From 191a59401c0552e5ea79041f34456eb9fcc1f311 Mon Sep 17 00:00:00 2001 From: Marco Varlese Date: Mon, 30 Oct 2017 18:17:21 +0100 Subject: SCTP stack (RFC4960) == CONTENT == * SCTP chunks definition as per RFC4960; * Helper functions to set/get values to/from the corresponding chunks; * Hooks to the session/application layers; * Complete state-machine handling; * Implementation for unexpected chunk received in a certain state (state-machine error handling) * Support for 1-single connection; * Sample application to test receive/transmit data-path; * Test to validate SCTP stack; Change-Id: I1b55c455ab400be9513f4e094dadfc3181d2ebc9 Signed-off-by: Marco Varlese --- src/vnet/sctp/builtin_client.c | 834 +++++++++++++++ src/vnet/sctp/builtin_client.h | 121 +++ src/vnet/sctp/builtin_server.c | 472 +++++++++ src/vnet/sctp/sctp.c | 848 ++++++++++++++++ src/vnet/sctp/sctp.h | 645 ++++++++++++ src/vnet/sctp/sctp_debug.h | 62 ++ src/vnet/sctp/sctp_error.def | 50 + src/vnet/sctp/sctp_format.c | 40 + src/vnet/sctp/sctp_input.c | 2202 ++++++++++++++++++++++++++++++++++++++++ src/vnet/sctp/sctp_output.c | 1331 ++++++++++++++++++++++++ src/vnet/sctp/sctp_packet.h | 1445 ++++++++++++++++++++++++++ src/vnet/sctp/sctp_pg.c | 30 + src/vnet/sctp/sctp_timer.h | 29 + 13 files changed, 8109 insertions(+) create mode 100644 src/vnet/sctp/builtin_client.c create mode 100644 src/vnet/sctp/builtin_client.h create mode 100644 src/vnet/sctp/builtin_server.c create mode 100644 src/vnet/sctp/sctp.c create mode 100644 src/vnet/sctp/sctp.h create mode 100644 src/vnet/sctp/sctp_debug.h create mode 100644 src/vnet/sctp/sctp_error.def create mode 100644 src/vnet/sctp/sctp_format.c create mode 100644 src/vnet/sctp/sctp_input.c create mode 100644 src/vnet/sctp/sctp_output.c create mode 100644 src/vnet/sctp/sctp_packet.h create mode 100644 src/vnet/sctp/sctp_pg.c create mode 100644 src/vnet/sctp/sctp_timer.h (limited to 'src/vnet/sctp') diff --git a/src/vnet/sctp/builtin_client.c b/src/vnet/sctp/builtin_client.c new file mode 100644 index 00000000000..4e50c0ae2ea --- /dev/null +++ b/src/vnet/sctp/builtin_client.c @@ -0,0 +1,834 @@ +/* + * Copyright (c) 2018 SUSE LLC. + * 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 + +tclient_main_t tclient_main; + +#define SCTP_BUILTIN_CLIENT_DBG (0) + +static void +signal_evt_to_cli_i (int *code) +{ + tclient_main_t *tm = &tclient_main; + ASSERT (vlib_get_thread_index () == 0); + vlib_process_signal_event (tm->vlib_main, tm->cli_node_index, *code, 0); +} + +static void +signal_evt_to_cli (int code) +{ + if (vlib_get_thread_index () != 0) + vl_api_rpc_call_main_thread (signal_evt_to_cli_i, (u8 *) & code, + sizeof (code)); + else + signal_evt_to_cli_i (&code); +} + +static void +send_test_chunk (tclient_main_t * tm, session_t * s) +{ + u8 *test_data = tm->connect_test_data; + int test_buf_offset; + u32 bytes_this_chunk; + session_fifo_event_t evt; + svm_fifo_t *txf; + int rv; + + ASSERT (vec_len (test_data) > 0); + + test_buf_offset = s->bytes_sent % vec_len (test_data); + bytes_this_chunk = vec_len (test_data) - test_buf_offset; + bytes_this_chunk = bytes_this_chunk < s->bytes_to_send + ? bytes_this_chunk : s->bytes_to_send; + + txf = s->server_tx_fifo; + rv = svm_fifo_enqueue_nowait (txf, bytes_this_chunk, + test_data + test_buf_offset); + + /* If we managed to enqueue data... */ + if (rv > 0) + { + /* Account for it... */ + s->bytes_to_send -= rv; + s->bytes_sent += rv; + + if (SCTP_BUILTIN_CLIENT_DBG) + { + /* *INDENT-OFF* */ + ELOG_TYPE_DECLARE (e) = + { + .format = "tx-enq: xfer %d bytes, sent %u remain %u", + .format_args = "i4i4i4", + }; + /* *INDENT-ON* */ + struct + { + u32 data[3]; + } *ed; + ed = ELOG_DATA (&vlib_global_main.elog_main, e); + ed->data[0] = rv; + ed->data[1] = s->bytes_sent; + ed->data[2] = s->bytes_to_send; + } + + /* Poke the session layer */ + if (svm_fifo_set_event (txf)) + { + /* Fabricate TX event, send to vpp */ + evt.fifo = txf; + evt.event_type = FIFO_EVENT_APP_TX; + + if (svm_queue_add + (tm->vpp_event_queue[txf->master_thread_index], (u8 *) & evt, + 0 /* do wait for mutex */ )) + clib_warning ("could not enqueue event"); + } + } +} + +static void +receive_test_chunk (tclient_main_t * tm, session_t * s) +{ + svm_fifo_t *rx_fifo = s->server_rx_fifo; + u32 my_thread_index = vlib_get_thread_index (); + int n_read, i; + + /* Allow enqueuing of new event */ + // svm_fifo_unset_event (rx_fifo); + + if (tm->test_bytes) + { + n_read = svm_fifo_dequeue_nowait (rx_fifo, + vec_len (tm->rx_buf[my_thread_index]), + tm->rx_buf[my_thread_index]); + } + else + { + n_read = svm_fifo_max_dequeue (rx_fifo); + svm_fifo_dequeue_drop (rx_fifo, n_read); + } + + if (SCTP_BUILTIN_CLIENT_DBG) + clib_warning ("Receiving test chunk; n_read = %d", n_read); + + if (n_read > 0) + { + if (SCTP_BUILTIN_CLIENT_DBG) + { + /* *INDENT-OFF* */ + ELOG_TYPE_DECLARE (e) = + { + .format = "rx-deq: %d bytes", + .format_args = "i4", + }; + /* *INDENT-ON* */ + struct + { + u32 data[1]; + } *ed; + ed = ELOG_DATA (&vlib_global_main.elog_main, e); + ed->data[0] = n_read; + } + + if (tm->test_bytes) + { + for (i = 0; i < n_read; i++) + { + if (tm->rx_buf[my_thread_index][i] + != ((s->bytes_received + i) & 0xff)) + { + clib_warning ("read %d error at byte %lld, 0x%x not 0x%x", + n_read, s->bytes_received + i, + tm->rx_buf[my_thread_index][i], + ((s->bytes_received + i) & 0xff)); + tm->test_failed = 1; + } + } + } + + if (s->bytes_to_receive < n_read) + { + s->bytes_to_receive = 0; + s->bytes_received += s->bytes_received; + } + else + { + s->bytes_to_receive -= n_read; + s->bytes_received += n_read; + } + } +} + +static uword +builtin_client_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + tclient_main_t *tm = &tclient_main; + int my_thread_index = vlib_get_thread_index (); + session_t *sp; + int i; + int delete_session; + u32 *connection_indices; + u32 *connections_this_batch; + u32 nconnections_this_batch; + + connection_indices = tm->connection_index_by_thread[my_thread_index]; + connections_this_batch = + tm->connections_this_batch_by_thread[my_thread_index]; + + if ((tm->run_test == 0) || + ((vec_len (connection_indices) == 0) + && vec_len (connections_this_batch) == 0)) + return 0; + + /* Grab another pile of connections */ + if (PREDICT_FALSE (vec_len (connections_this_batch) == 0)) + { + nconnections_this_batch = + clib_min (tm->connections_per_batch, vec_len (connection_indices)); + + ASSERT (nconnections_this_batch > 0); + vec_validate (connections_this_batch, nconnections_this_batch - 1); + clib_memcpy (connections_this_batch, + connection_indices + vec_len (connection_indices) + - nconnections_this_batch, + nconnections_this_batch * sizeof (u32)); + _vec_len (connection_indices) -= nconnections_this_batch; + } + + if (PREDICT_FALSE (tm->prev_conns != tm->connections_per_batch + && tm->prev_conns == vec_len (connections_this_batch))) + { + tm->repeats++; + tm->prev_conns = vec_len (connections_this_batch); + if (tm->repeats == 500000) + { + clib_warning ("stuck clients"); + } + } + else + { + tm->prev_conns = vec_len (connections_this_batch); + tm->repeats = 0; + } + + for (i = 0; i < vec_len (connections_this_batch); i++) + { + delete_session = 1; + + sp = pool_elt_at_index (tm->sessions, connections_this_batch[i]); + + if (sp->bytes_to_send > 0) + { + send_test_chunk (tm, sp); + delete_session = 0; + } + + if (sp->bytes_to_receive > 0) + { + receive_test_chunk (tm, sp); + delete_session = 0; + } + if (PREDICT_FALSE (delete_session == 1)) + { + u32 index, thread_index; + stream_session_t *s; + + __sync_fetch_and_add (&tm->tx_total, sp->bytes_sent); + __sync_fetch_and_add (&tm->rx_total, sp->bytes_received); + + session_parse_handle (sp->vpp_session_handle, + &index, &thread_index); + s = session_get_if_valid (index, thread_index); + + if (s) + { + vnet_disconnect_args_t _a, *a = &_a; + a->handle = session_handle (s); + a->app_index = tm->app_index; + vnet_disconnect_session (a); + + vec_delete (connections_this_batch, 1, i); + i--; + __sync_fetch_and_add (&tm->ready_connections, -1); + } + else + clib_warning ("session AWOL?"); + + /* Kick the debug CLI process */ + if (tm->ready_connections == 0) + { + signal_evt_to_cli (2); + } + } + } + + tm->connection_index_by_thread[my_thread_index] = connection_indices; + tm->connections_this_batch_by_thread[my_thread_index] = + connections_this_batch; + return 0; +} + +/* *INDENT-OFF* */ +VLIB_REGISTER_NODE (builtin_sctp_client_node) = +{ + .function = builtin_client_node_fn, + .name = "builtin-sctp-client", + .type = VLIB_NODE_TYPE_INPUT, + .state = VLIB_NODE_STATE_DISABLED, +}; +/* *INDENT-ON* */ + +static int +create_api_loopback (tclient_main_t * tm) +{ + api_main_t *am = &api_main; + vl_shmem_hdr_t *shmem_hdr; + + shmem_hdr = am->shmem_hdr; + tm->vl_input_queue = shmem_hdr->vl_input_queue; + tm->my_client_index = + vl_api_memclnt_create_internal ("sctp_test_client", tm->vl_input_queue); + return 0; +} + +static int +sctp_test_clients_init (vlib_main_t * vm) +{ + tclient_main_t *tm = &tclient_main; + vlib_thread_main_t *vtm = vlib_get_thread_main (); + u32 num_threads; + int i; + + if (create_api_loopback (tm)) + return -1; + + num_threads = 1 /* main thread */ + vtm->n_threads; + + /* Init test data. Big buffer */ + vec_validate (tm->connect_test_data, 1024 * 1024 - 1); + for (i = 0; i < vec_len (tm->connect_test_data); i++) + tm->connect_test_data[i] = i & 0xff; + + vec_validate (tm->rx_buf, num_threads - 1); + for (i = 0; i < num_threads; i++) + vec_validate (tm->rx_buf[i], vec_len (tm->connect_test_data) - 1); + + tm->is_init = 1; + + vec_validate (tm->connection_index_by_thread, vtm->n_vlib_mains); + vec_validate (tm->connections_this_batch_by_thread, vtm->n_vlib_mains); + vec_validate (tm->vpp_event_queue, vtm->n_vlib_mains); + + return 0; +} + +static int +builtin_session_connected_callback (u32 app_index, u32 api_context, + stream_session_t * s, u8 is_fail) +{ + tclient_main_t *tm = &tclient_main; + session_t *session; + u32 session_index; + u8 thread_index = vlib_get_thread_index (); + + if (is_fail) + { + clib_warning ("connection %d failed!", api_context); + signal_evt_to_cli (-1); + return 0; + } + + ASSERT (s->thread_index == thread_index); + + if (!tm->vpp_event_queue[thread_index]) + tm->vpp_event_queue[thread_index] = + session_manager_get_vpp_event_queue (thread_index); + + /* + * Setup session + */ + clib_spinlock_lock_if_init (&tm->sessions_lock); + pool_get (tm->sessions, session); + clib_spinlock_unlock_if_init (&tm->sessions_lock); + + memset (session, 0, sizeof (*session)); + session_index = session - tm->sessions; + session->bytes_to_send = tm->bytes_to_send; + session->bytes_to_receive = tm->no_return ? 