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wireshark/packet-aim.c

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AIM/OSCAR dissector, from Ralf Holzer. svn path=/trunk/; revision=2571
2000-11-06 00:07:04 +00:00
/* packet-aim.c
* Routines for AIM Instant Messenger (OSCAR) dissection
* Copyright 2000, Ralf Hoelzer <ralf@well.com>
*
Remove more "CHECK_DISPLAY_AS_DATA()" calls and "pinfo->current_proto =" statements. Move the setting of the Protocol column in various dissectors before anything is fetched from the packet, and also clear the Info column at that point in those and some other dissectors, so that if an exception is thrown, the columns don't reflect the previous protocol. Don't use col_add_fstr(..., "%s", string); Use col_add_str(..., string); as it does the same thing, but doesn't drag all the heavy *printf machinery in. Fix the DDTP dissector to set the Info column regardless of whether we're building a protocol tree or not, and to set it to "Encrypted payload" if the payload is encrypted. Also fix a typo in a field name. Register the FTP data dissector as being associated with the FTP data protocol, not the FTP protocol (the removed "CHECK_DISPLAY_AS_DATA()" call checked "proto_ftp_data", and the removed "pinfo->current_proto =" line set it to "FTP-DATA", so it should be associated with "proto_ftp_data"). Make the H1 dissector check whether the frame has at least 2 bytes in it before checking the first two bytes; heuristic dissectors must not throw exceptions until they've accepted the packet as one of theirs. Use "tvb_format_text()" rather than "tvb_get_ptr()" and "format_text()" in some dissectors where the result of "tvb_get_ptr()" is used only in the "format_text()" call. In the Quake dissector, don't check whether there are at least 4 bytes in the packet - if we return, the packet won't be dissected at all (it's not as if some other dissector will get to handle it), and, if we don't return, we'll throw an exception if there aren't at least 4 bytes in the packet, so the packet will be marked as short or malformed, as appropriate. In the RIPng dissector, associate the table of strings for the command field with the command field, so that the dissector doesn't have to format the string for the protocol tree entry itself, and so that the filter construction dialog box can let you select "Request" or "Response" from a list rather than requiring you to know the values for "Request" and "Response". Make "dissect_rpc()" static, as it's called only through a heuristic dissector list. Use "col_set_str()" to set the COL_PROTOCOL column for RPC protocols; the string used is from a table provided by the dissector, and is a string constant. Don't format the Info column for WSP into a buffer and then format that buffer into the column with "%s" - "col_add_fstr()" can do the formatting for you, without having to allocate your own buffer (or run through the *printf machinery twice). Don't fetch fields from the WTP packet until you're ready to use them, so that you don't throw an exception before you even set the Protocol column or clear the Info column. Use "pinfo->destport", not "pi.destport", in the Zebra dissector when checking whether the packet is a request or reply, and do the check by comparing with "pinfo->match_port" rather than TCP_PORT_ZEBRA (so that if the dissector is ever registered on another port, it still correctly determines whether the packet is a request or reply - the Network Monitor HTTP dissector has port 80 wired into its brain, which is a bit irritating if you're trying to get it to dissect HTTP proxy traffic on port 3128 or proxy administration UI traffic on port 3132). svn path=/trunk/; revision=2931
2001-01-22 08:03:46 +00:00
* $Id: packet-aim.c,v 1.7 2001/01/22 08:03:44 guy Exp $
AIM/OSCAR dissector, from Ralf Holzer. svn path=/trunk/; revision=2571
2000-11-06 00:07:04 +00:00
*
* Ethereal - Network traffic analyzer
* By Gerald Combs <gerald@unicom.net>
* 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
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#ifdef HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
#ifdef HAVE_NETINET_IN_H
# include <netinet/in.h>
#endif
#include <glib.h>
#ifdef NEED_SNPRINTF_H
# include "snprintf.h"
#endif
#include "packet.h"
#include "strutil.h"
#define TCP_PORT_AIM 5190
#define MAX_BUDDYNAME_LENGTH 30
#define STRIP_TAGS 1
/* channels */
#define CHANNEL_NEW_CONN 0x01
#define CHANNEL_SNAC_DATA 0x02
#define CHANNEL_FLAP_ERR 0x03
#define CHANNEL_CLOSE_CONN 0x04
/* SNAC families */
#define FAMILY_GENERIC 0x0001
#define FAMILY_LOCATION 0x0002
#define FAMILY_BUDDYLIST 0x0003
#define FAMILY_MESSAGING 0x0004
#define FAMILY_ADVERTS 0x0005
#define FAMILY_INVITATION 0x0006
#define FAMILY_ADMIN 0x0007
#define FAMILY_POPUP 0x0008
#define FAMILY_BOS 0x0009
#define FAMILY_USERLOOKUP 0x000A
#define FAMILY_STATS 0x000B
#define FAMILY_TRANSLATE 0x000C
#define FAMILY_CHAT_NAV 0x000D
#define FAMILY_CHAT 0x000E
Updates from Ralf Holzer. svn path=/trunk/; revision=2704
2000-11-28 06:38:47 +00:00
#define FAMILY_SIGNON 0x0017
AIM/OSCAR dissector, from Ralf Holzer. svn path=/trunk/; revision=2571
2000-11-06 00:07:04 +00:00
/* messaging */
Updates from Ralf Holzer. svn path=/trunk/; revision=2704
2000-11-28 06:38:47 +00:00
#define MSG_TO_CLIENT 0x006
#define MSG_FROM_CLIENT 0x007
AIM/OSCAR dissector, from Ralf Holzer. svn path=/trunk/; revision=2571
2000-11-06 00:07:04 +00:00
static void dissect_aim(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
Updates from Ralf Holzer. svn path=/trunk/; revision=2704
2000-11-28 06:38:47 +00:00
static void get_message( u_char *msg, tvbuff_t *tvb, int msg_offset, int msg_length);
static int get_buddyname( char *name, tvbuff_t *tvb, int len_offset, int name_offset);
AIM/OSCAR dissector, from Ralf Holzer. svn path=/trunk/; revision=2571
2000-11-06 00:07:04 +00:00
/* Initialize the protocol and registered fields */
static int proto_aim = -1;
static int hf_aim_cmd_start = -1;
static int hf_aim_channel = -1;
static int hf_aim_seqno = -1;
static int hf_aim_data_len = -1;
static int hf_aim_fnac_family = -1;
static int hf_aim_fnac_subtype = -1;
/* Initialize the subtree pointers */
static gint ett_aim = -1;
static gint ett_aim_fnac = -1;
/* Code to actually dissect the packets */
static void dissect_aim(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
/* Header fields */
unsigned char hdr_channel; /* channel ID */
unsigned short hdr_sequence_no; /* Internal frame sequence number, not needed */
unsigned short hdr_data_field_length; /* length of data within frame */
guint16 family;
guint16 subtype;
guint8 buddyname_length = 0;
char buddyname[MAX_BUDDYNAME_LENGTH];
u_char msg[1000];
/* Set up structures we will need to add the protocol subtree and manage it */
proto_item *ti;
proto_item *ti1;
proto_tree *aim_tree = NULL;
proto_tree *aim_tree_fnac = NULL;
/* check, if this is really an AIM packet, they start with 0x2a */
if(!(tvb_get_guint8(tvb, 0) == 0x2a)) {
/* Not an instant messenger packet, just happened to use the same port */
return;
}
/* Make entries in Protocol column and Info column on summary display */
if (check_col(pinfo->fd, COL_PROTOCOL))
For each column, have both a buffer into which strings for that column can be put, and a pointer to the string for the column, which might or might not point to that buffer. Add a routine "col_set_str()", which sets the string for the column to the string passed to it as an argument; it should only be handed a static string (a string constant would be ideal). It doesn't do any copying, so it's faster than "col_add_str()". Make the routines that append to columns check whether the pointer to the string for the column points to the buffer for the column and, if not, copy the string for the column to the buffer for the column so that you can append to it (so you can use "col_set_str()" and then use "col_append_str()" or "col_append_fstr()"). Convert a bunch of "col_add_str()" calls that take a string constant as an argument to "col_set_str()" calls. Convert some "col_add_fstr()" calls that take a string constant as the only argument - i.e., the format string doesn't have any "%" slots into which to put strings for subsequent arguments to "col_set_str()" calls (those calls are just like "col_add_str()" calls). Replace an END_OF_FRAME reference in a tvbuffified dissector with a "tvb_length(tvb)" call. svn path=/trunk/; revision=2670
2000-11-19 08:54:37 +00:00
col_set_str(pinfo->fd, COL_PROTOCOL, "AIM");
AIM/OSCAR dissector, from Ralf Holzer. svn path=/trunk/; revision=2571
2000-11-06 00:07:04 +00:00
if (check_col(pinfo->fd, COL_INFO))
col_add_str(pinfo->fd, COL_INFO, "AOL Instant Messenger");
/* get relevant header information */
hdr_channel = tvb_get_guint8(tvb, 1);
hdr_sequence_no = tvb_get_ntohs(tvb, 2);
hdr_data_field_length = tvb_get_ntohs(tvb, 4);
/* In the interest of speed, if "tree" is NULL, don't do any work not
necessary to generate protocol tree items. */
if (tree) {
ti = proto_tree_add_item(tree, proto_aim, tvb, 0, tvb_length(tvb), FALSE);
aim_tree = proto_item_add_subtree(ti, ett_aim);
