/// <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 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;
}
}