0ULL : tm->bytes_to_send; + session->server_rx_fifo = s->server_rx_fifo; + session->server_rx_fifo->client_session_index = session_index; + session->server_tx_fifo = s->server_tx_fifo; + session->server_tx_fifo->client_session_index = session_index; + session->vpp_session_handle = session_handle (s); + + vec_add1 (tm->connection_index_by_thread[thread_index], session_index); + __sync_fetch_and_add (&tm->ready_connections, 1); + if (tm->ready_connections == tm->expected_connections) + { + tm->run_test = 1; + /* Signal the CLI process that the action is starting... */ + signal_evt_to_cli (1); + } + + return 0; +} + +static void +builtin_session_reset_callback (stream_session_t * s) +{ + if (s->session_state == SESSION_STATE_READY) + clib_warning ("Reset active connection %U", format_stream_session, s, 2); + stream_session_cleanup (s); + return; +} + +static int +builtin_session_create_callback (stream_session_t * s) +{ + return 0; +} + +static void +builtin_session_disconnect_callback (stream_session_t * s) +{ + tclient_main_t *tm = &tclient_main; + vnet_disconnect_args_t _a, *a = &_a; + a->handle = session_handle (s); + a->app_index = tm->app_index; + vnet_disconnect_session (a); + return; +} + +static int +builtin_server_rx_callback (stream_session_t * s) +{ + return 0; +} + +/* *INDENT-OFF* */ +static session_cb_vft_t builtin_clients = { + .session_reset_callback = builtin_session_reset_callback, + .session_connected_callback = builtin_session_connected_callback, + .session_accept_callback = builtin_session_create_callback, + .session_disconnect_callback = builtin_session_disconnect_callback, + .builtin_server_rx_callback = builtin_server_rx_callback +}; +/* *INDENT-ON* */ + +static clib_error_t * +attach_builtin_test_clients_app (u8 * appns_id, u64 appns_flags, + u64 appns_secret) +{ + u32 segment_name_length, prealloc_fifos, segment_size = 2 << 20; + tclient_main_t *tm = &tclient_main; + vnet_app_attach_args_t _a, *a = &_a; + u8 segment_name[128]; + u64 options[16]; + clib_error_t *error = 0; + + segment_name_length = ARRAY_LEN (segment_name); + + memset (a, 0, sizeof (*a)); + memset (options, 0, sizeof (options)); + + a->api_client_index = tm->my_client_index; + a->segment_name = segment_name; + a->segment_name_length = segment_name_length; + a->session_cb_vft = &builtin_clients; + + prealloc_fifos = tm->prealloc_fifos ? tm->expected_connections : 1; + + if (tm->private_segment_size) + segment_size = tm->private_segment_size; + + options[APP_OPTIONS_ACCEPT_COOKIE] = 0x12345678; + options[APP_OPTIONS_SEGMENT_SIZE] = segment_size; + options[APP_OPTIONS_RX_FIFO_SIZE] = tm->fifo_size; + options[APP_OPTIONS_TX_FIFO_SIZE] = tm->fifo_size; + options[APP_OPTIONS_PRIVATE_SEGMENT_COUNT] = tm->private_segment_count; + options[APP_OPTIONS_PREALLOC_FIFO_PAIRS] = prealloc_fifos; + + options[APP_OPTIONS_FLAGS] = APP_OPTIONS_FLAGS_IS_BUILTIN; + if (appns_id) + { + options[APP_OPTIONS_FLAGS] |= appns_flags; + options[APP_OPTIONS_NAMESPACE_SECRET] = appns_secret; + } + a->options = options; + a->namespace_id = appns_id; + + if ((error = vnet_application_attach (a))) + return error; + + tm->app_index = a->app_index; + return 0; +} + +static void * +tclient_thread_fn (void *arg) +{ + return 0; +} + +/** Start a transmit thread */ +int +start_tx_pthread_sctp (tclient_main_t * tm) +{ + if (tm->client_thread_handle == 0) + { + int rv = pthread_create (&tm->client_thread_handle, + NULL /*attr */ , + tclient_thread_fn, 0); + if (rv) + { + tm->client_thread_handle = 0; + return -1; + } + } + return 0; +} + +clib_error_t * +clients_connect_sctp (vlib_main_t * vm, u8 * uri, u32 n_clients) +{ + tclient_main_t *tm = &tclient_main; + vnet_connect_args_t _a, *a = &_a; + clib_error_t *error = 0; + int i; + for (i = 0; i < n_clients; i++) + { + memset (a, 0, sizeof (*a)); + + a->uri = (char *) uri; + a->api_context = i; + a->app_index = tm->app_index; + a->mp = 0; + + if ((error = vnet_connect_uri (a))) + return error; + + + /* Crude pacing for call setups */ + if ((i % 4) == 0) + vlib_process_suspend (vm, 10e-6); + ASSERT (i + 1 >= tm->ready_connections); + while (i + 1 - tm->ready_connections > 1000) + { + vlib_process_suspend (vm, 100e-6); + } + } + return 0; +} + +#define CLI_OUTPUT(_fmt, _args...) \ + if (!tm->no_output) \ + vlib_cli_output(vm, _fmt, ##_args) + +static clib_error_t * +test_sctp_clients_command_fn (vlib_main_t * vm, + unformat_input_t * input, + vlib_cli_command_t * cmd) +{ + tclient_main_t *tm = &tclient_main; + vlib_thread_main_t *thread_main = vlib_get_thread_main (); + uword *event_data = 0, event_type; + u8 *default_connect_uri = (u8 *) "sctp://6.0.1.1/1234", *uri, *appns_id = 0; + u64 tmp, total_bytes, appns_flags = 0, appns_secret = 0; + f64 test_timeout = 20.0, syn_timeout = 20.0, delta; + f64 time_before_connects; + u32 n_clients = 1; + int preallocate_sessions = 0; + char *transfer_type; + clib_error_t *error = 0; + int i; + + tm->bytes_to_send = 8192; + tm->no_return = 0; + tm->fifo_size = 64 << 10; + tm->connections_per_batch = 1000; + tm->private_segment_count = 0; + tm->private_segment_size = 0; + tm->no_output = 0; + tm->test_bytes = 0; + tm->test_failed = 0; + tm->vlib_main = vm; + if (thread_main->n_vlib_mains > 1) + clib_spinlock_init (&tm->sessions_lock); + vec_free (tm->connect_uri); + + while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) + { + if (unformat (input, "nclients %d", &n_clients)) + ; + else if (unformat (input, "mbytes %lld", &tmp)) + tm->bytes_to_send = tmp << 20; + else if (unformat (input, "gbytes %lld", &tmp)) + tm->bytes_to_send = tmp << 30; + else if (unformat (input, "bytes %lld", &tm->bytes_to_send)) + ; + else if (unformat (input, "uri %s", &tm->connect_uri)) + ; + else if (unformat (input, "test-timeout %f", &test_timeout)) + ; + else if (unformat (input, "syn-timeout %f", &syn_timeout)) + ; + else if (unformat (input, "no-return")) + tm->no_return = 1; + else if (unformat (input, "fifo-size %d", &tm->fifo_size)) + tm->fifo_size <<= 10; + else if (unformat (input, "private-segment-count %d", + &tm->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); + tm->private_segment_size = tmp; + } + else if (unformat (input, "preallocate-fifos")) + tm->prealloc_fifos = 1; + else if (unformat (input, "preallocate-sessions")) + preallocate_sessions = 1; + else + if (unformat (input, "client-batch %d", &tm->connections_per_batch)) + ; + 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, "no-output")) + tm->no_output = 1; + else if (unformat (input, "test-bytes")) + tm->test_bytes = 1; + else + return clib_error_return (0, "unknown input `%U'", + format_unformat_error, input); + } + + /* Store cli process node index for signalling */ + tm->cli_node_index = vlib_get_current_process (vm)->node_runtime.node_index; + + if (tm->is_init == 0) + { + if (sctp_test_clients_init (vm)) + return clib_error_return (0, "failed init"); + } + + tm->ready_connections = 0; + tm->expected_connections = n_clients; + tm->rx_total = 0; + tm->tx_total = 0; + + uri = default_connect_uri; + if (tm->connect_uri) + uri = tm->connect_uri; + +#if SCTP_BUILTIN_CLIENT_PTHREAD + start_tx_pthread (); +#endif + + vlib_worker_thread_barrier_sync (vm); + vnet_session_enable_disable (vm, 1 /* turn on SCTP, etc. */ ); + vlib_worker_thread_barrier_release (vm); + + if (tm->test_client_attached == 0) + { + if ((error = attach_builtin_test_clients_app (appns_id, appns_flags, + appns_secret))) + { + vec_free (appns_id); + clib_error_report (error); + return error; + } + vec_free (appns_id); + } + tm->test_client_attached = 1; + + /* Turn on the builtin client input nodes */ + for (i = 0; i < thread_main->n_vlib_mains; i++) + vlib_node_set_state (vlib_mains[i], builtin_sctp_client_node.index, + VLIB_NODE_STATE_POLLING); + + if (preallocate_sessions) + { + session_t *sp __attribute__ ((unused)); + for (i = 0; i < n_clients; i++) + pool_get (tm->sessions, sp); + for (i = 0; i < n_clients; i++) + pool_put_index (tm->sessions, i); + } + + /* Fire off connect requests */ + time_before_connects = vlib_time_now (vm); + if ((error = clients_connect_sctp (vm, uri, n_clients))) + return error; + + /* Park until the sessions come up, or ten seconds elapse... */ + vlib_process_wait_for_event_or_clock (vm, syn_timeout); + + event_type = vlib_process_get_events (vm, &event_data); + switch (event_type) + { + case ~0: + CLI_OUTPUT ("Timeout with only %d sessions active...", + tm->ready_connections); + error = + clib_error_return (0, "failed: syn timeout (%f) with %d sessions", + syn_timeout, tm->ready_connections); + goto cleanup; + + case 1: + delta = vlib_time_now (vm) - time_before_connects; + if (delta != 0.0) + CLI_OUTPUT ("%d three-way handshakes in %.2f seconds %.2f/s", + n_clients, delta, ((f64) n_clients) / delta); + + tm->test_start_time = vlib_time_now (tm->vlib_main); + CLI_OUTPUT ("Test started at %.6f", tm->test_start_time); + break; + + default: + CLI_OUTPUT ("unexpected event(1): %d", event_type); + error = clib_error_return (0, "failed: unexpected event(1): %d", + event_type); + goto cleanup; + } + + /* Now wait for the sessions to finish... */ + vlib_process_wait_for_event_or_clock (vm, test_timeout); + event_type = vlib_process_get_events (vm, &event_data); + switch (event_type) + { + case ~0: + CLI_OUTPUT ("Timeout with %d sessions still active...", + tm->ready_connections); + error = clib_error_return (0, "failed: timeout with %d sessions", + tm->ready_connections); + goto cleanup; + + case 2: + tm->test_end_time = vlib_time_now (vm); + CLI_OUTPUT ("Test finished at %.6f", tm->test_end_time); + break; + + default: + CLI_OUTPUT ("unexpected event(2): %d", event_type); + error = clib_error_return (0, "failed: unexpected event(2): %d", + event_type); + goto cleanup; + } + + delta = tm->test_end_time - tm->test_start_time; + + if (delta != 0.0) + { + total_bytes = (tm->no_return ? tm->tx_total : tm->rx_total); + transfer_type = tm->no_return ? "half-duplex" : "full-duplex"; + CLI_OUTPUT ("%lld bytes (%lld mbytes, %lld gbytes) in %.2f seconds", + total_bytes, total_bytes / (1ULL << 20), + total_bytes / (1ULL << 30), delta); + CLI_OUTPUT ("%.2f bytes/second %s", ((f64) total_bytes) / (delta), + transfer_type); + CLI_OUTPUT ("%.4f gbit/second %s", + (((f64) total_bytes * 8.0) / delta / 1e9), transfer_type); + } + else + { + CLI_OUTPUT ("zero delta-t?"); + error = clib_error_return (0, "failed: zero delta-t"); + goto cleanup; + } + + if (tm->test_bytes && tm->test_failed) + error = clib_error_return (0, "failed: test bytes"); + +cleanup: + tm->run_test = 0; + for (i = 0; i < vec_len (tm->connection_index_by_thread); i++) + { + vec_reset_length (tm->connection_index_by_thread[i]); + vec_reset_length (tm->connections_this_batch_by_thread[i]); + } + + pool_free (tm->sessions); + + /* Detach the application, so we can use different fifo sizes next time */ + if (tm->test_client_attached) + { + vnet_app_detach_args_t _da, *da = &_da; + int rv; + + da->app_index = tm->app_index; + rv = vnet_application_detach (da); + if (rv) + { + error = clib_error_return (0, "failed: app detach"); + CLI_OUTPUT ("WARNING: app detach failed..."); + } + tm->test_client_attached = 0; + tm->app_index = ~0; + } + if (error) + CLI_OUTPUT ("test failed"); + return error; +} + +/* *INDENT-OFF* */ +VLIB_CLI_COMMAND (test_clients_command, static) = +{ + .path = "test sctp clients", + .short_help = "test sctp clients [nclients %d] [[m|g]bytes ] " + "[test-timeout