packet-tacacs.c

   1 /* packet-tacacs.c
   2  * Routines for cisco tacacs/tacplus/AAA packet dissection
   3  *
   4  * $Id: packet-tacacs.c,v 1.1 1999/12/03 21:50:29 nneul Exp $
   5  *
   6  * Ethereal - Network traffic analyzer
   7  * By Gerald Combs <gerald@unicom.net>
   8  * Copyright 1998 Gerald Combs
   9  *
  10  * Copied from packet-tftp.c
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  25  */
  26
  27 #ifdef HAVE_CONFIG_H
  28 # include "config.h"
  29 #endif
  30
  31 #include <stdio.h>
  32
  33 #ifdef HAVE_SYS_TYPES_H
  34 # include <sys/types.h>
  35 #endif
  36
  37 #ifdef HAVE_NETINET_IN_H
  38 # include <netinet/in.h>
  39 #endif
  40
  41 #include <string.h>
  42 #include <glib.h>
  43 #include "packet.h"
  44
  45 static int proto_tacacs = -1;
  46 static int hf_tacacs_request = -1;
  47 static int hf_tacacs_response = -1;
  48 static int hf_tacacs_version = -1;
  49
  50 static gint ett_tacacs = -1;
  51
  52 void
  53 dissect_tacacs(const u_char *pd, int offset, frame_data *fd, proto_tree *tree)
  54 {
  55         proto_tree      *tacacs_tree, *ti;
  56
  57         if (check_col(fd, COL_PROTOCOL))
  58         col_add_str(fd, COL_PROTOCOL, "TACACS");
  59
  60         if (check_col(fd, COL_INFO))
  61         {
  62                 col_add_fstr(fd, COL_INFO, "%s",
  63                         (pi.match_port == pi.destport) ? "Request" : "Response");
  64         }
  65
  66         if (tree)
  67         {
  68                 ti = proto_tree_add_item(tree, proto_tacacs, offset, END_OF_FRAME, NULL);
  69                 tacacs_tree = proto_item_add_subtree(ti, ett_tacacs);
  70
  71                 proto_tree_add_item(tacacs_tree, hf_tacacs_version, 0, 0, "XTacacs");
  72
  73                 if (pi.match_port == pi.destport)
  74                 {
  75                         proto_tree_add_item_hidden(tacacs_tree, hf_tacacs_request,
  76                                                    offset, END_OF_FRAME, TRUE);
  77                         proto_tree_add_text(tacacs_tree, offset,
  78                                 END_OF_FRAME, "Request: <opaque data>" );
  79                 }
  80                 else
  81                 {
  82                         proto_tree_add_item_hidden(tacacs_tree, hf_tacacs_response,
  83                                                    offset, END_OF_FRAME, TRUE);
  84                         proto_tree_add_text(tacacs_tree, offset,
  85                                 END_OF_FRAME, "Response: <opaque data>");
  86                 }
  87         }
  88 }
  89
  90 void
  91 dissect_tacplus(const u_char *pd, int offset, frame_data *fd, proto_tree *tree)
  92 {
  93         proto_tree      *tacacs_tree, *ti;
  94
  95         if (check_col(fd, COL_PROTOCOL))
  96         col_add_str(fd, COL_PROTOCOL, "TACACS");
  97
  98         if (check_col(fd, COL_INFO))
  99         {
 100                 col_add_fstr(fd, COL_INFO, "%s",
 101                         (pi.match_port == pi.destport) ? "Request" : "Response");
 102         }
 103
 104         if (tree)
 105         {
 106                 ti = proto_tree_add_item(tree, proto_tacacs, offset, END_OF_FRAME, NULL);
 107                 tacacs_tree = proto_item_add_subtree(ti, ett_tacacs);
 108
 109                 proto_tree_add_item(tacacs_tree, hf_tacacs_version, 0, 0, "Tacacs+");
 110
 111                 if (pi.match_port == pi.destport)
 112                 {
 113                         proto_tree_add_item_hidden(tacacs_tree, hf_tacacs_request,
 114                                                    offset, END_OF_FRAME, TRUE);
 115                         proto_tree_add_text(tacacs_tree, offset,
 116                                 END_OF_FRAME, "Request: <opaque data>" );
 117                 }
 118                 else
 119                 {
 120                         proto_tree_add_item_hidden(tacacs_tree, hf_tacacs_response,
 121                                                    offset, END_OF_FRAME, TRUE);
 122                         proto_tree_add_text(tacacs_tree, offset,
 123                                 END_OF_FRAME, "Response: <opaque data>");
 124                 }
 125         }
 126 }
 127
 128 void
 129 proto_register_tacacs(void)
 130 {
 131         static hf_register_info hf[] = {
 132           { &hf_tacacs_version,
 133             { "Tacacs Version",           "tacacs.version",
 134               FT_STRING, BASE_NONE, NULL, 0x0,
 135               "xtacacs or tacplus" }},
 136           { &hf_tacacs_response,
 137             { "Response",           "tacacs.response",
 138               FT_BOOLEAN, BASE_NONE, NULL, 0x0,
 139               "TRUE if TACACS response" }},
 140           { &hf_tacacs_request,
 141             { "Request",            "tacacs.request",
 142               FT_BOOLEAN, BASE_NONE, NULL, 0x0,
 143               "TRUE if TACACS request" }}
 144         };
 145
 146         static gint *ett[] = {
 147                 &ett_tacacs,
 148         };
 149         proto_tacacs = proto_register_protocol("TACACS", "tacacs");
 150         proto_register_field_array(proto_tacacs, hf, array_length(hf));
 151         proto_register_subtree_array(ett, array_length(ett));
 152 }