/* * Copyright (c) 2015-2017 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 <vnet/vnet.h> #include <vlibmemory/api.h> #include <vnet/session/application.h> #include <vnet/session/application_interface.h> #include <vnet/tcp/builtin_proxy.h> builtin_proxy_main_t builtin_proxy_main; static void delete_proxy_session (stream_session_t * s, int is_active_open) { builtin_proxy_main_t *bpm = &builtin_proxy_main; proxy_session_t *ps = 0; vnet_disconnect_args_t _a, *a = &_a; stream_session_t *active_open_session = 0; stream_session_t *server_session = 0; uword *p; u64 handle; handle = stream_session_handle (s); clib_spinlock_lock_if_init (&bpm->sessions_lock); if (is_active_open) { active_open_session = s; p = hash_get (bpm->proxy_session_by_active_open_handle, handle); if (p == 0) { clib_warning ("proxy session for %s handle %lld (%llx) AWOL", is_active_open ? "active open" : "server", handle, handle); } else { ps = pool_elt_at_index (bpm->sessions, p[0]); if (ps->vpp_server_handle != ~0) server_session = stream_session_get_from_handle (ps->vpp_server_handle); else server_session = 0; } } else { server_session = s; p = hash_get (bpm->proxy_session_by_server_handle, handle); if (p == 0) { clib_warning ("proxy session for %s handle %lld (%llx) AWOL", is_active_open ? "active open" : "server", handle, handle); } else { ps = pool_elt_at_index (bpm->sessions, p[0]); if (ps->vpp_server_handle != ~0) active_open_session = stream_session_get_from_handle (ps->vpp_server_handle); else active_open_session = 0; } } if (ps) { if (CLIB_DEBUG > 0) memset (ps, 0xFE, sizeof (*ps)); pool_put (bpm->sessions, ps); } clib_spinlock_unlock_if_init (&bpm->sessions_lock); if (active_open_session) { a->handle = stream_session_handle (active_open_session); a->app_index = bpm->active_open_app_index; hash_unset (bpm->proxy_session_by_active_open_handle, stream_session_handle (active_open_session)); vnet_disconnect_session (a); } if (server_session) { a->handle = stream_session_handle (server_session); a->app_index = bpm->server_app_index; hash_unset (bpm->proxy_session_by_server_handle, stream_session_handle (server_session)); vnet_disconnect_session (a); } } static int server_accept_callback (stream_session_t * s) { builtin_proxy_main_t *bpm = &builtin_proxy_main; s->session_state = SESSION_STATE_READY; clib_spinlock_lock_if_init (&bpm->sessions_lock); return 0; } static void server_disconnect_callback (stream_session_t * s) { delete_proxy_session (s, 0 /* is_active_open */ ); } static void server_reset_callback (stream_session_t * s) { clib_warning ("Reset session %U", format_stream_session, s, 2); delete_proxy_session (s, 0 /* is_active_open */ ); } static int server_connected_callback (u32 app_index, u32 api_context, stream_session_t * s, u8 is_fail) { clib_warning ("called..."); return -1; } static int server_add_segment_callback (u32 client_index, const u8 * seg_name, u32 seg_size) { clib_warning ("called..."); return -1; } static int server_redirect_connect_callback (u32 client_index, void *mp) { clib_warning ("called..."); return -1; } static int server_rx_callback (stream_session_t * s) { u32 max_dequeue; int actual_transfer __attribute__ ((unused)); svm_fifo_t *tx_fifo, *rx_fifo; builtin_proxy_main_t *bpm = &builtin_proxy_main; u32 thread_index = vlib_get_thread_index (); vnet_connect_args_t _a, *a = &_a; proxy_session_t *ps; int proxy_index; uword *p; svm_fifo_t *active_open_tx_fifo; session_fifo_event_t evt; ASSERT (s->thread_index == thread_index); clib_spinlock_lock_if_init (&bpm->sessions_lock); p = hash_get (bpm->proxy_session_by_server_handle, stream_session_handle (s)); if (PREDICT_TRUE (p != 0)) { clib_spinlock_unlock_if_init (&bpm->sessions_lock); active_open_tx_fifo = s->server_rx_fifo; /* * Send event for active open tx fifo */ if (svm_fifo_set_event (active_open_tx_fifo)) { evt.fifo = active_open_tx_fifo; evt.event_type = FIFO_EVENT_APP_TX; if (unix_shared_memory_queue_add (bpm->active_open_event_queue[thread_index], (u8 *) & evt, 0 /* do wait for mutex */ )) clib_warning ("failed to enqueue tx evt"); } } else { rx_fifo = s->server_rx_fifo; tx_fifo = s->server_tx_fifo; ASSERT (rx_fifo->master_thread_index == thread_index); ASSERT (tx_fifo->master_thread_index == thread_index); max_dequeue = svm_fifo_max_dequeue (s->server_rx_fifo); if (PREDICT_FALSE (max_dequeue == 0)) return 0; actual_transfer = svm_fifo_peek (rx_fifo, 0 /* relative_offset */ , max_dequeue, bpm->rx_buf[thread_index]); /* $$$ your message in this space: parse url, etc. */ memset (a, 0, sizeof (*a)); clib_spinlock_lock_if_init (&bpm->sessions_lock); pool_get (bpm->sessions, ps); memset (ps, 0, sizeof (*ps)); ps->server_rx_fifo = rx_fifo; ps->server_tx_fifo = tx_fifo; ps->vpp_server_handle = stream_session_handle (s); proxy_index = ps - bpm->sessions; hash_set (bpm->proxy_session_by_server_handle, ps->vpp_server_handle, proxy_index); clib_spinlock_unlock_if_init (&bpm->sessions_lock); a->uri = "tcp://6.0.2.2/23"; a->api_context = proxy_index; a->app_index = bpm->active_open_app_index; a->mp = 0; vnet_connect_uri (a); } return 0; } static session_cb_vft_t builtin_session_cb_vft = { .session_accept_callback = server_accept_callback, .session_disconnect_callback = server_disconnect_callback, .session_connected_callback = server_connected_callback, .add_segment_callback = server_add_segment_callback, .redirect_connect_callback = server_redirect_connect_callback, .builtin_server_rx_callback = server_rx_callback, .session_reset_callback = server_reset_callback }; static int active_open_connected_callback (u32 app_index, u32 opaque, stream_session_t * s, u8 is_fail) { builtin_proxy_main_t *bpm = &builtin_proxy_main; proxy_session_t *ps; u8 thread_index = vlib_get_thread_index (); session_fifo_event_t evt; if (is_fail) { clib_warning ("connection %d failed!", opaque); return 0; } /* * Setup proxy session handle. */ clib_spinlock_lock_if_init (&bpm->sessions_lock); ps = pool_elt_at_index (bpm->sessions, opaque); ps->vpp_active_open_handle = stream_session_handle (s); s->server_tx_fifo = ps->server_rx_fifo; s->server_rx_fifo = ps->server_tx_fifo; /* * Reset the active-open tx-fifo master indices so the active-open session * will receive data, etc. */ s->server_tx_fifo->master_session_index = s->session_index; s->server_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->server_tx_fifo->refcnt++; s->server_rx_fifo->refcnt++; hash_set (bpm->proxy_session_by_active_open_handle, ps->vpp_active_open_handle, opaque); clib_spinlock_unlock_if_init (&bpm->sessions_lock); /* * Send event for active open tx fifo */ if (svm_fifo_set_event (s->server_tx_fifo)) { evt.fifo = s->server_tx_fifo; evt.event_type = FIFO_EVENT_APP_TX; if (unix_shared_memory_queue_add (bpm->active_open_event_queue[thread_index], (u8 *) & evt, 0 /* do wait for mutex */ )) clib_warning ("failed to enqueue tx evt"); } return 0; } static void active_open_reset_callback (stream_session_t * s) { delete_proxy_session (s, 1 /* is_active_open */ ); } static int active_open_create_callback (stream_session_t * s) { return 0; } static void active_open_disconnect_callback (stream_session_t * s) { delete_proxy_session (s, 1 /* is_active_open */ ); } static int active_open_rx_callback (stream_session_t * s) { builtin_proxy_main_t *bpm = &builtin_proxy_main; session_fifo_event_t evt; svm_fifo_t *server_rx_fifo; u32 thread_index = vlib_get_thread_index (); server_rx_fifo = s->server_rx_fifo; /* * Send event for server tx fifo */ if (svm_fifo_set_event (server_rx_fifo)) { evt.fifo = server_rx_fifo; evt.event_type = FIFO_EVENT_APP_TX; if (unix_shared_memory_queue_add (bpm->server_event_queue[thread_index], (u8 *) & evt, 0 /* do wait for mutex */ )) clib_warning ("failed to enqueue server rx evt"); } return 0; } /* *INDENT-OFF* */ static session_cb_vft_t builtin_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, .builtin_server_rx_callback = active_open_rx_callback }; /* *INDENT-ON* */ static void create_api_loopbacks (vlib_main_t * vm) { builtin_proxy_main_t *bpm = &builtin_proxy_main; api_main_t *am = &api_main; vl_shmem_hdr_t *shmem_hdr; shmem_hdr = am->shmem_hdr; bpm->vl_input_queue = shmem_hdr->vl_input_queue; bpm->server_client_index = vl_api_memclnt_create_internal ("proxy_server", bpm->vl_input_queue); bpm->active_open_client_index = vl_api_memclnt_create_internal ("proxy_active_open", bpm->vl_input_queue); } static int server_attach () { builtin_proxy_main_t *bpm = &builtin_proxy_main; u8 segment_name[128]; u64 options[SESSION_OPTIONS_N_OPTIONS]; vnet_app_attach_args_t _a, *a = &_a; memset (a, 0, sizeof (*a)); memset (options, 0, sizeof (options)); a->api_client_index = bpm->server_client_index; a->session_cb_vft = &builtin_session_cb_vft; a->options = options; a->options[SESSION_OPTIONS_SEGMENT_SIZE] = 512 << 20; a->options[SESSION_OPTIONS_RX_FIFO_SIZE] = bpm->fifo_size; a->options[SESSION_OPTIONS_TX_FIFO_SIZE] = bpm->fifo_size; a->options[APP_OPTIONS_PRIVATE_SEGMENT_COUNT] = bpm->private_segment_count; a->options[APP_OPTIONS_PRIVATE_SEGMENT_SIZE] = bpm->private_segment_size; a->options[APP_OPTIONS_PREALLOC_FIFO_PAIRS] = bpm->prealloc_fifos ? bpm->prealloc_fifos : 1; a->options[APP_OPTIONS_FLAGS] = APP_OPTIONS_FLAGS_BUILTIN_APP; a->segment_name = segment_name; a->segment_name_length = ARRAY_LEN (segment_name); if (vnet_application_attach (a)) { clib_warning ("failed to attach server"); return -1; } bpm->server_app_index = a->app_index; return 0; } static int active_open_attach (void) { builtin_proxy_main_t *bpm = &builtin_proxy_main; vnet_app_attach_args_t _a, *a = &_a; u8 segment_name[128]; u32 segment_name_length; u64 options[16]; segment_name_length = ARRAY_LEN (segment_name); memset (a, 0, sizeof (*a)); memset (options, 0, sizeof (options)); a->api_client_index = bpm->active_open_client_index; a->segment_name = segment_name; a->segment_name_length = segment_name_length; a->session_cb_vft = &builtin_clients; options[SESSION_OPTIONS_ACCEPT_COOKIE] = 0x12345678; options[SESSION_OPTIONS_SEGMENT_SIZE] = 512 << 