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         {0,     "Sent"},
  59         {1,     "Rcvd"},
  60         {0, NULL}
  61 };
  62
  63 static void
  64 dissect_hci_h4(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
  65 {
  66         guint8 type;
  67         tvbuff_t *next_tvb;
  68         proto_item *ti=NULL;
  69         proto_tree *hci_h4_tree=NULL;
  70
  71         if(check_col(pinfo->cinfo, COL_PROTOCOL))
  72                 col_set_str(pinfo->cinfo, COL_PROTOCOL, "HCI H4");
  73
  74         if(check_col(pinfo->cinfo, COL_INFO))
  75                 col_clear(pinfo->cinfo, COL_INFO);
  76
  77         type = tvb_get_guint8(tvb, 0);
  78
  79         if(tree){
  80                 ti = proto_tree_add_item(tree, proto_hci_h4, tvb, 0, 1, FALSE);
  81                 hci_h4_tree = proto_item_add_subtree(ti, ett_hci_h4);
  82         }
  83
  84         if(check_col(pinfo->cinfo, COL_INFO)){
  85                 col_add_fstr(pinfo->cinfo, COL_INFO, "%s %s",pinfo->p2p_dir==P2P_DIR_SENT?"Sent":"Rcvd",val_to_str(type, hci_h4_type_vals, "Unknown 0x%02x"));
  86         }
  87         ti=proto_tree_add_uint(hci_h4_tree, hf_hci_h4_direction, tvb, 0, 0, pinfo->p2p_dir);
  88         PROTO_ITEM_SET_GENERATED(ti);
  89         proto_item_append_text(hci_h4_tree, " %s %s", val_to_str(pinfo->p2p_dir, hci_h4_direction_vals, "0x%02x"), val_to_str(type, hci_h4_type_vals, "Unknown 0x%02x"));
  90
  91         proto_tree_add_item(hci_h4_tree, hf_hci_h4_type,
  92                 tvb, 0, 1, TRUE);
  93
  94         next_tvb = tvb_new_subset(tvb, 1, -1, -1);
  95         if(!dissector_try_port(hci_h4_table, type, next_tvb, pinfo, tree)) {
  96 /*
  97                 if(check_col(pinfo->cinfo, COL_INFO)){
  98                         col_add_fstr(pinfo->cinfo, COL_INFO, "Unknown HCI H4 payload type 0x%02x", type);
  99                 }
 100 */
 101                 call_dissector(data_handle, next_tvb, pinfo, tree);
 102         }
 103 }
 104
 105
 106 void
 107 proto_register_hci_h4(void)
 108 {
 109         static hf_register_info hf[] = {
 110         { &hf_hci_h4_type,
 111                 { "HCI Packet Type",           "hci_h4.type",
 112                 FT_UINT8, BASE_HEX, VALS(hci_h4_type_vals), 0x0,
 113                 "HCI Packet Type", HFILL }},
 114
 115         { &hf_hci_h4_direction,
 116                 { "Direction",           "hci_h4.direction",
 117                 FT_UINT8, BASE_HEX, VALS(hci_h4_direction_vals), 0x0,
 118                 "HCI Packet Direction Sent/Rcvd", HFILL }},
 119
 120         };
 121
 122         static gint *ett[] = {
 123                 &ett_hci_h4,
 124         };
 125
 126         proto_hci_h4 = proto_register_protocol("Bluetooth HCI H4",
 127             "HCI_H4", "hci_h4");
 128
 129         register_dissector("hci_h4", dissect_hci_h4, proto_hci_h4);
 130
 131         proto_register_field_array(proto_hci_h4, hf, array_length(hf));
 132         proto_register_subtree_array(ett, array_length(ett));
 133
 134         hci_h4_table = register_dissector_table("hci_h4.type",
 135                 "HCI H4 pdu type", FT_UINT8, BASE_HEX);
 136 }
 137
 138 void
 139 proto_reg_handoff_hci_h4(void)
 140 {
 141         dissector_handle_t hci_h4_handle;
 142
 143         data_handle = find_dissector("data");
 144         hci_h4_handle = find_dissector("hci_h4");
 145         dissector_add("wtap_encap", WTAP_ENCAP_BLUETOOTH_H4, hci_h4_handle);
 146 }
 147
 148