%v

/* * Copyright (c) 2015-2017 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 typedef enum { EVENT_WAKEUP = 1, } http_process_event_t; typedef struct { u64 session_handle; u64 node_index; u8 *data; } builtin_http_server_args; typedef struct { u8 *rx_buf; unix_shared_memory_queue_t **vpp_queue; u64 byte_index; uword *handler_by_get_request; u32 *free_http_cli_process_node_indices; /* Sever's event queue */ unix_shared_memory_queue_t *vl_input_queue; /* API client handle */ u32 my_client_index; u32 app_index; /* process node index for evnt scheduling */ u32 node_index; vlib_main_t *vlib_main; } http_server_main_t; http_server_main_t http_server_main; static void free_http_process (builtin_http_server_args * args) { vlib_node_runtime_t *rt; vlib_main_t *vm = &vlib_global_main; http_server_main_t *hsm = &http_server_main; vlib_node_t *n; u32 node_index; builtin_http_server_args **save_args; node_index = args->node_index; ASSERT (node_index != 0); n = vlib_get_node (vm, node_index); rt = vlib_node_get_runtime (vm, n->index); save_args = vlib_node_get_runtime_data (vm, n->index); /* Reset process session pointer */ clib_mem_free (*save_args); *save_args = 0; /* Turn off the process node */ vlib_node_set_state (vm, rt->node_index, VLIB_NODE_STATE_DISABLED); /* add node index to the freelist */ vec_add1 (hsm->free_http_cli_process_node_indices, node_index); } static const char *http_response = "HTTP/1.1 200 OK\r\n" "Content-Type: text/html\r\n" "Expires: Mon, 11 Jan 1970 10:10:10 GMT\r\n" "Connection: close\r\n" "Pragma: no-cache\r\n" "Content-Length: %d\r\n\r\n%s"; static const char *http_error_template = "HTTP/1.1 %s\r\n" "Content-Type: text/html\r\n" "Expires: Mon, 11 Jan 1970 10:10:10 GMT\r\n" "Connection: close\r\n" "Pragma: no-cache\r\n" "Content-Length: 0\r\n\r\n"; /* Header, including incantation to suppress favicon.ico requests */ static const char *html_header_template = "%v" "

";

static const char *html_footer = "

\r\n"; static void http_cli_output (uword arg, u8 * buffer, uword buffer_bytes) { u8 **output_vecp = (u8 **) arg; u8 *output_vec; u32 offset; output_vec = *output_vecp; offset = vec_len (output_vec); vec_validate (output_vec, offset + buffer_bytes - 1); clib_memcpy (output_vec + offset, buffer, buffer_bytes); *output_vecp = output_vec; } void send_data (builtin_http_server_args * args, u8 * data) { session_fifo_event_t evt; u32 offset, bytes_to_send; f64 delay = 10e-3; http_server_main_t *hsm = &http_server_main; vlib_main_t *vm = hsm->vlib_main; f64 last_sent_timer = vlib_time_now (vm); stream_session_t *s; s = stream_session_get_from_handle (args->session_handle); ASSERT (s); bytes_to_send = vec_len (data); offset = 0; while (bytes_to_send > 0) { int actual_transfer; actual_transfer = svm_fifo_enqueue_nowait (s->server_tx_fifo, bytes_to_send, data + offset); /* Made any progress? */ if (actual_transfer <= 0) { vlib_process_suspend (vm, delay); /* 10s deadman timer */ if (vlib_time_now (vm) > last_sent_timer + 10.0) { /* $$$$ FC: reset transport session here? */ break; } /* Exponential backoff, within reason */ if (delay < 1.0) delay = delay * 2.0; } else { last_sent_timer = vlib_time_now (vm); offset += actual_transfer; bytes_to_send -= actual_transfer; 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_APP_TX; evt.event_id = 0; unix_shared_memory_queue_add (hsm->vpp_queue[s->thread_index], (u8 *) & evt, 0 /* do wait for mutex */ ); } delay = 10e-3; } } } static void send_error (builtin_http_server_args * args, char *str) { u8 *data; data = format (0, http_error_template, str); send_data (args, data); vec_free (data); } static uword http_cli_process (vlib_main_t * vm, vlib_node_runtime_t * rt, vlib_frame_t * f) { http_server_main_t *hsm = &http_server_main; u8 *request = 0, *reply = 0; builtin_http_server_args **save_args; builtin_http_server_args *args; unformat_input_t input; int i; u8 *http = 0, *html = 0; save_args = vlib_node_get_runtime_data (hsm->vlib_main, rt->node_index); args = *save_args; request = (u8 *) (void *) (args->data); if (vec_len (request) < 7) { send_error (args, "400 Bad Request"); goto out; } for (i = 0; i < vec_len (request) - 4; i++) { if (request[i] == 'G' && request[i + 1] == 'E' && request[i + 2] == 'T' && request[i + 3] == ' ') goto found; } bad_request: send_error (args, "400 Bad Request"); goto out; found: /* Lose "GET " */ vec_delete (request, i + 5, 0); /* Replace slashes with spaces, stop at the end of the path */ i = 0; while (1) { if (request[i] == '/') request[i] = ' '; else if (request[i] == ' ') { /* vlib_cli_input is vector-based, no need for a NULL */ _vec_len (request) = i; break; } i++; /* Should never happen */ if (i == vec_len (request)) goto bad_request; } /* Generate the html header */ html = format (0, html_header_template, request /* title */ ); /* Run the command */ unformat_init_vector (&input, request); vlib_cli_input (vm, &input, http_cli_output, (uword) & reply); unformat_free (&input); request = 0; /* Generate the html page */ html = format (html, "%v", reply); html = format (html, html_footer); /* And the http reply */ http = format (0, http_response, vec_len (html), html); /* Send it */ send_data (args, http); out: /* Cleanup */ vec_free (request); vec_free (reply); vec_free (html); vec_free (http); free_http_process (args); return (0); } static void alloc_http_process (builtin_http_server_args * args) { char *name; vlib_node_t *n; http_server_main_t *hsm = &http_server_main; vlib_main_t *vm = hsm->vlib_main; uword l = vec_len (hsm->free_http_cli_process_node_indices); builtin_http_server_args **save_args; if (vec_len (hsm->free_http_cli_process_node_indices) > 0) { n = vlib_get_node (vm, hsm->free_http_cli_process_node_indices[l - 1]); vlib_node_set_state (vm, n->index, VLIB_NODE_STATE_POLLING); _vec_len (hsm->free_http_cli_process_node_indices) = l - 1; } else { static vlib_node_registration_t r = { .function = http_cli_process, .type = VLIB_NODE_TYPE_PROCESS, .process_log2_n_stack_bytes = 16, .runtime_data_bytes = sizeof (void *), }; name = (char *) format (0, "http-cli-%d", l); r.name = name; vlib_register_node (vm, &r); vec_free (name); n = vlib_get_node (vm, r.index); } /* Save the node index in the args. It won't be zero. */ args->node_index = n->index; /* Save the args (pointer) in the node runtime */ save_args = vlib_node_get_runtime_data (vm, n->index); *save_args = args; vlib_start_process (vm, n->runtime_index); } static void alloc_http_process_callback (void *cb_args) { alloc_http_process ((builtin_http_server_args *) cb_args); } static int http_server_rx_callback (stream_session_t * s) { u32 max_dequeue; int actual_transfer; http_server_main_t *hsm = &http_server_main; svm_fifo_t *rx_fifo; builtin_http_server_args *args; rx_fifo = s->server_rx_fifo; max_dequeue = svm_fifo_max_dequeue (rx_fifo); svm_fifo_unset_event (rx_fifo); if (PREDICT_FALSE (max_dequeue == 0)) return 0; vec_validate (hsm->rx_buf, max_dequeue - 1); _vec_len (hsm->rx_buf) = max_dequeue; actual_transfer = svm_fifo_dequeue_nowait (rx_fifo, max_dequeue, hsm->rx_buf); ASSERT (actual_transfer > 0); _vec_len (hsm->rx_buf) = actual_transfer; /* send the command to a new/recycled vlib process */ args = clib_mem_alloc (sizeof (*args)); args->data = vec_dup (hsm->rx_buf); args->session_handle = stream_session_handle (s); /* Send an RPC request via the thread-0 input node */ if (vlib_get_thread_index () != 0) { session_fifo_event_t evt; evt.rpc_args.fp = alloc_http_process_callback; evt.rpc_args.arg = args; evt.event_type = FIFO_EVENT_RPC; unix_shared_memory_queue_add (session_manager_get_vpp_event_queue (0 /* main thread */ ), (u8 *) & evt, 0 /* do wait for mutex */ ); } else alloc_http_process (args); return 0; } static int builtin_session_accept_callback (stream_session_t * s) { http_server_main_t *bsm = &http_server_main; bsm->vpp_queue[s->thread_index] = session_manager_get_vpp_event_queue (s->thread_index); s->session_state = SESSION_STATE_READY; bsm->byte_index = 0; return 0; } static void builtin_session_disconnect_callback (stream_session_t * s) { http_server_main_t *bsm = &http_server_main; vnet_disconnect_args_t _a, *a = &_a; a->handle = stream_session_handle (s); a->app_index = bsm->app_index; vnet_disconnect_session (a); } static void builtin_session_reset_callback (stream_session_t * s) { clib_warning ("called.. "); stream_session_cleanup (s); } static int builtin_session_connected_callback (u32 app_index, u32 api_context, stream_session_t * s, u8 is_fail) { clib_warning ("called..."); return -1; } static int builtin_add_segment_callback (u32 client_index, const u8 * seg_name, u32 seg_size) { clib_warning ("called..."); return -1; } static int builtin_redirect_connect_callback (u32 client_index, void *mp) { clib_warning ("called..."); return -1; } static session_cb_vft_t builtin_session_cb_vft = { .session_accept_callback = builtin_session_accept_callback, .session_disconnect_callback = builtin_session_disconnect_callback, .session_connected_callback = builtin_session_connected_callback, .add_segment_callback = builtin_add_segment_callback, .redirect_connect_callback = builtin_redirect_connect_callback, .builtin_server_rx_callback = http_server_rx_callback, .session_reset_callback = builtin_session_reset_callback }; /* Abuse VPP's input queue */ static int create_api_loopback (vlib_main_t * vm) { http_server_main_t *hsm = &http_server_main; api_main_t *am = &api_main; vl_shmem_hdr_t *shmem_hdr; shmem_hdr = am->shmem_hdr; hsm->vl_input_queue = shmem_hdr->vl_input_queue; hsm->my_client_index = vl_api_memclnt_create_internal ("tcp_test_client", hsm->vl_input_queue); return 0; } static int server_attach () { http_server_main_t *hsm = &http_server_main; u8 segment_name[128]; u64 options[SESSION_OPTIONS_N_OPTIONS]; vnet_app_attach_args_t _a, *a = &_a; memset (a, 0, sizeof (*a)); memset (options, 0, sizeof (options)); a->api_client_index = hsm->my_client_index; a->session_cb_vft = &builtin_session_cb_vft; a->options = options; a->options[SESSION_OPTIONS_SEGMENT_SIZE] = 128 << 20; a->options[SESSION_OPTIONS_RX_FIFO_SIZE] = 8 << 10; a->options[SESSION_OPTIONS_TX_FIFO_SIZE] = 32 << 10; a->options[APP_OPTIONS_FLAGS] = APP_OPTIONS_FLAGS_BUILTIN_APP; a->options[APP_OPTIONS_PREALLOC_FIFO_PAIRS] = 16; a->segment_name = segment_name; a->segment_name_length = ARRAY_LEN (segment_name); if (vnet_application_attach (a)) { clib_warning ("failed to attach server"); return -1; } hsm->app_index = a->app_index; return 0; } static int server_listen () { http_server_main_t *hsm = &http_server_main; vnet_bind_args_t _a, *a = &_a; memset (a, 0, sizeof (*a)); a->app_index = hsm->app_index; a->uri = "tcp://0.0.0.0/80"; return vnet_bind_uri (a); } static int server_create (vlib_main_t * vm) { http_server_main_t *hsm = &http_server_main; u32 num_threads; vlib_thread_main_t *vtm = vlib_get_thread_main (); ASSERT (hsm->my_client_index == (u32) ~ 0); if (create_api_loopback (vm)) return -1; num_threads = 1 /* main thread */ + vtm->n_threads; vec_validate (http_server_main.vpp_queue, num_threads - 1); if (server_attach ()) { clib_warning ("failed to attach server"); return -1; } if (server_listen ()) { clib_warning ("failed to start listening"); return -1; } return 0; } static clib_error_t * server_create_command_fn (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { http_server_main_t *hsm = &http_server_main; int rv; if (hsm->my_client_index != (u32) ~ 0) return clib_error_return (0, "test http server is already running"); vnet_session_enable_disable (vm, 1 /* turn on TCP, etc. */ ); rv = server_create (vm); switch (rv) { case 0: break; default: return clib_error_return (0, "server_create returned %d", rv); } return 0; } /* *INDENT-OFF* */ VLIB_CLI_COMMAND (server_create_command, static) = { .path = "test http server", .short_help = "test http server", .function = server_create_command_fn, }; /* *INDENT-ON* */ static clib_error_t * builtin_http_server_main_init (vlib_main_t * vm) { http_server_main_t *hsm = &http_server_main; hsm->my_client_index = ~0; hsm->vlib_main = vm; return 0; } VLIB_INIT_FUNCTION (builtin_http_server_main_init); /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */