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:
7 * http://www.apache.org/licenses/LICENSE-2.0
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.
15 #include <vnet/session/application_interface.h>
17 #include <vnet/session/session.h>
18 #include <vlibmemory/api.h>
19 #include <vnet/dpo/load_balance.h>
22 VPP's application/session API bind/unbind/connect/disconnect calls
26 session_endpoint_is_local (session_endpoint_t * sep)
28 return (ip_is_zero (&sep->ip, sep->is_ip4)
29 || ip_is_local_host (&sep->ip, sep->is_ip4));
33 session_endpoint_is_zero (session_endpoint_t * sep)
35 return ip_is_zero (&sep->ip, sep->is_ip4);
39 session_endpoint_in_ns (session_endpoint_t * sep)
41 u8 is_zero = ip_is_zero (&sep->ip, sep->is_ip4);
42 if (!is_zero && sep->sw_if_index != ENDPOINT_INVALID_INDEX
43 && !ip_interface_has_address (sep->sw_if_index, &sep->ip, sep->is_ip4))
45 clib_warning ("sw_if_index %u not configured with ip %U",
46 sep->sw_if_index, format_ip46_address, &sep->ip,
50 return (is_zero || ip_is_local (sep->fib_index, &sep->ip, sep->is_ip4));
54 api_parse_session_handle (u64 handle, u32 * session_index, u32 * thread_index)
56 session_manager_main_t *smm = vnet_get_session_manager_main ();
57 stream_session_t *pool;
59 *thread_index = handle & 0xFFFFFFFF;
60 *session_index = handle >> 32;
62 if (*thread_index >= vec_len (smm->sessions))
63 return VNET_API_ERROR_INVALID_VALUE;
65 pool = smm->sessions[*thread_index];
67 if (pool_is_free_index (pool, *session_index))
68 return VNET_API_ERROR_INVALID_VALUE_2;
74 session_endpoint_update_for_app (session_endpoint_t * sep,
77 app_namespace_t *app_ns;
78 app_ns = app_namespace_get (app->ns_index);
81 /* Ask transport and network to bind to/connect using local interface
82 * that "supports" app's namespace. This will fix our local connection
85 sep->sw_if_index = app_ns->sw_if_index;
87 sep->is_ip4 ? app_ns->ip4_fib_index : app_ns->ip6_fib_index;
92 vnet_bind_i (u32 app_index, session_endpoint_t * sep, u64 * handle)
94 u64 lh, ll_handle = SESSION_INVALID_HANDLE;
99 app = application_get_if_valid (app_index);
102 SESSION_DBG ("app not attached");
103 return VNET_API_ERROR_APPLICATION_NOT_ATTACHED;
106 session_endpoint_update_for_app (sep, app);
107 if (!session_endpoint_in_ns (sep))
108 return VNET_API_ERROR_INVALID_VALUE_2;
110 table_index = application_session_table (app,
111 session_endpoint_fib_proto (sep));
112 lh = session_lookup_endpoint_listener (table_index, sep, 1);
113 if (lh != SESSION_INVALID_HANDLE)
114 return VNET_API_ERROR_ADDRESS_IN_USE;
117 * Add session endpoint to local session table. Only binds to "inaddr_any"
118 * (i.e., zero address) are added to local scope table.
120 if (application_has_local_scope (app) && session_endpoint_is_zero (sep))
122 if ((rv = application_start_local_listen (app, sep, handle)))
127 if (!application_has_global_scope (app))
128 return (ll_handle == SESSION_INVALID_HANDLE ? -1 : 0);
131 * Add session endpoint to global session table
134 /* Setup listen path down to transport */
135 rv = application_start_listen (app, sep, handle);
136 if (rv && ll_handle != SESSION_INVALID_HANDLE)
137 session_lookup_del_session_endpoint (table_index, sep);
140 * Store in local table listener the index of the transport layer
141 * listener. We'll need local listeners are hit and we need to
142 * return global handle
144 if (ll_handle != SESSION_INVALID_HANDLE)
147 stream_session_t *tl;
148 ll = application_get_local_listener_w_handle (ll_handle);
149 tl = listen_session_get_from_handle (*handle);
150 ll->transport_listener_index = tl->session_index;
156 vnet_unbind_i (u32 app_index, session_handle_t handle)
161 if (!(app = application_get_if_valid (app_index)))
163 SESSION_DBG ("app (%d) not attached", app_index);
164 return VNET_API_ERROR_APPLICATION_NOT_ATTACHED;
167 if (application_has_local_scope (app))
169 if ((rv = application_stop_local_listen (app, handle)))
174 * Clear the global scope table of the listener
176 if (application_has_global_scope (app))
177 return application_stop_listen (app, handle);
182 vnet_connect_i (u32 client_index, u32 api_context, session_endpoint_t * sep,
185 application_t *server, *client;
186 u32 table_index, server_index, li;
187 stream_session_t *listener;
191 if (session_endpoint_is_zero (sep))
192 return VNET_API_ERROR_INVALID_VALUE;
194 client = application_get (client_index);
195 session_endpoint_update_for_app (sep, client);
198 * First check the local scope for locally attached destinations.
199 * If we have local scope, we pass *all* connects through it since we may
200 * have special policy rules even for non-local destinations, think proxy.
202 if (application_has_local_scope (client))
204 table_index = application_local_session_table (client);
205 lh = session_lookup_local_endpoint (table_index, sep);
206 if (lh == SESSION_DROP_HANDLE)
207 return VNET_API_ERROR_APP_CONNECT_FILTERED;
209 if (lh == SESSION_INVALID_HANDLE)
212 local_session_parse_handle (lh, &server_index, &li);
215 * Break loop if rule in local table points to connecting app. This
216 * can happen if client is a generic proxy. Route connect through
217 * global table instead.
219 if (server_index != client_index)
221 server = application_get (server_index);
222 ll = application_get_local_listen_session (server, li);
223 return application_local_session_connect (table_index, client,
224 server, ll, api_context);
229 * If nothing found, check the global scope for locally attached
230 * destinations. Make sure first that we're allowed to.
234 if (session_endpoint_is_local (sep))
235 return VNET_API_ERROR_SESSION_CONNECT;
237 if (!application_has_global_scope (client))
238 return VNET_API_ERROR_APP_CONNECT_SCOPE;
240 table_index = application_session_table (client,
241 session_endpoint_fib_proto (sep));
242 listener = session_lookup_listener (table_index, sep);
245 server = application_get (listener->app_index);
247 return application_local_session_connect (table_index, client, server,
249 listener, api_context);
253 * Not connecting to a local server, propagate to transport
255 if (application_open_session (client, sep, api_context))
256 return VNET_API_ERROR_SESSION_CONNECT;
261 * unformat a vnet URI
263 * transport-proto://ip46-addr:port
264 * eg. tcp://ip46-addr:port
266 * u8 ip46_address[16];
267 * u16 port_in_host_byte_order;
268 * stream_session_type_t sst;
271 * if (unformat (input, "%U", unformat_vnet_uri, &ip46_address,
272 * &sst, &port, &fifo_name))
277 unformat_vnet_uri (unformat_input_t * input, va_list * args)
279 session_endpoint_t *sep = va_arg (*args, session_endpoint_t *);
280 u32 transport_proto = 0;
281 if (unformat (input, "%U://%U/%d", unformat_transport_proto,
282 &transport_proto, unformat_ip4_address, &sep->ip.ip4,
285 sep->transport_proto = transport_proto;
286 sep->port = clib_host_to_net_u16 (sep->port);
290 if (unformat (input, "%U://%U/%d", unformat_transport_proto,
291 &transport_proto, unformat_ip6_address, &sep->ip.ip6,
294 sep->transport_proto = transport_proto;
295 sep->port = clib_host_to_net_u16 (sep->port);
302 static u8 *cache_uri;
303 static session_endpoint_t *cache_sep;
306 parse_uri (char *uri, session_endpoint_t * sep)
308 unformat_input_t _input, *input = &_input;
310 if (cache_uri && !strncmp (uri, (char *) cache_uri, vec_len (cache_uri)))
317 uri = (char *) format (0, "%s%c", uri, 0);
320 unformat_init_string (input, uri, strlen (uri));
321 if (!unformat (input, "%U", unformat_vnet_uri, sep))
323 unformat_free (input);
324 return VNET_API_ERROR_INVALID_VALUE;
326 unformat_free (input);
328 vec_free (cache_uri);
329 cache_uri = (u8 *) uri;
331 clib_mem_free (cache_sep);
332 cache_sep = clib_mem_alloc (sizeof (*sep));
339 session_validate_namespace (u8 * namespace_id, u64 secret, u32 * app_ns_index)
341 app_namespace_t *app_ns;
342 if (vec_len (namespace_id) == 0)
344 /* Use default namespace */
349 *app_ns_index = app_namespace_index_from_id (namespace_id);
350 if (*app_ns_index == APP_NAMESPACE_INVALID_INDEX)
351 return VNET_API_ERROR_APP_INVALID_NS;
352 app_ns = app_namespace_get (*app_ns_index);
354 return VNET_API_ERROR_APP_INVALID_NS;
355 if (app_ns->ns_secret != secret)
356 return VNET_API_ERROR_APP_WRONG_NS_SECRET;
361 * Attach application to vpp
363 * Allocates a vpp app, i.e., a structure that keeps back pointers
364 * to external app and a segment manager for shared memory fifo based
365 * communication with the external app.
368 vnet_application_attach (vnet_app_attach_args_t * a)
370 svm_fifo_segment_private_t *fs;
371 application_t *app = 0;
372 segment_manager_t *sm;
373 u32 app_ns_index = 0;
377 app = application_lookup (a->api_client_index);
379 return clib_error_return_code (0, VNET_API_ERROR_APP_ALREADY_ATTACHED,
380 0, "app already attached");
382 secret = a->options[APP_OPTIONS_NAMESPACE_SECRET];
383 if ((rv = session_validate_namespace (a->namespace_id, secret,
385 return clib_error_return_code (0, rv, 0, "namespace validation: %d", rv);
386 a->options[APP_OPTIONS_NAMESPACE] = app_ns_index;
387 app = application_new ();
388 if ((rv = application_init (app, a->api_client_index, a->options,
390 return clib_error_return_code (0, rv, 0, "app init: %d", rv);
392 a->app_event_queue_address = pointer_to_uword (app->event_queue);
393 sm = segment_manager_get (app->first_segment_manager);
394 fs = segment_manager_get_segment_w_lock (sm, 0);
396 if (application_is_proxy (app))
397 application_setup_proxy (app);
399 ASSERT (vec_len (fs->ssvm.name) <= 128);
400 a->segment = &fs->ssvm;
401 a->app_index = app->index;
403 segment_manager_segment_reader_unlock (sm);
409 * Detach application from vpp
412 vnet_application_detach (vnet_app_detach_args_t * a)
415 app = application_get_if_valid (a->app_index);
419 clib_warning ("app not attached");
420 return VNET_API_ERROR_APPLICATION_NOT_ATTACHED;
423 application_del (app);
428 vnet_bind_uri (vnet_bind_args_t * a)
430 session_endpoint_t sep = SESSION_ENDPOINT_NULL;
433 rv = parse_uri (a->uri, &sep);
437 return vnet_bind_i (a->app_index, &sep, &a->handle);
441 vnet_unbind_uri (vnet_unbind_args_t * a)
443 stream_session_t *listener;
444 session_endpoint_t sep = SESSION_ENDPOINT_NULL;
447 rv = parse_uri (a->uri, &sep);
451 /* NOTE: only default table supported for uri */
452 listener = session_lookup_listener (0, &sep);
454 return VNET_API_ERROR_ADDRESS_NOT_IN_USE;
456 return vnet_unbind_i (a->app_index, listen_session_get_handle (listener));
460 vnet_connect_uri (vnet_connect_args_t * a)
462 session_endpoint_t sep_null = SESSION_ENDPOINT_NULL;
467 rv = parse_uri (a->uri, &a->sep);
469 return clib_error_return_code (0, rv, 0, "app init: %d", rv);
470 if ((rv = vnet_connect_i (a->app_index, a->api_context, &a->sep, a->mp)))
471 return clib_error_return_code (0, rv, 0, "connect failed");
476 vnet_disconnect_session (vnet_disconnect_args_t * a)
478 if (session_handle_is_local (a->handle))
481 ls = application_get_local_session_from_handle (a->handle);
482 if (ls->app_index != a->app_index && ls->client_index != a->app_index)
484 clib_warning ("app %u is neither client nor server for session %u",
485 a->app_index, a->app_index);
486 return VNET_API_ERROR_INVALID_VALUE;
488 return application_local_session_disconnect (a->app_index, ls);
493 s = session_get_from_handle_if_valid (a->handle);
494 if (!s || s->app_index != a->app_index)
495 return VNET_API_ERROR_INVALID_VALUE;
497 /* We're peeking into another's thread pool. Make sure */
498 ASSERT (s->session_index == session_index_from_handle (a->handle));
500 stream_session_disconnect (s);
506 vnet_bind (vnet_bind_args_t * a)
509 if ((rv = vnet_bind_i (a->app_index, &a->sep, &a->handle)))
510 return clib_error_return_code (0, rv, 0, "bind failed");
515 vnet_unbind (vnet_unbind_args_t * a)
518 if ((rv = vnet_unbind_i (a->app_index, a->handle)))
519 return clib_error_return_code (0, rv, 0, "unbind failed");
524 vnet_connect (vnet_connect_args_t * a)
527 if ((rv = vnet_connect_i (a->app_index, a->api_context, &a->sep, a->mp)))
528 return clib_error_return_code (0, rv, 0, "connect failed");
533 * fd.io coding-style-patch-verification: ON
536 * eval: (c-set-style "gnu")