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wireshark/epan/dissectors/packet-aodv.c

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/* packet-aodv.c
* Routines for AODV dissection
* Copyright 2000, Erik Nordstrom <erik.nordstrom@it.uu.se>
*
* $Id$
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* 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_STDDEF_H
#include <stddef.h>
#endif
#include <glib.h>
#include <epan/packet.h>
#ifndef offsetof
#define offsetof(type, member) ((size_t)(&((type *)0)->member))
#endif
/*
* See
*
* RFC 3561 (which indicates that, for IPv6, the only change is that
* the address fields are enlarged)
*
* http://www.cs.ucsb.edu/~ebelding/txt/aodv6.txt
*
* http://www.tcs.hut.fi/~anttit/manet/drafts/draft-perkins-aodv6-01.txt
*
* (both of the above two are draft-perkins-manet-aodv6-01.txt, which
* is from November 2000)
*/
#define INET6_ADDRLEN 16
#define UDP_PORT_AODV 654
/* Message Types */
#define RREQ 1
#define RREP 2
#define RERR 3
#define RREP_ACK 4
#define DRAFT_01_V6_RREQ 16
#define DRAFT_01_V6_RREP 17
#define DRAFT_01_V6_RERR 18
#define DRAFT_01_V6_RREP_ACK 19
/* Extension Types */
#define AODV_EXT 1
#define AODV_EXT_INT 2
#define AODV_EXT_NTP 3
/* Flag bits: */
#define RREQ_UNKNSEQ 0x08
#define RREQ_DESTONLY 0x10
#define RREQ_GRATRREP 0x20
#define RREQ_REP 0x40
#define RREQ_JOIN 0x80
#define RREP_ACK_REQ 0x40
#define RREP_REP 0x80
#define RERR_NODEL 0x80
static const value_string type_vals[] = {
{ RREQ, "Route Request" },
{ RREP, "Route Reply" },
{ RERR, "Route Error" },
{ RREP_ACK, "Route Reply Acknowledgment"},
{ DRAFT_01_V6_RREQ, "draft-perkins-manet-aodv6-01 IPv6 Route Request"},
{ DRAFT_01_V6_RREP, "draft-perkins-manet-aodv6-01 IPv6 Route Reply"},
{ DRAFT_01_V6_RERR, "draft-perkins-manet-aodv6-01 IPv6 Route Error"},
{ DRAFT_01_V6_RREP_ACK, "draft-perkins-manet-aodv6-01 IPv6 Route Reply Acknowledgment"},
{ 0, NULL }
};
static const value_string exttype_vals[] = {
{ AODV_EXT, "None"},
{ AODV_EXT_INT, "Hello Interval"},
{ AODV_EXT_NTP, "Timestamp"},
{ 0, NULL}
};
typedef struct v6_ext {
guint8 type;
guint8 length;
} aodv_ext_t;
/* Initialize the protocol and registered fields */
static int proto_aodv = -1;
static int hf_aodv_type = -1;
static int hf_aodv_flags = -1;
static int hf_aodv_prefix_sz = -1;
static int hf_aodv_hopcount = -1;
static int hf_aodv_rreq_id = -1;
static int hf_aodv_dest_ip = -1;
static int hf_aodv_dest_ipv6 = -1;
static int hf_aodv_dest_seqno = -1;
static int hf_aodv_orig_ip = -1;
static int hf_aodv_orig_ipv6 = -1;
static int hf_aodv_orig_seqno = -1;
static int hf_aodv_lifetime = -1;
static int hf_aodv_destcount = -1;
static int hf_aodv_unreach_dest_ip = -1;
static int hf_aodv_unreach_dest_ipv6 = -1;
static int hf_aodv_unreach_dest_seqno = -1;
static int hf_aodv_flags_rreq_join = -1;
static int hf_aodv_flags_rreq_repair = -1;
static int hf_aodv_flags_rreq_gratuitous = -1;
static int hf_aodv_flags_rreq_destinationonly = -1;
static int hf_aodv_flags_rreq_unknown = -1;
static int hf_aodv_flags_rrep_repair = -1;
static int hf_aodv_flags_rrep_ack = -1;
static int hf_aodv_flags_rerr_nodelete = -1;
static int hf_aodv_ext_type = -1;
static int hf_aodv_ext_length = -1;
static int hf_aodv_ext_interval = -1;
static int hf_aodv_ext_timestamp = -1;
/* Initialize the subtree pointers */
static gint ett_aodv = -1;
static gint ett_aodv_flags = -1;
static gint ett_aodv_unreach_dest = -1;
static gint ett_aodv_extensions = -1;
/* Code to actually dissect the packets */
static void
dissect_aodv_ext(tvbuff_t * tvb, int offset, proto_tree * tree)
{
proto_tree *ext_tree;
proto_item *ti;
guint8 type, len;
if (!tree)
return;
again:
if ((int) tvb_reported_length(tvb) <= offset)
return; /* No more options left */
type = tvb_get_guint8(tvb, offset);
len = tvb_get_guint8(tvb, offset + 1);
ti = proto_tree_add_text(tree, tvb, offset, 2 + len, "Extensions");
ext_tree = proto_item_add_subtree(ti, ett_aodv_extensions);
proto_tree_add_text(ext_tree, tvb, offset, 1,
"Type: %u (%s)", type,
val_to_str(type, exttype_vals, "Unknown"));
if (len == 0) {
proto_tree_add_text(ext_tree, tvb, offset + 1, 1,
"Invalid option length: %u", len);
return; /* we must not try to decode this */
}
proto_tree_add_text(ext_tree, tvb, offset + 1, 1,
"Length: %u bytes", len);
offset += 2;
switch (type) {
case AODV_EXT_INT:
proto_tree_add_uint(ext_tree, hf_aodv_ext_interval,
tvb, offset, 4, tvb_get_ntohl(tvb, offset));
break;
case AODV_EXT_NTP:
proto_tree_add_item(ext_tree, hf_aodv_ext_timestamp,
tvb, offset, 8, FALSE);
break;
default:
break;
}
/* If multifield extensions appear, we need more
* sophisticated handler. For now, this is okay. */
offset += len;
goto again;
}
static void
dissect_aodv_rreq(tvbuff_t *tvb, packet_info *pinfo, proto_tree *aodv_tree,
proto_item *ti, gboolean is_ipv6)
{
int offset = 1;
proto_item *tj;
proto_tree *aodv_flags_tree;
guint8 flags;
guint8 hop_count;
guint32 rreq_id;
guint32 dest_addr_v4;
struct e_in6_addr dest_addr_v6;
guint32 dest_seqno;
guint32 orig_addr_v4;
struct e_in6_addr orig_addr_v6;
guint32 orig_seqno;
int extlen;
flags = tvb_get_guint8(tvb, offset);
if (aodv_tree) {
tj = proto_tree_add_text(aodv_tree, tvb, offset, 1, "Flags:");
aodv_flags_tree = proto_item_add_subtree(tj, ett_aodv_flags);
proto_tree_add_boolean(aodv_flags_tree, hf_aodv_flags_rreq_join,
tvb, offset, 1, flags);
proto_tree_add_boolean(aodv_flags_tree, hf_aodv_flags_rreq_repair,
tvb, offset, 1, flags);
proto_tree_add_boolean(aodv_flags_tree, hf_aodv_flags_rreq_gratuitous,
tvb, offset, 1, flags);
proto_tree_add_boolean(aodv_flags_tree, hf_aodv_flags_rreq_destinationonly,
tvb, offset, 1, flags);
proto_tree_add_boolean(aodv_flags_tree, hf_aodv_flags_rreq_unknown,
tvb, offset, 1, flags);
if (flags & RREQ_JOIN)
proto_item_append_text(tj, " J");
if (flags & RREQ_REP)
proto_item_append_text(tj, " R");
if (flags & RREQ_GRATRREP)
proto_item_append_text(tj, " G");
if (flags & RREQ_DESTONLY)
proto_item_append_text(tj, " D");
if (flags & RREQ_UNKNSEQ)
proto_item_append_text(tj, " U");
}
offset += 2; /* skip reserved byte */
hop_count = tvb_get_guint8(tvb, offset);
if (aodv_tree)
proto_tree_add_uint(aodv_tree, hf_aodv_hopcount, tvb, offset, 1,
hop_count);
offset += 1;
rreq_id = tvb_get_ntohl(tvb, offset);
if (aodv_tree)
proto_tree_add_uint(aodv_tree, hf_aodv_rreq_id, tvb, offset, 4,
rreq_id);
offset += 4;
if (is_ipv6) {
tvb_get_ipv6(tvb, offset, &dest_addr_v6);
if (aodv_tree) {
proto_tree_add_ipv6(aodv_tree, hf_aodv_dest_ipv6, tvb, offset,
INET6_ADDRLEN, (guint8 *)&dest_addr_v6);
proto_item_append_text(ti, ", Dest IP: %s",
ip6_to_str(&dest_addr_v6));
}
if (check_col(pinfo->cinfo, COL_INFO))
col_append_fstr(pinfo->cinfo, COL_INFO, ", D: %s",
ip6_to_str(&dest_addr_v6));
offset += INET6_ADDRLEN;
} else {
dest_addr_v4 = tvb_get_ipv4(tvb, offset);
if (aodv_tree) {
proto_tree_add_ipv4(aodv_tree, hf_aodv_dest_ip, tvb, offset, 4,
dest_addr_v4);
proto_item_append_text(ti, ", Dest IP: %s",
ip_to_str((guint8 *)&dest_addr_v4));
