Kea  2.3.4-git
pkt_filter_bpf.h
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1 // Copyright (C) 2014-2017 Internet Systems Consortium, Inc. ("ISC")
2 //
3 // This Source Code Form is subject to the terms of the Mozilla Public
4 // License, v. 2.0. If a copy of the MPL was not distributed with this
5 // file, You can obtain one at http://mozilla.org/MPL/2.0/.
6 
7 #ifndef PKT_FILTER_BPF_H
8 #define PKT_FILTER_BPF_H
9 
10 #include <dhcp/pkt_filter.h>
11 
12 #include <util/buffer.h>
13 
14 namespace isc {
15 namespace dhcp {
16 
56 class PktFilterBPF : public PktFilter {
57 public:
58 
64  virtual bool isDirectResponseSupported() const {
65  return (true);
66  }
67 
92  virtual SocketInfo openSocket(Iface& iface,
93  const isc::asiolink::IOAddress& addr,
94  const uint16_t port,
95  const bool receive_bcast,
96  const bool send_bcast);
97 
104  virtual Pkt4Ptr receive(Iface& iface, const SocketInfo& socket_info);
105 
113  virtual int send(const Iface& iface, uint16_t sockfd,
114  const Pkt4Ptr& pkt);
115 
116 private:
117 
134  void writeAFPseudoHeader(const uint32_t address_family,
135  util::OutputBuffer& out_buf);
136 
137 };
138 
139 } // namespace isc::dhcp
140 } // namespace isc
141 
142 #endif // PKT_FILTER_BPF_H
virtual SocketInfo openSocket(Iface &iface, const isc::asiolink::IOAddress &addr, const uint16_t port, const bool receive_bcast, const bool send_bcast)
Open primary and fallback socket.
Packet handling class using Berkeley Packet Filtering (BPF)
virtual Pkt4Ptr receive(Iface &iface, const SocketInfo &socket_info)
Receive packet over specified socket.
virtual int send(const Iface &iface, uint16_t sockfd, const Pkt4Ptr &pkt)
Send packet over specified socket.
Represents a single network interface.
Definition: iface_mgr.h:118
Abstract packet handling class.
Definition: pkt_filter.h:44
boost::shared_ptr< Pkt4 > Pkt4Ptr
A pointer to Pkt4 object.
Definition: pkt4.h:544
The OutputBuffer class is a buffer abstraction for manipulating mutable data.
Definition: buffer.h:294
Defines the logger used by the top-level component of kea-lfc.
virtual bool isDirectResponseSupported() const
Check if packet can be sent to the host without address directly.
Holds information about socket.
Definition: socket_info.h:19