forked from osmocom/wireshark
![Jörg Mayer](/assets/img/avatar_default.png)
packet-ntp.c: Rather confused and incorrect use of g_snprintf return value packet-pim.c: whitespace change packet-icmpv6.c: g_snprintf takes trailing \0 into account, fix off by 1 error packet-clnp.c: Fix incorrect use of g_snprintf return value packet-isakmp.c: g_snprintf takes trailing \0 into account packet-tr.c: Fix incorrect use of g_snprintf return value packet-radius.c: Fix incorrect use of g_snprintf return value packet-radius.h: constify a string variable packet-ldap.c: The return value isn't needed, so don't use it incorrectly packet-tcp.c: Fix incorrect use of g_snprintf return value packet-windows-common.c: Remove unneeded DISSECTOR_ASSERT packet-smb-sidsnooping.c: g_snprintf takes trailing \0 into account packet-pvfs2.c: g_snprintf takes trailing \0 into account packet-ptp.c: Remove #include snprintf packet-ppp.c: Fix incorrect use of g_snprintf return value packet-ospf.c: Fix incorrect use of g_snprintf return value packet-mip6.c: snprintf -> g_snprintf packet-bootp.c: Remove a commented out bad use of g_snprintf packet-ber.c: snprintf -> g_snprintf, g_snprintf takes trailing \0 into account 2do: 52 packet-ieee80211.c: 2DO 2 packet-nfs.c: 2DO - too many side effects 33 packet-bgp.c: 2DO 18 packet-dns.c: 2DO 14 packet-dcm.c: 2DO 13 packet-x11.c: 2DO 11 packet-kerberos.c: 2DO 10 packet-diameter.c: 2DO 9 packet-snmp.c: 2DO 9 packet-pgm.c: 2DO 7 packet-nbns.c: 2DO 6 packet-fcswils.c: 2DO 5 packet-wccp.c: 2DO 5 packet-cops.c: 2DO 4 packet-wtp.c: 2DO svn path=/trunk/; revision=17038
2736 lines
94 KiB
C
2736 lines
94 KiB
C
/* packet-ospf.c
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* Routines for OSPF packet disassembly
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* (c) Copyright Hannes R. Boehm <hannes@boehm.org>
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*
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* $Id$
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*
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* Added support for OSPF restart signaling:
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* draft-nguyen-ospf-lls-05.txt
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* draft-nguyen-ospf-oob-resync-05.txt
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* draft-nguyen-ospf-restart-05.txt
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* - (c) 2005 Michael Rozhavsky <mrozhavsky@fortinet.com>
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*
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* At this time, this module is able to analyze OSPF
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* packets as specified in RFC2328. MOSPF (RFC1584) and other
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* OSPF Extensions which introduce new Packet types
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* (e.g the External Atributes LSA) are not supported.
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* Furthermore RFC2740 (OSPFv3 - OSPF for IPv6) is now supported
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* - (c) 2001 Palle Lyckegaard <palle[AT]lyckegaard.dk>
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*
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* Added support to E-NNI routing (OIF2003.259.02)
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* - (c) 2004 Roberto Morro <roberto.morro[AT]tilab.com>
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* TOS - support is not fully implemented
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@ethereal.com>
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* Copyright 1998 Gerald Combs
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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 <stdio.h>
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#include <string.h>
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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/in_cksum.h>
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#include <epan/emem.h>
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#include "packet-rsvp.h"
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#define OSPF_VERSION_2 2
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#define OSPF_VERSION_3 3
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#define OSPF_VERSION_2_HEADER_LENGTH 24
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#define OSPF_VERSION_3_HEADER_LENGTH 16
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#define OSPF_HELLO 1
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#define OSPF_DB_DESC 2
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#define OSPF_LS_REQ 3
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#define OSPF_LS_UPD 4
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#define OSPF_LS_ACK 5
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static const value_string pt_vals[] = {
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{OSPF_HELLO, "Hello Packet" },
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{OSPF_DB_DESC, "DB Descr." },
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{OSPF_LS_REQ, "LS Request" },
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{OSPF_LS_UPD, "LS Update" },
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{OSPF_LS_ACK, "LS Acknowledge" },
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{0, NULL }
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};
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#define OSPF_AUTH_NONE 0
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#define OSPF_AUTH_SIMPLE 1
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#define OSPF_AUTH_CRYPT 2
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static const value_string auth_vals[] = {
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{OSPF_AUTH_NONE, "Null" },
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{OSPF_AUTH_SIMPLE, "Simple password" },
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{OSPF_AUTH_CRYPT, "Cryptographic" },
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{0, NULL }
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};
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#define OSPF_V2_OPTIONS_E 0x02
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#define OSPF_V2_OPTIONS_MC 0x04
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#define OSPF_V2_OPTIONS_NP 0x08
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#define OSPF_V2_OPTIONS_L 0x10
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#define OSPF_V2_OPTIONS_DC 0x20
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#define OSPF_V2_OPTIONS_O 0x40
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#define OSPF_V2_OPTIONS_DN 0x80
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#define OSPF_V3_OPTIONS_V6 0x01
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#define OSPF_V3_OPTIONS_E 0x02
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#define OSPF_V3_OPTIONS_MC 0x04
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#define OSPF_V3_OPTIONS_N 0x08
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#define OSPF_V3_OPTIONS_R 0x10
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#define OSPF_V3_OPTIONS_DC 0x20
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#define OSPF_LLS_EXT_OPTIONS_LR 0x00000001
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#define OSPF_LLS_EXT_OPTIONS_RS 0x00000002
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#define OSPF_DBD_FLAG_MS 1
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#define OSPF_DBD_FLAG_M 2
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#define OSPF_DBD_FLAG_I 4
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#define OSPF_DBD_FLAG_R 8
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#define OSPF_LS_REQ_LENGTH 12
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#define OSPF_LSTYPE_ROUTER 1
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#define OSPF_LSTYPE_NETWORK 2
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#define OSPF_LSTYPE_SUMMERY 3
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#define OSPF_LSTYPE_ASBR 4
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#define OSPF_LSTYPE_ASEXT 5
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#define OSPF_LSTYPE_GRPMEMBER 6
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#define OSPF_LSTYPE_ASEXT7 7
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#define OSPF_LSTYPE_EXTATTR 8
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#define OSPF_V3_LSTYPE_ROUTER 0x2001
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#define OSPF_V3_LSTYPE_NETWORK 0x2002
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#define OSPF_V3_LSTYPE_INTER_AREA_PREFIX 0x2003
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#define OSPF_V3_LSTYPE_INTER_AREA_ROUTER 0x2004
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#define OSPF_V3_LSTYPE_AS_EXTERNAL 0x4005
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#define OSPF_V3_LSTYPE_GROUP_MEMBERSHIP 0x2006
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#define OSPF_V3_LSTYPE_TYPE_7 0x2007
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#define OSPF_V3_LSTYPE_LINK 0x0008
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#define OSPF_V3_LSTYPE_INTRA_AREA_PREFIX 0x2009
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/* Opaque LSA types */
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#define OSPF_LSTYPE_OP_LINKLOCAL 9
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#define OSPF_LSTYPE_OP_AREALOCAL 10
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#define OSPF_LSTYPE_OP_ASWIDE 11
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#define OSPF_LINK_PTP 1
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#define OSPF_LINK_TRANSIT 2
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#define OSPF_LINK_STUB 3
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#define OSPF_LINK_VIRTUAL 4
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#define OSPF_V3_LINK_PTP 1
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#define OSPF_V3_LINK_TRANSIT 2
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#define OSPF_V3_LINK_RESERVED 3
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#define OSPF_V3_LINK_VIRTUAL 4
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#define OSPF_LSA_HEADER_LENGTH 20
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/* Known opaque LSAs */
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#define OSPF_LSA_MPLS_TE 1
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static const value_string ls_type_vals[] = {
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{OSPF_LSTYPE_ROUTER, "Router-LSA" },
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{OSPF_LSTYPE_NETWORK, "Network-LSA" },
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{OSPF_LSTYPE_SUMMERY, "Summary-LSA (IP network)" },
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{OSPF_LSTYPE_ASBR, "Summary-LSA (ASBR)" },
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{OSPF_LSTYPE_ASEXT, "AS-External-LSA (ASBR)" },
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{OSPF_LSTYPE_GRPMEMBER, "Group Membership LSA" },
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{OSPF_LSTYPE_ASEXT7, "NSSA AS-External-LSA" },
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{OSPF_LSTYPE_EXTATTR, "External Attributes LSA" },
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{OSPF_LSTYPE_OP_LINKLOCAL, "Opaque LSA, Link-local scope" },
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{OSPF_LSTYPE_OP_AREALOCAL, "Opaque LSA, Area-local scope" },
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{0, NULL }
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};
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static const value_string ls_opaque_type_vals[] = {
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{OSPF_LSA_MPLS_TE, "Traffic Engineering LSA" },
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{2, "Sycamore Optical Topology Descriptions" },
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{3, "grace-LSA" },
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{0, NULL }
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};
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static const value_string v3_ls_type_vals[] = {
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{OSPF_V3_LSTYPE_ROUTER, "Router-LSA" },
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{OSPF_V3_LSTYPE_NETWORK, "Network-LSA" },
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{OSPF_V3_LSTYPE_INTER_AREA_PREFIX, "Inter-Area-Prefix-LSA" },
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{OSPF_V3_LSTYPE_INTER_AREA_ROUTER, "Inter-Area-Router-LSA" },
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{OSPF_V3_LSTYPE_AS_EXTERNAL, "AS-External-LSA" },
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{OSPF_V3_LSTYPE_GROUP_MEMBERSHIP, "Group-Membership-LSA" },
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{OSPF_V3_LSTYPE_TYPE_7, "Type-LSA" },
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{OSPF_V3_LSTYPE_LINK, "Link-LSA" },
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{OSPF_V3_LSTYPE_INTRA_AREA_PREFIX, "Intra-Area-Prefix-LSA" },
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{0, NULL }
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};
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static const value_string lls_tlv_type_vals[] = {
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{1, "Extended options TLV" },
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{2, "Crypo Authentication TLV" },
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{0, NULL },
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};
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static const value_string mpls_link_stlv_ltype_str[] = {
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{1, "Point-to-point"},
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{2, "Multi-access"},
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{0, NULL},
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};
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#define OSPF_V2_ROUTER_LSA_FLAG_B 0x01
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#define OSPF_V2_ROUTER_LSA_FLAG_E 0x02
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#define OSPF_V2_ROUTER_LSA_FLAG_V 0x04
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#define OSPF_V3_ROUTER_LSA_FLAG_B 0x01
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#define OSPF_V3_ROUTER_LSA_FLAG_E 0x02
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#define OSPF_V3_ROUTER_LSA_FLAG_V 0x04
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#define OSPF_V3_ROUTER_LSA_FLAG_W 0x08
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#define OSPF_V3_PREFIX_OPTION_NU 0x01
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#define OSPF_V3_PREFIX_OPTION_LA 0x02
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#define OSPF_V3_PREFIX_OPTION_MC 0x04
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#define OSPF_V3_PREFIX_OPTION_P 0x08
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#define OSPF_V3_AS_EXTERNAL_FLAG_T 0x01
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#define OSPF_V3_AS_EXTERNAL_FLAG_F 0x02
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#define OSPF_V3_AS_EXTERNAL_FLAG_E 0x04
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static int proto_ospf = -1;
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static gint ett_ospf = -1;
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static gint ett_ospf_hdr = -1;
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static gint ett_ospf_hello = -1;
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static gint ett_ospf_desc = -1;
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static gint ett_ospf_lsr = -1;
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static gint ett_ospf_lsa = -1;
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static gint ett_ospf_lsa_router_link = -1;
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static gint ett_ospf_lsa_upd = -1;
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static gint ett_ospf_v2_options = -1;
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static gint ett_ospf_v3_options = -1;
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static gint ett_ospf_dbd = -1;
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static gint ett_ospf_lls_data_block = -1;
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static gint ett_ospf_lls_tlv = -1;
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static gint ett_ospf_lls_ext_options = -1;
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static gint ett_ospf_v2_router_lsa_flags = -1;
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static gint ett_ospf_v3_router_lsa_flags = -1;
