrange(ADDRMAN_NEW_BUCKET_COUNT);
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int nUBucket = -1;
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for (unsigned int n = 0; n < ADDRMAN_NEW_BUCKET_COUNT; n++) {
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int nB = (n + nRnd) % ADDRMAN_NEW_BUCKET_COUNT;
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int nBpos = info.GetBucketPosition(nKey, true, nB);
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if (vvNew[nB][nBpos] == nId) {
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nUBucket = nB;
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break;
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}
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}
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// if no bucket is found, something bad happened;
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// TODO: maybe re-add the node, but for now, just bail out
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if (nUBucket == -1)
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return;
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// which tried bucket to move the entry to
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int tried_bucket = info.GetTriedBucket(nKey, m_asmap);
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int tried_bucket_pos = info.GetBucketPosition(nKey, false, tried_bucket);
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// Will moving this address into tried evict another entry?
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if (test_before_evict && (vvTried[tried_bucket][tried_bucket_pos] != -1)) {
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// Output the entry we'd be colliding with, for debugging purposes
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auto colliding_entry = mapInfo.find(vvTried[tried_bucket][tried_bucket_pos]);
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LogPrint(BCLog::ADDRMAN, "Collision inserting element into tried table (%s), moving %s to m_tried_collisions=%d\n", colliding_entry != mapInfo.end() ? colliding_entry->second.ToString() : "", addr.ToString(), m_tried_collisions.size());
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if (m_tried_collisions.size() < ADDRMAN_SET_TRIED_COLLISION_SIZE) {
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m_tried_collisions.insert(nId);
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}
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} else {
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LogPrint(BCLog::ADDRMAN, "Moving %s to tried\n", addr.ToString());
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// move nId to the tried tables
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MakeTried(info, nId);
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}
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}
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bool CAddrMan::Add_(const CAddress& addr, const CNetAddr& source, int64_t nTimePenalty)
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{
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AssertLockHeld(cs);
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if (!addr.IsRoutable())
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return false;
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bool fNew = false;
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int nId;
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CAddrInfo* pinfo = Find(addr, &nId);
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// Do not set a penalty for a source's self-announcement
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if (addr == source) {
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nTimePenalty = 0;
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}
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if (pinfo) {
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// periodically update nTime
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bool fCurrentlyOnline = (GetAdjustedTime() - addr.nTime < 24 * 60 * 60);
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int64_t nUpdateInterval = (fCurrentlyOnline ? 60 * 60 : 24 * 60 * 60);
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if (addr.nTime && (!pinfo->nTime || pinfo->nTime < addr.nTime - nUpdateInterval - nTimePenalty))
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pinfo->nTime = std::max((int64_t)0, addr.nTime - nTimePenalty);
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// add services
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pinfo->nServices = ServiceFlags(pinfo->nServices | addr.nServices);
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// do not update if no new information is present
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if (!addr.nTime || (pinfo->nTime && addr.nTime <= pinfo->nTime))
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return false;
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// do not update if the entry was already in the "tried" table
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if (pinfo->fInTried)
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return false;
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// do not update if the max reference count is reached
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if (pinfo->nRefCount == ADDRMAN_NEW_BUCKETS_PER_ADDRESS)
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return false;
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// stochastic test: previous nRefCount == N: 2^N times harder to increase it
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int nFactor = 1;
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for (int n = 0; n < pinfo->nRefCount; n++)
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nFactor *= 2;
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if (nFactor > 1 && (insecure_rand.randrange(nFactor) != 0))
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return false;
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} else {
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pinfo = Create(addr, source, &nId);
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pinfo->nTime = std::max((int64_t)0, (int64_t)pinfo->nTime - nTimePenalty);
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nNew++;
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fNew = true;
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}
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int nUBucket = pinfo->GetNewBucket(nKey, source, m_asmap);
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int nUBucketPos = pinfo->GetBucketPosition(nKey, true, nUBucket);
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if (vvNew[nUBucket][nUBucketPos] != nId) {
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bool fInsert = vvNew[nUBucket][nUBucketPos] == -1;
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if (!fInsert) {
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CAddrInfo& infoExisting = mapInfo[vvNew[nUBucket][nUBucketPos]];
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if (infoExisting.IsTerrible() || (infoExisting.nRefCount > 1 && pinfo->nRefCount == 0)) {
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// Overwrite the existing new table entry.
