/* * 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 #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 struct { svm_fifo_t *server_rx_fifo; svm_fifo_t *server_tx_fifo; u64 vpp_session_handle; u64 bytes_received; f64 start; } session_t; typedef enum { STATE_START, STATE_ATTACHED, STATE_READY, STATE_DISCONNECTING, STATE_FAILED } 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 *uri; /* Session pool */ session_t *sessions; /* Hash table for disconnect processing */ uword *session_index_by_vpp_handles; /* intermediate rx buffer */ u8 *rx_buf; /* URI for slave's connect */ u8 *connect_uri; u32 connected_session_index; int i_am_master; /* drop all packets */ int drop_packets; /* Our event queue */ svm_queue_t *our_event_queue; /* $$$ single thread only for the moment */ svm_queue_t *vpp_event_queue; u8 *socket_name; pid_t my_pid; /* 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; /* Signal variables */ 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; u8 *connect_test_data; pthread_t client_rx_thread_handle; u32 client_bytes_received; u8 test_return_packets; u64 bytes_to_send; /** Flag that decides if socket, instead of svm, api is used to connect to * vpp. If sock api is used, shm binary api is subsequently bootstrapped * and all other messages are exchanged using shm IPC. */ u8 use_sock_api; /* convenience */ svm_fifo_segment_main_t *segment_main; } echo_main_t; echo_main_t echo_main; #if CLIB_DEBUG > 0 #define NITER 10000 #else #define NITER 4000000 #endif static u8 * format_api_error (u8 * s, va_list * args) { echo_main_t *em = &echo_main; i32 error = va_arg (*args, u32); uword *p; p = hash_get (em->error_string_by_error_number, -error); if (p) s = format (s, "%s", p[0]); else s = format (s, "%d", error); return s; } static void init_error_string_table (echo_main_t * em) { em->error_string_by_error_number = hash_create (0, sizeof (uword)); #define _(n,v,s) hash_set (em->error_string_by_error_number, -v, s); foreach_vnet_api_error; #undef _ hash_set (em->error_string_by_error_number, 99, "Misc"); } int wait_for_state_change (echo_main_t * em, connection_state_t state) { #if CLIB_DEBUG > 0 #define TIMEOUT 600.0 #else #define TIMEOUT 600.0 #endif f64 timeout = clib_time_now (&em->clib_time) + TIMEOUT; while (clib_time_now (&em->clib_time) < timeout) { if (em->state == state) return 0; if (em->state == STATE_FAILED) return -1; if (em->time_to_stop == 1) return 0; } clib_warning ("timeout waiting for STATE_READY"); return -1; } void application_send_attach (echo_main_t * em) { vl_api_application_attach_t *bmp; u32 fifo_size = 4 << 20; bmp = vl_msg_api_alloc (sizeof (*bmp)); memset (bmp, 0, sizeof (*bmp)); bmp->_vl_msg_id = ntohs (VL_API_APPLICATION_ATTACH); bmp->client_index = em->my_client_index; bmp->context = ntohl (0xfeedface); bmp->options[APP_OPTIONS_FLAGS] = APP_OPTIONS_FLAGS_ACCEPT_REDIRECT | APP_OPTIONS_FLAGS_ADD_SEGMENT; bmp->options[APP_OPTIONS_PREALLOC_FIFO_PAIRS] = 16; bmp->options[APP_OPTIONS_RX_FIFO_SIZE] = fifo_size; bmp->options[APP_OPTIONS_TX_FIFO_SIZE] = fifo_size; bmp->options[APP_OPTIONS_ADD_SEGMENT_SIZE] = 128 << 20; bmp->options[APP_OPTIONS_SEGMENT_SIZE] = 256 << 20; vl_msg_api_send_shmem (em->vl_input_queue, (u8 *) & bmp); } int application_attach (echo_main_t * em) { application_send_attach (em); if (wait_for_state_change (em, STATE_ATTACHED)) { clib_warning ("timeout waiting for STATE_ATTACHED"); return -1; } return 0; } void application_detach (echo_main_t * em) { vl_api_application_detach_t *bmp; bmp = vl_msg_api_alloc (sizeof (*bmp)); memset (bmp, 0, sizeof (*bmp)); bmp->_vl_msg_id = ntohs (VL_API_APPLICATION_DETACH); bmp->client_index = em->my_client_index; bmp->context = ntohl (0xfeedface); vl_msg_api_send_shmem (em->vl_input_queue, (u8 *) & bmp); clib_warning ("Sent detach"); } static int memfd_segment_attach (void) { ssvm_private_t _ssvm = { 0 }, *ssvm = &_ssvm; clib_error_t *error; int rv; if ((error = vl_socket_client_recv_fd_msg (&ssvm->fd, 5))) { clib_error_report (error); return -1; } if ((rv = ssvm_slave_init_memfd (ssvm))) return rv; return 0; } static int fifo_segment_attach (char *name, u32 size, ssvm_segment_type_t type) { svm_fifo_segment_create_args_t _a, *a = &_a; clib_error_t *error; int rv; memset (a, 0, sizeof (*a)); a->segment_name = (char *) name; a->segment_size = size; a->segment_type = type; if (type == SSVM_SEGMENT_MEMFD) { if ((error = vl_socket_client_recv_fd_msg (&a->memfd_fd, 5))) { clib_error_report (error); return -1; } } if ((rv = svm_fifo_segment_attach (a))) { clib_warning ("svm_fifo_segment_attach ('%s') failed", name); return rv; } return 0; } static void vl_api_application_attach_reply_t_handler (vl_api_application_attach_reply_t * mp) { echo_main_t *em = &echo_main; ssvm_segment_type_t seg_type; if (mp->retval) { clib_warning ("attach failed: %U", format_api_error, clib_net_to_host_u32 (mp->retval)); em->state = STATE_FAILED; return; } if (mp->segment_name_length == 0) { clib_warning ("segment_name_length zero"); return; } seg_type = em->use_sock_api ? SSVM_SEGMENT_MEMFD : SSVM_SEGMENT_SHM; /* Attach to fifo segment */ if (fifo_segment_attach ((char *) mp->segment_name, mp->segment_size, seg_type)) { em->state = STATE_FAILED; return; } /* If we're using memfd segments, read and attach to event qs segment */ if (seg_type == SSVM_SEGMENT_MEMFD) { if (memfd_segment_attach ()) { clib_warning ("failed to attach to evt q segment"); em->state = STATE_FAILED; return; } } ASSERT (mp->app_event_queue_address); em->our_event_queue = uword_to_pointer (mp->app_event_queue_address, svm_queue_t *); em->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); } static void stop_signal (int signum) { echo_main_t *um = &echo_main; um->time_to_stop = 1; } static void stats_signal (int signum) { echo_main_t *um = &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; } void vlib_cli_output (struct vlib_main_t *vm, char *fmt, ...) { clib_warning ("BUG"); } int connect_to_vpp (char *name) { echo_main_t *em = &echo_main; api_main_t *am = &api_main; if (em->use_sock_api) { if (vl_socket_client_connect ((char *) em->socket_name, name, 0 /* default rx, tx buffer */ )) { clib_warning ("socket connect failed"); return -1; } if (vl_socket_client_init_shm (0)) { clib_warning ("init shm api failed"); return -1; } } else { if (vl_client_connect_to_vlib ("/vpe-api", name, 32) < 0) { clib_warning ("shmem connect failed"); return -1; } } em->vl_input_queue = am->shmem_hdr->vl_input_queue; em->my_client_index = am->my_client_index; return 0; } void disconnect_from_vpp (echo_main_t * em) { if (em->use_sock_api) vl_socket_client_disconnect (); else vl_client_disconnect_from_vlib (); } static void vl_api_map_another_segment_t_handler (vl_api_map_another_segment_t * mp) { svm_fifo_segment_create_args_t _a, *a = &_a; int rv; 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; } clib_warning ("Mapped new segment '%s' size %d", mp->segment_name, mp->segment_size); } static void session_print_stats (echo_main_t * em, session_t * session) { f64 deltat; u64 bytes; deltat = clib_time_now (&em->clib_time) - session->start; bytes = em->i_am_master ? session->bytes_received : em->bytes_to_send; fformat (stdout, "Finished in %.6f\n", deltat); fformat (stdout, "%.4f Gbit/second\n", (bytes * 8.0) / deltat / 1e9); } static void vl_api_disconnect_session_t_handler (vl_api_disconnect_session_t * mp) { echo_main_t *em = &echo_main; session_t *session = 0; vl_api_disconnect_session_reply_t *rmp; uword *p; int rv = 0; p = hash_get (em->session_index_by_vpp_handles, mp->handle); if (p) { session = pool_elt_at_index (em->sessions, p[0]); hash_unset (em->session_index_by_vpp_handles, mp->handle); pool_put (em->sessions, session); } else { clib_warning ("couldn't find session key %llx", mp->handle); rv = -11; } // em->time_to_stop = 1; rmp = vl_msg_api_alloc (sizeof (*rmp)); memset (rmp, 0, sizeof (*rmp)); rmp->_vl_msg_id = ntohs (VL_API_DISCONNECT_SESSION_REPLY); rmp->retval = rv; rmp->handle = mp->handle; rmp->context = mp->context; vl_msg_api_send_shmem (em->vl_input_queue, (u8 *) & rmp); if (session) session_print_stats (em, session); } static void vl_api_reset_session_t_handler (vl_api_reset_session_t * mp) { echo_main_t *em = &echo_main; vl_api_reset_session_reply_t *rmp; uword *p; int rv = 0; p = hash_get (em->session_index_by_vpp_handles, mp->handle); if (p) { clib_warning ("got reset"); /* Cleanup later */ em->time_to_stop = 1; } else { clib_warning ("couldn't find session key %llx", mp->handle); rv = -11; } rmp = vl_msg_api_alloc (sizeof (*rmp)); memset (rmp, 0, sizeof (*rmp)); rmp->_vl_msg_id = ntohs (VL_API_RESET_SESSION_REPLY); rmp->retval = rv; rmp->handle = mp->handle; vl_msg_api_send_shmem (em->vl_input_queue, (u8 *) & rmp); } void client_handle_fifo_event_rx (echo_main_t * em, session_fifo_event_t * e) { svm_fifo_t *rx_fifo; int n_read, bytes, i; rx_fifo = e->fifo; bytes = svm_fifo_max_dequeue (rx_fifo); /* Allow enqueuing of new event */ svm_fifo_unset_event (rx_fifo); /* Read the bytes */ do { n_read = svm_fifo_dequeue_nowait (rx_fifo, clib_min (vec_len (em->rx_buf), bytes), em->rx_buf); if (n_read > 0) { bytes -= n_read; if (em->test_return_packets) { for (i = 0; i < n_read; i++) { if (em->rx_buf[i] != ((em->client_bytes_received + i) & 0xff)) { clib_warning ("error at byte %lld, 0x%x not 0x%x", em->client_bytes_received + i, em->rx_buf[i], ((em->client_bytes_received + i) & 0xff)); } } } em->client_bytes_received += n_read; } else { if (n_read == -2) { // clib_warning ("weird!"); break; } } } while (bytes > 0); } void client_handle_event_queue (echo_main_t * em) { session_fifo_event_t _e, *e = &_e;; svm_queue_sub (em->our_event_queue, (u8 *) e, SVM_Q_WAIT, 0); switch (e->event_type) { case FIFO_EVENT_APP_RX: client_handle_fifo_event_rx (em, e); break; case FIFO_EVENT_DISCONNECT: return; default: clib_warning ("unknown event type %d", e->event_type); break; } } static void * client_rx_thread_fn (void *arg) { session_fifo_event_t _e, *e = &_e; echo_main_t *em = &echo_main; em->client_bytes_received = 0; while (1) { svm_queue_sub (em->our_event_queue, (u8 *) e, SVM_Q_WAIT, 0); switch (e->event_type) { case FIFO_EVENT_APP_RX: client_handle_fifo_event_rx (em, e); break; case FIFO_EVENT_DISCONNECT: return 0; default: clib_warning ("unknown event type %d", e->event_type); break; } if (PREDICT_FALSE (em->time_to_stop == 1)) break; } pthread_exit (0); } static void vl_api_connect_session_reply_t_handler (vl_api_connect_session_reply_t * mp) { echo_main_t *em = &echo_main; session_t *session; u32 session_index; svm_fifo_t *rx_fifo, *tx_fifo; int rv; if (mp->retval) { clib_warning ("connection failed with code: %U", format_api_error, clib_net_to_host_u32 (mp->retval)); em->state = STATE_FAILED; return; } else { clib_warning ("connected with local ip %U port %d", format_ip46_address, mp->lcl_ip, mp->is_ip4, clib_net_to_host_u16 (mp->lcl_port)); } em->vpp_event_queue = uword_to_pointer (mp->vpp_event_queue_address, svm_queue_t *); /* * Setup session */ pool_get (em->sessions, session); session_index = session - em->sessions; rx_fifo = uword_to_pointer (mp->server_rx_fifo, svm_fifo_t *); rx_fifo->client_session_index = session_index; tx_fifo = uword_to_pointer (mp->server_tx_fifo, svm_fifo_t *); tx_fifo->client_session_index = session_index; session->server_rx_fifo = rx_fifo; session->server_tx_fifo = tx_fifo; session->vpp_session_handle = mp->handle; session->start = clib_time_now (&em->clib_time); /* Save handle */ em->connected_session_index = session_index; em->state = STATE_READY; /* Add it to lookup table */ hash_set (em->session_index_by_vpp_handles, mp->handle, session_index); /* Start RX thread */ rv = pthread_create (&em->client_rx_thread_handle, NULL /*attr */ , client_rx_thread_fn, 0); if (rv) { clib_warning ("pthread_create returned %d", rv); rv = VNET_API_ERROR_SYSCALL_ERROR_1; } } static void send_test_chunk (echo_main_t * em, svm_fifo_t * tx_fifo, int mypid, u32 bytes) { u8 *test_data = em->connect_test_data; u64 bytes_sent = 0; int test_buf_offset = 0; u32 bytes_to_snd; u32 queue_max_chunk = 128 << 10, actual_write; session_fifo_event_t evt; int rv; bytes_to_snd = (bytes == 0) ? vec_len (test_data) : bytes; if (bytes_to_snd > vec_len (test_data)) bytes_to_snd = vec_len (test_data); while (bytes_to_snd > 0 && !em->time_to_stop) { actual_write = (bytes_to_snd > queue_max_chunk) ? queue_max_chunk : bytes_to_snd; rv = svm_fifo_enqueue_nowait (tx_fifo, actual_write, test_data + test_buf_offset); if (rv > 0) { bytes_to_snd -= rv; test_buf_offset += rv; bytes_sent += rv; if (svm_fifo_set_event (tx_fifo)) { /* Fabricate TX event, send to vpp */ evt.fifo = tx_fifo; evt.event_type = FIFO_EVENT_APP_TX; svm_queue_add (em->vpp_event_queue, (u8 *) & evt, 0 /* do wait for mutex */ ); } } } } void client_send_data (echo_main_t * em) { u8 *test_data = em->connect_test_data; int mypid = getpid (); session_t *session; svm_fifo_t *tx_fifo; u32 n_iterations, leftover; int i; session = pool_elt_at_index (em->sessions, em->connected_session_index); tx_fifo = session->server_tx_fifo; ASSERT (vec_len (test_data) > 0); vec_validate (em->rx_buf, vec_len (test_data) - 1); n_iterations = em->bytes_to_send / vec_len (test_data); for (i = 0; i < n_iterations; i++) { send_test_chunk (em, tx_fifo, mypid, 0); if (em->time_to_stop) break; } leftover = em->bytes_to_send % vec_len (test_data); if (leftover) send_test_chunk (em, tx_fifo, mypid, leftover); if (!em->drop_packets) { f64 timeout = clib_time_now (&em->clib_time) + 10; /* Wait for the outstanding packets */ while (em->client_bytes_received < vec_len (test_data) * n_iterations + leftover) { if (clib_time_now (&em->clib_time) > timeout) { clib_warning ("timed out waiting for the missing packets"); break; } } } em->time_to_stop = 1; } void client_send_connect (echo_main_t * em) { vl_api_connect_uri_t *cmp; cmp = vl_msg_api_alloc (sizeof (*cmp)); memset (cmp, 0, sizeof (*cmp)); cmp->_vl_msg_id = ntohs (VL_API_CONNECT_URI); cmp->client_index = em->my_client_index; cmp->context = ntohl (0xfeedface); memcpy (cmp->uri, em->connect_uri, vec_len (em->connect_uri)); vl_msg_api_send_shmem (em->vl_input_queue, (u8 *) & cmp); } int client_connect (echo_main_t * em) { client_send_connect (em); if (wait_for_state_change (em, STATE_READY)) { clib_warning ("Connect failed"); return -1; } return 0; } void client_send_disconnect (echo_main_t * em) { session_t *connected_session; vl_api_disconnect_session_t *dmp; connected_session = pool_elt_at_index (em->sessions, em->connected_session_index); dmp = vl_msg_api_alloc (sizeof (*dmp)); memset (dmp, 0, sizeof (*dmp)); dmp->_vl_msg_id = ntohs (VL_API_DISCONNECT_SESSION); dmp->client_index = em->my_client_index; dmp->handle = connected_session->vpp_session_handle; vl_msg_api_send_shmem (em->vl_input_queue, (u8 *) & dmp); } int client_disconnect (echo_main_t * em) { client_send_disconnect (em); clib_warning ("Sent disconnect"); if (wait_for_state_change (em, STATE_START)) { clib_warning ("Disconnect failed"); return -1; } return 0; } static void client_run (echo_main_t * em) { int i; if (application_attach (em)) return; if (client_connect (em)) { application_detach (em); return; } /* Init test data */ vec_validate (em->connect_test_data, 128 * 1024 - 1); for (i = 0; i < vec_len (em->connect_test_data); i++) em->connect_test_data[i] = i & 0xff; /* Start send */ client_send_data (em); /* Disconnect and detach */ client_disconnect (em); application_detach (em); } static void vl_api_bind_uri_reply_t_handler (vl_api_bind_uri_reply_t * mp) { echo_main_t *em = &echo_main; if (mp->retval) { clib_warning ("bind failed: %U", format_api_error, clib_net_to_host_u32 (mp->retval)); em->state = STATE_FAILED; return; } em->state = STATE_READY; } static void vl_api_unbind_uri_reply_t_handler (vl_api_unbind_uri_reply_t * mp) { echo_main_t *em = &echo_main; if (mp->retval != 0) clib_warning ("returned %d", ntohl (mp->retval)); em->state = STATE_START; } u8 * format_ip4_address (u8 * s, va_list * args) { u8 *a = va_arg (*args, u8 *); return format (s, "%d.%d.%d.%d", a[0], a[1], a[2], a[3]); } u8 * format_ip6_address (u8 * s, va_list * args) { ip6_address_t *a = va_arg (*args, ip6_address_t *); u32 i, i_max_n_zero, max_n_zeros, i_first_zero, n_zeros, last_double_colon; i_max_n_zero = ARRAY_LEN (a->as_u16); max_n_zeros = 0; i_first_zero = i_max_n_zero; n_zeros = 0; for (i = 0; i < ARRAY_LEN (a->as_u16); i++) { u32 is_zero = a->as_u16[i] == 0; if (is_zero && i_first_zero >= ARRAY_LEN (a->as_u16)) { i_first_zero = i; n_zeros = 0; } n_zeros += is_zero; if ((!is_zero && n_zeros > max_n_zeros) || (i + 1 >= ARRAY_LEN (a->as_u16) && n_zeros > max_n_zeros)) { i_max_n_zero = i_first_zero; max_n_zeros = n_zeros; i_first_zero = ARRAY_LEN (a->as_u16); n_zeros = 0; } } last_double_colon = 0; for (i = 0; i < ARRAY_LEN (a->as_u16); i++) { if (i == i_max_n_zero && max_n_zeros > 1) { s = format (s, "::"); i += max_n_zeros - 1; last_double_colon = 1; } else { s = format (s, "%s%x", (last_double_colon || i == 0) ? "" : ":", clib_net_to_host_u16 (a->as_u16[i])); last_double_colon = 0; } } return s; } /* Format an IP46 address. */ u8 * format_ip46_address (u8 * s, va_list * args) { ip46_address_t *ip46 = va_arg (*args, ip46_address_t *); ip46_type_t type = va_arg (*args, ip46_type_t); int is_ip4 = 1; switch (type) { case IP46_TYPE_ANY: is_ip4 = ip46_address_is_ip4 (ip46); break; case IP46_TYPE_IP4: is_ip4 = 1; break; case IP46_TYPE_IP6: is_ip4 = 0; break; } return is_ip4 ? format (s, "%U", format_ip4_address, &ip46->ip4) : format (s, "%U", format_ip6_address, &ip46->ip6); } static void vl_api_accept_session_t_handler (vl_api_accept_session_t * mp) { echo_main_t *em = &echo_main; vl_api_accept_session_reply_t *rmp; svm_fifo_t *rx_fifo, *tx_fifo; session_t *session; static f64 start_time; u32 session_index; u8 *ip_str; if (start_time == 0.0) start_time = clib_time_now (&em->clib_time); ip_str = format (0, "%U", format_ip46_address, &mp->ip, mp->is_ip4); clib_warning ("Accepted session from: %s:%d", ip_str, clib_net_to_host_u16 (mp->port)); em->vpp_event_queue = uword_to_pointer (mp->vpp_event_queue_address, svm_queue_t *); /* Allocate local session and set it up */ pool_get (em->sessions, session); session_index = session - em->sessions; rx_fifo = uword_to_pointer (mp->server_rx_fifo, svm_fifo_t *); rx_fifo->client_session_index = session_index; tx_fifo = uword_to_pointer (mp->server_tx_fifo, svm_fifo_t *); tx_fifo->client_session_index = session_index; session->server_rx_fifo = rx_fifo; session->server_tx_fifo = tx_fifo; /* Add it to lookup table */ hash_set (em->session_index_by_vpp_handles, mp->handle, session_index); em->state = STATE_READY; /* Stats printing */ if (pool_elts (em->sessions) && (pool_elts (em->sessions) % 20000) == 0) { f64 now = clib_time_now (&em->clib_time); fformat (stdout, "%d active sessions in %.2f seconds, %.2f/sec...\n", pool_elts (em->sessions), now - start_time, (f64) pool_elts (em->sessions) / (now - start_time)); } /* * Send accept reply to vpp */ rmp = vl_msg_api_alloc (sizeof (*rmp)); memset (rmp, 0, sizeof (*rmp)); rmp->_vl_msg_id = ntohs (VL_API_ACCEPT_SESSION_REPLY); rmp->handle = mp->handle; rmp->context = mp->context; vl_msg_api_send_shmem (em->vl_input_queue, (u8 *) & rmp); session->bytes_received = 0; session->start = clib_time_now (&em->clib_time); } void server_handle_fifo_event_rx (echo_main_t * em, session_fifo_event_t * e) { svm_fifo_t *rx_fifo, *tx_fifo; int n_read; session_fifo_event_t evt; svm_queue_t *q; session_t *session; int rv; u32 max_dequeue, offset, max_transfer, rx_buf_len; rx_buf_len = vec_len (em->rx_buf); rx_fifo = e->fifo; session = &em->sessions[rx_fifo->client_session_index]; tx_fifo = session->server_tx_fifo; 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 == 0)) { return; } /* Read the max_dequeue */ do { max_transfer = clib_min (rx_buf_len, max_dequeue); n_read = svm_fifo_dequeue_nowait (rx_fifo, max_transfer, em->rx_buf); if (n_read > 0) { max_dequeue -= n_read; session->bytes_received += n_read; } /* Reflect if a non-drop session */ if (!em->drop_packets && n_read > 0) { offset = 0; do { rv = svm_fifo_enqueue_nowait (tx_fifo, n_read, &em->rx_buf[offset]); if (rv > 0) { n_read -= rv; offset += rv; } } while ((rv <= 0 || n_read > 0) && !em->time_to_stop); /* If event wasn't set, add one */ if (svm_fifo_set_event (tx_fifo)) { /* Fabricate TX event, send to vpp */ evt.fifo = tx_fifo; evt.event_type = FIFO_EVENT_APP_TX; q = em->vpp_event_queue; svm_queue_add (q, (u8 *) & evt, 1 /* do wait for mutex */ ); } } } while ((n_read < 0 || max_dequeue > 0) && !em->time_to_stop); } void server_handle_event_queue (echo_main_t * em) { session_fifo_event_t _e, *e = &_e; while (1) { svm_queue_sub (em->our_event_queue, (u8 *) e, SVM_Q_WAIT, 0); switch (e->event_type) { case FIFO_EVENT_APP_RX: server_handle_fifo_event_rx (em, e); break; case FIFO_EVENT_DISCONNECT: return; default: clib_warning ("unknown event type %d", e->event_type); break; } if (PREDICT_FALSE (em->time_to_stop == 1)) break; if (PREDICT_FALSE (em->time_to_print_stats == 1)) { em->time_to_print_stats = 0; fformat (stdout, "%d connections\n", pool_elts (em->sessions)); } } } void server_send_listen (echo_main_t * em) { vl_api_bind_uri_t *bmp; bmp = vl_msg_api_alloc (sizeof (*bmp)); memset (bmp, 0, sizeof (*bmp)); bmp->_vl_msg_id = ntohs (VL_API_BIND_URI); bmp->client_index = em->my_client_index; bmp->context = ntohl (0xfeedface); memcpy (bmp->uri, em->uri, vec_len (em->uri)); vl_msg_api_send_shmem (em->vl_input_queue, (u8 *) & bmp); } int server_listen (echo_main_t * em) { server_send_listen (em); if (wait_for_state_change (em, STATE_READY)) { clib_warning ("timeout waiting for STATE_READY"); return -1; } return 0; } void server_send_unbind (echo_main_t * em) { vl_api_unbind_uri_t *ump; ump = vl_msg_api_alloc (sizeof (*ump)); memset (ump, 0, sizeof (*ump)); ump->_vl_msg_id = ntohs (VL_API_UNBIND_URI); ump->client_index = em->my_client_index; memcpy (ump->uri, em->uri, vec_len (em->uri)); vl_msg_api_send_shmem (em->vl_input_queue, (u8 *) & ump); } int server_unbind (echo_main_t * em) { server_send_unbind (em); if (wait_for_state_change (em, STATE_START)) { clib_warning ("timeout waiting for STATE_START"); return -1; } return 0; } void server_run (echo_main_t * em) { session_t *session; int i; /* $$$$ hack preallocation */ for (i = 0; i < 200000; i++) { pool_get (em->sessions, session); memset (session, 0, sizeof (*session)); } for (i = 0; i < 200000; i++) pool_put_index (em->sessions, i); if (application_attach (em)) return; /* Bind to uri */ if (server_listen (em)) return; /* Enter handle event loop */ server_handle_event_queue (em); /* Cleanup */ server_send_unbind (em); application_detach (em); fformat (stdout, "Test complete...