108 lines
3.7 KiB
C++
108 lines
3.7 KiB
C++
/*
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* Copyright 2004 The WebRTC Project Authors. All rights reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "webrtc/base/checks.h"
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#include "webrtc/p2p/base/portallocator.h"
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namespace cricket {
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PortAllocatorSession::PortAllocatorSession(const std::string& content_name,
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int component,
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const std::string& ice_ufrag,
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const std::string& ice_pwd,
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uint32_t flags)
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: flags_(flags),
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generation_(0),
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content_name_(content_name),
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component_(component),
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ice_ufrag_(ice_ufrag),
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ice_pwd_(ice_pwd) {
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// Pooled sessions are allowed to be created with empty content name,
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// component, ufrag and password.
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RTC_DCHECK(ice_ufrag.empty() == ice_pwd.empty());
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}
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void PortAllocator::SetConfiguration(
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const ServerAddresses& stun_servers,
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const std::vector<RelayServerConfig>& turn_servers,
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int candidate_pool_size) {
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bool ice_servers_changed =
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(stun_servers != stun_servers_ || turn_servers != turn_servers_);
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stun_servers_ = stun_servers;
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turn_servers_ = turn_servers;
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// If ICE servers changed, throw away any existing pooled sessions and create
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// new ones.
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if (ice_servers_changed) {
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pooled_sessions_.clear();
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allocated_pooled_session_count_ = 0;
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}
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// If |size| is less than the number of allocated sessions, get rid of the
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// extras.
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while (allocated_pooled_session_count_ > candidate_pool_size &&
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!pooled_sessions_.empty()) {
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pooled_sessions_.front().reset(nullptr);
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pooled_sessions_.pop_front();
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--allocated_pooled_session_count_;
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}
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// If |size| is greater than the number of allocated sessions, create new
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// sessions.
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while (allocated_pooled_session_count_ < candidate_pool_size) {
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PortAllocatorSession* pooled_session = CreateSessionInternal("", 0, "", "");
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pooled_session->StartGettingPorts();
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pooled_sessions_.push_back(
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std::unique_ptr<PortAllocatorSession>(pooled_session));
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++allocated_pooled_session_count_;
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}
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target_pooled_session_count_ = candidate_pool_size;
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}
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std::unique_ptr<PortAllocatorSession> PortAllocator::CreateSession(
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const std::string& sid,
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const std::string& content_name,
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int component,
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const std::string& ice_ufrag,
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const std::string& ice_pwd) {
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auto session = std::unique_ptr<PortAllocatorSession>(
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CreateSessionInternal(content_name, component, ice_ufrag, ice_pwd));
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session->SetCandidateFilter(candidate_filter());
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return session;
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}
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std::unique_ptr<PortAllocatorSession> PortAllocator::TakePooledSession(
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const std::string& content_name,
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int component,
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const std::string& ice_ufrag,
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const std::string& ice_pwd) {
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RTC_DCHECK(!ice_ufrag.empty());
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RTC_DCHECK(!ice_pwd.empty());
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if (pooled_sessions_.empty()) {
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return nullptr;
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}
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std::unique_ptr<PortAllocatorSession> ret =
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std::move(pooled_sessions_.front());
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ret->SetIceParameters(content_name, component, ice_ufrag, ice_pwd);
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// According to JSEP, a pooled session should filter candidates only after
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// it's taken out of the pool.
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ret->SetCandidateFilter(candidate_filter());
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pooled_sessions_.pop_front();
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return ret;
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}
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const PortAllocatorSession* PortAllocator::GetPooledSession() const {
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if (pooled_sessions_.empty()) {
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return nullptr;
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}
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return pooled_sessions_.front().get();
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}
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} // namespace cricket
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