mirror of
https://github.com/dashpay/dash.git
synced 2024-12-25 12:02:48 +01:00
2032 lines
60 KiB
C++
2032 lines
60 KiB
C++
// Copyright (c) 2009-2010 Satoshi Nakamoto
|
|
// Copyright (c) 2009-2013 The Bitcoin developers
|
|
// Distributed under the MIT/X11 software license, see the accompanying
|
|
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
|
|
|
|
#if defined(HAVE_CONFIG_H)
|
|
#include "bitcoin-config.h"
|
|
#endif
|
|
|
|
#include "net.h"
|
|
|
|
#include "addrman.h"
|
|
#include "chainparams.h"
|
|
#include "core.h"
|
|
#include "ui_interface.h"
|
|
|
|
#ifdef WIN32
|
|
#include <string.h>
|
|
#else
|
|
#include <fcntl.h>
|
|
#endif
|
|
|
|
#ifdef USE_UPNP
|
|
#include <miniupnpc/miniupnpc.h>
|
|
#include <miniupnpc/miniwget.h>
|
|
#include <miniupnpc/upnpcommands.h>
|
|
#include <miniupnpc/upnperrors.h>
|
|
#endif
|
|
|
|
// Dump addresses to peers.dat every 15 minutes (900s)
|
|
#define DUMP_ADDRESSES_INTERVAL 900
|
|
|
|
#if !defined(HAVE_MSG_NOSIGNAL) && !defined(MSG_NOSIGNAL)
|
|
#define MSG_NOSIGNAL 0
|
|
#endif
|
|
|
|
using namespace std;
|
|
using namespace boost;
|
|
|
|
static const int MAX_OUTBOUND_CONNECTIONS = 8;
|
|
|
|
bool OpenNetworkConnection(const CAddress& addrConnect, CSemaphoreGrant *grantOutbound = NULL, const char *strDest = NULL, bool fOneShot = false);
|
|
|
|
|
|
struct LocalServiceInfo {
|
|
int nScore;
|
|
int nPort;
|
|
};
|
|
|
|
//
|
|
// Global state variables
|
|
//
|
|
bool fDiscover = true;
|
|
uint64_t nLocalServices = NODE_NETWORK;
|
|
static CCriticalSection cs_mapLocalHost;
|
|
static map<CNetAddr, LocalServiceInfo> mapLocalHost;
|
|
static bool vfReachable[NET_MAX] = {};
|
|
static bool vfLimited[NET_MAX] = {};
|
|
static CNode* pnodeLocalHost = NULL;
|
|
static CNode* pnodeSync = NULL;
|
|
uint64_t nLocalHostNonce = 0;
|
|
static std::vector<SOCKET> vhListenSocket;
|
|
CAddrMan addrman;
|
|
int nMaxConnections = 125;
|
|
|
|
vector<CNode*> vNodes;
|
|
CCriticalSection cs_vNodes;
|
|
map<CInv, CDataStream> mapRelay;
|
|
deque<pair<int64_t, CInv> > vRelayExpiration;
|
|
CCriticalSection cs_mapRelay;
|
|
limitedmap<CInv, int64_t> mapAlreadyAskedFor(MAX_INV_SZ);
|
|
|
|
static deque<string> vOneShots;
|
|
CCriticalSection cs_vOneShots;
|
|
|
|
set<CNetAddr> setservAddNodeAddresses;
|
|
CCriticalSection cs_setservAddNodeAddresses;
|
|
|
|
vector<std::string> vAddedNodes;
|
|
CCriticalSection cs_vAddedNodes;
|
|
|
|
NodeId nLastNodeId = 0;
|
|
CCriticalSection cs_nLastNodeId;
|
|
|
|
static CSemaphore *semOutbound = NULL;
|
|
|
|
// Signals for message handling
|
|
static CNodeSignals g_signals;
|
|
CNodeSignals& GetNodeSignals() { return g_signals; }
|
|
|
|
void AddOneShot(string strDest)
|
|
{
|
|
LOCK(cs_vOneShots);
|
|
vOneShots.push_back(strDest);
|
|
}
|
|
|
|
unsigned short GetListenPort()
|
|
{
|
|
return (unsigned short)(GetArg("-port", Params().GetDefaultPort()));
|
|
}
|
|
|
|
// find 'best' local address for a particular peer
|
|
bool GetLocal(CService& addr, const CNetAddr *paddrPeer)
|
|
{
|
|
if (fNoListen)
|
|
return false;
|
|
|
|
int nBestScore = -1;
|
|
int nBestReachability = -1;
|
|
{
|
|
LOCK(cs_mapLocalHost);
|
|
for (map<CNetAddr, LocalServiceInfo>::iterator it = mapLocalHost.begin(); it != mapLocalHost.end(); it++)
|
|
{
|
|
int nScore = (*it).second.nScore;
|
|
int nReachability = (*it).first.GetReachabilityFrom(paddrPeer);
|
|
if (nReachability > nBestReachability || (nReachability == nBestReachability && nScore > nBestScore))
|
|
{
|
|
addr = CService((*it).first, (*it).second.nPort);
|
|
nBestReachability = nReachability;
|
|
nBestScore = nScore;
|
|
}
|
|
}
|
|
}
|
|
return nBestScore >= 0;
|
|
}
|
|
|
|
// get best local address for a particular peer as a CAddress
|
|
CAddress GetLocalAddress(const CNetAddr *paddrPeer)
|
|
{
|
|
CAddress ret(CService("0.0.0.0",0),0);
|
|
CService addr;
|
|
if (GetLocal(addr, paddrPeer))
|
|
{
|
|
ret = CAddress(addr);
|
|
ret.nServices = nLocalServices;
|
|
ret.nTime = GetAdjustedTime();
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
bool RecvLine(SOCKET hSocket, string& strLine)
|
|
{
|
|
strLine = "";
|
|
while (true)
|
|
{
|
|
char c;
|
|
int nBytes = recv(hSocket, &c, 1, 0);
|
|
if (nBytes > 0)
|
|
{
|
|
if (c == '\n')
|
|
continue;
|
|
if (c == '\r')
|
|
return true;
|
|
strLine += c;
|
|
if (strLine.size() >= 9000)
|
|
return true;
|
|
}
|
|
else if (nBytes <= 0)
|
|
{
|
|
boost::this_thread::interruption_point();
|
|
if (nBytes < 0)
|
|
{
|
|
int nErr = WSAGetLastError();
|
|
if (nErr == WSAEMSGSIZE)
|
|
continue;
|
|
if (nErr == WSAEWOULDBLOCK || nErr == WSAEINTR || nErr == WSAEINPROGRESS)
|
|
{
|
|
MilliSleep(10);
|
|
continue;
|
|
}
|
|
}
|
|
if (!strLine.empty())
|
|
return true;
|
|
if (nBytes == 0)
|
|
{
|
|
// socket closed
|
|
LogPrint("net", "socket closed\n");
|
|
return false;
|
|
}
|
|
else
|
|
{
|
|
// socket error
|
|
int nErr = WSAGetLastError();
|
|
LogPrint("net", "recv failed: %d\n", nErr);
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// used when scores of local addresses may have changed
|
|
// pushes better local address to peers
|
|
void static AdvertizeLocal()
|
|
{
|
|
LOCK(cs_vNodes);
|
|
BOOST_FOREACH(CNode* pnode, vNodes)
|
|
{
|
|
if (pnode->fSuccessfullyConnected)
|
|
{
|
|
CAddress addrLocal = GetLocalAddress(&pnode->addr);
|
|
if (addrLocal.IsRoutable() && (CService)addrLocal != (CService)pnode->addrLocal)
|
|
{
|
|
pnode->PushAddress(addrLocal);
|
|
pnode->addrLocal = addrLocal;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void SetReachable(enum Network net, bool fFlag)
|
|
{
|
|
LOCK(cs_mapLocalHost);
|
|
vfReachable[net] = fFlag;
|
|
if (net == NET_IPV6 && fFlag)
|
|
vfReachable[NET_IPV4] = true;
|
|
}
|
|
|
|
// learn a new local address
|
|
bool AddLocal(const CService& addr, int nScore)
|
|
{
|
|
if (!addr.IsRoutable())
|
|
return false;
|
|
|
|
if (!fDiscover && nScore < LOCAL_MANUAL)
|
|
return false;
|
|
|
|
if (IsLimited(addr))
|
|
return false;
|
|
|
|
LogPrintf("AddLocal(%s,%i)\n", addr.ToString().c_str(), nScore);
|
|
|
|
{
|
|
LOCK(cs_mapLocalHost);
|
|
bool fAlready = mapLocalHost.count(addr) > 0;
|
|
LocalServiceInfo &info = mapLocalHost[addr];
|
|
if (!fAlready || nScore >= info.nScore) {
|
|
info.nScore = nScore + (fAlready ? 1 : 0);
|
|
info.nPort = addr.GetPort();
|
|
}
|
|
SetReachable(addr.GetNetwork());
|
|
}
|
|
|
|
AdvertizeLocal();
|
|
|
|
return true;
|
|
}
|
|
|
|
bool AddLocal(const CNetAddr &addr, int nScore)
|
|
{
|
|
return AddLocal(CService(addr, GetListenPort()), nScore);
|
|
}
|
|
|
|
/** Make a particular network entirely off-limits (no automatic connects to it) */
|
|
void SetLimited(enum Network net, bool fLimited)
|
|
{
|
|
if (net == NET_UNROUTABLE)
|
|
return;
|
|
LOCK(cs_mapLocalHost);
|
|
vfLimited[net] = fLimited;
|
|
}
|
|
|
|
bool IsLimited(enum Network net)
|
|
{
|
|
LOCK(cs_mapLocalHost);
|
|
return vfLimited[net];
|
|
}
|
|
|
|
bool IsLimited(const CNetAddr &addr)
|
|
{
|
|
return IsLimited(addr.GetNetwork());
|
|
}
|
|
|
|
/** vote for a local address */
|
|
bool SeenLocal(const CService& addr)
|
|
{
|
|
{
|
|
LOCK(cs_mapLocalHost);
|
|
if (mapLocalHost.count(addr) == 0)
|
|
return false;
|
|
mapLocalHost[addr].nScore++;
|
|
}
|
|
|
|
AdvertizeLocal();
|
|
|
|
return true;
|
|
}
|
|
|
|
/** check whether a given address is potentially local */
|
|
bool IsLocal(const CService& addr)
|
|
{
|
|
LOCK(cs_mapLocalHost);
|
|
return mapLocalHost.count(addr) > 0;
|
|
}
|
|
|
|
/** check whether a given address is in a network we can probably connect to */
|
|
bool IsReachable(const CNetAddr& addr)
|
|
{
|
|
LOCK(cs_mapLocalHost);
|
|
enum Network net = addr.GetNetwork();
|
|
return vfReachable[net] && !vfLimited[net];
|
|
}
|
|
|
|
bool GetMyExternalIP2(const CService& addrConnect, const char* pszGet, const char* pszKeyword, CNetAddr& 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
|
|
{
|
|
while (true)
|
|
{
|
|
if (!RecvLine(hSocket, strLine))
|
|
{
|
|
closesocket(hSocket);
|
|
return false;
|
|
}
|
|
if (pszKeyword == NULL)
|
|
break;
|
|
if (strLine.find(pszKeyword) != string::npos)
|
|
{
|
|
strLine = strLine.substr(strLine.find(pszKeyword) + strlen(pszKeyword));
|
|
break;
|
|
}
|
|
}
|
|
closesocket(hSocket);
|
|
if (strLine.find("<") != string::npos)
|
|
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);
|
|
CService addr(strLine,0,true);
|
|
LogPrintf("GetMyExternalIP() received [%s] %s\n", strLine.c_str(), addr.ToString().c_str());
|
|
if (!addr.IsValid() || !addr.IsRoutable())
|
|
return false;
|
|
ipRet.SetIP(addr);
|
|
return true;
|
|
}
|
|
}
|
|
closesocket(hSocket);
|
|
return error("GetMyExternalIP() : connection closed");
|
|
}
|
|
|
|
bool GetMyExternalIP(CNetAddr& ipRet)
|
|
{
|
|
CService addrConnect;
|
|
const char* pszGet;
|
|
const char* pszKeyword;
|
|
|
|
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 web server that prints the client IP:
|
|
// <?php echo $_SERVER["REMOTE_ADDR"]; ?>
|
|
if (nHost == 1)
|
|
{
|
|
addrConnect = CService("91.198.22.70", 80); // checkip.dyndns.org
|
|
|
|
if (nLookup == 1)
|
|
{
|
|
CService 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 = CService("74.208.43.192", 80); // www.showmyip.com
|
|
|
|
if (nLookup == 1)
|
|
{
|
|
CService 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()
|
|
{
|
|
CNetAddr addrLocalHost;
|
|
if (GetMyExternalIP(addrLocalHost))
|
|
{
|
|
LogPrintf("GetMyExternalIP() returned %s\n", addrLocalHost.ToStringIP().c_str());
|
|
AddLocal(addrLocalHost, LOCAL_HTTP);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
void AddressCurrentlyConnected(const CService& addr)
|
|
{
|
|
addrman.Connected(addr);
|
|
}
|
|
|
|
|
|
|
|
|
|
uint64_t CNode::nTotalBytesRecv = 0;
|
|
uint64_t CNode::nTotalBytesSent = 0;
|
|
CCriticalSection CNode::cs_totalBytesRecv;
|
|
CCriticalSection CNode::cs_totalBytesSent;
|
|
|
|
CNode* FindNode(const CNetAddr& ip)
|
|
{
|
|
LOCK(cs_vNodes);
|
|
BOOST_FOREACH(CNode* pnode, vNodes)
|
|
if ((CNetAddr)pnode->addr == ip)
|
|
return (pnode);
|
|
return NULL;
|
|
}
|
|
|
|
CNode* FindNode(std::string addrName)
|
|
{
|
|
LOCK(cs_vNodes);
|
|
BOOST_FOREACH(CNode* pnode, vNodes)
|
|
if (pnode->addrName == addrName)
|
|
return (pnode);
|
|
return NULL;
|
|
}
|
|
|
|
CNode* FindNode(const CService& addr)
|
|
{
|
|
LOCK(cs_vNodes);
|
|
BOOST_FOREACH(CNode* pnode, vNodes)
|
|
if ((CService)pnode->addr == addr)
|
|
return (pnode);
|
|
return NULL;
|
|
}
|
|
|
|
CNode* ConnectNode(CAddress addrConnect, const char *pszDest)
|
|
{
|
|
if (pszDest == NULL) {
|
|
if (IsLocal(addrConnect))
|
|
return NULL;
|
|
|
|
// Look for an existing connection
|
|
CNode* pnode = FindNode((CService)addrConnect);
|
|
if (pnode)
|
|
{
|
|
pnode->AddRef();
|
|
return pnode;
|
|
}
|
|
}
|
|
|
|
|
|
/// debug print
|
|
LogPrint("net", "trying connection %s lastseen=%.1fhrs\n",
|
|
pszDest ? pszDest : addrConnect.ToString().c_str(),
|
|
pszDest ? 0 : (double)(GetAdjustedTime() - addrConnect.nTime)/3600.0);
|
|
|
|
// Connect
|
|
SOCKET hSocket;
|
|
if (pszDest ? ConnectSocketByName(addrConnect, hSocket, pszDest, Params().GetDefaultPort()) : ConnectSocket(addrConnect, hSocket))
|
|
{
|
|
addrman.Attempt(addrConnect);
|
|
|
|
LogPrint("net", "connected %s\n", pszDest ? pszDest : addrConnect.ToString().c_str());
|
|
|
|
// Set to non-blocking
|
|
#ifdef WIN32
|
|
u_long nOne = 1;
|
|
if (ioctlsocket(hSocket, FIONBIO, &nOne) == SOCKET_ERROR)
|
|
LogPrintf("ConnectSocket() : ioctlsocket non-blocking setting failed, error %d\n", WSAGetLastError());
|
|
#else
|
|
if (fcntl(hSocket, F_SETFL, O_NONBLOCK) == SOCKET_ERROR)
|
|
LogPrintf("ConnectSocket() : fcntl non-blocking setting failed, error %d\n", errno);
|
|
#endif
|
|
|
|
// Add node
|
|
CNode* pnode = new CNode(hSocket, addrConnect, pszDest ? pszDest : "", false);
|
|
pnode->AddRef();
|
|
|
|
{
|
|
LOCK(cs_vNodes);
|
|
vNodes.push_back(pnode);
|
|
}
|
|
|
|
pnode->nTimeConnected = GetTime();
|
|
return pnode;
|
|
}
|
|
else
|
|
{
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
void CNode::CloseSocketDisconnect()
|
|
{
|
|
fDisconnect = true;
|
|
if (hSocket != INVALID_SOCKET)
|
|
{
|
|
LogPrint("net", "disconnecting node %s\n", addrName.c_str());
|
|
closesocket(hSocket);
|
|
hSocket = INVALID_SOCKET;
|
|
}
|
|
|
|
// in case this fails, we'll empty the recv buffer when the CNode is deleted
|
|
TRY_LOCK(cs_vRecvMsg, lockRecv);
|
|
if (lockRecv)
|
|
vRecvMsg.clear();
|
|
|
|
// if this was the sync node, we'll need a new one
|
|
if (this == pnodeSync)
|
|
pnodeSync = NULL;
|
|
}
|
|
|
|
void CNode::Cleanup()
|
|
{
|
|
}
|
|
|
|
|
|
void CNode::PushVersion()
|
|
{
|
|
int nBestHeight = g_signals.GetHeight().get_value_or(0);
|
|
|
|
/// when NTP implemented, change to just nTime = GetAdjustedTime()
|
|
int64_t nTime = (fInbound ? GetAdjustedTime() : GetTime());
|
|
CAddress addrYou = (addr.IsRoutable() && !IsProxy(addr) ? addr : CAddress(CService("0.0.0.0",0)));
|
|
CAddress addrMe = GetLocalAddress(&addr);
|
|
RAND_bytes((unsigned char*)&nLocalHostNonce, sizeof(nLocalHostNonce));
|
|
LogPrint("net", "send version message: version %d, blocks=%d, us=%s, them=%s, peer=%s\n", PROTOCOL_VERSION, nBestHeight, addrMe.ToString().c_str(), addrYou.ToString().c_str(), addr.ToString().c_str());
|
|
PushMessage("version", PROTOCOL_VERSION, nLocalServices, nTime, addrYou, addrMe,
|
|
nLocalHostNonce, FormatSubVersion(CLIENT_NAME, CLIENT_VERSION, std::vector<string>()), nBestHeight, true);
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
std::map<CNetAddr, int64_t> CNode::setBanned;
|
|
CCriticalSection CNode::cs_setBanned;
|
|
|
|
void CNode::ClearBanned()
|
|
{
|
|
setBanned.clear();
|
|
}
|
|
|
|
bool CNode::IsBanned(CNetAddr ip)
|
|
{
|
|
bool fResult = false;
|
|
{
|
|
LOCK(cs_setBanned);
|
|
std::map<CNetAddr, int64_t>::iterator i = setBanned.find(ip);
|
|
if (i != setBanned.end())
|
|
{
|
|
int64_t t = (*i).second;
|
|
if (GetTime() < t)
|
|
fResult = true;
|
|
}
|
|
}
|
|
return fResult;
|
|
}
|
|
|
|
bool CNode::Ban(const CNetAddr &addr) {
|
|
int64_t banTime = GetTime()+GetArg("-bantime", 60*60*24); // Default 24-hour ban
|
|
{
|
|
LOCK(cs_setBanned);
|
|
if (setBanned[addr] < banTime)
|
|
setBanned[addr] = banTime;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
#undef X
|
|
#define X(name) stats.name = name
|
|
void CNode::copyStats(CNodeStats &stats)
|
|
{
|
|
stats.nodeid = this->GetId();
|
|
X(nServices);
|
|
X(nLastSend);
|
|
X(nLastRecv);
|
|
X(nTimeConnected);
|
|
X(addrName);
|
|
X(nVersion);
|
|
X(cleanSubVer);
|
|
X(fInbound);
|
|
X(nStartingHeight);
|
|
X(nSendBytes);
|
|
X(nRecvBytes);
|
|
stats.fSyncNode = (this == pnodeSync);
|
|
|
|
// It is common for nodes with good ping times to suddenly become lagged,
|
|
// due to a new block arriving or other large transfer.
|
|
// Merely reporting pingtime might fool the caller into thinking the node was still responsive,
|
|
// since pingtime does not update until the ping is complete, which might take a while.
|
|
// So, if a ping is taking an unusually long time in flight,
|
|
// the caller can immediately detect that this is happening.
|
|
int64_t nPingUsecWait = 0;
|
|
if ((0 != nPingNonceSent) && (0 != nPingUsecStart)) {
|
|
nPingUsecWait = GetTimeMicros() - nPingUsecStart;
|
|
}
|
|
|
|
// Raw ping time is in microseconds, but show it to user as whole seconds (Bitcoin users should be well used to small numbers with many decimal places by now :)
|
|
stats.dPingTime = (((double)nPingUsecTime) / 1e6);
|
|
stats.dPingWait = (((double)nPingUsecWait) / 1e6);
|
|
|
|
// Leave string empty if addrLocal invalid (not filled in yet)
|
|
stats.addrLocal = addrLocal.IsValid() ? addrLocal.ToString() : "";
|
|
}
|
|
#undef X
|
|
|
|
// requires LOCK(cs_vRecvMsg)
|
|
bool CNode::ReceiveMsgBytes(const char *pch, unsigned int nBytes)
|
|
{
|
|
while (nBytes > 0) {
|
|
|
|
// get current incomplete message, or create a new one
|
|
if (vRecvMsg.empty() ||
|
|
vRecvMsg.back().complete())
|
|
vRecvMsg.push_back(CNetMessage(SER_NETWORK, nRecvVersion));
|
|
|
|
CNetMessage& msg = vRecvMsg.back();
|
|
|
|
// absorb network data
|
|
int handled;
|
|
if (!msg.in_data)
|
|
handled = msg.readHeader(pch, nBytes);
|
|
else
|
|
handled = msg.readData(pch, nBytes);
|
|
|
|
if (handled < 0)
|
|
return false;
|
|
|
|
pch += handled;
|
|
nBytes -= handled;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
int CNetMessage::readHeader(const char *pch, unsigned int nBytes)
|
|
{
|
|
// copy data to temporary parsing buffer
|
|
unsigned int nRemaining = 24 - nHdrPos;
|
|
unsigned int nCopy = std::min(nRemaining, nBytes);
|
|
|
|
memcpy(&hdrbuf[nHdrPos], pch, nCopy);
|
|
nHdrPos += nCopy;
|
|
|
|
// if header incomplete, exit
|
|
if (nHdrPos < 24)
|
|
return nCopy;
|
|
|
|
// deserialize to CMessageHeader
|
|
try {
|
|
hdrbuf >> hdr;
|
|
}
|
|
catch (std::exception &e) {
|
|
return -1;
|
|
}
|
|
|
|
// reject messages larger than MAX_SIZE
|
|
if (hdr.nMessageSize > MAX_SIZE)
|
|
return -1;
|
|
|
|
// switch state to reading message data
|
|
in_data = true;
|
|
vRecv.resize(hdr.nMessageSize);
|
|
|
|
return nCopy;
|
|
}
|
|
|
|
int CNetMessage::readData(const char *pch, unsigned int nBytes)
|
|
{
|
|
unsigned int nRemaining = hdr.nMessageSize - nDataPos;
|
|
unsigned int nCopy = std::min(nRemaining, nBytes);
|
|
|
|
memcpy(&vRecv[nDataPos], pch, nCopy);
|
|
nDataPos += nCopy;
|
|
|
|
return nCopy;
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
// requires LOCK(cs_vSend)
|
|
void SocketSendData(CNode *pnode)
|
|
{
|
|
std::deque<CSerializeData>::iterator it = pnode->vSendMsg.begin();
|
|
|
|
while (it != pnode->vSendMsg.end()) {
|
|
const CSerializeData &data = *it;
|
|
assert(data.size() > pnode->nSendOffset);
|
|
int nBytes = send(pnode->hSocket, &data[pnode->nSendOffset], data.size() - pnode->nSendOffset, MSG_NOSIGNAL | MSG_DONTWAIT);
|
|
if (nBytes > 0) {
|
|
pnode->nLastSend = GetTime();
|
|
pnode->nSendBytes += nBytes;
|
|
pnode->nSendOffset += nBytes;
|
|
pnode->RecordBytesSent(nBytes);
|
|
if (pnode->nSendOffset == data.size()) {
|
|
pnode->nSendOffset = 0;
|
|
pnode->nSendSize -= data.size();
|
|
it++;
|
|
} else {
|
|
// could not send full message; stop sending more
|
|
break;
|
|
}
|
|
} else {
|
|
if (nBytes < 0) {
|
|
// error
|
|
int nErr = WSAGetLastError();
|
|
if (nErr != WSAEWOULDBLOCK && nErr != WSAEMSGSIZE && nErr != WSAEINTR && nErr != WSAEINPROGRESS)
|
|
{
|
|
LogPrintf("socket send error %d\n", nErr);
|
|
pnode->CloseSocketDisconnect();
|
|
}
|
|
}
|
|
// couldn't send anything at all
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (it == pnode->vSendMsg.end()) {
|
|
assert(pnode->nSendOffset == 0);
|
|
assert(pnode->nSendSize == 0);
|
|
}
|
|
pnode->vSendMsg.erase(pnode->vSendMsg.begin(), it);
|
|
}
|
|
|
|
static list<CNode*> vNodesDisconnected;
|
|
|
|
void ThreadSocketHandler()
|
|
{
|
|
unsigned int nPrevNodeCount = 0;
|
|
while (true)
|
|
{
|
|
//
|
|
// Disconnect nodes
|
|
//
|
|
{
|
|
LOCK(cs_vNodes);
|
|
// Disconnect unused nodes
|
|
vector<CNode*> vNodesCopy = vNodes;
|
|
BOOST_FOREACH(CNode* pnode, vNodesCopy)
|
|
{
|
|
if (pnode->fDisconnect ||
|
|
(pnode->GetRefCount() <= 0 && pnode->vRecvMsg.empty() && pnode->nSendSize == 0 && pnode->ssSend.empty()))
|
|
{
|
|
// remove from vNodes
|
|
vNodes.erase(remove(vNodes.begin(), vNodes.end(), pnode), vNodes.end());
|
|
|
|
// release outbound grant (if any)
|
|
pnode->grantOutbound.Release();
|
|
|
|
// close socket and cleanup
|
|
pnode->CloseSocketDisconnect();
|
|
pnode->Cleanup();
|
|
|
|
// hold in disconnected pool until all refs are released
|
|
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_LOCK(pnode->cs_vSend, lockSend);
|
|
if (lockSend)
|
|
{
|
|
TRY_LOCK(pnode->cs_vRecvMsg, lockRecv);
|
|
if (lockRecv)
|
|
{
|
|
TRY_LOCK(pnode->cs_inventory, lockInv);
|
|
if (lockInv)
|
|
fDelete = true;
|
|
}
|
|
}
|
|
}
|
|
if (fDelete)
|
|
{
|
|
vNodesDisconnected.remove(pnode);
|
|
delete pnode;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if(vNodes.size() != nPrevNodeCount) {
|
|
nPrevNodeCount = vNodes.size();
|
|
uiInterface.NotifyNumConnectionsChanged(nPrevNodeCount);
|
|
}
|
|
|
|
|
|
//
|
|
// 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;
|
|
bool have_fds = false;
|
|
|
|
BOOST_FOREACH(SOCKET hListenSocket, vhListenSocket) {
|
|
FD_SET(hListenSocket, &fdsetRecv);
|
|
hSocketMax = max(hSocketMax, hListenSocket);
|
|
have_fds = true;
|
|
}
|
|
{
|
|
LOCK(cs_vNodes);
|
|
BOOST_FOREACH(CNode* pnode, vNodes)
|
|
{
|
|
if (pnode->hSocket == INVALID_SOCKET)
|
|
continue;
|
|
FD_SET(pnode->hSocket, &fdsetError);
|
|
hSocketMax = max(hSocketMax, pnode->hSocket);
|
|
have_fds = true;
|
|
|
|
// Implement the following logic:
|
|
// * If there is data to send, select() for sending data. As this only
|
|
// happens when optimistic write failed, we choose to first drain the
|
|
// write buffer in this case before receiving more. This avoids
|
|
// needlessly queueing received data, if the remote peer is not themselves
|
|
// receiving data. This means properly utilizing TCP flow control signalling.
|
|
// * Otherwise, if there is no (complete) message in the receive buffer,
|
|
// or there is space left in the buffer, select() for receiving data.
|
|
// * (if neither of the above applies, there is certainly one message
|
|
// in the receiver buffer ready to be processed).
|
|
// Together, that means that at least one of the following is always possible,
|
|
// so we don't deadlock:
|
|
// * We send some data.
|
|
// * We wait for data to be received (and disconnect after timeout).
|
|
// * We process a message in the buffer (message handler thread).
|
|
{
|
|
TRY_LOCK(pnode->cs_vSend, lockSend);
|
|
if (lockSend && !pnode->vSendMsg.empty()) {
|
|
FD_SET(pnode->hSocket, &fdsetSend);
|
|
continue;
|
|
}
|
|
}
|
|
{
|
|
TRY_LOCK(pnode->cs_vRecvMsg, lockRecv);
|
|
if (lockRecv && (
|
|
pnode->vRecvMsg.empty() || !pnode->vRecvMsg.front().complete() ||
|
|
pnode->GetTotalRecvSize() <= ReceiveFloodSize()))
|
|
FD_SET(pnode->hSocket, &fdsetRecv);
|
|
}
|
|
}
|
|
}
|
|
|
|
int nSelect = select(have_fds ? hSocketMax + 1 : 0,
|
|
&fdsetRecv, &fdsetSend, &fdsetError, &timeout);
|
|
boost::this_thread::interruption_point();
|
|
|
|
if (nSelect == SOCKET_ERROR)
|
|
{
|
|
if (have_fds)
|
|
{
|
|
int nErr = WSAGetLastError();
|
|
LogPrintf("socket select error %d\n", nErr);
|
|
for (unsigned int i = 0; i <= hSocketMax; i++)
|
|
FD_SET(i, &fdsetRecv);
|
|
}
|
|
FD_ZERO(&fdsetSend);
|
|
FD_ZERO(&fdsetError);
|
|
MilliSleep(timeout.tv_usec/1000);
|
|
}
|
|
|
|
|
|
//
|
|
// Accept new connections
|
|
//
|
|
BOOST_FOREACH(SOCKET hListenSocket, vhListenSocket)
|
|
if (hListenSocket != INVALID_SOCKET && FD_ISSET(hListenSocket, &fdsetRecv))
|
|
{
|
|
#ifdef USE_IPV6
|
|
struct sockaddr_storage sockaddr;
|
|
#else
|
|
struct sockaddr sockaddr;
|
|
#endif
|
|
socklen_t len = sizeof(sockaddr);
|
|
SOCKET hSocket = accept(hListenSocket, (struct sockaddr*)&sockaddr, &len);
|
|
CAddress addr;
|
|
int nInbound = 0;
|
|
|
|
if (hSocket != INVALID_SOCKET)
|
|
if (!addr.SetSockAddr((const struct sockaddr*)&sockaddr))
|
|
LogPrintf("Warning: Unknown socket family\n");
|
|
|
|
{
|
|
LOCK(cs_vNodes);
|
|
BOOST_FOREACH(CNode* pnode, vNodes)
|
|
if (pnode->fInbound)
|
|
nInbound++;
|
|
}
|
|
|
|
if (hSocket == INVALID_SOCKET)
|
|
{
|
|
int nErr = WSAGetLastError();
|
|
if (nErr != WSAEWOULDBLOCK)
|
|
LogPrintf("socket error accept failed: %d\n", nErr);
|
|
}
|
|
else if (nInbound >= nMaxConnections - MAX_OUTBOUND_CONNECTIONS)
|
|
{
|
|
{
|
|
LOCK(cs_setservAddNodeAddresses);
|
|
if (!setservAddNodeAddresses.count(addr))
|
|
closesocket(hSocket);
|
|
}
|
|
}
|
|
else if (CNode::IsBanned(addr))
|
|
{
|
|
LogPrintf("connection from %s dropped (banned)\n", addr.ToString().c_str());
|
|
closesocket(hSocket);
|
|
}
|
|
else
|
|
{
|
|
LogPrint("net", "accepted connection %s\n", addr.ToString().c_str());
|
|
CNode* pnode = new CNode(hSocket, addr, "", true);
|
|
pnode->AddRef();
|
|
{
|
|
LOCK(cs_vNodes);
|
|
vNodes.push_back(pnode);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
//
|
|
// Service each socket
|
|
//
|
|
vector<CNode*> vNodesCopy;
|
|
{
|
|
LOCK(cs_vNodes);
|
|
vNodesCopy = vNodes;
|
|
BOOST_FOREACH(CNode* pnode, vNodesCopy)
|
|
pnode->AddRef();
|
|
}
|
|
BOOST_FOREACH(CNode* pnode, vNodesCopy)
|
|
{
|
|
boost::this_thread::interruption_point();
|
|
|
|
//
|
|
// Receive
|
|
//
|
|
if (pnode->hSocket == INVALID_SOCKET)
|
|
continue;
|
|
if (FD_ISSET(pnode->hSocket, &fdsetRecv) || FD_ISSET(pnode->hSocket, &fdsetError))
|
|
{
|
|
TRY_LOCK(pnode->cs_vRecvMsg, lockRecv);
|
|
if (lockRecv)
|
|
{
|
|
{
|
|
// typical socket buffer is 8K-64K
|
|
char pchBuf[0x10000];
|
|
int nBytes = recv(pnode->hSocket, pchBuf, sizeof(pchBuf), MSG_DONTWAIT);
|
|
if (nBytes > 0)
|
|
{
|
|
if (!pnode->ReceiveMsgBytes(pchBuf, nBytes))
|
|
pnode->CloseSocketDisconnect();
|
|
pnode->nLastRecv = GetTime();
|
|
pnode->nRecvBytes += nBytes;
|
|
pnode->RecordBytesRecv(nBytes);
|
|
}
|
|
else if (nBytes == 0)
|
|
{
|
|
// socket closed gracefully
|
|
if (!pnode->fDisconnect)
|
|
LogPrint("net", "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)
|
|
LogPrintf("socket recv error %d\n", nErr);
|
|
pnode->CloseSocketDisconnect();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
//
|
|
// Send
|
|
//
|
|
if (pnode->hSocket == INVALID_SOCKET)
|
|
continue;
|
|
if (FD_ISSET(pnode->hSocket, &fdsetSend))
|
|
{
|
|
TRY_LOCK(pnode->cs_vSend, lockSend);
|
|
if (lockSend)
|
|
SocketSendData(pnode);
|
|
}
|
|
|
|
//
|
|
// Inactivity checking
|
|
//
|
|
if (pnode->vSendMsg.empty())
|
|
pnode->nLastSendEmpty = GetTime();
|
|
if (GetTime() - pnode->nTimeConnected > 60)
|
|
{
|
|
if (pnode->nLastRecv == 0 || pnode->nLastSend == 0)
|
|
{
|
|
LogPrint("net", "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)
|
|
{
|
|
LogPrintf("socket not sending\n");
|
|
pnode->fDisconnect = true;
|
|
}
|
|
else if (GetTime() - pnode->nLastRecv > 90*60)
|
|
{
|
|
LogPrintf("socket inactivity timeout\n");
|
|
pnode->fDisconnect = true;
|
|
}
|
|
}
|
|
}
|
|
{
|
|
LOCK(cs_vNodes);
|
|
BOOST_FOREACH(CNode* pnode, vNodesCopy)
|
|
pnode->Release();
|
|
}
|
|
|
|
MilliSleep(10);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
#ifdef USE_UPNP
|
|
void ThreadMapPort()
|
|
{
|
|
std::string port = strprintf("%u", GetListenPort());
|
|
const char * multicastif = 0;
|
|
const char * minissdpdpath = 0;
|
|
struct UPNPDev * devlist = 0;
|
|
char lanaddr[64];
|
|
|
|
#ifndef UPNPDISCOVER_SUCCESS
|
|
/* miniupnpc 1.5 */
|
|
devlist = upnpDiscover(2000, multicastif, minissdpdpath, 0);
|
|
#else
|
|
/* miniupnpc 1.6 */
|
|
int error = 0;
|
|
devlist = upnpDiscover(2000, multicastif, minissdpdpath, 0, 0, &error);
|
|
#endif
|
|
|
|
struct UPNPUrls urls;
|
|
struct IGDdatas data;
|
|
int r;
|
|
|
|
r = UPNP_GetValidIGD(devlist, &urls, &data, lanaddr, sizeof(lanaddr));
|
|
if (r == 1)
|
|
{
|
|
if (fDiscover) {
|
|
char externalIPAddress[40];
|
|
r = UPNP_GetExternalIPAddress(urls.controlURL, data.first.servicetype, externalIPAddress);
|
|
if(r != UPNPCOMMAND_SUCCESS)
|
|
LogPrintf("UPnP: GetExternalIPAddress() returned %d\n", r);
|
|
else
|
|
{
|
|
if(externalIPAddress[0])
|
|
{
|
|
LogPrintf("UPnP: ExternalIPAddress = %s\n", externalIPAddress);
|
|
AddLocal(CNetAddr(externalIPAddress), LOCAL_UPNP);
|
|
}
|
|
else
|
|
LogPrintf("UPnP: GetExternalIPAddress failed.\n");
|
|
}
|
|
}
|
|
|
|
string strDesc = "Bitcoin " + FormatFullVersion();
|
|
|
|
try {
|
|
while (true) {
|
|
#ifndef UPNPDISCOVER_SUCCESS
|
|
/* miniupnpc 1.5 */
|
|
r = UPNP_AddPortMapping(urls.controlURL, data.first.servicetype,
|
|
port.c_str(), port.c_str(), lanaddr, strDesc.c_str(), "TCP", 0);
|
|
#else
|
|
/* miniupnpc 1.6 */
|
|
r = UPNP_AddPortMapping(urls.controlURL, data.first.servicetype,
|
|
port.c_str(), port.c_str(), lanaddr, strDesc.c_str(), "TCP", 0, "0");
|
|
#endif
|
|
|
|
if(r!=UPNPCOMMAND_SUCCESS)
|
|
LogPrintf("AddPortMapping(%s, %s, %s) failed with code %d (%s)\n",
|
|
port.c_str(), port.c_str(), lanaddr, r, strupnperror(r));
|
|
else
|
|
LogPrintf("UPnP Port Mapping successful.\n");;
|
|
|
|
MilliSleep(20*60*1000); // Refresh every 20 minutes
|
|
}
|
|
}
|
|
catch (boost::thread_interrupted)
|
|
{
|
|
r = UPNP_DeletePortMapping(urls.controlURL, data.first.servicetype, port.c_str(), "TCP", 0);
|
|
LogPrintf("UPNP_DeletePortMapping() returned : %d\n", r);
|
|
freeUPNPDevlist(devlist); devlist = 0;
|
|
FreeUPNPUrls(&urls);
|
|
throw;
|
|
}
|
|
} else {
|
|
LogPrintf("No valid UPnP IGDs found\n");
|
|
freeUPNPDevlist(devlist); devlist = 0;
|
|
if (r != 0)
|
|
FreeUPNPUrls(&urls);
|
|
}
|
|
}
|
|
|
|
void MapPort(bool fUseUPnP)
|
|
{
|
|
static boost::thread* upnp_thread = NULL;
|
|
|
|
if (fUseUPnP)
|
|
{
|
|
if (upnp_thread) {
|
|
upnp_thread->interrupt();
|
|
upnp_thread->join();
|
|
delete upnp_thread;
|
|
}
|
|
upnp_thread = new boost::thread(boost::bind(&TraceThread<void (*)()>, "upnp", &ThreadMapPort));
|
|
}
|
|
else if (upnp_thread) {
|
|
upnp_thread->interrupt();
|
|
upnp_thread->join();
|
|
delete upnp_thread;
|
|
upnp_thread = NULL;
|
|
}
|
|
}
|
|
|
|
#else
|
|
void MapPort(bool)
|
|
{
|
|
// Intentionally left blank.
|
|
}
|
|
#endif
|
|
|
|
|
|
|
|
|
|
|
|
|
|
void ThreadDNSAddressSeed()
|
|
{
|
|
const vector<CDNSSeedData> &vSeeds = Params().DNSSeeds();
|
|
int found = 0;
|
|
|
|
LogPrintf("Loading addresses from DNS seeds (could take a while)\n");
|
|
|
|
BOOST_FOREACH(const CDNSSeedData &seed, vSeeds) {
|
|
if (HaveNameProxy()) {
|
|
AddOneShot(seed.host);
|
|
} else {
|
|
vector<CNetAddr> vIPs;
|
|
vector<CAddress> vAdd;
|
|
if (LookupHost(seed.host.c_str(), vIPs))
|
|
{
|
|
BOOST_FOREACH(CNetAddr& ip, vIPs)
|
|
{
|
|
int nOneDay = 24*3600;
|
|
CAddress addr = CAddress(CService(ip, Params().GetDefaultPort()));
|
|
addr.nTime = GetTime() - 3*nOneDay - GetRand(4*nOneDay); // use a random age between 3 and 7 days old
|
|
vAdd.push_back(addr);
|
|
found++;
|
|
}
|
|
}
|
|
addrman.Add(vAdd, CNetAddr(seed.name, true));
|
|
}
|
|
}
|
|
|
|
LogPrintf("%d addresses found from DNS seeds\n", found);
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
void DumpAddresses()
|
|
{
|
|
int64_t nStart = GetTimeMillis();
|
|
|
|
CAddrDB adb;
|
|
adb.Write(addrman);
|
|
|
|
LogPrint("net", "Flushed %d addresses to peers.dat %"PRId64"ms\n",
|
|
addrman.size(), GetTimeMillis() - nStart);
|
|
}
|
|
|
|
void static ProcessOneShot()
|
|
{
|
|
string strDest;
|
|
{
|
|
LOCK(cs_vOneShots);
|
|
if (vOneShots.empty())
|
|
return;
|
|
strDest = vOneShots.front();
|
|
vOneShots.pop_front();
|
|
}
|
|
CAddress addr;
|
|
CSemaphoreGrant grant(*semOutbound, true);
|
|
if (grant) {
|
|
if (!OpenNetworkConnection(addr, &grant, strDest.c_str(), true))
|
|
AddOneShot(strDest);
|
|
}
|
|
}
|
|
|
|
void ThreadOpenConnections()
|
|
{
|
|
// Connect to specific addresses
|
|
if (mapArgs.count("-connect") && mapMultiArgs["-connect"].size() > 0)
|
|
{
|
|
for (int64_t nLoop = 0;; nLoop++)
|
|
{
|
|
ProcessOneShot();
|
|
BOOST_FOREACH(string strAddr, mapMultiArgs["-connect"])
|
|
{
|
|
CAddress addr;
|
|
OpenNetworkConnection(addr, NULL, strAddr.c_str());
|
|
for (int i = 0; i < 10 && i < nLoop; i++)
|
|
{
|
|
MilliSleep(500);
|
|
}
|
|
}
|
|
MilliSleep(500);
|
|
}
|
|
}
|
|
|
|
// Initiate network connections
|
|
int64_t nStart = GetTime();
|
|
while (true)
|
|
{
|
|
ProcessOneShot();
|
|
|
|
MilliSleep(500);
|
|
|
|
CSemaphoreGrant grant(*semOutbound);
|
|
boost::this_thread::interruption_point();
|
|
|
|
// Add seed nodes if DNS seeds are all down (an infrastructure attack?).
|
|
if (addrman.size() == 0 && (GetTime() - nStart > 60)) {
|
|
static bool done = false;
|
|
if (!done) {
|
|
LogPrintf("Adding fixed seed nodes as DNS doesn't seem to be available.\n");
|
|
addrman.Add(Params().FixedSeeds(), CNetAddr("127.0.0.1"));
|
|
done = true;
|
|
}
|
|
}
|
|
|
|
//
|
|
// Choose an address to connect to based on most recently seen
|
|
//
|
|
CAddress addrConnect;
|
|
|
|
// Only connect out to one peer per network group (/16 for IPv4).
|
|
// Do this here so we don't have to critsect vNodes inside mapAddresses critsect.
|
|
int nOutbound = 0;
|
|
set<vector<unsigned char> > setConnected;
|
|
{
|
|
LOCK(cs_vNodes);
|
|
BOOST_FOREACH(CNode* pnode, vNodes) {
|
|
if (!pnode->fInbound) {
|
|
setConnected.insert(pnode->addr.GetGroup());
|
|
nOutbound++;
|
|
}
|
|
}
|
|
}
|
|
|
|
int64_t nANow = GetAdjustedTime();
|
|
|
|
int nTries = 0;
|
|
while (true)
|
|
{
|
|
// use an nUnkBias between 10 (no outgoing connections) and 90 (8 outgoing connections)
|
|
CAddress addr = addrman.Select(10 + min(nOutbound,8)*10);
|
|
|
|
// if we selected an invalid address, restart
|
|
if (!addr.IsValid() || setConnected.count(addr.GetGroup()) || IsLocal(addr))
|
|
break;
|
|
|
|
// If we didn't find an appropriate destination after trying 100 addresses fetched from addrman,
|
|
// stop this loop, and let the outer loop run again (which sleeps, adds seed nodes, recalculates
|
|
// already-connected network ranges, ...) before trying new addrman addresses.
|
|
nTries++;
|
|
if (nTries > 100)
|
|
break;
|
|
|
|
if (IsLimited(addr))
|
|
continue;
|
|
|
|
// 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() != Params().GetDefaultPort() && nTries < 50)
|
|
continue;
|
|
|
|
addrConnect = addr;
|
|
break;
|
|
}
|
|
|
|
if (addrConnect.IsValid())
|
|
OpenNetworkConnection(addrConnect, &grant);
|
|
}
|
|
}
|
|
|
|
void ThreadOpenAddedConnections()
|
|
{
|
|
{
|
|
LOCK(cs_vAddedNodes);
|
|
vAddedNodes = mapMultiArgs["-addnode"];
|
|
}
|
|
|
|
if (HaveNameProxy()) {
|
|
while(true) {
|
|
list<string> lAddresses(0);
|
|
{
|
|
LOCK(cs_vAddedNodes);
|
|
BOOST_FOREACH(string& strAddNode, vAddedNodes)
|
|
lAddresses.push_back(strAddNode);
|
|
}
|
|
BOOST_FOREACH(string& strAddNode, lAddresses) {
|
|
CAddress addr;
|
|
CSemaphoreGrant grant(*semOutbound);
|
|
OpenNetworkConnection(addr, &grant, strAddNode.c_str());
|
|
MilliSleep(500);
|
|
}
|
|
MilliSleep(120000); // Retry every 2 minutes
|
|
}
|
|
}
|
|
|
|
for (unsigned int i = 0; true; i++)
|
|
{
|
|
list<string> lAddresses(0);
|
|
{
|
|
LOCK(cs_vAddedNodes);
|
|
BOOST_FOREACH(string& strAddNode, vAddedNodes)
|
|
lAddresses.push_back(strAddNode);
|
|
}
|
|
|
|
list<vector<CService> > lservAddressesToAdd(0);
|
|
BOOST_FOREACH(string& strAddNode, lAddresses)
|
|
{
|
|
vector<CService> vservNode(0);
|
|
if(Lookup(strAddNode.c_str(), vservNode, Params().GetDefaultPort(), fNameLookup, 0))
|
|
{
|
|
lservAddressesToAdd.push_back(vservNode);
|
|
{
|
|
LOCK(cs_setservAddNodeAddresses);
|
|
BOOST_FOREACH(CService& serv, vservNode)
|
|
setservAddNodeAddresses.insert(serv);
|
|
}
|
|
}
|
|
}
|
|
// Attempt to connect to each IP for each addnode entry until at least one is successful per addnode entry
|
|
// (keeping in mind that addnode entries can have many IPs if fNameLookup)
|
|
{
|
|
LOCK(cs_vNodes);
|
|
BOOST_FOREACH(CNode* pnode, vNodes)
|
|
for (list<vector<CService> >::iterator it = lservAddressesToAdd.begin(); it != lservAddressesToAdd.end(); it++)
|
|
BOOST_FOREACH(CService& addrNode, *(it))
|
|
if (pnode->addr == addrNode)
|
|
{
|
|
it = lservAddressesToAdd.erase(it);
|
|
it--;
|
|
break;
|
|
}
|
|
}
|
|
BOOST_FOREACH(vector<CService>& vserv, lservAddressesToAdd)
|
|
{
|
|
CSemaphoreGrant grant(*semOutbound);
|
|
OpenNetworkConnection(CAddress(vserv[i % vserv.size()]), &grant);
|
|
MilliSleep(500);
|
|
}
|
|
MilliSleep(120000); // Retry every 2 minutes
|
|
}
|
|
}
|
|
|
|
// if successful, this moves the passed grant to the constructed node
|
|
bool OpenNetworkConnection(const CAddress& addrConnect, CSemaphoreGrant *grantOutbound, const char *strDest, bool fOneShot)
|
|
{
|
|
//
|
|
// Initiate outbound network connection
|
|
//
|
|
boost::this_thread::interruption_point();
|
|
if (!strDest)
|
|
if (IsLocal(addrConnect) ||
|
|
FindNode((CNetAddr)addrConnect) || CNode::IsBanned(addrConnect) ||
|
|
FindNode(addrConnect.ToStringIPPort().c_str()))
|
|
return false;
|
|
if (strDest && FindNode(strDest))
|
|
return false;
|
|
|
|
CNode* pnode = ConnectNode(addrConnect, strDest);
|
|
boost::this_thread::interruption_point();
|
|
|
|
if (!pnode)
|
|
return false;
|
|
if (grantOutbound)
|
|
grantOutbound->MoveTo(pnode->grantOutbound);
|
|
pnode->fNetworkNode = true;
|
|
if (fOneShot)
|
|
pnode->fOneShot = true;
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
// for now, use a very simple selection metric: the node from which we received
|
|
// most recently
|
|
double static NodeSyncScore(const CNode *pnode) {
|
|
return -pnode->nLastRecv;
|
|
}
|
|
|
|
void static StartSync(const vector<CNode*> &vNodes) {
|
|
CNode *pnodeNewSync = NULL;
|
|
double dBestScore = 0;
|
|
|
|
int nBestHeight = g_signals.GetHeight().get_value_or(0);
|
|
|
|
// Iterate over all nodes
|
|
BOOST_FOREACH(CNode* pnode, vNodes) {
|
|
// check preconditions for allowing a sync
|
|
if (!pnode->fClient && !pnode->fOneShot &&
|
|
!pnode->fDisconnect && pnode->fSuccessfullyConnected &&
|
|
(pnode->nStartingHeight > (nBestHeight - 144)) &&
|
|
(pnode->nVersion < NOBLKS_VERSION_START || pnode->nVersion >= NOBLKS_VERSION_END)) {
|
|
// if ok, compare node's score with the best so far
|
|
double dScore = NodeSyncScore(pnode);
|
|
if (pnodeNewSync == NULL || dScore > dBestScore) {
|
|
pnodeNewSync = pnode;
|
|
dBestScore = dScore;
|
|
}
|
|
}
|
|
}
|
|
// if a new sync candidate was found, start sync!
|
|
if (pnodeNewSync) {
|
|
pnodeNewSync->fStartSync = true;
|
|
pnodeSync = pnodeNewSync;
|
|
}
|
|
}
|
|
|
|
void ThreadMessageHandler()
|
|
{
|
|
SetThreadPriority(THREAD_PRIORITY_BELOW_NORMAL);
|
|
while (true)
|
|
{
|
|
bool fHaveSyncNode = false;
|
|
|
|
vector<CNode*> vNodesCopy;
|
|
{
|
|
LOCK(cs_vNodes);
|
|
vNodesCopy = vNodes;
|
|
BOOST_FOREACH(CNode* pnode, vNodesCopy) {
|
|
pnode->AddRef();
|
|
if (pnode == pnodeSync)
|
|
fHaveSyncNode = true;
|
|
}
|
|
}
|
|
|
|
if (!fHaveSyncNode)
|
|
StartSync(vNodesCopy);
|
|
|
|
// Poll the connected nodes for messages
|
|
CNode* pnodeTrickle = NULL;
|
|
if (!vNodesCopy.empty())
|
|
pnodeTrickle = vNodesCopy[GetRand(vNodesCopy.size())];
|
|
|
|
bool fSleep = true;
|
|
|
|
BOOST_FOREACH(CNode* pnode, vNodesCopy)
|
|
{
|
|
if (pnode->fDisconnect)
|
|
continue;
|
|
|
|
// Receive messages
|
|
{
|
|
TRY_LOCK(pnode->cs_vRecvMsg, lockRecv);
|
|
if (lockRecv)
|
|
{
|
|
if (!g_signals.ProcessMessages(pnode))
|
|
pnode->CloseSocketDisconnect();
|
|
|
|
if (pnode->nSendSize < SendBufferSize())
|
|
{
|
|
if (!pnode->vRecvGetData.empty() || (!pnode->vRecvMsg.empty() && pnode->vRecvMsg[0].complete()))
|
|
{
|
|
fSleep = false;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
boost::this_thread::interruption_point();
|
|
|
|
// Send messages
|
|
{
|
|
TRY_LOCK(pnode->cs_vSend, lockSend);
|
|
if (lockSend)
|
|
g_signals.SendMessages(pnode, pnode == pnodeTrickle);
|
|
}
|
|
boost::this_thread::interruption_point();
|
|
}
|
|
|
|
{
|
|
LOCK(cs_vNodes);
|
|
BOOST_FOREACH(CNode* pnode, vNodesCopy)
|
|
pnode->Release();
|
|
}
|
|
|
|
if (fSleep)
|
|
MilliSleep(100);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
bool BindListenPort(const CService &addrBind, string& strError)
|
|
{
|
|
strError = "";
|
|
int nOne = 1;
|
|
|
|
// Create socket for listening for incoming connections
|
|
#ifdef USE_IPV6
|
|
struct sockaddr_storage sockaddr;
|
|
#else
|
|
struct sockaddr sockaddr;
|
|
#endif
|
|
socklen_t len = sizeof(sockaddr);
|
|
if (!addrBind.GetSockAddr((struct sockaddr*)&sockaddr, &len))
|
|
{
|
|
strError = strprintf("Error: bind address family for %s not supported", addrBind.ToString().c_str());
|
|
LogPrintf("%s\n", strError.c_str());
|
|
return false;
|
|
}
|
|
|
|
SOCKET hListenSocket = socket(((struct sockaddr*)&sockaddr)->sa_family, SOCK_STREAM, IPPROTO_TCP);
|
|
if (hListenSocket == INVALID_SOCKET)
|
|
{
|
|
strError = strprintf("Error: Couldn't open socket for incoming connections (socket returned error %d)", WSAGetLastError());
|
|
LogPrintf("%s\n", strError.c_str());
|
|
return false;
|
|
}
|
|
|
|
#ifdef SO_NOSIGPIPE
|
|
// Different way of disabling SIGPIPE on BSD
|
|
setsockopt(hListenSocket, SOL_SOCKET, SO_NOSIGPIPE, (void*)&nOne, sizeof(int));
|
|
#endif
|
|
|
|
#ifndef WIN32
|
|
// 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 WIN32
|
|
// Set to non-blocking, 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());
|
|
LogPrintf("%s\n", strError.c_str());
|
|
return false;
|
|
}
|
|
|
|
#ifdef USE_IPV6
|
|
// some systems don't have IPV6_V6ONLY but are always v6only; others do have the option
|
|
// and enable it by default or not. Try to enable it, if possible.
|
|
if (addrBind.IsIPv6()) {
|
|
#ifdef IPV6_V6ONLY
|
|
#ifdef WIN32
|
|
setsockopt(hListenSocket, IPPROTO_IPV6, IPV6_V6ONLY, (const char*)&nOne, sizeof(int));
|
|
#else
|
|
setsockopt(hListenSocket, IPPROTO_IPV6, IPV6_V6ONLY, (void*)&nOne, sizeof(int));
|
|
#endif
|
|
#endif
|
|
#ifdef WIN32
|
|
int nProtLevel = 10 /* PROTECTION_LEVEL_UNRESTRICTED */;
|
|
int nParameterId = 23 /* IPV6_PROTECTION_LEVEl */;
|
|
// this call is allowed to fail
|
|
setsockopt(hListenSocket, IPPROTO_IPV6, nParameterId, (const char*)&nProtLevel, sizeof(int));
|
|
#endif
|
|
}
|
|
#endif
|
|
|
|
if (::bind(hListenSocket, (struct sockaddr*)&sockaddr, len) == SOCKET_ERROR)
|
|
{
|
|
int nErr = WSAGetLastError();
|
|
if (nErr == WSAEADDRINUSE)
|
|
strError = strprintf(_("Unable to bind to %s on this computer. Bitcoin is probably already running."), addrBind.ToString().c_str());
|
|
else
|
|
strError = strprintf(_("Unable to bind to %s on this computer (bind returned error %d, %s)"), addrBind.ToString().c_str(), nErr, strerror(nErr));
|
|
LogPrintf("%s\n", strError.c_str());
|
|
return false;
|
|
}
|
|
LogPrintf("Bound to %s\n", addrBind.ToString().c_str());
|
|
|
|
// Listen for incoming connections
|
|
if (listen(hListenSocket, SOMAXCONN) == SOCKET_ERROR)
|
|
{
|
|
strError = strprintf("Error: Listening for incoming connections failed (listen returned error %d)", WSAGetLastError());
|
|
LogPrintf("%s\n", strError.c_str());
|
|
return false;
|
|
}
|
|
|
|
vhListenSocket.push_back(hListenSocket);
|
|
|
|
if (addrBind.IsRoutable() && fDiscover)
|
|
AddLocal(addrBind, LOCAL_BIND);
|
|
|
|
return true;
|
|
}
|
|
|
|
void static Discover(boost::thread_group& threadGroup)
|
|
{
|
|
if (!fDiscover)
|
|
return;
|
|
|
|
#ifdef WIN32
|
|
// Get local host IP
|
|
char pszHostName[1000] = "";
|
|
if (gethostname(pszHostName, sizeof(pszHostName)) != SOCKET_ERROR)
|
|
{
|
|
vector<CNetAddr> vaddr;
|
|
if (LookupHost(pszHostName, vaddr))
|
|
{
|
|
BOOST_FOREACH (const CNetAddr &addr, vaddr)
|
|
{
|
|
AddLocal(addr, LOCAL_IF);
|
|
}
|
|
}
|
|
}
|
|
#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;
|
|
if (ifa->ifa_addr->sa_family == AF_INET)
|
|
{
|
|
struct sockaddr_in* s4 = (struct sockaddr_in*)(ifa->ifa_addr);
|
|
CNetAddr addr(s4->sin_addr);
|
|
if (AddLocal(addr, LOCAL_IF))
|
|
LogPrintf("IPv4 %s: %s\n", ifa->ifa_name, addr.ToString().c_str());
|
|
}
|
|
#ifdef USE_IPV6
|
|
else if (ifa->ifa_addr->sa_family == AF_INET6)
|
|
{
|
|
struct sockaddr_in6* s6 = (struct sockaddr_in6*)(ifa->ifa_addr);
|
|
CNetAddr addr(s6->sin6_addr);
|
|
if (AddLocal(addr, LOCAL_IF))
|
|
LogPrintf("IPv6 %s: %s\n", ifa->ifa_name, addr.ToString().c_str());
|
|
}
|
|
#endif
|
|
}
|
|
freeifaddrs(myaddrs);
|
|
}
|
|
#endif
|
|
|
|
// Don't use external IPv4 discovery, when -onlynet="IPv6"
|
|
if (!IsLimited(NET_IPV4))
|
|
threadGroup.create_thread(boost::bind(&TraceThread<void (*)()>, "ext-ip", &ThreadGetMyExternalIP));
|
|
}
|
|
|
|
void StartNode(boost::thread_group& threadGroup)
|
|
{
|
|
if (semOutbound == NULL) {
|
|
// initialize semaphore
|
|
int nMaxOutbound = min(MAX_OUTBOUND_CONNECTIONS, nMaxConnections);
|
|
semOutbound = new CSemaphore(nMaxOutbound);
|
|
}
|
|
|
|
if (pnodeLocalHost == NULL)
|
|
pnodeLocalHost = new CNode(INVALID_SOCKET, CAddress(CService("127.0.0.1", 0), nLocalServices));
|
|
|
|
Discover(threadGroup);
|
|
|
|
//
|
|
// Start threads
|
|
//
|
|
|
|
if (!GetBoolArg("-dnsseed", true))
|
|
LogPrintf("DNS seeding disabled\n");
|
|
else
|
|
threadGroup.create_thread(boost::bind(&TraceThread<void (*)()>, "dnsseed", &ThreadDNSAddressSeed));
|
|
|
|
#ifdef USE_UPNP
|
|
// Map ports with UPnP
|
|
MapPort(GetBoolArg("-upnp", USE_UPNP));
|
|
#endif
|
|
|
|
// Send and receive from sockets, accept connections
|
|
threadGroup.create_thread(boost::bind(&TraceThread<void (*)()>, "net", &ThreadSocketHandler));
|
|
|
|
// Initiate outbound connections from -addnode
|
|
threadGroup.create_thread(boost::bind(&TraceThread<void (*)()>, "addcon", &ThreadOpenAddedConnections));
|
|
|
|
// Initiate outbound connections
|
|
threadGroup.create_thread(boost::bind(&TraceThread<void (*)()>, "opencon", &ThreadOpenConnections));
|
|
|
|
// Process messages
|
|
threadGroup.create_thread(boost::bind(&TraceThread<void (*)()>, "msghand", &ThreadMessageHandler));
|
|
|
|
// Dump network addresses
|
|
threadGroup.create_thread(boost::bind(&LoopForever<void (*)()>, "dumpaddr", &DumpAddresses, DUMP_ADDRESSES_INTERVAL * 1000));
|
|
}
|
|
|
|
bool StopNode()
|
|
{
|
|
LogPrintf("StopNode()\n");
|
|
MapPort(false);
|
|
if (semOutbound)
|
|
for (int i=0; i<MAX_OUTBOUND_CONNECTIONS; i++)
|
|
semOutbound->post();
|
|
MilliSleep(50);
|
|
DumpAddresses();
|
|
|
|
return true;
|
|
}
|
|
|
|
class CNetCleanup
|
|
{
|
|
public:
|
|
CNetCleanup()
|
|
{
|
|
}
|
|
~CNetCleanup()
|
|
{
|
|
// Close sockets
|
|
BOOST_FOREACH(CNode* pnode, vNodes)
|
|
if (pnode->hSocket != INVALID_SOCKET)
|
|
closesocket(pnode->hSocket);
|
|
BOOST_FOREACH(SOCKET hListenSocket, vhListenSocket)
|
|
if (hListenSocket != INVALID_SOCKET)
|
|
if (closesocket(hListenSocket) == SOCKET_ERROR)
|
|
LogPrintf("closesocket(hListenSocket) failed with error %d\n", WSAGetLastError());
|
|
|
|
// clean up some globals (to help leak detection)
|
|
BOOST_FOREACH(CNode *pnode, vNodes)
|
|
delete pnode;
|
|
BOOST_FOREACH(CNode *pnode, vNodesDisconnected)
|
|
delete pnode;
|
|
vNodes.clear();
|
|
vNodesDisconnected.clear();
|
|
delete semOutbound;
|
|
semOutbound = NULL;
|
|
delete pnodeLocalHost;
|
|
pnodeLocalHost = NULL;
|
|
|
|
#ifdef WIN32
|
|
// Shutdown Windows Sockets
|
|
WSACleanup();
|
|
#endif
|
|
}
|
|
}
|
|
instance_of_cnetcleanup;
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
void RelayTransaction(const CTransaction& tx, const uint256& hash)
|
|
{
|
|
CDataStream ss(SER_NETWORK, PROTOCOL_VERSION);
|
|
ss.reserve(10000);
|
|
ss << tx;
|
|
RelayTransaction(tx, hash, ss);
|
|
}
|
|
|
|
void RelayTransaction(const CTransaction& tx, const uint256& hash, const CDataStream& ss)
|
|
{
|
|
CInv inv(MSG_TX, hash);
|
|
{
|
|
LOCK(cs_mapRelay);
|
|
// Expire old relay messages
|
|
while (!vRelayExpiration.empty() && vRelayExpiration.front().first < GetTime())
|
|
{
|
|
mapRelay.erase(vRelayExpiration.front().second);
|
|
vRelayExpiration.pop_front();
|
|
}
|
|
|
|
// Save original serialized message so newer versions are preserved
|
|
mapRelay.insert(std::make_pair(inv, ss));
|
|
vRelayExpiration.push_back(std::make_pair(GetTime() + 15 * 60, inv));
|
|
}
|
|
LOCK(cs_vNodes);
|
|
BOOST_FOREACH(CNode* pnode, vNodes)
|
|
{
|
|
if(!pnode->fRelayTxes)
|
|
continue;
|
|
LOCK(pnode->cs_filter);
|
|
if (pnode->pfilter)
|
|
{
|
|
if (pnode->pfilter->IsRelevantAndUpdate(tx, hash))
|
|
pnode->PushInventory(inv);
|
|
} else
|
|
pnode->PushInventory(inv);
|
|
}
|
|
}
|
|
|
|
void CNode::RecordBytesRecv(uint64_t bytes)
|
|
{
|
|
LOCK(cs_totalBytesRecv);
|
|
nTotalBytesRecv += bytes;
|
|
}
|
|
|
|
void CNode::RecordBytesSent(uint64_t bytes)
|
|
{
|
|
LOCK(cs_totalBytesSent);
|
|
nTotalBytesSent += bytes;
|
|
}
|
|
|
|
uint64_t CNode::GetTotalBytesRecv()
|
|
{
|
|
LOCK(cs_totalBytesRecv);
|
|
return nTotalBytesRecv;
|
|
}
|
|
|
|
uint64_t CNode::GetTotalBytesSent()
|
|
{
|
|
LOCK(cs_totalBytesSent);
|
|
return nTotalBytesSent;
|
|
}
|
|
|
|
void CNode::Fuzz(int nChance)
|
|
{
|
|
if (!fSuccessfullyConnected) return; // Don't fuzz initial handshake
|
|
if (GetRand(nChance) != 0) return; // Fuzz 1 of every nChance messages
|
|
|
|
switch (GetRand(3))
|
|
{
|
|
case 0:
|
|
// xor a random byte with a random value:
|
|
if (!ssSend.empty()) {
|
|
CDataStream::size_type pos = GetRand(ssSend.size());
|
|
ssSend[pos] ^= (unsigned char)(GetRand(256));
|
|
}
|
|
break;
|
|
case 1:
|
|
// delete a random byte:
|
|
if (!ssSend.empty()) {
|
|
CDataStream::size_type pos = GetRand(ssSend.size());
|
|
ssSend.erase(ssSend.begin()+pos);
|
|
}
|
|
break;
|
|
case 2:
|
|
// insert a random byte at a random position
|
|
{
|
|
CDataStream::size_type pos = GetRand(ssSend.size());
|
|
char ch = (char)GetRand(256);
|
|
ssSend.insert(ssSend.begin()+pos, ch);
|
|
}
|
|
break;
|
|
}
|
|
// Chance of more than one change half the time:
|
|
// (more changes exponentially less likely):
|
|
Fuzz(2);
|
|
}
|
|
|
|
//
|
|
// CAddrDB
|
|
//
|
|
|
|
CAddrDB::CAddrDB()
|
|
{
|
|
pathAddr = GetDataDir() / "peers.dat";
|
|
}
|
|
|
|
bool CAddrDB::Write(const CAddrMan& addr)
|
|
{
|
|
// Generate random temporary filename
|
|
unsigned short randv = 0;
|
|
RAND_bytes((unsigned char *)&randv, sizeof(randv));
|
|
std::string tmpfn = strprintf("peers.dat.%04x", randv);
|
|
|
|
// serialize addresses, checksum data up to that point, then append csum
|
|
CDataStream ssPeers(SER_DISK, CLIENT_VERSION);
|
|
ssPeers << FLATDATA(Params().MessageStart());
|
|
ssPeers << addr;
|
|
uint256 hash = Hash(ssPeers.begin(), ssPeers.end());
|
|
ssPeers << hash;
|
|
|
|
// open temp output file, and associate with CAutoFile
|
|
boost::filesystem::path pathTmp = GetDataDir() / tmpfn;
|
|
FILE *file = fopen(pathTmp.string().c_str(), "wb");
|
|
CAutoFile fileout = CAutoFile(file, SER_DISK, CLIENT_VERSION);
|
|
if (!fileout)
|
|
return error("CAddrman::Write() : open failed");
|
|
|
|
// Write and commit header, data
|
|
try {
|
|
fileout << ssPeers;
|
|
}
|
|
catch (std::exception &e) {
|
|
return error("CAddrman::Write() : I/O error");
|
|
}
|
|
FileCommit(fileout);
|
|
fileout.fclose();
|
|
|
|
// replace existing peers.dat, if any, with new peers.dat.XXXX
|
|
if (!RenameOver(pathTmp, pathAddr))
|
|
return error("CAddrman::Write() : Rename-into-place failed");
|
|
|
|
return true;
|
|
}
|
|
|
|
bool CAddrDB::Read(CAddrMan& addr)
|
|
{
|
|
// open input file, and associate with CAutoFile
|
|
FILE *file = fopen(pathAddr.string().c_str(), "rb");
|
|
CAutoFile filein = CAutoFile(file, SER_DISK, CLIENT_VERSION);
|
|
if (!filein)
|
|
return error("CAddrman::Read() : open failed");
|
|
|
|
// use file size to size memory buffer
|
|
int fileSize = GetFilesize(filein);
|
|
int dataSize = fileSize - sizeof(uint256);
|
|
//Don't try to resize to a negative number if file is small
|
|
if ( dataSize < 0 ) dataSize = 0;
|
|
vector<unsigned char> vchData;
|
|
vchData.resize(dataSize);
|
|
uint256 hashIn;
|
|
|
|
// read data and checksum from file
|
|
try {
|
|
filein.read((char *)&vchData[0], dataSize);
|
|
filein >> hashIn;
|
|
}
|
|
catch (std::exception &e) {
|
|
return error("CAddrman::Read() 2 : I/O error or stream data corrupted");
|
|
}
|
|
filein.fclose();
|
|
|
|
CDataStream ssPeers(vchData, SER_DISK, CLIENT_VERSION);
|
|
|
|
// verify stored checksum matches input data
|
|
uint256 hashTmp = Hash(ssPeers.begin(), ssPeers.end());
|
|
if (hashIn != hashTmp)
|
|
return error("CAddrman::Read() : checksum mismatch; data corrupted");
|
|
|
|
unsigned char pchMsgTmp[4];
|
|
try {
|
|
// de-serialize file header (network specific magic number) and ..
|
|
ssPeers >> FLATDATA(pchMsgTmp);
|
|
|
|
// ... verify the network matches ours
|
|
if (memcmp(pchMsgTmp, Params().MessageStart(), sizeof(pchMsgTmp)))
|
|
return error("CAddrman::Read() : invalid network magic number");
|
|
|
|
// de-serialize address data into one CAddrMan object
|
|
ssPeers >> addr;
|
|
}
|
|
catch (std::exception &e) {
|
|
return error("CAddrman::Read() : I/O error or stream data corrupted");
|
|
}
|
|
|
|
return true;
|
|
}
|