![Chris Maynard](/assets/img/avatar_default.png)
* Number of ICMP echo requests, replies, lost replies and percent loss. * Min, Max, Average SRT (Service Response Time), and standard deviation. (This is my first tap, so hopefully I didn't miss something, but we'll see ...) TODO: Add a Wireshark tap. svn path=/trunk/; revision=36480
1296 lines
44 KiB
C
1296 lines
44 KiB
C
/* packet-icmp.c
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* Routines for ICMP - Internet Control Message Protocol
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*
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* $Id$
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* Monday, June 27, 2005
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* Support for the ICMP extensions for MPLS
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* (http://www.ietf.org/proceedings/01aug/I-D/draft-ietf-mpls-icmp-02.txt)
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* by Maria-Luiza Crivat <luizacri@gmail.com>
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* & Brice Augustin <bricecotte@gmail.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <glib.h>
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#include <epan/packet.h>
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#include <epan/ipproto.h>
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#include <epan/prefs.h>
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#include <epan/in_cksum.h>
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#include "packet-ip.h"
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#include "packet-icmp.h"
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#include <epan/conversation.h>
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#include <epan/emem.h>
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#include <epan/tap.h>
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static int icmp_tap = -1;
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/* Conversation related data */
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static int hf_icmp_resp_in = -1;
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static int hf_icmp_resp_to = -1;
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static int hf_icmp_resptime = -1;
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typedef struct _icmp_conv_info_t {
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emem_tree_t *pdus;
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} icmp_conv_info_t;
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static icmp_transaction_t *transaction_start(packet_info *pinfo, proto_tree *tree, guint32 *key);
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static icmp_transaction_t *transaction_end(packet_info *pinfo, proto_tree *tree, guint32 *key);
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/* Decode the end of the ICMP payload as ICMP MPLS extensions
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if the packet in the payload has more than 128 bytes */
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static gboolean favor_icmp_mpls_ext = FALSE;
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static int proto_icmp = -1;
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static int hf_icmp_type = -1;
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static int hf_icmp_code = -1;
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static int hf_icmp_checksum = -1;
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static int hf_icmp_checksum_bad = -1;
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static int hf_icmp_ident = -1;
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static int hf_icmp_ident_le = -1;
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static int hf_icmp_seq_num = -1;
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static int hf_icmp_seq_num_le = -1;
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static int hf_icmp_mtu = -1;
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static int hf_icmp_redir_gw = -1;
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/* Mobile ip */
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static int hf_icmp_mip_type = -1;
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static int hf_icmp_mip_length = -1;
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static int hf_icmp_mip_prefix_length = -1;
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static int hf_icmp_mip_seq = -1;
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static int hf_icmp_mip_life = -1;
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static int hf_icmp_mip_flags = -1;
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static int hf_icmp_mip_r = -1;
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static int hf_icmp_mip_b = -1;
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static int hf_icmp_mip_h = -1;
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static int hf_icmp_mip_f = -1;
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static int hf_icmp_mip_m = -1;
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static int hf_icmp_mip_g = -1;
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static int hf_icmp_mip_v = -1;
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static int hf_icmp_mip_rt = -1;
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static int hf_icmp_mip_u = -1;
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static int hf_icmp_mip_x = -1;
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static int hf_icmp_mip_reserved = -1;
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static int hf_icmp_mip_coa = -1;
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static int hf_icmp_mip_challenge = -1;
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/* MPLS extensions */
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static int hf_icmp_mpls = -1;
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static int hf_icmp_mpls_version = -1;
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static int hf_icmp_mpls_reserved = -1;
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static int hf_icmp_mpls_checksum = -1;
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static int hf_icmp_mpls_checksum_bad = -1;
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static int hf_icmp_mpls_length = -1;
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static int hf_icmp_mpls_class = -1;
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static int hf_icmp_mpls_c_type = -1;
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static int hf_icmp_mpls_label = -1;
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static int hf_icmp_mpls_exp = -1;
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static int hf_icmp_mpls_s = -1;
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static int hf_icmp_mpls_ttl = -1;
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static gint ett_icmp = -1;
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static gint ett_icmp_mip = -1;
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static gint ett_icmp_mip_flags = -1;
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/* MPLS extensions */
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static gint ett_icmp_mpls = -1;
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static gint ett_icmp_mpls_object = -1;
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static gint ett_icmp_mpls_stack_object = -1;
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/* ICMP definitions */
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#define ICMP_ECHOREPLY 0
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#define ICMP_UNREACH 3
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#define ICMP_SOURCEQUENCH 4
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#define ICMP_REDIRECT 5
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#define ICMP_ALTHOST 6
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#define ICMP_ECHO 8
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#define ICMP_RTRADVERT 9
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#define ICMP_RTRSOLICIT 10
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#define ICMP_TIMXCEED 11
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#define ICMP_PARAMPROB 12
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#define ICMP_TSTAMP 13
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#define ICMP_TSTAMPREPLY 14
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#define ICMP_IREQ 15
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#define ICMP_IREQREPLY 16
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#define ICMP_MASKREQ 17
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#define ICMP_MASKREPLY 18
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#define ICMP_PHOTURIS 40
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/* ICMP UNREACHABLE */
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#define ICMP_NET_UNREACH 0 /* Network Unreachable */
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#define ICMP_HOST_UNREACH 1 /* Host Unreachable */
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#define ICMP_PROT_UNREACH 2 /* Protocol Unreachable */
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#define ICMP_PORT_UNREACH 3 /* Port Unreachable */
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#define ICMP_FRAG_NEEDED 4 /* Fragmentation Needed/DF set */
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#define ICMP_SR_FAILED 5 /* Source Route failed */
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#define ICMP_NET_UNKNOWN 6
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#define ICMP_HOST_UNKNOWN 7
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#define ICMP_HOST_ISOLATED 8
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#define ICMP_NET_ANO 9
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#define ICMP_HOST_ANO 10
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#define ICMP_NET_UNR_TOS 11
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#define ICMP_HOST_UNR_TOS 12
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#define ICMP_PKT_FILTERED 13 /* Packet filtered */
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#define ICMP_PREC_VIOLATION 14 /* Precedence violation */
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#define ICMP_PREC_CUTOFF 15 /* Precedence cut off */
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#define ICMP_MIP_EXTENSION_PAD 0