proto_tree_add_uint(aim_tree, hf_aim_cmd_start, tvb, 0, 1, '*');
proto_tree_add_uint(aim_tree, hf_aim_channel, tvb, 1, 1, hdr_channel);
proto_tree_add_uint(aim_tree, hf_aim_seqno, tvb, 2, 2, hdr_sequence_no);
proto_tree_add_uint(aim_tree, hf_aim_data_len, tvb, 4, 2, hdr_data_field_length);
}
switch(hdr_channel)
{
/* New connection request */
case CHANNEL_NEW_CONN:
if (check_col(pinfo->fd, COL_INFO)) col_add_fstr(pinfo->fd, COL_INFO, "New Connection");
break;
/* SNAC channel. Most packets are of this type, such as messages or buddy list
* management.
*/
case CHANNEL_SNAC_DATA:
family = tvb_get_ntohs(tvb, 6);
subtype = tvb_get_ntohs(tvb, 8);
if (check_col(pinfo->fd, COL_INFO)) {
col_add_fstr(pinfo->fd, COL_INFO, "SNAC data");
}
if( tree )
{
Updates from Ralf Holzer. svn path=/trunk/; revision=2704
2000-11-28 06:38:47 +00:00
ti1 = proto_tree_add_text(aim_tree, tvb, 6, tvb_length(tvb) - 6, "FNAC");
AIM/OSCAR dissector, from Ralf Holzer. svn path=/trunk/; revision=2571
2000-11-06 00:07:04 +00:00
aim_tree_fnac = proto_item_add_subtree(ti1, ett_aim_fnac);
proto_tree_add_uint(aim_tree_fnac, hf_aim_fnac_family, tvb, 6, 2, family);
proto_tree_add_uint(aim_tree_fnac, hf_aim_fnac_subtype, tvb, 8, 2, subtype);
}
if (check_col(pinfo->fd, COL_INFO)) col_add_fstr(pinfo->fd, COL_INFO, "Family: %d - Subtype: %d (unknown)", family, subtype);
switch(family)
{
Updates from Ralf Holzer. svn path=/trunk/; revision=2704
2000-11-28 06:38:47 +00:00
case FAMILY_SIGNON:
switch(subtype)
{
case 0x0002:
buddyname_length = get_buddyname( buddyname, tvb, 19, 20 );
if (check_col(pinfo->fd, COL_INFO)) {
col_add_fstr(pinfo->fd, COL_INFO, "Login");
col_append_fstr(pinfo->fd, COL_INFO, ": %s", buddyname);
}
if( tree )
{
proto_tree_add_text(aim_tree_fnac, tvb, 20, buddyname_length, "Screen Name: %s", buddyname);
}
break;
case 0x0003:
if (check_col(pinfo->fd, COL_INFO)) col_add_fstr(pinfo->fd, COL_INFO, "Login information reply");
break;
case 0x0006:
buddyname_length = get_buddyname( buddyname, tvb, 19, 20 );
if (check_col(pinfo->fd, COL_INFO)) {
col_add_fstr(pinfo->fd, COL_INFO, "Sign-on");
col_append_fstr(pinfo->fd, COL_INFO, ": %s", buddyname);
}
if( tree )
{
proto_tree_add_text(aim_tree_fnac, tvb, 20, buddyname_length, "Screen Name: %s", buddyname);
}
break;
case 0x0007:
if (check_col(pinfo->fd, COL_INFO)) col_add_fstr(pinfo->fd, COL_INFO, "Sign-on reply");
break;
}
break;
AIM/OSCAR dissector, from Ralf Holzer. svn path=/trunk/; revision=2571
2000-11-06 00:07:04 +00:00
case FAMILY_GENERIC:
switch(subtype)
{
case 0x0002:
if (check_col(pinfo->fd, COL_INFO)) col_add_fstr(pinfo->fd, COL_INFO, "Client is now online and ready for normal function");
break;
case 0x0003:
if (check_col(pinfo->fd, COL_INFO)) col_add_fstr(pinfo->fd, COL_INFO, "Server is now ready for normal functions");
break;
case 0x0004:
if (check_col(pinfo->fd, COL_INFO)) col_add_fstr(pinfo->fd, COL_INFO, "Request for new service (server will redirect client)");
break;
case 0x0005:
if (check_col(pinfo->fd, COL_INFO)) col_add_fstr(pinfo->fd, COL_INFO, "Redirect response");
break;
case 0x0006:
if (check_col(pinfo->fd, COL_INFO)) col_add_fstr(pinfo->fd, COL_INFO, "Request Rate Information");
break;
case 0x0007:
if (check_col(pinfo->fd, COL_INFO)) col_add_fstr(pinfo->fd, COL_INFO, "Rate information response");
break;
case 0x0008:
if (check_col(pinfo->fd, COL_INFO)) col_add_fstr(pinfo->fd, COL_INFO, "Rate Information Response Ack");
break;
case 0x0016:
if (check_col(pinfo->fd, COL_INFO)) col_add_fstr(pinfo->fd, COL_INFO, "No-op");
break;
}
break;
case FAMILY_BUDDYLIST:
switch(subtype)
{
case 0x0001:
if (check_col(pinfo->fd, COL_INFO)) col_add_fstr(pinfo->fd, COL_INFO, "Buddylist - Error");
break;
case 0x0002:
if (check_col(pinfo->fd, COL_INFO)) col_add_fstr(pinfo->fd, COL_INFO, "Request Rights information");
break;
case 0x0003:
if (check_col(pinfo->fd, COL_INFO)) col_add_fstr(pinfo->fd, COL_INFO, "Rights information");
break;
case 0x0004:
if (check_col(pinfo->fd, COL_INFO)) col_add_fstr(pinfo->fd, COL_INFO, "Add to Buddylist");
break;
case 0x0005:
if (check_col(pinfo->fd, COL_INFO)) col_add_fstr(pinfo->fd, COL_INFO, "Remove from Buddylist");
break;
case 0x000b:
buddyname_length = get_buddyname( buddyname, tvb, 16, 17 );
if (check_col(pinfo->fd, COL_INFO)) {
Updates from Ralf Holzer. svn path=/trunk/; revision=2704
2000-11-28 06:38:47 +00:00
col_add_fstr(pinfo->fd, COL_INFO, "Oncoming Buddy");
AIM/OSCAR dissector, from Ralf Holzer. svn path=/trunk/; revision=2571
2000-11-06 00:07:04 +00:00
col_append_fstr(pinfo->fd, COL_INFO, ": %s", buddyname);
}
if( tree )
{
proto_tree_add_text(aim_tree_fnac, tvb, 17, buddyname_length, "Screen Name: %s", buddyname);
}
break;
case 0x000c:
buddyname_length = get_buddyname( buddyname, tvb, 16, 17 );
if (check_col(pinfo->fd, COL_INFO)) {
Updates from Ralf Holzer. svn path=/trunk/; revision=2704
2000-11-28 06:38:47 +00:00
col_add_fstr(pinfo->fd, COL_INFO, "Offgoing Buddy");
AIM/OSCAR dissector, from Ralf Holzer. svn path=/trunk/; revision=2571
2000-11-06 00:07:04 +00:00
col_append_fstr(pinfo->fd, COL_INFO, ": %s", buddyname);
}
if( tree )
{
proto_tree_add_text(aim_tree_fnac, tvb, 17, buddyname_length, "Screen Name: %s", buddyname);
}
break;
}
break;
case FAMILY_LOCATION:
switch(subtype)
{
case 0x0001:
if (check_col(pinfo->fd, COL_INFO)) col_add_fstr(pinfo->fd, COL_INFO, "Location - Error");
break;
case 0x0002:
if (check_col(pinfo->fd, COL_INFO)) col_add_fstr(pinfo->fd, COL_INFO, "Request Rights Information");
break;
case 0x0003:
if (check_col(pinfo->fd, COL_INFO)) col_add_fstr(pinfo->fd, COL_INFO, "Rights Information");
break;
case 0x0004:
if (check_col(pinfo->fd, COL_INFO)) col_add_fstr(pinfo->fd, COL_INFO, "Set User Information");
break;
case 0x0005:
if (check_col(pinfo->fd, COL_INFO)) col_add_fstr(pinfo->fd, COL_INFO, "Request User Information");
break;
case 0x0006:
if (check_col(pinfo->fd, COL_INFO)) col_add_fstr(pinfo->fd, COL_INFO, "User Information");
break;
case 0x0007:
if (check_col(pinfo->fd, COL_INFO)) col_add_fstr(pinfo->fd, COL_INFO, "Watcher Subrequest");
break;
case 0x0008:
if (check_col(pinfo->fd, COL_INFO)) col_add_fstr(pinfo->fd, COL_INFO, "Watcher Notification");
break;
}
break;
case FAMILY_ADVERTS:
switch(subtype)
{
case 0x0001:
if (check_col(pinfo->fd, COL_INFO)) col_add_fstr(pinfo->fd, COL_INFO, "Advertisements - Error");
break;
case 0x0002:
if (check_col(pinfo->fd, COL_INFO)) col_add_fstr(pinfo->fd, COL_INFO, "Advertisement Request");
break;
case 0x0003:
if (check_col(pinfo->fd, COL_INFO)) col_add_fstr(pinfo->fd, COL_INFO, "Advertisement data (GIF)");
break;
}
break;
case FAMILY_USERLOOKUP:
switch(subtype)
{
case 0x0001:
if (check_col(pinfo->fd, COL_INFO)) col_add_fstr(pinfo->fd, COL_INFO, "Search - Error (could be: not found)");
break;
case 0x0002:
if (check_col(pinfo->fd, COL_INFO)) col_add_fstr(pinfo->fd, COL_INFO, "Search for Screen Name by e-mail");
break;
case 0x0003:
if (check_col(pinfo->fd, COL_INFO)) col_add_fstr(pinfo->fd, COL_INFO, "Screen Name Search Result");
break;
}
break;
Updates from Ralf Holzer. svn path=/trunk/; revision=2704
2000-11-28 06:38:47 +00:00
case FAMILY_CHAT:
switch(subtype)
{
case 0x005:
/* channel message from client */
get_message( msg, tvb, 40 + buddyname_length, tvb_length(tvb) - 40 - buddyname_length );
if (check_col(pinfo->fd, COL_INFO)) {
col_add_fstr(pinfo->fd, COL_INFO, "Chat Message ");
col_append_fstr(pinfo->fd, COL_INFO, " -> %s", msg);
}
break;
case 0x006:
/* channel message to client */
buddyname_length = get_buddyname( buddyname, tvb, 30, 31 );
get_message( msg, tvb, 36 + buddyname_length, tvb_length(tvb) - 36 - buddyname_length );
if (check_col(pinfo->fd, COL_INFO)) {
col_add_fstr(pinfo->fd, COL_INFO, "Chat Message ");
col_append_fstr(pinfo->fd, COL_INFO, "from: %s", buddyname);
col_append_fstr(pinfo->fd, COL_INFO, " -> %s", msg);
}
if( tree )
{
proto_tree_add_text(aim_tree_fnac, tvb, 31, buddyname_length, "Screen Name: %s", buddyname);
}
break;
}
break;
AIM/OSCAR dissector, from Ralf Holzer. svn path=/trunk/; revision=2571
2000-11-06 00:07:04 +00:00
case FAMILY_MESSAGING:
switch(subtype)
{
Updates from Ralf Holzer. svn path=/trunk/; revision=2704
2000-11-28 06:38:47 +00:00
case MSG_TO_CLIENT:
AIM/OSCAR dissector, from Ralf Holzer. svn path=/trunk/; revision=2571
2000-11-06 00:07:04 +00:00
buddyname_length = get_buddyname( buddyname, tvb, 26, 27 );
get_message( msg, tvb, 36 + buddyname_length, tvb_length(tvb) - 36 - buddyname_length );
if (check_col(pinfo->fd, COL_INFO)) {
Updates from Ralf Holzer. svn path=/trunk/; revision=2704
2000-11-28 06:38:47 +00:00
col_add_fstr(pinfo->fd, COL_INFO, "Message ");
col_append_fstr(pinfo->fd, COL_INFO, "to: %s", buddyname);
AIM/OSCAR dissector, from Ralf Holzer. svn path=/trunk/; revision=2571
2000-11-06 00:07:04 +00:00
col_append_fstr(pinfo->fd, COL_INFO, " -> %s", msg);
}
if( tree )
{
proto_tree_add_text(aim_tree_fnac, tvb, 27, buddyname_length, "Screen Name: %s", buddyname);
}
break;
Updates from Ralf Holzer. svn path=/trunk/; revision=2704
2000-11-28 06:38:47 +00:00
case MSG_FROM_CLIENT:
AIM/OSCAR dissector, from Ralf Holzer. svn path=/trunk/; revision=2571
2000-11-06 00:07:04 +00:00
buddyname_length = get_buddyname( buddyname, tvb, 26, 27 );
get_message( msg, tvb, 36 + buddyname_length, tvb_length(tvb) - 36 - buddyname_length);
if (check_col(pinfo->fd, COL_INFO)) {
Updates from Ralf Holzer. svn path=/trunk/; revision=2704
2000-11-28 06:38:47 +00:00
col_add_fstr(pinfo->fd, COL_INFO, "Message");
col_append_fstr(pinfo->fd, COL_INFO, " from: %s", buddyname);
AIM/OSCAR dissector, from Ralf Holzer. svn path=/trunk/; revision=2571
2000-11-06 00:07:04 +00:00
col_append_fstr(pinfo->fd, COL_INFO, " -> %s", msg);
}
if( tree )
{
proto_tree_add_text(aim_tree_fnac, tvb, 27, buddyname_length, "Screen Name: %s", buddyname);
}
break;
}
break;
}
break;
case CHANNEL_FLAP_ERR:
if (check_col(pinfo->fd, COL_INFO)) {
col_add_fstr(pinfo->fd, COL_INFO, "FLAP error");
}
break;
case CHANNEL_CLOSE_CONN:
if (check_col(pinfo->fd, COL_INFO)) {
col_add_fstr(pinfo->fd, COL_INFO, "Close Connection");
}
break;
default:
if (check_col(pinfo->fd, COL_INFO)) {
col_add_fstr(pinfo->fd, COL_INFO, "Unknown Channel: %d", hdr_channel );
}
break;
}
}
Updates from Ralf Holzer. svn path=/trunk/; revision=2704
2000-11-28 06:38:47 +00:00
static int get_buddyname( char *name, tvbuff_t *tvb, int len_offset, int name_offset)
AIM/OSCAR dissector, from Ralf Holzer. svn path=/trunk/; revision=2571
2000-11-06 00:07:04 +00:00
{
guint8 buddyname_length;
buddyname_length = tvb_get_guint8(tvb, len_offset);
if(buddyname_length > MAX_BUDDYNAME_LENGTH ) buddyname_length = MAX_BUDDYNAME_LENGTH;
memset( name, '\0', sizeof(name));
tvb_get_nstringz0(tvb, name_offset, buddyname_length, name);
return buddyname_length;
}
Updates from Ralf Holzer. svn path=/trunk/; revision=2704
2000-11-28 06:38:47 +00:00
static void get_message( u_char *msg, tvbuff_t *tvb, int msg_offset, int msg_length)
AIM/OSCAR dissector, from Ralf Holzer. svn path=/trunk/; revision=2571
2000-11-06 00:07:04 +00:00
{
int i,j,c;
int bracket = FALSE;
int max, tagchars = 0;
int new_offset = msg_offset;
int new_length = msg_length;
/* make sure nothing bigger than 1000 bytes is printed */
if( msg_length > 999 ) return;
memset( msg, '\0', 1000);
i = 0;
c = 0;
/* loop until HTML tag is reached - quick&dirty way to find start of message
* (it is nearly impossible to find the correct start offset for all client versions) */
while( (tagchars < 6) && (new_length > 5) )
{
j = tvb_get_guint8(tvb, new_offset);
if( ( (j == '<') && (tagchars == 0) ) ||
( (j == 'h') && (tagchars == 1) ) ||
( (j == 'H') && (tagchars == 1) ) ||
( (j == 't') && (tagchars == 2) ) ||
( (j == 'T') && (tagchars == 2) ) ||
( (j == 'm') && (tagchars == 3) ) ||
( (j == 'M') && (tagchars == 3) ) ||
( (j == 'l') && (tagchars == 4) ) ||
( (j == 'L') && (tagchars == 4) ) ||
( (j == '>') && (tagchars == 5) ) ) tagchars++;
new_offset++;
new_length--;
}
/* set offset and length of message to after the first HTML tag */
msg_offset = new_offset;
msg_length = new_length;
max = msg_length - 1;
tagchars = 0;
/* find the rest of the message until either a </html> is reached or the end of the frame.
* All other HTML tags are stripped to display only the raw message (printable characters) */
while( (c < max) && (tagchars < 7) )
{
j = tvb_get_guint8(tvb, msg_offset+c);
/* make sure this is an HTML tag by checking the order of the chars */
if( ( (j == '<') && (tagchars == 0) ) ||
( (j == '/') && (tagchars == 1) ) ||
( (j == 'h') && (tagchars == 2) ) ||
( (j == 'H') && (tagchars == 2) ) ||
( (j == 't') && (tagchars == 3) ) ||
( (j == 'T') && (tagchars == 3) ) ||
( (j == 'm') && (tagchars == 4) ) ||
( (j == 'M') && (tagchars == 4) ) ||
( (j == 'l') && (tagchars == 5) ) ||
( (j == 'L') && (tagchars == 5) ) ||
( (j == '>') && (tagchars == 6) ) ) tagchars++;
#ifdef STRIP_TAGS
if( j == '<' ) bracket = TRUE;
if( j == '>' ) bracket = FALSE;
if( (isprint(j) ) && (bracket == FALSE) && (j != '>'))
#else
if( isprint(j) )
#endif
{
msg[i] = j;
i++;
}
c++;
}
}
/* Register the protocol with Ethereal */
Updates from Ralf Holzer. svn path=/trunk/; revision=2704
2000-11-28 06:38:47 +00:00
void
proto_register_aim(void)
AIM/OSCAR dissector, from Ralf Holzer. svn path=/trunk/; revision=2571
2000-11-06 00:07:04 +00:00
{
/* Setup list of header fields */
static hf_register_info hf[] = {
{ &hf_aim_cmd_start,
{ "Command Start", "aim.cmd_start", FT_UINT8, BASE_HEX, NULL, 0x0, "" }
},
{ &hf_aim_channel,
{ "Channel ID", "aim.channel", FT_UINT8, BASE_HEX, NULL, 0x0, "" }
},
{ &hf_aim_seqno,
{ "Sequence Number", "aim.seqno", FT_UINT16, BASE_DEC, NULL, 0x0, "" }
},
{ &hf_aim_data_len,
{ "Data Field Length", "aim.datalen", FT_UINT16, BASE_DEC, NULL, 0x0, "" }
},
{ &hf_aim_fnac_family,
{ "FNAC Family ID", "aim.fnac.family", FT_UINT16, BASE_HEX, NULL, 0x0, "" }
},
{ &hf_aim_fnac_subtype,
{ "FNAC Subtype ID", "aim.fnac.subtype", FT_UINT16, BASE_HEX, NULL, 0x0, "" }
},
};
/* Setup protocol subtree array */
static gint *ett[] = {
&ett_aim,
&ett_aim_fnac,
};
/* Register the protocol name and description */
Have "proto_register_protocol()" build a list of data structures for protocols, in addition to adding structures to the list of filterable fields. Give it an extra argument that specifies a "short name" for the protocol, for use in such places as pinfo->current_proto; the dialog box for constructing filters; the preferences tab for the protocol; and so on (although we're not yet using it in all those places). Make the preference name that appears in the preferences file and the command line for the DIAMETER protocol "diameter", not "Diameter"; the convention is that the name in question be all-lower-case. Make some routines and variables that aren't exported static. Update a comment in the ICP dissector to make it clear that the dissector won't see fragments other than the first fragment of a fragmented datagram. svn path=/trunk/; revision=2810
2001-01-03 06:56:03 +00:00
proto_aim = proto_register_protocol("AOL Instant Messenger", "AIM", "aim");
AIM/OSCAR dissector, from Ralf Holzer. svn path=/trunk/; revision=2571
2000-11-06 00:07:04 +00:00
/* Required function calls to register the header fields and subtrees used */
proto_register_field_array(proto_aim, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
};
void
proto_reg_handoff_aim(void)
{
Add an additional "protocol index" argument to "{old_}dissector_add()", "{old_}heur_dissector_add()", "{old_}conv_dissector_add()", and "register_dissector()", so that an entry in those tables has associated with it the protocol index of the protocol the dissector handles (or -1, if there is no protocol index for it). This is for future use in a number of places. (Arguably, "proto_register_protocol()" should take a dissector pointer as an argument, but 1) it'd have to handle both regular and heuristic dissectors; 2) making it take either a "dissector_t" or a union of that and a "heur_dissector_t" introduces some painful header-file interdependencies so I'm punting on that for now. As with other Ethereal internal APIs, these APIs are subject to change in the future, at least until Ethereal 1.0 comes out....) svn path=/trunk/; revision=2849
2001-01-09 06:32:10 +00:00
dissector_add("tcp.port", TCP_PORT_AIM, &dissect_aim, proto_aim);
AIM/OSCAR dissector, from Ralf Holzer. svn path=/trunk/; revision=2571
2000-11-06 00:07:04 +00:00
}