forked from osmocom/wireshark
![Bill Meier](/assets/img/avatar_default.png)
Change-Id: I4667fd4091c510a4c798f79dae333a07dc42dad6 Reviewed-on: https://code.wireshark.org/review/8880 Reviewed-by: Bill Meier <wmeier@newsguy.com>
1889 lines
69 KiB
C
1889 lines
69 KiB
C
/* packet-pim.c
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* Routines for PIM disassembly
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* (c) Copyright Jun-ichiro itojun Hagino <itojun@itojun.org>
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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 1998 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/ipproto.h>
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#include <epan/afn.h>
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#include <epan/prefs.h>
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#include <epan/in_cksum.h>
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#include <epan/to_str.h>
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#include "packet-igmp.h"
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void proto_register_pim(void);
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void proto_reg_handoff_pim(void);
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#define PIM_TYPE(x) ((x) & 0x0f)
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#define PIM_VER(x) (((x) & 0xf0) >> 4)
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#define PIM_BIDIR_SUBTYPE(x) ((x) & 0x0f)
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#define PIM_BIDIR_RSVD(x) (((x) & 0xf0) >> 4)
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/* PIM message type */
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#define PIM_TYPE_HELLO 0 /* Hello [RFC3973][RFC4601] */
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#define PIM_TYPE_REGISTER 1 /* Register [RFC4601] */
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#define PIM_TYPE_REGISTER_STOP 2 /* Register Stop [RFC4601] */
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#define PIM_TYPE_JOIN_PRUNE 3 /* Join/Prune [RFC3973][RFC4601] */
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#define PIM_TYPE_BOOTSTRAP 4 /* Bootstrap [RFC4601] */
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#define PIM_TYPE_ASSERT 5 /* Assert [RFC3973][RFC4601] */
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#define PIM_TYPE_GRAFT 6 /* Graft [RFC3973] */
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#define PIM_TYPE_GRAFT_ACK 7 /* Graft-Ack [RFC3973] */
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#define PIM_TYPE_CAND_RP_ADV 8 /* Candidate RP Advertisement [RFC4601] */
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#define PIM_TYPE_STATE_REFRESH 9 /* State Refresh [RFC3973] */
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#define PIM_TYPE_DF_ELECT 10 /* DF Election [RFC5015] */
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#define PIM_TYPE_ECMP_REDIR 11 /* ECMP Redirect [RFC6754] */
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/* PIM Message hello options */
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#define PIM_HELLO_HOLD_T 1 /* Hold Time [RFC4601] */
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#define PIM_HELLO_LAN_PRUNE_DELAY 2 /*LAN Prune Delay [RFC3973] */
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#define PIM_HELLO_LABEL_PARA 17 /* Label Parameters [Dino_Farinacci] */
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#define PIM_HELLO_DR_PRIORITY 19 /* DR Priority */
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#define PIM_HELLO_GEN_ID 20 /* Generation ID [RFC3973] */
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#define PIM_HELLO_STATE_REFRESH 21 /* State-Refresh [RFC3973] */
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#define PIM_HELLO_BIDIR_CAPA 22 /* Bidirectional Capable [RFC5015] */
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#define PIM_HELLO_VCI_CAPA 23 /* VCI Capability */
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#define PIM_HELLO_VAR_ADDR_LST 24 /* variable Address List [RFC4601] */
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#define PIM_HELLO_VAR_NEIG_LST 25 /* variable Neighbor List TLV */
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#define PIM_HELL0_JOIN_ATTR 26 /* Join Attribute [RFC5384] */
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#define PIM_HELLO_O_TCP_CAPA 27 /* variable PIM-over-TCP-Capable */
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#define PIM_HELLO_O_SCTP_CAPA 28 /* variable PIM-over-SCTP-Capable */
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#define PIM_HELLO_VAR_POP_COUNT 29 /* variable Pop-Count [RFC6807] */
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#define PIM_HELLO_MT_ID 30 /* PIM MT-ID [RFC6420] */
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#define PIM_HELLO_INT_ID 31 /* Interface ID [RFC6395] */
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#define PIM_HELLO_ECMP_REDIR 32 /* PIM ECMP Redirect Hello Option [RFC6754] */
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#define PIM_HELLO_VPC_PEER_ID 33 /* 2 vPC Peer ID */
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#define PIM_HELLO_DR_LB_CAPA 34 /* variable DR Load Balancing Capability [draft-ietf-pim-drlb] */
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#define PIM_HELLO_LB_GDR 35 /* variable DR Load Balancing GDR (LBGDR) [draft-ietf-pim-drlb] */
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/* PIM BIDIR DF election messages */
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#define PIM_BDIR_DF_OFFER 1
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#define PIM_BDIR_DF_WINNER 2
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#define PIM_BDIR_DF_BACKOFF 3
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#define PIM_BDIR_DF_PASS 4
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static const value_string pimtypevals[] = {
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{ PIM_TYPE_HELLO, "Hello" },
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{ PIM_TYPE_REGISTER, "Register" },
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{ PIM_TYPE_REGISTER_STOP, "Register-stop" },
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{ PIM_TYPE_JOIN_PRUNE, "Join/Prune" },
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{ PIM_TYPE_BOOTSTRAP, "Bootstrap" },
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{ PIM_TYPE_ASSERT, "Assert" },
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{ PIM_TYPE_GRAFT, "Graft" },
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{ PIM_TYPE_GRAFT_ACK, "Graft-Ack" },
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{ PIM_TYPE_CAND_RP_ADV, "Candidate-RP-Advertisement" },
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{ PIM_TYPE_STATE_REFRESH, "State-Refresh" },
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{ PIM_TYPE_DF_ELECT, "DF election"},
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{ PIM_TYPE_ECMP_REDIR, "ECMP redirect" },
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{ 0, NULL }
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};
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static const value_string pimbdirdfvals[] = {
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{ PIM_BDIR_DF_OFFER, "offer"},
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{ PIM_BDIR_DF_WINNER, "DF Winner"},
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{ PIM_BDIR_DF_BACKOFF, "DF Backoff"},
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{ PIM_BDIR_DF_PASS, "DF Pass"},
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{ 0, NULL }
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};
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static const value_string pim_opt_vals[] = {
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{1, "Hold Time"},
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{2, "LAN Prune Delay"},
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{18, "Deprecated and should not be used"},
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{19, "DR Priority"},
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{20, "Generation ID"},
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{21, "State Refresh Capable"},
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{22, "Bidir Capable"},
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{24, "Address List"},
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{65001, "Address List"}, /* old implementation */
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{0, NULL}
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};
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enum pimv2_addrtype {
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pimv2_unicast, pimv2_group, pimv2_source
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};
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static int proto_pim = -1;
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static int hf_pim_version = -1;
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static int hf_pim_type = -1;
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static int hf_pim_code = -1;
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static int hf_pim_igmp_type = -1;
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static int hf_pim_df_elect_subtype = -1;
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static int hf_pim_df_elect_rsvd = -1;
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static int hf_pim_cksum = -1;
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static int hf_pim_res_bytes = -1;
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/* PIM Hello options (RFC 4601, section 4.9.2 and RFC 3973, section 4.7.5) */
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static int hf_pim_option = -1;
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static int hf_pim_optiontype = -1;
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static int hf_pim_optionlength = -1;
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static int hf_pim_optionvalue = -1;
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static int hf_pim_register_flag = -1;
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static int hf_pim_register_flag_border = -1;
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static int hf_pim_register_flag_null_register = -1;
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static int hf_pim_mode = -1;
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static int hf_pim_holdtime = -1;
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static int hf_pim_numgroups = -1;
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static int hf_pim_numjoins = -1;
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static int hf_pim_numprunes = -1;
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static int hf_pim_t = -1;
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static int hf_pim_propagation_delay = -1;
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static int hf_pim_override_interval = -1;
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static int hf_pim_dr_priority = -1;
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static int hf_pim_generation_id = -1;
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static int hf_pim_state_refresh_version = -1;
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static int hf_pim_state_refresh_interval = -1;
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static int hf_pim_state_refresh_reserved = -1;
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/* Assert fields */
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static int hf_pim_rpt = -1;
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static int hf_pim_metric_pref = -1;
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static int hf_pim_df_metric_pref = -1;
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static int hf_pim_metric = -1;
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static int hf_pim_prune_indicator = -1;
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static int hf_pim_prune_now = -1;
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static int hf_pim_assert_override = -1;
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static int hf_pim_ip_version = -1;
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static int hf_pim_dummy_header = -1;
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static int hf_pim_source_ip4 = -1;
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static int hf_pim_source_ip6 = -1;
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static int hf_pim_group_ip4 = -1;
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static int hf_pim_group_ip6 = -1;
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static int hf_pim_group_mask_ip4 = -1;
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static int hf_pim_upstream_neighbor_ip4 = -1;
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static int hf_pim_upstream_neighbor_ip6 = -1;
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static int hf_pim_join_ip4 = -1;
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static int hf_pim_join_ip6 = -1;
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static int hf_pim_prune_ip4 = -1;
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static int hf_pim_prune_ip6 = -1;
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static int hf_pim_address_list_ip4 = -1;
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static int hf_pim_address_list_ip6 = -1;
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static int hf_pim_bsr_ip4 = -1;
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static int hf_pim_bsr_ip6 = -1;
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static int hf_pim_rp_ip4 = -1;
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static int hf_pim_rp_ip6 = -1;
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static int hf_pim_bd_bo_offer_ip4 = -1;
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static int hf_pim_bd_bo_offer_ip6 = -1;
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static int hf_pim_bd_offer_metric_pref = -1;
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static int hf_pim_bd_offer_metric = -1;
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static int hf_pim_bd_offer_interval = -1;
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static int hf_pim_bd_pass_ip4 = -1;
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static int hf_pim_bd_pass_ip6 = -1;
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static int hf_pim_bd_pass_metric_pref = -1;
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static int hf_pim_bd_pass_metric = -1;
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static int hf_pim_originator_ip4 = -1;
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static int hf_pim_originator_ip6 = -1;
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static int hf_pim_group_address_ip4 = -1;
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static int hf_pim_fragment_tag = -1;
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static int hf_pim_hash_mask_len = -1;
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static int hf_pim_bsr_priority = -1;
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static int hf_pim_rp_count = -1;
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static int hf_pim_frp_count = -1;
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static int hf_pim_priority = -1;
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static int hf_pim_prefix_count = -1;
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static int hf_pim_addr_len = -1;
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static int hf_pim_src_flags_a = -1;
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static int hf_pim_src_flags_s = -1;
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static int hf_pim_src_flags_w = -1;
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static int hf_pim_src_flags_r = -1;
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static int hf_pim_src_flags_rsv = -1;
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static int hf_pim_mask_len = -1;
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static int hf_pim_ttl = -1;
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static int hf_pim_interval = -1;
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static gint ett_pim = -1;
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static gint ett_pim_opts = -1;
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static gint ett_pim_opt = -1;
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static dissector_handle_t ip_handle;
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static dissector_handle_t ipv6_handle;
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static gboolean use_main_tree = TRUE;
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/*
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* The Story About Ping^WPIM:
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*
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* http://www.cs.usc.edu/assets/003/83187.pdf
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*
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* dated January 11, 1995, entitled "Protocol Independent Multicast (PIM):
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* Protocol Specification", calls itself draft-ietf-idmr-pim-spec-01,
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* and is in PostScript-converted-to-PDF form. It describes a protocol
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* that runs atop IGMP, with a type of 4 for "Router PIM Messages", and
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* a PIM version number field of 1.