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#define ICMP_MIP_MOB_AGENT_ADV 16
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#define ICMP_MIP_PREFIX_LENGTHS 19
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#define ICMP_MIP_CHALLENGE 24
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static dissector_handle_t ip_handle;
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static dissector_handle_t data_handle;
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static const value_string icmp_type_str[] = {
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{ ICMP_ECHOREPLY, "Echo (ping) reply" },
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{ 1, "Reserved" },
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{ 2, "Reserved" },
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{ ICMP_UNREACH, "Destination unreachable" },
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{ ICMP_SOURCEQUENCH, "Source quench (flow control)" },
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{ ICMP_REDIRECT, "Redirect" },
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{ ICMP_ALTHOST, "Alternate host address" },
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{ ICMP_ECHO, "Echo (ping) request" },
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{ ICMP_RTRADVERT, "Router advertisement" },
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{ ICMP_RTRSOLICIT, "Router solicitation" },
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{ ICMP_TIMXCEED, "Time-to-live exceeded" },
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{ ICMP_PARAMPROB, "Parameter problem" },
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{ ICMP_TSTAMP, "Timestamp request" },
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{ ICMP_TSTAMPREPLY, "Timestamp reply" },
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{ ICMP_IREQ, "Information request" },
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{ ICMP_IREQREPLY, "Information reply" },
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{ ICMP_MASKREQ, "Address mask request" },
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{ ICMP_MASKREPLY, "Address mask reply" },
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{ 19, "Reserved (for security)" },
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{ 30, "Traceroute" },
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{ 31, "Datagram Conversion Error" },
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{ 32, "Mobile Host Redirect" },
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{ 33, "IPv6 Where-Are-You" },
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{ 34, "IPv6 I-Am-Here" },
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{ 35, "Mobile Registration Request" },
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{ 36, "Mobile Registration Reply" },
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{ 37, "Domain Name Request" },
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{ 38, "Domain Name Reply" },
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{ 39, "SKIP" },
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{ ICMP_PHOTURIS, "Photuris" },
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{ 41, "Experimental mobility protocols" },
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{ 0, NULL }
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};
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static const value_string unreach_code_str[] = {
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{ ICMP_NET_UNREACH, "Network unreachable" },
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{ ICMP_HOST_UNREACH, "Host unreachable" },
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{ ICMP_PROT_UNREACH, "Protocol unreachable" },
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{ ICMP_PORT_UNREACH, "Port unreachable" },
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{ ICMP_FRAG_NEEDED, "Fragmentation needed" },
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{ ICMP_SR_FAILED, "Source route failed" },
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{ ICMP_NET_UNKNOWN, "Destination network unknown" },
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{ ICMP_HOST_UNKNOWN, "Destination host unknown" },
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{ ICMP_HOST_ISOLATED, "Source host isolated" },
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{ ICMP_NET_ANO, "Network administratively prohibited" },
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{ ICMP_HOST_ANO, "Host administratively prohibited" },
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{ ICMP_NET_UNR_TOS, "Network unreachable for TOS" },
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{ ICMP_HOST_UNR_TOS, "Host unreachable for TOS" },
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{ ICMP_PKT_FILTERED, "Communication administratively filtered" },
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{ ICMP_PREC_VIOLATION, "Host precedence violation" },
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{ ICMP_PREC_CUTOFF, "Precedence cutoff in effect" },
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{ 0, NULL }
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};
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static const value_string redir_code_str[] = {
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{ 0, "Redirect for network" },
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{ 1, "Redirect for host" },
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{ 2, "Redirect for TOS and network" },
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{ 3, "Redirect for TOS and host"},
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{ 0, NULL }
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};
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static const value_string alt_host_code_str[] = {
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{ 0, "Alternate address for host" },
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{ 0, NULL }
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};
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static const value_string rtradvert_code_str[] = {
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{ 0, "Normal router advertisement" },
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{ 16, "Does not route common traffic" },
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{ 0, NULL }
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};
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static const value_string ttl_code_str[] = {
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{ 0, "Time to live exceeded in transit" },
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{ 1, "Fragment reassembly time exceeded" },
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{ 0, NULL }
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};
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static const value_string par_code_str[] = {
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{ 0, "Pointer indicates the error" },
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{ 1, "Required option missing" },
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{ 2, "Bad length" },
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{ 0, NULL }
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};
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static const value_string photuris_code_str[] = {
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{ 0, "Bad SPI" },
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{ 1, "Authentication Failed" },
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{ 2, "Decompression Failed" },
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{ 3, "Decryption Failed" },
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{ 4, "Need Authentication" },
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{ 5, "Need Authorization" },
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{ 0, NULL }
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};
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static const value_string mip_extensions[] = {
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{ ICMP_MIP_EXTENSION_PAD, "One byte padding extension"}, /* RFC 2002 */
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{ ICMP_MIP_MOB_AGENT_ADV, "Mobility Agent Advertisement Extension"},
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/* RFC 2002 */
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{ ICMP_MIP_PREFIX_LENGTHS, "Prefix Lengths Extension"}, /* RFC 2002 */
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{ ICMP_MIP_CHALLENGE, "Challenge Extension"}, /* RFC 3012 */
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{ 0, NULL}
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};
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#define MPLS_STACK_ENTRY_OBJECT_CLASS 1
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#define MPLS_EXTENDED_PAYLOAD_OBJECT_CLASS 2
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#define MPLS_STACK_ENTRY_C_TYPE 1
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#define MPLS_EXTENDED_PAYLOAD_C_TYPE 1
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static conversation_t *
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_find_or_create_conversation(packet_info *pinfo)
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{
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conversation_t *conv = NULL;
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/* Have we seen this conversation before? */
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conv = find_conversation(pinfo->fd->num, &pinfo->src, &pinfo->dst,
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pinfo->ptype, 0, 0, 0);
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if ( conv == NULL )
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{
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/* No, this is a new conversation. */
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conv = conversation_new(pinfo->fd->num, &pinfo->src, &pinfo->dst,
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pinfo->ptype, 0, 0, 0);
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}
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return (conv);
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}
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/*
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* Dissect the mobile ip advertisement extensions.
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*/
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static void
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dissect_mip_extensions(tvbuff_t *tvb, int offset, proto_tree *tree)
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{
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guint8 type;
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guint8 length;
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guint16 flags;
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proto_item *ti;
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proto_tree *mip_tree=NULL;
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proto_tree *flags_tree=NULL;
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gint numCOAs;
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gint i;
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/* Not much to do if we're not parsing everything */
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if (!tree) return;
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while (tvb_reported_length_remaining(tvb, offset) > 0) {
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type = tvb_get_guint8(tvb, offset + 0);
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if (type)
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length = tvb_get_guint8(tvb, offset + 1);
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else
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length=0;
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ti = proto_tree_add_text(tree, tvb, offset,
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type?(length + 2):1,
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"Ext: %s",
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val_to_str(type, mip_extensions,
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"Unknown ext %u"));
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mip_tree = proto_item_add_subtree(ti, ett_icmp_mip);
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switch (type) {
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case ICMP_MIP_EXTENSION_PAD:
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/* One byte padding extension */
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/* Add our fields */
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/* type */
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proto_tree_add_item(mip_tree, hf_icmp_mip_type, tvb, offset,
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1, FALSE);
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offset++;
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break;
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case ICMP_MIP_MOB_AGENT_ADV:
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/* Mobility Agent Advertisement Extension (RFC 2002)*/
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/* Add our fields */
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/* type */
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proto_tree_add_item(mip_tree, hf_icmp_mip_type, tvb, offset,
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1, FALSE);
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offset++;
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/* length */
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proto_tree_add_item(mip_tree, hf_icmp_mip_length, tvb, offset,
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1, FALSE);
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offset++;
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/* sequence number */
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proto_tree_add_item(mip_tree, hf_icmp_mip_seq, tvb, offset,
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2, FALSE);
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offset+=2;
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/* Registration Lifetime */
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proto_tree_add_item(mip_tree, hf_icmp_mip_life, tvb, offset,
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2, FALSE);
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offset+=2;
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/* flags */
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flags = tvb_get_ntohs(tvb, offset);
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ti = proto_tree_add_uint(mip_tree, hf_icmp_mip_flags, tvb, offset, 2, flags);
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flags_tree = proto_item_add_subtree(ti, ett_icmp_mip_flags);
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proto_tree_add_boolean(flags_tree, hf_icmp_mip_r, tvb, offset, 2, flags);
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proto_tree_add_boolean(flags_tree, hf_icmp_mip_b, tvb, offset, 2, flags);
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proto_tree_add_boolean(flags_tree, hf_icmp_mip_h, tvb, offset, 2, flags);
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proto_tree_add_boolean(flags_tree, hf_icmp_mip_f, tvb, offset, 2, flags);
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proto_tree_add_boolean(flags_tree, hf_icmp_mip_m, tvb, offset, 2, flags);
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proto_tree_add_boolean(flags_tree, hf_icmp_mip_g, tvb, offset, 2, flags);
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proto_tree_add_boolean(flags_tree, hf_icmp_mip_v, tvb, offset, 2, flags);
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proto_tree_add_boolean(flags_tree, hf_icmp_mip_rt, tvb, offset, 2, flags);
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proto_tree_add_boolean(flags_tree, hf_icmp_mip_u, tvb, offset, 2, flags);
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proto_tree_add_boolean(flags_tree, hf_icmp_mip_x, tvb, offset, 2, flags);
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/* Reserved */
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proto_tree_add_uint(flags_tree, hf_icmp_mip_reserved, tvb, offset, 2, flags);
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offset+=2;
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/* COAs */
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numCOAs = (length - 6) / 4;
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for (i=0; i<numCOAs; i++) {
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proto_tree_add_item(mip_tree, hf_icmp_mip_coa, tvb, offset,
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4, FALSE);
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offset+=4;
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}
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break;
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case ICMP_MIP_PREFIX_LENGTHS:
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/* Prefix-Lengths Extension (RFC 2002)*/
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/* Add our fields */
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/* type */
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proto_tree_add_item(mip_tree, hf_icmp_mip_type, tvb, offset,
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1, FALSE);
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offset++;
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/* length */
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proto_tree_add_item(mip_tree, hf_icmp_mip_length, tvb, offset,
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1, FALSE);
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offset++;
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/* prefix lengths */
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for(i=0; i<length; i++) {
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proto_tree_add_item(mip_tree, hf_icmp_mip_prefix_length, tvb, offset,
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1, FALSE);
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offset++;
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}
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break;
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case ICMP_MIP_CHALLENGE:
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/* Challenge Extension (RFC 3012)*/
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/* type */
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proto_tree_add_item(mip_tree, hf_icmp_mip_type, tvb, offset,
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1, FALSE);
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offset++;
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/* length */
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proto_tree_add_item(mip_tree, hf_icmp_mip_length, tvb, offset,
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1, FALSE);
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offset++;
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/* challenge */
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proto_tree_add_item(mip_tree, hf_icmp_mip_challenge, tvb, offset,
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length, FALSE);
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offset+=length;
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break;
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default:
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/* type */
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proto_tree_add_item(mip_tree, hf_icmp_mip_type, tvb, offset,
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1, FALSE);
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offset++;
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/* length */
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proto_tree_add_item(mip_tree, hf_icmp_mip_length, tvb, offset,
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1, FALSE);
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offset++;
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/* data, if any */
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if (length != 0) {
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proto_tree_add_text(mip_tree, tvb, offset, length, "Contents");
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offset+=length;
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}
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break;
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} /* switch type */
|
|
} /* end while */
|
|
|
|
} /* dissect_mip_extensions */
|
|
|
|
/*
|
|
* Dissect the MPLS extensions
|
|
*/
|
|
static void
|
|
dissect_mpls_extensions(tvbuff_t *tvb, gint offset, proto_tree *tree)
|
|
{
|
|
guint8 version;
|
|
guint8 class_num;
|
|
guint8 c_type;
|
|
guint8 ttl;
|
|
guint8 tmp;
|
|
guint16 reserved;
|
|
guint16 cksum, computed_cksum;
|
|
guint16 obj_length, obj_trunc_length;
|
|
proto_item *ti, *tf_object, *tf_entry, *hidden_item;
|
|
proto_tree *mpls_tree=NULL, *mpls_object_tree, *mpls_stack_object_tree;
|
|
gint obj_end_offset;
|
|
guint reported_length;
|
|
guint label;
|
|
gboolean unknown_object;
|
|
|
|
if (!tree)
|
|
return;
|
|
|
|
reported_length = tvb_reported_length_remaining(tvb, offset);
|
|
|
|
if (reported_length < 4 /* Common header */)
|
|
{
|
|
proto_tree_add_text(tree, tvb, offset,
|
|
reported_length,
|
|
"MPLS Extensions (truncated)");
|
|
return;
|
|
}
|
|
|
|
/* Add a tree for the MPLS extensions */
|
|
ti = proto_tree_add_none_format(tree, hf_icmp_mpls, tvb,
|
|
offset, reported_length, "MPLS Extensions");
|
|
|
|
mpls_tree = proto_item_add_subtree(ti, ett_icmp_mpls);
|
|
|
|
/* Version */
|
|
version = hi_nibble(tvb_get_guint8(tvb, offset));
|
|
proto_tree_add_uint(mpls_tree, hf_icmp_mpls_version, tvb, offset, 1, version);
|
|
|
|
/* Reserved */
|
|
reserved = tvb_get_ntohs(tvb, offset) & 0x0fff;
|
|
proto_tree_add_uint_format(mpls_tree, hf_icmp_mpls_reserved,
|
|
tvb, offset, 2, reserved,
|
|
"Reserved: 0x%03x", reserved);
|
|
|
|
/* Checksum */
|
|
cksum = tvb_get_ntohs(tvb, offset + 2);
|
|
|
|
computed_cksum = ip_checksum(tvb_get_ptr(tvb, offset, reported_length),
|
|
reported_length);
|
|
|
|
if (computed_cksum == 0)
|
|
{
|
|
proto_tree_add_uint_format(mpls_tree, hf_icmp_mpls_checksum, tvb, offset + 2, 2,
|
|
cksum, "Checksum: 0x%04x [correct]", cksum);
|
|
}
|
|
else
|
|
{
|
|
hidden_item = proto_tree_add_boolean(mpls_tree, hf_icmp_mpls_checksum_bad, tvb,
|
|
offset + 2, 2, TRUE);
|
|
PROTO_ITEM_SET_HIDDEN(hidden_item);
|
|
|
|
proto_tree_add_uint_format(mpls_tree, hf_icmp_mpls_checksum, tvb, offset + 2, 2,
|
|
cksum,
|
|
"Checksum: 0x%04x [incorrect, should be 0x%04x]",
|
|
cksum, in_cksum_shouldbe(cksum, computed_cksum));
|
|
}
|
|
|
|
if (version != 1 && version != 2)
|
|
{
|
|
/* Unsupported version */
|
|
proto_item_append_text(ti, " (unsupported version)");
|
|
return;
|
|
}
|
|
|
|
/* Skip the common header */
|
|
offset += 4;
|
|
|
|
/* While there is enough room to read an object */
|
|
while (tvb_reported_length_remaining(tvb, offset) >= 4 /* Object header */)
|
|
{
|
|
/* Object length */
|
|
obj_length = tvb_get_ntohs(tvb, offset);
|
|
|
|
obj_trunc_length = MIN(obj_length, tvb_reported_length_remaining(tvb, offset));
|
|
|
|
obj_end_offset = offset + obj_trunc_length;
|
|
|
|
/* Add a subtree for this object (the text will be reset later) */
|
|
tf_object = proto_tree_add_text(mpls_tree, tvb, offset,
|
|
MAX(obj_trunc_length, 4),
|
|
"Unknown object");
|
|
|
|
mpls_object_tree = proto_item_add_subtree(tf_object, ett_icmp_mpls_object);
|
|
|
|
proto_tree_add_uint(mpls_object_tree, hf_icmp_mpls_length, tvb, offset, 2, obj_length);
|
|
|
|
/* Class */
|
|
class_num = tvb_get_guint8(tvb, offset + 2);
|
|
proto_tree_add_uint(mpls_object_tree, hf_icmp_mpls_class, tvb, offset + 2, 1, class_num);
|
|
|
|
/* C-Type */
|
|
c_type = tvb_get_guint8(tvb, offset + 3);
|
|
proto_tree_add_uint(mpls_object_tree, hf_icmp_mpls_c_type, tvb, offset + 3, 1, c_type);
|
|
|
|
if (obj_length < 4 /* Object header */)
|
|
{
|
|
/* Thanks doc/README.developer :)) */
|
|
