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wireshark/packet-ipv6.c

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/* packet-ipv6.c
* Routines for IPv6 packet disassembly
*
* $Id: packet-ipv6.c,v 1.51 2001/01/23 02:49:55 gerald Exp $
*
* Ethereal - Network traffic analyzer
* By Gerald Combs <gerald@ethereal.com>
*
* Copyright 1998 Gerald Combs
*
* 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
#ifdef HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
#ifdef HAVE_SYS_SOCKET_h
#include <sys/socket.h>
#endif
#ifdef HAVE_NETINET_IN_H
# include <netinet/in.h>
#endif
#include <string.h>
#include <stdio.h>
#include <glib.h>
#include "etypes.h"
#include "ppptypes.h"
#include "aftypes.h"
#include "packet.h"
#include "packet-ip.h"
#include "packet-ipsec.h"
#include "packet-ipv6.h"
#include "packet-tcp.h"
#include "packet-udp.h"
#include "resolv.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_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_dst = -1;
static int hf_ipv6_addr = -1;
#ifdef TEST_FINALHDR
static int hf_ipv6_final = -1;
#endif
/* BT INSERT BEGIN */
static int hf_ipv6_mipv6_type = -1;
static int hf_ipv6_mipv6_length = -1;
static int hf_ipv6_mipv6_a_flag = -1;
static int hf_ipv6_mipv6_h_flag = -1;
static int hf_ipv6_mipv6_r_flag = -1;
static int hf_ipv6_mipv6_d_flag = -1;
static int hf_ipv6_mipv6_m_flag = -1;
static int hf_ipv6_mipv6_b_flag = -1;
static int hf_ipv6_mipv6_prefix_length = -1;
static int hf_ipv6_mipv6_sequence_number = -1;
static int hf_ipv6_mipv6_life_time = -1;
static int hf_ipv6_mipv6_status = -1;
static int hf_ipv6_mipv6_refresh = -1;
static int hf_ipv6_mipv6_home_address = -1;
static int hf_ipv6_mipv6_sub_type = -1;
static int hf_ipv6_mipv6_sub_length = -1;
static int hf_ipv6_mipv6_sub_unique_ID = -1;
static int hf_ipv6_mipv6_sub_alternative_COA = -1;
/* BT INSERT END */
static gint ett_ipv6 = -1;
#ifndef offsetof
#define offsetof(type, member) ((size_t)(&((type *)0)->member))
#endif
static int
dissect_routing6(const u_char *pd, int offset, frame_data *fd, proto_tree *tree) {
struct ip6_rthdr rt;
int len;
proto_tree *rthdr_tree;
proto_item *ti;
char buf[sizeof(struct ip6_rthdr0) + sizeof(struct e_in6_addr) * 23];
memcpy(&rt, (void *) &pd[offset], sizeof(rt));
len = (rt.ip6r_len + 1) << 3;
if (tree) {
/* !!! specify length */
ti = proto_tree_add_text(tree, NullTVB, offset, len,
"Routing Header, Type %u", rt.ip6r_type);
rthdr_tree = proto_item_add_subtree(ti, ett_ipv6);
proto_tree_add_text(rthdr_tree, NullTVB,
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, NullTVB,
offset + offsetof(struct ip6_rthdr, ip6r_len), 1,
"Length: %u (%d bytes)", rt.ip6r_len, len);
proto_tree_add_text(rthdr_tree, NullTVB,
offset + offsetof(struct ip6_rthdr, ip6r_type), 1,
"Type: %u", rt.ip6r_type);
proto_tree_add_text(rthdr_tree, NullTVB,
offset + offsetof(struct ip6_rthdr, ip6r_segleft), 1,
"Segments left: %u", rt.ip6r_segleft);
if (rt.ip6r_type == 0 && len <= sizeof(buf)) {
struct e_in6_addr *a;
int n;
struct ip6_rthdr0 *rt0;
memcpy(buf, (void *) &pd[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_text(rthdr_tree, NullTVB,
offset + offsetof(struct ip6_rthdr0, ip6r0_addr) + n * sizeof(struct e_in6_addr),
sizeof(struct e_in6_addr),
#ifdef INET6
"address %d: %s (%s)",
n, get_hostname6(a), ip6_to_str(a)
#else
"address %d: %s", n, ip6_to_str(a)
#endif
);
}
}
/* decode... */
}
return len;
}
static int
dissect_frag6(const u_char *pd, int offset, frame_data *fd, proto_tree *tree,
int *fragstart) {
struct ip6_frag frag;
int len;
proto_item *ti;
proto_tree *rthdr_tree;
memcpy(&frag, (void *) &pd[offset], sizeof(frag));
len = sizeof(frag);
frag.ip6f_offlg = ntohs(frag.ip6f_offlg);
*fragstart = frag.ip6f_offlg & IP6F_OFF_MASK;
if (check_col(fd, COL_INFO)) {
col_add_fstr(fd, COL_INFO,
"IPv6 fragment (nxt=%s (0x%02x) off=%u id=0x%x)",
ipprotostr(frag.ip6f_nxt), frag.ip6f_nxt,
*fragstart, frag.ip6f_ident);
}
if (tree) {
ti = proto_tree_add_text(tree, NullTVB, offset, len,
"Fragmention Header");
rthdr_tree = proto_item_add_subtree(ti, ett_ipv6);
proto_tree_add_text(rthdr_tree, NullTVB,
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, NullTVB,
offset + offsetof(struct ip6_frag, ip6f_reserved), 1,
"Reserved: %u",
frag.ip6f_reserved);
#endif
proto_tree_add_text(rthdr_tree, NullTVB,
offset + offsetof(struct ip6_frag, ip6f_offlg), 2,
"Offset: %u",
frag.ip6f_offlg & IP6F_OFF_MASK);
proto_tree_add_text(rthdr_tree, NullTVB,
offset + offsetof(struct ip6_frag, ip6f_offlg), 2,
"More fragments: %s",
frag.ip6f_offlg & IP6F_MORE_FRAG ?