20; options[SESSION_OPTIONS_RX_FIFO_SIZE] = bpm->fifo_size; options[SESSION_OPTIONS_TX_FIFO_SIZE] = bpm->fifo_size; options[APP_OPTIONS_PRIVATE_SEGMENT_COUNT] = bpm->private_segment_count; options[APP_OPTIONS_PRIVATE_SEGMENT_SIZE] = bpm->private_segment_size; options[APP_OPTIONS_PREALLOC_FIFO_PAIRS] = bpm->prealloc_fifos ? bpm->prealloc_fifos : 1; options[APP_OPTIONS_FLAGS] = APP_OPTIONS_FLAGS_BUILTIN_APP | APP_OPTIONS_FLAGS_IS_PROXY; a->options = options; if (vnet_application_attach (a)) return -1; bpm->active_open_app_index = a->app_index; return 0; } static int server_listen () { builtin_proxy_main_t *bpm = &builtin_proxy_main; vnet_bind_args_t _a, *a = &_a; memset (a, 0, sizeof (*a)); a->app_index = bpm->server_app_index; a->uri = "tcp://0.0.0.0/23"; return vnet_bind_uri (a); } static int server_create (vlib_main_t * vm) { builtin_proxy_main_t *bpm = &builtin_proxy_main; vlib_thread_main_t *vtm = vlib_get_thread_main (); u32 num_threads; int i; if (bpm->server_client_index == (u32) ~ 0) create_api_loopbacks (vm); num_threads = 1 /* main thread */ + vtm->n_threads; vec_validate (builtin_proxy_main.server_event_queue, num_threads - 1); vec_validate (builtin_proxy_main.active_open_event_queue, num_threads - 1); vec_validate (bpm->rx_buf, num_threads - 1); for (i = 0; i < num_threads; i++) vec_validate (bpm->rx_buf[i], bpm->rcv_buffer_size); if (server_attach ()) { clib_warning ("failed to attach server app"); return -1; } if (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++) { bpm->active_open_event_queue[i] = session_manager_get_vpp_event_queue (i); ASSERT (bpm->active_open_event_queue[i]); bpm->server_event_queue[i] = session_manager_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) { builtin_proxy_main_t *bpm = &builtin_proxy_main; int rv; u64 tmp; bpm->fifo_size = 64 << 10; bpm->rcv_buffer_size = 1024; bpm->prealloc_fifos = 0; bpm->private_segment_count = 0; bpm->private_segment_size = 0; while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) { if (unformat (input, "fifo-size %d", &bpm->fifo_size)) bpm->fifo_size <<= 10; else if (unformat (input, "rcv-buf-size %d", &bpm->rcv_buffer_size)) ; else if (unformat (input, "prealloc-fifos %d", &bpm->prealloc_fifos)) ; else if (unformat (input, "private-segment-count %d", &bpm->private_segment_count)) ; else if (unformat (input, "private-segment-size %U", unformat_memory_size, &tmp)) { if (tmp >= 0x100000000ULL) return clib_error_return (0, "private segment size %lld (%llu) too large", tmp, tmp); bpm->private_segment_size = tmp; } else return clib_error_return (0, "unknown input `%U'", format_unformat_error, input); } vnet_session_enable_disable (vm, 1 /* turn on TCP, etc. */ ); rv = 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 (server_create_command, static) = { .path = "test proxy server", .short_help = "test proxy server", .function = proxy_server_create_command_fn, }; /* *INDENT-ON* */ clib_error_t * builtin_tcp_proxy_main_init (vlib_main_t * vm) { builtin_proxy_main_t *bpm = &builtin_proxy_main; bpm->server_client_index = ~0; bpm->active_open_client_index = ~0; bpm->proxy_session_by_active_open_handle = hash_create (0, sizeof (uword)); bpm->proxy_session_by_server_handle = hash_create (0, sizeof (uword)); return 0; } VLIB_INIT_FUNCTION (builtin_tcp_proxy_main_init); /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */