training_repo/tcp_client_server/client.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <arpa/inet.h>
#define SERVER_ADDR "127.0.0.1"
#define PORT 8083
#define BUFFER_SIZE 1024

int main()
{
int client_socket;
struct sockaddr_in server_addr={0};
char buffer[BUFFER_SIZE];
// Create socket
if ((client_socket = socket(AF_INET, SOCK_STREAM, 0)) < 0)
{
    perror("Socket creation failed");
    exit(EXIT_FAILURE);
}
// Define server address
server_addr.sin_family = AF_INET;
server_addr.sin_port = htons(PORT);
server_addr.sin_addr.s_addr = inet_addr(SERVER_ADDR);
// Convert IP address to binary form
//if (inet_pton(AF_INET, "127.0.0.1", &server_addr.sin_addr) <= 0)
//{
  //  perror("Invalid address");
    //exit(EXIT_FAILURE);
//}
// Connect to the server
if (connect(client_socket, (struct sockaddr *)&server_addr, sizeof(server_addr)) < 0)
{
    perror("Connection failed");
    close(client_socket);
    exit(EXIT_FAILURE);
}

printf("Connected to server\n");
//for(int i=0;i<6;i++)
  //  {
    // Send a message to the server
    const char *message = "testing!";
    send(client_socket, message, strlen(message), 0);
        printf("Message sent to server: %s\n",message );
    //}
//Receive server's response
int n = recv(client_socket, buffer, BUFFER_SIZE, 0);
if (n < 0)
{
    perror("Receive failed");
    close(client_socket);
    exit(EXIT_FAILURE);
}
buffer[n] = '\0';  // Null-terminate the received string
printf("Received from server: %s\n", buffer);
// Close the socket
close(client_socket);
return 0;
}