unix build merged in, bitmap resources from xpm instead of rc, better addr relay, better selection of addrs by time last seen for faster connect

git-svn-id: https://bitcoin.svn.sourceforge.net/svnroot/bitcoin/trunk@32 1a98c847-1fd6-4fd8-948a-caf3550aa51b

1 files changed, 89 insertions, 88 deletions

diff --git a/net.cpp b/net.cpp
index 8ccf48b819..c14061e7d3 100644
--- a/net.cpp
+++ b/net.cpp
@@ -3,7 +3,6 @@
 // file license.txt or http://www.opensource.org/licenses/mit-license.php.

 

 #include "headers.h"

-#include <winsock2.h>

 

 void ThreadMessageHandler2(void* parg);

 void ThreadSocketHandler2(void* parg);

@@ -201,12 +200,14 @@ bool GetMyExternalIP(unsigned int& ipRet)
 

 

 

-bool AddAddress(CAddrDB& addrdb, const CAddress& addr)

+bool AddAddress(CAddrDB& addrdb, CAddress addr, bool fCurrentlyOnline)

 {

     if (!addr.IsRoutable())

         return false;

     if (addr.ip == addrLocalHost.ip)

         return false;

+    if (fCurrentlyOnline)

+        addr.nTime = GetAdjustedTime();

     CRITICAL_BLOCK(cs_mapAddresses)

     {

         map<vector<unsigned char>, CAddress>::iterator it = mapAddresses.find(addr.GetKey());

@@ -219,24 +220,47 @@ bool AddAddress(CAddrDB& addrdb, const CAddress& addr)
         }

         else

         {

+            bool fUpdated = false;

             CAddress& addrFound = (*it).second;

             if ((addrFound.nServices | addr.nServices) != addrFound.nServices)

             {

                 // Services have been added

                 addrFound.nServices |= addr.nServices;

-                addrdb.WriteAddress(addrFound);

-                return true;

+                fUpdated = true;

+            }

+            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;

             }

-            else if (addrFound.nTime < GetAdjustedTime() - 24 * 60 * 60)

+            if (fUpdated)

+                addrdb.WriteAddress(addrFound);

+        }

+    }

+    return false;

+}

+

+void AddressCurrentlyConnected(const CAddress& addr)

+{

+    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())

+        {

+            CAddress& addrFound = (*it).second;

+            int64 nUpdateInterval = 60 * 60;

+            if (addrFound.nTime < GetAdjustedTime() - nUpdateInterval)

             {

                 // Periodically update most recently seen time

                 addrFound.nTime = GetAdjustedTime();

+                CAddrDB addrdb;

                 addrdb.WriteAddress(addrFound);

-                return false;

             }

         }

     }

-    return false;

 }

 

 

@@ -398,9 +422,14 @@ CNode* ConnectNode(CAddress addrConnect, int64 nTimeout)
         printf("connected %s\n", addrConnect.ToStringLog().c_str());

 

         // Set to nonblocking

-        u_long nOne = 1;

+#ifdef __WXMSW__

+		u_long nOne = 1;

         if (ioctlsocket(hSocket, FIONBIO, &nOne) == SOCKET_ERROR)

             printf("ConnectSocket() : ioctlsocket nonblocking setting failed, error %d\n", WSAGetLastError());

+#else

+        if (fcntl(hSocket, F_SETFL, O_NONBLOCK) == SOCKET_ERROR)

+            printf("ConnectSocket() : fcntl nonblocking setting failed, error %d\n", errno);

+#endif

 

         // Add node

         CNode* pnode = new CNode(hSocket, addrConnect, false);

@@ -418,7 +447,7 @@ CNode* ConnectNode(CAddress addrConnect, int64 nTimeout)
     else

     {

         CRITICAL_BLOCK(cs_mapAddresses)

-            mapAddresses[addrConnect.GetKey()].nLastFailed = GetTime();

+            mapAddresses[addrConnect.GetKey()].nLastFailed = GetAdjustedTime();

         return NULL;

     }

 }

@@ -432,7 +461,7 @@ void CNode::DoDisconnect()
     // If outbound and never got version message, mark address as failed

     if (!fInbound && !fSuccessfullyConnected)

         CRITICAL_BLOCK(cs_mapAddresses)

-            mapAddresses[addr.GetKey()].nLastFailed = GetTime();

+            mapAddresses[addr.GetKey()].nLastFailed = GetAdjustedTime();

 

     // All of a nodes broadcasts and subscriptions are automatically torn down

     // when it goes down, so a node has to stay up to keep its broadcast going.

@@ -549,8 +578,8 @@ void ThreadSocketHandler2(void* parg)
         timeout.tv_sec  = 0;

         timeout.tv_usec = 50000; // frequency to poll pnode->vSend

 

-        struct fd_set fdsetRecv;

-        struct fd_set fdsetSend;

+        fd_set fdsetRecv;

+        fd_set fdsetSend;

         FD_ZERO(&fdsetRecv);

         FD_ZERO(&fdsetSend);

         SOCKET hSocketMax = 0;

@@ -599,7 +628,11 @@ void ThreadSocketHandler2(void* parg)
         if (FD_ISSET(hListenSocket, &fdsetRecv))

         {

             struct sockaddr_in sockaddr;

+#ifdef __WXMSW__

             int len = sizeof(sockaddr);

+#else

+            socklen_t len = sizeof(sockaddr);

+#endif

             SOCKET hSocket = accept(hListenSocket, (struct sockaddr*)&sockaddr, &len);

             CAddress addr(sockaddr);

             if (hSocket == INVALID_SOCKET)

@@ -765,14 +798,12 @@ void ThreadOpenConnections2(void* parg)
     }

 

     // Initiate network connections

-    int nTry = 0;

-    bool fIRCOnly = false;

-    const int nMaxConnections = 15;

     loop

     {

         // Wait

         vnThreadsRunning[1]--;

         Sleep(500);

+        const int nMaxConnections = 15;

         while (vNodes.size() >= nMaxConnections || vNodes.size() >= mapAddresses.size())

         {

             CheckForShutdown(1);

@@ -781,93 +812,55 @@ void ThreadOpenConnections2(void* parg)
         vnThreadsRunning[1]++;

         CheckForShutdown(1);

 

-

         //

-        // The IP selection process is designed to limit vulnerability to address flooding.

-        // Any class C (a.b.c.?) has an equal chance of being chosen, then an IP is

-        // chosen within the class C.  An attacker may be able to allocate many IPs, but

-        // they would normally be concentrated in blocks of class C's.  They can hog the

-        // attention within their class C, but not the whole IP address space overall.

-        // A lone node in a class C will get as much attention as someone holding all 255

-        // IPs in another class C.

+        // Choose an address to connect to based on most recently seen

         //

+        CAddress addrConnect;

+        int64 nBestTime = 0;

+        int64 nDelay = ((60 * 60) << vNodes.size());

+        if (vNodes.size() >= 3)

+            nDelay *= 4;

+        if (nGotIRCAddresses > 0)

+            nDelay *= 100;

+

+        // Do this here so we don't have to critsect vNodes inside mapAddresses critsect

+        set<unsigned int> setConnected;

+        CRITICAL_BLOCK(cs_vNodes)

+            foreach(CNode* pnode, vNodes)

+                setConnected.insert(pnode->addr.ip);

 

-        // Every other try is with IRC addresses only

-        fIRCOnly = !fIRCOnly;

-        if (mapIRCAddresses.empty())

-            fIRCOnly = false;

-        else if (nTry++ < 30 && vNodes.size() < nMaxConnections/2)

-            fIRCOnly = true;

-

-        // Make a list of unique class C's

-        unsigned char pchIPCMask[4] = { 0xff, 0xff, 0xff, 0x00 };

-        unsigned int nIPCMask = *(unsigned int*)pchIPCMask;

-        vector<unsigned int> vIPC;

-        CRITICAL_BLOCK(cs_mapIRCAddresses)

         CRITICAL_BLOCK(cs_mapAddresses)

         {

-            vIPC.reserve(mapAddresses.size());

-            unsigned int nPrev = 0;

             foreach(const PAIRTYPE(vector<unsigned char>, CAddress)& item, mapAddresses)

             {

                 const CAddress& addr = item.second;

-                if (!addr.IsIPv4())

-                    continue;

-                if (fIRCOnly && !mapIRCAddresses.count(item.first))

+                if (!addr.IsIPv4() || !addr.IsValid() || setConnected.count(addr.ip))

                     continue;

 

-                // Taking advantage of mapAddresses being in sorted order,

-                // with IPs of the same class C grouped together.

-                unsigned int ipC = addr.ip & nIPCMask;

-                if (ipC != nPrev)

-                    vIPC.push_back(nPrev = ipC);

-            }

-        }

-        if (vIPC.empty())

-            continue;

-

-        // Choose a random class C

-        unsigned int ipC = vIPC[GetRand(vIPC.size())];

+                // Limit retry frequency

+                if (GetAdjustedTime() < addr.nLastFailed + nDelay)

+                    continue;

 

-        // Organize all addresses in the class C by IP

-        map<unsigned int, vector<CAddress> > mapIP;

-        CRITICAL_BLOCK(cs_mapIRCAddresses)

-        CRITICAL_BLOCK(cs_mapAddresses)

-        {

-            int64 nDelay = ((30 * 60) << vNodes.size());

-            if (!fIRCOnly)

-            {

-                nDelay *= 2;

-                if (vNodes.size() >= 3)

-                    nDelay *= 4;

-                if (!mapIRCAddresses.empty())

-                    nDelay *= 100;

-            }

+                // Try again only after all addresses had a first attempt

+                int64 nTime = addr.nTime;

+                if (addr.nLastFailed > addr.nTime)

+                    nTime -= 365 * 24 * 60 * 60;

 

-            for (map<vector<unsigned char>, CAddress>::iterator mi = mapAddresses.lower_bound(CAddress(ipC, 0).GetKey());

-                 mi != mapAddresses.upper_bound(CAddress(ipC | ~nIPCMask, 0xffff).GetKey());

-                 ++mi)

-            {

-                const CAddress& addr = (*mi).second;

-                if (fIRCOnly && !mapIRCAddresses.count((*mi).first))

-                    continue;

+                // Randomize the order a little, putting the standard port first

+                nTime += GetRand(1 * 60 * 60);

+                if (addr.port != DEFAULT_PORT)

+                    nTime -= 1 * 60 * 60;

 

-                int64 nRandomizer = (addr.nLastFailed * addr.ip * 7777U) % 20000;

-                if (GetTime() - addr.nLastFailed > nDelay * nRandomizer / 10000)

-                    mapIP[addr.ip].push_back(addr);

+                if (nTime > nBestTime)

+                {

+                    nBestTime = nTime;

+                    addrConnect = addr;

+                }

             }

         }

-        if (mapIP.empty())

-            continue;

-

-        // Choose a random IP in the class C

-        map<unsigned int, vector<CAddress> >::iterator mi = mapIP.begin();

-        advance(mi, GetRand(mapIP.size()));

 

-        // Once we've chosen an IP, we'll try every given port before moving on

-        foreach(const CAddress& addrConnect, (*mi).second)

-            if (OpenNetworkConnection(addrConnect))

-                break;

+        if (addrConnect.IsValid())

+            OpenNetworkConnection(addrConnect);

     }

 }

 

@@ -989,6 +982,7 @@ bool StartNode(string& strError)
         pnodeLocalHost = new CNode(INVALID_SOCKET, CAddress("127.0.0.1", nLocalServices));

     strError = "";

 

+#ifdef __WXMSW__

     // Sockets startup

     WSADATA wsadata;

     int ret = WSAStartup(MAKEWORD(2,2), &wsadata);

@@ -998,6 +992,7 @@ bool StartNode(string& strError)
         printf("%s\n", strError.c_str());

         return false;

     }

+#endif

 

     // Get local host ip

     char pszHostName[255];

@@ -1029,10 +1024,14 @@ bool StartNode(string& strError)
     }

 

     // Set to nonblocking, incoming connections will also inherit this

+#ifdef __WXMSW__

     u_long nOne = 1;

     if (ioctlsocket(hListenSocket, FIONBIO, &nOne) == SOCKET_ERROR)

+#else

+    if (fcntl(hListenSocket, F_SETFL, O_NONBLOCK) == SOCKET_ERROR)

+#endif

     {

-        strError = strprintf("Error: Couldn't set properties on socket for incoming connections (ioctlsocket returned error %d)", WSAGetLastError());

+        strError = strprintf("Error: Couldn't set properties on socket for incoming connections (error %d)", WSAGetLastError());

         printf("%s\n", strError.c_str());

         return false;

     }

@@ -1041,7 +1040,7 @@ bool StartNode(string& strError)
     // IP address, and port for the socket that is being bound

     int nRetryLimit = 15;

     struct sockaddr_in sockaddr = addrLocalHost.GetSockAddr();

-    if (bind(hListenSocket, (struct sockaddr*)&sockaddr, sizeof(sockaddr)) == SOCKET_ERROR)

+    if (::bind(hListenSocket, (struct sockaddr*)&sockaddr, sizeof(sockaddr)) == SOCKET_ERROR)

     {

         int nErr = WSAGetLastError();

         if (nErr == WSAEADDRINUSE)

@@ -1131,7 +1130,9 @@ bool StopNode()
     Sleep(50);

 

     // Sockets shutdown

+#ifdef __WXMSW__

     WSACleanup();

+#endif

     return true;

 }