forked from osmocom/wireshark
d62f730035
protocols running atop SCTP can register themselves with a particular SCTP port number. Also, clean up the credits for him - there were two entries, one for some initial SCTP support in "ipprotostr()" and in the capture dialog, and one for the SCTP dissector itself - the latter subsumes the former, so just keep the latter. svn path=/trunk/; revision=2296
1825 lines
69 KiB
C
1825 lines
69 KiB
C
/* packet-sctp.c
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* Routines for Stream Control Transmission Protocol dissection
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* Copyright 2000, Michael Tüxen <Michael.Tuexen@icn.siemens.de>
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*
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* $Id: packet-sctp.c,v 1.6 2000/08/19 08:37:36 guy Exp $
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@unicom.net>
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* Copyright 1998 Gerald Combs
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*
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* Copied from README.developer
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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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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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#include <stdio.h>
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#include <stdlib.h>
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#ifdef HAVE_SYS_TYPES_H
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# include <sys/types.h>
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#endif
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#ifdef HAVE_NETINET_IN_H
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# include <netinet/in.h>
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#endif
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#include <string.h>
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#include <glib.h>
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#ifdef NEED_SNPRINTF_H
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# include "snprintf.h"
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#endif
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#include "packet.h"
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#include "packet-ip.h"
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/* Initialize the protocol and registered fields */
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static int proto_sctp = -1;
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static int hf_sctp_source_port = -1;
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static int hf_sctp_destination_port = -1;
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static int hf_sctp_verification_tag = -1;
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static int hf_sctp_checksum = -1;
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static int hf_sctp_chunk_type = -1;
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static int hf_sctp_chunk_flags = -1;
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static int hf_sctp_chunk_length = -1;
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static int hf_sctp_init_chunk_initiate_tag = -1;
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static int hf_sctp_init_chunk_adv_rec_window_credit = -1;
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static int hf_sctp_init_chunk_number_of_outbound_streams = -1;
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static int hf_sctp_init_chunk_number_of_inbound_streams = -1;
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static int hf_sctp_init_chunk_initial_tsn = -1;
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static int hf_sctp_cumulative_tsn_ack = -1;
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static int hf_sctp_data_chunk_tsn = -1;
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static int hf_sctp_data_chunk_stream_id = -1;
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static int hf_sctp_data_chunk_stream_seq_number = -1;
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static int hf_sctp_data_chunk_payload_proto_id = -1;
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static int hf_sctp_data_chunk_e_bit = -1;
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static int hf_sctp_data_chunk_b_bit = -1;
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static int hf_sctp_data_chunk_u_bit = -1;
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static int hf_sctp_sack_chunk_cumulative_tsn_ack = -1;
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static int hf_sctp_sack_chunk_adv_rec_window_credit = -1;
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static int hf_sctp_sack_chunk_number_of_gap_blocks = -1;
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static int hf_sctp_sack_chunk_number_of_dup_tsns = -1;
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static int hf_sctp_sack_chunk_gap_block_start = -1;
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static int hf_sctp_sack_chunk_gap_block_end = -1;
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static int hf_sctp_sack_chunk_duplicate_tsn = -1;
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static int hf_sctp_shutdown_chunk_cumulative_tsn_ack = -1;
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static int hf_sctp_cwr_chunk_lowest_tsn = -1;
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static int hf_sctp_ecne_chunk_lowest_tsn = -1;
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static int hf_sctp_shutdown_complete_chunk_t_bit = -1;
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static int hf_sctp_chunk_parameter_type = -1;
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static int hf_sctp_chunk_parameter_length = -1;
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static int hf_sctp_parameter_ipv4_address = -1;
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static int hf_sctp_parameter_ipv6_address = -1;
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static int hf_sctp_parameter_cookie_preservative_increment = -1;
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static int hf_sctp_parameter_hostname_hostname = -1;
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static int hf_sctp_supported_address_types_parameter = -1;
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static int hf_sctp_cause_code = -1;
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static int hf_sctp_cause_length = -1;
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static int hf_sctp_cause_stream_identifier = -1;
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static int hf_sctp_cause_number_of_missing_parameters = -1;
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static int hf_sctp_cause_missing_parameter_type = -1;
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static int hf_sctp_cause_measure_of_staleness = -1;
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static int hf_sctp_cause_tsn = -1;
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static dissector_table_t sctp_dissector_table;
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/* Initialize the subtree pointers */
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static gint ett_sctp = -1;
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static gint ett_sctp_chunk = -1;
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static gint ett_sctp_chunk_parameter = -1;
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static gint ett_sctp_chunk_cause = -1;
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static gint ett_sctp_data_chunk_flags = -1;
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static gint ett_sctp_sack_chunk_gap_block = -1;
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static gint ett_sctp_supported_address_types_parameter = -1;
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static gint ett_sctp_unrecognized_parameter_parameter = -1;
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#define SCTP_DATA_CHUNK_ID 0
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#define SCTP_INIT_CHUNK_ID 1
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#define SCTP_INIT_ACK_CHUNK_ID 2
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#define SCTP_SACK_CHUNK_ID 3
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#define SCTP_HEARTBEAT_CHUNK_ID 4
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#define SCTP_HEARTBEAT_ACK_CHUNK_ID 5
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#define SCTP_ABORT_CHUNK_ID 6
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#define SCTP_SHUTDOWN_CHUNK_ID 7
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#define SCTP_SHUTDOWN_ACK_CHUNK_ID 8
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#define SCTP_ERROR_CHUNK_ID 9
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#define SCTP_COOKIE_ECHO_CHUNK_ID 10
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#define SCTP_COOKIE_ACK_CHUNK_ID 11
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#define SCTP_ECNE_CHUNK_ID 12
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#define SCTP_CWR_CHUNK_ID 13
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#define SCTP_SHUTDOWN_COMPLETE_CHUNK_ID 14
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#define SCTP_IETF_EXT 255
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static const value_string sctp_chunk_type_values[] = {
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{ SCTP_DATA_CHUNK_ID, "DATA" },
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{ SCTP_INIT_CHUNK_ID, "INIT" },
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{ SCTP_INIT_ACK_CHUNK_ID, "INIT ACK" },
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{ SCTP_SACK_CHUNK_ID, "SACK" },
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{ SCTP_HEARTBEAT_CHUNK_ID, "HEARTBEAT" },
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{ SCTP_HEARTBEAT_ACK_CHUNK_ID, "HEARTBEAT ACK" },
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{ SCTP_ABORT_CHUNK_ID, "ABORT" },
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{ SCTP_SHUTDOWN_CHUNK_ID, "SHUTDOWN" },
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{ SCTP_SHUTDOWN_ACK_CHUNK_ID, "SHUTDOWN ACK" },
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{ SCTP_ERROR_CHUNK_ID, "ERROR" },
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{ SCTP_COOKIE_ECHO_CHUNK_ID, "COOKIE ECHO" },
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{ SCTP_COOKIE_ACK_CHUNK_ID, "COOKIE ACK" },
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{ SCTP_ECNE_CHUNK_ID, "ECNE" },
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{ SCTP_CWR_CHUNK_ID, "CWR" },
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{ SCTP_SHUTDOWN_COMPLETE_CHUNK_ID, "SHUTDOWN COMPLETE" },
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{ SCTP_IETF_EXT, "IETF EXTENSION" },
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{ 0, NULL } };
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#define HEARTBEAT_INFO_PARAMETER_ID 0x0001
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#define IPV4ADDRESS_PARAMETER_ID 0x0005
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#define IPV6ADDRESS_PARAMETER_ID 0x0006
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#define STATE_COOKIE_PARAMETER_ID 0x0007
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#define UNREC_PARA_PARAMETER_ID 0x0008
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#define COOKIE_PRESERVATIVE_PARAMETER_ID 0x0009
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#define HOSTNAME_ADDRESS_PARAMETER_ID 0x000b
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#define SUPPORTED_ADDRESS_TYPES_PARAMETER_ID 0x000c
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#define ECN_PARAMETER_ID 0x8000
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static const value_string sctp_parameter_identifier_values[] = {
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{ HEARTBEAT_INFO_PARAMETER_ID, "Heartbeat info" },
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{ IPV4ADDRESS_PARAMETER_ID, "IPv4 address" },
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{ IPV6ADDRESS_PARAMETER_ID, "IPv6 address" },
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{ STATE_COOKIE_PARAMETER_ID, "State cookie" },
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{ UNREC_PARA_PARAMETER_ID, "Unrecognized parameters" },
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{ COOKIE_PRESERVATIVE_PARAMETER_ID, "Cookie preservative" },
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{ HOSTNAME_ADDRESS_PARAMETER_ID, "Hostname address" },
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{ SUPPORTED_ADDRESS_TYPES_PARAMETER_ID, "Supported address types" },
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{ ECN_PARAMETER_ID, "ECN" },
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{ 0, NULL } };
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#define PARAMETER_TYPE_LENGTH 2
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#define PARAMETER_LENGTH_LENGTH 2
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#define PARAMETER_HEADER_LENGTH (PARAMETER_TYPE_LENGTH + PARAMETER_LENGTH_LENGTH)
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#define PARAMETER_HEADER_OFFSET 0
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#define PARAMETER_TYPE_OFFSET PARAMETER_HEADER_OFFSET
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#define PARAMETER_LENGTH_OFFSET (PARAMETER_TYPE_OFFSET + PARAMETER_TYPE_LENGTH)
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#define PARAMETER_VALUE_OFFSET (PARAMETER_LENGTH_OFFSET + PARAMETER_LENGTH_LENGTH)
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#define HEARTBEAT_INFO_PARAMETER_INFO_OFFSET PARAMETER_VALUE_OFFSET
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#define HEARTBEAT_INFO_PARAMETER_HEADER_LENGTH PARAMETER_HEADER_LENGTH
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#define IPV4_ADDRESS_LENGTH 4
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#define IPV6_ADDRESS_LENGTH 16
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#define STATE_COOKIE_PARAMETER_HEADER_LENGTH PARAMETER_HEADER_LENGTH
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#define STATE_COOKIE_PARAMETER_COOKIE_OFFSET PARAMETER_VALUE_OFFSET
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#define COOKIE_PRESERVATIVE_PARAMETER_INCR_OFFSET PARAMETER_VALUE_OFFSET
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#define COOKIE_PRESERVATIVE_PARAMETER_INCR_LENGTH 4
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#define SUPPORTED_ADDRESS_TYPE_PARAMETER_ADDRESS_TYPE_LENGTH 2
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#define CAUSE_CODE_LENGTH 2
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#define CAUSE_LENGTH_LENGTH 2
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#define CAUSE_HEADER_LENGTH (CAUSE_CODE_LENGTH + CAUSE_LENGTH_LENGTH)
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#define CAUSE_HEADER_OFFSET 0
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#define CAUSE_CODE_OFFSET CAUSE_HEADER_OFFSET
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#define CAUSE_LENGTH_OFFSET (CAUSE_CODE_OFFSET + CAUSE_CODE_LENGTH)
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#define CAUSE_INFO_OFFSET (CAUSE_LENGTH_OFFSET + CAUSE_LENGTH_LENGTH)
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#define CAUSE_STREAM_IDENTIFIER_LENGTH 2
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#define CAUSE_RESERVED_LENGTH 2
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#define CAUSE_STREAM_IDENTIFIER_OFFSET CAUSE_INFO_OFFSET
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#define CAUSE_RESERVED_OFFSET (CAUSE_STREAM_IDENTIFIER_OFFSET + CAUSE_STREAM_IDENTIFIER_LENGTH)
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#define CAUSE_NUMBER_OF_MISSING_PARAMETERS_LENGTH 4
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#define CAUSE_MISSING_PARAMETER_TYPE_LENGTH 2
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#define CAUSE_NUMBER_OF_MISSING_PARAMETERS_OFFSET CAUSE_INFO_OFFSET
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#define CAUSE_FIRST_MISSING_PARAMETER_TYPE_OFFSET (CAUSE_NUMBER_OF_MISSING_PARAMETERS_OFFSET + \
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CAUSE_NUMBER_OF_MISSING_PARAMETERS_LENGTH )
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#define CAUSE_MEASURE_OF_STALENESS_LENGTH 4
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#define CAUSE_MEASURE_OF_STALENESS_OFFSET CAUSE_INFO_OFFSET
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#define CAUSE_TSN_LENGTH 4
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#define CAUSE_TSN_OFFSET CAUSE_INFO_OFFSET
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#define INVALID_STREAM_IDENTIFIER 0x01
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#define MISSING_MANDATORY_PARAMETERS 0x02
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#define STALE_COOKIE_ERROR 0x03
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#define OUT_OF_RESOURCE 0x04
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#define UNRESOLVABLE_ADDRESS 0x05
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#define UNRECOGNIZED_CHUNK_TYPE 0x06
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#define INVALID_MANDATORY_PARAMETER 0x07
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#define UNRECOGNIZED_PARAMETERS 0x08
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#define NO_USER_DATA 0x09
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#define COOKIE_RECEIVED_WHILE_SHUTTING_DOWN 0x0a
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static const value_string sctp_cause_code_values[] = {
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{ INVALID_STREAM_IDENTIFIER, "Invalid stream idetifier" },
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{ MISSING_MANDATORY_PARAMETERS, "Missing mandator parameter" },
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{ STALE_COOKIE_ERROR, "Stale cookie error" },
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{ OUT_OF_RESOURCE, "Out of resource" },
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{ UNRESOLVABLE_ADDRESS, "Unresolvable address" },
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{ UNRECOGNIZED_CHUNK_TYPE, "Unrecognized chunk type " },
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{ INVALID_MANDATORY_PARAMETER, "Invalid mandatory parameter" },
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{ UNRECOGNIZED_PARAMETERS, "Unrecognized parameters" },
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{ NO_USER_DATA, "No user data" },
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{ COOKIE_RECEIVED_WHILE_SHUTTING_DOWN, "Cookie received while shutting down" },
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{ 0, NULL } };
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/* The structure of the common header is described by the following constants */
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#define SOURCE_PORT_LENGTH 2
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#define DESTINATION_PORT_LENGTH 2
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#define VERIFICATION_TAG_LENGTH 4
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#define CHECKSUM_LENGTH 4
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#define COMMON_HEADER_LENGTH (SOURCE_PORT_LENGTH + \
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DESTINATION_PORT_LENGTH + \
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VERIFICATION_TAG_LENGTH + \
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CHECKSUM_LENGTH)
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#define SOURCE_PORT_OFFSET 0
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#define DESTINATION_PORT_OFFSET (SOURCE_PORT_OFFSET + SOURCE_PORT_LENGTH)
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#define VERIFICATION_TAG_OFFSET (DESTINATION_PORT_OFFSET + DESTINATION_PORT_LENGTH)
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#define CHECKSUM_OFFSET (VERIFICATION_TAG_OFFSET + VERIFICATION_TAG_LENGTH)
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/* The structure of the chunk header is described by the following constants */
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#define CHUNK_TYPE_LENGTH 1
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#define CHUNK_FLAGS_LENGTH 1
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#define CHUNK_LENGTH_LENGTH 2
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#define CHUNK_HEADER_LENGTH (CHUNK_TYPE_LENGTH + \
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CHUNK_FLAGS_LENGTH + \
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CHUNK_LENGTH_LENGTH)
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#define CHUNK_HEADER_OFFSET 0
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#define CHUNK_TYPE_OFFSET CHUNK_HEADER_OFFSET
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#define CHUNK_FLAGS_OFFSET (CHUNK_TYPE_OFFSET + CHUNK_TYPE_LENGTH)
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#define CHUNK_LENGTH_OFFSET (CHUNK_FLAGS_OFFSET + CHUNK_FLAGS_LENGTH)
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#define CHUNK_VALUE_OFFSET (CHUNK_LENGTH_OFFSET + CHUNK_LENGTH_LENGTH)
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/* The following constants describe the structure of DATA chunks */
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#define DATA_CHUNK_TSN_LENGTH 4
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#define DATA_CHUNK_STREAM_ID_LENGTH 2
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#define DATA_CHUNK_STREAM_SEQ_NUMBER_LENGTH 2
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#define DATA_CHUNK_PAYLOAD_PROTOCOL_ID_LENGTH 4
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#define DATA_CHUNK_TSN_OFFSET (CHUNK_VALUE_OFFSET + 0)
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#define DATA_CHUNK_STREAM_ID_OFFSET (DATA_CHUNK_TSN_OFFSET + DATA_CHUNK_TSN_LENGTH)
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#define DATA_CHUNK_STREAM_SEQ_NUMBER_OFFSET (DATA_CHUNK_STREAM_ID_OFFSET + \
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DATA_CHUNK_STREAM_SEQ_NUMBER_LENGTH)
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#define DATA_CHUNK_PAYLOAD_PROTOCOL_ID_OFFSET (DATA_CHUNK_STREAM_SEQ_NUMBER_OFFSET + \
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DATA_CHUNK_STREAM_SEQ_NUMBER_LENGTH)
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#define DATA_CHUNK_PAYLOAD_OFFSET (DATA_CHUNK_PAYLOAD_PROTOCOL_ID_OFFSET + \
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DATA_CHUNK_PAYLOAD_PROTOCOL_ID_LENGTH)
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#define DATA_CHUNK_HEADER_LENGTH (CHUNK_HEADER_LENGTH + \
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DATA_CHUNK_TSN_LENGTH + \
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DATA_CHUNK_STREAM_ID_LENGTH + \
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DATA_CHUNK_STREAM_SEQ_NUMBER_LENGTH + \
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DATA_CHUNK_PAYLOAD_PROTOCOL_ID_LENGTH)
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#define SCTP_DATA_CHUNK_E_BIT 0x01
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#define SCTP_DATA_CHUNK_B_BIT 0x02
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#define SCTP_DATA_CHUNK_U_BIT 0x04
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#define INIT_CHUNK_INITIATE_TAG_LENGTH 4
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#define INIT_CHUNK_ADV_REC_WINDOW_CREDIT_LENGTH 4
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#define INIT_CHUNK_NUMBER_OF_OUTBOUND_STREAMS_LENGTH 2
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#define INIT_CHUNK_NUMBER_OF_INBOUND_STREAMS_LENGTH 2
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#define INIT_CHUNK_INITIAL_TSN_LENGTH 4
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#define INIT_CHUNK_INITIATE_TAG_OFFSET CHUNK_VALUE_OFFSET
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#define INIT_CHUNK_ADV_REC_WINDOW_CREDIT_OFFSET (INIT_CHUNK_INITIATE_TAG_OFFSET + \
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INIT_CHUNK_INITIATE_TAG_LENGTH )
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#define INIT_CHUNK_NUMBER_OF_OUTBOUND_STREAMS_OFFSET (INIT_CHUNK_ADV_REC_WINDOW_CREDIT_OFFSET + \
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INIT_CHUNK_ADV_REC_WINDOW_CREDIT_LENGTH )
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#define INIT_CHUNK_NUMBER_OF_INBOUND_STREAMS_OFFSET (INIT_CHUNK_NUMBER_OF_OUTBOUND_STREAMS_OFFSET + \
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INIT_CHUNK_NUMBER_OF_OUTBOUND_STREAMS_LENGTH )
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#define INIT_CHUNK_INITIAL_TSN_OFFSET (INIT_CHUNK_NUMBER_OF_INBOUND_STREAMS_OFFSET + \
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INIT_CHUNK_NUMBER_OF_INBOUND_STREAMS_LENGTH )
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#define INIT_CHUNK_VARIABLE_LENGTH_PARAMETER_OFFSET (INIT_CHUNK_INITIAL_TSN_OFFSET + \
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INIT_CHUNK_INITIAL_TSN_LENGTH )
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#define SACK_CHUNK_CUMULATIVE_TSN_ACK_LENGTH 4
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#define SACK_CHUNK_ADV_REC_WINDOW_CREDIT_LENGTH 4
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#define SACK_CHUNK_NUMBER_OF_GAP_BLOCKS_LENGTH 2
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#define SACK_CHUNK_NUMBER_OF_DUP_TSNS_LENGTH 2
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#define SACK_CHUNK_GAP_BLOCK_LENGTH 4
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#define SACK_CHUNK_GAP_BLOCK_START_LENGTH 2
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#define SACK_CHUNK_GAP_BLOCK_END_LENGTH 2
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#define SACK_CHUNK_DUP_TSN_LENGTH 4
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#define SACK_CHUNK_CUMULATIVE_TSN_ACK_OFFSET (CHUNK_VALUE_OFFSET + 0)
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#define SACK_CHUNK_ADV_REC_WINDOW_CREDIT_OFFSET (SACK_CHUNK_CUMULATIVE_TSN_ACK_OFFSET + \
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SACK_CHUNK_CUMULATIVE_TSN_ACK_LENGTH)
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#define SACK_CHUNK_NUMBER_OF_GAP_BLOCKS_OFFSET (SACK_CHUNK_ADV_REC_WINDOW_CREDIT_OFFSET + \
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SACK_CHUNK_ADV_REC_WINDOW_CREDIT_LENGTH)
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#define SACK_CHUNK_NUMBER_OF_DUP_TSNS_OFFSET (SACK_CHUNK_NUMBER_OF_GAP_BLOCKS_OFFSET + \
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SACK_CHUNK_NUMBER_OF_GAP_BLOCKS_LENGTH)
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#define SACK_CHUNK_GAP_BLOCK_OFFSET (SACK_CHUNK_NUMBER_OF_DUP_TSNS_OFFSET + \
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SACK_CHUNK_NUMBER_OF_DUP_TSNS_LENGTH)
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#define HEARTBEAT_CHUNK_INFO_OFFSET CHUNK_VALUE_OFFSET
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#define SHUTDOWN_CHUNK_CUMULATIVE_TSN_ACK_OFFSET CHUNK_VALUE_OFFSET
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#define SHUTDOWN_CHUNK_CUMULATIVE_TSN_ACK_LENGTH 4
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#define ABORT_CHUNK_FIRST_ERROR_CAUSE_OFFSET 4
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#define ERROR_CHUNK_FIRST_ERROR_CAUSE_OFFSET 4
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#define COOKIE_ECHO_CHUNK_COOKIE_OFFSET CHUNK_VALUE_OFFSET
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#define ECNE_CHUNK_LOWEST_TSN_OFFSET CHUNK_VALUE_OFFSET
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#define ECNE_CHUNK_LOWEST_TSN_LENGTH 4
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|
|
#define CWR_CHUNK_LOWEST_TSN_OFFSET CHUNK_VALUE_OFFSET
|
|
#define CWR_CHUNK_LOWEST_TSN_LENGTH 4
|
|
|
|
#define SCTP_SHUTDOWN_COMPLETE_CHUNK_T_BIT 0x01
|
|
|
|
static const true_false_string sctp_data_chunk_e_bit_value = {
|
|
"Last segment",
|
|
"Not the last segment"
|
|
};
|
|
|
|
static const true_false_string sctp_data_chunk_b_bit_value = {
|
|
"First segment",
|
|
"Subsequent segment"
|
|
};
|
|
|
|
static const true_false_string sctp_data_chunk_u_bit_value = {
|
|
"Unordered delivery",
|
|
"Ordered deliviery"
|
|
};
|
|
|
|
static const true_false_string sctp_shutdown_complete_chunk_t_bit_value = {
|
|
"No TCB destroyed",
|
|
"TCB destroyed"
|
|
};
|
|
|
|
/* adler32.c -- compute the Adler-32 checksum of a data stream
|
|
* Copyright (C) 1995-1996 Mark Adler
|
|
* For conditions of distribution and use, see copyright notice in zlib.h
|
|
* available, e.g. from http://www.cdrom.com/pub/infozip/zlib/
|
|
*
|
|
* It was modified for the use in this dissector.
