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Diffstat (limited to 'isisd/isis_te.h')
| -rw-r--r-- | isisd/isis_te.h | 331 |
1 files changed, 331 insertions, 0 deletions
diff --git a/isisd/isis_te.h b/isisd/isis_te.h new file mode 100644 index 000000000..4cec1735a --- /dev/null +++ b/isisd/isis_te.h @@ -0,0 +1,331 @@ +/* + * IS-IS Rout(e)ing protocol - isis_te.c + * + * This is an implementation of RFC5305, RFC 5307 and draft-ietf-isis-te-metric-extensions-11 + * + * Copyright (C) 2014 Orange Labs + * http://www.orange.com + * + * This file is part of GNU Zebra. + * + * GNU Zebra is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2, or (at your option) any + * later version. + * + * GNU Zebra 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 GNU Zebra; see the file COPYING. If not, write to the Free + * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA + * 02111-1307, USA. + */ + +#ifndef _ZEBRA_ISIS_MPLS_TE_H +#define _ZEBRA_ISIS_MPLS_TE_H + +/* + * Traffic Engineering information are transport through LSP: + * - Extended IS Reachability TLV = 22 + * - Traffic Engineering Router ID TLV = 134 + * - Extended IP Reachability TLV = 135 + * - Inter-AS Reachability Information TLV = 141 + * + * and support following sub-TLV: + * + * 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 + * + */ + +/* NOTE: RFC5316 is not yet supported in this version */ + +/* Following define the type of TE link regarding the various RFC */ +#define STD_TE 0x01 +#define GMPLS 0x02 +#define INTER_AS 0x04 +#define FLOOD_L1 0x10 +#define FLOOD_L2 0x20 +#define FLOOD_AS 0x40 +#define EMULATED 0x80 + +#define IS_STD_TE(x) (x & STD_TE) +#define IS_INTER_AS(x) (x & INTER_AS) +#define IS_EMULATED(x) (x & EMULATED) +#define IS_FLOOD_L1(x) (x & FLOOD_L1) +#define IS_FLOOD_L2(x) (x & FLOOD_L2) +#define IS_FLOOD_AS(x) (x & FLOOD_AS) +#define IS_INTER_AS_EMU(x) (x & INTER_AS & EMULATED) +#define IS_INTER_AS_AS(x) (x & INTER_AS & FLOOD_AS) + +/* + * Following section defines subTLV (tag, length, value) structures, + * used for Traffic Engineering. + */ +struct subtlv_header +{ + u_char type; /* sub_TLV_XXX type (see above) */ + u_char length; /* Value portion only, in byte */ +}; + +#define SUBTLV_HDR_SIZE 2 /* (sizeof (struct sub_tlv_header)) */ + +#define SUBTLV_SIZE(stlvh) (SUBTLV_HDR_SIZE + (stlvh)->length) + +#define SUBTLV_HDR_TOP(lsph) (struct subtlv_header *)((char *)(lsph) + ISIS_LSP_HEADER_SIZE) + +#define SUBTLV_HDR_NEXT(stlvh) (struct subtlv_header *)((char *)(stlvh) + SUBTLV_SIZE(stlvh)) + +#define SUBTLV_TYPE(stlvh) stlvh.header.type +#define SUBTLV_LEN(stlvh) stlvh.header.length +#define SUBTLV_VAL(stlvh) stlvh.value +#define SUBTLV_DATA(stlvh) stlvh + SUBTLV_HDR_SIZE + +#define SUBTLV_DEF_SIZE 4 + +/* Link Sub-TLV: Resource Class/Color - RFC 5305 */ +#define TE_SUBTLV_ADMIN_GRP 3 +struct te_subtlv_admin_grp +{ + struct subtlv_header header; /* Value length is 4 octets. */ + u_int32_t value; /* Admin. group membership. */ +} __attribute__((__packed__)); + +/* Link Local/Remote Identifiers - RFC 5307 */ +#define TE_SUBTLV_LLRI 4 +#define TE_SUBTLV_LLRI_SIZE 8 +struct te_subtlv_llri +{ + struct subtlv_header header; /* Value length is 8 octets. */ + u_int32_t local; /* Link Local Identifier */ + u_int32_t remote; /* Link Remote Identifier */ +} __attribute__((__packed__)); + +/* Link Sub-TLV: Local Interface IP Address - RFC 5305 */ +#define TE_SUBTLV_LOCAL_IPADDR 6 +struct te_subtlv_local_ipaddr +{ + struct subtlv_header header; /* Value