internal void ProcessNewSessionKeyMessage(Node messageFrom, byte[] key)
{
string keyHash = FileFind.Common.SHA512Str(key);
// This lets us create a brand new session key
// if someone wants that for whatever reason.
if (messageFrom.SessionKeyDataHash != String.Empty && keyHash != messageFrom.SessionKeyDataHash)
{
Core.LoggingService.LogInfo("MessageProcessor: Re-keying with: {0}.", messageFrom.ToString());
messageFrom.ClearSessionKey();
}
if (messageFrom.FinishedKeyExchange == false)
{
Core.LoggingService.LogInfo("Received secure channel key from: {0}.", messageFrom.ToString());
messageFrom.SessionKeyDataHash = keyHash;
messageFrom.DecryptKeyExchange(key);
if (messageFrom.RemoteHasKey == true)
{
Core.LoggingService.LogInfo("Secure communication channel to {0} now avaliable.", messageFrom.ToString());
network.SendInfoToTrustedNode(messageFrom);
}
else
{
messageFrom.CreateNewSessionKey();
}
}
else
{
Core.LoggingService.LogWarning("Received secure communication key from: {0}, but key exchange was already finished!", messageFrom.ToString());
}
}
internal void ProcessReadyMessage(LocalNodeConnection connection, Node messageFrom)
{
if (connection.ConnectionState != ConnectionState.Ready)
{
connection.NodeRemote.RemotelyUntrusted = false;
connection.ConnectionState = ConnectionState.Ready;
connection.RaiseConnectionReady();
connection.RemoteNodeInfo.LastConnected = DateTime.Now;
Core.Settings.SyncNetworkInfoAndSave();
if (connection.ReadySent == false)
{
connection.SendReady();
}
if (messageFrom.FinishedKeyExchange == false &&
messageFrom.SentKeyExchange == false)
{
messageFrom.CreateNewSessionKey();
}
// The network needs to know about me this new connection,
// any nodes I know about, memos, etc... so say hi to
// everyone and let them know everything that I know.
Message message = network.MessageBuilder.CreateHelloMessage();
message.To = Network.BroadcastNodeID;
network.SendBroadcast(message);
}
else
{
// XXX: Do we need this?
if (connection.ReadySent == false)
{
connection.SendReady();
}
}
}
private void ProcessNewConnection(ConnectionInfo connection)
{
lock (nodes) {
Node DestNode = GetNode(connection.DestNodeID);
Node SourceNode = GetNode(connection.SourceNodeID);
if (DestNode != this.LocalNode & SourceNode != this.LocalNode) {
if (DestNode != SourceNode) {
if (this.FindConnection(connection.SourceNodeID, connection.DestNodeID) == null) {
if (SourceNode == null) {
SourceNode = new Node(this, connection.SourceNodeID);
SourceNode.NickName = connection.SourceNodeNickname;
AddNode(SourceNode);
if (this.TrustedNodes.ContainsKey(SourceNode.NodeID)) {
SourceNode.CreateNewSessionKey();
}
} else {
SourceNode.NickName = connection.SourceNodeNickname;
}
if (DestNode == null) {
DestNode = new Node(this, connection.DestNodeID);
DestNode.NickName = connection.DestNodeNickname;
AddNode(DestNode);
if (this.TrustedNodes.ContainsKey(DestNode.NodeID)) {
DestNode.CreateNewSessionKey();
}
} else {
DestNode.NickName = connection.DestNodeNickname;
}
RemoteNodeConnection c = new RemoteNodeConnection(this);
c.NodeLocal = SourceNode;
c.NodeRemote = DestNode;
c.ConnectionState = ConnectionState.Remote;
AddConnection(c);
} else {
// I am not really sure if this is actually useful...
SourceNode.NickName = connection.SourceNodeNickname;
DestNode.NickName = connection.DestNodeNickname;
}
} else {
LoggingService.LogWarning("Someone told me about an invalid connection - both sides are the same?! Thats no good!! " + connection.SourceNodeNickname + " <-> " + connection.DestNodeNickname);
}
} else {
if (this.FindConnection(connection.SourceNodeID, connection.DestNodeID) == null) {
LoggingService.LogWarning("THAT CONNECTION DOESNT EXIST!!!" + connection.SourceNodeNickname + " <-> " + connection.DestNodeNickname);
this.SendBroadcast(this.MessageBuilder.CreateConnectionDownMessage(connection.SourceNodeID, connection.DestNodeID), this.LocalNode);
}
}
}
}
// XXX: Refactor this entire method!
internal void ProcessMessage(object state)
{
Message message = null;
LocalNodeConnection connection;
try {
MessageInfo info = (MessageInfo)state;
connection = info.Connection;
message = info.Message;
if (Connections.Contains(connection) == false || connection.ConnectionState == ConnectionState.Disconnected) {
LoggingService.LogWarning("Network.ProcessMessage: Ignored message from disconnected connection.");
return;
}
if (this.processedMessages.ContainsKey(message.MessageID)) {
return;
}
this.processedMessages.Add(message.MessageID);
if (message.To == Network.BroadcastNodeID || message.To != this.LocalNode.NodeID) {
this.SendBroadcast(message, connection.NodeRemote);
if (message.To != Network.BroadcastNodeID)
return;
}
TrustedNodeInfo trustedNode = null;
if (trustedNodes.ContainsKey(message.From)) {
trustedNode = trustedNodes[message.From];
}
object content = message.Content;
if (message.From == this.LocalNode.NodeID) {
if (message.To != Network.BroadcastNodeID) {
// This shouldnt have happened, ever.
throw new Exception ("Attempt to process our own message. Type: " + message.Type.ToString());
} else {
// It's normal to receive our own messages again. Routing ain't so smart.
return;
}
}
Node messageFrom = null;
lock (nodes) {
messageFrom = GetNode(message.From);
if (messageFrom == null) {
// We don't know about this node! Lets add it.. oh, let's do.
if (trustedNode != null) {
// If its a trusted node that means we verified the message's signature,
// so we know its valid (and thus know this node actually exists).
Node node = new Node (this, message.From);
node.NickName = trustedNode.Identifier;
node.Verified = true;
AddNode(node);
messageFrom = node;
node.CreateNewSessionKey();
} else {
// Even if we can't verify that this node exists, we add it anyway.
// This has certain potential security issues, such as a flood of messages from random IDs,
// but there is really no way around that.
// The node will be marked Verified = false by default, so the GUI can ignore it.
// (This is added so things like ChatMessages work properly)
Node node = new Node (this, message.From);
node.NickName = "[" + message.From + "]";
AddNode(node);
messageFrom = node;
}
}
}
if (trustedNode == null) {
if (InsecureMessageTypes.IndexOf(message.Type) == -1) {
this.SendNonCriticalError (messageFrom, new NotTrustedError());
return;
}
}
// Make sure nobody is trying to screw with us
if (LocalOnlyMessageTypes.IndexOf (message.Type) > -1) {
if (messageFrom != connection.NodeRemote) {
this.SendCriticalError (messageFrom, new MeshworkError ("That message type is only valid for local connections."));
}
}
// Well, if they sent us something we can assume they trust us
if (message.To != Network.BroadcastNodeID) {
messageFrom.RemotelyUntrusted = false;
}
if (connection != null && (message.From == connection.RemoteNodeInfo.NodeID & message.To == this.LocalNode.NodeID & message.Type == MessageType.CriticalError)) {
MeshworkError error = ((MeshworkError)(content));
LoggingService.LogError("RECIEVED CRITICAL ERROR", error.Message);
if (ReceivedCriticalError != null) {
ReceivedCriticalError((INodeConnection)connection, error);
}
connection.Disconnect (error.ToException ());
return;
}
switch (message.Type) {
case MessageType.Ping:
processor.ProcessPingMessage(messageFrom, (ulong)content);
break;
case MessageType.Pong:
connection.ReceivedPong ((ulong)content);
//processor.ProcessPongMessage(messageFrom, (ulong)content);
break;
case MessageType.Auth:
processor.ProcessAuthMessage(connection, messageFrom, (AuthInfo)content, false);
break;
case MessageType.AuthReply:
processor.ProcessAuthMessage(connection, messageFrom, (AuthInfo)content, true);
break;
case MessageType.RequestKey:
processor.ProcessRequestKeyMessage(messageFrom);
break;
case MessageType.MyKey:
processor.ProcessMyKeyMessage(messageFrom, (KeyInfo)content);
break;
case MessageType.RequestInfo:
processor.ProcessRequestInfoMessage(messageFrom);
break;
case MessageType.NewSessionKey:
processor.ProcessNewSessionKeyMessage(messageFrom, (byte[])content);
break;
case MessageType.MyInfo:
processor.ProcessMyInfoMessage(messageFrom, (NodeInfo)content);
break;
case MessageType.NonCriticalError:
processor.ProcessNonCriticalErrorMessage(messageFrom,
(MeshworkError)content);
break;
case MessageType.SearchRequest:
processor.ProcessSearchRequestMessage (messageFrom, (SearchRequestInfo)content);
break;
case MessageType.SearchResult:
processor.ProcessSearchResultMessage (messageFrom, (SearchResultInfo)content);
break;
/*
case MessageType.SendFile:
processor.ProcessSendFileMessage (messageFrom, (SharedFileInfo)content);
break;
*/
case MessageType.RequestFile:
processor.ProcessRequestFileMessage(messageFrom, (RequestFileInfo)content);
break;
case MessageType.ConnectionDown:
processor.ProcessConnectionDownMessage (messageFrom, (ConnectionInfo)content);
break;
case MessageType.JoinChat:
processor.ProcessJoinChatMessage (messageFrom, (ChatAction)content);
break;
case MessageType.LeaveChat:
processor.ProcessLeaveChatMessage (messageFrom, (ChatAction)content);
break;
case MessageType.ChatInvite:
processor.ProcessChatInviteMessage (messageFrom, (ChatInviteInfo)content);
break;
case MessageType.ChatroomMessage:
processor.ProcessChatMessage (messageFrom, (ChatMessage)content);
break;
case MessageType.PrivateMessage:
processor.ProcessPrivateMessage (messageFrom, content.ToString());
break;
case MessageType.Ready:
processor.ProcessReadyMessage (connection, messageFrom); //, (NetworkState)content);
break;
case MessageType.AddMemo:
processor.ProcessAddMemoMessage (messageFrom, (MemoInfo)content);
break;
case MessageType.DeleteMemo:
processor.ProcessDeleteMemoMessage (messageFrom, content.ToString ());
break;
case MessageType.RequestDirListing:
processor.ProcessRequestDirListingMessage (messageFrom, content.ToString());
break;
case MessageType.RespondDirListing:
Core.FileSystem.ProcessRespondDirListingMessage (this, messageFrom, (SharedDirectoryInfo)content);
break;
case MessageType.Ack:
processor.ProcessAckMessage(messageFrom, content.ToString());
break;
case MessageType.Hello:
processor.ProcessHelloMessage (messageFrom, (HelloInfo)content);
break;
// case MessageType.NetworkState:
// AppendNetworkState ( content as NetworkState );
// //processor.ProcessNetworkStateMessage (
// break;
case MessageType.RequestFileDetails:
processor.ProcessRequestFileDetails(messageFrom, (string)content);
break;
case MessageType.FileDetails:
Core.FileSystem.ProcessFileDetailsMessage(this, messageFrom, (SharedFileListing)content);
break;
case MessageType.RequestAvatar:
processor.ProcessRequestAvatarMessage(messageFrom);
break;
case MessageType.Avatar:
processor.ProcessAvatarMessage(messageFrom, (byte[])content);
break;
case MessageType.Test:
// Do nothing here.
break;
default:
LoggingService.LogWarning("Received unhandled Message type: {0}, content: {1}", message.Type, content);
break;
}
// else if (Message.Type == MessageTypes.networkState)
// AppendNetworkState(((NetworkState)(content)));
// //TODO: Why are we checking mesage types
// if (message.Type != MessageType.Ack & message.Type != MessageType.Ping & message.Type != MessageType.Pong & message.Type != MessageType.Auth & message.Type != MessageType.AuthReply) {
if (nodes.ContainsKey(message.From)) {
if (this.TrustedNodes.ContainsKey(message.From) && MessageTypesToAck.IndexOf(message.Type) > -1) {
this.SendRoutedMessage((this.MessageBuilder.CreateAckMessage(message.MessageID, messageFrom)));
}
}
// }
} catch (Exception ex) {
// XXX: Better error handling!
string messageType = (message != null) ? message.Type.ToString() : "(Unknown)";
string messageFrom = (message != null) ? message.From : "(Unknown)";
LoggingService.LogError("Network.ProcessMessage: Error processing message of type {0} from {1}: {2}", messageType, messageFrom, ex.ToString());
}
}
internal void ProcessReadyMessage(LocalNodeConnection connection, Node messageFrom)
{
if (connection.ConnectionState != ConnectionState.Ready) {
connection.NodeRemote.RemotelyUntrusted = false;
connection.ConnectionState = ConnectionState.Ready;
connection.RaiseConnectionReady();
connection.RemoteNodeInfo.LastConnected = DateTime.Now;
Core.Settings.SyncNetworkInfoAndSave();
if (connection.ReadySent == false) {
connection.SendReady();
}
if (messageFrom.FinishedKeyExchange == false &&
messageFrom.SentKeyExchange == false) {
messageFrom.CreateNewSessionKey();
}
// The network needs to know about me this new connection,
// any nodes I know about, memos, etc... so say hi to
// everyone and let them know everything that I know.
Message message = network.MessageBuilder.CreateHelloMessage ();
message.To = Network.BroadcastNodeID;
network.SendBroadcast (message);
} else {
// XXX: Do we need this?
if (connection.ReadySent == false) {
connection.SendReady();
}
}
}
internal void ProcessNewSessionKeyMessage(Node messageFrom, byte[] key)
{
string keyHash = FileFind.Common.SHA512Str(key);
// This lets us create a brand new session key
// if someone wants that for whatever reason.
if (messageFrom.SessionKeyDataHash != String.Empty && keyHash != messageFrom.SessionKeyDataHash) {
LoggingService.LogInfo("MessageProcessor: Re-keying with: {0}.", messageFrom.ToString());
messageFrom.ClearSessionKey();
}
if (messageFrom.FinishedKeyExchange == false) {
LoggingService.LogInfo("Received secure channel key from: {0}.", messageFrom.ToString());
messageFrom.SessionKeyDataHash = keyHash;
messageFrom.DecryptKeyExchange(key);
if (messageFrom.RemoteHasKey == true) {
LoggingService.LogInfo("Secure communication channel to {0} now avaliable.", messageFrom.ToString());
network.SendInfoToTrustedNode(messageFrom);
} else {
messageFrom.CreateNewSessionKey();
}
} else {
LoggingService.LogWarning("Received secure communication key from: {0}, but key exchange was already finished!", messageFrom.ToString());
}
}
