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Diffstat (limited to 'src/core/object/pcap.lua')
-rw-r--r-- | src/core/object/pcap.lua | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/src/core/object/pcap.lua b/src/core/object/pcap.lua new file mode 100644 index 0000000..3d49326 --- /dev/null +++ b/src/core/object/pcap.lua @@ -0,0 +1,98 @@ +-- Copyright (c) 2018-2021, OARC, Inc. +-- All rights reserved. +-- +-- This file is part of dnsjit. +-- +-- dnsjit 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. +-- +-- dnsjit 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 dnsjit. If not, see <http://www.gnu.org/licenses/>. + +-- dnsjit.core.object.pcap +-- Container of a packet found in a PCAP +-- +-- Container of a PCAP packet which contains information both from the PCAP +-- itself and the +-- .I pcap_pkthdr +-- object receied for each packet in the PCAP. +-- .SS Attributes +-- .TP +-- snaplen +-- Max length saved portion of each packet. +-- .TP +-- linktype +-- Data link type for the PCAP. +-- .TP +-- ts +-- Time stamp of this packet. +-- .TP +-- caplen +-- Length of portion present. +-- .TP +-- len +-- Length of this packet (off wire). +-- .TP +-- bytes +-- A pointer to the packet. +-- .TP +-- is_swapped +-- Indicate if the byte order of the PCAP is different then the host. +-- This is used in, for example, the Layer filter to correctly parse null +-- objects since they are stored in the capturers host byte order. +module(...,package.seeall) + +require("dnsjit.core.object.pcap_h") +local ffi = require("ffi") +local C = ffi.C + +local t_name = "core_object_pcap_t" +local core_object_pcap_t +local Pcap = {} + +-- Return the textual type of the object. +function Pcap:type() + return "pcap" +end + +-- Return the previous object. +function Pcap:prev() + return self.obj_prev +end + +-- Cast the object to the underlining object module and return it. +function Pcap:cast() + return self +end + +-- Cast the object to the generic object module and return it. +function Pcap:uncast() + return ffi.cast("core_object_t*", self) +end + +-- Make a copy of the object and return it. +function Pcap:copy() + return C.core_object_pcap_copy(self) +end + +-- Free the object, should only be used on copies or otherwise allocated. +function Pcap:free() + C.core_object_pcap_free(self) +end + +core_object_pcap_t = ffi.metatype(t_name, { __index = Pcap }) + +-- dnsjit.core.object (3), +-- dnsjit.input.pcap (3), +-- dnsjit.input.fpcap (3), +-- dnsjit.input.mmpcap (3), +-- dnsjit.filter.layer (3), +-- dnsjit.output.pcap (3) +return Pcap |