proto_item_set_text(tf_object, "Object with bad length");
|
|
break;
|
|
}
|
|
|
|
/* Skip the object header */
|
|
offset += 4;
|
|
|
|
/* Default cases will set this flag to TRUE */
|
|
unknown_object = FALSE;
|
|
|
|
switch (class_num)
|
|
{
|
|
case MPLS_STACK_ENTRY_OBJECT_CLASS:
|
|
switch (c_type)
|
|
{
|
|
case MPLS_STACK_ENTRY_C_TYPE:
|
|
|
|
proto_item_set_text(tf_object, "MPLS Stack Entry");
|
|
|
|
/* For each entry */
|
|
while (offset + 4 <= obj_end_offset)
|
|
{
|
|
if (tvb_reported_length_remaining(tvb, offset) < 4)
|
|
{
|
|
/* Not enough room in the packet ! */
|
|
break;
|
|
}
|
|
|
|
/* Create a subtree for each entry (the text will be set later) */
|
|
tf_entry = proto_tree_add_text(mpls_object_tree,
|
|
tvb, offset, 4, " ");
|
|
mpls_stack_object_tree = proto_item_add_subtree(tf_entry,
|
|
ett_icmp_mpls_stack_object);
|
|
|
|
/* Label */
|
|
label = (guint)tvb_get_ntohs(tvb, offset);
|
|
tmp = tvb_get_guint8(tvb, offset + 2);
|
|
label = (label << 4) + (tmp >> 4);
|
|
|
|
proto_tree_add_uint(mpls_stack_object_tree,
|
|
hf_icmp_mpls_label,
|
|
tvb,
|
|
offset,
|
|
3,
|
|
label << 4);
|
|
|
|
proto_item_set_text(tf_entry, "Label: %u", label);
|
|
|
|
/* Experimental field (also called "CoS") */
|
|
proto_tree_add_uint(mpls_stack_object_tree,
|
|
hf_icmp_mpls_exp,
|
|
tvb,
|
|
offset + 2,
|
|
1,
|
|
tmp);
|
|
|
|
proto_item_append_text(tf_entry, ", Exp: %u", (tmp >> 1) & 0x07);
|
|
|
|
/* Stack bit */
|
|
proto_tree_add_boolean(mpls_stack_object_tree,
|
|
hf_icmp_mpls_s,
|
|
tvb,
|
|
offset + 2,
|
|
1,
|
|
tmp);
|
|
|
|
proto_item_append_text(tf_entry, ", S: %u", tmp & 0x01);
|
|
|
|
/* TTL */
|
|
ttl = tvb_get_guint8(tvb, offset + 3);
|
|
|
|
proto_tree_add_item(mpls_stack_object_tree,
|
|
hf_icmp_mpls_ttl,
|
|
tvb,
|
|
offset + 3,
|
|
1,
|
|
FALSE);
|
|
|
|
proto_item_append_text(tf_entry, ", TTL: %u", ttl);
|
|
|
|
/* Skip the entry */
|
|
offset += 4;
|
|
|
|
} /* end while */
|
|
|
|
if (offset < obj_end_offset)
|
|
proto_tree_add_text(mpls_object_tree, tvb,
|
|
offset,
|
|
obj_end_offset - offset,
|
|
"%d junk bytes",
|
|
obj_end_offset - offset);
|
|
|
|
break;
|
|
default:
|
|
|
|
unknown_object = TRUE;
|
|
|
|
break;
|
|
} /* end switch c_type */
|
|
break;
|
|
case MPLS_EXTENDED_PAYLOAD_OBJECT_CLASS:
|
|
switch (c_type)
|
|
{
|
|
case MPLS_EXTENDED_PAYLOAD_C_TYPE:
|
|
proto_item_set_text(tf_object, "Extended Payload");
|
|
|
|
/* This object contains some portion of the original packet
|
|
that could not fit in the 128 bytes of the ICMP payload */
|
|
if (obj_trunc_length > 4)
|
|
proto_tree_add_text(mpls_object_tree, tvb,
|
|
offset, obj_trunc_length - 4,
|
|
"Data (%d bytes)", obj_trunc_length - 4);
|
|
|
|
break;
|
|
default:
|
|
|
|
unknown_object = TRUE;
|
|
|
|
break;
|
|
} /* end switch c_type */
|
|
break;
|
|
default:
|
|
|
|
unknown_object = TRUE;
|
|
|
|
break;
|
|
} /* end switch class_num */
|
|
|
|
/* The switches couldn't decode the object */
|
|
if (unknown_object == TRUE)
|
|
{
|
|
proto_item_set_text(tf_object, "Unknown object (%d/%d)", class_num, c_type);
|
|
|
|
if (obj_trunc_length > 4)
|
|
proto_tree_add_text(mpls_object_tree, tvb,
|
|
offset, obj_trunc_length - 4,
|
|
"Data (%d bytes)", obj_trunc_length - 4);
|
|
}
|
|
|
|
/* */
|
|
if (obj_trunc_length < obj_length)
|
|
proto_item_append_text(tf_object, " (truncated)");
|
|
|
|
/* Go to the end of the object */
|
|
offset = obj_end_offset;
|
|
|
|
} /* end while */
|
|
} /* end dissect_mpls_extensions */
|
|
|
|
/* ======================================================================= */
|
|
static icmp_transaction_t *transaction_start(packet_info *pinfo, proto_tree *tree, guint32 *key)
|
|
{
|
|
conversation_t *conversation;
|
|
icmp_conv_info_t *icmp_info;
|
|
icmp_transaction_t *icmp_trans;
|
|
emem_tree_key_t icmp_key[2];
|
|
proto_item *it;
|
|
|
|
/* Handle the conversation tracking */
|
|
conversation = _find_or_create_conversation(pinfo);
|
|
icmp_info = conversation_get_proto_data(conversation, proto_icmp);
|
|
if ( icmp_info == NULL )
|
|
{
|
|
icmp_info = se_alloc(sizeof(icmp_conv_info_t));
|
|
icmp_info->pdus = se_tree_create_non_persistent(
|
|
EMEM_TREE_TYPE_RED_BLACK, "icmp_pdus");
|
|
conversation_add_proto_data(conversation, proto_icmp, icmp_info);
|
|
}
|
|
|
|
icmp_key[0].length = 2;
|
|
icmp_key[0].key = key;
|
|
icmp_key[1].length = 0;
|
|
icmp_key[1].key = NULL;
|
|
if ( !PINFO_FD_VISITED(pinfo) )
|
|
{
|
|
icmp_trans = se_alloc(sizeof(icmp_transaction_t));
|
|
icmp_trans->rqst_frame = PINFO_FD_NUM(pinfo);
|
|
icmp_trans->resp_frame = 0;
|
|
icmp_trans->rqst_time = pinfo->fd->abs_ts;
|
|
icmp_trans->resp_time = 0.0;
|
|
se_tree_insert32_array(icmp_info->pdus, icmp_key, (void *)icmp_trans);
|
|
}
|
|
else /* Already visited this frame */
|
|
icmp_trans = se_tree_lookup32_array(icmp_info->pdus, icmp_key);
|
|
|
|
if ( icmp_trans == NULL )
|
|
return (NULL);
|
|
|
|
/* Print state tracking in the tree */
|
|
if ( icmp_trans->resp_frame &&
|
|
(icmp_trans->rqst_frame == PINFO_FD_NUM(pinfo)) )
|
|
{
|
|
it = proto_tree_add_uint(tree, hf_icmp_resp_in, NULL, 0, 0,
|
|
icmp_trans->resp_frame);
|
|
PROTO_ITEM_SET_GENERATED(it);
|
|
}
|
|
|
|
return (icmp_trans);
|
|
|
|
} /* transaction_start() */
|
|
|
|
/* ======================================================================= */
|
|
static icmp_transaction_t *transaction_end(packet_info *pinfo, proto_tree *tree, guint32 *key)
|
|
{
|
|
conversation_t *conversation;
|
|
icmp_conv_info_t *icmp_info;
|
|
icmp_transaction_t *icmp_trans;
|
|
emem_tree_key_t icmp_key[2];
|
|
proto_item *it;
|
|
nstime_t ns;
|
|
|
|
conversation = find_conversation(pinfo->fd->num, &pinfo->src, &pinfo->dst,
|
|
pinfo->ptype, 0, 0, 0);
|
|
if ( conversation == NULL )
|
|
return (NULL);
|
|
|
|
icmp_info = conversation_get_proto_data(conversation, proto_icmp);
|
|
if ( icmp_info == NULL )
|
|
return (NULL);
|
|
|
|
icmp_key[0].length = 2;
|
|
icmp_key[0].key = key;
|
|
icmp_key[1].length = 0;
|
|
icmp_key[1].key = NULL;
|
|
icmp_trans = se_tree_lookup32_array(icmp_info->pdus, icmp_key);
|
|
if ( icmp_trans == NULL )
|
|
return (NULL);
|
|
|
|
/* Print state tracking in the tree */
|
|
if ( icmp_trans->rqst_frame &&
|
|
(icmp_trans->rqst_frame < PINFO_FD_NUM(pinfo)) &&
|
|
((icmp_trans->resp_frame == 0) ||
|
|
(icmp_trans->resp_frame == PINFO_FD_NUM(pinfo))) )
|
|
{
|
|
icmp_trans->resp_frame = PINFO_FD_NUM(pinfo);
|
|
it = proto_tree_add_uint(tree, hf_icmp_resp_to, NULL, 0, 0,
|
|
icmp_trans->rqst_frame);
|
|
PROTO_ITEM_SET_GENERATED(it);
|
|
|
|
nstime_delta(&ns, &pinfo->fd->abs_ts, &icmp_trans->rqst_time);
|
|
icmp_trans->resp_time = nstime_to_msec(&ns);
|
|
it = proto_tree_add_double_format_value(tree, hf_icmp_resptime, NULL,
|
|
0, 0, icmp_trans->resp_time, "%.3f ms", icmp_trans->resp_time);
|
|
PROTO_ITEM_SET_GENERATED(it);
|
|
}
|
|
|
|
return (icmp_trans);
|
|
|
|
} /* transaction_end() */
|
|
|
|
/*
|
|
* RFC 792 for basic ICMP.
|
|
* RFC 1191 for ICMP_FRAG_NEEDED (with MTU of next hop).
|
|
* RFC 1256 for router discovery messages.
|
|
* RFC 2002 and 3012 for Mobile IP stuff.