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fInsert = true;
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}
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}
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if (fInsert) {
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ClearNew(nUBucket, nUBucketPos);
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pinfo->nRefCount++;
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vvNew[nUBucket][nUBucketPos] = nId;
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} else {
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if (pinfo->nRefCount == 0) {
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Delete(nId);
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}
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}
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}
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return fNew;
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}
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void CAddrMan::Attempt_(const CService& addr, bool fCountFailure, int64_t nTime)
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{
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AssertLockHeld(cs);
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CAddrInfo* pinfo = Find(addr);
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// if not found, bail out
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if (!pinfo)
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return;
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CAddrInfo& info = *pinfo;
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// check whether we are talking about the exact same CService (including same port)
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if (info != addr)
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return;
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// update info
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info.nLastTry = nTime;
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if (fCountFailure && info.nLastCountAttempt < nLastGood) {
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info.nLastCountAttempt = nTime;
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info.nAttempts++;
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}
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}
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CAddrInfo CAddrMan::Select_(bool newOnly)
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{
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AssertLockHeld(cs);
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if (vRandom.empty())
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return CAddrInfo();
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if (newOnly && nNew == 0)
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return CAddrInfo();
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// Use a 50% chance for choosing between tried and new table entries.
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if (!newOnly &&
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(nTried > 0 && (nNew == 0 || insecure_rand.randbool() == 0))) {
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// use a tried node
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double fChanceFactor = 1.0;
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while (1) {
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int nKBucket = insecure_rand.randrange(ADDRMAN_TRIED_BUCKET_COUNT);
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int nKBucketPos = insecure_rand.randrange(ADDRMAN_BUCKET_SIZE);
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while (vvTried[nKBucket][nKBucketPos] == -1) {
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nKBucket = (nKBucket + insecure_rand.randbits(ADDRMAN_TRIED_BUCKET_COUNT_LOG2)) % ADDRMAN_TRIED_BUCKET_COUNT;
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nKBucketPos = (nKBucketPos + insecure_rand.randbits(ADDRMAN_BUCKET_SIZE_LOG2)) % ADDRMAN_BUCKET_SIZE;
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}
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int nId = vvTried[nKBucket][nKBucketPos];
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assert(mapInfo.count(nId) == 1);
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CAddrInfo& info = mapInfo[nId];
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if (insecure_rand.randbits(30) < fChanceFactor * info.GetChance() * (1 << 30))
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return info;
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fChanceFactor *= 1.2;
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}
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} else {
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// use a new node
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double fChanceFactor = 1.0;
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while (1) {
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int nUBucket = insecure_rand.randrange(ADDRMAN_NEW_BUCKET_COUNT);
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int nUBucketPos = insecure_rand.randrange(ADDRMAN_BUCKET_SIZE);
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while (vvNew[nUBucket][nUBucketPos] == -1) {
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nUBucket = (nUBucket + insecure_rand.randbits(ADDRMAN_NEW_BUCKET_COUNT_LOG2)) % ADDRMAN_NEW_BUCKET_COUNT;
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nUBucketPos = (nUBucketPos + insecure_rand.randbits(ADDRMAN_BUCKET_SIZE_LOG2)) % ADDRMAN_BUCKET_SIZE;
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}
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int nId = vvNew[nUBucket][nUBucketPos];
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assert(mapInfo.count(nId) == 1);
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CAddrInfo& info = mapInfo[nId];
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if (insecure_rand.randbits(30) < fChanceFactor * info.GetChance() * (1 << 30))
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return info;
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fChanceFactor *= 1.2;
|
|
}
|
|
}
|
|
}
|
|
|
|
#ifdef DEBUG_ADDRMAN
|
|
int CAddrMan::Check_()
|
|
{
|
|
AssertLockHeld(cs);
|
|
|
|
std::unordered_set<int> setTried;
|
|
std::unordered_map<int, int> mapNew;
|
|
|
|
if (vRandom.size() != (size_t)(nTried + nNew))
|
|
return -7;
|
|
|
|
for (const auto& entry : mapInfo) {
|
|
int n = entry.first;
|
|
const CAddrInfo& info = entry.second;
|
|
if (info.fInTried) {
|
|
if (!info.nLastSuccess)
|
|
return -1;
|
|
if (info.nRefCount)
|
|
return -2;
|
|
setTried.insert(n);
|
|
} else {
|
|
if (info.nRefCount < 0 || info.nRefCount > ADDRMAN_NEW_BUCKETS_PER_ADDRESS)
|
|
return -3;
|
|
if (!info.nRefCount)
|
|
return -4;
|
|
mapNew[n] = info.nRefCount;
|
|
}
|
|
if (mapAddr[info] != n)
|
|
return -5;
|
|
if (info.nRandomPos < 0 || (size_t)info.nRandomPos >= vRandom.size() || vRandom[info.nRandomPos] != n)
|
|
return -14;
|
|
if (info.nLastTry < 0)
|
|
return -6;
|
|
if (info.nLastSuccess < 0)
|
|
return -8;
|
|
}
|
|
|
|
if (setTried.size() != (size_t)nTried)
|
|
return -9;
|
|
if (mapNew.size() != (size_t)nNew)
|
|
return -10;
|
|
|
|
for (int n = 0; n < ADDRMAN_TRIED_BUCKET_COUNT; n++) {
|
|
for (int i = 0; i < ADDRMAN_BUCKET_SIZE; i++) {
|
|
if (vvTried[n][i] != -1) {
|
|
if (!setTried.count(vvTried[n][i]))
|
|
return -11;
|
|
if (mapInfo[vvTried[n][i]].GetTriedBucket(nKey, m_asmap) != n)
|
|
return -17;
|
|
if (mapInfo[vvTried[n][i]].GetBucketPosition(nKey, false, n) != i)
|
|
return -18;
|
|
setTried.erase(vvTried[n][i]);
|
|
}
|
|
}
|
|
}
|
|
|
|
for (int n = 0; n < ADDRMAN_NEW_BUCKET_COUNT; n++) {
|
|
for (int i = 0; i < ADDRMAN_BUCKET_SIZE; i++) {
|
|
if (vvNew[n][i] != -1) {
|
|
if (!mapNew.count(vvNew[n][i]))
|
|
return -12;
|
|
if (mapInfo[vvNew[n][i]].GetBucketPosition(nKey, true, n) != i)
|
|
return -19;
|
|
if (--mapNew[vvNew[n][i]] == 0)
|
|
mapNew.erase(vvNew[n][i]);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (setTried.size())