}
if (check_col(pinfo->cinfo, COL_INFO))
col_append_fstr(pinfo->cinfo, COL_INFO, ", D: %s",
ip_to_str((guint8 *)&dest_addr_v4));
offset += 4;
}
dest_seqno = tvb_get_ntohl(tvb, offset);
if (aodv_tree)
proto_tree_add_uint(aodv_tree, hf_aodv_dest_seqno, tvb, offset, 4,
dest_seqno);
offset += 4;
if (is_ipv6) {
tvb_get_ipv6(tvb, offset, &orig_addr_v6);
if (aodv_tree) {
proto_tree_add_ipv6(aodv_tree, hf_aodv_orig_ipv6, tvb, offset,
INET6_ADDRLEN, (guint8 *)&orig_addr_v6);
proto_item_append_text(ti, ", Orig IP: %s",
ip6_to_str(&orig_addr_v6));
}
if (check_col(pinfo->cinfo, COL_INFO))
col_append_fstr(pinfo->cinfo, COL_INFO, ", O: %s",
ip6_to_str(&orig_addr_v6));
offset += INET6_ADDRLEN;
} else {
orig_addr_v4 = tvb_get_ipv4(tvb, offset);
if (aodv_tree) {
proto_tree_add_ipv4(aodv_tree, hf_aodv_orig_ip, tvb, offset, 4,
orig_addr_v4);
proto_item_append_text(ti, ", Orig IP: %s",
ip_to_str((guint8 *)&orig_addr_v4));
}
if (check_col(pinfo->cinfo, COL_INFO))
col_append_fstr(pinfo->cinfo, COL_INFO, ", O: %s",
ip_to_str((guint8 *)&orig_addr_v4));
offset += 4;
}
orig_seqno = tvb_get_ntohl(tvb, offset);
if (aodv_tree)
proto_tree_add_uint(aodv_tree, hf_aodv_orig_seqno, tvb, offset, 4,
orig_seqno);
if (check_col(pinfo->cinfo, COL_INFO))
col_append_fstr(pinfo->cinfo, COL_INFO, " Id=%u Hcnt=%u DSN=%u OSN=%u",
rreq_id,
hop_count,
dest_seqno,
orig_seqno);
offset += 4;
if (aodv_tree) {
extlen = tvb_reported_length_remaining(tvb, offset);
if (extlen > 0)
dissect_aodv_ext(tvb, offset, aodv_tree);
}
}
static void
dissect_aodv_rrep(tvbuff_t *tvb, packet_info *pinfo, proto_tree *aodv_tree,
proto_item *ti, gboolean is_ipv6)
{
int offset = 1;
proto_item *tj;
proto_tree *aodv_flags_tree;
guint8 flags;
guint8 prefix_sz;
guint8 hop_count;
guint32 dest_addr_v4;
struct e_in6_addr dest_addr_v6;
guint32 dest_seqno;
guint32 orig_addr_v4;
struct e_in6_addr orig_addr_v6;
guint32 lifetime;
int extlen;
flags = tvb_get_guint8(tvb, offset);
if (aodv_tree) {
tj = proto_tree_add_text(aodv_tree, tvb, offset, 1, "Flags:");
aodv_flags_tree = proto_item_add_subtree(tj, ett_aodv_flags);
proto_tree_add_boolean(aodv_flags_tree, hf_aodv_flags_rrep_repair,
tvb, offset, 1, flags);
proto_tree_add_boolean(aodv_flags_tree, hf_aodv_flags_rrep_ack, tvb,
offset, 1, flags);
if (flags & RREP_REP)
proto_item_append_text(tj, " R");
if (flags & RREP_ACK_REQ)
proto_item_append_text(tj, " A");
}
offset += 1;
prefix_sz = tvb_get_guint8(tvb, offset) & 0x1F;
if (aodv_tree)
proto_tree_add_uint(aodv_tree, hf_aodv_prefix_sz, tvb, offset, 1,
prefix_sz);
offset += 1;
hop_count = tvb_get_guint8(tvb, offset);
if (aodv_tree)
proto_tree_add_uint(aodv_tree, hf_aodv_hopcount, tvb, offset, 1,
hop_count);
offset += 1;
if (is_ipv6) {
tvb_get_ipv6(tvb, offset, &dest_addr_v6);
if (aodv_tree) {
proto_tree_add_ipv6(aodv_tree, hf_aodv_dest_ipv6, tvb, offset,
INET6_ADDRLEN, (guint8 *)&dest_addr_v6);
proto_item_append_text(ti, ", Dest IP: %s",
ip6_to_str(&dest_addr_v6));
}
if (check_col(pinfo->cinfo, COL_INFO))
col_append_fstr(pinfo->cinfo, COL_INFO, ", D: %s",
ip6_to_str(&dest_addr_v6));
offset += INET6_ADDRLEN;
} else {
dest_addr_v4 = tvb_get_ipv4(tvb, offset);
if (aodv_tree) {
proto_tree_add_ipv4(aodv_tree, hf_aodv_dest_ip, tvb, offset, 4,
dest_addr_v4);
proto_item_append_text(ti, ", Dest IP: %s",
ip_to_str((guint8 *)&dest_addr_v4));
}
if (check_col(pinfo->cinfo, COL_INFO))
col_append_fstr(pinfo->cinfo, COL_INFO, ", D: %s",
ip_to_str((guint8 *)&dest_addr_v4));
offset += 4;
}
dest_seqno = tvb_get_ntohl(tvb, offset);
if (aodv_tree)
proto_tree_add_uint(aodv_tree, hf_aodv_dest_seqno, tvb, offset, 4,
dest_seqno);
offset += 4;
if (is_ipv6) {
tvb_get_ipv6(tvb, offset, &orig_addr_v6);
if (aodv_tree) {
proto_tree_add_ipv6(aodv_tree, hf_aodv_orig_ipv6, tvb, offset,
INET6_ADDRLEN, (guint8 *)&orig_addr_v6);
proto_item_append_text(ti, ", Orig IP: %s",
ip6_to_str(&orig_addr_v6));
}
if (check_col(pinfo->cinfo, COL_INFO))
col_append_fstr(pinfo->cinfo, COL_INFO, ", O: %s",
ip6_to_str(&orig_addr_v6));
offset += INET6_ADDRLEN;
} else {
orig_addr_v4 = tvb_get_ipv4(tvb, offset);
if (aodv_tree) {
proto_tree_add_ipv4(aodv_tree, hf_aodv_orig_ip, tvb, offset, 4,
orig_addr_v4);
proto_item_append_text(ti, ", Orig IP: %s",
ip_to_str((guint8 *)&orig_addr_v4));
}
if (check_col(pinfo->cinfo, COL_INFO))
col_append_fstr(pinfo->cinfo, COL_INFO, ", O: %s",
ip_to_str((guint8 *)&orig_addr_v4));
offset += 4;
}
lifetime = tvb_get_ntohl(tvb, offset);
if (aodv_tree) {
proto_tree_add_uint(aodv_tree, hf_aodv_lifetime, tvb, offset, 4,
lifetime);
proto_item_append_text(ti, ", Lifetime=%u", lifetime);
}
if (check_col(pinfo->cinfo, COL_INFO))
col_append_fstr(pinfo->cinfo, COL_INFO, " Hcnt=%u DSN=%u Lifetime=%u",
hop_count,
dest_seqno,
lifetime);
offset += 4;
if (aodv_tree) {
extlen = tvb_reported_length_remaining(tvb, offset);
if (extlen > 0)
dissect_aodv_ext(tvb, offset, aodv_tree);
}
}
static void
dissect_aodv_rerr(tvbuff_t *tvb, packet_info *pinfo, proto_tree *aodv_tree,
gboolean is_ipv6)
{
int offset = 1;
proto_item *tj;
proto_tree *aodv_flags_tree;
proto_tree *aodv_unreach_dest_tree;
guint8 flags;
guint8 dest_count;
int i;
flags = tvb_get_guint8(tvb, offset);
if (aodv_tree) {
tj = proto_tree_add_text(aodv_tree, tvb, offset, 1, "Flags:");
aodv_flags_tree = proto_item_add_subtree(tj, ett_aodv_flags);
proto_tree_add_boolean(aodv_flags_tree, hf_aodv_flags_rerr_nodelete,
tvb, offset, 1, flags);
if (flags & RERR_NODEL)
proto_item_append_text(tj, " N");
}
offset += 2; /* skip reserved byte */
dest_count = tvb_get_guint8(tvb, offset);
if (aodv_tree)
proto_tree_add_uint(aodv_tree, hf_aodv_destcount, tvb, offset, 1,
dest_count);
if (check_col(pinfo->cinfo, COL_INFO))
col_append_fstr(pinfo->cinfo, COL_INFO, ", Dest Count=%u",
dest_count);
offset += 1;
if (is_ipv6) {
tj = proto_tree_add_text(aodv_tree, tvb, offset,
(INET6_ADDRLEN + 4)*dest_count,
"Unreachable Destinations");
aodv_unreach_dest_tree = proto_item_add_subtree(tj, ett_aodv_unreach_dest);
for (i = 0; i < dest_count; i++) {
proto_tree_add_item(aodv_unreach_dest_tree,
hf_aodv_unreach_dest_ipv6,
tvb, offset, INET6_ADDRLEN, FALSE);
offset += INET6_ADDRLEN;
proto_tree_add_item(aodv_unreach_dest_tree, hf_aodv_dest_seqno,
tvb, offset, 4, FALSE);
offset += 4;
}
} else {
tj = proto_tree_add_text(aodv_tree, tvb, offset, (4 + 4)*dest_count,
"Unreachable Destinations");
aodv_unreach_dest_tree = proto_item_add_subtree(tj, ett_aodv_unreach_dest);
for (i = 0; i < dest_count; i++) {
proto_tree_add_item(aodv_unreach_dest_tree, hf_aodv_unreach_dest_ip,
tvb, offset, 4, FALSE);
offset += 4;
proto_tree_add_item(aodv_unreach_dest_tree, hf_aodv_dest_seqno,
tvb, offset, 4, FALSE);
offset += 4;
}
}
}
static void
dissect_aodv_draft_01_v6_rreq(tvbuff_t *tvb, packet_info *pinfo,
proto_tree *aodv_tree, proto_item *ti)
{
int offset = 1;
proto_item *tj;
proto_tree *aodv_flags_tree;
guint8 flags;
guint8 hop_count;
guint32 rreq_id;
guint32 dest_seqno;
guint32 orig_seqno;
struct e_in6_addr dest_addr_v6;
struct e_in6_addr orig_addr_v6;
