d23f2e7347
- Changed the default checksum algorithm from Adler32 to CRC32C. svn path=/trunk/; revision=8600
2239 lines
116 KiB
C
2239 lines
116 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
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* - RFC 3309
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* - http://www.ietf.org/internet-drafts/draft-ietf-tsvwg-sctpimpguide-09.txt
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* - http://www.ietf.org/internet-drafts/draft-ietf-tsvwg-addip-sctp-08.txt for the add-IP extension
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* - http://www.ietf.org/internet-drafts/draft-stewart-tsvwg-prsctp-04.txt for the 'Partial Reliability' extension
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* - another upcoming ID on packetdrop stuff.
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* Copyright 2000, 2001, 2002, 2003 Michael Tuexen <tuexen [AT] fh-muenster.de>
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* Still to do (so stay tuned)
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* - support for reassembly
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* - error checking mode
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*
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* $Id: packet-sctp.c,v 1.65 2003/10/03 20:18:15 tuexen 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 "prefs.h"
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#include <epan/packet.h>
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#include "ipproto.h"
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#include "sctpppids.h"
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#define NETWORK_BYTE_ORDER FALSE
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#define ADD_PADDING(x) ((((x) + 3) >> 2) << 2)
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#define UDP_TUNNELING_PORT 9899
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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_port = -1;
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static int hf_source_port = -1;
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static int hf_destination_port = -1;
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static int hf_verification_tag = -1;
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static int hf_checksum = -1;
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static int hf_checksum_bad = -1;
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static int hf_chunk_type = -1;
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static int hf_chunk_flags = -1;
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static int hf_chunk_bit_1 = -1;
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static int hf_chunk_bit_2 = -1;
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static int hf_chunk_length = -1;
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static int hf_chunk_padding = -1;
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static int hf_chunk_value = -1;
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static int hf_init_chunk_initiate_tag = -1;
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static int hf_init_chunk_adv_rec_window_credit = -1;
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static int hf_init_chunk_number_of_outbound_streams = -1;
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static int hf_init_chunk_number_of_inbound_streams = -1;
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static int hf_init_chunk_initial_tsn = -1;
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static int hf_initack_chunk_initiate_tag = -1;
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static int hf_initack_chunk_adv_rec_window_credit = -1;
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static int hf_initack_chunk_number_of_outbound_streams = -1;
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static int hf_initack_chunk_number_of_inbound_streams = -1;
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static int hf_initack_chunk_initial_tsn = -1;
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static int hf_cumulative_tsn_ack = -1;
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static int hf_data_chunk_tsn = -1;
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static int hf_data_chunk_stream_id = -1;
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static int hf_data_chunk_stream_seq_number = -1;
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static int hf_data_chunk_payload_proto_id = -1;
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static int hf_data_chunk_e_bit = -1;
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static int hf_data_chunk_b_bit = -1;
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static int hf_data_chunk_u_bit = -1;
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static int hf_sack_chunk_cumulative_tsn_ack = -1;
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static int hf_sack_chunk_adv_rec_window_credit = -1;
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static int hf_sack_chunk_number_of_gap_blocks = -1;
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static int hf_sack_chunk_number_of_dup_tsns = -1;
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static int hf_sack_chunk_gap_block_start = -1;
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static int hf_sack_chunk_gap_block_end = -1;
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static int hf_sack_chunk_duplicate_tsn = -1;
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static int hf_shutdown_chunk_cumulative_tsn_ack = -1;
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static int hf_cookie = -1;
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static int hf_cwr_chunk_lowest_tsn = -1;
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static int hf_ecne_chunk_lowest_tsn = -1;
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static int hf_abort_chunk_t_bit = -1;
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static int hf_shutdown_complete_chunk_t_bit = -1;
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static int hf_parameter_type = -1;
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static int hf_parameter_length = -1;
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static int hf_parameter_value = -1;
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static int hf_parameter_padding = -1;
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static int hf_parameter_bit_1 = -1;
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static int hf_parameter_bit_2 = -1;
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static int hf_ipv4_address = -1;
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static int hf_ipv6_address = -1;
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static int hf_heartbeat_info = -1;
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static int hf_state_cookie = -1;
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static int hf_cookie_preservative_increment = -1;
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static int hf_hostname = -1;
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static int hf_supported_address_type = -1;
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static int hf_cause_code = -1;
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static int hf_cause_length = -1;
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static int hf_cause_padding = -1;
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static int hf_cause_info = -1;
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static int hf_cause_stream_identifier = -1;
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static int hf_cause_reserved = -1;
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static int hf_cause_number_of_missing_parameters = -1;
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static int hf_cause_missing_parameter_type = -1;
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static int hf_cause_measure_of_staleness = -1;
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static int hf_cause_tsn = -1;
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static int hf_forward_tsn_chunk_tsn = -1;
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static int hf_forward_tsn_chunk_sid = -1;
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static int hf_forward_tsn_chunk_ssn = -1;
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static int hf_asconf_ack_serial = -1;
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static int hf_asconf_serial = -1;
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static int hf_correlation_id = -1;
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static int hf_adap_indication = -1;
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static int hf_pktdrop_chunk_m_bit = -1;
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/*
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static int hf_pktdrop_chunk_s_bit = -1;
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*/
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static int hf_pktdrop_chunk_b_bit = -1;
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static int hf_pktdrop_chunk_t_bit = -1;
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static int hf_pktdrop_chunk_bandwidth = -1;
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static int hf_pktdrop_chunk_queuesize = -1;
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static int hf_pktdrop_chunk_truncated_length = -1;
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static int hf_pktdrop_chunk_reserved = -1;
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static int hf_pktdrop_chunk_data_field = -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 heur_dissector_list_t sctp_heur_subdissector_list;
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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_chunk_type = -1;
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static gint ett_sctp_data_chunk_flags = -1;
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static gint ett_sctp_abort_chunk_flags = -1;
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static gint ett_sctp_shutdown_complete_chunk_flags = -1;
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static gint ett_sctp_pktdrop_chunk_flags = -1;
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static gint ett_sctp_parameter_type= -1;
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static gint ett_sctp_sack_chunk_gap_block = -1;
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static gint ett_sctp_unrecognized_parameter_parameter = -1;
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static dissector_handle_t data_handle;
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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_PKTDROP_CHUNK_ID 0X81
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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 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_PKTDROP_CHUNK_ID, "PKTDROP" },
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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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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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{ H248_PAYLOAD_PROTOCOL_ID, "H.248/MEGACO" },
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{ BICC_PAYLOAD_PROTOCOL_ID, "BICC/Q.2150.3" },
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{ TALI_PAYLOAD_PROTOCOL_ID, "TALI" },
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{ DUA_PAYLOAD_PROTOCOL_ID, "DUA" },
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{ ASAP_PAYLOAD_PROTOCOL_ID, "ASAP" },
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{ ENRP_PAYLOAD_PROTOCOL_ID, "ENRP" },
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{ H323_PAYLOAD_PROTOCOL_ID, "H.323" },
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{ 0, NULL } };
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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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#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 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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#define SCTP_CHECKSUM_NONE 0
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#define SCTP_CHECKSUM_ADLER32 1
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#define SCTP_CHECKSUM_CRC32C 2
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#define SCTP_CHECKSUM_AUTOMATIC 3
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static gboolean show_always_control_chunks = TRUE;
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static gint sctp_checksum = SCTP_CHECKSUM_CRC32C;
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/* adler32.c -- compute the Adler-32 checksum of a data stream
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* Copyright (C) 1995-1996 Mark Adler
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* For conditions of distribution and use, see copyright notice in zlib.h