|
|
*/
|
|
|
|
#define BASE 65521L /* largest prime smaller than 65536 */
|
|
#define NMAX 5540 /* NMAX is the largest n - 12 such that */
|
|
/* 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1 */
|
|
|
|
#define DO1(buf,i) {s1 += buf[i]; s2 += s1;}
|
|
#define DO2(buf,i) DO1(buf,i); DO1(buf,i+1);
|
|
#define DO4(buf,i) DO2(buf,i); DO2(buf,i+2);
|
|
#define DO8(buf,i) DO4(buf,i); DO4(buf,i+4);
|
|
#define DO16(buf) DO8(buf,0); DO8(buf,8);
|
|
|
|
unsigned int sctp_adler_32(const unsigned char* buf,
|
|
unsigned int len)
|
|
{
|
|
unsigned int s1 = 1L;
|
|
unsigned int s2 = 0L;
|
|
int k;
|
|
|
|
/* handle the first 8 bytes of the datagram */
|
|
DO8(buf,0);
|
|
buf += SOURCE_PORT_LENGTH +
|
|
DESTINATION_PORT_LENGTH +
|
|
VERIFICATION_TAG_LENGTH;
|
|
|
|
/* handle four 0 bytes as checksum */
|
|
s2 += CHECKSUM_LENGTH * s1;
|
|
buf += CHECKSUM_LENGTH;
|
|
|
|
/* now we have 12 bytes handled */
|
|
len -= COMMON_HEADER_LENGTH;
|
|
|
|
/* handle the rest of the datagram */
|
|
while (len > 0) {
|
|
k = len < NMAX ? len : NMAX;
|
|
len -= k;
|
|
while (k >= 16) {
|
|
DO16(buf);
|
|
buf += 16;
|
|
k -= 16;
|
|
}
|
|
if (k != 0) do {
|
|
s1 += *buf++;
|
|
s2 += s1;
|
|
} while (--k);
|
|
s1 %= BASE;
|
|
s2 %= BASE;
|
|
}
|
|
return (s2 << 16) | s1;
|
|
}
|
|
|
|
static char *sctp_checksum_state(tvbuff_t *tvb, guint orig_checksum)
|
|
{
|
|
guint length;
|
|
|
|
length = tvb_length(tvb);
|
|
if (orig_checksum == sctp_adler_32(tvb_get_ptr(tvb, 0, length), length))
|
|
return "correct";
|
|
else
|
|
return "incorrect";
|
|
}
|
|
|
|
guint
|
|
nr_of_padding_bytes (guint length)
|
|
{
|
|
guint remainder;
|
|
|
|
remainder = length % 4;
|
|
|
|
if (remainder == 0)
|
|
return 0;
|
|
else
|
|
return 4 - remainder;
|
|
}
|
|
|
|
/*
|
|
* TLV parameter stuff for INIT and INIT-ACK chunks
|
|
*/
|
|
|
|
void
|
|
dissect_parameter(tvbuff_t *, proto_tree *);
|
|
|
|
void
|
|
dissect_sctp_chunk(tvbuff_t *, packet_info *, proto_tree *, proto_tree *);
|
|
|
|
void dissect_tlv_parameter_list(tvbuff_t *parameter_list_tvb, proto_tree *tree)
|
|
{
|
|
guint offset, length, padding_length, total_length;
|
|
tvbuff_t *parameter_tvb;
|
|
|
|
offset = 0;
|
|
while(tvb_length_remaining(parameter_list_tvb, offset)) {
|
|
length = tvb_get_ntohs(parameter_list_tvb, offset + PARAMETER_LENGTH_OFFSET);
|
|
padding_length = nr_of_padding_bytes(length);
|
|
total_length = length + padding_length;
|
|
/* create a tvb for the chunk including the padding bytes */
|
|
parameter_tvb = tvb_new_subset(parameter_list_tvb, offset, total_length, total_length);
|
|
dissect_parameter(parameter_tvb, tree);
|
|
/* get rid of the handled parameter */
|
|
offset += total_length;
|
|
}
|
|
}
|
|
|
|
void
|
|
dissect_heartbeat_info_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
|
|
{
|
|
guint16 length, heartbeat_info_length;
|
|
|
|
length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
|
|
|
|
heartbeat_info_length = length - HEARTBEAT_INFO_PARAMETER_HEADER_LENGTH;
|
|
|
|
proto_tree_add_text(parameter_tree, parameter_tvb, HEARTBEAT_INFO_PARAMETER_INFO_OFFSET, heartbeat_info_length,
|
|
"Heartbeat info (%u byte%s)",
|
|
heartbeat_info_length, plurality(heartbeat_info_length, "", "s"));
|
|
|
|
proto_item_set_text(parameter_item, "Heartbeat info parameter with %u byte%s of info",
|
|
heartbeat_info_length, plurality(heartbeat_info_length, "", "s"));
|
|
}
|
|
|
|
void
|
|
dissect_ipv4_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
|
|
{
|
|
guint32 ipv4_address;
|
|
|
|
tvb_memcpy(parameter_tvb, (guint8 *)&ipv4_address, PARAMETER_VALUE_OFFSET, IPV4_ADDRESS_LENGTH);
|
|
proto_tree_add_ipv4(parameter_tree, hf_sctp_parameter_ipv4_address,
|
|
parameter_tvb, PARAMETER_VALUE_OFFSET, IPV4_ADDRESS_LENGTH,
|
|
ipv4_address);
|
|
proto_item_set_text(parameter_item, "IPV4 address parameter");
|
|
}
|
|
|
|
void
|
|
dissect_ipv6_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
|
|
{
|
|
proto_tree_add_ipv6(parameter_tree, hf_sctp_parameter_ipv6_address,
|
|
parameter_tvb, PARAMETER_VALUE_OFFSET, IPV6_ADDRESS_LENGTH,
|
|
tvb_get_ptr(parameter_tvb, PARAMETER_VALUE_OFFSET, IPV6_ADDRESS_LENGTH));
|
|
|
|
proto_item_set_text(parameter_item, "IPV6 address parameter");
|
|
}
|
|
|
|
void
|
|
dissect_state_cookie_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
|
|
{
|
|
guint16 length, state_cookie_length;
|
|
|
|
length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
|
|
|
|
state_cookie_length = length - STATE_COOKIE_PARAMETER_HEADER_LENGTH;
|
|
|
|
proto_tree_add_text(parameter_tree, parameter_tvb, STATE_COOKIE_PARAMETER_COOKIE_OFFSET, state_cookie_length,
|
|
"State cookie (%u byte%s)",
|
|
state_cookie_length, plurality(state_cookie_length, "", "s"));
|
|
|
|
proto_item_set_text(parameter_item, "State Cookie Parameter with %u byte%s cookie",
|
|
state_cookie_length, plurality(state_cookie_length, "", "s"));
|
|
}
|
|
|
|
void
|
|
dissect_unrecognized_parameters_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
|
|
{
|
|
guint16 length, parameter_value_length;
|
|
tvbuff_t *unrecognized_parameters_tvb;
|
|
|
|
length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
|
|
|
|
parameter_value_length = length - PARAMETER_HEADER_LENGTH;
|
|
|
|
unrecognized_parameters_tvb = tvb_new_subset(parameter_tvb, PARAMETER_VALUE_OFFSET,
|
|
parameter_value_length, parameter_value_length);
|
|
dissect_tlv_parameter_list(unrecognized_parameters_tvb, parameter_tree);
|
|
|
|
proto_item_set_text(parameter_item, "Unrecognized parameter of type");
|
|
}
|
|
|
|
void
|
|
dissect_cookie_preservative_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
|
|
{
|
|
guint32 increment;
|
|
|
|
increment = tvb_get_ntohl(parameter_tvb, COOKIE_PRESERVATIVE_PARAMETER_INCR_OFFSET);
|
|
|
|
proto_tree_add_uint(parameter_tree, hf_sctp_parameter_cookie_preservative_increment, parameter_tvb,
|
|
COOKIE_PRESERVATIVE_PARAMETER_INCR_OFFSET,
|
|
COOKIE_PRESERVATIVE_PARAMETER_INCR_LENGTH,
|
|
increment);
|
|
|
|
proto_item_set_text(parameter_item, "Cookie preservative parameter requesting for a %u msec increment",
|
|
increment);
|
|
}
|
|
|
|
void
|
|
dissect_hostname_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
|
|
{
|
|
guint16 length, hostname_length;
|
|
char *hostname;
|
|
|
|
length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
|
|
|
|
hostname_length = length - PARAMETER_HEADER_LENGTH;
|
|
hostname = (char *)tvb_get_ptr(parameter_tvb, PARAMETER_VALUE_OFFSET, hostname_length);
|
|
proto_tree_add_string(parameter_tree, hf_sctp_parameter_hostname_hostname, parameter_tvb,
|
|
PARAMETER_VALUE_OFFSET, hostname_length,
|
|
hostname);
|
|
|
|
proto_item_set_text(parameter_item, "Hostname parameter");
|
|
}
|
|
|
|
void
|
|
dissect_supported_address_types_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
|
|
{
|
|
guint16 length, address_type, number_of_address_types, address_type_number, list_of_address_types_length ;
|
|
guint offset;
|
|
proto_item *address_list_item;
|
|
proto_tree *address_list_tree;
|
|
|
|
length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
|
|
list_of_address_types_length = length - PARAMETER_HEADER_LENGTH;
|
|
number_of_address_types = list_of_address_types_length / SUPPORTED_ADDRESS_TYPE_PARAMETER_ADDRESS_TYPE_LENGTH;
|
|
|
|
address_list_item = proto_tree_add_text(parameter_tree, parameter_tvb, PARAMETER_VALUE_OFFSET, list_of_address_types_length,
|
|
"Supported Address Types (%u address type%s)",
|
|
number_of_address_types, plurality(number_of_address_types, "", "s"));
|
|
address_list_tree = proto_item_add_subtree(address_list_item, ett_sctp_supported_address_types_parameter);
|
|
|
|
offset = PARAMETER_VALUE_OFFSET;
|
|
for(address_type_number = 1; address_type_number <= number_of_address_types; address_type_number++) {
|
|
address_type = tvb_get_ntohs(parameter_tvb, offset);
|
|
proto_tree_add_uint_format(address_list_tree, hf_sctp_supported_address_types_parameter,
|
|
parameter_tvb, offset, SUPPORTED_ADDRESS_TYPE_PARAMETER_ADDRESS_TYPE_LENGTH,
|
|
address_type, "Supported address type: %u (%s)",
|
|
address_type, val_to_str(address_type, sctp_parameter_identifier_values, "unknown"));
|
|
offset += SUPPORTED_ADDRESS_TYPE_PARAMETER_ADDRESS_TYPE_LENGTH;
|
|
};
|
|
|
|
proto_item_set_text(parameter_item, "Supported address types parameter reporting %u address type%s",
|
|
number_of_address_types, plurality(number_of_address_types, "", "s"));
|
|
}
|
|
|
|
void
|
|
dissect_ecn_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
|
|
{
|
|
proto_item_set_text(parameter_item, "ECN parameter");
|
|
}
|
|
|
|
void
|
|
dissect_unknown_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
|
|
{
|
|
guint16 type, length, parameter_value_length;
|
|
|
|
