/* * builtin_client.c - vpp built-in tcp client/connect code * * Copyright (c) 2017 by 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 #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 #define TCP_BUILTIN_CLIENT_DBG (1) #define TCP_BUILTIN_CLIENT_VPP_THREAD (0) #define TCP_BUILTIN_CLIENT_PTHREAD (!TCP_BUILTIN_CLIENT_VPP_THREAD) 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; static int serial_number = 0; int rv; 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; rv = svm_fifo_enqueue_nowait (s->server_tx_fifo, 0 /*pid */ , bytes_this_chunk, test_data + test_buf_offset); /* If we managed to enqueue data... */ if (rv > 0) { if (TCP_BUILTIN_CLIENT_DBG) { /* *INDENT-OFF* */ ELOG_TYPE_DECLARE (e) = { .format = "tx-enq: %d bytes", .format_args = "i4", }; /* *INDENT-ON* */ struct { u32 data[1]; } *ed; ed = ELOG_DATA (&vlib_global_main.elog_main, e); ed->data[0] = rv; } /* Account for it... */ s->bytes_to_send -= rv; s->bytes_sent += rv; /* Poke the TCP state machine */ if (svm_fifo_set_event (s->server_tx_fifo)) { /* Fabricate TX event, send to vpp */ evt.fifo = s->server_tx_fifo; evt.event_type = FIFO_EVENT_SERVER_TX; evt.event_id = serial_number++; unix_shared_memory_queue_add (tm->vpp_event_queue, (u8 *) & evt, 0 /* do wait for mutex */ ); } } } static void receive_test_chunk (tclient_main_t * tm, session_t * s) { svm_fifo_t *rx_fifo = s->server_rx_fifo; int n_read, test_bytes = 0; /* Allow enqueuing of new event */ // svm_fifo_unset_event (rx_fifo); n_read = svm_fifo_dequeue_nowait (rx_fifo, 0, vec_len (tm->rx_buf), tm->rx_buf); if (n_read > 0) { if (TCP_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 (test_bytes) { int i; for (i = 0; i < n_read; i++) { if (tm->rx_buf[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[i], ((s->bytes_received + i) & 0xff)); } } } s->bytes_to_receive -= n_read; s->bytes_received += n_read; } } #if TCP_BUILTIN_CLIENT_VPP_THREAD static void #else static void * #endif tclient_thread_fn (void *arg) { tclient_main_t *tm = &tclient_main; vl_api_disconnect_session_t *dmp; session_t *sp; struct timespec ts, tsrem; int i; int try_tx, try_rx; u32 *session_indices = 0; /* stats thread wants no signals. */ { sigset_t s; sigfillset (&s); pthread_sigmask (SIG_SETMASK, &s, 0); } clib_per_cpu_mheaps[vlib_get_thread_index ()] = clib_per_cpu_mheaps[0]; while (1) { /* Wait until we're told to get busy */ while (tm->run_test == 0 || (tm->ready_connections != tm->expected_connections)) { ts.tv_sec = 0; ts.tv_nsec = 100000000; while (nanosleep (&ts, &tsrem) < 0) ts = tsrem; } tm->run_test = 0; clib_warning ("Run %d iterations", tm->n_iterations); for (i = 0; i < tm->n_iterations; i++) { session_t *sp; do { try_tx = try_rx = 0; /* *INDENT-OFF* */ pool_foreach (sp, tm->sessions, ({ if (sp->bytes_to_send > 0) { send_test_chunk (tm, sp); try_tx = 1; } })); pool_foreach (sp, tm->sessions, ({ if (sp->bytes_to_receive > 0) { receive_test_chunk (tm, sp); try_rx = 1; } })); /* *INDENT-ON* */ } while (try_tx || try_rx); } clib_warning ("Done %d iterations", tm->n_iterations); /* Disconnect sessions... */ vec_reset_length (session_indices); /* *INDENT-OFF* */ pool_foreach (sp, tm->sessions, ({ vec_add1 (session_indices, sp - tm->sessions); })); /* *INDENT-ON* */ for (i = 0; i < vec_len (session_indices); i++) { sp = pool_elt_at_index (tm->sessions, session_indices[i]); dmp = vl_msg_api_alloc_as_if_client (sizeof (*dmp)); memset (dmp, 0, sizeof (*dmp)); dmp->_vl_msg_id = ntohs (VL_API_DISCONNECT_SESSION); dmp->client_index = tm->my_client_index; dmp->session_index = sp->vpp_session_index; dmp->session_thread_index = sp->vpp_session_thread; vl_msg_api_send_shmem (tm->vl_input_queue, (u8 *) & dmp); pool_put (tm->sessions, sp); } } /* NOTREACHED */ #if TCP_BUILTIN_CLIENT_PTHREAD return 0; #endif } /* So we don't get "no handler for... " msgs */ static void vl_api_memclnt_create_reply_t_handler (vl_api_memclnt_create_reply_t * mp) { tclient_main_t *tm = &tclient_main; tm->my_client_index = mp->index; } static void vl_api_connect_uri_reply_t_handler (vl_api_connect_uri_reply_t * mp) { tclient_main_t *tm = &tclient_main; session_t *session; u32 session_index; u64 key; i32 retval = /* clib_net_to_host_u32 ( */ mp->retval /*) */ ; if (retval < 0) { clib_warning ("connection failed: retval %d", retval); return; } tm->our_event_queue = (unix_shared_memory_queue_t *) mp->vpp_event_queue_address; tm->vpp_event_queue = (unix_shared_memory_queue_t *) mp->vpp_event_queue_address; /* * Setup session */ pool_get (tm->sessions, session); memset (session, 0, sizeof (*session)); session_index = session - tm->sessions; session->bytes_to_receive = session->bytes_to_send = tm->bytes_to_send; session->server_rx_fifo = (svm_fifo_t *) mp->server_rx_fifo; session->server_rx_fifo->client_session_index = session_index; session->server_tx_fifo = (svm_fifo_t *) mp->server_tx_fifo; session->server_tx_fifo->client_session_index = session_index; session->vpp_session_index = mp->session_index; session->vpp_session_thread = mp->session_thread_index; /* Add it to the session lookup table */ key = (((u64) mp->session_thread_index) << 32) | (u64) mp->session_index; hash_set (tm->session_index_by_vpp_handles, key, session_index); tm->ready_connections++; } static void create_api_loopback (tclient_main_t * tm) { 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; /* * Create a "loopback" API client connection * Don't do things like this unless you know what you're doing... */ shmem_hdr = am->shmem_hdr; tm->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 = (u64) tm->vl_input_queue; strncpy ((char *) mp->name, "tcp_tester", sizeof (mp->name) - 1); vl_api_memclnt_create_t_handler (mp); } #define foreach_tclient_static_api_msg \ _(MEMCLNT_CREATE_REPLY, memclnt_create_reply) \ _(CONNECT_URI_REPLY, connect_uri_reply) static clib_error_t * tclient_api_hookup (vlib_main_t * vm) { tclient_main_t *tm = &tclient_main; vl_msg_api_msg_config_t _c, *c = &_c; int i; /* Init test data */ vec_validate (tm->connect_test_data, 64 * 1024 - 1); for (i = 0; i < vec_len (tm->connect_test_data); i++) tm->connect_test_data[i] = i & 0xff; tm->session_index_by_vpp_handles = hash_create (0, sizeof (uword)); vec_validate (tm->rx_buf, vec_len (tm->connect_test_data) - 1); /* 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_tclient_static_api_msg; #undef _ return 0; } VLIB_API_INIT_FUNCTION (tclient_api_hookup); static clib_error_t * test_tcp_clients_command_fn (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { u8 *connect_uri = (u8 *) "tcp://6.0.1.1/1234"; u8 *uri; tclient_main_t *tm = &tclient_main; int i; u32 n_clients = 1; tm->bytes_to_send = 8192; tm->n_iterations = 1; 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, "iterations %d", &tm->n_iterations)) ; else if (unformat (input, "bytes %lld", &tm->bytes_to_send)) ; else if (unformat (input, "uri %s", &tm->connect_uri)) ; else return clib_error_return (0, "unknown input `%U'", format_unformat_error, input); } tm->ready_connections = 0; tm->expected_connections = n_clients; uri = connect_uri; if (tm->connect_uri) uri = tm->connect_uri; create_api_loopback (tm); #if TCP_BUILTIN_CLIENT_PTHREAD /* Start a transmit thread */ 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 clib_error_return (0, "pthread_create returned %d", rv); } } #endif vnet_session_enable_disable (vm, 1 /* turn on TCP, etc. */ ); /* Fire off connect requests, in something approaching a normal manner */ for (i = 0; i < n_clients; i++) { vl_api_connect_uri_t *cmp; cmp = vl_msg_api_alloc_as_if_client (sizeof (*cmp)); memset (cmp, 0, sizeof (*cmp)); cmp->_vl_msg_id = ntohs (VL_API_CONNECT_URI); cmp->client_index = tm->my_client_index; cmp->context = ntohl (0xfeedface); memcpy (cmp->uri, uri, strlen ((char *) uri) + 1); vl_msg_api_send_shmem (tm->vl_input_queue, (u8 *) & cmp); } tm->run_test = 1; return 0; } #if TCP_BUILTIN_CLIENT_VPP_THREAD /* *INDENT-OFF* */ VLIB_REGISTER_THREAD (builtin_client_reg, static) = { .name = "tcp-builtin-client", .function = tclient_thread_fn, .fixed_count = 1, .count = 1, .no_data_structure_clone = 1, }; /* *INDENT-ON* */ #endif /* *INDENT-OFF* */ VLIB_CLI_COMMAND (test_clients_command, static) = { .path = "test tcp clients", .short_help = "test tcp clients [nclients %d] [iterations %d] [bytes %d] [uri tcp://1.2.3.4/1234]", .function = test_tcp_clients_command_fn, }; /* *INDENT-ON* */ /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */