[337] | 1 | /***************************************************************************
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| 2 | * _ _ ____ _
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| 3 | * Project ___| | | | _ \| |
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| 4 | * / __| | | | |_) | |
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| 5 | * | (__| |_| | _ <| |___
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| 6 | * \___|\___/|_| \_\_____|
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| 7 | *
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| 8 | * Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
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| 9 | *
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| 10 | * This software is licensed as described in the file COPYING, which
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| 11 | * you should have received as part of this distribution. The terms
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| 12 | * are also available at https://curl.haxx.se/docs/copyright.html.
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| 13 | *
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| 14 | * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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| 15 | * copies of the Software, and permit persons to whom the Software is
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| 16 | * furnished to do so, under the terms of the COPYING file.
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| 17 | *
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| 18 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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| 19 | * KIND, either express or implied.
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| 20 | *
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| 21 | ***************************************************************************/
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| 22 |
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| 23 | #include "curl_setup.h"
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| 24 |
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| 25 | #include "http_proxy.h"
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| 26 |
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| 27 | #if !defined(CURL_DISABLE_PROXY) && !defined(CURL_DISABLE_HTTP)
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| 28 |
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| 29 | #include <curl/curl.h>
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| 30 | #include "sendf.h"
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| 31 | #include "http.h"
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| 32 | #include "url.h"
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| 33 | #include "select.h"
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| 34 | #include "progress.h"
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| 35 | #include "non-ascii.h"
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| 36 | #include "connect.h"
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| 37 | #include "curlx.h"
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| 38 | #include "vtls/vtls.h"
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| 39 |
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| 40 | /* The last 3 #include files should be in this order */
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| 41 | #include "curl_printf.h"
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| 42 | #include "curl_memory.h"
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| 43 | #include "memdebug.h"
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| 44 |
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| 45 | /*
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| 46 | * Perform SSL initialization for HTTPS proxy. Sets
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| 47 | * proxy_ssl_connected connection bit when complete. Can be
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| 48 | * called multiple times.
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| 49 | */
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| 50 | static CURLcode https_proxy_connect(struct connectdata *conn, int sockindex)
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| 51 | {
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| 52 | #ifdef USE_SSL
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| 53 | CURLcode result = CURLE_OK;
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| 54 | DEBUGASSERT(conn->http_proxy.proxytype == CURLPROXY_HTTPS);
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| 55 | if(!conn->bits.proxy_ssl_connected[sockindex]) {
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| 56 | /* perform SSL initialization for this socket */
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| 57 | result =
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| 58 | Curl_ssl_connect_nonblocking(conn, sockindex,
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| 59 | &conn->bits.proxy_ssl_connected[sockindex]);
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| 60 | if(result)
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| 61 | conn->bits.close = TRUE; /* a failed connection is marked for closure to
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| 62 | prevent (bad) re-use or similar */
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| 63 | }
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| 64 | return result;
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| 65 | #else
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| 66 | (void) conn;
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| 67 | (void) sockindex;
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| 68 | return CURLE_NOT_BUILT_IN;
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| 69 | #endif
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| 70 | }
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| 71 |
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| 72 | CURLcode Curl_proxy_connect(struct connectdata *conn, int sockindex)
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| 73 | {
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| 74 | if(conn->http_proxy.proxytype == CURLPROXY_HTTPS) {
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| 75 | const CURLcode result = https_proxy_connect(conn, sockindex);
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| 76 | if(result)
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| 77 | return result;
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| 78 | if(!conn->bits.proxy_ssl_connected[sockindex])
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| 79 | return result; /* wait for HTTPS proxy SSL initialization to complete */
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| 80 | }
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| 81 |
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| 82 | if(conn->bits.tunnel_proxy && conn->bits.httpproxy) {
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| 83 | #ifndef CURL_DISABLE_PROXY
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| 84 | /* for [protocol] tunneled through HTTP proxy */
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| 85 | struct HTTP http_proxy;
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| 86 | void *prot_save;
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| 87 | const char *hostname;
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| 88 | int remote_port;
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| 89 | CURLcode result;
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| 90 |
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| 91 | /* BLOCKING */
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| 92 | /* We want "seamless" operations through HTTP proxy tunnel */
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| 93 |
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| 94 | /* Curl_proxyCONNECT is based on a pointer to a struct HTTP at the
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| 95 | * member conn->proto.http; we want [protocol] through HTTP and we have
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| 96 | * to change the member temporarily for connecting to the HTTP
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| 97 | * proxy. After Curl_proxyCONNECT we have to set back the member to the
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| 98 | * original pointer
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| 99 | *
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| 100 | * This function might be called several times in the multi interface case
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| 101 | * if the proxy's CONNECT response is not instant.
