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Merge pull request #5161

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845c86d Do not use third party services for IP detection. (Gregory Maxwell)
This commit is contained in:
Wladimir J. van der Laan 2014-11-12 18:12:33 +01:00
commit 0c7862e968
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GPG key ID: 74810B012346C9A6
4 changed files with 61 additions and 148 deletions
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3
src/init.cpp
View file

@ -574,6 +574,9 @@ bool AppInit2(boost::thread_group& threadGroup)
// to protect privacy, do not listen by default if a default proxy server is specified
if (SoftSetBoolArg("-listen", false))
LogPrintf("AppInit2 : parameter interaction: -proxy set -> setting -listen=0\n");
// to protect privacy, do not discover addresses by default
if (SoftSetBoolArg("-discover", false))
LogPrintf("AppInit2 : parameter interaction: -proxy set -> setting -discover=0\n");
}
if (!GetBoolArg("-listen", true)) {

41
src/main.cpp
View file

@ -3478,12 +3478,6 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
else
pfrom->fRelayTxes = true;
if (pfrom->fInbound && addrMe.IsRoutable())
{
pfrom->addrLocal = addrMe;
SeenLocal(addrMe);
}
// Disconnect if we connected to ourself
if (nNonce == nLocalHostNonce && nNonce > 1)
{
@ -3492,6 +3486,12 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
return true;
}
pfrom->addrLocal = addrMe;
if (pfrom->fInbound && addrMe.IsRoutable())
{
SeenLocal(addrMe);
}
// Be shy and don't send version until we hear
if (pfrom->fInbound)
pfrom->PushVersion();
@ -3512,7 +3512,12 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
{
CAddress addr = GetLocalAddress(&pfrom->addr);
if (addr.IsRoutable())
{
pfrom->PushAddress(addr);
} else if (IsPeerAddrLocalGood(pfrom)) {
addr.SetIP(pfrom->addrLocal);
pfrom->PushAddress(addr);
}
}
// Get recent addresses
@ -4375,24 +4380,18 @@ bool SendMessages(CNode* pto, bool fSendTrickle)
static int64_t nLastRebroadcast;
if (!IsInitialBlockDownload() && (GetTime() - nLastRebroadcast > 24 * 60 * 60))
{
LOCK(cs_vNodes);
BOOST_FOREACH(CNode* pnode, vNodes)
{
LOCK(cs_vNodes);
BOOST_FOREACH(CNode* pnode, vNodes)
{
// Periodically clear setAddrKnown to allow refresh broadcasts
if (nLastRebroadcast)
pnode->setAddrKnown.clear();
// Periodically clear setAddrKnown to allow refresh broadcasts
if (nLastRebroadcast)
pnode->setAddrKnown.clear();
// Rebroadcast our address
if (fListen)
{
CAddress addr = GetLocalAddress(&pnode->addr);
if (addr.IsRoutable())
pnode->PushAddress(addr);
}
}
// Rebroadcast our address
AdvertizeLocal(pnode);
}
nLastRebroadcast = GetTime();
if (!vNodes.empty())
nLastRebroadcast = GetTime();
}
//

161
src/net.cpp
View file

@ -142,16 +142,19 @@ bool GetLocal(CService& addr, const CNetAddr *paddrPeer)
}
// get best local address for a particular peer as a CAddress
// Otherwise, return the unroutable 0.0.0.0 but filled in with
// the normal parameters, since the IP may be changed to a useful
// one by discovery.
CAddress GetLocalAddress(const CNetAddr *paddrPeer)
{
CAddress ret(CService("0.0.0.0",0),0);
CAddress ret(CService("0.0.0.0",GetListenPort()),0);
CService addr;
if (GetLocal(addr, paddrPeer))
{
ret = CAddress(addr);
ret.nServices = nLocalServices;
ret.nTime = GetAdjustedTime();
}
ret.nServices = nLocalServices;
ret.nTime = GetAdjustedTime();
return ret;
}
@ -205,21 +208,38 @@ bool RecvLine(SOCKET hSocket, string& strLine)
}
}
// used when scores of local addresses may have changed
// pushes better local address to peers
void static AdvertizeLocal()
int GetnScore(const CService& addr)
{
LOCK(cs_vNodes);
BOOST_FOREACH(CNode* pnode, vNodes)
LOCK(cs_mapLocalHost);
if (mapLocalHost.count(addr) == LOCAL_NONE)
return 0;
return mapLocalHost[addr].nScore;
}
// Is our peer's addrLocal potentially useful as an external IP source?
bool IsPeerAddrLocalGood(CNode *pnode)
{
return fDiscover && pnode->addr.IsRoutable() && pnode->addrLocal.IsRoutable() &&
!IsLimited(pnode->addrLocal.GetNetwork());
}
// pushes our own address to a peer
void AdvertizeLocal(CNode *pnode)
{
if (fListen && pnode->fSuccessfullyConnected)
{
if (pnode->fSuccessfullyConnected)
CAddress addrLocal = GetLocalAddress(&pnode->addr);
// If discovery is enabled, sometimes give our peer the address it
// tells us that it sees us as in case it has a better idea of our
// address than we do.
if (IsPeerAddrLocalGood(pnode) && (!addrLocal.IsRoutable() ||
GetRand((GetnScore(addrLocal) > LOCAL_MANUAL) ? 8:2) == 0))
{
CAddress addrLocal = GetLocalAddress(&pnode->addr);
if (addrLocal.IsRoutable() && (CService)addrLocal != (CService)pnode->addrLocal)
{
pnode->PushAddress(addrLocal);
pnode->addrLocal = addrLocal;
}
addrLocal.SetIP(pnode->addrLocal);
}
if (addrLocal.IsRoutable())
{
pnode->PushAddress(addrLocal);
}
}
}
@ -257,8 +277,6 @@ bool AddLocal(const CService& addr, int nScore)
SetReachable(addr.GetNetwork());
}
AdvertizeLocal();
return true;
}
@ -296,12 +314,10 @@ bool SeenLocal(const CService& addr)
return false;
mapLocalHost[addr].nScore++;
}
AdvertizeLocal();
return true;
}
/** check whether a given address is potentially local */
bool IsLocal(const CService& addr)
{
@ -323,114 +339,12 @@ bool IsReachable(const CNetAddr& addr)
return IsReachable(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());
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, addr.ToString());
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 <= 1; 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:";
}
if (GetMyExternalIP2(addrConnect, pszGet, pszKeyword, ipRet))
return true;
}
return false;
}
void ThreadGetMyExternalIP()
{
CNetAddr addrLocalHost;
if (GetMyExternalIP(addrLocalHost))
{
LogPrintf("GetMyExternalIP() returned %s\n", addrLocalHost.ToStringIP());
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;
@ -1687,9 +1601,6 @@ void static Discover(boost::thread_group& threadGroup)
}
#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)

4
src/net.h
View file

@ -60,7 +60,6 @@ unsigned int SendBufferSize();
void AddOneShot(std::string strDest);
bool RecvLine(SOCKET hSocket, std::string& strLine);
bool GetMyExternalIP(CNetAddr& ipRet);
void AddressCurrentlyConnected(const CService& addr);
CNode* FindNode(const CNetAddr& ip);
CNode* FindNode(const std::string& addrName);
@ -96,12 +95,13 @@ enum
LOCAL_IF, // address a local interface listens on
LOCAL_BIND, // address explicit bound to
LOCAL_UPNP, // address reported by UPnP
LOCAL_HTTP, // address reported by whatismyip.com and similar
LOCAL_MANUAL, // address explicitly specified (-externalip=)
LOCAL_MAX
};
bool IsPeerAddrLocalGood(CNode *pnode);
void AdvertizeLocal(CNode *pnode);
void SetLimited(enum Network net, bool fLimited = true);
bool IsLimited(enum Network net);
bool IsLimited(const CNetAddr& addr);