udpclient receive port# ?

[swartzbill2000]

If I do this:
Dim receiver As New UdpClient()
Then the documentation says the system will pick a port. How can I
extract the chosen port number from receiver?
Bill

[Miro]

Bill,

This is a great example:
http://www.codeproject.com/vb/net/UDP_Send_Receive.asp

I used it...but basically you do this:

'in my case i made it a public var
Public SocketNO As Integer = 1234 ' where 1234 is your socket no u want
Public RemoteIpEndPoin t As New _
System.Net.IPEn dPoint(System.N et.IPAddress.An y, SocketNO)

'then the sub i had as a receiver
Public Sub Receive_Applica tion_Parameters ()
Dim receiveBytes As [Byte]() =
receivingUdpCli ent.Receive(Rem oteIpEndPoint)

... more code

End Sub
<sw************ @yahoo.comwrote in message
news:11******** *************@h 48g2000cwc.goog legroups.com...

If I do this:
Dim receiver As New UdpClient()
Then the documentation says the system will pick a port. How can I
extract the chosen port number from receiver?
Bill

[Miro]

One more thing Bill,

Dont forget to close the Receiving UPD client before you close the
hread. - i dont think the example link shows it.
Otherwise what happens is the Application still remains running for a while
even after
you close the form.
So what I did is on the "close" of the form I added this code.

'Close the Socket - which should force the close of the open
thread listener
'Without this the thread could still remain open
receivingUdpCli ent.Close()
'Abort the thread - This doesnt always work alone - need to
close socket as well.
ThreadReceive.A bort()

If you want my mini snippet of code i created to send and recieve strings
between an exe, lemi know.
Ill just paste it all here.

Miro
"Miro" <mi******@golde n.netwrote in message
news:%2******** ********@TK2MSF TNGP03.phx.gbl. ..

Bill,

This is a great example:
http://www.codeproject.com/vb/net/UDP_Send_Receive.asp

I used it...but basically you do this:

'in my case i made it a public var
Public SocketNO As Integer = 1234 ' where 1234 is your socket no u want
Public RemoteIpEndPoin t As New _
System.Net.IPEn dPoint(System.N et.IPAddress.An y, SocketNO)

'then the sub i had as a receiver
Public Sub Receive_Applica tion_Parameters ()
Dim receiveBytes As [Byte]() =
receivingUdpCli ent.Receive(Rem oteIpEndPoint)

... more code

End Sub
<sw************ @yahoo.comwrote in message
news:11******** *************@h 48g2000cwc.goog legroups.com...

>If I do this:
Dim receiver As New UdpClient()
Then the documentation says the system will pick a port. How can I
extract the chosen port number from receiver?
Bill

[swartzbill2000]

Interesting, but it doesn't answer my question. If the UdpClient ctor
picks a free port number, how can I find out which port number?
Bill

Miro wrote:

One more thing Bill,

Dont forget to close the Receiving UPD client before you close the
hread. - i dont think the example link shows it.
Otherwise what happens is the Application still remains running for a while
even after
you close the form.
So what I did is on the "close" of the form I added this code.

'Close the Socket - which should force the close of the open
thread listener
'Without this the thread could still remain open
receivingUdpCli ent.Close()
'Abort the thread - This doesnt always work alone - need to
close socket as well.
ThreadReceive.A bort()

If you want my mini snippet of code i created to send and recieve strings
between an exe, lemi know.
Ill just paste it all here.

Miro
"Miro" <mi******@golde n.netwrote in message
news:%2******** ********@TK2MSF TNGP03.phx.gbl. ..

Bill,

This is a great example:
http://www.codeproject.com/vb/net/UDP_Send_Receive.asp

I used it...but basically you do this:

'in my case i made it a public var
Public SocketNO As Integer = 1234 ' where 1234 is your socket no u want
Public RemoteIpEndPoin t As New _
System.Net.IPEn dPoint(System.N et.IPAddress.An y, SocketNO)

'then the sub i had as a receiver
Public Sub Receive_Applica tion_Parameters ()
Dim receiveBytes As [Byte]() =
receivingUdpCli ent.Receive(Rem oteIpEndPoint)

... more code

End Sub
<sw************ @yahoo.comwrote in message
news:11******** *************@h 48g2000cwc.goog legroups.com...

If I do this:
Dim receiver As New UdpClient()
Then the documentation says the system will pick a port. How can I
extract the chosen port number from receiver?
Bill

[Miro]

Sorry, I misread the question.
I read it as you were trying to figure out how to assign the Port.

My bad,
But....

I was under the impression you "Have To" and always should specify a port.
Even if you create an array of ports to use and randomly go thru them.
Otherwise Firewalls will catch and wont let thru a "random port" that you
try to create.

Ive taken a look at all my examples I had when I tried the UPD socket, and
all of them had
a port specified.

Im a VB.net newbie and you have now stumped me.
Hopefully someone else reads this and helps us both out now.

Any reason though you do not want to specify a socket?

M.

<sw************ @yahoo.comwrote in message
news:11******** **************@ i42g2000cwa.goo glegroups.com.. .

Interesting, but it doesn't answer my question. If the UdpClient ctor
picks a free port number, how can I find out which port number?
Bill

Miro wrote:

>One more thing Bill,

Dont forget to close the Receiving UPD client before you close the
hread. - i dont think the example link shows it.
Otherwise what happens is the Application still remains running for a
while
even after
you close the form.
So what I did is on the "close" of the form I added this code.

'Close the Socket - which should force the close of the open
thread listener
'Without this the thread could still remain open
receivingUdpCli ent.Close()
'Abort the thread - This doesnt always work alone - need to
close socket as well.
ThreadReceive.A bort()

If you want my mini snippet of code i created to send and recieve strings
between an exe, lemi know.
Ill just paste it all here.

Miro
"Miro" <mi******@golde n.netwrote in message
news:%2******* *********@TK2MS FTNGP03.phx.gbl ...

Bill,

This is a great example:
http://www.codeproject.com/vb/net/UDP_Send_Receive.asp

I used it...but basically you do this:

'in my case i made it a public var
Public SocketNO As Integer = 1234 ' where 1234 is your socket no u
want
Public RemoteIpEndPoin t As New _
System.Net.IPEn dPoint(System.N et.IPAddress.An y, SocketNO)

'then the sub i had as a receiver
Public Sub Receive_Applica tion_Parameters ()
Dim receiveBytes As [Byte]() =
receivingUdpCli ent.Receive(Rem oteIpEndPoint)

... more code

End Sub
<sw************ @yahoo.comwrote in message
news:11******** *************@h 48g2000cwc.goog legroups.com...
If I do this:
Dim receiver As New UdpClient()
Then the documentation says the system will pick a port. How can I
extract the chosen port number from receiver?
Bill

[Stephany Young]

Who mentioned firewalls - itt could just as easily be for communication
between 2processs on the same machine.

Because this end is the will be sending the packet, you don't really care
which port it uses. You only have to know which port to send it to!

If you want to know which port the OS has assigned then you can get from

UdpClient.Clien t.LocalEndPoint

Therre is a caveat that this property returns an EndPoint object and you
have to cast it as IPEndPoint object before you can get the port, e.g.:

Console.WriteLi ne(CType(UdpCli ent.Client.Loca lEndPoint, IPEndPoint).Por t)

"Miro" <mi******@golde n.netwrote in message
news:Ou******** ******@TK2MSFTN GP03.phx.gbl...

Sorry, I misread the question.
I read it as you were trying to figure out how to assign the Port.

My bad,
But....

I was under the impression you "Have To" and always should specify a port.
Even if you create an array of ports to use and randomly go thru them.
Otherwise Firewalls will catch and wont let thru a "random port" that you
try to create.

Ive taken a look at all my examples I had when I tried the UPD socket, and
all of them had
a port specified.

Im a VB.net newbie and you have now stumped me.
Hopefully someone else reads this and helps us both out now.

Any reason though you do not want to specify a socket?

M.

<sw************ @yahoo.comwrote in message
news:11******** **************@ i42g2000cwa.goo glegroups.com.. .

>Interesting, but it doesn't answer my question. If the UdpClient ctor
picks a free port number, how can I find out which port number?
Bill

Miro wrote:

>>One more thing Bill,

Dont forget to close the Receiving UPD client before you close the
hread. - i dont think the example link shows it.
Otherwise what happens is the Application still remains running for a
while
even after
you close the form.
So what I did is on the "close" of the form I added this code.

'Close the Socket - which should force the close of the open
thread listener
'Without this the thread could still remain open
receivingUdpCli ent.Close()
'Abort the thread - This doesnt always work alone - need to
close socket as well.
ThreadReceive.A bort()

If you want my mini snippet of code i created to send and recieve
strings
between an exe, lemi know.
Ill just paste it all here.

Miro
"Miro" <mi******@golde n.netwrote in message
news:%2****** **********@TK2M SFTNGP03.phx.gb l...
Bill,

This is a great example:
http://www.codeproject.com/vb/net/UDP_Send_Receive.asp

I used it...but basically you do this:

'in my case i made it a public var
Public SocketNO As Integer = 1234 ' where 1234 is your socket no u
want
Public RemoteIpEndPoin t As New _
System.Net.IPE ndPoint(System. Net.IPAddress.A ny, SocketNO)

'then the sub i had as a receiver
Public Sub Receive_Applica tion_Parameters ()
Dim receiveBytes As [Byte]() =
receivingUdpCl ient.Receive(Re moteIpEndPoint)

... more code

End Sub
<sw*********** *@yahoo.comwrot e in message
news:11******* **************@ h48g2000cwc.goo glegroups.com.. .
If I do this:
Dim receiver As New UdpClient()
Then the documentation says the system will pick a port. How can I
extract the chosen port number from receiver?
Bill

[swartzbill2000]

Thank you. I am just writing the server.
Bill

Stephany Young wrote:

Who mentioned firewalls - itt could just as easily be for communication
between 2processs on the same machine.

Because this end is the will be sending the packet, you don't really care
which port it uses. You only have to know which port to send it to!

If you want to know which port the OS has assigned then you can get from

UdpClient.Clien t.LocalEndPoint

Therre is a caveat that this property returns an EndPoint object and you
have to cast it as IPEndPoint object before you can get the port, e.g.:

Console.WriteLi ne(CType(UdpCli ent.Client.Loca lEndPoint, IPEndPoint).Por t)

"Miro" <mi******@golde n.netwrote in message
news:Ou******** ******@TK2MSFTN GP03.phx.gbl...

Sorry, I misread the question.
I read it as you were trying to figure out how to assign the Port.

My bad,
But....

I was under the impression you "Have To" and always should specify a port.
Even if you create an array of ports to use and randomly go thru them.
Otherwise Firewalls will catch and wont let thru a "random port" that you
try to create.

Ive taken a look at all my examples I had when I tried the UPD socket, and
all of them had
a port specified.

Im a VB.net newbie and you have now stumped me.
Hopefully someone else reads this and helps us both out now.

Any reason though you do not want to specify a socket?

M.

<sw************ @yahoo.comwrote in message
news:11******** **************@ i42g2000cwa.goo glegroups.com.. .

Interesting, but it doesn't answer my question. If the UdpClient ctor
picks a free port number, how can I find out which port number?
Bill

Miro wrote:
One more thing Bill,

Dont forget to close the Receiving UPD client before you close the
hread. - i dont think the example link shows it.
Otherwise what happens is the Application still remains running for a
while
even after
you close the form.
So what I did is on the "close" of the form I added this code.

'Close the Socket - which should force the close of the open
thread listener
'Without this the thread could still remain open
receivingUdpCli ent.Close()
'Abort the thread - This doesnt always work alone - need to
close socket as well.
ThreadReceive.A bort()

If you want my mini snippet of code i created to send and recieve
strings
between an exe, lemi know.
Ill just paste it all here.

Miro
"Miro" <mi******@golde n.netwrote in message
news:%2******* *********@TK2MS FTNGP03.phx.gbl ...
Bill,

This is a great example:
http://www.codeproject.com/vb/net/UDP_Send_Receive.asp

I used it...but basically you do this:

'in my case i made it a public var
Public SocketNO As Integer = 1234 ' where 1234 is your socket no u
want
Public RemoteIpEndPoin t As New _
System.Net.IPEn dPoint(System.N et.IPAddress.An y, SocketNO)

'then the sub i had as a receiver
Public Sub Receive_Applica tion_Parameters ()
Dim receiveBytes As [Byte]() =
receivingUdpCli ent.Receive(Rem oteIpEndPoint)

... more code

End Sub
<sw************ @yahoo.comwrote in message
news:11******** *************@h 48g2000cwc.goog legroups.com...
If I do this:
Dim receiver As New UdpClient()
Then the documentation says the system will pick a port. How can I
extract the chosen port number from receiver?
Bill