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      1 /*
      2  * Copyright (C) 2011 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
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     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
     14  * limitations under the License.
     15  */
     16 
     17 //#define LOG_NDEBUG 0
     18 #define LOG_TAG "HTTPBase"
     19 #include <utils/Log.h>
     20 
     21 #include "include/HTTPBase.h"
     22 
     23 #include <media/stagefright/foundation/ADebug.h>
     24 #include <media/stagefright/foundation/ALooper.h>
     25 
     26 #include <cutils/properties.h>
     27 #include <cutils/qtaguid.h>
     28 
     29 #include <NetdClient.h>
     30 
     31 namespace android {
     32 
     33 HTTPBase::HTTPBase()
     34     : mNumBandwidthHistoryItems(0),
     35       mTotalTransferTimeUs(0),
     36       mTotalTransferBytes(0),
     37       mPrevBandwidthMeasureTimeUs(0),
     38       mPrevEstimatedBandWidthKbps(0),
     39       mBandWidthCollectFreqMs(5000) {
     40 }
     41 
     42 void HTTPBase::addBandwidthMeasurement(
     43         size_t numBytes, int64_t delayUs) {
     44     Mutex::Autolock autoLock(mLock);
     45 
     46     BandwidthEntry entry;
     47     entry.mDelayUs = delayUs;
     48     entry.mNumBytes = numBytes;
     49     mTotalTransferTimeUs += delayUs;
     50     mTotalTransferBytes += numBytes;
     51 
     52     mBandwidthHistory.push_back(entry);
     53     if (++mNumBandwidthHistoryItems > 100) {
     54         BandwidthEntry *entry = &*mBandwidthHistory.begin();
     55         mTotalTransferTimeUs -= entry->mDelayUs;
     56         mTotalTransferBytes -= entry->mNumBytes;
     57         mBandwidthHistory.erase(mBandwidthHistory.begin());
     58         --mNumBandwidthHistoryItems;
     59 
     60         int64_t timeNowUs = ALooper::GetNowUs();
     61         if (timeNowUs - mPrevBandwidthMeasureTimeUs >=
     62                 mBandWidthCollectFreqMs * 1000LL) {
     63 
     64             if (mPrevBandwidthMeasureTimeUs != 0) {
     65                 mPrevEstimatedBandWidthKbps =
     66                     (mTotalTransferBytes * 8E3 / mTotalTransferTimeUs);
     67             }
     68             mPrevBandwidthMeasureTimeUs = timeNowUs;
     69         }
     70     }
     71 
     72 }
     73 
     74 bool HTTPBase::estimateBandwidth(int32_t *bandwidth_bps) {
     75     Mutex::Autolock autoLock(mLock);
     76 
     77     if (mNumBandwidthHistoryItems < 2) {
     78         return false;
     79     }
     80 
     81     *bandwidth_bps = ((double)mTotalTransferBytes * 8E6 / mTotalTransferTimeUs);
     82 
     83     return true;
     84 }
     85 
     86 status_t HTTPBase::getEstimatedBandwidthKbps(int32_t *kbps) {
     87     Mutex::Autolock autoLock(mLock);
     88     *kbps = mPrevEstimatedBandWidthKbps;
     89     return OK;
     90 }
     91 
     92 status_t HTTPBase::setBandwidthStatCollectFreq(int32_t freqMs) {
     93     Mutex::Autolock autoLock(mLock);
     94 
     95     if (freqMs < kMinBandwidthCollectFreqMs
     96             || freqMs > kMaxBandwidthCollectFreqMs) {
     97 
     98         ALOGE("frequency (%d ms) is out of range [1000, 60000]", freqMs);
     99         return BAD_VALUE;
    100     }
    101 
    102     ALOGI("frequency set to %d ms", freqMs);
    103     mBandWidthCollectFreqMs = freqMs;
    104     return OK;
    105 }
    106 
    107 // static
    108 void HTTPBase::RegisterSocketUserTag(int sockfd, uid_t uid, uint32_t kTag) {
    109     int res = qtaguid_tagSocket(sockfd, kTag, uid);
    110     if (res != 0) {
    111         ALOGE("Failed tagging socket %d for uid %d (My UID=%d)", sockfd, uid, geteuid());
    112     }
    113 }
    114 
    115 // static
    116 void HTTPBase::UnRegisterSocketUserTag(int sockfd) {
    117     int res = qtaguid_untagSocket(sockfd);
    118     if (res != 0) {
    119         ALOGE("Failed untagging socket %d (My UID=%d)", sockfd, geteuid());
    120     }
    121 }
    122 
    123 // static
    124 void HTTPBase::RegisterSocketUserMark(int sockfd, uid_t uid) {
    125     setNetworkForUser(uid, sockfd);
    126 }
    127 
    128 // static
    129 void HTTPBase::UnRegisterSocketUserMark(int sockfd) {
    130     RegisterSocketUserMark(sockfd, geteuid());
    131 }
    132 
    133 }  // namespace android
    134