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diff --git a/eigrpd/eigrp_structs.h b/eigrpd/eigrp_structs.h
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+/*
+ * EIGRP Definition of Data Structures.
+ * Copyright (C) 2013-2016
+ * Authors:
+ * Donnie Savage
+ * Jan Janovic
+ * Matej Perina
+ * Peter Orsag
+ * Peter Paluch
+ * Frantisek Gazo
+ * Tomas Hvorkovy
+ * Martin Kontsek
+ * Lukas Koribsky
+ *
+ * This file is part of GNU Zebra.
+ *
+ * GNU Zebra 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, or (at your option) any
+ * later version.
+ *
+ * GNU Zebra 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 GNU Zebra; see the file COPYING. If not, write to the Free
+ * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ */
+
+#ifndef _ZEBRA_EIGRP_STRUCTS_H_
+#define _ZEBRA_EIGRP_STRUCTS_H_
+
+#include "filter.h"
+
+#include "eigrpd/eigrp_const.h"
+#include "eigrpd/eigrp_macros.h"
+
+/* EIGRP master for system wide configuration and variables. */
+struct eigrp_master
+{
+ /* EIGRP instance. */
+ struct list *eigrp;
+
+ /* EIGRP thread master. */
+ struct thread_master *master;
+
+ /* Zebra interface list. */
+ struct list *iflist;
+
+ /* EIGRP start time. */
+ time_t start_time;
+
+ /* Various EIGRP global configuration. */
+ u_char options;
+
+#define EIGRP_MASTER_SHUTDOWN (1 << 0) /* deferred-shutdown */
+};
+
+struct eigrp_metrics
+{
+ u_int32_t delay;
+ u_int32_t bandwith;
+ unsigned char mtu[3];
+ u_char hop_count;
+ u_char reliability;
+ u_char load;
+ u_char tag;
+ u_char flags;
+};
+
+struct eigrp
+{
+ u_int16_t AS; /* Autonomous system number */
+ u_int16_t vrid; /* Virtual Router ID */
+ u_char k_values[6]; /*Array for K values configuration*/
+ u_char variance; /*Metric variance multiplier*/
+ u_char max_paths; /*Maximum allowed paths for 1 prefix*/
+
+ /*Name of this EIGRP instance*/
+ char *name;
+
+ /* EIGRP Router ID. */
+ u_int32_t router_id; /* Configured automatically. */
+ u_int32_t router_id_static; /* Configured manually. */
+
+ struct list *eiflist; /* eigrp interfaces */
+ u_char passive_interface_default; /* passive-interface default */
+
+ unsigned int fd;
+ unsigned int maxsndbuflen;
+
+ u_int32_t sequence_number; /*Global EIGRP sequence number*/
+
+ struct stream *ibuf;
+ struct list *oi_write_q;
+
+ /*Threads*/
+ struct thread *t_write;
+ struct thread *t_read;
+ struct thread *t_distribute; /* timer for distribute list */
+
+ struct route_table *networks; /* EIGRP config networks. */
+
+ struct list *topology_table;
+
+ u_int64_t serno; /* Global serial number counter for topology entry changes*/
+ u_int64_t serno_last_update; /* Highest serial number of information send by last update*/
+ struct list *topology_changes_internalIPV4;
+ struct list *topology_changes_externalIPV4;
+
+ /*Neighbor self*/
+ struct eigrp_neighbor *neighbor_self;
+
+ /*Configured metric for redistributed routes*/
+ struct eigrp_metrics dmetric[ZEBRA_ROUTE_MAX + 1];
+ int redistribute; /* Num of redistributed protocols. */
+
+ /* Access-list. */
+ struct access_list *list[EIGRP_FILTER_MAX];
+ /* Prefix-list. */
+ struct prefix_list *prefix[EIGRP_FILTER_MAX];
+ /* Route-map. */
+ struct route_map *routemap[EIGRP_FILTER_MAX];
+
+ /* For redistribute route map. */
+ struct
+ {
+ char *name;
+ struct route_map *map;
+ int metric_config;
+ u_int32_t metric;
+ } route_map[ZEBRA_ROUTE_MAX];
+
+ QOBJ_FIELDS
+};
+DECLARE_QOBJ_TYPE(eigrp)
