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authorNeale Ranns <nranns@cisco.com>2017-10-21 10:53:20 -0700
committerDamjan Marion <dmarion.lists@gmail.com>2017-11-09 15:16:52 +0000
commitd792d9c01e60656cbfe1b0f1fd6a9b125f5dab0c (patch)
treedb88d99dd8102389fb92e8ed44bc7d6a55dc3080 /src/vnet/bier/bier_imp.h
parenta2ff7b8cfc829ffbb6d5de7534efb51f7cba9cf3 (diff)
BIER
- see draft-ietf-bier-mpls-encapsulation-10 - midpoint, head and tail functions - supported payload protocols; IPv4 and IPv6 only. Change-Id: I59d7363bb6fdfdce8e4016a68a9c8f5a5e5791cb Signed-off-by: Neale Ranns <nranns@cisco.com>
Diffstat (limited to 'src/vnet/bier/bier_imp.h')
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1 files changed, 87 insertions, 0 deletions
diff --git a/src/vnet/bier/bier_imp.h b/src/vnet/bier/bier_imp.h
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+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/**
+ * bier_imposition : The BIER imposition object
+ *
+ * A BIER imposition object is present in the IP mcast output list
+ * and represents the imposition of a BIER bitmask. After BIER header
+ * imposition the packet is forward within the appropriate/specifid
+ * BIER table
+ */
+
+#ifndef __BIER_IMPOSITION_H__
+#define __BIER_IMPOSITION_H__
+
+#include <vnet/bier/bier_types.h>
+#include <vnet/fib/fib_types.h>
+#include <vnet/dpo/dpo.h>
+
+/**
+ * The BIER imposition object
+ */
+typedef struct bier_imp_t_ {
+ /**
+ * The BIER table into which to forward the post imposed packet
+ */
+ bier_table_id_t bi_tbl;
+
+ /**
+ * number of locks
+ */
+ u32 bi_locks;
+
+ /**
+ * The DPO contirubted from the resolving BIER table.
+ * One per-IP protocol. This allows us to share a BIER imposition
+ * object for a IPv4 and IPv6 mfib path.
+ */
+ dpo_id_t bi_dpo[FIB_PROTOCOL_IP_MAX];
+
+ /**
+ * The Header to impose.
+ */
+ bier_hdr_t bi_hdr;
+
+ /**
+ * The bit string.
+ * This is a memory v. speed tradeoff. We inline here the
+ * largest header type so as the bitstring is on the same
+ * cacheline as the header.
+ */
+ bier_bit_mask_4096_t bi_bits;
+} bier_imp_t;
+
+extern index_t bier_imp_add_or_lock(const bier_table_id_t *bt,
+ bier_bp_t sender,
+ const bier_bit_string_t *bs);
+
+extern void bier_imp_unlock(index_t bii);
+extern void bier_imp_lock(index_t bii);
+
+extern u8* format_bier_imp(u8* s, va_list *ap);
+
+extern void bier_imp_contribute_forwarding(index_t bii,
+ dpo_proto_t proto,
+ dpo_id_t *dpo);
+
+extern bier_imp_t *bier_imp_pool;
+
+always_inline bier_imp_t*
+bier_imp_get (index_t bii)
+{
+ return (pool_elt_at_index(bier_imp_pool, bii));
+}
+
+#endif