private static IceCandidate GatherSRPassiveCandidate(IPAddress localIPAddress)
{
// local endpoint
IPEndPoint localEndpoint = new IPEndPoint(localIPAddress, 0);
// listening socket
Socket passiveListeningSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
passiveListeningSocket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true);
passiveListeningSocket.Bind(localEndpoint);
// update localEndpoint with binded Port
localEndpoint = (IPEndPoint)passiveListeningSocket.LocalEndPoint;
// STUN socket
Socket passiveSTUNSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
passiveSTUNSocket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true);
passiveSTUNSocket.Bind(localEndpoint);
// get defined STUN servers
List<IPEndPoint> definedSTUNServers = GetDefinedSTUNServers();
// servers defined?
if (definedSTUNServers.Count > 0)
{
// use first server
IPEndPoint STUNEndPoint = definedSTUNServers[0];
// try to connect
try
{
passiveSTUNSocket.Connect(STUNEndPoint);
}
catch (Exception e1)
{
//Console.WriteLine(e1.Message);
// use second STUN server, if defined
if (definedSTUNServers.Count == 2)
{
STUNEndPoint = definedSTUNServers[1];
// try to connect
try
{
passiveSTUNSocket.Connect(STUNEndPoint);
}
catch (Exception e2)
{
//Console.WriteLine(e2.Message);
// could not establish a connection to a STUN server
return null;
}
}
}
}
// no STUN servers defined
else
return null;
// get public mapping
IPEndPoint publicMapping = GetPublicMapping(passiveSTUNSocket);
// save data in candidate object
IpAddressPort passiveIpAddressPort = new IpAddressPort(AddressType.IPv4_Address, publicMapping.Address, (ushort)publicMapping.Port);
IceCandidate passiveCandidate = new IceCandidate(passiveIpAddressPort, Overlay_Link.TLS_TCP_with_FH);
passiveCandidate.cand_type = CandType.tcp_srflx;
passiveCandidate.rel_addr_port = new IpAddressPort(AddressType.IPv4_Address, localEndpoint.Address, (ushort)localEndpoint.Port);
passiveCandidate.passiveListeningSocket = passiveListeningSocket;
passiveCandidate.passiveSTUNSocket = passiveSTUNSocket;
// TCP Type
passiveCandidate.tcpType = TcpType.Passive;
// TCP ICE extension
IceExtension iceExtension = new IceExtension();
iceExtension.name = Encoding.UTF8.GetBytes("tcptype");
iceExtension.value = Encoding.UTF8.GetBytes("passive");
passiveCandidate.extension_list.Add(iceExtension);
return passiveCandidate;
}
private static IceCandidate GatherHostPassiveCandidate(IPAddress localIPAddress)
{
// local endpoint
IPEndPoint localEndpoint = new IPEndPoint(localIPAddress, 0);
Socket passiveListeningSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
passiveListeningSocket.Bind(localEndpoint);
// update localEndpoint with binded Port
localEndpoint = (IPEndPoint)passiveListeningSocket.LocalEndPoint;
// save data in candidate object
IpAddressPort passiveIpAddressPort = new IpAddressPort(AddressType.IPv4_Address, localEndpoint.Address, (ushort)localEndpoint.Port);
IceCandidate passiveCandidate = new IceCandidate(passiveIpAddressPort, Overlay_Link.TLS_TCP_with_FH);
passiveCandidate.cand_type = CandType.tcp_host;
passiveCandidate.passiveListeningSocket = passiveListeningSocket;
// TCP Type
passiveCandidate.tcpType = TcpType.Passive;
// TCP ICE extension
IceExtension iceExtension = new IceExtension();
iceExtension.name = Encoding.UTF8.GetBytes("tcptype");
iceExtension.value = Encoding.UTF8.GetBytes("passive");
passiveCandidate.extension_list.Add(iceExtension);
return passiveCandidate;
}
private static IceCandidate GatherHostSOCandidate(IPAddress localIPAddress)
{
// local endpoint
IPEndPoint localEndpoint = new IPEndPoint(localIPAddress, 0);
// listening socket
Socket soListeningSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
soListeningSocket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true);
soListeningSocket.Bind(localEndpoint);
// update localEndpoint with binded Port
localEndpoint = (IPEndPoint)soListeningSocket.LocalEndPoint;
// connecting socket
Socket soConnectingSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
soConnectingSocket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true);
soConnectingSocket.Bind(localEndpoint);
// save data in candidate object
IpAddressPort soIpAddressPort = new IpAddressPort(AddressType.IPv4_Address, localEndpoint.Address, (ushort)localEndpoint.Port);
IceCandidate soCandidate = new IceCandidate(soIpAddressPort, Overlay_Link.TLS_TCP_with_FH);
soCandidate.cand_type = CandType.tcp_host;
soCandidate.soListeningSocket = soListeningSocket;
soCandidate.soConnectingSocket = soConnectingSocket;
// TCP Type
soCandidate.tcpType = TcpType.SO;
// TCP ICE extension
IceExtension iceExtension = new IceExtension();
iceExtension.name = Encoding.UTF8.GetBytes("tcptype");
iceExtension.value = Encoding.UTF8.GetBytes("so");
soCandidate.extension_list.Add(iceExtension);
return soCandidate;
}
private static byte[] ComputeFoundation(IceCandidate candidate) // checked
{
/*
RFC 5245, ICE, Section 4.1.1.3
Finally, the agent assigns each candidate a foundation. The
foundation is an identifier, scoped within a session. Two candidates
MUST have the same foundation ID when all of the following are true:
o they are of the same type (host, relayed, server reflexive, or
peer reflexive).
