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kevacoin/src/net.cpp

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// Copyright (c) 2009-2010 Satoshi Nakamoto
// Distributed under the MIT/X11 software license, see the accompanying
// file license.txt or http://www.opensource.org/licenses/mit-license.php.
#include "headers.h"
#include "irc.h"
#include "db.h"
#include "net.h"
#include "init.h"
#include "strlcpy.h"
#ifdef __WXMSW__
#include <string.h>
// This file can be downloaded as a part of the Windows Platform SDK
// and is required for Bitcoin binaries to work properly on versions
// of Windows before XP. If you are doing builds of Bitcoin for
// public release, you should uncomment this line.
//#include <WSPiApi.h>
#endif
#ifdef USE_UPNP
#include <miniupnpc/miniwget.h>
#include <miniupnpc/miniupnpc.h>
#include <miniupnpc/upnpcommands.h>
#include <miniupnpc/upnperrors.h>
#endif
using namespace std;
using namespace boost;
static const int MAX_OUTBOUND_CONNECTIONS = 8;
void ThreadMessageHandler2(void* parg);
void ThreadSocketHandler2(void* parg);
void ThreadOpenConnections2(void* parg);
#ifdef USE_UPNP
void ThreadMapPort2(void* parg);
#endif
bool OpenNetworkConnection(const CAddress& addrConnect);
//
// Global state variables
//
bool fClient = false;
bool fAllowDNS = false;
uint64 nLocalServices = (fClient ? 0 : NODE_NETWORK);
CAddress addrLocalHost("0.0.0.0", 0, false, nLocalServices);
CNode* pnodeLocalHost = NULL;
uint64 nLocalHostNonce = 0;
array<int, 10> vnThreadsRunning;
SOCKET hListenSocket = INVALID_SOCKET;
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;
map<CInv, int64> mapAlreadyAskedFor;
// Settings
int fUseProxy = false;
int nConnectTimeout = 5000;
CAddress addrProxy("127.0.0.1",9050);
unsigned short GetListenPort()
{
return (unsigned short)(GetArg("-port", GetDefaultPort()));
}
void CNode::PushGetBlocks(CBlockIndex* pindexBegin, uint256 hashEnd)
{
// Filter out duplicate requests
if (pindexBegin == pindexLastGetBlocksBegin && hashEnd == hashLastGetBlocksEnd)
return;
pindexLastGetBlocksBegin = pindexBegin;
hashLastGetBlocksEnd = hashEnd;
PushMessage("getblocks", CBlockLocator(pindexBegin), hashEnd);
}
bool ConnectSocket(const CAddress& addrConnect, SOCKET& hSocketRet, int nTimeout)
{
hSocketRet = INVALID_SOCKET;
SOCKET hSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (hSocket == INVALID_SOCKET)
return false;
#ifdef BSD
int set = 1;
setsockopt(hSocket, SOL_SOCKET, SO_NOSIGPIPE, (void*)&set, sizeof(int));
#endif
bool fProxy = (fUseProxy && addrConnect.IsRoutable());
struct sockaddr_in sockaddr = (fProxy ? addrProxy.GetSockAddr() : addrConnect.GetSockAddr());
#ifdef __WXMSW__
u_long fNonblock = 1;
if (ioctlsocket(hSocket, FIONBIO, &fNonblock) == SOCKET_ERROR)
#else
int fFlags = fcntl(hSocket, F_GETFL, 0);
if (fcntl(hSocket, F_SETFL, fFlags | O_NONBLOCK) == -1)
#endif
{
closesocket(hSocket);
return false;
}
if (connect(hSocket, (struct sockaddr*)&sockaddr, sizeof(sockaddr)) == SOCKET_ERROR)
{
// WSAEINVAL is here because some legacy version of winsock uses it
if (WSAGetLastError() == WSAEINPROGRESS || WSAGetLastError() == WSAEWOULDBLOCK || WSAGetLastError() == WSAEINVAL)
{
struct timeval timeout;
timeout.tv_sec = nTimeout / 1000;
timeout.tv_usec = (nTimeout % 1000) * 1000;
fd_set fdset;
FD_ZERO(&fdset);
FD_SET(hSocket, &fdset);
int nRet = select(hSocket + 1, NULL, &fdset, NULL, &timeout);
if (nRet == 0)
{
printf("connection timeout\n");
closesocket(hSocket);
return false;
}
if (nRet == SOCKET_ERROR)
{
printf("select() for connection failed: %i\n",WSAGetLastError());
closesocket(hSocket);
return false;
}
socklen_t nRetSize = sizeof(nRet);
#ifdef __WXMSW__
if (getsockopt(hSocket, SOL_SOCKET, SO_ERROR, (char*)(&nRet), &nRetSize) == SOCKET_ERROR)
#else
if (getsockopt(hSocket, SOL_SOCKET, SO_ERROR, &nRet, &nRetSize) == SOCKET_ERROR)
#endif
{
printf("getsockopt() for connection failed: %i\n",WSAGetLastError());
closesocket(hSocket);
return false;
}
if (nRet != 0)
{
printf("connect() failed after select(): %s\n",strerror(nRet));
closesocket(hSocket);
return false;
}
}
#ifdef __WXMSW__
else if (WSAGetLastError() != WSAEISCONN)
#else
else
#endif
{
printf("connect() failed: %i\n",WSAGetLastError());
closesocket(hSocket);
return false;
}
}
/*
this isn't even strictly necessary
CNode::ConnectNode immediately turns the socket back to non-blocking
but we'll turn it back to blocking just in case
*/
#ifdef __WXMSW__
fNonblock = 0;
if (ioctlsocket(hSocket, FIONBIO, &fNonblock) == SOCKET_ERROR)
#else
fFlags = fcntl(hSocket, F_GETFL, 0);
if (fcntl(hSocket, F_SETFL, fFlags & !O_NONBLOCK) == SOCKET_ERROR)
#endif
{
closesocket(hSocket);
return false;
}
if (fProxy)
{
printf("proxy connecting %s\n", addrConnect.ToString().c_str());
char pszSocks4IP[] = "\4\1\0\0\0\0\0\0user";
memcpy(pszSocks4IP + 2, &addrConnect.port, 2);
memcpy(pszSocks4IP + 4, &addrConnect.ip, 4);
char* pszSocks4 = pszSocks4IP;
int nSize = sizeof(pszSocks4IP);
int ret = send(hSocket, pszSocks4, nSize, MSG_NOSIGNAL);
if (ret != nSize)
{
closesocket(hSocket);
return error("Error sending to proxy");
}
char pchRet[8];
if (recv(hSocket, pchRet, 8, 0) != 8)
{
closesocket(hSocket);
return error("Error reading proxy response");
}
if (pchRet[1] != 0x5a)
{
closesocket(hSocket);
if (pchRet[1] != 0x5b)
printf("ERROR: Proxy returned error %d\n", pchRet[1]);
return false;
}
printf("proxy connected %s\n", addrConnect.ToString().c_str());
}
hSocketRet = hSocket;
return true;
}
// portDefault is in host order
bool Lookup(const char *pszName, vector<CAddress>& vaddr, int nServices, int nMaxSolutions, bool fAllowLookup, int portDefault, bool fAllowPort)
{
vaddr.clear();
if (pszName[0] == 0)
return false;
int port = portDefault;
char psz[256];
char *pszHost = psz;
strlcpy(psz, pszName, sizeof(psz));
if (fAllowPort)
{
char* pszColon = strrchr(psz+1,':');
char *pszPortEnd = NULL;
int portParsed = pszColon ? strtoul(pszColon+1, &pszPortEnd, 10) : 0;
if (pszColon && pszPortEnd && pszPortEnd[0] == 0)
{
if (psz[0] == '[' && pszColon[-1] == ']')
{
// Future: enable IPv6 colon-notation inside []
pszHost = psz+1;
pszColon[-1] = 0;
}
else
pszColon[0] = 0;
port = portParsed;
if (port < 0 || port > USHRT_MAX)
port = USHRT_MAX;
}
}
unsigned int addrIP = inet_addr(pszHost);
if (addrIP != INADDR_NONE)
{
// valid IP address passed
vaddr.push_back(CAddress(addrIP, port, nServices));
return true;
}
if (!fAllowLookup)
return false;
struct hostent* phostent = gethostbyname(pszHost);
if (!phostent)
return false;
if (phostent->h_addrtype != AF_INET)
return false;
char** ppAddr = phostent->h_addr_list;
while (*ppAddr != NULL && vaddr.size() != nMaxSolutions)
{
CAddress addr(((struct in_addr*)ppAddr[0])->s_addr, port, nServices);
if (addr.IsValid())
vaddr.push_back(addr);
ppAddr++;
}
return (vaddr.size() > 0);
}
// portDefault is in host order
bool Lookup(const char *pszName, CAddress& addr, int nServices, bool fAllowLookup, int portDefault, bool fAllowPort)
{
vector<CAddress> vaddr;
bool fRet = Lookup(pszName, vaddr, nServices, 1, fAllowLookup, portDefault, fAllowPort);
if (fRet)
addr = vaddr[0];
return fRet;
}
bool GetMyExternalIP2(const CAddress& addrConnect, const char* pszGet, const char* pszKeyword, unsigned int& ipRet)
{
SOCKET hSocket;
if (!ConnectSocket(addrConnect, hSocket))
return error("GetMyExternalIP() : connection to %s failed", addrConnect.ToString().c_str());
send(hSocket, pszGet, strlen(pszGet), MSG_NOSIGNAL);
string strLine;
while (RecvLine(hSocket, strLine))
{
if (strLine.empty()) // HTTP response is separated from headers by blank line
{
loop
{
if (!RecvLine(hSocket, strLine))
{
closesocket(hSocket);
return false;
}
if (pszKeyword == NULL)
break;
if (strLine.find(pszKeyword) != -1)
{
strLine = strLine.substr(strLine.find(pszKeyword) + strlen(pszKeyword));
break;
}
}
closesocket(hSocket);
if (strLine.find("<") != -1)
strLine = strLine.substr(0, strLine.find("<"));
strLine = strLine.substr(strspn(strLine.c_str(), " \t\n\r"));
while (strLine.size() > 0 && isspace(strLine[strLine.size()-1]))
strLine.resize(strLine.size()-1);
CAddress addr(strLine,0,true);
printf("GetMyExternalIP() received [%s] %s\n", strLine.c_str(), addr.ToString().c_str());
if (addr.ip == 0 || addr.ip == INADDR_NONE || !addr.IsRoutable())
return false;
ipRet = addr.ip;
return true;
}
}
closesocket(hSocket);
return error("GetMyExternalIP() : connection closed");
}
// We now get our external IP from the IRC server first and only use this as a backup
bool GetMyExternalIP(unsigned int& ipRet)
{
CAddress addrConnect;
const char* pszGet;
const char* pszKeyword;
if (fUseProxy)
return false;
for (int nLookup = 0; nLookup <= 1; nLookup++)
for (int nHost = 1; nHost <= 2; nHost++)
{
// We should be phasing out our use of sites like these. If we need
// replacements, we should ask for volunteers to put this simple
// php file on their webserver that prints the client IP:
// <?php echo $_SERVER["REMOTE_ADDR"]; ?>
if (nHost == 1)
{
addrConnect = CAddress("91.198.22.70",80); // checkip.dyndns.org
if (nLookup == 1)
{
CAddress addrIP("checkip.dyndns.org", 80, true);
if (addrIP.IsValid())
addrConnect = addrIP;
}
pszGet = "GET / HTTP/1.1\r\n"
"Host: checkip.dyndns.org\r\n"
"User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1)\r\n"
"Connection: close\r\n"
"\r\n";
pszKeyword = "Address:";
}
else if (nHost == 2)
{
addrConnect = CAddress("74.208.43.192", 80); // www.showmyip.com
if (nLookup == 1)
{
CAddress addrIP("www.showmyip.com", 80, true);
if (addrIP.IsValid())
addrConnect = addrIP;
}
pszGet = "GET /simple/ HTTP/1.1\r\n"
"Host: www.showmyip.com\r\n"
"User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1)\r\n"
"Connection: close\r\n"
"\r\n";
pszKeyword = NULL; // Returns just IP address
}
if (GetMyExternalIP2(addrConnect, pszGet, pszKeyword, ipRet))
return true;
}
return false;
}
void ThreadGetMyExternalIP(void* parg)
{
// Wait for IRC to get it first
if (!GetBoolArg("-noirc"))
{
for (int i = 0; i < 2 * 60; i++)
{
Sleep(1000);
if (fGotExternalIP || fShutdown)
return;
}
}
// Fallback in case IRC fails to get it
if (GetMyExternalIP(addrLocalHost.ip))
{
printf("GetMyExternalIP() returned %s\n", addrLocalHost.ToStringIP().c_str());
if (addrLocalHost.IsRoutable())
{
// If we already connected to a few before we had our IP, go back and addr them.
// setAddrKnown automatically filters any duplicate sends.
CAddress addr(addrLocalHost);
addr.nTime = GetAdjustedTime();
CRITICAL_BLOCK(cs_vNodes)
BOOST_FOREACH(CNode* pnode, vNodes)
pnode->PushAddress(addr);
}
}
}
bool AddAddress(CAddress addr, int64 nTimePenalty, CAddrDB *pAddrDB)
{
if (!addr.IsRoutable())
return false;
if (addr.ip == addrLocalHost.ip)
return false;
addr.nTime = max((int64)0, (int64)addr.nTime - nTimePenalty);
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));
if (pAddrDB)
pAddrDB->WriteAddress(addr);
else
CAddrDB().WriteAddress(addr);
return true;
}
else
{
bool fUpdated = false;
CAddress& 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;
}
if (fUpdated)
{
if (pAddrDB)
pAddrDB->WriteAddress(addrFound);
else
CAddrDB().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 = 20 * 60;
if (addrFound.nTime < GetAdjustedTime() - nUpdateInterval)
{
// Periodically update most recently seen time
addrFound.nTime = GetAdjustedTime();
CAddrDB addrdb;
addrdb.WriteAddress(addrFound);
}
}
}
}
void AbandonRequests(void (*fn)(void*, CDataStream&), void* param1)
{
// If the dialog might get closed before the reply comes back,
// call this in the destructor so it doesn't get called after it's deleted.
CRITICAL_BLOCK(cs_vNodes)
{
BOOST_FOREACH(CNode* pnode, vNodes)
{
CRITICAL_BLOCK(pnode->cs_mapRequests)
{
for (map<uint256, CRequestTracker>::iterator mi = pnode->mapRequests.begin(); mi != pnode->mapRequests.end();)
{
CRequestTracker& tracker = (*mi).second;
if (tracker.fn == fn && tracker.param1 == param1)
pnode->mapRequests.erase(mi++);
else
mi++;
}
}
}
}
}
//
// Subscription methods for the broadcast and subscription system.
// Channel numbers are message numbers, i.e. MSG_TABLE and MSG_PRODUCT.
//
// The subscription system uses a meet-in-the-middle strategy.
// With 100,000 nodes, if senders broadcast to 1000 random nodes and receivers
// subscribe to 1000 random nodes, 99.995% (1 - 0.99^1000) of messages will get through.
//
bool AnySubscribed(unsigned int nChannel)
{
if (pnodeLocalHost->IsSubscribed(nChannel))
return true;
CRITICAL_BLOCK(cs_vNodes)
BOOST_FOREACH(CNode* pnode, vNodes)
if (pnode->IsSubscribed(nChannel))
return true;
return false;
}
bool CNode::IsSubscribed(unsigned int nChannel)
{
if (nChannel >= vfSubscribe.size())
return false;
return vfSubscribe[nChannel];
}
void CNode::Subscribe(unsigned int nChannel, unsigned int nHops)
{
if (nChannel >= vfSubscribe.size())
return;
if (!AnySubscribed(nChannel))
{
// Relay subscribe
CRITICAL_BLOCK(cs_vNodes)
BOOST_FOREACH(CNode* pnode, vNodes)
if (pnode != this)
pnode->PushMessage("subscribe", nChannel, nHops);
}
vfSubscribe[nChannel] = true;
}
void CNode::CancelSubscribe(unsigned int nChannel)
{
if (nChannel >= vfSubscribe.size())
return;
// Prevent from relaying cancel if wasn't subscribed
if (!vfSubscribe[nChannel])
return;
vfSubscribe[nChannel] = false;
if (!AnySubscribed(nChannel))
{
// Relay subscription cancel
CRITICAL_BLOCK(cs_vNodes)
BOOST_FOREACH(CNode* pnode, vNodes)
if (pnode != this)
pnode->PushMessage("sub-cancel", nChannel);
}
}
CNode* FindNode(unsigned int ip)
{
CRITICAL_BLOCK(cs_vNodes)
{
BOOST_FOREACH(CNode* pnode, vNodes)
if (pnode->addr.ip == ip)
return (pnode);
}
return NULL;
}
CNode* FindNode(CAddress addr)
{
CRITICAL_BLOCK(cs_vNodes)
{
BOOST_FOREACH(CNode* pnode, vNodes)
if (pnode->addr == addr)
return (pnode);
}
return NULL;
}
CNode* ConnectNode(CAddress addrConnect, int64 nTimeout)
{
if (addrConnect.ip == addrLocalHost.ip)
return NULL;
// Look for an existing connection
CNode* pnode = FindNode(addrConnect.ip);
if (pnode)
{
if (nTimeout != 0)
pnode->AddRef(nTimeout);
else
pnode->AddRef();
return pnode;
}
/// debug print
printf("trying connection %s lastseen=%.1fhrs lasttry=%.1fhrs\n",
addrConnect.ToString().c_str(),
(double)(addrConnect.nTime - GetAdjustedTime())/3600.0,
(double)(addrConnect.nLastTry - GetAdjustedTime())/3600.0);
CRITICAL_BLOCK(cs_mapAddresses)
mapAddresses[addrConnect.GetKey()].nLastTry = GetAdjustedTime();
// Connect
SOCKET hSocket;
if (ConnectSocket(addrConnect, hSocket))
{
/// debug print
printf("connected %s\n", addrConnect.ToString().c_str());
// Set to nonblocking
#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);
if (nTimeout != 0)
pnode->AddRef(nTimeout);
else
pnode->AddRef();
CRITICAL_BLOCK(cs_vNodes)
vNodes.push_back(pnode);
pnode->nTimeConnected = GetTime();
return pnode;
}
else
{
return NULL;
}
}
void CNode::CloseSocketDisconnect()
{
fDisconnect = true;
if (hSocket != INVALID_SOCKET)
{
if (fDebug)
printf("%s ", DateTimeStrFormat("%x %H:%M:%S", GetTime()).c_str());
printf("disconnecting node %s\n", addr.ToString().c_str());
closesocket(hSocket);
hSocket = INVALID_SOCKET;
}
}
void CNode::Cleanup()
{
// 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.
// Cancel subscriptions
for (unsigned int nChannel = 0; nChannel < vfSubscribe.size(); nChannel++)
if (vfSubscribe[nChannel])
CancelSubscribe(nChannel);
}
void ThreadSocketHandler(void* parg)
{
IMPLEMENT_RANDOMIZE_STACK(ThreadSocketHandler(parg));
try
{
vnThreadsRunning[0]++;
ThreadSocketHandler2(parg);
vnThreadsRunning[0]--;
}
catch (std::exception& e) {
vnThreadsRunning[0]--;
PrintException(&e, "ThreadSocketHandler()");
} catch (...) {
vnThreadsRunning[0]--;
throw; // support pthread_cancel()
}
printf("ThreadSocketHandler exiting\n");
}
void ThreadSocketHandler2(void* parg)
{
printf("ThreadSocketHandler started\n");
list<CNode*> vNodesDisconnected;
int nPrevNodeCount = 0;
loop
{
//
// Disconnect nodes
//
CRITICAL_BLOCK(cs_vNodes)
{
// Disconnect unused nodes
vector<CNode*> vNodesCopy = vNodes;
BOOST_FOREACH(CNode* pnode, vNodesCopy)
{
if (pnode->fDisconnect ||
(pnode->GetRefCount() <= 0 && pnode->vRecv.empty() && pnode->vSend.empty()))
{
// remove from vNodes
vNodes.erase(remove(vNodes.begin(), vNodes.end(), pnode), vNodes.end());
// close socket and cleanup
pnode->CloseSocketDisconnect();
pnode->Cleanup();
// hold in disconnected pool until all refs are released
pnode->nReleaseTime = max(pnode->nReleaseTime, GetTime() + 15 * 60);
if (pnode->fNetworkNode || pnode->fInbound)
pnode->Release();
vNodesDisconnected.push_back(pnode);
}
}
// Delete disconnected nodes
list<CNode*> vNodesDisconnectedCopy = vNodesDisconnected;
BOOST_FOREACH(CNode* pnode, vNodesDisconnectedCopy)
{
// wait until threads are done using it
if (pnode->GetRefCount() <= 0)
{
bool fDelete = false;
TRY_CRITICAL_BLOCK(pnode->cs_vSend)
TRY_CRITICAL_BLOCK(pnode->cs_vRecv)
TRY_CRITICAL_BLOCK(pnode->cs_mapRequests)
TRY_CRITICAL_BLOCK(pnode->cs_inventory)
fDelete = true;
if (fDelete)
{
vNodesDisconnected.remove(pnode);
delete pnode;
}
}
}
}
if (vNodes.size() != nPrevNodeCount)
{
nPrevNodeCount = vNodes.size();
MainFrameRepaint();
}
//
// Find which sockets have data to receive
//
struct timeval timeout;
timeout.tv_sec = 0;
timeout.tv_usec = 50000; // frequency to poll pnode->vSend
fd_set fdsetRecv;
fd_set fdsetSend;
fd_set fdsetError;
FD_ZERO(&fdsetRecv);
FD_ZERO(&fdsetSend);
FD_ZERO(&fdsetError);
SOCKET hSocketMax = 0;
if(hListenSocket != INVALID_SOCKET)
FD_SET(hListenSocket, &fdsetRecv);
hSocketMax = max(hSocketMax, hListenSocket);
CRITICAL_BLOCK(cs_vNodes)
{
BOOST_FOREACH(CNode* pnode, vNodes)
{
if (pnode->hSocket == INVALID_SOCKET)
continue;
FD_SET(pnode->hSocket, &fdsetRecv);
FD_SET(pnode->hSocket, &fdsetError);
hSocketMax = max(hSocketMax, pnode->hSocket);
TRY_CRITICAL_BLOCK(pnode->cs_vSend)
if (!pnode->vSend.empty())
FD_SET(pnode->hSocket, &fdsetSend);
}
}
vnThreadsRunning[0]--;
int nSelect = select(hSocketMax + 1, &fdsetRecv, &fdsetSend, &fdsetError, &timeout);
vnThreadsRunning[0]++;
if (fShutdown)
return;
if (nSelect == SOCKET_ERROR)
{
int nErr = WSAGetLastError();
if (hSocketMax > -1)
{
printf("socket select error %d\n", nErr);
for (int i = 0; i <= hSocketMax; i++)
FD_SET(i, &fdsetRecv);
}
FD_ZERO(&fdsetSend);
FD_ZERO(&fdsetError);
Sleep(timeout.tv_usec/1000);
}
//
// Accept new connections
//
if (hListenSocket != INVALID_SOCKET && FD_ISSET(hListenSocket, &fdsetRecv))
{
struct sockaddr_in sockaddr;
socklen_t len = sizeof(sockaddr);
SOCKET hSocket = accept(hListenSocket, (struct sockaddr*)&sockaddr, &len);
CAddress addr(sockaddr);
int nInbound = 0;
CRITICAL_BLOCK(cs_vNodes)
BOOST_FOREACH(CNode* pnode, vNodes)
if (pnode->fInbound)
nInbound++;
if (hSocket == INVALID_SOCKET)
{
if (WSAGetLastError() != WSAEWOULDBLOCK)
printf("socket error accept failed: %d\n", WSAGetLastError());
}
else if (nInbound >= GetArg("-maxconnections", 125) - MAX_OUTBOUND_CONNECTIONS)
{
closesocket(hSocket);
}
else
{
printf("accepted connection %s\n", addr.ToString().c_str());
CNode* pnode = new CNode(hSocket, addr, true);
pnode->AddRef();
CRITICAL_BLOCK(cs_vNodes)
vNodes.push_back(pnode);
}
}
//
// Service each socket
//
vector<CNode*> vNodesCopy;
CRITICAL_BLOCK(cs_vNodes)
{
vNodesCopy = vNodes;
BOOST_FOREACH(CNode* pnode, vNodesCopy)
pnode->AddRef();
}
BOOST_FOREACH(CNode* pnode, vNodesCopy)
{
if (fShutdown)
return;
//
// Receive
//
if (pnode->hSocket == INVALID_SOCKET)
continue;
if (FD_ISSET(pnode->hSocket, &fdsetRecv) || FD_ISSET(pnode->hSocket, &fdsetError))
{
TRY_CRITICAL_BLOCK(pnode->cs_vRecv)
{
CDataStream& vRecv = pnode->vRecv;
unsigned int nPos = vRecv.size();
if (nPos > ReceiveBufferSize()) {
if (!pnode->fDisconnect)
printf("socket recv flood control disconnect (%d bytes)\n", vRecv.size());
pnode->CloseSocketDisconnect();
}
else {
// typical socket buffer is 8K-64K
char pchBuf[0x10000];
int nBytes = recv(pnode->hSocket, pchBuf, sizeof(pchBuf), MSG_DONTWAIT);
if (nBytes > 0)
{
vRecv.resize(nPos + nBytes);
memcpy(&vRecv[nPos], pchBuf, nBytes);
pnode->nLastRecv = GetTime();
}
else if (nBytes == 0)
{
// socket closed gracefully
if (!pnode->fDisconnect)
printf("socket closed\n");
pnode->CloseSocketDisconnect();
}
else if (nBytes < 0)
{
// error
int nErr = WSAGetLastError();
if (nErr != WSAEWOULDBLOCK && nErr != WSAEMSGSIZE && nErr != WSAEINTR && nErr != WSAEINPROGRESS)
{
if (!pnode->fDisconnect)
printf("socket recv error %d\n", nErr);
pnode->CloseSocketDisconnect();
}
}
}
}
}
//
// Send
//
if (pnode->hSocket == INVALID_SOCKET)
continue;
if (FD_ISSET(pnode->hSocket, &fdsetSend))
{
TRY_CRITICAL_BLOCK(pnode->cs_vSend)
{
CDataStream& vSend = pnode->vSend;
if (!vSend.empty())
{
int nBytes = send(pnode->hSocket, &vSend[0], vSend.size(), MSG_NOSIGNAL | MSG_DONTWAIT);
if (nBytes > 0)
{
vSend.erase(vSend.begin(), vSend.begin() + nBytes);
pnode->nLastSend = GetTime();
}
else if (nBytes < 0)
{
// error
int nErr = WSAGetLastError();
if (nErr != WSAEWOULDBLOCK && nErr != WSAEMSGSIZE && nErr != WSAEINTR && nErr != WSAEINPROGRESS)
{
printf("socket send error %d\n", nErr);
pnode->CloseSocketDisconnect();
}
}
if (vSend.size() > SendBufferSize()) {
if (!pnode->fDisconnect)
printf("socket send flood control disconnect (%d bytes)\n", vSend.size());
pnode->CloseSocketDisconnect();
}
}
}
}
//
// Inactivity checking
//
if (pnode->vSend.empty())
pnode->nLastSendEmpty = GetTime();
if (GetTime() - pnode->nTimeConnected > 60)
{
if (pnode->nLastRecv == 0 || pnode->nLastSend == 0)
{
printf("socket no message in first 60 seconds, %d %d\n", pnode->nLastRecv != 0, pnode->nLastSend != 0);
pnode->fDisconnect = true;
}
else if (GetTime() - pnode->nLastSend > 90*60 && GetTime() - pnode->nLastSendEmpty > 90*60)
{
printf("socket not sending\n");
pnode->fDisconnect = true;
}
else if (GetTime() - pnode->nLastRecv > 90*60)
{
printf("socket inactivity timeout\n");
pnode->fDisconnect = true;
}
}
}
CRITICAL_BLOCK(cs_vNodes)
{
BOOST_FOREACH(CNode* pnode, vNodesCopy)
pnode->Release();
}
Sleep(10);
}
}
#ifdef USE_UPNP
void ThreadMapPort(void* parg)
{
IMPLEMENT_RANDOMIZE_STACK(ThreadMapPort(parg));
try
{
vnThreadsRunning[5]++;
ThreadMapPort2(parg);
vnThreadsRunning[5]--;
}
catch (std::exception& e) {
vnThreadsRunning[5]--;
PrintException(&e, "ThreadMapPort()");
} catch (...) {
vnThreadsRunning[5]--;
PrintException(NULL, "ThreadMapPort()");
}
printf("ThreadMapPort exiting\n");
}
void ThreadMapPort2(void* parg)
{
printf("ThreadMapPort started\n");
char port[6];
sprintf(port, "%d", GetListenPort());
const char * rootdescurl = 0;
const char * multicastif = 0;
const char * minissdpdpath = 0;
struct UPNPDev * devlist = 0;
char lanaddr[64];
devlist = upnpDiscover(2000, multicastif, minissdpdpath, 0);
struct UPNPUrls urls;
struct IGDdatas data;
int r;
r = UPNP_GetValidIGD(devlist, &urls, &data, lanaddr, sizeof(lanaddr));
if (r == 1)
{
char intClient[16];
char intPort[6];
string strDesc = "Bitcoin " + FormatFullVersion();
#ifndef __WXMSW__
r = UPNP_AddPortMapping(urls.controlURL, data.first.servicetype,
port, port, lanaddr, strDesc.c_str(), "TCP", 0);
#else
r = UPNP_AddPortMapping(urls.controlURL, data.first.servicetype,
port, port, lanaddr, strDesc.c_str(), "TCP", 0, "0");
#endif
if(r!=UPNPCOMMAND_SUCCESS)
printf("AddPortMapping(%s, %s, %s) failed with code %d (%s)\n",
port, port, lanaddr, r, strupnperror(r));
else
printf("UPnP Port Mapping successful.\n");
loop {
if (fShutdown || !fUseUPnP)
{
r = UPNP_DeletePortMapping(urls.controlURL, data.first.servicetype, port, "TCP", 0);
printf("UPNP_DeletePortMapping() returned : %d\n", r);
freeUPNPDevlist(devlist); devlist = 0;
FreeUPNPUrls(&urls);
return;
}
Sleep(2000);
}
} else {
printf("No valid UPnP IGDs found\n");
freeUPNPDevlist(devlist); devlist = 0;
if (r != 0)
FreeUPNPUrls(&urls);
loop {
if (fShutdown || !fUseUPnP)
return;
Sleep(2000);
}
}
}
void MapPort(bool fMapPort)
{
if (fUseUPnP != fMapPort)
{
fUseUPnP = fMapPort;
WriteSetting("fUseUPnP", fUseUPnP);
}
if (fUseUPnP && vnThreadsRunning[5] < 1)
{
if (!CreateThread(ThreadMapPort, NULL))
printf("Error: ThreadMapPort(ThreadMapPort) failed\n");
}
}
#endif
static const char *strDNSSeed[] = {
"bitseed.xf2.org",
"bitseed.bitcoin.org.uk",
"dnsseed.bluematt.me",
};
void DNSAddressSeed()
{
int found = 0;
if (!fTestNet)
{
printf("Loading addresses from DNS seeds (could take a while)\n");
CAddrDB addrDB;
addrDB.TxnBegin();
for (int seed_idx = 0; seed_idx < ARRAYLEN(strDNSSeed); seed_idx++) {
vector<CAddress> vaddr;
if (Lookup(strDNSSeed[seed_idx], vaddr, NODE_NETWORK, -1, true))
{
BOOST_FOREACH (CAddress& addr, vaddr)
{
if (addr.GetByte(3) != 127)
{
addr.nTime = 0;
AddAddress(addr, 0, &addrDB);
found++;
}
}
}
}
addrDB.TxnCommit(); // Save addresses (it's ok if this fails)
}
printf("%d addresses found from DNS seeds\n", found);
}
unsigned int pnSeed[] =
{
0x1ddb1032, 0x6242ce40, 0x52d6a445, 0x2dd7a445, 0x8a53cd47, 0x73263750, 0xda23c257, 0xecd4ed57,
0x0a40ec59, 0x75dce160, 0x7df76791, 0x89370bad, 0xa4f214ad, 0x767700ae, 0x638b0418, 0x868a1018,
0xcd9f332e, 0x0129653e, 0xcc92dc3e, 0x96671640, 0x56487e40, 0x5b66f440, 0xb1d01f41, 0xf1dc6041,
0xc1d12b42, 0x86ba1243, 0x6be4df43, 0x6d4cef43, 0xd18e0644, 0x1ab0b344, 0x6584a345, 0xe7c1a445,
0x58cea445, 0xc5daa445, 0x21dda445, 0x3d3b5346, 0x13e55347, 0x1080d24a, 0x8e611e4b, 0x81518e4b,
0x6c839e4b, 0xe2ad0a4c, 0xfbbc0a4c, 0x7f5b6e4c, 0x7244224e, 0x1300554e, 0x20690652, 0x5a48b652,
0x75c5c752, 0x4335cc54, 0x340fd154, 0x87c07455, 0x087b2b56, 0x8a133a57, 0xac23c257, 0x70374959,
0xfb63d45b, 0xb9a1685c, 0x180d765c, 0x674f645d, 0x04d3495e, 0x1de44b5e, 0x4ee8a362, 0x0ded1b63,
0xc1b04b6d, 0x8d921581, 0x97b7ea82, 0x1cf83a8e, 0x91490bad, 0x09dc75ae, 0x9a6d79ae, 0xa26d79ae,
0x0fd08fae, 0x0f3e3fb2, 0x4f944fb2, 0xcca448b8, 0x3ecd6ab8, 0xa9d5a5bc, 0x8d0119c1, 0x045997d5,
0xca019dd9, 0x0d526c4d, 0xabf1ba44, 0x66b1ab55, 0x1165f462, 0x3ed7cbad, 0xa38fae6e, 0x3bd2cbad,
0xd36f0547, 0x20df7840, 0x7a337742, 0x549f8e4b, 0x9062365c, 0xd399f562, 0x2b5274a1, 0x8edfa153,
0x3bffb347, 0x7074bf58, 0xb74fcbad, 0x5b5a795b, 0x02fa29ce, 0x5a6738d4, 0xe8a1d23e, 0xef98c445,
0x4b0f494c, 0xa2bc1e56, 0x7694ad63, 0xa4a800c3, 0x05fda6cd, 0x9f22175e, 0x364a795b, 0x536285d5,
0xac44c9d4, 0x0b06254d, 0x150c2fd4, 0x32a50dcc, 0xfd79ce48, 0xf15cfa53, 0x66c01e60, 0x6bc26661,
0xc03b47ae, 0x4dda1b81, 0x3285a4c1, 0x883ca96d, 0x35d60a4c, 0xdae09744, 0x2e314d61, 0x84e247cf,
0x6c814552, 0x3a1cc658, 0x98d8f382, 0xe584cb5b, 0x15e86057, 0x7b01504e, 0xd852dd48, 0x56382f56,
0x0a5df454, 0xa0d18d18, 0x2e89b148, 0xa79c114c, 0xcbdcd054, 0x5523bc43, 0xa9832640, 0x8a066144,
0x3894c3bc, 0xab76bf58, 0x6a018ac1, 0xfebf4f43, 0x2f26c658, 0x31102f4e, 0x85e929d5, 0x2a1c175e,
0xfc6c2cd1, 0x27b04b6d, 0xdf024650, 0x161748b8, 0x28be6580, 0x57be6580, 0x1cee677a, 0xaa6bb742,
0x9a53964b, 0x0a5a2d4d, 0x2434c658, 0x9a494f57, 0x1ebb0e48, 0xf610b85d, 0x077ecf44, 0x085128bc,
0x5ba17a18, 0x27ca1b42, 0xf8a00b56, 0xfcd4c257, 0xcf2fc15e, 0xd897e052, 0x4cada04f, 0x2f35f6d5,
0x382ce8c9, 0xe523984b, 0x3f946846, 0x60c8be43, 0x41da6257, 0xde0be142, 0xae8a544b, 0xeff0c254,
0x1e0f795b, 0xaeb28890, 0xca16acd9, 0x1e47ddd8, 0x8c8c4829, 0xd27dc747, 0xd53b1663, 0x4096b163,
0x9c8dd958, 0xcb12f860, 0x9e79305c, 0x40c1a445, 0x4a90c2bc, 0x2c3a464d, 0x2727f23c, 0x30b04b6d,
0x59024cb8, 0xa091e6ad, 0x31b04b6d, 0xc29d46a6, 0x63934fb2, 0xd9224dbe, 0x9f5910d8, 0x7f530a6b,
0x752e9c95, 0x65453548, 0xa484be46, 0xce5a1b59, 0x710e0718, 0x46a13d18, 0xdaaf5318, 0xc4a8ff53,
0x87abaa52, 0xb764cf51, 0xb2025d4a, 0x6d351e41, 0xc035c33e, 0xa432c162, 0x61ef34ae, 0xd16fddbc,
0x0870e8c1, 0x3070e8c1, 0x9c71e8c1, 0xa4992363, 0x85a1f663, 0x4184e559, 0x18d96ed8, 0x17b8dbd5,
0x60e7cd18, 0xe5ee104c, 0xab17ac62, 0x1e786e1b, 0x5d23b762, 0xf2388fae, 0x88270360, 0x9e5b3d80,
0x7da518b2, 0xb5613b45, 0x1ad41f3e, 0xd550854a, 0x8617e9a9, 0x925b229c, 0xf2e92542, 0x47af0544,
0x73b5a843, 0xb9b7a0ad, 0x03a748d0, 0x0a6ff862, 0x6694df62, 0x3bfac948, 0x8e098f4f, 0x746916c3,
0x02f38e4f, 0x40bb1243, 0x6a54d162, 0x6008414b, 0xa513794c, 0x514aa343, 0x63781747, 0xdbb6795b,
0xed065058, 0x42d24b46, 0x1518794c, 0x9b271681, 0x73e4ffad, 0x0654784f, 0x438dc945, 0x641846a6,
0x2d1b0944, 0x94b59148, 0x8d369558, 0xa5a97662, 0x8b705b42, 0xce9204ae, 0x8d584450, 0x2df61555,
0xeebff943, 0x2e75fb4d, 0x3ef8fc57, 0x9921135e, 0x8e31042e, 0xb5afad43, 0x89ecedd1, 0x9cfcc047,
0x8fcd0f4c, 0xbe49f5ad, 0x146a8d45, 0x98669ab8, 0x98d9175e, 0xd1a8e46d, 0x839a3ab8, 0x40a0016c,
0x6d27c257, 0x977fffad, 0x7baa5d5d, 0x1213be43, 0xb167e5a9, 0x640fe8ca, 0xbc9ea655, 0x0f820a4c,
0x0f097059, 0x69ac957c, 0x366d8453, 0xb1ba2844, 0x8857f081, 0x70b5be63, 0xc545454b, 0xaf36ded1,
0xb5a4b052, 0x21f062d1, 0x72ab89b2, 0x74a45318, 0x8312e6bc, 0xb916965f, 0x8aa7c858, 0xfe7effad,
};
void ThreadOpenConnections(void* parg)
{
IMPLEMENT_RANDOMIZE_STACK(ThreadOpenConnections(parg));
try
{
vnThreadsRunning[1]++;
ThreadOpenConnections2(parg);
vnThreadsRunning[1]--;
}
catch (std::exception& e) {
vnThreadsRunning[1]--;
PrintException(&e, "ThreadOpenConnections()");
} catch (...) {
vnThreadsRunning[1]--;
PrintException(NULL, "ThreadOpenConnections()");
}
printf("ThreadOpenConnections exiting\n");
}
void ThreadOpenConnections2(void* parg)
{
printf("ThreadOpenConnections started\n");
// Connect to specific addresses
if (mapArgs.count("-connect"))
{
for (int64 nLoop = 0;; nLoop++)
{
BOOST_FOREACH(string strAddr, mapMultiArgs["-connect"])
{
CAddress addr(strAddr, fAllowDNS);
if (addr.IsValid())
OpenNetworkConnection(addr);
for (int i = 0; i < 10 && i < nLoop; i++)
{
Sleep(500);
if (fShutdown)
return;
}
}
}
}
// Connect to manually added nodes first
if (mapArgs.count("-addnode"))
{
BOOST_FOREACH(string strAddr, mapMultiArgs["-addnode"])
{
CAddress addr(strAddr, fAllowDNS);
if (addr.IsValid())
{
OpenNetworkConnection(addr);
Sleep(500);
if (fShutdown)
return;
}
}
}
// Initiate network connections
int64 nStart = GetTime();
loop
{
// Limit outbound connections
vnThreadsRunning[1]--;
Sleep(500);
loop
{
int nOutbound = 0;
CRITICAL_BLOCK(cs_vNodes)
BOOST_FOREACH(CNode* pnode, vNodes)
if (!pnode->fInbound)
nOutbound++;
int nMaxOutboundConnections = MAX_OUTBOUND_CONNECTIONS;
nMaxOutboundConnections = min(nMaxOutboundConnections, (int)GetArg("-maxconnections", 125));
if (nOutbound < nMaxOutboundConnections)
break;
Sleep(2000);
if (fShutdown)
return;
}
vnThreadsRunning[1]++;
if (fShutdown)
return;
CRITICAL_BLOCK(cs_mapAddresses)
{
// Add seed nodes if IRC isn't working
static bool fSeedUsed;
bool fTOR = (fUseProxy && addrProxy.port == htons(9050));
if (mapAddresses.empty() && (GetTime() - nStart > 60 || fTOR) && !fTestNet)
{
for (int i = 0; i < ARRAYLEN(pnSeed); i++)
{
// It'll only connect to one or two seed nodes because once it connects,
// it'll get a pile of addresses with newer timestamps.
CAddress addr;
addr.ip = pnSeed[i];
addr.nTime = 0;
AddAddress(addr);
}
fSeedUsed = true;
}
if (fSeedUsed && mapAddresses.size() > ARRAYLEN(pnSeed) + 100)
{
// Disconnect seed nodes
set<unsigned int> setSeed(pnSeed, pnSeed + ARRAYLEN(pnSeed));
static int64 nSeedDisconnected;
if (nSeedDisconnected == 0)
{
nSeedDisconnected = GetTime();
CRITICAL_BLOCK(cs_vNodes)
BOOST_FOREACH(CNode* pnode, vNodes)
if (setSeed.count(pnode->addr.ip))
pnode->fDisconnect = true;
}
// Keep setting timestamps to 0 so they won't reconnect
if (GetTime() - nSeedDisconnected < 60 * 60)
{
BOOST_FOREACH(PAIRTYPE(const vector<unsigned char>, CAddress)& item, mapAddresses)
{
if (setSeed.count(item.second.ip) && item.second.nTime != 0)
{
item.second.nTime = 0;
CAddrDB().WriteAddress(item.second);
}
}
}
}
}
//
// Choose an address to connect to based on most recently seen
//
CAddress addrConnect;
int64 nBest = INT64_MIN;
// Only connect to one address per a.b.?.? range.
// Do this here so we don't have to critsect vNodes inside mapAddresses critsect.
set<unsigned int> setConnected;
CRITICAL_BLOCK(cs_vNodes)
BOOST_FOREACH(CNode* pnode, vNodes)
setConnected.insert(pnode->addr.ip & 0x0000ffff);
CRITICAL_BLOCK(cs_mapAddresses)
{
BOOST_FOREACH(const PAIRTYPE(vector<unsigned char>, CAddress)& item, mapAddresses)
{
const CAddress& addr = item.second;
if (!addr.IsIPv4() || !addr.IsValid() || setConnected.count(addr.ip & 0x0000ffff))
continue;
int64 nSinceLastSeen = GetAdjustedTime() - addr.nTime;
int64 nSinceLastTry = GetAdjustedTime() - addr.nLastTry;
// Randomize the order in a deterministic way, putting the standard port first
int64 nRandomizer = (uint64)(nStart * 4951 + addr.nLastTry * 9567851 + addr.ip * 7789) % (2 * 60 * 60);
if (addr.port != htons(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;
// 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;
// Only try the old stuff if we don't have enough connections
if (vNodes.size() >= 8 && nSinceLastSeen > 24 * 60 * 60)
continue;
// 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;
}
}
}
if (addrConnect.IsValid())
OpenNetworkConnection(addrConnect);
}
}
bool OpenNetworkConnection(const CAddress& addrConnect)
{
//
// Initiate outbound network connection
//
if (fShutdown)
return false;
if (addrConnect.ip == addrLocalHost.ip || !addrConnect.IsIPv4() || FindNode(addrConnect.ip))
return false;
vnThreadsRunning[1]--;
CNode* pnode = ConnectNode(addrConnect);
vnThreadsRunning[1]++;
if (fShutdown)
return false;
if (!pnode)
return false;
pnode->fNetworkNode = true;
return true;
}
void ThreadMessageHandler(void* parg)
{
IMPLEMENT_RANDOMIZE_STACK(ThreadMessageHandler(parg));
try
{
vnThreadsRunning[2]++;
ThreadMessageHandler2(parg);
vnThreadsRunning[2]--;
}
catch (std::exception& e) {
vnThreadsRunning[2]--;
PrintException(&e, "ThreadMessageHandler()");
} catch (...) {
vnThreadsRunning[2]--;
PrintException(NULL, "ThreadMessageHandler()");
}
printf("ThreadMessageHandler exiting\n");
}
void ThreadMessageHandler2(void* parg)
{
printf("ThreadMessageHandler started\n");
SetThreadPriority(THREAD_PRIORITY_BELOW_NORMAL);
while (!fShutdown)
{
vector<CNode*> vNodesCopy;
CRITICAL_BLOCK(cs_vNodes)
{
vNodesCopy = vNodes;
BOOST_FOREACH(CNode* pnode, vNodesCopy)
pnode->AddRef();
}
// Poll the connected nodes for messages
CNode* pnodeTrickle = NULL;
if (!vNodesCopy.empty())
pnodeTrickle = vNodesCopy[GetRand(vNodesCopy.size())];
BOOST_FOREACH(CNode* pnode, vNodesCopy)
{
// Receive messages
TRY_CRITICAL_BLOCK(pnode->cs_vRecv)
ProcessMessages(pnode);
if (fShutdown)
return;
// Send messages
TRY_CRITICAL_BLOCK(pnode->cs_vSend)
SendMessages(pnode, pnode == pnodeTrickle);
if (fShutdown)
return;
}
CRITICAL_BLOCK(cs_vNodes)
{
BOOST_FOREACH(CNode* pnode, vNodesCopy)
pnode->Release();
}
// Wait and allow messages to bunch up.
// Reduce vnThreadsRunning so StopNode has permission to exit while
// we're sleeping, but we must always check fShutdown after doing this.
vnThreadsRunning[2]--;
Sleep(100);
if (fRequestShutdown)
Shutdown(NULL);
vnThreadsRunning[2]++;
if (fShutdown)
return;
}
}
bool BindListenPort(string& strError)
{
strError = "";
int nOne = 1;
addrLocalHost.port = htons(GetListenPort());
#ifdef __WXMSW__
// Initialize Windows Sockets
WSADATA wsadata;
int ret = WSAStartup(MAKEWORD(2,2), &wsadata);
if (ret != NO_ERROR)
{
strError = strprintf("Error: TCP/IP socket library failed to start (WSAStartup returned error %d)", ret);
printf("%s\n", strError.c_str());
return false;
}
#endif
// Create socket for listening for incoming connections
hListenSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (hListenSocket == INVALID_SOCKET)
{
strError = strprintf("Error: Couldn't open socket for incoming connections (socket returned error %d)", WSAGetLastError());
printf("%s\n", strError.c_str());
return false;
}
#ifdef BSD
// Different way of disabling SIGPIPE on BSD
setsockopt(hListenSocket, SOL_SOCKET, SO_NOSIGPIPE, (void*)&nOne, sizeof(int));
#endif
#ifndef __WXMSW__
// Allow binding if the port is still in TIME_WAIT state after
// the program was closed and restarted. Not an issue on windows.
setsockopt(hListenSocket, SOL_SOCKET, SO_REUSEADDR, (void*)&nOne, sizeof(int));
#endif
#ifdef __WXMSW__
// Set to nonblocking, incoming connections will also inherit this
if (ioctlsocket(hListenSocket, FIONBIO, (u_long*)&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 (error %d)", WSAGetLastError());
printf("%s\n", strError.c_str());
return false;
}
// The sockaddr_in structure specifies the address family,
// IP address, and port for the socket that is being bound
struct sockaddr_in sockaddr;
memset(&sockaddr, 0, sizeof(sockaddr));
sockaddr.sin_family = AF_INET;
sockaddr.sin_addr.s_addr = INADDR_ANY; // bind to all IPs on this computer
sockaddr.sin_port = htons(GetListenPort());
if (::bind(hListenSocket, (struct sockaddr*)&sockaddr, sizeof(sockaddr)) == SOCKET_ERROR)
{
int nErr = WSAGetLastError();
if (nErr == WSAEADDRINUSE)
strError = strprintf(_("Unable to bind to port %d on this computer. Bitcoin is probably already running."), ntohs(sockaddr.sin_port));
else
strError = strprintf("Error: Unable to bind to port %d on this computer (bind returned error %d)", ntohs(sockaddr.sin_port), nErr);
printf("%s\n", strError.c_str());
return false;
}
printf("Bound to port %d\n", ntohs(sockaddr.sin_port));
// Listen for incoming connections
if (listen(hListenSocket, SOMAXCONN) == SOCKET_ERROR)
{
strError = strprintf("Error: Listening for incoming connections failed (listen returned error %d)", WSAGetLastError());
printf("%s\n", strError.c_str());
return false;
}
return true;
}
void StartNode(void* parg)
{
if (pnodeLocalHost == NULL)
pnodeLocalHost = new CNode(INVALID_SOCKET, CAddress("127.0.0.1", 0, false, nLocalServices));
#ifdef __WXMSW__
// Get local host ip
char pszHostName[1000] = "";
if (gethostname(pszHostName, sizeof(pszHostName)) != SOCKET_ERROR)
{
vector<CAddress> vaddr;
if (Lookup(pszHostName, vaddr, nLocalServices, -1, true))
BOOST_FOREACH (const CAddress &addr, vaddr)
if (addr.GetByte(3) != 127)
{
addrLocalHost = addr;
break;
}
}
#else
// Get local host ip
struct ifaddrs* myaddrs;
if (getifaddrs(&myaddrs) == 0)
{
for (struct ifaddrs* ifa = myaddrs; ifa != NULL; ifa = ifa->ifa_next)
{
if (ifa->ifa_addr == NULL) continue;
if ((ifa->ifa_flags & IFF_UP) == 0) continue;
if (strcmp(ifa->ifa_name, "lo") == 0) continue;
if (strcmp(ifa->ifa_name, "lo0") == 0) continue;
char pszIP[100];
if (ifa->ifa_addr->sa_family == AF_INET)
{
struct sockaddr_in* s4 = (struct sockaddr_in*)(ifa->ifa_addr);
if (inet_ntop(ifa->ifa_addr->sa_family, (void*)&(s4->sin_addr), pszIP, sizeof(pszIP)) != NULL)
printf("ipv4 %s: %s\n", ifa->ifa_name, pszIP);
// Take the first IP that isn't loopback 127.x.x.x
CAddress addr(*(unsigned int*)&s4->sin_addr, GetListenPort(), nLocalServices);
if (addr.IsValid() && addr.GetByte(3) != 127)
{
addrLocalHost = addr;
break;
}
}
else if (ifa->ifa_addr->sa_family == AF_INET6)
{
struct sockaddr_in6* s6 = (struct sockaddr_in6*)(ifa->ifa_addr);
if (inet_ntop(ifa->ifa_addr->sa_family, (void*)&(s6->sin6_addr), pszIP, sizeof(pszIP)) != NULL)
printf("ipv6 %s: %s\n", ifa->ifa_name, pszIP);
}
}
freeifaddrs(myaddrs);
}
#endif
printf("addrLocalHost = %s\n", addrLocalHost.ToString().c_str());
if (fUseProxy || mapArgs.count("-connect") || fNoListen)
{
// Proxies can't take incoming connections
addrLocalHost.ip = CAddress("0.0.0.0").ip;
printf("addrLocalHost = %s\n", addrLocalHost.ToString().c_str());
}
else
{
CreateThread(ThreadGetMyExternalIP, NULL);
}
//
// Start threads
//
// Map ports with UPnP
if (fHaveUPnP)
MapPort(fUseUPnP);
// Get addresses from IRC and advertise ours
if (!CreateThread(ThreadIRCSeed, NULL))
printf("Error: CreateThread(ThreadIRCSeed) failed\n");
// Send and receive from sockets, accept connections
CreateThread(ThreadSocketHandler, NULL, true);
// Initiate outbound connections
if (!CreateThread(ThreadOpenConnections, NULL))
printf("Error: CreateThread(ThreadOpenConnections) failed\n");
// Process messages
if (!CreateThread(ThreadMessageHandler, NULL))
printf("Error: CreateThread(ThreadMessageHandler) failed\n");
// Generate coins in the background
GenerateBitcoins(fGenerateBitcoins, pwalletMain);
}
bool StopNode()
{
printf("StopNode()\n");
fShutdown = true;
nTransactionsUpdated++;
int64 nStart = GetTime();
while (vnThreadsRunning[0] > 0 || vnThreadsRunning[2] > 0 || vnThreadsRunning[3] > 0 || vnThreadsRunning[4] > 0
#ifdef USE_UPNP
|| vnThreadsRunning[5] > 0
#endif
)
{
if (GetTime() - nStart > 20)
break;
Sleep(20);
}
if (vnThreadsRunning[0] > 0) printf("ThreadSocketHandler still running\n");
if (vnThreadsRunning[1] > 0) printf("ThreadOpenConnections still running\n");
if (vnThreadsRunning[2] > 0) printf("ThreadMessageHandler still running\n");
if (vnThreadsRunning[3] > 0) printf("ThreadBitcoinMiner still running\n");
if (vnThreadsRunning[4] > 0) printf("ThreadRPCServer still running\n");
if (fHaveUPnP && vnThreadsRunning[5] > 0) printf("ThreadMapPort still running\n");
while (vnThreadsRunning[2] > 0 || vnThreadsRunning[4] > 0)
Sleep(20);
Sleep(50);
return true;
}
class CNetCleanup
{
public:
CNetCleanup()
{
}
~CNetCleanup()
{
// Close sockets
BOOST_FOREACH(CNode* pnode, vNodes)
if (pnode->hSocket != INVALID_SOCKET)
closesocket(pnode->hSocket);
if (hListenSocket != INVALID_SOCKET)
if (closesocket(hListenSocket) == SOCKET_ERROR)
printf("closesocket(hListenSocket) failed with error %d\n", WSAGetLastError());
#ifdef __WXMSW__
// Shutdown Windows Sockets
WSACleanup();
#endif
}
}
instance_of_cnetcleanup;