2551 lines
100 KiB
C
2551 lines
100 KiB
C
/* packet-sctp.c
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* Routines for Stream Control Transmission Protocol dissection
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* It should be compilant to
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* - RFC 2960, for basic SCTP support
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* - http://www.ietf.org/internet-drafts/draft-ietf-tsvwg-addip-sctp-03.txt for the add-IP extension
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* - http://www.sctp.org/draft-ietf-tsvwg-usctp-01.txt for the 'Limited Retransmission' extension
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* - http://www.ietf.org/internet-drafts/draft-ietf-tsvwg-sctpcsum-03.txt
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* Copyright 2000, 2001, 2002, Michael Tuexen <Michael.Tuexen@icn.siemens.de>
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* Still to do (so stay tuned)
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* - support for reassembly
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* - code cleanup
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*
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* $Id: packet-sctp.c,v 1.35 2002/04/16 19:58:53 guy Exp $
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@ethereal.com>
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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 "prefs.h"
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#include <epan/packet.h>
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#include "ipproto.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_port = -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_checksum_bad = -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 int hf_sctp_forward_tsn_chunk_tsn = -1;
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static int hf_sctp_ustreams_start = -1;
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static int hf_sctp_ustreams_end = -1;
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static int hf_sctp_asconf_ack_serial = -1;
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static int hf_sctp_asconf_ack_correlation_id = -1;
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static int hf_sctp_asconf_serial = -1;
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static int hf_sctp_asconf_correlation_id = -1;
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static int hf_sctp_asconf_reserved = -1;
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static int hf_sctp_asconf_addr_type = -1;
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static int hf_sctp_asconf_addr = -1;
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static int hf_sctp_asconf_ipv4_address = -1;
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static int hf_sctp_asconf_ipv6_address = -1;
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static int hf_sctp_adap_indication = -1;
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static int hf_sctp_abort_chunk_t_bit = -1;
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static dissector_table_t sctp_port_dissector_table;
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static dissector_table_t sctp_ppi_dissector_table;
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static module_t *sctp_module;
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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_shutdown_complete_chunk_flags = -1;
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static gint ett_sctp_abort_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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static gint ett_sctp_unreliable_streams_interval = -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_FORWARD_TSN_CHUNK_ID 192
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#define SCTP_ASCONF_ACK_CHUNK_ID 0x80
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#define SCTP_ASCONF_CHUNK_ID 0XC1
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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_FORWARD_TSN_CHUNK_ID, "FORWARD TSN" },
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{ SCTP_ASCONF_ACK_CHUNK_ID, "ASCONF_ACK" },
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{ SCTP_ASCONF_CHUNK_ID, "ASCONF" },
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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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#define UNRELIABLE_STREAMS_PARAMETER_ID 0xC000
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#define ADD_IP_ADDRESS_PARAMETER_ID 0xC001
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#define DEL_IP_ADDRESS_PARAMETER_ID 0xC002
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#define ERROR_CAUSE_INDICATION_PARAMETER_ID 0xC003
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#define SET_PRIMARY_ADDRESS_PARAMETER_ID 0xC004
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#define SUCCESS_REPORT_PARAMETER_ID 0xC005
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#define ADAP_LAYER_INDICATION_PARAMETER_ID 0xC006
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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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{ UNRELIABLE_STREAMS_PARAMETER_ID, "Unreliable streams" },
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{ ADD_IP_ADDRESS_PARAMETER_ID, "Add IP address" },
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{ DEL_IP_ADDRESS_PARAMETER_ID, "Delete IP address" },
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{ ERROR_CAUSE_INDICATION_PARAMETER_ID, "Error cause indication" },
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{ SET_PRIMARY_ADDRESS_PARAMETER_ID, "Set primary address" },
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{ SUCCESS_REPORT_PARAMETER_ID, "Success report" },
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{ ADAP_LAYER_INDICATION_PARAMETER_ID, "Adaptation Layer Indication" },
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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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#define REQUEST_TO_DELETE_LAST_ADDRESS 0x0c
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#define OPERATION_REFUSED_DUE_TO_RESOURCE_SHORTAGE 0X0d
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#define REQUEST_TO_DELETE_SOURCE_ADDRESS 0x0e
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static const value_string sctp_cause_code_values[] = {
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{ INVALID_STREAM_IDENTIFIER, "Invalid stream identifier" },
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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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{ REQUEST_TO_DELETE_LAST_ADDRESS, "Request to delete last address" },
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{ OPERATION_REFUSED_DUE_TO_RESOURCE_SHORTAGE, "Operation refused due to resource shortage" },
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{ REQUEST_TO_DELETE_SOURCE_ADDRESS, "Request to delete source address" },
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{ 0, NULL } };
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#define NOT_SPECIFIED_PROTOCOL_ID 0
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#define IUA_PAYLOAD_PROTOCOL_ID 1
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#define M2UA_PAYLOAD_PROTOCOL_ID 2
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#define M3UA_PAYLOAD_PROTOCOL_ID 3
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#define SUA_PAYLOAD_PROTOCOL_ID 4
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#define M2PA_PAYLOAD_PROTOCOL_ID 5
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#define V5UA_PAYLOAD_PROTOCOL_ID 6
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static const value_string sctp_payload_proto_id_values[] = {
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{ NOT_SPECIFIED_PROTOCOL_ID, "not specified" },
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{ IUA_PAYLOAD_PROTOCOL_ID, "IUA" },
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{ M2UA_PAYLOAD_PROTOCOL_ID, "M2UA" },
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{ M3UA_PAYLOAD_PROTOCOL_ID, "M3UA" },
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{ SUA_PAYLOAD_PROTOCOL_ID, "SUA" },
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{ M2PA_PAYLOAD_PROTOCOL_ID, "M2PA" },
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{ V5UA_PAYLOAD_PROTOCOL_ID, "V5UA" },
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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)
|
|
#define DATA_CHUNK_STREAM_ID_OFFSET (DATA_CHUNK_TSN_OFFSET + DATA_CHUNK_TSN_LENGTH)
|
|
#define DATA_CHUNK_STREAM_SEQ_NUMBER_OFFSET (DATA_CHUNK_STREAM_ID_OFFSET + \
|
|
DATA_CHUNK_STREAM_SEQ_NUMBER_LENGTH)
|
|
#define DATA_CHUNK_PAYLOAD_PROTOCOL_ID_OFFSET (DATA_CHUNK_STREAM_SEQ_NUMBER_OFFSET + \
|
|
DATA_CHUNK_STREAM_SEQ_NUMBER_LENGTH)
|
|
#define DATA_CHUNK_PAYLOAD_OFFSET (DATA_CHUNK_PAYLOAD_PROTOCOL_ID_OFFSET + \
|
|
DATA_CHUNK_PAYLOAD_PROTOCOL_ID_LENGTH)
|
|
|
|
#define DATA_CHUNK_HEADER_LENGTH (CHUNK_HEADER_LENGTH + \
|
|
DATA_CHUNK_TSN_LENGTH + \
|
|
DATA_CHUNK_STREAM_ID_LENGTH + \
|
|
DATA_CHUNK_STREAM_SEQ_NUMBER_LENGTH + \
|
|
DATA_CHUNK_PAYLOAD_PROTOCOL_ID_LENGTH)
|
|
|
|
#define SCTP_DATA_CHUNK_E_BIT 0x01
|
|
#define SCTP_DATA_CHUNK_B_BIT 0x02
|
|
#define SCTP_DATA_CHUNK_U_BIT 0x04
|
|
|
|
#define INIT_CHUNK_INITIATE_TAG_LENGTH 4
|
|
#define INIT_CHUNK_ADV_REC_WINDOW_CREDIT_LENGTH 4
|
|
#define INIT_CHUNK_NUMBER_OF_OUTBOUND_STREAMS_LENGTH 2
|
|
#define INIT_CHUNK_NUMBER_OF_INBOUND_STREAMS_LENGTH 2
|
|
#define INIT_CHUNK_INITIAL_TSN_LENGTH 4
|
|
|
|
#define INIT_CHUNK_INITIATE_TAG_OFFSET CHUNK_VALUE_OFFSET
|
|
#define INIT_CHUNK_ADV_REC_WINDOW_CREDIT_OFFSET (INIT_CHUNK_INITIATE_TAG_OFFSET + \
|
|
INIT_CHUNK_INITIATE_TAG_LENGTH )
|
|
#define INIT_CHUNK_NUMBER_OF_OUTBOUND_STREAMS_OFFSET (INIT_CHUNK_ADV_REC_WINDOW_CREDIT_OFFSET + \
|
|
INIT_CHUNK_ADV_REC_WINDOW_CREDIT_LENGTH )
|
|
#define INIT_CHUNK_NUMBER_OF_INBOUND_STREAMS_OFFSET (INIT_CHUNK_NUMBER_OF_OUTBOUND_STREAMS_OFFSET + \
|
|
INIT_CHUNK_NUMBER_OF_OUTBOUND_STREAMS_LENGTH )
|
|
#define INIT_CHUNK_INITIAL_TSN_OFFSET (INIT_CHUNK_NUMBER_OF_INBOUND_STREAMS_OFFSET + \
|
|
INIT_CHUNK_NUMBER_OF_INBOUND_STREAMS_LENGTH )
|
|
#define INIT_CHUNK_VARIABLE_LENGTH_PARAMETER_OFFSET (INIT_CHUNK_INITIAL_TSN_OFFSET + \
|
|
INIT_CHUNK_INITIAL_TSN_LENGTH )
|
|
|
|
|
|
#define SACK_CHUNK_CUMULATIVE_TSN_ACK_LENGTH 4
|
|
#define SACK_CHUNK_ADV_REC_WINDOW_CREDIT_LENGTH 4
|
|
#define SACK_CHUNK_NUMBER_OF_GAP_BLOCKS_LENGTH 2
|
|
#define SACK_CHUNK_NUMBER_OF_DUP_TSNS_LENGTH 2
|
|
#define SACK_CHUNK_GAP_BLOCK_LENGTH 4
|
|
#define SACK_CHUNK_GAP_BLOCK_START_LENGTH 2
|
|
#define SACK_CHUNK_GAP_BLOCK_END_LENGTH 2
|
|
#define SACK_CHUNK_DUP_TSN_LENGTH 4
|
|
|
|
#define SACK_CHUNK_CUMULATIVE_TSN_ACK_OFFSET (CHUNK_VALUE_OFFSET + 0)
|
|
#define SACK_CHUNK_ADV_REC_WINDOW_CREDIT_OFFSET (SACK_CHUNK_CUMULATIVE_TSN_ACK_OFFSET + \
|
|
SACK_CHUNK_CUMULATIVE_TSN_ACK_LENGTH)
|
|
#define SACK_CHUNK_NUMBER_OF_GAP_BLOCKS_OFFSET (SACK_CHUNK_ADV_REC_WINDOW_CREDIT_OFFSET + \
|
|
SACK_CHUNK_ADV_REC_WINDOW_CREDIT_LENGTH)
|
|
#define SACK_CHUNK_NUMBER_OF_DUP_TSNS_OFFSET (SACK_CHUNK_NUMBER_OF_GAP_BLOCKS_OFFSET + \
|
|
SACK_CHUNK_NUMBER_OF_GAP_BLOCKS_LENGTH)
|
|
#define SACK_CHUNK_GAP_BLOCK_OFFSET (SACK_CHUNK_NUMBER_OF_DUP_TSNS_OFFSET + \
|
|
SACK_CHUNK_NUMBER_OF_DUP_TSNS_LENGTH)
|
|
|
|
#define HEARTBEAT_CHUNK_INFO_OFFSET CHUNK_VALUE_OFFSET
|
|
|
|
#define SHUTDOWN_CHUNK_CUMULATIVE_TSN_ACK_OFFSET CHUNK_VALUE_OFFSET
|
|
#define SHUTDOWN_CHUNK_CUMULATIVE_TSN_ACK_LENGTH 4
|
|
|
|
#define ABORT_CHUNK_FIRST_ERROR_CAUSE_OFFSET 4
|
|
#define ERROR_CHUNK_FIRST_ERROR_CAUSE_OFFSET 4
|
|
|
|
#define COOKIE_ECHO_CHUNK_COOKIE_OFFSET CHUNK_VALUE_OFFSET
|
|
|
|
#define ECNE_CHUNK_LOWEST_TSN_OFFSET CHUNK_VALUE_OFFSET
|
|
#define ECNE_CHUNK_LOWEST_TSN_LENGTH 4
|
|
|
|
#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"
|
|
};
|
|
|
|
#define SCTP_CHECKSUM_NONE 0
|
|
#define SCTP_CHECKSUM_ADLER32 1
|
|
#define SCTP_CHECKSUM_CRC32C 2
|
|
#define SCTP_CHECKSUM_AUTOMATIC 3
|
|
|
|
static gint sctp_checksum = SCTP_CHECKSUM_ADLER32;
|
|
|
|
/* 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);
|
|
|
|
static unsigned int
|
|
sctp_adler32(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;
|
|
}
|
|
|
|
/* The CRC32C code is taken from draft-ietf-tsvwg-sctpcsum-01.txt.
|
|
* That code is copyrighted by D. Otis and has been modified.
|
|
*/
|
|
|
|
#define CRC32C(c,d) (c=(c>>8)^crc_c[(c^(d))&0xFF])
|
|
static unsigned long crc_c[256] =
|
|
{
|
|
0x00000000L, 0xF26B8303L, 0xE13B70F7L, 0x1350F3F4L,
|
|
0xC79A971FL, 0x35F1141CL, 0x26A1E7E8L, 0xD4CA64EBL,
|
|
0x8AD958CFL, 0x78B2DBCCL, 0x6BE22838L, 0x9989AB3BL,
|
|
0x4D43CFD0L, 0xBF284CD3L, 0xAC78BF27L, 0x5E133C24L,
|
|
0x105EC76FL, 0xE235446CL, 0xF165B798L, 0x030E349BL,
|
|
0xD7C45070L, 0x25AFD373L, 0x36FF2087L, 0xC494A384L,
|
|
0x9A879FA0L, 0x68EC1CA3L, 0x7BBCEF57L, 0x89D76C54L,
|
|
0x5D1D08BFL, 0xAF768BBCL, 0xBC267848L, 0x4E4DFB4BL,
|
|
0x20BD8EDEL, 0xD2D60DDDL, 0xC186FE29L, 0x33ED7D2AL,
|
|
0xE72719C1L, 0x154C9AC2L, 0x061C6936L, 0xF477EA35L,
|
|
0xAA64D611L, 0x580F5512L, 0x4B5FA6E6L, 0xB93425E5L,
|
|
0x6DFE410EL, 0x9F95C20DL, 0x8CC531F9L, 0x7EAEB2FAL,
|
|
0x30E349B1L, 0xC288CAB2L, 0xD1D83946L, 0x23B3BA45L,
|
|
0xF779DEAEL, 0x05125DADL, 0x1642AE59L, 0xE4292D5AL,
|
|
0xBA3A117EL, 0x4851927DL, 0x5B016189L, 0xA96AE28AL,
|
|
0x7DA08661L, 0x8FCB0562L, 0x9C9BF696L, 0x6EF07595L,
|
|
0x417B1DBCL, 0xB3109EBFL, 0xA0406D4BL, 0x522BEE48L,
|
|
0x86E18AA3L, 0x748A09A0L, 0x67DAFA54L, 0x95B17957L,
|
|
0xCBA24573L, 0x39C9C670L, 0x2A993584L, 0xD8F2B687L,
|
|
0x0C38D26CL, 0xFE53516FL, 0xED03A29BL, 0x1F682198L,
|
|
0x5125DAD3L, 0xA34E59D0L, 0xB01EAA24L, 0x42752927L,
|
|
0x96BF4DCCL, 0x64D4CECFL, 0x77843D3BL, 0x85EFBE38L,
|
|
0xDBFC821CL, 0x2997011FL, 0x3AC7F2EBL, 0xC8AC71E8L,
|
|
0x1C661503L, 0xEE0D9600L, 0xFD5D65F4L, 0x0F36E6F7L,
|
|
0x61C69362L, 0x93AD1061L, 0x80FDE395L, 0x72966096L,
|
|
0xA65C047DL, 0x5437877EL, 0x4767748AL, 0xB50CF789L,
|
|
0xEB1FCBADL, 0x197448AEL, 0x0A24BB5AL, 0xF84F3859L,
|
|
0x2C855CB2L, 0xDEEEDFB1L, 0xCDBE2C45L, 0x3FD5AF46L,
|
|
0x7198540DL, 0x83F3D70EL, 0x90A324FAL, 0x62C8A7F9L,
|
|
0xB602C312L, 0x44694011L, 0x5739B3E5L, 0xA55230E6L,
|
|
0xFB410CC2L, 0x092A8FC1L, 0x1A7A7C35L, 0xE811FF36L,
|
|
0x3CDB9BDDL, 0xCEB018DEL, 0xDDE0EB2AL, 0x2F8B6829L,
|
|
0x82F63B78L, 0x709DB87BL, 0x63CD4B8FL, 0x91A6C88CL,
|
|
0x456CAC67L, 0xB7072F64L, 0xA457DC90L, 0x563C5F93L,
|
|
0x082F63B7L, 0xFA44E0B4L, 0xE9141340L, 0x1B7F9043L,
|
|
0xCFB5F4A8L, 0x3DDE77ABL, 0x2E8E845FL, 0xDCE5075CL,
|
|
0x92A8FC17L, 0x60C37F14L, 0x73938CE0L, 0x81F80FE3L,
|
|
0x55326B08L, 0xA759E80BL, 0xB4091BFFL, 0x466298FCL,
|
|
0x1871A4D8L, 0xEA1A27DBL, 0xF94AD42FL, 0x0B21572CL,
|
|
0xDFEB33C7L, 0x2D80B0C4L, 0x3ED04330L, 0xCCBBC033L,
|
|
0xA24BB5A6L, 0x502036A5L, 0x4370C551L, 0xB11B4652L,
|
|
0x65D122B9L, 0x97BAA1BAL, 0x84EA524EL, 0x7681D14DL,
|
|
0x2892ED69L, 0xDAF96E6AL, 0xC9A99D9EL, 0x3BC21E9DL,
|
|
0xEF087A76L, 0x1D63F975L, 0x0E330A81L, 0xFC588982L,
|
|
0xB21572C9L, 0x407EF1CAL, 0x532E023EL, 0xA145813DL,
|
|
0x758FE5D6L, 0x87E466D5L, 0x94B49521L, 0x66DF1622L,
|
|
0x38CC2A06L, 0xCAA7A905L, 0xD9F75AF1L, 0x2B9CD9F2L,
|
|
0xFF56BD19L, 0x0D3D3E1AL, 0x1E6DCDEEL, 0xEC064EEDL,
|
|
0xC38D26C4L, 0x31E6A5C7L, 0x22B65633L, 0xD0DDD530L,
|
|
0x0417B1DBL, 0xF67C32D8L, 0xE52CC12CL, 0x1747422FL,
|
|
0x49547E0BL, 0xBB3FFD08L, 0xA86F0EFCL, 0x5A048DFFL,
|
|
0x8ECEE914L, 0x7CA56A17L, 0x6FF599E3L, 0x9D9E1AE0L,
|
|
0xD3D3E1ABL, 0x21B862A8L, 0x32E8915CL, 0xC083125FL,
|
|
0x144976B4L, 0xE622F5B7L, 0xF5720643L, 0x07198540L,
|
|
0x590AB964L, 0xAB613A67L, 0xB831C993L, 0x4A5A4A90L,
|
|
0x9E902E7BL, 0x6CFBAD78L, 0x7FAB5E8CL, 0x8DC0DD8FL,
|
|
0xE330A81AL, 0x115B2B19L, 0x020BD8EDL, 0xF0605BEEL,
|
|
0x24AA3F05L, 0xD6C1BC06L, 0xC5914FF2L, 0x37FACCF1L,
|
|
0x69E9F0D5L, 0x9B8273D6L, 0x88D28022L, 0x7AB90321L,
|
|
0xAE7367CAL, 0x5C18E4C9L, 0x4F48173DL, 0xBD23943EL,
|
|
0xF36E6F75L, 0x0105EC76L, 0x12551F82L, 0xE03E9C81L,
|
|
0x34F4F86AL, 0xC69F7B69L, 0xD5CF889DL, 0x27A40B9EL,
|
|
0x79B737BAL, 0x8BDCB4B9L, 0x988C474DL, 0x6AE7C44EL,
|
|
0xBE2DA0A5L, 0x4C4623A6L, 0x5F16D052L, 0xAD7D5351L,
|
|
};
|
|
|
|
static unsigned int
|
|
sctp_crc32c(const unsigned char* buf, unsigned int len)
|
|
{
|
|
unsigned int i;
|
|
unsigned long crc32 = ~0L;
|
|
unsigned long result;
|
|
unsigned char byte0,byte1,byte2,byte3;
|
|
|
|
for (i = 0; i < SOURCE_PORT_LENGTH + DESTINATION_PORT_LENGTH + VERIFICATION_TAG_LENGTH; i++)
|
|
{
|
|
CRC32C(crc32, buf[i]);
|
|
}
|
|
CRC32C(crc32, 0);
|
|
CRC32C(crc32, 0);
|
|
CRC32C(crc32, 0);
|
|
CRC32C(crc32, 0);
|
|
for (i = COMMON_HEADER_LENGTH; i < len; i++)
|
|
{
|
|
CRC32C(crc32, buf[i]);
|
|
}
|
|
result = ~crc32;
|
|
|
|
byte0 = result & 0xff;
|
|
byte1 = (result>>8) & 0xff;
|
|
byte2 = (result>>16) & 0xff;
|
|
byte3 = (result>>24) & 0xff;
|
|
crc32 = ((byte0 << 24) | (byte1 << 16) | (byte2 << 8) | byte3);
|
|
return ( crc32 );
|
|
}
|
|
|
|
static 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
|
|
*/
|
|
|
|
static void
|
|
dissect_parameter(tvbuff_t *, packet_info *, proto_tree *);
|
|
|
|
static void
|
|
dissect_error_cause(tvbuff_t *, packet_info *, proto_tree *);
|
|
|
|
static gboolean
|
|
dissect_sctp_chunk(tvbuff_t *, packet_info *, proto_tree *, proto_tree *);
|
|
|
|
static void
|
|
dissect_tlv_parameter_list(tvbuff_t *parameter_list_tvb, packet_info *pinfo, proto_tree *tree)
|
|
{
|
|
guint offset, length, padding_length, total_length;
|
|
tvbuff_t *parameter_tvb;
|
|
|
|
offset = 0;
|
|
while(tvb_reported_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, pinfo, tree);
|
|
/* get rid of the handled parameter */
|
|
offset += total_length;
|
|
}
|
|
}
|
|
|
|
static 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"));
|
|
}
|
|
|
|
static 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");
|
|
}
|
|
|
|
static 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");
|
|
}
|
|
|
|
static 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"));
|
|
}
|
|
|
|
static void
|
|
dissect_unrecognized_parameters_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *parameter_tree, proto_item *parameter_item)
|
|
{
|
|
guint16 length, padding_length, parameter_value_length, unrecognized_parameter_type;
|
|
tvbuff_t *unrecognized_parameters_tvb;
|
|
|
|
length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
|
|
padding_length = nr_of_padding_bytes(length);
|
|
|
|
parameter_value_length = length - PARAMETER_HEADER_LENGTH + padding_length;
|
|
|
|
unrecognized_parameters_tvb = tvb_new_subset(parameter_tvb, PARAMETER_VALUE_OFFSET,
|
|
parameter_value_length, parameter_value_length);
|
|
unrecognized_parameter_type = tvb_get_ntohs(unrecognized_parameters_tvb, PARAMETER_TYPE_OFFSET);
|
|
dissect_tlv_parameter_list(unrecognized_parameters_tvb, pinfo, parameter_tree);
|
|
|
|
proto_item_set_text(parameter_item, "Unrecognized parameter of type %s (0x%x)",
|
|
val_to_str(unrecognized_parameter_type, sctp_parameter_identifier_values, "unknown"), unrecognized_parameter_type);
|
|
}
|
|
|
|
static 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);
|
|
}
|
|
|
|
static 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");
|
|
}
|
|
|
|
static 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: 0x%04x (%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"));
|
|
}
|
|
|
|
static void
|
|
dissect_ecn_parameter(proto_item *parameter_item)
|
|
{
|
|
proto_item_set_text(parameter_item, "ECN parameter");
|
|
}
|
|
|
|
#define USTREAMS_START_LENGTH 2
|
|
#define USTREAMS_END_LENGTH 2
|
|
#define USTREAMS_INTERVAL_LENGTH (USTREAMS_START_LENGTH + USTREAMS_END_LENGTH)
|
|
|
|
static void
|
|
dissect_unreliable_streams_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
|
|
{
|
|
guint16 length, start, end, number_of_intervals, interval_number;
|
|
proto_item *interval_item;
|
|
proto_tree *interval_tree;
|
|
gint interval_offset;
|
|
|
|
length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
|
|
number_of_intervals = (length - PARAMETER_HEADER_LENGTH) / USTREAMS_INTERVAL_LENGTH;
|
|
|
|
interval_offset = PARAMETER_VALUE_OFFSET;
|
|
for(interval_number = 1; interval_number <= number_of_intervals; interval_number++) {
|
|
start = tvb_get_ntohs(parameter_tvb, interval_offset);
|
|
end = tvb_get_ntohs(parameter_tvb, interval_offset + USTREAMS_START_LENGTH);
|
|
interval_item = proto_tree_add_text(parameter_tree, parameter_tvb, interval_offset, USTREAMS_INTERVAL_LENGTH, "Unreliable streams (%u-%u)", start, end);
|
|
interval_tree = proto_item_add_subtree(interval_item, ett_sctp_unreliable_streams_interval);
|
|
proto_tree_add_uint(interval_tree, hf_sctp_ustreams_start, parameter_tvb, interval_offset, USTREAMS_START_LENGTH, start);
|
|
proto_tree_add_uint(interval_tree, hf_sctp_ustreams_end, parameter_tvb, interval_offset + USTREAMS_START_LENGTH, USTREAMS_END_LENGTH, end);
|
|
interval_offset += USTREAMS_INTERVAL_LENGTH;
|
|
};
|
|
proto_item_set_text(parameter_item, "Unreliable streams parameter");
|
|
}
|
|
|
|
static void
|
|
dissect_add_ip_address_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *parameter_tree, proto_item *parameter_item)
|
|
{
|
|
guint16 length, parameter_value_length;
|
|
tvbuff_t *address_tvb;
|
|
|
|
length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
|
|
parameter_value_length = length - PARAMETER_HEADER_LENGTH;
|
|
|
|
address_tvb = tvb_new_subset(parameter_tvb, PARAMETER_VALUE_OFFSET, parameter_value_length, parameter_value_length);
|
|
dissect_parameter(address_tvb, pinfo, parameter_tree);
|
|
|
|
proto_item_set_text(parameter_item, "Add IP address parameter");
|
|
}
|
|
|
|
static void
|
|
dissect_del_ip_address_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *parameter_tree, proto_item *parameter_item)
|
|
{
|
|
guint16 length, parameter_value_length;
|
|
tvbuff_t *address_tvb;
|
|
|
|
length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
|
|
parameter_value_length = length - PARAMETER_HEADER_LENGTH;
|
|
|
|
address_tvb = tvb_new_subset(parameter_tvb, PARAMETER_VALUE_OFFSET, parameter_value_length, parameter_value_length);
|
|
dissect_parameter(address_tvb, pinfo, parameter_tree);
|
|
|
|
proto_item_set_text(parameter_item, "Delete IP address parameter");
|
|
}
|
|
|
|
static void
|
|
dissect_error_cause_indication_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *parameter_tree, proto_item *parameter_item)
|
|
{
|
|
guint16 length, padding_length, total_length;
|
|
gint offset;
|
|
tvbuff_t *error_cause_tvb;
|
|
|
|
offset = PARAMETER_VALUE_OFFSET;
|
|
while(tvb_reported_length_remaining(parameter_tvb, offset)) {
|
|
length = tvb_get_ntohs(parameter_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 */
|
|
error_cause_tvb = tvb_new_subset(parameter_tvb, offset , total_length, total_length);
|
|
dissect_error_cause(error_cause_tvb, pinfo, parameter_tree);
|
|
/* get rid of the handled parameter */
|
|
offset += total_length;
|
|
}
|
|
proto_item_set_text(parameter_item, "Error cause indication");
|
|
}
|
|
|
|
static void
|
|
dissect_set_primary_address_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *parameter_tree, proto_item *parameter_item)
|
|
{
|
|
guint16 length, parameter_value_length;
|
|
tvbuff_t *address_tvb;
|
|
|
|
length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
|
|
parameter_value_length = length - PARAMETER_HEADER_LENGTH;
|
|
|
|
address_tvb = tvb_new_subset(parameter_tvb, PARAMETER_VALUE_OFFSET, parameter_value_length, parameter_value_length);
|
|
dissect_parameter(address_tvb, pinfo, parameter_tree);
|
|
|
|
proto_item_set_text(parameter_item, "Set primary address parameter");
|
|
}
|
|
|
|
static void
|
|
dissect_success_report_parameter(proto_item *parameter_item)
|
|
{
|
|
proto_item_set_text(parameter_item, "Success report parameter");
|
|
}
|
|
|
|
#define ADAP_INDICATION_LENGTH 4
|
|
#define ADAP_INDICATION_OFFSET PARAMETER_VALUE_OFFSET
|
|
|
|
static void
|
|
dissect_adap_indication_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
|
|
{
|
|
guint32 indication;
|
|
|
|
indication = tvb_get_ntohl(parameter_tvb, ADAP_INDICATION_OFFSET);
|
|
proto_tree_add_uint(parameter_tree, hf_sctp_adap_indication, parameter_tvb, ADAP_INDICATION_OFFSET, ADAP_INDICATION_LENGTH, indication);
|
|
proto_item_set_text(parameter_item, "Adaptation layer indication");
|
|
}
|
|
|
|
static 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"));
|
|
}
|
|
|
|
static void
|
|
dissect_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, 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_text(chunk_tree, parameter_tvb,
|
|
PARAMETER_HEADER_OFFSET, total_length, "%s parameter",
|
|
val_to_str(type, sctp_parameter_identifier_values, "Unknown"));
|
|
parameter_tree = proto_item_add_subtree(parameter_item, ett_sctp_chunk_parameter);
|
|
|
|
proto_tree_add_uint(parameter_tree, hf_sctp_chunk_parameter_type,
|
|
parameter_tvb, PARAMETER_TYPE_OFFSET, PARAMETER_TYPE_LENGTH,
|
|
type);
|
|
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, pinfo, 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_item);
|
|
break;
|
|
case UNRELIABLE_STREAMS_PARAMETER_ID:
|
|
dissect_unreliable_streams_parameter(parameter_tvb, parameter_tree, parameter_item);
|
|
break;
|
|
case ADD_IP_ADDRESS_PARAMETER_ID:
|
|
dissect_add_ip_address_parameter(parameter_tvb, pinfo, parameter_tree, parameter_item);
|
|
break;
|
|
case DEL_IP_ADDRESS_PARAMETER_ID:
|
|
dissect_del_ip_address_parameter(parameter_tvb, pinfo, parameter_tree, parameter_item);
|
|
break;
|
|
case ERROR_CAUSE_INDICATION_PARAMETER_ID:
|
|
dissect_error_cause_indication_parameter(parameter_tvb, pinfo, parameter_tree, parameter_item);
|
|
break;
|
|
case SET_PRIMARY_ADDRESS_PARAMETER_ID:
|
|
dissect_set_primary_address_parameter(parameter_tvb, pinfo, parameter_tree, parameter_item);
|
|
break;
|
|
case SUCCESS_REPORT_PARAMETER_ID:
|
|
dissect_success_report_parameter(parameter_item);
|
|
break;
|
|
case ADAP_LAYER_INDICATION_PARAMETER_ID:
|
|
dissect_adap_indication_parameter(parameter_tvb, parameter_tree, parameter_item);
|
|
break;
|
|
default:
|
|
dissect_unknown_parameter(parameter_tvb, parameter_tree, parameter_item);
|
|
break;
|
|
};
|
|
if ((padding_length > 0) && (type != UNREC_PARA_PARAMETER_ID))
|
|
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
|
|
*/
|
|
static 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);
|
|
}
|
|
|
|
static 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(cause_tree, hf_sctp_cause_missing_parameter_type,
|
|
cause_tvb, offset, CAUSE_MISSING_PARAMETER_TYPE_LENGTH,
|
|
parameter_type);
|
|
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") );
|
|
}
|
|
|
|
static 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);
|
|
}
|
|
|
|
static void
|
|
dissect_out_of_resource_cause(proto_item *cause_item)
|
|
{
|
|
proto_item_set_text(cause_item, "Error cause reporting lack of resources");
|
|
}
|
|
|
|
static void
|
|
dissect_unresolvable_address_cause(tvbuff_t *cause_tvb, packet_info *pinfo, 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, pinfo, 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 0x%04x (%s)",
|
|
parameter_type, val_to_str(parameter_type, sctp_parameter_identifier_values, "unknown") );
|
|
}
|
|
|
|
