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
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
|
/*
* Copyright (c) 2017-2020 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_udp_h__
#define __included_udp_h__
#include <vnet/vnet.h>
#include <vnet/udp/udp_inlines.h>
#include <vnet/udp/udp_local.h>
#include <vnet/udp/udp_packet.h>
#include <vnet/ip/ip4_packet.h>
#include <vnet/ip/format.h>
#include <vnet/ip/ip.h>
#include <vnet/session/transport.h>
typedef enum
{
#define udp_error(n,s) UDP_ERROR_##n,
#include <vnet/udp/udp_error.def>
#undef udp_error
UDP_N_ERROR,
} udp_error_t;
#define foreach_udp_connection_flag \
_(CONNECTED, "CONNECTED") /**< connected mode */ \
_(OWNS_PORT, "OWNS_PORT") /**< port belong to conn (UDPC) */ \
_(CLOSING, "CLOSING") /**< conn closed with data */ \
_(LISTEN, "LISTEN") /**< conn is listening */ \
_(MIGRATED, "MIGRATED") /**< cloned to another thread */ \
enum udp_conn_flags_bits
{
#define _(sym, str) UDP_CONN_F_BIT_##sym,
foreach_udp_connection_flag
#undef _
UDP_CONN_N_FLAGS
};
typedef enum udp_conn_flags_
{
#define _(sym, str) UDP_CONN_F_##sym = 1 << UDP_CONN_F_BIT_##sym,
foreach_udp_connection_flag
#undef _
} udp_conn_flags_t;
typedef struct
{
/** Required for pool_get_aligned */
CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
transport_connection_t connection; /**< must be first */
clib_spinlock_t rx_lock; /**< rx fifo lock */
u8 flags; /**< connection flags */
u16 mss; /**< connection mss */
} udp_connection_t;
typedef struct
{
/* Name (a c string). */
char *name;
/* Port number in host byte order. */
udp_dst_port_t dst_port;
/* Node which handles this type. */
u32 node_index;
/* Next index for this type. */
u32 next_index;
/* UDP sessions refcount (not tunnels) */
u32 n_connections;
/* Parser for packet generator edits for this protocol */
unformat_function_t *unformat_pg_edit;
} udp_dst_port_info_t;
typedef enum
{
UDP_IP6 = 0,
UDP_IP4, /* the code is full of is_ip4... */
N_UDP_AF,
} udp_af_t;
typedef struct
{
udp_dst_port_info_t *dst_port_infos[N_UDP_AF];
/* Hash tables mapping name/protocol to protocol info index. */
uword *dst_port_info_by_name[N_UDP_AF];
uword *dst_port_info_by_dst_port[N_UDP_AF];
/* Sparse vector mapping udp dst_port in network byte order
to next index. */
u16 *next_by_dst_port4;
u16 *next_by_dst_port6;
u8 punt_unknown4;
u8 punt_unknown6;
/* Udp local to input arc index */
u32 local_to_input_edge[N_UDP_AF];
/*
* Per-worker thread udp connection pools used with session layer
*/
udp_connection_t **connections;
u32 *connection_peekers;
clib_spinlock_t *peekers_readers_locks;
clib_spinlock_t *peekers_write_locks;
udp_connection_t *listener_pool;
u16 default_mtu;
} udp_main_t;
extern udp_main_t udp_main;
extern vlib_node_registration_t udp4_input_node;
extern vlib_node_registration_t udp6_input_node;
extern vlib_node_registration_t udp4_local_node;
extern vlib_node_registration_t udp6_local_node;
void udp_add_dst_port (udp_main_t * um, udp_dst_port_t dst_port,
char *dst_port_name, u8 is_ip4);
always_inline udp_connection_t *
udp_connection_get (u32 conn_index, u32 thread_index)
{
if (pool_is_free_index (udp_main.connections[thread_index], conn_index))
return 0;
return pool_elt_at_index (udp_main.connections[thread_index], conn_index);
}
always_inline udp_connection_t *
udp_listener_get (u32 conn_index)
{
return pool_elt_at_index (udp_main.listener_pool, conn_index);
}
always_inline udp_main_t *
vnet_get_udp_main ()
{
return &udp_main;
}
always_inline udp_connection_t *
udp_connection_from_transport (transport_connection_t * tc)
{
return ((udp_connection_t *) tc);
}
always_inline u32
udp_connection_index (udp_connection_t * uc)
{
return (uc - udp_main.connections[uc->c_thread_index]);
}
void udp_connection_free (udp_connection_t * uc);
udp_connection_t *udp_connection_alloc (u32 thread_index);
/**
* Acquires a lock that blocks a connection pool from expanding.
*/
always_inline void
udp_pool_add_peeker (u32 thread_index)
{
if (thread_index != vlib_get_thread_index ())
return;
clib_spinlock_lock_if_init (&udp_main.peekers_readers_locks[thread_index]);
udp_main.connection_peekers[thread_index] += 1;
if (udp_main.connection_peekers[thread_index] == 1)
clib_spinlock_lock_if_init (&udp_main.peekers_write_locks[thread_index]);
clib_spinlock_unlock_if_init (&udp_main.peekers_readers_locks
[thread_index]);
}
always_inline void
udp_pool_remove_peeker (u32 thread_index)
{
if (thread_index != vlib_get_thread_index ())
return;
ASSERT (udp_main.connection_peekers[thread_index] > 0);
clib_spinlock_lock_if_init (&udp_main.peekers_readers_locks[thread_index]);
udp_main.connection_peekers[thread_index] -= 1;
if (udp_main.connection_peekers[thread_index] == 0)
clib_spinlock_unlock_if_init (&udp_main.peekers_write_locks
[thread_index]);
clib_spinlock_unlock_if_init (&udp_main.peekers_readers_locks
[thread_index]);
}
always_inline udp_connection_t *
udp_connection_clone_safe (u32 connection_index, u32 thread_index)
{
udp_connection_t *old_c, *new_c;
u32 current_thread_index = vlib_get_thread_index ();
new_c = udp_connection_alloc (current_thread_index);
/* If during the memcpy pool is reallocated AND the memory allocator
* decides to give the old chunk of memory to somebody in a hurry to
* scribble something on it, we have a problem. So add this thread as
* a session pool peeker.
*/
udp_pool_add_peeker (thread_index);
old_c = udp_main.connections[thread_index] + connection_index;
clib_memcpy_fast (new_c, old_c, sizeof (*new_c));
old_c->flags |= UDP_CONN_F_MIGRATED;
udp_pool_remove_peeker (thread_index);
new_c->c_thread_index = current_thread_index;
new_c->c_c_index = udp_connection_index (new_c);
new_c->c_fib_index = old_c->c_fib_index;
return new_c;
}
always_inline udp_dst_port_info_t *
udp_get_dst_port_info (udp_main_t * um, udp_dst_port_t dst_port, u8 is_ip4)
{
uword *p = hash_get (um->dst_port_info_by_dst_port[is_ip4], dst_port);
return p ? vec_elt_at_index (um->dst_port_infos[is_ip4], p[0]) : 0;
}
format_function_t format_udp_header;
format_function_t format_udp_rx_trace;
format_function_t format_udp_connection;
unformat_function_t unformat_udp_header;
unformat_function_t unformat_udp_port;
void udp_connection_share_port (u16 lcl_port, u8 is_ip4);
void udp_punt_unknown (vlib_main_t * vm, u8 is_ip4, u8 is_add);
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
#endif /* __included_udp_h__ */
|
