Faster timeout when connecting

Use non-blocking connects, and a select() call to wait a predefined
time (5s by default, but configurable with -timeout) for either
success or failure. This allows much more connections to be tried
per time unit.

Based on a patch by phantomcircuit.

1 files changed, 2 insertions, 1 deletions

diff --git a/src/net.h b/src/net.h
index d1ded87232..8a55856eed 100644
--- a/src/net.h
+++ b/src/net.h
@@ -19,6 +19,7 @@ class CRequestTracker;
 class CNode;
 class CBlockIndex;
 extern int nBestHeight;
+extern int nConnectTimeout;
 
 
 
@@ -32,7 +33,7 @@ enum
 
 
 
-bool ConnectSocket(const CAddress& addrConnect, SOCKET& hSocketRet);
+bool ConnectSocket(const CAddress& addrConnect, SOCKET& hSocketRet, int nTimeout=nConnectTimeout);
 bool Lookup(const char *pszName, std::vector<CAddress>& vaddr, int nServices, int nMaxSolutions, bool fAllowLookup = false, int portDefault = 0, bool fAllowPort = false);
 bool Lookup(const char *pszName, CAddress& addr, int nServices, bool fAllowLookup = false, int portDefault = 0, bool fAllowPort = false);
 bool GetMyExternalIP(unsigned int& ipRet);