forked from osmocom/wireshark
156 lines
6.3 KiB
C
156 lines
6.3 KiB
C
/*
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* exported_pdu.h
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* Routines for exported_pdu dissection
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* Copyright 2013, Anders Broman <anders-broman@ericsson.com>
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef EXPORTED_PDU_H
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#define EXPORTED_PDU_H
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#include "config.h"
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#include <glib.h>
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/*
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* Define different common tap names to extract PDUs at different layers,
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* otherwise one packet may be exported several times at different layers
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* if all taps are run.
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* NOTE if a new tap is added here it needs to be added to export_pdu_dlg.c
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* and packet-exported_pdu.c
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* TODO: Use an enum_val_t instead?
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*/
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#define EXPORT_PDU_TAP_NAME_LAYER_3 "OSI layer 3"
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#define EXPORT_PDU_TAP_NAME_LAYER_7 "OSI layer 7"
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#define EXPORT_PDU_TAP_NAME_DVB_CI "DVB-CI"
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#define EXPORT_PDU_TAP_NAME_LOGCAT "Logcat"
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/**
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* This struct is used as the data part of tap_queue_packet() and contains a
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* buffer with metadata of the protocol PDU included in the tvb in the struct.
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* the meta data is in TLV form, at least one tag MUST indicate what protocol is
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* in the PDU.
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* Buffer layout:
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* 0 1 2 3
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* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | Option Code | Option Length |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* / Option Value /
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* / variable length, aligned to 32 bits /
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* / /
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* / . . . other options . . . /
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* / /
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | Option Code == opt_endofopt | Option Length == 0 |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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*/
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/* Tag values
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*
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* Do NOT add new values to this list without asking
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* wireshark-dev[AT]wireshark.org for a value. Otherwise, you run the risk of
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* using a value that's already being used for some other purpose, and of
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* having tools that read exported_pdu captures not being able to handle
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* captures with your new tag value, with no hope that they will ever be
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* changed to do so (as that would destroy their ability to read captures
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* using that value for that other purpose).
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*/
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#define EXP_PDU_TAG_END_OF_OPT 0 /**< End-of-options Tag. */
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/* 1 - 9 reserved */
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#define EXP_PDU_TAG_OPTIONS_LENGTH 10 /**< Total length of the options excluding this TLV */
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#define EXP_PDU_TAG_LINKTYPE 11 /**< The value part is the linktype value defined by tcpdump
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* http://www.tcpdump.org/linktypes.html
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*/
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#define EXP_PDU_TAG_PROTO_NAME 12 /**< The value part should be an ASCII non NULL terminated string
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* of the short protocol name used by Wireshark e.g "sip"
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* Will be used to call the next dissector.
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*/
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/* Add protocol type related tags here.
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* NOTE Only one protocol type tag may be present in a packet, the first one
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* found will be used*/
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/* 13 - 19 reserved */
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#define EXP_PDU_TAG_IPV4_SRC 20
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#define EXP_PDU_TAG_IPV4_DST 21
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#define EXP_PDU_TAG_IPV6_SRC 22
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#define EXP_PDU_TAG_IPV6_DST 23
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#define EXP_PDU_TAG_PORT_TYPE 24
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#define EXP_PDU_TAG_SRC_PORT 25
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#define EXP_PDU_TAG_DST_PORT 26
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#define EXP_PDU_TAG_SS7_OPC 28
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#define EXP_PDU_TAG_SS7_DPC 29
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#define EXP_PDU_TAG_ORIG_FNO 30
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#define EXP_PDU_TAG_DVBCI_EVT 31
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typedef struct _exp_pdu_data_t {
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guint tlv_buffer_len;
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guint8 *tlv_buffer;
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guint tvb_captured_length;
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guint tvb_reported_length;
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tvbuff_t *pdu_tvb;
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} exp_pdu_data_t;
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/* 1st byte of optional tags bitmap */
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#define EXP_PDU_TAG_IP_SRC_BIT 0x01
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#define EXP_PDU_TAG_IP_DST_BIT 0x02
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#define EXP_PDU_TAG_SRC_PORT_BIT 0x04
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#define EXP_PDU_TAG_DST_PORT_BIT 0x08
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#define EXP_PDU_TAG_SS7_OPC_BIT 0x20
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#define EXP_PDU_TAG_SS7_DPC_BIT 0x40
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#define EXP_PDU_TAG_ORIG_FNO_BIT 0x80
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/* 2nd byte of optional tags bitmap */
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#define EXP_PDU_TAG_DVBCI_EVT_BIT 0x01
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#define EXP_PDU_TAG_IPV4_SRC_LEN 4
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#define EXP_PDU_TAG_IPV4_DST_LEN 4
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#define EXP_PDU_TAG_IPV6_SRC_LEN 16
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#define EXP_PDU_TAG_IPV6_DST_LEN 16
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#define EXP_PDU_TAG_PORT_TYPE_LEN 4
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#define EXP_PDU_TAG_SRC_PORT_LEN 4
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#define EXP_PDU_TAG_DST_PORT_LEN 4
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#define EXP_PDU_TAG_SS7_OPC_LEN 8 /* 4 bytes PC, 2 bytes standard type, 1 byte NI, 1 byte padding */
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#define EXP_PDU_TAG_SS7_DPC_LEN 8 /* 4 bytes PC, 2 bytes standard type, 1 byte NI, 1 byte padding */
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#define EXP_PDU_TAG_ORIG_FNO_LEN 4
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#define EXP_PDU_TAG_DVBCI_EVT_LEN 1
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/**
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* Allocates and fills the exp_pdu_data_t struct according to the wanted_exp_tags
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* bit field of wanted_exp_tags_len bytes length
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* If proto_name is != NULL, wtap_encap must be -1 or vice-versa
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*
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* The tags in the tag buffer SHOULD be added in numerical order.
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*/
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WS_DLL_PUBLIC exp_pdu_data_t *load_export_pdu_tags(packet_info *pinfo, const char* proto_name,
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int wtap_encap, guint8 *wanted_exp_tags, guint16 wanted_exp_tags_len);
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#endif /* EXPORTED_PDU_H */
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