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/* server.c */
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
static int port = 6666;
int main(void)
{
int socket_descriptor;
struct sockaddr_in address;
socket_descriptor = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
if (socket_descriptor == -1) {
perror("socket()");
exit(EXIT_FAILURE);
}
memset(&address, 0, sizeof(address));
address.sin_family = AF_INET;
address.sin_addr.s_addr = inet_addr("224.0.0.1");
address.sin_port = htons(port);
if(fcntl(socket_descriptor, F_SETFL, fcntl(socket_descriptor, F_GETFL) | O_NONBLOCK) < 0) {
perror("fcntl:SOCK_SET_NONBLOCK");
}
printf("Server ist bereit ...\n");
/* Broadcasting beginnen */
while (1) {
char message[256];
if (sendto(socket_descriptor, "broadcast test (hallo client)",
sizeof("broadcast test (hallo client)"), 0,
(struct sockaddr *)&address, sizeof(address))
< 0) {
perror("sendto()");
exit(EXIT_FAILURE);
}
recv(socket_descriptor, message, 256, 0);
sleep(1);
}
return EXIT_SUCCESS;
}
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