"Yes" : "No");
proto_tree_add_text(rthdr_tree, NullTVB,
offset + offsetof(struct ip6_frag, ip6f_ident), 4,
"Identification: 0x%08x",
frag.ip6f_ident);
}
return len;
}
/* BT INSERT BEGIN */
static int
dissect_mipv6_ba(tvbuff_t *tvb, proto_tree *dstopt_tree, int offset) {
guint8 status, len=0;
gchar status_text[80]="";
gboolean sub_options=FALSE;
proto_tree_add_uint_format(dstopt_tree, hf_ipv6_mipv6_type, tvb, offset+len,
IP6_MIPv6_OPTION_TYPE_LENGTH, tvb_get_guint8(tvb,offset+len),
"Option Type: %u (0x%02x) - Binding Acknowledgement", tvb_get_guint8(tvb,offset+len),
tvb_get_guint8(tvb,offset+len));
len+=IP6_MIPv6_OPTION_TYPE_LENGTH;
if (tvb_get_guint8(tvb,offset+len)>11)
sub_options=TRUE;
proto_tree_add_uint(dstopt_tree, hf_ipv6_mipv6_length, tvb, offset+len,
IP6_MIPv6_OPTION_LENGTH_LENGTH, tvb_get_guint8(tvb,offset+len));
len+=IP6_MIPv6_OPTION_LENGTH_LENGTH;
status = tvb_get_guint8(tvb,offset+len);
switch (status){
case BA_OK:
strcpy(status_text,"- Binding Update accepted");
break;
case BA_REAS_UNSPEC:
strcpy(status_text,"- Binding Update was rejected - Reason unspecified");
break;
case BA_ADMIN_PROH:
strcpy(status_text,"- Binding Update was rejected - Administratively prohibited");
break;
case BA_INSUF_RES:
strcpy(status_text,"- Binding Update was rejected - Insufficient resources");
break;
case BA_NO_HR:
strcpy(status_text,"- Binding Update was rejected - Home registration not supported");
break;
case BA_NO_SUBNET:
strcpy(status_text,"- Binding Update was rejected - Not home subnet");
break;
case BA_ERR_ID_LEN:
strcpy(status_text,"- Binding Update was rejected - Incorrect interface identifier length");
break;
case BA_NO_HA:
strcpy(status_text,"- Binding Update was rejected - Not home agent for this mobile node");
break;
case BA_DUPL_ADDR:
strcpy(status_text,"- Binding Update was rejected - Duplicate Address Detection failed");
break;
default:
strcpy(status_text,"");
break;
}
if ((status>128)&&(strlen(status_text)==0))
strcpy(status_text,"- Binding Update was rejected");
proto_tree_add_uint_format(dstopt_tree, hf_ipv6_mipv6_status, tvb, offset+len,
IP6_MIPv6_STATUS_LENGTH, tvb_get_guint8(tvb,offset+len),
"Status: %u %s", tvb_get_guint8(tvb,offset+len), status_text);
len+=IP6_MIPv6_STATUS_LENGTH;
proto_tree_add_uint(dstopt_tree, hf_ipv6_mipv6_sequence_number, tvb, offset+len,
IP6_MIPv6_SEQUENCE_NUMBER_LENGTH, tvb_get_ntohs(tvb,offset+len));
len+=IP6_MIPv6_SEQUENCE_NUMBER_LENGTH;
if (tvb_get_ntohl(tvb,offset+len)==0xffffffff)
{
proto_tree_add_uint_format(dstopt_tree, hf_ipv6_mipv6_life_time, tvb, offset+len,
IP6_MIPv6_LIFE_TIME_LENGTH, tvb_get_ntohl(tvb,offset+len),
"Life Time: %u - Infinity", tvb_get_ntohl(tvb,offset+len));
} else
{
proto_tree_add_uint(dstopt_tree, hf_ipv6_mipv6_life_time, tvb, offset+len,
IP6_MIPv6_LIFE_TIME_LENGTH, tvb_get_ntohl(tvb,offset+len));
}
len+=IP6_MIPv6_LIFE_TIME_LENGTH;
proto_tree_add_uint(dstopt_tree, hf_ipv6_mipv6_refresh, tvb, offset+len,
IP6_MIPv6_REFRESH_LENGTH, tvb_get_ntohl(tvb,offset+len));
