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TIME_WAIT after socket is closed?

Posted on 2002-04-09
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Last Modified: 2008-02-01
I have a server and client socket program written under Visual C++ 5.0.

After sending data, I successfully closed client's socket and server's socket by using <closesocket> function provided by <winsock2.h>.

But when I netstat -a under windows platform. I can see some of the port that previously been established showing "TIME_WAIT". It this cause by my program???

If it is cause by my program, how come only some of the port is "PENDING" there. Because I tried to do a loop that open, send data, and close 30 socket in a time. Only 5 socket show "TIME_WAIT". After certain time, I netstat again the "TIME_WAIT" disappear.

Guys, any idea?

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Question by:realman1
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Accepted Solution

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mnashadka earned 10 total points
ID: 6932216
TIME_WAIT is just the state that the socket goes into to ensure that packets are not accepted later from the same host to a different socket connection.  The TCP layer keeps the socket semi-open so that packets arriving late are bounced off of that socket and don't magically get accepted by a different socket that's opened between the same 2 servers.  It's nothing to worry about, and it'll go away.
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Expert Comment

by:griessh
ID: 6960634
Dear realman1

I think you forgot this question. I will ask Community Support to close it unless you finalize it within 7 days. You can always request to keep this question open. But remember, experts can only help you if you provide feedback to their questions.
Unless there is objection or further activity,  I will suggest to accept

     "mnashadka"

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Author Comment

by:realman1
ID: 6961604
Dear mnashadka,
  I forgot to reply you. I refer to other sources and found out your answer is the correct one. But just too busy for it until forgot to give you credit. Sorry for that and thank you for your answer. :)
  Have a nice day.
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