forked from osmocom/wireshark
351 lines
9.9 KiB
C
351 lines
9.9 KiB
C
/* packet-aruba-papi.c
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* Routines for Aruba PAPI dissection
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* Copyright 2010, Alexis La Goutte <alexis.lagoutte at gmail dot com>
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*
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* Real name of PAPI : Protocol Application Program Interface
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* $Id$
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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 modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (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 along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#if 0
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/* Include only as needed */
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#endif
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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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/* This is not IANA assigned nor registered */
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#define UDP_PORT_PAPI 8211
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/* Initialize the protocol and registered fields */
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static int proto_papi = -1;
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static int hf_papi_hdr_id = -1;
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static int hf_papi_hdr_version = -1;
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static int hf_papi_hdr_ip_destination = -1;
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static int hf_papi_hdr_ip_source = -1;
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static int hf_papi_hdr_port_destination = -1;
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static int hf_papi_hdr_port_source = -1;
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static int hf_papi_hdr_unknown = -1;
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static int hf_papi_hdr_sequence = -1;
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static int hf_papi_hdr_checksum = -1;
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static int hf_papi_debug = -1;
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static int hf_papi_debug_text = -1;
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static int hf_papi_debug_text_length = -1;
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static int hf_papi_debug_48bits = -1;
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static int hf_papi_debug_8bits = -1;
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static int hf_papi_debug_16bits = -1;
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static int hf_papi_debug_32bits = -1;
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static int hf_papi_debug_ipv4 = -1;
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static int hf_papi_debug_64bits = -1;
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static int hf_papi_debug_bytes = -1;
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static int hf_papi_debug_bytes_length = -1;
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/* Global PAPI Debug Preference */
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static gboolean g_papi_debug = FALSE;
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static dissector_handle_t data_handle;
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/* Initialize the subtree pointers */
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static gint ett_papi = -1;
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/* PAPI Debug loop ! */
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static int
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dissect_papi_debug(tvbuff_t *tvb, guint offset, proto_tree *tree)
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{
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proto_item *ti;
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proto_tree *debug_tree, *debug_sub_tree;
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ti = proto_tree_add_item(tree, hf_papi_debug, tvb, offset, -1, FALSE);
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debug_tree = proto_item_add_subtree(ti, ett_papi);
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while(offset < tvb_reported_length(tvb)) {
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switch(tvb_get_guint8(tvb,offset)) {
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case 0x00:
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ti = proto_tree_add_item(debug_tree, hf_papi_debug_text, tvb, offset+3, tvb_get_ntohs(tvb,offset+1), FALSE);
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debug_sub_tree = proto_item_add_subtree(ti, ett_papi);
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proto_tree_add_item(debug_sub_tree, hf_papi_debug_text_length, tvb, offset+1, 2, FALSE);
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offset += tvb_get_ntohs(tvb, offset+1) + 3;
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break;
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case 0x01:
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proto_tree_add_item(debug_tree, hf_papi_debug_48bits, tvb, offset+1, 6, FALSE);
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offset += 7;
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break;
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case 0x02:
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proto_tree_add_item(debug_tree, hf_papi_debug_8bits, tvb, offset+1, 1, FALSE);
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offset += 2;
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break;
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case 0x03:
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proto_tree_add_item(debug_tree, hf_papi_debug_16bits, tvb, offset+1, 2, FALSE);
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offset += 3;
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break;
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case 0x04:
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proto_tree_add_item(debug_tree, hf_papi_debug_32bits, tvb, offset+1, 4, FALSE);
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offset += 5;
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break;
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case 0x05:
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proto_tree_add_item(debug_tree, hf_papi_debug_ipv4, tvb, offset+1, 4, FALSE);
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offset += 5;
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break;
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case 0x07:
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proto_tree_add_item(debug_tree, hf_papi_debug_16bits, tvb, offset+1, 2, FALSE);
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offset += 3;
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break;
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case 0x08:
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ti = proto_tree_add_item(debug_tree, hf_papi_debug_bytes, tvb, offset+3, tvb_get_ntohs(tvb,offset+1), FALSE);
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debug_sub_tree = proto_item_add_subtree(ti, ett_papi);
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proto_tree_add_item(debug_sub_tree, hf_papi_debug_bytes_length, tvb, offset+1, 2, FALSE);
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offset += tvb_get_ntohs(tvb,offset+1) + 3;
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break;
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case 0x09:
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proto_tree_add_item(debug_tree, hf_papi_debug_64bits, tvb, offset+1, 8, FALSE);
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offset += 9;
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break;
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default:
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proto_tree_add_text(debug_tree, tvb, offset, 1, "Unknown (%d)", tvb_get_guint8(tvb, offset));
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offset +=1;
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}
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}
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return offset;
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}
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static gboolean
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dissect_papi(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 *papi_tree;
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guint offset = 0;
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tvbuff_t *next_tvb;
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/* All PAPI packet start with 0x4972 ! */
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if ( tvb_get_ntohs(tvb, offset) != 0x4972 )
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return FALSE;
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "PAPI");
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col_set_str(pinfo->cinfo, COL_INFO, "PAPI - Aruba AP Control Protocol");
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if (tree) {
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ti = proto_tree_add_item(tree, proto_papi, tvb, 0, -1, FALSE);
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papi_tree = proto_item_add_subtree(ti, ett_papi);
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proto_tree_add_item(papi_tree, hf_papi_hdr_id, tvb, offset, 2, FALSE);
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offset += 2;
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proto_tree_add_item(papi_tree, hf_papi_hdr_version, tvb, offset, 2, FALSE);
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offset += 2;
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proto_tree_add_item(papi_tree, hf_papi_hdr_ip_destination, tvb, offset, 4, FALSE);
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offset += 4;
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proto_tree_add_item(papi_tree, hf_papi_hdr_ip_source, tvb, offset, 4, FALSE);
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offset += 4;
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proto_tree_add_item(papi_tree, hf_papi_hdr_unknown, tvb, offset, 2, FALSE);
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offset += 2;
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proto_tree_add_item(papi_tree, hf_papi_hdr_unknown, tvb, offset, 2, FALSE);
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offset += 2;
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proto_tree_add_item(papi_tree, hf_papi_hdr_port_source, tvb, offset, 2, FALSE);
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offset += 2;
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proto_tree_add_item(papi_tree, hf_papi_hdr_port_destination, tvb, offset, 2, FALSE);
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offset += 2;
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proto_tree_add_item(papi_tree, hf_papi_hdr_unknown, tvb, offset, 2, FALSE);
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offset += 2;
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proto_tree_add_item(papi_tree, hf_papi_hdr_unknown, tvb, offset, 2, FALSE);
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offset += 2;
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proto_tree_add_item(papi_tree, hf_papi_hdr_sequence, tvb, offset, 2, FALSE);
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offset += 2;
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proto_tree_add_item(papi_tree, hf_papi_hdr_unknown, tvb, offset, 2, FALSE);
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offset += 2;
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proto_tree_add_item(papi_tree, hf_papi_hdr_checksum, tvb, offset, 16, FALSE);
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offset += 16;
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if(g_papi_debug)
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{
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offset = dissect_papi_debug(tvb, offset, papi_tree);
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}
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next_tvb = tvb_new_subset(tvb, offset, -1, -1);
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call_dissector(data_handle,next_tvb, pinfo, tree);
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}
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return(TRUE);
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}
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void
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proto_register_papi(void)
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{
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module_t *papi_module;
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static hf_register_info hf[] = {
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{ &hf_papi_hdr_id,
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{ "ID", "papi.hdr.id",
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FT_UINT16, BASE_HEX, NULL, 0x0,
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"PAPI Header ID (Magic Number ?)", HFILL }
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},
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{ &hf_papi_hdr_version,
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{ "Version", "papi.hdr.version",
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FT_UINT16, BASE_DEC, NULL, 0x0,
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"PAPI Protocol Version", HFILL }
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},
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{ &hf_papi_hdr_ip_destination,
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{ "IP Destination", "papi.hdr.ip.dst",
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FT_IPv4, BASE_NONE, NULL, 0x0,
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NULL, HFILL }
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},
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{ &hf_papi_hdr_ip_source,
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{ "IP Source", "papi.hdr.ip.src",
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FT_IPv4, BASE_NONE, NULL, 0x0,
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NULL, HFILL }
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},
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{ &hf_papi_hdr_port_source,
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{ "Port Source", "papi.hdr.port.src",
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FT_UINT16, BASE_DEC, NULL, 0x0,
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NULL, HFILL }
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},
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{ &hf_papi_hdr_port_destination,
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{ "Port Destination", "papi.hdr.port.destination",
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FT_UINT16, BASE_DEC, NULL, 0x0,
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NULL, HFILL }
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},
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{ &hf_papi_hdr_unknown,
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{ "Unknown", "papi.hdr.unknown",
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FT_UINT16, BASE_DEC|BASE_HEX, NULL, 0x0,
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NULL, HFILL }
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},
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{ &hf_papi_hdr_sequence,
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{ "Sequence", "papi.hdr.sequence",
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FT_UINT16, BASE_DEC, NULL, 0x0,
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NULL, HFILL }
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},
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{ &hf_papi_hdr_checksum,
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{ "Checksum", "papi.hdr.checksum",
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FT_BYTES, BASE_NONE, NULL, 0x0,
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NULL, HFILL }
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},
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{ &hf_papi_debug,
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{ "Debug", "papi.debug",
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FT_NONE, BASE_NONE, NULL, 0x0,
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NULL, HFILL }
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},
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{ &hf_papi_debug_text,
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{ "Debug (Text)", "papi.debug.text",
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FT_STRING, BASE_NONE, NULL, 0x0,
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NULL, HFILL }
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},
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{ &hf_papi_debug_text_length,
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{ "Debug Text Length", "papi.debug.text_length",
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FT_UINT16, BASE_DEC, NULL, 0x0,
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NULL, HFILL }
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},
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{ &hf_papi_debug_bytes,
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{ "Debug (Bytes)", "papi.debug.bytes",
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FT_BYTES, BASE_NONE, NULL, 0x0,
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NULL, HFILL }
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},
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{ &hf_papi_debug_bytes_length,
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{ "Debug Bytes Length", "papi.debug.bytes_length",
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FT_UINT16, BASE_DEC, NULL, 0x0,
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NULL, HFILL }
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},
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{ &hf_papi_debug_48bits,
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{ "Debug (48 Bits)", "papi.debug.48bits",
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FT_UINT64, BASE_DEC, NULL, 0x0,
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NULL, HFILL }
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},
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{ &hf_papi_debug_8bits,
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{ "Debug (8 Bits)", "papi.debug.8bits",
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FT_UINT8, BASE_DEC, NULL, 0x0,
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NULL, HFILL }
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},
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{ &hf_papi_debug_16bits,
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{ "Debug (16 Bits)", "papi.debug.16bits",
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FT_UINT16, BASE_DEC, NULL, 0x0,
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NULL, HFILL }
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},
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{ &hf_papi_debug_32bits,
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{ "Debug (32 Bits)", "papi.debug.32bits",
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FT_UINT32, BASE_DEC, NULL, 0x0,
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NULL, HFILL }
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},
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{ &hf_papi_debug_ipv4,
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{ "Debug (IPv4)", "papi.debug.ipv4",
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FT_IPv4, BASE_NONE, NULL, 0x0,
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NULL, HFILL }
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},
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{ &hf_papi_debug_64bits,
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{ "Debug (64 Bits)", "papi.debug.64bits",
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FT_UINT64, BASE_DEC, NULL, 0x0,
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NULL, HFILL }
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},
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};
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/* Setup protocol subtree array */
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static gint *ett[] = {
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&ett_papi
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};
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proto_papi = proto_register_protocol("Aruba PAPI", "PAPI", "papi");
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proto_register_field_array(proto_papi, hf, array_length(hf));
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proto_register_subtree_array(ett, array_length(ett));
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papi_module = prefs_register_protocol(proto_papi, NULL);
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prefs_register_bool_preference(papi_module, "experimental_decode",
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"Do experimental decode",
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"Attempt to decode parts of the message that aren't fully understood yet",
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&g_papi_debug);
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}
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void
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proto_reg_handoff_papi(void)
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{
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dissector_handle_t papi_handle;
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papi_handle = new_create_dissector_handle(dissect_papi, proto_papi);
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dissector_add_uint("udp.port", UDP_PORT_PAPI, papi_handle);
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data_handle = find_dissector("data");
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}
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