len+=IP6_MIPv6_REFRESH_LENGTH;
/* sub - options */
if (sub_options)
{
proto_tree_add_text(dstopt_tree, NullTVB, offset+len, 1, "Sub-Options");
}
return len;
}
static int
dissect_mipv6_bu(tvbuff_t *tvb, proto_tree *dstopt_tree, int offset) {
int len=0;
gboolean sub_options=FALSE;
proto_tree_add_uint_format(dstopt_tree, hf_ipv6_mipv6_type, tvb, offset,
IP6_MIPv6_OPTION_TYPE_LENGTH, tvb_get_guint8(tvb,offset),
"Option Type: %u (0x%02x) - Binding Update", tvb_get_guint8(tvb,offset),
tvb_get_guint8(tvb,offset));
len+=IP6_MIPv6_OPTION_TYPE_LENGTH;
if (tvb_get_guint8(tvb,offset+len)>8)
sub_options=TRUE;
proto_tree_add_uint(dstopt_tree, hf_ipv6_mipv6_length, tvb, offset+len,
IP6_MIPv6_OPTION_LENGTH_LENGTH, tvb_get_guint8(tvb,offset+len));
len+=IP6_MIPv6_OPTION_LENGTH_LENGTH;
proto_tree_add_boolean(dstopt_tree, hf_ipv6_mipv6_a_flag, tvb, offset+len,
IP6_MIPv6_FLAGS_LENGTH, tvb_get_guint8(tvb, offset+len));
proto_tree_add_boolean(dstopt_tree, hf_ipv6_mipv6_h_flag, tvb, offset+len,
IP6_MIPv6_FLAGS_LENGTH, tvb_get_guint8(tvb, offset+len));
proto_tree_add_boolean(dstopt_tree, hf_ipv6_mipv6_r_flag, tvb, offset+len,
IP6_MIPv6_FLAGS_LENGTH, tvb_get_guint8(tvb, offset+len));
proto_tree_add_boolean(dstopt_tree, hf_ipv6_mipv6_d_flag, tvb, offset+len,
IP6_MIPv6_FLAGS_LENGTH, tvb_get_guint8(tvb, offset+len));
proto_tree_add_boolean(dstopt_tree, hf_ipv6_mipv6_m_flag, tvb, offset+len,
IP6_MIPv6_FLAGS_LENGTH, tvb_get_guint8(tvb, offset+len));
proto_tree_add_boolean(dstopt_tree, hf_ipv6_mipv6_b_flag, tvb, offset+len,
IP6_MIPv6_FLAGS_LENGTH, tvb_get_guint8(tvb, offset+len));
len+=IP6_MIPv6_FLAGS_LENGTH;
proto_tree_add_uint(dstopt_tree, hf_ipv6_mipv6_prefix_length, tvb, offset+len,
IP6_MIPv6_PREFIX_LENGTH_LENGTH, tvb_get_guint8(tvb,offset+len));
len+=IP6_MIPv6_PREFIX_LENGTH_LENGTH;
proto_tree_add_uint(dstopt_tree, hf_ipv6_mipv6_sequence_number, tvb, offset+len,
IP6_MIPv6_SEQUENCE_NUMBER_LENGTH, tvb_get_ntohs(tvb,offset+len));
len+=IP6_MIPv6_SEQUENCE_NUMBER_LENGTH;
if (tvb_get_ntohl(tvb,offset+len)==0xffffffff)
{
proto_tree_add_uint_format(dstopt_tree, hf_ipv6_mipv6_life_time, tvb, offset+len,
IP6_MIPv6_LIFE_TIME_LENGTH, tvb_get_ntohl(tvb,offset+len),
"Life Time: %u - Infinity", tvb_get_ntohl(tvb,offset+len));
} else
{
proto_tree_add_uint(dstopt_tree, hf_ipv6_mipv6_life_time, tvb, offset+len,
IP6_MIPv6_LIFE_TIME_LENGTH, tvb_get_ntohl(tvb,offset+len));
}
len+=IP6_MIPv6_LIFE_TIME_LENGTH;
/* sub - options */
if (sub_options)
{
proto_tree_add_text(dstopt_tree, NullTVB, offset+len, 1, "Sub-Options");
}
return len;
}
static int
dissect_mipv6_ha(tvbuff_t *tvb, proto_tree *dstopt_tree, int offset) {
int len=0;
gboolean sub_options=FALSE;
proto_tree_add_uint_format(dstopt_tree, hf_ipv6_mipv6_type, tvb, offset+len,
IP6_MIPv6_OPTION_TYPE_LENGTH, tvb_get_guint8(tvb,offset+len),
"Option Type: %u (0x%02x) - Home Address", tvb_get_guint8(tvb,offset+len),
tvb_get_guint8(tvb,offset+len));
len+=IP6_MIPv6_OPTION_TYPE_LENGTH;
if (tvb_get_guint8(tvb,offset+len)>16)
sub_options=TRUE;
proto_tree_add_uint(dstopt_tree, hf_ipv6_mipv6_length, tvb, offset+len,
IP6_MIPv6_OPTION_LENGTH_LENGTH, tvb_get_guint8(tvb,offset+len));
len+=IP6_MIPv6_OPTION_LENGTH_LENGTH;
proto_tree_add_ipv6(dstopt_tree, hf_ipv6_mipv6_home_address, tvb, offset+len,
IP6_MIPv6_HOME_ADDRESS_LENGTH, tvb_get_ptr(tvb,offset+len,IP6_MIPv6_HOME_ADDRESS_LENGTH));
len+=IP6_MIPv6_HOME_ADDRESS_LENGTH;
/* sub - options */
if (sub_options)
{
proto_tree_add_text(dstopt_tree, NullTVB, offset+len, 1, "Sub-Options");
}
return len;
}
static int
dissect_mipv6_br(tvbuff_t *tvb, proto_tree *dstopt_tree, int offset) {
int len=0;
gboolean sub_options=FALSE;
proto_tree_add_uint_format(dstopt_tree, hf_ipv6_mipv6_type, tvb, offset+len,
IP6_MIPv6_OPTION_TYPE_LENGTH, tvb_get_guint8(tvb,offset+len),
"Option Type: %u (0x%02x) - Binding Request", tvb_get_guint8(tvb,offset+len),
tvb_get_guint8(tvb,offset+len));
len+=IP6_MIPv6_OPTION_TYPE_LENGTH;
if (tvb_get_guint8(tvb,offset+len)>0)
sub_options=TRUE;
proto_tree_add_uint(dstopt_tree, hf_ipv6_mipv6_length, tvb, offset+len,
IP6_MIPv6_OPTION_LENGTH_LENGTH, tvb_get_guint8(tvb,offset+len));
len+=IP6_MIPv6_OPTION_LENGTH_LENGTH;
/* sub - options */
if (sub_options)
{
proto_tree_add_text(dstopt_tree, NullTVB, offset+len, 1, "Sub-Options");
}
return len;
}
static int
dissect_mipv6_sub_u(tvbuff_t *tvb, proto_tree *dstopt_tree, int offset) {
int len=0;
proto_tree_add_uint_format(dstopt_tree, hf_ipv6_mipv6_sub_length, tvb, offset+len,
IP6_MIPv6_SUB_TYPE_LENGTH, tvb_get_guint8(tvb,offset+len),
"Sub-Option Type: %u (0x%02x) - Unique Identifier Sub-Option", tvb_get_guint8(tvb,offset+len),
tvb_get_guint8(tvb,offset+len));
len+=IP6_MIPv6_SUB_TYPE_LENGTH;
proto_tree_add_uint(dstopt_tree, hf_ipv6_mipv6_sub_length, tvb, offset+len,
IP6_MIPv6_SUB_LENGTH_LENGTH, tvb_get_guint8(tvb,offset+len));
len+=IP6_MIPv6_SUB_LENGTH_LENGTH;
proto_tree_add_uint(dstopt_tree, hf_ipv6_mipv6_sub_unique_ID, tvb, offset+len,
IP6_MIPv6_SUB_UNIQUE_ID_LENGTH, tvb_get_ntohs(tvb,offset+len));
len+=IP6_MIPv6_SUB_UNIQUE_ID_LENGTH;
return len;
}
static int
dissect_mipv6_sub_a_coa(tvbuff_t *tvb, proto_tree *dstopt_tree, int offset) {
int len=0;
proto_tree_add_uint_format(dstopt_tree, hf_ipv6_mipv6_sub_type, tvb, offset+len,
IP6_MIPv6_SUB_TYPE_LENGTH, tvb_get_guint8(tvb,offset+len),
"Sub-Option Type: %u (0x%02x) - Alternative Care Of Address", tvb_get_guint8(tvb,offset+len),
tvb_get_guint8(tvb,offset+len));
len+=IP6_MIPv6_SUB_TYPE_LENGTH;
proto_tree_add_uint(dstopt_tree, hf_ipv6_mipv6_sub_length, tvb, offset+len,
IP6_MIPv6_SUB_LENGTH_LENGTH, tvb_get_guint8(tvb,offset+len));
len+=IP6_MIPv6_SUB_LENGTH_LENGTH;
proto_tree_add_ipv6(dstopt_tree, hf_ipv6_mipv6_sub_alternative_COA, tvb, offset+len,
IP6_MIPv6_SUB_ALTERNATIVE_COA_LENGTH, tvb_get_ptr(tvb,offset+len,IP6_MIPv6_SUB_ALTERNATIVE_COA_LENGTH));
len+=IP6_MIPv6_SUB_ALTERNATIVE_COA_LENGTH;
return len;
}
/* BT INSERT END */
static int
dissect_opts(const u_char *pd, int offset, frame_data *fd, proto_tree *tree,
char *optname) {
struct ip6_ext ext;
