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#if CHROMIUM_AVAILABLE
24#include "include/chromium_http_stub.h"
25#endif
26
27#include <media/stagefright/foundation/ADebug.h>
28#include <media/stagefright/foundation/ALooper.h>
29
30#include <cutils/properties.h>
31#include <cutils/qtaguid.h>
32
33namespace android {
34
35HTTPBase::HTTPBase()
36    : mNumBandwidthHistoryItems(0),
37      mTotalTransferTimeUs(0),
38      mTotalTransferBytes(0),
39      mPrevBandwidthMeasureTimeUs(0),
40      mPrevEstimatedBandWidthKbps(0),
41      mBandWidthCollectFreqMs(5000),
42      mUIDValid(false),
43      mUID(0) {
44}
45
46// static
47sp<HTTPBase> HTTPBase::Create(uint32_t flags) {
48#if CHROMIUM_AVAILABLE
49        HTTPBase *dataSource = createChromiumHTTPDataSource(flags);
50        if (dataSource) {
51           return dataSource;
52        }
53#endif
54    {
55        TRESPASS();
56
57        return NULL;
58    }
59}
60
61// static
62status_t HTTPBase::UpdateProxyConfig(
63        const char *host, int32_t port, const char *exclusionList) {
64#if CHROMIUM_AVAILABLE
65    return UpdateChromiumHTTPDataSourceProxyConfig(host, port, exclusionList);
66#else
67    return INVALID_OPERATION;
68#endif
69}
70
71void HTTPBase::addBandwidthMeasurement(
72        size_t numBytes, int64_t delayUs) {
73    Mutex::Autolock autoLock(mLock);
74
75    BandwidthEntry entry;
76    entry.mDelayUs = delayUs;
77    entry.mNumBytes = numBytes;
78    mTotalTransferTimeUs += delayUs;
79    mTotalTransferBytes += numBytes;
80
81    mBandwidthHistory.push_back(entry);
82    if (++mNumBandwidthHistoryItems > 100) {
83        BandwidthEntry *entry = &*mBandwidthHistory.begin();
84        mTotalTransferTimeUs -= entry->mDelayUs;
85        mTotalTransferBytes -= entry->mNumBytes;
86        mBandwidthHistory.erase(mBandwidthHistory.begin());
87        --mNumBandwidthHistoryItems;
88
89        int64_t timeNowUs = ALooper::GetNowUs();
90        if (timeNowUs - mPrevBandwidthMeasureTimeUs >=
91                mBandWidthCollectFreqMs * 1000LL) {
92
93            if (mPrevBandwidthMeasureTimeUs != 0) {
94                mPrevEstimatedBandWidthKbps =
95                    (mTotalTransferBytes * 8E3 / mTotalTransferTimeUs);
96            }
97            mPrevBandwidthMeasureTimeUs = timeNowUs;
98        }
99    }
100
101}
102
103bool HTTPBase::estimateBandwidth(int32_t *bandwidth_bps) {
104    Mutex::Autolock autoLock(mLock);
105
106    if (mNumBandwidthHistoryItems < 2) {
107        return false;
108    }
109
110    *bandwidth_bps = ((double)mTotalTransferBytes * 8E6 / mTotalTransferTimeUs);
111
112    return true;
113}
114
115status_t HTTPBase::getEstimatedBandwidthKbps(int32_t *kbps) {
116    Mutex::Autolock autoLock(mLock);
117    *kbps = mPrevEstimatedBandWidthKbps;
118    return OK;
119}
120
121status_t HTTPBase::setBandwidthStatCollectFreq(int32_t freqMs) {
122    Mutex::Autolock autoLock(mLock);
123
124    if (freqMs < kMinBandwidthCollectFreqMs
125            || freqMs > kMaxBandwidthCollectFreqMs) {
126
127        ALOGE("frequency (%d ms) is out of range [1000, 60000]", freqMs);
128        return BAD_VALUE;
129    }
130
131    ALOGI("frequency set to %d ms", freqMs);
132    mBandWidthCollectFreqMs = freqMs;
133    return OK;
134}
135
136void HTTPBase::setUID(uid_t uid) {
137    mUIDValid = true;
138    mUID = uid;
139}
140
141bool HTTPBase::getUID(uid_t *uid) const {
142    if (!mUIDValid) {
143        return false;
144    }
145
146    *uid = mUID;
147
148    return true;
149}
150
151// static
152void HTTPBase::RegisterSocketUserTag(int sockfd, uid_t uid, uint32_t kTag) {
153    int res = qtaguid_tagSocket(sockfd, kTag, uid);
154    if (res != 0) {
155        ALOGE("Failed tagging socket %d for uid %d (My UID=%d)", sockfd, uid, geteuid());
156    }
157}
158
159// static
160void HTTPBase::UnRegisterSocketUserTag(int sockfd) {
161    int res = qtaguid_untagSocket(sockfd);
162    if (res != 0) {
163        ALOGE("Failed untagging socket %d (My UID=%d)", sockfd, geteuid());
164    }
165}
166
167}  // namespace android
168