/// <summary>
/// Dns relay session constructor.
/// </summary>
/// <param name="server">Owner relay server.</param>
/// <param name="localBindInfo">Local bind info.</param>
/// <param name="realyItem">Relay item.</param>
/// <exception cref="ArgumentNullException">Is raised when <b>server</b>,<b>localBindInfo</b> or <b>realyItem</b> is null.</exception>
/// <exception cref="ArgumentException">Is raised when any of the arguments has invalid value.</exception>
internal Relay_Session(Relay_Server server, IPBindInfo localBindInfo, Relay_QueueItem realyItem)
{
if (server == null)
{
throw new ArgumentNullException("server");
}
if (localBindInfo == null)
{
throw new ArgumentNullException("localBindInfo");
}
if (realyItem == null)
{
throw new ArgumentNullException("realyItem");
}
m_pServer = server;
m_pLocalBindInfo = localBindInfo;
m_pRelayItem = realyItem;
m_SessionID = Guid.NewGuid().ToString();
m_SessionCreateTime = DateTime.Now;
m_pTargets = new List <Relay_Target>();
m_pSmtpClient = new SMTP_Client();
m_pSmtpClient.BdatEnabled = false;
}
/// <summary>
/// Smart host relay session constructor.
/// </summary>
/// <param name="server">Owner relay server.</param>
/// <param name="localBindInfo">Local bind info.</param>
/// <param name="realyItem">Relay item.</param>
/// <param name="smartHosts">Smart hosts.</param>
/// <exception cref="ArgumentNullException">Is raised when <b>server</b>,<b>localBindInfo</b>,<b>realyItem</b> or <b>smartHosts</b>is null.</exception>
/// <exception cref="ArgumentException">Is raised when any of the arguments has invalid value.</exception>
internal Relay_Session(Relay_Server server,
IPBindInfo localBindInfo,
Relay_QueueItem realyItem,
Relay_SmartHost[] smartHosts)
{
if (server == null)
{
throw new ArgumentNullException("server");
}
if (localBindInfo == null)
{
throw new ArgumentNullException("localBindInfo");
}
if (realyItem == null)
{
throw new ArgumentNullException("realyItem");
}
if (smartHosts == null)
{
throw new ArgumentNullException("smartHosts");
}
m_pServer = server;
m_pLocalBindInfo = localBindInfo;
m_pRelayItem = realyItem;
m_pSmartHosts = smartHosts;
m_RelayMode = Relay_Mode.SmartHost;
m_SessionID = Guid.NewGuid().ToString();
m_SessionCreateTime = DateTime.Now;
m_pTargets = new List <Relay_Target>();
}
/// <summary>
/// Default constructor.
/// </summary>
/// <param name="sessionID">Session ID.</param>
/// <param name="socket">Server connected socket.</param>
/// <param name="bindInfo">BindInfo what accepted socket.</param>
/// <param name="server">Reference to server.</param>
internal FTP_Session(string sessionID, SocketEx socket, IPBindInfo bindInfo, FTP_Server server) : base(sessionID, socket, bindInfo, server)
{
m_pServer = server;
// Start session proccessing
StartSession();
}
public void Start()
{
if (!_started)
{
_localIP = IPAddressHelper.GetLocalIp();
Gateway gw = InfoService.Instance.CurrentGateway; //当前网关配置。
_localAOR = $"{gw.SipNumber}@{_localIP}";
//m_stack = new SIP_Stack();
//m_stack.Realm = "seecool"; //本地域，当需要验证远程注册用户的时候，发送此域。
//m_stack.UserAgent = "NetGateway www.seecool.cc";//必须设置。
//m_stack.Error += M_stack_Error;
//m_stack.RequestReceived += M_stack_RequestReceived;
//m_stack.ResponseReceived += M_stack_ResponseReceived;
//m_stack.Logger.WriteLog += Logger_WriteLog;
//用户注册授权凭证，向远程服务器注册本机时需要。
//m_stack.Credentials.Add(new NetworkCredential("admin", "admin", "seecool"));
//添加本地端口绑定
IPBindInfo[] bindInfo = new IPBindInfo[] {
new IPBindInfo(_localIP, BindInfoProtocol.UDP, IPAddress.Parse(_localIP), gw.Port),
new IPBindInfo(_localIP, BindInfoProtocol.TCP, IPAddress.Parse(_localIP), gw.Port)
};
Stack.BindInfo = bindInfo;
Stack.Start();
addVirtualServer();
_deviceMgr.Start();
_started = true;
}
}
/// <summary>
/// Default constructor.
/// </summary>
/// <param name="socket">Listening socket.</param>
/// <param name="bindInfo">Bind info what acceped socket.</param>
/// <exception cref="ArgumentNullException">Is raised when <b>socket</b> or <b>bind</b> is null.</exception>
public ListeningPoint(Socket socket, IPBindInfo bindInfo)
{
AssertUtil.ArgumentNotNull(socket, nameof(socket));
AssertUtil.ArgumentNotNull(bindInfo, nameof(bindInfo));
this.Socket = socket;
this.BindInfo = bindInfo;
}
public void LoadTcpSettings(QueueHost host)
{
IPBindInfo bindinfo = new IPBindInfo(host.HostAddress, NetworkProtocol.Tcp, IPAddress.Any, host.Port);
MaxConnections = 0;
MaxConnectionsPerIP = 0;
TaskIdleTimeout = 0;
}
/// <summary>
/// Default constructor.
/// </summary>
/// <param name="sessionID">Session ID.</param>
/// <param name="socket">Server connected socket.</param>
/// <param name="bindInfo">BindInfo what accepted socket.</param>
/// <param name="server">Reference to server.</param>
internal FTP_Session(string sessionID, SocketEx socket, IPBindInfo bindInfo, FTP_Server server)
: base(sessionID, socket, bindInfo, server)
{
m_pServer = server;
// Start session proccessing
StartSession();
}
private void LoadData()
{
try
{
SipSettings sIP = this.m_pVirtualServer.SystemSettings.SIP;
this.m_pTabGeneral_Enabled.Checked = sIP.Enabled;
if ((sIP.ProxyMode & SIP_ProxyMode.B2BUA) != (SIP_ProxyMode)0)
{
this.m_pTabGeneral_ProxyType.SelectedIndex = 0;
}
else
{
this.m_pTabGeneral_ProxyType.SelectedIndex = 1;
}
this.m_pTabGeneral_MinExpires.Value = Convert.ToDecimal(sIP.MinimumExpires);
IPBindInfo[] binds = sIP.Binds;
for (int i = 0; i < binds.Length; i++)
{
IPBindInfo iPBindInfo = binds[i];
ListViewItem listViewItem = new ListViewItem();
listViewItem.Text = iPBindInfo.HostName;
if (iPBindInfo.IP.ToString() == "0.0.0.0")
{
listViewItem.SubItems.Add("Any IPv4");
}
else if (iPBindInfo.IP.ToString() == "0:0:0:0:0:0:0:0")
{
listViewItem.SubItems.Add("Any IPv6");
}
else
{
listViewItem.SubItems.Add(iPBindInfo.IP.ToString());
}
listViewItem.SubItems.Add(iPBindInfo.Protocol.ToString());
listViewItem.SubItems.Add(iPBindInfo.Port.ToString());
listViewItem.SubItems.Add(iPBindInfo.SslMode.ToString());
listViewItem.SubItems.Add(Convert.ToString(iPBindInfo.Certificate != null));
listViewItem.Tag = iPBindInfo;
this.m_pTabGeneral_Bindings.Items.Add(listViewItem);
}
foreach (SipGateway sipGateway in this.m_pVirtualServer.SystemSettings.SIP.Gateways)
{
ListViewItem listViewItem2 = new ListViewItem(sipGateway.UriScheme);
listViewItem2.SubItems.Add(sipGateway.Transport);
listViewItem2.SubItems.Add(sipGateway.Host);
listViewItem2.SubItems.Add(sipGateway.Port.ToString());
listViewItem2.Tag = sipGateway;
this.m_pTabGateways_Gateways.Items.Add(listViewItem2);
}
this.m_pTabGateways_Gateways_SelectedIndexChanged(null, null);
}
catch (Exception x)
{
ErrorForm errorForm = new ErrorForm(x, new StackTrace());
errorForm.ShowDialog(this);
}
}
/// <summary>
/// Default constructor.
/// </summary>
/// <param name="socket">Socket.</param>
/// <exception cref="ArgumentNullException">Is raised when <b>socket</b> is null reference.</exception>
public TCP_Acceptor(Socket socket, IPBindInfo bindInfo)
{
if (socket == null)
{
throw new ArgumentNullException("socket");
}
m_pSocket = socket;
m_pBindInfo = bindInfo;
}
/// <summary>
/// Initialize and start new session here. Session isn't added to session list automatically,
/// session must add itself to server session list by calling AddSession().
/// </summary>
/// <param name="socket">Connected client socket.</param>
/// <param name="bindInfo">BindInfo what accepted socket.</param>
protected override void InitNewSession(Socket socket, IPBindInfo bindInfo)
{
string sessionID = Guid.NewGuid().ToString();
SocketEx socketEx = new SocketEx(socket);
if (LogCommands)
{
socketEx.Logger = new SocketLogger(socket, SessionLog);
socketEx.Logger.SessionID = sessionID;
}
FTP_Session session = new FTP_Session(sessionID, socketEx, bindInfo, this);
}
/// <summary>
/// Processes specified connection.
/// </summary>
/// <param name="socket">Accpeted socket.</param>
/// <param name="bindInfo">Local bind info what accpeted connection.</param>
/// <exception cref="ArgumentNullException">Is raised when <b>socket</b> or <b>bindInfo</b> is null reference.</exception>
private void ProcessConnection(Socket socket, IPBindInfo bindInfo)
{
if (socket == null)
{
throw new ArgumentNullException("socket");
}
if (bindInfo == null)
{
throw new ArgumentNullException("bindInfo");
}
m_ConnectionsProcessed++;
try
{
T session = new T();
session.Init(this,
socket,
bindInfo.HostName,
bindInfo.SslMode == SslMode.SSL,
bindInfo.Certificate);
// Maximum allowed connections exceeded, reject connection.
if (m_MaxConnections != 0 && m_pSessions.Count > m_MaxConnections)
{
OnMaxConnectionsExceeded(session);
session.Dispose();
}
// Maximum allowed connections per IP exceeded, reject connection.
else if (m_MaxConnectionsPerIP != 0)
{
OnMaxConnectionsPerIPExceeded(session);
session.Dispose();
}
// Start processing new session.
else
{
session.Disonnected +=
delegate(object sender, EventArgs e) { m_pSessions.Remove((T)sender); };
m_pSessions.Add(session);
OnSessionCreated(session);
session.Start();
}
}
catch (Exception x)
{
OnError(x);
}
}
/// <summary>
/// Default constructor.
/// </summary>
/// <param name="socket">Listening socket.</param>
/// <param name="bind">Bind info what acceped socket.</param>
/// <exception cref="ArgumentNullException">Is raised when <b>socket</b> or <b>bind</b> is null reference.</exception>
public ListeningPoint(Socket socket, IPBindInfo bind)
{
if (socket == null)
{
throw new ArgumentNullException("socket");
}
if (bind == null)
{
throw new ArgumentNullException("socket");
}
m_pSocket = socket;
m_pBindInfo = bind;
}
/// <summary>
/// Cleans up any resources being used.
/// </summary>
public void Dispose()
{
if (m_IsDisposed)
{
return;
}
m_IsDisposed = true;
m_pSocket = null;
m_pSocketArgs = null;
m_pBindInfo = null;
this.ConnectionAccepted = null;
this.Error = null;
}
private void LoadData()
{
try
{
SmtpSettings sMTP = this.m_pVirtualServer.SystemSettings.SMTP;
this.m_pEnabled.Checked = sMTP.Enabled;
this.m_pGreetingText.Text = sMTP.GreetingText;
this.m_pDefaultDomain.Text = sMTP.DefaultDomain;
this.m_pSessionTimeout.Value = sMTP.SessionIdleTimeOut;
this.m_pMaxConnections.Value = sMTP.MaximumConnections;
this.m_pMaxConnsPerIP.Value = sMTP.MaximumConnectionsPerIP;
this.m_pMaxBadCommands.Value = sMTP.MaximumBadCommands;
this.m_pMaxMessageSize.Value = sMTP.MaximumMessageSize;
this.m_pMaxRecipients.Value = sMTP.MaximumRecipientsPerMessage;
this.m_pMaxTransactions.Value = sMTP.MaximumTransactions;
this.m_pRequireAuth.Checked = sMTP.RequireAuthentication;
IPBindInfo[] binds = sMTP.Binds;
for (int i = 0; i < binds.Length; i++)
{
IPBindInfo iPBindInfo = binds[i];
ListViewItem listViewItem = new ListViewItem();
listViewItem.Text = iPBindInfo.HostName;
if (iPBindInfo.IP.ToString() == "0.0.0.0")
{
listViewItem.SubItems.Add("Any IPv4");
}
else if (iPBindInfo.IP.ToString() == "0:0:0:0:0:0:0:0")
{
listViewItem.SubItems.Add("Any IPv6");
}
else
{
listViewItem.SubItems.Add(iPBindInfo.IP.ToString());
}
listViewItem.SubItems.Add(iPBindInfo.Port.ToString());
listViewItem.SubItems.Add(iPBindInfo.SslMode.ToString());
listViewItem.SubItems.Add(Convert.ToString(iPBindInfo.Certificate != null));
listViewItem.Tag = iPBindInfo;
this.m_pTabGeneral_Bindings.Items.Add(listViewItem);
}
this.m_pTabGeneral_Bindings_SelectedIndexChanged(this, new EventArgs());
}
catch (Exception x)
{
ErrorForm errorForm = new ErrorForm(x, new StackTrace());
errorForm.ShowDialog(this);
}
}
/// <summary>
/// Completes relay session and does clean up. This method is thread-safe.
/// </summary>
/// <param name="exception">Exception happened or null if relay completed successfully.</param>
public void Dispose(Exception exception)
{
try
{
lock (this)
{
if (m_IsDisposed)
{
return;
}
try
{
m_pServer.OnSessionCompleted(this, exception);
}
catch
{
}
m_pServer.Sessions.Remove(this);
m_IsDisposed = true;
m_pLocalBindInfo = null;
m_pRelayItem = null;
m_pSmartHosts = null;
if (m_pSmtpClient != null)
{
m_pSmtpClient.Dispose();
m_pSmtpClient = null;
}
m_pTargets = null;
if (m_pActiveTarget != null)
{
m_pServer.RemoveIpUsage(m_pActiveTarget.Target.Address);
m_pActiveTarget = null;
}
m_pServer = null;
}
}
catch (Exception x)
{
if (m_pServer != null)
{
m_pServer.OnError(x);
}
}
}
//void Load()
//{
// this.LoadSettings(HostAddressTypes.tcp);
// if (Adapters.Count > 0)
// {
// List<IPBindInfo> binds = new List<IPBindInfo>();
// foreach (var adapter in Adapters)
// {
// IPBindInfo bindinfo = new IPBindInfo(adapter.Source.OriginalHostAddress, NetworkProtocol.Tcp, IPAddress.Any, adapter.Source.Port);
// binds.Add(bindinfo);
// }
// var first = Adapters[0];
// Bindings = binds.ToArray();
// MaxConnections = first.WorkerCount;
// MaxConnectionsPerIP = first.MaxItemsPerSession;
// TaskIdleTimeout = first.ConnectTimeout;
// }
//}
internal void Load(AdapterProperties[] adapters)
{
if (adapters != null && adapters.Length > 0)
{
List <IPBindInfo> binds = new List <IPBindInfo>();
foreach (var adapter in Adapters)
{
IPBindInfo bindinfo = new IPBindInfo(adapter.Source.HostAddress, NetworkProtocol.Tcp, IPAddress.Any, adapter.Source.Port);
binds.Add(bindinfo);
}
var first = Adapters[0];
Bindings = binds.ToArray();
MaxConnections = first.WorkerCount;
MaxConnectionsPerIP = first.MaxItemsPerSession;
TaskIdleTimeout = first.ConnectTimeout;
}
}
/// <summary>
/// Starts accepting connection(s).
/// </summary>
/// <param name="socketArgs">AcceptAsync method data.</param>
/// <param name="listeningSocket">Local listening socket.</param>
/// <param name="bindInfo">Local listening socket bind info.</param>
/// <exception cref="ArgumentNullException">Is raised when <b>socketArgs</b>,<b>listeningSocket</b> or <b>bindInfo</b> is null reference.</exception>
private void IOCompletionBeginAccept(SocketAsyncEventArgs socketArgs,
Socket listeningSocket,
IPBindInfo bindInfo)
{
if (socketArgs == null)
{
throw new ArgumentNullException("socketArgs");
}
if (listeningSocket == null)
{
throw new ArgumentNullException("listeningSocket");
}
if (bindInfo == null)
{
throw new ArgumentNullException("bindInfo");
}
try
{
// We need to clear it, before reuse.
socketArgs.AcceptSocket = null;
// Use active worker thread as long as AcceptAsync completes synchronously.
// (With this approeach we don't have thread context switches while AcceptAsync completes synchronously)
while (m_IsRunning && !listeningSocket.AcceptAsync(socketArgs))
{
// Operation completed synchronously.
if (socketArgs.SocketError == SocketError.Success)
{
ProcessConnection(socketArgs.AcceptSocket, bindInfo);
}
// We need to clear it, before reuse.
socketArgs.AcceptSocket = null;
}
}
catch (ObjectDisposedException x)
{
string dummy = x.Message;
// Listening socket closed, so skip that error.
}
}
/// <summary>
/// Processes specified connection.
/// </summary>
/// <param name="socket">Accpeted socket.</param>
/// <param name="bindInfo">Local bind info what accpeted connection.</param>
/// <exception cref="ArgumentNullException">Is raised when <b>socket</b> or <b>bindInfo</b> is null reference.</exception>
private void ProcessConnection(Socket socket, IPBindInfo bindInfo)
{
AssertUtil.ArgumentNotNull(socket, nameof(socket));
AssertUtil.ArgumentNotNull(bindInfo, nameof(bindInfo));
m_ConnectionsProcessed++;
try
{
T session = new T();
session.Init(this, socket, bindInfo.HostName, bindInfo.SslMode == SslMode.SSL, bindInfo.Certificate);
// Maximum allowed connections exceeded, reject connection.
if (m_MaxConnections > 0 && m_pSessions.Count > m_MaxConnections)
{
OnMaxConnectionsExceeded(session);
session.Dispose();
}
// Maximum allowed connections per IP exceeded, reject connection.
else if (m_MaxConnectionsPerIP > 0 &&
m_pSessions.GetConnectionsPerIP(session.RemoteEndPoint.Address) > m_MaxConnectionsPerIP)
{
OnMaxConnectionsPerIPExceeded(session);
session.Dispose();
}
// Start processing new session.
else
{
session.Disonnected += (sender, e) =>
{
m_pSessions.Remove((TCP_ServerSession)sender);
};
m_pSessions.Add(session);
OnSessionCreated(session);
session.Start();
}
}
catch (Exception ex)
{ OnError(ex); }
}
/// <summary>
/// Initialize and start new session here. Session isn't added to session list automatically,
/// session must add itself to server session list by calling AddSession().
/// </summary>
/// <param name="socket">Connected client socket.</param>
/// <param name="bindInfo">BindInfo what accepted socket.</param>
protected override void InitNewSession(Socket socket, IPBindInfo bindInfo)
{
// Check maximum conncurent connections from 1 IP.
if (m_MaxConnectionsPerIP > 0)
{
lock (this.Sessions){
int nSessions = 0;
foreach (SocketServerSession s in this.Sessions)
{
IPEndPoint ipEndpoint = s.RemoteEndPoint;
if (ipEndpoint != null)
{
if (ipEndpoint.Address.Equals(((IPEndPoint)socket.RemoteEndPoint).Address))
{
nSessions++;
}
}
// Maimum allowed exceeded
if (nSessions >= m_MaxConnectionsPerIP)
{
socket.Send(System.Text.Encoding.ASCII.GetBytes("421 Maximum connections from your IP address is exceeded, try again later !\r\n"));
socket.Shutdown(SocketShutdown.Both);
socket.Close();
return;
}
}
}
}
string sessionID = Guid.NewGuid().ToString();
SocketEx socketEx = new SocketEx(socket);
if (LogCommands)
{
socketEx.Logger = new SocketLogger(socket, this.SessionLog);
socketEx.Logger.SessionID = sessionID;
}
SMTP_Session session = new SMTP_Session(sessionID, socketEx, bindInfo, this);
}
/// <summary>
/// Dns relay session constructor.
