| /** |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include <regex> |
| #include <memory> |
| #include <algorithm> |
| #include <cctype> |
| #include <cstdint> |
| #include <cstring> |
| #include <iostream> |
| #include <iterator> |
| #include <map> |
| #include <set> |
| #include <string> |
| #include <utility> |
| #include <vector> |
| |
| #include "PcapLiveDeviceList.h" |
| #include "PcapFilter.h" |
| #include "PcapPlusPlusVersion.h" |
| #include "PcapFileDevice.h" |
| #include "PlatformSpecificUtils.h" |
| #include "core/FlowFile.h" |
| #include "core/logging/Logger.h" |
| #include "core/ProcessContext.h" |
| #include "core/Relationship.h" |
| #include "CapturePacket.h" |
| #include "ResourceClaim.h" |
| #include "utils/StringUtils.h" |
| #include "utils/ByteArrayCallback.h" |
| |
| namespace org { |
| namespace apache { |
| namespace nifi { |
| namespace minifi { |
| namespace processors { |
| |
| std::shared_ptr<utils::IdGenerator> CapturePacket::id_generator_ = utils::IdGenerator::getIdGenerator(); |
| core::Property CapturePacket::BaseDir(core::PropertyBuilder::createProperty("Base Directory")->withDescription("Scratch directory for PCAP files")->withDefaultValue<std::string>("/tmp/")->build()); |
| |
| core::Property CapturePacket::BatchSize(core::PropertyBuilder::createProperty("Batch Size")->withDescription("The number of packets to combine within a given PCAP")->withDefaultValue<uint64_t>(50)->build()); |
| core::Property CapturePacket::NetworkControllers("Network Controllers", "Regular expression of the network controller(s) to which we will attach", ".*"); |
| core::Property CapturePacket::CaptureBluetooth(core::PropertyBuilder::createProperty("Capture Bluetooth")->withDescription("True indicates that we support bluetooth interfaces")->withDefaultValue<bool>(false)->build()); |
| |
| const char *CapturePacket::ProcessorName = "CapturePacket"; |
| |
| std::string CapturePacket::generate_new_pcap(const std::string &base_path) { |
| std::string path = base_path; |
| // can use relaxed for a counter |
| int cnt = num_.fetch_add(1, std::memory_order_relaxed); |
| std::string filename = std::to_string(cnt); |
| path.append(filename); |
| return path; |
| } |
| |
| void CapturePacket::packet_callback(pcpp::RawPacket* packet, pcpp::PcapLiveDevice* dev, void* data) { |
| // parse the packet |
| PacketMovers* capture_mechanism = (PacketMovers*) data; |
| |
| CapturePacketMechanism *capture; |
| |
| if (capture_mechanism->source.try_dequeue(capture)) { |
| |
| // if needed - write the packet to the output pcap file |
| |
| if (capture->writer_ != nullptr) { |
| capture->writer_->writePacket(*packet); |
| |
| if (capture->incrementAndCheck()) { |
| |
| capture->writer_->close(); |
| |
| auto new_capture = create_new_capture(capture->getBasePath(), capture->getMaxSize()); |
| |
| capture_mechanism->sink.enqueue(capture); |
| |
| capture_mechanism->source.enqueue(new_capture); |
| } else { |
| capture_mechanism->source.enqueue(capture); |
| } |
| |
| } |
| } |
| } |
| |
| CapturePacketMechanism *CapturePacket::create_new_capture(const std::string &base_path, int64_t *max_size) { |
| CapturePacketMechanism *new_capture = new CapturePacketMechanism(base_path, generate_new_pcap(base_path), max_size); |
| new_capture->writer_ = new pcpp::PcapFileWriterDevice(new_capture->getFile().c_str()); |
| if (!new_capture->writer_->open()) |
| throw std::exception(); |
| |
| return new_capture; |
| } |
| |
| std::atomic<int> CapturePacket::num_(0); |
| core::Relationship CapturePacket::Success("success", "All files are routed to success"); |
| void CapturePacket::initialize() { |
| logger_->log_info("Initializing CapturePacket"); |
| |
| // Set the supported properties |
| std::set<core::Property> properties; |
| properties.insert(BatchSize); |
| properties.insert(NetworkControllers); |