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static gint ett_ospf_v3_as_external_flags = -1;
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static gint ett_ospf_v3_prefix_options = -1;
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/* Trees for opaque LSAs */
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static gint ett_ospf_lsa_mpls = -1;
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static gint ett_ospf_lsa_mpls_router = -1;
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static gint ett_ospf_lsa_mpls_link = -1;
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static gint ett_ospf_lsa_mpls_link_stlv = -1;
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static gint ett_ospf_lsa_mpls_link_stlv_admingrp = -1;
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static gint ett_ospf_lsa_oif_tna = -1;
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static gint ett_ospf_lsa_oif_tna_stlv = -1;
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static const true_false_string tfs_v2_options_dc = {
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"Demand Circuits are supported",
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"Demand circuits are NOT supported"
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};
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static const true_false_string tfs_v2_options_l = {
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"The packet contains LLS data block",
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"The packet does NOT contain LLS data block"
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};
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static const true_false_string tfs_v2_options_np = {
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"NSSA is supported",
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"Nssa is NOT supported"
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};
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static const true_false_string tfs_v2_options_mc = {
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"Multicast Capable",
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"NOT multicast capable"
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};
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static const true_false_string tfs_v2_options_e = {
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"ExternalRoutingCapability",
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"NO ExternalRoutingCapability"
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};
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static const true_false_string tfs_v2_options_o = {
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"O-bit is SET",
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"O-bit is NOT set"
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};
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static const true_false_string tfs_v2_options_dn = {
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"DN-bit is SET",
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"DN-bit is NOT set"
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};
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static const true_false_string tfs_v3_options_v6 = {
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"V6 is SET",
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"V6 is NOT set"
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};
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static const true_false_string tfs_v3_options_e = {
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"E is SET",
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"E is NOT set"
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};
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static const true_false_string tfs_v3_options_mc = {
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"MC is SET",
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"MC is NOT set"
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};
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static const true_false_string tfs_v3_options_n = {
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"N is SET",
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"N is NOT set"
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};
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static const true_false_string tfs_v3_options_r = {
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"R is SET",
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"R is NOT set"
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};
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static const true_false_string tfs_v3_options_dc = {
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"DC is SET",
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"DC is NOT set"
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};
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static const true_false_string tfs_dbd_i = {
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"Init bit is SET",
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"Init bit is NOT set"
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};
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static const true_false_string tfs_dbd_m = {
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"More bit is SET",
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"More bit is NOT set"
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};
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static const true_false_string tfs_dbd_ms = {
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"Master/Slave bit is SET",
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"Master/Slave bit is NOT set"
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};
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static const true_false_string tfs_dbd_r = {
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"OOBResync bit is SET",
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"OOBResync bit is NOT set"
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};
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static const true_false_string tfs_lls_ext_options_lr = {
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"LSDB Resynchrinization (LR-bit) is SET",
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"LSDB Resynchrinization (LR-bit) is NOT set"
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};
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static const true_false_string tfs_lls_ext_options_rs = {
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"Restart Signal (RS-bit) is SET",
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"Restart Signal (RS-bit) is NOT set"
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};
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static const true_false_string tfs_v2_router_lsa_flags_b = {
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"Area border router",
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"NO Area border router"
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};
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static const true_false_string tfs_v2_router_lsa_flags_e = {
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"AS boundary router",
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"NO AS boundary router"
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};
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static const true_false_string tfs_v2_router_lsa_flags_v = {
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"Virtual link endpoint",
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"NO Virtual link endpoint"
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};
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static const true_false_string tfs_v3_router_lsa_flags_b = {
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"Area border router",
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"NO Area border router"
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};
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static const true_false_string tfs_v3_router_lsa_flags_e = {
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"AS boundary router",
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"NO AS boundary router"
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};
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static const true_false_string tfs_v3_router_lsa_flags_v = {
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"Virtual link endpoint",
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"NO Virtual link endpoint"
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};
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static const true_false_string tfs_v3_router_lsa_flags_w = {
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"Wild-card multicast receiver",
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"NO Wild-card multicast receiver"
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};
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static const true_false_string tfs_v3_as_external_flags_t = {
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"External Route Tag is included",
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"External Route Tag is NOT included"
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};
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static const true_false_string tfs_v3_as_external_flags_f = {
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"Forwarding Address is included",
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"Forwarding Address is NOT included"
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};
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static const true_false_string tfs_v3_as_external_flags_e = {
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"Type 2 external metric",
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"Type 1 external metric"
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};
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static const true_false_string tfs_v3_prefix_options_nu = {
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"NoUnicast capability bit is SET",
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"NoUnicast capability bit is NOT set"
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};
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static const true_false_string tfs_v3_prefix_options_la = {
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"LocalAddress capability bit is SET",
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"LocalAddress capability bit is NOT set"
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};
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static const true_false_string tfs_v3_prefix_options_mc = {
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"Multicast capability bit is SET",
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"Multicast capability bit is NOT set"
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};
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static const true_false_string tfs_v3_prefix_options_p = {
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"Propagate bit is SET",
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"Propagate bit is NOT set"
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};
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/*-----------------------------------------------------------------------
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* OSPF Filtering
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*-----------------------------------------------------------------------*/
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/* The OSPF filtering keys */
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enum {
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OSPFF_MSG_TYPE,
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OSPFF_MSG_MIN,
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OSPFF_MSG_HELLO,
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OSPFF_MSG_DB_DESC,
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OSPFF_MSG_LS_REQ,
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OSPFF_MSG_LS_UPD,
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OSPFF_MSG_LS_ACK,
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OSPFF_LS_TYPE,
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OSPFF_LS_OPAQUE_TYPE,
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OSPFF_LS_MPLS_TE_INSTANCE,
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OSPFF_LS_MIN,
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OSPFF_LS_ROUTER,
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OSPFF_LS_NETWORK,
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OSPFF_LS_SUMMARY,
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OSPFF_LS_ASBR,
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OSPFF_LS_ASEXT,
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OSPFF_LS_GRPMEMBER,
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OSPFF_LS_ASEXT7,
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OSPFF_LS_EXTATTR,
|
|
OSPFF_LS_OPAQUE,
|
|
|
|
OSPFF_SRC_ROUTER,
|
|
OSPFF_ADV_ROUTER,
|
|
OSPFF_LS_MPLS,
|
|
OSPFF_LS_MPLS_ROUTERID,
|
|
|
|
OSPFF_LS_MPLS_LINKTYPE,
|
|
OSPFF_LS_MPLS_LINKID,
|
|
OSPFF_LS_MPLS_LOCAL_ADDR,
|
|
OSPFF_LS_MPLS_REMOTE_ADDR,
|
|
OSPFF_LS_MPLS_LOCAL_IFID,
|
|
OSPFF_LS_MPLS_REMOTE_IFID,
|
|
OSPFF_LS_MPLS_LINKCOLOR,
|
|
|
|
OSPFF_V2_OPTIONS,
|
|
OSPFF_V2_OPTIONS_E,
|
|
OSPFF_V2_OPTIONS_MC,
|
|
OSPFF_V2_OPTIONS_NP,
|
|
OSPFF_V2_OPTIONS_L,
|
|
OSPFF_V2_OPTIONS_DC,
|
|
OSPFF_V2_OPTIONS_O,
|
|
OSPFF_V2_OPTIONS_DN,
|
|
OSPFF_V3_OPTIONS,
|
|
OSPFF_V3_OPTIONS_V6,
|
|
OSPFF_V3_OPTIONS_E,
|
|
OSPFF_V3_OPTIONS_MC,
|
|
OSPFF_V3_OPTIONS_N,
|
|
OSPFF_V3_OPTIONS_R,
|
|
OSPFF_V3_OPTIONS_DC,
|
|
OSPFF_DBD,
|
|
OSPFF_DBD_R,
|
|
OSPFF_DBD_I,
|
|
OSPFF_DBD_M,
|
|
OSPFF_DBD_MS,
|
|
OSPFF_LLS_EXT_OPTIONS,
|
|
OSPFF_LLS_EXT_OPTIONS_LR,
|
|
OSPFF_LLS_EXT_OPTIONS_RS,
|
|
OSPFF_V2_ROUTER_LSA_FLAG,
|
|
OSPFF_V2_ROUTER_LSA_FLAG_B,
|
|
OSPFF_V2_ROUTER_LSA_FLAG_E,
|
|
OSPFF_V2_ROUTER_LSA_FLAG_V,
|
|
OSPFF_V3_ROUTER_LSA_FLAG,
|
|
OSPFF_V3_ROUTER_LSA_FLAG_B,
|
|
OSPFF_V3_ROUTER_LSA_FLAG_E,
|
|
OSPFF_V3_ROUTER_LSA_FLAG_V,
|
|
OSPFF_V3_ROUTER_LSA_FLAG_W,
|
|
OSPFF_V3_AS_EXTERNAL_FLAG,
|
|
OSPFF_V3_AS_EXTERNAL_FLAG_T,
|
|
OSPFF_V3_AS_EXTERNAL_FLAG_F,
|
|
OSPFF_V3_AS_EXTERNAL_FLAG_E,
|
|
OSPFF_V3_PREFIX_OPTION,
|
|
OSPFF_V3_PREFIX_OPTION_NU,
|
|
OSPFF_V3_PREFIX_OPTION_LA,
|
|
OSPFF_V3_PREFIX_OPTION_MC,
|
|
OSPFF_V3_PREFIX_OPTION_P,
|
|
|
|
OSPFF_MAX
|
|
};
|
|
|
|
static int ospf_filter[OSPFF_MAX];
|
|
|
|
static hf_register_info ospff_info[] = {
|
|
|
|
/* Message type number */
|
|
{&ospf_filter[OSPFF_MSG_TYPE],
|
|
{ "Message Type", "ospf.msg", FT_UINT8, BASE_DEC, VALS(pt_vals), 0x0,
|
|
"", HFILL }},
|
|
|
|
/* Message types */
|
|
{&ospf_filter[OSPFF_MSG_HELLO],
|
|
{ "Hello", "ospf.msg.hello", FT_BOOLEAN, BASE_NONE, NULL, 0x0,
|
|
"", HFILL }},
|
|
{&ospf_filter[OSPFF_MSG_DB_DESC],
|
|
{ "Database Description", "ospf.msg.dbdesc", FT_BOOLEAN, BASE_NONE, NULL, 0x0,
|
|
"", HFILL }},
|
|
{&ospf_filter[OSPFF_MSG_LS_REQ],
|
|
{ "Link State Adv Request", "ospf.msg.lsreq", FT_BOOLEAN, BASE_NONE, NULL, 0x0,
|
|
"", HFILL }},
|
|
{&ospf_filter[OSPFF_MSG_LS_UPD],
|
|
{ "Link State Adv Update", "ospf.msg.lsupdate", FT_BOOLEAN, BASE_NONE, NULL, 0x0,
|
|
"", HFILL }},
|
|
{&ospf_filter[OSPFF_MSG_LS_ACK],
|
|
{ "Link State Adv Acknowledgement", "ospf.msg.lsack", FT_BOOLEAN,
|
|
BASE_NONE, NULL, 0x0, "", HFILL }},
|
|
|
|
|
|
|
|
/* LS Types */
|
|
{&ospf_filter[OSPFF_LS_TYPE],
|
|
{ "Link-State Advertisement Type", "ospf.lsa", FT_UINT8, BASE_DEC,
|
|
VALS(ls_type_vals), 0x0, "", HFILL }},
|
|
{&ospf_filter[OSPFF_LS_OPAQUE_TYPE],
|
|
{ "Link State ID Opaque Type", "ospf.lsid_opaque_type", FT_UINT8, BASE_DEC,
|
|
VALS(ls_opaque_type_vals), 0x0, "", HFILL }},
|
|
|
|
{&ospf_filter[OSPFF_LS_MPLS_TE_INSTANCE],
|
|
{ "Link State ID TE-LSA Instance", "ospf.lsid_te_lsa.instance", FT_UINT16, BASE_DEC,
|
|
NULL, 0x0, "", HFILL }},
|
|
|
|
{&ospf_filter[OSPFF_LS_ROUTER],
|
|
{ "Router LSA", "ospf.lsa.router", FT_BOOLEAN, BASE_NONE, NULL, 0x0,
|
|
"", HFILL }},
|
|
{&ospf_filter[OSPFF_LS_NETWORK],
|
|
{ "Network LSA", "ospf.lsa.network", FT_BOOLEAN, BASE_NONE, NULL, 0x0,
|
|
"", HFILL }},
|
|
{&ospf_filter[OSPFF_LS_SUMMARY],
|
|
{ "Summary LSA (IP Network)", "ospf.lsa.summary", FT_BOOLEAN, BASE_NONE,
|
|
NULL, 0x0, "", HFILL }},
|
|
{&ospf_filter[OSPFF_LS_ASBR],
|
|
{ "Summary LSA (ASBR)", "ospf.lsa.asbr", FT_BOOLEAN, BASE_NONE, NULL, 0x0,
|
|
"", HFILL }},
|
|
{&ospf_filter[OSPFF_LS_ASEXT],
|
|
{ "AS-External LSA (ASBR)", "ospf.lsa.asext", FT_BOOLEAN, BASE_NONE, NULL, 0x0,
|
|
"", HFILL }},
|
|
{&ospf_filter[OSPFF_LS_GRPMEMBER],
|
|
{ "Group Membership LSA", "ospf.lsa.member", FT_BOOLEAN, BASE_NONE, NULL, 0x0,
|
|
"", HFILL }},
|
|
{&ospf_filter[OSPFF_LS_ASEXT7],
|
|
{ "NSSA AS-External LSA", "ospf.lsa.nssa", FT_BOOLEAN, BASE_NONE, NULL, 0x0,
|
|
"", HFILL }},
|
|
{&ospf_filter[OSPFF_LS_EXTATTR],
|
|
{ "External Attributes LSA", "ospf.lsa.attr", FT_BOOLEAN, BASE_NONE, NULL, 0x0,
|
|
"", HFILL }},
|
|
{&ospf_filter[OSPFF_LS_OPAQUE],
|
|
{ "Opaque LSA", "ospf.lsa.opaque", FT_BOOLEAN, BASE_NONE, NULL, 0x0,
|
|
"", HFILL }},
|
|
|
|
/* Other interesting OSPF values */
|
|
|
|
{&ospf_filter[OSPFF_SRC_ROUTER],
|
|
{ "Source OSPF Router", "ospf.srcrouter", FT_IPv4, BASE_NONE, NULL, 0x0,
|
|
"", HFILL }},
|
|
|
|
{&ospf_filter[OSPFF_ADV_ROUTER],
|
|
{ "Advertising Router", "ospf.advrouter", FT_IPv4, BASE_NONE, NULL, 0x0,
|
|
"", HFILL }},
|
|
|
|
{&ospf_filter[OSPFF_LS_MPLS],
|
|
{ "MPLS Traffic Engineering LSA", "ospf.lsa.mpls", FT_BOOLEAN,
|
|
BASE_NONE, NULL, 0x0, "", HFILL }},
|
|
|
|
{&ospf_filter[OSPFF_LS_MPLS_ROUTERID],
|
|
{ "MPLS/TE Router ID", "ospf.mpls.routerid", FT_IPv4, BASE_NONE, NULL, 0x0,
|
|
"", HFILL }},
|
|
|
|
{&ospf_filter[OSPFF_LS_MPLS_LINKTYPE],
|
|
{ "MPLS/TE Link Type", "ospf.mpls.linktype", FT_UINT8, BASE_DEC, VALS(mpls_link_stlv_ltype_str), 0x0,
|
|
"MPLS/TE Link Type", HFILL }},
|
|
{&ospf_filter[OSPFF_LS_MPLS_LINKID],
|
|
{ "MPLS/TE Link ID", "ospf.mpls.linkid", FT_IPv4, BASE_NONE, NULL, 0x0,
|
|
"", HFILL }},
|
|
{&ospf_filter[OSPFF_LS_MPLS_LOCAL_ADDR],
|
|
{ "MPLS/TE Local Interface Address", "ospf.mpls.local_addr", FT_IPv4,
|
|
BASE_NONE, NULL, 0x0, "", HFILL }},
|
|
{&ospf_filter[OSPFF_LS_MPLS_REMOTE_ADDR],
|
|
{ "MPLS/TE Remote Interface Address", "ospf.mpls.remote_addr", FT_IPv4,
|
|
BASE_NONE, NULL, 0x0, "", HFILL }},
|
|
{&ospf_filter[OSPFF_LS_MPLS_LOCAL_IFID],
|
|
{ "MPLS/TE Local Interface Index", "ospf.mpls.local_id", FT_UINT32,
|
|
BASE_DEC, NULL, 0x0, "", HFILL }},
|
|
{&ospf_filter[OSPFF_LS_MPLS_REMOTE_IFID],
|
|
{ "MPLS/TE Remote Interface Index", "ospf.mpls.remote_id", FT_UINT32,
|
|
BASE_DEC, NULL, 0x0, "", HFILL }},
|
|
{&ospf_filter[OSPFF_LS_MPLS_LINKCOLOR],
|
|
{ "MPLS/TE Link Resource Class/Color", "ospf.mpls.linkcolor", FT_UINT32,
|
|
BASE_HEX, NULL, 0x0, "MPLS/TE Link Resource Class/Color", HFILL }},
|
|
|
|
{&ospf_filter[OSPFF_V2_OPTIONS],
|
|
{ "Options", "ospf.v2.options", FT_UINT8, BASE_HEX,
|
|
NULL, 0x0, "", HFILL }},
|
|
{&ospf_filter[OSPFF_V2_OPTIONS_E],
|
|
{ "E", "ospf.v2.options.e", FT_BOOLEAN, 8,
|
|
TFS(&tfs_v2_options_e), OSPF_V2_OPTIONS_E, "", HFILL }},
|
|
{&ospf_filter[OSPFF_V2_OPTIONS_MC],
|
|
{ "MC", "ospf.v2.options.mc", FT_BOOLEAN, 8,
|
|
TFS(&tfs_v2_options_mc), OSPF_V2_OPTIONS_MC, "", HFILL }},
|
|
{&ospf_filter[OSPFF_V2_OPTIONS_NP],
|
|
{ "NP", "ospf.v2.options.np", FT_BOOLEAN, 8,
|
|
TFS(&tfs_v2_options_np), OSPF_V2_OPTIONS_NP, "", HFILL }},
|
|
{&ospf_filter[OSPFF_V2_OPTIONS_L],
|
|
{ "L", "ospf.v2.options.l", FT_BOOLEAN, 8,
|
|
TFS(&tfs_v2_options_l), OSPF_V2_OPTIONS_L, "", HFILL }},
|
|
{&ospf_filter[OSPFF_V2_OPTIONS_DC],
|
|
{ "DC", "ospf.v2.options.dc", FT_BOOLEAN, 8,
|
|
TFS(&tfs_v2_options_dc), OSPF_V2_OPTIONS_DC, "", HFILL }},
|
|
{&ospf_filter[OSPFF_V2_OPTIONS_O],
|
|
{ "O", "ospf.v2.options.o", FT_BOOLEAN, 8,
|
|
TFS(&tfs_v2_options_o), OSPF_V2_OPTIONS_O, "", HFILL }},
|
|
{&ospf_filter[OSPFF_V2_OPTIONS_DN],
|
|
{ "DN", "ospf.v2.options.dn", FT_BOOLEAN, 8,
|
|
TFS(&tfs_v2_options_dn), OSPF_V2_OPTIONS_DN, "", HFILL }},
|
|
{&ospf_filter[OSPFF_V3_OPTIONS],
|
|
{ "Options", "ospf.v3.options", FT_UINT24, BASE_HEX,
|
|
NULL, 0x0, "", HFILL }},
|
|
{&ospf_filter[OSPFF_V3_OPTIONS_V6],
|
|
{ "V6", "ospf.v3.options.v6", FT_BOOLEAN, 24,
|
|
TFS(&tfs_v3_options_v6), OSPF_V3_OPTIONS_V6, "", HFILL }},
|
|
{&ospf_filter[OSPFF_V3_OPTIONS_E],
|
|
{ "E", "ospf.v3.options.e", FT_BOOLEAN, 24,
|
|
TFS(&tfs_v3_options_e), OSPF_V3_OPTIONS_E, "", HFILL }},
|
|
{&ospf_filter[OSPFF_V3_OPTIONS_MC],
|
|
{ "MC", "ospf.v3.options.mc", FT_BOOLEAN, 24,
|
|
TFS(&tfs_v3_options_mc), OSPF_V3_OPTIONS_MC, "", HFILL }},
|
|
{&ospf_filter[OSPFF_V3_OPTIONS_N],
|
|
{ "N", "ospf.v3.options.n", FT_BOOLEAN, 24,
|
|
TFS(&tfs_v3_options_n), OSPF_V3_OPTIONS_N, "", HFILL }},
|
|
{&ospf_filter[OSPFF_V3_OPTIONS_R],
|
|
{ "R", "ospf.v3.options.r", FT_BOOLEAN, 24,
|
|
TFS(&tfs_v3_options_r), OSPF_V3_OPTIONS_R, "", HFILL }},
|
|
{&ospf_filter[OSPFF_V3_OPTIONS_DC],
|
|
{ "DC", "ospf.v3.options.dc", FT_BOOLEAN, 24,
|
|
TFS(&tfs_v3_options_dc), OSPF_V3_OPTIONS_DC, "", HFILL }},
|
|
{&ospf_filter[OSPFF_DBD],
|
|
{ "DB Description", "ospf.dbd", FT_UINT8, BASE_HEX,
|
|
NULL, 0x0, "", HFILL }},
|
|
{&ospf_filter[OSPFF_DBD_R],
|
|
{ "R", "ospf.dbd.r", FT_BOOLEAN, 8,
|
|
TFS(&tfs_dbd_r), OSPF_DBD_FLAG_R, "", HFILL }},
|
|
{&ospf_filter[OSPFF_DBD_I],
|
|
{ "I", "ospf.dbd.i", FT_BOOLEAN, 8,
|
|
TFS(&tfs_dbd_i), OSPF_DBD_FLAG_I, "", HFILL }},
|
|
{&ospf_filter[OSPFF_DBD_M],
|
|
{ "M", "ospf.dbd.m", FT_BOOLEAN, 8,
|
|
TFS(&tfs_dbd_m), OSPF_DBD_FLAG_M, "", HFILL }},
|
|
{&ospf_filter[OSPFF_DBD_MS],
|
|
{ "MS", "ospf.dbd.ms", FT_BOOLEAN, 8,
|
|
TFS(&tfs_dbd_ms), OSPF_DBD_FLAG_MS, "", HFILL }},
|
|
{&ospf_filter[OSPFF_LLS_EXT_OPTIONS],
|
|
{ "Options", "ospf.lls.ext.options", FT_UINT32, BASE_HEX,
|
|
NULL, 0x0, "", HFILL }},
|
|
{&ospf_filter[OSPFF_LLS_EXT_OPTIONS_LR],
|
|
{ "LR", "ospf.lls.ext.options.lr", FT_BOOLEAN, 32,
|
|
TFS(&tfs_lls_ext_options_lr), OSPF_LLS_EXT_OPTIONS_LR, "", HFILL }},
|
|
{&ospf_filter[OSPFF_LLS_EXT_OPTIONS_RS],
|
|
{ "RS", "ospf.lls.ext.options.rs", FT_BOOLEAN, 32,
|
|
TFS(&tfs_lls_ext_options_rs), OSPF_LLS_EXT_OPTIONS_RS, "", HFILL }},
|
|
{&ospf_filter[OSPFF_V2_ROUTER_LSA_FLAG],
|
|
{ "Flags", "ospf.v2.router.lsa.flags", FT_UINT8, BASE_HEX,
|
|
NULL, 0x0, "", HFILL }},
|
|
{&ospf_filter[OSPFF_V2_ROUTER_LSA_FLAG_B],
|
|
{ "B", "ospf.v2.router.lsa.flags.b", FT_BOOLEAN, 8,
|
|
TFS(&tfs_v2_router_lsa_flags_b), OSPF_V2_ROUTER_LSA_FLAG_B, "", HFILL }},
|
|
{&ospf_filter[OSPFF_V2_ROUTER_LSA_FLAG_E],
|
|
{ "E", "ospf.v2.router.lsa.flags.e", FT_BOOLEAN, 8,
|
|
TFS(&tfs_v2_router_lsa_flags_e), OSPF_V2_ROUTER_LSA_FLAG_E, "", HFILL }},
|
|
{&ospf_filter[OSPFF_V2_ROUTER_LSA_FLAG_V],
|
|
{ "V", "ospf.v2.router.lsa.flags.v", FT_BOOLEAN, 8,
|
|
TFS(&tfs_v2_router_lsa_flags_v), OSPF_V2_ROUTER_LSA_FLAG_V, "", HFILL }},
|
|
{&ospf_filter[OSPFF_V3_ROUTER_LSA_FLAG],
|
|
{ "Flags", "ospf.v3.router.lsa.flags", FT_UINT8, BASE_HEX,
|
|
NULL, 0x0, "", HFILL }},
|
|
{&ospf_filter[OSPFF_V3_ROUTER_LSA_FLAG_B],
|
|
{ "B", "ospf.v3.router.lsa.flags.b", FT_BOOLEAN, 8,
|
|
TFS(&tfs_v3_router_lsa_flags_b), OSPF_V3_ROUTER_LSA_FLAG_B, "", HFILL }},
|
|
{&ospf_filter[OSPFF_V3_ROUTER_LSA_FLAG_E],
|
|
{ "E", "ospf.v3.router.lsa.flags.e", FT_BOOLEAN, 8,
|
|
TFS(&tfs_v3_router_lsa_flags_e), OSPF_V3_ROUTER_LSA_FLAG_E, "", HFILL }},
|
|
{&ospf_filter[OSPFF_V3_ROUTER_LSA_FLAG_V],
|
|
{ "V", "ospf.v3.router.lsa.flags.v", FT_BOOLEAN, 8,
|
|
TFS(&tfs_v3_router_lsa_flags_v), OSPF_V3_ROUTER_LSA_FLAG_V, "", HFILL }},
|
|
{&ospf_filter[OSPFF_V3_ROUTER_LSA_FLAG_W],
|
|
{ "W", "ospf.v3.router.lsa.flags.w", FT_BOOLEAN, 8,
|
|
TFS(&tfs_v3_router_lsa_flags_w), OSPF_V3_ROUTER_LSA_FLAG_W, "", HFILL }},
|
|
{&ospf_filter[OSPFF_V3_AS_EXTERNAL_FLAG],
|
|
{ "Flags", "ospf.v3.as.external.flags", FT_UINT8, BASE_HEX,
|
|
NULL, 0x0, "", HFILL }},
|
|
{&ospf_filter[OSPFF_V3_AS_EXTERNAL_FLAG_T],
|
|
{ "T", "ospf.v3.as.external.flags.t", FT_BOOLEAN, 8,
|
|
TFS(&tfs_v3_as_external_flags_t), OSPF_V3_AS_EXTERNAL_FLAG_T, "", HFILL }},
|
|
{&ospf_filter[OSPFF_V3_AS_EXTERNAL_FLAG_F],
|
|
{ "F", "ospf.v3.as.external.flags.f", FT_BOOLEAN, 8,
|
|
TFS(&tfs_v3_as_external_flags_f), OSPF_V3_AS_EXTERNAL_FLAG_F, "", HFILL }},
|
|
{&ospf_filter[OSPFF_V3_AS_EXTERNAL_FLAG_E],
|
|
{ "E", "ospf.v3.as.external.flags.e", FT_BOOLEAN, 8,
|
|
TFS(&tfs_v3_as_external_flags_e), OSPF_V3_AS_EXTERNAL_FLAG_E, "", HFILL }},
|
|
{&ospf_filter[OSPFF_V3_PREFIX_OPTION],
|
|
{ "PrefixOptions", "ospf.v3.prefix.options", FT_UINT8, BASE_HEX,
|
|
NULL, 0x0, "", HFILL }},
|
|
{&ospf_filter[OSPFF_V3_PREFIX_OPTION_NU],
|
|
{ "NU", "ospf.v3.prefix.options.nu", FT_BOOLEAN, 8,
|
|
TFS(&tfs_v3_prefix_options_nu), OSPF_V3_PREFIX_OPTION_NU, "", HFILL }},
|
|
{&ospf_filter[OSPFF_V3_PREFIX_OPTION_LA],
|
|
{ "LA", "ospf.v3.prefix.options.la", FT_BOOLEAN, 8,
|
|
TFS(&tfs_v3_prefix_options_la), OSPF_V3_PREFIX_OPTION_LA, "", HFILL }},
|
|
{&ospf_filter[OSPFF_V3_PREFIX_OPTION_MC],
|
|
{ "MC", "ospf.v3.prefix.options.mc", FT_BOOLEAN, 8,
|
|
TFS(&tfs_v3_prefix_options_mc), OSPF_V3_PREFIX_OPTION_MC, "", HFILL }},
|
|
{&ospf_filter[OSPFF_V3_PREFIX_OPTION_P],
|
|
{ "P", "ospf.v3.prefix.options.p", FT_BOOLEAN, 8,
|
|
TFS(&tfs_v3_prefix_options_p), OSPF_V3_PREFIX_OPTION_P, "", HFILL }},
|
|
};
|
|
|
|
static guint8 ospf_msg_type_to_filter (guint8 msg_type)
|
|
{
|
|
if (msg_type >= OSPF_HELLO &&
|
|
msg_type <= OSPF_LS_ACK)
|
|
return msg_type + OSPFF_MSG_MIN;
|
|
return -1;
|
|
}
|
|
|
|
static guint8 ospf_ls_type_to_filter (guint8 ls_type)
|
|
{
|
|
if (ls_type >= OSPF_LSTYPE_ROUTER &&
|
|
ls_type <= OSPF_LSTYPE_EXTATTR)
|
|
return OSPFF_LS_MIN + ls_type;
|
|
else if (ls_type >= OSPF_LSTYPE_OP_LINKLOCAL &&
|
|
ls_type <= OSPF_LSTYPE_OP_ASWIDE)
|
|
return OSPFF_LS_OPAQUE;
|
|
else
|
|
return -1;
|
|
}
|
|
|
|
typedef struct _bitfield_info {
|
|
int hfindex;
|
|
gint *ett;
|
|
int *index;
|
|
int num;
|
|
} bitfield_info;
|
|
|
|
static int bf_dbd[] = {
|
|
OSPFF_DBD_R,
|
|
OSPFF_DBD_I,
|
|
OSPFF_DBD_M,
|
|
OSPFF_DBD_MS
|
|
};
|
|
static int bf_lls_ext_options[] = {
|
|
OSPFF_LLS_EXT_OPTIONS_RS,
|
|
OSPFF_LLS_EXT_OPTIONS_LR
|
|
};
|
|
static int bf_v2_router_lsa_flags[] = {
|
|
OSPFF_V2_ROUTER_LSA_FLAG_V,
|
|
OSPFF_V2_ROUTER_LSA_FLAG_E,
|
|
OSPFF_V2_ROUTER_LSA_FLAG_B
|
|
};
|
|
static int bf_v3_router_lsa_flags[] = {
|
|
OSPFF_V3_ROUTER_LSA_FLAG_W,
|
|
OSPFF_V3_ROUTER_LSA_FLAG_V,
|
|
OSPFF_V3_ROUTER_LSA_FLAG_E,
|
|
OSPFF_V3_ROUTER_LSA_FLAG_B
|
|
};
|
|
static int bf_v3_as_external_flags[] = {
|
|
OSPFF_V3_AS_EXTERNAL_FLAG_E,
|
|
OSPFF_V3_AS_EXTERNAL_FLAG_F,
|
|
OSPFF_V3_AS_EXTERNAL_FLAG_T
|
|
};
|
|
static int bf_v2_options[] = {
|
|
OSPFF_V2_OPTIONS_DN,
|
|
OSPFF_V2_OPTIONS_O,
|
|
OSPFF_V2_OPTIONS_DC,
|
|
OSPFF_V2_OPTIONS_L,
|
|
OSPFF_V2_OPTIONS_NP,
|
|
OSPFF_V2_OPTIONS_MC,
|
|
OSPFF_V2_OPTIONS_E
|
|
};
|
|
static int bf_v3_options[] = {
|
|
OSPFF_V3_OPTIONS_DC,
|
|
OSPFF_V3_OPTIONS_R,
|
|
OSPFF_V3_OPTIONS_N,
|
|
OSPFF_V3_OPTIONS_MC,
|
|
OSPFF_V3_OPTIONS_E,
|
|
OSPFF_V3_OPTIONS_V6
|
|
};
|
|
static int bf_v3_prefix_options[] = {
|
|
OSPFF_V3_PREFIX_OPTION_P,
|
|
OSPFF_V3_PREFIX_OPTION_MC,
|
|
OSPFF_V3_PREFIX_OPTION_LA,
|
|
OSPFF_V3_PREFIX_OPTION_NU
|
|
};
|
|
|
|
static bitfield_info bfinfo_dbd = {
|
|
OSPFF_DBD, &ett_ospf_dbd,
|
|
bf_dbd, array_length(bf_dbd)
|
|
};
|
|
static bitfield_info bfinfo_lls_ext_options = {
|
|
OSPFF_LLS_EXT_OPTIONS, &ett_ospf_lls_ext_options,
|
|
bf_lls_ext_options, array_length(bf_lls_ext_options)
|
|
};
|
|
static bitfield_info bfinfo_v2_router_lsa_flags = {
|
|
OSPFF_V2_ROUTER_LSA_FLAG, &ett_ospf_v2_router_lsa_flags,
|
|
bf_v2_router_lsa_flags, array_length(bf_v2_router_lsa_flags)
|
|
};
|
|
static bitfield_info bfinfo_v3_router_lsa_flags = {
|
|
OSPFF_V3_ROUTER_LSA_FLAG, &ett_ospf_v3_router_lsa_flags,
|
|
bf_v3_router_lsa_flags, array_length(bf_v3_router_lsa_flags)
|
|
};
|
|
static bitfield_info bfinfo_v3_as_external_flags = {
|
|
OSPFF_V3_AS_EXTERNAL_FLAG, &ett_ospf_v3_as_external_flags,
|
|
bf_v3_as_external_flags, array_length(bf_v3_as_external_flags)
|
|
};
|
|
static bitfield_info bfinfo_v2_options = {
|
|
OSPFF_V2_OPTIONS, &ett_ospf_v2_options,
|
|
bf_v2_options, array_length(bf_v2_options)
|
|
};
|
|
static bitfield_info bfinfo_v3_options = {
|
|
OSPFF_V3_OPTIONS, &ett_ospf_v3_options,
|
|
bf_v3_options, array_length(bf_v3_options)
|
|
};
|
|
static bitfield_info bfinfo_v3_prefix_options = {
|
|
OSPFF_V3_PREFIX_OPTION, &ett_ospf_v3_prefix_options,
|
|
bf_v3_prefix_options, array_length(bf_v3_prefix_options)
|
|
};
|
|
|
|
#define MAX_OPTIONS_LEN 128
|
|
static void
|
|
dissect_ospf_bitfield (proto_tree *parent_tree, tvbuff_t *tvb, int offset,
|
|
bitfield_info *bfinfo)
|
|
{
|
|
proto_item *item = NULL;
|
|
proto_tree *tree = NULL;
|
|
guint32 flags;
|
|
char *str;
|
|
size_t length, pos;
|
|
gint i;
|
|
header_field_info *hfinfo;
|
|
int hfindex, index;
|
|
size_t returned_length;
|
|
|
|
hfindex = ospf_filter[bfinfo->hfindex];
|
|
hfinfo = proto_registrar_get_nth(hfindex);
|
|
switch (hfinfo->type) {
|
|
case FT_UINT8:
|
|
flags = tvb_get_guint8(tvb, offset);
|
|
length = 1;
|
|
break;
|
|
case FT_UINT16:
|
|
flags = tvb_get_ntohs(tvb, offset);
|
|
length = 2;
|
|
break;
|
|
case FT_UINT24:
|
|
flags = tvb_get_ntoh24(tvb, offset);
|
|
length = 3;
|
|
break;
|
|
case FT_UINT32:
|
|
flags = tvb_get_ntohl(tvb, offset);
|
|
length = 4;
|
|
break;
|
|
default:
|
|
return;
|
|
}
|
|
|
|
if (parent_tree) {
|
|
item = proto_tree_add_uint(parent_tree, hfindex, tvb, offset, length, flags);
|
|
tree = proto_item_add_subtree(item, *bfinfo->ett);
|
|
|
|
str = ep_alloc(MAX_OPTIONS_LEN);
|
|
str[0] = 0;
|
|
for (i = 0, pos = 0; i < bfinfo->num; i++) {
|
|
index = ospf_filter[bfinfo->index[i]];
|
|
hfinfo = proto_registrar_get_nth(index);
|
|
if (flags & hfinfo->bitmask) {
|
|
returned_length = g_snprintf(&str[pos], MAX_OPTIONS_LEN-pos, "%s%s",
|
|
pos ? ", " : "",
|
|
hfinfo->name);
|
|
pos += MIN(returned_length, MAX_OPTIONS_LEN-pos);
|
|
}
|
|
proto_tree_add_boolean(tree, index, tvb, offset, length, flags);
|
|
}
|
|
proto_item_append_text(item, " (%s)", str);
|
|
}
|
|
}
|
|
|
|
static dissector_handle_t data_handle;
|
|
|
|
static void dissect_ospf_hello(tvbuff_t*, int, proto_tree*, guint8, guint16);
|
|
static void dissect_ospf_db_desc(tvbuff_t*, int, proto_tree*, guint8, guint16);
|
|
static void dissect_ospf_ls_req(tvbuff_t*, int, proto_tree*, guint8, guint16);
|
|
static void dissect_ospf_ls_upd(tvbuff_t*, int, proto_tree*, guint8, guint16);
|
|
static void dissect_ospf_ls_ack(tvbuff_t*, int, proto_tree*, guint8, guint16);
|
|
static void dissect_ospf_lls_data_block(tvbuff_t*, int, proto_tree*, guint8);
|
|
|
|
/* dissect_ospf_v[23]lsa returns the offset of the next LSA
|
|
* if disassemble_body is set to FALSE (e.g. in LSA ACK
|
|
* packets), the offset is set to the offset of the next
|
|
* LSA header
|
|
*/
|
|
static int dissect_ospf_v2_lsa(tvbuff_t*, int, proto_tree*, gboolean disassemble_body);
|
|
static int dissect_ospf_v3_lsa(tvbuff_t*, int, proto_tree*, gboolean disassemble_body);
|
|
|
|
static void dissect_ospf_v3_address_prefix(tvbuff_t *, int, int, proto_tree *);
|
|
|
|
static int
|
|
ospf_has_lls_block(tvbuff_t *tvb, int offset, guint8 packet_type)
|
|
{
|
|
guint8 flags;
|
|
|
|
/* LLS block can be found only in HELLO and DBDESC packets */
|
|
switch (packet_type) {
|
|
case OSPF_HELLO:
|
|
flags = tvb_get_guint8 (tvb, offset + 6);
|
|
return flags & OSPF_V2_OPTIONS_L;
|
|
case OSPF_DB_DESC:
|
|
flags = tvb_get_guint8 (tvb, offset + 2);
|
|
return flags & OSPF_V2_OPTIONS_L;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
dissect_ospf(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
|
|
{
|
|
proto_tree *ospf_tree = NULL;
|
|
proto_item *ti;
|
|
proto_tree *ospf_header_tree;
|
|
guint8 version;
|
|
guint8 packet_type;
|
|
guint16 ospflen;
|
|
vec_t cksum_vec[4];
|
|
int cksum_vec_len;
|
|
guint32 phdr[2];
|
|
guint16 cksum, computed_cksum;
|
|
guint length, reported_length;
|
|
guint16 auth_type;
|
|
char auth_data[8+1];
|
|
int crypto_len = 0;
|
|
unsigned int ospf_header_length;
|
|
guint8 instance_ID;
|
|
guint8 reserved;
|
|
guint32 areaid;
|
|
|
|
|
|
if (check_col(pinfo->cinfo, COL_PROTOCOL))
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "OSPF");
|
|
if (check_col(pinfo->cinfo, COL_INFO))
|
|
col_clear(pinfo->cinfo, COL_INFO);
|
|
|
|
version = tvb_get_guint8(tvb, 0);
|
|
switch (version) {
|
|
case OSPF_VERSION_2:
|
|
ospf_header_length = OSPF_VERSION_2_HEADER_LENGTH;
|
|
break;
|
|
case OSPF_VERSION_3:
|
|
ospf_header_length = OSPF_VERSION_3_HEADER_LENGTH;
|
|
break;
|
|
default:
|
|
ospf_header_length = 14;
|
|
break;
|
|
}
|
|
|
|
packet_type = tvb_get_guint8(tvb, 1);
|
|
if (check_col(pinfo->cinfo, COL_INFO)) {
|
|
col_add_str(pinfo->cinfo, COL_INFO,
|
|
val_to_str(packet_type, pt_vals, "Unknown (%u)"));
|
|
}
|
|
|
|
if (tree) {
|
|
ospflen = tvb_get_ntohs(tvb, 2);
|
|
|
|
ti = proto_tree_add_item(tree, proto_ospf, tvb, 0, -1, FALSE);
|
|
ospf_tree = proto_item_add_subtree(ti, ett_ospf);
|
|
|
|
ti = proto_tree_add_text(ospf_tree, tvb, 0, ospf_header_length,
|
|
"OSPF Header");
|
|
ospf_header_tree = proto_item_add_subtree(ti, ett_ospf_hdr);
|
|
|
|
proto_tree_add_text(ospf_header_tree, tvb, 0, 1, "OSPF Version: %u",
|
|
version);
|
|
proto_tree_add_item(ospf_header_tree, ospf_filter[OSPFF_MSG_TYPE],
|
|
tvb, 1, 1, FALSE);
|
|
proto_tree_add_item_hidden(ospf_header_tree,
|
|
ospf_filter[ospf_msg_type_to_filter(packet_type)],
|
|
tvb, 1, 1, FALSE);
|
|
proto_tree_add_text(ospf_header_tree, tvb, 2, 2, "Packet Length: %u",
|
|
ospflen);
|
|
proto_tree_add_item(ospf_header_tree, ospf_filter[OSPFF_SRC_ROUTER],
|
|
tvb, 4, 4, FALSE);
|
|
areaid=tvb_get_ntohl(tvb,8);
|
|
proto_tree_add_text(ospf_header_tree, tvb, 8, 4, "Area ID: %s%s",
|
|
ip_to_str(tvb_get_ptr(tvb, 8, 4)), areaid == 0 ? " (Backbone)" : "");
|
|
|
|
/*
|
|
* Quit at this point if it's an unknown OSPF version.
|
|
*/
|
|
switch (version) {
|
|
|
|
case OSPF_VERSION_2:
|
|
case OSPF_VERSION_3:
|
|
break;
|
|
|
|
default:
|
|
cksum = tvb_get_ntohs(tvb, 12);
|
|
if (cksum == 0) {
|
|
/* No checksum supplied in the packet. */
|
|
proto_tree_add_text(ospf_header_tree, tvb, 12, 2,
|
|
"Packet Checksum: 0x%04x (none)", cksum);
|
|
} else {
|
|
proto_tree_add_text(ospf_header_tree, tvb, 12, 2,
|
|
"Packet Checksum: 0x%04x", cksum);
|
|
}
|
|
proto_tree_add_text(ospf_tree, tvb, 14, -1,
|
|
"Unknown OSPF version %u", version);
|
|
return;
|
|
}
|
|
|
|
cksum = tvb_get_ntohs(tvb, 12);
|
|
length = tvb_length(tvb);
|
|
/* XXX - include only the length from the OSPF header? */
|
|
reported_length = tvb_reported_length(tvb);
|
|
if (cksum == 0) {
|
|
/* No checksum supplied in the packet. */
|
|
proto_tree_add_text(ospf_header_tree, tvb, 12, 2,
|
|
"Packet Checksum: 0x%04x (none)", cksum);
|
|
} else if (!pinfo->fragmented && length >= reported_length
|
|
&& length >= ospf_header_length) {
|
|
/* The packet isn't part of a fragmented datagram and isn't
|
|
truncated, so we can checksum it. */
|
|
|
|
switch (version) {
|
|
|
|
case OSPF_VERSION_2:
|
|
/* Header, not including the authentication data (the OSPFv2
|
|
checksum excludes the 64-bit authentication field). */
|
|
cksum_vec[0].ptr = tvb_get_ptr(tvb, 0, 16);
|
|
cksum_vec[0].len = 16;
|
|
if (length > ospf_header_length) {
|
|
/* Rest of the packet, again not including the
|
|
authentication data. */
|
|
reported_length -= ospf_header_length;
|
|
cksum_vec[1].ptr = tvb_get_ptr(tvb, ospf_header_length, reported_length);
|
|
cksum_vec[1].len = reported_length;
|
|
cksum_vec_len = 2;
|
|
} else {
|
|
/* There's nothing but a header. */
|
|
cksum_vec_len = 1;
|
|
}
|
|
break;
|
|
|
|
case OSPF_VERSION_3:
|
|
/* IPv6-style checksum, covering the entire OSPF packet
|
|
and a prepended IPv6 pseudo-header. */
|
|
|
|
/* Set up the fields of the pseudo-header. */
|
|
cksum_vec[0].ptr = pinfo->src.data;
|
|
cksum_vec[0].len = pinfo->src.len;
|
|
cksum_vec[1].ptr = pinfo->dst.data;
|
|
cksum_vec[1].len = pinfo->dst.len;
|
|
cksum_vec[2].ptr = (const guint8 *)&phdr;
|
|
phdr[0] = g_htonl(ospflen);
|
|
phdr[1] = g_htonl(IP_PROTO_OSPF);
|
|
cksum_vec[2].len = 8;
|
|
|
|
cksum_vec[3].ptr = tvb_get_ptr(tvb, 0, reported_length);
|
|
cksum_vec[3].len = reported_length;
|
|
cksum_vec_len = 4;
|
|
break;
|
|
|
|
default:
|
|
DISSECTOR_ASSERT_NOT_REACHED();
|
|
cksum_vec_len = 0;
|
|
break;
|
|
}
|
|
computed_cksum = in_cksum(cksum_vec, cksum_vec_len);
|
|
if (computed_cksum == 0) {
|
|
proto_tree_add_text(ospf_header_tree, tvb, 12, 2,
|
|
"Packet Checksum: 0x%04x [correct]", cksum);
|
|
} else {
|
|
proto_tree_add_text(ospf_header_tree, tvb, 12, 2,
|
|
"Packet Checksum: 0x%04x [incorrect, should be 0x%04x]",
|
|
cksum, in_cksum_shouldbe(cksum, computed_cksum));
|
|
}
|
|
} else {
|
|
proto_tree_add_text(ospf_header_tree, tvb, 12, 2,
|
|
"Packet Checksum: 0x%04x", cksum);
|
|
}
|
|
|
|
|
|
switch (version) {
|
|
|
|
case OSPF_VERSION_2:
|
|
/* Authentication is only valid for OSPFv2 */
|
|
auth_type = tvb_get_ntohs(tvb, 14);
|
|
proto_tree_add_text(ospf_header_tree, tvb, 14, 2, "Auth Type: %s",
|
|
val_to_str(auth_type, auth_vals, "Unknown (%u)"));
|
|
switch (auth_type) {
|
|
|
|
case OSPF_AUTH_NONE:
|
|
proto_tree_add_text(ospf_header_tree, tvb, 16, 8, "Auth Data (none)");
|
|
break;
|
|
|
|
case OSPF_AUTH_SIMPLE:
|
|
tvb_get_nstringz0(tvb, 16, 8+1, auth_data);
|
|
proto_tree_add_text(ospf_header_tree, tvb, 16, 8, "Auth Data: %s", auth_data);
|
|
break;
|
|
|
|
case OSPF_AUTH_CRYPT:
|
|
proto_tree_add_text(ospf_header_tree, tvb, 18, 1, "Auth Key ID: %u",
|
|
tvb_get_guint8(tvb, 18));
|
|
crypto_len = tvb_get_guint8(tvb, 19);
|
|
proto_tree_add_text(ospf_header_tree, tvb, 19, 1, "Auth Data Length: %u",
|
|
crypto_len);
|
|
proto_tree_add_text(ospf_header_tree, tvb, 20, 4, "Auth Crypto Sequence Number: 0x%x",
|
|
tvb_get_ntohl(tvb, 20));
|
|
|
|
/* Show the message digest that was appended to the end of the
|
|
OSPF message - but only if it's present (we don't want
|
|
to get an exception before we've tried dissecting OSPF
|
|
message). */
|
|
if (tvb_bytes_exist(tvb, ospflen, crypto_len)) {
|
|
proto_tree_add_text(ospf_header_tree, tvb, ospflen, crypto_len,
|
|
"Auth Data: %s",
|
|
tvb_bytes_to_str(tvb, ospflen, crypto_len));
|
|
}
|
|
break;
|
|
|
|
default:
|
|
proto_tree_add_text(ospf_header_tree, tvb, 16, 8, "Auth Data (unknown)");
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case OSPF_VERSION_3:
|
|
/* Instance ID and "reserved" is OSPFv3-only */
|
|
instance_ID = tvb_get_guint8(tvb, 14);
|
|
proto_tree_add_text(ospf_header_tree, tvb, 14, 1, "Instance ID: %u",
|
|
instance_ID);
|
|
reserved = tvb_get_guint8(tvb, 15);
|
|
proto_tree_add_text(ospf_header_tree, tvb, 15, 1, (reserved == 0 ? "Reserved: %u" : "Reserved: %u [incorrect, should be 0]"),
|
|
reserved);
|
|
break;
|
|
}
|
|
|
|
switch (packet_type){
|
|
|
|
case OSPF_HELLO:
|
|
dissect_ospf_hello(tvb, ospf_header_length, ospf_tree, version,
|
|
ospflen - ospf_header_length);
|
|
break;
|
|
|
|
case OSPF_DB_DESC:
|
|
dissect_ospf_db_desc(tvb, ospf_header_length, ospf_tree, version,
|
|
ospflen - ospf_header_length);
|
|
break;
|
|
|
|
case OSPF_LS_REQ:
|
|
dissect_ospf_ls_req(tvb, ospf_header_length, ospf_tree, version,
|
|
ospflen - ospf_header_length);
|
|
break;
|
|
|
|
case OSPF_LS_UPD:
|
|
dissect_ospf_ls_upd(tvb, ospf_header_length, ospf_tree, version,
|
|
ospflen - ospf_header_length);
|
|
break;
|
|
|
|
case OSPF_LS_ACK:
|
|
dissect_ospf_ls_ack(tvb, ospf_header_length, ospf_tree, version,
|
|
ospflen - ospf_header_length);
|
|
break;
|
|
|
|
default:
|
|
call_dissector(data_handle,
|
|
tvb_new_subset(tvb, ospf_header_length, -1, -1), pinfo, tree);
|
|
break;
|
|
}
|
|
|
|
/* take care of the LLS data block */
|
|
if (ospf_has_lls_block(tvb, ospf_header_length, packet_type))
|
|
dissect_ospf_lls_data_block(tvb, ospflen + crypto_len, ospf_tree,
|
|
version);
|
|
}
|
|
}
|
|
|
|
static int
|
|
dissect_ospf_lls_tlv(tvbuff_t *tvb, int offset, proto_tree *tree)
|
|
{
|
|
proto_item *ti;
|
|
proto_tree *ospf_lls_tlv_tree;
|
|
guint16 type;
|
|
guint16 length;
|
|
|
|
type = tvb_get_ntohs(tvb, offset);
|
|
length = tvb_get_ntohs(tvb, offset + 2);
|
|
|
|
ti = proto_tree_add_text(tree, tvb, offset, length + 4,
|
|
val_to_str(type, lls_tlv_type_vals, "Unknown TLV"));
|
|
ospf_lls_tlv_tree = proto_item_add_subtree(ti, ett_ospf_lls_tlv);
|
|
|
|
proto_tree_add_text(ospf_lls_tlv_tree, tvb, offset, 2,
|
|
"Type: %d", type);
|
|
proto_tree_add_text(ospf_lls_tlv_tree, tvb, offset + 2, 2,
|
|
"Length: %d", length);
|
|
|
|
switch(type) {
|
|
case 1:
|
|
dissect_ospf_bitfield(ospf_lls_tlv_tree, tvb, offset + 4, &bfinfo_lls_ext_options);
|
|
break;
|
|
case 2:
|
|
proto_tree_add_text(ospf_lls_tlv_tree, tvb, offset + 4, 4,
|
|
"Sequence number 0x%08x",
|
|
tvb_get_ntohl(tvb, offset + 4));
|
|
proto_tree_add_text(ospf_lls_tlv_tree, tvb, offset + 8, length - 4,
|
|
"Auth Data: %s",
|
|
tvb_bytes_to_str(tvb, offset + 8, length - 4));
|
|
break;
|
|
}
|
|
|
|
return offset + length + 4;
|
|
}
|
|
|
|
static void
|
|
dissect_ospf_lls_data_block(tvbuff_t *tvb, int offset, proto_tree *tree,
|
|
guint8 version)
|
|
{
|
|
proto_tree *ospf_lls_data_block_tree;
|
|
proto_item *ti;
|
|
guint16 ospf_lls_len;
|
|
int orig_offset = offset;
|
|
|
|
ospf_lls_len = tvb_get_ntohs(tvb, offset + 2);
|
|
ti = proto_tree_add_text(tree, tvb, offset, -1, "OSPF LLS Data Block");
|
|
ospf_lls_data_block_tree = proto_item_add_subtree(ti,
|
|
ett_ospf_lls_data_block);
|
|
|
|
if (version != OSPF_VERSION_2)
|
|
return;
|
|
|
|
/* TODO: verify checksum */
|
|
proto_tree_add_text(ospf_lls_data_block_tree, tvb, offset, 2,
|
|
"Checksum: 0x%04x", tvb_get_ntohs(tvb, offset));
|
|
proto_tree_add_text(ospf_lls_data_block_tree, tvb, offset + 2, 2,
|
|
"LLS Data Length: %d bytes", ospf_lls_len * 4);
|
|
|
|
offset += 4;
|
|
while (orig_offset + ospf_lls_len * 4 > offset)
|
|
offset = dissect_ospf_lls_tlv (tvb, offset, ospf_lls_data_block_tree);
|
|
}
|
|
|
|
static void
|
|
dissect_ospf_hello(tvbuff_t *tvb, int offset, proto_tree *tree, guint8 version,
|
|
guint16 length)
|
|
{
|
|
proto_tree *ospf_hello_tree;
|
|
proto_item *ti;
|
|
int orig_offset = offset;
|
|
|
|
ti = proto_tree_add_text(tree, tvb, offset, length, "OSPF Hello Packet");
|
|
ospf_hello_tree = proto_item_add_subtree(ti, ett_ospf_hello);
|
|
|
|
switch (version ) {
|
|
case OSPF_VERSION_2:
|
|
proto_tree_add_text(ospf_hello_tree, tvb, offset, 4, "Network Mask: %s",
|
|
ip_to_str(tvb_get_ptr(tvb, offset, 4)));
|
|
proto_tree_add_text(ospf_hello_tree, tvb, offset + 4, 2,
|
|
"Hello Interval: %u seconds",
|
|
tvb_get_ntohs(tvb, offset + 4));
|
|
|
|
dissect_ospf_bitfield(ospf_hello_tree, tvb, offset + 6, &bfinfo_v2_options);
|
|
proto_tree_add_text(ospf_hello_tree, tvb, offset + 7, 1, "Router Priority: %u",
|
|
tvb_get_guint8(tvb, offset + 7));
|
|
proto_tree_add_text(ospf_hello_tree, tvb, offset + 8, 4, "Router Dead Interval: %u seconds",
|
|
tvb_get_ntohl(tvb, offset + 8));
|
|
proto_tree_add_text(ospf_hello_tree, tvb, offset + 12, 4, "Designated Router: %s",
|
|
ip_to_str(tvb_get_ptr(tvb, offset + 12, 4)));
|
|
proto_tree_add_text(ospf_hello_tree, tvb, offset + 16, 4, "Backup Designated Router: %s",
|
|
ip_to_str(tvb_get_ptr(tvb, offset + 16, 4)));
|
|
|
|
offset += 20;
|
|
while (orig_offset + length > offset) {
|
|
proto_tree_add_text(ospf_hello_tree, tvb, offset, 4,
|
|
"Active Neighbor: %s",
|
|
ip_to_str(tvb_get_ptr(tvb, offset, 4)));
|
|
offset += 4;
|
|
}
|
|
break;
|
|
case OSPF_VERSION_3:
|
|
proto_tree_add_text(ospf_hello_tree, tvb, offset + 0, 4, "Interface ID: %u",
|
|
tvb_get_ntohl(tvb, offset + 0));
|
|
proto_tree_add_text(ospf_hello_tree, tvb, offset + 4, 1, "Router Priority: %u",
|
|
tvb_get_guint8(tvb, offset + 4));
|
|
dissect_ospf_bitfield(ospf_hello_tree, tvb, offset + 5, &bfinfo_v3_options);
|
|
proto_tree_add_text(ospf_hello_tree, tvb, offset + 8, 2,
|
|
"Hello Interval: %u seconds",
|
|
tvb_get_ntohs(tvb, offset + 8));
|
|
proto_tree_add_text(ospf_hello_tree, tvb, offset + 10, 2, "Router Dead Interval: %u seconds",
|
|
tvb_get_ntohs(tvb, offset + 10));
|
|
proto_tree_add_text(ospf_hello_tree, tvb, offset + 12, 4, "Designated Router: %s",
|
|
ip_to_str(tvb_get_ptr(tvb, offset + 12, 4)));
|
|
proto_tree_add_text(ospf_hello_tree, tvb, offset + 16, 4, "Backup Designated Router: %s",
|
|
ip_to_str(tvb_get_ptr(tvb, offset + 16, 4)));
|
|
offset += 20;
|
|
while (orig_offset + length > offset) {
|
|
proto_tree_add_text(ospf_hello_tree, tvb, offset, 4,
|
|
"Active Neighbor: %s",
|
|
ip_to_str(tvb_get_ptr(tvb, offset, 4)));
|
|
offset += 4;
|
|
}
|
|
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
dissect_ospf_db_desc(tvbuff_t *tvb, int offset, proto_tree *tree,
|
|
guint8 version, guint16 length)
|
|
{
|
|
proto_tree *ospf_db_desc_tree=NULL;
|
|
proto_item *ti;
|
|
guint8 reserved;
|
|
int orig_offset = offset;
|
|
|
|
if (tree) {
|
|
ti = proto_tree_add_text(tree, tvb, offset, length, "OSPF DB Description");