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* available, e.g. from http://www.cdrom.com/pub/infozip/zlib/
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*
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* It was modified for the use in this dissector.
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*/
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#define BASE 65521L /* largest prime smaller than 65536 */
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#define NMAX 5540 /* NMAX is the largest n - 12 such that */
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/* 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1 */
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#define DO1(buf,i) {s1 += buf[i]; s2 += s1;}
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#define DO2(buf,i) DO1(buf,i); DO1(buf,i+1);
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#define DO4(buf,i) DO2(buf,i); DO2(buf,i+2);
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#define DO8(buf,i) DO4(buf,i); DO4(buf,i+4);
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#define DO16(buf) DO8(buf,0); DO8(buf,8);
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static unsigned int
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sctp_adler32(const unsigned char* buf, unsigned int len)
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{
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unsigned int s1 = 1L;
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unsigned int s2 = 0L;
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int k;
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/* handle the first 8 bytes of the datagram */
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DO8(buf,0);
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buf += SOURCE_PORT_LENGTH +
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DESTINATION_PORT_LENGTH +
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VERIFICATION_TAG_LENGTH;
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/* handle four 0 bytes as checksum */
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s2 += CHECKSUM_LENGTH * s1;
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buf += CHECKSUM_LENGTH;
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/* now we have 12 bytes handled */
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len -= COMMON_HEADER_LENGTH;
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/* handle the rest of the datagram */
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while (len > 0) {
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k = len < NMAX ? len : NMAX;
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len -= k;
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while (k >= 16) {
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DO16(buf);
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buf += 16;
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k -= 16;
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}
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if (k != 0) do {
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s1 += *buf++;
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s2 += s1;
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} while (--k);
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s1 %= BASE;
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s2 %= BASE;
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}
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return (s2 << 16) | s1;
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}
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/* The CRC32C code is taken from draft-ietf-tsvwg-sctpcsum-01.txt.
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* That code is copyrighted by D. Otis and has been modified.
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*
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* Polynomial is
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*
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* x^32 + x^28 + x^27 + x^26 + x^25 + x^23 + x^22 + x^20 + x^19 +
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* x^18 + x^14 + x^13 + x^11 + x^10 + x^9 + x^8 + x^6 + 1
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*
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* Note that this is not the AUTODIN/HDLC/802.x CRC - it uses a different
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* polynomial.
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*/
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#define CRC32C(c,d) (c=(c>>8)^crc_c[(c^(d))&0xFF])
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static guint32 crc_c[256] =
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{
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0x00000000L, 0xF26B8303L, 0xE13B70F7L, 0x1350F3F4L,
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0xC79A971FL, 0x35F1141CL, 0x26A1E7E8L, 0xD4CA64EBL,
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0x8AD958CFL, 0x78B2DBCCL, 0x6BE22838L, 0x9989AB3BL,
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0x4D43CFD0L, 0xBF284CD3L, 0xAC78BF27L, 0x5E133C24L,
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0x105EC76FL, 0xE235446CL, 0xF165B798L, 0x030E349BL,
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0xD7C45070L, 0x25AFD373L, 0x36FF2087L, 0xC494A384L,
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0x9A879FA0L, 0x68EC1CA3L, 0x7BBCEF57L, 0x89D76C54L,
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0x5D1D08BFL, 0xAF768BBCL, 0xBC267848L, 0x4E4DFB4BL,
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0x20BD8EDEL, 0xD2D60DDDL, 0xC186FE29L, 0x33ED7D2AL,
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0xE72719C1L, 0x154C9AC2L, 0x061C6936L, 0xF477EA35L,
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0xAA64D611L, 0x580F5512L, 0x4B5FA6E6L, 0xB93425E5L,
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0x6DFE410EL, 0x9F95C20DL, 0x8CC531F9L, 0x7EAEB2FAL,
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0x30E349B1L, 0xC288CAB2L, 0xD1D83946L, 0x23B3BA45L,
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0xF779DEAEL, 0x05125DADL, 0x1642AE59L, 0xE4292D5AL,
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0xBA3A117EL, 0x4851927DL, 0x5B016189L, 0xA96AE28AL,
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0x7DA08661L, 0x8FCB0562L, 0x9C9BF696L, 0x6EF07595L,
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0x417B1DBCL, 0xB3109EBFL, 0xA0406D4BL, 0x522BEE48L,
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0x86E18AA3L, 0x748A09A0L, 0x67DAFA54L, 0x95B17957L,
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0xCBA24573L, 0x39C9C670L, 0x2A993584L, 0xD8F2B687L,
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0x0C38D26CL, 0xFE53516FL, 0xED03A29BL, 0x1F682198L,
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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 guint32
|
|
sctp_crc32c(const unsigned char* buf, unsigned int len)
|
|
{
|
|
unsigned int i;
|
|
guint32 crc32 = ~0L;
|
|
guint32 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 );
|
|
}
|
|
|
|
/*
|
|
* Routines for dissecting parameters
|
|
*/
|
|
|
|
static void
|
|
dissect_parameter(tvbuff_t *, packet_info *, proto_tree *, proto_item *);
|
|
|
|
static void
|
|
dissect_parameters(tvbuff_t *, packet_info *, proto_tree *, proto_item *);
|
|
|
|
static void
|
|
dissect_error_cause(tvbuff_t *, packet_info *, proto_tree *);
|
|
|
|
static void
|
|
dissect_error_causes(tvbuff_t *, packet_info *, proto_tree *);
|
|
|
|
static gboolean
|
|
dissect_sctp_chunk(tvbuff_t *, packet_info *, proto_tree *, proto_tree *, gboolean);
|
|
|
|
static void
|
|
dissect_sctp_packet(tvbuff_t *, packet_info *, proto_tree *);
|
|
|
|
|
|
|
|
#define HEARTBEAT_INFO_PARAMETER_INFO_OFFSET PARAMETER_VALUE_OFFSET
|
|
|
|
static void
|
|
dissect_heartbeat_info_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
|
|
{
|
|
guint16 heartbeat_info_length;
|
|
|
|
heartbeat_info_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
|
|
if (heartbeat_info_length > 0)
|
|
proto_tree_add_item(parameter_tree, hf_heartbeat_info, parameter_tvb, HEARTBEAT_INFO_PARAMETER_INFO_OFFSET, heartbeat_info_length, NETWORK_BYTE_ORDER);
|
|
proto_item_append_text(parameter_item, " (Information: %u byte%s)", heartbeat_info_length, plurality(heartbeat_info_length, "", "s"));
|
|
}
|
|
|
|
#define IPV4_ADDRESS_LENGTH 4
|
|
#define IPV4_ADDRESS_OFFSET PARAMETER_VALUE_OFFSET
|
|
|
|
static void
|
|
dissect_ipv4_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item, proto_item *additional_item)
|
|
{
|
|
proto_tree_add_item(parameter_tree, hf_ipv4_address, parameter_tvb, IPV4_ADDRESS_OFFSET, IPV4_ADDRESS_LENGTH, NETWORK_BYTE_ORDER);
|
|
proto_item_append_text(parameter_item, " (Address: %s)", ip_to_str((const guint8 *)tvb_get_ptr(parameter_tvb, IPV4_ADDRESS_OFFSET, IPV4_ADDRESS_LENGTH)));
|
|
if (additional_item)
|
|
proto_item_append_text(additional_item, "%s", ip_to_str((const guint8 *)tvb_get_ptr(parameter_tvb, IPV4_ADDRESS_OFFSET, IPV4_ADDRESS_LENGTH)));
|
|
}
|
|
|
|
#define IPV6_ADDRESS_LENGTH 16
|
|
#define IPV6_ADDRESS_OFFSET PARAMETER_VALUE_OFFSET
|
|
|
|
static void
|
|
dissect_ipv6_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item, proto_item *additional_item)
|
|
{
|
|
proto_tree_add_item(parameter_tree, hf_ipv6_address, parameter_tvb, IPV6_ADDRESS_OFFSET, IPV6_ADDRESS_LENGTH, NETWORK_BYTE_ORDER);
|
|
proto_item_append_text(parameter_item, " (Address: %s)", ip6_to_str((const struct e_in6_addr *)tvb_get_ptr(parameter_tvb, IPV6_ADDRESS_OFFSET, IPV6_ADDRESS_LENGTH)));
|
|
if (additional_item)
|
|
proto_item_append_text(additional_item, "%s", ip6_to_str((const struct e_in6_addr *)tvb_get_ptr(parameter_tvb, IPV6_ADDRESS_OFFSET, IPV6_ADDRESS_LENGTH)));
|
|
}
|
|
|
|
#define STATE_COOKIE_PARAMETER_COOKIE_OFFSET PARAMETER_VALUE_OFFSET
|
|
|
|
static void
|
|
dissect_state_cookie_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
|
|
{
|
|
guint16 state_cookie_length;
|
|
|
|
state_cookie_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
|
|
if (state_cookie_length > 0)
|
|
proto_tree_add_item(parameter_tree, hf_state_cookie, parameter_tvb, STATE_COOKIE_PARAMETER_COOKIE_OFFSET, state_cookie_length, NETWORK_BYTE_ORDER);
|
|
proto_item_append_text(parameter_item, " (Cookie length: %u byte%s)", 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)
|
|
{
|
|
/* FIXME: Does it contain one or more parameters? */
|
|
dissect_parameter(tvb_new_subset(parameter_tvb, PARAMETER_VALUE_OFFSET, -1, -1), pinfo, parameter_tree, NULL);
|
|
}
|
|
|
|
#define COOKIE_PRESERVATIVE_PARAMETER_INCR_LENGTH 4
|
|
#define COOKIE_PRESERVATIVE_PARAMETER_INCR_OFFSET PARAMETER_VALUE_OFFSET
|
|
|
|
static void
|
|
dissect_cookie_preservative_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
|
|
{
|
|
proto_tree_add_item(parameter_tree, hf_cookie_preservative_increment, parameter_tvb, COOKIE_PRESERVATIVE_PARAMETER_INCR_OFFSET, COOKIE_PRESERVATIVE_PARAMETER_INCR_LENGTH, NETWORK_BYTE_ORDER);
|
|
proto_item_append_text(parameter_item, " (Increment :%u msec)", tvb_get_ntohl(parameter_tvb, COOKIE_PRESERVATIVE_PARAMETER_INCR_OFFSET));
|
|
}
|
|
|
|
#define HOSTNAME_OFFSET PARAMETER_VALUE_OFFSET
|
|
|
|
static void
|
|
dissect_hostname_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
|
|
{
|
|
guint16 hostname_length;
|
|
|
|
hostname_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
|
|
proto_tree_add_item(parameter_tree, hf_hostname, parameter_tvb, HOSTNAME_OFFSET, hostname_length, NETWORK_BYTE_ORDER);
|
|
proto_item_append_text(parameter_item, " (Hostname: %.*s)", hostname_length, (const char *)tvb_get_ptr(parameter_tvb, HOSTNAME_OFFSET, hostname_length));
|
|
|
|
}
|
|
|
|
#define IPv4_ADDRESS_TYPE 5
|
|
#define IPv6_ADDRESS_TYPE 6
|
|
#define HOSTNAME_ADDRESS_TYPE 11
|
|
|
|
static const value_string address_types_values[] = {
|
|
{ IPv4_ADDRESS_TYPE, "IPv4 address" },
|
|
{ IPv6_ADDRESS_TYPE, "IPv6 address" },
|
|
{ HOSTNAME_ADDRESS_TYPE, "Hostname address" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
#define SUPPORTED_ADDRESS_TYPE_PARAMETER_ADDRESS_TYPE_LENGTH 2
|
|
|
|
static void
|
|
dissect_supported_address_types_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
|
|
{
|
|
guint16 address_type, number_of_address_types, address_type_number;
|
|
guint offset;
|
|
|
|
number_of_address_types = (tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH)
|
|
/ SUPPORTED_ADDRESS_TYPE_PARAMETER_ADDRESS_TYPE_LENGTH;
|
|
|
|
offset = PARAMETER_VALUE_OFFSET;
|
|
proto_item_append_text(parameter_item, " (Supported types: ");
|
|
for(address_type_number = 1; address_type_number <= number_of_address_types; address_type_number++) {
|
|
proto_tree_add_item(parameter_tree, hf_supported_address_type, parameter_tvb, offset, SUPPORTED_ADDRESS_TYPE_PARAMETER_ADDRESS_TYPE_LENGTH, NETWORK_BYTE_ORDER);
|
|
address_type = tvb_get_ntohs(parameter_tvb, offset);
|
|
switch (address_type) {
|
|
case IPv4_ADDRESS_TYPE:
|
|
proto_item_append_text(parameter_item, "IPv4");
|
|
break;
|
|
case IPv6_ADDRESS_TYPE:
|
|
proto_item_append_text(parameter_item, "IPv6");
|
|
break;
|
|
case HOSTNAME_ADDRESS_TYPE:
|
|
proto_item_append_text(parameter_item, "hostname");
|
|
break;
|
|
default:
|
|
proto_item_append_text(parameter_item, "%u", address_type);
|
|
}
|
|
if (address_type_number < number_of_address_types)
|
|
proto_item_append_text(parameter_item, ", ");
|
|
offset += SUPPORTED_ADDRESS_TYPE_PARAMETER_ADDRESS_TYPE_LENGTH;
|
|
};
|
|
proto_item_append_text(parameter_item, ")");
|
|
}
|
|
|
|
static void
|
|
dissect_ecn_parameter(tvbuff_t *parameter_tvb _U_)
|
|
{
|
|
}
|
|
|
|
static void
|
|
dissect_forward_tsn_supported_parameter(tvbuff_t *parameter_tvb _U_)
|
|
{
|
|
}
|
|
|
|
#define CORRELATION_ID_LENGTH 4
|
|
#define CORRELATION_ID_OFFSET PARAMETER_VALUE_OFFSET
|
|
#define ADDRESS_PARAMETER_OFFSET (CORRELATION_ID_OFFSET + CORRELATION_ID_LENGTH)
|
|
|
|
static void
|
|
dissect_add_ip_address_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *parameter_tree, proto_item *parameter_item)
|
|
{
|
|
guint16 address_length;
|
|
tvbuff_t *address_tvb;
|
|
|
|
address_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH - CORRELATION_ID_LENGTH;
|
|
|
|
proto_tree_add_item(parameter_tree, hf_correlation_id, parameter_tvb, CORRELATION_ID_OFFSET, CORRELATION_ID_LENGTH, NETWORK_BYTE_ORDER);
|
|
address_tvb = tvb_new_subset(parameter_tvb, ADDRESS_PARAMETER_OFFSET, address_length, address_length);
|
|
proto_item_append_text(parameter_item, " (Address: ");
|
|
dissect_parameter(address_tvb, pinfo, parameter_tree, parameter_item);
|
|
proto_item_append_text(parameter_item, ", correlation ID: %u)", tvb_get_ntohl(parameter_tvb, CORRELATION_ID_OFFSET));
|
|
}
|
|
|
|
static void
|
|
dissect_del_ip_address_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *parameter_tree, proto_item *parameter_item)
|
|
{
|
|
guint16 address_length;
|
|
tvbuff_t *address_tvb;
|
|
|
|
address_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH - CORRELATION_ID_LENGTH;
|
|
|
|
proto_tree_add_item(parameter_tree, hf_correlation_id, parameter_tvb, CORRELATION_ID_OFFSET, CORRELATION_ID_LENGTH, NETWORK_BYTE_ORDER);
|
|
address_tvb = tvb_new_subset(parameter_tvb, ADDRESS_PARAMETER_OFFSET, address_length, address_length);
|
|
proto_item_append_text(parameter_item, " (Address: ");
|
|
dissect_parameter(address_tvb, pinfo, parameter_tree, parameter_item);
|
|
proto_item_append_text(parameter_item, ", correlation ID: %u)", tvb_get_ntohl(parameter_tvb, CORRELATION_ID_OFFSET));
|
|
}
|
|
|
|
#define ERROR_CAUSE_IND_CASUES_OFFSET (CORRELATION_ID_OFFSET + CORRELATION_ID_LENGTH)
|
|
|
|
static void
|
|
dissect_error_cause_indication_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *parameter_tree)
|
|
{
|
|
guint16 causes_length;
|
|
tvbuff_t *causes_tvb;
|
|
|
|
proto_tree_add_item(parameter_tree, hf_correlation_id, parameter_tvb, CORRELATION_ID_OFFSET, CORRELATION_ID_LENGTH, NETWORK_BYTE_ORDER);
|
|
causes_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH - CORRELATION_ID_LENGTH;
|
|
causes_tvb = tvb_new_subset(parameter_tvb, ERROR_CAUSE_IND_CASUES_OFFSET, causes_length, causes_length);
|
|
dissect_error_causes(causes_tvb, pinfo, parameter_tree);
|
|
}
|
|
|
|
static void
|
|
dissect_set_primary_address_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *parameter_tree, proto_item *parameter_item)
|
|
{
|
|
guint16 address_length;
|
|
tvbuff_t *address_tvb;
|
|
|
|
address_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH - CORRELATION_ID_LENGTH;
|
|
|
|
proto_tree_add_item(parameter_tree, hf_correlation_id, parameter_tvb, CORRELATION_ID_OFFSET, CORRELATION_ID_LENGTH, NETWORK_BYTE_ORDER);
|
|
address_tvb = tvb_new_subset(parameter_tvb, ADDRESS_PARAMETER_OFFSET, address_length, address_length);
|
|
proto_item_append_text(parameter_item, " (Address: ");
|
|
dissect_parameter(address_tvb, pinfo, parameter_tree, parameter_item);
|
|
proto_item_append_text(parameter_item, ", correlation ID: %u)", tvb_get_ntohl(parameter_tvb, CORRELATION_ID_OFFSET));
|
|
}
|
|
|
|
static void
|
|
dissect_success_report_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
|
|
{
|
|
proto_tree_add_item(parameter_tree, hf_correlation_id, parameter_tvb, CORRELATION_ID_OFFSET, CORRELATION_ID_LENGTH, NETWORK_BYTE_ORDER);
|
|
proto_item_append_text(parameter_item, " (Correlation ID: %u)", tvb_get_ntohl(parameter_tvb, CORRELATION_ID_OFFSET));
|
|
}
|
|
|
|
#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)
|
|
{
|
|
proto_tree_add_item(parameter_tree, hf_adap_indication, parameter_tvb, ADAP_INDICATION_OFFSET, ADAP_INDICATION_LENGTH, NETWORK_BYTE_ORDER);
|
|
proto_item_append_text(parameter_item, " (Indication: %u)", tvb_get_ntohl(parameter_tvb, ADAP_INDICATION_OFFSET));
|
|
}
|
|
|
|
static void
|
|
dissect_unknown_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
|
|
{
|
|
guint16 type, parameter_value_length;
|
|
|
|
type = tvb_get_ntohs(parameter_tvb, PARAMETER_TYPE_OFFSET);
|
|
parameter_value_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
|
|
|
|
if (parameter_value_length > 0)
|
|
proto_tree_add_item(parameter_tree, hf_parameter_value, parameter_tvb, PARAMETER_VALUE_OFFSET, parameter_value_length, NETWORK_BYTE_ORDER);
|
|
|
|
proto_item_append_text(parameter_item, " (Type %u, value length: %u byte%s)", type, parameter_value_length, plurality(parameter_value_length, "", "s"));
|
|
}
|
|
|
|
#define HEARTBEAT_INFO_PARAMETER_ID 0x0001
|
|
#define IPV4ADDRESS_PARAMETER_ID 0x0005
|
|
#define IPV6ADDRESS_PARAMETER_ID 0x0006
|
|
#define STATE_COOKIE_PARAMETER_ID 0x0007
|
|
#define UNREC_PARA_PARAMETER_ID 0x0008
|
|
#define COOKIE_PRESERVATIVE_PARAMETER_ID 0x0009
|
|
#define HOSTNAME_ADDRESS_PARAMETER_ID 0x000b
|
|
#define SUPPORTED_ADDRESS_TYPES_PARAMETER_ID 0x000c
|
|
#define ECN_PARAMETER_ID 0x8000
|
|
#define FORWARD_TSN_SUPPORTED_PARAMETER_ID 0xC000
|
|
#define ADD_IP_ADDRESS_PARAMETER_ID 0xC001
|
|
#define DEL_IP_ADDRESS_PARAMETER_ID 0xC002
|
|
#define ERROR_CAUSE_INDICATION_PARAMETER_ID 0xC003
|
|
#define SET_PRIMARY_ADDRESS_PARAMETER_ID 0xC004
|
|
#define SUCCESS_REPORT_PARAMETER_ID 0xC005
|
|
#define ADAP_LAYER_INDICATION_PARAMETER_ID 0xC006
|
|
|
|
static const value_string parameter_identifier_values[] = {
|
|
{ HEARTBEAT_INFO_PARAMETER_ID, "Heartbeat info" },
|
|
{ IPV4ADDRESS_PARAMETER_ID, "IPv4 address" },
|
|
{ IPV6ADDRESS_PARAMETER_ID, "IPv6 address" },
|
|
{ STATE_COOKIE_PARAMETER_ID, "State cookie" },
|
|
{ UNREC_PARA_PARAMETER_ID, "Unrecognized parameter" },
|
|
{ COOKIE_PRESERVATIVE_PARAMETER_ID, "Cookie preservative" },
|
|
{ HOSTNAME_ADDRESS_PARAMETER_ID, "Hostname address" },
|
|
{ SUPPORTED_ADDRESS_TYPES_PARAMETER_ID, "Supported address types" },
|
|
{ ECN_PARAMETER_ID, "ECN" },
|
|
{ FORWARD_TSN_SUPPORTED_PARAMETER_ID, "Forward TSN supported" },
|
|
{ ADD_IP_ADDRESS_PARAMETER_ID, "Add IP address" },
|
|
{ DEL_IP_ADDRESS_PARAMETER_ID, "Delete IP address" },
|
|
{ ERROR_CAUSE_INDICATION_PARAMETER_ID, "Error cause indication" },
|
|
{ SET_PRIMARY_ADDRESS_PARAMETER_ID, "Set primary address" },
|
|
{ SUCCESS_REPORT_PARAMETER_ID, "Success report" },
|
|
{ ADAP_LAYER_INDICATION_PARAMETER_ID, "Adaptation Layer Indication" },
|
|
{ 0, NULL } };
|
|
|
|
#define SCTP_PARAMETER_BIT_1 0x8000
|
|
#define SCTP_PARAMETER_BIT_2 0x4000
|
|
|
|
static const true_false_string sctp_parameter_bit_1_value = {
|
|
"Skip parameter and continue prosessing of the chunk",
|
|
"Stop processing of chunk"
|
|
};
|
|
|
|
static const true_false_string sctp_parameter_bit_2_value = {
|
|
"Do report",
|
|
"Do not report"
|
|
};
|
|
|
|
static void
|
|
dissect_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *chunk_tree, proto_item *additional_item)
|
|
{
|
|
guint16 type, length, padding_length;
|
|
proto_item *parameter_item;
|
|
proto_tree *parameter_tree;
|
|
proto_item *type_item;
|
|
proto_tree *type_tree;
|
|
|
|
type = tvb_get_ntohs(parameter_tvb, PARAMETER_TYPE_OFFSET);
|
|
length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
|
|
padding_length = tvb_length(parameter_tvb) - length;
|
|
|
|
parameter_item = proto_tree_add_text(chunk_tree, parameter_tvb, PARAMETER_HEADER_OFFSET, tvb_length(parameter_tvb), "%s parameter", val_to_str(type, parameter_identifier_values, "Unknown"));
|
|
parameter_tree = proto_item_add_subtree(parameter_item, ett_sctp_chunk_parameter);
|
|
|
|
type_item = proto_tree_add_item(parameter_tree, hf_parameter_type, parameter_tvb, PARAMETER_TYPE_OFFSET, PARAMETER_TYPE_LENGTH, NETWORK_BYTE_ORDER);
|
|
type_tree = proto_item_add_subtree(type_item, ett_sctp_parameter_type);
|
|
proto_tree_add_item(type_tree, hf_parameter_bit_1, parameter_tvb, PARAMETER_TYPE_OFFSET, PARAMETER_TYPE_LENGTH, NETWORK_BYTE_ORDER);
|
|
proto_tree_add_item(type_tree, hf_parameter_bit_2, parameter_tvb, PARAMETER_TYPE_OFFSET, PARAMETER_TYPE_LENGTH, NETWORK_BYTE_ORDER);
|
|
proto_tree_add_item(parameter_tree, hf_parameter_length, parameter_tvb, PARAMETER_LENGTH_OFFSET, PARAMETER_LENGTH_LENGTH, NETWORK_BYTE_ORDER);
|
|
|
|
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, additional_item);
|
|
break;
|
|
case IPV6ADDRESS_PARAMETER_ID:
|
|
dissect_ipv6_parameter(parameter_tvb, parameter_tree, parameter_item, additional_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);
|
|
break;
|
|
case COOKIE_PRESERVATIVE_PARAMETER_ID:
|
|
dissect_cookie_preservative_parameter(parameter_tvb, parameter_tree, parameter_item);
|
|
break;
|
|
case HOSTNAME_ADDRESS_PARAMETER_ID:
|
|
dissect_hostname_parameter(parameter_tvb, parameter_tree, parameter_item);
|
|
break;
|
|
case SUPPORTED_ADDRESS_TYPES_PARAMETER_ID:
|
|
dissect_supported_address_types_parameter(parameter_tvb, parameter_tree, parameter_item);
|
|
break;
|
|
case ECN_PARAMETER_ID:
|
|
dissect_ecn_parameter(parameter_tvb);
|
|
break;
|
|
case FORWARD_TSN_SUPPORTED_PARAMETER_ID:
|
|
dissect_forward_tsn_supported_parameter(parameter_tvb);
|
|
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);
|
|
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_tvb, parameter_tree, 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)
|
|
proto_tree_add_item(parameter_tree, hf_parameter_padding, parameter_tvb, PARAMETER_HEADER_OFFSET + length, padding_length, NETWORK_BYTE_ORDER);
|
|
}
|
|
|
|
static void
|
|
dissect_parameters(tvbuff_t *parameters_tvb, packet_info *pinfo, proto_tree *tree, proto_item *additional_item)
|
|
{
|
|
gint offset, length, total_length, remaining_length;
|
|
tvbuff_t *parameter_tvb;
|
|
|
|
offset = 0;
|
|
while((remaining_length = tvb_length_remaining(parameters_tvb, offset))) {
|
|
if ((offset > 0) && additional_item)
|
|
proto_item_append_text(additional_item, " ");
|
|
length = tvb_get_ntohs(parameters_tvb, offset + PARAMETER_LENGTH_OFFSET);
|
|
total_length = ADD_PADDING(length);
|
|
if (remaining_length >= length)
|
|
total_length = MIN(total_length, remaining_length);
|
|
/* create a tvb for the parameter including the padding bytes */
|
|
parameter_tvb = tvb_new_subset(parameters_tvb, offset, total_length, total_length);
|
|
dissect_parameter(parameter_tvb, pinfo, tree, additional_item);
|
|
/* get rid of the handled parameter */
|
|
offset += total_length;
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Code to handle error causes for ABORT and ERROR chunks
|
|
*/
|
|
|
|
|
|
#define CAUSE_CODE_LENGTH 2
|
|
#define CAUSE_LENGTH_LENGTH 2
|
|
#define CAUSE_HEADER_LENGTH (CAUSE_CODE_LENGTH + CAUSE_LENGTH_LENGTH)
|
|
|
|
#define CAUSE_HEADER_OFFSET 0
|
|
#define CAUSE_CODE_OFFSET CAUSE_HEADER_OFFSET
|
|
#define CAUSE_LENGTH_OFFSET (CAUSE_CODE_OFFSET + CAUSE_CODE_LENGTH)
|
|
#define CAUSE_INFO_OFFSET (CAUSE_LENGTH_OFFSET + CAUSE_LENGTH_LENGTH)
|
|
|
|
|
|
#define CAUSE_STREAM_IDENTIFIER_LENGTH 2
|
|
#define CAUSE_RESERVED_LENGTH 2
|
|
#define CAUSE_STREAM_IDENTIFIER_OFFSET CAUSE_INFO_OFFSET
|
|
#define CAUSE_RESERVED_OFFSET (CAUSE_STREAM_IDENTIFIER_OFFSET + CAUSE_STREAM_IDENTIFIER_LENGTH)
|
|
|
|
static void
|
|
dissect_invalid_stream_identifier_cause(tvbuff_t *cause_tvb, proto_tree *cause_tree, proto_item *cause_item)
|
|
{
|
|
proto_tree_add_item(cause_tree, hf_cause_stream_identifier, cause_tvb, CAUSE_STREAM_IDENTIFIER_OFFSET, CAUSE_STREAM_IDENTIFIER_LENGTH, NETWORK_BYTE_ORDER);
|
|
proto_tree_add_item(cause_tree, hf_cause_reserved, cause_tvb, CAUSE_RESERVED_OFFSET, CAUSE_RESERVED_LENGTH, NETWORK_BYTE_ORDER);
|
|
proto_item_append_text(cause_item, " (SID: %u)", tvb_get_ntohs(cause_tvb, CAUSE_STREAM_IDENTIFIER_OFFSET));
|
|
}
|
|
|
|
#define CAUSE_NUMBER_OF_MISSING_PARAMETERS_LENGTH 4
|
|
#define CAUSE_MISSING_PARAMETER_TYPE_LENGTH 2
|
|
|
|
#define CAUSE_NUMBER_OF_MISSING_PARAMETERS_OFFSET CAUSE_INFO_OFFSET
|
|
#define CAUSE_FIRST_MISSING_PARAMETER_TYPE_OFFSET (CAUSE_NUMBER_OF_MISSING_PARAMETERS_OFFSET + \
|
|
CAUSE_NUMBER_OF_MISSING_PARAMETERS_LENGTH )
|
|
|
|
static void
|
|
dissect_missing_mandatory_parameters_cause(tvbuff_t *cause_tvb, proto_tree *cause_tree)
|
|
{
|
|
guint32 number_of_missing_parameters, missing_parameter_number;
|
|
guint offset;
|
|
|
|
number_of_missing_parameters = tvb_get_ntohl(cause_tvb, CAUSE_NUMBER_OF_MISSING_PARAMETERS_OFFSET);
|
|
proto_tree_add_item(cause_tree, hf_cause_number_of_missing_parameters, cause_tvb, CAUSE_NUMBER_OF_MISSING_PARAMETERS_OFFSET, CAUSE_NUMBER_OF_MISSING_PARAMETERS_LENGTH, NETWORK_BYTE_ORDER);
|
|
offset = CAUSE_FIRST_MISSING_PARAMETER_TYPE_OFFSET;
|
|
for(missing_parameter_number = 1; missing_parameter_number <= number_of_missing_parameters; missing_parameter_number++) {
|
|
proto_tree_add_item(cause_tree, hf_cause_missing_parameter_type, cause_tvb, offset, CAUSE_MISSING_PARAMETER_TYPE_LENGTH, NETWORK_BYTE_ORDER);
|
|
offset += CAUSE_MISSING_PARAMETER_TYPE_LENGTH;
|
|
}
|
|
}
|
|
|
|
#define CAUSE_MEASURE_OF_STALENESS_LENGTH 4
|
|
#define CAUSE_MEASURE_OF_STALENESS_OFFSET CAUSE_INFO_OFFSET
|
|
|
|
static void
|
|
dissect_stale_cookie_error_cause(tvbuff_t *cause_tvb, proto_tree *cause_tree, proto_item *cause_item)
|
|
{
|
|
proto_tree_add_item(cause_tree, hf_cause_measure_of_staleness, cause_tvb, CAUSE_MEASURE_OF_STALENESS_OFFSET, CAUSE_MEASURE_OF_STALENESS_LENGTH, NETWORK_BYTE_ORDER);
|
|
proto_item_append_text(cause_item, " (Measure: %u usec)", tvb_get_ntohl(cause_tvb, CAUSE_MEASURE_OF_STALENESS_OFFSET));
|
|
}
|
|
|
|
static void
|
|
dissect_out_of_resource_cause(tvbuff_t *cause_tvb _U_)
|
|
{
|
|
}
|
|
|
|
static void
|
|
dissect_unresolvable_address_cause(tvbuff_t *cause_tvb, packet_info *pinfo, proto_tree *cause_tree, proto_item *cause_item)
|
|
{
|
|
guint16 parameter_length;
|
|
tvbuff_t *parameter_tvb;
|
|
|
|
parameter_length = tvb_get_ntohs(cause_tvb, CAUSE_LENGTH_OFFSET) - CAUSE_HEADER_LENGTH;
|
|
parameter_tvb = tvb_new_subset(cause_tvb, CAUSE_INFO_OFFSET, parameter_length, parameter_length);
|
|
proto_item_append_text(cause_item, " (Address: ");
|
|
dissect_parameter(parameter_tvb, pinfo, cause_tree, cause_item);
|
|
proto_item_append_text(cause_item, ")");
|
|
}
|
|
|
|
static void
|
|
dissect_unrecognized_chunk_type_cause(tvbuff_t *cause_tvb, packet_info *pinfo, proto_tree *cause_tree, proto_item *cause_item)
|
|
{
|
|
guint16 chunk_length;
|
|
guint8 unrecognized_type;
|
|
tvbuff_t *unrecognized_chunk_tvb;
|
|
|
|
chunk_length = tvb_get_ntohs(cause_tvb, CAUSE_LENGTH_OFFSET) - 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, FALSE);
|
|
unrecognized_type = tvb_get_guint8(unrecognized_chunk_tvb, CHUNK_TYPE_OFFSET);
|
|
proto_item_append_text(cause_item, " (Type: %u (%s))", unrecognized_type, val_to_str(unrecognized_type, chunk_type_values, "unknown"));
|
|
}
|
|
|
|
static void
|
|
dissect_invalid_mandatory_parameter_cause(tvbuff_t *cause_tvb _U_)
|
|
{
|
|
}
|
|
|
|
static void
|
|
dissect_unrecognized_parameters_cause(tvbuff_t *cause_tvb, packet_info *pinfo, proto_tree *cause_tree)
|
|
{
|
|
guint16 cause_info_length;
|
|
tvbuff_t *unrecognized_parameters_tvb;
|
|
|
|
cause_info_length = tvb_get_ntohs(cause_tvb, CAUSE_LENGTH_OFFSET) - CAUSE_HEADER_LENGTH;
|
|
|
|
unrecognized_parameters_tvb = tvb_new_subset(cause_tvb, CAUSE_INFO_OFFSET, cause_info_length, cause_info_length);
|
|
dissect_parameters(unrecognized_parameters_tvb, pinfo, cause_tree, NULL);
|
|
}
|
|
|
|
#define CAUSE_TSN_LENGTH 4
|
|
#define CAUSE_TSN_OFFSET CAUSE_INFO_OFFSET
|
|
|
|
static void
|
|
dissect_no_user_data_cause(tvbuff_t *cause_tvb, proto_tree *cause_tree, proto_item *cause_item)
|
|
{
|
|
proto_tree_add_item(cause_tree, hf_cause_tsn, cause_tvb, CAUSE_TSN_OFFSET, CAUSE_TSN_LENGTH, NETWORK_BYTE_ORDER);
|
|
proto_item_append_text(cause_item, " (TSN: %u)", tvb_get_ntohl(cause_tvb, CAUSE_TSN_OFFSET));
|
|
}
|
|
|
|
static void
|
|
dissect_cookie_received_while_shutting_down_cause(tvbuff_t *cause_tvb _U_)
|
|
{
|
|
}
|
|
|
|
static void
|
|
dissect_restart_with_new_address_cause(tvbuff_t *cause_tvb, packet_info *pinfo, proto_tree* cause_tree, proto_item *cause_item)
|
|
{
|
|
guint16 cause_info_length;
|
|
tvbuff_t *parameter_tvb;
|
|
|
|
cause_info_length = tvb_get_ntohs(cause_tvb, CAUSE_LENGTH_OFFSET) - CAUSE_HEADER_LENGTH;
|
|
parameter_tvb = tvb_new_subset(cause_tvb, CAUSE_INFO_OFFSET, cause_info_length, cause_info_length);
|
|
proto_item_append_text(cause_item, " (New addresses: ");
|
|
dissect_parameters(parameter_tvb, pinfo, cause_tree, cause_item);
|
|
proto_item_append_text(cause_item, ")");
|
|
}
|
|
|
|
static void
|
|
dissect_user_initiated_abort_cause(tvbuff_t *cause_tvb, proto_tree *cause_tree)
|
|
{
|
|
guint16 cause_info_length;
|
|
|
|
cause_info_length = tvb_get_ntohs(cause_tvb, CAUSE_LENGTH_OFFSET) - CAUSE_HEADER_LENGTH;
|
|
if (cause_info_length > 0)
|
|
proto_tree_add_item(cause_tree, hf_cause_info, cause_tvb, CAUSE_INFO_OFFSET, cause_info_length, NETWORK_BYTE_ORDER);
|
|
}
|
|
|
|
static void
|
|
dissect_protocol_violation_cause(tvbuff_t *cause_tvb, proto_tree *cause_tree)
|
|
{
|
|
guint16 cause_info_length;
|
|
|
|
cause_info_length = tvb_get_ntohs(cause_tvb, CAUSE_LENGTH_OFFSET) - CAUSE_HEADER_LENGTH;
|
|
if (cause_info_length > 0)
|
|
proto_tree_add_item(cause_tree, hf_cause_info, cause_tvb, CAUSE_INFO_OFFSET, cause_info_length, NETWORK_BYTE_ORDER);
|
|
}
|
|
|
|
static void
|
|
dissect_delete_last_address_cause(tvbuff_t *cause_tvb, packet_info *pinfo, proto_tree *cause_tree, proto_item *cause_item)
|
|
{
|
|
guint16 cause_info_length;
|
|
tvbuff_t *parameter_tvb;
|
|
|
|
cause_info_length = tvb_get_ntohs(cause_tvb, CAUSE_LENGTH_OFFSET) - CAUSE_HEADER_LENGTH;
|
|
parameter_tvb = tvb_new_subset(cause_tvb, CAUSE_INFO_OFFSET, cause_info_length, cause_info_length);
|
|
proto_item_append_text(cause_item, " (Last address: ");
|
|
dissect_parameter(parameter_tvb, pinfo, cause_tree, cause_item);
|
|
proto_item_append_text(cause_item, ")");
|
|
}
|
|
|
|
static void
|
|
dissect_resource_outage_cause(tvbuff_t *cause_tvb, packet_info *pinfo, proto_tree *cause_tree)
|
|
{
|
|
guint16 cause_info_length;
|
|
tvbuff_t *parameter_tvb;
|
|
|
|
cause_info_length = tvb_get_ntohs(cause_tvb, CAUSE_LENGTH_OFFSET) - 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, NULL);
|
|
}
|
|
|
|
static void
|
|
dissect_delete_source_address_cause(tvbuff_t *cause_tvb, packet_info *pinfo, proto_tree *cause_tree, proto_item *cause_item)
|
|
{
|
|
guint16 cause_info_length;
|
|
tvbuff_t *parameter_tvb;
|
|
|
|
cause_info_length = tvb_get_ntohs(cause_tvb, CAUSE_LENGTH_OFFSET) - CAUSE_HEADER_LENGTH;
|
|
parameter_tvb = tvb_new_subset(cause_tvb, CAUSE_INFO_OFFSET, cause_info_length, cause_info_length);
|
|
proto_item_append_text(cause_item, " (Deleted address: ");
|
|
dissect_parameter(parameter_tvb, pinfo, cause_tree, cause_item);
|
|
proto_item_append_text(cause_item, ")");
|
|
}
|
|
|
|
static void
|
|
dissect_request_refused_cause(tvbuff_t *cause_tvb, packet_info *pinfo, proto_tree *cause_tree)
|
|
{
|
|
guint16 cause_info_length;
|
|
tvbuff_t *parameter_tvb;
|
|
|
|
cause_info_length = tvb_get_ntohs(cause_tvb, CAUSE_LENGTH_OFFSET) - 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, NULL);
|
|
}
|
|
|
|
static void
|
|
dissect_unknown_cause(tvbuff_t *cause_tvb, proto_tree *cause_tree, proto_item *cause_item)
|
|
{
|
|
guint16 cause_info_length;
|
|
|
|
cause_info_length = tvb_get_ntohs(cause_tvb, CAUSE_LENGTH_OFFSET) - CAUSE_HEADER_LENGTH;
|
|
if (cause_info_length > 0)
|
|
proto_tree_add_item(cause_tree, hf_cause_info, cause_tvb, CAUSE_INFO_OFFSET, cause_info_length, NETWORK_BYTE_ORDER);
|
|
proto_item_append_text(cause_item, "Code: %u, information length: %u byte%s)", tvb_get_ntohs(cause_tvb, CAUSE_CODE_OFFSET), cause_info_length, plurality(cause_info_length, "", "s"));
|
|
}
|
|
|
|
#define INVALID_STREAM_IDENTIFIER 0x01
|
|
#define MISSING_MANDATORY_PARAMETERS 0x02
|
|
#define STALE_COOKIE_ERROR 0x03
|
|
#define OUT_OF_RESOURCE 0x04
|
|
#define UNRESOLVABLE_ADDRESS 0x05
|
|
#define UNRECOGNIZED_CHUNK_TYPE 0x06
|
|
#define INVALID_MANDATORY_PARAMETER 0x07
|
|
#define UNRECOGNIZED_PARAMETERS 0x08
|
|
#define NO_USER_DATA 0x09
|
|
#define COOKIE_RECEIVED_WHILE_SHUTTING_DOWN 0x0a
|
|
#define RESTART_WITH_NEW_ADDRESSES 0x0b
|
|
#define USER_INITIATED_ABORT 0x0c
|
|
#define PROTOCOL_VIOLATION 0x0d
|
|
#define REQUEST_TO_DELETE_LAST_ADDRESS 0x0100
|
|
#define OPERATION_REFUSED_DUE_TO_RESOURCE_SHORTAGE 0X0101
|
|
#define REQUEST_TO_DELETE_SOURCE_ADDRESS 0x0102
|
|
#define ABORT_DUE_TO_ILLEGAL_ASCONF 0x0103
|
|
#define REQUESTION_REFUSED 0x0104
|
|
|
|
static const value_string cause_code_values[] = {
|
|
{ INVALID_STREAM_IDENTIFIER, "Invalid stream identifier" },
|
|
{ MISSING_MANDATORY_PARAMETERS, "Missing mandatory parameter" },
|
|
{ STALE_COOKIE_ERROR, "Stale cookie error" },
|
|
{ OUT_OF_RESOURCE, "Out of resource" },
|
|
{ UNRESOLVABLE_ADDRESS, "Unresolvable address" },
|
|
{ UNRECOGNIZED_CHUNK_TYPE, "Unrecognized chunk type" },
|
|
{ INVALID_MANDATORY_PARAMETER, "Invalid mandatory parameter" },
|
|
{ UNRECOGNIZED_PARAMETERS, "Unrecognized parameters" },
|
|
{ NO_USER_DATA, "No user data" },
|
|
{ COOKIE_RECEIVED_WHILE_SHUTTING_DOWN, "Cookie received while shutting down" },
|
|
{ RESTART_WITH_NEW_ADDRESSES, "Restart of an association with new addresses" },
|
|
{ USER_INITIATED_ABORT, "User initiated ABORT" },
|
|
{ PROTOCOL_VIOLATION, "Protocol violation" },
|
|
{ REQUEST_TO_DELETE_LAST_ADDRESS, "Request to delete last address" },
|
|
{ OPERATION_REFUSED_DUE_TO_RESOURCE_SHORTAGE, "Operation refused due to resource shortage" },
|
|
{ REQUEST_TO_DELETE_SOURCE_ADDRESS, "Request to delete source address" },
|
|
{ ABORT_DUE_TO_ILLEGAL_ASCONF, "Association Aborted due to illegal ASCONF-ACK" },
|
|
{ REQUESTION_REFUSED, "Request refused - no authorization" },
|
|
{ 0, NULL } };
|
|
|
|
|
|
static void
|
|
dissect_error_cause(tvbuff_t *cause_tvb, packet_info *pinfo, proto_tree *chunk_tree)
|
|
{
|
|
guint16 code, length, padding_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 = tvb_length(cause_tvb) - length;
|
|
|
|
cause_item = proto_tree_add_text(chunk_tree, cause_tvb, CAUSE_HEADER_OFFSET, tvb_length(cause_tvb), "%s cause", val_to_str(code, cause_code_values, "Unknown"));
|
|
cause_tree = proto_item_add_subtree(cause_item, ett_sctp_chunk_cause);
|
|
|
|
proto_tree_add_item(cause_tree, hf_cause_code, cause_tvb, CAUSE_CODE_OFFSET, CAUSE_CODE_LENGTH, NETWORK_BYTE_ORDER);
|
|
proto_tree_add_item(cause_tree, hf_cause_length, cause_tvb, CAUSE_LENGTH_OFFSET, CAUSE_LENGTH_LENGTH, NETWORK_BYTE_ORDER);
|
|
|
|
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);
|
|
break;
|
|
case STALE_COOKIE_ERROR:
|
|
dissect_stale_cookie_error_cause(cause_tvb, cause_tree, cause_item);
|
|
break;
|
|
case OUT_OF_RESOURCE:
|
|
dissect_out_of_resource_cause(cause_tvb);
|
|
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_tvb);
|
|
break;
|
|
case UNRECOGNIZED_PARAMETERS:
|
|
dissect_unrecognized_parameters_cause(cause_tvb, pinfo, cause_tree);
|
|
break;
|
|
case NO_USER_DATA:
|
|
dissect_no_user_data_cause(cause_tvb, cause_tree, cause_item);
|
|
break;
|
|
case COOKIE_RECEIVED_WHILE_SHUTTING_DOWN:
|
|
dissect_cookie_received_while_shutting_down_cause(cause_tvb);
|
|
break;
|
|
case RESTART_WITH_NEW_ADDRESSES:
|
|
dissect_restart_with_new_address_cause(cause_tvb, pinfo, cause_tree, cause_item);
|
|
break;
|
|
case USER_INITIATED_ABORT:
|
|
dissect_user_initiated_abort_cause(cause_tvb, cause_tree);
|
|
break;
|
|
case PROTOCOL_VIOLATION:
|
|
dissect_protocol_violation_cause(cause_tvb, cause_tree);
|
|
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);
|
|
break;
|
|
case REQUEST_TO_DELETE_SOURCE_ADDRESS:
|
|
dissect_delete_source_address_cause(cause_tvb, pinfo, cause_tree, cause_item);
|
|
break;
|
|
case REQUESTION_REFUSED:
|
|
dissect_request_refused_cause(cause_tvb, pinfo, cause_tree);
|
|
break;
|
|
default:
|
|
dissect_unknown_cause(cause_tvb, cause_tree, cause_item);
|
|
break;
|
|
}
|
|
|
|
if (padding_length > 0)
|
|
proto_tree_add_item(cause_tree, hf_cause_padding, cause_tvb, CAUSE_HEADER_OFFSET + length, padding_length, NETWORK_BYTE_ORDER);
|
|
}
|
|
|
|
static void
|
|
dissect_error_causes(tvbuff_t *causes_tvb, packet_info *pinfo, proto_tree *tree)
|
|
{
|
|
gint offset, length, total_length, remaining_length;
|
|
tvbuff_t *cause_tvb;
|
|
|
|
offset = 0;
|
|
while((remaining_length = tvb_length_remaining(causes_tvb, offset))) {
|
|
length = tvb_get_ntohs(causes_tvb, offset + CAUSE_LENGTH_OFFSET);
|
|
total_length = ADD_PADDING(length);
|
|
if (remaining_length >= length)
|
|
total_length = MIN(total_length, remaining_length);
|
|
/* create a tvb for the parameter including the padding bytes */
|
|
cause_tvb = tvb_new_subset(causes_tvb, offset, total_length, total_length);
|
|
dissect_error_cause(cause_tvb, pinfo, tree);
|
|
/* get rid of the handled cause */
|
|
offset += total_length;
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Code to actually dissect the packets
|
|
*/
|
|
|
|
static gboolean try_heuristic_first = FALSE;
|
|
|
|
static gboolean
|
|
dissect_payload(tvbuff_t *payload_tvb, packet_info *pinfo, proto_tree *tree, guint32 ppi)
|
|
{
|
|
guint32 low_port, high_port;
|
|
|
|
if (try_heuristic_first) {
|
|
/* do lookup with the heuristic subdissector table */
|
|
if (dissector_try_heuristic(sctp_heur_subdissector_list, payload_tvb, pinfo, tree))
|
|
return TRUE;
|
|
}
|
|
|
|
/* Do lookups with the subdissector table.
|
|
|
|
When trying port numbers, we try the port number with the lower value
|
|
first, followed by the port number with the higher value. This means
|
|
that, for packets where a dissector is registered for *both* port
|
|
numbers, and where there's no match on the PPI:
|
|
|
|
1) we pick the same dissector for traffic going in both directions;
|
|
|
|
2) we prefer the port number that's more likely to be the right
|
|
one (as that prefers well-known ports to reserved ports);
|
|
|
|
although there is, of course, no guarantee that any such strategy
|
|
will always pick the right port number.
