[mirror_frr.git] / eigrpd / eigrp_structs.h

/*
 * 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_ */
Commit	Line	Data
7f57883e DS	1	/*
	2	* EIGRP Definition of Data Structures.
	3	* Copyright (C) 2013-2016
	4	* Authors:
	5	* Donnie Savage
	6	* Jan Janovic
	7	* Matej Perina
	8	* Peter Orsag
	9	* Peter Paluch
	10	* Frantisek Gazo
	11	* Tomas Hvorkovy
	12	* Martin Kontsek
	13	* Lukas Koribsky
	14	*
	15	* This file is part of GNU Zebra.
	16	*
	17	* GNU Zebra is free software; you can redistribute it and/or modify it
	18	* under the terms of the GNU General Public License as published by the
	19	* Free Software Foundation; either version 2, or (at your option) any
	20	* later version.
	21	*
	22	* GNU Zebra is distributed in the hope that it will be useful, but
	23	* WITHOUT ANY WARRANTY; without even the implied warranty of
	24	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	25	* General Public License for more details.
	26	*
	27	* You should have received a copy of the GNU General Public License
	28	* along with GNU Zebra; see the file COPYING. If not, write to the Free
	29	* Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
	30	* 02111-1307, USA.
	31	*/
	32
	33	#ifndef _ZEBRA_EIGRP_STRUCTS_H_
	34	#define _ZEBRA_EIGRP_STRUCTS_H_
	35
	36	#include "filter.h"
	37
	38	#include "eigrpd/eigrp_const.h"
	39	#include "eigrpd/eigrp_macros.h"
	40
	41	/* EIGRP master for system wide configuration and variables. */
	42	struct eigrp_master
	43	{
	44	/* EIGRP instance. */
	45	struct list *eigrp;
	46
	47	/* EIGRP thread master. */
	48	struct thread_master *master;
	49
	50	/* Zebra interface list. */
	51	struct list *iflist;
	52
	53	/* EIGRP start time. */
	54	time_t start_time;
	55
	56	/* Various EIGRP global configuration. */
	57	u_char options;
	58
	59	#define EIGRP_MASTER_SHUTDOWN (1 << 0) /* deferred-shutdown */
	60	};
	61
	62	struct eigrp_metrics
	63	{
	64	u_int32_t delay;
65	u_int32_t bandwith;
66	unsigned char mtu[3];
67	u_char hop_count;
68	u_char reliability;
69	u_char load;
70	u_char tag;
71	u_char flags;
72	};
73
74	struct eigrp
75	{
76	u_int16_t AS; /* Autonomous system number */
77	u_int16_t vrid; /* Virtual Router ID */
78	u_char k_values[6]; /Array for K values configuration/
79	u_char variance; /Metric variance multiplier/
80	u_char max_paths; /Maximum allowed paths for 1 prefix/
81
82	/Name of this EIGRP instance/
83	char *name;
84
85	/* EIGRP Router ID. */
86	u_int32_t router_id; /* Configured automatically. */
87	u_int32_t router_id_static; /* Configured manually. */
88
89	struct list eiflist; / eigrp interfaces */
90	u_char passive_interface_default; /* passive-interface default */
91
92	unsigned int fd;
93	unsigned int maxsndbuflen;
94
95	u_int32_t sequence_number; /Global EIGRP sequence number/
96
97	struct stream *ibuf;
98	struct list *oi_write_q;
99
100	/Threads/
101	struct thread *t_write;
102	struct thread *t_read;
103	struct thread t_distribute; / timer for distribute list */
104
105	struct route_table networks; / EIGRP config networks. */
106
107	struct list *topology_table;
108
109	u_int64_t serno; /* Global serial number counter for topology entry changes*/
110	u_int64_t serno_last_update; /* Highest serial number of information send by last update*/
111	struct list *topology_changes_internalIPV4;
112	struct list *topology_changes_externalIPV4;
113
114	/Neighbor self/
115	struct eigrp_neighbor *neighbor_self;
116
117	/Configured metric for redistributed routes/
118	struct eigrp_metrics dmetric[ZEBRA_ROUTE_MAX + 1];
119	int redistribute; /* Num of redistributed protocols. */
120
121	/* Access-list. */
122	struct access_list *list[EIGRP_FILTER_MAX];
123	/* Prefix-list. */
124	struct prefix_list *prefix[EIGRP_FILTER_MAX];
125	/* Route-map. */
126	struct route_map *routemap[EIGRP_FILTER_MAX];
