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/*
* 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; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef _ZEBRA_ISIS_TLV_H
#define _ZEBRA_ISIS_TLV_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
* TE 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
* 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 - - - draft-ietf-isis-caps
*
*
* IS Reachability sub-TLVs we (should) support.
* ____________________________________________________________________________
* 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
*
*
* 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 IPV6_ADDR 232
#define IPV6_REACHABILITY 236
#define WAY3_HELLO 240
#define AUTH_INFO_HDRLEN 3
#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
/* struct for neighbor */
struct is_neigh
{
struct metric metrics;
u_char neigh_id[ISIS_SYS_ID_LEN + 1];
};
/* struct for te is neighbor */
struct te_is_neigh
{
u_char neigh_id[ISIS_SYS_ID_LEN + 1];
u_char te_metric[3];
u_char sub_tlvs_length;
};
/* 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 */
struct idrp_info
{
u_char len;
u_char *value;
};
#ifdef HAVE_IPV6
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
#endif /* HAVE_IPV6 */
/*
* 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 *is_neighs;
struct list *te_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;
#ifdef HAVE_IPV6
struct list *ipv6_addrs;
struct list *ipv6_reachs;
#endif
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)
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_area_addrs (struct list *area_addrs, struct stream *stream);
int tlv_add_is_neighs (struct list *is_neighs, struct stream *stream);
int tlv_add_te_is_neighs (struct list *te_is_neighs, struct stream *stream);
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);
int tlv_add_te_ipv4_reachs (struct list *te_ipv4_reachs, struct stream *stream);
#ifdef HAVE_IPV6
int tlv_add_ipv6_addrs (struct list *ipv6_addrs, struct stream *stream);
int tlv_add_ipv6_reachs (struct list *ipv6_reachs, struct stream *stream);
#endif /* HAVE_IPV6 */
int tlv_add_padding (struct stream *stream);
#endif /* _ZEBRA_ISIS_TLV_H */
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