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/* packet-bgp.c
 * Routines for BGP packet dissection.
 * Copyright 1999, Jun-ichiro itojun Hagino <itojun@itojun.org>
 *
 * Wireshark - Network traffic analyzer
 * By Gerald Combs <gerald@wireshark.org>
 * Copyright 1998 Gerald Combs
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */
/* Supports:
 * RFC1771 A Border Gateway Protocol 4 (BGP-4)
 * RFC1965 Autonomous System Confederations for BGP
 * RFC1997 BGP Communities Attribute
 * RFC2547 BGP/MPLS VPNs
 * RFC2796 BGP Route Reflection An alternative to full mesh IBGP
 * RFC2842 Capabilities Advertisement with BGP-4
 * RFC2858 Multiprotocol Extensions for BGP-4
 * RFC2918 Route Refresh Capability for BGP-4
 * RFC3107 Carrying Label Information in BGP-4
 * RFC4486 Subcodes for BGP Cease Notification Message
 * RFC4724 Graceful Restart Mechanism for BGP
 * RFC5512 BGP Encapsulation SAFI and the BGP Tunnel Encapsulation Attribute
 * RFC5575 Dissemination of flow specification rules
 * RFC5640 Load-Balancing for Mesh Softwires
 * RFC6368 Internal BGP as the Provider/Customer Edge Protocol for
           BGP/MPLS IP Virtual Private Networks (VPNs)
 * RFC6608 Subcodes for BGP Finite State Machine Error
 * RFC6793 BGP Support for Four-Octet Autonomous System (AS) Number Space
 * RFC5512 The BGP Encapsulation Subsequent Address Family Identifier (SAFI)
 * draft-ietf-idr-dynamic-cap
 * draft-ietf-idr-bgp-enhanced-route-refresh-02
 * draft-ietf-idr-bgp-ext-communities-05
 * draft-knoll-idr-qos-attribute-03
 * draft-nalawade-kapoor-tunnel-safi-05
 * draft-ietf-idr-add-paths-04 Additional-Path for BGP-4
 * draft-ietf-l2vpn-evpn-05 BGP MPLS Based Ethernet VPN
 * draft-ietf-idr-aigp-18 for BGP
 * draft-gredler-idr-bgp-ls-segment-routing-ext-01
 * http://www.iana.org/assignments/bgp-parameters/ (last updated 2012-04-26)

 * TODO:
 * Destination Preference Attribute for BGP (work in progress)
 * RFC1863 A BGP/IDRP Route Server alternative to a full mesh routing
 */
/* (c) Copyright 2015, Pratik Yeole <pyeole@ncsu.edu>
   -  Fixed incorrect decoding of Network Layer Reachability Information (NLRI) in BGP UPDATE message with add-path support
 */

#include "config.h"

#include <epan/packet.h>
#include <epan/exceptions.h>
#include <epan/addr_and_mask.h>
#include <epan/show_exception.h>
#include <epan/afn.h>
#include <epan/prefs.h>
#include <epan/expert.h>
#include <epan/etypes.h>
#include <epan/to_str.h>
#include <epan/proto_data.h>
#include <wsutil/str_util.h>
#include "packet-ip.h"
#include "packet-ldp.h"
#include "packet-bgp.h"

void proto_register_bgp(void);
void proto_reg_handoff_bgp(void);

static dissector_handle_t bgp_handle;

/* #define MAX_STR_LEN 256 */

/* some handy things to know */
#define BGP_MAX_PACKET_SIZE            4096
#define BGP_MARKER_SIZE                  16    /* size of BGP marker */
#define BGP_HEADER_SIZE                  19    /* size of BGP header, including marker */
#define BGP_MIN_OPEN_MSG_SIZE            29
#define BGP_MIN_UPDATE_MSG_SIZE          23
#define BGP_MIN_NOTIFICATION_MSG_SIZE    21
#define BGP_MIN_KEEPALVE_MSG_SIZE       BGP_HEADER_SIZE
#define BGP_TCP_PORT                    179
#define BGP_ROUTE_DISTINGUISHER_SIZE      8

/* BGP message types */
#define BGP_OPEN          1
#define BGP_UPDATE        2
#define BGP_NOTIFICATION  3
#define BGP_KEEPALIVE     4
#define BGP_ROUTE_REFRESH 5
#define BGP_CAPABILITY    6
#define BGP_ROUTE_REFRESH_CISCO 0x80

#define BGP_SIZE_OF_PATH_ATTRIBUTE       2


/* attribute flags, from RFC1771 */
#define BGP_ATTR_FLAG_OPTIONAL        0x80
#define BGP_ATTR_FLAG_TRANSITIVE      0x40
#define BGP_ATTR_FLAG_PARTIAL         0x20
#define BGP_ATTR_FLAG_EXTENDED_LENGTH 0x10


/* SSA flags */
#define BGP_SSA_TRANSITIVE    0x8000
#define BGP_SSA_TYPE          0x7FFF

/* SSA Types */
#define BGP_SSA_L2TPv3          1
#define BGP_SSA_mGRE            2
#define BGP_SSA_IPSec           3
#define BGP_SSA_MPLS            4
#define BGP_SSA_L2TPv3_IN_IPSec 5
#define BGP_SSA_mGRE_IN_IPSec   6

/* BGP MPLS information */
#define BGP_MPLS_BOTTOM_L_STACK 0x000001

/* AS_PATH segment types */
#define AS_SET             1   /* RFC1771 */
#define AS_SEQUENCE        2   /* RFC1771 */
#define AS_CONFED_SET      4   /* RFC1965 has the wrong values, corrected in  */
#define AS_CONFED_SEQUENCE 3   /* draft-ietf-idr-bgp-confed-rfc1965bis-01.txt */

/* OPEN message Optional Parameter types  */
#define BGP_OPTION_AUTHENTICATION    1   /* RFC1771 */
#define BGP_OPTION_CAPABILITY        2   /* RFC2842 */

/* https://www.iana.org/assignments/capability-codes/ (last updated 2015-09-30) */
/* BGP capability code */
#define BGP_CAPABILITY_RESERVED                     0   /* RFC2434 */
#define BGP_CAPABILITY_MULTIPROTOCOL                1   /* RFC2858 */
#define BGP_CAPABILITY_ROUTE_REFRESH                2   /* RFC2918 */
#define BGP_CAPABILITY_COOPERATIVE_ROUTE_FILTERING  3   /* RFC5291 */
#define BGP_CAPABILITY_MULTIPLE_ROUTE_DEST          4   /* RFC3107 */
#define BGP_CAPABILITY_EXTENDED_NEXT_HOP            5   /* RFC5549 */
#define BGP_CAPABILITY_EXTENDED_MESSAGE             6   /* draft-ietf-idr-bgp-extended-messages */
#define BGP_CAPABILITY_GRACEFUL_RESTART             64  /* RFC4724 */
#define BGP_CAPABILITY_4_OCTET_AS_NUMBER            65  /* RFC6793 */
#define BGP_CAPABILITY_DYNAMIC_CAPABILITY           67  /* draft-ietf-idr-dynamic-cap */
#define BGP_CAPABILITY_MULTISESSION                 68  /* draft-ietf-idr-bgp-multisession */
#define BGP_CAPABILITY_ADDITIONAL_PATHS             69  /* draft-ietf-idr-add-paths */
#define BGP_CAPABILITY_ENHANCED_ROUTE_REFRESH       70  /* [RFC7313] */
#define BGP_CAPABILITY_LONG_LIVED_GRACEFUL_RESTART  71  /* draft-uttaro-idr-bgp-persistence */
#define BGP_CAPABILITY_CP_ORF                       72  /* [RFC7543] */
#define BGP_CAPABILITY_FQDN                         73  /* draft-walton-bgp-hostname-capability */
#define BGP_CAPABILITY_ROUTE_REFRESH_CISCO         128  /* Cisco */
#define BGP_CAPABILITY_ORF_CISCO                   130  /* Cisco */

#define BGP_ORF_PREFIX_CISCO    0x80 /* Cisco */
#define BGP_ORF_COMM_CISCO      0x81 /* Cisco */
#define BGP_ORF_EXTCOMM_CISCO   0x82 /* Cisco */
#define BGP_ORF_ASPATH_CISCO    0x83 /* Cisco */

#define BGP_ORF_COMM        0x02 /* RFC5291 */
#define BGP_ORF_EXTCOMM     0x03 /* RFC5291 */
#define BGP_ORF_ASPATH      0x04 /* draft-ietf-idr-aspath-orf-02.txt */
/* RFC5291 */
#define BGP_ORF_ACTION      0xc0
#define BGP_ORF_ADD         0x00
#define BGP_ORF_REMOVE      0x01
#define BGP_ORF_REMOVEALL   0x02

#define BGP_ORF_MATCH       0x20
#define BGP_ORF_PERMIT      0x00
#define BGP_ORF_DENY        0x01

/* well-known communities, from RFC1997 */
#define BGP_COMM_NO_EXPORT           0xFFFFFF01
#define BGP_COMM_NO_ADVERTISE        0xFFFFFF02
#define BGP_COMM_NO_EXPORT_SUBCONFED 0xFFFFFF03
#define FOURHEX0                     0x00000000
#define FOURHEXF                     0xFFFF0000

/* attribute types */
#define BGPTYPE_ORIGIN               1 /* RFC1771           */
#define BGPTYPE_AS_PATH              2 /* RFC1771           */
#define BGPTYPE_NEXT_HOP             3 /* RFC1771           */
#define BGPTYPE_MULTI_EXIT_DISC      4 /* RFC1771           */
#define BGPTYPE_LOCAL_PREF           5 /* RFC1771           */
#define BGPTYPE_ATOMIC_AGGREGATE     6 /* RFC1771           */
#define BGPTYPE_AGGREGATOR           7 /* RFC1771           */
#define BGPTYPE_COMMUNITIES          8 /* RFC1997           */
#define BGPTYPE_ORIGINATOR_ID        9 /* RFC2796           */
#define BGPTYPE_CLUSTER_LIST        10 /* RFC2796           */
#define BGPTYPE_DPA                 11 /* work in progress  */
#define BGPTYPE_ADVERTISER          12 /* RFC1863           */
#define BGPTYPE_RCID_PATH           13 /* RFC1863           */
#define BGPTYPE_MP_REACH_NLRI       14 /* RFC2858           */
#define BGPTYPE_MP_UNREACH_NLRI     15 /* RFC2858           */
#define BGPTYPE_EXTENDED_COMMUNITY  16 /* Draft Ramachandra */
#define BGPTYPE_AS4_PATH            17 /* RFC 6793          */
#define BGPTYPE_AS4_AGGREGATOR      18 /* RFC 6793          */
#define BGPTYPE_SAFI_SPECIFIC_ATTR  19 /* draft-kapoor-nalawade-idr-bgp-ssa-00.txt */
#define BGPTYPE_PMSI_TUNNEL_ATTR    22 /* RFC6514 */
#define BGPTYPE_TUNNEL_ENCAPS_ATTR  23 /* RFC5512 */
#define BGPTYPE_AIGP                26 /* draft-ietf-idr-aigp-18 */
#define BGPTYPE_LINK_STATE_ATTR     29 /* draft-ietf-idr-ls-distribution */
#define BGPTYPE_LINK_STATE_OLD_ATTR 99 /* squatted value used by at least 2
                                          implementations before IANA assignment */
#define BGPTYPE_ATTR_SET           128 /* RFC6368           */

/*EVPN Route Types */
#define EVPN_AD_ROUTE           1
#define EVPN_MAC_ROUTE          2
#define EVPN_INC_MCAST_TREE     3
#define EVPN_ETH_SEGMENT_ROUTE  4
#define EVPN_IP_PREFIX_ROUTE    5 /* draft-rabadan-l2vpn-evpn-prefix-advertisement */

/* NLRI type as define in BGP flow spec RFC */
#define BGPNLRI_FSPEC_DST_PFIX      1 /* RFC 5575         */
#define BGPNLRI_FSPEC_SRC_PFIX      2 /* RFC 5575         */
#define BGPNLRI_FSPEC_IP_PROTO      3 /* RFC 5575         */
#define BGPNLRI_FSPEC_PORT          4 /* RFC 5575         */
#define BGPNLRI_FSPEC_DST_PORT      5 /* RFC 5575         */
#define BGPNLRI_FSPEC_SRC_PORT      6 /* RFC 5575         */
#define BGPNLRI_FSPEC_ICMP_TP       7 /* RFC 5575         */
#define BGPNLRI_FSPEC_ICMP_CD       8 /* RFC 5575         */
#define BGPNLRI_FSPEC_TCP_FLAGS     9 /* RFC 5575         */
#define BGPNLRI_FSPEC_PCK_LEN      10 /* RFC 5575         */
#define BGPNLRI_FSPEC_DSCP         11 /* RFC 5575         */
#define BGPNLRI_FSPEC_FRAGMENT     12 /* RFC 5575         */

/* BGP flow spec NLRI operator bitmask */
#define BGPNLRI_FSPEC_END_OF_LST         0x80
#define BGPNLRI_FSPEC_AND_BIT            0x40
#define BGPNLRI_FSPEC_VAL_LEN            0x30
#define BGPNLRI_FSPEC_UNUSED_BIT4        0x08
#define BGPNLRI_FSPEC_UNUSED_BIT5        0x04
#define BGPNLRI_FSPEC_LESS_THAN          0x04
#define BGPNLRI_FSPEC_GREATER_THAN       0x02
#define BGPNLRI_FSPEC_EQUAL              0x01
#define BGPNLRI_FSPEC_TCPF_NOTBIT        0x02
#define BGPNLRI_FSPEC_TCPF_MATCHBIT      0x01
#define BGPNLRI_FSPEC_DSCP_BITMASK       0x3F

/* BGP flow spec specific filter value: TCP flags, Packet fragment ... */
#define BGPNLRI_FSPEC_TH_FIN  0x01
#define BGPNLRI_FSPEC_TH_SYN  0x02
#define BGPNLRI_FSPEC_TH_RST  0x04
#define BGPNLRI_FSPEC_TH_PUSH 0x08
#define BGPNLRI_FSPEC_TH_ACK  0x10
#define BGPNLRI_FSPEC_TH_URG  0x20
#define BGPNLRI_FSPEC_TH_ECN  0x40
#define BGPNLRI_FSPEC_TH_CWR  0x80

#define BGPNLRI_FSPEC_FG_DF   0x01
#define BGPNLRI_FSPEC_FG_ISF  0x02
#define BGPNLRI_FSPEC_FG_FF   0x04
#define BGPNLRI_FSPEC_FG_LF   0x08

/* Extended community type */
/* according to IANA's number assignment at: http://www.iana.org/assignments/bgp-extended-communities */
/* BGP trasnsitive extended community type high octet */
/* Range 0x00-0x3f First Come First Served */
/* Range 0x80-0x8f Reserved for Experimental */
/* Range 0x90-0xbf  Standards Action */

#define BGP_EXT_COM_TYPE_HIGH_TR_AS2        0x00    /* Transitive Two-Octet AS-Specific Extended Community */
#define BGP_EXT_COM_TYPE_HIGH_TR_IP4        0x01    /* Transitive IPv4-Address-specific Extended Community */
#define BGP_EXT_COM_TYPE_HIGH_TR_AS4        0x02    /* Transitive Four-Octet AS-Specific Extended Community */
#define BGP_EXT_COM_TYPE_HIGH_TR_OPAQUE     0x03    /* Transitive Opaque Extended Community */
#define BGP_EXT_COM_TYPE_HIGH_TR_QOS        0x04    /* QoS Marking [Thomas_Martin_Knoll] */
#define BGP_EXT_COM_TYPE_HIGH_TR_COS        0x05    /* CoS Capability [Thomas_Martin_Knoll] */
#define BGP_EXT_COM_TYPE_HIGH_TR_EVPN       0x06    /* EVPN (Sub-Types are defined in the "EVPN Extended Community Sub-Types" registry) */
/* 0x07 Unassigned */
#define BGP_EXT_COM_TYPE_HIGH_TR_FLOW       0x08    /* Flow spec redirect/mirror to IP next-hop [draft-simpson-idr-flowspec-redirect] */
#define BGP_EXT_COM_TYPE_HIGH_TR_EXP        0x80    /* Generic Transitive Experimental Extended Community */
#define BGP_EXT_COM_TYPE_HIGH_TR_EXP_FSIP4  0x81    /* http://tools.ietf.org/html/draft-haas-idr-flowspec-redirect-rt-bis-00 */
#define BGP_EXT_COM_TYPE_HIGH_TR_EXP_FSAS4  0x82    /* http://tools.ietf.org/html/draft-haas-idr-flowspec-redirect-rt-bis-00 */

/* BGP non transitive extended community type high octet */
/* 0x40-0x7f First Come First Served */
/* 0xc0-0xcf Reserved for Experimental Use (see [RFC4360]) */
/* 0xd0-0xff Standards Action */
/* 0x45-0x7f Unassigned */
#define BGP_EXT_COM_TYPE_HIGH_NTR_AS2       0x40    /* Non-Transitive Two-Octet AS-Specific Extended Community */
#define BGP_EXT_COM_TYPE_HIGH_NTR_IP4       0x41    /* Non-Transitive IPv4-Address-specific Extended Community */
#define BGP_EXT_COM_TYPE_HIGH_NTR_AS4       0x42    /* Non-Transitive Four-Octet AS-Specific Extended Community */
#define BGP_EXT_COM_TYPE_HIGH_NTR_OPAQUE    0x43    /* Non-Transitive Opaque Extended Community */
#define BGP_EXT_COM_TYPE_HIGH_NTR_QOS       0x44    /* QoS Marking [Thomas_Martin_Knoll] */


/* EVPN Extended Community Sub-Types */
#define BGP_EXT_COM_STYPE_EPVN_MMAC         0x00    /* MAC Mobility [draft-ietf-l2vpn-pbb-evpn] */
#define BGP_EXT_COM_STYPE_EVPN_LABEL        0x01    /* ESI MPLS Label [draft-ietf-l2vpn-evpn] */
#define BGP_EXT_COM_STYPE_EVPN_IMP          0x02    /* ES Import [draft-sajassi-l2vpn-evpn-segment-route] */

/* RFC 7432 Flag single active mode */
#define BGP_EXT_COM_ESI_LABEL_FLAGS         0x01    /* bitmask: set for single active multi-homing site */

/* EPVN route AD NLRI ESI type */
#define BGP_NLRI_EVPN_ESI_VALUE             0x00    /* ESI type 0, 9 bytes interger */
#define BGP_NLRI_EVPN_ESI_LACP              0x01    /* ESI type 1, LACP 802.1AX */
#define BGP_NLRI_EVPN_ESI_MSTP              0x02    /* ESI type 2, MSTP defined ESI */
#define BGP_NLRI_EVPN_ESI_MAC               0x03    /* ESI type 3, MAC allocated value */
#define BGP_NLRI_EVPN_ESI_RID               0x04    /* ESI type 4, Router ID as ESI */
#define BGP_NLRI_EVPN_ESI_ASN               0x05    /* ESI type 5, ASN as ESI */
#define BGP_NLRI_EVPN_ESI_RES               0xFF    /* ESI 0xFF reserved */


/* Transitive Two-Octet AS-Specific Extended Community Sub-Types */
/* 0x04 Unassigned */
/* 0x06-0x07 Unassigned */
/* 0x0b-0x0f Unassigned */
/* 0x11-0xff Unassigned */
#define BGP_EXT_COM_STYPE_AS2_RT        0x02    /* Route Target [RFC4360] */
#define BGP_EXT_COM_STYPE_AS2_RO        0x03    /* Route Origin [RFC4360] */
#define BGP_EXT_COM_STYPE_AS2_OSPF      0x05    /* OSPF Domain Identifier [RFC4577] */
#define BGP_EXT_COM_STYPE_AS2_DCOLL     0x08    /* BGP Data Collection [RFC4384] */
#define BGP_EXT_COM_STYPE_AS2_SRC_AS    0x09    /* Source AS [RFC6514] */
#define BGP_EXT_COM_STYPE_AS2_L2VPN     0x0a    /* L2VPN Identifier [RFC6074] */
#define BGP_EXT_COM_STYPE_AS2_CVPND     0x0010  /* Cisco VPN-Distinguisher [Eric_Rosen] */

/* Non-Transitive Two-Octet AS-Specific Extended Community Sub-Types */
/* 0x00-0xbf First Come First Served */
/* 0xc0-0xff IETF Review*/

#define BGP_EXT_COM_STYPE_AS2_LBW       0x04    /* Link Bandwidth Extended Community [draft-ietf-idr-link-bandwidth-00] */
#define BGP_EXT_COM_STYPE_AS2_VNI       0x80    /* Virtual-Network Identifier Extended Community [draft-drao-bgp-l3vpn-virtual-network-overlays] */

/* Transitive Four-Octet AS-Specific Extended Community Sub-Types */
/* 0x00-0xbf First Come First Served */
/* 0xc0-0xff IETF Review */

#define BGP_EXT_COM_STYPE_AS4_RT        0x02    /* Route Target [RFC5668] */
#define BGP_EXT_COM_STYPE_AS4_RO        0x03    /* Route Origin [RFC5668] */
#define BGP_EXT_COM_STYPE_AS4_GEN       0x04    /* Generic [draft-ietf-idr-as4octet-extcomm-generic-subtype] */
#define BGP_EXT_COM_STYPE_AS4_OSPF      0x05    /* OSPF Domain Identifier [RFC4577] */
#define BGP_EXT_COM_STYPE_AS4_S_AS      0x09    /* Source AS [RFC6514] */
#define BGP_EXT_COM_STYPE_AS4_CIS_V     0x10    /* Cisco VPN Identifier [Eric_Rosen] */

/* Non-Transitive Four-Octet AS-Specific Extended Community Sub-Types */

#define BGP_EXT_COM_STYPE_AS4_GEN       0x04    /* Generic [draft-ietf-idr-as4octet-extcomm-generic-subtype] */

/* Transitive IPv4-Address-Specific Extended Community Sub-Types */

#define BGP_EXT_COM_STYPE_IP4_RT        0x02    /* Route Target [RFC4360] */
#define BGP_EXT_COM_STYPE_IP4_RO        0x03    /* Route Origin [RFC4360] */
#define BGP_EXT_COM_STYPE_IP4_OSPF_D    0x05    /* OSPF Domain Identifier [RFC4577] */
#define BGP_EXT_COM_STYPE_IP4_OSPF_R    0x07    /* OSPF Route ID [RFC4577] */
#define BGP_EXT_COM_STYPE_IP4_L2VPN     0x0a    /* L2VPN Identifier [RFC6074] */
#define BGP_EXT_COM_STYPE_IP4_VRF_I     0x0b    /* VRF Route Import [RFC6514] */
#define BGP_EXT_COM_STYPE_IP4_CIS_D     0x10    /* Cisco VPN-Distinguisher [Eric_Rosen] */
#define BGP_EXT_COM_STYPE_IP4_SEG_NH    0x12    /* Inter-area P2MP Segmented Next-Hop [draft-ietf-mpls-seamless-mcast] */

/* Transitive Opaque Extended Community Sub-Types */

#define BGP_EXT_COM_STYPE_OPA_OSPF      0x06    /* OSPF Route Type [RFC4577] */
#define BGP_EXT_COM_STYPE_OPA_COLOR     0x0b    /* Color Extended Community [RFC5512] */
#define BGP_EXT_COM_STYPE_OPA_ENCAP     0x0c    /* Encapsulation Extended Community [RFC5512] */
#define BGP_EXT_COM_STYPE_OPA_DGTW      0x0d    /* Default Gateway  [Yakov_Rekhter] */

/* BGP Tunnel Encapsulation Attribute Tunnel Types */

#define BGP_EXT_COM_TUNNEL_RESERVED     0       /* Reserved [RFC5512] */
#define BGP_EXT_COM_TUNNEL_L2TPV3       1       /* L2TPv3 over IP [RFC5512] */
#define BGP_EXT_COM_TUNNEL_GRE          2       /* GRE [RFC5512] */
#define BGP_EXT_COM_TUNNEL_ENDP         3       /* Transmit tunnel endpoint [RFC5566] */
#define BGP_EXT_COM_TUNNEL_IPSEC        4       /* IPsec in Tunnel-mode [RFC5566] */
#define BGP_EXT_COM_TUNNEL_IPIPSEC      5       /* IP in IP tunnel with IPsec Transport Mode [RFC5566] */
#define BGP_EXT_COM_TUNNEL_MPLSIP       6       /* MPLS-in-IP tunnel with IPsec Transport Mode [RFC5566] */
#define BGP_EXT_COM_TUNNEL_IPIP         7       /* IP in IP [RFC5512] */
#define BGP_EXT_COM_TUNNEL_VXLAN        8       /* VXLAN Encapsulation [draft-sd-l2vpn-evpn-overlay] */
#define BGP_EXT_COM_TUNNEL_NVGRE        9       /* NVGRE Encapsulation [draft-sd-l2vpn-evpn-overlay] */
#define BGP_EXT_COM_TUNNEL_MPLS         10      /* MPLS Encapsulation [draft-sd-l2vpn-evpn-overlay] */
#define BGP_EXT_COM_TUNNEL_MPLSGRE      11      /* MPLS in GRE Encapsulation [draft-sd-l2vpn-evpn-overlay] */
#define BGP_EXT_COM_TUNNEL_VXLANGPE     12      /* VxLAN GPE Encapsulation [draft-sd-l2vpn-evpn-overlay] */
#define BGP_EXT_COM_TUNNEL_MPLSUDP      13      /* MPLS in UDP Encapsulation [draft-ietf-l3vpn-end-system] */

/* Non-Transitive Opaque Extended Community Sub-Types */

#define BGP_EXT_COM_STYPE_OPA_OR_VAL_ST 0x00    /* BGP Origin Validation State [draft-ietf-sidr-origin-validation-signaling] */

/* BGP Generic Transitive Experimental Use Extended Community Sub-Types */

#define BGP_EXT_COM_STYPE_EXP_F_TR      0x06    /* Flow spec traffic-rate [RFC5575] */
#define BGP_EXT_COM_STYPE_EXP_F_TA      0x07    /* Flow spec traffic-action [RFC5575] */
#define BGP_EXT_COM_STYPE_EXP_F_RED     0x08    /* Flow spec redirect [RFC5575] */
#define BGP_EXT_COM_STYPE_EXP_F_RMARK   0x09    /* Flow spec traffic-remarking [RFC5575] */
#define BGP_EXT_COM_STYPE_EXP_L2        0x0a    /* Layer2 Info Extended Community [RFC4761] */

/* BGP Generic Transitive Experimental redirect RT format IPv4:2 bytes Use Extended Community Sub-Types */

#define BGP_EXT_COM_STYPE_EXP_F_RED_IP4 0x08

/* BGP Generic Transitive Experimental redirect RT format AS4:2 bytes Use Extended Community Sub-Types */

#define BGP_EXT_COM_STYPE_EXP_F_RED_AS4 0x08

/* according to IANA's number assignment at: http://www.iana.org/assignments/bgp-extended-communities */

                                        /* draft-ietf-idr-bgp-ext-communities */
#define BGP_EXT_COM_RT_AS2        0x0002  /* Route Target,Format AS(2bytes):AN(4bytes) */
#define BGP_EXT_COM_RT_IP4        0x0102  /* Route Target,Format IP address:AN(2bytes) */
#define BGP_EXT_COM_RT_AS4        0x0202  /* Route Target,Format AS(4bytes):AN(2bytes) */

/* extended community option flow flec action bit S and T */
#define BGP_EXT_COM_FSPEC_ACT_S 0x02
#define BGP_EXT_COM_FSPEC_ACT_T 0x01

/* extended community l2vpn flags */

#define BGP_EXT_COM_L2_FLAG_D     0x80
#define BGP_EXT_COM_L2_FLAG_Z1    0x40
#define BGP_EXT_COM_L2_FLAG_F     0x20
#define BGP_EXT_COM_L2_FLAG_Z345  0x1c
#define BGP_EXT_COM_L2_FLAG_C     0x02
#define BGP_EXT_COM_L2_FLAG_S     0x01

/* Extended community QoS Marking technology type */
#define QOS_TECH_TYPE_DSCP         0x00  /* DiffServ enabled IP (DSCP encoding) */
#define QOS_TECH_TYPE_802_1q       0x01  /* Ethernet using 802.1q priority tag */
#define QOS_TECH_TYPE_E_LSP        0x02  /* MPLS using E-LSP */
#define QOS_TECH_TYPE_VC           0x03  /* Virtual Channel (VC) encoding using separate channels for */
                                         /* QoS forwarding / one channel per class (e.g. ATM VCs, FR  */
                                         /* VCs, MPLS L-LSPs) */
#define QOS_TECH_TYPE_GMPLS_TIME   0x04   /* GMPLS - time slot encoding */
#define QOS_TECH_TYPE_GMPLS_LAMBDA 0x05  /* GMPLS - lambda encoding */
#define QOS_TECH_TYPE_GMPLS_FIBRE  0x06  /* GMPLS - fibre encoding */

/* OSPF codes for  BGP_EXT_COM_OSPF_RTYPE draft-rosen-vpns-ospf-bgp-mpls  */
#define BGP_OSPF_RTYPE_RTR      1 /* OSPF Router LSA */
#define BGP_OSPF_RTYPE_NET      2 /* OSPF Network LSA */
#define BGP_OSPF_RTYPE_SUM      3 /* OSPF Summary LSA */
#define BGP_OSPF_RTYPE_EXT      5 /* OSPF External LSA, note that ASBR doesn't apply to MPLS-VPN */
#define BGP_OSPF_RTYPE_NSSA     7 /* OSPF NSSA External*/
#define BGP_OSPF_RTYPE_SHAM     129 /* OSPF-MPLS-VPN Sham link */
#define BGP_OSPF_RTYPE_METRIC_TYPE 0x1 /* LSB of RTYPE Options Field */

/* Extended community & Route dinstinguisher formats */
#define FORMAT_AS2_LOC      0x00    /* Format AS(2bytes):AN(4bytes) */
#define FORMAT_IP_LOC       0x01    /* Format IP address:AN(2bytes) */
#define FORMAT_AS4_LOC      0x02    /* Format AS(4bytes):AN(2bytes) */

/* RFC 2858 subsequent address family numbers */
#define SAFNUM_UNICAST          1
#define SAFNUM_MULCAST          2
#define SAFNUM_UNIMULC          3
#define SAFNUM_MPLS_LABEL       4  /* rfc3107 */
#define SAFNUM_MCAST_VPN        5  /* draft-ietf-l3vpn-2547bis-mcast-bgp-08.txt */
#define SAFNUM_ENCAPSULATION    7  /* rfc5512 */
#define SAFNUM_TUNNEL          64  /* draft-nalawade-kapoor-tunnel-safi-02.txt */
#define SAFNUM_VPLS            65
#define SAFNUM_MDT             66  /* rfc6037 */
#define SAFNUM_EVPN            70  /* EVPN RFC */
#define SAFNUM_LINK_STATE      71  /* draft-ietf-idr-ls-distribution */
#define SAFNUM_LAB_VPNUNICAST 128  /* Draft-rosen-rfc2547bis-03 */
#define SAFNUM_LAB_VPNMULCAST 129
#define SAFNUM_LAB_VPNUNIMULC 130
#define SAFNUM_ROUTE_TARGET   132  /* RFC 4684 Constrained Route Distribution for BGP/MPLS IP VPN */
#define SAFNUM_FSPEC_RULE     133  /* RFC 5575 BGP flow spec SAFI */
#define SAFNUM_FSPEC_VPN_RULE 134  /* RFC 5575 BGP flow spec SAFI VPN */


/* BGP Additional Paths Capability */
#define BGP_ADDPATH_RECEIVE  0x01
#define BGP_ADDPATH_SEND     0x02

/* mcast-vpn route types draft-ietf-l3vpn-2547bis-mcast-bgp-08.txt */
#define MCAST_VPN_RTYPE_INTRA_AS_IPMSI_AD 1
#define MCAST_VPN_RTYPE_INTER_AS_IPMSI_AD 2
#define MCAST_VPN_RTYPE_SPMSI_AD          3
#define MCAST_VPN_RTYPE_LEAF_AD           4
#define MCAST_VPN_RTYPE_SOURCE_ACTIVE_AD  5
#define MCAST_VPN_RTYPE_SHARED_TREE_JOIN  6
#define MCAST_VPN_RTYPE_SOURCE_TREE_JOIN  7

/* RFC 5512 Tunnel Types */
#define TUNNEL_TYPE_L2TP_OVER_IP 1
#define TUNNEL_TYPE_GRE          2
#define TUNNEL_TYPE_IP_IN_IP     7

/*RFC 6514 PMSI Tunnel Types */
#define PMSI_TUNNEL_NOPRESENT    0
#define PMSI_TUNNEL_RSVPTE_P2MP  1
#define PMSI_TUNNEL_MLDP_P2MP    2
#define PMSI_TUNNEL_PIMSSM       3
#define PMSI_TUNNEL_PIMSM        4
#define PMSI_TUNNEL_BIDIR_PIM    5
#define PMSI_TUNNEL_INGRESS      6
#define PMSI_TUNNEL_MLDP_MP2MP   7

#define PMSI_MLDP_FEC_TYPE_RSVD         0
#define PMSI_MLDP_FEC_TYPE_GEN_LSP      1
#define PMSI_MLDP_FEC_TYPE_EXT_TYPE     255
#define PMSI_MLDP_FEC_ETYPE_RSVD        0

/* draft-ietf-idr-aigp-18 AIGP types */
#define AIGP_TLV_TYPE           1

/* RFC 5512/5640 Sub-TLV Types */
#define TUNNEL_SUBTLV_ENCAPSULATION 1
#define TUNNEL_SUBTLV_PROTO_TYPE    2
#define TUNNEL_SUBTLV_COLOR         4
#define TUNNEL_SUBTLV_LOAD_BALANCE  5

/* Link-State NLRI types */
#define LINK_STATE_NODE_NLRI                    1
#define LINK_STATE_LINK_NLRI                    2
#define LINK_STATE_IPV4_TOPOLOGY_PREFIX_NLRI    3
#define LINK_STATE_IPV6_TOPOLOGY_PREFIX_NLRI    4

/* Link-State NLRI Protocol-ID values */
#define BGP_LS_NLRI_PROTO_ID_UNKNOWN       0
#define BGP_LS_NLRI_PROTO_ID_IS_IS_LEVEL_1 1
#define BGP_LS_NLRI_PROTO_ID_IS_IS_LEVEL_2 2
#define BGP_LS_NLRI_PROTO_ID_OSPF          3
#define BGP_LS_NLRI_PROTO_ID_DIRECT        4
#define BGP_LS_NLRI_PROTO_ID_STATIC        5

/* Link-State routing universes */
#define BGP_LS_NLRI_ROUTING_UNIVERSE_LEVEL_3     0
#define BGP_LS_NLRI_ROUTING_UNIVERSE_LEVEL_1     1

#define BGP_LS_PREFIX_OSPF_ROUTE_TYPE_UNKNOWN    0
#define BGP_LS_PREFIX_OSPF_ROUTE_TYPE_INTRA_AREA 1
#define BGP_LS_PREFIX_OSPF_ROUTE_TYPE_INTER_AREA 2
#define BGP_LS_PREFIX_OSPF_ROUTE_TYPE_EXTERNAL_1 3
#define BGP_LS_PREFIX_OSPF_ROUTE_TYPE_EXTERNAL_2 4
#define BGP_LS_PREFIX_OSPF_ROUTE_TYPE_NSSA_1     5
#define BGP_LS_PREFIX_OSPF_ROUTE_TYPE_NSSA_2     6

/* draft-ietf-idr-ls-distribution-03 */
#define BGP_NLRI_TLV_LOCAL_NODE_DESCRIPTORS         256
#define BGP_NLRI_TLV_REMOTE_NODE_DESCRIPTORS        257
#define BGP_NLRI_TLV_LINK_LOCAL_REMOTE_IDENTIFIERS  258
#define BGP_NLRI_TLV_IPV4_INTERFACE_ADDRESS         259
#define BGP_NLRI_TLV_IPV4_NEIGHBOR_ADDRESS          260
#define BGP_NLRI_TLV_IPV6_INTERFACE_ADDRESS         261
#define BGP_NLRI_TLV_IPV6_NEIGHBOR_ADDRESS          262
#define BGP_NLRI_TLV_MULTI_TOPOLOGY_ID              263
#define BGP_NLRI_TLV_OSPF_ROUTE_TYPE                264
#define BGP_NLRI_TLV_IP_REACHABILITY_INFORMATION    265

#define BGP_NLRI_TLV_AUTONOMOUS_SYSTEM              512
#define BGP_NLRI_TLV_BGP_LS_IDENTIFIER              513
#define BGP_NLRI_TLV_AREA_ID                        514
#define BGP_NLRI_TLV_IGP_ROUTER_ID                  515

#define BGP_NLRI_TLV_NODE_FLAG_BITS                 1024
#define BGP_NLRI_TLV_OPAQUE_NODE_PROPERTIES         1025
#define BGP_NLRI_TLV_NODE_NAME                      1026
#define BGP_NLRI_TLV_IS_IS_AREA_IDENTIFIER          1027
#define BGP_NLRI_TLV_IPV4_ROUTER_ID_OF_LOCAL_NODE   1028
#define BGP_NLRI_TLV_IPV6_ROUTER_ID_OF_LOCAL_NODE   1029
#define BGP_NLRI_TLV_IPV4_ROUTER_ID_OF_REMOTE_NODE  1030
#define BGP_NLRI_TLV_IPV6_ROUTER_ID_OF_REMOTE_NODE  1031

#define BGP_NLRI_TLV_ADMINISTRATIVE_GROUP_COLOR     1088
#define BGP_NLRI_TLV_MAX_LINK_BANDWIDTH             1089
#define BGP_NLRI_TLV_MAX_RESERVABLE_LINK_BANDWIDTH  1090
#define BGP_NLRI_TLV_UNRESERVED_BANDWIDTH           1091
#define BGP_NLRI_TLV_TE_DEFAULT_METRIC              1092
#define BGP_NLRI_TLV_LINK_PROTECTION_TYPE           1093
#define BGP_NLRI_TLV_MPLS_PROTOCOL_MASK             1094
#define BGP_NLRI_TLV_METRIC                         1095
#define BGP_NLRI_TLV_SHARED_RISK_LINK_GROUP         1096
#define BGP_NLRI_TLV_OPAQUE_LINK_ATTRIBUTE          1097
#define BGP_NLRI_TLV_LINK_NAME_ATTRIBUTE            1098

#define BGP_NLRI_TLV_IGP_FLAGS                      1152
#define BGP_NLRI_TLV_ROUTE_TAG                      1153
#define BGP_NLRI_TLV_EXTENDED_TAG                   1154
#define BGP_NLRI_TLV_PREFIX_METRIC                  1155
#define BGP_NLRI_TLV_OSPF_FORWARDING_ADDRESS        1156
#define BGP_NLRI_TLV_OPAQUE_PREFIX_ATTRIBUTE        1157


/* Link-State NLRI TLV lengths */
#define BGP_NLRI_TLV_LEN_AUTONOMOUS_SYSTEM              4
#define BGP_NLRI_TLV_LEN_BGP_LS_IDENTIFIER              4
#define BGP_NLRI_TLV_LEN_AREA_ID                        4
#define BGP_NLRI_TLV_LEN_IPV4_ROUTER_ID                 4
#define BGP_NLRI_TLV_LEN_IPV6_ROUTER_ID                 16
#define BGP_NLRI_TLV_LEN_IPV4_ROUTER_ID_OF_LOCAL_NODE   BGP_NLRI_TLV_LEN_IPV4_ROUTER_ID
#define BGP_NLRI_TLV_LEN_IPV6_ROUTER_ID_OF_LOCAL_NODE   BGP_NLRI_TLV_LEN_IPV6_ROUTER_ID
#define BGP_NLRI_TLV_LEN_IPV4_ROUTER_ID_OF_REMOTE_NODE  BGP_NLRI_TLV_LEN_IPV4_ROUTER_ID
#define BGP_NLRI_TLV_LEN_IPV6_ROUTER_ID_OF_REMOTE_NODE  BGP_NLRI_TLV_LEN_IPV6_ROUTER_ID
#define BGP_NLRI_TLV_LEN_LINK_LOCAL_REMOTE_IDENTIFIERS  8
#define BGP_NLRI_TLV_LEN_IPV4_INTERFACE_ADDRESS         4
#define BGP_NLRI_TLV_LEN_IPV4_NEIGHBOR_ADDRESS          4
#define BGP_NLRI_TLV_LEN_IPV6_INTERFACE_ADDRESS         16
#define BGP_NLRI_TLV_LEN_IPV6_NEIGHBOR_ADDRESS          16
#define BGP_NLRI_TLV_LEN_MULTI_TOPOLOGY_ID              2
#define BGP_NLRI_TLV_LEN_ADMINISTRATIVE_GROUP_COLOR     4
#define BGP_NLRI_TLV_LEN_MAX_LINK_BANDWIDTH             4
#define BGP_NLRI_TLV_LEN_MAX_RESERVABLE_LINK_BANDWIDTH  4
#define BGP_NLRI_TLV_LEN_UNRESERVED_BANDWIDTH           32
#define BGP_NLRI_TLV_LEN_TE_DEFAULT_METRIC_OLD          3
#define BGP_NLRI_TLV_LEN_TE_DEFAULT_METRIC_NEW          4
#define BGP_NLRI_TLV_LEN_LINK_PROTECTION_TYPE           2
#define BGP_NLRI_TLV_LEN_MPLS_PROTOCOL_MASK             1
#define BGP_NLRI_TLV_LEN_MAX_METRIC                     3
#define BGP_NLRI_TLV_LEN_IGP_FLAGS                      1
#define BGP_NLRI_TLV_LEN_PREFIX_METRIC                  4
#define BGP_NLRI_TLV_LEN_AREA_ID                        4
#define BGP_NLRI_TLV_LEN_NODE_FLAG_BITS                 1

/* draft-gredler-idr-bgp-ls-segment-routing-ext-01 */
#define BGP_LS_SR_TLV_SR_CAPABILITY                 1034
#define BGP_LS_SR_TLV_SR_ALGORITHM                  1035
#define BGP_LS_SR_TLV_ADJ_SID                       1099
#define BGP_LS_SR_TLV_LAN_ADJ_SID                   1100
#define BGP_LS_SR_TLV_PREFIX_SID                    1158
#define BGP_LS_SR_TLV_RANGE                         1159
#define BGP_LS_SR_TLV_BINDING_SID                   1160
#define BGP_LS_SR_SUBTLV_BINDING_SID_LABEL          1161
#define BGP_LS_SR_SUBTLV_BINDING_ERO_METRIC         1162
#define BGP_LS_SR_SUBTLV_BINDING_IPV4_ERO           1163
#define BGP_LS_SR_SUBTLV_BINDING_IPV6_ERO           1164
#define BGP_LS_SR_SUBTLV_BINDING_UNNUM_IFID_ERO     1165
#define BGP_LS_SR_SUBTLV_BINDING_IPV4_BAK_ERO       1166
#define BGP_LS_SR_SUBTLV_BINDING_IPV6_BAK_ERO       1167
#define BGP_LS_SR_SUBTLV_BINDING_UNNUM_IFID_BAK_ERO 1168

/* Prefix-SID TLV flags, draft-gredler-idr-bgp-ls-segment-routing-ext-01:

                             0  1  2  3  4  5  6  7
                            +--+--+--+--+--+--+--+--+
   if Protocol-ID is IS-IS  |R |N |P |E |V |L |  |  |
                            +--+--+--+--+--+--+--+--+

                             0  1  2  3  4  5  6  7
                            +--+--+--+--+--+--+--+--+
   if Protocol-ID is OSPF   |  |NP|M |E |V |L |  |  |
                            +--+--+--+--+--+--+--+--+
*/
#define BGP_LS_SR_PREFIX_SID_FLAG_R  0x80
#define BGP_LS_SR_PREFIX_SID_FLAG_N  0x40
#define BGP_LS_SR_PREFIX_SID_FLAG_NP 0x40
#define BGP_LS_SR_PREFIX_SID_FLAG_P  0x20
#define BGP_LS_SR_PREFIX_SID_FLAG_M  0x20
#define BGP_LS_SR_PREFIX_SID_FLAG_E  0x10
#define BGP_LS_SR_PREFIX_SID_FLAG_V  0x08
#define BGP_LS_SR_PREFIX_SID_FLAG_L  0x04

/* Adjacency-SID TLV flags, draft-gredler-idr-bgp-ls-segment-routing-ext-01:

                             0  1  2  3  4  5  6  7
                            +--+--+--+--+--+--+--+--+
   if Protocol-ID is IS-IS  |F |B |V |L |S |  |  |  |
                            +--+--+--+--+--+--+--+--+

                             0  1  2  3  4  5  6  7
                            +--+--+--+--+--+--+--+--+
   if Protocol-ID is OSPF   |B |V |L |S |  |  |  |  |
                            +--+--+--+--+--+--+--+--+
*/
#define BGP_LS_SR_ADJACENCY_SID_FLAG_FI 0x80
#define BGP_LS_SR_ADJACENCY_SID_FLAG_BO 0x80
#define BGP_LS_SR_ADJACENCY_SID_FLAG_BI 0x40
#define BGP_LS_SR_ADJACENCY_SID_FLAG_VO 0x40
#define BGP_LS_SR_ADJACENCY_SID_FLAG_VI 0x20
#define BGP_LS_SR_ADJACENCY_SID_FLAG_LO 0x20
#define BGP_LS_SR_ADJACENCY_SID_FLAG_LI 0x10
#define BGP_LS_SR_ADJACENCY_SID_FLAG_SO 0x10
#define BGP_LS_SR_ADJACENCY_SID_FLAG_SI 0x08

/* SR-Capabilities TLV flags, draft-gredler-idr-bgp-ls-segment-routing-ext-01:

                             0  1  2  3  4  5  6  7
                            +--+--+--+--+--+--+--+--+
   if Protocol-ID is IS-IS  |I |V |H |  |  |  |  |  |
                            +--+--+--+--+--+--+--+--+
*/
#define BGP_LS_SR_CAPABILITY_FLAG_I 0x80
#define BGP_LS_SR_CAPABILITY_FLAG_V 0x40
#define BGP_LS_SR_CAPABILITY_FLAG_H 0x20

static const value_string bgptypevals[] = {
    { BGP_OPEN,                "OPEN Message" },
    { BGP_UPDATE,              "UPDATE Message" },
    { BGP_NOTIFICATION,        "NOTIFICATION Message" },
    { BGP_KEEPALIVE,           "KEEPALIVE Message" },
    { BGP_ROUTE_REFRESH,       "ROUTE-REFRESH Message" },
    { BGP_CAPABILITY,          "CAPABILITY Message" },
    { BGP_ROUTE_REFRESH_CISCO, "Cisco ROUTE-REFRESH Message" },
    { 0, NULL }
};

static const value_string evpnrtypevals[] = {
    { EVPN_AD_ROUTE,           "Ethernet AD Route" },
    { EVPN_MAC_ROUTE,          "MAC Advertisement Route" },
    { EVPN_INC_MCAST_TREE,     "Inclusive Multicast Route" },
    { EVPN_ETH_SEGMENT_ROUTE,  "Ethernet Segment Route" },
    { EVPN_IP_PREFIX_ROUTE,    "IP Prefix route"},
    { 0, NULL }
};

static const value_string evpn_nlri_esi_type[] = {
    { BGP_NLRI_EVPN_ESI_VALUE,      "ESI 9 bytes value" },
    { BGP_NLRI_EVPN_ESI_LACP,       "ESI LACP 802.1AX defined" },
    { BGP_NLRI_EVPN_ESI_MSTP,       "ESI mSTP defined" },
    { BGP_NLRI_EVPN_ESI_MAC,        "ESI MAC address defined" },
    { BGP_NLRI_EVPN_ESI_RID,        "ESI Router ID" },
    { BGP_NLRI_EVPN_ESI_ASN,        "ESI autonomous system" },
    { BGP_NLRI_EVPN_ESI_RES,        "ESI reserved" },
    { 0, NULL }
};

#define BGP_MAJOR_ERROR_MSG_HDR       1
#define BGP_MAJOR_ERROR_OPEN_MSG      2
#define BGP_MAJOR_ERROR_UPDATE_MSG    3
#define BGP_MAJOR_ERROR_HT_EXPIRED    4
#define BGP_MAJOR_ERROR_STATE_MACHINE 5
#define BGP_MAJOR_ERROR_CEASE         6
#define BGP_MAJOR_ERROR_CAP_MSG       7

static const value_string bgpnotify_major[] = {
    { BGP_MAJOR_ERROR_MSG_HDR,       "Message Header Error" },
    { BGP_MAJOR_ERROR_OPEN_MSG,      "OPEN Message Error" },
    { BGP_MAJOR_ERROR_UPDATE_MSG,    "UPDATE Message Error" },
    { BGP_MAJOR_ERROR_HT_EXPIRED,    "Hold Timer Expired" },
    { BGP_MAJOR_ERROR_STATE_MACHINE, "Finite State Machine Error" },
    { BGP_MAJOR_ERROR_CEASE,         "Cease" },
    { BGP_MAJOR_ERROR_CAP_MSG,       "CAPABILITY Message Error" },
    { 0, NULL }
};

static const value_string bgpnotify_minor_msg_hdr[] = {
    { 1, "Connection Not Synchronized" },
    { 2, "Bad Message Length" },
    { 3, "Bad Message Type" },
    { 0, NULL }
};

static const value_string bgpnotify_minor_open_msg[] = {
    { 1, "Unsupported Version Number" },
    { 2, "Bad Peer AS" },
    { 3, "Bad BGP Identifier" },
    { 4, "Unsupported Optional Parameter" },
    { 5, "Authentication Failure [Deprecated]" },
    { 6, "Unacceptable Hold Time" },
    { 7, "Unsupported Capability" },
    { 0, NULL }
};

static const value_string bgpnotify_minor_update_msg[] = {
    { 1,  "Malformed Attribute List" },
    { 2,  "Unrecognized Well-known Attribute" },
    { 3,  "Missing Well-known Attribute" },
    { 4,  "Attribute Flags Error" },
    { 5,  "Attribute Length Error" },
    { 6,  "Invalid ORIGIN Attribute" },
    { 7,  "AS Routing Loop [Deprecated]" },
    { 8,  "Invalid NEXT_HOP Attribute" },
    { 9,  "Optional Attribute Error" },
    { 10, "Invalid Network Field" },
    { 11, "Malformed AS_PATH" },
    { 0, NULL }
};
/* RFC6608 Subcodes for BGP Finite State Machine Error */
static const value_string bgpnotify_minor_state_machine[] = {
    { 1, "Receive Unexpected Message in OpenSent State" },
    { 2, "Receive Unexpected Message in OpenConfirm State" },
    { 3, "Receive Unexpected Message in Established State" },
    { 0, NULL }
};

/* RFC4486 Subcodes for BGP Cease Notification Message */
static const value_string bgpnotify_minor_cease[] = {
    { 1, "Maximum Number of Prefixes Reached"},
    { 2, "Administratively Shutdown"},
    { 3, "Peer De-configured"},
    { 4, "Administratively Reset"},
    { 5, "Connection Rejected"},
    { 6, "Other Configuration Change"},
    { 7, "Connection Collision Resolution"},
    { 8, "Out of Resources"},
    { 0, NULL }
};

static const value_string bgpnotify_minor_cap_msg[] = {
    { 1, "Invalid Action Value" },
    { 2, "Invalid Capability Length" },
    { 3, "Malformed Capability Value" },
    { 4, "Unsupported Capability Code" },
    { 0, NULL }
};

static const value_string bgpattr_origin[] = {
    { 0, "IGP" },
    { 1, "EGP" },
    { 2, "INCOMPLETE" },
    { 0, NULL }
};

static const value_string bgp_open_opt_vals[] = {
    { BGP_OPTION_AUTHENTICATION, "Authentication" },
    { BGP_OPTION_CAPABILITY, "Capability" },
    { 0, NULL }
};

static const value_string as_segment_type[] = {
    { 1, "AS_SET" },
    { 2, "AS_SEQUENCE" },
/* RFC1965 has the wrong values, corrected in  */
/* draft-ietf-idr-bgp-confed-rfc1965bis-01.txt */
    { 4, "AS_CONFED_SET" },
    { 3, "AS_CONFED_SEQUENCE" },
    { 0, NULL }
};

static const value_string bgpattr_type[] = {
    { BGPTYPE_ORIGIN,              "ORIGIN" },
    { BGPTYPE_AS_PATH,             "AS_PATH" },
    { BGPTYPE_NEXT_HOP,            "NEXT_HOP" },
    { BGPTYPE_MULTI_EXIT_DISC,     "MULTI_EXIT_DISC" },
    { BGPTYPE_LOCAL_PREF,          "LOCAL_PREF" },
    { BGPTYPE_ATOMIC_AGGREGATE,    "ATOMIC_AGGREGATE" },
    { BGPTYPE_AGGREGATOR,          "AGGREGATOR" },
    { BGPTYPE_COMMUNITIES,         "COMMUNITIES" },
    { BGPTYPE_ORIGINATOR_ID,       "ORIGINATOR_ID" },
    { BGPTYPE_CLUSTER_LIST,        "CLUSTER_LIST" },
    { BGPTYPE_MP_REACH_NLRI,       "MP_REACH_NLRI" },
    { BGPTYPE_MP_UNREACH_NLRI,     "MP_UNREACH_NLRI" },
    { BGPTYPE_EXTENDED_COMMUNITY,  "EXTENDED_COMMUNITIES" },
    { BGPTYPE_AS4_PATH,            "AS4_PATH" },
    { BGPTYPE_AS4_AGGREGATOR,      "AS4_AGGREGATOR" },
    { BGPTYPE_SAFI_SPECIFIC_ATTR,  "SAFI_SPECIFIC_ATTRIBUTE" },
    { BGPTYPE_TUNNEL_ENCAPS_ATTR,  "TUNNEL_ENCAPSULATION_ATTRIBUTE" },
    { BGPTYPE_PMSI_TUNNEL_ATTR,    "PMSI_TUNNEL_ATTRIBUTE" },
    { BGPTYPE_AIGP,                "AIGP"},
    { BGPTYPE_LINK_STATE_ATTR,     "LINK_STATE" },
    { BGPTYPE_LINK_STATE_OLD_ATTR, "LINK_STATE (unofficial code point)" },
    { BGPTYPE_ATTR_SET,            "ATTR_SET" },
    { 0, NULL }
};

static const value_string pmsi_tunnel_type[] = {
    { PMSI_TUNNEL_NOPRESENT,      "Type is not present" },
    { PMSI_TUNNEL_RSVPTE_P2MP,    "RSVP-TE P2MP LSP" },
    { PMSI_TUNNEL_MLDP_P2MP,      "mLDP P2MP LSP" },
    { PMSI_TUNNEL_PIMSSM,         "PIM SSM Tree" },
    { PMSI_TUNNEL_PIMSM,          "PIM SM Tree" },
    { PMSI_TUNNEL_BIDIR_PIM,      "BIDIR-PIM Tree" },
    { PMSI_TUNNEL_INGRESS,        "Ingress Replication" },
    { PMSI_TUNNEL_MLDP_MP2MP,     "mLDP MP2MP LSP" },
    { 0, NULL }
};

static const value_string aigp_tlv_type[] = {
    { AIGP_TLV_TYPE,            "Type AIGP TLV" },
    { 0, NULL }
};

static const value_string pmsi_mldp_fec_opaque_value_type[] = {
    { PMSI_MLDP_FEC_TYPE_RSVD,          "Reserved" },
    { PMSI_MLDP_FEC_TYPE_GEN_LSP,       "Generic LSP Identifier" },
    { PMSI_MLDP_FEC_TYPE_EXT_TYPE,      "Extended Type field in the following two bytes" },
    { 0, NULL}
};

static const value_string pmsi_mldp_fec_opa_extented_type[] = {
    { PMSI_MLDP_FEC_ETYPE_RSVD,         "Reserved" },
    { 0, NULL}
};

static const value_string bgp_attr_tunnel_type[] = {
    { TUNNEL_TYPE_L2TP_OVER_IP, "L2TP_OVER_IP" },
    { TUNNEL_TYPE_GRE,          "GRE" },
    { TUNNEL_TYPE_IP_IN_IP,     "IP_IN_IP" },
    { 0, NULL }
};

static const value_string subtlv_type[] = {
    { TUNNEL_SUBTLV_ENCAPSULATION, "ENCAPSULATION" },
    { TUNNEL_SUBTLV_PROTO_TYPE,    "PROTOCOL_TYPE" },
    { TUNNEL_SUBTLV_COLOR,         "COLOR" },
    { TUNNEL_SUBTLV_LOAD_BALANCE,  "LOAD_BALANCE" },
    { 0, NULL }
};

static const value_string bgpext_com_type_high[] = {
    { BGP_EXT_COM_TYPE_HIGH_TR_AS2,         "Transitive Two-Octet AS" },
    { BGP_EXT_COM_TYPE_HIGH_TR_IP4,         "Transitive IPv4-Address" },
    { BGP_EXT_COM_TYPE_HIGH_TR_AS4,         "Transitive Four-Octet AS" },
    { BGP_EXT_COM_TYPE_HIGH_TR_OPAQUE,      "Transitive Opaque" },
    { BGP_EXT_COM_TYPE_HIGH_TR_QOS,         "Transitive QoS Marking" },
    { BGP_EXT_COM_TYPE_HIGH_TR_COS,         "Transitive CoS Capability" },
    { BGP_EXT_COM_TYPE_HIGH_TR_EVPN,        "Transitive EVPN" },
    { BGP_EXT_COM_TYPE_HIGH_TR_FLOW,        "Transitive Flow spec redirect/mirror to IP next-hop" },
    { BGP_EXT_COM_TYPE_HIGH_TR_EXP,         "Transitive Experimental"},
    { BGP_EXT_COM_TYPE_HIGH_TR_EXP_FSIP4,   "Transitive Experimental Redirect IPv4"},
    { BGP_EXT_COM_TYPE_HIGH_TR_EXP_FSAS4,   "Transitive Experimental Redirect AS4"},
    { BGP_EXT_COM_TYPE_HIGH_NTR_AS2,        "Non-Transitive Two-Octet AS" },
    { BGP_EXT_COM_TYPE_HIGH_NTR_IP4,        "Non-Transitive IPv4-Address" },
    { BGP_EXT_COM_TYPE_HIGH_NTR_AS4,        "Non-Transitive Four-Octet AS" },
    { BGP_EXT_COM_TYPE_HIGH_NTR_OPAQUE,     "Non-Transitive Opaque" },
    { BGP_EXT_COM_TYPE_HIGH_NTR_QOS,        "Non-Transive QoS Marking" },
    { 0, NULL}
};

static const value_string bgpext_com_stype_tr_exp_fs_ip4[] = {
    { BGP_EXT_COM_STYPE_EXP_F_RED_IP4,      "Route Target"},
    { 0, NULL}
};

static const value_string bgpext_com_stype_tr_exp_fs_as4[] = {
    { BGP_EXT_COM_STYPE_EXP_F_RED_AS4,      "Route Target"},
    { 0, NULL}
};

static const value_string bgpext_com_stype_tr_evpn[] = {
    { BGP_EXT_COM_STYPE_EPVN_MMAC,  "MAC Mobility" },
    { BGP_EXT_COM_STYPE_EVPN_LABEL, "ESI MPLS Label" },
    { BGP_EXT_COM_STYPE_EVPN_IMP,   "ES Import" },
    { 0, NULL}
};

static const value_string bgpext_com_stype_tr_as2[] = {
    { BGP_EXT_COM_STYPE_AS2_RT,     "Route Target" },
    { BGP_EXT_COM_STYPE_AS2_RO,     "Route Origin" },
    { BGP_EXT_COM_STYPE_AS2_OSPF,   "OSPF Domain Identifier" },
    { BGP_EXT_COM_STYPE_AS2_DCOLL,  "BGP Data Collection" },
    { BGP_EXT_COM_STYPE_AS2_SRC_AS, "Source AS" },
    { BGP_EXT_COM_STYPE_AS2_L2VPN,  "L2VPN Identifier" },
    { BGP_EXT_COM_STYPE_AS2_CVPND,  "Cisco VPN-Distinguisher" },
    { 0, NULL}
};

static const value_string bgpext_com_stype_ntr_as2[] = {
    { BGP_EXT_COM_STYPE_AS2_LBW, "Link Bandwidth" },
    { BGP_EXT_COM_STYPE_AS2_VNI, "Virtual-Network Identifier" },
    { 0, NULL}
};

static const value_string bgpext_com_stype_tr_as4[] = {
    { BGP_EXT_COM_STYPE_AS4_RT,     "Route Target" },
    { BGP_EXT_COM_STYPE_AS4_RO,     "Route Origin" },
    { BGP_EXT_COM_STYPE_AS4_GEN,    "Generic" },
    { BGP_EXT_COM_STYPE_AS4_OSPF,   "OSPF Domain Identifier" },
    { BGP_EXT_COM_STYPE_AS4_S_AS,   "Source AS" },
    { BGP_EXT_COM_STYPE_AS4_CIS_V,  "Cisco VPN Identifier" },
    { 0, NULL}
};

static const value_string bgpext_com_stype_ntr_as4[] = {
    { BGP_EXT_COM_STYPE_AS4_GEN, "Generic" },
    { 0, NULL}
};

static const value_string bgpext_com_stype_tr_IP4[] = {
    { BGP_EXT_COM_STYPE_IP4_RT,     "Route Target" },
    { BGP_EXT_COM_STYPE_IP4_RO,     "Route Origin" },
    { BGP_EXT_COM_STYPE_IP4_OSPF_D, "OSPF Domain Identifier" },
    { BGP_EXT_COM_STYPE_IP4_OSPF_R, "OSPF Route ID" },
    { BGP_EXT_COM_STYPE_IP4_L2VPN,  "L2VPN Identifier" },
    { BGP_EXT_COM_STYPE_IP4_VRF_I,  "VRF Route Import" },
    { BGP_EXT_COM_STYPE_IP4_CIS_D,  "Cisco VPN-Distinguisher" },
    { BGP_EXT_COM_STYPE_IP4_SEG_NH, "Inter-area P2MP Segmented Next-Hop" },
    { 0, NULL}
};

static const value_string bgpext_com_stype_tr_opaque[] = {
    { BGP_EXT_COM_STYPE_OPA_OSPF,   "OSPF Route Type" },
    { BGP_EXT_COM_STYPE_OPA_COLOR,  "Color" },
    { BGP_EXT_COM_STYPE_OPA_ENCAP,  "Encapsulation" },
    { BGP_EXT_COM_STYPE_OPA_DGTW,   "Default Gateway" },
    { 0, NULL}
};

static const value_string bgpext_com_tunnel_type[] = {
    { BGP_EXT_COM_TUNNEL_RESERVED,      "Reserved" },
    { BGP_EXT_COM_TUNNEL_L2TPV3,        "L2TPv3 over IP" },
    { BGP_EXT_COM_TUNNEL_GRE,           "GRE" },
    { BGP_EXT_COM_TUNNEL_ENDP,          "Transmit tunnel endpoint" },
    { BGP_EXT_COM_TUNNEL_IPSEC,         "IPsec in Tunnel-mode" },
    { BGP_EXT_COM_TUNNEL_IPIPSEC,       "IP in IP tunnel with IPsec Transport Mode" },
    { BGP_EXT_COM_TUNNEL_MPLSIP,        "MPLS-in-IP tunnel with IPsec Transport Mode" },
    { BGP_EXT_COM_TUNNEL_IPIP,          "IP in IP" },
    { BGP_EXT_COM_TUNNEL_VXLAN,         "VXLAN Encapsulation" },
    { BGP_EXT_COM_TUNNEL_NVGRE,         "NVGRE Encapsulation" },
    { BGP_EXT_COM_TUNNEL_MPLS,          "MPLS Encapsulation" },
    { BGP_EXT_COM_TUNNEL_MPLSGRE,       "MPLS in GRE Encapsulation" },
    { BGP_EXT_COM_TUNNEL_VXLANGPE,      "VxLAN GPE Encapsulation" },
    { BGP_EXT_COM_TUNNEL_MPLSUDP,       "MPLS in UDP Encapsulation" },
    { 0, NULL}
};

static const value_string bgpext_com_stype_ntr_opaque[] = {
    { BGP_EXT_COM_STYPE_OPA_OR_VAL_ST,  "BGP Origin Validation state" },
    { 0, NULL}
};

static const value_string bgpext_com_stype_tr_exp[] = {
    { BGP_EXT_COM_STYPE_EXP_F_TR,       "Flow spec traffic-rate" },
    { BGP_EXT_COM_STYPE_EXP_F_TA,       "Flow spec traffic-action" },
    { BGP_EXT_COM_STYPE_EXP_F_RED,      "Flow spec redirect AS 2 bytes" },
    { BGP_EXT_COM_STYPE_EXP_F_RMARK,    "Flow spec traffic-remarking" },
    { BGP_EXT_COM_STYPE_EXP_L2,         "Layer2 Info" },
    { 0, NULL}
};


static const value_string flow_spec_op_len_val[] = {
    { 0, "1 byte: 1 <<"  },
    { 1, "2 bytes: 1 <<" },
    { 2, "4 bytes: 1 <<" },
    { 3, "8 bytes: 1 <<" },
    { 0, NULL  }
};

static const value_string qos_tech_type[] = {
    { QOS_TECH_TYPE_DSCP,         "DiffServ enabled IP (DSCP encoding)" },
    { QOS_TECH_TYPE_802_1q,       "Ethernet using 802.1q priority tag" },
    { QOS_TECH_TYPE_E_LSP,        "MPLS using E-LSP" },
    { QOS_TECH_TYPE_VC,           "Virtual Channel (VC) encoding" },
    { QOS_TECH_TYPE_GMPLS_TIME,   "GMPLS - time slot encoding" },
    { QOS_TECH_TYPE_GMPLS_LAMBDA, "GMPLS - lambda encoding" },
    { QOS_TECH_TYPE_GMPLS_FIBRE,  "GMPLS - fibre encoding" },
    { 0, NULL }
};

static const value_string bgp_ssa_type[] = {
    { BGP_SSA_L2TPv3 ,          "L2TPv3 Tunnel" },
    { BGP_SSA_mGRE ,            "mGRE Tunnel" },
    { BGP_SSA_IPSec ,           "IPSec Tunnel" },
    { BGP_SSA_MPLS ,            "MPLS Tunnel" },
    { BGP_SSA_L2TPv3_IN_IPSec , "L2TPv3 in IPSec Tunnel" },
    { BGP_SSA_mGRE_IN_IPSec ,   "mGRE in IPSec Tunnel" },
    { 0, NULL }
};

static const value_string bgp_l2vpn_encaps[] = {
    { 0,  "Reserved"},
    { 1,  "Frame Relay"},
    { 2,  "ATM AAL5 SDU VCC transport"},
    { 3,  "ATM transparent cell transport"},
    { 4,  "Ethernet (VLAN) Tagged mode"},
    { 5,  "Ethernet raw mode"},
    { 6,  "Cisco-HDLC"},
    { 7,  "PPP"},
    { 8,  "SONET/SDH CES"},
    { 9,  "ATM n-to-one VCC cell transport"},
    { 10, "ATM n-to-one VPC cell transport"},
    { 11, "IP layer 2 transport"},
    { 15, "Frame relay port mode"},
    { 17, "Structure agnostic E1 over packet"},
    { 18, "Structure agnostic T1 over packet"},
    { 19, "VPLS"},
    { 20, "Structure agnostic T3 over packet"},
    { 21, "Nx64kbit/s Basic Service using Structure-aware"},
    { 25, "Frame Relay DLCI"},
    { 40, "Structure agnostic E3 over packet"},
    { 41, "Octet-aligned playload for structure-agnostic DS1 circuits"},
    { 42, "E1 Nx64kbit/s with CAS using Structure-aware"},
    { 43, "DS1 (ESF) Nx64kbit/s with CAS using Structure-aware"},
    { 44, "DS1 (SF) Nx64kbit/s with CAS using Structure-aware"},
    { 64, "IP-interworking"},
    { 0, NULL }
};

static const value_string bgpext_com_ospf_rtype[] = {
  { BGP_OSPF_RTYPE_RTR, "Router" },
  { BGP_OSPF_RTYPE_NET, "Network" },
  { BGP_OSPF_RTYPE_SUM, "Summary" },
  { BGP_OSPF_RTYPE_EXT, "External" },
  { BGP_OSPF_RTYPE_NSSA,"NSSA External" },
  { BGP_OSPF_RTYPE_SHAM,"MPLS-VPN Sham" },
  { 0, NULL }
};

/* Subsequent address family identifier, RFC2858 */
static const value_string bgpattr_nlri_safi[] = {
    { 0,                        "Reserved" },
    { SAFNUM_UNICAST,           "Unicast" },
    { SAFNUM_MULCAST,           "Multicast" },
    { SAFNUM_UNIMULC,           "Unicast+Multicast" },
    { SAFNUM_MPLS_LABEL,        "Labeled Unicast"},
    { SAFNUM_MCAST_VPN,         "MCAST-VPN"},
    { SAFNUM_ENCAPSULATION,     "Encapsulation"},
    { SAFNUM_TUNNEL,            "Tunnel"},
    { SAFNUM_VPLS,              "VPLS"},
    { SAFNUM_LINK_STATE,        "Link State"},
    { SAFNUM_LAB_VPNUNICAST,    "Labeled VPN Unicast" },        /* draft-rosen-rfc2547bis-03 */
    { SAFNUM_LAB_VPNMULCAST,    "Labeled VPN Multicast" },
    { SAFNUM_LAB_VPNUNIMULC,    "Labeled VPN Unicast+Multicast" },
    { SAFNUM_ROUTE_TARGET,      "Route Target Filter" },
    { SAFNUM_EVPN,              "EVPN" },
    { SAFNUM_FSPEC_RULE,        "Flow Spec Filter" },
    { SAFNUM_FSPEC_VPN_RULE,    "Flow Spec Filter VPN" },
    { 0, NULL }
};

/* ORF Type, RFC5291 */
static const value_string orf_type_vals[] = {
    {   2,      "Communities ORF-Type" },
    {   3,      "Extended Communities ORF-Type" },
    { 128,      "Cisco PrefixList ORF-Type" },
    { 129,      "Cisco CommunityList ORF-Type" },
    { 130,      "Cisco Extended CommunityList ORF-Type" },
    { 131,      "Cisco AsPathList ORF-Type" },
    { 0,        NULL }
};

/* ORF Send/Receive, RFC5291 */
static const value_string orf_send_recv_vals[] = {
    { 1,        "Receive" },
    { 2,        "Send" },
    { 3,        "Both" },
    { 0,        NULL }
};

/* ORF Send/Receive, RFC5291 */
static const value_string orf_when_vals[] = {
    { 1,        "Immediate" },
    { 2,        "Defer" },
    { 0,        NULL }
};

static const value_string orf_entry_action_vals[] = {
    { BGP_ORF_ADD,          "Add" },
    { BGP_ORF_REMOVE,       "Remove" },
    { BGP_ORF_REMOVEALL,    "RemoveAll" },
    { 0,        NULL }
};

static const value_string orf_entry_match_vals[] = {
    { BGP_ORF_PERMIT,   "Permit" },
    { BGP_ORF_DENY,     "Deny" },
    { 0,        NULL }
};

static const value_string capability_vals[] = {
    { BGP_CAPABILITY_RESERVED,                      "Reserved capability" },
    { BGP_CAPABILITY_MULTIPROTOCOL,                 "Multiprotocol extensions capability" },
    { BGP_CAPABILITY_ROUTE_REFRESH,                 "Route refresh capability" },
    { BGP_CAPABILITY_COOPERATIVE_ROUTE_FILTERING,   "Cooperative route filtering capability" },
    { BGP_CAPABILITY_MULTIPLE_ROUTE_DEST,           "Multiple routes to a destination capability" },
    { BGP_CAPABILITY_EXTENDED_NEXT_HOP,             "Extended Next Hop Encoding" },
    { BGP_CAPABILITY_EXTENDED_MESSAGE,              "BGP-Extended Message" },
    { BGP_CAPABILITY_GRACEFUL_RESTART,              "Graceful Restart capability" },
    { BGP_CAPABILITY_4_OCTET_AS_NUMBER,             "Support for 4-octet AS number capability" },
    { BGP_CAPABILITY_DYNAMIC_CAPABILITY,            "Support for Dynamic capability" },
    { BGP_CAPABILITY_MULTISESSION,                  "Multisession BGP Capability" },
    { BGP_CAPABILITY_ADDITIONAL_PATHS,              "Support for Additional Paths" },
    { BGP_CAPABILITY_ENHANCED_ROUTE_REFRESH,        "Enhanced route refresh capability" },
    { BGP_CAPABILITY_LONG_LIVED_GRACEFUL_RESTART,   "Long-Lived Graceful Restart (LLGR) Capability" },
    { BGP_CAPABILITY_CP_ORF,                        "CP-ORF Capability" },
    { BGP_CAPABILITY_FQDN,                          "FQDN Capability" },
    { BGP_CAPABILITY_ROUTE_REFRESH_CISCO,           "Route refresh capability" },
    { BGP_CAPABILITY_ORF_CISCO,                     "Cooperative route filtering capability" },
    { 0, NULL }
};

static const value_string community_vals[] = {
    { BGP_COMM_NO_EXPORT,           "NO_EXPORT" },
    { BGP_COMM_NO_ADVERTISE,        "NO_ADVERTISE" },
    { BGP_COMM_NO_EXPORT_SUBCONFED, "NO_EXPORT_SUBCONFED" },
    { 0,                            NULL }
};

/* Capability Message action code */
static const value_string bgpcap_action[] = {
    { 0, "advertising a capability" },
    { 1, "removing a capability" },
    { 0, NULL }
};

static const value_string mcast_vpn_route_type[] = {
    { MCAST_VPN_RTYPE_INTRA_AS_IPMSI_AD, "Intra-AS I-PMSI A-D route" },
    { MCAST_VPN_RTYPE_INTER_AS_IPMSI_AD, "Inter-AS I-PMSI A-D route" },
    { MCAST_VPN_RTYPE_SPMSI_AD         , "S-PMSI A-D route" },
    { MCAST_VPN_RTYPE_LEAF_AD          , "Leaf A-D route" },
    { MCAST_VPN_RTYPE_SOURCE_ACTIVE_AD , "Source Active A-D route" },
    { MCAST_VPN_RTYPE_SHARED_TREE_JOIN , "Shared Tree Join route" },
    { MCAST_VPN_RTYPE_SOURCE_TREE_JOIN , "Source Tree Join route" },
    { 0, NULL }
};

/* NLRI type value_string as defined in idr-ls */
static const value_string bgp_ls_nlri_type_vals[] = {
        { LINK_STATE_LINK_NLRI,                 "Link NLRI" },
        { LINK_STATE_NODE_NLRI,                 "Node NLRI" },
        { LINK_STATE_IPV4_TOPOLOGY_PREFIX_NLRI, "IPv4 Topology Prefix NLRI" },
        { LINK_STATE_IPV6_TOPOLOGY_PREFIX_NLRI, "IPv6 Topology Prefix NLRI" },
        {0, NULL },
};

/* Link-State NLRI Protocol-ID value strings */
static const value_string link_state_nlri_protocol_id_values[] = {
        {BGP_LS_NLRI_PROTO_ID_UNKNOWN, "Unknown" },
        {BGP_LS_NLRI_PROTO_ID_IS_IS_LEVEL_1, "IS-IS Level 1"},
        {BGP_LS_NLRI_PROTO_ID_IS_IS_LEVEL_2, "IS-IS Level 2"},
        {BGP_LS_NLRI_PROTO_ID_OSPF, "OSPF"},
        {BGP_LS_NLRI_PROTO_ID_DIRECT, "Direct"},
        {BGP_LS_NLRI_PROTO_ID_STATIC, "Static"},
        {0, NULL},
};

/* Link-State routing universes */
static const val64_string link_state_nlri_routing_universe_values[] = {
        {BGP_LS_NLRI_ROUTING_UNIVERSE_LEVEL_3, "L3 packet topology" },
        {BGP_LS_NLRI_ROUTING_UNIVERSE_LEVEL_1, "L1 optical topology"},
        {0, NULL}
};

/* Link state prefix NLRI OSPF Route Type */
static const value_string link_state_prefix_descriptors_ospf_route_type[] = {
        {BGP_LS_PREFIX_OSPF_ROUTE_TYPE_UNKNOWN,     "Unknown" },
        {BGP_LS_PREFIX_OSPF_ROUTE_TYPE_INTRA_AREA,  "Intra-Area"},
        {BGP_LS_PREFIX_OSPF_ROUTE_TYPE_INTER_AREA,  "Inter Area"},
        {BGP_LS_PREFIX_OSPF_ROUTE_TYPE_EXTERNAL_1,  "External 1"},
        {BGP_LS_PREFIX_OSPF_ROUTE_TYPE_EXTERNAL_2,  "External 2"},
        {BGP_LS_PREFIX_OSPF_ROUTE_TYPE_NSSA_1,      "NSSA 1"},
        {BGP_LS_PREFIX_OSPF_ROUTE_TYPE_NSSA_2,      "NSSA 2"},
        {0, NULL}
};

/* NLRI type value_string as define in BGP flow spec RFC */

static const value_string flowspec_nlri_opvaluepair_type[] = {
    { BGPNLRI_FSPEC_DST_PFIX, "Destination prefix filter" },
    { BGPNLRI_FSPEC_SRC_PFIX, "Source prefix filter" },
    { BGPNLRI_FSPEC_IP_PROTO, "Protocol / Next Header filter" },
    { BGPNLRI_FSPEC_PORT,     "Port filter" },
    { BGPNLRI_FSPEC_DST_PORT, "Destination port filter" },
    { BGPNLRI_FSPEC_SRC_PORT, "Source port filter" },
    { BGPNLRI_FSPEC_ICMP_TP,  "ICMP type filter" },
    { BGPNLRI_FSPEC_ICMP_CD,  "ICMP code filter" },
    { BGPNLRI_FSPEC_TCP_FLAGS,"TCP flags filter" },
    { BGPNLRI_FSPEC_PCK_LEN,  "Packet Length filter" },
    { BGPNLRI_FSPEC_DSCP,     "DSCP marking filter" },
    { BGPNLRI_FSPEC_FRAGMENT, "IP fragment filter" },
    {0, NULL },
};
#define BGPNLRI_FSPEC_FRAGMENT     12 /* RFC 5575         */

/* Subtype Route Refresh, draft-ietf-idr-bgp-enhanced-route-refresh-02 */
static const value_string route_refresh_subtype_vals[] = {
    { 0, "Normal route refresh request [RFC2918] with/without ORF [RFC5291]" },
    { 1, "Demarcation of the beginning of a route refresh" },
    { 2, "Demarcation of the ending of a route refresh" },
    { 0,  NULL }
};

static const true_false_string tfs_optional_wellknown = { "Optional", "Well-known" };
static const true_false_string tfs_transitive_non_transitive = { "Transitive", "Non-transitive" };
static const true_false_string tfs_partial_complete = { "Partial", "Complete" };
static const true_false_string tfs_extended_regular_length = { "Extended length", "Regular length" };
static const true_false_string tfs_esi_label_flag = { "Single-Active redundancy", "All-Active redundancy" };

/* Maximal size of an IP address string */
#define MAX_SIZE_OF_IP_ADDR_STRING      16

static int proto_bgp = -1;

/* BGP header field initialisation */

/* global BGP header filed */

static int hf_bgp_marker = -1;
static int hf_bgp_length = -1;
static int hf_bgp_prefix_length = -1;
static int hf_bgp_rd = -1;
static int hf_bgp_continuation = -1;
static int hf_bgp_originating_as = -1;
static int hf_bgp_community_prefix = -1;
static int hf_bgp_endpoint_address = -1;
static int hf_bgp_endpoint_address_ipv6 = -1;
static int hf_bgp_label_stack = -1;
static int hf_bgp_vplsad_length = -1;
static int hf_bgp_vplsad_rd = -1;
static int hf_bgp_bgpad_pe_addr = -1;
static int hf_bgp_vplsbgp_ce_id = -1;
static int hf_bgp_vplsbgp_labelblock_offset = -1;
static int hf_bgp_vplsbgp_labelblock_size = -1;
static int hf_bgp_vplsbgp_labelblock_base = -1;
static int hf_bgp_wildcard_route_target = -1;
static int hf_bgp_type = -1;

/* BGP open message header filed */

static int hf_bgp_open_version = -1;
static int hf_bgp_open_myas = -1;
static int hf_bgp_open_holdtime = -1;
static int hf_bgp_open_identifier = -1;
static int hf_bgp_open_opt_len = -1;
static int hf_bgp_open_opt_params = -1;
static int hf_bgp_open_opt_param = -1;
static int hf_bgp_open_opt_param_type = -1;
static int hf_bgp_open_opt_param_len = -1;
static int hf_bgp_open_opt_param_auth = -1;
static int hf_bgp_open_opt_param_unknown = -1;

/* BGP notify header field */

static int hf_bgp_notify_major_error = -1;
static int hf_bgp_notify_minor_msg_hdr = -1;
static int hf_bgp_notify_minor_open_msg = -1;
static int hf_bgp_notify_minor_update_msg = -1;
static int hf_bgp_notify_minor_ht_expired = -1;
static int hf_bgp_notify_minor_state_machine = -1;
static int hf_bgp_notify_minor_cease = -1;
static int hf_bgp_notify_minor_cap_msg = -1;
static int hf_bgp_notify_minor_unknown = -1;
static int hf_bgp_notify_data = -1;

/* BGP route refresh header field */

static int hf_bgp_route_refresh_afi = -1;
static int hf_bgp_route_refresh_subtype = -1;
static int hf_bgp_route_refresh_safi = -1;
static int hf_bgp_route_refresh_orf = -1;
static int hf_bgp_route_refresh_orf_flag = -1;
static int hf_bgp_route_refresh_orf_type = -1;
static int hf_bgp_route_refresh_orf_length = -1;
static int hf_bgp_route_refresh_orf_entry_prefixlist = -1;
static int hf_bgp_route_refresh_orf_entry_action = -1;
static int hf_bgp_route_refresh_orf_entry_match = -1;
static int hf_bgp_route_refresh_orf_entry_sequence = -1;
static int hf_bgp_route_refresh_orf_entry_prefixmask_lower = -1;
static int hf_bgp_route_refresh_orf_entry_prefixmask_upper = -1;
static int hf_bgp_route_refresh_orf_entry_ip = -1;

/* BGP capabilities header field */

static int hf_bgp_cap = -1;
static int hf_bgp_cap_type = -1;
static int hf_bgp_cap_length = -1;
static int hf_bgp_cap_action = -1;
static int hf_bgp_cap_unknown = -1;
static int hf_bgp_cap_reserved = -1;
static int hf_bgp_cap_mp_afi = -1;
static int hf_bgp_cap_mp_safi = -1;
static int hf_bgp_cap_gr_timers = -1;
static int hf_bgp_cap_gr_timers_restart_flag = -1;
static int hf_bgp_cap_gr_timers_restart_time = -1;
static int hf_bgp_cap_gr_afi = -1;
static int hf_bgp_cap_gr_safi = -1;
static int hf_bgp_cap_gr_flag = -1;
static int hf_bgp_cap_gr_flag_pfs = -1;
static int hf_bgp_cap_4as = -1;
static int hf_bgp_cap_dc = -1;
static int hf_bgp_cap_ap_afi = -1;
static int hf_bgp_cap_ap_safi = -1;
static int hf_bgp_cap_ap_sendreceive = -1;
static int hf_bgp_cap_orf_afi = -1;
static int hf_bgp_cap_orf_safi = -1;
static int hf_bgp_cap_orf_number = -1;
static int hf_bgp_cap_orf_type = -1;
static int hf_bgp_cap_orf_sendreceive = -1;
static int hf_bgp_cap_fqdn_hostname_len = -1;
static int hf_bgp_cap_fqdn_hostname = -1;
static int hf_bgp_cap_fqdn_domain_name_len = -1;
static int hf_bgp_cap_fqdn_domain_name = -1;

/* BGP update global header field */
static int hf_bgp_update_withdrawn_routes_length = -1;
static int hf_bgp_update_withdrawn_routes = -1;


/* BGP update path attribute header field */
static int hf_bgp_update_total_path_attribute_length = -1;
static int hf_bgp_update_path_attributes = -1;
static int hf_bgp_update_path_attributes_unknown = -1;
static int hf_bgp_update_path_attribute_communities = -1;
static int hf_bgp_update_path_attribute_community_well_known = -1;
static int hf_bgp_update_path_attribute_community = -1;
static int hf_bgp_update_path_attribute_community_as = -1;
static int hf_bgp_update_path_attribute_community_value = -1;
static int hf_bgp_update_path_attribute = -1;
static int hf_bgp_update_path_attribute_flags = -1;
static int hf_bgp_update_path_attribute_flags_optional = -1;
static int hf_bgp_update_path_attribute_flags_transitive = -1;
static int hf_bgp_update_path_attribute_flags_partial = -1;
static int hf_bgp_update_path_attribute_flags_extended_length = -1;
static int hf_bgp_update_path_attribute_type_code = -1;
static int hf_bgp_update_path_attribute_length = -1;
static int hf_bgp_update_path_attribute_next_hop = -1;
static int hf_bgp_update_path_attribute_as_path_segment = -1;
static int hf_bgp_update_path_attribute_as_path_segment_type = -1;
static int hf_bgp_update_path_attribute_as_path_segment_length = -1;
static int hf_bgp_update_path_attribute_as_path_segment_as2 = -1;
static int hf_bgp_update_path_attribute_as_path_segment_as4 = -1;
static int hf_bgp_update_path_attribute_origin = -1;
static int hf_bgp_update_path_attribute_cluster_list = -1;
static int hf_bgp_update_path_attribute_cluster_id = -1;
static int hf_bgp_update_path_attribute_originator_id = -1;
static int hf_bgp_update_path_attribute_local_pref = -1;
static int hf_bgp_update_path_attribute_attrset_origin_as = -1;
static int hf_bgp_update_path_attribute_multi_exit_disc = -1;
static int hf_bgp_update_path_attribute_aggregator_as = -1;
static int hf_bgp_update_path_attribute_aggregator_origin = -1;
static int hf_bgp_update_path_attribute_link_state = -1;
static int hf_bgp_update_path_attribute_mp_reach_nlri_address_family = -1;
static int hf_bgp_update_path_attribute_mp_reach_nlri_safi = -1;
static int hf_bgp_update_path_attribute_mp_reach_nlri_next_hop = -1;
static int hf_bgp_update_path_attribute_mp_reach_nlri_nbr_snpa = -1;
static int hf_bgp_update_path_attribute_mp_reach_nlri_snpa_length = -1;
static int hf_bgp_update_path_attribute_mp_reach_nlri_snpa = -1;
static int hf_bgp_update_path_attribute_mp_unreach_nlri_address_family = -1;
static int hf_bgp_update_path_attribute_mp_unreach_nlri_safi = -1;
static int hf_bgp_update_path_attribute_aigp = -1;
static int hf_bgp_evpn_nlri = -1;
static int hf_bgp_evpn_nlri_rt = -1;
static int hf_bgp_evpn_nlri_len = -1;
static int hf_bgp_evpn_nlri_rd = -1;
static int hf_bgp_evpn_nlri_esi = -1;
static int hf_bgp_evpn_nlri_esi_type = -1;
static int hf_bgp_evpn_nlri_esi_lacp_mac = -1;
static int hf_bgp_evpn_nlri_esi_portk = -1;
static int hf_bgp_evpn_nlri_esi_remain = -1;
static int hf_bgp_evpn_nlri_esi_value = -1;
static int hf_bgp_evpn_nlri_esi_rb_mac = -1;
static int hf_bgp_evpn_nlri_esi_rbprio = -1;
static int hf_bgp_evpn_nlri_esi_sys_mac = -1;
static int hf_bgp_evpn_nlri_esi_mac_discr = -1;
static int hf_bgp_evpn_nlri_esi_router_id = -1;
static int hf_bgp_evpn_nlri_esi_router_discr = -1;
static int hf_bgp_evpn_nlri_esi_asn = -1;
static int hf_bgp_evpn_nlri_esi_asn_discr = -1;
static int hf_bgp_evpn_nlri_esi_reserved = -1;
static int hf_bgp_evpn_nlri_etag = -1;
static int hf_bgp_evpn_nlri_mpls_ls = -1;
static int hf_bgp_evpn_nlri_maclen = -1;
static int hf_bgp_evpn_nlri_mac_addr = -1;
static int hf_bgp_evpn_nlri_iplen = -1;
static int hf_bgp_evpn_nlri_prefix_len = -1;
static int hf_bgp_evpn_nlri_ip_addr = -1;
static int hf_bgp_evpn_nlri_ipv6_addr = -1;
static int hf_bgp_evpn_nlri_ipv4_gtw = -1;
static int hf_bgp_evpn_nlri_ipv6_gtw = -1;

/* BGP update tunnel encaps attribute RFC 5512 */

static int hf_bgp_update_encaps_tunnel_tlv_len = -1;
static int hf_bgp_update_encaps_tunnel_tlv_type = -1;
static int hf_bgp_update_encaps_tunnel_subtlv_len = -1;
static int hf_bgp_update_encaps_tunnel_subtlv_type = -1;
static int hf_bgp_update_encaps_tunnel_subtlv_session_id = -1;
static int hf_bgp_update_encaps_tunnel_subtlv_cookie = -1;
static int hf_bgp_update_encaps_tunnel_subtlv_gre_key = -1;
static int hf_bgp_update_encaps_tunnel_subtlv_color_value = -1;
static int hf_bgp_update_encaps_tunnel_subtlv_lb_block_length = -1;

/* RFC 6514 PMSI Tunnel Attribute */
static int hf_bgp_pmsi_tunnel_flags = -1;
static int hf_bgp_pmsi_tunnel_type = -1;
static int hf_bgp_pmsi_tunnel_id = -1;
static int hf_bgp_pmsi_tunnel_not_present = -1;
static int hf_bgp_pmsi_tunnel_rsvp_p2mp_id = -1; /* RFC4875 section 19 */
static int hf_bgp_pmsi_tunnel_rsvp_p2mp_tunnel_id = -1;
static int hf_bgp_pmsi_tunnel_rsvp_p2mp_ext_tunnel_idv4 = -1;
static int hf_bgp_pmsi_tunnel_mldp_fec_el_type = -1; /* RFC 6388 section 2.3 */
static int hf_bgp_pmsi_tunnel_mldp_fec_el_afi = -1;
static int hf_bgp_pmsi_tunnel_mldp_fec_el_adr_len = -1;
static int hf_bgp_pmsi_tunnel_mldp_fec_el_root_nodev4 = -1;
static int hf_bgp_pmsi_tunnel_mldp_fec_el_root_nodev6 = -1;
static int hf_bgp_pmsi_tunnel_mldp_fec_el_opa_len = -1;
static int hf_bgp_pmsi_tunnel_mldp_fec_el_opa_val_type = -1;
static int hf_bgp_pmsi_tunnel_mldp_fec_el_opa_val_len = -1;
static int hf_bgp_pmsi_tunnel_mldp_fec_el_opa_value_rn = -1;
static int hf_bgp_pmsi_tunnel_mldp_fec_el_opa_value_str = -1;
static int hf_bgp_pmsi_tunnel_mldp_fec_el_opa_val_ext_type = -1;
static int hf_bgp_pmsi_tunnel_mldp_fec_el_opa_val_ext_len = -1;
static int hf_bgp_pmsi_tunnel_pimsm_sender = -1;
static int hf_bgp_pmsi_tunnel_pimsm_pmc_group = -1;
static int hf_bgp_pmsi_tunnel_pimssm_root_node = -1;
static int hf_bgp_pmsi_tunnel_pimssm_pmc_group = -1;
static int hf_bgp_pmsi_tunnel_pimbidir_sender = -1;
static int hf_bgp_pmsi_tunnel_pimbidir_pmc_group = -1;
static int hf_bgp_pmsi_tunnel_ingress_rep_addr = -1;

/* draft-ietf-idr-aigp-18 attribute */
static int hf_bgp_aigp_type = -1;
static int hf_bgp_aigp_tlv_length = -1;
static int hf_bgp_aigp_accu_igp_metric = -1;


/* MPLS labels decoding */
static int hf_bgp_update_mpls_label = -1;
static int hf_bgp_update_mpls_label_value = -1;
static int hf_bgp_update_mpls_label_value_20bits = -1;

/* BGP update path attribute SSA SAFI Specific attribute (deprecated should we keep it ?) */

static int hf_bgp_ssa_t = -1;
static int hf_bgp_ssa_type = -1;
static int hf_bgp_ssa_len = -1;
static int hf_bgp_ssa_value = -1;
static int hf_bgp_ssa_l2tpv3_pref = -1;
static int hf_bgp_ssa_l2tpv3_s = -1;
static int hf_bgp_ssa_l2tpv3_unused = -1;
static int hf_bgp_ssa_l2tpv3_cookie_len = -1;
static int hf_bgp_ssa_l2tpv3_session_id = -1;
static int hf_bgp_ssa_l2tpv3_cookie = -1;

/* BGP NLRI head field */
static int hf_bgp_update_nlri = -1;

static int hf_bgp_mp_reach_nlri_ipv4_prefix = -1;
static int hf_bgp_mp_unreach_nlri_ipv4_prefix = -1;
static int hf_bgp_mp_reach_nlri_ipv6_prefix = -1;
static int hf_bgp_mp_unreach_nlri_ipv6_prefix = -1;
static int hf_bgp_mp_nlri_tnl_id = -1;
static int hf_bgp_withdrawn_prefix = -1;
static int hf_bgp_nlri_prefix = -1;
static int hf_bgp_nlri_path_id = -1;

/* BGP mcast IP VPN nlri header field */

static int hf_bgp_mcast_vpn_nlri_t = -1;
static int hf_bgp_mcast_vpn_nlri_route_type = -1;
static int hf_bgp_mcast_vpn_nlri_length = -1;
static int hf_bgp_mcast_vpn_nlri_rd = -1;
static int hf_bgp_mcast_vpn_nlri_origin_router_ipv4 = -1;
static int hf_bgp_mcast_vpn_nlri_origin_router_ipv6 = -1;
static int hf_bgp_mcast_vpn_nlri_source_as = -1;
static int hf_bgp_mcast_vpn_nlri_source_length = -1;
static int hf_bgp_mcast_vpn_nlri_group_length = -1;
static int hf_bgp_mcast_vpn_nlri_source_addr_ipv4 = -1;
static int hf_bgp_mcast_vpn_nlri_source_addr_ipv6 = -1;
static int hf_bgp_mcast_vpn_nlri_group_addr_ipv4 = -1;
static int hf_bgp_mcast_vpn_nlri_group_addr_ipv6 = -1;
static int hf_bgp_mcast_vpn_nlri_route_key = -1;

/* BGP-LS */

static int hf_bgp_ls_type = -1;
static int hf_bgp_ls_length = -1;

static int hf_bgp_ls_safi72_nlri = -1;
static int hf_bgp_ls_safi128_nlri = -1;
static int hf_bgp_ls_safi128_nlri_route_distinguisher = -1;
static int hf_bgp_ls_safi128_nlri_route_distinguisher_type = -1;
static int hf_bgp_ls_safi128_nlri_route_dist_admin_asnum_2 = -1;
static int hf_bgp_ls_safi128_nlri_route_dist_admin_ipv4 = -1;
static int hf_bgp_ls_safi128_nlri_route_dist_admin_asnum_4 = -1;
static int hf_bgp_ls_safi128_nlri_route_dist_asnum_2 = -1;
static int hf_bgp_ls_safi128_nlri_route_dist_asnum_4 = -1;
static int hf_bgp_ls_nlri_type = -1;
static int hf_bgp_ls_nlri_length = -1;
static int hf_bgp_ls_nlri_link_nlri_type = -1;
static int hf_bgp_ls_nlri_link_descriptors_tlv = -1;
static int hf_bgp_ls_nlri_prefix_descriptors_tlv = -1;
static int hf_bgp_ls_nlri_link_local_identifier = -1;
static int hf_bgp_ls_nlri_link_remote_identifier = -1;
static int hf_bgp_ls_nlri_ipv4_interface_address = -1;
static int hf_bgp_ls_nlri_ipv4_neighbor_address = -1;
static int hf_bgp_ls_nlri_ipv6_interface_address = -1;
static int hf_bgp_ls_nlri_ipv6_neighbor_address = -1;
static int hf_bgp_ls_nlri_multi_topology_id = -1;
static int hf_bgp_ls_nlri_ospf_route_type = -1;
static int hf_bgp_ls_nlri_ip_reachability_prefix_ip = -1;
static int hf_bgp_ls_nlri_node_nlri_type = -1;
static int hf_bgp_ls_nlri_node_protocol_id = -1;
static int hf_bgp_ls_nlri_node_identifier = -1;
static int hf_bgp_ls_ipv4_topology_prefix_nlri_type = -1;
static int hf_bgp_ls_ipv6_topology_prefix_nlri_type = -1;

/* BGP-LS + SR */
static int hf_bgp_ls_sr_tlv_capabilities = -1;
static int hf_bgp_ls_sr_tlv_capabilities_range_size = -1;
static int hf_bgp_ls_sr_tlv_capabilities_flags = -1;
static int hf_bgp_ls_sr_tlv_capabilities_flags_i = -1;
static int hf_bgp_ls_sr_tlv_capabilities_flags_v = -1;
static int hf_bgp_ls_sr_tlv_capabilities_flags_h = -1;
static int hf_bgp_ls_sr_tlv_capabilities_flags_reserved = -1;
static int hf_bgp_ls_sr_tlv_capabilities_sid_label = -1;
static int hf_bgp_ls_sr_tlv_capabilities_sid_index = -1;
static int hf_bgp_ls_sr_tlv_algorithm = -1;
static int hf_bgp_ls_sr_tlv_algorithm_value = -1;
static int hf_bgp_ls_sr_tlv_prefix_sid = -1;
static int hf_bgp_ls_sr_tlv_prefix_sid_flags = -1;
static int hf_bgp_ls_sr_tlv_prefix_sid_flags_r = -1;
static int hf_bgp_ls_sr_tlv_prefix_sid_flags_n = -1;
static int hf_bgp_ls_sr_tlv_prefix_sid_flags_np = -1;
static int hf_bgp_ls_sr_tlv_prefix_sid_flags_p = -1;
static int hf_bgp_ls_sr_tlv_prefix_sid_flags_m = -1;
static int hf_bgp_ls_sr_tlv_prefix_sid_flags_e = -1;
static int hf_bgp_ls_sr_tlv_prefix_sid_flags_v = -1;
static int hf_bgp_ls_sr_tlv_prefix_sid_flags_l = -1;
static int hf_bgp_ls_sr_tlv_prefix_sid_algo = -1;
static int hf_bgp_ls_sr_tlv_prefix_sid_label = -1;
static int hf_bgp_ls_sr_tlv_prefix_sid_index = -1;
static int hf_bgp_ls_sr_tlv_adjacency_sid = -1;
static int hf_bgp_ls_sr_tlv_adjacency_sid_flags = -1;
static int hf_bgp_ls_sr_tlv_adjacency_sid_flags_fi = -1;
static int hf_bgp_ls_sr_tlv_adjacency_sid_flags_bi = -1;
static int hf_bgp_ls_sr_tlv_adjacency_sid_flags_bo = -1;
static int hf_bgp_ls_sr_tlv_adjacency_sid_flags_vi = -1;
static int hf_bgp_ls_sr_tlv_adjacency_sid_flags_vo = -1;
static int hf_bgp_ls_sr_tlv_adjacency_sid_flags_li = -1;
static int hf_bgp_ls_sr_tlv_adjacency_sid_flags_lo = -1;
static int hf_bgp_ls_sr_tlv_adjacency_sid_flags_si = -1;
static int hf_bgp_ls_sr_tlv_adjacency_sid_flags_so = -1;
static int hf_bgp_ls_sr_tlv_adjacency_sid_weight = -1;
static int hf_bgp_ls_sr_tlv_adjacency_sid_label = -1;
static int hf_bgp_ls_sr_tlv_adjacency_sid_index = -1;

/* draft-ietf-idr-ls-distribution-03 TLVs */
static int hf_bgp_ls_tlv_local_node_descriptors = -1;              /* 256 */
static int hf_bgp_ls_tlv_remote_node_descriptors = -1;             /* 257 */
static int hf_bgp_ls_tlv_link_local_remote_identifiers = -1;       /* 258 */
static int hf_bgp_ls_tlv_ipv4_interface_address = -1;              /* 259 */
static int hf_bgp_ls_tlv_ipv4_neighbor_address = -1;               /* 260 */
static int hf_bgp_ls_tlv_ipv6_interface_address = -1;              /* 261 */
static int hf_bgp_ls_tlv_ipv6_neighbor_address = -1;               /* 262 */
static int hf_bgp_ls_tlv_multi_topology_id = -1;                   /* 263 */
static int hf_bgp_ls_tlv_ospf_route_type = -1;                     /* 264 */
static int hf_bgp_ls_tlv_ip_reachability_information = -1;         /* 265 */

static int hf_bgp_ls_tlv_autonomous_system = -1;                   /* 512 */
static int hf_bgp_ls_tlv_autonomous_system_id = -1;
static int hf_bgp_ls_tlv_bgp_ls_identifier = -1;                   /* 513 */
static int hf_bgp_ls_tlv_bgp_ls_identifier_id = -1;
static int hf_bgp_ls_tlv_area_id = -1;                             /* 514 */
static int hf_bgp_ls_tlv_area_id_id = -1;
static int hf_bgp_ls_tlv_igp_router = -1;                          /* 515 */
static int hf_bgp_ls_tlv_igp_router_id = -1;

static int hf_bgp_ls_tlv_node_flags_bits = -1;                     /* 1024 */
static int hf_bgp_ls_tlv_opaque_node_properties = -1;              /* 1025 */
static int hf_bgp_ls_tlv_opaque_node_properties_value = -1;
static int hf_bgp_ls_tlv_node_name = -1;                           /* 1026 */
static int hf_bgp_ls_tlv_node_name_value = -1;
static int hf_bgp_ls_tlv_is_is_area_identifier = -1;               /* 1027 */
static int hf_bgp_ls_tlv_is_is_area_identifier_value = -1;
static int hf_bgp_ls_tlv_ipv4_router_id_of_local_node = -1;        /* 1028 */
static int hf_bgp_ls_tlv_ipv4_router_id_value = -1;
static int hf_bgp_ls_tlv_ipv6_router_id_value = -1;
static int hf_bgp_ls_tlv_ipv6_router_id_of_local_node = -1;        /* 1029 */
static int hf_bgp_ls_tlv_ipv4_router_id_of_remote_node = -1;       /* 1030 */
static int hf_bgp_ls_tlv_ipv6_router_id_of_remote_node = -1;       /* 1031 */

static int hf_bgp_ls_tlv_administrative_group_color = -1;          /* 1088 */
static int hf_bgp_ls_tlv_administrative_group_color_value = -1;
static int hf_bgp_ls_tlv_administrative_group = -1;
static int hf_bgp_ls_tlv_max_link_bandwidth = -1;                  /* 1089 */
static int hf_bgp_ls_tlv_max_reservable_link_bandwidth = -1;       /* 1090 */
static int hf_bgp_ls_tlv_unreserved_bandwidth = -1;                /* 1091 */
static int hf_bgp_ls_bandwidth_value = -1;
static int hf_bgp_ls_tlv_te_default_metric = -1;                   /* 1092 */
static int hf_bgp_ls_tlv_te_default_metric_value_old = -1;
static int hf_bgp_ls_tlv_te_default_metric_value = -1;
static int hf_bgp_ls_tlv_link_protection_type = -1;                /* 1093 */
static int hf_bgp_ls_tlv_link_protection_type_value = -1;
static int hf_bgp_ls_tlv_mpls_protocol_mask = -1;                  /* 1094 */
static int hf_bgp_ls_tlv_metric = -1;                              /* 1095 */
static int hf_bgp_ls_tlv_metric_value1 = -1;
static int hf_bgp_ls_tlv_metric_value2 = -1;
static int hf_bgp_ls_tlv_metric_value3 = -1;
static int hf_bgp_ls_tlv_shared_risk_link_group = -1;              /* 1096 */
static int hf_bgp_ls_tlv_shared_risk_link_group_value = -1;
static int hf_bgp_ls_tlv_opaque_link_attribute = -1;               /* 1097 */
static int hf_bgp_ls_tlv_opaque_link_attribute_value = -1;
static int hf_bgp_ls_tlv_link_name_attribute = -1;                 /* 1098 */
static int hf_bgp_ls_tlv_link_name_attribute_value = -1;

static int hf_bgp_ls_tlv_igp_flags = -1;                           /* 1152 */
static int hf_bgp_ls_tlv_route_tag = -1;                           /* 1153 */
static int hf_bgp_ls_tlv_route_tag_value = -1;
static int hf_bgp_ls_tlv_route_extended_tag = -1;                  /* 1154 */
static int hf_bgp_ls_tlv_route_extended_tag_value = -1;
static int hf_bgp_ls_tlv_prefix_metric = -1;                       /* 1155 */
static int hf_bgp_ls_tlv_prefix_metric_value = -1;
static int hf_bgp_ls_ospf_forwarding_address = -1;                 /* 1156 */
static int hf_bgp_ls_ospf_forwarding_address_ipv4_address = -1;
static int hf_bgp_ls_ospf_forwarding_address_ipv6_address = -1;
static int hf_bgp_ls_opaque_prefix_attribute = -1;                 /* 1157 */
static int hf_bgp_ls_opaque_prefix_attribute_value = -1;


/* Link Protection Types */
static int hf_bgp_ls_link_protection_type_extra_traffic = -1;
static int hf_bgp_ls_link_protection_type_unprotected = -1;
static int hf_bgp_ls_link_protection_type_shared = -1;
static int hf_bgp_ls_link_protection_type_dedicated_1to1 = -1;
static int hf_bgp_ls_link_protection_type_dedicated_1plus1 = -1;
static int hf_bgp_ls_link_protection_type_enhanced = -1;
/* MPLS Protocol Mask flags */
static int hf_bgp_ls_mpls_protocol_mask_flag_l = -1;
static int hf_bgp_ls_mpls_protocol_mask_flag_r = -1;
/* BGP-LS IGP Flags */
static int hf_bgp_ls_igp_flags_flag_d = -1;
/* Node Flag Bits TLV's flags */
static int hf_bgp_ls_node_flag_bits_overload = -1;
static int hf_bgp_ls_node_flag_bits_attached = -1;
static int hf_bgp_ls_node_flag_bits_external = -1;
static int hf_bgp_ls_node_flag_bits_abr = -1;

/* BGP flow spec nlri header field */

static int hf_bgp_flowspec_nlri_t = -1;
static int hf_bgp_flowspec_nlri_filter = -1;
static int hf_bgp_flowspec_nlri_filter_type = -1;
static int hf_bgp_flowspec_nlri_length = -1;
static int hf_bgp_flowspec_nlri_dst_pref_ipv4 = -1;
static int hf_bgp_flowspec_nlri_src_pref_ipv4 = -1;
static int hf_bgp_flowspec_nlri_op_flags = -1;
static int hf_bgp_flowspec_nlri_op_eol = -1;
static int hf_bgp_flowspec_nlri_op_and = -1;
static int hf_bgp_flowspec_nlri_op_val_len = -1;
static int hf_bgp_flowspec_nlri_op_un_bit4 = -1;
static int hf_bgp_flowspec_nlri_op_un_bit5 = -1;
static int hf_bgp_flowspec_nlri_op_lt = -1;
static int hf_bgp_flowspec_nlri_op_gt = -1;
static int hf_bgp_flowspec_nlri_op_eq = -1;
static int hf_bgp_flowspec_nlri_dec_val_8 = -1;
static int hf_bgp_flowspec_nlri_dec_val_16 = -1;
static int hf_bgp_flowspec_nlri_dec_val_32 = -1;
static int hf_bgp_flowspec_nlri_dec_val_64 = -1;
static int hf_bgp_flowspec_nlri_op_flg_not = -1;
static int hf_bgp_flowspec_nlri_op_flg_match = -1;
static int hf_bgp_flowspec_nlri_tcp_flags = -1;
static int hf_bgp_flowspec_nlri_tcp_flags_cwr = -1;
static int hf_bgp_flowspec_nlri_tcp_flags_ecn = -1;
static int hf_bgp_flowspec_nlri_tcp_flags_urg = -1;
static int hf_bgp_flowspec_nlri_tcp_flags_ack = -1;
static int hf_bgp_flowspec_nlri_tcp_flags_push = -1;
static int hf_bgp_flowspec_nlri_tcp_flags_reset = -1;
static int hf_bgp_flowspec_nlri_tcp_flags_syn = -1;
static int hf_bgp_flowspec_nlri_tcp_flags_fin = -1;
static int hf_bgp_flowspec_nlri_fflag = -1;
static int hf_bgp_flowspec_nlri_fflag_lf = -1;
static int hf_bgp_flowspec_nlri_fflag_ff = -1;
static int hf_bgp_flowspec_nlri_fflag_isf = -1;
static int hf_bgp_flowspec_nlri_fflag_df = -1;
static int hf_bgp_flowspec_nlri_dscp = -1;
static int hf_bgp_flowspec_nlri_src_ipv6_pref = -1;
static int hf_bgp_flowspec_nlri_dst_ipv6_pref = -1;
static int hf_bgp_flowspec_nlri_ipv6_pref_len = -1;
static int hf_bgp_flowspec_nlri_ipv6_pref_offset = -1;

/* BGP update safi ndt nlri  draft-nalawade-idr-mdt-safi-03 */

static int hf_bgp_mdt_nlri_safi_rd = -1;
static int hf_bgp_mdt_nlri_safi_ipv4_addr = -1;
static int hf_bgp_mdt_nlri_safi_group_addr = -1;

/* BGP update extended community header field */

static int hf_bgp_ext_communities = -1;
static int hf_bgp_ext_community = -1;

static int hf_bgp_ext_com_type_high = -1;
static int hf_bgp_ext_com_stype_low_unknown = -1;
static int hf_bgp_ext_com_stype_tr_evpn = -1;
static int hf_bgp_ext_com_stype_tr_as2 = -1;
static int hf_bgp_ext_com_stype_ntr_as2 = -1;
static int hf_bgp_ext_com_stype_tr_as4 = -1;
static int hf_bgp_ext_com_stype_ntr_as4 = -1;
static int hf_bgp_ext_com_stype_tr_IP4 = -1;
static int hf_bgp_ext_com_stype_tr_opaque = -1;
static int hf_bgp_ext_com_stype_ntr_opaque = -1;
static int hf_bgp_ext_com_tunnel_type = -1;
static int hf_bgp_ext_com_stype_tr_exp = -1;
static int hf_bgp_ext_com_stype_tr_exp_fs_ip4 = -1;
static int hf_bgp_ext_com_stype_tr_exp_fs_as4 = -1;

static int hf_bgp_ext_com_value_as2 = -1;
static int hf_bgp_ext_com_value_as4 = -1;
static int hf_bgp_ext_com_value_IP4 = -1;
static int hf_bgp_ext_com_value_an2 = -1;
static int hf_bgp_ext_com_value_an4 = -1;
static int hf_bgp_ext_com_value_unknown16 = -1;
static int hf_bgp_ext_com_value_unknown32 = -1;
static int hf_bgp_ext_com_value_link_bw = -1;
static int hf_bgp_ext_com_value_ospf_rtype = -1;
static int hf_bgp_ext_com_value_ospf_rtype_option = -1;
static int hf_bgp_ext_com_value_fs_remark = -1;

/* BGP QoS propagation draft-knoll-idr-qos-attribute */

static int hf_bgp_ext_com_qos_flags = -1;
static int hf_bgp_ext_com_qos_flags_remarking = -1;
static int hf_bgp_ext_com_qos_flags_ignore_remarking = -1;
static int hf_bgp_ext_com_qos_flags_agg_marking = -1;
static int hf_bgp_ext_com_cos_flags = -1;
static int hf_bgp_ext_com_cos_flags_be = -1;
static int hf_bgp_ext_com_cos_flags_ef = -1;
static int hf_bgp_ext_com_cos_flags_af = -1;
static int hf_bgp_ext_com_cos_flags_le = -1;
static int hf_bgp_ext_com_qos_set_number = -1;
static int hf_bgp_ext_com_qos_tech_type = -1;
static int hf_bgp_ext_com_qos_marking_o = -1;
static int hf_bgp_ext_com_qos_marking_a = -1;
static int hf_bgp_ext_com_qos_default_to_zero = -1;

/* BGP Flow spec extended community RFC 5575 */

static int hf_bgp_ext_com_flow_rate_float = -1;
static int hf_bgp_ext_com_flow_act_allset = -1;
static int hf_bgp_ext_com_flow_act_term_act = -1;
static int hf_bgp_ext_com_flow_act_samp_act = -1;

/* BGP L2 extended community RFC 4761, RFC 6624 */
/* draft-ietf-l2vpn-vpls-multihoming */

static int hf_bgp_ext_com_l2_encaps = -1;
static int hf_bgp_ext_com_l2_c_flags = -1;
static int hf_bgp_ext_com_l2_mtu = -1;
static int hf_bgp_ext_com_l2_flag_d = -1;
static int hf_bgp_ext_com_l2_flag_z1 = -1;
static int hf_bgp_ext_com_l2_flag_f = -1;
static int hf_bgp_ext_com_l2_flag_z345 = -1;
static int hf_bgp_ext_com_l2_flag_c = -1;
static int hf_bgp_ext_com_l2_flag_s = -1;
static int hf_bgp_ext_com_l2_esi_label_flag = -1;

static gint ett_bgp = -1;
static gint ett_bgp_prefix = -1;
static gint ett_bgp_unfeas = -1;
static gint ett_bgp_attrs = -1;
static gint ett_bgp_attr = -1;
static gint ett_bgp_attr_flags = -1;
static gint ett_bgp_mp_nhna = -1;
static gint ett_bgp_mp_reach_nlri = -1;
static gint ett_bgp_mp_unreach_nlri = -1;
static gint ett_bgp_mp_snpa = -1;
static gint ett_bgp_nlri = -1;
static gint ett_bgp_open = -1;
static gint ett_bgp_update = -1;
static gint ett_bgp_notification = -1;
static gint ett_bgp_route_refresh = -1; /* ROUTE-REFRESH message tree */
static gint ett_bgp_capability = -1;
static gint ett_bgp_as_path_segment = -1;
static gint ett_bgp_as_path_segment_asn = -1;
static gint ett_bgp_communities = -1;
static gint ett_bgp_community = -1;
static gint ett_bgp_cluster_list = -1;  /* cluster list tree          */
static gint ett_bgp_options = -1;       /* optional parameters tree   */
static gint ett_bgp_option = -1;        /* an optional parameter tree */
static gint ett_bgp_cap = -1;           /* an cap parameter tree */
static gint ett_bgp_extended_communities = -1; /* extended communities list tree */
static gint ett_bgp_extended_community = -1; /* extended comminiy tree for each community of BGP update */
static gint ett_bgp_extended_com_fspec_redir = -1; /* extended communities BGP flow act redirect */
static gint ett_bgp_ext_com_flags = -1; /* extended communities flags tree */
static gint ett_bgp_ext_com_l2_flags = -1; /* extended commuties tree for l2 services flags */
static gint ett_bgp_ssa = -1;           /* safi specific attribute */
static gint ett_bgp_ssa_subtree = -1;   /* safi specific attribute Subtrees */
static gint ett_bgp_orf = -1;           /* orf (outbound route filter) tree */
static gint ett_bgp_orf_entry = -1;     /* orf entry tree */
static gint ett_bgp_mcast_vpn_nlri = -1;
static gint ett_bgp_flow_spec_nlri = -1;
static gint ett_bgp_flow_spec_nlri_filter = -1; /* tree decoding multiple op and value pairs */
static gint ett_bgp_flow_spec_nlri_op_flags = -1; /* tree decoding each op and val pair within the op and value set */
static gint ett_bgp_flow_spec_nlri_tcp = -1;
static gint ett_bgp_flow_spec_nlri_ff = -1;
static gint ett_bgp_tunnel_tlv = -1;
static gint ett_bgp_tunnel_tlv_subtree = -1;
static gint ett_bgp_tunnel_subtlv = -1;
static gint ett_bgp_tunnel_subtlv_subtree = -1;
static gint ett_bgp_link_state = -1;
static gint ett_bgp_evpn_nlri = -1;
static gint ett_bgp_evpn_nlri_esi = -1;
static gint ett_bgp_mpls_labels = -1;
static gint ett_bgp_pmsi_tunnel_id = -1;
static gint ett_bgp_aigp_attr = -1;

static expert_field ei_bgp_cap_len_bad = EI_INIT;
static expert_field ei_bgp_cap_gr_helper_mode_only = EI_INIT;
static expert_field ei_bgp_notify_minor_unknown = EI_INIT;
static expert_field ei_bgp_route_refresh_orf_type_unknown = EI_INIT;
static expert_field ei_bgp_length_invalid = EI_INIT;
static expert_field ei_bgp_prefix_length_invalid = EI_INIT;
static expert_field ei_bgp_afi_type_not_supported = EI_INIT;
static expert_field ei_bgp_unknown_afi = EI_INIT;
static expert_field ei_bgp_unknown_safi = EI_INIT;
static expert_field ei_bgp_unknown_label_vpn = EI_INIT;
static expert_field ei_bgp_ls_error = EI_INIT;
static expert_field ei_bgp_ls_warn = EI_INIT;
static expert_field ei_bgp_ext_com_len_bad = EI_INIT;
static expert_field ei_bgp_attr_pmsi_opaque_type = EI_INIT;
static expert_field ei_bgp_attr_pmsi_tunnel_type = EI_INIT;
static expert_field ei_bgp_prefix_length_err = EI_INIT;
static expert_field ei_bgp_attr_aigp_type = EI_INIT;
static expert_field ei_bgp_attr_as_path_as_len_err = EI_INIT;

static expert_field ei_bgp_evpn_nlri_rt4_no_ip = EI_INIT;
static expert_field ei_bgp_evpn_nlri_rt4_len_err = EI_INIT;
static expert_field ei_bgp_evpn_nlri_rt_type_err = EI_INIT;
static expert_field ei_bgp_evpn_nlri_esi_type_err = EI_INIT;
/* desegmentation */
static gboolean bgp_desegment = TRUE;

static gint bgp_asn_len = 0;

/* FF: BGP-LS is just a collector of IGP link state information. Some
   fields are encoded "as-is" from the IGP, hence in order to dissect
   them properly we must be aware of their origin, e.g. IS-IS or OSPF.
   So, *before* dissecting LINK_STATE attributes we must get the
   'Protocol-ID' field that is present in the MP_[UN]REACH_NLRI
   attribute. The tricky thing is that there is no strict order
   for path attributes on the wire, hence we have to keep track
   of 1) the 'Protocol-ID' from the MP_[UN]REACH_NLRI and 2)
   the offset/len of the LINK_STATE attribute. We store them in
   per-packet proto_data and once we got both we are ready for the
   LINK_STATE attribute dissection.
*/
typedef struct _link_state_data {
    /* Link/Node NLRI Protocol-ID (e.g. OSPF or IS-IS) */
    guint8 protocol_id;
    /* LINK_STATE attribute coordinates */
    gint ostart;  /* offset at which the LINK_STATE path attribute starts */
    gint oend;    /* offset at which the LINK_STATE path attribute ends */
    guint16 tlen; /* length of the LINK_STATE path attribute */
    /* presence flag */
    gboolean link_state_attr_present;
    /* tree where add LINK_STATE items */
    proto_tree *subtree2;
} link_state_data;

#define LINK_STATE_DATA_KEY 0

static void
save_link_state_protocol_id(packet_info *pinfo, guint8 protocol_id) {
    link_state_data *data =
        (link_state_data*)p_get_proto_data(pinfo->pool, pinfo, proto_bgp, LINK_STATE_DATA_KEY);
    if (!data) {
        data = wmem_new0(pinfo->pool, link_state_data);
        data->ostart = -1;
        data->oend = -1;
        data->tlen = 0;
        data->link_state_attr_present = FALSE;
        data->subtree2 = NULL;
    }
    data->protocol_id = protocol_id;
    p_add_proto_data(pinfo->pool, pinfo, proto_bgp, LINK_STATE_DATA_KEY, data);
    return;
}

static void
save_link_state_attr_position(packet_info *pinfo, gint ostart, gint oend, guint16 tlen, proto_tree *subtree2) {
    link_state_data *data =
        (link_state_data*)p_get_proto_data(pinfo->pool, pinfo, proto_bgp, LINK_STATE_DATA_KEY);
    if (!data) {
        data = wmem_new0(pinfo->pool, link_state_data);
        data->protocol_id = BGP_LS_NLRI_PROTO_ID_UNKNOWN;
    }
    data->ostart = ostart;
    data->oend = oend;
    data->tlen = tlen;
    data->link_state_attr_present = TRUE;
    data->subtree2 = subtree2;
    p_add_proto_data(pinfo->pool, pinfo, proto_bgp, LINK_STATE_DATA_KEY, data);
    return;
}

static link_state_data*
load_link_state_data(packet_info *pinfo) {
    link_state_data *data =
        (link_state_data*)p_get_proto_data(pinfo->pool, pinfo, proto_bgp, LINK_STATE_DATA_KEY);
    return data;
}

/*
 * Detect IPv4 prefixes  conform to BGP Additional Path but NOT conform to standard BGP
 *
 * A real BGP speaker would rely on the BGP Additional Path in the BGP Open messages.
 * But it is not suitable for a packet analyse because the BGP sessions are not supposed to
 * restart very often, and Open messages from both sides of the session would be needed
 * to determine the result of the capability negociation.
 * Code inspired from the decode_prefix4 function
 */
static int
detect_add_path_prefix4(tvbuff_t *tvb, gint offset, gint end) {
    guint32 addr_len;
    guint8 prefix_len;
    gint o;
    /* Must be compatible with BGP Additional Path  */
    for (o = offset + 4; o < end; o += 4) {
        prefix_len = tvb_get_guint8(tvb, o);
        if( prefix_len > 32) {
            return 0; /* invalid prefix length - not BGP add-path */
        }
        addr_len = (prefix_len + 7) / 8;
        o += 1 + addr_len;
        if( o > end ) {
            return 0; /* invalid offset - not BGP add-path */
        }
        if (prefix_len % 8) {
            /* detect bits set after the end of the prefix */
            if( tvb_get_guint8(tvb, o - 1 )  & (0xFF >> (prefix_len % 8)) ) {
                return 0; /* invalid prefix content - not BGP add-path */
            }
        }
    }
    /* Must NOT be compatible with standard BGP */
    for (o = offset; o < end; ) {
        prefix_len = tvb_get_guint8(tvb, o);
        if( prefix_len == 0 && end - offset > 1 ) {
            return 1; /* prefix length is zero (i.e. matching all IP prefixes) and remaining bytes within the NLRI is greater than or equal to 1 - may be BGP add-path */
        }
        if( prefix_len > 32) {
            return 1; /* invalid prefix length - may be BGP add-path */
        }
        addr_len = (prefix_len + 7) / 8;
        o += 1 + addr_len;
        if( o > end ) {
            return 1; /* invalid offset - may be BGP add-path */
        }
        if (prefix_len % 8) {
            /* detect bits set after the end of the prefix */
            if( tvb_get_guint8(tvb, o - 1 ) & (0xFF >> (prefix_len % 8)) ) {
                return 1; /* invalid prefix content - may be BGP add-path (or a bug) */
            }
        }
    }
    return 0; /* valid - do not assume Additional Path */
}
/*
 * Decode an IPv4 prefix with Path Identifier
 * Code inspired from the decode_prefix4 function
 */
static int
decode_path_prefix4(proto_tree *tree, packet_info *pinfo, int hf_path_id, int hf_addr, tvbuff_t *tvb, gint offset,
                    const char *tag)
{
    proto_tree *prefix_tree;
    union {
       guint8 addr_bytes[4];
       guint32 addr;
    } ip_addr;        /* IP address                         */
    guint8 plen;      /* prefix length                      */
    int    length;    /* number of octets needed for prefix */
    guint32 path_identifier;
    address addr;

    /* snarf path identifier length and prefix */
    path_identifier = tvb_get_ntohl(tvb, offset);
    plen = tvb_get_guint8(tvb, offset + 4);
    length = tvb_get_ipv4_addr_with_prefix_len(tvb, offset + 4 + 1, ip_addr.addr_bytes, plen);
    if (length < 0) {
        proto_tree_add_expert_format(tree, pinfo, &ei_bgp_length_invalid, tvb, offset + 4 , 1, "%s length %u invalid (> 32)",
            tag, plen);
        return -1;
    }
    /* put prefix into protocol tree */
    set_address(&addr, AT_IPv4, 4, ip_addr.addr_bytes);
    prefix_tree = proto_tree_add_subtree_format(tree, tvb, offset,  4 + 1 + length,
                            ett_bgp_prefix, NULL, "%s/%u PathId %u ",
                            address_to_str(wmem_packet_scope(), &addr), plen, path_identifier);
    proto_tree_add_item(prefix_tree, hf_path_id, tvb, offset, 4, ENC_BIG_ENDIAN);
    proto_tree_add_item(prefix_tree, hf_bgp_prefix_length, tvb, offset + 4, 1, ENC_BIG_ENDIAN);
    proto_tree_add_ipv4(prefix_tree, hf_addr, tvb, offset + 4 + 1, length, ip_addr.addr);
    return(4 + 1 + length);
}

/*
 * Decode an IPv4 prefix.
 */
static int
decode_prefix4(proto_tree *tree, packet_info *pinfo, proto_item *parent_item, int hf_addr, tvbuff_t *tvb, gint offset,
               guint16 tlen, const char *tag)
{
    proto_tree *prefix_tree;
    union {
       guint8 addr_bytes[4];
       guint32 addr;
    } ip_addr;        /* IP address                         */
    guint8 plen;      /* prefix length                      */
    int    length;    /* number of octets needed for prefix */
    address addr;

    /* snarf length and prefix */
    plen = tvb_get_guint8(tvb, offset);
    length = tvb_get_ipv4_addr_with_prefix_len(tvb, offset + 1, ip_addr.addr_bytes, plen);
    if (length < 0) {
        proto_tree_add_expert_format(tree, pinfo, &ei_bgp_length_invalid, tvb, offset, 1, "%s length %u invalid (> 32)",
            tag, plen);
        return -1;
    }

    /* put prefix into protocol tree */
    set_address(&addr, AT_IPv4, 4, ip_addr.addr_bytes);
    prefix_tree = proto_tree_add_subtree_format(tree, tvb, offset,
            tlen != 0 ? tlen : 1 + length, ett_bgp_prefix, NULL,
            "%s/%u", address_to_str(wmem_packet_scope(), &addr), plen);

    proto_item_append_text(parent_item, " (%s/%u)",
                             address_to_str(wmem_packet_scope(), &addr), plen);

    proto_tree_add_uint_format(prefix_tree, hf_bgp_prefix_length, tvb, offset, 1, plen, "%s prefix length: %u",
        tag, plen);
    proto_tree_add_ipv4(prefix_tree, hf_addr, tvb, offset + 1, length,
            ip_addr.addr);
    return(1 + length);
}

/*
 * Decode an IPv6 prefix.
 */
static int
decode_prefix6(proto_tree *tree, packet_info *pinfo, int hf_addr, tvbuff_t *tvb, gint offset,
               guint16 tlen, const char *tag)
{
    proto_tree          *prefix_tree;
    struct e_in6_addr   addr;     /* IPv6 address                       */
    address             addr_str;
    int                 plen;     /* prefix length                      */
    int                 length;   /* number of octets needed for prefix */

    /* snarf length and prefix */
    plen = tvb_get_guint8(tvb, offset);
    length = tvb_get_ipv6_addr_with_prefix_len(tvb, offset + 1, &addr, plen);
    if (length < 0) {
        proto_tree_add_expert_format(tree, pinfo, &ei_bgp_length_invalid, tvb, offset, 1, "%s length %u invalid",
            tag, plen);
        return -1;
    }

    /* put prefix into protocol tree */
    set_address(&addr_str, AT_IPv6, 16, addr.bytes);
    prefix_tree = proto_tree_add_subtree_format(tree, tvb, offset,
            tlen != 0 ? tlen : 1 + length, ett_bgp_prefix, NULL, "%s/%u",
            address_to_str(wmem_packet_scope(), &addr_str), plen);
    proto_tree_add_uint_format(prefix_tree, hf_bgp_prefix_length, tvb, offset, 1, plen, "%s prefix length: %u",
        tag, plen);
    proto_tree_add_ipv6(prefix_tree, hf_addr, tvb, offset + 1, length, &addr);
    return(1 + length);
}

static int
decode_fspec_match_prefix6(proto_tree *tree, proto_item *parent_item, int hf_addr,
                           tvbuff_t *tvb, gint offset, guint16 tlen, packet_info *pinfo)
{
    proto_tree        *prefix_tree;
    struct e_in6_addr addr;     /* IPv6 address                       */
    address           addr_str;
    int               plen;     /* prefix length                      */
    int               length;   /* number of octets needed for prefix */
    int               poffset_place = 1;
    int               plength_place = 0;

    /* snarf length and prefix */
    plen = tvb_get_guint8(tvb, offset);
    if (plen == 0) /* I should be facing a draft 04 version where the prefix offset is switched with length */
    {
      plen =  tvb_get_guint8(tvb, offset+1);
      poffset_place = 0;
      plength_place = 1;
    }
    length = tvb_get_ipv6_addr_with_prefix_len(tvb, offset + 2, &addr, plen);
    if (length < 0) {
        expert_add_info_format(pinfo, parent_item, &ei_bgp_prefix_length_err, "Length is invalid %u", plen);
        return -1;
    }

    /* put prefix into protocol tree */
    set_address(&addr_str, AT_IPv6, 16, addr.bytes);
    prefix_tree = proto_tree_add_subtree_format(tree, tvb, offset,
            tlen != 0 ? tlen : 1 + length, ett_bgp_prefix, NULL, "%s/%u",
            address_to_str(wmem_packet_scope(), &addr_str), plen);
    proto_tree_add_item(prefix_tree, hf_bgp_flowspec_nlri_ipv6_pref_len, tvb, offset + plength_place, 1, ENC_BIG_ENDIAN);
    proto_tree_add_item(prefix_tree, hf_bgp_flowspec_nlri_ipv6_pref_offset, tvb, offset + poffset_place, 1, ENC_BIG_ENDIAN);
    proto_tree_add_ipv6(prefix_tree, hf_addr, tvb, offset + 2, length, &addr);
    if (parent_item != NULL)
      proto_item_append_text(parent_item, " (%s/%u)",
                             address_to_str(wmem_packet_scope(), &addr_str), plen);
    return(2 + length);
}

const char*
decode_bgp_rd(tvbuff_t *tvb, gint offset)
{
    guint16 rd_type;
    wmem_strbuf_t *strbuf;

    rd_type = tvb_get_ntohs(tvb,offset);
    strbuf = wmem_strbuf_new_label(wmem_packet_scope());

    switch (rd_type) {
        case FORMAT_AS2_LOC:
            wmem_strbuf_append_printf(strbuf, "%u:%u", tvb_get_ntohs(tvb, offset + 2),
                                      tvb_get_ntohl(tvb, offset + 4));
            break;
        case FORMAT_IP_LOC:
            wmem_strbuf_append_printf(strbuf, "%s:%u", tvb_ip_to_str(tvb, offset + 2),
                                      tvb_get_ntohs(tvb, offset + 6));
            break ;
        case FORMAT_AS4_LOC:
            wmem_strbuf_append_printf(strbuf, "%u:%u", tvb_get_ntohl(tvb, offset + 2),
                                      tvb_get_ntohs(tvb, offset + 6));
            break ;
        default:
            wmem_strbuf_append_printf(strbuf, "Unknown (0x%04x) RD type",rd_type);
            break;
    } /* switch (rd_type) */

    return wmem_strbuf_get_str(strbuf);
}

static int
decode_mcast_vpn_nlri_addresses(proto_tree *tree, tvbuff_t *tvb,
                                gint offset)
{
    guint8 addr_len;

    /* Multicast Source Address */
    proto_tree_add_item(tree, hf_bgp_mcast_vpn_nlri_source_length, tvb, offset,
                        1, ENC_BIG_ENDIAN);
    addr_len = tvb_get_guint8(tvb, offset);
    if (addr_len != 32 && addr_len != 128)
        return -1;
    offset++;
    if (addr_len == 32) {
        proto_tree_add_item(tree, hf_bgp_mcast_vpn_nlri_source_addr_ipv4, tvb,
                            offset, 4, ENC_BIG_ENDIAN);
        offset += 4;
    } else {
        proto_tree_add_item(tree, hf_bgp_mcast_vpn_nlri_source_addr_ipv6, tvb,
                            offset, 16, ENC_NA);
        offset += 16;
    }

    /* Multicast Group Address */
    proto_tree_add_item(tree, hf_bgp_mcast_vpn_nlri_group_length, tvb, offset,
                        1, ENC_BIG_ENDIAN);
    addr_len = tvb_get_guint8(tvb, offset);
    if (addr_len != 32 && addr_len != 128)
        return -1;
    offset++;
    if (addr_len == 32) {
        proto_tree_add_item(tree, hf_bgp_mcast_vpn_nlri_group_addr_ipv4, tvb,
                            offset, 4, ENC_BIG_ENDIAN);
        offset += 4;
    } else {
        proto_tree_add_item(tree, hf_bgp_mcast_vpn_nlri_group_addr_ipv6, tvb,
                            offset, 16, ENC_NA);
        offset += 16;
    }

    return offset;
}

/*
 * function to decode operator in BGP flow spec NLRI when it address decimal values (TCP ports, UDP ports, ports, ...)
 */

static void
decode_bgp_flow_spec_dec_operator(proto_tree *tree, tvbuff_t *tvb, gint offset)
{
    static const int * flags[] = {
        &hf_bgp_flowspec_nlri_op_eol,
        &hf_bgp_flowspec_nlri_op_and,
        &hf_bgp_flowspec_nlri_op_val_len,
        &hf_bgp_flowspec_nlri_op_un_bit4,
        &hf_bgp_flowspec_nlri_op_lt,
        &hf_bgp_flowspec_nlri_op_gt,
        &hf_bgp_flowspec_nlri_op_eq,
        NULL
    };

    proto_tree_add_bitmask(tree, tvb, offset, hf_bgp_flowspec_nlri_op_flags, ett_bgp_flow_spec_nlri_op_flags, flags, ENC_NA);
}

/*
 * Decode an operator and decimal values of BGP flow spec NLRI
 */
static int
decode_bgp_nlri_op_dec_value(proto_tree *parent_tree, proto_item *parent_item, tvbuff_t *tvb, gint offset)
{
    guint8 nlri_operator;
    guint cursor_op_val=0;
    guint8 value_len=0;
    guint value=0;
    guint8 shift_amount=0;
    guint first_loop=0;

    proto_item_append_text(parent_item," (");

    do {
        nlri_operator = tvb_get_guint8(tvb, offset+cursor_op_val);
        shift_amount = nlri_operator&0x30;
        shift_amount = shift_amount >> 4;
        value_len = 1 << shift_amount; /* as written in RFC 5575 section 4 */
        /* call to a operator decode function */
        decode_bgp_flow_spec_dec_operator(parent_tree, tvb, offset+cursor_op_val);
        if (first_loop == 0)
        {
            /* If first operator we remoe a white space and or (||) is not relevant */
            /* BGP flow spec NLRI operator bitmask */
            proto_item_append_text(parent_item,"%s%s%s%s",
                 ((nlri_operator & BGPNLRI_FSPEC_AND_BIT) == 0) ? "" : "&& ",
                 ((nlri_operator & BGPNLRI_FSPEC_GREATER_THAN) == 0) ? "" : ">",
                 ((nlri_operator & BGPNLRI_FSPEC_LESS_THAN) == 0) ? "" : "<",
                 ((nlri_operator & BGPNLRI_FSPEC_EQUAL) == 0) ? "" : "=");
            first_loop = 1;
        }
        else
        {
            proto_item_append_text(parent_item," %s%s%s%s",
                 ((nlri_operator & BGPNLRI_FSPEC_AND_BIT) == 0) ? "|| " : "&& ",
                 ((nlri_operator & BGPNLRI_FSPEC_GREATER_THAN) == 0) ? "" : ">",
                 ((nlri_operator & BGPNLRI_FSPEC_LESS_THAN) == 0) ? "" : "<",
                 ((nlri_operator & BGPNLRI_FSPEC_EQUAL) == 0) ? "" : "=");
        }
        cursor_op_val++;  /* we manage this operator we move to the value */
        switch (value_len) {
            case 1:
                proto_tree_add_item(parent_tree, hf_bgp_flowspec_nlri_dec_val_8, tvb, offset+cursor_op_val, 1,ENC_BIG_ENDIAN);
                value = tvb_get_guint8(tvb,offset+cursor_op_val);
                break;
            case 2:
                proto_tree_add_item(parent_tree, hf_bgp_flowspec_nlri_dec_val_16, tvb, offset+cursor_op_val, 2,ENC_BIG_ENDIAN);
                value = tvb_get_ntohs(tvb,offset+cursor_op_val);
                break;
            case 3:
                proto_tree_add_item(parent_tree, hf_bgp_flowspec_nlri_dec_val_32, tvb, offset+cursor_op_val, 4, ENC_BIG_ENDIAN);
                value = tvb_get_ntohl(tvb,offset+cursor_op_val);
                break;
            case 4:
                proto_tree_add_item(parent_tree, hf_bgp_flowspec_nlri_dec_val_64, tvb, offset+cursor_op_val, 8, ENC_BIG_ENDIAN);
                break;
            default:
                return -1;
        }
        cursor_op_val = cursor_op_val + value_len;
        proto_item_append_text(parent_item,"%u", value);
    } while ((nlri_operator&BGPNLRI_FSPEC_END_OF_LST) == 0);
    proto_item_append_text(parent_item,")");
    return (cursor_op_val);
}


/*
 * function to decode operator in BGP flow spec NLRI when it address a bitmask values (TCP flags, fragmentation flags,...)
 */

static void
decode_bgp_flow_spec_bitmask_operator(proto_tree *tree, tvbuff_t *tvb, gint offset)
{
    static const int * flags[] = {
        &hf_bgp_flowspec_nlri_op_eol,
        &hf_bgp_flowspec_nlri_op_and,
        &hf_bgp_flowspec_nlri_op_val_len,
        &hf_bgp_flowspec_nlri_op_un_bit4,
        &hf_bgp_flowspec_nlri_op_un_bit5,
        &hf_bgp_flowspec_nlri_op_flg_not,
        &hf_bgp_flowspec_nlri_op_flg_match,
        NULL
    };

    proto_tree_add_bitmask(tree, tvb, offset, hf_bgp_flowspec_nlri_op_flags, ett_bgp_flow_spec_nlri_op_flags, flags, ENC_NA);
}

/*
 * Decode an operator and tcp flags bitmask of BGP flow spec NLRI
 */
static int
decode_bgp_nlri_op_tcpf_value(proto_tree *parent_tree, proto_item *parent_item, tvbuff_t *tvb, gint offset)
{
    guint8 nlri_operator;
    guint8 tcp_flags;
    guint cursor_op_val=0;
    guint8 value_len=0;
    guint8 shift_amount=0;
    guint first_loop=0;

    static const int * nlri_tcp_flags[] = {
        &hf_bgp_flowspec_nlri_tcp_flags_cwr,
        &hf_bgp_flowspec_nlri_tcp_flags_ecn,
        &hf_bgp_flowspec_nlri_tcp_flags_urg,
        &hf_bgp_flowspec_nlri_tcp_flags_ack,
        &hf_bgp_flowspec_nlri_tcp_flags_push,
        &hf_bgp_flowspec_nlri_tcp_flags_reset,
        &hf_bgp_flowspec_nlri_tcp_flags_syn,
        &hf_bgp_flowspec_nlri_tcp_flags_fin,
        NULL
    };

    proto_item_append_text(parent_item," (");

    do {
        nlri_operator = tvb_get_guint8(tvb, offset+cursor_op_val);
        shift_amount = nlri_operator&0x30;
        shift_amount = shift_amount >> 4;
        value_len = 1 << shift_amount; /* as written in RFC 5575 section 4 */
        decode_bgp_flow_spec_bitmask_operator(parent_tree, tvb, offset+cursor_op_val); /* call to a operator decode function */
        if (first_loop == 0)
        {
            /* If first operator we remove a white space and or (||) is not relevant */
            proto_item_append_text(parent_item,"%s%s%s%s",
                 ((nlri_operator & BGPNLRI_FSPEC_AND_BIT) == 0) ? "" : "&& ",
                 ((nlri_operator & BGPNLRI_FSPEC_GREATER_THAN) == 0) ? "" : ">",
                 ((nlri_operator & BGPNLRI_FSPEC_LESS_THAN) == 0) ? "" : "<",
                 ((nlri_operator & BGPNLRI_FSPEC_EQUAL) == 0) ? "" : "=");
            first_loop = 1;
        }
        else
        {
            proto_item_append_text(parent_item," %s%s%s%s",
                 ((nlri_operator & BGPNLRI_FSPEC_AND_BIT) == 0) ? "|| " : "&& ",
                 ((nlri_operator & BGPNLRI_FSPEC_GREATER_THAN) == 0) ? "" : ">",
                 ((nlri_operator & BGPNLRI_FSPEC_LESS_THAN) == 0) ? "" : "<",
                 ((nlri_operator & BGPNLRI_FSPEC_EQUAL) == 0) ? "" : "=");
        }
        cursor_op_val++;  /* we manage this operator we move to the value */
        if (value_len == 2) {
            cursor_op_val++; /* tcp flags are coded over 2 bytes only the second one is significant, we move to second byte */
        }

        proto_tree_add_bitmask(parent_tree, tvb, offset+cursor_op_val, hf_bgp_flowspec_nlri_tcp_flags, ett_bgp_flow_spec_nlri_tcp, nlri_tcp_flags, ENC_NA);
        tcp_flags = tvb_get_guint8(tvb,offset+cursor_op_val);

        proto_item_append_text(parent_item," %s%s%s%s%s%s",
             ((tcp_flags & BGPNLRI_FSPEC_TH_URG) == 0) ? "" : "U",
             ((tcp_flags & BGPNLRI_FSPEC_TH_ACK) == 0) ? "" : "A",
             ((tcp_flags & BGPNLRI_FSPEC_TH_PUSH) == 0) ? "" : "P",
             ((tcp_flags & BGPNLRI_FSPEC_TH_RST) == 0) ? "" : "R",
             ((tcp_flags & BGPNLRI_FSPEC_TH_SYN) == 0) ? "" : "S",
             ((tcp_flags & BGPNLRI_FSPEC_TH_FIN) == 0) ? "" : "F");
        cursor_op_val = cursor_op_val + value_len;
    } while ((nlri_operator&BGPNLRI_FSPEC_END_OF_LST) == 0);
    proto_item_append_text(parent_item,")");
    return (cursor_op_val);
}


/*
 * Decode an operator and fragmentation bitmask of BGP flow spec NLRI
 */
static int
decode_bgp_nlri_op_fflag_value(proto_tree *parent_tree, proto_item *parent_item, tvbuff_t *tvb, gint offset)
{
    guint8 nlri_operator;
    guint8 fragment_flags;
    guint cursor_op_val=0;
    guint8 value_len=0;
    guint8 shift_amount=0;
    guint first_loop=0;

    static const int * nlri_flags[] = {
        &hf_bgp_flowspec_nlri_fflag_lf,
        &hf_bgp_flowspec_nlri_fflag_ff,
        &hf_bgp_flowspec_nlri_fflag_isf,
        &hf_bgp_flowspec_nlri_fflag_df,
        NULL
    };

    proto_item_append_text(parent_item," (");

    do {
        nlri_operator = tvb_get_guint8(tvb, offset+cursor_op_val);
        shift_amount = nlri_operator&0x30;
        shift_amount = shift_amount >> 4;
        value_len = 1 << shift_amount; /* as written in RFC 5575 section 4 */
        /* call a function to decode operator addressing bitmaks */
        decode_bgp_flow_spec_bitmask_operator(parent_tree, tvb, offset+cursor_op_val);
        if (first_loop == 0)
        {
            /* If first operator we remove a white space and or (||) is not relevant */
            proto_item_append_text(parent_item,"%s%s%s%s",
                 ((nlri_operator & BGPNLRI_FSPEC_AND_BIT) == 0) ? "" : "&& ",
                 ((nlri_operator & BGPNLRI_FSPEC_GREATER_THAN) == 0) ? "" : ">",
                 ((nlri_operator & BGPNLRI_FSPEC_LESS_THAN) == 0) ? "" : "<",
                 ((nlri_operator & BGPNLRI_FSPEC_EQUAL) == 0) ? "" : "=");
            first_loop = 1;
        }
        else
        {
            proto_item_append_text(parent_item," %s%s%s%s",
                 ((nlri_operator & BGPNLRI_FSPEC_AND_BIT) == 0) ? "|| " : "&& ",
                 ((nlri_operator & BGPNLRI_FSPEC_GREATER_THAN) == 0) ? "" : ">",
                 ((nlri_operator & BGPNLRI_FSPEC_LESS_THAN) == 0) ? "" : "<",
                 ((nlri_operator & BGPNLRI_FSPEC_EQUAL) == 0) ? "" : "=");
        }
        cursor_op_val++;  /* we manage this operator we move to the value */
        if (value_len != 1) {
            return -1; /* frag flags have to be coded in 1 byte */
        }
        fragment_flags = tvb_get_guint8(tvb,offset+cursor_op_val);

        proto_tree_add_bitmask(parent_tree, tvb, offset+cursor_op_val, hf_bgp_flowspec_nlri_fflag, ett_bgp_flow_spec_nlri_ff, nlri_flags, ENC_NA);

        proto_item_append_text(parent_item," %s%s%s%s",
             ((fragment_flags & BGPNLRI_FSPEC_FG_DF) == 0) ? "" : "DF",
             ((fragment_flags & BGPNLRI_FSPEC_FG_ISF) == 0) ? "" : "IsF",
             ((fragment_flags & BGPNLRI_FSPEC_FG_FF) == 0) ? "" : "FF",
             ((fragment_flags & BGPNLRI_FSPEC_FG_LF) == 0) ? "" : "LF");
        cursor_op_val = cursor_op_val + value_len;
    } while ((nlri_operator&BGPNLRI_FSPEC_END_OF_LST) == 0);
    proto_item_append_text(parent_item,")");
    return (cursor_op_val);
}

/*
 * Decode an operator and DSCP value of BGP flow spec NLRI
 */
static int
decode_bgp_nlri_op_dscp_value(proto_tree *parent_tree, proto_item *parent_item, tvbuff_t *tvb, gint offset)
{
    guint8 nlri_operator;
    guint8 dscp_flags;
    guint cursor_op_val=0;
    guint8 value_len=0;
    guint8 shift_amount=0;
    guint first_loop=0;

    proto_item_append_text(parent_item," (");

    do {
        nlri_operator = tvb_get_guint8(tvb, offset+cursor_op_val);
        shift_amount = nlri_operator&0x30;
        shift_amount = shift_amount >> 4;
        value_len = 1 << shift_amount; /* as written in RFC 5575 section 4 */
        /* call a function to decode operator addressing bitmaks */
        decode_bgp_flow_spec_bitmask_operator(parent_tree, tvb, offset+cursor_op_val);
        if (first_loop == 0)
        {
            /* If first operator we remove a white space and or (||) is not relevant */
            proto_item_append_text(parent_item,"%s%s%s%s",
                 ((nlri_operator & BGPNLRI_FSPEC_AND_BIT) == 0) ? "" : "&& ",
                 ((nlri_operator & BGPNLRI_FSPEC_GREATER_THAN) == 0) ? "" : ">",
                 ((nlri_operator & BGPNLRI_FSPEC_LESS_THAN) == 0) ? "" : "<",
                 ((nlri_operator & BGPNLRI_FSPEC_EQUAL) == 0) ? "" : "=");
            first_loop = 1;
        }
        else
        {
            proto_item_append_text(parent_item," %s%s%s%s",
                 ((nlri_operator & BGPNLRI_FSPEC_AND_BIT) == 0) ? "|| " : "&& ",
                 ((nlri_operator & BGPNLRI_FSPEC_GREATER_THAN) == 0) ? "" : ">",
                 ((nlri_operator & BGPNLRI_FSPEC_LESS_THAN) == 0) ? "" : "<",
                 ((nlri_operator & BGPNLRI_FSPEC_EQUAL) == 0) ? "" : "=");
        }
        cursor_op_val++;  /* we manage this operator we move to the value */
        if (value_len != 1) {
            return -1; /* frag flags have to be coded in 1 byte */
        }
        dscp_flags = tvb_get_guint8(tvb,offset+cursor_op_val);
        proto_tree_add_item(parent_tree, hf_bgp_flowspec_nlri_dscp, tvb, offset+cursor_op_val, 1, ENC_BIG_ENDIAN);
        proto_item_append_text(parent_item,"%s",val_to_str_ext_const(dscp_flags,&dscp_vals_ext, "Unknown DSCP"));
        cursor_op_val = cursor_op_val + value_len;
    } while ((nlri_operator&BGPNLRI_FSPEC_END_OF_LST) == 0);
    proto_item_append_text(parent_item,")");
    return (cursor_op_val);
}



/*
 * Decode an FLOWSPEC nlri as define in RFC 5575
 */
static int
decode_flowspec_nlri(proto_tree *tree, tvbuff_t *tvb, gint offset, guint16 afi, packet_info *pinfo)
{
    guint     tot_flow_len;       /* total length of the flow spec NLRI */
    guint     offset_len;         /* offset of the flow spec NLRI itself could be 1 or 2 bytes */
    guint     cursor_fspec;       /* cursor to move into flow spec nlri */
    gint      filter_len = -1;
    guint16   len_16;
    proto_item *item;
    proto_item *filter_item;
    proto_tree *nlri_tree;
    proto_tree *filter_tree;


    if (afi != AFNUM_INET && afi != AFNUM_INET6)
    {
        expert_add_info(pinfo, NULL, &ei_bgp_afi_type_not_supported);
        return(-1);
    }

    tot_flow_len = tvb_get_guint8(tvb, offset);
    /* if nlri length is greater than 240 bytes, it is encoded over 2 bytes */
    /* with most significant nibble all in one. 240 is encoded 0xf0f0, 241 0xf0f1 */
    /* max possible value value is 4095 Oxffff */

    if (tot_flow_len >= 240)
    {
        len_16 = tvb_get_ntohs(tvb, offset);
        tot_flow_len = len_16 & 0x0FFF; /* remove most significant nibble */
        offset_len = 2;
    } else {
        offset_len = 1;
    }

    item = proto_tree_add_item(tree, hf_bgp_flowspec_nlri_t, tvb, offset,
                               tot_flow_len+offset_len, ENC_NA);
    proto_item_set_text(item, "FLOW_SPEC_NLRI (%u byte%s)",
                        tot_flow_len+offset_len, plurality(tot_flow_len+offset_len, "", "s"));

    nlri_tree = proto_item_add_subtree(item, ett_bgp_flow_spec_nlri);

    proto_tree_add_uint(nlri_tree, hf_bgp_flowspec_nlri_length, tvb, offset,
                        offset_len, tot_flow_len);

    offset = offset + offset_len;
    cursor_fspec = 0;

    while (cursor_fspec < tot_flow_len)
    {
        filter_item = proto_tree_add_item(nlri_tree, hf_bgp_flowspec_nlri_filter, tvb, offset+cursor_fspec, 1, ENC_NA);
        filter_tree = proto_item_add_subtree(filter_item, ett_bgp_flow_spec_nlri_filter);
        proto_tree_add_item(filter_tree, hf_bgp_flowspec_nlri_filter_type, tvb, offset+cursor_fspec, 1, ENC_BIG_ENDIAN);
        proto_item_append_text(filter_item, ": %s", val_to_str(tvb_get_guint8(tvb,offset+cursor_fspec), flowspec_nlri_opvaluepair_type, "Unknown filter %d"));
        switch (tvb_get_guint8(tvb,offset+cursor_fspec)) {
        case BGPNLRI_FSPEC_DST_PFIX:
            cursor_fspec++;
            if (afi == AFNUM_INET)
                filter_len = decode_prefix4(filter_tree, pinfo, filter_item, hf_bgp_flowspec_nlri_dst_pref_ipv4,
                                            tvb, offset+cursor_fspec, 0, "Destination IP filter");
            else if (afi == AFNUM_INET6)
                filter_len = decode_fspec_match_prefix6(filter_tree, filter_item, hf_bgp_flowspec_nlri_dst_ipv6_pref,
                                                        tvb, offset+cursor_fspec, 0, pinfo);
            else cursor_fspec = tot_flow_len;
            if (filter_len == -1)
                cursor_fspec= tot_flow_len;
            break;
        case BGPNLRI_FSPEC_SRC_PFIX:
            cursor_fspec++;
            if (afi == AFNUM_INET)
                filter_len = decode_prefix4(filter_tree, pinfo, filter_item, hf_bgp_flowspec_nlri_src_pref_ipv4,
                                            tvb, offset+cursor_fspec, 0, "Source IP filter");
            else if (afi == AFNUM_INET6)
                filter_len = decode_fspec_match_prefix6(filter_tree, filter_item, hf_bgp_flowspec_nlri_src_ipv6_pref,
                                                        tvb, offset+cursor_fspec, 0, pinfo);
            else cursor_fspec = tot_flow_len;
            if (filter_len == -1)
              cursor_fspec= tot_flow_len;
            break;
        case BGPNLRI_FSPEC_IP_PROTO:
            cursor_fspec++;
            filter_len = decode_bgp_nlri_op_dec_value(filter_tree, filter_item, tvb, offset+cursor_fspec);
            break;
        case BGPNLRI_FSPEC_PORT:
            cursor_fspec++;
            filter_len = decode_bgp_nlri_op_dec_value(filter_tree, filter_item, tvb, offset+cursor_fspec);
            break;
        case BGPNLRI_FSPEC_DST_PORT:
            cursor_fspec++;
            filter_len = decode_bgp_nlri_op_dec_value(filter_tree, filter_item, tvb, offset+cursor_fspec);
            break;
        case BGPNLRI_FSPEC_SRC_PORT:
            cursor_fspec++;
            filter_len = decode_bgp_nlri_op_dec_value(filter_tree, filter_item, tvb, offset+cursor_fspec);
            break;
        case BGPNLRI_FSPEC_ICMP_TP:
            cursor_fspec++;
            filter_len = decode_bgp_nlri_op_dec_value(filter_tree, filter_item, tvb, offset+cursor_fspec);
            break;
        case BGPNLRI_FSPEC_ICMP_CD:
            cursor_fspec++;
            filter_len = decode_bgp_nlri_op_dec_value(filter_tree, filter_item, tvb, offset+cursor_fspec);
            break;
        case BGPNLRI_FSPEC_TCP_FLAGS:
            cursor_fspec++;
            filter_len = decode_bgp_nlri_op_tcpf_value(filter_tree, filter_item, tvb, offset+cursor_fspec);
            break;
        case BGPNLRI_FSPEC_PCK_LEN:
            cursor_fspec++;
            filter_len = decode_bgp_nlri_op_dec_value(filter_tree, filter_item, tvb, offset+cursor_fspec);
            break;
        case BGPNLRI_FSPEC_DSCP:
            cursor_fspec++;
            filter_len = decode_bgp_nlri_op_dscp_value(filter_tree, filter_item, tvb, offset+cursor_fspec);
            break;
        case BGPNLRI_FSPEC_FRAGMENT:
            cursor_fspec++;
            filter_len = decode_bgp_nlri_op_fflag_value(filter_tree, filter_item, tvb, offset+cursor_fspec);
            break;
        default:
            return -1;
      }
      if (filter_len>0)
          cursor_fspec += filter_len;
      else
          break;
      proto_item_set_len(filter_item,filter_len+1);
    }
    return(tot_flow_len+offset_len-1);
}

/*
 * Decode an MCAST-VPN nlri as defined in draft-ietf-l3vpn-2547bis-mcast-bgp-08.txt .
 */
static int
decode_mcast_vpn_nlri(proto_tree *tree, tvbuff_t *tvb, gint offset, guint16 afi)
{
    guint8 route_type, length, ip_length;
    proto_item *item;
    proto_tree *nlri_tree;
    guint32 route_key_length;
    int ret;

    ip_length = (afi == AFNUM_INET) ? 4 : 16;

    route_type = tvb_get_guint8(tvb, offset);
    proto_tree_add_item(tree, hf_bgp_mcast_vpn_nlri_route_type, tvb,
                               offset, 1, ENC_BIG_ENDIAN);
    offset++;

    length = tvb_get_guint8(tvb, offset);
    proto_tree_add_item(tree, hf_bgp_mcast_vpn_nlri_length, tvb, offset,
                               1, ENC_BIG_ENDIAN);
    offset++;

    if (length < tvb_reported_length_remaining(tvb, offset))
        return -1;

    item = proto_tree_add_item(tree, hf_bgp_mcast_vpn_nlri_t, tvb, offset,
                               length, ENC_NA);
    proto_item_set_text(item, "%s (%u byte%s)",
                        val_to_str_const(route_type, mcast_vpn_route_type, "Unknown"),
                        length, plurality(length, "", "s"));

    nlri_tree = proto_item_add_subtree(item, ett_bgp_mcast_vpn_nlri);

    switch (route_type) {
        case MCAST_VPN_RTYPE_INTRA_AS_IPMSI_AD:
            item = proto_tree_add_item(nlri_tree, hf_bgp_mcast_vpn_nlri_rd, tvb,
                                       offset, BGP_ROUTE_DISTINGUISHER_SIZE,
                                       ENC_NA);
            proto_item_set_text(item, "Route Distinguisher: %s",
                                decode_bgp_rd(tvb, offset));
            offset += BGP_ROUTE_DISTINGUISHER_SIZE;

            if (afi == AFNUM_INET)
                proto_tree_add_item(nlri_tree,
                                           hf_bgp_mcast_vpn_nlri_origin_router_ipv4,
                                           tvb, offset, ip_length, ENC_BIG_ENDIAN);
            else
                proto_tree_add_item(nlri_tree,
                                           hf_bgp_mcast_vpn_nlri_origin_router_ipv6,
                                           tvb, offset, ip_length, ENC_NA);
            break;

        case MCAST_VPN_RTYPE_INTER_AS_IPMSI_AD:
            item = proto_tree_add_item(nlri_tree, hf_bgp_mcast_vpn_nlri_rd, tvb,
                                       offset, BGP_ROUTE_DISTINGUISHER_SIZE,
                                       ENC_NA);
            proto_item_set_text(item, "Route Distinguisher: %s",
                                decode_bgp_rd(tvb, offset));
            offset += BGP_ROUTE_DISTINGUISHER_SIZE;

            proto_tree_add_item(nlri_tree, hf_bgp_mcast_vpn_nlri_source_as, tvb,
                                offset, 4, ENC_BIG_ENDIAN);
            break;

        case MCAST_VPN_RTYPE_SPMSI_AD:
            item = proto_tree_add_item(nlri_tree, hf_bgp_mcast_vpn_nlri_rd, tvb,
                                       offset, BGP_ROUTE_DISTINGUISHER_SIZE,
                                       ENC_NA);
            proto_item_set_text(item, "Route Distinguisher: %s",
                                decode_bgp_rd(tvb, offset));
            offset += BGP_ROUTE_DISTINGUISHER_SIZE;

            ret = decode_mcast_vpn_nlri_addresses(nlri_tree, tvb, offset);
            if (ret < 0)
                return -1;
            break;

        case MCAST_VPN_RTYPE_LEAF_AD:
            route_key_length = length - ip_length;
            item = proto_tree_add_item(nlri_tree,
                                       hf_bgp_mcast_vpn_nlri_route_key, tvb,
                                       offset, route_key_length, ENC_NA);
            proto_item_set_text(item, "Route Key (%u byte%s)", route_key_length,
                                plurality(route_key_length, "", "s"));
            offset += route_key_length;

            if (afi == AFNUM_INET)
                proto_tree_add_item(nlri_tree,
                                           hf_bgp_mcast_vpn_nlri_origin_router_ipv4,
                                           tvb, offset, ip_length, ENC_BIG_ENDIAN);
            else
                proto_tree_add_item(nlri_tree,
                                           hf_bgp_mcast_vpn_nlri_origin_router_ipv6,
                                           tvb, offset, ip_length, ENC_NA);
            break;

        case MCAST_VPN_RTYPE_SOURCE_ACTIVE_AD:
            item = proto_tree_add_item(nlri_tree, hf_bgp_mcast_vpn_nlri_rd, tvb,
                                       offset, BGP_ROUTE_DISTINGUISHER_SIZE,
                                       ENC_NA);
            proto_item_set_text(item, "Route Distinguisher: %s",
                                decode_bgp_rd(tvb, offset));
            offset += BGP_ROUTE_DISTINGUISHER_SIZE;

            ret = decode_mcast_vpn_nlri_addresses(nlri_tree, tvb, offset);
            if (ret < 0)
                return -1;
            break;

        case MCAST_VPN_RTYPE_SHARED_TREE_JOIN:
        case MCAST_VPN_RTYPE_SOURCE_TREE_JOIN:
            item = proto_tree_add_item(nlri_tree, hf_bgp_mcast_vpn_nlri_rd, tvb,
                                       offset, BGP_ROUTE_DISTINGUISHER_SIZE,
                                       ENC_NA);
            proto_item_set_text(item, "Route Distinguisher: %s",
                                decode_bgp_rd(tvb, offset));
            offset += BGP_ROUTE_DISTINGUISHER_SIZE;

            proto_tree_add_item(nlri_tree, hf_bgp_mcast_vpn_nlri_source_as, tvb,
                                offset, 4, ENC_BIG_ENDIAN);
            offset += 4;

            ret = decode_mcast_vpn_nlri_addresses(nlri_tree, tvb, offset);
            if (ret < 0)
                return -1;
            break;
    }

    /* route type field (1 byte) + length field (1 byte) + length */
    return 2 + length;
}

/*
 * Decodes an MDT-SAFI message.
 */
static guint
decode_mdt_safi(proto_tree *tree, tvbuff_t *tvb, gint offset)
{
    const guint ip_length = 4;
    const guint mdt_safi_nlri_length_bits = 128;
    guint length; /* length in bits */
    gint  orig_offset = offset;
    proto_item *item;

    length = tvb_get_guint8(tvb, offset);
    if (length != mdt_safi_nlri_length_bits)
        return -1;
    offset++;

    item = proto_tree_add_item(tree, hf_bgp_mdt_nlri_safi_rd, tvb,
                               offset, BGP_ROUTE_DISTINGUISHER_SIZE, ENC_NA);
    proto_item_set_text(item, "Route Distinguisher: %s",
                        decode_bgp_rd(tvb, offset));
    offset += BGP_ROUTE_DISTINGUISHER_SIZE;

    proto_tree_add_item(tree, hf_bgp_mdt_nlri_safi_ipv4_addr, tvb,
                        offset, ip_length, ENC_BIG_ENDIAN);
    offset += ip_length;

    proto_tree_add_item(tree, hf_bgp_mdt_nlri_safi_group_addr, tvb,
                        offset, ip_length, ENC_BIG_ENDIAN);
    offset += ip_length;

    return offset - orig_offset;
}

/*
 * Decode an MPLS label stack
 * XXX - We should change *buf to **buf, use wmem_alloc() and drop the buflen
 * argument.
 */
static guint
decode_MPLS_stack(tvbuff_t *tvb, gint offset, wmem_strbuf_t *stack_strbuf)
{
    guint32     label_entry;    /* an MPLS label entry (label + COS field + stack bit   */
    gint        indx;          /* index for the label stack */

    indx = offset ;
    label_entry = 0x000000 ;

    wmem_strbuf_truncate(stack_strbuf, 0);

    while ((label_entry & BGP_MPLS_BOTTOM_L_STACK) == 0) {

        label_entry = tvb_get_ntoh24(tvb, indx) ;

        /* withdrawn routes may contain 0 or 0x800000 in the first label */
        if((indx == offset)&&(label_entry==0||label_entry==0x800000)) {
            wmem_strbuf_append(stack_strbuf, "0 (withdrawn)");
            return (1);
        }

        wmem_strbuf_append_printf(stack_strbuf, "%u%s", label_entry >> 4,
                ((label_entry & BGP_MPLS_BOTTOM_L_STACK) == 0) ? "," : " (bottom)");

        indx += 3 ;

        if ((label_entry & BGP_MPLS_BOTTOM_L_STACK) == 0) {
            /* real MPLS multi-label stack in BGP? - maybe later; for now, it must be a bogus packet */
            wmem_strbuf_append(stack_strbuf, " (BOGUS: Bottom of Stack NOT set!)");
            break;
        }
    }

    return((indx - offset) / 3);
}

static guint
decode_MPLS_stack_tree(tvbuff_t *tvb, gint offset, proto_tree *parent_tree)
{
    guint32     label_entry=0;    /* an MPLS label entry (label + COS field + stack bit)   */
    gint        indx;          /* index for the label stack */
    proto_tree  *labels_tree=NULL;
    proto_item  *labels_item=NULL;
    proto_item  *label_item=NULL;
    indx = offset ;
    label_entry = 0x000000 ;

    labels_item = proto_tree_add_item(parent_tree, hf_bgp_update_mpls_label, tvb, offset, 3, ENC_NA);
    proto_item_append_text(labels_item, ": ");
    labels_tree = proto_item_add_subtree(labels_item, ett_bgp_mpls_labels);
    while ((label_entry & BGP_MPLS_BOTTOM_L_STACK) == 0) {

        label_entry = tvb_get_ntoh24(tvb, indx);
        label_item = proto_tree_add_item(labels_tree, hf_bgp_update_mpls_label_value, tvb, indx, 3, ENC_BIG_ENDIAN);
        /* withdrawn routes may contain 0 or 0x800000 in the first label */
        if((indx == offset)&&(label_entry==0||label_entry==0x800000)) {
            proto_item_append_text(labels_item, " (withdrawn)");
            proto_item_append_text(label_item, " (withdrawn)");
            return (1);
        }

        proto_item_append_text(labels_item, "%u%s", label_entry >> 4,
                ((label_entry & BGP_MPLS_BOTTOM_L_STACK) == 0) ? "," : " (bottom)");
        proto_item_append_text(label_item, "%u%s", label_entry >> 4,
                ((label_entry & BGP_MPLS_BOTTOM_L_STACK) == 0) ? "," : " (bottom)");
        indx += 3 ;

        if ((label_entry & BGP_MPLS_BOTTOM_L_STACK) == 0) {
            /* real MPLS multi-label stack in BGP? - maybe later; for now, it must be a bogus packet */
            proto_item_append_text(labels_item, " (BOGUS: Bottom of Stack NOT set!)");
            break;
        }
    }
    proto_item_set_len(labels_item, (indx - offset));
    return((indx - offset) / 3);
}

/*
 * Decode a multiprotocol address
 */

static int
mp_addr_to_str (guint16 afi, guint8 safi, tvbuff_t *tvb, gint offset, wmem_strbuf_t *strbuf, gint nhlen)
{
    int                 length;                         /* length of the address in byte */
    guint16             rd_type;                        /* Route Distinguisher type     */

    switch (afi) {
        case AFNUM_INET:
            switch (safi) {
                case SAFNUM_UNICAST:
                case SAFNUM_MULCAST:
                case SAFNUM_UNIMULC:
                case SAFNUM_MPLS_LABEL:
                case SAFNUM_ENCAPSULATION:
                case SAFNUM_ROUTE_TARGET:
                    /* RTF NHop can be IPv4 or IPv6. They are differentiated by length of the field*/
                    length = nhlen;
                    if (nhlen == 4) {
                        wmem_strbuf_append(strbuf, tvb_ip_to_str(tvb, offset));
                    } else if (nhlen == 16) {
                        wmem_strbuf_append(strbuf, tvb_ip6_to_str(tvb, offset));
                    } else {
                        wmem_strbuf_append(strbuf, "Unknown address");
                    }
                    break;
                case SAFNUM_TUNNEL:
                    length = 4;
                    wmem_strbuf_append(strbuf, tvb_ip_to_str(tvb, offset));
                    break;
                case SAFNUM_LAB_VPNUNICAST:
                case SAFNUM_LAB_VPNMULCAST:
                case SAFNUM_LAB_VPNUNIMULC:
                    rd_type=tvb_get_ntohs(tvb,offset) ;
                    wmem_strbuf_truncate(strbuf, 0);
                    switch (rd_type) {
                        case FORMAT_AS2_LOC:
                            length = 12;
                            wmem_strbuf_append_printf(strbuf, "Empty Label Stack RD=%u:%u IPv4=%s",
                                                      tvb_get_ntohs(tvb, offset + 2),
                                                      tvb_get_ntohl(tvb, offset + 4),
                                                      tvb_ip_to_str(tvb, offset + 8)); /* Next Hop */
                            break;
                        case FORMAT_IP_LOC:
                            length = 12;
                            wmem_strbuf_append_printf(strbuf, "Empty Label Stack RD=%s:%u IPv4=%s",
                                                      tvb_ip_to_str(tvb, offset + 2), /* IP part of the RD */
                                                      tvb_get_ntohs(tvb, offset + 6),
                                                      tvb_ip_to_str(tvb, offset + 8)); /* Next Hop */
                            break ;
                        case FORMAT_AS4_LOC:
                            length = 12;
                            wmem_strbuf_append_printf(strbuf, "Empty Label Stack RD=%u.%u:%u IPv4=%s",
                                                      tvb_get_ntohs(tvb, offset + 2),
                                                      tvb_get_ntohs(tvb, offset + 4),
                                                      tvb_get_ntohs(tvb, offset + 6),
                                                      tvb_ip_to_str(tvb, offset + 8)); /* Next Hop   */
                            break ;
                        default:
                            length = 0 ;
                            wmem_strbuf_append_printf(strbuf, "Unknown (0x%04x) labeled VPN IPv4 address format",rd_type);
                            break;
                    } /* switch (rd_type) */
                    break;
                default:
                    length = 0 ;
                    wmem_strbuf_truncate(strbuf, 0);
                    wmem_strbuf_append_printf(strbuf, "Unknown SAFI (%u) for AFI %u", safi, afi);
                    break;
            } /* switch (safi) */
            break;
        case AFNUM_INET6:
            wmem_strbuf_truncate(strbuf, 0);
            switch (safi) {
                case SAFNUM_UNICAST:
                case SAFNUM_MULCAST:
                case SAFNUM_UNIMULC:
                case SAFNUM_MPLS_LABEL:
                case SAFNUM_ENCAPSULATION:
                case SAFNUM_TUNNEL:
                    length = 16;
                    wmem_strbuf_append_printf(strbuf, "%s", tvb_ip6_to_str(tvb, offset));
                    break;
                case SAFNUM_LAB_VPNUNICAST:
                case SAFNUM_LAB_VPNMULCAST:
                case SAFNUM_LAB_VPNUNIMULC:
                    rd_type=tvb_get_ntohs(tvb,offset) ;
                    switch (rd_type) {
                        case FORMAT_AS2_LOC:
                            length = 8 + 16;
                            wmem_strbuf_append_printf(strbuf, "Empty Label Stack RD=%u:%u IPv6=%s",
                                                      tvb_get_ntohs(tvb, offset + 2),
                                                      tvb_get_ntohl(tvb, offset + 4),
                                                      tvb_ip6_to_str(tvb, offset + 8)); /* Next Hop */
                            break;
                        case FORMAT_IP_LOC:
                            length = 8 + 16;
                            wmem_strbuf_append_printf(strbuf, "Empty Label Stack RD=%s:%u IPv6=%s",
                                                      tvb_ip_to_str(tvb, offset + 2), /* IP part of the RD */
                                                      tvb_get_ntohs(tvb, offset + 6),
                                                      tvb_ip6_to_str(tvb, offset + 8)); /* Next Hop */
                            break ;
                        case FORMAT_AS4_LOC:
                            length = 8 + 16;
                            wmem_strbuf_append_printf(strbuf, "Empty Label Stack RD=%u:%u IPv6=%s",
                                                      tvb_get_ntohl(tvb, offset + 2),
                                                      tvb_get_ntohs(tvb, offset + 6),
                                                      tvb_ip6_to_str(tvb, offset + 8)); /* Next Hop */
                            break ;
                        default:
                            length = 0 ;
                            wmem_strbuf_append_printf(strbuf, "Unknown (0x%04x) labeled VPN IPv6 address format",rd_type);
                            break;
                    }  /* switch (rd_type) */
                    break;
                default:
                    length = 0 ;
                    wmem_strbuf_append_printf(strbuf, "Unknown SAFI (%u) for AFI %u", safi, afi);
                    break;
            } /* switch (safi) */
            break;
        case AFNUM_L2VPN:
        case AFNUM_L2VPN_OLD:
            wmem_strbuf_truncate(strbuf, 0);
            switch (safi) {
                case SAFNUM_LAB_VPNUNICAST: /* only labeles prefixes do make sense */
                case SAFNUM_LAB_VPNMULCAST:
                case SAFNUM_LAB_VPNUNIMULC:
                case SAFNUM_VPLS:
                    length = 4; /* the next-hop is simply an ipv4 addr */
                    wmem_strbuf_append_printf(strbuf, "IPv4=%s",
                                              tvb_ip_to_str(tvb, offset));
                    break;
                default:
                    length = 0 ;
                    wmem_strbuf_append_printf(strbuf, "Unknown SAFI (%u) for AFI %u", safi, afi);
                    break;
            } /* switch (safi) */
            break;
        case AFNUM_LINK_STATE:
            length = nhlen;
            if (nhlen == 4) {
                wmem_strbuf_append(strbuf, tvb_ip_to_str(tvb, offset));
            } else if (nhlen == 16) {
                wmem_strbuf_append(strbuf, tvb_ip6_to_str(tvb, offset));
            } else {
                wmem_strbuf_append(strbuf, "Unknown address");
            }
            break;
        default:
            length = 0 ;
            wmem_strbuf_truncate(strbuf, 0);
            wmem_strbuf_append_printf(strbuf, "Unknown AFI (%u) value", afi);
            break;
    } /* switch (afi) */
    return(length) ;
}

static int decode_bgp_link_node_descriptor(tvbuff_t *tvb, proto_tree *tree, gint offset, packet_info *pinfo, int length)
{
    guint16 sub_length;
    guint16 type;
    guint16 diss_length;

    proto_item* tlv_item;
    proto_tree* tlv_tree;

    diss_length = 0;

    while (length > 0 ) {
    if (length < 4) {
        expert_add_info_format(pinfo, tree, &ei_bgp_ls_error,
            "Unknown data in Link-State Link NLRI!");
        diss_length += length;
        break;
    }
    type = tvb_get_ntohs(tvb, offset);
    sub_length = tvb_get_ntohs(tvb, offset + 2);

    switch (type) {
        case BGP_NLRI_TLV_AUTONOMOUS_SYSTEM:
              tlv_item = proto_tree_add_item(tree, hf_bgp_ls_tlv_autonomous_system, tvb, offset, sub_length+4, ENC_NA);
              tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_mp_reach_nlri);
              proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
              proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
              if (sub_length != BGP_NLRI_TLV_LEN_AUTONOMOUS_SYSTEM) {
                  expert_add_info_format(pinfo, tree, &ei_bgp_ls_error,
                                         "Autonomous system TLV length should be %u bytes! (%u)",
                                         BGP_NLRI_TLV_LEN_AUTONOMOUS_SYSTEM, sub_length);
                  break;
              }
              proto_tree_add_item(tlv_tree, hf_bgp_ls_tlv_autonomous_system_id, tvb, offset + 4, 4, ENC_BIG_ENDIAN);
          break;
          case BGP_NLRI_TLV_BGP_LS_IDENTIFIER:
              tlv_item = proto_tree_add_item(tree, hf_bgp_ls_tlv_bgp_ls_identifier, tvb, offset, sub_length+4, ENC_NA);
              tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_mp_reach_nlri);
              proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
              proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
              if (sub_length != BGP_NLRI_TLV_LEN_BGP_LS_IDENTIFIER) {
                  expert_add_info_format(pinfo, tree, &ei_bgp_ls_error,
                                         "BGP-LS TLV length should be %u bytes! (%u)",
                                         BGP_NLRI_TLV_LEN_BGP_LS_IDENTIFIER, sub_length);
                  break;
              }
              proto_tree_add_item(tlv_tree, hf_bgp_ls_tlv_bgp_ls_identifier_id, tvb, offset + 4, 4, ENC_BIG_ENDIAN);
          break;
          case BGP_NLRI_TLV_AREA_ID:
              tlv_item = proto_tree_add_item(tree, hf_bgp_ls_tlv_area_id, tvb, offset, sub_length+4, ENC_NA);
              tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_mp_reach_nlri);
              proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
              proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
              if (sub_length != BGP_NLRI_TLV_LEN_AREA_ID) {
                  expert_add_info_format(pinfo, tree, &ei_bgp_ls_error,
                                         "Area ID TLV length should be %u bytes! (%u)",
                                         BGP_NLRI_TLV_LEN_AREA_ID, sub_length);
                  break;
              }
              proto_tree_add_item(tlv_tree, hf_bgp_ls_tlv_area_id_id, tvb, offset + 4, 4, ENC_BIG_ENDIAN);
          break;
          case BGP_NLRI_TLV_IGP_ROUTER_ID:
              tlv_item = proto_tree_add_item(tree, hf_bgp_ls_tlv_igp_router, tvb, offset, sub_length+4, ENC_NA);
              tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_mp_reach_nlri);
              proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
              proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
              proto_tree_add_item(tlv_tree, hf_bgp_ls_tlv_igp_router_id, tvb, offset + 4, sub_length, ENC_NA);
          break;
          default:
              expert_add_info_format(pinfo, tree, &ei_bgp_ls_error, "Undefined node Descriptor Sub-TLV type (%u)!", type);
    }

    length -= 4 + sub_length;
    offset += 4 + sub_length;
    diss_length += 4 + sub_length;
    }
    return diss_length;
}


/*
 * Decode BGP Link State Local and Remote NODE Descriptors
 */
static int decode_bgp_link_node_nlri_tlvs(tvbuff_t *tvb, proto_tree *tree, gint offset, packet_info *pinfo, guint16 expected_sub_tlv)
{
    guint16 length;
    guint16 type;
    proto_tree* tlv_tree;
    proto_item* tlv_item;

    type = tvb_get_ntohs(tvb, offset);
    length = tvb_get_ntohs(tvb, offset + 2);

    if (expected_sub_tlv != type) {
        expert_add_info_format(pinfo, tree, &ei_bgp_ls_error, "Expected/actual tlv mismatch, expected: %u, actual: %u", expected_sub_tlv, type);
    }

    switch(type){

        /*local and remote node descriptors */
        case BGP_NLRI_TLV_LOCAL_NODE_DESCRIPTORS:
            tlv_item = proto_tree_add_item(tree, hf_bgp_ls_tlv_local_node_descriptors, tvb, offset, length+4, ENC_NA);
            tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_mp_reach_nlri);
            proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
            proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
            decode_bgp_link_node_descriptor(tvb, tlv_tree, offset + 4, pinfo, length);
        break;

        case BGP_NLRI_TLV_REMOTE_NODE_DESCRIPTORS:
            tlv_item = proto_tree_add_item(tree, hf_bgp_ls_tlv_remote_node_descriptors, tvb, offset, length+4, ENC_NA);
            tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_mp_reach_nlri);
            proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
            proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
            decode_bgp_link_node_descriptor(tvb, tlv_tree, offset + 4, pinfo, length);
        break;
        }

    return length +4 ;
}

/*
 * Dissect Link and Node NLRI common fields (Protocol-ID, Identifier, Local Node Desc.)
 */
static int decode_bgp_link_node_nlri_common_fields(tvbuff_t *tvb,
        proto_tree *tree, gint offset, packet_info *pinfo, int length) {
    int dissected_length;
    int tmp_length;

    /* dissect Link NLRI header */
    if (length < 12) {
        expert_add_info_format(pinfo, tree, &ei_bgp_ls_error,
                "Link State NLRI length is lower than 12 bytes! (%d)", length);
        return length;
    }

    proto_tree_add_item(tree, hf_bgp_ls_nlri_node_protocol_id, tvb, offset, 1, ENC_BIG_ENDIAN);
    save_link_state_protocol_id(pinfo, tvb_get_guint8(tvb, offset));
    proto_tree_add_item(tree, hf_bgp_ls_nlri_node_identifier, tvb, offset + 1, 8, ENC_BIG_ENDIAN);

    dissected_length = 9;
    offset += dissected_length;
    length -= dissected_length;

    /* dissect Local Node Descriptors TLV */
    if (length > 0 && length < 4) {
        expert_add_info_format(pinfo, tree, &ei_bgp_ls_error,
                "Unknown data in Link-State Link NLRI! length = %d bytes", length);
        return dissected_length;
    }
    if (length < 1)
        return dissected_length;

    tmp_length = decode_bgp_link_node_nlri_tlvs(tvb, tree, offset, pinfo,
                                                BGP_NLRI_TLV_LOCAL_NODE_DESCRIPTORS);
    if (tmp_length < 0) {
       return -1;
    }
    dissected_length += tmp_length;

    return dissected_length;
}


/*
 * Decode Link Descriptors
 */
static int decode_bgp_link_nlri_link_descriptors(tvbuff_t *tvb,
        proto_tree *tree, gint offset, packet_info *pinfo, int length) {

    guint16 sub_length;
    guint16 type;
    guint16 diss_length;
    guint16 tmp16;

    proto_item* tlv_item;
    proto_tree* tlv_tree;
    proto_item* tlv_sub_item;
    proto_tree* tlv_sub_tree;

    tlv_item = proto_tree_add_item(tree, hf_bgp_ls_nlri_link_descriptors_tlv, tvb, offset, length + 4, ENC_NA);
    tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_mp_reach_nlri);

    diss_length = 0;
    while (length > 0) {
        if (length < 4) {
            expert_add_info_format(pinfo, tree, &ei_bgp_ls_error,
                    "Unknown data in Link-State Link NLRI!");
            diss_length += length;
            break;
        }

        type = tvb_get_ntohs(tvb, offset);
        sub_length = tvb_get_ntohs(tvb, offset + 2);
        switch (type) {
            case BGP_NLRI_TLV_LINK_LOCAL_REMOTE_IDENTIFIERS:
                if(sub_length != BGP_NLRI_TLV_LEN_LINK_LOCAL_REMOTE_IDENTIFIERS){
                    expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error,
                                           "Unexpected Link Local/Remote Identifiers TLV's length (%u), it must be %u bytes!",
                                           sub_length, BGP_NLRI_TLV_LEN_LINK_LOCAL_REMOTE_IDENTIFIERS);
                    return -1;
                }
                tlv_sub_item = proto_tree_add_item(tlv_tree,
                                                   hf_bgp_ls_tlv_link_local_remote_identifiers, tvb, offset,
                                                   sub_length + 4, ENC_NA);
                tlv_sub_tree = proto_item_add_subtree(tlv_sub_item, ett_bgp_mp_reach_nlri);
            break;

            case BGP_NLRI_TLV_IPV4_INTERFACE_ADDRESS:
                if(sub_length != BGP_NLRI_TLV_LEN_IPV4_INTERFACE_ADDRESS){
                    expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error,
                                           "Unexpected IPv4 Interface Address TLV's length (%u), it must be %u bytes!",
                                           sub_length, BGP_NLRI_TLV_LEN_IPV4_INTERFACE_ADDRESS);
                    return -1;
                }
                tlv_sub_item = proto_tree_add_item(tlv_tree,
                                                   hf_bgp_ls_tlv_ipv4_interface_address, tvb, offset,
                                                   sub_length + 4, ENC_NA);
                tlv_sub_tree = proto_item_add_subtree(tlv_sub_item, ett_bgp_mp_reach_nlri);
            break;

            case BGP_NLRI_TLV_IPV4_NEIGHBOR_ADDRESS:
                if(sub_length != BGP_NLRI_TLV_LEN_IPV4_NEIGHBOR_ADDRESS){
                    expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error,
                                           "Unexpected IPv4 Neighbor Address TLV's length (%u), it must be %u bytes!",
                                           sub_length, BGP_NLRI_TLV_LEN_IPV4_NEIGHBOR_ADDRESS);
                    return -1;
                }
                tlv_sub_item = proto_tree_add_item(tlv_tree,
                                                   hf_bgp_ls_tlv_ipv4_neighbor_address, tvb, offset,
                                                   sub_length + 4, ENC_NA);
                tlv_sub_tree = proto_item_add_subtree(tlv_sub_item, ett_bgp_mp_reach_nlri);
            break;

            case BGP_NLRI_TLV_IPV6_INTERFACE_ADDRESS:
                if(sub_length != BGP_NLRI_TLV_LEN_IPV6_INTERFACE_ADDRESS){
                    expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error,
                                           "Unexpected IPv6 Interface Address TLV's length (%u), it must be %u bytes!",
                                           sub_length, BGP_NLRI_TLV_LEN_IPV6_INTERFACE_ADDRESS);
                    return -1;
                }
                tlv_sub_item = proto_tree_add_item(tlv_tree,
                                                   hf_bgp_ls_tlv_ipv6_interface_address, tvb, offset,
                                                   sub_length + 4, ENC_NA);
                tlv_sub_tree = proto_item_add_subtree(tlv_sub_item, ett_bgp_mp_reach_nlri);
            break;

            case BGP_NLRI_TLV_IPV6_NEIGHBOR_ADDRESS:
                if(sub_length != BGP_NLRI_TLV_IPV6_NEIGHBOR_ADDRESS){
                    expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error,
                                           "Unexpected IPv6 Neighbor Address TLV's length (%u), it must be %u bytes!",
                                           sub_length, BGP_NLRI_TLV_IPV6_NEIGHBOR_ADDRESS);
                    return -1;
                }
                tlv_sub_item = proto_tree_add_item(tlv_tree,
                                                   hf_bgp_ls_tlv_ipv6_neighbor_address, tvb, offset,
                                                   sub_length + 4, ENC_NA);
                tlv_sub_tree = proto_item_add_subtree(tlv_sub_item, ett_bgp_mp_reach_nlri);
            break;

            case BGP_NLRI_TLV_MULTI_TOPOLOGY_ID:
                if(sub_length != BGP_NLRI_TLV_LEN_MULTI_TOPOLOGY_ID){
                    expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error,
                                           "Unexpected Multi Topology ID TLV's length (%u), it must be %u bytes!",
                                           sub_length, BGP_NLRI_TLV_LEN_MULTI_TOPOLOGY_ID);
                    return -1;
                }
                tlv_sub_item = proto_tree_add_item(tlv_tree,
                        hf_bgp_ls_tlv_multi_topology_id, tvb, offset, sub_length + 4,
                        ENC_NA);
                tlv_sub_tree = proto_item_add_subtree(tlv_sub_item, ett_bgp_mp_reach_nlri);
            break;

            default:
                expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error,
                        "Unknown Link Descriptor TLV Code (%u)!", type);
                return -1;
        }

        proto_tree_add_item(tlv_sub_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
        proto_tree_add_item(tlv_sub_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);

        switch (type) {
            case BGP_NLRI_TLV_LINK_LOCAL_REMOTE_IDENTIFIERS:
                proto_tree_add_item(tlv_sub_tree, hf_bgp_ls_nlri_link_local_identifier, tvb, offset + 4, 4, ENC_BIG_ENDIAN);
                proto_tree_add_item(tlv_sub_tree, hf_bgp_ls_nlri_link_remote_identifier, tvb, offset + 8, 4, ENC_BIG_ENDIAN);
            break;

            case BGP_NLRI_TLV_IPV4_INTERFACE_ADDRESS:
                proto_tree_add_item(tlv_sub_tree, hf_bgp_ls_nlri_ipv4_interface_address, tvb, offset + 4,
                                    BGP_NLRI_TLV_LEN_IPV4_INTERFACE_ADDRESS, ENC_BIG_ENDIAN);
            break;

            case BGP_NLRI_TLV_IPV4_NEIGHBOR_ADDRESS:
                proto_tree_add_item(tlv_sub_tree, hf_bgp_ls_nlri_ipv4_neighbor_address, tvb, offset + 4,
                                    BGP_NLRI_TLV_LEN_IPV4_INTERFACE_ADDRESS, ENC_BIG_ENDIAN);
            break;

            case BGP_NLRI_TLV_IPV6_INTERFACE_ADDRESS:
                proto_tree_add_item(tlv_sub_tree, hf_bgp_ls_nlri_ipv6_interface_address, tvb, offset + 4,
                                    BGP_NLRI_TLV_LEN_IPV6_INTERFACE_ADDRESS, ENC_NA);
            break;

            case BGP_NLRI_TLV_IPV6_NEIGHBOR_ADDRESS:
                proto_tree_add_item(tlv_sub_tree, hf_bgp_ls_nlri_ipv6_neighbor_address, tvb, offset + 4,
                                    BGP_NLRI_TLV_LEN_IPV6_INTERFACE_ADDRESS, ENC_NA);
            break;

            case BGP_NLRI_TLV_MULTI_TOPOLOGY_ID:
                tmp16 = tvb_get_ntohs(tvb, offset + 4);
                tmp16 >>= 12;
                if(tmp16){
                    expert_add_info_format(pinfo, tlv_sub_tree, &ei_bgp_ls_error, "Reserved bits of Multi Topology ID must be set to zero! (%u)", tmp16);
                }
                proto_tree_add_item(tlv_sub_tree, hf_bgp_ls_nlri_multi_topology_id, tvb, offset + 4,
                                    BGP_NLRI_TLV_LEN_MULTI_TOPOLOGY_ID, ENC_BIG_ENDIAN);
            break;
        }

        length -= 4 + sub_length;
        offset += 4 + sub_length;
        diss_length += 4 + sub_length;
    }
    return diss_length;
}

/*
 * Decode Prefix Descriptors
 */
static int decode_bgp_link_nlri_prefix_descriptors(tvbuff_t *tvb,
        proto_tree *tree, gint offset, packet_info *pinfo, int length) {

    guint16 sub_length;
    guint16 type;
    guint16 diss_length;
    guint16 tmp16;

    proto_item* tlv_item;
    proto_tree* tlv_tree;
    proto_item* tlv_sub_item;
    proto_tree* tlv_sub_tree;

    tlv_item = proto_tree_add_item(tree, hf_bgp_ls_nlri_prefix_descriptors_tlv, tvb, offset, length + 4, ENC_NA);
    tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_mp_reach_nlri);

    diss_length = 0;
    while (length > 0) {
        if (length < 4) {
            expert_add_info_format(pinfo, tree, &ei_bgp_ls_error,
                    "Unknown data in Link-State Link NLRI!");
            diss_length += length;
            break;
        }

        type = tvb_get_ntohs(tvb, offset);
        sub_length = tvb_get_ntohs(tvb, offset + 2);
        switch (type) {
            case BGP_NLRI_TLV_MULTI_TOPOLOGY_ID:
                if(sub_length != BGP_NLRI_TLV_LEN_MULTI_TOPOLOGY_ID){
                    expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error,
                                           "Unexpected Multi Topology ID TLV's length (%u), it must be %u bytes!",
                                           sub_length, BGP_NLRI_TLV_LEN_MULTI_TOPOLOGY_ID);
                    return -1;
                }
                tlv_sub_item = proto_tree_add_item(tlv_tree,
                        hf_bgp_ls_tlv_multi_topology_id, tvb, offset, sub_length + 4,
                        ENC_NA);
                tlv_sub_tree = proto_item_add_subtree(tlv_sub_item, ett_bgp_mp_reach_nlri);
            break;

            case BGP_NLRI_TLV_OSPF_ROUTE_TYPE:
                tlv_sub_item = proto_tree_add_item(tlv_tree,
                        hf_bgp_ls_tlv_ospf_route_type, tvb, offset, sub_length + 4,
                        ENC_NA);
                tlv_sub_tree = proto_item_add_subtree(tlv_sub_item, ett_bgp_mp_reach_nlri);
            break;
            case BGP_NLRI_TLV_IP_REACHABILITY_INFORMATION:
                tlv_sub_item = proto_tree_add_item(tlv_tree,
                        hf_bgp_ls_tlv_ip_reachability_information, tvb, offset, sub_length + 4,
                        ENC_NA);
                tlv_sub_tree = proto_item_add_subtree(tlv_sub_item, ett_bgp_mp_reach_nlri);
            break;

            default:
                expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error,
                        "Unknown Prefix Descriptor TLV Code (%u)!", type);
                return -1;
        }

        proto_tree_add_item(tlv_sub_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
        proto_tree_add_item(tlv_sub_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);

        switch (type) {
            case BGP_NLRI_TLV_MULTI_TOPOLOGY_ID:
                tmp16 = tvb_get_ntohs(tvb, offset + 4);
                tmp16 >>= 12;
                if(tmp16){
                    expert_add_info_format(pinfo, tlv_sub_tree, &ei_bgp_ls_error, "Reserved bits of Multi Topology ID must be set to zero! (%u)", tmp16);
                }
                proto_tree_add_item(tlv_sub_tree, hf_bgp_ls_nlri_multi_topology_id, tvb, offset + 4,
                                    BGP_NLRI_TLV_LEN_MULTI_TOPOLOGY_ID, ENC_BIG_ENDIAN);
            break;

            case BGP_NLRI_TLV_OSPF_ROUTE_TYPE:

                if (sub_length != 1) {
                    expert_add_info_format(pinfo, tlv_sub_tree, &ei_bgp_ls_error, "OSPF Route Type length must be \"1\"");
                    break;
                }
                proto_tree_add_item(tlv_sub_tree, hf_bgp_ls_nlri_ospf_route_type, tvb, offset + 4, 1, ENC_BIG_ENDIAN);
            break;

            case BGP_NLRI_TLV_IP_REACHABILITY_INFORMATION:
                if (decode_prefix4(tlv_sub_tree, pinfo, tlv_sub_item, hf_bgp_ls_nlri_ip_reachability_prefix_ip,
                               tvb, offset + 4, 0, "Reachability") == -1)
                    return diss_length;
            break;
        }

        length -= 4 + sub_length;
        offset += 4 + sub_length;
        diss_length += 4 + sub_length;
    }
    return diss_length;
}

/*
 * Decode a multiprotocol prefix
 */
static int
decode_link_state_attribute_tlv(proto_tree *tree, tvbuff_t *tvb, gint offset, packet_info *pinfo, guint8 protocol_id)
{
    guint16 type;
    guint16 length;
    guint8  tmp8;
    guint16 tmp16;
    guint32 tmp32;
    gfloat  tmp_float;
    guint32 mask;
    int n;

    proto_item* tlv_item;
    proto_tree* tlv_tree;
    proto_item* tlv_sub_item;
    proto_tree* tlv_sub_tree;

    type = tvb_get_ntohs(tvb, offset);
    length = tvb_get_ntohs(tvb, offset + 2);

    switch (type) {

        /* NODE ATTRIBUTE TLVs */
        case BGP_NLRI_TLV_MULTI_TOPOLOGY_ID:
            tlv_item = proto_tree_add_item(tree, hf_bgp_ls_tlv_multi_topology_id, tvb, offset, length + 4, ENC_NA);
            tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_link_state);

            for (n = 0; n < (length / BGP_NLRI_TLV_LEN_MULTI_TOPOLOGY_ID); n++) {
                tmp16 = tvb_get_ntohs(tvb, offset + 4 + (n * BGP_NLRI_TLV_LEN_MULTI_TOPOLOGY_ID));
                tmp16 >>= 12;
                if(tmp16){
                    expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error, "Reserved bits of Multi Topology ID must be set to zero! (%u)", tmp16);
                }
                proto_tree_add_item(tlv_tree, hf_bgp_ls_nlri_multi_topology_id, tvb, offset + 4 + (n * BGP_NLRI_TLV_LEN_MULTI_TOPOLOGY_ID),
                                                    BGP_NLRI_TLV_LEN_MULTI_TOPOLOGY_ID, ENC_BIG_ENDIAN);
            }
            break;

        case BGP_NLRI_TLV_NODE_FLAG_BITS:
            {
            static const int * flags[] = {
                &hf_bgp_ls_node_flag_bits_overload,
                &hf_bgp_ls_node_flag_bits_attached,
                &hf_bgp_ls_node_flag_bits_external,
                &hf_bgp_ls_node_flag_bits_abr,
                NULL
            };

            tlv_item = proto_tree_add_item(tree, hf_bgp_ls_tlv_node_flags_bits, tvb, offset, length+4, ENC_NA);
            tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_link_state);
            if(length != BGP_NLRI_TLV_LEN_NODE_FLAG_BITS){
                expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error, "Unexpected Node Flags Bits TLV's length (%u), it must be %u bytes!",
                                       length, BGP_NLRI_TLV_LEN_NODE_FLAG_BITS);
                break;
            }
            proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
            proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
            proto_tree_add_bitmask_list(tlv_tree, tvb, offset+4, 1, flags, ENC_NA);
            tmp8 = tvb_get_guint8(tvb, offset+4) & 0x0f;
            if(tmp8){
                expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error, "Reserved flag bits are not set to zero (%u).", tmp8);
            }
            }
            break;

        case BGP_NLRI_TLV_OPAQUE_NODE_PROPERTIES:
            tlv_item = proto_tree_add_item(tree, hf_bgp_ls_tlv_opaque_node_properties, tvb, offset, length+4, ENC_NA);
            tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_link_state);
            proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
            proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
            proto_tree_add_item(tlv_tree, hf_bgp_ls_tlv_opaque_node_properties_value, tvb, offset + 4, length, ENC_NA);
            break;

        case BGP_NLRI_TLV_NODE_NAME:
            tlv_item = proto_tree_add_item(tree, hf_bgp_ls_tlv_node_name, tvb, offset, length+4, ENC_NA);
            tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_link_state);
            proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
            proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
            proto_tree_add_item(tlv_tree, hf_bgp_ls_tlv_node_name_value, tvb, offset + 4, length, ENC_ASCII|ENC_NA);
            break;

        case BGP_NLRI_TLV_IS_IS_AREA_IDENTIFIER:
            tlv_item = proto_tree_add_item(tree, hf_bgp_ls_tlv_is_is_area_identifier, tvb, offset, length+4, ENC_NA);
            tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_link_state);
            proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
            proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
            proto_tree_add_item(tlv_tree, hf_bgp_ls_tlv_is_is_area_identifier_value, tvb, offset + 4, length, ENC_NA);
            break;

        case BGP_LS_SR_TLV_SR_CAPABILITY:
            {
                /*
                  0  1  2  3  4  5  6  7
                  +--+--+--+--+--+--+--+--+
                  |I |V |H |  |  |  |  |  |
                  +--+--+--+--+--+--+--+--+
                */
                static const int *sr_capabilities_flags[] = {
                    &hf_bgp_ls_sr_tlv_capabilities_flags_i,
                    &hf_bgp_ls_sr_tlv_capabilities_flags_v,
                    &hf_bgp_ls_sr_tlv_capabilities_flags_h,
                    &hf_bgp_ls_sr_tlv_capabilities_flags_reserved,
                    NULL
                };
                gint offset2;
                gint remaining_data;
                tlv_item = proto_tree_add_item(tree, hf_bgp_ls_sr_tlv_capabilities, tvb, offset, length + 4, ENC_NA);
                tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_link_state);
                proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
                proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
                proto_tree_add_bitmask(tlv_tree, tvb, offset + 4, hf_bgp_ls_sr_tlv_capabilities_flags,
                                       ett_bgp_link_state, sr_capabilities_flags, ENC_BIG_ENDIAN);
                /* past flags and reserved byte, we got one or more range + SID/Label Sub-TLV entries */
                offset2 = offset + 4 + 2;
                remaining_data = length - 2;
                while (remaining_data > 0) {
                    guint16 sid_len = 0;
                    /* parse and consume the range field */
                    proto_tree_add_item(tlv_tree, hf_bgp_ls_sr_tlv_capabilities_range_size, tvb, offset2, 3, ENC_BIG_ENDIAN);
                    offset2 += 3;
                    /* parse and consume type/len fields */
                    proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset2, 2, ENC_BIG_ENDIAN);
                    offset2 += 2;
                    proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset2, 2, ENC_BIG_ENDIAN);
                    sid_len = tvb_get_ntohs(tvb, offset2);
                    offset2 += 2;
                    if (sid_len == 3) {
                        /* parse and consume the SID/Label field */
                        proto_tree_add_item(tlv_tree, hf_bgp_ls_sr_tlv_capabilities_sid_label, tvb, offset2, 3, ENC_BIG_ENDIAN);
                        offset2 += 3;
                        remaining_data -= 10;
                    } else {
                        /* parse and consume the SID/Index field */
                        proto_tree_add_item(tlv_tree, hf_bgp_ls_sr_tlv_capabilities_sid_index, tvb, offset2, 4, ENC_BIG_ENDIAN);
                        offset2 += 4;
                        remaining_data -= 11;
                    }
                }
            }
            break;

        case BGP_LS_SR_TLV_SR_ALGORITHM:
            {
                gint offset2;
                gint remaining_data;
                tlv_item = proto_tree_add_item(tree, hf_bgp_ls_sr_tlv_algorithm, tvb, offset, length+4, ENC_NA);
                tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_link_state);
                proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
                proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
                /* past type-length fields, we got one or more 'Algorithm N' value */
                offset2 = offset + 4;
                remaining_data = length;
                while (remaining_data > 0) {
                    proto_tree_add_item(tlv_tree, hf_bgp_ls_sr_tlv_algorithm_value, tvb, offset2, 1, ENC_NA);
                    offset2 += 1;
                    remaining_data -= 1;
                }
            }
            break;

        /* NODE & LINK ATTRIBUTE TLVs */
        case BGP_NLRI_TLV_IPV4_ROUTER_ID_OF_LOCAL_NODE:
            tlv_item = proto_tree_add_item(tree, hf_bgp_ls_tlv_ipv4_router_id_of_local_node, tvb, offset, length+4, ENC_NA);
            tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_link_state);
            proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
            proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
            if(length != BGP_NLRI_TLV_LEN_IPV4_ROUTER_ID_OF_LOCAL_NODE){
                expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error, "Unexpected IPv4 Router-ID TLV's length (%u), it must be %u bytes!",
                                    length, BGP_NLRI_TLV_LEN_IPV4_ROUTER_ID_OF_LOCAL_NODE);
                break;
            }
            proto_tree_add_item(tlv_tree, hf_bgp_ls_tlv_ipv4_router_id_value, tvb, offset + 4, 4, ENC_BIG_ENDIAN);
            break;
        case BGP_NLRI_TLV_IPV6_ROUTER_ID_OF_LOCAL_NODE:
            tlv_item = proto_tree_add_item(tree, hf_bgp_ls_tlv_ipv6_router_id_of_local_node, tvb, offset, length+4, ENC_NA);
            tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_link_state);
            proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
            proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
            if(length != BGP_NLRI_TLV_LEN_IPV6_ROUTER_ID_OF_LOCAL_NODE){
                expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error, "Unexpected IPv6 Router-ID TLV's length (%u), it must be %u bytes!",
                                    length, BGP_NLRI_TLV_LEN_IPV6_ROUTER_ID_OF_LOCAL_NODE);
                break;
            }
            proto_tree_add_item(tlv_tree, hf_bgp_ls_tlv_ipv6_router_id_value, tvb, offset + 4, BGP_NLRI_TLV_LEN_IPV6_ROUTER_ID_OF_LOCAL_NODE, ENC_NA);
            break;

        /* Link Attribute TLVs */
        case BGP_NLRI_TLV_IPV4_ROUTER_ID_OF_REMOTE_NODE:
            tlv_item = proto_tree_add_item(tree, hf_bgp_ls_tlv_ipv4_router_id_of_remote_node, tvb, offset, length+4, ENC_NA);
            tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_link_state);
            proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
            proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
            if(length != BGP_NLRI_TLV_LEN_IPV4_ROUTER_ID_OF_REMOTE_NODE){
                expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error, "Unexpected IPv4 Router-ID TLV's length (%u), it must be %u bytes!",
                                    length, BGP_NLRI_TLV_LEN_IPV4_ROUTER_ID_OF_REMOTE_NODE);
                break;
            }
            proto_tree_add_item(tlv_tree, hf_bgp_ls_tlv_ipv4_router_id_value, tvb, offset + 4, 4, ENC_BIG_ENDIAN);
            break;

        case BGP_NLRI_TLV_IPV6_ROUTER_ID_OF_REMOTE_NODE:
            tlv_item = proto_tree_add_item(tree, hf_bgp_ls_tlv_ipv6_router_id_of_remote_node, tvb, offset, length+4, ENC_NA);
            tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_link_state);
            proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
            proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
            if(length != BGP_NLRI_TLV_LEN_IPV6_ROUTER_ID_OF_REMOTE_NODE){
                expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error, "Unexpected IPv6 Router-ID TLV's length (%u), it must be %u bytes!",
                                    length, BGP_NLRI_TLV_LEN_IPV6_ROUTER_ID_OF_REMOTE_NODE);
                break;
            }
            proto_tree_add_item(tlv_tree, hf_bgp_ls_tlv_ipv6_router_id_value, tvb, offset + 4, BGP_NLRI_TLV_LEN_IPV6_ROUTER_ID_OF_REMOTE_NODE, ENC_NA);
            break;

        case BGP_NLRI_TLV_ADMINISTRATIVE_GROUP_COLOR:
            tlv_item = proto_tree_add_item(tree, hf_bgp_ls_tlv_administrative_group_color, tvb, offset, length+4, ENC_NA);
            tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_link_state);
            if(length != BGP_NLRI_TLV_LEN_ADMINISTRATIVE_GROUP_COLOR){
                expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error, "Unexpected Administrative group (color) TLV's length (%u), it must be %u bytes!",
                                       length, BGP_NLRI_TLV_LEN_ADMINISTRATIVE_GROUP_COLOR);
                break;
            }
            proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
            proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
            tmp32 = tvb_get_ntohl(tvb, offset + 4);
            tlv_sub_item = proto_tree_add_item(tlv_tree, hf_bgp_ls_tlv_administrative_group_color_value, tvb, offset + 4, 4, ENC_BIG_ENDIAN);
            tlv_sub_tree = proto_item_add_subtree(tlv_sub_item, ett_bgp_prefix);
            mask = 1;
            for(n = 0; n<32; n++){
                if( tmp32 & mask ) proto_tree_add_uint(tlv_sub_tree, hf_bgp_ls_tlv_administrative_group, tvb, offset + 4, 4, n);
                mask <<= 1;
            }
            break;

        case BGP_NLRI_TLV_MAX_LINK_BANDWIDTH:
            tlv_item = proto_tree_add_item(tree, hf_bgp_ls_tlv_max_link_bandwidth, tvb, offset, length+4, ENC_NA);
            tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_link_state);
            if(length != BGP_NLRI_TLV_LEN_MAX_LINK_BANDWIDTH){
                expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error, "Unexpected Maximum link bandwidth TLV's length (%u), it must be %u bytes!",
                                       length, BGP_NLRI_TLV_LEN_MAX_LINK_BANDWIDTH);
                break;
            }
            proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
            proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
            tmp_float = tvb_get_ntohieee_float(tvb, offset + 4)*8/1000000;
            proto_tree_add_float_format(tlv_tree, hf_bgp_ls_bandwidth_value, tvb, offset + 4, 4, tmp_float, "Maximum link bandwidth: %.2f Mbps", tmp_float);
            break;

        case BGP_NLRI_TLV_MAX_RESERVABLE_LINK_BANDWIDTH:
            tlv_item = proto_tree_add_item(tree, hf_bgp_ls_tlv_max_reservable_link_bandwidth, tvb, offset, length+4, ENC_NA);
            tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_link_state);
            if(length != BGP_NLRI_TLV_LEN_MAX_RESERVABLE_LINK_BANDWIDTH){
                expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error, "Unexpected Maximum reservable link bandwidth TLV's length (%u), it must be %u bytes!",
                                       length, BGP_NLRI_TLV_LEN_MAX_RESERVABLE_LINK_BANDWIDTH);
                break;
            }
            proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
            proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
            tmp_float = tvb_get_ntohieee_float(tvb, offset + 4)*8/1000000;
            proto_tree_add_float_format(tlv_tree, hf_bgp_ls_bandwidth_value, tvb, offset + 4, 4, tmp_float, "Maximum reservable link bandwidth: %.2f Mbps", tmp_float);
            break;

        case BGP_NLRI_TLV_UNRESERVED_BANDWIDTH:
            tlv_item = proto_tree_add_item(tree, hf_bgp_ls_tlv_unreserved_bandwidth, tvb, offset, length+4, ENC_NA);
            tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_link_state);
            if(length != BGP_NLRI_TLV_LEN_UNRESERVED_BANDWIDTH){
                expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error, "Unexpected Unreserved bandwidth TLV's length (%u), it must be %u bytes!",
                                       length, BGP_NLRI_TLV_LEN_UNRESERVED_BANDWIDTH);
                break;
            }
            proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
            proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
            for(n = 0; n<8; n++){
                tmp_float = tvb_get_ntohieee_float(tvb, offset + 4 + (4 * n))*8/1000000;
                tlv_sub_item = proto_tree_add_float_format(tlv_tree, hf_bgp_ls_bandwidth_value, tvb, offset + 4 + (4 * n), 4, tmp_float, "Unreserved Bandwidth: %.2f Mbps", tmp_float);
                proto_item_prepend_text(tlv_sub_item, "Priority %u, ", n);
            }
            break;

        case BGP_NLRI_TLV_TE_DEFAULT_METRIC:
            tlv_item = proto_tree_add_item(tree, hf_bgp_ls_tlv_te_default_metric, tvb, offset, length+4, ENC_NA);
            tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_link_state);
            /* FF: The 'TE Default Metric TLV's length changed. From draft-ietf-idr-ls-distribution-00 to 04
               was 3 bytes as per RFC5305/3.7, since version 05 is 4 bytes. Here we try to parse both formats
               without complain because there are real implementations out there based on the 3 bytes size. At
               the same time we clearly highlight that 3 is "old" and 4 is correct via expert info. */
            if (length == BGP_NLRI_TLV_LEN_TE_DEFAULT_METRIC_OLD) {
                expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_warn,
                                       "Old TE Default Metric TLV's length (%u), it should be %u bytes!",
                                       length,
                                       BGP_NLRI_TLV_LEN_TE_DEFAULT_METRIC_NEW);
                /* just a warning do not give up dissection */
            }
            if (length != BGP_NLRI_TLV_LEN_TE_DEFAULT_METRIC_OLD && length != BGP_NLRI_TLV_LEN_TE_DEFAULT_METRIC_NEW) {
                expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error,
                                       "Unexpected TE Default Metric TLV's length (%u), it must be %u or %u bytes!",
                                       length,
                                       BGP_NLRI_TLV_LEN_TE_DEFAULT_METRIC_OLD,
                                       BGP_NLRI_TLV_LEN_TE_DEFAULT_METRIC_NEW);
                /* major error give up dissection */
                break;
            }
            proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
            proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
            if (length == BGP_NLRI_TLV_LEN_TE_DEFAULT_METRIC_OLD) {
                proto_tree_add_item(tlv_tree, hf_bgp_ls_tlv_te_default_metric_value_old, tvb, offset + 4, 3, ENC_BIG_ENDIAN);
            } else if (length == BGP_NLRI_TLV_LEN_TE_DEFAULT_METRIC_NEW) {
                proto_tree_add_item(tlv_tree, hf_bgp_ls_tlv_te_default_metric_value, tvb, offset + 4, 4, ENC_BIG_ENDIAN);
            }
            break;

        case BGP_NLRI_TLV_LINK_PROTECTION_TYPE:
            tlv_item = proto_tree_add_item(tree, hf_bgp_ls_tlv_link_protection_type, tvb, offset, length+4, ENC_NA);
            tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_link_state);
            if(length != BGP_NLRI_TLV_LEN_LINK_PROTECTION_TYPE){
                expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error, "Unexpected Link Protection Type TLV's length (%u), it must be %u bytes!",
                                       length, BGP_NLRI_TLV_LEN_LINK_PROTECTION_TYPE);
                break;
            }
            else {
                static const int * nlri_flags[] = {
                    &hf_bgp_ls_link_protection_type_extra_traffic,
                    &hf_bgp_ls_link_protection_type_unprotected,
                    &hf_bgp_ls_link_protection_type_shared,
                    &hf_bgp_ls_link_protection_type_dedicated_1to1,
                    &hf_bgp_ls_link_protection_type_dedicated_1plus1,
                    &hf_bgp_ls_link_protection_type_enhanced,
                    NULL
                };

                proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
                proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
                tmp8 = tvb_get_guint8(tvb, offset + 4);

                tlv_sub_item = proto_tree_add_bitmask(tlv_tree, tvb, offset + 4, hf_bgp_ls_tlv_link_protection_type_value, ett_bgp_mp_reach_nlri, nlri_flags, ENC_NA);
                tmp8 >>= 6;
                if(tmp8){
                    expert_add_info_format(pinfo, tlv_sub_item, &ei_bgp_ls_error, "Reserved Protection Capabilities bits are not set to zero (%u).", tmp8);
                }
                tmp8 = tvb_get_guint8(tvb, offset + 4 + 1);
                if(tmp8){
                    expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error, "Reserved field is not set to zero. (%u)", tmp8);
                }
            }
            break;
        case BGP_NLRI_TLV_MPLS_PROTOCOL_MASK:
            {
            static const int * flags[] = {
                &hf_bgp_ls_mpls_protocol_mask_flag_l,
                &hf_bgp_ls_mpls_protocol_mask_flag_r,
                NULL
            };

            tlv_item = proto_tree_add_item(tree, hf_bgp_ls_tlv_mpls_protocol_mask, tvb, offset, length+4, ENC_NA);
            tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_link_state);
            if(length != BGP_NLRI_TLV_LEN_MPLS_PROTOCOL_MASK){
                expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error, "Unexpected MPLS Protocol Mask TLV's length (%u), it must be %u bytes!",
                                       length, BGP_NLRI_TLV_LEN_MPLS_PROTOCOL_MASK);
                break;
            }
            proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
            proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
            proto_tree_add_bitmask_list(tlv_tree, tvb, offset+4, 1, flags, ENC_NA);
            tmp8 = tvb_get_guint8(tvb, offset + 4) & 0x3f;
            if(tmp8){
                proto_tree_add_expert_format(tlv_tree, pinfo, &ei_bgp_ls_error, tvb, offset + 4, 1,
                                             "Reserved flags are not set to zero (%u).", tmp8);
            }
            }
            break;
        case BGP_NLRI_TLV_METRIC:
            /* FF: The IGP 'Metric TLV's length changed. From draft-ietf-idr-ls-distribution-00 to 02
               was fixed at 3 bytes, since version 03 is variable 1/2/3 bytes. We cannot complain if
               length is not fixed at 3. */
            tlv_item = proto_tree_add_item(tree, hf_bgp_ls_tlv_metric, tvb, offset, length + 4, ENC_NA);
            tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_link_state);
            if (length > BGP_NLRI_TLV_LEN_MAX_METRIC) {
                expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error,
                                       "Unexpected Metric TLV's length (%u), it must be less than %u bytes!",
                                       length, BGP_NLRI_TLV_LEN_MAX_METRIC);
                break;
            }
            proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
            proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
            if (length == 1) {
                proto_tree_add_item(tlv_tree, hf_bgp_ls_tlv_metric_value1, tvb, offset + 4, 1, ENC_BIG_ENDIAN);
            } else if (length == 2) {
                proto_tree_add_item(tlv_tree, hf_bgp_ls_tlv_metric_value2, tvb, offset + 4, 2, ENC_BIG_ENDIAN);
            } else if (length == 3) {
                proto_tree_add_item(tlv_tree, hf_bgp_ls_tlv_metric_value3, tvb, offset + 4, 3, ENC_BIG_ENDIAN);
            }
            break;
        case BGP_NLRI_TLV_SHARED_RISK_LINK_GROUP:
            tlv_item = proto_tree_add_item(tree, hf_bgp_ls_tlv_shared_risk_link_group, tvb, offset, length+4, ENC_NA);
            tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_link_state);
            proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
            proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
            tmp16 = length;
            n = 0;
            while(tmp16 > 0){
                if(tmp16 < 4) {
                    proto_tree_add_expert_format(tlv_tree, pinfo, &ei_bgp_ls_error,
                                                 tvb, offset + 4 + (n * 4), tmp16,
                                                 "Shared Risk Link Group Value must be 4 bytes long (%u).", tmp16);
                    break;
                }
                proto_tree_add_item(tlv_tree, hf_bgp_ls_tlv_shared_risk_link_group_value, tvb, offset + 4 + (n * 4), 4, ENC_BIG_ENDIAN);
                tmp16 -= 4;
                n++;
            }
            break;

        case BGP_NLRI_TLV_OPAQUE_LINK_ATTRIBUTE:
            tlv_item = proto_tree_add_item(tree, hf_bgp_ls_tlv_opaque_link_attribute, tvb, offset, length+4, ENC_NA);
            tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_link_state);
            proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
            proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
            proto_tree_add_item(tlv_tree, hf_bgp_ls_tlv_opaque_link_attribute_value, tvb,  offset + 4, length, ENC_NA);
            break;

        case BGP_NLRI_TLV_LINK_NAME_ATTRIBUTE:
            tlv_item = proto_tree_add_item(tree, hf_bgp_ls_tlv_link_name_attribute, tvb, offset, length+4, ENC_NA);
            tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_link_state);
            proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
            proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
            proto_tree_add_item(tlv_tree, hf_bgp_ls_tlv_link_name_attribute_value, tvb, offset + 4, length, ENC_ASCII|ENC_NA);
            break;

        case BGP_LS_SR_TLV_ADJ_SID:
            {
                /*
                   0  1  2  3  4  5  6  7
                  +--+--+--+--+--+--+--+--+
                  |F |B |V |L |S |  |  |  |
                  +--+--+--+--+--+--+--+--+
                */
                static const int *adj_sid_isis_flags[] = {
                    &hf_bgp_ls_sr_tlv_adjacency_sid_flags_fi,
                    &hf_bgp_ls_sr_tlv_adjacency_sid_flags_bi,
                    &hf_bgp_ls_sr_tlv_adjacency_sid_flags_vi,
                    &hf_bgp_ls_sr_tlv_adjacency_sid_flags_li,
                    &hf_bgp_ls_sr_tlv_adjacency_sid_flags_si,
                    NULL
                };
                /*
                   0  1  2  3  4  5  6  7
                  +--+--+--+--+--+--+--+--+
                  |B |V |L |S |  |  |  |  |
                  +--+--+--+--+--+--+--+--+
                */
                static const int *adj_sid_ospf_flags[] = {
                    &hf_bgp_ls_sr_tlv_adjacency_sid_flags_bo,
                    &hf_bgp_ls_sr_tlv_adjacency_sid_flags_vo,
                    &hf_bgp_ls_sr_tlv_adjacency_sid_flags_lo,
                    &hf_bgp_ls_sr_tlv_adjacency_sid_flags_so,
                    NULL
                };

                tlv_item = proto_tree_add_item(tree, hf_bgp_ls_sr_tlv_adjacency_sid, tvb, offset, length + 4, ENC_NA);
                tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_link_state);
                proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
                proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
                if (protocol_id == BGP_LS_NLRI_PROTO_ID_OSPF) {
                    proto_tree_add_bitmask(tlv_tree, tvb, offset + 4, hf_bgp_ls_sr_tlv_adjacency_sid_flags,
                                           ett_bgp_link_state, adj_sid_ospf_flags, ENC_BIG_ENDIAN);
                } else {
                    /* FF: most common case is IS-IS, so if it is not OSPF we go that way */
                    proto_tree_add_bitmask(tlv_tree, tvb, offset + 4, hf_bgp_ls_sr_tlv_adjacency_sid_flags,
                                           ett_bgp_link_state, adj_sid_isis_flags, ENC_BIG_ENDIAN);
                }
                proto_tree_add_item(tlv_tree, hf_bgp_ls_sr_tlv_adjacency_sid_weight, tvb, offset + 5, 1, ENC_BIG_ENDIAN);
                if (length == 7) {
                    proto_tree_add_item(tlv_tree, hf_bgp_ls_sr_tlv_adjacency_sid_label, tvb, offset + 8, 3, ENC_BIG_ENDIAN);
                } else {
                    proto_tree_add_item(tlv_tree, hf_bgp_ls_sr_tlv_adjacency_sid_index, tvb, offset + 8, 4, ENC_BIG_ENDIAN);
                }
            }
            break;

        case BGP_LS_SR_TLV_LAN_ADJ_SID:
            break;

        /* Prefix Attribute TLVs */
        case BGP_NLRI_TLV_IGP_FLAGS:
            tlv_item = proto_tree_add_item(tree, hf_bgp_ls_tlv_igp_flags, tvb, offset, length+4, ENC_NA);
            tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_link_state);
            if(length != BGP_NLRI_TLV_LEN_IGP_FLAGS){
                expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error, "Unexpected IGP Flags TLV's length (%u), it must be %u bytes!",
                                       length, BGP_NLRI_TLV_IGP_FLAGS);
                break;
            }
            proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
            proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
            proto_tree_add_item(tlv_tree, hf_bgp_ls_igp_flags_flag_d, tvb, offset + 4, 1, ENC_NA);
            tmp8 = tvb_get_guint8(tvb, offset + 4) & 0x7F;
            if(tmp8){
                expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error, "Reserved flags are not set to zero (%u).", tmp8);
            }
            break;

        case BGP_NLRI_TLV_ROUTE_TAG:
            tlv_item = proto_tree_add_item(tree, hf_bgp_ls_tlv_route_tag, tvb, offset, length+4, ENC_NA);
            tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_link_state);
            if(length % 4 != 0) {
                expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error, "Unexpected Route Tag TLV's length (%u mod 4 != 0) ",
                                       length);
                break;
            }
            proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
            proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
            tmp16 = length;
            n = 0;
            while(tmp16){
                if(tmp16 < 4) {
                    expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error, "Route Tag must be 4 bytes long (%u).", tmp16);
                    break;
                }
                proto_tree_add_item(tlv_tree, hf_bgp_ls_tlv_route_tag_value, tvb, offset + 4 + (n * 4), 4, ENC_BIG_ENDIAN);
                tmp16 -= 4;
                n++;
            }
            break;

        case BGP_NLRI_TLV_EXTENDED_TAG:
            tlv_item = proto_tree_add_item(tree, hf_bgp_ls_tlv_route_extended_tag, tvb, offset, length+4, ENC_NA);
            tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_link_state);
            if(length % 8 != 0) {
                expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error, "Unexpected Route Extended Tag TLV's length (%u mod 8 != 0) ",
                                       length);
                break;
            }
            proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
            proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
            tmp16 = length;
            n = 0;
            while(tmp16){
                if(tmp16 < 8) {
                    expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error, "Route Extended Tag must be 8 bytes long (%u).", tmp16);
                    break;
                }
                proto_tree_add_item(tlv_tree, hf_bgp_ls_tlv_route_extended_tag_value, tvb, offset + 4 + (n * 8), 8, ENC_BIG_ENDIAN);
                tmp16 -= 8;
                n++;
            }
            break;

        case BGP_NLRI_TLV_PREFIX_METRIC:
            tlv_item = proto_tree_add_item(tree, hf_bgp_ls_tlv_prefix_metric, tvb, offset, length+4, ENC_NA);
            tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_link_state);
            if(length != BGP_NLRI_TLV_LEN_PREFIX_METRIC){
                expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error, "Unexpected Prefix Metric TLV's length (%u), it must be %u bytes!",
                                       length, BGP_NLRI_TLV_LEN_PREFIX_METRIC);
                break;
            }
            proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
            proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
            proto_tree_add_item(tlv_tree, hf_bgp_ls_tlv_prefix_metric_value, tvb, offset + 4, 4, ENC_BIG_ENDIAN);
            break;

        case BGP_NLRI_TLV_OSPF_FORWARDING_ADDRESS:
            tlv_item = proto_tree_add_item(tree, hf_bgp_ls_ospf_forwarding_address, tvb, offset, length+4, ENC_NA);
            tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_link_state);
            proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
            proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
            if (length == 4) {
                proto_tree_add_item(tlv_tree, hf_bgp_ls_ospf_forwarding_address_ipv4_address, tvb, offset + 4, length, ENC_BIG_ENDIAN);
            }
            else if (length == 16) {
                proto_tree_add_item(tlv_tree, hf_bgp_ls_ospf_forwarding_address_ipv6_address, tvb, offset + 4, length,  ENC_NA);
            }
            else {
                expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error, "Unexpected Prefix Metric TLV's length (%u), it must be 4 or 16 bytes!", length);
                break;
            }
            break;

        case BGP_NLRI_TLV_OPAQUE_PREFIX_ATTRIBUTE:
            tlv_item = proto_tree_add_item(tree, hf_bgp_ls_opaque_prefix_attribute, tvb, offset, length+4, ENC_NA);
            tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_link_state);
            proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
            proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
            proto_tree_add_item(tlv_tree, hf_bgp_ls_opaque_prefix_attribute_value, tvb, offset + 4, length, ENC_NA);
            break;

        case BGP_LS_SR_TLV_PREFIX_SID:
            {
                /*
                   0  1  2  3  4  5  6  7
                  +--+--+--+--+--+--+--+--+
                  |R |N |P |E |V |L |  |  |
                  +--+--+--+--+--+--+--+--+
                */
                static const int *prefix_sid_isis_flags[] = {
                    &hf_bgp_ls_sr_tlv_prefix_sid_flags_r,
                    &hf_bgp_ls_sr_tlv_prefix_sid_flags_n,
                    &hf_bgp_ls_sr_tlv_prefix_sid_flags_p,
                    &hf_bgp_ls_sr_tlv_prefix_sid_flags_e,
                    &hf_bgp_ls_sr_tlv_prefix_sid_flags_v,
                    &hf_bgp_ls_sr_tlv_prefix_sid_flags_l,
                    NULL
                };
                /*
                   0  1  2  3  4  5  6  7
                  +--+--+--+--+--+--+--+--+
                  |  |NP|M |E |V |L |  |  |
                  +--+--+--+--+--+--+--+--+
                */
                static const int *prefix_sid_ospf_flags[] = {
                    &hf_bgp_ls_sr_tlv_prefix_sid_flags_np,
                    &hf_bgp_ls_sr_tlv_prefix_sid_flags_m,
                    &hf_bgp_ls_sr_tlv_prefix_sid_flags_e,
                    &hf_bgp_ls_sr_tlv_prefix_sid_flags_v,
                    &hf_bgp_ls_sr_tlv_prefix_sid_flags_l,
                    NULL
                };

                tlv_item = proto_tree_add_item(tree, hf_bgp_ls_sr_tlv_prefix_sid, tvb, offset, length + 4, ENC_NA);
                tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_link_state);
                proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
                proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
                if (protocol_id == BGP_LS_NLRI_PROTO_ID_OSPF) {
                    proto_tree_add_bitmask(tlv_tree, tvb, offset + 4, hf_bgp_ls_sr_tlv_prefix_sid_flags,
                                           ett_bgp_link_state, prefix_sid_ospf_flags, ENC_BIG_ENDIAN);
                } else {
                    /* FF: most common case is IS-IS, so if it is not OSPF we go that way */
                    proto_tree_add_bitmask(tlv_tree, tvb, offset + 4, hf_bgp_ls_sr_tlv_prefix_sid_flags,
                                           ett_bgp_link_state, prefix_sid_isis_flags, ENC_BIG_ENDIAN);
                }
                proto_tree_add_item(tlv_tree, hf_bgp_ls_sr_tlv_prefix_sid_algo, tvb, offset + 5, 1, ENC_BIG_ENDIAN);
                if (length == 7) {
                    proto_tree_add_item(tlv_tree, hf_bgp_ls_sr_tlv_prefix_sid_label, tvb, offset + 8, 3, ENC_BIG_ENDIAN);
                } else {
                    proto_tree_add_item(tlv_tree, hf_bgp_ls_sr_tlv_prefix_sid_index, tvb, offset + 8, 4, ENC_BIG_ENDIAN);
                }
            }
            break;

        case BGP_LS_SR_TLV_RANGE:
            break;

        case BGP_LS_SR_TLV_BINDING_SID:
            break;

        default:
            expert_add_info_format(pinfo, tree, &ei_bgp_ls_error,
                "Unknown Prefix Descriptor TLV Code (%u)!", type);
            break;
    }
    return length + 4;
}

static int decode_evpn_nlri_esi(proto_tree *tree, tvbuff_t *tvb, gint offset, packet_info *pinfo) {
    guint8 esi_type = 0;
    proto_tree *esi_tree;
    proto_item *ti;
    wmem_allocator_t *buffer_value_string = NULL;

    ti = proto_tree_add_item(tree, hf_bgp_evpn_nlri_esi, tvb, offset, 10, ENC_NA);
    esi_tree = proto_item_add_subtree(ti, ett_bgp_evpn_nlri_esi);
    proto_tree_add_item(esi_tree, hf_bgp_evpn_nlri_esi_type, tvb, offset, 1, ENC_BIG_ENDIAN);
    esi_type = tvb_get_guint8(tvb, offset);
    switch (esi_type) {
        case BGP_NLRI_EVPN_ESI_VALUE :
            proto_tree_add_item(esi_tree, hf_bgp_evpn_nlri_esi_value, tvb,
                                offset+1, 9, ENC_NA);
            proto_item_append_text(ti, ": %s",
                                   tvb_bytes_to_str_punct(buffer_value_string, tvb, offset + 1, 9, ' '));
            break;
        case BGP_NLRI_EVPN_ESI_LACP :
            proto_tree_add_item(esi_tree, hf_bgp_evpn_nlri_esi_lacp_mac, tvb,
                                offset+1, 6, ENC_NA);
            proto_tree_add_item(esi_tree, hf_bgp_evpn_nlri_esi_portk, tvb,
                                offset+7, 2, ENC_NA);
            proto_tree_add_item(esi_tree, hf_bgp_evpn_nlri_esi_remain, tvb,
                                offset+9, 1, ENC_NA);
            proto_item_append_text(ti, ": %s, Key: %s",
                                   tvb_ether_to_str(tvb,offset+1),
                                   tvb_bytes_to_str_punct(buffer_value_string, tvb, offset + 7, 2, ' '));
            break;
        case BGP_NLRI_EVPN_ESI_MSTP :
            proto_tree_add_item(esi_tree, hf_bgp_evpn_nlri_esi_rb_mac, tvb,
                                offset+1, 6, ENC_NA);
            proto_tree_add_item(esi_tree, hf_bgp_evpn_nlri_esi_rbprio, tvb,
                                offset+7, 2, ENC_NA);
            proto_tree_add_item(esi_tree, hf_bgp_evpn_nlri_esi_remain, tvb,
                                offset+9, 1, ENC_NA);
            proto_item_append_text(ti, ": %s, Priority: %s",
                                   tvb_ether_to_str(tvb,offset+1),
                                   tvb_bytes_to_str_punct(buffer_value_string, tvb, offset + 7, 2, ' '));
            break;
        case BGP_NLRI_EVPN_ESI_MAC :
            proto_tree_add_item(esi_tree, hf_bgp_evpn_nlri_esi_sys_mac, tvb,
                                offset+1, 6, ENC_NA);
            proto_tree_add_item(esi_tree, hf_bgp_evpn_nlri_esi_mac_discr, tvb,
                                offset+7, 2, ENC_NA);
            proto_tree_add_item(esi_tree, hf_bgp_evpn_nlri_esi_remain, tvb,
                                offset+9, 1, ENC_NA);
            proto_item_append_text(ti, ": %s, Discriminator: %s",
                                   tvb_ether_to_str(tvb,offset+1),
                                   tvb_bytes_to_str_punct(buffer_value_string, tvb, offset + 7, 2, ' '));
            break;
        case BGP_NLRI_EVPN_ESI_RID :
            proto_tree_add_item(esi_tree, hf_bgp_evpn_nlri_esi_router_id, tvb,
                                offset+1, 4, ENC_BIG_ENDIAN);
            proto_tree_add_item(esi_tree, hf_bgp_evpn_nlri_esi_router_discr, tvb,
                                offset+5, 4, ENC_NA);
            proto_tree_add_item(esi_tree, hf_bgp_evpn_nlri_esi_remain, tvb,
                                offset+9, 1, ENC_NA);
            proto_item_append_text(ti, ": %s, Discriminator: %s",
                                   tvb_ip_to_str(tvb,offset+1),
                                   tvb_bytes_to_str_punct(buffer_value_string, tvb, offset + 5, 4, ' '));
            break;
        case BGP_NLRI_EVPN_ESI_ASN :
            proto_tree_add_item(esi_tree, hf_bgp_evpn_nlri_esi_asn, tvb,
                                offset+1, 4, ENC_BIG_ENDIAN);
            proto_tree_add_item(esi_tree, hf_bgp_evpn_nlri_esi_asn_discr, tvb,
                                offset+5, 4, ENC_NA);
            proto_tree_add_item(esi_tree, hf_bgp_evpn_nlri_esi_remain, tvb,
                                offset+9, 1, ENC_NA);
            proto_item_append_text(ti, ": %u, Discriminator: %s",
                                   tvb_get_ntohl(tvb,offset+1),
                                   tvb_bytes_to_str_punct(buffer_value_string, tvb, offset + 5, 4, ' '));
            break;
        case BGP_NLRI_EVPN_ESI_RES :
            proto_tree_add_item(esi_tree, hf_bgp_evpn_nlri_esi_reserved, tvb,
                                offset+1, 9, ENC_NA);
            break;
        default :
            expert_add_info_format(pinfo, tree, &ei_bgp_evpn_nlri_esi_type_err,
                                   "Invalid EVPN ESI (%u)!", esi_type);
            return (-1);
    }
    return(0);
}

/*
 *  * Decode EVPN NLRI, http://tools.ietf.org/html/draft-ietf-l2vpn-evpn-05#section-7.1
 *   */
static int decode_evpn_nlri(proto_tree *tree, tvbuff_t *tvb, gint offset, packet_info *pinfo) {
    int start_offset = offset;
    proto_tree *prefix_tree;
    proto_item *ti;
    guint8 route_type;
    guint labnum;
    guint8 nlri_len;
    guint8 ip_len;
    guint32 total_length = 0;
    proto_item *item;
    wmem_strbuf_t *stack_strbuf; /* label stack                  */

    route_type = tvb_get_guint8(tvb, offset);

    if (route_type == 0 || route_type > 5) {
        expert_add_info_format(pinfo, tree, &ei_bgp_evpn_nlri_rt_type_err,
                               "Invalid EVPN Route Type (%u)!", route_type);
        return -1;
    }

    nlri_len = tvb_get_guint8(tvb, offset + 1);

    ti = proto_tree_add_item(tree, hf_bgp_evpn_nlri, tvb, start_offset,
                               nlri_len+2, ENC_NA);

    prefix_tree = proto_item_add_subtree(ti, ett_bgp_evpn_nlri);

    proto_tree_add_item(prefix_tree, hf_bgp_evpn_nlri_rt, tvb, start_offset,
                        1, ENC_BIG_ENDIAN);
    proto_item_append_text(ti, ": %s", val_to_str(tvb_get_guint8(tvb, offset), evpnrtypevals, "Unknown capability %d"));

    proto_tree_add_item(prefix_tree, hf_bgp_evpn_nlri_len, tvb, start_offset+1,
                        1, ENC_BIG_ENDIAN);

    if (route_type == EVPN_ETH_SEGMENT_ROUTE && nlri_len < 21) {
        expert_add_info_format(pinfo, prefix_tree, &ei_bgp_evpn_nlri_rt4_len_err,
                               "Invalid length (%u) of EVPN NLRI Route Type 4 (Ethernet Segment Route)!", nlri_len);
        return -1;
    }

    item = proto_tree_add_item(prefix_tree, hf_bgp_evpn_nlri_rd, tvb, start_offset+2,
                               8, ENC_NA);
    proto_item_append_text(item, " (%s)", decode_bgp_rd(tvb, offset + 2));

    switch (route_type) {
    case EVPN_AD_ROUTE:
    /*
                +---------------------------------------+
                |      RD   (8 octets)                  |
                +---------------------------------------+
                |Ethernet Segment Identifier (10 octets)|
                +---------------------------------------+
                |  Ethernet Tag ID (4 octets)           |
                +---------------------------------------+
                |  MPLS Label (3 octets)                |
                +---------------------------------------+
   */

        decode_evpn_nlri_esi(prefix_tree, tvb, start_offset+10, pinfo);

        proto_tree_add_item(prefix_tree, hf_bgp_evpn_nlri_etag, tvb, start_offset+20,
                                   4, ENC_BIG_ENDIAN);

        stack_strbuf = wmem_strbuf_new_label(wmem_packet_scope());
        labnum = decode_MPLS_stack(tvb, offset + 24,
                stack_strbuf);
        proto_tree_add_string(prefix_tree, hf_bgp_evpn_nlri_mpls_ls, tvb, start_offset+24,
                                   labnum*3, wmem_strbuf_get_str(stack_strbuf));

        /*Add 2 for Route Type and Length fields*/
        total_length = 25 + 2;
        break;

    case EVPN_MAC_ROUTE:
/*
        +---------------------------------------+
        |      RD   (8 octets)                  |
        +---------------------------------------+
        |Ethernet Segment Identifier (10 octets)|
        +---------------------------------------+
        |  Ethernet Tag ID (4 octets)           |
        +---------------------------------------+
        |  MAC Address Length (1 octet)         |
        +---------------------------------------+
        |  MAC Address (6 octets)               |
        +---------------------------------------+
        |  IP Address Length (1 octet)          |
        +---------------------------------------+
        |  IP Address (0 or 4 or 16 octets)     |
        +---------------------------------------+
        |  MPLS Label1 (3 octets)               |
        +---------------------------------------+
        |  MPLS Label2 (0 or 3 octets)          |
        +---------------------------------------+

*/

        decode_evpn_nlri_esi(prefix_tree, tvb, start_offset+10, pinfo);

        proto_tree_add_item(prefix_tree, hf_bgp_evpn_nlri_etag, tvb, start_offset+20,
                            4, ENC_BIG_ENDIAN);

        proto_tree_add_item(prefix_tree, hf_bgp_evpn_nlri_maclen, tvb, start_offset+24,
                            1, ENC_BIG_ENDIAN);

        proto_tree_add_item(prefix_tree, hf_bgp_evpn_nlri_mac_addr, tvb, start_offset+25,
                            6, ENC_NA);

        ip_len = tvb_get_guint8(tvb, offset + 31) / 8;
        proto_tree_add_item(prefix_tree, hf_bgp_evpn_nlri_iplen, tvb, start_offset+31,
                            1, ENC_BIG_ENDIAN);

        total_length = 31;

        if (ip_len == 4) {
            /*IPv4 address*/
            proto_tree_add_item(prefix_tree, hf_bgp_evpn_nlri_ip_addr, tvb, start_offset+32,
                                4, ENC_NA);
            total_length += 4;
        } else if (ip_len == 16) {
            /*IPv6 address*/
            proto_tree_add_item(prefix_tree, hf_bgp_evpn_nlri_ipv6_addr, tvb, start_offset+32,
                                16, ENC_NA);
            total_length += 16;
        } else if (ip_len == 0) {
            /*IP not included*/
            proto_tree_add_expert(prefix_tree, pinfo, &ei_bgp_evpn_nlri_rt4_no_ip, tvb, start_offset+32, 1);
        } else {
            return -1;
        }

        stack_strbuf = wmem_strbuf_new_label(wmem_packet_scope());
        labnum = decode_MPLS_stack(tvb, offset + total_length + 1,
                stack_strbuf);
        proto_tree_add_string(prefix_tree, hf_bgp_evpn_nlri_mpls_ls, tvb, start_offset+total_length+1,
                                   labnum*3, wmem_strbuf_get_str(stack_strbuf));

        total_length = total_length + 4;
        break;

    case EVPN_INC_MCAST_TREE:
/*
        +---------------------------------------+
        |      RD   (8 octets)                  |
        +---------------------------------------+
        |  Ethernet Tag ID (4 octets)           |
        +---------------------------------------+
        |  IP Address Length (1 octet)          |
        +---------------------------------------+
        |   Originating Router's IP Addr        |
        |          (4 or 16 octets)             |
        +---------------------------------------+
*/

        proto_tree_add_item(prefix_tree, hf_bgp_evpn_nlri_etag, tvb, start_offset+10,
                            4, ENC_BIG_ENDIAN);

        ip_len = tvb_get_guint8(tvb, offset + 14) / 8;
        proto_tree_add_item(prefix_tree, hf_bgp_evpn_nlri_iplen, tvb, start_offset+14,
                            1, ENC_BIG_ENDIAN);

        total_length = 15;

        if (ip_len == 4) {
            /*IPv4 address*/
            proto_tree_add_item(prefix_tree, hf_bgp_evpn_nlri_ip_addr, tvb, start_offset+15,
                                4, ENC_NA);
            total_length += 4;
        } else if (ip_len == 16) {
            /*IPv6 address*/
            proto_tree_add_item(prefix_tree, hf_bgp_evpn_nlri_ipv6_addr, tvb, start_offset+15,
                                16, ENC_NA);
            total_length += 16;
        } else if (ip_len == 0) {
            /*IP not included*/
            proto_tree_add_expert(prefix_tree, pinfo, &ei_bgp_evpn_nlri_rt4_no_ip, tvb, start_offset, 1);
        } else {
            expert_add_info_format(pinfo, prefix_tree, &ei_bgp_evpn_nlri_rt4_len_err,
                                   "Invalid length of IP Address (%u) in EVPN NLRI Route Type 3 (Iclusive Multicast Tree Route)!", ip_len);
            return -1;
        }
        break;

    case EVPN_ETH_SEGMENT_ROUTE:
/*
        +---------------------------------------+
        |      RD   (8 octets)                  |
        +---------------------------------------+
        |Ethernet Segment Identifier (10 octets)|
        +---------------------------------------+
        |  IP Address Length (1 octet)          |
        +---------------------------------------+
        |   Originating Router's IP Addr        |
        |          (4 or 16 octets)             |
        +---------------------------------------+
*/

        decode_evpn_nlri_esi(prefix_tree, tvb, start_offset+10, pinfo);

        ip_len = tvb_get_guint8(tvb, offset + 20) / 8;
        proto_tree_add_item(prefix_tree, hf_bgp_evpn_nlri_iplen, tvb, start_offset+20,
                            1, ENC_BIG_ENDIAN);

        total_length = 21;

        if (ip_len == 4) {
            /*IPv4 address*/
            proto_tree_add_item(prefix_tree, hf_bgp_evpn_nlri_ip_addr, tvb, start_offset+21,
                                4, ENC_NA);
            total_length += 4;
        } else if (ip_len == 16) {
            /*IPv6 address*/
            proto_tree_add_item(prefix_tree, hf_bgp_evpn_nlri_ipv6_addr, tvb, start_offset+21,
                                16, ENC_NA);
            total_length += 16;
        } else if (ip_len == 0) {
            /*IP not included*/
            proto_tree_add_expert(prefix_tree, pinfo, &ei_bgp_evpn_nlri_rt4_no_ip, tvb, start_offset, 1);
        } else {
            expert_add_info_format(pinfo, prefix_tree, &ei_bgp_evpn_nlri_rt4_len_err,
                                   "Invalid length of IP Address (%u) in EVPN NLRI Route Type 4 (Ethernet Segment Route)!", ip_len);
            return -1;
        }

        break;
    case EVPN_IP_PREFIX_ROUTE:

/*
    +---------------------------------------+
    |      RD   (8 octets)                  |
    +---------------------------------------+
    |Ethernet Segment Identifier (10 octets)|
    +---------------------------------------+
    |  Ethernet Tag ID (4 octets)           |
    +---------------------------------------+
    |  IP Prefix Length (1 octet)           |
    +---------------------------------------+
    |  IP Prefix (4 or 16 octets)           |
    +---------------------------------------+
    |  GW IP Address (4 or 16 octets)       |
    +---------------------------------------+
    |  MPLS Label (3 octets)                |
    +---------------------------------------+
*/

        decode_evpn_nlri_esi(prefix_tree, tvb, start_offset+10, pinfo);

        proto_tree_add_item(prefix_tree, hf_bgp_evpn_nlri_etag, tvb, start_offset+20,
                            4, ENC_BIG_ENDIAN);
        proto_tree_add_item(prefix_tree, hf_bgp_evpn_nlri_prefix_len, tvb, start_offset+24,
                            1, ENC_BIG_ENDIAN);
        switch (nlri_len) {
            case 34 :
                /* IPv4 address */
                proto_tree_add_item(prefix_tree, hf_bgp_evpn_nlri_ip_addr, tvb, start_offset+25,
                                    4, ENC_NA);
                proto_tree_add_item(prefix_tree, hf_bgp_evpn_nlri_ipv4_gtw, tvb, start_offset+29,
                                    4, ENC_NA);
                decode_MPLS_stack_tree(tvb, start_offset+33, prefix_tree);
                total_length =