osmocom
/
wireshark
11
0
Fork 1
Code Issues Pull Requests Projects Releases Wiki Activity
wireshark/epan/dissectors/packet-ipv6.c

1946 lines
60 KiB
C
Raw Blame History

/* packet-ipv6.c
* Routines for IPv6 packet disassembly
*
* $Id$
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SHIM6 support added by Matthijs Mekking <matthijs@NLnetLabs.nl>
*
* MobileIPv6 support added by Tomislav Borosa <tomislav.borosa@siemens.hr>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <string.h>
#include <math.h>
#include <stdio.h>
#include <glib.h>
#include <epan/packet.h>
#include "packet-ipsec.h"
#include "packet-ipv6.h"
#include <epan/ip_opts.h>
#include <epan/addr_resolv.h>
#include <epan/prefs.h>
#include <epan/reassemble.h>
#include <epan/ipproto.h>
#include <epan/ipv6-utils.h>
#include <epan/etypes.h>
#include <epan/ppptypes.h>
#include <epan/aftypes.h>
#include <epan/nlpid.h>
#include <epan/arcnet_pids.h>
#include <epan/in_cksum.h>
#include <epan/value_string.h>
#include <epan/expert.h>
#include <epan/emem.h>
/*
* NOTE: ipv6.nxt is not very useful as we will have chained header.
* now testing ipv6.final, but it raises SEGV.
#define TEST_FINALHDR
*/
static int proto_ipv6 = -1;
static int hf_ipv6_version = -1;
static int hf_ip_version = -1;
static int hf_ipv6_class = -1;
static int hf_ipv6_flow = -1;
static int hf_ipv6_plen = -1;
static int hf_ipv6_nxt = -1;
static int hf_ipv6_hlim = -1;
static int hf_ipv6_src = -1;
static int hf_ipv6_src_host = -1;
static int hf_ipv6_dst = -1;
static int hf_ipv6_dst_host = -1;
static int hf_ipv6_addr = -1;
static int hf_ipv6_host = -1;
static int hf_ipv6_opt_pad1 = -1;
static int hf_ipv6_opt_padn = -1;
static int hf_ipv6_dst_opt = -1;
static int hf_ipv6_hop_opt = -1;
static int hf_ipv6_unk_hdr = -1;
static int hf_ipv6_routing_hdr_opt = -1;
static int hf_ipv6_routing_hdr_type = -1;
static int hf_ipv6_routing_hdr_left = -1;
static int hf_ipv6_routing_hdr_addr = -1;
#ifdef TEST_FINALHDR
static int hf_ipv6_final = -1;
#endif
static int hf_ipv6_frag_offset = -1;
static int hf_ipv6_frag_more = -1;
static int hf_ipv6_frag_id = -1;
static int hf_ipv6_fragments = -1;
static int hf_ipv6_fragment = -1;
static int hf_ipv6_fragment_overlap = -1;
static int hf_ipv6_fragment_overlap_conflict = -1;
static int hf_ipv6_fragment_multiple_tails = -1;
static int hf_ipv6_fragment_too_long_fragment = -1;
static int hf_ipv6_fragment_error = -1;
static int hf_ipv6_reassembled_in = -1;
static int hf_ipv6_mipv6_type = -1;
static int hf_ipv6_mipv6_length = -1;
static int hf_ipv6_mipv6_home_address = -1;
static int hf_ipv6_shim6 = -1;
static int hf_ipv6_shim6_nxt = -1;
static int hf_ipv6_shim6_len = -1;
static int hf_ipv6_shim6_p = -1;
/* context tag is 49 bits, cannot be used for filter yet */
static int hf_ipv6_shim6_ct = -1;
static int hf_ipv6_shim6_type = -1;
static int hf_ipv6_shim6_proto = -1;
static int hf_ipv6_shim6_checksum = -1;
static int hf_ipv6_shim6_checksum_bad = -1;
static int hf_ipv6_shim6_checksum_good= -1;
static int hf_ipv6_shim6_inonce = -1; /* also for request nonce */
static int hf_ipv6_shim6_rnonce = -1;
static int hf_ipv6_shim6_precvd = -1;
static int hf_ipv6_shim6_psent = -1;
static int hf_ipv6_shim6_psrc = -1;
static int hf_ipv6_shim6_pdst = -1;
static int hf_ipv6_shim6_pnonce = -1;
static int hf_ipv6_shim6_pdata = -1;
static int hf_ipv6_shim6_sulid = -1;
static int hf_ipv6_shim6_rulid = -1;
static int hf_ipv6_shim6_reap = -1;
static int hf_ipv6_shim6_opt_type = -1;
static int hf_ipv6_shim6_opt_len = -1;
static int hf_ipv6_shim6_opt_total_len= -1;
static int hf_ipv6_shim6_opt_loc_verif_methods = -1;
static int hf_ipv6_shim6_opt_critical = -1;
static int hf_ipv6_shim6_opt_loclist = -1;
static int hf_ipv6_shim6_locator = -1;
static int hf_ipv6_shim6_loc_flag = -1;
static int hf_ipv6_shim6_loc_prio = -1;
static int hf_ipv6_shim6_loc_weight = -1;
static int hf_ipv6_shim6_opt_locnum = -1;
static int hf_ipv6_shim6_opt_elemlen = -1;
static int hf_ipv6_shim6_opt_fii = -1;
static gint ett_ipv6 = -1;
static gint ett_ipv6_version = -1;
static gint ett_ipv6_shim6 = -1;
static gint ett_ipv6_shim6_option = -1;
static gint ett_ipv6_shim6_locators = -1;
static gint ett_ipv6_shim6_verif_methods = -1;
static gint ett_ipv6_shim6_loc_pref = -1;
static gint ett_ipv6_shim6_probes_sent = -1;
static gint ett_ipv6_shim6_probe_sent = -1;
static gint ett_ipv6_shim6_probes_rcvd = -1;
static gint ett_ipv6_shim6_probe_rcvd = -1;
static gint ett_ipv6_shim6_cksum = -1;
static gint ett_ipv6_fragments = -1;
static gint ett_ipv6_fragment = -1;
static const fragment_items ipv6_frag_items = {
&ett_ipv6_fragment,
&ett_ipv6_fragments,
&hf_ipv6_fragments,
&hf_ipv6_fragment,
&hf_ipv6_fragment_overlap,
&hf_ipv6_fragment_overlap_conflict,
&hf_ipv6_fragment_multiple_tails,
&hf_ipv6_fragment_too_long_fragment,
&hf_ipv6_fragment_error,
&hf_ipv6_reassembled_in,
"fragments"
};
static dissector_handle_t data_handle;
static dissector_table_t ip_dissector_table;
/* Reassemble fragmented datagrams */
static gboolean ipv6_reassemble = TRUE;
#ifndef offsetof
#define offsetof(type, member) ((size_t)(&((type *)0)->member))
#endif
/*
* defragmentation of IPv6
*/
static GHashTable *ipv6_fragment_table = NULL;
static GHashTable *ipv6_reassembled_table = NULL;
void
capture_ipv6(const guchar *pd, int offset, int len, packet_counts *ld)
{
guint8 nxt;
int advance;
if (!BYTES_ARE_IN_FRAME(offset, len, 4+4+16+16)) {
ld->other++;
return;
}
nxt = pd[offset+6]; /* get the "next header" value */
offset += 4+4+16+16; /* skip past the IPv6 header */
again:
switch (nxt) {
case IP_PROTO_HOPOPTS:
case IP_PROTO_ROUTING:
case IP_PROTO_DSTOPTS:
if (!BYTES_ARE_IN_FRAME(offset, len, 2)) {
ld->other++;
return;
}
nxt = pd[offset];
advance = (pd[offset+1] + 1) << 3;
if (!BYTES_ARE_IN_FRAME(offset, len, advance)) {
ld->other++;
return;
}
offset += advance;
goto again;
case IP_PROTO_FRAGMENT:
if (!BYTES_ARE_IN_FRAME(offset, len, 2)) {
ld->other++;
return;
}
nxt = pd[offset];
advance = 8;
if (!BYTES_ARE_IN_FRAME(offset, len, advance)) {
ld->other++;
return;
}
offset += advance;
goto again;
case IP_PROTO_AH:
if (!BYTES_ARE_IN_FRAME(offset, len, 2)) {
ld->other++;
return;
}
nxt = pd[offset];
advance = 8 + ((pd[offset+1] - 1) << 2);
if (!BYTES_ARE_IN_FRAME(offset, len, advance)) {
ld->other++;
return;
}
offset += advance;
goto again;
case IP_PROTO_SHIM6:
case IP_PROTO_SHIM6_OLD:
if (!BYTES_ARE_IN_FRAME(offset, len, 2)) {
ld->other++;
return;
}
nxt = pd[offset];
advance = (pd[offset+1] + 1) << 3;
if (!BYTES_ARE_IN_FRAME(offset, len, advance)) {
ld->other++;
return;
}
offset += advance;
goto again;
}
switch(nxt) {
case IP_PROTO_SCTP:
ld->sctp++;
break;
case IP_PROTO_TCP:
ld->tcp++;
break;
case IP_PROTO_UDP:
case IP_PROTO_UDPLITE:
ld->udp++;
break;
case IP_PROTO_ICMP:
case IP_PROTO_ICMPV6: /* XXX - separate counters? */
ld->icmp++;
break;
case IP_PROTO_OSPF:
ld->ospf++;
break;
case IP_PROTO_GRE:
ld->gre++;
break;
case IP_PROTO_VINES:
ld->vines++;
break;
default:
ld->other++;
}
}
static void
ipv6_reassemble_init(void)
{
fragment_table_init(&ipv6_fragment_table);
reassembled_table_init(&ipv6_reassembled_table);
}
enum {
IPv6_RT_HEADER_SOURCE_ROUTING=0,
IPv6_RT_HEADER_NIMROD,
IPv6_RT_HEADER_MobileIP
};
/* Routeing Header Types */
static const value_string routing_header_type[] = {
{ IPv6_RT_HEADER_SOURCE_ROUTING, "IPv6 Source Routing" },
{ IPv6_RT_HEADER_NIMROD, "Nimrod" },
{ IPv6_RT_HEADER_MobileIP, "Mobile IP" },
{ 0, NULL }
};
static int
dissect_routing6(tvbuff_t *tvb, int offset, proto_tree *tree, packet_info *pinfo) {
struct ip6_rthdr rt;
guint len;
proto_tree *rthdr_tree;
proto_item *ti;
guint8 buf[sizeof(struct ip6_rthdr0) + sizeof(struct e_in6_addr) * 23];
tvb_memcpy(tvb, (guint8 *)&rt, offset, sizeof(rt));
len = (rt.ip6r_len + 1) << 3;
if (tree) {
/* !!! specify length */
ti = proto_tree_add_uint_format(tree, hf_ipv6_routing_hdr_opt, tvb,
offset, len, rt.ip6r_type,
"Routing Header, Type : %s (%u)",
val_to_str(rt.ip6r_type, routing_header_type, "Unknown"),
rt.ip6r_type);
rthdr_tree = proto_item_add_subtree(ti, ett_ipv6);
proto_tree_add_text(rthdr_tree, tvb,
offset + offsetof(struct ip6_rthdr, ip6r_nxt), 1,
"Next header: %s (0x%02x)", ipprotostr(rt.ip6r_nxt), rt.ip6r_nxt);
proto_tree_add_text(rthdr_tree, tvb,
offset + offsetof(struct ip6_rthdr, ip6r_len), 1,
"Length: %u (%d bytes)", rt.ip6r_len, len);
proto_tree_add_item(rthdr_tree, hf_ipv6_routing_hdr_type, tvb,
offset + offsetof(struct ip6_rthdr, ip6r_type), 1, FALSE);
proto_tree_add_item(rthdr_tree, hf_ipv6_routing_hdr_left, tvb,
offset + offsetof(struct ip6_rthdr, ip6r_segleft), 1, FALSE);
if (rt.ip6r_type == IPv6_RT_HEADER_SOURCE_ROUTING && len <= sizeof(buf)) {
struct e_in6_addr *a;
int n;
struct ip6_rthdr0 *rt0;
tvb_memcpy(tvb, buf, offset, len);
rt0 = (struct ip6_rthdr0 *)buf;
for (a = rt0->ip6r0_addr, n = 0;
