[mirror_frr.git] / isisd / isis_tlv.h

/*
 * IS-IS Rout(e)ing protocol - isis_tlv.h
 *                             IS-IS TLV related routines
 *
 * Copyright (C) 2001,2002   Sampo Saaristo
 *                           Tampere University of Technology
 *                           Institute of Communications Engineering
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public Licenseas 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; see the file COPYING; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 */

#ifndef _ZEBRA_ISIS_TLV_H
#define _ZEBRA_ISIS_TLV_H

#include "isisd/isis_mt.h"

/*
 * The list of TLVs we (should) support.
 * ____________________________________________________________________________
 * Name                   Value  IIH LSP SNP Status
 *                               LAN
 * ____________________________________________________________________________
 *
 * Area Addresses             1   y   y   n  ISO10589
 * IIS Neighbors              2   n   y   n  ISO10589
 * ES Neighbors               3   n   y   n  ISO10589
 * IIS Neighbors              6   y   n   n  ISO10589
 * Padding                    8   y   n   n  ISO10589
 * LSP Entries                9   n   n   y  ISO10589
 * Authentication            10   y   y   y  ISO10589, RFC3567
 * Checksum                  12   y   n   y  RFC3358
 * Extended IS Reachability  22   n   y   n  RFC5305
 * IS Alias                  24   n   y   n  RFC3786
 * IP Int. Reachability     128   n   y   n  RFC1195
 * Protocols Supported      129   y   y   n  RFC1195
 * IP Ext. Reachability     130   n   y   n  RFC1195
 * IDRPI                    131   n   y   y  RFC1195
 * IP Interface Address     132   y   y   n  RFC1195
 * TE Router ID             134   n   y   n  RFC5305
 * Extended IP Reachability 135   n   y   n  RFC5305
 * Dynamic Hostname         137   n   y   n  RFC2763
 * Shared Risk Link Group   138   n   y   y  RFC5307
 * Inter-AS Reachability    141   n   y   n  RFC5316
 * Restart TLV              211   y   n   n  RFC3847
 * MT IS Reachability       222   n   y   n  RFC5120
 * MT Supported             229   y   y   n  RFC5120
 * IPv6 Interface Address   232   y   y   n  RFC5308
 * MT IP Reachability       235   n   y   n  RFC5120
 * IPv6 IP Reachability     236   n   y   n  RFC5308
 * MT IPv6 IP Reachability  237   n   y   n  RFC5120
 * P2P Adjacency State      240   y   n   n  RFC3373
 * IIH Sequence Number      241   y   n   n  draft-shen-isis-iih-sequence
 * Router Capability        242   n   y   n  RFC4971
 *
 *
 * IS Reachability sub-TLVs we support (See isis_te.[c,h])
 * ____________________________________________________________________________
 * Name                           Value   Status
 * ____________________________________________________________________________
 * Administartive group (color)       3   RFC5305
 * Link Local/Remote Identifiers      4   RFC5307
 * IPv4 interface address             6   RFC5305
 * IPv4 neighbor address              8   RFC5305
 * Maximum link bandwidth             9   RFC5305
 * Reservable link bandwidth         10   RFC5305
 * Unreserved bandwidth              11   RFC5305
 * TE Default metric                 18   RFC5305
 * Link Protection Type              20   RFC5307
 * Interface Switching Capability    21   RFC5307
 * Remote AS number                  24   RFC5316
 * IPv4 Remote ASBR identifier       25   RFC5316
 *
 *
 * IP Reachability sub-TLVs we (should) support.
 * ____________________________________________________________________________
 * Name                           Value   Status
 * ____________________________________________________________________________
 * 32bit administrative tag           1   RFC5130
 * 64bit administrative tag           2   RFC5130
 * Management prefix color          117   RFC5120
 */

#define AREA_ADDRESSES            1
#define IS_NEIGHBOURS             2
#define ES_NEIGHBOURS             3
#define LAN_NEIGHBOURS            6
#define PADDING                   8
#define LSP_ENTRIES               9
#define AUTH_INFO                 10
#define CHECKSUM                  12
#define TE_IS_NEIGHBOURS          22
#define IS_ALIAS                  24
#define IPV4_INT_REACHABILITY     128
#define PROTOCOLS_SUPPORTED       129
#define IPV4_EXT_REACHABILITY     130
#define IDRP_INFO                 131
#define IPV4_ADDR                 132
#define TE_ROUTER_ID              134
#define TE_IPV4_REACHABILITY      135
#define DYNAMIC_HOSTNAME          137
#define GRACEFUL_RESTART          211
#define MT_IS_NEIGHBOURS          222
#define MT_ROUTER_INFORMATION     229
#define IPV6_ADDR                 232
#define MT_IPV4_REACHABILITY      235
#define IPV6_REACHABILITY         236
#define MT_IPV6_REACHABILITY      237
#define WAY3_HELLO                240
#define ROUTER_INFORMATION        242

#define AUTH_INFO_HDRLEN          3

#define MAX_TLV_LEN 255

#define IS_NEIGHBOURS_LEN (ISIS_SYS_ID_LEN + 5)
#define LAN_NEIGHBOURS_LEN 6
#define LSP_ENTRIES_LEN (10 + ISIS_SYS_ID_LEN)	/* FIXME: should be entry */
#define IPV4_REACH_LEN 12
#define IPV6_REACH_LEN 22
#define TE_IPV4_REACH_LEN 9

#define MAX_SUBTLV_SIZE         256

/* struct for neighbor */
struct is_neigh {
	struct metric metrics;
	u_char neigh_id[ISIS_SYS_ID_LEN + 1];
};

/* struct for te metric */
struct te_is_neigh {
	u_char neigh_id[ISIS_SYS_ID_LEN + 1];
	u_char te_metric[3];
	u_char sub_tlvs_length;
	/* Theorical Maximum SubTLVs is 256 because the sub_tlvs_length is 8
	 * bits */
	/* Practically, 118 bytes are necessary to store all supported TE
	 * parameters */
	/* FIXME: A pointer will use less memory, but need to be free */
	/* which is hard to fix, especially within free_tlvs() function */
	/* and malloc() / free() as a CPU cost compared to the memory usage */
	u_char sub_tlvs[MAX_SUBTLV_SIZE]; /* SUB TLVs storage */
};

/* Decode and encode three-octet metric into host byte order integer */
#define GET_TE_METRIC(t)                                                       \
	(((unsigned)(t)->te_metric[0] << 16) | ((t)->te_metric[1] << 8)        \
	 | (t)->te_metric[2])
#define SET_TE_METRIC(t, m)                                                    \
	(((t)->te_metric[0] = (m) >> 16), ((t)->te_metric[1] = (m) >> 8),      \
	 ((t)->te_metric[2] = (m)))

/* struct for es neighbors */
struct es_neigh {
	struct metric metrics;
	/* approximate position of first, we use the
	 * length ((uchar*)metric-1) to know all     */
	u_char first_es_neigh[ISIS_SYS_ID_LEN];
};

struct partition_desig_level2_is {
	struct list *isis_system_ids;
};

/* struct for lan neighbors */
struct lan_neigh {
	u_char LAN_addr[6];
};

#ifdef __SUNPRO_C
#pragma pack(1)
#endif

/* struct for LSP entry */
struct lsp_entry {
	u_int16_t rem_lifetime;
	u_char lsp_id[ISIS_SYS_ID_LEN + 2];
	u_int32_t seq_num;
	u_int16_t checksum;
} __attribute__((packed));

#ifdef __SUNPRO_C
#pragma pack()
#endif

/* struct for checksum */
struct checksum {
	u_int16_t checksum;
};

/* ipv4 reachability */
struct ipv4_reachability {
	struct metric metrics;
	struct in_addr prefix;
	struct in_addr mask;
};

/* te router id */
struct te_router_id {
	struct in_addr id;
};

/* te ipv4 reachability */
struct te_ipv4_reachability {
	u_int32_t te_metric;
	u_char control;
	u_char prefix_start; /* since this is variable length by nature it only
				*/
};			     /* points to an approximate location */

#define TE_IPV4_HAS_SUBTLV (0x40)

struct idrp_info {
	u_char len;
	u_char *value;
};

struct ipv6_reachability {
	u_int32_t metric;
	u_char control_info;
	u_char prefix_len;
	u_char prefix[16];
};

/* bits in control_info */
#define CTRL_INFO_DIRECTION    0x80
#define DIRECTION_UP           0x00
#define DIRECTION_DOWN         0x80

#define CTRL_INFO_DISTRIBUTION 0x40
#define DISTRIBUTION_INTERNAL  0x00
#define DISTRIBUTION_EXTERNAL  0x40

#define CTRL_INFO_SUBTLVS      0x20

struct mt_router_info {
	ISIS_MT_INFO_FIELDS
	bool overload;
};

/*
 * Pointer to each tlv type, filled by parse_tlvs()
 */
struct tlvs {
	struct checksum *checksum;
	struct hostname *hostname;
	struct nlpids *nlpids;
	struct te_router_id *router_id;
	struct list *area_addrs;
	struct list *mt_router_info;
	struct list *is_neighs;
	struct list *te_is_neighs;
	struct list *mt_is_neighs;
	struct list *es_neighs;
	struct list *lsp_entries;
	struct list *prefix_neighs;
	struct list *lan_neighs;
	struct list *ipv4_addrs;
	struct list *ipv4_int_reachs;
	struct list *ipv4_ext_reachs;
	struct list *te_ipv4_reachs;
	struct list *mt_ipv4_reachs;
	struct list *ipv6_addrs;
	struct list *ipv6_reachs;
	struct list *mt_ipv6_reachs;
	struct isis_passwd auth_info;
};

/*
 * Own definitions - used to bitmask found and expected
 */

#define TLVFLAG_AREA_ADDRS                (1<<0)
#define TLVFLAG_IS_NEIGHS                 (1<<1)
#define TLVFLAG_ES_NEIGHS                 (1<<2)
#define TLVFLAG_PARTITION_DESIG_LEVEL2_IS (1<<3)
#define TLVFLAG_PREFIX_NEIGHS             (1<<4)
#define TLVFLAG_LAN_NEIGHS                (1<<5)
#define TLVFLAG_LSP_ENTRIES               (1<<6)
#define TLVFLAG_PADDING                   (1<<7)
#define TLVFLAG_AUTH_INFO                 (1<<8)
#define TLVFLAG_IPV4_INT_REACHABILITY     (1<<9)
#define TLVFLAG_NLPID                     (1<<10)
#define TLVFLAG_IPV4_EXT_REACHABILITY     (1<<11)
#define TLVFLAG_IPV4_ADDR                 (1<<12)
#define TLVFLAG_DYN_HOSTNAME              (1<<13)
#define TLVFLAG_IPV6_ADDR                 (1<<14)
#define TLVFLAG_IPV6_REACHABILITY         (1<<15)
#define TLVFLAG_TE_IS_NEIGHS              (1<<16)
#define TLVFLAG_TE_IPV4_REACHABILITY      (1<<17)
#define TLVFLAG_3WAY_HELLO                (1<<18)
#define TLVFLAG_TE_ROUTER_ID              (1<<19)
#define TLVFLAG_CHECKSUM                  (1<<20)
#define TLVFLAG_GRACEFUL_RESTART          (1<<21)
#define TLVFLAG_MT_ROUTER_INFORMATION     (1<<22)

void init_tlvs(struct tlvs *tlvs, uint32_t expected);
void free_tlvs(struct tlvs *tlvs);
int parse_tlvs(char *areatag, u_char *stream, int size, u_int32_t *expected,
	       u_int32_t *found, struct tlvs *tlvs, u_int32_t *auth_tlv_offset);
int add_tlv(u_char, u_char, u_char *, struct stream *);
void free_tlv(void *val);

int tlv_add_mt_router_info(struct list *mt_router_info, struct stream *stream);
int tlv_add_area_addrs(struct list *area_addrs, struct stream *stream);
int tlv_add_is_neighs(struct list *is_neighs, struct stream *stream);
unsigned int tlv_add_te_is_neighs(struct list *te_is_neighs,
				  struct stream *stream, void *arg);
int tlv_add_lan_neighs(struct list *lan_neighs, struct stream *stream);
int tlv_add_nlpid(struct nlpids *nlpids, struct stream *stream);
int tlv_add_checksum(struct checksum *checksum, struct stream *stream);
int tlv_add_authinfo(u_char auth_type, u_char authlen, u_char *auth_value,
		     struct stream *stream);
int tlv_add_ip_addrs(struct list *ip_addrs, struct stream *stream);
int tlv_add_in_addr(struct in_addr *, struct stream *stream, u_char tag);
int tlv_add_dynamic_hostname(struct hostname *hostname, struct stream *stream);
int tlv_add_lsp_entries(struct list *lsps, struct stream *stream);
int tlv_add_ipv4_int_reachs(struct list *ipv4_reachs, struct stream *stream);
int tlv_add_ipv4_ext_reachs(struct list *ipv4_reachs, struct stream *stream);
unsigned int tlv_add_te_ipv4_reachs(struct list *te_ipv4_reachs,
				    struct stream *stream, void *arg);
int tlv_add_ipv6_addrs(struct list *ipv6_addrs, struct stream *stream);
unsigned int tlv_add_ipv6_reachs(struct list *ipv6_reachs,
				 struct stream *stream, void *arg);

int tlv_add_padding(struct stream *stream);

#endif /* _ZEBRA_ISIS_TLV_H */
Commit	Line	Data
eb5d44eb	1	/*
	2	* IS-IS Rout(e)ing protocol - isis_tlv.h
	3	* IS-IS TLV related routines
	4	*
	5	* Copyright (C) 2001,2002 Sampo Saaristo
d62a17ae	6	* Tampere University of Technology
eb5d44eb	7	* Institute of Communications Engineering
eb5d44eb	8	*
d62a17ae	9	* This program is free software; you can redistribute it and/or modify it
	10	* under the terms of the GNU General Public Licenseas published by the Free
	11	* Software Foundation; either version 2 of the License, or (at your option)
eb5d44eb	12	* any later version.
eb5d44eb	13	*
d62a17ae	14	* This program is distributed in the hope that it will be useful,but WITHOUT
	15	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	16	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
eb5d44eb	17	* more details.
eb5d44eb	18	*
896014f4 DL	19	* You should have received a copy of the GNU General Public License along
	20	* with this program; see the file COPYING; if not, write to the Free Software
	21	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
eb5d44eb	22	*/
	23
	24	#ifndef _ZEBRA_ISIS_TLV_H
	25	#define _ZEBRA_ISIS_TLV_H
	26
99894f9a CF	27	#include "isisd/isis_mt.h"
99894f9a CF	28
eb5d44eb	29	/*
72b9c956	30	* The list of TLVs we (should) support.
	31	* ____________________________________________________________________________
	32	* Name Value IIH LSP SNP Status
	33	* LAN
	34	* ____________________________________________________________________________
3f045a08	35	*
72b9c956	36	* Area Addresses 1 y y n ISO10589
	37	* IIS Neighbors 2 n y n ISO10589
	38	* ES Neighbors 3 n y n ISO10589
	39	* IIS Neighbors 6 y n n ISO10589
	40	* Padding 8 y n n ISO10589
	41	* LSP Entries 9 n n y ISO10589
	42	* Authentication 10 y y y ISO10589, RFC3567
	43	* Checksum 12 y n y RFC3358
f8c06e2c	44	* Extended IS Reachability 22 n y n RFC5305
72b9c956	45	* IS Alias 24 n y n RFC3786
	46	* IP Int. Reachability 128 n y n RFC1195
	47	* Protocols Supported 129 y y n RFC1195
	48	* IP Ext. Reachability 130 n y n RFC1195
	49	* IDRPI 131 n y y RFC1195
	50	* IP Interface Address 132 y y n RFC1195
3f045a08 JB	51	* TE Router ID 134 n y n RFC5305
3f045a08 JB	52	* Extended IP Reachability 135 n y n RFC5305
72b9c956	53	* Dynamic Hostname 137 n y n RFC2763
3f045a08	54	* Shared Risk Link Group 138 n y y RFC5307
f8c06e2c	55	* Inter-AS Reachability 141 n y n RFC5316
72b9c956	56	* Restart TLV 211 y n n RFC3847
3f045a08 JB	57	* MT IS Reachability 222 n y n RFC5120
	58	* MT Supported 229 y y n RFC5120
	59	* IPv6 Interface Address 232 y y n RFC5308
	60	* MT IP Reachability 235 n y n RFC5120
	61	* IPv6 IP Reachability 236 n y n RFC5308
	62	* MT IPv6 IP Reachability 237 n y n RFC5120
72b9c956	63	* P2P Adjacency State 240 y n n RFC3373
72b9c956	64	* IIH Sequence Number 241 y n n draft-shen-isis-iih-sequence
f8c06e2c	65	* Router Capability 242 n y n RFC4971
72b9c956	66	*
3f045a08	67	*
f8c06e2c	68	* IS Reachability sub-TLVs we support (See isis_te.[c,h])
72b9c956	69	* ____________________________________________________________________________
	70	* Name Value Status
	71	* ____________________________________________________________________________
3f045a08 JB	72	* Administartive group (color) 3 RFC5305
	73	* Link Local/Remote Identifiers 4 RFC5307
	74	* IPv4 interface address 6 RFC5305
	75	* IPv4 neighbor address 8 RFC5305
	76	* Maximum link bandwidth 9 RFC5305
	77	* Reservable link bandwidth 10 RFC5305
	78	* Unreserved bandwidth 11 RFC5305
	79	* TE Default metric 18 RFC5305
	80	* Link Protection Type 20 RFC5307
	81	* Interface Switching Capability 21 RFC5307
f8c06e2c OD	82	* Remote AS number 24 RFC5316
f8c06e2c OD	83	* IPv4 Remote ASBR identifier 25 RFC5316
3f045a08	84	*
72b9c956	85	*
72b9c956	86	* IP Reachability sub-TLVs we (should) support.
	87	* ____________________________________________________________________________
	88	* Name Value Status
	89	* ____________________________________________________________________________
3f045a08 JB	90	* 32bit administrative tag 1 RFC5130
	91	* 64bit administrative tag 2 RFC5130
	92	* Management prefix color 117 RFC5120
eb5d44eb	93	*/
	94
	95	#define AREA_ADDRESSES 1
	96	#define IS_NEIGHBOURS 2
	97	#define ES_NEIGHBOURS 3
eb5d44eb	98	#define LAN_NEIGHBOURS 6
	99	#define PADDING 8
	100	#define LSP_ENTRIES 9
	101	#define AUTH_INFO 10
	102	#define CHECKSUM 12
	103	#define TE_IS_NEIGHBOURS 22
72b9c956	104	#define IS_ALIAS 24
eb5d44eb	105	#define IPV4_INT_REACHABILITY 128
eb5d44eb	106	#define PROTOCOLS_SUPPORTED 129
72b9c956	107	#define IPV4_EXT_REACHABILITY 130
eb5d44eb	108	#define IDRP_INFO 131
	109	#define IPV4_ADDR 132
	110	#define TE_ROUTER_ID 134
	111	#define TE_IPV4_REACHABILITY 135
	112	#define DYNAMIC_HOSTNAME 137
00995cfc	113	#define GRACEFUL_RESTART 211
206f4aae	114	#define MT_IS_NEIGHBOURS 222
99894f9a	115	#define MT_ROUTER_INFORMATION 229
eb5d44eb	116	#define IPV6_ADDR 232
c3ae3127	117	#define MT_IPV4_REACHABILITY 235
72b9c956	118	#define IPV6_REACHABILITY 236
c3ae3127	119	#define MT_IPV6_REACHABILITY 237
eb5d44eb	120	#define WAY3_HELLO 240
f8c06e2c	121	#define ROUTER_INFORMATION 242
eb5d44eb	122
3f045a08 JB	123	#define AUTH_INFO_HDRLEN 3
3f045a08 JB	124
e316f9ab CF	125	#define MAX_TLV_LEN 255
e316f9ab CF	126
eb5d44eb	127	#define IS_NEIGHBOURS_LEN (ISIS_SYS_ID_LEN + 5)
eb5d44eb	128	#define LAN_NEIGHBOURS_LEN 6
f390d2c7	129	#define LSP_ENTRIES_LEN (10 + ISIS_SYS_ID_LEN) /* FIXME: should be entry */
eb5d44eb	130	#define IPV4_REACH_LEN 12
eb5d44eb	131	#define IPV6_REACH_LEN 22
3f045a08	132	#define TE_IPV4_REACH_LEN 9
eb5d44eb	133
f8c06e2c OD	134	#define MAX_SUBTLV_SIZE 256
f8c06e2c OD	135
eb5d44eb	136	/* struct for neighbor */
d62a17ae	137	struct is_neigh {
	138	struct metric metrics;
	139	u_char neigh_id[ISIS_SYS_ID_LEN + 1];
eb5d44eb	140	};
eb5d44eb	141
f8c06e2c	142	/* struct for te metric */
d62a17ae	143	struct te_is_neigh {
	144	u_char neigh_id[ISIS_SYS_ID_LEN + 1];
	145	u_char te_metric[3];
	146	u_char sub_tlvs_length;
	147	/* Theorical Maximum SubTLVs is 256 because the sub_tlvs_length is 8
	148	* bits */
	149	/* Practically, 118 bytes are necessary to store all supported TE
	150	* parameters */
	151	/* FIXME: A pointer will use less memory, but need to be free */
	152	/* which is hard to fix, especially within free_tlvs() function */
	153	/* and malloc() / free() as a CPU cost compared to the memory usage */
	154	u_char sub_tlvs[MAX_SUBTLV_SIZE]; /* SUB TLVs storage */
eb5d44eb	155	};
eb5d44eb	156
3f045a08	157	/* Decode and encode three-octet metric into host byte order integer */
d62a17ae	158	#define GET_TE_METRIC(t) \
	159	(((unsigned)(t)->te_metric[0] << 16) \| ((t)->te_metric[1] << 8) \
	160	\| (t)->te_metric[2])
	161	#define SET_TE_METRIC(t, m) \
	162	(((t)->te_metric[0] = (m) >> 16), ((t)->te_metric[1] = (m) >> 8), \
	163	((t)->te_metric[2] = (m)))
3f045a08	164
eb5d44eb	165	/* struct for es neighbors */
d62a17ae	166	struct es_neigh {
	167	struct metric metrics;
	168	/* approximate position of first, we use the
	169	* length ((uchar)metric-1) to know all /
	170	u_char first_es_neigh[ISIS_SYS_ID_LEN];
eb5d44eb	171	};
eb5d44eb	172
d62a17ae	173	struct partition_desig_level2_is {
d62a17ae	174	struct list *isis_system_ids;
eb5d44eb	175	};
	176
	177	/* struct for lan neighbors */
d62a17ae	178	struct lan_neigh {
d62a17ae	179	u_char LAN_addr[6];
eb5d44eb	180	};
eb5d44eb	181
238497fc PJ	182	#ifdef __SUNPRO_C
	183	#pragma pack(1)
	184	#endif
	185
eb5d44eb	186	/* struct for LSP entry */
d62a17ae	187	struct lsp_entry {
	188	u_int16_t rem_lifetime;
	189	u_char lsp_id[ISIS_SYS_ID_LEN + 2];
	190	u_int32_t seq_num;
	191	u_int16_t checksum;
	192	} __attribute__((packed));
eb5d44eb	193
238497fc PJ	194	#ifdef __SUNPRO_C
	195	#pragma pack()
	196	#endif
	197
eb5d44eb	198	/* struct for checksum */
d62a17ae	199	struct checksum {
d62a17ae	200	u_int16_t checksum;
eb5d44eb	201	};
	202
	203	/* ipv4 reachability */
d62a17ae	204	struct ipv4_reachability {
	205	struct metric metrics;
	206	struct in_addr prefix;
	207	struct in_addr mask;
eb5d44eb	208	};
	209
	210	/* te router id */
d62a17ae	211	struct te_router_id {
d62a17ae	212	struct in_addr id;
eb5d44eb	213	};
	214
	215	/* te ipv4 reachability */
d62a17ae	216	struct te_ipv4_reachability {
	217	u_int32_t te_metric;
	218	u_char control;
	219	u_char prefix_start; /* since this is variable length by nature it only
	220	*/
	221	}; /* points to an approximate location */
eb5d44eb	222
0de64cbb	223	#define TE_IPV4_HAS_SUBTLV (0x40)
eb5d44eb	224
d62a17ae	225	struct idrp_info {
	226	u_char len;
	227	u_char *value;
eb5d44eb	228	};
eb5d44eb	229
d62a17ae	230	struct ipv6_reachability {
	231	u_int32_t metric;
	232	u_char control_info;
	233	u_char prefix_len;
	234	u_char prefix[16];
eb5d44eb	235	};
eb5d44eb	236
	237	/* bits in control_info */
	238	#define CTRL_INFO_DIRECTION 0x80
f3ccedaa CF	239	#define DIRECTION_UP 0x00
	240	#define DIRECTION_DOWN 0x80
	241
eb5d44eb	242	#define CTRL_INFO_DISTRIBUTION 0x40
f3ccedaa CF	243	#define DISTRIBUTION_INTERNAL 0x00
	244	#define DISTRIBUTION_EXTERNAL 0x40
	245
eb5d44eb	246	#define CTRL_INFO_SUBTLVS 0x20
eb5d44eb	247
d62a17ae	248	struct mt_router_info {
	249	ISIS_MT_INFO_FIELDS
	250	bool overload;
99894f9a CF	251	};
99894f9a CF	252
eb5d44eb	253	/*
	254	* Pointer to each tlv type, filled by parse_tlvs()
	255	*/
d62a17ae	256	struct tlvs {
	257	struct checksum *checksum;
	258	struct hostname *hostname;
	259	struct nlpids *nlpids;
	260	struct te_router_id *router_id;
	261	struct list *area_addrs;
	262	struct list *mt_router_info;
	263	struct list *is_neighs;
	264	struct list *te_is_neighs;
	265	struct list *mt_is_neighs;
	266	struct list *es_neighs;
	267	struct list *lsp_entries;
	268	struct list *prefix_neighs;
	269	struct list *lan_neighs;
	270	struct list *ipv4_addrs;
	271	struct list *ipv4_int_reachs;
	272	struct list *ipv4_ext_reachs;
	273	struct list *te_ipv4_reachs;
	274	struct list *mt_ipv4_reachs;
	275	struct list *ipv6_addrs;
	276	struct list *ipv6_reachs;
	277	struct list *mt_ipv6_reachs;
	278	struct isis_passwd auth_info;
eb5d44eb	279	};
	280
	281	/*
	282	* Own definitions - used to bitmask found and expected
	283	*/
	284
	285	#define TLVFLAG_AREA_ADDRS (1<<0)
	286	#define TLVFLAG_IS_NEIGHS (1<<1)
	287	#define TLVFLAG_ES_NEIGHS (1<<2)
	288	#define TLVFLAG_PARTITION_DESIG_LEVEL2_IS (1<<3)
	289	#define TLVFLAG_PREFIX_NEIGHS (1<<4)
	290	#define TLVFLAG_LAN_NEIGHS (1<<5)
	291	#define TLVFLAG_LSP_ENTRIES (1<<6)
	292	#define TLVFLAG_PADDING (1<<7)
	293	#define TLVFLAG_AUTH_INFO (1<<8)
	294	#define TLVFLAG_IPV4_INT_REACHABILITY (1<<9)
	295	#define TLVFLAG_NLPID (1<<10)
	296	#define TLVFLAG_IPV4_EXT_REACHABILITY (1<<11)
	297	#define TLVFLAG_IPV4_ADDR (1<<12)
	298	#define TLVFLAG_DYN_HOSTNAME (1<<13)
	299	#define TLVFLAG_IPV6_ADDR (1<<14)
	300	#define TLVFLAG_IPV6_REACHABILITY (1<<15)
	301	#define TLVFLAG_TE_IS_NEIGHS (1<<16)
	302	#define TLVFLAG_TE_IPV4_REACHABILITY (1<<17)
	303	#define TLVFLAG_3WAY_HELLO (1<<18)
	304	#define TLVFLAG_TE_ROUTER_ID (1<<19)
	305	#define TLVFLAG_CHECKSUM (1<<20)
00995cfc	306	#define TLVFLAG_GRACEFUL_RESTART (1<<21)
99894f9a	307	#define TLVFLAG_MT_ROUTER_INFORMATION (1<<22)
eb5d44eb	308
d62a17ae	309	void init_tlvs(struct tlvs *tlvs, uint32_t expected);
	310	void free_tlvs(struct tlvs *tlvs);
	311	int parse_tlvs(char areatag, u_char stream, int size, u_int32_t *expected,
	312	u_int32_t found, struct tlvs tlvs, u_int32_t *auth_tlv_offset);
	313	int add_tlv(u_char, u_char, u_char , struct stream );
	314	void free_tlv(void *val);
	315
	316	int tlv_add_mt_router_info(struct list mt_router_info, struct stream stream);
	317	int tlv_add_area_addrs(struct list area_addrs, struct stream stream);
	318	int tlv_add_is_neighs(struct list is_neighs, struct stream stream);
	319	unsigned int tlv_add_te_is_neighs(struct list *te_is_neighs,
	320	struct stream stream, void arg);
	321	int tlv_add_lan_neighs(struct list lan_neighs, struct stream stream);
	322	int tlv_add_nlpid(struct nlpids nlpids, struct stream stream);
	323	int tlv_add_checksum(struct checksum checksum, struct stream stream);
	324	int tlv_add_authinfo(u_char auth_type, u_char authlen, u_char *auth_value,
	325	struct stream *stream);
	326	int tlv_add_ip_addrs(struct list ip_addrs, struct stream stream);
	327	int tlv_add_in_addr(struct in_addr , struct stream stream, u_char tag);
	328	int tlv_add_dynamic_hostname(struct hostname hostname, struct stream stream);
	329	int tlv_add_lsp_entries(struct list lsps, struct stream stream);
	330	int tlv_add_ipv4_int_reachs(struct list ipv4_reachs, struct stream stream);
	331	int tlv_add_ipv4_ext_reachs(struct list ipv4_reachs, struct stream stream);
	332	unsigned int tlv_add_te_ipv4_reachs(struct list *te_ipv4_reachs,
	333	struct stream stream, void arg);
	334	int tlv_add_ipv6_addrs(struct list ipv6_addrs, struct stream stream);
	335	unsigned int tlv_add_ipv6_reachs(struct list *ipv6_reachs,
	336	struct stream stream, void arg);
	337
	338	int tlv_add_padding(struct stream *stream);
eb5d44eb	339
eb5d44eb	340	#endif /* _ZEBRA_ISIS_TLV_H */