multicast.cpp

00001 #include "EthernetNetIf.h"
00002 #include "SimpleSocket.h"
00003 
00004 void multicast() {
00005     EthernetNetIf eth;
00006     eth.setup();
00007     
00008     Host multicast(IpAddr(239, 192, 1, 100), 50000);
00009     DatagramSocket datagram(multicast);
00010     
00011     while (true) {
00012         Host host;
00013         if (datagram.receive(&host, 1 + (rand() % 5) / 3.0) > 0) {
00014             int value;
00015             datagram.scanf("%d", &value);
00016             IpAddr ip = host.getIp();
00017             printf("received from %d.%d.%d.%d:%d %d\n", ip[0], ip[1], ip[2], ip[3], host.getPort(), value);
00018         } else {
00019             char* message = "12345!";
00020             datagram.printf(message);
00021             datagram.send(multicast);
00022             printf("sent: %s\n", message);
00023             wait(1);
00024         }
00025     }
00026 }