--- /dev/null
+/*
+ * 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.
+ */
+
+#include <vnet/mpls/mpls_types.h>
+#include <vnet/dpo/drop_dpo.h>
+
+#include <vnet/fib/fib_table.h>
+#include <vnet/fib/fib_entry.h>
+#include <vnet/fib/fib_entry_src.h>
+#include <vnet/fib/mpls_fib.h>
+
+/**
+ * Source initialisation Function
+ */
+static void
+fib_entry_src_mpls_init (fib_entry_src_t *src)
+{
+ mpls_eos_bit_t eos;
+
+ src->fes_flags = FIB_ENTRY_SRC_FLAG_NONE;
+ src->mpls.fesm_label = MPLS_LABEL_INVALID;
+
+ FOR_EACH_MPLS_EOS_BIT(eos)
+ {
+ src->mpls.fesm_lfes[eos] = FIB_NODE_INDEX_INVALID;
+ }
+}
+
+/**
+ * Source deinitialisation Function
+ */
+static void
+fib_entry_src_mpls_deinit (fib_entry_src_t *src)
+{
+}
+
+static void
+fib_entry_src_mpls_remove (fib_entry_src_t *src)
+{
+ src->fes_pl = FIB_NODE_INDEX_INVALID;
+ src->mpls.fesm_label = MPLS_LABEL_INVALID;
+}
+
+static void
+fib_entry_src_mpls_add (fib_entry_src_t *src,
+ const fib_entry_t *entry,
+ fib_entry_flag_t flags,
+ fib_protocol_t proto,
+ const dpo_id_t *dpo)
+{
+ src->fes_pl =
+ fib_path_list_create_special(proto,
+ FIB_PATH_LIST_FLAG_DROP,
+ drop_dpo_get(fib_proto_to_dpo(proto)));
+}
+
+static void
+fib_entry_src_mpls_set_data (fib_entry_src_t *src,
+ const fib_entry_t *entry,
+ const void *data)
+{
+ fib_protocol_t payload_proto;
+ fib_node_index_t fei;
+ mpls_label_t label;
+ mpls_eos_bit_t eos;
+
+ /*
+ * post MPLS table alloc and the possible rea-alloc of fib entrys
+ * the entry pointer will no longer be valid. so save its index
+ */
+ payload_proto = entry->fe_prefix.fp_proto;
+ fei = fib_entry_get_index(entry);
+ label = *(mpls_label_t*)data;
+
+ if (MPLS_LABEL_INVALID == label)
+ {
+ /*
+ * removing the local label
+ */
+ FOR_EACH_MPLS_EOS_BIT(eos)
+ {
+ fib_table_entry_delete_index(src->mpls.fesm_lfes[eos],
+ FIB_SOURCE_SPECIAL);
+ }
+ fib_table_unlock(MPLS_FIB_DEFAULT_TABLE_ID, FIB_PROTOCOL_MPLS);
+ src->mpls.fesm_label = label;
+ }
+ else
+ {
+ fib_prefix_t prefix = {
+ .fp_proto = FIB_PROTOCOL_MPLS,
+ .fp_label = label,
+ };
+ fib_node_index_t fib_index;
+ dpo_id_t dpo = DPO_INVALID;
+
+ /*
+ * adding a new local label. make sure the MPLS fib exists.
+ */
+ if (MPLS_LABEL_INVALID == src->mpls.fesm_label)
+ {
+ fib_index =
+ fib_table_find_or_create_and_lock(FIB_PROTOCOL_MPLS,
+ MPLS_FIB_DEFAULT_TABLE_ID);
+ }
+ else
+ {
+ fib_index = mpls_fib_index_from_table_id(MPLS_FIB_DEFAULT_TABLE_ID);
+
+ /*
+ * if this is a change in label, reomve the old one first
+ */
+ if (src->mpls.fesm_label != label)
+ {
+ FOR_EACH_MPLS_EOS_BIT(eos)
+ {
+ ASSERT(FIB_NODE_INDEX_INVALID != src->mpls.fesm_lfes[eos]);
+ fib_table_entry_delete_index(src->mpls.fesm_lfes[eos],
+ FIB_SOURCE_SPECIAL);
+ }
+ }
+ }
+
+ src->mpls.fesm_label = label;
+
+ FOR_EACH_MPLS_EOS_BIT(eos)
+ {
+ prefix.fp_eos = eos;
+ prefix.fp_payload_proto = fib_proto_to_dpo(payload_proto);
+
+ fib_entry_contribute_forwarding(fei,
+ (eos ?
+ FIB_FORW_CHAIN_TYPE_MPLS_EOS :
+ FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS),
+ &dpo);
+ src->mpls.fesm_lfes[eos] =
+ fib_table_entry_special_dpo_add(fib_index,
+ &prefix,
+ FIB_SOURCE_SPECIAL,
+ FIB_ENTRY_FLAG_EXCLUSIVE,
+ &dpo);
+ dpo_reset(&dpo);
+ }
+ }
+}
+
+static const void *
+fib_entry_src_mpls_get_data (fib_entry_src_t *src,
+ const fib_entry_t *entry)
+{
+ return (&(src->mpls.fesm_label));
+}
+
+static u8*
+fib_entry_src_mpls_format (fib_entry_src_t *src,
+ u8* s)
+{
+ return (format(s, "MPLS local-label:%d", src->mpls.fesm_label));
+}
+
+const static fib_entry_src_vft_t mpls_src_vft = {
+ .fesv_init = fib_entry_src_mpls_init,
+ .fesv_deinit = fib_entry_src_mpls_deinit,
+ .fesv_add = fib_entry_src_mpls_add,
+ .fesv_remove = fib_entry_src_mpls_remove,
+ .fesv_format = fib_entry_src_mpls_format,
+ .fesv_set_data = fib_entry_src_mpls_set_data,
+ .fesv_get_data = fib_entry_src_mpls_get_data,
+ /*
+ * .fesv_fwd_update = fib_entry_src_mpls_fwd_update,
+ * When the forwarding for the IP entry is updated, any MPLS chains
+ * it has created are also updated. Since the MPLS entry will have already
+ * installed that chain/load-balance there is no need to update the netry
+ * FIXME: later: propagate any walk to the children of the MPLS entry. for SR
+ */
+};
+
+void
+fib_entry_src_mpls_register (void)
+{
+ fib_entry_src_register(FIB_SOURCE_MPLS, &mpls_src_vft);
+}
+
+
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