89 lines
2.2 KiB
C++
89 lines
2.2 KiB
C++
/*
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* UIPEthernet UdpServer example.
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*
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* UIPEthernet is a TCP/IP stack that can be used with a enc28j60 based
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* Ethernet-shield.
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*
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* UIPEthernet uses the fine uIP stack by Adam Dunkels <adam@sics.se>
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*
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* -----------------
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*
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* This UdpServer example sets up a udp-server at 192.168.0.6 on port 5000.
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* send packet via upd to test
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*
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* Copyright (C) 2013 by Norbert Truchsess (norbert.truchsess@t-online.de)
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*/
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#include <UIPEthernet.h>
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EthernetUDP udp;
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void setup() {
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Serial.begin(9600);
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uint8_t mac[6] = {0x00,0x01,0x02,0x03,0x04,0x05};
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Ethernet.begin(mac,IPAddress(192,168,0,6));
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int success = udp.begin(5000);
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Serial.print("initialize: ");
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Serial.println(success ? "success" : "failed");
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}
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void loop() {
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//check for new udp-packet:
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int size = udp.parsePacket();
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if (size > 0) {
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do
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{
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char* msg = (char*)malloc(size+1);
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int len = udp.read(msg,size+1);
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msg[len]=0;
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Serial.print("received: '");
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Serial.print(msg);
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free(msg);
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}
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while ((size = udp.available())>0);
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//finish reading this packet:
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udp.flush();
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Serial.println("'");
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int success;
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do
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{
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Serial.print("remote ip: ");
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Serial.println(udp.remoteIP());
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Serial.print("remote port: ");
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Serial.println(udp.remotePort());
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//send new packet back to ip/port of client. This also
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//configures the current connection to ignore packets from
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//other clients!
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success = udp.beginPacket(udp.remoteIP(),udp.remotePort());
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Serial.print("beginPacket: ");
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Serial.println(success ? "success" : "failed");
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//beginPacket fails if remote ethaddr is unknown. In this case an
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//arp-request is send out first and beginPacket succeeds as soon
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//the arp-response is received.
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}
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while (!success);
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success = udp.println("hello world from arduino");
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Serial.print("bytes written: ");
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Serial.println(success);
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success = udp.endPacket();
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Serial.print("endPacket: ");
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Serial.println(success ? "success" : "failed");
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udp.stop();
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//restart with new connection to receive packets from other clients
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Serial.print("restart connection: ");
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Serial.println (udp.begin(5000) ? "success" : "failed");
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}
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}
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