type = tvb_get_ntohs(parameter_tvb, PARAMETER_TYPE_OFFSET);
|
|
length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
|
|
|
|
parameter_value_length = length - PARAMETER_HEADER_LENGTH;
|
|
|
|
proto_tree_add_text(parameter_tree, parameter_tvb, PARAMETER_VALUE_OFFSET, parameter_value_length,
|
|
"Parameter value (%u byte%s)",
|
|
parameter_value_length, plurality(parameter_value_length, "", "s"));
|
|
|
|
proto_item_set_text(parameter_item, "Parameter of type %u and %u byte%s value",
|
|
type, parameter_value_length, plurality(parameter_value_length, "", "s"));
|
|
}
|
|
|
|
void
|
|
dissect_parameter(tvbuff_t *parameter_tvb, proto_tree *chunk_tree)
|
|
{
|
|
guint16 type, length, padding_length, total_length;
|
|
proto_item *parameter_item;
|
|
proto_tree *parameter_tree;
|
|
|
|
type = tvb_get_ntohs(parameter_tvb, PARAMETER_TYPE_OFFSET);
|
|
length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
|
|
padding_length = nr_of_padding_bytes(length);
|
|
total_length = length + padding_length;
|
|
|
|
parameter_item = proto_tree_add_notext(chunk_tree, parameter_tvb, PARAMETER_HEADER_OFFSET, total_length);
|
|
parameter_tree = proto_item_add_subtree(parameter_item, ett_sctp_chunk_parameter);
|
|
|
|
proto_tree_add_uint_format(parameter_tree, hf_sctp_chunk_parameter_type,
|
|
parameter_tvb, PARAMETER_TYPE_OFFSET, PARAMETER_TYPE_LENGTH,
|
|
type, "Parameter type: %u (%s)",
|
|
type, val_to_str(type, sctp_parameter_identifier_values, "unknown"));
|
|
proto_tree_add_uint(parameter_tree, hf_sctp_chunk_parameter_length,
|
|
parameter_tvb, PARAMETER_LENGTH_OFFSET, PARAMETER_LENGTH_LENGTH,
|
|
length);
|
|
|
|
switch(type) {
|
|
case HEARTBEAT_INFO_PARAMETER_ID:
|
|
dissect_heartbeat_info_parameter(parameter_tvb, parameter_tree, parameter_item);
|
|
break;
|
|
case IPV4ADDRESS_PARAMETER_ID:
|
|
dissect_ipv4_parameter(parameter_tvb, parameter_tree, parameter_item);
|
|
break;
|
|
case IPV6ADDRESS_PARAMETER_ID:
|
|
dissect_ipv6_parameter(parameter_tvb, parameter_tree, parameter_item);
|
|
break;
|
|
case STATE_COOKIE_PARAMETER_ID:
|
|
dissect_state_cookie_parameter(parameter_tvb, parameter_tree, parameter_item);
|
|
break;
|
|
case UNREC_PARA_PARAMETER_ID:
|
|
dissect_unrecognized_parameters_parameter(parameter_tvb, parameter_tree, parameter_item);
|
|
break;
|
|
case COOKIE_PRESERVATIVE_PARAMETER_ID:
|
|
dissect_cookie_preservative_parameter(parameter_tvb, parameter_tree, parameter_item);
|
|
break;
|
|
case HOSTNAME_ADDRESS_PARAMETER_ID:
|
|
dissect_hostname_parameter(parameter_tvb, parameter_tree, parameter_item);
|
|
break;
|
|
case SUPPORTED_ADDRESS_TYPES_PARAMETER_ID:
|
|
dissect_supported_address_types_parameter(parameter_tvb, parameter_tree, parameter_item);
|
|
break;
|
|
case ECN_PARAMETER_ID:
|
|
dissect_ecn_parameter(parameter_tvb, parameter_tree, parameter_item);
|
|
break;
|
|
default:
|
|
dissect_unknown_parameter(parameter_tvb, parameter_tree, parameter_item);
|
|
break;
|
|
};
|
|
if (padding_length > 0)
|
|
proto_tree_add_text(parameter_tree, parameter_tvb, PARAMETER_HEADER_OFFSET + length, padding_length,
|
|
"Padding: %u byte%s",
|
|
padding_length, plurality(padding_length, "", "s"));
|
|
}
|
|
|
|
/*
|
|
* Code to handle error causes for ABORT and ERROR chunks
|
|
*/
|
|
void
|
|
dissect_invalid_stream_identifier_cause(tvbuff_t *cause_tvb, proto_tree *cause_tree, proto_item *cause_item)
|
|
{
|
|
guint16 stream_identifier;
|
|
|
|
stream_identifier = tvb_get_ntohs(cause_tvb, CAUSE_STREAM_IDENTIFIER_OFFSET);
|
|
proto_tree_add_uint(cause_tree, hf_sctp_cause_stream_identifier,
|
|
cause_tvb, CAUSE_STREAM_IDENTIFIER_OFFSET, CAUSE_STREAM_IDENTIFIER_LENGTH,
|
|
stream_identifier);
|
|
proto_tree_add_text(cause_tree, cause_tvb, CAUSE_RESERVED_OFFSET, CAUSE_RESERVED_LENGTH,
|
|
"Reserved (2 bytes)");
|
|
|
|
proto_item_set_text(cause_item, "Error cause reporting invalid stream identifier %u",
|
|
stream_identifier);
|
|
}
|
|
|
|
void
|
|
dissect_missing_mandatory_parameters_cause(tvbuff_t *cause_tvb, proto_tree *cause_tree, proto_item *cause_item)
|
|
{
|
|
guint32 number_of_missing_parameters, missing_parameter_number;
|
|
guint16 parameter_type;
|
|
guint offset;
|
|
|
|
number_of_missing_parameters = tvb_get_ntohl(cause_tvb, CAUSE_NUMBER_OF_MISSING_PARAMETERS_OFFSET);
|
|
proto_tree_add_uint(cause_tree, hf_sctp_cause_number_of_missing_parameters,
|
|
cause_tvb, CAUSE_NUMBER_OF_MISSING_PARAMETERS_OFFSET, CAUSE_NUMBER_OF_MISSING_PARAMETERS_LENGTH,
|
|
number_of_missing_parameters);
|
|
offset = CAUSE_FIRST_MISSING_PARAMETER_TYPE_OFFSET;
|
|
for(missing_parameter_number = 1; missing_parameter_number <= number_of_missing_parameters; missing_parameter_number++) {
|
|
parameter_type = tvb_get_ntohs(cause_tvb, offset);
|
|
proto_tree_add_uint_format(cause_tree, hf_sctp_cause_missing_parameter_type,
|
|
cause_tvb, offset, CAUSE_MISSING_PARAMETER_TYPE_LENGTH,
|
|
parameter_type, "Missing parameter type: %u (%s)",
|
|
parameter_type,
|
|
val_to_str(parameter_type, sctp_parameter_identifier_values, "unknown"));
|
|
offset += CAUSE_MISSING_PARAMETER_TYPE_LENGTH;
|
|
};
|
|
|
|
proto_item_set_text(cause_item, "Error cause reporting %u missing mandatory parameter%s",
|
|
number_of_missing_parameters, plurality(number_of_missing_parameters, "", "s") );
|
|
}
|
|
|
|
void
|
|
dissect_stale_cookie_error_cause(tvbuff_t *cause_tvb, proto_tree *cause_tree, proto_item *cause_item)
|
|
{
|
|
guint32 measure_of_staleness;
|
|
|
|
measure_of_staleness = tvb_get_ntohl(cause_tvb, CAUSE_MEASURE_OF_STALENESS_OFFSET);
|
|
|
|
proto_tree_add_uint(cause_tree, hf_sctp_cause_measure_of_staleness, cause_tvb,
|
|
CAUSE_MEASURE_OF_STALENESS_OFFSET,
|
|
CAUSE_MEASURE_OF_STALENESS_LENGTH,
|
|
measure_of_staleness);
|
|
|
|
proto_item_set_text(cause_item, "Error cause reporting a measure of staleness of %u usec",
|
|
measure_of_staleness);
|
|
}
|
|
|
|
void
|
|
dissect_out_of_resource_cause(tvbuff_t *cause_tvb, proto_tree *cause_tree, proto_item *cause_item)
|
|
{
|
|
proto_item_set_text(cause_item, "Error cause reporting lack of resources");
|
|
}
|
|
|
|
void
|
|
dissect_unresolvable_address_cause(tvbuff_t *cause_tvb, proto_tree *cause_tree, proto_item *cause_item)
|
|
{
|
|
guint16 code, length, parameter_length, parameter_type;
|
|
tvbuff_t *parameter_tvb;
|
|
|
|
code = tvb_get_ntohs(cause_tvb, CAUSE_CODE_OFFSET);
|
|
length = tvb_get_ntohs(cause_tvb, CAUSE_LENGTH_OFFSET);
|
|
|
|
parameter_length = length - CAUSE_HEADER_LENGTH;
|
|
parameter_tvb = tvb_new_subset(cause_tvb, CAUSE_INFO_OFFSET,
|
|
parameter_length, parameter_length);
|
|
|
|
dissect_parameter(parameter_tvb, cause_tree);
|
|
parameter_type = tvb_get_ntohs(parameter_tvb, PARAMETER_TYPE_OFFSET);
|
|
|
|
proto_item_set_text(cause_item, "Error cause reporting unresolvable address of type %u (%s)",
|
|
parameter_type, val_to_str(parameter_type, sctp_parameter_identifier_values, "unknown") );
|
|
}
|
|
|
|
void
|
|
dissect_unrecognized_chunk_type_cause(tvbuff_t *cause_tvb, packet_info *pinfo,
|
|
proto_tree *cause_tree, proto_item *cause_item)
|
|
{
|
|
guint16 length, chunk_length;
|
|
guint8 unrecognized_type;
|
|
tvbuff_t *unrecognized_chunk_tvb;
|
|
|
|
length = tvb_get_ntohs(cause_tvb, CAUSE_LENGTH_OFFSET);
|
|
|
|
chunk_length = length - CAUSE_HEADER_LENGTH;
|
|
|
|
unrecognized_chunk_tvb = tvb_new_subset(cause_tvb, CAUSE_INFO_OFFSET,
|
|
chunk_length, chunk_length);
|
|
dissect_sctp_chunk(unrecognized_chunk_tvb, pinfo, cause_tree,cause_tree);
|
|
|
|
unrecognized_type = tvb_get_guint8(unrecognized_chunk_tvb, CHUNK_TYPE_OFFSET);
|
|
|
|
proto_item_set_text(cause_item, "Error cause reporting unrecognized chunk of type %u (%s)",
|
|
unrecognized_type,
|
|
val_to_str(unrecognized_type, sctp_chunk_type_values, "unknown"));
|
|
}
|
|
|
|
void
|
|
dissect_invalid_mandatory_parameter_cause(tvbuff_t *cause_tvb, proto_tree *cause_tree, proto_item *cause_item)
|
|
{
|
|
proto_item_set_text(cause_item, "Error cause reporting an invalid mandatory parameter");
|
|
}
|
|
|
|
void
|
|
dissect_unrecognized_parameters_cause(tvbuff_t *cause_tvb, proto_tree *cause_tree, proto_item *cause_item)
|
|
{
|
|
guint16 length, cause_info_length;
|
|
tvbuff_t *unrecognized_parameters_tvb;
|
|
|
|
length = tvb_get_ntohs(cause_tvb, CAUSE_LENGTH_OFFSET);
|
|
|
|
cause_info_length = length - CAUSE_HEADER_LENGTH;
|
|
|
|
unrecognized_parameters_tvb = tvb_new_subset(cause_tvb, CAUSE_INFO_OFFSET,
|
|
cause_info_length, cause_info_length);
|
|
dissect_tlv_parameter_list(unrecognized_parameters_tvb, cause_tree);
|
|
|
|
proto_item_set_text(cause_item, "Error cause reporting unrecognized parameters");
|
|
}
|
|
|
|
void
|
|
dissect_no_user_data_cause(tvbuff_t *cause_tvb, proto_tree *cause_tree, proto_item *cause_item)
|
|
{
|
|
guint32 tsn;
|
|
|
|
tsn = tvb_get_ntohl(cause_tvb, CAUSE_TSN_OFFSET);
|
|
proto_tree_add_uint(cause_tree, hf_sctp_cause_tsn, cause_tvb,
|
|
CAUSE_TSN_OFFSET,
|
|
CAUSE_TSN_LENGTH,
|
|
tsn);
|
|
|
|
proto_item_set_text(cause_item, "Error cause reporting data chunk with TSN %u contains no data",
|
|
tsn);
|
|
}
|
|
|
|
void
|
|
dissect_cookie_received_while_shutting_down_cause(tvbuff_t *cause_tvb, proto_tree *cause_tree, proto_item *cause_item)
|
|
{
|
|
proto_item_set_text(cause_item, "Error cause reporting cookie reception while shutting down");
|
|
}
|
|
|
|
void
|
|
dissect_unknown_cause(tvbuff_t *cause_tvb, proto_tree *cause_tree, proto_item *cause_item)
|
|
{
|
|
guint16 code, length, cause_info_length;
|
|
|
|
code = tvb_get_ntohs(cause_tvb, CAUSE_CODE_OFFSET);
|
|
length = tvb_get_ntohs(cause_tvb, CAUSE_LENGTH_OFFSET);
|
|
|
|
cause_info_length = length - CAUSE_HEADER_LENGTH;
|
|
|
|
proto_tree_add_text(cause_tree, cause_tvb, CAUSE_INFO_OFFSET, cause_info_length,
|
|
"Cause specific information (%u byte%s)",
|
|
cause_info_length, plurality(cause_info_length, "", "s"));
|
|
|
|
proto_item_set_text(cause_item, "Error cause with code %u and %u byte%s information",
|
|
code, cause_info_length, plurality(cause_info_length, "", "s"));
|
|
}
|
|
|
|
void
|
|
dissect_error_cause(tvbuff_t *cause_tvb, packet_info *pinfo, proto_tree *chunk_tree)
|
|
{
|
|
guint16 code, length, padding_length, total_length;
|
|
proto_item *cause_item;
|
|
proto_tree *cause_tree;
|
|
|
|
code = tvb_get_ntohs(cause_tvb, CAUSE_CODE_OFFSET);
|
|
length = tvb_get_ntohs(cause_tvb, CAUSE_LENGTH_OFFSET);
|
|
padding_length = nr_of_padding_bytes(length);
|
|
total_length = length + padding_length;
|
|
|
|
cause_item = proto_tree_add_notext(chunk_tree, cause_tvb, CAUSE_HEADER_OFFSET, total_length);
|
|
proto_item_set_text(cause_item, "BAD ERROR CAUSE");
|
|
cause_tree = proto_item_add_subtree(cause_item, ett_sctp_chunk_cause);
|
|
|
|
proto_tree_add_uint_format(cause_tree, hf_sctp_cause_code,
|
|
cause_tvb, CAUSE_CODE_OFFSET, CAUSE_CODE_LENGTH,
|
|
code, "Cause code: %u (%s)",
|
|
code, val_to_str(code, sctp_cause_code_values, "unknown"));
|
|
proto_tree_add_uint(cause_tree, hf_sctp_cause_length,
|
|
cause_tvb, CAUSE_LENGTH_OFFSET, CAUSE_LENGTH_LENGTH,
|
|
length);
|
|
|
|
switch(code) {
|
|
case INVALID_STREAM_IDENTIFIER:
|
|
dissect_invalid_stream_identifier_cause(cause_tvb, cause_tree, cause_item);
|
|
break;
|
|
case MISSING_MANDATORY_PARAMETERS:
|
|
dissect_missing_mandatory_parameters_cause(cause_tvb, cause_tree, cause_item);
|
|
break;
|
|
case STALE_COOKIE_ERROR:
|
|
dissect_stale_cookie_error_cause(cause_tvb, cause_tree, cause_item);
|
|
break;
|
|
case OUT_OF_RESOURCE:
|
|
dissect_out_of_resource_cause(cause_tvb, cause_tree, cause_item);
|
|
break;
|
|
case UNRESOLVABLE_ADDRESS:
|
|
dissect_unresolvable_address_cause(cause_tvb, cause_tree, cause_item);
|
|
break;
|
|
case UNRECOGNIZED_CHUNK_TYPE:
|
|
dissect_unrecognized_chunk_type_cause(cause_tvb, pinfo, cause_tree, cause_item);
|
|
break;
|
|
case INVALID_MANDATORY_PARAMETER:
|
|
dissect_invalid_mandatory_parameter_cause(cause_tvb, cause_tree, cause_item);
|
|
break;
|
|
case UNRECOGNIZED_PARAMETERS:
|
|
dissect_unrecognized_parameters_cause(cause_tvb, cause_tree, cause_item);
|
|
break;
|
|
case NO_USER_DATA:
|
|
dissect_no_user_data_cause(cause_tvb, cause_tree, cause_item);
|
|
break;
|
|
case COOKIE_RECEIVED_WHILE_SHUTTING_DOWN:
|
|
dissect_cookie_received_while_shutting_down_cause(cause_tvb, cause_tree, cause_item);
|
|
break;
|
|
default:
|
|
dissect_unknown_cause(cause_tvb, cause_tree, cause_item);
|
|
break;
|
|
};
|
|
if (padding_length > 0)
|
|
proto_tree_add_text(cause_tree, cause_tvb, CAUSE_HEADER_OFFSET + length, padding_length,
|
|
"Padding: %u byte%s",
|
|
padding_length, plurality(padding_length, "", "s"));
|
|
}
|
|
|
|
/*
|
|
* Code to actually dissect the packets
|
|
*/
|
|
|
|
static void
|
|
dissect_payload(tvbuff_t *payload_tvb, packet_info *pinfo, proto_tree *tree,
|
|
proto_tree *chunk_tree, guint16 payload_length, guint16 padding_length)
|
|
{
|
|
/* do lookup with the subdissector table */
|
|
if (dissector_try_port(sctp_dissector_table, pi.srcport, payload_tvb, pinfo, tree) ||
|
|
dissector_try_port(sctp_dissector_table, pi.destport, payload_tvb, pinfo, tree))
|
|
return;
|
|
else {
|
|
proto_tree_add_text(chunk_tree, payload_tvb, 0, payload_length,
|
|
"Payload (%u byte%s)",
|
|
payload_length, plurality(payload_length, "", "s"));
|
|
if (padding_length > 0)
|
|
proto_tree_add_text(chunk_tree, payload_tvb, payload_length, padding_length,
|
|
"Padding: %u byte%s",
|
|
padding_length, plurality(padding_length, "", "s"));
|
|
}
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
static void
|
|
dissect_data_chunk(tvbuff_t *chunk_tvb, packet_info *pinfo, proto_tree *tree,
|
|
proto_tree *chunk_tree, proto_item *chunk_item, proto_item *flags_item)
|
|
{
|
|
guint8 flags;
|
|
guint16 length, total_payload_length, payload_length, padding_length, stream_id, stream_seq_number;
|
|
guint32 tsn, payload_proto_id;
|
|
proto_tree *flag_tree;
|
|
tvbuff_t *payload_tvb;
|
|
|
|
flags = tvb_get_guint8(chunk_tvb, CHUNK_FLAGS_OFFSET);
|
|
length = tvb_get_ntohs(chunk_tvb, CHUNK_LENGTH_OFFSET);
|
|
|
|
flag_tree = proto_item_add_subtree(flags_item, ett_sctp_data_chunk_flags);
|
|
proto_tree_add_boolean(flag_tree, hf_sctp_data_chunk_e_bit, chunk_tvb,
|
|
CHUNK_FLAGS_OFFSET, CHUNK_FLAGS_LENGTH, flags);
|
|
proto_tree_add_boolean(flag_tree, hf_sctp_data_chunk_b_bit, chunk_tvb,
|
|
CHUNK_FLAGS_OFFSET, CHUNK_FLAGS_LENGTH, flags);
|
|
proto_tree_add_boolean(flag_tree, hf_sctp_data_chunk_u_bit, chunk_tvb,
|
|
CHUNK_FLAGS_OFFSET, CHUNK_FLAGS_LENGTH, flags);
|
|
|
|
tsn = tvb_get_ntohl(chunk_tvb, DATA_CHUNK_TSN_OFFSET);
|
|
stream_id = tvb_get_ntohs(chunk_tvb, DATA_CHUNK_STREAM_ID_OFFSET);
|
|
stream_seq_number = tvb_get_ntohs(chunk_tvb, DATA_CHUNK_STREAM_SEQ_NUMBER_OFFSET);
|
|
payload_proto_id = tvb_get_ntohl(chunk_tvb, DATA_CHUNK_PAYLOAD_PROTOCOL_ID_OFFSET);
|
|
|
|
payload_length = length - DATA_CHUNK_HEADER_LENGTH;
|
|
padding_length = nr_of_padding_bytes(length);
|
|
total_payload_length = payload_length + padding_length;
|
|
payload_tvb = tvb_new_subset(chunk_tvb, DATA_CHUNK_PAYLOAD_OFFSET,
|
|
total_payload_length, total_payload_length);
|
|
|
|
proto_tree_add_uint(chunk_tree, hf_sctp_data_chunk_tsn,
|
|
chunk_tvb,
|
|
DATA_CHUNK_TSN_OFFSET, DATA_CHUNK_TSN_LENGTH,
|
|
tsn);
|
|
proto_tree_add_uint(chunk_tree, hf_sctp_data_chunk_stream_id,
|
|
chunk_tvb,
|
|
DATA_CHUNK_STREAM_ID_OFFSET, DATA_CHUNK_STREAM_ID_LENGTH,
|
|
stream_id);
|
|
proto_tree_add_uint(chunk_tree, hf_sctp_data_chunk_stream_seq_number,
|
|
chunk_tvb,
|
|
DATA_CHUNK_STREAM_SEQ_NUMBER_OFFSET, DATA_CHUNK_STREAM_SEQ_NUMBER_LENGTH,
|
|
stream_seq_number);
|
|
proto_tree_add_uint(chunk_tree, hf_sctp_data_chunk_payload_proto_id,
|
|
chunk_tvb,
|
|
DATA_CHUNK_PAYLOAD_PROTOCOL_ID_OFFSET, DATA_CHUNK_PAYLOAD_PROTOCOL_ID_LENGTH,
|
|
payload_proto_id);
|
|
proto_item_set_text(chunk_item, "DATA chunk with TSN %u (%u:%u) containing %u byte%s of payload",
|
|
tsn, stream_id, stream_seq_number,
|
|
payload_length, plurality(payload_length, "", "s"));
|
|
|
|
dissect_payload(payload_tvb, pinfo, tree, chunk_tree, payload_length, padding_length);
|
|
}
|
|
|
|
void
|
|
dissect_init_chunk(tvbuff_t *chunk_tvb, packet_info *pinfo, proto_tree *tree,
|
|
proto_tree *chunk_tree, proto_item *chunk_item, proto_item *flags_item)
|
|
{
|
|
guint32 initiate_tag, adv_rec_window_credit, initial_tsn;
|
|
guint16 number_of_inbound_streams, number_of_outbound_streams;
|
|
guint8 type;
|
|
tvbuff_t *parameter_list_tvb;
|
|
|
|
type = tvb_get_guint8(chunk_tvb, CHUNK_TYPE_OFFSET);
|
|
|
|
initiate_tag = tvb_get_ntohl(chunk_tvb, INIT_CHUNK_INITIATE_TAG_OFFSET);
|
|
adv_rec_window_credit = tvb_get_ntohl(chunk_tvb, INIT_CHUNK_ADV_REC_WINDOW_CREDIT_OFFSET);
|
|
number_of_inbound_streams = tvb_get_ntohs(chunk_tvb, INIT_CHUNK_NUMBER_OF_INBOUND_STREAMS_OFFSET);
|
|
number_of_outbound_streams = tvb_get_ntohs(chunk_tvb, INIT_CHUNK_NUMBER_OF_OUTBOUND_STREAMS_OFFSET);
|
|
initial_tsn = tvb_get_ntohl(chunk_tvb, INIT_CHUNK_INITIAL_TSN_OFFSET);
|
|
|
|
/* handle fixed parameters */
|
|
proto_tree_add_uint(chunk_tree, hf_sctp_init_chunk_initiate_tag,
|
|
chunk_tvb,
|
|
INIT_CHUNK_INITIATE_TAG_OFFSET, INIT_CHUNK_INITIATE_TAG_LENGTH,
|
|
initiate_tag);
|
|
proto_tree_add_uint(chunk_tree, hf_sctp_init_chunk_adv_rec_window_credit,
|
|
chunk_tvb,
|
|
INIT_CHUNK_ADV_REC_WINDOW_CREDIT_OFFSET, INIT_CHUNK_ADV_REC_WINDOW_CREDIT_LENGTH,
|
|
adv_rec_window_credit);
|
|
proto_tree_add_uint(chunk_tree, hf_sctp_init_chunk_number_of_outbound_streams,
|
|
chunk_tvb,
|
|
INIT_CHUNK_NUMBER_OF_OUTBOUND_STREAMS_OFFSET, INIT_CHUNK_NUMBER_OF_OUTBOUND_STREAMS_LENGTH,
|
|
number_of_outbound_streams);
|
|
proto_tree_add_uint(chunk_tree, hf_sctp_init_chunk_number_of_inbound_streams,
|
|
chunk_tvb,
|
|
INIT_CHUNK_NUMBER_OF_INBOUND_STREAMS_OFFSET, INIT_CHUNK_NUMBER_OF_INBOUND_STREAMS_LENGTH,
|
|
number_of_inbound_streams);
|
|
proto_tree_add_uint(chunk_tree, hf_sctp_init_chunk_initial_tsn,
|
|
chunk_tvb,
|
|
INIT_CHUNK_INITIAL_TSN_OFFSET, INIT_CHUNK_INITIAL_TSN_LENGTH,
|
|
initial_tsn);
|
|
|
|
/* handle variable paramters */
|
|
parameter_list_tvb = tvb_new_subset(chunk_tvb, INIT_CHUNK_VARIABLE_LENGTH_PARAMETER_OFFSET, -1, -1);
|
|
dissect_tlv_parameter_list(parameter_list_tvb, chunk_tree);
|
|
|
|
proto_item_set_text(chunk_item,
|
|
"%s chunk requesting for %u outbound stream%s and accepting up to %u inbound stream%s",
|
|
val_to_str(type, sctp_chunk_type_values, "unknown"),
|
|
number_of_outbound_streams, plurality(number_of_outbound_streams, "", "s"),
|
|
number_of_inbound_streams, plurality(number_of_inbound_streams, "", "s"));
|
|
}
|
|
|
|
void
|
|
dissect_init_ack_chunk(tvbuff_t *chunk_tvb, packet_info *pinfo, proto_tree *tree,
|
|
proto_tree *chunk_tree, proto_item *chunk_item, proto_item *flags_item)
|
|
{
|
|
dissect_init_chunk(chunk_tvb, pinfo, tree, chunk_tree, chunk_item, flags_item);
|
|
}
|
|
|
|
void
|
|
dissect_sack_chunk(tvbuff_t *chunk_tvb, packet_info *pinfo, proto_tree *tree,
|
|
proto_tree *chunk_tree, proto_item *chunk_item, proto_item *flags_item)
|
|
{
|
|
guint32 cumulative_tsn_ack, adv_rec_window_credit, dup_tsn;
|
|
guint16 number_of_gap_blocks, number_of_dup_tsns;
|
|
guint16 gap_block_number, dup_tsn_number, start, end;
|
|
gint gap_block_offset, dup_tsn_offset;
|
|
proto_item *block_item;
|
|
proto_tree *block_tree;
|
|
|
|
cumulative_tsn_ack = tvb_get_ntohl(chunk_tvb, SACK_CHUNK_CUMULATIVE_TSN_ACK_OFFSET);
|
|
adv_rec_window_credit = tvb_get_ntohl(chunk_tvb, SACK_CHUNK_ADV_REC_WINDOW_CREDIT_OFFSET);
|
|
number_of_gap_blocks = tvb_get_ntohs(chunk_tvb, SACK_CHUNK_NUMBER_OF_GAP_BLOCKS_OFFSET);
|
|
number_of_dup_tsns = tvb_get_ntohs(chunk_tvb, SACK_CHUNK_NUMBER_OF_DUP_TSNS_OFFSET);
|
|
|
|
proto_tree_add_uint(chunk_tree, hf_sctp_sack_chunk_cumulative_tsn_ack,
|
|
chunk_tvb,
|
|
SACK_CHUNK_CUMULATIVE_TSN_ACK_OFFSET, SACK_CHUNK_CUMULATIVE_TSN_ACK_LENGTH,
|
|
cumulative_tsn_ack);
|
|
proto_tree_add_uint(chunk_tree, hf_sctp_sack_chunk_adv_rec_window_credit,
|
|
chunk_tvb,
|
|
SACK_CHUNK_ADV_REC_WINDOW_CREDIT_OFFSET, SACK_CHUNK_ADV_REC_WINDOW_CREDIT_LENGTH,
|
|
adv_rec_window_credit);
|
|
proto_tree_add_uint(chunk_tree, hf_sctp_sack_chunk_number_of_gap_blocks,
|
|
chunk_tvb,
|
|
SACK_CHUNK_NUMBER_OF_GAP_BLOCKS_OFFSET, SACK_CHUNK_NUMBER_OF_GAP_BLOCKS_LENGTH,
|
|
number_of_gap_blocks);
|
|
proto_tree_add_uint(chunk_tree, hf_sctp_sack_chunk_number_of_dup_tsns,
|
|
chunk_tvb,
|
|
SACK_CHUNK_NUMBER_OF_DUP_TSNS_OFFSET, SACK_CHUNK_NUMBER_OF_DUP_TSNS_LENGTH,
|
|
number_of_dup_tsns);
|
|
|
|
/* handle the gap acknowledgement blocks */
|
|
gap_block_offset = SACK_CHUNK_GAP_BLOCK_OFFSET;
|
|
for(gap_block_number = 1; gap_block_number <= number_of_gap_blocks; gap_block_number++) {
|
|
start = tvb_get_ntohs(chunk_tvb, gap_block_offset);
|
|
end = tvb_get_ntohs(chunk_tvb, gap_block_offset + SACK_CHUNK_GAP_BLOCK_START_LENGTH);
|
|
block_item = proto_tree_add_text(chunk_tree, chunk_tvb,
|
|
gap_block_offset, SACK_CHUNK_GAP_BLOCK_LENGTH,
|
|
"Gap Acknowledgement for %u TSN%s",
|
|
1 + end - start, plurality(1 + end - start, "", "s"));
|
|
block_tree = proto_item_add_subtree(block_item, ett_sctp_sack_chunk_gap_block);
|
|
proto_tree_add_uint(block_tree, hf_sctp_sack_chunk_gap_block_start,
|
|
chunk_tvb,
|
|
gap_block_offset, SACK_CHUNK_GAP_BLOCK_START_LENGTH,
|
|
start);
|
|
proto_tree_add_uint(block_tree, hf_sctp_sack_chunk_gap_block_end,
|
|
chunk_tvb,
|
|
gap_block_offset + SACK_CHUNK_GAP_BLOCK_START_LENGTH,
|
|
SACK_CHUNK_GAP_BLOCK_END_LENGTH,
|
|
end);
|
|
gap_block_offset += SACK_CHUNK_GAP_BLOCK_LENGTH;
|
|
};
|
|
|
|
/* handle the duplicate TSNs */
|
|
dup_tsn_offset = SACK_CHUNK_GAP_BLOCK_OFFSET + number_of_gap_blocks * SACK_CHUNK_GAP_BLOCK_LENGTH;
|
|
for(dup_tsn_number = 1; dup_tsn_number <= number_of_dup_tsns; dup_tsn_number++) {
|
|
dup_tsn = tvb_get_ntohl(chunk_tvb, dup_tsn_offset);
|
|
proto_tree_add_uint(chunk_tree, hf_sctp_sack_chunk_duplicate_tsn,
|
|
chunk_tvb,
|
|
dup_tsn, SACK_CHUNK_DUP_TSN_LENGTH,
|
|
dup_tsn);
|
|
dup_tsn_offset += SACK_CHUNK_DUP_TSN_LENGTH;
|
|
};
|
|
|
|
proto_item_set_text(chunk_item,
|
|
"SACK chunk acknowledging TSN %u and reporting %u gap%s and %u duplicate TSN%s",
|
|
cumulative_tsn_ack,
|
|
number_of_gap_blocks, plurality(number_of_gap_blocks, "", "s"),
|
|
number_of_dup_tsns, plurality(number_of_dup_tsns, "", "s"));
|
|
}
|
|
|
|
void
|
|
dissect_heartbeat_chunk(tvbuff_t *chunk_tvb, packet_info *pinfo, proto_tree *tree,
|
|
proto_tree *chunk_tree, proto_item *chunk_item, proto_item *flags_item)
|
|
{
|
|
tvbuff_t *parameter_tvb;
|
|
guint chunk_length, info_length, padding_length, total_length;
|
|
|
|
chunk_length = tvb_get_ntohs(chunk_tvb, CHUNK_LENGTH_OFFSET);
|
|
info_length = chunk_length - CHUNK_HEADER_LENGTH;
|
|
padding_length = nr_of_padding_bytes(info_length);
|
|
total_length = info_length + padding_length;
|
|
parameter_tvb = tvb_new_subset(chunk_tvb, HEARTBEAT_CHUNK_INFO_OFFSET, total_length, total_length);
|
|
|
|
dissect_parameter(parameter_tvb, chunk_tree);
|
|
|
|
proto_item_set_text(chunk_item, "HEARTBEAT chunk");
|
|
}
|
|
|
|
void
|
|
dissect_heartbeat_ack_chunk(tvbuff_t *chunk_tvb, packet_info *pinfo, proto_tree *tree,
|
|
proto_tree *chunk_tree, proto_item *chunk_item, proto_item *flags_item)
|
|
{
|
|
tvbuff_t *parameter_tvb;
|
|
guint chunk_length, info_length, padding_length, total_length;
|
|
|
|
chunk_length = tvb_get_ntohs(chunk_tvb, CHUNK_LENGTH_OFFSET);
|
|
info_length = chunk_length - CHUNK_HEADER_LENGTH;
|
|
padding_length = nr_of_padding_bytes(info_length);
|
|
total_length = info_length + padding_length;
|
|
|
|
parameter_tvb = tvb_new_subset(chunk_tvb, HEARTBEAT_CHUNK_INFO_OFFSET, total_length, total_length);
|
|
|
|
dissect_parameter(parameter_tvb, chunk_tree);
|
|
|
|
proto_item_set_text(chunk_item, "HEARTBEAT ACK chunk");
|
|
}
|
|
|
|
void
|
|
dissect_abort_chunk(tvbuff_t *chunk_tvb, packet_info *pinfo, proto_tree *tree,
|
|
proto_tree *chunk_tree, proto_item *chunk_item, proto_item *flags_item)
|
|
{
|
|
guint offset, number_of_causes;
|
|
guint16 length, padding_length, total_length;
|
|
tvbuff_t *cause_tvb;
|
|
|
|
number_of_causes = 0;
|
|
offset = ABORT_CHUNK_FIRST_ERROR_CAUSE_OFFSET;
|
|
while(tvb_length_remaining(chunk_tvb, offset)) {
|
|
length = tvb_get_ntohs(chunk_tvb, offset + CAUSE_LENGTH_OFFSET);
|
|
padding_length = nr_of_padding_bytes(length);
|
|
total_length = length + padding_length;
|
|
/* create a tvb for the chunk including the padding bytes */
|
|
cause_tvb = tvb_new_subset(chunk_tvb, offset, total_length, total_length);
|
|
dissect_error_cause(cause_tvb, pinfo, chunk_tree);
|
|
/* get rid of the handled parameter */
|
|
offset += total_length;
|
|
number_of_causes++;
|
|
};
|
|
|
|
proto_item_set_text(chunk_item, "Abort chunk with %u cause%s",
|
|
number_of_causes, plurality(number_of_causes, "", "s"));
|
|
}
|
|
|
|
void
|
|
dissect_shutdown_chunk(tvbuff_t *chunk_tvb, packet_info *pinfo, proto_tree *tree,
|
|
proto_tree *chunk_tree, proto_item *chunk_item, proto_item *flags_item)
|
|
{
|
|
guint32 cumulative_tsn_ack;
|
|
|
|
cumulative_tsn_ack = tvb_get_ntohl(chunk_tvb, SHUTDOWN_CHUNK_CUMULATIVE_TSN_ACK_OFFSET);
|
|
proto_tree_add_uint(chunk_tree, hf_sctp_shutdown_chunk_cumulative_tsn_ack,
|
|
chunk_tvb,
|
|
SHUTDOWN_CHUNK_CUMULATIVE_TSN_ACK_OFFSET,
|
|
SHUTDOWN_CHUNK_CUMULATIVE_TSN_ACK_LENGTH,
|
|
cumulative_tsn_ack);
|
|
|
|
proto_item_set_text(chunk_item, "SHUTDOWN chunk acknowledging up to TSN %u",
|
|
cumulative_tsn_ack);
|
|
}
|
|
|
|
void
|
|
dissect_shutdown_ack_chunk(tvbuff_t *chunk_tvb, packet_info *pinfo, proto_tree *tree,
|
|
proto_tree *chunk_tree, proto_item *chunk_item, proto_item *flags_item)
|
|
{
|
|
proto_item_set_text(chunk_item, "SHUTDOWN ACK chunk");
|
|
}
|
|
|
|
void
|
|
dissect_error_chunk(tvbuff_t *chunk_tvb, packet_info *pinfo, proto_tree *tree,
|
|
proto_tree *chunk_tree, proto_item *chunk_item, proto_item *flags_item)
|
|
{
|
|
guint offset, number_of_causes;
|
|
guint16 length, padding_length, total_length;
|
|
tvbuff_t *cause_tvb;
|
|
|
|
number_of_causes = 0;
|
|
offset = ERROR_CHUNK_FIRST_ERROR_CAUSE_OFFSET;
|
|
do {
|
|
length = tvb_get_ntohs(chunk_tvb, offset + CAUSE_LENGTH_OFFSET);
|
|
padding_length = nr_of_padding_bytes(length);
|
|
total_length = length + padding_length;
|
|
/* create a tvb for the chunk including the padding bytes */
|
|
cause_tvb = tvb_new_subset(chunk_tvb, offset, total_length, total_length);
|
|
dissect_error_cause(cause_tvb, pinfo, chunk_tree);
|
|
/* get rid of the handled parameter */
|
|
offset += total_length;
|
|
number_of_causes++;
|
|
} while(tvb_length_remaining(chunk_tvb, offset));
|
|
|
|
proto_item_set_text(chunk_item, "Error chunk with %u cause%s",
|
|
number_of_causes, plurality(number_of_causes, "", "s"));
|
|
}
|
|
|
|
void
|
|
dissect_cookie_echo_chunk(tvbuff_t *chunk_tvb, packet_info *pinfo, proto_tree *tree,
|
|
proto_tree *chunk_tree, proto_item *chunk_item, proto_item *flags_item)
|
|
{
|
|
guint length, cookie_length, padding_length;
|
|
|
|
length = tvb_get_ntohs(chunk_tvb, CHUNK_LENGTH_OFFSET);
|
|
padding_length = nr_of_padding_bytes(length);
|
|
cookie_length = length - CHUNK_HEADER_LENGTH;
|
|
|
|
proto_tree_add_text(chunk_tree, chunk_tvb, COOKIE_ECHO_CHUNK_COOKIE_OFFSET, cookie_length,
|
|
"Cookie (%u byte%s)",
|
|
cookie_length, plurality(cookie_length, "", "s"));
|
|
proto_item_set_text(chunk_item, "COOKIE ECHO chunk containing a cookie of %u byte%s",
|
|
cookie_length, plurality(cookie_length, "", "s"));
|
|
|
|
if (padding_length > 0)
|
|
proto_tree_add_text(chunk_tree, chunk_tvb, CHUNK_HEADER_OFFSET + length, padding_length,
|
|
"Padding: %u byte%s",
|
|
padding_length, plurality(padding_length, "", "s"));
|
|
}
|
|
|
|
void
|
|
dissect_cookie_ack_chunk(tvbuff_t *chunk_tvb, packet_info *pinfo, proto_tree *tree,
|
|
proto_tree *chunk_tree, proto_item *chunk_item, proto_item *flags_item)
|
|
{
|
|
proto_item_set_text(chunk_item, "COOKIE ACK chunk");
|
|
}
|
|
|
|
void
|
|
dissect_ecne_chunk(tvbuff_t *chunk_tvb, packet_info *pinfo, proto_tree *tree,
|
|
proto_tree *chunk_tree, proto_item *chunk_item, proto_item *flags_item)
|
|
{
|
|
guint32 lowest_tsn;
|
|
|
|
lowest_tsn = tvb_get_ntohl(chunk_tvb, ECNE_CHUNK_LOWEST_TSN_OFFSET);
|
|
proto_tree_add_uint(chunk_tree, hf_sctp_ecne_chunk_lowest_tsn,
|
|
chunk_tvb,
|
|
ECNE_CHUNK_LOWEST_TSN_OFFSET, ECNE_CHUNK_LOWEST_TSN_LENGTH,
|
|
lowest_tsn);
|
|
|
|
proto_item_set_text(chunk_item, "ECNE chunk");
|
|
}
|
|
|
|
void
|
|
dissect_cwr_chunk(tvbuff_t *chunk_tvb, packet_info *pinfo, proto_tree *tree,
|
|
proto_tree *chunk_tree, proto_item *chunk_item, proto_item *flags_item)
|
|
{
|
|
guint32 lowest_tsn;
|
|
|
|
lowest_tsn = tvb_get_ntohl(chunk_tvb, CWR_CHUNK_LOWEST_TSN_OFFSET);
|
|
proto_tree_add_uint(chunk_tree, hf_sctp_cwr_chunk_lowest_tsn,
|
|
chunk_tvb,
|
|
CWR_CHUNK_LOWEST_TSN_OFFSET, CWR_CHUNK_LOWEST_TSN_LENGTH,
|
|
lowest_tsn);
|
|
|
|
proto_item_set_text(chunk_item, "CWR chunk");
|
|
}
|
|
|
|
void
|
|
dissect_shutdown_complete_chunk(tvbuff_t *chunk_tvb, packet_info *pinfo, proto_tree *tree,
|
|
proto_tree *chunk_tree, proto_item *chunk_item, proto_item *flags_item)
|
|
{
|
|
guint8 flags;
|
|
guint16 length;
|
|
proto_tree *flag_tree;
|
|
|
|
flags = tvb_get_guint8(chunk_tvb, CHUNK_FLAGS_OFFSET);
|
|
length = tvb_get_ntohs(chunk_tvb, CHUNK_LENGTH_OFFSET);
|
|
|
|
flag_tree = proto_item_add_subtree(flags_item, ett_sctp_data_chunk_flags);
|
|
proto_tree_add_boolean(flag_tree, hf_sctp_shutdown_complete_chunk_t_bit, chunk_tvb,
|
|
CHUNK_FLAGS_OFFSET, CHUNK_FLAGS_LENGTH, flags);
|
|
|
|
proto_item_set_text(chunk_item, "SHUTDOWN COMPLETE chunk");
|
|
}
|
|
|
|
void
|
|
dissect_unknown_chunk(tvbuff_t *chunk_tvb, packet_info *pinfo, proto_tree *tree,
|
|
proto_tree *chunk_tree, proto_item *chunk_item, proto_item *flags_item)
|
|
{
|
|
guint length, chunk_value_length, padding_length;
|
|
guint8 type;
|
|
|
|
length = tvb_get_ntohs(chunk_tvb, CHUNK_LENGTH_OFFSET);
|
|
padding_length = nr_of_padding_bytes(length);
|
|
type = tvb_get_guint8(chunk_tvb, CHUNK_TYPE_OFFSET);
|
|
|
|
chunk_value_length = length - CHUNK_HEADER_LENGTH;
|
|
|
|
proto_tree_add_text(chunk_tree, chunk_tvb, CHUNK_VALUE_OFFSET, chunk_value_length,
|
|
"Chunk value (%u byte%s)",
|
|
chunk_value_length, plurality(chunk_value_length, "", "s"));
|
|
|
|
if (padding_length > 0)
|
|
proto_tree_add_text(chunk_tree, chunk_tvb, CHUNK_HEADER_OFFSET + length, padding_length,
|
|
"Padding: %u byte%s",
|
|
padding_length, plurality(padding_length, "", "s"));
|
|
|
|
proto_item_set_text(chunk_item, "Chunk of type %u and %u byte%s value",
|
|
type, chunk_value_length, plurality(chunk_value_length, "", "s"));
|
|
|
|
|
|
}
|
|
|
|
|
|
void
|
|
dissect_sctp_chunk(tvbuff_t *chunk_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *sctp_tree)
|
|
{
|
|
guint8 type, flags;
|
|
guint16 length;
|
|
proto_item *flags_item;
|
|
proto_item *chunk_item;
|
|
proto_tree *chunk_tree;
|
|
|
|
/* first extract the chunk header */
|
|
type = tvb_get_guint8(chunk_tvb, CHUNK_TYPE_OFFSET);
|
|
flags = tvb_get_guint8(chunk_tvb, CHUNK_FLAGS_OFFSET);
|
|
length = tvb_get_ntohs(chunk_tvb, CHUNK_LENGTH_OFFSET);
|
|
|
|
/* create proto_tree stuff */
|
|
chunk_item = proto_tree_add_text(sctp_tree, chunk_tvb,
|
|
CHUNK_HEADER_OFFSET, tvb_length(chunk_tvb), "Incomplete chunk");
|
|
chunk_tree = proto_item_add_subtree(chunk_item, ett_sctp_chunk);
|
|
|
|
/* then insert the chunk header components into the protocol tree */
|
|
proto_tree_add_uint_format(chunk_tree, hf_sctp_chunk_type,
|
|
chunk_tvb, CHUNK_TYPE_OFFSET, CHUNK_TYPE_LENGTH,
|
|
type, "Identifier: %u (%s)",
|
|
type, val_to_str(type, sctp_chunk_type_values, "unknown"));
|
|
flags_item = proto_tree_add_uint(chunk_tree, hf_sctp_chunk_flags,
|
|
chunk_tvb, CHUNK_FLAGS_OFFSET, CHUNK_FLAGS_LENGTH,
|
|
flags);
|
|
proto_tree_add_uint(chunk_tree, hf_sctp_chunk_length,
|
|
chunk_tvb, CHUNK_LENGTH_OFFSET, CHUNK_LENGTH_LENGTH,
|
|
length);
|
|
|
|
/* now dissect the chunk value */
|
|
switch(type) {
|
|
case SCTP_DATA_CHUNK_ID:
|
|
dissect_data_chunk(chunk_tvb, pinfo, tree, chunk_tree, chunk_item, flags_item);
|
|
break;
|
|
case SCTP_INIT_CHUNK_ID:
|
|
dissect_init_chunk(chunk_tvb, pinfo, tree, chunk_tree, chunk_item, flags_item);
|
|
break;
|
|
case SCTP_INIT_ACK_CHUNK_ID:
|
|
dissect_init_ack_chunk(chunk_tvb, pinfo, tree, chunk_tree, chunk_item, flags_item);
|
|
break;
|
|
case SCTP_SACK_CHUNK_ID:
|
|
dissect_sack_chunk(chunk_tvb, pinfo, tree, chunk_tree, chunk_item, flags_item);
|
|
break;
|
|
case SCTP_HEARTBEAT_CHUNK_ID:
|
|
dissect_heartbeat_chunk(chunk_tvb, pinfo, tree, chunk_tree, chunk_item, flags_item);
|
|
break;
|
|
case SCTP_HEARTBEAT_ACK_CHUNK_ID:
|
|
dissect_heartbeat_ack_chunk(chunk_tvb, pinfo, tree, chunk_tree, chunk_item, flags_item);
|
|
break;
|
|
case SCTP_ABORT_CHUNK_ID:
|
|
dissect_abort_chunk(chunk_tvb, pinfo, tree, chunk_tree, chunk_item, flags_item);
|
|
break;
|
|
case SCTP_SHUTDOWN_CHUNK_ID:
|
|
dissect_shutdown_chunk(chunk_tvb, pinfo, tree, chunk_tree, chunk_item, flags_item);
|
|
break;
|
|
case SCTP_SHUTDOWN_ACK_CHUNK_ID:
|
|
dissect_shutdown_ack_chunk(chunk_tvb, pinfo, tree, chunk_tree, chunk_item, flags_item);
|
|
break;
|
|
case SCTP_ERROR_CHUNK_ID:
|
|
dissect_error_chunk(chunk_tvb, pinfo, tree, chunk_tree, chunk_item, flags_item);
|
|
break;
|
|
case SCTP_COOKIE_ECHO_CHUNK_ID:
|
|
dissect_cookie_echo_chunk(chunk_tvb, pinfo, tree, chunk_tree, chunk_item, flags_item);
|
|
break;
|
|
case SCTP_COOKIE_ACK_CHUNK_ID:
|
|
dissect_cookie_ack_chunk(chunk_tvb, pinfo, tree, chunk_tree, chunk_item, flags_item);
|
|
break;
|
|
case SCTP_ECNE_CHUNK_ID:
|
|
dissect_ecne_chunk(chunk_tvb, pinfo, tree, chunk_tree, chunk_item, flags_item);
|
|
break;
|
|
case SCTP_CWR_CHUNK_ID:
|
|
dissect_cwr_chunk(chunk_tvb, pinfo, tree, chunk_tree, chunk_item, flags_item);
|
|
break;
|
|
case SCTP_SHUTDOWN_COMPLETE_CHUNK_ID:
|
|
dissect_shutdown_complete_chunk(chunk_tvb, pinfo, tree, chunk_tree, chunk_item, flags_item);
|
|
break;
|
|
default:
|
|
dissect_unknown_chunk(chunk_tvb, pinfo, tree, chunk_tree, chunk_item, flags_item);
|
|
break;
|
|
}
|
|
}
|
|
|
|
void
|
|
dissect_sctp_chunks(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, proto_tree *sctp_tree)
|
|
{
|
|
tvbuff_t *chunk_tvb;
|
|
guint16 length, padding_length, total_length;
|
|
gint offset;
|
|
|
|
/* the common header of the datagram is already handled */
|
|
offset = COMMON_HEADER_LENGTH;
|
|
|
|
while(tvb_length_remaining(tvb, offset) > 0) {
|
|
/* extract the chunk length and compute number of padding bytes */
|
|
length = tvb_get_ntohs(tvb, offset + CHUNK_LENGTH_OFFSET);
|
|
padding_length = nr_of_padding_bytes(length);
|
|
total_length = length + padding_length;
|
|
/* create a tvb for the chunk including the padding bytes */
|
|
chunk_tvb = tvb_new_subset(tvb, offset, total_length, total_length);
|
|
/* call dissect_sctp_chunk for a actual work */
|
|
dissect_sctp_chunk(chunk_tvb, pinfo, tree, sctp_tree);
|
|
/* get rid of the dissected chunk */
|
|
offset += total_length;
|
|
}
|
|
}
|
|
|
|
|
|
|
|
/* dissect_sctp handles the common header of a SCTP datagram.
|
|
* For the handling of the chunks dissect_sctp_chunks is called.
|
|
*/
|
|
|
|
static void
|
|
dissect_sctp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
|
|
{
|
|
guint16 source_port, destination_port;
|
|
guint32 verification_tag, checksum;
|
|
proto_item *ti;
|
|
proto_tree *sctp_tree;
|
|
|
|
CHECK_DISPLAY_AS_DATA(proto_sctp, tvb, pinfo, tree);
|
|
|
|
pinfo->current_proto = "SCTP";
|
|
|
|
/* Extract the common header */
|
|
source_port = tvb_get_ntohs(tvb, SOURCE_PORT_OFFSET);
|
|
destination_port = tvb_get_ntohs(tvb, DESTINATION_PORT_OFFSET);
|
|
verification_tag = tvb_get_ntohl(tvb, VERIFICATION_TAG_OFFSET);
|
|
checksum = tvb_get_ntohl(tvb, CHECKSUM_OFFSET);
|
|
|
|
/* update pi structure */
|
|
pi.ptype = PT_SCTP;
|
|
pi.srcport = source_port;
|
|
pi.destport = destination_port;
|
|
|
|
/* make entry in the Protocol column on summary display */
|
|
if (check_col(pinfo->fd, COL_PROTOCOL))
|
|
col_add_str(pinfo->fd, COL_PROTOCOL, "SCTP");
|
|
|
|
/* Make entries in Info column on summary display */
|
|
if (check_col(pinfo->fd, COL_INFO))
|
|
col_add_fstr(pinfo->fd, COL_INFO, "%u > %u: tag 0x%x",
|
|
source_port, destination_port, verification_tag);
|
|
|
|
/* In the interest of speed, if "tree" is NULL, don't do any work not
|
|
necessary to generate protocol tree items. */
|
|
if (tree) {
|
|
/* create the sctp protocol tree */
|
|
ti = proto_tree_add_protocol_format(tree, proto_sctp, tvb, 0, tvb_length(tvb),
|
|
"Stream Control Transmission Protocol");
|
|
sctp_tree = proto_item_add_subtree(ti, ett_sctp);
|
|
|
|
/* add the components of the common header to the protocol tree */
|
|
proto_tree_add_uint(sctp_tree, hf_sctp_source_port,
|
|
tvb, SOURCE_PORT_OFFSET, SOURCE_PORT_LENGTH,
|
|
source_port);
|
|
proto_tree_add_uint(sctp_tree, hf_sctp_destination_port,
|
|
tvb, DESTINATION_PORT_OFFSET, DESTINATION_PORT_LENGTH,
|
|
destination_port);
|
|
proto_tree_add_uint(sctp_tree, hf_sctp_verification_tag,
|
|
tvb, VERIFICATION_TAG_OFFSET, VERIFICATION_TAG_LENGTH,
|
|
verification_tag);
|
|
proto_tree_add_uint_format(sctp_tree, hf_sctp_checksum,
|
|
tvb, CHECKSUM_OFFSET, CHECKSUM_LENGTH, checksum,
|
|
"Adler-32 checksum: 0x%08x (%s)",
|
|
checksum, sctp_checksum_state(tvb, checksum));
|
|
|
|
/* add all chunks of the sctp datagram to the protocol tree */
|
|
dissect_sctp_chunks(tvb, pinfo, tree, sctp_tree);
|
|
};
|
|
}
|
|
|
|
/* Register the protocol with Ethereal */
|
|
void
|
|
proto_register_sctp(void)
|
|
{
|
|
|
|
/* Setup list of header fields */
|
|
static hf_register_info hf[] = {
|
|
{ &hf_sctp_source_port,
|
|
{ "Source port", "sctp.srcport",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
""}
|
|
},
|
|
{ &hf_sctp_destination_port,
|
|
{ "Destination port", "sctp.dstport",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
""}
|
|
},
|
|
{ &hf_sctp_verification_tag,
|
|
{ "Verification tag", "sctp.verfication_tag",
|
|
FT_UINT32, BASE_HEX, NULL, 0x0,
|
|
""}
|
|
},
|
|
{ &hf_sctp_checksum,
|
|
{ "Adler-32 checksum", "sctp.checksum",
|
|
FT_UINT32, BASE_HEX, NULL, 0x0,
|
|
""}
|
|
},
|
|
{ &hf_sctp_chunk_type,
|
|
{ "Identifier", "sctp.chunk_type",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
""}
|
|
},
|
|
{ &hf_sctp_chunk_flags,
|
|
{ "Flags", "sctp.chunk_flags",
|
|
FT_UINT8, BASE_BIN, NULL, 0x0,
|
|
""}
|
|
},
|
|
{ &hf_sctp_chunk_length,
|
|
{ "Length", "sctp.chunk_length",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
""}
|
|
},
|
|
{ &hf_sctp_init_chunk_initiate_tag,
|
|
{ "Initiate tag", "sctp.init.chunk.initiate.tag",
|
|
FT_UINT32, BASE_HEX, NULL, 0x0,
|
|
""}
|
|
},
|
|
{ &hf_sctp_init_chunk_adv_rec_window_credit,
|
|
{ "Advertised reciever window credit (a_rwnd)", "sctp.init.chunk.credit",
|
|
FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
""}
|
|
},
|
|
{ &hf_sctp_init_chunk_number_of_outbound_streams,
|
|
{ "Number of outbound streams", "sctp.init.chunk.nr.out.streams",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
""}
|
|
},
|
|
{ &hf_sctp_init_chunk_number_of_inbound_streams,
|
|
{ "Number of inbound streams", "sctp.init.chunk.nr.in.streams",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
""}
|
|
},
|
|
{&hf_sctp_init_chunk_initial_tsn,
|
|
{ "Initial TSN", "sctp.init.chunk.initial.tsn",
|
|
FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
""}
|
|
},
|
|
{&hf_sctp_cumulative_tsn_ack,
|
|
{ "Cumulative TSN Ack", "sctp.cumulative.tsn.ack",
|
|
FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
""}
|
|
},
|
|
{&hf_sctp_data_chunk_tsn,
|
|
{ "TSN", "sctp.tsn",
|
|
FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
""}
|
|
},
|
|
{&hf_sctp_data_chunk_stream_id,
|
|
{ "Stream Identifier", "sctp.stream_id",
|
|
FT_UINT16, BASE_HEX, NULL, 0x0,
|
|
""}
|
|
},
|
|
{&hf_sctp_data_chunk_stream_seq_number,
|
|
{ "Stream sequence number", "sctp.stream_seq_number",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
""}
|
|
},
|
|
{&hf_sctp_data_chunk_payload_proto_id,
|
|
{ "Payload Protocol identifier", "sctp.payload_proto_id",
|
|
FT_UINT32, BASE_HEX, NULL, 0x0,
|
|
""}
|
|
},
|
|
{&hf_sctp_data_chunk_e_bit,
|
|
{ "E-Bit", "sctp.data.e_bit",
|
|
FT_BOOLEAN, 8, TFS(&sctp_data_chunk_e_bit_value), SCTP_DATA_CHUNK_E_BIT,
|
|
""}
|
|
},
|
|
{&hf_sctp_data_chunk_b_bit,
|
|
{ "B-Bit", "sctp.data.b_bit",
|
|
FT_BOOLEAN, 8, TFS(&sctp_data_chunk_b_bit_value), SCTP_DATA_CHUNK_B_BIT,
|
|
""}
|
|
},
|
|
{&hf_sctp_data_chunk_u_bit,
|
|
{ "U-Bit", "sctp.data.u.bit",
|
|
FT_BOOLEAN, 8, TFS(&sctp_data_chunk_u_bit_value), SCTP_DATA_CHUNK_U_BIT,
|
|
""}
|
|
},
|
|
{&hf_sctp_sack_chunk_cumulative_tsn_ack,
|
|
{ "Cumulative TSN ACK", "sctp.sack.cumulative_tsn_ack",
|
|
FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
""}
|
|
},
|
|
{&hf_sctp_sack_chunk_adv_rec_window_credit,
|
|
{ "Advertised receiver window credit (a_rwnd)", "sctp.sack.a_rwnd",
|
|
FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
""}
|
|
},
|
|
{&hf_sctp_sack_chunk_number_of_gap_blocks,
|
|
{ "Number of gap acknowldgement blocks ", "sctp.sack.number_of_gap_blocks",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
""}
|
|
},
|
|
{&hf_sctp_sack_chunk_number_of_dup_tsns,
|
|
{ "Number of duplicated TSNs", "sctp.sack.number_of_duplicated_tsns",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
""}
|
|
},
|
|
{&hf_sctp_sack_chunk_gap_block_start,
|
|
{ "Start", "sctp.sack.gap_block_start",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
""}
|
|
},
|
|
{&hf_sctp_sack_chunk_gap_block_end,
|
|
{ "End", "sctp.sack.gap_block_end",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
""}
|
|
},
|
|
{&hf_sctp_sack_chunk_duplicate_tsn,
|
|
{ "Duplicate TSN", "sctp.sack.duplicate.tsn",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
""}
|
|
},
|
|
{&hf_sctp_shutdown_chunk_cumulative_tsn_ack,
|
|
{ "Cumulative TSN Ack", "sctp.shutdown.cumulative_tsn_ack",
|
|
FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
""}
|
|
},
|
|
{&hf_sctp_ecne_chunk_lowest_tsn,
|
|
{ "Lowest TSN", "sctp.ecne.lowest_tsn",
|
|
FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
""}
|
|
},
|
|
{&hf_sctp_cwr_chunk_lowest_tsn,
|
|
{ "Lowest TSN", "sctp.cwr.lowest_tsn",
|
|
FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
""}
|
|
},
|
|
{&hf_sctp_shutdown_complete_chunk_t_bit,
|
|
{ "E-Bit", "sctp.shutdown_complete.t_bit",
|
|
FT_BOOLEAN, 8, TFS(&sctp_shutdown_complete_chunk_t_bit_value), SCTP_SHUTDOWN_COMPLETE_CHUNK_T_BIT,
|
|
""}
|
|
},
|
|
{&hf_sctp_chunk_parameter_type,
|
|
{ "Parameter type", "sctp.parameter.type",
|
|
FT_UINT16, BASE_HEX, NULL, 0x0,
|
|
""}
|
|
},
|
|
{&hf_sctp_chunk_parameter_length,
|
|
{ "Parameter length", "sctp.parameter.length",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
""}
|
|
},
|
|
{&hf_sctp_parameter_ipv4_address,
|
|
{ "IP Version 4 address", "sctp.parameter.ipv4_address",
|
|
FT_IPv4, BASE_NONE, NULL, 0x0,
|
|
""}
|
|
},
|
|
{&hf_sctp_parameter_ipv6_address,
|
|
{ "IP Version 6 address", "sctp.parameter.ipv6_address",
|
|
FT_IPv6, BASE_NONE, NULL, 0x0,
|
|
""}
|
|
},
|
|
{&hf_sctp_parameter_cookie_preservative_increment,
|
|
{ "Suggested Cookie life-span increment (msec)", "sctp.parameter.cookie_preservative_incr",
|
|
FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
""}
|
|
},
|
|
{&hf_sctp_parameter_hostname_hostname,
|
|
{ "Hostname", "sctp.parameter.hostname.hostname",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
""}
|
|
},
|
|
{&hf_sctp_supported_address_types_parameter,
|
|
{ "Supported address type", "sctp.parameter.supported_addres_type",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
""}
|
|
},
|
|
{&hf_sctp_cause_code,
|
|
{ "Cause code", "sctp.cause.code",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
""}
|
|
},
|
|
{&hf_sctp_cause_length,
|
|
{ "Cause length", "sctp.cause.length",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
""}
|
|
},
|
|
{&hf_sctp_cause_stream_identifier,
|
|
{ "Stream identifier", "sctp.cause.stream_identifier",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
""}
|
|
},
|
|
{&hf_sctp_cause_number_of_missing_parameters,
|
|
{ "Number of missing parameters", "sctp.cause.nr_of_missing_parameters",
|
|
FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
""}
|
|
},
|
|
{&hf_sctp_cause_missing_parameter_type,
|
|
{ "Missing parameters type", "sctp.cause.missing_parameter_type",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
""}
|
|
},
|
|
{&hf_sctp_cause_measure_of_staleness,
|
|
{ "Measure of staleness in usec", "sctp.cause.measure_of_staleness",
|
|
FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
""}
|
|
},
|
|
{&hf_sctp_cause_tsn,
|
|
{ "TSN", "sctp.cause.tsn",
|
|
FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
""}
|
|
},
|
|
};
|
|
|
|
/* Setup protocol subtree array */
|
|
static gint *ett[] = {
|
|
&ett_sctp,
|
|
&ett_sctp_chunk,
|
|
&ett_sctp_chunk_parameter,
|
|
&ett_sctp_chunk_cause,
|
|
&ett_sctp_data_chunk_flags,
|
|
&ett_sctp_sack_chunk_gap_block,
|
|
&ett_sctp_supported_address_types_parameter,
|
|
&ett_sctp_unrecognized_parameter_parameter
|
|
};
|
|
|
|
/* Register the protocol name and description */
|
|
proto_sctp = proto_register_protocol("Stream Control Transmission Protcol",
|
|
"sctp");
|
|
|
|
/* Required function calls to register the header fields and subtrees used */
|
|
proto_register_field_array(proto_sctp, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
|
|
/* subdissector code */
|
|
sctp_dissector_table = register_dissector_table("sctp.port");
|
|
|
|
};
|
|
|
|
void
|
|
proto_reg_handoff_sctp(void)
|
|
{
|
|
dissector_add("ip.proto", IP_PROTO_SCTP, dissect_sctp);
|
|
}
|