switch (state) {
            case 0: /* not connected - just return */
                return;
            case 2:
                hard = true;
            case 3: /* connected - go ahead and disconnect */
                if (response_map.size() != 0 && !hard) {
                    break; /* outstanding requests */
                }
                try {
                    doDisconnect( hard );

                if ( ch == '[' ) {
                    String server = str.substring(mark, si).trim();
                    if ( server.length() == 0 ) {
                        // this can also be a v6 address within brackets, look ahead required
                        int nexts = str.indexOf('[', si + 1);
                        int nexte = str.indexOf(']', si);
                        if ( nexts >= 0 && nexte >= 0 && nexte == nexts - 1 ) {

        case 0: /* not connected - just return */
        case 5:
        case 6:
            return false;
        case 2:
            hard = true;
        case 3: /* connected - go ahead and disconnect */
            if ( this.response_map.size() != 0 && !hard && inUse ) {
                break; /* outstanding requests */
            }
            try {
                this.state = 5;