|
|
return -13;
|
|
if (mapNew.size())
|
|
return -15;
|
|
if (nKey.IsNull())
|
|
return -16;
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
void CAddrMan::GetAddr_(std::vector<CAddress>& vAddr, size_t max_addresses, size_t max_pct, std::optional<Network> network)
|
|
{
|
|
AssertLockHeld(cs);
|
|
|
|
size_t nNodes = vRandom.size();
|
|
if (max_pct != 0) {
|
|
nNodes = max_pct * nNodes / 100;
|
|
}
|
|
if (max_addresses != 0) {
|
|
nNodes = std::min(nNodes, max_addresses);
|
|
}
|
|
|
|
// gather a list of random nodes, skipping those of low quality
|
|
const int64_t now{GetAdjustedTime()};
|
|
for (unsigned int n = 0; n < vRandom.size(); n++) {
|
|
if (vAddr.size() >= nNodes)
|
|
break;
|
|
|
|
int nRndPos = insecure_rand.randrange(vRandom.size() - n) + n;
|
|
SwapRandom(n, nRndPos);
|
|
assert(mapInfo.count(vRandom[n]) == 1);
|
|
|
|
const CAddrInfo& ai = mapInfo[vRandom[n]];
|
|
|
|
// Filter by network (optional)
|
|
if (network != std::nullopt && ai.GetNetClass() != network) continue;
|
|
|
|
// Filter for quality
|
|
if (ai.IsTerrible(now)) continue;
|
|
|
|
vAddr.push_back(ai);
|
|
}
|
|
}
|
|
|
|
void CAddrMan::Connected_(const CService& addr, int64_t nTime)
|
|
{
|
|
AssertLockHeld(cs);
|
|
|
|
CAddrInfo* pinfo = Find(addr);
|
|
|
|
// if not found, bail out
|
|
if (!pinfo)
|
|
return;
|
|
|
|
CAddrInfo& info = *pinfo;
|
|
|
|
// check whether we are talking about the exact same CService (including same port)
|
|
if (info != addr)
|
|
return;
|
|
|
|
// update info
|
|
int64_t nUpdateInterval = 20 * 60;
|
|
if (nTime - info.nTime > nUpdateInterval)
|
|
info.nTime = nTime;
|
|
}
|
|
|
|
void CAddrMan::SetServices_(const CService& addr, ServiceFlags nServices)
|
|
{
|
|
AssertLockHeld(cs);
|
|
|
|
CAddrInfo* pinfo = Find(addr);
|
|
|
|
// if not found, bail out
|
|
if (!pinfo)
|
|
return;
|
|
|
|
CAddrInfo& info = *pinfo;
|
|
|
|
// check whether we are talking about the exact same CService (including same port)
|
|
if (info != addr)
|
|
return;
|
|
|
|
// update info
|
|
info.nServices = nServices;
|
|
}
|
|
|
|
void CAddrMan::ResolveCollisions_()
|
|
{
|
|
AssertLockHeld(cs);
|
|
|
|
for (std::set<int>::iterator it = m_tried_collisions.begin(); it != m_tried_collisions.end();) {
|
|
int id_new = *it;
|
|
|
|
bool erase_collision = false;
|
|
|
|
// If id_new not found in mapInfo remove it from m_tried_collisions
|
|
if (mapInfo.count(id_new) != 1) {
|
|
erase_collision = true;
|
|
} else {
|
|
CAddrInfo& info_new = mapInfo[id_new];
|
|
|
|
// Which tried bucket to move the entry to.
|
|
int tried_bucket = info_new.GetTriedBucket(nKey, m_asmap);
|
|
int tried_bucket_pos = info_new.GetBucketPosition(nKey, false, tried_bucket);
|
|
if (!info_new.IsValid()) { // id_new may no longer map to a valid address
|
|
erase_collision = true;
|
|
} else if (vvTried[tried_bucket][tried_bucket_pos] != -1) { // The position in the tried bucket is not empty
|
|
|
|
// Get the to-be-evicted address that is being tested
|
|
int id_old = vvTried[tried_bucket][tried_bucket_pos];
|
|
CAddrInfo& info_old = mapInfo[id_old];
|
|
|
|
// Has successfully connected in last X hours
|
|
if (GetAdjustedTime() - info_old.nLastSuccess < ADDRMAN_REPLACEMENT_HOURS*(60*60)) {
|
|
erase_collision = true;
|
|
} else if (GetAdjustedTime() - info_old.nLastTry < ADDRMAN_REPLACEMENT_HOURS*(60*60)) { // attempted to connect and failed in last X hours
|
|
|
|
// Give address at least 60 seconds to successfully connect
|
|
if (GetAdjustedTime() - info_old.nLastTry > 60) {
|
|
LogPrint(BCLog::ADDRMAN, "Replacing %s with %s in tried table\n", info_old.ToString(), info_new.ToString());
|
|
|
|
// Replaces an existing address already in the tried table with the new address
|
|
Good_(info_new, false, GetAdjustedTime());
|
|
erase_collision = true;
|
|
}
|
|
} else if (GetAdjustedTime() - info_new.nLastSuccess > ADDRMAN_TEST_WINDOW) {
|
|
// If the collision hasn't resolved in some reasonable amount of time,
|
|
// just evict the old entry -- we must not be able to
|
|
// connect to it for some reason.
