Android NDK check for Frida server

bool isFridaServerListening() {
    struct sockaddr_in sa;
    ssize_t ret;
    int sock;
    char res[7];

    memset(&sa, 0, sizeof(sa));

    sa.sin_family = AF_INET;
    sa.sin_port = htons(27042);

    inet_aton("127.0.0.1", &(sa.sin_addr));
    sock = socket(AF_INET, SOCK_STREAM, 0);

    if (connect(sock, (struct sockaddr *) &sa, sizeof sa) != -1) {
        send(sock, "\x00", 1, 0);
        send(sock, "AUTH\r\n", 6, 0);

        usleep(100);
        ret = recv(sock, res, 6, MSG_DONTWAIT);

        if (ret != -1) {
            if (std::string(res).find("REJECT") != std::string::npos) {
                close(sock);
                return true;
            }
        }
    }

    close(sock);
    return false;
}

Hello, I need some help can you help me?
I don't know where I have to call Frida server listening function and how
can you guide me?