summaryrefslogtreecommitdiffstats
path: root/src/vnet/session/transport.h
blob: 978e3f072b145e8f96ccbc51693b6cd9898c2777 (plain)
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
250
251
252
253
254
255
256
257
258
259
260
261
262
263
/*
 * Copyright (c) 2017-2019 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 SRC_VNET_SESSION_TRANSPORT_H_
#define SRC_VNET_SESSION_TRANSPORT_H_

#include <vnet/vnet.h>
#include <vnet/session/transport_types.h>

typedef struct _transport_options_t
{
  transport_tx_fn_type_t tx_type;
  transport_service_type_t service_type;
} transport_options_t;

/*
 * Transport protocol virtual function table
 */
/* *INDENT-OFF* */
typedef struct _transport_proto_vft
{
  /*
   * Setup
   */
  u32 (*start_listen) (u32 session_index, transport_endpoint_t * lcl);
  u32 (*stop_listen) (u32 conn_index);
  int (*connect) (transport_endpoint_cfg_t * rmt);
  void (*close) (u32 conn_index, u32 thread_index);
  void (*cleanup) (u32 conn_index, u32 thread_index);
  clib_error_t *(*enable) (vlib_main_t * vm, u8 is_en);

  /*
   * Transmission
   */

  u32 (*push_header) (transport_connection_t * tconn, vlib_buffer_t * b);
  u16 (*send_mss) (transport_connection_t * tc);
  u32 (*send_space) (transport_connection_t * tc);
  u32 (*tx_fifo_offset) (transport_connection_t * tc);
  void (*update_time) (f64 time_now, u8 thread_index);
  void (*flush_data) (transport_connection_t *tconn);
  int (*custom_tx) (void *session);
  int (*app_rx_evt) (transport_connection_t *tconn);

  /*
   * Connection retrieval
   */
  transport_connection_t *(*get_connection) (u32 conn_idx, u32 thread_idx);
  transport_connection_t *(*get_listener) (u32 conn_index);
  transport_connection_t *(*get_half_open) (u32 conn_index);

  /*
   * Format
   */
  u8 *(*format_connection) (u8 * s, va_list * args);
  u8 *(*format_listener) (u8 * s, va_list * args);
  u8 *(*format_half_open) (u8 * s, va_list * args);

  /*
   *  Properties retrieval
   */
  void (*get_transport_endpoint) (u32 conn_index, u32 thread_index,
				  transport_endpoint_t *tep, u8 is_lcl);
  void (*get_transport_listener_endpoint) (u32 conn_index,
					   transport_endpoint_t *tep,
					   u8 is_lcl);

  /*
   * Properties
   */
  transport_options_t transport_options;
} transport_proto_vft_t;
/* *INDENT-ON* */

extern transport_proto_vft_t *tp_vfts;

#define transport_proto_foreach(VAR, BODY)			\
do {								\
    for (VAR = 0; VAR < vec_len (tp_vfts); VAR++)		\
      if (tp_vfts[VAR].push_header != 0)			\
	do { BODY; } while (0);					\
} while (0)

int transport_connect (transport_proto_t tp, transport_endpoint_cfg_t * tep);
void transport_close (transport_proto_t tp, u32 conn_index, u8 thread_index);
u32 transport_start_listen (transport_proto_t tp, u32 session_index,
			    transport_endpoint_t * tep);
u32 transport_stop_listen (transport_proto_t tp, u32 conn_index);
void transport_cleanup (transport_proto_t tp, u32 conn_index,
			u8 thread_index);
void transport_get_endpoint (transport_proto_t tp, u32 conn_index,
			     u32 thread_index, transport_endpoint_t * tep,
			     u8 is_lcl);
void transport_get_listener_endpoint (transport_proto_t tp, u32 conn_index,
				      transport_endpoint_t * tep, u8 is_lcl);

static inline transport_connection_t *
transport_get_connection (transport_proto_t tp, u32 conn_index,
			  u8 thread_index)
{
  return tp_vfts[tp].get_connection (conn_index, thread_index);
}

static inline transport_connection_t *
transport_get_listener (transport_proto_t tp, u32 conn_index)
{
  return tp_vfts[tp].get_listener (conn_index);
}

static inline transport_connection_t *
transport_get_half_open (transport_proto_t tp, u32 conn_index)
{
  return tp_vfts[tp].get_half_open (conn_index);
}

static inline int
transport_custom_tx (transport_proto_t tp, void *s)
{
  return tp_vfts[tp].custom_tx (s);
}

static inline int
transport_app_rx_evt (transport_proto_t tp, u32 conn_index, u32 thread_index)
{
  transport_connection_t *tc;
  if (!tp_vfts[tp].app_rx_evt)
    return 0;
  tc = transport_get_connection (tp, conn_index, thread_index);
  return tp_vfts[tp].app_rx_evt (tc);
}

void transport_register_protocol (transport_proto_t transport_proto,
				  const transport_proto_vft_t * vft,
				  fib_protocol_t fib_proto, u32 output_node);
transport_proto_vft_t *transport_protocol_get_vft (transport_proto_t tp);
void transport_update_time (f64 time_now, u8 thread_index);

int transport_alloc_local_port (u8 proto, ip46_address_t * ip);
int transport_alloc_local_endpoint (u8 proto, transport_endpoint_cfg_t * rmt,
				    ip46_address_t * lcl_addr,
				    u16 * lcl_port);
void transport_endpoint_cleanup (u8 proto, ip46_address_t * lcl_ip, u16 port);
void transport_enable_disable (vlib_main_t * vm, u8 is_en);
void transport_init (void);

always_inline u32
transport_elog_track_index (transport_connection_t * tc)
{
#if TRANSPORT_DEBUG
  return tc->elog_track.track_index_plus_one - 1;
#else
  return ~0;
#endif
}

void transport_connection_tx_pacer_reset (transport_connection_t * tc,
					  u32 rate_bytes_per_sec,
					  u32 initial_bucket, u64 time_now);
/**
 * Initialize tx pacer for connection
 *
 * @param tc				transport connection
 * @param rate_bytes_per_second		initial byte rate
 * @param burst_bytes			initial burst size in bytes
 */
void transport_connection_tx_pacer_init (transport_connection_t * tc,
					 u32 rate_bytes_per_sec,
					 u32 initial_bucket);

/**
 * Update tx pacer pacing rate
 *
 * @param tc			transport connection
 * @param bytes_per_sec		new pacing rate
 */
void transport_connection_tx_pacer_update (transport_connection_t * tc,
					   u64 bytes_per_sec);

/**
 * Get maximum tx burst allowed for transport connection
 *
 * @param tc		transport connection
 * @param time_now	current cpu time as returned by @ref clib_cpu_time_now
 * @param mss		transport's mss
 */
u32 transport_connection_snd_space (transport_connection_t * tc,
				    u64 time_now, u16 mss);

/**
 * Get tx pacer max burst
 *
 * @param tc		transport connection
 * @param time_now	current cpu time
 * @return		max burst for connection
 */
u32 transport_connection_tx_pacer_burst (transport_connection_t * tc,
					 u64 time_now);

/**
 * Get tx pacer current rate
 *
 * @param tc		transport connection
 * @return		rate for connection in bytes/s
 */
u64 transport_connection_tx_pacer_rate (transport_connection_t * tc);

/**
 * Initialize period for tx pacers
 *
 * Defines a unit of time with respect to number of cpu cycles that is to
 * be used by all tx pacers.
 */
void transport_init_tx_pacers_period (void);

/**
 * Check if transport connection is paced
 */
always_inline u8
transport_connection_is_tx_paced (transport_connection_t * tc)
{
  return (tc->flags & TRANSPORT_CONNECTION_F_IS_TX_PACED);
}

u8 *format_transport_pacer (u8 * s, va_list * args);

/**
 * Update tx byte stats for transport connection
 *
 * If tx pacing is enabled, this also updates pacer bucket to account for the
 * amount of bytes that have been sent.
 *
 * @param tc		transport connection
 * @param pkts		packets recently sent
 * @param bytes		bytes recently sent
 */
void transport_connection_update_tx_stats (transport_connection_t * tc,
					   u32 bytes);

void
transport_connection_tx_pacer_update_bytes (transport_connection_t * tc,
					    u32 bytes);

#endif /* SRC_VNET_SESSION_TRANSPORT_H_ */

/*
 * fd.io coding-style-patch-verification: ON
 *
 * Local Variables:
 * eval: (c-set-style "gnu")
 * End:
 */