src/vnet/session/session_types.h

   1 /*
   2  * Copyright (c) 2017-2019 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_SESSION_TYPES_H_
  17 #define SRC_VNET_SESSION_SESSION_TYPES_H_
  18
  19 #include <svm/svm_fifo.h>
  20 #include <vnet/session/transport_types.h>
  21
  22 #define SESSION_INVALID_INDEX ((u32)~0)
  23 #define SESSION_INVALID_HANDLE ((u64)~0)
  24 #define SESSION_CTRL_MSG_MAX_SIZE 84
  25
  26 #define foreach_session_endpoint_fields                         \
  27   foreach_transport_endpoint_cfg_fields                         \
  28   _(u8, transport_proto)                                        \
  29
  30 typedef struct _session_endpoint
  31 {
  32 #define _(type, name) type name;
  33   foreach_session_endpoint_fields
  34 #undef _
  35 } session_endpoint_t;
  36
  37 typedef struct _session_endpoint_cfg
  38 {
  39 #define _(type, name) type name;
  40   foreach_session_endpoint_fields
  41 #undef _
  42   u32 app_wrk_index;
  43   u32 opaque;
  44   u32 ns_index;
  45   u8 original_tp;
  46   u8 *hostname;
  47   u64 parent_handle;
  48   u32 ckpair_index;
  49   u8 crypto_engine;
  50   u8 flags;
  51 } session_endpoint_cfg_t;
  52
  53 #define SESSION_IP46_ZERO                       \
  54 {                                               \
  55     .ip6 = {                                    \
  56         { 0, 0, },                              \
  57     },                                          \
  58 }
  59
  60 #define TRANSPORT_ENDPOINT_NULL                 \
  61 {                                               \
  62   .sw_if_index = ENDPOINT_INVALID_INDEX,        \
  63   .ip = SESSION_IP46_ZERO,                      \
  64   .fib_index = ENDPOINT_INVALID_INDEX,          \
  65   .is_ip4 = 0,                                  \
  66   .port = 0,                                    \
  67 }
  68 #define SESSION_ENDPOINT_NULL                   \
  69 {                                               \
  70   .sw_if_index = ENDPOINT_INVALID_INDEX,        \
  71   .ip = SESSION_IP46_ZERO,                      \
  72   .fib_index = ENDPOINT_INVALID_INDEX,          \
  73   .is_ip4 = 0,                                  \
  74   .port = 0,                                    \
  75   .peer = TRANSPORT_ENDPOINT_NULL,              \
  76   .transport_proto = 0,                         \
  77 }
  78 #define SESSION_ENDPOINT_CFG_NULL               \
  79 {                                               \
  80   .sw_if_index = ENDPOINT_INVALID_INDEX,        \
  81   .ip = SESSION_IP46_ZERO,                      \
  82   .fib_index = ENDPOINT_INVALID_INDEX,          \
  83   .is_ip4 = 0,                                  \
  84   .port = 0,                                    \
  85   .peer = TRANSPORT_ENDPOINT_NULL,              \
  86   .transport_proto = 0,                         \
  87   .app_wrk_index = ENDPOINT_INVALID_INDEX,      \
  88   .opaque = ENDPOINT_INVALID_INDEX,             \
  89   .hostname = 0,                                \
  90   .parent_handle = SESSION_INVALID_HANDLE,      \
  91   .ckpair_index = 0                             \
  92 }
  93
  94 #define session_endpoint_to_transport(_sep) ((transport_endpoint_t *)_sep)
  95 #define session_endpoint_to_transport_cfg(_sep)         \
  96   ((transport_endpoint_cfg_t *)_sep)
  97
  98 always_inline u8
  99 session_endpoint_fib_proto (session_endpoint_t * sep)
 100 {
 101   return sep->is_ip4 ? FIB_PROTOCOL_IP4 : FIB_PROTOCOL_IP6;
 102 }
 103
 104 static inline u8
 105 session_endpoint_is_local (session_endpoint_t * sep)
 106 {
