Line data Source code
1 : /*
2 : * Copyright (c) 2022 Cisco and/or its affiliates.
3 : * Licensed under the Apache License, Version 2.0 (the "License");
4 : * you may not use this file except in compliance with the License.
5 : * You may obtain a copy of the License at:
6 : *
7 : * http://www.apache.org/licenses/LICENSE-2.0
8 : *
9 : * Unless required by applicable law or agreed to in writing, software
10 : * distributed under the License is distributed on an "AS IS" BASIS,
11 : * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 : * See the License for the specific language governing permissions and
13 : * limitations under the License.
14 : */
15 :
16 : #include <http/http.h>
17 : #include <vnet/session/session.h>
18 : #include <http/http_timer.h>
19 :
20 : static http_main_t http_main;
21 :
22 : #define HTTP_FIFO_THRESH (16 << 10)
23 : #define CONTENT_LEN_STR "Content-Length: "
24 :
25 : /* HTTP state machine result */
26 : typedef enum http_sm_result_t_
27 : {
28 : HTTP_SM_STOP = 0,
29 : HTTP_SM_CONTINUE = 1,
30 : HTTP_SM_ERROR = -1,
31 : } http_sm_result_t;
32 :
33 : const char *http_status_code_str[] = {
34 : #define _(c, s, str) str,
35 : foreach_http_status_code
36 : #undef _
37 : };
38 :
39 : const char *http_content_type_str[] = {
40 : #define _(s, ext, str) str,
41 : foreach_http_content_type
42 : #undef _
43 : };
44 :
45 : const http_buffer_type_t msg_to_buf_type[] = {
46 : [HTTP_MSG_DATA_INLINE] = HTTP_BUFFER_FIFO,
47 : [HTTP_MSG_DATA_PTR] = HTTP_BUFFER_PTR,
48 : };
49 :
50 : static inline http_worker_t *
51 0 : http_worker_get (u32 thread_index)
52 : {
53 0 : return &http_main.wrk[thread_index];
54 : }
55 :
56 : static inline u32
57 0 : http_conn_alloc_w_thread (u32 thread_index)
58 : {
59 0 : http_worker_t *wrk = http_worker_get (thread_index);
60 : http_conn_t *hc;
61 :
62 0 : pool_get_aligned_safe (wrk->conn_pool, hc, CLIB_CACHE_LINE_BYTES);
63 0 : clib_memset (hc, 0, sizeof (*hc));
64 0 : hc->c_thread_index = thread_index;
65 0 : hc->h_hc_index = hc - wrk->conn_pool;
66 0 : hc->h_pa_session_handle = SESSION_INVALID_HANDLE;
67 0 : hc->h_tc_session_handle = SESSION_INVALID_HANDLE;
68 0 : return hc->h_hc_index;
69 : }
70 :
71 : static inline http_conn_t *
72 0 : http_conn_get_w_thread (u32 hc_index, u32 thread_index)
73 : {
74 0 : http_worker_t *wrk = http_worker_get (thread_index);
75 0 : return pool_elt_at_index (wrk->conn_pool, hc_index);
76 : }
77 :
78 : void
79 0 : http_conn_free (http_conn_t *hc)
80 : {
81 0 : http_worker_t *wrk = http_worker_get (hc->c_thread_index);
82 0 : pool_put (wrk->conn_pool, hc);
83 0 : }
84 :
85 : static u32
86 3 : http_listener_alloc (void)
87 : {
88 3 : http_main_t *hm = &http_main;
89 : http_conn_t *lhc;
90 :
91 3 : pool_get_zero (hm->listener_pool, lhc);
92 3 : lhc->c_c_index = lhc - hm->listener_pool;
93 3 : return lhc->c_c_index;
94 : }
95 :
96 : http_conn_t *
97 9 : http_listener_get (u32 lhc_index)
98 : {
99 9 : return pool_elt_at_index (http_main.listener_pool, lhc_index);
100 : }
101 :
102 : void
103 0 : http_listener_free (http_conn_t *lhc)
104 : {
105 0 : http_main_t *hm = &http_main;
106 :
107 : if (CLIB_DEBUG)
108 0 : memset (lhc, 0xfc, sizeof (*lhc));
109 0 : pool_put (hm->listener_pool, lhc);
110 0 : }
111 :
112 : void
113 0 : http_disconnect_transport (http_conn_t *hc)
114 : {
115 0 : vnet_disconnect_args_t a = {
116 0 : .handle = hc->h_tc_session_handle,
117 0 : .app_index = http_main.app_index,
118 : };
119 :
120 0 : hc->state = HTTP_CONN_STATE_CLOSED;
121 :
122 0 : if (vnet_disconnect_session (&a))
123 0 : clib_warning ("disconnect returned");
124 0 : }
125 :
126 : static void
127 0 : http_conn_timeout_cb (void *hc_handlep)
128 : {
129 : http_conn_t *hc;
130 : uword hs_handle;
131 :
132 0 : hs_handle = pointer_to_uword (hc_handlep);
133 0 : hc = http_conn_get_w_thread (hs_handle & 0x00FFFFFF, hs_handle >> 24);
134 :
135 : HTTP_DBG (1, "terminate thread %d index %d hs %llx", hs_handle >> 24,
136 : hs_handle & 0x00FFFFFF, hc);
137 0 : if (!hc)
138 0 : return;
139 :
140 0 : hc->timer_handle = ~0;
141 0 : session_transport_closing_notify (&hc->connection);
142 0 : http_disconnect_transport (hc);
143 : }
144 :
145 : int
146 0 : http_ts_accept_callback (session_t *ts)
147 : {
148 : session_t *ts_listener, *as, *asl;
149 : app_worker_t *app_wrk;
150 : http_conn_t *lhc, *hc;
151 : u32 hc_index, thresh;
152 : int rv;
153 :
154 0 : ts_listener = listen_session_get_from_handle (ts->listener_handle);
155 0 : lhc = http_listener_get (ts_listener->opaque);
156 :
157 0 : hc_index = http_conn_alloc_w_thread (ts->thread_index);
158 0 : hc = http_conn_get_w_thread (hc_index, ts->thread_index);
159 0 : clib_memcpy_fast (hc, lhc, sizeof (*lhc));
160 0 : hc->c_thread_index = ts->thread_index;
161 0 : hc->h_hc_index = hc_index;
162 :
163 0 : hc->h_tc_session_handle = session_handle (ts);
164 0 : hc->c_flags |= TRANSPORT_CONNECTION_F_NO_LOOKUP;
165 :
166 0 : hc->state = HTTP_CONN_STATE_ESTABLISHED;
167 0 : hc->http_state = HTTP_STATE_WAIT_METHOD;
168 :
169 0 : ts->session_state = SESSION_STATE_READY;
170 0 : ts->opaque = hc_index;
171 :
172 : /*
173 : * Alloc session and initialize
174 : */
175 0 : as = session_alloc (hc->c_thread_index);
176 0 : hc->c_s_index = as->session_index;
177 :
178 0 : as->app_wrk_index = hc->h_pa_wrk_index;
179 0 : as->connection_index = hc->c_c_index;
180 0 : as->session_state = SESSION_STATE_ACCEPTING;
181 :
182 0 : asl = listen_session_get_from_handle (lhc->h_pa_session_handle);
183 0 : as->session_type = asl->session_type;
184 0 : as->listener_handle = lhc->h_pa_session_handle;
185 :
186 : /*
187 : * Init session fifos and notify app
188 : */
189 0 : if ((rv = app_worker_init_accepted (as)))
190 : {
191 : HTTP_DBG (1, "failed to allocate fifos");
192 0 : session_free (as);
193 0 : return rv;
194 : }
195 :
196 0 : hc->h_pa_session_handle = session_handle (as);
197 0 : hc->h_pa_wrk_index = as->app_wrk_index;
198 0 : app_wrk = app_worker_get (as->app_wrk_index);
199 :
200 : HTTP_DBG (1, "Accepted on listener %u new connection [%u]%x",
201 : ts_listener->opaque, vlib_get_thread_index (), hc_index);
202 :
203 0 : if ((rv = app_worker_accept_notify (app_wrk, as)))
204 : {
205 : HTTP_DBG (0, "app accept returned");
206 0 : session_free (as);
207 0 : return rv;
208 : }
209 :
210 : /* Avoid enqueuing small chunks of data on transport tx notifications. If
211 : * the fifo is small (under 16K) we set the threshold to it's size, meaning
212 : * a notification will be given when the fifo empties.
