FD.io VPP  v17.04-9-g99c0734
Vector Packet Processing
builtin_server.c
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1 /*
2  * Copyright (c) 2016 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:
6  *
7  * http://www.apache.org/licenses/LICENSE-2.0
8  *
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.
14  */
15 
16 /** @file
17  udp builtin server
18 */
19 
20 #include <vnet/udp/udp.h>
21 #include <vnet/session/session.h>
23 
24 /** per-worker built-in server copy buffers */
26 
27 static int
29 {
30  /* Simple version: declare session ready-to-go... */
31  s->session_state = SESSION_STATE_READY;
32  return 0;
33 }
34 
35 static void
37 {
39 }
40 
41 static int
42 builtin_server_rx_callback (stream_session_t * s, session_fifo_event_t * ep)
43 {
44  svm_fifo_t *rx_fifo, *tx_fifo;
45  u32 this_transfer;
46  int actual_transfer;
47  u8 *my_copy_buffer;
48  session_fifo_event_t evt;
50 
51  my_copy_buffer = copy_buffers[s->thread_index];
52  rx_fifo = s->server_rx_fifo;
53  tx_fifo = s->server_tx_fifo;
54 
55  this_transfer = svm_fifo_max_enqueue (tx_fifo)
56  < svm_fifo_max_dequeue (rx_fifo) ?
57  svm_fifo_max_enqueue (tx_fifo) : svm_fifo_max_dequeue (rx_fifo);
58 
59  vec_validate (my_copy_buffer, this_transfer - 1);
60  _vec_len (my_copy_buffer) = this_transfer;
61 
62  actual_transfer = svm_fifo_dequeue_nowait (rx_fifo, 0, this_transfer,
63  my_copy_buffer);
64  ASSERT (actual_transfer == this_transfer);
65  actual_transfer = svm_fifo_enqueue_nowait (tx_fifo, 0, this_transfer,
66  my_copy_buffer);
67 
68  copy_buffers[s->thread_index] = my_copy_buffer;
69 
70  /* Fabricate TX event, send to ourselves */
71  evt.fifo = tx_fifo;
72  evt.event_type = FIFO_EVENT_SERVER_TX;
73  /* $$$$ for event logging */
74  evt.enqueue_length = actual_transfer;
75  evt.event_id = 0;
76  q = session_manager_get_vpp_event_queue (s->thread_index);
77  unix_shared_memory_queue_add (q, (u8 *) & evt, 0 /* do wait for mutex */ );
78 
79  return 0;
80 }
81 
82 /* *INDENT-OFF* */
84  .session_accept_callback = builtin_session_create_callback,
85  .session_disconnect_callback = builtin_session_disconnect_callback,
86  .builtin_server_rx_callback = builtin_server_rx_callback
87 };
88 /* *INDENT-ON* */
89 
90 static int
92 {
93  vnet_bind_args_t _a, *a = &_a;
94  char segment_name[128];
95  u32 segment_name_length;
96  int rv;
97  u64 options[16];
98 
99  segment_name_length = ARRAY_LEN (segment_name);
100 
101  memset (a, 0, sizeof (*a));
102  memset (options, 0, sizeof (options));
103 
104  a->uri = (char *) uri;
105  a->api_client_index = ~0; /* built-in server */
106  a->segment_name = segment_name;
107  a->segment_name_length = segment_name_length;
108  a->session_cb_vft = &builtin_server;
109 
110  options[SESSION_OPTIONS_ACCEPT_COOKIE] = 0x12345678;
111  options[SESSION_OPTIONS_SEGMENT_SIZE] = (2 << 30); /*$$$$ config / arg */
112  a->options = options;
113 
114  rv = vnet_bind_uri (a);
115 
116  return rv;
117 }
118 
119 static int
121 {
122  int rv;
123 
124  rv = vnet_unbind_uri ((char *) uri, ~0 /* client_index */ );
125 
126  return rv;
127 }
128 
129 static clib_error_t *
131 {
133  u32 num_threads;
134 
135  num_threads = 1 /* main thread */ + vtm->n_threads;
136 
137  vec_validate (copy_buffers, num_threads - 1);
138  return 0;
139 }
140 
142 
143 static clib_error_t *
145  unformat_input_t * input,
146  vlib_cli_command_t * cmd)
147 {
148  u8 *uri = 0;
149  int rv;
150 
152  {
153  if (unformat (input, "uri %s", &uri))
154  ;
155  else
156  break;
157  }
158 
159  if (uri == 0)
160  return clib_error_return (0, "uri to bind not specified...");
161 
162  rv = bind_builtin_uri_server (uri);
163 
164  vec_free (uri);
165 
166  switch (rv)
167  {
168  case 0:
169  break;
170 
171  default:
172  return clib_error_return (0, "bind_uri_server returned %d", rv);
173  break;
174  }
175 
176  return 0;
177 }
178 
179 /* *INDENT-OFF* */
180 VLIB_CLI_COMMAND (builtin_uri_bind_command, static) =
181 {
182  .path = "builtin uri bind",
183  .short_help = "builtin uri bind",
184  .function = builtin_uri_bind_command_fn,
185 };
186 /* *INDENT-ON* */
187 
188 static clib_error_t *
190  unformat_input_t * input,
191  vlib_cli_command_t * cmd)
192 {
193  u8 *uri = 0;
194  int rv;
195 
197  {
198  if (unformat (input, "uri %s", &uri))
199  ;
200  else
201  break;
202  }
203 
204  if (uri == 0)
205  return clib_error_return (0, "uri to unbind not specified...");
206 
207  rv = unbind_builtin_uri_server (uri);
208 
209  vec_free (uri);
210 
211  switch (rv)
212  {
213  case 0:
214  break;
215 
216  default:
217  return clib_error_return (0, "unbind_uri_server returned %d", rv);
218  break;
219  }
220 
221  return 0;
222 }
223 
224 /* *INDENT-OFF* */
225 VLIB_CLI_COMMAND (builtin_uri_unbind_command, static) =
226 {
227  .path = "builtin uri unbind",
228  .short_help = "builtin uri unbind",
229  .function = builtin_uri_unbind_command_fn,
230 };
231 /* *INDENT-ON* */
232 
233 /*
234  * fd.io coding-style-patch-verification: ON
235  *
236  * Local Variables:
237  * eval: (c-set-style "gnu")
238  * End:
239  */
#define vec_validate(V, I)
Make sure vector is long enough for given index (no header, unspecified alignment) ...
Definition: vec.h:436
int svm_fifo_enqueue_nowait(svm_fifo_t *f, int pid, u32 max_bytes, u8 *copy_from_here)
Definition: svm_fifo.c:359
a
Definition: bitmap.h:516
static int builtin_session_create_callback(stream_session_t *s)
int vnet_bind_uri(vnet_bind_args_t *a)
int vnet_unbind_uri(char *uri, u32 api_client_index)
static session_cb_vft_t builtin_server
static u32 svm_fifo_max_enqueue(svm_fifo_t *f)
Definition: svm_fifo.h:104
struct _stream_session_t stream_session_t
#define VLIB_INIT_FUNCTION(x)
Definition: init.h:111
static u32 svm_fifo_max_dequeue(svm_fifo_t *f)
Definition: svm_fifo.h:98
struct _stream_session_cb_vft session_cb_vft_t
#define clib_error_return(e, args...)
Definition: error.h:111
unsigned long u64
Definition: types.h:89
int unix_shared_memory_queue_add(unix_shared_memory_queue_t *q, u8 *elem, int nowait)
void builtin_session_disconnect_callback(stream_session_t *s)
struct _unformat_input_t unformat_input_t
static unix_shared_memory_queue_t * session_manager_get_vpp_event_queue(u32 thread_index)
Definition: session.h:242
#define UNFORMAT_END_OF_INPUT
Definition: format.h:143
vlib_main_t * vm
Definition: buffer.c:276
#define vec_free(V)
Free vector&#39;s memory (no header).
Definition: vec.h:340
static int unbind_builtin_uri_server(u8 *uri)
#define ARRAY_LEN(x)
Definition: clib.h:59
#define VLIB_CLI_COMMAND(x,...)
Definition: cli.h:154
static clib_error_t * builtin_server_init(vlib_main_t *vm)
u8 ** copy_buffers
per-worker built-in server copy buffers
#define ASSERT(truth)
unsigned int u32
Definition: types.h:88
void stream_session_disconnect(stream_session_t *s)
Disconnect session and propagate to transport.
Definition: session.c:1193
int builtin_server_rx_callback(stream_session_t *s, session_fifo_event_t *e)
unsigned char u8
Definition: types.h:56
static int bind_builtin_uri_server(u8 *uri)
static vlib_thread_main_t * vlib_get_thread_main()
Definition: global_funcs.h:32
int svm_fifo_dequeue_nowait(svm_fifo_t *f, int pid, u32 max_bytes, u8 *copy_here)
Definition: svm_fifo.c:484
static clib_error_t * builtin_uri_bind_command_fn(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
struct _vnet_bind_args_t vnet_bind_args_t
static clib_error_t * builtin_uri_unbind_command_fn(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
uword unformat(unformat_input_t *i, const char *fmt,...)
Definition: unformat.c:971
static uword unformat_check_input(unformat_input_t *i)
Definition: format.h:169
struct _unix_shared_memory_queue unix_shared_memory_queue_t