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source: vbox/trunk/src/libs/curl-7.87.0/lib/cfilters.c@ 98339

Last change on this file since 98339 was 98339, checked in by vboxsync, 20 months ago

curl-7.87.0: EOL style fixing, bit more irrelevant export fixing

  • Property svn:eol-style set to native
File size: 13.0 KB
Line 
1/***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 1998 - 2022, Daniel Stenberg, <daniel@haxx.se>, et al.
9 *
10 * This software is licensed as described in the file COPYING, which
11 * you should have received as part of this distribution. The terms
12 * are also available at https://curl.se/docs/copyright.html.
13 *
14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
15 * copies of the Software, and permit persons to whom the Software is
16 * furnished to do so, under the terms of the COPYING file.
17 *
18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19 * KIND, either express or implied.
20 *
21 * SPDX-License-Identifier: curl
22 *
23 ***************************************************************************/
24
25#include "curl_setup.h"
26
27#include "urldata.h"
28#include "strerror.h"
29#include "cfilters.h"
30#include "connect.h"
31#include "url.h" /* for Curl_safefree() */
32#include "sendf.h"
33#include "sockaddr.h" /* required for Curl_sockaddr_storage */
34#include "multiif.h"
35#include "progress.h"
36#include "warnless.h"
37#include "http_proxy.h"
38#include "socks.h"
39#include "vtls/vtls.h"
40
41/* The last 3 #include files should be in this order */
42#include "curl_printf.h"
43#include "curl_memory.h"
44#include "memdebug.h"
45
46#ifndef ARRAYSIZE
47#define ARRAYSIZE(A) (sizeof(A)/sizeof((A)[0]))
48#endif
49
50
51void Curl_cf_def_destroy_this(struct Curl_cfilter *cf, struct Curl_easy *data)
52{
53 (void)cf;
54 (void)data;
55}
56
57CURLcode Curl_cf_def_setup(struct Curl_cfilter *cf,
58 struct Curl_easy *data,
59 const struct Curl_dns_entry *remotehost)
60{
61 DEBUGASSERT(cf->next);
62 return cf->next->cft->setup(cf->next, data, remotehost);
63}
64
65void Curl_cf_def_attach_data(struct Curl_cfilter *cf,
66 struct Curl_easy *data)
67{
68 (void)cf;
69 (void)data;
70}
71
72void Curl_cf_def_detach_data(struct Curl_cfilter *cf,
73 struct Curl_easy *data)
74{
75 (void)cf;
76 (void)data;
77}
78
79void Curl_cf_def_close(struct Curl_cfilter *cf, struct Curl_easy *data)
80{
81 DEBUGASSERT(cf->next);
82 cf->connected = FALSE;
83 cf->next->cft->close(cf->next, data);
84}
85
86CURLcode Curl_cf_def_connect(struct Curl_cfilter *cf,
87 struct Curl_easy *data,
88 bool blocking, bool *done)
89{
90 DEBUGASSERT(cf->next);
91 return cf->next->cft->connect(cf->next, data, blocking, done);
92}
93
94void Curl_cf_def_get_host(struct Curl_cfilter *cf, struct Curl_easy *data,
95 const char **phost, const char **pdisplay_host,
96 int *pport)
97{
98 DEBUGASSERT(cf->next);
99 cf->next->cft->get_host(cf->next, data, phost, pdisplay_host, pport);
100}
101
102int Curl_cf_def_get_select_socks(struct Curl_cfilter *cf,
103 struct Curl_easy *data,
104 curl_socket_t *socks)
105{
106 DEBUGASSERT(cf->next);
107 return cf->next->cft->get_select_socks(cf->next, data, socks);
108}
109
110bool Curl_cf_def_data_pending(struct Curl_cfilter *cf,
111 const struct Curl_easy *data)
112{
113 DEBUGASSERT(cf->next);
114 return cf->next->cft->has_data_pending(cf->next, data);
115}
116
117ssize_t Curl_cf_def_send(struct Curl_cfilter *cf, struct Curl_easy *data,
118 const void *buf, size_t len, CURLcode *err)
119{
120 DEBUGASSERT(cf->next);
121 return cf->next->cft->do_send(cf->next, data, buf, len, err);
122}
123
124ssize_t Curl_cf_def_recv(struct Curl_cfilter *cf, struct Curl_easy *data,
125 char *buf, size_t len, CURLcode *err)
126{
127 DEBUGASSERT(cf->next);
128 return cf->next->cft->do_recv(cf->next, data, buf, len, err);
129}
130
131void Curl_conn_cf_discard_all(struct Curl_easy *data,
