/* * Copyright (c) 2017-2019 Cisco and/or its affiliates. * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at: * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include #include #include #include #include #include proxy_main_t proxy_main; #define TCP_MSS 1460 typedef struct { char uri[128]; u32 app_index; u32 api_context; } proxy_connect_args_t; static void proxy_cb_fn (void *data, u32 data_len) { proxy_connect_args_t *pa = (proxy_connect_args_t *) data; vnet_connect_args_t a; memset (&a, 0, sizeof (a)); a.api_context = pa->api_context; a.app_index = pa->app_index; a.uri = pa->uri; vnet_connect_uri (&a); } static void proxy_call_main_thread (vnet_connect_args_t * a) { if (vlib_get_thread_index () == 0) { vnet_connect_uri (a); } else { proxy_connect_args_t args; args.api_context = a->api_context; args.app_index = a->app_index; clib_memcpy (args.uri, a->uri, vec_len (a->uri)); vl_api_rpc_call_main_thread (proxy_cb_fn, (u8 *) & args, sizeof (args)); } } static proxy_session_t * proxy_get_active_open (proxy_main_t * pm, session_handle_t handle) { proxy_session_t *ps = 0; uword *p; p = hash_get (pm->proxy_session_by_active_open_handle, handle); if (p) ps = pool_elt_at_index (pm->sessions, p[0]); return ps; } static proxy_session_t * proxy_get_passive_open (proxy_main_t * pm, session_handle_t handle) { proxy_session_t *ps = 0; uword *p; p = hash_get (pm->proxy_session_by_server_handle, handle); if (p) ps = pool_elt_at_index (pm->sessions, p[0]); return ps; } static void proxy_try_close_session (session_t * s, int is_active_open) { proxy_main_t *pm = &proxy_main; proxy_session_t *ps = 0; vnet_disconnect_args_t _a, *a = &_a; session_handle_t handle; handle = session_handle (s); clib_spinlock_lock_if_init (&pm->sessions_lock); if (is_active_open) { ps = proxy_get_active_open (pm, handle); ASSERT (ps != 0); a->handle = ps->vpp_active_open_handle; a->app_index = pm->active_open_app_index; vnet_disconnect_session (a); ps->ao_disconnected = 1; if (!ps->po_disconnected) { ASSERT (ps->vpp_server_handle != SESSION_INVALID_HANDLE); a->handle = ps->vpp_server_handle; a->app_index = pm->server_app_index; vnet_disconnect_session (a); ps->po_disconnected = 1; } } else { ps = proxy_get_passive_open (pm, handle); ASSERT (ps != 0); a->handle = ps->vpp_server_handle; a->app_index = pm->server_app_index; vnet_disconnect_session (a); ps->po_disconnected = 1; if (!ps->ao_disconnected && !ps->active_open_establishing) { /* Proxy session closed before active open */ if (ps->vpp_active_open_handle != SESSION_INVALID_HANDLE) { a->handle = ps->vpp_active_open_handle; a->app_index = pm->active_open_app_index; vnet_disconnect_session (a); } ps->ao_disconnected = 1; } } clib_spinlock_unlock_if_init (&pm->sessions_lock); } static void proxy_session_free (proxy_session_t * ps) { proxy_main_t *pm = &proxy_main; if (CLIB_DEBUG > 0) clib_memset (ps, 0xFE, sizeof (*ps)); pool_put (pm->sessions, ps); } static void proxy_try_delete_session (session_t * s, u8 is_active_open) { proxy_main_t *pm = &proxy_main; proxy_session_t *ps = 0; session_handle_t handle; handle = session_handle (s); clib_spinlock_lock_if_init (&pm->sessions_lock); if (is_active_open) { ps = proxy_get_active_open (pm, handle); ASSERT (ps != 0); ps->vpp_active_open_handle = SESSION_INVALID_HANDLE; hash_unset (pm->proxy_session_by_active_open_handle, handle); if (ps->vpp_server_handle == SESSION_INVALID_HANDLE) proxy_session_free (ps); } else { ps = proxy_get_passive_open (pm, handle); ASSERT (ps != 0); ps->vpp_server_handle = SESSION_INVALID_HANDLE; hash_unset (pm->proxy_session_by_server_handle, handle); if (ps->vpp_active_open_handle == SESSION_INVALID_HANDLE) { if (!ps->active_open_establishing) proxy_session_free (ps); } } clib_spinlock_unlock_if_init (&pm->sessions_lock); } static int common_fifo_tuning_callback (session_t * s, svm_fifo_t * f, session_ft_action_t act, u32 bytes) { proxy_main_t *pm = &proxy_main; segment_manager_t *sm = segment_manager_get (f->segment_manager); fifo_segment_t *fs = segment_manager_get_segment (sm, f->segment_index); u8 seg_usage = fifo_segment_get_mem_usage (fs); u32 fifo_in_use = svm_fifo_max_dequeue_prod (f); u32 fifo_size = svm_fifo_size (f); u8 fifo_usage = fifo_in_use * 100 / fifo_size; u8 update_size = 0; ASSERT (act < SESSION_FT_ACTION_N_ACTIONS); if (act == SESSION_FT_ACTION_ENQUEUED) { if (seg_usage < pm->low_watermark && fifo_usage > 50) update_size = fifo_in_use; else if (seg_usage < pm->high_watermark && fifo_usage > 80) update_size = fifo_in_use; update_size = clib_min (update_size, sm->max_fifo_size - fifo_size); if (update_size) svm_fifo_set_size (f, fifo_size + update_size); } else /* dequeued */ { if (seg_usage > pm->high_watermark || fifo_usage < 20) update_size = bytes; else if (seg_usage > pm->low_watermark && fifo_usage < 50) update_size = (bytes / 2); ASSERT (fifo_size >= 4096); update_size = clib_min (update_size, fifo_size - 4096); if (update_size) svm_fifo_set_size (f, fifo_size - update_size); } return 0; } static int proxy_accept_callback (session_t * s) { proxy_main_t *pm = &proxy_main; proxy_session_t *ps; clib_spinlock_lock_if_init (&pm->sessions_lock); pool_get_zero (pm->sessions, ps); ps->vpp_server_handle = session_handle (s); ps->vpp_active_open_handle = SESSION_INVALID_HANDLE; hash_set (pm->proxy_session_by_server_handle, ps->vpp_server_handle, ps - pm->sessions); clib_spinlock_unlock_if_init (&pm->sessions_lock); s->session_state = SESSION_STATE_READY; return 0; } static void proxy_disconnect_callback (session_t * s) { proxy_try_close_session (s, 0 /* is_active_open */ ); } static void proxy_reset_callback (session_t * s) { proxy_try_close_session (s, 0 /* is_active_open */ ); } static int proxy_connected_callback (u32 app_index, u32 api_context, session_t * s, session_error_t err) { clib_warning ("called..."); return -1; } static int proxy_add_segment_callback (u32 client_index, u64 segment_handle) { clib_warning ("called..."); return -1; } static int proxy_rx_callback (session_t * s) { proxy_main_t *pm = &proxy_main; u32 thread_index = vlib_get_thread_index (); svm_fifo_t *ao_tx_fifo; proxy_session_t *ps; ASSERT (s->thread_index == thread_index); clib_spinlock_lock_if_init (&pm->sessions_lock); ps = proxy_get_passive_open (pm, session_handle (s)); ASSERT (ps != 0); if (PREDICT_TRUE (ps->vpp_active_open_handle != SESSION_INVALID_HANDLE)) { clib_spinlock_unlock_if_init (&pm->sessions_lock); ao_tx_fifo = s->rx_fifo; /* * Send event for active open tx fifo */ if (svm_fifo_set_event (ao_tx_fifo)) { u32 ao_thread_index = ao_tx_fifo->master_thread_index; u32 ao_session_index = ao_tx_fifo->master_session_index; if (session_send_io_evt_to_thread_custom (&ao_session_index, ao_thread_index, SESSION_IO_EVT_TX)) clib_warning ("failed to enqueue tx evt"); } if (svm_fifo_max_enqueue (ao_tx_fifo) <= TCP_MSS) svm_fifo_add_want_deq_ntf (ao_tx_fifo, SVM_FIFO_WANT_DEQ_NOTIF); } else { vnet_connect_args_t _a, *a = &_a; svm_fifo_t *tx_fifo, *rx_fifo; u32 max_dequeue, proxy_index; int actual_transfer __attribute__ ((unused)); rx_fifo = s->rx_fifo; tx_fifo = s->tx_fifo; ASSERT (rx_fifo->master_thread_index == thread_index); ASSERT (tx_fifo->master_thread_index == thread_index); max_dequeue = svm_fifo_max_dequeue_cons (s->rx_fifo); if (PREDICT_FALSE (max_dequeue == 0)) return 0; max_dequeue = clib_min (pm->rcv_buffer_size, max_dequeue); actual_transfer = svm_fifo_peek (rx_fifo, 0 /* relative_offset */ , max_dequeue, pm->rx_buf[thread_index]); /* $$$ your message in this space: parse url, etc. */ clib_memset (a, 0, sizeof (*a)); ps->server_rx_fifo = rx_fifo; ps->server_tx_fifo = tx_fifo; ps->active_open_establishing = 1; proxy_index = ps - pm->sessions; clib_spinlock_unlock_if_init (&pm->sessions_lock); a->uri = (char *) pm->client_uri; a->api_context = proxy_index; a->app_index = pm->active_open_app_index; proxy_call_main_thread (a); } return 0; } static void proxy_force_ack (void *handlep) { transport_connection_t *tc; session_t *ao_s; ao_s = session_get_from_handle (pointer_to_uword (handlep)); tc = session_get_transport (ao_s); tcp_send_ack ((tcp_connection_t *) tc); } static int proxy_tx_callback (session_t * proxy_s) { proxy_main_t *pm = &proxy_main; proxy_session_t *ps; u32 min_free; min_free = clib_min (svm_fifo_size (proxy_s->tx_fifo) >> 3, 128 << 10); if (svm_fifo_max_enqueue (proxy_s->tx_fifo) < min_free) { svm_fifo_add_want_deq_ntf (proxy_s->tx_fifo, SVM_FIFO_WANT_DEQ_NOTIF); return 0; } clib_spinlock_lock_if_init (&pm->sessions_lock); ps = proxy_get_passive_open (pm, session_handle (proxy_s)); ASSERT (ps != 0); if (ps->vpp_active_open_handle == SESSION_INVALID_HANDLE) return 0; /* Force ack on active open side to update rcv wnd. Make sure it's done on * the right thread */ void *arg = uword_to_pointer (ps->vpp_active_open_handle, void *); session_send_rpc_evt_to_thread (ps->server_rx_fifo->master_thread_index, proxy_force_ack, arg); clib_spinlock_unlock_if_init (&pm->sessions_lock); return 0; } static void proxy_cleanup_callback (session_t * s, session_cleanup_ntf_t ntf) { if (ntf == SESSION_CLEANUP_TRANSPORT) return; proxy_try_delete_session (s, 0 /* is_active_open */ ); } static session_cb_vft_t proxy_session_cb_vft = { .session_accept_callback = proxy_accept_callback, .session_disconnect_callback = proxy_disconnect_callback, .session_connected_callback = proxy_connected_callback, .add_segment_callback = proxy_add_segment_callback, .builtin_app_rx_callback = proxy_rx_callback, .builtin_app_tx_callback = proxy_tx_callback, .session_reset_callback = proxy_reset_callback, .session_cleanup_callback = proxy_cleanup_callback, .fifo_tuning_callback = common_fifo_tuning_callback }; static int active_open_connected_callback (u32 app_index, u32 opaque, session_t * s, session_error_t err) { proxy_main_t *pm = &proxy_main; proxy_session_t *ps; u8 thread_index = vlib_get_thread_index (); if (err) { clib_warning ("connection %d failed!", opaque); ASSERT (0); return 0; } /* * Setup proxy session handle. */ clib_spinlock_lock_if_init (&pm->sessions_lock); ps = pool_elt_at_index (pm->sessions, opaque); ps->vpp_active_open_handle = session_handle (s); ps->active_open_establishing = 0; /* Passive open session was already closed! */ if (ps->po_disconnected) { /* Setup everything