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->opaque = hc->h_pa_app_api_ctx;
265 0 : as->session_type = session_type_from_proto_and_ip (
266 0 : TRANSPORT_PROTO_HTTP, session_type_is_ip4 (ts->session_type));
267 :
268 0 : app_wrk = app_worker_get (hc->h_pa_wrk_index);
269 0 : if (!app_wrk)
270 : {
271 0 : clib_warning ("no app worker");
272 0 : return -1;
273 : }
274 :
275 0 : if ((rv = app_worker_init_connected (app_wrk, as)))
276 : {
277 : HTTP_DBG (1, "failed to allocate fifos");
278 0 : session_free (as);
279 0 : return rv;
280 : }
281 0 : app_worker_connect_notify (app_wrk, as, err, hc->h_pa_app_api_ctx);
282 0 : hc->h_pa_session_handle = session_handle (as);
283 0 : http_conn_timer_start (hc);
284 :
285 0 : return 0;
286 : }
287 :
288 : static void
289 0 : http_ts_disconnect_callback (session_t *ts)
290 : {
291 : http_conn_t *hc;
292 :
293 0 : hc = http_conn_get_w_thread (ts->opaque, ts->thread_index);
294 :
295 0 : if (hc->state < HTTP_CONN_STATE_TRANSPORT_CLOSED)
296 0 : hc->state = HTTP_CONN_STATE_TRANSPORT_CLOSED;
297 :
298 : /* Nothing more to rx, propagate to app */
299 0 : if (!svm_fifo_max_dequeue_cons (ts->rx_fifo))
300 0 : session_transport_closing_notify (&hc->connection);
301 0 : }
302 :
303 : static void
304 0 : http_ts_reset_callback (session_t *ts)
305 : {
306 : http_conn_t *hc;
307 :
308 0 : hc = http_conn_get_w_thread (ts->opaque, ts->thread_index);
309 :
310 0 : hc->state = HTTP_CONN_STATE_CLOSED;
311 0 : http_buffer_free (&hc->tx_buf);
312 0 : hc->http_state = HTTP_STATE_WAIT_METHOD;
313 0 : session_transport_reset_notify (&hc->connection);
314 :
315 0 : http_disconnect_transport (hc);
316 0 : }
317 :
318 : /**
319 : * http error boilerplate
320 : */
321 : static const char *http_error_template = "HTTP/1.1 %s\r\n"
322 : "Date: %U GMT\r\n"
323 : "Content-Type: text/html\r\n"
324 : "Connection: close\r\n"
325 : "Pragma: no-cache\r\n"
326 : "Content-Length: 0\r\n\r\n";
327 :
328 : static const char *http_redirect_template = "HTTP/1.1 %s\r\n";
329 :
330 : /**
331 : * http response boilerplate
332 : */
333 : static const char *http_response_template = "HTTP/1.1 %s\r\n"
334 : "Date: %U GMT\r\n"
335 : "Expires: %U GMT\r\n"
336 : "Server: VPP Static\r\n"
337 : "Content-Type: %s\r\n"
338 : "Content-Length: %lu\r\n\r\n";
339 :
340 : static const char *http_request_template = "GET %s HTTP/1.1\r\n"
341 : "User-Agent: VPP HTTP client\r\n"
342 : "Accept: */*\r\n";
343 :
344 : static u32
345 0 : send_data (http_conn_t *hc, u8 *data, u32 length, u32 offset)
346 : {
347 0 : const u32 max_burst = 64 << 10;
348 : session_t *ts;
349 : u32 to_send;
350 : int sent;
351 :
352 0 : ts = session_get_from_handle (hc->h_tc_session_handle);
353 :
354 0 : to_send = clib_min (length - offset, max_burst);
355 0 : sent = svm_fifo_enqueue (ts->tx_fifo, to_send, data + offset);
356 :
357 0 : if (sent <= 0)
358 0 : return offset;
359 :
360 0 : if (svm_fifo_set_event (ts->tx_fifo))
361 0 : session_send_io_evt_to_thread (ts->tx_fifo, SESSION_IO_EVT_TX);
362 :
363 0 : return (offset + sent);
364 : }
365 :
366 : static void
367 0 : send_error (http_conn_t *hc, http_status_code_t ec)
368 : {
369 0 : http_main_t *hm = &http_main;
370 : u8 *data;
371 : f64 now;
372 :
373 0 : if (ec >= HTTP_N_STATUS)
374 0 : ec = HTTP_STATUS_INTERNAL_ERROR;
375 :
376 0 : now = clib_timebase_now (&hm->timebase);
377 0 : data = format (0, http_error_template, http_status_code_str[ec],
378 : format_clib_timebase_time, now);
379 0 : send_data (hc, data, vec_len (data), 0);
380 0 : vec_free (data);
381 0 : }
382 :
383 : static int
384 0 : read_http_message (http_conn_t *hc)
385 : {
386 : u32 max_deq, cursize;
387 : session_t *ts;
388 : int n_read;
389 :
390 0 : ts = session_get_from_handle (hc->h_tc_session_handle);
391 :
392 0 : cursize = vec_len (hc->rx_buf);
393 0 : max_deq = svm_fifo_max_dequeue (ts->rx_fifo);
394 0 : if (PREDICT_FALSE (max_deq == 0))
395 0 : return -1;
396 :
397 0 : vec_validate (hc->rx_buf, cursize + max_deq - 1);
398 0 : n_read = svm_fifo_dequeue (ts->rx_fifo, max_deq, hc->rx_buf + cursize);
399 0 : ASSERT (n_read == max_deq);
400 :
401 0 : if (svm_fifo_is_empty (ts->rx_fifo))
402 0 : svm_fifo_unset_event (ts->rx_fifo);
403 :
404 0 : vec_set_len (hc->rx_buf, cursize + n_read);
405 0 : return 0;
406 : }
407 :
408 : static int
409 0 : v_find_index (u8 *vec, u32 offset, char *str)
410 : {
411 0 : int start_index = offset;
412 0 : u32 slen = (u32) strnlen_s_inline (str, 16);
413 0 : u32 vlen = vec_len (vec);
414 :
415 0 : ASSERT (slen > 0);
416 :
417 0 : if (vlen <= slen)
418 0 : return -1;
419 :
420 0 : for (; start_index < (vlen - slen); start_index++)
421 : {
422 0 : if (!memcmp (vec + start_index, str, slen))
423 0 : return start_index;
