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_nat44_ei_inlines_h__
17 #define __included_nat44_ei_inlines_h__
19 #include <vppinfra/clib.h>
21 #include <nat/nat44-ei/nat44_ei.h>
22 #include <nat/nat44-ei/nat44_ei_ha.h>
25 calc_nat_key (ip4_address_t addr, u16 port, u32 fib_index, u8 proto)
27 ASSERT (fib_index <= (1 << 14) - 1);
28 ASSERT (proto <= (1 << 3) - 1);
29 return (u64) addr.as_u32 << 32 | (u64) port << 16 | fib_index << 3 |
34 split_nat_key (u64 key, ip4_address_t *addr, u16 *port, u32 *fib_index,
35 nat_protocol_t *proto)
39 addr->as_u32 = key >> 32;
43 *port = (key >> 16) & (u16) ~0;
47 *fib_index = key >> 3 & ((1 << 13) - 1);
56 init_nat_k (clib_bihash_kv_8_8_t *kv, ip4_address_t addr, u16 port,
57 u32 fib_index, nat_protocol_t proto)
59 kv->key = calc_nat_key (addr, port, fib_index, proto);
64 init_nat_kv (clib_bihash_kv_8_8_t *kv, ip4_address_t addr, u16 port,
65 u32 fib_index, nat_protocol_t proto, u32 thread_index,
68 init_nat_k (kv, addr, port, fib_index, proto);
69 kv->value = (u64) thread_index << 32 | session_index;
73 init_nat_i2o_k (clib_bihash_kv_8_8_t *kv, nat44_ei_session_t *s)
75 return init_nat_k (kv, s->in2out.addr, s->in2out.port, s->in2out.fib_index,
80 init_nat_i2o_kv (clib_bihash_kv_8_8_t *kv, nat44_ei_session_t *s,
81 u32 thread_index, u32 session_index)
83 init_nat_k (kv, s->in2out.addr, s->in2out.port, s->in2out.fib_index,
85 kv->value = (u64) thread_index << 32 | session_index;
89 init_nat_o2i_k (clib_bihash_kv_8_8_t *kv, nat44_ei_session_t *s)
91 return init_nat_k (kv, s->out2in.addr, s->out2in.port, s->out2in.fib_index,
96 init_nat_o2i_kv (clib_bihash_kv_8_8_t *kv, nat44_ei_session_t *s,
97 u32 thread_index, u32 session_index)
99 init_nat_k (kv, s->out2in.addr, s->out2in.port, s->out2in.fib_index,
101 kv->value = (u64) thread_index << 32 | session_index;
105 nat_value_get_thread_index (clib_bihash_kv_8_8_t *value)
107 return value->value >> 32;
111 nat_value_get_session_index (clib_bihash_kv_8_8_t *value)
113 return value->value & ~(u32) 0;
117 nat44_ei_is_interface_addr (ip4_main_t *im, vlib_node_runtime_t *node,
118 u32 sw_if_index0, u32 ip4_addr)
120 nat44_ei_runtime_t *rt = (nat44_ei_runtime_t *) node->runtime_data;
123 if (PREDICT_FALSE (rt->cached_sw_if_index != sw_if_index0))
125 ip_lookup_main_t *lm = &im->lookup_main;
126 ip_interface_address_t *ia;
129 rt->cached_sw_if_index = ~0;
130 hash_free (rt->cached_presence_by_ip4_address);
132 foreach_ip_interface_address (
133 lm, ia, sw_if_index0, 1 /* honor unnumbered */, ({
134 a = ip_interface_address_get_address (lm, ia);
135 hash_set (rt->cached_presence_by_ip4_address, a->as_u32, 1);
136 rt->cached_sw_if_index = sw_if_index0;
139 if (rt->cached_sw_if_index == ~0)
143 ip4_addr_exists = !!hash_get (rt->cached_presence_by_ip4_address, ip4_addr);
144 if (PREDICT_FALSE (ip4_addr_exists))
150 /** \brief Per-user LRU list maintenance */
152 nat44_ei_session_update_lru (nat44_ei_main_t *nm, nat44_ei_session_t *s,
155 /* don't update too often - timeout is in magnitude of seconds anyway */
156 if (s->last_heard > s->last_lru_update + 1)
158 clib_dlist_remove (nm->per_thread_data[thread_index].list_pool,
160 clib_dlist_addtail (nm->per_thread_data[thread_index].list_pool,
161 s->per_user_list_head_index, s->per_user_index);
162 s->last_lru_update = s->last_heard;
167 nat44_ei_user_session_increment (nat44_ei_main_t *nm, nat44_ei_user_t *u,
170 if (u->nsessions + u->nstaticsessions < nm->max_translations_per_user)
173 u->nstaticsessions++;
180 nat44_ei_delete_user_with_no_session (nat44_ei_main_t *nm, nat44_ei_user_t *u,
183 clib_bihash_kv_8_8_t kv;
184 nat44_ei_user_key_t u_key;
185 nat44_ei_main_per_thread_data_t *tnm =
186 vec_elt_at_index (nm->per_thread_data, thread_index);
188 if (u->nstaticsessions == 0 && u->nsessions == 0)
190 u_key.addr.as_u32 = u->addr.as_u32;
191 u_key.fib_index = u->fib_index;
192 kv.key = u_key.as_u64;
193 pool_put_index (tnm->list_pool, u->sessions_per_user_list_head_index);
194 pool_put (tnm->users, u);
195 clib_bihash_add_del_8_8 (&tnm->user_hash, &kv, 0);
196 vlib_set_simple_counter (&nm->total_users, thread_index, 0,
197 pool_elts (tnm->users));
201 static_always_inline u8
202 nat44_ei_maximum_sessions_exceeded (nat44_ei_main_t *nm, u32 thread_index)
204 if (pool_elts (nm->per_thread_data[thread_index].sessions) >=
205 nm->max_translations_per_thread)
211 nat44_ei_session_update_counters (nat44_ei_session_t *s, f64 now, uword bytes,
216 s->total_bytes += bytes;
217 nat_ha_sref (&s->out2in.addr, s->out2in.port, &s->ext_host_addr,
218 s->ext_host_port, s->nat_proto, s->out2in.fib_index,
219 s->total_pkts, s->total_bytes, thread_index,
220 &s->ha_last_refreshed, now);
223 #endif /* __included_nat44_ei_inlines_h__ */
226 * fd.io coding-style-patch-verification: ON
229 * eval: (c-set-style "gnu")