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*
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* https://tools.ietf.org/html/draft-ietf-idmr-pim-sm-spec-00
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*
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* dated September 7, 1995, and
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*
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* http://tools.ietf.org/html/draft-ietf-idmr-pim-spec-02
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*
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* dated September 7, 1995, both entitled "Protocol Independent Multicast-
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* Sparse Mode (PIM-SM): Protocol Specification", describe a protocol that
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* runs atop IGMP, with a type of 4 for "Router PIM Messages", and a PIM
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* version number field of 2.
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*
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* https://tools.ietf.org/html/draft-ietf-idmr-pim-sm-spec-03
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*
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* dated June 6, 1996, and all subsequent drafts, and RFC 2117, dated
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* June 1997, all entitled "Protocol Independent Multicast-Sparse Mode
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* (PIM-SM): Protocol Specification", describe a protocol that runs
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* atop IP, with a protocol number of 103, and with a PIM version number
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* field of 2. RFC 2117 was obsoleted by RFC 2362, which was obsoleted by
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* RFC 4601.
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*
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* None of them, including the PDF from USC, appear to describe the protocol
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* dissected by the dissect_pimv1() code. In particular, none have a
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* packet type value of 8 meaning "Mode"; the PDF from USC doesn't mention
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* it at all, and subsequent drafts and RFC 2117 have (Candidate-)RP-
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* Advertisement. Perhaps what's dissected by dissect_pimv1() was
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* something between the PDF and draft-ietf-idmr-pim-spec-02.
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*
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* Looking at the Dense Mode specs,
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*
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* http://tools.ietf.org/html/draft-ietf-idmr-pim-dm-spec-02
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*
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* entitled "Protocol Independent Multicast-Dense Mode (PIM-DM): Protocol
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* Specification", dated September 1995, describes a protocol that runs
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* atop IGMP, with a type of 4 for "Router PIM Messages", and with a PIM
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* version number field of 2.
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*
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* RFC 3973, entitled "Protocol Independent Multicast-Dense Mode (PIM-DM):
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* Protocol Specification", also describes a protocol that runs atop IP,
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* with a protocol number of 103, and with a PIM version number field of 2.
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*/
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static const gint *pim_src_flags_fields[] = {
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&hf_pim_src_flags_a,
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&hf_pim_src_flags_s,
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&hf_pim_src_flags_w,
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&hf_pim_src_flags_r,
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&hf_pim_src_flags_rsv,
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NULL
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};
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static void
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dissect_pimv1_addr(tvbuff_t *tvb, int offset, proto_tree *pim_tree, int hf_ip) {
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proto_tree_add_bitmask_list(pim_tree, tvb, offset, 1, pim_src_flags_fields, ENC_BIG_ENDIAN);
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offset += 1;
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proto_tree_add_item(pim_tree, hf_pim_mask_len, tvb, offset, 1, ENC_BIG_ENDIAN);
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offset += 1;
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proto_tree_add_item(pim_tree, hf_ip, tvb, offset, 4, ENC_BIG_ENDIAN);
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}
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static const value_string pim_type1_vals[] = {
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{ 0, "Query" },
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{ 1, "Register" },
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{ 2, "Register-stop" },
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{ 3, "Join/Prune" },
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{ 4, "RP-Reachable" },
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{ 5, "Assert" },
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{ 6, "Graft" },
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{ 7, "Graft-Ack" },
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{ 8, "Mode" },
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{ 0, NULL },
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};
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static const value_string pimv1_modevals[] = {
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{ 0, "Dense" },
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{ 1, "Sparse" },
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{ 2, "Sparse-Dense" },
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{ 0, NULL }
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};
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static const value_string pim_ip_version_vals[] = {
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{ 0, "Dummy Header" },
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{ 4, "IPv4" },
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{ 6, "IPv6" },
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{ 0, NULL }
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};
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/* This function is only called from the IGMP dissector */
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static int
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dissect_pimv1(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_) {
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guint8 pim_type;
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guint8 pim_ver;
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guint length, pim_length;
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guint16 pim_cksum, computed_cksum;
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vec_t cksum_vec[1];
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proto_tree *pim_tree = NULL;
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proto_item *ti;
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proto_tree *pimopt_tree = NULL;
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proto_item *ticksum;
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int offset = 0;
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "PIMv1");
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col_clear(pinfo->cinfo, COL_INFO);
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ti = proto_tree_add_item(tree, proto_pim, tvb, offset, -1, ENC_NA);
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pim_tree = proto_item_add_subtree(ti, ett_pim);
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/* Put IGMP type, 0x14, into the tree */
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proto_tree_add_string(pim_tree, hf_pim_igmp_type, tvb, offset, 0, "PIM (0x14)");
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offset += 1;
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pim_type = tvb_get_guint8(tvb, offset);
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col_add_str(pinfo->cinfo, COL_INFO,
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val_to_str(pim_type, pim_type1_vals, "Unknown (%u)"));
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proto_tree_add_uint(pim_tree, hf_pim_code, tvb, offset, 1, pim_type);
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offset += 1;
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pim_cksum = tvb_get_ntohs(tvb, offset);
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ticksum = proto_tree_add_item(pim_tree, hf_pim_cksum, tvb, offset, 2, ENC_BIG_ENDIAN);
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pim_ver = PIM_VER(tvb_get_guint8(tvb, offset + 2));
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if (pim_ver != 1) {
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/*
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* Not PIMv1; should we bother dissecting the PIM drafts
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* with a version number of 2 and with PIM running atop
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* IGMP?
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*/
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offset += 2;
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proto_tree_add_item(pim_tree, hf_pim_version, tvb, offset, 1, ENC_BIG_ENDIAN);
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return offset+tvb_reported_length_remaining(tvb, offset);
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}
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/*
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* Well, it's PIM v1, so we can check whether this is a
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* Register message, and thus can figure out how much to
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* checksum and whether to make the columns read-only.
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*/
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length = tvb_reported_length(tvb);
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if (pim_type == 1) {
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/*
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* Register message - the PIM header is 8 bytes long.
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* Also set the columns non-writable. Otherwise the IPv4 or
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* IPv6 dissector for the encapsulated packet that caused
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* this register will overwrite the PIM info in the columns.
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*
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* XXX - that's not what draft-ietf-idmr-pim-spec-01 or
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* draft-ietf-idmr-pim-spec-02 say; they say that the checksum
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* covers the entire IGMP message. Later drafts say it
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* doesn't cover the encapsulated packet; perhaps that's what
|
|
* was always intended, and they just felt they needed to
|
|
* explicitly state that.
|
|
*/
|
|
pim_length = 8;
|
|
col_set_writable(pinfo->cinfo, FALSE);
|
|
} else {
|
|
/*
|
|
* Other message - checksum the entire packet.
|
|
*/
|
|
pim_length = length;
|
|
}
|
|
|
|
if (!pinfo->fragmented && length >= pim_length &&
|
|
tvb_captured_length(tvb) >= pim_length) {
|
|
/*
|
|
* The packet isn't part of a fragmented datagram and isn't
|
|
* truncated, so we can checksum it.
|
|
*/
|
|
SET_CKSUM_VEC_TVB(cksum_vec[0], tvb, 0, pim_length);
|
|
computed_cksum = in_cksum(&cksum_vec[0], 1);
|
|
if (computed_cksum == 0) {
|
|
proto_item_append_text(ticksum, " [correct]");
|
|
} else {
|
|
proto_item_append_text(ticksum, " [incorrect, should be 0x%04x]", in_cksum_shouldbe(pim_cksum, computed_cksum));
|
|
}
|
|
}
|
|
offset += 2;
|
|
|
|
proto_tree_add_item(pim_tree, hf_pim_version, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset += 1;
|
|
|
|
/* reserved stuff */
|
|
proto_tree_add_item(pim_tree, hf_pim_res_bytes, tvb, offset, 3, ENC_NA);
|
|
offset += 3;
|
|
|
|
if (tvb_reported_length_remaining(tvb, offset) > 0) {
|
|
proto_item *subitem;
|
|
subitem = proto_tree_add_item(pim_tree, hf_pim_option, tvb, offset, -1, ENC_NA);
|
|
pimopt_tree = proto_item_add_subtree(subitem, ett_pim_opts);
|
|
} else
|
|
return offset;
|
|
|
|
/* version 1 decoder */
|
|
switch (pim_type) {
|
|
case 0: /* query */
|
|
{
|
|
guint32 holdtime;
|
|
proto_item *ti_hold;
|
|
|
|
proto_tree_add_item(pimopt_tree, hf_pim_mode, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset += 2;
|
|
|
|
ti_hold = proto_tree_add_item_ret_uint(pimopt_tree, hf_pim_holdtime, tvb,
|
|
offset, 2, ENC_BIG_ENDIAN, &holdtime);
|
|
if(holdtime == 0xFFFF){
|
|
proto_item_append_text(ti_hold, " (Infinity)");
|
|
}
|
|
offset += 2;
|
|
break;
|
|
}
|
|
|
|
case 1: /* register */
|
|
{
|
|
guint8 v_hl;
|
|
tvbuff_t *next_tvb;
|
|
|
|
/*
|
|
* The rest of the packet is a multicast data packet.
|
|
*/
|
|
next_tvb = tvb_new_subset_remaining(tvb, offset);
|
|
|
|
/*
|
|
* It's an IP packet - determine whether it's IPv4 or IPv6.
|
|
*/
|
|
v_hl = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_item(pimopt_tree, hf_pim_ip_version, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
|
|
switch((v_hl & 0xf0) >> 4) {
|
|
case 0: /* Null-Register dummy header.
|
|
* Has the same address family as the encapsulating PIM packet,
|
|
* e.g. an IPv6 data packet is encapsulated in IPv6 PIM packet.
|
|
*/
|
|
ti = proto_tree_add_item(pimopt_tree, hf_pim_dummy_header, tvb, offset, -1, ENC_NA);
|
|
if (pinfo->src.type == AT_IPv4) {
|
|
proto_item_append_text(ti, " IPv4");
|
|
proto_tree_add_item(pimopt_tree, hf_pim_source_ip4, tvb, offset + 12, 4, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(pimopt_tree, hf_pim_group_ip4, tvb, offset + 16, 4, ENC_BIG_ENDIAN);
|
|
} else if (pinfo->src.type == AT_IPv6) {
|
|
proto_item_append_text(ti, " IPv6");
|
|
proto_tree_add_item(pimopt_tree, hf_pim_source_ip6, tvb, offset + 8, 16, ENC_NA);
|
|
proto_tree_add_item(pimopt_tree, hf_pim_group_ip6, tvb, offset + 8 + 16, 16, ENC_NA);
|
|
} else
|
|
proto_item_append_text(ti, " for an unknown protocol");
|
|
|
|
break;
|
|
case 4: /* IPv4 */
|
|
if (use_main_tree) {
|
|
call_dissector(ip_handle, next_tvb, pinfo, tree);
|
|
} else {
|
|
call_dissector(ip_handle, next_tvb, pinfo, pimopt_tree);
|
|
}
|
|
break;
|
|
case 6: /* IPv6 */
|
|
if (use_main_tree) {
|
|
call_dissector(ipv6_handle, next_tvb, pinfo, tree);
|
|
} else {
|
|
call_dissector(ipv6_handle, next_tvb, pinfo, pimopt_tree);
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
|
|
case 2: /* register-stop */
|
|
{
|
|
proto_tree_add_item(pimopt_tree, hf_pim_group_ip4, tvb, offset, 4, ENC_BIG_ENDIAN);
|
|
offset += 4;
|
|
proto_tree_add_item(pimopt_tree, hf_pim_source_ip4, tvb, offset, 4, ENC_BIG_ENDIAN);
|
|
offset += 4;
|
|
break;
|
|
}
|
|
|
|
case 3: /* join/prune */
|
|
case 6: /* graft */
|
|
case 7: /* graft-ack */
|
|
{
|
|
int off;
|
|
int ngroup, i, njoin, nprune, j;
|
|
guint32 holdtime;
|
|
proto_tree *grouptree = NULL;
|
|
proto_item *tigroup;
|
|
proto_tree *subtree = NULL;
|
|
proto_item *tisub;
|
|
proto_item *ti_hold;
|
|
|
|
proto_tree_add_item(pimopt_tree, hf_pim_upstream_neighbor_ip4, tvb, offset, 4, ENC_BIG_ENDIAN);
|
|
offset += 4;
|
|
|
|
/* reserved stuff */
|
|
proto_tree_add_item(pim_tree, hf_pim_res_bytes, tvb, offset, 2, ENC_NA);
|
|
offset += 2;
|
|
|
|
ti_hold = proto_tree_add_item_ret_uint(pimopt_tree, hf_pim_holdtime, tvb,
|
|
offset, 2, ENC_BIG_ENDIAN, &holdtime);
|
|
if(holdtime == 0xFFFF){
|
|
proto_item_append_text(ti_hold, " (Infinity)");
|
|
}
|
|
offset += 2;
|
|
|
|
/* reserved stuff */
|
|
proto_tree_add_item(pim_tree, hf_pim_res_bytes, tvb, offset, 1, ENC_NA);
|
|
offset += 1;
|
|
|
|
proto_tree_add_item(pimopt_tree, hf_pim_mask_len, tvb, offset, 1, ENC_NA);
|
|
offset += 1;
|
|
|
|
proto_tree_add_item(pimopt_tree, hf_pim_addr_len, tvb, offset, 1, ENC_NA);
|
|
offset += 1;
|
|
|
|
ngroup = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_item(pimopt_tree, hf_pim_numgroups, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset += 1;
|
|
|
|
for (i = 0; i < ngroup; i++) {
|
|
/*
|
|
* XXX - does the group address have the length "adr_len"
|
|
* and the group mask the length "mask_len"?
|
|
*/
|
|
tigroup = proto_tree_add_ipv4_format(pimopt_tree, hf_pim_group_ip4, tvb, offset, 4,
|
|
tvb_get_ipv4(tvb, offset), "Group %d: %s", i, tvb_ip_to_str(tvb, offset));
|
|
grouptree = proto_item_add_subtree(tigroup, ett_pim);
|
|
offset += 4;
|
|
|
|
proto_tree_add_ipv4_format(grouptree, hf_pim_group_mask_ip4, tvb, offset, 4,
|
|
tvb_get_ipv4(tvb, offset), "Group %d Mask: %s", i, tvb_ip_to_str(tvb, offset));
|
|
offset += 4;
|
|
|
|
njoin = tvb_get_ntohs(tvb, offset);
|
|
nprune = tvb_get_ntohs(tvb, offset + 2);
|
|
tisub = proto_tree_add_item(grouptree, hf_pim_numjoins, tvb,
|
|
offset, 2, ENC_BIG_ENDIAN);
|
|
subtree = proto_item_add_subtree(tisub, ett_pim);
|
|
off = offset + 4;
|
|
for (j = 0; j < njoin; j++) {
|
|
dissect_pimv1_addr(tvb, off, subtree, hf_pim_join_ip4);
|
|
off += 6;
|
|
}
|
|
|
|
tisub = proto_tree_add_item(grouptree, hf_pim_numprunes, tvb,
|
|
offset + 2, 2, ENC_BIG_ENDIAN);
|
|
subtree = proto_item_add_subtree(tisub, ett_pim);
|
|
for (j = 0; j < nprune; j++) {
|
|
dissect_pimv1_addr(tvb, off, subtree, hf_pim_prune_ip4);
|
|
off += 6;
|
|
}
|
|
offset = off;
|
|
}
|
|
break;
|
|
}
|
|
|
|
case 4: /* rp-reachability */
|
|
{
|
|
guint32 holdtime;
|
|
proto_item *ti_hold;
|
|
|
|
proto_tree_add_item(pimopt_tree, hf_pim_group_address_ip4, tvb, offset, 4, ENC_BIG_ENDIAN);
|
|
offset += 4;
|
|
|
|
proto_tree_add_item(pimopt_tree, hf_pim_group_mask_ip4, tvb, offset, 4, ENC_BIG_ENDIAN);
|
|
offset += 4;
|
|
|
|
proto_tree_add_item(pimopt_tree, hf_pim_rp_ip4, tvb, offset, 4, ENC_BIG_ENDIAN);
|
|
offset += 4;
|
|
|
|
/* reserved stuff */
|
|
proto_tree_add_item(pim_tree, hf_pim_res_bytes, tvb, offset, 2, ENC_NA);
|
|
offset += 2;
|
|
|
|
ti_hold = proto_tree_add_item_ret_uint(pimopt_tree, hf_pim_holdtime, tvb,
|
|
offset, 2, ENC_BIG_ENDIAN, &holdtime);
|
|
if(holdtime == 0xFFFF){
|
|
proto_item_append_text(ti_hold, " (Infinity)");
|
|
}
|
|
offset += 2;
|
|
break;
|
|
}
|
|
|
|
case 5: /* assert */
|
|
{
|
|
|
|
proto_tree_add_item(pimopt_tree, hf_pim_group_address_ip4, tvb, offset, 4, ENC_BIG_ENDIAN);
|
|
offset += 4;
|
|
|
|
proto_tree_add_item(pimopt_tree, hf_pim_group_mask_ip4, tvb, offset, 4, ENC_BIG_ENDIAN);
|
|
offset += 4;
|
|
|
|
proto_tree_add_item(pimopt_tree, hf_pim_rpt, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(pimopt_tree, hf_pim_metric_pref, tvb,
|
|
offset, 4, ENC_BIG_ENDIAN);
|
|
offset += 4;
|
|
|
|
proto_tree_add_item(pimopt_tree, hf_pim_metric, tvb, offset, 4, ENC_BIG_ENDIAN);
|
|
offset += 4;
|
|
break;
|
|
}
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return offset;
|
|
}
|
|
|
|
static gboolean
|
|
dissect_pim_addr(proto_tree* tree, tvbuff_t *tvb, int offset, enum pimv2_addrtype at,
|
|
const char* label, proto_item** ret_item, int hf_ip4, int hf_ip6, int *advance) {
|
|
guint8 af, et, flags, mask_len;
|
|
struct e_in6_addr ipv6;
|
|
guint32 ipv4;
|
|
proto_item* ti = NULL;
|
|
int len = 0;
|
|
|
|
af = tvb_get_guint8(tvb, offset);
|
|
if (af != AFNUM_INET && af != AFNUM_INET6) {
|
|
/*
|
|
* We don't handle the other formats, and addresses don't include
|
|
* a length field, so we can't even show them as raw bytes.
|
|
*/
|
|
return FALSE;
|
|
}
|
|
|
|
et = tvb_get_guint8(tvb, offset + 1);
|
|
if (et != 0) {
|
|
/*
|
|
* The only defined encoding type is 0, for the native encoding;
|
|
* again, as addresses don't include a length field, we can't
|
|
* even show addresses with a different encoding type as raw
|
|
* bytes.
|
|
*/
|
|
return FALSE;
|
|
}
|
|
|
|
switch (at) {
|
|
case pimv2_unicast:
|
|
switch (af) {
|
|
case AFNUM_INET:
|
|
len = 4;
|
|
ipv4 = tvb_get_ipv4(tvb, offset + 2);
|
|
if (label)
|
|
{
|
|
ti = proto_tree_add_ipv4_format(tree, hf_ip4, tvb, offset, 2 + len,
|
|
ipv4, "%s: %s", label, tvb_ip_to_str(tvb, offset + 2));
|
|
}
|
|
else
|
|
{
|
|
ti = proto_tree_add_ipv4(tree, hf_ip4, tvb, offset, 2 + len, ipv4);
|
|
}
|
|
break;
|
|
|
|
case AFNUM_INET6:
|
|
len = 16;
|
|
tvb_get_ipv6(tvb, offset + 2, &ipv6);
|
|
if (label)
|
|
{
|
|
ti = proto_tree_add_ipv6_format(tree, hf_ip6, tvb, offset, 2 + len,
|
|
(guint8 *)&ipv6, "%s: %s", label, tvb_ip6_to_str(tvb, offset + 2));
|
|
}
|
|
else
|
|
{
|
|
ti = proto_tree_add_ipv6(tree, hf_ip6, tvb, offset, 2 + len, (guint8 *)&ipv6);
|
|
}
|
|
break;
|
|
}
|
|
*advance = 2 + len;
|
|
break;
|
|
|
|
case pimv2_group:
|
|
mask_len = tvb_get_guint8(tvb, offset + 3);
|
|
switch (af) {
|
|
case AFNUM_INET:
|
|
len = 4;
|
|
ipv4 = tvb_get_ipv4(tvb, offset + 4);
|
|
if (label)
|
|
{
|
|
ti = proto_tree_add_ipv4_format(tree, hf_ip4, tvb, offset, 4 + len,
|
|
ipv4, "%s: %s", label, tvb_ip_to_str(tvb, offset + 4));
|
|
}
|
|
else
|
|
{
|
|
ti = proto_tree_add_ipv4(tree, hf_ip4, tvb, offset, 4 + len, ipv4);
|
|
}
|
|
|
|
proto_item_append_text(ti, "/%u", mask_len);
|
|
break;
|
|
|
|
case AFNUM_INET6:
|
|
len = 16;
|
|
tvb_get_ipv6(tvb, offset + 4, &ipv6);
|
|
if (label)
|
|
{
|
|
ti = proto_tree_add_ipv6_format(tree, hf_ip6, tvb, offset, 4 + len,
|
|
(guint8 *)&ipv6, "%s: %s", label, tvb_ip6_to_str(tvb, offset + 4));
|
|
}
|
|
else
|
|
{
|
|
ti = proto_tree_add_ipv6(tree, hf_ip6, tvb, offset, 4 + len, (guint8 *)&ipv6);
|
|
}
|
|
proto_item_append_text(ti, "/%u", mask_len);
|
|
break;
|
|
}
|
|
*advance = 4 + len;
|
|
break;
|
|
|
|
case pimv2_source:
|
|
flags = tvb_get_guint8(tvb, offset + 2);
|
|
mask_len = tvb_get_guint8(tvb, offset + 3);
|
|
switch (af) {
|
|
case AFNUM_INET:
|
|
len = 4;
|
|
ipv4 = tvb_get_ipv4(tvb, offset + 4);
|
|
if (label)
|
|
{
|
|
ti = proto_tree_add_ipv4_format(tree, hf_ip4, tvb, offset, 4 + len,
|
|
ipv4, "%s: %s", label, tvb_ip_to_str(tvb, offset + 4));
|
|
}
|
|
else
|
|
{
|
|
ti = proto_tree_add_ipv4_format_value(tree, hf_ip4, tvb, offset, 4 + len, ipv4,
|
|
"%s", tvb_ip_to_str(tvb, offset + 4));
|
|
}
|
|
proto_item_append_text(ti, "/%u", mask_len);
|
|
break;
|
|
|
|
case AFNUM_INET6:
|
|
len = 16;
|
|
tvb_get_ipv6(tvb, offset + 4, &ipv6);
|
|
if (label)
|
|
{
|
|
ti = proto_tree_add_ipv6_format(tree, hf_ip6, tvb, offset, 4 + len,
|
|
(guint8 *)&ipv6, "%s: %s", label, tvb_ip6_to_str(tvb, offset + 4));
|
|
}
|
|
else
|
|
{
|
|
ti = proto_tree_add_ipv6_format_value(tree, hf_ip6, tvb, offset, 4 + len, (guint8 *)&ipv6,
|
|
"%s", tvb_ip6_to_str(tvb, offset + 4));
|
|
}
|
|
proto_item_append_text(ti, "/%u", mask_len);
|
|
break;
|
|
}
|
|
if (flags) {
|
|
proto_item_append_text(ti, " (%s%s%s)",
|
|
flags & 0x04 ? "S" : "",
|
|
flags & 0x02 ? "W" : "",
|
|
flags & 0x01 ? "R" : "");
|
|
}
|
|
*advance = 4 + len;
|
|
break;
|
|
default:
|
|
return FALSE;
|
|
}
|
|
|
|
if (ret_item != NULL)
|
|
*ret_item = ti;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/*
|
|
* For PIM v2, see RFC 4601, RFC 3973 and draft-ietf-pim-sm-v2-new-03
|
|
* (when PIM is run over IPv6, the rules for computing the PIM checksum
|
|
* from the draft in question, not from RFC 2362, should be used).
|
|
*/
|
|
static void
|
|
dissect_pim(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) {
|
|
int offset = 0;
|
|
guint8 pim_typever;
|
|
guint8 pim_bidir_subtype = 0;
|
|
guint length, pim_length;
|
|
guint16 pim_cksum, computed_cksum;
|
|
vec_t cksum_vec[4];
|
|
guint32 phdr[2];
|
|
const char *typestr;
|
|
proto_tree *pim_tree = NULL;
|
|
proto_item *ti;
|
|
proto_tree *pimopt_tree = NULL;
|
|
proto_item *tiopt, *ticksum;
|
|
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "PIM");
|
|
col_clear(pinfo->cinfo, COL_INFO);
|
|
|
|
pim_typever = tvb_get_guint8(tvb, 0);
|
|
|
|
switch (PIM_VER(pim_typever)) {
|
|
case 2:
|
|
typestr = val_to_str(PIM_TYPE(pim_typever), pimtypevals, "Unknown (%u)");
|
|
break;
|
|
case 1: /* PIMv1 - we should never see this */
|
|
default:
|
|
typestr = "Unknown";
|
|
break;
|
|
}
|
|
|
|
col_add_fstr(pinfo->cinfo, COL_PROTOCOL, "PIMv%d",
|
|
PIM_VER(pim_typever));
|
|
col_add_str(pinfo->cinfo, COL_INFO, typestr);
|
|
|
|
ti = proto_tree_add_item(tree, proto_pim, tvb, offset, -1, ENC_NA);
|
|
pim_tree = proto_item_add_subtree(ti, ett_pim);
|
|
|
|
proto_tree_add_item(pim_tree, hf_pim_version, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(pim_tree, hf_pim_type, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
if (PIM_TYPE(pim_typever) == PIM_TYPE_DF_ELECT) {
|
|
proto_tree_add_item(pim_tree, hf_pim_df_elect_subtype, tvb, offset + 1, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(pim_tree, hf_pim_df_elect_rsvd, tvb, offset + 1, 1, ENC_BIG_ENDIAN);
|
|
pim_bidir_subtype = tvb_get_guint8(tvb,offset);
|
|
}
|
|
else {
|
|
proto_tree_add_item(pim_tree, hf_pim_res_bytes, tvb, offset + 1, 1, ENC_NA);
|
|
}
|
|
pim_cksum = tvb_get_ntohs(tvb, offset + 2);
|
|
ticksum = proto_tree_add_item(pim_tree, hf_pim_cksum, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
|
|
|
|
if (PIM_VER(pim_typever) != 2) {
|
|
/*
|
|
* We don't know this version, so we don't know how much of the
|
|
* packet the checksum covers.
|
|
*/
|
|
if (tvb_reported_length_remaining(tvb, offset) > 0) {
|
|
proto_tree_add_item(pim_tree, hf_pim_option, tvb, offset, -1, ENC_NA);
|
|
}
|
|
goto done;
|
|
}
|
|
|
|
/*
|
|
* Well, it's PIM v2, so we can check whether this is a Register
|
|
* message, and thus can figure out how much to checksum and
|
|
* whether to make the columns read-only.
|
|
*/
|
|
length = tvb_reported_length(tvb);
|
|
if (PIM_TYPE(pim_typever) == 1) {
|
|
/*
|
|
* Register message - the PIM header is 8 bytes long.
|
|
* Also set the columns non-writable. Otherwise the IPv4 or
|
|
* IPv6 dissector for the encapsulated packet that caused
|
|
* this register will overwrite the PIM info in the columns.
|
|
*/
|
|
pim_length = 8;
|
|
col_set_writable(pinfo->cinfo, FALSE);
|
|
} else {
|
|
/*
|
|
* Other message - checksum the entire packet.
|
|
*/
|
|
pim_length = length;
|
|
}
|
|
if (!pinfo->fragmented && length >= pim_length &&
|
|
tvb_captured_length(tvb) >= pim_length) {
|
|
/*
|
|
* The packet isn't part of a fragmented datagram and isn't
|
|
* truncated, so we can checksum it.
|
|
*/
|
|
|
|
switch (pinfo->src.type) {
|
|
case AT_IPv4:
|
|
SET_CKSUM_VEC_TVB(cksum_vec[0], tvb, 0, pim_length);
|
|
computed_cksum = in_cksum(&cksum_vec[0], 1);
|
|
break;
|
|
case AT_IPv6:
|
|
/* Set up the fields of the pseudo-header. */
|
|
SET_CKSUM_VEC_PTR(cksum_vec[0], (const guint8 *)pinfo->src.data, pinfo->src.len);
|
|
SET_CKSUM_VEC_PTR(cksum_vec[1], (const guint8 *)pinfo->dst.data, pinfo->dst.len);
|
|
phdr[0] = g_htonl(pim_length);
|
|
phdr[1] = g_htonl(IP_PROTO_PIM);
|
|
SET_CKSUM_VEC_PTR(cksum_vec[2], (const guint8 *)&phdr, 8);
|
|
SET_CKSUM_VEC_TVB(cksum_vec[3], tvb, 0, pim_length);
|
|
computed_cksum = in_cksum(&cksum_vec[0], 4);
|
|
break;
|
|
default:
|
|
/* PIM is available for IPv4 and IPv6 right now */
|
|
DISSECTOR_ASSERT_NOT_REACHED();
|
|
break;
|
|
}
|
|
|
|
if (computed_cksum == 0) {
|
|
proto_item_append_text(ticksum, " [correct]");
|
|
|
|
} else {
|
|
proto_item_append_text(ticksum, " [incorrect, should be 0x%04x]", in_cksum_shouldbe(pim_cksum, computed_cksum));
|
|
}
|
|
}
|
|
offset += 4;
|
|
|
|
if (tvb_reported_length_remaining(tvb, offset) > 0) {
|
|
tiopt = proto_tree_add_item(pim_tree, hf_pim_option, tvb, offset, -1, ENC_NA);
|
|
pimopt_tree = proto_item_add_subtree(tiopt, ett_pim_opts);
|
|
} else
|
|
goto done;
|
|
|
|
/* version 2 decoder */
|
|
switch (PIM_TYPE(pim_typever)) {
|
|
case PIM_TYPE_HELLO: /*hello*/
|
|
{
|
|
int opt_count = 0;
|
|
|
|
while (tvb_reported_length_remaining(tvb, offset) >= 2) {
|
|
guint16 hello_opt, opt_len;
|
|
guint32 holdtime;
|
|
proto_item *opt_item;
|
|
proto_item *ti_hold;
|
|
proto_tree *opt_tree;
|
|
|
|
opt_count++;
|
|
hello_opt = tvb_get_ntohs(tvb, offset);
|
|
opt_len = tvb_get_ntohs(tvb, offset + 2);
|
|
opt_tree = proto_tree_add_subtree_format(pimopt_tree, tvb, offset, 4 + opt_len,
|
|
ett_pim_opt, &opt_item, "Option %u: %s", hello_opt,
|
|
val_to_str(hello_opt, pim_opt_vals, "Unknown: %u"));
|
|
proto_tree_add_item(opt_tree, hf_pim_optiontype, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(opt_tree, hf_pim_optionlength, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
|
|
|
|
switch(hello_opt) {
|
|
case PIM_HELLO_HOLD_T: /* Hello Hold Time Option */
|
|
|
|
ti_hold = proto_tree_add_item_ret_uint(pimopt_tree, hf_pim_holdtime, tvb,
|
|
offset, 2, ENC_BIG_ENDIAN, &holdtime);
|
|
switch(holdtime){
|
|
case 0:
|
|
proto_item_append_text(ti_hold, " (goodbye)");
|
|
proto_item_append_text(opt_item, " (goodbye)");
|
|
break;
|
|
case 0xFFFF:
|
|
proto_item_append_text(ti_hold, " (Infinity)");
|
|
proto_item_append_text(opt_item, " (Infinity)");
|
|
break;
|
|
default:
|
|
/* no default action */
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case PIM_HELLO_LAN_PRUNE_DELAY: /* LAN Prune Delay Option */
|
|
proto_tree_add_item(opt_tree, hf_pim_t, tvb, offset + 4, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(opt_tree, hf_pim_propagation_delay, tvb, offset + 4, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(opt_tree, hf_pim_override_interval, tvb, offset + 6, 2, ENC_BIG_ENDIAN);
|
|
proto_item_append_text(opt_item,
|
|
": T = %u, Propagation Delay = %ums, Override Interval = %ums",
|
|
tvb_get_guint8(tvb, offset + 4) & 0x80 ? 1 : 0,
|
|
tvb_get_ntohs(tvb, offset + 4) & 0x7fff,
|
|
tvb_get_ntohs(tvb, offset + 6));
|
|
break;
|
|
|
|
case PIM_HELLO_DR_PRIORITY: /* DR priority */
|
|
proto_tree_add_item(opt_tree, hf_pim_dr_priority, tvb, offset + 4, 4, ENC_BIG_ENDIAN);
|
|
proto_item_append_text(opt_item, ": %u", tvb_get_ntohl(tvb, offset + 4));
|
|
break;
|
|
|
|
case PIM_HELLO_GEN_ID: /* Generation ID */
|
|
proto_tree_add_item(opt_tree, hf_pim_generation_id, tvb, offset + 4, 4, ENC_BIG_ENDIAN);
|
|
proto_item_append_text(opt_item, ": %u", tvb_get_ntohl(tvb, offset + 4));
|
|
break;
|
|
|
|
case PIM_HELLO_STATE_REFRESH: /* State Refresh Capable Option */
|
|
proto_tree_add_item(opt_tree, hf_pim_state_refresh_version, tvb, offset + 4, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(opt_tree, hf_pim_state_refresh_interval, tvb, offset + 5, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(opt_tree, hf_pim_state_refresh_reserved, tvb, offset + 6, 2, ENC_BIG_ENDIAN);
|
|
proto_item_append_text(opt_item, ": Version = %u, Interval = %us",
|
|
tvb_get_guint8(tvb, offset + 4),
|
|
tvb_get_guint8(tvb, offset + 5));
|
|
break;
|
|
|
|
case PIM_HELLO_VAR_ADDR_LST: /* address list */
|
|
case 65001: /* address list (old implementations) */
|
|
{
|
|
int i;
|
|
proto_tree *sub_tree = NULL;
|
|
|
|
sub_tree = proto_tree_add_subtree_format(opt_tree, tvb, offset, 4 + opt_len,
|
|
ett_pim_opt, NULL, "%sAddress List (%u)",
|
|
hello_opt == 65001 ? "old " : "",
|
|
hello_opt);
|
|
for (i = offset + 4; i < offset + 4 + opt_len; ) {
|
|
int advance;
|
|
if (!dissect_pim_addr(sub_tree, tvb, i, pimv2_unicast, NULL, NULL,
|
|
hf_pim_address_list_ip4, hf_pim_address_list_ip6, &advance))
|
|
break;
|
|
i += advance;
|
|
}
|
|
break;
|
|
}
|
|
case PIM_HELLO_LABEL_PARA:
|
|
case PIM_HELLO_BIDIR_CAPA:
|
|
case PIM_HELLO_VCI_CAPA:
|
|
case PIM_HELLO_VAR_NEIG_LST:
|
|
case PIM_HELL0_JOIN_ATTR:
|
|
case PIM_HELLO_O_TCP_CAPA:
|
|
case PIM_HELLO_O_SCTP_CAPA:
|
|
case PIM_HELLO_VAR_POP_COUNT:
|
|
case PIM_HELLO_MT_ID:
|
|
case PIM_HELLO_INT_ID:
|
|
case PIM_HELLO_ECMP_REDIR:
|
|
case PIM_HELLO_VPC_PEER_ID:
|
|
case PIM_HELLO_DR_LB_CAPA:
|
|
case PIM_HELLO_LB_GDR:
|
|
default:
|
|
if (opt_len)
|
|
proto_tree_add_item(opt_tree, hf_pim_optionvalue, tvb,
|
|
offset + 4, opt_len, ENC_NA);
|
|
break;
|
|
}
|
|
offset += 4 + opt_len;
|
|
}
|
|
proto_item_append_text(tiopt, ": %u", opt_count);
|
|
break;
|
|
}
|
|
|
|
case PIM_TYPE_REGISTER: /* register */
|
|
{
|
|
guint8 v_hl;
|
|
tvbuff_t *next_tvb;
|
|
proto_tree *flag_tree;
|
|
proto_item *tiflag;
|
|
|
|
tiflag = proto_tree_add_item(pimopt_tree, hf_pim_register_flag, tvb, offset, 4, ENC_BIG_ENDIAN);
|
|
flag_tree = proto_item_add_subtree(tiflag, ett_pim);
|
|
proto_tree_add_item(flag_tree, hf_pim_register_flag_border, tvb, offset, 4, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(flag_tree, hf_pim_register_flag_null_register, tvb, offset, 4, ENC_BIG_ENDIAN);
|
|
offset += 4;
|
|
|
|
/*
|
|
* The rest of the packet is a multicast data packet.
|
|
*/
|
|
next_tvb = tvb_new_subset_remaining(tvb, offset);
|
|
|
|
/*
|
|
* It's an IP packet - determine whether it's IPv4 or IPv6.
|
|
*/
|
|
v_hl = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_item(pimopt_tree, hf_pim_ip_version, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
|
|
switch((v_hl & 0xf0) >> 4) {
|
|
case 0: /* Null-Register dummy header.
|
|
* Has the same address family as the encapsulating PIM packet,
|
|
* e.g. an IPv6 data packet is encapsulated in IPv6 PIM packet.
|
|
*/
|
|
ti = proto_tree_add_item(pimopt_tree, hf_pim_dummy_header, tvb, offset, -1, ENC_NA);
|
|
if (pinfo->src.type == AT_IPv4) {
|
|
proto_item_append_text(ti, "IPv4");
|
|
proto_tree_add_item(pimopt_tree, hf_pim_source_ip4, tvb, offset + 12, 4, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(pimopt_tree, hf_pim_group_ip4, tvb, offset + 16, 4, ENC_BIG_ENDIAN);
|
|
} else if (pinfo->src.type == AT_IPv6) {
|
|
proto_item_append_text(ti, "IPv6");
|
|
proto_tree_add_item(pimopt_tree, hf_pim_source_ip6, tvb, offset + 8, 16, ENC_NA);
|
|
proto_tree_add_item(pimopt_tree, hf_pim_group_ip6, tvb, offset + 8 + 16, 16, ENC_NA);
|
|
} else
|
|
proto_item_append_text(ti, "for an unknown protocol");
|
|
break;
|
|
case 4: /* IPv4 */
|
|
if (use_main_tree) {
|
|
call_dissector(ip_handle, next_tvb, pinfo, tree);
|
|
} else {
|
|
call_dissector(ip_handle, next_tvb, pinfo, pimopt_tree);
|
|
}
|
|
break;
|
|
case 6: /* IPv6 */
|
|
if (use_main_tree) {
|
|
call_dissector(ipv6_handle, next_tvb, pinfo, tree);
|
|
} else {
|
|
call_dissector(ipv6_handle, next_tvb, pinfo, pimopt_tree);
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
|
|
case PIM_TYPE_REGISTER_STOP: /* register-stop */
|
|
{
|
|
int advance;
|
|
|
|
if (!dissect_pim_addr(pimopt_tree, tvb, offset, pimv2_group, NULL, NULL,
|
|
hf_pim_group_ip4, hf_pim_group_ip6, &advance))
|
|
break;
|
|
offset += advance;
|
|
if (!dissect_pim_addr(pimopt_tree, tvb, offset, pimv2_unicast, NULL, NULL,
|
|
hf_pim_source_ip4, hf_pim_source_ip6, &advance))
|
|
break;
|
|
break;
|
|
}
|
|
|
|
case PIM_TYPE_JOIN_PRUNE: /* join/prune */
|
|
case PIM_TYPE_GRAFT: /* graft */
|
|
case PIM_TYPE_GRAFT_ACK: /* graft-ack */
|
|
{
|
|
int advance;
|
|
int off;
|
|
int ngroup, i, njoin, nprune, j;
|
|
guint32 holdtime;
|
|
proto_tree *grouptree = NULL;
|
|
proto_item *tigroup;
|
|
proto_tree *subtree = NULL;
|
|
proto_item *tisub;
|
|
proto_item *ti_hold;
|
|
|
|
if (!dissect_pim_addr(pimopt_tree, tvb, offset, pimv2_unicast, NULL, NULL,
|
|
hf_pim_upstream_neighbor_ip4, hf_pim_upstream_neighbor_ip6, &advance))
|
|
break;
|
|
|
|
offset += advance;
|
|
|
|
/* reserved field */
|
|
proto_tree_add_item(pimopt_tree, hf_pim_res_bytes, tvb, offset, 1, ENC_NA);
|
|
offset += 1;
|
|
|
|
ngroup = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_item(pimopt_tree, hf_pim_numgroups, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset += 1;
|
|
|
|
ti_hold = proto_tree_add_item_ret_uint(pimopt_tree, hf_pim_holdtime, tvb,
|
|
offset, 2, ENC_BIG_ENDIAN, &holdtime);
|
|
if(holdtime == 0xFFFF){
|
|
proto_item_append_text(ti_hold, " (Infinity)");
|
|
}
|
|
offset += 2;
|
|
|
|
for (i = 0; i < ngroup; i++) {
|
|
if (!dissect_pim_addr(pimopt_tree, tvb, offset, pimv2_group,
|
|
wmem_strdup_printf(wmem_packet_scope(), "Group %d", i), &tigroup,
|
|
hf_pim_group_ip4, hf_pim_group_ip6, &advance))
|
|
goto breakbreak3;
|
|
|
|
grouptree = proto_item_add_subtree(tigroup, ett_pim);
|
|
offset += advance;
|
|
|
|
njoin = tvb_get_ntohs(tvb, offset);
|
|
nprune = tvb_get_ntohs(tvb, offset + 2);
|
|
tisub = proto_tree_add_item(grouptree, hf_pim_numjoins, tvb,
|
|
offset, 2, ENC_BIG_ENDIAN);
|
|
subtree = proto_item_add_subtree(tisub, ett_pim);
|
|
off = offset + 4;
|
|
for (j = 0; j < njoin; j++) {
|
|
if (!dissect_pim_addr(subtree, tvb, off, pimv2_source, NULL, NULL,
|
|
hf_pim_join_ip4, hf_pim_join_ip6, &advance))
|
|
goto breakbreak3;
|
|
|
|
off += advance;
|
|
}
|
|
|
|
tisub = proto_tree_add_item(grouptree, hf_pim_numprunes, tvb,
|
|
offset + 2, 2, ENC_BIG_ENDIAN);
|
|
subtree = proto_item_add_subtree(tisub, ett_pim);
|
|
for (j = 0; j < nprune; j++) {
|
|
if (!dissect_pim_addr(subtree, tvb, off, pimv2_source, NULL, NULL,
|
|
hf_pim_prune_ip4, hf_pim_prune_ip6, &advance))
|
|
goto breakbreak3;
|
|
|
|
off += advance;
|
|
}
|
|
offset = off;
|
|
}
|
|
breakbreak3:
|
|
break;
|
|
}
|
|
|
|
case PIM_TYPE_BOOTSTRAP: /* bootstrap */
|
|
{
|
|
int advance;
|
|
int i, j;
|
|
int frpcnt;
|
|
guint32 holdtime;
|
|
proto_tree *grouptree = NULL;
|
|
proto_item *tigroup;
|
|
proto_item *ti_hold;
|
|
|
|
proto_tree_add_item(pimopt_tree, hf_pim_fragment_tag, tvb,
|
|
offset, 2, ENC_BIG_ENDIAN);
|
|
offset += 2;
|
|
|
|
proto_tree_add_item(pimopt_tree, hf_pim_hash_mask_len, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset += 1;
|
|
proto_tree_add_item(pimopt_tree, hf_pim_bsr_priority, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset += 1;
|
|
|
|
if (!dissect_pim_addr(pimopt_tree, tvb, offset, pimv2_unicast, NULL, NULL,
|
|
hf_pim_bsr_ip4, hf_pim_bsr_ip6, &advance))
|
|
break;
|
|
offset += advance;
|
|
|
|
for (i = 0; tvb_reported_length_remaining(tvb, offset) > 0; i++) {
|
|
if (!dissect_pim_addr(pimopt_tree, tvb, offset, pimv2_group,
|
|
wmem_strdup_printf(wmem_packet_scope(), "Group %d", i), &tigroup,
|
|
hf_pim_group_ip4, hf_pim_group_ip6, &advance))
|
|
goto breakbreak4;
|
|
|
|
grouptree = proto_item_add_subtree(tigroup, ett_pim);
|
|
offset += advance;
|
|
|
|
proto_tree_add_item(grouptree, hf_pim_rp_count, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset += 1;
|
|
frpcnt = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_item(grouptree, hf_pim_frp_count, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset += 3;
|
|
|
|
for (j = 0; j < frpcnt; j++) {
|
|
if (!dissect_pim_addr(pimopt_tree, tvb, offset, pimv2_unicast,
|
|
wmem_strdup_printf(wmem_packet_scope(), "RP %d", j), NULL,
|
|
hf_pim_rp_ip4, hf_pim_rp_ip6, &advance))
|
|
|
|
goto breakbreak4;
|
|
offset += advance;
|
|
|
|
ti_hold = proto_tree_add_item_ret_uint(pimopt_tree, hf_pim_holdtime, tvb,
|
|
offset, 2, ENC_BIG_ENDIAN, &holdtime);
|
|
if(holdtime == 0xFFFF){
|
|
proto_item_append_text(ti_hold, " (Infinity)");
|
|
}
|
|
offset += 2;
|
|
proto_tree_add_item(grouptree, hf_pim_priority, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset += 1;
|
|
|
|
/* reserved stuff */
|
|
proto_tree_add_item(pim_tree, hf_pim_res_bytes, tvb, offset, 1, ENC_NA);
|
|
offset += 1;
|
|
}
|
|
}
|
|
|
|
breakbreak4:
|
|
break;
|
|
}
|
|
|
|
case PIM_TYPE_ASSERT: /* assert */
|
|
{
|
|
int advance;
|
|
|
|
if (!dissect_pim_addr(pimopt_tree, tvb, offset, pimv2_group,
|
|
NULL, NULL,
|
|
hf_pim_group_ip4, hf_pim_group_ip6, &advance))
|
|
break;
|
|
offset += advance;
|
|
|
|
if (!dissect_pim_addr(pimopt_tree, tvb, offset, pimv2_unicast,
|
|
NULL, NULL,
|
|
hf_pim_source_ip4, hf_pim_source_ip6, &advance))
|
|
break;
|
|
offset += advance;
|
|
|
|
proto_tree_add_item(pimopt_tree, hf_pim_rpt, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(pimopt_tree, hf_pim_metric_pref, tvb,
|
|
offset, 4, ENC_BIG_ENDIAN);
|
|
offset += 4;
|
|
|
|
proto_tree_add_item(pimopt_tree, hf_pim_metric, tvb, offset, 4, ENC_BIG_ENDIAN);
|
|
/* offset += 4;*/
|
|
break;
|
|
}
|
|
|
|
case PIM_TYPE_CAND_RP_ADV: /* Candidate-RP-Advertisement */
|
|
{
|
|
int advance;
|
|
int pfxcnt;
|
|
guint32 holdtime;
|
|
int i;
|
|
proto_item *ti_hold;
|
|
|
|
pfxcnt = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_item(pimopt_tree, hf_pim_prefix_count, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset += 1;
|
|
proto_tree_add_item(pimopt_tree, hf_pim_priority, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset += 1;
|
|
|
|
ti_hold = proto_tree_add_item_ret_uint(pimopt_tree, hf_pim_holdtime, tvb,
|
|
offset, 2, ENC_BIG_ENDIAN, &holdtime);
|
|
if(holdtime == 0xFFFF){
|
|
proto_item_append_text(ti_hold, " (Infinity)");
|
|
}
|
|
offset += 2;
|
|
|
|
if (!dissect_pim_addr(pimopt_tree, tvb, offset, pimv2_unicast,
|
|
NULL, NULL,
|
|
hf_pim_rp_ip4, hf_pim_rp_ip6, &advance))
|
|
break;
|
|
offset += advance;
|
|
|
|
for (i = 0; i < pfxcnt; i++) {
|
|
if (!dissect_pim_addr(pimopt_tree, tvb, offset, pimv2_group,
|
|
wmem_strdup_printf(wmem_packet_scope(), "Group %d", i), NULL,
|
|
hf_pim_group_ip4, hf_pim_group_ip6, &advance))
|
|
goto breakbreak8;
|
|
offset += advance;
|
|
}
|
|
breakbreak8:
|
|
break;
|
|
}
|
|
|
|
case PIM_TYPE_STATE_REFRESH: /* State-Refresh */
|
|
{
|
|
int advance;
|
|
|
|
if (!dissect_pim_addr(pimopt_tree, tvb, offset, pimv2_group,
|
|
NULL, NULL,
|
|
hf_pim_group_ip4, hf_pim_group_ip6, &advance))
|
|
break;
|
|
offset += advance;
|
|
|
|
if (!dissect_pim_addr(pimopt_tree, tvb, offset, pimv2_unicast,
|
|
NULL, NULL,
|
|
hf_pim_source_ip4, hf_pim_source_ip6, &advance))
|
|
break;
|
|
offset += advance;
|
|
|
|
if (!dissect_pim_addr(pimopt_tree, tvb, offset, pimv2_unicast,
|
|
NULL, NULL,
|
|
hf_pim_originator_ip4, hf_pim_originator_ip6, &advance))
|
|
break;
|
|
offset += advance;
|
|
|
|
proto_tree_add_item(pimopt_tree, hf_pim_rpt, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(pimopt_tree, hf_pim_metric_pref, tvb,
|
|
offset, 4, ENC_BIG_ENDIAN);
|
|
offset += 4;
|
|
|
|
proto_tree_add_item(pimopt_tree, hf_pim_metric, tvb, offset, 4, ENC_BIG_ENDIAN);
|
|
offset += 4;
|
|
|
|
proto_tree_add_item(pimopt_tree, hf_pim_mask_len, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset += 1;
|
|
|
|
proto_tree_add_item(pimopt_tree, hf_pim_ttl, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset += 1;
|
|
|
|
proto_tree_add_item(pimopt_tree, hf_pim_prune_indicator, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(pimopt_tree, hf_pim_prune_now, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(pimopt_tree, hf_pim_assert_override, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset += 1;
|
|
|
|
proto_tree_add_item(pimopt_tree, hf_pim_interval, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
/*offset += 1;*/
|
|
|
|
break;
|
|
}
|
|
|
|
case PIM_TYPE_DF_ELECT:
|
|
{
|
|
int advance;
|
|
|
|
if (!dissect_pim_addr(pimopt_tree, tvb, offset, pimv2_unicast,
|
|
NULL, NULL,
|
|
hf_pim_rp_ip4, hf_pim_rp_ip6, &advance))
|
|
break;
|
|
offset += advance;
|
|
proto_tree_add_item(pimopt_tree, hf_pim_df_metric_pref, tvb,
|
|
offset, 4, ENC_BIG_ENDIAN);
|
|
offset += 4;
|
|
proto_tree_add_item(pimopt_tree, hf_pim_metric, tvb, offset, 4, ENC_BIG_ENDIAN);
|
|
offset += 4;
|
|
|
|
switch(PIM_BIDIR_SUBTYPE(pim_bidir_subtype)) {
|
|
case PIM_BDIR_DF_BACKOFF :
|
|
if (!dissect_pim_addr(pimopt_tree, tvb, offset, pimv2_unicast,
|
|
NULL, NULL,
|
|
hf_pim_bd_bo_offer_ip4, hf_pim_bd_bo_offer_ip6, &advance))
|
|
break;
|
|
offset += advance;
|
|
proto_tree_add_item(pimopt_tree, hf_pim_bd_offer_metric_pref, tvb, offset, 4, ENC_BIG_ENDIAN);
|
|
offset += 4;
|
|
proto_tree_add_item(pimopt_tree, hf_pim_bd_offer_metric, tvb, offset, 4, ENC_BIG_ENDIAN);
|
|
offset += 4;
|
|
proto_tree_add_item(pimopt_tree, hf_pim_bd_offer_interval, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
break;
|
|
case PIM_BDIR_DF_PASS:
|
|
if (!dissect_pim_addr(pimopt_tree, tvb, offset, pimv2_unicast,
|
|
NULL, NULL,
|
|
hf_pim_bd_pass_ip4, hf_pim_bd_pass_ip6, &advance))
|
|
break;
|
|
offset += advance;
|
|
proto_tree_add_item(pimopt_tree, hf_pim_bd_pass_metric_pref, tvb, offset, 4, ENC_BIG_ENDIAN);
|
|
offset += 4;
|
|
proto_tree_add_item(pimopt_tree, hf_pim_bd_pass_metric, tvb, offset, 4, ENC_BIG_ENDIAN);
|
|
break;
|
|
}
|
|
}
|
|
|
|
default:
|
|
break;
|
|
}
|
|
done:;
|
|
}
|
|
|
|
void
|
|
proto_register_pim(void)
|
|
{
|
|
static hf_register_info hf[] =
|
|
{
|
|
{ &hf_pim_version,
|
|
{ "Version", "pim.version",
|
|
FT_UINT8, BASE_DEC, NULL, 0xf0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_type,
|
|
{ "Type", "pim.type",
|
|
FT_UINT8, BASE_DEC, VALS(pimtypevals), 0x0f,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_df_elect_subtype,
|
|
{ "DF Subtype", "pim.df_elect.subtype",
|
|
FT_UINT8, BASE_DEC, VALS(pimbdirdfvals), 0xf0,
|
|
NULL, HFILL}
|
|
},
|
|
{ &hf_pim_df_elect_rsvd,
|
|
{ "DF reserved", "pim.df_elect.rsvd",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0f,
|
|
NULL, HFILL}
|
|
},
|
|
{ &hf_pim_igmp_type,
|
|
{ "Type", "pim.igmp_type",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_code,
|
|
{ "Code", "pim.code",
|
|
FT_UINT8, BASE_DEC, VALS(pim_type1_vals), 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_cksum,
|
|
{ "Checksum", "pim.cksum",
|
|
FT_UINT16, BASE_HEX, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_res_bytes,
|
|
{ "Reserved byte(s)", "pim.res_bytes",
|
|
FT_BYTES, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_option,
|
|
{ "PIM Options", "pim.option",
|
|
FT_NONE, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_optiontype,
|
|
{ "Type", "pim.optiontype",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_optionlength,
|
|
{ "Length", "pim.optionlength",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_optionvalue,
|
|
{ "Unknown", "pim.optionvalue",
|
|
FT_BYTES, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_register_flag,
|
|
{ "Flags", "pim.register_flag",
|
|
FT_UINT32, BASE_HEX, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_register_flag_border,
|
|
{ "Border", "pim.register_flag.border",
|
|
FT_BOOLEAN, 32, TFS(&tfs_yes_no), 0x80000000,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_register_flag_null_register,
|
|
{ "Null-Register", "pim.register_flag.null_register",
|
|
FT_BOOLEAN, 32, TFS(&tfs_yes_no), 0x40000000,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_mode,
|
|
{ "Mode", "pim.mode",
|
|
FT_UINT8, BASE_DEC, VALS(pimv1_modevals), 0xf0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_holdtime,
|
|
{ "Holdtime", "pim.holdtime",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
"The amount of time a receiver must keep the neighbor "
|
|
"reachable, in seconds.", HFILL }
|
|
},
|
|
{ &hf_pim_numgroups,
|
|
{ "Num Groups", "pim.numgroups",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
"Number of multicast group sets contained in the message.",
|
|
HFILL }
|
|
},
|
|
{ &hf_pim_numjoins,
|
|
{ "Num Joins", "pim.numjoins",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
"Number of joined sources.", HFILL }
|
|
},
|
|
{ &hf_pim_numprunes,
|
|
{ "Num Prunes", "pim.numprunes",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
"Number of pruned sources.", HFILL }
|
|
},
|
|
{ &hf_pim_t,
|
|
{ "T", "pim.t",
|
|
FT_BOOLEAN, 8, NULL, 0x80,
|
|
"Specifies the ability of the sending router to disable joins "
|
|
"suppression.", HFILL }
|
|
},
|
|
{ &hf_pim_propagation_delay,
|
|
{ "Propagation Delay", "pim.propagation_delay",
|
|
FT_UINT16, BASE_DEC, NULL, 0x07fff,
|
|
"Units are milli-seconds", HFILL }
|
|
},
|
|
{ &hf_pim_override_interval,
|
|
{ "Override Interval", "pim.override_interval",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
"Units are milli-seconds", HFILL }
|
|
},
|
|
{ &hf_pim_dr_priority,
|
|
{ "DR Priority", "pim.dr_priority",
|
|
FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_generation_id,
|
|
{ "Generation ID", "pim.generation_id",
|
|
FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_state_refresh_version,
|
|
{ "Version", "pim.state_refresh_version",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_state_refresh_interval,
|
|
{ "Interval", "pim.state_refresh_interval",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
"Units in seconds.", HFILL }
|
|
},
|
|
{ &hf_pim_state_refresh_reserved,
|
|
{ "Reserved", "pim.state_refresh_reserved",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_rpt,
|
|
{ "RP Tree", "pim.rpt",
|
|
FT_BOOLEAN, 8, NULL, 0x80,
|
|
"Set to 1 for assert(*,G) messages and 0 for assert(S,G) "
|
|
"messages.", HFILL }
|
|
},
|
|
{ &hf_pim_metric_pref,
|
|
{ "Metric Preference", "pim.metric_pref",
|
|
FT_UINT32, BASE_DEC, NULL, 0x7fffffff,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_df_metric_pref,
|
|
{ "DF Metric Preference", "pim.metric_pref",
|
|
FT_UINT32, BASE_DEC, NULL, 0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_metric,
|
|
{ "Metric", "pim.metric",
|
|
FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_prune_indicator,
|
|
{ "Prune indicator", "pim.prune_indicator",
|
|
FT_BOOLEAN, 8, TFS(&tfs_set_notset), 0x80,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_prune_now,
|
|
{ "Prune now", "pim.prune_now",
|
|
FT_BOOLEAN, 8, TFS(&tfs_set_notset), 0x40,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_assert_override,
|
|
{ "Assert override", "pim.assert_override",
|
|
FT_BOOLEAN, 8, TFS(&tfs_set_notset), 0x20,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_ip_version,
|
|
{ "IP Version", "pim.ip_version",
|
|
FT_UINT8, BASE_DEC, VALS(pim_ip_version_vals), 0xF0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_dummy_header,
|
|
{ "Dummy Header", "pim.dummy_header",
|
|
FT_NONE, BASE_NONE, NULL, 0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_source_ip4,
|
|
{ "Source", "pim.source",
|
|
FT_IPv4, BASE_NONE, NULL, 0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_source_ip6,
|
|
{ "Source", "pim.source",
|
|
FT_IPv6, BASE_NONE, NULL, 0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_group_ip4,
|
|
{ "Group", "pim.group",
|
|
FT_IPv4, BASE_NONE, NULL, 0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_group_mask_ip4,
|
|
{ "Mask", "pim.group_mask",
|
|
FT_IPv4, BASE_NONE, NULL, 0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_group_ip6,
|
|
{ "Group", "pim.group",
|
|
FT_IPv6, BASE_NONE, NULL, 0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_upstream_neighbor_ip4,
|
|
{ "Upstream-neighbor", "pim.upstream_neighbor",
|
|
FT_IPv4, BASE_NONE, NULL, 0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_upstream_neighbor_ip6,
|
|
{ "Upstream-neighbor", "pim.upstream_neighbor",
|
|
FT_IPv6, BASE_NONE, NULL, 0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_join_ip4,
|
|
{ "IP address", "pim.join_ip",
|
|
FT_IPv4, BASE_NONE, NULL, 0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_join_ip6,
|
|
{ "IP address", "pim.join_ip",
|
|
FT_IPv6, BASE_NONE, NULL, 0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_prune_ip4,
|
|
{ "IP address", "pim.prune_ip",
|
|
FT_IPv4, BASE_NONE, NULL, 0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_prune_ip6,
|
|
{ "IP address", "pim.prune_ip",
|
|
FT_IPv6, BASE_NONE, NULL, 0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_address_list_ip4,
|
|
{ "Address", "pim.address_list",
|
|
FT_IPv4, BASE_NONE, NULL, 0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_address_list_ip6,
|
|
{ "Address", "pim.address_list",
|
|
FT_IPv6, BASE_NONE, NULL, 0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_bsr_ip4,
|
|
{ "BSR", "pim.bsr",
|
|
FT_IPv4, BASE_NONE, NULL, 0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_bsr_ip6,
|
|
{ "BSR", "pim.bsr",
|
|
FT_IPv6, BASE_NONE, NULL, 0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_rp_ip4,
|
|
{ "RP", "pim.rp",
|
|
FT_IPv4, BASE_NONE, NULL, 0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_rp_ip6,
|
|
{ "RP", "pim.rp",
|
|
FT_IPv6, BASE_NONE, NULL, 0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_originator_ip4,
|
|
{ "Originator", "pim.originator",
|
|
FT_IPv4, BASE_NONE, NULL, 0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_originator_ip6,
|
|
{ "Originator", "pim.originator",
|
|
FT_IPv6, BASE_NONE, NULL, 0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_group_address_ip4,
|
|
{ "Group Address", "pim.group_address",
|
|
FT_IPv4, BASE_NONE, NULL, 0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_bd_pass_ip4,
|
|
{ "New Winner IP", "pim.bidir_winner_ip4",
|
|
FT_IPv4, BASE_NONE, NULL, 0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_bd_pass_ip6,
|
|
{ "New Winner IP", "pim.bidir_winner_ip6",
|
|
FT_IPv6, BASE_NONE, NULL, 0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_bd_pass_metric_pref,
|
|
{ "Winner Metric Preference", "pim.bidir_win_metric_pref",
|
|
FT_UINT32, BASE_DEC, NULL, 0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_bd_pass_metric,
|
|
{ "Winner Metric", "pim.bidir_win_metric",
|
|
FT_UINT32, BASE_DEC, NULL, 0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_bd_bo_offer_ip4,
|
|
{ "Offering IP", "pim.bidir_offering_ip4",
|
|
FT_IPv4, BASE_NONE, NULL, 0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_bd_bo_offer_ip6,
|
|
{ "Offering IP", "pim.bidir_offering_ip6",
|
|
FT_IPv6, BASE_NONE, NULL, 0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_bd_offer_metric_pref,
|
|
{ "Offering Metric Preference", "pim.bidir_off_metric_pref",
|
|
FT_UINT32, BASE_DEC, NULL, 0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_bd_offer_metric,
|
|
{ "Offering Metric", "pim.bidir_off_metric",
|
|
FT_UINT32, BASE_DEC, NULL, 0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_bd_offer_interval,
|
|
{ "Offering interval (ms)", "pim.bidir_offering_interval",
|
|
FT_UINT16, BASE_DEC, NULL, 0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_fragment_tag,
|
|
{ "Fragment tag", "pim.fragment_tag",
|
|
FT_UINT16, BASE_HEX, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_hash_mask_len,
|
|
{ "Hash mask len", "pim.hash_mask_len",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_bsr_priority,
|
|
{ "BSR priority", "pim.bsr_priority",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_rp_count,
|
|
{ "RP count", "pim.rp_count",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_frp_count,
|
|
{ "FRP count", "pim.frp_count",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_priority,
|
|
{ "Priority", "pim.priority",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_prefix_count,
|
|
{ "Prefix-count", "pim.prefix_count",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_src_flags_a,
|
|
{ "Annotated", "pim.src_flags.a",
|
|
FT_UINT8, BASE_DEC, NULL, 0x08,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_src_flags_s,
|
|
{ "Sparse", "pim.src_flags.s",
|
|
FT_UINT8, BASE_DEC, NULL, 0x04,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_src_flags_w,
|
|
{ "WC", "pim.src_flags.w",
|
|
FT_UINT8, BASE_DEC, NULL, 0x02,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_src_flags_r,
|
|
{ "RP", "pim.src_flags.r",
|
|
FT_UINT8, BASE_DEC, NULL, 0x01,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_src_flags_rsv,
|
|
{ "Reserved", "pim.src_flags.rsv",
|
|
FT_UINT8, BASE_DEC, NULL, 0xF0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_mask_len,
|
|
{ "Masklen", "pim.mask_len",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_addr_len,
|
|
{ "Address Len", "pim.addr_len",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_ttl,
|
|
{ "TTL", "pim.ttl",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_pim_interval,
|
|
{ "Interval", "pim.interval",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
};
|
|
|
|
static gint *ett[] = {
|
|
&ett_pim,
|
|
&ett_pim_opts, /* Tree for all options */
|
|
&ett_pim_opt /* Tree for each option */
|
|
};
|
|
|
|
module_t *pim_module;
|
|
|
|
proto_pim = proto_register_protocol("Protocol Independent Multicast",
|
|
"PIM", "pim");
|
|
proto_register_field_array(proto_pim, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
|
|
pim_module = prefs_register_protocol(proto_pim, NULL);
|
|
prefs_register_bool_preference(pim_module, "payload_tree",
|
|
"PIM payload shown on main tree",
|
|
"Whether the PIM payload is shown off of the main tree or encapsulated within the PIM options",
|
|
&use_main_tree);
|
|
|
|
}
|
|
|
|
void
|
|
proto_reg_handoff_pim(void)
|
|
{
|
|
dissector_handle_t pim_handle, pimv1_handle;
|
|
|
|
pim_handle = create_dissector_handle(dissect_pim, proto_pim);
|
|
dissector_add_uint("ip.proto", IP_PROTO_PIM, pim_handle);
|
|
|
|
pimv1_handle = new_create_dissector_handle(dissect_pimv1, proto_pim);
|
|
dissector_add_uint("igmp.type", IGMP_V1_PIM_ROUTING_MESSAGE, pimv1_handle);
|
|
|
|
/*
|
|
* Get handles for the IPv4 and IPv6 dissectors.
|
|
*/
|
|
ip_handle = find_dissector("ip");
|
|
ipv6_handle = find_dissector("ipv6");
|
|
}
|
|
|
|
/*
|
|
* Editor modelines - http://www.wireshark.org/tools/modelines.html
|
|
*
|
|
* Local variables:
|
|
* c-basic-offset: 4
|
|
* tab-width: 8
|
|
* indent-tabs-mode: nil
|
|
* End:
|
|
*
|
|
* vi: set shiftwidth=4 tabstop=8 expandtab:
|
|
* :indentSize=4:tabSize=8:noTabs=true:
|
|
*/
|