+//------------------------------------------------------------------------------------------------------------------------------------------
+
+/*EIGRP interface structure*/
+struct eigrp_interface
+{
+ /* This interface's parent eigrp instance. */
+ struct eigrp *eigrp;
+
+ /* Interface data from zebra. */
+ struct interface *ifp;
+
+ /* Packet send buffer. */
+ struct eigrp_fifo *obuf; /* Output queue */
+
+ /* To which multicast groups do we currently belong? */
+
+ /* Configured varables. */
+ struct eigrp_if_params *params;
+
+ u_char multicast_memberships;
+
+ /* EIGRP Network Type. */
+ u_char type;
+
+ struct prefix *address; /* Interface prefix */
+ struct connected *connected; /* Pointer to connected */
+
+ /* Neighbor information. */
+ struct list *nbrs; /* EIGRP Neighbor List */
+
+ /* Threads. */
+ struct thread *t_hello; /* timer */
+ struct thread *t_distribute; /* timer for distribute list */
+
+ int on_write_q;
+
+ /* Statistics fields. */
+ u_int32_t hello_in; /* Hello message input count. */
+ u_int32_t update_in; /* Update message input count. */
+ u_int32_t query_in; /* Querry message input count. */
+ u_int32_t reply_in; /* Reply message input count. */
+ u_int32_t hello_out; /* Hello message output count. */
+ u_int32_t update_out; /* Update message output count. */
+ u_int32_t query_out; /* Query message output count. */
+ u_int32_t reply_out; /* Reply message output count. */
+ u_int32_t siaQuery_in;
+ u_int32_t siaQuery_out;
+ u_int32_t siaReply_in;
+ u_int32_t siaReply_out;
+ u_int32_t ack_out;
+ u_int32_t ack_in;
+
+ u_int32_t crypt_seqnum; /* Cryptographic Sequence Number */
+
+ /* Access-list. */
+ struct access_list *list[EIGRP_FILTER_MAX];
+ /* Prefix-list. */
+ struct prefix_list *prefix[EIGRP_FILTER_MAX];
+ /* Route-map. */
+ struct route_map *routemap[EIGRP_FILTER_MAX];
+};
+
+struct eigrp_if_params
+{
+ DECLARE_IF_PARAM (u_char, passive_interface); /* EIGRP Interface is passive: no sending or receiving (no need to join multicast groups) */
+ DECLARE_IF_PARAM (u_int32_t, v_hello); /* Hello Interval */
+ DECLARE_IF_PARAM (u_int16_t, v_wait); /* Router Hold Time Interval */
+ DECLARE_IF_PARAM (u_char, type); /* type of interface */
+ DECLARE_IF_PARAM (u_int32_t, bandwidth);
+ DECLARE_IF_PARAM (u_int32_t, delay);
+ DECLARE_IF_PARAM (u_char, reliability);
+ DECLARE_IF_PARAM (u_char, load);
+
+ DECLARE_IF_PARAM (char *, auth_keychain ); /* Associated keychain with interface*/
+ DECLARE_IF_PARAM (int, auth_type); /* EIGRP authentication type */
+};
+
+enum
+{
+ MEMBER_ALLROUTERS = 0, MEMBER_MAX,
+};
+
+struct eigrp_if_info
+{
+ struct eigrp_if_params *def_params;
+ struct route_table *params;
+ struct route_table *eifs;
+ unsigned int membership_counts[MEMBER_MAX]; /* multicast group refcnts */
+};
+
+//------------------------------------------------------------------------------------------------------------------------------------------
+
+/* Determines if it is first or last packet
+ * when packet consists of multiple packet
+ * chunks because of many route TLV
+ * (all won't fit into one packet) */
+enum Packet_part_type
+{
+ EIGRP_PACKET_PART_NA,
+ EIGRP_PACKET_PART_FIRST,
+ EIGRP_PACKET_PART_LAST
+};
+
+/* Neighbor Data Structure */
+struct eigrp_neighbor
+{
+ /* This neighbor's parent eigrp interface. */
+ struct eigrp_interface *ei;
+
+ /* EIGRP neighbor Information */
+ u_char state; /* neigbor status. */
+
