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
|
/*
* Copyright (c) 2017 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_INTERFACE_H_
#define SRC_VNET_SESSION_TRANSPORT_INTERFACE_H_
#include <vnet/vnet.h>
#include <vnet/session/transport.h>
typedef enum transport_dequeue_type_
{
TRANSPORT_TX_PEEK, /**< reliable transport protos */
TRANSPORT_TX_DEQUEUE, /**< unreliable transport protos */
TRANSPORT_TX_INTERNAL, /**< apps acting as transports */
TRANSPORT_TX_DGRAM, /**< datagram mode */
TRANSPORT_TX_N_FNS
} transport_tx_fn_type_t;
typedef enum transport_service_type_
{
TRANSPORT_SERVICE_VC, /**< virtual circuit service */
TRANSPORT_SERVICE_CL, /**< connectionless service */
TRANSPORT_SERVICE_APP, /**< app transport service */
TRANSPORT_N_SERVICES
} transport_service_type_t;
/*
* Transport protocol virtual function table
*/
/* *INDENT-OFF* */
typedef struct _transport_proto_vft
{
/*
* Setup
*/
u32 (*bind) (u32 session_index, transport_endpoint_t * lcl);
u32 (*unbind) (u32);
int (*open) (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);
/*
* 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
*/
transport_tx_fn_type_t tx_type;
transport_service_type_t service_type;
} 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)
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);
transport_service_type_t transport_protocol_service_type (transport_proto_t);
transport_tx_fn_type_t transport_protocol_tx_fn_type (transport_proto_t tp);
void transport_update_time (f64 time_now, u8 thread_index);
void transport_enable_disable (vlib_main_t * vm, u8 is_en);
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);
u32 transport_connection_tx_pacer_burst (transport_connection_t * tc,
u64 time_now);
/**
* 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_INTERFACE_H_ */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
|