for the cleanup notification */ hash_set (pm->proxy_session_by_active_open_handle, ps->vpp_active_open_handle, opaque); ps->ao_disconnected = 1; clib_spinlock_unlock_if_init (&pm->sessions_lock); return -1; } s->tx_fifo = ps->server_rx_fifo; s->rx_fifo = ps->server_tx_fifo; /* * Reset the active-open tx-fifo master indices so the active-open session * will receive data, etc. */ s->tx_fifo->master_session_index = s->session_index; s->tx_fifo->master_thread_index = s->thread_index; /* * Account for the active-open session's use of the fifos * so they won't disappear until the last session which uses * them disappears */ s->tx_fifo->refcnt++; s->rx_fifo->refcnt++; svm_fifo_init_ooo_lookup (s->tx_fifo, 1 /* deq ooo */ ); svm_fifo_init_ooo_lookup (s->rx_fifo, 0 /* enq ooo */ ); hash_set (pm->proxy_session_by_active_open_handle, ps->vpp_active_open_handle, opaque); clib_spinlock_unlock_if_init (&pm->sessions_lock); /* * Send event for active open tx fifo */ ASSERT (s->thread_index == thread_index); if (svm_fifo_set_event (s->tx_fifo)) session_send_io_evt_to_thread (s->tx_fifo, SESSION_IO_EVT_TX); return 0; } static void active_open_reset_callback (session_t * s) { proxy_try_close_session (s, 1 /* is_active_open */ ); } static int active_open_create_callback (session_t * s) { return 0; } static void active_open_disconnect_callback (session_t * s) { proxy_try_close_session (s, 1 /* is_active_open */ ); } static int active_open_rx_callback (session_t * s) { svm_fifo_t *proxy_tx_fifo; proxy_tx_fifo = s->rx_fifo; /* * Send event for server tx fifo */ if (svm_fifo_set_event (proxy_tx_fifo)) { u8 thread_index = proxy_tx_fifo->master_thread_index; u32 session_index = proxy_tx_fifo->master_session_index; return session_send_io_evt_to_thread_custom (&session_index, thread_index, SESSION_IO_EVT_TX); } if (svm_fifo_max_enqueue (proxy_tx_fifo) <= TCP_MSS) svm_fifo_add_want_deq_ntf (proxy_tx_fifo, SVM_FIFO_WANT_DEQ_NOTIF); return 0; } static int active_open_tx_callback (session_t * ao_s) { proxy_main_t *pm = &proxy_main; transport_connection_t *tc; session_handle_t handle; proxy_session_t *ps; session_t *proxy_s; u32 min_free; uword *p; min_free = clib_min (svm_fifo_size (ao_s->tx_fifo) >> 3, 128 << 10); if (svm_fifo_max_enqueue (ao_s->tx_fifo) < min_free) { svm_fifo_add_want_deq_ntf (ao_s->tx_fifo, SVM_FIFO_WANT_DEQ_NOTIF); return 0; } clib_spinlock_lock_if_init (&pm->sessions_lock); handle = session_handle (ao_s); p = hash_get (pm->proxy_session_by_active_open_handle, handle); if (!p) return 0; if (pool_is_free_index (pm->sessions, p[0])) return 0; ps = pool_elt_at_index (pm->sessions, p[0]); if (ps->vpp_server_handle == ~0) return 0; proxy_s = session_get_from_handle (ps->vpp_server_handle); /* Force ack on proxy side to update rcv wnd */ tc = session_get_transport (proxy_s); tcp_send_ack ((tcp_connection_t *) tc); clib_spinlock_unlock_if_init (&pm->sessions_lock); return 0; } static void active_open_cleanup_callback (session_t * s, session_cleanup_ntf_t ntf) { if (ntf == SESSION_CLEANUP_TRANSPORT) return; proxy_try_delete_session (s, 1 /* is_active_open */ ); } /* *INDENT-OFF* */ static session_cb_vft_t active_open_clients = { .session_reset_callback = active_open_reset_callback, .session_connected_callback = active_open_connected_callback, .session_accept_callback = active_open_create_callback, .session_disconnect_callback = active_open_disconnect_callback, .session_cleanup_callback = active_open_cleanup_callback, .builtin_app_rx_callback = active_open_rx_callback, .builtin_app_tx_callback = active_open_tx_callback, .fifo_tuning_callback = common_fifo_tuning_callback }; /* *INDENT-ON* */ static int proxy_server_attach () { proxy_main_t *pm = &proxy_main; u64 options[APP_OPTIONS_N_OPTIONS]; vnet_app_attach_args_t _a, *a = &_a; u32 segment_size = 512 << 20; clib_memset (a, 0, sizeof (*a)); clib_memset (options, 0, sizeof (options)); if (pm->private_segment_size) segment_size = pm->private_segment_size; a->name = format (0, "proxy-server"); a->api_client_index = pm->server_client_index; a->session_cb_vft = &proxy_session_cb_vft; a->options = options; a->options[APP_OPTIONS_SEGMENT_SIZE] = segment_size; a->options[APP_OPTIONS_RX_FIFO_SIZE] = pm->fifo_size; a->options[APP_OPTIONS_TX_FIFO_SIZE] = pm->fifo_size; a->options[APP_OPTIONS_MAX_FIFO_SIZE] = pm->max_fifo_size; a->options[APP_OPTIONS_HIGH_WATERMARK] = (u64) pm->high_watermark; a->options[APP_OPTIONS_LOW_WATERMARK] = (u64) pm->low_watermark; a->options[APP_OPTIONS_PRIVATE_SEGMENT_COUNT] = pm->private_segment_count; a->options[APP_OPTIONS_PREALLOC_FIFO_PAIRS] = pm->prealloc_fifos ? pm->prealloc_fifos : 0; a->options[APP_OPTIONS_FLAGS] = APP_OPTIONS_FLAGS_IS_BUILTIN; if (vnet_application_attach (a)) { clib_warning ("failed to attach server"); return -1; } pm->server_app_index = a->app_index; vec_free (a->name); return 0; } static int active_open_attach (void) { proxy_main_t *pm = &proxy_main; vnet_app_attach_args_t _a, *a = &_a; u64 options[APP_OPTIONS_N_OPTIONS]; clib_memset (a, 0, sizeof (*a)); clib_memset (options, 0, sizeof (options)); a->api_client_index = pm->active_open_client_index; a->session_cb_vft = &active_open_clients; a->name = format (0, "proxy-active-open"); options[APP_OPTIONS_ACCEPT_COOKIE] = 0x12345678; options[APP_OPTIONS_SEGMENT_SIZE] = 512 << 20; options[APP_OPTIONS_RX_FIFO_SIZE] = pm->fifo_size; options[APP_OPTIONS_TX_FIFO_SIZE] = pm->fifo_size; options[APP_OPTIONS_MAX_FIFO_SIZE] = pm->max_fifo_size; options[APP_OPTIONS_HIGH_WATERMARK] = (u64) pm->high_watermark; options[APP_OPTIONS_LOW_WATERMARK] = (u64) pm->low_watermark; options[APP_OPTIONS_PRIVATE_SEGMENT_COUNT] = pm->private_segment_count; options[APP_OPTIONS_PREALLOC_FIFO_PAIRS] = pm->prealloc_fifos ? pm->prealloc_fifos : 0; options[APP_OPTIONS_FLAGS] = APP_OPTIONS_FLAGS_IS_BUILTIN | APP_OPTIONS_FLAGS_IS_PROXY; a->options = options; if (vnet_application_attach (a)) return -1; pm->active_open_app_index = a->app_index; vec_free (a->name); return 0; } static int proxy_server_listen () { proxy_main_t *pm = &proxy_main; vnet_listen_args_t _a, *a = &_a; clib_memset (a, 0, sizeof (*a)); a->app_index = pm->server_app_index; a->uri = (char *) pm->server_uri; return vnet_bind_uri (a); } static int proxy_server_create (vlib_main_t * vm) { proxy_main_t *pm = &proxy_main; vlib_thread_main_t *vtm = vlib_get_thread_main (); u32 num_threads; int i; num_threads = 1 /* main thread */ + vtm->n_threads; vec_validate (proxy_main.server_event_queue, num_threads - 1); vec_validate (proxy_main.active_open_event_queue, num_threads - 1); vec_validate (pm->rx_buf, num_threads - 1); for (i = 0; i < num_threads; i++) vec_validate (pm->rx_buf[i], pm->rcv_buffer_size); if (proxy_server_attach ()) { clib_warning ("failed to attach server app"); return -1; } if (proxy_server_listen ()) { clib_warning ("failed to start