+ u_int32_t recv_sequence_number; /* Last received sequence Number. */
+ u_int32_t init_sequence_number;
+
+ /*If packet is unacknowledged, we try to send it again 16 times*/
+ u_char retrans_counter;
+
+ struct in_addr src; /* Neighbor Src address. */
+
+ u_char os_rel_major; // system version - just for show
+ u_char os_rel_minor; // system version - just for show
+ u_char tlv_rel_major; // eigrp version - tells us what TLV format to use
+ u_char tlv_rel_minor; // eigrp version - tells us what TLV format to use
+
+ u_char K1;
+ u_char K2;
+ u_char K3;
+ u_char K4;
+ u_char K5;
+ u_char K6;
+
+ /* Timer values. */
+ u_int16_t v_holddown;
+
+ /* Threads. */
+ struct thread *t_holddown;
+ struct thread *t_nbr_send_gr; /* thread for sending multiple GR packet chunks */
+
+ struct eigrp_fifo *retrans_queue;
+ struct eigrp_fifo *multicast_queue;
+
+ u_int32_t crypt_seqnum; /* Cryptographic Sequence Number. */
+
+ /* prefixes not received from neighbor during Graceful restart */
+ struct list *nbr_gr_prefixes;
+ /* prefixes not yet send to neighbor during Graceful restart */
+ struct list *nbr_gr_prefixes_send;
+ /* if packet is first or last during Graceful restart */
+ enum Packet_part_type nbr_gr_packet_type;
+};
+
+//---------------------------------------------------------------------------------------------------------------------------------------------
+
+
+struct eigrp_packet
+{
+ struct eigrp_packet *next;
+ struct eigrp_packet *previous;
+
+ /* Pointer to data stream. */
+ struct stream *s;
+
+ /* IP destination address. */
+ struct in_addr dst;
+
+ /*Packet retransmission thread*/
+ struct thread *t_retrans_timer;
+
+ /*Packet retransmission counter*/
+ u_char retrans_counter;
+
+ u_int32_t sequence_number;
+
+ /* EIGRP packet length. */
+ u_int16_t length;
+};
+
+struct eigrp_fifo
+{
+ struct eigrp_packet *head;
+ struct eigrp_packet *tail;
+
+ unsigned long count;
+};
+
+struct eigrp_header
+{
+ u_char version;
+ u_char opcode;
+ u_int16_t checksum;
+ u_int32_t flags;
+ u_int32_t sequence;
+ u_int32_t ack;
+ u_int16_t vrid;
+ u_int16_t ASNumber;
+ char *tlv[0];
+
+}__attribute__((packed));
+
+
+/**
+ * Generic TLV type used for packet decoding.
+ *
+ * +-----+------------------+
+ * | | | |
+ * | Type| Len | Vector |
+ * | | | |
+ * +-----+------------------+
+ */
+struct eigrp_tlv_hdr_type
+{
+ u_int16_t type;
+ u_int16_t length;
+ uint8_t value[0];
+}__attribute__((packed));
+
+struct TLV_Parameter_Type
+{
+ u_int16_t type;
+ u_int16_t length;
+ u_char K1;
+ u_char K2;
+ u_char K3;
+ u_char K4;
+ u_char K5;
+ u_char K6;
+ u_int16_t hold_time;
+}__attribute__((packed));
+
+struct TLV_MD5_Authentication_Type
+{
+ u_int16_t type;
+ u_int16_t length;
+ u_int16_t auth_type;
+ u_int16_t auth_length;
+ u_int32_t key_id;
+ u_int32_t key_sequence;
+ u_char Nullpad[8];
+ u_char digest[EIGRP_AUTH_TYPE_MD5_LEN];
+
+}__attribute__((packed));
+
+struct TLV_SHA256_Authentication_Type
+{
+ u_int16_t type;
+ u_int16_t length;
+ u_int16_t auth_type;
+ u_int16_t auth_length;
+ u_int32_t key_id;
+ u_int32_t key_sequence;
+ u_char Nullpad[8];
+ u_char digest[EIGRP_AUTH_TYPE_SHA256_LEN];
+
+}__attribute__((packed));
+
+struct TLV_Sequence_Type
+{
+ u_int16_t type;
+ u_int16_t length;
+ u_char addr_length;
+ struct in_addr *addresses;
+}__attribute__((packed));
+
+struct TLV_Next_Multicast_Sequence
+{
+ u_int16_t type;
+ u_int16_t length;
+ u_int32_t multicast_sequence;
+}__attribute__((packed));