|
|
*/
|
|
static void
|
|
dissect_icmp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
|
|
{
|
|
proto_tree *icmp_tree = NULL;
|
|
proto_item *ti;
|
|
guint8 icmp_type;
|
|
guint8 icmp_code;
|
|
guint length, reported_length;
|
|
guint16 cksum, computed_cksum;
|
|
const gchar *type_str, *code_str;
|
|
guint8 num_addrs = 0;
|
|
guint8 addr_entry_size = 0;
|
|
int i;
|
|
gboolean save_in_error_pkt;
|
|
tvbuff_t *next_tvb;
|
|
proto_item *item;
|
|
guint32 conv_key[2];
|
|
icmp_transaction_t *trans = NULL;
|
|
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "ICMP");
|
|
col_clear(pinfo->cinfo, COL_INFO);
|
|
|
|
/* To do: check for runts, errs, etc. */
|
|
icmp_type = tvb_get_guint8(tvb, 0);
|
|
icmp_code = tvb_get_guint8(tvb, 1);
|
|
cksum = tvb_get_ntohs(tvb, 2);
|
|
|
|
type_str = val_to_str_const (icmp_type, icmp_type_str, "Unknown ICMP (obsolete or malformed?)");
|
|
|
|
switch (icmp_type) {
|
|
case ICMP_UNREACH:
|
|
code_str = val_to_str (icmp_code, unreach_code_str, "Unknown code: %u");
|
|
break;
|
|
case ICMP_REDIRECT:
|
|
code_str = val_to_str (icmp_code, redir_code_str, "Unknown code: %u");
|
|
break;
|
|
case ICMP_ALTHOST:
|
|
code_str = val_to_str (icmp_code, alt_host_code_str, "Unknown code: %u");
|
|
break;
|
|
case ICMP_RTRADVERT:
|
|
switch (icmp_code) {
|
|
case 0: /* Mobile-Ip */
|
|
case 16: /* Mobile-Ip */
|
|
type_str = "Mobile IP Advertisement";
|
|
break;
|
|
} /* switch icmp_code */
|
|
code_str = val_to_str (icmp_code, rtradvert_code_str, "Unknown code: %u");
|
|
break;
|
|
case ICMP_TIMXCEED:
|
|
code_str = val_to_str (icmp_code, ttl_code_str, "Unknown code: %u");
|
|
break;
|
|
case ICMP_PARAMPROB:
|
|
code_str = val_to_str (icmp_code, par_code_str, "Unknown code: %u");
|
|
break;
|
|
case ICMP_PHOTURIS:
|
|
code_str = val_to_str (icmp_code, photuris_code_str, "Unknown code: %u");
|
|
break;
|
|
default:
|
|
code_str = NULL;
|
|
break;
|
|
}
|
|
|
|
col_add_fstr(pinfo->cinfo, COL_INFO, "%-20s", type_str);
|
|
if (code_str)
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " (%s)", code_str);
|
|
|
|
length = tvb_length(tvb);
|
|
reported_length = tvb_reported_length(tvb);
|
|
|
|
ti = proto_tree_add_item(tree, proto_icmp, tvb, 0, length, FALSE);
|
|
icmp_tree = proto_item_add_subtree(ti, ett_icmp);
|
|
|
|
ti = proto_tree_add_item(icmp_tree, hf_icmp_type, tvb, 0, 1, FALSE);
|
|
proto_item_append_text (ti, " (%s)", type_str);
|
|
|
|
ti = proto_tree_add_item(icmp_tree, hf_icmp_code, tvb, 1, 1, FALSE);
|
|
if (code_str)
|
|
proto_item_append_text (ti, " (%s)", code_str);
|
|
|
|
if (!pinfo->fragmented && length >= reported_length && !pinfo->in_error_pkt) {
|
|
/* The packet isn't part of a fragmented datagram, isn't
|
|
truncated, and isn't the payload of an error packet, so we can checksum
|
|
it. */
|
|
|
|
computed_cksum = ip_checksum(tvb_get_ptr(tvb, 0, reported_length),
|
|
reported_length);
|
|
if (computed_cksum == 0) {
|
|
proto_tree_add_uint_format(icmp_tree, hf_icmp_checksum, tvb, 2, 2,
|
|
cksum,
|
|
"Checksum: 0x%04x [correct]", cksum);
|
|
} else {
|
|
item = proto_tree_add_boolean(icmp_tree, hf_icmp_checksum_bad,
|
|
tvb, 2, 2, TRUE);
|
|
PROTO_ITEM_SET_HIDDEN(item);
|
|
proto_tree_add_uint_format(icmp_tree, hf_icmp_checksum, tvb, 2, 2,
|
|
cksum,
|
|
"Checksum: 0x%04x [incorrect, should be 0x%04x]",
|
|
cksum, in_cksum_shouldbe(cksum, computed_cksum));
|
|
}
|
|
} else {
|
|
proto_tree_add_uint(icmp_tree, hf_icmp_checksum, tvb, 2, 2, cksum);
|
|
}
|
|
|
|
/* Decode the second 4 bytes of the packet. */
|
|
switch (icmp_type) {
|
|
case ICMP_ECHOREPLY:
|
|
case ICMP_ECHO:
|
|
case ICMP_TSTAMP:
|
|
case ICMP_TSTAMPREPLY:
|
|
case ICMP_IREQ:
|
|
case ICMP_IREQREPLY:
|
|
case ICMP_MASKREQ:
|
|
case ICMP_MASKREPLY:
|
|
proto_tree_add_item(icmp_tree, hf_icmp_ident, tvb, 4, 2,
|
|
ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(icmp_tree, hf_icmp_ident_le, tvb, 4, 2,
|
|
ENC_LITTLE_ENDIAN);
|
|
proto_tree_add_item(icmp_tree, hf_icmp_seq_num, tvb, 6, 2,
|
|
ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(icmp_tree, hf_icmp_seq_num_le, tvb, 6, 2,
|
|
ENC_LITTLE_ENDIAN);
|
|
col_append_fstr(pinfo->cinfo, COL_INFO,
|
|
" id=0x%04x, seq=%u/%u, ttl=%u", tvb_get_ntohs(tvb, 4),
|
|
tvb_get_ntohs(tvb, 6), tvb_get_letohs(tvb, 6), pinfo->ip_ttl);
|
|
break;
|
|
|
|
case ICMP_UNREACH:
|
|
switch (icmp_code) {
|
|
case ICMP_FRAG_NEEDED:
|
|
proto_tree_add_item(icmp_tree, hf_icmp_mtu, tvb, 6, 2, FALSE);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case ICMP_RTRADVERT:
|
|
num_addrs = tvb_get_guint8(tvb, 4);
|
|
proto_tree_add_text(icmp_tree, tvb, 4, 1, "Number of addresses: %u",
|
|
num_addrs);
|
|
addr_entry_size = tvb_get_guint8(tvb, 5);
|
|
proto_tree_add_text(icmp_tree, tvb, 5, 1, "Address entry size: %u",
|
|
addr_entry_size);
|
|
proto_tree_add_text(icmp_tree, tvb, 6, 2, "Lifetime: %s",
|
|
time_secs_to_str(tvb_get_ntohs(tvb, 6)));
|
|
break;
|
|
|
|
case ICMP_PARAMPROB:
|
|
proto_tree_add_text(icmp_tree, tvb, 4, 1, "Pointer: %u",
|
|
tvb_get_guint8(tvb, 4));
|
|
break;
|
|
|
|
case ICMP_REDIRECT:
|
|
proto_tree_add_item(icmp_tree, hf_icmp_redir_gw, tvb, 4, 4, FALSE);
|
|
break;
|
|
}
|
|
|
|
/* Decode the additional information in the packet. */
|
|
switch (icmp_type) {
|
|
case ICMP_UNREACH:
|
|
case ICMP_TIMXCEED:
|
|
case ICMP_PARAMPROB:
|
|
case ICMP_SOURCEQUENCH:
|
|
case ICMP_REDIRECT:
|
|
/* Save the current value of the "we're inside an error packet"
|
|
flag, and set that flag; subdissectors may treat packets
|
|
that are the payload of error packets differently from
|
|
"real" packets. */
|
|
save_in_error_pkt = pinfo->in_error_pkt;
|
|
pinfo->in_error_pkt = TRUE;
|
|
|
|
/* Decode the IP header and first 64 bits of data from the
|
|
original datagram. */
|
|
next_tvb = tvb_new_subset_remaining(tvb, 8);
|
|
|
|
/* There is a collision between RFC 1812 and draft-ietf-mpls-icmp-02.
|
|
We don't know how to decode the 128th and following bytes of the ICMP payload.
|
|
According to draft-ietf-mpls-icmp-02, these bytes should be decoded as MPLS extensions
|
|
whereas RFC 1812 tells us to decode them as a portion of the original packet.
|
|
Let the user decide.
|
|
|
|
Here the user decided to favor MPLS extensions.
