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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>
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "config.h"
#include <stddef.h>
#include <epan/packet.h>
#include <epan/to_str.h>
#include <epan/expert.h>
/*
* 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)
*/
void proto_register_aodv(void);
void proto_reg_handoff_aodv(void);
#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 0x0800
#define RREQ_DESTONLY 0x1000
#define RREQ_GRATRREP 0x2000
#define RREQ_REP 0x4000
#define RREQ_JOIN 0x8000
#define RREP_ACK_REQ 0x4000
#define RREP_REP 0x8000
#define RERR_NODEL 0x8000
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;
static expert_field ei_aodv_ext_length = EI_INIT;
static expert_field ei_aodv_type = EI_INIT;
/* Code to actually dissect the packets */
static void
dissect_aodv_ext(tvbuff_t * tvb, packet_info *pinfo, int offset, proto_tree * tree)
{
proto_tree *ext_tree;
proto_item *len_item;
guint8 type, len;
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);
ext_tree = proto_tree_add_subtree(tree, tvb, offset, 2 + len, ett_aodv_extensions, NULL, "Extensions");
proto_tree_add_item(ext_tree, hf_aodv_ext_type, tvb, offset, 1, ENC_BIG_ENDIAN);
len_item = proto_tree_add_uint(ext_tree, hf_aodv_ext_length, tvb, offset + 1, 1, len);
if (len == 0) {
expert_add_info(pinfo, len_item, &ei_aodv_ext_length);
return; /* we must not try to decode this */
}
offset += 2;
switch (type) {
case AODV_EXT_INT:
proto_tree_add_item(ext_tree, hf_aodv_ext_interval,
tvb, offset, 4, ENC_BIG_ENDIAN);
break;
case AODV_EXT_NTP:
proto_tree_add_item(ext_tree, hf_aodv_ext_timestamp,
tvb, offset, 8, ENC_BIG_ENDIAN);
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;
guint8 hop_count;
guint32 rreq_id;
const gchar *dest_addr_v4;
const gchar *dest_addr_v6;
guint32 dest_seqno;
const gchar *orig_addr_v4;
const gchar *orig_addr_v6;
guint32 orig_seqno;
int extlen;
static int * const aodv_flags[] = {
&hf_aodv_flags_rreq_join,
&hf_aodv_flags_rreq_repair,
&hf_aodv_flags_rreq_gratuitous,
&hf_aodv_flags_rreq_destinationonly,
&hf_aodv_flags_rreq_unknown,
NULL
};
proto_tree_add_bitmask_with_flags(aodv_tree, tvb, offset, hf_aodv_flags,
ett_aodv_flags, aodv_flags, ENC_BIG_ENDIAN, BMT_NO_FALSE | BMT_NO_TFS | BMT_NO_INT);
offset += 2; /* skip reserved byte */
hop_count = tvb_get_guint8(tvb, offset);
proto_tree_add_uint(aodv_tree, hf_aodv_hopcount, tvb, offset, 1,
hop_count);
offset += 1;
rreq_id = tvb_get_ntohl(tvb, offset);
proto_tree_add_uint(aodv_tree, hf_aodv_rreq_id, tvb, offset, 4,
rreq_id);
offset += 4;
if (is_ipv6) {
dest_addr_v6 = tvb_ip6_to_str(tvb, offset);
if (aodv_tree) {
proto_tree_add_item(aodv_tree, hf_aodv_dest_ipv6, tvb, offset,
INET6_ADDRLEN, ENC_NA);
proto_item_append_text(ti, ", Dest IP: %s", dest_addr_v6);
}
col_append_fstr(pinfo->cinfo, COL_INFO, ", D: %s", dest_addr_v6);
offset += INET6_ADDRLEN;
} else {
dest_addr_v4 = tvb_ip_to_str(tvb, offset);
if (aodv_tree) {
proto_tree_add_item(aodv_tree, hf_aodv_dest_ip, tvb, offset, 4,
ENC_BIG_ENDIAN);
proto_item_append_text(ti, ", Dest IP: %s", dest_addr_v4);
}
col_append_fstr(pinfo->cinfo, COL_INFO, ", D: %s", dest_addr_v4);
offset += 4;
}
dest_seqno = tvb_get_ntohl(tvb, offset);
proto_tree_add_uint(aodv_tree, hf_aodv_dest_seqno, tvb, offset, 4,
dest_seqno);
offset += 4;
if (is_ipv6) {
orig_addr_v6 = tvb_ip6_to_str(tvb, offset);
if (aodv_tree) {
proto_tree_add_item(aodv_tree, hf_aodv_orig_ipv6, tvb, offset,
INET6_ADDRLEN, ENC_NA);
proto_item_append_text(ti, ", Orig IP: %s", orig_addr_v6);
}
col_append_fstr(pinfo->cinfo, COL_INFO, ", O: %s", orig_addr_v6);
offset += INET6_ADDRLEN;
} else {
orig_addr_v4 = tvb_ip_to_str(tvb, offset);
if (aodv_tree) {
proto_tree_add_item(aodv_tree, hf_aodv_orig_ip, tvb, offset, 4,
ENC_BIG_ENDIAN);
proto_item_append_text(ti, ", Orig IP: %s", orig_addr_v4);
}
col_append_fstr(pinfo->cinfo, COL_INFO, ", O: %s", orig_addr_v4);
offset += 4;
}
orig_seqno = tvb_get_ntohl(tvb, offset);
proto_tree_add_uint(aodv_tree, hf_aodv_orig_seqno, tvb, offset, 4,
orig_seqno);
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;
extlen = tvb_reported_length_remaining(tvb, offset);
if (extlen > 0)
dissect_aodv_ext(tvb, pinfo, 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;
guint16 flags;
guint8 prefix_sz;
guint8 hop_count;
const gchar *dest_addr_v4;
const gchar *dest_addr_v6;
guint32 dest_seqno;
const gchar *orig_addr_v4;
const gchar *orig_addr_v6;
guint32 lifetime;
int extlen;
static int * const aodv_flags[] = {
&hf_aodv_flags_rrep_repair,
&hf_aodv_flags_rrep_ack,
NULL
};
flags = tvb_get_ntohs(tvb, offset);
proto_tree_add_bitmask_with_flags(aodv_tree, tvb, offset, hf_aodv_flags,
ett_aodv_flags, aodv_flags, ENC_BIG_ENDIAN, BMT_NO_FALSE | BMT_NO_TFS | BMT_NO_INT);
offset += 1;
prefix_sz = flags & 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) {
dest_addr_v6 = tvb_ip6_to_str(tvb, offset);
if (aodv_tree) {
proto_tree_add_item(aodv_tree, hf_aodv_dest_ipv6, tvb, offset,
INET6_ADDRLEN, ENC_NA);
proto_item_append_text(ti, ", Dest IP: %s", dest_addr_v6);
}
col_append_fstr(pinfo->cinfo, COL_INFO, ", D: %s", dest_addr_v6);
offset += INET6_ADDRLEN;
} else {
dest_addr_v4 = tvb_ip_to_str(tvb, offset);
if (aodv_tree) {
proto_tree_add_item(aodv_tree, hf_aodv_dest_ip, tvb, offset, 4,
ENC_BIG_ENDIAN);
proto_item_append_text(ti, ", Dest IP: %s", dest_addr_v4);
}
col_append_fstr(pinfo->cinfo, COL_INFO, ", D: %s", 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) {
orig_addr_v6 = tvb_ip6_to_str(tvb, offset);
if (aodv_tree) {
proto_tree_add_item(aodv_tree, hf_aodv_orig_ipv6, tvb, offset,
INET6_ADDRLEN, ENC_NA);
proto_item_append_text(ti, ", Orig IP: %s", orig_addr_v6);
}
col_append_fstr(pinfo->cinfo, COL_INFO, ", O: %s", orig_addr_v6);
offset += INET6_ADDRLEN;
} else {
orig_addr_v4 = tvb_ip_to_str(tvb, offset);
if (aodv_tree) {
proto_tree_add_item(aodv_tree, hf_aodv_orig_ip, tvb, offset, 4,
ENC_BIG_ENDIAN);
proto_item_append_text(ti, ", Orig IP: %s", orig_addr_v4);
}
col_append_fstr(pinfo->cinfo, COL_INFO, ", O: %s", 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);
}
col_append_fstr(pinfo->cinfo, COL_INFO, " Hcnt=%u DSN=%u Lifetime=%u",
hop_count,
dest_seqno,
lifetime);
offset += 4;
extlen = tvb_reported_length_remaining(tvb, offset);
if (extlen > 0)
dissect_aodv_ext(tvb, pinfo, 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_tree *aodv_unreach_dest_tree;
guint8 dest_count;
int i;
static int * const aodv_flags[] = {
&hf_aodv_flags_rerr_nodelete,
NULL
};
proto_tree_add_bitmask_with_flags(aodv_tree, tvb, offset, hf_aodv_flags,
ett_aodv_flags, aodv_flags, ENC_BIG_ENDIAN, BMT_NO_FALSE | BMT_NO_TFS | BMT_NO_INT);
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);
col_append_fstr(pinfo->cinfo, COL_INFO, ", Dest Count=%u",
dest_count);
offset += 1;
if (is_ipv6) {
aodv_unreach_dest_tree = proto_tree_add_subtree(aodv_tree, tvb, offset,
(INET6_ADDRLEN + 4)*dest_count, ett_aodv_unreach_dest, NULL,
"Unreachable Destinations");
for (i = 0; i < dest_count; i++) {
proto_tree_add_item(aodv_unreach_dest_tree,
hf_aodv_unreach_dest_ipv6,
tvb, offset, INET6_ADDRLEN, ENC_NA);
offset += INET6_ADDRLEN;
proto_tree_add_item(aodv_unreach_dest_tree, hf_aodv_dest_seqno,
tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
}
} else {
aodv_unreach_dest_tree = proto_tree_add_subtree(aodv_tree, tvb, offset, (4 + 4)*dest_count,
ett_aodv_unreach_dest, NULL, "Unreachable Destinations");
for (i = 0; i < dest_count; i++) {
proto_tree_add_item(aodv_unreach_dest_tree, hf_aodv_unreach_dest_ip,
tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
proto_tree_add_item(aodv_unreach_dest_tree, hf_aodv_dest_seqno,
tvb, offset, 4, ENC_BIG_ENDIAN);
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;
guint8 hop_count;
guint32 rreq_id;
guint32 dest_seqno;
guint32 orig_seqno;
const gchar *dest_addr_v6;
const gchar *orig_addr_v6;
int extlen;
static int * const aodv_flags[] = {
&hf_aodv_flags_rreq_join,
&hf_aodv_flags_rreq_repair,
&hf_aodv_flags_rreq_gratuitous,
&hf_aodv_flags_rreq_destinationonly,
&hf_aodv_flags_rreq_unknown,
NULL
};
proto_tree_add_bitmask_with_flags(aodv_tree, tvb, offset, hf_aodv_flags,
ett_aodv_flags, aodv_flags, ENC_BIG_ENDIAN, BMT_NO_FALSE | BMT_NO_TFS | BMT_NO_INT);
offset += 2; /* skip reserved byte */
hop_count = tvb_get_guint8(tvb, offset);
proto_tree_add_uint(aodv_tree, hf_aodv_hopcount, tvb, offset, 1,
hop_count);
offset += 1;
rreq_id = tvb_get_ntohl(tvb, offset);
proto_tree_add_uint(aodv_tree, hf_aodv_rreq_id, tvb, offset, 4,
rreq_id);
offset += 4;
dest_seqno = tvb_get_ntohl(tvb, offset);
proto_tree_add_uint(aodv_tree, hf_aodv_dest_seqno, tvb, offset, 4,
dest_seqno);
offset += 4;
orig_seqno = tvb_get_ntohl(tvb, offset);
proto_tree_add_uint(aodv_tree, hf_aodv_orig_seqno, tvb, offset, 4,
orig_seqno);
offset += 4;
dest_addr_v6 = tvb_ip6_to_str(tvb, offset);
if (aodv_tree) {
proto_tree_add_item(aodv_tree, hf_aodv_dest_ipv6, tvb, offset,
INET6_ADDRLEN, ENC_NA);
proto_item_append_text(ti, ", Dest IP: %s", dest_addr_v6);
}
col_append_fstr(pinfo->cinfo, COL_INFO, ", D: %s", dest_addr_v6);
offset += INET6_ADDRLEN;
orig_addr_v6 = tvb_ip6_to_str(tvb, offset);
if (aodv_tree) {
proto_tree_add_item(aodv_tree, hf_aodv_orig_ipv6, tvb, offset,
INET6_ADDRLEN, ENC_NA);
proto_item_append_text(ti, ", Orig IP: %s", orig_addr_v6);
}
col_append_fstr(pinfo->cinfo, COL_INFO,
", O: %s Id=%u Hcnt=%u DSN=%u OSN=%u",
orig_addr_v6,
rreq_id,
hop_count,
dest_seqno,
orig_seqno);
offset += INET6_ADDRLEN;