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| 102 | */
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| 103 | prot_save = conn->data->req.protop;
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| 104 | memset(&http_proxy, 0, sizeof(http_proxy));
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| 105 | conn->data->req.protop = &http_proxy;
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| 106 | connkeep(conn, "HTTP proxy CONNECT");
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| 107 |
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| 108 | /* for the secondary socket (FTP), use the "connect to host"
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| 109 | * but ignore the "connect to port" (use the secondary port)
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| 110 | */
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| 111 |
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| 112 | if(conn->bits.conn_to_host)
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| 113 | hostname = conn->conn_to_host.name;
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| 114 | else if(sockindex == SECONDARYSOCKET)
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| 115 | hostname = conn->secondaryhostname;
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| 116 | else
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| 117 | hostname = conn->host.name;
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| 118 |
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| 119 | if(sockindex == SECONDARYSOCKET)
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| 120 | remote_port = conn->secondary_port;
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| 121 | else if(conn->bits.conn_to_port)
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| 122 | remote_port = conn->conn_to_port;
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| 123 | else
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| 124 | remote_port = conn->remote_port;
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| 125 | result = Curl_proxyCONNECT(conn, sockindex, hostname, remote_port);
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| 126 | conn->data->req.protop = prot_save;
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| 127 | if(CURLE_OK != result)
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| 128 | return result;
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| 129 | Curl_safefree(conn->allocptr.proxyuserpwd);
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| 130 | #else
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| 131 | return CURLE_NOT_BUILT_IN;
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| 132 | #endif
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| 133 | }
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| 134 | /* no HTTP tunnel proxy, just return */
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| 135 | return CURLE_OK;
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| 136 | }
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| 137 |
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| 138 | bool Curl_connect_complete(struct connectdata *conn)
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| 139 | {
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| 140 | return !conn->connect_state ||
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| 141 | (conn->connect_state->tunnel_state == TUNNEL_COMPLETE);
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| 142 | }
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| 143 |
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| 144 | bool Curl_connect_ongoing(struct connectdata *conn)
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| 145 | {
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| 146 | return conn->connect_state &&
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| 147 | (conn->connect_state->tunnel_state != TUNNEL_COMPLETE);
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| 148 | }
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| 149 |
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| 150 | static CURLcode connect_init(struct connectdata *conn, bool reinit)
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| 151 | {
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| 152 | struct http_connect_state *s;
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| 153 | if(!reinit) {
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| 154 | DEBUGASSERT(!conn->connect_state);
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| 155 | s = calloc(1, sizeof(struct http_connect_state));
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| 156 | if(!s)
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| 157 | return CURLE_OUT_OF_MEMORY;
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| 158 | infof(conn->data, "allocate connect buffer!\n");
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| 159 | conn->connect_state = s;
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| 160 | }
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| 161 | else {
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| 162 | DEBUGASSERT(conn->connect_state);
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| 163 | s = conn->connect_state;
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| 164 | }
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| 165 | s->tunnel_state = TUNNEL_INIT;
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| 166 | s->keepon = TRUE;
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| 167 | s->line_start = s->connect_buffer;
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| 168 | s->ptr = s->line_start;
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| 169 | s->cl = 0;
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| 170 | return CURLE_OK;
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| 171 | }
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| 172 |
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| 173 | static void connect_done(struct connectdata *conn)
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| 174 | {
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| 175 | struct http_connect_state *s = conn->connect_state;
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| 176 | s->tunnel_state = TUNNEL_COMPLETE;
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| 177 | infof(conn->data, "CONNECT phase completed!\n");
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| 178 | }
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| 179 |
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| 180 | static CURLcode CONNECT(struct connectdata *conn,
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| 181 | int sockindex,
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| 182 | const char *hostname,
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| 183 | int remote_port)
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| 184 | {
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| 185 | int subversion = 0;
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| 186 | struct Curl_easy *data = conn->data;
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| 187 | struct SingleRequest *k = &data->req;
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| 188 | CURLcode result;
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| 189 | curl_socket_t tunnelsocket = conn->sock[sockindex];
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| 190 | bool closeConnection = FALSE;
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| 191 | timediff_t check;
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| 192 | struct http_connect_state *s = conn->connect_state;
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| 193 |
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| 194 | #define SELECT_OK 0
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| 195 | #define SELECT_ERROR 1
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| 196 | #define SELECT_TIMEOUT 2
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| 197 |
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| 198 | if(Curl_connect_complete(conn))
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| 199 | return CURLE_OK; /* CONNECT is already completed */
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| 200 |
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| 201 | conn->bits.proxy_connect_closed = FALSE;
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| 202 |
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| 203 | do {
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| 204 | if(TUNNEL_INIT == s->tunnel_state) {
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| 205 | /* BEGIN CONNECT PHASE */
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| 206 | char *host_port;
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| 207 | Curl_send_buffer *req_buffer;
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| 208 |
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| 209 | infof(data, "Establish HTTP proxy tunnel to %s:%hu\n",
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| 210 | hostname, remote_port);
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| 211 |
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| 212 | /* This only happens if we've looped here due to authentication
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| 213 | reasons, and we don't really use the newly cloned URL here
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| 214 | then. Just free() it. */
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| 215 | free(data->req.newurl);
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| 216 | data->req.newurl = NULL;
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| 217 |
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| 218 | /* initialize a dynamic send-buffer */
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| 219 | req_buffer = Curl_add_buffer_init();
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| 220 |
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| 221 | if(!req_buffer)
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| 222 | return CURLE_OUT_OF_MEMORY;
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| 223 |
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| 224 | host_port = aprintf("%s:%hu", hostname, remote_port);
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| 225 | if(!host_port) {
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| 226 | Curl_add_buffer_free(req_buffer);
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| 227 | return CURLE_OUT_OF_MEMORY;
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| 228 | }
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| 229 |
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| 230 | /* Setup the proxy-authorization header, if any */
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| 231 | result = Curl_http_output_auth(conn, "CONNECT", host_port, TRUE);
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| 232 |
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| 233 | free(host_port);
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| 234 |
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| 235 | if(!result) {
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| 236 | char *host = NULL;
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| 237 | const char *proxyconn = "";
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| 238 | const char *useragent = "";
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| 239 | const char *http = (conn->http_proxy.proxytype == CURLPROXY_HTTP_1_0) ?
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| 240 | "1.0" : "1.1";
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| 241 | bool ipv6_ip = conn->bits.ipv6_ip;
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| 242 | char *hostheader;
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| 243 |
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| 244 | /* the hostname may be different */
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| 245 | if(hostname != conn->host.name)
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| 246 | ipv6_ip = (strchr(hostname, ':') != NULL);
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| 247 | hostheader = /* host:port with IPv6 support */
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| 248 | aprintf("%s%s%s:%hu", ipv6_ip?"[":"", hostname, ipv6_ip?"]":"",
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| 249 | remote_port);
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| 250 | if(!hostheader) {
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| 251 | Curl_add_buffer_free(req_buffer);
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| 252 | return CURLE_OUT_OF_MEMORY;
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| 253 | }
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| 254 |
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| 255 | if(!Curl_checkProxyheaders(conn, "Host:")) {
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| 256 | host = aprintf("Host: %s\r\n", hostheader);
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| 257 | if(!host) {
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| 258 | free(hostheader);
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| 259 | Curl_add_buffer_free(req_buffer);
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| 260 | return CURLE_OUT_OF_MEMORY;
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| 261 | }
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| 262 | }
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| 263 | if(!Curl_checkProxyheaders(conn, "Proxy-Connection:"))
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| 264 | proxyconn = "Proxy-Connection: Keep-Alive\r\n";
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| 265 |
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| 266 | if(!Curl_checkProxyheaders(conn, "User-Agent:") &&
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| 267 | data->set.str[STRING_USERAGENT])
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| 268 | useragent = conn->allocptr.uagent;
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| 269 |
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| 270 | result =
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| 271 | Curl_add_bufferf(req_buffer,
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| 272 | "CONNECT %s HTTP/%s\r\n"
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| 273 | "%s" /* Host: */
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| 274 | "%s" /* Proxy-Authorization */
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| 275 | "%s" /* User-Agent */
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| 276 | "%s", /* Proxy-Connection */
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| 277 | hostheader,
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| 278 | http,
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| 279 | host?host:"",
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| 280 | conn->allocptr.proxyuserpwd?
