/// <summary>
/// Default constructor.
/// </summary>
public Server()
{
m_pClient = new TCP_Client();
m_pLockSynchronizer = m_pClient;
}
/// <summary>
/// Starts operation processing.
/// </summary>
/// <param name="owner">Owner TCP client.</param>
/// <returns>Returns true if asynchronous operation in progress or false if operation completed synchronously.</returns>
/// <exception cref="ArgumentNullException">Is raised when <b>owner</b> is null reference.</exception>
internal bool Start(TCP_Client owner)
{
if(owner == null){
throw new ArgumentNullException("owner");
}
m_pTcpClient = owner;
SetState(AsyncOP_State.Active);
try{
m_pSslStream = new SslStream(m_pTcpClient.m_pTcpStream.SourceStream,false,this.RemoteCertificateValidationCallback);
m_pSslStream.BeginAuthenticateAsClient("dummy",this.BeginAuthenticateAsClientCompleted,null);
}
catch(Exception x){
m_pException = x;
SetState(AsyncOP_State.Completed);
}
// Set flag rise CompletedAsync event flag. The event is raised when async op completes.
// If already completed sync, that flag has no effect.
lock(m_pLock){
m_RiseCompleted = true;
return m_State == AsyncOP_State.Active;
}
}
/// <summary>
/// Starts operation processing.
/// </summary>
/// <param name="owner">Owner TCP client.</param>
/// <returns>Returns true if asynchronous operation in progress or false if operation completed synchronously.</returns>
/// <exception cref="ArgumentNullException">Is raised when <b>owner</b> is null reference.</exception>
internal bool Start(TCP_Client owner)
{
if(owner == null){
throw new ArgumentNullException("owner");
}
m_pTcpClient = owner;
SetState(AsyncOP_State.Active);
try{
// Create socket.
if(m_pRemoteEP.AddressFamily == AddressFamily.InterNetwork){
m_pSocket = new Socket(AddressFamily.InterNetwork,SocketType.Stream,ProtocolType.Tcp);
m_pSocket.ReceiveTimeout = m_pTcpClient.m_Timeout;
m_pSocket.SendTimeout = m_pTcpClient.m_Timeout;
}
else if(m_pRemoteEP.AddressFamily == AddressFamily.InterNetworkV6){
m_pSocket = new Socket(AddressFamily.InterNetworkV6,SocketType.Stream,ProtocolType.Tcp);
m_pSocket.ReceiveTimeout = m_pTcpClient.m_Timeout;
m_pSocket.SendTimeout = m_pTcpClient.m_Timeout;
}
// Bind socket to the specified end point.
if(m_pLocalEP != null){
m_pSocket.Bind(m_pLocalEP);
}
m_pTcpClient.LogAddText("Connecting to " + m_pRemoteEP.ToString() + ".");
// Start connecting.
m_pSocket.BeginConnect(m_pRemoteEP,this.BeginConnectCompleted,null);
}
catch(Exception x){
m_pException = x;
CleanupSocketRelated();
m_pTcpClient.LogAddException("Exception: " + x.Message,x);
SetState(AsyncOP_State.Completed);
return false;
}
// Set flag rise CompletedAsync event flag. The event is raised when async op completes.
// If already completed sync, that flag has no effect.
lock(m_pLock){
m_RiseCompleted = true;
return m_State == AsyncOP_State.Active;
}
}
/// <summary>
/// Cleans up any resource being used.
/// </summary>
public void Dispose()
{
if(m_State == AsyncOP_State.Disposed){
return;
}
SetState(AsyncOP_State.Disposed);
m_pException = null;
m_pLocalEP = null;
m_pRemoteEP = null;
m_SSL = false;
m_pCertCallback = null;
m_pTcpClient = null;
m_pSocket = null;
m_pStream = null;
this.CompletedAsync = null;
}
/// <summary>
/// Is called when EHLO/HELO command has completed.
/// </summary>
/// <param name="op">Asynchronous operation.</param>
/// <exception cref="ArgumentNullException">Is raised when <b>op</b> is null reference.</exception>
private void ConnectCompleted(TCP_Client.ConnectAsyncOP op)
{
if(op == null){
throw new ArgumentNullException("op");
}
try{
// Connect failed.
if(op.Error != null){
try{
// Release IP usage.
m_pServer.RemoveIpUsage(m_pActiveTarget.Target.Address);
m_pActiveTarget = null;
// Connect failed, if there are more target IPs, try next one.
if(!this.IsDisposed && !this.IsConnected && m_pTargets.Count > 0){
BeginConnect();
}
else{
Dispose(op.Error);
}
}
catch(Exception x1){
Dispose(x1);
}
}
// Connect suceeded.
else{
// Do EHLO/HELO.
string hostName = string.IsNullOrEmpty(m_pLocalBindInfo.HostName) ? Dns.GetHostName() : m_pLocalBindInfo.HostName;
SMTP_Client.EhloHeloAsyncOP ehloOP = new SMTP_Client.EhloHeloAsyncOP(hostName);
ehloOP.CompletedAsync += delegate(object s,EventArgs<SMTP_Client.EhloHeloAsyncOP> e){
EhloCommandCompleted(ehloOP);
};
if(!m_pSmtpClient.EhloHeloAsync(ehloOP)){
EhloCommandCompleted(ehloOP);
}
}
}
catch(Exception x){
Dispose(x);
}
}
/// <summary>
/// Starts flow processing.
/// </summary>
internal void Start()
{
// Move processing to thread pool.
AutoResetEvent startLock = new AutoResetEvent(false);
ThreadPool.QueueUserWorkItem(new WaitCallback(delegate(object state){
lock(m_pLock){
startLock.Set();
// TCP / TLS client, connect to remote end point.
if(!m_IsServer && m_Transport != SIP_Transport.UDP){
try{
TCP_Client client = new TCP_Client();
client.Connect(m_pLocalEP,m_pRemoteEP,m_Transport == SIP_Transport.TLS);
m_pTcpSession = client;
BeginReadHeader();
}
catch{
Dispose();
}
}
}
}));
startLock.WaitOne();
startLock.Close();
}
