Annotation of embedaddon/quagga/isisd/isis_tlv.h, revision 1.1
1.1 ! misho 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
! 6: * Tampere University of Technology
! 7: * Institute of Communications Engineering
! 8: *
! 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)
! 12: * any later version.
! 13: *
! 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
! 17: * more details.
! 18: *
! 19: * You should have received a copy of the GNU General Public License along
! 20: * with this program; if not, write to the Free Software Foundation, Inc.,
! 21: * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
! 22: */
! 23:
! 24: #ifndef _ZEBRA_ISIS_TLV_H
! 25: #define _ZEBRA_ISIS_TLV_H
! 26:
! 27: /*
! 28: * The list of TLVs we (should) support.
! 29: * ____________________________________________________________________________
! 30: * Name Value IIH LSP SNP Status
! 31: * LAN
! 32: * ____________________________________________________________________________
! 33: *
! 34: * Area Addresses 1 y y n ISO10589
! 35: * IIS Neighbors 2 n y n ISO10589
! 36: * ES Neighbors 3 n y n ISO10589
! 37: * IIS Neighbors 6 y n n ISO10589
! 38: * Padding 8 y n n ISO10589
! 39: * LSP Entries 9 n n y ISO10589
! 40: * Authentication 10 y y y ISO10589, RFC3567
! 41: * Checksum 12 y n y RFC3358
! 42: * TE IS Reachability 22 n y n RFC3784
! 43: * IS Alias 24 n y n RFC3786
! 44: * IP Int. Reachability 128 n y n RFC1195
! 45: * Protocols Supported 129 y y n RFC1195
! 46: * IP Ext. Reachability 130 n y n RFC1195
! 47: * IDRPI 131 n y y RFC1195
! 48: * IP Interface Address 132 y y n RFC1195
! 49: * TE Router ID 134 n y n RFC3784
! 50: * Extended IP Reachability 135 n y n RFC3784
! 51: * Dynamic Hostname 137 n y n RFC2763
! 52: * Shared Risk Link Group 138 n y y draft-ietf-isis-gmpls-extensions
! 53: * Restart TLV 211 y n n RFC3847
! 54: * MT IS Reachability 222 n y n draft-ietf-isis-wg-multi-topology
! 55: * MT Supported 229 y y n draft-ietf-isis-wg-multi-topology
! 56: * IPv6 Interface Address 232 y y n draft-ietf-isis_ipv6
! 57: * MT IP Reachability 235 n y n draft-ietf-isis-wg-multi-topology
! 58: * IPv6 IP Reachability 236 n y n draft-ietf-isis_ipv6
! 59: * MT IPv6 IP Reachability 237 n y n draft-ietf-isis-wg-multi-topology
! 60: * P2P Adjacency State 240 y n n RFC3373
! 61: * IIH Sequence Number 241 y n n draft-shen-isis-iih-sequence
! 62: * Router Capability 242 - - - draft-ietf-isis-caps
! 63: *
! 64: *
! 65: * IS Reachability sub-TLVs we (should) support.
! 66: * ____________________________________________________________________________
! 67: * Name Value Status
! 68: * ____________________________________________________________________________
! 69: * Administartive group (color) 3 RFC3784
! 70: * Link Local/Remote Identifiers 4 draft-ietf-isis-gmpls-extensions
! 71: * IPv4 interface address 6 RFC3784
! 72: * IPv4 neighbor address 8 RFC3784
! 73: * Maximum link bandwidth 9 RFC3784
! 74: * Reservable link bandwidth 10 RFC3784
! 75: * Unreserved bandwidth 11 RFC3784
! 76: * TE Default metric 18 RFC3784
! 77: * Link Protection Type 20 draft-ietf-isis-gmpls-extensions
! 78: * Interface Switching Capability 21 draft-ietf-isis-gmpls-extensions
! 79: *
! 80: *
! 81: * IP Reachability sub-TLVs we (should) support.
! 82: * ____________________________________________________________________________
! 83: * Name Value Status
! 84: * ____________________________________________________________________________
! 85: * 32bit administrative tag 1 draft-ietf-isis-admin-tags
! 86: * 64bit administrative tag 2 draft-ietf-isis-admin-tags
! 87: * Management prefix color 117 draft-ietf-isis-wg-multi-topology
! 88: */
! 89:
! 90: #define AREA_ADDRESSES 1
! 91: #define IS_NEIGHBOURS 2
! 92: #define ES_NEIGHBOURS 3
! 93: #define LAN_NEIGHBOURS 6
! 94: #define PADDING 8
! 95: #define LSP_ENTRIES 9
! 96: #define AUTH_INFO 10
! 97: #define CHECKSUM 12
! 98: #define TE_IS_NEIGHBOURS 22
! 99: #define IS_ALIAS 24
! 100: #define IPV4_INT_REACHABILITY 128
! 101: #define PROTOCOLS_SUPPORTED 129
! 102: #define IPV4_EXT_REACHABILITY 130
! 103: #define IDRP_INFO 131
! 104: #define IPV4_ADDR 132
! 105: #define TE_ROUTER_ID 134
! 106: #define TE_IPV4_REACHABILITY 135
! 107: #define DYNAMIC_HOSTNAME 137
! 108: #define GRACEFUL_RESTART 211
! 109: #define IPV6_ADDR 232
! 110: #define IPV6_REACHABILITY 236
! 111: #define WAY3_HELLO 240
! 112:
! 113: #define IS_NEIGHBOURS_LEN (ISIS_SYS_ID_LEN + 5)
! 114: #define LAN_NEIGHBOURS_LEN 6
! 115: #define LSP_ENTRIES_LEN (10 + ISIS_SYS_ID_LEN) /* FIXME: should be entry */
! 116: #define IPV4_REACH_LEN 12
! 117: #define IPV6_REACH_LEN 22
! 118:
! 119: /* struct for neighbor */
! 120: struct is_neigh
! 121: {
! 122: struct metric metrics;
! 123: u_char neigh_id[ISIS_SYS_ID_LEN + 1];
! 124: };
! 125:
! 126: /* struct for te is neighbor */
! 127: struct te_is_neigh
! 128: {
! 129: u_char neigh_id[ISIS_SYS_ID_LEN + 1];
! 130: u_char te_metric[3];
! 131: u_char sub_tlvs_length;
! 132: };
! 133:
! 134: /* struct for es neighbors */
! 135: struct es_neigh
! 136: {
! 137: struct metric metrics;
! 138: /* approximate position of first, we use the
! 139: * length ((uchar*)metric-1) to know all */
! 140: u_char first_es_neigh[ISIS_SYS_ID_LEN];
! 141:
! 142: };
! 143:
! 144: struct partition_desig_level2_is
! 145: {
! 146: struct list *isis_system_ids;
! 147: };
! 148:
! 149: /* struct for lan neighbors */
! 150: struct lan_neigh
! 151: {
! 152: u_char LAN_addr[6];
! 153: };
! 154:
! 155: #ifdef __SUNPRO_C
! 156: #pragma pack(1)
! 157: #endif
! 158:
! 159: /* struct for LSP entry */
! 160: struct lsp_entry
! 161: {
! 162: u_int16_t rem_lifetime;
! 163: u_char lsp_id[ISIS_SYS_ID_LEN + 2];
! 164: u_int32_t seq_num;
! 165: u_int16_t checksum;
! 166: } __attribute__ ((packed));
! 167:
! 168: #ifdef __SUNPRO_C
! 169: #pragma pack()
! 170: #endif
! 171:
! 172: /* struct for checksum */
! 173: struct checksum
! 174: {
! 175: u_int16_t checksum;
! 176: };
! 177:
! 178: /* ipv4 reachability */
! 179: struct ipv4_reachability
! 180: {
! 181: struct metric metrics;
! 182: struct in_addr prefix;
! 183: struct in_addr mask;
! 184: };
! 185:
! 186: /* te router id */
! 187: struct te_router_id
! 188: {
! 189: struct in_addr id;
! 190: };
! 191:
! 192: /* te ipv4 reachability */
! 193: struct te_ipv4_reachability
! 194: {
! 195: u_int32_t te_metric;
! 196: u_char control;
! 197: u_char prefix_start; /* since this is variable length by nature it only */
! 198: }; /* points to an approximate location */
! 199:
! 200:
! 201:
! 202: struct idrp_info
! 203: {
! 204: u_char len;
! 205: u_char *value;
! 206: };
! 207:
! 208: #ifdef HAVE_IPV6
! 209: struct ipv6_reachability
! 210: {
! 211: u_int32_t metric;
! 212: u_char control_info;
! 213: u_char prefix_len;
! 214: u_char prefix[16];
! 215: };
! 216: #endif /* HAVE_IPV6 */
! 217:
! 218: /* bits in control_info */
! 219: #define CTRL_INFO_DIRECTION 0x80
! 220: #define DIRECTION_UP 0
! 221: #define DIRECTION_DOWN 1
! 222: #define CTRL_INFO_DISTRIBUTION 0x40
! 223: #define DISTRIBUTION_INTERNAL 0
! 224: #define DISTRIBUTION_EXTERNAL 1
! 225: #define CTRL_INFO_SUBTLVS 0x20
! 226:
! 227: /*
! 228: * Pointer to each tlv type, filled by parse_tlvs()
! 229: */
! 230: struct tlvs
! 231: {
! 232: struct list *area_addrs;
! 233: struct list *is_neighs;
! 234: struct list *te_is_neighs;
! 235: struct list *es_neighs;
! 236: struct list *lsp_entries;
! 237: struct list *prefix_neighs;
! 238: struct list *lan_neighs;
! 239: struct checksum *checksum;
! 240: struct nlpids *nlpids;
! 241: struct list *ipv4_addrs;
! 242: struct list *ipv4_int_reachs;
! 243: struct list *ipv4_ext_reachs;
! 244: struct list *te_ipv4_reachs;
! 245: struct hostname *hostname;
! 246: struct te_router_id *router_id;
! 247: #ifdef HAVE_IPV6
! 248: struct list *ipv6_addrs;
! 249: struct list *ipv6_reachs;
! 250: #endif
! 251: struct isis_passwd auth_info;
! 252: };
! 253:
! 254: /*
! 255: * Own definitions - used to bitmask found and expected
! 256: */
! 257:
! 258: #define TLVFLAG_AREA_ADDRS (1<<0)
! 259: #define TLVFLAG_IS_NEIGHS (1<<1)
! 260: #define TLVFLAG_ES_NEIGHS (1<<2)
! 261: #define TLVFLAG_PARTITION_DESIG_LEVEL2_IS (1<<3)
! 262: #define TLVFLAG_PREFIX_NEIGHS (1<<4)
! 263: #define TLVFLAG_LAN_NEIGHS (1<<5)
! 264: #define TLVFLAG_LSP_ENTRIES (1<<6)
! 265: #define TLVFLAG_PADDING (1<<7)
! 266: #define TLVFLAG_AUTH_INFO (1<<8)
! 267: #define TLVFLAG_IPV4_INT_REACHABILITY (1<<9)
! 268: #define TLVFLAG_NLPID (1<<10)
! 269: #define TLVFLAG_IPV4_EXT_REACHABILITY (1<<11)
! 270: #define TLVFLAG_IPV4_ADDR (1<<12)
! 271: #define TLVFLAG_DYN_HOSTNAME (1<<13)
! 272: #define TLVFLAG_IPV6_ADDR (1<<14)
! 273: #define TLVFLAG_IPV6_REACHABILITY (1<<15)
! 274: #define TLVFLAG_TE_IS_NEIGHS (1<<16)
! 275: #define TLVFLAG_TE_IPV4_REACHABILITY (1<<17)
! 276: #define TLVFLAG_3WAY_HELLO (1<<18)
! 277: #define TLVFLAG_TE_ROUTER_ID (1<<19)
! 278: #define TLVFLAG_CHECKSUM (1<<20)
! 279: #define TLVFLAG_GRACEFUL_RESTART (1<<21)
! 280:
! 281: void init_tlvs (struct tlvs *tlvs, uint32_t expected);
! 282: void free_tlvs (struct tlvs *tlvs);
! 283: int parse_tlvs (char *areatag, u_char * stream, int size,
! 284: u_int32_t * expected, u_int32_t * found, struct tlvs *tlvs);
! 285: void free_tlv (void *val);
! 286:
! 287: int tlv_add_area_addrs (struct list *area_addrs, struct stream *stream);
! 288: int tlv_add_is_neighs (struct list *is_neighs, struct stream *stream);
! 289: int tlv_add_te_is_neighs (struct list *te_is_neighs, struct stream *stream);
! 290: int tlv_add_lan_neighs (struct list *lan_neighs, struct stream *stream);
! 291: int tlv_add_nlpid (struct nlpids *nlpids, struct stream *stream);
! 292: int tlv_add_checksum (struct checksum *checksum, struct stream *stream);
! 293: int tlv_add_authinfo (char auth_type, char authlen, u_char *auth_value,
! 294: struct stream *stream);
! 295: int tlv_add_ip_addrs (struct list *ip_addrs, struct stream *stream);
! 296: int tlv_add_in_addr (struct in_addr *, struct stream *stream, u_char tag);
! 297: int tlv_add_dynamic_hostname (struct hostname *hostname,
! 298: struct stream *stream);
! 299: int tlv_add_lsp_entries (struct list *lsps, struct stream *stream);
! 300: int tlv_add_ipv4_reachs (struct list *ipv4_reachs, struct stream *stream);
! 301: int tlv_add_te_ipv4_reachs (struct list *te_ipv4_reachs, struct stream *stream);
! 302: #ifdef HAVE_IPV6
! 303: int tlv_add_ipv6_addrs (struct list *ipv6_addrs, struct stream *stream);
! 304: int tlv_add_ipv6_reachs (struct list *ipv6_reachs, struct stream *stream);
! 305: #endif /* HAVE_IPV6 */
! 306:
! 307: int tlv_add_padding (struct stream *stream);
! 308:
! 309: #endif /* _ZEBRA_ISIS_TLV_H */
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