132 struct connectdata *conn, int index)
133{
134 struct Curl_cfilter *cfn, *cf = conn->cfilter[index];
135
136 if(cf) {
137 conn->cfilter[index] = NULL;
138 while(cf) {
139 cfn = cf->next;
140 cf->cft->destroy(cf, data);
141 free(cf);
142 cf = cfn;
143 }
144 }
145}
146
147void Curl_conn_close(struct Curl_easy *data, int index)
148{
149 struct Curl_cfilter *cf;
150
151 DEBUGASSERT(data->conn);
152 /* it is valid to call that without filters being present */
153 cf = data->conn->cfilter[index];
154 if(cf) {
155 cf->cft->close(cf, data);
156 }
157}
158
159ssize_t Curl_conn_recv(struct Curl_easy *data, int num, char *buf,
160 size_t len, CURLcode *code)
161{
162 struct Curl_cfilter *cf;
163 ssize_t nread;
164
165 DEBUGASSERT(data);
166 DEBUGASSERT(data->conn);
167 cf = data->conn->cfilter[num];
168 while(cf && !cf->connected) {
169 cf = cf->next;
170 }
171 if(cf) {
172 nread = cf->cft->do_recv(cf, data, buf, len, code);
173 /* DEBUGF(infof(data, "Curl_conn_recv(handle=%p, index=%d)"
174 "-> %ld, err=%d", data, num, nread, *code));*/
175 return nread;
176 }
177 failf(data, "no filter connected, conn=%ld, sockindex=%d",
178 data->conn->connection_id, num);
179 *code = CURLE_FAILED_INIT;
180 return -1;
181}
182
183ssize_t Curl_conn_send(struct Curl_easy *data, int num,
184 const void *mem, size_t len, CURLcode *code)
185{
186 struct Curl_cfilter *cf;
187 ssize_t nwritten;
188
189 DEBUGASSERT(data);
190 DEBUGASSERT(data->conn);
191 cf = data->conn->cfilter[num];
192 while(cf && !cf->connected) {
193 cf = cf->next;
194 }
195 if(cf) {
196 nwritten = cf->cft->do_send(cf, data, mem, len, code);
197 /* DEBUGF(infof(data, "Curl_conn_send(handle=%p, index=%d, len=%ld)"
198 " -> %ld, err=%d", data, num, len, nwritten, *code));*/
199 return nwritten;
200 }
201 failf(data, "no filter connected, conn=%ld, sockindex=%d",
202 data->conn->connection_id, num);
203 *code = CURLE_FAILED_INIT;
204 return -1;
205}
206
207CURLcode Curl_cf_create(struct Curl_cfilter **pcf,
208 const struct Curl_cftype *cft,
209 void *ctx)
210{
211 struct Curl_cfilter *cf;
212 CURLcode result = CURLE_OUT_OF_MEMORY;
213
214 DEBUGASSERT(cft);
215 cf = calloc(sizeof(*cf), 1);
216 if(!cf)
217 goto out;
218
219 cf->cft = cft;
220 cf->ctx = ctx;
221 result = CURLE_OK;
222out:
223 *pcf = cf;
224 return result;
225}
226
227void Curl_conn_cf_add(struct Curl_easy *data,
228 struct connectdata *conn,
229 int index,
230 struct Curl_cfilter *cf)
231{
232 (void)data;
233 DEBUGASSERT(conn);
234 DEBUGASSERT(!cf->conn);
235 DEBUGASSERT(!cf->next);
236
237 DEBUGF(infof(data, CMSGI(conn, index, "cf_add(filter=%s)"),
238 cf->cft->name));
239 cf->next = conn->cfilter[index];
240 cf->conn = conn;
241 cf->sockindex = index;
242 conn->cfilter[index] = cf;
243}
244
245void Curl_conn_cf_discard(struct Curl_cfilter *cf, struct Curl_easy *data)
246{
247 struct Curl_cfilter **pprev = &cf->conn->cfilter[cf->sockindex];
248
249 /* remove from chain if still in there */
250 DEBUGASSERT(cf);
251 while (*pprev) {
252 if (*pprev == cf) {
253 *pprev = cf->next;
254 break;
255 }
256 pprev = &((*pprev)->next);
257 }
258 cf->cft->destroy(cf, data);
259 free(cf);
260}
261
262ssize_t Curl_conn_cf_send(struct Curl_cfilter *cf, struct Curl_easy *data,
263 const void *buf, size_t len, CURLcode *err)
264{
265 return cf->cft->do_send(cf, data, buf, len, err);
266}
267
268ssize_t Curl_conn_cf_recv(struct Curl_cfilter *cf, struct Curl_easy *data,
269 char *buf, size_t len, CURLcode *err)
270{
271 return cf->cft->do_recv(cf, data, buf, len, err);
272}
273
274CURLcode Curl_conn_setup(struct Curl_easy *data,
275 struct connectdata *conn,
276 int sockindex,
277 const struct Curl_dns_entry *remotehost,
278 int ssl_mode)
279{
280 struct Curl_cfilter *cf;
281 CURLcode result;
282
283 DEBUGASSERT(data);
284 /* If no filter is set, we have the "default" setup of connection filters.
