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Support connecting by hostnames passed to proxy (-proxydns)

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This commit is contained in:
Pieter Wuille 2012-04-19 17:38:03 +02:00
parent a012e2db59
commit 9bab521df8
5 changed files with 145 additions and 69 deletions
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21
src/init.cpp
View file

@ -181,6 +181,7 @@ bool AppInit2(int argc, char* argv[])
" -proxy=<ip:port> \t " + _("Connect through socks proxy") + "\n" +
" -socks=<n> \t " + _("Select the version of socks proxy to use (4 or 5, 5 is default)") + "\n" +
" -dns \t " + _("Allow DNS lookups for addnode and connect") + "\n" +
" -proxydns \t " + _("Pass DNS requests to (SOCKS5) proxy") + "\n" +
" -port=<port> \t\t " + _("Listen for connections on <port> (default: 8333 or testnet: 18333)") + "\n" +
" -maxconnections=<n>\t " + _("Maintain at most <n> connections to peers (default: 125)") + "\n" +
" -addnode=<ip> \t " + _("Add a node to connect to and attempt to keep the connection open") + "\n" +
@ -524,13 +525,16 @@ bool AppInit2(int argc, char* argv[])
// Note: the GetBoolArg() calls for all of these must happen later.
SoftSetBoolArg("-listen", false);
SoftSetBoolArg("-irc", false);
SoftSetBoolArg("-dnsseed", false);
SoftSetBoolArg("-proxydns", true);
SoftSetBoolArg("-upnp", false);
SoftSetBoolArg("-dns", false);
}
fAllowDNS = GetBoolArg("-dns");
fNameLookup = GetBoolArg("-dns");
fProxyNameLookup = GetBoolArg("-proxydns");
if (fProxyNameLookup)
fNameLookup = true;
fNoListen = !GetBoolArg("-listen", true);
nSocksVersion = GetArg("-socks", 5);
// Continue to put "/P2SH/" in the coinbase to monitor
// BIP16 support.
@ -548,17 +552,6 @@ bool AppInit2(int argc, char* argv[])
}
}
if (mapArgs.count("-addnode"))
{
BOOST_FOREACH(string strAddr, mapMultiArgs["-addnode"])
{
CAddress addr(CService(strAddr, GetDefaultPort(), fAllowDNS));
addr.nTime = 0; // so it won't relay unless successfully connected
if (addr.IsValid())
addrman.Add(addr, CNetAddr("127.0.0.1"));
}
}
if (mapArgs.count("-paytxfee"))
{
if (!ParseMoney(mapArgs["-paytxfee"], nTransactionFee))

