BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  UDP socket          BorlandTalk.com Forum Index -> C++ Builder (Internet Socket) View previous topic :: View next topic   Author Message Kresten Tolstrup Guest Posted: Tue Mar 27, 2007 6:46 pm    Post subject: UDP socket Hello Does anyone have a simple example, that shows how to use TUdpSocket. I use C++ builder 6.0. When I try to send anything I receive errorcode 10038. I setup the local and remote port numbers, then I call connect(), I have also tried with open(), after that I setup remote host and call SendBuf, then the Event UdpSocketError is called. There is not any server or client settings, is that correct?. Best Regards Kresten Back to top Kresten Tolstrup Guest Posted: Thu Mar 29, 2007 5:06 pm    Post subject: Re: UDP socket "Kresten Tolstrup" <kt (AT) danphone (DOT) com> wrote: Quote: Hello Does anyone have a simple example, that shows how to use TUdpSocket. I use C++ builder 6.0. When I try to send anything I receive errorcode 10038. I setup the local and remote port numbers, then I call connect(), I have also tried with open(), after that I setup remote host and call SendBuf, then the Event UdpSocketError is called. There is not any server or client settings, is that correct?. Best Regards Kresten When I setup the following: if (bServer) { UdpSocket->RemoteHost = "<Any>"; UdpSocket->RemotePort = 0; UdpSocket->LocalHost = "<Any>"; UdpSocket->LocalPort = 34100; } else { UdpSocket->RemoteHost = "192.168.0.27"; UdpSocket->RemotePort = 34100; UdpSocket->LocalHost = "<Any>"; UdpSocket->LocalPort = 0; } UdpSocket->Open(); there are no errors when bServer is false, and the Event UdpSocketConnect is called. When bServer is true the event UdpSocketError is called with socket error 10049. If I then change RemoteHost to 127.0.0.1, then UdpSocketError is not called, but if it shall work as a server, the remote host cannot be specified. So how shall it be setup to a server ? The C Builder Developer's guide say, on page 37-7, that the LocalPort property shall be set, and nothing else. It also says that there is an OnAccept event, that is called when a client has connected, but UdpSocket don't have this event. For client sockets it says that the remote port and remote address shall be set and nothing else. Best Regards Kresten Back to top Paul at NCF Guest Posted: Fri Mar 30, 2007 2:48 am    Post subject: Re: UDP socket Hi, I've not used this component, but I have used the Indy UDP components. Indy has separate Client and Server components, whereas this borland component seems to be doing both functions, which seems strange and with no obvious settings for setting it up for either. I had a quick play with it but not found out much so far. Paul "Kresten Tolstrup" <kt (AT) danphone (DOT) com> wrote in message news:4609120b$1 (AT) newsgroups (DOT) borland.com... Quote: Hello Does anyone have a simple example, that shows how to use TUdpSocket. I use C++ builder 6.0. When I try to send anything I receive errorcode 10038. I setup the local and remote port numbers, then I call connect(), I have also tried with open(), after that I setup remote host and call SendBuf, then the Event UdpSocketError is called. There is not any server or client settings, is that correct?. Best Regards Kresten Back to top Remy Lebeau (TeamB) Guest Posted: Fri Mar 30, 2007 4:15 am    Post subject: Re: UDP socket "Kresten Tolstrup" <kt (AT) danphone (DOT) com> wrote in message news:4609120b$1 (AT) newsgroups (DOT) borland.com... Quote: Does anyone have a simple example, that shows how to use TUdpSocket. I use C++ builder 6.0. Borland's socket components for CLX are horribly written. I strongly advise you to not use them at all. There are plenty of third-party components that are much better. Quote: When I try to send anything I receive errorcode 10038. WSAENOTSOCK (10038) Socket operation on non-socket. An operation was attempted on something that is not a socket. Either the socket handle parameter did not reference a valid socket, or for select, a member of an fd_set was not valid. Quote: I setup the local and remote port numbers, then I call connect(), I have also tried with open(), after that I setup remote host and call SendBuf, then the Event UdpSocketError is called. You have to specify the Host before you call Open() or Connect(). You can't set it afterwards. Gambit Back to top Kresten Tolstrup Guest Posted: Tue Apr 10, 2007 3:23 pm    Post subject: Re: UDP socket Hi, I have now used the Indy components, and it is working, but isn't there any callback function in the client class, like the IdUDPServerUDPRead function in the server class, or do I have to poll the client class to see if it has received anything? Best Regards Kresten "Paul at NCF" <notplmacca (AT) clara (DOT) co.uk> wrote: Quote: Hi, I've not used this component, but I have used the Indy UDP components. Indy has separate Client and Server components, whereas this borland component seems to be doing both functions, which seems strange and with no obvious Paul "Kresten Tolstrup" <kt (AT) danphone (DOT) com> wrote in message news:4609120b$1 (AT) newsgroups (DOT) borland.com... Hello Does anyone have a simple example, that shows how to use TUdpSocket. I use Back to top Remy Lebeau (TeamB) Guest Posted: Tue Apr 10, 2007 10:02 pm    Post subject: Re: UDP socket "Kresten Tolstrup" <kt (AT) danphone (DOT) com> wrote in message news:461b577e$1 (AT) newsgroups (DOT) borland.com... Quote: I have now used the Indy components, and it is working, but isn't there any callback function in the client class, like the IdUDPServerUDPRead function in the server class No, there is not. But you can use TIdUDPServer for both a client and a server, as it has all of the same writing methods that TIdUDPClient has. The only difference between TIdUDPClient and TIdUDPServer is that the former exposes Host and Port properties, which you don't really need, and the latter allows listening on multiple local IP/Port pairs, which you only need 1 of on the client side. Otherwise, they are both the same, as they both derive from TIdUDPBase, which implements most of the work equally between them. Quote: do I have to poll the client class to see if it has received anything? Yes, you would. Gambit Back to top Kresten Tolstrup Guest Posted: Thu Apr 12, 2007 4:04 pm    Post subject: Re: UDP socket Hi OK, I use the server as client to, the event OnUDPRead is then called when a UDP packet is received, and I can get the data from the Tstream, but how can I get the size, if I use the function AData->GetSize(), then I get the error "not accessible". Kresten "Remy Lebeau \(TeamB\)" <no.spam (AT) no (DOT) spam.com> wrote: Quote: "Kresten Tolstrup" <kt (AT) danphone (DOT) com> wrote in message news:461b577e$1 (AT) newsgroups (DOT) borland.com... I have now used the Indy components, and it is working, but isn't there any callback function in the client class, like the IdUDPServerUDPRead function in the server class No, there is not. But you can use TIdUDPServer for both a client and a server, as it has all of the same writing methods that TIdUDPClient has. The only difference between TIdUDPClient and TIdUDPServer is that the former exposes Host and Port properties, which you don't really need, and the latter allows listening on multiple local IP/Port pairs, which you only need 1 of on the client side. Otherwise, they are both the same, as they both derive from TIdUDPBase, which implements most of the work equally between them. do I have to poll the client class to see if it has received anything? Yes, you would. Gambit Back to top Remy Lebeau (TeamB) Guest Posted: Thu Apr 12, 2007 10:13 pm    Post subject: Re: UDP socket "Kresten Tolstrup" <kt (AT) danphone (DOT) com> wrote in message news:461e0413$1 (AT) newsgroups (DOT) borland.com... Quote: how can I get the size, if I use the function AData->GetSize(), then I get the error "not accessible". Use the public Size property instead. GetSize() is the getter method for the property. 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