diff options
Diffstat (limited to 'epan/dissectors/packet-aodv.c')
| -rw-r--r-- | epan/dissectors/packet-aodv.c | 979 |
1 files changed, 979 insertions, 0 deletions
diff --git a/epan/dissectors/packet-aodv.c b/epan/dissectors/packet-aodv.c new file mode 100644 index 0000000000..b262dccc79 --- /dev/null +++ b/epan/dissectors/packet-aodv.c @@ -0,0 +1,979 @@ +/* packet-aodv.c + * Routines for AODV dissection + * Copyright 2000, Erik Nordström <erik.nordstrom@it.uu.se> + * + * $Id$ + * + * Ethereal - Network traffic analyzer + * By Gerald Combs <gerald@ethereal.com> + * 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 <string.h> + +#include <glib.h> + +#include <epan/int-64bit.h> +#include <epan/packet.h> +#include <epan/ipv6-utils.h> + +#ifndef offsetof +#define offsetof(type, member) ((size_t)(&((type *)0)->member)) +#endif + +/* + * See + * + * http://www.ietf.org/internet-drafts/draft-ietf-manet-aodv-13.txt + * + * http://www.cs.ucsb.edu/~ebelding/txt/aodv6.txt + * + * http://www.tcs.hut.fi/~anttit/manet/drafts/draft-perkins-aodv6-01.txt + */ + +#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_GRAT 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-aodv6-01 Route Request"}, + { DRAFT_01_V6_RREP, "draft-perkins-aodv6-01 Route Reply"}, + { DRAFT_01_V6_RERR, "draft-perkins-aodv6-01 Route Error"}, + { DRAFT_01_V6_RREP_ACK, "draft-perkins-aodv6-01 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_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; + aodv_ext_t aodvext, *ext; + int len; + + if (!tree) + return; + + again: + if ((int) tvb_reported_length(tvb) <= offset) + return; /* No more options left */ + + ext = &aodvext; + tvb_memcpy(tvb, (guint8 *) ext, offset, sizeof(*ext)); + len = ext->length; + + ti = proto_tree_add_text(tree, tvb, offset, sizeof(aodv_ext_t) + + len, "Extensions"); + ext_tree = proto_item_add_subtree(ti, ett_aodv_extensions); + + if (len == 0) { + proto_tree_add_text(ext_tree, tvb, + offset + offsetof(aodv_ext_t, length), 1, + "Invalid option length: %u", ext->length); + return; /* we must not try to decode this */ + } + + proto_tree_add_text(ext_tree, tvb, + offset + offsetof(aodv_ext_t, type), 1, + "Type: %u (%s)", ext->type, + val_to_str(ext->type, exttype_vals, "Unknown")); + proto_tree_add_text(ext_tree, tvb, + offset + offsetof(aodv_ext_t, length), 1, + "Length: %u bytes", ext->length); + + offset += sizeof(aodv_ext_t); + + switch (ext->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 += ext->length; + 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); + if (flags & RREQ_JOIN) + proto_item_append_text(tj, " J"); + if (flags & RREQ_REP) + proto_item_append_text(tj, " R"); + if (flags & RREQ_GRAT) + proto_item_append_text(tj, " G"); + } + 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_memcpy(tvb, (guint8 *)&dest_addr_v6, offset, INET6_ADDRLEN); + 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 { + tvb_memcpy(tvb, (guint8 *)&dest_addr_v4, offset, 4); + 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_memcpy(tvb, (guint8 *)&orig_addr_v6, offset, INET6_ADDRLEN); + 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 { + tvb_memcpy(tvb, (guint8 *)&orig_addr_v4, offset, 4); + 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_memcpy(tvb, (guint8 *)&dest_addr_v6, offset, INET6_ADDRLEN); + 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 { + tvb_memcpy(tvb, (guint8 *)&dest_addr_v4, offset, 4); + 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_memcpy(tvb, (guint8 *)&orig_addr_v6, offset, INET6_ADDRLEN); + 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, ", Dest IP: %s", + ip6_to_str(&orig_addr_v6)); + } + if (check_col(pinfo->cinfo, COL_INFO)) + col_append_fstr(pinfo->cinfo, COL_INFO, ", D: %s", + ip6_to_str(&orig_addr_v6)); + offset += INET6_ADDRLEN; + } else { + tvb_memcpy(tvb, (guint8 *)&orig_addr_v4, offset, 4); + 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); + proto_tree_add_item(aodv_unreach_dest_tree, hf_aodv_dest_seqno, + tvb, offset, 4, FALSE); + offset += INET6_ADDRLEN + 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); + proto_tree_add_item(aodv_unreach_dest_tree, hf_aodv_dest_seqno, + tvb, offset, 4, FALSE); + offset += 4 + 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); + if (flags & RREQ_JOIN) + proto_item_append_text(tj, " J"); + if (flags & RREQ_REP) + proto_item_append_text(tj, " R"); + if (flags & RREQ_GRAT) + proto_item_append_text(tj, " G"); + } + 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_memcpy(tvb, (guint8 *)&dest_addr_v6, offset, INET6_ADDRLEN); + 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_memcpy(tvb, (guint8 *)&orig_addr_v6, offset, INET6_ADDRLEN); + 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) & 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; + + 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_memcpy(tvb, (guint8 *)&dest_addr_v6, offset, INET6_ADDRLEN); + 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_memcpy(tvb, (guint8 *)&orig_addr_v6, offset, INET6_ADDRLEN); + 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, ", Dest IP: %s", + ip6_to_str(&orig_addr_v6)); + } + if (check_col(pinfo->cinfo, COL_INFO)) + col_append_fstr(pinfo->cinfo, COL_INFO, ", D: %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); + proto_tree_add_item(aodv_unreach_dest_tree, + hf_aodv_unreach_dest_ipv6, + tvb, offset, INET6_ADDRLEN, FALSE); + offset += 4 + 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 */ + if (check_col(pinfo->cinfo, COL_PROTOCOL)) + col_set_str(pinfo->cinfo, COL_PROTOCOL, "AODV"); + + if (check_col(pinfo->cinfo, COL_INFO)) + 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_fstr(pinfo->cinfo, COL_INFO, "%s", + 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, tree, ti, is_ipv6); + break; + case RREP: + dissect_aodv_rrep(tvb, pinfo, tree, ti, is_ipv6); + break; + case RERR: + dissect_aodv_rerr(tvb, pinfo, tree, is_ipv6); + break; + case RREP_ACK: + break; + case DRAFT_01_V6_RREQ: + dissect_aodv_draft_01_v6_rreq(tvb, pinfo, tree, ti); + break; + case DRAFT_01_V6_RREP: + dissect_aodv_draft_01_v6_rrep(tvb, pinfo, tree, ti); + break; + case DRAFT_01_V6_RERR: + dissect_aodv_draft_01_v6_rerr(tvb, pinfo, 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 Ethereal */ +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, + "Flags", HFILL } + }, + { &hf_aodv_flags_rreq_join, + { "RREQ Join", "aodv.flags.rreq_join", + FT_BOOLEAN, 8, TFS(&flags_set_truth), RREQ_JOIN, + "", HFILL } + }, + { &hf_aodv_flags_rreq_repair, + { "RREQ Repair", "aodv.flags.rreq_repair", + FT_BOOLEAN, 8, TFS(&flags_set_truth), RREQ_REP, + "", HFILL } + }, + { &hf_aodv_flags_rreq_gratuitous, + { "RREQ Gratuitous", "aodv.flags.rreq_gratuitous", + FT_BOOLEAN, 8, TFS(&flags_set_truth), RREQ_GRAT, + "", HFILL } + }, + { &hf_aodv_flags_rrep_repair, + { "RREP Repair", "aodv.flags.rrep_repair", + FT_BOOLEAN, 8, TFS(&flags_set_truth), RREP_REP, + "", HFILL } + }, + { &hf_aodv_flags_rrep_ack, + { "RREP Acknowledgement", "aodv.flags.rrep_ack", + FT_BOOLEAN, 8, TFS(&flags_set_truth), RREP_ACK_REQ, + "", HFILL } + }, + { &hf_aodv_flags_rerr_nodelete, + { "RERR No Delete", "aodv.flags.rerr_nodelete", + FT_BOOLEAN, 8, TFS(&flags_set_truth), RERR_NODEL, + "", HFILL } + }, + { &hf_aodv_prefix_sz, + { "Prefix Size", "aodv.prefix_sz", + FT_UINT8, BASE_DEC, NULL, 0x0, + "Prefix Size", HFILL } + }, + { &hf_aodv_hopcount, + { "Hop Count", "aodv.hopcount", + FT_UINT8, BASE_DEC, NULL, 0x0, + "Hop Count", HFILL } + }, + { &hf_aodv_rreq_id, + { "RREQ Id", "aodv.rreq_id", + FT_UINT32, BASE_DEC, NULL, 0x0, + "RREQ Id", 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, + "Destination Sequence Number", 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, + "Originator Sequence Number", HFILL } + }, + { &hf_aodv_lifetime, + { "Lifetime", "aodv.lifetime", + FT_UINT32, BASE_DEC, NULL, 0x0, + "Lifetime", 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, + "Unreachable Destination Sequence Number", 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("udp.port", UDP_PORT_AODV, aodv_handle); +} |