285 * The filter chain from botton to top will be:
286 * - SOCKET socket filter for outgoing connection to remotehost
287 * if http_proxy tunneling is engaged:
288 * - SSL if proxytype is CURLPROXY_HTTPS
289 * - HTTP_PROXY_TUNNEL
290 * otherwise, if socks_proxy is engaged:
291 * - SOCKS_PROXY_TUNNEL
292 * - SSL if conn->handler has PROTOPT_SSL
293 */
294 if(!conn->cfilter[sockindex]) {
295 DEBUGF(infof(data, DMSGI(data, sockindex, "setup, init filter chain")));
296 result = Curl_conn_socket_set(data, conn, sockindex);
297 if(result)
298 goto out;
299
300#ifndef CURL_DISABLE_PROXY
301 if(conn->bits.socksproxy) {
302 result = Curl_conn_socks_proxy_add(data, conn, sockindex);
303 if(result)
304 goto out;
305 }
306
307 if(conn->bits.httpproxy) {
308#ifdef USE_SSL
309 if(conn->http_proxy.proxytype == CURLPROXY_HTTPS) {
310 result = Curl_ssl_cfilter_proxy_add(data, conn, sockindex);
311 if(result)
312 goto out;
313 }
314#endif /* USE_SSL */
315
316#if !defined(CURL_DISABLE_HTTP)
317 if(conn->bits.tunnel_proxy) {
318 result = Curl_conn_http_proxy_add(data, conn, sockindex);
319 if(result)
320 goto out;
321 }
322#endif /* !CURL_DISABLE_HTTP */
323 }
324#endif /* !CURL_DISABLE_PROXY */
325
326#ifdef USE_SSL
327 if(ssl_mode == CURL_CF_SSL_ENABLE
328 || (ssl_mode != CURL_CF_SSL_DISABLE
329 && conn->handler->flags & PROTOPT_SSL)) {
330 result = Curl_ssl_cfilter_add(data, conn, sockindex);
331 if(result)
332 goto out;
333 }
334#else
335 (void)ssl_mode;
336#endif /* USE_SSL */
337
338#if !defined(CURL_DISABLE_PROXY) && !defined(CURL_DISABLE_HTTP)
339 if(data->set.haproxyprotocol) {
340 result = Curl_conn_haproxy_add(data, conn, sockindex);
341 if(result)
342 goto out;
343 }
344#endif /* !CURL_DISABLE_PROXY && !CURL_DISABLE_HTTP */
345
346 }
347 DEBUGASSERT(conn->cfilter[sockindex]);
348 cf = data->conn->cfilter[sockindex];
349 result = cf->cft->setup(cf, data, remotehost);
350
351out:
352 return result;
353}
354
355CURLcode Curl_conn_connect(struct Curl_easy *data,
356 int sockindex,
357 bool blocking,
358 bool *done)
359{
360 struct Curl_cfilter *cf;
361 CURLcode result;
362
363 DEBUGASSERT(data);
364
365 cf = data->conn->cfilter[sockindex];
366 DEBUGASSERT(cf);
367 result = cf->cft->connect(cf, data, blocking, done);
368
369 DEBUGF(infof(data, DMSGI(data, sockindex, "connect(block=%d)-> %d, done=%d"),
370 blocking, result, *done));
371 return result;
372}
373
374bool Curl_conn_is_connected(struct connectdata *conn, int sockindex)
375{
376 struct Curl_cfilter *cf;
377
378 cf = conn->cfilter[sockindex];
379 return cf && cf->connected;
380}
381
382bool Curl_conn_is_ip_connected(struct Curl_easy *data, int sockindex)
383{
384 struct Curl_cfilter *cf;
385
386 cf = data->conn->cfilter[sockindex];
387 while(cf) {
388 if(cf->connected)
389 return TRUE;
390 if(cf->cft->flags & CF_TYPE_IP_CONNECT)
391 return FALSE;
392 cf = cf->next;
393 }
394 return FALSE;
395}
396
397bool Curl_conn_is_ssl(struct Curl_easy *data, int sockindex)
398{
399 struct Curl_cfilter *cf = data->conn? data->conn->cfilter[sockindex] : NULL;
400
401 (void)data;
402 for(; cf; cf = cf->next) {
403 if(cf->cft->flags & CF_TYPE_SSL)
404 return TRUE;
405 if(cf->cft->flags & CF_TYPE_IP_CONNECT)
406 return FALSE;
407 }
408 return FALSE;
409}
410
411
412bool Curl_conn_data_pending(struct Curl_easy *data, int sockindex)
413{
414 struct Curl_cfilter *cf;
415
416 (void)data;
417 DEBUGASSERT(data);
418 DEBUGASSERT(data->conn);
419 if(Curl_recv_has_postponed_data(data->conn, sockindex))
420 return TRUE;
421
422 cf = data->conn->cfilter[sockindex];
423 while(cf && !cf->connected) {
424 cf = cf->next;
425 }
426 if(cf) {
427 return cf->cft->has_data_pending(cf, data);
428 }
429 return FALSE;
430}
431
432int Curl_conn_get_select_socks(struct Curl_easy *data, int sockindex,
433 curl_socket_t *socks)
434{
435 struct Curl_cfilter *cf;
436
437 DEBUGASSERT(data);
438 DEBUGASSERT(data->conn);
439 cf = data->conn->cfilter[sockindex];
440 if(cf) {
441 return cf->cft->get_select_socks(cf, data, socks);
442 }
443 return GETSOCK_BLANK;
444}
445
446void Curl_conn_attach_data(struct connectdata *conn,
447 struct Curl_easy *data)
448{
449 size_t i;
450 struct Curl_cfilter *cf;
451
452 for(i = 0; i < ARRAYSIZE(conn->cfilter); ++i) {
453 cf = conn->cfilter[i];
454 if(cf) {
455 while(cf) {
456 cf->cft->attach_data(cf, data);
457 cf = cf->next;
458 }
459 }
460 }
461}
462
463void Curl_conn_detach_data(struct connectdata *conn,
464 struct Curl_easy *data)
465{
466 size_t i;
467 struct Curl_cfilter *cf;
468
469 for(i = 0; i < ARRAYSIZE(conn->cfilter); ++i) {
470 cf = conn->cfilter[i];
471 if(cf) {
472 while(cf) {
473 cf->cft->detach_data(cf, data);
474 cf = cf->next;
475 }
476 }
477 }
478}
479
480void Curl_conn_get_host(struct Curl_easy *data, int sockindex,
481 const char **phost, const char **pdisplay_host,
482 int *pport)
483{
484 struct Curl_cfilter *cf;
485
486 DEBUGASSERT(data->conn);
487 cf = data->conn->cfilter[sockindex];
488 if(cf) {
489 cf->cft->get_host(cf, data, phost, pdisplay_host, pport);
490 }
491 else {
492 /* Some filter ask during shutdown for this, mainly for debugging
493 * purposes. We hand out the defaults, however this is not always
494 * accurate, as the connction might be tunneled, etc. But all that
495 * state is already gone here. */
496 *phost = data->conn->host.name;
497 *pdisplay_host = data->conn->host.dispname;
498 *pport = data->conn->remote_port;
499 }
500}
501
502
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