| /* |
| * 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 |
| * 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 IPV6_ADDR 232 |
| #define IPV6_REACHABILITY 236 |
| #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 */ |
| |
| |
| |
| 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 */ |