void clientAcceptHandler(connection *conn) {
    client *c = connGetPrivateData(conn);

    if (connGetState(conn) != CONN_STATE_CONNECTED) {
        serverLog(LL_WARNING,
                "Error accepting a client connection: %s",
                connGetLastError(conn));
        freeClientAsync(c);
        return;
    }

    /* If the server is running in protected mode (the default) and there
     * is no password set, nor a specific interface is bound, we don't accept
     * requests from non loopback interfaces. Instead we try to explain the
     * user what to do to fix it if needed. */
    if (server.protected_mode &&
        server.bindaddr_count == 0 &&
        DefaultUser->flags & USER_FLAG_NOPASS &&
        !(c->flags & CLIENT_UNIX_SOCKET))
    {
        char cip[NET_IP_STR_LEN+1] = { 0 };
        connPeerToString(conn, cip, sizeof(cip)-1, NULL);

        if (strcmp(cip,"127.0.0.1") && strcmp(cip,"::1")) {
            char *err =
                "-DENIED Redis is running in protected mode because protected "
                "mode is enabled, no bind address was specified, no "
                "authentication password is requested to clients. In this mode "
                "connections are only accepted from the loopback interface. "
                "If you want to connect from external computers to Redis you "
                "may adopt one of the following solutions: "
                "1) Just disable protected mode sending the command "
                "'CONFIG SET protected-mode no' from the loopback interface "
                "by connecting to Redis from the same host the server is "
                "running, however MAKE SURE Redis is not publicly accessible "
                "from internet if you do so. Use CONFIG REWRITE to make this "
                "change permanent. "
                "2) Alternatively you can just disable the protected mode by "
                "editing the Redis configuration file, and setting the protected "
                "mode option to 'no', and then restarting the server. "
                "3) If you started the server manually just for testing, restart "
                "it with the '--protected-mode no' option. "
                "4) Setup a bind address or an authentication password. "
                "NOTE: You only need to do one of the above things in order for "
                "the server to start accepting connections from the outside.\r\n";
            if (connWrite(c->conn,err,strlen(err)) == -1) {
                /* Nothing to do, Just to avoid the warning... */
            }
            server.stat_rejected_conn++;
            freeClientAsync(c);
            return;
        }
    }

    server.stat_numconnections++;
    moduleFireServerEvent(REDISMODULE_EVENT_CLIENT_CHANGE,
                          REDISMODULE_SUBEVENT_CLIENT_CHANGE_CONNECTED,
                          c);
}
void clientAcceptHandler(connection *conn) {
    client *c = connGetPrivateData(conn);

    if (connGetState(conn) != CONN_STATE_CONNECTED) {
        serverLog(LL_WARNING,
                "Error accepting a client connection: %s",
                connGetLastError(conn));
        freeClientAsync(c);
        return;
    }

     
    if (server.protected_mode &&
        server.bindaddr_count == 0 &&
        DefaultUser->flags & USER_FLAG_NOPASS &&
        !(c->flags & CLIENT_UNIX_SOCKET))
    {
        char cip[NET_IP_STR_LEN+1] = { 0 };
        connPeerToString(conn, cip, sizeof(cip)-1, NULL);

        if (strcmp(cip,"127.0.0.1") && strcmp(cip,"::1")) {
            char *err =
                "-DENIED Redis is running in protected mode because protected "
                "mode is enabled, no bind address was specified, no "
                "authentication password is requested to clients. In this mode "
                "connections are only accepted from the loopback interface. "
                "If you want to connect from external computers to Redis you "
                "may adopt one of the following solutions: "
                "1) Just disable protected mode sending the command "
                "'CONFIG SET protected-mode no' from the loopback interface "
                "by connecting to Redis from the same host the server is "
                "running, however MAKE SURE Redis is not publicly accessible "
                "from internet if you do so. Use CONFIG REWRITE to make this "
                "change permanent. "
                "2) Alternatively you can just disable the protected mode by "
                "editing the Redis configuration file, and setting the protected "
                "mode option to 'no', and then restarting the server. "
                "3) If you started the server manually just for testing, restart "
                "it with the '--protected-mode no' option. "
                "4) Setup a bind address or an authentication password. "
                "NOTE: You only need to do one of the above things in order for "
                "the server to start accepting connections from the outside.\r\n";
            if (connWrite(c->conn,err,strlen(err)) == -1) {
                 
            }
            server.stat_rejected_conn++;
            freeClientAsync(c);
            return;
        }
    }

    server.stat_numconnections++;
    moduleFireServerEvent(REDISMODULE_EVENT_CLIENT_CHANGE,
                          REDISMODULE_SUBEVENT_CLIENT_CHANGE_CONNECTED,
                          c);
}