X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fvnet%2Fsession%2Fsession.h;h=9d534aec19bee55fd9372740dc0873b273dd5e4d;hb=7fb0fe1;hp=f152a2be0e2e90b1e95250ed6d5c2387de275e2e;hpb=f6d68ed2db2bcd41c9b7ddde5e411073c1566c29;p=vpp.git diff --git a/src/vnet/session/session.h b/src/vnet/session/session.h index f152a2be0e2..9d534aec19b 100644 --- a/src/vnet/session/session.h +++ b/src/vnet/session/session.h @@ -15,13 +15,17 @@ #ifndef __included_session_h__ #define __included_session_h__ -#include -#include +#include +#include +#include #include #include +#include #define HALF_OPEN_LOOKUP_INVALID_VALUE ((u64)~0) #define INVALID_INDEX ((u32)~0) +#define SESSION_PROXY_LISTENER_INDEX ((u32)~0 - 1) +#define SESSION_LOCAL_HANDLE_PREFIX 0x7FFFFFFF /* TODO decide how much since we have pre-data as well */ #define MAX_HDRS_LEN 100 /* Max number of bytes for headers */ @@ -32,9 +36,32 @@ typedef enum FIFO_EVENT_APP_TX, FIFO_EVENT_TIMEOUT, FIFO_EVENT_DISCONNECT, - FIFO_EVENT_BUILTIN_RX + FIFO_EVENT_BUILTIN_RX, + FIFO_EVENT_RPC, } fifo_event_type_t; +static inline const char * +fifo_event_type_str (fifo_event_type_t et) +{ + switch (et) + { + case FIFO_EVENT_APP_RX: + return "FIFO_EVENT_APP_RX"; + case FIFO_EVENT_APP_TX: + return "FIFO_EVENT_APP_TX"; + case FIFO_EVENT_TIMEOUT: + return "FIFO_EVENT_TIMEOUT"; + case FIFO_EVENT_DISCONNECT: + return "FIFO_EVENT_DISCONNECT"; + case FIFO_EVENT_BUILTIN_RX: + return "FIFO_EVENT_BUILTIN_RX"; + case FIFO_EVENT_RPC: + return "FIFO_EVENT_RPC"; + default: + return "UNKNOWN FIFO EVENT"; + } +} + #define foreach_session_input_error \ _(NO_SESSION, "No session drops") \ _(NO_LISTENER, "No listener for dst port drops") \ @@ -44,7 +71,8 @@ _(FIFO_FULL, "Packets dropped for lack of rx fifo space") \ _(EVENT_FIFO_FULL, "Events not sent for lack of event fifo space") \ _(API_QUEUE_FULL, "Sessions not created for lack of API queue space") \ _(NEW_SEG_NO_SPACE, "Created segment, couldn't allocate a fifo pair") \ -_(NO_SPACE, "Couldn't allocate a fifo pair") +_(NO_SPACE, "Couldn't allocate a fifo pair") \ +_(SEG_CREATE, "Couldn't create a new segment") typedef enum { @@ -54,94 +82,27 @@ typedef enum SESSION_N_ERROR, } session_error_t; -/* Event queue input node static next indices */ -typedef enum +typedef struct { - SESSION_QUEUE_NEXT_DROP, - SESSION_QUEUE_NEXT_TCP_IP4_OUTPUT, - SESSION_QUEUE_NEXT_IP4_LOOKUP, - SESSION_QUEUE_NEXT_TCP_IP6_OUTPUT, - SESSION_QUEUE_NEXT_IP6_LOOKUP, - SESSION_QUEUE_N_NEXT, -} session_queue_next_t; + void *fp; + void *arg; +} rpc_args_t; -#define foreach_session_type \ - _(IP4_TCP, ip4_tcp) \ - _(IP4_UDP, ip4_udp) \ - _(IP6_TCP, ip6_tcp) \ - _(IP6_UDP, ip6_udp) - -typedef enum -{ -#define _(A, a) SESSION_TYPE_##A, - foreach_session_type -#undef _ - SESSION_N_TYPES, -} session_type_t; - -/* - * Application session state - */ -typedef enum -{ - SESSION_STATE_LISTENING, - SESSION_STATE_CONNECTING, - SESSION_STATE_READY, - SESSION_STATE_CLOSED, - SESSION_STATE_N_STATES, -} stream_session_state_t; +typedef u64 session_handle_t; /* *INDENT-OFF* */ typedef CLIB_PACKED (struct { union { svm_fifo_t * fifo; - u64 session_handle; + session_handle_t session_handle; + rpc_args_t rpc_args; }; u8 event_type; - u16 event_id; + u8 postponed; }) session_fifo_event_t; /* *INDENT-ON* */ -typedef struct _stream_session_t -{ - /** fifo pointers. Once allocated, these do not move */ - svm_fifo_t *server_rx_fifo; - svm_fifo_t *server_tx_fifo; - - /** svm segment index where fifos were allocated */ - u32 svm_segment_index; - - /** Type */ - u8 session_type; - - /** State */ - u8 session_state; - - u8 thread_index; - - /** used during unbind processing */ - u8 is_deleted; - - /** To avoid n**2 "one event per frame" check */ - u8 enqueue_epoch; - - /** Session index in per_thread pool */ - u32 session_index; - - /** Transport specific */ - u32 connection_index; - - /** Application specific */ - u32 pid; - - /** stream server pool index */ - u32 app_index; - - /** Parent listener session if the result of an accept */ - u32 listener_index; -} stream_session_t; - /* Forward definition */ typedef struct _session_manager_main session_manager_main_t; @@ -153,55 +114,85 @@ typedef int extern session_fifo_rx_fn session_tx_fifo_peek_and_snd; extern session_fifo_rx_fn session_tx_fifo_dequeue_and_snd; +extern session_fifo_rx_fn session_tx_fifo_dequeue_internal; + +u8 session_node_lookup_fifo_event (svm_fifo_t * f, session_fifo_event_t * e); struct _session_manager_main { - /** Lookup tables for established sessions and listeners */ - clib_bihash_16_8_t v4_session_hash; - clib_bihash_48_8_t v6_session_hash; - - /** Lookup tables for half-open sessions */ - clib_bihash_16_8_t v4_half_open_hash; - clib_bihash_48_8_t v6_half_open_hash; - /** Per worker thread session pools */ stream_session_t **sessions; - /** Pool of listen sessions. Same type as stream sessions to ease lookups */ - stream_session_t *listen_sessions[SESSION_N_TYPES]; - - /** Sparse vector to map dst port to stream server */ - u16 *stream_server_by_dst_port[SESSION_N_TYPES]; + /** Per worker-thread session pool peekers rw locks */ + clib_rwlock_t *peekers_rw_locks; - /** per-worker enqueue epoch counters */ - u8 *current_enqueue_epoch; + /** Per-proto, per-worker enqueue epoch counters */ + u32 *current_enqueue_epoch[TRANSPORT_N_PROTO]; - /** Per-worker thread vector of sessions to enqueue */ - u32 **session_indices_to_enqueue_by_thread; + /** Per-proto, per-worker thread vector of sessions to enqueue */ + u32 **session_to_enqueue[TRANSPORT_N_PROTO]; /** per-worker tx buffer free lists */ u32 **tx_buffers; /** Per worker-thread vector of partially read events */ - session_fifo_event_t **evts_partially_read; + session_fifo_event_t **free_event_vector; /** per-worker active event vectors */ - session_fifo_event_t **fifo_events; + session_fifo_event_t **pending_event_vector; + + /** per-worker postponed disconnects */ + session_fifo_event_t **pending_disconnects; /** vpp fifo event queue */ - unix_shared_memory_queue_t **vpp_event_queues; + svm_queue_t **vpp_event_queues; + + /** Event queues memfd segment initialized only if so configured */ + ssvm_private_t evt_qs_segment; /** Unique segment name counter */ u32 unique_segment_name_counter; /** Per transport rx function that can either dequeue or peek */ - session_fifo_rx_fn *session_tx_fns[SESSION_N_TYPES]; + session_fifo_rx_fn **session_tx_fns; + /** Per session type output nodes. Could optimize to group nodes by + * fib but lookup would then require session type parsing in session node. + * Trade memory for speed, for now */ + u32 *session_type_to_next; + + /** Session manager is enabled */ u8 is_enabled; - /* Convenience */ - vlib_main_t *vlib_main; - vnet_main_t *vnet_main; + /** vpp fifo event queue configured length */ + u32 configured_event_queue_length; + + /* + * Config parameters + */ + + /** Session ssvm segment configs*/ + uword session_baseva; + uword session_va_space_size; + u32 evt_qs_segment_size; + u8 evt_qs_use_memfd_seg; + + /** Session table size parameters */ + u32 configured_v4_session_table_buckets; + u32 configured_v4_session_table_memory; + u32 configured_v4_halfopen_table_buckets; + u32 configured_v4_halfopen_table_memory; + u32 configured_v6_session_table_buckets; + u32 configured_v6_session_table_memory; + u32 configured_v6_halfopen_table_buckets; + u32 configured_v6_halfopen_table_memory; + + /** Transport table (preallocation) size parameters */ + u32 local_endpoints_table_memory; + u32 local_endpoints_table_buckets; + + /** Preallocate session config parameter */ + u32 preallocated_sessions; #if SESSION_DBG /** @@ -213,6 +204,31 @@ struct _session_manager_main }; +typedef struct session_dgram_pre_hdr_ +{ + u32 data_length; + u32 data_offset; +} session_dgram_pre_hdr_t; + +/* *INDENT-OFF* */ +typedef CLIB_PACKED (struct session_dgram_header_ +{ + u32 data_length; + u32 data_offset; + ip46_address_t rmt_ip; + ip46_address_t lcl_ip; + u16 rmt_port; + u16 lcl_port; + u8 is_ip4; +}) session_dgram_hdr_t; +/* *INDENT-ON* */ + +#define SESSION_CONN_ID_LEN 37 +#define SESSION_CONN_HDR_LEN 45 + +STATIC_ASSERT (sizeof (session_dgram_hdr_t) == (SESSION_CONN_ID_LEN + 8), + "session conn id wrong length"); + extern session_manager_main_t session_manager_main; extern vlib_node_registration_t session_queue_node; @@ -225,52 +241,33 @@ vnet_get_session_manager_main () return &session_manager_main; } -/* - * Stream session functions - */ - -stream_session_t *stream_session_lookup_listener4 (ip4_address_t * lcl, - u16 lcl_port, u8 proto); -stream_session_t *stream_session_lookup4 (ip4_address_t * lcl, - ip4_address_t * rmt, u16 lcl_port, - u16 rmt_port, u8 proto, - u32 thread_index); -stream_session_t *stream_session_lookup_listener6 (ip6_address_t * lcl, - u16 lcl_port, u8 proto); -stream_session_t *stream_session_lookup6 (ip6_address_t * lcl, - ip6_address_t * rmt, u16 lcl_port, - u16 rmt_port, u8, u32 thread_index); -transport_connection_t - * stream_session_lookup_transport4 (ip4_address_t * lcl, - ip4_address_t * rmt, u16 lcl_port, - u16 rmt_port, u8 proto, - u32 thread_index); -transport_connection_t - * stream_session_lookup_transport6 (ip6_address_t * lcl, - ip6_address_t * rmt, u16 lcl_port, - u16 rmt_port, u8 proto, - u32 thread_index); -stream_session_t *stream_session_lookup_listener (ip46_address_t * lcl, - u16 lcl_port, u8 proto); -void stream_session_table_add_for_tc (transport_connection_t * tc, u64 value); -int stream_session_table_del_for_tc (transport_connection_t * tc); - -always_inline stream_session_t * -stream_session_get_tsi (u64 ti_and_si, u32 thread_index) +always_inline u8 +stream_session_is_valid (u32 si, u8 thread_index) { - ASSERT ((u32) (ti_and_si >> 32) == thread_index); - return pool_elt_at_index (session_manager_main.sessions[thread_index], - ti_and_si & 0xFFFFFFFFULL); + stream_session_t *s; + s = pool_elt_at_index (session_manager_main.sessions[thread_index], si); + if (s->thread_index != thread_index || s->session_index != si + /* || s->server_rx_fifo->master_session_index != si + || s->server_tx_fifo->master_session_index != si + || s->server_rx_fifo->master_thread_index != thread_index + || s->server_tx_fifo->master_thread_index != thread_index */ ) + return 0; + return 1; } +stream_session_t *session_alloc (u32 thread_index); +int session_alloc_fifos (segment_manager_t * sm, stream_session_t * s); +void session_free (stream_session_t * s); + always_inline stream_session_t * -stream_session_get (u32 si, u32 thread_index) +session_get (u32 si, u32 thread_index) { + ASSERT (stream_session_is_valid (si, thread_index)); return pool_elt_at_index (session_manager_main.sessions[thread_index], si); } always_inline stream_session_t * -stream_session_get_if_valid (u64 si, u32 thread_index) +session_get_if_valid (u64 si, u32 thread_index) { if (thread_index >= vec_len (session_manager_main.sessions)) return 0; @@ -278,82 +275,218 @@ stream_session_get_if_valid (u64 si, u32 thread_index) if (pool_is_free_index (session_manager_main.sessions[thread_index], si)) return 0; + ASSERT (stream_session_is_valid (si, thread_index)); return pool_elt_at_index (session_manager_main.sessions[thread_index], si); } -always_inline u64 -stream_session_handle (stream_session_t * s) +always_inline session_handle_t +session_handle (stream_session_t * s) { return ((u64) s->thread_index << 32) | (u64) s->session_index; } always_inline u32 -stream_session_index_from_handle (u64 handle) +session_index_from_handle (session_handle_t handle) { return handle & 0xFFFFFFFF; } always_inline u32 -stream_session_thread_from_handle (u64 