ospfd: Add support Router Capabilities support to OSPF
This is an implementation of RFC4970 (Router Information) and
RFC5088 (PCE Capabilities announcement)
* ospfd/Makefile.am: Add new file ospf_ri.c and ospf_ri.h
* ospfd/ospf_opaque.c: Add new Router Capabilities code point
* ospfd/ospf_ri.[c,h]: Implementation of RFC4970 & RFC5088
Signed-off-by: Olivier Dugeon <olivier.dugeon@orange.com>
diff --git a/ospfd/ospf_ri.h b/ospfd/ospf_ri.h
new file mode 100644
index 0000000..c507434
--- /dev/null
+++ b/ospfd/ospf_ri.h
@@ -0,0 +1,191 @@
+/*
+ * This is an implementation of RFC4970 Router Information
+ * with support of RFC5088 PCE Capabilites 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/
+ *
+ * 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_OSPF_ROUTER_INFO_H
+#define _ZEBRA_OSPF_ROUTER_INFO_H
+
+/*
+ * Opaque LSA's link state ID for Router Information is
+ * structured as follows.
+ *
+ * 24 16 8 0
+ * +--------+--------+--------+--------+
+ * | 1 | MBZ |........|........|
+ * +--------+--------+--------+--------+
+ * |<-Type->|<Resv'd>|<-- Instance --->|
+ *
+ *
+ * Type: IANA has assigned '4' for Router Information.
+ * MBZ: Reserved, must be set to zero.
+ * Instance: User may select an arbitrary 16-bit value.
+ *
+ */
+
+/*
+ * 24 16 8 0
+ * +--------+--------+--------+--------+ ---
+ * | LS age |Options | 9,10,11| A
+ * +--------+--------+--------+--------+ |
+ * | 4 | 0 | Instance | |
+ * +--------+--------+--------+--------+ |
+ * | Advertising router | | Standard (Opaque) LSA header;
+ * +--------+--------+--------+--------+ | Type 9,10 or 11 are used.
+ * | LS sequence number | |
+ * +--------+--------+--------+--------+ |
+ * | LS checksum | Length | V
+ * +--------+--------+--------+--------+ ---
+ * | 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 */
+/* Only type 1 Router Capabilities and 6 PCE are supported with this code */
+#define RI_IANA_MAX_TYPE 8
+
+/* 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;
+};
+
+#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
+
+#define RI_TLV_LENGTH 4
+
+/* RFC5088: PCE Capabilities TLV */ /* Optional */
+/* 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. */
+};
+
+/* 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. */
+#define PCE_ADDRESS_LENGTH_IPV4 8
+#define PCE_ADDRESS_LENGTH_IPV6 20
+ struct
+ {
+ u_int16_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;
+};
+
+/* 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 */
+};
+
+/* PCE Domain Sub-TLV */ /* Optional */
+#define RI_PCE_SUBTLV_DOMAIN 3
+
+#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;
+};
+
+/* 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;
+};
+
+/* 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_OBJECTIVES 0x0020
+#define PCE_CAP_ADDITIVE 0x0040
+#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;
+};
+
+/* Prototypes. */
+extern int ospf_router_info_init (void);
+extern void ospf_router_info_term (void);
+
+#endif /* _ZEBRA_OSPF_ROUTER_INFO_H */