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      2    Copyright 2012 The Android Open Source Project
      3 
      4    Licensed under the Apache License, Version 2.0 (the "License");
      5    you may not use this file except in compliance with the License.
      6    You may obtain a copy of the License at
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      8        http://www.apache.org/licenses/LICENSE-2.0
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     10    Unless required by applicable law or agreed to in writing, software
     11    distributed under the License is distributed on an "AS IS" BASIS,
     12    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13    See the License for the specific language governing permissions and
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     16 
     17 Tethering involves forwarding of traffic from one network interface to
     18 another using `iptables` forwarding rules. The framework periodically
     19 records tethering statistics between any interface pairs returned by
     20 `ConnectivityService.getTetheredIfacePairs()`.
     21