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wireshark/epan/dissectors/packet-forces.c

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/* packet-forces.c
* RFC 5810
* Routines for dissecting IETF ForCES protocol layer messages.Now support the following TML types:TCP+UDP,SCTP.
* Copyright 2009, NDSC & Zhejiang Gongshang University,Fenggen Jia <fgjia@mail.zjgsu.edu.cn or fenggen.jia@gmail.com>
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include <epan/packet.h>
#include <epan/prefs.h>
#include <epan/expert.h>
void proto_register_forces(void);
void proto_reg_handoff_forces(void);
static dissector_handle_t ip_handle;
/* Initialize the ForCES protocol and registered fields */
static int proto_forces = -1;
/*Main header*/
static int hf_forces_version = -1;
static int hf_forces_rsvd = -1;
static int hf_forces_messagetype = -1;
static int hf_forces_sid = -1;
static int hf_forces_did = -1;
static int hf_forces_correlator = -1;
static int hf_forces_length = -1;
/*Flags*/
static int hf_forces_flags= -1;
static int hf_forces_flags_ack= -1;
static int hf_forces_flags_pri= -1;
static int hf_forces_flags_rsrvd= -1;
static int hf_forces_flags_em= -1;
static int hf_forces_flags_at= -1;
static int hf_forces_flags_tp= -1;
static int hf_forces_flags_reserved = -1;
static int hf_forces_tlv_type = -1;
static int hf_forces_tlv_length = -1;
/*Initiation of LFBSelect TLV*/
static int hf_forces_lfbselect_tlv_type_lfb_classid = -1;
static int hf_forces_lfbselect_tlv_type_lfb_instanceid = -1;
/*Initiation of Operation TLV*/
static int hf_forces_lfbselect_tlv_type_operation_type = -1;
static int hf_forces_lfbselect_tlv_type_operation_length = -1;
static int hf_forces_lfbselect_tlv_type_operation_path_type = -1;
static int hf_forces_lfbselect_tlv_type_operation_path_length = -1;
static int hf_forces_lfbselect_tlv_type_operation_path_flags = -1;
static int hf_forces_lfbselect_tlv_type_operation_path_flags_selector = -1;
static int hf_forces_lfbselect_tlv_type_operation_path_flags_reserved = -1;
static int hf_forces_lfbselect_tlv_type_operation_path_IDcount = -1;
static int hf_forces_lfbselect_tlv_type_operation_path_IDs = -1;
static int hf_forces_lfbselect_tlv_type_operation_path_data = -1;
/*Initiation of Redirect TLV*/
static int hf_forces_redirect_tlv_meta_data_tlv_type = -1;
static int hf_forces_redirect_tlv_meta_data_tlv_length = -1;
static int hf_forces_redirect_tlv_meta_data_tlv_meta_data_ilv = -1;
static int hf_forces_redirect_tlv_meta_data_tlv_meta_data_ilv_id = -1;
static int hf_forces_redirect_tlv_meta_data_tlv_meta_data_ilv_length = -1;
static int hf_forces_redirect_tlv_redirect_data_tlv_type = -1;
static int hf_forces_redirect_tlv_redirect_data_tlv_length = -1;
/*Initiation of ASResult TLV*/
static int hf_forces_asresult_association_setup_result = -1;
/*Initiation of ASTreason TLV*/
static int hf_forces_astreason_tlv_teardown_reason = -1;
/*Main TLV may be unknown*/
static int hf_forces_unknown_tlv = -1;
/*Message Types */
#define AssociationSetup 0x01
#define AssociationTeardown 0x02
#define Config 0x03
#define Query 0x04
#define EventNotification 0x05
#define PacketRedirect 0x06
#define Heartbeat 0x0F
#define AssociationSetupRepsonse 0x11
#define ConfigResponse 0x13
#define QueryResponse 0x14
/*TLV Types*/
#define Reserved 0x0000
#define REDIRECT_TLV 0x0001
#define ASResult_TLV 0x0010
#define ASTreason_TLV 0x0011
#define LFBselect_TLV 0x1000
#define PATH_DATA_TLV 0x0110
#define KEYINFO_TLV 0x0111
#define FULLDATA_TLV 0x0112
#define SPARSEDATA_TLV 0x0113
#define RESULT_TLV 0x0114
#define METADATA_TLV 0x0115
#define REDIRECTDATA_TLV 0x0116
/*Operation Type*/
#define Reserved 0x0000
#define SET 0x0001
#define SET_PROP 0x0002
#define SET_RESPONSE 0x0003
#define SET_PROP_RESPONSE 0x0004
#define DEL 0x0005
#define DEL_RESPONSE 0x0006
#define GET 0x0007
#define GET_PROP 0x0008
#define GET_RESPONSE 0x0009
#define GET_PROP_RESPONSE 0x000A
#define REPORT 0x000B
#define COMMIT 0x000C
#define COMMIT_RESPONSE 0x000D
#define TRCOMP 0x000E
#define FLAG_SELECTOR 0x8000
#define ForCES_HEADER_LENGTH 24
#define TLV_TL_LENGTH 4 /*Type+length*/
#define MIN_IP_HEADER_LENGTH 20
/*For TCP+UDP TML. There are two bytes added to the ForCES PL message, not strictly combine to the ForCES protocol.
