mirror of
https://github.com/mfontanini/libtins
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106 lines
3.2 KiB
C++
106 lines
3.2 KiB
C++
/*
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* Copyright (c) 2017, Matias Fontanini
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* All rights reserved.
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*
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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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*
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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
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* copyright notice, this list of conditions and the following disclaimer
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* in the documentation and/or other materials provided with the
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* distribution.
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*
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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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*
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*/
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#include <sstream>
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#include <functional>
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#include <mutex>
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#include <condition_variable>
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#include "packet_capturer.h"
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using std::string;
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using std::thread;
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using std::move;
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using std::bind;
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using std::condition_variable;
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using std::unique_lock;
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using std::lock_guard;
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using std::mutex;
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using std::ostringstream;
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using Tins::PDU;
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using Tins::Sniffer;
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using Tins::SnifferConfiguration;
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PacketCapturer::PacketCapturer(const Configuration& configuration) {
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SnifferConfiguration sniffer_config;
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sniffer_config.set_filter(make_filter(configuration));
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sniffer_config.set_immediate_mode(true);
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sniffer_.reset(new Sniffer(configuration.interface().name(), sniffer_config));
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}
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void PacketCapturer::start_capture() {
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using std::placeholders::_1;
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mutex mtx;
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condition_variable cond;
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bool started = false;
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running_ = true;
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sniffer_thread_ = thread([&]() {
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{
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lock_guard<mutex> _(mtx);
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started = true;
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cond.notify_one();
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}
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sniffer_->sniff_loop(bind(&PacketCapturer::callback, this, _1));
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});
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unique_lock<mutex> locker(mtx);
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while (!started) {
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cond.wait(locker);
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}
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}
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void PacketCapturer::stop_capture() {
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running_ = false;
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sniffer_->stop_sniff();
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sniffer_thread_.join();
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}
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PacketCapturer::PacketStorage PacketCapturer::captured_packets() {
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return move(storage_);
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}
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bool PacketCapturer::callback(const PDU& pdu) {
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storage_.emplace_back(pdu.clone());
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return running_;
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}
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string PacketCapturer::make_filter(const Configuration& configuration) const {
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ostringstream oss;
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oss << "((tcp or udp) and (port " << configuration.source_port()
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<< " or port " << configuration.destination_port() << ")) or icmp"
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// Fragmentted IP packets
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<< " or (ip[6:2] & 0x1fff) > 0"
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<< " or arp";
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return oss.str();
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}
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