 107   return (ip_is_zero (&sep->ip, sep->is_ip4)
 108           || ip_is_local_host (&sep->ip, sep->is_ip4));
 109 }
 110
 111 static inline u8
 112 session_endpoint_is_zero (session_endpoint_t * sep)
 113 {
 114   return ip_is_zero (&sep->ip, sep->is_ip4);
 115 }
 116
 117 typedef u8 session_type_t;
 118 typedef u64 session_handle_t;
 119
 120 typedef enum
 121 {
 122   SESSION_CLEANUP_TRANSPORT,
 123   SESSION_CLEANUP_SESSION,
 124 } session_cleanup_ntf_t;
 125
 126 typedef enum session_ft_action_
 127 {
 128   SESSION_FT_ACTION_ENQUEUED,
 129   SESSION_FT_ACTION_DEQUEUED,
 130   SESSION_FT_ACTION_N_ACTIONS
 131 } session_ft_action_t;
 132
 133 /*
 134  * Session states
 135  */
 136 #define foreach_session_state                           \
 137   _(CREATED, "created")                                 \
 138   _(LISTENING, "listening")                             \
 139   _(CONNECTING, "connecting")                           \
 140   _(ACCEPTING, "accepting")                             \
 141   _(READY, "ready")                                     \
 142   _(OPENED, "opened")                                   \
 143   _(TRANSPORT_CLOSING, "transport-closing")             \
 144   _(CLOSING, "closing")                                 \
 145   _(APP_CLOSED, "app-closed")                           \
 146   _(TRANSPORT_CLOSED, "transport-closed")               \
 147   _(CLOSED, "closed")                                   \
 148   _(TRANSPORT_DELETED, "transport-deleted")             \
 149
 150 typedef enum
 151 {
 152 #define _(sym, str) SESSION_STATE_ ## sym,
 153   foreach_session_state
 154 #undef _
 155     SESSION_N_STATES,
 156 } session_state_t;
 157
 158 #define foreach_session_flag                            \
 159   _(RX_EVT, "rx-event")                                 \
 160   _(PROXY, "proxy")                                     \
 161   _(CUSTOM_TX, "custom-tx")                             \
 162   _(IS_MIGRATING, "migrating")                          \
 163   _(UNIDIRECTIONAL, "unidirectional")                   \
 164   _(CUSTOM_FIFO_TUNING, "custom-fifo-tuning")           \
 165
 166 typedef enum session_flags_bits_
 167 {
 168 #define _(sym, str) SESSION_F_BIT_ ## sym,
 169   foreach_session_flag
 170 #undef _
 171   SESSION_N_FLAGS
 172 } session_flag_bits_t;
 173
 174 typedef enum session_flags_
 175 {
 176 #define _(sym, str) SESSION_F_ ## sym = 1 << SESSION_F_BIT_ ## sym,
 177   foreach_session_flag
 178 #undef _
 179 } session_flags_t;
 180
 181 typedef struct session_
 182 {
 183   /** Pointers to rx/tx buffers. Once allocated, these do not move */
 184   svm_fifo_t *rx_fifo;
 185   svm_fifo_t *tx_fifo;
 186
 187   /** Type built from transport and network protocol types */
 188   session_type_t session_type;
 189
 190   /** State in session layer state machine. See @ref session_state_t */
 191   volatile u8 session_state;
 192
 193   /** Index in thread pool where session was allocated */
 194   u32 session_index;
 195
 196   /** Index of the app worker that owns the session */
 197   u32 app_wrk_index;
 198
 199   /** Index of the thread that allocated the session */
 200   u8 thread_index;
 201
 202   /** Session flags. See @ref session_flags_t */
 203   u32 flags;
 204
 205   /** Index of the transport connection associated to the session */
 206   u32 connection_index;
 207
 208   /** Index of application that owns the listener. Set only if a listener */
 209   u32 app_index;
 210
 211   union
 212   {
 213     /** Parent listener session index if the result of an accept */
 214     session_handle_t listener_handle;
 215
 216     /** App listener index in app's listener pool if a listener */
 217     u32 al_index;
 218   };
 219
 220   /** Opaque, for general use */
 221   u32 opaque;
 222
 223     CLIB_CACHE_LINE_ALIGN_MARK (pad);
 224 } session_t;
 225
 226 always_inline session_type_t
 227 session_type_from_proto_and_ip (transport_proto_t proto, u8 is_ip4)
 228 {
 229   return (proto << 1 | is_ip4);
 230 }
 231
 232 always_inline transport_proto_t
 233 session_type_transport_proto (session_type_t st)
 234 {
 235   return (st >> 1);
 236 }
 237
 238 always_inline u8
 239 session_type_is_ip4 (session_type_t st)
 240 {
 241   return (st & 1);
 242 }
 243
 244 always_inline transport_proto_t
 245 session_get_transport_proto (session_t * s)
 246 {
 247   return (s->session_type >> 1);
 248 }
 249
 250 always_inline fib_protocol_t
 251 session_get_fib_proto (session_t * s)
 252 {
 253   u8 is_ip4 = s->session_type & 1;
 254   return (is_ip4 ? FIB_PROTOCOL_IP4 : FIB_PROTOCOL_IP6);
 255 }
 256
 257 always_inline u8
 258 session_has_transport (session_t * s)
 259 {
 260   return (session_get_transport_proto (s) != TRANSPORT_PROTO_NONE);
 261 }
 262
 263 static inline transport_service_type_t
 264 session_transport_service_type (session_t * s)
 265 {
 266   transport_proto_t tp;
 267   tp = session_get_transport_proto (s);
 268   return transport_protocol_service_type (tp);
 269 }
 270
 271 static inline transport_tx_fn_type_t
 272 session_transport_tx_fn_type (session_t * s)
 273 {
 274   transport_proto_t tp;
 275   tp = session_get_transport_proto (s);
 276   return transport_protocol_tx_fn_type (tp);
 277 }
 278
 279 static inline u8
 280 session_tx_is_dgram (session_t * s)
 281 {
 282   return (session_transport_tx_fn_type (s) == TRANSPORT_TX_DGRAM);
 283 }
 284
 285 always_inline session_handle_t
 286 session_handle (session_t * s)
 287 {
 288   return ((u64) s->thread_index << 32) | (u64) s->session_index;
 289 }
 290
 291 always_inline u32
 292 session_index_from_handle (session_handle_t handle)
 293 {
 294   return handle & 0xFFFFFFFF;
 295 }
 296
 297 always_inline u32
 298 session_thread_from_handle (session_handle_t handle)
 299 {
 300   return handle >> 32;
 301 }
 302
 303 always_inline void
 304 session_parse_handle (session_handle_t handle, u32 * index,
 305                       u32 * thread_index)
 306 {
 307   *index = session_index_from_handle (handle);
 308   *thread_index = session_thread_from_handle (handle);
 309 }
 310
 311 static inline session_handle_t
 312 session_make_handle (u32 session_index, u32 thread_index)
 313 {
 314   return (((u64) thread_index << 32) | (u64) session_index);
 315 }
 316
 317 typedef enum
 318 {
 319   SESSION_IO_EVT_RX,
 320   SESSION_IO_EVT_TX,
 321   SESSION_IO_EVT_TX_FLUSH,
 322   SESSION_IO_EVT_BUILTIN_RX,
 323   SESSION_IO_EVT_BUILTIN_TX,
 324   SESSION_CTRL_EVT_RPC,
 325   SESSION_CTRL_EVT_CLOSE,
 326   SESSION_CTRL_EVT_RESET,
 327   SESSION_CTRL_EVT_BOUND,
 328   SESSION_CTRL_EVT_UNLISTEN_REPLY,
 329   SESSION_CTRL_EVT_ACCEPTED,
 330   SESSION_CTRL_EVT_ACCEPTED_REPLY,
 331   SESSION_CTRL_EVT_CONNECTED,
 332   SESSION_CTRL_EVT_DISCONNECTED,
 333   SESSION_CTRL_EVT_DISCONNECTED_REPLY,
 334   SESSION_CTRL_EVT_RESET_REPLY,
 335   SESSION_CTRL_EVT_REQ_WORKER_UPDATE,
 336   SESSION_CTRL_EVT_WORKER_UPDATE,
 337   SESSION_CTRL_EVT_WORKER_UPDATE_REPLY,
 338   SESSION_CTRL_EVT_DISCONNECT,
 339   SESSION_CTRL_EVT_CONNECT,
 340   SESSION_CTRL_EVT_CONNECT_URI,
 341   SESSION_CTRL_EVT_LISTEN,
 342   SESSION_CTRL_EVT_LISTEN_URI,
 343   SESSION_CTRL_EVT_UNLISTEN,
 344   SESSION_CTRL_EVT_APP_DETACH,
 345   SESSION_CTRL_EVT_APP_ADD_SEGMENT,
 346   SESSION_CTRL_EVT_APP_DEL_SEGMENT,
 347   SESSION_CTRL_EVT_MIGRATED,
 348   SESSION_CTRL_EVT_CLEANUP,
 349 } session_evt_type_t;
 350
 351 #define foreach_session_ctrl_evt                                \
 352   _(LISTEN, listen)                                             \
 353   _(LISTEN_URI, listen_uri)                                     \
 354   _(BOUND, bound)                                               \
 355   _(UNLISTEN, unlisten)                                         \
 356   _(UNLISTEN_REPLY, unlisten_reply)                             \
 357   _(ACCEPTED, accepted)                                         \
 358   _(ACCEPTED_REPLY, accepted_reply)                             \
 359   _(CONNECT, connect)                                           \
 360   _(CONNECT_URI, connect_uri)                                   \
 361   _(CONNECTED, connected)                                       \
 362   _(DISCONNECT, disconnect)                                     \
 363   _(DISCONNECTED, disconnected)                                 \
 364   _(DISCONNECTED_REPLY, disconnected_reply)                     \
 365   _(RESET_REPLY, reset_reply)                                   \
 366   _(REQ_WORKER_UPDATE, req_worker_update)                       \
 367   _(WORKER_UPDATE, worker_update)                               \
 368   _(WORKER_UPDATE_REPLY, worker_update_reply)                   \
 369   _(APP_DETACH, app_detach)                                     \
 370   _(APP_ADD_SEGMENT, app_add_segment)                           \
 371   _(APP_DEL_SEGMENT, app_del_segment)                           \
 372   _(MIGRATED, migrated)                                         \
 373   _(CLEANUP, cleanup)                                           \
 374
 375 /* Deprecated and will be removed. Use types above */
 376 #define FIFO_EVENT_APP_RX SESSION_IO_EVT_RX
 377 #define FIFO_EVENT_APP_TX SESSION_IO_EVT_TX
 378 #define FIFO_EVENT_DISCONNECT SESSION_CTRL_EVT_CLOSE
 379 #define FIFO_EVENT_BUILTIN_RX SESSION_IO_EVT_BUILTIN_RX
 380 #define FIFO_EVENT_BUILTIN_TX SESSION_IO_EVT_BUILTIN_TX
 381
 382 typedef enum
 383 {
 384   SESSION_MQ_IO_EVT_RING,
 385   SESSION_MQ_CTRL_EVT_RING,
 386   SESSION_MQ_N_RINGS
 387 } session_mq_rings_e;
 388
 389 typedef struct
 390 {
 391   void *fp;
 392   void *arg;
 393 } session_rpc_args_t;
 394
 395 typedef struct
 396 {
 397   u8 event_type;
 398   u8 postponed;
 399   union
 400   {
 401     u32 session_index;
 402     session_handle_t session_handle;
 403     session_rpc_args_t rpc_args;
 404     u32 ctrl_data_index;
 405     struct
 406     {
 407       u8 data[0];
 408     };
 409   };
 410 } __clib_packed session_event_t;
 411
 412 #define SESSION_MSG_NULL { }
 413
 414 typedef struct session_dgram_pre_hdr_
 415 {
 416   u32 data_length;
 417   u32 data_offset;
 418 } session_dgram_pre_hdr_t;
 419
 420 typedef struct session_dgram_header_
 421 {
 422   u32 data_length;
 423   u32 data_offset;
 424   ip46_address_t rmt_ip;
 425   ip46_address_t lcl_ip;
 426   u16 rmt_port;
 427   u16 lcl_port;
 428   u8 is_ip4;
 429 } __clib_packed session_dgram_hdr_t;
 430
 431 #define SESSION_CONN_ID_LEN 37
 432 #define SESSION_CONN_HDR_LEN 45
 433
 434 STATIC_ASSERT (sizeof (session_dgram_hdr_t) == (SESSION_CONN_ID_LEN + 8),
 435                "session conn id wrong length");
 436 #endif /* SRC_VNET_SESSION_SESSION_TYPES_H_ */
 437
 438 /*
 439  * fd.io coding-style-patch-verification: ON
 440  *
 441  * Local Variables:
 442  * eval: (c-set-style "gnu")
 443  * End:
 444  */