forked from osmocom/wireshark
922 lines
29 KiB
C
922 lines
29 KiB
C
/* packet-sametime.c
|
|
* Routines for SAMETIME dissection
|
|
* Copyright 2010, Toralf Foerster <toralf.foerster [AT] gmx.de>
|
|
*
|
|
* Wireshark - Network traffic analyzer
|
|
* By Gerald Combs <gerald@wireshark.org>
|
|
* Copyright 1998 Gerald Combs
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0-or-later
|
|
*/
|
|
|
|
#include "config.h"
|
|
|
|
#include <epan/packet.h>
|
|
#include <epan/prefs.h>
|
|
#include <epan/stats_tree.h>
|
|
#include "packet-tcp.h"
|
|
|
|
#define DEFAULT_SAMETIME_PORT 1533 /* Not IANA registered */
|
|
|
|
void proto_register_sametime(void);
|
|
void proto_reg_handoff_sametime(void);
|
|
|
|
static int proto_sametime = -1;
|
|
static dissector_handle_t sametime_handle;
|
|
|
|
/*preferences*/
|
|
static gboolean global_sametime_show_length = FALSE;
|
|
static gboolean global_sametime_reassemble_packets = TRUE;
|
|
|
|
/*heart beat*/
|
|
static int hf_sametime_heartbeat = -1;
|
|
|
|
/*sametime message header*/
|
|
static int hf_sametime_message_length = -1;
|
|
static int hf_sametime_message_type = -1;
|
|
static int hf_sametime_message_options = -1;
|
|
static int hf_sametime_message_options_attribute = -1;
|
|
static int hf_sametime_message_options_encrypted = -1;
|
|
static int hf_sametime_message_channel = -1;
|
|
|
|
/*common types*/
|
|
static int hf_sametime_field_length = -1;
|
|
static int hf_sametime_field_text = -1;
|
|
static int hf_sametime_code = -1;
|
|
static int hf_sametime_login_type = -1;
|
|
static int hf_sametime_time = -1;
|
|
|
|
/*handshake*/
|
|
static int hf_sametime_handshake_major = -1;
|
|
static int hf_sametime_handshake_minor = -1;
|
|
static int hf_sametime_handshake_srvrcalc_addr = -1;
|
|
static int hf_sametime_handshake_loclcalc_addr = -1;
|
|
|
|
/*channel*/
|
|
static int hf_sametime_channel_service = -1;
|
|
static int hf_sametime_channel_id = -1;
|
|
static int hf_sametime_channel_send_type = -1;
|
|
static int hf_sametime_channel_awareness = -1;
|
|
|
|
/*user status*/
|
|
static int hf_sametime_user_status = -1;
|
|
|
|
/*location*/
|
|
static int hf_sametime_location_country = -1;
|
|
static int hf_sametime_location_postalcode = -1;
|
|
static int hf_sametime_location_province = -1;
|
|
static int hf_sametime_location_city = -1;
|
|
static int hf_sametime_location_phone = -1;
|
|
static int hf_sametime_location_name = -1;
|
|
static int hf_sametime_location_timezone = -1;
|
|
|
|
/*packet detail tree*/
|
|
static gint ett_sametime = -1;
|
|
static gint ett_sametime_options = -1;
|
|
|
|
/*statistics*/
|
|
static int sametime_tap = -1;
|
|
static const guint8* st_str_packet = "Sametime Message Count";
|
|
static const guint8* st_str_message_type = "Message Type";
|
|
static const guint8* st_str_send_type = "Send Type";
|
|
static const guint8* st_str_user_status = "User Status";
|
|
static int st_node_packet = -1;
|
|
static int st_node_message_type = -1;
|
|
static int st_node_send_type = -1;
|
|
static int st_node_user_status = -1;
|
|
|
|
typedef struct SametimeTap {
|
|
gint message_type;
|
|
gint send_type;
|
|
gint user_status;
|
|
} SametimeTap;
|
|
|
|
#define SAMETIME_MESSAGETYPE_HEARTBEAT 0x80
|
|
#define SAMETIME_MESSAGETYPE_HANDSHAKE 0x0000
|
|
|
|
#define SAMETIME_MESSAGETYPE_HANDSHAKE_ACK 0x8000
|
|
#define SAMETIME_MESSAGETYPE_HANDSHAKE_SYN 0x0025
|
|
#define SAMETIME_MESSAGETYPE_LOGIN 0x0001
|
|
#define SAMETIME_MESSAGETYPE_LOGIN_ACK 0x8001
|
|
#define SAMETIME_MESSAGETYPE_LOGIN_REDIRECT 0x0018
|
|
#define SAMETIME_MESSAGETYPE_LOGIN_CONTINUE 0x0016
|
|
|
|
#define SAMETIME_MESSAGETYPE_CHANNEL_CREATE 0x0002
|
|
#define SAMETIME_MESSAGETYPE_CHANNEL_DESTROY 0x0003
|
|
#define SAMETIME_MESSAGETYPE_CHANNEL_SEND 0x0004
|
|
#define SAMETIME_MESSAGETYPE_CHANNEL_ACCEPT 0x0006
|
|
|
|
#define SAMETIME_MESSAGETYPE_SET_USER_STATUS 0x0009
|
|
#define SAMETIME_MESSAGETYPE_SET_PRIVACY_LIST 0x000b
|
|
#define SAMETIME_MESSAGETYPE_SENSE_SERVICE 0x0011
|
|
#define SAMETIME_MESSAGETYPE_ADMIN 0x0019
|
|
#define SAMETIME_MESSAGETYPE_ANNOUNCE 0x0022
|
|
|
|
|
|
static const value_string messagetypenames[] = {
|
|
{ SAMETIME_MESSAGETYPE_HEARTBEAT, "HEARTBEAT" },
|
|
|
|
{ SAMETIME_MESSAGETYPE_HANDSHAKE, "HANDSHAKE" },
|
|
{ SAMETIME_MESSAGETYPE_HANDSHAKE_SYN, "HANDSHAKE_SYN" },
|
|
{ SAMETIME_MESSAGETYPE_HANDSHAKE_ACK, "HANDSHAKE_ACK" },
|
|
{ SAMETIME_MESSAGETYPE_LOGIN, "LOGIN" },
|
|
{ SAMETIME_MESSAGETYPE_LOGIN_ACK, "LOGIN_ACK" },
|
|
{ SAMETIME_MESSAGETYPE_LOGIN_REDIRECT, "LOGIN_REDIRECT" },
|
|
{ SAMETIME_MESSAGETYPE_LOGIN_CONTINUE, "LOGIN_CONTINUE" },
|
|
|
|
{ SAMETIME_MESSAGETYPE_CHANNEL_CREATE, "CHANNEL_CREATE" },
|
|
{ SAMETIME_MESSAGETYPE_CHANNEL_DESTROY, "CHANNEL_DESTROY" },
|
|
{ SAMETIME_MESSAGETYPE_CHANNEL_SEND, "CHANNEL_SEND" },
|
|
{ SAMETIME_MESSAGETYPE_CHANNEL_ACCEPT, "CHANNEL_ACCEPT" },
|
|
|
|
{ SAMETIME_MESSAGETYPE_SET_USER_STATUS, "SET_USER_STATUS" },
|
|
{ SAMETIME_MESSAGETYPE_SET_PRIVACY_LIST, "SET_PRIVACY_LIST" },
|
|
{ SAMETIME_MESSAGETYPE_SENSE_SERVICE, "SENSE_SERVICE" },
|
|
{ SAMETIME_MESSAGETYPE_ADMIN, "ADMIN" },
|
|
{ SAMETIME_MESSAGETYPE_ANNOUNCE, "ANNOUNCE" },
|
|
|
|
{ 0, NULL }
|
|
};
|
|
|
|
#define SAMETIME_MESSAGEOPTION_ENCRYPT 0x4000
|
|
#define SAMETIME_MESSAGEOPTION_HAS_ATTRIBS 0x8000
|
|
|
|
static const value_string optionnames[] = {
|
|
{ 0x0, "" },
|
|
{ SAMETIME_MESSAGEOPTION_ENCRYPT, "ENCRYPT" },
|
|
{ SAMETIME_MESSAGEOPTION_HAS_ATTRIBS, "HAS_ATTRIBS" },
|
|
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const value_string userstatusnames[] = {
|
|
{ 0x0020, "ACTIVE" }, /* "I am available" */
|
|
{ 0x0040, "IDLE" }, /* never seen in the wild, maybe non-pc :-) ? */
|
|
{ 0x0060, "AWAY" }, /* "I am away from my computer now" */
|
|
{ 0x0080, "BUSY" }, /* "Please do not disturb me" */
|
|
{ 0x0008, "MEETING" }, /* "I am in a meeting" */
|
|
|
|
{ 0, NULL }
|
|
};
|
|
|
|
#define SAMETIME_SENDTYPE_AWARE_ADD 0x0068
|
|
#define SAMETIME_SENDTYPE_OPT_DO_SET 0x00c9
|
|
#define SAMETIME_SENDTYPE_AWARE_SNAPSHOT 0x01f4
|
|
#define SAMETIME_SENDTYPE_AWARE_UPDATE 0x01f5
|
|
#define SAMETIME_SENDTYPE_OPT_GOT_SET 0x0259
|
|
|
|
static const value_string sendtypenames[] = {
|
|
{ SAMETIME_SENDTYPE_AWARE_ADD, "AWARE_ADD" },
|
|
{ 0x0069, "AWARE_REMOVE" },
|
|
{ SAMETIME_SENDTYPE_OPT_DO_SET, "OPT_DO_SET" },
|
|
{ 0x00cb, "OPT_WATCH" },
|
|
{ SAMETIME_SENDTYPE_AWARE_SNAPSHOT, "AWARE_SNAPSHOT" },
|
|
{ SAMETIME_SENDTYPE_AWARE_UPDATE, "AWARE_UPDATE" },
|
|
{ SAMETIME_SENDTYPE_OPT_GOT_SET, "OPT_GOT_SET" },
|
|
{ 0x025a, "?" },
|
|
{ 0x025d, "OPT_DID_SET" },
|
|
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const value_string awarenessnames[] = {
|
|
{ 0x0002, "USER" },
|
|
{ 0x0003, "GROUP" },
|
|
{ 0x0008, "SERVER" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const value_string codenames[] = {
|
|
{ 0x00000011, "SERVICE_AWARE" },
|
|
{ 0x00000015, "SERVICE_RESOLVE" },
|
|
{ 0x00000018, "SERVICE_STORAGE" },
|
|
{ 0x0000001a, "SERVICE_DIRECTORY" },
|
|
|
|
{ 0x80000011, "ERR_USER_SKETCHY" },
|
|
{ 0x80000015, "ERR_TOKEN_INVALID" },
|
|
{ 0x80000018, "ERR_PORT_IN_USE" },
|
|
{ 0x80000022, "ERR_CHANNEL_DESTROYED" },
|
|
|
|
{ 0, NULL }
|
|
};
|
|
|
|
|
|
static int
|
|
add_text_item(tvbuff_t *tvb, proto_tree *tree, int offset, int hf)
|
|
{
|
|
guint16 length;
|
|
|
|
/* heuristic rule, string should start w/ valid character(s) */
|
|
if (! tvb_get_guint8(tvb, offset + 2))
|
|
return 0;
|
|
|
|
length = tvb_get_ntohs(tvb, offset);
|
|
if (length) {
|
|
/* the string length must not exceed the packet length */
|
|
if (length > tvb_reported_length_remaining(tvb, offset + 2))
|
|
return 0;
|
|
|
|
/* add string length only if preferences is set */
|
|
if (global_sametime_show_length)
|
|
proto_tree_add_item(tree, hf_sametime_field_length, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
|
|
/* add string */
|
|
proto_tree_add_item(tree, hf, tvb, offset + 2, length, ENC_ASCII|ENC_NA);
|
|
}
|
|
|
|
return 2 + length;
|
|
}
|
|
|
|
|
|
static guint16
|
|
dissect_set_user_status(tvbuff_t *tvb, proto_tree *tree, int offset)
|
|
{
|
|
guint16 user_status;
|
|
|
|
user_status = tvb_get_ntohs(tvb, offset);
|
|
proto_item_append_text(tree, ", %s", val_to_str(user_status, userstatusnames, "0x%04x"));
|
|
proto_tree_add_item(tree, hf_sametime_user_status, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
offset += 2;
|
|
proto_tree_add_item(tree, hf_sametime_time, tvb, offset, 4, ENC_BIG_ENDIAN);
|
|
offset += 4;
|
|
add_text_item(tvb, tree, offset, hf_sametime_field_text);
|
|
|
|
return user_status;
|
|
}
|
|
|
|
|
|
static int
|
|
dissect_handshake(tvbuff_t *tvb, proto_tree *tree, int offset)
|
|
{
|
|
proto_tree_add_item(tree, hf_sametime_handshake_major, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
offset += 2;
|
|
proto_tree_add_item(tree, hf_sametime_handshake_minor, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
offset += 2;
|
|
offset += 4;
|
|
proto_tree_add_item(tree, hf_sametime_handshake_srvrcalc_addr, tvb, offset, 4, ENC_BIG_ENDIAN);
|
|
offset += 4;
|
|
proto_tree_add_item(tree, hf_sametime_login_type, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
offset += 2;
|
|
proto_tree_add_item(tree, hf_sametime_handshake_loclcalc_addr, tvb, offset, 4, ENC_BIG_ENDIAN);
|
|
offset += 4;
|
|
offset += 6;
|
|
offset += add_text_item(tvb, tree, offset, hf_sametime_field_text);
|
|
offset += 8;
|
|
offset += add_text_item(tvb, tree, offset, hf_sametime_field_text);
|
|
|
|
return offset;
|
|
}
|
|
|
|
|
|
static void
|
|
dissect_handshake_ack(tvbuff_t *tvb, proto_tree *tree, int offset)
|
|
{
|
|
proto_tree_add_item(tree, hf_sametime_handshake_major, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
offset += 2;
|
|
proto_tree_add_item(tree, hf_sametime_handshake_minor, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
offset += 2;
|
|
proto_tree_add_item(tree, hf_sametime_handshake_loclcalc_addr, tvb, offset, 4, ENC_BIG_ENDIAN);
|
|
offset += 4;
|
|
offset += 4;
|
|
offset += 4;
|
|
add_text_item(tvb, tree, offset, hf_sametime_field_text);
|
|
}
|
|
|
|
|
|
static void
|
|
dissect_login(tvbuff_t *tvb, proto_tree *tree, int offset)
|
|
{
|
|
offset += 2;
|
|
add_text_item(tvb, tree, offset, hf_sametime_field_text);
|
|
}
|
|
|
|
|
|
static void
|
|
dissect_login_redirect(tvbuff_t *tvb, proto_tree *tree, int offset)
|
|
{
|
|
offset += 2;
|
|
add_text_item(tvb, tree, offset, hf_sametime_field_text);
|
|
}
|
|
|
|
|
|
static void
|
|
dissect_login_ack(tvbuff_t *tvb, proto_tree *tree, int offset)
|
|
{
|
|
offset += add_text_item(tvb, tree, offset, hf_sametime_field_text);
|
|
proto_tree_add_item(tree, hf_sametime_login_type, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
offset += 2;
|
|
offset += add_text_item(tvb, tree, offset, hf_sametime_field_text);
|
|
offset += add_text_item(tvb, tree, offset, hf_sametime_field_text);
|
|
offset += 3;
|
|
offset += add_text_item(tvb, tree, offset, hf_sametime_field_text);
|
|
proto_tree_add_item(tree, hf_sametime_handshake_loclcalc_addr, tvb, offset, 4, ENC_BIG_ENDIAN);
|
|
offset += 4;
|
|
offset += add_text_item(tvb, tree, offset, hf_sametime_field_text);
|
|
offset += 21;
|
|
offset += add_text_item(tvb, tree, offset, hf_sametime_field_text);
|
|
add_text_item(tvb, tree, offset, hf_sametime_field_text);
|
|
}
|
|
|
|
|
|
static void
|
|
dissect_channel_create(tvbuff_t *tvb, proto_tree *tree, int offset)
|
|
{
|
|
offset += 4;
|
|
proto_tree_add_item(tree, hf_sametime_channel_id, tvb, offset, 4, ENC_BIG_ENDIAN);
|
|
offset += 4;
|
|
offset += add_text_item(tvb, tree, offset, hf_sametime_field_text);
|
|
proto_tree_add_item(tree, hf_sametime_channel_service, tvb, offset, 4, ENC_BIG_ENDIAN);
|
|
offset += 4;
|
|
offset += 8;
|
|
add_text_item(tvb, tree, offset, hf_sametime_field_text);
|
|
}
|
|
|
|
|
|
static guint16
|
|
dissect_channel_send(tvbuff_t *tvb, proto_tree *tree, int offset)
|
|
{
|
|
guint16 send_type, awareness;
|
|
guint na;
|
|
|
|
send_type = tvb_get_ntohs(tvb, offset);
|
|
proto_item_append_text(tree, ", %s", val_to_str(send_type, sendtypenames, "0x%04x"));
|
|
proto_tree_add_item(tree, hf_sametime_channel_send_type, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
offset += 2;
|
|
|
|
switch (send_type) {
|
|
case SAMETIME_SENDTYPE_AWARE_ADD:
|
|
offset += 8;
|
|
awareness = tvb_get_ntohs(tvb, offset);
|
|
proto_item_append_text(tree, ", %s", val_to_str(awareness, awarenessnames, "0x%04x"));
|
|
proto_tree_add_item(tree, hf_sametime_channel_awareness, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
offset += 2;
|
|
add_text_item(tvb, tree, offset, hf_sametime_field_text);
|
|
|
|
break;
|
|
|
|
case SAMETIME_SENDTYPE_OPT_DO_SET:
|
|
offset += 20;
|
|
na = tvb_get_ntohl(tvb, offset);
|
|
offset += 4;
|
|
if (na == 0x33) {
|
|
offset += add_text_item(tvb, tree, offset, hf_sametime_location_country);
|
|
offset += add_text_item(tvb, tree, offset, hf_sametime_location_postalcode);
|
|
offset += add_text_item(tvb, tree, offset, hf_sametime_location_province);
|
|
offset += add_text_item(tvb, tree, offset, hf_sametime_location_city);
|
|
offset += add_text_item(tvb, tree, offset, hf_sametime_location_phone);
|
|
offset += 1;
|
|
offset += add_text_item(tvb, tree, offset, hf_sametime_location_name);
|
|
add_text_item(tvb, tree, offset, hf_sametime_location_timezone);
|
|
} else {
|
|
add_text_item(tvb, tree, offset, hf_sametime_field_text);
|
|
}
|
|
|
|
break;
|
|
|
|
case SAMETIME_SENDTYPE_OPT_GOT_SET:
|
|
offset += 8;
|
|
awareness = tvb_get_ntohs(tvb, offset);
|
|
proto_item_append_text(tree, ", %s", val_to_str(awareness, awarenessnames, "0x%04x"));
|
|
proto_tree_add_item(tree, hf_sametime_channel_awareness, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
offset += 2;
|
|
while (tvb_reported_length_remaining(tvb, offset) > 2) {
|
|
int n = add_text_item(tvb, tree, offset, hf_sametime_field_text);
|
|
offset += (n) ? n : 1;
|
|
}
|
|
|
|
break;
|
|
|
|
case SAMETIME_SENDTYPE_AWARE_SNAPSHOT:
|
|
offset += 12;
|
|
awareness = tvb_get_ntohs(tvb, offset);
|
|
proto_item_append_text(tree, ", %s", val_to_str(awareness, awarenessnames, "0x%04x"));
|
|
proto_tree_add_item(tree, hf_sametime_channel_awareness, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
offset += 2;
|
|
add_text_item(tvb, tree, offset, hf_sametime_field_text);
|
|
|
|
break;
|
|
|
|
case SAMETIME_SENDTYPE_AWARE_UPDATE:
|
|
offset += 4;
|
|
offset += 4;
|
|
awareness = tvb_get_ntohs(tvb, offset);
|
|
proto_item_append_text(tree, ", %s", val_to_str(awareness, awarenessnames, "0x%04x"));
|
|
proto_tree_add_item(tree, hf_sametime_channel_awareness, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
offset += 2;
|
|
offset += add_text_item(tvb, tree, offset, hf_sametime_field_text);
|
|
offset += 4;
|
|
if (tvb_get_guint8(tvb, offset)) {
|
|
offset += 1;
|
|
offset += add_text_item(tvb, tree, offset, hf_sametime_field_text);
|
|
dissect_set_user_status(tvb, tree, offset);
|
|
}
|
|
|
|
break;
|
|
|
|
case 0x0000:
|
|
offset += 14;
|
|
add_text_item(tvb, tree, offset, hf_sametime_field_text);
|
|
|
|
break;
|
|
|
|
case 0x0002:
|
|
offset += 8;
|
|
offset += add_text_item(tvb, tree, offset, hf_sametime_field_text);
|
|
offset += 3;
|
|
add_text_item(tvb, tree, offset, hf_sametime_field_text);
|
|
|
|
break;
|
|
|
|
case 0x0005: /* XML */
|
|
if (26 <= tvb_reported_length_remaining(tvb, offset + 2)) {
|
|
offset += 26;
|
|
add_text_item(tvb, tree, offset, hf_sametime_field_text);
|
|
}
|
|
|
|
break;
|
|
|
|
case 0x0007:
|
|
offset += 8;
|
|
if (4 <= tvb_reported_length_remaining(tvb, offset + 2)) {
|
|
offset += add_text_item(tvb, tree, offset, hf_sametime_field_text);
|
|
offset += add_text_item(tvb, tree, offset, hf_sametime_field_text);
|
|
offset += 3;
|
|
offset += add_text_item(tvb, tree, offset, hf_sametime_field_text);
|
|
add_text_item(tvb, tree, offset, hf_sametime_field_text);
|
|
}
|
|
|
|
break;
|
|
|
|
case 0x025a:
|
|
offset += 10;
|
|
add_text_item(tvb, tree, offset, hf_sametime_field_text);
|
|
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return send_type;
|
|
}
|
|
|
|
|
|
static void
|
|
dissect_channel_accept(tvbuff_t *tvb, proto_tree *tree, int offset)
|
|
{
|
|
offset += 34;
|
|
if (tvb_reported_length_remaining(tvb, offset + 2)) {
|
|
offset += add_text_item(tvb, tree, offset, hf_sametime_field_text);
|
|
if (tvb_get_guint8(tvb, offset)) {
|
|
offset += 1;
|
|
offset += add_text_item(tvb, tree, offset, hf_sametime_field_text);
|
|
dissect_set_user_status(tvb, tree, offset);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
static void
|
|
dissect_sense_service(tvbuff_t *tvb, proto_tree *tree, int offset)
|
|
{
|
|
guint32 code;
|
|
|
|
code = tvb_get_ntohl(tvb, offset);
|
|
proto_item_append_text(tree, ", %s", val_to_str(code, codenames, "0x%04x"));
|
|
proto_tree_add_item(tree, hf_sametime_code, tvb, offset, 4, ENC_BIG_ENDIAN);
|
|
}
|
|
|
|
|
|
/*
|
|
here we really dissect the message(s)
|
|
*/
|
|
static int
|
|
dissect_sametime_content(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
|
|
{
|
|
proto_tree *sametime_tree;
|
|
proto_item *ti;
|
|
static SametimeTap *sinfo;
|
|
gint message_type;
|
|
int packet_length, offset = 0;
|
|
|
|
/* we expect either 1 heartbeat byte (0x80) or a sametime message */
|
|
packet_length = tvb_reported_length_remaining(tvb, offset);
|
|
if (packet_length == 1) {
|
|
message_type = tvb_get_guint8(tvb, 0);
|
|
|
|
} else if (packet_length < 12) {
|
|
message_type = -1;
|
|
|
|
} else {
|
|
message_type = tvb_get_ntohs(tvb, 4);
|
|
}
|
|
|
|
/* add message type */
|
|
col_append_str(pinfo->cinfo, COL_INFO, val_to_str(message_type, messagetypenames, "0x%04x"));
|
|
col_append_str(pinfo->cinfo, COL_INFO, " ");
|
|
|
|
/* message type statistic */
|
|
sinfo = wmem_new(pinfo->pool, struct SametimeTap);
|
|
sinfo->message_type = message_type;
|
|
sinfo->send_type = -1;
|
|
sinfo->user_status = -1;
|
|
|
|
/* packet detail tree */
|
|
ti = proto_tree_add_item(tree, proto_sametime, tvb, offset, -1, ENC_NA);
|
|
sametime_tree = proto_item_add_subtree(ti, ett_sametime);
|
|
proto_item_append_text(sametime_tree, ", %s", val_to_str(message_type, messagetypenames, "0x%04x"));
|
|
|
|
/* dissect message */
|
|
if (message_type == SAMETIME_MESSAGETYPE_HEARTBEAT) {
|
|
proto_tree_add_item(sametime_tree, hf_sametime_heartbeat, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
|
|
} else if (message_type != -1) {
|
|
proto_tree *options_tree;
|
|
proto_item *op;
|
|
|
|
/* first 4 bytes gives the length of the sametime message */
|
|
if (global_sametime_show_length) {
|
|
proto_tree_add_item(sametime_tree, hf_sametime_message_length, tvb, offset, 4, ENC_BIG_ENDIAN);
|
|
}
|
|
offset += 4;
|
|
|
|
/* next 2 bytes gives the message type */
|
|
proto_tree_add_item(sametime_tree, hf_sametime_message_type, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
offset += 2;
|
|
|
|
/* next 2 bytes are the message options */
|
|
op = proto_tree_add_item(sametime_tree, hf_sametime_message_options, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
options_tree = proto_item_add_subtree(op, ett_sametime_options);
|
|
proto_tree_add_item(options_tree, hf_sametime_message_options_attribute, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(options_tree, hf_sametime_message_options_encrypted, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
offset += 2;
|
|
|
|
/* next 4 bytes contains the channel id */
|
|
proto_tree_add_item(sametime_tree, hf_sametime_message_channel, tvb, offset, 4, ENC_BIG_ENDIAN);
|
|
offset += 4;
|
|
|
|
switch (message_type)
|
|
{
|
|
case SAMETIME_MESSAGETYPE_HANDSHAKE:
|
|
dissect_handshake(tvb, sametime_tree, offset);
|
|
break;
|
|
|
|
case SAMETIME_MESSAGETYPE_HANDSHAKE_ACK:
|
|
dissect_handshake_ack(tvb, sametime_tree, offset);
|
|
break;
|
|
|
|
case SAMETIME_MESSAGETYPE_HANDSHAKE_SYN:
|
|
break;
|
|
|
|
case SAMETIME_MESSAGETYPE_LOGIN:
|
|
dissect_login(tvb, sametime_tree, offset);
|
|
break;
|
|
|
|
case SAMETIME_MESSAGETYPE_LOGIN_REDIRECT:
|
|
dissect_login_redirect(tvb, sametime_tree, offset);
|
|
break;
|
|
|
|
case SAMETIME_MESSAGETYPE_LOGIN_ACK:
|
|
dissect_login_ack(tvb, sametime_tree, offset);
|
|
break;
|
|
|
|
case SAMETIME_MESSAGETYPE_CHANNEL_CREATE:
|
|
dissect_channel_create(tvb, sametime_tree, offset);
|
|
break;
|
|
|
|
case SAMETIME_MESSAGETYPE_CHANNEL_SEND:
|
|
sinfo->send_type = dissect_channel_send(tvb, sametime_tree, offset);
|
|
break;
|
|
|
|
case SAMETIME_MESSAGETYPE_CHANNEL_ACCEPT:
|
|
dissect_channel_accept(tvb, sametime_tree, offset);
|
|
break;
|
|
|
|
case SAMETIME_MESSAGETYPE_SET_USER_STATUS:
|
|
sinfo->user_status = dissect_set_user_status(tvb, sametime_tree, offset);
|
|
break;
|
|
|
|
case SAMETIME_MESSAGETYPE_SENSE_SERVICE:
|
|
dissect_sense_service(tvb, sametime_tree, offset);
|
|
break;
|
|
|
|
default:
|
|
/* do not fill the statistics with useless data from encrypted packages */
|
|
sinfo->message_type = -1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
tap_queue_packet(sametime_tap, pinfo, sinfo);
|
|
return tvb_captured_length(tvb);
|
|
}
|
|
|
|
|
|
/*
|
|
tick statistics
|
|
*/
|
|
static tap_packet_status
|
|
sametime_stats_tree_packet(stats_tree* st, packet_info* pinfo _U_, epan_dissect_t* edt _U_, const void* p, tap_flags_t flags _U_)
|
|
{
|
|
const struct SametimeTap *pi = (const struct SametimeTap *)p;
|
|
|
|
tick_stat_node(st, st_str_packet, 0, FALSE);
|
|
if (pi->message_type != -1)
|
|
stats_tree_tick_pivot(st, st_node_message_type, val_to_str(pi->message_type, messagetypenames, "Unknown (0x%04x)"));
|
|
|
|
if (pi->send_type != -1)
|
|
stats_tree_tick_pivot(st, st_node_send_type, val_to_str(pi->send_type, sendtypenames, "Unknown (0x%04x)"));
|
|
|
|
if (pi->user_status != -1)
|
|
stats_tree_tick_pivot(st, st_node_user_status, val_to_str(pi->user_status, userstatusnames, "Unknown (0x%04x)"));
|
|
|
|
return TAP_PACKET_REDRAW;
|
|
}
|
|
|
|
|
|
/*
|
|
init statistic
|
|
*/
|
|
static void
|
|
sametime_stats_tree_init(stats_tree* st)
|
|
{
|
|
st_node_packet = stats_tree_create_node(st, st_str_packet, 0, STAT_DT_INT, TRUE);
|
|
st_node_message_type = stats_tree_create_pivot(st, st_str_message_type, st_node_packet);
|
|
st_node_send_type = stats_tree_create_pivot(st, st_str_send_type, st_node_packet);
|
|
st_node_user_status = stats_tree_create_pivot(st, st_str_user_status, st_node_packet);
|
|
}
|
|
|
|
|
|
/*
|
|
length of the sametime message
|
|
*/
|
|
static guint
|
|
get_sametime_message_len(packet_info *pinfo _U_, tvbuff_t *tvb,
|
|
int offset, void *data _U_)
|
|
{
|
|
/* XXX: Actually: the length of the tvb will always be 4 or greater at this point */
|
|
/* because tcp_dissect_pdus was called with 4 as a required "fixed length". */
|
|
/* But newer variants of this protocol with a full encrypted network stream */
|
|
/* may require a more sophisticated dissection logic here */
|
|
guint32 N = tvb_captured_length_remaining(tvb, offset);
|
|
|
|
return (N < 4) ? N : tvb_get_ntohl(tvb, offset) + 4;
|
|
}
|
|
|
|
|
|
/*
|
|
the dissector itself
|
|
*/
|
|
static int
|
|
dissect_sametime(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data)
|
|
{
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "SAMETIME");
|
|
col_clear(pinfo->cinfo,COL_INFO);
|
|
|
|
tcp_dissect_pdus(tvb, pinfo, tree, global_sametime_reassemble_packets, 4,
|
|
get_sametime_message_len, dissect_sametime_content, data);
|
|
return tvb_captured_length(tvb);
|
|
}
|
|
|
|
|
|
void
|
|
proto_register_sametime(void)
|
|
{
|
|
static hf_register_info hf[] = {
|
|
/*tcp payload is one byte : SAMETIME_MESSAGETYPE_HEARTBEAT*/
|
|
{ &hf_sametime_heartbeat,
|
|
{ "heartbeat", "sametime.heartbeat",
|
|
FT_UINT8, BASE_HEX,
|
|
NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
|
|
/*sametime message header*/
|
|
{ &hf_sametime_message_length,
|
|
{ "msg length", "sametime.message_length",
|
|
FT_UINT32, BASE_DEC,
|
|
NULL, 0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_sametime_message_type,
|
|
{ "msg type", "sametime.message_type",
|
|
FT_UINT16, BASE_HEX,
|
|
VALS(messagetypenames), 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_sametime_message_options,
|
|
{ "msg options", "sametime.message_options",
|
|
FT_UINT16, BASE_HEX,
|
|
VALS(optionnames), 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_sametime_message_options_encrypted,
|
|
{ "ENCRYPT", "sametime.message_options.encrypted",
|
|
FT_BOOLEAN, 16,
|
|
NULL, SAMETIME_MESSAGEOPTION_ENCRYPT,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_sametime_message_options_attribute,
|
|
{ "HAS_ATTRIBS", "sametime.message_options.attribute",
|
|
FT_BOOLEAN, 16,
|
|
NULL, SAMETIME_MESSAGEOPTION_HAS_ATTRIBS,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_sametime_message_channel,
|
|
{ "msg channel", "sametime.message_channel",
|
|
FT_UINT32, BASE_DEC,
|
|
NULL, 0,
|
|
NULL, HFILL }
|
|
},
|
|
|
|
/*common fields within various message types*/
|
|
{ &hf_sametime_field_length,
|
|
{ "length", "sametime.field_length",
|
|
FT_UINT16, BASE_DEC,
|
|
NULL, 0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_sametime_field_text,
|
|
{ "text", "sametime.field_text",
|
|
FT_STRING, BASE_NONE,
|
|
NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_sametime_code,
|
|
{ "code", "sametime.code",
|
|
FT_UINT32, BASE_HEX,
|
|
VALS(codenames), 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_sametime_login_type,
|
|
{ "login type", "sametime.login_type",
|
|
FT_UINT16, BASE_HEX,
|
|
NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_sametime_time,
|
|
{ "time", "sametime.time",
|
|
FT_UINT32, BASE_DEC,
|
|
NULL, 0,
|
|
NULL, HFILL }
|
|
},
|
|
|
|
/*type handshake*/
|
|
{ &hf_sametime_handshake_major,
|
|
{ "major", "sametime.handshake.major",
|
|
FT_UINT16, BASE_HEX,
|
|
NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_sametime_handshake_minor,
|
|
{ "minor", "sametime.handshake.minor",
|
|
FT_UINT16, BASE_HEX,
|
|
NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_sametime_handshake_srvrcalc_addr,
|
|
{ "srvr", "sametime.handshake.srvrcalc_addr",
|
|
FT_IPv4, BASE_NONE,
|
|
NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_sametime_handshake_loclcalc_addr,
|
|
{ "locl", "sametime.handshake.loclcalc_addr",
|
|
FT_IPv4, BASE_NONE,
|
|
NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
|
|
/*type channel*/
|
|
{ &hf_sametime_channel_service,
|
|
{ "service id", "sametime.channel.service",
|
|
FT_UINT32, BASE_DEC,
|
|
NULL, 0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_sametime_channel_id,
|
|
{ "channel id", "sametime.channel.id",
|
|
FT_UINT32, BASE_DEC,
|
|
NULL, 0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_sametime_channel_send_type,
|
|
{ "send type", "sametime.channel.send_type",
|
|
FT_UINT16, BASE_HEX,
|
|
VALS(sendtypenames), 0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_sametime_channel_awareness,
|
|
{ "awareness", "sametime.channel.awareness",
|
|
FT_UINT16, BASE_HEX,
|
|
VALS(awarenessnames), 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
|
|
/*type user status*/
|
|
{ &hf_sametime_user_status,
|
|
{ "user status", "sametime.user_status_type",
|
|
FT_UINT16, BASE_HEX,
|
|
VALS(userstatusnames), 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
|
|
/*type location*/
|
|
{ &hf_sametime_location_name,
|
|
{ "name", "sametime.location.name",
|
|
FT_STRING, BASE_NONE,
|
|
NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_sametime_location_city,
|
|
{ "city", "sametime.location.city",
|
|
FT_STRING, BASE_NONE,
|
|
NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_sametime_location_province,
|
|
{ "province", "sametime.location.province",
|
|
FT_STRING, BASE_NONE,
|
|
NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_sametime_location_postalcode,
|
|
{ "postal code", "sametime.location.postalcode",
|
|
FT_STRING, BASE_NONE,
|
|
NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_sametime_location_country,
|
|
{ "country", "sametime.location.country",
|
|
FT_STRING, BASE_NONE,
|
|
NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_sametime_location_phone,
|
|
{ "phone", "sametime.location.phone",
|
|
FT_STRING, BASE_NONE,
|
|
NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_sametime_location_timezone,
|
|
{ "time zone", "sametime.location.timezone",
|
|
FT_STRING, BASE_NONE,
|
|
NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
};
|
|
|
|
static gint *ett[] = {
|
|
&ett_sametime,
|
|
&ett_sametime_options
|
|
};
|
|
|
|
module_t *sametime_module;
|
|
|
|
proto_sametime = proto_register_protocol ("Sametime Protocol", "SAMETIME", "sametime");
|
|
proto_register_field_array(proto_sametime, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
|
|
sametime_tap = register_tap("sametime");
|
|
|
|
/* Preference setting */
|
|
sametime_module = prefs_register_protocol(proto_sametime, NULL);
|
|
prefs_register_bool_preference(sametime_module, "show_length",
|
|
"Show length",
|
|
"Show length of text field",
|
|
&global_sametime_show_length);
|
|
prefs_register_bool_preference(sametime_module, "reassemble",
|
|
"Reassemble","reassemble packets",
|
|
&global_sametime_reassemble_packets);
|
|
}
|
|
|
|
|
|
/*
|
|
create / register
|
|
*/
|
|
void
|
|
proto_reg_handoff_sametime(void)
|
|
{
|
|
sametime_handle = create_dissector_handle(dissect_sametime, proto_sametime);
|
|
dissector_add_uint_with_preference("tcp.port", DEFAULT_SAMETIME_PORT, sametime_handle);
|
|
|
|
stats_tree_register("sametime", "sametime", "Sametime/Messages", 0,
|
|
sametime_stats_tree_packet,
|
|
sametime_stats_tree_init, NULL );
|
|
|
|
}
|
|
|
|
|
|
/*
|
|
* Editor modelines - https://www.wireshark.org/tools/modelines.html
|
|
*
|
|
* Local variables:
|
|
* c-basic-offset: 4
|
|
* tab-width: 8
|
|
* indent-tabs-mode: nil
|
|
* End:
|
|
*
|
|
* vi: set shiftwidth=4 tabstop=8 expandtab:
|
|
* :indentSize=4:tabSize=8:noTabs=true:
|
|
*/
|