int len;
proto_tree *dstopt_tree;
proto_item *ti;
u_char *p;
/* BT INSERT BEGIN */
tvbuff_t *tvb;
int mip_offset=0, delta=0;
/* BT INSERT END */
static const value_string rtalertvals[] = {
{ IP6OPT_RTALERT_MLD, "MLD" },
{ IP6OPT_RTALERT_RSVP, "RSVP" },
{ 0, NULL },
};
memcpy(&ext, (void *) &pd[offset], sizeof(ext));
len = (ext.ip6e_len + 1) << 3;
/* BT INSERT BEGIN */
tvb = tvb_create_from_top(offset);
/* BT INSERT END */
if (tree) {
/* !!! specify length */
ti = proto_tree_add_text(tree, NullTVB, offset, len,
"%s Header ", optname);
dstopt_tree = proto_item_add_subtree(ti, ett_ipv6);
proto_tree_add_text(dstopt_tree, NullTVB,
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, NullTVB,
offset + offsetof(struct ip6_ext, ip6e_len), 1,
"Length: %u (%d bytes)", ext.ip6e_len, len);
/* BT INSERT BEGIN */
mip_offset+=2;
/* BT INSERT END */
p = (u_char *)(pd + offset + 2);
while (p < pd + offset + len) {
switch (p[0]) {
case IP6OPT_PAD1:
proto_tree_add_text(dstopt_tree, NullTVB, p - pd, 1,
"Pad1");
p++;
/* BT INSERT BEGIN */
mip_offset++;
/* BT INSERT END */
break;
case IP6OPT_PADN:
proto_tree_add_text(dstopt_tree, NullTVB, p - pd, p[1] + 2,
"PadN: %u bytes", p[1] + 2);
p += p[1];
p += 2;
/* BT INSERT BEGIN */
mip_offset+=tvb_get_guint8(tvb,mip_offset+1)+2;
/* BT INSERT END */
break;
case IP6OPT_JUMBO:
if (p[1] == 4) {
proto_tree_add_text(dstopt_tree, NullTVB, p - pd, p[1] + 2,
"Jumbo payload: %u (%u bytes)",
pntohl(&p[2]), p[1] + 2);
} else {
proto_tree_add_text(dstopt_tree, NullTVB, p - pd, p[1] + 2,
"Jumbo payload: Invalid length (%u bytes)",
p[1] + 2);
}
p += p[1];
p += 2;
/* BT INSERT BEGIN */
mip_offset+=tvb_get_guint8(tvb,mip_offset+1)+2;
/* BT INSERT END */
break;
case IP6OPT_RTALERT:
{
char *rta;
if (p[1] == 2) {
rta = val_to_str(pntohs(&p[2]), rtalertvals,
"Unknown");
} else
rta = "Invalid length";
ti = proto_tree_add_text(dstopt_tree, NullTVB, p - pd, p[1] + 2,
"Router alert: %s (%u bytes)", rta, p[1] + 2);
p += p[1];
p += 2;
/* BT INSERT BEGIN */
mip_offset+=tvb_get_guint8(tvb,mip_offset+1)+2;
/* BT INSERT END */
break;
}
/* BT INSERT BEGIN */
case IP6OPT_BINDING_UPDATE :
{
delta=dissect_mipv6_bu(tvb, dstopt_tree, mip_offset);
p+=delta;
mip_offset+=delta;
break;
}
case IP6OPT_BINDING_ACK :
{
delta=dissect_mipv6_ba(tvb, dstopt_tree, mip_offset);
p+=delta;
mip_offset+=delta;
break;
}
case IP6OPT_HOME_ADDRESS :
{
delta=dissect_mipv6_ha(tvb, dstopt_tree, mip_offset);
p+=delta;
mip_offset+=delta;
break;
}
case IP6OPT_BINDING_REQUEST :
{
delta=dissect_mipv6_br(tvb, dstopt_tree, mip_offset);
p+=delta;
mip_offset+=delta;
break;
}
case IP6OPT_MIPv6_UNIQUE_ID_SUB :
{
delta=dissect_mipv6_sub_u(tvb, dstopt_tree, mip_offset);
p+=delta;
mip_offset+=delta;
break;
}
case IP6OPT_MIPv6_ALTERNATIVE_COA_SUB :
{
delta=dissect_mipv6_sub_a_coa(tvb, dstopt_tree, mip_offset);
p+=delta;
mip_offset+=delta;
break;
}
/* BT INSERT END */
default:
p = (u_char *)(pd + offset + len);
break;
}
}
/* decode... */
}
return len;
}
static int
dissect_hopopts(const u_char *pd, int offset, frame_data *fd, proto_tree *tree) {
return dissect_opts(pd, offset, fd, tree, "Hop-by-hop Option");
}
static int
dissect_dstopts(const u_char *pd, int offset, frame_data *fd, proto_tree *tree) {
return dissect_opts(pd, offset, fd, tree, "Destination Option");
}
void
dissect_ipv6(const u_char *pd, int offset, frame_data *fd, proto_tree *tree) {
proto_tree *ipv6_tree;
proto_item *ti;
guint8 nxt;
int advance;
int poffset;
int frag;
struct ip6_hdr ipv6;
OLD_CHECK_DISPLAY_AS_DATA(proto_ipv6, pd, offset, fd, tree);
memcpy(&ipv6, (void *) &pd[offset], sizeof(ipv6));
pi.ipproto = ipv6.ip6_nxt; /* XXX make work TCP follow (ipproto = 6) */
SET_ADDRESS(&pi.net_src, AT_IPv6, 16, &pd[offset + IP6H_SRC]);
SET_ADDRESS(&pi.src, AT_IPv6, 16, &pd[offset + IP6H_SRC]);
SET_ADDRESS(&pi.net_dst, AT_IPv6, 16, &pd[offset + IP6H_DST]);
SET_ADDRESS(&pi.dst, AT_IPv6, 16, &pd[offset + IP6H_DST]);
if (tree) {
/* !!! specify length */
ti = proto_tree_add_item(tree, proto_ipv6, NullTVB, offset, 40, FALSE);
ipv6_tree = proto_item_add_subtree(ti, ett_ipv6);
/* !!! warning: version also contains 4 Bit priority */
proto_tree_add_uint(ipv6_tree, hf_ipv6_version, NullTVB,
offset + offsetof(struct ip6_hdr, ip6_vfc), 1,
(ipv6.ip6_vfc >> 4) & 0x0f);
proto_tree_add_uint(ipv6_tree, hf_ipv6_class, NullTVB,
offset + offsetof(struct ip6_hdr, ip6_flow), 4,
(guint8)((ntohl(ipv6.ip6_flow) >> 20) & 0xff));
/*
* there should be no alignment problems for ip6_flow, since it's the first
* guint32 in the ipv6 struct
*/
proto_tree_add_uint_format(ipv6_tree, hf_ipv6_flow, NullTVB,
offset + offsetof(struct ip6_hdr, ip6_flow), 4,
(unsigned long)(ntohl(ipv6.ip6_flow) & IPV6_FLOWLABEL_MASK),
"Flowlabel: 0x%05lx",
(unsigned long)(ntohl(ipv6.ip6_flow) & IPV6_FLOWLABEL_MASK));
proto_tree_add_uint(ipv6_tree, hf_ipv6_plen, NullTVB,
offset + offsetof(struct ip6_hdr, ip6_plen), 2,
ntohs(ipv6.ip6_plen));
proto_tree_add_uint_format(ipv6_tree, hf_ipv6_nxt, NullTVB,
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_uint(ipv6_tree, hf_ipv6_hlim, NullTVB,
offset + offsetof(struct ip6_hdr, ip6_hlim), 1,
ipv6.ip6_hlim);
proto_tree_add_ipv6_hidden(ipv6_tree, hf_ipv6_addr, NullTVB,
offset + offsetof(struct ip6_hdr, ip6_src), 16,
ipv6.ip6_src.s6_addr8);
proto_tree_add_ipv6_hidden(ipv6_tree, hf_ipv6_addr, NullTVB,
offset + offsetof(struct ip6_hdr, ip6_dst), 16,
ipv6.ip6_dst.s6_addr8);
proto_tree_add_ipv6_format(ipv6_tree, hf_ipv6_src, NullTVB,
offset + offsetof(struct ip6_hdr, ip6_src), 16,
(guint8 *)&ipv6.ip6_src,
#ifdef INET6
"Source address: %s (%s)",
get_hostname6(&ipv6.ip6_src),
#else
"Source address: %s",
#endif
ip6_to_str(&ipv6.ip6_src));
proto_tree_add_ipv6_format(ipv6_tree, hf_ipv6_dst, NullTVB,
offset + offsetof(struct ip6_hdr, ip6_dst), 16,
(guint8 *)&ipv6.ip6_dst,
#ifdef INET6
"Destination address: %s (%s)",
get_hostname6(&ipv6.ip6_dst),
#else
"Destination address: %s",
#endif
ip6_to_str(&ipv6.ip6_dst));
}
/* start of the new header (could be a extension header) */
nxt = pd[poffset = offset + offsetof(struct ip6_hdr, ip6_nxt)];
offset += sizeof(struct ip6_hdr);
frag = 0;
/* start out assuming this insn't fragmented */
pi.fragmented = FALSE;
again:
switch (nxt) {
case IP_PROTO_HOPOPTS:
advance = dissect_hopopts(pd, offset, fd, tree);
nxt = pd[poffset = offset];
offset += advance;
goto again;
case IP_PROTO_ROUTING:
advance = dissect_routing6(pd, offset, fd, tree);
nxt = pd[poffset = offset];
offset += advance;
goto again;
case IP_PROTO_FRAGMENT:
pi.fragmented = TRUE;
advance = dissect_frag6(pd, offset, fd, tree, &frag);
nxt = pd[poffset = offset];
offset += advance;
goto again;
case IP_PROTO_AH:
advance = dissect_ah_old(pd, offset, fd, tree);
nxt = pd[poffset = offset];
offset += advance;
goto again;
case IP_PROTO_DSTOPTS:
advance = dissect_dstopts(pd, offset, fd, tree);
nxt = pd[poffset = offset];
offset += advance;
goto again;
}
#ifdef TEST_FINALHDR
proto_tree_add_uint_hidden(ipv6_tree, hf_ipv6_final, NullTVB, poffset, 1, nxt);
#endif
if (frag) {
/* fragmented */
if (check_col(fd, COL_PROTOCOL))
col_set_str(fd, COL_PROTOCOL, "IPv6");
/* COL_INFO was filled in by "dissect_frag6()" */
old_dissect_data(pd, offset, fd, tree);
} else {
/* do lookup with the subdissector table */
if (!old_dissector_try_port(ip_dissector_table, nxt, pd, offset, fd, tree)) {
/* Unknown protocol */
if (check_col(fd, COL_PROTOCOL))
col_set_str(fd, COL_PROTOCOL, "IPv6");
if (check_col(fd, COL_INFO))
col_add_fstr(fd, COL_INFO, "%s (0x%02x)", ipprotostr(nxt),nxt);
old_dissect_data(pd, offset, fd, tree);
}
}
}
static void
dissect_ipv6_none(const u_char *pd, int offset, frame_data *fd, proto_tree *tree) {
/* BT INSERT BEGIN */
if (hf_ipv6_mipv6_length!=-1) {
if (check_col(fd, COL_PROTOCOL))
col_set_str(fd, COL_PROTOCOL, "IPv6");
if (check_col(fd, COL_INFO))
col_add_fstr(fd, COL_INFO, "MobileIPv6 Destination Option");
} else {
/* BT INSERT END */
if (check_col(fd, COL_INFO))
col_add_fstr(fd, COL_INFO, "IPv6 no next header");
}
/* XXX - dissect the payload as padding? */
}
void
proto_register_ipv6(void)
{
static hf_register_info hf[] = {
{ &hf_ipv6_version,
{ "Version", "ipv6.version",
FT_UINT8, BASE_DEC, NULL, 0x0, "" }},
{ &hf_ipv6_class,
{ "Traffic class", "ipv6.class",
FT_UINT8, BASE_HEX, NULL, 0x0, "" }},
{ &hf_ipv6_flow,
{ "Flowlabel", "ipv6.flow",
FT_UINT32, BASE_HEX, NULL, 0x0, "" }},
{ &hf_ipv6_plen,
{ "Payload length", "ipv6.plen",
FT_UINT16, BASE_DEC, NULL, 0x0, "" }},
{ &hf_ipv6_nxt,
{ "Next header", "ipv6.nxt",
FT_UINT8, BASE_HEX, NULL, 0x0, "" }},
{ &hf_ipv6_hlim,
{ "Hop limit", "ipv6.hlim",
FT_UINT8, BASE_DEC, NULL, 0x0, "" }},
{ &hf_ipv6_src,
{ "Source", "ipv6.src",
FT_IPv6, BASE_NONE, NULL, 0x0,
"Source IPv6 Address" }},
{ &hf_ipv6_dst,
{ "Destination", "ipv6.dst",
FT_IPv6, BASE_NONE, NULL, 0x0,
"Destination IPv6 Address" }},
{ &hf_ipv6_addr,
{ "Address", "ipv6.addr",
FT_IPv6, BASE_NONE, NULL, 0x0,
"Source or Destination IPv6 Address" }},
/* BT INSERT BEGIN */
{ &hf_ipv6_mipv6_type,
{ "Option Type ", "ipv6.mipv6_type",
