/* * Copyright (c) 2016 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 #include #include #include #include #include #include #include #include #include #include #define vl_typedefs /* define message structures */ #include #undef vl_typedefs /* declare message handlers for each api */ #define vl_endianfun /* define message structures */ #include #undef vl_endianfun /* instantiate all the print functions we know about */ #define vl_print(handle, ...) #define vl_printfun #include #undef vl_printfun typedef enum { STATE_START, STATE_ATTACHED, STATE_BOUND, STATE_READY, STATE_FAILED, STATE_DISCONNECTING, STATE_DETACHED } connection_state_t; typedef struct { /* vpe input queue */ svm_queue_t *vl_input_queue; /* API client handle */ u32 my_client_index; /* The URI we're playing with */ u8 *listen_uri; /* URI for connect */ u8 *connect_uri; /* Session pool */ app_session_t *sessions; /* Hash table for disconnect processing */ uword *session_index_by_vpp_handles; /* fifo segment */ svm_fifo_segment_private_t *seg; /* intermediate rx buffer */ u8 *rx_buf; u32 fifo_size; int i_am_server; u8 is_connected; /* Our event queue */ svm_msg_q_t *our_event_queue; svm_msg_q_t *ct_event_queue; /* $$$ single thread only for the moment */ svm_msg_q_t *vpp_event_queue; /* $$$$ hack: cut-through session index */ volatile u32 cut_through_session_index; volatile u32 connected_session; /* unique segment name counter */ u32 unique_segment_index; pid_t my_pid; /* pthread handle */ pthread_t cut_through_thread_handle; /* For deadman timers */ clib_time_t clib_time; /* State of the connection, shared between msg RX thread and main thread */ volatile connection_state_t state; volatile int time_to_stop; volatile int time_to_print_stats; u32 configured_segment_size; /* VNET_API_ERROR_FOO -> "Foo" hash table */ uword *error_string_by_error_number; /* convenience */ svm_fifo_segment_main_t *segment_main; u8 *connect_test_data; uword *segments_table; u8 do_echo; u8 have_return; u64 total_to_send; u64 bytes_to_send; u64 bytes_sent; } udp_echo_main_t; udp_echo_main_t udp_echo_main; static void stop_signal (int signum) { udp_echo_main_t *um = &udp_echo_main; um->time_to_stop = 1; } static void stats_signal (int signum) { udp_echo_main_t *um = &udp_echo_main; um->time_to_print_stats = 1; } static clib_error_t * setup_signal_handlers (void) { signal (SIGINT, stats_signal); signal (SIGQUIT, stop_signal); signal (SIGTERM, stop_signal); return 0; } uword unformat_ip4_address (unformat_input_t * input, va_list * args) { u8 *result = va_arg (*args, u8 *); unsigned a[4]; if (!unformat (input, "%d.%d.%d.%d", &a[0], &a[1], &a[2], &a[3])) return 0; if (a[0] >= 256 || a[1] >= 256 || a[2] >= 256 || a[3] >= 256) return 0; result[0] = a[0]; result[1] = a[1]; result[2] = a[2]; result[3] = a[3]; return 1; } uword unformat_ip6_address (unformat_input_t * input, va_list * args) { ip6_address_t *result = va_arg (*args, ip6_address_t *); u16 hex_quads[8]; uword hex_quad, n_hex_quads, hex_digit, n_hex_digits; uword c, n_colon, double_colon_index; n_hex_quads = hex_quad = n_hex_digits = n_colon = 0; double_colon_index = ARRAY_LEN (hex_quads); while ((c = unformat_get_input (input)) != UNFORMAT_END_OF_INPUT) { hex_digit = 16; if (c >= '0' && c <= '9') hex_digit = c - '0'; else if (c >= 'a' && c <= 'f') hex_digit = c + 10 - 'a'; else if (c >= 'A' && c <= 'F') hex_digit = c + 10 - 'A'; else if (c == ':' && n_colon < 2) n_colon++; else { unformat_put_input (input); break; } /* Too many hex quads. */ if (n_hex_quads >= ARRAY_LEN (hex_quads)) return 0; if (hex_digit < 16) { hex_quad = (hex_quad << 4) | hex_digit; /* Hex quad must fit in 16 bits. */ if (n_hex_digits >= 4) return 0; n_colon = 0; n_hex_digits++; } /* Save position of :: */ if (n_colon == 2) { /* More than one :: ? */ if (double_colon_index < ARRAY_LEN (hex_quads)) return 0; double_colon_index = n_hex_quads; } if (n_colon > 0 && n_hex_digits > 0) { hex_quads[n_hex_quads++] = hex_quad; hex_quad = 0; n_hex_digits = 0; } } if (n_hex_digits > 0) hex_quads[n_hex_quads++] = hex_quad; { word i; /* Expand :: to appropriate number of zero hex quads. */ if (double_colon_index < ARRAY_LEN (hex_quads)) { word n_zero = ARRAY_LEN (hex_quads) - n_hex_quads; for (i = n_hex_quads - 1; i >= (signed) double_colon_index; i--) hex_quads[n_zero + i] = hex_quads[i]; for (i = 0; i < n_zero; i++) hex_quads[double_colon_index + i] = 0; n_hex_quads = ARRAY_LEN (hex_quads); } /* Too few hex quads given. */ if (n_hex_quads < ARRAY_LEN (hex_quads)) return 0; for (i = 0; i < ARRAY_LEN (hex_quads); i++) result->as_u16[i] = clib_host_to_net_u16 (hex_quads[i]); return 1; } } uword unformat_uri (unformat_input_t * input, va_list * args) { session_endpoint_cfg_t *sep = va_arg (*args, session_endpoint_cfg_t *); u32 port; char *tmp; if (unformat (input, "%s://%U/%d", &tmp, unformat_ip4_address, &sep->ip.ip4, &port)) { sep->port = clib_host_to_net_u16 (port); sep->is_ip4 = 1; return 1; } else if (unformat (input, "%s://%U/%d", &tmp, unformat_ip6_address, &sep->ip.ip6, &port)) { sep->port = clib_host_to_net_u16 (port); sep->is_ip4 = 0; return 1; } return 0; } static void application_send_attach (udp_echo_main_t * utm) { vl_api_application_attach_t *bmp; bmp = vl_msg_api_alloc (sizeof (*bmp)); clib_memset (bmp, 0, sizeof (*bmp)); bmp->_vl_msg_id = ntohs (VL_API_APPLICATION_ATTACH); bmp->client_index = utm->my_client_index; bmp->context = ntohl (0xfeedface); bmp->options[APP_OPTIONS_FLAGS] = APP_OPTIONS_FLAGS_ADD_SEGMENT; bmp->options[APP_OPTIONS_FLAGS] |= APP_OPTIONS_FLAGS_USE_GLOBAL_SCOPE; bmp->options[APP_OPTIONS_FLAGS] |= APP_OPTIONS_FLAGS_USE_LOCAL_SCOPE; bmp->options[APP_OPTIONS_FLAGS] |= APP_OPTIONS_FLAGS_USE_MQ_FOR_CTRL_MSGS; bmp->options[APP_OPTIONS_PREALLOC_FIFO_PAIRS] = 2; bmp->options[APP_OPTIONS_RX_FIFO_SIZE] = utm->fifo_size; bmp->options[APP_OPTIONS_TX_FIFO_SIZE] = utm->fifo_size; bmp->options[APP_OPTIONS_ADD_SEGMENT_SIZE] = 128 << 20; bmp->options[APP_OPTIONS_SEGMENT_SIZE] = 256 << 20; bmp->options[APP_OPTIONS_EVT_QUEUE_SIZE] = 16768; vl_msg_api_send_shmem (utm->vl_input_queue, (u8 *) & bmp); } void application_detach (udp_echo_main_t * utm) { vl_api_application_detach_t *bmp; bmp = vl_msg_api_alloc (sizeof (*bmp)); clib_memset (bmp, 0, sizeof (*bmp)); bmp->_vl_msg_id = ntohs (VL_API_APPLICATION_DETACH); bmp->client_index = utm->my_client_index; bmp->context = ntohl (0xfeedface); vl_msg_api_send_shmem (utm->vl_input_queue, (u8 *) & bmp); } static void vl_api_application_attach_reply_t_handler (vl_api_application_attach_reply_t * mp) { udp_echo_main_t *utm = &udp_echo_main; svm_fifo_segment_create_args_t _a = { 0 }, *a = &_a; int rv; if (mp->retval) { clib_warning ("attach failed: %d", mp->retval); utm->state = STATE_FAILED; return; } if (mp->segment_name_length == 0) { clib_warning ("segment_name_length zero"); return; } a->segment_name = (char *) mp->segment_name; a->segment_size = mp->segment_size; ASSERT (mp->app_event_queue_address); /* Attach to the segment vpp created */ rv = svm_fifo_segment_attach (a); if (rv) { clib_warning ("svm_fifo_segment_attach ('%s') failed", mp->segment_name); return; } utm->our_event_queue = uword_to_pointer (mp->app_event_queue_address, svm_msg_q_t *); utm->state = STATE_ATTACHED; } static void vl_api_application_detach_reply_t_handler (vl_api_application_detach_reply_t * mp) { if (mp->retval) clib_warning ("detach returned with err: %d", mp->retval); udp_echo_main.state = STATE_DETACHED; } u8 * format_api_error (u8 * s, va_list * args) { udp_echo_main_t *utm = va_arg (*args, udp_echo_main_t *); i32 error = va_arg (*args, u32); uword *p; p = hash_get (utm->error_string_by_error_number, -error); if (p) s = format (s, "%s", p[0]); else s = format (s, "%d", error); return s; } int wait_for_state_change (udp_echo_main_t * utm, connection_state_t state) { #if CLIB_DEBUG > 0 #define TIMEOUT 600.0 #else #define TIMEOUT 600.0 #endif f64 timeout = clib_time_now (&utm->clib_time) + TIMEOUT; while (clib_time_now (&utm->clib_time) < timeout) { if (utm->state == state) return 0; if (utm->state == STATE_FAILED) return -1; } return -1; } u64 server_bytes_received, server_bytes_sent; static void * cut_through_thread_fn (void *arg) { app_session_t *s; svm_fifo_t *rx_fifo; svm_fifo_t *tx_fifo; u8 *my_copy_buffer = 0; udp_echo_main_t *utm = &udp_echo_main; i32 actual_transfer; int rv, do_dequeue = 0; u32 buffer_offset; while (utm->cut_through_session_index == ~0) ; s = pool_elt_at_index (utm->sessions, utm->cut_through_session_index); rx_fifo = s->rx_fifo; tx_fifo = s->tx_fifo; vec_validate (my_copy_buffer, 64 * 1024 - 1); while (1) { do { /* We read from the tx fifo and write to the rx fifo */ if (utm->have_return || do_dequeue) actual_transfer = svm_fifo_dequeue_nowait (rx_fifo, vec_len (my_copy_buffer), my_copy_buffer); else { /* We don't do anything with the data, drop it */ actual_transfer = svm_fifo_max_dequeue (rx_fifo); svm_fifo_dequeue_drop (rx_fifo, actual_transfer); } } while (actual_transfer <= 0); server_bytes_received += actual_transfer; if (utm->have_return) { buffer_offset = 0; while (actual_transfer > 0) { rv = svm_fifo_enqueue_nowait (tx_fifo, actual_transfer, my_copy_buffer + buffer_offset); if (rv > 0) { actual_transfer -= rv; buffer_offset += rv; server_bytes_sent += rv; } } } if (PREDICT_FALSE (utm->time_to_stop)) break; } pthread_exit (0); } static void session_accepted_handler (session_accepted_msg_t * mp) { app_session_evt_t _app_evt, *app_evt = &_app_evt; udp_echo_main_t *utm = &udp_echo_main; session_accepted_reply_msg_t *rmp; svm_fifo_t *rx_fifo, *tx_fifo; app_session_t *session; static f64 start_time; u32 session_index; int rv = 0; if (start_time == 0.0) start_time = clib_time_now (&utm->clib_time); utm->vpp_event_queue = uword_to_pointer (mp->vpp_event_queue_address, svm_msg_q_t *); rx_fifo = uword_to_pointer (mp->server_rx_fifo, svm_fifo_t *); tx_fifo = uword_to_pointer (mp->server_tx_fifo, svm_fifo_t *); pool_get (utm->sessions, session); clib_memset (session, 0, sizeof (*session)); session_index = session - utm->sessions; session->session_index = session_index; /* Cut-through case */ if (mp->server_event_queue_address) { clib_warning ("cut-through session"); session->vpp_evt_q = uword_to_pointer (mp->client_event_queue_address, svm_msg_q_t *); sleep (1); rx_fifo->master_session_index = session_index; tx_fifo->master_session_index = session_index; utm->cut_through_session_index = session_index; session->rx_fifo = rx_fifo; session->tx_fifo = tx_fifo; session->is_dgram = 0; rv = pthread_create (&utm->cut_through_thread_handle, NULL /*attr */ , cut_through_thread_fn, 0); if (rv) { clib_warning ("pthread_create returned %d", rv); rv = VNET_API_ERROR_SYSCALL_ERROR_1; } } else { rx_fifo->client_session_index = session_index; tx_fifo->client_session_index = session_index; session->rx_fifo = rx_fifo; session->tx_fifo = tx_fifo; clib_memcpy_fast (&session->transport.rmt_ip, mp->ip, sizeof (ip46_address_t)); session->transport.is_ip4 = mp->is_ip4; session->transport.rmt_port = mp->port; } hash_set (utm->session_index_by_vpp_handles, mp->handle, session_index); if (pool_elts (utm->sessions) && (pool_elts (utm->sessions) % 20000) == 0) { f64 now = clib_time_now (&utm->clib_time); fformat (stdout, "%d active sessions in %.2f seconds, %.2f/sec...\n", pool_elts (utm->sessions), now - start_time, (f64) pool_elts (utm->sessions) / (now - start_time)); } app_alloc_ctrl_evt_to_vpp (utm->vpp_event_queue, app_evt, SESSION_CTRL_EVT_ACCEPTED_REPLY); rmp = (session_accepted_reply_msg_t *) app_evt->evt->data; rmp->handle = mp->handle; rmp->context = mp->context; rmp->retval = rv; app_send_ctrl_evt_to_vpp (utm->vpp_event_queue, app_evt); CLIB_MEMORY_BARRIER (); utm->state = STATE_READY; } static void session_disconnected_handler (session_disconnected_msg_t * mp) { app_session_evt_t _app_evt, *app_evt = &_app_evt; udp_echo_main_t *utm = &udp_echo_main; session_disconnected_reply_msg_t *rmp; app_session_t *session; uword *p; int rv = 0; p = hash_get (utm->session_index_by_vpp_handles, mp->handle); if (p) { session = pool_elt_at_index (utm->sessions, p[0]); hash_unset (utm->session_index_by_vpp_handles, mp->handle); clib_warning ("disconnecting %u", session->session_index); pool_put (utm->sessions, session); } else { clib_warning ("couldn't find session key %llx", mp->handle); return; } app_alloc_ctrl_evt_to_vpp (session->vpp_evt_q, app_evt, SESSION_CTRL_EVT_DISCONNECTED_REPLY); rmp = (session_disconnected_reply_msg_t *) app_evt->evt->data; rmp->retval = rv; rmp->handle = mp->handle; rmp->context = mp->context; app_send_ctrl_evt_to_vpp (session->vpp_evt_q, app_evt); } static void session_connected_handler (session_connected_msg_t * mp) { udp_echo_main_t *utm = &udp_echo_main; unformat_input_t _input, *input = &_input; session_endpoint_cfg_t _sep, *sep = &_sep; app_session_t *session; ASSERT (utm->i_am_server == 0); if (mp->retval) { clib_warning ("failed connect"); return; } ASSERT (mp->server_rx_fifo && mp->server_tx_fifo); pool_get (utm->sessions, session); session->session_index = session - utm->sessions; session->rx_fifo = uword_to_pointer (mp->server_rx_fifo, svm_fifo_t *); session->tx_fifo = uword_to_pointer (mp->server_tx_fifo, svm_fifo_t *); /* Cut-through case */ if (mp->client_event_queue_address) { clib_warning ("cut-through session"); session->vpp_evt_q = uword_to_pointer (mp->server_event_queue_address, svm_msg_q_t *); utm->ct_event_queue = uword_to_pointer (mp->client_event_queue_address, svm_msg_q_t *); utm->cut_through_session_index = session->session_index; session->is_dgram = 0; sleep (1); session->rx_fifo->client_session_index = session->session_index; session->tx_fifo->client_session_index = session->session_index; } else { utm->connected_session = session->session_index; utm->vpp_event_queue = uword_to_pointer (mp->vpp_event_queue_address, svm_msg_q_t *); session->rx_fifo->client_session_index = session->session_index; session->tx_fifo->client_session_index = session->session_index; clib_memcpy_fast (&session->transport.lcl_ip, mp->lcl_ip, sizeof (ip46_address_t)); session->transport.is_ip4 = mp->is_ip4; session->transport.lcl_port = mp->lcl_port; unformat_init_vector (input, utm->connect_uri); if (!unformat (input, "%U", unformat_uri, sep)) { clib_warning ("can't figure out remote ip and port"); utm->state = STATE_FAILED; unformat_free (input); return; } unformat_free (input); clib_memcpy_fast (&session->transport.rmt_ip, &sep->ip, sizeof (ip46_address_t)); session->transport.rmt_port = sep->port; session->is_dgram = !utm->is_connected; } utm->state = STATE_READY; } static void session_bound_handler (session_bound_msg_t * mp) { udp_echo_main_t *utm = &udp_echo_main; svm_fifo_t *rx_fifo, *tx_fifo; app_session_t *session; u32 session_index; if (mp->retval) { clib_warning ("bind failed: %d", mp->retval); utm->state = STATE_FAILED; return; } rx_fifo = uword_to_pointer (mp->rx_fifo, svm_fifo_t *); tx_fifo = uword_to_pointer (mp->tx_fifo, svm_fifo_t *); pool_get (utm->sessions, session); clib_memset (session, 0, sizeof (*session)); session_index = session - utm->sessions; rx_fifo->client_session_index = session_index; tx_fifo->client_session_index = session_index; session->rx_fifo = rx_fifo; session->tx_fifo = tx_fifo; clib_memcpy_fast (&session->transport.lcl_ip, mp->lcl_ip, sizeof (ip46_address_t)); session->transport.is_ip4 = mp->lcl_is_ip4; session->transport.lcl_port = mp->lcl_port; session->vpp_evt_q = uword_to_pointer (mp->vpp_evt_q, svm_msg_q_t *); utm->state = utm->is_connected ? STATE_BOUND : STATE_READY; } static void handle_mq_event (session_event_t * e) { switch (e->event_type) { case SESSION_CTRL_EVT_BOUND: session_bound_handler ((session_bound_msg_t *) e->data); break; case SESSION_CTRL_EVT_ACCEPTED: session_accepted_handler ((session_accepted_msg_t *) e->data); break; case SESSION_CTRL_EVT_CONNECTED: session_connected_handler ((session_connected_msg_t *) e->data); break; case SESSION_CTRL_EVT_DISCONNECTED: session_disconnected_handler ((session_disconnected_msg_t *) e->data); break; default: clib_warning ("unhandled %u", e->event_type); } } static void udp_client_send_connect (udp_echo_main_t * utm) { vl_api_connect_uri_t *cmp; cmp = vl_msg_api_alloc (sizeof (*cmp)); clib_memset (cmp, 0, sizeof (*cmp)); cmp->_vl_msg_id = ntohs (VL_API_CONNECT_URI); cmp->client_index = utm->my_client_index; cmp->context = ntohl (0xfeedface); memcpy (cmp->uri, utm->connect_uri, vec_len (utm->connect_uri)); vl_msg_api_send_shmem (utm->vl_input_queue, (u8 *) & cmp); } static void send_test_chunk (udp_echo_main_t * utm, app_session_t * s, u32 bytes) { u64 test_buf_len, bytes_this_chunk, test_buf_offset; u8 *test_data = utm->connect_test_data; u32 bytes_to_snd, enq_space, min_chunk; session_evt_type_t et = FIFO_EVENT_APP_TX; int written; test_buf_len = vec_len (test_data); test_buf_offset = utm->bytes_sent % test_buf_len; bytes_this_chunk = clib_min (test_buf_len - test_buf_offset, utm->bytes_to_send); enq_space = svm_fifo_max_enqueue (s->tx_fifo); bytes_this_chunk = clib_min (bytes_this_chunk, enq_space); et += (s->session_index == utm->cut_through_session_index); if (s->is_dgram) written = app_send_dgram_raw (s->tx_fifo, &s->transport, s->vpp_evt_q, test_data + test_buf_offset, bytes_this_chunk, et, SVM_Q_WAIT); else written = app_send_stream_raw (s->tx_fifo, s->vpp_evt_q, test_data + test_buf_offset, bytes_this_chunk, et, SVM_Q_WAIT); if (written > 0) { utm->bytes_to_send -= written; utm->bytes_sent += written; } } static void recv_test_chunk (udp_echo_main_t * utm, app_session_t * s) { app_recv (s, utm->rx_buf, vec_len (utm->rx_buf)); } void client_send_data (udp_echo_main_t * utm, u32 session_index) { f64 start_time, end_time, delta; app_session_t *session; char *transfer_type; u8 *test_data; int i; vec_validate_aligned (utm->connect_test_data, 1024 * 1024 - 1, CLIB_CACHE_LINE_BYTES); for (i = 0; i < vec_len (utm->connect_test_data); i++) utm->connect_test_data[i] = i & 0xff; test_data = utm->connect_test_data; session = pool_elt_at_index (utm->sessions, session_index); ASSERT (vec_len (test_data) > 0); utm->total_to_send = utm->bytes_to_send; vec_validate (utm->rx_buf, vec_len (test_data) - 1); start_time = clib_time_now (&utm->clib_time); while (!utm->time_to_stop && utm->bytes_to_send) { send_test_chunk (utm, session, 0); if (utm->have_return) recv_test_chunk (utm, session); if (utm->time_to_stop) break; } if (utm->have_return) { f64 timeout = clib_time_now (&utm->clib_time) + 5; while (clib_time_now (&utm->clib_time) < timeout) recv_test_chunk (utm, session); } end_time = clib_time_now (&utm->clib_time); delta = end_time - start_time; transfer_type = utm->have_return ? "full-duplex" : "half-duplex"; clib_warning ("%lld bytes (%lld mbytes, %lld gbytes) in %.2f seconds", utm->total_to_send, utm->total_to_send / (1ULL << 20), utm->total_to_send / (1ULL << 30), delta); clib_warning ("%.2f bytes/second %s", ((f64) utm->total_to_send) / (delta), transfer_type); clib_warning ("%.4f gbit/second %s", (((f64) utm->total_to_send * 8.0) / delta / 1e9), transfer_type); } static int application_attach (udp_echo_main_t * utm) { application_send_attach (utm); if (wait_for_state_change (utm, STATE_ATTACHED)) { clib_warning ("timeout waiting for STATE_ATTACHED"); return -1; } return 0; } static void client_test (udp_echo_main_t * utm) { f64 start_time, timeout = 100.0; app_session_t *session; svm_msg_q_msg_t msg; session_event_t *e; if (application_attach (utm)) return; udp_client_send_connect (utm); start_time = clib_time_now (&utm->clib_time); while (pool_elts (utm->sessions) != 1 && utm->state != STATE_FAILED) { svm_msg_q_sub (utm->our_event_queue, &msg, SVM_Q_WAIT, 0); e = svm_msg_q_msg_data (utm->our_event_queue, &msg); handle_mq_event (e); svm_msg_q_free_msg (utm->our_event_queue, &msg); if (clib_time_now (&utm->clib_time) - start_time >= timeout) break; } if (utm->cut_through_session_index != ~0) client_send_data (utm, utm->cut_through_session_index); else client_send_data (utm, utm->connected_session); application_detach (utm); wait_for_state_change (utm, STATE_DETACHED); } static void vl_api_bind_uri_reply_t_handler (vl_api_bind_uri_reply_t * mp) { udp_echo_main_t *utm = &udp_echo_main; svm_fifo_t *rx_fifo, *tx_fifo; app_session_t *session; u32 session_index; if (mp->retval) { clib_warning ("bind failed: %d", mp->retval); utm->state = STATE_FAILED; return; } rx_fifo = uword_to_pointer (mp->rx_fifo, svm_fifo_t *); tx_fifo = uword_to_pointer (mp->tx_fifo, svm_fifo_t *); pool_get (utm->sessions, session); clib_memset (session, 0, sizeof (*session)); session_index = session - utm->sessions; rx_fifo->client_session_index = session_index; tx_fifo->client_session_index = session_index; session->rx_fifo = rx_fifo; session->tx_fifo = tx_fifo; clib_memcpy_fast (&session->transport.lcl_ip, mp->lcl_ip, sizeof (ip46_address_t)); session->transport.is_ip4 = mp->lcl_is_ip4; session->transport.lcl_port = mp->lcl_port; session->vpp_evt_q = uword_to_pointer (mp->vpp_evt_q, svm_msg_q_t *); utm->state = utm->is_connected ? STATE_BOUND : STATE_READY; } static void vl_api_map_another_segment_t_handler (vl_api_map_another_segment_t * mp) { udp_echo_main_t *utm = &udp_echo_main; svm_fifo_segment_create_args_t _a, *a = &_a; svm_fifo_segment_private_t *seg; u8 *seg_name; int rv; clib_memset (a, 0, sizeof (*a)); a->segment_name = (char *) mp->segment_name; a->segment_size = mp->segment_size; /* Attach to the segment vpp created */ rv = svm_fifo_segment_attach (a); if (rv) { clib_warning ("svm_fifo_segment_attach ('%s') failed", mp->segment_name); return; } seg = svm_fifo_segment_get_segment (a->new_segment_indices[0]); clib_warning ("Mapped new segment '%s' size %d", seg->ssvm.name, seg->ssvm.ssvm_size); seg_name = format (0, "%s", (char *) mp->segment_name); hash_set_mem (utm->segments_table, seg_name, a->new_segment_indices[0]); vec_free (seg_name); } static void vl_api_unmap_segment_t_handler (vl_api_unmap_segment_t * mp) { udp_echo_main_t *utm = &udp_echo_main; svm_fifo_segment_private_t *seg; u64 *seg_indexp; u8 *seg_name; seg_name = format (0, "%s", mp->segment_name); seg_indexp = hash_get_mem (utm->segments_table, seg_name); if (!seg_indexp) { clib_warning ("segment not mapped: %s", seg_name); return; } hash_unset_mem (utm->segments_table, seg_name); seg = svm_fifo_segment_get_segment ((u32) seg_indexp[0]); svm_fifo_segment_delete (seg); clib_warning ("Unmapped segment '%s'", seg_name); vec_free (seg_name); } static void vl_api_unbind_uri_reply_t_handler (vl_api_unbind_uri_reply_t * mp) { udp_echo_main_t *utm = &udp_echo_main; if (mp->retval != 0) clib_warning ("returned %d", ntohl (mp->retval)); utm->state = STATE_START; } static void vl_api_app_cut_through_registration_add_t_handler (vl_api_app_cut_through_registration_add_t * mp) { } #define foreach_tcp_echo_msg \ _(BIND_URI_REPLY, bind_uri_reply) \ _(UNBIND_URI_REPLY, unbind_uri_reply) \ _(MAP_ANOTHER_SEGMENT, map_another_segment) \ _(UNMAP_SEGMENT, unmap_segment) \ _(APPLICATION_ATTACH_REPLY, application_attach_reply) \ _(APPLICATION_DETACH_REPLY, application_detach_reply) \ _(APP_CUT_THROUGH_REGISTRATION_ADD, app_cut_through_registration_add) \ void tcp_echo_api_hookup (udp_echo_main_t * utm) { #define _(N,n) \ vl_msg_api_set_handlers(VL_API_##N, #n, \ vl_api_##n##_t_handler, \ vl_noop_handler, \ vl_api_##n##_t_endian, \ vl_api_##n##_t_print, \ sizeof(vl_api_##n##_t), 1); foreach_tcp_echo_msg; #undef _ } int connect_to_vpp (char *name) { udp_echo_main_t *utm = &udp_echo_main; api_main_t *am = &api_main; if (vl_client_connect_to_vlib ("/vpe-api", name, 32) < 0) return -1; utm->vl_input_queue = am->shmem_hdr->vl_input_queue; utm->my_client_index = am->my_client_index; return 0; } void vlib_cli_output (struct vlib_main_t *vm, char *fmt, ...) { clib_warning ("BUG"); } static void init_error_string_table (udp_echo_main_t * utm) { utm->error_string_by_error_number = hash_create (0, sizeof (uword)); #define _(n,v,s) hash_set (utm->error_string_by_error_number, -v, s); foreach_vnet_api_error; #undef _ hash_set (utm->error_string_by_error_number, 99, "Misc"); } void server_handle_fifo_event_rx (udp_echo_main_t * utm, u32 session_index) { svm_fifo_t *rx_fifo, *tx_fifo; int n_read; app_session_t *session; int rv; u32 max_dequeue, offset, max_transfer, rx_buf_len; session_evt_type_t et = FIFO_EVENT_APP_TX; session = pool_elt_at_index (utm->sessions, session_index); rx_buf_len = vec_len (utm->rx_buf); rx_fifo = session->rx_fifo; tx_fifo = session->tx_fifo; et += (session->session_index == utm->cut_through_session_index); max_dequeue = svm_fifo_max_dequeue (rx_fifo); /* Allow enqueuing of a new event */ svm_fifo_unset_event (rx_fifo); if (PREDICT_FALSE (!max_dequeue)) return; /* Read the max_dequeue */ do { max_transfer = clib_min (rx_buf_len, max_dequeue); if (session->is_dgram) n_read = app_recv_dgram_raw (rx_fifo, utm->rx_buf, max_transfer, &session->transport, 0, 0); else n_read = app_recv_stream_raw (rx_fifo, utm->rx_buf, max_transfer, 0, 0); if (n_read > 0) max_dequeue -= n_read; /* Reflect if a non-drop session */ if (utm->have_return && n_read > 0) { offset = 0; do { if (session->is_dgram) rv = app_send_dgram_raw (tx_fifo, &session->transport, session->vpp_evt_q, &utm->rx_buf[offset], n_read, et, SVM_Q_WAIT); else rv = app_send_stream_raw (tx_fifo, session->vpp_evt_q, &utm->rx_buf[offset], n_read, et, SVM_Q_WAIT); if (rv > 0) { n_read -= rv; offset += rv; } } while ((rv <= 0 || n_read > 0) && !utm->time_to_stop); /* If event wasn't set, add one */ if (svm_fifo_set_event (tx_fifo)) app_send_io_evt_to_vpp (session->vpp_evt_q, tx_fifo, et, SVM_Q_WAIT); } } while ((n_read < 0 || max_dequeue > 0) && !utm->time_to_stop); } static void server_handle_event_queue (udp_echo_main_t * utm) { session_event_t *e; svm_msg_q_msg_t msg; svm_msg_q_t *mq = utm->our_event_queue; int i; while (utm->state != STATE_READY) sleep (5); while (1) { if (svm_msg_q_sub (mq, &msg, SVM_Q_WAIT, 0)) { clib_warning ("svm msg q returned"); continue; } e = svm_msg_q_msg_data (mq, &msg); switch (e->event_type) { case FIFO_EVENT_APP_RX: server_handle_fifo_event_rx (utm, e->fifo->client_session_index); break; case SESSION_IO_EVT_CT_TX: break; default: handle_mq_event (e); break; } svm_msg_q_free_msg (mq, &msg); if (PREDICT_FALSE (utm->time_to_stop == 1)) return; if (PREDICT_FALSE (utm->time_to_print_stats == 1)) { utm->time_to_print_stats = 0; fformat (stdout, "%d connections\n", pool_elts (utm->sessions)); } } } static void server_unbind (udp_echo_main_t * utm) { vl_api_unbind_uri_t *ump; ump = vl_msg_api_alloc (sizeof (*ump)); clib_memset (ump, 0, sizeof (*ump)); ump->_vl_msg_id = ntohs (VL_API_UNBIND_URI); ump->client_index = utm->my_client_index; memcpy (ump->uri, utm->listen_uri, vec_len (utm->listen_uri)); vl_msg_api_send_shmem (utm->vl_input_queue, (u8 *) & ump); } static void server_bind (udp_echo_main_t * utm) { vl_api_bind_uri_t *bmp; bmp = vl_msg_api_alloc (sizeof (*bmp)); clib_memset (bmp, 0, sizeof (*bmp)); bmp->_vl_msg_id = ntohs (VL_API_BIND_URI); bmp->client_index = utm->my_client_index; bmp->context = ntohl (0xfeedface); memcpy (bmp->uri, utm->listen_uri, vec_len (utm->listen_uri)); vl_msg_api_send_shmem (utm->vl_input_queue, (u8 *) & bmp); } void udp_server_test (udp_echo_main_t * utm) { u8 wait_for_state = utm->is_connected ? STATE_BOUND : STATE_READY; application_send_attach (utm); /* Bind to uri */ server_bind (utm); if (wait_for_state_change (utm, wait_for_state)) { clib_warning ("timeout waiting for state change"); return; } server_handle_event_queue (utm); /* Cleanup */ server_unbind (utm); if (wait_for_state_change (utm, STATE_START)) { clib_warning ("timeout waiting for STATE_START"); return; } application_detach (utm); fformat (stdout, "Test complete...\n"); } int main (int argc, char **argv) { udp_echo_main_t *utm = &udp_echo_main; u8 *uri = (u8 *) "udp://6.0.1.1/1234"; unformat_input_t _argv, *a = &_argv; int i_am_server = 1; app_session_t *session; u8 *chroot_prefix; char *app_name; u32 tmp; int i; clib_mem_init_thread_safe (0, 256 << 20); svm_fifo_segment_main_init (0x200000000ULL, 20); vec_validate (utm->rx_buf, 128 << 10); utm->session_index_by_vpp_handles = hash_create (0, sizeof (uword)); utm->my_pid = getpid (); utm->configured_segment_size = 1 << 20; utm->segments_table = hash_create_vec (0, sizeof (u8), sizeof (u64)); utm->have_return = 1; utm->bytes_to_send = 1024; utm->fifo_size = 128 << 10; utm->segment_main = &svm_fifo_segment_main; utm->cut_through_session_index = ~0; clib_time_init (&utm->clib_time); init_error_string_table (utm); unformat_init_command_line (a, argv); while (unformat_check_input (a) != UNFORMAT_END_OF_INPUT) { if (unformat (a, "chroot prefix %s", &chroot_prefix)) { vl_set_memory_root_path ((char *) chroot_prefix); } else if (unformat (a, "uri %s", &uri)) ; else if (unformat (a, "segment-size %dM", &tmp)) utm->configured_segment_size = tmp << 20; else if (unformat (a, "segment-size %dG", &tmp)) utm->configured_segment_size = tmp << 30; else if (unformat (a, "server")) i_am_server = 1; else if (unformat (a, "client")) i_am_server = 0; else if (unformat (a, "no-return")) utm->have_return = 0; else if (unformat (a, "mbytes %d", &tmp)) utm->bytes_to_send = (u64) tmp << 20; else if (unformat (a, "fifo-size %d", &tmp)) utm->fifo_size = tmp << 10; else { fformat (stderr, "%s: usage [server|client]\n"); exit (1); } } utm->i_am_server = i_am_server; setup_signal_handlers (); tcp_echo_api_hookup (utm); if (i_am_server) { utm->listen_uri = format (0, "%s%c", uri, 0); utm->is_connected = (utm->listen_uri[4] == 'c'); app_name = "udp_echo_server"; } else { app_name = "udp_echo_client"; utm->connect_uri = format (0, "%s%c", uri, 0); utm->is_connected = (utm->connect_uri[4] == 'c'); } if (connect_to_vpp (app_name) < 0) { svm_region_exit (); fformat (stderr, "Couldn't connect to vpe, exiting...\n"); exit (1); } if (i_am_server == 0) { client_test (utm); goto done; } /* $$$$ hack preallocation */ for (i = 0; i < 200000; i++) { pool_get (utm->sessions, session); clib_memset (session, 0, sizeof (*session)); } for (i = 0; i < 200000; i++) pool_put_index (utm->sessions, i); udp_server_test (utm); done: vl_client_disconnect_from_vlib (); exit (0); } #undef vl_api_version #define vl_api_version(n,v) static u32 vpe_api_version = v; #include #undef vl_api_version void vl_client_add_api_signatures (vl_api_memclnt_create_t * mp) { /* * Send the main API signature in slot 0. This bit of code must * match the checks in ../vpe/api/api.c: vl_msg_api_version_check(). */ mp->api_versions[0] = clib_host_to_net_u32 (vpe_api_version); } u32 vl (void *p) { return vec_len (p); } /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */