I've written an async socket server app and I'm having an issue with the
EndReceive() call.
My begin receive call is:
sockState.Remot eSocket.BeginRe ceive(sockState .ReceiveBuffer, 0,
SocketState.Buf ferSize, 0, new AsyncCallback(t his.ReadCallbac k), sockState);
The ReadCallback() method begins:
private void ReadCallback(IA syncResult asyncResult)
{
Debug.WriteLine ("SocketServer. ReadCallback: Entry");
SocketState socketState = (SocketState) asyncResult.Asy ncState;
int bytesRead = socketState.Rem oteSocket.EndRe ceive(asyncResu lt);
Debug.WriteLine (String.Format( "SocketServer.R eadCallback: End receive with
{0} bytes", bytesRead));
The first Debug.WriteLine () gets called when I connect, but EndReceive seems
to block after the send.
My test application is very simple. All it does is:
Socket sock = new Socket(AddressF amily.InterNetw ork, SocketType.Stre am,
ProtocolType.Tc p);
IPEndPoint ep = new IPEndPoint(IPAd dress.Loopback, 7451);
sock.Connect(ep );
HelloMsg hm = (HelloMsg)
SocketMessageFa ctory.CreateSoc ketMessage(Sock etMsgType.HELLO );
sock.Send(hm.To Buffer());
So, as I said, the server registers the connection and gets to the
ReadCallback method, but blocks on EndReceive. Any ideas on what I'm
missing?
Thanks.
Pete
-- http://www.petedavis.net 4  1849 
"Pete Davis" <pd******@hotma il.com> wrote in message
news:1c******** *************** *******@news.me ganetnews.com.. . I've written an async socket server app and I'm having an issue with the
EndReceive() call.
My begin receive call is:
sockState.Remot eSocket.BeginRe ceive(sockState .ReceiveBuffer, 0,
SocketState.Buf ferSize, 0, new AsyncCallback(t his.ReadCallbac k),
sockState);
The ReadCallback() method begins:
private void ReadCallback(IA syncResult asyncResult)
{
Debug.WriteLine ("SocketServer. ReadCallback: Entry");
SocketState socketState = (SocketState) asyncResult.Asy ncState;
int bytesRead = socketState.Rem oteSocket.EndRe ceive(asyncResu lt);
Debug.WriteLine (String.Format( "SocketServer.R eadCallback: End receive
with {0} bytes", bytesRead));
The first Debug.WriteLine () gets called when I connect, but EndReceive
seems to block after the send.
My test application is very simple. All it does is:
Socket sock = new Socket(AddressF amily.InterNetw ork, SocketType.Stre am,
ProtocolType.Tc p);
IPEndPoint ep = new IPEndPoint(IPAd dress.Loopback, 7451);
sock.Connect(ep );
HelloMsg hm = (HelloMsg)
SocketMessageFa ctory.CreateSoc ketMessage(Sock etMsgType.HELLO );
sock.Send(hm.To Buffer());
So, as I said, the server registers the connection and gets to the
ReadCallback method, but blocks on EndReceive. Any ideas on what I'm
missing?
Thanks.
Pete
--
http://www.petedavis.net
Are you using ManualResetEven ts ?
I have a manual reset event for the Accept (which is also async). Do I need
it for the receive as well?
Pete
-- http://www.petedavis.net
"James" <James@Kimberle yREMOVE_MEdawn. co.uk> wrote in message
news:OV******** ******@TK2MSFTN GP10.phx.gbl...
"Pete Davis" <pd******@hotma il.com> wrote in message
news:1c******** *************** *******@news.me ganetnews.com.. . I've written an async socket server app and I'm having an issue with the
EndReceive() call.
My begin receive call is:
sockState.Remot eSocket.BeginRe ceive(sockState .ReceiveBuffer, 0,
SocketState.Buf ferSize, 0, new AsyncCallback(t his.ReadCallbac k),
sockState);
The ReadCallback() method begins:
private void ReadCallback(IA syncResult asyncResult)
{
Debug.WriteLine ("SocketServer. ReadCallback: Entry");
SocketState socketState = (SocketState) asyncResult.Asy ncState;
int bytesRead = socketState.Rem oteSocket.EndRe ceive(asyncResu lt);
Debug.WriteLine (String.Format( "SocketServer.R eadCallback: End receive
with {0} bytes", bytesRead));
The first Debug.WriteLine () gets called when I connect, but EndReceive
seems to block after the send.
My test application is very simple. All it does is:
Socket sock = new Socket(AddressF amily.InterNetw ork, SocketType.Stre am,
ProtocolType.Tc p);
IPEndPoint ep = new IPEndPoint(IPAd dress.Loopback, 7451);
sock.Connect(ep );
HelloMsg hm = (HelloMsg)
SocketMessageFa ctory.CreateSoc ketMessage(Sock etMsgType.HELLO );
sock.Send(hm.To Buffer());
So, as I said, the server registers the connection and gets to the
ReadCallback method, but blocks on EndReceive. Any ideas on what I'm
missing?
Thanks.
Pete
--
http://www.petedavis.net
Are you using ManualResetEven ts ?
Ok, so that was the problem. I added a manual reset event for the receive
operation and it now works. Thanks a ton.
Now I have a new problem. One I suspected I might have and I'm confused on
this. According to the documentation:
ms-help://MS.VSCC.2003/MS.MSDNQTR.2003 OCT.1033/cpref/html/frlrfSystemNetS ock
etsSocketClassE ndReceiveTopic. htm
on EndReceive(), at least from looking at the sample code (which granted,
doesn't necessarily mean anything), it appears that by continuing to call
BeginReceive() and EndReceive(), I should eventually get an EndRevceive()
that returns 0 bytes at the end of my data.
