epan/dissectors/packet-flexnet.c

   1 /* packet-flexnet.c
   2  *
   3  * Routines for Amateur Packet Radio protocol dissection
   4  * Copyright 2005,2006,2007,2008,2009,2010,2012 R.W. Stearn <richard@rns-stearn.demon.co.uk>
   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 /*
  14  * Information on the protocol drawn from:
  15  *
  16  * Inspiration on how to build the dissector drawn from
  17  *   packet-sdlc.c
  18  *   packet-x25.c
  19  *   packet-lapb.c
  20  *   paket-gprs-llc.c
  21  *   xdlc.c
  22  * with the base file built from README.developers.
  23  */
  24
  25 #include "config.h"
  26
  27 #include <epan/packet.h>
  28 #include <epan/ax25_pids.h>
  29
  30 void proto_register_flexnet(void);
  31 void proto_reg_handoff_flexnet(void);
  32
  33 static dissector_handle_t flexnet_handle;
  34
  35 #define FLEXNET_ADRLEN  15
  36 #define FLEXNET_CTLLEN  15
  37 #define FLEXNET_HDRLEN  (FLEXNET_ADRLEN + FLEXNET_ADRLEN + FLEXNET_CTLLEN)
  38
  39 static int proto_flexnet;
  40 static int hf_flexnet_dst;
  41 static int hf_flexnet_src;
  42 static int hf_flexnet_ctl;
  43
  44 static int ett_flexnet;
  45 static int ett_flexnet_ctl;
  46
  47 static int
  48 dissect_flexnet(tvbuff_t *tvb, packet_info *pinfo, proto_tree *parent_tree, void* data _U_)
  49 {
  50         tvbuff_t   *next_tvb;
  51
  52         col_set_str( pinfo->cinfo, COL_PROTOCOL, "Flexnet");
  53         col_clear( pinfo->cinfo, COL_INFO );
  54
  55         if ( parent_tree )
  56                 {
  57                 proto_item *ti;
  58                 proto_tree *flexnet_tree;
  59                 int         offset;
  60
  61                 /* create display subtree for the protocol */
  62
  63                 ti = proto_tree_add_protocol_format( parent_tree, proto_flexnet, tvb, 0, FLEXNET_HDRLEN, "FLEXNET" );
  64
  65                 flexnet_tree = proto_item_add_subtree( ti, ett_flexnet );
  66
  67                 offset = 0;
  68
  69                 proto_tree_add_item( flexnet_tree, hf_flexnet_dst, tvb, offset, FLEXNET_ADRLEN, ENC_NA );
  70                 offset +=FLEXNET_ADRLEN;
  71
  72                 proto_tree_add_item( flexnet_tree, hf_flexnet_src, tvb, offset, FLEXNET_ADRLEN, ENC_NA );
  73                 offset +=FLEXNET_ADRLEN;
  74
  75                 proto_tree_add_item( flexnet_tree, hf_flexnet_ctl, tvb, offset, FLEXNET_CTLLEN, ENC_NA );
  76                 /* offset +=FLEXNET_CTLLEN; */
  77                 }
  78
  79         /* Call sub-dissectors here */
  80
  81         next_tvb = tvb_new_subset_remaining(tvb, FLEXNET_HDRLEN);
  82         call_data_dissector(next_tvb, pinfo, parent_tree );
  83         return tvb_captured_length(tvb);
  84 }
  85
  86 void
  87 proto_register_flexnet(void)
  88 {
  89         /* Setup list of header fields */
  90         static hf_register_info hf[] = {
  91                 { &hf_flexnet_dst,
  92                         { "Destination",                "flexnet.dst",
  93                         FT_BYTES, BASE_NONE, NULL, 0x0,
  94                         "Destination address", HFILL }
  95                 },
  96                 { &hf_flexnet_src,
  97                         { "Source",                     "flexnet.src",
  98                         FT_BYTES, BASE_NONE, NULL, 0x0,
  99                         "Source address", HFILL }
 100                 },
 101                 { &hf_flexnet_ctl,
 102                         { "Control",                    "flexnet.ctl",
 103                         FT_BYTES, BASE_NONE, NULL, 0x0,
 104                         NULL, HFILL }
 105                 },
 106         };
 107
 108         /* Setup protocol subtree array */
 109         static int *ett[] = {
 110                 &ett_flexnet,
 111                 &ett_flexnet_ctl,
 112         };
 113
 114         /* Register the protocol name and description */
 115         proto_flexnet = proto_register_protocol("FlexNet", "FLEXNET", "flexnet");
 116
 117         /* Required function calls to register the header fields and subtrees used */
 118         proto_register_field_array( proto_flexnet, hf, array_length( hf ) );
 119         proto_register_subtree_array( ett, array_length( ett ) );
 120
 121         flexnet_handle = register_dissector( "flexnet", dissect_flexnet, proto_flexnet );
 122 }
 123
 124 void
 125 proto_reg_handoff_flexnet(void)
 126 {
 127         dissector_add_uint( "ax25.pid", AX25_P_FLEXNET, flexnet_handle );
 128 }
 129
 130 /*
 131  * Editor modelines  -  https://www.wireshark.org/tools/modelines.html
 132  *
 133  * Local variables:
 134  * c-basic-offset: 8
 135  * tab-width: 8
 136  * indent-tabs-mode: t
 137  * End:
 138  *
 139  * vi: set shiftwidth=8 tabstop=8 noexpandtab:
 140  * :indentSize=8:tabSize=8:noTabs=false:
 141  */