+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* This is an implementation of Segment Routing for IS-IS as per RFC 8667
*
*
* Author: Olivier Dugeon <olivier.dugeon@orange.com>
* Contributor: Renato Westphal <renato@opensourcerouting.org> for NetDEF
- *
- * This program 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 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; see the file COPYING; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef _FRR_ISIS_SR_H
#define SRLB_UPPER_BOUND 15999
/* Segment Routing Data Base (SRDB) RB-Tree structure */
-PREDECL_RBTREE_UNIQ(srdb_node)
-PREDECL_RBTREE_UNIQ(srdb_node_prefix)
-PREDECL_RBTREE_UNIQ(srdb_area_prefix)
-PREDECL_RBTREE_UNIQ(srdb_prefix_cfg)
+PREDECL_RBTREE_UNIQ(srdb_prefix_cfg);
+
+/*
+ * Segment Routing Prefix-SID information.
+ *
+ * This structure is intended to be embedded inside other structures that
+ * might or might not contain Prefix-SID information.
+ */
+struct isis_sr_psid_info {
+ /* Prefix-SID Sub-TLV information. */
+ struct isis_prefix_sid sid;
+
+ /* Resolved input/output label. */
+ mpls_label_t label;
+
+ /* Indicates whether the Prefix-SID is present or not. */
+ bool present;
+};
/* Segment Routing Local Block allocation */
struct sr_local_block {
/* Adjacency type. */
enum sr_adj_type type;
+ /* Adjacency-SID input label. */
+ mpls_label_t input_label;
+
/* Adjacency-SID nexthop information. */
struct {
int family;
union g_addr address;
- mpls_label_t label;
} nexthop;
+ /* Adjacency-SID TI-LFA backup nexthops. */
+ struct list *backup_nexthops;
+
/* (LAN-)Adjacency-SID Sub-TLV. */
union {
struct isis_adj_sid *adj_sid;
struct isis_adjacency *adj;
};
-/* Segment Routing Prefix-SID type. */
-enum sr_prefix_type {
- ISIS_SR_PREFIX_LOCAL = 0,
- ISIS_SR_PREFIX_REMOTE,
-};
-
-/* Segment Routing Nexthop Information. */
-struct sr_nexthop_info {
- mpls_label_t label;
- time_t uptime;
-};
-
-/* State of Object (SR-Node and SR-Prefix) stored in SRDB */
-enum srdb_state {
- SRDB_STATE_VALIDATED = 0,
- SRDB_STATE_NEW,
- SRDB_STATE_MODIFIED,
- SRDB_STATE_UNCHANGED
-};
-
-/* Segment Routing Prefix-SID. */
-struct sr_prefix {
- /* SRDB RB-tree entries. */
- struct srdb_node_prefix_item node_entry;
- struct srdb_area_prefix_item area_entry;
-
- /* IP prefix. */
- struct prefix prefix;
-
- /* SID value, algorithm and flags subTLVs. */
- struct isis_prefix_sid sid;
-
- /* Input label value. */
- mpls_label_t input_label;
-
- /* Prefix-SID type. */
- enum sr_prefix_type type;
- union {
- struct {
- /* Information about this local Prefix-SID. */
- struct sr_nexthop_info info;
- } local;
- struct {
- /* Route associated to this remote Prefix-SID. */
- struct isis_route_info *rinfo;
- } remote;
- } u;
-
- /* Backpointer to Segment Routing node. */
- struct sr_node *srn;
-
- /* SR-Prefix State used while the LSPDB is being parsed. */
- enum srdb_state state;
-};
-
-/* Segment Routing node. */
-struct sr_node {
- /* SRDB RB-tree entry. */
- struct srdb_node_item entry;
-
- /* IS-IS level: ISIS_LEVEL1 or ISIS_LEVEL2. */
- int level;
-
- /* IS-IS node identifier. */
- uint8_t sysid[ISIS_SYS_ID_LEN];
-
- /* Segment Routing node capabilities (SRGB, SR Algorithms) subTLVs. */
- struct isis_router_cap cap;
-
- /* List of Prefix-SIDs advertised by this node. */
- struct srdb_node_prefix_head prefix_sids;
-
- /* Backpointer to IS-IS area. */
- struct isis_area *area;
-
- /* SR-Node State used while the LSPDB is being parsed. */
- enum srdb_state state;
-};
-
/* SID type. NOTE: these values must be in sync with the YANG module. */
enum sr_sid_value_type {
SR_SID_VALUE_TYPE_INDEX = 0,
/* SID last hop behavior. */
enum sr_last_hop_behavior last_hop_behavior;
+ /* Indicates whether the node flag must be explicitly unset. */
+ bool n_flag_clear;
+
/* Does this Prefix-SID refer to a loopback address (Node-SID)? */
bool node_sid;
/* List of local Adjacency-SIDs. */
struct list *adj_sids;
- /* Segment Routing Node information per IS-IS level. */
- struct srdb_node_head sr_nodes[ISIS_LEVELS];
-
- /* Segment Routing Prefix-SIDs per IS-IS level. */
- struct srdb_area_prefix_head prefix_sids[ISIS_LEVELS];
-
/* Management of SRLB & SRGB allocation */
struct sr_local_block srlb;
bool srgb_active;
};
/* Prototypes. */
+extern struct isis_sr_block *isis_sr_find_srgb(struct lspdb_head *lspdb,
+ const uint8_t *sysid);
+extern mpls_label_t sr_prefix_in_label(struct isis_area *area,
+ struct isis_prefix_sid *psid,
+ bool local);
+extern mpls_label_t sr_prefix_out_label(struct lspdb_head *lspdb, int family,
+ struct isis_prefix_sid *psid,
+ const uint8_t *nh_sysid, bool last_hop);
extern int isis_sr_cfg_srgb_update(struct isis_area *area, uint32_t lower_bound,
uint32_t upper_bound);
extern int isis_sr_cfg_srlb_update(struct isis_area *area, uint32_t lower_bound,
extern void isis_sr_prefix_cfg2subtlv(const struct sr_prefix_cfg *pcfg,
bool external,
struct isis_prefix_sid *psid);
-extern void isis_sr_nexthop_update(struct sr_nexthop_info *srnh,
- mpls_label_t label);
-extern void isis_sr_nexthop_reset(struct sr_nexthop_info *srnh);
-extern void isis_area_verify_sr(struct isis_area *area);
+extern void sr_adj_sid_add_single(struct isis_adjacency *adj, int family,
+ bool backup, struct list *nexthops);
+extern struct sr_adjacency *isis_sr_adj_sid_find(struct isis_adjacency *adj,
+ int family,
+ enum sr_adj_type type);
+extern void isis_area_delete_backup_adj_sids(struct isis_area *area, int level);
+extern char *sr_op2str(char *buf, size_t size, mpls_label_t label_in,
+ mpls_label_t label_out);
extern int isis_sr_start(struct isis_area *area);
extern void isis_sr_stop(struct isis_area *area);
extern void isis_sr_area_init(struct isis_area *area);
projects / mirror_frr.git / blobdiff