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| 281 | conn->allocptr.proxyuserpwd:"",
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| 282 | useragent,
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| 283 | proxyconn);
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| 284 |
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| 285 | if(host)
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| 286 | free(host);
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| 287 | free(hostheader);
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| 288 |
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| 289 | if(!result)
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| 290 | result = Curl_add_custom_headers(conn, TRUE, req_buffer);
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| 291 |
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| 292 | if(!result)
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| 293 | /* CRLF terminate the request */
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| 294 | result = Curl_add_bufferf(req_buffer, "\r\n");
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| 295 |
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| 296 | if(!result) {
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| 297 | /* Send the connect request to the proxy */
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| 298 | /* BLOCKING */
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| 299 | result =
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| 300 | Curl_add_buffer_send(req_buffer, conn,
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| 301 | &data->info.request_size, 0, sockindex);
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| 302 | }
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| 303 | req_buffer = NULL;
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| 304 | if(result)
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| 305 | failf(data, "Failed sending CONNECT to proxy");
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| 306 | }
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| 307 |
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| 308 | Curl_add_buffer_free(req_buffer);
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| 309 | if(result)
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| 310 | return result;
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| 311 |
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| 312 | s->tunnel_state = TUNNEL_CONNECT;
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| 313 | s->perline = 0;
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| 314 | } /* END CONNECT PHASE */
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| 315 |
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| 316 | check = Curl_timeleft(data, NULL, TRUE);
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| 317 | if(check <= 0) {
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| 318 | failf(data, "Proxy CONNECT aborted due to timeout");
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| 319 | return CURLE_OPERATION_TIMEDOUT;
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| 320 | }
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| 321 |
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| 322 | if(!Curl_conn_data_pending(conn, sockindex))
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| 323 | /* return so we'll be called again polling-style */
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| 324 | return CURLE_OK;
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| 325 |
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| 326 | /* at this point, the tunnel_connecting phase is over. */
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| 327 |
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| 328 | { /* READING RESPONSE PHASE */
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| 329 | int error = SELECT_OK;
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| 330 |
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| 331 | while(s->keepon && !error) {
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| 332 | ssize_t gotbytes;
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| 333 |
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| 334 | /* make sure we have space to read more data */
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| 335 | if(s->ptr >= &s->connect_buffer[CONNECT_BUFFER_SIZE]) {
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| 336 | failf(data, "CONNECT response too large!");
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| 337 | return CURLE_RECV_ERROR;
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| 338 | }
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| 339 |
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| 340 | /* Read one byte at a time to avoid a race condition. Wait at most one
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| 341 | second before looping to ensure continuous pgrsUpdates. */
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| 342 | result = Curl_read(conn, tunnelsocket, s->ptr, 1, &gotbytes);
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| 343 | if(result == CURLE_AGAIN)
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| 344 | /* socket buffer drained, return */
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| 345 | return CURLE_OK;
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| 346 |
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| 347 | if(Curl_pgrsUpdate(conn))
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| 348 | return CURLE_ABORTED_BY_CALLBACK;
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| 349 |
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| 350 | if(result) {