213 : */
214 0 : ts = session_get_from_handle (hc->h_tc_session_handle);
215 0 : thresh = clib_min (svm_fifo_size (ts->tx_fifo), HTTP_FIFO_THRESH);
216 0 : svm_fifo_set_deq_thresh (ts->tx_fifo, thresh);
217 :
218 0 : http_conn_timer_start (hc);
219 :
220 0 : return 0;
221 : }
222 :
223 : static int
224 0 : http_ts_connected_callback (u32 http_app_index, u32 ho_hc_index, session_t *ts,
225 : session_error_t err)
226 : {
227 : u32 new_hc_index;
228 : session_t *as;
229 : http_conn_t *hc, *ho_hc;
230 : app_worker_t *app_wrk;
231 : int rv;
232 :
233 0 : if (err)
234 : {
235 0 : clib_warning ("ERROR: %d", err);
236 0 : return 0;
237 : }
238 :
239 0 : new_hc_index = http_conn_alloc_w_thread (ts->thread_index);
240 0 : hc = http_conn_get_w_thread (new_hc_index, ts->thread_index);
241 0 : ho_hc = http_conn_get_w_thread (ho_hc_index, 0);
242 :
243 0 : ASSERT (ho_hc->state == HTTP_CONN_STATE_CONNECTING);
244 :
245 0 : clib_memcpy_fast (hc, ho_hc, sizeof (*hc));
246 :
247 0 : hc->c_thread_index = ts->thread_index;
248 0 : hc->h_tc_session_handle = session_handle (ts);
249 0 : hc->c_c_index = new_hc_index;
250 0 : hc->c_flags |= TRANSPORT_CONNECTION_F_NO_LOOKUP;
251 0 : hc->state = HTTP_CONN_STATE_ESTABLISHED;
252 0 : hc->http_state = HTTP_STATE_WAIT_APP;
253 :
254 0 : ts->session_state = SESSION_STATE_READY;
255 0 : ts->opaque = new_hc_index;
256 :
257 : /* allocate app session and initialize */
258 :
259 0 : as = session_alloc (hc->c_thread_index);
260 0 : hc->c_s_index = as->session_index;
261 0 : as->connection_index = hc->c_c_index;
262 0 : as->app_wrk_index = hc->h_pa_wrk_index;
263 0 : as->session_state = SESSION_STATE_READY;
264 0 : as->session_type = session_type_from_proto_and_ip (
265 0 : TRANSPORT_PROTO_HTTP, session_type_is_ip4 (ts->session_type));
266 :
267 0 : app_wrk = app_worker_get (hc->h_pa_wrk_index);
268 0 : if (!app_wrk)
269 : {
270 0 : clib_warning ("no app worker");
271 0 : return -1;
272 : }
273 :
274 0 : if ((rv = app_worker_init_connected (app_wrk, as)))
275 : {
276 : HTTP_DBG (1, "failed to allocate fifos");
277 0 : session_free (as);
278 0 : return rv;
279 : }
280 0 : app_worker_connect_notify (app_wrk, as, err, hc->h_pa_app_api_ctx);
281 0 : hc->h_pa_session_handle = session_handle (as);
282 0 : http_conn_timer_start (hc);
283 :
284 0 : return 0;
285 : }
286 :
287 : static void
288 0 : http_ts_disconnect_callback (session_t *ts)
289 : {
290 : http_conn_t *hc;
291 :
292 0 : hc = http_conn_get_w_thread (ts->opaque, ts->thread_index);
293 :
294 0 : if (hc->state < HTTP_CONN_STATE_TRANSPORT_CLOSED)
295 0 : hc->state = HTTP_CONN_STATE_TRANSPORT_CLOSED;
296 :
297 : /* Nothing more to rx, propagate to app */
298 0 : if (!svm_fifo_max_dequeue_cons (ts->rx_fifo))
299 0 : session_transport_closing_notify (&hc->connection);
300 0 : }
301 :
302 : static void
303 0 : http_ts_reset_callback (session_t *ts)
304 : {
305 : http_conn_t *hc;
306 :
307 0 : hc = http_conn_get_w_thread (ts->opaque, ts->thread_index);
308 :
309 0 : hc->state = HTTP_CONN_STATE_CLOSED;
310 0 : http_buffer_free (&hc->tx_buf);
311 0 : hc->http_state = HTTP_STATE_WAIT_METHOD;
312 0 : session_transport_reset_notify (&hc->connection);
313 :
314 0 : http_disconnect_transport (hc);
315 0 : }
316 :
317 : /**
318 : * http error boilerplate
319 : */
320 : static const char *http_error_template = "HTTP/1.1 %s\r\n"
321 : "Date: %U GMT\r\n"
322 : "Content-Type: text/html\r\n"
323 : "Connection: close\r\n"
324 : "Pragma: no-cache\r\n"
325 : "Content-Length: 0\r\n\r\n";
326 :
327 : static const char *http_redirect_template = "HTTP/1.1 %s\r\n";
328 :
329 : /**
330 : * http response boilerplate
331 : */
332 : static const char *http_response_template = "HTTP/1.1 %s\r\n"
333 : "Date: %U GMT\r\n"
334 : "Expires: %U GMT\r\n"
335 : "Server: VPP Static\r\n"
336 : "Content-Type: %s\r\n"
337 : "Content-Length: %lu\r\n\r\n";
338 :
339 : static const char *http_request_template = "GET %s HTTP/1.1\r\n"
340 : "User-Agent: VPP HTTP client\r\n"
341 : "Accept: */*\r\n";
342 :
343 : static u32
344 0 : send_data (http_conn_t *hc, u8 *data, u32 length, u32 offset)
345 : {
346 0 : const u32 max_burst = 64 << 10;
347 : session_t *ts;
348 : u32 to_send;
349 : int sent;
350 :
351 0 : ts = session_get_from_handle (hc->h_tc_session_handle);
352 :
353 0 : to_send = clib_min (length - offset, max_burst);
354 0 : sent = svm_fifo_enqueue (ts->tx_fifo, to_send, data + offset);
355 :
356 0 : if (sent <= 0)
357 0 : return offset;
358 :
359 0 : if (svm_fifo_set_event (ts->tx_fifo))
360 0 : session_send_io_evt_to_thread (ts->tx_fifo, SESSION_IO_EVT_TX);
361 :
362 0 : return (offset + sent);
363 : }
364 :
365 : static void
366 0 : send_error (http_conn_t *hc, http_status_code_t ec)
367 : {
368 0 : http_main_t *hm = &http_main;
369 : u8 *data;
370 : f64 now;
371 :
372 0 : if (ec >= HTTP_N_STATUS)
373 0 : ec = HTTP_STATUS_INTERNAL_ERROR;
374 :
375 0 : now = clib_timebase_now (&hm->timebase);
376 0 : data = format (0, http_error_template, http_status_code_str[ec],
377 : format_clib_timebase_time, now);
378 0 : send_data (hc, data, vec_len (data), 0);
379 0 : vec_free (data);
380 0 : }
381 :
382 : static int
383 0 : read_http_message (http_conn_t *hc)
384 : {
385 : u32 max_deq, cursize;
386 : session_t *ts;
387 : int n_read;
388 :
389 0 : ts = session_get_from_handle (hc->h_tc_session_handle);
390 :
391 0 : cursize = vec_len (hc->rx_buf);
392 0 : max_deq = svm_fifo_max_dequeue (ts->rx_fifo);
393 0 : if (PREDICT_FALSE (max_deq == 0))
394 0 : return -1;
395 :
396 0 : vec_validate (hc->rx_buf, cursize + max_deq - 1);
397 0 : n_read = svm_fifo_dequeue (ts->rx_fifo, max_deq, hc->rx_buf + cursize);
398 0 : ASSERT (n_read == max_deq);
399 :
400 0 : if (svm_fifo_is_empty (ts->rx_fifo))
401 0 : svm_fifo_unset_event (ts->rx_fifo);
402 :
403 0 : vec_set_len (hc->rx_buf, cursize + n_read);
404 0 : return 0;
405 : }
406 :
407 : static int
408 0 : v_find_index (u8 *vec, u32 offset, char *str)
409 : {
410 0 : int start_index = offset;
411 0 : u32 slen = (u32) strnlen_s_inline (str, 16);
412 0 : u32 vlen = vec_len (vec);
413 :
414 0 : ASSERT (slen > 0);
415 :
416 0 : if (vlen <= slen)
417 0 : return -1;
418 :
419 0 : for (; start_index < (vlen - slen); start_index++)
420 : {
421 0 : if (!memcmp (vec + start_index, str, slen))
422 0 : return start_index;
423 : }
424 :
425 0 : return -1;
426 : }
427 :
428 : /**
429 : * waiting for request method from peer - parse request method and data
430 : */
431 : static http_sm_result_t
432 0 : state_srv_wait_method (http_conn_t *hc, transport_send_params_t *sp)
433 : {
434 : http_status_code_t ec;
435 : app_worker_t *app_wrk;
436 : http_msg_t msg;
437 : session_t *as;
438 : int i, rv;
439 : u32 len;
440 : u8 *buf;
441 :
442 0 : rv = read_http_message (hc);
443 :
444 : /* Nothing yet, wait for data or timer expire */
445 0 : if (rv)
446 0 : return HTTP_SM_STOP;
447 :
448 0 : if (vec_len (hc->rx_buf) < 8)
449 : {
450 0 : ec = HTTP_STATUS_BAD_REQUEST;
451 0 : goto error;
452 : }
453 :
454 0 : if ((i = v_find_index (hc->rx_buf, 0, "GET ")) >= 0)
455 : {
456 0 : hc->method = HTTP_REQ_GET;
457 0 : hc->rx_buf_offset = i + 5;
458 :
459 0 : i = v_find_index (hc->rx_buf, hc->rx_buf_offset, "HTTP");
460 0 : if (i < 0)
461 : {
462 0 : ec = HTTP_STATUS_BAD_REQUEST;
463 0 : goto error;
464 : }
465 :
466 0 : len = i - hc->rx_buf_offset - 1;
467 : }
468 0 : else if ((i = v_find_index (hc->rx_buf, 0, "POST ")) >= 0)
469 : {
470 0 : hc->method = HTTP_REQ_POST;
471 0 : hc->rx_buf_offset = i + 6;
472 0 : len = vec_len (hc->rx_buf) - hc->rx_buf_offset - 1;
473 : }
474 : else
475 : {
476 : HTTP_DBG (0, "Unknown http method");
477 0 : ec = HTTP_STATUS_METHOD_NOT_ALLOWED;
478 0 : goto error;
479 : }
480 :
481 0 : buf = &hc->rx_buf[hc->rx_buf_offset];
482 :
483 0 : msg.type = HTTP_MSG_REQUEST;
484 0 : msg.method_type = hc->method;
485 0 : msg.content_type = HTTP_CONTENT_TEXT_HTML;
486 0 : msg.data.type = HTTP_MSG_DATA_INLINE;
487 0 : msg.data.len = len;
488 :
489 0 : svm_fifo_seg_t segs[2] = { { (u8 *) &msg, sizeof (msg) }, { buf, len } };
490 :
491 0 : as = session_get_from_handle (hc->h_pa_session_handle);
492 0 : rv = svm_fifo_enqueue_segments (as->rx_fifo, segs, 2, 0 /* allow partial */);
493 0 : if (rv < 0 || rv != sizeof (msg) + len)
494 : {
495 0 : clib_warning ("failed app enqueue");
496 : /* This should not happen as we only handle 1 request per session,
497 : * and fifo is allocated, but going forward we should consider
498 : * rescheduling */
499 0 : return HTTP_SM_ERROR;
500 : }
501 :
502 0 : vec_free (hc->rx_buf);
503 0 : hc->http_state = HTTP_STATE_WAIT_APP;
504 :
505 0 : app_wrk = app_worker_get_if_valid (as->app_wrk_index);
506 0 : app_worker_lock_and_send_event (app_wrk, as, SESSION_IO_EVT_RX);
507 :
508 0 : return HTTP_SM_STOP;
509 :
510 0 : error:
511 :
512 0 : send_error (hc, ec);
513 0 : session_transport_closing_notify (&hc->connection);
514 0 : http_disconnect_transport (hc);
515 :
516 0 : return HTTP_SM_ERROR;
517 : }
518 :
519 : /**
520 : * waiting for data from app
521 : */
522 : static http_sm_result_t
523 0 : state_srv_wait_app (http_conn_t *hc, transport_send_params_t *sp)
524 : {
525 0 : http_main_t *hm = &http_main;
526 : http_status_code_t ec;
527 : http_msg_t msg;
528 : session_t *as;
529 : u8 *header;
530 : u32 offset;
531 : f64 now;
532 : int rv;
533 :
534 0 : as = session_get_from_handle (hc->h_pa_session_handle);
535 :
536 0 : rv = svm_fifo_dequeue (as->tx_fifo, sizeof (msg), (u8 *) &msg);
537 0 : ASSERT (rv == sizeof (msg));
538 :
539 0 : if (msg.type != HTTP_MSG_REPLY || msg.data.type > HTTP_MSG_DATA_PTR)
540 : {
541 0 : clib_warning ("unexpected msg type from app %u", msg.type);
542 0 : ec = HTTP_STATUS_INTERNAL_ERROR;
543 0 : goto error;
544 : }
545 :
546 0 : ec = msg.code;
547 :
548 0 : switch (msg.code)
549 : {
550 0 : case HTTP_STATUS_OK:
551 : case HTTP_STATUS_MOVED:
552 0 : break;
553 0 : default:
554 0 : goto error;
555 : }
556 :
557 0 : http_buffer_init (&hc->tx_buf, msg_to_buf_type[msg.data.type], as->tx_fifo,
558 : msg.data.len);
559 :
560 : /*
561 : * Add headers. For now:
562 : * - current time
563 : * - expiration time
564 : * - content type
565 : * - data length
566 : */
567 0 : now = clib_timebase_now (&hm->timebase);
568 :
569 0 : switch (msg.code)
570 : {
571 0 : case HTTP_STATUS_OK:
572 0 : header =
573 0 : format (0, http_response_template, http_status_code_str[msg.code],
574 : /* Date */
575 : format_clib_timebase_time, now,
576 : /* Expires */
577 : format_clib_timebase_time, now + 600.0,
578 : /* Content type */
579 0 : http_content_type_str[msg.content_type],
580 : /* Length */
581 : msg.data.len);
582 0 : break;
583 0 : case HTTP_STATUS_MOVED:
584 0 : header =
585 0 : format (0, http_redirect_template, http_status_code_str[msg.code]);
586 : /* Location: http(s)://new-place already queued up as data */
587 0 : break;
588 0 : default:
589 0 : goto error;
590 : }
591 :
592 0 : offset = send_data (hc, header, vec_len (header), 0);
593 0 : if (offset != vec_len (header))
594 : {
595 0 : clib_warning ("couldn't send response header!");
596 0 : ec = HTTP_STATUS_INTERNAL_ERROR;
597 0 : goto error;
598 : }
599 0 : vec_free (header);
600 :
601 : /* Start sending the actual data */
602 0 : hc->http_state = HTTP_STATE_IO_MORE_DATA;
603 :
