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

#define PORT 9090

int main() {
    int sockfd;
    struct sockaddr_in servaddr;

    sockfd = socket(AF_INET, SOCK_STREAM, 0);
    if (sockfd < 0) { perror("socket"); exit(1); }

    memset(&servaddr, 0, sizeof(servaddr));
    servaddr.sin_family = AF_INET;
    servaddr.sin_port = htons(PORT);
    servaddr.sin_addr.s_addr = inet_addr("192.168.2.1");

    if (connect(sockfd, (struct sockaddr *)&servaddr, sizeof(servaddr)) < 0) {
        perror("connect"); exit(1);
    }

    printf("Connected to server.\n");

    // Without sending data, server will not accept()
    sleep(3); // Wait to observe Wireshark (optional)

    const char *msg = "Hello Server!";
    write(sockfd, msg, strlen(msg));
    printf("Sent message: %s\n", msg);

    char buffer[1024];
    int n = read(sockfd, buffer, sizeof(buffer)-1);
    buffer[n] = '\0';
    printf("Received from server: %s\n", buffer);

    close(sockfd);
    return 0;
}