8efad466c4
Do not require a useless ENC_NA parameter for string encodings.
FT_STRING and FT_STRINGZ types don't have any ndianness.
Follow-up to 6ec429622c
.
282 lines
9.1 KiB
C
282 lines
9.1 KiB
C
/* packet-nasdaq-soup.c
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* Routines for NASDAQ SOUP 2.0 Protocol dissection
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* Copyright 2007,2008 Didier Gautheron <dgautheron@magic.fr>
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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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* SPDX-License-Identifier: GPL-2.0-or-later
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*
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* Documentation: http://www.nasdaqtrader.com/Trader.aspx?id=DPSpecs
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* ex:
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* http://www.nasdaqtrader.com/content/technicalsupport/specifications/dataproducts/souptcp.pdf
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*/
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#include "config.h"
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#include <epan/packet.h>
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#include <epan/prefs.h>
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void proto_register_nasdaq_soup(void);
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void proto_reg_handoff_nasdaq_soup(void);
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static const value_string message_types_val[] = {
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{ 'S', "Sequenced Data" },
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{ 'R', "Client Heartbeat" },
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{ 'H', "Server Heartbeat" },
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{ '+' , "Debug Packet" },
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{ 'A', "Login Accepted" },
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{ 'J', "Login Rejected" },
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{ 'L', "Login Request" },
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{ 'U', "Unsequenced Data" },
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{ 'O', "Logout Request" },
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{ 0, NULL }
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};
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static const value_string reject_code_val[] = {
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{ 'A', "Not authorized" },
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{ 'S', "Session not available" },
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{ 0, NULL }
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};
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/* Initialize the protocol and registered fields */
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static int proto_nasdaq_soup = -1;
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static dissector_handle_t nasdaq_soup_handle;
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static dissector_handle_t nasdaq_itch_handle;
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/* desegmentation of Nasdaq Soup */
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static gboolean nasdaq_soup_desegment = TRUE;
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/* Initialize the subtree pointers */
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static gint ett_nasdaq_soup = -1;
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static int hf_nasdaq_soup_packet_type = -1;
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static int hf_nasdaq_soup_message = -1;
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static int hf_nasdaq_soup_text = -1;
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static int hf_nasdaq_soup_packet_eol = -1;
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static int hf_nasdaq_soup_username = -1;
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static int hf_nasdaq_soup_password = -1;
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static int hf_nasdaq_soup_session = -1;
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static int hf_nasdaq_soup_seq_number = -1;
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static int hf_nasdaq_soup_reject_code = -1;
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static void
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dissect_nasdaq_soup_packet(tvbuff_t *tvb, packet_info *pinfo, proto_tree *parent_tree, proto_tree *tree, int offset, int linelen)
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{
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guint8 nasdaq_soup_type;
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tvbuff_t *new_tvb = NULL;
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nasdaq_soup_type = tvb_get_guint8(tvb, offset);
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proto_tree_add_item(tree, hf_nasdaq_soup_packet_type, tvb, offset, 1, ENC_ASCII|ENC_NA);
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offset++;
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switch (nasdaq_soup_type) {
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case '+': /* debug msg */
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proto_tree_add_item(tree, hf_nasdaq_soup_text, tvb, offset, linelen -1, ENC_ASCII);
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offset += linelen -1;
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break;
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case 'A': /* login accept */
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proto_tree_add_item(tree, hf_nasdaq_soup_session, tvb, offset, 10, ENC_ASCII);
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offset += 10;
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proto_tree_add_item(tree, hf_nasdaq_soup_seq_number, tvb, offset, 10, ENC_ASCII);
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offset += 10;
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break;
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case 'J': /* login reject */
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proto_tree_add_item(tree, hf_nasdaq_soup_reject_code, tvb, offset, 1, ENC_ASCII|ENC_NA);
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offset++;
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break;
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case 'U': /* unsequenced data packed */
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case 'S': /* sequenced data packed */
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if (linelen > 1 && nasdaq_itch_handle) {
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new_tvb = tvb_new_subset_length(tvb, offset,linelen -1);
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} else {
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proto_tree_add_item(tree, hf_nasdaq_soup_message, tvb, offset, linelen -1, ENC_ASCII);
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}
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offset += linelen -1;
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break;
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case 'L': /* login request */
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proto_tree_add_item(tree, hf_nasdaq_soup_username, tvb, offset, 6, ENC_ASCII);
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offset += 6;
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proto_tree_add_item(tree, hf_nasdaq_soup_password, tvb, offset, 10, ENC_ASCII);
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offset += 10;
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proto_tree_add_item(tree, hf_nasdaq_soup_session, tvb, offset, 10, ENC_ASCII);
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offset += 10;
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proto_tree_add_item(tree, hf_nasdaq_soup_seq_number, tvb, offset, 10, ENC_ASCII);
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offset += 10;
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break;
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case 'H': /* server heartbeat */
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case 'O': /* logout request */
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case 'R': /* client heartbeat */
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/* no payload */
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break;
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default:
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/* unknown */
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proto_tree_add_item(tree, hf_nasdaq_soup_message, tvb, offset, linelen -1, ENC_ASCII);
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offset += linelen -1;
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break;
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}
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proto_tree_add_item(tree, hf_nasdaq_soup_packet_eol, tvb, offset, 1, ENC_ASCII);
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if (new_tvb) {
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call_dissector(nasdaq_itch_handle, new_tvb, pinfo, parent_tree);
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}
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return;
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}
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/* ---------------------------- */
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static int
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dissect_nasdaq_soup(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
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{
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proto_item *ti;
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proto_tree *nasdaq_soup_tree = NULL;
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guint8 nasdaq_soup_type;
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int linelen;
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gint next_offset;
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int offset = 0;
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gint counter = 0;
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while (tvb_offset_exists(tvb, offset)) {
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/* there's only a \n no \r */
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linelen = tvb_find_line_end(tvb, offset, -1, &next_offset, nasdaq_soup_desegment && pinfo->can_desegment);
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if (linelen == -1) {
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/*
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* We didn't find a line ending, and we're doing desegmentation;
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* tell the TCP dissector where the data for this message starts
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* in the data it handed us, and tell it we need one more byte
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* (we may need more, but we'll try again if what we get next
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* isn't enough), and return.
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*/
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pinfo->desegment_offset = offset;
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pinfo->desegment_len = DESEGMENT_ONE_MORE_SEGMENT;
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return tvb_captured_length(tvb);
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}
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nasdaq_soup_type = tvb_get_guint8(tvb, offset);
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if (counter == 0) {
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "Nasdaq-SOUP");
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col_clear(pinfo->cinfo, COL_INFO);
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}
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if (counter) {
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col_append_str(pinfo->cinfo, COL_INFO, "; ");
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col_set_fence(pinfo->cinfo, COL_INFO);
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}
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col_append_str(pinfo->cinfo, COL_INFO, val_to_str(nasdaq_soup_type, message_types_val, "Unknown packet type (0x%02x)"));
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counter++;
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ti = proto_tree_add_item(tree, proto_nasdaq_soup, tvb, offset, linelen +1, ENC_NA);
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nasdaq_soup_tree = proto_item_add_subtree(ti, ett_nasdaq_soup);
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dissect_nasdaq_soup_packet(tvb, pinfo, tree, nasdaq_soup_tree, offset, linelen);
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offset = next_offset;
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}
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return tvb_captured_length(tvb);
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}
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void
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proto_register_nasdaq_soup(void)
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{
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/* Setup list of header fields See Section 1.6.1 for details*/
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static hf_register_info hf[] = {
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{ &hf_nasdaq_soup_packet_type,
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{ "Packet Type", "nasdaq-soup.packet_type",
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FT_CHAR, BASE_HEX, VALS(message_types_val), 0x0,
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NULL, HFILL }},
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{ &hf_nasdaq_soup_reject_code,
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{ "Login Reject Code", "nasdaq-soup.reject_code",
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FT_CHAR, BASE_HEX, VALS(reject_code_val), 0x0,
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NULL, HFILL }},
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{ &hf_nasdaq_soup_message,
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{ "Message", "nasdaq-soup.message",
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FT_STRING, BASE_NONE, NULL, 0x0,
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NULL, HFILL }},
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{ &hf_nasdaq_soup_text,
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{ "Debug Text", "nasdaq-soup.text",
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FT_STRING, BASE_NONE, NULL, 0x0,
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NULL, HFILL }},
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{ &hf_nasdaq_soup_username,
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{ "User Name", "nasdaq-soup.username",
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FT_STRING, BASE_NONE, NULL, 0x0,
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NULL, HFILL }},
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{ &hf_nasdaq_soup_password,
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{ "Password", "nasdaq-soup.password",
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FT_STRING, BASE_NONE, NULL, 0x0,
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NULL, HFILL }},
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{ &hf_nasdaq_soup_session,
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{ "Session", "nasdaq-soup.session",
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FT_STRING, BASE_NONE, NULL, 0x0,
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"Session ID", HFILL }},
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{ &hf_nasdaq_soup_seq_number,
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{ "Sequence number", "nasdaq-soup.seq_number",
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FT_STRING, BASE_NONE, NULL, 0x0,
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NULL, HFILL }},
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{ &hf_nasdaq_soup_packet_eol,
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{ "End Of Packet", "nasdaq-soup.packet_eol",
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FT_STRING, BASE_NONE, NULL, 0x0,
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NULL, HFILL }}
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};
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/* Setup protocol subtree array */
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static gint *ett[] = {
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&ett_nasdaq_soup
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};
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module_t *nasdaq_soup_module;
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/* Register the protocol name and description */
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proto_nasdaq_soup = proto_register_protocol("Nasdaq-SoupTCP version 2.0","NASDAQ-SOUP", "nasdaq_soup");
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/* Required function calls to register the header fields and subtrees used */
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proto_register_field_array(proto_nasdaq_soup, hf, array_length(hf));
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proto_register_subtree_array(ett, array_length(ett));
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nasdaq_soup_module = prefs_register_protocol(proto_nasdaq_soup, NULL);
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prefs_register_bool_preference(nasdaq_soup_module, "desegment",
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"Reassemble Nasdaq-SoupTCP messages spanning multiple TCP segments",
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"Whether the Nasdaq-SoupTCP dissector should reassemble messages spanning multiple TCP segments.",
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&nasdaq_soup_desegment);
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}
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/* If this dissector uses sub-dissector registration add a registration routine.
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This format is required because a script is used to find these routines and
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create the code that calls these routines.
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*/
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void
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proto_reg_handoff_nasdaq_soup(void)
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{
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nasdaq_soup_handle = create_dissector_handle(dissect_nasdaq_soup, proto_nasdaq_soup);
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nasdaq_itch_handle = find_dissector_add_dependency("nasdaq-itch", proto_nasdaq_soup);
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dissector_add_uint_range_with_preference("tcp.port", "", nasdaq_soup_handle);
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}
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/*
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* Editor modelines - https://www.wireshark.org/tools/modelines.html
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*
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* Local variables:
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* c-basic-offset: 4
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* tab-width: 8
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* indent-tabs-mode: nil
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* End:
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*
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* vi: set shiftwidth=4 tabstop=8 expandtab:
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* :indentSize=4:tabSize=8:noTabs=true:
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*/
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