// this method is called from Parallel Invoke, so multiple threads will be executing this concurrently
private static void SendMailFromUser(SendMailFromUserArgs args)
{
var fromMu = args.User;
// make sure creds are set and setup SMTP client instance for sender to use this session..
if (!(fromMu.networkCred is NetworkCredential))
{
fromMu.networkCred = new NetworkCredential(fromMu.sAMAccountName, args.defaultPassword, DirectoryEntryContext.DefaultDomain);
}
using (var curSmtpClient = new SmtpClient(MailUsers.dblist[fromMu.exchangeDBIndex].CurrentServer, 587))
{
curSmtpClient.Credentials = fromMu.networkCred;
var from = new MailAddress(fromMu.smtpAddress, fromMu.displayName);
var progress = args.progress;
var bw = args.backgroundWorker;
var dwea = args.doWorkEventArgs;
var r = args.randomInstance;
var mailBodyStyle = new BodyCompositionRules();
// only trace here if worker is not being cancelled. Otherwise if verbose tracing is enabled it can hang UI.
if (!dwea.Cancel)
{
ts.TraceEvent(TraceEventType.Verbose, 0, "Starting sending mail from {0}", fromMu.displayName);
}
foreach (var mal in senderAssignments[fromMu])
{
// check for user cancellation
if (bw.CancellationPending)
{
if (!dwea.Cancel)
{
dwea.Cancel = true;
}
Interlocked.CompareExchange(ref progress.cancelled, 1, 0);
bw.ReportProgress(0, progress);
return;
}
// check for too many errors
if (progress.consecutiveErrorsSending >= maxConsecutiveFailuresSending)
{
if (!dwea.Cancel)
{
dwea.Cancel = true;
}
if (Interlocked.Exchange(ref progress.cancelled, 2) == 0)
{
//only trace this once, if not already pending cancel
ts.TraceEvent(TraceEventType.Critical, 0, "Stopping after {0} consecutive errors", maxConsecutiveFailuresSending);
}
bw.ReportProgress(0, progress);
return;
}
// compose message
var message = new MailMessage(from, mal[0]);
if (mal.Count > 1)
{
for (int i = 1; i < mal.Count; i++)
{
message.To.Add(mal[i]);
}
}
message.Body = getRandomBody(r, mailBodyStyle);
message.Subject = getRandomSubject(r);
// attachments
if (r.Next(1, 101) > (100 - args.percentChanceOfAttachments))
{
message.Attachments.Add(getRandomAttachment(r, mailBodyStyle));
if (r.Next(1, 101) > 50) // 50 percent chance of more than one attachment.
{
var attachments = r.Next(1, args.maxAttachments + 1);
for (int i = 1; i < attachments; i++) // start i=1 because we already have 1 attachment
{
message.Attachments.Add(getRandomAttachment(r, mailBodyStyle));
}
}
}
// send
try
{
curSmtpClient.Send(message);
Interlocked.Increment(ref progress.messagesSent);
Interlocked.Exchange(ref progress.consecutiveErrorsSending, 0);
}
catch (Exception e)
{
Interlocked.Increment(ref progress.errorsSending);
Interlocked.Increment(ref progress.consecutiveErrorsSending);
ts.TraceEvent(TraceEventType.Error, 0, "sending message from user {0}. {1}", fromMu.displayName, e.ToString());
}
finally
{
if (message != null)
{
message.Dispose();
}
}
bw.ReportProgress(0, progress);
}
Interlocked.Increment(ref progress.sendersDone);
ts.TraceEvent(TraceEventType.Verbose, 0, "Finished sending from {0}", fromMu.displayName);
bw.ReportProgress(0, progress);
}
}
public static void Mail(GenMailArgs args, object sender, DoWorkEventArgs dwea)
{
ts.TraceEvent(TraceEventType.Verbose, 0, "Gen.Mail started.");
// set connection limit higher
ServicePointManager.DefaultConnectionLimit = 100;
ts.TraceEvent(TraceEventType.Information, 0, "Initializing...");
mailUsers = MailUsers.GetAllOUMailUsers(args.selectedOUPath);
ts.TraceEvent(TraceEventType.Verbose, 0, "Got list of {0} users.", mailUsers.Count);
// lower maxadditionalrecips if there are not enough users
if (mailUsers.Count - 1 < args.maxAdditionalRecips)
{
args.maxAdditionalRecips = mailUsers.Count - 1;
}
// load and decompress word list if necessary
if (words == null)
{
LoadDictionary();
}
ts.TraceEvent(TraceEventType.Information, 0, "Preparing recipient lists...");
var progress = new GenMailProgress();
var bw = sender as BackgroundWorker;
mailCounter = 0;
// clear dictionaries in case process was interrupted
senderAssignments.Clear();
mailsRemainingForRecipient.Clear();
// random instance to generate seeds for other random instances
var rs = new Random();
// populate mails remaining dictionary
foreach (GenMailUser mu in mailUsers)
{
if (bw.CancellationPending == true)
{
dwea.Cancel = true;
return;
}
mailsRemainingForRecipient.Add(mu.smtpAddress, args.InitialItems);
}
foreach (GenMailUser mu in mailUsers)
{
var to = new MailAddress(mu.smtpAddress, mu.displayName);
while (mailsRemainingForRecipient[mu.smtpAddress] > 0)
{
if (bw.CancellationPending == true)
{
dwea.Cancel = true;
return;
}
// keep track of # of emails to send for accurate progress later...
mailCounter++;
// get random user for from address
GenMailUser rmu;
do
{
rmu = mailUsers[rs.Next(mailUsers.Count)];
}while (rmu == mu && mailUsers.Count > 1);
var recipList = new List <MailAddress>()
{
to
};
// decrement mail count
mailsRemainingForRecipient[mu.smtpAddress]--;
// optionally add some random recipients if there are enough people in the mailusers list
if (args.maxAdditionalRecips > 0 && rs.Next(1, 101) > (100 - args.percentChanceOfExtraRecips))
{
// add 1 - configured max
var extraRecips = rs.Next(1, args.maxAdditionalRecips + 1);
// keep track of additional recips that we don't allow dupes
var genMailRecips = new List <GenMailUser>();
for (int i = 0; i < extraRecips; i++)
{
GenMailUser recip;
do
{
recip = mailUsers[rs.Next(mailUsers.Count)];
}while (recip == mu || genMailRecips.Contains(recip)); // don't want duplicates
if (mailsRemainingForRecipient[recip.smtpAddress] > 0)
{
recipList.Add(new MailAddress(recip.smtpAddress, recip.displayName));
mailsRemainingForRecipient[recip.smtpAddress]--;
genMailRecips.Add(recip);
}
}
}
if (senderAssignments.ContainsKey(rmu))
{
senderAssignments[rmu].Add(recipList);
}
else
{
var assignments = new List <List <MailAddress> >();
assignments.Add(recipList);
senderAssignments.Add(rmu, assignments);
}
}
}
// free up memory
mailsRemainingForRecipient.Clear();
var tasks = senderAssignments.Count;
progress.numberOfSenders = tasks;
progress.numberOfMailboxes = mailUsers.Count;
progress.numberOfMailsToSend = mailCounter;
var actions = new Action[tasks];
int actionIndex = 0;
foreach (var senderGenMailUser in senderAssignments.Keys)
{
if (bw.CancellationPending == true)
{
dwea.Cancel = true;
return;
}
var smfua = new SendMailFromUserArgs();
smfua.backgroundWorker = bw;
smfua.doWorkEventArgs = dwea;
smfua.progress = progress;
smfua.User = senderGenMailUser;
smfua.randomInstance = new Random(rs.Next());
smfua.defaultPassword = args.DefaultPassword;
smfua.percentChanceOfAttachments = args.percentChanceOfAttachments;
smfua.maxAttachments = args.maxAttachments;
actions[actionIndex] = () =>
{
SendMailFromUser(smfua);
};
actionIndex++;
}
ts.TraceEvent(TraceEventType.Information, 0, "Starting send mail threads...");
if (mailCounter < args.InitialItems * mailUsers.Count)
{
ts.TraceEvent(TraceEventType.Information, 0, "Since some items will be received by multiple mailboxes,\n {0:N0} items per mailbox can be achieved by sending {1:N0} item(s) total.", args.InitialItems, mailCounter);
}
var opts = new ParallelOptions();
//sanity check thread count
if (args.Threads > 0 && args.Threads <= 100)
{
opts.MaxDegreeOfParallelism = args.Threads;
}
else
{
opts.MaxDegreeOfParallelism = 3;
}
// invoke threads. This blocks until all complte
Parallel.Invoke(opts, actions);
// clear sender assignments
senderAssignments.Clear();
if (dwea.Cancel)
{
if (progress.cancelled == 2)
{
ts.TraceEvent(TraceEventType.Information, 0, "Mailbox population cancelled due to too many consecutive errors.");
}
if (progress.cancelled == 1)
{
ts.TraceEvent(TraceEventType.Information, 0, "Mailbox population cancelled by user.");
}
}
else
{
ts.TraceEvent(TraceEventType.Information, 0, "Done sending mail.");
if (mailCounter < args.InitialItems * mailUsers.Count)
{
ts.TraceEvent(TraceEventType.Information, 0, "Some messages were sent to multiple mailboxes.\n Sent {0:N0} item(s) total in order for each mailbox to receive {1:N0} item(s).", mailCounter, args.InitialItems);
}
}
}