2 * Copyright (c) 2020 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
16 #ifndef included_ip_vtep_h
17 #define included_ip_vtep_h
19 #include <vppinfra/hash.h>
20 #include <vnet/ip/ip.h>
21 #include <vnet/ip/ip46_address.h>
24 * @brief Tunnel endpoint key (IPv4)
26 * Tunnel modules maintain a set of vtep4_key_t-s to track local IP
27 * addresses that have tunnels established. Bypass node consults the
28 * corresponding set to decide whether a packet should bypass normal
29 * processing and go directly to the tunnel protocol handler node.
46 * @brief Tunnel endpoint key (IPv6)
48 * Tunnel modules maintain a set of vtep6_key_t-s to track local IP
49 * addresses that have tunnels established. Bypass node consults the
50 * corresponding set to decide whether a packet should bypass normal
51 * processing and go directly to the tunnel protocol handler node.
64 uword *vtep4; /* local ip4 VTEPs keyed on their ip4 addr + fib_index */
65 uword *vtep6; /* local ip6 VTEPs keyed on their ip6 addr + fib_index */
68 always_inline vtep_table_t
72 t.vtep6 = hash_create_mem (0, sizeof (vtep6_key_t), sizeof (uword));
76 uword vtep_addr_ref (vtep_table_t * t, u32 fib_index, ip46_address_t * ip);
77 uword vtep_addr_unref (vtep_table_t * t, u32 fib_index, ip46_address_t * ip);
80 vtep4_key_init (vtep4_key_t * k4)
82 k4->as_u64 = ~((u64) 0);
86 vtep6_key_init (vtep6_key_t * k6)
88 ip6_address_set_zero (&k6->addr);
89 k6->fib_index = (u32) ~ 0;
96 VTEP_CHECK_PASS_UNCHANGED = 2
100 vtep4_check (vtep_table_t * t, vlib_buffer_t * b0, ip4_header_t * ip40,
101 vtep4_key_t * last_k4)
104 k4.addr.as_u32 = ip40->dst_address.as_u32;
105 k4.fib_index = vlib_buffer_get_ip4_fib_index (b0);
106 if (PREDICT_TRUE (k4.as_u64 == last_k4->as_u64))
107 return VTEP_CHECK_PASS_UNCHANGED;
108 if (PREDICT_FALSE (!hash_get (t->vtep4, k4.as_u64)))
109 return VTEP_CHECK_FAIL;
110 last_k4->as_u64 = k4.as_u64;
111 return VTEP_CHECK_PASS;
116 vtep4_key_t vtep4_cache[8];
120 #ifdef CLIB_HAVE_VEC512
122 vtep4_check_vector (vtep_table_t * t, vlib_buffer_t * b0, ip4_header_t * ip40,
123 vtep4_key_t * last_k4, vtep4_cache_t * vtep4_u512)
126 k4.addr.as_u32 = ip40->dst_address.as_u32;
127 k4.fib_index = vlib_buffer_get_ip4_fib_index (b0);
129 if (PREDICT_TRUE (k4.as_u64 == last_k4->as_u64))
130 return VTEP_CHECK_PASS_UNCHANGED;
132 u64x8 k4_u64x8 = u64x8_splat (k4.as_u64);
133 u64x8 cache = u64x8_load_unaligned (vtep4_u512->vtep4_cache);
134 u8 result = u64x8_is_equal_mask (cache, k4_u64x8);
135 if (PREDICT_TRUE (result != 0))
138 vtep4_u512->vtep4_cache[count_trailing_zeros (result)].as_u64;
139 return VTEP_CHECK_PASS_UNCHANGED;
142 if (PREDICT_FALSE (!hash_get (t->vtep4, k4.as_u64)))
143 return VTEP_CHECK_FAIL;
145 vtep4_u512->vtep4_cache[vtep4_u512->idx].as_u64 = k4.as_u64;
146 vtep4_u512->idx = (vtep4_u512->idx + 1) & 0x7;
148 last_k4->as_u64 = k4.as_u64;
150 return VTEP_CHECK_PASS;
155 vtep6_check (vtep_table_t * t, vlib_buffer_t * b0, ip6_header_t * ip60,
156 vtep6_key_t * last_k6)
159 k6.fib_index = vlib_buffer_get_ip6_fib_index (b0);
160 if (PREDICT_TRUE (k6.fib_index == last_k6->fib_index
161 && ip60->dst_address.as_u64[0] == last_k6->addr.as_u64[0]
162 && ip60->dst_address.as_u64[1] ==
163 last_k6->addr.as_u64[1]))
165 return VTEP_CHECK_PASS_UNCHANGED;
167 k6.addr = ip60->dst_address;
168 if (PREDICT_FALSE (!hash_get_mem (t->vtep6, &k6)))
169 return VTEP_CHECK_FAIL;
171 return VTEP_CHECK_PASS;
173 #endif /* included_ip_vtep_h */
176 * fd.io coding-style-patch-verification: ON
179 * eval: (c-set-style "gnu")