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.
if/net/nettcpsocket.h@1:3ee499525aa5, 2010-06-14 (annotated)
- Committer:
- iva2k
- Date:
- Mon Jun 14 03:24:33 2010 +0000
- Revision:
- 1:3ee499525aa5
- Parent:
- 0:e614f7875b60
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| iva2k | 0:e614f7875b60 | 1 | |
| iva2k | 0:e614f7875b60 | 2 | /* |
| iva2k | 0:e614f7875b60 | 3 | Copyright (c) 2010 Donatien Garnier (donatiengar [at] gmail [dot] com) |
| iva2k | 0:e614f7875b60 | 4 | |
| iva2k | 0:e614f7875b60 | 5 | Permission is hereby granted, free of charge, to any person obtaining a copy |
| iva2k | 0:e614f7875b60 | 6 | of this software and associated documentation files (the "Software"), to deal |
| iva2k | 0:e614f7875b60 | 7 | in the Software without restriction, including without limitation the rights |
| iva2k | 0:e614f7875b60 | 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| iva2k | 0:e614f7875b60 | 9 | copies of the Software, and to permit persons to whom the Software is |
| iva2k | 0:e614f7875b60 | 10 | furnished to do so, subject to the following conditions: |
| iva2k | 0:e614f7875b60 | 11 | |
| iva2k | 0:e614f7875b60 | 12 | The above copyright notice and this permission notice shall be included in |
| iva2k | 0:e614f7875b60 | 13 | all copies or substantial portions of the Software. |
| iva2k | 0:e614f7875b60 | 14 | |
| iva2k | 0:e614f7875b60 | 15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| iva2k | 0:e614f7875b60 | 16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| iva2k | 0:e614f7875b60 | 17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| iva2k | 0:e614f7875b60 | 18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| iva2k | 0:e614f7875b60 | 19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| iva2k | 0:e614f7875b60 | 20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| iva2k | 0:e614f7875b60 | 21 | THE SOFTWARE. |
| iva2k | 0:e614f7875b60 | 22 | */ |
| iva2k | 0:e614f7875b60 | 23 | |
| iva2k | 0:e614f7875b60 | 24 | #ifndef NETTCPSOCKET_H |
| iva2k | 0:e614f7875b60 | 25 | #define NETTCPSOCKET_H |
| iva2k | 0:e614f7875b60 | 26 | |
| iva2k | 0:e614f7875b60 | 27 | #include "net.h" |
| iva2k | 0:e614f7875b60 | 28 | #include "host.h" |
| iva2k | 0:e614f7875b60 | 29 | |
| iva2k | 0:e614f7875b60 | 30 | #include <queue> |
| iva2k | 0:e614f7875b60 | 31 | using std::queue; |
| iva2k | 0:e614f7875b60 | 32 | |
| iva2k | 0:e614f7875b60 | 33 | //Implements a Berkeley-like socket if |
| iva2k | 0:e614f7875b60 | 34 | //Can be interfaced either to lwip or a Telit module |
| iva2k | 0:e614f7875b60 | 35 | |
| iva2k | 0:e614f7875b60 | 36 | enum NetTcpSocketErr |
| iva2k | 0:e614f7875b60 | 37 | { |
| iva2k | 0:e614f7875b60 | 38 | __NETTCPSOCKET_MIN = -0xFFFF, |
| iva2k | 0:e614f7875b60 | 39 | NETTCPSOCKET_SETUP, //NetTcpSocket not properly configured |
| iva2k | 0:e614f7875b60 | 40 | NETTCPSOCKET_TIMEOUT, |
| iva2k | 0:e614f7875b60 | 41 | NETTCPSOCKET_IF, //If has problems |
| iva2k | 0:e614f7875b60 | 42 | NETTCPSOCKET_MEM, //Not enough mem |
| iva2k | 0:e614f7875b60 | 43 | NETTCPSOCKET_INUSE, //If/Port is in use |
| iva2k | 0:e614f7875b60 | 44 | NETTCPSOCKET_EMPTY, //Connections queue is empty |
| iva2k | 0:e614f7875b60 | 45 | NETTCPSOCKET_RST, // Connection was reset by remote host |
| iva2k | 0:e614f7875b60 | 46 | //... |
| iva2k | 0:e614f7875b60 | 47 | NETTCPSOCKET_OK = 0 |
| iva2k | 0:e614f7875b60 | 48 | }; |
| iva2k | 0:e614f7875b60 | 49 | |
| iva2k | 0:e614f7875b60 | 50 | enum NetTcpSocketEvent |
| iva2k | 0:e614f7875b60 | 51 | { |
| iva2k | 0:e614f7875b60 | 52 | NETTCPSOCKET_CONNECTED, //Connected to host, must call accept() if we were listening |
| iva2k | 0:e614f7875b60 | 53 | NETTCPSOCKET_ACCEPT, //Connected to client |
| iva2k | 0:e614f7875b60 | 54 | NETTCPSOCKET_READABLE, //Data in buf |
| iva2k | 0:e614f7875b60 | 55 | NETTCPSOCKET_WRITEABLE, //Can write data to buf |
| iva2k | 0:e614f7875b60 | 56 | NETTCPSOCKET_CONTIMEOUT, |
| iva2k | 0:e614f7875b60 | 57 | NETTCPSOCKET_CONRST, |
| iva2k | 0:e614f7875b60 | 58 | NETTCPSOCKET_CONABRT, |
| iva2k | 0:e614f7875b60 | 59 | NETTCPSOCKET_ERROR, |
| iva2k | 0:e614f7875b60 | 60 | NETTCPSOCKET_DISCONNECTED |
| iva2k | 0:e614f7875b60 | 61 | }; |
| iva2k | 0:e614f7875b60 | 62 | |
| iva2k | 0:e614f7875b60 | 63 | |
| iva2k | 0:e614f7875b60 | 64 | class NetTcpSocket |
| iva2k | 0:e614f7875b60 | 65 | { |
| iva2k | 0:e614f7875b60 | 66 | public: |
| iva2k | 0:e614f7875b60 | 67 | NetTcpSocket(); |
| iva2k | 0:e614f7875b60 | 68 | virtual ~NetTcpSocket(); //close() |
| iva2k | 0:e614f7875b60 | 69 | |
| iva2k | 0:e614f7875b60 | 70 | virtual NetTcpSocketErr bind(const Host& me) = 0; |
| iva2k | 0:e614f7875b60 | 71 | virtual NetTcpSocketErr listen() = 0; |
| iva2k | 0:e614f7875b60 | 72 | virtual NetTcpSocketErr connect(const Host& host) = 0; |
| iva2k | 0:e614f7875b60 | 73 | virtual NetTcpSocketErr accept(Host* pClient, NetTcpSocket** ppNewNetTcpSocket) = 0; |
| iva2k | 0:e614f7875b60 | 74 | |
| iva2k | 0:e614f7875b60 | 75 | virtual int /*if < 0 : NetTcpSocketErr*/ send(const char* buf, int len) = 0; |
| iva2k | 0:e614f7875b60 | 76 | virtual int /*if < 0 : NetTcpSocketErr*/ recv(char* buf, int len) = 0; |
| iva2k | 0:e614f7875b60 | 77 | |
| iva2k | 0:e614f7875b60 | 78 | virtual NetTcpSocketErr close() = 0; |
| iva2k | 0:e614f7875b60 | 79 | |
| iva2k | 0:e614f7875b60 | 80 | virtual NetTcpSocketErr poll() = 0; |
| iva2k | 0:e614f7875b60 | 81 | |
| iva2k | 0:e614f7875b60 | 82 | class CDummy; |
| iva2k | 0:e614f7875b60 | 83 | //Callbacks |
| iva2k | 0:e614f7875b60 | 84 | template<class T> |
| iva2k | 0:e614f7875b60 | 85 | //Linker bug : Must be defined here :( |
| iva2k | 0:e614f7875b60 | 86 | void setOnEvent( T* pItem, void (T::*pMethod)(NetTcpSocketEvent) ) |
| iva2k | 0:e614f7875b60 | 87 | { |
| iva2k | 0:e614f7875b60 | 88 | m_pCbItem = (CDummy*) pItem; |
| iva2k | 0:e614f7875b60 | 89 | m_pCbMeth = (void (CDummy::*)(NetTcpSocketEvent)) pMethod; |
| iva2k | 0:e614f7875b60 | 90 | } |
| iva2k | 0:e614f7875b60 | 91 | |
| iva2k | 0:e614f7875b60 | 92 | void resetOnEvent(); //Disable callback |
| iva2k | 0:e614f7875b60 | 93 | |
| iva2k | 0:e614f7875b60 | 94 | protected: |
| iva2k | 0:e614f7875b60 | 95 | void queueEvent(NetTcpSocketEvent e); |
| iva2k | 0:e614f7875b60 | 96 | void discardEvents(); |
| iva2k | 0:e614f7875b60 | 97 | void flushEvents(); //to be called during polling |
| iva2k | 0:e614f7875b60 | 98 | |
| iva2k | 0:e614f7875b60 | 99 | Host m_host; |
| iva2k | 0:e614f7875b60 | 100 | Host m_client; |
| iva2k | 0:e614f7875b60 | 101 | |
| iva2k | 0:e614f7875b60 | 102 | friend class Net; |
| iva2k | 0:e614f7875b60 | 103 | int m_refs; |
| iva2k | 0:e614f7875b60 | 104 | |
| iva2k | 0:e614f7875b60 | 105 | bool m_closed; |
| iva2k | 0:e614f7875b60 | 106 | bool m_removed; |
| iva2k | 0:e614f7875b60 | 107 | |
| iva2k | 0:e614f7875b60 | 108 | private: |
| iva2k | 0:e614f7875b60 | 109 | //We do not want to execute user code in interrupt routines, so we queue events until the server is polled |
| iva2k | 0:e614f7875b60 | 110 | //If we port this to a multithreaded OS, we could avoid this (however some functions here are not thread-safe, so beware ;) ) |
| iva2k | 0:e614f7875b60 | 111 | void onEvent(NetTcpSocketEvent e); //To be called on poll |
| iva2k | 0:e614f7875b60 | 112 | CDummy* m_pCbItem; |
| iva2k | 0:e614f7875b60 | 113 | void (CDummy::*m_pCbMeth)(NetTcpSocketEvent); |
| iva2k | 0:e614f7875b60 | 114 | queue<NetTcpSocketEvent> m_events; |
| iva2k | 0:e614f7875b60 | 115 | |
| iva2k | 0:e614f7875b60 | 116 | }; |
| iva2k | 0:e614f7875b60 | 117 | |
| iva2k | 0:e614f7875b60 | 118 | #endif |