o their bases have the same IP address (the ports can be different).
o for reflexive and relayed candidates, the STUN or TURN servers
used to obtain them have the same IP address.
o they were obtained using the same transport protocol (TCP, UDP,
etc.).
Similarly, two candidates MUST have different foundations if their
types are different, their bases have different IP addresses, the
STUN or TURN servers used to obtain them have different IP addresses,
or their transport protocols are different.
*/
// type and transport protocol are both included in cand_type enum
// and the candidates are always gathered from same servers (defined in config)
// so we can build a foundation string out of the cand_type and the IP Address of the base, if a base exists (no host candidate)
string candType = candidate.cand_type.ToString();
string baseIPAddress = "";
// if candidate has base (no host candidate)
if (candidate.rel_addr_port != null)
baseIPAddress = candidate.rel_addr_port.ipaddr.ToString();
string foundation = candType + baseIPAddress;
return Encoding.ASCII.GetBytes(foundation);
}
// HOST METHODS
private static IceCandidate GatherHostActiveCandidate(IPAddress localIPAddress)
{
IPEndPoint localEndpoint = new IPEndPoint(localIPAddress, 0);
//Socket activeConnectingSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
//// here is no bind, because active candidates don't have to be physically allocated here (allocation in connectivity checks)
//activeConnectingSocket.Bind(localEndpoint); // TEST
/* RFC 6544 (ICE TCP), Section 3:
In the case of active candidates, both IP
address and port are present, but the port is meaningless (it is
there only for making encoding of active candidates consistent with
the other candidate types and is ignored by the peer). As a
consequence, active candidates do not need to be physically allocated
at the time of address gathering. Rather, the physical allocations,
which occur as a consequence of a connection attempt, occur at the
time of the connectivity checks.
*/
// save data in candidate object
IpAddressPort activeIpAddressPort = new IpAddressPort(AddressType.IPv4_Address, localEndpoint.Address, (ushort)localEndpoint.Port);
IceCandidate activeCandidate = new IceCandidate(activeIpAddressPort, Overlay_Link.TLS_TCP_with_FH);
activeCandidate.cand_type = CandType.tcp_host;
//activeCandidate.activeConnectingSocket = activeConnectingSocket; // TEST: in PerformCheck
// TCP Type
activeCandidate.tcpType = TcpType.Active;
// TCP ICE extension
IceExtension iceExtension = new IceExtension();
iceExtension.name = Encoding.UTF8.GetBytes("tcptype");
iceExtension.value = Encoding.UTF8.GetBytes("active");
activeCandidate.extension_list.Add(iceExtension);
return activeCandidate;
}
private static IceCandidate GatherNAPassiveCandidate(IPAddress localIPAddress)
{
// local endpoint
IPEndPoint localEndpoint = new IPEndPoint(localIPAddress, 0);
// only one listening socket, because there is no need to use a STUN server. We get the IP and Port from the NAT using UPnP
Socket passiveListeningSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
passiveListeningSocket.Bind(localEndpoint);
// update localEndpoint with binded Port
localEndpoint = (IPEndPoint)passiveListeningSocket.LocalEndPoint;
// check if UPnP is available
UPnP upnp = new UPnP();
bool foundUPnPDevice = false;
try
{
foundUPnPDevice = upnp.Discover(localIPAddress);
}
catch (Exception e)
{
//Console.WriteLine(e.Message);
return null;
}
// IPEndPoint for public mapping
IPEndPoint publicMapping = null;
// found UPnP internet gateway device?
if (foundUPnPDevice)
{
// try to get public IP and to add a port mapping
try
{
string publicIP = upnp.GetExternalIP().ToString();
// we can use the local Port for the public NAT port mapping too
bool addedPortMapping = upnp.AddPortMapping((ushort)localEndpoint.Port, (ushort)localEndpoint.Port, ProtocolType.Tcp, "RELOAD ICE TCP Port mapping");
if (addedPortMapping && !string.IsNullOrEmpty(publicIP))
{
publicMapping = new IPEndPoint(IPAddress.Parse(publicIP), localEndpoint.Port);
}
else
return null;
}
catch (Exception e)
{
//Console.WriteLine(e.Message);
return null;
}
}
// no UPnP IGD found
else
return null;
// got public mapping?
if (publicMapping == null)
return null;
// save data in candidate object
IpAddressPort passiveIpAddressPort = new IpAddressPort(AddressType.IPv4_Address, publicMapping.Address, (ushort)publicMapping.Port);
IceCandidate passiveCandidate = new IceCandidate(passiveIpAddressPort, Overlay_Link.TLS_TCP_with_FH);
passiveCandidate.cand_type = CandType.tcp_nat;
passiveCandidate.rel_addr_port = new IpAddressPort(AddressType.IPv4_Address, localEndpoint.Address, (ushort)localEndpoint.Port);
passiveCandidate.passiveListeningSocket = passiveListeningSocket;
// TCP Type
passiveCandidate.tcpType = TcpType.Passive;
// TCP ICE extension
IceExtension iceExtension = new IceExtension();
iceExtension.name = Encoding.UTF8.GetBytes("tcptype");
iceExtension.value = Encoding.UTF8.GetBytes("passive");
passiveCandidate.extension_list.Add(iceExtension);
return passiveCandidate;
}
public bool Equals(IceCandidate cand)
{
// If parameter is null return false:
if ((object)cand == null)
{
return false;
}
// Return true if the fields match:
return (addr_port.port == cand.addr_port.port) &&
(priority == cand.priority) &&
(cand_type == cand.cand_type) &&
(tcpType == cand.tcpType);
}
public static void CloseAllCandidateSockets(IceCandidate candidate)
{
if (candidate.activeConnectingSocket != null)
candidate.activeConnectingSocket.Close();
if (candidate.passiveAcceptedSocket != null)
candidate.passiveAcceptedSocket.Close();
if (candidate.passiveListeningSocket != null)
candidate.passiveListeningSocket.Close();
if (candidate.passiveSTUNSocket != null)
candidate.passiveSTUNSocket.Close();
if (candidate.soAcceptedSocket != null)
candidate.soAcceptedSocket.Close();
if (candidate.soConnectingSocket != null)
candidate.soConnectingSocket.Close();
if (candidate.soListeningSocket != null)
candidate.soListeningSocket.Close();
if (candidate.soSTUN1Socket != null)
candidate.soSTUN1Socket.Close();
if (candidate.soSTUN2Socket != null)
candidate.soSTUN2Socket.Close();
}
//public static void PrintCandidate(IceCandidate iceCandidate)
//{
// Console.WriteLine("{0}:{1}", iceCandidate.addr_port.ipaddr.ToString(), iceCandidate.addr_port.port);
//}
public static void PrintCandidate(IceCandidate iceCandidate)
{
Console.WriteLine("{0}:{1} ({2})", iceCandidate.addr_port.ipaddr.ToString(), iceCandidate.addr_port.port, iceCandidate.tcpType.ToString());
if (iceCandidate.rel_addr_port != null)
{
Console.WriteLine("\tBase: " + iceCandidate.rel_addr_port.ipaddr.ToString() + ":" + iceCandidate.rel_addr_port.port);
}
}
public CandidatePair(IceCandidate localCandidate, IceCandidate remoteCandidate)
{
this.localCandidate = localCandidate;
this.remoteCandidate = remoteCandidate;
this.valid = false;
this.nominated = false;
this.state = CandidatePairState.Frozen;
this.pairPriority = 0;
/* RFC 5245, ICE, Section 5.7.4
Each candidate pair in the check list has a foundation and a state.
The foundation is the combination of the foundations of the local and
remote candidates in the pair.
*/
if (localCandidate.foundation != null && remoteCandidate.foundation != null)
{
this.pairFoundation = new byte[localCandidate.foundation.Length + remoteCandidate.foundation.Length];
// first copy local candidate foundation
Array.Copy(localCandidate.foundation, 0, this.pairFoundation, 0, localCandidate.foundation.Length);
// then copy remote candidate foundation
Array.Copy(remoteCandidate.foundation, 0, this.pairFoundation, localCandidate.foundation.Length, remoteCandidate.foundation.Length);
}
else
this.pairFoundation = null;
}
public static IceCandidate CreateBootstrapCandidate(IPAddress localIPAddress, int port)
{
// save data in candidate object
IpAddressPort bootstrapIpAddressPort = new IpAddressPort(AddressType.IPv4_Address, localIPAddress, (ushort)port);
IceCandidate bootstrapCandidate = new IceCandidate(bootstrapIpAddressPort, Overlay_Link.TLS_TCP_with_FH);
bootstrapCandidate.cand_type = CandType.tcp_bootstrap;
// TCP Type
bootstrapCandidate.tcpType = TcpType.Passive;
// TCP ICE extension
IceExtension iceExtension = new IceExtension();
iceExtension.name = Encoding.UTF8.GetBytes("tcptype");
iceExtension.value = Encoding.UTF8.GetBytes("passive");
bootstrapCandidate.extension_list.Add(iceExtension);
// set other preference and foundation
bootstrapCandidate.otherPreference = 8191;
bootstrapCandidate.foundation = ComputeFoundation(bootstrapCandidate);
return bootstrapCandidate;
}
public override RELOAD_MessageBody FromReader(ReloadMessage rm, BinaryReader reader, long reload_msg_size)
{
/* try to read the packet as a AppAttachReqAns packet */
try
{
byte length;
RELOAD_MsgCode = (RELOAD_MessageCode)(UInt16)IPAddress.NetworkToHostOrder(reader.ReadInt16());
UInt32 message_len = (UInt32)(IPAddress.HostToNetworkOrder((int)reader.ReadInt32()));
/* The username fragment (from ICE), we set it to zero length in NO-ICE */
length = reader.ReadByte();
if (length != 0)
ufrag = reader.ReadBytes(length);
reload_msg_size = reload_msg_size - (length + 1);
/* The The ICE password, we set it to zero length in NO-ICE */
length = reader.ReadByte();
if (length != 0)
password = reader.ReadBytes(length);
reload_msg_size = reload_msg_size - (length + 1);
/* An active/passive/actpass attribute from RFC 4145 [RFC4145]. */
length = reader.ReadByte();
if (length != 0)
role = reader.ReadBytes(length);
reload_msg_size = reload_msg_size - (length + 1);
while (reload_msg_size > 0)
{
AddressType type = (AddressType)reader.ReadByte();
IPAddress ip;
length = reader.ReadByte();
--reload_msg_size;
switch (type)
{
case AddressType.IPv4_Address:
if (length != 6)
return null;
ip = new IPAddress(reader.ReadBytes(4));
reload_msg_size = reload_msg_size - length;
break;
case AddressType.IPv6_Address:
if (length != 18)
return null;
ip = new IPAddress(reader.ReadBytes(16));
reload_msg_size = reload_msg_size - length;
break;
default:
throw new System.Exception(String.Format("Invalid address type {0} in AppAttachReqAns!", type));
}
UInt16 port = (ushort)IPAddress.NetworkToHostOrder(reader.ReadInt16());
Overlay_Link overlay_link = (Overlay_Link)reader.ReadByte();
IceCandidate candidate = new IceCandidate(new IpAddressPort(type, ip, port), overlay_link);
int fond_length = reader.ReadByte();
candidate.foundation = reader.ReadBytes(fond_length);
reload_msg_size = reload_msg_size - fond_length - 1;
candidate.priority = (UInt32)IPAddress.NetworkToHostOrder(reader.ReadInt32());
candidate.cand_type = (CandType)reader.ReadByte();
reload_msg_size = reload_msg_size - 8;
switch (candidate.cand_type)
{
case CandType.tcp_host:
/* do nothing */
break;
case CandType.tcp_prflx:
case CandType.tcp_relay:
case CandType.tcp_srflx:
type = (AddressType)reader.ReadByte();
byte rel_length = reader.ReadByte();
--reload_msg_size;
switch (type)
{
case AddressType.IPv4_Address:
if (rel_length != 6)
return null;
ip = new IPAddress(reader.ReadBytes(4));
reload_msg_size = reload_msg_size - length;
break;
case AddressType.IPv6_Address:
if (rel_length != 18)
return null;
ip = new IPAddress(reader.ReadBytes(16));
reload_msg_size = reload_msg_size - rel_length;
break;
default:
throw new System.Exception(String.Format("Invalid rel address type {0} in AppAttachReqAns!", type));
}
port = (ushort)IPAddress.NetworkToHostOrder(reader.ReadInt16());
candidate.rel_addr_port = new IpAddressPort(type, ip, port);
break;
}
ice_candidates.Add(candidate);
}
}
catch (Exception ex)
{
throw ex;
}
return this;
}
public List<IceCandidate> IPAddressToIceCandidate(IPAddress ip, int portNum)
{
List<IceCandidate> ice_candidates = new List<IceCandidate>();
if (ip == null)
return null;
/* exclude IPv6 addresses for now */
if (ip.AddressFamily == AddressFamily.InterNetworkV6)
return null;
/* Setup an TCP candidate first */
IceCandidate candidate = new IceCandidate(new IpAddressPort(ip.AddressFamily == AddressFamily.InterNetworkV6 ? AddressType.IPv6_Address : AddressType.IPv4_Address, ip, (UInt16)portNum), Overlay_Link.TLS_TCP_FH_NO_ICE);
/* when sending an AppAttachReqAns, form one candidate with a
priority value of (2^24)*(126)+(2^8)*(65535)+(2^0)*(256-1) that
specifies the UDP port being listened to and another one with the
TCP port. */
ice_candidates.Add(candidate);
/* same on UDP with same port number */
IceCandidate candidate2 = new IceCandidate(new IpAddressPort(ip.AddressFamily == AddressFamily.InterNetworkV6 ? AddressType.IPv6_Address : AddressType.IPv4_Address, ip, (UInt16)portNum), Overlay_Link.DLTS_UDP_SR_NO_ICE);
ice_candidates.Add(candidate2);
return ice_candidates;
}
public override RELOAD_MessageBody FromReader(ReloadMessage rm, BinaryReader reader, long reload_msg_size)
{
/* try to read the packet as a AttachReqAns packet */
try
{
byte length;
RELOAD_MsgCode = (RELOAD_MessageCode)(UInt16)IPAddress.NetworkToHostOrder(reader.ReadInt16());
UInt32 message_len = (UInt32)(IPAddress.HostToNetworkOrder((int)reader.ReadInt32()));
/* The username fragment (from ICE), we set it to zero length in NO-ICE */
length = reader.ReadByte();
if (length != 0)
ufrag = reader.ReadBytes(length);
reload_msg_size -= (length + 1);
/* The The ICE password, we set it to zero length in NO-ICE */
length = reader.ReadByte();
if (length != 0)
password = reader.ReadBytes(length);
reload_msg_size -= (length + 1);
/* An active/passive/actpass attribute from RFC 4145 [RFC4145]. */
length = reader.ReadByte();
if (length != 0)
role = reader.ReadBytes(length);
reload_msg_size -= (length + 1);
long ice_length = (UInt16)IPAddress.NetworkToHostOrder(reader.ReadInt16());
reload_msg_size -= (ice_length + 2);
while (ice_length > 1) //size of bool which follows
{
AddressType type = (AddressType)reader.ReadByte();
--ice_length;
IPAddress ip;
length = reader.ReadByte();
--ice_length;
switch (type)
{
case AddressType.IPv4_Address:
if (length != 6)
return null;
ip = new IPAddress(reader.ReadBytes(4));
ice_length -= length;
break;
case AddressType.IPv6_Address:
if (length != 18)
return null;
ip = new IPAddress(reader.ReadBytes(16));
ice_length -= length;
break;
default:
throw new System.Exception(String.Format("Invalid address type {0} in AttachReqAns!", type));
}
UInt16 port = (ushort)IPAddress.NetworkToHostOrder(reader.ReadInt16());
ice_length -= 2;
Overlay_Link overlay_link = (Overlay_Link)reader.ReadByte();
--ice_length;
IceCandidate candidate = new IceCandidate(new IpAddressPort(type, ip, port), overlay_link);
int fond_length = reader.ReadByte();
candidate.foundation = reader.ReadBytes(fond_length);
ice_length -= (fond_length - 1);
candidate.priority = (UInt32)IPAddress.NetworkToHostOrder(reader.ReadInt32());
ice_length -= 4;
candidate.cand_type = (CandType)reader.ReadByte();
--ice_length;
switch (candidate.cand_type)
{
case CandType.tcp_host:
/* do nothing */
break;
case CandType.tcp_prflx:
case CandType.tcp_nat: // new
case CandType.tcp_relay:
case CandType.tcp_srflx:
type = (AddressType)reader.ReadByte();
byte rel_length = reader.ReadByte();
//--ice_length;
ice_length -= 2; // markus
switch (type)
{
case AddressType.IPv4_Address:
if (rel_length != 6)
return null;
ip = new IPAddress(reader.ReadBytes(4));
ice_length -= rel_length;
break;
case AddressType.IPv6_Address:
if (rel_length != 18)
return null;
ip = new IPAddress(reader.ReadBytes(16));
ice_length -= rel_length;
break;
default:
throw new System.Exception(String.Format("Invalid rel address type {0} in AttachReqAns!", type));
}
port = (ushort)IPAddress.NetworkToHostOrder(reader.ReadInt16());
ice_length -= 2;
candidate.rel_addr_port = new IpAddressPort(type, ip, port);
break;
}
/*
// now read ice extension length
long ice_extension_size = (UInt16)IPAddress.NetworkToHostOrder(reader.ReadInt16());
if (ice_extension_size != 0)
{
//skip ice extension length
reader.ReadBytes((int)ice_extension_size);
}
ice_length -= (ice_extension_size + 2);
*/
#region markus
// all new attributes for TCP ICE
// type preference
candidate.typePreference = (UInt32)IPAddress.NetworkToHostOrder(reader.ReadInt32());
ice_length -= 4;
// local preference
candidate.localPreference = (UInt32)IPAddress.NetworkToHostOrder(reader.ReadInt32());
ice_length -= 4;
// direction preference
candidate.directionPreference = (UInt32)IPAddress.NetworkToHostOrder(reader.ReadInt32());
ice_length -= 4;
// other preference
candidate.otherPreference = (UInt32)IPAddress.NetworkToHostOrder(reader.ReadInt32());
ice_length -= 4;
// tcp type
candidate.tcpType = (TcpType)reader.ReadByte();
--ice_length;
// ice extension
IceExtension iceExtension = new IceExtension();
iceExtension.name = Encoding.UTF8.GetBytes("tcptype");
iceExtension.value = Encoding.UTF8.GetBytes(candidate.tcpType.ToString());
candidate.extension_list.Add(iceExtension);
#endregion
ice_candidates.Add(candidate);
}
fSendUpdate = (bool)(reader.ReadByte() == 0 ? false : true);
--reload_msg_size;
}
catch (Exception ex)
{
throw ex;
}
return this;
}
private static IceCandidate GatherSRSOCandidate(IPAddress localIPAddress)
{
// local endpoint
IPEndPoint localEndpoint = new IPEndPoint(localIPAddress, 0);
// listening socket
Socket soListeningSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
soListeningSocket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true);
soListeningSocket.Bind(localEndpoint);
// update localEndpoint with binded Port
localEndpoint = (IPEndPoint)soListeningSocket.LocalEndPoint;
// connecting socket
Socket soConnectingSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
soConnectingSocket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true);
soConnectingSocket.Bind(localEndpoint);
// STUN1 socket
Socket soSTUN1Socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
soSTUN1Socket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true);
soSTUN1Socket.Bind(localEndpoint);
// STUN2 socket
Socket soSTUN2Socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
soSTUN2Socket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true);
soSTUN2Socket.Bind(localEndpoint);
// public mapping
IPEndPoint publicMapping = null;
// get defined STUN servers
List<IPEndPoint> definedSTUNServers = GetDefinedSTUNServers();
// no defined STUN servers
if (definedSTUNServers.Count == 0)
return null;
// only one STUN Server defined
// so we can't predict the port mapping for two successive outgoing connections
// what we can do here is to assume that the outgoing connections get the same port mapping
else if (definedSTUNServers.Count == 1)
{
// try to connect
try
{
soSTUN1Socket.Connect(definedSTUNServers[0]);
}
catch (Exception e)
{
//Console.WriteLine(e.Message);
// could not connect to STUN server
return null;
}
publicMapping = GetPublicMapping(soSTUN1Socket);
}
// two STUN servers defined
// here we can predict the port mapping for two successive outgoing connections
else if (definedSTUNServers.Count == 2)
{
// try to connect to first STUN server
try
{
// get first public mapping
soSTUN1Socket.Connect(definedSTUNServers[0]);
IPEndPoint mapping1 = GetPublicMapping(soSTUN1Socket);
// now try to connect to second STUN Server
try
{
soSTUN2Socket.Connect(definedSTUNServers[1]);
IPEndPoint mapping2 = GetPublicMapping(soSTUN2Socket);
// calculate difference between port mappings
int portDifference = mapping2.Port - mapping1.Port;
// IP will be the same, port will be adapted
publicMapping = new IPEndPoint(mapping2.Address, mapping2.Port + portDifference);
}
catch (Exception e)
{
//Console.WriteLine(e.Message);
// use first mapping and assume port mapping will be equal
publicMapping = mapping1;
}
}
catch (Exception e1)
{
//Console.WriteLine(e1.Message);
// could not connect to first STUN server
// try second, but then we can't predict port mapping, only assume the port mapping will be equal for next outgoing connection
try
{
soSTUN2Socket.Connect(definedSTUNServers[1]);
publicMapping = GetPublicMapping(soSTUN2Socket);
}
catch (Exception e2)
{
//Console.WriteLine(e2.Message);
// could not connect to first and second STUN Server
return null;
}
}
}
// got no public mapping
if (publicMapping == null)
return null;
// save data in candidate object
IpAddressPort soIpAddressPort = new IpAddressPort(AddressType.IPv4_Address, publicMapping.Address, (ushort)publicMapping.Port);
IceCandidate soCandidate = new IceCandidate(soIpAddressPort, Overlay_Link.TLS_TCP_with_FH);
soCandidate.cand_type = CandType.tcp_srflx;
soCandidate.rel_addr_port = new IpAddressPort(AddressType.IPv4_Address, localEndpoint.Address, (ushort)localEndpoint.Port);
soCandidate.soListeningSocket = soListeningSocket;
soCandidate.soConnectingSocket = soConnectingSocket;
soCandidate.soSTUN1Socket = soSTUN1Socket;
soCandidate.soSTUN2Socket = soSTUN2Socket;
// TCP Type
soCandidate.tcpType = TcpType.SO;
// TCP ICE extension
IceExtension iceExtension = new IceExtension();
iceExtension.name = Encoding.UTF8.GetBytes("tcptype");
iceExtension.value = Encoding.UTF8.GetBytes("so");
soCandidate.extension_list.Add(iceExtension);
return soCandidate;
}
private static uint DetermineDirectionPreference(IceCandidate iceCandidate)
{
// RFC 6544, Section 4.2:
/*
The direction-pref MUST be between 0 and 7 (both inclusive), with 7
being the most preferred. It is RECOMMENDED that the host, UDP-tunneled,
and relayed TCP candidates have the direction-pref assigned as follows:
6 for active, 4 for passive, and 2 for S-O. For the NAT-assisted and
server reflexive candidates, the RECOMMENDED values are: 6 for S-O,
4 for active, and 2 for passive.
*/
// check for TCP extension
if (iceCandidate.extension_list != null && iceCandidate.extension_list.Count == 1)
{
// Host, UDP-tunneled oder Relayed candidate
if (iceCandidate.cand_type == CandType.tcp_host || iceCandidate.cand_type == CandType.tcp_udptunneled || iceCandidate.cand_type == CandType.tcp_relay)
{
switch (Encoding.UTF8.GetString(iceCandidate.extension_list[0].value))
{
case "active":
return 6;
case "passive":
return 4;
case "so":
return 2;
}
}
// NAT-assisted oder Server Reflexive candidate
else if (iceCandidate.cand_type == CandType.tcp_nat || iceCandidate.cand_type == CandType.tcp_srflx)
{
switch (Encoding.UTF8.GetString(iceCandidate.extension_list[0].value))
{
case "active":
return 4;
case "passive":
return 2;
case "so":
return 6;
}
}
// no supported candidate
else
return 0;
}
// no TCP extension specified
return 0;
}
// NAT METHODS
private static IceCandidate GatherNAActiveCandidate(IPAddress localIPAddress, IceCandidate baseCandidate)
{
// exactly the same procedure like GatherSRActiveCandidate()
// derived from passive NAT assisted candidate
IPEndPoint localEndpoint = new IPEndPoint(localIPAddress, 0);
Socket activeConnectingSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
// here is no bind, because active candidates don't have to be physically allocated here (allocation in connectivity checks)
/* RFC 6544 (ICE TCP), Section 3:
In the case of active candidates, both IP
address and port are present, but the port is meaningless (it is
there only for making encoding of active candidates consistent with
the other candidate types and is ignored by the peer). As a
consequence, active candidates do not need to be physically allocated
at the time of address gathering. Rather, the physical allocations,
which occur as a consequence of a connection attempt, occur at the
time of the connectivity checks.
