231 lines
6.2 KiB
C
231 lines
6.2 KiB
C
|
/***************************************************************************
|
||
|
|
* _ _ ____ _
|
||
|
|
* Project ___| | | | _ \| |
|
||
|
|
* / __| | | | |_) | |
|
||
|
|
* | (__| |_| | _ <| |___
|
||
|
|
* \___|\___/|_| \_\_____|
|
||
|
|
*
|
||
|
|
* Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
|
||
|
|
*
|
||
|
|
* This software is licensed as described in the file COPYING, which
|
||
|
|
* you should have received as part of this distribution. The terms
|
||
|
|
* are also available at https://curl.se/docs/copyright.html.
|
||
|
|
*
|
||
|
|
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
|
||
|
|
* copies of the Software, and permit persons to whom the Software is
|
||
|
|
* furnished to do so, under the terms of the COPYING file.
|
||
|
|
*
|
||
|
|
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
|
||
|
|
* KIND, either express or implied.
|
||
|
|
*
|
||
|
|
* SPDX-License-Identifier: curl
|
||
|
|
*
|
||
|
|
***************************************************************************/
|
||
|
|
|
||
|
|
#include "curl_setup.h"
|
||
|
|
|
||
|
|
#include "http_proxy.h"
|
||
|
|
|
||
|
|
#if !defined(CURL_DISABLE_HTTP) && !defined(CURL_DISABLE_PROXY)
|
||
|
|
|
||
|
|
#include <curl/curl.h>
|
||
|
|
#ifdef USE_HYPER
|
||
|
|
#include <hyper.h>
|
||
|
|
#endif
|
||
|
|
#include "sendf.h"
|
||
|
|
#include "http.h"
|
||
|
|
#include "url.h"
|
||
|
|
#include "select.h"
|
||
|
|
#include "progress.h"
|
||
|
|
#include "cfilters.h"
|
||
|
|
#include "cf-h1-proxy.h"
|
||
|
|
#include "cf-h2-proxy.h"
|
||
|
|
#include "connect.h"
|
||
|
|
#include "curlx.h"
|
||
|
|
#include "vtls/vtls.h"
|
||
|
|
#include "transfer.h"
|
||
|
|
#include "multiif.h"
|
||
|
|
|
||
|
|
/* The last 3 #include files should be in this order */
|
||
|
|
#include "curl_printf.h"
|
||
|
|
#include "curl_memory.h"
|
||
|
|
#include "memdebug.h"
|
||
|
|
|
||
|
|
|
||
|
|
struct cf_proxy_ctx {
|
||
|
|
/* the protocol specific sub-filter we install during connect */
|
||
|
|
struct Curl_cfilter *cf_protocol;
|
||
|
|
};
|
||
|
|
|
||
|
|
static CURLcode http_proxy_cf_connect(struct Curl_cfilter *cf,
|
||
|
|
struct Curl_easy *data,
|
||
|
|
bool blocking, bool *done)
|
||
|
|
{
|
||
|
|
struct cf_proxy_ctx *ctx = cf->ctx;
|
||
|
|
CURLcode result;
|
||
|
|
|
||
|
|
if(cf->connected) {
|
||
|
|
*done = TRUE;
|
||
|
|
return CURLE_OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
CURL_TRC_CF(data, cf, "connect");
|
||
|
|
connect_sub:
|
||
|
|
result = cf->next->cft->do_connect(cf->next, data, blocking, done);
|
||
|
|
if(result || !*done)
|
||
|
|
return result;
|
||
|
|
|
||
|
|
*done = FALSE;
|
||
|
|
if(!ctx->cf_protocol) {
|
||
|
|
struct Curl_cfilter *cf_protocol = NULL;
|
||
|
|
int alpn = Curl_conn_cf_is_ssl(cf->next)?
|
||
|
|
cf->conn->proxy_alpn : CURL_HTTP_VERSION_1_1;
|
||
|
|
|
||
|
|
/* First time call after the subchain connected */
|
||
|
|
switch(alpn) {
|
||
|
|
case CURL_HTTP_VERSION_NONE:
|
||
|
|
case CURL_HTTP_VERSION_1_0:
|
||
|
|
case CURL_HTTP_VERSION_1_1:
|
||
|
|
CURL_TRC_CF(data, cf, "installing subfilter for HTTP/1.1");
|
||
|
|
infof(data, "CONNECT tunnel: HTTP/1.%d negotiated",
|
||
|
|
(alpn == CURL_HTTP_VERSION_1_0)? 0 : 1);
|
||
|
|
result = Curl_cf_h1_proxy_insert_after(cf, data);
|
||
|
|
if(result)
|
||
|
|
goto out;
|
||
|
|
cf_protocol = cf->next;
|
||
|
|
break;
|
||
|
|
#ifdef USE_NGHTTP2
|
||
|
|
case CURL_HTTP_VERSION_2:
|
||
|
|
CURL_TRC_CF(data, cf, "installing subfilter for HTTP/2");
|
||
|
|
infof(data, "CONNECT tunnel: HTTP/2 negotiated");
|
||
|
|
result = Curl_cf_h2_proxy_insert_after(cf, data);
|
||
|
|
if(result)
|
||
|
|
goto out;
|
||
|
|
cf_protocol = cf->next;
|
||
|
|
break;
|
||
|
|
#endif
|
||
|
|
default:
|
||
|
|
CURL_TRC_CF(data, cf, "installing subfilter for default HTTP/1.1");
|
||
|
|
infof(data, "CONNECT tunnel: unsupported ALPN(%d) negotiated", alpn);
|
||
|
|
result = CURLE_COULDNT_CONNECT;
|
||
|
|
goto out;
|
||
|
|
}
|
||
|
|
|
||
|
|
ctx->cf_protocol = cf_protocol;
|
||
|
|
/* after we installed the filter "below" us, we call connect
|
||
|
|
* on out sub-chain again.
