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wireshark/epan/dissectors/packet-nasdaq-soup.c

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/* packet-nasdaq-soup.c
* Routines for NASDAQ SOUP 2.0 Protocol dissection
* Copyright 2007,2008 Didier Gautheron <dgautheron@magic.fr>
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*
* Documentation: http://www.nasdaqtrader.com/Trader.aspx?id=DPSpecs
* ex:
* http://www.nasdaqtrader.com/content/technicalsupport/specifications/dataproducts/souptcp.pdf
*/
#include "config.h"
#include <epan/packet.h>
#include <epan/prefs.h>
void proto_register_nasdaq_soup(void);
void proto_reg_handoff_nasdaq_soup(void);
static const value_string message_types_val[] = {
{ 'S', "Sequenced Data" },
{ 'R', "Client Heartbeat" },
{ 'H', "Server Heartbeat" },
{ '+' , "Debug Packet" },
{ 'A', "Login Accepted" },
{ 'J', "Login Rejected" },
{ 'L', "Login Request" },
{ 'U', "Unsequenced Data" },
{ 'O', "Logout Request" },
{ 0, NULL }
};
static const value_string reject_code_val[] = {
{ 'A', "Not authorized" },
{ 'S', "Session not available" },
{ 0, NULL }
};
/* Initialize the protocol and registered fields */
static int proto_nasdaq_soup = -1;
static dissector_handle_t nasdaq_soup_handle;
static dissector_handle_t nasdaq_itch_handle;
/* desegmentation of Nasdaq Soup */
static gboolean nasdaq_soup_desegment = TRUE;
/* Initialize the subtree pointers */
static gint ett_nasdaq_soup = -1;
static int hf_nasdaq_soup_packet_type = -1;
static int hf_nasdaq_soup_message = -1;
static int hf_nasdaq_soup_text = -1;
static int hf_nasdaq_soup_packet_eol = -1;
static int hf_nasdaq_soup_username = -1;
static int hf_nasdaq_soup_password = -1;
static int hf_nasdaq_soup_session = -1;
static int hf_nasdaq_soup_seq_number = -1;
static int hf_nasdaq_soup_reject_code = -1;
static void
dissect_nasdaq_soup_packet(tvbuff_t *tvb, packet_info *pinfo, proto_tree *parent_tree, proto_tree *tree, int offset, int linelen)
{
guint8 nasdaq_soup_type;
tvbuff_t *new_tvb = NULL;
nasdaq_soup_type = tvb_get_guint8(tvb, offset);
proto_tree_add_item(tree, hf_nasdaq_soup_packet_type, tvb, offset, 1, ENC_ASCII|ENC_NA);
offset++;
switch (nasdaq_soup_type) {
case '+': /* debug msg */
proto_tree_add_item(tree, hf_nasdaq_soup_text, tvb, offset, linelen -1, ENC_ASCII);
offset += linelen -1;
break;
case 'A': /* login accept */
proto_tree_add_item(tree, hf_nasdaq_soup_session, tvb, offset, 10, ENC_ASCII);
offset += 10;
proto_tree_add_item(tree, hf_nasdaq_soup_seq_number, tvb, offset, 10, ENC_ASCII);
offset += 10;
break;
case 'J': /* login reject */
proto_tree_add_item(tree, hf_nasdaq_soup_reject_code, tvb, offset, 1, ENC_ASCII|ENC_NA);
offset++;
break;
case 'U': /* unsequenced data packed */
case 'S': /* sequenced data packed */
if (linelen > 1 && nasdaq_itch_handle) {
new_tvb = tvb_new_subset_length(tvb, offset,linelen -1);
} else {
proto_tree_add_item(tree, hf_nasdaq_soup_message, tvb, offset, linelen -1, ENC_ASCII);
}
offset += linelen -1;
break;
case 'L': /* login request */
proto_tree_add_item(tree, hf_nasdaq_soup_username, tvb, offset, 6, ENC_ASCII);
offset += 6;
proto_tree_add_item(tree, hf_nasdaq_soup_password, tvb, offset, 10, ENC_ASCII);
offset += 10;
proto_tree_add_item(tree, hf_nasdaq_soup_session, tvb, offset, 10, ENC_ASCII);
offset += 10;
proto_tree_add_item(tree, hf_nasdaq_soup_seq_number, tvb, offset, 10, ENC_ASCII);
offset += 10;
break;
case 'H': /* server heartbeat */
case 'O': /* logout request */
case 'R': /* client heartbeat */
/* no payload */
break;
default:
/* unknown */
proto_tree_add_item(tree, hf_nasdaq_soup_message, tvb, offset, linelen -1, ENC_ASCII);
offset += linelen -1;
break;
}
proto_tree_add_item(tree, hf_nasdaq_soup_packet_eol, tvb, offset, 1, ENC_ASCII);
if (new_tvb) {
call_dissector(nasdaq_itch_handle, new_tvb, pinfo, parent_tree);
}
return;
}
/* ---------------------------- */
static int
dissect_nasdaq_soup(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
proto_item *ti;
proto_tree *nasdaq_soup_tree = NULL;
guint8 nasdaq_soup_type;
int linelen;
gint next_offset;
int offset = 0;
gint counter = 0;
while (tvb_offset_exists(tvb, offset)) {
/* there's only a \n no \r */
linelen = tvb_find_line_end(tvb, offset, -1, &next_offset, nasdaq_soup_desegment && pinfo->can_desegment);
if (linelen == -1) {
/*
* We didn't find a line ending, and we're doing desegmentation;
* tell the TCP dissector where the data for this message starts
* in the data it handed us, and tell it we need one more byte
* (we may need more, but we'll try again if what we get next
* isn't enough), and return.