That's not happening. In this sample case, I'm sending only a 16 byte
message. EndReceive() gets called once for the 16 byte message and then it
blocks the second time.
I need to know when a message has been completely sent. I could interpret
the data as it comes in and start keeping a tally of how much data has come
across (the first 2 ints in the message are a message type and a message
length). So based on the length, I should know how many bytes are waiting to
be received.
I'd rather not have to do this partial decoding of the data, but if I
have to, obviously I will.
Pete
-- http://www.petedavis.net
"James" <James@Kimberle yREMOVE_MEdawn. co.uk> wrote in message
news:OV******** ******@TK2MSFTN GP10.phx.gbl...
"Pete Davis" <pd******@hotma il.com> wrote in message
news:1c******** *************** *******@news.me ganetnews.com.. . I've written an async socket server app and I'm having an issue with the
EndReceive() call.
My begin receive call is:
sockState.Remot eSocket.BeginRe ceive(sockState .ReceiveBuffer, 0,
SocketState.Buf ferSize, 0, new AsyncCallback(t his.ReadCallbac k),
sockState);
The ReadCallback() method begins:
private void ReadCallback(IA syncResult asyncResult)
{
Debug.WriteLine ("SocketServer. ReadCallback: Entry");
SocketState socketState = (SocketState) asyncResult.Asy ncState;
int bytesRead = socketState.Rem oteSocket.EndRe ceive(asyncResu lt);
Debug.WriteLine (String.Format( "SocketServer.R eadCallback: End receive
with {0} bytes", bytesRead));
The first Debug.WriteLine () gets called when I connect, but EndReceive
seems to block after the send.
My test application is very simple. All it does is:
Socket sock = new Socket(AddressF amily.InterNetw ork, SocketType.Stre am,
ProtocolType.Tc p);
IPEndPoint ep = new IPEndPoint(IPAd dress.Loopback, 7451);
sock.Connect(ep );
HelloMsg hm = (HelloMsg)
SocketMessageFa ctory.CreateSoc ketMessage(Sock etMsgType.HELLO );
sock.Send(hm.To Buffer());
So, as I said, the server registers the connection and gets to the
ReadCallback method, but blocks on EndReceive. Any ideas on what I'm
missing?
Thanks.
Pete
--
http://www.petedavis.net
Are you using ManualResetEven ts ?
"Pete Davis" <pd******@hotma il.com> wrote in message
news:11******** *************** *******@news.me ganetnews.com.. . Ok, so that was the problem. I added a manual reset event for the receive
operation and it now works. Thanks a ton.
Now I have a new problem. One I suspected I might have and I'm confused on
this. According to the documentation:
ms-help://MS.VSCC.2003/MS.MSDNQTR.2003 OCT.1033/cpref/html/frlrfSystemNetS ock etsSocketClassE ndReceiveTopic. htm
on EndReceive(), at least from looking at the sample code (which granted,
doesn't necessarily mean anything), it appears that by continuing to call
BeginReceive() and EndReceive(), I should eventually get an EndRevceive()
that returns 0 bytes at the end of my data.
That's not happening. In this sample case, I'm sending only a 16 byte
message. EndReceive() gets called once for the 16 byte message and then it
blocks the second time.
I need to know when a message has been completely sent. I could
interpret the data as it comes in and start keeping a tally of how much data has
come across (the first 2 ints in the message are a message type and a message
length). So based on the length, I should know how many bytes are waiting
to be received.
I'd rather not have to do this partial decoding of the data, but if I
have to, obviously I will.
Pete
--
http://www.petedavis.net
"James" <James@Kimberle yREMOVE_MEdawn. co.uk> wrote in message
news:OV******** ******@TK2MSFTN GP10.phx.gbl...
"Pete Davis" <pd******@hotma il.com> wrote in message
news:1c******** *************** *******@news.me ganetnews.com.. . I've written an async socket server app and I'm having an issue with
the EndReceive() call.
My begin receive call is:
sockState.Remot eSocket.BeginRe ceive(sockState .ReceiveBuffer, 0,
SocketState.Buf ferSize, 0, new AsyncCallback(t his.ReadCallbac k),
sockState);
The ReadCallback() method begins:
private void ReadCallback(IA syncResult asyncResult)
{
Debug.WriteLine ("SocketServer. ReadCallback: Entry");
SocketState socketState = (SocketState) asyncResult.Asy ncState;
int bytesRead = socketState.Rem oteSocket.EndRe ceive(asyncResu lt);
Debug.WriteLine (String.Format( "SocketServer.R eadCallback: End receive
with {0} bytes", bytesRead));
The first Debug.WriteLine () gets called when I connect, but EndReceive
seems to block after the send.
My test application is very simple. All it does is:
Socket sock = new Socket(AddressF amily.InterNetw ork,
SocketType.Stre am, ProtocolType.Tc p);
IPEndPoint ep = new IPEndPoint(IPAd dress.Loopback, 7451);
sock.Connect(ep );
HelloMsg hm = (HelloMsg)
SocketMessageFa ctory.CreateSoc ketMessage(Sock etMsgType.HELLO );
sock.Send(hm.To Buffer());
So, as I said, the server registers the connection and gets to the
ReadCallback method, but blocks on EndReceive. Any ideas on what I'm
missing?
Thanks.
Pete
--
http://www.petedavis.net
Are you using ManualResetEven ts ?
Are you Setting the Receive Manual Reset Event after each Recieve? - You
shouldn't - only Set the MSR when bytes == 0
does this help?
JJ This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics | |
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