a < (struct e_in6_addr *)(buf + len); a++, n++) {
proto_tree_add_item(rthdr_tree, hf_ipv6_routing_hdr_addr, tvb,
offset + offsetof(struct ip6_rthdr0, ip6r0_addr)
+ n * sizeof(struct e_in6_addr),
sizeof(struct e_in6_addr), FALSE);
SET_ADDRESS(&pinfo->dst, AT_IPv6, 16, tvb_get_ptr(tvb,
offset + offsetof(struct ip6_rthdr0, ip6r0_addr)
+ n * sizeof(struct e_in6_addr), 16));
}
}
if (rt.ip6r_type == IPv6_RT_HEADER_MobileIP) {
proto_tree_add_item(rthdr_tree, hf_ipv6_mipv6_home_address, tvb,
offset + 8, 16, FALSE);
SET_ADDRESS(&pinfo->dst, AT_IPv6, 16, tvb_get_ptr(tvb, offset + 8, 16));
}
}
return len;
}
static int
dissect_frag6(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree,
guint16 *offlg, guint32 *ident) {
struct ip6_frag frag;
int len;
proto_item *ti;
proto_tree *rthdr_tree;
tvb_memcpy(tvb, (guint8 *)&frag, offset, sizeof(frag));
len = sizeof(frag);
frag.ip6f_offlg = g_ntohs(frag.ip6f_offlg);
frag.ip6f_ident = g_ntohl(frag.ip6f_ident);
*offlg = frag.ip6f_offlg;
*ident = frag.ip6f_ident;
if (check_col(pinfo->cinfo, COL_INFO)) {
col_add_fstr(pinfo->cinfo, COL_INFO,
"IPv6 fragment (nxt=%s (0x%02x) off=%u id=0x%x)",
ipprotostr(frag.ip6f_nxt), frag.ip6f_nxt,
frag.ip6f_offlg & IP6F_OFF_MASK, frag.ip6f_ident);
}
if (tree) {
ti = proto_tree_add_text(tree, tvb, offset, len,
"Fragmentation Header");
rthdr_tree = proto_item_add_subtree(ti, ett_ipv6);
proto_tree_add_text(rthdr_tree, tvb,
offset + offsetof(struct ip6_frag, ip6f_nxt), 1,
"Next header: %s (0x%02x)",
ipprotostr(frag.ip6f_nxt), frag.ip6f_nxt);
#if 0
proto_tree_add_text(rthdr_tree, tvb,
offset + offsetof(struct ip6_frag, ip6f_reserved), 1,
"Reserved: %u",
frag.ip6f_reserved);
#endif
proto_tree_add_item(rthdr_tree, hf_ipv6_frag_offset, tvb,
offset + offsetof(struct ip6_frag, ip6f_offlg), 2, FALSE);
proto_tree_add_item(rthdr_tree, hf_ipv6_frag_more, tvb,
offset + offsetof(struct ip6_frag, ip6f_offlg), 2, FALSE);
proto_tree_add_item(rthdr_tree, hf_ipv6_frag_id, tvb,
offset + offsetof(struct ip6_frag, ip6f_ident), 4, FALSE);
}
return len;
}
static int
dissect_mipv6_hoa(tvbuff_t *tvb, proto_tree *dstopt_tree, int offset, packet_info *pinfo)
{
int len = 0;
proto_tree_add_uint_format(dstopt_tree, hf_ipv6_mipv6_type, tvb,
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 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;
col_set_str(pinfo->cinfo, COL_PROTOCOL, "IPv6");
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:
case IP_PROTO_SHIM6_OLD:
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;
case IP_PROTO_NONE:
break;
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, NULL, HFILL }},
{ &hf_ip_version,
{ "This field makes the filter \"ip.version == 6\" possible", "ip.version",
FT_UINT8, BASE_DEC, NULL, 0xF0, NULL, HFILL }},
{ &hf_ipv6_class,
{ "Traffic class", "ipv6.class",
FT_UINT32, BASE_HEX, NULL, 0x0FF00000, NULL, HFILL }},
{ &hf_ipv6_flow,
{ "Flowlabel", "ipv6.flow",
FT_UINT32, BASE_HEX, NULL, 0x000FFFFF, NULL, HFILL }},
{ &hf_ipv6_plen,
{ "Payload length", "ipv6.plen",
FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
{ &hf_ipv6_nxt,
{ "Next header", "ipv6.nxt",
FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
{ &hf_ipv6_hlim,
{ "Hop limit", "ipv6.hlim",
FT_UINT8, BASE_DEC, NULL, 0x0, NULL, 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,
NULL, HFILL }},
{ &hf_ipv6_hop_opt,
{ "Hop-by-Hop Option", "ipv6.hop_opt",
FT_NONE, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
{ &hf_ipv6_unk_hdr,
{ "Unknown Extension Header", "ipv6.unknown_hdr",
FT_NONE, BASE_NONE, NULL, 0x0,
NULL, 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, 16, TFS(&tfs_yes_no), 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,
NULL, HFILL }},
{ &hf_ipv6_fragments,
{ "IPv6 Fragments", "ipv6.fragments",
FT_NONE, BASE_NONE, NULL, 0x0,
NULL, 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,
NULL, HFILL }},
{ &hf_ipv6_mipv6_length,
{ "Option Length", "ipv6.mipv6_length",
FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_ipv6_mipv6_home_address,
{ "Home Address", "ipv6.mipv6_home_address",
FT_IPv6, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
/* SHIM6 */
{ &hf_ipv6_shim6,
{ "SHIM6", "ipv6.shim6",
FT_NONE, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
{ &hf_ipv6_shim6_nxt,
{ "Next Header", "ipv6.shim6.nxt",
FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_ipv6_shim6_len,
{ "Header Ext Length", "ipv6.shim6.len",
FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_ipv6_shim6_p,
{ "P Bit", "ipv6.shim6.p",
FT_BOOLEAN, 8, NULL, SHIM6_BITMASK_P,
NULL, HFILL }},
{ &hf_ipv6_shim6_ct,
{ "Context Tag", "ipv6.shim6.ct",
FT_NONE, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
{ &hf_ipv6_shim6_type,
{ "Message Type", "ipv6.shim6.type",
FT_UINT8, BASE_DEC,
VALS(shimctrlvals), SHIM6_BITMASK_TYPE,
NULL, HFILL }},
{ &hf_ipv6_shim6_proto,
{ "Protocol", "ipv6.shim6.proto",
FT_UINT8, BASE_DEC,
VALS(shim6_protocol), SHIM6_BITMASK_PROTOCOL,
NULL, 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,
NULL, HFILL }},
{ &hf_ipv6_shim6_inonce,
{ "Initiator Nonce", "ipv6.shim6.inonce",
FT_UINT32, BASE_DEC_HEX, NULL, 0x0,
NULL, HFILL }},
{ &hf_ipv6_shim6_rnonce,
{ "Responder Nonce", "ipv6.shim6.rnonce",
FT_UINT32, BASE_DEC_HEX, NULL, 0x0,
NULL, HFILL }},
{ &hf_ipv6_shim6_precvd,
{ "Probes Received", "ipv6.shim6.precvd",
FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_ipv6_shim6_psent,
{ "Probes Sent", "ipv6.shim6.psent",
FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, 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,
NULL, 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, 8,
TFS(&tfs_yes_no),
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,
NULL, 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,
NULL, 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");
}
Reference in New Issue View Git Blame Copy Permalink