forked from osmocom/wireshark
1473 lines
50 KiB
C
1473 lines
50 KiB
C
/* packet-pgm.c
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* Routines for PGM packet disassembly, RFC 3208
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*
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* Copyright (c) 2000 by Talarian Corp
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* Rewritten by Jaap Keuter
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1999 Gerald Combs
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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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#include <epan/packet.h>
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#include <epan/afn.h>
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#include <epan/ipproto.h>
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#include <epan/in_cksum.h>
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#include <epan/prefs.h>
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#include <epan/ptvcursor.h>
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#include <epan/expert.h>
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void proto_register_pgm(void);
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void proto_reg_handoff_pgm(void);
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/*
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* Flag to control whether to check the PGM checksum.
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*/
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static gboolean pgm_check_checksum = TRUE;
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/* constants for hdr types */
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#define PGM_SPM_PCKT 0x00
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#define PGM_ODATA_PCKT 0x04
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#define PGM_RDATA_PCKT 0x05
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#define PGM_NAK_PCKT 0x08
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#define PGM_NNAK_PCKT 0x09
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#define PGM_NCF_PCKT 0x0A
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#define PGM_POLL_PCKT 0x01
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#define PGM_POLR_PCKT 0x02
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#define PGM_ACK_PCKT 0x0D
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/* option flags (main PGM header) */
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#define PGM_OPT 0x01
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#define PGM_OPT_NETSIG 0x02
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#define PGM_OPT_VAR_PKTLEN 0x40
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#define PGM_OPT_PARITY 0x80
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/* option types */
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#define PGM_OPT_LENGTH 0x00
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#define PGM_OPT_END 0x80
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#define PGM_OPT_FRAGMENT 0x01
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#define PGM_OPT_NAK_LIST 0x02
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#define PGM_OPT_JOIN 0x03
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#define PGM_OPT_REDIRECT 0x07
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#define PGM_OPT_SYN 0x0D
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#define PGM_OPT_FIN 0x0E
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#define PGM_OPT_RST 0x0F
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#define PGM_OPT_PARITY_PRM 0x08
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#define PGM_OPT_PARITY_GRP 0x09
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#define PGM_OPT_CURR_TGSIZE 0x0A
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#define PGM_OPT_PGMCC_DATA 0x12
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#define PGM_OPT_PGMCC_FEEDBACK 0x13
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#define PGM_OPT_NAK_BO_IVL 0x04
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#define PGM_OPT_NAK_BO_RNG 0x05
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/* POLL subtypes */
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#define PGM_POLL_GENERAL 0x0
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#define PGM_POLL_DLR 0x1
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/* OPX bit values */
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#define PGM_OPX_IGNORE 0x00
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#define PGM_OPX_INVAL 0x01
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#define PGM_OPX_DISCARD 0x10
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#define PGM_OPT_NAK_LIST_SIZE 4
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/*
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* To squeeze the whole option into 255 bytes, we
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* can only have 62 in the list
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*/
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#define PGM_MAX_NAK_LIST_SZ (62)
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#define PGM_OPT_JOIN_SIZE 8
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#define PGM_OPT_PARITY_PRM_SIZE 8
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/* OPT_PARITY_PRM P and O bits */
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#define PGM_OPT_PARITY_PRM_PRO 0x2
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#define PGM_OPT_PARITY_PRM_OND 0x1
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#define PGM_OPT_PARITY_GRP_SIZE 8
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#define PGM_OPT_CURR_TGSIZE_SIZE 8
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#define PGM_OPT_PGMCC_DATA_SIZE 16
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#define PGM_OPT_PGMCC_FEEDBACK_SIZE 16
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#define PGM_OPT_NAK_BO_IVL_SIZE 12
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#define PGM_OPT_NAK_BO_RNG_SIZE 12
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#define PGM_OPT_REDIRECT_SIZE 12
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#define PGM_OPT_FRAGMENT_SIZE 16
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/*
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* Udp port for UDP encapsulation
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*/
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#define DEFAULT_UDP_ENCAP_UCAST_PORT 3055
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#define DEFAULT_UDP_ENCAP_MCAST_PORT 3056
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static guint udp_encap_ucast_port = 0;
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static guint udp_encap_mcast_port = 0;
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static int proto_pgm = -1;
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static int ett_pgm = -1;
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static int ett_pgm_optbits = -1;
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static int ett_pgm_opts = -1;
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static int ett_pgm_spm = -1;
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static int ett_pgm_data = -1;
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static int ett_pgm_nak = -1;
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static int ett_pgm_poll = -1;
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static int ett_pgm_polr = -1;
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static int ett_pgm_ack = -1;
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static int ett_pgm_opts_join = -1;
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static int ett_pgm_opts_parityprm = -1;
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static int ett_pgm_opts_paritygrp = -1;
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static int ett_pgm_opts_naklist = -1;
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static int ett_pgm_opts_ccdata = -1;
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static int ett_pgm_opts_nak_bo_ivl = -1;
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static int ett_pgm_opts_nak_bo_rng = -1;
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static int ett_pgm_opts_redirect = -1;
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static int ett_pgm_opts_fragment = -1;
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static int hf_pgm_main_sport = -1;
