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Diffstat (limited to 'protocol/usb_hid/arduino-1.0.1/cores/arduino/Udp.h')
| -rw-r--r-- | protocol/usb_hid/arduino-1.0.1/cores/arduino/Udp.h | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/protocol/usb_hid/arduino-1.0.1/cores/arduino/Udp.h b/protocol/usb_hid/arduino-1.0.1/cores/arduino/Udp.h new file mode 100644 index 000000000..dc5644b9d --- /dev/null +++ b/protocol/usb_hid/arduino-1.0.1/cores/arduino/Udp.h @@ -0,0 +1,88 @@ +/* + * Udp.cpp: Library to send/receive UDP packets. + * + * NOTE: UDP is fast, but has some important limitations (thanks to Warren Gray for mentioning these) + * 1) UDP does not guarantee the order in which assembled UDP packets are received. This + * might not happen often in practice, but in larger network topologies, a UDP + * packet can be received out of sequence. + * 2) UDP does not guard against lost packets - so packets *can* disappear without the sender being + * aware of it. Again, this may not be a concern in practice on small local networks. + * For more information, see http://www.cafeaulait.org/course/week12/35.html + * + * MIT License: + * Copyright (c) 2008 Bjoern Hartmann + * 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. + * + * bjoern@cs.stanford.edu 12/30/2008 + */ + +#ifndef udp_h +#define udp_h + +#include <Stream.h> +#include <IPAddress.h> + +class UDP : public Stream { + +public: + virtual uint8_t begin(uint16_t) =0; // initialize, start listening on specified port. Returns 1 if successful, 0 if there are no sockets available to use + virtual void stop() =0; // Finish with the UDP socket + + // Sending UDP packets + + // Start building up a packet to send to the remote host specific in ip and port + // Returns 1 if successful, 0 if there was a problem with the supplied IP address or port + virtual int beginPacket(IPAddress ip, uint16_t port) =0; + // Start building up a packet to send to the remote host specific in host and port + // Returns 1 if successful, 0 if there was a problem resolving the hostname or port + virtual int beginPacket(const char *host, uint16_t port) =0; + // Finish off this packet and send it + // Returns 1 if the packet was sent successfully, 0 if there was an error + virtual int endPacket() =0; + // Write a single byte into the packet + virtual size_t write(uint8_t) =0; + // Write size bytes from buffer into the packet + virtual size_t write(const uint8_t *buffer, size_t size) =0; + + // Start processing the next available incoming packet + // Returns the size of the packet in bytes, or 0 if no packets are available + virtual int parsePacket() =0; + // Number of bytes remaining in the current packet + virtual int available() =0; + // Read a single byte from the current packet + virtual int read() =0; + // Read up to len bytes from the current packet and place them into buffer + // Returns the number of bytes read, or 0 if none are available + virtual int read(unsigned char* buffer, size_t len) =0; + // Read up to len characters from the current packet and place them into buffer + // Returns the number of characters read, or 0 if none are available + virtual int read(char* buffer, size_t len) =0; + // Return the next byte from the current packet without moving on to the next byte + virtual int peek() =0; + virtual void flush() =0; // Finish reading the current packet + + // Return the IP address of the host who sent the current incoming packet + virtual IPAddress remoteIP() =0; + // Return the port of the host who sent the current incoming packet + virtual uint16_t remotePort() =0; +protected: + uint8_t* rawIPAddress(IPAddress& addr) { return addr.raw_address(); }; +}; + +#endif |