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Support for multiple local addresses

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This commit is contained in:
Pieter Wuille
2012-02-12 13:45:24 +01:00
parent 478b01d9a7
commit 39857190de
8 changed files with 187 additions and 88 deletions
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189
src/net.cpp
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@@ -45,7 +45,8 @@ bool OpenNetworkConnection(const CAddress& addrConnect, const char *strDest = NU
bool fClient = false;
static bool fUseUPnP = false;
uint64 nLocalServices = (fClient ? 0 : NODE_NETWORK);
CAddress addrLocalHost(CService("0.0.0.0", 0), nLocalServices);
CCriticalSection cs_mapLocalHost;
map<CNetAddr, int> mapLocalHost;
static CNode* pnodeLocalHost = NULL;
uint64 nLocalHostNonce = 0;
array<int, THREAD_MAX> vnThreadsRunning;
@@ -92,7 +93,45 @@ void CNode::PushGetBlocks(CBlockIndex* pindexBegin, uint256 hashEnd)
PushMessage("getblocks", CBlockLocator(pindexBegin), hashEnd);
}
// find 'best' local address for a particular peer
bool GetLocal(CNetAddr& addr, const CNetAddr *paddrPeer)
{
if (fUseProxy || mapArgs.count("-connect") || fNoListen)
return false;
int nBestCount = -1;
int nBestReachability = -1;
{
LOCK(cs_mapLocalHost);
for (map<CNetAddr, int>::iterator it = mapLocalHost.begin(); it != mapLocalHost.end(); it++)
{
int nCount = (*it).second;
int nReachability = (*it).first.GetReachabilityFrom(paddrPeer);
if (nReachability > nBestReachability || (nReachability == nBestReachability && nCount > nBestCount))
{
addr = (*it).first;
nBestReachability = nReachability;
nBestCount = nCount;
}
}
}
return nBestCount >= 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);
CNetAddr addr;
if (GetLocal(addr, paddrPeer))
{
ret.SetIP(addr);
ret.SetPort(GetListenPort());
ret.nServices = nLocalServices;
ret.nTime = GetAdjustedTime();
}
return ret;
}
bool RecvLine(SOCKET hSocket, string& strLine)
{
@@ -145,6 +184,64 @@ bool RecvLine(SOCKET hSocket, string& strLine)
}
}
// 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() && (CNetAddr)addrLocal != (CNetAddr)pnode->addrLocal)
{
pnode->PushAddress(addrLocal);
pnode->addrLocal = addrLocal;
}
}
}
}
// learn a new local address
bool AddLocal(const CNetAddr& addr, int nScore)
{
if (!addr.IsRoutable())
return false;
printf("AddLocal(%s,%i)\n", addr.ToString().c_str(), nScore);
{
LOCK(cs_mapLocalHost);
mapLocalHost[addr] = std::max(nScore, mapLocalHost[addr]) + (mapLocalHost.count(addr) ? 1 : 0);
}
AdvertizeLocal();
return true;
}
// vote for a local address
bool SeenLocal(const CNetAddr& addr)
{
{
LOCK(cs_mapLocalHost);
if (mapLocalHost.count(addr) == 0)
return false;
mapLocalHost[addr]++;
}
AdvertizeLocal();
return true;
}
// check whether a given address is potentially local
bool IsLocal(const CNetAddr& addr)
{
LOCK(cs_mapLocalHost);
return mapLocalHost.count(addr) > 0;
}
bool GetMyExternalIP2(const CService& addrConnect, const char* pszGet, const char* pszKeyword, CNetAddr& ipRet)
@@ -258,33 +355,11 @@ bool GetMyExternalIP(CNetAddr& ipRet)
void ThreadGetMyExternalIP(void* parg)
{
// Wait for IRC to get it first
if (GetBoolArg("-irc", false))
{
for (int i = 0; i < 2 * 60; i++)
{
Sleep(1000);
if (fGotExternalIP || fShutdown)
return;
}
}
// Fallback in case IRC fails to get it
CNetAddr addrLocalHost;
if (GetMyExternalIP(addrLocalHost))
{
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();
{
LOCK(cs_vNodes);
BOOST_FOREACH(CNode* pnode, vNodes)
pnode->PushAddress(addr);
}
}
AddLocal(addrLocalHost, LOCAL_HTTP);
}
}
@@ -337,7 +412,7 @@ CNode* FindNode(const CService& addr)
CNode* ConnectNode(CAddress addrConnect, const char *pszDest, int64 nTimeout)
{
if (pszDest == NULL) {
if ((CNetAddr)addrConnect == (CNetAddr)addrLocalHost)
if (IsLocal(addrConnect))
return NULL;
// Look for an existing connection
@@ -426,7 +501,7 @@ void CNode::PushVersion()
/// when NTP implemented, change to just nTime = GetAdjustedTime()
int64 nTime = (fInbound ? GetAdjustedTime() : GetTime());
CAddress addrYou = (fUseProxy ? CAddress(CService("0.0.0.0",0)) : addr);
CAddress addrMe = (fUseProxy || !addrLocalHost.IsRoutable() ? CAddress(CService("0.0.0.0",0)) : addrLocalHost);
CAddress addrMe = GetLocalAddress(&addr);
RAND_bytes((unsigned char*)&nLocalHostNonce, sizeof(nLocalHostNonce));
PushMessage("version", PROTOCOL_VERSION, nLocalServices, nTime, addrYou, addrMe,
nLocalHostNonce, FormatSubVersion(CLIENT_NAME, CLIENT_VERSION, std::vector<string>()), nBestHeight);
@@ -898,24 +973,19 @@ void ThreadMapPort2(void* parg)
r = UPNP_GetValidIGD(devlist, &urls, &data, lanaddr, sizeof(lanaddr));
if (r == 1)
{
if (!addrLocalHost.IsRoutable())
char externalIPAddress[40];
r = UPNP_GetExternalIPAddress(urls.controlURL, data.first.servicetype, externalIPAddress);
if(r != UPNPCOMMAND_SUCCESS)
printf("UPnP: GetExternalIPAddress() returned %d\n", r);
else
{
char externalIPAddress[40];
r = UPNP_GetExternalIPAddress(urls.controlURL, data.first.servicetype, externalIPAddress);
if(r != UPNPCOMMAND_SUCCESS)
printf("UPnP: GetExternalIPAddress() returned %d\n", r);
else
if(externalIPAddress[0])
{
if(externalIPAddress[0])
{
printf("UPnP: ExternalIPAddress = %s\n", externalIPAddress);
CAddress addrExternalFromUPnP(CService(externalIPAddress, 0), nLocalServices);
if (addrExternalFromUPnP.IsRoutable())
addrLocalHost = addrExternalFromUPnP;
}
else
printf("UPnP: GetExternalIPAddress failed.\n");
printf("UPnP: ExternalIPAddress = %s\n", externalIPAddress);
AddLocal(CNetAddr(externalIPAddress), LOCAL_UPNP);
}
else
printf("UPnP: GetExternalIPAddress failed.\n");
}
string strDesc = "Bitcoin " + FormatFullVersion();
@@ -1318,7 +1388,7 @@ void ThreadOpenConnections2(void* parg)
CAddress addr = addrman.Select(10 + min(nOutbound,8)*10);
// if we selected an invalid address, restart
if (!addr.IsIPv4() || !addr.IsValid() || setConnected.count(addr.GetGroup()) || addr == addrLocalHost)
if (!addr.IsIPv4() || !addr.IsValid() || setConnected.count(addr.GetGroup()) || IsLocal(addr))
break;
nTries++;
@@ -1436,8 +1506,8 @@ bool OpenNetworkConnection(const CAddress& addrConnect, const char *strDest, boo
if (fShutdown)
return false;
if (!strDest)
if ((CNetAddr)addrConnect == (CNetAddr)addrLocalHost || !addrConnect.IsIPv4() ||
FindNode((CNetAddr)addrConnect) || CNode::IsBanned(addrConnect) ||
if (IsLocal(addrConnect) ||
FindNode((CNetAddr)addrConnect) || CNode::IsBanned(addrConnect) ||
FindNode(addrConnect.ToStringIPPort().c_str()))
return false;
if (strDest && FindNode(strDest))
@@ -1550,7 +1620,6 @@ bool BindListenPort(string& strError)
{
strError = "";
int nOne = 1;
addrLocalHost.SetPort(GetListenPort());
#ifdef WIN32
// Initialize Windows Sockets
@@ -1649,11 +1718,7 @@ void StartNode(void* parg)
{
BOOST_FOREACH (const CNetAddr &addr, vaddr)
{
if (!addr.IsLocal())
{
addrLocalHost.SetIP(addr);
break;
}
AddLocal(addr, LOCAL_IF);
}
}
}
@@ -1676,32 +1741,26 @@ void StartNode(void* parg)
printf("ipv4 %s: %s\n", ifa->ifa_name, pszIP);
// Take the first IP that isn't loopback 127.x.x.x
CAddress addr(CService(s4->sin_addr, GetListenPort()), nLocalServices);
if (addr.IsValid() && !addr.IsLocal())
{
addrLocalHost = addr;
break;
}
CNetAddr addr(s4->sin_addr);
AddLocal(addr, LOCAL_IF);
}
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);
#ifdef USE_IPV6
CNetAddr addr(s6->sin6_addr);
AddLocal(addr, LOCAL_IF);
#endif
}
}
freeifaddrs(myaddrs);
}
#endif
printf("addrLocalHost = %s\n", addrLocalHost.ToString().c_str());
if (fUseProxy || mapArgs.count("-connect") || fNoListen)
{
// Proxies can't take incoming connections
addrLocalHost.SetIP(CNetAddr("0.0.0.0"));
printf("addrLocalHost = %s\n", addrLocalHost.ToString().c_str());
}
else
if (!fUseProxy && !mapArgs.count("-connect") && !fNoListen)
{
CreateThread(ThreadGetMyExternalIP, NULL);
}