protected void FriendPing(string address)
{
Address addr = AddressParser.Parse(address);
Channel q = new Channel();
q.CloseAfterEnqueue();
q.CloseEvent += delegate(object obj, EventArgs eargs) {
try {
RpcResult res = (RpcResult)q.Dequeue();
string result = (string)res.Result;
string[] parts = result.Split(DELIM);
string dht_key = parts[0];
string response = parts[1];
if (response == "online")
{
SocialUser friend = _friends[dht_key];
friend.Time = DateTime.Now.ToString();
}
ProtocolLog.Write(SocialLog.SVPNLog, "PING FRIEND REPLY: " +
result);
} catch (Exception e) {
ProtocolLog.Write(SocialLog.SVPNLog, e.Message);
ProtocolLog.Write(SocialLog.SVPNLog, "PING FRIEND FAILURE: " +
address);
}
};
ISender sender = new AHExactSender(_node, addr);
_rpc.Invoke(sender, q, "SocialVPN.FriendPing", _local_user.DhtKey);
}
protected void SendControlPacket(EndPoint end, int remoteid, int localid,
ControlCode c, object state)
{
using (MemoryStream ms = new MemoryStream()) {
NumberSerializer.WriteInt((int)c, ms);
if (c == ControlCode.EdgeDataAnnounce)
{
UdpEdge e = (UdpEdge)_id_ht[localid];
if ((e != null) && (e.RemoteID == remoteid))
{
Hashtable t = new Hashtable();
t["RemoteTA"] = e.RemoteTA.ToString();
t["LocalTA"] = e.LocalTA.ToString();
AdrConverter.Serialize(t, ms);
}
else
{
if (ProtocolLog.UdpEdge.Enabled)
{
ProtocolLog.Write(ProtocolLog.UdpEdge, String.Format(
"Problem sending EdgeData: EndPoint: {0}, remoteid: {1}, " +
"localid: {2}, Edge: {3}", end, remoteid, localid, e));
}
}
}
_send_queue.Enqueue(new UdpMessage(localid, ~remoteid, MemBlock.Reference(ms.ToArray()), end));
if (ProtocolLog.UdpEdge.Enabled)
{
ProtocolLog.Write(ProtocolLog.UdpEdge, String.Format(
"Sending control {1} to: {0}", end, c));
}
}
}
/**
* Add local certificate to the DHT.
*/
public void PublishCertificate()
{
byte[] key_bytes = Encoding.UTF8.GetBytes(_local_user.DhtKey);
MemBlock keyb = MemBlock.Reference(key_bytes);
MemBlock value = MemBlock.Reference(_local_cert.X509.RawData);
Channel q = new Channel();
q.CloseAfterEnqueue();
q.CloseEvent += delegate(Object o, EventArgs eargs) {
try {
bool success = (bool)(q.Dequeue());
if (success)
{
ProtocolLog.Write(SocialLog.SVPNLog, "PUBLISH CERT SUCCESS: " +
_local_user.DhtKey);
}
} catch (Exception e) {
ProtocolLog.Write(SocialLog.SVPNLog, e.Message);
ProtocolLog.Write(SocialLog.SVPNLog, "PUBLISH CERT FAILURE: " +
_local_user.DhtKey);
}
};
this.Dht.AsPut(keyb, value, DHTTTL, q);
}
public override void Start()
{
//Make sure the Node is listening to this node
try {
//This will throw an exception if _e is already closed:
_e.CloseEvent += this.CloseHandler;
//_e must not be closed, let's start listening to it:
_e.Subscribe(_node, _e);
/* Make the call */
Channel results = new Channel();
results.CloseAfterEnqueue();
results.CloseEvent += this.LinkCloseHandler;
RpcManager rpc = _node.Rpc;
if (ProtocolLog.LinkDebug.Enabled)
{
ProtocolLog.Write(ProtocolLog.LinkDebug,
String.Format("LPS target: {0} Invoking Start() over edge: {1}", _linker.Target, _e));
}
rpc.Invoke(_e, results, "sys:link.Start", MakeLM().ToDictionary());
}
catch (Exception e) {
//The Edge must have closed, move on to the next TA
if (ProtocolLog.LinkDebug.Enabled)
{
ProtocolLog.Write(ProtocolLog.LinkDebug,
String.Format("LPS target: {0} Start() over edge: {1}, hit exception: {2}",
_linker.Target, _e, e));
}
Finish(Result.MoveToNextTA);
}
}
/**
* Add friend by retreiving certificate from DHT.
* @param key the DHT key for friend's certificate.
*/
public void AddDhtFriend(string key)
{
if (key == _local_user.DhtKey || _friends.ContainsKey(key))
{
if (key != _local_user.DhtKey)
{
_srh.PingFriend(_friends[key]);
}
return;
}
Channel q = new Channel();
q.CloseAfterEnqueue();
q.CloseEvent += delegate(Object o, EventArgs eargs) {
try {
DhtGetResult dgr = (DhtGetResult)q.Dequeue();
byte[] certData = dgr.value;
AddCertificate(certData, key);
ProtocolLog.Write(SocialLog.SVPNLog, "ADD DHT SUCCESS: " +
key);
} catch (Exception e) {
ProtocolLog.Write(SocialLog.SVPNLog, e.Message);
ProtocolLog.Write(SocialLog.SVPNLog, "ADD DHT FAILURE: " +
key);
}
};
this.Dht.AsGet(key, q);
}
/// <summary>This helps us leave the Get early if we either have no results or
/// our remaining results will not reach a majority due to too many nodes
/// missing data. This closes the clients returns queue.</summary>
/// <param name="adgs">The AsDhtGetState to qualify for leaving early</param>
protected void GetLeaveEarly(AsDhtGetState adgs)
{
int left = adgs.queueMapping.Count;
// Maybe we can leave early
bool got_all_values = true;
foreach (DictionaryEntry de in adgs.results)
{
int val = ((Hashtable)de.Value).Count;
if (val < MAJORITY && ((val + left) >= MAJORITY))
{
got_all_values = false;
break;
}
}
// If we got to leave early, we must clean up
if (got_all_values)
{
if (Dht.DhtLog.Enabled)
{
ProtocolLog.Write(Dht.DhtLog, String.Format(
"GetLeaveEarly found:left:total = {0}:{1}:{2}",
adgs.results.Count, left, DEGREE));
}
adgs.returns.Close();
adgs.GotToLeaveEarly = true;
}
}
public void Start()
{
try {
//This edge could have been closed, which will
//cause the Rpc to throw an exception
Node.CallGetStatus(ConType, Neighbor);
}
catch (EdgeClosedException) {
//Just ignore this connection if it is closed
}
catch (EdgeException ex) {
if (!ex.IsTransient)
{
//Make sure this Edge is closed before going forward
//@TODO this is not safe, EdgeException should keep a ref to the edge that threw
Neighbor.State.Edge.Close();
}
}
catch (Exception x) {
if (ProtocolLog.Exceptions.Enabled)
{
ProtocolLog.Write(ProtocolLog.Exceptions, String.Format(
"CallGetStatus() on {0} failed: {1}", Neighbor, x));
}
}
}
/**
* <summary>Disk caching is unsupported at this time.</summary>
*/
/* When we have a cache eviction, we must write it to disk, we take
* each entry, convert it explicitly into a hashtable, and then use adr
* to create a stream and write it to disk
*/
public void CacheEviction(Object o, EventArgs args)
{
Brunet.Collections.Cache.EvictionArgs eargs = (Brunet.Collections.Cache.EvictionArgs)args;
MemBlock key = (MemBlock)eargs.Key;
if (Dht.DhtLog.Enabled)
{
ProtocolLog.Write(Dht.DhtLog, String.Format(
"Evicted out of cache {0}, entries in dht {1}, entries in cache {2}",
(new BigInteger(key)).ToString(16), Count, _data.Count));
}
if (eargs.Value != null && ((LinkedList <Entry>)eargs.Value).Count > 0)
{
LinkedList <Entry> data = (LinkedList <Entry>)eargs.Value;
// AdrConverter doesn't support LinkedLists
Entry[] entries = new Entry[data.Count];
data.CopyTo(entries, 0);
Hashtable[] ht_entries = new Hashtable[entries.Length];
int index = 0;
foreach (Entry entry in entries)
{
ht_entries[index++] = (Hashtable)entry;
}
string dir_path, filename;
string file_path = GeneratePath(key, out dir_path, out filename);
if (!Directory.Exists(dir_path))
{
Directory.CreateDirectory(dir_path);
}
using (FileStream fs = File.Open(file_path, FileMode.Create)) {
AdrConverter.Serialize(ht_entries, fs);
}
}
}
/**
* Disconnect from the network.
*/
public void Disconnect()
{
if (ProtocolLog.NodeLog.Enabled)
{
ProtocolLog.Write(ProtocolLog.NodeLog, String.Format(
"Called Node.Disconnect: {0}", this.Address));
}
bool changed_state = false;
try {
SetConState(Node.ConnectionState.Leaving, out changed_state);
if (changed_state)
{
ProtocolLog.WriteIf(ProtocolLog.NodeLog, String.Format(
"[Connect: {0}] deactivating task queue", _local_add));
_task_queue.IsActive = false;
Interlocked.Exchange(ref _send_pings, 0);
_connection_table.Close();
}
}
finally {
if (changed_state)
{
SendStateChange(Node.ConnectionState.Leaving);
}
}
}
protected void SendThread()
{
byte[] buffer = new byte[8 + Int16.MaxValue];
bool timedout = false;
while (_running == 1)
{
UdpMessage to_send = _send_queue.Dequeue(-1, out timedout);
if (to_send == null)
{
break;
}
NumberSerializer.WriteInt(to_send.LocalID, buffer, 0);
NumberSerializer.WriteInt(to_send.RemoteID, buffer, 4);
try {
int length = to_send.Data.CopyTo(buffer, 8);
_s.SendTo(buffer, 8 + length, SocketFlags.None, to_send.Dst);
} catch (SocketException x) {
if ((1 == _running) && ProtocolLog.UdpEdge.Enabled)
{
ProtocolLog.Write(ProtocolLog.UdpEdge, x.ToString());
}
}
}
}
public List <string> GetFingerprints(string uid)
{
if (_online)
{
return(_provider.GetFingerprints(uid));
}
List <string> fingerprints = new List <string>();
DhtGetResult[] dgrs = null;
string key = DHTPREFIX + uid;
try {
dgrs = _dht.Get(key);
} catch (Exception e) {
ProtocolLog.Write(SocialLog.SVPNLog, e.Message);
ProtocolLog.Write(SocialLog.SVPNLog, "DHT GET FPR FAILURE: " + key);
}
foreach (DhtGetResult dgr in dgrs)
{
fingerprints.Add(dgr.valueString);
}
return(fingerprints);
}
public override void Reduce(Channel q, object reduce_arg,
object current_result, RpcResult child_rpc)
{
bool done = false;
ISender child_sender = child_rpc.ResultSender;
//the following can throw an exception, will be handled by the framework
object child_result = child_rpc.Result;
//child result is a valid result
if (current_result == null)
{
q.Enqueue(new Brunet.Collections.Pair <object, bool>(child_result, done));
return;
}
ArrayList retval = current_result as ArrayList;
IDictionary my_entry = (IDictionary)retval[0];
my_entry["next_con"] = child_sender.ToUri();
retval.AddRange((IList)child_result);
if (LogEnabled)
{
ProtocolLog.Write(ProtocolLog.MapReduce,
String.Format("{0}: {1}, reduce list count: {2}.", this.TaskName, _node.Address, retval.Count));
}
q.Enqueue(new Brunet.Collections.Pair <object, bool>(retval, done));
}
/// <summary>Called by HandleIPOut if the current packet has a Multicast
/// address in its destination field. This sends the multicast packet
/// to all members of the multicast group stored in the dht.</summary>
/// <param name="ipp">The IP Packet destined for multicast.</param>
/// <returns>This returns true since this is implemented.</returns>
protected override bool HandleMulticast(IPPacket ipp)
{
if (!_ipop_config.EnableMulticast)
{
return(true);
}
WaitCallback wcb = delegate(object o) {
Hashtable[] results = null;
try {
results = AppNode.Dht.Get(Encoding.UTF8.GetBytes(_ipop_config.IpopNamespace + ".multicast.ipop"));
} catch {
return;
}
foreach (Hashtable result in results)
{
try {
AHAddress target = (AHAddress)AddressParser.Parse(Encoding.UTF8.GetString((byte[])result["value"]));
if (IpopLog.PacketLog.Enabled)
{
ProtocolLog.Write(IpopLog.PacketLog, String.Format(
"Brunet destination ID: {0}", target));
}
SendIP(target, ipp.Packet);
}
catch {}
}
};
ThreadPool.QueueUserWorkItem(wcb, ipp);
return(true);
}
/**
* Checks if the shortcut connection is still optimal, and trims it if not optimal.
* @param random_target random target pointing to the start of the range for connection candidates.
* @param score_table candidate addresses sorted by scores.
* @param sc_address address of the current connection.
*/
protected void CheckShortcutCallback(Address random_target, SortedList score_table, Address sc_address)
{
if (LogEnabled)
{
ProtocolLog.Write(ProtocolLog.SCO,
String.Format("SCO local: {0}, Checking shortcut optimality: {1}.",
_node.Address, sc_address));
}
int max_rank = (int)Math.Ceiling(0.2 * score_table.Count);
if (!IsConnectionOptimal(sc_address, score_table, max_rank))
{
Address min_target = (Address)score_table.GetByIndex(0);
//find the connection and trim it.
Connection to_trim = null;
foreach (Connection c in _node.ConnectionTable.GetConnections(STRUC_SHORT))
{
string token = c.PeerLinkMessage.Token;
if (token == null || token == String.Empty)
{
continue;
}
// First half of the token should be the connection initiator
string initiator_address = token.Substring(0, token.Length / 2);
if (initiator_address == _node.Address.ToString() && c.Address.Equals(sc_address))
{
to_trim = c;
break;
}
}
if (to_trim != null)
{
if (LogEnabled)
{
ProtocolLog.Write(ProtocolLog.SCO,
String.Format("SCO local: {0}, Trimming shortcut : {1}, min_target: {2}.",
_node.Address, to_trim.Address, min_target));
}
lock (_sync) {
double total_secs = (DateTime.UtcNow - to_trim.CreationTime).TotalSeconds;
_sum_con_lifetime += total_secs;
_trim_count++;
}
_node.GracefullyClose(to_trim.Edge);
}
}
else
{
if (LogEnabled)
{
ProtocolLog.Write(ProtocolLog.SCO,
String.Format("SCO local: {0}, Shortcut is optimal: {1}.",
_node.Address, sc_address));
}
}
}
protected void Log(string format_string, params object[] format_args)
{
if (LogEnabled)
{
string s = String.Format(format_string, format_args);
ProtocolLog.Write(ProtocolLog.MapReduce,
String.Format("{0}: {1}, {2}", _node.Address, this.GetType(), s));
}
}
/**
* This just echos back the object passed to it
*/
public object Ping(object o, ISender edge)
{
if (ProtocolLog.LinkDebug.Enabled)
{
ProtocolLog.Write(ProtocolLog.LinkDebug, String.Format(
"{0} sys:link.Ping({1},{2})", _node.Address, o, edge));
}
return(o);
}
private void PostEvent(Events.EventInfo eventInfo)
{
lock (_events)
{
_events.Enqueue(eventInfo);
_eventReceived.Set();
}
ProtocolLog.Write(eventInfo);
}
/**
<summary>The _listen_threads method, reads from sockets and let's the node
handle the incoming data.</summary>
*/
protected void Listen() {
if (Thread.CurrentThread.Name == null) {
Thread.CurrentThread.Name = "iphandler_thread";
}
ArrayList sockets = new ArrayList();
sockets.Add(_uc);
if(_mc != null) {
sockets.Add(_mc);
}
byte[] buffer = new byte[Int16.MaxValue];
DateTime last_debug = DateTime.UtcNow;
TimeSpan debug_period = TimeSpan.FromSeconds(5);
while(1 == _running) {
if (ProtocolLog.Monitor.Enabled) {
DateTime now = DateTime.UtcNow;
if (now - last_debug > debug_period) {
last_debug = now;
ProtocolLog.Write(ProtocolLog.Monitor, String.Format("I am alive: {0}", now));
}
}
try {
ArrayList readers = (ArrayList) sockets.Clone();
Socket.Select(readers, null, null, 10000000); //10 seconds
foreach(Socket socket in readers) {
EndPoint ep = new IPEndPoint(IPAddress.Any, 0);
int rec_bytes = socket.ReceiveFrom(buffer, ref ep);
Subscriber s = _sub;
//s can't change once we've read it.
if( s != null && rec_bytes > 0) {
MemBlock packet = MemBlock.Copy(buffer, 0, rec_bytes);
MemBlock cookie = packet.Slice(0, 4);
if(cookie.Equals(MagicCookie)) {
packet = packet.Slice(4);
ISender sender = CreateUnicastSender(ep);
s.Handle(packet, sender);
}
}
}
}
catch(ObjectDisposedException odx) {
//If we are no longer running, this is to be expected.
if(1 == _running) {
//If we are running print it out
ProtocolLog.WriteIf(ProtocolLog.Exceptions, odx.ToString());
}
break;
}
catch(Exception x) {
if(0 == _running) {
ProtocolLog.WriteIf(ProtocolLog.Exceptions, x.ToString());
}
}
}
}
/**
* Update the ReadSocks and ErrorSocks to see which sockets might be
* ready for reading or need closing.
*/
public void Select()
{
ReadSocks.Clear();
ErrorSocks.Clear();
WriteSocks.Clear();
ReadSocks.AddRange(AllSockets);
//Also listen for incoming connections:
ReadSocks.Add(ListenSock);
/*
* POB: I cannot find any documentation on what, other than
* out-of-band data, might be signaled with these. As such
* I am commenting them out. If we don't see a reason to put
* it back soon, please delete ErrorSocks from the code.
* 11/19/2008
* ErrorSocks.AddRange(AllSockets);
*/
//Here we do non-blocking connecting:
WriteSocks.AddRange(_con_socks);
//Here we add the sockets that are waiting to write:
WriteSocks.AddRange(_socks_to_send);
//An error signals that the connection failed
ErrorSocks.AddRange(_con_socks);
/*
* Now we are ready to do our select and we only act on local
* variables
*/
try {
//Socket.Select(ReadSocks, null, ErrorSocks, TIMEOUT_MS * 1000);
Socket.Select(ReadSocks, WriteSocks, ErrorSocks, TIMEOUT_MS * 1000);
//Socket.Select(ReadSocks, null, null, TIMEOUT_MS * 1000);
}
catch (System.ObjectDisposedException) {
/*
* This happens if one of the edges is closed while
* a select call is in progress. This is not weird,
* just ignore it
*/
ReadSocks.Clear();
ErrorSocks.Clear();
WriteSocks.Clear();
}
catch (Exception x) {
/*
* There could be an OS error, in principle. If this
* happens, log it, and just sleep for the period of time
* we would have waited (to prevent us from spinning in
* this thread).
*/
ProtocolLog.Write(ProtocolLog.Exceptions, x.ToString());
Thread.Sleep(TIMEOUT_MS);
}
}
/**
* When we're here, we have the status message
*/
protected void StatusCloseHandler(object q, EventArgs args)
{
try {
Channel resq = (Channel)q;
//If we got no result
RpcResult res = (RpcResult)resq.Dequeue();
StatusMessage sm = new StatusMessage((IDictionary)res.Result);
if (_node.EdgeVerifyMethod != null)
{
if (!_node.EdgeVerifyMethod(_node, _e, LinkMessageReply.Local.Address))
{
throw new Exception("Edge verification failed!");
}
}
Connection c = new Connection(_e, LinkMessageReply.Local.Address,
_contype, sm, LinkMessageReply);
_node.ConnectionTable.Add(c);
_con.Value = c;
Finish(Result.Success);
}
catch (InvalidOperationException) {
/*
* This is unexpected.
*/
string message = String.Format(
"No StatusMessage returned from open({1}) Edge: {0}",
_e, !_e.IsClosed);
if (ProtocolLog.LinkDebug.Enabled)
{
ProtocolLog.Write(ProtocolLog.LinkDebug, message);
}
/*
* We got a link message from this guy, but not a status response,
* so let's try this TA again.
*/
Finish(Result.RetryThisTA);
}
catch (Exception x) {
/*
* Clearly we got some response from this edge, but something
* unexpected happened. Let's try it this edge again if we
* can
*/
if (ProtocolLog.LinkDebug.Enabled)
{
ProtocolLog.Write(ProtocolLog.LinkDebug, String.Format(
"LPS.StatusResultHandler Exception: {0}", x));
}
Finish(Result.RetryThisTA);
}
}
/**
* Checks if we have the optimal bypass connection, and trims the ones that are unnecessary.
* @param start random target pointing to the start of the range for connection candidates.
* @param score_table candidate addresses sorted by scores.
* @param bp_address address of the current connection (nullable).
*/
protected void CheckBypassCallback(Address start, SortedList score_table, Address bp_address)
{
if (ProtocolLog.SCO.Enabled)
{
ProtocolLog.Write(ProtocolLog.SCO,
String.Format("SCO local: {0}, Checking bypass optimality.",
_node.Address));
}
ArrayList bypass_cons = new ArrayList();
foreach (Connection c in _node.ConnectionTable.GetConnections(STRUC_BYPASS))
{
string token = c.State.PeerLinkMessage.Token;
if (token == null || token.Equals(_node.Address.ToString()))
{
continue;
}
bypass_cons.Add(c);
}
int max_rank = bypass_cons.Count > 1 ? 0: (int)Math.Ceiling(0.2 * score_table.Count);
foreach (Connection bp in bypass_cons)
{
if (!IsConnectionOptimal(bp.Address, score_table, max_rank))
{
Address min_target = (Address)score_table.GetByIndex(0);
#if TRACE
if (ProtocolLog.SCO.Enabled)
{
ProtocolLog.Write(ProtocolLog.SCO,
String.Format("SCO local: {0}, Trimming bypass : {1}, min_target: {2}.",
_node.Address, bp.Address, min_target));
}
#endif
lock (_sync) {
double total_secs = (DateTime.UtcNow - bp.CreationTime).TotalSeconds;
_sum_con_lifetime += total_secs;
_trim_count++;
}
bp.Close(_node.Rpc, String.Empty);
#if TRACE
}
else if (ProtocolLog.SCO.Enabled)
{
ProtocolLog.Write(ProtocolLog.SCO,
String.Format("SCO local: {0}, Bypass is optimal: {1}.",
_node.Address, bp));
#endif
}
}
}
/**
* Initiates creation of a bypass connection.
*
*/
protected void CreateBypass()
{
if (LogEnabled)
{
ProtocolLog.Write(ProtocolLog.SCO,
String.Format("SCO local: {0}, Selecting bypass to create.",
_node.Address));
}
double logk = Math.Log((double)_node.NetworkSize, 2.0);
_target_selector.ComputeCandidates(_node.Address, (int)Math.Ceiling(logk), CreateBypassCallback, null);
}
public override void Start(SocketState ss)
{
DateTime now = DateTime.UtcNow;
if (now - _last_debug > _debug_period)
{
_last_debug = now;
ProtocolLog.Write(ProtocolLog.Monitor, String.Format("I am alive: {0}", now));
}
//Run ourselves again later.
_q.Enqueue(this);
}
/**
* Timer event handler.
* @param obj the default object.
*/
public void TimerHandler(Object obj)
{
try {
UpdateFriends();
_snode.PublishCertificate();
_timer_thread.Change(INTERVALTIME, INTERVALTIME);
} catch (Exception e) {
_timer_thread.Change(INTERVALTIME, INTERVALTIME);
ProtocolLog.Write(SocialLog.SVPNLog, e.Message);
ProtocolLog.Write(SocialLog.SVPNLog, "TIMER HANDLER FAILURE " +
DateTime.Now.ToString());
}
}
/// <summary>Sends the IP Packet to the specified target address.</summary>
/// <param name="target"> the Brunet Address of the target</param>
/// <param name="packet"> the data to send to the recepient</param>
protected virtual void SendIP(Address target, MemBlock packet)
{
if (!_conn_handler.Send(target, packet))
{
if (IpopLog.PacketLog.Enabled)
{
IPPacket ipp = new IPPacket(packet);
ProtocolLog.Write(IpopLog.PacketLog, String.Format(
"No connection to destination (IP / P2P): {0} / {1}",
ipp.SourceIP, target));
}
}
}
/// <summary>This is the asynchronous callback for Miss. This contains the
/// lookup results from the Dht. If there is a valid mapping it is added to
/// the cache. Either way, new queries can now be run for the IP address
/// after the completion of this method.</summary>
/// <param name="o">Contains the Channel where the results are stored.</param>
/// <param name="args">Null.</param>
protected void MissCallback(Object o, EventArgs args)
{
Channel queue = (Channel)o;
// Requires synchronized reading
MemBlock ip = null;
lock (_sync) {
ip = _mapping[queue];
}
String ips = Utils.MemBlockToString(ip, '.');
Address addr = null;
try {
Hashtable dgr = (Hashtable)queue.Dequeue();
addr = AddressParser.Parse(Encoding.UTF8.GetString((byte[])dgr["value"]));
if (IpopLog.ResolverLog.Enabled)
{
ProtocolLog.Write(IpopLog.ResolverLog, String.Format(
"Got result for {0} ::: {1}.", ips, addr));
}
} catch {
if (IpopLog.ResolverLog.Enabled)
{
ProtocolLog.Write(IpopLog.ResolverLog, String.Format(
"Failed for {0}.", Utils.MemBlockToString(ip, '.')));
}
}
lock (_sync) {
if (addr != null)
{
_verified_cache.Update(ip, addr);
_attempts.Remove(ip);
}
_queued.Remove(ip);
_mapping.Remove(queue);
}
if (addr == null)
{
var handler = MissedMapping;
if (handler != null)
{
if (_incoming_cache.TryGetValue(ip, out addr))
{
handler(ips, addr);
}
}
}
}
protected void ListenThread()
{
Thread.CurrentThread.Name = "udp_listen_thread";
BufferAllocator ba = new BufferAllocator(8 + Int16.MaxValue);
EndPoint end = new IPEndPoint(IPAddress.Any, 0);
int rec_bytes = 0;
MonitorLogSwitch();
ProtocolLog.Monitor.SwitchedSetting += MonitorLogSwitch;
while (1 == _running)
{
int max = ba.Capacity;
try {
rec_bytes = _s.ReceiveFrom(ba.Buffer, ba.Offset, max,
SocketFlags.None, ref end);
} catch (SocketException x) {
if ((1 == _running) && ProtocolLog.UdpEdge.Enabled)
{
ProtocolLog.Write(ProtocolLog.UdpEdge, x.ToString());
}
}
if (rec_bytes < 8)
{
continue;
}
int remoteid = NumberSerializer.ReadInt(ba.Buffer, ba.Offset);
int localid = NumberSerializer.ReadInt(ba.Buffer, ba.Offset + 4);
MemBlock packet_buffer = MemBlock.Reference(ba.Buffer, ba.Offset + 8, rec_bytes - 8);
ba.AdvanceBuffer(rec_bytes);
if (localid < 0)
{
// Negative ids are control messages
HandleControlPacket(remoteid, localid, packet_buffer, end);
}
else
{
HandleDataPacket(remoteid, localid, packet_buffer, end, null);
}
}
ProtocolLog.Monitor.SwitchedSetting -= MonitorLogSwitch;
//Let everyone know we are out of the loop
_listen_finished_event.Set();
_s.Close();
//Allow garbage collection
_s = null;
}
protected void CreateBypassCallback(Address start, SortedList score_table, Address current)
{
if (score_table.Count > 0)
{
Address min_target = (Address)score_table.GetByIndex(0);
if (LogEnabled)
{
ProtocolLog.Write(ProtocolLog.SCO,
String.Format("SCO local: {0}, Connecting (bypass) to min_target: {1}",
_node.Address, min_target));
}
ConnectTo(min_target, STRUC_BYPASS);
}
}
/** Starts the computation. */
public void Start()
{
//invoke map
try {
Channel map_res = new Channel(1);
map_res.CloseEvent += this.MapHandler;
if (LogEnabled)
{
ProtocolLog.Write(ProtocolLog.MapReduce,
String.Format("MapReduce: {0}, about to call Map", _node.Address));
}
_mr_task.Map(map_res, _mr_args.MapArg);
}
catch (Exception x) {
//Simulate the above except with the Exception enqueued
if (LogEnabled)
{
ProtocolLog.Write(ProtocolLog.MapReduce,
String.Format("MapReduce: {0}, Exception in Map: {1}", _node.Address, x));
}
HandleException(null, x);
}
if (_state.Done)
{
return;
}
/* Our local Map was not enough
* to finish the computation, look
* for children
*/
try {
Channel gentree_res = new Channel(1);
gentree_res.CloseEvent += this.GenTreeHandler;
if (LogEnabled)
{
ProtocolLog.Write(ProtocolLog.MapReduce,
String.Format("MapReduce: {0}, about to call GenerateTree", _node.Address));
}
_mr_task.GenerateTree(gentree_res, _mr_args);
}
catch (Exception x) {
if (LogEnabled)
{
ProtocolLog.Write(ProtocolLog.MapReduce,
String.Format("MapReduce: {0}, Exception in GenerateTree: {1}", _node.Address, x));
}
HandleException(null, x);
}
}
override public void Set(Address addr)
{
if (!_cache.Update(addr, true))
{
return;
}
if (ProtocolLog.PolicyBasedCO.Enabled)
{
ProtocolLog.Write(ProtocolLog.PolicyBasedCO, String.Format(
"Set: {0} at {1}", addr, DateTime.UtcNow));
}
ConnectTo(addr);
}