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Diffstat (limited to 'isisd/isis_tlv.h')
| -rw-r--r-- | isisd/isis_tlv.h | 268 |
1 files changed, 268 insertions, 0 deletions
diff --git a/isisd/isis_tlv.h b/isisd/isis_tlv.h new file mode 100644 index 00000000..79c0c46f --- /dev/null +++ b/isisd/isis_tlv.h @@ -0,0 +1,268 @@ +/* + * 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 + +/* + * Structures found in TLV's. + * this header is fully complient with + * draft-ietf-isis-wg-tlv-codepoints-02.txt + 1. TLV Codepoints reserved + ____________________________________________________ + Name Value IIH LSP SNP Status + ____________________________________________________ + + Area Addresses 1 y y n ISO 10589 + IIS Neighbors 2 n y n ISO 10589 + ES Neighbors 3 n y n ISO 10589 + Part. DIS 4 n y n ISO 10589 + Prefix Neighbors 5 n y n ISO 10589 + IIS Neighbors 6 y n n ISO 10589 + Padding 8 y n n ISO 10589 + LSP Entries 9 n n y ISO 10589 + Authentication 10 y y y ISO 10589 + Opt. Checksum 12 y n y IETF-draft + LSPBufferSize 14 n y n ISO 10589 Rev 2 Draft + TE IIS Neigh. 22 n y n IETF-draft + DECnet Phase IV 42 y n n DEC (ancient) + IP Int. Reach 128 n y n RFC 1195 + Prot. Supported 129 y y n RFC 1195 + IP Ext. Address 130 n y n RFC 1195 + IDRPI 131 n y y RFC 1195 + IP Intf. Address 132 y y n RFC 1195 + Illegal 133 n n n RFC 1195 (not used) + Router ID 134 n y n IETF-draft + TE IP. Reach 135 n y n IETF-draft + Dynamic Name 137 n y n RFC 2763 + Nortel Proprietary 176 n y n + Nortel Proprietary 177 n y n + Restart TLV 211 y n n IETF-draft + MT-ISN 222 n y n IETF-draft + M-Topologies 229 y y n IETF-draft + IPv6 Intf. Addr. 232 y y n IETF-draft + MT IP. Reach 235 n y n IETF-draft + IPv6 IP. Reach 236 n y n IETF-draft + MT IPv6 IP. Reach 237 n y n IETF-draft + P2P Adjacency State 240 y n n IETF-draft + + */ + +#define AREA_ADDRESSES 1 +#define IS_NEIGHBOURS 2 +#define ES_NEIGHBOURS 3 +#define PARTITION_DESIG_LEVEL2_IS 4 +#define PREFIX_NEIGHBOURS 5 +#define LAN_NEIGHBOURS 6 +#define PADDING 8 +#define LSP_ENTRIES 9 +#define AUTH_INFO 10 +#define CHECKSUM 12 +#define TE_IS_NEIGHBOURS 22 +#define IPV4_INT_REACHABILITY 128 +#define IPV4_EXT_REACHABILITY 130 +#define PROTOCOLS_SUPPORTED 129 +#define IDRP_INFO 131 +#define IPV4_ADDR 132 +#define TE_ROUTER_ID 134 +#define TE_IPV4_REACHABILITY 135 +#define DYNAMIC_HOSTNAME 137 +#define IPV6_REACHABILITY 236 +#define IPV6_ADDR 232 +#define WAY3_HELLO 240 + +#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 + +/* 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; +}; + +/* 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]; +}; + +/* 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)); + +/* 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]; +}; +#endif /* HAVE_IPV6 */ + +/* bits in control_info */ +#define CTRL_INFO_DIRECTION 0x80 +#define DIRECTION_UP 0 +#define DIRECTION_DOWN 1 +#define CTRL_INFO_DISTRIBUTION 0x40 +#define DISTRIBUTION_INTERNAL 0 +#define DISTRIBUTION_EXTERNAL 1 +#define CTRL_INFO_SUBTLVS 0x20 + +/* + * Pointer to each tlv type, filled by parse_tlvs() + */ +struct tlvs { + 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 checksum *checksum; + struct nlpids *nlpids; + struct list *ipv4_addrs; + struct list *ipv4_int_reachs; + struct list *ipv4_ext_reachs; + struct list *te_ipv4_reachs; + struct hostname *hostname; + struct te_router_id *router_id; +#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) + +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); +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_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 (char auth_type, char authlen, char *auth_value, + struct stream *stream); +int tlv_add_ip_addrs (struct list *ip_addrs, struct stream *stream); +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_reachs (struct list *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 */ + + + |