|
|
LogPrint(BCLog::ADDRMAN, "Unable to test; replacing %s with %s in tried table anyway\n", info_old.ToString(), info_new.ToString());
|
|
Good_(info_new, false, GetAdjustedTime());
|
|
erase_collision = true;
|
|
}
|
|
} else { // Collision is not actually a collision anymore
|
|
Good_(info_new, false, GetAdjustedTime());
|
|
erase_collision = true;
|
|
}
|
|
}
|
|
|
|
if (erase_collision) {
|
|
m_tried_collisions.erase(it++);
|
|
} else {
|
|
it++;
|
|
}
|
|
}
|
|
}
|
|
|
|
CAddrInfo CAddrMan::SelectTriedCollision_()
|
|
{
|
|
AssertLockHeld(cs);
|
|
|
|
if (m_tried_collisions.size() == 0) return CAddrInfo();
|
|
|
|
std::set<int>::iterator it = m_tried_collisions.begin();
|
|
|
|
// Selects a random element from m_tried_collisions
|
|
std::advance(it, insecure_rand.randrange(m_tried_collisions.size()));
|
|
int id_new = *it;
|
|
|
|
// If id_new not found in mapInfo remove it from m_tried_collisions
|
|
if (mapInfo.count(id_new) != 1) {
|
|
m_tried_collisions.erase(it);
|
|
return CAddrInfo();
|
|
}
|
|
|
|
const CAddrInfo& newInfo = mapInfo[id_new];
|
|
|
|
// which tried bucket to move the entry to
|
|
int tried_bucket = newInfo.GetTriedBucket(nKey, m_asmap);
|
|
int tried_bucket_pos = newInfo.GetBucketPosition(nKey, false, tried_bucket);
|
|
|
|
int id_old = vvTried[tried_bucket][tried_bucket_pos];
|
|
|
|
return mapInfo[id_old];
|
|
}
|
|
|
|
std::vector<bool> CAddrMan::DecodeAsmap(fs::path path)
|
|
{
|
|
std::vector<bool> bits;
|
|
FILE *filestr = fsbridge::fopen(path, "rb");
|
|
CAutoFile file(filestr, SER_DISK, CLIENT_VERSION);
|
|
if (file.IsNull()) {
|
|
LogPrintf("Failed to open asmap file from disk\n");
|
|
return bits;
|
|
}
|
|
fseek(filestr, 0, SEEK_END);
|
|
int length = ftell(filestr);
|
|
LogPrintf("Opened asmap file %s (%d bytes) from disk\n", path, length);
|
|
fseek(filestr, 0, SEEK_SET);
|
|
uint8_t cur_byte;
|
|
for (int i = 0; i < length; ++i) {
|
|
file >> cur_byte;
|
|
for (int bit = 0; bit < 8; ++bit) {
|
|
bits.push_back((cur_byte >> bit) & 1);
|
|
}
|
|
}
|
|
if (!SanityCheckASMap(bits)) {
|
|
LogPrintf("Sanity check of asmap file %s failed\n", path);
|
|
return {};
|
|
}
|
|
return bits;
|
|
}
|
|
|
|
void CAddrMan::ResetI2PPorts()
|
|
{
|
|
for (int bucket = 0; bucket < ADDRMAN_NEW_BUCKET_COUNT; ++bucket) {
|
|
for (int i = 0; i < ADDRMAN_BUCKET_SIZE; ++i) {
|
|
const auto id = vvNew[bucket][i];
|
|
if (id == -1) {
|
|
continue;
|
|
}
|
|
auto it = mapInfo.find(id);
|
|
if (it == mapInfo.end()) {
|
|
return;
|
|
}
|
|
auto& addr_info = it->second;
|
|
if (!addr_info.IsI2P() || addr_info.GetPort() == I2P_SAM31_PORT) {
|
|
continue;
|
|
}
|
|
|
|
auto addr_info_newport = addr_info;
|
|
// The below changes addr_info_newport.GetKey(), which is used in finding a
|
|
// bucket and a position within that bucket. So a re-bucketing may be necessary.
