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+/*
+ *------------------------------------------------------------------
+ * Copyright (c) 2017 Intel 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.
+ *------------------------------------------------------------------
+ */
+
+#ifndef _PPPOE_H
+#define _PPPOE_H
+
+#include <vnet/plugin/plugin.h>
+#include <vppinfra/lock.h>
+#include <vppinfra/error.h>
+#include <vppinfra/hash.h>
+#include <vnet/vnet.h>
+#include <vnet/ip/ip.h>
+#include <vnet/ethernet/ethernet.h>
+#include <vnet/ip/ip4_packet.h>
+#include <vnet/ip/ip6_packet.h>
+#include <vnet/dpo/dpo.h>
+#include <vnet/adj/adj_types.h>
+#include <vnet/fib/fib_table.h>
+#include <vlib/vlib.h>
+#include <vppinfra/bihash_8_8.h>
+
+
+typedef struct
+{
+ u8 ver_type;
+ u8 code;
+ u16 session_id;
+ u16 length;
+ u16 ppp_proto;
+} pppoe_header_t;
+
+#define PPPOE_VER_TYPE 0x11
+#define PPPOE_PADS 0x65
+
+typedef struct
+{
+ /* Rewrite string */
+ u8 *rewrite;
+
+ /* pppoe session_id in HOST byte order */
+ u16 session_id;
+
+ /* session client addresses */
+ ip46_address_t client_ip;
+
+ /* the index of tx interface for pppoe encaped packet */
+ u32 encap_if_index;
+
+ /** FIB indices - inner IP packet lookup here */
+ u32 decap_fib_index;
+
+ u8 local_mac[6];
+ u8 client_mac[6];
+
+ /* vnet intfc index */
+ u32 sw_if_index;
+ u32 hw_if_index;
+
+} pppoe_session_t;
+
+#define foreach_pppoe_input_next \
+_(DROP, "error-drop") \
+_(IP4_INPUT, "ip4-input") \
+_(IP6_INPUT, "ip6-input" ) \
+_(CP_INPUT, "pppoe-tap-dispatch" ) \
+
+typedef enum
+{
+#define _(s,n) PPPOE_INPUT_NEXT_##s,
+ foreach_pppoe_input_next
+#undef _
+ PPPOE_INPUT_N_NEXT,
+} pppoe_input_next_t;
+
+typedef enum
+{
+#define pppoe_error(n,s) PPPOE_ERROR_##n,
+#include <pppoe/pppoe_error.def>
+#undef pppoe_error
+ PPPOE_N_ERROR,
+} pppoe_input_error_t;
+
+
+#define MTU 1500
+#define MTU_BUFFERS ((MTU + VLIB_BUFFER_DATA_SIZE - 1) / VLIB_BUFFER_DATA_SIZE)
+#define NUM_BUFFERS_TO_ALLOC 32
+
+/*
+ * The size of pppoe session table
+ */
+#define PPPOE_NUM_BUCKETS (128 * 1024)
+#define PPPOE_MEMORY_SIZE (16<<20)
+
+/* *INDENT-OFF* */
+/*
+ * The PPPoE key is the mac address and session ID
+ */
+typedef struct
+{
+ union
+ {
+ struct
+ {
+ u16 session_id;
+ u8 mac[6];
+ } fields;
+ struct
+ {
+ u32 w0;
+ u32 w1;
+ } words;
+ u64 raw;
+ };
+} pppoe_entry_key_t;
+/* *INDENT-ON* */
+
+/* *INDENT-OFF* */
+/*
+ * The PPPoE entry results
+ */
+typedef struct
+{
+ union
+ {
+ struct
+ {
+ u32 sw_if_index;
+
+ u32 session_index;
+
+ } fields;
+ u64 raw;
+ };
+} pppoe_entry_result_t;
+/* *INDENT-ON* */
+
+typedef struct
+{
+ /* For DP: vector of encap session instances, */
+ pppoe_session_t *sessions;
+
+ /* For CP: vector of CP path */
+ BVT (clib_bihash) session_table;
+
+ /* Free vlib hw_if_indices */
+ u32 *free_pppoe_session_hw_if_indices;
+
+ /* Mapping from sw_if_index to session index */