static 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"));
|
|
}
|
|
|
|
static void
|
|
dissect_invalid_mandatory_parameter_cause(proto_item *cause_item)
|
|
{
|
|
proto_item_set_text(cause_item, "Error cause reporting an invalid mandatory parameter");
|
|
}
|
|
|
|
static void
|
|
dissect_unrecognized_parameters_cause(tvbuff_t *cause_tvb, packet_info *pinfo, proto_tree *cause_tree, proto_item *cause_item)
|
|
{
|
|
guint16 length, padding_length, cause_info_length;
|
|
tvbuff_t *unrecognized_parameters_tvb;
|
|
|
|
length = tvb_get_ntohs(cause_tvb, CAUSE_LENGTH_OFFSET);
|
|
padding_length = nr_of_padding_bytes(length);
|
|
cause_info_length = length - CAUSE_HEADER_LENGTH + padding_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, pinfo, cause_tree);
|
|
|
|
proto_item_set_text(cause_item, "Error cause reporting unrecognized parameters");
|
|
}
|
|
|
|
static 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);
|
|
}
|
|
|
|
static void
|
|
dissect_cookie_received_while_shutting_down_cause(proto_item *cause_item)
|
|
{
|
|
proto_item_set_text(cause_item, "Error cause reporting cookie reception while shutting down");
|
|
}
|
|
|
|
static void
|
|
dissect_delete_last_address_cause(tvbuff_t *cause_tvb, packet_info *pinfo, proto_tree *cause_tree, proto_item *cause_item)
|
|
{
|
|
guint16 length, cause_info_length;
|
|
tvbuff_t *parameter_tvb;
|
|
|
|
length = tvb_get_ntohs(cause_tvb, CAUSE_LENGTH_OFFSET);
|
|
cause_info_length = length - CAUSE_HEADER_LENGTH;
|
|
parameter_tvb = tvb_new_subset(cause_tvb, CAUSE_INFO_OFFSET, cause_info_length, cause_info_length);
|
|
dissect_parameter(parameter_tvb, pinfo, cause_tree);
|
|
proto_item_set_text(cause_item, "Delete last address cause");
|
|
}
|
|
|
|
static void
|
|
dissect_resource_outage_cause(tvbuff_t *cause_tvb, packet_info *pinfo, proto_tree *cause_tree, proto_item *cause_item)
|
|
{
|
|
guint16 length, cause_info_length;
|
|
tvbuff_t *parameter_tvb;
|
|
|
|
length = tvb_get_ntohs(cause_tvb, CAUSE_LENGTH_OFFSET);
|
|
cause_info_length = length - CAUSE_HEADER_LENGTH;
|
|
parameter_tvb = tvb_new_subset(cause_tvb, CAUSE_INFO_OFFSET, cause_info_length, cause_info_length);
|
|
dissect_parameter(parameter_tvb, pinfo, cause_tree);
|
|
proto_item_set_text(cause_item, "Operation refused due to resource shortage");
|
|
}
|
|
|
|
static void
|
|
dissect_delete_source_address_cause(tvbuff_t *cause_tvb, packet_info *pinfo, proto_tree *cause_tree, proto_item *cause_item)
|
|
{
|
|
guint16 length, cause_info_length;
|
|
tvbuff_t *parameter_tvb;
|
|
|
|
length = tvb_get_ntohs(cause_tvb, CAUSE_LENGTH_OFFSET);
|
|
cause_info_length = length - CAUSE_HEADER_LENGTH;
|
|
parameter_tvb = tvb_new_subset(cause_tvb, CAUSE_INFO_OFFSET, cause_info_length, cause_info_length);
|
|
dissect_parameter(parameter_tvb, pinfo, cause_tree);
|
|
proto_item_set_text(cause_item, "Delete source address cause");
|
|
}
|
|
|
|
static 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"));
|
|
}
|
|
|
|
static 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_text(chunk_tree, cause_tvb,
|
|
CAUSE_HEADER_OFFSET, total_length,
|
|
"BAD ERROR CAUSE");
|
|
cause_tree = proto_item_add_subtree(cause_item, ett_sctp_chunk_cause);
|
|
|
|
proto_tree_add_uint(cause_tree, hf_sctp_cause_code,
|
|
cause_tvb, CAUSE_CODE_OFFSET, CAUSE_CODE_LENGTH,
|
|
code);
|
|
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_item);
|
|
break;
|
|
case UNRESOLVABLE_ADDRESS:
|
|
dissect_unresolvable_address_cause(cause_tvb, pinfo, 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_item);
|
|
break;
|
|
case UNRECOGNIZED_PARAMETERS:
|
|
dissect_unrecognized_parameters_cause(cause_tvb, pinfo, 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_item);
|
|
break;
|
|
case REQUEST_TO_DELETE_LAST_ADDRESS:
|
|
dissect_delete_last_address_cause(cause_tvb, pinfo, cause_tree, cause_item);
|
|
break;
|
|
case OPERATION_REFUSED_DUE_TO_RESOURCE_SHORTAGE:
|
|
dissect_resource_outage_cause(cause_tvb, pinfo, cause_tree, cause_item);
|
|
break;
|
|
case REQUEST_TO_DELETE_SOURCE_ADDRESS:
|
|
dissect_delete_source_address_cause(cause_tvb, pinfo, cause_tree, cause_item);
|
|
break;
|
|
default:
|
|
dissect_unknown_cause(cause_tvb, cause_tree, cause_item);
|
|
break;
|
|
};
|
|
if ((padding_length > 0) && (code != UNRECOGNIZED_PARAMETERS))
|
|
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 gboolean
|
|
dissect_payload(tvbuff_t *payload_tvb, packet_info *pinfo, proto_tree *tree,
|
|
proto_tree *chunk_tree, guint32 ppi, guint16 payload_length, guint16 padding_length)
|
|
{
|
|
/* do lookup with the subdissector table */
|
|
if (dissector_try_port (sctp_ppi_dissector_table, ppi, payload_tvb, pinfo, tree) ||
|
|
dissector_try_port(sctp_port_dissector_table, pinfo->srcport, payload_tvb, pinfo, tree) ||
|
|
dissector_try_port(sctp_port_dissector_table, pinfo->destport, payload_tvb, pinfo, tree)){
|
|
return TRUE;
|
|
}
|
|
else {
|
|
if (check_col(pinfo->cinfo, COL_INFO))
|
|
col_append_str(pinfo->cinfo, COL_INFO, "DATA ");
|
|
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"));
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
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;
|
|
|
|
length = tvb_get_ntohs(chunk_tvb, CHUNK_LENGTH_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);
|
|
payload_proto_id = tvb_get_ntohl(chunk_tvb, DATA_CHUNK_PAYLOAD_PROTOCOL_ID_OFFSET);
|
|
|
|
if (chunk_tree) {
|
|
flags = tvb_get_guint8(chunk_tvb, CHUNK_FLAGS_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);
|
|
|
|
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"));
|
|
};
|
|
return dissect_payload(payload_tvb, pinfo, tree, chunk_tree, payload_proto_id, payload_length, padding_length);
|
|
}
|
|
|
|
static void
|
|
dissect_init_chunk(tvbuff_t *chunk_tvb, packet_info *pinfo,
|
|
proto_tree *chunk_tree, proto_item *chunk_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);
|
|
|
|
if (check_col(pinfo->cinfo, COL_INFO)) {
|
|
if (type == SCTP_INIT_CHUNK_ID) {
|
|
col_append_str(pinfo->cinfo, COL_INFO, "INIT ");
|
|
} else {
|
|
col_append_str(pinfo->cinfo, COL_INFO, "INIT_ACK ");
|
|
};
|
|
};
|
|
|
|
if (chunk_tree) {
|
|
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, pinfo, 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"));
|
|
}
|
|
}
|
|
|
|
static void
|
|
dissect_init_ack_chunk(tvbuff_t *chunk_tvb, packet_info *pinfo,
|
|
proto_tree *chunk_tree, proto_item *chunk_item)
|
|
{
|
|
dissect_init_chunk(chunk_tvb, pinfo, chunk_tree, chunk_item);
|
|
}
|
|
|
|
static void
|
|
dissect_sack_chunk(tvbuff_t *chunk_tvb, packet_info *pinfo,
|
|
proto_tree *chunk_tree, proto_item *chunk_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;
|
|
|
|
if (check_col(pinfo->cinfo, COL_INFO))
|
|
col_append_str(pinfo->cinfo, COL_INFO, "SACK ");
|
|
|
|
if (chunk_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"));
|
|
}
|
|
}
|
|
|
|
static void
|
|
dissect_heartbeat_chunk(tvbuff_t *chunk_tvb, packet_info *pinfo,
|
|
proto_tree *chunk_tree, proto_item *chunk_item)
|
|
{
|
|
tvbuff_t *parameter_tvb;
|
|
guint chunk_length, info_length, padding_length, total_length;
|
|
|
|
if (check_col(pinfo->cinfo, COL_INFO))
|
|
col_append_str(pinfo->cinfo, COL_INFO, "HEARTBEAT ");
|
|
|
|
if (chunk_tree) {
|
|
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, pinfo, chunk_tree);
|
|
|
|
proto_item_set_text(chunk_item, "HEARTBEAT chunk");
|
|
}
|
|
}
|
|
|
|
static void
|
|
dissect_heartbeat_ack_chunk(tvbuff_t *chunk_tvb, packet_info *pinfo,
|
|
proto_tree *chunk_tree, proto_item *chunk_item)
|
|
{
|
|
tvbuff_t *parameter_tvb;
|
|
guint chunk_length, info_length, padding_length, total_length;
|
|
|
|
if (check_col(pinfo->cinfo, COL_INFO))
|
|
col_append_str(pinfo->cinfo, COL_INFO, "HEARTBEAT_ACK ");
|
|
|
|
if (chunk_tree) {
|
|
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, pinfo, chunk_tree);
|
|
|
|
proto_item_set_text(chunk_item, "HEARTBEAT ACK chunk");
|
|
}
|
|
}
|
|
|
|
static void
|
|
dissect_abort_chunk(tvbuff_t *chunk_tvb, packet_info *pinfo, proto_tree *chunk_tree, proto_item *chunk_item, proto_item *flags_item)
|
|
{
|
|
guint8 flags;
|
|
guint offset, number_of_causes;
|
|
guint16 length, padding_length, total_length;
|
|
tvbuff_t *cause_tvb;
|
|
proto_tree *flag_tree;
|
|
if (check_col(pinfo->cinfo, COL_INFO))
|
|
col_append_str(pinfo->cinfo, COL_INFO, "ABORT ");
|
|
|
|
if (chunk_tree) {
|
|
flags = tvb_get_guint8(chunk_tvb, CHUNK_FLAGS_OFFSET);
|
|
flag_tree = proto_item_add_subtree(flags_item, ett_sctp_abort_chunk_flags);
|
|
proto_tree_add_boolean(flag_tree, hf_sctp_abort_chunk_t_bit, chunk_tvb, CHUNK_FLAGS_OFFSET, CHUNK_FLAGS_LENGTH, flags);
|
|
|
|
number_of_causes = 0;
|
|
offset = ABORT_CHUNK_FIRST_ERROR_CAUSE_OFFSET;
|
|
while(tvb_reported_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"));
|
|
}
|
|
}
|
|
|
|
static void
|
|
dissect_shutdown_chunk(tvbuff_t *chunk_tvb, packet_info *pinfo,
|
|
proto_tree *chunk_tree, proto_item *chunk_item)
|
|
{
|
|
guint32 cumulative_tsn_ack;
|
|
|
|
if (check_col(pinfo->cinfo, COL_INFO))
|
|
col_append_str(pinfo->cinfo, COL_INFO, "SHUTDOWN ");
|
|
|
|
if (chunk_tree) {
|
|
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);
|
|
}
|
|
}
|
|
|
|
static void
|
|
dissect_shutdown_ack_chunk(packet_info *pinfo,
|
|
proto_tree *chunk_tree, proto_item *chunk_item)
|
|
{
|
|
if (check_col(pinfo->cinfo, COL_INFO))
|
|
col_append_str(pinfo->cinfo, COL_INFO, "SHUTDOWN_ACK ");
|
|
|
|
if (chunk_tree) {
|
|
proto_item_set_text(chunk_item, "SHUTDOWN ACK chunk");
|
|
}
|
|
}
|
|
|
|
static void
|
|
dissect_error_chunk(tvbuff_t *chunk_tvb, packet_info *pinfo,
|
|
proto_tree *chunk_tree, proto_item *chunk_item)
|
|
{
|
|
guint offset, number_of_causes;
|
|
guint16 length, padding_length, total_length;
|
|
tvbuff_t *cause_tvb;
|
|
|
|
if (check_col(pinfo->cinfo, COL_INFO))
|
|
col_append_str(pinfo->cinfo, COL_INFO, "ERROR ");
|
|
|
|
if (chunk_tree) {
|
|
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_reported_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"));
|
|
}
|
|
}
|
|
|
|
static void
|
|
dissect_cookie_echo_chunk(tvbuff_t *chunk_tvb, packet_info *pinfo,
|
|
proto_tree *chunk_tree, proto_item *chunk_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;
|
|
|
|
if (check_col(pinfo->cinfo, COL_INFO))
|
|
col_append_str(pinfo->cinfo, COL_INFO, "COOKIE_ECHO ");
|
|
|
|
if (chunk_tree) {
|
|
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"));
|
|
}
|
|
}
|
|
|
|
static void
|
|
dissect_cookie_ack_chunk(packet_info *pinfo,
|
|
proto_tree *chunk_tree, proto_item *chunk_item)
|
|
{
|
|
if (check_col(pinfo->cinfo, COL_INFO))
|
|
col_append_str(pinfo->cinfo, COL_INFO, "COOKIE_ACK ");
|
|
|
|
if (chunk_tree) {
|
|
proto_item_set_text(chunk_item, "COOKIE ACK chunk");
|
|
}
|
|
}
|
|
|
|
static void
|
|
dissect_ecne_chunk(tvbuff_t *chunk_tvb, packet_info *pinfo,
|
|
proto_tree *chunk_tree, proto_item *chunk_item)
|
|
{
|
|
guint32 lowest_tsn;
|
|
|
|
if (check_col(pinfo->cinfo, COL_INFO))
|
|
col_append_str(pinfo->cinfo, COL_INFO, "ECNE ");
|
|
|
|
if (chunk_tree) {
|
|
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");
|
|
}
|
|
}
|
|
|
|
static void
|
|
dissect_cwr_chunk(tvbuff_t *chunk_tvb, packet_info *pinfo,
|
|
proto_tree *chunk_tree, proto_item *chunk_item)
|
|
{
|
|
guint32 lowest_tsn;
|
|
|
|
if (check_col(pinfo->cinfo, COL_INFO))
|
|
col_append_str(pinfo->cinfo, COL_INFO, "CWR ");
|
|
|
|
if (chunk_tree) {
|
|
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");
|
|
}
|
|
}
|
|
|
|
static void
|
|
dissect_shutdown_complete_chunk(tvbuff_t *chunk_tvb, packet_info *pinfo,
|
|
proto_tree *chunk_tree, proto_item *chunk_item, proto_item *flags_item)
|
|
{
|
|
guint8 flags;
|
|
guint16 length;
|
|
proto_tree *flag_tree;
|
|
|
|
if (check_col(pinfo->cinfo, COL_INFO))
|
|
col_append_str(pinfo->cinfo, COL_INFO, "SHUTDOWN_COMPLETE ");
|
|
|
|
if (chunk_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_shutdown_complete_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");
|
|
}
|
|
}
|
|
|
|
#define FORWARD_TSN_CHUNK_TSN_OFFSET CHUNK_VALUE_OFFSET
|
|
#define FORWARD_TSN_CHUNK_TSN_LENGTH 4
|
|
|
|
static void
|
|
dissect_forward_tsn_chunk(tvbuff_t *chunk_tvb, packet_info *pinfo, proto_tree *chunk_tree, proto_item *chunk_item)
|
|
{
|
|
guint32 tsn;
|
|
|
|
if (check_col(pinfo->cinfo, COL_INFO))
|
|
col_append_str(pinfo->cinfo, COL_INFO, "FORWARD TSN ");
|
|
|
|
if (chunk_tree) {
|
|
tsn = tvb_get_ntohl(chunk_tvb, FORWARD_TSN_CHUNK_TSN_OFFSET);
|
|
proto_tree_add_uint(chunk_tree, hf_sctp_forward_tsn_chunk_tsn, chunk_tvb, FORWARD_TSN_CHUNK_TSN_OFFSET, FORWARD_TSN_CHUNK_TSN_LENGTH, tsn);
|
|
proto_item_set_text(chunk_item, "FORWARD TSN chunk (new cumulative TSN %u)", tsn);
|
|
}
|
|
}
|
|
|
|
#define SERIAL_NUMBER_LENGTH 4
|
|
#define CORRELATION_ID_LENGTH 4
|
|
#define ASCONF_RESERVED_LENGTH 3
|
|
#define ASCONF_ADDR_TYPE_LENGTH 1
|
|
#define ASCONF_ADDR_LENGTH 16
|
|
#define SERIAL_NUMBER_OFFSET PARAMETER_VALUE_OFFSET
|
|
|
|
#define IP_V4_ADDRESS_TYPE 5
|
|
#define IP_V6_ADDRESS_TYPE 6
|
|
|
|
static const value_string sctp_address_type_values[] = {
|
|
{ IP_V4_ADDRESS_TYPE, "IP V4 address" },
|
|
{ IP_V6_ADDRESS_TYPE, "IP V6 address" },
|
|
{ 0, NULL } };
|
|
|
|
static void
|
|
dissect_asconf_chunk(tvbuff_t *chunk_tvb, packet_info *pinfo, proto_tree *chunk_tree, proto_item *chunk_item)
|
|
{
|
|
guint32 serial_number, correlation_id, ipv4_address;
|
|
guint offset, length, padding_length, total_length;
|
|
guint8 addr_type;
|
|
tvbuff_t *parameter_tvb;
|
|
|
|
if (check_col(pinfo->cinfo, COL_INFO))
|
|
col_append_str(pinfo->cinfo, COL_INFO, "ASCONF ");
|
|
|
|
if (chunk_tree) {
|
|
offset = SERIAL_NUMBER_OFFSET;
|
|
serial_number = tvb_get_ntohl(chunk_tvb, offset);
|
|
proto_tree_add_uint(chunk_tree, hf_sctp_asconf_serial, chunk_tvb, offset, SERIAL_NUMBER_LENGTH, serial_number);
|
|
offset += SERIAL_NUMBER_LENGTH;
|
|
proto_tree_add_bytes(chunk_tree, hf_sctp_asconf_reserved, chunk_tvb, offset, ASCONF_RESERVED_LENGTH, tvb_get_ptr(chunk_tvb, offset, ASCONF_RESERVED_LENGTH));
|
|
offset += ASCONF_RESERVED_LENGTH;
|
|
addr_type = tvb_get_guint8(chunk_tvb, offset);
|
|
proto_tree_add_uint(chunk_tree, hf_sctp_asconf_addr_type, chunk_tvb, offset, ASCONF_ADDR_TYPE_LENGTH, addr_type);
|
|
offset += ASCONF_ADDR_TYPE_LENGTH;
|
|
switch (addr_type) {
|
|
case IP_V4_ADDRESS_TYPE:
|
|
tvb_memcpy(chunk_tvb, (guint8 *)&ipv4_address, offset, IPV4_ADDRESS_LENGTH);
|
|
proto_tree_add_ipv4(chunk_tree, hf_sctp_asconf_ipv4_address, chunk_tvb, offset, IPV4_ADDRESS_LENGTH, ipv4_address);
|
|
proto_tree_add_bytes(chunk_tree, hf_sctp_asconf_addr, chunk_tvb, offset + IPV4_ADDRESS_LENGTH, ASCONF_ADDR_LENGTH - IPV4_ADDRESS_LENGTH,
|
|
tvb_get_ptr(chunk_tvb, offset + IPV4_ADDRESS_LENGTH, ASCONF_ADDR_LENGTH - IPV4_ADDRESS_LENGTH));
|
|
break;
|
|
case IP_V6_ADDRESS_TYPE:
|
|
proto_tree_add_ipv6(chunk_tree, hf_sctp_asconf_ipv6_address, chunk_tvb, offset, IPV6_ADDRESS_LENGTH,
|
|
tvb_get_ptr(chunk_tvb, offset, IPV6_ADDRESS_LENGTH));
|
|
break;
|
|
default:
|
|
proto_tree_add_bytes(chunk_tree, hf_sctp_asconf_addr, chunk_tvb, offset, ASCONF_ADDR_LENGTH, tvb_get_ptr(chunk_tvb, offset, ASCONF_ADDR_LENGTH));
|
|
break;
|
|
}
|
|
offset += ASCONF_ADDR_LENGTH;
|
|
proto_item_set_text(chunk_item, "ASCONF chunk");
|
|
|
|
while(tvb_reported_length_remaining(chunk_tvb, offset)) {
|
|
correlation_id = tvb_get_ntohl(chunk_tvb, offset);
|
|
proto_tree_add_uint(chunk_tree, hf_sctp_asconf_correlation_id, chunk_tvb, offset, CORRELATION_ID_LENGTH, correlation_id);
|
|
offset += CORRELATION_ID_LENGTH;
|
|
length = tvb_get_ntohs(chunk_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(chunk_tvb, offset, total_length, total_length);
|
|
dissect_parameter(parameter_tvb, pinfo, chunk_tree);
|
|
/* get rid of the handled parameter */
|
|
offset += total_length;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
dissect_asconf_ack_chunk(tvbuff_t *chunk_tvb, packet_info *pinfo, proto_tree *chunk_tree, proto_item *chunk_item)
|
|
{
|
|
guint32 serial_number, correlation_id;
|
|
guint offset, length, padding_length, total_length;
|
|
tvbuff_t *parameter_tvb;
|
|
|
|
if (check_col(pinfo->cinfo, COL_INFO))
|
|
col_append_str(pinfo->cinfo, COL_INFO, "ASCONF-ACK ");
|
|
|
|
if (chunk_tree) {
|
|
serial_number = tvb_get_ntohl(chunk_tvb, SERIAL_NUMBER_OFFSET);
|
|
proto_tree_add_uint(chunk_tree, hf_sctp_asconf_ack_serial, chunk_tvb, SERIAL_NUMBER_OFFSET, SERIAL_NUMBER_LENGTH, serial_number);
|
|
proto_item_set_text(chunk_item, "ASCONF-ACK chunk");
|
|
|
|
offset = SERIAL_NUMBER_OFFSET + SERIAL_NUMBER_LENGTH;
|
|
while(tvb_reported_length_remaining(chunk_tvb, offset)) {
|
|
correlation_id = tvb_get_ntohl(chunk_tvb, offset);
|
|
proto_tree_add_uint(chunk_tree, hf_sctp_asconf_ack_correlation_id, chunk_tvb, offset, CORRELATION_ID_LENGTH, correlation_id);
|
|
offset += CORRELATION_ID_LENGTH;
|
|
length = tvb_get_ntohs(chunk_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(chunk_tvb, offset, total_length, total_length);
|
|
dissect_parameter(parameter_tvb, pinfo, chunk_tree);
|
|
/* get rid of the handled parameter */
|
|
offset += total_length;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
dissect_unknown_chunk(tvbuff_t *chunk_tvb, packet_info *pinfo,
|
|
proto_tree *chunk_tree, proto_item *chunk_item)
|
|
{
|
|
guint length, chunk_value_length, padding_length;
|
|
guint8 type;
|
|
|
|
if (check_col(pinfo->cinfo, COL_INFO))
|
|
col_append_str(pinfo->cinfo, COL_INFO, "UNKNOWN ");
|
|
|
|
if (chunk_tree) {
|
|
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"));
|
|
}
|
|
}
|
|
|
|
|
|
static gboolean
|
|
dissect_sctp_chunk(tvbuff_t *chunk_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *sctp_tree)
|
|
{
|
|
guint8 type, flags;
|
|
guint16 length;
|
|
gboolean result;
|
|
proto_item *flags_item;
|
|
proto_item *chunk_item;
|
|
proto_tree *chunk_tree;
|
|
|
|
result = FALSE;
|
|
|
|
/* 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);
|
|
|
|
if (tree) {
|
|
/* create proto_tree stuff */
|
|
chunk_item = proto_tree_add_text(sctp_tree, chunk_tvb, CHUNK_HEADER_OFFSET, -1, "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(chunk_tree, hf_sctp_chunk_type, chunk_tvb, CHUNK_TYPE_OFFSET, CHUNK_TYPE_LENGTH, type);
|
|
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);
|
|
} else {
|
|
chunk_tree = NULL;
|
|
chunk_item = NULL;
|
|
flags_item = NULL;
|
|
};
|
|
|
|
/* now dissect the chunk value */
|
|
|
|
switch(type) {
|
|
case SCTP_DATA_CHUNK_ID:
|
|
result = 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, chunk_tree, chunk_item);
|
|
break;
|
|
case SCTP_INIT_ACK_CHUNK_ID:
|
|
dissect_init_ack_chunk(chunk_tvb, pinfo, chunk_tree, chunk_item);
|
|
break;
|
|
case SCTP_SACK_CHUNK_ID:
|
|
dissect_sack_chunk(chunk_tvb, pinfo, chunk_tree, chunk_item);
|
|
break;
|
|
case SCTP_HEARTBEAT_CHUNK_ID:
|
|
dissect_heartbeat_chunk(chunk_tvb, pinfo, chunk_tree, chunk_item);
|
|
break;
|
|
case SCTP_HEARTBEAT_ACK_CHUNK_ID:
|
|
dissect_heartbeat_ack_chunk(chunk_tvb, pinfo, chunk_tree, chunk_item);
|
|
break;
|
|
case SCTP_ABORT_CHUNK_ID:
|
|
dissect_abort_chunk(chunk_tvb, pinfo, chunk_tree, chunk_item, flags_item);
|
|
break;
|
|
case SCTP_SHUTDOWN_CHUNK_ID:
|
|
dissect_shutdown_chunk(chunk_tvb, pinfo, chunk_tree, chunk_item);
|
|
break;
|
|
case SCTP_SHUTDOWN_ACK_CHUNK_ID:
|
|
dissect_shutdown_ack_chunk(pinfo, chunk_tree, chunk_item);
|
|
break;
|
|
case SCTP_ERROR_CHUNK_ID:
|
|
dissect_error_chunk(chunk_tvb, pinfo, chunk_tree, chunk_item);
|
|
break;
|
|
case SCTP_COOKIE_ECHO_CHUNK_ID:
|
|
dissect_cookie_echo_chunk(chunk_tvb, pinfo, chunk_tree, chunk_item);
|
|
break;
|
|
case SCTP_COOKIE_ACK_CHUNK_ID:
|
|
dissect_cookie_ack_chunk(pinfo, chunk_tree, chunk_item);
|
|
break;
|
|
case SCTP_ECNE_CHUNK_ID:
|
|
dissect_ecne_chunk(chunk_tvb, pinfo, chunk_tree, chunk_item);
|
|
break;
|
|
case SCTP_CWR_CHUNK_ID:
|
|
dissect_cwr_chunk(chunk_tvb, pinfo, chunk_tree, chunk_item);
|
|
break;
|
|
case SCTP_SHUTDOWN_COMPLETE_CHUNK_ID:
|
|
dissect_shutdown_complete_chunk(chunk_tvb, pinfo, chunk_tree, chunk_item, flags_item);
|
|
break;
|
|
case SCTP_FORWARD_TSN_CHUNK_ID:
|
|
dissect_forward_tsn_chunk(chunk_tvb, pinfo, chunk_tree, chunk_item);
|
|
break;
|
|
case SCTP_ASCONF_ACK_CHUNK_ID:
|
|
dissect_asconf_ack_chunk(chunk_tvb, pinfo, chunk_tree, chunk_item);
|
|
break;
|
|
case SCTP_ASCONF_CHUNK_ID:
|
|
dissect_asconf_chunk(chunk_tvb, pinfo, chunk_tree, chunk_item);
|
|
break;
|
|
default:
|
|
dissect_unknown_chunk(chunk_tvb, pinfo, chunk_tree, chunk_item);
|
|
break;
|
|
};
|
|
return result;
|
|
}
|
|
|
|
static void
|
|
dissect_sctp_chunks(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, proto_item *sctp_item, proto_tree *sctp_tree)
|
|
{
|
|
tvbuff_t *chunk_tvb;
|
|
guint16 length, padding_length, total_length;
|
|
gint last_offset, offset;
|
|
gboolean sctp_item_length_set;
|
|
|
|
/* the common header of the datagram is already handled */
|
|
last_offset = 0;
|
|
offset = COMMON_HEADER_LENGTH;
|
|
sctp_item_length_set = FALSE;
|
|
|
|
while(tvb_reported_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 */
|
|
if (dissect_sctp_chunk(chunk_tvb, pinfo, tree, sctp_tree) && (tree)) {
|
|
proto_item_set_len(sctp_item, offset - last_offset + DATA_CHUNK_HEADER_LENGTH);
|
|
sctp_item_length_set = TRUE;
|
|
offset += total_length;
|
|
last_offset = offset;
|
|
if (tvb_reported_length_remaining(tvb, offset) > 0) {
|
|
sctp_item = proto_tree_add_item(tree, proto_sctp, tvb, offset, -1, FALSE);
|
|
sctp_tree = proto_item_add_subtree(sctp_item, ett_sctp);
|
|
sctp_item_length_set = FALSE;
|
|
}
|
|
} else {
|
|
/* get rid of the dissected chunk */
|
|
offset += total_length;
|
|
}
|
|
};
|
|
if (!sctp_item_length_set && (tree)) {
|
|
proto_item_set_len(sctp_item, offset - last_offset);
|
|
};
|
|
}
|
|
|
|
/* 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, calculated_crc32c, calculated_adler32;
|
|
guint length;
|
|
gboolean crc32c_correct, adler32_correct;
|
|
proto_item *sctp_item;
|
|
proto_tree *sctp_tree;
|
|
|
|
/* 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 */
|
|
pinfo->ptype = PT_SCTP;
|
|
pinfo->srcport = source_port;
|
|
pinfo->destport = destination_port;
|
|
|
|
/* make entry in the Protocol column on summary display */
|
|
if (check_col(pinfo->cinfo, COL_PROTOCOL))
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "SCTP");