handle) +session_thread_from_handle (session_handle_t handle) { return handle >> 32; } always_inline void -stream_session_parse_handle (u64 handle, u32 * index, u32 * thread_index) +session_parse_handle (session_handle_t handle, u32 * index, + u32 * thread_index) { - *index = stream_session_index_from_handle (handle); - *thread_index = stream_session_thread_from_handle (handle); + *index = session_index_from_handle (handle); + *thread_index = session_thread_from_handle (handle); } always_inline stream_session_t * -stream_session_get_from_handle (u64 handle) +session_get_from_handle (session_handle_t handle) { session_manager_main_t *smm = &session_manager_main; - return pool_elt_at_index (smm->sessions[stream_session_thread_from_handle - (handle)], - stream_session_index_from_handle (handle)); + u32 session_index, thread_index; + session_parse_handle (handle, &session_index, &thread_index); + return pool_elt_at_index (smm->sessions[thread_index], session_index); } always_inline stream_session_t * -stream_session_listener_get (u8 sst, u64 si) +session_get_from_handle_if_valid (session_handle_t handle) { - return pool_elt_at_index (session_manager_main.listen_sessions[sst], si); + u32 session_index, thread_index; + session_parse_handle (handle, &session_index, &thread_index); + return session_get_if_valid (session_index, thread_index); } -always_inline u32 -stream_session_get_index (stream_session_t * s) +always_inline u8 +session_handle_is_local (session_handle_t handle) +{ + if ((handle >> 32) == SESSION_LOCAL_HANDLE_PREFIX) + return 1; + return 0; +} + +always_inline transport_proto_t +session_type_transport_proto (session_type_t st) +{ + return (st >> 1); +} + +always_inline u8 +session_type_is_ip4 (session_type_t st) +{ + return (st & 1); +} + +always_inline transport_proto_t +session_get_transport_proto (stream_session_t * s) { - if (s->session_state == SESSION_STATE_LISTENING) - return s - session_manager_main.listen_sessions[s->session_type]; + return (s->session_type >> 1); +} + +always_inline fib_protocol_t +session_get_fib_proto (stream_session_t * s) +{ + u8 is_ip4 = s->session_type & 1; + return (is_ip4 ? FIB_PROTOCOL_IP4 : FIB_PROTOCOL_IP6); +} - return s - session_manager_main.sessions[s->thread_index]; +always_inline session_type_t +session_type_from_proto_and_ip (transport_proto_t proto, u8 is_ip4) +{ + return (proto << 1 | is_ip4); +} + +always_inline u8 +session_has_transport (stream_session_t * s) +{ + return (session_get_transport_proto (s) != TRANSPORT_PROTO_NONE); +} + +always_inline transport_service_type_t +session_transport_service_type (stream_session_t * s) +{ + transport_proto_t tp; + tp = session_get_transport_proto (s); + return transport_protocol_service_type (tp); +} + +/** + * Acquires a lock that blocks a session pool from expanding. + * + * This is typically used for safely peeking into other threads' + * pools in order to clone elements. Lock should be dropped as soon + * as possible by calling @ref session_pool_remove_peeker. + * + * NOTE: Avoid using pool_elt_at_index while the lock is held because + * it may lead to free elt bitmap expansion/contraction! + */ +always_inline void +session_pool_add_peeker (u32 thread_index) +{ + session_manager_main_t *smm = &session_manager_main; + if (thread_index == vlib_get_thread_index ()) + return; + clib_rwlock_reader_lock (&smm->peekers_rw_locks[thread_index]); +} + +always_inline void +session_pool_remove_peeker (u32 thread_index) +{ + session_manager_main_t *smm = &session_manager_main; + if (thread_index == vlib_get_thread_index ()) + return; + clib_rwlock_reader_unlock (&smm->peekers_rw_locks[thread_index]); +} + +/** + * Get session from handle and 'lock' pool resize if not in same thread + * + * Caller should drop the peek 'lock' as soon as possible. + */ +always_inline stream_session_t * +session_get_from_handle_safe (u64 handle) +{ + session_manager_main_t *smm = &session_manager_main; + u32 thread_index = session_thread_from_handle (handle); + if (thread_index == vlib_get_thread_index ()) + { + return pool_elt_at_index (smm->sessions[thread_index], + session_index_from_handle (handle)); + } + else + { + session_pool_add_peeker (thread_index); + /* Don't use pool_elt_at index. See @ref session_pool_add_peeker */ + return smm->sessions[thread_index] + session_index_from_handle (handle); + } } always_inline u32 stream_session_max_rx_enqueue (transport_connection_t * tc) { - stream_session_t *s = stream_session_get (tc->s_index, tc->thread_index); + stream_session_t *s = session_get (tc->s_index, tc->thread_index); return svm_fifo_max_enqueue (s->server_rx_fifo); } always_inline u32 -stream_session_fifo_size (transport_connection_t * tc) +stream_session_rx_fifo_size (transport_connection_t * tc) { - stream_session_t *s = stream_session_get (tc->s_index, tc->thread_index); + stream_session_t *s = session_get (tc->s_index, tc->thread_index); return s->server_rx_fifo->nitems; } +always_inline u32 +session_get_index (stream_session_t * s) +{ + return (s - session_manager_main.sessions[s->thread_index]); +} + +always_inline stream_session_t * +session_clone_safe (u32 session_index, u32 thread_index) +{ + stream_session_t *old_s, *new_s; + u32 current_thread_index = vlib_get_thread_index (); + + /* If during the memcpy pool is reallocated AND the memory allocator + * decides to give the old chunk of memory to somebody in a hurry to + * scribble something on it, we have a problem. So add this thread as + * a session pool peeker. + */ + session_pool_add_peeker (thread_index); + new_s = session_alloc (current_thread_index); + old_s = session_manager_main.sessions[thread_index] + session_index; + clib_memcpy (new_s, old_s, sizeof (*new_s)); + session_pool_remove_peeker (thread_index); + new_s->thread_index = current_thread_index; + new_s->session_index = session_get_index (new_s); + return new_s; +} + +transport_connection_t *session_get_transport (stream_session_t * s); + +u32 stream_session_tx_fifo_max_dequeue (transport_connection_t * tc); + int -stream_session_enqueue_data (transport_connection_t * tc, vlib_buffer_t * b, - u32 offset, u8 queue_event, u8 is_in_order); -u32 -stream_session_peek_bytes (transport_connection_t * tc, u8 * buffer, - u32 offset, u32 max_bytes); +session_enqueue_stream_connection (transport_connection_t * tc, + vlib_buffer_t * b, u32 offset, + u8 queue_event, u8 is_in_order); +int session_enqueue_dgram_connection (stream_session_t * s, + session_dgram_hdr_t * hdr, + vlib_buffer_t * b, u8 proto, + u8 queue_event); +int stream_session_peek_bytes (transport_connection_t * tc, u8 * buffer, + u32 offset, u32 max_bytes); u32 stream_session_dequeue_drop (transport_connection_t * tc, u32 max_bytes); -void stream_session_connect_notify (transport_connection_t * tc, u8 sst, - u8 is_fail); +int session_stream_connect_notify (transport_connection_t * tc, u8 is_fail); +int session_dgram_connect_notify (transport_connection_t * tc, + u32 old_thread_index, + stream_session_t ** new_session); void stream_session_init_fifos_pointers (transport_connection_t * tc, u32 rx_pointer, u32 tx_pointer); @@ -361,92 +494,101 @@ void stream_session_accept_notify (transport_connection_t * tc); void stream_session_disconnect_notify (transport_connection_t * tc); void stream_session_delete_notify (transport_connection_t * tc); void stream_session_reset_notify (transport_connection_t * tc); -int -stream_session_accept (transport_connection_t * tc, u32 listener_index, - u8 sst, u8 notify); -int -stream_session_open (u32 app_index, session_type_t st, - transport_endpoint_t * tep, - transport_connection_t ** tc); -int stream_session_listen (stream_session_t * s, transport_endpoint_t * tep); +int stream_session_accept (transport_connection_t * tc, u32 listener_index, + u8 notify); +int session_open (u32 app_index, session_endpoint_t * tep, u32 opaque); +int stream_session_listen (stream_session_t * s, session_endpoint_t * tep); int stream_session_stop_listen (stream_session_t * s); void stream_session_disconnect (stream_session_t * s); +void stream_session_disconnect_transport (stream_session_t * s); void stream_session_cleanup (stream_session_t * s); void session_send_session_evt_to_thread (u64 session_handle, fifo_event_type_t evt_type, u32 thread_index); +ssvm_private_t *session_manager_get_evt_q_segment (void); + u8 *format_stream_session (u8 * s, va_list * args); +uword unformat_stream_session (unformat_input_t * input, va_list * args); +uword unformat_transport_connection (unformat_input_t * input, + va_list * args); -void session_register_transport (u8 type, const transport_proto_vft_t * vft); -transport_proto_vft_t *session_get_transport_vft (u8 type); +void session_register_transport (transport_proto_t transport_proto, + const transport_proto_vft_t * vft, u8 is_ip4, + u32 output_node); clib_error_t *vnet_session_enable_disable (vlib_main_t * vm, u8 is_en); -always_inline unix_shared_memory_queue_t * +always_inline svm_queue_t * session_manager_get_vpp_event_queue (u32 thread_index) { return session_manager_main.vpp_event_queues[thread_index]; } -int session_manager_flush_enqueue_events (u32 thread_index); +int session_manager_flush_enqueue_events (u8 proto, u32 thread_index); +int session_manager_flush_all_enqueue_events (u8 transport_proto); always_inline u64 listen_session_get_handle (stream_session_t * s) { ASSERT (s->session_state == SESSION_STATE_LISTENING); - return ((u64) s->session_type << 32) | s->session_index; + return session_handle (s); } always_inline stream_session_t * -listen_session_get_from_handle (u64 handle) +listen_session_get_from_handle (session_handle_t handle) { - session_manager_main_t *smm = &session_manager_main; - stream_session_t *s; - u32 type, index; - type = handle >> 32; - index = handle & 0xFFFFFFFF; - - if (pool_is_free_index (smm->listen_sessions[type], index)) - return 0; + return session_get_from_handle (handle); +} - s = pool_elt_at_index (smm->listen_sessions[type], index); - ASSERT (s->session_state == SESSION_STATE_LISTENING); - return s; +always_inline void +listen_session_parse_handle (session_handle_t handle, u32 * index, + u32 * thread_index) +{ + session_parse_handle (handle, index, thread_index); } always_inline stream_session_t * -listen_session_new (session_type_t type) +listen_session_new (u8 thread_index, session_type_t type) { stream_session_t *s; - pool_get (session_manager_main.listen_sessions[type], s); - memset (s, 0, sizeof (*s)); - + s = session_alloc (thread_index); s->session_type = type; s->session_state = SESSION_STATE_LISTENING; - s->session_index = s - session_manager_main.listen_sessions[type]; - return s; } always_inline stream_session_t * -listen_session_get (session_type_t type, u32 index) +listen_session_get (u32 index) { - return pool_elt_at_index (session_manager_main.listen_sessions[type], - index); + return session_get (index, 0); } always_inline void listen_session_del (stream_session_t * s) { - pool_put (session_manager_main.listen_sessions[s->session_type], s); + session_free (s); } +transport_connection_t *listen_session_get_transport (stream_session_t * s); + +int +listen_session_get_local_session_endpoint (stream_session_t * listener, + session_endpoint_t * sep); + always_inline u8 session_manager_is_enabled () { return session_manager_main.is_enabled == 1; } +#define session_cli_return_if_not_enabled() \ +do { \ + if (!session_manager_main.is_enabled) \ + return clib_error_return(0, "session layer is not enabled"); \ +} while (0) + +void session_node_enable_disable (u8 is_en); + #endif /* __included_session_h__ */ /*