+++ /dev/null
-/* packet-pn-rt.c
- * Routines for pn-rt (PROFINET Real-Time) packet dissection.
- * This is the base for other PROFINET protocols like IO, CBA, DCP, ...
- * (the "content subdissectors" will register themselves using a heuristic)
- *
- * $Id$
- *
- * Wireshark - Network traffic analyzer
- * By Gerald Combs <gerald@wireshark.org>
- * Copyright 1999 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- */
-
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
-
-#ifdef HAVE_SYS_TYPES_H
-# include <sys/types.h>
-#endif
-
-#ifdef HAVE_NETINET_IN_H
-#include <netinet/in.h>
-#endif
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <gmodule.h>
-#include <ctype.h>
-#include <time.h>
-#include <string.h>
-#include <epan/packet.h>
-#include <epan/addr_resolv.h>
-#include "prefs.h"
-#include <epan/strutil.h>
-#include <etypes.h>
-
-void proto_reg_handoff_pn_rt(void);
-
-/* Define the pn-rt proto */
-static int proto_pn_rt = -1;
-
-/* Define many header fields for pn-rt */
-static int hf_pn_rt_id = -1;
-static int hf_pn_rt_data = -1;
-static int hf_pn_rt_cycle_counter = -1;
-static int hf_pn_rt_transfer_status = -1;
-static int hf_pn_rt_data_status = -1;
-static int hf_pn_rt_data_status_res67 = -1;
-static int hf_pn_rt_data_status_ok = -1;
-static int hf_pn_rt_data_status_operate = -1;
-static int hf_pn_rt_data_status_res3 = -1;
-static int hf_pn_rt_data_status_valid = -1;
-static int hf_pn_rt_data_status_res1 = -1;
-static int hf_pn_rt_data_status_primary = -1;
-static int hf_pn_rt_malformed = -1;
-
-/*
- * Define the trees for pn-rt
- * We need one tree for pn-rt itself and one for the pn-rt data status subtree
- */
-static int ett_pn_rt = -1;
-static int ett_pn_rt_data_status = -1;
-
-/*
- * Here are the global variables associated with
- * the various user definable characteristics of the dissection
- */
-/* Place summary in proto tree */
-static gboolean pn_rt_summary_in_tree = TRUE;
-
-/* heuristic to find the right pn-rt payload dissector */
-static heur_dissector_list_t heur_subdissector_list;
-
-/* the official "we don't know that data" dissector */
-static dissector_handle_t data_handle;
-
-
-/*
- * dissect_pn_rt - The dissector for the Soft-Real-Time protocol
- */
-static void
-dissect_pn_rt(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
-{
- gint tvb_len;
- gint data_len;
- guint16 u16FrameID;
- guint8 u8DataStatus;
- guint8 u8TransferStatus;
- guint16 u16CycleCounter;
- const gchar *pszProtAddInfo;
- const gchar *pszProtShort;
- const gchar *pszProtSummary;
- const gchar *pszProtComment;
- proto_item *item = NULL;
- proto_tree *ds_tree = NULL;
- proto_tree *pn_rt_tree, *ti;
- gchar szFieldSummary[100];
- tvbuff_t *next_tvb;
- gboolean bCyclic;
-
-
- /* Initialize variables */
- tvb_len = tvb_length(tvb) -
- /* subtract (optional) Ethernet FCS or trailer len */
- ((pinfo->pseudo_header->eth.fcs_len != -1) ? pinfo->pseudo_header->eth.fcs_len : 0);
- tvb_set_reported_length(tvb, tvb_len);
- pn_rt_tree = NULL;
- ds_tree = NULL;
- ti = NULL;
-
- /*
- * Set the columns now, so that they'll be set correctly if we throw
- * an exception. We can set them (or append things) later again ....
- */
- if (check_col(pinfo->cinfo, COL_PROTOCOL))
- col_add_str(pinfo->cinfo, COL_PROTOCOL, "PN-RT");
- if (check_col(pinfo->cinfo, COL_INFO))
- col_add_str(pinfo->cinfo, COL_INFO, "PROFINET Real-Time");
-
- if (tvb_len < 6) {
- /* packet is too short, mark it as malformed */
- proto_tree_add_bytes(tree, hf_pn_rt_malformed, tvb, 0, 10000,
- tvb_get_ptr(tvb, 0, 10000));
- return;
- }
-
-
- /* build some "raw" data */
- u16FrameID = tvb_get_ntohs(tvb, 0);
- if (u16FrameID < 0x0040) {
- pszProtShort = "PN-PTCP";
- pszProtAddInfo = "Synchronization, ";
- pszProtSummary = "acyclic Real-Time";
- pszProtComment = "0x0000-0x003F: Acyclic Real-Time: Sync";
- bCyclic = FALSE;
- } else if (u16FrameID < 0x0080) {
- pszProtShort = "PN-RT";
- pszProtAddInfo = "reserved, ";
- pszProtSummary = "Real-Time";
- pszProtComment = "0x0040-0x007F: Reserved ID";
- bCyclic = FALSE;
- } else if (u16FrameID < 0x0100) {
- pszProtShort = "PN-RTC0";
- pszProtAddInfo = "Synchronization, ";
- pszProtSummary = "Isochronous-Real-Time";
- pszProtComment = "0x0080-0x00FF: Isochronous-Real-Time: Clock-sync";
- bCyclic = TRUE;
- } else if (u16FrameID < 0x8000){
- pszProtShort = "PN-RTC3";
- pszProtAddInfo = "RTC3, ";
- pszProtSummary = "Isochronous-Real-Time";
- pszProtComment = "0x0100-0x7FFF: Isochronous-Real-Time(class=3): Cyclic";
- bCyclic = TRUE;
- } else if (u16FrameID < 0xbf00){
- pszProtShort = "PN-RTC2";
- pszProtAddInfo = "RTC2, ";
- pszProtSummary = "cyclic Real-Time";
- pszProtComment = "0x8000-0xBEFF: Real-Time(class=2): Cyclic";
- bCyclic = TRUE;
- } else if (u16FrameID < 0xc000){
- pszProtShort = "PN-RTC2";
- pszProtAddInfo = "Multicast, ";
- pszProtSummary = "cyclic Real-Time";
- pszProtComment = "0xBF00-0xBFFF: Real-Time(class=2 multicast): Cyclic";
- bCyclic = TRUE;
- } else if (u16FrameID < 0xfb00){
- pszProtShort = "PN-RTC1";
- pszProtAddInfo = "RTC1, ";
- pszProtSummary = "cyclic Real-Time";
- pszProtComment = "0xC000-0xFAFF: Real-Time(class=1): Cyclic";
- bCyclic = TRUE;
- } else if (u16FrameID < 0xfc00){
- pszProtShort = "PN-RTC1";
- pszProtAddInfo = "Multicast, ";
- pszProtSummary = "cyclic Real-Time";
- pszProtComment = "0xFB00-0xFBFF: Real-Time(class=1 multicast): Cyclic";
- bCyclic = TRUE;
- } else if (u16FrameID < 0xfe00){
- pszProtShort = "PN-RTA";
- pszProtAddInfo = "Reserved, ";
- pszProtSummary = "acyclic Real-Time";
- pszProtComment = "0xFC00-0xFDFF: Real-Time: Acyclic high priority";
- bCyclic = FALSE;
- if (u16FrameID == 0xfc01) {
- pszProtShort = "PN-RTA";
- pszProtAddInfo = "Alarm High, ";
- pszProtSummary = "acyclic Real-Time";
- pszProtComment = "Real-Time: Acyclic PN-IO Alarm high priority";
- }
- } else if (u16FrameID < 0xff00){
- pszProtShort = "PN-RTA";
- pszProtAddInfo = "Reserved, ";
- pszProtSummary = "acyclic Real-Time";
- pszProtComment = "0xFE00-0xFEFF: Real-Time: Acyclic low priority";
- bCyclic = FALSE;
- if (u16FrameID == 0xfe01) {
- pszProtShort = "PN-RTA";
- pszProtAddInfo = "Alarm Low, ";
- pszProtSummary = "acyclic Real-Time";
- pszProtComment = "Real-Time: Acyclic PN-IO Alarm low priority";
- }
- if (u16FrameID == 0xfefd) {
- pszProtShort = "PN-RTA";
- pszProtAddInfo = "";
- pszProtSummary = "acyclic Real-Time";
- pszProtComment = "Real-Time: DCP (Dynamic Configuration Protocol)";
- }
- if (u16FrameID == 0xfefe) {
- pszProtShort = "PN-RTA";
- pszProtAddInfo = "";
- pszProtSummary = "acyclic Real-Time";
- pszProtComment = "Real-Time: DCP (Dynamic Configuration Protocol) identify multicast request";
- }
- if (u16FrameID == 0xfeff) {
- pszProtShort = "PN-RTA";
- pszProtAddInfo = "";
- pszProtSummary = "acyclic Real-Time";
- pszProtComment = "Real-Time: DCP (Dynamic Configuration Protocol) identify response";
- }
- } else if (u16FrameID < 0xff20){
- pszProtShort = "PN-PTCP";
- pszProtAddInfo = "RTA Sync, ";
- pszProtSummary = "acyclic Real-Time";
- pszProtComment = "0xFF00-0xFF1F: Acyclic Real-Time: RTA sync";
- bCyclic = FALSE;
- } else if (u16FrameID < 0xff40){
- pszProtShort = "PN-PTCP";
- pszProtAddInfo = "Follow Up, ";
- pszProtSummary = "acyclic Real-Time";
- pszProtComment = "0xFF20-0xFF3F: Acyclic Real-Time: Follow Up";
- bCyclic = FALSE;
- } else if (u16FrameID < 0xff43){
- pszProtShort = "PN-PTCP";
- pszProtAddInfo = "Delay, ";
- pszProtSummary = "acyclic Real-Time";
- pszProtComment = "0xFF40-0xFF42: Acyclic Real-Time: Delay";
- bCyclic = FALSE;
- } else {
- pszProtShort = "PN-RT";
- pszProtAddInfo = "Reserved, ";
- pszProtSummary = "Real-Time";
- pszProtComment = "0xFF43-0xFFFF: reserved ID";
- bCyclic = FALSE;
- }
-
- /* decode optional cyclic fields at the packet end and build the summary line */
- if (bCyclic) {
- /* cyclic transfer has cycle counter, data status and transfer status fields at the end */
- u16CycleCounter = tvb_get_ntohs(tvb, tvb_len - 4);
- u8DataStatus = tvb_get_guint8(tvb, tvb_len - 2);
- u8TransferStatus = tvb_get_guint8(tvb, tvb_len - 1);
-
- g_snprintf (szFieldSummary, sizeof(szFieldSummary),
- "%sID:0x%04x, Len:%4u, Cycle:%5u (%s,%s,%s,%s)",
- pszProtAddInfo, u16FrameID, tvb_len - 2 - 4, u16CycleCounter,
- (u8DataStatus & 0x04) ? "Valid" : "Invalid",
- (u8DataStatus & 0x01) ? "Primary" : "Backup",
- (u8DataStatus & 0x20) ? "Ok" : "Problem",
- (u8DataStatus & 0x10) ? "Run" : "Stop");
-
- /* user data length is packet len - frame id - optional cyclic status fields */
- data_len = tvb_len - 2 - 4;
- } else {
- /* satisfy the gcc compiler, so it won't throw an "uninitialized" warning */
- u16CycleCounter = 0;
- u8DataStatus = 0;
- u8TransferStatus = 0;
-
- /* acyclic transfer has no fields at the end */
- g_snprintf (szFieldSummary, sizeof(szFieldSummary),
- "%sID:0x%04x, Len:%4u",
- pszProtAddInfo, u16FrameID, tvb_len - 2);
-
- /* user data length is packet len - frame id field */
- data_len = tvb_len - 2;
- }
-
- /* build protocol tree only, if tree is really used */
- if (tree) {
- /* build pn_rt protocol tree with summary line */
- if (pn_rt_summary_in_tree) {
- ti = proto_tree_add_protocol_format(tree, proto_pn_rt, tvb, 0, tvb_len,
- "PROFINET %s, %s", pszProtSummary, szFieldSummary);
- } else {
- ti = proto_tree_add_item(tree, proto_pn_rt, tvb, 0, tvb_len, FALSE);
- }
- pn_rt_tree = proto_item_add_subtree(ti, ett_pn_rt);
-
- /* add frame ID */
- proto_tree_add_uint_format(pn_rt_tree, hf_pn_rt_id, tvb,
- 0, 2, u16FrameID, "FrameID: 0x%04x (%s)", u16FrameID, pszProtComment);
-
- if (bCyclic) {
- /* add cycle counter */
- proto_tree_add_uint_format(pn_rt_tree, hf_pn_rt_cycle_counter, tvb,
- tvb_len - 4, 2, u16CycleCounter, "CycleCounter: %u", u16CycleCounter);
-
- /* add data status subtree */
- item = proto_tree_add_uint_format(pn_rt_tree, hf_pn_rt_data_status,
- tvb, tvb_len - 2, 1, u8DataStatus,
- "DataStatus: 0x%02x (Frame: %s and %s, Provider: %s and %s)",
- u8DataStatus,
- (u8DataStatus & 0x04) ? "Valid" : "Invalid",
- (u8DataStatus & 0x01) ? "Primary" : "Backup",
- (u8DataStatus & 0x20) ? "Ok" : "Problem",
- (u8DataStatus & 0x10) ? "Run" : "Stop");
- ds_tree = proto_item_add_subtree(item, ett_pn_rt_data_status);
- proto_tree_add_uint(ds_tree, hf_pn_rt_data_status_res67, tvb, tvb_len - 2, 1, u8DataStatus);
- proto_tree_add_uint(ds_tree, hf_pn_rt_data_status_ok, tvb, tvb_len - 2, 1, u8DataStatus);
- proto_tree_add_uint(ds_tree, hf_pn_rt_data_status_operate, tvb, tvb_len - 2, 1, u8DataStatus);
- proto_tree_add_uint(ds_tree, hf_pn_rt_data_status_res3, tvb, tvb_len - 2, 1, u8DataStatus);
- proto_tree_add_uint(ds_tree, hf_pn_rt_data_status_valid, tvb, tvb_len - 2, 1, u8DataStatus);
- proto_tree_add_uint(ds_tree, hf_pn_rt_data_status_res1, tvb, tvb_len - 2, 1, u8DataStatus);
- proto_tree_add_uint(ds_tree, hf_pn_rt_data_status_primary, tvb, tvb_len - 2, 1, u8DataStatus);
-
- /* add transfer status */
- if (u8TransferStatus) {
- proto_tree_add_uint_format(pn_rt_tree, hf_pn_rt_transfer_status, tvb,
- tvb_len - 1, 1, u8TransferStatus,
- "TransferStatus: 0x%02x (ignore this frame)", u8TransferStatus);
- } else {
- proto_tree_add_uint_format(pn_rt_tree, hf_pn_rt_transfer_status, tvb,
- tvb_len - 1, 1, u8TransferStatus,
- "TransferStatus: 0x%02x (OK)", u8TransferStatus);
- }
- }
- }
-
- /* update column info now */
- if (check_col(pinfo->cinfo, COL_INFO))
- col_add_fstr(pinfo->cinfo, COL_INFO, szFieldSummary);
- if (check_col(pinfo->cinfo, COL_PROTOCOL))
- col_add_str(pinfo->cinfo, COL_PROTOCOL, pszProtShort);
-
- pinfo->private_data = GUINT_TO_POINTER( (guint32) u16FrameID);
-
- /* get frame user data tvb (without header and footer) */
- next_tvb = tvb_new_subset(tvb, 2, data_len, data_len);
-
- /* ask heuristics, if some sub-dissector is interested in this packet payload */
- if(!dissector_try_heuristic(heur_subdissector_list, next_tvb, pinfo, tree)) {
- /*if (check_col(pinfo->cinfo, COL_INFO))
- col_add_fstr(pinfo->cinfo, COL_INFO, "Unknown");*/
-
- /* Oh, well, we don't know this; dissect it as data. */
- call_dissector(data_handle, next_tvb, pinfo, tree);
- }
-}
-
-
-/* Register all the bits needed by the filtering engine */
-void
-proto_register_pn_rt(void)
-{
- static hf_register_info hf[] = {
- { &hf_pn_rt_id,
- { "FrameID", "pn_rt.frame_id", FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL }},
- { &hf_pn_rt_data,
- { "Data", "pn_rt.data", FT_BYTES, BASE_HEX, NULL, 0x0, "", HFILL }},
- { &hf_pn_rt_cycle_counter, {
- "CycleCounter", "pn_rt.cycle_counter", FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL }},
- { &hf_pn_rt_data_status, {
- "DataStatus", "pn_rt.ds", FT_UINT8, BASE_HEX, 0, 0x0, "", HFILL }},
- { &hf_pn_rt_data_status_res67, {
- "Reserved (should be zero)", "pn_rt.ds_res67", FT_UINT8, BASE_HEX, 0, 0xc0, "", HFILL }},
- { &hf_pn_rt_data_status_ok, {
- "StationProblemIndicator (1:Ok/0:Problem)", "pn_rt.ds_ok", FT_UINT8, BASE_HEX, 0, 0x20, "", HFILL }},
- { &hf_pn_rt_data_status_operate, {
- "ProviderState (1:Run/0:Stop)", "pn_rt.ds_operate", FT_UINT8, BASE_HEX, 0, 0x10, "", HFILL }},
- { &hf_pn_rt_data_status_res3, {
- "Reserved (should be zero)", "pn_rt.ds_res3", FT_UINT8, BASE_HEX, 0, 0x08, "", HFILL }},
- { &hf_pn_rt_data_status_valid, {
- "DataValid (1:Valid/0:Invalid)", "pn_rt.ds_valid", FT_UINT8, BASE_HEX, 0, 0x04, "", HFILL }},
- { &hf_pn_rt_data_status_res1, {
- "Reserved (should be zero)", "pn_rt.ds_res1", FT_UINT8, BASE_HEX, 0, 0x02, "", HFILL }},
- { &hf_pn_rt_data_status_primary, {
- "State (1:Primary/0:Backup)", "pn_rt.ds_primary", FT_UINT8, BASE_HEX, 0, 0x01, "", HFILL }},
- { &hf_pn_rt_transfer_status,
- { "TransferStatus", "pn_rt.transfer_status", FT_UINT8, BASE_DEC, NULL, 0x0, "", HFILL }},
- { &hf_pn_rt_malformed,
- { "Malformed", "pn_rt.malformed", FT_BYTES, BASE_HEX, NULL, 0x0, "", HFILL }}
- };
- static gint *ett[] = {
- &ett_pn_rt,
- &ett_pn_rt_data_status,
- };
- module_t *pn_rt_module;
-
- proto_pn_rt = proto_register_protocol("PROFINET Real-Time Protocol",
- "PN-RT", "pn_rt");
-
- proto_register_field_array(proto_pn_rt, hf, array_length(hf));
- proto_register_subtree_array(ett, array_length(ett));
-
- /* Register our configuration options */
-
- pn_rt_module = prefs_register_protocol(proto_pn_rt, proto_reg_handoff_pn_rt);
-
- prefs_register_bool_preference(pn_rt_module, "summary_in_tree",
- "Show PN-RT summary in protocol tree",
- "Whether the PN-RT summary line should be shown in the protocol tree",
- &pn_rt_summary_in_tree);
-
- /* register heuristics anchor for payload dissectors */
- register_heur_dissector_list("pn_rt", &heur_subdissector_list);
-}
-
-
-/* The registration hand-off routine
- * Is called at startup, and everytime the preferences of this protocol changed. */
-void
-proto_reg_handoff_pn_rt(void)
-{
- static int pn_rt_prefs_initialized = FALSE;
- static dissector_handle_t pn_rt_handle;
-
-
- if (!pn_rt_prefs_initialized) {
- pn_rt_handle = create_dissector_handle(dissect_pn_rt, proto_pn_rt);
- pn_rt_prefs_initialized = TRUE;
- }
- else {
- dissector_delete("ethertype", ETHERTYPE_PROFINET, pn_rt_handle);
- }
-
- dissector_add("ethertype", ETHERTYPE_PROFINET, pn_rt_handle);
-
- /* the official "we don't know that data" dissector */
- data_handle = find_dissector("data");
-}
-
git.samba.org / obnox / wireshark / wip.git / blobdiff