training_repo/UDP/client1.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <arpa/inet.h>

#define PORT 8080
#define BUFFER_SIZE 1024

int main() {
    int sockfd;
    char buffer[BUFFER_SIZE];
    struct sockaddr_in server_addr;

    
    if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
        perror("Socket creation failed");
        exit(EXIT_FAILURE);
    }

      memset(&server_addr, 0, sizeof(server_addr));
    server_addr.sin_family = AF_INET;
    server_addr.sin_port = htons(PORT);
    server_addr.sin_addr.s_addr = inet_addr("127.0.0.1"); // Change to server IP if needed

   
    printf("Enter message to send to server: ");
    scanf("%[^\n]", buffer); 

    sendto(sockfd, buffer, strlen(buffer), 0, (const struct sockaddr *)&server_addr, sizeof(server_addr));

    char buf[20];
    recvfrom(sockfd,buf, sizeof(buf), 0, NULL, NULL);
    printf("Received message length from server: %s\n",buf); 

    close(sockfd);
    return 0;
}