*/
pinfo->desegment_offset = offset;
pinfo->desegment_len = DESEGMENT_ONE_MORE_SEGMENT;
return tvb_captured_length(tvb);
}
nasdaq_soup_type = tvb_get_guint8(tvb, offset);
if (counter == 0) {
col_set_str(pinfo->cinfo, COL_PROTOCOL, "Nasdaq-SOUP");
col_clear(pinfo->cinfo, COL_INFO);
}
if (counter) {
col_append_str(pinfo->cinfo, COL_INFO, "; ");
col_set_fence(pinfo->cinfo, COL_INFO);
}
col_append_str(pinfo->cinfo, COL_INFO, val_to_str(nasdaq_soup_type, message_types_val, "Unknown packet type (0x%02x)"));
counter++;
ti = proto_tree_add_item(tree, proto_nasdaq_soup, tvb, offset, linelen +1, ENC_NA);
nasdaq_soup_tree = proto_item_add_subtree(ti, ett_nasdaq_soup);
dissect_nasdaq_soup_packet(tvb, pinfo, tree, nasdaq_soup_tree, offset, linelen);
offset = next_offset;
}
return tvb_captured_length(tvb);
}
void
proto_register_nasdaq_soup(void)
{
/* Setup list of header fields See Section 1.6.1 for details*/
static hf_register_info hf[] = {
{ &hf_nasdaq_soup_packet_type,
{ "Packet Type", "nasdaq-soup.packet_type",
FT_CHAR, BASE_HEX, VALS(message_types_val), 0x0,
NULL, HFILL }},
{ &hf_nasdaq_soup_reject_code,
{ "Login Reject Code", "nasdaq-soup.reject_code",
FT_CHAR, BASE_HEX, VALS(reject_code_val), 0x0,
NULL, HFILL }},
{ &hf_nasdaq_soup_message,
{ "Message", "nasdaq-soup.message",
FT_STRING, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
{ &hf_nasdaq_soup_text,
{ "Debug Text", "nasdaq-soup.text",
FT_STRING, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
{ &hf_nasdaq_soup_username,
{ "User Name", "nasdaq-soup.username",
FT_STRING, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
{ &hf_nasdaq_soup_password,
{ "Password", "nasdaq-soup.password",
FT_STRING, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
{ &hf_nasdaq_soup_session,
{ "Session", "nasdaq-soup.session",
FT_STRING, BASE_NONE, NULL, 0x0,
"Session ID", HFILL }},
{ &hf_nasdaq_soup_seq_number,
{ "Sequence number", "nasdaq-soup.seq_number",
FT_STRING, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
{ &hf_nasdaq_soup_packet_eol,
{ "End Of Packet", "nasdaq-soup.packet_eol",
FT_STRING, BASE_NONE, NULL, 0x0,
NULL, HFILL }}
};
/* Setup protocol subtree array */
static gint *ett[] = {
&ett_nasdaq_soup
};
module_t *nasdaq_soup_module;
/* Register the protocol name and description */
proto_nasdaq_soup = proto_register_protocol("Nasdaq-SoupTCP version 2.0","NASDAQ-SOUP", "nasdaq_soup");
/* Required function calls to register the header fields and subtrees used */
proto_register_field_array(proto_nasdaq_soup, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
nasdaq_soup_module = prefs_register_protocol(proto_nasdaq_soup, NULL);
prefs_register_bool_preference(nasdaq_soup_module, "desegment",
"Reassemble Nasdaq-SoupTCP messages spanning multiple TCP segments",
"Whether the Nasdaq-SoupTCP dissector should reassemble messages spanning multiple TCP segments.",
&nasdaq_soup_desegment);
}
/* If this dissector uses sub-dissector registration add a registration routine.
This format is required because a script is used to find these routines and
create the code that calls these routines.
*/
void
proto_reg_handoff_nasdaq_soup(void)
{
nasdaq_soup_handle = create_dissector_handle(dissect_nasdaq_soup, proto_nasdaq_soup);
nasdaq_itch_handle = find_dissector_add_dependency("nasdaq-itch", proto_nasdaq_soup);
dissector_add_uint_range_with_preference("tcp.port", "", nasdaq_soup_handle);
}
/*
* Editor modelines - https://www.wireshark.org/tools/modelines.html
*
* Local variables:
* c-basic-offset: 4
* tab-width: 8
* indent-tabs-mode: nil
* End:
*
* vi: set shiftwidth=4 tabstop=8 expandtab:
* :indentSize=4:tabSize=8:noTabs=true:
*/
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