|
|
ospf_db_desc_tree = proto_item_add_subtree(ti, ett_ospf_desc);
|
|
|
|
switch (version ) {
|
|
|
|
case OSPF_VERSION_2:
|
|
proto_tree_add_text(ospf_db_desc_tree, tvb, offset, 2, "Interface MTU: %u",
|
|
tvb_get_ntohs(tvb, offset));
|
|
|
|
dissect_ospf_bitfield(ospf_db_desc_tree, tvb, offset + 2, &bfinfo_v2_options);
|
|
dissect_ospf_bitfield(ospf_db_desc_tree, tvb, offset + 3, &bfinfo_dbd);
|
|
|
|
proto_tree_add_text(ospf_db_desc_tree, tvb, offset + 4, 4, "DD Sequence: %u",
|
|
tvb_get_ntohl(tvb, offset + 4));
|
|
|
|
offset += 8;
|
|
break;
|
|
|
|
case OSPF_VERSION_3:
|
|
|
|
reserved = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_text(ospf_db_desc_tree, tvb, offset, 1, (reserved == 0 ? "Reserved: %u" : "Reserved: %u [incorrect, should be 0]"),
|
|
reserved);
|
|
|
|
dissect_ospf_bitfield(ospf_db_desc_tree, tvb, offset + 1, &bfinfo_v3_options);
|
|
|
|
proto_tree_add_text(ospf_db_desc_tree, tvb, offset + 4, 2, "Interface MTU: %u",
|
|
tvb_get_ntohs(tvb, offset+4));
|
|
|
|
reserved = tvb_get_guint8(tvb, offset + 6);
|
|
proto_tree_add_text(ospf_db_desc_tree, tvb, offset + 6, 1, (reserved == 0 ? "Reserved: %u" : "Reserved: %u [incorrect, should be 0]"),
|
|
reserved);
|
|
|
|
dissect_ospf_bitfield(ospf_db_desc_tree, tvb, offset + 7, &bfinfo_dbd);
|
|
|
|
proto_tree_add_text(ospf_db_desc_tree, tvb, offset + 8, 4, "DD Sequence: %u",
|
|
tvb_get_ntohl(tvb, offset + 8));
|
|
|
|
offset += 12;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* LS Headers will be processed here */
|
|
/* skip to the end of DB-Desc header */
|
|
while (orig_offset + length > offset) {
|
|
if ( version == OSPF_VERSION_2)
|
|
offset = dissect_ospf_v2_lsa(tvb, offset, tree, FALSE);
|
|
else
|
|
if ( version == OSPF_VERSION_3)
|
|
offset = dissect_ospf_v3_lsa(tvb, offset, tree, FALSE);
|
|
}
|
|
|
|
}
|
|
|
|
static void
|
|
dissect_ospf_ls_req(tvbuff_t *tvb, int offset, proto_tree *tree, guint8 version,
|
|
guint16 length)
|
|
{
|
|
proto_tree *ospf_lsr_tree;
|
|
proto_item *ti;
|
|
guint32 ls_type;
|
|
guint16 reserved;
|
|
int orig_offset = offset;
|
|
|
|
/* zero or more LS requests may be within a LS Request */
|
|
/* we place every request for a LSA in a single subtree */
|
|
while (orig_offset + length > offset) {
|
|
ti = proto_tree_add_text(tree, tvb, offset, OSPF_LS_REQ_LENGTH,
|
|
"Link State Request");
|
|
ospf_lsr_tree = proto_item_add_subtree(ti, ett_ospf_lsr);
|
|
|
|
switch ( version ) {
|
|
|
|
case OSPF_VERSION_2:
|
|
ls_type = tvb_get_ntohl(tvb, offset);
|
|
proto_tree_add_item(ospf_lsr_tree, ospf_filter[OSPFF_LS_TYPE],
|
|
tvb, offset, 4, FALSE);
|
|
break;
|
|
case OSPF_VERSION_3:
|
|
reserved = tvb_get_ntohs(tvb, offset);
|
|
proto_tree_add_text(ospf_lsr_tree, tvb, offset, 2,
|
|
(reserved == 0 ? "Reserved: %u" : "Reserved: %u [incorrect, should be 0]"), reserved);
|
|
ls_type = tvb_get_ntohs(tvb, offset+2);
|
|
proto_tree_add_text(ospf_lsr_tree, tvb, offset+2, 2, "LS Type: %s (0x%04x)",
|
|
val_to_str(ls_type, v3_ls_type_vals, "Unknown"),
|
|
ls_type);
|
|
break;
|
|
}
|
|
|
|
|
|
proto_tree_add_text(ospf_lsr_tree, tvb, offset + 4, 4, "Link State ID: %s",
|
|
ip_to_str(tvb_get_ptr(tvb, offset + 4, 4)));
|
|
proto_tree_add_item(ospf_lsr_tree, ospf_filter[OSPFF_ADV_ROUTER],
|
|
tvb, offset + 8, 4, FALSE);
|
|
|
|
offset += 12;
|
|
}
|
|
}
|
|
|
|
static void
|
|
dissect_ospf_ls_upd(tvbuff_t *tvb, int offset, proto_tree *tree, guint8 version,
|
|
guint16 length)
|
|
{
|
|
proto_tree *ospf_lsa_upd_tree=NULL;
|
|
proto_item *ti;
|
|
guint32 lsa_nr;
|
|
guint32 lsa_counter;
|
|
|
|
ti = proto_tree_add_text(tree, tvb, offset, length, "LS Update Packet");
|
|
ospf_lsa_upd_tree = proto_item_add_subtree(ti, ett_ospf_lsa_upd);
|
|
|
|
lsa_nr = tvb_get_ntohl(tvb, offset);
|
|
proto_tree_add_text(ospf_lsa_upd_tree, tvb, offset, 4, "Number of LSAs: %u",
|
|
lsa_nr);
|
|
/* skip to the beginning of the first LSA */
|
|
offset += 4; /* the LS Upd Packet contains only a 32 bit #LSAs field */
|
|
|
|
lsa_counter = 0;
|
|
while (lsa_counter < lsa_nr) {
|
|
if ( version == OSPF_VERSION_2)
|
|
offset = dissect_ospf_v2_lsa(tvb, offset, ospf_lsa_upd_tree, TRUE);
|
|
else
|
|
if ( version == OSPF_VERSION_3)
|
|
offset = dissect_ospf_v3_lsa(tvb, offset, ospf_lsa_upd_tree, TRUE);
|
|
lsa_counter += 1;
|
|
}
|
|
}
|
|
|
|
static void
|
|
dissect_ospf_ls_ack(tvbuff_t *tvb, int offset, proto_tree *tree, guint8 version,
|
|
guint16 length)
|
|
{
|
|
int orig_offset = offset;
|
|
/* the body of a LS Ack packet simply contains zero or more LSA Headers */
|
|
while (orig_offset + length > offset) {
|
|
if ( version == OSPF_VERSION_2)
|
|
offset = dissect_ospf_v2_lsa(tvb, offset, tree, FALSE);
|
|
else
|
|
if ( version == OSPF_VERSION_3)
|
|
offset = dissect_ospf_v3_lsa(tvb, offset, tree, FALSE);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Returns if an LSA is opaque, i.e. requires special treatment
|
|
*/
|
|
static int
|
|
is_opaque(int lsa_type)
|
|
{
|
|
return (lsa_type >= OSPF_LSTYPE_OP_LINKLOCAL &&
|
|
lsa_type <= OSPF_LSTYPE_OP_ASWIDE);
|
|
}
|
|
|
|
/* MPLS/TE TLV types */
|
|
#define MPLS_TLV_ROUTER 1
|
|
#define MPLS_TLV_LINK 2
|
|
#define OIF_TLV_TNA 32768
|
|
|
|
/* MPLS/TE Link STLV types */
|
|
enum {
|
|
MPLS_LINK_TYPE = 1,
|
|
MPLS_LINK_ID,
|
|
MPLS_LINK_LOCAL_IF,
|
|
MPLS_LINK_REMOTE_IF,
|
|
MPLS_LINK_TE_METRIC,
|
|
MPLS_LINK_MAX_BW,
|
|
MPLS_LINK_MAX_RES_BW,
|
|
MPLS_LINK_UNRES_BW,
|
|
MPLS_LINK_COLOR,
|
|
MPLS_LINK_LOCAL_REMOTE_ID = 11,
|
|
MPLS_LINK_PROTECTION = 14,
|
|
MPLS_LINK_IF_SWITCHING_DESC,
|
|
MPLS_LINK_SHARED_RISK_GROUP
|
|
};
|
|
|
|
/* OIF TLV types */
|
|
enum {
|
|
OIF_LOCAL_NODE_ID = 32773,
|
|
OIF_REMOTE_NODE_ID,
|
|
OIF_SONET_SDH_SWITCHING_CAPABILITY,
|
|
OIF_TNA_IPv4_ADDRESS,
|
|
OIF_NODE_ID,
|
|
OIF_TNA_IPv6_ADDRESS,
|
|
OIF_TNA_NSAP_ADDRESS
|
|
};
|
|
|
|
static const value_string mpls_link_stlv_str[] = {
|
|
{MPLS_LINK_TYPE, "Link Type"},
|
|
{MPLS_LINK_ID, "Link ID"},
|
|
{MPLS_LINK_LOCAL_IF, "Local Interface IP Address"},
|
|
{MPLS_LINK_REMOTE_IF, "Remote Interface IP Address"},
|
|
{MPLS_LINK_TE_METRIC, "Traffic Engineering Metric"},
|
|
{MPLS_LINK_MAX_BW, "Maximum Bandwidth"},
|
|
{MPLS_LINK_MAX_RES_BW, "Maximum Reservable Bandwidth"},
|
|
{MPLS_LINK_UNRES_BW, "Unreserved Bandwidth"},
|
|
{MPLS_LINK_COLOR, "Resource Class/Color"},
|
|
{MPLS_LINK_LOCAL_REMOTE_ID, "Link Local/Remote Identifier"},
|
|
{MPLS_LINK_PROTECTION, "Link Protection Type"},
|
|
{MPLS_LINK_IF_SWITCHING_DESC, "Interface Switching Capability Descriptor"},
|
|
{MPLS_LINK_SHARED_RISK_GROUP, "Shared Risk Link Group"},
|
|
{OIF_LOCAL_NODE_ID, "Local Node ID"},
|
|
{OIF_REMOTE_NODE_ID, "Remote Node ID"},
|
|
{OIF_SONET_SDH_SWITCHING_CAPABILITY, "Sonet/SDH Interface Switching Capability"},
|
|
{0, NULL},
|
|
};
|
|
|
|
static const value_string oif_stlv_str[] = {
|
|
{OIF_TNA_IPv4_ADDRESS, "TNA address"},
|
|
{OIF_NODE_ID, "Node ID"},
|
|
{OIF_TNA_IPv6_ADDRESS, "TNA address"},
|
|
{OIF_TNA_NSAP_ADDRESS, "TNA address"},
|
|
{0, NULL},
|
|
};
|
|
|
|
/*
|
|
* Dissect MPLS/TE opaque LSA
|
|
*/
|
|
static void
|
|
dissect_ospf_lsa_mpls(tvbuff_t *tvb, int offset, proto_tree *tree,
|
|
guint32 length)
|
|
{
|
|
proto_item *ti;
|
|
proto_tree *mpls_tree;
|
|
proto_tree *tlv_tree;
|
|
proto_tree *stlv_tree;
|
|
proto_tree *stlv_admingrp_tree = NULL;
|
|
|
|
int tlv_type;
|
|
int tlv_length;
|
|
int tlv_end_offset;
|
|
|
|
int stlv_type, stlv_len, stlv_offset;
|
|
const char *stlv_name;
|
|
guint32 stlv_admingrp, mask;
|
|
int i;
|
|
guint8 switch_cap;
|
|
|
|
ti = proto_tree_add_text(tree, tvb, offset, length,
|
|
"MPLS Traffic Engineering LSA");
|
|
proto_tree_add_item_hidden(tree, ospf_filter[OSPFF_LS_MPLS],
|
|
tvb, offset, 2, FALSE);
|
|
mpls_tree = proto_item_add_subtree(ti, ett_ospf_lsa_mpls);
|
|
|
|
while (length != 0) {
|
|
tlv_type = tvb_get_ntohs(tvb, offset);
|
|
tlv_length = tvb_get_ntohs(tvb, offset + 2);
|
|
tlv_end_offset = offset + tlv_length + 4;
|
|
|
|
switch (tlv_type) {
|
|
|
|
case MPLS_TLV_ROUTER:
|
|
ti = proto_tree_add_text(mpls_tree, tvb, offset, tlv_length+4,
|
|
"Router Address: %s",
|
|
ip_to_str(tvb_get_ptr(tvb, offset+4, 4)));
|
|
tlv_tree = proto_item_add_subtree(ti, ett_ospf_lsa_mpls_router);
|
|
proto_tree_add_text(tlv_tree, tvb, offset, 2, "TLV Type: 1 - Router Address");
|
|
proto_tree_add_text(tlv_tree, tvb, offset+2, 2, "TLV Length: %u",
|
|
tlv_length);
|
|
proto_tree_add_item(tlv_tree, ospf_filter[OSPFF_LS_MPLS_ROUTERID],
|
|
tvb, offset+4, 4, FALSE);
|
|
break;
|
|
|
|
case MPLS_TLV_LINK:
|
|
ti = proto_tree_add_text(mpls_tree, tvb, offset, tlv_length+4,
|
|
"Link Information");
|
|
tlv_tree = proto_item_add_subtree(ti, ett_ospf_lsa_mpls_link);
|
|
proto_tree_add_text(tlv_tree, tvb, offset, 2, "TLV Type: 2 - Link Information");
|
|
proto_tree_add_text(tlv_tree, tvb, offset+2, 2, "TLV Length: %u",
|
|
tlv_length);
|
|
stlv_offset = offset + 4;
|
|
|
|
/* Walk down the sub-TLVs for link information */
|
|
while (stlv_offset < tlv_end_offset) {
|
|
stlv_type = tvb_get_ntohs(tvb, stlv_offset);
|
|
stlv_len = tvb_get_ntohs(tvb, stlv_offset + 2);
|
|
stlv_name = val_to_str(stlv_type, mpls_link_stlv_str, "Unknown sub-TLV");
|
|
switch (stlv_type) {
|
|
|
|
case MPLS_LINK_TYPE:
|
|
ti = proto_tree_add_text(tlv_tree, tvb, stlv_offset, stlv_len+4,
|
|
"%s: %u - %s", stlv_name,
|
|
tvb_get_guint8(tvb, stlv_offset + 4),
|
|
val_to_str(tvb_get_guint8(tvb, stlv_offset + 4),
|
|
mpls_link_stlv_ltype_str, "Unknown Link Type"));
|
|
stlv_tree = proto_item_add_subtree(ti, ett_ospf_lsa_mpls_link_stlv);
|
|
proto_tree_add_text(stlv_tree, tvb, stlv_offset, 2,
|
|
"TLV Type: %u: %s", stlv_type, stlv_name);
|
|
proto_tree_add_text(stlv_tree, tvb, stlv_offset+2, 2, "TLV Length: %u",
|
|
stlv_len);
|
|
proto_tree_add_item(stlv_tree, ospf_filter[OSPFF_LS_MPLS_LINKTYPE],
|
|
tvb, stlv_offset+4, 1,FALSE);
|
|
break;
|
|
|
|
case MPLS_LINK_ID:
|
|
ti = proto_tree_add_text(tlv_tree, tvb, stlv_offset, stlv_len+4,
|
|
"%s: %s", stlv_name,
|
|
ip_to_str(tvb_get_ptr(tvb, stlv_offset + 4, 4)));
|
|
stlv_tree = proto_item_add_subtree(ti, ett_ospf_lsa_mpls_link_stlv);
|
|
proto_tree_add_text(stlv_tree, tvb, stlv_offset, 2,
|
|
"TLV Type: %u: %s", stlv_type, stlv_name);
|
|
proto_tree_add_text(stlv_tree, tvb, stlv_offset+2, 2, "TLV Length: %u",
|
|
stlv_len);
|
|
proto_tree_add_item(stlv_tree, ospf_filter[OSPFF_LS_MPLS_LINKID],
|
|
tvb, stlv_offset+4, 4, FALSE);
|
|
break;
|
|
|
|
case MPLS_LINK_LOCAL_IF:
|
|
case MPLS_LINK_REMOTE_IF:
|
|
ti = proto_tree_add_text(tlv_tree, tvb, stlv_offset, stlv_len+4,
|
|
"%s", stlv_name);
|
|
stlv_tree = proto_item_add_subtree(ti, ett_ospf_lsa_mpls_link_stlv);
|
|
proto_tree_add_text(stlv_tree, tvb, stlv_offset, 2,
|
|
"TLV Type: %u: %s", stlv_type, stlv_name);
|
|
proto_tree_add_text(stlv_tree, tvb, stlv_offset+2, 2, "TLV Length: %u",
|
|
stlv_len);
|
|
/* The Local/Remote Interface IP Address sub-TLV is TLV type 3/4, and is 4N
|
|
octets in length, where N is the number of neighbor addresses. */
|
|
for (i=0; i < stlv_len; i+=4)
|
|
proto_tree_add_item(stlv_tree,
|
|
stlv_type==MPLS_LINK_LOCAL_IF ?
|
|
ospf_filter[OSPFF_LS_MPLS_LOCAL_ADDR] :
|
|
ospf_filter[OSPFF_LS_MPLS_REMOTE_ADDR],
|
|
tvb, stlv_offset+4+i, 4, FALSE);
|
|
break;
|
|
|
|
case MPLS_LINK_TE_METRIC:
|
|
ti = proto_tree_add_text(tlv_tree, tvb, stlv_offset, stlv_len+4,
|
|
"%s: %u", stlv_name,
|
|
tvb_get_ntohl(tvb, stlv_offset + 4));
|
|
stlv_tree = proto_item_add_subtree(ti, ett_ospf_lsa_mpls_link_stlv);
|
|
proto_tree_add_text(stlv_tree, tvb, stlv_offset, 2,
|
|
"TLV Type: %u: %s", stlv_type, stlv_name);
|
|
proto_tree_add_text(stlv_tree, tvb, stlv_offset+2, 2, "TLV Length: %u",
|
|
stlv_len);
|
|
proto_tree_add_text(stlv_tree, tvb, stlv_offset+4, 4, "%s: %u", stlv_name,
|
|
tvb_get_ntohl(tvb, stlv_offset + 4));
|
|
break;
|
|
|
|
case MPLS_LINK_COLOR:
|
|
ti = proto_tree_add_text(tlv_tree, tvb, stlv_offset, stlv_len+4,
|
|
"%s: 0x%08x", stlv_name,
|
|
tvb_get_ntohl(tvb, stlv_offset + 4));
|
|
stlv_tree = proto_item_add_subtree(ti, ett_ospf_lsa_mpls_link_stlv);
|
|
proto_tree_add_text(stlv_tree, tvb, stlv_offset, 2,
|
|
"TLV Type: %u: %s", stlv_type, stlv_name);
|
|
proto_tree_add_text(stlv_tree, tvb, stlv_offset+2, 2, "TLV Length: %u",
|
|
stlv_len);
|
|
stlv_admingrp = tvb_get_ntohl(tvb, stlv_offset + 4);
|
|
mask = 1;
|
|
ti = proto_tree_add_item(stlv_tree, ospf_filter[OSPFF_LS_MPLS_LINKCOLOR],
|
|
tvb, stlv_offset+4, 4, FALSE);
|
|
stlv_admingrp_tree = proto_item_add_subtree(ti, ett_ospf_lsa_mpls_link_stlv_admingrp);
|
|
if (stlv_admingrp_tree == NULL)
|
|
return;
|
|
for (i = 0 ; i < 32 ; i++) {
|
|
if ((stlv_admingrp & mask) != 0) {
|
|
proto_tree_add_text(stlv_admingrp_tree, tvb, stlv_offset+4,
|
|
4, "Group %d", i);
|
|
}
|
|
mask <<= 1;
|
|
}
|
|
break;
|
|
|
|
case MPLS_LINK_MAX_BW:
|
|
case MPLS_LINK_MAX_RES_BW:
|
|
ti = proto_tree_add_text(tlv_tree, tvb, stlv_offset, stlv_len+4,
|
|
"%s: %.10g bytes/s (%.0f bits/s)", stlv_name,
|
|
tvb_get_ntohieee_float(tvb, stlv_offset + 4),
|
|
tvb_get_ntohieee_float(tvb, stlv_offset + 4) * 8.0);
|
|
stlv_tree = proto_item_add_subtree(ti, ett_ospf_lsa_mpls_link_stlv);
|
|
proto_tree_add_text(stlv_tree, tvb, stlv_offset, 2,
|
|
"TLV Type: %u: %s", stlv_type, stlv_name);
|
|
proto_tree_add_text(stlv_tree, tvb, stlv_offset+2, 2, "TLV Length: %u",
|
|
stlv_len);
|
|
proto_tree_add_text(stlv_tree, tvb, stlv_offset+4, 4, "%s: %.10g bytes/s (%.0f bits/s)", stlv_name,
|
|
tvb_get_ntohieee_float(tvb, stlv_offset + 4),
|
|
tvb_get_ntohieee_float(tvb, stlv_offset + 4) * 8.0);
|
|
break;
|
|
|
|
case MPLS_LINK_UNRES_BW:
|
|
ti = proto_tree_add_text(tlv_tree, tvb, stlv_offset, stlv_len+4,
|
|
"%s", stlv_name);
|
|
stlv_tree = proto_item_add_subtree(ti, ett_ospf_lsa_mpls_link_stlv);
|
|
proto_tree_add_text(stlv_tree, tvb, stlv_offset, 2,
|
|
"TLV Type: %u: %s", stlv_type, stlv_name);
|
|
proto_tree_add_text(stlv_tree, tvb, stlv_offset+2, 2, "TLV Length: %u",
|
|
stlv_len);
|
|
for (i = 0; i < 8; i++) {
|
|
proto_tree_add_text(stlv_tree, tvb, stlv_offset+4+(i*4), 4,
|
|
"Pri %d: %.10g bytes/s (%.0f bits/s)", i,
|
|
tvb_get_ntohieee_float(tvb, stlv_offset + 4 + i*4),
|
|
tvb_get_ntohieee_float(tvb, stlv_offset + 4 + i*4) * 8.0);
|
|
}
|
|
break;
|
|
|
|
case MPLS_LINK_LOCAL_REMOTE_ID:
|
|
ti = proto_tree_add_text(tlv_tree, tvb, stlv_offset, stlv_len+4,
|
|
"%s: %d (0x%x) - %d (0x%x)", stlv_name,
|
|
tvb_get_ntohl(tvb, stlv_offset + 4),
|
|
tvb_get_ntohl(tvb, stlv_offset + 4),
|
|
tvb_get_ntohl(tvb, stlv_offset + 8),
|
|
tvb_get_ntohl(tvb, stlv_offset + 8));
|
|
stlv_tree = proto_item_add_subtree(ti, ett_ospf_lsa_mpls_link_stlv);
|
|
|
|
proto_tree_add_text(stlv_tree, tvb, stlv_offset, 2,
|
|
"TLV Type: %u: %s", stlv_type, stlv_name);
|
|
proto_tree_add_text(stlv_tree, tvb, stlv_offset+2, 2, "TLV Length: %u",
|
|
stlv_len);
|
|
proto_tree_add_item(stlv_tree,
|
|
ospf_filter[OSPFF_LS_MPLS_LOCAL_IFID],
|
|
tvb, stlv_offset+4, 4, FALSE);
|
|
proto_tree_add_item(stlv_tree,
|
|
ospf_filter[OSPFF_LS_MPLS_REMOTE_IFID],
|
|
tvb, stlv_offset+8, 4, FALSE);
|
|
break;
|
|
|
|
case MPLS_LINK_IF_SWITCHING_DESC:
|
|
ti = proto_tree_add_text(tlv_tree, tvb, stlv_offset, stlv_len+4,
|
|
"%s", stlv_name);
|
|
stlv_tree = proto_item_add_subtree(ti, ett_ospf_lsa_mpls_link_stlv);
|
|
proto_tree_add_text(stlv_tree, tvb, stlv_offset, 2,
|
|
"TLV Type: %u: %s", stlv_type, stlv_name);
|
|
proto_tree_add_text(stlv_tree, tvb, stlv_offset+2, 2, "TLV Length: %u",
|
|
stlv_len);
|
|
switch_cap = tvb_get_guint8 (tvb, stlv_offset+4);
|
|
proto_tree_add_text(stlv_tree, tvb, stlv_offset+4, 1, "Switching Type: %s",
|
|
val_to_str(tvb_get_guint8(tvb,stlv_offset+4),
|
|
gmpls_switching_type_str, "Unknown (%d)"));
|
|
proto_tree_add_text(stlv_tree, tvb, stlv_offset+5, 1, "Encoding: %s",
|
|
val_to_str(tvb_get_guint8(tvb,stlv_offset+5),
|
|
gmpls_lsp_enc_str, "Unknown (%d)"));
|
|
for (i = 0; i < 8; i++) {
|
|
proto_tree_add_text(stlv_tree, tvb, stlv_offset+8+(i*4), 4,
|
|
"Pri %d: %.10g bytes/s (%.0f bits/s)", i,
|
|
tvb_get_ntohieee_float(tvb, stlv_offset + 8 + i*4),
|
|
tvb_get_ntohieee_float(tvb, stlv_offset + 8 + i*4) * 8.0);
|
|
}
|
|
if (switch_cap >=1 && switch_cap <=4) { /* PSC-1 .. PSC-4 */
|
|
proto_tree_add_text(stlv_tree, tvb, stlv_offset+40, 4,
|
|
"Minimum LSP bandwidth: %.10g bytes/s (%.0f bits/s)",
|
|
tvb_get_ntohieee_float(tvb, stlv_offset + 40),
|
|
tvb_get_ntohieee_float(tvb, stlv_offset + 40) * 8.0);
|
|
proto_tree_add_text(stlv_tree, tvb, stlv_offset+44, 2,
|
|
"Interface MTU: %d", tvb_get_ntohs(tvb, stlv_offset+44));
|
|
}
|
|
|
|
if (switch_cap == 100) { /* TDM */
|
|
proto_tree_add_text(stlv_tree, tvb, stlv_offset+40, 4,
|
|
"Minimum LSP bandwidth: %.10g bytes/s (%.0f bits/s)",
|
|
tvb_get_ntohieee_float(tvb, stlv_offset + 40),
|
|
tvb_get_ntohieee_float(tvb, stlv_offset + 40) * 8.0);
|
|
proto_tree_add_text(stlv_tree, tvb, stlv_offset+44, 2,
|
|
"SONET/SDH: %s",
|
|
tvb_get_guint8(tvb, stlv_offset+44) ?
|
|
"Arbitrary" : "Standard");
|
|
}
|
|
break;
|
|
case MPLS_LINK_PROTECTION:
|
|
ti = proto_tree_add_text(tlv_tree, tvb, stlv_offset, stlv_len+4,
|
|
"%s", stlv_name);
|
|
stlv_tree = proto_item_add_subtree(ti, ett_ospf_lsa_mpls_link_stlv);
|
|
proto_tree_add_text(stlv_tree, tvb, stlv_offset, 2,
|
|
"TLV Type: %u: %s", stlv_type, stlv_name);
|
|
proto_tree_add_text(stlv_tree, tvb, stlv_offset+2, 2, "TLV Length: %u",
|
|
stlv_len);
|
|
proto_tree_add_text(stlv_tree, tvb, stlv_offset+4, 1, "Protection Capability: %s (0x%x)",
|
|
val_to_str(tvb_get_guint8(tvb,stlv_offset+4), gmpls_protection_cap_str, "Unknown (%d)"),tvb_get_guint8(tvb,stlv_offset+4));
|
|
break;
|
|
|
|
case MPLS_LINK_SHARED_RISK_GROUP:
|
|
ti = proto_tree_add_text(tlv_tree, tvb, stlv_offset, stlv_len+4,
|
|
"%s", stlv_name);
|
|
stlv_tree = proto_item_add_subtree(ti, ett_ospf_lsa_mpls_link_stlv);
|
|
proto_tree_add_text(stlv_tree, tvb, stlv_offset, 2,
|
|
"TLV Type: %u: %s", stlv_type, stlv_name);
|
|
proto_tree_add_text(stlv_tree, tvb, stlv_offset+2, 2, "TLV Length: %u",
|
|
stlv_len);
|
|
for (i=0; i < stlv_len; i+=4)
|
|
proto_tree_add_text(stlv_tree, tvb, stlv_offset+4+i, 4, "Shared Risk Link Group: %u",
|
|
tvb_get_ntohl(tvb,stlv_offset+4+i));
|
|
break;
|
|
|
|
case OIF_LOCAL_NODE_ID:
|
|
ti = proto_tree_add_text(tlv_tree, tvb, stlv_offset, stlv_len+4,
|
|
"%s: %s", stlv_name,
|
|
ip_to_str(tvb_get_ptr(tvb, stlv_offset + 4, 4)));
|
|
stlv_tree = proto_item_add_subtree(ti, ett_ospf_lsa_mpls_link_stlv);
|
|
proto_tree_add_text(stlv_tree, tvb, stlv_offset, 2,
|
|
"TLV Type: %u: %s", stlv_type, stlv_name);
|
|
proto_tree_add_text(stlv_tree, tvb, stlv_offset+2, 2, "TLV Length: %u",
|
|
stlv_len);
|
|
proto_tree_add_text(stlv_tree, tvb, stlv_offset+4, 4, "Local Node ID: %s",
|
|
ip_to_str(tvb_get_ptr(tvb, stlv_offset + 4, 4)));
|
|
break;
|
|
|
|
case OIF_REMOTE_NODE_ID:
|
|
ti = proto_tree_add_text(tlv_tree, tvb, stlv_offset, stlv_len+4,
|
|
"%s: %s", stlv_name,
|
|
ip_to_str(tvb_get_ptr(tvb, stlv_offset + 4, 4)));
|
|
stlv_tree = proto_item_add_subtree(ti, ett_ospf_lsa_mpls_link_stlv);
|
|
proto_tree_add_text(stlv_tree, tvb, stlv_offset, 2,
|
|
"TLV Type: %u: %s", stlv_type, stlv_name);
|
|
proto_tree_add_text(stlv_tree, tvb, stlv_offset+2, 2, "TLV Length: %u",
|
|
stlv_len);
|
|
proto_tree_add_text(stlv_tree, tvb, stlv_offset+4, 4, "Remote Node ID: %s",
|
|
ip_to_str(tvb_get_ptr(tvb, stlv_offset + 4, 4)));
|
|
break;
|
|
|
|
case OIF_SONET_SDH_SWITCHING_CAPABILITY:
|
|
ti = proto_tree_add_text(tlv_tree, tvb, stlv_offset, stlv_len+4, "%s", stlv_name);
|
|
stlv_tree = proto_item_add_subtree(ti, ett_ospf_lsa_mpls_link_stlv);
|
|
proto_tree_add_text(stlv_tree, tvb, stlv_offset, 2,
|
|
"TLV Type: %u: %s", stlv_type, stlv_name);
|
|
proto_tree_add_text(stlv_tree, tvb, stlv_offset+2, 2, "TLV Length: %u",
|
|
stlv_len);
|
|
proto_tree_add_text(stlv_tree, tvb, stlv_offset+4, 1, "Switching Cap: %s",
|
|
val_to_str(tvb_get_guint8 (tvb, stlv_offset+4),
|
|
gmpls_switching_type_str, "Unknown (%d)"));
|
|
proto_tree_add_text(stlv_tree, tvb, stlv_offset+5, 1, "Encoding: %s",
|
|
val_to_str(tvb_get_guint8(tvb,stlv_offset+5),
|
|
gmpls_lsp_enc_str, "Unknown (%d)"));
|
|
for (i = 0; i < (stlv_len - 4) / 4; i++) {
|
|
proto_tree_add_text(stlv_tree, tvb, stlv_offset+8+(i*4), 4,
|
|
"%s: %d free timeslots",
|
|
val_to_str(tvb_get_guint8(tvb, stlv_offset+8+(i*4)),
|
|
gmpls_sonet_signal_type_str,
|
|
"Unknown Signal Type (%d)"),
|
|
tvb_get_ntoh24(tvb, stlv_offset + 9 + i*4));
|
|
}
|
|
|
|
break;
|
|
default:
|
|
ti = proto_tree_add_text(tlv_tree, tvb, stlv_offset, stlv_len+4,
|
|
"Unknown Link sub-TLV: %u", stlv_type);
|
|
stlv_tree = proto_item_add_subtree(ti, ett_ospf_lsa_mpls_link_stlv);
|
|
proto_tree_add_text(stlv_tree, tvb, stlv_offset, 2,
|
|
"TLV Type: %u: %s", stlv_type, stlv_name);
|
|
proto_tree_add_text(stlv_tree, tvb, stlv_offset+2, 2, "TLV Length: %u",
|
|
stlv_len);
|
|
proto_tree_add_text(stlv_tree, tvb, stlv_offset+4, stlv_len,
|
|
"TLV Value");
|
|
break;
|
|
}
|
|
stlv_offset += ((stlv_len+4+3)/4)*4;
|
|
}
|
|
break;
|
|
|
|
case OIF_TLV_TNA:
|
|
ti = proto_tree_add_text(mpls_tree, tvb, offset, tlv_length+4,
|
|
"TNA Information");
|
|
tlv_tree = proto_item_add_subtree(ti, ett_ospf_lsa_oif_tna);
|
|
proto_tree_add_text(tlv_tree, tvb, offset, 2, "TLV Type: 32768 - TNA Information");
|
|
proto_tree_add_text(tlv_tree, tvb, offset+2, 2, "TLV Length: %u",
|
|
tlv_length);
|
|
stlv_offset = offset + 4;
|
|
|
|
/* Walk down the sub-TLVs for TNA information */
|
|
while (stlv_offset < tlv_end_offset) {
|
|
stlv_type = tvb_get_ntohs(tvb, stlv_offset);
|
|
stlv_len = tvb_get_ntohs(tvb, stlv_offset + 2);
|
|
stlv_name = val_to_str(stlv_type, oif_stlv_str, "Unknown sub-TLV");
|
|
switch (stlv_type) {
|
|
|
|
case OIF_NODE_ID:
|
|
ti = proto_tree_add_text(tlv_tree, tvb, stlv_offset, stlv_len+4,
|
|
"%s: %s", stlv_name,
|
|
ip_to_str(tvb_get_ptr(tvb, stlv_offset + 4, 4)));
|
|
stlv_tree = proto_item_add_subtree(ti, ett_ospf_lsa_oif_tna_stlv);
|
|
proto_tree_add_text(stlv_tree, tvb, stlv_offset, 2,
|
|
"TLV Type: %u: %s", stlv_type, stlv_name);
|
|
proto_tree_add_text(stlv_tree, tvb, stlv_offset+2, 2, "TLV Length: %u",
|
|
stlv_len);
|
|
proto_tree_add_text(stlv_tree, tvb, stlv_offset+4, 4, "%s: %s", stlv_name,
|
|
ip_to_str(tvb_get_ptr(tvb, stlv_offset + 4, 4)));
|
|
break;
|
|
|
|
case OIF_TNA_IPv4_ADDRESS:
|
|
ti = proto_tree_add_text(tlv_tree, tvb, stlv_offset, stlv_len+4,
|
|
"%s (IPv4): %s", stlv_name,
|
|
ip_to_str(tvb_get_ptr(tvb, stlv_offset + 8, 4)));
|
|
stlv_tree = proto_item_add_subtree(ti, ett_ospf_lsa_oif_tna_stlv);
|
|
proto_tree_add_text(stlv_tree, tvb, stlv_offset, 2,
|
|
"TLV Type: %u: %s (IPv4)", stlv_type, stlv_name);
|
|
proto_tree_add_text(stlv_tree, tvb, stlv_offset+2, 2, "TLV Length: %u", stlv_len);
|
|
proto_tree_add_text(stlv_tree, tvb, stlv_offset+4, 1, "Addr Length: %u",
|
|
tvb_get_guint8 (tvb, stlv_offset+4));
|
|
proto_tree_add_text(stlv_tree, tvb, stlv_offset+8, stlv_len - 4, "TNA Addr: %s",
|
|
ip_to_str(tvb_get_ptr(tvb, stlv_offset + 8, 4)));
|
|
break;
|
|
|
|
case OIF_TNA_IPv6_ADDRESS:
|
|
ti = proto_tree_add_text(tlv_tree, tvb, stlv_offset, stlv_len+4,
|
|
"%s (IPv6): %s", stlv_name,
|
|
ip6_to_str((const struct e_in6_addr *)
|
|
tvb_get_ptr(tvb, stlv_offset + 8, 16)));
