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 86
  25 #define SESSION_CTRL_MSG_TX_MAX_SIZE 160
  26 #define SESSION_NODE_FRAME_SIZE 128
  27
  28 #define foreach_session_endpoint_fields                         \
  29   foreach_transport_endpoint_cfg_fields                         \
  30   _(u8, transport_proto)                                        \
  31
  32 typedef struct _session_endpoint
  33 {
  34 #define _(type, name) type name;
  35   foreach_session_endpoint_fields
  36 #undef _
  37 } session_endpoint_t;
  38
  39 #define foreach_session_endpoint_cfg_flags _ (PROXY_LISTEN, "proxy listener")
  40
  41 typedef enum session_endpoint_cfg_flags_bits_
  42 {
  43 #define _(sym, str) SESSION_ENDPT_CFG_F_BIT_##sym,
  44   foreach_session_endpoint_cfg_flags
  45 #undef _
  46 } __clib_packed session_endpoint_cfg_flags_bits_t;
  47
  48 typedef enum session_endpoint_cfg_flags_
  49 {
  50 #define _(sym, str)                                                           \
  51   SESSION_ENDPT_CFG_F_##sym = 1 << SESSION_ENDPT_CFG_F_BIT_##sym,
  52   foreach_session_endpoint_cfg_flags
  53 #undef _
  54 } __clib_packed session_endpoint_cfg_flags_t;
  55
  56 typedef struct _session_endpoint_cfg
  57 {
  58 #define _(type, name) type name;
  59   foreach_session_endpoint_fields
  60 #undef _
  61   u32 app_wrk_index;
  62   u32 opaque;
  63   u32 ns_index;
  64   u8 original_tp;
  65   u64 parent_handle;
  66   session_endpoint_cfg_flags_t flags;
  67   transport_endpt_ext_cfg_t *ext_cfg;
  68 } session_endpoint_cfg_t;
  69
  70 #define SESSION_IP46_ZERO                       \
  71 {                                               \
  72     .ip6 = {                                    \
  73         { 0, 0, },                              \
  74     },                                          \
  75 }
  76
  77 #define TRANSPORT_ENDPOINT_NULL                 \
  78 {                                               \
  79   .sw_if_index = ENDPOINT_INVALID_INDEX,        \
  80   .ip = SESSION_IP46_ZERO,                      \
  81   .fib_index = ENDPOINT_INVALID_INDEX,          \
  82   .is_ip4 = 0,                                  \
  83   .port = 0,                                    \
  84 }
  85 #define SESSION_ENDPOINT_NULL                   \
  86 {                                               \
  87   .sw_if_index = ENDPOINT_INVALID_INDEX,        \
  88   .ip = SESSION_IP46_ZERO,                      \
  89   .fib_index = ENDPOINT_INVALID_INDEX,          \
  90   .is_ip4 = 0,                                  \
  91   .port = 0,                                    \
  92   .peer = TRANSPORT_ENDPOINT_NULL,              \
  93   .transport_proto = 0,                         \
  94 }
  95 #define SESSION_ENDPOINT_CFG_NULL                                             \
  96   {                                                                           \
  97     .sw_if_index = ENDPOINT_INVALID_INDEX, .ip = SESSION_IP46_ZERO,           \
  98     .fib_index = ENDPOINT_INVALID_INDEX, .is_ip4 = 0, .port = 0,              \
  99     .peer = TRANSPORT_ENDPOINT_NULL, .transport_proto = 0,                    \
 100     .app_wrk_index = ENDPOINT_INVALID_INDEX,                                  \
 101     .opaque = ENDPOINT_INVALID_INDEX,                                         \
 102     .parent_handle = SESSION_INVALID_HANDLE, .ext_cfg = 0,                    \
 103   }
 104
 105 #define session_endpoint_to_transport(_sep) ((transport_endpoint_t *)_sep)
 106 #define session_endpoint_to_transport_cfg(_sep)         \
 107   ((transport_endpoint_cfg_t *)_sep)
 108
 109 always_inline u8
 110 session_endpoint_fib_proto (session_endpoint_t * sep)
 111 {
 112   return sep->is_ip4 ? FIB_PROTOCOL_IP4 : FIB_PROTOCOL_IP6;
 113 }
 114
 115 static inline u8
 116 session_endpoint_is_local (session_endpoint_t * sep)
 117 {
 118   return (ip_is_zero (&sep->ip, sep->is_ip4)
 119           || ip_is_local_host (&sep->ip, sep->is_ip4));
 120 }
 121
 122 static inline u8
 123 session_endpoint_is_zero (session_endpoint_t * sep)
 124 {
 125   return ip_is_zero (&sep->ip, sep->is_ip4);