424 : }
425 :
426 0 : return -1;
427 : }
428 :
429 : /**
430 : * waiting for request method from peer - parse request method and data
431 : */
432 : static http_sm_result_t
433 0 : state_srv_wait_method (http_conn_t *hc, transport_send_params_t *sp)
434 : {
435 : http_status_code_t ec;
436 : app_worker_t *app_wrk;
437 : http_msg_t msg;
438 : session_t *as;
439 : int i, rv;
440 : u32 len;
441 : u8 *buf;
442 :
443 0 : rv = read_http_message (hc);
444 :
445 : /* Nothing yet, wait for data or timer expire */
446 0 : if (rv)
447 0 : return HTTP_SM_STOP;
448 :
449 0 : if (vec_len (hc->rx_buf) < 8)
450 : {
451 0 : ec = HTTP_STATUS_BAD_REQUEST;
452 0 : goto error;
453 : }
454 :
455 0 : if ((i = v_find_index (hc->rx_buf, 0, "GET ")) >= 0)
456 : {
457 0 : hc->method = HTTP_REQ_GET;
458 0 : hc->rx_buf_offset = i + 5;
459 :
460 0 : i = v_find_index (hc->rx_buf, hc->rx_buf_offset, "HTTP");
461 0 : if (i < 0)
462 : {
463 0 : ec = HTTP_STATUS_BAD_REQUEST;
464 0 : goto error;
465 : }
466 :
467 0 : len = i - hc->rx_buf_offset - 1;
468 : }
469 0 : else if ((i = v_find_index (hc->rx_buf, 0, "POST ")) >= 0)
470 : {
471 0 : hc->method = HTTP_REQ_POST;
472 0 : hc->rx_buf_offset = i + 6;
473 0 : len = vec_len (hc->rx_buf) - hc->rx_buf_offset - 1;
474 : }
475 : else
476 : {
477 : HTTP_DBG (0, "Unknown http method");
478 0 : ec = HTTP_STATUS_METHOD_NOT_ALLOWED;
479 0 : goto error;
480 : }
481 :
482 0 : buf = &hc->rx_buf[hc->rx_buf_offset];
483 :
484 0 : msg.type = HTTP_MSG_REQUEST;
485 0 : msg.method_type = hc->method;
486 0 : msg.content_type = HTTP_CONTENT_TEXT_HTML;
487 0 : msg.data.type = HTTP_MSG_DATA_INLINE;
488 0 : msg.data.len = len;
489 :
490 0 : svm_fifo_seg_t segs[2] = { { (u8 *) &msg, sizeof (msg) }, { buf, len } };
491 :
492 0 : as = session_get_from_handle (hc->h_pa_session_handle);
493 0 : rv = svm_fifo_enqueue_segments (as->rx_fifo, segs, 2, 0 /* allow partial */);
494 0 : if (rv < 0 || rv != sizeof (msg) + len)
495 : {
496 0 : clib_warning ("failed app enqueue");
497 : /* This should not happen as we only handle 1 request per session,
498 : * and fifo is allocated, but going forward we should consider
499 : * rescheduling */
500 0 : return HTTP_SM_ERROR;
501 : }
502 :
503 0 : vec_free (hc->rx_buf);
504 0 : hc->http_state = HTTP_STATE_WAIT_APP;
505 :
506 0 : app_wrk = app_worker_get_if_valid (as->app_wrk_index);
507 0 : if (app_wrk)
508 0 : app_worker_rx_notify (app_wrk, as);
509 :
510 0 : return HTTP_SM_STOP;
511 :
512 0 : error:
513 :
514 0 : send_error (hc, ec);
515 0 : session_transport_closing_notify (&hc->connection);
516 0 : http_disconnect_transport (hc);
517 :
518 0 : return HTTP_SM_ERROR;
519 : }
520 :
521 : /**
522 : * waiting for data from app
523 : */
524 : static http_sm_result_t
525 0 : state_srv_wait_app (http_conn_t *hc, transport_send_params_t *sp)
526 : {
527 0 : http_main_t *hm = &http_main;
528 : http_status_code_t ec;
529 : http_msg_t msg;
530 : session_t *as;
531 : u8 *header;
532 : u32 offset;
533 : f64 now;
534 : int rv;
535 :
536 0 : as = session_get_from_handle (hc->h_pa_session_handle);
537 :
538 0 : rv = svm_fifo_dequeue (as->tx_fifo, sizeof (msg), (u8 *) &msg);
539 0 : ASSERT (rv == sizeof (msg));
540 :
541 0 : if (msg.type != HTTP_MSG_REPLY || msg.data.type > HTTP_MSG_DATA_PTR)
542 : {
543 0 : clib_warning ("unexpected msg type from app %u", msg.type);
544 0 : ec = HTTP_STATUS_INTERNAL_ERROR;
545 0 : goto error;
546 : }
547 :
548 0 : ec = msg.code;
549 :
550 0 : switch (msg.code)
551 : {
552 0 : case HTTP_STATUS_OK:
553 : case HTTP_STATUS_MOVED:
554 0 : break;
555 0 : default:
556 0 : goto error;
557 : }
558 :
559 0 : http_buffer_init (&hc->tx_buf, msg_to_buf_type[msg.data.type], as->tx_fifo,
560 : msg.data.len);
561 :
562 : /*
563 : * Add headers. For now:
564 : * - current time
565 : * - expiration time
566 : * - content type
567 : * - data length
568 : */
569 0 : now = clib_timebase_now (&hm->timebase);
570 :
571 0 : switch (msg.code)
572 : {
573 0 : case HTTP_STATUS_OK:
574 0 : header =
575 0 : format (0, http_response_template, http_status_code_str[msg.code],
576 : /* Date */
577 : format_clib_timebase_time, now,
578 : /* Expires */
579 : format_clib_timebase_time, now + 600.0,
580 : /* Content type */
581 0 : http_content_type_str[msg.content_type],
582 : /* Length */
583 : msg.data.len);
584 0 : break;
585 0 : case HTTP_STATUS_MOVED:
586 0 : header =
587 0 : format (0, http_redirect_template, http_status_code_str[msg.code]);
588 : /* Location: http(s)://new-place already queued up as data */
589 0 : break;
590 0 : default:
591 0 : goto error;
592 : }
593 :
594 0 : offset = send_data (hc, header, vec_len (header), 0);
595 0 : if (offset != vec_len (header))
596 : {
597 0 : clib_warning ("couldn't send response header!");
598 0 : ec = HTTP_STATUS_INTERNAL_ERROR;
599 0 : goto error;
600 : }
601 0 : vec_free (header);
602 :
603 : /* Start sending the actual data */
604 0 : hc->http_state = HTTP_STATE_IO_MORE_DATA;
605 :
606 0 : ASSERT (sp->max_burst_size >= offset);
607 0 : sp->max_burst_size -= offset;
608 :
609 0 : return HTTP_SM_CONTINUE;
610 :
611 0 : error:
612 :
613 0 : send_error (hc, ec);
614 0 : hc->http_state = HTTP_STATE_WAIT_METHOD;
615 0 : session_transport_closing_notify (&hc->connection);
616 0 : http_disconnect_transport (hc);
617 :
618 0 : return HTTP_SM_STOP;
619 : }
620 :
621 : static http_sm_result_t
622 0 : state_srv_send_more_data (http_conn_t *hc, transport_send_params_t *sp)
623 : {
624 0 : u32 max_send = 64 << 10, n_segs;
625 0 : http_buffer_t *hb = &hc->tx_buf;
626 : svm_fifo_seg_t *seg;
627 : session_t *ts;
628 0 : int sent = 0;
629 :
630 0 : max_send = clib_min (max_send, sp->max_burst_size);
631 0 : ts = session_get_from_handle (hc->h_tc_session_handle);
632 0 : if ((seg = http_buffer_get_segs (hb, max_send, &n_segs)))
633 0 : sent = svm_fifo_enqueue_segments (ts->tx_fifo, seg, n_segs,
634 : 1 /* allow partial */);
635 :
636 0 : if (sent > 0)
637 : {
638 : /* Ask scheduler to notify app of deq event if needed */
639 0 : sp->bytes_dequeued += http_buffer_drain (hb, sent);
640 0 : sp->max_burst_size -= sent;
641 : }
642 :
643 : /* Not finished sending all data */
644 0 : if (!http_buffer_is_drained (hb))
645 : {
646 0 : if (sent && svm_fifo_set_event (ts->tx_fifo))
647 0 : session_send_io_evt_to_thread (ts->tx_fifo, SESSION_IO_EVT_TX);
648 :
649 0 : if (svm_fifo_max_enqueue (ts->tx_fifo) < HTTP_FIFO_THRESH)
650 : {
651 : /* Deschedule http session and wait for deq notification if
652 : * underlying ts tx fifo almost full */
653 0 : svm_fifo_add_want_deq_ntf (ts->tx_fifo, SVM_FIFO_WANT_DEQ_NOTIF);
654 0 : transport_connection_deschedule (&hc->connection);
655 0 : sp->flags |= TRANSPORT_SND_F_DESCHED;
656 : }
657 : }
658 : else
659 : {
660 0 : if (sent && svm_fifo_set_event (ts->tx_fifo))
661 0 : session_send_io_evt_to_thread (ts->tx_fifo, SESSION_IO_EVT_TX_FLUSH);
662 :
663 : /* Finished transaction, back to HTTP_STATE_WAIT_METHOD */
664 0 : hc->http_state = HTTP_STATE_WAIT_METHOD;
665 0 : http_buffer_free (&hc->tx_buf);
666 : }
667 :
668 0 : return HTTP_SM_STOP;
669 : }
670 :
671 : static int
672 0 : parse_http_header (http_conn_t *hc, int *content_length)
673 : {
674 : unformat_input_t input;
675 : int i, len;
676 : u8 *line;
677 :
678 0 : if ((i = v_find_index (hc->rx_buf, hc->rx_buf_offset, "200 OK") < 0))
679 : {
680 0 : clib_warning ("bad response code");
681 0 : return -1;
682 : }
683 :
684 0 : i = v_find_index (hc->rx_buf, hc->rx_buf_offset, CONTENT_LEN_STR);
685 0 : if (i < 0)
686 : {
687 0 : clib_warning ("cannot find '%s' in the header!", CONTENT_LEN_STR);
688 0 : return -1;
689 : }
690 :
691 0 : hc->rx_buf_offset = i;
692 :
693 0 : i = v_find_index (hc->rx_buf, hc->rx_buf_offset, "\n");
694 0 : if (i < 0)
695 : {
696 0 : clib_warning ("end of line missing; incomplete data");
697 0 : return -1;
698 : }
699 :
700 0 : len = i - hc->rx_buf_offset;
701 0 : line = vec_new (u8, len);
702 0 : clib_memcpy (line, hc->rx_buf + hc->rx_buf_offset, len);
703 :
704 0 : unformat_init_vector (&input, line);
705 0 : if (!unformat (&input, CONTENT_LEN_STR "%d", content_length))
706 : {
707 0 : clib_warning ("failed to unformat content length!");
708 0 : return -1;
709 : }
710 0 : unformat_free (&input);
711 :
712 : /* skip rest of the header */
713 0 : hc->rx_buf_offset += len;
714 0 : i = v_find_index (hc->rx_buf, hc->rx_buf_offset, "<html>");
715 0 : if (i < 0)
716 : {
717 0 : clib_warning ("<html> tag not found");
718 0 : return -1;
719 : }
720 0 : hc->rx_buf_offset = i;
721 :
722 0 : return 0;
723 : }
724 :
725 : static int
726 0 : state_cln_wait_method (http_conn_t *hc, transport_send_params_t *sp)
727 : {
728 : session_t *as;
729 : http_msg_t msg;
730 : app_worker_t *app_wrk;
731 : int rv, content_length;
732 :
733 0 : rv = read_http_message (hc);
734 0 : if (rv)
735 0 : return HTTP_SM_STOP;
736 :
737 0 : msg.type = HTTP_MSG_REPLY;
738 0 : msg.content_type = HTTP_CONTENT_TEXT_HTML;
739 0 : msg.code = HTTP_STATUS_OK;
740 0 : msg.data.type = HTTP_MSG_DATA_INLINE;
741 0 : msg.data.len = 0;
742 :
743 0 : rv = parse_http_header (hc, &content_length);
744 0 : if (rv)
745 : {
746 0 : clib_warning ("failed to parse http reply");
747 0 : session_transport_closing_notify (&hc->connection);
748 0 : http_disconnect_transport (hc);
749 0 : return -1;
750 : }
751 :
752 0 : msg.data.len = content_length;
753 0 : u32 dlen = vec_len (hc->rx_buf) - hc->rx_buf_offset;
754 0 : as = session_get_from_handle (hc->h_pa_session_handle);
755 0 : svm_fifo_seg_t segs[2] = { { (u8 *) &msg, sizeof (msg) },
756 0 : { &hc->rx_buf[hc->rx_buf_offset], dlen } };
757 :
758 0 : rv = svm_fifo_enqueue_segments (as->rx_fifo, segs, 2, 0 /* allow partial */);
759 0 : if (rv < 0)
760 : {
761 0 : clib_warning ("error enqueue");
762 0 : return HTTP_SM_ERROR;
763 : }
764 0 : hc->rx_buf_offset += dlen;
765 0 : hc->http_state = HTTP_STATE_IO_MORE_DATA;
766 0 : hc->to_recv = content_length - dlen;
767 :
768 0 : if (hc->rx_buf_offset == vec_len (hc->rx_buf))
769 : {
770 0 : vec_reset_length (hc->rx_buf);
771 0 : hc->rx_buf_offset = 0;
772 : }
773 :
774 0 : if (hc->to_recv == 0)
775 : {
776 0 : hc->rx_buf_offset = 0;
777 0 : vec_reset_length (hc->rx_buf);
778 0 : hc->http_state = HTTP_STATE_WAIT_APP;
779 : }
780 :
781 0 : app_wrk = app_worker_get_if_valid (as->app_wrk_index);
782 0 : app_worker_rx_notify (app_wrk, as);
783 0 : return HTTP_SM_STOP;
784 : }
785 :
786 : static int
787 0 : cln_drain_rx_buf (http_conn_t *hc, session_t *ts, session_t *as)
788 : {
789 : app_worker_t *app_wrk;
790 0 : u32 max_enq, n_enq, dlen = vec_len (hc->rx_buf) - hc->rx_buf_offset;
791 : int rv;
792 :
793 0 : max_enq = svm_fifo_max_enqueue (as->rx_fifo);
794 0 : n_enq = clib_min (max_enq, dlen);
795 0 : rv = svm_fifo_enqueue (as->rx_fifo, n_enq, &hc->rx_buf[hc->rx_buf_offset]);
796 0 : if (rv < 0)
797 : {
798 0 : clib_warning ("enqueue failed");
799 0 : return -1;
800 : }
801 :
802 0 : hc->rx_buf_offset += rv;
803 :
804 0 : if (hc->rx_buf_offset >= vec_len (hc->rx_buf))
805 : {
806 0 : vec_reset_length (hc->rx_buf);
807 0 : hc->rx_buf_offset = 0;
808 : }
809 :
810 0 : app_wrk = app_worker_get_if_valid (as->app_wrk_index);
811 0 : ASSERT (app_wrk);
812 :
813 0 : app_worker_rx_notify (app_wrk, as);
814 0 : return 1;
815 : }
816 :
817 : static http_sm_result_t
818 0 : state_cln_recv_more_data (http_conn_t *hc, transport_send_params_t *sp)
819 : {
820 : session_t *as;
821 : u32 max_deq;
822 : session_t *ts;
823 : int n_read, rv;
824 :
825 0 : as = session_get_from_handle (hc->h_pa_session_handle);
826 0 : ts = session_get_from_handle (hc->h_tc_session_handle);
827 :
828 0 : u32 dlen = vec_len (hc->rx_buf) - hc->rx_buf_offset;
829 0 : if (dlen)
830 : {
831 0 : rv = cln_drain_rx_buf (hc, ts, as);
832 0 : if (rv < 0)
833 : {
834 0 : clib_warning ("drain rx error!");
835 0 : return HTTP_SM_ERROR;
836 : }
837 0 : goto maybe_reschedule;
838 : }
839 :
840 0 : if (hc->to_recv == 0)
841 : {
842 0 : ASSERT (vec_len (hc->rx_buf) == 0);
843 0 : ASSERT (hc->rx_buf_offset == 0);
844 0 : hc->http_state = HTTP_STATE_WAIT_APP;
845 0 : return HTTP_SM_STOP;
846 : }
847 :
848 0 : max_deq = svm_fifo_max_dequeue (ts->rx_fifo);
849 0 : if (max_deq == 0)
850 0 : return HTTP_SM_STOP;
851 :
852 0 : ASSERT (vec_len (hc->rx_buf) == 0);
853 0 : ASSERT (hc->rx_buf_offset == 0);
854 :
855 0 : vec_validate (hc->rx_buf, max_deq - 1);
856 0 : n_read = svm_fifo_dequeue (ts->rx_fifo, max_deq, hc->rx_buf);
857 0 : ASSERT (n_read == max_deq);
858 :
859 0 : if (svm_fifo_is_empty (ts->rx_fifo))
860 0 : svm_fifo_unset_event (ts->rx_fifo);
861 :
862 0 : hc->to_recv -= n_read;
863 0 : vec_set_len (hc->rx_buf, max_deq);
864 :
865 0 : maybe_reschedule:
866 0 : if (hc->rx_buf_offset < vec_len (hc->rx_buf) ||
867 0 : svm_fifo_max_dequeue_cons (ts->rx_fifo))
868 : {
869 : /* TODO is the flag really needed? */
870 0 : if (svm_fifo_set_event (ts->rx_fifo))
871 0 : session_enqueue_notify (ts);
872 : }
873 0 : return HTTP_SM_CONTINUE;
874 : }
875 :
876 : static http_sm_result_t
877 0 : state_cln_wait_app (http_conn_t *hc, transport_send_params_t *sp)
878 : {
879 : session_t *as;
880 : http_msg_t msg;
881 : http_status_code_t ec;
882 0 : u8 *buf = 0, *request;
883 : u32 offset;
884 : int rv;
885 :
886 0 : as = session_get_from_handle (hc->h_pa_session_handle);
887 0 : rv = svm_fifo_dequeue (as->tx_fifo, sizeof (msg), (u8 *) &msg);
888 0 : ASSERT (rv == sizeof (msg));
889 0 : if (msg.type != HTTP_MSG_REQUEST || msg.data.type > HTTP_MSG_DATA_PTR)
890 : {
891 0 : clib_warning ("unexpected msg type from app %u", msg.type);
892 0 : ec = HTTP_STATUS_INTERNAL_ERROR;
893 0 : goto error;
894 : }
895 :
896 0 : vec_validate (buf, msg.data.len - 1);
897 0 : rv = svm_fifo_dequeue (as->tx_fifo, msg.data.len, buf);
898 0 : ASSERT (rv == msg.data.len);
899 :
900 0 : request = format (0, http_request_template, buf);
901 0 : offset = send_data (hc, request, vec_len (request), 0);
902 0 : if (offset != vec_len (request))
903 : {
904 0 : clib_warning ("sending request failed!");
905 0 : ec = HTTP_STATUS_INTERNAL_ERROR;
906 0 : goto error;
907 : }
908 :
909 0 : hc->http_state = HTTP_STATE_WAIT_METHOD;
910 :
911 0 : vec_free (buf);
