Merge pull request #948 from sipa/unstuck

[novacoin.git] / src / main.cpp

diff --git a/src/main.cpp b/src/main.cpp
index 1b56cea..491044e 100644 (file)
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1382,6 +1382,9 @@ bool static Reorganize(CTxDB& txdb, CBlockIndex* pindexNew)
         vConnect.push_back(pindex);
     reverse(vConnect.begin(), vConnect.end());
 
+    printf("REORGANIZE: Disconnect %i blocks; %s..%s\n", vDisconnect.size(), pfork->GetBlockHash().ToString().substr(0,20).c_str(), pindexBest->GetBlockHash().ToString().substr(0,20).c_str());
+    printf("REORGANIZE: Connect %i blocks; %s..%s\n", vConnect.size(), pfork->GetBlockHash().ToString().substr(0,20).c_str(), pindexNew->GetBlockHash().ToString().substr(0,20).c_str());
+
     // Disconnect shorter branch
     vector<CTransaction> vResurrect;
     BOOST_FOREACH(CBlockIndex* pindex, vDisconnect)
@@ -1390,7 +1393,7 @@ bool static Reorganize(CTxDB& txdb, CBlockIndex* pindexNew)
         if (!block.ReadFromDisk(pindex))
             return error("Reorganize() : ReadFromDisk for disconnect failed");
         if (!block.DisconnectBlock(txdb, pindex))
-            return error("Reorganize() : DisconnectBlock failed");
+            return error("Reorganize() : DisconnectBlock %s failed", pindex->GetBlockHash().ToString().substr(0,20).c_str());
 
         // Queue memory transactions to resurrect
         BOOST_FOREACH(const CTransaction& tx, block.vtx)
@@ -1410,7 +1413,7 @@ bool static Reorganize(CTxDB& txdb, CBlockIndex* pindexNew)
         {
             // Invalid block
             txdb.TxnAbort();
-            return error("Reorganize() : ConnectBlock failed");
+            return error("Reorganize() : ConnectBlock %s failed", pindex->GetBlockHash().ToString().substr(0,20).c_str());
         }
 
         // Queue memory transactions to delete
@@ -1442,8 +1445,7 @@ bool static Reorganize(CTxDB& txdb, CBlockIndex* pindexNew)
     BOOST_FOREACH(CTransaction& tx, vDelete)
         tx.RemoveFromMemoryPool();
 
-    printf("REORGANIZE: Disconnected %i blocks; %s..%s\n", vDisconnect.size(), pfork->GetBlockHash().ToString().substr(0,20).c_str(), pindexBest->GetBlockHash().ToString().substr(0,20).c_str());
-    printf("REORGANIZE: Connected %i blocks; %s..%s\n", vConnect.size(), pfork->GetBlockHash().ToString().substr(0,20).c_str(), pindexNew->GetBlockHash().ToString().substr(0,20).c_str());
+    printf("REORGANIZE: done\n");
 
     return true;
 }
@@ -1457,10 +1459,9 @@ runCommand(std::string strCommand)
         printf("runCommand error: system(%s) returned %d\n", strCommand.c_str(), nErr);
 }
 
+// Called from inside SetBestChain: attaches a block to the new best chain being built
 bool CBlock::SetBestChainInner(CTxDB& txdb, CBlockIndex *pindexNew)
 {
-    assert(pindexNew->pprev == pindexBest);
-
     uint256 hash = GetHash();
 
     // Adding to current best branch
@@ -1707,10 +1708,11 @@ bool CBlock::AcceptBlock()
         return error("AcceptBlock() : AddToBlockIndex failed");
 
     // Relay inventory, but don't relay old inventory during initial block download
+    int nBlockEstimate = Checkpoints::GetTotalBlocksEstimate();
     if (hashBestChain == hash)
         CRITICAL_BLOCK(cs_vNodes)
             BOOST_FOREACH(CNode* pnode, vNodes)
-                if (nBestHeight > (pnode->nStartingHeight != -1 ? pnode->nStartingHeight - 2000 : 140700))
+                if (nBestHeight > (pnode->nStartingHeight != -1 ? pnode->nStartingHeight - 2000 : nBlockEstimate))
                     pnode->PushInventory(CInv(MSG_BLOCK, hash));
 
     return true;
@@ -2357,8 +2359,10 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv)
         }
 
         CTxDB txdb("r");
-        BOOST_FOREACH(const CInv& inv, vInv)
+        for (int nInv = 0; nInv < vInv.size(); nInv++)
         {
+            const CInv &inv = vInv[nInv];
+
             if (fShutdown)
                 return true;
             pfrom->AddInventoryKnown(inv);
@@ -2367,9 +2371,12 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv)
             if (fDebug)
                 printf("  got inventory: %s  %s\n", inv.ToString().c_str(), fAlreadyHave ? "have" : "new");
 
-            if (!fAlreadyHave)
+            // Always request the last block in an inv bundle (even if we already have it), as it is the
+            // trigger for the other side to send further invs. If we are stuck on a (very long) side chain,
+            // this is necessary to connect earlier received orphan blocks to the chain again.
+            if (!fAlreadyHave || (inv.type == MSG_BLOCK && nInv==vInv.size()-1))
                 pfrom->AskFor(inv);
-            else if (inv.type == MSG_BLOCK && mapOrphanBlocks.count(inv.hash))
+            if (inv.type == MSG_BLOCK && mapOrphanBlocks.count(inv.hash))
                 pfrom->PushGetBlocks(pindexBest, GetOrphanRoot(mapOrphanBlocks[inv.hash]));
 
             // Track requests for our stuff