604 0 : ASSERT (sp->max_burst_size >= offset);
605 0 : sp->max_burst_size -= offset;
606 :
607 0 : return HTTP_SM_CONTINUE;
608 :
609 0 : error:
610 :
611 0 : send_error (hc, ec);
612 0 : hc->http_state = HTTP_STATE_WAIT_METHOD;
613 0 : session_transport_closing_notify (&hc->connection);
614 0 : http_disconnect_transport (hc);
615 :
616 0 : return HTTP_SM_STOP;
617 : }
618 :
619 : static http_sm_result_t
620 0 : state_srv_send_more_data (http_conn_t *hc, transport_send_params_t *sp)
621 : {
622 0 : u32 max_send = 64 << 10, n_segs;
623 0 : http_buffer_t *hb = &hc->tx_buf;
624 : svm_fifo_seg_t *seg;
625 : session_t *ts;
626 0 : int sent = 0;
627 :
628 0 : max_send = clib_min (max_send, sp->max_burst_size);
629 0 : ts = session_get_from_handle (hc->h_tc_session_handle);
630 0 : if ((seg = http_buffer_get_segs (hb, max_send, &n_segs)))
631 0 : sent = svm_fifo_enqueue_segments (ts->tx_fifo, seg, n_segs,
632 : 1 /* allow partial */);
633 :
634 0 : if (sent > 0)
635 : {
636 : /* Ask scheduler to notify app of deq event if needed */
637 0 : sp->bytes_dequeued += http_buffer_drain (hb, sent);
638 0 : sp->max_burst_size -= sent;
639 : }
640 :
641 : /* Not finished sending all data */
642 0 : if (!http_buffer_is_drained (hb))
643 : {
644 0 : if (sent && svm_fifo_set_event (ts->tx_fifo))
645 0 : session_send_io_evt_to_thread (ts->tx_fifo, SESSION_IO_EVT_TX);
646 :
647 0 : if (svm_fifo_max_enqueue (ts->tx_fifo) < HTTP_FIFO_THRESH)
648 : {
649 : /* Deschedule http session and wait for deq notification if
650 : * underlying ts tx fifo almost full */
651 0 : svm_fifo_add_want_deq_ntf (ts->tx_fifo, SVM_FIFO_WANT_DEQ_NOTIF);
652 0 : transport_connection_deschedule (&hc->connection);
653 0 : sp->flags |= TRANSPORT_SND_F_DESCHED;
654 : }
655 : }
656 : else
657 : {
658 0 : if (sent && svm_fifo_set_event (ts->tx_fifo))
659 0 : session_send_io_evt_to_thread (ts->tx_fifo, SESSION_IO_EVT_TX_FLUSH);
660 :
661 : /* Finished transaction, back to HTTP_STATE_WAIT_METHOD */
662 0 : hc->http_state = HTTP_STATE_WAIT_METHOD;
663 0 : http_buffer_free (&hc->tx_buf);
664 : }
665 :
666 0 : return HTTP_SM_STOP;
667 : }
668 :
669 : static int
670 0 : parse_http_header (http_conn_t *hc, int *content_length)
671 : {
672 : unformat_input_t input;
673 : int i, len;
674 : u8 *line;
675 :
676 0 : if ((i = v_find_index (hc->rx_buf, hc->rx_buf_offset, "200 OK") < 0))
677 : {
678 0 : clib_warning ("bad response code");
679 0 : return -1;
680 : }
681 :
682 0 : i = v_find_index (hc->rx_buf, hc->rx_buf_offset, CONTENT_LEN_STR);
683 0 : if (i < 0)
684 : {
685 0 : clib_warning ("cannot find '%s' in the header!", CONTENT_LEN_STR);
686 0 : return -1;
687 : }
688 :
689 0 : hc->rx_buf_offset = i;
690 :
691 0 : i = v_find_index (hc->rx_buf, hc->rx_buf_offset, "\n");
692 0 : if (i < 0)
693 : {
694 0 : clib_warning ("end of line missing; incomplete data");
695 0 : return -1;
696 : }
697 :
698 0 : len = i - hc->rx_buf_offset;
699 0 : line = vec_new (u8, len);
700 0 : clib_memcpy (line, hc->rx_buf + hc->rx_buf_offset, len);
701 :
702 0 : unformat_init_vector (&input, line);
703 0 : if (!unformat (&input, CONTENT_LEN_STR "%d", content_length))
704 : {
705 0 : clib_warning ("failed to unformat content length!");
706 0 : return -1;
707 : }
708 0 : unformat_free (&input);
709 :
710 : /* skip rest of the header */
711 0 : hc->rx_buf_offset += len;
712 0 : i = v_find_index (hc->rx_buf, hc->rx_buf_offset, "<html>");
713 0 : if (i < 0)
714 : {
715 0 : clib_warning ("<html> tag not found");
716 0 : return -1;
717 : }
718 0 : hc->rx_buf_offset = i;
719 :
720 0 : return 0;
721 : }
722 :
723 : static int
724 0 : state_cln_wait_method (http_conn_t *hc, transport_send_params_t *sp)
725 : {
726 : session_t *as;
727 : http_msg_t msg;
728 : app_worker_t *app_wrk;
729 : int rv, content_length;
730 :
731 0 : rv = read_http_message (hc);
732 0 : if (rv)
733 0 : return HTTP_SM_STOP;
734 :
735 0 : msg.type = HTTP_MSG_REPLY;
736 0 : msg.content_type = HTTP_CONTENT_TEXT_HTML;
737 0 : msg.code = HTTP_STATUS_OK;
738 0 : msg.data.type = HTTP_MSG_DATA_INLINE;
739 0 : msg.data.len = 0;
740 :
741 0 : rv = parse_http_header (hc, &content_length);
742 0 : if (rv)
743 : {
744 0 : clib_warning ("failed to parse http reply");
745 0 : session_transport_closing_notify (&hc->connection);
746 0 : http_disconnect_transport (hc);
747 0 : return -1;
748 : }
749 :
750 0 : msg.data.len = content_length;
751 0 : u32 dlen = vec_len (hc->rx_buf) - hc->rx_buf_offset;
752 0 : as = session_get_from_handle (hc->h_pa_session_handle);
753 0 : svm_fifo_seg_t segs[2] = { { (u8 *) &msg, sizeof (msg) },
754 0 : { &hc->rx_buf[hc->rx_buf_offset], dlen } };
755 :
756 0 : rv = svm_fifo_enqueue_segments (as->rx_fifo, segs, 2, 0 /* allow partial */);
757 0 : if (rv < 0)
758 : {
759 0 : clib_warning ("error enqueue");
760 0 : return HTTP_SM_ERROR;
761 : }
762 0 : hc->rx_buf_offset += dlen;
763 0 : hc->http_state = HTTP_STATE_IO_MORE_DATA;
764 0 : hc->to_recv = content_length - dlen;
765 :
766 0 : if (hc->rx_buf_offset == vec_len (hc->rx_buf))
767 : {
768 0 : vec_reset_length (hc->rx_buf);
769 0 : hc->rx_buf_offset = 0;
770 : }
771 :
772 0 : if (hc->to_recv == 0)
773 : {
774 0 : hc->rx_buf_offset = 0;
775 0 : vec_reset_length (hc->rx_buf);
776 0 : hc->http_state = HTTP_STATE_WAIT_APP;
777 : }
778 :
779 0 : app_wrk = app_worker_get_if_valid (as->app_wrk_index);
780 0 : app_worker_lock_and_send_event (app_wrk, as, SESSION_IO_EVT_RX);
781 0 : return HTTP_SM_STOP;
782 : }
783 :
784 : static int
785 0 : cln_drain_rx_buf (http_conn_t *hc, session_t *ts, session_t *as)
786 : {
787 : app_worker_t *app_wrk;
