diff options
Diffstat (limited to 'src/vnet/session-apps/http_server.c')
| -rw-r--r-- | src/vnet/session-apps/http_server.c | 668 |
1 files changed, 668 insertions, 0 deletions
diff --git a/src/vnet/session-apps/http_server.c b/src/vnet/session-apps/http_server.c new file mode 100644 index 00000000000..07eaab4c1ae --- /dev/null +++ b/src/vnet/session-apps/http_server.c @@ -0,0 +1,668 @@ +/* +* 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; +} http_server_args; + +typedef struct +{ + u8 **rx_buf; + svm_queue_t **vpp_queue; + u64 byte_index; + + uword *handler_by_get_request; + + u32 *free_http_cli_process_node_indices; + + /* Sever's event queue */ + svm_queue_t *vl_input_queue; + + /* API client handle */ + u32 my_client_index; + + u32 app_index; + + /* process node index for evnt scheduling */ + u32 node_index; + + u32 prealloc_fifos; + u32 private_segment_size; + u32 fifo_size; + vlib_main_t *vlib_main; +} http_server_main_t; + +http_server_main_t http_server_main; + +static void +free_http_process (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; + 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; + + svm_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; + http_server_args **save_args; + 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 (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); + 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 ((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; + 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; + svm_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); + hsm->rx_buf[s->thread_index] = request; + return 0; +} + +static int +http_server_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 +http_server_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 +http_server_session_reset_callback (stream_session_t * s) +{ + clib_warning ("called.. "); + stream_session_cleanup (s); +} + +static int +http_server_session_connected_callback (u32 app_index, u32 api_context, + stream_session_t * s, u8 is_fail) +{ + clib_warning ("called..."); + return -1; +} + +static int +http_server_add_segment_callback (u32 client_index, const ssvm_private_t * sp) +{ + clib_warning ("called..."); + return -1; +} + +static int +http_server_redirect_connect_callback (u32 client_index, void *mp) +{ + clib_warning ("called..."); + return -1; +} + +static session_cb_vft_t http_server_session_cb_vft = { + .session_accept_callback = http_server_session_accept_callback, + .session_disconnect_callback = http_server_session_disconnect_callback, + .session_connected_callback = http_server_session_connected_callback, + .add_segment_callback = http_server_add_segment_callback, + .redirect_connect_callback = http_server_redirect_connect_callback, + .builtin_server_rx_callback = http_server_rx_callback, + .session_reset_callback = http_server_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 ("http_server", hsm->vl_input_queue); + return 0; +} + +static int +server_attach () +{ + http_server_main_t *hsm = &http_server_main; + u64 options[APP_OPTIONS_N_OPTIONS]; + vnet_app_attach_args_t _a, *a = &_a; + u32 segment_size = 128 << 20; + + memset (a, 0, sizeof (*a)); + memset (options, 0, sizeof (options)); + + if (hsm->private_segment_size) + segment_size = hsm->private_segment_size; + + a->api_client_index = hsm->my_client_index; + a->session_cb_vft = &http_server_session_cb_vft; + a->options = options; + a->options[APP_OPTIONS_SEGMENT_SIZE] = segment_size; + a->options[APP_OPTIONS_RX_FIFO_SIZE] = + hsm->fifo_size ? hsm->fifo_size : 8 << 10; + a->options[APP_OPTIONS_TX_FIFO_SIZE] = + hsm->fifo_size ? hsm->fifo_size : 32 << 10; + a->options[APP_OPTIONS_FLAGS] = APP_OPTIONS_FLAGS_IS_BUILTIN; + a->options[APP_OPTIONS_PREALLOC_FIFO_PAIRS] = hsm->prealloc_fifos; + + if (vnet_application_attach (a)) + { + clib_warning ("failed to attach server"); + return -1; + } + hsm->app_index = a->app_index; + return 0; +} + +static int +http_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 +http_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 (http_server_listen ()) + { + clib_warning ("failed to start listening"); + return -1; + } + return 0; +} + +static clib_error_t * +http_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; + u64 seg_size; + u8 *html; + + hsm->prealloc_fifos = 0; + hsm->private_segment_size = 0; + hsm->fifo_size = 0; + while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) + { + if (unformat (input, "static")) + is_static = 1; + else if (unformat (input, "prealloc-fifos %d", &hsm->prealloc_fifos)) + ; + else if (unformat (input, "private-segment-size %U", + unformat_memory_size, &seg_size)) + { + if (seg_size >= 0x100000000ULL) + { + vlib_cli_output (vm, "private segment size %llu, too large", + seg_size); + return 0; + } + hsm->private_segment_size = seg_size; + } + else if (unformat (input, "fifo-size %d", &hsm->fifo_size)) + hsm->fifo_size <<= 10; + 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) + { + http_server_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 = http_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 (http_server_create_command, static) = +{ + .path = "test http server", + .short_help = "test http server", + .function = http_server_create_command_fn, +}; +/* *INDENT-ON* */ + +static clib_error_t * +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 (http_server_main_init); + +/* +* fd.io coding-style-patch-verification: ON +* +* Local Variables: +* eval: (c-set-style "gnu") +* End: +*/ |