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packet-aim-signon.c

/* packet-aim-signon.c
 * Routines for AIM Instant Messenger (OSCAR) dissection, SNAC Signon
 * Copyright 2004, Jelmer Vernooij <jelmer@samba.org>
 * Copyright 2000, Ralf Hoelzer <ralf@well.com>
 *
 * $Id: packet-aim-signon.c 18196 2006-05-21 04:49:01Z sahlberg $
 *
 * 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., 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>

#include <glib.h>

#include <epan/packet.h>
#include <epan/strutil.h>

#include "packet-aim.h"

#define FAMILY_SIGNON     0x0017


/* Initialize the protocol and registered fields */
static int proto_aim_signon = -1;
static int hf_aim_infotype = -1;
static int hf_aim_signon_challenge_len = -1;
static int hf_aim_signon_challenge = -1;


/* Initialize the subtree pointers */
static gint ett_aim_signon   = -1;

static int dissect_aim_snac_signon_logon(tvbuff_t *tvb, packet_info *pinfo, 
                                proto_tree *tree)
{
      int offset = 0;
      while (tvb_length_remaining(tvb, offset) > 0) {
            offset = dissect_aim_tlv(tvb, pinfo, offset, tree, client_tlvs);
      }
      return offset;
}

static int dissect_aim_snac_signon_logon_reply(tvbuff_t *tvb, 
                                    packet_info *pinfo, 
                                    proto_tree *tree)
{
      int offset = 0;
    while (tvb_length_remaining(tvb, offset) > 0) {
      offset = dissect_aim_tlv(tvb, pinfo, offset, tree, client_tlvs);
    }
      return offset;
}

static int dissect_aim_snac_signon_signon(tvbuff_t *tvb, packet_info *pinfo, 
                                 proto_tree *tree)
{
      guint8 buddyname_length = 0;
      int offset = 0;
      char buddyname[MAX_BUDDYNAME_LENGTH + 1];

      /* Info Type */
      proto_tree_add_item(tree, hf_aim_infotype, tvb, offset, 2, FALSE);
      offset += 2;

      /* Unknown */
      offset += 1;

      /* Buddy Name */
      buddyname_length = aim_get_buddyname( buddyname, tvb, offset, offset + 1 );

      if (check_col(pinfo->cinfo, COL_INFO)) {
            col_append_fstr(pinfo->cinfo, COL_INFO, " Username: %s",
                                    format_text(buddyname, buddyname_length));
      }

      if(tree) {
            offset+=dissect_aim_buddyname(tvb, pinfo, offset, tree);
      }

      return offset;
}

static int dissect_aim_snac_signon_signon_reply(tvbuff_t *tvb, 
                                                                        packet_info *pinfo _U_, 
                                                                        proto_tree *tree)
{
      int offset = 0;
      guint16 challenge_length = 0;

      /* Logon Challenge Length */
      challenge_length = tvb_get_ntohs(tvb, offset);
      proto_tree_add_item(tree, hf_aim_signon_challenge_len, tvb, offset, 2, FALSE);
      offset += 2;

      /* Challenge */
      proto_tree_add_item(tree, hf_aim_signon_challenge, tvb, offset, challenge_length, FALSE);
      offset += challenge_length;
      return offset;
}

static int dissect_aim_tlv_value_registration(proto_item *ti _U_, guint16 value_id _U_, tvbuff_t *tvb _U_, packet_info *pinfo _U_)
{
      /* FIXME */
      return 0;
}

#define REG_TLV_REGISTRATION_INFO   0x0001

static const aim_tlv registration_tlvs[] = {
      { REG_TLV_REGISTRATION_INFO, "Registration Info", dissect_aim_tlv_value_registration },
      { 0, NULL, NULL },
};

static int dissect_aim_snac_register (tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
      return dissect_aim_tlv(tvb, pinfo, 0, tree, registration_tlvs);
}

static const aim_subtype aim_fnac_family_signon[] = {
      { 0x0001, "Error", dissect_aim_snac_error },
      { 0x0002, "Logon", dissect_aim_snac_signon_logon },
      { 0x0003, "Logon Reply", dissect_aim_snac_signon_logon_reply },
      { 0x0004, "Request UIN", dissect_aim_snac_register },
      { 0x0005, "New UIN response", dissect_aim_snac_register },
      { 0x0006, "Sign-on", dissect_aim_snac_signon_signon },
      { 0x0007, "Sign-on Reply", dissect_aim_snac_signon_signon_reply },
      { 0x000a, "Server SecureID Request", NULL },
      { 0x000b, "Client SecureID Reply", NULL },
      { 0, NULL, NULL }
};


/* Register the protocol with Wireshark */
void
proto_register_aim_signon(void)
{

      /* Setup list of header fields */
      static hf_register_info hf[] = {
            { &hf_aim_infotype,
                  { "Infotype", "aim.infotype", FT_UINT16, BASE_HEX, NULL, 0x0, "", HFILL }
            },
            { &hf_aim_signon_challenge_len,
                  { "Signon challenge length", "aim.signon.challengelen", FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL }
            },
            { &hf_aim_signon_challenge,
                  { "Signon challenge", "aim.signon.challenge", FT_STRING, BASE_HEX, NULL, 0x0, "", HFILL }
            },
      };

      /* Setup protocol subtree array */
      static gint *ett[] = {
            &ett_aim_signon,
      };

      /* Register the protocol name and description */
      proto_aim_signon = proto_register_protocol("AIM Signon", "AIM Signon", "aim_signon");

      /* Required function calls to register the header fields and subtrees used */
      proto_register_field_array(proto_aim_signon, hf, array_length(hf));
      proto_register_subtree_array(ett, array_length(ett));
}

void
proto_reg_handoff_aim_signon(void)
{
      aim_init_family(proto_aim_signon, ett_aim_signon, FAMILY_SIGNON, aim_fnac_family_signon);
}

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