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// Copyright (C) 2012-2023 Internet Systems Consortium, Inc. ("ISC")
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
#ifndef PERF_SOCKET_H
#define PERF_SOCKET_H
#include <perfdhcp/command_options.h>
#include <dhcp/pkt4.h>
#include <dhcp/pkt6.h>
#include <dhcp/socket_info.h>
#include <dhcp/iface_mgr.h>
namespace isc {
namespace perfdhcp {
/// \brief Socket wrapper structure.
///
/// This is a base class that is inherited by PerfSocket
/// and unit tests derived that. This way it allows mocking
/// out socket operations and avoid using real network
/// interfaces.
class BasePerfSocket : public dhcp::SocketInfo {
public:
/// Interface index.
unsigned int ifindex_;
/// \brief Default constructor of BasePerfSocket.
BasePerfSocket() :
SocketInfo(asiolink::IOAddress("127.0.0.1"), 0, 0),
ifindex_(0) {}
/// \brief Destructor of the socket wrapper class.
virtual ~BasePerfSocket() = default;
/// \brief See description of this method in PerfSocket class below.
virtual dhcp::Pkt4Ptr receive4(uint32_t timeout_sec, uint32_t timeout_usec) = 0;
/// \brief See description of this method in PerfSocket class below.
virtual dhcp::Pkt6Ptr receive6(uint32_t timeout_sec, uint32_t timeout_usec) = 0;
/// \brief See description of this method in PerfSocket class below.
virtual bool send(const dhcp::Pkt4Ptr& pkt) = 0;
/// \brief See description of this method in PerfSocket class below.
virtual bool send(const dhcp::Pkt6Ptr& pkt) = 0;
/// \brief See description of this method in PerfSocket class below.
virtual dhcp::IfacePtr getIface() = 0;
};
/// \brief Socket wrapper structure.
///
/// This is the wrapper that holds descriptor of the socket
/// used to run DHCP test. The wrapped socket is closed in
/// the destructor. This prevents resource leaks when
/// function that created the socket ends (normally or
/// when exception occurs). This structure extends parent
/// structure with new field ifindex_ that holds interface
/// index where socket is bound to.
class PerfSocket : public BasePerfSocket {
public:
/// \brief Constructor of socket wrapper class.
///
/// This constructor uses provided socket descriptor to
/// find the name of the interface where socket has been
/// bound to.
PerfSocket(CommandOptions& options);
/// \brief Destructor of the socket wrapper class.
///
/// Destructor closes wrapped socket.
virtual ~PerfSocket();
/// \brief Receive DHCPv4 packet from interface.
///
/// \param timeout_sec number of seconds for waiting for a packet,
/// \param timeout_usec number of microseconds for waiting for a packet,
/// \return received packet or nullptr if timed out
virtual dhcp::Pkt4Ptr receive4(uint32_t timeout_sec, uint32_t timeout_usec) override;
/// \brief Receive DHCPv6 packet from interface.
///
/// \param timeout_sec number of seconds for waiting for a packet,
/// \param timeout_usec number of microseconds for waiting for a packet,
/// \return received packet or nullptr if timed out
virtual dhcp::Pkt6Ptr receive6(uint32_t timeout_sec, uint32_t timeout_usec) override;
/// \brief Send DHCPv4 packet through interface.
///
/// \param pkt a packet for sending
/// \return true if operation succeeded
virtual bool send(const dhcp::Pkt4Ptr& pkt) override;
/// \brief Send DHCPv6 packet through interface.
///
/// \param pkt a packet for sending
/// \return true if operation succeeded
virtual bool send(const dhcp::Pkt6Ptr& pkt) override;
/// \brief Get interface from IfaceMgr.
///
/// \return shared pointer to Iface.
virtual dhcp::IfacePtr getIface() override;
protected:
/// \brief Initialize socket data.
///
/// This method initializes members of the class that Interface
/// Manager holds: interface name, local address.
///
/// \throw isc::BadValue if interface for specified socket
/// descriptor does not exist.
void initSocketData();
/// \brief Open socket to communicate with DHCP server.
///
/// Method opens socket and binds it to local address. Function will
/// use either interface name, local address or server address
/// to create a socket, depending on what is available (specified
/// from the command line). If socket can't be created for any
/// reason, exception is thrown.
/// If destination address is broadcast (for DHCPv4) or multicast
/// (for DHCPv6) than broadcast or multicast option is set on
/// the socket. Opened socket is registered and managed by IfaceMgr.
///
/// \throw isc::BadValue if socket can't be created for given
/// interface, local address or remote address.
/// \throw isc::InvalidOperation if broadcast option can't be
/// set for the v4 socket or if multicast option can't be set
/// for the v6 socket.
/// \throw isc::Unexpected if internal unexpected error occurred.
/// \return socket descriptor.
int openSocket(CommandOptions& options) const;
};
}
}
#endif /* PERF_SOCKET_H */
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