124
src/net.cpp
View file

@ -35,7 +35,7 @@ void ThreadOpenAddedConnections2(void* parg);
void ThreadMapPort2(void* parg);
#endif
void ThreadDNSAddressSeed2(void* parg);
bool OpenNetworkConnection(const CAddress& addrConnect);
bool OpenNetworkConnection(const CAddress& addrConnect, const char *strDest = NULL);
@ -43,7 +43,6 @@ bool OpenNetworkConnection(const CAddress& addrConnect);
// Global state variables
//
bool fClient = false;
bool fAllowDNS = false;
static bool fUseUPnP = false;
uint64 nLocalServices = (fClient ? 0 : NODE_NETWORK);
CAddress addrLocalHost(CService("0.0.0.0", 0), nLocalServices);
@ -307,6 +306,15 @@ CNode* FindNode(const CNetAddr& ip)
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)
{
{
@ -318,35 +326,38 @@ CNode* FindNode(const CService& addr)
return NULL;
}
CNode* ConnectNode(CAddress addrConnect, int64 nTimeout)
CNode* ConnectNode(CAddress addrConnect, const char *pszDest, int64 nTimeout)
{
if ((CNetAddr)addrConnect == (CNetAddr)addrLocalHost)
return NULL;
if (pszDest != NULL) {
if ((CNetAddr)addrConnect == (CNetAddr)addrLocalHost)
return NULL;
// Look for an existing connection
CNode* pnode = FindNode((CService)addrConnect);
if (pnode)
{
if (nTimeout != 0)
pnode->AddRef(nTimeout);
else
pnode->AddRef();
return pnode;
// Look for an existing connection
CNode* pnode = FindNode((CService)addrConnect);
if (pnode)
{
if (nTimeout != 0)
pnode->AddRef(nTimeout);
else
pnode->AddRef();
return pnode;
}
}
/// debug print
printf("trying connection %s lastseen=%.1fhrs\n",
addrConnect.ToString().c_str(),
(double)(addrConnect.nTime - GetAdjustedTime())/3600.0);
addrman.Attempt(addrConnect);
pszDest ? pszDest : addrConnect.ToString().c_str(),
pszDest ? 0 : (double)(addrConnect.nTime - GetAdjustedTime())/3600.0);
// Connect
SOCKET hSocket;
if (ConnectSocket(addrConnect, hSocket))
if (pszDest ? ConnectSocketByName(addrConnect, hSocket, pszDest, GetDefaultPort()) : ConnectSocket(addrConnect, hSocket))
{
addrman.Attempt(addrConnect);
/// debug print
printf("connected %s\n", addrConnect.ToString().c_str());
printf("connected %s\n", pszDest ? pszDest : addrConnect.ToString().c_str());
// Set to nonblocking
#ifdef WIN32
@ -359,11 +370,12 @@ CNode* ConnectNode(CAddress addrConnect, int64 nTimeout)
#endif
// Add node
CNode* pnode = new CNode(hSocket, addrConnect, false);
CNode* pnode = new CNode(hSocket, addrConnect, pszDest ? pszDest : "", false);
if (nTimeout != 0)
pnode->AddRef(nTimeout);
else
pnode->AddRef();
{
LOCK(cs_vNodes);
vNodes.push_back(pnode);
@ -389,7 +401,7 @@ void CNode::CloseSocketDisconnect()
{
if (fDebug)
printf("%s ", DateTimeStrFormat("%x %H:%M:%S", GetTime()).c_str());
printf("disconnecting node %s\n", addr.ToString().c_str());
printf("disconnecting node %s\n", addrName.c_str());
closesocket(hSocket);
hSocket = INVALID_SOCKET;
vRecv.clear();
@ -444,7 +456,7 @@ bool CNode::Misbehaving(int howmuch)
{
if (addr.IsLocal())
{
printf("Warning: local node %s misbehaving\n", addr.ToString().c_str());
printf("Warning: local node %s misbehaving\n", addrName.c_str());
return false;
}
@ -458,7 +470,7 @@ bool CNode::Misbehaving(int howmuch)
setBanned[addr] = banTime;
}
CloseSocketDisconnect();
printf("Disconnected %s for misbehavior (score=%d)\n", addr.ToString().c_str(), nMisbehavior);
printf("Disconnected %s for misbehavior (score=%d)\n", addrName.c_str(), nMisbehavior);
return true;
}
return false;
@ -675,7 +687,7 @@ void ThreadSocketHandler2(void* parg)
else
{
printf("accepted connection %s\n", addr.ToString().c_str());
CNode* pnode = new CNode(hSocket, addr, true);
CNode* pnode = new CNode(hSocket, addr, "", true);
pnode->AddRef();
{
LOCK(cs_vNodes);
@ -1025,20 +1037,25 @@ void ThreadDNSAddressSeed2(void* parg)
printf("Loading addresses from DNS seeds (could take a while)\n");
for (unsigned int seed_idx = 0; seed_idx < ARRAYLEN(strDNSSeed); seed_idx++) {
vector<CNetAddr> vaddr;
vector<CAddress> vAdd;
if (LookupHost(strDNSSeed[seed_idx][1], vaddr))
{
BOOST_FOREACH(CNetAddr& ip, vaddr)
if (fProxyNameLookup) {
CAddress addr;
OpenNetworkConnection(addr, strDNSSeed[seed_idx][1]);
} else {
vector<CNetAddr> vaddr;
vector<CAddress> vAdd;
if (LookupHost(strDNSSeed[seed_idx][1], vaddr))
{
int nOneDay = 24*3600;
CAddress addr = CAddress(CService(ip, GetDefaultPort()));
addr.nTime = GetTime() - 3*nOneDay - GetRand(4*nOneDay); // use a random age between 3 and 7 days old
vAdd.push_back(addr);
found++;
BOOST_FOREACH(CNetAddr& ip, vaddr)
{
int nOneDay = 24*3600;
CAddress addr = CAddress(CService(ip, 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(strDNSSeed[seed_idx][0], true));
}
addrman.Add(vAdd, CNetAddr(strDNSSeed[seed_idx][0], true));
}
}
@ -1199,9 +1216,8 @@ void ThreadOpenConnections2(void* parg)
{
BOOST_FOREACH(string strAddr, mapMultiArgs["-connect"])
{
CAddress addr(CService(strAddr, GetDefaultPort(), fAllowDNS));
if (addr.IsValid())
OpenNetworkConnection(addr);
CAddress addr(CService("0.0.0.0:0"));
OpenNetworkConnection(addr, strAddr.c_str());
for (int i = 0; i < 10 && i < nLoop; i++)
{
Sleep(500);
@ -1325,11 +1341,25 @@ void ThreadOpenAddedConnections2(void* parg)
if (mapArgs.count("-addnode") == 0)
return;
if (fProxyNameLookup) {
while(!fShutdown) {
BOOST_FOREACH(string& strAddNode, mapMultiArgs["-addnode"]) {
CAddress addr;
OpenNetworkConnection(addr, strAddNode.c_str());
Sleep(500);
}
vnThreadsRunning[THREAD_ADDEDCONNECTIONS]--;
Sleep(120000); // Retry every 2 minutes
vnThreadsRunning[THREAD_ADDEDCONNECTIONS]++;
}
return;
}
vector<vector<CService> > vservAddressesToAdd(0);
BOOST_FOREACH(string& strAddNode, mapMultiArgs["-addnode"])
{
vector<CService> vservNode(0);
if(Lookup(strAddNode.c_str(), vservNode, GetDefaultPort(), fAllowDNS, 0))
if(Lookup(strAddNode.c_str(), vservNode, GetDefaultPort(), fNameLookup, 0))
{
vservAddressesToAdd.push_back(vservNode);
{
@ -1343,7 +1373,7 @@ void ThreadOpenAddedConnections2(void* parg)
{
vector<vector<CService> > vservConnectAddresses = vservAddressesToAdd;
// 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 fAllowDNS)
// (keeping in mind that addnode entries can have many IPs if fNameLookup)
{
LOCK(cs_vNodes);
BOOST_FOREACH(CNode* pnode, vNodes)
@ -1373,19 +1403,23 @@ void ThreadOpenAddedConnections2(void* parg)
}
}
bool OpenNetworkConnection(const CAddress& addrConnect)
bool OpenNetworkConnection(const CAddress& addrConnect, const char *strDest)
{
//
// Initiate outbound network connection
//
if (fShutdown)
return false;
if ((CNetAddr)addrConnect == (CNetAddr)addrLocalHost || !addrConnect.IsIPv4() ||
FindNode((CNetAddr)addrConnect) || CNode::IsBanned(addrConnect))
if (!strDest)
if ((CNetAddr)addrConnect == (CNetAddr)addrLocalHost || !addrConnect.IsIPv4() ||
FindNode((CNetAddr)addrConnect) || CNode::IsBanned(addrConnect) ||
FindNode(addrConnect.ToStringIPPort().c_str()))
return false;
if (strDest && FindNode(strDest))
return false;
vnThreadsRunning[THREAD_OPENCONNECTIONS]--;
CNode* pnode = ConnectNode(addrConnect);
CNode* pnode = ConnectNode(addrConnect, strDest);
vnThreadsRunning[THREAD_OPENCONNECTIONS]++;
if (fShutdown)
return false;

7
src/net.h
View file

@ -35,7 +35,7 @@ bool GetMyExternalIP(CNetAddr& ipRet);
void AddressCurrentlyConnected(const CService& addr);
CNode* FindNode(const CNetAddr& ip);
CNode* FindNode(const CService& ip);
CNode* ConnectNode(CAddress addrConnect, int64 nTimeout=0);
CNode* ConnectNode(CAddress addrConnect, const char *strDest = NULL, int64 nTimeout=0);
void MapPort(bool fMapPort);
bool BindListenPort(std::string& strError=REF(std::string()));
void StartNode(void* parg);
@ -83,7 +83,6 @@ enum threadId
};
extern bool fClient;
extern bool fAllowDNS;
extern uint64 nLocalServices;
extern CAddress addrLocalHost;
extern uint64 nLocalHostNonce;
@ -120,6 +119,7 @@ public:
int nHeaderStart;
unsigned int nMessageStart;
CAddress addr;
std::string addrName;
int nVersion;
std::string strSubVer;
bool fClient;
@ -157,7 +157,7 @@ public:
CCriticalSection cs_inventory;
std::multimap<int64, CInv> mapAskFor;
CNode(SOCKET hSocketIn, CAddress addrIn, bool fInboundIn=false) : vSend(SER_NETWORK, MIN_PROTO_VERSION), vRecv(SER_NETWORK, MIN_PROTO_VERSION)
CNode(SOCKET hSocketIn, CAddress addrIn, std::string addrNameIn = "", bool fInboundIn=false) : vSend(SER_NETWORK, MIN_PROTO_VERSION), vRecv(SER_NETWORK, MIN_PROTO_VERSION)
{
nServices = 0;
hSocket = hSocketIn;
@ -168,6 +168,7 @@ public:
nHeaderStart = -1;
nMessageStart = -1;
addr = addrIn;
addrName = addrNameIn == "" ? addr.ToStringIPPort() : addrNameIn;
nVersion = 0;
strSubVer = "";
fClient = false; // set by version message

58
src/netbase.cpp
View file

@ -15,7 +15,10 @@
using namespace std;
// Settings
int nSocksVersion = 5;
int fUseProxy = false;
bool fProxyNameLookup = false;
bool fNameLookup = false;
CService addrProxy("127.0.0.1",9050);
int nConnectTimeout = 5000;
@ -310,12 +313,12 @@ bool static ConnectSocketDirectly(const CService &addrConnect, SOCKET& hSocketRe
setsockopt(hSocket, SOL_SOCKET, SO_NOSIGPIPE, (void*)&set, sizeof(int));
#endif
bool fProxy = (fUseProxy && addrDest.IsRoutable());
struct sockaddr_in sockaddr;
if (fProxy)
addrProxy.GetSockAddr(&sockaddr);
else
addrDest.GetSockAddr(&sockaddr);
if (!addrConnect.GetSockAddr(&sockaddr))
{
closesocket(hSocket);
return false;
}
#ifdef WIN32
u_long fNonblock = 1;
@ -329,7 +332,6 @@ bool static ConnectSocketDirectly(const CService &addrConnect, SOCKET& hSocketRe
return false;
}
if (connect(hSocket, (struct sockaddr*)&sockaddr, sizeof(sockaddr)) == SOCKET_ERROR)
{
// WSAEINVAL is here because some legacy version of winsock uses it
@ -414,7 +416,7 @@ bool ConnectSocket(const CService &addrDest, SOCKET& hSocketRet, int nTimeout)
if (fProxy)
{
switch(GetArg("-socks", 5))
switch(nSocksVersion)
{
case 4:
if (!Socks4(addrDest, hSocket))
@ -433,6 +435,48 @@ bool ConnectSocket(const CService &addrDest, SOCKET& hSocketRet, int nTimeout)
return true;
}
bool ConnectSocketByName(CService &addr, SOCKET& hSocketRet, const char *pszDest, int portDefault, int nTimeout)
{
string strDest(pszDest);
int port = portDefault;
size_t colon = strDest.find_last_of(':');
char *endp = NULL;
int n = strtol(pszDest + colon + 1, &endp, 10);
if (endp && *endp == 0 && n >= 0) {
strDest = strDest.substr(0, colon);
if (n > 0 && n < 0x10000)
port = n;
}
if (strDest[0] == '[' && strDest[strDest.size()-1] == ']')
strDest = strDest.substr(1, strDest.size()-2);
SOCKET hSocket = INVALID_SOCKET;
CService addrResolved(CNetAddr(strDest, fNameLookup && !fProxyNameLookup), port);
if (addrResolved.IsValid()) {
addr = addrResolved;
return ConnectSocket(addr, hSocketRet, nTimeout);
}
addr = CService("0.0.0.0:0");
if (!fNameLookup)
return false;
if (!ConnectSocketDirectly(addrProxy, hSocket, nTimeout))
return false;
switch(nSocksVersion)
{
case 4: return false;
case 5:
default:
if (!Socks5(strDest, port, hSocket))
return false;
break;
}
hSocketRet = hSocket;
return true;
}
void CNetAddr::Init()
{
memset(ip, 0, 16);

4
src/netbase.h
View file

@ -119,9 +119,13 @@ bool Lookup(const char *pszName, CService& addr, int portDefault = 0, bool fAllo
bool Lookup(const char *pszName, std::vector<CService>& vAddr, int portDefault = 0, bool fAllowLookup = true, unsigned int nMaxSolutions = 0);
bool LookupNumeric(const char *pszName, CService& addr, int portDefault = 0);
bool ConnectSocket(const CService &addr, SOCKET& hSocketRet, int nTimeout = nConnectTimeout);
bool ConnectSocketByName(CService &addr, SOCKET& hSocketRet, const char *pszDest, int portDefault = 0, int nTimeout = nConnectTimeout);
// Settings
extern int nSocksVersion;
extern int fUseProxy;
extern bool fProxyNameLookup;
extern bool fNameLookup;
extern CService addrProxy;
#endif