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249 | -- SPDX-License-Identifier: GPL-3.0-or-later
------------------------------------------------------------------------
-- pla-util - A power line adapter utility
-- Copyright (C) 2016-2023 John Serock
--
-- This file is part of pla-util.
--
-- pla-util is free software: you can redistribute it and/or modify
-- it under the terms of the GNU General Public License as published by
-- the Free Software Foundation, either version 3 of the License, or
-- (at your option) any later version.
--
-- pla-util is distributed in the hope that it will be useful,
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-- GNU General Public License for more details.
--
-- You should have received a copy of the GNU General Public License
-- along with this program. If not, see <http://www.gnu.org/licenses/>.
------------------------------------------------------------------------
with Interfaces.C.Strings;
with Octets;
with System;
private package Packets.Pcap is
DLT_EN10MB : constant Interfaces.C.int := 1;
ERRBUF_SIZE : constant := 256;
NETMASK_UNKNOWN : constant Interfaces.C.unsigned := 16#ffffffff#;
POLLIN : constant := 1;
type BPF_Instruction_Type is
record
Code : aliased Interfaces.C.unsigned_short;
Jt : aliased Interfaces.C.unsigned_char;
Jf : aliased Interfaces.C.unsigned_char;
K : aliased Interfaces.C.unsigned;
end record
with
Convention => C_Pass_By_Copy;
type BPF_Instruction_Access_Type is access BPF_Instruction_Type;
type BPF_Program_Type is
record
Length : aliased Interfaces.C.unsigned := 0;
Instructions : BPF_Instruction_Access_Type := null;
end record
with
Convention => C_Pass_By_Copy;
type BPF_Program_Access_Type is access all BPF_Program_Type;
type BPF_Program_Constant_Access_Type is access constant BPF_Program_Type;
subtype Error_Buffer_Type is Interfaces.C.char_array (1 .. ERRBUF_SIZE);
type Direction_Type is (D_In_Out, D_In, D_Out)
with
Convention => C;
type Time_Value_Type is
record
Seconds : aliased Interfaces.C.long;
Microseconds : aliased Interfaces.C.long;
end record
with
Convention => C_Pass_By_Copy;
type Packet_Header_Type is
record
Timestamp : aliased Time_Value_Type;
Capture_Length : aliased Interfaces.C.unsigned;
Packet_Length : aliased Interfaces.C.unsigned;
end record
with
Convention => C_Pass_By_Copy;
type Packet_Header_Access_Type is access Packet_Header_Type;
type Pcap_Type is private;
type Pcap_Access_Type is access Pcap_Type;
type Pcap_Stats_Type is
record
Received : aliased Interfaces.C.unsigned;
Dropped : aliased Interfaces.C.unsigned;
IF_Dropped : aliased Interfaces.C.unsigned;
end record
with
Convention => C_Pass_By_Copy;
type Poll_File_Descriptor_Type is
record
File_Descriptor : aliased Interfaces.C.int;
Requested_Events : aliased Interfaces.C.short;
Returned_Events : aliased Interfaces.C.short;
end record
with
Convention => C_Pass_By_Copy;
type Poll_File_Descriptors_Type is array (1 .. 1) of Poll_File_Descriptor_Type;
function Activate (P : Pcap_Access_Type) return Interfaces.C.int
with
Import => True,
Convention => C,
External_Name => "pcap_activate";
procedure Close (P : Pcap_Access_Type)
with
Import => True,
Convention => C,
External_Name => "pcap_close";
function Compile (P : Pcap_Access_Type;
Filter_Program : out BPF_Program_Type;
Filter_Expression : Interfaces.C.char_array;
Optimize : Interfaces.C.int;
Netmask : Interfaces.C.unsigned := NETMASK_UNKNOWN) return Interfaces.C.int
with
Import => True,
Convention => C,
External_Name => "pcap_compile";
function Create (Network_Device_Name : Interfaces.C.char_array;
Error_Buffer : out Error_Buffer_Type) return Pcap_Access_Type
with
Import => True,
Convention => C,
External_Name => "pcap_create";
function Datalink (P : Pcap_Access_Type) return Interfaces.C.int
with
Import => True,
Convention => C,
External_Name => "pcap_datalink";
procedure Free_Code (Filter_Program : BPF_Program_Access_Type)
with
Import => True,
Convention => C,
External_Name => "pcap_freecode";
function Get_Error_Text (P : Pcap_Access_Type) return Interfaces.C.Strings.chars_ptr
with
Import => True,
Convention => C,
External_Name => "pcap_geterr";
function Get_Selectable_File_Descriptor (P : Pcap_Access_Type) return Interfaces.C.int
with
Import => True,
Convention => C,
External_Name => "pcap_get_selectable_fd";
function Library_Version return Interfaces.C.Strings.chars_ptr
with
Import => True,
Convention => C,
External_Name => "pcap_lib_version";
function Poll (File_Descriptors : in out Poll_File_Descriptors_Type;
Number_Of_File_Descriptors : Interfaces.C.unsigned_long := 1;
Timeout_Milliseconds : Interfaces.C.int) return Interfaces.C.int
with
Import => True,
Convention => C,
External_Name => "poll";
function Receive_Packet (P : Pcap_Access_Type;
Packet_Header : out Packet_Header_Access_Type;
Packet_Data : out System.Address) return Interfaces.C.int
with
Import => True,
Convention => C,
External_Name => "pcap_next_ex";
function Send_Packet (P : Pcap_Access_Type;
Buffer : Octets.Octets_Type;
Packet_Size : Interfaces.C.int) return Interfaces.C.int
with
Import => True,
Convention => C,
External_Name => "pcap_sendpacket";
function Set_Datalink (P : Pcap_Access_Type;
DLT : Interfaces.C.int) return Interfaces.C.int
with
Import => True,
Convention => C,
External_Name => "pcap_set_datalink";
function Set_Direction (P : Pcap_Access_Type;
Direction : Direction_Type) return Interfaces.C.int
with
Import => True,
Convention => C,
External_Name => "pcap_setdirection";
function Set_Filter (P : Pcap_Access_Type;
Filter_Program : BPF_Program_Constant_Access_Type) return Interfaces.C.int
with
Import => True,
Convention => C,
External_Name => "pcap_setfilter";
function Set_Immediate_Mode (P : Pcap_Access_Type;
Immediate_Mode : Interfaces.C.int) return Interfaces.C.int
with
Import => True,
Convention => C,
External_Name => "pcap_set_immediate_mode";
function Set_Nonblock (P : Pcap_Access_Type;
Nonblock : Interfaces.C.int;
Error_Buffer : out Error_Buffer_Type) return Interfaces.C.int
with
Import => True,
Convention => C,
External_Name => "pcap_setnonblock";
function Set_Snapshot_Length (P : Pcap_Access_Type;
Snapshot_Length : Interfaces.C.int) return Interfaces.C.int
with
Import => True,
Convention => C,
External_Name => "pcap_set_snaplen";
function Stats (P : Pcap_Access_Type;
Stats : out Pcap_Stats_Type) return Interfaces.C.int
with
Import => True,
Convention => C,
External_Name => "pcap_stats";
function Status_To_String (Error : Interfaces.C.int) return Interfaces.C.Strings.chars_ptr
with
Import => True,
Convention => C,
External_Name => "pcap_statustostr";
private
type Pcap_Type is null record
with
Convention => C_Pass_By_Copy;
end Packets.Pcap;
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