 126 }
 127
 128 typedef u8 session_type_t;
 129 typedef u64 session_handle_t;
 130
 131 typedef enum
 132 {
 133   SESSION_CLEANUP_TRANSPORT,
 134   SESSION_CLEANUP_SESSION,
 135 } session_cleanup_ntf_t;
 136
 137 typedef enum session_ft_action_
 138 {
 139   SESSION_FT_ACTION_ENQUEUED,
 140   SESSION_FT_ACTION_DEQUEUED,
 141   SESSION_FT_ACTION_N_ACTIONS
 142 } session_ft_action_t;
 143
 144 /*
 145  * Session states
 146  */
 147 #define foreach_session_state                           \
 148   _(CREATED, "created")                                 \
 149   _(LISTENING, "listening")                             \
 150   _(CONNECTING, "connecting")                           \
 151   _(ACCEPTING, "accepting")                             \
 152   _(READY, "ready")                                     \
 153   _(OPENED, "opened")                                   \
 154   _(TRANSPORT_CLOSING, "transport-closing")             \
 155   _(CLOSING, "closing")                                 \
 156   _(APP_CLOSED, "app-closed")                           \
 157   _(TRANSPORT_CLOSED, "transport-closed")               \
 158   _(CLOSED, "closed")                                   \
 159   _(TRANSPORT_DELETED, "transport-deleted")             \
 160
 161 typedef enum
 162 {
 163 #define _(sym, str) SESSION_STATE_ ## sym,
 164   foreach_session_state
 165 #undef _
 166     SESSION_N_STATES,
 167 } session_state_t;
 168
 169 #define foreach_session_flag                                                  \
 170   _ (RX_EVT, "rx-event")                                                      \
 171   _ (PROXY, "proxy")                                                          \
 172   _ (CUSTOM_TX, "custom-tx")                                                  \
 173   _ (IS_MIGRATING, "migrating")                                               \
 174   _ (UNIDIRECTIONAL, "unidirectional")                                        \
 175   _ (CUSTOM_FIFO_TUNING, "custom-fifo-tuning")                                \
 176   _ (HALF_OPEN, "half-open")                                                  \
 177   _ (APP_CLOSED, "app-closed")                                                \
 178   _ (IS_CLESS, "connectionless")
 179
 180 typedef enum session_flags_bits_
 181 {
 182 #define _(sym, str) SESSION_F_BIT_ ## sym,
 183   foreach_session_flag
 184 #undef _
 185   SESSION_N_FLAGS
 186 } session_flag_bits_t;
 187
 188 typedef enum session_flags_
 189 {
 190 #define _(sym, str) SESSION_F_ ## sym = 1 << SESSION_F_BIT_ ## sym,
 191   foreach_session_flag
 192 #undef _
 193 } session_flags_t;
 194
 195 typedef struct session_
 196 {
 197   /** Pointers to rx/tx buffers. Once allocated, these do not move */
 198   svm_fifo_t *rx_fifo;
 199   svm_fifo_t *tx_fifo;
 200
 201   /** Type built from transport and network protocol types */
 202   session_type_t session_type;
 203
 204   /** State in session layer state machine. See @ref session_state_t */
 205   volatile u8 session_state;
 206
 207   /** Index in thread pool where session was allocated */
 208   u32 session_index;
 209
 210   /** Index of the app worker that owns the session */
 211   u32 app_wrk_index;
 212
 213   /** Index of the thread that allocated the session */
 214   u8 thread_index;
 215
 216   /** Session flags. See @ref session_flags_t */
 217   u32 flags;
 218
 219   /** Index of the transport connection associated to the session */
 220   u32 connection_index;
 221
 222   /** Index of application that owns the listener. Set only if a listener */
 223   u32 app_index;
 224
 225   union
 226   {
 227     /** Parent listener session index if the result of an accept */
 228     session_handle_t listener_handle;
 229
 230     /** App listener index in app's listener pool if a listener */
 231     u32 al_index;
 232
 233     /** Index in app worker's half-open table if a half-open */
 234     u32 ho_index;
 235   };
 236
 237   /** Opaque, for general use */
 238   u32 opaque;
 239
 240     CLIB_CACHE_LINE_ALIGN_MARK (pad);
 241 } session_t;
 242
 243 always_inline session_type_t
 244 session_type_from_proto_and_ip (transport_proto_t proto, u8 is_ip4)
 245 {
 246   return (proto << 1 | is_ip4);
 247 }
 248
 249 always_inline transport_proto_t
 250 session_type_transport_proto (session_type_t st)
 251 {
 252   return (st >> 1);
 253 }
 254
 255 always_inline u8
 256 session_type_is_ip4 (session_type_t st)
 257 {
 258   return (st & 1);
 259 }
 260
 261 always_inline transport_proto_t
 262 session_get_transport_proto (session_t * s)
 263 {
 264   return (s->session_type >> 1);
 265 }
 266
 267 always_inline fib_protocol_t
 268 session_get_fib_proto (session_t * s)
 269 {
 270   u8 is_ip4 = s->session_type & 1;
 271   return (is_ip4 ? FIB_PROTOCOL_IP4 : FIB_PROTOCOL_IP6);
 272 }
 273
 274 always_inline u8
 275 session_has_transport (session_t * s)
 276 {
 277   return (session_get_transport_proto (s) != TRANSPORT_PROTO_NONE);
 278 }
 279
 280 static inline transport_service_type_t
 281 session_transport_service_type (session_t * s)
 282 {
 283   transport_proto_t tp;
 284   tp = session_get_transport_proto (s);
 285   return transport_protocol_service_type (tp);
 286 }
 287
 288 static inline transport_tx_fn_type_t
 289 session_transport_tx_fn_type (session_t * s)
 290 {
 291   transport_proto_t tp;
 292   tp = session_get_transport_proto (s);
 293   return transport_protocol_tx_fn_type (tp);
 294 }
 295
 296 static inline u8
 297 session_tx_is_dgram (session_t * s)
 298 {
 299   return (session_transport_tx_fn_type (s) == TRANSPORT_TX_DGRAM);
 300 }
 301
 302 always_inline session_handle_t
 303 session_handle (session_t * s)
 304 {
 305   return ((u64) s->thread_index << 32) | (u64) s->session_index;
 306 }
 307
 308 always_inline u32
 309 session_index_from_handle (session_handle_t handle)
 310 {
 311   return handle & 0xFFFFFFFF;
 312 }
 313
 314 always_inline u32
 315 session_thread_from_handle (session_handle_t handle)
 316 {
 317   return handle >> 32;
 318 }
 319
 320 always_inline void
 321 session_parse_handle (session_handle_t handle, u32 * index,
 322                       u32 * thread_index)
 323 {
 324   *index = session_index_from_handle (handle);
 325   *thread_index = session_thread_from_handle (handle);
 326 }
 327
 328 static inline session_handle_t
 329 session_make_handle (u32 session_index, u32 data)
 330 {
 331   return (((u64) data << 32) | (u64) session_index);
 332 }
 333
 334 always_inline u32
 335 session_handle_index (session_handle_t ho_handle)
 336 {
 337   return (ho_handle & 0xffffffff);
 338 }
 339
 340 always_inline u32
 341 session_handle_data (session_handle_t ho_handle)
 342 {
 343   return (ho_handle >> 32);
 344 }
 345
 346 typedef enum
 347 {
 348   SESSION_IO_EVT_RX,
 349   SESSION_IO_EVT_TX,
 350   SESSION_IO_EVT_TX_FLUSH,
 351   SESSION_IO_EVT_BUILTIN_RX,
 352   SESSION_IO_EVT_TX_MAIN,
 353   SESSION_CTRL_EVT_RPC,
 354   SESSION_CTRL_EVT_HALF_CLOSE,
 355   SESSION_CTRL_EVT_CLOSE,
 356   SESSION_CTRL_EVT_RESET,
 357   SESSION_CTRL_EVT_BOUND,
 358   SESSION_CTRL_EVT_UNLISTEN_REPLY,
 359   SESSION_CTRL_EVT_ACCEPTED,
 360   SESSION_CTRL_EVT_ACCEPTED_REPLY,
 361   SESSION_CTRL_EVT_CONNECTED,
 362   SESSION_CTRL_EVT_DISCONNECTED,
 363   SESSION_CTRL_EVT_DISCONNECTED_REPLY,
 364   SESSION_CTRL_EVT_RESET_REPLY,
 365   SESSION_CTRL_EVT_REQ_WORKER_UPDATE,
 366   SESSION_CTRL_EVT_WORKER_UPDATE,
 367   SESSION_CTRL_EVT_WORKER_UPDATE_REPLY,
 368   SESSION_CTRL_EVT_SHUTDOWN,
 369   SESSION_CTRL_EVT_DISCONNECT,
 370   SESSION_CTRL_EVT_CONNECT,
 371   SESSION_CTRL_EVT_CONNECT_URI,
 372   SESSION_CTRL_EVT_LISTEN,
 373   SESSION_CTRL_EVT_LISTEN_URI,
 374   SESSION_CTRL_EVT_UNLISTEN,
 375   SESSION_CTRL_EVT_APP_DETACH,
 376   SESSION_CTRL_EVT_APP_ADD_SEGMENT,
 377   SESSION_CTRL_EVT_APP_DEL_SEGMENT,
 378   SESSION_CTRL_EVT_MIGRATED,
 379   SESSION_CTRL_EVT_CLEANUP,
 380   SESSION_CTRL_EVT_APP_WRK_RPC,
 381   SESSION_CTRL_EVT_TRANSPORT_ATTR,
 382   SESSION_CTRL_EVT_TRANSPORT_ATTR_REPLY,
 383   SESSION_CTRL_EVT_TRANSPORT_CLOSED,
 384   SESSION_CTRL_EVT_HALF_CLEANUP,
 385 } session_evt_type_t;
 386
 387 #define foreach_session_ctrl_evt                                              \
 388   _ (LISTEN, listen)                                                          \
 389   _ (LISTEN_URI, listen_uri)                                                  \
 390   _ (BOUND, bound)                                                            \
 391   _ (UNLISTEN, unlisten)                                                      \
 392   _ (UNLISTEN_REPLY, unlisten_reply)                                          \
 393   _ (ACCEPTED, accepted)                                                      \
 394   _ (ACCEPTED_REPLY, accepted_reply)                                          \
 395   _ (CONNECT, connect)                                                        \
 396   _ (CONNECT_URI, connect_uri)                                                \
 397   _ (CONNECTED, connected)                                                    \
 398   _ (SHUTDOWN, shutdown)                                                      \
 399   _ (DISCONNECT, disconnect)                                                  \
 400   _ (DISCONNECTED, disconnected)                                              \
 401   _ (DISCONNECTED_REPLY, disconnected_reply)                                  \
 402   _ (RESET_REPLY, reset_reply)                                                \
 403   _ (REQ_WORKER_UPDATE, req_worker_update)                                    \
 404   _ (WORKER_UPDATE, worker_update)                                            \
 405   _ (WORKER_UPDATE_REPLY, worker_update_reply)                                \
 406   _ (APP_DETACH, app_detach)                                                  \
 407   _ (APP_ADD_SEGMENT, app_add_segment)                                        \
 408   _ (APP_DEL_SEGMENT, app_del_segment)                                        \
 409   _ (MIGRATED, migrated)                                                      \
 410   _ (CLEANUP, cleanup)                                                        \
 411   _ (APP_WRK_RPC, app_wrk_rpc)                                                \
 412   _ (TRANSPORT_ATTR, transport_attr)                                          \
 413   _ (TRANSPORT_ATTR_REPLY, transport_attr_reply)                              \
 414 /* Deprecated and will be removed. Use types above */
 415 #define FIFO_EVENT_APP_RX SESSION_IO_EVT_RX
 416 #define FIFO_EVENT_APP_TX SESSION_IO_EVT_TX
 417 #define FIFO_EVENT_DISCONNECT SESSION_CTRL_EVT_CLOSE
 418 #define FIFO_EVENT_BUILTIN_RX SESSION_IO_EVT_BUILTIN_RX
 419
 420 typedef enum
 421 {
 422   SESSION_MQ_IO_EVT_RING,
 423   SESSION_MQ_CTRL_EVT_RING,
 424   SESSION_MQ_N_RINGS
 425 } session_mq_rings_e;
 426
 427 typedef struct
 428 {
 429   void *fp;
 430   void *arg;
 431 } session_rpc_args_t;
 432
 433 typedef struct
 434 {
 435   u8 event_type;
 436   u8 postponed;
 437   union
 438   {
 439     u32 session_index;
 440     session_handle_t session_handle;
 441     session_rpc_args_t rpc_args;
 442     u32 ctrl_data_index;
 443     u64 as_u64[2];
 444     struct
 445     {
 446       u8 data[0];
 447     };
 448   };
 449 } __clib_packed session_event_t;
 450
 451 #define SESSION_MSG_NULL { }
 452
 453 typedef struct session_dgram_pre_hdr_
 454 {
 455   u32 data_length;
 456   u32 data_offset;
 457 } session_dgram_pre_hdr_t;
 458
 459 typedef struct session_dgram_header_
 460 {
 461   u32 data_length;
 462   u32 data_offset;
 463   ip46_address_t rmt_ip;
 464   ip46_address_t lcl_ip;
 465   u16 rmt_port;
 466   u16 lcl_port;
 467   u8 is_ip4;
 468   u16 gso_size;
 469 } __clib_packed session_dgram_hdr_t;
 470
 471 #define SESSION_CONN_ID_LEN 37
 472 #define SESSION_CONN_HDR_LEN 47
 473 STATIC_ASSERT (sizeof (session_dgram_hdr_t) == (SESSION_CONN_ID_LEN + 10),
 474                "session conn id wrong length");
 475
 476 #define foreach_session_error                                                 \
 477   _ (NONE, "no error")                                                        \
 478   _ (UNKNOWN, "generic/unknown error")                                        \
 479   _ (REFUSED, "refused")                                                      \
 480   _ (TIMEDOUT, "timedout")                                                    \
 481   _ (ALLOC, "obj/memory allocation error")                                    \
 482   _ (OWNER, "object not owned by application")                                \
 483   _ (NOROUTE, "no route")                                                     \
 484   _ (NOINTF, "no resolving interface")                                        \
 485   _ (NOIP, "no ip for lcl interface")                                         \
 486   _ (NOPORT, "no lcl port")                                                   \
 487   _ (NOSUPPORT, "not supported")                                              \
 488   _ (NOLISTEN, "not listening")                                               \
 489   _ (NOSESSION, "session does not exist")                                     \
 490   _ (NOAPP, "app not attached")                                               \
 491   _ (APP_ATTACHED, "app already attached")                                    \
 492   _ (PORTINUSE, "lcl port in use")                                            \
 493   _ (IPINUSE, "ip in use")                                                    \
 494   _ (ALREADY_LISTENING, "ip port pair already listened on")                   \
 495   _ (ADDR_NOT_IN_USE, "address not in use")                                   \
 496   _ (INVALID, "invalid value")                                                \
 497   _ (INVALID_RMT_IP, "invalid remote ip")                                     \
 498   _ (INVALID_APPWRK, "invalid app worker")                                    \
 499   _ (INVALID_NS, "invalid namespace")                                         \
 500   _ (SEG_NO_SPACE, "Couldn't allocate a fifo pair")                           \
 501   _ (SEG_NO_SPACE2, "Created segment, couldn't allocate a fifo pair")         \
 502   _ (SEG_CREATE, "Couldn't create a new segment")                             \
 503   _ (FILTERED, "session filtered")                                            \
 504   _ (SCOPE, "scope not supported")                                            \
 505   _ (BAPI_NO_FD, "bapi doesn't have a socket fd")                             \
 506   _ (BAPI_SEND_FD, "couldn't send fd over bapi socket fd")                    \
 507   _ (BAPI_NO_REG, "app bapi registration not found")                          \
 508   _ (MQ_MSG_ALLOC, "failed to alloc mq msg")                                  \
 509   _ (TLS_HANDSHAKE, "failed tls handshake")                                   \
 510   _ (EVENTFD_ALLOC, "failed to alloc eventfd")                                \
 511   _ (NOEXTCFG, "no extended transport config")                                \
 512   _ (NOCRYPTOENG, "no crypto engine")                                         \
 513   _ (NOCRYPTOCKP, "cert key pair not found ")                                 \
 514   _ (LOCAL_CONNECT, "could not connect with local scope")                     \
 515   _ (WRONG_NS_SECRET, "wrong ns secret")                                      \
 516   _ (SYSCALL, "system call error")                                            \
 517   _ (TRANSPORT_NO_REG, "transport was not registered")
 518
 519 typedef enum session_error_p_
 520 {
 521 #define _(sym, str) SESSION_EP_##sym,
 522   foreach_session_error
 523 #undef _
 524   SESSION_N_ERRORS
 525 } session_error_p_t;
 526
 527 typedef enum session_error_
 528 {
 529 #define _(sym, str) SESSION_E_##sym = -SESSION_EP_##sym,
 530   foreach_session_error
 531 #undef _
 532 } session_error_t;
 533
 534 #define SESSION_CLI_ID_LEN "60"
 535 #define SESSION_CLI_STATE_LEN "15"
 536
 537 /* Maintained for compatibility. Will be deprecated */
 538 #define SESSION_ERROR_SEG_CREATE SESSION_E_SEG_CREATE
 539 #define SESSION_ERROR_NO_SPACE SESSION_E_SEG_NO_SPACE
 540 #define SESSION_ERROR_NEW_SEG_NO_SPACE SESSION_E_SEG_NO_SPACE2
 541
 542 #endif /* SRC_VNET_SESSION_SESSION_TYPES_H_ */
 543
 544 /*
 545  * fd.io coding-style-patch-verification: ON
 546  *
 547  * Local Variables:
 548  * eval: (c-set-style "gnu")
 549  * End:
 550  */