epan/dissectors/packet-ans.c

   1 /* packet-ans.c
   2  * Routines for Intel ANS probe dissection
   3  *
   4  * Wireshark - Network traffic analyzer
   5  * By Gerald Combs <gerald@wireshark.org>
   6  * Copyright 2003 Gerald Combs
   7  *
   8  * SPDX-License-Identifier: GPL-2.0-or-later
   9  *
  10  * The following information was graciously provided by Intel:
  11  * Offset    Size (bytes)    Contents
  12  * 0         6               Destination Broadcast probes: {FF,FF,FF,FF,FF,FF}
  13  *                           Multicast probes: {01,AA,00,00,00,00}
  14  * 6         6               Source Matches the CurrentMACAddress of the
  15  *                           adapter sending the probe.
  16  * 8         2               Type Network order is 0x886D, Intel's reserved
  17  *                           packet type.
  18  * 10 (0)    2               ApplicationID Network order is 0x0001, identifies
  19  *                           it as fault tolerance probe.
  20  * 12 (2)    2               RevID Network order, identifies the revision id
  21  *                           of Teaming software.
  22  * 16 (4)    4               ProbeSequenceNumber Ascending sequence number
  23  *                           that identifies the current probing cycle.
  24  * 20 (8)    2               SenderID Unique ID within a team identifying
  25  *                           the member that originally sent the probe.
  26  * 22 (10)   6               TeamID Unique ID identifying the team in charge
  27  *                           of this probe.
  28  * 28        Padding         Reserved
  29  *
  30  */
  31
  32 #include "config.h"
  33
  34 #include <epan/packet.h>
  35 #include <epan/to_str.h>
  36 #include <epan/etypes.h>
  37
  38 void proto_register_ans(void);
  39 void proto_reg_handoff_ans(void);
  40
  41 static dissector_handle_t ans_handle;
  42
  43 /* Initialize the protocol and registered fields */
  44 static int proto_ans;
  45
  46 static int hf_ans_app_id;
  47 static int hf_ans_rev_id;
  48 static int hf_ans_seq_num;
  49 static int hf_ans_sender_id;
  50 static int hf_ans_team_id;
  51
  52 /* Initialize the subtree pointers */
  53 static int ett_ans;
  54
  55 /* Code to actually dissect the packets */
  56 static int
  57 dissect_ans(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
  58 {
  59         proto_item  *ti;
  60         proto_tree  *ans_tree;
  61         uint16_t     sender_id;
  62         uint32_t     seq_num;
  63
  64         col_set_str(pinfo->cinfo, COL_PROTOCOL, "Intel ANS probe");
  65
  66         seq_num = tvb_get_ntohl(tvb, 4);
  67         sender_id = tvb_get_ntohs(tvb, 8);
  68
  69         col_add_fstr(pinfo->cinfo, COL_INFO, "Sequence: %u, Sender ID %u, Team ID %s",
  70                 seq_num, sender_id, tvb_ether_to_str(pinfo->pool, tvb, 10));
  71
  72         ti = proto_tree_add_item(tree, proto_ans, tvb, 0, -1, ENC_NA);
  73         ans_tree = proto_item_add_subtree(ti, ett_ans);
  74
  75         proto_tree_add_item(ans_tree, hf_ans_app_id, tvb, 0, 2, ENC_BIG_ENDIAN);
  76         proto_tree_add_item(ans_tree, hf_ans_rev_id, tvb, 2, 2, ENC_BIG_ENDIAN);
  77         proto_tree_add_item(ans_tree, hf_ans_seq_num, tvb, 4, 4, ENC_BIG_ENDIAN);
  78         proto_tree_add_item(ans_tree, hf_ans_sender_id, tvb, 8, 2, ENC_BIG_ENDIAN);
  79         proto_tree_add_item(ans_tree, hf_ans_team_id, tvb, 10, 6, ENC_NA);
  80
  81         return tvb_captured_length(tvb);
  82 }
  83
  84
  85 void
  86 proto_register_ans(void)
  87 {
  88         static hf_register_info hf[] = {
  89                 { &hf_ans_app_id,
  90                         { "Application ID", "ans.app_id",
  91                                 FT_UINT16, BASE_HEX, NULL, 0,
  92                                 "Intel ANS Application ID", HFILL }
  93                 },
  94                 { &hf_ans_rev_id,
  95                         { "Revision ID", "ans.rev_id",
  96                                 FT_UINT16, BASE_HEX, NULL, 0,
  97                                 "Intel ANS Revision ID", HFILL }
  98                 },
  99                 { &hf_ans_seq_num,
 100                         { "Sequence Number", "ans.seq_num",
 101                                 FT_UINT32, BASE_DEC, NULL, 0,
 102                                 "Intel ANS Sequence Number", HFILL }
 103                 },
 104                 { &hf_ans_sender_id,
 105                         { "Sender ID", "ans.sender_id",
 106                                 FT_UINT16, BASE_DEC, NULL, 0,
 107                                 "Intel ANS Sender ID", HFILL }
 108                 },
 109                 { &hf_ans_team_id,
 110                         { "Team ID", "ans.team_id",
 111                                 FT_ETHER, BASE_NONE, NULL, 0,
 112                                 "Intel ANS Team ID", HFILL }
 113                 },
 114         };
 115
 116         static int *ett[] = {
 117                 &ett_ans,
 118         };
 119
 120         proto_ans = proto_register_protocol("Intel ANS probe", "ANS", "ans");
 121         proto_register_field_array(proto_ans, hf, array_length(hf));
 122         proto_register_subtree_array(ett, array_length(ett));
 123
 124         ans_handle = register_dissector("ans", dissect_ans, proto_ans);
 125 }
 126
 127
 128 void
 129 proto_reg_handoff_ans(void)
 130 {
 131         dissector_add_uint("ethertype", ETHERTYPE_INTEL_ANS, ans_handle);
 132 }
 133
 134 /*
 135  * Editor modelines  -  https://www.wireshark.org/tools/modelines.html
 136  *
 137  * Local variables:
 138  * c-basic-offset: 8
 139  * tab-width: 8
 140  * indent-tabs-mode: t
 141  * End:
 142  *
 143  * vi: set shiftwidth=8 tabstop=8 noexpandtab:
 144  * :indentSize=8:tabSize=8:noTabs=false:
 145  */