Method setsockopt

net/kernel_socket.cpp:737–742

    }

    int setsockopt(int level, int option_name, const void* option_value, socklen_t option_len) override {
        if (fstack_setsockopt(m_listen_fd, level, option_name, option_value, option_len) != 0) {
            LOG_ERRNO_RETURN(EINVAL, -1, "failed to setsockopt");
        }
        return m_opts.put_opt(level, option_name, option_value, option_len);
    }

    int getsockopt(int level, int option_name, void* option_value, socklen_t* option_len) override {
        if (fstack_getsockopt(m_listen_fd, level, option_name, option_value, option_len) == 0)