Notes

// defines in_addr structure
#include <arpa/inet.h>

// contains constants and structures
// needed for internet domain addresses
#include <netinet/in.h>

// standard input and output library
#include <stdio.h>

// contains string functions
#include <string.h>

// for socket creation
#include <sys/socket.h>

// contains constructs that facilitate getting
// information about files attributes.
#include <sys/stat.h>

// contains a number of basic derived types
// that should be used whenever appropriate
#include <sys/types.h>

main()
{
struct sockaddr_in client;
int s, flag;
char buffer[20];

// socket create
s = socket(AF_INET, SOCK_STREAM, 0);

// assign IP, PORT
client.sin_family = AF_INET;
client.sin_port = 2000;
client.sin_addr.s_addr = inet_addr("127.0.0.1");

// connect the client socket to server socket
connect(s, (struct sockaddr*)&client, sizeof client);

for (;;) {
printf("nEnter a string to check palindrome: ");
scanf("%s", buffer);

printf("nClient: %s", buffer);
send(s, buffer, sizeof(buffer), 0);
recv(s, &flag, sizeof(int), 0);

if (flag == 1) {
printf("nServer: The string is a Palindrome.n");
break;
}
else {
printf("nServer: The string is not a palindrome.n");
break;
}
}

// close the socket
close(s);
}