packet-symantec.c

   1 /* packet-symantec.c
   2  * Routines for dissection of packets from the Axent Raptor firewall/
   3  * Symantec Enterprise Firewall
   4  *
   5  * $Id: packet-symantec.c,v 1.1 2004/03/11 09:18:32 guy Exp $
   6  *
   7  * Ethereal - Network traffic analyzer
   8  * By Gerald Combs <gerald@ethereal.com>
   9  *
  10  * This program is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU General Public License
  12  * as published by the Free Software Foundation; either version 2
  13  * of the License, or (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  23  */
  24
  25 #ifdef HAVE_CONFIG_H
  26 # include "config.h"
  27 #endif
  28
  29 #include <glib.h>
  30
  31 #include <epan/packet.h>
  32
  33 #include "etypes.h"
  34
  35 static dissector_table_t ethertype_dissector_table;
  36
  37 /* protocols and header fields */
  38 static int proto_symantec = -1;
  39 static int hf_symantec_etype = -1;
  40
  41 static gint ett_symantec = -1;
  42
  43 static void
  44 dissect_symantec(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
  45 {
  46         proto_item *ti;
  47         proto_tree *symantec_tree = NULL;
  48         guint16 etype;
  49         tvbuff_t *next_tvb;
  50
  51         /*
  52          * There appears to be 6 bytes of mysterious junk, followed by an
  53          * Ethernet type (or, at least, there's 08 00), followed by 36 bytes
  54          * of 0.
  55          */
  56         if (check_col(pinfo->cinfo, COL_PROTOCOL))
  57                 col_add_str(pinfo->cinfo, COL_PROTOCOL, "Symantec");
  58         if (check_col(pinfo->cinfo, COL_INFO))
  59                 col_add_fstr(pinfo->cinfo, COL_INFO, "Symantec Enterprise Firewall");
  60         if (tree) {
  61                 ti = proto_tree_add_protocol_format(tree, proto_symantec, tvb,
  62                     0, 44, "Symantec firewall");
  63                 symantec_tree = proto_item_add_subtree(ti, ett_symantec);
  64         }
  65         etype = tvb_get_ntohs(tvb, 6);
  66         if (tree) {
  67                 proto_tree_add_uint(symantec_tree, hf_symantec_etype, tvb,
  68                     6, 2, etype);
  69         }
  70         next_tvb = tvb_new_subset(tvb, 44, -1, -1);
  71         dissector_try_port(ethertype_dissector_table, etype, next_tvb, pinfo,
  72             tree);
  73 }
  74
  75 void
  76 proto_register_symantec(void)
  77 {
  78         static hf_register_info hf[] = {
  79                 { &hf_symantec_etype,
  80                     { "Type",   "symantec.type", FT_UINT16, BASE_HEX, VALS(etype_vals), 0x0,
  81                         "", HFILL }},
  82         };
  83         static gint *ett[] = {
  84                 &ett_symantec,
  85         };
  86
  87         proto_symantec = proto_register_protocol("Symantec Enterprise Firewall",
  88             "Symantec", "symantec");
  89         proto_register_field_array(proto_symantec, hf, array_length(hf));
  90         proto_register_subtree_array(ett, array_length(ett));
  91 }
  92
  93 void
  94 proto_reg_handoff_symantec(void)
  95 {
  96         dissector_handle_t symantec_handle;
  97
  98         ethertype_dissector_table = find_dissector_table("ethertype");
  99
 100         symantec_handle = create_dissector_handle(dissect_symantec,
 101             proto_symantec);
 102         dissector_add("wtap_encap", WTAP_ENCAP_SYMANTEC, symantec_handle);
 103 }