extlen = tvb_reported_length_remaining(tvb, offset);
if (extlen > 0)
dissect_aodv_ext(tvb, pinfo, 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;
guint16 flags;
guint8 prefix_sz;
guint8 hop_count;
guint32 dest_seqno;
const gchar *dest_addr_v6;
const gchar *orig_addr_v6;
guint32 lifetime;
int extlen;
static int * const aodv_flags[] = {
&hf_aodv_flags_rrep_repair,
&hf_aodv_flags_rrep_ack,
NULL
};
flags = tvb_get_ntohs(tvb, offset);
proto_tree_add_bitmask_with_flags(aodv_tree, tvb, offset, hf_aodv_flags,
ett_aodv_flags, aodv_flags, ENC_BIG_ENDIAN, BMT_NO_FALSE | BMT_NO_TFS | BMT_NO_INT);
offset += 1;
prefix_sz = flags & 0x7F;
proto_tree_add_uint(aodv_tree, hf_aodv_prefix_sz, tvb, offset, 1,
prefix_sz);
offset += 1;
hop_count = tvb_get_guint8(tvb, offset);
proto_tree_add_uint(aodv_tree, hf_aodv_hopcount, tvb, offset, 1,
hop_count);
offset += 1;
dest_seqno = tvb_get_ntohl(tvb, offset);
proto_tree_add_uint(aodv_tree, hf_aodv_dest_seqno, tvb, offset, 4,
dest_seqno);
offset += 4;
dest_addr_v6 = tvb_ip6_to_str(tvb, offset);
if (aodv_tree) {
proto_tree_add_item(aodv_tree, hf_aodv_dest_ipv6, tvb, offset,
INET6_ADDRLEN, ENC_NA);
proto_item_append_text(ti, ", Dest IP: %s", dest_addr_v6);
}
col_append_fstr(pinfo->cinfo, COL_INFO, ", D: %s", dest_addr_v6);
offset += INET6_ADDRLEN;
orig_addr_v6 = tvb_ip6_to_str(tvb, offset);
if (aodv_tree) {
proto_tree_add_item(aodv_tree, hf_aodv_orig_ipv6, tvb, offset,
INET6_ADDRLEN, ENC_NA);
proto_item_append_text(ti, ", Orig IP: %s", orig_addr_v6);
}
col_append_fstr(pinfo->cinfo, COL_INFO, ", O: %s", 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);
}
col_append_fstr(pinfo->cinfo, COL_INFO, " Hcnt=%u DSN=%u Lifetime=%u",
hop_count,
dest_seqno,
lifetime);
offset += 4;
extlen = tvb_reported_length_remaining(tvb, offset);
if (extlen > 0)
dissect_aodv_ext(tvb, pinfo, 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_tree *aodv_unreach_dest_tree;
guint8 dest_count;
int i;
static int * const aodv_flags[] = {
&hf_aodv_flags_rerr_nodelete,
NULL
};
proto_tree_add_bitmask_with_flags(aodv_tree, tvb, offset, hf_aodv_flags,
ett_aodv_flags, aodv_flags, ENC_BIG_ENDIAN, BMT_NO_FALSE | BMT_NO_TFS | BMT_NO_INT);
offset += 2; /* skip reserved byte */
dest_count = tvb_get_guint8(tvb, offset);
proto_tree_add_uint(aodv_tree, hf_aodv_destcount, tvb, offset, 1,
dest_count);
col_append_fstr(pinfo->cinfo, COL_INFO, ", Dest Count=%u",
dest_count);
offset += 1;
aodv_unreach_dest_tree = proto_tree_add_subtree(aodv_tree, tvb, offset,
(4 + INET6_ADDRLEN)*dest_count,
ett_aodv_unreach_dest, NULL,
"Unreachable Destinations");
for (i = 0; i < dest_count; i++) {
proto_tree_add_item(aodv_unreach_dest_tree, hf_aodv_dest_seqno,
tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
proto_tree_add_item(aodv_unreach_dest_tree,
hf_aodv_unreach_dest_ipv6,
tvb, offset, INET6_ADDRLEN, ENC_NA);
offset += INET6_ADDRLEN;
}
}
static int
dissect_aodv(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
{
proto_item *ti, *type_item;
proto_tree *aodv_tree;
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 (try_val_to_str(type, type_vals) == NULL) {
/*
* We assume this is not an AODV packet.
*/
return 0;
}
col_add_str(pinfo->cinfo, COL_INFO,
val_to_str(type, type_vals,
"Unknown AODV Packet Type (%u)"));
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);
type_item = 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:
expert_add_info(pinfo, type_item, &ei_aodv_type);
}
return tvb_reported_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, 16, TFS(&tfs_set_notset), RREQ_JOIN,
NULL, HFILL }
},
{ &hf_aodv_flags_rreq_repair,
{ "RREQ Repair", "aodv.flags.rreq_repair",
FT_BOOLEAN, 16, TFS(&tfs_set_notset), RREQ_REP,
NULL, HFILL }
},
{ &hf_aodv_flags_rreq_gratuitous,
{ "RREQ Gratuitous RREP", "aodv.flags.rreq_gratuitous",
FT_BOOLEAN, 16, TFS(&tfs_set_notset), RREQ_GRATRREP,
NULL, HFILL }
},
{ &hf_aodv_flags_rreq_destinationonly,
{ "RREQ Destination only", "aodv.flags.rreq_destinationonly",
FT_BOOLEAN, 16, TFS(&tfs_set_notset), RREQ_DESTONLY,
NULL, HFILL }
},
{ &hf_aodv_flags_rreq_unknown,
{ "RREQ Unknown Sequence Number", "aodv.flags.rreq_unknown",
FT_BOOLEAN, 16, TFS(&tfs_set_notset), RREQ_UNKNSEQ,
NULL, HFILL }
},
{ &hf_aodv_flags_rrep_repair,
{ "RREP Repair", "aodv.flags.rrep_repair",
FT_BOOLEAN, 16, TFS(&tfs_set_notset), RREP_REP,
NULL, HFILL }
},
{ &hf_aodv_flags_rrep_ack,
{ "RREP Acknowledgement", "aodv.flags.rrep_ack",
FT_BOOLEAN, 16, TFS(&tfs_set_notset), RREP_ACK_REQ,
NULL, HFILL }
},
{ &hf_aodv_flags_rerr_nodelete,
{ "RERR No Delete", "aodv.flags.rerr_nodelete",
FT_BOOLEAN, 16, 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}
},
#if 0
{ &hf_aodv_unreach_dest_seqno,
{ "Unreachable Destination Sequence Number", "aodv.unreach_dest_seqno",
FT_UINT32, BASE_DEC, NULL, 0x0,
NULL, HFILL }
},
#endif
{ &hf_aodv_ext_type,
{ "Extension Type", "aodv.ext_type",
FT_UINT8, BASE_DEC, VALS(exttype_vals), 0x0,
"Extension Format Type", HFILL}
},
{ &hf_aodv_ext_length,
{ "Extension Length", "aodv.ext_length",
FT_UINT8, BASE_DEC|BASE_UNIT_STRING, &units_byte_bytes, 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,
};
static ei_register_info ei[] = {
{ &ei_aodv_ext_length, { "aodv.ext_length.invalid", PI_MALFORMED, PI_ERROR, "Invalid option length", EXPFILL }},
{ &ei_aodv_type, { "aodv.ext_type.unknown", PI_PROTOCOL, PI_WARN, "Unknown AODV Packet Type", EXPFILL }},
};
expert_module_t* expert_aodv;
/* 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));
expert_aodv = expert_register_protocol(proto_aodv);
expert_register_field_array(expert_aodv, ei, array_length(ei));
}
void
proto_reg_handoff_aodv(void)
{
dissector_handle_t aodv_handle;
aodv_handle = create_dissector_handle(dissect_aodv,
proto_aodv);
dissector_add_uint_with_preference("udp.port", UDP_PORT_AODV, aodv_handle);
}
/*
* Editor modelines - https://www.wireshark.org/tools/modelines.html
*
* Local variables:
* c-basic-offset: 4
* tab-width: 8
* indent-tabs-mode: nil
* End:
*
* vi: set shiftwidth=4 tabstop=8 expandtab:
* :indentSize=4:tabSize=8:noTabs=true:
*/
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