| properties.insert(BaseDir); |
| properties.insert(CaptureBluetooth); |
| setSupportedProperties(properties); |
| // Set the supported relationships |
| std::set<core::Relationship> relationships; |
| relationships.insert(Success); |
| setSupportedRelationships(relationships); |
| } |
| |
| void CapturePacket::onSchedule(const std::shared_ptr<core::ProcessContext> &context, const std::shared_ptr<core::ProcessSessionFactory> &sessionFactory) { |
| std::string value; |
| if (context->getProperty(BatchSize.getName(), value)) { |
| core::Property::StringToInt(value, pcap_batch_size_); |
| } |
| |
| value = ""; |
| if (context->getProperty(BaseDir.getName(), value)) { |
| base_dir_ = value; |
| } |
| |
| value = ""; |
| if (context->getProperty(CaptureBluetooth.getName(), value)) { |
| utils::StringUtils::StringToBool(value, capture_bluetooth_); |
| } |
| |
| core::Property attached_controllers("Network Controllers", "List of network controllers to attach to -- each may be a regex", ".*"); |
| |
| getProperty(attached_controllers.getName(), attached_controllers); |
| |
| std::vector<std::string> allowed_interfaces = attached_controllers.getValues(); |
| |
| if (IsNullOrEmpty(base_dir_)) { |
| base_dir_ = "/tmp/"; |
| } |
| |
| utils::Identifier dir_ext; |
| |
| id_generator_->generate(dir_ext); |
| |
| base_path_ = dir_ext.to_string(); |
| |
| const std::vector<pcpp::PcapLiveDevice*>& devList = pcpp::PcapLiveDeviceList::getInstance().getPcapLiveDevicesList(); |
| for (auto iter : devList) { |
| const std::string name = iter->getName(); |
| |
| if (!allowed_interfaces.empty()) { |
| bool found_match = false; |
| std::string matching_regex = ""; |
| for (const auto &filter : allowed_interfaces) { |
| std::regex r(filter); |
| std::smatch m; |
| if (std::regex_match(name, m, r)) { |
| matching_regex = filter; |
| found_match = true; |
| break; |
| } |
| } |
| if (!found_match) { |
| logger_->log_debug("Skipping %s because it does not match any regex", name); |
| continue; |
| } else { |
| logger_->log_trace("Accepting %s because it matches %s", name, matching_regex); |
| } |
| } |
| |
| if (!iter->open()) { |
| logger_->log_error("Could not open device %s", name); |
| continue; |
| } |
| |
| if (!capture_bluetooth_) { |
| if (name.find("bluetooth") != std::string::npos) { |
| logger_->log_error("Skipping %s because blue tooth capture is not enabled", name); |
| continue; |
| } |
| } |
| |
| if (name.find("dbus") != std::string::npos) { |
| logger_->log_error("Skipping %s because dbus capture is disabled", name); |
| continue; |
| } |
| |
| if (iter->startCapture(packet_callback, mover.get())) { |
| logger_->log_debug("Starting capture on %s", iter->getName()); |
| CapturePacketMechanism *aa = create_new_capture(getPath(), &pcap_batch_size_); |
| logger_->log_trace("Creating packet capture in %s", aa->getFile()); |
| mover->source.enqueue(aa); |
| device_list_.push_back(iter); |
| } |
| } |
| |
| if (IsNullOrEmpty(devList)) { |
| logger_->log_error("Could not open any devices"); |
| throw std::exception(); |
| } |
| } |
| |
| CapturePacket::~CapturePacket() { |
| } |
| |
| void CapturePacket::onTrigger(const std::shared_ptr<core::ProcessContext> &context, const std::shared_ptr<core::ProcessSession> &session) { |
| CapturePacketMechanism *capture; |
| if (mover->sink.try_dequeue(capture)) { |
| auto ff = session->create(); |
| session->import(capture->getFile(), ff, false, 0); |
| logger_->log_debug("Received packet capture in file %s %d for %s", capture->getFile(), capture->getSize(), ff->getResourceClaim()->getContentFullPath()); |
| session->transfer(ff, Success); |
| delete capture; |
| } else { |
| context->yield(); |
| } |
| } |
| |
| } |
| /* namespace processors */ |
| } /* namespace minifi */ |
| } /* namespace nifi */ |
| } /* namespace apache */ |
| } /* namespace org */ |