Added Card Application Toolkit Transport Protocol (CATTP) dissector

Bug: 10843
Change-Id: I35350d98b4225be12875b16e67506f7385ea9f28
Reviewed-on: https://code.wireshark.org/review/6111
Petri-Dish: Pascal Quantin <pascal.quantin@gmail.com>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Pascal Quantin <pascal.quantin@gmail.com>
This commit is contained in:
Sebastian Kloeppel 2015-01-15 11:19:41 +01:00 committed by Pascal Quantin
parent ffa8bdd3ca
commit 6010d99a1f
4 changed files with 609 additions and 0 deletions

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@ -95,6 +95,7 @@ Riemann
MACsec Key Agreement - EAPoL-MKA
DJI UAV Drone Control Protocol
ZVT Kassenschnittstelle
ETSI Card Application Toolkit - Transport Protocol
--sort-and-group--
=== Updated Protocol Support

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@ -455,6 +455,7 @@ set(DISSECTOR_SRC
dissectors/packet-carp.c
dissectors/packet-cast.c
dissectors/packet-catapult-dct2000.c
dissectors/packet-cattp.c
dissectors/packet-ccsds.c
dissectors/packet-cdp.c
dissectors/packet-cell_broadcast.c

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@ -370,6 +370,7 @@ DISSECTOR_SRC = \
packet-carp.c \
packet-cast.c \
packet-catapult-dct2000.c \
packet-cattp.c \
packet-ccsds.c \
packet-cdp.c \
packet-cell_broadcast.c \

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@ -0,0 +1,606 @@
/* packet-cattp.c
* Routines for packet dissection of
* ETSI TS 102 127 v6.13.0 (Release 6 / 2009-0r45)
* Card Application Toolkit - Transport Protocol over UDP
*
* Copyright 2014-2014 by Sebastian Kloeppel <sk [at] nakedape.net>
* Cristina E. Vintila <cristina.vintila [at] gmail.com>
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* This program 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 2
* of the License, or (at your option) any later version.
*
* This program 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include <epan/prefs.h>
#include <epan/packet.h>
#include <epan/in_cksum.h>
#define CATTP_SHORTNAME "CAT-TP"
#define CATTP_HBLEN 18
#define F_SYN 0x80
#define F_ACK 0x40
#define F_EAK 0x20
#define F_RST 0x10
#define F_NUL 0x08
#define F_SEG 0x04
/* bit masks for the first header byte. */
#define M_FLAGS 0xFC /* flags only, no version */
#define M_PDU_SYN 0xB8 /* SYN (ACK,SEG dont care) without version*/
#define M_PDU_ACK 0xD0 /* ACK (EAK,SEG,NUL dont care) without version */
#define M_PDU_RST 0xBC /* RST (ACK dont care) without version */
#define M_VERSION 0x03 /* only Version */
#define ICCID_PREFIX 0x98
static int proto_cattp = -1;
static dissector_handle_t cattp_handle;
static gint ett_cattp = -1;
static gint ett_cattp_id = -1;
static gint ett_cattp_flags = -1;
static gint ett_cattp_eaks = -1;
static int hf_cattp_flags = -1;
/* flag components */
static int hf_cattp_flag_syn = -1;
static int hf_cattp_flag_ack = -1;
static int hf_cattp_flag_eak = -1;
static int hf_cattp_flag_rst = -1;
static int hf_cattp_flag_nul = -1;
static int hf_cattp_flag_seg = -1;
static int hf_cattp_version = -1;
/* structure of flag components */
static const int *cattp_flags[] = {
&hf_cattp_flag_syn,
&hf_cattp_flag_ack,
&hf_cattp_flag_eak,
&hf_cattp_flag_rst,
&hf_cattp_flag_nul,
&hf_cattp_flag_seg,
&hf_cattp_version,
NULL
};
static int hf_cattp_hlen = -1;
static int hf_cattp_srcport = -1;
static int hf_cattp_dstport = -1;
static int hf_cattp_datalen = -1;
static int hf_cattp_seq = -1;
static int hf_cattp_ack = -1;
static int hf_cattp_windowsize = -1;
static int hf_cattp_checksum = -1;
static int hf_cattp_identification = -1;
static int hf_cattp_iccid = -1;
static int hf_cattp_idlen = -1;
static int hf_cattp_maxpdu = -1;
static int hf_cattp_maxsdu = -1;
static int hf_cattp_rc = -1;
static int hf_cattp_eaklen = -1;
static int hf_cattp_eaks = -1;
static dissector_handle_t data_handle;
/* Preference to control whether to check the CATTP checksum */
static gboolean cattp_check_checksum = TRUE;
/* Preference to control whether to heuristically detect CATTP packets */
static gboolean cattp_enable_heuristic_dissection = TRUE;
/* Reason code mapping */
static const value_string cattp_reset_reason[] = {
{ 0, "Normal Ending" },
{ 1, "Connection set-up failed, illegal parameters" },
{ 2, "Temporarily unable to set up this connection" },
{ 3, "Requested Port not available" },
{ 4, "Unexpected PDU received" },
{ 5, "Maximum retries exceeded" },
{ 6, "Version not supported" },
{ 7, "RFU" },
{ 0, NULL }
};
/* Forward declartion due to use of heuristic dissection preference. */
void proto_reg_handoff_cattp(void);
/* Dissection of SYN PDUs */
static guint32
dissect_cattp_synpdu(tvbuff_t *tvb, packet_info *pinfo, proto_tree *cattp_tree, guint32 offset)
{
proto_item *idi, *id_tree;
guint8 idlen;
proto_tree_add_item(cattp_tree, hf_cattp_maxpdu, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
proto_tree_add_item(cattp_tree, hf_cattp_maxsdu, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
idlen = tvb_get_guint8(tvb,offset);
idi = proto_tree_add_uint(cattp_tree, hf_cattp_idlen, tvb, offset, 1, idlen);
offset++;
col_append_fstr(pinfo->cinfo,COL_INFO," IdLen=%u ",idlen);
id_tree = proto_item_add_subtree(idi, ett_cattp_id);
if (idlen > 0) {
guint8 first_id_byte;
first_id_byte = tvb_get_guint8(tvb,offset);
proto_tree_add_item(id_tree, hf_cattp_identification, tvb, offset, idlen, ENC_NA);
/* Optional code. Checks whether identification field may be an ICCID.
* It has to be considered to move this logic to another layer / dissector.
* However it is common to send ICCID as Identification for OTA download. */
if (idlen <= 10 && idlen >= 9 && ICCID_PREFIX == first_id_byte) {
wmem_strbuf_t *buf;
int i;
buf = wmem_strbuf_new(wmem_packet_scope(), "");
/* switch nibbles */
for (i = 0; i < idlen; i++) {
guint8 c, n;
c = tvb_get_guint8(tvb,offset + i);
n = ((c & 0xF0) >> 4) + ((c & 0x0F) << 4);
wmem_strbuf_append_printf(buf,"%02X",n);
}
proto_tree_add_string(id_tree, hf_cattp_iccid, tvb, offset,
idlen, wmem_strbuf_get_str(buf));
}
offset += idlen;
}
return offset;
}
/* Dissection of Extended Acknowledgement PDUs */
static guint32
dissect_cattp_eakpdu(tvbuff_t *tvb, packet_info *pinfo, proto_tree *cattp_tree, guint32 offset, guint8 hlen)
{
proto_item *eaki;
guint8 eak_count;
eak_count = (hlen - offset) >> 1;
eaki = proto_tree_add_uint_format_value(cattp_tree, hf_cattp_eaklen, tvb, offset, eak_count * 2,
eak_count, "%u PDUs", eak_count);
if (eak_count > 0) {
proto_item *eak_tree;
int i;
col_append_fstr(pinfo->cinfo,COL_INFO," EAKs=%u",eak_count);
eak_tree = proto_item_add_subtree(eaki,ett_cattp_eaks);
for (i = 0; i < eak_count; i++) {
