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94 lines
2.7 KiB
C++
94 lines
2.7 KiB
C++
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef NET_QUIC_TEST_TOOLS_SIMULATOR_SWITCH_H_
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#define NET_QUIC_TEST_TOOLS_SIMULATOR_SWITCH_H_
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#include <deque>
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#include "net/quic/platform/api/quic_containers.h"
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#include "net/quic/test_tools/simulator/queue.h"
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namespace net {
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namespace simulator {
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typedef size_t SwitchPortNumber;
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// Simulates a network switch with simple persistent learning scheme and queues
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// on every output port.
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class Switch {
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public:
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Switch(Simulator* simulator,
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std::string name,
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SwitchPortNumber port_count,
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QuicByteCount queue_capacity);
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~Switch();
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// Returns Endpoint associated with the port under number |port_number|. Just
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// like on most real switches, port numbering starts with 1.
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inline Endpoint* port(SwitchPortNumber port_number) {
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DCHECK_NE(port_number, 0u);
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return &ports_[port_number - 1];
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}
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inline const Queue* port_queue(SwitchPortNumber port_number) const {
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return ports_[port_number - 1].queue();
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}
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inline Queue* port_queue(SwitchPortNumber port_number) {
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return ports_[port_number - 1].queue();
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}
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private:
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class Port : public Endpoint, public UnconstrainedPortInterface {
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public:
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Port(Simulator* simulator,
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std::string name,
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Switch* parent,
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SwitchPortNumber port_number,
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QuicByteCount queue_capacity);
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Port(Port&&) = delete;
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~Port() override {}
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// Accepts packet to be routed into the switch.
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void AcceptPacket(std::unique_ptr<Packet> packet) override;
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// Enqueue packet to be routed out of the switch.
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void EnqueuePacket(std::unique_ptr<Packet> packet);
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UnconstrainedPortInterface* GetRxPort() override;
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void SetTxPort(ConstrainedPortInterface* port) override;
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void Act() override;
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inline bool connected() const { return connected_; }
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inline const Queue* queue() const { return &queue_; }
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inline Queue* queue() { return &queue_; }
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private:
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Switch* parent_;
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SwitchPortNumber port_number_;
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bool connected_;
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Queue queue_;
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DISALLOW_COPY_AND_ASSIGN(Port);
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};
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// Sends the packet to the appropriate port, or to all ports if the
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// appropriate port is not known.
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void DispatchPacket(SwitchPortNumber port_number,
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std::unique_ptr<Packet> packet);
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// This can not be a QuicDeque since pointers into this are
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// assumed to be stable.
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std::deque<Port> ports_;
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QuicUnorderedMap<std::string, Port*> switching_table_;
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DISALLOW_COPY_AND_ASSIGN(Switch);
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};
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} // namespace simulator
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} // namespace net
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#endif // NET_QUIC_TEST_TOOLS_SIMULATOR_SWITCH_H_
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