forked from osmocom/wireshark
c544c20956
svn path=/trunk/; revision=27050
1954 lines
60 KiB
C
1954 lines
60 KiB
C
/* packet-ipv6.c
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* Routines for IPv6 packet disassembly
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*
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* $Id$
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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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* SHIM6 support added by Matthijs Mekking <matthijs@NLnetLabs.nl>
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*
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* MobileIPv6 support added by Tomislav Borosa <tomislav.borosa@siemens.hr>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <string.h>
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#include <math.h>
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#include <stdio.h>
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#include <glib.h>
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#include <epan/packet.h>
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#include "packet-ipsec.h"
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#include "packet-ipv6.h"
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#include <epan/ip_opts.h>
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#include <epan/addr_resolv.h>
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#include <epan/prefs.h>
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#include <epan/reassemble.h>
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#include <epan/ipproto.h>
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#include <epan/ipv6-utils.h>
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#include <epan/etypes.h>
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#include <epan/ppptypes.h>
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#include <epan/aftypes.h>
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#include <epan/nlpid.h>
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#include <epan/arcnet_pids.h>
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#include <epan/in_cksum.h>
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#include <epan/value_string.h>
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#include <epan/expert.h>
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#include <epan/emem.h>
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/*
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* NOTE: ipv6.nxt is not very useful as we will have chained header.
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* now testing ipv6.final, but it raises SEGV.
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#define TEST_FINALHDR
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*/
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static int proto_ipv6 = -1;
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static int hf_ipv6_version = -1;
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static int hf_ip_version = -1;
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static int hf_ipv6_class = -1;
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static int hf_ipv6_flow = -1;
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static int hf_ipv6_plen = -1;
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static int hf_ipv6_nxt = -1;
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static int hf_ipv6_hlim = -1;
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static int hf_ipv6_src = -1;
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static int hf_ipv6_src_host = -1;
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static int hf_ipv6_dst = -1;
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static int hf_ipv6_dst_host = -1;
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static int hf_ipv6_addr = -1;
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static int hf_ipv6_host = -1;
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static int hf_ipv6_opt_pad1 = -1;
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static int hf_ipv6_opt_padn = -1;
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static int hf_ipv6_dst_opt = -1;
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static int hf_ipv6_hop_opt = -1;
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static int hf_ipv6_unk_hdr = -1;
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static int hf_ipv6_routing_hdr_opt = -1;
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static int hf_ipv6_routing_hdr_type = -1;
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static int hf_ipv6_routing_hdr_left = -1;
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static int hf_ipv6_routing_hdr_addr = -1;
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#ifdef TEST_FINALHDR
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static int hf_ipv6_final = -1;
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#endif
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static int hf_ipv6_frag_offset = -1;
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static int hf_ipv6_frag_more = -1;
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static int hf_ipv6_frag_id = -1;
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static int hf_ipv6_fragments = -1;
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static int hf_ipv6_fragment = -1;
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static int hf_ipv6_fragment_overlap = -1;
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static int hf_ipv6_fragment_overlap_conflict = -1;
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static int hf_ipv6_fragment_multiple_tails = -1;
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static int hf_ipv6_fragment_too_long_fragment = -1;
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static int hf_ipv6_fragment_error = -1;
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static int hf_ipv6_reassembled_in = -1;
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static int hf_ipv6_mipv6_type = -1;
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static int hf_ipv6_mipv6_length = -1;
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static int hf_ipv6_mipv6_home_address = -1;
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static int hf_ipv6_shim6 = -1;
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static int hf_ipv6_shim6_nxt = -1;
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static int hf_ipv6_shim6_len = -1;
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static int hf_ipv6_shim6_p = -1;
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/* context tag is 49 bits, cannot be used for filter yet */
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static int hf_ipv6_shim6_ct = -1;
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static int hf_ipv6_shim6_type = -1;
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static int hf_ipv6_shim6_proto = -1;
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static int hf_ipv6_shim6_checksum = -1;
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static int hf_ipv6_shim6_checksum_bad = -1;
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static int hf_ipv6_shim6_checksum_good= -1;
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static int hf_ipv6_shim6_inonce = -1; /* also for request nonce */
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static int hf_ipv6_shim6_rnonce = -1;
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static int hf_ipv6_shim6_precvd = -1;
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static int hf_ipv6_shim6_psent = -1;
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static int hf_ipv6_shim6_psrc = -1;
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static int hf_ipv6_shim6_pdst = -1;
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static int hf_ipv6_shim6_pnonce = -1;
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static int hf_ipv6_shim6_pdata = -1;
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static int hf_ipv6_shim6_sulid = -1;
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static int hf_ipv6_shim6_rulid = -1;
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static int hf_ipv6_shim6_reap = -1;
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static int hf_ipv6_shim6_opt_type = -1;
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static int hf_ipv6_shim6_opt_len = -1;
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static int hf_ipv6_shim6_opt_total_len= -1;
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static int hf_ipv6_shim6_opt_loc_verif_methods = -1;
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static int hf_ipv6_shim6_opt_critical = -1;
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static int hf_ipv6_shim6_opt_loclist = -1;
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static int hf_ipv6_shim6_locator = -1;
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static int hf_ipv6_shim6_loc_flag = -1;
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static int hf_ipv6_shim6_loc_prio = -1;
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static int hf_ipv6_shim6_loc_weight = -1;
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static int hf_ipv6_shim6_opt_locnum = -1;
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static int hf_ipv6_shim6_opt_elemlen = -1;
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static int hf_ipv6_shim6_opt_fii = -1;
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static gint ett_ipv6 = -1;
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static gint ett_ipv6_version = -1;
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static gint ett_ipv6_shim6 = -1;
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static gint ett_ipv6_shim6_option = -1;
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static gint ett_ipv6_shim6_locators = -1;
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static gint ett_ipv6_shim6_verif_methods = -1;
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static gint ett_ipv6_shim6_loc_pref = -1;
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static gint ett_ipv6_shim6_probes_sent = -1;
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static gint ett_ipv6_shim6_probe_sent = -1;
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static gint ett_ipv6_shim6_probes_rcvd = -1;
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static gint ett_ipv6_shim6_probe_rcvd = -1;
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static gint ett_ipv6_shim6_cksum = -1;
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static gint ett_ipv6_fragments = -1;
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static gint ett_ipv6_fragment = -1;
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static const fragment_items ipv6_frag_items = {
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&ett_ipv6_fragment,
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&ett_ipv6_fragments,
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&hf_ipv6_fragments,
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&hf_ipv6_fragment,
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&hf_ipv6_fragment_overlap,
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&hf_ipv6_fragment_overlap_conflict,
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&hf_ipv6_fragment_multiple_tails,
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&hf_ipv6_fragment_too_long_fragment,
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&hf_ipv6_fragment_error,
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&hf_ipv6_reassembled_in,
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"fragments"
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};
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static dissector_handle_t data_handle;
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static dissector_table_t ip_dissector_table;
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/* Reassemble fragmented datagrams */
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static gboolean ipv6_reassemble = TRUE;
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#ifndef offsetof
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#define offsetof(type, member) ((size_t)(&((type *)0)->member))
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#endif
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/*
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* defragmentation of IPv6
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*/
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static GHashTable *ipv6_fragment_table = NULL;
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static GHashTable *ipv6_reassembled_table = NULL;
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void
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capture_ipv6(const guchar *pd, int offset, int len, packet_counts *ld)
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{
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guint8 nxt;
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int advance;
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if (!BYTES_ARE_IN_FRAME(offset, len, 4+4+16+16)) {
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ld->other++;
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return;
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}
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nxt = pd[offset+6]; /* get the "next header" value */
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offset += 4+4+16+16; /* skip past the IPv6 header */
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again:
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switch (nxt) {
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case IP_PROTO_HOPOPTS:
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case IP_PROTO_ROUTING:
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case IP_PROTO_DSTOPTS:
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if (!BYTES_ARE_IN_FRAME(offset, len, 2)) {
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ld->other++;
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return;
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}
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nxt = pd[offset];
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advance = (pd[offset+1] + 1) << 3;
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if (!BYTES_ARE_IN_FRAME(offset, len, advance)) {
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ld->other++;
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return;
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}
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offset += advance;
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goto again;
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case IP_PROTO_FRAGMENT:
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if (!BYTES_ARE_IN_FRAME(offset, len, 2)) {
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ld->other++;
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return;
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}
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nxt = pd[offset];
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advance = 8;
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if (!BYTES_ARE_IN_FRAME(offset, len, advance)) {
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ld->other++;
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return;
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}
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offset += advance;
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goto again;
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case IP_PROTO_AH:
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if (!BYTES_ARE_IN_FRAME(offset, len, 2)) {
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ld->other++;
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return;
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}
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nxt = pd[offset];
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advance = 8 + ((pd[offset+1] - 1) << 2);
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if (!BYTES_ARE_IN_FRAME(offset, len, advance)) {
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ld->other++;
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return;
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}
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offset += advance;
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goto again;
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case IP_PROTO_SHIM6:
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if (!BYTES_ARE_IN_FRAME(offset, len, 2)) {
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ld->other++;
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return;
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}
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nxt = pd[offset];
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advance = (pd[offset+1] + 1) << 3;
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if (!BYTES_ARE_IN_FRAME(offset, len, advance)) {
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ld->other++;
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return;
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}
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offset += advance;
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goto again;
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}
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switch(nxt) {
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case IP_PROTO_SCTP:
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ld->sctp++;
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break;
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case IP_PROTO_TCP:
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ld->tcp++;
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break;
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case IP_PROTO_UDP:
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case IP_PROTO_UDPLITE:
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ld->udp++;
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break;
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case IP_PROTO_ICMP:
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case IP_PROTO_ICMPV6: /* XXX - separate counters? */
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ld->icmp++;
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break;
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case IP_PROTO_OSPF:
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ld->ospf++;
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break;
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case IP_PROTO_GRE:
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ld->gre++;
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break;
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case IP_PROTO_VINES:
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ld->vines++;
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break;
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default:
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ld->other++;
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}
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}
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static void
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ipv6_reassemble_init(void)
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{
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fragment_table_init(&ipv6_fragment_table);
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reassembled_table_init(&ipv6_reassembled_table);
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}
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enum {
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IPv6_RT_HEADER_SOURCE_ROUTING=0,
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IPv6_RT_HEADER_NIMROD,
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IPv6_RT_HEADER_MobileIP
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};
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/* Routeing Header Types */
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static const value_string routing_header_type[] = {
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{ IPv6_RT_HEADER_SOURCE_ROUTING, "IPv6 Source Routing" },
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{ IPv6_RT_HEADER_NIMROD, "Nimrod" },
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{ IPv6_RT_HEADER_MobileIP, "Mobile IP" },
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{ 0, NULL }
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};
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static int
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dissect_routing6(tvbuff_t *tvb, int offset, proto_tree *tree, packet_info *pinfo) {
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struct ip6_rthdr rt;
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guint len;
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proto_tree *rthdr_tree;
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proto_item *ti;
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guint8 buf[sizeof(struct ip6_rthdr0) + sizeof(struct e_in6_addr) * 23];
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tvb_memcpy(tvb, (guint8 *)&rt, offset, sizeof(rt));
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len = (rt.ip6r_len + 1) << 3;
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if (tree) {
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/* !!! specify length */
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ti = proto_tree_add_uint_format(tree, hf_ipv6_routing_hdr_opt, tvb,
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offset, len, rt.ip6r_type,
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"Routing Header, Type : %s (%u)",
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val_to_str(rt.ip6r_type, routing_header_type, "Unknown"),
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rt.ip6r_type);
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rthdr_tree = proto_item_add_subtree(ti, ett_ipv6);
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proto_tree_add_text(rthdr_tree, tvb,
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offset + offsetof(struct ip6_rthdr, ip6r_nxt), 1,
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"Next header: %s (0x%02x)", ipprotostr(rt.ip6r_nxt), rt.ip6r_nxt);
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proto_tree_add_text(rthdr_tree, tvb,
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offset + offsetof(struct ip6_rthdr, ip6r_len), 1,
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"Length: %u (%d bytes)", rt.ip6r_len, len);
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proto_tree_add_item(rthdr_tree, hf_ipv6_routing_hdr_type, tvb,
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offset + offsetof(struct ip6_rthdr, ip6r_type), 1, FALSE);
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proto_tree_add_item(rthdr_tree, hf_ipv6_routing_hdr_left, tvb,
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offset + offsetof(struct ip6_rthdr, ip6r_segleft), 1, FALSE);
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if (rt.ip6r_type == IPv6_RT_HEADER_SOURCE_ROUTING && len <= sizeof(buf)) {
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struct e_in6_addr *a;
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int n;
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struct ip6_rthdr0 *rt0;
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tvb_memcpy(tvb, buf, offset, len);
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rt0 = (struct ip6_rthdr0 *)buf;
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for (a = rt0->ip6r0_addr, n = 0;
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a < (struct e_in6_addr *)(buf + len); a++, n++) {
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proto_tree_add_item(rthdr_tree, hf_ipv6_routing_hdr_addr, tvb,
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offset + offsetof(struct ip6_rthdr0, ip6r0_addr)
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+ n * sizeof(struct e_in6_addr),
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sizeof(struct e_in6_addr), FALSE);
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SET_ADDRESS(&pinfo->dst, AT_IPv6, 16, tvb_get_ptr(tvb,
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offset + offsetof(struct ip6_rthdr0, ip6r0_addr)
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+ n * sizeof(struct e_in6_addr), 16));
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}
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}
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if (rt.ip6r_type == IPv6_RT_HEADER_MobileIP) {
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proto_tree_add_item(rthdr_tree, hf_ipv6_mipv6_home_address, tvb,
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offset + 8, 16, FALSE);
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SET_ADDRESS(&pinfo->dst, AT_IPv6, 16, tvb_get_ptr(tvb, offset + 8, 16));
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}
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}
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return len;
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}
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static const true_false_string ipv6_more_frag = {
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"Yes",
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"No"
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};
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static int
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dissect_frag6(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree,
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guint16 *offlg, guint32 *ident) {
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struct ip6_frag frag;
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int len;
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proto_item *ti;
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proto_tree *rthdr_tree;
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tvb_memcpy(tvb, (guint8 *)&frag, offset, sizeof(frag));
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len = sizeof(frag);
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frag.ip6f_offlg = g_ntohs(frag.ip6f_offlg);
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frag.ip6f_ident = g_ntohl(frag.ip6f_ident);
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*offlg = frag.ip6f_offlg;
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*ident = frag.ip6f_ident;
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if (check_col(pinfo->cinfo, COL_INFO)) {
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col_add_fstr(pinfo->cinfo, COL_INFO,
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"IPv6 fragment (nxt=%s (0x%02x) off=%u id=0x%x)",
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ipprotostr(frag.ip6f_nxt), frag.ip6f_nxt,
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frag.ip6f_offlg & IP6F_OFF_MASK, frag.ip6f_ident);
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}
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if (tree) {
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ti = proto_tree_add_text(tree, tvb, offset, len,
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"Fragmentation Header");
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rthdr_tree = proto_item_add_subtree(ti, ett_ipv6);
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proto_tree_add_text(rthdr_tree, tvb,
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offset + offsetof(struct ip6_frag, ip6f_nxt), 1,
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"Next header: %s (0x%02x)",
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ipprotostr(frag.ip6f_nxt), frag.ip6f_nxt);
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#if 0
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proto_tree_add_text(rthdr_tree, tvb,
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offset + offsetof(struct ip6_frag, ip6f_reserved), 1,
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"Reserved: %u",
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frag.ip6f_reserved);
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#endif
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proto_tree_add_item(rthdr_tree, hf_ipv6_frag_offset, tvb,
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offset + offsetof(struct ip6_frag, ip6f_offlg), 2, FALSE);
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proto_tree_add_item(rthdr_tree, hf_ipv6_frag_more, tvb,
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offset + offsetof(struct ip6_frag, ip6f_offlg), 2, FALSE);
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proto_tree_add_item(rthdr_tree, hf_ipv6_frag_id, tvb,
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offset + offsetof(struct ip6_frag, ip6f_ident), 4, FALSE);
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}
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return len;
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}
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static int
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dissect_mipv6_hoa(tvbuff_t *tvb, proto_tree *dstopt_tree, int offset, packet_info *pinfo)
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{
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int len = 0;
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proto_tree_add_uint_format(dstopt_tree, hf_ipv6_mipv6_type, tvb,
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offset + len, 1,
|
|
tvb_get_guint8(tvb, offset + len),
|
|
"Option Type: %u (0x%02x) - Home Address Option",
|
|
tvb_get_guint8(tvb, offset + len),
|
|
tvb_get_guint8(tvb, offset + len));
|
|
len += 1;
|
|
|
|
proto_tree_add_uint(dstopt_tree, hf_ipv6_mipv6_length, tvb, offset + len,
|
|
1, tvb_get_guint8(tvb, offset + len));
|
|
len += 1;
|
|
|
|
proto_tree_add_ipv6(dstopt_tree, hf_ipv6_mipv6_home_address, tvb,
|
|
offset + len, 16, tvb_get_ptr(tvb, offset + len, 16));
|
|
SET_ADDRESS(&pinfo->src, AT_IPv6, 16, tvb_get_ptr(tvb, offset + len, 16));
|
|
len += 16;
|
|
return len;
|
|
}
|
|
|
|
static const value_string rtalertvals[] = {
|
|
{ IP6OPT_RTALERT_MLD, "MLD" },
|
|
{ IP6OPT_RTALERT_RSVP, "RSVP" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
/* Like "dissect_ip_tcp_options()", but assumes the length of an option
|
|
*doesn't* include the type and length bytes. */
|
|
void
|
|
dissect_ipv6_options(tvbuff_t *tvb, int offset, guint length,
|
|
const ip_tcp_opt *opttab, int nopts, int eol,
|
|
packet_info *pinfo, proto_tree *opt_tree)
|
|
{
|
|
guchar opt;
|
|
const ip_tcp_opt *optp;
|
|
opt_len_type len_type;
|
|
unsigned int optlen;
|
|
const char *name;
|
|
char name_str[7+1+1+2+2+1+1]; /* "Unknown (0x%02x)" */
|
|
void (*dissect)(const struct ip_tcp_opt *, tvbuff_t *,
|
|
int, guint, packet_info *, proto_tree *);
|
|
guint len;
|
|
|
|
while (length > 0) {
|
|
opt = tvb_get_guint8(tvb, offset);
|
|
for (optp = &opttab[0]; optp < &opttab[nopts]; optp++) {
|
|
if (optp->optcode == opt)
|
|
break;
|
|
}
|
|
if (optp == &opttab[nopts]) {
|
|
/* We assume that the only NO_LENGTH options are Pad1 options,
|
|
so that we can treat unknown options as VARIABLE_LENGTH with a
|
|
minimum of 0, and at least be able to move on to the next option
|
|
by using the length in the option. */
|
|
optp = NULL; /* indicate that we don't know this option */
|
|
len_type = VARIABLE_LENGTH;
|
|
optlen = 0;
|
|
g_snprintf(name_str, sizeof name_str, "Unknown (0x%02x)", opt);
|
|
name = name_str;
|
|
dissect = NULL;
|
|
} else {
|
|
len_type = optp->len_type;
|
|
optlen = optp->optlen;
|
|
name = optp->name;
|
|
dissect = optp->dissect;
|
|
}
|
|
--length; /* account for type byte */
|
|
if (len_type != NO_LENGTH) {
|
|
/* Option has a length. Is it in the packet? */
|
|
if (length == 0) {
|
|
/* Bogus - packet must at least include option code byte and
|
|
length byte! */
|
|
proto_tree_add_text(opt_tree, tvb, offset, 1,
|
|
"%s (length byte past end of options)", name);
|
|
return;
|
|
}
|
|
len = tvb_get_guint8(tvb, offset + 1); /* total including type, len */
|
|
--length; /* account for length byte */
|
|
if (len > length) {
|
|
/* Bogus - option goes past the end of the header. */
|
|
proto_tree_add_text(opt_tree, tvb, offset, length,
|
|
"%s (option length = %u byte%s says option goes past end of options)",
|
|
name, len, plurality(len, "", "s"));
|
|
return;
|
|
} else if (len_type == FIXED_LENGTH && len != optlen) {
|
|
/* Bogus - option length isn't what it's supposed to be for this
|
|
option. */
|
|
proto_tree_add_text(opt_tree, tvb, offset, 2 + len,
|
|
"%s (with option length = %u byte%s; should be %u)", name,
|
|
len, plurality(len, "", "s"), optlen);
|
|
return;
|
|
} else if (len_type == VARIABLE_LENGTH && len < optlen) {
|
|
/* Bogus - option length is less than what it's supposed to be for
|
|
this option. */
|
|
proto_tree_add_text(opt_tree, tvb, offset, 2 + len,
|
|
"%s (with option length = %u byte%s; should be >= %u)", name,
|
|
len, plurality(len, "", "s"), optlen);
|
|
return;
|
|
} else {
|
|
if (optp == NULL) {
|
|
proto_tree_add_text(opt_tree, tvb, offset, 2 + len, "%s (%u byte%s)",
|
|
name, len, plurality(len, "", "s"));
|
|
} else {
|
|
if (dissect != NULL) {
|
|
/* Option has a dissector. */
|
|
(*dissect)(optp, tvb, offset, 2 + len, pinfo, opt_tree);
|
|
} else {
|
|
/* Option has no data, hence no dissector. */
|
|
proto_tree_add_text(opt_tree, tvb, offset, 2 + len, "%s", name);
|
|
}
|
|
}
|
|
offset += 2 + len;
|
|
}
|
|
length -= len;
|
|
} else {
|
|
proto_tree_add_text(opt_tree, tvb, offset, 1, "%s", name);
|
|
offset += 1;
|
|
}
|
|
if (opt == eol)
|
|
break;
|
|
}
|
|
}
|
|
|
|
static int
|
|
dissect_unknown_option(tvbuff_t *tvb, int offset, proto_tree *tree)
|
|
{
|
|
struct ip6_ext ext;
|
|
int len;
|
|
proto_tree *unkopt_tree;
|
|
proto_item *ti;
|
|
|
|
tvb_memcpy(tvb, (guint8 *)&ext, offset, sizeof(ext));
|
|
len = (ext.ip6e_len + 1) << 3;
|
|
|
|
if (tree) {
|
|
/* !!! specify length */
|
|
ti = proto_tree_add_item(tree, hf_ipv6_unk_hdr, tvb, offset, len, FALSE);
|
|
|
|
unkopt_tree = proto_item_add_subtree(ti, ett_ipv6);
|
|
|
|
proto_tree_add_text(unkopt_tree, tvb,
|
|
offset + offsetof(struct ip6_ext, ip6e_nxt), 1,
|
|
"Next header: %s (0x%02x)", ipprotostr(ext.ip6e_nxt), ext.ip6e_nxt);
|
|
|
|
proto_tree_add_text(unkopt_tree, tvb,
|
|
offset + offsetof(struct ip6_ext, ip6e_len), 1,
|
|
"Length: %u (%d bytes)", ext.ip6e_len, len);
|
|
}
|
|
return len;
|
|
}
|
|
|
|
static int
|
|
dissect_opts(tvbuff_t *tvb, int offset, proto_tree *tree, packet_info * pinfo, const int hf_option_item)
|
|
{
|
|
struct ip6_ext ext;
|
|
int len;
|
|
proto_tree *dstopt_tree;
|
|
proto_item *ti;
|
|
gint p;
|
|
guint8 tmp;
|
|
int mip_offset = 0, delta = 0;
|
|
|
|
tvb_memcpy(tvb, (guint8 *)&ext, offset, sizeof(ext));
|
|
len = (ext.ip6e_len + 1) << 3;
|
|
|
|
if (tree) {
|
|
/* !!! specify length */
|
|
ti = proto_tree_add_item(tree, hf_option_item, tvb, offset, len, FALSE);
|
|
|
|
dstopt_tree = proto_item_add_subtree(ti, ett_ipv6);
|
|
|
|
proto_tree_add_text(dstopt_tree, tvb,
|
|
offset + offsetof(struct ip6_ext, ip6e_nxt), 1,
|
|
"Next header: %s (0x%02x)", ipprotostr(ext.ip6e_nxt), ext.ip6e_nxt);
|
|
|
|
proto_tree_add_text(dstopt_tree, tvb,
|
|
offset + offsetof(struct ip6_ext, ip6e_len), 1,
|
|
"Length: %u (%d bytes)", ext.ip6e_len, len);
|
|
|
|
mip_offset = offset;
|
|
mip_offset += 2;
|
|
|
|
p = offset + 2;
|
|
|
|
while (p < offset + len) {
|
|
switch (tvb_get_guint8(tvb, p)) {
|
|
case IP6OPT_PAD1:
|
|
proto_tree_add_item(dstopt_tree, hf_ipv6_opt_pad1, tvb, p, 1, FALSE);
|
|
p++;
|
|
mip_offset++;
|
|
break;
|
|
case IP6OPT_PADN:
|
|
/* RFC 2460 states :
|
|
* "The PadN option is used to insert two or more octets of
|
|
* padding into the Options area of a header. For N octets of
|
|
* padding, the Opt Data Len field contains the value N-2, and
|
|
* the Option Data consists of N-2 zero-valued octets."