|
|
stlv_tree = proto_item_add_subtree(ti, ett_ospf_lsa_oif_tna_stlv);
|
|
proto_tree_add_text(stlv_tree, tvb, stlv_offset, 2,
|
|
"TLV Type: %u: %s (IPv6)", stlv_type, stlv_name);
|
|
proto_tree_add_text(stlv_tree, tvb, stlv_offset+2, 2, "TLV Length: %u", stlv_len);
|
|
proto_tree_add_text(stlv_tree, tvb, stlv_offset+4, 1, "Addr Length: %u",
|
|
tvb_get_guint8 (tvb, stlv_offset+4));
|
|
proto_tree_add_text(stlv_tree, tvb, stlv_offset+8, stlv_len - 4, "TNA Addr: %s",
|
|
ip6_to_str((const struct e_in6_addr *)
|
|
tvb_get_ptr(tvb, stlv_offset + 8, 16)));
|
|
break;
|
|
|
|
case OIF_TNA_NSAP_ADDRESS:
|
|
ti = proto_tree_add_text(tlv_tree, tvb, stlv_offset, stlv_len+4,
|
|
"%s (NSAP): %s", stlv_name,
|
|
tvb_bytes_to_str (tvb, stlv_offset + 8, stlv_len - 4));
|
|
stlv_tree = proto_item_add_subtree(ti, ett_ospf_lsa_oif_tna_stlv);
|
|
proto_tree_add_text(stlv_tree, tvb, stlv_offset, 2,
|
|
"TLV Type: %u: %s (NSAP)", stlv_type, stlv_name);
|
|
proto_tree_add_text(stlv_tree, tvb, stlv_offset+2, 2, "TLV Length: %u", stlv_len);
|
|
proto_tree_add_text(stlv_tree, tvb, stlv_offset+4, 1, "Addr Length: %u",
|
|
tvb_get_guint8 (tvb, stlv_offset+4));
|
|
proto_tree_add_text(stlv_tree, tvb, stlv_offset+8, stlv_len - 4, "TNA Addr: %s",
|
|
tvb_bytes_to_str(tvb, stlv_offset+8, stlv_len - 4));
|
|
break;
|
|
|
|
default:
|
|
proto_tree_add_text(tlv_tree, tvb, stlv_offset, stlv_len+4,
|
|
"Unknown Link sub-TLV: %u", stlv_type);
|
|
break;
|
|
}
|
|
stlv_offset += ((stlv_len+4+3)/4)*4;
|
|
}
|
|
break;
|
|
default:
|
|
ti = proto_tree_add_text(mpls_tree, tvb, offset, tlv_length+4,
|
|
"Unknown LSA: %u", tlv_type);
|
|
tlv_tree = proto_item_add_subtree(ti, ett_ospf_lsa_mpls_link);
|
|
proto_tree_add_text(tlv_tree, tvb, offset, 2, "TLV Type: %u - Unknown",
|
|
tlv_type);
|
|
proto_tree_add_text(tlv_tree, tvb, offset+2, 2, "TLV Length: %u",
|
|
tlv_length);
|
|
proto_tree_add_text(tlv_tree, tvb, offset+4, tlv_length, "TLV Data");
|
|
break;
|
|
}
|
|
|
|
offset += tlv_length + 4;
|
|
length -= tlv_length + 4;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Dissect opaque LSAs
|
|
*/
|
|
static void
|
|
dissect_ospf_lsa_opaque(tvbuff_t *tvb, int offset, proto_tree *tree,
|
|
guint8 ls_id_type, guint32 length)
|
|
{
|
|
switch (ls_id_type) {
|
|
|
|
case OSPF_LSA_MPLS_TE:
|
|
dissect_ospf_lsa_mpls(tvb, offset, tree, length);
|
|
break;
|
|
|
|
default:
|
|
proto_tree_add_text(tree, tvb, offset, length,
|
|
"Unknown LSA Type %u", ls_id_type);
|
|
break;
|
|
} /* switch on opaque LSA id */
|
|
}
|
|
|
|
static int
|
|
dissect_ospf_v2_lsa(tvbuff_t *tvb, int offset, proto_tree *tree,
|
|
gboolean disassemble_body)
|
|
{
|
|
proto_tree *ospf_lsa_tree;
|
|
proto_item *ti;
|
|
|
|
guint8 ls_type;
|
|
guint16 ls_length;
|
|
int end_offset;
|
|
guint16 nr_links;
|
|
guint16 nr_tos;
|
|
|
|
/* router LSA */
|
|
guint8 link_type;
|
|
guint16 link_counter;
|
|
guint8 tos_counter;
|
|
const char *link_type_str;
|
|
const char *link_type_short_str;
|
|
const char *link_id;
|
|
|
|
/* AS-external LSA */
|
|
guint8 options;
|
|
|
|
/* opaque LSA */
|
|
guint8 ls_id_type;
|
|
|
|
ls_type = tvb_get_guint8(tvb, offset + 3);
|
|
ls_length = tvb_get_ntohs(tvb, offset + 18);
|
|
end_offset = offset + ls_length;
|
|
|
|
if (disassemble_body) {
|
|
ti = proto_tree_add_text(tree, tvb, offset, ls_length,
|
|
"LS Type: %s",
|
|
val_to_str(ls_type, ls_type_vals, "Unknown (%d)"));
|
|
} else {
|
|
ti = proto_tree_add_text(tree, tvb, offset, OSPF_LSA_HEADER_LENGTH,
|
|
"LSA Header");
|
|
}
|
|
ospf_lsa_tree = proto_item_add_subtree(ti, ett_ospf_lsa);
|
|
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset, 2, "LS Age: %u seconds",
|
|
tvb_get_ntohs(tvb, offset));
|
|
dissect_ospf_bitfield(ospf_lsa_tree, tvb, offset + 2, &bfinfo_v2_options);
|
|
proto_tree_add_item(ospf_lsa_tree, ospf_filter[OSPFF_LS_TYPE], tvb,
|
|
offset + 3, 1, FALSE);
|
|
proto_tree_add_item_hidden(ospf_lsa_tree,
|
|
ospf_filter[ospf_ls_type_to_filter(ls_type)], tvb,
|
|
offset + 3, 1, FALSE);
|
|
|
|
if (is_opaque(ls_type)) {
|
|
ls_id_type = tvb_get_guint8(tvb, offset + 4);
|
|
proto_tree_add_uint(ospf_lsa_tree, ospf_filter[OSPFF_LS_OPAQUE_TYPE],
|
|
tvb, offset + 4, 1, ls_id_type);
|
|
|
|
switch (ls_id_type) {
|
|
|
|
case OSPF_LSA_MPLS_TE:
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset + 5, 1, "Link State ID TE-LSA Reserved: %u",
|
|
tvb_get_guint8(tvb, offset + 5));
|
|
proto_tree_add_item(ospf_lsa_tree, ospf_filter[OSPFF_LS_MPLS_TE_INSTANCE],
|
|
tvb, offset + 6, 2, FALSE);
|
|
break;
|
|
|
|
default:
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset + 5, 3, "Link State ID Opaque ID: %u",
|
|
tvb_get_ntoh24(tvb, offset + 5));
|
|
break;
|
|
}
|
|
} else {
|
|
ls_id_type = 0;
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset + 4, 4, "Link State ID: %s",
|
|
ip_to_str(tvb_get_ptr(tvb, offset + 4, 4)));
|
|
}
|
|
|
|
proto_tree_add_item(ospf_lsa_tree, ospf_filter[OSPFF_ADV_ROUTER],
|
|
tvb, offset + 8, 4, FALSE);
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset + 12, 4, "LS Sequence Number: 0x%08x",
|
|
tvb_get_ntohl(tvb, offset + 12));
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset + 16, 2, "LS Checksum: %04x",
|
|
tvb_get_ntohs(tvb, offset + 16));
|
|
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset + 18, 2, "Length: %u",
|
|
ls_length);
|
|
|
|
/* skip past the LSA header to the body */
|
|
offset += OSPF_LSA_HEADER_LENGTH;
|
|
if (ls_length <= OSPF_LSA_HEADER_LENGTH)
|
|
return offset; /* no data, or bogus length */
|
|
ls_length -= OSPF_LSA_HEADER_LENGTH;
|
|
|
|
if (!disassemble_body)
|
|
return offset;
|
|
|
|
switch (ls_type){
|
|
|
|
case OSPF_LSTYPE_ROUTER:
|
|
/* flags field in an router-lsa */
|
|
dissect_ospf_bitfield(ospf_lsa_tree, tvb, offset, &bfinfo_v2_router_lsa_flags);
|
|
|
|
nr_links = tvb_get_ntohs(tvb, offset + 2);
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset + 2, 2, "Number of Links: %u",
|
|
nr_links);
|
|
offset += 4;
|
|
/* nr_links links follow
|
|
* maybe we should put each of the links into its own subtree ???
|
|
*/
|
|
for (link_counter = 1; link_counter <= nr_links; link_counter++) {
|
|
proto_tree *ospf_lsa_router_link_tree;
|
|
proto_item *ti_local;
|
|
|
|
|
|
/* check the Link Type and ID */
|
|
link_type = tvb_get_guint8(tvb, offset + 8);
|
|
switch (link_type) {
|
|
|
|
case OSPF_LINK_PTP:
|
|
link_type_str="Point-to-point connection to another router";
|
|
link_type_short_str="PTP";
|
|
link_id="Neighboring router's Router ID";
|
|
break;
|
|
|
|
case OSPF_LINK_TRANSIT:
|
|
link_type_str="Connection to a transit network";
|
|
link_type_short_str="Transit";
|
|
link_id="IP address of Designated Router";
|
|
break;
|
|
|
|
case OSPF_LINK_STUB:
|
|
link_type_str="Connection to a stub network";
|
|
link_type_short_str="Stub";
|
|
link_id="IP network/subnet number";
|
|
break;
|
|
|
|
case OSPF_LINK_VIRTUAL:
|
|
link_type_str="Virtual link";
|
|
link_type_short_str="Virtual";
|
|
link_id="Neighboring router's Router ID";
|
|
break;
|
|
|
|
default:
|
|
link_type_str="Unknown link type";
|
|
link_type_short_str="Unknown";
|
|
link_id="Unknown link ID";
|
|
break;
|
|
}
|
|
|
|
nr_tos = tvb_get_guint8(tvb, offset + 9);
|
|
|
|
|
|
ti_local = proto_tree_add_text(ospf_lsa_tree, tvb, offset, 12 + 4 * nr_tos,
|
|
"Type: %-8s ID: %-15s Data: %-15s Metric: %d",
|
|
link_type_short_str,
|
|
ip_to_str(tvb_get_ptr(tvb, offset, 4)),
|
|
ip_to_str(tvb_get_ptr(tvb, offset + 4, 4)),
|
|
tvb_get_ntohs(tvb, offset + 10));
|
|
|
|
ospf_lsa_router_link_tree = proto_item_add_subtree(ti_local, ett_ospf_lsa_router_link);
|
|
|
|
proto_tree_add_text(ospf_lsa_router_link_tree, tvb, offset, 4, "%s: %s", link_id,
|
|
ip_to_str(tvb_get_ptr(tvb, offset, 4)));
|
|
|
|
/* link_data should be specified in detail (e.g. network mask) (depends on link type)*/
|
|
proto_tree_add_text(ospf_lsa_router_link_tree, tvb, offset + 4, 4, "Link Data: %s",
|
|
ip_to_str(tvb_get_ptr(tvb, offset + 4, 4)));
|
|
|
|
proto_tree_add_text(ospf_lsa_router_link_tree, tvb, offset + 8, 1, "Link Type: %u - %s",
|
|
link_type, link_type_str);
|
|
proto_tree_add_text(ospf_lsa_router_link_tree, tvb, offset + 9, 1, "Number of TOS metrics: %u",
|
|
nr_tos);
|
|
proto_tree_add_text(ospf_lsa_router_link_tree, tvb, offset + 10, 2, "TOS 0 metric: %u",
|
|
tvb_get_ntohs(tvb, offset + 10));
|
|
|
|
offset += 12;
|
|
|
|
/* nr_tos metrics may follow each link
|
|
* ATTENTION: TOS metrics are not tested (I don't have TOS
|
|
* based routing)
|
|
* please send me a mail if it is/isn't working
|
|
*/
|
|
for (tos_counter = 1; tos_counter <= nr_tos; tos_counter++) {
|
|
proto_tree_add_text(ospf_lsa_router_link_tree, tvb, offset, 4, "TOS: %u, Metric: %u",
|
|
tvb_get_guint8(tvb, offset),
|
|
tvb_get_ntohs(tvb, offset + 2));
|
|
offset += 4;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case OSPF_LSTYPE_NETWORK:
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset, 4, "Netmask: %s",
|
|
ip_to_str(tvb_get_ptr(tvb, offset, 4)));
|
|
offset += 4;
|
|
|
|
while (offset < end_offset) {
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset, 4, "Attached Router: %s",
|
|
ip_to_str(tvb_get_ptr(tvb, offset, 4)));
|
|
offset += 4;
|
|
}
|
|
break;
|
|
|
|
case OSPF_LSTYPE_SUMMERY:
|
|
/* Type 3 and 4 LSAs have the same format */
|
|
case OSPF_LSTYPE_ASBR:
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset, 4, "Netmask: %s",
|
|
ip_to_str(tvb_get_ptr(tvb, offset, 4)));
|
|
offset += 4;
|
|
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset, 4, "Metric: %u",
|
|
tvb_get_ntoh24(tvb, offset + 1));
|
|
offset += 4;
|
|
|
|
/* TOS-specific information, if any */
|
|
while (offset < end_offset) {
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset, 4, "TOS: %u, Metric: %u",
|
|
tvb_get_guint8(tvb, offset),
|
|
tvb_get_ntoh24(tvb, offset + 1));
|
|
offset += 4;
|
|
}
|
|
break;
|
|
|
|
case OSPF_LSTYPE_ASEXT:
|
|
case OSPF_LSTYPE_ASEXT7:
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset, 4, "Netmask: %s",
|
|
ip_to_str(tvb_get_ptr(tvb, offset, 4)));
|
|
offset += 4;
|
|
|
|
options = tvb_get_guint8(tvb, offset);
|
|
if (options & 0x80) { /* check wether or not E bit is set */
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset, 1,
|
|
"External Type: Type 2 (metric is larger than any other link state path)");
|
|
} else {
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset, 1,
|
|
"External Type: Type 1 (metric is specified in the same units as interface cost)");
|
|
}
|
|
/* the metric field of a AS-external LAS is specified in 3 bytes */
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset + 1, 3, "Metric: %u",
|
|
tvb_get_ntoh24(tvb, offset + 1));
|
|
offset += 4;
|
|
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset, 4, "Forwarding Address: %s",
|
|
ip_to_str(tvb_get_ptr(tvb, offset, 4)));
|
|
offset += 4;
|
|
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset, 4, "External Route Tag: %u",
|
|
tvb_get_ntohl(tvb, offset));
|
|
offset += 4;
|
|
|
|
/* TOS-specific information, if any */
|
|
while (offset < end_offset) {
|
|
options = tvb_get_guint8(tvb, offset);
|
|
if (options & 0x80) { /* check wether or not E bit is set */
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset, 1,
|
|
"External Type: Type 2 (metric is larger than any other link state path)");
|
|
} else {
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset, 1,
|
|
"External Type: Type 1 (metric is specified in the same units as interface cost)");
|
|
}
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset, 4, "TOS: %u, Metric: %u",
|
|
options & 0x7F,
|
|
tvb_get_ntoh24(tvb, offset + 1));
|
|
offset += 4;
|
|
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset, 4, "Forwarding Address: %s",
|
|
ip_to_str(tvb_get_ptr(tvb, offset, 4)));
|
|
offset += 4;
|
|
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset, 4, "External Route Tag: %u",
|
|
tvb_get_ntohl(tvb, offset));
|
|
offset += 4;
|
|
}
|
|
break;
|
|
|
|
case OSPF_LSTYPE_OP_LINKLOCAL:
|
|
case OSPF_LSTYPE_OP_AREALOCAL:
|
|
case OSPF_LSTYPE_OP_ASWIDE:
|
|
/*
|
|
* RFC 2370 opaque LSAs.