|
|
|
|
/* Clear entries in Info column on summary display */
|
|
if (check_col(pinfo->cinfo, COL_INFO))
|
|
col_add_str(pinfo->cinfo, COL_INFO, "");
|
|
|
|
/* 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 */
|
|
sctp_item = proto_tree_add_item(tree, proto_sctp, tvb, 0, -1, FALSE);
|
|
sctp_tree = proto_item_add_subtree(sctp_item, 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_hidden(sctp_tree, hf_sctp_port, tvb, SOURCE_PORT_OFFSET, SOURCE_PORT_LENGTH, source_port);
|
|
proto_tree_add_uint_hidden(sctp_tree, hf_sctp_port, tvb, DESTINATION_PORT_OFFSET, DESTINATION_PORT_LENGTH, destination_port);
|
|
|
|
length = tvb_length(tvb);
|
|
switch(sctp_checksum) {
|
|
case SCTP_CHECKSUM_NONE:
|
|
proto_tree_add_uint_format(sctp_tree, hf_sctp_checksum, tvb, CHECKSUM_OFFSET, CHECKSUM_LENGTH, checksum, "Checksum: 0x%08x (not verified)", checksum);
|
|
break;
|
|
case SCTP_CHECKSUM_ADLER32:
|
|
calculated_adler32 = sctp_adler32(tvb_get_ptr(tvb, 0, length), length);
|
|
adler32_correct = (checksum == calculated_adler32);
|
|
if (adler32_correct)
|
|
proto_tree_add_uint_format(sctp_tree, hf_sctp_checksum, tvb, CHECKSUM_OFFSET, CHECKSUM_LENGTH,
|
|
checksum, "Checksum: 0x%08x (correct Adler32)", checksum);
|
|
else
|
|
proto_tree_add_uint_format(sctp_tree, hf_sctp_checksum, tvb, CHECKSUM_OFFSET, CHECKSUM_LENGTH,
|
|
checksum, "Checksum: 0x%08x (incorrect Adler32, should be 0x%08x)", checksum, calculated_adler32);
|
|
proto_tree_add_boolean_hidden(sctp_tree, hf_sctp_checksum_bad, tvb, CHECKSUM_OFFSET, CHECKSUM_LENGTH, !(adler32_correct));
|
|
break;
|
|
case SCTP_CHECKSUM_CRC32C:
|
|
calculated_crc32c = sctp_crc32c(tvb_get_ptr(tvb, 0, length), length);
|
|
crc32c_correct = (checksum == calculated_crc32c);
|
|
if (crc32c_correct)
|
|
proto_tree_add_uint_format(sctp_tree, hf_sctp_checksum, tvb, CHECKSUM_OFFSET, CHECKSUM_LENGTH,
|
|
checksum, "Checksum: 0x%08x (correct CRC32C)", checksum);
|
|
else
|
|
proto_tree_add_uint_format(sctp_tree, hf_sctp_checksum, tvb, CHECKSUM_OFFSET, CHECKSUM_LENGTH,
|
|
checksum, "Checksum: 0x%08x (incorrect CRC32C, should be 0x%08x)", checksum, calculated_crc32c);
|
|
proto_tree_add_boolean_hidden(sctp_tree, hf_sctp_checksum_bad, tvb, CHECKSUM_OFFSET, CHECKSUM_LENGTH, !(crc32c_correct));
|
|
break;
|
|
case SCTP_CHECKSUM_AUTOMATIC:
|
|
calculated_adler32 = sctp_adler32(tvb_get_ptr(tvb, 0, length), length);
|
|
adler32_correct = (checksum == calculated_adler32);
|
|
calculated_crc32c = sctp_crc32c(tvb_get_ptr(tvb, 0, length), length);
|
|
crc32c_correct = (checksum == calculated_crc32c);
|
|
if ((adler32_correct) && !(crc32c_correct))
|
|
proto_tree_add_uint_format(sctp_tree, hf_sctp_checksum, tvb, CHECKSUM_OFFSET, CHECKSUM_LENGTH,
|
|
checksum, "Checksum: 0x%08x (correct Adler32)", checksum);
|
|
else if (!(adler32_correct) && (crc32c_correct))
|
|
proto_tree_add_uint_format(sctp_tree, hf_sctp_checksum, tvb, CHECKSUM_OFFSET, CHECKSUM_LENGTH,
|
|
checksum, "Checksum: 0x%08x (correct CRC32C)", checksum);
|
|
else if ((adler32_correct) && (crc32c_correct))
|
|
proto_tree_add_uint_format(sctp_tree, hf_sctp_checksum, tvb, CHECKSUM_OFFSET, CHECKSUM_LENGTH,
|
|
checksum, "Checksum: 0x%08x (correct Adler32 and CRC32C)", checksum);
|
|
else
|
|
proto_tree_add_uint_format(sctp_tree, hf_sctp_checksum, tvb, CHECKSUM_OFFSET, CHECKSUM_LENGTH,
|
|
checksum, "Checksum: 0x%08x (incorrect, should be 0x%08x (Adler32) or 0x%08x (CRC32C))",
|
|
checksum, calculated_adler32, calculated_crc32c);
|
|
proto_tree_add_boolean_hidden(sctp_tree, hf_sctp_checksum_bad, tvb, CHECKSUM_OFFSET, CHECKSUM_LENGTH, !(crc32c_correct || adler32_correct));
|
|
break;
|
|
}
|
|
} else {
|
|
sctp_tree = NULL;
|
|
sctp_item = NULL;
|
|
};
|
|
/* add all chunks of the sctp datagram to the protocol tree */
|
|
dissect_sctp_chunks(tvb, pinfo, tree, sctp_item, 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,
|
|
"", HFILL }
|
|
},
|
|
{ &hf_sctp_destination_port,
|
|
{ "Destination port", "sctp.dstport",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
"", HFILL }
|
|
},
|
|
{ &hf_sctp_port,
|
|
{ "Port", "sctp.port",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
"", HFILL }
|
|
},
|
|
{ &hf_sctp_verification_tag,
|
|
{ "Verification tag", "sctp.verfication_tag",
|
|
FT_UINT32, BASE_HEX, NULL, 0x0,
|
|
"", HFILL }
|
|
},
|
|
{ &hf_sctp_checksum,
|
|
{ "Checksum", "sctp.checksum",
|
|
FT_UINT32, BASE_HEX, NULL, 0x0,
|
|
"", HFILL }
|
|
},
|
|
{ &hf_sctp_checksum_bad,
|
|
{ "Bad checksum", "sctp.checksum_bad",
|
|
FT_BOOLEAN, BASE_NONE, NULL, 0x0,
|
|
"", HFILL }
|
|
},
|
|
{ &hf_sctp_chunk_type,
|
|
{ "Identifier", "sctp.chunk_type",
|
|
FT_UINT8, BASE_DEC, VALS(sctp_chunk_type_values), 0x0,
|
|
"", HFILL }
|
|
},
|
|
{ &hf_sctp_chunk_flags,
|
|
{ "Flags", "sctp.chunk_flags",
|
|
FT_UINT8, BASE_BIN, NULL, 0x0,
|
|
"", HFILL }
|
|
},
|
|
{ &hf_sctp_chunk_length,
|
|
{ "Length", "sctp.chunk_length",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
"", HFILL }
|
|
},
|
|
{ &hf_sctp_init_chunk_initiate_tag,
|
|
{ "Initiate tag", "sctp.init.chunk.initiate.tag",
|
|
FT_UINT32, BASE_HEX, NULL, 0x0,
|
|
"", HFILL }
|
|
},
|
|
{ &hf_sctp_init_chunk_adv_rec_window_credit,
|
|
{ "Advertised reciever window credit (a_rwnd)", "sctp.init.chunk.credit",
|
|
FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
"", HFILL }
|
|
},
|
|
{ &hf_sctp_init_chunk_number_of_outbound_streams,
|
|
{ "Number of outbound streams", "sctp.init.chunk.nr.out.streams",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
"", HFILL }
|
|
},
|
|
{ &hf_sctp_init_chunk_number_of_inbound_streams,
|
|
{ "Number of inbound streams", "sctp.init.chunk.nr.in.streams",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
"", HFILL }
|
|
},
|
|
{&hf_sctp_init_chunk_initial_tsn,
|
|
{ "Initial TSN", "sctp.init.chunk.initial.tsn",
|
|
FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
"", HFILL }
|
|
},
|
|
{&hf_sctp_cumulative_tsn_ack,
|
|
{ "Cumulative TSN Ack", "sctp.cumulative.tsn.ack",
|
|
FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
"", HFILL }
|
|
},
|
|
{&hf_sctp_data_chunk_tsn,
|
|
{ "TSN", "sctp.tsn",
|
|
FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
"", HFILL }
|
|
},
|
|
{&hf_sctp_data_chunk_stream_id,
|
|
{ "Stream Identifier", "sctp.stream_id",
|
|
FT_UINT16, BASE_HEX, NULL, 0x0,
|
|
"", HFILL }
|
|
},
|
|
{&hf_sctp_data_chunk_stream_seq_number,
|
|
{ "Stream sequence number", "sctp.stream_seq_number",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
"", HFILL }
|
|
},
|
|
{&hf_sctp_data_chunk_payload_proto_id,
|
|
{ "Payload protocol identifier", "sctp.payload_proto_id",
|
|
FT_UINT32, BASE_DEC, VALS(sctp_payload_proto_id_values), 0x0,
|
|
"", HFILL }
|
|
},
|
|
{&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,
|
|
"", HFILL }
|
|
},
|
|
{&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,
|
|
"", HFILL }
|
|
},
|
|
{&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,
|
|
"", HFILL }
|
|
},
|
|
{&hf_sctp_sack_chunk_cumulative_tsn_ack,
|
|
{ "Cumulative TSN ACK", "sctp.sack.cumulative_tsn_ack",
|
|
FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
"", HFILL }
|
|
},
|
|
{&hf_sctp_sack_chunk_adv_rec_window_credit,
|
|
{ "Advertised receiver window credit (a_rwnd)", "sctp.sack.a_rwnd",
|
|
FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
"", HFILL }
|
|
},
|
|
{&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,
|
|
"", HFILL }
|
|
},
|
|
{&hf_sctp_sack_chunk_number_of_dup_tsns,
|
|
{ "Number of duplicated TSNs", "sctp.sack.number_of_duplicated_tsns",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
"", HFILL }
|
|
},
|
|
{&hf_sctp_sack_chunk_gap_block_start,
|
|
{ "Start", "sctp.sack.gap_block_start",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
"", HFILL }
|
|
},
|
|
{&hf_sctp_sack_chunk_gap_block_end,
|
|
{ "End", "sctp.sack.gap_block_end",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
"", HFILL }
|
|
},
|
|
{&hf_sctp_sack_chunk_duplicate_tsn,
|
|
{ "Duplicate TSN", "sctp.sack.duplicate.tsn",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
"", HFILL }
|
|
},
|
|
{&hf_sctp_shutdown_chunk_cumulative_tsn_ack,
|
|
{ "Cumulative TSN Ack", "sctp.shutdown.cumulative_tsn_ack",
|
|
FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
"", HFILL }
|
|
},
|
|
{&hf_sctp_ecne_chunk_lowest_tsn,
|
|
{ "Lowest TSN", "sctp.ecne.lowest_tsn",
|
|
FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
"", HFILL }
|
|
},
|
|
{&hf_sctp_cwr_chunk_lowest_tsn,
|
|
{ "Lowest TSN", "sctp.cwr.lowest_tsn",
|
|
FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
"", HFILL }
|
|
},
|
|
{&hf_sctp_shutdown_complete_chunk_t_bit,
|
|
{ "T-Bit", "sctp.shutdown_complete.t_bit",
|
|
FT_BOOLEAN, 8, TFS(&sctp_shutdown_complete_chunk_t_bit_value), SCTP_SHUTDOWN_COMPLETE_CHUNK_T_BIT,
|
|
"", HFILL }
|
|
},
|
|
{&hf_sctp_abort_chunk_t_bit,
|
|
{ "T-Bit", "sctp.abort.t_bit",
|
|
FT_BOOLEAN, 8, TFS(&sctp_shutdown_complete_chunk_t_bit_value), SCTP_SHUTDOWN_COMPLETE_CHUNK_T_BIT,
|
|
"", HFILL }
|
|
},
|
|
{&hf_sctp_forward_tsn_chunk_tsn,
|
|
{ "New cumulative TSN", "sctp.forward_tsn.tsn",
|
|
FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
"", HFILL }
|
|
},
|
|
{&hf_sctp_chunk_parameter_type,
|
|
{ "Parameter type", "sctp.parameter.type",
|
|
FT_UINT16, BASE_HEX, VALS(sctp_parameter_identifier_values), 0x0,
|
|
"", HFILL }
|
|
},
|
|
{&hf_sctp_chunk_parameter_length,
|
|
{ "Parameter length", "sctp.parameter.length",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
"", HFILL }
|
|
},
|
|
{&hf_sctp_parameter_ipv4_address,
|
|
{ "IP Version 4 address", "sctp.parameter.ipv4_address",
|
|
FT_IPv4, BASE_NONE, NULL, 0x0,
|
|
"", HFILL }
|
|
},
|
|
{&hf_sctp_parameter_ipv6_address,
|
|
{ "IP Version 6 address", "sctp.parameter.ipv6_address",
|
|
FT_IPv6, BASE_NONE, NULL, 0x0,
|
|
"", HFILL }
|
|
},
|
|
{&hf_sctp_parameter_cookie_preservative_increment,
|
|
{ "Suggested Cookie life-span increment (msec)", "sctp.parameter.cookie_preservative_incr",
|
|
FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
"", HFILL }
|
|
},
|
|
{&hf_sctp_parameter_hostname_hostname,
|
|
{ "Hostname", "sctp.parameter.hostname.hostname",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
"", HFILL }
|
|
},
|
|
{&hf_sctp_supported_address_types_parameter,
|
|
{ "Supported address type", "sctp.parameter.supported_addres_type",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
"", HFILL }
|
|
},
|
|
{&hf_sctp_ustreams_start,
|
|
{ "Start", "sctp.unreliable_streams.start",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
"", HFILL }
|
|
},
|
|
{&hf_sctp_ustreams_end,
|
|
{ "End", "sctp.unreliable_streams.end",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
"", HFILL }
|
|
},
|
|
{&hf_sctp_asconf_serial,
|
|
{ "Serial Number", "sctp.asconf.serial_number",
|
|
FT_UINT32, BASE_HEX, NULL, 0x0,
|
|
"", HFILL }
|
|
},
|
|
{&hf_sctp_asconf_correlation_id,
|
|
{ "Correlation_id", "sctp.asconf.correlation_id",
|
|
FT_UINT32, BASE_HEX, NULL, 0x0,
|
|
"", HFILL }
|
|
},
|
|
{&hf_sctp_asconf_reserved,
|
|
{ "Reserved", "sctp.asconf.reserved",
|
|
FT_BYTES, BASE_NONE, NULL, 0x0,
|
|
"", HFILL }
|
|
},
|
|
{&hf_sctp_asconf_addr_type,
|
|
{ "Address type", "sctp.asconf.address_type",
|
|
FT_UINT8, BASE_HEX, VALS(sctp_address_type_values), 0x0,
|
|
"", HFILL }
|
|
},
|
|
{&hf_sctp_asconf_addr,
|
|
{ "Address bytes", "sctp.asconf.address_bytes",
|
|
FT_BYTES, BASE_NONE, NULL, 0x0,
|
|
"", HFILL }
|
|
},
|
|
{&hf_sctp_asconf_ipv4_address,
|
|
{ "IP Version 4 address", "sctp.asconf.ipv4_address",
|
|
FT_IPv4, BASE_NONE, NULL, 0x0,
|
|
"", HFILL }
|
|
},
|
|
{&hf_sctp_asconf_ipv6_address,
|
|
{ "IP Version 6 address", "sctp.asconf.ipv6_address",
|
|
FT_IPv6, BASE_NONE, NULL, 0x0,
|
|
"", HFILL }
|
|
},
|
|
{&hf_sctp_asconf_ack_serial,
|
|
{ "Serial Number", "sctp.asconf_ack.serial_number",
|
|
FT_UINT32, BASE_HEX, NULL, 0x0,
|
|
"", HFILL }
|
|
},
|
|
{&hf_sctp_asconf_ack_correlation_id,
|
|
{ "Correlation_id", "sctp.asconf_ack.correlation_id",
|
|
FT_UINT32, BASE_HEX, NULL, 0x0,
|
|
"", HFILL }
|
|
},
|
|
{&hf_sctp_adap_indication,
|
|
{ "Indication", "sctp.adapation_layer_indication.indication",
|
|
FT_UINT32, BASE_HEX, NULL, 0x0,
|
|
"", HFILL }
|
|
},
|
|
{&hf_sctp_cause_code,
|
|
{ "Cause code", "sctp.cause.code",
|
|
FT_UINT16, BASE_HEX, VALS(sctp_cause_code_values), 0x0,
|
|
"", HFILL }
|
|
},
|
|
{&hf_sctp_cause_length,
|
|
{ "Cause length", "sctp.cause.length",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
"", HFILL }
|
|
},
|
|
{&hf_sctp_cause_stream_identifier,
|
|
{ "Stream identifier", "sctp.cause.stream_identifier",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
"", HFILL }
|
|
},
|
|
{&hf_sctp_cause_number_of_missing_parameters,
|
|
{ "Number of missing parameters", "sctp.cause.nr_of_missing_parameters",
|
|
FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
"", HFILL }
|
|
},
|
|
{&hf_sctp_cause_missing_parameter_type,
|
|
{ "Missing parameter type", "sctp.cause.missing_parameter_type",
|
|
FT_UINT16, BASE_HEX, VALS(sctp_parameter_identifier_values), 0x0,
|
|
"", HFILL }
|
|
},
|
|
{&hf_sctp_cause_measure_of_staleness,
|
|
{ "Measure of staleness in usec", "sctp.cause.measure_of_staleness",
|
|
FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
"", HFILL }
|
|
},
|
|
{&hf_sctp_cause_tsn,
|
|
{ "TSN", "sctp.cause.tsn",
|
|
FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
"", HFILL }
|
|
},
|
|
};
|
|
|
|
/* 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_shutdown_complete_chunk_flags,
|
|
&ett_sctp_abort_chunk_flags,
|
|
&ett_sctp_sack_chunk_gap_block,
|
|
&ett_sctp_supported_address_types_parameter,
|
|
&ett_sctp_unrecognized_parameter_parameter,
|
|
&ett_sctp_unreliable_streams_interval
|
|
};
|
|
|
|
static enum_val_t sctp_checksum_options[] = {
|
|
{ "None", SCTP_CHECKSUM_NONE },
|
|
{ "Adler 32", SCTP_CHECKSUM_ADLER32 },
|
|
{ "CRC 32c", SCTP_CHECKSUM_CRC32C },
|
|
{ "Automatic", SCTP_CHECKSUM_AUTOMATIC},
|
|
{ NULL, 0 }
|
|
};
|
|
|
|
/* Register the protocol name and description */
|
|
proto_sctp = proto_register_protocol("Stream Control Transmission Protocol", "SCTP", "sctp");
|
|
sctp_module = prefs_register_protocol(proto_sctp, NULL);
|
|
prefs_register_enum_preference(sctp_module, "checksum",
|
|
"Checksum type",
|
|
"The type of checksum used in SCTP packets",
|
|
&sctp_checksum, sctp_checksum_options, FALSE);
|
|
|
|
/* 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_port_dissector_table = register_dissector_table("sctp.port", "SCTP port", FT_UINT16, BASE_DEC);
|
|
sctp_ppi_dissector_table = register_dissector_table("sctp.ppi", "SCTP payload protocol identifier", FT_UINT32, BASE_HEX);
|
|
|
|
};
|
|
|
|
void
|
|
proto_reg_handoff_sctp(void)
|
|
{
|
|
dissector_handle_t sctp_handle;
|
|
|
|
sctp_handle = create_dissector_handle(dissect_sctp, proto_sctp);
|
|
dissector_add("ip.proto", IP_PROTO_SCTP, sctp_handle);
|
|
}
|