nexmon – Rev 1
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/* packet-aim-ssi.c
* Routines for AIM Instant Messenger (OSCAR) dissection, SNAC SSI
* Copyright 2004, Jelmer Vernooij <jelmer@samba.org>
* Copyright 2000, Ralf Hoelzer <ralf@well.com>
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include <epan/packet.h>
#include "packet-aim.h"
void proto_register_aim_ssi(void);
void proto_reg_handoff_aim_ssi(void);
#define FAMILY_SSI 0x0013
#define FAMILY_SSI_TYPE_BUDDY 0x0000
#define FAMILY_SSI_TYPE_GROUP 0x0001
#define FAMILY_SSI_TYPE_PERMIT 0x0002
#define FAMILY_SSI_TYPE_DENY 0x0003
#define FAMILY_SSI_TYPE_PDINFO 0x0004
#define FAMILY_SSI_TYPE_PRESENCEPREFS 0x0005
#define FAMILY_SSI_TYPE_ICONINFO 0x0014
static const value_string aim_fnac_family_ssi_types[] = {
{ FAMILY_SSI_TYPE_BUDDY, "Buddy" },
{ FAMILY_SSI_TYPE_GROUP, "Group" },
{ FAMILY_SSI_TYPE_PERMIT, "Permit" },
{ FAMILY_SSI_TYPE_DENY, "Deny" },
{ FAMILY_SSI_TYPE_PDINFO, "PDINFO" },
{ FAMILY_SSI_TYPE_PRESENCEPREFS, "Presence Preferences" },
{ FAMILY_SSI_TYPE_ICONINFO, "Icon Info" },
{ 0, NULL }
};
#define SSI_RIGHTSINFO_TLV_MAX_ITEMS 0x0004
static const aim_tlv aim_ssi_rightsinfo_tlvs[] = {
{ SSI_RIGHTSINFO_TLV_MAX_ITEMS, "Maximums For Items", dissect_aim_tlv_value_bytes },
{ 0, NULL, NULL },
};
/* Initialize the protocol and registered fields */
static int proto_aim_ssi = -1;
static int hf_aim_fnac_subtype_ssi_version = -1;
static int hf_aim_fnac_subtype_ssi_numitems = -1;
static int hf_aim_fnac_subtype_ssi_last_change_time = -1;
static int hf_aim_fnac_subtype_ssi_buddyname_len = -1;
static int hf_aim_fnac_subtype_ssi_buddyname_len8 = -1;
static int hf_aim_fnac_subtype_ssi_buddyname = -1;
static int hf_aim_fnac_subtype_ssi_gid = -1;
static int hf_aim_fnac_subtype_ssi_bid = -1;
static int hf_aim_fnac_subtype_ssi_type = -1;
static int hf_aim_fnac_subtype_ssi_tlvlen = -1;
/* static int hf_aim_fnac_subtype_ssi_data = -1; */
static int hf_aim_fnac_subtype_ssi_reason_str_len = -1;
static int hf_aim_fnac_subtype_ssi_reason_str = -1;
static int hf_aim_fnac_subtype_ssi_grant_auth_unkn = -1;
static int hf_aim_fnac_subtype_ssi_allow_auth = -1;
/* Initialize the subtree pointers */
static gint ett_aim_ssi = -1;
static gint ett_ssi = -1;
/** Calculate size of SSI entry
* Size of SSI entry can be calculated as:
* sizeof(buddy name length field) = sizeof(guint16) = 2
* + sizeof(buddy name string) = buddy name length field = N
* + sizeof(group ID) = sizeof(guint16) = 2
* + sizeof(buddy ID) = sizeof(guint16) = 2
* + sizeof(buddy type) = sizeof(guint16) = 2
* + sizeof(TLV length) = sizeof(guint16) = 2
* + sizeof(TLVs) = TLV length = M
* = 2 + N + 2 * 4 + M
*/
static int calc_ssi_entry_size(tvbuff_t *tvb, int offset)
{
gint ssi_entry_size = 2 + tvb_get_ntohs(tvb, offset) + 2 * 3;
ssi_entry_size += tvb_get_ntohs(tvb, offset + ssi_entry_size) + 2;
return ssi_entry_size;
}
static int dissect_ssi_item(tvbuff_t *tvb, packet_info *pinfo, int offset, proto_tree *ssi_entry)
{
guint16 buddyname_length = 0;
int endoffset;
guint16 tlv_len = 0;
/* Buddy Name Length */
buddyname_length = tvb_get_ntohs(tvb, offset);
proto_tree_add_item(ssi_entry, hf_aim_fnac_subtype_ssi_buddyname_len, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
/* Buddy Name */
if (buddyname_length > 0) {
proto_tree_add_item(ssi_entry, hf_aim_fnac_subtype_ssi_buddyname, tvb, offset, buddyname_length, ENC_UTF_8|ENC_NA);
offset += buddyname_length;
}
/* Buddy group ID */
proto_tree_add_item(ssi_entry, hf_aim_fnac_subtype_ssi_gid, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
/* Buddy ID */
proto_tree_add_item(ssi_entry, hf_aim_fnac_subtype_ssi_bid, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
/* Buddy Type */
proto_tree_add_item(ssi_entry, hf_aim_fnac_subtype_ssi_type, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
/* Size of the following TLV in bytes (as opposed to the number of
TLV objects in the chain) */
tlv_len = tvb_get_ntohs(tvb, offset);
proto_tree_add_item(ssi_entry, hf_aim_fnac_subtype_ssi_tlvlen, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
endoffset = offset;
/* For now, we just dump the TLV contents as-is, since there is not a
TLV dissection utility that works based on total chain length */
while(endoffset < offset+tlv_len) {
endoffset = dissect_aim_tlv(tvb, pinfo, endoffset, ssi_entry, aim_client_tlvs);
}
return endoffset;
}
static int dissect_ssi_ssi_item(tvbuff_t *tvb, packet_info *pinfo, proto_tree *ssi_entry)
{
return dissect_ssi_item(tvb, pinfo, 0, ssi_entry);
}
static int dissect_ssi_ssi_items(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
int offset = 0;
gint ssi_entry_size;
proto_tree *ssi_entry = NULL;
int size = tvb_reported_length(tvb);
while (size > offset)
{
ssi_entry_size = calc_ssi_entry_size(tvb, offset);
ssi_entry = proto_tree_add_subtree(tree, tvb, offset, ssi_entry_size, ett_aim_ssi, NULL, "SSI Entry");
offset = dissect_ssi_item(tvb, pinfo, offset, ssi_entry);
}
return offset;
}
static int dissect_aim_ssi_rightsinfo(tvbuff_t *tvb, packet_info *pinfo, proto_tree *ssi_tree)
{
return dissect_aim_tlv_sequence(tvb, pinfo, 0, ssi_tree, aim_ssi_rightsinfo_tlvs);
}
static int dissect_aim_ssi_was_added(tvbuff_t *tvb, packet_info *pinfo, proto_tree *ssi_tree)
{
return dissect_aim_buddyname(tvb, pinfo, 0, ssi_tree);
}
static int dissect_aim_snac_ssi_time_and_items_num(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree)
{
int offset = 0;
/* get timestamp */
nstime_t tmptime;
tmptime.secs = tvb_get_ntohl(tvb, offset);
tmptime.nsecs = 0;
proto_tree_add_time(tree, hf_aim_fnac_subtype_ssi_last_change_time, tvb, offset, 4, &tmptime);
offset += 4;
/* get number of SSI items */
proto_tree_add_item(tree, hf_aim_fnac_subtype_ssi_numitems, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
return offset;
}
static int dissect_aim_snac_ssi_list(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
int offset = 0;
proto_tree *ssi_entry = NULL;
guint16 num_items, i;
nstime_t tmptime;
gint ssi_entry_size;
/* SSI Version */
proto_tree_add_item(tree, hf_aim_fnac_subtype_ssi_version, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
/* Number of items */
proto_tree_add_item(tree, hf_aim_fnac_subtype_ssi_numitems, tvb, offset, 2, ENC_BIG_ENDIAN);
num_items = tvb_get_ntohs(tvb, offset);
offset += 2;
for(i = 0; i < num_items; i++) {
ssi_entry_size = calc_ssi_entry_size(tvb, offset);
ssi_entry = proto_tree_add_subtree_format(tree, tvb, offset, ssi_entry_size,
ett_aim_ssi, NULL, "SSI Entry %u", i);
offset = dissect_ssi_item(tvb, pinfo, offset, ssi_entry);
}
tmptime.secs = tvb_get_ntohl(tvb, offset);
tmptime.nsecs = 0;
proto_tree_add_time(tree, hf_aim_fnac_subtype_ssi_last_change_time, tvb, offset, 4, &tmptime);
return offset;
}
static int dissect_aim_snac_ssi_auth_request(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree)
{
int offset = 0;
guint16 reason_length;
/*guint16 unknown;*/
/* get buddy length (1 byte) */
guint8 buddyname_length = tvb_get_guint8(tvb, offset);
proto_tree_add_item(tree, hf_aim_fnac_subtype_ssi_buddyname_len8, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
/* show buddy name */
if (buddyname_length > 0) {
proto_tree_add_item(tree, hf_aim_fnac_subtype_ssi_buddyname, tvb, offset, buddyname_length, ENC_UTF_8|ENC_NA);
offset += buddyname_length;
}
/* get reason message length (2 bytes) */
reason_length = tvb_get_ntohs(tvb, offset);
proto_tree_add_item(tree, hf_aim_fnac_subtype_ssi_reason_str_len, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
/* show reason message if present */
if (reason_length > 0) {
proto_tree_add_item(tree, hf_aim_fnac_subtype_ssi_reason_str, tvb, offset, reason_length, ENC_UTF_8|ENC_NA);
offset += reason_length;
}
/* unknown (always 0x0000 ???) */
/*unknown = tvb_get_ntohs(tvb, offset);*/
proto_tree_add_item(tree, hf_aim_fnac_subtype_ssi_grant_auth_unkn, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
return offset;
}
static int dissect_aim_snac_ssi_auth_reply(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree)
{
int offset = 0;
guint16 reason_length;
/* get buddy length (1 byte) */
guint8 buddyname_length = tvb_get_guint8(tvb, offset);
proto_tree_add_item(tree, hf_aim_fnac_subtype_ssi_buddyname_len8, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
/* show buddy name */
if (buddyname_length > 0) {
proto_tree_add_item(tree, hf_aim_fnac_subtype_ssi_buddyname, tvb, offset, buddyname_length, ENC_UTF_8|ENC_NA);
offset += buddyname_length;
}
/* accept/reject authorization flag */
proto_tree_add_item(tree, hf_aim_fnac_subtype_ssi_allow_auth, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
/* get reason message length (2 bytes) */
reason_length = tvb_get_ntohs(tvb, offset);
proto_tree_add_item(tree, hf_aim_fnac_subtype_ssi_reason_str_len, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
/* show reason message if present */
if (reason_length > 0) {
proto_tree_add_item(tree, hf_aim_fnac_subtype_ssi_reason_str, tvb, offset, reason_length, ENC_UTF_8|ENC_NA);
offset += reason_length;
}
return offset;
}
static const aim_subtype aim_fnac_family_ssi[] = {
{ 0x0001, "Error", dissect_aim_snac_error },
{ 0x0002, "Request Rights", NULL },
{ 0x0003, "Rights Info", dissect_aim_ssi_rightsinfo },
{ 0x0004, "Request List (first time)", NULL },
{ 0x0005, "Request List", dissect_aim_snac_ssi_time_and_items_num },
{ 0x0006, "List", dissect_aim_snac_ssi_list },
{ 0x0007, "Activate", NULL },
{ 0x0008, "Add Buddy", dissect_ssi_ssi_item },
{ 0x0009, "Modify Buddy", dissect_ssi_ssi_items },
{ 0x000a, "Delete Buddy", dissect_ssi_ssi_item },
{ 0x000e, "Server Ack", dissect_aim_ssi_result },
{ 0x000f, "No List", dissect_aim_snac_ssi_time_and_items_num },
{ 0x0011, "Edit Start", NULL },
{ 0x0012, "Edit Stop", NULL },
{ 0x0014, "Grant Future Authorization to Buddy", dissect_aim_snac_ssi_auth_request },
{ 0x0015, "Future Authorization Granted", dissect_aim_snac_ssi_auth_request },
{ 0x0018, "Send Authentication Request", dissect_aim_snac_ssi_auth_request },
{ 0x0019, "Authentication Request", dissect_aim_snac_ssi_auth_request },
{ 0x001a, "Send Authentication Reply", dissect_aim_snac_ssi_auth_reply },
{ 0x001b, "Authentication Reply", dissect_aim_snac_ssi_auth_reply },
{ 0x001c, "Remote User Added Client To List", dissect_aim_ssi_was_added },
{ 0, NULL, NULL }
};
/* Register the protocol with Wireshark */
void
proto_register_aim_ssi(void)
{
/* Setup list of header fields */
static hf_register_info hf[] = {
{ &hf_aim_fnac_subtype_ssi_version,
{ "SSI Version", "aim_ssi.fnac.version", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }
},
{ &hf_aim_fnac_subtype_ssi_numitems,
{ "SSI Object count", "aim_ssi.fnac.numitems", FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL }
},
{ &hf_aim_fnac_subtype_ssi_last_change_time,
{ "SSI Last Change Time", "aim_ssi.fnac.last_change_time", FT_ABSOLUTE_TIME, ABSOLUTE_TIME_LOCAL, NULL, 0x0, NULL, HFILL }
},
{ &hf_aim_fnac_subtype_ssi_buddyname_len,
{ "SSI Buddy Name length", "aim_ssi.fnac.buddyname_len", FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL }
},
{ &hf_aim_fnac_subtype_ssi_buddyname,
{ "Buddy Name", "aim_ssi.fnac.buddyname", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL }
},
{ &hf_aim_fnac_subtype_ssi_gid,
{ "SSI Buddy Group ID", "aim_ssi.fnac.gid", FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL }
},
{ &hf_aim_fnac_subtype_ssi_bid,
{ "SSI Buddy ID", "aim_ssi.fnac.bid", FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL }
},
{ &hf_aim_fnac_subtype_ssi_type,
{ "SSI Buddy type", "aim_ssi.fnac.type", FT_UINT16, BASE_HEX, VALS(aim_fnac_family_ssi_types), 0x0, NULL, HFILL }
},
{ &hf_aim_fnac_subtype_ssi_tlvlen,
{ "SSI TLV Len", "aim_ssi.fnac.tlvlen", FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL }
},
#if 0
{ &hf_aim_fnac_subtype_ssi_data,
{ "SSI Buddy Data", "aim_ssi.fnac.data", FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL }
},
#endif
{ &hf_aim_fnac_subtype_ssi_buddyname_len8,
{ "SSI Buddy Name length", "aim_ssi.fnac.buddyname_len8", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }
},
{ &hf_aim_fnac_subtype_ssi_reason_str_len,
{ "Reason Message length", "aim_ssi.fnac.reason_len", FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL }
},
{ &hf_aim_fnac_subtype_ssi_reason_str,
{ "Reason Message", "aim_ssi.fnac.reason", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL }
},
{ &hf_aim_fnac_subtype_ssi_grant_auth_unkn,
{ "Unknown", "aim_ssi.fnac.auth_unkn", FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL }
},
{ &hf_aim_fnac_subtype_ssi_allow_auth,
{ "Allow flag", "aim_ssi.fnac.allow_auth_flag", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }
},
};
/* Setup protocol subtree array */
static gint *ett[] = {
&ett_aim_ssi,
&ett_ssi,
};
/* Register the protocol name and description */
proto_aim_ssi = proto_register_protocol("AIM Server Side Info", "AIM SSI", "aim_ssi");
/* Required function calls to register the header fields and subtrees used */
proto_register_field_array(proto_aim_ssi, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
}
void proto_reg_handoff_aim_ssi(void)
{
aim_init_family(proto_aim_ssi, ett_aim_ssi, FAMILY_SSI, aim_fnac_family_ssi);
}
/*
* Editor modelines - http://www.wireshark.org/tools/modelines.html
*
* Local variables:
* c-basic-offset: 8
* tab-width: 8
* indent-tabs-mode: t
* End:
*
* vi: set shiftwidth=8 tabstop=8 noexpandtab:
* :indentSize=8:tabSize=8:noTabs=false:
*/