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wireshark/packet-pptp.c

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/* packet-pptp.c
* Routines for the Point-to-Point Tunnelling Protocol (PPTP) (RFC 2637)
* Brad Robel-Forrest <brad.robel-forrest@watchguard.com>
*
* $Id: packet-pptp.c,v 1.13 2000/11/19 08:54:02 guy Exp $
*
* Ethereal - Network traffic analyzer
* By Gerald Combs <gerald@zing.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., 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
#include <stdio.h>
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#include <glib.h>
#include "packet.h"
static int proto_pptp = -1;
static int hf_pptp_message_type = -1;
static gint ett_pptp = -1;
#define TCP_PORT_PPTP 1723
#define MAGIC_COOKIE 0x1A2B3C4D
#define NUM_MSG_TYPES 3
#define msgtype2str(t) \
((t < NUM_MSG_TYPES) ? msgtypestr[t] : "UNKNOWN-MESSAGES-TYPE")
static const char *msgtypestr[NUM_MSG_TYPES] = {
"UNKNOWN-MESSAGE-TYPE",
"CONTROL-MESSAGE",
"MANAGEMENT-MESSAGE"
};
#define NUM_FRAME_TYPES 4
#define frametype2str(t) \
((t < NUM_FRAME_TYPES) ? frametypestr[t] : "UNKNOWN-FRAMING-TYPE")
static const char *frametypestr[NUM_FRAME_TYPES] = {
"UNKNOWN-FRAMING-TYPE",
"ASYNCHRONOUS",
"SYNCHRONOUS",
"EITHER"
};
#define NUM_BEARER_TYPES 4
#define bearertype2str(t) \
((t < NUM_BEARER_TYPES) ? bearertypestr[t] : "UNKNOWN-BEARER-TYPE")
static const char *bearertypestr[NUM_BEARER_TYPES] = {
"UNKNOWN-BEARER-TYPE",
"ANALOG",
"DIGITAL",
"EITHER"
};
#define NUM_CNTRLRESULT_TYPES 6
#define cntrlresulttype2str(t) \
((t < NUM_CNTRLRESULT_TYPES) ? cntrlresulttypestr[t] : "UNKNOWN-CNTRLRESULT-TYPE")
static const char *cntrlresulttypestr[NUM_CNTRLRESULT_TYPES] = {
"UNKNOWN-CNTRLRESULT-TYPE",
"SUCCESS",
"GENERAL-ERROR",
"COMMAND-CHANNEL-EXISTS",
"NOT-AUTHORIZED",
"VERSION-NOT-SUPPORTED"
};
#define NUM_ERROR_TYPES 7
#define errortype2str(t) \
((t < NUM_ERROR_TYPES) ? errortypestr[t] : "UNKNOWN-ERROR-TYPE")
static const char *errortypestr[NUM_ERROR_TYPES] = {
"NONE",
"NOT-CONNECTED",
"BAD-FORMAT",
"BAD-VALUE",
"NO-RESOURCE",
"BAD-CALL-ID",
"PAC-ERROR"
};
#define NUM_REASON_TYPES 4
#define reasontype2str(t) \
((t < NUM_REASON_TYPES) ? reasontypestr[t] : "UNKNOWN-REASON-TYPE")
static const char *reasontypestr[NUM_REASON_TYPES] = {
"UNKNOWN-REASON-TYPE",
"NONE",
"STOP-PROTOCOL",
"STOP-LOCAL-SHUTDOWN"
};
#define NUM_STOPRESULT_TYPES 3
#define stopresulttype2str(t) \
((t < NUM_STOPRESULT_TYPES) ? stopresulttypestr[t] : "UNKNOWN-STOPRESULT-TYPE")
static const char *stopresulttypestr[NUM_STOPRESULT_TYPES] = {
"UNKNOWN-STOPRESULT-TYPE",
"SUCCESS",
"GENERAL-ERROR"
};
#define NUM_ECHORESULT_TYPES 3
#define echoresulttype2str(t) \
((t < NUM_ECHORESULT_TYPES) ? echoresulttypestr[t] : "UNKNOWN-ECHORESULT-TYPE")
static const char *echoresulttypestr[NUM_ECHORESULT_TYPES] = {
"UNKNOWN-ECHORESULT-TYPE",
"SUCCESS",
"GENERAL-ERROR"
};
#define NUM_OUTRESULT_TYPES 8
#define outresulttype2str(t) \
((t < NUM_OUTRESULT_TYPES) ? outresulttypestr[t] : "UNKNOWN-OUTRESULT-TYPE")
static const char *outresulttypestr[NUM_OUTRESULT_TYPES] = {
"UNKNOWN-OUTRESULT-TYPE",
"CONNECTED",
"GENERAL-ERROR",
"NO-CARRIER",
"BUSY",
"NO-DIAL-TONE",
"TIME-OUT",
"DO-NOT-ACCEPT"
};
#define NUM_INRESULT_TYPES 4
#define inresulttype2str(t) \
((t < NUM_INRESULT_TYPES) ? inresulttypestr[t] : "UNKNOWN-INRESULT-TYPE")
static const char *inresulttypestr[NUM_INRESULT_TYPES] = {
"UNKNOWN-INRESULT-TYPE",
"CONNECT",
"GENERAL-ERROR",
"DO-NOT-ACCEPT"
};
#define NUM_DISCRESULT_TYPES 5
#define discresulttype2str(t) \
((t < NUM_DISCRESULT_TYPES) ? discresulttypestr[t] : "UNKNOWN-DISCRESULT-TYPE")
static const char *discresulttypestr[NUM_DISCRESULT_TYPES] = {
"UNKNOWN-DISCRESULT-TYPE",
"LOST-CARRIER",
"GENERAL-ERROR",
"ADMIN-SHUTDOWN",
"REQUEST"
};
static void dissect_unknown(const u_char *, int, frame_data *, proto_tree *);
static void dissect_cntrl_req(const u_char *, int, frame_data *, proto_tree *);
static void dissect_cntrl_reply(const u_char *, int, frame_data *, proto_tree *);
static void dissect_stop_req(const u_char *, int, frame_data *, proto_tree *);
static void dissect_stop_reply(const u_char *, int, frame_data *, proto_tree *);
static void dissect_echo_req(const u_char *, int, frame_data *, proto_tree *);
static void dissect_echo_reply(const u_char *, int, frame_data *, proto_tree *);
static void dissect_out_req(const u_char *, int, frame_data *, proto_tree *);
static void dissect_out_reply(const u_char *, int, frame_data *, proto_tree *);
static void dissect_in_req(const u_char *, int, frame_data *, proto_tree *);
static void dissect_in_reply(const u_char *, int, frame_data *, proto_tree *);
static void dissect_in_connected(const u_char *, int, frame_data *, proto_tree *);
static void dissect_clear_req(const u_char *, int, frame_data *, proto_tree *);
static void dissect_disc_notify(const u_char *, int, frame_data *, proto_tree *);
static void dissect_error_notify(const u_char *, int, frame_data *, proto_tree *);
static void dissect_set_link(const u_char *, int, frame_data *, proto_tree *);
#define NUM_CNTRL_TYPES 16
#define cntrltype2str(t) \
((t < NUM_CNTRL_TYPES) ? strfuncs[t].str : "UNKNOWN-CONTROL-TYPE")
static struct strfunc {
const char * str;
void (*func)(const u_char *, int, frame_data *, proto_tree *);
} strfuncs[NUM_CNTRL_TYPES] = {
{"UNKNOWN-CONTROL-TYPE", dissect_unknown },
{"START-CONTROL-REQUEST", dissect_cntrl_req },
{"START-CONTROL-REPLY", dissect_cntrl_reply },
{"STOP-CONTROL-REQUEST", dissect_stop_req },
{"STOP-CONTROL-REPLY", dissect_stop_reply },
{"ECHO-REQUEST", dissect_echo_req },
{"ECHO-REPLY", dissect_echo_reply },
{"OUTGOING-CALL-REQUEST", dissect_out_req },
{"OUTGOING-CALL-REPLY", dissect_out_reply },
{"INCOMING-CALL-REQUEST", dissect_in_req },
{"INCOMING-CALL-REPLY", dissect_in_reply },
{"INCOMING-CALL-CONNECTED", dissect_in_connected },
{"CLEAR-CALL-REQUEST", dissect_clear_req },
{"DISCONNECT-NOTIFY", dissect_disc_notify },
{"ERROR-NOTIFY", dissect_error_notify },
{"SET-LINK", dissect_set_link }
};
struct pptp_hdr
{
guint16 len;
guint16 type;
guint32 cookie;
guint16 cntrl_type;
guint16 resv;
};
struct cntrl_req
{
guint8 major_ver;
guint8 minor_ver;
guint16 resv;
guint32 frame;
guint32 bearer;
guint16 max_chan;
guint16 firm_rev;
guint8 host[64];
guint8 vendor[64];
};
struct cntrl_reply
{
guint8 major_ver;
guint8 minor_ver;
guint8 result;
guint8 error;
guint32 frame;
guint32 bearer;
guint16 max_chan;
guint16 firm_rev;
guint8 host[64];
guint8 vendor[64];
};
struct stop_req
{
guint8 reason;
guint8 resv0;
guint16 resv1;
};
struct stop_reply
{
guint8 result;
guint8 error;
guint16 resv;
};
struct echo_req
{
guint32 ident;
};
struct echo_reply
{
guint32 ident;
guint8 result;
guint8 error;
guint16 resv;
};
struct out_req
{
guint16 call_id;
guint16 call_serial;
guint32 min_bps;
guint32 max_bps;
guint32 bearer;
guint32 frame;
guint16 win_size;
guint16 delay;
guint16 phone_len;
guint16 resv;
guint8 phone[64];
guint8 subaddr[64];
};
struct out_reply
{
guint16 call_id;
guint16 peer_id;
guint8 result;
guint8 error;
guint16 cause;
guint32 speed;
guint16 win_size;
guint16 delay;
guint32 channel_id;
};
struct in_req
{
guint16 call_id;
guint16 call_serial;
guint32 bearer;
guint32 channel_id;
guint16 dialed_len;
guint16 dialing_len;
guint8 dialed[64];
guint8 dialing[64];
guint8 subaddr[64];
};
struct in_reply
{
guint16 call_id;
guint16 peer_id;
guint8 result;
guint8 error;
guint16 win_size;
guint16 delay;
guint16 resv;
};
struct in_connected
{
guint16 peer_id;
guint16 resv;
guint32 speed;
guint16 win_size;
guint16 delay;
guint32 frame;
};
struct clear_req
{
guint16 call_id;
guint16 resv;
};
struct disc_notify
{
guint16 call_id;
guint8 result;
guint8 error;
guint16 cause;
guint16 resv;
guint8 stats[128];
};
struct error_notify
{
guint16 peer_id;
guint16 resv;
guint32 crc;
guint32 frame;
guint32 hardware;
guint32 buffer;
guint32 timeout;
guint32 alignment;
};
struct set_link
{
guint16 peer_id;
guint16 resv;
guint32 send_acm;
guint32 recv_acm;
};
static void
dissect_pptp(const u_char *pd, int offset, frame_data *fd, proto_tree *tree) {
struct pptp_hdr * hdr = (struct pptp_hdr *)(pd + offset);
guint16 len;
guint16 cntrl_type;
OLD_CHECK_DISPLAY_AS_DATA(proto_pptp, pd, offset, fd, tree);
if (check_col(fd, COL_PROTOCOL))
col_set_str(fd, COL_PROTOCOL, "PPTP");
len = pntohs(&hdr->len);
cntrl_type = pntohs(&hdr->cntrl_type);
if (check_col(fd, COL_INFO))
col_add_fstr(fd, COL_INFO, "%s", cntrltype2str(cntrl_type));
if (IS_DATA_IN_FRAME(offset) && tree) {
guint16 msg_type;
guint32 cookie;
proto_item * ti;
proto_tree * pptp_tree;
ti = proto_tree_add_item(tree, proto_pptp, NullTVB, offset, len, FALSE);
pptp_tree = proto_item_add_subtree(ti, ett_pptp);
proto_tree_add_text(pptp_tree, NullTVB, offset, sizeof(hdr->len),
"Length: %u", len);
offset += sizeof(hdr->len);
msg_type = pntohs(&hdr->type);
proto_tree_add_uint_format(pptp_tree, hf_pptp_message_type, NullTVB,
offset, sizeof(hdr->type),
msg_type,
"Message type: %s (%u)",
msgtype2str(msg_type), msg_type);
offset += sizeof(hdr->type);
cookie = pntohl(&hdr->cookie);
if (cookie == MAGIC_COOKIE)
proto_tree_add_text(pptp_tree, NullTVB, offset, sizeof(hdr->cookie),
"Cookie: %#08x (correct)", cookie);
else
proto_tree_add_text(pptp_tree, NullTVB, offset, sizeof(hdr->cookie),
"Cookie: %#08x (incorrect)", cookie);
offset += sizeof(hdr->cookie);
proto_tree_add_text(pptp_tree, NullTVB, offset, sizeof(hdr->cntrl_type),
"Control type: %s (%u)", cntrltype2str(cntrl_type), cntrl_type);
offset += sizeof(hdr->cntrl_type);
proto_tree_add_text(pptp_tree, NullTVB, offset, sizeof(hdr->resv),
"Reserved: %u", pntohs(&hdr->resv));
offset += sizeof(hdr->resv);
if (cntrl_type < NUM_CNTRL_TYPES)
( *(strfuncs[cntrl_type].func))(pd, offset, fd, pptp_tree);
else
old_dissect_data(pd, offset, fd, pptp_tree);
}
}
static void
dissect_unknown(const u_char *pd, int offset, frame_data *fd, proto_tree *tree) {
old_dissect_data(pd, offset, fd, tree);
}
static void
dissect_cntrl_req(const u_char *pd, int offset, frame_data *fd, proto_tree *tree) {
struct cntrl_req * hdr = (struct cntrl_req *)(pd + offset);
guint32 frame;
guint32 bearer;
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->major_ver) + sizeof(hdr->minor_ver),
"Protocol version: %u.%u", hdr->major_ver, hdr->minor_ver );
offset += sizeof(hdr->major_ver) + sizeof(hdr->minor_ver);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->resv),
"Reserved: %u", pntohs(&hdr->resv));
offset += sizeof(hdr->resv);
frame = pntohl(&hdr->frame);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->frame),
"Framing capabilities: %s (%u)", frametype2str(frame), frame);
offset += sizeof(hdr->frame);
bearer = pntohl(&hdr->bearer);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->bearer),
"Bearer capabilities: %s (%u)", bearertype2str(bearer), bearer);
offset += sizeof(hdr->bearer);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->max_chan),
"Maximum channels: %u", pntohs(&hdr->max_chan));
offset += sizeof(hdr->max_chan);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->firm_rev),
"Firmware revision: %u", pntohs(&hdr->firm_rev));
offset += sizeof(hdr->firm_rev);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->host),
"Hostname: %s", hdr->host);
offset += sizeof(hdr->host);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->vendor),
"Vendor: %s", hdr->vendor);
}
static void
dissect_cntrl_reply(const u_char *pd, int offset, frame_data *fd, proto_tree *tree) {
struct cntrl_reply * hdr = (struct cntrl_reply *)(pd + offset);
guint32 frame;
guint32 bearer;
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->major_ver) + sizeof(hdr->minor_ver),
"Protocol version: %u.%u", hdr->major_ver, hdr->minor_ver );
offset += sizeof(hdr->major_ver) + sizeof(hdr->minor_ver);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->result),
"Result: %s (%u)", cntrlresulttype2str(hdr->result), hdr->result);
offset += sizeof(hdr->result);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->error),
"Error: %s (%u)", errortype2str(hdr->error), hdr->error);
offset += sizeof(hdr->error);
frame = pntohl(&hdr->frame);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->frame),
"Framing capabilities: %s (%u)", frametype2str(frame), frame);
offset += sizeof(hdr->frame);
bearer = pntohl(&hdr->bearer);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->bearer),
"Bearer capabilities: %s (%u)", bearertype2str(bearer), bearer);
offset += sizeof(hdr->bearer);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->max_chan),
"Maximum channels: %u", pntohs(&hdr->max_chan));
offset += sizeof(hdr->max_chan);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->firm_rev),
"Firmware revision: %u", pntohs(&hdr->firm_rev));
offset += sizeof(hdr->firm_rev);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->host),
"Hostname: %s", hdr->host);
offset += sizeof(hdr->host);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->vendor),
"Vendor: %s", hdr->vendor);
}
static void
dissect_stop_req(const u_char *pd, int offset, frame_data *fd, proto_tree *tree) {
struct stop_req * hdr = (struct stop_req *)(pd + offset);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->reason),
"Reason: %s (%u)", reasontype2str(hdr->reason), hdr->reason);
offset += sizeof(hdr->reason);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->resv0),
"Reserved: %u", hdr->resv0);
offset += sizeof(hdr->resv0);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->resv1),
"Reserved: %u", pntohs(&hdr->resv1));
offset += sizeof(hdr->resv1);
}
static void
dissect_stop_reply(const u_char *pd, int offset, frame_data *fd, proto_tree *tree) {
struct stop_reply * hdr = (struct stop_reply *)(pd + offset);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->result),
"Result: %s (%u)", stopresulttype2str(hdr->result), hdr->result);
offset += sizeof(hdr->result);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->error),
"Error: %s (%u)", errortype2str(hdr->error), hdr->error);
offset += sizeof(hdr->error);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->resv),
"Reserved: %u", pntohs(&hdr->resv));
offset += sizeof(hdr->resv);
}
static void
dissect_echo_req(const u_char *pd, int offset, frame_data *fd, proto_tree *tree) {
struct echo_req * hdr = (struct echo_req *)(pd + offset);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->ident),
"Identifier: %u", pntohl(&hdr->ident));
offset += sizeof(hdr->ident);
}
static void
dissect_echo_reply(const u_char *pd, int offset, frame_data *fd, proto_tree *tree) {
struct echo_reply * hdr = (struct echo_reply *)(pd + offset);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->ident),
"Identifier: %u", pntohl(&hdr->ident));
offset += sizeof(hdr->ident);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->result),
"Result: %s (%u)", echoresulttype2str(hdr->result), hdr->result);
offset += sizeof(hdr->result);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->error),
"Error: %s (%u)", errortype2str(hdr->error), hdr->error);
offset += sizeof(hdr->error);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->resv),
"Reserved: %u", pntohs(&hdr->resv));
offset += sizeof(hdr->resv);
}
static void
dissect_out_req(const u_char *pd, int offset, frame_data *fd, proto_tree *tree) {
struct out_req * hdr = (struct out_req *)(pd + offset);
guint32 bearer;
guint32 frame;
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->call_id),
"Call ID: %u", pntohs(&hdr->call_id));
offset += sizeof(hdr->call_id);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->call_serial),
"Call Serial Number: %u", pntohs(&hdr->call_serial));
offset += sizeof(hdr->call_serial);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->min_bps),
"Minimum BPS: %u", pntohl(&hdr->min_bps));
offset += sizeof(hdr->min_bps);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->max_bps),
"Maximum BPS: %u", pntohl(&hdr->max_bps));
offset += sizeof(hdr->max_bps);
bearer = pntohl(&hdr->bearer);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->bearer),
"Bearer capabilities: %s (%u)", bearertype2str(bearer), bearer);
offset += sizeof(hdr->bearer);
frame = pntohl(&hdr->frame);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->frame),
"Framing capabilities: %s (%u)", frametype2str(frame), frame);
offset += sizeof(hdr->frame);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->win_size),
"Receive window size: %u", pntohs(&hdr->win_size));
offset += sizeof(hdr->win_size);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->delay),
"Processing delay: %u", pntohs(&hdr->delay));
offset += sizeof(hdr->delay);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->phone_len),
"Phone number length: %u", pntohs(&hdr->phone_len));
offset += sizeof(hdr->phone_len);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->resv),
"Reserved: %u", pntohs(&hdr->resv));
offset += sizeof(hdr->resv);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->phone),
"Phone number: %s", hdr->phone);
offset += sizeof(hdr->phone);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->subaddr),
"Subaddress: %s", hdr->subaddr);
offset += sizeof(hdr->subaddr);
}
static void
dissect_out_reply(const u_char *pd, int offset, frame_data *fd, proto_tree *tree) {
struct out_reply * hdr = (struct out_reply *)(pd + offset);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->call_id),
"Call ID: %u", pntohs(&hdr->call_id));
offset += sizeof(hdr->call_id);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->peer_id),
"Peer's call ID: %u", pntohs(&hdr->peer_id));
offset += sizeof(hdr->peer_id);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->result),
"Result: %s (%u)", outresulttype2str(hdr->result), hdr->result);
offset += sizeof(hdr->result);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->error),
"Error: %s (%u)", errortype2str(hdr->error), hdr->error);
offset += sizeof(hdr->error);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->cause),
"Cause code: %u", pntohs(&hdr->cause));
offset += sizeof(hdr->cause);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->speed),
"Connect speed: %u", pntohl(&hdr->speed));
offset += sizeof(hdr->speed);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->win_size),
"Receive window size: %u", pntohs(&hdr->win_size));
offset += sizeof(hdr->win_size);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->delay),
"Processing delay: %u", pntohs(&hdr->delay));
offset += sizeof(hdr->delay);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->channel_id),
"Physical channel ID: %u", pntohl(&hdr->channel_id));
offset += sizeof(hdr->channel_id);
}
static void
dissect_in_req(const u_char *pd, int offset, frame_data *fd, proto_tree *tree) {
struct in_req * hdr = (struct in_req *)(pd + offset);
guint32 bearer;
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->call_id),
"Call ID: %u", pntohs(&hdr->call_id));
offset += sizeof(hdr->call_id);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->call_serial),
"Call serial number: %u", pntohs(&hdr->call_serial));
offset += sizeof(hdr->call_serial);
bearer = pntohl(&hdr->bearer);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->bearer),
"Bearer capabilities: %s (%u)", bearertype2str(bearer), bearer);
offset += sizeof(hdr->bearer);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->channel_id),
"Physical channel ID: %u", pntohl(&hdr->channel_id));
offset += sizeof(hdr->channel_id);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->dialed_len),
"Dialed number length: %u", pntohs(&hdr->dialed_len));
offset += sizeof(hdr->dialed_len);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->dialing_len),
"Dialing number length: %u", pntohs(&hdr->dialing_len));
offset += sizeof(hdr->dialing_len);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->dialed),
"Dialed number: %s", hdr->dialed);
offset += sizeof(hdr->dialed);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->dialing),
"Dialing number: %s", hdr->dialing);
offset += sizeof(hdr->dialing);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->subaddr),
"Subaddress: %s", hdr->subaddr);
offset += sizeof(hdr->subaddr);
}
static void
dissect_in_reply(const u_char *pd, int offset, frame_data *fd, proto_tree *tree) {
struct in_reply * hdr = (struct in_reply *)(pd + offset);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->call_id),
"Call ID: %u", pntohs(&hdr->call_id));
offset += sizeof(hdr->call_id);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->peer_id),
"Peer's call ID: %u", pntohs(&hdr->peer_id));
offset += sizeof(hdr->peer_id);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->result),
"Result: %s (%u)", inresulttype2str(hdr->result), hdr->result);
offset += sizeof(hdr->result);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->error),
"Error: %s (%u)", errortype2str(hdr->error), hdr->error);
offset += sizeof(hdr->error);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->win_size),
"Receive window size: %u", pntohs(&hdr->win_size));
offset += sizeof(hdr->win_size);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->delay),
"Processing delay: %u", pntohs(&hdr->delay));
offset += sizeof(hdr->delay);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->resv),
"Reserved: %u", hdr->resv);
offset += sizeof(hdr->resv);
}
static void
dissect_in_connected(const u_char *pd, int offset, frame_data *fd, proto_tree *tree) {
struct in_connected * hdr = (struct in_connected *)(pd + offset);
guint32 frame;
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->peer_id),
"Peer's call ID: %u", pntohs(&hdr->peer_id));
offset += sizeof(hdr->peer_id);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->resv),
"Reserved: %u", pntohs(&hdr->resv));
offset += sizeof(hdr->resv);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->speed),
"Connect speed: %u", pntohl(&hdr->speed));
offset += sizeof(hdr->speed);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->win_size),
"Receive window size: %u", pntohs(&hdr->win_size));
offset += sizeof(hdr->win_size);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->delay),
"Processing delay: %u", pntohs(&hdr->delay));
offset += sizeof(hdr->delay);
frame = pntohl(&hdr->frame);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->frame),
"Framing capabilities: %s (%u)", frametype2str(frame), frame);
offset += sizeof(hdr->frame);
}
static void
dissect_clear_req(const u_char *pd, int offset, frame_data *fd, proto_tree *tree) {
struct clear_req * hdr = (struct clear_req *)(pd + offset);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->call_id),
"Call ID: %u", pntohs(&hdr->call_id));
offset += sizeof(hdr->call_id);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->resv),
"Reserved: %u", pntohs(&hdr->resv));
offset += sizeof(hdr->resv);
}
static void
dissect_disc_notify(const u_char *pd, int offset, frame_data *fd, proto_tree *tree) {
struct disc_notify * hdr = (struct disc_notify *)(pd + offset);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->call_id),
"Call ID: %u", pntohs(&hdr->call_id));
offset += sizeof(hdr->call_id);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->result),
"Result: %s (%u)", discresulttype2str(hdr->result), hdr->result);
offset += sizeof(hdr->result);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->error),
"Error: %s (%u)", errortype2str(hdr->error), hdr->error);
offset += sizeof(hdr->error);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->cause),
"Cause code: %u", pntohs(&hdr->cause));
offset += sizeof(hdr->cause);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->resv),
"Reserved: %u", pntohs(&hdr->resv));
offset += sizeof(hdr->resv);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->stats),
"Call statistics: %s", hdr->stats);
offset += sizeof(hdr->stats);
}
static void
dissect_error_notify(const u_char *pd, int offset, frame_data *fd, proto_tree *tree) {
struct error_notify * hdr = (struct error_notify *)(pd + offset);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->peer_id),
"Peer's call ID: %u", pntohs(&hdr->peer_id));
offset += sizeof(hdr->peer_id);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->resv),
"Reserved: %u", pntohs(&hdr->resv));
offset += sizeof(hdr->resv);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->crc),
"CRC errors: %u", pntohl(&hdr->crc));
offset += sizeof(hdr->crc);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->frame),
"Framing errors: %u", pntohl(&hdr->frame));
offset += sizeof(hdr->frame);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->hardware),
"Hardware overruns: %u", pntohl(&hdr->hardware));
offset += sizeof(hdr->hardware);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->buffer),
"Buffer overruns: %u", pntohl(&hdr->buffer));
offset += sizeof(hdr->buffer);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->timeout),
"Time-out errors: %u", pntohl(&hdr->timeout));
offset += sizeof(hdr->timeout);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->alignment),
"Alignment errors: %u", pntohl(&hdr->alignment));
offset += sizeof(hdr->alignment);
}
static void
dissect_set_link(const u_char *pd, int offset, frame_data *fd, proto_tree *tree) {
struct set_link * hdr = (struct set_link *)(pd + offset);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->peer_id),
"Peer's call ID: %u", pntohs(&hdr->peer_id));
offset += sizeof(hdr->peer_id);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->resv),
"Reserved: %u", pntohs(&hdr->resv));
offset += sizeof(hdr->resv);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->send_acm),
"Send ACCM: %#08x", pntohl(&hdr->send_acm));
offset += sizeof(hdr->send_acm);
proto_tree_add_text(tree, NullTVB, offset, sizeof(hdr->recv_acm),
"Recv ACCM: %#08x", pntohl(&hdr->recv_acm));
offset += sizeof(hdr->recv_acm);
}
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_HEX, NULL, 0x0,
"PPTP message type" }}
};
proto_pptp = proto_register_protocol("Point-to-Point Tunnelling Protocol",
"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)
{
old_dissector_add("tcp.port", TCP_PORT_PPTP, dissect_pptp);
}
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