/// </summary>
/// <param name="server">Owner relay server.</param>
/// <param name="localBindInfo">Local bind info.</param>
/// <param name="realyItem">Relay item.</param>
/// <exception cref="ArgumentNullException">Is raised when <b>server</b>,<b>localBindInfo</b> or <b>realyItem</b> is null.</exception>
/// <exception cref="ArgumentException">Is raised when any of the arguments has invalid value.</exception>
internal Relay_Session(Relay_Server server, IPBindInfo localBindInfo, Relay_QueueItem realyItem)
{
if (server == null)
{
throw new ArgumentNullException("server");
}
if (localBindInfo == null)
{
throw new ArgumentNullException("localBindInfo");
}
if (realyItem == null)
{
throw new ArgumentNullException("realyItem");
}
m_pServer = server;
m_pLocalBindInfo = localBindInfo;
m_pRelayItem = realyItem;
m_SessionID = Guid.NewGuid().ToString();
m_SessionCreateTime = DateTime.Now;
m_pTargets = new List<Relay_Target>();
}
/// <summary>
/// Processes relay queue.
/// </summary>
private void Run()
{
while (m_IsRunning)
{
try
{
// Bind info has changed, create new local end points.
if (m_HasBindingsChanged)
{
m_pLocalEndPoints.Clear();
foreach (IPBindInfo binding in m_pBindings)
{
if (binding.IP == IPAddress.Any)
{
foreach (IPAddress ip in Dns.GetHostAddresses(""))
{
if (ip.AddressFamily == AddressFamily.InterNetwork)
{
IPBindInfo b = new IPBindInfo(binding.HostName,
binding.Protocol,
ip,
25);
if (!m_pLocalEndPoints.Contains(b))
{
m_pLocalEndPoints.Add(b);
}
}
}
}
else if (binding.IP == IPAddress.IPv6Any)
{
foreach (IPAddress ip in Dns.GetHostAddresses(""))
{
if (ip.AddressFamily == AddressFamily.InterNetworkV6)
{
IPBindInfo b = new IPBindInfo(binding.HostName,
binding.Protocol,
ip,
25);
if (!m_pLocalEndPoints.Contains(b))
{
m_pLocalEndPoints.Add(b);
}
}
}
}
else
{
IPBindInfo b = new IPBindInfo(binding.HostName,
binding.Protocol,
binding.IP,
25);
if (!m_pLocalEndPoints.Contains(b))
{
m_pLocalEndPoints.Add(b);
}
}
}
m_HasBindingsChanged = false;
}
// There are no local end points specified.
if (m_pLocalEndPoints.Count == 0)
{
Thread.Sleep(10);
}
// Maximum allowed relay sessions exceeded, skip adding new ones.
else if (m_MaxConnections != 0 && m_pSessions.Count >= m_MaxConnections)
{
Thread.Sleep(10);
}
else
{
Relay_QueueItem item = null;
// Get next queued message from highest possible priority queue.
foreach (Relay_Queue queue in m_pQueues)
{
item = queue.DequeueMessage();
// There is queued message.
if (item != null)
{
break;
}
// No messages in this queue, see next lower priority queue.
}
// There are no messages in any queue.
if (item == null)
{
Thread.Sleep(10);
}
// Create new session for queued relay item.
else
{
// Get round-robin local end point for that session.
// This ensures if multiple network connections, all will be load balanced.
IPBindInfo localBindInfo = m_pLocalEndPoints.Next();
if (m_RelayMode == Relay_Mode.Dns)
{
Relay_Session session = new Relay_Session(this, localBindInfo, item);
m_pSessions.Add(session);
ThreadPool.QueueUserWorkItem(session.Start);
}
else if (m_RelayMode == Relay_Mode.SmartHost)
{
// Get smart hosts in balance mode order.
Relay_SmartHost[] smartHosts = null;
if (m_SmartHostsBalanceMode == BalanceMode.FailOver)
{
smartHosts = m_pSmartHosts.ToArray();
}
else
{
smartHosts = m_pSmartHosts.ToCurrentOrderArray();
}
Relay_Session session = new Relay_Session(this,
localBindInfo,
item,
smartHosts);
m_pSessions.Add(session);
ThreadPool.QueueUserWorkItem(session.Start);
}
}
}
}
catch (Exception x)
{
OnError(x);
}
}
}
/// <summary>
/// Default constructor.
/// </summary>
/// <param name="server">Reference to server.</param>
/// <param name="allowUDP">Specifies if UDP protocol is enabled.</param>
/// <param name="defaultPort">Specifies default port.</param>
/// <param name="defaultSSLPort">Specifies default SSL port.</param>
/// <param name="bindInfo">Bind info.</param>
public wfrm_sys_BindInfo(Server server, bool allowUDP, int defaultPort, int defaultSSLPort, IPBindInfo bindInfo) : this(server, allowUDP, true, true, defaultPort, defaultSSLPort, bindInfo)
{
}
/// <summary>
/// Completes relay session and does clean up. This method is thread-safe.
/// </summary>
/// <param name="exception">Exception happened or null if relay completed successfully.</param>
public void Dispose(Exception exception)
{
try
{
lock (this)
{
if (m_IsDisposed)
{
return;
}
try
{
m_pServer.OnSessionCompleted(this, exception);
}
catch {}
m_pServer.Sessions.Remove(this);
m_IsDisposed = true;
m_pLocalBindInfo = null;
m_pRelayItem = null;
m_pSmartHosts = null;
if (m_pSmtpClient != null)
{
m_pSmtpClient.Dispose();
m_pSmtpClient = null;
}
m_pTargets = null;
if (m_pActiveTarget != null)
{
m_pServer.RemoveIpUsage(m_pActiveTarget.Target.Address);
m_pActiveTarget = null;
}
m_pServer = null;
}
}
catch (Exception x)
{
if (m_pServer != null)
{
m_pServer.OnError(x);
}
}
}
public AddEditBindInfoForm(Server server, bool allowUDP, int defaultPort, int defaultSSLPort, IPBindInfo bindInfo) : this(server, allowUDP, true, true, defaultPort, defaultSSLPort, bindInfo)
{
}
/// <summary>
/// Default constructor.