+
+struct TLV_Software_Type
+{
+ u_int16_t type;
+ u_int16_t length;
+ u_char vender_major;
+ u_char vender_minor;
+ u_char eigrp_major;
+ u_char eigrp_minor;
+}__attribute__((packed));
+
+struct TLV_IPv4_Internal_type
+{
+ u_int16_t type;
+ u_int16_t length;
+ struct in_addr forward;
+
+ /*Metrics*/
+ struct eigrp_metrics metric;
+
+ u_char prefix_length;
+
+ unsigned char destination_part[4];
+ struct in_addr destination;
+}__attribute__((packed));
+
+struct TLV_IPv4_External_type
+{
+ u_int16_t type;
+ u_int16_t length;
+ struct in_addr next_hop;
+ struct in_addr originating_router;
+ u_int32_t originating_as;
+ u_int32_t administrative_tag;
+ u_int32_t external_metric;
+ u_int16_t reserved;
+ u_char external_protocol;
+ u_char external_flags;
+
+ /*Metrics*/
+ struct eigrp_metrics metric;
+
+ u_char prefix_length;
+ unsigned char destination_part[4];
+ struct in_addr destination;
+}__attribute__((packed));
+
+/* EIGRP Peer Termination TLV - used for hard restart */
+struct TLV_Peer_Termination_type
+{
+ u_int16_t type;
+ u_int16_t length;
+ u_char unknown;
+ u_int32_t neighbor_ip;
+} __attribute__((packed));
+
+/* Who executed Graceful restart */
+enum GR_type
+{
+ EIGRP_GR_MANUAL,
+ EIGRP_GR_FILTER
+};
+
+//---------------------------------------------------------------------------------------------------------------------------------------------
+
+/* EIGRP Topology table node structure */
+struct eigrp_prefix_entry
+{
+ struct list *entries, *rij;
+ u_int32_t fdistance; // FD
+ u_int32_t rdistance; // RD
+ u_int32_t distance; // D
+ struct eigrp_metrics reported_metric; // RD for sending
+
+ u_char nt; //network type
+ u_char state; //route fsm state
+ u_char af; // address family
+ u_char req_action; // required action
+
+ struct prefix_ipv4 *destination_ipv4; // pointer to struct with ipv4 address
+ struct prefix_ipv6 *destination_ipv6; // pointer to struct with ipv6 address
+
+ //If network type is REMOTE_EXTERNAL, pointer will have reference to its external TLV
+ struct TLV_IPv4_External_type *extTLV;
+
+ u_int64_t serno; /*Serial number for this entry. Increased with each change of entry*/
+};
+
+/* EIGRP Topology table record structure */
+struct eigrp_neighbor_entry
+{
+ struct eigrp_prefix_entry *prefix;
+ u_int32_t reported_distance; //distance reported by neighbor
+ u_int32_t distance; //sum of reported distance and link cost to advertised neighbor
+
+ struct eigrp_metrics reported_metric;
+ struct eigrp_metrics total_metric;
+
+ struct eigrp_neighbor *adv_router; //ip address of advertising neighbor
+ u_char flags; //used for marking successor and FS
+
+ struct eigrp_interface *ei; //pointer for case of connected entry
+
+};
+
+//---------------------------------------------------------------------------------------------------------------------------------------------
+
+/* EIGRP Finite State Machine */
+
+struct eigrp_fsm_action_message
+{
+ u_char packet_type; //UPDATE, QUERY, SIAQUERY, SIAREPLY
+ struct eigrp *eigrp; // which thread sent mesg
+ struct eigrp_neighbor *adv_router; //advertising neighbor
+ struct eigrp_neighbor_entry *entry;
+ struct eigrp_prefix_entry *prefix;
+ int data_type; // internal or external tlv type
+ union{
+ struct TLV_IPv4_External_type *ipv4_ext_data;
+ struct TLV_IPv4_Internal_type *ipv4_int_type;
+ }data;
+};
+
+#endif /* _ZEBRA_EIGRP_STRUCTURES_H_ */
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