/// <summary>
/// Raises event MessageStoringCompleted.
/// </summary>
/// <param name="session">Reference to calling SMTP session.</param>
/// <param name="errorText">Null if no errors, otherwise conatians error text. If errors happened that means that messageStream is incomplete.</param>
/// <param name="messageStream">Stream where message was stored.</param>
internal MessageStoringCompleted_eArgs OnMessageStoringCompleted(SMTP_Session session, string errorText, Stream messageStream)
{
MessageStoringCompleted_eArgs eArgs = new MessageStoringCompleted_eArgs(session, errorText, messageStream);
if (this.MessageStoringCompleted != null)
{
this.MessageStoringCompleted(this, eArgs);
}
return(eArgs);
}
/// <summary>
/// Raises event MessageStoringCompleted.
/// </summary>
/// <param name="session">Reference to calling SMTP session.</param>
/// <param name="errorText">Null if no errors, otherwise conatians error text. If errors happened that means that messageStream is incomplete.</param>
/// <param name="messageStream">Stream where message was stored.</param>
internal MessageStoringCompleted_eArgs OnMessageStoringCompleted(SMTP_Session session,string errorText,Stream messageStream)
{
MessageStoringCompleted_eArgs eArgs = new MessageStoringCompleted_eArgs(session,errorText,messageStream);
if(this.MessageStoringCompleted != null){
this.MessageStoringCompleted(this,eArgs);
}
return eArgs;
}
/// <summary>
///
/// </summary>
/// <param name="sender"></param>
/// <param name="recipient"></param>
/// <param name="userName"></param>
/// <param name="storeFolder">Message folder where message will be stored. For example 'Inbox'.</param>
/// <param name="msgStream"></param>
/// <param name="e">Event data.</param>
internal void ProcessUserMsg(string sender,string recipient,string userName,string storeFolder,Stream msgStream,MessageStoringCompleted_eArgs e)
{
string userID = m_pApi.GetUserID(userName);
// This value can be null only if user deleted during this session, so just skip next actions.
if(userID == null){
return;
}
#region User Message rules
Stream filteredMsgStream = msgStream;
filteredMsgStream.Position = 0;
Mime mime = null;
try{
mime = Mime.Parse(filteredMsgStream);
}
// Invalid message syntax, block such message.
catch{
e.ServerReply.ErrorReply = true;
e.ServerReply.ReplyText = "Invalid message structure/syntax, message blocked !";
return;
}
string[] to = new string[]{recipient};
//--- Check User Message Rules --------------------------------------------------------------//
bool deleteMessage = false;
string smtpErrorText = null;
// Loop rules
foreach(DataRowView drV_Rule in m_pApi.GetUserMessageRules(userName)){
// Reset stream position
filteredMsgStream.Position = 0;
if(Convert.ToBoolean(drV_Rule["Enabled"])){
string ruleID = drV_Rule["RuleID"].ToString();
GlobalMessageRule_CheckNextRule_enum checkNextIf = (GlobalMessageRule_CheckNextRule_enum)(int)drV_Rule["CheckNextRuleIf"];
string matchExpression = drV_Rule["MatchExpression"].ToString();
// e may be null if server internal method call and no actual session !
SMTP_Session session = null;
if(e != null){
session = e.Session;
}
GlobalMessageRuleProcessor ruleEngine = new GlobalMessageRuleProcessor();
bool matches = ruleEngine.Match(matchExpression,sender,to,session,mime,(int)filteredMsgStream.Length);
if(matches){
// Do actions
GlobalMessageRuleActionResult result = ruleEngine.DoActions(
m_pApi.GetUserMessageRuleActions(userID,ruleID),
this,
filteredMsgStream,
sender,
to
);
if(result.DeleteMessage){
deleteMessage = true;
}
if(result.StoreFolder != null){
storeFolder = result.StoreFolder;
}
if(result.ErrorText != null){
smtpErrorText = result.ErrorText;
}
}
//--- See if we must check next rule -------------------------------------------------//
if(checkNextIf == GlobalMessageRule_CheckNextRule_enum.Always){
// Do nothing
}
else if(checkNextIf == GlobalMessageRule_CheckNextRule_enum.IfMatches && !matches){
break;
}
else if(checkNextIf == GlobalMessageRule_CheckNextRule_enum.IfNotMatches && matches){
break;
}
//------------------------------------------------------------------------------------//
}
}
// Return error to connected client
if(smtpErrorText != null){
e.ServerReply.ErrorReply = true;
e.ServerReply.ReplyText = smtpErrorText;
return;
}
// Just don't store message
if(deleteMessage){
return;
}
// Reset stream position
filteredMsgStream.Position = 0;
//--- End of Global Rules -------------------------------------------------------------------//
#endregion
// ToDo: User message filtering
#region User message filtering
//--- Filter message -----------------------------------------------//
/* MemoryStream filteredMsgStream = msgStream;
DataView dvFilters = m_pApi.GetFilters();
dvFilters.RowFilter = "Enabled=true AND Type=ISmtpUserMessageFilter";
dvFilters.Sort = "Cost";
foreach(DataRowView drViewFilter in dvFilters){
string assemblyFile = drViewFilter.Row["Assembly"].ToString();
// File is without path probably, try to load it from filters folder
if(!File.Exists(assemblyFile)){
assemblyFile = m_SartUpPath + "\\Filters\\" + assemblyFile;
}
Assembly ass = Assembly.LoadFrom(assemblyFile);
Type tp = ass.GetType(drViewFilter.Row["ClassName"].ToString());
object filterInstance = Activator.CreateInstance(tp);
ISmtpMessageFilter filter = (ISmtpMessageFilter)filterInstance;
FilterResult result = filter.Filter(filteredMsgStream,out filteredMsgStream,sender,recipient,m_pApi);
switch(result)
{
case FilterResult.DontStore:
return; // Just skip messge, act as message is stored
case FilterResult.Error:
// ToDO: Add implementaion here or get rid of it (use exception instead ???).
return;
}
}*/
//---------------------------------------------------------------//
#endregion
try{
m_pApi.StoreMessage("system",userName,storeFolder,filteredMsgStream,DateTime.Now,IMAP_MessageFlags.Recent);
}
catch{
// Storing probably failed because there isn't such folder, just store to user inbox.
m_pApi.StoreMessage("system",userName,"Inbox",filteredMsgStream,DateTime.Now,IMAP_MessageFlags.Recent);
}
}
/// <summary>
/// Processes and stores message.
/// </summary>
/// <param name="sender">Mail from.</param>
/// <param name="recipient">Recipient to.</param>
/// <param name="msgStream">Message stream. Stream position must be there where message begins.</param>
/// <param name="e">Event data.</param>
public void ProcessAndStoreMessage(string sender,string[] recipient,Stream msgStream,MessageStoringCompleted_eArgs e)
{
#region Global Filtering stuff
//--- Filter message -----------------------------------------------//
Stream filteredMsgStream = msgStream;
DataView dvFilters = m_pApi.GetFilters();
dvFilters.RowFilter = "Enabled=true AND Type='ISmtpMessageFilter'";
dvFilters.Sort = "Cost";
foreach(DataRowView drViewFilter in dvFilters){
try{
filteredMsgStream.Position = 0;
string assemblyFile = API_Utlis.PathFix(drViewFilter.Row["Assembly"].ToString());
// File is without path probably, try to load it from filters folder
if(!File.Exists(assemblyFile)){
assemblyFile = API_Utlis.PathFix(m_pOwnerServer.StartupPath + "\\Filters\\" + assemblyFile);
}
Assembly ass = Assembly.LoadFrom(assemblyFile);
Type tp = ass.GetType(drViewFilter.Row["ClassName"].ToString());
object filterInstance = Activator.CreateInstance(tp);
ISmtpMessageFilter filter = (ISmtpMessageFilter)filterInstance;
string errorText = "";
SMTP_Session session = null;
if(e != null){
session = e.Session;
}
FilterResult result = filter.Filter(filteredMsgStream,out filteredMsgStream,sender,recipient,m_pApi,session,out errorText);
if(result == FilterResult.DontStore){
// Just skip messge, act as message is stored
e.ServerReply.ReplyText = "Message just discarded by filter !";
return;
}
else if(result == FilterResult.Error){
if(e != null){
e.ServerReply.ErrorReply = true;
e.ServerReply.ReplyText = errorText;
}
else{
// NOTE: 26.01.2006 - e maybe null if that method is called server internally and no smtp session.
}
return;
}
// Filter didn't return message stream
if(filteredMsgStream == null){
e.ServerReply.ErrorReply = true;
e.ServerReply.ReplyText = "Message rejected by filter";
return;
}
}
catch(Exception x){
// Filtering failed, log error and allow message through.
OnError(x);
}
}
//---------------------------------------------------------------//
#endregion
#region Global Message Rules
filteredMsgStream.Position = 0;
Mime mime = null;
try{
mime = Mime.Parse(filteredMsgStream);
}
// Invalid message syntax, block such message.
catch{
e.ServerReply.ErrorReply = true;
e.ServerReply.ReplyText = "Invalid message structure/syntax, message blocked !";
return;
}
string[] to = recipient;
//--- Check Global Message Rules --------------------------------------------------------------//
bool deleteMessage = false;
string storeFolder = "Inbox";
string smtpErrorText = null;
// Loop rules
foreach(DataRowView drV_Rule in m_pApi.GetGlobalMessageRules()){
// Reset stream position
filteredMsgStream.Position = 0;
if(Convert.ToBoolean(drV_Rule["Enabled"])){
string ruleID = drV_Rule["RuleID"].ToString();
GlobalMessageRule_CheckNextRule_enum checkNextIf = (GlobalMessageRule_CheckNextRule_enum)(int)drV_Rule["CheckNextRuleIf"];
string matchExpression = drV_Rule["MatchExpression"].ToString();
// e may be null if server internal method call and no actual session !
SMTP_Session session = null;
if(e != null){
session = e.Session;
}
GlobalMessageRuleProcessor ruleEngine = new GlobalMessageRuleProcessor();
bool matches = ruleEngine.Match(matchExpression,sender,to,session,mime,(int)filteredMsgStream.Length);
if(matches){
// Do actions
GlobalMessageRuleActionResult result = ruleEngine.DoActions(
m_pApi.GetGlobalMessageRuleActions(ruleID),
this,
filteredMsgStream,
sender,
to
);
if(result.DeleteMessage){
deleteMessage = true;
}
if(result.StoreFolder != null){
storeFolder = result.StoreFolder;
}
if(result.ErrorText != null){
smtpErrorText = result.ErrorText;
}
}
//--- See if we must check next rule -------------------------------------------------//
if(checkNextIf == GlobalMessageRule_CheckNextRule_enum.Always){
// Do nothing
}
else if(checkNextIf == GlobalMessageRule_CheckNextRule_enum.IfMatches && !matches){
break;
}
else if(checkNextIf == GlobalMessageRule_CheckNextRule_enum.IfNotMatches && matches){
break;
}
//------------------------------------------------------------------------------------//
}
}
// Return error to connected client
if(smtpErrorText != null){
e.ServerReply.ErrorReply = true;
e.ServerReply.ReplyText = smtpErrorText;
return;
}
// Just don't store message
if(deleteMessage){
return;
}
// Reset stream position
filteredMsgStream.Position = 0;
//--- End of Global Rules -------------------------------------------------------------------//
#endregion
#region Construct final recipients
// Construct final recipients, replace mailing list members with actual addresses.
List<string> finalRecipients = new List<string>();
foreach(string r in recipient){
string emailAddress = r;
// If domain isn't specified, add default domain
if(emailAddress.IndexOf("@") == -1){
emailAddress += "@" + m_SMTP_DefaultDomain;
}
// This is mailing list address, get member email addresses
if(m_pApi.MailingListExists(emailAddress)){
List<string> processedMailignLists = new List<string>();
Queue<string> processQueue = new Queue<string>();
processQueue.Enqueue(emailAddress);
// Loop while there are mailing lists or nested mailing list available
while(processQueue.Count > 0){
string mailingList = processQueue.Dequeue();
processedMailignLists.Add(mailingList);
// Process mailing list members
foreach(DataRowView drV in m_pApi.GetMailingListAddresses(mailingList)){
string member = drV["Address"].ToString();
// Member is asteric pattern matching server emails
if(member.IndexOf('*') > -1){
DataView dvServerAddresses = m_pApi.GetUserAddresses("");
foreach(DataRowView drvServerAddress in dvServerAddresses){
string serverAddress = drvServerAddress["Address"].ToString();
if(SCore.IsAstericMatch(member,serverAddress)){
if(!finalRecipients.Contains(serverAddress)){
finalRecipients.Add(serverAddress);
}
}
}
}
// Member is user or group, not email address
else if(member.IndexOf('@') == -1){
// Member is group, replace with actual users
if(m_pApi.GroupExists(member)){
foreach(string user in m_pApi.GetGroupUsers(member)){
if(!finalRecipients.Contains(user)){
finalRecipients.Add(user);
}
}
}
// Member is user
else if(m_pApi.UserExists(member)){
if(!finalRecipients.Contains(member)){
finalRecipients.Add(member);
}
}
// Unknown member, do nothing
else{
}
}
// Member is nested mailing list
else if(m_pApi.MailingListExists(member)){
// Don't proccess poroccessed mailing lists any more, causes infinite loop
if(!processedMailignLists.Contains(member)){
processQueue.Enqueue(member);
}
}
// Member is normal email address
else{
if(!finalRecipients.Contains(member)){
finalRecipients.Add(member);
}
}
}
}
}
// Normal email address
else{
if(!finalRecipients.Contains(emailAddress)){
finalRecipients.Add(emailAddress);
}
}
}
// TODO: ???
// Map routing
// Map local server email address to user.
#endregion
// Store individual message to each recipient
foreach(string r in finalRecipients){
ProcessRecipientMsg(sender,r,storeFolder,filteredMsgStream,e);
}
}
/// <summary>
/// Is called by SMTP server if server has completed incoming message storing.
/// </summary>
/// <param name="sender"></param>
/// <param name="e">Event data.</param>
private void SMTP_Server_MessageStoringCompleted(object sender,MessageStoringCompleted_eArgs e)
{
string fileName = ((FileStream)e.MessageStream).Name;
try{
// Message stored successfully to file, process it.
if(e.ErrorText == null){
e.MessageStream.Position = 0;
ProcessAndStoreMessage(e.Session.MailFrom,e.Session.MailTo,e.MessageStream,e);
}
}
catch(Exception x){
Error.DumpError(this.Name,x,new System.Diagnostics.StackTrace());
e.ServerReply.ErrorReply = true;
e.ServerReply.ReplyText = "Error storing message";
}
finally{
// Close file and delete it.
((FileStream)e.MessageStream).Dispose();
File.Delete(fileName);
}
}
/// <summary>
///
/// </summary>
/// <param name="sender"></param>
/// <param name="recipient"></param>
/// <param name="storeFolder">Message folder where message will be stored. For example 'Inbox'.</param>
/// <param name="msgStream"></param>
/// <param name="e">Event data.</param>
private void ProcessRecipientMsg(string sender,string recipient,string storeFolder,Stream msgStream,MessageStoringCompleted_eArgs e)
{
msgStream.Position = 0;
string eAddress = recipient;
string mailbox = "";
bool relay = false;
string forwardHost = null;
// We have local user instead of emailaddress
if(recipient.IndexOf('@') == -1){
mailbox = recipient;
}
else{
mailbox = m_pApi.MapUser(eAddress);
}
// If not valid local mailbox or relay message.
if(mailbox == null){
#region Check Routing
bool routingDone = false;
DataView dv = m_pApi.GetRoutes();
foreach(DataRowView drV in dv){
// We have matching route
if(Convert.ToBoolean(drV["Enabled"]) && SCore.IsAstericMatch(drV["Pattern"].ToString(),eAddress)){
RouteAction_enum action = (RouteAction_enum)Convert.ToInt32(drV["Action"]);
byte[] actionData = (byte[])drV["ActionData"];
#region RouteToEmail
if(action == RouteAction_enum.RouteToEmail){
XmlTable table = new XmlTable("ActionData");
table.Parse(actionData);
eAddress = table.GetValue("EmailAddress");
relay = true;
}
#endregion
#region RouteToHost
else if(action == RouteAction_enum.RouteToHost){
XmlTable table = new XmlTable("ActionData");
table.Parse(actionData);
forwardHost = table.GetValue("Host") + ":" + table.GetValue("Port");
relay = true;
}
#endregion
#region RouteToMailbox
else if(action == RouteAction_enum.RouteToMailbox){
XmlTable table = new XmlTable("ActionData");
table.Parse(actionData);
mailbox = table.GetValue("Mailbox");
}
#endregion
routingDone = true;
break;
}
}
// Routing not done, handle message normally.
if(!routingDone){
// Local message, but won't match to any mailbox. We never should reach there,
// this may happen if routing deleted between session, just skip that message.
if(m_pApi.DomainExists(eAddress)){
return;
}
else{
relay = true;
}
}
#endregion
}
if(relay){
this.RelayServer.StoreRelayMessage(msgStream,forwardHost,sender,eAddress);
}
else{
ProcessUserMsg(sender,eAddress,mailbox,storeFolder,msgStream,e);
}
}
