computer networks lab 6 tcp socket

 Write a program using TCP socket for wired network for following

a. Say Hello to Each other

b. File transfer.

Server Program:

/****************** SERVER CODE ****************/

#include <stdio.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <string.h>

int main(){
int welcomeSocket, newSocket;
char buffer[1024];
struct sockaddr_in serverAddr;
struct sockaddr_storage serverStorage;
socklen_t addr_size;

welcomeSocket = socket(PF_INET, SOCK_STREAM, 0);

serverAddr.sin_family = AF_INET;

serverAddr.sin_port = htons(7891);
serverAddr.sin_addr.s_addr = inet_addr(“127.0.0.1”);
memset(serverAddr.sin_zero, ‘\0’, sizeof serverAddr.sin_zero);

bind(welcomeSocket, (struct sockaddr *) &serverAddr, sizeof(serverAddr));

if(listen(welcomeSocket,5)==0)
printf(“Listening\n”);
else
printf(“Error\n”);

addr_size = sizeof serverStorage;
newSocket = accept(welcomeSocket, (struct sockaddr *) &serverStorage, &addr_size);

strcpy(buffer,”Hello World\n”);
send(newSocket,buffer,13,0);

return 0;
}

Client Program:

/****************** CLIENT CODE ****************/

#include <stdio.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <string.h>

int main(){
int clientSocket;
char buffer[1024];
struct sockaddr_in serverAddr;
socklen_t addr_size;

clientSocket = socket(PF_INET, SOCK_STREAM, 0);

serverAddr.sin_family = AF_INET;
serverAddr.sin_port = htons(7891);
serverAddr.sin_addr.s_addr = inet_addr(“127.0.0.1”);
memset(serverAddr.sin_zero, ‘\0’, sizeof serverAddr.sin_zero);

addr_size = sizeof serverAddr;
connect(clientSocket, (struct sockaddr *) &serverAddr, addr_size);

recv(clientSocket, buffer, 1024, 0);

printf(“Data received: %s”,buffer);

return 0;
}