epan/dissectors/packet-symantec.c

   1 /* packet-symantec.c
   2  * Routines for dissection of packets from the Axent Raptor firewall/
   3  * Symantec Enterprise Firewall
   4  *
   5  * $Id$
   6  *
   7  * Wireshark - Network traffic analyzer
   8  * By Gerald Combs <gerald@wireshark.org>
   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 <epan/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_if = -1;
  40 static int hf_symantec_etype = -1;
  41
  42 static gint ett_symantec = -1;
  43
  44 static void
  45 dissect_symantec(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
  46 {
  47         proto_item *ti;
  48         proto_tree *symantec_tree = NULL;
  49         guint16 etype;
  50         tvbuff_t *next_tvb;
  51
  52         /*
  53          * The first 4 bytes are the IPv4 address of the interface that
  54          * captured the data, followed by 2 bytes of 0, then an Ethernet
  55          * type, followed by 36 bytes of 0.
  56          */
  57         if (check_col(pinfo->cinfo, COL_PROTOCOL))
  58                 col_add_str(pinfo->cinfo, COL_PROTOCOL, "Symantec");
  59         if (check_col(pinfo->cinfo, COL_INFO))
  60                 col_add_fstr(pinfo->cinfo, COL_INFO, "Symantec Enterprise Firewall");
  61         if (tree) {
  62                 ti = proto_tree_add_protocol_format(tree, proto_symantec, tvb,
  63                     0, 44, "Symantec firewall");
  64                 symantec_tree = proto_item_add_subtree(ti, ett_symantec);
  65         }
  66         etype = tvb_get_ntohs(tvb, 6);
  67         if (tree) {
  68                 proto_tree_add_item(symantec_tree, hf_symantec_if, tvb,
  69                     0, 4, FALSE);
  70                 proto_tree_add_uint(symantec_tree, hf_symantec_etype, tvb,
  71                     6, 2, etype);
  72         }
  73         next_tvb = tvb_new_subset(tvb, 44, -1, -1);
  74         dissector_try_port(ethertype_dissector_table, etype, next_tvb, pinfo,
  75             tree);
  76 }
  77
  78 void
  79 proto_register_symantec(void)
  80 {
  81         static hf_register_info hf[] = {
  82                 { &hf_symantec_if,
  83                     { "Interface",      "symantec.if", FT_IPv4, BASE_NONE, NULL, 0x0,
  84                         "Interface", HFILL }},
  85                 { &hf_symantec_etype,
  86                     { "Type",   "symantec.type", FT_UINT16, BASE_HEX, VALS(etype_vals), 0x0,
  87                         "", HFILL }},
  88         };
  89         static gint *ett[] = {
  90                 &ett_symantec,
  91         };
  92
  93         proto_symantec = proto_register_protocol("Symantec Enterprise Firewall",
  94             "Symantec", "symantec");
  95         proto_register_field_array(proto_symantec, hf, array_length(hf));
  96         proto_register_subtree_array(ett, array_length(ett));
  97 }
  98
  99 void
 100 proto_reg_handoff_symantec(void)
 101 {
 102         dissector_handle_t symantec_handle;
 103
 104         ethertype_dissector_table = find_dissector_table("ethertype");
 105
 106         symantec_handle = create_dissector_handle(dissect_symantec,
 107             proto_symantec);
 108         dissector_add("wtap_encap", WTAP_ENCAP_SYMANTEC, symantec_handle);
 109 }