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| 351 | s->keepon = FALSE;
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| 352 | break;
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| 353 | }
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| 354 | else if(gotbytes <= 0) {
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| 355 | if(data->set.proxyauth && data->state.authproxy.avail) {
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| 356 | /* proxy auth was requested and there was proxy auth available,
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| 357 | then deem this as "mere" proxy disconnect */
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| 358 | conn->bits.proxy_connect_closed = TRUE;
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| 359 | infof(data, "Proxy CONNECT connection closed\n");
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| 360 | }
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| 361 | else {
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| 362 | error = SELECT_ERROR;
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| 363 | failf(data, "Proxy CONNECT aborted");
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| 364 | }
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| 365 | s->keepon = FALSE;
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| 366 | break;
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| 367 | }
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| 368 |
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| 369 |
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| 370 | if(s->keepon > TRUE) {
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| 371 | /* This means we are currently ignoring a response-body */
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| 372 |
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| 373 | s->ptr = s->connect_buffer;
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| 374 | if(s->cl) {
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| 375 | /* A Content-Length based body: simply count down the counter
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| 376 | and make sure to break out of the loop when we're done! */
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| 377 | s->cl--;
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| 378 | if(s->cl <= 0) {
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| 379 | s->keepon = FALSE;
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| 380 | s->tunnel_state = TUNNEL_COMPLETE;
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| 381 | break;
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| 382 | }
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| 383 | }
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| 384 | else {
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| 385 | /* chunked-encoded body, so we need to do the chunked dance
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| 386 | properly to know when the end of the body is reached */
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| 387 | CHUNKcode r;
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| 388 | ssize_t tookcareof = 0;
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| 389 |
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| 390 | /* now parse the chunked piece of data so that we can
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| 391 | properly tell when the stream ends */
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| 392 | r = Curl_httpchunk_read(conn, s->ptr, 1, &tookcareof);
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| 393 | if(r == CHUNKE_STOP) {
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| 394 | /* we're done reading chunks! */
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| 395 | infof(data, "chunk reading DONE\n");
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| 396 | s->keepon = FALSE;
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| 397 | /* we did the full CONNECT treatment, go COMPLETE */
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| 398 | s->tunnel_state = TUNNEL_COMPLETE;
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| 399 | }
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| 400 | }
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| 401 | continue;
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| 402 | }
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| 403 |
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| 404 | s->perline++; /* amount of bytes in this line so far */
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| 405 |
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| 406 | /* if this is not the end of a header line then continue */
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| 407 | if(*s->ptr != 0x0a) {
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| 408 | s->ptr++;
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| 409 | continue;
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| 410 | }
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| 411 |
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| 412 | /* convert from the network encoding */
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| 413 | result = Curl_convert_from_network(data, s->line_start,
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| 414 | (size_t)s->perline);
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| 415 | /* Curl_convert_from_network calls failf if unsuccessful */
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| 416 | if(result)
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| 417 | return result;
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| 418 |
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| 419 | /* output debug if that is requested */
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| 420 | if(data->set.verbose)
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| 421 | Curl_debug(data, CURLINFO_HEADER_IN,
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| 422 | s->line_start, (size_t)s->perline, conn);
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| 423 |
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| 424 | if(!data->set.suppress_connect_headers) {
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| 425 | /* send the header to the callback */
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| 426 | int writetype = CLIENTWRITE_HEADER;
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| 427 | if(data->set.include_header)
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| 428 | writetype |= CLIENTWRITE_BODY;
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| 429 |
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| 430 | result = Curl_client_write(conn, writetype,
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| 431 | s->line_start, s->perline);
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| 432 | if(result)
|
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| 433 | return result;
|
---|
| 434 | }
|
---|
| 435 |
|
---|
| 436 | data->info.header_size += (long)s->perline;
|
---|
| 437 | data->req.headerbytecount += (long)s->perline;
|
---|
| 438 |
|
---|
| 439 | /* Newlines are CRLF, so the CR is ignored as the line isn't
|
---|
| 440 | really terminated until the LF comes. Treat a following CR
|
---|
| 441 | as end-of-headers as well.*/
|
---|
| 442 |
|
---|
| 443 | if(('\r' == s->line_start[0]) ||
|
---|
| 444 | ('\n' == s->line_start[0])) {
|
---|
| 445 | /* end of response-headers from the proxy */
|
---|
| 446 | s->ptr = s->connect_buffer;
|
---|
| 447 | if((407 == k->httpcode) && !data->state.authproblem) {
|
---|
| 448 | /* If we get a 407 response code with content length
|
---|
| 449 | when we have no auth problem, we must ignore the
|
---|
| 450 | whole response-body */
|
---|
| 451 | s->keepon = 2;
|
---|
| 452 |
|
---|
| 453 | if(s->cl) {
|
---|
| 454 | infof(data, "Ignore %" CURL_FORMAT_CURL_OFF_T
|
---|
| 455 | " bytes of response-body\n", s->cl);
|
---|
| 456 | }
|
---|
| 457 | else if(s->chunked_encoding) {
|
---|
| 458 | CHUNKcode r;
|
---|
| 459 |
|
---|
| 460 | infof(data, "Ignore chunked response-body\n");
|
---|
| 461 |
|
---|
| 462 | /* We set ignorebody true here since the chunked
|
---|
| 463 | decoder function will acknowledge that. Pay
|
---|
| 464 | attention so that this is cleared again when this
|
---|
| 465 | function returns! */
|
---|
| 466 | k->ignorebody = TRUE;
|
---|
| 467 |
|
---|
| 468 | if(s->line_start[1] == '\n') {
|
---|
| 469 | /* this can only be a LF if the letter at index 0
|
---|
| 470 | was a CR */
|
---|
| 471 | s->line_start++;
|
---|
| 472 | }
|
---|
| 473 |
|
---|
| 474 | /* now parse the chunked piece of data so that we can
|
---|
| 475 | properly tell when the stream ends */
|
---|
| 476 | r = Curl_httpchunk_read(conn, s->line_start + 1, 1, &gotbytes);
|
---|
| 477 | if(r == CHUNKE_STOP) {
|
---|
| 478 | /* we're done reading chunks! */
|
---|
| 479 | infof(data, "chunk reading DONE\n");
|
---|
| 480 | s->keepon = FALSE;
|
---|
| 481 | /* we did the full CONNECT treatment, go to COMPLETE */
|
---|
| 482 | s->tunnel_state = TUNNEL_COMPLETE;
|
---|
| 483 | }
|
---|
| 484 | }
|
---|
| 485 | else {
|
---|
| 486 | /* without content-length or chunked encoding, we
|
---|
| 487 | can't keep the connection alive since the close is
|
---|
| 488 | the end signal so we bail out at once instead */
|
---|
| 489 | s->keepon = FALSE;
|
---|
| 490 | }
|
---|
| 491 | }
|
---|
| 492 | else
|
---|
| 493 | s->keepon = FALSE;
|
---|
| 494 | if(!s->cl)
|
---|
| 495 | /* we did the full CONNECT treatment, go to COMPLETE */
|
---|
| 496 | s->tunnel_state = TUNNEL_COMPLETE;
|
---|
| 497 | continue;
|
---|
| 498 | }
|
---|
| 499 |
|
---|
| 500 | s->line_start[s->perline] = 0; /* zero terminate the buffer */
|
---|
| 501 | if((checkprefix("WWW-Authenticate:", s->line_start) &&
|
---|
| 502 | (401 == k->httpcode)) ||
|
---|
| 503 | (checkprefix("Proxy-authenticate:", s->line_start) &&
|
---|
| 504 | (407 == k->httpcode))) {
|
---|
| 505 |
|
---|
| 506 | bool proxy = (k->httpcode == 407) ? TRUE : FALSE;
|
---|
| 507 | char *auth = Curl_copy_header_value(s->line_start);
|
---|
| 508 | if(!auth)
|
---|
| 509 | return CURLE_OUT_OF_MEMORY;
|
---|
| 510 |
|
---|
| 511 | result = Curl_http_input_auth(conn, proxy, auth);
|
---|
| 512 |
|
---|
| 513 | free(auth);
|
---|
| 514 |
|
---|
| 515 | if(result)
|
---|
| 516 | return result;
|
---|
| 517 | }
|
---|
| 518 | else if(checkprefix("Content-Length:", s->line_start)) {
|
---|
| 519 | if(k->httpcode/100 == 2) {
|
---|
| 520 | /* A client MUST ignore any Content-Length or Transfer-Encoding
|
---|
| 521 | header fields received in a successful response to CONNECT.
|
---|
| 522 | "Successful" described as: 2xx (Successful). RFC 7231 4.3.6 */
|
---|
| 523 | infof(data, "Ignoring Content-Length in CONNECT %03d response\n",
|
---|
| 524 | k->httpcode);
|
---|
| 525 | }
|
---|
| 526 | else {
|
---|
| 527 | (void)curlx_strtoofft(s->line_start +
|
---|
| 528 | strlen("Content-Length:"), NULL, 10, &s->cl);
|
---|
| 529 | }
|
---|
| 530 | }
|
---|
| 531 | else if(Curl_compareheader(s->line_start, "Connection:", "close"))
|
---|
| 532 | closeConnection = TRUE;
|
---|
| 533 | else if(checkprefix("Transfer-Encoding:", s->line_start)) {
|
---|
| 534 | if(k->httpcode/100 == 2) {
|
---|
| 535 | /* A client MUST ignore any Content-Length or Transfer-Encoding
|
---|
| 536 | header fields received in a successful response to CONNECT.
|
---|
| 537 | "Successful" described as: 2xx (Successful). RFC 7231 4.3.6 */
|
---|
| 538 | infof(data, "Ignoring Transfer-Encoding in "
|
---|
| 539 | "CONNECT %03d response\n", k->httpcode);
|
---|
| 540 | }
|
---|
| 541 | else if(Curl_compareheader(s->line_start,
|
---|
| 542 | "Transfer-Encoding:", "chunked")) {
|
---|
| 543 | infof(data, "CONNECT responded chunked\n");
|
---|
| 544 | s->chunked_encoding = TRUE;
|
---|
| 545 | /* init our chunky engine */
|
---|
| 546 | Curl_httpchunk_init(conn);
|
---|
| 547 | }
|
---|
| 548 | }
|
---|
| 549 | else if(Curl_compareheader(s->line_start,
|
---|
| 550 | "Proxy-Connection:", "close"))
|
---|
| 551 | closeConnection = TRUE;
|
---|
| 552 | else if(2 == sscanf(s->line_start, "HTTP/1.%d %d",
|
---|
| 553 | &subversion,
|
---|
| 554 | &k->httpcode)) {
|
---|
| 555 | /* store the HTTP code from the proxy */
|
---|
| 556 | data->info.httpproxycode = k->httpcode;
|
---|
| 557 | }
|
---|
| 558 |
|
---|
| 559 | s->perline = 0; /* line starts over here */
|
---|
| 560 | s->ptr = s->connect_buffer;
|
---|
| 561 | s->line_start = s->ptr;
|
---|
| 562 | } /* while there's buffer left and loop is requested */
|
---|
| 563 |
|
---|
| 564 | if(Curl_pgrsUpdate(conn))
|
---|
| 565 | return CURLE_ABORTED_BY_CALLBACK;
|
---|
| 566 |
|
---|
| 567 | if(error)
|
---|
| 568 | return CURLE_RECV_ERROR;
|
---|
| 569 |
|
---|
| 570 | if(data->info.httpproxycode/100 != 2) {
|
---|
| 571 | /* Deal with the possibly already received authenticate
|
---|
| 572 | headers. 'newurl' is set to a new URL if we must loop. */
|
---|
| 573 | result = Curl_http_auth_act(conn);
|
---|
| 574 | if(result)
|
---|
| 575 | return result;
|
---|
| 576 |
|
---|
| 577 | if(conn->bits.close)
|
---|
| 578 | /* the connection has been marked for closure, most likely in the
|
---|
| 579 | Curl_http_auth_act() function and thus we can kill it at once
|
---|
| 580 | below */
|
---|
| 581 | closeConnection = TRUE;
|
---|
| 582 | }
|
---|
| 583 |
|
---|
| 584 | if(closeConnection && data->req.newurl) {
|
---|
| 585 | /* Connection closed by server. Don't use it anymore */
|
---|
| 586 | Curl_closesocket(conn, conn->sock[sockindex]);
|
---|
| 587 | conn->sock[sockindex] = CURL_SOCKET_BAD;
|
---|
| 588 | break;
|
---|
| 589 | }
|
---|
| 590 | } /* END READING RESPONSE PHASE */
|
---|
| 591 |
|
---|
| 592 | /* If we are supposed to continue and request a new URL, which basically
|
---|
| 593 | * means the HTTP authentication is still going on so if the tunnel
|
---|
| 594 | * is complete we start over in INIT state */
|
---|
| 595 | if(data->req.newurl && (TUNNEL_COMPLETE == s->tunnel_state)) {
|
---|
| 596 | connect_init(conn, TRUE); /* reinit */
|
---|
| 597 | }
|
---|
| 598 |
|
---|
| 599 | } while(data->req.newurl);
|
---|
| 600 |
|
---|
| 601 | if(data->info.httpproxycode/100 != 2) {
|
---|
| 602 | if(closeConnection && data->req.newurl) {
|
---|
| 603 | conn->bits.proxy_connect_closed = TRUE;
|
---|
| 604 | infof(data, "Connect me again please\n");
|
---|
| 605 | connect_done(conn);
|
---|
| 606 | }
|
---|
| 607 | else {
|
---|
| 608 | free(data->req.newurl);
|
---|
| 609 | data->req.newurl = NULL;