*/
// create candidate object
IpAddressPort activeIpAddressPort = new IpAddressPort(AddressType.IPv4_Address, baseCandidate.addr_port.ipaddr, 0); // port is meaningless
IceCandidate activeCandidate = new IceCandidate(activeIpAddressPort, Overlay_Link.TLS_TCP_with_FH);
activeCandidate.cand_type = CandType.tcp_nat;
activeCandidate.rel_addr_port = new IpAddressPort(AddressType.IPv4_Address, localEndpoint.Address, 0); // port is meaningless
activeCandidate.activeConnectingSocket = activeConnectingSocket;
// TCP Type
activeCandidate.tcpType = TcpType.Active;
// TCP ICE extension
IceExtension iceExtension = new IceExtension();
iceExtension.name = Encoding.UTF8.GetBytes("tcptype");
iceExtension.value = Encoding.UTF8.GetBytes("active");
activeCandidate.extension_list.Add(iceExtension);
return activeCandidate;
}
private static IceCandidate CalculatePriority(IceCandidate iceCandidate)
{
// set type preference
switch (iceCandidate.cand_type)
{
case CandType.tcp_host:
iceCandidate.typePreference = (uint)TypePreference.Host;
break;
case CandType.tcp_nat:
iceCandidate.typePreference = (uint)TypePreference.NATAssisted;
break;
case CandType.tcp_prflx:
iceCandidate.typePreference = (uint)TypePreference.PeerReflexive;
break;
case CandType.tcp_relay:
iceCandidate.typePreference = (uint)TypePreference.Relay;
break;
case CandType.tcp_srflx:
iceCandidate.typePreference = (uint)TypePreference.ServerReflexive;
break;
case CandType.tcp_udptunneled:
iceCandidate.typePreference = (uint)TypePreference.UDPTunneled;
break;
// no supported candidate type
default:
return null;
}
// RFC 6940 (RELOAD), Section 6.5.1.1:
// Each ICE candidate is represented as an IceCandidate structure, which is a direct translation of the information from the ICE string
// structures, with the exception of the component ID. Since there is only one component, it is always 1, and thus left out of the structure.
// component ID : RELOAD specific => always 1
// RFC 6544, Section 4.2:
// local preference = (2^13) * direction-pref + other-pref
iceCandidate.directionPreference = DetermineDirectionPreference(iceCandidate);
// other-pref is set in GatherCandidates()
// decremented for each IP Address (or device)
// see RFC 6544, Section 4.2:
/*
If any two candidates have the same type-preference and direction-
pref, they MUST have a unique other-pref. With this specification,
this usually only happens with multi-homed hosts, in which case
other-pref is the preference for the particular IP address from which
the candidate was obtained. When there is only a single IP address,
this value SHOULD be set to the maximum allowed value (8191).
*/
// calculate localPreference
iceCandidate.localPreference = ((uint)PowerOf2(13)) * iceCandidate.directionPreference + iceCandidate.otherPreference;
// calculate priority
// RFC 5245, Section 4.1.2.1, formula:
// priority = (2^24)*(type preference) + (2^8)*(local preference) + (2^0)*(256 - component ID)
iceCandidate.priority = ((uint)PowerOf2(24)) * (iceCandidate.typePreference) + ((uint)PowerOf2(8)) * (iceCandidate.localPreference) + 255;
return iceCandidate;
}
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
public bool EqualsInAddressPort(IceCandidate iceCandidate)
{
// check if IP Address and Port are equal
if (this.addr_port.ipaddr.Equals(iceCandidate.addr_port.ipaddr) &&
this.addr_port.port == iceCandidate.addr_port.port &&
this.addr_port.type == iceCandidate.addr_port.type)
{
return true;
}
else
return false;
}