788 0 : u32 max_enq, n_enq, dlen = vec_len (hc->rx_buf) - hc->rx_buf_offset;
789 : int rv;
790 :
791 0 : max_enq = svm_fifo_max_enqueue (as->rx_fifo);
792 0 : n_enq = clib_min (max_enq, dlen);
793 0 : rv = svm_fifo_enqueue (as->rx_fifo, n_enq, &hc->rx_buf[hc->rx_buf_offset]);
794 0 : if (rv < 0)
795 : {
796 0 : clib_warning ("enqueue failed");
797 0 : return -1;
798 : }
799 :
800 0 : hc->rx_buf_offset += rv;
801 :
802 0 : if (hc->rx_buf_offset >= vec_len (hc->rx_buf))
803 : {
804 0 : vec_reset_length (hc->rx_buf);
805 0 : hc->rx_buf_offset = 0;
806 : }
807 :
808 0 : app_wrk = app_worker_get_if_valid (as->app_wrk_index);
809 0 : ASSERT (app_wrk);
810 :
811 0 : app_worker_lock_and_send_event (app_wrk, as, SESSION_IO_EVT_RX);
812 0 : return 1;
813 : }
814 :
815 : static http_sm_result_t
816 0 : state_cln_recv_more_data (http_conn_t *hc, transport_send_params_t *sp)
817 : {
818 : session_t *as;
819 : u32 max_deq;
820 : session_t *ts;
821 : int n_read, rv;
822 :
823 0 : as = session_get_from_handle (hc->h_pa_session_handle);
824 0 : ts = session_get_from_handle (hc->h_tc_session_handle);
825 :
826 0 : u32 dlen = vec_len (hc->rx_buf) - hc->rx_buf_offset;
827 0 : if (dlen)
828 : {
829 0 : rv = cln_drain_rx_buf (hc, ts, as);
830 0 : if (rv < 0)
831 : {
832 0 : clib_warning ("drain rx error!");
833 0 : return HTTP_SM_ERROR;
834 : }
835 0 : goto maybe_reschedule;
836 : }
837 :
838 0 : if (hc->to_recv == 0)
839 : {
840 0 : ASSERT (vec_len (hc->rx_buf) == 0);
841 0 : ASSERT (hc->rx_buf_offset == 0);
842 0 : hc->http_state = HTTP_STATE_WAIT_APP;
843 0 : return HTTP_SM_STOP;
844 : }
845 :
846 0 : max_deq = svm_fifo_max_dequeue (ts->rx_fifo);
847 0 : if (max_deq == 0)
848 0 : return HTTP_SM_STOP;
849 :
850 0 : ASSERT (vec_len (hc->rx_buf) == 0);
851 0 : ASSERT (hc->rx_buf_offset == 0);
852 :
853 0 : vec_validate (hc->rx_buf, max_deq - 1);
854 0 : n_read = svm_fifo_dequeue (ts->rx_fifo, max_deq, hc->rx_buf);
855 0 : ASSERT (n_read == max_deq);
856 :
857 0 : if (svm_fifo_is_empty (ts->rx_fifo))
858 0 : svm_fifo_unset_event (ts->rx_fifo);
859 :
860 0 : hc->to_recv -= n_read;
861 0 : vec_set_len (hc->rx_buf, max_deq);
862 :
863 0 : maybe_reschedule:
864 0 : if (hc->rx_buf_offset < vec_len (hc->rx_buf) ||
865 0 : svm_fifo_max_dequeue_cons (ts->rx_fifo))
866 : {
867 0 : if (svm_fifo_set_event (ts->rx_fifo))
868 0 : session_send_io_evt_to_thread (ts->rx_fifo, SESSION_IO_EVT_BUILTIN_RX);
869 : }
870 0 : return HTTP_SM_CONTINUE;
871 : }
872 :
873 : static http_sm_result_t
874 0 : state_cln_wait_app (http_conn_t *hc, transport_send_params_t *sp)
875 : {
876 : session_t *as;
877 : http_msg_t msg;
878 : http_status_code_t ec;
879 0 : u8 *buf = 0, *request;
880 : u32 offset;
881 : int rv;
882 :
883 0 : as = session_get_from_handle (hc->h_pa_session_handle);
884 0 : rv = svm_fifo_dequeue (as->tx_fifo, sizeof (msg), (u8 *) &msg);
885 0 : ASSERT (rv == sizeof (msg));
886 0 : if (msg.type != HTTP_MSG_REQUEST || msg.data.type > HTTP_MSG_DATA_PTR)
887 : {
888 0 : clib_warning ("unexpected msg type from app %u", msg.type);
889 0 : ec = HTTP_STATUS_INTERNAL_ERROR;
890 0 : goto error;
891 : }
892 :
893 0 : vec_validate (buf, msg.data.len - 1);
894 0 : rv = svm_fifo_dequeue (as->tx_fifo, msg.data.len, buf);
895 0 : ASSERT (rv == msg.data.len);
896 :
897 0 : request = format (0, http_request_template, buf);
898 0 : offset = send_data (hc, request, vec_len (request), 0);
899 0 : if (offset != vec_len (request))
900 : {
901 0 : clib_warning ("sending request failed!");
902 0 : ec = HTTP_STATUS_INTERNAL_ERROR;
903 0 : goto error;
904 : }
905 :
906 0 : hc->http_state = HTTP_STATE_WAIT_METHOD;
907 :
908 0 : vec_free (buf);
909 0 : vec_free (request);
910 :
911 0 : return HTTP_SM_CONTINUE;
912 :
913 0 : error:
914 0 : send_error (hc, ec);
915 0 : session_transport_closing_notify (&hc->connection);
916 0 : http_disconnect_transport (hc);
917 0 : return HTTP_SM_STOP;
918 : }
919 :
920 : typedef http_sm_result_t (*http_sm_handler) (http_conn_t *,
921 : transport_send_params_t *sp);
922 :
923 : static http_sm_handler srv_state_funcs[HTTP_N_STATES] = {
924 : /* Waiting for GET, POST, etc. */
925 : state_srv_wait_method,
926 : /* Wait for data from app */
927 : state_srv_wait_app,
928 : /* Send more data */
929 : state_srv_send_more_data,
930 : };
931 :
932 : static http_sm_handler cln_state_funcs[HTTP_N_STATES] = {
933 : /* wait for reply */
934 : state_cln_wait_method,
935 : /* wait for data from app */
936 : state_cln_wait_app,
937 : /* receive more data */
938 : state_cln_recv_more_data,
939 : };
940 :
941 : static void
942 0 : http_req_run_state_machine (http_conn_t *hc, transport_send_params_t *sp)
943 : {
944 : http_sm_result_t res;
945 0 : http_sm_handler *state_fn =
946 0 : hc->is_client ? cln_state_funcs : srv_state_funcs;
947 : do
948 : {
949 0 : res = state_fn[hc->http_state](hc, sp);
950 0 : if (res == HTTP_SM_ERROR)
951 0 : return;
952 : }
953 0 : while (res == HTTP_SM_CONTINUE);
954 :
955 : /* Reset the session expiration timer */
956 0 : http_conn_timer_update (hc);
957 : }
958 :
959 : static int
960 0 : http_ts_server_rx_callback (session_t *ts, http_conn_t *hc)
961 : {
962 0 : if (hc->http_state != HTTP_STATE_WAIT_METHOD)
963 : {
964 0 : clib_warning ("tcp data in req state %u", hc->http_state);
965 0 : return 0;
966 : }
967 :
968 0 : http_req_run_state_machine (hc, 0);
969 :
970 0 : if (hc->state == HTTP_CONN_STATE_TRANSPORT_CLOSED)
971 : {
972 0 : if (!svm_fifo_max_dequeue_cons (ts->rx_fifo))
973 0 : session_transport_closing_notify (&hc->connection);
974 : }
975 0 : return 0;
976 : }
977 :
978 : static int
979 0 : http_ts_client_rx_callback (session_t *ts, http_conn_t *hc)
980 : {
981 0 : if (hc->http_state != HTTP_STATE_WAIT_METHOD &&
982 0 : hc->http_state != HTTP_STATE_IO_MORE_DATA)
983 : {
984 0 : clib_warning ("http in unexpected state %d (ts %d)", hc->http_state,
985 : ts->session_index);
986 0 : return 0;
987 : }
988 :
989 0 : http_req_run_state_machine (hc, 0);
990 :
991 0 : if (hc->state == HTTP_CONN_STATE_TRANSPORT_CLOSED)
992 : {
993 0 : if (!svm_fifo_max_dequeue_cons (ts->rx_fifo))
994 0 : session_transport_closing_notify (&hc->connection);
995 : }
996 0 : return 0;
997 : }
998 :
999 : static int
1000 0 : http_ts_rx_callback (session_t *ts)
1001 : {
1002 : http_conn_t *hc;
1003 :
1004 0 : hc = http_conn_get_w_thread (ts->opaque, ts->thread_index);
1005 0 : if (hc->is_client)
1006 0 : return http_ts_client_rx_callback (ts, hc);
1007 0 : return http_ts_server_rx_callback (ts, hc);
1008 : }
1009 :
1010 : int
1011 0 : http_ts_builtin_tx_callback (session_t *ts)
1012 : {
1013 : http_conn_t *hc;
1014 :
1015 0 : hc = http_conn_get_w_thread (ts->opaque, ts->thread_index);
1016 0 : transport_connection_reschedule (&hc->connection);
1017 :
1018 0 : return 0;
1019 : }
1020 :
1021 : static void
1022 0 : http_ts_cleanup_callback (session_t *ts, session_cleanup_ntf_t ntf)
1023 : {
1024 : http_conn_t *hc;
1025 :
1026 0 : if (ntf == SESSION_CLEANUP_TRANSPORT)
1027 0 : return;
1028 :
1029 0 : hc = http_conn_get_w_thread (ts->opaque, ts->thread_index);
1030 0 : if (!hc)
1031 : {
1032 0 : clib_warning ("no http connection for %u", ts->session_index);
1033 0 : return;
1034 : }
1035 :
1036 0 : vec_free (hc->rx_buf);
1037 :
1038 0 : http_buffer_free (&hc->tx_buf);
1039 0 : http_conn_timer_stop (hc);
1040 :
1041 0 : session_transport_delete_notify (&hc->connection);
1042 0 : http_conn_free (hc);
1043 : }
1044 :
1045 : int
1046 3 : http_add_segment_callback (u32 client_index, u64 segment_handle)
1047 : {
1048 : /* No-op for builtin */
1049 3 : return 0;
1050 : }
1051 :
1052 : int
1053 0 : http_del_segment_callback (u32 client_index, u64 segment_handle)
1054 : {
1055 0 : return 0;
1056 : }
1057 :
1058 : static session_cb_vft_t http_app_cb_vft = {
1059 : .session_accept_callback = http_ts_accept_callback,
1060 : .session_disconnect_callback = http_ts_disconnect_callback,
1061 : .session_connected_callback = http_ts_connected_callback,
1062 : .session_reset_callback = http_ts_reset_callback,
1063 : .session_cleanup_callback = http_ts_cleanup_callback,
1064 : .add_segment_callback = http_add_segment_callback,
1065 : .del_segment_callback = http_del_segment_callback,
1066 : .builtin_app_rx_callback = http_ts_rx_callback,
1067 : .builtin_app_tx_callback = http_ts_builtin_tx_callback,
1068 : };
1069 :
1070 : static clib_error_t *
1071 57 : http_transport_enable (vlib_main_t *vm, u8 is_en)
1072 : {
1073 57 : vnet_app_detach_args_t _da, *da = &_da;
1074 57 : vnet_app_attach_args_t _a, *a = &_a;
1075 : u64 options[APP_OPTIONS_N_OPTIONS];
1076 57 : http_main_t *hm = &http_main;
1077 :
1078 57 : if (!is_en)
1079 : {
1080 8 : da->app_index = hm->app_index;
1081 8 : da->api_client_index = APP_INVALID_INDEX;
1082 8 : vnet_application_detach (da);
1083 8 : return 0;
1084 : }
1085 :
1086 49 : vec_validate (hm->wrk, vlib_num_workers ());
1087 :
1088 49 : clib_memset (a, 0, sizeof (*a));
1089 49 : clib_memset (options, 0, sizeof (options));
1090 :
1091 49 : a->session_cb_vft = &http_app_cb_vft;
1092 49 : a->api_client_index = APP_INVALID_INDEX;
1093 49 : a->options = options;
1094 49 : a->name = format (0, "http");
1095 49 : a->options[APP_OPTIONS_SEGMENT_SIZE] = hm->first_seg_size;
1096 49 : a->options[APP_OPTIONS_ADD_SEGMENT_SIZE] = hm->add_seg_size;
1097 49 : a->options[APP_OPTIONS_RX_FIFO_SIZE] = hm->fifo_size;
1098 49 : a->options[APP_OPTIONS_TX_FIFO_SIZE] = hm->fifo_size;
1099 49 : a->options[APP_OPTIONS_FLAGS] = APP_OPTIONS_FLAGS_IS_BUILTIN;
1100 49 : a->options[APP_OPTIONS_FLAGS] |= APP_OPTIONS_FLAGS_USE_GLOBAL_SCOPE;
1101 49 : a->options[APP_OPTIONS_FLAGS] |= APP_OPTIONS_FLAGS_IS_TRANSPORT_APP;
1102 :
1103 49 : if (vnet_application_attach (a))
1104 0 : return clib_error_return (0, "failed to attach http app");
1105 :
1106 49 : hm->app_index = a->app_index;
1107 49 : vec_free (a->name);
1108 :
1109 49 : clib_timebase_init (&hm->timebase, 0 /* GMT */, CLIB_TIMEBASE_DAYLIGHT_NONE,
1110 : &vm->clib_time /* share the system clock */);
1111 :
1112 49 : http_timers_init (vm, http_conn_timeout_cb);
1113 :
1114 49 : return 0;
1115 : }
1116 :
1117 : static int
1118 0 : http_transport_connect (transport_endpoint_cfg_t *tep)
1119 : {
1120 0 : vnet_connect_args_t _cargs, *cargs = &_cargs;
1121 0 : http_main_t *hm = &http_main;
1122 0 : session_endpoint_cfg_t *sep = (session_endpoint_cfg_t *) tep;
1123 : application_t *app;
1124 : http_conn_t *hc;
1125 : int error;
1126 : u32 hc_index;
1127 0 : app_worker_t *app_wrk = app_worker_get (sep->app_wrk_index);
1128 :
1129 0 : clib_memset (cargs, 0, sizeof (*cargs));
1130 0 : clib_memcpy (&cargs->sep_ext, sep, sizeof (session_endpoint_cfg_t));
1131 0 : cargs->sep.transport_proto = TRANSPORT_PROTO_TCP;
1132 0 : cargs->app_index = hm->app_index;
1133 0 : app = application_get (app_wrk->app_index);
1134 0 : cargs->sep_ext.ns_index = app->ns_index;
1135 :
1136 0 : hc_index = http_conn_alloc_w_thread (0 /* ts->thread_index */);
1137 0 : hc = http_conn_get_w_thread (hc_index, 0);
1138 0 : hc->h_pa_wrk_index = sep->app_wrk_index;
1139 0 : hc->h_pa_app_api_ctx = sep->opaque;
1140 0 : hc->is_client = 1;
1141 0 : hc->state = HTTP_CONN_STATE_CONNECTING;
1142 0 : cargs->api_context = hc_index;
1143 :
1144 0 : if ((error = vnet_connect (cargs)))
1145 0 : return error;
1146 :
1147 0 : return 0;
1148 : }
1149 :
1150 : static u32
1151 3 : http_start_listen (u32 app_listener_index, transport_endpoint_cfg_t *tep)
1152 : {
1153 3 : vnet_listen_args_t _args = {}, *args = &_args;
1154 : session_t *ts_listener, *app_listener;
1155 3 : http_main_t *hm = &http_main;
1156 : session_endpoint_cfg_t *sep;
1157 : app_worker_t *app_wrk;
1158 : transport_proto_t tp;
1159 : app_listener_t *al;
1160 : application_t *app;
1161 : http_conn_t *lhc;
1162 : u32 lhc_index;
1163 :
1164 3 : sep = (session_endpoint_cfg_t *) tep;
1165 :
1166 3 : app_wrk = app_worker_get (sep->app_wrk_index);
1167 3 : app = application_get (app_wrk->app_index);
1168 :
1169 3 : args->app_index = hm->app_index;
1170 3 : args->sep_ext = *sep;
1171 3 : args->sep_ext.ns_index = app->ns_index;
1172 3 : tp = sep->ext_cfg ? TRANSPORT_PROTO_TLS : TRANSPORT_PROTO_TCP;
1173 3 : args->sep_ext.transport_proto = tp;
1174 :
1175 3 : if (vnet_listen (args))
1176 0 : return SESSION_INVALID_INDEX;
1177 :
1178 3 : lhc_index = http_listener_alloc ();
1179 3 : lhc = http_listener_get (lhc_index);
1180 :
1181 : /* Grab transport connection listener and link to http listener */
1182 3 : lhc->h_tc_session_handle = args->handle;
1183 3 : al = app_listener_get_w_handle (lhc->h_tc_session_handle);
1184 3 : ts_listener = app_listener_get_session (al);
1185 3 : ts_listener->opaque = lhc_index;
1186 :
1187 : /* Grab application listener and link to http listener */
1188 3 : app_listener = listen_session_get (app_listener_index);
1189 3 : lhc->h_pa_wrk_index = sep->app_wrk_index;
1190 3 : lhc->h_pa_session_handle = listen_session_get_handle (app_listener);
1191 3 : lhc->c_s_index = app_listener_index;
1192 3 : lhc->c_flags |= TRANSPORT_CONNECTION_F_NO_LOOKUP;
1193 :
1194 3 : return lhc_index;
1195 : }
1196 :
1197 : static u32
1198 0 : http_stop_listen (u32 listener_index)
1199 : {
1200 : http_conn_t *lhc;
1201 : int rv;
1202 :
1203 0 : lhc = http_listener_get (listener_index);
1204 :
1205 0 : vnet_unlisten_args_t a = {
1206 0 : .handle = lhc->h_tc_session_handle,
1207 0 : .app_index = http_main.app_index,
1208 : .wrk_map_index = 0 /* default wrk */
1209 : };
1210 :
1211 0 : if ((rv = vnet_unlisten (&a)))
1212 0 : clib_warning ("unlisten returned %d", rv);
1213 :
1214 0 : http_listener_free (lhc);
1215 :
1216 0 : return 0;
1217 : }
1218 :
1219 : static void
1220 0 : http_transport_close (u32 hc_index, u32 thread_index)
1221 : {
1222 : session_t *as;
1223 : http_conn_t *hc;
1224 :
1225 : HTTP_DBG (1, "App disconnecting %x", hc_index);
1226 :
1227 0 : hc = http_conn_get_w_thread (hc_index, thread_index);
1228 0 : if (hc->state == HTTP_CONN_STATE_CONNECTING)
1229 : {
1230 0 : hc->state = HTTP_CONN_STATE_APP_CLOSED;
1231 0 : http_disconnect_transport (hc);
1232 0 : return;
1233 : }
1234 :
1235 0 : as = session_get_from_handle (hc->h_pa_session_handle);
1236 :
1237 : /* Nothing more to send, confirm close */
1238 0 : if (!svm_fifo_max_dequeue_cons (as->tx_fifo))
1239 : {
1240 0 : session_transport_closed_notify (&hc->connection);
1241 0 : http_disconnect_transport (hc);
1242 : }
1243 : else
1244 : {
1245 : /* Wait for all data to be written to ts */
1246 0 : hc->state = HTTP_CONN_STATE_APP_CLOSED;
1247 : }
1248 : }
1249 :
1250 : static transport_connection_t *
1251 0 : http_transport_get_connection (u32 hc_index, u32 thread_index)
1252 : {
1253 0 : http_conn_t *hc = http_conn_get_w_thread (hc_index, thread_index);
1254 0 : return &hc->connection;
1255 : }
1256 :
1257 : static transport_connection_t *
1258 6 : http_transport_get_listener (u32 listener_index)
1259 : {
1260 6 : http_conn_t *lhc = http_listener_get (listener_index);
1261 6 : return &lhc->connection;
1262 : }
1263 :
1264 : static int
1265 0 : http_app_tx_callback (void *session, transport_send_params_t *sp)
1266 : {
1267 0 : session_t *as = (session_t *) session;
1268 : u32 max_burst_sz, sent;
1269 : http_conn_t *hc;
1270 :
1271 0 : hc = http_conn_get_w_thread (as->connection_index, as->thread_index);
1272 0 : if (hc->http_state < HTTP_STATE_WAIT_APP)
1273 : {
1274 0 : if (hc->state != HTTP_CONN_STATE_CLOSED)
1275 0 : clib_warning ("app data req state %u session state %u", hc->http_state,
1276 : hc->state);
1277 0 : svm_fifo_dequeue_drop_all (as->tx_fifo);
1278 0 : return 0;
1279 : }
1280 :
1281 0 : max_burst_sz = sp->max_burst_size * TRANSPORT_PACER_MIN_MSS;
1282 0 : sp->max_burst_size = max_burst_sz;
1283 :
1284 0 : http_req_run_state_machine (hc, sp);
1285 :
1286 0 : if (hc->state == HTTP_CONN_STATE_APP_CLOSED)
1287 : {
1288 0 : if (!svm_fifo_max_dequeue_cons (as->tx_fifo))
1289 0 : http_disconnect_transport (hc);
1290 : }
1291 :
1292 0 : sent = max_burst_sz - sp->max_burst_size;
1293 :
1294 0 : return sent > 0 ? clib_max (sent / TRANSPORT_PACER_MIN_MSS, 1) : 0;
1295 : }
1296 :
1297 : static void
1298 0 : http_transport_get_endpoint (u32 hc_index, u32 thread_index,
1299 : transport_endpoint_t *tep, u8 is_lcl)
1300 : {
1301 0 : http_conn_t *hc = http_conn_get_w_thread (hc_index, thread_index);
1302 : session_t *ts;
1303 :
1304 0 : ts = session_get_from_handle (hc->h_tc_session_handle);
1305 0 : session_get_endpoint (ts, tep, is_lcl);
1306 0 : }
1307 :
1308 : static u8 *
1309 0 : format_http_connection (u8 *s, va_list *args)
1310 : {
1311 0 : http_conn_t *hc = va_arg (*args, http_conn_t *);
1312 : session_t *ts;
1313 :
1314 0 : ts = session_get_from_handle (hc->h_tc_session_handle);
1315 0 : s = format (s, "[%d:%d][H] app_wrk %u ts %d:%d", hc->c_thread_index,
1316 0 : hc->c_s_index, hc->h_pa_wrk_index, ts->thread_index,
1317 : ts->session_index);
1318 :
1319 0 : return s;
1320 : }
1321 :
1322 : static u8 *
