/* * 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 * RFC 3359 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 RFC 3358 LSPBufferSize 14 n y n ISO 10589 Rev 2 Draft TE IIS Neigh. 22 n y n RFC 3784 IS Alias ID 24 n y n RFC 3786 DECnet Phase IV 42 y n n DEC (ancient) Lucent Proprietary 66 n y n 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 RFC 3784 TE IP. Reach 135 n y n RFC 3784 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 RFC 3847 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 RFC 3373 */ #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 GRACEFUL_RESTART 211 #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) #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); void free_tlv (void *val); int add_tlv (u_char, u_char, u_char *, struct 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); 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, u_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 */