For other type TMLs,no need to add these 2 bytes.*/
#define TCP_UDP_TML_FOCES_MESSAGE_OFFSET_TCP 2
/*TCP+UDP TML*/
static guint forces_alternate_tcp_port = 0;
static guint forces_alternate_udp_port = 0;
/*SCTP TML*/
static guint forces_alternate_sctp_high_prio_channel_port = 0;
static guint forces_alternate_sctp_med_prio_channel_port = 0;
static guint forces_alternate_sctp_low_prio_channel_port = 0;
/*Initialize the subtree pointers*/
static gint ett_forces = -1;
static gint ett_forces_main_header = -1;
static gint ett_forces_flags = -1;
static gint ett_forces_tlv = -1;
static gint ett_forces_lfbselect_tlv_type = -1;
/*Operation TLV subtree*/
static gint ett_forces_lfbselect_tlv_type_operation = -1;
static gint ett_forces_lfbselect_tlv_type_operation_path = -1;
static gint ett_forces_lfbselect_tlv_type_operation_path_data = -1;
static gint ett_forces_lfbselect_tlv_type_operation_path_data_path = -1;
static gint ett_forces_path_data_tlv = -1;
static gint ett_forces_path_data_tlv_flags = -1;
/*Selector subtree*/
static gint ett_forces_lfbselect_tlv_type_operation_path_selector = -1;
/*Redirect TLV subtree*/
static gint ett_forces_redirect_tlv_type = -1;
static gint ett_forces_redirect_tlv_meta_data_tlv = -1;
static gint ett_forces_redirect_tlv_meta_data_tlv_meta_data_ilv = -1;
static gint ett_forces_redirect_tlv_redirect_data_tlv = -1;
/*ASResult TLV subtree*/
static gint ett_forces_asresult_tlv = -1;
/*ASReason subtree*/
static gint ett_forces_astreason_tlv = -1;
/*Main_TLV unknown subtree*/
static gint ett_forces_unknown_tlv = -1;
static expert_field ei_forces_length = EI_INIT;
static expert_field ei_forces_tlv_type = EI_INIT;
static expert_field ei_forces_tlv_length = EI_INIT;
static expert_field ei_forces_lfbselect_tlv_type_operation_path_length = EI_INIT;
static expert_field ei_forces_lfbselect_tlv_type_operation_type = EI_INIT;
static expert_field ei_forces_redirect_tlv_redirect_data_tlv_length = EI_INIT;
/*ACK values and the strings to be displayed*/
static const value_string main_header_flags_ack_vals[] = {
{ 0x0, "NoACK" },
{ 0x1, "SuccessACK" },
{ 0x2, "FailureACK" },
{ 0x3, "AlwaysACK" },
{ 0, NULL}
};
/*Execution mode(EM) values and the strings to be displayed*/
static const value_string main_header_flags_em_vals[] = {
{ 0x0, "Reserved" },
{ 0x1, "Execute-all-or-none" },
{ 0x2, "Execute-until-failure" },
{ 0x3, "Continue-execute-on-failure" },
{ 0, NULL}
};
/*Transaction Phase values and the strings to be displayed*/
static const value_string main_header_flags_tp_vals[] = {
{ 0x0, "SOT (Start of Transaction)" },
{ 0x1, "MOT (Middle of Transaction)" },
{ 0x2, "EOT (End of Transaction)" },
{ 0x3, "ABT (Abort)" },
{ 0, NULL}
};
/*Atomic Transaction(AT) values and the strings to be displayed*/
static const value_string main_header_flags_at_vals[] = {
{ 0x0, "Stand-alone Message"},
{ 0x1, "2PC Transaction Message"},
{ 0, NULL}
};
/*Association Setup Result*/
static const value_string association_setup_result_at_vals[] = {
{ 0x0, "success"},
{ 0x1, "FE ID invalid"},
{ 0x2, "permission denied"},
{ 0, NULL},
};
/*Teardown Reason*/
static const value_string teardown_reason_at_vals[] = {
{ 0x0, "normal-teardown by administrator"},
{ 0x1, "error - loss of heartbeats"},
{ 0x2, "error - out of bandwidth"},
{ 0x3, "error - out of memory"},
{ 0x4, "error - application crash"},
{ 0x255, "error - other or unspecified"},
{ 0, NULL},
};
static const value_string message_type_vals[] = {
{ AssociationSetup, "AssociationSetup" },
{ AssociationTeardown, "AssociationTeardown" },
{ Config, "Config" },
{ Query, "Query" },
{ EventNotification, "EventNotification" },
{ PacketRedirect, "PacketRedirect" },
{ Heartbeat, "Heartbeat" },
{ AssociationSetupRepsonse, "AssociationSetupRepsonse" },
{ ConfigResponse, "ConfigResponse" },
{ QueryResponse, "QueryResponse" },
{ 0, NULL},
};
static const value_string tlv_type_vals[] = {
{ REDIRECT_TLV, "REDIRECT-TLV" },
{ ASResult_TLV, "ASResult-TLV" },
{ ASTreason_TLV, "ASTreason-TLV" },
{ LFBselect_TLV, "LFBselect-TLV" },
{ PATH_DATA_TLV, "PATH DATA-TLV" },
{ KEYINFO_TLV, "KEYINFO-TLV" },
{ FULLDATA_TLV, "FULLDATA-TLV" },
{ SPARSEDATA_TLV, "SPARSEDATA-TLV" },
{ RESULT_TLV, "RESULT-TLV" },
{ METADATA_TLV, "METADATA-TLV" },
{ REDIRECTDATA_TLV, "REDIRECTDATA-TLV" },
{ 0, NULL},
};
static const value_string operation_type_vals[] = {
{ Reserved, "Reserved" },
{ SET, "SET" },
{ SET_PROP, "SET-PROP" },
{ SET_RESPONSE, "SET-RESPONSE" },
{ SET_PROP_RESPONSE, "SET-PROP-RESPONSE" },
{ DEL, "DEL" },
{ DEL_RESPONSE, "DEL-RESPONSE" },
{ GET, "GET" },
{ GET_PROP, "GET-PROP" },
{ GET_RESPONSE, "GET-RESPONSE" },
{ GET_PROP_RESPONSE, "GET-PROP-RESPONSE" },
{ REPORT, "REPORT" },
{ COMMIT, "COMMIT" },
{ COMMIT_RESPONSE, "COMMIT-RESPONSE" },
{ TRCOMP, "TRCOMP" },
{ 0, NULL},
};
static void
dissect_path_data_tlv(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, gint offset)
{
proto_item *ti, *flag_item;
guint length_TLV, IDcount, i;
guint16 type, flag;
proto_tree *tlv_tree, *path_data_tree, *flag_tree;
while (tvb_reported_length_remaining(tvb, offset) >= TLV_TL_LENGTH)
{
tlv_tree = proto_tree_add_subtree(tree, tvb, offset, TLV_TL_LENGTH, ett_forces_path_data_tlv, &ti, "TLV");
type = tvb_get_ntohs(tvb, offset);
proto_tree_add_item(tlv_tree, hf_forces_lfbselect_tlv_type_operation_path_type,
tvb, offset, 2, ENC_BIG_ENDIAN);
length_TLV = tvb_get_ntohs(tvb, offset+2);
proto_tree_add_item(tlv_tree, hf_forces_lfbselect_tlv_type_operation_path_length,
tvb, offset+2, 2, ENC_BIG_ENDIAN);
if (length_TLV < TLV_TL_LENGTH)
{
expert_add_info_format(pinfo, ti, &ei_forces_lfbselect_tlv_type_operation_path_length, "Bogus TLV length: %u", length_TLV);
break;
}
proto_item_set_len(ti, length_TLV);
if (type == PATH_DATA_TLV)
{
path_data_tree = proto_tree_add_subtree(tree, tvb, offset+TLV_TL_LENGTH, length_TLV-TLV_TL_LENGTH,
ett_forces_path_data_tlv, NULL, "Path Data TLV");
flag = tvb_get_ntohs(tvb, offset+TLV_TL_LENGTH);
flag_item = proto_tree_add_item(path_data_tree, hf_forces_lfbselect_tlv_type_operation_path_flags,
tvb, offset+TLV_TL_LENGTH, 2, ENC_BIG_ENDIAN);
flag_tree = proto_item_add_subtree(flag_item, ett_forces_path_data_tlv_flags);
proto_tree_add_item(flag_tree, hf_forces_lfbselect_tlv_type_operation_path_flags_selector,
tvb, offset+TLV_TL_LENGTH, 2, ENC_BIG_ENDIAN);
proto_tree_add_item(flag_tree, hf_forces_lfbselect_tlv_type_operation_path_flags_reserved,
tvb, offset+TLV_TL_LENGTH, 2, ENC_BIG_ENDIAN);
IDcount = tvb_get_ntohs(tvb, offset + TLV_TL_LENGTH + 2);
proto_tree_add_item(path_data_tree, hf_forces_lfbselect_tlv_type_operation_path_IDcount,
tvb, offset+TLV_TL_LENGTH+2, 2, ENC_BIG_ENDIAN);
for (i = 0; i < IDcount; i++)
proto_tree_add_item(path_data_tree, hf_forces_lfbselect_tlv_type_operation_path_IDs,
tvb, offset+TLV_TL_LENGTH+2+(i*4), 4, ENC_BIG_ENDIAN);
}
else
{
flag = 0;
proto_tree_add_item(tree, hf_forces_lfbselect_tlv_type_operation_path_data,
tvb, offset+TLV_TL_LENGTH, length_TLV-TLV_TL_LENGTH, ENC_NA);
}
if ((flag & FLAG_SELECTOR) == 0)
break;
offset += length_TLV;
}
}
static void
dissect_operation_tlv(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, gint offset, gint length_count)
{
proto_item *ti;
proto_tree *oper_tree;
guint type, length;
while (tvb_reported_length_remaining(tvb, offset) >= TLV_TL_LENGTH)
{
oper_tree = proto_tree_add_subtree(tree, tvb, offset, length_count,
ett_forces_lfbselect_tlv_type_operation, &ti, "Operation TLV");
type = tvb_get_ntohs(tvb,offset);
ti = proto_tree_add_item(oper_tree, hf_forces_lfbselect_tlv_type_operation_type,
tvb, offset, 2, ENC_BIG_ENDIAN);
if (try_val_to_str(type, operation_type_vals) == NULL)
expert_add_info_format(pinfo, ti, &ei_forces_lfbselect_tlv_type_operation_type,
"Bogus: ForCES Operation TLV (Type:0x%04x) is not supported", type);
length = tvb_get_ntohs(tvb, offset+2);
proto_tree_add_uint_format_value(oper_tree, hf_forces_lfbselect_tlv_type_operation_length,
tvb, offset+2, 2, length, "%u Bytes", length);
dissect_path_data_tlv(tvb, pinfo, oper_tree, offset+TLV_TL_LENGTH);
if (length == 0)
break;
offset += length;
}
}
static void
dissect_lfbselecttlv(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, gint offset, gint length_count)
{
guint tlv_length;
proto_tree_add_item(tree, hf_forces_lfbselect_tlv_type_lfb_classid, tvb, offset, 4, ENC_BIG_ENDIAN);
proto_tree_add_item(tree, hf_forces_lfbselect_tlv_type_lfb_instanceid, tvb, offset+4, 4, ENC_BIG_ENDIAN);
offset += 8;
while ((tvb_reported_length_remaining(tvb, offset) > TLV_TL_LENGTH) && (length_count > 12))
{
tlv_length = tvb_get_ntohs(tvb, offset+2);
dissect_operation_tlv(tvb, pinfo, tree, offset, tlv_length);
if (tlv_length == 0)
break;
offset += tlv_length;
}
}
static void
