#include<stdio.h>     //printf,scanf fun
#include<string.h>       //bzero fun
//#include<sys/types.h>
#include<sys/socket.h>  //socket,connect,bind,listen,accept,read,write fun
#include<netinet/in.h>  //socket address structure,htons,htonl fun
#include<arpa/inet.h>  //pton,ntop,aton,ntoa fun
//#include<errno.h>
#define tcpport 7137

#define ipaddr "192.168.0.2"
int main()
{
        int length;
        int sockfd,clientfd,count=0;
        struct sockaddr_in server,client;
        char buffer[100];
       sockfd=socket(AF_INET,SOCK_STREAM,0);    // non negative value if ok, -1 on error

        if(sockfd==-1)
        {
                perror("Error in creating the socket -  server");
                exit(1);
}
        bzero(&server,sizeof(server));
        server.sin_family=AF_INET;
        server.sin_port=htons(tcpport);
         if(inet_pton(AF_INET,ipaddr,&server.sin_addr)<0)  // 0 if ok, -1 on error
        {
                perror("Error in address conversion");
                close(sockfd);
                exit(1);
        }
        if(bind(sockfd,(struct sockaddr *)&server,sizeof(server))<0) // 0 if ok, -1 on error
        {
                perror("Error in binding");
                close(sockfd);
                exit(1);
        }
        if(listen(sockfd,1)<0)   // 0 if ok, -1 on error
        {
                perror("Error in listen");
                close(sockfd);
          exit(1);
        }
        length=sizeof(client);
        clientfd=(accept(sockfd,(struct sockaddr *)&client, &length));  // non negative value if ok, -1 on error
        if(clientfd==-1)
        {
                perror("Error in accept");
                close(sockfd);
                exit(1);
        }
while(1)
{
 if(read(clientfd,buffer,sizeof(buffer))<0)   // no of bytes read from socket if ok, -1 on error
        {
                perror("Error in read of buffer");
                close(sockfd);
                exit(1);
        }
       printf("\n per1:\t %s",buffer);
printf("\nper2 : ");
gets(buffer);
        if(write(clientfd,buffer,sizeof(buffer))<0)
{
perror("error");
close(sockfd);
exit(1);
}
printf("enetr");
if(strcmp(buffer,"bye")==0)
break;
}
        close(sockfd);    // 0 if ok, -1 on error

}