proto_tree_add_item(eak_tree, hf_cattp_eaks, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
}
}
return offset;
}
/* Dissection of Extended Acknowledgement PDUs */
static guint32
dissect_cattp_rstpdu(tvbuff_t *tvb, packet_info *pinfo, proto_tree *cattp_tree, guint32 offset)
{
guint8 rc;
const gchar* rc_str;
rc = tvb_get_guint8(tvb, offset); /* reason code of RST */
rc_str = val_to_str(rc,cattp_reset_reason,"Unknown reason code: 0x%02x");
col_append_fstr(pinfo->cinfo,COL_INFO," Reason=\"%s\" ", rc_str);
proto_tree_add_item(cattp_tree, hf_cattp_rc, tvb, offset, 1, ENC_BIG_ENDIAN);
return ++offset;
}
/* Dissection of the base header */
static void
dissect_cattp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
const char* pdutype = "[Unknown PDU]";
proto_item *ti, *cattp_tree;
guint32 offset;
gushort computed_chksum;
vec_t cksum_vec[1];
int header_offset;
guint cksum_data_len;
guint8 flags, first_byte, hlen, ver;
guint16 plen, chksum, ackno, seqno, wsize, sport, dport;
col_set_str(pinfo->cinfo, COL_PROTOCOL, CATTP_SHORTNAME);
/* Clear out stuff in the info column */
col_clear(pinfo->cinfo,COL_INFO);
hlen = tvb_get_guint8(tvb,3); /* lookahead header len. */
offset = 0;
ti = proto_tree_add_protocol_format(tree, proto_cattp, tvb, offset, hlen,
"Card Application Toolkit Transport Protocol");
cattp_tree = proto_item_add_subtree(ti, ett_cattp);
/* render flags tree */
first_byte = tvb_get_guint8(tvb,offset);
flags = first_byte & M_FLAGS; /* discard version from first byte for flags*/
ver = first_byte & M_VERSION; /* discard flags for version */
proto_tree_add_bitmask(cattp_tree, tvb, offset, hf_cattp_flags ,ett_cattp_flags, cattp_flags, ENC_BIG_ENDIAN);
offset += 3; /* skip RFU and header len */
/* Header length, varies for SYN(identification) and EAKs */
proto_tree_add_uint(cattp_tree, hf_cattp_hlen, tvb, offset, 1, hlen);
offset += 1;
/* Parse cattp source port. */
sport = tvb_get_ntohs(tvb,offset);
proto_tree_add_uint(cattp_tree, hf_cattp_srcport, tvb, offset, 2, sport);
offset += 2;
/* Parse cattp destination port. */
dport = tvb_get_ntohs(tvb,offset);
proto_tree_add_uint(cattp_tree, hf_cattp_dstport, tvb, offset, 2, dport);
offset += 2;
proto_item_append_text(ti, " (v%u, Src Port: %u, Dst Port: %u)", ver, sport, dport);
col_add_fstr(pinfo->cinfo, COL_INFO, "%u > %u ", sport, dport);
/* Parse length of payload. */
plen = tvb_get_ntohs(tvb,offset);
proto_tree_add_uint(cattp_tree, hf_cattp_datalen, tvb, offset, 2, plen);
offset += 2;
/* Parse sequence number. */
seqno = tvb_get_ntohs(tvb,offset);
proto_tree_add_uint(cattp_tree, hf_cattp_seq, tvb, offset, 2, seqno);
offset += 2;
/* Parse acknowledgement number. */
ackno = tvb_get_ntohs(tvb,offset);
proto_tree_add_uint(cattp_tree, hf_cattp_ack, tvb, offset, 2, ackno);
offset += 2;
/* Parse window size. */
wsize = tvb_get_ntohs(tvb,offset);
proto_tree_add_uint(cattp_tree, hf_cattp_windowsize, tvb, offset, 2, wsize);
offset += 2;
if (flags & F_SYN)
pdutype = "[SYN PDU]";
else if (flags & F_ACK)
pdutype = "[ACK PDU]";
else if (flags & F_RST)
pdutype = "[RST PDU]";
col_append_fstr(pinfo->cinfo,COL_INFO,"%s Flags=0x%02X Ack=%u Seq=%u WSize=%u",pdutype,flags,ackno,seqno,wsize);
/* Parse and verify checksum */
header_offset = 0;
cksum_data_len = hlen + plen;
chksum = tvb_get_ntohs(tvb,offset);
