#include <unistd.h>
#include <stdio.h>
#include <netinet/in.h>
#include <errno.h>

main()
{
    int child_sock;
    int sock;
    struct sockaddr_in addr;
    int rc;
    int proc;

    sock = socket(PF_INET, SOCK_STREAM, 0);
    printf("socket() -> %d(%d)\n", sock, errno);

    addr.sin_family = AF_INET;
    addr.sin_port = htons(12345);
    addr.sin_addr.s_addr = inet_addr("10.0.1.1");
    rc = bind(sock, (struct sockaddr *)&addr, sizeof(addr));
    printf("bind() -> %d(%d)\n", rc, errno);

    rc = listen(sock, 1);
    printf("listen() -> %d(%d)\n", rc, errno);

    sleep(1);

    rc = shutdown(sock, SHUT_RD);
    printf("shutdown() -> %d(%d)\n", rc, errno);

    proc = fork();
    if (proc)
    {
        child_sock = socket(PF_INET, SOCK_STREAM, 0);
        printf("Child: socket() -> %d(%d)\n", child_sock, errno);
        rc = connect(child_sock, (struct sockaddr *)&addr, sizeof(addr));
        printf("connect() -> %d(%d)\n", rc, errno);
    }
    else
    {
        printf("Waiting...\n");getchar();
    }

    return 0;
}