#include <stdio.h>#include <sys/socket.h>#include <netinet/in.h>#include <stdbool.h>char *copyright = "UDP SERVER		CopyRight:2008-04 xWorld\n\=========================================================";short int srv_port = 7789;/********************************/int main(int argc, char * argv[]){	printf("%s\n", copyright);		int sockfd;	sockfd = socket(AF_INET, SOCK_DGRAM, 0);	if (sockfd == -1) {		printf("Error 01: sockfd ");		exit(-1);	}	struct sockaddr_in	server,their;	server.sin_family = AF_INET;	server.sin_port	= htons(srv_port);	server.sin_addr.s_addr = INADDR_ANY;	memset(server.sin_zero, '\0', 8);	bind(sockfd, (struct sockaddr *)&server, sizeof(struct sockaddr));	printf("bind ip:%s\tport:%i\n",inet_ntoa(server.sin_addr.s_addr), srv_port);	char buf[4096];	int resize, the_len;	the_len = sizeof(struct sockaddr);	while(true){		resize = recvfrom(sockfd, buf, sizeof(buf)-1, 0,						(struct sockaddr *)&their, &the_len);			printf("%s\n", buf);		printf("\t\t%s\n", inet_ntoa(their.sin_addr));	}	close(sockfd);	return 0;}