public bool Verify(X509Certificate certificate, ISender sender)
{
Address addr = null;
AHSender ahsender = sender as AHSender;
if (ahsender != null)
{
addr = ahsender.Destination;
}
else
{
Edge edge = sender as Edge;
if (edge != null)
{
Connection con = _ct.GetConnection(edge);
if (con != null)
{
addr = con.Address;
}
}
}
if (addr == null)
{
return(true);
}
return(CertificateHandler.Verify(certificate, addr.ToString()));
}
/**
* Handle the notification that the other side is going to close the edge
*/
public IDictionary Close(IDictionary close_message, ISender edge)
{
Edge from = GetEdge(edge);
ConnectionTable tab = _node.ConnectionTable;
/**
* In order to make sure that we close gracefully, we simply
* move this edge to the unconnected list. The node will
* close edges that have been there for some time
*/
Connection c = tab.GetConnection(from);
if (ProtocolLog.LinkDebug.Enabled)
{
ProtocolLog.Write(ProtocolLog.LinkDebug, String.Format(
"sys:link.Close on {0} connection: {1}", from, c));
}
tab.Disconnect(from);
/**
* Release locks when the close message arrives; do not wait
* until the edge actually closes.
*/
CloseHandler(from, null);
if (ProtocolLog.EdgeClose.Enabled)
{
String reason = String.Empty;
if (close_message.Contains(reason))
{
reason = (String)close_message["reason"];
}
ProtocolLog.Write(ProtocolLog.EdgeClose, String.Format(
"sys:link.Close - " + from + ": " + reason));
}
/**
* Try to close the edge after a small time span:
*/
Brunet.Util.FuzzyTimer.Instance.DoAfter(delegate(DateTime now) {
_node.EnqueueAction(new Node.GracefulCloseAction(_node, from, "CPH, delayed close"));
}, 5000, 1000);
return(new ListDictionary());
}
/**
* Get a StatusMessage for this node
*/
public IDictionary GetStatus(IDictionary status_message, ISender edge)
{
//we just got s status request
if (1 == _disconnecting)
{
throw new AdrException((int)ErrorMessage.ErrorCode.Disconnecting, "disconnecting");
}
StatusMessage sm = new StatusMessage(status_message);
Edge from = GetEdge(edge);
if (ProtocolLog.LinkDebug.Enabled)
{
ProtocolLog.Write(ProtocolLog.LinkDebug, String.Format(
"{0} -start- sys:link.GetStatus({1},{2})", _node.Address, sm, edge));
}
CphState cphstate = null;
if (from != null)
{
cphstate = _edge_to_cphstate[from] as CphState;
}
/**
* StatusMessage objects are used to verify the completion
* of the Link protocol. If we receive a StatusMessage request
* after we send a LinkMessage response, we know the other
* Node got our LinkMessage response, and the connection
* is active
*/
StatusMessage response = null;
ConnectionTable tab = _node.ConnectionTable;
if (cphstate != null)
{
try {
LinkMessage lm_to_add = cphstate.LM;
//This is part of connection process:
response = _node.GetStatus(sm.NeighborType, lm_to_add.Local.Address);
Connection con = new Connection(from,
lm_to_add.Local.Address,
lm_to_add.ConTypeString,
sm,
lm_to_add);
tab.Add(con);
}
finally {
from.CloseEvent -= this.CloseHandler;
CloseHandler(from, null);
}
}
else
{
//This is just a "regular" status request
//update our table:
Address fadd = null;
Connection c = tab.GetConnection(from);
if (c != null)
{
fadd = c.Address;
tab.UpdateStatus(c, sm);
}
response = _node.GetStatus(sm.NeighborType, fadd);
}
if (ProtocolLog.LinkDebug.Enabled)
{
ProtocolLog.Write(ProtocolLog.LinkDebug, String.Format(
"{0} -end- sys:link.GetStatus()->{1}", _node.Address, response));
}
return(response.ToDictionary());
}
/**
* This starts a linking operation on the given edge
*/
public IDictionary Start(IDictionary link_message, ISender edge)
{
if (ProtocolLog.LinkDebug.Enabled)
{
ProtocolLog.Write(ProtocolLog.LinkDebug, String.Format(
"{0} -start- sys:link.Start", _node.Address));
}
Edge from = GetEdge(edge);
LinkMessage lm = new LinkMessage(link_message);
if (ProtocolLog.LinkDebug.Enabled)
{
ProtocolLog.Write(ProtocolLog.LinkDebug, String.Format(
"{0} -args- sys:link.Start({1},{2})", _node.Address, lm, from));
}
CphState cph = new CphState(from, lm);
lock ( _sync ) {
if (!_edge_to_cphstate.ContainsKey(from))
{
_edge_to_cphstate[from] = cph;
}
else
{
throw new AdrException((int)ErrorMessage.ErrorCode.InProgress,
"Already have a link in progress on this edge");
}
}
ErrorMessage err = null;
if (CanConnect(cph, out err))
{
try {
//If the CloseEvent was already called, this throws an exception
from.CloseEvent += this.CloseHandler;
}
catch {
CloseHandler(from, null);
throw new AdrException((int)ErrorMessage.ErrorCode.EdgeClosed,
"Edge Closed after receiving message");
}
}
else
{
lock ( _sync ) {
_edge_to_cphstate.Remove(from);
}
}
//Now we prepare our response
LinkMessage lm_resp = null;
if (err == null)
{
//We send a response:
NodeInfo n_info = NodeInfo.CreateInstance(_node.Address, from.LocalTA);
NodeInfo remote_info = NodeInfo.CreateInstance(null, from.RemoteTA);
System.Collections.Specialized.StringDictionary attrs =
new System.Collections.Specialized.StringDictionary();
attrs["type"] = String.Intern(lm.ConTypeString);
attrs["realm"] = String.Intern(_node.Realm);
lm_resp = new LinkMessage(attrs, n_info, remote_info, lm.Token);
}
else
{
if (err.Ec == ErrorMessage.ErrorCode.AlreadyConnected)
{
/**
* When we send the ErrorCode.AlreadyConnected,
* we could have a stale connection, lets try pinging
* the other node, if they are there, but have lost
* the Edge, this may trigger the edge to close, causing
* us to remove the Connection.
* @todo consider putting this address on a "fast track"
* to removal if we don't hear from it soon
*/
ConnectionTable tab = _node.ConnectionTable;
Connection c = tab.GetConnection(lm.ConnectionType,
lm.Local.Address);
if (c != null)
{
RpcManager rpc = _node.Rpc;
rpc.Invoke(c.Edge, null, "sys:link.Ping", String.Empty);
}
}
}
if (err != null)
{
throw new AdrException((int)err.Ec, err.Message);
}
if (ProtocolLog.LinkDebug.Enabled)
{
ProtocolLog.Write(ProtocolLog.LinkDebug, String.Format(
"{0} -end- sys:link.Start()->{1}", _node.Address, lm_resp));
}
return(lm_resp.ToDictionary());
}
