/* * Copyright (c) 2015-2019 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 typedef enum { EVENT_WAKEUP = 1, } http_process_event_t; typedef struct { u32 hs_index; u32 thread_index; u64 node_index; } http_server_args; typedef enum { HTTP_STATE_CLOSED, HTTP_STATE_ESTABLISHED, HTTP_STATE_OK_SENT, } http_session_state_t; typedef struct { CLIB_CACHE_LINE_ALIGN_MARK (cacheline0); #define _(type, name) type name; foreach_app_session_field #undef _ u32 thread_index; u8 *rx_buf; u32 vpp_session_index; u64 vpp_session_handle; } http_session_t; typedef struct { http_session_t **sessions; clib_rwlock_t sessions_lock; u32 **session_to_http_session; svm_msg_q_t **vpp_queue; 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; u8 *uri; u32 is_static; vlib_main_t *vlib_main; } http_server_main_t; http_server_main_t http_server_main; static void http_server_sessions_reader_lock (void) { clib_rwlock_reader_lock (&http_server_main.sessions_lock); } static void http_server_sessions_reader_unlock (void) { clib_rwlock_reader_unlock (&http_server_main.sessions_lock); } static void http_server_sessions_writer_lock (void) { clib_rwlock_writer_lock (&http_server_main.sessions_lock); } static void http_server_sessions_writer_unlock (void) { clib_rwlock_writer_unlock (&http_server_main.sessions_lock); } static void http_server_session_lookup_add (u32 thread_index, u32 s_index, u32 hs_index) { http_server_main_t *hsm = &http_server_main; vec_validate (hsm->session_to_http_session[thread_index], s_index); hsm->session_to_http_session[thread_index][s_index] = hs_index; } static void http_server_session_lookup_del (u32 thread_index, u32 s_index) { http_server_main_t *hsm = &http_server_main; hsm->session_to_http_session[thread_index][s_index] = ~0; } static http_session_t * http_server_session_lookup (u32 thread_index, u32 s_index) { http_server_main_t *hsm = &http_server_main; u32 hs_index; if (s_index < vec_len (hsm->session_to_http_session[thread_index])) { hs_index = hsm->session_to_http_session[thread_index][s_index]; if (hs_index < vec_len (hsm->sessions[thread_index])) return &hsm->sessions[thread_index][hs_index]; } return 0; } static http_session_t * http_server_session_alloc (u32 thread_index) { http_server_main_t *hsm = &http_server_main; http_session_t *hs; pool_get (hsm->sessions[thread_index], hs); memset (hs, 0, sizeof (*hs)); hs->session_index = hs - hsm->sessions[thread_index]; hs->thread_index = thread_index; return hs; } static http_session_t * http_server_session_get (u32 thread_index, u32 hs_index) { http_server_main_t *hsm = &http_server_main; return pool_elt_at_index (hsm->sessions[thread_index], hs_index); } static void http_server_session_free (http_session_t * hs) { http_server_main_t *hsm = &http_server_main; pool_put (hsm->sessions[hs->thread_index], hs); if (CLIB_DEBUG) memset (hs, 0xfa, sizeof (*hs)); } static void http_server_session_cleanup (http_session_t * hs) { if (!hs) return; http_server_session_lookup_del (hs->thread_index, hs->vpp_session_index); vec_free (hs->rx_buf); http_server_session_free (hs); } static void http_process_free (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); } /* *INDENT-OFF* */ static const char *http_ok = "HTTP/1.1 200 OK\r\n"; static const char *http_response = "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 const char *html_header_static = "static reply" "" "
hello
\r\n"; /* *INDENT-ON* */ static u8 *static_http; static u8 *static_ok; 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_fast (output_vec + offset, buffer, buffer_bytes); *output_vecp = output_vec; } void send_data (http_session_t * hs, u8 * data) { http_server_main_t *hsm = &http_server_main; vnet_disconnect_args_t _a = { 0 }, *a = &_a; vlib_main_t *vm = vlib_get_main (); f64 last_sent_timer = vlib_time_now (vm); u32 offset, bytes_to_send; f64 delay = 10e-3; bytes_to_send = vec_len (data); offset = 0; while (bytes_to_send > 0) { int actual_transfer; actual_transfer = svm_fifo_enqueue_nowait (hs->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) { a->handle = hs->vpp_session_handle; a->app_index = hsm->app_index; vnet_disconnect_session (a); 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 (hs->tx_fifo)) session_send_io_evt_to_thread (hs->tx_fifo, SESSION_IO_EVT_TX_FLUSH); delay = 10e-3; } } } static void send_error (http_session_t * hs, char *str) { u8 *data; data = format (0, http_error_template, str); send_data (hs, data); vec_free (data); } static uword http_cli_process (vlib_main_t * vm, vlib_node_runtime_t * rt, vlib_frame_t * f) { u8 *request = 0, *reply = 0, *http = 0, *html = 0; http_server_main_t *hsm = &http_server_main; http_server_args **save_args; http_server_args *args; unformat_input_t input; http_session_t *hs; int i; save_args = vlib_node_get_runtime_data (hsm->vlib_main, rt->node_index); args = *save_args; http_server_sessions_reader_lock (); hs = http_server_session_get (args->thread_index, args->hs_index); ASSERT (hs); request = hs->rx_buf; if (vec_len (request) < 7) { send_error (hs, "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 (hs, "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, vec_dup (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_ok, vec_len (http_ok)); http = format (http, http_response, vec_len (html), html); /* Send it */ send_data (hs, http); out: /* Cleanup */ http_server_sessions_reader_unlock (); vec_free (reply); vec_free (html); vec_free (http); http_process_free (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 (http_session_t * hs) { u32 max_dequeue, cursize; int n_read; cursize = vec_len (hs->rx_buf); max_dequeue = svm_fifo_max_dequeue (hs->rx_fifo); if (PREDICT_FALSE (max_dequeue == 0)) return -1; vec_validate (hs->rx_buf, cursize + max_dequeue - 1); n_read = app_recv_stream_raw (hs->rx_fifo, hs->rx_buf + cursize, max_dequeue, 0, 0 /* peek */ ); ASSERT (n_read == max_dequeue); if (svm_fifo_is_empty (hs->rx_fifo)) svm_fifo_unset_event (hs->rx_fifo); _vec_len (hs->rx_buf) = cursize + n_read; return 0; } static int http_server_rx_callback (session_t * s) { http_server_args *args; http_session_t *hs; int rv; http_server_sessions_reader_lock (); hs = http_server_session_lookup (s->thread_index, s->session_index); if (!hs || hs->session_state != HTTP_STATE_ESTABLISHED) return -1; rv = session_rx_request (hs); if (rv) return rv; /* send the command to a new/recycled vlib process */ args = clib_mem_alloc (sizeof (*args)); args->hs_index = hs->session_index; args->thread_index = hs->thread_index; http_server_sessions_reader_unlock (); /* Send an RPC request via the thread-0 input node */ if (vlib_get_thread_index () != 0) session_send_rpc_evt_to_thread (0, alloc_http_process_callback, args); else alloc_http_process (args); return 0; } static int http_server_rx_callback_static (session_t * s) { http_server_main_t *hsm = &http_server_main; vnet_disconnect_args_t _a = { 0 }, *a = &_a; http_session_t *hs; u32 request_len; u8 *request = 0; int i, rv; hs = http_server_session_lookup (s->thread_index, s->session_index); if (!hs || hs->session_state == HTTP_STATE_CLOSED) return 0; /* ok 200 was sent */ if (hs->session_state == HTTP_STATE_OK_SENT) goto send_data; rv = session_rx_request (hs); if (rv) goto wait_for_data; request = hs->rx_buf; request_len = vec_len (request); if (vec_len (request) < 7) { send_error (hs, "400 Bad Request"); goto close_session; } for (i = 0; i < request_len - 4; i++) { if (request[i] == 'G' && request[i + 1] == 'E' && request[i + 2] == 'T' && request[i + 3] == ' ') goto find_end; } send_error (hs, "400 Bad Request"); goto close_session; find_end: /* check for the end sequence: /r/n/r/n */ if (request[request_len - 1] != 0xa || request[request_len - 3] != 0xa || request[request_len - 2] != 0xd || request[request_len - 4] != 0xd) goto wait_for_data; /* send 200 OK first */ send_data (hs, static_ok); hs->session_state = HTTP_STATE_OK_SENT; goto postpone; send_data: send_data (hs, static_http); http_server_session_cleanup (hs); close_session: a->handle = session_handle (s); a->app_index = hsm->app_index; vnet_disconnect_session (a); return 0; postpone: (void) svm_fifo_set_event (hs->rx_fifo); session_send_io_evt_to_thread (hs->rx_fifo, SESSION_IO_EVT_BUILTIN_RX); return 0; wait_for_data: return 0; } static int http_server_session_accept_callback (session_t * s) { http_server_main_t *hsm = &http_server_main; http_session_t *hs; hsm->vpp_queue[s->thread_index] = session_manager_get_vpp_event_queue (s->thread_index); if (!hsm->is_static) http_server_sessions_writer_lock (); hs = http_server_session_alloc (s->thread_index); http_server_session_lookup_add (s->thread_index, s->session_index, hs->session_index); hs->rx_fifo = s->rx_fifo; hs->tx_fifo = s->tx_fifo; hs->vpp_session_index = s->session_index; hs->vpp_session_handle = session_handle (s); hs->session_state = HTTP_STATE_ESTABLISHED; if (!hsm->is_static) http_server_sessions_writer_unlock (); s->session_state = SESSION_STATE_READY; return 0; } static void http_server_session_disconnect_callback (session_t * s) { http_server_main_t *hsm = &http_server_main; vnet_disconnect_args_t _a = { 0 }, *a = &_a; http_session_t *hs; if (!hsm->is_static) http_server_sessions_writer_lock (); hs = http_server_session_lookup (s->thread_index, s->session_index); http_server_session_cleanup (hs); if (!hsm->is_static) http_server_sessions_writer_unlock (); a->handle = session_handle (s); a->app_index = hsm->app_index; vnet_disconnect_session (a); } static void http_server_session_reset_callback (session_t * s) { http_server_main_t *hsm = &http_server_main; vnet_disconnect_args_t _a = { 0 }, *a = &_a; http_session_t *hs; if (!hsm->is_static) http_server_sessions_writer_lock (); hs = http_server_session_lookup (s->thread_index, s->session_index); http_server_session_cleanup (hs); if (!hsm->is_static) http_server_sessions_writer_unlock (); a->handle = session_handle (s); a->app_index = hsm->app_index; vnet_disconnect_session (a); } static int http_server_session_connected_callback (u32 app_index, u32 api_context, session_t * s, u8 is_fail) { clib_warning ("called..."); return -1; } static int http_server_add_segment_callback (u32 client_index, u64 segment_handle) { 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, .builtin_app_rx_callback = http_server_rx_callback, .session_reset_callback = http_server_session_reset_callback }; static int http_server_attach () { vnet_app_add_tls_cert_args_t _a_cert, *a_cert = &_a_cert; vnet_app_add_tls_key_args_t _a_key, *a_key = &_a_key; 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; clib_memset (a, 0, sizeof (*a)); clib_memset (options, 0, sizeof (options)); if (hsm->private_segment_size) segment_size = hsm->private_segment_size; a->api_client_index = ~0; a->name = format (0, "test_http_server"); 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)) { vec_free (a->name); clib_warning ("failed to attach server"); return -1; } vec_free (a->name); hsm->app_index = a->app_index; clib_memset (a_cert, 0, sizeof (*a_cert)); a_cert->app_index = a->app_index; vec_validate (a_cert->cert, test_srv_crt_rsa_len); clib_memcpy_fast (a_cert->cert, test_srv_crt_rsa, test_srv_crt_rsa_len); vnet_app_add_tls_cert (a_cert); clib_memset (a_key, 0, sizeof (*a_key)); a_key->app_index = a->app_index; vec_validate (a_key->key, test_srv_key_rsa_len); clib_memcpy_fast (a_key->key, test_srv_key_rsa, test_srv_key_rsa_len); vnet_app_add_tls_key (a_key); return 0; } static int http_server_listen () { http_server_main_t *hsm = &http_server_main; vnet_listen_args_t _a, *a = &_a; clib_memset (a, 0, sizeof (*a)); a->app_index = hsm->app_index; a->uri = "tcp://0.0.0.0/80"; if (hsm->uri) a->uri = (char *) hsm->uri; return vnet_bind_uri (a); } static int http_server_create (vlib_main_t * vm) { vlib_thread_main_t *vtm = vlib_get_thread_main (); http_server_main_t *hsm = &http_server_main; u32 num_threads; num_threads = 1 /* main thread */ + vtm->n_threads; vec_validate (hsm->vpp_queue, num_threads - 1); vec_validate (hsm->sessions, num_threads - 1); vec_validate (hsm->session_to_http_session, num_threads - 1); clib_rwlock_init (&hsm->sessions_lock); if (http_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; u64 seg_size; u8 *html; int rv; hsm->prealloc_fifos = 0; hsm->private_segment_size = 0; hsm->fifo_size = 0; hsm->is_static = 0; while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) { if (unformat (input, "static")) hsm->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 if (unformat (input, "uri %s", &hsm->uri)) ; 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 (hsm->is_static) { http_server_session_cb_vft.builtin_app_rx_callback = http_server_rx_callback_static; html = format (0, html_header_static); static_http = format (0, http_response, vec_len (html), html); static_ok = format (0, http_ok); } 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; hsm->my_client_index = ~0; hsm->vlib_main = vm; return 0; } VLIB_INIT_FUNCTION (http_server_main_init); /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */