78 lines
2.7 KiB
C
78 lines
2.7 KiB
C
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/*
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* Udp.cpp: Library to send/receive UDP packets.
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*
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* NOTE: UDP is fast, but has some important limitations (thanks to Warren Gray for mentioning these)
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* 1) UDP does not guarantee the order in which assembled UDP packets are received. This
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* might not happen often in practice, but in larger network topologies, a UDP
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* packet can be received out of sequence.
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* 2) UDP does not guard against lost packets - so packets *can* disappear without the sender being
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* aware of it. Again, this may not be a concern in practice on small local networks.
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* For more information, see http://www.cafeaulait.org/course/week12/35.html
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*
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* MIT License:
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* Copyright (c) 2008 Bjoern Hartmann
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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* bjoern@cs.stanford.edu 12/30/2008
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*/
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#ifndef _WIFIUDP_H_
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#define _WIFIUDP_H_
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#include <Arduino.h>
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#include <Udp.h>
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#include <cbuf.h>
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class WiFiUDP : public UDP {
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private:
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int udp_server;
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IPAddress multicast_ip;
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IPAddress remote_ip;
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uint16_t server_port;
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uint16_t remote_port;
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char * tx_buffer;
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size_t tx_buffer_len;
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cbuf * rx_buffer;
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public:
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WiFiUDP();
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~WiFiUDP();
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uint8_t begin(IPAddress a, uint16_t p);
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uint8_t begin(uint16_t p);
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uint8_t beginMulticast(IPAddress a, uint16_t p);
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void stop();
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int beginMulticastPacket();
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int beginPacket();
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int beginPacket(IPAddress ip, uint16_t port);
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int beginPacket(const char *host, uint16_t port);
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int endPacket();
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size_t write(uint8_t);
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size_t write(const uint8_t *buffer, size_t size);
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int parsePacket();
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int available();
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int read();
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int read(unsigned char* buffer, size_t len);
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int read(char* buffer, size_t len);
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int peek();
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void flush();
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IPAddress remoteIP();
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uint16_t remotePort();
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};
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#endif /* _WIFIUDP_H_ */
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