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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.
+ */
+/**
+ * @file
+ * @brief LISP sub-interfaces.
+ *
+ */
+
+#ifndef __LISP_GPE_SUB_INTERFACE_H__
+#define __LISP_GPE_SUB_INTERFACE_H__
+
+#include <vnet/lisp-gpe/lisp_gpe.h>
+
+/**
+ * A Key for lookup in the L£ sub-interface DB
+ */
+typedef struct lisp_gpe_sub_interface_key_t_
+{
+ /**
+ * The local-RLOC. This is the interface's 'source' address.
+ */
+ ip_address_t local_rloc;
+
+ /**
+ * The VNI. In network byte order!
+ */
+ u32 vni;
+} lisp_gpe_sub_interface_key_t;
+
+/**
+ * @brief A LISP L3 sub-interface
+ *
+ * A LISP sub-interface is a multi-access interface, whose local address is a
+ * single local-RLOC. Adjacencies that form on this sub-interface, represent
+ * remote RLOCs.
+ * This is analogous to an ethernet interface.
+ * As with all interface types it can only be present in one VRF, hence a
+ * LISP sub-interface is per-local-rloc and per-VNI.
+ */
+typedef struct lisp_gpe_sub_interface_t_
+{
+ /**
+ * The interface's key inthe DB; rloc & vni;
+ * The key is allocated from the heap so it can be used in the hash-table.
+ * if it's part of the object, then it is subjet to realloc, which no-worky.
+ */
+ lisp_gpe_sub_interface_key_t *key;
+
+ /**
+ * The Table-ID in the overlay that this interface is bound to.
+ */
+ u32 eid_table_id;
+
+ /**
+ * A reference counting lock on the number of users of this interface.
+ * When this count drops to 0 the interface is deleted.
+ */
+ u32 locks;
+
+ /**
+ * The SW if index assigned to this sub-interface
+ */
+ u32 sw_if_index;
+
+ /**
+ * The SW IF index assigned to the main interface of which this is a sub.
+ */
+ u32 main_sw_if_index;
+} lisp_gpe_sub_interface_t;
+
+extern index_t lisp_gpe_sub_interface_find_or_create_and_lock (const
+ ip_address_t *
+ lrloc,
+ u32
+ eid_table_id,
+ u32 vni);
+
+extern u8 *format_lisp_gpe_sub_interface (u8 * s, va_list ap);
+
+extern void lisp_gpe_sub_interface_unlock (index_t itf);
+
+extern const lisp_gpe_sub_interface_t *lisp_gpe_sub_interface_get (index_t
+ itf);
+
+/**
+ * A DB of all L3 sub-interfaces. The key is:{VNI,l-RLOC}
+ */
+extern uword *lisp_gpe_sub_interfaces_sw_if_index;
+
+/**
+ * @brief
+ * Get a VNET L3 interface matching the local-RLOC and VNI
+ * Called from the data-plane
+ */
+always_inline u32
+lisp_gpe_sub_interface_find_ip6 (const ip6_address_t * addr, u32 vni)
+{
+ lisp_gpe_sub_interface_key_t key;
+ const uword *p;
+
+ key.local_rloc.ip.v6.as_u64[0] = addr->as_u64[0];
+ key.local_rloc.ip.v6.as_u64[1] = addr->as_u64[1];
+ key.local_rloc.version = IP6;
+ key.vni = vni;
+
+ p = hash_get_mem (&lisp_gpe_sub_interfaces_sw_if_index, &key);
+
+ if (NULL != p)
+ return p[0];
+
+ return (INDEX_INVALID);
+}
+
+/**
+ * @brief
+ * Get a VNET L3 interface matching the local-RLOC and VNI
+ * Called from the data-plane
+ */
+always_inline index_t
+lisp_gpe_sub_interface_find_ip4 (const ip4_address_t * addr, u32 vni)
+{
+ lisp_gpe_sub_interface_key_t key;
+ const uword *p;
+
+ key.local_rloc.ip.v4.as_u32 = addr->as_u32;
+ key.local_rloc.version = IP4;
+ key.vni = vni;
+
+ p = hash_get_mem (&lisp_gpe_sub_interfaces_sw_if_index, &key);
+
+ if (NULL != p)
+ return p[0];
+
+ return (INDEX_INVALID);
+}
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
+
+#endif