150 lines
5 KiB
C
150 lines
5 KiB
C
/* packet-aruba-erm.c
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* Routines for the disassembly of Aruba encapsulated remote mirroring frames
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* (Adapted from packet-hp-erm.c and packet-cisco-erspan.c)
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*
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* $Id$
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*
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* Copyright 2010 Alexis La Goutte <alexis.lagoutte at gmail dot com>
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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/*
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* Format:
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* Use the Header of Record (Packet) Header
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*
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* typedef struct pcaprec_hdr_s {
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* guint32 ts_sec; timestamp seconds
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* guint32 ts_usec; timestamp microseconds
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* guint32 incl_len; number of octets of packet saved in file
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* guint32 orig_len; actual length of packet
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* } pcaprec_hdr_t;
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*
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* Following with 802.11 header
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*/
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#include "config.h"
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#include <glib.h>
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#include <epan/packet.h>
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#include <epan/prefs.h>
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#define PROTO_SHORT_NAME "ARUBA_ERM"
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#define PROTO_LONG_NAME "ARUBA encapsulated remote mirroring"
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void proto_register_aruba_erm(void);
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void proto_reg_handoff_aruba_erm(void);
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static range_t *global_aruba_erm_port_range;
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static int proto_aruba_erm = -1;
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static int hf_aruba_erm_time = -1;
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static int hf_aruba_erm_incl_len = -1;
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static int hf_aruba_erm_orig_len = -1;
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static gint ett_aruba_erm = -1;
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static dissector_handle_t aruba_erm_handle;
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static dissector_handle_t ieee80211_handle;
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static void
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dissect_aruba_erm(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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proto_item *ti;
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proto_tree *aruba_erm_tree;
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tvbuff_t *eth_tvb;
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nstime_t ts;
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col_set_str(pinfo->cinfo, COL_PROTOCOL, PROTO_SHORT_NAME);
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col_set_str(pinfo->cinfo, COL_INFO, PROTO_SHORT_NAME ":");
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if (tree) {
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ti = proto_tree_add_item(tree, proto_aruba_erm, tvb, 0, -1, ENC_NA);
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aruba_erm_tree = proto_item_add_subtree(ti, ett_aruba_erm);
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ts.secs = tvb_get_ntohl(tvb, 0);
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ts.nsecs = tvb_get_ntohl(tvb,4)*1000;
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proto_tree_add_time(aruba_erm_tree, hf_aruba_erm_time, tvb, 0, 8,&ts);
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proto_tree_add_item(aruba_erm_tree, hf_aruba_erm_incl_len, tvb, 8, 4, ENC_BIG_ENDIAN);
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proto_tree_add_item(aruba_erm_tree, hf_aruba_erm_orig_len, tvb, 12, 4, ENC_BIG_ENDIAN);
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}
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eth_tvb = tvb_new_subset_remaining(tvb, 16);
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call_dissector(ieee80211_handle, eth_tvb, pinfo, tree);
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}
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void
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proto_register_aruba_erm(void)
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{
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static hf_register_info hf[] = {
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{ &hf_aruba_erm_time,
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{ "Packet Capture Timestamp", "aruba_erm.time", FT_ABSOLUTE_TIME, ABSOLUTE_TIME_LOCAL, NULL,
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0x00, NULL, HFILL }},
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{ &hf_aruba_erm_incl_len,
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{ "Packet Captured Length", "aruba_erm.incl_len", FT_UINT32, BASE_DEC, NULL,
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0x00, NULL, HFILL }},
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{ &hf_aruba_erm_orig_len,
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{ "Packet Length", "aruba_erm.orig_len", FT_UINT32, BASE_DEC, NULL,
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0x00, NULL, HFILL }},
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};
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static gint *ett[] = {
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&ett_aruba_erm,
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};
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module_t *aruba_erm_module;
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proto_aruba_erm = proto_register_protocol(PROTO_LONG_NAME, PROTO_SHORT_NAME, "aruba_erm");
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range_convert_str (&global_aruba_erm_port_range, "0", MAX_UDP_PORT);
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aruba_erm_module = prefs_register_protocol(proto_aruba_erm, proto_reg_handoff_aruba_erm);
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prefs_register_range_preference(aruba_erm_module, "udp.ports", "ARUBA_ERM UDP Port numbers",
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"Set the UDP port numbers (by default is range 5555 to 5560) used for ARUBA"
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" encapsulated remote mirroring frames;\n"
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"0 (default) means that the ARUBA_ERM dissector is not active\n",
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&global_aruba_erm_port_range, MAX_UDP_PORT);
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proto_register_field_array(proto_aruba_erm, hf, array_length(hf));
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proto_register_subtree_array(ett, array_length(ett));
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}
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void
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proto_reg_handoff_aruba_erm(void)
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{
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static range_t *aruba_erm_port_range;
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static gboolean initialized = FALSE;
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if (!initialized) {
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ieee80211_handle = find_dissector("wlan");
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aruba_erm_handle = create_dissector_handle(dissect_aruba_erm, proto_aruba_erm);
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initialized = TRUE;
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} else {
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dissector_delete_uint_range("udp.port", aruba_erm_port_range, aruba_erm_handle);
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g_free(aruba_erm_port_range);
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}
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aruba_erm_port_range = range_copy(global_aruba_erm_port_range);
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dissector_add_uint_range("udp.port", aruba_erm_port_range, aruba_erm_handle);
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}
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