Echo Program client and server [network lab ]

Echo server 

#include<unistd.h>

#include<sys/types.h>

#include<netinet/in.h>

#include<string.h>

#include<sys/socket.h>

main()

{

        int sd,nsd,i=0,port=6700;

        unsigned int t;

        char content[30];

        struct sockaddr_in ser,cli;

        if((sd=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP))==-1)

        {

        printf("Error:Socket creation in Server\n");

        return 0;

        }

        bzero((char*)&ser,sizeof(ser));

        printf("The port address is %d \n",port);

        ser.sin_family=AF_INET;

        ser.sin_port=htons(port);

        ser.sin_addr.s_addr=inet_addr("192.168.0.200");

        if(bind(sd,(struct sockaddr*)&ser,sizeof(ser))==-1)

        {

        printf("Error: Binding problem port busy");

        return 0;

        }

        listen(sd,1);

        printf("\tserver\n");

                        printf("************************************************************\n");

        t=sizeof(cli);

        nsd=accept(sd,(struct sockaddr*)&cli,&t);

        while(1)

        {

        read(nsd,&content[i],1);

        write(nsd,&content[i],1);

        if(content[i++]=='*')

        break;

        }

        close(nsd);

        close(sd);

        return 0;

}

Server o/p:

[cs2910007@localhost netlab]$ cc echoserver.c

[cs2910007@localhost netlab]$ ./a.out

The port address is 6700 

                        server

************************************************************

[cs2910007@localhost netlab]$ 

Echo client

#include<stdio.h>

#include<unistd.h>

#include<sys/types.h>

#include<netinet/in.h>

#include<string.h>

#include<sys/socket.h>

main()

{

        int sd,i=0,port=6700;

        char content[30]="\0";

        char cont[30]="\0";

        struct sockaddr_in ser,cli;

        if((sd=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP))==-1)

        {

                printf("Error:Socket creation in server\n");

                return 0;

        }

        bzero((char *)&ser,sizeof(ser));

        printf("The port address is %d \n",port); 

        ser.sin_family=AF_INET;

        ser.sin_port=htons(port);

        ser.sin_addr.s_addr=inet_addr("192.168.0.200");

        if(connect(sd,(struct sockaddr *)&ser,sizeof(ser))==-1)

        {

                printf("Error in connecting port busy");

                return 0;

        }

                        printf("Enter the data \n");

        while((content[i]=(char)getchar())!='*')

        {

                                               write(sd,&content[i],1);

                                                read(sd,&cont[i],1);

                putchar((int)cont[i]);

        }

       

        close(sd);

        return 0;

}              

Client o/p:

[cs2910007@localhost netlab]$ cc echoclient.c

[cs2910007@localhost netlab]$ ./a.out

The port address is 6700 

Enter the data 

695

695

kcet

kcet

kamarajcse

kamarajcse

hello

hello

*

[cs2910007@localhost netlab]$