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/lwip/lwipNetUdpSocket.h@0:e614f7875b60, 2010-06-12 (annotated)
- Committer:
- iva2k
- Date:
- Sat Jun 12 06:01:50 2010 +0000
- Revision:
- 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 LWIPNETUDPSOCKET_H |
| iva2k | 0:e614f7875b60 | 25 | #define LWIPNETUDPSOCKET_H |
| iva2k | 0:e614f7875b60 | 26 | |
| iva2k | 0:e614f7875b60 | 27 | #define NET_LWIP_STACK 1 |
| iva2k | 0:e614f7875b60 | 28 | #include "lwip/ip_addr.h" |
| iva2k | 0:e614f7875b60 | 29 | #include "if/net/net.h" |
| iva2k | 0:e614f7875b60 | 30 | #include "LwipNetIf.h" |
| iva2k | 0:e614f7875b60 | 31 | |
| iva2k | 0:e614f7875b60 | 32 | #include <list> |
| iva2k | 0:e614f7875b60 | 33 | using std::list; |
| iva2k | 0:e614f7875b60 | 34 | |
| iva2k | 0:e614f7875b60 | 35 | //Implements NetUdpSockets over lwIP raw API |
| iva2k | 0:e614f7875b60 | 36 | |
| iva2k | 0:e614f7875b60 | 37 | struct udp_pcb; //Represents a Udp Connection, "Protocol Control Block", see rawapi.txt & udp.h |
| iva2k | 0:e614f7875b60 | 38 | struct pbuf; //Lwip Buffer Container |
| iva2k | 0:e614f7875b60 | 39 | |
| iva2k | 0:e614f7875b60 | 40 | typedef signed char err_t; |
| iva2k | 0:e614f7875b60 | 41 | |
| iva2k | 0:e614f7875b60 | 42 | class LwipNetUdpSocket: public NetUdpSocket |
| iva2k | 0:e614f7875b60 | 43 | { |
| iva2k | 0:e614f7875b60 | 44 | public: |
| iva2k | 0:e614f7875b60 | 45 | LwipNetUdpSocket(udp_pcb* pPcb = NULL); //Passes a pcb if already created (by an accept req for instance), in that case transfers ownership |
| iva2k | 0:e614f7875b60 | 46 | virtual ~LwipNetUdpSocket(); |
| iva2k | 0:e614f7875b60 | 47 | |
| iva2k | 0:e614f7875b60 | 48 | virtual NetUdpSocketErr bind(const Host& me); |
| iva2k | 0:e614f7875b60 | 49 | |
| iva2k | 0:e614f7875b60 | 50 | virtual int /*if < 0 : NetUdpSocketErr*/ sendto(const char* buf, int len, Host* pHost); |
| iva2k | 0:e614f7875b60 | 51 | virtual int /*if < 0 : NetUdpSocketErr*/ recvfrom(char* buf, int len, Host* pHost); |
| iva2k | 0:e614f7875b60 | 52 | |
| iva2k | 0:e614f7875b60 | 53 | virtual NetUdpSocketErr close(); |
| iva2k | 0:e614f7875b60 | 54 | |
| iva2k | 0:e614f7875b60 | 55 | virtual NetUdpSocketErr poll(); |
| iva2k | 0:e614f7875b60 | 56 | |
| iva2k | 0:e614f7875b60 | 57 | protected: |
| iva2k | 0:e614f7875b60 | 58 | volatile udp_pcb* m_pPcb; |
| iva2k | 0:e614f7875b60 | 59 | |
| iva2k | 0:e614f7875b60 | 60 | //Event callback from lwIp |
| iva2k | 0:e614f7875b60 | 61 | void recvCb(udp_pcb* pcb, struct pbuf* p, ip_addr_t* addr, u16_t port); |
| iva2k | 0:e614f7875b60 | 62 | |
| iva2k | 0:e614f7875b60 | 63 | private: |
| iva2k | 0:e614f7875b60 | 64 | void cleanUp(); //Flush input buffer |
| iva2k | 0:e614f7875b60 | 65 | struct InPacket |
| iva2k | 0:e614f7875b60 | 66 | { |
| iva2k | 0:e614f7875b60 | 67 | volatile pbuf* pBuf; |
| iva2k | 0:e614f7875b60 | 68 | ip_addr_t addr; |
| iva2k | 0:e614f7875b60 | 69 | u16_t port; |
| iva2k | 0:e614f7875b60 | 70 | }; |
| iva2k | 0:e614f7875b60 | 71 | |
| iva2k | 0:e614f7875b60 | 72 | list<InPacket> m_lInPkt; |
| iva2k | 0:e614f7875b60 | 73 | |
| iva2k | 0:e614f7875b60 | 74 | //Static callback : Transforms into a C++ callback |
| iva2k | 0:e614f7875b60 | 75 | static void sRecvCb(void *arg, struct udp_pcb *pcb, struct pbuf *p, ip_addr_t *addr, u16_t port); |
| iva2k | 0:e614f7875b60 | 76 | |
| iva2k | 0:e614f7875b60 | 77 | }; |
| iva2k | 0:e614f7875b60 | 78 | |
| iva2k | 0:e614f7875b60 | 79 | #endif |