forked from osmocom/wireshark
840 lines
24 KiB
C
840 lines
24 KiB
C
/* packet-pptp.c
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* Routines for the Point-to-Point Tunnelling Protocol (PPTP) (RFC 2637)
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* Brad Robel-Forrest <brad.robel-forrest@watchguard.com>
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*
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* $Id: packet-pptp.c,v 1.29 2003/08/12 02:05:41 gerald Exp $
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@ethereal.com>
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* Copyright 1998 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <stdio.h>
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#include <glib.h>
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#include <epan/packet.h>
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static int proto_pptp = -1;
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static int hf_pptp_message_type = -1;
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static gint ett_pptp = -1;
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static dissector_handle_t data_handle;
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#define TCP_PORT_PPTP 1723
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#define MAGIC_COOKIE 0x1A2B3C4D
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static const value_string msgtype_vals[] = {
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{ 1, "Control Message" },
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{ 2, "Management Message" },
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{ 0, NULL }
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};
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#define NUM_FRAME_TYPES 4
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#define frametype2str(t) \
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((t < NUM_FRAME_TYPES) ? frametypestr[t] : "Unknown framing type")
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static const char *frametypestr[NUM_FRAME_TYPES] = {
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"Unknown framing type",
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"Asynchronous Framing supported",
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"Synchronous Framing supported",
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"Either Framing supported"
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};
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#define NUM_BEARER_TYPES 4
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#define bearertype2str(t) \
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((t < NUM_BEARER_TYPES) ? bearertypestr[t] : "Unknown bearer type")
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static const char *bearertypestr[NUM_BEARER_TYPES] = {
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"Unknown bearer type",
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"Analog access supported",
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"Digital access supported",
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"Either access supported"
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};
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#define NUM_CNTRLRESULT_TYPES 6
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#define cntrlresulttype2str(t) \
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((t < NUM_CNTRLRESULT_TYPES) ? cntrlresulttypestr[t] : "Unknown Start-Control-connection-Reply result code")
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static const char *cntrlresulttypestr[NUM_CNTRLRESULT_TYPES] = {
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"Unknown Start-Control-connection-Reply result code",
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"Successful channel establishment",
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"General error",
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"Command channel already exists",
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"Requester not authorized",
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"Protocol version not supported"
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};
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#define NUM_ERROR_TYPES 7
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#define errortype2str(t) \
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((t < NUM_ERROR_TYPES) ? errortypestr[t] : "Unknown general error code")
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static const char *errortypestr[NUM_ERROR_TYPES] = {
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"None",
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"Not-Connected",
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"Bad-Format",
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"Bad-Value",
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"No-Resource",
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"Bad-Call ID",
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"PAC-Error"
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};
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#define NUM_REASON_TYPES 4
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#define reasontype2str(t) \
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((t < NUM_REASON_TYPES) ? reasontypestr[t] : "Unknown Stop-Control-Connection-Request reason code")
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static const char *reasontypestr[NUM_REASON_TYPES] = {
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"Unknown Stop-Control-Connection-Request reason code",
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"None",
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"Stop-Protocol",
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"Stop-Local-Shutdown"
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};
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#define NUM_STOPRESULT_TYPES 3
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#define stopresulttype2str(t) \
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((t < NUM_STOPRESULT_TYPES) ? stopresulttypestr[t] : "Unknown Stop-Control-Connection-Reply result code")
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static const char *stopresulttypestr[NUM_STOPRESULT_TYPES] = {
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"Unknown Stop-Control-Connection-Reply result code",
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"OK",
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"General error"
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};
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#define NUM_ECHORESULT_TYPES 3
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#define echoresulttype2str(t) \
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((t < NUM_ECHORESULT_TYPES) ? echoresulttypestr[t] : "Unknown Echo-Reply result code")
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static const char *echoresulttypestr[NUM_ECHORESULT_TYPES] = {
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"Unknown Echo-Reply result code",
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"OK",
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"General error"
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};
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#define NUM_OUTRESULT_TYPES 8
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#define outresulttype2str(t) \
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((t < NUM_OUTRESULT_TYPES) ? outresulttypestr[t] : "Unknown Outgoing-Call-Reply result code")
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static const char *outresulttypestr[NUM_OUTRESULT_TYPES] = {
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"Unknown Outgoing-Call-Reply result code",
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"Connected",
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"General Error",
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"No Carrier",
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"Busy",
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"No Dial Tone",
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"Time-out",
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"Do Not Accept"
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};
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#define NUM_INRESULT_TYPES 4
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#define inresulttype2str(t) \
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((t < NUM_INRESULT_TYPES) ? inresulttypestr[t] : "Unknown Incoming-Call-Reply result code")
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static const char *inresulttypestr[NUM_INRESULT_TYPES] = {
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"Unknown Incoming-Call-Reply result code",
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"Connect",
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"General Error",
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"Do Not Accept"
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};
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#define NUM_DISCRESULT_TYPES 5
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#define discresulttype2str(t) \
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((t < NUM_DISCRESULT_TYPES) ? discresulttypestr[t] : "Unknown Call-Disconnect-Notify result code")
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static const char *discresulttypestr[NUM_DISCRESULT_TYPES] = {
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"Unknown Call-Disconnect-Notify result code",
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"Lost Carrier",
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"General Error",
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"Admin Shutdown",
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"Request"
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};
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static void dissect_unknown(tvbuff_t *, int, packet_info *, proto_tree *);
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static void dissect_cntrl_req(tvbuff_t *, int, packet_info *, proto_tree *);
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static void dissect_cntrl_reply(tvbuff_t *, int, packet_info *, proto_tree *);
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static void dissect_stop_req(tvbuff_t *, int, packet_info *, proto_tree *);
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static void dissect_stop_reply(tvbuff_t *, int, packet_info *, proto_tree *);
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static void dissect_echo_req(tvbuff_t *, int, packet_info *, proto_tree *);
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static void dissect_echo_reply(tvbuff_t *, int, packet_info *, proto_tree *);
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static void dissect_out_req(tvbuff_t *, int, packet_info *, proto_tree *);
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static void dissect_out_reply(tvbuff_t *, int, packet_info *, proto_tree *);
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static void dissect_in_req(tvbuff_t *, int, packet_info *, proto_tree *);
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static void dissect_in_reply(tvbuff_t *, int, packet_info *, proto_tree *);
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static void dissect_in_connected(tvbuff_t *, int, packet_info *, proto_tree *);
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static void dissect_clear_req(tvbuff_t *, int, packet_info *, proto_tree *);
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static void dissect_disc_notify(tvbuff_t *, int, packet_info *, proto_tree *);
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static void dissect_error_notify(tvbuff_t *, int, packet_info *, proto_tree *);
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static void dissect_set_link(tvbuff_t *, int, packet_info *, proto_tree *);
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#define NUM_CNTRL_TYPES 16
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#define cntrltype2str(t) \
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((t < NUM_CNTRL_TYPES) ? strfuncs[t].str : "UNKNOWN-CONTROL-TYPE")
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static struct strfunc {
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const char * str;
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void (*func)(tvbuff_t *, int, packet_info *, proto_tree *);
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} strfuncs[NUM_CNTRL_TYPES] = {
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{"Unknown control type", dissect_unknown },
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{"Start-Control-Connection-Request", dissect_cntrl_req },
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{"Start-Control-Connection-Reply", dissect_cntrl_reply },
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{"Stop-Control-Connection-Request", dissect_stop_req },
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{"Stop-Control-Connection-Reply", dissect_stop_reply },
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{"Echo-Request", dissect_echo_req },
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{"Echo-Reply", dissect_echo_reply },
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{"Outgoing-Call-Request", dissect_out_req },
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{"Outgoing-Call-Reply", dissect_out_reply },
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{"Incoming-Call-Request", dissect_in_req },
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{"Incoming-Call-Reply", dissect_in_reply },
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{"Incoming-Call-Connected", dissect_in_connected },
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{"Call-Clear-Request", dissect_clear_req },
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{"Call-Disconnect-Notify", dissect_disc_notify },
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{"WAN-Error-Notify", dissect_error_notify },
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{"Set-Link-Info", dissect_set_link }
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};
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/*
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* Length of host name and vendor name strings in control requests and
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* replies.
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*/
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#define HOSTLEN 64
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#define VENDORLEN 64
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/*
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* Length of phone number(s) and subaddress in call requests.
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*/
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#define PHONELEN 64
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#define SUBADDRLEN 64
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/*
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* Length of statistics in a Call-Disconnect-Notify message.
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*/
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#define STATSLEN 128
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static void
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dissect_pptp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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int offset = 0;
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guint16 len;
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guint16 cntrl_type;
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if (check_col(pinfo->cinfo, COL_PROTOCOL))
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "PPTP");
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if (check_col(pinfo->cinfo, COL_INFO))
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col_clear(pinfo->cinfo, COL_INFO);
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len = tvb_get_ntohs(tvb, offset);
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cntrl_type = tvb_get_ntohs(tvb, offset + 8);
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if (check_col(pinfo->cinfo, COL_INFO))
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col_add_fstr(pinfo->cinfo, COL_INFO, "%s", cntrltype2str(cntrl_type));
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if (tree) {
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guint32 cookie;
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proto_item * ti;
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proto_tree * pptp_tree;
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ti = proto_tree_add_item(tree, proto_pptp, tvb, offset, len, FALSE);
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pptp_tree = proto_item_add_subtree(ti, ett_pptp);
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proto_tree_add_text(pptp_tree, tvb, offset, 2, "Length: %u", len);
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offset += 2;
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proto_tree_add_item(pptp_tree, hf_pptp_message_type, tvb,
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offset, 2, FALSE);
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offset += 2;
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cookie = tvb_get_ntohl(tvb, offset);
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if (cookie == MAGIC_COOKIE)
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proto_tree_add_text(pptp_tree, tvb, offset, 4,
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"Cookie: %#08x (correct)", cookie);
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else
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proto_tree_add_text(pptp_tree, tvb, offset, 4,
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"Cookie: %#08x (incorrect)", cookie);
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offset += 4;
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proto_tree_add_text(pptp_tree, tvb, offset, 2,
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"Control type: %s (%u)", cntrltype2str(cntrl_type), cntrl_type);
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offset += 2;
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proto_tree_add_text(pptp_tree, tvb, offset, 2,
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"Reserved: %u", tvb_get_ntohs(tvb, offset));
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offset += 2;
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if (cntrl_type < NUM_CNTRL_TYPES)
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( *(strfuncs[cntrl_type].func))(tvb, offset, pinfo, pptp_tree);
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else
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call_dissector(data_handle,tvb_new_subset(tvb, offset, -1, -1), pinfo, pptp_tree);
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}
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}
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static void
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dissect_unknown(tvbuff_t *tvb, int offset, packet_info *pinfo,
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proto_tree *tree)
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{
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call_dissector(data_handle,tvb_new_subset(tvb, offset, -1, -1), pinfo, tree);
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}
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static void
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dissect_cntrl_req(tvbuff_t *tvb, int offset, packet_info *pinfo _U_,
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proto_tree *tree)
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{
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guint8 major_ver;
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guint8 minor_ver;
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guint32 frame;
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guint32 bearer;
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guint8 host[HOSTLEN+1];
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guint8 vendor[VENDORLEN+1];
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major_ver = tvb_get_guint8(tvb, offset);
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minor_ver = tvb_get_guint8(tvb, offset + 1);
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proto_tree_add_text(tree, tvb, offset, 2,
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"Protocol version: %u.%u", major_ver, minor_ver);
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offset += 2;
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proto_tree_add_text(tree, tvb, offset, 2,
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"Reserved: %u", tvb_get_ntohs(tvb, offset));
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offset += 2;
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frame = tvb_get_ntohl(tvb, offset);
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proto_tree_add_text(tree, tvb, offset, 4,
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"Framing capabilities: %s (%u)", frametype2str(frame), frame);
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offset += 4;
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bearer = tvb_get_ntohl(tvb, offset);
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proto_tree_add_text(tree, tvb, offset, 4,
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"Bearer capabilities: %s (%u)", bearertype2str(bearer), bearer);
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offset += 4;
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proto_tree_add_text(tree, tvb, offset, 2,
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"Maximum channels: %u", tvb_get_ntohs(tvb, offset));
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offset += 2;
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proto_tree_add_text(tree, tvb, offset, 2,
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"Firmware revision: %u", tvb_get_ntohs(tvb, offset));
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offset += 2;
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tvb_memcpy(tvb, host, offset, HOSTLEN);
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host[HOSTLEN] = '\0';
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proto_tree_add_text(tree, tvb, offset, HOSTLEN,
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"Hostname: %s", host);
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offset += HOSTLEN;
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tvb_memcpy(tvb, vendor, offset, VENDORLEN);
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vendor[VENDORLEN] = '\0';
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proto_tree_add_text(tree, tvb, offset, VENDORLEN,
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"Vendor: %s", vendor);
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}
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static void
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dissect_cntrl_reply(tvbuff_t *tvb, int offset, packet_info *pinfo _U_,
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proto_tree *tree)
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{
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guint8 major_ver;
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guint8 minor_ver;
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guint8 result;
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guint8 error;
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guint32 frame;
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guint32 bearer;
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guint8 host[HOSTLEN+1];
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guint8 vendor[VENDORLEN+1];
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major_ver = tvb_get_guint8(tvb, offset);
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minor_ver = tvb_get_guint8(tvb, offset + 1);
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proto_tree_add_text(tree, tvb, offset, 2,
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"Protocol version: %u.%u", major_ver, minor_ver);
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offset += 2;
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result = tvb_get_guint8(tvb, offset);
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proto_tree_add_text(tree, tvb, offset, 1,
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"Result: %s (%u)", cntrlresulttype2str(result), result);
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offset += 1;
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error = tvb_get_guint8(tvb, offset);
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proto_tree_add_text(tree, tvb, offset, 1,
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"Error: %s (%u)", errortype2str(error), error);
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offset += 1;
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frame = tvb_get_ntohl(tvb, offset);
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proto_tree_add_text(tree, tvb, offset, 4,
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"Framing capabilities: %s (%u)", frametype2str(frame), frame);
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offset += 4;
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bearer = tvb_get_ntohl(tvb, offset);
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proto_tree_add_text(tree, tvb, offset, 4,
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"Bearer capabilities: %s (%u)", bearertype2str(bearer), bearer);
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offset += 4;
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proto_tree_add_text(tree, tvb, offset, 2,
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"Maximum channels: %u", tvb_get_ntohs(tvb, offset));
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offset += 2;
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proto_tree_add_text(tree, tvb, offset, 2,
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"Firmware revision: %u", tvb_get_ntohs(tvb, offset));
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offset += 2;
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tvb_memcpy(tvb, host, offset, HOSTLEN);
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host[HOSTLEN] = '\0';
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proto_tree_add_text(tree, tvb, offset, HOSTLEN,
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"Hostname: %s", host);
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offset += HOSTLEN;
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tvb_memcpy(tvb, vendor, offset, VENDORLEN);
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vendor[VENDORLEN] = '\0';
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proto_tree_add_text(tree, tvb, offset, VENDORLEN,
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"Vendor: %s", vendor);
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}
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static void
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dissect_stop_req(tvbuff_t *tvb, int offset, packet_info *pinfo _U_,
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proto_tree *tree)
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{
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guint8 reason;
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reason = tvb_get_guint8(tvb, offset);
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proto_tree_add_text(tree, tvb, offset, 1,
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"Reason: %s (%u)", reasontype2str(reason), reason);
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offset += 1;
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proto_tree_add_text(tree, tvb, offset, 1,
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"Reserved: %u", tvb_get_guint8(tvb, offset));
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offset += 1;
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proto_tree_add_text(tree, tvb, offset, 2,
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"Reserved: %u", tvb_get_ntohs(tvb, offset));
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}
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static void
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dissect_stop_reply(tvbuff_t *tvb, int offset, packet_info *pinfo _U_,
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proto_tree *tree)
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{
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guint8 result;
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guint8 error;
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result = tvb_get_guint8(tvb, offset);
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proto_tree_add_text(tree, tvb, offset, 1,
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"Result: %s (%u)", stopresulttype2str(result), result);
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offset += 1;
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error = tvb_get_guint8(tvb, offset);
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proto_tree_add_text(tree, tvb, offset, 1,
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"Error: %s (%u)", errortype2str(error), error);
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offset += 1;
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proto_tree_add_text(tree, tvb, offset, 2,
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"Reserved: %u", tvb_get_ntohs(tvb, offset));
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}
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static void
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dissect_echo_req(tvbuff_t *tvb, int offset, packet_info *pinfo _U_,
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proto_tree *tree)
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{
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proto_tree_add_text(tree, tvb, offset, 4,
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"Identifier: %u", tvb_get_ntohl(tvb, offset));
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}
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static void
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dissect_echo_reply(tvbuff_t *tvb, int offset, packet_info *pinfo _U_,
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proto_tree *tree)
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{
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guint8 result;
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guint8 error;
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proto_tree_add_text(tree, tvb, offset, 4,
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|
"Identifier: %u", tvb_get_ntohl(tvb, offset));
|
|
offset += 4;
|
|
|
|
result = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"Result: %s (%u)", echoresulttype2str(result), result);
|
|
offset += 1;
|
|
|
|
error = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_text(tree, tvb, offset, sizeof(error),
|
|
"Error: %s (%u)", errortype2str(error), error);
|
|
offset += 1;
|
|
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"Reserved: %u", tvb_get_ntohs(tvb, offset));
|
|
}
|
|
|
|
static void
|
|
dissect_out_req(tvbuff_t *tvb, int offset, packet_info *pinfo _U_,
|
|
proto_tree *tree)
|
|
{
|
|
guint32 bearer;
|
|
guint32 frame;
|
|
guint8 phone[PHONELEN+1];
|
|
guint8 subaddr[SUBADDRLEN+1];
|
|
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"Call ID: %u", tvb_get_ntohs(tvb, offset));
|
|
offset += 2;
|
|
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"Call Serial Number: %u", tvb_get_ntohs(tvb, offset));
|
|
offset += 2;
|
|
|
|
proto_tree_add_text(tree, tvb, offset, 4,
|
|
"Minimum BPS: %u", tvb_get_ntohl(tvb, offset));
|
|
offset += 4;
|
|
|
|
proto_tree_add_text(tree, tvb, offset, 4,
|
|
"Maximum BPS: %u", tvb_get_ntohl(tvb, offset));
|
|
offset += 4;
|
|
|
|
bearer = tvb_get_ntohl(tvb, offset);
|
|
proto_tree_add_text(tree, tvb, offset, 4,
|
|
"Bearer capabilities: %s (%u)", bearertype2str(bearer), bearer);
|
|
offset += 4;
|
|
|
|
frame = tvb_get_ntohl(tvb, offset);
|
|
proto_tree_add_text(tree, tvb, offset, 4,
|
|
"Framing capabilities: %s (%u)", frametype2str(frame), frame);
|
|
offset += 4;
|
|
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"Receive window size: %u", tvb_get_ntohs(tvb, offset));
|
|
offset += 2;
|
|
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"Processing delay: %u", tvb_get_ntohs(tvb, offset));
|
|
offset += 2;
|
|
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"Phone number length: %u", tvb_get_ntohs(tvb, offset));
|
|
offset += 2;
|
|
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"Reserved: %u", tvb_get_ntohs(tvb, offset));
|
|
offset += 2;
|
|
|
|
tvb_memcpy(tvb, phone, offset, PHONELEN);
|
|
phone[PHONELEN] = '\0';
|
|
proto_tree_add_text(tree, tvb, offset, PHONELEN,
|
|
"Phone number: %s", phone);
|
|
offset += PHONELEN;
|
|
|
|
tvb_memcpy(tvb, subaddr, offset, SUBADDRLEN);
|
|
subaddr[SUBADDRLEN] = '\0';
|
|
proto_tree_add_text(tree, tvb, offset, SUBADDRLEN,
|
|
"Subaddress: %s", subaddr);
|
|
}
|
|
|
|
static void
|
|
dissect_out_reply(tvbuff_t *tvb, int offset, packet_info *pinfo _U_,
|
|
proto_tree *tree)
|
|
{
|
|
guint8 result;
|
|
guint8 error;
|
|
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"Call ID: %u", tvb_get_ntohs(tvb, offset));
|
|
offset += 2;
|
|
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"Peer's call ID: %u", tvb_get_ntohs(tvb, offset));
|
|
offset += 2;
|
|
|
|
result = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"Result: %s (%u)", outresulttype2str(result), result);
|
|
offset += 1;
|
|
|
|
error = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"Error: %s (%u)", errortype2str(error), error);
|
|
offset += 1;
|
|
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"Cause code: %u", tvb_get_ntohs(tvb, offset));
|
|
offset += 2;
|
|
|
|
proto_tree_add_text(tree, tvb, offset, 4,
|
|
"Connect speed: %u", tvb_get_ntohl(tvb, offset));
|
|
offset += 4;
|
|
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"Receive window size: %u", tvb_get_ntohs(tvb, offset));
|
|
offset += 2;
|
|
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"Processing delay: %u", tvb_get_ntohs(tvb, offset));
|
|
offset += 2;
|
|
|
|
proto_tree_add_text(tree, tvb, offset, 4,
|
|
"Physical channel ID: %u", tvb_get_ntohl(tvb, offset));
|
|
}
|
|
|
|
static void
|
|
dissect_in_req(tvbuff_t *tvb, int offset, packet_info *pinfo _U_,
|
|
proto_tree *tree)
|
|
{
|
|
guint32 bearer;
|
|
guint8 dialed[PHONELEN+1];
|
|
guint8 dialing[PHONELEN+1];
|
|
guint8 subaddr[SUBADDRLEN+1];
|
|
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"Call ID: %u", tvb_get_ntohs(tvb, offset));
|
|
offset += 2;
|
|
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"Call serial number: %u", tvb_get_ntohs(tvb, offset));
|
|
offset += 2;
|
|
|
|
bearer = tvb_get_ntohl(tvb, offset);
|
|
proto_tree_add_text(tree, tvb, offset, 4,
|
|
"Bearer capabilities: %s (%u)", bearertype2str(bearer), bearer);
|
|
offset += 4;
|
|
|
|
proto_tree_add_text(tree, tvb, offset, 4,
|
|
"Physical channel ID: %u", tvb_get_ntohl(tvb, offset));
|
|
offset += 4;
|
|
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"Dialed number length: %u", tvb_get_ntohs(tvb, offset));
|
|
offset += 2;
|
|
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"Dialing number length: %u", tvb_get_ntohs(tvb, offset));
|
|
offset += 2;
|
|
|
|
tvb_memcpy(tvb, dialing, offset, PHONELEN);
|
|
dialed[PHONELEN] = '\0';
|
|
proto_tree_add_text(tree, tvb, offset, PHONELEN,
|
|
"Dialed number: %s", dialed);
|
|
offset += PHONELEN;
|
|
|
|
tvb_memcpy(tvb, dialing, offset, PHONELEN);
|
|
dialing[PHONELEN] = '\0';
|
|
proto_tree_add_text(tree, tvb, offset, PHONELEN,
|
|
"Dialing number: %s", dialing);
|
|
offset += PHONELEN;
|
|
|
|
tvb_memcpy(tvb, subaddr, offset, SUBADDRLEN);
|
|
subaddr[SUBADDRLEN] = '\0';
|
|
proto_tree_add_text(tree, tvb, offset, SUBADDRLEN,
|
|
"Subaddress: %s", subaddr);
|
|
}
|
|
|
|
static void
|
|
dissect_in_reply(tvbuff_t *tvb, int offset, packet_info *pinfo _U_,
|
|
proto_tree *tree)
|
|
{
|
|
guint8 result;
|
|
guint8 error;
|
|
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"Call ID: %u", tvb_get_ntohs(tvb, offset));
|
|
offset += 2;
|
|
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"Peer's call ID: %u", tvb_get_ntohs(tvb, offset));
|
|
offset += 2;
|
|
|
|
result = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"Result: %s (%u)", inresulttype2str(result), result);
|
|
offset += 1;
|
|
|
|
error = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"Error: %s (%u)", errortype2str(error), error);
|
|
offset += 1;
|
|
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"Receive window size: %u", tvb_get_ntohs(tvb, offset));
|
|
offset += 2;
|
|
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"Processing delay: %u", tvb_get_ntohs(tvb, offset));
|
|
offset += 2;
|
|
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"Reserved: %u", tvb_get_ntohs(tvb, offset));
|
|
}
|
|
|
|
static void
|
|
dissect_in_connected(tvbuff_t *tvb, int offset, packet_info *pinfo _U_,
|
|
proto_tree *tree)
|
|
{
|
|
guint32 frame;
|
|
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"Peer's call ID: %u", tvb_get_ntohs(tvb, offset));
|
|
offset += 2;
|
|
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"Reserved: %u", tvb_get_ntohs(tvb, offset));
|
|
offset += 2;
|
|
|
|
proto_tree_add_text(tree, tvb, offset, 4,
|
|
"Connect speed: %u", tvb_get_ntohl(tvb, offset));
|
|
offset += 4;
|
|
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"Receive window size: %u", tvb_get_ntohs(tvb, offset));
|
|
offset += 2;
|
|
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"Processing delay: %u", tvb_get_ntohs(tvb, offset));
|
|
offset += 2;
|
|
|
|
frame = tvb_get_ntohl(tvb, offset);
|
|
proto_tree_add_text(tree, tvb, offset, 4,
|
|
"Framing capabilities: %s (%u)", frametype2str(frame), frame);
|
|
}
|
|
|
|
static void
|
|
dissect_clear_req(tvbuff_t *tvb, int offset, packet_info *pinfo _U_,
|
|
proto_tree *tree)
|
|
{
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"Call ID: %u", tvb_get_ntohs(tvb, offset));
|
|
offset += 2;
|
|
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"Reserved: %u", tvb_get_ntohs(tvb, offset));
|
|
}
|
|
|
|
static void
|
|
dissect_disc_notify(tvbuff_t *tvb, int offset, packet_info *pinfo _U_,
|
|
proto_tree *tree)
|
|
{
|
|
guint8 result;
|
|
guint8 error;
|
|
guint8 stats[STATSLEN+1];
|
|
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"Call ID: %u", tvb_get_ntohs(tvb, offset));
|
|
offset += 2;
|
|
|
|
result = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"Result: %s (%u)", discresulttype2str(result), result);
|
|
offset += 1;
|
|
|
|
error = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"Error: %s (%u)", errortype2str(error), error);
|
|
offset += 1;
|
|
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"Cause code: %u", tvb_get_ntohs(tvb, offset));
|
|
offset += 2;
|
|
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"Reserved: %u", tvb_get_ntohs(tvb, offset));
|
|
offset += 2;
|
|
|
|
tvb_memcpy(tvb, stats, offset, STATSLEN);
|
|
stats[STATSLEN] = '\0';
|
|
proto_tree_add_text(tree, tvb, offset, STATSLEN,
|
|
"Call statistics: %s", stats);
|
|
}
|
|
|
|
static void
|
|
dissect_error_notify(tvbuff_t *tvb, int offset, packet_info *pinfo _U_,
|
|
proto_tree *tree)
|
|
{
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"Peer's call ID: %u", tvb_get_ntohs(tvb, offset));
|
|
offset += 2;
|
|
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"Reserved: %u", tvb_get_ntohs(tvb, offset));
|
|
offset += 2;
|
|
|
|
proto_tree_add_text(tree, tvb, offset, 4,
|
|
"CRC errors: %u", tvb_get_ntohl(tvb, offset));
|
|
offset += 4;
|
|
|
|
proto_tree_add_text(tree, tvb, offset, 4,
|
|
"Framing errors: %u", tvb_get_ntohl(tvb, offset));
|
|
offset += 4;
|
|
|
|
proto_tree_add_text(tree, tvb, offset, 4,
|
|
"Hardware overruns: %u", tvb_get_ntohl(tvb, offset));
|
|
offset += 4;
|
|
|
|
proto_tree_add_text(tree, tvb, offset, 4,
|
|
"Buffer overruns: %u", tvb_get_ntohl(tvb, offset));
|
|
offset += 4;
|
|
|
|
proto_tree_add_text(tree, tvb, offset, 4,
|
|
"Time-out errors: %u", tvb_get_ntohl(tvb, offset));
|
|
offset += 4;
|
|
|
|
proto_tree_add_text(tree, tvb, offset, 4,
|
|
"Alignment errors: %u", tvb_get_ntohl(tvb, offset));
|
|
}
|
|
|
|
static void
|
|
dissect_set_link(tvbuff_t *tvb, int offset, packet_info *pinfo _U_,
|
|
proto_tree *tree)
|
|
{
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"Peer's call ID: %u", tvb_get_ntohs(tvb, offset));
|
|
offset += 2;
|
|
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"Reserved: %u", tvb_get_ntohs(tvb, offset));
|
|
offset += 2;
|
|
|
|
proto_tree_add_text(tree, tvb, offset, 4,
|
|
"Send ACCM: %#08x", tvb_get_ntohl(tvb, offset));
|
|
offset += 4;
|
|
|
|
proto_tree_add_text(tree, tvb, offset, 4,
|
|
"Recv ACCM: %#08x", tvb_get_ntohl(tvb, offset));
|
|
}
|
|
|
|
void
|
|
proto_register_pptp(void)
|
|
{
|
|
static gint *ett[] = {
|
|
&ett_pptp,
|
|
};
|
|
|
|
static hf_register_info hf[] = {
|
|
{ &hf_pptp_message_type,
|
|
{ "Message type", "pptp.type",
|
|
FT_UINT16, BASE_DEC, VALS(msgtype_vals), 0x0,
|
|
"PPTP message type", HFILL }}
|
|
};
|
|
|
|
proto_pptp = proto_register_protocol("Point-to-Point Tunnelling Protocol",
|
|
"PPTP", "pptp");
|
|
proto_register_field_array(proto_pptp, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
}
|
|
|
|
void
|
|
proto_reg_handoff_pptp(void)
|
|
{
|
|
dissector_handle_t pptp_handle;
|
|
|
|
pptp_handle = create_dissector_handle(dissect_pptp, proto_pptp);
|
|
dissector_add("tcp.port", TCP_PORT_PPTP, pptp_handle);
|
|
data_handle = find_dissector("data");
|
|
}
|