Ilya I
Example program with HTTPServer and sensor data streaming over TCPSockets, using Donatien Garnier's Net APIs and services code on top of LWIP. Files StreamServer.h and .cpp encapsulate streaming over TCPSockets. Broadcast is done by sendToAll(), and all incoming data is echoed back to the client. Echo code can be replaced with some remote control of the streaming interface. See main() that shows how to periodically send some data to all subscribed clients. To subscribe, a client should open a socket at <mbed_ip> port 123. I used few lines in TCL code to set up a quick sink for the data. HTTP files are served on port 80 concurrently to the streaming.
Diff: api/TCPSocket.h
- Revision:
- 0:e614f7875b60
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/api/TCPSocket.h Sat Jun 12 06:01:50 2010 +0000
@@ -0,0 +1,105 @@
+
+/*
+Copyright (c) 2010 Donatien Garnier (donatiengar [at] gmail [dot] com)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+*/
+
+#ifndef TCPSOCKET_H
+#define TCPSOCKET_H
+
+#include "if/net/net.h"
+//Essentially it is a safe interface to NetTcpSocket
+
+enum TCPSocketErr
+{
+ __TCPSOCKET_MIN = -0xFFFF,
+ TCPSOCKET_SETUP, //NetTcpSocket not properly configured
+ TCPSOCKET_TIMEOUT,
+ TCPSOCKET_IF, //If has problems, does not exist or is not initialized
+ TCPSOCKET_MEM, //Not enough mem
+ TCPSOCKET_INUSE, //If/Port is in use
+ TCPSOCKET_EMPTY, //Connections queue is empty
+ TCPSOCKET_RST, // Connection was reset by remote host
+//...
+ TCPSOCKET_OK = 0
+};
+
+enum TCPSocketEvent
+{
+ TCPSOCKET_CONNECTED, //Connected to host, must call accept() if we were listening
+ TCPSOCKET_ACCEPT, //Connected to client
+ TCPSOCKET_READABLE, //Data in buf
+ TCPSOCKET_WRITEABLE, //Can write data to buf
+ TCPSOCKET_CONTIMEOUT,
+ TCPSOCKET_CONRST,
+ TCPSOCKET_CONABRT,
+ TCPSOCKET_ERROR,
+ TCPSOCKET_DISCONNECTED
+};
+
+
+class TCPSocket
+{
+public:
+ TCPSocket();
+protected:
+ TCPSocket(NetTcpSocket* pNetTcpSocket);
+public:
+ ~TCPSocket(); //close()
+
+ TCPSocketErr bind(const Host& me);
+ TCPSocketErr listen();
+ TCPSocketErr connect(const Host& host);
+ TCPSocketErr accept(Host* pClient, TCPSocket** ppNewTcpSocket);
+
+ int /*if < 0 : TCPSocketErr*/ send(const char* buf, int len);
+ int /*if < 0 : TCPSocketErr*/ recv(char* buf, int len);
+
+ /* TODO NTH : printf / scanf helpers that call send/recv */
+
+ TCPSocketErr close();
+
+ class CDummy;
+ //Callbacks
+ void setOnEvent( void (*pMethod)(TCPSocketEvent) );
+ template<class T>
+ void setOnEvent( T* pItem, void (T::*pMethod)(TCPSocketEvent) )
+ {
+ m_pCbItem = (CDummy*) pItem;
+ m_pCbMeth = (void (CDummy::*)(TCPSocketEvent)) pMethod;
+ }
+
+ void resetOnEvent(); //Disable callback
+
+protected:
+ void onNetTcpSocketEvent(NetTcpSocketEvent e);
+ TCPSocketErr checkInst();
+
+private:
+ NetTcpSocket* m_pNetTcpSocket;
+
+ CDummy* m_pCbItem;
+ void (CDummy::*m_pCbMeth)(TCPSocketEvent);
+
+ void (*m_pCb)(TCPSocketEvent);
+
+};
+
+#endif