|
|
Force the IP dissector to decode only the first 128 bytes. */
|
|
if ((tvb_reported_length(tvb) > 8 + 128) &&
|
|
favor_icmp_mpls_ext && (tvb_get_ntohs(tvb, 8 + 2) > 128))
|
|
set_actual_length(next_tvb, 128);
|
|
|
|
call_dissector(ip_handle, next_tvb, pinfo, icmp_tree);
|
|
|
|
/* Restore the "we're inside an error packet" flag. */
|
|
pinfo->in_error_pkt = save_in_error_pkt;
|
|
|
|
/* Decode MPLS extensions if the payload has at least 128 bytes, and
|
|
- the original packet in the ICMP payload has less than 128 bytes, or
|
|
- the user favors the MPLS extensions analysis */
|
|
if ((tvb_reported_length(tvb) > 8 + 128)
|
|
&& (tvb_get_ntohs(tvb, 8 + 2) <= 128 || favor_icmp_mpls_ext))
|
|
dissect_mpls_extensions(tvb, 8 + 128, icmp_tree);
|
|
|
|
break;
|
|
|
|
case ICMP_ECHOREPLY:
|
|
if ( !pinfo->in_error_pkt ) {
|
|
conv_key[0] = (guint32)tvb_get_ntohs(tvb, 2);
|
|
conv_key[1] = (guint32)((tvb_get_ntohs(tvb, 4) << 16) |
|
|
tvb_get_ntohs(tvb, 6));
|
|
trans = transaction_end(pinfo, icmp_tree, conv_key);
|
|
}
|
|
call_dissector(data_handle, tvb_new_subset_remaining(tvb, 8), pinfo,
|
|
icmp_tree);
|
|
break;
|
|
|
|
case ICMP_ECHO:
|
|
if ( !pinfo->in_error_pkt ) {
|
|
guint16 tmp[2];
|
|
|
|
tmp[0] = ~tvb_get_ntohs(tvb, 2);
|
|
tmp[1] = ~0x0800; /* The difference between echo request & reply */
|
|
conv_key[0] = ip_checksum((guint8 *)&tmp, sizeof(tmp));
|
|
conv_key[1] = (guint32)((tvb_get_ntohs(tvb, 4) << 16) |
|
|
tvb_get_ntohs(tvb, 6));
|
|
trans = transaction_start(pinfo, icmp_tree, conv_key);
|
|
}
|
|
call_dissector(data_handle, tvb_new_subset_remaining(tvb, 8), pinfo,
|
|
icmp_tree);
|
|
break;
|
|
|
|
case ICMP_RTRADVERT:
|
|
if (addr_entry_size == 2) {
|
|
for (i = 0; i < num_addrs; i++) {
|
|
proto_tree_add_text(icmp_tree, tvb, 8 + (i*8), 4,
|
|
"Router address: %s", tvb_ip_to_str(tvb, 8 + (i*8)));
|
|
proto_tree_add_text(icmp_tree, tvb, 12 + (i*8), 4,
|
|
"Preference level: %d", tvb_get_ntohl(tvb, 12 + (i*8)));
|
|
}
|
|
if ((icmp_code == 0) || (icmp_code == 16)) {
|
|
/* Mobile-Ip */
|
|
dissect_mip_extensions(tvb, 8 + i*8, icmp_tree);
|
|
}
|
|
} else
|
|
call_dissector(data_handle, tvb_new_subset_remaining(tvb, 8), pinfo,
|
|
icmp_tree);
|
|
break;
|
|
|
|
case ICMP_TSTAMP:
|
|
case ICMP_TSTAMPREPLY:
|
|
proto_tree_add_text(icmp_tree, tvb, 8, 4, "Originate timestamp: %s after midnight UTC",
|
|
time_msecs_to_str(tvb_get_ntohl(tvb, 8)));
|
|
proto_tree_add_text(icmp_tree, tvb, 12, 4, "Receive timestamp: %s after midnight UTC",
|
|
time_msecs_to_str(tvb_get_ntohl(tvb, 12)));
|
|
proto_tree_add_text(icmp_tree, tvb, 16, 4, "Transmit timestamp: %s after midnight UTC",
|
|
time_msecs_to_str(tvb_get_ntohl(tvb, 16)));
|
|
break;
|
|
|
|
case ICMP_MASKREQ:
|
|
case ICMP_MASKREPLY:
|
|
proto_tree_add_text(icmp_tree, tvb, 8, 4, "Address mask: %s (0x%08x)",
|
|
tvb_ip_to_str(tvb, 8), tvb_get_ntohl(tvb, 8));
|
|
break;
|
|
}
|
|
|
|
if (trans)
|
|
tap_queue_packet(icmp_tap, pinfo, trans);
|
|
}
|
|
|
|
void
|
|
proto_register_icmp(void)
|
|
{
|
|
static hf_register_info hf[] = {
|
|
{ &hf_icmp_type,
|
|
{ "Type", "icmp.type", FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_icmp_code,
|
|
{ "Code", "icmp.code", FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_icmp_checksum,
|
|
{ "Checksum", "icmp.checksum", FT_UINT16, BASE_HEX, NULL, 0x0,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_icmp_checksum_bad,
|
|
{ "Bad Checksum", "icmp.checksum_bad", FT_BOOLEAN, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_icmp_ident,
|
|
{ "Identifier (BE)", "icmp.ident", FT_UINT16, BASE_DEC_HEX, NULL, 0x0,
|
|
"Identifier (big endian representation)", HFILL }},
|
|
|
|
{ &hf_icmp_ident_le,
|
|
{ "Identifier (LE)", "icmp.ident", FT_UINT16, BASE_DEC_HEX, NULL, 0x0,
|
|
"Identifier (little endian representation)", HFILL }},
|
|
|
|
{ &hf_icmp_seq_num,
|
|
{ "Sequence number (BE)", "icmp.seq", FT_UINT16, BASE_DEC_HEX, NULL, 0x0, "Sequence number (big endian representation)", HFILL }},
|
|
|
|
{ &hf_icmp_seq_num_le,
|
|
{"Sequence number (LE)", "icmp.seq_le", FT_UINT16, BASE_DEC_HEX, NULL, 0x0, "Sequence number (little endian representation)", HFILL }},
|
|
|
|
{ &hf_icmp_mtu,
|
|
{ "MTU of next hop", "icmp.mtu", FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL}},
|
|
|
|
{ &hf_icmp_redir_gw,
|
|
{ "Gateway address", "icmp.redir_gw", FT_IPv4, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_icmp_mip_type,
|
|
{ "Extension Type", "icmp.mip.type", FT_UINT8, BASE_DEC,
|
|
VALS(mip_extensions), 0x0,NULL, HFILL}},
|
|
|
|
{ &hf_icmp_mip_length,
|
|
{ "Length", "icmp.mip.length", FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL}},
|
|
|
|
{ &hf_icmp_mip_prefix_length,
|
|
{ "Prefix Length", "icmp.mip.prefixlength", FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL}},
|
|
|
|
{ &hf_icmp_mip_seq,
|
|
{ "Sequence Number", "icmp.mip.seq", FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL}},
|
|
|
|
{ &hf_icmp_mip_life,
|
|
{ "Registration Lifetime", "icmp.mip.life", FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL}},
|
|
|
|
{ &hf_icmp_mip_flags,
|
|
{ "Flags", "icmp.mip.flags", FT_UINT16, BASE_HEX, NULL, 0x0,
|
|
NULL, HFILL}},
|
|
|
|
{ &hf_icmp_mip_r,
|
|
{ "Registration Required", "icmp.mip.r", FT_BOOLEAN, 16, NULL, 0x8000,
|
|
"Registration with this FA is required", HFILL }},
|
|
|
|
{ &hf_icmp_mip_b,
|
|
{ "Busy", "icmp.mip.b", FT_BOOLEAN, 16, NULL, 0x4000,
|
|
"This FA will not accept requests at this time", HFILL }},
|
|
|
|
{ &hf_icmp_mip_h,
|
|
{ "Home Agent", "icmp.mip.h", FT_BOOLEAN, 16, NULL, 0x2000,
|
|
"Home Agent Services Offered", HFILL }},
|
|
|
|
{ &hf_icmp_mip_f,
|
|
{ "Foreign Agent", "icmp.mip.f", FT_BOOLEAN, 16, NULL, 0x1000,
|
|
"Foreign Agent Services Offered", HFILL }},
|
|
|
|
{ &hf_icmp_mip_m,
|
|
{ "Minimal Encapsulation", "icmp.mip.m", FT_BOOLEAN, 16, NULL, 0x0800,
|
|
"Minimal encapsulation tunneled datagram support", HFILL }},
|
|
|
|
{ &hf_icmp_mip_g,
|
|
{ "GRE", "icmp.mip.g", FT_BOOLEAN, 16, NULL, 0x0400,
|
|
"GRE encapsulated tunneled datagram support", HFILL }},
|
|
|
|
{ &hf_icmp_mip_v,
|
|
{ "VJ Comp", "icmp.mip.v", FT_BOOLEAN, 16, NULL, 0x0200,
|
|
"Van Jacobson Header Compression Support", HFILL }},
|
|
|
|
{ &hf_icmp_mip_rt,
|
|
{ "Reverse tunneling", "icmp.mip.rt", FT_BOOLEAN, 16, NULL, 0x0100,
|
|
"Reverse tunneling support", HFILL }},
|
|
|
|
{ &hf_icmp_mip_u,
|
|
{ "UDP tunneling", "icmp.mip.u", FT_BOOLEAN, 16, NULL, 0x0080,
|
|
"UDP tunneling support", HFILL }},
|
|
|
|
{ &hf_icmp_mip_x,
|
|
{ "Revocation support", "icmp.mip.x", FT_BOOLEAN, 16, NULL, 0x0040,
|
|
"Registration revocation support", HFILL }},
|
|
|
|
{ &hf_icmp_mip_reserved,
|
|
{ "Reserved", "icmp.mip.reserved", FT_UINT16, BASE_HEX, NULL, 0x003f,
|
|
NULL, HFILL}},
|
|
|
|
{ &hf_icmp_mip_coa,
|
|
{ "Care-Of-Address", "icmp.mip.coa", FT_IPv4, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL}},
|
|
|
|
{ &hf_icmp_mip_challenge,
|
|
{ "Challenge", "icmp.mip.challenge", FT_BYTES, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL}},
|
|
|
|
{ &hf_icmp_mpls,
|
|
{ "ICMP Extensions for MPLS", "icmp.mpls", FT_NONE, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_icmp_mpls_version,
|
|
{ "Version", "icmp.mpls.version", FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_icmp_mpls_reserved,
|
|
{ "Reserved", "icmp.mpls.res", FT_UINT16, BASE_HEX, NULL, 0x0,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_icmp_mpls_checksum,
|
|
{ "Checksum", "icmp.mpls.checksum", FT_UINT16, BASE_HEX, NULL, 0x0,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_icmp_mpls_checksum_bad,
|
|
{ "Bad Checksum", "icmp.mpls.checksum_bad", FT_BOOLEAN, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_icmp_mpls_length,
|
|
{ "Length", "icmp.mpls.length", FT_UINT16, BASE_HEX, NULL, 0x0,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_icmp_mpls_class,
|
|
{ "Class", "icmp.mpls.class", FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_icmp_mpls_c_type,
|
|
{ "C-Type", "icmp.mpls.ctype", FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_icmp_mpls_label,
|
|
{ "Label", "icmp.mpls.label", FT_UINT24, BASE_DEC, NULL, 0x00fffff0,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_icmp_mpls_exp,
|
|
{ "Experimental", "icmp.mpls.exp", FT_UINT24, BASE_DEC, NULL, 0x0e,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_icmp_mpls_s,
|
|
{ "Stack bit", "icmp.mpls.s", FT_BOOLEAN, 24, TFS(&tfs_set_notset), 0x01,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_icmp_mpls_ttl,
|
|
{ "Time to live", "icmp.mpls.ttl", FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_icmp_resp_in,
|
|
{ "Response In", "icmp.resp_in", FT_FRAMENUM, BASE_NONE, NULL, 0x0,
|
|
"The response to this request is in this frame", HFILL }},
|
|
|
|
{ &hf_icmp_resp_to,
|
|
{ "Response To", "icmp.resp_to", FT_FRAMENUM, BASE_NONE, NULL, 0x0,
|
|
"This is the response to the request in this frame", HFILL }},
|
|
|
|
{ &hf_icmp_resptime,
|
|
{ "Response Time", "icmp.resptime", FT_DOUBLE, BASE_NONE, NULL, 0x0,
|
|
"The time between the request and the response, in ms.", HFILL }}
|
|
};
|
|
|
|
static gint *ett[] = {
|
|
&ett_icmp,
|
|
&ett_icmp_mip,
|
|
&ett_icmp_mip_flags,
|
|
/* MPLS extensions */
|
|
&ett_icmp_mpls,
|
|
&ett_icmp_mpls_object,
|
|
&ett_icmp_mpls_stack_object
|
|
};
|
|
|
|
module_t *icmp_module;
|
|
|
|
proto_icmp = proto_register_protocol("Internet Control Message Protocol",
|
|
"ICMP", "icmp");
|
|
proto_register_field_array(proto_icmp, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
|
|
icmp_module = prefs_register_protocol(proto_icmp, NULL);
|
|
|
|
prefs_register_bool_preference(icmp_module, "favor_icmp_mpls",
|
|
"Favor ICMP extensions for MPLS",
|
|
"Whether the 128th and following bytes of the ICMP payload should be decoded as MPLS extensions or as a portion of the original packet",
|
|
&favor_icmp_mpls_ext);
|
|
|
|
register_dissector("icmp", dissect_icmp, proto_icmp);
|
|
icmp_tap = register_tap("icmp");
|
|
}
|
|
|
|
void
|
|
proto_reg_handoff_icmp(void)
|
|
{
|
|
dissector_handle_t icmp_handle;
|
|
|
|
/*
|
|
* Get handle for the IP dissector.
|
|
*/
|
|
ip_handle = find_dissector("ip");
|
|
icmp_handle = find_dissector("icmp");
|
|
data_handle = find_dissector("data");
|
|
|
|
dissector_add_uint("ip.proto", IP_PROTO_ICMP, icmp_handle);
|
|
}
|