/* * 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 <vnet/vnet.h> #include <vlibmemory/api.h> #include <vnet/session/application.h> #include <vnet/session/application_interface.h> #include <vnet/session/session.h> #define ECHO_SERVER_DBG (0) #define DBG(_fmt, _args...) \ if (ECHO_SERVER_DBG) \ clib_warning (_fmt, ##_args) typedef struct { /* * Server app parameters */ svm_msg_q_t **vpp_queue; svm_queue_t *vl_input_queue; /**< Sever's event queue */ u32 app_index; /**< Server app index */ u32 my_client_index; /**< API client handle */ u32 node_index; /**< process node index for event scheduling */ /* * Config params */ u8 no_echo; /**< Don't echo traffic */ u32 fifo_size; /**< Fifo size */ u32 rcv_buffer_size; /**< Rcv buffer size */ u32 prealloc_fifos; /**< Preallocate fifos */ u32 private_segment_count; /**< Number of private segments */ u32 private_segment_size; /**< Size of private segments */ char *server_uri; /**< Server URI */ u32 tls_engine; /**< TLS engine: mbedtls/openssl */ u8 is_dgram; /**< set if transport is dgram */ /* * Test state */ u8 **rx_buf; /**< Per-thread RX buffer */ u64 byte_index; u32 **rx_retries; u8 transport_proto; u64 listener_handle; /**< Session handle of the root listener */ vlib_main_t *vlib_main; } echo_server_main_t; echo_server_main_t echo_server_main; int quic_echo_server_qsession_accept_callback (session_t * s) { DBG ("QSession %u accept w/opaque %d", s->session_index, s->opaque); return 0; } int quic_echo_server_session_accept_callback (session_t * s) { echo_server_main_t *esm = &echo_server_main; if (s->listener_handle == esm->listener_handle) return quic_echo_server_qsession_accept_callback (s); DBG ("SSESSION %u accept w/opaque %d", s->session_index, s->opaque); esm->vpp_queue[s->thread_index] = session_main_get_vpp_event_queue (s->thread_index); s->session_state = SESSION_STATE_READY; esm->byte_index = 0; ASSERT (vec_len (esm->rx_retries) > s->thread_index); vec_validate (esm->rx_retries[s->thread_index], s->session_index); esm->rx_retries[s->thread_index][s->session_index] = 0; return 0; } int echo_server_session_accept_callback (session_t * s) { echo_server_main_t *esm = &echo_server_main; esm->vpp_queue[s->thread_index] = session_main_get_vpp_event_queue (s->thread_index); s->session_state = SESSION_STATE_READY; esm->byte_index = 0; ASSERT (vec_len (esm->rx_retries) > s->thread_index); vec_validate (esm->rx_retries[s->thread_index], s->session_index); esm->rx_retries[s->thread_index][s->session_index] = 0; return 0; } void echo_server_session_disconnect_callback (session_t * s) { echo_server_main_t *esm = &echo_server_main; vnet_disconnect_args_t _a = { 0 }, *a = &_a; a->handle = session_handle (s); a->app_index = esm->app_index; vnet_disconnect_session (a); } void echo_server_session_reset_callback (session_t * s) { echo_server_main_t *esm = &echo_server_main; vnet_disconnect_args_t _a = { 0 }, *a = &_a; clib_warning ("Reset session %U", format_session, s, 2); a->handle = session_handle (s); a->app_index = esm->app_index; vnet_disconnect_session (a); } int echo_server_session_connected_callback (u32 app_index, u32 api_context, session_t * s, session_error_t err) { clib_warning ("called..."); return -1; } int echo_server_add_segment_callback (u32 client_index, u64 segment_handle) { /* New heaps may be added */ return 0; } int echo_server_redirect_connect_callback (u32 client_index, void *mp) { clib_warning ("called..."); return -1; } void test_bytes (echo_server_main_t * esm, int actual_transfer) { int i; u32 my_thread_id = vlib_get_thread_index (); for (i = 0; i < actual_transfer; i++) { if (esm->rx_buf[my_thread_id][i] != ((esm->byte_index + i) & 0xff)) { clib_warning ("at %lld expected %d got %d", esm->byte_index + i, (esm->byte_index + i) & 0xff, esm->rx_buf[my_thread_id][i]); } } esm->byte_index += actual_transfer; } /* * If no-echo, just drop the data and be done with it. */ int echo_server_builtin_server_rx_callback_no_echo (session_t * s) { svm_fifo_t *rx_fifo = s->rx_fifo; svm_fifo_dequeue_drop (rx_fifo, svm_fifo_max_dequeue_cons (rx_fifo)); return 0; } int echo_server_rx_callback (session_t * s) { u32 n_written, max_dequeue, max_enqueue, max_transfer; int actual_transfer; svm_fifo_t *tx_fifo, *rx_fifo; echo_server_main_t *esm = &echo_server_main; u32 thread_index = vlib_get_thread_index (); app_session_transport_t at; ASSERT (s->thread_index == thread_index); 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_enqueue = svm_fifo_max_enqueue_prod (tx_fifo); if (!esm->is_dgram) { max_dequeue = svm_fifo_max_dequeue_cons (rx_fifo); } else { session_dgram_pre_hdr_t ph; svm_fifo_peek (rx_fifo, 0, sizeof (ph), (u8 *) & ph); max_dequeue = ph.data_length - ph.data_offset; if (!esm->vpp_queue[s->thread_index]) { svm_msg_q_t *mq; mq = session_main_get_vpp_event_queue (s->thread_index); esm->vpp_queue[s->thread_index] = mq; } max_enqueue -= sizeof (session_dgram_hdr_t); } if (PREDICT_FALSE (max_dequeue == 0)) return 0; /* Number of bytes we're going to copy */ max_transfer = clib_min (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)) { if (session_send_io_evt_to_thread (rx_fifo, SESSION_IO_EVT_BUILTIN_RX)) clib_warning ("failed to enqueue self-tap"); vec_validate (esm->rx_retries[s->thread_index], s->session_index); if (esm->rx_retries[thread_index][s->session_index] == 500000) { clib_warning ("session stuck: %U", format_session, s, 2); } if (esm->rx_retries[thread_index][s->session_index] < 500001) esm->rx_retries[thread_index][s->session_index]++; } return 0; } vec_validate (esm->rx_buf[thread_index], max_transfer); if (!esm->is_dgram) { actual_transfer = app_recv_stream_raw (rx_fifo, esm->rx_buf[thread_index], max_transfer, 0 /* don't clear event */ , 0 /* peek */ ); } else { actual_transfer = app_recv_dgram_raw (rx_fifo, esm->rx_buf[thread_index], max_transfer, &at, 0 /* don't clear event */ , 0 /* peek */ ); } ASSERT (actual_transfer == max_transfer); /* test_bytes (esm, actual_transfer); */ /* * Echo back */ if (!esm->is_dgram) { n_written = app_send_stream_raw (tx_fifo, esm->vpp_queue[thread_index], esm->rx_buf[thread_index], actual_transfer, SESSION_IO_EVT_TX, 1 /* do_evt */ , 0); } else { n_written = app_send_dgram_raw (tx_fifo, &at, esm->vpp_queue[s->thread_index], esm->rx_buf[thread_index], actual_transfer, SESSION_IO_EVT_TX, 1 /* do_evt */ , 0); } if (n_written != max_transfer) clib_warning ("short trout! written %u read %u", n_written, max_transfer); if (PREDICT_FALSE (svm_fifo_max_dequeue_cons (rx_fifo))) goto rx_event; return 0; } static session_cb_vft_t echo_server_session_cb_vft = { .session_accept_callback = echo_server_session_accept_callback, .session_disconnect_callback = echo_server_session_disconnect_callback, .session_connected_callback = echo_server_session_connected_callback, .add_segment_callback = echo_server_add_segment_callback, .builtin_app_rx_callback = echo_server_rx_callback, .session_reset_callback = echo_server_session_reset_callback }; /* Abuse VPP's input queue */ static int create_api_loopback (vlib_main_t * vm) { echo_server_main_t *esm = &echo_server_main; api_main_t *am = vlibapi_get_main (); vl_shmem_hdr_t *shmem_hdr; shmem_hdr = am->shmem_hdr; esm->vl_input_queue = shmem_hdr->vl_input_queue; esm->my_client_index = vl_api_memclnt_create_internal ("echo_server", esm->vl_input_queue); return 0; } static int echo_server_attach (u8 * appns_id, u64 appns_flags, u64 appns_secret) { vnet_app_add_tls_cert_args_t _a_cert, *a_cert = &_a_cert; vnet_app_add_tls_key_args_t _a_key, *a_key = &_a_key; echo_server_main_t *esm = &echo_server_main; vnet_app_attach_args_t _a, *a = &_a; u64 options[APP_OPTIONS_N_OPTIONS]; u32 segment_size = 512 << 20; clib_memset (a, 0, sizeof (*a)); clib_memset (options, 0, sizeof (options)); if (esm->no_echo) echo_server_session_cb_vft.builtin_app_rx_callback = echo_server_builtin_server_rx_callback_no_echo; else echo_server_session_cb_vft.builtin_app_rx_callback = echo_server_rx_callback; if (esm->transport_proto == TRANSPORT_PROTO_QUIC) echo_server_session_cb_vft.session_accept_callback = quic_echo_server_session_accept_callback; if (esm->private_segment_size) segment_size = esm->private_segment_size; a->api_client_index = esm->my_client_index; a->session_cb_vft = &echo_server_session_cb_vft; a->options = options; a->options[APP_OPTIONS_SEGMENT_SIZE] = segment_size; a->options[APP_OPTIONS_ADD_SEGMENT_SIZE] = segment_size; a->options[APP_OPTIONS_RX_FIFO_SIZE] = esm->fifo_size; a->options[APP_OPTIONS_TX_FIFO_SIZE] = esm->fifo_size; a->options[APP_OPTIONS_PRIVATE_SEGMENT_COUNT] = esm->private_segment_count; a->options[APP_OPTIONS_TLS_ENGINE] = esm->tls_engine; a->options[APP_OPTIONS_PCT_FIRST_ALLOC] = 100; a->options[APP_OPTIONS_PREALLOC_FIFO_PAIRS] = esm->prealloc_fifos ? esm->prealloc_fifos : 1; a->options[APP_OPTIONS_FLAGS] = APP_OPTIONS_FLAGS_IS_BUILTIN; if (appns_id) { a->namespace_id = appns_id; a->options[APP_OPTIONS_FLAGS] |= appns_flags; a->options[APP_OPTIONS_NAMESPACE_SECRET] = appns_secret; } if (vnet_application_attach (a)) { clib_warning ("failed to attach server"); return -1; } esm->app_index = a->app_index; clib_memset (a_cert, 0, sizeof (*a_cert)); a_cert->app_index = a->app_index; vec_validate (a_cert->cert, test_srv_crt_rsa_len); clib_memcpy_fast (a_cert->cert, test_srv_crt_rsa, test_srv_crt_rsa_len); vnet_app_add_tls_cert (a_cert); clib_memset (a_key, 0, sizeof (*a_key)); a_key->app_index = a->app_index; vec_validate (a_key->key, test_srv_key_rsa_len); clib_memcpy_fast (a_key->key, test_srv_key_rsa, test_srv_key_rsa_len); vnet_app_add_tls_key (a_key); return 0; } static int echo_server_detach (void) { echo_server_main_t *esm = &echo_server_main; vnet_app_detach_args_t _da, *da = &_da; int rv; da->app_index = esm->app_index; rv = vnet_application_detach (da); esm->app_index = ~0; return rv; } static int echo_server_listen () { int rv; echo_server_main_t *esm = &echo_server_main; vnet_listen_args_t _a, *a = &_a; clib_memset (a, 0, sizeof (*a)); a->app_index = esm->app_index; a->uri = esm->server_uri; rv = vnet_bind_uri (a); esm->listener_handle = a->handle; return rv; } static int echo_server_create (vlib_main_t * vm, u8 * appns_id, u64 appns_flags, u64 appns_secret) { echo_server_main_t *esm = &echo_server_main; vlib_thread_main_t *vtm = vlib_get_thread_main (); u32 num_threads; int i; if (esm->my_client_index == (u32) ~ 0) { if (create_api_loopback (vm)) { clib_warning ("failed to create api loopback"); return -1; } } num_threads = 1 /* main thread */ + vtm->n_threads; vec_validate (echo_server_main.vpp_queue, num_threads - 1); vec_validate (esm->rx_buf, num_threads - 1); vec_validate (esm->rx_retries, num_threads - 1); for (i = 0; i < vec_len (esm->rx_retries); i++) vec_validate (esm->rx_retries[i], pool_elts (session_main.wrk[i].sessions)); esm->rcv_buffer_size = clib_max (esm->rcv_buffer_size, esm->fifo_size); for (i = 0; i < num_threads; i++) vec_validate (esm->rx_buf[i], esm->rcv_buffer_size); if (echo_server_attach (appns_id, appns_flags, appns_secret)) { clib_warning ("failed to attach server"); return -1; } if (echo_server_listen ()) { clib_warning ("failed to start listening"); if (echo_server_detach ()) clib_warning ("failed to detach"); return -1; } return 0; } static clib_error_t * echo_server_create_command_fn (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { echo_server_main_t *esm = &echo_server_main; u8 server_uri_set = 0, *appns_id = 0; u64 tmp, appns_flags = 0, appns_secret = 0; char *default_uri = "tcp://0.0.0.0/1234"; int rv, is_stop = 0; session_endpoint_cfg_t sep = SESSION_ENDPOINT_CFG_NULL; esm->no_echo = 0; esm->fifo_size = 64 << 10; esm->rcv_buffer_size = 128 << 10; esm->prealloc_fifos = 0; esm->private_segment_count = 0; esm->private_segment_size = 0; esm->tls_engine = CRYPTO_ENGINE_OPENSSL; vec_free (esm->server_uri); while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) { if (unformat (input, "uri %s", &esm->server_uri)) server_uri_set = 1; else if (unformat (input, "no-echo")) esm->no_echo = 1; else if (unformat (input, "fifo-size %d", &esm->fifo_size)) esm->fifo_size <<= 10; else if (unformat (input, "rcv-buf-size %d", &esm->rcv_buffer_size)) ; else if (unformat (input, "prealloc-fifos %d", &esm->prealloc_fifos)) ; else if (unformat (input, "private-segment-count %d", &esm->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); esm->private_segment_size = tmp; } else if (unformat (input, "appns %_%v%_", &appns_id)) ; else if (unformat (input, "all-scope")) appns_flags |= (APP_OPTIONS_FLAGS_USE_GLOBAL_SCOPE | APP_OPTIONS_FLAGS_USE_LOCAL_SCOPE); else if (unformat (input, "local-scope")) appns_flags |= APP_OPTIONS_FLAGS_USE_LOCAL_SCOPE; else if (unformat (input, "global-scope")) appns_flags |= APP_OPTIONS_FLAGS_USE_GLOBAL_SCOPE; else if (unformat (input, "secret %lu", &appns_secret)) ; else if (unformat (input, "stop")) is_stop = 1; else if (unformat (input, "tls-engine %d", &esm->tls_engine)) ; else return clib_error_return (0, "failed: unknown input `%U'", format_unformat_error, input); } if (is_stop) { if (esm->app_index == (u32) ~ 0) { clib_warning ("server not running"); return clib_error_return (0, "failed: server not running"); } rv = echo_server_detach (); if (rv) { clib_warning ("failed: detach"); return clib_error_return (0, "failed: server detach %d", rv); } return 0; } vnet_session_enable_disable (vm, 1 /* turn on TCP, etc. */ ); if (!server_uri_set) { clib_warning ("No uri provided! Using default: %s", default_uri); esm->server_uri = (char *) format (0, "%s%c", default_uri, 0); } if ((rv = parse_uri ((char *) esm->server_uri, &sep))) return clib_error_return (0, "Uri parse error: %d", rv); esm->transport_proto = sep.transport_proto; esm->is_dgram = (sep.transport_proto == TRANSPORT_PROTO_UDP); rv = echo_server_create (vm, appns_id, appns_flags, appns_secret); vec_free (appns_id); if (rv) { vec_free (esm->server_uri); return clib_error_return (0, "failed: server_create returned %d", rv); } return 0; } /* *INDENT-OFF* */ VLIB_CLI_COMMAND (echo_server_create_command, static) = { .path = "test echo server", .short_help = "test echo server proto <proto> [no echo][fifo-size <mbytes>]" "[rcv-buf-size <bytes>][prealloc-fifos <count>]" "[private-segment-count <count>][private-segment-size <bytes[m|g]>]" "[uri <tcp://ip/port>]", .function = echo_server_create_command_fn, }; /* *INDENT-ON* */ clib_error_t * echo_server_main_init (vlib_main_t * vm) { echo_server_main_t *esm = &echo_server_main; esm->my_client_index = ~0; return 0; } VLIB_INIT_FUNCTION (echo_server_main_init); /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */