src/vnet/session/application.h

   1 /*
   2  * Copyright (c) 2017 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 #ifndef SRC_VNET_SESSION_APPLICATION_H_
  17 #define SRC_VNET_SESSION_APPLICATION_H_
  18
  19 #include <vnet/vnet.h>
  20 #include <vnet/session/session.h>
  21 #include <vnet/session/segment_manager.h>
  22 #include <vnet/session/application_namespace.h>
  23
  24 typedef struct _stream_session_cb_vft
  25 {
  26   /** Notify server of new segment */
  27   int (*add_segment_callback) (u32 api_client_index,
  28                                const ssvm_private_t * ssvm_seg);
  29   /** Notify server of new segment */
  30   int (*del_segment_callback) (u32 api_client_index,
  31                                const ssvm_private_t * ssvm_seg);
  32
  33   /** Notify server of newly accepted session */
  34   int (*session_accept_callback) (stream_session_t * new_session);
  35
  36   /** Connection request callback */
  37   int (*session_connected_callback) (u32 app_index, u32 opaque,
  38                                      stream_session_t * s, u8 code);
  39
  40   /** Notify app that session is closing */
  41   void (*session_disconnect_callback) (stream_session_t * s);
  42
  43   /** Notify app that session was reset */
  44   void (*session_reset_callback) (stream_session_t * s);
  45
  46   /** Direct RX callback for built-in application */
  47   int (*builtin_app_rx_callback) (stream_session_t * session);
  48
  49   /** Direct TX callback for built-in application */
  50   int (*builtin_app_tx_callback) (stream_session_t * session);
  51
  52 } session_cb_vft_t;
  53
  54 typedef struct _application
  55 {
  56   /** Index in server pool */
  57   u32 index;
  58
  59   /** Flags */
  60   u32 flags;
  61
  62   /*
  63    * Binary API interface to external app
  64    */
  65
  66   /** Binary API connection index, ~0 if internal */
  67   u32 api_client_index;
  68
  69   /** Namespace the application belongs to */
  70   u32 ns_index;
  71
  72   /** Application listens for events on this svm queue */
  73   svm_queue_t *event_queue;
  74
  75   /*
  76    * Callbacks: shoulder-taps for the server/client
  77    */
  78
  79   session_cb_vft_t cb_fns;
  80
  81   /*
  82    * ssvm (fifo) segment management
  83    */
  84   /** Segment manager used for outgoing connects issued by the app */
  85   u32 connects_seg_manager;
  86
  87   /** Lookup tables for listeners. Value is segment manager index */
  88   uword *listeners_table;
  89
  90   /**
  91    * First segment manager has in the the first segment the application's
  92    * event fifo. Depending on what the app does, it may be either used for
  93    * a listener or for connects.
  94    */
  95   u32 first_segment_manager;
  96   u8 first_segment_manager_in_use;
  97
  98   /** Segment manager properties. Shared by all segment managers */
  99   segment_manager_properties_t sm_properties;
 100
 101   u16 proxied_transports;
 102
 103   /*
 104    * Local "cut through" connections specific
 105    */
 106
 107   /** Segment manager used for incoming "cut through" connects */
 108   u32 local_segment_manager;
 109
 110   /** Pool of local listen sessions */
 111   local_session_t *local_listen_sessions;
 112
 113   /** Pool of local sessions the app owns (as a server) */
 114   local_session_t *local_sessions;
 115
 116   /** Hash table of the app's local connects */
 117   uword *local_connects;
 118
 119   /*
 120    * TLS Specific
 121    */
 122
 123   /** Certificate to be used for listen sessions */
 124   u8 *tls_cert;
 125
 126   /** PEM encoded key */
 127   u8 *tls_key;
 128 } application_t;
 129
 130 #define APP_INVALID_INDEX ((u32)~0)
 131 #define APP_NS_INVALID_INDEX ((u32)~0)
 132 #define APP_INVALID_SEGMENT_MANAGER_INDEX ((u32) ~0)
 133
 134 application_t *application_new ();
 135 int application_init (application_t * app, u32 api_client_index,
 136                       u64 * options, session_cb_vft_t * cb_fns);
 137 void application_del (application_t * app);
 138 application_t *application_get (u32 index);
 139 application_t *application_get_if_valid (u32 index);
 140 application_t *application_lookup (u32 api_client_index);
 141 u32 application_get_index (application_t * app);
 142
 143 int application_start_listen (application_t * app,
 144                               session_endpoint_t * tep,
 145                               session_handle_t * handle);
 146 int application_start_local_listen (application_t * server,
 147                                     session_endpoint_t * sep,
 148                                     session_handle_t * handle);
 149 int application_stop_listen (application_t * srv, session_handle_t handle);
 150 int application_stop_local_listen (application_t * server,
 151                                    session_handle_t listener_handle);
 152 int application_open_session (application_t * app, session_endpoint_t * tep,
 153                               u32 api_context);
 154 int application_api_queue_is_full (application_t * app);
 155
 156 segment_manager_t *application_get_listen_segment_manager (application_t *
 157                                                            app,
 158                                                            stream_session_t *
 159                                                            ls);
 160 segment_manager_t *application_get_connect_segment_manager (application_t *
 161                                                             app);
 162 int application_alloc_connects_segment_manager (application_t * app);
 163
 164 int application_is_proxy (application_t * app);
 165 int application_is_builtin (application_t * app);
 166 int application_is_builtin_proxy (application_t * app);
 167 int application_add_segment_notify (u32 app_index, ssvm_private_t * fs);
 168 u32 application_session_table (application_t * app, u8 fib_proto);
 169 u32 application_local_session_table (application_t * app);
 170 u8 *application_name_from_index (u32 app_index);
 171
 172 u8 application_has_local_scope (application_t * app);
 173 u8 application_has_global_scope (application_t * app);
 174 u32 application_n_listeners (application_t * app);
 175 stream_session_t *application_first_listener (application_t * app,
 176                                               u8 fib_proto,
 177                                               u8 transport_proto);
 178 void application_setup_proxy (application_t * app);
 179 void application_remove_proxy (application_t * app);
 180
 181 segment_manager_properties_t *application_get_segment_manager_properties (u32
 182                                                                           app_index);
 183 segment_manager_properties_t
 184   * application_segment_manager_properties (application_t * app);
 185
 186 local_session_t *application_alloc_local_session (application_t * app);
 187 void application_free_local_session (application_t * app,
 188                                      local_session_t * ls);
 189 local_session_t *application_get_local_session (application_t * app,
 190                                                 u32 session_index);
 191 local_session_t *application_get_local_session_from_handle (session_handle_t
 192                                                             handle);
 193 int application_local_session_connect (u32 table_index,
 194                                        application_t * client,
 195                                        application_t * server,
 196                                        local_session_t * ll, u32 opaque);
 197 int application_local_session_connect_notify (local_session_t * ls);
 198 int application_local_session_disconnect (u32 app_index,
 199                                           local_session_t * ls);
 200 void application_local_sessions_del (application_t * app);
 201
 202 always_inline u32
 203 local_session_id (local_session_t * ll)
 204 {
 205   ASSERT (ll->app_index < (2 << 16) && ll->session_index < (2 << 16));
 206   return ((u32) ll->app_index << 16 | (u32) ll->session_index);
 207 }
 208
 209 always_inline void
 210 local_session_parse_id (u32 ls_id, u32 * app_index, u32 * session_index)
 211 {
 212   *app_index = ls_id >> 16;
 213   *session_index = ls_id & 0xFFF;
 214 }
 215
 216 always_inline void
 217 local_session_parse_handle (session_handle_t handle, u32 * server_index,
 218                             u32 * session_index)
 219 {
 220   u32 bottom;
 221   ASSERT ((handle >> 32) == SESSION_LOCAL_HANDLE_PREFIX);
 222   bottom = (handle & 0xFFFFFFFF);
 223   local_session_parse_id (bottom, server_index, session_index);
 224 }
 225
 226 always_inline session_handle_t
 227 application_local_session_handle (local_session_t * ls)
 228 {
 229   return ((u64) SESSION_LOCAL_HANDLE_PREFIX << 32)
 230     | (u64) local_session_id (ls);
 231 }
 232
 233 always_inline local_session_t *
 234 application_get_local_listen_session (application_t * app, u32 session_index)
 235 {
 236   return pool_elt_at_index (app->local_listen_sessions, session_index);
 237 }
 238
 239 always_inline local_session_t *
 240 application_get_local_listener_w_handle (session_handle_t handle)
 241 {
 242   u32 server_index, session_index;
 243   application_t *app;
 244   local_session_parse_handle (handle, &server_index, &session_index);
 245   app = application_get (server_index);
 246   return application_get_local_listen_session (app, session_index);
 247 }
 248
 249 always_inline u8
 250 application_local_session_listener_has_transport (local_session_t * ls)
 251 {
 252   transport_proto_t tp;
 253   tp = session_type_transport_proto (ls->listener_session_type);
 254   return (tp != TRANSPORT_PROTO_NONE);
 255 }
 256
 257 void send_local_session_disconnect_callback (u32 app_index,
 258                                              local_session_t * ls);
 259
 260 int application_connect (u32 client_index, u32 api_context,
 261                          session_endpoint_t * sep);
 262
 263 uword unformat_application_proto (unformat_input_t * input, va_list * args);
 264
 265 #endif /* SRC_VNET_SESSION_APPLICATION_H_ */
 266
 267 /*
 268  * fd.io coding-style-patch-verification: ON
 269  *
 270  * Local Variables:
 271  * eval: (c-set-style "gnu")
 272  * End:
 273  */