Fix #566

src/bitmessagemain.py

@@ -16,6 +16,7 @@ import os
 
 from SimpleXMLRPCServer import SimpleXMLRPCServer
 from api import MySimpleXMLRPCRequestHandler
+from helper_startup import isOurOperatingSystemLimitedToHavingVeryFewHalfOpenConnections
 
 import shared
 from helper_sql import sqlQuery
@@ -59,10 +60,12 @@ def connectToStream(streamNumber):
     for row in queryData:
         shared.inventorySets[streamNumber].add(row[0])
 
-    if sys.platform[0:3] == 'win':
+    
+    if isOurOperatingSystemLimitedToHavingVeryFewHalfOpenConnections():
+        # Some XP and Vista systems can only have 10 outgoing connections at a time.
         maximumNumberOfHalfOpenConnections = 9
     else:
-        maximumNumberOfHalfOpenConnections = 32
+        maximumNumberOfHalfOpenConnections = 64
     for i in range(maximumNumberOfHalfOpenConnections):
         a = outgoingSynSender()
         a.setup(streamNumber, selfInitiatedConnections)

src/helper_startup.py

@@ -5,6 +5,8 @@ import os
 import locale
 import random
 import string
+import platform
+from distutils.version import StrictVersion
 
 from namecoin import ensureNamecoinOptions
 
@@ -119,3 +121,13 @@ def loadConfig():
             os.umask(0o077)
         with open(shared.appdata + 'keys.dat', 'wb') as configfile:
             shared.config.write(configfile)
+
+def isOurOperatingSystemLimitedToHavingVeryFewHalfOpenConnections():
+    try:
+        VER_THIS=StrictVersion(platform.version())
+        if sys.platform[0:3]=="win":
+            return StrictVersion("5.1.2600")<VER_THIS and StrictVersion("6.0.6000")>VER_THIS
+        return False
+    except Exception as err:
+        print 'An Exception occurred within isOurOperatingSystemLimitedToHavingVeryFewHalfOpenConnections:', err
+        return False