/// </summary>
/// <param name="server">Reference to server.</param>
/// <param name="allowUDP">Specifies if UDP protocol is enabled.</param>
/// <param name="allowSSL">Specifies if SSL is enabled.</param>
/// <param name="allowChangePort">Specifies if port can be changed.</param>
/// <param name="defaultPort">Specifies default port.</param>
/// <param name="defaultSSLPort">Specifies default SSL port.</param>
/// <param name="bindInfo">Bind info.</param>
public wfrm_sys_BindInfo(Server server, bool allowUDP, bool allowSSL, bool allowChangePort, int defaultPort, int defaultSSLPort, IPBindInfo bindInfo)
{
m_SslEnabled = allowSSL;
m_DefaultPort = defaultPort;
m_DefaultSSLPort = defaultSSLPort;
InitUI();
m_pSslMode.SelectedIndex = 0;
if (!allowSSL)
{
m_pSslMode.Enabled = false;
}
if (!allowChangePort)
{
m_pPort.Enabled = false;
}
if (bindInfo != null)
{
m_pHostName.Text = bindInfo.HostName;
}
m_pProtocol.Items.Add("TCP");
if (allowUDP)
{
m_pProtocol.Items.Add("UDP");
}
if (bindInfo == null)
{
m_pProtocol.SelectedIndex = 0;
}
else
{
m_pProtocol.Text = bindInfo.Protocol.ToString();
}
foreach (IPAddress ip in server.IPAddresses)
{
m_pIP.Items.Add(new WComboBoxItem(IpToString(ip), ip));
}
if (bindInfo == null)
{
m_pIP.SelectedIndex = 0;
m_pPort.Value = defaultPort;
}
else
{
m_pCert = bindInfo.Certificate;
m_pIP.Text = IpToString(bindInfo.IP);
m_pPort.Value = bindInfo.Port;
m_pSslMode.Text = bindInfo.SslMode.ToString();
}
UpdateCertStatus();
}
/// <summary>
/// Default constructor.
/// </summary>
/// <param name="socket">Listening socket.</param>
/// <param name="bind">Bind info what acceped socket.</param>
public ListeningPoint(Socket socket, IPBindInfo bind)
{
m_pSocket = socket;
m_pBindInfo = bind;
}
public AddEditBindInfoForm(Server server, bool allowUDP, bool allowSSL, bool allowChangePort, int defaultPort, int defaultSSLPort, IPBindInfo bindInfo)
{
this.m_SslEnabled = allowSSL;
this.m_DefaultPort = defaultPort;
this.m_DefaultSSLPort = defaultSSLPort;
this.InitializeComponent();
this.m_pSslMode.SelectedIndex = 0;
if (!allowSSL)
{
this.m_pSslMode.Enabled = false;
}
if (!allowChangePort)
{
this.m_pPort.Enabled = false;
}
if (bindInfo != null)
{
this.m_pHostName.Text = bindInfo.HostName;
}
this.m_pProtocol.Items.Add("TCP");
if (allowUDP)
{
this.m_pProtocol.Items.Add("UDP");
}
if (bindInfo == null)
{
this.m_pProtocol.SelectedIndex = 0;
}
else
{
this.m_pProtocol.Text = bindInfo.Protocol.ToString();
}
IPAddress[] iPAddresses = server.IPAddresses;
for (int i = 0; i < iPAddresses.Length; i++)
{
IPAddress iPAddress = iPAddresses[i];
this.m_pIP.Items.Add(new WComboBoxItem(this.IpToString(iPAddress), iPAddress));
}
if (bindInfo == null)
{
this.m_pIP.SelectedIndex = 0;
this.m_pPort.Value = defaultPort;
}
else
{
this.m_pCert = bindInfo.Certificate;
this.m_pIP.Text = this.IpToString(bindInfo.IP);
this.m_pPort.Value = bindInfo.Port;
this.m_pSslMode.Text = bindInfo.SslMode.ToString();
}
this.UpdateCertStatus();
}
/// <summary>
/// Processes relay queue.
/// </summary>
private void Run()
{
while (m_IsRunning)
{
try
{
// Bind info has changed, create new local end points.
if (m_HasBindingsChanged)
{
m_pLocalEndPoints.Clear();
foreach (IPBindInfo binding in m_pBindings)
{
if (binding.IP == IPAddress.Any)
{
foreach (IPAddress ip in Dns.GetHostAddresses(""))
{
if (ip.AddressFamily == AddressFamily.InterNetwork)
{
IPBindInfo b = new IPBindInfo(binding.HostName,
binding.Protocol,
ip,
25);
if (!m_pLocalEndPoints.Contains(b))
{
m_pLocalEndPoints.Add(b);
}
}
}
}
else if (binding.IP == IPAddress.IPv6Any)
{
foreach (IPAddress ip in Dns.GetHostAddresses(""))
{
if (ip.AddressFamily == AddressFamily.InterNetworkV6)
{
IPBindInfo b = new IPBindInfo(binding.HostName,
binding.Protocol,
ip,
25);
if (!m_pLocalEndPoints.Contains(b))
{
m_pLocalEndPoints.Add(b);
}
}
}
}
else
{
IPBindInfo b = new IPBindInfo(binding.HostName,
binding.Protocol,
binding.IP,
25);
if (!m_pLocalEndPoints.Contains(b))
{
m_pLocalEndPoints.Add(b);
}
}
}
m_HasBindingsChanged = false;
}
// There are no local end points specified.
if (m_pLocalEndPoints.Count == 0)
{
Thread.Sleep(10);
}
// Maximum allowed relay sessions exceeded, skip adding new ones.
else if (m_MaxConnections != 0 && m_pSessions.Count >= m_MaxConnections)
{
Thread.Sleep(10);
}
else
{
Relay_QueueItem item = null;
// Get next queued message from highest possible priority queue.
foreach (Relay_Queue queue in m_pQueues)
{
item = queue.DequeueMessage();
// There is queued message.
if (item != null)
{
break;
}
// No messages in this queue, see next lower priority queue.
}
// There are no messages in any queue.
if (item == null)
{
Thread.Sleep(10);
}
// Create new session for queued relay item.
else
{
// Get round-robin local end point for that session.
// This ensures if multiple network connections, all will be load balanced.
IPBindInfo localBindInfo = m_pLocalEndPoints.Next();
if (m_RelayMode == Relay_Mode.Dns)
{
Relay_Session session = new Relay_Session(this, localBindInfo, item);
m_pSessions.Add(session);
ThreadPool.QueueUserWorkItem(session.Start);
}
else if (m_RelayMode == Relay_Mode.SmartHost)
{
// Get smart hosts in balance mode order.
Relay_SmartHost[] smartHosts = null;
if (m_SmartHostsBalanceMode == BalanceMode.FailOver)
{
smartHosts = m_pSmartHosts.ToArray();
}
else
{
smartHosts = m_pSmartHosts.ToCurrentOrderArray();
}
Relay_Session session = new Relay_Session(this,
localBindInfo,
item,
smartHosts);
m_pSessions.Add(session);
ThreadPool.QueueUserWorkItem(session.Start);
}
}
}
}
catch (Exception x)
{
OnError(x);
}
}
}
/// <summary>
/// Initialize and start new session here. Session isn't added to session list automatically,
/// session must add itself to server session list by calling AddSession().
/// </summary>
/// <param name="socket">Connected client socket.</param>
/// <param name="bindInfo">BindInfo what accepted socket.</param>
protected override void InitNewSession(Socket socket, IPBindInfo bindInfo)
{
string sessionID = Guid.NewGuid().ToString();
SocketEx socketEx = new SocketEx(socket);
if (LogCommands)
{
socketEx.Logger = new SocketLogger(socket, SessionLog);
socketEx.Logger.SessionID = sessionID;
}
FTP_Session session = new FTP_Session(sessionID, socketEx, bindInfo, this);
}
/// <summary>
/// Default constructor.
/// </summary>
/// <param name="socket">Socket.</param>
/// <param name="bindInfo">Bind info.</param>
public QueuedConnection(Socket socket,IPBindInfo bindInfo)
{
m_pSocket = socket;
m_pBindInfo = bindInfo;
}
private void LoadData()
{
try
{
Relay_Settings relay = this.m_pVirtualServer.SystemSettings.Relay;
if (relay.RelayMode == Relay_Mode.SmartHost)
{
this.m_pTabGeneral_SendSmartHost.Checked = true;
}
else
{
this.m_pTabGeneral_SendDns.Checked = true;
}
if (relay.SmartHostsBalanceMode == BalanceMode.LoadBalance)
{
this.m_pTabGeneral_SmartHostsBalanceMode.SelectedIndex = 0;
}
else
{
this.m_pTabGeneral_SmartHostsBalanceMode.SelectedIndex = 1;
}
this.m_pTabGeneral_SessionTimeout.Value = relay.SessionIdleTimeOut;
this.m_pTabGeneral_MaxConnections.Value = relay.MaximumConnections;
this.m_pTabGeneral_MaxConnsPerIP.Value = relay.MaximumConnectionsPerIP;
this.m_pTabGeneral_RelayInterval.Value = relay.RelayInterval;
this.m_pTabGeneral_RelayRetryInterval.Value = relay.RelayRetryInterval;
this.m_pTabGeneral_SendUndelWarning.Value = relay.SendUndeliveredWarningAfter;
this.m_pTabGeneral_SendUndelivered.Value = relay.SendUndeliveredAfter;
this.m_pTabGeneral_StoreUndeliveredMsgs.Checked = relay.StoreUndeliveredMessages;
this.m_pTabGeneral_UseTlsIfPossible.Checked = relay.UseTlsIfPossible;
Relay_SmartHost[] smartHosts = relay.SmartHosts;
for (int i = 0; i < smartHosts.Length; i++)
{
Relay_SmartHost relay_SmartHost = smartHosts[i];
ListViewItem listViewItem = new ListViewItem();
listViewItem.Text = relay_SmartHost.Host;
listViewItem.SubItems.Add(relay_SmartHost.Port.ToString());
listViewItem.SubItems.Add(relay_SmartHost.SslMode.ToString());
listViewItem.SubItems.Add(relay_SmartHost.UserName);
listViewItem.Tag = relay_SmartHost;
this.m_pTabGeneral_SmartHosts.Items.Add(listViewItem);
}
IPBindInfo[] binds = relay.Binds;
for (int j = 0; j < binds.Length; j++)
{
IPBindInfo iPBindInfo = binds[j];
ListViewItem listViewItem2 = new ListViewItem();
listViewItem2.Text = iPBindInfo.HostName;
if (iPBindInfo.IP.ToString() == "0.0.0.0")
{
listViewItem2.SubItems.Add("Any IPv4");
}
else if (iPBindInfo.IP.ToString() == "0:0:0:0:0:0:0:0")
{
listViewItem2.SubItems.Add("Any IPv6");
}
else
{
listViewItem2.SubItems.Add(iPBindInfo.IP.ToString());
}
listViewItem2.SubItems.Add(iPBindInfo.Port.ToString());
listViewItem2.SubItems.Add(iPBindInfo.SslMode.ToString());
listViewItem2.SubItems.Add(Convert.ToString(iPBindInfo.Certificate != null));
listViewItem2.Tag = iPBindInfo;
this.m_pTabBindings_Bindings.Items.Add(listViewItem2);
}
this.AddNotifications();
}
catch (Exception x)
{
ErrorForm errorForm = new ErrorForm(x, new StackTrace());
errorForm.ShowDialog(this);
}
}
/// <summary>
/// Starts connecting to best target.