dissect_redirecttlv(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, gint offset)
{
proto_tree *meta_data_tree, *meta_data_ilv_tree, *redirect_data_tree;
gint start_offset;
gint length_meta, length_ilv, length_redirect;
proto_item *ti;
address src_addr = pinfo->src,
src_net_addr = pinfo->net_src,
dst_addr = pinfo->dst,
dst_net_addr = pinfo->net_dst;
meta_data_tree = proto_tree_add_subtree(tree, tvb, offset, TLV_TL_LENGTH,
ett_forces_redirect_tlv_meta_data_tlv, &ti, "Meta Data TLV");
proto_tree_add_item(meta_data_tree, hf_forces_redirect_tlv_meta_data_tlv_type, tvb, offset, 2, ENC_BIG_ENDIAN);
length_meta = tvb_get_ntohs(tvb, offset+2);
proto_tree_add_uint_format_value(meta_data_tree, hf_forces_redirect_tlv_meta_data_tlv_length, tvb, offset+2, 2,
length_meta, "%u Bytes", length_meta);
proto_item_set_len(ti, length_meta);
start_offset = offset;
while ((tvb_reported_length_remaining(tvb, offset) >= 8) && (start_offset+length_meta > offset))
{
meta_data_ilv_tree = proto_tree_add_subtree(tree, tvb, offset, TLV_TL_LENGTH,
ett_forces_redirect_tlv_meta_data_tlv_meta_data_ilv, &ti, "Meta Data ILV");
proto_tree_add_item(meta_data_ilv_tree, hf_forces_redirect_tlv_meta_data_tlv_meta_data_ilv_id,
tvb, offset+8, 4, ENC_BIG_ENDIAN);
length_ilv = tvb_get_ntohl(tvb, offset+12);
proto_tree_add_uint_format_value(meta_data_ilv_tree, hf_forces_redirect_tlv_meta_data_tlv_meta_data_ilv_length,
tvb, offset+12, 4, length_ilv, "%u Bytes", length_ilv);
offset += 8;
if (length_ilv > 0) {
proto_tree_add_item(meta_data_ilv_tree, hf_forces_redirect_tlv_meta_data_tlv_meta_data_ilv,
tvb, offset, length_ilv, ENC_NA);
if (offset + length_ilv > offset) {
offset += length_ilv;
}
}
proto_item_set_len(ti, length_ilv + 8);
}
if (tvb_reported_length_remaining(tvb, offset) > 0)
{
redirect_data_tree = proto_tree_add_subtree(tree, tvb, offset, TLV_TL_LENGTH,
ett_forces_redirect_tlv_redirect_data_tlv, &ti, "Redirect Data TLV");
proto_tree_add_item(redirect_data_tree, hf_forces_redirect_tlv_redirect_data_tlv_type,
tvb, offset, 2, ENC_BIG_ENDIAN);
length_redirect = tvb_get_ntohs(tvb, offset+2);
proto_tree_add_uint_format_value(redirect_data_tree, hf_forces_redirect_tlv_redirect_data_tlv_length,
tvb, offset+2, 2, length_redirect, "%u Bytes", length_redirect);
if (tvb_reported_length_remaining(tvb, offset) < length_redirect)
{
expert_add_info_format(pinfo, ti, &ei_forces_redirect_tlv_redirect_data_tlv_length, "Bogus: Redirect Data TLV length (%u bytes) is wrong", length_redirect);
}
else if (length_redirect < TLV_TL_LENGTH + MIN_IP_HEADER_LENGTH)
{
expert_add_info_format(pinfo, ti, &ei_forces_redirect_tlv_redirect_data_tlv_length, "Bogus: Redirect Data TLV length (%u bytes) not big enough for IP layer", length_redirect);
}
else
{
tvbuff_t *next_tvb;
next_tvb = tvb_new_subset_length(tvb, offset+4, length_redirect-TLV_TL_LENGTH);
call_dissector(ip_handle, next_tvb, pinfo, redirect_data_tree);
/* Restore IP info */
memcpy(&(pinfo->src), &src_addr, sizeof(address));
memcpy(&(pinfo->net_src), &src_net_addr, sizeof(address));
memcpy(&(pinfo->dst), &dst_addr, sizeof(address));
memcpy(&(pinfo->net_dst), &dst_net_addr, sizeof(address));
}
}
}
static void
dissect_forces(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, guint32 offset)
{
/* Set up structures needed to add the protocol subtree and manage it */
proto_item *ti, *tlv_item;
proto_tree *forces_tree, *forces_flags_tree;
proto_tree *forces_main_header_tree, *forces_tlv_tree, *tlv_tree;
gint length_count;
guint8 message_type;
guint16 tlv_type;
/* Make entries in Protocol column and Info column on summary display */
col_set_str(pinfo->cinfo, COL_PROTOCOL, "ForCES");
col_clear(pinfo->cinfo, COL_INFO);
ti = proto_tree_add_item(tree, proto_forces, tvb, 0, -1, ENC_NA);
forces_tree = proto_item_add_subtree(ti, ett_forces);
forces_main_header_tree = proto_tree_add_subtree(forces_tree, tvb, 0, ForCES_HEADER_LENGTH,
ett_forces_main_header, NULL, "Common Header");
proto_tree_add_item(forces_main_header_tree, hf_forces_version, tvb, 0, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(forces_main_header_tree, hf_forces_rsvd, tvb, 0, 1, ENC_BIG_ENDIAN);
message_type = tvb_get_guint8(tvb, offset+1);
proto_tree_add_item( forces_main_header_tree, hf_forces_messagetype, tvb, offset+1, 1, ENC_BIG_ENDIAN);
length_count = tvb_get_ntohs(tvb, offset+2) * 4; /*multiply 4 DWORD*/