length is 4 x N octets. */ + struct in_addr value; /* Local IP address(es). */ +} __attribute__((__packed__)); + +/* Link Sub-TLV: Neighbor Interface IP Address - RFC 5305 */ +#define TE_SUBTLV_RMT_IPADDR 8 +struct te_subtlv_rmt_ipaddr +{ + struct subtlv_header header; /* Value length is 4 x N octets. */ + struct in_addr value; /* Neighbor's IP address(es). */ +} __attribute__((__packed__)); + +/* Link Sub-TLV: Maximum Bandwidth - RFC 5305 */ +#define TE_SUBTLV_MAX_BW 9 +struct te_subtlv_max_bw +{ + struct subtlv_header header; /* Value length is 4 octets. */ + float value; /* bytes/sec */ +} __attribute__((__packed__)); + +/* Link Sub-TLV: Maximum Reservable Bandwidth - RFC 5305 */ +#define TE_SUBTLV_MAX_RSV_BW 10 +struct te_subtlv_max_rsv_bw +{ + struct subtlv_header header; /* Value length is 4 octets. */ + float value; /* bytes/sec */ +} __attribute__((__packed__)); + +/* Link Sub-TLV: Unreserved Bandwidth - RFC 5305 */ +#define TE_SUBTLV_UNRSV_BW 11 +#define TE_SUBTLV_UNRSV_SIZE 32 +struct te_subtlv_unrsv_bw +{ + struct subtlv_header header; /* Value length is 32 octets. */ + float value[8]; /* One for each priority level. */ +} __attribute__((__packed__)); + +/* Link Sub-TLV: Traffic Engineering Metric - RFC 5305 */ +#define TE_SUBTLV_TE_METRIC 18 +#define TE_SUBTLV_TE_METRIC_SIZE 3 +struct te_subtlv_te_metric +{ + struct subtlv_header header; /* Value length is 4 octets. */ + u_char value[3]; /* Link metric for TE purpose. */ +} __attribute__((__packed__)); + +/* Remote AS Number sub-TLV - RFC5316 */ +#define TE_SUBTLV_RAS 24 +struct te_subtlv_ras +{ + struct subtlv_header header; /* Value length is 4 octets. */ + u_int32_t value; /* Remote AS number */ +} __attribute__((__packed__)); + +/* IPv4 Remote ASBR ID Sub-TLV - RFC5316 */ +#define TE_SUBTLV_RIP 25 +struct te_subtlv_rip +{ + struct subtlv_header header; /* Value length is 4 octets. */ + struct in_addr value; /* Remote ASBR IP address */ +} __attribute__((__packed__)); + + +/* draft-ietf-isis-te-metric-extensions-11.txt */ +/* Link Sub-TLV: Average Link Delay */ +#define TE_SUBTLV_AV_DELAY 33 +struct te_subtlv_av_delay +{ + struct subtlv_header header; /* Value length is 4 bytes. */ + u_int32_t value; /* Average delay in micro-seconds only 24 bits => 0 ... 16777215 + with Anomalous Bit (A) as Upper most bit */ +} __attribute__((__packed__)); + +/* Link Sub-TLV: Low/High Link Delay */ +#define TE_SUBTLV_MM_DELAY 34 +#define TE_SUBTLV_MM_DELAY_SIZE 8 +struct te_subtlv_mm_delay +{ + struct subtlv_header header; /* Value length is 8 bytes. */ + u_int32_t low; /* low delay in micro-seconds only 24 bits => 0 ... 16777215 + with Anomalous Bit (A) as Upper most bit */ + u_int32_t high; /* high delay in micro-seconds only 24 bits => 0 ... 16777215 */ +} __attribute__((__packed__)); + +/* Link Sub-TLV: Link Delay Variation i.e. Jitter */ +#define TE_SUBTLV_DELAY_VAR 35 +struct te_subtlv_delay_var +{ + struct subtlv_header header; /* Value length is 4 bytes. */ + u_int32_t value; /* interval in micro-seconds only 24 bits => 0 ... 16777215 */ +} __attribute__((__packed__)); + +/* Link Sub-TLV: Routine Unidirectional Link Packet Loss */ +#define TE_SUBTLV_PKT_LOSS 36 +struct te_subtlv_pkt_loss +{ + struct subtlv_header header; /* Value length is 4 bytes. */ + u_int32_t value; /* in percentage of total traffic only 24 bits (2^24 - 2) + with Anomalous Bit (A) as Upper most bit */ +} __attribute__((__packed__)); + +/* Link Sub-TLV: Unidirectional Residual Bandwidth */ /* Optional */ +#define TE_SUBTLV_RES_BW 37 +struct te_subtlv_res_bw +{ + struct subtlv_header header; /* Value length is 4 bytes. */ + float value; /* bandwidth in IEEE floating point format with units in bytes per second */ +} __attribute__((__packed__)); + +/* Link Sub-TLV: Unidirectional Available Bandwidth */ /* Optional */ +#define TE_SUBTLV_AVA_BW 38 +struct te_subtlv_ava_bw +{ + struct subtlv_header header; /* Value length is 4 octets. */ + float value; /* bandwidth in IEEE floating point format with units in bytes per second */ +} __attribute__((__packed__)); + +/* Link Sub-TLV: Unidirectional Utilized Bandwidth */ /* Optional */ +#define TE_SUBTLV_USE_BW 39 +struct te_subtlv_use_bw +{ + struct subtlv_header header; /* Value length is 4 octets. */ + float value; /* bandwidth in IEEE floating point format with units in bytes per second */ +} __attribute__((__packed__)); + +#define TE_SUBTLV_MAX 40 /* Last SUBTLV + 1 */ + +/* Following declaration concerns the MPLS-TE and LINk-TE management */ +typedef enum _status_t { disable, enable, learn } status_t; + +/* Mode for Inter-AS LSP */ /* TODO: Check how if LSP is flooded in RFC5316 */ +typedef enum _interas_mode_t { off, region, as, emulate } interas_mode_t; + +#define IS_MPLS_TE(m) (m.status == enable) +#define IS_CIRCUIT_TE(c) (c->status == enable) + +/* Following structure are internal use only. */ +struct isis_mpls_te +{ + /* Status of MPLS-TE: enable or disable */ + status_t status; + + /* L1, L1-L2, L2-Only */ + u_int8_t level; + + /* RFC5316 */ + interas_mode_t inter_as; + struct in_addr interas_areaid; + + /* Circuit list on which TE are enable */ + struct list *cir_list; + + /* MPLS_TE router ID */ + struct in_addr router_id; +}; + +extern struct isis_mpls_te isisMplsTE; + +struct mpls_te_circuit +{ + + /* Status of MPLS-TE on this interface */ + status_t status; + + /* Type of MPLS-TE circuit: STD_TE(RFC5305), INTER_AS(RFC5316), INTER_AS_EMU(RFC5316 emulated) */ + u_int8_t type; + + /* Total size of sub_tlvs */ + u_char length; + + /* Store subTLV in network byte order. */ + /* RFC5305 */ + struct te_subtlv_admin_grp admin_grp; + /* RFC5307 */ + struct te_subtlv_llri llri; + /* RFC5305 */ + struct te_subtlv_local_ipaddr local_ipaddr; + struct te_subtlv_rmt_ipaddr rmt_ipaddr; + struct te_subtlv_max_bw max_bw; + struct te_subtlv_max_rsv_bw max_rsv_bw; + struct te_subtlv_unrsv_bw unrsv_bw; + struct te_subtlv_te_metric te_metric; + /* RFC5316 */ + struct te_subtlv_ras ras; + struct te_subtlv_rip rip; + /* draft-ietf-isis-te-metric-extension */ + struct te_subtlv_av_delay av_delay; + struct te_subtlv_mm_delay mm_delay; + struct te_subtlv_delay_var delay_var; + struct te_subtlv_pkt_loss pkt_loss; + struct te_subtlv_res_bw res_bw; + struct te_subtlv_ava_bw ava_bw; + struct te_subtlv_use_bw use_bw; +}; + +/* Prototypes. */ +void isis_mpls_te_init (void); +struct mpls_te_circuit *mpls_te_circuit_new(void); +void mpls_te_print_detail(struct vty *, struct te_is_neigh *); +void set_circuitparams_local_ipaddr (struct mpls_te_circuit *, struct in_addr); +void set_circuitparams_rmt_ipaddr (struct mpls_te_circuit *, struct in_addr); +u_char subtlvs_len (struct mpls_te_circuit *); +u_char add_te_subtlvs(u_char *, struct mpls_te_circuit *); +u_char build_te_subtlvs(u_char *, struct isis_circuit *); +void isis_link_params_update(struct isis_circuit *, struct interface *); +void isis_mpls_te_update(struct interface *); +void isis_mpls_te_config_write_router (struct vty *); + +#endif /* _ZEBRA_ISIS_MPLS_TE_H */ |