| /* |
| * 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 <vnet/vnet.h> |
| #include <vnet/session/application.h> |
| #include <vnet/session/application_interface.h> |
| |
| 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 = "<html><head><title>%v</title>" |
| "</head><link rel=\"icon\" href=\"data:,\"><body><pre>"; |
| |
| static const char *html_footer = "</pre></body></html>\r\n"; |
| |
| static const char |
| *html_header_static = "<html><head><title>static reply</title></head>" |
| "<link rel=\"icon\" href=\"data:,\"><body><pre>hello</pre></body>" |
| "</html>\r\n"; |
| |
| static u8 *static_http; |
| |
| 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 (stream_session_t * s, 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); |
| |
| 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; |
| |
| 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 (stream_session_t * s, char *str) |
| { |
| u8 *data; |
| |
| data = format (0, http_error_template, str); |
| send_data (s, 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; |
| stream_session_t *s; |
| 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; |
| s = session_get_from_handle (args->session_handle); |
| ASSERT (s); |
| |
| request = (u8 *) (void *) (args->data); |
| if (vec_len (request) < 7) |
| { |
| send_error (s, "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 (s, "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 (s, 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 |
| session_rx_request (stream_session_t * s) |
| { |
| http_server_main_t *hsm = &http_server_main; |
| svm_fifo_t *rx_fifo; |
| u32 max_dequeue; |
| int actual_transfer; |
| |
| 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 -1; |
| |
| vec_validate (hsm->rx_buf[s->thread_index], max_dequeue - 1); |
| _vec_len (hsm->rx_buf[s->thread_index]) = max_dequeue; |
| |
| actual_transfer = svm_fifo_dequeue_nowait (rx_fifo, max_dequeue, |
| hsm->rx_buf[s->thread_index]); |
| ASSERT (actual_transfer > 0); |
| _vec_len (hsm->rx_buf[s->thread_index]) = actual_transfer; |
| return 0; |
| } |
| |
| static int |
| http_server_rx_callback (stream_session_t * s) |
| { |
| http_server_main_t *hsm = &http_server_main; |
| builtin_http_server_args *args; |
| int rv; |
| |
| rv = session_rx_request (s); |
| if (rv) |
| return rv; |
| |
| /* send the command to a new/recycled vlib process */ |
| args = clib_mem_alloc (sizeof (*args)); |
| args->data = vec_dup (hsm->rx_buf[s->thread_index]); |
| args->session_handle = 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 |
| http_server_rx_callback_static (stream_session_t * s) |
| { |
| http_server_main_t *hsm = &http_server_main; |
| u8 *request = 0; |
| int i; |
| int rv; |
| |
| rv = session_rx_request (s); |
| if (rv) |
| return rv; |
| |
| request = hsm->rx_buf[s->thread_index]; |
| if (vec_len (request) < 7) |
| { |
| send_error (s, "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; |
| } |
| send_error (s, "400 Bad Request"); |
| goto out; |
| |
| found: |
| |
| /* Send it */ |
| send_data (s, static_http); |
| |
| out: |
| /* Cleanup */ |
| vec_free (request); |
| 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 = 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 ("test_http_server", 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_IS_BUILTIN; |
| 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, is_static = 0; |
| u8 *html; |
| |
| while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) |
| { |
| if (unformat (input, "static")) |
| is_static = 1; |
| else |
| return clib_error_return (0, "unknown input `%U'", |
| format_unformat_error, input); |
| } |
| 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. */ ); |
| |
| if (is_static) |
| { |
| builtin_session_cb_vft.builtin_server_rx_callback = |
| http_server_rx_callback_static; |
| html = format (0, html_header_static); |
| static_http = format (0, http_response, vec_len (html), html); |
| } |
| 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; |
| vlib_thread_main_t *vtm = vlib_get_thread_main (); |
| u32 num_threads; |
| |
| hsm->my_client_index = ~0; |
| hsm->vlib_main = vm; |
| num_threads = 1 /* main thread */ + vtm->n_threads; |
| vec_validate (hsm->rx_buf, num_threads - 1); |
| 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: |
| */ |