127
128	/* For redistribute route map. */
129	struct
130	{
131	char *name;
132	struct route_map *map;
133	int metric_config;
134	u_int32_t metric;
135	} route_map[ZEBRA_ROUTE_MAX];
136
137	QOBJ_FIELDS
138	};
139	DECLARE_QOBJ_TYPE(eigrp)
140	//------------------------------------------------------------------------------------------------------------------------------------------
141
142	/EIGRP interface structure/
143	struct eigrp_interface
144	{
145	/* This interface's parent eigrp instance. */
146	struct eigrp *eigrp;
147
148	/* Interface data from zebra. */
149	struct interface *ifp;
150
151	/* Packet send buffer. */
152	struct eigrp_fifo obuf; / Output queue */
153
154	/* To which multicast groups do we currently belong? */
155
156	/* Configured varables. */
157	struct eigrp_if_params *params;
158
159	u_char multicast_memberships;
160
161	/* EIGRP Network Type. */
162	u_char type;
163
164	struct prefix address; / Interface prefix */
165	struct connected connected; / Pointer to connected */
166
167	/* Neighbor information. */
168	struct list nbrs; / EIGRP Neighbor List */
169
170	/* Threads. */
171	struct thread t_hello; / timer */
172	struct thread t_distribute; / timer for distribute list */
173
174	int on_write_q;
175
176	/* Statistics fields. */
177	u_int32_t hello_in; /* Hello message input count. */
178	u_int32_t update_in; /* Update message input count. */
179	u_int32_t query_in; /* Querry message input count. */
180	u_int32_t reply_in; /* Reply message input count. */
181	u_int32_t hello_out; /* Hello message output count. */
182	u_int32_t update_out; /* Update message output count. */
183	u_int32_t query_out; /* Query message output count. */
184	u_int32_t reply_out; /* Reply message output count. */
185	u_int32_t siaQuery_in;
186	u_int32_t siaQuery_out;
187	u_int32_t siaReply_in;
188	u_int32_t siaReply_out;
189	u_int32_t ack_out;
190	u_int32_t ack_in;
191
192	u_int32_t crypt_seqnum; /* Cryptographic Sequence Number */
193
194	/* Access-list. */
195	struct access_list *list[EIGRP_FILTER_MAX];
196	/* Prefix-list. */
197	struct prefix_list *prefix[EIGRP_FILTER_MAX];
198	/* Route-map. */
199	struct route_map *routemap[EIGRP_FILTER_MAX];
200	};
201
202	struct eigrp_if_params
203	{
204	DECLARE_IF_PARAM (u_char, passive_interface); /* EIGRP Interface is passive: no sending or receiving (no need to join multicast groups) */
205	DECLARE_IF_PARAM (u_int32_t, v_hello); /* Hello Interval */
206	DECLARE_IF_PARAM (u_int16_t, v_wait); /* Router Hold Time Interval */
207	DECLARE_IF_PARAM (u_char, type); /* type of interface */
208	DECLARE_IF_PARAM (u_int32_t, bandwidth);
209	DECLARE_IF_PARAM (u_int32_t, delay);
210	DECLARE_IF_PARAM (u_char, reliability);
211	DECLARE_IF_PARAM (u_char, load);
212
213	DECLARE_IF_PARAM (char , auth_keychain ); / Associated keychain with interface*/
214	DECLARE_IF_PARAM (int, auth_type); /* EIGRP authentication type */
215	};
216
217	enum
218	{
219	MEMBER_ALLROUTERS = 0, MEMBER_MAX,
220	};
221
222	struct eigrp_if_info
223	{
224	struct eigrp_if_params *def_params;
225	struct route_table *params;
226	struct route_table *eifs;
227	unsigned int membership_counts[MEMBER_MAX]; /* multicast group refcnts */
228	};
229
230	//------------------------------------------------------------------------------------------------------------------------------------------
231
232	/* Determines if it is first or last packet
233	* when packet consists of multiple packet
234	* chunks because of many route TLV
235	* (all won't fit into one packet) */
236	enum Packet_part_type
237	{
238	EIGRP_PACKET_PART_NA,
239	EIGRP_PACKET_PART_FIRST,
240	EIGRP_PACKET_PART_LAST
241	};
242
243	/* Neighbor Data Structure */
244	struct eigrp_neighbor
245	{
246	/* This neighbor's parent eigrp interface. */
247	struct eigrp_interface *ei;
248
249	/* EIGRP neighbor Information */
250	u_char state; /* neigbor status. */
251
252	u_int32_t recv_sequence_number; /* Last received sequence Number. */
253	u_int32_t init_sequence_number;
254
255	/If packet is unacknowledged, we try to send it again 16 times/
256	u_char retrans_counter;
257
258	struct in_addr src; /* Neighbor Src address. */
259
260	u_char os_rel_major; // system version - just for show
261	u_char os_rel_minor; // system version - just for show
262	u_char tlv_rel_major; // eigrp version - tells us what TLV format to use
263	u_char tlv_rel_minor; // eigrp version - tells us what TLV format to use
264
265	u_char K1;
266	u_char K2;
267	u_char K3;
268	u_char K4;
269	u_char K5;
270	u_char K6;
271
272	/* Timer values. */
273	u_int16_t v_holddown;
274
275	/* Threads. */
276	struct thread *t_holddown;
277	struct thread t_nbr_send_gr; / thread for sending multiple GR packet chunks */
278
279	struct eigrp_fifo *retrans_queue;
280	struct eigrp_fifo *multicast_queue;
281
282	u_int32_t crypt_seqnum; /* Cryptographic Sequence Number. */
283
284	/* prefixes not received from neighbor during Graceful restart */
285	struct list *nbr_gr_prefixes;
286	/* prefixes not yet send to neighbor during Graceful restart */
287	struct list *nbr_gr_prefixes_send;
288	/* if packet is first or last during Graceful restart */
289	enum Packet_part_type nbr_gr_packet_type;
290	};
291
292	//---------------------------------------------------------------------------------------------------------------------------------------------
293
294
295	struct eigrp_packet
296	{
297	struct eigrp_packet *next;
298	struct eigrp_packet *previous;
299
300	/* Pointer to data stream. */
301	struct stream *s;
302
303	/* IP destination address. */
304	struct in_addr dst;
305
306	/Packet retransmission thread/
307	struct thread *t_retrans_timer;
308
309	/Packet retransmission counter/
310	u_char retrans_counter;
311
312	u_int32_t sequence_number;
313
314	/* EIGRP packet length. */
315	u_int16_t length;
316	};
317
318	struct eigrp_fifo
319	{
320	struct eigrp_packet *head;
321	struct eigrp_packet *tail;
322
323	unsigned long count;
324	};
325
326	struct eigrp_header
327	{
328	u_char version;
329	u_char opcode;
330	u_int16_t checksum;
331	u_int32_t flags;
332	u_int32_t sequence;
333	u_int32_t ack;
334	u_int16_t vrid;
335	u_int16_t ASNumber;
336	char *tlv[0];
337
338	}__attribute__((packed));
339
340
341	/**
342	* Generic TLV type used for packet decoding.
343	*
344	* +-----+------------------+
345	* \| \| \| \|
346	* \| Type\| Len \| Vector \|
347	* \| \| \| \|
348	* +-----+------------------+
349	*/
350	struct eigrp_tlv_hdr_type
351	{
352	u_int16_t type;
353	u_int16_t length;
354	uint8_t value[0];
355	}__attribute__((packed));
356
357	struct TLV_Parameter_Type
358	{
359	u_int16_t type;
360	u_int16_t length;
361	u_char K1;
362	u_char K2;
363	u_char K3;
364	u_char K4;
365	u_char K5;
366	u_char K6;
367	u_int16_t hold_time;
368	}__attribute__((packed));
369
370	struct TLV_MD5_Authentication_Type
371	{
372	u_int16_t type;
373	u_int16_t length;
374	u_int16_t auth_type;
375	u_int16_t auth_length;
376	u_int32_t key_id;
377	u_int32_t key_sequence;
378	u_char Nullpad[8];
379	u_char digest[EIGRP_AUTH_TYPE_MD5_LEN];
380
381	}__attribute__((packed));
382
383	struct TLV_SHA256_Authentication_Type
384	{
385	u_int16_t type;
386	u_int16_t length;
387	u_int16_t auth_type;
388	u_int16_t auth_length;
389	u_int32_t key_id;
390	u_int32_t key_sequence;
391	u_char Nullpad[8];
392	u_char digest[EIGRP_AUTH_TYPE_SHA256_LEN];
393
394	}__attribute__((packed));
395
396	struct TLV_Sequence_Type
397	{
398	u_int16_t type;
399	u_int16_t length;
400	u_char addr_length;
401	struct in_addr *addresses;
402	}__attribute__((packed));
403
404	struct TLV_Next_Multicast_Sequence
405	{
406	u_int16_t type;
407	u_int16_t length;
408	u_int32_t multicast_sequence;
409	}__attribute__((packed));
410
411	struct TLV_Software_Type
412	{
413	u_int16_t type;
414	u_int16_t length;
415	u_char vender_major;
416	u_char vender_minor;
417	u_char eigrp_major;
418	u_char eigrp_minor;
419	}__attribute__((packed));
420
421	struct TLV_IPv4_Internal_type
422	{
423	u_int16_t type;
424	u_int16_t length;
425	struct in_addr forward;
426
427	/Metrics/
428	struct eigrp_metrics metric;
429
430	u_char prefix_length;
431
432	unsigned char destination_part[4];
433	struct in_addr destination;
434	}__attribute__((packed));
435
436	struct TLV_IPv4_External_type
437	{
438	u_int16_t type;
439	u_int16_t length;
440	struct in_addr next_hop;
441	struct in_addr originating_router;
442	u_int32_t originating_as;
443	u_int32_t administrative_tag;
444	u_int32_t external_metric;
445	u_int16_t reserved;
446	u_char external_protocol;
447	u_char external_flags;
448
449	/Metrics/
450	struct eigrp_metrics metric;
451
452	u_char prefix_length;
453	unsigned char destination_part[4];
454	struct in_addr destination;
455	}__attribute__((packed));
456
457	/* EIGRP Peer Termination TLV - used for hard restart */
458	struct TLV_Peer_Termination_type
459	{
460	u_int16_t type;
461	u_int16_t length;
462	u_char unknown;
463	u_int32_t neighbor_ip;
464	} __attribute__((packed));
465
466	/* Who executed Graceful restart */
467	enum GR_type
468	{
469	EIGRP_GR_MANUAL,
470	EIGRP_GR_FILTER
471	};
472
473	//---------------------------------------------------------------------------------------------------------------------------------------------
474
475	/* EIGRP Topology table node structure */
476	struct eigrp_prefix_entry
477	{
478	struct list entries, rij;
479	u_int32_t fdistance; // FD
480	u_int32_t rdistance; // RD
481	u_int32_t distance; // D
482	struct eigrp_metrics reported_metric; // RD for sending
483
484	u_char nt; //network type
485	u_char state; //route fsm state
486	u_char af; // address family
487	u_char req_action; // required action
488
489	struct prefix_ipv4 *destination_ipv4; // pointer to struct with ipv4 address
490	struct prefix_ipv6 *destination_ipv6; // pointer to struct with ipv6 address
491
492	//If network type is REMOTE_EXTERNAL, pointer will have reference to its external TLV
493	struct TLV_IPv4_External_type *extTLV;
494
495	u_int64_t serno; /Serial number for this entry. Increased with each change of entry/
496	};
497
498	/* EIGRP Topology table record structure */
499	struct eigrp_neighbor_entry
500	{
501	struct eigrp_prefix_entry *prefix;
502	u_int32_t reported_distance; //distance reported by neighbor
503	u_int32_t distance; //sum of reported distance and link cost to advertised neighbor
504
505	struct eigrp_metrics reported_metric;
506	struct eigrp_metrics total_metric;
507
508	struct eigrp_neighbor *adv_router; //ip address of advertising neighbor
509	u_char flags; //used for marking successor and FS
510
511	struct eigrp_interface *ei; //pointer for case of connected entry
512
513	};
514
515	//---------------------------------------------------------------------------------------------------------------------------------------------
516
517	/* EIGRP Finite State Machine */
518
519	struct eigrp_fsm_action_message
520	{
521	u_char packet_type; //UPDATE, QUERY, SIAQUERY, SIAREPLY
522	struct eigrp *eigrp; // which thread sent mesg
523	struct eigrp_neighbor *adv_router; //advertising neighbor
524	struct eigrp_neighbor_entry *entry;
525	struct eigrp_prefix_entry *prefix;
526	int data_type; // internal or external tlv type
527	union{
528	struct TLV_IPv4_External_type *ipv4_ext_data;
529	struct TLV_IPv4_Internal_type *ipv4_int_type;
530	}data;
531	};
532
533	#endif /* _ZEBRA_EIGRP_STRUCTURES_H_ */