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