\n"); } static void vl_api_disconnect_session_reply_t_handler (vl_api_disconnect_session_reply_t * mp) { echo_main_t *em = &echo_main; session_t *session; if (mp->retval) { clib_warning ("vpp complained about disconnect: %d", ntohl (mp->retval)); } em->state = STATE_START; session = pool_elt_at_index (em->sessions, em->connected_session_index); if (session) session_print_stats (em, session); } #define foreach_tcp_echo_msg \ _(BIND_URI_REPLY, bind_uri_reply) \ _(UNBIND_URI_REPLY, unbind_uri_reply) \ _(ACCEPT_SESSION, accept_session) \ _(CONNECT_SESSION_REPLY, connect_session_reply) \ _(DISCONNECT_SESSION, disconnect_session) \ _(DISCONNECT_SESSION_REPLY, disconnect_session_reply) \ _(RESET_SESSION, reset_session) \ _(APPLICATION_ATTACH_REPLY, application_attach_reply) \ _(APPLICATION_DETACH_REPLY, application_detach_reply) \ _(MAP_ANOTHER_SEGMENT, map_another_segment) \ void tcp_echo_api_hookup (echo_main_t * em) { #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 main (int argc, char **argv) { int i_am_master = 1, drop_packets = 0, test_return_packets = 0; echo_main_t *em = &echo_main; unformat_input_t _argv, *a = &_argv; u8 *chroot_prefix; u8 *heap, *uri = 0; u8 *bind_uri = (u8 *) "tcp://0.0.0.0/1234"; u8 *connect_uri = (u8 *) "tcp://6.0.1.2/1234"; u64 bytes_to_send = 64 << 10, mbytes; char *app_name; u32 tmp; mheap_t *h; clib_mem_init (0, 256 << 20); heap = clib_mem_get_per_cpu_heap (); h = mheap_header (heap); /* make the main heap thread-safe */ h->flags |= MHEAP_FLAG_THREAD_SAFE; vec_validate (em->rx_buf, 128 << 10); em->session_index_by_vpp_handles = hash_create (0, sizeof (uword)); em->my_pid = getpid (); em->configured_segment_size = 1 << 20; em->socket_name = 0; em->use_sock_api = 1; clib_time_init (&em->clib_time); init_error_string_table (em); svm_fifo_segment_main_init (0x200000000ULL, 20); 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)) em->configured_segment_size = tmp << 20; else if (unformat (a, "segment-size %dG", &tmp)) em->configured_segment_size = tmp << 30; else if (unformat (a, "master")) i_am_master = 1; else if (unformat (a, "slave")) i_am_master = 0; else if (unformat (a, "drop")) drop_packets = 1; else if (unformat (a, "test")) test_return_packets = 1; else if (unformat (a, "mbytes %lld", &mbytes)) { bytes_to_send = mbytes << 20; } else if (unformat (a, "gbytes %lld", &mbytes)) { bytes_to_send = mbytes << 30; } else if (unformat (a, "socket-name %s", &em->socket_name)) ; else if (unformat (a, "use-svm-api")) em->use_sock_api = 0; else { fformat (stderr, "%s: usage [master|slave]\n"); exit (1); } } if (!em->socket_name) em->socket_name = format (0, "%s%c", API_SOCKET_FILE, 0); if (uri) { em->uri = format (0, "%s%c", uri, 0); em->connect_uri = format (0, "%s%c", uri, 0); } else { em->uri = format (0, "%s%c", bind_uri, 0); em->connect_uri = format (0, "%s%c", connect_uri, 0); } em->i_am_master = i_am_master; em->segment_main = &svm_fifo_segment_main; em->drop_packets = drop_packets; em->test_return_packets = test_return_packets; em->bytes_to_send = bytes_to_send; em->time_to_stop = 0; setup_signal_handlers (); tcp_echo_api_hookup (em); app_name = i_am_master ? "tcp_echo_server" : "tcp_echo_client"; if (connect_to_vpp (app_name) < 0) { svm_region_exit (); fformat (stderr, "Couldn't connect to vpe, exiting...\n"); exit (1); } if (i_am_master == 0) client_run (em); else server_run (em); disconnect_from_vpp (em); exit (0); } /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */