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-rw-r--r--src/addrman.cpp506
-rw-r--r--src/addrman.h499
-rw-r--r--src/db.cpp71
-rw-r--r--src/db.h4
-rw-r--r--src/init.cpp2
-rw-r--r--src/irc.cpp2
-rw-r--r--src/main.cpp66
-rw-r--r--src/makefile.linux-mingw1
-rw-r--r--src/makefile.mingw1
-rw-r--r--src/makefile.osx1
-rw-r--r--src/makefile.unix1
-rw-r--r--src/net.cpp250
-rw-r--r--src/net.h6
-rw-r--r--src/netbase.cpp13
-rw-r--r--src/protocol.h2
-rw-r--r--src/uint256.h4
16 files changed, 1179 insertions, 250 deletions
diff --git a/src/addrman.cpp b/src/addrman.cpp
new file mode 100644
index 0000000000..2ef666cf2c
--- /dev/null
+++ b/src/addrman.cpp
@@ -0,0 +1,506 @@
+// Copyright (c) 2012 Pieter Wuille
+// Distributed under the MIT/X11 software license, see the accompanying
+// file license.txt or http://www.opensource.org/licenses/mit-license.php.
+
+#include "addrman.h"
+
+using namespace std;
+
+int CAddrInfo::GetTriedBucket(const std::vector<unsigned char> &nKey) const
+{
+ CDataStream ss1(SER_GETHASH);
+ std::vector<unsigned char> vchKey = GetKey();
+ ss1 << nKey << vchKey;
+ uint64 hash1 = Hash(ss1.begin(), ss1.end()).Get64();
+
+ CDataStream ss2(SER_GETHASH);
+ std::vector<unsigned char> vchGroupKey = GetGroup();
+ ss2 << nKey << vchGroupKey << (hash1 % ADDRMAN_TRIED_BUCKETS_PER_GROUP);
+ uint64 hash2 = Hash(ss2.begin(), ss2.end()).Get64();
+ return hash2 % ADDRMAN_TRIED_BUCKET_COUNT;
+}
+
+int CAddrInfo::GetNewBucket(const std::vector<unsigned char> &nKey, const CNetAddr& src) const
+{
+ CDataStream ss1(SER_GETHASH);
+ std::vector<unsigned char> vchGroupKey = GetGroup();
+ std::vector<unsigned char> vchSourceGroupKey = src.GetGroup();
+ ss1 << nKey << vchGroupKey << vchSourceGroupKey;
+ uint64 hash1 = Hash(ss1.begin(), ss1.end()).Get64();
+
+ CDataStream ss2(SER_GETHASH);
+ ss2 << nKey << vchSourceGroupKey << (hash1 % ADDRMAN_NEW_BUCKETS_PER_SOURCE_GROUP);
+ uint64 hash2 = Hash(ss2.begin(), ss2.end()).Get64();
+ return hash2 % ADDRMAN_NEW_BUCKET_COUNT;
+}
+
+bool CAddrInfo::IsTerrible(int64 nNow) const
+{
+ if (nLastTry && nLastTry >= nNow-60) // never remove things tried the last minute
+ return false;
+
+ if (nTime > nNow + 10*60) // came in a flying DeLorean
+ return true;
+
+ if (nTime==0 || nNow-nTime > ADDRMAN_HORIZON_DAYS*86400) // not seen in over a month
+ return true;
+
+ if (nLastSuccess==0 && nAttempts>=ADDRMAN_RETRIES) // tried three times and never a success
+ return true;
+
+ if (nNow-nLastSuccess > ADDRMAN_MIN_FAIL_DAYS*86400 && nAttempts>=ADDRMAN_MAX_FAILURES) // 10 successive failures in the last week
+ return true;
+
+ return false;
+}
+
+double CAddrInfo::GetChance(int64 nNow) const
+{
+ double fChance = 1.0;
+
+ int64 nSinceLastSeen = nNow - nTime;
+ int64 nSinceLastTry = nNow - nLastTry;
+
+ if (nSinceLastSeen < 0) nSinceLastSeen = 0;
+ if (nSinceLastTry < 0) nSinceLastTry = 0;
+
+ fChance *= 600.0 / (600.0 + nSinceLastSeen);
+
+ // deprioritize very recent attempts away
+ if (nSinceLastTry < 60*10)
+ fChance *= 0.01;
+
+ // deprioritize 50% after each failed attempt
+ for (int n=0; n<nAttempts; n++)
+ fChance /= 1.5;
+
+ return fChance;
+}
+
+CAddrInfo* CAddrMan::Find(const CNetAddr& addr, int *pnId)
+{
+ std::map<CNetAddr, int>::iterator it = mapAddr.find(addr);
+ if (it == mapAddr.end())
+ return NULL;
+ if (pnId)
+ *pnId = (*it).second;
+ std::map<int, CAddrInfo>::iterator it2 = mapInfo.find((*it).second);
+ if (it2 != mapInfo.end())
+ return &(*it2).second;
+ return NULL;
+}
+
+CAddrInfo* CAddrMan::Create(const CAddress &addr, const CNetAddr &addrSource, int *pnId)
+{
+ int nId = nIdCount++;
+ mapInfo[nId] = CAddrInfo(addr, addrSource);
+ mapAddr[addr] = nId;
+ mapInfo[nId].nRandomPos = vRandom.size();
+ vRandom.push_back(nId);
+ if (pnId)
+ *pnId = nId;
+ return &mapInfo[nId];
+}
+
+void CAddrMan::SwapRandom(int nRndPos1, int nRndPos2)
+{
+ if (nRndPos1 == nRndPos2)
+ return;
+
+ int nId1 = vRandom[nRndPos1];
+ int nId2 = vRandom[nRndPos2];
+
+ mapInfo[nId1].nRandomPos = nRndPos2;
+ mapInfo[nId2].nRandomPos = nRndPos1;
+
+ vRandom[nRndPos1] = nId2;
+ vRandom[nRndPos2] = nId1;
+}
+
+int CAddrMan::SelectTried(int nKBucket)
+{
+ std::vector<int> &vTried = vvTried[nKBucket];
+
+ // random shuffle the first few elements (using the entire list)
+ // find the least recently tried among them
+ int64 nOldest = -1;
+ for (int i=0; i<ADDRMAN_TRIED_ENTRIES_INSPECT_ON_EVICT && i<vTried.size(); i++)
+ {
+ int nPos = GetRandInt(vTried.size() - i) + i;
+ int nTemp = vTried[nPos];
+ vTried[nPos] = vTried[i];
+ vTried[i] = nTemp;
+ if (nOldest == -1 || mapInfo[nTemp].nLastSuccess < mapInfo[nOldest].nLastSuccess)
+ nOldest = nTemp;
+ }
+
+ return nOldest;
+}
+
+int CAddrMan::ShrinkNew(int nUBucket)
+{
+ std::set<int> &vNew = vvNew[nUBucket];
+
+ // first look for deletable items
+ for (std::set<int>::iterator it = vNew.begin(); it != vNew.end(); it++)
+ {
+ CAddrInfo &info = mapInfo[*it];
+ if (info.IsTerrible())
+ {
+ if (--info.nRefCount == 0)
+ {
+ SwapRandom(info.nRandomPos, vRandom.size()-1);
+ vRandom.pop_back();
+ mapAddr.erase(info);
+ mapInfo.erase(*it);
+ nNew--;
+ }
+ vNew.erase(it);
+ return 0;
+ }
+ }
+
+ // otherwise, select four randomly, and pick the oldest of those to replace
+ int n[4] = {GetRandInt(vNew.size()), GetRandInt(vNew.size()), GetRandInt(vNew.size()), GetRandInt(vNew.size())};
+ int nI = 0;
+ int nOldest = -1;
+ for (std::set<int>::iterator it = vNew.begin(); it != vNew.end(); it++)
+ {
+ if (nI == n[0] || nI == n[1] || nI == n[2] || nI == n[3])
+ {
+ if (nOldest == -1 || mapInfo[*it].nTime < mapInfo[nOldest].nTime)
+ nOldest = *it;
+ }
+ nI++;
+ }
+ CAddrInfo &info = mapInfo[nOldest];
+ if (--info.nRefCount == 0)
+ {
+ SwapRandom(info.nRandomPos, vRandom.size()-1);
+ vRandom.pop_back();
+ mapAddr.erase(info);
+ mapInfo.erase(nOldest);
+ nNew--;
+ }
+ vNew.erase(nOldest);
+
+ return 1;
+}
+
+void CAddrMan::MakeTried(CAddrInfo& info, int nId, int nOrigin)
+{
+ // remove the entry from all new buckets
+ for (std::vector<std::set<int> >::iterator it = vvNew.begin(); it != vvNew.end(); it++)
+ {
+ if ((*it).erase(nId))
+ info.nRefCount--;
+ }
+ nNew--;
+
+ // what tried bucket to move the entry to
+ int nKBucket = info.GetTriedBucket(nKey);
+ std::vector<int> &vTried = vvTried[nKBucket];
+
+ // first check whether there is place to just add it
+ if (vTried.size() < ADDRMAN_TRIED_BUCKET_SIZE)
+ {
+ vTried.push_back(nId);
+ nTried++;
+ info.fInTried = true;
+ return;
+ }
+
+ // otherwise, find an item to evict
+ int nPos = SelectTried(nKBucket);
+
+ // find which new bucket it belongs to
+ int nUBucket = mapInfo[vTried[nPos]].GetNewBucket(nKey);
+ std::set<int> &vNew = vvNew[nUBucket];
+
+ // remove the to-be-replaced tried entry from the tried set
+ CAddrInfo& infoOld = mapInfo[vTried[nPos]];
+ infoOld.fInTried = false;
+ infoOld.nRefCount = 1;
+ // do not update nTried, as we are going to move something else there immediately
+
+ // check whether there is place in that one,
+ if (vNew.size() < ADDRMAN_NEW_BUCKET_SIZE)
+ {
+ // if so, move it back there
+ vNew.insert(vTried[nPos]);
+ } else {
+ // otherwise, move it to the new bucket nId came from (there is certainly place there)
+ vvNew[nOrigin].insert(vTried[nPos]);
+ }
+ nNew++;
+
+ vTried[nPos] = nId;
+ // we just overwrote an entry in vTried; no need to update nTried
+ info.fInTried = true;
+ return;
+}
+
+void CAddrMan::Good_(const CService &addr, int64 nTime)
+{
+// printf("Good: addr=%s\n", addr.ToString().c_str());
+
+ int nId;
+ CAddrInfo *pinfo = Find(addr, &nId);
+
+ // 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.nLastSuccess = nTime;
+ info.nLastTry = nTime;
+ info.nTime = nTime;
+ info.nAttempts = 0;
+
+ // if it is already in the tried set, don't do anything else
+ if (info.fInTried)
+ return;
+
+ // find a bucket it is in now
+ int nRnd = GetRandInt(vvNew.size());
+ int nUBucket = -1;
+ for (int n = 0; n < vvNew.size(); n++)
+ {
+ int nB = (n+nRnd) % vvNew.size();
+ std::set<int> &vNew = vvNew[nB];
+ if (vNew.count(nId))
+ {
+ nUBucket = nB;
+ break;
+ }
+ }
+
+ // if no bucket is found, something bad happened;
+ // TODO: maybe re-add the node, but for now, just bail out
+ if (nUBucket == -1) return;
+
+ printf("Moving %s to tried\n", addr.ToString().c_str());
+
+ // move nId to the tried tables
+ MakeTried(info, nId, nUBucket);
+}
+
+bool CAddrMan::Add_(const CAddress &addr, const CNetAddr& source, int64 nTimePenalty)
+{
+ if (!addr.IsRoutable())
+ return false;
+
+ bool fNew = false;
+ int nId;
+ CAddrInfo *pinfo = Find(addr, &nId);
+
+ if (pinfo)
+ {
+ // periodically update nTime
+ bool fCurrentlyOnline = (GetAdjustedTime() - addr.nTime < 24 * 60 * 60);
+ int64 nUpdateInterval = (fCurrentlyOnline ? 60 * 60 : 24 * 60 * 60);
+ if (addr.nTime && (!pinfo->nTime || pinfo->nTime < addr.nTime - nUpdateInterval - nTimePenalty))
+ pinfo->nTime = max((int64)0, addr.nTime - nTimePenalty);
+
+ // add services
+ pinfo->nServices |= addr.nServices;
+
+ // do not update if no new information is present
+ if (!addr.nTime || pinfo->nTime && addr.nTime <= pinfo->nTime)
+ return false;
+
+ // do not update if the entry was already in the "tried" table
+ if (pinfo->fInTried)
+ return false;
+
+ // do not update if the max reference count is reached
+ if (pinfo->nRefCount == ADDRMAN_NEW_BUCKETS_PER_ADDRESS)
+ return false;
+
+ // stochastic test: previous nRefCount == N: 2^N times harder to increase it
+ int nFactor = 1;
+ for (int n=0; n<pinfo->nRefCount; n++)
+ nFactor *= 2;
+ if (nFactor > 1 && (GetRandInt(nFactor) != 0))
+ return false;
+ } else {
+ pinfo = Create(addr, source, &nId);
+ pinfo->nTime = max((int64)0, (int64)pinfo->nTime - nTimePenalty);
+// printf("Added %s [nTime=%fhr]\n", pinfo->ToString().c_str(), (GetAdjustedTime() - pinfo->nTime) / 3600.0);
+ nNew++;
+ fNew = true;
+ }
+
+ int nUBucket = pinfo->GetNewBucket(nKey, source);
+ std::set<int> &vNew = vvNew[nUBucket];
+ if (!vNew.count(nId))
+ {
+ pinfo->nRefCount++;
+ if (vNew.size() == ADDRMAN_NEW_BUCKET_SIZE)
+ ShrinkNew(nUBucket);
+ vvNew[nUBucket].insert(nId);
+ }
+ return fNew;
+}
+
+void CAddrMan::Attempt_(const CService &addr, int64 nTime)
+{
+ 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.nLastTry = nTime;
+ info.nAttempts++;
+}
+
+CAddress CAddrMan::Select_(int nUnkBias)
+{
+ if (size() == 0)
+ return CAddress();
+
+ double nCorTried = sqrt(nTried) * (100.0 - nUnkBias);
+ double nCorNew = sqrt(nNew) * nUnkBias;
+ if ((nCorTried + nCorNew)*GetRandInt(1<<30)/(1<<30) < nCorTried)
+ {
+ // use a tried node
+ double fChanceFactor = 1.0;
+ while(1)
+ {
+ int nKBucket = GetRandInt(vvTried.size());
+ std::vector<int> &vTried = vvTried[nKBucket];
+ if (vTried.size() == 0) continue;
+ int nPos = GetRandInt(vTried.size());
+ CAddrInfo &info = mapInfo[vTried[nPos]];
+ if (GetRandInt(1<<30) < fChanceFactor*info.GetChance()*(1<<30))
+ return info;
+ fChanceFactor *= 1.2;
+ }
+ } else {
+ // use an new node
+ double fChanceFactor = 1.0;
+ while(1)
+ {
+ int nUBucket = GetRandInt(vvNew.size());
+ std::set<int> &vNew = vvNew[nUBucket];
+ if (vNew.size() == 0) continue;
+ int nPos = GetRandInt(vNew.size());
+ std::set<int>::iterator it = vNew.begin();
+ while (nPos--)
+ it++;
+ CAddrInfo &info = mapInfo[*it];
+ if (GetRandInt(1<<30) < fChanceFactor*info.GetChance()*(1<<30))
+ return info;
+ fChanceFactor *= 1.2;
+ }
+ }
+}
+
+#ifdef DEBUG_ADDRMAN
+int CAddrMan::Check_()
+{
+ std::set<int> setTried;
+ std::map<int, int> mapNew;
+
+ if (vRandom.size() != nTried + nNew) return -7;
+
+ for (std::map<int, CAddrInfo>::iterator it = mapInfo.begin(); it != mapInfo.end(); it++)
+ {
+ int n = (*it).first;
+ CAddrInfo &info = (*it).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 || 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() != nTried) return -9;
+ if (mapNew.size() != nNew) return -10;
+
+ for (int n=0; n<vvTried.size(); n++)
+ {
+ std::vector<int> &vTried = vvTried[n];
+ for (std::vector<int>::iterator it = vTried.begin(); it != vTried.end(); it++)
+ {
+ if (!setTried.count(*it)) return -11;
+ setTried.erase(*it);
+ }
+ }
+
+ for (int n=0; n<vvNew.size(); n++)
+ {
+ std::set<int> &vNew = vvNew[n];
+ for (std::set<int>::iterator it = vNew.begin(); it != vNew.end(); it++)
+ {
+ if (!mapNew.count(*it)) return -12;
+ if (--mapNew[*it] == 0)
+ mapNew.erase(*it);
+ }
+ }
+
+ if (setTried.size()) return -13;
+ if (mapNew.size()) return -15;
+
+ return 0;
+}
+#endif
+
+void CAddrMan::GetAddr_(std::vector<CAddress> &vAddr)
+{
+ int nNodes = ADDRMAN_GETADDR_MAX_PCT*vRandom.size()/100;
+ if (nNodes > ADDRMAN_GETADDR_MAX)
+ nNodes = ADDRMAN_GETADDR_MAX;
+
+ // perform a random shuffle over the first nNodes elements of vRandom (selecting from all)
+ for (int n = 0; n<nNodes; n++)
+ {
+ int nRndPos = GetRandInt(vRandom.size() - n) + n;
+ SwapRandom(n, nRndPos);
+ vAddr.push_back(mapInfo[vRandom[n]]);
+ }
+}
+
+void CAddrMan::Connected_(const CService &addr, int64 nTime)
+{
+ 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 nUpdateInterval = 20 * 60;
+ if (nTime - info.nTime > nUpdateInterval)
+ info.nTime = nTime;
+}
diff --git a/src/addrman.h b/src/addrman.h
new file mode 100644
index 0000000000..350ecb2709
--- /dev/null
+++ b/src/addrman.h
@@ -0,0 +1,499 @@
+// Copyright (c) 2012 Pieter Wuille
+// Distributed under the MIT/X11 software license, see the accompanying
+// file license.txt or http://www.opensource.org/licenses/mit-license.php.
+#ifndef _BITCOIN_ADDRMAN
+#define _BITCOIN_ADDRMAN 1
+
+#include "netbase.h"
+#include "protocol.h"
+#include "util.h"
+
+
+#include <map>
+#include <vector>
+
+#include <openssl/rand.h>
+
+
+// Extended statistics about a CAddress
+class CAddrInfo : public CAddress
+{
+private:
+ // where knowledge about this address first came from
+ CNetAddr source;
+
+ // last succesfull connection by us
+ int64 nLastSuccess;
+
+ // last try whatsoever by us:
+ // int64 CAddress::nLastTry
+
+ // connection attempts since last succesful attempt
+ int nAttempts;
+
+ // reference count in new sets (memory only)
+ int nRefCount;
+
+ // in tried set? (memory only)
+ bool fInTried;
+
+ // position in vRandom
+ int nRandomPos;
+
+ friend class CAddrMan;
+
+public:
+
+ IMPLEMENT_SERIALIZE(
+ CAddress* pthis = (CAddress*)(this);
+ READWRITE(*pthis);
+ READWRITE(source);
+ READWRITE(nLastSuccess);
+ READWRITE(nAttempts);
+ )
+
+ void Init()
+ {
+ nLastSuccess = 0;
+ nLastTry = 0;
+ nAttempts = 0;
+ nRefCount = 0;
+ fInTried = false;
+ nRandomPos = -1;
+ }
+
+ CAddrInfo(const CAddress &addrIn, const CNetAddr &addrSource) : CAddress(addrIn)
+ {
+ Init();
+ }
+
+ CAddrInfo() : CAddress(), source()
+ {
+ Init();
+ }
+
+ // Calculate in which "tried" bucket this entry belongs
+ int GetTriedBucket(const std::vector<unsigned char> &nKey) const;
+
+ // Calculate in which "new" bucket this entry belongs, given a certain source
+ int GetNewBucket(const std::vector<unsigned char> &nKey, const CNetAddr& src) const;
+
+ // Calculate in which "new" bucket this entry belongs, using its default source
+ int GetNewBucket(const std::vector<unsigned char> &nKey) const
+ {
+ return GetNewBucket(nKey, source);
+ }
+
+ // Determine whether the statistics about this entry are bad enough so that it can just be deleted
+ bool IsTerrible(int64 nNow = GetAdjustedTime()) const;
+
+ // Calculate the relative chance this entry should be given when selecting nodes to connect to
+ double GetChance(int64 nNow = GetAdjustedTime()) const;
+
+};
+
+// Stochastic address manager
+//
+// Design goals:
+// * Only keep a limited number of addresses around, so that addr.dat and memory requirements do not grow without bound.
+// * Keep the address tables in-memory, and asynchronously dump the entire to able in addr.dat.
+// * Make sure no (localized) attacker can fill the entire table with his nodes/addresses.
+//
+// To that end:
+// * Addresses are organized into buckets.
+// * Address that have not yet been tried go into 256 "new" buckets.
+// * Based on the address range (/16 for IPv4) of source of the information, 32 buckets are selected at random
+// * The actual bucket is chosen from one of these, based on the range the address itself is located.
+// * One single address can occur in up to 4 different buckets, to increase selection chances for addresses that
+// are seen frequently. The chance for increasing this multiplicity decreases exponentially.
+// * When adding a new address to a full bucket, a randomly chosen entry (with a bias favoring less recently seen
+// ones) is removed from it first.
+// * Addresses of nodes that are known to be accessible go into 64 "tried" buckets.
+// * Each address range selects at random 4 of these buckets.
+// * The actual bucket is chosen from one of these, based on the full address.
+// * When adding a new good address to a full bucket, a randomly chosen entry (with a bias favoring less recently
+// tried ones) is evicted from it, back to the "new" buckets.
+// * Bucket selection is based on cryptographic hashing, using a randomly-generated 256-bit key, which should not
+// be observable by adversaries.
+// * Several indexes are kept for high performance. Defining DEBUG_ADDRMAN will introduce frequent (and expensive)
+// consistency checks for the entire datastructure.
+
+// total number of buckets for tried addresses
+#define ADDRMAN_TRIED_BUCKET_COUNT 64
+
+// maximum allowed number of entries in buckets for tried addresses
+#define ADDRMAN_TRIED_BUCKET_SIZE 64
+
+// total number of buckets for new addresses
+#define ADDRMAN_NEW_BUCKET_COUNT 256
+
+// maximum allowed number of entries in buckets for new addresses
+#define ADDRMAN_NEW_BUCKET_SIZE 64
+
+// over how many buckets entries with tried addresses from a single group (/16 for IPv4) are spread
+#define ADDRMAN_TRIED_BUCKETS_PER_GROUP 4
+
+// over how many buckets entries with new addresses originating from a single group are spread
+#define ADDRMAN_NEW_BUCKETS_PER_SOURCE_GROUP 32
+
+// in how many buckets for entries with new addresses a single address may occur
+#define ADDRMAN_NEW_BUCKETS_PER_ADDRESS 4
+
+// how many entries in a bucket with tried addresses are inspected, when selecting one to replace
+#define ADDRMAN_TRIED_ENTRIES_INSPECT_ON_EVICT 4
+
+// how old addresses can maximally be
+#define ADDRMAN_HORIZON_DAYS 30
+
+// after how many failed attempts we give up on a new node
+#define ADDRMAN_RETRIES 3
+
+// how many successive failures are allowed ...
+#define ADDRMAN_MAX_FAILURES 10
+
+// ... in at least this many days
+#define ADDRMAN_MIN_FAIL_DAYS 7
+
+// the maximum percentage of nodes to return in a getaddr call
+#define ADDRMAN_GETADDR_MAX_PCT 23
+
+// the maximum number of nodes to return in a getaddr call
+#define ADDRMAN_GETADDR_MAX 2500
+
+class CAddrMan
+{
+private:
+ // critical section to protect the inner data structures
+ mutable CCriticalSection cs;
+
+ // secret key to randomize bucket select with
+ std::vector<unsigned char> nKey;
+
+ // last used nId
+ int nIdCount;
+
+ // table with information about all nId's
+ std::map<int, CAddrInfo> mapInfo;
+
+ // find an nId based on its network address
+ std::map<CNetAddr, int> mapAddr;
+
+ // randomly-ordered vector of all nId's
+ std::vector<int> vRandom;
+
+ // number of "tried" entries
+ int nTried;
+
+ // list of "tried" buckets
+ std::vector<std::vector<int> > vvTried;
+
+ // number of (unique) "new" entries
+ int nNew;
+
+ // list of "new" buckets
+ std::vector<std::set<int> > vvNew;
+
+protected:
+
+ // Find an entry.
+ CAddrInfo* Find(const CNetAddr& addr, int *pnId = NULL);
+
+ // find an entry, creating it if necessary.
+ // nTime and nServices of found node is updated, if necessary.
+ CAddrInfo* Create(const CAddress &addr, const CNetAddr &addrSource, int *pnId = NULL);
+
+ // Swap two elements in vRandom.
+ void SwapRandom(int nRandomPos1, int nRandomPos2);
+
+ // Return position in given bucket to replace.
+ int SelectTried(int nKBucket);
+
+ // Remove an element from a "new" bucket.
+ // This is the only place where actual deletes occur.
+ // They are never deleted while in the "tried" table, only possibly evicted back to the "new" table.
+ int ShrinkNew(int nUBucket);
+
+ // Move an entry from the "new" table(s) to the "tried" table
+ // @pre vvUnkown[nOrigin].count(nId) != 0
+ void MakeTried(CAddrInfo& info, int nId, int nOrigin);
+
+ // Mark an entry "good", possibly moving it from "new" to "tried".
+ void Good_(const CService &addr, int64 nTime);
+
+ // Add an entry to the "new" table.
+ bool Add_(const CAddress &addr, const CNetAddr& source, int64 nTimePenalty);
+
+ // Mark an entry as attempted to connect.
+ void Attempt_(const CService &addr, int64 nTime);
+
+ // Select an address to connect to.
+ // nUnkBias determines how much to favor new addresses over tried ones (min=0, max=100)
+ CAddress Select_(int nUnkBias);
+
+#ifdef DEBUG_ADDRMAN
+ // Perform consistency check. Returns an error code or zero.
+ int Check_();
+#endif
+
+ // Select several addresses at once.
+ void GetAddr_(std::vector<CAddress> &vAddr);
+
+ // Mark an entry as currently-connected-to.
+ void Connected_(const CService &addr, int64 nTime);
+
+public:
+
+ IMPLEMENT_SERIALIZE
+ (({
+ // serialized format:
+ // * version byte (currently 0)
+ // * nKey
+ // * nNew
+ // * nTried
+ // * number of "new" buckets
+ // * all nNew addrinfo's in vvNew
+ // * all nTried addrinfo's in vvTried
+ // * for each bucket:
+ // * number of elements
+ // * for each element: index
+ //
+ // Notice that vvTried, mapAddr and vVector are never encoded explicitly;
+ // they are instead reconstructed from the other information.
+ //
+ // vvNew is serialized, but only used if ADDRMAN_UNKOWN_BUCKET_COUNT didn't change,
+ // otherwise it is reconstructed as well.
+ //
+ // This format is more complex, but significantly smaller (at most 1.5 MiB), and supports
+ // changes to the ADDRMAN_ parameters without breaking the on-disk structure.
+ CRITICAL_BLOCK(cs)
+ {
+ unsigned char nVersion = 0;
+ READWRITE(nVersion);
+ READWRITE(nKey);
+ READWRITE(nNew);
+ READWRITE(nTried);
+
+ CAddrMan *am = const_cast<CAddrMan*>(this);
+ if (fWrite)
+ {
+ int nUBuckets = ADDRMAN_NEW_BUCKET_COUNT;
+ READWRITE(nUBuckets);
+ std::map<int, int> mapUnkIds;
+ int nIds = 0;
+ for (std::map<int, CAddrInfo>::iterator it = am->mapInfo.begin(); it != am->mapInfo.end(); it++)
+ {
+ if (nIds == nNew) break; // this means nNew was wrong, oh ow
+ mapUnkIds[(*it).first] = nIds;
+ CAddrInfo &info = (*it).second;
+ if (info.nRefCount)
+ {
+ READWRITE(info);
+ nIds++;
+ }
+ }
+ nIds = 0;
+ for (std::map<int, CAddrInfo>::iterator it = am->mapInfo.begin(); it != am->mapInfo.end(); it++)
+ {
+ if (nIds == nTried) break; // this means nTried was wrong, oh ow
+ CAddrInfo &info = (*it).second;
+ if (info.fInTried)
+ {
+ READWRITE(info);
+ nIds++;
+ }
+ }
+ for (std::vector<std::set<int> >::iterator it = am->vvNew.begin(); it != am->vvNew.end(); it++)
+ {
+ const std::set<int> &vNew = (*it);
+ int nSize = vNew.size();
+ READWRITE(nSize);
+ for (std::set<int>::iterator it2 = vNew.begin(); it2 != vNew.end(); it2++)
+ {
+ int nIndex = mapUnkIds[*it2];
+ READWRITE(nIndex);
+ }
+ }
+ } else {
+ int nUBuckets = 0;
+ READWRITE(nUBuckets);
+ am->nIdCount = 0;
+ am->mapInfo.clear();
+ am->mapAddr.clear();
+ am->vRandom.clear();
+ am->vvTried = std::vector<std::vector<int> >(ADDRMAN_TRIED_BUCKET_COUNT, std::vector<int>(0));
+ am->vvNew = std::vector<std::set<int> >(ADDRMAN_NEW_BUCKET_COUNT, std::set<int>());
+ for (int n = 0; n < am->nNew; n++)
+ {
+ CAddrInfo &info = am->mapInfo[n];
+ READWRITE(info);
+ am->mapAddr[info] = n;
+ info.nRandomPos = vRandom.size();
+ am->vRandom.push_back(n);
+ if (nUBuckets != ADDRMAN_NEW_BUCKET_COUNT)
+ {
+ am->vvNew[info.GetNewBucket(am->nKey)].insert(n);
+ info.nRefCount++;
+ }
+ }
+ am->nIdCount = am->nNew;
+ int nLost = 0;
+ for (int n = 0; n < am->nTried; n++)
+ {
+ CAddrInfo info;
+ READWRITE(info);
+ std::vector<int> &vTried = am->vvTried[info.GetTriedBucket(am->nKey)];
+ if (vTried.size() < ADDRMAN_TRIED_BUCKET_SIZE)
+ {
+ info.nRandomPos = vRandom.size();
+ info.fInTried = true;
+ am->vRandom.push_back(am->nIdCount);
+ am->mapInfo[am->nIdCount] = info;
+ am->mapAddr[info] = am->nIdCount;
+ vTried.push_back(am->nIdCount);
+ am->nIdCount++;
+ } else {
+ nLost++;
+ }
+ }
+ am->nTried -= nLost;
+ for (int b = 0; b < nUBuckets; b++)
+ {
+ std::set<int> &vNew = am->vvNew[b];
+ int nSize = 0;
+ READWRITE(nSize);
+ for (int n = 0; n < nSize; n++)
+ {
+ int nIndex = 0;
+ READWRITE(nIndex);
+ CAddrInfo &info = am->mapInfo[nIndex];
+ if (nUBuckets == ADDRMAN_NEW_BUCKET_COUNT && info.nRefCount < ADDRMAN_NEW_BUCKETS_PER_ADDRESS)
+ {
+ info.nRefCount++;
+ vNew.insert(nIndex);
+ }
+ }
+ }
+ }
+ }
+ });)
+
+ CAddrMan() : vRandom(0), vvTried(ADDRMAN_TRIED_BUCKET_COUNT, std::vector<int>(0)), vvNew(ADDRMAN_NEW_BUCKET_COUNT, std::set<int>())
+ {
+ nKey.resize(32);
+ RAND_bytes(&nKey[0], 32);
+
+ nIdCount = 0;
+ nTried = 0;
+ nNew = 0;
+ }
+
+ // Return the number of (unique) addresses in all tables.
+ int size()
+ {
+ return vRandom.size();
+ }
+
+ // Consistency check
+ void Check()
+ {
+#ifdef DEBUG_ADDRMAN
+ CRITICAL_BLOCK(cs)
+ {
+ int err;
+ if ((err=Check_()))
+ printf("ADDRMAN CONSISTENCY CHECK FAILED!!! err=%i\n", err);
+ }
+#endif
+ }
+
+ // Add a single address.
+ bool Add(const CAddress &addr, const CNetAddr& source, int64 nTimePenalty = 0)
+ {
+ bool fRet = false;
+ CRITICAL_BLOCK(cs)
+ {
+ Check();
+ fRet |= Add_(addr, source, nTimePenalty);
+ Check();
+ }
+ if (fRet)
+ printf("Added %s from %s: %i tried, %i new\n", addr.ToStringIPPort().c_str(), source.ToString().c_str(), nTried, nNew);
+ return fRet;
+ }
+
+ // Add multiple addresses.
+ bool Add(const std::vector<CAddress> &vAddr, const CNetAddr& source, int64 nTimePenalty = 0)
+ {
+ int nAdd = 0;
+ CRITICAL_BLOCK(cs)
+ {
+ Check();
+ for (std::vector<CAddress>::const_iterator it = vAddr.begin(); it != vAddr.end(); it++)
+ nAdd += Add_(*it, source, nTimePenalty) ? 1 : 0;
+ Check();
+ }
+ if (nAdd)
+ printf("Added %i addresses from %s: %i tried, %i new\n", nAdd, source.ToString().c_str(), nTried, nNew);
+ return nAdd > 0;
+ }
+
+ // Mark an entry as accessible.
+ void Good(const CService &addr, int64 nTime = GetAdjustedTime())
+ {
+ CRITICAL_BLOCK(cs)
+ {
+ Check();
+ Good_(addr, nTime);
+ Check();
+ }
+ }
+
+ // Mark an entry as connection attempted to.
+ void Attempt(const CService &addr, int64 nTime = GetAdjustedTime())
+ {
+ CRITICAL_BLOCK(cs)
+ {
+ Check();
+ Attempt_(addr, nTime);
+ Check();
+ }
+ }
+
+ // Choose an address to connect to.
+ // nUnkBias determines how much "new" entries are favored over "tried" ones (0-100).
+ CAddress Select(int nUnkBias = 50)
+ {
+ CAddress addrRet;
+ CRITICAL_BLOCK(cs)
+ {
+ Check();
+ addrRet = Select_(nUnkBias);
+ Check();
+ }
+ return addrRet;
+ }
+
+ // Return a bunch of addresses, selected at random.
+ std::vector<CAddress> GetAddr()
+ {
+ Check();
+ std::vector<CAddress> vAddr;
+ CRITICAL_BLOCK(cs)
+ GetAddr_(vAddr);
+ Check();
+ return vAddr;
+ }
+
+ // Mark an entry as currently-connected-to.
+ void Connected(const CService &addr, int64 nTime = GetAdjustedTime())
+ {
+ CRITICAL_BLOCK(cs)
+ {
+ Check();
+ Connected_(addr, nTime);
+ Check();
+ }
+ }
+};
+
+#endif
diff --git a/src/db.cpp b/src/db.cpp
index ea6d46a6e5..645f725153 100644
--- a/src/db.cpp
+++ b/src/db.cpp
@@ -621,44 +621,65 @@ bool CAddrDB::WriteAddress(const CAddress& addr)
return Write(make_pair(string("addr"), addr.GetKey()), addr);
}
+bool CAddrDB::WriteAddrman(const CAddrMan& addrman)
+{
+ return Write(string("addrman"), addrman);
+}
+
bool CAddrDB::EraseAddress(const CAddress& addr)
{
return Erase(make_pair(string("addr"), addr.GetKey()));
}
-bool CAddrDB::LoadAddresses()
+bool CAddrDB::LoadAddresses(bool &fUpdate)
{
- CRITICAL_BLOCK(cs_mapAddresses)
+ bool fAddrMan = false;
+ if (Read(string("addrman"), addrman))
{
- // Get cursor
- Dbc* pcursor = GetCursor();
- if (!pcursor)
+ printf("Loaded %i addresses\n", addrman.size());
+ fAddrMan = true;
+ }
+
+ vector<CAddress> vAddr;
+
+ // Get cursor
+ Dbc* pcursor = GetCursor();
+ if (!pcursor)
+ return false;
+
+ loop
+ {
+ // Read next record
+ CDataStream ssKey;
+ CDataStream ssValue;
+ int ret = ReadAtCursor(pcursor, ssKey, ssValue);
+ if (ret == DB_NOTFOUND)
+ break;
+ else if (ret != 0)
return false;
- loop
+ // Unserialize
+ string strType;
+ ssKey >> strType;
+ if (strType == "addr")
{
- // Read next record
- CDataStream ssKey;
- CDataStream ssValue;
- int ret = ReadAtCursor(pcursor, ssKey, ssValue);
- if (ret == DB_NOTFOUND)
- break;
- else if (ret != 0)
- return false;
-
- // Unserialize
- string strType;
- ssKey >> strType;
- if (strType == "addr")
+ if (fAddrMan)
+ fUpdate = true;
+ else
{
CAddress addr;
ssValue >> addr;
- mapAddresses.insert(make_pair(addr.GetKey(), addr));
+ vAddr.push_back(addr);
}
+
}
- pcursor->close();
+ }
+ pcursor->close();
- printf("Loaded %d addresses\n", mapAddresses.size());
+ if (!fAddrMan)
+ {
+ addrman.Add(vAddr, CNetAddr("0.0.0.0"));
+ printf("Loaded %i addresses\n", addrman.size());
}
return true;
@@ -666,7 +687,11 @@ bool CAddrDB::LoadAddresses()
bool LoadAddresses()
{
- return CAddrDB("cr+").LoadAddresses();
+ bool fUpdate = false;
+ bool fRet = CAddrDB("cr+").LoadAddresses(fUpdate);
+ if (fUpdate)
+ CDB::Rewrite("addr.dat", "\004addr");
+ return fRet;
}
diff --git a/src/db.h b/src/db.h
index 2611faa461..81f7a98c33 100644
--- a/src/db.h
+++ b/src/db.h
@@ -16,6 +16,7 @@
class CAccount;
class CAccountingEntry;
class CAddress;
+class CAddrMan;
class CBlockLocator;
class CDiskBlockIndex;
class CDiskTxPos;
@@ -307,7 +308,8 @@ private:
public:
bool WriteAddress(const CAddress& addr);
bool EraseAddress(const CAddress& addr);
- bool LoadAddresses();
+ bool WriteAddrman(const CAddrMan& addr);
+ bool LoadAddresses(bool &fUpdate);
};
bool LoadAddresses();
diff --git a/src/init.cpp b/src/init.cpp
index b2c59ec4ec..2b21f6d593 100644
--- a/src/init.cpp
+++ b/src/init.cpp
@@ -543,7 +543,7 @@ bool AppInit2(int argc, char* argv[])
CAddress addr(CService(strAddr, GetDefaultPort(), fAllowDNS));
addr.nTime = 0; // so it won't relay unless successfully connected
if (addr.IsValid())
- AddAddress(addr);
+ addrman.Add(addr, CNetAddr("127.0.0.1"));
}
}
diff --git a/src/irc.cpp b/src/irc.cpp
index 7a6f40cfad..09bacc1658 100644
--- a/src/irc.cpp
+++ b/src/irc.cpp
@@ -341,7 +341,7 @@ void ThreadIRCSeed2(void* parg)
if (DecodeAddress(pszName, addr))
{
addr.nTime = GetAdjustedTime();
- if (AddAddress(addr, 51 * 60))
+ if (addrman.Add(addr, addrConnect, 51 * 60))
printf("IRC got new address: %s\n", addr.ToString().c_str());
nGotIRCAddresses++;
}
diff --git a/src/main.cpp b/src/main.cpp
index a9311e2ceb..a8fabc3535 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -2155,11 +2155,18 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv)
}
// Get recent addresses
- if (pfrom->nVersion >= 31402 || mapAddresses.size() < 1000)
+ if (pfrom->nVersion >= 31402 || addrman.size() < 1000)
{
pfrom->PushMessage("getaddr");
pfrom->fGetAddr = true;
}
+ addrman.Good(pfrom->addr);
+ } else {
+ if (((CNetAddr)pfrom->addr) == (CNetAddr)addrFrom)
+ {
+ addrman.Add(addrFrom, addrFrom);
+ addrman.Good(addrFrom);
+ }
}
// Ask the first connected node for block updates
@@ -2205,7 +2212,7 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv)
vRecv >> vAddr;
// Don't want addr from older versions unless seeding
- if (pfrom->nVersion < 31402 && mapAddresses.size() > 1000)
+ if (pfrom->nVersion < 31402 && addrman.size() > 1000)
return true;
if (vAddr.size() > 1000)
{
@@ -2214,8 +2221,6 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv)
}
// Store the new addresses
- CAddrDB addrDB;
- addrDB.TxnBegin();
int64 nNow = GetAdjustedTime();
int64 nSince = nNow - 10 * 60;
BOOST_FOREACH(CAddress& addr, vAddr)
@@ -2227,7 +2232,6 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv)
continue;
if (addr.nTime <= 100000000 || addr.nTime > nNow + 10 * 60)
addr.nTime = nNow - 5 * 24 * 60 * 60;
- AddAddress(addr, 2 * 60 * 60, &addrDB);
pfrom->AddAddressKnown(addr);
if (addr.nTime > nSince && !pfrom->fGetAddr && vAddr.size() <= 10 && addr.IsRoutable())
{
@@ -2259,7 +2263,7 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv)
}
}
}
- addrDB.TxnCommit(); // Save addresses (it's ok if this fails)
+ addrman.Add(vAddr, pfrom->addr, 2 * 60 * 60);
if (vAddr.size() < 1000)
pfrom->fGetAddr = false;
}
@@ -2500,25 +2504,10 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv)
else if (strCommand == "getaddr")
{
- // Nodes rebroadcast an addr every 24 hours
pfrom->vAddrToSend.clear();
- int64 nSince = GetAdjustedTime() - 3 * 60 * 60; // in the last 3 hours
- CRITICAL_BLOCK(cs_mapAddresses)
- {
- unsigned int nCount = 0;
- BOOST_FOREACH(const PAIRTYPE(vector<unsigned char>, CAddress)& item, mapAddresses)
- {
- const CAddress& addr = item.second;
- if (addr.nTime > nSince)
- nCount++;
- }
- BOOST_FOREACH(const PAIRTYPE(vector<unsigned char>, CAddress)& item, mapAddresses)
- {
- const CAddress& addr = item.second;
- if (addr.nTime > nSince && GetRand(nCount) < 2500)
- pfrom->PushAddress(addr);
- }
- }
+ vector<CAddress> vAddr = addrman.GetAddr();
+ BOOST_FOREACH(const CAddress &addr, vAddr)
+ pfrom->PushAddress(addr);
}
@@ -2760,35 +2749,6 @@ bool SendMessages(CNode* pto, bool fSendTrickle)
nLastRebroadcast = GetTime();
}
- // Clear out old addresses periodically so it's not too much work at once
- static int64 nLastClear;
- if (nLastClear == 0)
- nLastClear = GetTime();
- if (GetTime() - nLastClear > 10 * 60 && vNodes.size() >= 3)
- {
- nLastClear = GetTime();
- CRITICAL_BLOCK(cs_mapAddresses)
- {
- CAddrDB addrdb;
- int64 nSince = GetAdjustedTime() - 14 * 24 * 60 * 60;
- for (map<vector<unsigned char>, CAddress>::iterator mi = mapAddresses.begin();
- mi != mapAddresses.end();)
- {
- const CAddress& addr = (*mi).second;
- if (addr.nTime < nSince)
- {
- if (mapAddresses.size() < 1000 || GetTime() > nLastClear + 20)
- break;
- addrdb.EraseAddress(addr);
- mapAddresses.erase(mi++);
- }
- else
- mi++;
- }
- }
- }
-
-
//
// Message: addr
//
diff --git a/src/makefile.linux-mingw b/src/makefile.linux-mingw
index 9212698018..40ce1dcdca 100644
--- a/src/makefile.linux-mingw
+++ b/src/makefile.linux-mingw
@@ -45,6 +45,7 @@ HEADERS = $(wildcard *.h)
OBJS= \
obj/checkpoints.o \
obj/netbase.o \
+ obj/addrman.o \
obj/crypter.o \
obj/key.o \
obj/db.o \
diff --git a/src/makefile.mingw b/src/makefile.mingw
index c55e17a36e..f7dfcc74c1 100644
--- a/src/makefile.mingw
+++ b/src/makefile.mingw
@@ -43,6 +43,7 @@ HEADERS = $(wildcard *.h)
OBJS= \
obj/checkpoints.o \
obj/netbase.o \
+ obj/addrman.o \
obj/crypter.o \
obj/key.o \
obj/db.o \
diff --git a/src/makefile.osx b/src/makefile.osx
index 9943271a29..8790d92ce4 100644
--- a/src/makefile.osx
+++ b/src/makefile.osx
@@ -60,6 +60,7 @@ CFLAGS=-mmacosx-version-min=10.5 -arch i386 -O3 \
OBJS= \
obj/checkpoints.o \
obj/netbase.o \
+ obj/addrman.o \
obj/crypter.o \
obj/key.o \
obj/db.o \
diff --git a/src/makefile.unix b/src/makefile.unix
index 80b5bca341..8d354602d4 100644
--- a/src/makefile.unix
+++ b/src/makefile.unix
@@ -91,6 +91,7 @@ xCXXFLAGS=-pthread -Wextra -Wno-sign-compare -Wno-char-subscripts -Wno-invalid-o
OBJS= \
obj/checkpoints.o \
obj/netbase.o \
+ obj/addrman.o \
obj/crypter.o \
obj/key.o \
obj/db.o \
diff --git a/src/net.cpp b/src/net.cpp
index 546bc6adc8..08edafb399 100644
--- a/src/net.cpp
+++ b/src/net.cpp
@@ -9,6 +9,7 @@
#include "net.h"
#include "init.h"
#include "strlcpy.h"
+#include "addrman.h"
#ifdef WIN32
#include <string.h>
@@ -49,11 +50,10 @@ static CNode* pnodeLocalHost = NULL;
uint64 nLocalHostNonce = 0;
array<int, THREAD_MAX> vnThreadsRunning;
static SOCKET hListenSocket = INVALID_SOCKET;
+CAddrMan addrman;
vector<CNode*> vNodes;
CCriticalSection cs_vNodes;
-map<vector<unsigned char>, CAddress> mapAddresses;
-CCriticalSection cs_mapAddresses;
map<CInv, CDataStream> mapRelay;
deque<pair<int64, CInv> > vRelayExpiration;
CCriticalSection cs_mapRelay;
@@ -279,86 +279,9 @@ void ThreadGetMyExternalIP(void* parg)
-bool AddAddress(CAddress addr, int64 nTimePenalty, CAddrDB *pAddrDB)
-{
- if (!addr.IsRoutable())
- return false;
- if ((CService)addr == (CService)addrLocalHost)
- return false;
- addr.nTime = max((int64)0, (int64)addr.nTime - nTimePenalty);
- bool fUpdated = false;
- bool fNew = false;
- CAddress addrFound = addr;
-
- CRITICAL_BLOCK(cs_mapAddresses)
- {
- map<vector<unsigned char>, CAddress>::iterator it = mapAddresses.find(addr.GetKey());
- if (it == mapAddresses.end())
- {
- // New address
- printf("AddAddress(%s)\n", addr.ToString().c_str());
- mapAddresses.insert(make_pair(addr.GetKey(), addr));
- fUpdated = true;
- fNew = true;
- }
- else
- {
- addrFound = (*it).second;
- if ((addrFound.nServices | addr.nServices) != addrFound.nServices)
- {
- // Services have been added
- addrFound.nServices |= addr.nServices;
- fUpdated = true;
- }
- bool fCurrentlyOnline = (GetAdjustedTime() - addr.nTime < 24 * 60 * 60);
- int64 nUpdateInterval = (fCurrentlyOnline ? 60 * 60 : 24 * 60 * 60);
- if (addrFound.nTime < addr.nTime - nUpdateInterval)
- {
- // Periodically update most recently seen time
- addrFound.nTime = addr.nTime;
- fUpdated = true;
- }
- }
- }
- // There is a nasty deadlock bug if this is done inside the cs_mapAddresses
- // CRITICAL_BLOCK:
- // Thread 1: begin db transaction (locks inside-db-mutex)
- // then AddAddress (locks cs_mapAddresses)
- // Thread 2: AddAddress (locks cs_mapAddresses)
- // ... then db operation hangs waiting for inside-db-mutex
- if (fUpdated)
- {
- if (pAddrDB)
- pAddrDB->WriteAddress(addrFound);
- else
- CAddrDB().WriteAddress(addrFound);
- }
- return fNew;
-}
-
void AddressCurrentlyConnected(const CService& addr)
{
- CAddress *paddrFound = NULL;
-
- CRITICAL_BLOCK(cs_mapAddresses)
- {
- // Only if it's been published already
- map<vector<unsigned char>, CAddress>::iterator it = mapAddresses.find(addr.GetKey());
- if (it != mapAddresses.end())
- paddrFound = &(*it).second;
- }
-
- if (paddrFound)
- {
- int64 nUpdateInterval = 20 * 60;
- if (paddrFound->nTime < GetAdjustedTime() - nUpdateInterval)
- {
- // Periodically update most recently seen time
- paddrFound->nTime = GetAdjustedTime();
- CAddrDB addrdb;
- addrdb.WriteAddress(*paddrFound);
- }
- }
+ addrman.Connected(addr);
}
@@ -505,13 +428,11 @@ CNode* ConnectNode(CAddress addrConnect, int64 nTimeout)
}
/// debug print
- printf("trying connection %s lastseen=%.1fhrs lasttry=%.1fhrs\n",
+ printf("trying connection %s lastseen=%.1fhrs\n",
addrConnect.ToString().c_str(),
- (double)(addrConnect.nTime - GetAdjustedTime())/3600.0,
- (double)(addrConnect.nLastTry - GetAdjustedTime())/3600.0);
+ (double)(addrConnect.nTime - GetAdjustedTime())/3600.0);
- CRITICAL_BLOCK(cs_mapAddresses)
- mapAddresses[addrConnect.GetKey()].nLastTry = GetAdjustedTime();
+ addrman.Attempt(addrConnect);
// Connect
SOCKET hSocket;
@@ -1125,12 +1046,15 @@ void MapPort(bool /* unused fMapPort */)
-
-static const char *strDNSSeed[] = {
- "bitseed.xf2.org",
- "dnsseed.bluematt.me",
- "seed.bitcoin.sipa.be",
- "dnsseed.bitcoin.dashjr.org",
+// DNS seeds
+// Each pair gives a source name and a seed name.
+// The first name is used as information source for addrman.
+// The second name should resolve to a list of seed addresses.
+static const char *strDNSSeed[][2] = {
+ {"xf2.org", "bitseed.xf2.org"},
+ {"bluematt.me", "dnsseed.bluematt.me"},
+ {"bitcoin.sipa.be", "seed.bitcoin.sipa.be"},
+ {"dashjr.org", "dnsseed.bitcoin.dashjr.org"},
};
void ThreadDNSAddressSeed(void* parg)
@@ -1163,22 +1087,18 @@ void ThreadDNSAddressSeed2(void* parg)
for (int seed_idx = 0; seed_idx < ARRAYLEN(strDNSSeed); seed_idx++) {
vector<CNetAddr> vaddr;
- if (LookupHost(strDNSSeed[seed_idx], vaddr))
+ vector<CAddress> vAdd;
+ if (LookupHost(strDNSSeed[seed_idx][1], vaddr))
{
- CAddrDB addrDB;
- addrDB.TxnBegin();
- BOOST_FOREACH (CNetAddr& ip, vaddr)
+ BOOST_FOREACH(CNetAddr& ip, vaddr)
{
- if (ip.IsRoutable())
- {
- CAddress addr(CService(ip, GetDefaultPort()), NODE_NETWORK);
- addr.nTime = 0;
- AddAddress(addr, 0, &addrDB);
- found++;
- }
+ CAddress addr = CAddress(CService(ip, GetDefaultPort()));
+ addr.nTime = 0;
+ vAdd.push_back(addr);
+ found++;
}
- addrDB.TxnCommit(); // Save addresses (it's ok if this fails)
}
+ addrman.Add(vAdd, CNetAddr(strDNSSeed[seed_idx][0], true));
}
}
@@ -1277,7 +1197,37 @@ unsigned int pnSeed[] =
0xc461d84a, 0xb2dbe247,
};
+void DumpAddresses()
+{
+ CAddrDB adb;
+ adb.WriteAddrman(addrman);
+}
+void ThreadDumpAddress2(void* parg)
+{
+ vnThreadsRunning[THREAD_DUMPADDRESS]++;
+ while (!fShutdown)
+ {
+ DumpAddresses();
+ vnThreadsRunning[THREAD_DUMPADDRESS]--;
+ Sleep(100000);
+ vnThreadsRunning[THREAD_DUMPADDRESS]++;
+ }
+ vnThreadsRunning[THREAD_DUMPADDRESS]--;
+}
+
+void ThreadDumpAddress(void* parg)
+{
+ IMPLEMENT_RANDOMIZE_STACK(ThreadDumpAddress(parg));
+ try
+ {
+ ThreadDumpAddress2(parg);
+ }
+ catch (std::exception& e) {
+ PrintException(&e, "ThreadDumpAddress()");
+ }
+ printf("ThreadDumpAddress exiting\n");
+}
void ThreadOpenConnections(void* parg)
{
@@ -1326,6 +1276,8 @@ void ThreadOpenConnections2(void* parg)
int64 nStart = GetTime();
loop
{
+ int nOutbound = 0;
+
vnThreadsRunning[THREAD_OPENCONNECTIONS]--;
Sleep(500);
vnThreadsRunning[THREAD_OPENCONNECTIONS]++;
@@ -1335,7 +1287,7 @@ void ThreadOpenConnections2(void* parg)
// Limit outbound connections
loop
{
- int nOutbound = 0;
+ nOutbound = 0;
CRITICAL_BLOCK(cs_vNodes)
BOOST_FOREACH(CNode* pnode, vNodes)
if (!pnode->fInbound)
@@ -1353,16 +1305,11 @@ void ThreadOpenConnections2(void* parg)
bool fAddSeeds = false;
- CRITICAL_BLOCK(cs_mapAddresses)
- {
- // Add seed nodes if IRC isn't working
- bool fTOR = (fUseProxy && addrProxy.GetPort() == 9050);
- if (mapAddresses.empty() && (GetTime() - nStart > 60 || fTOR) && !fTestNet)
- fAddSeeds = true;
- }
-
- if (fAddSeeds)
+ // Add seed nodes if IRC isn't working
+ bool fTOR = (fUseProxy && addrProxy.GetPort() == 9050);
+ if (addrman.size()==0 && (GetTime() - nStart > 60 || fTOR) && !fTestNet)
{
+ std::vector<CAddress> vAdd;
for (int i = 0; i < ARRAYLEN(pnSeed); i++)
{
// It'll only connect to one or two seed nodes because once it connects,
@@ -1374,8 +1321,9 @@ void ThreadOpenConnections2(void* parg)
memcpy(&ip, &pnSeed[i], sizeof(ip));
CAddress addr(CService(ip, GetDefaultPort()));
addr.nTime = GetTime()-GetRand(nOneWeek)-nOneWeek;
- AddAddress(addr);
+ vAdd.push_back(addr);
}
+ addrman.Add(vAdd, CNetAddr("127.0.0.1"));
}
//
@@ -1393,59 +1341,28 @@ void ThreadOpenConnections2(void* parg)
int64 nANow = GetAdjustedTime();
- CRITICAL_BLOCK(cs_mapAddresses)
+ int nTries = 0;
+ loop
{
- BOOST_FOREACH(const PAIRTYPE(vector<unsigned char>, CAddress)& item, mapAddresses)
- {
- const CAddress& addr = item.second;
- if (!addr.IsIPv4() || !addr.IsValid() || setConnected.count(addr.GetGroup()))
- continue;
- int64 nSinceLastSeen = nANow - addr.nTime;
- int64 nSinceLastTry = nANow - addr.nLastTry;
-
- // Randomize the order in a deterministic way, putting the standard port first
- int64 nRandomizer = (uint64)(nStart * 4951 + addr.nLastTry * 9567851 + addr.GetHash()) % (2 * 60 * 60);
- if (addr.GetPort() != GetDefaultPort())
- nRandomizer += 2 * 60 * 60;
-
- // Last seen Base retry frequency
- // <1 hour 10 min
- // 1 hour 1 hour
- // 4 hours 2 hours
- // 24 hours 5 hours
- // 48 hours 7 hours
- // 7 days 13 hours
- // 30 days 27 hours
- // 90 days 46 hours
- // 365 days 93 hours
- int64 nDelay = (int64)(3600.0 * sqrt(fabs((double)nSinceLastSeen) / 3600.0) + nRandomizer);
-
- // Fast reconnect for one hour after last seen
- if (nSinceLastSeen < 60 * 60)
- nDelay = 10 * 60;
-
- // Limit retry frequency
- if (nSinceLastTry < nDelay)
- continue;
+ // use an nUnkBias between 10 (no outgoing connections) and 90 (8 outgoing connections)
+ CAddress addr = addrman.Select(10 + min(nOutbound,8)*10);
- // If we have IRC, we'll be notified when they first come online,
- // and again every 24 hours by the refresh broadcast.
- if (nGotIRCAddresses > 0 && vNodes.size() >= 2 && nSinceLastSeen > 24 * 60 * 60)
- continue;
+ // if we selected an invalid address, restart
+ if (!addr.IsIPv4() || !addr.IsValid() || setConnected.count(addr.GetGroup()) || addr == addrLocalHost)
+ break;
- // Only try the old stuff if we don't have enough connections
- if (vNodes.size() >= 8 && nSinceLastSeen > 24 * 60 * 60)
- continue;
+ nTries++;
- // If multiple addresses are ready, prioritize by time since
- // last seen and time since last tried.
- int64 nScore = min(nSinceLastTry, (int64)24 * 60 * 60) - nSinceLastSeen - nRandomizer;
- if (nScore > nBest)
- {
- nBest = nScore;
- addrConnect = addr;
- }
- }
+ // only consider very recently tried nodes after 30 failed attempts
+ if (nANow - addr.nLastTry < 600 && nTries < 30)
+ continue;
+
+ // do not allow non-default ports, unless after 50 invalid addresses selected already
+ if (addr.GetPort() != GetDefaultPort() && nTries < 50)
+ continue;
+
+ addrConnect = addr;
+ break;
}
if (addrConnect.IsValid())
@@ -1811,6 +1728,10 @@ void StartNode(void* parg)
if (!CreateThread(ThreadMessageHandler, NULL))
printf("Error: CreateThread(ThreadMessageHandler) failed\n");
+ // Dump network addresses
+ if (!CreateThread(ThreadDumpAddress, NULL))
+ printf("Error; CreateThread(ThreadDumpAddress) failed\n");
+
// Generate coins in the background
GenerateBitcoins(fGenerateBitcoins, pwalletMain);
}
@@ -1840,10 +1761,11 @@ bool StopNode()
if (fHaveUPnP && vnThreadsRunning[THREAD_UPNP] > 0) printf("ThreadMapPort still running\n");
if (vnThreadsRunning[THREAD_DNSSEED] > 0) printf("ThreadDNSAddressSeed still running\n");
if (vnThreadsRunning[THREAD_ADDEDCONNECTIONS] > 0) printf("ThreadOpenAddedConnections still running\n");
+ if (vnThreadsRunning[THREAD_DUMPADDRESS] > 0) printf("ThreadDumpAddresses still running\n");
while (vnThreadsRunning[THREAD_MESSAGEHANDLER] > 0 || vnThreadsRunning[THREAD_RPCSERVER] > 0)
Sleep(20);
Sleep(50);
-
+ DumpAddresses();
return true;
}
diff --git a/src/net.h b/src/net.h
index 51a816d4d3..6fd494487c 100644
--- a/src/net.h
+++ b/src/net.h
@@ -16,6 +16,7 @@
#include "netbase.h"
#include "protocol.h"
+#include "addrman.h"
class CAddrDB;
class CRequestTracker;
@@ -31,7 +32,6 @@ static const unsigned int PUBLISH_HOPS = 5;
bool RecvLine(SOCKET hSocket, std::string& strLine);
bool GetMyExternalIP(CNetAddr& ipRet);
-bool AddAddress(CAddress addr, int64 nTimePenalty=0, CAddrDB *pAddrDB=NULL);
void AddressCurrentlyConnected(const CService& addr);
CNode* FindNode(const CNetAddr& ip);
CNode* FindNode(const CService& ip);
@@ -79,6 +79,7 @@ enum threadId
THREAD_UPNP,
THREAD_DNSSEED,
THREAD_ADDEDCONNECTIONS,
+ THREAD_DUMPADDRESS,
THREAD_MAX
};
@@ -89,11 +90,10 @@ extern uint64 nLocalServices;
extern CAddress addrLocalHost;
extern uint64 nLocalHostNonce;
extern boost::array<int, THREAD_MAX> vnThreadsRunning;
+extern CAddrMan addrman;
extern std::vector<CNode*> vNodes;
extern CCriticalSection cs_vNodes;
-extern std::map<std::vector<unsigned char>, CAddress> mapAddresses;
-extern CCriticalSection cs_mapAddresses;
extern std::map<CInv, CDataStream> mapRelay;
extern std::deque<std::pair<int64, CInv> > vRelayExpiration;
extern CCriticalSection cs_mapRelay;
diff --git a/src/netbase.cpp b/src/netbase.cpp
index 7799a65972..baf7c412a0 100644
--- a/src/netbase.cpp
+++ b/src/netbase.cpp
@@ -519,15 +519,22 @@ bool CNetAddr::GetIn6Addr(struct in6_addr* pipv6Addr) const
std::vector<unsigned char> CNetAddr::GetGroup() const
{
std::vector<unsigned char> vchRet;
- int nClass = 0; // 0=IPv6, 1=IPv4, 255=unroutable
+ int nClass = 0; // 0=IPv6, 1=IPv4, 254=local, 255=unroutable
int nStartByte = 0;
int nBits = 16;
- // for unroutable addresses, each address is considered different
+ // all local addresses belong to the same group
+ if (IsLocal())
+ {
+ nClass = 254;
+ nBits = 0;
+ }
+
+ // all unroutable addresses belong to the same group
if (!IsRoutable())
{
nClass = 255;
- nBits = 128;
+ nBits = 0;
}
// for IPv4 addresses, '1' + the 16 higher-order bits of the IP
// includes mapped IPv4, SIIT translated IPv4, and the well-known prefix
diff --git a/src/protocol.h b/src/protocol.h
index b70dd71b82..613c47f042 100644
--- a/src/protocol.h
+++ b/src/protocol.h
@@ -94,7 +94,7 @@ class CAddress : public CService
unsigned int nTime;
// memory only
- unsigned int nLastTry;
+ int64 nLastTry;
};
class CInv
diff --git a/src/uint256.h b/src/uint256.h
index caf6fa118b..783e7069e9 100644
--- a/src/uint256.h
+++ b/src/uint256.h
@@ -348,6 +348,10 @@ public:
return sizeof(pn);
}
+ uint64 Get64(int n=0) const
+ {
+ return pn[2*n] | (uint64)pn[2*n+1] << 32;
+ }
unsigned int GetSerializeSize(int nType=0, int nVersion=PROTOCOL_VERSION) const
{
generated by cgit v1.2.3 (git 2.26.2) at 2024-11-10 15:34:35 +0000