|
|
*/
|
|
dissect_ospf_lsa_opaque(tvb, offset, ospf_lsa_tree, ls_id_type,
|
|
ls_length);
|
|
offset += ls_length;
|
|
break;
|
|
|
|
default:
|
|
/* unknown LSA type */
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset, ls_length,
|
|
"Unknown LSA Type");
|
|
offset += ls_length;
|
|
break;
|
|
}
|
|
/* return the offset of the next LSA */
|
|
return offset;
|
|
}
|
|
|
|
static int
|
|
dissect_ospf_v3_lsa(tvbuff_t *tvb, int offset, proto_tree *tree,
|
|
gboolean disassemble_body)
|
|
{
|
|
proto_tree *ospf_lsa_tree;
|
|
proto_item *ti;
|
|
|
|
guint16 ls_type;
|
|
guint16 ls_length;
|
|
int end_offset;
|
|
guint8 reserved;
|
|
|
|
/* router LSA */
|
|
guint8 link_type;
|
|
const char *link_type_str;
|
|
guint32 metric;
|
|
|
|
guint8 router_priority;
|
|
guint32 number_prefixes;
|
|
guint8 prefix_length;
|
|
guint16 reserved16;
|
|
|
|
guint16 referenced_ls_type;
|
|
|
|
guint8 flags;
|
|
guint32 external_route_tag;
|
|
|
|
|
|
ls_type = tvb_get_ntohs(tvb, offset + 2);
|
|
ls_length = tvb_get_ntohs(tvb, offset + 18);
|
|
end_offset = offset + ls_length;
|
|
|
|
if (disassemble_body) {
|
|
ti = proto_tree_add_text(tree, tvb, offset, ls_length,
|
|
"%s (Type: 0x%04x)", val_to_str(ls_type, v3_ls_type_vals,"Unknown"), ls_type);
|
|
} else {
|
|
ti = proto_tree_add_text(tree, tvb, offset, OSPF_LSA_HEADER_LENGTH,
|
|
"LSA Header");
|
|
}
|
|
ospf_lsa_tree = proto_item_add_subtree(ti, ett_ospf_lsa);
|
|
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset, 2, "LS Age: %u seconds",
|
|
tvb_get_ntohs(tvb, offset));
|
|
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset + 2, 2, "LSA Type: 0x%04x (%s)",
|
|
ls_type, val_to_str(ls_type, v3_ls_type_vals,"Unkown"));
|
|
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset + 4, 4, "Link State ID: %s",
|
|
ip_to_str(tvb_get_ptr(tvb, offset + 4, 4)));
|
|
|
|
proto_tree_add_item(ospf_lsa_tree, ospf_filter[OSPFF_ADV_ROUTER],
|
|
tvb, offset + 8, 4, FALSE);
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset + 12, 4, "LS Sequence Number: 0x%08x",
|
|
tvb_get_ntohl(tvb, offset + 12));
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset + 16, 2, "LS Checksum: %04x",
|
|
tvb_get_ntohs(tvb, offset + 16));
|
|
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset + 18, 2, "Length: %u",
|
|
ls_length);
|
|
|
|
/* skip past the LSA header to the body */
|
|
offset += OSPF_LSA_HEADER_LENGTH;
|
|
ls_length -= OSPF_LSA_HEADER_LENGTH;
|
|
|
|
if (!disassemble_body)
|
|
return offset;
|
|
|
|
switch (ls_type){
|
|
|
|
|
|
case OSPF_V3_LSTYPE_ROUTER:
|
|
/* flags field in an router-lsa */
|
|
dissect_ospf_bitfield(ospf_lsa_tree, tvb, offset, &bfinfo_v3_router_lsa_flags);
|
|
|
|
/* options field in an router-lsa */
|
|
dissect_ospf_bitfield(ospf_lsa_tree, tvb, offset + 1, &bfinfo_v3_options);
|
|
|
|
/* skip the router-lsa flags and options */
|
|
offset+=4;
|
|
ls_length-=4;
|
|
|
|
if (ls_length > 0)
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset, ls_length,
|
|
"Router Interfaces:");
|
|
|
|
/* scan all router-lsa router interfaces */
|
|
/* maybe we should put each of the links into its own subtree ??? */
|
|
while (ls_length > 0 ) {
|
|
|
|
/* check the type */
|
|
link_type = tvb_get_guint8(tvb, offset);
|
|
switch (link_type) {
|
|
|
|
case OSPF_V3_LINK_PTP:
|
|
link_type_str="Point-to-point connection to another router";
|
|
break;
|
|
|
|
case OSPF_V3_LINK_TRANSIT:
|
|
link_type_str="Connection to a transit network";
|
|
break;
|
|
|
|
case OSPF_V3_LINK_RESERVED:
|
|
link_type_str="Connection to a stub network";
|
|
break;
|
|
|
|
case OSPF_V3_LINK_VIRTUAL:
|
|
link_type_str="Virtual link";
|
|
break;
|
|
|
|
default:
|
|
link_type_str="Unknown link type";
|
|
break;
|
|
}
|
|
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset, 1, "Type: %u (%s)", link_type,link_type_str);
|
|
|
|
/* reserved field */
|
|
reserved = tvb_get_guint8(tvb, offset+1);
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset+1, 1,
|
|
(reserved == 0 ? "Reserved: %u" : "Reserved: %u [incorrect, should be 0]"),reserved);
|
|
|
|
/* metric */
|
|
metric=tvb_get_ntohs(tvb, offset+2);
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset + 2, 2,"Metric: %u",metric);
|
|
|
|
/* Interface ID */
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset + 4, 4, "Interface ID: %u",
|
|
tvb_get_ntohl(tvb, offset + 4));
|
|
|
|
/* Neighbor Interface ID */
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset + 8, 4, "Neighbor Interface ID: %u",
|
|
tvb_get_ntohl(tvb, offset + 8));
|
|
|
|
/* Neighbor Router ID */
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset + 12, 4, "Neighbor Router ID: %s",
|
|
ip_to_str(tvb_get_ptr(tvb, offset + 12, 4)));
|
|
|
|
/* skip to the (possible) next entry */
|
|
offset+=16;
|
|
ls_length-=16;
|
|
|
|
}
|
|
break;
|
|
|
|
case OSPF_V3_LSTYPE_NETWORK:
|
|
|
|
/* reserved field */
|
|
reserved = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset, 1,
|
|
(reserved == 0 ? "Reserved: %u" : "Reserved: %u [incorrect, should be 0]"),reserved);
|
|
|
|
/* options field in an network-lsa */
|
|
dissect_ospf_bitfield(ospf_lsa_tree, tvb, offset + 1, &bfinfo_v3_options);
|
|
|
|
offset += 4;
|
|
ls_length-=4;
|
|
|
|
while (ls_length > 0 ) {
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset, 4, "Attached Router: %s",
|
|
ip_to_str(tvb_get_ptr(tvb, offset, 4)));
|
|
ls_length-=4;
|
|
offset += 4;
|
|
}
|
|
break;
|
|
|
|
|
|
case OSPF_V3_LSTYPE_INTER_AREA_PREFIX:
|
|
|
|
/* reserved field */
|
|
reserved = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset, 1,
|
|
(reserved == 0 ? "Reserved: %u" : "Reserved: %u [incorrect, should be 0]"),reserved);
|
|
|
|
/* metric */
|
|
metric=tvb_get_ntoh24(tvb, offset+1);
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset + 1, 3,"Metric: %u",metric);
|
|
|
|
/* prefix length */
|
|
prefix_length=tvb_get_guint8(tvb, offset+4);
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset+4, 1, "PrefixLength: %u",prefix_length);
|
|
|
|
/* prefix options */
|
|
dissect_ospf_bitfield(ospf_lsa_tree, tvb, offset+5, &bfinfo_v3_prefix_options);
|
|
|
|
/* 16 bits reserved */
|
|
reserved16=tvb_get_ntohs(tvb, offset+6);
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset+6, 2,
|
|
(reserved16 == 0 ? "Reserved: %u" : "Reserved: %u [incorrect, should be 0]"),reserved16);
|
|
|
|
offset+=8;
|
|
|
|
/* address_prefix */
|
|
dissect_ospf_v3_address_prefix(tvb, offset, prefix_length, ospf_lsa_tree);
|
|
|
|
offset+=(prefix_length+31)/32*4;
|
|
|
|
break;
|
|
|
|
|
|
case OSPF_V3_LSTYPE_INTER_AREA_ROUTER:
|
|
|
|
/* reserved field */
|
|
reserved = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset, 1,
|
|
(reserved == 0 ? "Reserved: %u" : "Reserved: %u [incorrect, should be 0]"),reserved);
|
|
|
|
/* options field in an inter-area-router-lsa */
|
|
dissect_ospf_bitfield(ospf_lsa_tree, tvb, offset + 1, &bfinfo_v3_options);
|
|
|
|
/* reserved field */
|
|
reserved = tvb_get_guint8(tvb, offset+4);
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset+4, 1,
|
|
(reserved == 0 ? "Reserved: %u" : "Reserved: %u [incorrect, should be 0]"),reserved);
|
|
|
|
/* metric */
|
|
metric=tvb_get_ntoh24(tvb, offset+5);
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset + 5, 3,"Metric: %u",metric);
|
|
|
|
/* Destination Router ID */
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset + 8, 4, "Destination Router ID: %s",
|
|
ip_to_str(tvb_get_ptr(tvb, offset + 8, 4)));
|
|
|
|
offset+=12;
|
|
break;
|
|
|
|
|
|
case OSPF_V3_LSTYPE_TYPE_7:
|
|
case OSPF_V3_LSTYPE_AS_EXTERNAL:
|
|
|
|
/* flags */
|
|
dissect_ospf_bitfield(ospf_lsa_tree, tvb, offset, &bfinfo_v3_as_external_flags);
|
|
flags=tvb_get_guint8(tvb, offset);
|
|
|
|
/* 24 bits metric */
|
|
metric=tvb_get_ntoh24(tvb, offset+1);
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset+1, 3,
|
|
"Metric: %u", metric);
|
|
|
|
/* prefix length */
|
|
prefix_length=tvb_get_guint8(tvb, offset+4);
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset+4, 1, "PrefixLength: %u",prefix_length);
|
|
|
|
/* prefix options */
|
|
dissect_ospf_bitfield(ospf_lsa_tree, tvb, offset+5, &bfinfo_v3_prefix_options);
|
|
|
|
/* referenced LS type */
|
|
referenced_ls_type=tvb_get_ntohs(tvb, offset+6);
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset+6, 2,"Referenced LS type 0x%04x (%s)",
|
|
referenced_ls_type, val_to_str(referenced_ls_type, v3_ls_type_vals, "Unknown"));
|
|
|
|
offset+=8;
|
|
|
|
/* address_prefix */
|
|
dissect_ospf_v3_address_prefix(tvb, offset, prefix_length, ospf_lsa_tree);
|
|
|
|
offset+=(prefix_length+31)/32*4;
|
|
|
|
/* Forwarding Address (optional - only if F-flag is on) */
|
|
if ( (offset < end_offset) && (flags & OSPF_V3_AS_EXTERNAL_FLAG_F) ) {
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset, 16,"Forwarding Address: %s",
|
|
ip6_to_str((const struct e_in6_addr *)tvb_get_ptr(tvb, offset, 16)));
|
|
|
|
offset+=16;
|
|
}
|
|
|
|
/* External Route Tag (optional - only if T-flag is on) */
|
|
if ( (offset < end_offset) && (flags & OSPF_V3_AS_EXTERNAL_FLAG_T) ) {
|
|
external_route_tag=tvb_get_ntohl(tvb, offset);
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset, 4,"External Route Tag: %u",
|
|
external_route_tag);
|
|
|
|
offset+=4;
|
|
}
|
|
|
|
/* Referenced Link State ID (optional - only if Referenced LS type is non-zero */
|
|
if ( (offset < end_offset) && (referenced_ls_type != 0) ) {
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset, 4, "Referenced Link State ID: %s",
|
|
ip_to_str(tvb_get_ptr(tvb, offset, 4)));
|
|
offset+=4;
|
|
}
|
|
|
|
break;
|
|
|
|
case OSPF_V3_LSTYPE_LINK:
|
|
|
|
/* router priority */
|
|
router_priority=tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset, 1, "Router Priority: %u", router_priority);
|
|
|
|
/* options field in an link-lsa */
|
|
dissect_ospf_bitfield(ospf_lsa_tree, tvb, offset + 1, &bfinfo_v3_options);
|
|
|
|
/* Link-local Interface Address */
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset + 4, 16, "Link-local Interface Address: %s",
|
|
ip6_to_str((const struct e_in6_addr *)tvb_get_ptr(tvb, offset + 4, 16)));
|
|
|
|
/* Number prefixes */
|
|
number_prefixes=tvb_get_ntohl(tvb, offset + 20);
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset+20, 4, "# prefixes: %d",number_prefixes);
|
|
|
|
offset+=24;
|
|
|
|
while (number_prefixes > 0) {
|
|
|
|
/* prefix length */
|
|
prefix_length=tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset, 1, "PrefixLength: %u",prefix_length);
|
|
|
|
/* prefix options */
|
|
dissect_ospf_bitfield(ospf_lsa_tree, tvb, offset+1, &bfinfo_v3_prefix_options);
|
|
|
|
/* 16 bits reserved */
|
|
reserved16=tvb_get_ntohs(tvb, offset+2);
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset+2, 2,
|
|
(reserved16 == 0 ? "Reserved: %u" : "Reserved: %u [incorrect, should be 0]"),reserved16);
|
|
|
|
offset+=4;
|
|
|
|
/* address_prefix */
|
|
dissect_ospf_v3_address_prefix(tvb, offset, prefix_length, ospf_lsa_tree);
|
|
|
|
offset+=(prefix_length+31)/32*4;
|
|
|
|
number_prefixes--;
|
|
|
|
}
|
|
break;
|
|
|
|
case OSPF_V3_LSTYPE_INTRA_AREA_PREFIX:
|
|
|
|
/* # prefixes */
|
|
number_prefixes=tvb_get_ntohs(tvb, offset);
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset, 2,"# prefixes: %u",number_prefixes);
|
|
|
|
/* referenced LS type */
|
|
referenced_ls_type=tvb_get_ntohs(tvb, offset+2);
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset+2, 2,"Referenced LS type 0x%04x (%s)",
|
|
referenced_ls_type, val_to_str(referenced_ls_type, v3_ls_type_vals, "Unknown"));
|
|
|
|
/* Referenced Link State ID */
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset + 4, 4, "Referenced Link State ID: %s",
|
|
ip_to_str(tvb_get_ptr(tvb, offset + 4, 4)));
|
|
|
|
/* Referenced Advertising Router */
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset + 8, 4, "Referenced Advertising Router: %s",
|
|
ip_to_str(tvb_get_ptr(tvb, offset + 8, 4)));
|
|
|
|
offset+=12;
|
|
|
|
while (number_prefixes > 0) {
|
|
|
|
/* prefix length */
|
|
prefix_length=tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset, 1, "PrefixLength: %u",prefix_length);
|
|
|
|
/* prefix options */
|
|
dissect_ospf_bitfield(ospf_lsa_tree, tvb, offset+1, &bfinfo_v3_prefix_options);
|
|
|
|
/* 16 bits metric */
|
|
metric=tvb_get_ntohs(tvb, offset+2);
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset+2, 2,
|
|
"Metric: %u", metric);
|
|
|
|
offset+=4;
|
|
|
|
/* address_prefix */
|
|
dissect_ospf_v3_address_prefix(tvb, offset, prefix_length, ospf_lsa_tree);
|
|
|
|
offset+=(prefix_length+31)/32*4;
|
|
|
|
number_prefixes--;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
/* unknown LSA type */
|
|
proto_tree_add_text(ospf_lsa_tree, tvb, offset, ls_length,
|
|
"Unknown LSA Type 0x%04x",ls_type);
|
|
offset += ls_length;
|
|
break;
|
|
}
|
|
/* return the offset of the next LSA */
|
|
return offset;
|
|
}
|
|
|
|
static void dissect_ospf_v3_address_prefix(tvbuff_t *tvb, int offset, int prefix_length, proto_tree *tree)
|
|
{
|
|
|
|
int bytes_to_process;
|
|
struct e_in6_addr prefix;
|
|
|
|
bytes_to_process=((prefix_length+31)/32)*4;
|
|
|
|
if (prefix_length > 128) {
|
|
proto_tree_add_text(tree, tvb, offset, bytes_to_process,
|
|
"Address Prefix: length is invalid (%d, should be <= 128)",
|
|
prefix_length);
|
|
return;
|
|
}
|
|
|
|
memset(prefix.bytes, 0, sizeof prefix.bytes);
|
|
if (bytes_to_process != 0) {
|
|
tvb_memcpy(tvb, prefix.bytes, offset, bytes_to_process);
|
|
if (prefix_length % 8) {
|
|
prefix.bytes[bytes_to_process - 1] &=
|
|
((0xff00 >> (prefix_length % 8)) & 0xff);
|
|
}
|
|
}
|
|
proto_tree_add_text(tree, tvb, offset, bytes_to_process,
|
|
"Address Prefix: %s", ip6_to_str(&prefix));
|
|
|
|
}
|
|
|
|
|
|
void
|
|
proto_register_ospf(void)
|
|
{
|
|
static gint *ett[] = {
|
|
&ett_ospf,
|
|
&ett_ospf_hdr,
|
|
&ett_ospf_hello,
|
|
&ett_ospf_desc,
|
|
&ett_ospf_lsr,
|
|
&ett_ospf_lsa,
|
|
&ett_ospf_lsa_router_link,
|
|
&ett_ospf_lsa_upd,
|
|
&ett_ospf_lsa_mpls,
|
|
&ett_ospf_lsa_mpls_router,
|
|
&ett_ospf_lsa_mpls_link,
|
|
&ett_ospf_lsa_mpls_link_stlv,
|
|
&ett_ospf_lsa_mpls_link_stlv_admingrp,
|
|
&ett_ospf_lsa_oif_tna,
|
|
&ett_ospf_lsa_oif_tna_stlv,
|
|
&ett_ospf_v2_options,
|
|
&ett_ospf_v3_options,
|
|
&ett_ospf_dbd,
|
|
&ett_ospf_lls_data_block,
|
|
&ett_ospf_lls_tlv,
|
|
&ett_ospf_lls_ext_options,
|
|
&ett_ospf_v2_router_lsa_flags,
|
|
&ett_ospf_v3_router_lsa_flags,
|
|
&ett_ospf_v3_as_external_flags,
|
|
&ett_ospf_v3_prefix_options
|
|
};
|
|
|
|
proto_ospf = proto_register_protocol("Open Shortest Path First",
|
|
"OSPF", "ospf");
|
|
proto_register_field_array(proto_ospf, ospff_info, array_length(ospff_info));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
}
|
|
|
|
void
|
|
proto_reg_handoff_ospf(void)
|
|
{
|
|
dissector_handle_t ospf_handle;
|
|
|
|
ospf_handle = create_dissector_handle(dissect_ospf, proto_ospf);
|
|
dissector_add("ip.proto", IP_PROTO_OSPF, ospf_handle);
|
|
data_handle = find_dissector("data");
|
|
}
|