--- /dev/null
+/* packet-pdc.c
+ * Routines for PDC dissection
+ * Copyright 2014, Antony Bridle <antony.bridle@nats.co.uk>
+ *
+ * $Id$
+ *
+ * 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 <glib.h>
+#include <config.h>
+#include <epan/prefs.h>
+#include <epan/packet.h>
+#include <epan/dissectors/packet-tcp.h>
+#include <epan/reassemble.h>
+
+/*PDC Protocol*/
+#define PDC_PROCOTOL "PDC"
+
+/* PDC version */
+#define PDC_VERSION 2
+
+#define SIMPDU 1
+#define RSMPDU 2
+#define DRMPDU 3
+#define DTMPDU 4
+#define ADMPDU 5
+#define EDMPDU 6
+#define AKMPDU 8
+
+/*Variable length Parameter Codes*/
+#define PARAM_CODE_VERSION 2
+#define PARAM_CODE_REFERENCES 3
+#define PARAM_CODE_TRANSPORT 4
+
+/* required for the TCP split packet combining */
+#define PDC_MSG_SIZE_FIELD_LENGTH 2 /* minimum amount of data to find out how big the split packet should be when recombined */
+#define FRAME_HEADER_LEN 8
+
+/* global handle for calling asterix decoder if required */
+static dissector_handle_t asterix_handle;
+static int proto_pdc = -1;
+static guint gPREF_PORT_NUM_TCP = 0;
+
+/*HF Declarations*/
+static gint hf_pdc_len = -1;
+static gint hf_pdc_mpdu_code = -1;
+static gint hf_pdc_credit = -1;
+static gint hf_pdc_simpdu_state = -1;
+static gint hf_pdc_yr_admu_nr =-1;
+static gint hf_pdc_akmpdu_mns = -1;
+static gint hf_pdc_akmpdu_cdt = -1;
+static gint hf_pdc_simpdu_var = -1;
+static gint hf_pdc_simpdu_var_len = -1;
+static gint hf_pdc_simpdu_param = -1;
+static gint hf_pdc_simpdu_var_version = -1;
+static gint hf_pdc_simpdu_var_REFSRC = -1;
+static gint hf_pdc_simpdu_var_REFDEST = -1;
+static gint hf_pdc_simpdu_var_TSEL = -1;
+static gint hf_pdc_drmpdu_abort = -1;
+static gint hf_pdc_drmpdu_reason = -1;
+static gint hf_pdc_drmpdu_mode = -1;
+static gint hf_pdc_drmpdu_init = -1;
+static gint hf_pdc_dtmpdu_user_size =-1;
+static gint hf_pdc_admpdu_admpdunr = -1;
+static gint hf_pdc_admpdu_size = -1;
+
+/*Tree Declarations*/
+static gint ett_pdc = -1;
+static gint ett_pdc_simpdu_var = -1;
+
+
+/*Value String Declarations*/
+static const value_string valstr_simpdu_state[] = {
+ { 1, "Operational" },
+ { 2, "Standby" },
+ { 3, "Master" },
+ { 4, "Slave" },
+ { 5, "Single" },
+ { 0, NULL }
+};
+
+static const value_string valstr_simpdu_param[] = {
+ { 2, "Version Number" },
+ { 3, "References" },
+ { 4, "Transport Selector" },
+ { 0, NULL }
+};
+
+static const value_string valstr_mpdus[] = {
+ { 1, "State Information" },
+ { 2, "Request State" },
+ { 3, "Disconnect Request" },
+ { 4, "Data" },
+ { 5, "Acknowledged Data" },
+ { 6, "Expedited Data" },
+ { 8, "Data Acknowledgement" },
+ { 0, NULL }
+};
+
+static const value_string valstr_drmpdu_abort[] = {
+ { 0, "Orderly Release" },
+ { 1, "Abortive Release" },
+ { 0, NULL }
+};
+
+static const value_string valstr_drmpdu_mode[] = {
+ { 0, "Node Shutdown" },
+ { 7, "PDC Release"},
+ { 0, NULL }
+};
+
+static const value_string valstr_drmpdu_initatior[] = {
+ { 0, "Server" },
+ { 15, "Client"},
+ { 0, NULL }
+};
+
+static const value_string valstr_drmpdu_reason[] = {
+ { 0, "Reason Not Specified" },
+ { 1, "Normal Disconnect Initiated by the MS-User" },
+ { 2, "Protocol Error" },
+ { 3, "Connection Request Refused" },
+ { 4, "The Remote Operational MS Entity Does Not Respond" },
+ { 5, "The Protocol Version Is Not Supported" },
+ { 6, "Mismatched References" },
+ { 0, NULL }
+};
+
+/* start of functions here */
+static int dissect_simpdu(tvbuff_t *tvb, proto_tree *tree, guint16 offset, guint8 lenIndicator)
+{
+ guint16 bytesProcessed;
+ guint8 paramCode;
+ proto_item *simpduItem;
+ proto_tree *simpduVarTree;
+ proto_tree *simpduVarTree1;
+
+ bytesProcessed = 0;
+
+ /*Add the Credit allocation*/
+ proto_tree_add_item(tree, hf_pdc_credit, tvb, offset, 1, ENC_BIG_ENDIAN);
+ bytesProcessed++;
+
+ /*Add the State*/
+ proto_tree_add_item(tree, hf_pdc_simpdu_state, tvb, offset + bytesProcessed , 1, ENC_BIG_ENDIAN);
+ bytesProcessed++;
+
+ /*Add the YR-ADMU-NR*/
+ proto_tree_add_item(tree, hf_pdc_yr_admu_nr, tvb, offset + bytesProcessed , 4, ENC_BIG_ENDIAN);
+ bytesProcessed += 4;
+
+ /*Determine whats in the variable part*/
+ if(lenIndicator > 7)
+ {
+ /*Add the Variable Length Tree*/
+ simpduItem = proto_tree_add_item (tree, hf_pdc_simpdu_var, tvb, offset + bytesProcessed, lenIndicator - 7, ENC_NA);
+ simpduVarTree = proto_item_add_subtree (simpduItem, ett_pdc_simpdu_var);
+
+ while((offset + bytesProcessed) < ( lenIndicator + 1 ))
+ {
+ /*Get the parameter code*/
+ paramCode = tvb_get_guint8(tvb, offset + bytesProcessed);
+ simpduItem = proto_tree_add_item (simpduVarTree, hf_pdc_simpdu_param, tvb, offset + bytesProcessed, 1, ENC_NA);
+ simpduVarTree1 = proto_item_add_subtree (simpduItem, ett_pdc_simpdu_var);
+ bytesProcessed++;
+ switch (paramCode)
+ {
+ case PARAM_CODE_VERSION:
+ proto_tree_add_item(simpduVarTree1, hf_pdc_simpdu_var_len, tvb, offset +bytesProcessed, 1, ENC_NA);
+ proto_tree_add_item(simpduVarTree1, hf_pdc_simpdu_var_version, tvb, offset +bytesProcessed + 1, 1, ENC_NA);
+ bytesProcessed += 2;
+ break;
+ case PARAM_CODE_REFERENCES:
+ proto_tree_add_item(simpduVarTree1, hf_pdc_simpdu_var_len, tvb, offset +bytesProcessed, 1, ENC_NA);
+ proto_tree_add_item(simpduVarTree1, hf_pdc_simpdu_var_REFSRC, tvb, offset +bytesProcessed + 1, 2, ENC_NA);
+ proto_tree_add_item(simpduVarTree1, hf_pdc_simpdu_var_REFDEST, tvb, offset +bytesProcessed + 3, 2, ENC_NA);
+ bytesProcessed += 5;
+ break;
+ case PARAM_CODE_TRANSPORT:
+ proto_tree_add_item(simpduVarTree1, hf_pdc_simpdu_var_len, tvb, offset +bytesProcessed, 1, ENC_NA);
+ proto_tree_add_item(simpduVarTree1, hf_pdc_simpdu_var_TSEL, tvb, offset +bytesProcessed + 1, 2, ENC_NA);
+ bytesProcessed += 3;
+ break;
+ }
+ } /* end of whileloop */
+ }
+ return (bytesProcessed);
+};
+
+static int dissect_rsmpdu(void)
+{
+ return (0);
+};
+
+static int dissect_drmpdu(tvbuff_t *tvb, proto_tree *tree, guint16 offset)
+{
+ /*DR-MPDU*/
+ proto_tree_add_item(tree, hf_pdc_drmpdu_abort, tvb, offset, 1, ENC_NA);
+ proto_tree_add_item(tree, hf_pdc_drmpdu_mode, tvb, offset, 1, ENC_NA);
+ proto_tree_add_item(tree, hf_pdc_drmpdu_init, tvb, offset, 1, ENC_NA);
+ proto_tree_add_item(tree, hf_pdc_drmpdu_reason, tvb, offset + 1, 1, ENC_NA);
+
+ return (2);
+};
+
+static int dissect_admpdu(tvbuff_t *tvb, proto_tree *tree, guint16 offset, packet_info *pinfo)
+{
+ guint16 userDataLen;
+ guint16 returnLen;
+ tvbuff_t *asterixTVB;
+
+ /*Add the ad*/
+ proto_tree_add_item(tree, hf_pdc_admpdu_admpdunr, tvb, offset, 4, ENC_BIG_ENDIAN);
+ offset += 4;
+
+ if (PDC_VERSION == 2)
+ {
+ proto_tree_add_item(tree, hf_pdc_admpdu_size, tvb, offset, 2, ENC_BIG_ENDIAN);
+ /* length of user data field */
+ userDataLen = tvb_get_ntohs(tvb, offset);
+ offset += 2;
+
+ returnLen = userDataLen + 6;
+ asterixTVB = tvb_new_subset(tvb, offset, userDataLen, userDataLen);
+
+ if(asterix_handle != NULL)
+ call_dissector(asterix_handle, asterixTVB, pinfo, tree);
+
+ return (returnLen);
+ }
+ return (2);
+};
+
+static int dissect_dtmpdu(tvbuff_t *tvb, proto_tree *tree, guint16 offset, packet_info *pinfo)
+{
+ guint16 userDataLen;
+ guint16 returnLen;
+ tvbuff_t *asterixTVB;
+
+ if (PDC_VERSION == 2)
+ {
+ proto_tree_add_item(tree, hf_pdc_dtmpdu_user_size, tvb, offset, 2, ENC_BIG_ENDIAN);
+ /* length of user data field */
+ userDataLen = tvb_get_ntohs(tvb, 2);
+ returnLen = userDataLen + 2;
+ asterixTVB = tvb_new_subset(tvb, offset + 2, userDataLen, userDataLen);
+
+ if(asterix_handle != NULL)
+ call_dissector(asterix_handle, asterixTVB, pinfo, tree);
+
+ return (returnLen);
+ }
+ return (2);
+};
+
+static int dissect_edmpdu(tvbuff_t *tvb, proto_tree *tree, guint16 offset, packet_info *pinfo)
+{
+ guint16 userDataLen;
+ guint16 returnLen;
+ tvbuff_t *asterixTVB;
+
+ if (PDC_VERSION == 2)
+ {
+ proto_tree_add_item(tree, hf_pdc_dtmpdu_user_size, tvb, offset, 2, ENC_BIG_ENDIAN);
+ /* length of user data field */
+ userDataLen = tvb_get_ntohs(tvb, 2);
+ returnLen = userDataLen + 2;
+ asterixTVB = tvb_new_subset(tvb, offset + 2, userDataLen, userDataLen);
+
+ if(asterix_handle != NULL)
+ call_dissector(asterix_handle, asterixTVB, pinfo, tree);
+
+ return (returnLen);
+ }
+ return 2;
+};
+
+static int dissect_akmpdu(tvbuff_t *tvb, proto_tree *tree, guint16 offset)
+{
+ proto_tree_add_item(tree, hf_pdc_akmpdu_mns, tvb, offset, 2, ENC_BIG_ENDIAN);
+ proto_tree_add_item(tree, hf_pdc_akmpdu_cdt, tvb, offset, 2, ENC_BIG_ENDIAN);
+ proto_tree_add_item(tree, hf_pdc_yr_admu_nr, tvb, offset + 2, 4, ENC_BIG_ENDIAN);
+ return (6);
+};
+
+static int dissect_pdc_packet(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo)
+{
+ guint i = 0;
+ guint8 len_indicator;
+ guint8 mpduCode;
+ guint16 length;
+ proto_item *pdcPacketItem;
+ proto_tree *pdcPacketTree;
+
+ length = 0;
+ pdcPacketItem = NULL;
+ pdcPacketTree = NULL;
+
+ /*Get the length indictor and the MPDU Code*/
+ len_indicator = tvb_get_guint8 (tvb, i);
+ mpduCode = tvb_get_guint8 (tvb, i + 1);
+ length += 2;
+
+ /*Add the PDC Tree*/
+ pdcPacketItem = proto_tree_add_item (tree, proto_pdc, tvb, i, len_indicator + 1, ENC_NA);
+ pdcPacketTree = proto_item_add_subtree (pdcPacketItem, ett_pdc);
+
+ /*Add the Length and packet type*/
+ proto_tree_add_item(pdcPacketTree, hf_pdc_len, tvb, i, 1, ENC_BIG_ENDIAN);
+ proto_tree_add_item(pdcPacketTree, hf_pdc_mpdu_code, tvb, i + 1, 1, ENC_BIG_ENDIAN);
+
+ /*Call the correct dissecting function*/
+ switch(mpduCode)
+ {
+ case SIMPDU:
+ length += dissect_simpdu(tvb, pdcPacketTree, length, len_indicator);
+ col_set_str(pinfo->cinfo, COL_INFO, "SIMPDU");
+ break;
+ case RSMPDU:
+ length += dissect_rsmpdu();
+ col_set_str(pinfo->cinfo, COL_INFO, "RSMPDU");
+ break;
+ case DRMPDU:
+ length += dissect_drmpdu(tvb, pdcPacketTree, length);
+ col_set_str(pinfo->cinfo, COL_INFO, "DRMPDU");
+ break;
+ case DTMPDU:
+ length += dissect_dtmpdu(tvb, pdcPacketTree, length, pinfo);
+ col_set_str(pinfo->cinfo, COL_INFO, "DTMPDU");
+ break;
+ case ADMPDU:
+ length += dissect_admpdu(tvb, pdcPacketTree, length, pinfo);
+ col_set_str(pinfo->cinfo, COL_INFO, "ADMPDU");
+ break;
+ case EDMPDU:
+ length += dissect_edmpdu(tvb, pdcPacketTree, length, pinfo);
+ col_set_str(pinfo->cinfo, COL_INFO, "EDMPDU");
+ break;
+ case AKMPDU:
+ length += dissect_akmpdu(tvb, pdcPacketTree, length);
+ col_set_str(pinfo->cinfo, COL_INFO, "AKMPDU");
+ break;
+ default:
+ break;
+ };
+ return (length);
+};
+
+/* Actual dissector bits and bytes done here */
+static int dissect_pdc(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
+{
+
+ /*Set the Column*/
+ col_set_str (pinfo->cinfo, COL_PROTOCOL, PDC_PROCOTOL );
+ col_clear (pinfo->cinfo, COL_INFO);
+
+ if (tree)
+ { /* we are being asked for details */
+ dissect_pdc_packet(tvb, tree, pinfo);
+ }
+
+ return tvb_length(tvb);
+};
+
+/* function to provide TCP split packet combiner with size of packet */
+static guint get_pdc_message_len(packet_info *pinfo _U_, tvbuff_t *tvb, int offset)
+{
+ guint16 size;
+ guint8 extra=0;
+ guint8 mpdu_type=0;
+ mpdu_type=tvb_get_guint8(tvb,offset+1);
+ switch (mpdu_type)
+ {
+ case SIMPDU:
+ size=tvb_get_guint8(tvb,offset);
+ extra=1;
+ break;
+ case RSMPDU:
+ size=tvb_get_guint8(tvb,offset);
+ extra=1;
+ break;
+ case DRMPDU:
+ size=tvb_get_guint8(tvb,offset);
+ extra=1;
+ break;
+ case DTMPDU:
+ size=tvb_get_ntohs(tvb, offset+2);
+ extra=4;
+ break;
+ case ADMPDU:
+ size=tvb_get_ntohs(tvb,offset+6);
+ extra=8;
+ break;
+ case EDMPDU:
+ size=tvb_get_guint8(tvb,offset);
+ extra=1;
+ break;
+ case AKMPDU:
+ size=tvb_get_guint8(tvb,offset)+1;
+ extra=0;
+ break;
+ default:
+ size=0;
+ extra=0;
+ }
+ return (guint)(size+extra);
+};
+
+/* top level call to recombine split tcp packets */
+
+static void tcp_dissect_pdc(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
+{
+ guint8 mpdu_type=0;
+ guint8 minimum_bytes=2;
+ mpdu_type=tvb_get_guint8(tvb,1);
+ switch (mpdu_type)
+ {
+ case SIMPDU:
+ minimum_bytes=2;
+ break;
+ case RSMPDU:
+ minimum_bytes=2;
+ break;
+ case DRMPDU:
+ minimum_bytes=2;
+ break;
+ case DTMPDU:
+ minimum_bytes=4;
+ break;
+ case ADMPDU:
+ minimum_bytes=8;
+ break;
+ case EDMPDU:
+ minimum_bytes=2;
+ break;
+ case AKMPDU:
+ minimum_bytes=2;
+ break;
+ default:
+ minimum_bytes=2;
+ break;
+ }
+ tcp_dissect_pdus(tvb, pinfo, tree, TRUE, minimum_bytes, get_pdc_message_len, dissect_pdc, NULL);
+};
+
+/* function to register pdc dissector and get handle for asterix dissector */
+void proto_reg_handoff_pdc(void)
+{
+ dissector_handle_t pdc_handle;
+
+ asterix_handle = find_dissector("asterix");
+ pdc_handle = create_dissector_handle(tcp_dissect_pdc, proto_pdc);
+ dissector_add_uint("tcp.port", gPREF_PORT_NUM_TCP, pdc_handle);
+};
+
+void proto_register_pdc(void)
+{
+ module_t *pdc_pref_module;
+
+ static hf_register_info hf[] =
+ {
+ { &hf_pdc_len,{ "Length Indicator", "pdc.li",FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
+ { &hf_pdc_mpdu_code,{ "MPDU code", "pdc.mpducode", FT_UINT8, BASE_DEC, VALS(valstr_mpdus), 0x0, NULL, HFILL }},
+ { &hf_pdc_credit,{ "Credit", "pdc.cdt", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
+ { &hf_pdc_yr_admu_nr,{ "YR-ADMU-NR", "pdc.yradmunr", FT_UINT32, BASE_DEC, NULL, 0x0, NULL , HFILL }},
+ { &hf_pdc_simpdu_state,{ "State", "pdc.state", FT_UINT8, BASE_DEC, VALS(valstr_simpdu_state), 0x0, NULL, HFILL }},
+ { &hf_pdc_akmpdu_mns,{ "MNS", "pdc.akmpdu.mns", FT_UINT16, BASE_DEC, NULL, 0x8000, NULL, HFILL }},
+ { &hf_pdc_akmpdu_cdt,{ "CDT", "pdc.akmpdu.cdt", FT_UINT16, BASE_DEC, NULL, 0x07FF, NULL, HFILL }},
+ { &hf_pdc_simpdu_var,{ "Variable Part", "pdc.simpdu.variable", FT_NONE, BASE_NONE, NULL, 0x0, NULL, HFILL }},
+ { &hf_pdc_simpdu_param,{ "Parameter", "pdc.simpdu.param", FT_UINT8, BASE_DEC, VALS(valstr_simpdu_param), 0x0, NULL, HFILL }},
+ { &hf_pdc_simpdu_var_len, { "Length", "pdc.simpdu.variable.length", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
+ { &hf_pdc_simpdu_var_version, { "PDC Version Number", "pdc.simpdu.variable.version", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
+ { &hf_pdc_simpdu_var_REFSRC,{ "Reference Source", "pdc.simpdu.variable.refsrc", FT_UINT32, BASE_DEC, NULL, 0x0,NULL, HFILL }},
+ { &hf_pdc_simpdu_var_REFDEST,{ "Reference Destination", "pdc.simpdu.variable.refdst",FT_UINT32, BASE_DEC, NULL, 0x0,NULL, HFILL }},
+ { &hf_pdc_simpdu_var_TSEL,{ "Transport Selector", "pdc.simpdu.tsel", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
+ { &hf_pdc_drmpdu_abort,{ "Abort", "pdc.drmpdu.abort", FT_UINT8, BASE_DEC, VALS(valstr_drmpdu_abort), 0x80, NULL, HFILL }},
+ { &hf_pdc_drmpdu_reason,{ "Reason", "pdc.drmpdu.reason", FT_UINT8, BASE_DEC, VALS(valstr_drmpdu_reason), 0x0, NULL, HFILL }},
+ { &hf_pdc_drmpdu_mode,{ "Mode", "pdc.drmpdu.mode", FT_UINT8, BASE_DEC, VALS(valstr_drmpdu_mode), 0x70, NULL, HFILL }},
+ { &hf_pdc_drmpdu_init,{ "Reason", "pdc.drmpdu.init", FT_UINT8, BASE_DEC, VALS(valstr_drmpdu_initatior), 0x0F, NULL, HFILL }},
+ { &hf_pdc_dtmpdu_user_size,{ "User Data Length", "pdc.dtmpdu.usersize", FT_UINT16, BASE_DEC, NULL, 0x0, NULL , HFILL }},
+ { &hf_pdc_admpdu_admpdunr,{ "AD-MPDU-NR", "pdc.admpdu.admpdunr",FT_UINT32, BASE_DEC, NULL, 0x0, NULL , HFILL }},
+ { &hf_pdc_admpdu_size,{ "User Data Size", "pdc.admpdu.usersize",FT_UINT16, BASE_DEC, NULL, 0x0, NULL , HFILL }},
+ };
+
+ /* Setup protocol subtree array */
+ static gint *ett[] = {
+ &ett_pdc,
+ &ett_pdc_simpdu_var
+ };
+
+ proto_pdc = proto_register_protocol (
+ "PDC Protocol", /* name */
+ "PDC", /* short name */
+ "pdc" /* abbrev */
+ );
+
+ /*Required Function Calls to register the header fields and subtrees used*/
+ proto_register_field_array(proto_pdc, hf, array_length(hf));
+ proto_register_subtree_array(ett, array_length(ett));
+ new_register_dissector("pdc", dissect_pdc, proto_pdc);
+
+ /*Register Preferences Module*/
+ pdc_pref_module = prefs_register_protocol(proto_pdc, proto_reg_handoff_pdc);
+
+ /*Register Preferences*/
+ prefs_register_uint_preference(pdc_pref_module, "tcp.port", "PDC Port", "PDC Port if other then the default", 10, &gPREF_PORT_NUM_TCP);
+};
+
+/*
+ * Editor modelines - http://www.wireshark.org/tools/modelines.html
+ *
+ * Local variables:
+ * c-basic-offset: 8
+ * tab-width: 8
+ * indent-tabs-mode: t
+ * End:
+ *
+ * vi: set shiftwidth=8 tabstop=8 noexpandtab:
+ * :indentSize=8:tabSize=8:noTabs=false:
+ */
\ No newline at end of file
git.samba.org / metze / wireshark / wip.git / commitdiff