/// <summary>
/// Inits the Usage Manager.
/// </summary>
/// <param name="machine">The state machine for RELOAD overlay.</param>
public void Init(Machine machine) {
localNode = machine.Topology.LocalNode;
m_Transport = machine.Transport;
m_ReloadConfig = machine.ReloadConfig;
m_DispatcherQueue = machine.ReloadConfig.DispatcherQueue;
usages = new Dictionary<Usage_Code_Point, IUsage>();
m_ArrayManager = new ArrayManager();
}
public ReloadDialog(ReloadConfig reloadConfig, IForwardLinkManagement transport, Node nexthopnode) {
this.m_NextHopNode = nexthopnode;
this.m_Transport = transport;
this.m_fDone = new Port<bool>();
this.m_DispatcherQueue = reloadConfig.DispatcherQueue;
this.m_ReloadConfig = reloadConfig;
m_Transport.ReloadFLMEventHandler += new ReloadFLMEvent(OVL_ReloadForwardLinkManagementEventHandler);
if(nexthopnode.IceCandidates == null)
throw new System.Exception(String.Format("ReloadDialog: no ice candidates for {0} ", nexthopnode.Id));
}
public IEnumerator<ITask> Send(ReloadMessage reloadSendMsg, Node NextHopNode)
{
if (reloadSendMsg.reload_message_body.RELOAD_MsgCode ==
RELOAD_MessageCode.Error)
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_ERROR,
String.Format("{0} ==> {1} code={2}: msg=\"{3}\", dest={4}",
reloadSendMsg.reload_message_body.RELOAD_MsgCode.ToString().PadRight(16, ' '),
NextHopNode, ((ErrorResponse)reloadSendMsg.reload_message_body).ErrorCode,
((ErrorResponse)reloadSendMsg.reload_message_body).ErrorMsg,
reloadSendMsg.forwarding_header.destination_list[0]));
try
{
Arbiter.Activate(m_DispatcherQueue, new IterativeTask<Node, ReloadMessage>(NextHopNode, reloadSendMsg, GetForwardingAndLinkManagementLayer().Send));
}
catch (Exception ex)
{
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_ERROR,
"SendAnswer: " + ex.Message);
}
yield break;
}
public IEnumerator<ITask> AttachProcedure(Destination dest, NodeId NextHopId, AttachOption attach_option)
{
ReloadMessage reloadSendMsg;
/* 9.5.1
* When a peer needs to Attach to a new peer in its neighbor table, it
MUST source-route the Attach request through the peer from which it
learned the new peer's Node-ID. Source-routing these requests allows
the overlay to recover from instability.
*/
reloadSendMsg = create_attach_req(dest, (attach_option & AttachOption.forceupdate) != 0);
if (dest.type == DestinationType.node)
{
NodeState nodestate = m_topology.routing_table.GetNodeState(dest.destination_data.node_id);
if (nodestate == NodeState.attaching)
{
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_INFO, String.Format("Ignoring redundant Attach for {0}", dest));
yield break;
}
}
Boolean NextHopIsDestination = false;
Node NextHopNode = null;
if (NextHopId != null)
NextHopNode = m_topology.routing_table.GetNode(NextHopId);
if (NextHopNode == null)
NextHopNode = NextHopToDestination(dest, ref NextHopIsDestination);
if (NextHopNode == null)
yield break;
if (dest.type == DestinationType.node)
m_topology.routing_table.SetNodeState(dest.destination_data.node_id, NodeState.attaching);
ReloadDialog reloadDialog = null;
int RetransmissionTime = ReloadGlobals.RetransmissionTime + ReloadGlobals.MaxTimeToSendPacket;
int iRetrans = ReloadGlobals.MaxRetransmissions;
while (iRetrans >= 0 && m_ReloadConfig.State < ReloadConfig.RELOAD_State.Shutdown)
{
try
{
/* use a new ReloadDialog instance for every usage, Monitor requires it */
reloadDialog = new ReloadDialog(m_ReloadConfig, m_flm, NextHopNode);
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_RELOAD, String.Format("{0} via {1} ==> Dest={2} TransId={3:x16}",
RELOAD_MessageCode.Attach_Request.ToString().PadRight(16, ' '),
NextHopNode,
dest.ToString(),
reloadSendMsg.TransactionID));
Arbiter.Activate(m_DispatcherQueue, new IterativeTask<ReloadMessage, ReloadMessageFilter, int>(reloadSendMsg, new ReloadMessageFilter(reloadSendMsg.TransactionID), RetransmissionTime, reloadDialog.Execute));
}
catch (Exception ex)
{
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_ERROR, "AttachProcedure: " + ex.Message);
yield break;
}
yield return Arbiter.Receive(false, reloadDialog.Done, done => { });
if (!reloadDialog.Error && reloadDialog.ReceivedMessage != null)
{
ReloadMessage reloadRcvMsg = reloadDialog.ReceivedMessage;
if (dest.type == DestinationType.node)
{
if (reloadRcvMsg.OriginatorID != dest.destination_data.node_id)
{
// drop message and retransmit request
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_ERROR, String.Format("Received answer from unexpected peer"));
reloadRcvMsg = null;
}
}
else if (dest.type == DestinationType.resource)
{
int suc = m_topology.routing_table.GetSuccessorCount(false);
int pre = m_topology.routing_table.GetPredecessorCount(false);
if (suc >= 2 && pre >= 2)
{
// check if resource is mapping to a node in my routing table
if (dest.destination_data.ressource_id.ElementOfInterval(
m_topology.routing_table.Predecessors[pre - 2],
m_topology.routing_table.Successors[suc - 1],
true)
)
{
if (reloadRcvMsg.OriginatorID < m_topology.routing_table.Predecessors[pre - 2] && reloadRcvMsg.OriginatorID > m_topology.routing_table.Successors[suc - 1])
{
// drop message and retransmit request
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_ERROR, String.Format("Received answer from unexpected peer"));
reloadRcvMsg = null;
}
}
}
}
if (reloadRcvMsg != null)
break;
}
/* If a response has not been received when the timer fires, the request
is retransmitted with the same transaction identifier.
*/
--iRetrans;
if (iRetrans >= 0)
{
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_WARNING, String.Format("Retrans {0} SendAttach via {1} TransId={2:x16}", iRetrans, NextHopNode, reloadSendMsg.TransactionID));
m_ReloadConfig.Statistics.IncRetransmission();
}
else
{
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_ERROR, String.Format("Failed! SendAttach via {0} TransId={1:x16}", NextHopNode, reloadSendMsg.TransactionID));
m_ReloadConfig.Statistics.IncTransmissionError();
if (dest.destination_data.node_id != null)
{
//m_topology.routing_table.SetNodeState(dest.destination_data.node_id, NodeState.unknown);
m_topology.routing_table.Leave(dest.destination_data.node_id);
}
}
}
try
{
if (reloadDialog != null && !reloadDialog.Error && reloadDialog.ReceivedMessage != null)
{
/*the SourceNodeID delivered from reloadDialog comes from connection
* table and is the last hop of the message
*/
ReloadMessage reloadRcvMsg = reloadDialog.ReceivedMessage;
RELOAD_MessageCode msgCode = reloadRcvMsg.reload_message_body.RELOAD_MsgCode;
AttachReqAns answ = (AttachReqAns)reloadRcvMsg.reload_message_body;
if (msgCode == RELOAD_MessageCode.Attach_Answer)
{
/* TKTODO
* 1. The response to a message sent to a specific Node-ID MUST have
been sent by that Node-ID.
2. The response to a message sent to a Resource-Id MUST have been
sent by a Node-ID which is as close to or closer to the target
Resource-Id than any node in the requesting node's neighbor
table.
*/
if (answ != null)
{
Node Originator = new Node(reloadRcvMsg.OriginatorID, answ.ice_candidates);
/* An Attach in and of itself does not result in updating the routing
* table of either node.
* Note: We use the routing table here only for storing ice candidates
* for later use, we will not update successor or predecessor list
*/
m_topology.routing_table.AddNode(Originator);
m_topology.routing_table.SetNodeState(Originator.Id, NodeState.attached);
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_RELOAD,
String.Format("{0} <== {1} last={2} TransId={3:x16}",
msgCode.ToString().PadRight(16, ' '), reloadRcvMsg.OriginatorID,
reloadRcvMsg.LastHopNodeId, reloadRcvMsg.TransactionID));
if ((CheckAndSetAdmittingPeer(Originator) &&
Originator.Id != reloadRcvMsg.LastHopNodeId)
|| (attach_option & AttachOption.sendping) != 0)
{
// Send ping to get a physical connection
Arbiter.Activate(m_DispatcherQueue, new IterativeTask<Destination, PingOption>(new Destination(Originator.Id), PingOption.direct, SendPing));
}
}
}
else if (msgCode == RELOAD_MessageCode.Error)
{
if (dest.type == DestinationType.node)
{
ErrorResponse error = (ErrorResponse)reloadRcvMsg.reload_message_body;
if (error != null)
{
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_ERROR,
String.Format("AttachProcedure: Got Error {0} from {1} deleting {2}",
error.ErrorMsg,
reloadRcvMsg.OriginatorID,
dest.destination_data.node_id));
m_topology.routing_table.Leave(dest.destination_data.node_id);
}
}
}
}
}
catch (Exception ex)
{
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_ERROR, "AttachProcedure: " + ex.Message);
if (dest.destination_data.node_id != null)
m_topology.routing_table.SetNodeState(dest.destination_data.node_id, NodeState.unknown);
}
}
public IEnumerator<ITask> SendUpdate(Node node, Node nexthopnode)
{
ReloadDialog reloadDialog = null;
ReloadMessage reloadSendMsg;
/*if (m_topology.routing_table.isFinger(node.Id))
m_topology.routing_table.AddFinger(node);*/
if (nexthopnode == null)
nexthopnode = node;
Destination dest = new Destination(node.Id);
reloadSendMsg = create_update_req(dest, m_topology.routing_table,
ChordUpdateType.neighbors);
int RetransmissionTime = ReloadGlobals.RetransmissionTime +
ReloadGlobals.MaxTimeToSendPacket;
int iRetrans = ReloadGlobals.MaxRetransmissions;
while (iRetrans >= 0 && m_ReloadConfig.State < ReloadConfig.RELOAD_State.Shutdown)
{
try
{
reloadDialog = new ReloadDialog(m_ReloadConfig, m_flm, nexthopnode);
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_RELOAD,
String.Format("{0} ==> {1} TransId={2:x16}",
RELOAD_MessageCode.Update_Request.ToString().PadRight(16, ' '),
node.Id, reloadSendMsg.TransactionID));
//m_ReloadConfig.start
Arbiter.Activate(m_DispatcherQueue,
new IterativeTask<ReloadMessage, ReloadMessageFilter, int>(
reloadSendMsg, new ReloadMessageFilter(reloadSendMsg.TransactionID),
RetransmissionTime, reloadDialog.Execute));
}
catch (Exception ex)
{
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_ERROR,
"Send Update: " + ex.Message);
yield break;
}
yield return Arbiter.Receive(false, reloadDialog.Done, done => { });
if (!reloadDialog.Error && reloadDialog.ReceivedMessage != null)
break;
/* If a response has not been received when the timer fires, the request
is retransmitted with the same transaction identifier.
*/
--iRetrans;
if (iRetrans > 0)
{
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_WARNING,
String.Format("Retrans {0} SendUpdate {1}:{2} TransId={3:x16}",
iRetrans, node, nexthopnode, reloadSendMsg.TransactionID));
m_statistics.IncRetransmission();
}
else
{
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_ERROR,
String.Format("Failed! SendUpdate {0}:{1} TransId={2:x16}",
node, nexthopnode, reloadSendMsg.TransactionID));
m_statistics.IncTransmissionError();
}
}
try
{
if (!reloadDialog.Error && reloadDialog.ReceivedMessage != null)
{
//the SourceNodeID delivered from reloadDialog comes from connection table and is the last hop of the message
ReloadMessage reloadRcvMsg = reloadDialog.ReceivedMessage;
RELOAD_MessageCode msgCode = reloadRcvMsg.reload_message_body.RELOAD_MsgCode;
if (msgCode == RELOAD_MessageCode.Update_Answer)
{
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_RELOAD,
String.Format("{0} <== {1} TransId={2:x16}",
msgCode.ToString().PadRight(16, ' '), reloadRcvMsg.OriginatorID,
reloadRcvMsg.TransactionID));
UpdateReqAns answ = (UpdateReqAns)reloadRcvMsg.reload_message_body;
if (answ != null)
{
NodeId originator = reloadRcvMsg.OriginatorID;
if (m_topology.routing_table.FingerSuccessors.Contains(originator))
{
//m_topology.routing_table.GetNode(originator).Successors = answ.Successors;
//m_topology.routing_table.GetNode(originator).Predecessors = answ.Predecessors;
m_topology.routing_table.SetFingerState(originator,
NodeState.updates_received);
}
if (m_topology.routing_table.RtTable.ContainsKey(originator.ToString()))
{
m_topology.routing_table.SetNodeState(originator,
NodeState.updates_received);
m_topology.routing_table.GetNode(originator).Successors = answ.Successors;
m_topology.routing_table.GetNode(originator).Predecessors = answ.Predecessors;
}
}
}
}
}
catch (Exception ex)
{
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_ERROR,
"Send Update: " + ex.Message);
}
}
public IEnumerator<ITask> Send(Node node, byte[] buffer) {
Socket socket = null;
SimpleOverlayConnectionTableElement socte = null;
#if false
/* paranoia: check validity of buffer here again */
if ( buffer[0] != 0xC2
&& buffer[1] != 0x45
&& buffer[2] != 0x4c
&& buffer[3] != 0x4f)
{
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_ERROR, "SimpleFLM: Wrong Tag in Send message!");
yield break;
}
#endif
#if CONNECTION_MANAGEMENT
/* beginn connection management */
lock (m_connection_table) {
if (node.Id != null && m_connection_table.ContainsKey(node.Id.ToString())) {
SimpleOverlayConnectionTableElement el = m_connection_table[node.Id.ToString()];
if (el.NodeID == node.Id) {
if (el.AssociatedSocket.Connected) {
long offset = 0;
socket = el.AssociatedSocket;
try {
ReloadMessage reloadMsg = new ReloadMessage(m_ReloadConfig).FromBytes(buffer, ref offset, ReloadMessage.ReadFlags.no_certcheck);
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_SOCKET, String.Format("SimpleFLM: >> {0} {1} ==> {2}, TransID={3:x16}", socket.RemoteEndPoint, reloadMsg.reload_message_body.RELOAD_MsgCode.ToString(), node.Id.ToString(), reloadMsg.TransactionID));
socte = el;
}
catch (Exception ex) {
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_ERROR,
String.Format("SimpleFLM Send: {0}", ex.Message));
}
}
else {
// no longer connected, remove entry
m_connection_table.Remove(node.Id.ToString());
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_SOCKET, String.Format("SimpleFLM: >> {0} removed, associated with {1}", el.AssociatedSocket, node.Id.ToString()));
}
}
}
}
/* end connection management */
#endif
if (socket == null) {
if (node.IceCandidates != null) {
/* if (node.Id != null)
{
ReloadMessage reloadMsg = new ReloadMessage().FromBytes(buffer);
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_TEST, String.Format("SimpleFLM: {0} ==> {1} TransID={2:x16}", reloadMsg.reload_message_body.RELOAD_MsgCode.ToString(), node.Id.ToString(), reloadMsg.TransactionID));
}
*/
foreach (IceCandidate candidate in node.IceCandidates) {
switch (candidate.addr_port.type) {
case AddressType.IPv6_Address:
case AddressType.IPv4_Address: {
if (socket == null) {
socket = new Socket(candidate.addr_port.ipaddr.AddressFamily, SocketType.Stream, ProtocolType.Tcp);
var iarPort = new Port<IAsyncResult>();
socket.BeginConnect(new IPEndPoint(candidate.addr_port.ipaddr, candidate.addr_port.port), iarPort.Post, null);
yield return Arbiter.Receive(false, iarPort, iar => {
try {
socket.EndConnect(iar);
}
catch (Exception ex) {
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_ERROR, "SimpleFLM: Send Connect: " + ex.Message);
HandleRemoteClosing(socket);
if (socket.Connected)
socket.Shutdown(SocketShutdown.Both);
socket.Close();
socket = null;
return;
}
});
}
}
break;
}
//just support one ice candidate only here
break;
}
}
else {
long offset = 0;
ReloadMessage reloadMsg = new ReloadMessage(m_ReloadConfig).FromBytes(buffer, ref offset, ReloadMessage.ReadFlags.no_certcheck);
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_ERROR, String.Format("SimpleFLM: {0} ==> {1} TransID={2:x16} (No ice candidates and no connection!)", reloadMsg.reload_message_body.RELOAD_MsgCode.ToString(), node.Id.ToString(), reloadMsg.TransactionID));
m_ReloadConfig.Statistics.IncConnectionError();
}
}
if (socket != null) {
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_SOCKET,
String.Format("SimpleFLM: >> {0} Send {1} bytes",
socket.RemoteEndPoint, buffer.Length));
var iarPort2 = new Port<IAsyncResult>();
socte = new SimpleOverlayConnectionTableElement();
byte[] framed_buffer = addFrameHeader(socte, buffer);
socket.BeginSend(framed_buffer, 0, framed_buffer.Length,
SocketFlags.None, iarPort2.Post, null);
m_ReloadConfig.Statistics.BytesTx = (UInt64)framed_buffer.Length;
yield return Arbiter.Receive(false, iarPort2, iar => {
try {
socket.EndSend(iar);
}
catch (Exception ex) {
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_ERROR,
"SimpleFLM: SocketError : " + ex.Message);
m_ReloadConfig.Statistics.IncConnectionError();
}
});
#if CONNECTION_MANAGEMENT
if (socket.Connected) {
/* beginn connection management */
lock (m_connection_table) {
if (node.Id != null && node.Id != m_ReloadConfig.LocalNodeID)
if (m_connection_table.ContainsKey(node.Id.ToString())) {
SimpleOverlayConnectionTableElement rcel = m_connection_table[node.Id.ToString()];
rcel.LastActivity = DateTime.Now;
}
else {
SimpleOverlayConnectionTableElement rcel = new SimpleOverlayConnectionTableElement();
rcel.NodeID = node.Id;
rcel.AssociatedSocket = socket;
rcel.LastActivity = rcel.Start = DateTime.Now;
rcel.Outbound = true;
m_connection_table.Add(rcel.NodeID.ToString(), rcel);
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_SOCKET, String.Format("SimpleFLM: >> {0} Send: Associating node {1}", socket.RemoteEndPoint, rcel.NodeID.ToString()));
Arbiter.Activate(m_ReloadConfig.DispatcherQueue, new IterativeTask<Socket, NodeId>(socket, node.Id, Receive));
}
}
if (node.Id == null) {
Arbiter.Activate(m_ReloadConfig.DispatcherQueue, new IterativeTask<Socket, NodeId>(socket, node.Id, Receive));
}
}
else {
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_ERROR, "SimpleFLM: Socket not connected after send");
}
/* end connection management */
#else
if(socket.Connected)
socket.Shutdown(SocketShutdown.Both);
socket.Close();
#endif
}
}
public IEnumerator<ITask> AppAttachProcedure(Destination dest)
{
ReloadMessage reloadSendMsg;
reloadSendMsg = create_app_attach_req(dest);
if (dest.type != DestinationType.node)
{
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_ERROR, String.Format("AppAttachProcedure failed: unexpected destination type"));
yield break;
}
if (dest.destination_data.node_id == m_topology.Id)
{
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_INFO, String.Format("local AppAttachProcedure dropped"));
yield break;
}
Node node = m_topology.routing_table.FindNextHopTo(dest.destination_data.node_id, true, false);
if (node == null)
{
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_ERROR, String.Format("AppAttachProcedure: failed, did not found next hop to {0}", dest.destination_data.node_id));
yield break;
}
ReloadDialog reloadDialog = null;
int RetransmissionTime = ReloadGlobals.RetransmissionTime + ReloadGlobals.MaxTimeToSendPacket;
int iRetrans = ReloadGlobals.MaxRetransmissions;
m_topology.routing_table.SetNodeState(dest.destination_data.node_id,
NodeState.attaching);
while (iRetrans >= 0 && m_ReloadConfig.State < ReloadConfig.RELOAD_State.Shutdown)
{
try
{
/* use a new ReloadDialog instance for every usage, Monitor requires it */
reloadDialog = new ReloadDialog(m_ReloadConfig, m_flm, node);
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_RELOAD,
String.Format("{0} via {1} ==> Dest={2} TransId={3:x16}",
RELOAD_MessageCode.App_Attach_Request.ToString().PadRight(16, ' '),
node, dest.ToString(), reloadSendMsg.TransactionID));
Arbiter.Activate(m_DispatcherQueue,
new IterativeTask<ReloadMessage, ReloadMessageFilter, int>(
reloadSendMsg, new ReloadMessageFilter(reloadSendMsg.TransactionID),
RetransmissionTime, reloadDialog.Execute));
}
catch (Exception ex)
{
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_ERROR, "AppAttachProcedure: " + ex.Message);
}
yield return Arbiter.Receive(false, reloadDialog.Done, done => { });
if (!reloadDialog.Error && reloadDialog.ReceivedMessage != null)
break;
/* If a response has not been received when the timer fires, the request
is retransmitted with the same transaction identifier.
*/
--iRetrans;
}
try
{
if (!reloadDialog.Error && reloadDialog.ReceivedMessage != null)
{
//the SourceNodeID delivered from reloadDialog comes from connection table and is the last hop of the message
ReloadMessage reloadRcvMsg = reloadDialog.ReceivedMessage;
if (reloadRcvMsg.reload_message_body.RELOAD_MsgCode == RELOAD_MessageCode.App_Attach_Answer)
{
AppAttachReqAns answ = (AppAttachReqAns)reloadRcvMsg.reload_message_body;
if (answ != null)
{
node = new Node(reloadRcvMsg.OriginatorID, answ.ice_candidates);
/* An Attach in and of itself does not result in updating the routing
* table of either node.
* Note: We use the routing table here only for storing ice candidates
* for later use, we will not update successor or predecessor list
*/
m_topology.routing_table.AddNode(node);
if (m_topology.routing_table.GetNodeState(node.Id) < NodeState.attached)
m_topology.routing_table.SetNodeState(node.Id, NodeState.attached);
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_RELOAD, String.Format("{0} <== {1} last={2} TransId={3:x16}",
reloadRcvMsg.reload_message_body.RELOAD_MsgCode.ToString().PadRight(16, ' '), reloadRcvMsg.OriginatorID, reloadRcvMsg.LastHopNodeId, reloadRcvMsg.TransactionID));
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_USAGE,
String.Format("AppAttach returns IP: {0}",
answ.ice_candidates[0].addr_port.ipaddr.ToString()));
/* Proprietary registry interface function to support external clients */
ReloadGlobals.StoreRegAnswer("sip:" + answ.ice_candidates[0].addr_port.ipaddr.ToString() + ":5060");
m_ReloadConfig.ConnEstEnd = DateTime.Now;
if (AppAttachDone != null) appAttachDone.Post(answ.ice_candidates[0]);
if (ReloadGlobals.AutoExe)
{
TimeSpan appAttachTime = DateTime.Now - m_ReloadConfig.StartFetchAttach;
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_MEASURE, String.Format("Fetch:{0}", appAttachTime.TotalSeconds));
}
}
}
else if (reloadRcvMsg.reload_message_body.RELOAD_MsgCode == RELOAD_MessageCode.Error)
{
// TODO
}
}
else
{
m_topology.routing_table.SetNodeState(dest.destination_data.node_id, NodeState.unknown);
}
}
catch (Exception ex)
{
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_ERROR, "AppAttachProcedure: " + ex.Message);
m_topology.routing_table.SetNodeState(dest.destination_data.node_id, NodeState.unknown);
}
}
public void reload_app_attach_inbound(ReloadMessage recmsg)
{
AppAttachReqAns req_answ = (AppAttachReqAns)recmsg.reload_message_body;
NodeId OriginatorID = recmsg.OriginatorID;
Node Originator = new Node(recmsg.OriginatorID, req_answ.ice_candidates);
m_topology.routing_table.AddNode(Originator);
m_topology.routing_table.SetNodeState(Originator.Id, NodeState.attached);
//Proprietary --joscha
string destination_overlay = null;
string source_overlay = null;
if (recmsg.forwarding_header.fw_options != null)
{
foreach (ForwardingOption option in recmsg.forwarding_header.fw_options)
{
if (option.fwo_type == ForwardingOptionsType.destinationOverlay)
{
destination_overlay = System.Text.Encoding.Unicode.GetString(option.bytes);
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_ERROR, String.Format("{0} Message for destinationOverlay=" + destination_overlay, recmsg.reload_message_body.RELOAD_MsgCode));
}
if (option.fwo_type == ForwardingOptionsType.sourceOverlay)
{
source_overlay = System.Text.Encoding.Unicode.GetString(option.bytes);
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_ERROR, String.Format("Message from sourceOverlay=" + source_overlay));
}
}
}
if (destination_overlay == null)// --joscha Do not establish a connection to a different overlay
if (CheckAndSetAdmittingPeer(Originator) && Originator.Id != recmsg.LastHopNodeId)
// Send ping to establish a physical connection
Arbiter.Activate(m_DispatcherQueue,
new IterativeTask<Destination, PingOption>(new Destination(Originator.Id),
PingOption.direct, SendPing));
if (source_overlay == m_ReloadConfig.OverlayName)
{
// Send ping to establish a physical connection
Arbiter.Activate(m_DispatcherQueue,
new IterativeTask<Destination, PingOption>(new Destination(Originator.Id),
PingOption.direct, SendPing));
}
if (req_answ != null && req_answ.ice_candidates != null)
{
if (recmsg.IsRequest())
{
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_INFO, String.Format("transport.cs - reload_app_attach_inbound"));
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_RELOAD,
String.Format("{0} ==> {1} TransId={2:x16}",
RELOAD_MessageCode.App_Attach_Answer.ToString().PadRight(16, ' '),
OriginatorID, recmsg.TransactionID));
ReloadMessage sendmsg = create_app_attach_answ(
new Destination(OriginatorID), recmsg.TransactionID);
recmsg.PutViaListToDestination(sendmsg);
//sendmsg.addOverlayForwardingOptions(recmsg); //--joscha
send(sendmsg, m_topology.routing_table.GetNode(recmsg.LastHopNodeId));
}
else
{
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_ERROR, String.Format("{0} <== {1} (not handled!!)", req_answ.RELOAD_MsgCode.ToString().PadRight(16, ' '), OriginatorID));
}
}
}
public void AddNode(Node node) {
try {
String nodestr = node.Id.ToString();
lock (m_RtTable) {
if (!m_RtTable.ContainsKey(nodestr) &&
node.Id != m_local_node.Id) {
/*
* important! we currently assume, that this function is called
* in context of attach ans, with exchanged ice
* candidates in any other case attached should not be set to
* true. The flag attached signals that this node
* can be part of the official successor/predecessor list
*/
m_RtTable.Add(nodestr, new RTableEntry()
{
icecandidates = node.IceCandidates,
dtLastSuccessfullPing = DateTime.MinValue,
nodestate = NodeState.unknown,
node = node
});
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_INFO,
String.Format("AddNode: {0}", node));
}
}
}
catch (Exception ex) {
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_ERROR,
"Topology.AddNode: " + ex.Message);
}
/*Is a finger?*/
if (isFinger(node.Id))
AddFinger(node, NodeState.attached);
}
public AppAttachReqAns(Node chordnode, bool req)
{
RELOAD_MsgCode = req ? RELOAD_MessageCode.App_Attach_Request : RELOAD_MessageCode.App_Attach_Answer;
ice_candidates = chordnode.IceCandidates;
}
public AttachReqAns(Node chordnode, bool req, bool send_update, bool isBootstrap, bool gatherActiveHostOnly) // markus: chordnode is always m_topology.LocalNode
// markus, also check if localnode is a bootstrap
{
RELOAD_MsgCode = req ? RELOAD_MessageCode.Attach_Request : RELOAD_MessageCode.Attach_Answer;
// markus:
// ufrag and password
ufrag = new byte[255];
password = new byte[255];
// RFC 5245, ICE, Section 15.4:
// The ice-ufrag and ice-pwd attributes MUST be chosen randomly at the beginning of a session
Random random = new Random();
random.NextBytes(ufrag);
random.NextBytes(password);
// NO_ICE // markus
if (ReloadGlobals.UseNoIce)
{
//ice_candidates = chordnode.IceCandidates;
ice_candidates = chordnode.NoIceCandidates; // there is only one entry in NoIceCandidates
}
// ICE
else
{
if (isBootstrap)
{
IceCandidate bootstrapCandidate = ICE.CreateBootstrapCandidate(chordnode.NoIceCandidates[0].addr_port.ipaddr, chordnode.NoIceCandidates[0].addr_port.port);
chordnode.IceCandidates = new List<IceCandidate>();
chordnode.IceCandidates.Add(bootstrapCandidate);
ice_candidates = chordnode.IceCandidates;
}
else
{
List<IceCandidate> iceCandidates = null;
if (!gatherActiveHostOnly)
// gathering candidates and overwrite localnode candidates
iceCandidates = ICE.GatherCandidates();
else
iceCandidates = ICE.GatherActiveCandidatesForBootstrap();
iceCandidates = ICE.PrioritizeCandidates(iceCandidates);
chordnode.IceCandidates = ice_candidates = iceCandidates; // chordnode is localnode !
}
}
fSendUpdate = send_update;
}
public LeaveReqAns(Node leaving_node, bool req)
{
RELOAD_MsgCode = req ? RELOAD_MessageCode.Leave_Request : RELOAD_MessageCode.Leave_Answer;
if (req)
{
m_ID = leaving_node.Id;
}
}
public JoinReqAns(Node joining_node, bool req)
{
RELOAD_MsgCode = req ? RELOAD_MessageCode.Join_Request : RELOAD_MessageCode.Join_Answer;
if (req)
{
m_ID = joining_node.Id;
}
}
public Boolean CheckAndSetAdmittingPeer(Node node)
{
if (!m_ReloadConfig.IsBootstrap)
if ((m_ReloadConfig.AdmittingPeer == null ||
node.Id.ElementOfInterval(m_topology.Id,
m_ReloadConfig.AdmittingPeer.Id, true)) &&
!(m_ReloadConfig.AdmittingPeer != null &&
m_ReloadConfig.AdmittingPeer.Id == node.Id))
{
m_ReloadConfig.AdmittingPeer = node;
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_RELOAD,
String.Format("AttachProcedure: Successfully attached to new" +
"admitting peer {0}", m_ReloadConfig.AdmittingPeer.Id));
return true;
}
return false;
}
public bool Init(Machine machine) {
#if false
Console.Title = String.Format("{3}Node {0}:{1}, ID {2}", ReloadGlobals.HostName, ReloadGlobals.ListenPort, ReloadGlobals.LocalNodeID, ReloadGlobals.SimpleNodeId ? " DEMO " : "");
#endif
IPAddress Address = null;
if (ReloadGlobals.HostName != "") {
Address = ReloadGlobals.IPAddressFromHost(m_ReloadConfig,
ReloadGlobals.HostName);
}
//TKTEST IETF
// Address = new IPAddress(new byte[] { 192, 168, 2, 147 });
if (Address == null) {
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_ERROR,
"Couldn't figure out my IP Address");
return false;
}
/*use the attach request functionaliy to store
* ip-address and port to ice candidates in local node */
AttachReqAns attreq = new AttachReqAns();
m_localnode = new Node(m_id, attreq.IPAddressToIceCandidate(
Address, m_ReloadConfig.ListenPort));
m_localnode.NoIceCandidates = m_localnode.IceCandidates; // markus: backup of NOICE candidates
m_routing_table = new RoutingTable(m_localnode, machine);
m_ReloadConfig.LocalNode = m_localnode;
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_TOPO,
String.Format("Local node is {0}", m_localnode));
return true;
}
public void reload_attach_inbound(ReloadMessage recmsg)
{
try
{
AttachReqAns req_answ = (AttachReqAns)recmsg.reload_message_body;
NodeId OriginatorID = recmsg.OriginatorID;
if (req_answ != null && req_answ.ice_candidates != null)
{
//if (ReloadGlobals.UseNoIce || m_ReloadConfig.IsBootstrap)
//{
//Node attacher = new Node(recmsg.OriginatorID, req_answ.ice_candidates); // markus, moved down
//bool isFinger = m_topology.routing_table.isFinger(attacher.Id);
//m_topology.routing_table.AddNode(attacher);
//m_topology.routing_table.SetNodeState(recmsg.OriginatorID, NodeState.attached);
//}
// incoming ATTACH REQUEST, so localnode is controlled agent
if (recmsg.IsRequest())
{
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_RELOAD,
String.Format("{0} ==> {1} TransId={2:x16}",
RELOAD_MessageCode.Attach_Answer.ToString().PadRight(16, ' '),
OriginatorID, recmsg.TransactionID));
ReloadMessage sendmsg = create_attach_answ(
new Destination(OriginatorID), recmsg.TransactionID);
// log output
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_INFO, String.Format("Attach Request: Transaction ID: {0:x}", recmsg.TransactionID));
foreach (IceCandidate cand in ((AttachReqAns)sendmsg.reload_message_body).ice_candidates)
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_INFO, String.Format("Attach Request: Gathered local candidate for Answer: {0}:{1} (TransId: {2:x})", cand.addr_port.ipaddr.ToString(), cand.addr_port.port, sendmsg.TransactionID));
foreach (IceCandidate cand in req_answ.ice_candidates)
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_INFO, String.Format("Attach Request: Received remote candidate: {0}:{1} (TransId: {2:x})", cand.addr_port.ipaddr.ToString(), cand.addr_port.port, recmsg.TransactionID));
recmsg.PutViaListToDestination(sendmsg);
//sendmsg.addOverlayForwardingOptions(recmsg); //Proprietary //--Joscha
if (m_machine is GWMachine)
{ //workaround in case date is stored at the gateway node responsible to route the message back into the interconnectionoverlay
if (sendmsg.forwarding_header.destination_list[0].destination_data.node_id == ((GWMachine)m_machine).GateWay.interDomainPeer.Topology.LocalNode.Id)
{
sendmsg.reload_message_body.RELOAD_MsgCode = RELOAD_MessageCode.Fetch_Answer;
((GWMachine)m_machine).GateWay.interDomainPeer.Transport.receive_message(sendmsg);
}
else
send(sendmsg, m_topology.routing_table.GetNode(recmsg.LastHopNodeId));
}
else
{
send(sendmsg, m_topology.routing_table.GetNode(recmsg.LastHopNodeId));
}
// markus
if (!ReloadGlobals.UseNoIce) // using ICE
{
// we only need ICE processing if localnode is a peer (in case of bootstrap we need no checks)
if (!m_ReloadConfig.IsBootstrap)
{
#region ICE TODO
// localnode is Peer => ICE processing (this is controlled node)
AttachReqAns attachAnswer = (AttachReqAns)sendmsg.reload_message_body;
// deep copy of local and remote ice candidates
List<IceCandidate> localIceCandidatesCopy = new List<IceCandidate>();
List<IceCandidate> remoteIceCandidatesCopy = new List<IceCandidate>();
// local candidates
foreach (IceCandidate cand in attachAnswer.ice_candidates)
{
IceCandidate deepCopy = (IceCandidate)cand.Clone();
localIceCandidatesCopy.Add(deepCopy);
}
// remote candidates
foreach (IceCandidate cand in req_answ.ice_candidates)
{
IceCandidate deepCopy = (IceCandidate)cand.Clone();
remoteIceCandidatesCopy.Add(deepCopy);
}
// now form check list
//CheckList checkList = ICE.FormCheckList(attachAnswer.ice_candidates, req_answ.ice_candidates, false);
CheckList checkList = ICE.FormCheckList(localIceCandidatesCopy, remoteIceCandidatesCopy, false);
ICE.PrintCandidatePairList(checkList.candidatePairs);
Console.WriteLine("ThreadId: {0}, send_params einfügen: checkList count {1}", Thread.CurrentThread.ManagedThreadId, checkList.candidatePairs.Count);
// Add to connection queue
for (int i = 0; i < checkList.candidatePairs.Count; i++)
{
ReloadSendParameters send_params = new ReloadSendParameters()
{
connectionTableEntry = null,
destinationAddress = checkList.candidatePairs[i].remoteCandidate.addr_port.ipaddr,
port = checkList.candidatePairs[i].remoteCandidate.addr_port.port,
buffer = null,
frame = false,
done = new Port<bool>(),
// markus
connectionSocket = null,
};
// if key already exists => skip
if (!GetForwardingAndLinkManagementLayer().GetConnectionQueue().ContainsKey(checkList.candidatePairs[i].remoteCandidate))
GetForwardingAndLinkManagementLayer().GetConnectionQueue().Add(checkList.candidatePairs[i].remoteCandidate, send_params);
}
ICE.ScheduleChecks(checkList, m_ReloadConfig.Logger);
// Wait for signals of all succeded candidate pairs. Only one of the succeded candidate pairs is nominated
#region signaling
// wait for nomination signal
List<Thread> waitingThreads = new List<Thread>();
foreach (CandidatePair candPair in checkList.candidatePairs)
{
if (candPair.state == CandidatePairState.Succeeded)
{
switch (candPair.localCandidate.tcpType)
{
case TcpType.Active:
{
if (candPair.localCandidate.activeConnectingSocket != null)
{
Thread waitThread = new Thread(() =>
{
candPair.nominated = ICE.WaitForSignal(candPair.localCandidate.activeConnectingSocket);
});
waitingThreads.Add(waitThread);
waitThread.Start();
}
}
break;
case TcpType.Passive:
{
if (candPair.localCandidate.passiveAcceptedSocket != null)
{
Thread waitThread = new Thread(() =>
{
candPair.nominated = ICE.WaitForSignal(candPair.localCandidate.passiveAcceptedSocket);
});
waitingThreads.Add(waitThread);
waitThread.Start();
}
}
break;
case TcpType.SO:
{
if (candPair.localCandidate.soAcceptedSocket != null)
{
Thread waitThread = new Thread(() =>
{
candPair.nominated = ICE.WaitForSignal(candPair.localCandidate.soAcceptedSocket);
});
waitingThreads.Add(waitThread);
waitThread.Start();
}
else if (candPair.localCandidate.soConnectingSocket != null)
{
Thread waitThread = new Thread(() =>
{
candPair.nominated = ICE.WaitForSignal(candPair.localCandidate.soConnectingSocket);
});
waitingThreads.Add(waitThread);
waitThread.Start();
}
}
break;
} // switch
} // if
} // foreach
// wait for all threads
foreach (Thread waitingThread in waitingThreads)
{
waitingThread.Join();
}
#endregion
// choose pair
CandidatePair choosenPair = null;
// any nominated pair?
if (checkList.candidatePairs.Any(item => item.nominated == true))
{
choosenPair = checkList.candidatePairs.First(item => item.nominated == true);
}
// Close all sockets of all candidate pairs not nominated
//for (int i = 0; i < checkList.candidatePairs.Count; i++)
// if ((!checkList.candidatePairs[i].nominated) || (checkList.candidatePairs[i].state != CandidatePairState.Succeeded))
// ICE.CloseAllCandidateSockets(checkList.candidatePairs[i].localCandidate);
// add node with chosen remote candidate
if (choosenPair != null)
{
// save connection
//GetForwardingAndLinkManagementLayer().SaveConnection(choosenPair);
// get connection
Socket socket = GetForwardingAndLinkManagementLayer().GetConnection(choosenPair);
// Get IPAdress and Port of the attacher from attachers certificate cn
System.Security.Cryptography.X509Certificates.X509Certificate2 tempcert = new System.Security.Cryptography.X509Certificates.X509Certificate2(recmsg.security_block.Certificates[0].Certificate);
IPEndPoint attacherEndpoint =
new IPEndPoint(IPAddress.Parse(tempcert.SubjectName.Name.ToString().Split(':')[1]),
Convert.ToInt32( tempcert.SubjectName.Name.ToString().Split(':')[2]));
// StartReloadTLSClient
GetForwardingAndLinkManagementLayer().StartReloadTLSClient(OriginatorID, socket, attacherEndpoint);
// for all candidates send_params.done = true
for (int i = 0; i < checkList.candidatePairs.Count; i++)
{
ReloadSendParameters send_params;
GetForwardingAndLinkManagementLayer().GetConnectionQueue().TryGetValue(checkList.candidatePairs[i].remoteCandidate, out send_params);
if (send_params != null)
{
send_params.done.Post(true);
// remove from connection queue
GetForwardingAndLinkManagementLayer().GetConnectionQueue().Remove(checkList.candidatePairs[i].remoteCandidate);
}
}
List<IceCandidate> choosenRemoteCandidates = new List<IceCandidate>();
choosenRemoteCandidates.Add(choosenPair.remoteCandidate);
Node attacher = new Node(recmsg.OriginatorID, choosenRemoteCandidates);
bool isFinger = m_topology.routing_table.isFinger(attacher.Id);
m_topology.routing_table.AddNode(attacher);
m_topology.routing_table.SetNodeState(recmsg.OriginatorID, NodeState.attached);
}
// free all port mappings created by UPnP
foreach (IceCandidate cand in attachAnswer.ice_candidates)
{
if (cand.cand_type == CandType.tcp_nat)
{
UPnP upnp = new UPnP();
bool discovered = upnp.Discover(cand.rel_addr_port.ipaddr);
if (discovered)
upnp.DeletePortMapping(cand.addr_port.port, ProtocolType.Tcp);
}
}
#endregion
}
else
{
// localnode is bootstrap => no ICE processing
Node attacher = new Node(recmsg.OriginatorID, req_answ.ice_candidates);
bool isFinger = m_topology.routing_table.isFinger(attacher.Id);
m_topology.routing_table.AddNode(attacher);
m_topology.routing_table.SetNodeState(recmsg.OriginatorID, NodeState.attached);
}
}
// using NO ICE
else
{
Node attacher = new Node(recmsg.OriginatorID, req_answ.ice_candidates);
bool isFinger = m_topology.routing_table.isFinger(attacher.Id);
m_topology.routing_table.AddNode(attacher);
m_topology.routing_table.SetNodeState(recmsg.OriginatorID, NodeState.attached);
}
// markus end
if (req_answ.SendUpdate)
Arbiter.Activate(m_DispatcherQueue, new IterativeTask<Node, Node>(
m_topology.routing_table.GetNode(OriginatorID),
m_topology.routing_table.GetNode(recmsg.LastHopNodeId),
SendUpdate));
}
// incoming ATTACH ANSWER, so localnode is controlling agent
// and localnode must be a peer, because bootstraps dont create attach requests and because of this cant receive an attach answer
else
{
// using NOICE
if (ReloadGlobals.UseNoIce) // markus: added if/else statement
{
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_ERROR,
String.Format("{0} <== {1} (not handled!!)",
req_answ.RELOAD_MsgCode.ToString().PadRight(16, ' '), OriginatorID));
}
// using ICE
else
{
// get local candidates from request
List<IceCandidate> localCandidates = null;
bool gotLocalCandidate = m_attachRequestCandidates.TryGetValue(recmsg.TransactionID, out localCandidates);
// log output
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_INFO, String.Format("Attach Answer: Transaction ID: {0:x}", recmsg.TransactionID));
foreach (IceCandidate cand in localCandidates)
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_INFO, String.Format("Attach Answer: Got local candidate: {0}:{1} (TransId: {2:x})", cand.addr_port.ipaddr.ToString(), cand.addr_port.port, recmsg.TransactionID));
foreach (IceCandidate cand in req_answ.ice_candidates)
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_INFO, String.Format("Attach Answer: Received remote candidate: {0}:{1} (TransId: {2:x})", cand.addr_port.ipaddr.ToString(), cand.addr_port.port, recmsg.TransactionID));
if (req_answ.ice_candidates != null)
{
// we need ice, except the answering peer is a bootstrap
bool needIce = true;
//// bootstrap responses with only one candidate
//if (req_answ.ice_candidates.Count == 1)
//{
// is it really a bootstrap?
if (req_answ.ice_candidates[0].cand_type == CandType.tcp_bootstrap)
{
// attached to a bootstrap, so we have to do nothing here, no ice processing needed
needIce = false;
}
//}
if (needIce)
{
#region ICE TODO
// ICE processing (this is controlling node)
if (gotLocalCandidate)
{
// deep copy of remote ice candidates
List<IceCandidate> remoteIceCandidatesCopy = new List<IceCandidate>();
// remote candidates
foreach (IceCandidate cand in req_answ.ice_candidates)
{
IceCandidate deepCopy = (IceCandidate)cand.Clone();
remoteIceCandidatesCopy.Add(deepCopy);
}
//CheckList checkList = ICE.FormCheckList(localCandidates, req_answ.ice_candidates, true);
CheckList checkList = ICE.FormCheckList(localCandidates, remoteIceCandidatesCopy, true);
ICE.PrintCandidatePairList(checkList.candidatePairs);
ICE.ScheduleChecks(checkList, m_ReloadConfig.Logger);
m_attachRequestCandidates.Remove(recmsg.TransactionID);
#region signaling
// any succeeded pair?
if (checkList.candidatePairs.Any(item => item.state == CandidatePairState.Succeeded))
{
// get all succeeded pairs
List<CandidatePair> succeededPairs = checkList.candidatePairs.Where(item => item.state == CandidatePairState.Succeeded).ToList();
// send nomination signal to peer
bool sentSuccessfull = false;
bool nominated;
int counter = 0;
foreach (CandidatePair pair in succeededPairs)
{
// simply nominate the first succeeded pair
if (counter == 0)
nominated = true;
else
nominated = false;
switch (pair.localCandidate.tcpType)
{
case TcpType.Active:
{
if (pair.localCandidate.activeConnectingSocket != null)
{
sentSuccessfull = ICE.SendSignal(pair.localCandidate.activeConnectingSocket, nominated);
pair.nominated = nominated;
}
}
break;
case TcpType.Passive:
{
if (pair.localCandidate.passiveAcceptedSocket != null)
{
sentSuccessfull = ICE.SendSignal(pair.localCandidate.passiveAcceptedSocket, nominated);
pair.nominated = nominated;
}
}
break;
case TcpType.SO:
{
if (pair.localCandidate.soAcceptedSocket != null)
{
sentSuccessfull = ICE.SendSignal(pair.localCandidate.soAcceptedSocket, nominated);
pair.nominated = nominated;
}
else if (pair.localCandidate.soConnectingSocket != null)
{
sentSuccessfull = ICE.SendSignal(pair.localCandidate.soConnectingSocket, nominated);
pair.nominated = nominated;
}
}
break;
} // switch
counter++;
} // foreach
if (sentSuccessfull)
{
}
#endregion // signaling
// Start Server here, if a nominated pair exists
if (checkList.candidatePairs.Any(item => item.nominated))
{
CandidatePair choosenPair = checkList.candidatePairs.First(item => item.nominated);
// save connection here too?
//GetForwardingAndLinkManagementLayer().SaveConnection(choosenPair);
// get connection
Socket socket = GetForwardingAndLinkManagementLayer().GetConnection(choosenPair);
// StartReloadTLSServer
GetForwardingAndLinkManagementLayer().StartReloadTLSServer(socket);
} // if (any nominated)
} // if (any succeeded pair)
// Close all sockets of all candidate pairs not nominated
//for (int i = 0; i < checkList.candidatePairs.Count; i++)
// if ((!checkList.candidatePairs[i].nominated) || (checkList.candidatePairs[i].state != CandidatePairState.Succeeded))
// ICE.CloseAllCandidateSockets(checkList.candidatePairs[i].localCandidate);
}
#endregion // ICE
}
// existing nat candidates to free?
if (localCandidates != null)
{
// free all port mappings created by UPnP
foreach (IceCandidate cand in localCandidates)
{
if (cand.cand_type == CandType.tcp_nat)
{
UPnP upnp = new UPnP();
bool discovered = upnp.Discover(cand.rel_addr_port.ipaddr);
if (discovered)
upnp.DeletePortMapping(cand.addr_port.port, ProtocolType.Tcp);
}
}
}
}
}
}
}
}
catch (Exception e)
{
throw;
}
}
public RoutingTable(Node local_node, Machine machine) {
m_ReloadConfig = machine.ReloadConfig;
m_flm = machine.Interface_flm;
m_DispatcherQueue = machine.ReloadConfig.DispatcherQueue;
m_transport = machine.Transport;
m_local_node = local_node;
m_successors = new List<NodeId>();
m_predecessors = new List<NodeId>();
m_fingerSuccessors = new List<NodeId>();
for (int i = 0; i < 128; i++)
m_FingerTable.Add(new FTableEntry()
{
Finger = new ResourceId(local_node.Id + ReloadGlobals.BigIntPow2Array[i]),
dtLastSuccessfullFinger = DateTime.MinValue,
nodestate = NodeState.unknown
});
/*
A peer MUST NOT enter
itself in its successor or predecessor table and instead should leave
the entries empty.
*/
}
internal void send(ReloadMessage reloadMsg, Node NextHopNode)
{
if (NextHopNode == null || NextHopNode.Id == null)
throw new System.Exception("Node == null on send");
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_ERROR, String.Format("!!! send: !!! {0} to {1}", Enum.GetName(typeof(RELOAD_MessageCode), reloadMsg.reload_message_body.RELOAD_MsgCode), reloadMsg.forwarding_header.destination_list[0]));
if (m_ReloadConfig.State < ReloadConfig.RELOAD_State.Exit)
Arbiter.Activate(m_DispatcherQueue,
new IterativeTask<ReloadMessage, Node>(reloadMsg, NextHopNode, Send));
}
/// <summary>
/// Adds a new finger and sets its state.
/// Note, only fingers for which we received a update
/// will be used for routing.
/// </summary>
/// <param name="testFinger">The remote finger</param>
/// <param name="state">Normally, attached because update has no Node
/// </param>
public void AddFinger(Node testFinger, NodeState state) {
if (m_ReloadConfig.IamClient)
return;
foreach (FTableEntry ftEntry in FingerTable) {
if (!m_fingerSuccessors.Contains(ftEntry.Successor))
m_fingerSuccessors.Add(ftEntry.Successor);
if (ftEntry.nodestate == NodeState.unknown) {
if (ftEntry.Finger.ElementOfInterval(m_local_node.Id, testFinger.Id, true)) {
ftEntry.dtLastSuccessfullFinger = DateTime.Now;
ftEntry.nodestate = state;
ftEntry.pinging = false;
ftEntry.Successor = testFinger.Id;
ftEntry.valid = true;
}
}
/* Node if confirmed as routable */
else if (ftEntry.nodestate == NodeState.attached &&
state == NodeState.updates_received) {
ftEntry.nodestate = state;
}
else { // is closer?
if (testFinger.Id.ElementOfInterval(ftEntry.Finger, ftEntry.Successor, false)) {
ftEntry.dtLastSuccessfullFinger = DateTime.Now;
ftEntry.nodestate = state;
ftEntry.pinging = false;
ftEntry.Successor = testFinger.Id;
ftEntry.valid = true;
}
}
}
currFingerNo = m_fingerSuccessors.Count;
}
public IEnumerator<ITask> PreJoinProdecure(List<BootstrapServer> BootstrapServerList)
{
bool attached = false;
ulong bsTransId = 0;
if (m_topology.LocalNode.Id == null)
yield break;
ReloadMessage reloadSendMsg;
ReloadMessage reloadRcvMsg = null;
/* This is the begin of populating the neighbor table
convert local node to resource id + 1 and sent an attach to it
*/
Destination dest = new Destination(new ResourceId(
m_topology.LocalNode.Id + (byte)1));
Destination last_destination = null;
Node NextHopNode = null;
int succSize = m_ReloadConfig.IamClient ? 1 : ReloadGlobals.SUCCESSOR_CACHE_SIZE;
for (int i = 0; i < succSize; i++)
{
//if (last_destination != null && last_destination == dest)
if (last_destination != null && last_destination.Equals(dest)) // markus: we have to use Equals method
break;
if (m_ReloadConfig.IamClient)
reloadSendMsg = create_attach_req(dest, false);
else
reloadSendMsg = create_attach_req(dest, true);
//we do not know the bootstrap peer's node id so far so we leave that parameter empty Node(null)
ReloadDialog reloadDialog = null;
int RetransmissionTime = ReloadGlobals.RetransmissionTime + ReloadGlobals.MaxTimeToSendPacket;
/* Modification for Clients out of draft, TLS stack will take some time
* to initialize, add another 10s waiting */
if (m_ReloadConfig.IamClient && i == 0)
RetransmissionTime += 10000;
int iRetrans = ReloadGlobals.MaxRetransmissions;
int iCycleBootstrap = 0;
while (iRetrans >= 0 &&
m_ReloadConfig.State < ReloadConfig.RELOAD_State.Shutdown)
{
/* This is the first bootstrap contacting sequence if NextHopNode
* is still zero, in any other case
* use an attach to the node where we got the last answer from
*/
if (NextHopNode == null)
{
/* we could use a foreach loop, but CCR would multitask it, but we
* want serialize that here
*/
if (iCycleBootstrap >= BootstrapServerList.Count())
iCycleBootstrap = 0;
BootstrapServer bss = BootstrapServerList[iCycleBootstrap++];
if (attached == true)
break;
//TKTODO Rejoin of bootstrap server not solved
List<IceCandidate> ics = new List<IceCandidate>();
IceCandidate ice = new IceCandidate(new IpAddressPort(
AddressType.IPv4_Address, ReloadGlobals.IPAddressFromHost(
m_ReloadConfig, bss.Host), (UInt16)bss.Port),
Overlay_Link.TLS_TCP_FH_NO_ICE);
// markus: change cand_type to bootstrap
ice.cand_type = CandType.tcp_bootstrap;
ics.Add(ice);
NextHopNode = new Node(reloadRcvMsg == null ?
null : reloadRcvMsg.OriginatorID, ics);
}
try
{
/* use a new ReloadDialog instance for every usage, Monitor requires it */
reloadDialog = new ReloadDialog(m_ReloadConfig, m_flm, NextHopNode);
if (iCycleBootstrap > 0)
{
// save transaction id from request to bootstrap
if (NextHopNode.IceCandidates[0].addr_port.ipaddr.ToString() == BootstrapServerList[iCycleBootstrap - 1].Host &&
NextHopNode.IceCandidates[0].addr_port.port == BootstrapServerList[iCycleBootstrap - 1].Port)
bsTransId = reloadSendMsg.TransactionID;
}
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_RELOAD,
String.Format("{0} ==> {1} Dest={2} TransId={3:x16}",
RELOAD_MessageCode.Attach_Request.ToString().PadRight(16, ' '),
NextHopNode, dest.ToString(), reloadSendMsg.TransactionID));
Arbiter.Activate(m_DispatcherQueue,
new IterativeTask<ReloadMessage, ReloadMessageFilter, int>(
reloadSendMsg, new ReloadMessageFilter(reloadSendMsg.TransactionID),
RetransmissionTime, reloadDialog.Execute));
}
catch (Exception ex)
{
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_ERROR,
"PreJoinProcedure: " + ex.Message);
}
yield return Arbiter.Receive(false, reloadDialog.Done, done => { });
if (!reloadDialog.Error && reloadDialog.ReceivedMessage != null)
{
if (reloadDialog.ReceivedMessage.TransactionID == bsTransId)
{
if (reloadDialog.ReceivedMessage.forwarding_header.via_list.Count == 1)
{
BootstrapServer bsServer = BootstrapServerList[iCycleBootstrap - 1];
bsServer.NodeId = reloadDialog.ReceivedMessage.forwarding_header.via_list[0].destination_data.node_id;
BootstrapServerList.RemoveAt(iCycleBootstrap - 1);
BootstrapServerList.Insert(iCycleBootstrap - 1, bsServer);
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_RELOAD, String.Format("Bootstrap ID: {0}", reloadDialog.ReceivedMessage.forwarding_header.via_list[0].destination_data.node_id));
//Console.WriteLine("Bootstrap ID: {0}", reloadDialog.ReceivedMessage.forwarding_header.via_list[0].destination_data.node_id);
}
else if (reloadDialog.ReceivedMessage.forwarding_header.via_list.Count == 2)
{
BootstrapServer bsServer = BootstrapServerList[iCycleBootstrap - 1];
bsServer.NodeId = reloadDialog.ReceivedMessage.forwarding_header.via_list[1].destination_data.node_id;
BootstrapServerList.RemoveAt(iCycleBootstrap - 1);
BootstrapServerList.Insert(iCycleBootstrap - 1, bsServer);
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_RELOAD, String.Format("Bootstrap ID: {0}", reloadDialog.ReceivedMessage.forwarding_header.via_list[1].destination_data.node_id));
//Console.WriteLine("Bootstrap ID: {0}", reloadDialog.ReceivedMessage.forwarding_header.via_list[1].destination_data.node_id);
}
bsTransId = 0;
}
break;
}
/* still bootstrapping, allow cycling trough different bootstraps by
* resetting NextHopNode
*/
if (i == 0)
NextHopNode = null;
/* If a response has not been received when the timer fires, the request
is retransmitted with the same transaction identifier.
*/
--iRetrans;
if (iRetrans >= 0)
{
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_WARNING, String.Format("Retrans {0} Attach {1} TransId={2:x16}", iRetrans, NextHopNode, reloadSendMsg.TransactionID));
m_statistics.IncRetransmission();
}
else
{
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_ERROR, String.Format("Failed! Attach {0} TransId={1:x16}", NextHopNode, reloadSendMsg.TransactionID));
m_statistics.IncTransmissionError();
if (ReloadGlobals.AutoExe)
{
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_ERROR, "PreJoin: Exit because initial Attach Faild!");
m_machine.SendCommand("Exit");
}
}
}
try
{
if (reloadDialog != null && !reloadDialog.Error && reloadDialog.ReceivedMessage != null)
{
//the SourceNodeID delivered from reloadDialog comes from connection table and is the last hop of the message
reloadRcvMsg = reloadDialog.ReceivedMessage;
RELOAD_MessageCode msgCode = reloadRcvMsg.reload_message_body.RELOAD_MsgCode;
if (reloadRcvMsg != null)
{
if (msgCode == RELOAD_MessageCode.Attach_Answer)
{
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_RELOAD,
String.Format("{0} <== {1} last={2} TransId={3:x16}",
msgCode.ToString().PadRight(16, ' '), reloadRcvMsg.OriginatorID,
reloadRcvMsg.LastHopNodeId, reloadRcvMsg.TransactionID));
AttachReqAns answ = (AttachReqAns)reloadRcvMsg.reload_message_body;
if (answ != null)
{
m_ReloadConfig.State = ReloadConfig.RELOAD_State.PreJoin;
m_machine.StateUpdates(ReloadConfig.RELOAD_State.PreJoin);
/* An Attach in and of itself does not result in updating the routing
* table of either node.
* Note: We use the routing table here only for storing ice candidates
* for later use, we will not update successor or predecessor list
*/
NextHopNode = new Node(reloadRcvMsg.OriginatorID, answ.ice_candidates);
/* An Attach in and of itself does not result in updating the routing
* table of either node.
* Note: We use the routing table here only for storing ice candidates
* for later use, we will not update successor or predecessor list
*/
m_topology.routing_table.AddNode(NextHopNode);
m_topology.routing_table.SetNodeState(NextHopNode.Id,
NodeState.attached);
if (CheckAndSetAdmittingPeer(NextHopNode) &&
NextHopNode.Id != reloadRcvMsg.LastHopNodeId)
// Send ping to establish a physical connection
Arbiter.Activate(m_DispatcherQueue,
new IterativeTask<Destination, PingOption>(new Destination(
NextHopNode.Id), PingOption.direct, SendPing));
if (m_ReloadConfig.IamClient)
{
m_ReloadConfig.LastJoinedTime = DateTime2.Now;
TimeSpan joiningTime = m_ReloadConfig.LastJoinedTime - m_ReloadConfig.StartJoinMobile;
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_MEASURE,
"Join:" + joiningTime.TotalSeconds.ToString());
}
attached = true;
}
}
else if (msgCode == RELOAD_MessageCode.Error)
{
if (dest.type == DestinationType.node)
{
ErrorResponse error = (ErrorResponse)reloadRcvMsg.reload_message_body;
if (error != null)
{
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_ERROR,
String.Format("Prejoin: Got Error {0} from {1} deleting {2}",
error.ErrorMsg,
reloadRcvMsg.OriginatorID,
dest.destination_data.node_id));
m_topology.routing_table.Leave(dest.destination_data.node_id);
}
}
}
}
else
{
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_ERROR, "PreJoinProcedure: reloadRcvMsg == null!!");
}
last_destination = dest;
dest = new Destination(new ResourceId(reloadRcvMsg.OriginatorID) + (byte)1);
}
else
break;
}
catch (Exception ex)
{
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_ERROR, "PreJoinProcedure: " + ex.Message);
}
} // End Successor Search
// FingerTable enrichment
if (!m_ReloadConfig.IamClient)
{
List<FTEntry> fingers = m_topology.routing_table.AttachFingers();
Port<bool> attachNextPort = null;
Boolean attachNext = true;
/* JP SHOULD send Attach requests to initiate connections to each of
* the peers in the neighbor table as well as to the desired finger
* table entries.
*/
foreach (FTEntry finger in fingers)
{
attachNextPort = new Port<bool>();
Arbiter.Activate(m_DispatcherQueue,
new IterativeTask<FTEntry, Port<bool>>(
finger, attachNextPort, AttachFinger));
/* Wait for finger attach */
yield return Arbiter.Receive(false, attachNextPort, next =>
{
attachNext = next;
});
if (!attachNext)
break;
}
}
/* see base -18 p.106
/* 4. JP MUST enter all the peers it has contacted into its routing
/* table.
*/
m_topology.routing_table.Conn2Route();
/* Once JP has a reasonable set of connections it is ready to take its
* place in the DHT. It does this by sending a Join to AP.
*/
if (m_ReloadConfig.AdmittingPeer != null)
if (!m_ReloadConfig.IamClient)
{
m_ReloadConfig.State = ReloadConfig.RELOAD_State.Joining;
m_machine.StateUpdates(ReloadConfig.RELOAD_State.Joining);
m_topology.routing_table.SetWaitForJoinAnsw(
m_ReloadConfig.AdmittingPeer.Id, true);
reloadSendMsg = create_join_req(
new Destination(m_ReloadConfig.AdmittingPeer.Id));
ReloadDialog reloadDialog = null;
int RetransmissionTime = ReloadGlobals.RetransmissionTime + ReloadGlobals.MaxTimeToSendPacket;
int iRetrans = ReloadGlobals.MaxRetransmissions;
while (iRetrans >= 0 && m_ReloadConfig.State < ReloadConfig.RELOAD_State.Shutdown)
{
reloadDialog = new ReloadDialog(m_ReloadConfig, m_flm, m_ReloadConfig.AdmittingPeer);
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_RELOAD, String.Format("{0} ==> {1} TransId={2:x16}", RELOAD_MessageCode.Join_Request.ToString().PadRight(16, ' '), m_ReloadConfig.AdmittingPeer, reloadSendMsg.TransactionID));
Arbiter.Activate(m_DispatcherQueue, new IterativeTask<ReloadMessage, ReloadMessageFilter, int>(reloadSendMsg, new ReloadMessageFilter(reloadSendMsg.TransactionID), RetransmissionTime, reloadDialog.Execute));
yield return Arbiter.Receive(false, reloadDialog.Done, done => { });
if (!reloadDialog.Error && reloadDialog.ReceivedMessage != null)
break;
/* If a response has not been received when the timer fires, the request
is retransmitted with the same transaction identifier.
*/
--iRetrans;
if (iRetrans >= 0)
{
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_WARNING, String.Format("Retrans {0} Join {1} TransId={2:x16}", iRetrans, m_ReloadConfig.AdmittingPeer, reloadSendMsg.TransactionID));
m_statistics.IncRetransmission();
}
else
{
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_ERROR, String.Format("Failed! Join {0} TransId={1:x16}", m_ReloadConfig.AdmittingPeer, reloadSendMsg.TransactionID));
m_statistics.IncTransmissionError();
}
}
try
{
if (!reloadDialog.Error)
{
reloadRcvMsg = reloadDialog.ReceivedMessage;
RELOAD_MessageCode msgCode = reloadRcvMsg.reload_message_body.RELOAD_MsgCode;
if (reloadRcvMsg != null)
{
if (msgCode == RELOAD_MessageCode.Join_Answer)
{
m_topology.routing_table.SetWaitForJoinAnsw(reloadRcvMsg.OriginatorID, false);
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_RELOAD,
String.Format("{0} <== {1} TransId={2:x16}",
msgCode.ToString().PadRight(16, ' '), reloadRcvMsg.OriginatorID,
reloadRcvMsg.TransactionID));
NodeState nodestate = m_topology.routing_table.GetNodeState(reloadRcvMsg.OriginatorID);
if (nodestate == NodeState.updates_received)
{
/* we previously received an update from admitting peer (maybe
* race condition), now joining is complete in any other case
* wait for updates to come from this node */
m_ReloadConfig.State = ReloadConfig.RELOAD_State.Joined;
m_machine.StateUpdates(ReloadConfig.RELOAD_State.Joined);
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_RELOAD, String.Format("Joining completed"));
m_ReloadConfig.LastJoinedTime = DateTime.Now;
TimeSpan joiningTime = m_ReloadConfig.LastJoinedTime - m_ReloadConfig.StartJoining;
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_MEASURE, String.Format("Join:{0}", joiningTime.TotalSeconds.ToString()));
m_topology.routing_table.SendUpdateToAllNeighbors();
}
else
{
m_ReloadConfig.LastJoinedTime = DateTime.Now;
TimeSpan joiningTime = m_ReloadConfig.LastJoinedTime - m_ReloadConfig.StartTime;
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_MEASURE, String.Format("Join:{0}", joiningTime.TotalSeconds.ToString()));
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_WARNING,
String.Format("Prejoin: nodestate != update_recv at Node {0}", m_machine.ReloadConfig.ListenPort));
}
//m_topology.routing_table.SendUpdatesToAllFingers();
}
}
else
{
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_ERROR, "PreJoinProcedure: reloadRcvMsg == null!!");
}
}
}
catch (Exception ex)
{
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_ERROR, "PreJoinProcedure: " + ex.Message);
}
}
else
{
if (m_ReloadConfig.SipUri == "")
m_ReloadConfig.SipUri = String.Format("{0}@{1}", ReloadGlobals.HostName,
m_ReloadConfig.OverlayName);
if (m_ReloadConfig.SipUri != null && m_ReloadConfig.SipUri != "")
{
// explictite SIP registration as minimal config for RELOAD clients
IUsage sipRegistration = m_machine.UsageManager.CreateUsage(Usage_Code_Point.SIP_REGISTRATION,
2,
m_ReloadConfig.SipUri);
sipRegistration.ResourceName = m_ReloadConfig.SipUri;
List<StoreKindData> clientRegistrationList = new List<StoreKindData>();
StoreKindData sipKindData = new StoreKindData(sipRegistration.KindId,
0, new StoredData(sipRegistration.Encapsulate(true)));
clientRegistrationList.Add(sipKindData);
Arbiter.Activate(m_DispatcherQueue, new IterativeTask<string, List<StoreKindData>>(m_ReloadConfig.SipUri, clientRegistrationList, Store));
}
}
else
{
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_MEASURE,
String.Format("PreJoinPredure => Node {0} has no admitting peer = {1}!",
m_machine.ReloadConfig.ListenPort, m_ReloadConfig.AdmittingPeer));
if (ReloadGlobals.AutoExe)
{
m_machine.SendCommand("Exit");
}
}
} // End PreJoin
} // End PreJoin
/// <summary>
/// Attaches to a node needed to enrich the finger table.
/// </summary>
/// <param name="finger"></param>
/// <returns></returns>
public IEnumerator<ITask> AttachFinger(FTEntry finger,
Port<bool> attachNext)
{
Destination dest = new Destination(finger.Finger);
ReloadMessage reloadSendMsg = create_attach_req(dest, false);
ReloadDialog reloadDialog = null;
int RetransmissionTime = ReloadGlobals.RetransmissionTime +
ReloadGlobals.MaxTimeToSendPacket;
int iRetrans = ReloadGlobals.MaxRetransmissions;
Boolean NextHopIsDestination = false;
var myNodeId = m_topology.LocalNode.Id;
Node nextHopNode = NextHopToDestination(dest, ref NextHopIsDestination);
if (nextHopNode == null ||
nextHopNode.Id == m_ReloadConfig.LocalNodeID)
nextHopNode = m_ReloadConfig.AdmittingPeer;
if (nextHopNode == null) //{
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_ERROR,
String.Format("No Route to Finger! {0}", finger.Finger));
//attachNext.Post(true);
// yield break;
//}
//else {
while (iRetrans >= 0 && m_ReloadConfig.State < ReloadConfig.RELOAD_State.Shutdown)
{
try
{
reloadDialog = new ReloadDialog(m_ReloadConfig, m_flm, nextHopNode);
m_forwarding.LoopedTrans = new Port<UInt64>();
if (reloadDialog == null)
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_RELOAD,
"ReloadDialog null!");
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_TOPO,
String.Format("Finger-{0} via {1} ==> Dest={2} TransId={3:x16}",
RELOAD_MessageCode.Attach_Request.ToString().PadRight(16, ' '),
nextHopNode, dest.ToString(), reloadSendMsg.TransactionID));
Arbiter.Activate(m_DispatcherQueue,
new IterativeTask<ReloadMessage, ReloadMessageFilter, int>(reloadSendMsg,
new ReloadMessageFilter(reloadSendMsg.TransactionID), RetransmissionTime,
reloadDialog.Execute));
}
catch (Exception e)
{
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_ERROR,
String.Format("AttachFinger: " + e));
attachNext.Post(true);
yield break;
}
bool gotLoop = false;
yield return Arbiter.Choice(
/* Success, Attached to finger */
Arbiter.Receive(false, reloadDialog.Done, done => { }),
/* Loop detected */
Arbiter.Receive(false, m_forwarding.LoopedTrans, transId =>
{
if (transId == reloadSendMsg.TransactionID)
{
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_ERROR,
String.Format("Not re-sending transaction: {0:x16}=> a loopback detected!",
reloadSendMsg.TransactionID));
gotLoop = true;
m_forwarding.LoopedTrans = new Port<ulong>();
}
}));
if (gotLoop)
{
attachNext.Post(true);
yield break; ;
}
if (!reloadDialog.Error && reloadDialog.ReceivedMessage != null)
break;
// If a response has not been received when the timer fires, the request
// is retransmitted with the same transaction identifier.
--iRetrans;
if (iRetrans >= 0)
{
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_WARNING,
String.Format("Retrans {0} SendAttach via {1} TransId={2:x16}",
iRetrans, nextHopNode, reloadSendMsg.TransactionID));
m_ReloadConfig.Statistics.IncRetransmission();
}
else
{
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_ERROR,
String.Format("Failed! SendAttach via {0} TransId={1:x16}",
nextHopNode, reloadSendMsg.TransactionID));
m_ReloadConfig.Statistics.IncTransmissionError();
if (dest.destination_data.node_id != null)
m_topology.routing_table.SetNodeState(dest.destination_data.node_id,
NodeState.unknown);
}
// }
}
try
{
if (reloadDialog != null && !reloadDialog.Error &&
reloadDialog.ReceivedMessage != null)
{
/*the SourceNodeID delivered from reloadDialog comes from connection
* table and is the last hop of the message
*/
ReloadMessage reloadRcvMsg = reloadDialog.ReceivedMessage;
RELOAD_MessageCode msgCode = reloadRcvMsg.reload_message_body.RELOAD_MsgCode;
AttachReqAns answ = null;
if (msgCode == RELOAD_MessageCode.Attach_Answer)
{
answ = (AttachReqAns)reloadRcvMsg.reload_message_body;
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_TOPO,
String.Format("Finger-{0} <== {1} TransId={2:x16}",
msgCode.ToString().PadRight(16, ' '),
reloadRcvMsg.OriginatorID, reloadRcvMsg.TransactionID));
Node originator = new Node(reloadRcvMsg.OriginatorID, answ.ice_candidates);
NodeState nodeState = m_topology.routing_table.GetNodeState(originator.Id);
if (nodeState == NodeState.unknown)
{
attachNext.Post(true);
m_topology.routing_table.AddNode(originator);
m_topology.routing_table.SetNodeState(originator.Id, NodeState.attached);
m_topology.routing_table.AddFinger(originator, NodeState.attached);
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_USAGE,
String.Format("Got a finger! {0}", originator.Id));
}
/* we know this peer, further Attaches will return same peer */
else
attachNext.Post(false);
}
}
}
catch (Exception e)
{
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_ERROR,
String.Format("AttachFingers:" + e));
}
}
public IEnumerator<ITask> Send(Node node, ReloadMessage reloadMessage) // node is remote peer
{
ReloadConnectionTableEntry connectionTableEntry = null;
List<Byte[]> ByteArrayList = new List<byte[]>();
ByteArrayList.Add(reloadMessage.ToBytes());
//if (ReloadGlobals.FRAGMENTATION == true) {
if (reloadMessage.forwarding_header.length > ReloadGlobals.MAX_PACKET_BUFFER_SIZE * ReloadGlobals.MAX_PACKETS_PER_RECEIVE_LOOP)
{
if (ByteArrayList[0].Length > ReloadGlobals.FRAGMENT_SIZE)
{ //TODO: fragment size should not be fix
ByteArrayList.Clear();
ByteArrayList = reloadMessage.ToBytesFragmented(ReloadGlobals.FRAGMENT_SIZE);
}
}
foreach (byte[] ByteArray in ByteArrayList)
{
/* Try to find a matching connection using node id or target address*/
if (node.Id != null)
{
connectionTableEntry = connectionTable.lookupEntry(node.Id);
if (connectionTableEntry != null)
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_SOCKET, String.Format("FLM: Found open connection for target node id {0}", node.Id));
}
if (connectionTableEntry == null)
{
// connectionTableEntry == null => no connection to remote peer
List<IceCandidate> icecandidates = node.IceCandidates; // remote peer candidates
if (icecandidates != null)
{
foreach (IceCandidate candidate in icecandidates)
{
switch (candidate.addr_port.type)
{
case AddressType.IPv6_Address:
case AddressType.IPv4_Address:
{
ReloadSendParameters send_params;
// check if there is already a attempt to open a connection to this node
//if (connectionQueue.ContainsKey(candidate.addr_port))
if (connectionQueue.ContainsKey(candidate))
{
// here we have a connection attempt
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_WARNING, String.Format("Connection Pending!!!!!!!!!!!!!!!!!!!!!!!!!!!"));
//send_params = connectionQueue[candidate.addr_port];
send_params = connectionQueue[candidate];
yield return Arbiter.Receive(false, send_params.done, x => { });
send_params.done.Post(true); //maybe there are still some other pending connections?
if (send_params.connectionTableEntry != null) //do we have a valid connection?
{
// here we have a valid connection
connectionTableEntry = send_params.connectionTableEntry;
if (send_params.connectionTableEntry.NodeID != null) //TODO: correct?
node.Id = send_params.connectionTableEntry.NodeID;
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_WARNING, String.Format("DONE!!!!!!!!!!!!!!!!!!!!!!!!!!!"));
//connectionQueue.Remove(candidate.addr_port);
connectionQueue.Remove(candidate);
if (node.Id != null)
{
connectionTableEntry = connectionTable.lookupEntry(node.Id);
if (connectionTableEntry != null)
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_SOCKET, String.Format("FLM: Found open connection for target node id {0}", node.Id));
send_params = new ReloadSendParameters()
{
connectionTableEntry = connectionTableEntry,
destinationAddress = null,
port = 0,
buffer = ByteArray,
frame = true,
done = new Port<bool>(),
// markus
connectionSocket = null,
};
yield return Arbiter.ExecuteToCompletion(m_DispatcherQueue, new IterativeTask<Node, ReloadSendParameters>(node, send_params, link.Send)); // SEND
break;
}
}
// here we have no valid connection, but a connection attempt (maybe break?)
//break; // markus
}
// no connection attempt (maybe else here?)
// here is no existing connection and no attempt => try to connect
// NO ICE or ICE but bootstrap
if (ReloadGlobals.UseNoIce || candidate.cand_type == CandType.tcp_bootstrap)
{
connectionTableEntry = connectionTable.lookupEntry(new IPEndPoint(candidate.addr_port.ipaddr, candidate.addr_port.port));
if (connectionTableEntry != null)
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_TRANSPORT, String.Format("FLM: Found open connection for target IP {0}:{1}", candidate.addr_port.ipaddr, candidate.addr_port.port));
else
m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_TRANSPORT, String.Format("Opening connection to {0}:{1}", candidate.addr_port.ipaddr, candidate.addr_port.port));
send_params = new ReloadSendParameters()
{
connectionTableEntry = connectionTableEntry,
destinationAddress = candidate.addr_port.ipaddr,
port = candidate.addr_port.port,
buffer = ByteArray,
frame = true,
done = new Port<bool>(),
// markus
connectionSocket = null,
};
//send_params.done.Post(false);
//connectionQueue[candidate.addr_port] = send_params;
connectionQueue[candidate] = send_params;
//m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_INFO, String.Format("Insert {0}:{1} into connectionQueue", new IPAddress(send_params.destinationAddress.Address).ToString(), send_params.port));
yield return Arbiter.ExecuteToCompletion(m_DispatcherQueue, new IterativeTask<Node, ReloadSendParameters>(node, send_params, link.Send)); // SEND
//connectionQueue.Remove(candidate.addr_port);
connectionQueue.Remove(candidate);
if (send_params.connectionTableEntry != null)
{
connectionTableEntry = send_params.connectionTableEntry; //TODO: not nice but does the trick
if (send_params.connectionTableEntry.NodeID != null) //TODO: correct?
node.Id = send_params.connectionTableEntry.NodeID;
}
}
// ICE peer
//else
//{
// connectionTableEntry = connectionTable.lookupEntry(new IPEndPoint(candidate.addr_port.ipaddr, candidate.addr_port.port));
// if (connectionTableEntry != null)
// m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_TRANSPORT, String.Format("FLM: Found open connection for target IP {0}:{1}", candidate.addr_port.ipaddr, candidate.addr_port.port));
// else
// m_ReloadConfig.Logger(ReloadGlobals.TRACEFLAGS.T_TRANSPORT, String.Format("Opening connection to {0}:{1}", candidate.addr_port.ipaddr, candidate.addr_port.port));
// // try to get connection
// Socket connectionSocket = null;
// m_connectionsToRemotePeer.TryGetValue(candidate.addr_port, out connectionSocket);
// //if (connectionSocket == null)
// // continue; //versuche mit nächsten candidate
// send_params = new ReloadSendParameters()
// {
// connectionTableEntry = connectionTableEntry,
// destinationAddress = candidate.addr_port.ipaddr,
// port = candidate.addr_port.port,
// buffer = ByteArray,
// frame = true,
// done = new Port<bool>(),
// // markus
// connectionSocket = connectionSocket,
// };
// //send_params.done.Post(false);
// connectionQueue[candidate.addr_port] = send_params;
// yield return Arbiter.ExecuteToCompletion(m_DispatcherQueue, new IterativeTask<Node, ReloadSendParameters>(node, send_params, link.Send)); // SEND
// connectionQueue.Remove(candidate.addr_port);
// if (send_params.connectionTableEntry != null)
// {
// connectionTableEntry = send_params.connectionTableEntry; //TODO: not nice but does the trick
// if (send_params.connectionTableEntry.NodeID != null) //TODO: correct?
// node.Id = send_params.connectionTableEntry.NodeID;
// }
//}
}
break;
}
//just support one ice candidate only here
break;
} // foreach ice candidate
}
}
else
{
// connectionTableEntry != null => existing connection to remote peer
ReloadSendParameters send_params = new ReloadSendParameters()
{
connectionTableEntry = connectionTableEntry,
destinationAddress = null,
port = 0,
buffer = ByteArray,
frame = true,
done = new Port<bool>(),
};
yield return Arbiter.ExecuteToCompletion(m_DispatcherQueue, new IterativeTask<Node, ReloadSendParameters>(node, send_params, link.Send)); // SEND
}
} // foreach ByteArray
yield break;
} // Send
public IEnumerator<ITask> Send(Node node, ReloadMessage reloadMessage) {
if (m_ReloadConfig.State < ReloadConfig.RELOAD_State.Exit)
Arbiter.Activate(m_ReloadConfig.DispatcherQueue, new IterativeTask<Node, byte[]>(node, reloadMessage.ToBytes(), link.Send));
yield break;
}