|
||
|
|
*/
|
||
|
|
goto connect_sub;
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
/* subchain connected and we had already installed the protocol filter.
|
||
|
|
* This means the protocol tunnel is established, we are done.
|
||
|
|
*/
|
||
|
|
DEBUGASSERT(ctx->cf_protocol);
|
||
|
|
result = CURLE_OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
out:
|
||
|
|
if(!result) {
|
||
|
|
cf->connected = TRUE;
|
||
|
|
*done = TRUE;
|
||
|
|
}
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
void Curl_cf_http_proxy_get_host(struct Curl_cfilter *cf,
|
||
|
|
struct Curl_easy *data,
|
||
|
|
const char **phost,
|
||
|
|
const char **pdisplay_host,
|
||
|
|
int *pport)
|
||
|
|
{
|
||
|
|
(void)data;
|
||
|
|
if(!cf->connected) {
|
||
|
|
*phost = cf->conn->http_proxy.host.name;
|
||
|
|
*pdisplay_host = cf->conn->http_proxy.host.dispname;
|
||
|
|
*pport = (int)cf->conn->http_proxy.port;
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
cf->next->cft->get_host(cf->next, data, phost, pdisplay_host, pport);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static void http_proxy_cf_destroy(struct Curl_cfilter *cf,
|
||
|
|
struct Curl_easy *data)
|
||
|
|
{
|
||
|
|
struct cf_proxy_ctx *ctx = cf->ctx;
|
||
|
|
|
||
|
|
(void)data;
|
||
|
|
CURL_TRC_CF(data, cf, "destroy");
|
||
|
|
free(ctx);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void http_proxy_cf_close(struct Curl_cfilter *cf,
|
||
|
|
struct Curl_easy *data)
|
||
|
|
{
|
||
|
|
struct cf_proxy_ctx *ctx = cf->ctx;
|
||
|
|
|
||
|
|
CURL_TRC_CF(data, cf, "close");
|
||
|
|
cf->connected = FALSE;
|
||
|
|
if(ctx->cf_protocol) {
|
||
|
|
struct Curl_cfilter *f;
|
||
|
|
/* if someone already removed it, we assume he also
|
||
|
|
* took care of destroying it. */
|
||
|
|
for(f = cf->next; f; f = f->next) {
|
||
|
|
if(f == ctx->cf_protocol) {
|
||
|
|
/* still in our sub-chain */
|
||
|
|
Curl_conn_cf_discard_sub(cf, ctx->cf_protocol, data, FALSE);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
ctx->cf_protocol = NULL;
|
||
|
|
}
|
||
|
|
if(cf->next)
|
||
|
|
cf->next->cft->do_close(cf->next, data);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
struct Curl_cftype Curl_cft_http_proxy = {
|
||
|
|
"HTTP-PROXY",
|
||
|
|
CF_TYPE_IP_CONNECT,
|
||
|
|
0,
|
||
|
|
http_proxy_cf_destroy,
|
||
|
|
http_proxy_cf_connect,
|
||
|
|
http_proxy_cf_close,
|
||
|
|
Curl_cf_http_proxy_get_host,
|
||
|
|
Curl_cf_def_get_select_socks,
|
||
|
|
Curl_cf_def_data_pending,
|
||
|
|
Curl_cf_def_send,
|
||
|
|
Curl_cf_def_recv,
|
||
|
|
Curl_cf_def_cntrl,
|
||
|
|
Curl_cf_def_conn_is_alive,
|
||
|
|
Curl_cf_def_conn_keep_alive,
|
||
|
|
Curl_cf_def_query,
|
||
|
|
};
|
||
|
|
|
||
|
|
CURLcode Curl_cf_http_proxy_insert_after(struct Curl_cfilter *cf_at,
|
||
|
|
struct Curl_easy *data)
|
||
|
|
{
|
||
|
|
struct Curl_cfilter *cf;
|
||
|
|
struct cf_proxy_ctx *ctx = NULL;
|
||
|
|
CURLcode result;
|
||
|
|
|
||
|
|
(void)data;
|
||
|
|
ctx = calloc(1, sizeof(*ctx));
|
||
|
|
if(!ctx) {
|
||
|
|
result = CURLE_OUT_OF_MEMORY;
|
||
|
|
goto out;
|
||
|
|
}
|
||
|
|
result = Curl_cf_create(&cf, &Curl_cft_http_proxy, ctx);
|
||
|
|
if(result)
|
||
|
|
goto out;
|
||
|
|
ctx = NULL;
|
||
|
|
Curl_conn_cf_insert_after(cf_at, cf);
|
||
|
|
|
||
|
|
out:
|
||
|
|
free(ctx);
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif /* ! CURL_DISABLE_HTTP && !CURL_DISABLE_PROXY */
|