912 0 : vec_free (request);
913 :
914 0 : return HTTP_SM_CONTINUE;
915 :
916 0 : error:
917 0 : send_error (hc, ec);
918 0 : session_transport_closing_notify (&hc->connection);
919 0 : http_disconnect_transport (hc);
920 0 : return HTTP_SM_STOP;
921 : }
922 :
923 : typedef http_sm_result_t (*http_sm_handler) (http_conn_t *,
924 : transport_send_params_t *sp);
925 :
926 : static http_sm_handler srv_state_funcs[HTTP_N_STATES] = {
927 : /* Waiting for GET, POST, etc. */
928 : state_srv_wait_method,
929 : /* Wait for data from app */
930 : state_srv_wait_app,
931 : /* Send more data */
932 : state_srv_send_more_data,
933 : };
934 :
935 : static http_sm_handler cln_state_funcs[HTTP_N_STATES] = {
936 : /* wait for reply */
937 : state_cln_wait_method,
938 : /* wait for data from app */
939 : state_cln_wait_app,
940 : /* receive more data */
941 : state_cln_recv_more_data,
942 : };
943 :
944 : static void
945 0 : http_req_run_state_machine (http_conn_t *hc, transport_send_params_t *sp)
946 : {
947 : http_sm_result_t res;
948 0 : http_sm_handler *state_fn =
949 0 : hc->is_client ? cln_state_funcs : srv_state_funcs;
950 : do
951 : {
952 0 : res = state_fn[hc->http_state](hc, sp);
953 0 : if (res == HTTP_SM_ERROR)
954 0 : return;
955 : }
956 0 : while (res == HTTP_SM_CONTINUE);
957 :
958 : /* Reset the session expiration timer */
959 0 : http_conn_timer_update (hc);
960 : }
961 :
962 : static int
963 0 : http_ts_server_rx_callback (session_t *ts, http_conn_t *hc)
964 : {
965 0 : if (hc->http_state != HTTP_STATE_WAIT_METHOD)
966 : {
967 0 : clib_warning ("tcp data in req state %u", hc->http_state);
968 0 : return 0;
969 : }
970 :
971 0 : http_req_run_state_machine (hc, 0);
972 :
973 0 : if (hc->state == HTTP_CONN_STATE_TRANSPORT_CLOSED)
974 : {
975 0 : if (!svm_fifo_max_dequeue_cons (ts->rx_fifo))
976 0 : session_transport_closing_notify (&hc->connection);
977 : }
978 0 : return 0;
979 : }
980 :
981 : static int
982 0 : http_ts_client_rx_callback (session_t *ts, http_conn_t *hc)
983 : {
984 0 : if (hc->http_state != HTTP_STATE_WAIT_METHOD &&
985 0 : hc->http_state != HTTP_STATE_IO_MORE_DATA)
986 : {
987 0 : clib_warning ("http in unexpected state %d (ts %d)", hc->http_state,
988 : ts->session_index);
989 0 : return 0;
990 : }
991 :
992 0 : http_req_run_state_machine (hc, 0);
993 :
994 0 : if (hc->state == HTTP_CONN_STATE_TRANSPORT_CLOSED)
995 : {
996 0 : if (!svm_fifo_max_dequeue_cons (ts->rx_fifo))
997 0 : session_transport_closing_notify (&hc->connection);
998 : }
999 0 : return 0;
1000 : }
1001 :
1002 : static int
1003 0 : http_ts_rx_callback (session_t *ts)
1004 : {
1005 : http_conn_t *hc;
1006 :
1007 0 : hc = http_conn_get_w_thread (ts->opaque, ts->thread_index);
1008 0 : if (hc->is_client)
1009 0 : return http_ts_client_rx_callback (ts, hc);
1010 0 : return http_ts_server_rx_callback (ts, hc);
1011 : }
1012 :
1013 : int
1014 0 : http_ts_builtin_tx_callback (session_t *ts)
1015 : {
1016 : http_conn_t *hc;
1017 :
1018 0 : hc = http_conn_get_w_thread (ts->opaque, ts->thread_index);
1019 0 : transport_connection_reschedule (&hc->connection);
1020 :
1021 0 : return 0;
1022 : }
1023 :
1024 : static void
1025 0 : http_ts_cleanup_callback (session_t *ts, session_cleanup_ntf_t ntf)
1026 : {
1027 : http_conn_t *hc;
1028 :
1029 0 : if (ntf == SESSION_CLEANUP_TRANSPORT)
1030 0 : return;
1031 :
1032 0 : hc = http_conn_get_w_thread (ts->opaque, ts->thread_index);
1033 0 : if (!hc)
1034 : {
1035 0 : clib_warning ("no http connection for %u", ts->session_index);
1036 0 : return;
1037 : }
1038 :
1039 0 : vec_free (hc->rx_buf);
1040 :
1041 0 : http_buffer_free (&hc->tx_buf);
1042 0 : http_conn_timer_stop (hc);
1043 :
1044 0 : session_transport_delete_notify (&hc->connection);
1045 0 : http_conn_free (hc);
1046 : }
1047 :
1048 : int
1049 3 : http_add_segment_callback (u32 client_index, u64 segment_handle)
1050 : {
1051 : /* No-op for builtin */
1052 3 : return 0;
1053 : }
1054 :
1055 : int
1056 0 : http_del_segment_callback (u32 client_index, u64 segment_handle)
1057 : {
1058 0 : return 0;
1059 : }
1060 :
1061 : static session_cb_vft_t http_app_cb_vft = {
1062 : .session_accept_callback = http_ts_accept_callback,
1063 : .session_disconnect_callback = http_ts_disconnect_callback,
1064 : .session_connected_callback = http_ts_connected_callback,
1065 : .session_reset_callback = http_ts_reset_callback,
1066 : .session_cleanup_callback = http_ts_cleanup_callback,
1067 : .add_segment_callback = http_add_segment_callback,
1068 : .del_segment_callback = http_del_segment_callback,
1069 : .builtin_app_rx_callback = http_ts_rx_callback,
1070 : .builtin_app_tx_callback = http_ts_builtin_tx_callback,
1071 : };
1072 :
1073 : static clib_error_t *