|
|
addr_info_newport.port = I2P_SAM31_PORT;
|
|
|
|
// Reposition entries of vvNew within the same bucket because we don't know the source
|
|
// address which led to the decision to store the entry in vvNew[bucket] so we can't
|
|
// re-evaluate that decision, but even if we could, CAddrInfo::GetNewBucket() does not
|
|
// use CAddrInfo::GetKey() so it would end up in the same bucket as before the port
|
|
// change.
|
|
const auto i_target = addr_info_newport.GetBucketPosition(nKey, true, bucket);
|
|
|
|
if (i_target == i) { // No need to re-position.
|
|
addr_info = addr_info_newport;
|
|
continue;
|
|
}
|
|
|
|
// Reposition from i to i_target, removing the entry from i_target (if any).
|
|
ClearNew(bucket, i_target);
|
|
vvNew[bucket][i_target] = id;
|
|
vvNew[bucket][i] = -1;
|
|
addr_info = addr_info_newport;
|
|
}
|
|
}
|
|
|
|
for (int bucket = 0; bucket < ADDRMAN_TRIED_BUCKET_COUNT; ++bucket) {
|
|
for (int i = 0; i < ADDRMAN_BUCKET_SIZE; ++i) {
|
|
const auto id = vvTried[bucket][i];
|
|
if (id == -1) {
|
|
continue;
|
|
}
|
|
auto it = mapInfo.find(id);
|
|
if (it == mapInfo.end()) {
|
|
return;
|
|
}
|
|
auto& addr_info = it->second;
|
|
if (!addr_info.IsI2P() || addr_info.GetPort() == I2P_SAM31_PORT) {
|
|
continue;
|
|
}
|
|
|
|
auto addr_info_newport = addr_info;
|
|
// The below changes addr_info_newport.GetKey(), which is used in finding a
|
|
// bucket and a position within that bucket. So a re-bucketing may be necessary.
|
|
addr_info_newport.port = I2P_SAM31_PORT;
|
|
|
|
const auto bucket_target = addr_info_newport.GetTriedBucket(nKey, m_asmap);
|
|
const auto i_target = addr_info_newport.GetBucketPosition(nKey, false, bucket_target);
|
|
|
|
if (bucket_target == bucket && i_target == i) { // No need to re-position.
|
|
addr_info = addr_info_newport;
|
|
continue;
|
|
}
|
|
|
|
// Reposition from (bucket, i) to (bucket_target, i_target). If the latter is
|
|
// occupied, then move the entry from there to vvNew.
|
|
|
|
const auto old_target_id = vvTried[bucket_target][i_target];
|
|
if (old_target_id != -1) {
|
|
CAddrInfo& old_target_info = mapInfo[old_target_id];
|
|
|
|
old_target_info.fInTried = false;
|
|
vvTried[bucket_target][i_target] = -1;
|
|
--nTried;
|
|
|
|
const auto new_bucket = old_target_info.GetNewBucket(nKey, m_asmap);
|
|
const auto new_bucket_i = old_target_info.GetBucketPosition(nKey, true, new_bucket);
|
|
ClearNew(new_bucket, new_bucket_i);
|
|
|
|
old_target_info.nRefCount = 1;
|
|
vvNew[new_bucket][new_bucket_i] = old_target_id;
|
|
++nNew;
|
|
}
|
|
|
|
vvTried[bucket_target][i_target] = id;
|
|
vvTried[bucket][i] = -1;
|
|
addr_info = addr_info_newport;
|
|
}
|
|
}
|
|
}
|