Cluster + Security

-----------------------------------

* initial observation of a problem was a 2% failure rate in perftests
  of 20,000 messages against a cluster with security enabled.
  Problem was occasional receit of encrypted frames before the
  security codec had been enabled.  This is fixed with locking in
  cluster code (no new locks in broker code) and a callback that is
  fired by broker::ConnectionHandler::Handler to tell the cluster
  code when the opening handshake has finished.
  This was never a problem in the non-clustered broker before because
  everything happened in a single thread.

* the brokers that "shadow" the connection must not have null
  authenticators rather than real ones, so that they go through all
  the motions but don't do anythig.  Only the directly-connected
  broker can perform the security handshake.

* once the directly-connected broker receives the real user ID
  from its callback, it mcasts that ID to all other brokers.
  Otherwise the shadowing brokers will al think that the user ID
  is "anonymous".
  Check this by doing a substantial perftest, and using
      qpid-stat -c localhost:PORT
  to confirm that the brokers all have the same userID for the
  same connection.

* the user ID, negotiated during the Sasl security startup, is
   communicated from the directly connected broker to all other
   cluster brokers.

* If security is *not* being used, then this code should *not* tell
  the brokers anything about the userID -- or it will step on the value
  that is being set by other code pathways.

* test program at cpp/src/tests/cluster_authentication_soak is not yet
  fully automated -- run it with something like
  "sudo ./cluster_authentication_soak 500"



git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk/qpid@944158 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 14 insertions, 4 deletions

diff --git a/cpp/src/qpid/broker/ConnectionHandler.cpp b/cpp/src/qpid/broker/ConnectionHandler.cpp
index 50a5aff2c9..b2d4210473 100644
--- a/cpp/src/qpid/broker/ConnectionHandler.cpp
+++ b/cpp/src/qpid/broker/ConnectionHandler.cpp
@@ -83,11 +83,11 @@ void ConnectionHandler::setSecureConnection(SecureConnection* secured)
     handler->secured = secured;
 }
 
-ConnectionHandler::ConnectionHandler(Connection& connection, bool isClient)  : handler(new Handler(connection, isClient)) {}
+ConnectionHandler::ConnectionHandler(Connection& connection, bool isClient, bool isShadow)  : handler(new Handler(connection, isClient, isShadow)) {}
 
-ConnectionHandler::Handler::Handler(Connection& c, bool isClient) :
+ConnectionHandler::Handler::Handler(Connection& c, bool isClient, bool isShadow) :
     proxy(c.getOutput()),
-    connection(c), serverMode(!isClient), acl(0), secured(0)
+    connection(c), serverMode(!isClient), acl(0), secured(0), userIdCallback(0)
 {
     if (serverMode) {
 
@@ -98,7 +98,7 @@ ConnectionHandler::Handler::Handler(Connection& c, bool isClient) :
 
         properties.setString(QPID_FED_TAG, connection.getBroker().getFederationTag());
 
-        authenticator = SaslAuthenticator::createAuthenticator(c);
+        authenticator = SaslAuthenticator::createAuthenticator(c, isShadow);
         authenticator->getMechanisms(mechanisms);
 
         Array locales(0x95);
@@ -181,6 +181,14 @@ void ConnectionHandler::Handler::tuneOk(uint16_t /*channelmax*/,
     connection.setHeartbeatInterval(heartbeat);
 }
 
+void ConnectionHandler::Handler::callUserIdCallbacks ( ) {
+    string s;
+    if ( false == authenticator->getUsername(s) )
+        s = "none";
+    if ( userIdCallback )
+      userIdCallback ( s );
+}
+
 void ConnectionHandler::Handler::open(const string& /*virtualHost*/,
                                       const framing::Array& /*capabilities*/, bool /*insist*/)
 {
@@ -195,6 +203,8 @@ void ConnectionHandler::Handler::open(const string& /*virtualHost*/,
         std::auto_ptr<SecurityLayer> sl = authenticator->getSecurityLayer(connection.getFrameMax());
         if (sl.get()) secured->activateSecurityLayer(sl);
     }
+
+    callUserIdCallbacks ( );
 }