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Limited relaying/storing of foreign addresses

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Introduce a boolean variable for each "network" (ipv4, ipv6, tor, i2p),
and track whether we are likely to able to connect to it. Addresses in
"addr" messages outside of our network get limited relaying and are not
stored in addrman.
This commit is contained in:
Pieter Wuille
2012-04-10 20:22:04 +02:00
parent d32148567f
commit 090e5b40f1
5 changed files with 60 additions and 4 deletions
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14
src/net.cpp
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@@ -45,8 +45,9 @@ bool OpenNetworkConnection(const CAddress& addrConnect, const char *strDest = NU
bool fClient = false;
static bool fUseUPnP = false;
uint64 nLocalServices = (fClient ? 0 : NODE_NETWORK);
CCriticalSection cs_mapLocalHost;
map<CNetAddr, int> mapLocalHost;
static CCriticalSection cs_mapLocalHost;
static map<CNetAddr, int> mapLocalHost;
static bool vfReachable[NET_MAX] = {};
static CNode* pnodeLocalHost = NULL;
uint64 nLocalHostNonce = 0;
array<int, THREAD_MAX> vnThreadsRunning;
@@ -214,6 +215,9 @@ bool AddLocal(const CNetAddr& addr, int nScore)
{
LOCK(cs_mapLocalHost);
mapLocalHost[addr] = std::max(nScore, mapLocalHost[addr]) + (mapLocalHost.count(addr) ? 1 : 0);
enum Network net = addr.GetNetwork();
vfReachable[net] = true;
if (net == NET_IPV6) vfReachable[NET_IPV4] = true;
}
AdvertizeLocal();
@@ -243,6 +247,12 @@ bool IsLocal(const CNetAddr& addr)
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);
return vfReachable[addr.GetNetwork()];
}
bool GetMyExternalIP2(const CService& addrConnect, const char* pszGet, const char* pszKeyword, CNetAddr& ipRet)
{