listening"); return -1; } if (active_open_attach ()) { clib_warning ("failed to attach active open app"); return -1; } for (i = 0; i < num_threads; i++) { pm->active_open_event_queue[i] = session_main_get_vpp_event_queue (i); ASSERT (pm->active_open_event_queue[i]); pm->server_event_queue[i] = session_main_get_vpp_event_queue (i); } return 0; } static clib_error_t * proxy_server_create_command_fn (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { proxy_main_t *pm = &proxy_main; char *default_server_uri = "tcp://0.0.0.0/23"; char *default_client_uri = "tcp://6.0.2.2/23"; int rv, tmp32; u64 tmp64; pm->fifo_size = 64 << 10; pm->max_fifo_size = 128 << 20; pm->high_watermark = 80; pm->low_watermark = 50; pm->rcv_buffer_size = 1024; pm->prealloc_fifos = 0; pm->private_segment_count = 0; pm->private_segment_size = 0; pm->server_uri = 0; pm->client_uri = 0; if (vlib_num_workers ()) clib_spinlock_init (&pm->sessions_lock); while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) { if (unformat (input, "fifo-size %U", unformat_memory_size, &pm->fifo_size)) ; else if (unformat (input, "max-fifo-size %U", unformat_memory_size, &pm->max_fifo_size)) ; else if (unformat (input, "high-watermark %d", &tmp32)) pm->high_watermark = (u8) tmp32; else if (unformat (input, "low-watermark %d", &tmp32)) pm->low_watermark = (u8) tmp32; else if (unformat (input, "rcv-buf-size %d", &pm->rcv_buffer_size)) ; else if (unformat (input, "prealloc-fifos %d", &pm->prealloc_fifos)) ; else if (unformat (input, "private-segment-count %d", &pm->private_segment_count)) ; else if (unformat (input, "private-segment-size %U", unformat_memory_size, &tmp64)) { if (tmp64 >= 0x100000000ULL) return clib_error_return (0, "private segment size %lld (%llu) too large", tmp64, tmp64); pm->private_segment_size = tmp64; } else if (unformat (input, "server-uri %s", &pm->server_uri)) vec_add1 (pm->server_uri, 0); else if (unformat (input, "client-uri %s", &pm->client_uri)) vec_add1 (pm->client_uri, 0); else return clib_error_return (0, "unknown input `%U'", format_unformat_error, input); } if (!pm->server_uri) { clib_warning ("No server-uri provided, Using default: %s", default_server_uri); pm->server_uri = format (0, "%s%c", default_server_uri, 0); } if (!pm->client_uri) { clib_warning ("No client-uri provided, Using default: %s", default_client_uri); pm->client_uri = format (0, "%s%c", default_client_uri, 0); } vnet_session_enable_disable (vm, 1 /* turn on session and transport */ ); rv = proxy_server_create (vm); switch (rv) { case 0: break; default: return clib_error_return (0, "server_create returned %d", rv); } return 0; } /* *INDENT-OFF* */ VLIB_CLI_COMMAND (proxy_create_command, static) = { .path = "test proxy server", .short_help = "test proxy server [server-uri ]" "[client-uri ][fifo-size [k|m]]" "[max-fifo-size [k|m]][high-watermark ]" "[low-watermark ][rcv-buf-size ][prealloc-fifos ]" "[private-segment-size ][private-segment-count ]", .function = proxy_server_create_command_fn, }; /* *INDENT-ON* */ clib_error_t * proxy_main_init (vlib_main_t * vm) { proxy_main_t *pm = &proxy_main; pm->server_client_index = ~0; pm->active_open_client_index = ~0; pm->proxy_session_by_active_open_handle = hash_create (0, sizeof (uword)); pm->proxy_session_by_server_handle = hash_create (0, sizeof (uword)); return 0; } VLIB_INIT_FUNCTION (proxy_main_init); /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */