1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
|
/*
* Copyright (c) 2020 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.
*/
#ifndef __included_nat44_ei_inlines_h__
#define __included_nat44_ei_inlines_h__
#include <vppinfra/clib.h>
#include <nat/nat44-ei/nat44_ei.h>
#include <nat/nat44-ei/nat44_ei_ha.h>
always_inline u64
calc_nat_key (ip4_address_t addr, u16 port, u32 fib_index, u8 proto)
{
ASSERT (fib_index <= (1 << 14) - 1);
ASSERT (proto <= (1 << 3) - 1);
return (u64) addr.as_u32 << 32 | (u64) port << 16 | fib_index << 3 |
(proto & 0x7);
}
always_inline void
split_nat_key (u64 key, ip4_address_t *addr, u16 *port, u32 *fib_index,
nat_protocol_t *proto)
{
if (addr)
{
addr->as_u32 = key >> 32;
}
if (port)
{
*port = (key >> 16) & (u16) ~0;
}
if (fib_index)
{
*fib_index = key >> 3 & ((1 << 13) - 1);
}
if (proto)
{
*proto = key & 0x7;
}
}
always_inline void
init_nat_k (clib_bihash_kv_8_8_t *kv, ip4_address_t addr, u16 port,
u32 fib_index, nat_protocol_t proto)
{
kv->key = calc_nat_key (addr, port, fib_index, proto);
kv->value = ~0ULL;
}
always_inline void
init_nat_kv (clib_bihash_kv_8_8_t *kv, ip4_address_t addr, u16 port,
u32 fib_index, nat_protocol_t proto, u32 thread_index,
u32 session_index)
{
init_nat_k (kv, addr, port, fib_index, proto);
kv->value = (u64) thread_index << 32 | session_index;
}
always_inline void
init_nat_i2o_k (clib_bihash_kv_8_8_t *kv, nat44_ei_session_t *s)
{
return init_nat_k (kv, s->in2out.addr, s->in2out.port, s->in2out.fib_index,
s->nat_proto);
}
always_inline void
init_nat_i2o_kv (clib_bihash_kv_8_8_t *kv, nat44_ei_session_t *s,
u32 thread_index, u32 session_index)
{
init_nat_k (kv, s->in2out.addr, s->in2out.port, s->in2out.fib_index,
s->nat_proto);
kv->value = (u64) thread_index << 32 | session_index;
}
always_inline void
init_nat_o2i_k (clib_bihash_kv_8_8_t *kv, nat44_ei_session_t *s)
{
return init_nat_k (kv, s->out2in.addr, s->out2in.port, s->out2in.fib_index,
s->nat_proto);
}
always_inline void
init_nat_o2i_kv (clib_bihash_kv_8_8_t *kv, nat44_ei_session_t *s,
u32 thread_index, u32 session_index)
{
init_nat_k (kv, s->out2in.addr, s->out2in.port, s->out2in.fib_index,
s->nat_proto);
kv->value = (u64) thread_index << 32 | session_index;
}
always_inline u32
nat_value_get_thread_index (clib_bihash_kv_8_8_t *value)
{
return value->value >> 32;
}
always_inline u32
nat_value_get_session_index (clib_bihash_kv_8_8_t *value)
{
return value->value & ~(u32) 0;
}
always_inline u8
nat44_ei_is_interface_addr (ip4_main_t *im, vlib_node_runtime_t *node,
u32 sw_if_index0, u32 ip4_addr)
{
nat44_ei_runtime_t *rt = (nat44_ei_runtime_t *) node->runtime_data;
ip4_address_t *first_int_addr;
if (PREDICT_FALSE (rt->cached_sw_if_index != sw_if_index0))
{
first_int_addr = ip4_interface_first_address (
im, sw_if_index0, 0 /* just want the address */);
rt->cached_sw_if_index = sw_if_index0;
if (first_int_addr)
rt->cached_ip4_address = first_int_addr->as_u32;
else
rt->cached_ip4_address = 0;
}
if (PREDICT_FALSE (ip4_addr == rt->cached_ip4_address))
return 1;
else
return 0;
}
/** \brief Per-user LRU list maintenance */
always_inline void
nat44_ei_session_update_lru (nat44_ei_main_t *nm, nat44_ei_session_t *s,
u32 thread_index)
{
/* don't update too often - timeout is in magnitude of seconds anyway */
if (s->last_heard > s->last_lru_update + 1)
{
clib_dlist_remove (nm->per_thread_data[thread_index].list_pool,
s->per_user_index);
clib_dlist_addtail (nm->per_thread_data[thread_index].list_pool,
s->per_user_list_head_index, s->per_user_index);
s->last_lru_update = s->last_heard;
}
}
always_inline void
nat44_ei_user_session_increment (nat44_ei_main_t *nm, nat44_ei_user_t *u,
u8 is_static)
{
if (u->nsessions + u->nstaticsessions < nm->max_translations_per_user)
{
if (is_static)
u->nstaticsessions++;
else
u->nsessions++;
}
}
always_inline void
nat44_ei_delete_user_with_no_session (nat44_ei_main_t *nm, nat44_ei_user_t *u,
u32 thread_index)
{
clib_bihash_kv_8_8_t kv;
nat44_ei_user_key_t u_key;
nat44_ei_main_per_thread_data_t *tnm =
vec_elt_at_index (nm->per_thread_data, thread_index);
if (u->nstaticsessions == 0 && u->nsessions == 0)
{
u_key.addr.as_u32 = u->addr.as_u32;
u_key.fib_index = u->fib_index;
kv.key = u_key.as_u64;
pool_put_index (tnm->list_pool, u->sessions_per_user_list_head_index);
pool_put (tnm->users, u);
clib_bihash_add_del_8_8 (&tnm->user_hash, &kv, 0);
vlib_set_simple_counter (&nm->total_users, thread_index, 0,
pool_elts (tnm->users));
}
}
static_always_inline u8
nat44_ei_maximum_sessions_exceeded (nat44_ei_main_t *nm, u32 thread_index)
{
if (pool_elts (nm->per_thread_data[thread_index].sessions) >=
nm->max_translations_per_thread)
return 1;
return 0;
}
always_inline void
nat44_ei_session_update_counters (nat44_ei_session_t *s, f64 now, uword bytes,
u32 thread_index)
{
s->last_heard = now;
s->total_pkts++;
s->total_bytes += bytes;
nat_ha_sref (&s->out2in.addr, s->out2in.port, &s->ext_host_addr,
s->ext_host_port, s->nat_proto, s->out2in.fib_index,
s->total_pkts, s->total_bytes, thread_index,
&s->ha_last_refreshed, now);
}
#endif /* __included_nat44_ei_inlines_h__ */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
|
