mirror of
https://github.com/mfontanini/libtins
synced 2026-01-23 02:35:57 +01:00
421 lines
12 KiB
C++
421 lines
12 KiB
C++
/*
|
|
* Copyright (c) 2016, Matias Fontanini
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are
|
|
* met:
|
|
*
|
|
* * Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* * Redistributions in binary form must reproduce the above
|
|
* copyright notice, this list of conditions and the following disclaimer
|
|
* in the documentation and/or other materials provided with the
|
|
* distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
|
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
|
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
*/
|
|
|
|
#ifndef TINS_TCP_IP_STREAM_H
|
|
#define TINS_TCP_IP_STREAM_H
|
|
|
|
#include "../config.h"
|
|
|
|
#ifdef TINS_HAVE_TCPIP
|
|
|
|
#include <vector>
|
|
#include <array>
|
|
#include <map>
|
|
#include <functional>
|
|
#include <chrono>
|
|
#include <stdint.h>
|
|
#include <boost/any.hpp>
|
|
#include "../macros.h"
|
|
#include "../hw_address.h"
|
|
#include "flow.h"
|
|
|
|
namespace Tins {
|
|
|
|
class PDU;
|
|
class TCP;
|
|
class IPv4Address;
|
|
class IPv6Address;
|
|
|
|
namespace TCPIP {
|
|
|
|
/**
|
|
* \brief Represents a TCP stream
|
|
*
|
|
* A TCP stream is made out of 2 Flows, one in each direction, plus
|
|
* some other attributes and callbacks.
|
|
*
|
|
* This class works using callbacks. Whenever the stream is created, you should
|
|
* set at least the client/server callbacks so you are notified whenever the
|
|
* client/server has sent data. Note that setting these is not mandatory, so
|
|
* you can subscribe to just the callbacks you need.
|
|
*
|
|
* \sa Stream::auto_cleanup_payloads
|
|
*/
|
|
class TINS_API Stream {
|
|
public:
|
|
/**
|
|
* The type used to store payloads
|
|
*/
|
|
typedef Flow::payload_type payload_type;
|
|
|
|
/**
|
|
* The type used to represent timestamps
|
|
*/
|
|
typedef std::chrono::microseconds timestamp_type;
|
|
|
|
/**
|
|
* The type used for callbacks
|
|
*/
|
|
typedef std::function<void(Stream&)> stream_callback_type;
|
|
|
|
/**
|
|
* The type used for packet-triggered callbacks
|
|
*
|
|
* /sa Flow::buffering_callback
|
|
*/
|
|
typedef std::function<void(Stream&,
|
|
uint32_t,
|
|
const payload_type&)> stream_packet_callback_type;
|
|
|
|
/**
|
|
* The type used to store hardware addresses
|
|
*/
|
|
typedef HWAddress<6> hwaddress_type;
|
|
|
|
|
|
/**
|
|
* \brief Constructs a TCP stream using the provided packet.
|
|
*
|
|
* \param initial_packet The first packet of the stream
|
|
* \param ts The first packet's timestamp
|
|
*/
|
|
Stream(PDU& initial_packet, const timestamp_type& ts = timestamp_type());
|
|
|
|
/**
|
|
* \brief Processes this packet.
|
|
*
|
|
* This will forward the packet appropriately to the client
|
|
* or server flow.
|
|
*
|
|
* \param packet The packet to be processed
|
|
* \param ts The packet's timestamp
|
|
*/
|
|
void process_packet(PDU& packet, const timestamp_type& ts);
|
|
|
|
/**
|
|
* \brief Processes this packet.
|
|
*
|
|
* This will forward the packet appropriately to the client
|
|
* or server flow.
|
|
*
|
|
* \param packet The packet to be processed
|
|
*/
|
|
void process_packet(PDU& packet);
|
|
|
|
/**
|
|
* Getter for the client flow
|
|
*/
|
|
Flow& client_flow();
|
|
|
|
/**
|
|
* Getter for the client flow (const)
|
|
*/
|
|
const Flow& client_flow() const;
|
|
|
|
/**
|
|
* Getter for the server flow
|
|
*/
|
|
Flow& server_flow();
|
|
|
|
/**
|
|
* Getter for the server flow (const)
|
|
*/
|
|
const Flow& server_flow() const;
|
|
|
|
/**
|
|
* \brief Indicates whether this stream is finished.
|
|
*
|
|
* This stream is finished if either peer sent a packet with
|
|
* the RST flag on, or both peers sent a FIN.
