Untitled

#include<stdio.h>
#include<time.h>
#include<string.h>
#include<unistd.h>
#include<sys/types.h>
#include<sys/socket.h>
#include<arpa/inet.h>
#include<stdlib.h>
#include<string.h>

void main()
{
char *ip="127.0.0.1";
int port=5555;
srand(time(0));
int sockfd;
struct sockaddr_in server_addr,client_addr;
char buffer[1024];
socklen_t addr_size;
int n,i,b;
int recd[10];
for(i=0;i<10;i++)
{
recd[i]=-1;
sockfd=socket(AF_INET,SOCK_DGRAM,0);
}
if(sockfd<0)
{
perror("[-] Socket error");
exit(1);
}
memset(&server_addr,'\0',sizeof(server_addr));
server_addr.sin_family=AF_INET;
server_addr.sin_port=htons(port);
server_addr.sin_addr.s_addr=inet_addr(ip);
n=bind(sockfd,(struct sockaddr*)&server_addr,sizeof(server_addr));
if(n<0)
{
perror("[+] Bind error");
exit(1);
}
while(1)
{
bzero(buffer,1024);
addr_size=sizeof(client_addr);
recvfrom(sockfd,buffer,1024,0,(struct sockaddr*)&client_addr,&addr_size);
b=atoi(buffer);
if(recd[b]==b)
{printf("Server:Received packet %s(duplicate)\n",buffer);}
else
{
recd[b]==b;
printf("Server:Received packet %s \n",buffer);
}
sleep(1);
if(rand()%2==0)
{
printf("Server:Sending acknowledgement from packet %s \n",buffer);
sendto(sockfd,buffer,1024,0,(struct sockaddr*)&client_addr,sizeof(client_addr));
}
}
}