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284 lines
10 KiB
C++
284 lines
10 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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/*
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*/
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/*
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Based partially on original code from nICEr and nrappkit.
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nICEr copyright:
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Copyright (c) 2007, Adobe Systems, Incorporated
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are
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met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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* Neither the name of Adobe Systems, Network Resonance nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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nrappkit copyright:
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Copyright (C) 2001-2003, Network Resonance, Inc.
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Copyright (C) 2006, Network Resonance, Inc.
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All Rights Reserved
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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3. Neither the name of Network Resonance, Inc. nor the name of any
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contributors to this software may be used to endorse or promote
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products derived from this software without specific prior written
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permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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ekr@rtfm.com Thu Dec 20 20:14:49 2001
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*/
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// Original author: bcampen@mozilla.com [:bwc]
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#ifndef test_nr_socket__
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#define test_nr_socket__
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#include "nr_socket_prsock.h"
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extern "C" {
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#include "nr_socket.h"
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}
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#include <set>
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#include <vector>
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#include <map>
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#include <list>
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#include "mozilla/UniquePtr.h"
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#include "prinrval.h"
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namespace mozilla {
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class TestNrSocket;
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/**
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* A group of TestNrSockets that behave as if they were behind the same NAT.
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* @note We deliberately avoid addref/release of TestNrSocket here to avoid
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* masking lifetime errors elsewhere.
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*/
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class TestNat {
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public:
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typedef enum {
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/** For mapping, one port is used for all destinations.
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* For filtering, allow any external address/port. */
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ENDPOINT_INDEPENDENT,
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/** For mapping, one port for each destination address (for any port).
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* For filtering, allow incoming traffic from addresses that outgoing
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* traffic has been sent to. */
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ADDRESS_DEPENDENT,
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/** For mapping, one port for each destination address/port.
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* For filtering, allow incoming traffic only from addresses/ports that
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* outgoing traffic has been sent to. */
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PORT_DEPENDENT,
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} NatBehavior;
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TestNat() :
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enabled_(false),
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filtering_type_(ENDPOINT_INDEPENDENT),
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mapping_type_(ENDPOINT_INDEPENDENT),
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mapping_timeout_(30000),
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allow_hairpinning_(false),
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refresh_on_ingress_(false),
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block_udp_(false),
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sockets_() {}
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bool has_port_mappings() const;
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// Helps determine whether we're hairpinning
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bool is_my_external_tuple(const nr_transport_addr &addr) const;
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bool is_an_internal_tuple(const nr_transport_addr &addr) const;
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int create_socket_factory(nr_socket_factory **factorypp);
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void insert_socket(TestNrSocket *socket) {
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sockets_.insert(socket);
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}
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void erase_socket(TestNrSocket *socket) {
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sockets_.erase(socket);
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}
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NS_INLINE_DECL_THREADSAFE_REFCOUNTING(TestNat);
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bool enabled_;
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TestNat::NatBehavior filtering_type_;
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TestNat::NatBehavior mapping_type_;
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uint32_t mapping_timeout_;
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bool allow_hairpinning_;
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bool refresh_on_ingress_;
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bool block_udp_;
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private:
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std::set<TestNrSocket*> sockets_;
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~TestNat(){}
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};
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/**
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* Subclass of NrSocket that can simulate things like being behind a NAT, packet
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* loss, latency, packet rewriting, etc. Also exposes some stuff that assists in
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* diagnostics.
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*/
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class TestNrSocket : public NrSocket {
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public:
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explicit TestNrSocket(TestNat *nat);
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virtual ~TestNrSocket();
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bool has_port_mappings() const;
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bool is_my_external_tuple(const nr_transport_addr &addr) const;
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// Overrides of NrSocket
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int sendto(const void *msg, size_t len,
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int flags, nr_transport_addr *to) override;
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int recvfrom(void * buf, size_t maxlen,
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size_t *len, int flags,
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nr_transport_addr *from) override;
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int connect(nr_transport_addr *addr) override;
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int write(const void *msg, size_t len, size_t *written) override;
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int read(void *buf, size_t maxlen, size_t *len) override;
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int async_wait(int how, NR_async_cb cb, void *cb_arg,
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char *function, int line) override;
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int cancel(int how) override;
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private:
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class UdpPacket {
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public:
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UdpPacket(const void *msg, size_t len, const nr_transport_addr &addr) :
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buffer_(new DataBuffer(static_cast<const uint8_t*>(msg), len)) {
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// TODO(bug 1170299): Remove const_cast when no longer necessary
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nr_transport_addr_copy(&remote_address_,
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const_cast<nr_transport_addr*>(&addr));
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}
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nr_transport_addr remote_address_;
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UniquePtr<DataBuffer> buffer_;
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NS_INLINE_DECL_THREADSAFE_REFCOUNTING(UdpPacket);
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private:
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~UdpPacket(){}
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};
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class PortMapping {
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public:
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PortMapping(const nr_transport_addr &remote_address,
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const RefPtr<NrSocket> &external_socket);
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int sendto(const void *msg, size_t len, const nr_transport_addr &to);
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int async_wait(int how, NR_async_cb cb, void *cb_arg,
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char *function, int line);
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int cancel(int how);
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int send_from_queue();
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NS_INLINE_DECL_THREADSAFE_REFCOUNTING(PortMapping);
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PRIntervalTime last_used_;
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RefPtr<NrSocket> external_socket_;
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// For non-symmetric, most of the data here doesn't matter
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nr_transport_addr remote_address_;
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private:
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~PortMapping(){}
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// If external_socket_ returns E_WOULDBLOCK, we don't want to propagate
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// that to the code using the TestNrSocket. We can also perhaps use this
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// to help simulate things like latency.
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std::list<RefPtr<UdpPacket>> send_queue_;
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};
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bool is_port_mapping_stale(const PortMapping &port_mapping) const;
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bool allow_ingress(const nr_transport_addr &from,
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PortMapping **port_mapping_used) const;
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void destroy_stale_port_mappings();
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static void port_mapping_readable_callback(void *ext_sock_v,
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int how,
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void *test_sock_v);
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void on_port_mapping_readable(NrSocket *external_socket);
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void fire_readable_callback();
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static void port_mapping_tcp_passthrough_callback(void *ext_sock_v,
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int how,
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void *test_sock_v);
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void cancel_port_mapping_async_wait(int how);
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static void port_mapping_writeable_callback(void *ext_sock_v,
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int how,
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void *test_sock_v);
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void write_to_port_mapping(NrSocket *external_socket);
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bool is_tcp_connection_behind_nat() const;
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PortMapping* get_port_mapping(const nr_transport_addr &remote_addr,
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TestNat::NatBehavior filter) const;
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PortMapping* create_port_mapping(
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const nr_transport_addr &remote_addr,
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const RefPtr<NrSocket> &external_socket) const;
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RefPtr<NrSocket> create_external_socket(
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const nr_transport_addr &remote_addr) const;
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RefPtr<NrSocket> readable_socket_;
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RefPtr<TestNat> nat_;
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// Since our comparison logic is different depending on what kind of NAT
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// we simulate, and the STL does not make it very easy to switch out the
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// comparison function at runtime, and these lists are going to be very
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// small anyway, we just brute-force it.
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std::list<RefPtr<PortMapping>> port_mappings_;
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};
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} // namespace mozilla
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#endif // test_nr_socket__
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