|
|
*/
|
|
bool is_finished() const;
|
|
|
|
/**
|
|
* Indicates whether this packet uses IPv6 addresses
|
|
*/
|
|
bool is_v6() const;
|
|
|
|
/**
|
|
* \brief Retrieves the client's IPv4 address
|
|
*
|
|
* Note that it's only valid to call this method if is_v6() == false
|
|
*/
|
|
IPv4Address client_addr_v4() const;
|
|
|
|
/**
|
|
* \brief Retrieves the client's IPv6 address
|
|
*
|
|
* Note that it's only valid to call this method if is_v6() == true
|
|
*/
|
|
IPv6Address client_addr_v6() const;
|
|
|
|
/**
|
|
* \brief Retrieves the client's hardware address.
|
|
*
|
|
* Note that this is not the actual hardware address of the client, but
|
|
* just the address seen from packets coming from it. If the client
|
|
* is on another network, then this will be the address of the last
|
|
* device (switch, route, etc) the packet went through.
|
|
*/
|
|
const hwaddress_type& client_hw_addr() const;
|
|
|
|
/**
|
|
* \brief Retrieves the server's hardware address.
|
|
*
|
|
* Note that this is not the actual hardware address of the server, but
|
|
* just the address seen from packets coming from it. If the server
|
|
* is on another network, then this will be the address of the last
|
|
* device (switch, route, etc) the packet went through.
|
|
*/
|
|
const hwaddress_type& server_hw_addr() const;
|
|
|
|
/**
|
|
* \brief Retrieves the server's IPv4 address
|
|
*
|
|
* Note that it's only valid to call this method if is_v6() == false
|
|
*/
|
|
IPv4Address server_addr_v4() const;
|
|
|
|
/**
|
|
* \brief Retrieves the server's IPv6 address
|
|
*
|
|
* Note that it's only valid to call this method if is_v6() == true
|
|
*/
|
|
IPv6Address server_addr_v6() const;
|
|
|
|
/**
|
|
* Getter for the client's port
|
|
*/
|
|
uint16_t client_port() const;
|
|
|
|
/**
|
|
* Getter for the server's port
|
|
*/
|
|
uint16_t server_port() const;
|
|
|
|
/**
|
|
* Getter for the client's payload (const)
|
|
*/
|
|
const payload_type& client_payload() const;
|
|
|
|
/**
|
|
* Getter for the client's payload
|
|
*/
|
|
payload_type& client_payload();
|
|
|
|
/**
|
|
* Getter for the server's payload (const)
|
|
*/
|
|
const payload_type& server_payload() const;
|
|
|
|
/**
|
|
* Getter for the server's payload
|
|
*/
|
|
payload_type& server_payload();
|
|
|
|
/**
|
|
* Getter for the creation time of this stream
|
|
*/
|
|
const timestamp_type& create_time() const;
|
|
|
|
/**
|
|
* Getter for the last seen time of this stream
|
|
*/
|
|
const timestamp_type& last_seen() const;
|
|
|
|
/**
|
|
* \brief Sets the callback to be executed when the stream is closed
|
|
*
|
|
* \param callback The callback to be set
|
|
*/
|
|
void stream_closed_callback(const stream_callback_type& callback);
|
|
|
|
/**
|
|
* \brief Sets the callback to be executed when there's client data
|
|
*
|
|
* \sa Flow::data_callback
|
|
* \param callback The callback to be set
|
|
*/
|
|
void client_data_callback(const stream_callback_type& callback);
|
|
|
|
/**
|
|
* \brief Sets the callback to be executed when there's server data
|
|
*
|
|
* \sa Flow::data_callback
|
|
* \param callback The callback to be set
|
|
*/
|
|
void server_data_callback(const stream_callback_type& callback);
|
|
|
|
/**
|
|
* \brief Sets the callback to be executed when there's new buffered
|
|
* client data
|
|
*
|
|
* \sa Flow::buffering_callback
|
|
* \param callback The callback to be set
|
|
*/
|
|
void client_out_of_order_callback(const stream_packet_callback_type& callback);
|
|
|
|
/**
|
|
* \brief Sets the callback to be executed when there's new buffered
|
|
* client data
|
|
*
|
|
* \sa Flow::buffering_callback
|
|
* \param callback The callback to be set
|
|
*/
|
|
void server_out_of_order_callback(const stream_packet_callback_type& callback);
|
|
|
|
/**
|
|
* \brief Indicates that the data packets sent by the client should be
|
|
* ignored
|
|
*
|
|
* \sa Flow::ignore_data_packets
|
|
*/
|
|
void ignore_client_data();
|
|
|
|
/**
|
|
* \brief Indicates that the data packets sent by the server should be
|
|
* ignored
|
|
*
|
|
* \sa Flow::ignore_data_packets
|
|
*/
|
|
void ignore_server_data();
|
|
|
|
/**
|
|
* \brief Sets the internal callbacks.
|
|
*
|
|
* This shouldn't normally need to be called except if you're constructing
|
|
* this object and then moving it around before persisting it somewhere.
|
|
*/
|
|
void setup_flows_callbacks();
|
|
|
|
/**
|
|
* \brief Indicates whether each flow's payloads should be automatically
|
|
* erased.
|
|
*
|
|
* If this property is true, then whenever there's new data for a stream,
|
|
* the appropriate callback will be executed and then the payload will be
|
|
* erased.
|
|
*
|
|
* If this property is false, then the payload <b>will not</b> be erased
|
|
* and the user is responsible for clearing the payload vector.
|
|
*
|
|
* Setting this property to false is useful if it's desired to hold all
|
|
* of the data sent on the stream before processing it. Note that this
|
|
* can lead to the memory growing a lot.
|
|
*
|
|
* This property is true by default.
|
|
*
|
|
* \param value The value to be set for this property
|
|
*/
|
|
void auto_cleanup_payloads(bool value);
|
|
|
|
/**
|
|
* \brief Indicates whether the client flow's payloads should be
|
|
* automatically erased.
|
|
*
|
|
* \sa auto_cleanup_payloads
|
|
*/
|
|
void auto_cleanup_client_data(bool value);
|
|
|
|
/**
|
|
* \brief Indicates whether the server flow's payloads should be
|
|
* automatically erased.
|
|
*
|
|
* \sa auto_cleanup_payloads
|
|
*/
|
|
void auto_cleanup_server_data(bool value);
|
|
|
|
/**
|
|
* Enables tracking of acknowledged segments
|
|
*
|
|
* \sa Flow::enable_ack_tracking
|
|
*/
|
|
void enable_ack_tracking();
|
|
|
|
/**
|
|
* \brief Indicates whether ACK number tracking is enabled for this stream
|
|
*/
|
|
bool ack_tracking_enabled() const;
|
|
|
|
/**
|
|
* \brief Create or retrieve an application-specific payload for this stream.
|
|
*
|
|
* The first call to this method will create user data as specified by the
|
|
* template parameter (using a mandatory default constructor). Subsequent calls
|
|
* have to be made with the same template parameter or the method will fail with
|
|
* boost::bad_any_cast. In any case, the method returns a reference to the user
|
|
* data.
|
|
*
|
|
* \return A reference to a user data block in the stream.
|
|
*/
|
|
template<typename T>
|
|
T& user_data() {
|
|
if (user_data_.empty()) {
|
|
user_data_ = T();
|
|
};
|
|
return boost::any_cast<T&>(user_data_);
|
|
}
|
|
|
|
private:
|
|
static Flow extract_client_flow(const PDU& packet);
|
|
static Flow extract_server_flow(const PDU& packet);
|
|
|
|
void on_client_flow_data(const Flow& flow);
|
|
void on_server_flow_data(const Flow& flow);
|
|
void on_client_out_of_order(const Flow& flow,
|
|
uint32_t seq,
|
|
const payload_type& payload);
|
|
void on_server_out_of_order(const Flow& flow,
|
|
uint32_t seq,
|
|
const payload_type& payload);
|
|
|
|
Flow client_flow_;
|
|
Flow server_flow_;
|
|
stream_callback_type on_stream_closed_;
|
|
stream_callback_type on_client_data_callback_;
|
|
stream_callback_type on_server_data_callback_;
|
|
stream_packet_callback_type on_client_out_of_order_callback_;
|
|
stream_packet_callback_type on_server_out_of_order_callback_;
|
|
hwaddress_type client_hw_addr_;
|
|
hwaddress_type server_hw_addr_;
|
|
timestamp_type create_time_;
|
|
timestamp_type last_seen_;
|
|
bool auto_cleanup_client_;
|
|
bool auto_cleanup_server_;
|
|
|
|
boost::any user_data_;
|
|
};
|
|
|
|
} // TCPIP
|
|
} // Tins
|
|
|
|
#endif // TINS_HAVE_TCPIP
|
|
|
|
#endif // TINS_TCP_IP_STREAM_H
|