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static int hf_pgm_main_dport = -1;
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static int hf_pgm_port = -1;
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static int hf_pgm_main_type = -1;
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static int hf_pgm_main_opts = -1;
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static int hf_pgm_main_opts_opt = -1;
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static int hf_pgm_main_opts_netsig = -1;
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static int hf_pgm_main_opts_varlen = -1;
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static int hf_pgm_main_opts_parity = -1;
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static int hf_pgm_main_cksum = -1;
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static int hf_pgm_main_cksum_status = -1;
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static int hf_pgm_main_gsi = -1;
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static int hf_pgm_main_tsdulen = -1;
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static int hf_pgm_spm_sqn = -1;
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static int hf_pgm_spm_lead = -1;
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static int hf_pgm_spm_trail = -1;
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static int hf_pgm_spm_pathafi = -1;
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static int hf_pgm_spm_res = -1;
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static int hf_pgm_spm_path = -1;
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static int hf_pgm_spm_path6 = -1;
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/* static int hf_pgm_data_sqn = -1; */
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/* static int hf_pgm_data_trail = -1; */
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static int hf_pgm_nak_sqn = -1;
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static int hf_pgm_nak_srcafi = -1;
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static int hf_pgm_nak_srcres = -1;
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static int hf_pgm_nak_src = -1;
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static int hf_pgm_nak_src6 = -1;
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static int hf_pgm_nak_grpafi = -1;
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static int hf_pgm_nak_grpres = -1;
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static int hf_pgm_nak_grp = -1;
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static int hf_pgm_nak_grp6 = -1;
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static int hf_pgm_poll_sqn = -1;
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static int hf_pgm_poll_round = -1;
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static int hf_pgm_poll_subtype = -1;
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static int hf_pgm_poll_pathafi = -1;
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static int hf_pgm_poll_res = -1;
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static int hf_pgm_poll_path = -1;
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static int hf_pgm_poll_path6 = -1;
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static int hf_pgm_poll_backoff_ivl = -1;
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static int hf_pgm_poll_rand_str = -1;
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static int hf_pgm_poll_matching_bmask = -1;
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static int hf_pgm_polr_sqn = -1;
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static int hf_pgm_polr_round = -1;
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static int hf_pgm_polr_res = -1;
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static int hf_pgm_ack_sqn = -1;
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static int hf_pgm_ack_bitmap = -1;
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static int hf_pgm_opt_type = -1;
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static int hf_pgm_opt_len = -1;
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static int hf_pgm_opt_tlen = -1;
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static int hf_pgm_genopt_end = -1;
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static int hf_pgm_genopt_type = -1;
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static int hf_pgm_genopt_len = -1;
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static int hf_pgm_genopt_opx = -1;
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static int hf_pgm_opt_join_res = -1;
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static int hf_pgm_opt_join_minjoin = -1;
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static int hf_pgm_opt_parity_prm_po = -1;
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static int hf_pgm_opt_parity_prm_prmtgsz = -1;
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static int hf_pgm_opt_parity_grp_res = -1;
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static int hf_pgm_opt_parity_grp_prmgrp = -1;
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static int hf_pgm_opt_nak_res = -1;
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static int hf_pgm_opt_nak_list = -1;
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static int hf_pgm_opt_ccdata_res = -1;
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static int hf_pgm_opt_ccdata_tsp = -1;
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static int hf_pgm_opt_ccdata_afi = -1;
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static int hf_pgm_opt_ccdata_res2 = -1;
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static int hf_pgm_opt_ccdata_acker = -1;
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static int hf_pgm_opt_ccdata_acker6 = -1;
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static int hf_pgm_opt_ccfeedbk_res = -1;
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static int hf_pgm_opt_ccfeedbk_tsp = -1;
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static int hf_pgm_opt_ccfeedbk_afi = -1;
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static int hf_pgm_opt_ccfeedbk_lossrate = -1;
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static int hf_pgm_opt_ccfeedbk_acker = -1;
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static int hf_pgm_opt_ccfeedbk_acker6 = -1;
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static int hf_pgm_opt_nak_bo_ivl_res = -1;
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static int hf_pgm_opt_nak_bo_ivl_bo_ivl = -1;
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static int hf_pgm_opt_nak_bo_ivl_bo_ivl_sqn = -1;
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static int hf_pgm_opt_nak_bo_rng_res = -1;
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static int hf_pgm_opt_nak_bo_rng_min_bo_ivl = -1;
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static int hf_pgm_opt_nak_bo_rng_max_bo_ivl = -1;
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static int hf_pgm_opt_redirect_res = -1;
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static int hf_pgm_opt_redirect_afi = -1;
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static int hf_pgm_opt_redirect_res2 = -1;
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static int hf_pgm_opt_redirect_dlr = -1;
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static int hf_pgm_opt_redirect_dlr6 = -1;
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static int hf_pgm_opt_fragment_res = -1;
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static int hf_pgm_opt_fragment_first_sqn = -1;
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static int hf_pgm_opt_fragment_offset = -1;
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static int hf_pgm_opt_fragment_total_length = -1;
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static expert_field ei_pgm_genopt_len = EI_INIT;
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static expert_field ei_pgm_opt_tlen = EI_INIT;
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static expert_field ei_pgm_opt_type = EI_INIT;
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static expert_field ei_address_format_invalid = EI_INIT;
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static dissector_table_t subdissector_table;
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static heur_dissector_list_t heur_subdissector_list;
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static const char *
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optsstr(guint8 opts)
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{
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char *msg;
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gint returned_length, idx = 0;
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const int MAX_STR_LEN = 256;
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if (opts == 0)
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return("");
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msg=(char *)wmem_alloc(wmem_packet_scope(), MAX_STR_LEN);
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if (opts & PGM_OPT){
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returned_length = g_snprintf(&msg[idx], MAX_STR_LEN-idx, "Present");
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idx += MIN(returned_length, MAX_STR_LEN-idx);
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}
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if (opts & PGM_OPT_NETSIG){
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returned_length = g_snprintf(&msg[idx], MAX_STR_LEN-idx, "%sNetSig", (!idx)?"":",");
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idx += MIN(returned_length, MAX_STR_LEN-idx);
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}
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if (opts & PGM_OPT_VAR_PKTLEN){
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returned_length = g_snprintf(&msg[idx], MAX_STR_LEN-idx, "%sVarLen", (!idx)?"":",");
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idx += MIN(returned_length, MAX_STR_LEN-idx);
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}
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if (opts & PGM_OPT_PARITY){
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returned_length = g_snprintf(&msg[idx], MAX_STR_LEN-idx, "%sParity", (!idx)?"":",");
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idx += MIN(returned_length, MAX_STR_LEN-idx);
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}
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if (!idx) {
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g_snprintf(&msg[idx], MAX_STR_LEN-idx, "0x%x", opts);
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}
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return(msg);
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}
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static const char *
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paritystr(guint8 parity)
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{
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char *msg;
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gint returned_length, idx = 0;
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const int MAX_STR_LEN = 256;
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if (parity == 0)
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return("");
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msg=(char *)wmem_alloc(wmem_packet_scope(), MAX_STR_LEN);
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if (parity & PGM_OPT_PARITY_PRM_PRO){
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returned_length = g_snprintf(&msg[idx], MAX_STR_LEN-idx, "Pro-active");
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idx += MIN(returned_length, MAX_STR_LEN-idx);
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}
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if (parity & PGM_OPT_PARITY_PRM_OND){
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returned_length = g_snprintf(&msg[idx], MAX_STR_LEN-idx, "%sOn-demand", (!idx)?"":",");
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idx += MIN(returned_length, MAX_STR_LEN-idx);
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}
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if (!idx) {
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g_snprintf(&msg[idx], MAX_STR_LEN-idx, "0x%x", parity);
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}
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return(msg);
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}
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static const value_string opt_vals[] = {
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{ PGM_OPT_LENGTH, "Length" },
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{ PGM_OPT_END, "End" },
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{ PGM_OPT_FRAGMENT, "Fragment" },
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{ PGM_OPT_NAK_LIST, "NakList" },
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{ PGM_OPT_JOIN, "Join" },
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{ PGM_OPT_REDIRECT, "ReDirect" },
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{ PGM_OPT_SYN, "Syn" },
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{ PGM_OPT_FIN, "Fin" },
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{ PGM_OPT_RST, "Rst" },
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{ PGM_OPT_PARITY_PRM, "ParityPrm" },
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{ PGM_OPT_PARITY_GRP, "ParityGrp" },
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{ PGM_OPT_CURR_TGSIZE, "CurrTgsiz" },
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{ PGM_OPT_PGMCC_DATA, "CcData" },
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{ PGM_OPT_PGMCC_FEEDBACK, "CcFeedBack" },
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{ PGM_OPT_NAK_BO_IVL, "NakBackOffIvl" },
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{ PGM_OPT_NAK_BO_RNG, "NakBackOffRng" },
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{ PGM_OPT_FRAGMENT, "Fragment" },
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{ 0, NULL }
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};
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static const value_string opx_vals[] = {
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{ PGM_OPX_IGNORE, "Ignore" },
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{ PGM_OPX_INVAL, "Inval" },
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{ PGM_OPX_DISCARD, "DisCard" },
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{ 0, NULL }
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};
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static const true_false_string opts_present = {
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"Present",
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"Not Present"
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};
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#define TLV_CHECK(ett) \
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opt_tree = proto_tree_add_subtree_format(opts_tree, tvb, ptvcursor_current_offset(cursor), genopts_len, \
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ett, &tf, "Option: %s, Length: %u", \
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val_to_str(genopts_type, opt_vals, "Unknown (0x%02x)"), genopts_len); \
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if (genopts_len < 4) { \
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expert_add_info_format(pinfo, tf, &ei_pgm_genopt_len, \
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"Length %u invalid, must be >= 4", genopts_len); \
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return; \
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} \
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if (opts_total_len < genopts_len) { \
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expert_add_info_format(pinfo, tf, &ei_pgm_genopt_len, \
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"Length %u > remaining total options length", genopts_len); \
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return; \
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} \
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static void
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dissect_pgmopts(ptvcursor_t* cursor, packet_info *pinfo, const char *pktname)
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{
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proto_item *tf, *ti, *ti_len;
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proto_tree *opts_tree = NULL;
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proto_tree *opt_tree = NULL;
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tvbuff_t *tvb = ptvcursor_tvbuff(cursor);
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gboolean theend = FALSE;
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guint16 opts_total_len;
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guint8 genopts_type;
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guint8 genopts_len;
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guint8 opts_type;
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opts_tree = proto_tree_add_subtree_format(ptvcursor_tree(cursor), tvb, ptvcursor_current_offset(cursor), -1,
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ett_pgm_opts, &tf, "%s Options", pktname);
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ptvcursor_set_tree(cursor, opts_tree);
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opts_type = tvb_get_guint8(tvb, ptvcursor_current_offset(cursor));
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ti = ptvcursor_add(cursor, hf_pgm_opt_type, 1, ENC_BIG_ENDIAN);
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if (opts_type != PGM_OPT_LENGTH) {
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expert_add_info_format(pinfo, ti, &ei_pgm_opt_type,
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"%s Options - initial option is %s, should be %s",
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pktname,
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val_to_str(opts_type, opt_vals, "Unknown (0x%02x)"),
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val_to_str(PGM_OPT_LENGTH, opt_vals, "Unknown (0x%02x)"));
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return;
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}
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ptvcursor_add(cursor, hf_pgm_opt_len, 1, ENC_BIG_ENDIAN);
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opts_total_len = tvb_get_ntohs(tvb, ptvcursor_current_offset(cursor));
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proto_item_append_text(tf, " (Total Length %d)", opts_total_len);
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proto_item_set_len(tf, opts_total_len);
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ti_len = ptvcursor_add(cursor, hf_pgm_opt_tlen, 2, ENC_BIG_ENDIAN);
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if (opts_total_len < 4) {
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expert_add_info_format(pinfo, ti_len, &ei_pgm_opt_tlen,
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"%s Options (Total Length %u - invalid, must be >= 4)",
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pktname, opts_total_len);
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return;
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}
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for (opts_total_len -= 4; !theend && opts_total_len != 0;){
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if (opts_total_len < 4) {
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expert_add_info_format(pinfo, ti_len, &ei_pgm_opt_tlen,
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"Remaining total options length doesn't have enough for an options header");
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break;
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}
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genopts_type = tvb_get_guint8(tvb, ptvcursor_current_offset(cursor));
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genopts_len = tvb_get_guint8(tvb, ptvcursor_current_offset(cursor)+1);
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|
if (genopts_type & PGM_OPT_END) {
|
|
genopts_type &= ~PGM_OPT_END;
|
|
theend = TRUE;
|
|
}
|
|
|
|
switch(genopts_type) {
|
|
case PGM_OPT_JOIN:{
|
|
TLV_CHECK(ett_pgm_opts_join);
|
|
ptvcursor_set_tree(cursor, opt_tree);
|
|
|
|
ptvcursor_add_no_advance(cursor, hf_pgm_genopt_end, 1, ENC_BIG_ENDIAN);
|
|
ptvcursor_add(cursor, hf_pgm_genopt_type, 1, ENC_BIG_ENDIAN);
|
|
|
|
if (genopts_len < PGM_OPT_JOIN_SIZE) {
|
|
proto_tree_add_uint_format_value(opt_tree, hf_pgm_genopt_len, tvb,
|
|
ptvcursor_current_offset(cursor), 1, genopts_len,
|
|
"%u (bogus, must be >= %u)",
|
|
genopts_len, PGM_OPT_JOIN_SIZE);
|
|
break;
|
|
}
|
|
ptvcursor_add(cursor, hf_pgm_genopt_len, 1, ENC_BIG_ENDIAN);
|
|
ptvcursor_add(cursor, hf_pgm_genopt_opx, 1, ENC_BIG_ENDIAN);
|
|
ptvcursor_add(cursor, hf_pgm_opt_join_res, 1, ENC_BIG_ENDIAN);
|
|
ptvcursor_add(cursor, hf_pgm_opt_join_minjoin, 4, ENC_BIG_ENDIAN);
|
|
|
|
break;
|
|
}
|
|
case PGM_OPT_PARITY_PRM:{
|
|
guint8 optdata_po;
|
|
|
|
TLV_CHECK(ett_pgm_opts_parityprm);
|
|
ptvcursor_set_tree(cursor, opt_tree);
|
|
|
|
ptvcursor_add_no_advance(cursor, hf_pgm_genopt_end, 1, ENC_BIG_ENDIAN);
|
|
ptvcursor_add(cursor, hf_pgm_genopt_type, 1, ENC_BIG_ENDIAN);
|
|
|
|
|
|
if (genopts_len < PGM_OPT_PARITY_PRM_SIZE) {
|
|
proto_tree_add_uint_format_value(opt_tree, hf_pgm_genopt_len, ptvcursor_tvbuff(cursor),
|
|
ptvcursor_current_offset(cursor), 1, genopts_len,
|
|
"%u (bogus, must be >= %u)",
|
|
genopts_len, PGM_OPT_PARITY_PRM_SIZE);
|
|
break;
|
|
}
|
|
ptvcursor_add(cursor, hf_pgm_genopt_len, 1, ENC_BIG_ENDIAN);
|
|
ptvcursor_add(cursor, hf_pgm_genopt_opx, 1, ENC_BIG_ENDIAN);
|
|
optdata_po = tvb_get_guint8(tvb, ptvcursor_current_offset(cursor));
|
|
proto_tree_add_uint_format_value(opt_tree, hf_pgm_opt_parity_prm_po, tvb,
|
|
ptvcursor_current_offset(cursor), 1, optdata_po, "%s (0x%x)",
|
|
paritystr(optdata_po), optdata_po);
|
|
ptvcursor_advance(cursor, 1);
|
|
|
|
ptvcursor_add(cursor, hf_pgm_opt_parity_prm_prmtgsz, 4, ENC_BIG_ENDIAN);
|
|
|
|
break;
|
|
}
|
|
case PGM_OPT_PARITY_GRP:{
|
|
TLV_CHECK(ett_pgm_opts_paritygrp);
|
|
ptvcursor_set_tree(cursor, opt_tree);
|
|
|
|
ptvcursor_add_no_advance(cursor, hf_pgm_genopt_end, 1, ENC_BIG_ENDIAN);
|
|
ptvcursor_add(cursor, hf_pgm_genopt_type, 1, ENC_BIG_ENDIAN);
|
|
|
|
if (genopts_len < PGM_OPT_PARITY_GRP_SIZE) {
|
|
proto_tree_add_uint_format_value(opt_tree, hf_pgm_genopt_len, tvb,
|
|
ptvcursor_current_offset(cursor), 1, genopts_len,
|
|
"%u (bogus, must be >= %u)",
|
|
genopts_len, PGM_OPT_PARITY_GRP_SIZE);
|
|
break;
|
|
}
|
|
ptvcursor_add(cursor, hf_pgm_genopt_len, 1, ENC_BIG_ENDIAN);
|
|
ptvcursor_add(cursor, hf_pgm_genopt_opx, 1, ENC_BIG_ENDIAN);
|
|
ptvcursor_add(cursor, hf_pgm_opt_parity_grp_res, 1, ENC_BIG_ENDIAN);
|
|
ptvcursor_add(cursor, hf_pgm_opt_parity_grp_prmgrp, 4, ENC_BIG_ENDIAN);
|
|
|
|
break;
|
|
}
|
|
case PGM_OPT_NAK_LIST:{
|
|
guint8 optdata_len;
|
|
guint32 naklist[PGM_MAX_NAK_LIST_SZ+1];
|
|
unsigned char *nakbuf;
|
|
gboolean firsttime;
|
|
int i, j, naks, soffset;
|
|
|
|
TLV_CHECK(ett_pgm_opts_naklist);
|
|
ptvcursor_set_tree(cursor, opt_tree);
|
|
|
|
ptvcursor_add_no_advance(cursor, hf_pgm_genopt_end, 1, ENC_BIG_ENDIAN);
|
|
ptvcursor_add(cursor, hf_pgm_genopt_type, 1, ENC_BIG_ENDIAN);
|
|
|
|
optdata_len = tvb_get_guint8(tvb, ptvcursor_current_offset(cursor));
|
|
ptvcursor_add(cursor, hf_pgm_genopt_len, 1, ENC_BIG_ENDIAN);
|
|
ptvcursor_add(cursor, hf_pgm_genopt_opx, 1, ENC_BIG_ENDIAN);
|
|
ptvcursor_add(cursor, hf_pgm_opt_nak_res, 1, ENC_BIG_ENDIAN);
|
|
|
|
optdata_len -= PGM_OPT_NAK_LIST_SIZE;
|
|
tvb_memcpy(tvb, (guint8 *)naklist, ptvcursor_current_offset(cursor), optdata_len);
|
|
firsttime = TRUE;
|
|
soffset = 0;
|
|
naks = (int)(optdata_len/sizeof(guint32));
|
|
nakbuf = (unsigned char *)wmem_alloc(wmem_packet_scope(), 8192);
|
|
j = 0;
|
|
/*
|
|
* Print out 8 per line
|
|
*/
|
|
for (i=0; i < naks; i++) {
|
|
soffset += MIN(8192-soffset,
|
|
g_snprintf(nakbuf+soffset, 8192-soffset, "0x%lx ",
|
|
(unsigned long)g_ntohl(naklist[i])));
|
|
if ((++j % 8) == 0) {
|
|
if (firsttime) {
|
|
proto_tree_add_bytes_format(opt_tree,
|
|
hf_pgm_opt_nak_list, tvb, ptvcursor_current_offset(cursor), j*4,
|
|
nakbuf, "List(%d): %s", naks, nakbuf);
|
|
soffset = 0;
|
|
firsttime = FALSE;
|
|
} else {
|
|
proto_tree_add_bytes_format_value(opt_tree,
|
|
hf_pgm_opt_nak_list, tvb, ptvcursor_current_offset(cursor), j*4,
|
|
nakbuf, "%s", nakbuf);
|
|
soffset = 0;
|
|
}
|
|
ptvcursor_advance(cursor, j*4);
|
|
j = 0;
|
|
}
|
|
}
|
|
if (j) {
|
|
if (firsttime) {
|
|
proto_tree_add_bytes_format(opt_tree,
|
|
hf_pgm_opt_nak_list, tvb, ptvcursor_current_offset(cursor), j*4,
|
|
nakbuf, "List(%d): %s", naks, nakbuf);
|
|
} else {
|
|
proto_tree_add_bytes_format_value(opt_tree,
|
|
hf_pgm_opt_nak_list, tvb, ptvcursor_current_offset(cursor), j*4,
|
|
nakbuf, "%s", nakbuf);
|
|
}
|
|
ptvcursor_advance(cursor, j*4);
|
|
}
|
|
break;
|
|
}
|
|
case PGM_OPT_PGMCC_DATA:{
|
|
guint16 optdata_afi;
|
|
|
|
TLV_CHECK(ett_pgm_opts_ccdata);
|
|
ptvcursor_set_tree(cursor, opt_tree);
|
|
|
|
ptvcursor_add_no_advance(cursor, hf_pgm_genopt_end, 1, ENC_BIG_ENDIAN);
|
|
ptvcursor_add(cursor, hf_pgm_genopt_type, 1, ENC_BIG_ENDIAN);
|
|
|
|
if (genopts_len < PGM_OPT_PGMCC_DATA_SIZE) {
|
|
proto_tree_add_uint_format_value(opt_tree, hf_pgm_genopt_len, tvb,
|
|
ptvcursor_current_offset(cursor), 1, genopts_len,
|
|
"%u (bogus, must be >= %u)",
|
|
genopts_len, PGM_OPT_PGMCC_DATA_SIZE);
|
|
break;
|
|
}
|
|
ptvcursor_add(cursor, hf_pgm_genopt_len, 1, ENC_BIG_ENDIAN);
|
|
ptvcursor_add(cursor, hf_pgm_genopt_opx, 1, ENC_BIG_ENDIAN);
|
|
ptvcursor_add(cursor, hf_pgm_opt_ccdata_res, 1, ENC_BIG_ENDIAN);
|
|
ptvcursor_add(cursor, hf_pgm_opt_ccdata_tsp, 4, ENC_BIG_ENDIAN);
|
|
optdata_afi = tvb_get_ntohs(tvb, ptvcursor_current_offset(cursor));
|
|
ti = ptvcursor_add(cursor, hf_pgm_opt_ccdata_afi, 2, ENC_BIG_ENDIAN);
|
|
ptvcursor_add(cursor, hf_pgm_opt_ccdata_res2, 2, ENC_BIG_ENDIAN);
|
|
|
|
switch (optdata_afi) {
|
|
|
|
case AFNUM_INET:
|
|
ptvcursor_add(cursor, hf_pgm_opt_ccdata_acker, 4, ENC_BIG_ENDIAN);
|
|
break;
|
|
|
|
case AFNUM_INET6:
|
|
ptvcursor_add(cursor, hf_pgm_opt_ccdata_acker6, 16, ENC_NA);
|
|
break;
|
|
|
|
default:
|
|
expert_add_info(pinfo, ti, &ei_address_format_invalid);
|
|
break;
|
|
}
|
|
|
|
break;
|
|
}
|
|
case PGM_OPT_PGMCC_FEEDBACK:{
|
|
guint16 optdata_afi;
|
|
|
|
TLV_CHECK(ett_pgm_opts_ccdata);
|
|
ptvcursor_set_tree(cursor, opt_tree);
|
|
|
|
ptvcursor_add_no_advance(cursor, hf_pgm_genopt_end, 1, ENC_BIG_ENDIAN);
|
|
ptvcursor_add(cursor, hf_pgm_genopt_type, 1, ENC_BIG_ENDIAN);
|
|
|
|
if (genopts_len < PGM_OPT_PGMCC_FEEDBACK_SIZE) {
|
|
proto_tree_add_uint_format_value(opt_tree, hf_pgm_genopt_len, tvb,
|
|
ptvcursor_current_offset(cursor), 1, genopts_len,
|
|
"%u (bogus, must be >= %u)",
|
|
genopts_len, PGM_OPT_PGMCC_FEEDBACK_SIZE);
|
|
break;
|
|
}
|
|
ptvcursor_add(cursor, hf_pgm_genopt_len, 1, ENC_BIG_ENDIAN);
|
|
ptvcursor_add(cursor, hf_pgm_genopt_opx, 1, ENC_BIG_ENDIAN);
|
|
ptvcursor_add(cursor, hf_pgm_opt_ccfeedbk_res, 1, ENC_BIG_ENDIAN);
|
|
ptvcursor_add(cursor, hf_pgm_opt_ccfeedbk_tsp, 4, ENC_BIG_ENDIAN);
|
|
optdata_afi = tvb_get_ntohs(tvb, ptvcursor_current_offset(cursor));
|
|
ti = ptvcursor_add(cursor, hf_pgm_opt_ccfeedbk_afi, 2, ENC_BIG_ENDIAN);
|
|
ptvcursor_add(cursor, hf_pgm_opt_ccfeedbk_lossrate, 2, ENC_BIG_ENDIAN);
|
|
|
|
switch (optdata_afi) {
|
|
|
|
case AFNUM_INET:
|
|
ptvcursor_add(cursor, hf_pgm_opt_ccfeedbk_acker, 4, ENC_BIG_ENDIAN);
|
|
break;
|
|
|
|
case AFNUM_INET6:
|
|
ptvcursor_add(cursor, hf_pgm_opt_ccfeedbk_acker6, 16, ENC_NA);
|
|
break;
|
|
|
|
default:
|
|
expert_add_info(pinfo, ti, &ei_address_format_invalid);
|
|
break;
|
|
}
|
|
|
|
break;
|
|
}
|
|
case PGM_OPT_NAK_BO_IVL:{
|
|
TLV_CHECK(ett_pgm_opts_nak_bo_ivl);
|
|
ptvcursor_set_tree(cursor, opt_tree);
|
|
|
|
ptvcursor_add_no_advance(cursor, hf_pgm_genopt_end, 1, ENC_BIG_ENDIAN);
|
|
ptvcursor_add(cursor, hf_pgm_genopt_type, 1, ENC_BIG_ENDIAN);
|
|
|
|
if (genopts_len < PGM_OPT_NAK_BO_IVL_SIZE) {
|
|
proto_tree_add_uint_format_value(opt_tree, hf_pgm_genopt_len, tvb,
|
|
ptvcursor_current_offset(cursor), 1, genopts_len,
|
|
"%u (bogus, must be >= %u)",
|
|
genopts_len, PGM_OPT_NAK_BO_IVL_SIZE);
|
|
break;
|
|
}
|
|
ptvcursor_add(cursor, hf_pgm_genopt_len, 1, ENC_BIG_ENDIAN);
|
|
ptvcursor_add(cursor, hf_pgm_genopt_opx, 1, ENC_BIG_ENDIAN);
|
|
ptvcursor_add(cursor, hf_pgm_opt_nak_bo_ivl_res, 1, ENC_BIG_ENDIAN);
|
|
ptvcursor_add(cursor, hf_pgm_opt_nak_bo_ivl_bo_ivl, 4, ENC_BIG_ENDIAN);
|
|
ptvcursor_add(cursor, hf_pgm_opt_nak_bo_ivl_bo_ivl_sqn, 4, ENC_BIG_ENDIAN);
|
|
|
|
break;
|
|
}
|
|
case PGM_OPT_NAK_BO_RNG:{
|
|
TLV_CHECK(ett_pgm_opts_nak_bo_rng);
|
|
ptvcursor_set_tree(cursor, opt_tree);
|
|
|
|
ptvcursor_add_no_advance(cursor, hf_pgm_genopt_end, 1, ENC_BIG_ENDIAN);
|
|
ptvcursor_add(cursor, hf_pgm_genopt_type, 1, ENC_BIG_ENDIAN);
|
|
|
|
if (genopts_len < PGM_OPT_NAK_BO_RNG_SIZE) {
|
|
proto_tree_add_uint_format_value(opt_tree, hf_pgm_genopt_len, tvb,
|
|
ptvcursor_current_offset(cursor), 1, genopts_len,
|
|
"%u (bogus, must be >= %u)",
|
|
genopts_len, PGM_OPT_NAK_BO_RNG_SIZE);
|
|
break;
|
|
}
|
|
ptvcursor_add(cursor, hf_pgm_genopt_len, 1, ENC_BIG_ENDIAN);
|
|
ptvcursor_add(cursor, hf_pgm_genopt_opx, 1, ENC_BIG_ENDIAN);
|
|
ptvcursor_add(cursor, hf_pgm_opt_nak_bo_rng_res, 1, ENC_BIG_ENDIAN);
|
|
ptvcursor_add(cursor, hf_pgm_opt_nak_bo_rng_min_bo_ivl, 4, ENC_BIG_ENDIAN);
|
|
ptvcursor_add(cursor, hf_pgm_opt_nak_bo_rng_max_bo_ivl, 4, ENC_BIG_ENDIAN);
|
|
|
|
break;
|
|
}
|
|
case PGM_OPT_REDIRECT:{
|
|
guint16 optdata_afi;
|
|
|
|
TLV_CHECK(ett_pgm_opts_redirect);
|
|
ptvcursor_set_tree(cursor, opt_tree);
|
|
|
|
ptvcursor_add_no_advance(cursor, hf_pgm_genopt_end, 1, ENC_BIG_ENDIAN);
|
|
ptvcursor_add(cursor, hf_pgm_genopt_type, 1, ENC_BIG_ENDIAN);
|
|
|
|
if (genopts_len < PGM_OPT_REDIRECT_SIZE) {
|
|
proto_tree_add_uint_format_value(opt_tree, hf_pgm_genopt_len, tvb,
|
|
ptvcursor_current_offset(cursor), 1, genopts_len,
|
|
"%u (bogus, must be >= %u)",
|
|
genopts_len, PGM_OPT_REDIRECT_SIZE);
|
|
break;
|
|
}
|
|
ptvcursor_add(cursor, hf_pgm_genopt_len, 1, ENC_BIG_ENDIAN);
|
|
ptvcursor_add(cursor, hf_pgm_genopt_opx, 1, ENC_BIG_ENDIAN);
|
|
ptvcursor_add(cursor, hf_pgm_opt_redirect_res, 1, ENC_BIG_ENDIAN);
|
|
optdata_afi = tvb_get_ntohs(tvb, ptvcursor_current_offset(cursor));
|
|
ti = ptvcursor_add(cursor, hf_pgm_opt_redirect_afi, 2, ENC_BIG_ENDIAN);
|
|
ptvcursor_add(cursor, hf_pgm_opt_redirect_res2, 2, ENC_BIG_ENDIAN);
|
|
|
|
switch (optdata_afi) {
|
|
|
|
case AFNUM_INET:
|
|
ptvcursor_add(cursor, hf_pgm_opt_redirect_dlr, 4, ENC_BIG_ENDIAN);
|
|
break;
|
|
|
|
case AFNUM_INET6:
|
|
ptvcursor_add(cursor, hf_pgm_opt_redirect_dlr6, 16, ENC_NA);
|
|
break;
|
|
|
|
default:
|
|
expert_add_info(pinfo, ti, &ei_address_format_invalid);
|
|
break;
|
|
}
|
|
|
|
break;
|
|
}
|
|
case PGM_OPT_FRAGMENT:{
|
|
TLV_CHECK(ett_pgm_opts_fragment);
|
|
ptvcursor_set_tree(cursor, opt_tree);
|
|
|
|
ptvcursor_add_no_advance(cursor, hf_pgm_genopt_end, 1, ENC_BIG_ENDIAN);
|
|
ptvcursor_add(cursor, hf_pgm_genopt_type, 1, ENC_BIG_ENDIAN);
|
|
|
|
if (genopts_len < PGM_OPT_FRAGMENT_SIZE) {
|
|
proto_tree_add_uint_format_value(opt_tree, hf_pgm_genopt_len, tvb,
|
|
ptvcursor_current_offset(cursor), 1, genopts_len,
|
|
"%u (bogus, must be >= %u)",
|
|
genopts_len, PGM_OPT_FRAGMENT_SIZE);
|
|
break;
|
|
}
|
|
ptvcursor_add(cursor, hf_pgm_genopt_len, 1, ENC_BIG_ENDIAN);
|
|
ptvcursor_add(cursor, hf_pgm_genopt_opx, 1, ENC_BIG_ENDIAN);
|
|
ptvcursor_add(cursor, hf_pgm_opt_fragment_res, 1, ENC_BIG_ENDIAN);
|
|
ptvcursor_add(cursor, hf_pgm_opt_fragment_first_sqn, 4, ENC_BIG_ENDIAN);
|
|
ptvcursor_add(cursor, hf_pgm_opt_fragment_offset, 4, ENC_BIG_ENDIAN);
|
|
ptvcursor_add(cursor, hf_pgm_opt_fragment_total_length, 4, ENC_BIG_ENDIAN);
|
|
|
|
break;
|
|
}
|
|
default:{
|
|
TLV_CHECK(ett_pgm_opts);
|
|
ptvcursor_advance(cursor, genopts_len);
|
|
break;
|
|
}
|
|
}
|
|
|
|
opts_total_len -= genopts_len;
|
|
}
|
|
return;
|
|
}
|
|
|
|
static const value_string type_vals[] = {
|
|
{ PGM_SPM_PCKT, "SPM" },
|
|
{ PGM_RDATA_PCKT, "RDATA" },
|
|
{ PGM_ODATA_PCKT, "ODATA" },
|
|
{ PGM_NAK_PCKT, "NAK" },
|
|
{ PGM_NNAK_PCKT, "NNAK" },
|
|
{ PGM_NCF_PCKT, "NCF" },
|
|
{ PGM_POLL_PCKT, "POLL" },
|
|
{ PGM_POLR_PCKT, "POLR" },
|
|
{ PGM_ACK_PCKT, "ACK" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const value_string poll_subtype_vals[] = {
|
|
{ PGM_POLL_GENERAL, "General" },
|
|
{ PGM_POLL_DLR, "DLR" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
/* Determine if there is a sub-dissector and call it. This has been */
|
|
/* separated into a stand alone routine to other protocol dissectors */
|
|
/* can call to it, ie. socks */
|
|
|
|
static void
|
|
decode_pgm_ports(tvbuff_t *tvb, int offset, packet_info *pinfo,
|
|
proto_tree *tree, guint16 pgmhdr_sport, guint16 pgmhdr_dport)
|
|
{
|
|
tvbuff_t *next_tvb;
|
|
int found = 0;
|
|
heur_dtbl_entry_t *hdtbl_entry;
|
|
|
|
next_tvb = tvb_new_subset_remaining(tvb, offset);
|
|
|
|
/* do lookup with the subdissector table */
|
|
found = dissector_try_uint(subdissector_table, pgmhdr_sport,
|
|
next_tvb, pinfo, tree);
|
|
if (found)
|
|
return;
|
|
|
|
found = dissector_try_uint(subdissector_table, pgmhdr_dport,
|
|
next_tvb, pinfo, tree);
|
|
if (found)
|
|
return;
|
|
|
|
/* do lookup with the heuristic subdissector table */
|
|
if (dissector_try_heuristic(heur_subdissector_list, next_tvb, pinfo, tree, &hdtbl_entry, NULL))
|
|
return;
|
|
|
|
/* Oh, well, we don't know this; dissect it as data. */
|
|
call_data_dissector(next_tvb, pinfo, tree);
|
|
}
|
|
|
|
/*
|
|
* dissect_pgm - The dissector for Pragmatic General Multicast
|
|
*/
|
|
static int
|
|
dissect_pgm(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
|
|
{
|
|
guint16 pgmhdr_sport;
|
|
guint16 pgmhdr_dport;
|
|
guint8 pgmhdr_type;
|
|
guint8 pgmhdr_opts;
|
|
guint16 pgmhdr_cksum;
|
|
guint16 pgmhdr_tsdulen;
|
|
guint32 sqn;
|
|
guint16 afi;
|
|
|
|
guint plen = 0;
|
|
proto_item *ti;
|
|
const char *pktname;
|
|
const char *pollstname;
|
|
char *gsi;
|
|
gboolean isdata = FALSE;
|
|
guint pgmlen, reportedlen;
|
|
|
|
if (tvb_reported_length_remaining(tvb, 0) < 18)
|
|
return 0;
|
|
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "PGM");
|
|
col_clear(pinfo->cinfo, COL_INFO);
|
|
|
|
pinfo->srcport = pgmhdr_sport = tvb_get_ntohs(tvb, 0);
|
|
pinfo->destport = pgmhdr_dport = tvb_get_ntohs(tvb, 2);
|
|
|
|
pgmhdr_type = tvb_get_guint8(tvb, 4);
|
|
pktname = val_to_str(pgmhdr_type, type_vals, "Unknown (0x%02x)");
|
|
|
|
pgmhdr_opts = tvb_get_guint8(tvb, 5);
|
|
pgmhdr_cksum = tvb_get_ntohs(tvb, 6);
|
|
gsi = tvb_bytes_to_str(wmem_packet_scope(), tvb, 8, 6);
|
|
pgmhdr_tsdulen = tvb_get_ntohs(tvb, 14);
|
|
sqn = tvb_get_ntohl(tvb, 16);
|
|
|
|
switch(pgmhdr_type) {
|
|
case PGM_SPM_PCKT:
|
|
case PGM_NAK_PCKT:
|
|
case PGM_NNAK_PCKT:
|
|
case PGM_NCF_PCKT:
|
|
case PGM_POLR_PCKT:
|
|
case PGM_ACK_PCKT:
|
|
col_add_fstr(pinfo->cinfo, COL_INFO,
|
|
"%-5s sqn 0x%x gsi %s", pktname, sqn, gsi);
|
|
break;
|
|
case PGM_RDATA_PCKT:
|
|
case PGM_ODATA_PCKT:
|
|
col_add_fstr(pinfo->cinfo, COL_INFO,
|
|
"%-5s sqn 0x%x gsi %s tsdulen %d", pktname, sqn, gsi,
|
|
pgmhdr_tsdulen);
|
|
|
|
isdata = TRUE;
|
|
break;
|
|
case PGM_POLL_PCKT: {
|
|
guint16 poll_stype = tvb_get_ntohs(tvb, 22);
|
|
pollstname = val_to_str(poll_stype, poll_subtype_vals, "Unknown (0x%02x)");
|
|
|
|
col_add_fstr(pinfo->cinfo, COL_INFO,
|
|
"%-5s sqn 0x%x gsi %s subtype %s",
|
|
pktname, sqn, gsi, pollstname);
|
|
}
|
|
break;
|
|
default:
|
|
return 20;
|
|
}
|
|
|
|
{
|
|
proto_tree *pgm_tree = NULL;
|
|
proto_tree *opt_tree = NULL;
|
|
proto_tree *type_tree = NULL;
|
|
proto_item *tf, *hidden_item;
|
|
ptvcursor_t* cursor;
|
|
|
|
ti = proto_tree_add_protocol_format(tree, proto_pgm,
|
|
tvb, 0, -1,
|
|
"Pragmatic General Multicast: Type %s"
|
|
" Src Port %u, Dst Port %u, GSI %s", pktname,
|
|
pgmhdr_sport, pgmhdr_dport, gsi);
|
|
|
|
pgm_tree = proto_item_add_subtree(ti, ett_pgm);
|
|
|
|
cursor = ptvcursor_new(pgm_tree, tvb, 0);
|
|
|
|
hidden_item = proto_tree_add_item(pgm_tree, hf_pgm_port, tvb, 0, 2, ENC_BIG_ENDIAN);
|
|
PROTO_ITEM_SET_HIDDEN(hidden_item);
|
|
hidden_item = proto_tree_add_item(pgm_tree, hf_pgm_port, tvb, 2, 2, ENC_BIG_ENDIAN);
|
|
PROTO_ITEM_SET_HIDDEN(hidden_item);
|
|
ptvcursor_add(cursor, hf_pgm_main_sport, 2, ENC_BIG_ENDIAN);
|
|
ptvcursor_add(cursor, hf_pgm_main_dport, 2, ENC_BIG_ENDIAN);
|
|
ptvcursor_add(cursor, hf_pgm_main_type, 1, ENC_BIG_ENDIAN);
|
|
|
|
tf = proto_tree_add_uint_format_value(pgm_tree, hf_pgm_main_opts, tvb,
|
|
ptvcursor_current_offset(cursor), 1, pgmhdr_opts, "%s (0x%x)",
|
|
optsstr(pgmhdr_opts), pgmhdr_opts);
|
|
opt_tree = proto_item_add_subtree(tf, ett_pgm_optbits);
|
|
ptvcursor_set_tree(cursor, opt_tree);
|
|
|
|
ptvcursor_add_no_advance(cursor, hf_pgm_main_opts_opt, 1, ENC_BIG_ENDIAN);
|
|
ptvcursor_add_no_advance(cursor, hf_pgm_main_opts_netsig, 1, ENC_BIG_ENDIAN);
|
|
ptvcursor_add_no_advance(cursor, hf_pgm_main_opts_varlen, 1, ENC_BIG_ENDIAN);
|
|
ptvcursor_add(cursor, hf_pgm_main_opts_parity, 1, ENC_BIG_ENDIAN);
|
|
ptvcursor_set_tree(cursor, pgm_tree);
|
|
|
|
/* Checksum may be 0 (not available), but not for DATA packets */
|
|
if ((pgmhdr_type != PGM_RDATA_PCKT) && (pgmhdr_type != PGM_ODATA_PCKT) &&
|
|
(pgmhdr_cksum == 0))
|
|
{
|
|
proto_tree_add_checksum(pgm_tree, tvb, ptvcursor_current_offset(cursor), hf_pgm_main_cksum, hf_pgm_main_cksum_status, NULL, pinfo, 0, ENC_BIG_ENDIAN, PROTO_CHECKSUM_NOT_PRESENT);
|
|
} else {
|
|
reportedlen = tvb_reported_length(tvb);
|
|
pgmlen = tvb_captured_length(tvb);
|
|
if (pgm_check_checksum && pgmlen >= reportedlen) {
|
|
vec_t cksum_vec[1];
|
|
|
|
SET_CKSUM_VEC_TVB(cksum_vec[0], tvb, 0, pgmlen);
|
|
proto_tree_add_checksum(pgm_tree, tvb, ptvcursor_current_offset(cursor), hf_pgm_main_cksum_status, -1, NULL, pinfo,
|
|
in_cksum(&cksum_vec[0], 1), ENC_BIG_ENDIAN, PROTO_CHECKSUM_VERIFY|PROTO_CHECKSUM_IN_CKSUM);
|
|
} else {
|
|
proto_tree_add_checksum(pgm_tree, tvb, ptvcursor_current_offset(cursor), hf_pgm_main_cksum, hf_pgm_main_cksum_status, NULL, pinfo, 0, ENC_BIG_ENDIAN, PROTO_CHECKSUM_NO_FLAGS);
|
|
}
|
|
}
|
|
ptvcursor_advance(cursor, 2);
|
|
|
|
ptvcursor_add(cursor, hf_pgm_main_gsi, 6, ENC_NA);
|
|
ptvcursor_add(cursor, hf_pgm_main_tsdulen, 2, ENC_BIG_ENDIAN);
|
|
|
|
switch(pgmhdr_type) {
|
|
case PGM_SPM_PCKT:
|
|
type_tree = proto_tree_add_subtree_format(pgm_tree, tvb, ptvcursor_current_offset(cursor), plen,
|
|
ett_pgm_spm, NULL, "%s Packet", pktname);
|
|
ptvcursor_set_tree(cursor, type_tree);
|
|
|
|
ptvcursor_add(cursor, hf_pgm_spm_sqn, 4, ENC_BIG_ENDIAN);
|
|
ptvcursor_add(cursor, hf_pgm_spm_trail, 4, ENC_BIG_ENDIAN);
|
|
ptvcursor_add(cursor, hf_pgm_spm_lead, 4, ENC_BIG_ENDIAN);
|
|
afi = tvb_get_ntohs(tvb, ptvcursor_current_offset(cursor));
|
|
ti = ptvcursor_add(cursor, hf_pgm_spm_pathafi, 2, ENC_BIG_ENDIAN);
|
|
ptvcursor_add(cursor, hf_pgm_spm_res, 2, ENC_BIG_ENDIAN);
|
|
|
|
switch (afi) {
|
|
case AFNUM_INET:
|
|
ptvcursor_add(cursor, hf_pgm_spm_path, 4, ENC_BIG_ENDIAN);
|
|
break;
|
|
|
|
case AFNUM_INET6:
|
|
ptvcursor_add(cursor, hf_pgm_spm_path6, 16, ENC_NA);
|
|
break;
|
|
|
|
default:
|
|
expert_add_info(pinfo, ti, &ei_address_format_invalid);
|
|
ptvcursor_free(cursor);
|
|
return tvb_captured_length(tvb);
|
|
}
|
|
break;
|
|
case PGM_RDATA_PCKT:
|
|
case PGM_ODATA_PCKT:
|
|
type_tree = proto_tree_add_subtree_format(pgm_tree, tvb, ptvcursor_current_offset(cursor), plen,
|
|
ett_pgm_data, NULL, "%s Packet", pktname);
|
|
ptvcursor_set_tree(cursor, type_tree);
|
|
|
|
ptvcursor_add(cursor, hf_pgm_spm_sqn, 4, ENC_BIG_ENDIAN);
|
|
ptvcursor_add(cursor, hf_pgm_spm_trail, 4, ENC_BIG_ENDIAN);
|
|
break;
|
|
case PGM_NAK_PCKT:
|
|
case PGM_NNAK_PCKT:
|
|
case PGM_NCF_PCKT:
|
|
type_tree = proto_tree_add_subtree_format(pgm_tree, tvb, ptvcursor_current_offset(cursor), plen,
|
|
ett_pgm_nak, NULL, "%s Packet", pktname);
|
|
ptvcursor_set_tree(cursor, type_tree);
|
|
|
|
ptvcursor_add(cursor, hf_pgm_nak_sqn, 4, ENC_BIG_ENDIAN);
|
|
afi = tvb_get_ntohs(tvb, ptvcursor_current_offset(cursor));
|
|
ti = ptvcursor_add(cursor, hf_pgm_nak_srcafi, 2, ENC_BIG_ENDIAN);
|
|
ptvcursor_add(cursor, hf_pgm_nak_srcres, 2, ENC_BIG_ENDIAN);
|
|
|
|
switch (afi) {
|
|
case AFNUM_INET:
|
|
ptvcursor_add(cursor, hf_pgm_nak_src, 4, ENC_BIG_ENDIAN);
|
|
break;
|
|
|
|
case AFNUM_INET6:
|
|
ptvcursor_add(cursor, hf_pgm_nak_src6, 16, ENC_NA);
|
|
break;
|
|
|
|
default:
|
|
expert_add_info(pinfo, ti, &ei_address_format_invalid);
|
|
break;
|
|
}
|
|
|
|
afi = tvb_get_ntohs(tvb, ptvcursor_current_offset(cursor));
|
|
ti = ptvcursor_add(cursor, hf_pgm_nak_grpafi, 2, ENC_BIG_ENDIAN);
|
|
ptvcursor_add(cursor, hf_pgm_nak_grpres, 2, ENC_BIG_ENDIAN);
|
|
|
|
switch (afi) {
|
|
case AFNUM_INET:
|
|
ptvcursor_add(cursor, hf_pgm_nak_grp, 4, ENC_BIG_ENDIAN);
|
|
break;
|
|
|
|
case AFNUM_INET6:
|
|
ptvcursor_add(cursor, hf_pgm_nak_grp6, 16, ENC_NA);
|
|
break;
|
|
|
|
default:
|
|
expert_add_info(pinfo, ti, &ei_address_format_invalid);
|
|
ptvcursor_free(cursor);
|
|
return tvb_captured_length(tvb);
|
|
}
|
|
break;
|
|
case PGM_POLL_PCKT:
|
|
type_tree = proto_tree_add_subtree_format(pgm_tree, tvb, ptvcursor_current_offset(cursor), plen,
|
|
ett_pgm_poll, NULL, "%s Packet", pktname);
|
|
ptvcursor_set_tree(cursor, type_tree);
|
|
|
|
ptvcursor_add(cursor, hf_pgm_poll_sqn, 4, ENC_BIG_ENDIAN);
|
|
ptvcursor_add(cursor, hf_pgm_poll_round, 2, ENC_BIG_ENDIAN);
|
|
ptvcursor_add(cursor, hf_pgm_poll_subtype, 2, ENC_BIG_ENDIAN);
|
|
afi = tvb_get_ntohs(tvb, ptvcursor_current_offset(cursor));
|
|
ti = ptvcursor_add(cursor, hf_pgm_poll_pathafi, 2, ENC_BIG_ENDIAN);
|
|
ptvcursor_add(cursor, hf_pgm_poll_res, 2, ENC_BIG_ENDIAN);
|
|
|
|
switch (afi) {
|
|
case AFNUM_INET:
|
|
ptvcursor_add(cursor, hf_pgm_poll_path, 4, ENC_BIG_ENDIAN);
|
|
break;
|
|
|
|
case AFNUM_INET6:
|
|
ptvcursor_add(cursor, hf_pgm_poll_path6, 16, ENC_NA);
|
|
break;
|
|
|
|
default:
|
|
expert_add_info(pinfo, ti, &ei_address_format_invalid);
|
|
break;
|
|
}
|
|
|
|
ptvcursor_add(cursor, hf_pgm_poll_backoff_ivl, 4, ENC_BIG_ENDIAN);
|
|
ptvcursor_add(cursor, hf_pgm_poll_rand_str, 4, ENC_BIG_ENDIAN);
|
|
ptvcursor_add(cursor, hf_pgm_poll_matching_bmask, 4, ENC_BIG_ENDIAN);
|
|
break;
|
|
case PGM_POLR_PCKT:
|
|
type_tree = proto_tree_add_subtree_format(pgm_tree, tvb, ptvcursor_current_offset(cursor), plen,
|
|
ett_pgm_polr, NULL, "%s Packet", pktname);
|
|
ptvcursor_set_tree(cursor, type_tree);
|
|
|
|
ptvcursor_add(cursor, hf_pgm_polr_sqn, 4, ENC_BIG_ENDIAN);
|
|
ptvcursor_add(cursor, hf_pgm_polr_round, 2, ENC_BIG_ENDIAN);
|
|
ptvcursor_add(cursor, hf_pgm_polr_res, 2, ENC_BIG_ENDIAN);
|
|
break;
|
|
case PGM_ACK_PCKT:
|
|
type_tree = proto_tree_add_subtree_format(pgm_tree, tvb, ptvcursor_current_offset(cursor), plen,
|
|
ett_pgm_ack, NULL, "%s Packet", pktname);
|
|
ptvcursor_set_tree(cursor, type_tree);
|
|
|
|
ptvcursor_add(cursor, hf_pgm_ack_sqn, 4, ENC_BIG_ENDIAN);
|
|
ptvcursor_add(cursor, hf_pgm_ack_bitmap, 4, ENC_BIG_ENDIAN);
|
|
break;
|
|
}
|
|
|
|
if (pgmhdr_opts & PGM_OPT)
|
|
dissect_pgmopts(cursor, pinfo, pktname);
|
|
|
|
if (isdata)
|
|
decode_pgm_ports(tvb, ptvcursor_current_offset(cursor), pinfo, tree, pgmhdr_sport, pgmhdr_dport);
|
|
|
|
ptvcursor_free(cursor);
|
|
}
|
|
return tvb_captured_length(tvb);
|
|
}
|
|
|
|
/* Register all the bits needed with the filtering engine */
|
|
void
|
|
proto_register_pgm(void)
|
|
{
|
|
static hf_register_info hf[] = {
|
|
{ &hf_pgm_main_sport,
|
|
{ "Source Port", "pgm.hdr.sport", FT_UINT16, BASE_DEC,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_main_dport,
|
|
{ "Destination Port", "pgm.hdr.dport", FT_UINT16, BASE_DEC,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_port,
|
|
{ "Port", "pgm.port", FT_UINT16, BASE_DEC,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_main_type,
|
|
{ "Type", "pgm.hdr.type", FT_UINT8, BASE_HEX,
|
|
VALS(type_vals), 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_main_opts,
|
|
{ "Options", "pgm.hdr.opts", FT_UINT8, BASE_HEX,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_main_opts_opt,
|
|
{ "Options", "pgm.hdr.opts.opt", FT_BOOLEAN, 8,
|
|
TFS(&opts_present), PGM_OPT, NULL, HFILL }},
|
|
{ &hf_pgm_main_opts_netsig,
|
|
{ "Network Significant Options", "pgm.hdr.opts.netsig",
|
|
FT_BOOLEAN, 8,
|
|
TFS(&opts_present), PGM_OPT_NETSIG, NULL, HFILL }},
|
|
{ &hf_pgm_main_opts_varlen,
|
|
{ "Variable length Parity Packet Option", "pgm.hdr.opts.varlen",
|
|
FT_BOOLEAN, 8,
|
|
TFS(&opts_present), PGM_OPT_VAR_PKTLEN, NULL, HFILL }},
|
|
{ &hf_pgm_main_opts_parity,
|
|
{ "Parity", "pgm.hdr.opts.parity", FT_BOOLEAN, 8,
|
|
TFS(&opts_present), PGM_OPT_PARITY, NULL, HFILL }},
|
|
{ &hf_pgm_main_cksum,
|
|
{ "Checksum", "pgm.hdr.cksum", FT_UINT16, BASE_HEX,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_main_cksum_status,
|
|
{ "Checksum Status", "pgm.hdr.cksum.status", FT_UINT8, BASE_NONE,
|
|
VALS(proto_checksum_vals), 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_main_gsi,
|
|
{ "Global Source Identifier", "pgm.hdr.gsi", FT_BYTES, BASE_NONE,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_main_tsdulen,
|
|
{ "Transport Service Data Unit Length", "pgm.hdr.tsdulen", FT_UINT16,
|
|
BASE_DEC, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_spm_sqn,
|
|
{ "Sequence number", "pgm.spm.sqn", FT_UINT32, BASE_HEX,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_spm_trail,
|
|
{ "Trailing Edge Sequence Number", "pgm.spm.trail", FT_UINT32, BASE_HEX,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_spm_lead,
|
|
{ "Leading Edge Sequence Number", "pgm.spm.lead", FT_UINT32, BASE_HEX,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_spm_pathafi,
|
|
{ "Path NLA AFI", "pgm.spm.pathafi", FT_UINT16, BASE_DEC,
|
|
VALS(afn_vals), 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_spm_res,
|
|
{ "Reserved", "pgm.spm.res", FT_UINT16, BASE_HEX,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_spm_path,
|
|
{ "Path NLA", "pgm.spm.path.ipv4", FT_IPv4, BASE_NONE,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_spm_path6,
|
|
{ "Path NLA", "pgm.spm.path.ipv6", FT_IPv6, BASE_NONE,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
#if 0
|
|
{ &hf_pgm_data_sqn,
|
|
{ "Data Packet Sequence Number", "pgm.data.sqn", FT_UINT32, BASE_HEX,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
#endif
|
|
#if 0
|
|
{ &hf_pgm_data_trail,
|
|
{ "Trailing Edge Sequence Number", "pgm.data.trail", FT_UINT32, BASE_HEX,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
#endif
|
|
{ &hf_pgm_nak_sqn,
|
|
{ "Requested Sequence Number", "pgm.nak.sqn", FT_UINT32, BASE_HEX,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_nak_srcafi,
|
|
{ "Source NLA AFI", "pgm.nak.srcafi", FT_UINT16, BASE_DEC,
|
|
VALS(afn_vals), 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_nak_srcres,
|
|
{ "Reserved", "pgm.nak.srcres", FT_UINT16, BASE_HEX,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_nak_src,
|
|
{ "Source NLA", "pgm.nak.src.ipv4", FT_IPv4, BASE_NONE,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_nak_src6,
|
|
{ "Source NLA", "pgm.nak.src.ipv6", FT_IPv6, BASE_NONE,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_nak_grpafi,
|
|
{ "Multicast Group AFI", "pgm.nak.grpafi", FT_UINT16, BASE_DEC,
|
|
VALS(afn_vals), 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_nak_grpres,
|
|
{ "Reserved", "pgm.nak.grpres", FT_UINT16, BASE_HEX,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_nak_grp,
|
|
{ "Multicast Group NLA", "pgm.nak.grp.ipv4", FT_IPv4, BASE_NONE,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_nak_grp6,
|
|
{ "Multicast Group NLA", "pgm.nak.grp.ipv6", FT_IPv6, BASE_NONE,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_poll_sqn,
|
|
{ "Sequence Number", "pgm.poll.sqn", FT_UINT32, BASE_HEX,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_poll_round,
|
|
{ "Round", "pgm.poll.round", FT_UINT16, BASE_DEC,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_poll_subtype,
|
|
{ "Subtype", "pgm.poll.subtype", FT_UINT16, BASE_HEX,
|
|
VALS(poll_subtype_vals), 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_poll_pathafi,
|
|
{ "Path NLA AFI", "pgm.poll.pathafi", FT_UINT16, BASE_DEC,
|
|
VALS(afn_vals), 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_poll_res,
|
|
{ "Reserved", "pgm.poll.res", FT_UINT16, BASE_HEX,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_poll_path,
|
|
{ "Path NLA", "pgm.poll.path.ipv4", FT_IPv4, BASE_NONE,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_poll_path6,
|
|
{ "Path NLA", "pgm.poll.path.ipv6", FT_IPv6, BASE_NONE,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_poll_backoff_ivl,
|
|
{ "Back-off Interval", "pgm.poll.backoff_ivl", FT_UINT32, BASE_DEC,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_poll_rand_str,
|
|
{ "Random String", "pgm.poll.rand_str", FT_UINT32, BASE_HEX,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_poll_matching_bmask,
|
|
{ "Matching Bitmask", "pgm.poll.matching_bmask", FT_UINT32, BASE_HEX,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_polr_sqn,
|
|
{ "Sequence Number", "pgm.polr.sqn", FT_UINT32, BASE_HEX,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_polr_round,
|
|
{ "Round", "pgm.polr.round", FT_UINT16, BASE_DEC,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_polr_res,
|
|
{ "Reserved", "pgm.polr.res", FT_UINT16, BASE_HEX,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_ack_sqn,
|
|
{ "Maximum Received Sequence Number", "pgm.ack.maxsqn", FT_UINT32,
|
|
BASE_HEX, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_ack_bitmap,
|
|
{ "Packet Bitmap", "pgm.ack.bitmap", FT_UINT32, BASE_HEX,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_opt_type,
|
|
{ "Type", "pgm.opts.type", FT_UINT8, BASE_HEX,
|
|
VALS(opt_vals), 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_opt_len,
|
|
{ "Length", "pgm.opts.len", FT_UINT8, BASE_DEC,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_opt_tlen,
|
|
{ "Total Length", "pgm.opts.tlen", FT_UINT16, BASE_DEC,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_genopt_end,
|
|
{ "Option end", "pgm.genopts.end", FT_BOOLEAN, 8,
|
|
TFS(&tfs_yes_no), 0x80, NULL, HFILL }},
|
|
{ &hf_pgm_genopt_type,
|
|
{ "Type", "pgm.genopts.type", FT_UINT8, BASE_HEX,
|
|
VALS(opt_vals), 0x7f, NULL, HFILL }},
|
|
{ &hf_pgm_genopt_len,
|
|
{ "Length", "pgm.genopts.len", FT_UINT8, BASE_DEC,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_genopt_opx,
|
|
{ "Option Extensibility Bits", "pgm.genopts.opx", FT_UINT8, BASE_HEX,
|
|
VALS(opx_vals), 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_opt_parity_prm_po,
|
|
{ "Parity Parameters", "pgm.opts.parity_prm.op", FT_UINT8, BASE_HEX,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_opt_parity_prm_prmtgsz,
|
|
{ "Transmission Group Size", "pgm.opts.parity_prm.prm_grp",
|
|
FT_UINT32, BASE_HEX,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_opt_join_res,
|
|
{ "Reserved", "pgm.opts.join.res", FT_UINT8, BASE_HEX,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_opt_join_minjoin,
|
|
{ "Minimum Sequence Number", "pgm.opts.join.min_join",
|
|
FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_opt_parity_grp_res,
|
|
{ "Reserved", "pgm.opts.parity_prm.op", FT_UINT8, BASE_HEX,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_opt_parity_grp_prmgrp,
|
|
{ "Transmission Group Size", "pgm.opts.parity_prm.prm_grp",
|
|
FT_UINT32, BASE_HEX,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_opt_nak_res,
|
|
{ "Reserved", "pgm.opts.nak.op", FT_UINT8, BASE_HEX,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_opt_nak_list,
|
|
{ "List", "pgm.opts.nak.list", FT_BYTES, BASE_NONE,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_opt_ccdata_res,
|
|
{ "Reserved", "pgm.opts.ccdata.res", FT_UINT8, BASE_DEC,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_opt_ccdata_tsp,
|
|
{ "Time Stamp", "pgm.opts.ccdata.tstamp", FT_UINT16, BASE_HEX,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_opt_ccdata_afi,
|
|
{ "Acker AFI", "pgm.opts.ccdata.afi", FT_UINT16, BASE_DEC,
|
|
VALS(afn_vals), 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_opt_ccdata_res2,
|
|
{ "Reserved", "pgm.opts.ccdata.res2", FT_UINT16, BASE_DEC,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_opt_ccdata_acker,
|
|
{ "Acker", "pgm.opts.ccdata.acker.ipv4", FT_IPv4, BASE_NONE,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_opt_ccdata_acker6,
|
|
{ "Acker", "pgm.opts.ccdata.acker.ipv6", FT_IPv6, BASE_NONE,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_opt_ccfeedbk_res,
|
|
{ "Reserved", "pgm.opts.ccdata.res", FT_UINT8, BASE_DEC,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_opt_ccfeedbk_tsp,
|
|
{ "Time Stamp", "pgm.opts.ccdata.tstamp", FT_UINT16, BASE_HEX,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_opt_ccfeedbk_afi,
|
|
{ "Acker AFI", "pgm.opts.ccdata.afi", FT_UINT16, BASE_DEC,
|
|
VALS(afn_vals), 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_opt_ccfeedbk_lossrate,
|
|
{ "Loss Rate", "pgm.opts.ccdata.lossrate", FT_UINT16, BASE_HEX,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_opt_ccfeedbk_acker,
|
|
{ "Acker", "pgm.opts.ccdata.acker.ipv4", FT_IPv4, BASE_NONE,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_opt_ccfeedbk_acker6,
|
|
{ "Acker", "pgm.opts.ccdata.acker.ipv6", FT_IPv6, BASE_NONE,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_opt_nak_bo_ivl_res,
|
|
{ "Reserved", "pgm.opts.nak_bo_ivl.res", FT_UINT8, BASE_HEX,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_opt_nak_bo_ivl_bo_ivl,
|
|
{ "Back-off Interval", "pgm.opts.nak_bo_ivl.bo_ivl", FT_UINT32, BASE_DEC,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_opt_nak_bo_ivl_bo_ivl_sqn,
|
|
{ "Back-off Interval Sequence Number", "pgm.opts.nak_bo_ivl.bo_ivl_sqn", FT_UINT32, BASE_HEX,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_opt_nak_bo_rng_res,
|
|
{ "Reserved", "pgm.opts.nak_bo_rng.res", FT_UINT8, BASE_HEX,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_opt_nak_bo_rng_min_bo_ivl,
|
|
{ "Min Back-off Interval", "pgm.opts.nak_bo_rng.min_bo_ivl", FT_UINT32, BASE_DEC,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_opt_nak_bo_rng_max_bo_ivl,
|
|
{ "Max Back-off Interval", "pgm.opts.nak_bo_rng.max_bo_ivl", FT_UINT32, BASE_DEC,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_opt_redirect_res,
|
|
{ "Reserved", "pgm.opts.redirect.res", FT_UINT8, BASE_DEC,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_opt_redirect_afi,
|
|
{ "DLR AFI", "pgm.opts.redirect.afi", FT_UINT16, BASE_DEC,
|
|
VALS(afn_vals), 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_opt_redirect_res2,
|
|
{ "Reserved", "pgm.opts.redirect.res2", FT_UINT16, BASE_HEX,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_opt_redirect_dlr,
|
|
{ "DLR", "pgm.opts.redirect.dlr.ipv4", FT_IPv4, BASE_NONE,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_opt_redirect_dlr6,
|
|
{ "DLR", "pgm.opts.redirect.dlr.ipv6", FT_IPv6, BASE_NONE,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_opt_fragment_res,
|
|
{ "Reserved", "pgm.opts.fragment.res", FT_UINT8, BASE_HEX,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_opt_fragment_first_sqn,
|
|
{ "First Sequence Number", "pgm.opts.fragment.first_sqn", FT_UINT32, BASE_HEX,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_opt_fragment_offset,
|
|
{ "Fragment Offset", "pgm.opts.fragment.fragment_offset", FT_UINT32, BASE_DEC,
|
|
NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_pgm_opt_fragment_total_length,
|
|
{ "Total Length", "pgm.opts.fragment.total_length", FT_UINT32, BASE_DEC,
|
|
NULL, 0x0, NULL, HFILL }}
|
|
};
|
|
static gint *ett[] = {
|
|
&ett_pgm,
|
|
&ett_pgm_optbits,
|
|
&ett_pgm_spm,
|
|
&ett_pgm_data,
|
|
&ett_pgm_nak,
|
|
&ett_pgm_poll,
|
|
&ett_pgm_polr,
|
|
&ett_pgm_ack,
|
|
&ett_pgm_opts,
|
|
&ett_pgm_opts_join,
|
|
&ett_pgm_opts_parityprm,
|
|
&ett_pgm_opts_paritygrp,
|
|
&ett_pgm_opts_naklist,
|
|
&ett_pgm_opts_ccdata,
|
|
&ett_pgm_opts_nak_bo_ivl,
|
|
&ett_pgm_opts_nak_bo_rng,
|
|
&ett_pgm_opts_redirect,
|
|
&ett_pgm_opts_fragment
|
|
};
|
|
static ei_register_info ei[] = {
|
|
{ &ei_pgm_opt_type, { "pgm.opts.type.invalid", PI_PROTOCOL, PI_WARN, "Invalid option", EXPFILL }},
|
|
{ &ei_pgm_opt_tlen, { "pgm.opts.tlen.invalid", PI_PROTOCOL, PI_WARN, "Total Length invalid", EXPFILL }},
|
|
{ &ei_pgm_genopt_len, { "pgm.genopts.len.invalid", PI_PROTOCOL, PI_WARN, "Option length invalid", EXPFILL }},
|
|
{ &ei_address_format_invalid, { "pgm.address_format_invalid", PI_PROTOCOL, PI_WARN, "Can't handle this address format", EXPFILL }},
|
|
};
|
|
|
|
module_t *pgm_module;
|
|
expert_module_t* expert_pgm;
|
|
|
|
proto_pgm = proto_register_protocol("Pragmatic General Multicast",
|
|
"PGM", "pgm");
|
|
|
|
proto_register_field_array(proto_pgm, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
expert_pgm = expert_register_protocol(proto_pgm);
|
|
expert_register_field_array(expert_pgm, ei, array_length(ei));
|
|
|
|
/* subdissector code */
|
|
subdissector_table = register_dissector_table("pgm.port",
|
|
"PGM port", proto_pgm, FT_UINT16, BASE_DEC, DISSECTOR_TABLE_NOT_ALLOW_DUPLICATE);
|
|
heur_subdissector_list = register_heur_dissector_list("pgm", proto_pgm);
|
|
|
|
/*
|
|
* Register configuration preferences for UDP encapsulation
|
|
* (Note: Initially the ports are set to zero and the ports
|
|
* are not registered so the dissecting of PGM
|
|
* encapsulated in UDP packets is off by default;
|
|
* dissector_add_for_decode_as is called so that pgm
|
|
* is available for 'decode-as'
|
|
*/
|
|
pgm_module = prefs_register_protocol(proto_pgm, proto_reg_handoff_pgm);
|
|
|
|
prefs_register_bool_preference(pgm_module, "check_checksum",
|
|
"Check the validity of the PGM checksum when possible",
|
|
"Whether to check the validity of the PGM checksum",
|
|
&pgm_check_checksum);
|
|
|
|
prefs_register_uint_preference(pgm_module, "udp.encap_ucast_port",
|
|
"PGM Encap Unicast Port (standard is 3055)",
|
|
"PGM Encap is PGM packets encapsulated in UDP packets"
|
|
" (Note: This option is off, i.e. port is 0, by default)",
|
|
10, &udp_encap_ucast_port);
|
|
|
|
prefs_register_uint_preference(pgm_module, "udp.encap_mcast_port",
|
|
"PGM Encap Multicast Port (standard is 3056)",
|
|
"PGM Encap is PGM packets encapsulated in UDP packets"
|
|
" (Note: This option is off, i.e. port is 0, by default)",
|
|
10, &udp_encap_mcast_port);
|
|
|
|
}
|
|
|
|
/* The registration hand-off routine */
|
|
/*
|
|
* Set up PGM Encap dissecting, which is off by default for UDP
|
|
*/
|
|
|
|
void
|
|
proto_reg_handoff_pgm(void)
|
|
{
|
|
static gboolean initialized = FALSE;
|
|
static dissector_handle_t pgm_handle;
|
|
static guint old_udp_encap_ucast_port;
|
|
static guint old_udp_encap_mcast_port;
|
|
|
|
if (! initialized) {
|
|
pgm_handle = create_dissector_handle(dissect_pgm, proto_pgm);
|
|
dissector_add_for_decode_as("udp.port", pgm_handle);
|
|
dissector_add_uint("ip.proto", IP_PROTO_PGM, pgm_handle);
|
|
initialized = TRUE;
|
|
} else {
|
|
if (old_udp_encap_ucast_port != 0) {
|
|
dissector_delete_uint("udp.port", old_udp_encap_ucast_port, pgm_handle);
|
|
}
|
|
if (old_udp_encap_mcast_port != 0) {
|
|
dissector_delete_uint("udp.port", old_udp_encap_mcast_port, pgm_handle);
|
|
}
|
|
}
|
|
|
|
if (udp_encap_ucast_port != 0) {
|
|
dissector_add_uint("udp.port", udp_encap_ucast_port, pgm_handle);
|
|
}
|
|
if (udp_encap_mcast_port != 0) {
|
|
dissector_add_uint("udp.port", udp_encap_mcast_port, pgm_handle);
|
|
}
|
|
old_udp_encap_ucast_port = udp_encap_ucast_port;
|
|
old_udp_encap_mcast_port = udp_encap_mcast_port;
|
|
}
|
|
|
|
/*
|
|
* Editor modelines - http://www.wireshark.org/tools/modelines.html
|
|
*
|
|
* Local variables:
|
|
* c-basic-offset: 8
|
|
* tab-width: 8
|
|
* indent-tabs-mode: t
|
|
* End:
|
|
*
|
|
* vi: set shiftwidth=8 tabstop=8 noexpandtab:
|
|
* :indentSize=8:tabSize=8:noTabs=false:
|
|
*/
|