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TCP Client-Server Program to Check if a Given String is a Palindrome
A Palindrome is a word, phrase, or sequence that reads the same backward as forward, e.g., "madam" or "nurses run".
TCP Client-Server Program
Client and server configuration in which a client connects transmits a string to the server, and the server displays the original string and sends a confirmation to the client through socket connection whether the string is a palindrome or not.
Input − WOW
Output − Palindrome
Input − soap
Output − Not Palindrome
How Does It Work?
First, establish a client-server connection.
After the connection is established, the client utilizes the send system function to deliver the user input string to the server.
The server will wait for a string supplied by the client on the client-side.
The reading system call is used by the server to read the string.
After that, the server determines whether or not the string is a palindrome and returns the confirmation to the client.
Compiling
Run the server application as a GCC server first.
server./server c –o
Run the GCC client program on a different terminal.
client./client c -o
The client's string is being awaited by the server software.
Client-side, enter the string.
The original string will be printed by the server software.
The result will be printed by the client software.
TCP Server
#include <arpa/inet.h>
#include <netinet/in.h>
#include <stdio.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/types.h>
main(){
struct sockaddr_in client, server;
int s1, n, sock, g, j, left, right, flag;
char b11[20], b2[10], b3[10], b4[10];
s1 = socket(AF_INET, SOCK_STREAM, 0);
server.sin_family = AF_INET;
server.sin_port = 20000;
server.sin_addr.s_addr = inet_addr("127.0.0.1");
bind(s1, (struct sockaddr*)&server, sizeof server);
listen(s1, 1);
n = sizeof client;
sock = accept(s1, (struct sockaddr*)&client, &n);
for (;;) {
recv(sock, b11, sizeof(b1), 0);
printf("
The string received is:%s
", b11);
if (strlen(b11) == 0)
flag = 1;
else {
left = 0;
right = strlen(b11) - 1;
flag = 1;
while (left < right && flag) {
if (b11[left] != b11[right])
flag = 0;
else {
left++;
right--;
}
}
}
send(sock, &flag, sizeof(int), 0);
break;
}
close(sock);
close(s1);
}Client
#include <arpa/inet.h>
#include <netinet/in.h>
#include <stdio.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/types.h>
main(){
struct sockaddr_in client;
int s, flag;
char buffer[20];
s = socket(AF_NET, SOCK_STREAM, 0);
client.sin_family = AF_NET;
client.sin_port = 20000;
client.sin_addr.s_addr = inet_addr("127.0.0.1");
connect(s, (struct sockaddr*)&client, sizeof client);
for (;;) {
printf("
Enter a string to check palindrome: ");
scanf("%s", buffer);
printf("
Client: %s", buffer);
send(s, buffer, sizeof(buffer), 0);
recv(s, &flag, sizeof(int), 0);
if (flag == 1) {
printf("
Server: The string is Palindrome.
");
break;
}
else {
printf("
Server: The string isn't a palindrome.
");
break;
}
}
close(s);
}
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