ti = proto_tree_add_uint_format( forces_main_header_tree, hf_forces_length,
tvb, offset+2, 2, length_count, "Length: %u Bytes", length_count);
if (length_count != tvb_reported_length_remaining(tvb, offset))
expert_add_info_format(pinfo, ti, &ei_forces_length, "Bogus: ForCES Header length (%u bytes) is wrong),should be (%u bytes)",
length_count, tvb_reported_length_remaining(tvb, offset));
if (length_count < 24)
expert_add_info_format(pinfo, ti, &ei_forces_length, "Bogus: ForCES Header length (%u bytes) is less than 24bytes)", length_count);
col_add_fstr(pinfo->cinfo, COL_INFO, "Message Type: %s, Total Length: %u Bytes",
val_to_str(message_type, message_type_vals, "Unknown messagetype 0x%x"), length_count);
proto_tree_add_item( forces_main_header_tree, hf_forces_sid, tvb, offset+4, 4, ENC_BIG_ENDIAN);
proto_tree_add_item( forces_main_header_tree, hf_forces_did, tvb, offset+8, 4, ENC_BIG_ENDIAN);
proto_tree_add_item( forces_main_header_tree, hf_forces_correlator, tvb, offset+12, 8, ENC_BIG_ENDIAN);
/*Add flags tree*/
ti = proto_tree_add_item(forces_main_header_tree, hf_forces_flags, tvb, offset+20, 4, ENC_BIG_ENDIAN);
forces_flags_tree = proto_item_add_subtree(ti, ett_forces_flags);
proto_tree_add_item(forces_flags_tree, hf_forces_flags_ack, tvb, offset+20, 4, ENC_BIG_ENDIAN);
proto_tree_add_item(forces_flags_tree, hf_forces_flags_at, tvb, offset+20, 4, ENC_BIG_ENDIAN);
proto_tree_add_item(forces_flags_tree, hf_forces_flags_em, tvb, offset+20, 4, ENC_BIG_ENDIAN);
proto_tree_add_item(forces_flags_tree, hf_forces_flags_pri, tvb, offset+20, 4, ENC_BIG_ENDIAN);
proto_tree_add_item(forces_flags_tree, hf_forces_flags_reserved, tvb, offset+20, 4, ENC_BIG_ENDIAN);
proto_tree_add_item(forces_flags_tree, hf_forces_flags_rsrvd, tvb, offset+20, 4, ENC_BIG_ENDIAN);
proto_tree_add_item(forces_flags_tree, hf_forces_flags_tp, tvb, offset+20, 4, ENC_BIG_ENDIAN);
offset += 24;
while (tvb_reported_length_remaining(tvb, offset) >= TLV_TL_LENGTH)
{
forces_tlv_tree = proto_tree_add_subtree(forces_tree, tvb, offset, TLV_TL_LENGTH, ett_forces_tlv, &ti, "TLV");
tlv_type = tvb_get_ntohs(tvb, offset);
tlv_item = proto_tree_add_item(forces_tlv_tree, hf_forces_tlv_type, tvb, offset, 2, ENC_BIG_ENDIAN);
length_count = tvb_get_ntohs(tvb, offset+2) * 4;
proto_item_set_len(ti, length_count);
ti = proto_tree_add_uint_format_value(forces_tlv_tree, hf_forces_tlv_length,
tvb, offset+2, 2, length_count, "%u Bytes", length_count);
if (tvb_reported_length_remaining(tvb, offset) < length_count)
expert_add_info_format(pinfo, ti, &ei_forces_tlv_length, "Bogus: Main TLV length (%u bytes) is wrong", length_count);
if (length_count < TLV_TL_LENGTH)
{
expert_add_info_format(pinfo, ti, &ei_forces_tlv_length, "Bogus TLV length: %u", length_count);
break;
}
offset += TLV_TL_LENGTH;
length_count -= TLV_TL_LENGTH;
switch(tlv_type)
{
case LFBselect_TLV:
tlv_tree = proto_tree_add_subtree(forces_tlv_tree, tvb, offset, length_count,
ett_forces_lfbselect_tlv_type, NULL, "LFB select TLV");
dissect_lfbselecttlv(tvb, pinfo, tlv_tree, offset, length_count);
break;
case REDIRECT_TLV:
tlv_tree = proto_tree_add_subtree(forces_tlv_tree, tvb, offset, length_count,
ett_forces_redirect_tlv_type, NULL, "Redirect TLV");
dissect_redirecttlv(tvb, pinfo, tlv_tree, offset);
break;
case ASResult_TLV:
tlv_tree = proto_tree_add_subtree(forces_tlv_tree, tvb, offset, length_count,
ett_forces_asresult_tlv, NULL, "ASResult TLV");
proto_tree_add_item(tlv_tree, hf_forces_asresult_association_setup_result, tvb, offset, 4, ENC_BIG_ENDIAN);
break;
case ASTreason_TLV:
tlv_tree = proto_tree_add_subtree(forces_tlv_tree, tvb, offset, length_count,
ett_forces_astreason_tlv, NULL, "ASTreason TLV");
proto_tree_add_item(tlv_tree, hf_forces_astreason_tlv_teardown_reason, tvb, offset, 4, ENC_BIG_ENDIAN);
break;
default:
expert_add_info(pinfo, tlv_item, &ei_forces_tlv_type);
tlv_tree = proto_tree_add_subtree(forces_tlv_tree, tvb, offset, length_count,
ett_forces_unknown_tlv, NULL, "Unknown TLV");
proto_tree_add_item(tlv_tree, hf_forces_unknown_tlv, tvb, offset, length_count, ENC_NA);
break;
}
offset += length_count;
}
}
/* Code to actually dissect the TCP packets */
static int
dissect_forces_tcp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
dissect_forces(tvb, pinfo, tree, TCP_UDP_TML_FOCES_MESSAGE_OFFSET_TCP);
return tvb_captured_length(tvb);
}
/* Code to actually dissect the ForCES protocol layer packets,like UDP,SCTP and others */
static int
dissect_forces_not_tcp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
dissect_forces(tvb, pinfo, tree, 0);
return tvb_captured_length(tvb);
}
void
proto_register_forces(void)
{
module_t *forces_module;
expert_module_t* expert_forces;
/* Setup list of header fields See Section 1.6.1 for details*/
static hf_register_info hf[] = {
{ &hf_forces_version,
{ "Version", "forces.flags.version",
FT_UINT8, BASE_DEC, NULL, 0xF0, NULL, HFILL }
},
{ &hf_forces_rsvd,
{ "Rsvd", "forces.flags.rsvd",
FT_UINT8, BASE_DEC, NULL, 0x0F, NULL, HFILL }
},
{ &hf_forces_messagetype,
{ "Message Type", "forces.messagetype",
FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }
},
{ &hf_forces_length,
{ "Header Length", "forces.length",
FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }
},
{ &hf_forces_sid,
{ "Source ID", "forces.sid",
FT_IPv4, BASE_NONE, NULL, 0x0, NULL, HFILL }
},
{ &hf_forces_did,
{ "Destination ID", "forces.did",
FT_IPv4, BASE_NONE, NULL, 0x0, NULL, HFILL }
},
{ &hf_forces_correlator,
{ "Correlator", "forces.correlator",
FT_UINT64, BASE_HEX, NULL, 0x0, NULL, HFILL }
},
{ &hf_forces_tlv_type,
{ "Type", "forces.tlv.type",
FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }
},
{ &hf_forces_tlv_length,
{ "Length", "forces.tlv.length",
FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }
},
/*flags*/
{ &hf_forces_flags,
{ "Flags", "forces.Flags",
FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }
},
{ &hf_forces_flags_ack,
{ "ACK indicator", "forces.flags.ack",
FT_UINT32, BASE_DEC, VALS(main_header_flags_ack_vals), 0xC0000000, NULL, HFILL }
},
{ &hf_forces_flags_pri,
{ "Priority", "forces.flags.pri",
FT_UINT32, BASE_DEC, NULL, 0x38000000, NULL, HFILL }
},
{ &hf_forces_flags_rsrvd,
{ "Rsrvd", "forces.Flags",
FT_UINT32, BASE_DEC,NULL, 0x07000000, NULL, HFILL }
},
{ &hf_forces_flags_em,
{ "Execution mode", "forces.flags.em",
FT_UINT32, BASE_DEC, VALS(main_header_flags_em_vals), 0x00C00000, NULL, HFILL }
},
{ &hf_forces_flags_at,
{ "Atomic Transaction", "forces.flags.at",
FT_UINT32, BASE_DEC, VALS(main_header_flags_at_vals), 0x00200000, NULL, HFILL }
},
{ &hf_forces_flags_tp,
{ "Transaction phase", "forces.flags.tp",
FT_UINT32, BASE_DEC, VALS(main_header_flags_tp_vals), 0x00180000, NULL, HFILL }
},
{ &hf_forces_flags_reserved,
{ "Reserved", "forces.flags.reserved",
FT_UINT32, BASE_DEC,NULL, 0x0007ffff, NULL, HFILL }
},
/*LFBSelectTLV*/
{ &hf_forces_lfbselect_tlv_type_lfb_classid,
{ "Class ID", "forces.lfbselect.tlv.type.lfb.classid",
FT_IPv4, BASE_NONE, NULL, 0x0, NULL, HFILL }
},
{ &hf_forces_lfbselect_tlv_type_lfb_instanceid,
{ "Instance ID", "forces.fbselect.tlv.type.lfb.instanceid",
FT_IPv4, BASE_NONE, NULL, 0x0, NULL, HFILL }
},
/*Operation TLV*/
{ &hf_forces_lfbselect_tlv_type_operation_type,
{ "Type", "forces.lfbselect.tlv.type.operation.type",
FT_UINT16, BASE_DEC, VALS(operation_type_vals), 0x0, NULL, HFILL }
},
{ &hf_forces_lfbselect_tlv_type_operation_length,
{ "Length", "forces.lfbselect.tlv.type.operation.length",
FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }
},
{ &hf_forces_lfbselect_tlv_type_operation_path_type,
{ "Type", "forces.lfbselect.tlv.type.operation.path.type",
FT_UINT16, BASE_DEC, VALS(tlv_type_vals), 0x0, NULL, HFILL }
},
{ &hf_forces_lfbselect_tlv_type_operation_path_length,
{ "Length", "forces.lfbselect.tlv.type.operation.path.length",
FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }
},
{ &hf_forces_lfbselect_tlv_type_operation_path_data,
{ "Data", "forces.lfbselect.tlv.type.operation.path.data",
FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }
},
{ &hf_forces_lfbselect_tlv_type_operation_path_flags,
{"Path Data Flags", "forces.lfbselect.tlv.type.operation.path.data.flags",
FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL }
},
{ &hf_forces_lfbselect_tlv_type_operation_path_flags_selector,
{"Selector", "forces.lfbselect.tlv.type.operation.path.data.flags.selector",
FT_UINT16, BASE_HEX, NULL, 0x80, NULL, HFILL }
},
{ &hf_forces_lfbselect_tlv_type_operation_path_flags_reserved,
{"Reserved", "forces.lfbselect.tlv.type.operation.path.data.flags.reserved",
FT_UINT16, BASE_HEX, NULL, 0x7F, NULL, HFILL }
},
{ &hf_forces_lfbselect_tlv_type_operation_path_IDcount,
{ "Path Data IDcount", "forces.lfbselect.tlv.type.operation.path.data.IDcount",
FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }
},
{ &hf_forces_lfbselect_tlv_type_operation_path_IDs,
{ "Path Data IDs", "forces.lfbselect.tlv.type.operation.path.data.IDs",
FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }
},
/*Meta data TLV*/
{&hf_forces_redirect_tlv_meta_data_tlv_type,
{ "Type", "forces.redirect.tlv.meta.data.tlv.type",
FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }
},
{ &hf_forces_redirect_tlv_meta_data_tlv_length,
{ "Length", "forces.redirect.tlv.meta.data.tlv.length",
FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }
},
{ &hf_forces_redirect_tlv_meta_data_tlv_meta_data_ilv,
{ "Meta Data ILV", "forces.redirect.tlv.meta.data.tlv.meta.data.ilv",
FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }
},
{ &hf_forces_redirect_tlv_meta_data_tlv_meta_data_ilv_id,
{ "ID", "forces.redirect.tlv.meta.data.tlv.meta.data.ilv.id",
FT_UINT32, BASE_HEX_DEC, NULL, 0x0, NULL, HFILL }
},
{ &hf_forces_redirect_tlv_meta_data_tlv_meta_data_ilv_length,
{ "Length", "forces.redirect.tlv.meta.data.tlv.meta.data.ilv.length",
FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }
},
{ &hf_forces_redirect_tlv_redirect_data_tlv_type,
{ "Type", "forces.redirect.tlv.redirect.data.tlv.type",
FT_UINT16, BASE_DEC, VALS(tlv_type_vals), 0x0, NULL, HFILL }
},
{ &hf_forces_redirect_tlv_redirect_data_tlv_length,
{ "Length", "forces.redirect.tlv.redirect.data.tlv.length",
FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }
},
{ &hf_forces_asresult_association_setup_result,
{ "Association Setup Result", "forces.teardown.reason",
FT_UINT32, BASE_DEC, VALS(association_setup_result_at_vals), 0x0, NULL, HFILL }
},
{ &hf_forces_astreason_tlv_teardown_reason,
{ "AStreason TLV TearDown Reason", "forces.astreason.tlv.teardown.reason",
FT_UINT32, BASE_DEC, VALS(teardown_reason_at_vals), 0x0, NULL, HFILL }
},
{ &hf_forces_unknown_tlv,
{ "Data", "forces.unknown.tlv",
FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }
}
};
/* Setup protocol subtree array */
static gint *ett[] = {
&ett_forces,
&ett_forces_main_header,
&ett_forces_flags,
&ett_forces_tlv,
&ett_forces_lfbselect_tlv_type,
&ett_forces_lfbselect_tlv_type_operation,
&ett_forces_lfbselect_tlv_type_operation_path,
&ett_forces_lfbselect_tlv_type_operation_path_data,
&ett_forces_lfbselect_tlv_type_operation_path_data_path,
&ett_forces_lfbselect_tlv_type_operation_path_selector,
&ett_forces_path_data_tlv,
&ett_forces_path_data_tlv_flags,
&ett_forces_redirect_tlv_type,
&ett_forces_redirect_tlv_meta_data_tlv,
&ett_forces_redirect_tlv_redirect_data_tlv,
&ett_forces_redirect_tlv_meta_data_tlv_meta_data_ilv,
&ett_forces_asresult_tlv,
&ett_forces_astreason_tlv,
&ett_forces_unknown_tlv
};
static ei_register_info ei[] = {
{ &ei_forces_length, { "forces.length.bad", PI_PROTOCOL, PI_WARN, "ForCES Header length is wrong", EXPFILL }},
{ &ei_forces_tlv_type, { "forces.tlv.type.unknown", PI_PROTOCOL, PI_WARN, "Bogus: The Main_TLV type is unknown", EXPFILL }},
{ &ei_forces_tlv_length, { "forces.tlv.length.bad", PI_PROTOCOL, PI_WARN, "Bogus TLV length", EXPFILL }},
{ &ei_forces_lfbselect_tlv_type_operation_path_length, { "forces.lfbselect.tlv.type.operation.path.length.bad", PI_PROTOCOL, PI_WARN, "Bogus TLV length", EXPFILL }},
{ &ei_forces_lfbselect_tlv_type_operation_type, { "forces.lfbselect.tlv.type.operation.type.unsupported", PI_PROTOCOL, PI_WARN, "ForCES Operation TLV is not supported", EXPFILL }},
{ &ei_forces_redirect_tlv_redirect_data_tlv_length, { "forces.redirect.tlv.redirect.data.tlv.length.bad", PI_PROTOCOL, PI_WARN, "Redirect Data TLV length is wrong", EXPFILL }},
};
/* Register the protocol name and description */
proto_forces = proto_register_protocol("Forwarding and Control Element Separation Protocol", "ForCES", "forces");
/* Required function calls to register the header fields and subtrees used */
proto_register_field_array(proto_forces, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
expert_forces = expert_register_protocol(proto_forces);
expert_register_field_array(expert_forces, ei, array_length(ei));
forces_module = prefs_register_protocol(proto_forces,proto_reg_handoff_forces);
prefs_register_uint_preference(forces_module, "tcp_alternate_port",
"TCP port",
"Decode packets on this TCP port as ForCES",
10, &forces_alternate_tcp_port);
prefs_register_uint_preference(forces_module, "udp_alternate_port",
"UDP port",
"Decode packets on this UDP port as ForCES",
10, &forces_alternate_udp_port);
prefs_register_uint_preference(forces_module, "sctp_high_prio_port",
"SCTP High Priority channel port",
"Decode packets on this sctp port as ForCES",
10, &forces_alternate_sctp_high_prio_channel_port);
prefs_register_uint_preference(forces_module, "sctp_med_prio_port",
"SCTP Meidium Priority channel port",
"Decode packets on this sctp port as ForCES",
10, &forces_alternate_sctp_med_prio_channel_port);
prefs_register_uint_preference(forces_module, "sctp_low_prio_port",
"SCTP Low Priority channel port",
"Decode packets on this sctp port as ForCES",
10, &forces_alternate_sctp_low_prio_channel_port);
}
void
proto_reg_handoff_forces(void)
{
static gboolean inited = FALSE;
static guint alternate_tcp_port = 0; /* 3000 */
static guint alternate_udp_port = 0;
static guint alternate_sctp_high_prio_channel_port = 0; /* 6700 */
static guint alternate_sctp_med_prio_channel_port = 0;
static guint alternate_sctp_low_prio_channel_port = 0;
static dissector_handle_t forces_handle_tcp, forces_handle;
if (!inited) {
forces_handle_tcp = create_dissector_handle(dissect_forces_tcp, proto_forces);
forces_handle = create_dissector_handle(dissect_forces_not_tcp, proto_forces);
ip_handle = find_dissector("ip");
inited = TRUE;
}
/* Register TCP port for dissection */
if ((alternate_tcp_port != 0) && (alternate_tcp_port != forces_alternate_tcp_port))
dissector_delete_uint("tcp.port", alternate_tcp_port, forces_handle_tcp);
if ((forces_alternate_tcp_port != 0) && (alternate_tcp_port != forces_alternate_tcp_port))
dissector_add_uint("tcp.port", forces_alternate_tcp_port, forces_handle_tcp);
alternate_tcp_port = forces_alternate_tcp_port;
/* Register UDP port for dissection */
if ((alternate_udp_port != 0) && (alternate_udp_port != forces_alternate_udp_port))
dissector_delete_uint("udp.port", alternate_udp_port, forces_handle);
if ((forces_alternate_udp_port != 0) && (alternate_udp_port != forces_alternate_udp_port))
dissector_add_uint("udp.port", forces_alternate_udp_port, forces_handle);
alternate_udp_port = forces_alternate_udp_port;
/* Register SCTP port for high priority dissection */
if ((alternate_sctp_high_prio_channel_port != 0) &&
(alternate_sctp_high_prio_channel_port != forces_alternate_sctp_high_prio_channel_port))
dissector_delete_uint("sctp.port", alternate_sctp_high_prio_channel_port, forces_handle);
if ((forces_alternate_sctp_high_prio_channel_port != 0) &&
(alternate_sctp_high_prio_channel_port != forces_alternate_sctp_high_prio_channel_port))
dissector_add_uint("sctp.port", forces_alternate_sctp_high_prio_channel_port, forces_handle);
alternate_sctp_high_prio_channel_port = forces_alternate_sctp_high_prio_channel_port;
/* Register SCTP port for medium priority dissection */
if ((alternate_sctp_med_prio_channel_port != 0) &&
(alternate_sctp_med_prio_channel_port != forces_alternate_sctp_med_prio_channel_port))
dissector_delete_uint("sctp.port", alternate_sctp_med_prio_channel_port, forces_handle);
if ((forces_alternate_sctp_med_prio_channel_port != 0) &&
(alternate_sctp_med_prio_channel_port != forces_alternate_sctp_med_prio_channel_port))
dissector_add_uint("sctp.port", forces_alternate_sctp_med_prio_channel_port, forces_handle);
alternate_sctp_med_prio_channel_port = forces_alternate_sctp_med_prio_channel_port;
/* Register SCTP port for low priority dissection */
if ((alternate_sctp_low_prio_channel_port != 0) &&
(alternate_sctp_low_prio_channel_port != forces_alternate_sctp_low_prio_channel_port))
dissector_delete_uint("sctp.port", alternate_sctp_low_prio_channel_port, forces_handle);
if ((forces_alternate_sctp_low_prio_channel_port != 0) &&
(alternate_sctp_low_prio_channel_port != forces_alternate_sctp_low_prio_channel_port))
dissector_add_uint("sctp.port", forces_alternate_sctp_low_prio_channel_port, forces_handle);
alternate_sctp_low_prio_channel_port = forces_alternate_sctp_low_prio_channel_port;
}
/*
* Editor modelines - http://www.wireshark.org/tools/modelines.html
*
* Local variables:
* c-basic-offset: 4
* tab-width: 8
* indent-tabs-mode: nil
* End:
*
* vi: set shiftwidth=4 tabstop=8 expandtab:
* :indentSize=4:tabSize=8:noTabs=true:
*/
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