|
---|
| 610 | /* failure, close this connection to avoid re-use */
|
---|
| 611 | streamclose(conn, "proxy CONNECT failure");
|
---|
| 612 | Curl_closesocket(conn, conn->sock[sockindex]);
|
---|
| 613 | conn->sock[sockindex] = CURL_SOCKET_BAD;
|
---|
| 614 | }
|
---|
| 615 |
|
---|
| 616 | /* to back to init state */
|
---|
| 617 | s->tunnel_state = TUNNEL_INIT;
|
---|
| 618 |
|
---|
| 619 | if(conn->bits.proxy_connect_closed)
|
---|
| 620 | /* this is not an error, just part of the connection negotiation */
|
---|
| 621 | return CURLE_OK;
|
---|
| 622 | failf(data, "Received HTTP code %d from proxy after CONNECT",
|
---|
| 623 | data->req.httpcode);
|
---|
| 624 | return CURLE_RECV_ERROR;
|
---|
| 625 | }
|
---|
| 626 |
|
---|
| 627 | s->tunnel_state = TUNNEL_COMPLETE;
|
---|
| 628 |
|
---|
| 629 | /* If a proxy-authorization header was used for the proxy, then we should
|
---|
| 630 | make sure that it isn't accidentally used for the document request
|
---|
| 631 | after we've connected. So let's free and clear it here. */
|
---|
| 632 | Curl_safefree(conn->allocptr.proxyuserpwd);
|
---|
| 633 | conn->allocptr.proxyuserpwd = NULL;
|
---|
| 634 |
|
---|
| 635 | data->state.authproxy.done = TRUE;
|
---|
| 636 |
|
---|
| 637 | infof(data, "Proxy replied %d to CONNECT request\n",
|
---|
| 638 | data->info.httpproxycode);
|
---|
| 639 | data->req.ignorebody = FALSE; /* put it (back) to non-ignore state */
|
---|
| 640 | conn->bits.rewindaftersend = FALSE; /* make sure this isn't set for the
|
---|
| 641 | document request */
|
---|
| 642 | return CURLE_OK;
|
---|
| 643 | }
|
---|
| 644 |
|
---|
| 645 | void Curl_connect_free(struct Curl_easy *data)
|
---|
| 646 | {
|
---|
| 647 | struct connectdata *conn = data->easy_conn;
|
---|
| 648 | struct http_connect_state *s = conn->connect_state;
|
---|
| 649 | if(s) {
|
---|
| 650 | free(s);
|
---|
| 651 | conn->connect_state = NULL;
|
---|
| 652 | }
|
---|
| 653 | }
|
---|
| 654 |
|
---|
| 655 | /*
|
---|
| 656 | * Curl_proxyCONNECT() requires that we're connected to a HTTP proxy. This
|
---|
| 657 | * function will issue the necessary commands to get a seamless tunnel through
|
---|
| 658 | * this proxy. After that, the socket can be used just as a normal socket.
|
---|
| 659 | */
|
---|
| 660 |
|
---|
| 661 | CURLcode Curl_proxyCONNECT(struct connectdata *conn,
|
---|
| 662 | int sockindex,
|
---|
| 663 | const char *hostname,
|
---|
| 664 | int remote_port)
|
---|
| 665 | {
|
---|
| 666 | CURLcode result;
|
---|
| 667 | if(!conn->connect_state) {
|
---|
| 668 | result = connect_init(conn, FALSE);
|
---|
| 669 | if(result)
|
---|
| 670 | return result;
|
---|
| 671 | }
|
---|
| 672 | result = CONNECT(conn, sockindex, hostname, remote_port);
|
---|
| 673 |
|
---|
| 674 | if(result || Curl_connect_complete(conn))
|
---|
| 675 | connect_done(conn);
|
---|
| 676 |
|
---|
| 677 | return result;
|
---|
| 678 | }
|
---|
| 679 |
|
---|
| 680 | #else
|
---|
| 681 | void Curl_connect_free(struct Curl_easy *data)
|
---|
| 682 | {
|
---|
| 683 | (void)data;
|
---|
| 684 | }
|
---|
| 685 |
|
---|
| 686 | #endif /* CURL_DISABLE_PROXY */
|
---|