int extlen;
flags = tvb_get_guint8(tvb, offset);
if (aodv_tree) {
tj = proto_tree_add_text(aodv_tree, tvb, offset, 1, "Flags:");
aodv_flags_tree = proto_item_add_subtree(tj, ett_aodv_flags);
proto_tree_add_boolean(aodv_flags_tree, hf_aodv_flags_rreq_join,
tvb, offset, 1, flags);
proto_tree_add_boolean(aodv_flags_tree, hf_aodv_flags_rreq_repair,
tvb, offset, 1, flags);
proto_tree_add_boolean(aodv_flags_tree, hf_aodv_flags_rreq_gratuitous,
tvb, offset, 1, flags);
proto_tree_add_boolean(aodv_flags_tree, hf_aodv_flags_rreq_destinationonly,
tvb, offset, 1, flags);
proto_tree_add_boolean(aodv_flags_tree, hf_aodv_flags_rreq_unknown,
tvb, offset, 1, flags);
if (flags & RREQ_JOIN)
proto_item_append_text(tj, " J");
if (flags & RREQ_REP)
proto_item_append_text(tj, " R");
if (flags & RREQ_GRATRREP)
proto_item_append_text(tj, " G");
if (flags & RREQ_DESTONLY)
proto_item_append_text(tj, " D");
if (flags & RREQ_UNKNSEQ)
proto_item_append_text(tj, " U");
}
offset += 2; /* skip reserved byte */
hop_count = tvb_get_guint8(tvb, offset);
if (aodv_tree)
proto_tree_add_uint(aodv_tree, hf_aodv_hopcount, tvb, offset, 1,
hop_count);
offset += 1;
rreq_id = tvb_get_ntohl(tvb, offset);
if (aodv_tree)
proto_tree_add_uint(aodv_tree, hf_aodv_rreq_id, tvb, offset, 4,
rreq_id);
offset += 4;
dest_seqno = tvb_get_ntohl(tvb, offset);
if (aodv_tree)
proto_tree_add_uint(aodv_tree, hf_aodv_dest_seqno, tvb, offset, 4,
dest_seqno);
offset += 4;
orig_seqno = tvb_get_ntohl(tvb, offset);
if (aodv_tree)
proto_tree_add_uint(aodv_tree, hf_aodv_orig_seqno, tvb, offset, 4,
orig_seqno);
offset += 4;
tvb_get_ipv6(tvb, offset, &dest_addr_v6);
if (aodv_tree) {
proto_tree_add_ipv6(aodv_tree, hf_aodv_dest_ipv6, tvb, offset,
INET6_ADDRLEN, (guint8 *)&dest_addr_v6);
proto_item_append_text(ti, ", Dest IP: %s",
ip6_to_str(&dest_addr_v6));
}
if (check_col(pinfo->cinfo, COL_INFO))
col_append_fstr(pinfo->cinfo, COL_INFO, ", D: %s",
ip6_to_str(&dest_addr_v6));
offset += INET6_ADDRLEN;
tvb_get_ipv6(tvb, offset, &orig_addr_v6);
if (aodv_tree) {
proto_tree_add_ipv6(aodv_tree, hf_aodv_orig_ipv6, tvb, offset,
INET6_ADDRLEN, (guint8 *)&orig_addr_v6);
proto_item_append_text(ti, ", Orig IP: %s",
ip6_to_str(&orig_addr_v6));
}
if (check_col(pinfo->cinfo, COL_INFO))
col_append_fstr(pinfo->cinfo, COL_INFO,
", O: %s Id=%u Hcnt=%u DSN=%u OSN=%u",
ip6_to_str(&orig_addr_v6),
rreq_id,
hop_count,
dest_seqno,
orig_seqno);
offset += INET6_ADDRLEN;
if (aodv_tree) {
extlen = tvb_reported_length_remaining(tvb, offset);
if (extlen > 0)
dissect_aodv_ext(tvb, offset, aodv_tree);
}
}
static void
dissect_aodv_draft_01_v6_rrep(tvbuff_t *tvb, packet_info *pinfo,
proto_tree *aodv_tree, proto_item *ti)
{
int offset = 1;
proto_item *tj;
proto_tree *aodv_flags_tree;
guint8 flags;
guint8 prefix_sz;
guint8 hop_count;
guint32 dest_seqno;
struct e_in6_addr dest_addr_v6;
struct e_in6_addr orig_addr_v6;
guint32 lifetime;
int extlen;
flags = tvb_get_guint8(tvb, offset);
if (aodv_tree) {
tj = proto_tree_add_text(aodv_tree, tvb, offset, 1, "Flags:");
aodv_flags_tree = proto_item_add_subtree(tj, ett_aodv_flags);
proto_tree_add_boolean(aodv_flags_tree, hf_aodv_flags_rrep_repair,
tvb, offset, 1, flags);
proto_tree_add_boolean(aodv_flags_tree, hf_aodv_flags_rrep_ack, tvb,
offset, 1, flags);
if (flags & RREP_REP)
proto_item_append_text(tj, " R");
if (flags & RREP_ACK_REQ)
proto_item_append_text(tj, " A");
}
offset += 1;
prefix_sz = tvb_get_guint8(tvb, offset) & 0x7F;
if (aodv_tree)
proto_tree_add_uint(aodv_tree, hf_aodv_prefix_sz, tvb, offset, 1,
prefix_sz);
offset += 1;
hop_count = tvb_get_guint8(tvb, offset);
if (aodv_tree)
proto_tree_add_uint(aodv_tree, hf_aodv_hopcount, tvb, offset, 1,
hop_count);
offset += 1;
dest_seqno = tvb_get_ntohl(tvb, offset);
if (aodv_tree)
proto_tree_add_uint(aodv_tree, hf_aodv_dest_seqno, tvb, offset, 4,
dest_seqno);
offset += 4;
tvb_get_ipv6(tvb, offset, &dest_addr_v6);
if (aodv_tree) {
proto_tree_add_ipv6(aodv_tree, hf_aodv_dest_ipv6, tvb, offset,
INET6_ADDRLEN, (guint8 *)&dest_addr_v6);
proto_item_append_text(ti, ", Dest IP: %s",
ip6_to_str(&dest_addr_v6));
}
if (check_col(pinfo->cinfo, COL_INFO))
col_append_fstr(pinfo->cinfo, COL_INFO, ", D: %s",
ip6_to_str(&dest_addr_v6));
offset += INET6_ADDRLEN;
tvb_get_ipv6(tvb, offset, &orig_addr_v6);
if (aodv_tree) {
proto_tree_add_ipv6(aodv_tree, hf_aodv_orig_ipv6, tvb, offset,
INET6_ADDRLEN, (guint8 *)&orig_addr_v6);
proto_item_append_text(ti, ", Orig IP: %s",
ip6_to_str(&orig_addr_v6));
}
if (check_col(pinfo->cinfo, COL_INFO))
col_append_fstr(pinfo->cinfo, COL_INFO, ", O: %s",
ip6_to_str(&orig_addr_v6));
offset += INET6_ADDRLEN;
lifetime = tvb_get_ntohl(tvb, offset);
if (aodv_tree) {
proto_tree_add_uint(aodv_tree, hf_aodv_lifetime, tvb, offset, 4,
lifetime);
proto_item_append_text(ti, ", Lifetime=%u", lifetime);
}
if (check_col(pinfo->cinfo, COL_INFO))
col_append_fstr(pinfo->cinfo, COL_INFO, " Hcnt=%u DSN=%u Lifetime=%u",
hop_count,
dest_seqno,
lifetime);
offset += 4;
if (aodv_tree) {
extlen = tvb_reported_length_remaining(tvb, offset);
if (extlen > 0)
dissect_aodv_ext(tvb, offset, aodv_tree);
}
}
static void
dissect_aodv_draft_01_v6_rerr(tvbuff_t *tvb, packet_info *pinfo,
proto_tree *aodv_tree)
{
int offset = 1;
proto_item *tj;
proto_tree *aodv_flags_tree;
proto_tree *aodv_unreach_dest_tree;
guint8 flags;
guint8 dest_count;
int i;
flags = tvb_get_guint8(tvb, offset);
if (aodv_tree) {
tj = proto_tree_add_text(aodv_tree, tvb, offset, 1, "Flags:");
aodv_flags_tree = proto_item_add_subtree(tj, ett_aodv_flags);
proto_tree_add_boolean(aodv_flags_tree, hf_aodv_flags_rerr_nodelete,
tvb, offset, 1, flags);
if (flags & RERR_NODEL)
proto_item_append_text(tj, " N");
}
offset += 2; /* skip reserved byte */
dest_count = tvb_get_guint8(tvb, offset);
if (aodv_tree)
proto_tree_add_uint(aodv_tree, hf_aodv_destcount, tvb, offset, 1,
dest_count);
if (check_col(pinfo->cinfo, COL_INFO))
col_append_fstr(pinfo->cinfo, COL_INFO, ", Dest Count=%u",
dest_count);
offset += 1;
tj = proto_tree_add_text(aodv_tree, tvb, offset,
(4 + INET6_ADDRLEN)*dest_count,
"Unreachable Destinations");
aodv_unreach_dest_tree = proto_item_add_subtree(tj, ett_aodv_unreach_dest);
for (i = 0; i < dest_count; i++) {
proto_tree_add_item(aodv_unreach_dest_tree, hf_aodv_dest_seqno,
tvb, offset, 4, FALSE);
offset += 4;
proto_tree_add_item(aodv_unreach_dest_tree,
hf_aodv_unreach_dest_ipv6,
tvb, offset, INET6_ADDRLEN, FALSE);
offset += INET6_ADDRLEN;
}
}
static int
dissect_aodv(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
proto_item *ti = NULL;
proto_tree *aodv_tree = NULL;
gboolean is_ipv6;
guint8 type;
/* Make entries in Protocol column and Info column on summary display */
col_set_str(pinfo->cinfo, COL_PROTOCOL, "AODV");
col_clear(pinfo->cinfo, COL_INFO);
/* Is this running over IPv6? */
is_ipv6 = (pinfo->src.type == AT_IPv6);
/* Check the type of AODV packet. */
type = tvb_get_guint8(tvb, 0);
if (match_strval(type, type_vals) == NULL) {
/*
* We assume this is not an AODV packet.
*/
return 0;
}
if (check_col(pinfo->cinfo, COL_INFO))
col_add_str(pinfo->cinfo, COL_INFO,
val_to_str(type, type_vals,
"Unknown AODV Packet Type (%u)"));
if (tree) {
ti = proto_tree_add_protocol_format(tree, proto_aodv, tvb, 0, -1,
"Ad hoc On-demand Distance Vector Routing Protocol, %s",
val_to_str(type, type_vals, "Unknown AODV Packet Type (%u)"));
aodv_tree = proto_item_add_subtree(ti, ett_aodv);
proto_tree_add_uint(aodv_tree, hf_aodv_type, tvb, 0, 1, type);
}
switch (type) {
case RREQ:
dissect_aodv_rreq(tvb, pinfo, aodv_tree, ti, is_ipv6);
break;
case RREP:
dissect_aodv_rrep(tvb, pinfo, aodv_tree, ti, is_ipv6);
break;
case RERR:
dissect_aodv_rerr(tvb, pinfo, aodv_tree, is_ipv6);
break;
case RREP_ACK:
break;
case DRAFT_01_V6_RREQ:
dissect_aodv_draft_01_v6_rreq(tvb, pinfo, aodv_tree, ti);
break;
case DRAFT_01_V6_RREP:
dissect_aodv_draft_01_v6_rrep(tvb, pinfo, aodv_tree, ti);
break;
case DRAFT_01_V6_RERR:
dissect_aodv_draft_01_v6_rerr(tvb, pinfo, aodv_tree);
break;
case DRAFT_01_V6_RREP_ACK:
break;
default:
proto_tree_add_text(aodv_tree, tvb, 0, -1,
"Unknown AODV Packet Type (%u)", type);
}
return tvb_length(tvb);
}
/* Register the protocol with Wireshark */
void
proto_register_aodv(void)
{
static hf_register_info hf[] = {
{ &hf_aodv_type,
{ "Type", "aodv.type",
FT_UINT8, BASE_DEC, VALS(type_vals), 0x0,
"AODV packet type", HFILL }
},
{ &hf_aodv_flags,
{ "Flags", "aodv.flags",
FT_UINT16, BASE_DEC, NULL, 0x0,
NULL, HFILL }
},
{ &hf_aodv_flags_rreq_join,
{ "RREQ Join", "aodv.flags.rreq_join",
FT_BOOLEAN, 8, TFS(&tfs_set_notset), RREQ_JOIN,
NULL, HFILL }
},
{ &hf_aodv_flags_rreq_repair,
{ "RREQ Repair", "aodv.flags.rreq_repair",
FT_BOOLEAN, 8, TFS(&tfs_set_notset), RREQ_REP,
NULL, HFILL }
},
{ &hf_aodv_flags_rreq_gratuitous,
{ "RREQ Gratuitous RREP", "aodv.flags.rreq_gratuitous",
FT_BOOLEAN, 8, TFS(&tfs_set_notset), RREQ_GRATRREP,
NULL, HFILL }
},
{ &hf_aodv_flags_rreq_destinationonly,
{ "RREQ Destination only", "aodv.flags.rreq_destinationonly",
FT_BOOLEAN, 8, TFS(&tfs_set_notset), RREQ_DESTONLY,
NULL, HFILL }
},
{ &hf_aodv_flags_rreq_unknown,
{ "RREQ Unknown Sequence Number", "aodv.flags.rreq_unknown",
FT_BOOLEAN, 8, TFS(&tfs_set_notset), RREQ_UNKNSEQ,
NULL, HFILL }
},
{ &hf_aodv_flags_rrep_repair,
{ "RREP Repair", "aodv.flags.rrep_repair",
FT_BOOLEAN, 8, TFS(&tfs_set_notset), RREP_REP,
NULL, HFILL }
},
{ &hf_aodv_flags_rrep_ack,
{ "RREP Acknowledgement", "aodv.flags.rrep_ack",
FT_BOOLEAN, 8, TFS(&tfs_set_notset), RREP_ACK_REQ,
NULL, HFILL }
},
{ &hf_aodv_flags_rerr_nodelete,
{ "RERR No Delete", "aodv.flags.rerr_nodelete",
FT_BOOLEAN, 8, TFS(&tfs_set_notset), RERR_NODEL,
NULL, HFILL }
},
{ &hf_aodv_prefix_sz,
{ "Prefix Size", "aodv.prefix_sz",
FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL }
},
{ &hf_aodv_hopcount,
{ "Hop Count", "aodv.hopcount",
FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL }
},
{ &hf_aodv_rreq_id,
{ "RREQ Id", "aodv.rreq_id",
FT_UINT32, BASE_DEC, NULL, 0x0,
NULL, HFILL }
},
{ &hf_aodv_dest_ip,
{ "Destination IP", "aodv.dest_ip",
FT_IPv4, BASE_NONE, NULL, 0x0,
"Destination IP Address", HFILL }
},
{ &hf_aodv_dest_ipv6,
{ "Destination IPv6", "aodv.dest_ipv6",
FT_IPv6, BASE_NONE, NULL, 0x0,
"Destination IPv6 Address", HFILL}
},
{ &hf_aodv_dest_seqno,
{ "Destination Sequence Number", "aodv.dest_seqno",
FT_UINT32, BASE_DEC, NULL, 0x0,
NULL, HFILL }
},
{ &hf_aodv_orig_ip,
{ "Originator IP", "aodv.orig_ip",
FT_IPv4, BASE_NONE, NULL, 0x0,
"Originator IP Address", HFILL }
},
{ &hf_aodv_orig_ipv6,
{ "Originator IPv6", "aodv.orig_ipv6",
FT_IPv6, BASE_NONE, NULL, 0x0,
"Originator IPv6 Address", HFILL}
},
{ &hf_aodv_orig_seqno,
{ "Originator Sequence Number", "aodv.orig_seqno",
FT_UINT32, BASE_DEC, NULL, 0x0,
NULL, HFILL }
},
{ &hf_aodv_lifetime,
{ "Lifetime", "aodv.lifetime",
FT_UINT32, BASE_DEC, NULL, 0x0,
NULL, HFILL }
},
{ &hf_aodv_destcount,
{ "Destination Count", "aodv.destcount",
FT_UINT8, BASE_DEC, NULL, 0x0,
"Unreachable Destinations Count", HFILL }
},
{ &hf_aodv_unreach_dest_ip,
{ "Unreachable Destination IP", "aodv.unreach_dest_ip",
FT_IPv4, BASE_NONE, NULL, 0x0,
"Unreachable Destination IP Address", HFILL }
},
{ &hf_aodv_unreach_dest_ipv6,
{ "Unreachable Destination IPv6", "aodv.unreach_dest_ipv6",
FT_IPv6, BASE_NONE, NULL, 0x0,
"Unreachable Destination IPv6 Address", HFILL}
},
{ &hf_aodv_unreach_dest_seqno,
{ "Unreachable Destination Sequence Number", "aodv.unreach_dest_seqno",
FT_UINT32, BASE_DEC, NULL, 0x0,
NULL, HFILL }
},
{ &hf_aodv_ext_type,
{ "Extension Type", "aodv.ext_type",
FT_UINT8, BASE_DEC, NULL, 0x0,
"Extension Format Type", HFILL}
},
{ &hf_aodv_ext_length,
{ "Extension Length", "aodv.ext_length",
FT_UINT8, BASE_DEC, NULL, 0x0,
"Extension Data Length", HFILL}
},
{ &hf_aodv_ext_interval,
{ "Hello Interval", "aodv.hello_interval",
FT_UINT32, BASE_DEC, NULL, 0x0,
"Hello Interval Extension", HFILL}
},
{ &hf_aodv_ext_timestamp,
{ "Timestamp", "aodv.timestamp",
FT_UINT64, BASE_DEC, NULL, 0x0,
"Timestamp Extension", HFILL}
},
};
/* Setup protocol subtree array */
static gint *ett[] = {
&ett_aodv,
&ett_aodv_flags,
&ett_aodv_unreach_dest,
&ett_aodv_extensions,
};
/* Register the protocol name and description */
proto_aodv = proto_register_protocol("Ad hoc On-demand Distance Vector Routing Protocol", "AODV", "aodv");
/* Required function calls to register the header fields and subtrees used */
proto_register_field_array(proto_aodv, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
}
void
proto_reg_handoff_aodv(void)
{
dissector_handle_t aodv_handle;
aodv_handle = new_create_dissector_handle(dissect_aodv,
proto_aodv);
dissector_add_uint("udp.port", UDP_PORT_AODV, aodv_handle);
}
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