if (!cattp_check_checksum) {
/* We have turned checksum checking off; we do NOT checksum it. */
proto_tree_add_uint_format_value(cattp_tree, hf_cattp_checksum, tvb, offset, 2,
chksum,"0x%X [validation disabled]", chksum);
} else {
/* We haven't turned checksum checking off; checksum it. */
/* Unlike TCP, CATTP does not make use of a pseudo-header for checksum */
SET_CKSUM_VEC_TVB(cksum_vec[0], tvb, header_offset, cksum_data_len);
computed_chksum = in_cksum(cksum_vec, 1);
if (computed_chksum == 0) {
/* Checksum is valid */
proto_tree_add_uint_format_value(cattp_tree, hf_cattp_checksum, tvb, offset, 2,
chksum,"0x%X [validated]", chksum);
} else {
/* Checksum is invalid. Let's compute the expected checksum, based on the data we have */
proto_tree_add_uint_format_value(cattp_tree, hf_cattp_checksum, tvb, offset, 2, chksum,
"0x%X [incorrect, correct: 0x%X]", chksum,
in_cksum_shouldbe(chksum,computed_chksum));
}
} /* End of checksum code */
offset += 2;
if (flags & F_SYN)
offset = dissect_cattp_synpdu(tvb,pinfo,cattp_tree,offset);
else if (flags & F_EAK)
offset = dissect_cattp_eakpdu(tvb, pinfo, cattp_tree, offset, hlen);
else if (flags & F_RST)
offset = dissect_cattp_rstpdu(tvb, pinfo, cattp_tree, offset);
/* for other PDU types nothing special to be displayed in detail tree. */
if (plen > 0) { /* Call generic data handle if data exists. */
col_append_fstr(pinfo->cinfo,COL_INFO," DataLen=%u",plen);
tvb = tvb_new_subset_remaining(tvb, offset);
call_dissector(data_handle,tvb, pinfo, tree);
}
}
/* The heuristic dissector function checks if the UDP packet may be a cattp packet */
static gboolean
dissect_cattp_heur(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
if (tvb_captured_length(tvb) >= CATTP_HBLEN) { /* check of data is big enough for base header. */
guint8 flags, hlen;
guint16 plen;
hlen = tvb_get_guint8(tvb,3); /* header len */
plen = tvb_get_ntohs(tvb,8); /* payload len */
if (hlen+plen != tvb_reported_length(tvb)) /* check if data length is ok. */
return FALSE;
flags = tvb_get_guint8(tvb,0) & M_FLAGS;
if ( (flags & M_PDU_SYN) == F_SYN ||
(flags & M_PDU_RST) == F_RST ||
(flags & M_PDU_ACK) == F_ACK ) { /* check if flag combi is valid */
dissect_cattp(tvb,pinfo,tree);
return TRUE;
}
}
return FALSE;
}
/* Function to register the dissector, called by plugin infrastructure. */
void
proto_register_cattp(void)
{
static hf_register_info hf[] = {
{
&hf_cattp_flags,
{
"Flags","cattp.flags", FT_UINT8, BASE_HEX, NULL, 0x0,
NULL, HFILL
}
},
{
&hf_cattp_flag_syn,
{
"Synchronize Flag","cattp.flags.syn", FT_UINT8, BASE_DEC, NULL, F_SYN,
NULL, HFILL
}
},
{
&hf_cattp_flag_ack,
{
"Acknowledge Flag","cattp.flags.ack", FT_UINT8, BASE_DEC, NULL, F_ACK,
NULL, HFILL
}
},
{
&hf_cattp_flag_eak,
{
"Extended Acknowledge Flag","cattp.flags.eak", FT_UINT8, BASE_DEC, NULL, F_EAK,
NULL, HFILL
}
},
{
&hf_cattp_flag_rst,
{
"Reset Flag","cattp.flags.rst", FT_UINT8, BASE_DEC, NULL, F_RST,
NULL, HFILL
}
},
{
&hf_cattp_flag_nul,
{
"NULL Flag","cattp.flags.nul", FT_UINT8, BASE_DEC, NULL, F_NUL,
NULL, HFILL
}
},
{
&hf_cattp_flag_seg,
{
"Segmentation Flag","cattp.flags.seg", FT_UINT8, BASE_DEC, NULL, F_SEG,
NULL, HFILL
}
},
{
&hf_cattp_version,
{
"Version","cattp.version", FT_UINT8, BASE_HEX, NULL, M_VERSION,
NULL, HFILL
}
},
{
&hf_cattp_hlen,
{
"Header Length","cattp.hlen", FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL
}
},
{
&hf_cattp_srcport,
{
"Source Port","cattp.srcport", FT_UINT16, BASE_DEC, NULL, 0x0,
NULL, HFILL
}
},
{
&hf_cattp_dstport,
{
"Destination Port","cattp.dstport", FT_UINT16, BASE_DEC, NULL, 0x0,
NULL, HFILL
}
},
{
&hf_cattp_datalen,
{
"Data Length","cattp.datalen", FT_UINT16, BASE_DEC, NULL, 0x0,
NULL, HFILL
}
},
{
&hf_cattp_seq,
{
"Sequence Number","cattp.seq", FT_UINT16, BASE_DEC, NULL, 0x0,
NULL, HFILL
}
},
{
&hf_cattp_ack,
{
"Acknowledgement Number","cattp.ack", FT_UINT16, BASE_DEC, NULL, 0x0,
NULL, HFILL
}
},
{
&hf_cattp_windowsize,
{
"Window Size","cattp.windowsize", FT_UINT16, BASE_DEC, NULL, 0x0,
NULL, HFILL
}
},
{
&hf_cattp_checksum,
{
"Checksum","cattp.checksum", FT_UINT16, BASE_HEX, NULL, 0x0,
NULL, HFILL
}
},
{
&hf_cattp_identification,
{
"Identification","cattp.identification", FT_BYTES, BASE_NONE, NULL, 0x0,
NULL, HFILL
}
},
{
&hf_cattp_iccid,
{
"ICCID","cattp.iccid", FT_STRING, BASE_NONE, NULL, 0x0,
NULL, HFILL
}
},
{
&hf_cattp_maxpdu,
{
"Maxpdu","cattp.maxpdu", FT_UINT16, BASE_DEC, NULL, 0x0,
NULL, HFILL
}
},
{
&hf_cattp_maxsdu,
{
"Maxsdu","cattp.maxsdu", FT_UINT16, BASE_DEC, NULL, 0x0,
NULL, HFILL
}
},
{
&hf_cattp_rc,
{
"Reason Code","cattp.rc", FT_UINT8, BASE_DEC, VALS(cattp_reset_reason), 0x0,
NULL, HFILL
}
},
{
&hf_cattp_idlen,
{
"Identification Length","cattp.idlen", FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL
}
},
{
&hf_cattp_eaks,
{
"Acknowledgement Number","cattp.eak", FT_UINT16, BASE_DEC, NULL, 0x0,
NULL, HFILL
}
},
{
&hf_cattp_eaklen,
{
"Extended Acknowledgement Numbers","cattp.eaks", FT_UINT16, BASE_DEC, NULL, 0x0,
NULL, HFILL
}
}
};
/* Setup protocol subtree array */
static gint *ett[] = {
&ett_cattp,
&ett_cattp_flags,
&ett_cattp_id,
&ett_cattp_eaks
};
module_t *cattp_module;
proto_cattp = proto_register_protocol (
"ETSI Card Application Toolkit Transport Protocol", /* name */
CATTP_SHORTNAME, /* short name */
"cattp" /* abbrev */
);
proto_register_field_array(proto_cattp, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
cattp_module = prefs_register_protocol(proto_cattp, proto_reg_handoff_cattp);
prefs_register_bool_preference(cattp_module, "checksum",
"Validate checksum of all messages",
"Whether the checksum of all messages should be validated or not",
&cattp_check_checksum);
prefs_register_bool_preference(cattp_module, "enable",
"Enable " CATTP_SHORTNAME " heuristic dissection",
"Enable " CATTP_SHORTNAME " heuristic dissection (default is enabled)",
&cattp_enable_heuristic_dissection);
}
/* Handoff */
void
proto_reg_handoff_cattp(void)
{
static gboolean initialized = FALSE;
if (!initialized) {
/* Create dissector handle */
cattp_handle = create_dissector_handle(dissect_cattp, proto_cattp);
/* find data handle */
data_handle = find_dissector("data");
heur_dissector_add("udp",dissect_cattp_heur,proto_cattp);
dissector_add_for_decode_as("udp.port", cattp_handle);
initialized = TRUE;
}
heur_dissector_set_enabled("udp",dissect_cattp_heur,proto_cattp,
cattp_enable_heuristic_dissection);
}
/*
* Editor modelines - https://www.wireshark.org/tools/modelines.html
*
* Local variables:
* c-basic-offset: 4
* tab-width: 4
* indent-tabs-mode: t
* End:
*
* vi: set shiftwidth=4 tabstop=4 expandtab:
* :indentSize=4:tabSize=4:noTabs=true:
*/