FT_UINT8, BASE_DEC, NULL, 0x0,
"" }},
{ &hf_ipv6_mipv6_length,
{ "Option Length ", "ipv6.mipv6_length",
FT_UINT8, BASE_DEC, NULL, 0x0,
"" }},
{ &hf_ipv6_mipv6_a_flag,
{ "Acknowledge (A) ", "ipv6.mipv6_a_flag",
FT_BOOLEAN, 8, TFS(&ipv6_mipv6_bu_a_flag_value),
IP6_MIPv6_BU_A_FLAG,
"" }},
{ &hf_ipv6_mipv6_h_flag,
{ "Home Registration (H) ", "ipv6.mipv6_h_flag",
FT_BOOLEAN, 8, TFS(&ipv6_mipv6_bu_h_flag_value),
IP6_MIPv6_BU_H_FLAG,
"" }},
{ &hf_ipv6_mipv6_r_flag,
{ "Router (R) ", "ipv6.mipv6_r_flag",
FT_BOOLEAN, 8, TFS(&ipv6_mipv6_bu_r_flag_value),
IP6_MIPv6_BU_R_FLAG,
"" }},
{ &hf_ipv6_mipv6_d_flag,
{ "Duplicate Address Detection (D) ", "ipv6.mipv6_d_flag",
FT_BOOLEAN, 8, TFS(&ipv6_mipv6_bu_d_flag_value),
IP6_MIPv6_BU_D_FLAG,
"" }},
{ &hf_ipv6_mipv6_m_flag,
{ "MAP Registration (M) ", "ipv6.mipv6_m_flag",
FT_BOOLEAN, 8, TFS(&ipv6_mipv6_bu_m_flag_value),
IP6_MIPv6_BU_M_FLAG,
"" }},
{ &hf_ipv6_mipv6_b_flag,
{ "Bicasting all (B) ", "ipv6.mipv6_b_flag",
FT_BOOLEAN, 8, TFS(&ipv6_mipv6_bu_b_flag_value),
IP6_MIPv6_BU_B_FLAG,
"" }},
{ &hf_ipv6_mipv6_prefix_length,
{ "Prefix Length ", "ipv6.mipv6_prefix_length",
FT_UINT8, BASE_DEC, NULL, 0x0,
"" }},
{ &hf_ipv6_mipv6_sequence_number,
{ "Sequence Number ", "ipv6.mipv6_sequence_number",
FT_UINT16, BASE_DEC, NULL, 0x0,
"" }},
{ &hf_ipv6_mipv6_life_time,
{ "Life Time ", "ipv6.mipv6_life_time",
FT_UINT32, BASE_DEC, NULL, 0x0,
"" }},
{ &hf_ipv6_mipv6_status,
{ "Status ", "ipv6.mipv6_status",
FT_UINT8, BASE_DEC, NULL, 0x0,
"" }},
{ &hf_ipv6_mipv6_refresh,
{ "Refresh ", "ipv6.mipv6_refresh",
FT_UINT32, BASE_DEC, NULL, 0x0,
"" }},
{ &hf_ipv6_mipv6_home_address,
{ "Home Address ", "ipv6.mipv6_home_address",
FT_IPv6, BASE_HEX, NULL, 0x0,
"" }},
{ &hf_ipv6_mipv6_sub_type,
{ "Sub-Option Type ", "ipv6.mipv6_sub_type",
FT_UINT8, BASE_NONE, NULL, 0x0,
"" }},
{ &hf_ipv6_mipv6_sub_length,
{ "Sub-Option Length ", "ipv6.mipv6_sub_length",
FT_UINT8, BASE_NONE, NULL, 0x0,
"" }},
{ &hf_ipv6_mipv6_sub_unique_ID,
{ "Unique Identifier ", "ipv6.mipv6_sub_unique_ID",
FT_UINT16, BASE_NONE, NULL, 0x0,
"" }},
{ &hf_ipv6_mipv6_sub_alternative_COA,
{ "Alternative Care of Address ", "ipv6.mipv6_sub_alternative_COA",
FT_IPv6, BASE_HEX, NULL, 0x0,
"" }},
/* BT INSERT END */
#ifdef TEST_FINALHDR
{ &hf_ipv6_final,
{ "Final next header", "ipv6.final",
FT_UINT8, BASE_HEX, NULL, 0x0, "" }},
#endif
};
static gint *ett[] = {
&ett_ipv6,
};
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));
}
void
proto_reg_handoff_ipv6(void)
{
old_dissector_add("ethertype", ETHERTYPE_IPv6, dissect_ipv6, proto_ipv6);
old_dissector_add("ppp.protocol", PPP_IPV6, dissect_ipv6, proto_ipv6);
old_dissector_add("ip.proto", IP_PROTO_IPV6, dissect_ipv6, proto_ipv6);
old_dissector_add("null.type", BSD_AF_INET6_BSD, dissect_ipv6, proto_ipv6);
old_dissector_add("null.type", BSD_AF_INET6_FREEBSD, dissect_ipv6, proto_ipv6);
old_dissector_add("ip.proto", IP_PROTO_NONE, dissect_ipv6_none, proto_ipv6);
}
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