|
|
*/
|
|
tmp = tvb_get_guint8(tvb, p + 1);
|
|
proto_tree_add_uint_format(dstopt_tree, hf_ipv6_opt_padn, tvb,
|
|
p, tmp + 2, tmp + 2,
|
|
"PadN: %u bytes", tmp + 2);
|
|
p += tmp + 2;
|
|
mip_offset += tvb_get_guint8(tvb, mip_offset + 1) + 2;
|
|
break;
|
|
case IP6OPT_JUMBO:
|
|
tmp = tvb_get_guint8(tvb, p + 1);
|
|
if (tmp == 4) {
|
|
proto_tree_add_text(dstopt_tree, tvb, p, tmp + 2,
|
|
"Jumbo payload: %u (%u bytes)",
|
|
tvb_get_ntohl(tvb, p + 2), tmp + 2);
|
|
} else {
|
|
ti = proto_tree_add_text(dstopt_tree, tvb, p, tmp + 2,
|
|
"Jumbo payload: Invalid length (%u bytes)", tmp);
|
|
expert_add_info_format(pinfo, ti, PI_MALFORMED, PI_ERROR,
|
|
"Jumbo payload: Invalid length (%u bytes)", tmp);
|
|
}
|
|
p += tmp + 2;
|
|
mip_offset += tvb_get_guint8(tvb, mip_offset+1)+2;
|
|
break;
|
|
case IP6OPT_RTALERT:
|
|
{
|
|
tmp = tvb_get_guint8(tvb, p + 1);
|
|
if (tmp == 2) {
|
|
proto_tree_add_text(dstopt_tree, tvb, p , tmp + 2,
|
|
"Router alert: %s (%u bytes)",
|
|
val_to_str(tvb_get_ntohs(tvb, p + 2),
|
|
rtalertvals, "Unknown"),
|
|
tmp + 2);
|
|
} else {
|
|
ti = proto_tree_add_text(dstopt_tree, tvb, p , tmp + 2,
|
|
"Router alert: Invalid Length (%u bytes)",
|
|
tmp + 2);
|
|
expert_add_info_format(pinfo, ti, PI_MALFORMED, PI_ERROR,
|
|
"Router alert: Invalid Length (%u bytes)",
|
|
tmp + 2);
|
|
}
|
|
|
|
p += tmp + 2;
|
|
mip_offset += tvb_get_guint8(tvb, mip_offset + 1) + 2;
|
|
break;
|
|
}
|
|
case IP6OPT_HOME_ADDRESS:
|
|
delta = dissect_mipv6_hoa(tvb, dstopt_tree, mip_offset, pinfo);
|
|
p += delta;
|
|
mip_offset += delta;
|
|
break;
|
|
default:
|
|
p = offset + len;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* decode... */
|
|
}
|
|
return len;
|
|
}
|
|
|
|
static int
|
|
dissect_hopopts(tvbuff_t *tvb, int offset, proto_tree *tree, packet_info * pinfo)
|
|
{
|
|
return dissect_opts(tvb, offset, tree, pinfo, hf_ipv6_hop_opt);
|
|
}
|
|
|
|
static int
|
|
dissect_dstopts(tvbuff_t *tvb, int offset, proto_tree *tree, packet_info * pinfo)
|
|
{
|
|
return dissect_opts(tvb, offset, tree, pinfo, hf_ipv6_dst_opt);
|
|
}
|
|
|
|
/* START SHIM6 PART */
|
|
static guint16 shim_checksum(const guint8 *ptr, int len)
|
|
{
|
|
vec_t cksum_vec[1];
|
|
|
|
cksum_vec[0].ptr = ptr;
|
|
cksum_vec[0].len = len;
|
|
return in_cksum(&cksum_vec[0], 1);
|
|
}
|
|
|
|
static int
|
|
dissect_shim_hex(tvbuff_t *tvb, int offset, int len, const char *itemname, guint8 bitmask, proto_tree *tree)
|
|
{
|
|
proto_item *ti;
|
|
int count;
|
|
gint p;
|
|
|
|
p = offset;
|
|
|
|
ti = proto_tree_add_text(tree, tvb, offset, len, "%s", itemname);
|
|
|
|
proto_item_append_text(ti, " 0x%02x", tvb_get_guint8(tvb, p) & bitmask);
|
|
for (count=1; count<len; count++)
|
|
proto_item_append_text(ti, "%02x", tvb_get_guint8(tvb, p+count));
|
|
|
|
return len;
|
|
}
|
|
|
|
static const value_string shimoptvals[] = {
|
|
{ SHIM6_OPT_RESPVAL, "Responder Validator Option" },
|
|
{ SHIM6_OPT_LOCLIST, "Locator List Option" },
|
|
{ SHIM6_OPT_LOCPREF, "Locator Preferences Option" },
|
|
{ SHIM6_OPT_CGAPDM, "CGA Parameter Data Structure Option" },
|
|
{ SHIM6_OPT_CGASIG, "CGA Signature Option" },
|
|
{ SHIM6_OPT_ULIDPAIR, "ULID Pair Option" },
|
|
{ SHIM6_OPT_FII, "Forked Instance Identifier Option" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const value_string shimverifmethods[] = {
|
|
{ SHIM6_VERIF_HBA, "HBA" },
|
|
{ SHIM6_VERIF_CGA, "CGA" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const value_string shimflags[] _U_ = {
|
|
{ SHIM6_FLAG_BROKEN, "BROKEN" },
|
|
{ SHIM6_FLAG_TEMPORARY, "TEMPORARY" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const value_string shimreapstates[] = {
|
|
{ SHIM6_REAP_OPERATIONAL, "Operational" },
|
|
{ SHIM6_REAP_EXPLORING, "Exploring" },
|
|
{ SHIM6_REAP_INBOUNDOK, "InboundOK" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const true_false_string shim6_critical_opts = {
|
|
"Yes",
|
|
"No"
|
|
};
|
|
|
|
static const value_string shim6_protocol[] = {
|
|
{ 0, "SHIM6" },
|
|
{ 1, "HIP" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static void
|
|
dissect_shim6_opt_loclist(proto_tree * opt_tree, tvbuff_t * tvb, gint *offset)
|
|
{
|
|
proto_item * it;
|
|
proto_tree * subtree;
|
|
guint count;
|
|
guint optlen;
|
|
int p = *offset;
|
|
|
|
proto_tree_add_item(opt_tree, hf_ipv6_shim6_opt_loclist, tvb, p, 4, FALSE);
|
|
p += 4;
|
|
|
|
optlen = tvb_get_guint8(tvb, p);
|
|
proto_tree_add_item(opt_tree, hf_ipv6_shim6_opt_locnum, tvb, p, 1, FALSE);
|
|
p++;
|
|
|
|
/* Verification Methods */
|
|
it = proto_tree_add_text(opt_tree, tvb, p, optlen,
|
|
"Locator Verification Methods");
|
|
subtree = proto_item_add_subtree(it, ett_ipv6_shim6_verif_methods);
|
|
|
|
for (count=0; count < optlen; count++)
|
|
proto_tree_add_item(subtree, hf_ipv6_shim6_opt_loc_verif_methods, tvb,
|
|
p+count, 1, FALSE);
|
|
p += optlen;
|
|
|
|
/* Padding, included in length field */
|
|
if ((7 - optlen % 8) > 0) {
|
|
proto_tree_add_text(opt_tree, tvb, p, (7 - optlen % 8), "Padding");
|
|
p += (7 - optlen % 8);
|
|
}
|
|
|
|
/* Locators */
|
|
it = proto_tree_add_text(opt_tree, tvb, p, 16 * optlen, "Locators");
|
|
subtree = proto_item_add_subtree(it, ett_ipv6_shim6_locators);
|
|
|
|
for (count=0; count < optlen; count++) {
|
|
proto_tree_add_item(subtree, hf_ipv6_shim6_locator, tvb, p, 16, FALSE);
|
|
p += 16;
|
|
}
|
|
*offset = p;
|
|
}
|
|
|
|
static void
|
|
dissect_shim6_opt_loc_pref(proto_tree * opt_tree, tvbuff_t * tvb, gint *offset, gint len, packet_info *pinfo)
|
|
{
|
|
proto_tree * subtree;
|
|
proto_item * it;
|
|
|
|
gint p;
|
|
gint optlen;
|
|
gint count;
|
|
|
|
p = *offset;
|
|
|
|
proto_tree_add_item(opt_tree, hf_ipv6_shim6_opt_loclist, tvb, p, 4, FALSE);
|
|
p += 4;
|
|
|
|
optlen = tvb_get_guint8(tvb, p);
|
|
proto_tree_add_item(opt_tree, hf_ipv6_shim6_opt_elemlen, tvb, p, 1, FALSE);
|
|
|
|
if (optlen < 1 || optlen > 3) {
|
|
it = proto_tree_add_text(opt_tree, tvb, p, 1,
|
|
"Invalid element length: %u", optlen);
|
|
expert_add_info_format(pinfo, it, PI_MALFORMED, PI_ERROR,
|
|
"Invalid element length: %u", optlen);
|
|
return;
|
|
}
|
|
|
|
p++;
|
|
|
|
/* Locator Preferences */
|
|
count = 1;
|
|
while (p < len) {
|
|
it = proto_tree_add_text(opt_tree, tvb, p, optlen, "Locator Preferences %u", count);
|
|
subtree = proto_item_add_subtree(it, ett_ipv6_shim6_loc_pref);
|
|
|
|
/* Flags */
|
|
if (optlen >= 1)
|
|
proto_tree_add_item(subtree, hf_ipv6_shim6_loc_flag, tvb, p, 1, FALSE);
|
|
/* Priority */
|
|
if (optlen >= 2)
|
|
proto_tree_add_item(subtree, hf_ipv6_shim6_loc_prio, tvb, p+1, 1, FALSE);
|
|
/* Weight */
|
|
if (optlen >= 3)
|
|
proto_tree_add_item(subtree, hf_ipv6_shim6_loc_weight, tvb, p+2, 1, FALSE);
|
|
/*
|
|
* Shim6 Draft 08 doesn't specify the format when the Element length is
|
|
* more than three, except that any such formats MUST be defined so that
|
|
* the first three octets are the same as in the above case, that is, a
|
|
* of a 1 octet flags field followed by a 1 octet priority field, and a
|
|
* 1 octet weight field.
|
|
*/
|
|
p += optlen;
|
|
count++;
|
|
}
|
|
*offset = p;
|
|
}
|
|
|
|
|
|
static int
|
|
dissect_shimopts(tvbuff_t *tvb, int offset, proto_tree *tree, packet_info *pinfo)
|
|
{
|
|
int len, total_len;
|
|
gint p;
|
|
gint padding;
|
|
proto_tree *opt_tree;
|
|
proto_item *ti;
|
|
guint8 tmp[2];
|
|
const gchar *ctype;
|
|
|
|
|
|
p = offset;
|
|
|
|
tmp[0] = tvb_get_guint8(tvb, p++);
|
|
tmp[1] = tvb_get_guint8(tvb, p++);
|
|
p += 2;
|
|
|
|
len = tvb_get_ntohs(tvb, offset+2);
|
|
padding = 7 - ((len + 3) % 8);
|
|
total_len = 4 + len + padding;
|
|
|
|
if (tree)
|
|
{
|
|
/* Option Type */
|
|
ctype = val_to_str( (tvb_get_ntohs(tvb, offset) & SHIM6_BITMASK_OPT_TYPE) >> 1, shimoptvals, "Unknown Option Type");
|
|
ti = proto_tree_add_text(tree, tvb, offset, total_len, "%s", ctype);
|
|
opt_tree = proto_item_add_subtree(ti, ett_ipv6_shim6_option);
|
|
|
|
proto_tree_add_item(opt_tree, hf_ipv6_shim6_opt_type, tvb, offset, 2, FALSE);
|
|
|
|
/* Critical */
|
|
proto_tree_add_item(opt_tree, hf_ipv6_shim6_opt_critical, tvb, offset+1, 1, FALSE);
|
|
|
|
/* Content Length */
|
|
proto_tree_add_item(opt_tree, hf_ipv6_shim6_opt_len, tvb, offset + 2, 2, FALSE);
|
|
ti = proto_tree_add_uint_format(opt_tree, hf_ipv6_shim6_opt_total_len, tvb, offset+2, 2,
|
|
total_len, "Total Length: %u", total_len);
|
|
PROTO_ITEM_SET_GENERATED(ti);
|
|
|
|
/* Option Type Specific */
|
|
switch (tvb_get_ntohs(tvb, offset) >> 1)
|
|
{
|
|
case SHIM6_OPT_RESPVAL:
|
|
p += dissect_shim_hex(tvb, p, len, "Validator:", 0xff, opt_tree);
|
|
if (total_len-(len+4) > 0)
|
|
proto_tree_add_text(opt_tree, tvb, p, total_len-(len+4), "Padding");
|
|
break;
|
|
case SHIM6_OPT_LOCLIST:
|
|
dissect_shim6_opt_loclist(opt_tree, tvb, &p);
|
|
break;
|
|
case SHIM6_OPT_LOCPREF:
|
|
dissect_shim6_opt_loc_pref(opt_tree, tvb, &p, offset+len+4, pinfo);
|
|
if (total_len-(len+4) > 0)
|
|
proto_tree_add_text(opt_tree, tvb, p, total_len-(len+4), "Padding");
|
|
break;
|
|
case SHIM6_OPT_CGAPDM:
|
|
p += dissect_shim_hex(tvb, p, len, "CGA Parameter Data Structure:", 0xff, opt_tree);
|
|
if (total_len-(len+4) > 0)
|
|
proto_tree_add_text(opt_tree, tvb, p, total_len-(len+4), "Padding");
|
|
break;
|
|
case SHIM6_OPT_CGASIG:
|
|
p += dissect_shim_hex(tvb, p, len, "CGA Signature:", 0xff, opt_tree);
|
|
if (total_len-(len+4) > 0)
|
|
proto_tree_add_text(opt_tree, tvb, p, total_len-(len+4), "Padding");
|
|
break;
|
|
case SHIM6_OPT_ULIDPAIR:
|
|
proto_tree_add_text(opt_tree, tvb, p, 4, "Reserved");
|
|
p += 4;
|
|
proto_tree_add_item(opt_tree, hf_ipv6_shim6_sulid, tvb, p, 16, FALSE);
|
|
p += 16;
|
|
proto_tree_add_item(opt_tree, hf_ipv6_shim6_rulid, tvb, p, 16, FALSE);
|
|
p += 16;
|
|
break;
|
|
case SHIM6_OPT_FII:
|
|
proto_tree_add_item(opt_tree, hf_ipv6_shim6_opt_fii, tvb, p, 4, FALSE);
|
|
p += 4;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
return total_len;
|
|
}
|
|
|
|
static void
|
|
dissect_shim6_ct(proto_tree * shim_tree, gint hf_item, tvbuff_t * tvb, gint offset, const guchar * label)
|
|
{
|
|
guint8 tmp[6];
|
|
guchar * ct_str;
|
|
|
|
tmp[0] = tvb_get_guint8(tvb, offset++);
|
|
tmp[1] = tvb_get_guint8(tvb, offset++);
|
|
tmp[2] = tvb_get_guint8(tvb, offset++);
|
|
tmp[3] = tvb_get_guint8(tvb, offset++);
|
|
tmp[4] = tvb_get_guint8(tvb, offset++);
|
|
tmp[5] = tvb_get_guint8(tvb, offset++);
|
|
|
|
ct_str = ep_strdup_printf("%s: %02X %02X %02X %02X %02X %02X", label,
|
|
tmp[0] & SHIM6_BITMASK_CT, tmp[1], tmp[2],
|
|
tmp[3], tmp[4], tmp[5]
|
|
);
|
|
proto_tree_add_none_format(shim_tree, hf_item, tvb, offset - 6, 6, "%s", ct_str);
|
|
}
|
|
|
|
static void
|
|
dissect_shim6_probes(proto_tree * shim_tree, tvbuff_t * tvb, gint offset,
|
|
const guchar * label, guint nbr_probe,
|
|
gboolean probes_rcvd)
|
|
{
|
|
proto_tree * probes_tree;
|
|
proto_tree * probe_tree;
|
|
proto_item * it;
|
|
gint ett_probes;
|
|
gint ett_probe;
|
|
guint count;
|
|
|
|
if (probes_rcvd) {
|
|
ett_probes = ett_ipv6_shim6_probes_rcvd;
|
|
ett_probe = ett_ipv6_shim6_probe_rcvd;
|
|
} else {
|
|
ett_probes = ett_ipv6_shim6_probes_sent;
|
|
ett_probe = ett_ipv6_shim6_probe_sent;
|
|
}
|
|
it = proto_tree_add_text(shim_tree, tvb, offset, 40 * nbr_probe, "%s", label);
|
|
probes_tree = proto_item_add_subtree(it, ett_probes);
|
|
|
|
for (count=0; count < nbr_probe; count++) {
|
|
it = proto_tree_add_text(probes_tree, tvb, offset, 40, "Probe %u", count+1);
|
|
probe_tree = proto_item_add_subtree(it, ett_probe);
|
|
|
|
proto_tree_add_item(probe_tree, hf_ipv6_shim6_psrc, tvb, offset, 16, FALSE);
|
|
offset += 16;
|
|
proto_tree_add_item(probe_tree, hf_ipv6_shim6_pdst, tvb, offset, 16, FALSE);
|
|
offset += 16;
|
|
|
|
proto_tree_add_item(probe_tree, hf_ipv6_shim6_pnonce, tvb, offset, 4, FALSE);
|
|
offset += 4;
|
|
|
|
proto_tree_add_item(probe_tree, hf_ipv6_shim6_pdata, tvb, offset, 4, FALSE);
|
|
offset += 4;
|
|
}
|
|
}
|
|
|
|
/* Dissect SHIM6 data: control messages */
|
|
static int
|
|
dissect_shimctrl(tvbuff_t *tvb, gint offset, guint type, proto_tree *shim_tree)
|
|
{
|
|
gint p;
|
|
guint8 tmp;
|
|
const gchar *sta;
|
|
guint probes_sent;
|
|
guint probes_rcvd;
|
|
|
|
p = offset;
|
|
|
|
switch (type)
|
|
{
|
|
case SHIM6_TYPE_I1:
|
|
dissect_shim6_ct(shim_tree, hf_ipv6_shim6_ct, tvb, p, "Initiator Context Tag");
|
|
p += 6;
|
|
proto_tree_add_item(shim_tree, hf_ipv6_shim6_inonce, tvb, p, 4, FALSE);
|
|
p += 4;
|
|
break;
|
|
case SHIM6_TYPE_R1:
|
|
proto_tree_add_text(shim_tree, tvb, p, 2, "Reserved2");
|
|
p += 2;
|
|
proto_tree_add_item(shim_tree, hf_ipv6_shim6_inonce, tvb, p, 4, FALSE);
|
|
p += 4;
|
|
proto_tree_add_item(shim_tree, hf_ipv6_shim6_rnonce, tvb, p, 4, FALSE);
|
|
p += 4;
|
|
break;
|
|
case SHIM6_TYPE_I2:
|
|
dissect_shim6_ct(shim_tree, hf_ipv6_shim6_ct, tvb, p, "Initiator Context Tag");
|
|
p += 6;
|
|
proto_tree_add_item(shim_tree, hf_ipv6_shim6_inonce, tvb, p, 4, FALSE);
|
|
p += 4;
|
|
proto_tree_add_item(shim_tree, hf_ipv6_shim6_rnonce, tvb, p, 4, FALSE);
|
|
p += 4;
|
|
proto_tree_add_text(shim_tree, tvb, p, 4, "Reserved2");
|
|
p += 4;
|
|
break;
|
|
case SHIM6_TYPE_R2:
|
|
dissect_shim6_ct(shim_tree, hf_ipv6_shim6_ct, tvb, p, "Responder Context Tag");
|
|
p += 6;
|
|
proto_tree_add_item(shim_tree, hf_ipv6_shim6_inonce, tvb, p, 4, FALSE);
|
|
p += 4;
|
|
break;
|
|
case SHIM6_TYPE_R1BIS:
|
|
dissect_shim6_ct(shim_tree, hf_ipv6_shim6_ct, tvb, p, "Packet Context Tag");
|
|
p += 6;
|
|
proto_tree_add_item(shim_tree, hf_ipv6_shim6_rnonce, tvb, p, 4, FALSE);
|
|
p += 4;
|
|
break;
|
|
case SHIM6_TYPE_I2BIS:
|
|
dissect_shim6_ct(shim_tree, hf_ipv6_shim6_ct, tvb, p, "Initiator Context Tag");
|
|
p += 6;
|
|
proto_tree_add_item(shim_tree, hf_ipv6_shim6_inonce, tvb, p, 4, FALSE);
|
|
p += 4;
|
|
proto_tree_add_item(shim_tree, hf_ipv6_shim6_rnonce, tvb, p, 4, FALSE);
|
|
p += 4;
|
|
proto_tree_add_text(shim_tree, tvb, p, 6, "Reserved2");
|
|
p += 6;
|
|
dissect_shim6_ct(shim_tree, hf_ipv6_shim6_ct, tvb, p, "Initiator Context Tag");
|
|
p += 6;
|
|
break;
|
|
case SHIM6_TYPE_UPD_REQ:
|
|
case SHIM6_TYPE_UPD_ACK:
|
|
dissect_shim6_ct(shim_tree, hf_ipv6_shim6_ct, tvb, p, "Receiver Context Tag");
|
|
p += 6;
|
|
proto_tree_add_item(shim_tree, hf_ipv6_shim6_rnonce, tvb, p, 4, FALSE);
|
|
p += 4;
|
|
break;
|
|
case SHIM6_TYPE_KEEPALIVE:
|
|
dissect_shim6_ct(shim_tree, hf_ipv6_shim6_ct, tvb, p, "Receiver Context Tag");
|
|
p += 6;
|
|
proto_tree_add_text(shim_tree, tvb, p, 4, "Reserved2");
|
|
p += 4;
|
|
break;
|
|
case SHIM6_TYPE_PROBE:
|
|
dissect_shim6_ct(shim_tree, hf_ipv6_shim6_ct, tvb, p, "Receiver Context Tag");
|
|
p += 6;
|
|
|
|
tmp = tvb_get_guint8(tvb, p);
|
|
probes_sent = tmp & SHIM6_BITMASK_PSENT;
|
|
probes_rcvd = (tmp & SHIM6_BITMASK_PRECVD) >> 4;
|
|
|
|
proto_tree_add_uint_format(shim_tree, hf_ipv6_shim6_psent, tvb,
|
|
p, 1, probes_sent,
|
|
"Probes Sent: %u", probes_sent);
|
|
proto_tree_add_uint_format(shim_tree, hf_ipv6_shim6_precvd, tvb,
|
|
p, 1, probes_rcvd,
|
|
"Probes Received: %u", probes_rcvd);
|
|
p++;
|
|
|
|
sta = val_to_str((tvb_get_guint8(tvb, p) & SHIM6_BITMASK_STA) >> 6,
|
|
shimreapstates, "Unknown REAP State");
|
|
proto_tree_add_uint_format(shim_tree, hf_ipv6_shim6_reap, tvb,
|
|
p, 1, (tvb_get_guint8(tvb, p) & SHIM6_BITMASK_STA) >> 6,
|
|
"REAP State: %s", sta);
|
|
|
|
proto_tree_add_text(shim_tree, tvb, p, 3, "Reserved2");
|
|
p += 3;
|
|
|
|
/* Probes Sent */
|
|
if (probes_sent) {
|
|
dissect_shim6_probes(shim_tree, tvb, p, "Probes Sent",
|
|
probes_sent, FALSE);
|
|
p += 40 * probes_sent;
|
|
}
|
|
|
|
/* Probes Received */
|
|
if (probes_rcvd) {
|
|
dissect_shim6_probes(shim_tree, tvb, p, "Probes Received",
|
|
probes_rcvd, TRUE);
|
|
p += 40 * probes_rcvd;
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
return p-offset;
|
|
}
|
|
|
|
/* Dissect SHIM6 data: payload, common part, options */
|
|
static const value_string shimctrlvals[] = {
|
|
{ SHIM6_TYPE_I1, "I1" },
|
|
{ SHIM6_TYPE_R1, "R1" },
|
|
{ SHIM6_TYPE_I2, "I2" },
|
|
{ SHIM6_TYPE_R2, "R2" },
|
|
{ SHIM6_TYPE_R1BIS, "R1bis" },
|
|
{ SHIM6_TYPE_I2BIS, "I2bis" },
|
|
{ SHIM6_TYPE_UPD_REQ, "Update Request" },
|
|
{ SHIM6_TYPE_UPD_ACK, "Update Acknowledgement" },
|
|
{ SHIM6_TYPE_KEEPALIVE, "Keepalive" },
|
|
{ SHIM6_TYPE_PROBE, "Probe" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static void ipv6_shim6_checkum_additional_info(tvbuff_t * tvb, packet_info * pinfo,
|
|
proto_item * it_cksum, int offset, gboolean is_cksum_correct)
|
|
{
|
|
proto_tree * checksum_tree;
|
|
proto_item * item;
|
|
|
|
checksum_tree = proto_item_add_subtree(it_cksum, ett_ipv6_shim6_cksum);
|
|
item = proto_tree_add_boolean(checksum_tree, hf_ipv6_shim6_checksum_good, tvb,
|
|
offset, 2, is_cksum_correct);
|
|
PROTO_ITEM_SET_GENERATED(item);
|
|
item = proto_tree_add_boolean(checksum_tree, hf_ipv6_shim6_checksum_bad, tvb,
|
|
offset, 2, !is_cksum_correct);
|
|
PROTO_ITEM_SET_GENERATED(item);
|
|
if (!is_cksum_correct) {
|
|
expert_add_info_format(pinfo, item, PI_CHECKSUM, PI_ERROR, "Bad checksum");
|
|
if (check_col(pinfo->cinfo, COL_INFO))
|
|
col_append_str(pinfo->cinfo, COL_INFO, " [Shim6 CHECKSUM INCORRECT]");
|
|
}
|
|
}
|
|
|
|
static int
|
|
dissect_shim6(tvbuff_t *tvb, int offset, proto_tree *tree, packet_info * pinfo)
|
|
{
|
|
struct ip6_shim shim;
|
|
int len;
|
|
gint p;
|
|
proto_tree *shim_tree;
|
|
proto_item *ti;
|
|
guint8 tmp[5];
|
|
|
|
tvb_memcpy(tvb, (guint8 *)&shim, offset, sizeof(shim));
|
|
len = (shim.ip6s_len + 1) << 3;
|
|
|
|
if (tree)
|
|
{
|
|
ti = proto_tree_add_item(tree, hf_ipv6_shim6, tvb, offset, len, FALSE);
|
|
shim_tree = proto_item_add_subtree(ti, ett_ipv6_shim6);
|
|
|
|
/* Next Header */
|
|
proto_tree_add_uint_format(shim_tree, hf_ipv6_shim6_nxt, tvb,
|
|
offset + offsetof(struct ip6_shim, ip6s_nxt), 1, shim.ip6s_nxt,
|
|
"Next header: %s (0x%02x)", ipprotostr(shim.ip6s_nxt), shim.ip6s_nxt);
|
|
|
|
/* Header Extension Length */
|
|
proto_tree_add_uint_format(shim_tree, hf_ipv6_shim6_len, tvb,
|
|
offset + offsetof(struct ip6_shim, ip6s_len), 1, shim.ip6s_len,
|
|
"Header Ext Length: %u (%d bytes)", shim.ip6s_len, len);
|
|
|
|
/* P Field */
|
|
proto_tree_add_item(shim_tree, hf_ipv6_shim6_p, tvb,
|
|
offset + offsetof(struct ip6_shim, ip6s_p), 1, FALSE);
|
|
|
|
/* skip the first 2 bytes (nxt hdr, hdr ext len, p+7bits) */
|
|
p = offset + 3;
|
|
|
|
if (shim.ip6s_p & SHIM6_BITMASK_P)
|
|
{
|
|
tmp[0] = tvb_get_guint8(tvb, p++);
|
|
tmp[1] = tvb_get_guint8(tvb, p++);
|
|
tmp[2] = tvb_get_guint8(tvb, p++);
|
|
tmp[3] = tvb_get_guint8(tvb, p++);
|
|
tmp[4] = tvb_get_guint8(tvb, p++);
|
|
|
|
/* Payload Extension Header */
|
|
proto_tree_add_none_format(shim_tree, hf_ipv6_shim6_ct, tvb,
|
|
offset + offsetof(struct ip6_shim, ip6s_p), 6,
|
|
"Receiver Context Tag: %02x %02x %02x %02x %02x %02x",
|
|
shim.ip6s_p & SHIM6_BITMASK_CT, tmp[0], tmp[1], tmp[2], tmp[3], tmp[4]);
|
|
}
|
|
else
|
|
{
|
|
/* Control Message */
|
|
guint16 csum;
|
|
int advance;
|
|
|
|
/* Message Type */
|
|
proto_tree_add_item(shim_tree, hf_ipv6_shim6_type, tvb,
|
|
offset + offsetof(struct ip6_shim, ip6s_p), 1,
|
|
FALSE
|
|
);
|
|
|
|
/* Protocol bit (Must be zero for SHIM6) */
|
|
proto_tree_add_item(shim_tree, hf_ipv6_shim6_proto, tvb, p, 1, FALSE);
|
|
p++;
|
|
|
|
/* Checksum */
|
|
csum = shim_checksum(tvb_get_ptr(tvb, offset, len), len);
|
|
|
|
if (csum == 0) {
|
|
ti = proto_tree_add_uint_format(shim_tree, hf_ipv6_shim6_checksum, tvb, p, 2,
|
|
tvb_get_ntohs(tvb, p), "Checksum: 0x%04x [correct]", tvb_get_ntohs(tvb, p));
|
|
ipv6_shim6_checkum_additional_info(tvb, pinfo, ti, p, TRUE);
|
|
} else {
|
|
ti = proto_tree_add_uint_format(shim_tree, hf_ipv6_shim6_checksum, tvb, p, 2,
|
|
tvb_get_ntohs(tvb, p), "Checksum: 0x%04x [incorrect: should be 0x%04x]",
|
|
tvb_get_ntohs(tvb, p), in_cksum_shouldbe(tvb_get_ntohs(tvb, p), csum));
|
|
ipv6_shim6_checkum_additional_info(tvb, pinfo, ti, p, FALSE);
|
|
}
|
|
p += 2;
|
|
|
|
/* Type specific data */
|
|
advance = dissect_shimctrl(tvb, p, shim.ip6s_p & SHIM6_BITMASK_TYPE, shim_tree);
|
|
p += advance;
|
|
|
|
/* Options */
|
|
while (p < offset+len) {
|
|
p += dissect_shimopts(tvb, p, shim_tree, pinfo);
|
|
}
|
|
}
|
|
}
|
|
return len;
|
|
}
|
|
|
|
/* END SHIM6 PART */
|
|
|
|
static void
|
|
dissect_ipv6(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
|
|
{
|
|
proto_tree *ipv6_tree = NULL;
|
|
proto_item *ti;
|
|
guint8 nxt;
|
|
guint8 stype=0;
|
|
int advance;
|
|
int poffset;
|
|
guint16 plen;
|
|
gboolean hopopts, routing, frag, ah, shim6, dstopts;
|
|
guint16 offlg;
|
|
guint32 ident;
|
|
int offset;
|
|
fragment_data *ipfd_head;
|
|
tvbuff_t *next_tvb;
|
|
gboolean update_col_info = TRUE;
|
|
gboolean save_fragmented = FALSE;
|
|
const char *sep = "IPv6 ";
|
|
|
|
struct ip6_hdr ipv6;
|
|
|
|
if (check_col(pinfo->cinfo, COL_PROTOCOL))
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "IPv6");
|
|
if (check_col(pinfo->cinfo, COL_INFO))
|
|
col_clear(pinfo->cinfo, COL_INFO);
|
|
|
|
offset = 0;
|
|
tvb_memcpy(tvb, (guint8 *)&ipv6, offset, sizeof(ipv6));
|
|
|
|
/* Get extension header and payload length */
|
|
plen = g_ntohs(ipv6.ip6_plen);
|
|
|
|
/* Adjust the length of this tvbuff to include only the IPv6 datagram. */
|
|
set_actual_length(tvb, plen + sizeof (struct ip6_hdr));
|
|
|
|
SET_ADDRESS(&pinfo->net_src, AT_IPv6, 16, tvb_get_ptr(tvb, offset + IP6H_SRC, 16));
|
|
SET_ADDRESS(&pinfo->src, AT_IPv6, 16, tvb_get_ptr(tvb, offset + IP6H_SRC, 16));
|
|
SET_ADDRESS(&pinfo->net_dst, AT_IPv6, 16, tvb_get_ptr(tvb, offset + IP6H_DST, 16));
|
|
SET_ADDRESS(&pinfo->dst, AT_IPv6, 16, tvb_get_ptr(tvb, offset + IP6H_DST, 16));
|
|
|
|
if (tree) {
|
|
proto_tree* pt;
|
|
proto_item* pi;
|
|
|
|
/* !!! specify length */
|
|
ti = proto_tree_add_item(tree, proto_ipv6, tvb, offset, 40, FALSE);
|
|
ipv6_tree = proto_item_add_subtree(ti, ett_ipv6);
|
|
|
|
/* !!! warning: version also contains 4 Bit priority */
|
|
pi = proto_tree_add_item(ipv6_tree, hf_ipv6_version, tvb,
|
|
offset + offsetof(struct ip6_hdr, ip6_vfc), 1, FALSE);
|
|
pt = proto_item_add_subtree(pi,ett_ipv6_version);
|
|
pi = proto_tree_add_item(pt, hf_ip_version, tvb,
|
|
offset + offsetof(struct ip6_hdr, ip6_vfc), 1, FALSE);
|
|
PROTO_ITEM_SET_GENERATED(pi);
|
|
|
|
proto_tree_add_item(ipv6_tree, hf_ipv6_class, tvb,
|
|
offset + offsetof(struct ip6_hdr, ip6_flow), 4, FALSE);
|
|
|
|
proto_tree_add_item(ipv6_tree, hf_ipv6_flow, tvb,
|
|
offset + offsetof(struct ip6_hdr, ip6_flow), 4, FALSE);
|
|
|
|
proto_tree_add_item(ipv6_tree, hf_ipv6_plen, tvb,
|
|
offset + offsetof(struct ip6_hdr, ip6_plen), 2, FALSE);
|
|
|
|
proto_tree_add_uint_format(ipv6_tree, hf_ipv6_nxt, tvb,
|
|
offset + offsetof(struct ip6_hdr, ip6_nxt), 1,
|
|
ipv6.ip6_nxt,
|
|
"Next header: %s (0x%02x)",
|
|
ipprotostr(ipv6.ip6_nxt), ipv6.ip6_nxt);
|
|
|
|
proto_tree_add_item(ipv6_tree, hf_ipv6_hlim, tvb,
|
|
offset + offsetof(struct ip6_hdr, ip6_hlim), 1, FALSE);
|
|
|
|
/* Adds the different items for the source address */
|
|
proto_tree_add_item(ipv6_tree, hf_ipv6_src, tvb,
|
|
offset + offsetof(struct ip6_hdr, ip6_src), 16, FALSE);
|
|
ti = proto_tree_add_ipv6(ipv6_tree, hf_ipv6_addr, tvb,
|
|
offset + offsetof(struct ip6_hdr, ip6_src),
|
|
16, (guint8 *)&ipv6.ip6_src);
|
|
PROTO_ITEM_SET_HIDDEN(ti);
|
|
ti = proto_tree_add_string(ipv6_tree, hf_ipv6_src_host, tvb,
|
|
offset + offsetof(struct ip6_hdr, ip6_src),
|
|
16, get_addr_name(&pinfo->src));
|
|
PROTO_ITEM_SET_GENERATED(ti);
|
|
PROTO_ITEM_SET_HIDDEN(ti);
|
|
ti = proto_tree_add_string(ipv6_tree, hf_ipv6_host, tvb,
|
|
offset + offsetof(struct ip6_hdr, ip6_src),
|
|
16, get_addr_name(&pinfo->src));
|
|
PROTO_ITEM_SET_GENERATED(ti);
|
|
PROTO_ITEM_SET_HIDDEN(ti);
|
|
|
|
/* Adds different items for the destination address */
|
|
proto_tree_add_item(ipv6_tree, hf_ipv6_dst, tvb,
|
|
offset + offsetof(struct ip6_hdr, ip6_dst), 16, FALSE);
|
|
ti = proto_tree_add_ipv6(ipv6_tree, hf_ipv6_addr, tvb,
|
|
offset + offsetof(struct ip6_hdr, ip6_dst),
|
|
16, (guint8 *)&ipv6.ip6_dst);
|
|
PROTO_ITEM_SET_HIDDEN(ti);
|
|
ti = proto_tree_add_string(ipv6_tree, hf_ipv6_dst_host, tvb,
|
|
offset + offsetof(struct ip6_hdr, ip6_dst),
|
|
16, get_addr_name(&pinfo->dst));
|
|
PROTO_ITEM_SET_GENERATED(ti);
|
|
PROTO_ITEM_SET_HIDDEN(ti);
|
|
ti = proto_tree_add_string(ipv6_tree, hf_ipv6_host, tvb,
|
|
offset + offsetof(struct ip6_hdr, ip6_dst),
|
|
16, get_addr_name(&pinfo->dst));
|
|
PROTO_ITEM_SET_GENERATED(ti);
|
|
PROTO_ITEM_SET_HIDDEN(ti);
|
|
}
|
|
|
|
/* start of the new header (could be a extension header) */
|
|
poffset = offset + offsetof(struct ip6_hdr, ip6_nxt);
|
|
nxt = tvb_get_guint8(tvb, poffset);
|
|
offset += sizeof(struct ip6_hdr);
|
|
offlg = 0;
|
|
ident = 0;
|
|
|
|
/* start out assuming this isn't fragmented, and has none of the other
|
|
non-final headers */
|
|
hopopts = FALSE;
|
|
routing = FALSE;
|
|
frag = FALSE;
|
|
ah = FALSE;
|
|
shim6 = FALSE;
|
|
dstopts = FALSE;
|
|
|
|
again:
|
|
switch (nxt) {
|
|
|
|
case IP_PROTO_HOPOPTS:
|
|
hopopts = TRUE;
|
|
advance = dissect_hopopts(tvb, offset, ipv6_tree, pinfo);
|
|
nxt = tvb_get_guint8(tvb, offset);
|
|
poffset = offset;
|
|
offset += advance;
|
|
plen -= advance;
|
|
goto again;
|
|
|
|
case IP_PROTO_ROUTING:
|
|
routing = TRUE;
|
|
advance = dissect_routing6(tvb, offset, ipv6_tree, pinfo);
|
|
nxt = tvb_get_guint8(tvb, offset);
|
|
poffset = offset;
|
|
offset += advance;
|
|
plen -= advance;
|
|
goto again;
|
|
|
|
case IP_PROTO_FRAGMENT:
|
|
advance = dissect_frag6(tvb, offset, pinfo, ipv6_tree,
|
|
&offlg, &ident);
|
|
nxt = tvb_get_guint8(tvb, offset);
|
|
poffset = offset;
|
|
offset += advance;
|
|
plen -= advance;
|
|
frag = offlg & (IP6F_OFF_MASK | IP6F_MORE_FRAG);
|
|
save_fragmented |= frag;
|
|
if (ipv6_reassemble && frag && tvb_bytes_exist(tvb, offset, plen)) {
|
|
ipfd_head = fragment_add_check(tvb, offset, pinfo, ident,
|
|
ipv6_fragment_table,
|
|
ipv6_reassembled_table,
|
|
offlg & IP6F_OFF_MASK,
|
|
plen,
|
|
offlg & IP6F_MORE_FRAG);
|
|
next_tvb = process_reassembled_data(tvb, offset, pinfo, "Reassembled IPv6",
|
|
ipfd_head, &ipv6_frag_items, &update_col_info, ipv6_tree);
|
|
if (next_tvb) { /* Process post-fragment headers after reassembly... */
|
|
offset= 0;
|
|
offlg = 0;
|
|
frag = FALSE;
|
|
tvb = next_tvb;
|
|
goto again;
|
|
}
|
|
}
|
|
if (!(offlg & IP6F_OFF_MASK)) /*...or in the first fragment */
|
|
goto again;
|
|
break;
|
|
|
|
case IP_PROTO_AH:
|
|
ah = TRUE;
|
|
advance = dissect_ah_header(tvb_new_subset(tvb, offset, -1, -1),
|
|
pinfo, ipv6_tree, NULL, NULL);
|
|
nxt = tvb_get_guint8(tvb, offset);
|
|
poffset = offset;
|
|
offset += advance;
|
|
plen -= advance;
|
|
goto again;
|
|
|
|
case IP_PROTO_SHIM6:
|
|
shim6 = TRUE;
|
|
advance = dissect_shim6(tvb, offset, ipv6_tree, pinfo);
|
|
nxt = tvb_get_guint8(tvb, offset);
|
|
stype = tvb_get_guint8(tvb, offset+2);
|
|
poffset = offset;
|
|
offset += advance;
|
|
plen -= advance;
|
|
goto again;
|
|
|
|
case IP_PROTO_DSTOPTS:
|
|
dstopts = TRUE;
|
|
advance = dissect_dstopts(tvb, offset, ipv6_tree, pinfo);
|
|
nxt = tvb_get_guint8(tvb, offset);
|
|
poffset = offset;
|
|
offset += advance;
|
|
plen -= advance;
|
|
goto again;
|
|
|
|
default:
|
|
/* Since we did not recognize this IPv6 option, check
|
|
* whether it is a known protocol. If not, then it
|
|
* is an unknown IPv6 option
|
|
*/
|
|
if (!dissector_get_port_handle(ip_dissector_table, nxt)) {
|
|
advance = dissect_unknown_option(tvb, offset, ipv6_tree);
|
|
nxt = tvb_get_guint8(tvb, offset);
|
|
poffset = offset;
|
|
offset += advance;
|
|
plen -= advance;
|
|
goto again;
|
|
}
|
|
}
|
|
|
|
#ifdef TEST_FINALHDR
|
|
ti = proto_tree_add_uint(ipv6_tree, hf_ipv6_final, tvb, poffset, 1, nxt);
|
|
PROTO_ITEM_SET_HIDDEN(ti);
|
|
#endif
|
|
|
|
/* collect packet info */
|
|
pinfo->ipproto = nxt;
|
|
pinfo->iplen = sizeof(ipv6) + plen + offset;
|
|
pinfo->iphdrlen = offset;
|
|
|
|
if (offlg & IP6F_OFF_MASK || (ipv6_reassemble && offlg & IP6F_MORE_FRAG)) {
|
|
/* Not the first fragment, or the first when we are reassembling and there are more. */
|
|
/* Don't dissect it; just show this as a fragment. */
|
|
/* COL_INFO was filled in by "dissect_frag6()" */
|
|
call_dissector(data_handle, tvb_new_subset(tvb, offset, -1, -1), pinfo, tree);
|
|
return;
|
|
} else {
|
|
/* First fragment, not fragmented, or already reassembled. Dissect what we have here. */
|
|
|
|
/* Get a tvbuff for the payload. */
|
|
next_tvb = tvb_new_subset(tvb, offset, -1, -1);
|
|
|
|
/*
|
|
* If this is the first fragment, but not the only fragment,
|
|
* tell the next protocol that.
|
|
*/
|
|
if (offlg & IP6F_MORE_FRAG)
|
|
pinfo->fragmented = TRUE;
|
|
else
|
|
pinfo->fragmented = FALSE;
|
|
}
|
|
|
|
|
|
/* do lookup with the subdissector table */
|
|
if (!dissector_try_port(ip_dissector_table, nxt, next_tvb, pinfo, tree)) {
|
|
/* Unknown protocol.
|
|
Handle "no next header" specially. */
|
|
if (nxt == IP_PROTO_NONE) {
|
|
if (check_col(pinfo->cinfo, COL_INFO)) {
|
|
/* If we had an Authentication Header, the AH dissector already
|
|
put something in the Info column; leave it there. */
|
|
if (!ah) {
|
|
if (hopopts || routing || dstopts || shim6) {
|
|
if (hopopts) {
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, "%shop-by-hop options",
|
|
sep);
|
|
sep = ", ";
|
|
}
|
|
if (routing) {
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, "%srouting", sep);
|
|
sep = ", ";
|
|
}
|
|
if (dstopts) {
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, "%sdestination options",
|
|
sep);
|
|
}
|
|
if (shim6) {
|
|
if (stype & SHIM6_BITMASK_P) {
|
|
col_append_str(pinfo->cinfo, COL_INFO, "Shim6 (Payload)");
|
|
}
|
|
else {
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, "Shim6 (%s)",
|
|
val_to_str(stype & SHIM6_BITMASK_TYPE, shimctrlvals, "Unknown"));
|
|
}
|
|
}
|
|
} else
|
|
col_set_str(pinfo->cinfo, COL_INFO, "IPv6 no next header");
|
|
}
|
|
}
|
|
} else {
|
|
if (check_col(pinfo->cinfo, COL_INFO))
|
|
col_add_fstr(pinfo->cinfo, COL_INFO, "%s (0x%02x)", ipprotostr(nxt),nxt);
|
|
}
|
|
call_dissector(data_handle, next_tvb, pinfo, tree);
|
|
}
|
|
pinfo->fragmented = save_fragmented;
|
|
}
|
|
|
|
void
|
|
proto_register_ipv6(void)
|
|
{
|
|
static hf_register_info hf[] = {
|
|
{ &hf_ipv6_version,
|
|
{ "Version", "ipv6.version",
|
|
FT_UINT8, BASE_DEC, NULL, 0xF0, "", HFILL }},
|
|
{ &hf_ip_version,
|
|
{ "This field makes the filter \"ip.version == 6\" possible", "ip.version",
|
|
FT_UINT8, BASE_DEC, NULL, 0xF0, "", HFILL }},
|
|
{ &hf_ipv6_class,
|
|
{ "Traffic class", "ipv6.class",
|
|
FT_UINT32, BASE_HEX, NULL, 0x0FF00000, "", HFILL }},
|
|
{ &hf_ipv6_flow,
|
|
{ "Flowlabel", "ipv6.flow",
|
|
FT_UINT32, BASE_HEX, NULL, 0x000FFFFF, "", HFILL }},
|
|
{ &hf_ipv6_plen,
|
|
{ "Payload length", "ipv6.plen",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL }},
|
|
{ &hf_ipv6_nxt,
|
|
{ "Next header", "ipv6.nxt",
|
|
FT_UINT8, BASE_HEX, NULL, 0x0, "", HFILL }},
|
|
{ &hf_ipv6_hlim,
|
|
{ "Hop limit", "ipv6.hlim",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0, "", HFILL }},
|
|
{ &hf_ipv6_src,
|
|
{ "Source", "ipv6.src",
|
|
FT_IPv6, BASE_NONE, NULL, 0x0,
|
|
"Source IPv6 Address", HFILL }},
|
|
{ &hf_ipv6_src_host,
|
|
{ "Source Host", "ipv6.src_host",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
"Source IPv6 Host", HFILL }},
|
|
{ &hf_ipv6_dst,
|
|
{ "Destination", "ipv6.dst",
|
|
FT_IPv6, BASE_NONE, NULL, 0x0,
|
|
"Destination IPv6 Address", HFILL }},
|
|
{ &hf_ipv6_dst_host,
|
|
{ "Destination Host", "ipv6.dst_host",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
"Destination IPv6 Host", HFILL }},
|
|
{ &hf_ipv6_addr,
|
|
{ "Address", "ipv6.addr",
|
|
FT_IPv6, BASE_NONE, NULL, 0x0,
|
|
"Source or Destination IPv6 Address", HFILL }},
|
|
{ &hf_ipv6_host,
|
|
{ "Host", "ipv6.host",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
"IPv6 Host", HFILL }},
|
|
|
|
{ &hf_ipv6_opt_pad1,
|
|
{ "Pad1", "ipv6.opt.pad1",
|
|
FT_NONE, BASE_NONE, NULL, 0x0,
|
|
"Pad1 Option", HFILL }},
|
|
{ &hf_ipv6_opt_padn,
|
|
{ "PadN", "ipv6.opt.padn",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
"PadN Option", HFILL }},
|
|
{ &hf_ipv6_dst_opt,
|
|
{ "Destination Option ", "ipv6.dst_opt",
|
|
FT_NONE, BASE_NONE, NULL, 0x0,
|
|
"Destination Option", HFILL }},
|
|
{ &hf_ipv6_hop_opt,
|
|
{ "Hop-by-Hop Option", "ipv6.hop_opt",
|
|
FT_NONE, BASE_NONE, NULL, 0x0,
|
|
"Hop-by-Hop Option", HFILL }},
|
|
{ &hf_ipv6_unk_hdr,
|
|
{ "Unknown Extension Header", "ipv6.unknown_hdr",
|
|
FT_NONE, BASE_NONE, NULL, 0x0,
|
|
"Unknown Extension Header", HFILL }},
|
|
{ &hf_ipv6_routing_hdr_opt,
|
|
{ "Routing Header, Type ","ipv6.routing_hdr",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
"Routing Header Option", HFILL }},
|
|
{ &hf_ipv6_routing_hdr_type,
|
|
{ "Type", "ipv6.routing_hdr.type",
|
|
FT_UINT8, BASE_DEC, VALS(&routing_header_type), 0x0,
|
|
"Routeing Header Type", HFILL }},
|
|
{ &hf_ipv6_routing_hdr_left,
|
|
{ "Left Segments", "ipv6.routing_hdr.left",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
"Routing Header Left Segments", HFILL }},
|
|
{ &hf_ipv6_routing_hdr_addr,
|
|
{ "Address", "ipv6.routing_hdr.addr",
|
|
FT_IPv6, BASE_NONE, NULL, 0x0,
|
|
"Routing Header Address", HFILL }},
|
|
{ &hf_ipv6_frag_offset,
|
|
{ "Offset", "ipv6.fragment.offset",
|
|
FT_UINT16, BASE_DEC_HEX, NULL, IP6F_OFF_MASK,
|
|
"Fragment Offset", HFILL }},
|
|
{ &hf_ipv6_frag_more,
|
|
{ "More Fragment", "ipv6.fragment.more",
|
|
FT_BOOLEAN, BASE_DEC, TFS(&ipv6_more_frag), IP6F_MORE_FRAG,
|
|
"More Fragments", HFILL }},
|
|
{ &hf_ipv6_frag_id,
|
|
{ "Identification", "ipv6.framgent.id",
|
|
FT_UINT32, BASE_HEX, NULL, 0x0,
|
|
"Fragment Identification", HFILL }},
|
|
{ &hf_ipv6_fragment_overlap,
|
|
{ "Fragment overlap", "ipv6.fragment.overlap",
|
|
FT_BOOLEAN, BASE_NONE, NULL, 0x0,
|
|
"Fragment overlaps with other fragments", HFILL }},
|
|
|
|
{ &hf_ipv6_fragment_overlap_conflict,
|
|
{ "Conflicting data in fragment overlap", "ipv6.fragment.overlap.conflict",
|
|
FT_BOOLEAN, BASE_NONE, NULL, 0x0,
|
|
"Overlapping fragments contained conflicting data", HFILL }},
|
|
|
|
{ &hf_ipv6_fragment_multiple_tails,
|
|
{ "Multiple tail fragments found", "ipv6.fragment.multipletails",
|
|
FT_BOOLEAN, BASE_NONE, NULL, 0x0,
|
|
"Several tails were found when defragmenting the packet", HFILL }},
|
|
|
|
{ &hf_ipv6_fragment_too_long_fragment,
|
|
{ "Fragment too long", "ipv6.fragment.toolongfragment",
|
|
FT_BOOLEAN, BASE_NONE, NULL, 0x0,
|
|
"Fragment contained data past end of packet", HFILL }},
|
|
|
|
{ &hf_ipv6_fragment_error,
|
|
{ "Defragmentation error", "ipv6.fragment.error",
|
|
FT_FRAMENUM, BASE_NONE, NULL, 0x0,
|
|
"Defragmentation error due to illegal fragments", HFILL }},
|
|
|
|
{ &hf_ipv6_fragment,
|
|
{ "IPv6 Fragment", "ipv6.fragment",
|
|
FT_FRAMENUM, BASE_NONE, NULL, 0x0,
|
|
"IPv6 Fragment", HFILL }},
|
|
|
|
{ &hf_ipv6_fragments,
|
|
{ "IPv6 Fragments", "ipv6.fragments",
|
|
FT_NONE, BASE_NONE, NULL, 0x0,
|
|
"IPv6 Fragments", HFILL }},
|
|
|
|
{ &hf_ipv6_reassembled_in,
|
|
{ "Reassembled IPv6 in frame", "ipv6.reassembled_in",
|
|
FT_FRAMENUM, BASE_NONE, NULL, 0x0,
|
|
"This IPv6 packet is reassembled in this frame", HFILL }},
|
|
|
|
/* Mobile IPv6 */
|
|
{ &hf_ipv6_mipv6_type,
|
|
{ "Option Type ", "ipv6.mipv6_type",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
"", HFILL }},
|
|
{ &hf_ipv6_mipv6_length,
|
|
{ "Option Length ", "ipv6.mipv6_length",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
"", HFILL }},
|
|
{ &hf_ipv6_mipv6_home_address,
|
|
{ "Home Address ", "ipv6.mipv6_home_address",
|
|
FT_IPv6, BASE_HEX, NULL, 0x0,
|
|
"", HFILL }},
|
|
|
|
/* SHIM6 */
|
|
{ &hf_ipv6_shim6,
|
|
{ "SHIM6 ", "ipv6.shim6",
|
|
FT_NONE, BASE_NONE, NULL, 0x0,
|
|
"", HFILL }},
|
|
|
|
{ &hf_ipv6_shim6_nxt,
|
|
{ "Next Header", "ipv6.shim6.nxt",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
"", HFILL }},
|
|
|
|
{ &hf_ipv6_shim6_len,
|
|
{ "Header Ext Length", "ipv6.shim6.len",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
"", HFILL }},
|
|
|
|
{ &hf_ipv6_shim6_p,
|
|
{ "P Bit", "ipv6.shim6.p",
|
|
FT_BOOLEAN, BASE_NONE, NULL, SHIM6_BITMASK_P,
|
|
"", HFILL }},
|
|
|
|
{ &hf_ipv6_shim6_ct,
|
|
{ "Context Tag", "ipv6.shim6.ct",
|
|
FT_NONE, BASE_NONE, NULL, 0x0,
|
|
"", HFILL }},
|
|
|
|
{ &hf_ipv6_shim6_type,
|
|
{ "Message Type", "ipv6.shim6.type",
|
|
FT_UINT8, BASE_DEC,
|
|
VALS(shimctrlvals), SHIM6_BITMASK_TYPE,
|
|
"", HFILL }},
|
|
|
|
{ &hf_ipv6_shim6_proto,
|
|
{ "Protocol", "ipv6.shim6.proto",
|
|
FT_UINT8, BASE_DEC,
|
|
VALS(shim6_protocol), SHIM6_BITMASK_PROTOCOL,
|
|
"", HFILL }},
|
|
|
|
{ &hf_ipv6_shim6_checksum,
|
|
{ "Checksum", "ipv6.shim6.checksum",
|
|
FT_UINT16, BASE_HEX, NULL, 0x0,
|
|
"Shim6 Checksum", HFILL }},
|
|
{ &hf_ipv6_shim6_checksum_bad,
|
|
{ "Bad Checksum", "ipv6.shim6.checksum_bad",
|
|
FT_BOOLEAN, BASE_NONE, NULL, 0x0,
|
|
"Shim6 Bad Checksum", HFILL }},
|
|
|
|
{ &hf_ipv6_shim6_checksum_good,
|
|
{ "Good Checksum", "ipv6.shim6.checksum_good",
|
|
FT_BOOLEAN, BASE_NONE, NULL, 0x0,
|
|
"", HFILL }},
|
|
|
|
{ &hf_ipv6_shim6_inonce,
|
|
{ "Initiator Nonce", "ipv6.shim6.inonce",
|
|
FT_UINT32, BASE_DEC_HEX, NULL, 0x0,
|
|
"", HFILL }},
|
|
|
|
{ &hf_ipv6_shim6_rnonce,
|
|
{ "Responder Nonce", "ipv6.shim6.rnonce",
|
|
FT_UINT32, BASE_DEC_HEX, NULL, 0x0,
|
|
"", HFILL }},
|
|
|
|
{ &hf_ipv6_shim6_precvd,
|
|
{ "Probes Received", "ipv6.shim6.precvd",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
"", HFILL }},
|
|
|
|
{ &hf_ipv6_shim6_psent,
|
|
{ "Probes Sent", "ipv6.shim6.psent",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
"", HFILL }},
|
|
|
|
{ &hf_ipv6_shim6_psrc,
|
|
{ "Source Address", "ipv6.shim6.psrc",
|
|
FT_IPv6, BASE_NONE, NULL, 0x0,
|
|
"Shim6 Probe Source Address", HFILL }},
|
|
|
|
{ &hf_ipv6_shim6_pdst,
|
|
{ "Destination Address", "ipv6.shim6.pdst",
|
|
FT_IPv6, BASE_NONE, NULL, 0x0,
|
|
"Shim6 Probe Destination Address", HFILL }},
|
|
|
|
{ &hf_ipv6_shim6_pnonce,
|
|
{ "Nonce", "ipv6.shim6.pnonce",
|
|
FT_UINT32, BASE_DEC_HEX, NULL, 0x0,
|
|
"Shim6 Probe Nonce", HFILL }},
|
|
|
|
{ &hf_ipv6_shim6_pdata,
|
|
{ "Data", "ipv6.shim6.pdata",
|
|
FT_UINT32, BASE_HEX, NULL, 0x0,
|
|
"Shim6 Probe Data", HFILL }},
|
|
|
|
{ &hf_ipv6_shim6_sulid,
|
|
{ "Sender ULID", "ipv6.shim6.sulid",
|
|
FT_IPv6, BASE_NONE, NULL, 0x0,
|
|
"Shim6 Sender ULID", HFILL }},
|
|
|
|
{ &hf_ipv6_shim6_rulid,
|
|
{ "Receiver ULID", "ipv6.shim6.rulid",
|
|
FT_IPv6, BASE_NONE, NULL, 0x0,
|
|
"Shim6 Receiver ULID", HFILL }},
|
|
|
|
{ &hf_ipv6_shim6_reap,
|
|
{ "REAP State", "ipv6.shim6.reap",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
"", HFILL }},
|
|
|
|
{ &hf_ipv6_shim6_opt_type,
|
|
{ "Option Type", "ipv6.shim6.opt.type",
|
|
FT_UINT16, BASE_DEC,
|
|
VALS(shimoptvals), SHIM6_BITMASK_OPT_TYPE,
|
|
"Shim6 Option Type", HFILL }},
|
|
|
|
{ &hf_ipv6_shim6_opt_critical,
|
|
{ "Option Critical Bit", "ipv6.shim6.opt.critical",
|
|
FT_BOOLEAN, BASE_NONE,
|
|
TFS(&shim6_critical_opts),
|
|
SHIM6_BITMASK_CRITICAL,
|
|
"TRUE : option is critical, "
|
|
"FALSE: option is not critical",
|
|
HFILL }},
|
|
|
|
{ &hf_ipv6_shim6_opt_len,
|
|
{ "Content Length", "ipv6.shim6.opt.len",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
"Content Length Option", HFILL }},
|
|
|
|
{ &hf_ipv6_shim6_opt_total_len,
|
|
{ "Total Length", "ipv6.shim6.opt.total_len",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
"Total Option Length", HFILL }},
|
|
|
|
{ &hf_ipv6_shim6_opt_loc_verif_methods,
|
|
{ "Verification Method", "ipv6.shim6.opt.verif_method",
|
|
FT_UINT8, BASE_DEC,
|
|
VALS(shimverifmethods), 0x0,
|
|
"Locator Verification Method", HFILL }},
|
|
|
|
{ &hf_ipv6_shim6_opt_loclist,
|
|
{ "Locator List Generation", "ipv6.shim6.opt.loclist",
|
|
FT_UINT32, BASE_DEC_HEX, NULL, 0x0,
|
|
"", HFILL }},
|
|
|
|
{ &hf_ipv6_shim6_locator,
|
|
{ "Locator", "ipv6.shim6.locator",
|
|
FT_IPv6, BASE_NONE, NULL, 0x0,
|
|
"Shim6 Locator", HFILL }},
|
|
|
|
{ &hf_ipv6_shim6_opt_locnum,
|
|
{ "Num Locators", "ipv6.shim6.opt.locnum",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
"Number of Locators in Locator List", HFILL }},
|
|
|
|
{ &hf_ipv6_shim6_opt_elemlen,
|
|
{ "Element Length", "ipv6.shim6.opt.elemlen",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
"Length of Elements in Locator Preferences Option", HFILL }},
|
|
{ &hf_ipv6_shim6_loc_flag,
|
|
{ "Flags", "ipv6.shim6.loc.flags",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
"Locator Preferences Flags", HFILL }},
|
|
|
|
{ &hf_ipv6_shim6_loc_prio,
|
|
{ "Priority", "ipv6.shim6.loc.prio",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
"Locator Preferences Priority", HFILL }},
|
|
|
|
{ &hf_ipv6_shim6_loc_weight,
|
|
{ "Weight", "ipv6.shim6.loc.weight",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
"Locator Preferences Weight", HFILL }},
|
|
|
|
{ &hf_ipv6_shim6_opt_fii,
|
|
{ "Forked Instance Identifier", "ipv6.shim6.opt.fii",
|
|
FT_UINT32, BASE_DEC_HEX, NULL, 0x0,
|
|
"", HFILL }},
|
|
|
|
#ifdef TEST_FINALHDR
|
|
{ &hf_ipv6_final,
|
|
{ "Final next header", "ipv6.final",
|
|
FT_UINT8, BASE_HEX, NULL, 0x0, "", HFILL }},
|
|
#endif
|
|
};
|
|
static gint *ett[] = {
|
|
&ett_ipv6,
|
|
&ett_ipv6_version,
|
|
&ett_ipv6_shim6,
|
|
&ett_ipv6_shim6_option,
|
|
&ett_ipv6_shim6_locators,
|
|
&ett_ipv6_shim6_verif_methods,
|
|
&ett_ipv6_shim6_loc_pref,
|
|
&ett_ipv6_shim6_probes_sent,
|
|
&ett_ipv6_shim6_probes_rcvd,
|
|
&ett_ipv6_shim6_probe_sent,
|
|
&ett_ipv6_shim6_probe_rcvd,
|
|
&ett_ipv6_shim6_cksum,
|
|
&ett_ipv6_fragments,
|
|
&ett_ipv6_fragment
|
|
};
|
|
module_t *ipv6_module;
|
|
|
|
proto_ipv6 = proto_register_protocol("Internet Protocol Version 6", "IPv6", "ipv6");
|
|
proto_register_field_array(proto_ipv6, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
|
|
/* Register configuration options */
|
|
ipv6_module = prefs_register_protocol(proto_ipv6, NULL);
|
|
prefs_register_bool_preference(ipv6_module, "defragment",
|
|
"Reassemble fragmented IPv6 datagrams",
|
|
"Whether fragmented IPv6 datagrams should be reassembled",
|
|
&ipv6_reassemble);
|
|
|
|
register_dissector("ipv6", dissect_ipv6, proto_ipv6);
|
|
register_init_routine(ipv6_reassemble_init);
|
|
}
|
|
|
|
void
|
|
proto_reg_handoff_ipv6(void)
|
|
{
|
|
dissector_handle_t ipv6_handle;
|
|
|
|
data_handle = find_dissector("data");
|
|
ipv6_handle = find_dissector("ipv6");
|
|
dissector_add("ethertype", ETHERTYPE_IPv6, ipv6_handle);
|
|
dissector_add("ppp.protocol", PPP_IPV6, ipv6_handle);
|
|
dissector_add("ppp.protocol", ETHERTYPE_IPv6, ipv6_handle);
|
|
dissector_add("gre.proto", ETHERTYPE_IPv6, ipv6_handle);
|
|
dissector_add("ip.proto", IP_PROTO_IPV6, ipv6_handle);
|
|
dissector_add("null.type", BSD_AF_INET6_BSD, ipv6_handle);
|
|
dissector_add("null.type", BSD_AF_INET6_FREEBSD, ipv6_handle);
|
|
dissector_add("null.type", BSD_AF_INET6_DARWIN, ipv6_handle);
|
|
dissector_add("chdlctype", ETHERTYPE_IPv6, ipv6_handle);
|
|
dissector_add("fr.ietf", NLPID_IP6, ipv6_handle);
|
|
dissector_add("osinl.excl", NLPID_IP6, ipv6_handle);
|
|
dissector_add("x.25.spi", NLPID_IP6, ipv6_handle);
|
|
dissector_add("arcnet.protocol_id", ARCNET_PROTO_IPv6, ipv6_handle);
|
|
|
|
ip_dissector_table = find_dissector_table("ip.proto");
|
|
}
|