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.
44 * @brief Tunnel endpoint key (IPv6)
46 * Tunnel modules maintain a set of vtep6_key_t-s to track local IP
47 * addresses that have tunnels established. Bypass node consults the
48 * corresponding set to decide whether a packet should bypass normal
49 * processing and go directly to the tunnel protocol handler node.
60 uword *vtep4; /* local ip4 VTEPs keyed on their ip4 addr + fib_index */
61 uword *vtep6; /* local ip6 VTEPs keyed on their ip6 addr + fib_index */
64 always_inline vtep_table_t
68 t.vtep6 = hash_create_mem (0, sizeof (vtep6_key_t), sizeof (uword));
72 uword vtep_addr_ref (vtep_table_t * t, u32 fib_index, ip46_address_t * ip);
73 uword vtep_addr_unref (vtep_table_t * t, u32 fib_index, ip46_address_t * ip);
76 vtep4_key_init (vtep4_key_t * k4)
78 k4->as_u64 = ~((u64) 0);
82 vtep6_key_init (vtep6_key_t * k6)
84 ip6_address_set_zero (&k6->addr);
85 k6->fib_index = (u32) ~ 0;
92 VTEP_CHECK_PASS_UNCHANGED = 2
96 vtep4_check (vtep_table_t * t, vlib_buffer_t * b0, ip4_header_t * ip40,
97 vtep4_key_t * last_k4)
100 k4.addr.as_u32 = ip40->dst_address.as_u32;
101 k4.fib_index = vlib_buffer_get_ip4_fib_index (b0);
102 if (PREDICT_TRUE (k4.as_u64 == last_k4->as_u64))
103 return VTEP_CHECK_PASS_UNCHANGED;
104 if (PREDICT_FALSE (!hash_get (t->vtep4, k4.as_u64)))
105 return VTEP_CHECK_FAIL;
106 last_k4->as_u64 = k4.as_u64;
107 return VTEP_CHECK_PASS;
112 vtep4_key_t vtep4_cache[8];
116 #ifdef CLIB_HAVE_VEC512
118 vtep4_check_vector (vtep_table_t * t, vlib_buffer_t * b0, ip4_header_t * ip40,
119 vtep4_key_t * last_k4, vtep4_cache_t * vtep4_u512)
122 k4.addr.as_u32 = ip40->dst_address.as_u32;
123 k4.fib_index = vlib_buffer_get_ip4_fib_index (b0);
125 if (PREDICT_TRUE (k4.as_u64 == last_k4->as_u64))
126 return VTEP_CHECK_PASS_UNCHANGED;
128 u64x8 k4_u64x8 = u64x8_splat (k4.as_u64);
129 u64x8 cache = u64x8_load_unaligned (vtep4_u512->vtep4_cache);
130 u8 result = u64x8_is_equal_mask (cache, k4_u64x8);
131 if (PREDICT_TRUE (result != 0))
134 vtep4_u512->vtep4_cache[count_trailing_zeros (result)].as_u64;
135 return VTEP_CHECK_PASS_UNCHANGED;
138 if (PREDICT_FALSE (!hash_get (t->vtep4, k4.as_u64)))
139 return VTEP_CHECK_FAIL;
141 vtep4_u512->vtep4_cache[vtep4_u512->idx].as_u64 = k4.as_u64;
142 vtep4_u512->idx = (vtep4_u512->idx + 1) & 0x7;
144 last_k4->as_u64 = k4.as_u64;
146 return VTEP_CHECK_PASS;
151 vtep6_check (vtep_table_t * t, vlib_buffer_t * b0, ip6_header_t * ip60,
152 vtep6_key_t * last_k6)
155 k6.fib_index = vlib_buffer_get_ip6_fib_index (b0);
156 if (PREDICT_TRUE (k6.fib_index == last_k6->fib_index
157 && ip60->dst_address.as_u64[0] == last_k6->addr.as_u64[0]
158 && ip60->dst_address.as_u64[1] ==
159 last_k6->addr.as_u64[1]))
161 return VTEP_CHECK_PASS_UNCHANGED;
163 k6.addr = ip60->dst_address;
164 if (PREDICT_FALSE (!hash_get_mem (t->vtep6, &k6)))
165 return VTEP_CHECK_FAIL;
167 return VTEP_CHECK_PASS;
169 #endif /* included_ip_vtep_h */
172 * fd.io coding-style-patch-verification: ON
175 * eval: (c-set-style "gnu")