| Index: net/dns/mdns_cache.cc
|
| diff --git a/net/dns/mdns_cache.cc b/net/dns/mdns_cache.cc
|
| deleted file mode 100644
|
| index 010a34f45d479619fc24ff4db189cfa6c5c0d88f..0000000000000000000000000000000000000000
|
| --- a/net/dns/mdns_cache.cc
|
| +++ /dev/null
|
| @@ -1,212 +0,0 @@
|
| -// Copyright (c) 2013 The Chromium Authors. All rights reserved.
|
| -// Use of this source code is governed by a BSD-style license that can be
|
| -// found in the LICENSE file.
|
| -
|
| -#include "net/dns/mdns_cache.h"
|
| -
|
| -#include <algorithm>
|
| -#include <utility>
|
| -
|
| -#include "base/stl_util.h"
|
| -#include "base/strings/string_number_conversions.h"
|
| -#include "net/dns/dns_protocol.h"
|
| -#include "net/dns/record_parsed.h"
|
| -#include "net/dns/record_rdata.h"
|
| -
|
| -// TODO(noamsml): Recursive CNAME closure (backwards and forwards).
|
| -
|
| -namespace net {
|
| -
|
| -// The effective TTL given to records with a nominal zero TTL.
|
| -// Allows time for hosts to send updated records, as detailed in RFC 6762
|
| -// Section 10.1.
|
| -static const unsigned kZeroTTLSeconds = 1;
|
| -
|
| -MDnsCache::Key::Key(unsigned type, const std::string& name,
|
| - const std::string& optional)
|
| - : type_(type), name_(name), optional_(optional) {
|
| -}
|
| -
|
| -MDnsCache::Key::Key(
|
| - const MDnsCache::Key& other)
|
| - : type_(other.type_), name_(other.name_), optional_(other.optional_) {
|
| -}
|
| -
|
| -
|
| -MDnsCache::Key& MDnsCache::Key::operator=(
|
| - const MDnsCache::Key& other) {
|
| - type_ = other.type_;
|
| - name_ = other.name_;
|
| - optional_ = other.optional_;
|
| - return *this;
|
| -}
|
| -
|
| -MDnsCache::Key::~Key() {
|
| -}
|
| -
|
| -bool MDnsCache::Key::operator<(const MDnsCache::Key& key) const {
|
| - if (name_ != key.name_)
|
| - return name_ < key.name_;
|
| -
|
| - if (type_ != key.type_)
|
| - return type_ < key.type_;
|
| -
|
| - if (optional_ != key.optional_)
|
| - return optional_ < key.optional_;
|
| - return false; // keys are equal
|
| -}
|
| -
|
| -bool MDnsCache::Key::operator==(const MDnsCache::Key& key) const {
|
| - return type_ == key.type_ && name_ == key.name_ && optional_ == key.optional_;
|
| -}
|
| -
|
| -// static
|
| -MDnsCache::Key MDnsCache::Key::CreateFor(const RecordParsed* record) {
|
| - return Key(record->type(),
|
| - record->name(),
|
| - GetOptionalFieldForRecord(record));
|
| -}
|
| -
|
| -
|
| -MDnsCache::MDnsCache() {
|
| -}
|
| -
|
| -MDnsCache::~MDnsCache() {
|
| - Clear();
|
| -}
|
| -
|
| -void MDnsCache::Clear() {
|
| - next_expiration_ = base::Time();
|
| - STLDeleteValues(&mdns_cache_);
|
| -}
|
| -
|
| -const RecordParsed* MDnsCache::LookupKey(const Key& key) {
|
| - RecordMap::iterator found = mdns_cache_.find(key);
|
| - if (found != mdns_cache_.end()) {
|
| - return found->second;
|
| - }
|
| - return NULL;
|
| -}
|
| -
|
| -MDnsCache::UpdateType MDnsCache::UpdateDnsRecord(
|
| - scoped_ptr<const RecordParsed> record) {
|
| - Key cache_key = Key::CreateFor(record.get());
|
| -
|
| - // Ignore "goodbye" packets for records not in cache.
|
| - if (record->ttl() == 0 && mdns_cache_.find(cache_key) == mdns_cache_.end())
|
| - return NoChange;
|
| -
|
| - base::Time new_expiration = GetEffectiveExpiration(record.get());
|
| - if (next_expiration_ != base::Time())
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| - new_expiration = std::min(new_expiration, next_expiration_);
|
| -
|
| - std::pair<RecordMap::iterator, bool> insert_result =
|
| - mdns_cache_.insert(std::make_pair(cache_key, (const RecordParsed*)NULL));
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| - UpdateType type = NoChange;
|
| - if (insert_result.second) {
|
| - type = RecordAdded;
|
| - } else {
|
| - const RecordParsed* other_record = insert_result.first->second;
|
| -
|
| - if (record->ttl() != 0 && !record->IsEqual(other_record, true)) {
|
| - type = RecordChanged;
|
| - }
|
| - delete other_record;
|
| - }
|
| -
|
| - insert_result.first->second = record.release();
|
| - next_expiration_ = new_expiration;
|
| - return type;
|
| -}
|
| -
|
| -void MDnsCache::CleanupRecords(
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| - base::Time now,
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| - const RecordRemovedCallback& record_removed_callback) {
|
| - base::Time next_expiration;
|
| -
|
| - // We are guaranteed that |next_expiration_| will be at or before the next
|
| - // expiration. This allows clients to eagrely call CleanupRecords with
|
| - // impunity.
|
| - if (now < next_expiration_) return;
|
| -
|
| - for (RecordMap::iterator i = mdns_cache_.begin();
|
| - i != mdns_cache_.end(); ) {
|
| - base::Time expiration = GetEffectiveExpiration(i->second);
|
| - if (now >= expiration) {
|
| - record_removed_callback.Run(i->second);
|
| - delete i->second;
|
| - mdns_cache_.erase(i++);
|
| - } else {
|
| - if (next_expiration == base::Time() || expiration < next_expiration) {
|
| - next_expiration = expiration;
|
| - }
|
| - ++i;
|
| - }
|
| - }
|
| -
|
| - next_expiration_ = next_expiration;
|
| -}
|
| -
|
| -void MDnsCache::FindDnsRecords(unsigned type,
|
| - const std::string& name,
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| - std::vector<const RecordParsed*>* results,
|
| - base::Time now) const {
|
| - DCHECK(results);
|
| - results->clear();
|
| -
|
| - RecordMap::const_iterator i = mdns_cache_.lower_bound(Key(type, name, ""));
|
| - for (; i != mdns_cache_.end(); ++i) {
|
| - if (i->first.name() != name ||
|
| - (type != 0 && i->first.type() != type)) {
|
| - break;
|
| - }
|
| -
|
| - const RecordParsed* record = i->second;
|
| -
|
| - // Records are deleted only upon request.
|
| - if (now >= GetEffectiveExpiration(record)) continue;
|
| -
|
| - results->push_back(record);
|
| - }
|
| -}
|
| -
|
| -scoped_ptr<const RecordParsed> MDnsCache::RemoveRecord(
|
| - const RecordParsed* record) {
|
| - Key key = Key::CreateFor(record);
|
| - RecordMap::iterator found = mdns_cache_.find(key);
|
| -
|
| - if (found != mdns_cache_.end() && found->second == record) {
|
| - mdns_cache_.erase(key);
|
| - return scoped_ptr<const RecordParsed>(record);
|
| - }
|
| -
|
| - return scoped_ptr<const RecordParsed>();
|
| -}
|
| -
|
| -// static
|
| -std::string MDnsCache::GetOptionalFieldForRecord(
|
| - const RecordParsed* record) {
|
| - switch (record->type()) {
|
| - case PtrRecordRdata::kType: {
|
| - const PtrRecordRdata* rdata = record->rdata<PtrRecordRdata>();
|
| - return rdata->ptrdomain();
|
| - }
|
| - default: // Most records are considered unique for our purposes
|
| - return "";
|
| - }
|
| -}
|
| -
|
| -// static
|
| -base::Time MDnsCache::GetEffectiveExpiration(const RecordParsed* record) {
|
| - base::TimeDelta ttl;
|
| -
|
| - if (record->ttl()) {
|
| - ttl = base::TimeDelta::FromSeconds(record->ttl());
|
| - } else {
|
| - ttl = base::TimeDelta::FromSeconds(kZeroTTLSeconds);
|
| - }
|
| -
|
| - return record->time_created() + ttl;
|
| -}
|
| -
|
| -} // namespace net
|
|
|