1323 0 : format_http_listener (u8 *s, va_list *args)
1324 : {
1325 0 : http_conn_t *lhc = va_arg (*args, http_conn_t *);
1326 : app_listener_t *al;
1327 : session_t *lts;
1328 :
1329 0 : al = app_listener_get_w_handle (lhc->h_tc_session_handle);
1330 0 : lts = app_listener_get_session (al);
1331 0 : s = format (s, "[%d:%d][H] app_wrk %u ts %d:%d", lhc->c_thread_index,
1332 0 : lhc->c_s_index, lhc->h_pa_wrk_index, lts->thread_index,
1333 : lts->session_index);
1334 :
1335 0 : return s;
1336 : }
1337 :
1338 : static u8 *
1339 0 : format_http_conn_state (u8 *s, va_list *args)
1340 : {
1341 0 : http_conn_t *hc = va_arg (*args, http_conn_t *);
1342 :
1343 0 : switch (hc->state)
1344 : {
1345 0 : case HTTP_CONN_STATE_LISTEN:
1346 0 : s = format (s, "LISTEN");
1347 0 : break;
1348 0 : case HTTP_CONN_STATE_CONNECTING:
1349 0 : s = format (s, "CONNECTING");
1350 0 : break;
1351 0 : case HTTP_CONN_STATE_ESTABLISHED:
1352 0 : s = format (s, "ESTABLISHED");
1353 0 : break;
1354 0 : case HTTP_CONN_STATE_TRANSPORT_CLOSED:
1355 0 : s = format (s, "TRANSPORT_CLOSED");
1356 0 : break;
1357 0 : case HTTP_CONN_STATE_APP_CLOSED:
1358 0 : s = format (s, "APP_CLOSED");
1359 0 : break;
1360 0 : case HTTP_CONN_STATE_CLOSED:
1361 0 : s = format (s, "CLOSED");
1362 0 : break;
1363 : }
1364 :
1365 0 : return s;
1366 : }
1367 :
1368 : static u8 *
1369 0 : format_http_transport_connection (u8 *s, va_list *args)
1370 : {
1371 0 : u32 tc_index = va_arg (*args, u32);
1372 0 : u32 thread_index = va_arg (*args, u32);
1373 0 : u32 verbose = va_arg (*args, u32);
1374 : http_conn_t *hc;
1375 :
1376 0 : hc = http_conn_get_w_thread (tc_index, thread_index);
1377 :
1378 0 : s = format (s, "%-" SESSION_CLI_ID_LEN "U", format_http_connection, hc);
1379 0 : if (verbose)
1380 : {
1381 : s =
1382 0 : format (s, "%-" SESSION_CLI_STATE_LEN "U", format_http_conn_state, hc);
1383 0 : if (verbose > 1)
1384 0 : s = format (s, "\n");
1385 : }
1386 :
1387 0 : return s;
1388 : }
1389 :
1390 : static u8 *
1391 0 : format_http_transport_listener (u8 *s, va_list *args)
1392 : {
1393 0 : u32 tc_index = va_arg (*args, u32);
1394 0 : u32 __clib_unused thread_index = va_arg (*args, u32);
1395 0 : u32 __clib_unused verbose = va_arg (*args, u32);
1396 0 : http_conn_t *lhc = http_listener_get (tc_index);
1397 :
1398 0 : s = format (s, "%-" SESSION_CLI_ID_LEN "U", format_http_listener, lhc);
1399 0 : if (verbose)
1400 : s =
1401 0 : format (s, "%-" SESSION_CLI_STATE_LEN "U", format_http_conn_state, lhc);
1402 0 : return s;
1403 : }
1404 :
1405 : static const transport_proto_vft_t http_proto = {
1406 : .enable = http_transport_enable,
1407 : .connect = http_transport_connect,
1408 : .start_listen = http_start_listen,
1409 : .stop_listen = http_stop_listen,
1410 : .close = http_transport_close,
1411 : .custom_tx = http_app_tx_callback,
1412 : .get_connection = http_transport_get_connection,
1413 : .get_listener = http_transport_get_listener,
1414 : .get_transport_endpoint = http_transport_get_endpoint,
1415 : .format_connection = format_http_transport_connection,
1416 : .format_listener = format_http_transport_listener,
1417 : .transport_options = {
1418 : .name = "http",
1419 : .short_name = "H",
1420 : .tx_type = TRANSPORT_TX_INTERNAL,
1421 : .service_type = TRANSPORT_SERVICE_APP,
1422 : },
1423 : };
1424 :
1425 : static clib_error_t *
1426 559 : http_transport_init (vlib_main_t *vm)
1427 : {
1428 559 : http_main_t *hm = &http_main;
1429 :
1430 559 : transport_register_protocol (TRANSPORT_PROTO_HTTP, &http_proto,
1431 : FIB_PROTOCOL_IP4, ~0);
1432 559 : transport_register_protocol (TRANSPORT_PROTO_HTTP, &http_proto,
1433 : FIB_PROTOCOL_IP6, ~0);
1434 :
1435 : /* Default values, configurable via startup conf */
1436 559 : hm->add_seg_size = 256 << 20;
1437 559 : hm->first_seg_size = 32 << 20;
1438 559 : hm->fifo_size = 512 << 10;
1439 :
1440 559 : return 0;
1441 : }
1442 :
1443 1119 : VLIB_INIT_FUNCTION (http_transport_init);
1444 :
1445 : static clib_error_t *
1446 559 : http_config_fn (vlib_main_t *vm, unformat_input_t *input)
1447 : {
1448 559 : http_main_t *hm = &http_main;
1449 : uword mem_sz;
1450 :
1451 559 : while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1452 : {
1453 0 : if (unformat (input, "first-segment-size %U", unformat_memory_size,
1454 : &mem_sz))
1455 : {
1456 0 : hm->first_seg_size = clib_max (mem_sz, 1 << 20);
1457 0 : if (hm->first_seg_size != mem_sz)
1458 0 : clib_warning ("first seg size too small %u", mem_sz);
1459 : }
1460 0 : else if (unformat (input, "add-segment-size %U", unformat_memory_size,
1461 : &mem_sz))
1462 : {
1463 0 : hm->add_seg_size = clib_max (mem_sz, 1 << 20);
1464 0 : if (hm->add_seg_size != mem_sz)
1465 0 : clib_warning ("add seg size too small %u", mem_sz);
1466 : }
1467 0 : else if (unformat (input, "fifo-size %U", unformat_memory_size, &mem_sz))
1468 : {
1469 0 : hm->fifo_size = clib_clamp (mem_sz, 4 << 10, 2 << 30);
1470 0 : if (hm->fifo_size != mem_sz)
1471 0 : clib_warning ("invalid fifo size %lu", mem_sz);
1472 : }
1473 : else
1474 0 : return clib_error_return (0, "unknown input `%U'",
1475 : format_unformat_error, input);
1476 : }
1477 559 : return 0;
1478 : }
1479 :
1480 3386 : VLIB_CONFIG_FUNCTION (http_config_fn, "http");
1481 :
1482 : VLIB_PLUGIN_REGISTER () = {
1483 : .version = VPP_BUILD_VER,
1484 : .description = "Hypertext Transfer Protocol (HTTP)",
1485 : .default_disabled = 0,
1486 : };
1487 :
1488 : /*
1489 : * fd.io coding-style-patch-verification: ON
1490 : *
1491 : * Local Variables:
1492 : * eval: (c-set-style "gnu")
1493 : * End:
1494 : */
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