/*
* This is an implementation of RFC4970 Router Information
* with support of RFC5088 PCE Capabilites announcement
+ * and support of draft-ietf-ospf-segment-routing-extensions-18
+ * for Segment Routing Capabilities announcement
+ *
*
* Module name: Router Information
- * Version: 0.99.22
- * Created: 2012-02-01 by Olivier Dugeon
- * Copyright (C) 2012 Orange Labs http://www.orange.com/
+ * Author: Olivier Dugeon <olivier.dugeon@orange.com>
+ * Copyright (C) 2012 - 2017 Orange Labs http://www.orange.com/
*
* This file is part of GNU Zebra.
*
* 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.
+ * 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 _ZEBRA_OSPF_ROUTER_INFO_H
*
* 24 16 8 0
* +--------+--------+--------+--------+
- * | 1 | MBZ |........|........|
+ * | 4 | MBZ |........|........|
* +--------+--------+--------+--------+
* |<-Type->|<Resv'd>|<-- Instance --->|
*
* +--------+--------+--------+--------+ |
* | LS checksum | Length | V
* +--------+--------+--------+--------+ ---
- * | Type | Length | A
- * +--------+--------+--------+--------+ | TLV part for Router Information; Values might be
+ * | Type | Length | A TLV part for Router Information;
+ * +--------+--------+--------+--------+ | Values might be
* | Values ... | V structured as a set of sub-TLVs.
* +--------+--------+--------+--------+ ---
*/
-/*
- * Following section defines TLV (tag, length, value) structures,
- * used for Router Information.
- */
-struct ri_tlv_header
-{
- u_int16_t type; /* RI_TLV_XXX (see below) */
- u_int16_t length; /* Value portion only, in byte */
-};
-
-#define RI_TLV_HDR_SIZE (sizeof (struct ri_tlv_header))
-#define RI_TLV_BODY_SIZE(tlvh) (ROUNDUP (ntohs ((tlvh)->length), sizeof (u_int32_t)))
-#define RI_TLV_SIZE(tlvh) (RI_TLV_HDR_SIZE + RI_TLV_BODY_SIZE(tlvh))
-#define RI_TLV_HDR_TOP(lsah) (struct ri_tlv_header *)((char *)(lsah) + OSPF_LSA_HEADER_SIZE)
-#define RI_TLV_HDR_NEXT(tlvh) (struct ri_tlv_header *)((char *)(tlvh) + RI_TLV_SIZE(tlvh))
-
/*
* Following section defines TLV body parts.
*/
-/* Up to now, 8 code point have been assigned to Router Information */
+/* Up to now, 11 code points have been assigned to Router Information */
/* Only type 1 Router Capabilities and 6 PCE are supported with this code */
-#define RI_IANA_MAX_TYPE 8
+#define RI_IANA_MAX_TYPE 11
/* RFC4970: Router Information Capabilities TLV */ /* Mandatory */
#define RI_TLV_CAPABILITIES 1
-struct ri_tlv_router_cap
-{
- struct ri_tlv_header header; /* Value length is 4 bytes. */
- u_int32_t value;
+struct ri_tlv_router_cap {
+ struct tlv_header header; /* Value length is 4 bytes. */
+ uint32_t value;
};
-#define RI_GRACE_RESTART 0x01
-#define RI_GRACE_HELPER 0x02
-#define RI_STUB_SUPPORT 0x04
-#define RI_TE_SUPPORT 0x08
-#define RI_P2P_OVER_LAN 0x10
-#define RI_TE_EXPERIMENTAL 0x20
+/* Capabilities bits are left align */
+#define RI_GRACE_RESTART 0x80000000
+#define RI_GRACE_HELPER 0x40000000
+#define RI_STUB_SUPPORT 0x20000000
+#define RI_TE_SUPPORT 0x10000000
+#define RI_P2P_OVER_LAN 0x08000000
+#define RI_TE_EXPERIMENTAL 0x04000000
#define RI_TLV_LENGTH 4
/* RI PCE TLV */
#define RI_TLV_PCE 6
-struct ri_tlv_pce
-{
- struct ri_tlv_header header;
-/* A set of PCE-sub-TLVs will follow. */
+struct ri_tlv_pce {
+ struct tlv_header header;
+ /* A set of PCE-sub-TLVs will follow. */
};
/* PCE Address Sub-TLV */ /* Mandatory */
#define RI_PCE_SUBTLV_ADDRESS 1
-struct ri_pce_subtlv_address
-{
- struct ri_tlv_header header; /* Type = 1; Length is 8 (IPv4) or 20 (IPv6) bytes. */
+struct ri_pce_subtlv_address {
+ /* Type = 1; Length is 8 (IPv4) or 20 (IPv6) bytes. */
+ struct tlv_header header;
#define PCE_ADDRESS_LENGTH_IPV4 8
#define PCE_ADDRESS_LENGTH_IPV6 20
- struct
- {
- u_int16_t type; /* Address type: 1 = IPv4, 2 = IPv6 */
+ struct {
+ uint16_t type; /* Address type: 1 = IPv4, 2 = IPv6 */
#define PCE_ADDRESS_TYPE_IPV4 1
#define PCE_ADDRESS_TYPE_IPV6 2
- u_int16_t reserved;
- struct in_addr value; /* PCE address */
- } address;
+ uint16_t reserved;
+ struct in_addr value; /* PCE address */
+ } address;
};
/* PCE Path-Scope Sub-TLV */ /* Mandatory */
#define RI_PCE_SUBTLV_PATH_SCOPE 2
-struct ri_pce_subtlv_path_scope
-{
- struct ri_tlv_header header; /* Type = 2; Length = 4 bytes. */
- u_int32_t value; /* L, R, Rd, S, Sd, Y, PrefL, PrefR, PrefS and PrefY bits see RFC5088 page 9 */
+struct ri_pce_subtlv_path_scope {
+ struct tlv_header header; /* Type = 2; Length = 4 bytes. */
+ /*
+ * L, R, Rd, S, Sd, Y, PrefL, PrefR, PrefS and PrefY bits:
+ * see RFC5088 page 9
+ */
+ uint32_t value;
};
/* PCE Domain Sub-TLV */ /* Optional */
#define PCE_DOMAIN_TYPE_AREA 1
#define PCE_DOMAIN_TYPE_AS 2
-struct ri_pce_subtlv_domain
-{
- struct ri_tlv_header header; /* Type = 3; Length = 8 bytes. */
- u_int16_t type; /* Domain type: 1 = OSPF Area ID, 2 = AS Number */
- u_int16_t reserved;
- u_int32_t value;
+struct ri_pce_subtlv_domain {
+ struct tlv_header header; /* Type = 3; Length = 8 bytes. */
+ uint16_t type; /* Domain type: 1 = OSPF Area ID, 2 = AS Number */
+ uint16_t reserved;
+ uint32_t value;
};
/* PCE Neighbor Sub-TLV */ /* Mandatory if R or S bit is set */
#define RI_PCE_SUBTLV_NEIGHBOR 4
-struct ri_pce_subtlv_neighbor
-{
- struct ri_tlv_header header; /* Type = 4; Length = 8 bytes. */
- u_int16_t type; /* Domain type: 1 = OSPF Area ID, 2 = AS Number */
- u_int16_t reserved;
- u_int32_t value;
+struct ri_pce_subtlv_neighbor {
+ struct tlv_header header; /* Type = 4; Length = 8 bytes. */
+ uint16_t type; /* Domain type: 1 = OSPF Area ID, 2 = AS Number */
+ uint16_t reserved;
+ uint32_t value;
};
/* PCE Capabilities Flags Sub-TLV */ /* Optional */
#define RI_PCE_SUBTLV_CAP_FLAG 5
#define PCE_CAP_GMPLS_LINK 0x0001
-#define PCE_CAP_BIDIRECTIONAL 0x0002
-#define PCE_CAP_DIVERSE_PATH 0x0004
-#define PCE_CAP_LOAD_BALANCE 0x0008
-#define PCE_CAP_SYNCHRONIZED 0x0010
+#define PCE_CAP_BIDIRECTIONAL 0x0002
+#define PCE_CAP_DIVERSE_PATH 0x0004
+#define PCE_CAP_LOAD_BALANCE 0x0008
+#define PCE_CAP_SYNCHRONIZED 0x0010
#define PCE_CAP_OBJECTIVES 0x0020
#define PCE_CAP_ADDITIVE 0x0040
-#define PCE_CAP_PRIORIZATION 0x0080
-#define PCE_CAP_MULTIPLE_REQ 0x0100
+#define PCE_CAP_PRIORIZATION 0x0080
+#define PCE_CAP_MULTIPLE_REQ 0x0100
-struct ri_pce_subtlv_cap_flag
-{
- struct ri_tlv_header header; /* Type = 5; Length = n x 4 bytes. */
- u_int32_t value;
+struct ri_pce_subtlv_cap_flag {
+ struct tlv_header header; /* Type = 5; Length = n x 4 bytes. */
+ uint32_t value;
};
-/* Prototypes. */
-extern int ospf_router_info_init (void);
-extern void ospf_router_info_term (void);
+/* Structure to share flooding scope info for Segment Routing */
+struct scope_info {
+ uint8_t scope;
+ struct list *areas;
+};
+
+/* Flags to manage the Router Information LSA. */
+#define RIFLG_LSA_INACTIVE 0x0
+#define RIFLG_LSA_ENGAGED 0x1
+#define RIFLG_LSA_FORCED_REFRESH 0x2
+
+/* Store Router Information PCE TLV and SubTLV in network byte order. */
+struct ospf_pce_info {
+ bool enabled;
+ struct ri_tlv_pce pce_header;
+ struct ri_pce_subtlv_address pce_address;
+ struct ri_pce_subtlv_path_scope pce_scope;
+ struct list *pce_domain;
+ struct list *pce_neighbor;
+ struct ri_pce_subtlv_cap_flag pce_cap_flag;
+};
+
+/*
+ * Store Router Information Segment Routing TLV and SubTLV
+ * in network byte order
+ */
+struct ospf_ri_sr_info {
+ bool enabled;
+ /* Algorithms supported by the node */
+ struct ri_sr_tlv_sr_algorithm algo;
+ /*
+ * Segment Routing Global Block i.e. label range
+ * Only one range supported in this code
+ */
+ struct ri_sr_tlv_sid_label_range range;
+ /* Maximum SID Depth supported by the node */
+ struct ri_sr_tlv_node_msd msd;
+};
+
+/* Store area information to flood LSA per area */
+struct ospf_ri_area_info {
+
+ uint32_t flags;
+
+ /* area pointer if flooding is Type 10 Null if flooding is AS scope */
+ struct ospf_area *area;
+};
+
+/* Following structure are internal use only. */
+struct ospf_router_info {
+ bool enabled;
+
+ uint8_t registered;
+ uint8_t scope;
+ /* LSA flags are only used when scope is AS flooding */
+ uint32_t as_flags;
+ /* List of area info to flood RI LSA */
+ struct list *area_info;
+
+ /* Store Router Information Capabilities LSA */
+ struct ri_tlv_router_cap router_cap;
+
+ /* Store PCE capability LSA */
+ struct ospf_pce_info pce_info;
+
+ /* Store SR capability LSA */
+ struct ospf_ri_sr_info sr_info;
+};
+
+/* Prototypes. */
+extern int ospf_router_info_init(void);
+extern void ospf_router_info_term(void);
+extern void ospf_router_info_finish(void);
+extern int ospf_router_info_enable(void);
+extern void ospf_router_info_update_sr(bool enable, struct sr_srgb srgb,
+ uint8_t msd);
+extern struct scope_info ospf_router_info_get_flooding_scope(void);
#endif /* _ZEBRA_OSPF_ROUTER_INFO_H */
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