1074 57 : http_transport_enable (vlib_main_t *vm, u8 is_en)
1075 : {
1076 57 : vnet_app_detach_args_t _da, *da = &_da;
1077 57 : vnet_app_attach_args_t _a, *a = &_a;
1078 : u64 options[APP_OPTIONS_N_OPTIONS];
1079 57 : http_main_t *hm = &http_main;
1080 :
1081 57 : if (!is_en)
1082 : {
1083 8 : da->app_index = hm->app_index;
1084 8 : da->api_client_index = APP_INVALID_INDEX;
1085 8 : vnet_application_detach (da);
1086 8 : return 0;
1087 : }
1088 :
1089 49 : vec_validate (hm->wrk, vlib_num_workers ());
1090 :
1091 49 : clib_memset (a, 0, sizeof (*a));
1092 49 : clib_memset (options, 0, sizeof (options));
1093 :
1094 49 : a->session_cb_vft = &http_app_cb_vft;
1095 49 : a->api_client_index = APP_INVALID_INDEX;
1096 49 : a->options = options;
1097 49 : a->name = format (0, "http");
1098 49 : a->options[APP_OPTIONS_SEGMENT_SIZE] = hm->first_seg_size;
1099 49 : a->options[APP_OPTIONS_ADD_SEGMENT_SIZE] = hm->add_seg_size;
1100 49 : a->options[APP_OPTIONS_RX_FIFO_SIZE] = hm->fifo_size;
1101 49 : a->options[APP_OPTIONS_TX_FIFO_SIZE] = hm->fifo_size;
1102 49 : a->options[APP_OPTIONS_FLAGS] = APP_OPTIONS_FLAGS_IS_BUILTIN;
1103 49 : a->options[APP_OPTIONS_FLAGS] |= APP_OPTIONS_FLAGS_USE_GLOBAL_SCOPE;
1104 49 : a->options[APP_OPTIONS_FLAGS] |= APP_OPTIONS_FLAGS_IS_TRANSPORT_APP;
1105 :
1106 49 : if (vnet_application_attach (a))
1107 0 : return clib_error_return (0, "failed to attach http app");
1108 :
1109 49 : hm->app_index = a->app_index;
1110 49 : vec_free (a->name);
1111 :
1112 49 : clib_timebase_init (&hm->timebase, 0 /* GMT */, CLIB_TIMEBASE_DAYLIGHT_NONE,
1113 : &vm->clib_time /* share the system clock */);
1114 :
1115 49 : http_timers_init (vm, http_conn_timeout_cb);
1116 :
1117 49 : return 0;
1118 : }
1119 :
1120 : static int
1121 0 : http_transport_connect (transport_endpoint_cfg_t *tep)
1122 : {
1123 0 : vnet_connect_args_t _cargs, *cargs = &_cargs;
1124 0 : http_main_t *hm = &http_main;
1125 0 : session_endpoint_cfg_t *sep = (session_endpoint_cfg_t *) tep;
1126 : application_t *app;
1127 : http_conn_t *hc;
1128 : int error;
1129 : u32 hc_index;
1130 0 : app_worker_t *app_wrk = app_worker_get (sep->app_wrk_index);
1131 :
1132 0 : clib_memset (cargs, 0, sizeof (*cargs));
1133 0 : clib_memcpy (&cargs->sep_ext, sep, sizeof (session_endpoint_cfg_t));
1134 0 : cargs->sep.transport_proto = TRANSPORT_PROTO_TCP;
1135 0 : cargs->app_index = hm->app_index;
1136 0 : app = application_get (app_wrk->app_index);
1137 0 : cargs->sep_ext.ns_index = app->ns_index;
1138 :
1139 0 : hc_index = http_conn_alloc_w_thread (0 /* ts->thread_index */);
1140 0 : hc = http_conn_get_w_thread (hc_index, 0);
1141 0 : hc->h_pa_wrk_index = sep->app_wrk_index;
1142 0 : hc->h_pa_app_api_ctx = sep->opaque;
1143 0 : hc->is_client = 1;
1144 0 : hc->state = HTTP_CONN_STATE_CONNECTING;
1145 0 : cargs->api_context = hc_index;
1146 :
1147 0 : if ((error = vnet_connect (cargs)))
1148 0 : return error;
1149 :
1150 0 : return 0;
1151 : }
1152 :
1153 : static u32
1154 3 : http_start_listen (u32 app_listener_index, transport_endpoint_cfg_t *tep)
1155 : {
1156 3 : vnet_listen_args_t _args = {}, *args = &_args;
1157 : session_t *ts_listener, *app_listener;
1158 3 : http_main_t *hm = &http_main;
1159 : session_endpoint_cfg_t *sep;
1160 : app_worker_t *app_wrk;
1161 : transport_proto_t tp;
1162 : app_listener_t *al;
1163 : application_t *app;
1164 : http_conn_t *lhc;
1165 : u32 lhc_index;
1166 :
1167 3 : sep = (session_endpoint_cfg_t *) tep;
1168 :
1169 3 : app_wrk = app_worker_get (sep->app_wrk_index);
1170 3 : app = application_get (app_wrk->app_index);
1171 :
1172 3 : args->app_index = hm->app_index;
1173 3 : args->sep_ext = *sep;
1174 3 : args->sep_ext.ns_index = app->ns_index;
1175 3 : tp = sep->ext_cfg ? TRANSPORT_PROTO_TLS : TRANSPORT_PROTO_TCP;
1176 3 : args->sep_ext.transport_proto = tp;
1177 :
1178 3 : if (vnet_listen (args))
1179 0 : return SESSION_INVALID_INDEX;
1180 :
1181 3 : lhc_index = http_listener_alloc ();
1182 3 : lhc = http_listener_get (lhc_index);
1183 :
1184 : /* Grab transport connection listener and link to http listener */
1185 3 : lhc->h_tc_session_handle = args->handle;
1186 3 : al = app_listener_get_w_handle (lhc->h_tc_session_handle);
1187 3 : ts_listener = app_listener_get_session (al);
1188 3 : ts_listener->opaque = lhc_index;
1189 :
1190 : /* Grab application listener and link to http listener */
1191 3 : app_listener = listen_session_get (app_listener_index);
1192 3 : lhc->h_pa_wrk_index = sep->app_wrk_index;
1193 3 : lhc->h_pa_session_handle = listen_session_get_handle (app_listener);
1194 3 : lhc->c_s_index = app_listener_index;
1195 3 : lhc->c_flags |= TRANSPORT_CONNECTION_F_NO_LOOKUP;
1196 :
1197 3 : return lhc_index;
1198 : }
1199 :
1200 : static u32
