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Fix for issue 439. UDP API changed to derive from Stream. The old sendPacket and readPacket calls have been removed, and replaced with Stream-derived alternatives which provide more commonality with other communications classes and to allow both buffered and full-packet-at-a-time uses. Also includes the introduction of an IPAddress class to make passing them around easier (and require fewer pointers to be exposed)

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This commit is contained in:
amcewen
2011-01-10 14:54:29 +00:00
parent 5009fc15fa
commit 88e858f6e3
11 changed files with 359 additions and 120 deletions
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31
libraries/Ethernet/examples/UDPSendReceiveString/UDPSendReceiveString.pde
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@ -22,15 +22,10 @@
// The IP address will be dependent on your local network:
byte mac[] = {
0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
byte ip[] = {
192,168,1,177 };
IPAddress ip(192, 168, 1, 177);
unsigned int localPort = 8888; // local port to listen on
// the next two variables are set when a packet is received
byte remoteIp[4]; // holds received packet's originating IP
unsigned int remotePort; // holds received packet's originating port
// buffers for receiving and sending data
char packetBuffer[UDP_TX_PACKET_MAX_SIZE]; //buffer to hold incoming packet,
char ReplyBuffer[] = "acknowledged"; // a string to send back
@ -48,19 +43,33 @@ void setup() {
void loop() {
// if there's data available, read a packet
int packetSize = Udp.available(); // note that this includes the UDP header
int packetSize = Udp.parsePacket();
if(packetSize)
{
packetSize = packetSize - 8; // subtract the 8 byte header
Serial.print("Received packet of size ");
Serial.println(packetSize);
Serial.print("From ");
IPAddress remote = Udp.remoteIP();
for (int i =0; i < 4; i++)
{
Serial.print(remote[i], DEC);
if (i < 3)
{
Serial.print(".");
}
}
Serial.print(", port ");
Serial.println(Udp.remotePort());
// read the packet into packetBufffer and get the senders IP addr and port number
Udp.readPacket(packetBuffer,UDP_TX_PACKET_MAX_SIZE, remoteIp, remotePort);
// read the packet into packetBufffer
Udp.read((byte*)packetBuffer,UDP_TX_PACKET_MAX_SIZE);
Serial.println("Contents:");
Serial.println(packetBuffer);
Udp.sendPacket( ReplyBuffer, remoteIp, remotePort);
// send a reply, to the IP address and port that sent us the packet we received
Udp.beginPacket(Udp.remoteIP(), Udp.remotePort());
Udp.write(ReplyBuffer);
Udp.endPacket();
}
delay(10);
}