/// </summary>
private void BeginConnect()
{
// No tagets, abort relay.
if (m_pTargets.Count == 0)
{
LogText("No relay target(s) for '" + m_pRelayItem.To + "', aborting.");
Dispose(new Exception("No relay target(s) for '" + m_pRelayItem.To + "', aborting."));
return;
}
// Maximum connections per IP limited.
if (m_pServer.MaxConnectionsPerIP > 0)
{
// For DNS or load-balnced smart host relay, search free target if any.
if (m_pServer.RelayMode == Relay_Mode.Dns || m_pServer.SmartHostsBalanceMode == BalanceMode.LoadBalance)
{
foreach (Relay_Target t in m_pTargets)
{
// Get local IP binding for remote IP.
m_pLocalBindInfo = m_pServer.GetLocalBinding(t.Target.Address);
// We have suitable local IP binding for the target.
if (m_pLocalBindInfo != null)
{
// We found free target, stop searching.
if (m_pServer.TryAddIpUsage(t.Target.Address))
{
m_pActiveTarget = t;
m_pTargets.Remove(t);
break;
}
// Connection per IP limit reached.
else
{
LogText("Skipping relay target (" + t.HostName + "->" + t.Target.Address + "), maximum connections to the specified IP has reached.");
}
}
// No suitable local IP binding, try next target.
else
{
LogText("Skipping relay target (" + t.HostName + "->" + t.Target.Address + "), no suitable local IPv4/IPv6 binding.");
}
}
}
// Smart host fail-over mode, just check if it's free.
else
{
// Get local IP binding for remote IP.
m_pLocalBindInfo = m_pServer.GetLocalBinding(m_pTargets[0].Target.Address);
// We have suitable local IP binding for the target.
if (m_pLocalBindInfo != null)
{
// Smart host IP limit not reached.
if (m_pServer.TryAddIpUsage(m_pTargets[0].Target.Address))
{
m_pActiveTarget = m_pTargets[0];
m_pTargets.RemoveAt(0);
}
// Connection per IP limit reached.
else
{
LogText("Skipping relay target (" + m_pTargets[0].HostName + "->" + m_pTargets[0].Target.Address + "), maximum connections to the specified IP has reached.");
}
}
// No suitable local IP binding, try next target.
else
{
LogText("Skipping relay target (" + m_pTargets[0].HostName + "->" + m_pTargets[0].Target.Address + "), no suitable local IPv4/IPv6 binding.");
}
}
}
// Just get first target.
else
{
// Get local IP binding for remote IP.
m_pLocalBindInfo = m_pServer.GetLocalBinding(m_pTargets[0].Target.Address);
// We have suitable local IP binding for the target.
if (m_pLocalBindInfo != null)
{
m_pActiveTarget = m_pTargets[0];
m_pTargets.RemoveAt(0);
}
// No suitable local IP binding, try next target.
else
{
LogText("Skipping relay target (" + m_pTargets[0].HostName + "->" + m_pTargets[0].Target.Address + "), no suitable local IPv4/IPv6 binding.");
}
}
// We don't have suitable local IP end point for relay target.
// This may heppen for example: if remote server supports only IPv6 and we don't have local IPv6 local end point.
if (m_pLocalBindInfo == null)
{
LogText("No suitable IPv4/IPv6 local IP endpoint for relay target.");
Dispose(new Exception("No suitable IPv4/IPv6 local IP endpoint for relay target."));
return;
}
// If all targets has exeeded maximum allowed connection per IP address, end relay session,
// next relay cycle will try to relay again.
if (m_pActiveTarget == null)
{
LogText("All targets has exeeded maximum allowed connection per IP address, skip relay.");
Dispose(new Exception("All targets has exeeded maximum allowed connection per IP address, skip relay."));
return;
}
// Set SMTP host name.
m_pSmtpClient.LocalHostName = m_pLocalBindInfo.HostName;
// Start connecting to remote end point.
TCP_Client.ConnectAsyncOP connectOP = new TCP_Client.ConnectAsyncOP(new IPEndPoint(m_pLocalBindInfo.IP, 0), m_pActiveTarget.Target, false, null);
connectOP.CompletedAsync += delegate(object s, EventArgs <TCP_Client.ConnectAsyncOP> e){
ConnectCompleted(connectOP);
};
if (!m_pSmtpClient.ConnectAsync(connectOP))
{
ConnectCompleted(connectOP);
}
}