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#include <sys/types.h>
#include <sys/socket.h>
#include <sys/select.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <pthread.h>
#include <cstring>
#include <cstdlib>
#include <iostream>
#include <time.h>
int main()
{
struct sockaddr_in server_sockaddr,client_sockaddr;
int sin_size,recvBytes;
int sockfd,client_fd;
char buf[256];
sin_size = sizeof(struct sockaddr);
sockfd = socket(AF_INET,SOCK_STREAM,0);
server_sockaddr.sin_family = AF_INET;
server_sockaddr.sin_port = htons(1504);
server_sockaddr.sin_addr.s_addr = INADDR_ANY;
bzero(&(server_sockaddr.sin_zero),8);
fd_set readfds;
if( -1 == bind(sockfd,(struct sockaddr*)&server_sockaddr,sizeof(struct sockaddr)))
{
 
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