1201 0 : http_stop_listen (u32 listener_index)
1202 : {
1203 : http_conn_t *lhc;
1204 : int rv;
1205 :
1206 0 : lhc = http_listener_get (listener_index);
1207 :
1208 0 : vnet_unlisten_args_t a = {
1209 0 : .handle = lhc->h_tc_session_handle,
1210 0 : .app_index = http_main.app_index,
1211 : .wrk_map_index = 0 /* default wrk */
1212 : };
1213 :
1214 0 : if ((rv = vnet_unlisten (&a)))
1215 0 : clib_warning ("unlisten returned %d", rv);
1216 :
1217 0 : http_listener_free (lhc);
1218 :
1219 0 : return 0;
1220 : }
1221 :
1222 : static void
1223 0 : http_transport_close (u32 hc_index, u32 thread_index)
1224 : {
1225 : session_t *as;
1226 : http_conn_t *hc;
1227 :
1228 : HTTP_DBG (1, "App disconnecting %x", hc_index);
1229 :
1230 0 : hc = http_conn_get_w_thread (hc_index, thread_index);
1231 0 : if (hc->state == HTTP_CONN_STATE_CONNECTING)
1232 : {
1233 0 : hc->state = HTTP_CONN_STATE_APP_CLOSED;
1234 0 : http_disconnect_transport (hc);
1235 0 : return;
1236 : }
1237 :
1238 0 : as = session_get_from_handle (hc->h_pa_session_handle);
1239 :
1240 : /* Nothing more to send, confirm close */
1241 0 : if (!svm_fifo_max_dequeue_cons (as->tx_fifo))
1242 : {
1243 0 : session_transport_closed_notify (&hc->connection);
1244 0 : http_disconnect_transport (hc);
1245 : }
1246 : else
1247 : {
1248 : /* Wait for all data to be written to ts */
1249 0 : hc->state = HTTP_CONN_STATE_APP_CLOSED;
1250 : }
1251 : }
1252 :
1253 : static transport_connection_t *
1254 0 : http_transport_get_connection (u32 hc_index, u32 thread_index)
1255 : {
1256 0 : http_conn_t *hc = http_conn_get_w_thread (hc_index, thread_index);
1257 0 : return &hc->connection;
1258 : }
1259 :
1260 : static transport_connection_t *
1261 6 : http_transport_get_listener (u32 listener_index)
1262 : {
1263 6 : http_conn_t *lhc = http_listener_get (listener_index);
1264 6 : return &lhc->connection;
1265 : }
1266 :
1267 : static int
1268 0 : http_app_tx_callback (void *session, transport_send_params_t *sp)
1269 : {
1270 0 : session_t *as = (session_t *) session;
1271 : u32 max_burst_sz, sent;
1272 : http_conn_t *hc;
1273 :
1274 0 : hc = http_conn_get_w_thread (as->connection_index, as->thread_index);
1275 0 : if (hc->http_state < HTTP_STATE_WAIT_APP)
1276 : {
1277 0 : if (hc->state != HTTP_CONN_STATE_CLOSED)
1278 0 : clib_warning ("app data req state %u session state %u", hc->http_state,
1279 : hc->state);
1280 0 : svm_fifo_dequeue_drop_all (as->tx_fifo);
1281 0 : return 0;
1282 : }
1283 :
1284 0 : max_burst_sz = sp->max_burst_size * TRANSPORT_PACER_MIN_MSS;
1285 0 : sp->max_burst_size = max_burst_sz;
1286 :
1287 0 : http_req_run_state_machine (hc, sp);
1288 :
1289 0 : if (hc->state == HTTP_CONN_STATE_APP_CLOSED)
1290 : {
1291 0 : if (!svm_fifo_max_dequeue_cons (as->tx_fifo))
1292 0 : http_disconnect_transport (hc);
1293 : }
1294 :
1295 0 : sent = max_burst_sz - sp->max_burst_size;
1296 :
1297 0 : return sent > 0 ? clib_max (sent / TRANSPORT_PACER_MIN_MSS, 1) : 0;
1298 : }
1299 :
1300 : static void
1301 0 : http_transport_get_endpoint (u32 hc_index, u32 thread_index,
1302 : transport_endpoint_t *tep, u8 is_lcl)
1303 : {
1304 0 : http_conn_t *hc = http_conn_get_w_thread (hc_index, thread_index);
1305 : session_t *ts;
1306 :
1307 0 : ts = session_get_from_handle (hc->h_tc_session_handle);
1308 0 : session_get_endpoint (ts, tep, is_lcl);
1309 0 : }
1310 :
1311 : static u8 *
1312 0 : format_http_connection (u8 *s, va_list *args)
1313 : {
1314 0 : http_conn_t *hc = va_arg (*args, http_conn_t *);
1315 : session_t *ts;
1316 :
1317 0 : ts = session_get_from_handle (hc->h_tc_session_handle);
1318 0 : s = format (s, "[%d:%d][H] app_wrk %u ts %d:%d", hc->c_thread_index,
1319 0 : hc->c_s_index, hc->h_pa_wrk_index, ts->thread_index,
1320 : ts->session_index);
1321 :
1322 0 : return s;
1323 : }
1324 :
1325 : static u8 *
1326 0 : format_http_listener (u8 *s, va_list *args)
1327 : {
1328 0 : http_conn_t *lhc = va_arg (*args, http_conn_t *);
1329 : app_listener_t *al;
1330 : session_t *lts;
1331 :
1332 0 : al = app_listener_get_w_handle (lhc->h_tc_session_handle);
1333 0 : lts = app_listener_get_session (al);
1334 0 : s = format (s, "[%d:%d][H] app_wrk %u ts %d:%d", lhc->c_thread_index,
1335 0 : lhc->c_s_index, lhc->h_pa_wrk_index, lts->thread_index,
1336 : lts->session_index);
1337 :
1338 0 : return s;
1339 : }
1340 :
1341 : static u8 *
1342 0 : format_http_conn_state (u8 *s, va_list *args)
1343 : {
1344 0 : http_conn_t *hc = va_arg (*args, http_conn_t *);
1345 :
1346 0 : switch (hc->state)
1347 : {
1348 0 : case HTTP_CONN_STATE_LISTEN:
1349 0 : s = format (s, "LISTEN");
1350 0 : break;
1351 0 : case HTTP_CONN_STATE_CONNECTING:
1352 0 : s = format (s, "CONNECTING");
1353 0 : break;
1354 0 : case HTTP_CONN_STATE_ESTABLISHED:
1355 0 : s = format (s, "ESTABLISHED");
1356 0 : break;
1357 0 : case HTTP_CONN_STATE_TRANSPORT_CLOSED:
1358 0 : s = format (s, "TRANSPORT_CLOSED");
1359 0 : break;
1360 0 : case HTTP_CONN_STATE_APP_CLOSED:
1361 0 : s = format (s, "APP_CLOSED");
1362 0 : break;
1363 0 : case HTTP_CONN_STATE_CLOSED:
1364 0 : s = format (s, "CLOSED");
1365 0 : break;
1366 : }
1367 :
1368 0 : return s;
1369 : }
1370 :
1371 : static u8 *
1372 0 : format_http_transport_connection (u8 *s, va_list *args)
1373 : {
1374 0 : u32 tc_index = va_arg (*args, u32);
1375 0 : u32 thread_index = va_arg (*args, u32);
1376 0 : u32 verbose = va_arg (*args, u32);
1377 : http_conn_t *hc;
1378 :
1379 0 : hc = http_conn_get_w_thread (tc_index, thread_index);
1380 :
1381 0 : s = format (s, "%-" SESSION_CLI_ID_LEN "U", format_http_connection, hc);
1382 0 : if (verbose)
1383 : {
1384 : s =
1385 0 : format (s, "%-" SESSION_CLI_STATE_LEN "U", format_http_conn_state, hc);
1386 0 : if (verbose > 1)
1387 0 : s = format (s, "\n");
1388 : }
1389 :
1390 0 : return s;
1391 : }
1392 :
1393 : static u8 *
1394 0 : format_http_transport_listener (u8 *s, va_list *args)
1395 : {
1396 0 : u32 tc_index = va_arg (*args, u32);
1397 0 : u32 __clib_unused thread_index = va_arg (*args, u32);
1398 0 : u32 __clib_unused verbose = va_arg (*args, u32);
1399 0 : http_conn_t *lhc = http_listener_get (tc_index);
1400 :
1401 0 : s = format (s, "%-" SESSION_CLI_ID_LEN "U", format_http_listener, lhc);
1402 0 : if (verbose)
1403 : s =
1404 0 : format (s, "%-" SESSION_CLI_STATE_LEN "U", format_http_conn_state, lhc);
1405 0 : return s;
1406 : }
1407 :
1408 : static const transport_proto_vft_t http_proto = {
1409 : .enable = http_transport_enable,
1410 : .connect = http_transport_connect,
1411 : .start_listen = http_start_listen,
1412 : .stop_listen = http_stop_listen,
1413 : .close = http_transport_close,
1414 : .custom_tx = http_app_tx_callback,
1415 : .get_connection = http_transport_get_connection,
1416 : .get_listener = http_transport_get_listener,
1417 : .get_transport_endpoint = http_transport_get_endpoint,
1418 : .format_connection = format_http_transport_connection,
1419 : .format_listener = format_http_transport_listener,
1420 : .transport_options = {
1421 : .name = "http",
1422 : .short_name = "H",
1423 : .tx_type = TRANSPORT_TX_INTERNAL,
1424 : .service_type = TRANSPORT_SERVICE_APP,
1425 : },
1426 : };
1427 :
1428 : static clib_error_t *
1429 575 : http_transport_init (vlib_main_t *vm)
1430 : {
1431 575 : http_main_t *hm = &http_main;
1432 :
1433 575 : transport_register_protocol (TRANSPORT_PROTO_HTTP, &http_proto,
1434 : FIB_PROTOCOL_IP4, ~0);
1435 575 : transport_register_protocol (TRANSPORT_PROTO_HTTP, &http_proto,
1436 : FIB_PROTOCOL_IP6, ~0);
1437 :
1438 : /* Default values, configurable via startup conf */
1439 575 : hm->add_seg_size = 256 << 20;
1440 575 : hm->first_seg_size = 32 << 20;
1441 575 : hm->fifo_size = 512 << 10;
1442 :
1443 575 : return 0;
1444 : }
1445 :
1446 1151 : VLIB_INIT_FUNCTION (http_transport_init);
1447 :
1448 : static clib_error_t *
1449 575 : http_config_fn (vlib_main_t *vm, unformat_input_t *input)
1450 : {
1451 575 : http_main_t *hm = &http_main;
1452 : uword mem_sz;
1453 :
1454 575 : while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1455 : {
1456 0 : if (unformat (input, "first-segment-size %U", unformat_memory_size,
1457 : &mem_sz))
1458 : {
1459 0 : hm->first_seg_size = clib_max (mem_sz, 1 << 20);
1460 0 : if (hm->first_seg_size != mem_sz)
1461 0 : clib_warning ("first seg size too small %u", mem_sz);
1462 : }
1463 0 : else if (unformat (input, "add-segment-size %U", unformat_memory_size,
1464 : &mem_sz))
1465 : {
1466 0 : hm->add_seg_size = clib_max (mem_sz, 1 << 20);
1467 0 : if (hm->add_seg_size != mem_sz)
1468 0 : clib_warning ("add seg size too small %u", mem_sz);
1469 : }
1470 0 : else if (unformat (input, "fifo-size %U", unformat_memory_size, &mem_sz))
1471 : {
1472 0 : hm->fifo_size = clib_clamp (mem_sz, 4 << 10, 2 << 30);
1473 0 : if (hm->fifo_size != mem_sz)
1474 0 : clib_warning ("invalid fifo size %lu", mem_sz);
1475 : }
1476 : else
1477 0 : return clib_error_return (0, "unknown input `%U'",
1478 : format_unformat_error, input);
1479 : }
1480 575 : return 0;
1481 : }
1482 :
1483 3482 : VLIB_CONFIG_FUNCTION (http_config_fn, "http");
1484 :
1485 : VLIB_PLUGIN_REGISTER () = {
1486 : .version = VPP_BUILD_VER,
1487 : .description = "Hypertext Transfer Protocol (HTTP)",
1488 : .default_disabled = 0,
1489 : };
1490 :
1491 : /*
1492 : * fd.io coding-style-patch-verification: ON
1493 : *
1494 : * Local Variables:
1495 : * eval: (c-set-style "gnu")
1496 : * End:
1497 : */
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