+ u32 *session_index_by_sw_if_index;
+
+ /* used for pppoe cp path */
+ u32 tap_if_index;
+
+ /* API message ID base */
+ u16 msg_id_base;
+
+ /* convenience */
+ vlib_main_t *vlib_main;
+ vnet_main_t *vnet_main;
+
+} pppoe_main_t;
+
+extern pppoe_main_t pppoe_main;
+
+extern vlib_node_registration_t pppoe_input_node;
+extern vlib_node_registration_t pppoe_encap_node;
+extern vlib_node_registration_t pppoe_tap_dispatch_node;
+
+u8 *format_pppoe_encap_trace (u8 * s, va_list * args);
+
+typedef struct
+{
+ u8 is_add;
+ u8 is_ip6;
+ u16 session_id;
+ ip46_address_t client_ip;
+ u32 encap_if_index;
+ u32 decap_fib_index;
+ u8 local_mac[6];
+ u8 client_mac[6];
+} vnet_pppoe_add_del_session_args_t;
+
+int vnet_pppoe_add_del_session
+ (vnet_pppoe_add_del_session_args_t * a, u32 * sw_if_indexp);
+
+typedef struct
+{
+ u8 is_add;
+ u32 client_if_index;
+ u32 tap_if_index;
+} vnet_pppoe_add_del_tap_args_t;
+
+always_inline u64
+pppoe_make_key (u8 * mac_address, u16 session_id)
+{
+ u64 temp;
+
+ /*
+ * The mac address in memory is A:B:C:D:E:F
+ * The session_id in register is H:L
+ */
+#if CLIB_ARCH_IS_LITTLE_ENDIAN
+ /*
+ * Create the in-register key as F:E:D:C:B:A:H:L
+ * In memory the key is L:H:A:B:C:D:E:F
+ */
+ temp = *((u64 *) (mac_address)) << 16;
+ temp = (temp & ~0xffff) | (u64) (session_id);
+#else
+ /*
+ * Create the in-register key as H:L:A:B:C:D:E:F
+ * In memory the key is H:L:A:B:C:D:E:F
+ */
+ temp = *((u64 *) (mac_address)) >> 16;
+ temp = temp | (((u64) session_id) << 48);
+#endif
+
+ return temp;
+}
+
+static_always_inline void
+pppoe_lookup_1 (BVT (clib_bihash) * session_table,
+ pppoe_entry_key_t * cached_key,
+ pppoe_entry_result_t * cached_result,
+ u8 * mac0,
+ u16 session_id0,
+ pppoe_entry_key_t * key0,
+ u32 * bucket0, pppoe_entry_result_t * result0)
+{
+ /* set up key */
+ key0->raw = pppoe_make_key (mac0, session_id0);
+ *bucket0 = ~0;
+
+ if (key0->raw == cached_key->raw)
+ {
+ /* Hit in the one-entry cache */
+ result0->raw = cached_result->raw;
+ }
+ else
+ {
+ /* Do a regular session table lookup */
+ BVT (clib_bihash_kv) kv;
+
+ kv.key = key0->raw;
+ kv.value = ~0ULL;
+ BV (clib_bihash_search_inline) (session_table, &kv);
+ result0->raw = kv.value;
+
+ /* Update one-entry cache */
+ cached_key->raw = key0->raw;
+ cached_result->raw = result0->raw;
+ }
+}
+
+static_always_inline void
+pppoe_update_1 (BVT (clib_bihash) * session_table,
+ u8 * mac0,
+ u16 session_id0,
+ pppoe_entry_key_t * key0,
+ u32 * bucket0, pppoe_entry_result_t * result0)
+{
+ /* set up key */
+ key0->raw = pppoe_make_key (mac0, session_id0);
+ *bucket0 = ~0;
+
+ /* Update the entry */
+ BVT (clib_bihash_kv) kv;
+ kv.key = key0->raw;
+ kv.value = result0->raw;
+ BV (clib_bihash_add_del) (session_table, &kv, 1 /* is_add */ );
+
+}
+#endif /* _PPPOE_H */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */