epan/dissectors/packet-mesh.c

   1 /* packet-mesh-header.c
   2  * Routines for Mesh Header dissection
   3  * Javier Cardona <javier@cozybit.com>
   4  * Copyright 2007, Marvell Semiconductors Inc.
   5  *
   6  * Wireshark - Network traffic analyzer
   7  * By Gerald Combs <gerald@wireshark.org>
   8  * Copyright 1998 Gerald Combs
   9  *
  10  * SPDX-License-Identifier: GPL-2.0-or-later
  11  */
  12
  13 #include "config.h"
  14
  15 #include <epan/packet.h>
  16
  17 void proto_register_mesh(void);
  18
  19 /* Initialize the protocol and registered fields */
  20 static int proto_mesh;
  21 static int hf_mesh_ttl;
  22 static int hf_mesh_e2eseq;
  23
  24 /* Initialize the subtree pointers */
  25 static int ett_mesh;
  26
  27 /* Code to actually dissect the packets */
  28 static int
  29 dissect_mesh(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
  30 {
  31   /* Set up structures needed to add the protocol subtree and manage it */
  32   proto_item *ti;
  33   proto_tree *mesh_tree;
  34   uint8_t mesh_ttl;
  35   uint16_t mesh_e2eseq;
  36
  37   /* Make entries in Protocol column and Info column on summary display */
  38   col_set_str(pinfo->cinfo, COL_PROTOCOL, "Mesh");
  39
  40   if (tree) {
  41     ti = proto_tree_add_item(tree, proto_mesh, tvb, 0, 5, ENC_NA);
  42     mesh_tree = proto_item_add_subtree(ti, ett_mesh);
  43
  44     /* add an item to the subtree, see section 1.6 for more information */
  45     mesh_ttl = tvb_get_uint8(tvb, 2);
  46     proto_tree_add_uint(mesh_tree, hf_mesh_ttl, tvb, 2, 1, mesh_ttl);
  47
  48     mesh_e2eseq = tvb_get_ntohs(tvb, 3);
  49     proto_tree_add_uint(mesh_tree, hf_mesh_e2eseq, tvb, 3, 2, mesh_e2eseq);
  50   }
  51
  52   /* Return the amount of data this dissector was able to dissect */
  53   return 5;
  54 }
  55
  56
  57 /* Register the protocol with Wireshark */
  58
  59 /* this format is require because a script is used to build the C function
  60    that calls all the protocol registration.
  61 */
  62
  63 void
  64 proto_register_mesh(void)
  65 {
  66   /* Setup list of header fields  See Section 1.6.1 for details*/
  67   static hf_register_info hf[] = {
  68     { &hf_mesh_ttl,
  69       { "Mesh TTL", "mesh.ttl", FT_UINT8, BASE_DEC,
  70         NULL, 0x0, NULL, HFILL }},
  71
  72     { &hf_mesh_e2eseq,
  73       { "Mesh End-to-end Seq", "mesh.e2eseq", FT_UINT16, BASE_HEX,
  74         NULL, 0x0, NULL, HFILL }},
  75   };
  76
  77   /* Setup protocol subtree array */
  78   static int *ett[] = {
  79     &ett_mesh
  80   };
  81
  82   /* Register the protocol name and description */
  83   proto_mesh = proto_register_protocol("Mesh Header", "Mesh", "mesh");
  84
  85   /* Required function calls to register the header fields and subtrees used */
  86   proto_register_field_array(proto_mesh, hf, array_length(hf));
  87   proto_register_subtree_array(ett, array_length(ett));
  88
  89   register_dissector("mesh", dissect_mesh, proto_mesh);
  90 }
  91
  92 /*
  93  * Editor modelines  -  https://www.wireshark.org/tools/modelines.html
  94  *
  95  * Local Variables:
  96  * c-basic-offset: 2
  97  * tab-width: 8
  98  * indent-tabs-mode: nil
  99  * End:
 100  *
 101  * ex: set shiftwidth=2 tabstop=8 expandtab:
 102  * :indentSize=2:tabSize=8:noTabs=true:
 103  */