/* * 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 #include #include #include /* define message IDs */ #include /* define message structures */ #define vl_typedefs #include #undef vl_typedefs /* define generated endian-swappers */ #define vl_endianfun #include #undef vl_endianfun /* instantiate all the print functions we know about */ #define vl_print(handle, ...) vlib_cli_output (handle, __VA_ARGS__) #define vl_printfun #include #undef vl_printfun typedef struct { u8 *rx_buf; unix_shared_memory_queue_t **vpp_queue; u64 byte_index; /* Sever's event queue */ unix_shared_memory_queue_t *vl_input_queue; /* API client handle */ u32 my_client_index; u32 app_index; /* process node index for evnt scheduling */ u32 node_index; vlib_main_t *vlib_main; } builtin_server_main_t; builtin_server_main_t builtin_server_main; int builtin_session_accept_callback (stream_session_t * s) { builtin_server_main_t *bsm = &builtin_server_main; bsm->vpp_queue[s->thread_index] = session_manager_get_vpp_event_queue (s->thread_index); s->session_state = SESSION_STATE_READY; bsm->byte_index = 0; return 0; } void builtin_session_disconnect_callback (stream_session_t * s) { builtin_server_main_t *bsm = &builtin_server_main; vnet_disconnect_args_t _a, *a = &_a; a->handle = stream_session_handle (s); a->app_index = bsm->app_index; vnet_disconnect_session (a); } void builtin_session_reset_callback (stream_session_t * s) { clib_warning ("called.. "); stream_session_cleanup (s); } int builtin_session_connected_callback (u32 app_index, u32 api_context, stream_session_t * s, u8 is_fail) { clib_warning ("called..."); return -1; } int builtin_add_segment_callback (u32 client_index, const u8 * seg_name, u32 seg_size) { clib_warning ("called..."); return -1; } int builtin_redirect_connect_callback (u32 client_index, void *mp) { clib_warning ("called..."); return -1; } void test_bytes (builtin_server_main_t * bsm, int actual_transfer) { int i; for (i = 0; i < actual_transfer; i++) { if (bsm->rx_buf[i] != ((bsm->byte_index + i) & 0xff)) { clib_warning ("at %lld expected %d got %d", bsm->byte_index + i, (bsm->byte_index + i) & 0xff, bsm->rx_buf[i]); } } bsm->byte_index += actual_transfer; } int builtin_server_rx_callback (stream_session_t * s) { u32 n_written, max_dequeue, max_enqueue, max_transfer; int actual_transfer; svm_fifo_t *tx_fifo, *rx_fifo; builtin_server_main_t *bsm = &builtin_server_main; session_fifo_event_t evt; static int serial_number = 0; tx_fifo = s->server_tx_fifo; rx_fifo = s->server_rx_fifo; max_dequeue = svm_fifo_max_dequeue (s->server_rx_fifo); max_enqueue = svm_fifo_max_enqueue (s->server_tx_fifo); if (PREDICT_FALSE (max_dequeue == 0)) return 0; /* Number of bytes we're going to copy */ max_transfer = (max_dequeue < max_enqueue) ? max_dequeue : max_enqueue; /* No space in tx fifo */ if (PREDICT_FALSE (max_transfer == 0)) { /* XXX timeout for session that are stuck */ rx_event: /* Program self-tap to retry */ if (svm_fifo_set_event (rx_fifo)) { evt.fifo = rx_fifo; evt.event_type = FIFO_EVENT_BUILTIN_RX; evt.event_id = 0; unix_shared_memory_queue_add (bsm->vpp_queue[s->thread_index], (u8 *) & evt, 0 /* do wait for mutex */ ); } return 0; } vec_validate (bsm->rx_buf, max_transfer - 1); _vec_len (bsm->rx_buf) = max_transfer; actual_transfer = svm_fifo_dequeue_nowait (rx_fifo, max_transfer, bsm->rx_buf); ASSERT (actual_transfer == max_transfer); // test_bytes (bsm, actual_transfer); /* * Echo back */ n_written = svm_fifo_enqueue_nowait (tx_fifo, actual_transfer, bsm->rx_buf); if (n_written != max_transfer) clib_warning ("short trout!"); if (svm_fifo_set_event (tx_fifo)) { /* Fabricate TX event, send to vpp */ evt.fifo = tx_fifo; evt.event_type = FIFO_EVENT_APP_TX; evt.event_id = serial_number++; unix_shared_memory_queue_add (bsm->vpp_queue[s->thread_index], (u8 *) & evt, 0 /* do wait for mutex */ ); } if (PREDICT_FALSE (max_enqueue < max_dequeue)) goto rx_event; return 0; } static session_cb_vft_t builtin_session_cb_vft = { .session_accept_callback = builtin_session_accept_callback, .session_disconnect_callback = builtin_session_disconnect_callback, .session_connected_callback = builtin_session_connected_callback, .add_segment_callback = builtin_add_segment_callback, .redirect_connect_callback = builtin_redirect_connect_callback, .builtin_server_rx_callback = builtin_server_rx_callback, .session_reset_callback = builtin_session_reset_callback }; /* Abuse VPP's input queue */ static int create_api_loopback (vlib_main_t * vm) { builtin_server_main_t *bsm = &builtin_server_main; vl_api_memclnt_create_t _m, *mp = &_m; extern void vl_api_memclnt_create_t_handler (vl_api_memclnt_create_t *); api_main_t *am = &api_main; vl_shmem_hdr_t *shmem_hdr; uword *event_data = 0, event_type; int resolved = 0; /* * Create a "loopback" API client connection * Don't do things like this unless you know what you're doing... */ shmem_hdr = am->shmem_hdr; bsm->vl_input_queue = shmem_hdr->vl_input_queue; memset (mp, 0, sizeof (*mp)); mp->_vl_msg_id = VL_API_MEMCLNT_CREATE; mp->context = 0xFEEDFACE; mp->input_queue = pointer_to_uword (bsm->vl_input_queue); strncpy ((char *) mp->name, "tcp_test_server", sizeof (mp->name) - 1); vl_api_memclnt_create_t_handler (mp); /* Wait for reply */ bsm->node_index = vlib_get_current_process (vm)->node_runtime.node_index; vlib_process_wait_for_event_or_clock (vm, 1.0); event_type = vlib_process_get_events (vm, &event_data); switch (event_type) { case 1: resolved = 1; break; case ~0: /* timed out */ break; default: clib_warning ("unknown event_type %d", event_type); } if (!resolved) return -1; return 0; } static int server_attach () { builtin_server_main_t *bsm = &builtin_server_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 = bsm->my_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] = 64 << 10; a->options[SESSION_OPTIONS_TX_FIFO_SIZE] = 64 << 10; a->options[APP_OPTIONS_FLAGS] = APP_OPTIONS_FLAGS_BUILTIN_APP; a->options[APP_OPTIONS_PREALLOC_FIFO_PAIRS] = 8192; 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; } bsm->app_index = a->app_index; return 0; } static int server_listen () { builtin_server_main_t *bsm = &builtin_server_main; vnet_bind_args_t _a, *a = &_a; memset (a, 0, sizeof (*a)); a->app_index = bsm->app_index; a->uri = "tcp://0.0.0.0/1234"; return vnet_bind_uri (a); } static int server_create (vlib_main_t * vm) { builtin_server_main_t *bsm = &builtin_server_main; u32 num_threads; vlib_thread_main_t *vtm = vlib_get_thread_main (); if (bsm->my_client_index == (u32) ~ 0) { if (create_api_loopback (vm)) return -1; } num_threads = 1 /* main thread */ + vtm->n_threads; vec_validate (builtin_server_main.vpp_queue, num_threads - 1); if (server_attach ()) { clib_warning ("failed to attach server"); return -1; } if (server_listen ()) { clib_warning ("failed to start listening"); return -1; } return 0; } /* Get our api client index */ static void vl_api_memclnt_create_reply_t_handler (vl_api_memclnt_create_reply_t * mp) { vlib_main_t *vm = vlib_get_main (); builtin_server_main_t *bsm = &builtin_server_main; bsm->my_client_index = mp->index; vlib_process_signal_event (vm, bsm->node_index, 1 /* evt */ , 0 /* data */ ); } #define foreach_tcp_builtin_server_api_msg \ _(MEMCLNT_CREATE_REPLY, memclnt_create_reply) \ static clib_error_t * tcp_builtin_server_api_hookup (vlib_main_t * vm) { vl_msg_api_msg_config_t _c, *c = &_c; /* Hook up client-side static APIs to our handlers */ #define _(N,n) do { \ c->id = VL_API_##N; \ c->name = #n; \ c->handler = vl_api_##n##_t_handler; \ c->cleanup = vl_noop_handler; \ c->endian = vl_api_##n##_t_endian; \ c->print = vl_api_##n##_t_print; \ c->size = sizeof(vl_api_##n##_t); \ c->traced = 1; /* trace, so these msgs print */ \ c->replay = 0; /* don't replay client create/delete msgs */ \ c->message_bounce = 0; /* don't bounce this message */ \ vl_msg_api_config(c);} while (0); foreach_tcp_builtin_server_api_msg; #undef _ return 0; } static clib_error_t * server_create_command_fn (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { int rv; #if 0 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) { if (unformat (input, "whatever %d", &whatever)) ; else return clib_error_return (0, "unknown input `%U'", format_unformat_error, input); } #endif tcp_builtin_server_api_hookup (vm); 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 tcp server", .short_help = "test tcp server", .function = server_create_command_fn, }; /* *INDENT-ON* */ clib_error_t * builtin_tcp_server_main_init (vlib_main_t * vm) { builtin_server_main_t *bsm = &builtin_server_main; bsm->my_client_index = ~0; return 0; } VLIB_INIT_FUNCTION (builtin_tcp_server_main_init); /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */