epan/dissectors/packet-hci_h4.c

   1 /* packet-hci_h4.c
   2  * Routines for the Bluetooth HCI H4 dissection
   3  *
   4  * Copyright 2002, Christoph Scholz <scholz@cs.uni-bonn.de>
   5  *  From: http://affix.sourceforge.net/archive/ethereal_affix-3.patch
   6  *
   7  * Refactored for wireshark checkin
   8  *   Ronnie Sahlberg 2006
   9  *
  10  * $Id$
  11  *
  12  * Wireshark - Network traffic analyzer
  13  * By Gerald Combs <gerald@wireshark.org>
  14  * Copyright 1998 Gerald Combs
  15  *
  16  * This program is free software; you can redistribute it and/or
  17  * modify it under the terms of the GNU General Public License
  18  * as published by the Free Software Foundation; either version 2
  19  * of the License, or (at your option) any later version.
  20  *
  21  * This program is distributed in the hope that it will be useful,
  22  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  23  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  24  * GNU General Public License for more details.
  25  *
  26  * You should have received a copy of the GNU General Public License
  27  * along with this program; if not, write to the Free Software
  28  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  29  */
  30
  31 #ifdef HAVE_CONFIG_H
  32 #include "config.h"
  33 #endif
  34
  35 #include <epan/packet.h>
  36
  37 #include "packet-hci_h4.h"
  38
  39
  40 static int proto_hci_h4 = -1;
  41 static int hf_hci_h4_type = -1;
  42 static int hf_hci_h4_direction = -1;
  43
  44 static gint ett_hci_h4 = -1;
  45
  46 static dissector_table_t hci_h4_table;
  47 static dissector_handle_t data_handle;
  48
  49
  50 static const value_string hci_h4_type_vals[] = {
  51         {HCI_H4_TYPE_CMD, "HCI Command"},
  52         {HCI_H4_TYPE_ACL, "ACL Data"},
  53         {HCI_H4_TYPE_SCO, "SCO Data"},
  54         {HCI_H4_TYPE_EVT, "HCI Event"},
  55         {0, NULL }
  56 };
  57 static const value_string hci_h4_direction_vals[] = {
  58         {P2P_DIR_SENT,          "Sent"},
  59         {P2P_DIR_RECV,          "Rcvd"},
  60         {P2P_DIR_UNKNOWN,       "Unspecified"},
  61         {0, NULL}
  62 };
  63
  64 static void
  65 dissect_hci_h4(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
  66 {
  67         guint8 type;
  68         tvbuff_t *next_tvb;
  69         proto_item *ti=NULL;
  70         proto_tree *hci_h4_tree=NULL;
  71
  72         col_set_str(pinfo->cinfo, COL_PROTOCOL, "HCI H4");
  73         switch (pinfo->p2p_dir) {
  74
  75         case P2P_DIR_SENT:
  76                 col_add_fstr(pinfo->cinfo, COL_INFO, "Sent ");
  77                 break;
  78
  79         case P2P_DIR_RECV:
  80                 col_add_fstr(pinfo->cinfo, COL_INFO, "Rcvd ");
  81                 break;
  82
  83         case P2P_DIR_UNKNOWN:
  84                 break;
  85
  86         default:
  87                 col_add_fstr(pinfo->cinfo, COL_INFO, "Unknown direction %d ",
  88                     pinfo->p2p_dir);
  89                 break;
  90         }
  91
  92         type = tvb_get_guint8(tvb, 0);
  93
  94         if(tree){
  95                 ti = proto_tree_add_item(tree, proto_hci_h4, tvb, 0, 1, ENC_NA);
  96                 hci_h4_tree = proto_item_add_subtree(ti, ett_hci_h4);
  97         }
  98
  99         ti=proto_tree_add_uint(hci_h4_tree, hf_hci_h4_direction, tvb, 0, 0, pinfo->p2p_dir);
 100         PROTO_ITEM_SET_GENERATED(ti);
 101
 102         proto_tree_add_item(hci_h4_tree, hf_hci_h4_type,
 103                 tvb, 0, 1, ENC_LITTLE_ENDIAN);
 104         col_append_fstr(pinfo->cinfo, COL_INFO, "%s",
 105                         val_to_str(type, hci_h4_type_vals, "Unknown HCI packet type 0x%02x"));
 106
 107         next_tvb = tvb_new_subset_remaining(tvb, 1);
 108         if(!dissector_try_uint(hci_h4_table, type, next_tvb, pinfo, tree)) {
 109                 call_dissector(data_handle, next_tvb, pinfo, tree);
 110         }
 111 }
 112
 113
 114 void
 115 proto_register_hci_h4(void)
 116 {
 117         static hf_register_info hf[] = {
 118         { &hf_hci_h4_type,
 119                 { "HCI Packet Type",           "hci_h4.type",
 120                 FT_UINT8, BASE_HEX, VALS(hci_h4_type_vals), 0x0,
 121                 NULL, HFILL }},
 122
 123         { &hf_hci_h4_direction,
 124                 { "Direction",           "hci_h4.direction",
 125                 FT_UINT8, BASE_HEX, VALS(hci_h4_direction_vals), 0x0,
 126                 "HCI Packet Direction Sent/Rcvd", HFILL }},
 127
 128         };
 129
 130         static gint *ett[] = {
 131                 &ett_hci_h4,
 132         };
 133
 134         proto_hci_h4 = proto_register_protocol("Bluetooth HCI H4",
 135             "HCI_H4", "hci_h4");
 136
 137         register_dissector("hci_h4", dissect_hci_h4, proto_hci_h4);
 138
 139         proto_register_field_array(proto_hci_h4, hf, array_length(hf));
 140         proto_register_subtree_array(ett, array_length(ett));
 141
 142         hci_h4_table = register_dissector_table("hci_h4.type",
 143                 "HCI H4 pdu type", FT_UINT8, BASE_HEX);
 144 }
 145
 146 void
 147 proto_reg_handoff_hci_h4(void)
 148 {
 149         dissector_handle_t hci_h4_handle;
 150
 151         data_handle = find_dissector("data");
 152         hci_h4_handle = find_dissector("hci_h4");
 153         dissector_add_uint("wtap_encap", WTAP_ENCAP_BLUETOOTH_H4, hci_h4_handle);
 154         dissector_add_uint("wtap_encap", WTAP_ENCAP_BLUETOOTH_H4_WITH_PHDR, hci_h4_handle);
 155 }
 156
 157