|
|
|
|
XXX - we ignore port numbers of 0, as some dissectors use a port
|
|
number of 0 to disable the port. */
|
|
if (dissector_try_port(sctp_ppi_dissector_table, ppi, payload_tvb, pinfo, tree))
|
|
return TRUE;
|
|
if (pinfo->srcport > pinfo->destport) {
|
|
low_port = pinfo->destport;
|
|
high_port = pinfo->srcport;
|
|
} else {
|
|
low_port = pinfo->srcport;
|
|
high_port = pinfo->destport;
|
|
}
|
|
if (low_port != 0 &&
|
|
dissector_try_port(sctp_port_dissector_table, low_port, payload_tvb, pinfo, tree))
|
|
return TRUE;
|
|
if (high_port != 0 &&
|
|
dissector_try_port(sctp_port_dissector_table, high_port, payload_tvb, pinfo, tree))
|
|
return TRUE;
|
|
|
|
if (!try_heuristic_first) {
|
|
/* do lookup with the heuristic subdissector table */
|
|
if (dissector_try_heuristic(sctp_heur_subdissector_list, payload_tvb, pinfo, tree))
|
|
return TRUE;
|
|
}
|
|
|
|
/* Oh, well, we don't know this; dissect it as data. */
|
|
call_dissector(data_handle, payload_tvb, pinfo, tree);
|
|
return TRUE;
|
|
}
|
|
|
|
#define DATA_CHUNK_TSN_LENGTH 4
|
|
#define DATA_CHUNK_STREAM_ID_LENGTH 2
|
|
#define DATA_CHUNK_STREAM_SEQ_NUMBER_LENGTH 2
|
|
#define DATA_CHUNK_PAYLOAD_PROTOCOL_ID_LENGTH 4
|
|
|
|
#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
|
|
|
|
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 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)
|
|
{
|
|
guint16 payload_length;
|
|
guint32 payload_proto_id;
|
|
tvbuff_t *payload_tvb;
|
|
proto_tree *flags_tree;
|
|
guint8 e_bit, b_bit, u_bit;
|
|
|
|
payload_proto_id = tvb_get_ntohl(chunk_tvb, DATA_CHUNK_PAYLOAD_PROTOCOL_ID_OFFSET);
|
|
|
|
if (chunk_tree) {
|
|
proto_item_set_len(chunk_item, DATA_CHUNK_HEADER_LENGTH);
|
|
flags_tree = proto_item_add_subtree(flags_item, ett_sctp_data_chunk_flags);
|
|
proto_tree_add_item(flags_tree, hf_data_chunk_e_bit, chunk_tvb, CHUNK_FLAGS_OFFSET, CHUNK_FLAGS_LENGTH, NETWORK_BYTE_ORDER);
|
|
proto_tree_add_item(flags_tree, hf_data_chunk_b_bit, chunk_tvb, CHUNK_FLAGS_OFFSET, CHUNK_FLAGS_LENGTH, NETWORK_BYTE_ORDER);
|
|
proto_tree_add_item(flags_tree, hf_data_chunk_u_bit, chunk_tvb, CHUNK_FLAGS_OFFSET, CHUNK_FLAGS_LENGTH, NETWORK_BYTE_ORDER);
|
|
proto_tree_add_item(chunk_tree, hf_data_chunk_tsn, chunk_tvb, DATA_CHUNK_TSN_OFFSET, DATA_CHUNK_TSN_LENGTH, NETWORK_BYTE_ORDER);
|
|
proto_tree_add_item(chunk_tree, hf_data_chunk_stream_id, chunk_tvb, DATA_CHUNK_STREAM_ID_OFFSET, DATA_CHUNK_STREAM_ID_LENGTH, NETWORK_BYTE_ORDER);
|
|
proto_tree_add_item(chunk_tree, hf_data_chunk_stream_seq_number, chunk_tvb, DATA_CHUNK_STREAM_SEQ_NUMBER_OFFSET, DATA_CHUNK_STREAM_SEQ_NUMBER_LENGTH, NETWORK_BYTE_ORDER);
|
|
proto_tree_add_item(chunk_tree, hf_data_chunk_payload_proto_id, chunk_tvb, DATA_CHUNK_PAYLOAD_PROTOCOL_ID_OFFSET, DATA_CHUNK_PAYLOAD_PROTOCOL_ID_LENGTH, NETWORK_BYTE_ORDER);
|
|
|
|
e_bit = tvb_get_guint8(chunk_tvb, CHUNK_FLAGS_OFFSET) & SCTP_DATA_CHUNK_E_BIT;
|
|
b_bit = tvb_get_guint8(chunk_tvb, CHUNK_FLAGS_OFFSET) & SCTP_DATA_CHUNK_B_BIT;
|
|
u_bit = tvb_get_guint8(chunk_tvb, CHUNK_FLAGS_OFFSET) & SCTP_DATA_CHUNK_U_BIT;
|
|
|
|
proto_item_append_text(chunk_item, "(%s, ", (u_bit) ? "unordered" : "ordered");
|
|
if (b_bit) {
|
|
if (e_bit)
|
|
proto_item_append_text(chunk_item, "complete");
|
|
else
|
|
proto_item_append_text(chunk_item, "first");
|
|
} else {
|
|
if (e_bit)
|
|
proto_item_append_text(chunk_item, "last");
|
|
else
|
|
proto_item_append_text(chunk_item, "middle");
|
|
}
|
|
|
|
proto_item_append_text(chunk_item, " segment, TSN: %u, SID: %u, SSN: %u, PPID: %u",
|
|
tvb_get_ntohl(chunk_tvb, DATA_CHUNK_TSN_OFFSET),
|
|
tvb_get_ntohs(chunk_tvb, DATA_CHUNK_STREAM_ID_OFFSET),
|
|
tvb_get_ntohs(chunk_tvb, DATA_CHUNK_STREAM_SEQ_NUMBER_OFFSET),
|
|
payload_proto_id);
|
|
}
|
|
payload_length = tvb_get_ntohs(chunk_tvb, CHUNK_LENGTH_OFFSET);
|
|
if (payload_length < DATA_CHUNK_HEADER_LENGTH) {
|
|
if (chunk_tree) {
|
|
proto_item_append_text(chunk_item, ", bogus chunk length %u < %u)",
|
|
payload_length, DATA_CHUNK_HEADER_LENGTH);
|
|
}
|
|
return TRUE;
|
|
}
|
|
payload_length -= DATA_CHUNK_HEADER_LENGTH;
|
|
if (chunk_tree) {
|
|
proto_item_append_text(chunk_item, ", payload length: %u byte%s)",
|
|
payload_length, plurality(payload_length, "", "s"));
|
|
}
|
|
payload_tvb = tvb_new_subset(chunk_tvb, DATA_CHUNK_PAYLOAD_OFFSET, payload_length, payload_length);
|
|
return dissect_payload(payload_tvb, pinfo, tree, payload_proto_id);
|
|
}
|
|
|
|
#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_FIXED_PARAMTERS_LENGTH (INIT_CHUNK_INITIATE_TAG_LENGTH + \
|
|
INIT_CHUNK_ADV_REC_WINDOW_CREDIT_LENGTH + \
|
|
INIT_CHUNK_NUMBER_OF_OUTBOUND_STREAMS_LENGTH + \
|
|
INIT_CHUNK_NUMBER_OF_INBOUND_STREAMS_LENGTH + \
|
|
INIT_CHUNK_INITIAL_TSN_LENGTH)
|
|
|
|
#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 )
|
|
|
|
static void
|
|
dissect_init_chunk(tvbuff_t *chunk_tvb, packet_info *pinfo, proto_tree *chunk_tree, proto_item *chunk_item)
|
|
{
|
|
gint parameters_length;
|
|
tvbuff_t *parameters_tvb;
|
|
|
|
if (chunk_tree) {
|
|
/* handle fixed parameters */
|
|
proto_tree_add_item(chunk_tree, hf_init_chunk_initiate_tag, chunk_tvb, INIT_CHUNK_INITIATE_TAG_OFFSET, INIT_CHUNK_INITIATE_TAG_LENGTH, NETWORK_BYTE_ORDER);
|
|
proto_tree_add_item(chunk_tree, hf_init_chunk_adv_rec_window_credit, chunk_tvb, INIT_CHUNK_ADV_REC_WINDOW_CREDIT_OFFSET, INIT_CHUNK_ADV_REC_WINDOW_CREDIT_LENGTH, NETWORK_BYTE_ORDER);
|
|
proto_tree_add_item(chunk_tree, hf_init_chunk_number_of_outbound_streams, chunk_tvb, INIT_CHUNK_NUMBER_OF_OUTBOUND_STREAMS_OFFSET, INIT_CHUNK_NUMBER_OF_OUTBOUND_STREAMS_LENGTH, NETWORK_BYTE_ORDER);
|
|
proto_tree_add_item(chunk_tree, hf_init_chunk_number_of_inbound_streams, chunk_tvb, INIT_CHUNK_NUMBER_OF_INBOUND_STREAMS_OFFSET, INIT_CHUNK_NUMBER_OF_INBOUND_STREAMS_LENGTH, NETWORK_BYTE_ORDER);
|
|
proto_tree_add_item(chunk_tree, hf_init_chunk_initial_tsn, chunk_tvb, INIT_CHUNK_INITIAL_TSN_OFFSET, INIT_CHUNK_INITIAL_TSN_LENGTH, NETWORK_BYTE_ORDER);
|
|
|
|
/* handle variable paramters */
|
|
parameters_length = tvb_get_ntohs(chunk_tvb, CHUNK_LENGTH_OFFSET) - INIT_CHUNK_FIXED_PARAMTERS_LENGTH - CHUNK_HEADER_LENGTH;
|
|
parameters_tvb = tvb_new_subset(chunk_tvb, INIT_CHUNK_VARIABLE_LENGTH_PARAMETER_OFFSET, parameters_length, parameters_length);
|
|
dissect_parameters(parameters_tvb, pinfo, chunk_tree, NULL);
|
|
|
|
proto_item_append_text(chunk_item, " (Outbound streams: %u, inbound streams: %u)",
|
|
tvb_get_ntohs(chunk_tvb, INIT_CHUNK_NUMBER_OF_OUTBOUND_STREAMS_OFFSET),
|
|
tvb_get_ntohs(chunk_tvb, INIT_CHUNK_NUMBER_OF_INBOUND_STREAMS_OFFSET));
|
|
}
|
|
}
|
|
|
|
static void
|
|
dissect_init_ack_chunk(tvbuff_t *chunk_tvb, packet_info *pinfo, proto_tree *chunk_tree, proto_item *chunk_item)
|
|
{
|
|
gint parameters_length;
|
|
tvbuff_t *parameters_tvb;
|
|
|
|
if (chunk_tree) {
|
|
/* handle fixed parameters */
|
|
proto_tree_add_item(chunk_tree, hf_initack_chunk_initiate_tag, chunk_tvb, INIT_CHUNK_INITIATE_TAG_OFFSET, INIT_CHUNK_INITIATE_TAG_LENGTH, NETWORK_BYTE_ORDER);
|
|
proto_tree_add_item(chunk_tree, hf_initack_chunk_adv_rec_window_credit, chunk_tvb, INIT_CHUNK_ADV_REC_WINDOW_CREDIT_OFFSET, INIT_CHUNK_ADV_REC_WINDOW_CREDIT_LENGTH, NETWORK_BYTE_ORDER);
|
|
proto_tree_add_item(chunk_tree, hf_initack_chunk_number_of_outbound_streams, chunk_tvb, INIT_CHUNK_NUMBER_OF_OUTBOUND_STREAMS_OFFSET, INIT_CHUNK_NUMBER_OF_OUTBOUND_STREAMS_LENGTH, NETWORK_BYTE_ORDER);
|
|
proto_tree_add_item(chunk_tree, hf_initack_chunk_number_of_inbound_streams, chunk_tvb, INIT_CHUNK_NUMBER_OF_INBOUND_STREAMS_OFFSET, INIT_CHUNK_NUMBER_OF_INBOUND_STREAMS_LENGTH, NETWORK_BYTE_ORDER);
|
|
proto_tree_add_item(chunk_tree, hf_initack_chunk_initial_tsn, chunk_tvb, INIT_CHUNK_INITIAL_TSN_OFFSET, INIT_CHUNK_INITIAL_TSN_LENGTH, NETWORK_BYTE_ORDER);
|
|
|
|
/* handle variable paramters */
|
|
parameters_length = tvb_get_ntohs(chunk_tvb, CHUNK_LENGTH_OFFSET) - INIT_CHUNK_FIXED_PARAMTERS_LENGTH - CHUNK_HEADER_LENGTH;
|
|
parameters_tvb = tvb_new_subset(chunk_tvb, INIT_CHUNK_VARIABLE_LENGTH_PARAMETER_OFFSET, parameters_length, parameters_length);
|
|
dissect_parameters(parameters_tvb, pinfo, chunk_tree, NULL);
|
|
|
|
proto_item_append_text(chunk_item, " (Outbound streams: %u, inbound streams: %u)",
|
|
tvb_get_ntohs(chunk_tvb, INIT_CHUNK_NUMBER_OF_OUTBOUND_STREAMS_OFFSET),
|
|
tvb_get_ntohs(chunk_tvb, INIT_CHUNK_NUMBER_OF_INBOUND_STREAMS_OFFSET));
|
|
}
|
|
}
|
|
|
|
#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)
|
|
|
|
|
|
static void
|
|
dissect_sack_chunk(tvbuff_t *chunk_tvb, proto_tree *chunk_tree, proto_item *chunk_item)
|
|
{
|
|
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;
|
|
guint32 cum_tsn_ack;
|
|
proto_item *block_item;
|
|
proto_tree *block_tree;
|
|
|
|
if (chunk_tree) {
|
|
proto_tree_add_item(chunk_tree, hf_sack_chunk_cumulative_tsn_ack, chunk_tvb, SACK_CHUNK_CUMULATIVE_TSN_ACK_OFFSET, SACK_CHUNK_CUMULATIVE_TSN_ACK_LENGTH, NETWORK_BYTE_ORDER);
|
|
proto_tree_add_item(chunk_tree, hf_sack_chunk_adv_rec_window_credit, chunk_tvb, SACK_CHUNK_ADV_REC_WINDOW_CREDIT_OFFSET, SACK_CHUNK_ADV_REC_WINDOW_CREDIT_LENGTH, NETWORK_BYTE_ORDER);
|
|
proto_tree_add_item(chunk_tree, hf_sack_chunk_number_of_gap_blocks, chunk_tvb, SACK_CHUNK_NUMBER_OF_GAP_BLOCKS_OFFSET, SACK_CHUNK_NUMBER_OF_GAP_BLOCKS_LENGTH, NETWORK_BYTE_ORDER);
|
|
proto_tree_add_item(chunk_tree, hf_sack_chunk_number_of_dup_tsns, chunk_tvb, SACK_CHUNK_NUMBER_OF_DUP_TSNS_OFFSET, SACK_CHUNK_NUMBER_OF_DUP_TSNS_LENGTH, NETWORK_BYTE_ORDER);
|
|
|
|
/* handle the gap acknowledgement blocks */
|
|
number_of_gap_blocks = tvb_get_ntohs(chunk_tvb, SACK_CHUNK_NUMBER_OF_GAP_BLOCKS_OFFSET);
|
|
gap_block_offset = SACK_CHUNK_GAP_BLOCK_OFFSET;
|
|
cum_tsn_ack = tvb_get_ntohl(chunk_tvb, SACK_CHUNK_CUMULATIVE_TSN_ACK_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 TSN %u to %u", cum_tsn_ack + start, cum_tsn_ack + end);
|
|
block_tree = proto_item_add_subtree(block_item, ett_sctp_sack_chunk_gap_block);
|
|
proto_tree_add_item(block_tree, hf_sack_chunk_gap_block_start, chunk_tvb, gap_block_offset, SACK_CHUNK_GAP_BLOCK_START_LENGTH, NETWORK_BYTE_ORDER);
|
|
proto_tree_add_item(block_tree, hf_sack_chunk_gap_block_end, chunk_tvb, gap_block_offset + SACK_CHUNK_GAP_BLOCK_START_LENGTH, SACK_CHUNK_GAP_BLOCK_END_LENGTH, NETWORK_BYTE_ORDER);
|
|
gap_block_offset += SACK_CHUNK_GAP_BLOCK_LENGTH;
|
|
}
|
|
|
|
/* handle the duplicate TSNs */
|
|
number_of_dup_tsns = tvb_get_ntohs(chunk_tvb, SACK_CHUNK_NUMBER_OF_DUP_TSNS_OFFSET);
|
|
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++) {
|
|
proto_tree_add_item(chunk_tree, hf_sack_chunk_duplicate_tsn, chunk_tvb, dup_tsn_offset, SACK_CHUNK_DUP_TSN_LENGTH, NETWORK_BYTE_ORDER);
|
|
dup_tsn_offset += SACK_CHUNK_DUP_TSN_LENGTH;
|
|
}
|
|
|
|
proto_item_append_text(chunk_item, " (Cumulative TSN: %u, a_rwnd: %u, gaps: %u, duplicate TSNs: %u)",
|
|
tvb_get_ntohl(chunk_tvb, SACK_CHUNK_CUMULATIVE_TSN_ACK_OFFSET),
|
|
tvb_get_ntohl(chunk_tvb, SACK_CHUNK_ADV_REC_WINDOW_CREDIT_OFFSET),
|
|
number_of_gap_blocks, number_of_dup_tsns);
|
|
}
|
|
}
|
|
|
|
#define HEARTBEAT_CHUNK_INFO_OFFSET CHUNK_VALUE_OFFSET
|
|
|
|
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 info_length;
|
|
|
|
if (chunk_tree) {
|
|
info_length = tvb_get_ntohs(chunk_tvb, CHUNK_LENGTH_OFFSET) - CHUNK_HEADER_LENGTH;
|
|
proto_item_append_text(chunk_item, " (Information: %u byte%s)", info_length, plurality(info_length, "", "s"));
|
|
parameter_tvb = tvb_new_subset(chunk_tvb, HEARTBEAT_CHUNK_INFO_OFFSET, info_length, info_length);
|
|
/* FIXME: Parameters or parameter? */
|
|
dissect_parameter(parameter_tvb, pinfo, chunk_tree, NULL);
|
|
}
|
|
}
|
|
|
|
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 info_length;
|
|
|
|
if (chunk_tree) {
|
|
info_length = tvb_get_ntohs(chunk_tvb, CHUNK_LENGTH_OFFSET) - CHUNK_HEADER_LENGTH;
|
|
proto_item_append_text(chunk_item, " (Information: %u byte%s)", info_length, plurality(info_length, "", "s"));
|
|
parameter_tvb = tvb_new_subset(chunk_tvb, HEARTBEAT_CHUNK_INFO_OFFSET, info_length, info_length);
|
|
/* FIXME: Parameters or parameter? */
|
|
dissect_parameter(parameter_tvb, pinfo, chunk_tree, NULL);
|
|
}
|
|
}
|
|
#define ABORT_CHUNK_FIRST_ERROR_CAUSE_OFFSET 4
|
|
|
|
static void
|
|
dissect_abort_chunk(tvbuff_t *chunk_tvb, packet_info *pinfo, proto_tree *chunk_tree, proto_item *flags_item)
|
|
{
|
|
guint16 causes_length;
|
|
tvbuff_t *causes_tvb;
|
|
proto_tree *flags_tree;
|
|
|
|
if (chunk_tree) {
|
|
flags_tree = proto_item_add_subtree(flags_item, ett_sctp_abort_chunk_flags);
|
|
proto_tree_add_item(flags_tree, hf_abort_chunk_t_bit, chunk_tvb, CHUNK_FLAGS_OFFSET, CHUNK_FLAGS_LENGTH, NETWORK_BYTE_ORDER);
|
|
|
|
causes_length = tvb_get_ntohs(chunk_tvb, CHUNK_LENGTH_OFFSET) - CHUNK_HEADER_LENGTH;
|
|
causes_tvb = tvb_new_subset(chunk_tvb, CHUNK_VALUE_OFFSET, causes_length, causes_length);
|
|
dissect_error_causes(causes_tvb, pinfo, chunk_tree);
|
|
}
|
|
}
|
|
|
|
#define SHUTDOWN_CHUNK_CUMULATIVE_TSN_ACK_OFFSET CHUNK_VALUE_OFFSET
|
|
#define SHUTDOWN_CHUNK_CUMULATIVE_TSN_ACK_LENGTH 4
|
|
|
|
static void
|
|
dissect_shutdown_chunk(tvbuff_t *chunk_tvb, proto_tree *chunk_tree, proto_item *chunk_item)
|
|
{
|
|
if (chunk_tree) {
|
|
proto_tree_add_item(chunk_tree, hf_shutdown_chunk_cumulative_tsn_ack, chunk_tvb, SHUTDOWN_CHUNK_CUMULATIVE_TSN_ACK_OFFSET, SHUTDOWN_CHUNK_CUMULATIVE_TSN_ACK_LENGTH, NETWORK_BYTE_ORDER);
|
|
proto_item_append_text(chunk_item, " (Cumulative TSN ack: %u)", tvb_get_ntohl(chunk_tvb, SHUTDOWN_CHUNK_CUMULATIVE_TSN_ACK_OFFSET));
|
|
}
|
|
}
|
|
|
|
static void
|
|
dissect_shutdown_ack_chunk(tvbuff_t *chunk_tvb _U_)
|
|
{
|
|
}
|
|
|
|
#define ERROR_CAUSE_IND_CAUSES_OFFSET CHUNK_VALUE_OFFSET
|
|
|
|
static void
|
|
dissect_error_chunk(tvbuff_t *chunk_tvb, packet_info *pinfo, proto_tree *chunk_tree)
|
|
{
|
|
guint16 causes_length;
|
|
tvbuff_t *causes_tvb;
|
|
|
|
if (chunk_tree) {
|
|
causes_length = tvb_get_ntohs(chunk_tvb, CHUNK_LENGTH_OFFSET) - CHUNK_HEADER_LENGTH;
|
|
causes_tvb = tvb_new_subset(chunk_tvb, ERROR_CAUSE_IND_CAUSES_OFFSET, causes_length, causes_length);
|
|
dissect_error_causes(causes_tvb, pinfo, chunk_tree);
|
|
}
|
|
}
|
|
|
|
#define COOKIE_OFFSET CHUNK_VALUE_OFFSET
|
|
|
|
static void
|
|
dissect_cookie_echo_chunk(tvbuff_t *chunk_tvb, proto_tree *chunk_tree, proto_item *chunk_item)
|
|
{
|
|
guint cookie_length;
|
|
|
|
if (chunk_tree) {
|
|
cookie_length = tvb_get_ntohs(chunk_tvb, CHUNK_LENGTH_OFFSET) - CHUNK_HEADER_LENGTH;
|
|
proto_tree_add_item(chunk_tree, hf_cookie, chunk_tvb, COOKIE_OFFSET, cookie_length, NETWORK_BYTE_ORDER);
|
|
proto_item_append_text(chunk_item, " (Cookie length: %u byte%s)", cookie_length, plurality(cookie_length, "", "s"));
|
|
}
|
|
}
|
|
|
|
static void
|
|
dissect_cookie_ack_chunk(tvbuff_t *chunk_tvb _U_)
|
|
{
|
|
}
|
|
|
|
#define ECNE_CHUNK_LOWEST_TSN_OFFSET CHUNK_VALUE_OFFSET
|
|
#define ECNE_CHUNK_LOWEST_TSN_LENGTH 4
|
|
|
|
static void
|
|
dissect_ecne_chunk(tvbuff_t *chunk_tvb, proto_tree *chunk_tree, proto_item *chunk_item)
|
|
{
|
|
if (chunk_tree)
|
|
proto_tree_add_item(chunk_tree, hf_ecne_chunk_lowest_tsn, chunk_tvb, ECNE_CHUNK_LOWEST_TSN_OFFSET, ECNE_CHUNK_LOWEST_TSN_LENGTH, NETWORK_BYTE_ORDER);
|
|
proto_item_append_text(chunk_item, " (Lowest TSN: %u)", tvb_get_ntohl(chunk_tvb, ECNE_CHUNK_LOWEST_TSN_OFFSET));
|
|
}
|
|
|
|
#define CWR_CHUNK_LOWEST_TSN_OFFSET CHUNK_VALUE_OFFSET
|
|
#define CWR_CHUNK_LOWEST_TSN_LENGTH 4
|
|
|
|
static void
|
|
dissect_cwr_chunk(tvbuff_t *chunk_tvb, proto_tree *chunk_tree, proto_item *chunk_item)
|
|
{
|
|
if (chunk_tree)
|
|
proto_tree_add_item(chunk_tree, hf_cwr_chunk_lowest_tsn, chunk_tvb, CWR_CHUNK_LOWEST_TSN_OFFSET, CWR_CHUNK_LOWEST_TSN_LENGTH, NETWORK_BYTE_ORDER);
|
|
proto_item_append_text(chunk_item, " (Lowest TSN: %u)", tvb_get_ntohl(chunk_tvb, CWR_CHUNK_LOWEST_TSN_OFFSET));
|
|
}
|
|
|
|
#define SCTP_SHUTDOWN_COMPLETE_CHUNK_T_BIT 0x01
|
|
|
|
|
|
static const true_false_string sctp_shutdown_complete_chunk_t_bit_value = {
|
|
"No TCB destroyed",
|
|
"TCB destroyed"
|
|
};
|
|
|
|
|
|
static void
|
|
dissect_shutdown_complete_chunk(tvbuff_t *chunk_tvb, proto_tree *chunk_tree, proto_item *flags_item)
|
|
{
|
|
proto_tree *flags_tree;
|
|
|
|
if (chunk_tree) {
|
|
flags_tree = proto_item_add_subtree(flags_item, ett_sctp_shutdown_complete_chunk_flags);
|
|
proto_tree_add_item(flags_tree, hf_shutdown_complete_chunk_t_bit, chunk_tvb, CHUNK_FLAGS_OFFSET, CHUNK_FLAGS_LENGTH, NETWORK_BYTE_ORDER);
|
|
}
|
|
}
|
|
|
|
#define FORWARD_TSN_CHUNK_TSN_LENGTH 4
|
|
#define FORWARD_TSN_CHUNK_SID_LENGTH 2
|
|
#define FORWARD_TSN_CHUNK_SSN_LENGTH 2
|
|
#define FORWARD_TSN_CHUNK_TSN_OFFSET CHUNK_VALUE_OFFSET
|
|
#define FORWARD_TSN_CHUNK_SID_OFFSET 0
|
|
#define FORWARD_TSN_CHUNK_SSN_OFFSET (FORWARD_TSN_CHUNK_SID_OFFSET + FORWARD_TSN_CHUNK_SID_LENGTH)
|
|
|
|
static void
|
|
dissect_forward_tsn_chunk(tvbuff_t *chunk_tvb, proto_tree *chunk_tree, proto_item *chunk_item)
|
|
{
|
|
guint offset;
|
|
guint16 number_of_affected_streams, affected_stream, length;
|
|
|
|
if (chunk_tree) {
|
|
proto_tree_add_item(chunk_tree, hf_forward_tsn_chunk_tsn, chunk_tvb, FORWARD_TSN_CHUNK_TSN_OFFSET, FORWARD_TSN_CHUNK_TSN_LENGTH, NETWORK_BYTE_ORDER);
|
|
length = tvb_get_ntohs(chunk_tvb, CHUNK_LENGTH_OFFSET);
|
|
number_of_affected_streams = (length - CHUNK_HEADER_LENGTH - FORWARD_TSN_CHUNK_TSN_LENGTH) /
|
|
(FORWARD_TSN_CHUNK_SID_LENGTH + FORWARD_TSN_CHUNK_SSN_LENGTH);
|
|
offset = CHUNK_VALUE_OFFSET + FORWARD_TSN_CHUNK_TSN_LENGTH;
|
|
|
|
for(affected_stream = 0; affected_stream < number_of_affected_streams; affected_stream++) {
|
|
proto_tree_add_item(chunk_tree, hf_forward_tsn_chunk_sid, chunk_tvb, offset + FORWARD_TSN_CHUNK_SID_OFFSET, FORWARD_TSN_CHUNK_SID_LENGTH, NETWORK_BYTE_ORDER);
|
|
proto_tree_add_item(chunk_tree, hf_forward_tsn_chunk_ssn, chunk_tvb, offset + FORWARD_TSN_CHUNK_SSN_OFFSET, FORWARD_TSN_CHUNK_SSN_LENGTH, NETWORK_BYTE_ORDER);
|
|
offset = offset + (FORWARD_TSN_CHUNK_SID_LENGTH + FORWARD_TSN_CHUNK_SSN_LENGTH);
|
|
}
|
|
proto_item_append_text(chunk_item, "(Cumulative TSN: %u)", tvb_get_ntohl(chunk_tvb, FORWARD_TSN_CHUNK_TSN_OFFSET));
|
|
}
|
|
}
|
|
|
|
#define SERIAL_NUMBER_LENGTH 4
|
|
#define SERIAL_NUMBER_OFFSET PARAMETER_VALUE_OFFSET
|
|
#define ASCONF_CHUNK_PARAMETERS_OFFSET (SERIAL_NUMBER_OFFSET + SERIAL_NUMBER_LENGTH)
|
|
|
|
static void
|
|
dissect_asconf_chunk(tvbuff_t *chunk_tvb, packet_info *pinfo, proto_tree *chunk_tree)
|
|
{
|
|
guint parameters_length;
|
|
tvbuff_t *parameters_tvb;
|
|
|
|
if (chunk_tree) {
|
|
proto_tree_add_item(chunk_tree, hf_asconf_serial, chunk_tvb, SERIAL_NUMBER_OFFSET, SERIAL_NUMBER_LENGTH, NETWORK_BYTE_ORDER);
|
|
parameters_length = tvb_get_ntohs(chunk_tvb, CHUNK_LENGTH_OFFSET) - CHUNK_HEADER_LENGTH - SERIAL_NUMBER_LENGTH;
|
|
parameters_tvb = tvb_new_subset(chunk_tvb, ASCONF_CHUNK_PARAMETERS_OFFSET, parameters_length, parameters_length);
|
|
dissect_parameters(parameters_tvb, pinfo, chunk_tree, NULL);
|
|
}
|
|
}
|
|
|
|
#define ASCONF_ACK_CHUNK_PARAMETERS_OFFSET (SERIAL_NUMBER_OFFSET + SERIAL_NUMBER_LENGTH)
|
|
|
|
static void
|
|
dissect_asconf_ack_chunk(tvbuff_t *chunk_tvb, packet_info *pinfo, proto_tree *chunk_tree)
|
|
{
|
|
guint parameters_length;
|
|
tvbuff_t *parameters_tvb;
|
|
|
|
if (chunk_tree) {
|
|
proto_tree_add_item(chunk_tree, hf_asconf_ack_serial, chunk_tvb, SERIAL_NUMBER_OFFSET, SERIAL_NUMBER_LENGTH, NETWORK_BYTE_ORDER);
|
|
parameters_length = tvb_get_ntohs(chunk_tvb, CHUNK_LENGTH_OFFSET) - CHUNK_HEADER_LENGTH - SERIAL_NUMBER_LENGTH;
|
|
parameters_tvb = tvb_new_subset(chunk_tvb, ASCONF_ACK_CHUNK_PARAMETERS_OFFSET, parameters_length, parameters_length);
|
|
dissect_parameters(parameters_tvb, pinfo, chunk_tree, NULL);
|
|
}
|
|
}
|
|
|
|
#define PKTDROP_CHUNK_BANDWIDTH_LENGTH 4
|
|
#define PKTDROP_CHUNK_QUEUESIZE_LENGTH 4
|
|
#define PKTDROP_CHUNK_TRUNCATED_SIZE_LENGTH 2
|
|
#define PKTDROP_CHUNK_RESERVED_SIZE_LENGTH 2
|
|
|
|
#define PKTDROP_CHUNK_HEADER_LENGTH (CHUNK_HEADER_LENGTH + \
|
|
PKTDROP_CHUNK_BANDWIDTH_LENGTH + \
|
|
PKTDROP_CHUNK_QUEUESIZE_LENGTH + \
|
|
PKTDROP_CHUNK_TRUNCATED_SIZE_LENGTH + \
|
|
PKTDROP_CHUNK_RESERVED_SIZE_LENGTH)
|
|
|
|
#define PKTDROP_CHUNK_BANDWIDTH_OFFSET CHUNK_VALUE_OFFSET
|
|
#define PKTDROP_CHUNK_QUEUESIZE_OFFSET (PKTDROP_CHUNK_BANDWIDTH_OFFSET + PKTDROP_CHUNK_BANDWIDTH_LENGTH)
|
|
#define PKTDROP_CHUNK_TRUNCATED_SIZE_OFFSET (PKTDROP_CHUNK_QUEUESIZE_OFFSET + PKTDROP_CHUNK_QUEUESIZE_LENGTH)
|
|
#define PKTDROP_CHUNK_RESERVED_SIZE_OFFSET (PKTDROP_CHUNK_TRUNCATED_SIZE_OFFSET + PKTDROP_CHUNK_TRUNCATED_SIZE_LENGTH)
|
|
#define PKTDROP_CHUNK_DATA_FIELD_OFFSET (PKTDROP_CHUNK_RESERVED_SIZE_OFFSET + PKTDROP_CHUNK_RESERVED_SIZE_LENGTH)
|
|
|
|
#define SCTP_PKTDROP_CHUNK_M_BIT 0x01
|
|
/*
|
|
#define SCTP_PKTDROP_CHUNK_S_BIT 0x02
|
|
*/
|
|
#define SCTP_PKTDROP_CHUNK_B_BIT 0x04
|
|
#define SCTP_PKTDROP_CHUNK_T_BIT 0x08
|
|
|
|
static const true_false_string sctp_pktdropk_m_bit_value = {
|
|
"Source is a middlebox",
|
|
"Source is an endhost"
|
|
};
|
|
|
|
/*
|
|
static const true_false_string sctp_pktdropk_s_bit_value = {
|
|
"This is a summary",
|
|
"This is not a summary"
|
|
};
|
|
*/
|
|
|
|
static const true_false_string sctp_pktdropk_b_bit_value = {
|
|
"SCTP checksum was incorrect",
|
|
"SCTP checksum was correct"
|
|
};
|
|
|
|
static const true_false_string sctp_pktdropk_t_bit_value = {
|
|
"Packet is truncated",
|
|
"Packet is not truncated"
|
|
};
|
|
|
|
static void
|
|
dissect_pktdrop_chunk(tvbuff_t *chunk_tvb, packet_info *pinfo, proto_tree *chunk_tree, proto_item *flags_item)
|
|
{
|
|
guint16 data_field_length;
|
|
tvbuff_t *data_field_tvb;
|
|
proto_tree *flags_tree;
|
|
|
|
data_field_length = tvb_get_ntohs(chunk_tvb, CHUNK_LENGTH_OFFSET) - PKTDROP_CHUNK_HEADER_LENGTH;
|
|
data_field_tvb = tvb_new_subset(chunk_tvb, PKTDROP_CHUNK_DATA_FIELD_OFFSET, data_field_length, data_field_length);
|
|
|
|
if (chunk_tree) {
|
|
flags_tree = proto_item_add_subtree(flags_item, ett_sctp_pktdrop_chunk_flags);
|
|
|
|
proto_tree_add_item(flags_tree, hf_pktdrop_chunk_m_bit, chunk_tvb, CHUNK_FLAGS_OFFSET, CHUNK_FLAGS_LENGTH, NETWORK_BYTE_ORDER);
|
|
/*
|
|
proto_tree_add_item(flags_tree, hf_pktdrop_chunk_s_bit, chunk_tvb, CHUNK_FLAGS_OFFSET, CHUNK_FLAGS_LENGTH, NETWORK_BYTE_ORDER);
|
|
*/
|
|
proto_tree_add_item(flags_tree, hf_pktdrop_chunk_b_bit, chunk_tvb, CHUNK_FLAGS_OFFSET, CHUNK_FLAGS_LENGTH, NETWORK_BYTE_ORDER);
|
|
proto_tree_add_item(flags_tree, hf_pktdrop_chunk_t_bit, chunk_tvb, CHUNK_FLAGS_OFFSET, CHUNK_FLAGS_LENGTH, NETWORK_BYTE_ORDER);
|
|
proto_tree_add_item(chunk_tree, hf_pktdrop_chunk_bandwidth, chunk_tvb, PKTDROP_CHUNK_BANDWIDTH_OFFSET, PKTDROP_CHUNK_BANDWIDTH_LENGTH, NETWORK_BYTE_ORDER);
|
|
proto_tree_add_item(chunk_tree, hf_pktdrop_chunk_queuesize, chunk_tvb, PKTDROP_CHUNK_QUEUESIZE_OFFSET, PKTDROP_CHUNK_QUEUESIZE_LENGTH, NETWORK_BYTE_ORDER);
|
|
proto_tree_add_item(chunk_tree, hf_pktdrop_chunk_truncated_length, chunk_tvb, PKTDROP_CHUNK_TRUNCATED_SIZE_OFFSET, PKTDROP_CHUNK_TRUNCATED_SIZE_LENGTH, NETWORK_BYTE_ORDER);
|
|
proto_tree_add_item(chunk_tree, hf_pktdrop_chunk_reserved, chunk_tvb, PKTDROP_CHUNK_RESERVED_SIZE_OFFSET, PKTDROP_CHUNK_RESERVED_SIZE_LENGTH, NETWORK_BYTE_ORDER);
|
|
if (tvb_get_guint8(chunk_tvb, CHUNK_FLAGS_OFFSET) & SCTP_PKTDROP_CHUNK_T_BIT)
|
|
proto_tree_add_item(chunk_tree, hf_pktdrop_chunk_data_field, chunk_tvb, PKTDROP_CHUNK_DATA_FIELD_OFFSET, data_field_length, NETWORK_BYTE_ORDER);
|
|
else
|
|
dissect_sctp_packet(data_field_tvb, pinfo, chunk_tree);
|
|
}
|
|
}
|
|
|
|
static void
|
|
dissect_unknown_chunk(tvbuff_t *chunk_tvb, proto_tree *chunk_tree, proto_item *chunk_item)
|
|
{
|
|
guint chunk_value_length;
|
|
|
|
if (chunk_tree) {
|
|
chunk_value_length = tvb_get_ntohs(chunk_tvb, CHUNK_LENGTH_OFFSET) - CHUNK_HEADER_LENGTH;
|
|
if (chunk_value_length > 0)
|
|
proto_tree_add_item(chunk_tree, hf_chunk_value, chunk_tvb, CHUNK_VALUE_OFFSET, chunk_value_length, NETWORK_BYTE_ORDER);
|
|
proto_item_append_text(chunk_item, " (Type: %u, value length: %u byte%s)", tvb_get_guint8(chunk_tvb, CHUNK_TYPE_OFFSET), chunk_value_length, plurality(chunk_value_length, "", "s"));
|
|
}
|
|
}
|
|
|
|
#define SCTP_CHUNK_BIT_1 0x80
|
|
#define SCTP_CHUNK_BIT_2 0x40
|
|
|
|
static const true_false_string sctp_chunk_bit_1_value = {
|
|
"Skip chunk and continue prosessing of the packet",
|
|
"Stop processing of the packet"
|
|
};
|
|
|
|
static const true_false_string sctp_chunk_bit_2_value = {
|
|
"Do report",
|
|
"Do not report"
|
|
};
|
|
|
|
|
|
static gboolean
|
|
dissect_sctp_chunk(tvbuff_t *chunk_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *sctp_tree, gboolean useinfo)
|
|
{
|
|
guint8 type, flags;
|
|
guint16 length, padding_length;
|
|
gboolean result;
|
|
proto_item *flags_item;
|
|
proto_item *chunk_item;
|
|
proto_tree *chunk_tree;
|
|
proto_item *type_item;
|
|
proto_tree *type_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);
|
|
padding_length = tvb_length(chunk_tvb) - length;
|
|
|
|
if (useinfo && (check_col(pinfo->cinfo, COL_INFO)))
|
|
col_add_fstr(pinfo->cinfo, COL_INFO, "%s ", val_to_str(type, chunk_type_values, "RESERVED"));
|
|
|
|
if (tree) {
|
|
/* create proto_tree stuff */
|
|
chunk_item = proto_tree_add_text(sctp_tree, chunk_tvb, CHUNK_HEADER_OFFSET, tvb_length(chunk_tvb), "%s chunk", val_to_str(type, chunk_type_values, "RESERVED"));
|
|
chunk_tree = proto_item_add_subtree(chunk_item, ett_sctp_chunk);
|
|
|
|
/* then insert the chunk header components into the protocol tree */
|
|
type_item = proto_tree_add_item(chunk_tree, hf_chunk_type, chunk_tvb, CHUNK_TYPE_OFFSET, CHUNK_TYPE_LENGTH, NETWORK_BYTE_ORDER);
|
|
type_tree = proto_item_add_subtree(type_item, ett_sctp_chunk_type);
|
|
proto_tree_add_item(type_tree, hf_chunk_bit_1, chunk_tvb, CHUNK_TYPE_OFFSET, CHUNK_TYPE_LENGTH, NETWORK_BYTE_ORDER);
|
|
proto_tree_add_item(type_tree, hf_chunk_bit_2, chunk_tvb, CHUNK_TYPE_OFFSET, CHUNK_TYPE_LENGTH, NETWORK_BYTE_ORDER);
|
|
flags_item = proto_tree_add_item(chunk_tree, hf_chunk_flags, chunk_tvb, CHUNK_FLAGS_OFFSET, CHUNK_FLAGS_LENGTH, NETWORK_BYTE_ORDER);
|
|
proto_tree_add_item(chunk_tree, hf_chunk_length, chunk_tvb, CHUNK_LENGTH_OFFSET, CHUNK_LENGTH_LENGTH, NETWORK_BYTE_ORDER);
|
|
} 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, 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, flags_item);
|
|
break;
|
|
case SCTP_SHUTDOWN_CHUNK_ID:
|
|
dissect_shutdown_chunk(chunk_tvb, chunk_tree, chunk_item);
|
|
break;
|
|
case SCTP_SHUTDOWN_ACK_CHUNK_ID:
|
|
dissect_shutdown_ack_chunk(chunk_tvb);
|
|
break;
|
|
case SCTP_ERROR_CHUNK_ID:
|
|
dissect_error_chunk(chunk_tvb, pinfo, chunk_tree);
|
|
break;
|
|
case SCTP_COOKIE_ECHO_CHUNK_ID:
|
|
dissect_cookie_echo_chunk(chunk_tvb, chunk_tree, chunk_item);
|
|
break;
|
|
case SCTP_COOKIE_ACK_CHUNK_ID:
|
|
dissect_cookie_ack_chunk(chunk_tvb);
|
|
break;
|
|
case SCTP_ECNE_CHUNK_ID:
|
|
dissect_ecne_chunk(chunk_tvb, chunk_tree, chunk_item);
|
|
break;
|
|
case SCTP_CWR_CHUNK_ID:
|
|
dissect_cwr_chunk(chunk_tvb, chunk_tree, chunk_item);
|
|
break;
|
|
case SCTP_SHUTDOWN_COMPLETE_CHUNK_ID:
|
|
dissect_shutdown_complete_chunk(chunk_tvb, chunk_tree, flags_item);
|
|
break;
|
|
case SCTP_FORWARD_TSN_CHUNK_ID:
|
|
dissect_forward_tsn_chunk(chunk_tvb, chunk_tree, chunk_item);
|
|
break;
|
|
case SCTP_ASCONF_ACK_CHUNK_ID:
|
|
dissect_asconf_ack_chunk(chunk_tvb, pinfo, chunk_tree);
|
|
break;
|
|
case SCTP_ASCONF_CHUNK_ID:
|
|
dissect_asconf_chunk(chunk_tvb, pinfo, chunk_tree);
|
|
break;
|
|
case SCTP_PKTDROP_CHUNK_ID:
|
|
dissect_pktdrop_chunk(chunk_tvb, pinfo, chunk_tree, flags_item);
|
|
break;
|
|
default:
|
|
dissect_unknown_chunk(chunk_tvb, chunk_tree, chunk_item);
|
|
break;
|
|
}
|
|
|
|
if (padding_length > 0)
|
|
proto_tree_add_item(chunk_tree, hf_chunk_padding, chunk_tvb, CHUNK_HEADER_OFFSET + length, padding_length, NETWORK_BYTE_ORDER);
|
|
|
|
if (useinfo && ((type == SCTP_DATA_CHUNK_ID) || show_always_control_chunks))
|
|
col_set_fence(pinfo->cinfo, COL_INFO);
|
|
|
|
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, total_length, remaining_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((remaining_length = tvb_length_remaining(tvb, offset))) {
|
|
/* extract the chunk length and compute number of padding bytes */
|
|
length = tvb_get_ntohs(tvb, offset + CHUNK_LENGTH_OFFSET);
|
|
total_length = ADD_PADDING(length);
|
|
if (remaining_length >= length)
|
|
total_length = MIN(total_length, remaining_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, TRUE) && (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);
|
|
}
|
|
}
|
|
|
|
static void
|
|
dissect_sctp_packet(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
|
|
{
|
|
guint32 checksum, calculated_crc32c, calculated_adler32;
|
|
guint length;
|
|
gboolean crc32c_correct, adler32_correct;
|
|
proto_item *sctp_item;
|
|
proto_tree *sctp_tree;
|
|
|
|
/* 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_item(sctp_tree, hf_source_port, tvb, SOURCE_PORT_OFFSET, SOURCE_PORT_LENGTH, NETWORK_BYTE_ORDER);
|
|
proto_tree_add_item(sctp_tree, hf_destination_port, tvb, DESTINATION_PORT_OFFSET, DESTINATION_PORT_LENGTH, NETWORK_BYTE_ORDER);
|
|
proto_tree_add_item(sctp_tree, hf_verification_tag, tvb, VERIFICATION_TAG_OFFSET, VERIFICATION_TAG_LENGTH, NETWORK_BYTE_ORDER);
|
|
proto_tree_add_item_hidden(sctp_tree, hf_port, tvb, SOURCE_PORT_OFFSET, SOURCE_PORT_LENGTH, NETWORK_BYTE_ORDER);
|
|
proto_tree_add_item_hidden(sctp_tree, hf_port, tvb, DESTINATION_PORT_OFFSET, DESTINATION_PORT_LENGTH, NETWORK_BYTE_ORDER);
|
|
|
|
length = tvb_length(tvb);
|
|
checksum = tvb_get_ntohl(tvb, CHECKSUM_OFFSET);
|
|
switch(sctp_checksum) {
|
|
case SCTP_CHECKSUM_NONE:
|
|
proto_tree_add_uint_format(sctp_tree, hf_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_checksum, tvb, CHECKSUM_OFFSET, CHECKSUM_LENGTH,
|
|
checksum, "Checksum: 0x%08x (correct Adler32)", checksum);
|
|
else
|
|
proto_tree_add_uint_format(sctp_tree, hf_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_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_checksum, tvb, CHECKSUM_OFFSET, CHECKSUM_LENGTH,
|
|
checksum, "Checksum: 0x%08x (correct CRC32C)", checksum);
|
|
else
|
|
proto_tree_add_uint_format(sctp_tree, hf_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_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_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_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_checksum, tvb, CHECKSUM_OFFSET, CHECKSUM_LENGTH,
|
|
checksum, "Checksum: 0x%08x (correct Adler32 and CRC32C)", checksum);
|
|
else
|
|
proto_tree_add_uint_format(sctp_tree, hf_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_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);
|
|
}
|
|
|
|
static void
|
|
dissect_sctp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
|
|
{
|
|
guint16 source_port, destination_port;
|
|
|
|
/* Extract the common header */
|
|
source_port = tvb_get_ntohs(tvb, SOURCE_PORT_OFFSET);
|
|
destination_port = tvb_get_ntohs(tvb, DESTINATION_PORT_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_set_str(pinfo->cinfo, COL_INFO, "");
|
|
|
|
dissect_sctp_packet(tvb, pinfo, tree);
|
|
}
|
|
|
|
/* Register the protocol with Ethereal */
|
|
void
|
|
proto_register_sctp(void)
|
|
{
|
|
|
|
/* Setup list of header fields */
|
|
static hf_register_info hf[] = {
|
|
{ &hf_source_port, { "Source port", "sctp.srcport", FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL } },
|
|
{ &hf_destination_port, { "Destination port", "sctp.dstport", FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL } },
|
|
{ &hf_port, { "Port", "sctp.port", FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL } },
|
|
{ &hf_verification_tag, { "Verification tag", "sctp.verfication_tag", FT_UINT32, BASE_HEX, NULL, 0x0, "", HFILL } },
|
|
{ &hf_checksum, { "Checksum", "sctp.checksum", FT_UINT32, BASE_HEX, NULL, 0x0, "", HFILL } },
|
|
{ &hf_checksum_bad, { "Bad checksum", "sctp.checksum_bad", FT_BOOLEAN, BASE_NONE, NULL, 0x0, "", HFILL } },
|
|
{ &hf_chunk_type, { "Chunk type", "sctp.chunk_type", FT_UINT8, BASE_DEC, VALS(chunk_type_values), 0x0, "", HFILL } },
|
|
{ &hf_chunk_flags, { "Chunk flags", "sctp.chunk_flags", FT_UINT8, BASE_HEX, NULL, 0x0, "", HFILL } },
|
|
{ &hf_chunk_bit_1, { "Bit", "sctp.chunk_bit_1", FT_BOOLEAN, 8, TFS(&sctp_chunk_bit_1_value), SCTP_CHUNK_BIT_1, "", HFILL } },
|
|
{ &hf_chunk_bit_2, { "Bit", "sctp.chunk_bit_2", FT_BOOLEAN, 8, TFS(&sctp_chunk_bit_2_value), SCTP_CHUNK_BIT_2, "", HFILL } },
|
|
{ &hf_chunk_length, { "Chunk length", "sctp.chunk_length", FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL } },
|
|
{ &hf_chunk_padding, { "Chunk padding", "sctp.chunk_padding", FT_BYTES, BASE_NONE, NULL, 0x0, "", HFILL } },
|
|
{ &hf_chunk_value, { "Chunk value", "sctp.chunk_value", FT_BYTES, BASE_NONE, NULL, 0x0, "", HFILL } },
|
|
{ &hf_cookie, { "Cookie", "sctp.cookie", FT_BYTES, BASE_NONE, NULL, 0x0, "", HFILL } },
|
|
{ &hf_init_chunk_initiate_tag, { "Initiate tag", "sctp.init_initiate_tag", FT_UINT32, BASE_HEX, NULL, 0x0, "", HFILL } },
|
|
{ &hf_init_chunk_adv_rec_window_credit, { "Advertised receiver window credit (a_rwnd)", "sctp.init_credit", FT_UINT32, BASE_DEC, NULL, 0x0, "", HFILL } },
|
|
{ &hf_init_chunk_number_of_outbound_streams, { "Number of outbound streams", "sctp.init_nr_out_streams", FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL } },
|
|
{ &hf_init_chunk_number_of_inbound_streams, { "Number of inbound streams", "sctp.init_nr.in.streams", FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL } },
|
|
{ &hf_init_chunk_initial_tsn, { "Initial TSN", "sctp.init_initial_tsn", FT_UINT32, BASE_DEC, NULL, 0x0, "", HFILL } },
|
|
{ &hf_initack_chunk_initiate_tag, { "Initiate tag", "sctp.initack_initiate_tag", FT_UINT32, BASE_HEX, NULL, 0x0, "", HFILL } },
|
|
{ &hf_initack_chunk_adv_rec_window_credit, { "Advertised receiver window credit (a_rwnd)", "sctp.initack_credit", FT_UINT32, BASE_DEC, NULL, 0x0, "", HFILL } },
|
|
{ &hf_initack_chunk_number_of_outbound_streams, { "Number of outbound streams", "sctp.initack_nr_out_streams", FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL } },
|
|
{ &hf_initack_chunk_number_of_inbound_streams, { "Number of inbound streams", "sctp.initack_nr.in.streams", FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL } },
|
|
{ &hf_initack_chunk_initial_tsn, { "Initial TSN", "sctp.initack_initial_tsn", FT_UINT32, BASE_DEC, NULL, 0x0, "", HFILL } },
|
|
{ &hf_cumulative_tsn_ack, { "Cumulative TSN Ack", "sctp.cumulative_tsn_ack", FT_UINT32, BASE_DEC, NULL, 0x0, "", HFILL } },
|
|
{ &hf_data_chunk_tsn, { "TSN", "sctp.data_tsn", FT_UINT32, BASE_DEC, NULL, 0x0, "", HFILL } },
|
|
{ &hf_data_chunk_stream_id, { "Stream Identifier", "sctp.data_sid", FT_UINT16, BASE_HEX, NULL, 0x0, "", HFILL } },
|
|
{ &hf_data_chunk_stream_seq_number, { "Stream sequence number", "sctp.data_ssn", FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL } },
|
|
{ &hf_data_chunk_payload_proto_id, { "Payload protocol identifier", "sctp.data_payload_proto_id", FT_UINT32, BASE_DEC, VALS(sctp_payload_proto_id_values), 0x0, "", HFILL } },
|
|
{ &hf_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_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_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_sack_chunk_cumulative_tsn_ack, { "Cumulative TSN ACK", "sctp.sack_cumulative_tsn_ack", FT_UINT32, BASE_DEC, NULL, 0x0, "", HFILL } },
|
|
{ &hf_sack_chunk_adv_rec_window_credit, { "Advertised receiver window credit (a_rwnd)", "sctp.sack_a_rwnd", FT_UINT32, BASE_DEC, NULL, 0x0, "", HFILL } },
|
|
{ &hf_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_sack_chunk_number_of_dup_tsns, { "Number of duplicated TSNs", "sctp.sack_number_of_duplicated_tsns", FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL } },
|
|
{ &hf_sack_chunk_gap_block_start, { "Start", "sctp.sack_gap_block_start", FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL } },
|
|
{ &hf_sack_chunk_gap_block_end, { "End", "sctp.sack_gap_block_end", FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL } },
|
|
{ &hf_sack_chunk_duplicate_tsn, { "Duplicate TSN", "sctp.sack_duplicate_tsn", FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL } },
|
|
{ &hf_shutdown_chunk_cumulative_tsn_ack, { "Cumulative TSN Ack", "sctp.shutdown_cumulative_tsn_ack", FT_UINT32, BASE_DEC, NULL, 0x0, "", HFILL } },
|
|
{ &hf_ecne_chunk_lowest_tsn, { "Lowest TSN", "sctp.ecne_lowest_tsn", FT_UINT32, BASE_DEC, NULL, 0x0, "", HFILL } },
|
|
{ &hf_cwr_chunk_lowest_tsn, { "Lowest TSN", "sctp.cwr_lowest_tsn", FT_UINT32, BASE_DEC, NULL, 0x0, "", HFILL } },
|
|
{ &hf_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_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_forward_tsn_chunk_tsn, { "New cumulative TSN", "sctp.forward_tsn.tsn", FT_UINT32, BASE_DEC, NULL, 0x0, "", HFILL } },
|
|
{ &hf_forward_tsn_chunk_sid, { "Stream identifier", "sctp.forward_tsn_sid", FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL } },
|
|
{ &hf_forward_tsn_chunk_ssn, { "Stream sequence number", "sctp.forward_tsn_ssn", FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL } },
|
|
{ &hf_parameter_type, { "Parameter type", "sctp.parameter_type", FT_UINT16, BASE_HEX, VALS(parameter_identifier_values), 0x0, "", HFILL } },
|
|
{ &hf_parameter_length, { "Parameter length", "sctp.parameter_length", FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL } },
|
|
{ &hf_parameter_value, { "Parameter value", "sctp.parameter_value", FT_BYTES, BASE_NONE, NULL, 0x0, "", HFILL } },
|
|
{ &hf_parameter_padding, { "Parameter padding", "sctp.parameter_padding", FT_BYTES, BASE_NONE, NULL, 0x0, "", HFILL } },
|
|
{ &hf_parameter_bit_1, { "Bit", "sctp.parameter_bit_1", FT_BOOLEAN, 16, TFS(&sctp_parameter_bit_1_value), SCTP_PARAMETER_BIT_1, "", HFILL } },
|
|
{ &hf_parameter_bit_2, { "Bit", "sctp.parameter_bit_2", FT_BOOLEAN, 16, TFS(&sctp_parameter_bit_2_value), SCTP_PARAMETER_BIT_2, "", HFILL } },
|
|
{ &hf_ipv4_address, { "IP Version 4 address", "sctp.parameter_ipv4_address", FT_IPv4, BASE_NONE, NULL, 0x0, "", HFILL } },
|
|
{ &hf_ipv6_address, { "IP Version 6 address", "sctp.parameter_ipv6_address", FT_IPv6, BASE_NONE, NULL, 0x0, "", HFILL } },
|
|
{ &hf_heartbeat_info, { "Heartbeat information", "sctp.parameter_heartbeat_information", FT_BYTES, BASE_NONE, NULL, 0x0, "", HFILL } },
|
|
{ &hf_state_cookie, { "State cookie", "sctp.parameter_state_cookie", FT_BYTES, BASE_NONE, NULL, 0x0, "", HFILL } },
|
|
{ &hf_cookie_preservative_increment, { "Suggested Cookie life-span increment (msec)", "sctp.parameter_cookie_preservative_incr", FT_UINT32, BASE_DEC, NULL, 0x0, "", HFILL } },
|
|
{ &hf_hostname, { "Hostname", "sctp.parameter_hostname", FT_STRING, BASE_NONE, NULL, 0x0, "", HFILL } },
|
|
{ &hf_supported_address_type, { "Supported address type", "sctp.parameter_supported_addres_type", FT_UINT16, BASE_DEC, VALS(address_types_values), 0x0, "", HFILL } },
|
|
{ &hf_asconf_serial, { "Serial Number", "sctp.asconf_serial_number", FT_UINT32, BASE_HEX, NULL, 0x0, "", HFILL } },
|
|
{ &hf_asconf_ack_serial, { "Serial Number", "sctp.asconf_ack_serial_number", FT_UINT32, BASE_HEX, NULL, 0x0, "", HFILL } },
|
|
{ &hf_correlation_id, { "Correlation_id", "sctp.correlation_id", FT_UINT32, BASE_HEX, NULL, 0x0, "", HFILL } },
|
|
{ &hf_adap_indication, { "Indication", "sctp.adapation_layer_indication", FT_UINT32, BASE_HEX, NULL, 0x0, "", HFILL } },
|
|
{ &hf_cause_code, { "Cause code", "sctp.cause_code", FT_UINT16, BASE_HEX, VALS(cause_code_values), 0x0, "", HFILL } },
|
|
{ &hf_cause_length, { "Cause length", "sctp.cause_length", FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL } },
|
|
{ &hf_cause_info, { "Cause information", "sctp.cause_information", FT_BYTES, BASE_NONE, NULL, 0x0, "", HFILL } },
|
|
{ &hf_cause_padding, { "Cause padding", "sctp.cause_padding", FT_BYTES, BASE_NONE, NULL, 0x0, "", HFILL } },
|
|
{ &hf_cause_stream_identifier, { "Stream identifier", "sctp.cause_stream_identifier", FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL } },
|
|
{ &hf_cause_reserved, { "Reserved", "sctp.cause_reserved", FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL } },
|
|
{ &hf_cause_number_of_missing_parameters, { "Number of missing parameters", "sctp.cause_nr_of_missing_parameters", FT_UINT32, BASE_DEC, NULL, 0x0, "", HFILL } },
|
|
{ &hf_cause_missing_parameter_type, { "Missing parameter type", "sctp.cause_missing_parameter_type", FT_UINT16, BASE_HEX, VALS(parameter_identifier_values), 0x0, "", HFILL } },
|
|
{ &hf_cause_measure_of_staleness, { "Measure of staleness in usec", "sctp.cause_measure_of_staleness", FT_UINT32, BASE_DEC, NULL, 0x0, "", HFILL } },
|
|
{ &hf_cause_tsn, { "TSN", "sctp.cause_tsn", FT_UINT32, BASE_DEC, NULL, 0x0, "", HFILL } },
|
|
{ &hf_pktdrop_chunk_m_bit, { "M-Bit", "sctp.pckdrop_m_bit", FT_BOOLEAN, 8, TFS(&sctp_pktdropk_m_bit_value), SCTP_PKTDROP_CHUNK_M_BIT, "", HFILL } },
|
|
/*
|
|
{ &hf_pktdrop_chunk_s_bit, { "S-Bit", "sctp.pckdrop_s_bit", FT_BOOLEAN, 8, TFS(&sctp_pktdropk_s_bit_value), SCTP_PKTDROP_CHUNK_S_BIT, "", HFILL } },
|
|
*/
|
|
{ &hf_pktdrop_chunk_b_bit, { "B-Bit", "sctp.pckdrop_b_bit", FT_BOOLEAN, 8, TFS(&sctp_pktdropk_b_bit_value), SCTP_PKTDROP_CHUNK_B_BIT, "", HFILL } },
|
|
{ &hf_pktdrop_chunk_t_bit, { "T-Bit", "sctp.pckdrop_t_bit", FT_BOOLEAN, 8, TFS(&sctp_pktdropk_t_bit_value), SCTP_PKTDROP_CHUNK_T_BIT, "", HFILL } },
|
|
{ &hf_pktdrop_chunk_bandwidth, { "Bandwidth", "sctp.pktdrop_bandwidth", FT_UINT32, BASE_DEC, NULL, 0x0, "", HFILL } },
|
|
{ &hf_pktdrop_chunk_queuesize, { "Queuesize", "sctp.pktdrop_queuesize", FT_UINT32, BASE_DEC, NULL, 0x0, "", HFILL } },
|
|
{ &hf_pktdrop_chunk_truncated_length, { "Truncated length", "sctp.pktdrop_truncated_length", FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL } },
|
|
{ &hf_pktdrop_chunk_reserved, { "Reserved", "sctp.pktdrop_reserved", FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL } },
|
|
{ &hf_pktdrop_chunk_data_field, { "Data field", "sctp.pktdrop_datafield", FT_BYTES, BASE_NONE, 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_chunk_type,
|
|
&ett_sctp_data_chunk_flags,
|
|
&ett_sctp_abort_chunk_flags,
|
|
&ett_sctp_shutdown_complete_chunk_flags,
|
|
&ett_sctp_pktdrop_chunk_flags,
|
|
&ett_sctp_parameter_type,
|
|
&ett_sctp_sack_chunk_gap_block,
|
|
&ett_sctp_unrecognized_parameter_parameter,
|
|
};
|
|
|
|
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);
|
|
prefs_register_bool_preference(sctp_module, "show_always_control_chunks",
|
|
"Show always control chunks",
|
|
"Show always SCTP control chunks in the Info column",
|
|
&show_always_control_chunks);
|
|
prefs_register_bool_preference(sctp_module, "try_heuristic_first",
|
|
"Try heuristic sub-dissectors first",
|
|
"Try to decode a packet using an heuristic sub-dissector before using a sub-dissector registered to a specific port or PPI",
|
|
&try_heuristic_first);
|
|
|
|
/* 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);
|
|
register_heur_dissector_list("sctp", &sctp_heur_subdissector_list);
|
|
}
|
|
|
|
void
|
|
proto_reg_handoff_sctp(void)
|
|
{
|
|
dissector_handle_t sctp_handle;
|
|
|
|
data_handle = find_dissector("data");
|
|
sctp_handle = create_dissector_handle(dissect_sctp, proto_sctp);
|
|
dissector_add("ip.proto", IP_PROTO_SCTP, sctp_handle);
|
|
dissector_add("udp.port", UDP_TUNNELING_PORT, sctp_handle);
|
|
}
|