1457 lines
44 KiB
C
1457 lines
44 KiB
C
/***************************************************************************
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* _ _ ____ _
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* Project ___| | | | _ \| |
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* / __| | | | |_) | |
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* | (__| |_| | _ <| |___
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* \___|\___/|_| \_\_____|
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*
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* Copyright (C) 1998 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al.
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*
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* This software is licensed as described in the file COPYING, which
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* you should have received as part of this distribution. The terms
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* are also available at https://curl.haxx.se/docs/copyright.html.
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*
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* You may opt to use, copy, modify, merge, publish, distribute and/or sell
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* copies of the Software, and permit persons to whom the Software is
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* furnished to do so, under the terms of the COPYING file.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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***************************************************************************/
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#include "curl_setup.h"
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#ifdef HAVE_NETINET_IN_H
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#include <netinet/in.h> /* <netinet/tcp.h> may need it */
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#endif
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#ifdef HAVE_SYS_UN_H
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#include <sys/un.h> /* for sockaddr_un */
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#endif
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#ifdef HAVE_LINUX_TCP_H
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#include <linux/tcp.h>
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#elif defined(HAVE_NETINET_TCP_H)
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#include <netinet/tcp.h>
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#endif
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#ifdef HAVE_SYS_IOCTL_H
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#include <sys/ioctl.h>
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#endif
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#ifdef HAVE_NETDB_H
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#include <netdb.h>
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#endif
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#ifdef HAVE_FCNTL_H
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#include <fcntl.h>
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#endif
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#ifdef HAVE_ARPA_INET_H
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#include <arpa/inet.h>
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#endif
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#if (defined(HAVE_IOCTL_FIONBIO) && defined(NETWARE))
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#include <sys/filio.h>
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#endif
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#ifdef NETWARE
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#undef in_addr_t
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#define in_addr_t unsigned long
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#endif
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#ifdef __VMS
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#include <in.h>
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#include <inet.h>
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#endif
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#include "urldata.h"
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#include "sendf.h"
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#include "if2ip.h"
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#include "strerror.h"
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#include "connect.h"
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#include "select.h"
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#include "url.h" /* for Curl_safefree() */
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#include "multiif.h"
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#include "sockaddr.h" /* required for Curl_sockaddr_storage */
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#include "inet_ntop.h"
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#include "inet_pton.h"
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#include "vtls/vtls.h" /* for Curl_ssl_check_cxn() */
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#include "progress.h"
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#include "warnless.h"
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#include "conncache.h"
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#include "multihandle.h"
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#include "system_win32.h"
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/* The last 3 #include files should be in this order */
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#include "curl_printf.h"
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#include "curl_memory.h"
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#include "memdebug.h"
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#ifdef __SYMBIAN32__
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/* This isn't actually supported under Symbian OS */
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#undef SO_NOSIGPIPE
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#endif
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static bool verifyconnect(curl_socket_t sockfd, int *error);
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#if defined(__DragonFly__) || defined(HAVE_WINSOCK_H)
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/* DragonFlyBSD and Windows use millisecond units */
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#define KEEPALIVE_FACTOR(x) (x *= 1000)
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#else
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#define KEEPALIVE_FACTOR(x)
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#endif
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#if defined(HAVE_WINSOCK2_H) && !defined(SIO_KEEPALIVE_VALS)
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#define SIO_KEEPALIVE_VALS _WSAIOW(IOC_VENDOR,4)
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struct tcp_keepalive {
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u_long onoff;
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u_long keepalivetime;
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u_long keepaliveinterval;
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};
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#endif
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static void
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tcpkeepalive(struct Curl_easy *data,
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curl_socket_t sockfd)
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{
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int optval = data->set.tcp_keepalive?1:0;
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/* only set IDLE and INTVL if setting KEEPALIVE is successful */
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if(setsockopt(sockfd, SOL_SOCKET, SO_KEEPALIVE,
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(void *)&optval, sizeof(optval)) < 0) {
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infof(data, "Failed to set SO_KEEPALIVE on fd %d\n", sockfd);
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}
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else {
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#if defined(SIO_KEEPALIVE_VALS)
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struct tcp_keepalive vals;
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DWORD dummy;
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vals.onoff = 1;
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optval = curlx_sltosi(data->set.tcp_keepidle);
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KEEPALIVE_FACTOR(optval);
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vals.keepalivetime = optval;
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optval = curlx_sltosi(data->set.tcp_keepintvl);
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KEEPALIVE_FACTOR(optval);
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vals.keepaliveinterval = optval;
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if(WSAIoctl(sockfd, SIO_KEEPALIVE_VALS, (LPVOID) &vals, sizeof(vals),
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NULL, 0, &dummy, NULL, NULL) != 0) {
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infof(data, "Failed to set SIO_KEEPALIVE_VALS on fd %d: %d\n",
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(int)sockfd, WSAGetLastError());
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}
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#else
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#ifdef TCP_KEEPIDLE
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optval = curlx_sltosi(data->set.tcp_keepidle);
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KEEPALIVE_FACTOR(optval);
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if(setsockopt(sockfd, IPPROTO_TCP, TCP_KEEPIDLE,
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(void *)&optval, sizeof(optval)) < 0) {
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infof(data, "Failed to set TCP_KEEPIDLE on fd %d\n", sockfd);
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}
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#endif
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#ifdef TCP_KEEPINTVL
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optval = curlx_sltosi(data->set.tcp_keepintvl);
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KEEPALIVE_FACTOR(optval);
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if(setsockopt(sockfd, IPPROTO_TCP, TCP_KEEPINTVL,
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(void *)&optval, sizeof(optval)) < 0) {
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infof(data, "Failed to set TCP_KEEPINTVL on fd %d\n", sockfd);
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}
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#endif
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#ifdef TCP_KEEPALIVE
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/* Mac OS X style */
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optval = curlx_sltosi(data->set.tcp_keepidle);
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KEEPALIVE_FACTOR(optval);
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if(setsockopt(sockfd, IPPROTO_TCP, TCP_KEEPALIVE,
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(void *)&optval, sizeof(optval)) < 0) {
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infof(data, "Failed to set TCP_KEEPALIVE on fd %d\n", sockfd);
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}
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#endif
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#endif
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}
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}
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static CURLcode
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singleipconnect(struct connectdata *conn,
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const Curl_addrinfo *ai, /* start connecting to this */
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curl_socket_t *sock);
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/*
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* Curl_timeleft() returns the amount of milliseconds left allowed for the
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* transfer/connection. If the value is negative, the timeout time has already
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* elapsed.
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*
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* The start time is stored in progress.t_startsingle - as set with
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* Curl_pgrsTime(..., TIMER_STARTSINGLE);
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*
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* If 'nowp' is non-NULL, it points to the current time.
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* 'duringconnect' is FALSE if not during a connect, as then of course the
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* connect timeout is not taken into account!
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*
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* @unittest: 1303
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*/
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timediff_t Curl_timeleft(struct Curl_easy *data,
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struct curltime *nowp,
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bool duringconnect)
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{
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int timeout_set = 0;
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timediff_t timeout_ms = duringconnect?DEFAULT_CONNECT_TIMEOUT:0;
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struct curltime now;
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/* if a timeout is set, use the most restrictive one */
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if(data->set.timeout > 0)
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timeout_set |= 1;
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if(duringconnect && (data->set.connecttimeout > 0))
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timeout_set |= 2;
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switch(timeout_set) {
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case 1:
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timeout_ms = data->set.timeout;
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break;
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case 2:
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timeout_ms = data->set.connecttimeout;
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break;
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case 3:
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if(data->set.timeout < data->set.connecttimeout)
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timeout_ms = data->set.timeout;
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else
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timeout_ms = data->set.connecttimeout;
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break;
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default:
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/* use the default */
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if(!duringconnect)
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/* if we're not during connect, there's no default timeout so if we're
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at zero we better just return zero and not make it a negative number
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by the math below */
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return 0;
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break;
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}
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if(!nowp) {
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now = Curl_now();
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nowp = &now;
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}
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/* subtract elapsed time */
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if(duringconnect)
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/* since this most recent connect started */
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timeout_ms -= Curl_timediff(*nowp, data->progress.t_startsingle);
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else
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/* since the entire operation started */
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timeout_ms -= Curl_timediff(*nowp, data->progress.t_startop);
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if(!timeout_ms)
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/* avoid returning 0 as that means no timeout! */
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return -1;
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return timeout_ms;
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}
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static CURLcode bindlocal(struct connectdata *conn,
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curl_socket_t sockfd, int af, unsigned int scope)
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{
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struct Curl_easy *data = conn->data;
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struct Curl_sockaddr_storage sa;
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struct sockaddr *sock = (struct sockaddr *)&sa; /* bind to this address */
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curl_socklen_t sizeof_sa = 0; /* size of the data sock points to */
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struct sockaddr_in *si4 = (struct sockaddr_in *)&sa;
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#ifdef ENABLE_IPV6
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struct sockaddr_in6 *si6 = (struct sockaddr_in6 *)&sa;
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#endif
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struct Curl_dns_entry *h = NULL;
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unsigned short port = data->set.localport; /* use this port number, 0 for
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"random" */
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/* how many port numbers to try to bind to, increasing one at a time */
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int portnum = data->set.localportrange;
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const char *dev = data->set.str[STRING_DEVICE];
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int error;
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/*************************************************************
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* Select device to bind socket to
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*************************************************************/
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if(!dev && !port)
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/* no local kind of binding was requested */
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return CURLE_OK;
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memset(&sa, 0, sizeof(struct Curl_sockaddr_storage));
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if(dev && (strlen(dev)<255) ) {
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char myhost[256] = "";
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int done = 0; /* -1 for error, 1 for address found */
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bool is_interface = FALSE;
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bool is_host = FALSE;
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static const char *if_prefix = "if!";
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static const char *host_prefix = "host!";
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if(strncmp(if_prefix, dev, strlen(if_prefix)) == 0) {
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dev += strlen(if_prefix);
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is_interface = TRUE;
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}
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else if(strncmp(host_prefix, dev, strlen(host_prefix)) == 0) {
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dev += strlen(host_prefix);
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is_host = TRUE;
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}
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/* interface */
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if(!is_host) {
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#ifdef SO_BINDTODEVICE
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/* I am not sure any other OSs than Linux that provide this feature,
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* and at the least I cannot test. --Ben
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*
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* This feature allows one to tightly bind the local socket to a
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* particular interface. This will force even requests to other
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* local interfaces to go out the external interface.
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*
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*
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* Only bind to the interface when specified as interface, not just
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* as a hostname or ip address.
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*
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* interface might be a VRF, eg: vrf-blue, which means it cannot be
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* converted to an IP address and would fail Curl_if2ip. Simply try
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* to use it straight away.
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*/
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if(setsockopt(sockfd, SOL_SOCKET, SO_BINDTODEVICE,
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dev, (curl_socklen_t)strlen(dev) + 1) == 0) {
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/* This is typically "errno 1, error: Operation not permitted" if
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* you're not running as root or another suitable privileged
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* user.
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* If it succeeds it means the parameter was a valid interface and
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* not an IP address. Return immediately.
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*/
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return CURLE_OK;
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}
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#endif
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switch(Curl_if2ip(af, scope, conn->scope_id, dev,
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myhost, sizeof(myhost))) {
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case IF2IP_NOT_FOUND:
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if(is_interface) {
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/* Do not fall back to treating it as a host name */
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failf(data, "Couldn't bind to interface '%s'", dev);
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return CURLE_INTERFACE_FAILED;
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}
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break;
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case IF2IP_AF_NOT_SUPPORTED:
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/* Signal the caller to try another address family if available */
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return CURLE_UNSUPPORTED_PROTOCOL;
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case IF2IP_FOUND:
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is_interface = TRUE;
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/*
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* We now have the numerical IP address in the 'myhost' buffer
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*/
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infof(data, "Local Interface %s is ip %s using address family %i\n",
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dev, myhost, af);
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done = 1;
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break;
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}
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}
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if(!is_interface) {
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/*
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* This was not an interface, resolve the name as a host name
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* or IP number
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*
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* Temporarily force name resolution to use only the address type
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* of the connection. The resolve functions should really be changed
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* to take a type parameter instead.
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*/
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long ipver = conn->ip_version;
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int rc;
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if(af == AF_INET)
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conn->ip_version = CURL_IPRESOLVE_V4;
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#ifdef ENABLE_IPV6
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else if(af == AF_INET6)
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conn->ip_version = CURL_IPRESOLVE_V6;
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#endif
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rc = Curl_resolv(conn, dev, 0, &h);
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if(rc == CURLRESOLV_PENDING)
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(void)Curl_resolver_wait_resolv(conn, &h);
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conn->ip_version = ipver;
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if(h) {
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/* convert the resolved address, sizeof myhost >= INET_ADDRSTRLEN */
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Curl_printable_address(h->addr, myhost, sizeof(myhost));
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infof(data, "Name '%s' family %i resolved to '%s' family %i\n",
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dev, af, myhost, h->addr->ai_family);
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Curl_resolv_unlock(data, h);
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done = 1;
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}
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else {
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/*
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* provided dev was no interface (or interfaces are not supported
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* e.g. solaris) no ip address and no domain we fail here
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*/
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done = -1;
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}
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}
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if(done > 0) {
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#ifdef ENABLE_IPV6
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/* IPv6 address */
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if(af == AF_INET6) {
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#ifdef HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID
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char *scope_ptr = strchr(myhost, '%');
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if(scope_ptr)
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*(scope_ptr++) = 0;
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#endif
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if(Curl_inet_pton(AF_INET6, myhost, &si6->sin6_addr) > 0) {
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si6->sin6_family = AF_INET6;
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si6->sin6_port = htons(port);
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#ifdef HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID
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if(scope_ptr)
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/* The "myhost" string either comes from Curl_if2ip or from
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Curl_printable_address. The latter returns only numeric scope
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IDs and the former returns none at all. So the scope ID, if
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present, is known to be numeric */
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si6->sin6_scope_id = atoi(scope_ptr);
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#endif
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}
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sizeof_sa = sizeof(struct sockaddr_in6);
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}
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else
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#endif
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/* IPv4 address */
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if((af == AF_INET) &&
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(Curl_inet_pton(AF_INET, myhost, &si4->sin_addr) > 0)) {
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si4->sin_family = AF_INET;
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si4->sin_port = htons(port);
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sizeof_sa = sizeof(struct sockaddr_in);
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}
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}
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if(done < 1) {
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/* errorbuf is set false so failf will overwrite any message already in
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the error buffer, so the user receives this error message instead of a
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generic resolve error. */
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data->state.errorbuf = FALSE;
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failf(data, "Couldn't bind to '%s'", dev);
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return CURLE_INTERFACE_FAILED;
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}
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}
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else {
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/* no device was given, prepare sa to match af's needs */
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#ifdef ENABLE_IPV6
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if(af == AF_INET6) {
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si6->sin6_family = AF_INET6;
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si6->sin6_port = htons(port);
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sizeof_sa = sizeof(struct sockaddr_in6);
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}
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else
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#endif
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if(af == AF_INET) {
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si4->sin_family = AF_INET;
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si4->sin_port = htons(port);
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sizeof_sa = sizeof(struct sockaddr_in);
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}
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}
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for(;;) {
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if(bind(sockfd, sock, sizeof_sa) >= 0) {
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/* we succeeded to bind */
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struct Curl_sockaddr_storage add;
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curl_socklen_t size = sizeof(add);
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memset(&add, 0, sizeof(struct Curl_sockaddr_storage));
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if(getsockname(sockfd, (struct sockaddr *) &add, &size) < 0) {
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char buffer[STRERROR_LEN];
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data->state.os_errno = error = SOCKERRNO;
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failf(data, "getsockname() failed with errno %d: %s",
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error, Curl_strerror(error, buffer, sizeof(buffer)));
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return CURLE_INTERFACE_FAILED;
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}
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infof(data, "Local port: %hu\n", port);
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conn->bits.bound = TRUE;
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return CURLE_OK;
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}
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if(--portnum > 0) {
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infof(data, "Bind to local port %hu failed, trying next\n", port);
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port++; /* try next port */
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/* We re-use/clobber the port variable here below */
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if(sock->sa_family == AF_INET)
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si4->sin_port = ntohs(port);
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#ifdef ENABLE_IPV6
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else
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si6->sin6_port = ntohs(port);
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#endif
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}
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else
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break;
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}
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{
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char buffer[STRERROR_LEN];
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data->state.os_errno = error = SOCKERRNO;
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failf(data, "bind failed with errno %d: %s",
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error, Curl_strerror(error, buffer, sizeof(buffer)));
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}
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return CURLE_INTERFACE_FAILED;
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}
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|
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/*
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* verifyconnect() returns TRUE if the connect really has happened.
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*/
|
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static bool verifyconnect(curl_socket_t sockfd, int *error)
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{
|
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bool rc = TRUE;
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#ifdef SO_ERROR
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int err = 0;
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curl_socklen_t errSize = sizeof(err);
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|
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#ifdef WIN32
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/*
|
|
* In October 2003 we effectively nullified this function on Windows due to
|
|
* problems with it using all CPU in multi-threaded cases.
|
|
*
|
|
* In May 2004, we bring it back to offer more info back on connect failures.
|
|
* Gisle Vanem could reproduce the former problems with this function, but
|
|
* could avoid them by adding this SleepEx() call below:
|
|
*
|
|
* "I don't have Rational Quantify, but the hint from his post was
|
|
* ntdll::NtRemoveIoCompletion(). So I'd assume the SleepEx (or maybe
|
|
* just Sleep(0) would be enough?) would release whatever
|
|
* mutex/critical-section the ntdll call is waiting on.
|
|
*
|
|
* Someone got to verify this on Win-NT 4.0, 2000."
|
|
*/
|
|
|
|
#ifdef _WIN32_WCE
|
|
Sleep(0);
|
|
#else
|
|
SleepEx(0, FALSE);
|
|
#endif
|
|
|
|
#endif
|
|
|
|
if(0 != getsockopt(sockfd, SOL_SOCKET, SO_ERROR, (void *)&err, &errSize))
|
|
err = SOCKERRNO;
|
|
#ifdef _WIN32_WCE
|
|
/* Old WinCE versions don't support SO_ERROR */
|
|
if(WSAENOPROTOOPT == err) {
|
|
SET_SOCKERRNO(0);
|
|
err = 0;
|
|
}
|
|
#endif
|
|
#if defined(EBADIOCTL) && defined(__minix)
|
|
/* Minix 3.1.x doesn't support getsockopt on UDP sockets */
|
|
if(EBADIOCTL == err) {
|
|
SET_SOCKERRNO(0);
|
|
err = 0;
|
|
}
|
|
#endif
|
|
if((0 == err) || (EISCONN == err))
|
|
/* we are connected, awesome! */
|
|
rc = TRUE;
|
|
else
|
|
/* This wasn't a successful connect */
|
|
rc = FALSE;
|
|
if(error)
|
|
*error = err;
|
|
#else
|
|
(void)sockfd;
|
|
if(error)
|
|
*error = SOCKERRNO;
|
|
#endif
|
|
return rc;
|
|
}
|
|
|
|
/* Used within the multi interface. Try next IP address, return TRUE if no
|
|
more address exists or error */
|
|
static CURLcode trynextip(struct connectdata *conn,
|
|
int sockindex,
|
|
int tempindex)
|
|
{
|
|
const int other = tempindex ^ 1;
|
|
CURLcode result = CURLE_COULDNT_CONNECT;
|
|
|
|
/* First clean up after the failed socket.
|
|
Don't close it yet to ensure that the next IP's socket gets a different
|
|
file descriptor, which can prevent bugs when the curl_multi_socket_action
|
|
interface is used with certain select() replacements such as kqueue. */
|
|
curl_socket_t fd_to_close = conn->tempsock[tempindex];
|
|
conn->tempsock[tempindex] = CURL_SOCKET_BAD;
|
|
|
|
if(sockindex == FIRSTSOCKET) {
|
|
Curl_addrinfo *ai = NULL;
|
|
int family = AF_UNSPEC;
|
|
|
|
if(conn->tempaddr[tempindex]) {
|
|
/* find next address in the same protocol family */
|
|
family = conn->tempaddr[tempindex]->ai_family;
|
|
ai = conn->tempaddr[tempindex]->ai_next;
|
|
}
|
|
#ifdef ENABLE_IPV6
|
|
else if(conn->tempaddr[0]) {
|
|
/* happy eyeballs - try the other protocol family */
|
|
int firstfamily = conn->tempaddr[0]->ai_family;
|
|
family = (firstfamily == AF_INET) ? AF_INET6 : AF_INET;
|
|
ai = conn->tempaddr[0]->ai_next;
|
|
}
|
|
#endif
|
|
|
|
while(ai) {
|
|
if(conn->tempaddr[other]) {
|
|
/* we can safely skip addresses of the other protocol family */
|
|
while(ai && ai->ai_family != family)
|
|
ai = ai->ai_next;
|
|
}
|
|
|
|
if(ai) {
|
|
result = singleipconnect(conn, ai, &conn->tempsock[tempindex]);
|
|
if(result == CURLE_COULDNT_CONNECT) {
|
|
ai = ai->ai_next;
|
|
continue;
|
|
}
|
|
|
|
conn->tempaddr[tempindex] = ai;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
if(fd_to_close != CURL_SOCKET_BAD)
|
|
Curl_closesocket(conn, fd_to_close);
|
|
|
|
return result;
|
|
}
|
|
|
|
/* Copies connection info into the session handle to make it available
|
|
when the session handle is no longer associated with a connection. */
|
|
void Curl_persistconninfo(struct connectdata *conn)
|
|
{
|
|
memcpy(conn->data->info.conn_primary_ip, conn->primary_ip, MAX_IPADR_LEN);
|
|
memcpy(conn->data->info.conn_local_ip, conn->local_ip, MAX_IPADR_LEN);
|
|
conn->data->info.conn_scheme = conn->handler->scheme;
|
|
conn->data->info.conn_protocol = conn->handler->protocol;
|
|
conn->data->info.conn_primary_port = conn->primary_port;
|
|
conn->data->info.conn_local_port = conn->local_port;
|
|
}
|
|
|
|
UNITTEST bool getaddressinfo(struct sockaddr *sa, char *addr,
|
|
long *port);
|
|
|
|
/* retrieves ip address and port from a sockaddr structure.
|
|
note it calls Curl_inet_ntop which sets errno on fail, not SOCKERRNO. */
|
|
UNITTEST bool getaddressinfo(struct sockaddr *sa, char *addr,
|
|
long *port)
|
|
{
|
|
unsigned short us_port;
|
|
struct sockaddr_in *si = NULL;
|
|
#ifdef ENABLE_IPV6
|
|
struct sockaddr_in6 *si6 = NULL;
|
|
#endif
|
|
#if defined(HAVE_SYS_UN_H) && defined(AF_UNIX)
|
|
struct sockaddr_un *su = NULL;
|
|
#endif
|
|
|
|
switch(sa->sa_family) {
|
|
case AF_INET:
|
|
si = (struct sockaddr_in *)(void *) sa;
|
|
if(Curl_inet_ntop(sa->sa_family, &si->sin_addr,
|
|
addr, MAX_IPADR_LEN)) {
|
|
us_port = ntohs(si->sin_port);
|
|
*port = us_port;
|
|
return TRUE;
|
|
}
|
|
break;
|
|
#ifdef ENABLE_IPV6
|
|
case AF_INET6:
|
|
si6 = (struct sockaddr_in6 *)(void *) sa;
|
|
if(Curl_inet_ntop(sa->sa_family, &si6->sin6_addr,
|
|
addr, MAX_IPADR_LEN)) {
|
|
us_port = ntohs(si6->sin6_port);
|
|
*port = us_port;
|
|
return TRUE;
|
|
}
|
|
break;
|
|
#endif
|
|
#if defined(HAVE_SYS_UN_H) && defined(AF_UNIX)
|
|
case AF_UNIX:
|
|
su = (struct sockaddr_un*)sa;
|
|
msnprintf(addr, MAX_IPADR_LEN, "%s", su->sun_path);
|
|
*port = 0;
|
|
return TRUE;
|
|
#endif
|
|
default:
|
|
break;
|
|
}
|
|
|
|
addr[0] = '\0';
|
|
*port = 0;
|
|
errno = EAFNOSUPPORT;
|
|
return FALSE;
|
|
}
|
|
|
|
/* retrieves the start/end point information of a socket of an established
|
|
connection */
|
|
void Curl_updateconninfo(struct connectdata *conn, curl_socket_t sockfd)
|
|
{
|
|
curl_socklen_t len;
|
|
struct Curl_sockaddr_storage ssrem;
|
|
struct Curl_sockaddr_storage ssloc;
|
|
struct Curl_easy *data = conn->data;
|
|
|
|
if(conn->socktype == SOCK_DGRAM)
|
|
/* there's no connection! */
|
|
return;
|
|
|
|
if(!conn->bits.reuse && !conn->bits.tcp_fastopen) {
|
|
char buffer[STRERROR_LEN];
|
|
len = sizeof(struct Curl_sockaddr_storage);
|
|
if(getpeername(sockfd, (struct sockaddr*) &ssrem, &len)) {
|
|
int error = SOCKERRNO;
|
|
failf(data, "getpeername() failed with errno %d: %s",
|
|
error, Curl_strerror(error, buffer, sizeof(buffer)));
|
|
return;
|
|
}
|
|
|
|
len = sizeof(struct Curl_sockaddr_storage);
|
|
memset(&ssloc, 0, sizeof(ssloc));
|
|
if(getsockname(sockfd, (struct sockaddr*) &ssloc, &len)) {
|
|
int error = SOCKERRNO;
|
|
failf(data, "getsockname() failed with errno %d: %s",
|
|
error, Curl_strerror(error, buffer, sizeof(buffer)));
|
|
return;
|
|
}
|
|
|
|
if(!getaddressinfo((struct sockaddr*)&ssrem,
|
|
conn->primary_ip, &conn->primary_port)) {
|
|
failf(data, "ssrem inet_ntop() failed with errno %d: %s",
|
|
errno, Curl_strerror(errno, buffer, sizeof(buffer)));
|
|
return;
|
|
}
|
|
memcpy(conn->ip_addr_str, conn->primary_ip, MAX_IPADR_LEN);
|
|
|
|
if(!getaddressinfo((struct sockaddr*)&ssloc,
|
|
conn->local_ip, &conn->local_port)) {
|
|
failf(data, "ssloc inet_ntop() failed with errno %d: %s",
|
|
errno, Curl_strerror(errno, buffer, sizeof(buffer)));
|
|
return;
|
|
}
|
|
|
|
}
|
|
|
|
/* persist connection info in session handle */
|
|
Curl_persistconninfo(conn);
|
|
}
|
|
|
|
/*
|
|
* Curl_is_connected() checks if the socket has connected.
|
|
*/
|
|
|
|
CURLcode Curl_is_connected(struct connectdata *conn,
|
|
int sockindex,
|
|
bool *connected)
|
|
{
|
|
struct Curl_easy *data = conn->data;
|
|
CURLcode result = CURLE_OK;
|
|
timediff_t allow;
|
|
int error = 0;
|
|
struct curltime now;
|
|
int rc;
|
|
int i;
|
|
|
|
DEBUGASSERT(sockindex >= FIRSTSOCKET && sockindex <= SECONDARYSOCKET);
|
|
|
|
*connected = FALSE; /* a very negative world view is best */
|
|
|
|
if(conn->bits.tcpconnect[sockindex]) {
|
|
/* we are connected already! */
|
|
*connected = TRUE;
|
|
return CURLE_OK;
|
|
}
|
|
|
|
now = Curl_now();
|
|
|
|
/* figure out how long time we have left to connect */
|
|
allow = Curl_timeleft(data, &now, TRUE);
|
|
|
|
if(allow < 0) {
|
|
/* time-out, bail out, go home */
|
|
failf(data, "Connection time-out");
|
|
return CURLE_OPERATION_TIMEDOUT;
|
|
}
|
|
|
|
for(i = 0; i<2; i++) {
|
|
const int other = i ^ 1;
|
|
if(conn->tempsock[i] == CURL_SOCKET_BAD)
|
|
continue;
|
|
|
|
#ifdef mpeix
|
|
/* Call this function once now, and ignore the results. We do this to
|
|
"clear" the error state on the socket so that we can later read it
|
|
reliably. This is reported necessary on the MPE/iX operating system. */
|
|
(void)verifyconnect(conn->tempsock[i], NULL);
|
|
#endif
|
|
|
|
/* check socket for connect */
|
|
rc = SOCKET_WRITABLE(conn->tempsock[i], 0);
|
|
|
|
if(rc == 0) { /* no connection yet */
|
|
error = 0;
|
|
if(Curl_timediff(now, conn->connecttime) >= conn->timeoutms_per_addr) {
|
|
infof(data, "After %ldms connect time, move on!\n",
|
|
conn->timeoutms_per_addr);
|
|
error = ETIMEDOUT;
|
|
}
|
|
|
|
/* should we try another protocol family? */
|
|
if(i == 0 && conn->tempaddr[1] == NULL &&
|
|
(Curl_timediff(now, conn->connecttime) >=
|
|
data->set.happy_eyeballs_timeout)) {
|
|
trynextip(conn, sockindex, 1);
|
|
}
|
|
}
|
|
else if(rc == CURL_CSELECT_OUT || conn->bits.tcp_fastopen) {
|
|
if(verifyconnect(conn->tempsock[i], &error)) {
|
|
/* we are connected with TCP, awesome! */
|
|
|
|
/* use this socket from now on */
|
|
conn->sock[sockindex] = conn->tempsock[i];
|
|
conn->ip_addr = conn->tempaddr[i];
|
|
conn->tempsock[i] = CURL_SOCKET_BAD;
|
|
#ifdef ENABLE_IPV6
|
|
conn->bits.ipv6 = (conn->ip_addr->ai_family == AF_INET6)?TRUE:FALSE;
|
|
#endif
|
|
|
|
/* close the other socket, if open */
|
|
if(conn->tempsock[other] != CURL_SOCKET_BAD) {
|
|
Curl_closesocket(conn, conn->tempsock[other]);
|
|
conn->tempsock[other] = CURL_SOCKET_BAD;
|
|
}
|
|
|
|
/* see if we need to do any proxy magic first once we connected */
|
|
result = Curl_connected_proxy(conn, sockindex);
|
|
if(result)
|
|
return result;
|
|
|
|
conn->bits.tcpconnect[sockindex] = TRUE;
|
|
|
|
*connected = TRUE;
|
|
if(sockindex == FIRSTSOCKET)
|
|
Curl_pgrsTime(data, TIMER_CONNECT); /* connect done */
|
|
Curl_updateconninfo(conn, conn->sock[sockindex]);
|
|
Curl_verboseconnect(conn);
|
|
|
|
return CURLE_OK;
|
|
}
|
|
infof(data, "Connection failed\n");
|
|
}
|
|
else if(rc & CURL_CSELECT_ERR)
|
|
(void)verifyconnect(conn->tempsock[i], &error);
|
|
|
|
/*
|
|
* The connection failed here, we should attempt to connect to the "next
|
|
* address" for the given host. But first remember the latest error.
|
|
*/
|
|
if(error) {
|
|
data->state.os_errno = error;
|
|
SET_SOCKERRNO(error);
|
|
if(conn->tempaddr[i]) {
|
|
CURLcode status;
|
|
char ipaddress[MAX_IPADR_LEN];
|
|
char buffer[STRERROR_LEN];
|
|
Curl_printable_address(conn->tempaddr[i], ipaddress, MAX_IPADR_LEN);
|
|
infof(data, "connect to %s port %ld failed: %s\n",
|
|
ipaddress, conn->port,
|
|
Curl_strerror(error, buffer, sizeof(buffer)));
|
|
|
|
conn->timeoutms_per_addr = conn->tempaddr[i]->ai_next == NULL ?
|
|
allow : allow / 2;
|
|
|
|
status = trynextip(conn, sockindex, i);
|
|
if(status != CURLE_COULDNT_CONNECT
|
|
|| conn->tempsock[other] == CURL_SOCKET_BAD)
|
|
/* the last attempt failed and no other sockets remain open */
|
|
result = status;
|
|
}
|
|
}
|
|
}
|
|
|
|
if(result) {
|
|
/* no more addresses to try */
|
|
const char *hostname;
|
|
char buffer[STRERROR_LEN];
|
|
|
|
/* if the first address family runs out of addresses to try before
|
|
the happy eyeball timeout, go ahead and try the next family now */
|
|
if(conn->tempaddr[1] == NULL) {
|
|
result = trynextip(conn, sockindex, 1);
|
|
if(!result)
|
|
return result;
|
|
}
|
|
|
|
if(conn->bits.socksproxy)
|
|
hostname = conn->socks_proxy.host.name;
|
|
else if(conn->bits.httpproxy)
|
|
hostname = conn->http_proxy.host.name;
|
|
else if(conn->bits.conn_to_host)
|
|
hostname = conn->conn_to_host.name;
|
|
else
|
|
hostname = conn->host.name;
|
|
|
|
failf(data, "Failed to connect to %s port %ld: %s",
|
|
hostname, conn->port,
|
|
Curl_strerror(error, buffer, sizeof(buffer)));
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
static void tcpnodelay(struct connectdata *conn, curl_socket_t sockfd)
|
|
{
|
|
#if defined(TCP_NODELAY)
|
|
#if !defined(CURL_DISABLE_VERBOSE_STRINGS)
|
|
struct Curl_easy *data = conn->data;
|
|
#endif
|
|
curl_socklen_t onoff = (curl_socklen_t) 1;
|
|
int level = IPPROTO_TCP;
|
|
char buffer[STRERROR_LEN];
|
|
|
|
#if defined(CURL_DISABLE_VERBOSE_STRINGS)
|
|
(void) conn;
|
|
#endif
|
|
|
|
if(setsockopt(sockfd, level, TCP_NODELAY, (void *)&onoff,
|
|
sizeof(onoff)) < 0)
|
|
infof(data, "Could not set TCP_NODELAY: %s\n",
|
|
Curl_strerror(SOCKERRNO, buffer, sizeof(buffer)));
|
|
else
|
|
infof(data, "TCP_NODELAY set\n");
|
|
#else
|
|
(void)conn;
|
|
(void)sockfd;
|
|
#endif
|
|
}
|
|
|
|
#ifdef SO_NOSIGPIPE
|
|
/* The preferred method on Mac OS X (10.2 and later) to prevent SIGPIPEs when
|
|
sending data to a dead peer (instead of relying on the 4th argument to send
|
|
being MSG_NOSIGNAL). Possibly also existing and in use on other BSD
|
|
systems? */
|
|
static void nosigpipe(struct connectdata *conn,
|
|
curl_socket_t sockfd)
|
|
{
|
|
struct Curl_easy *data = conn->data;
|
|
int onoff = 1;
|
|
if(setsockopt(sockfd, SOL_SOCKET, SO_NOSIGPIPE, (void *)&onoff,
|
|
sizeof(onoff)) < 0) {
|
|
char buffer[STRERROR_LEN];
|
|
infof(data, "Could not set SO_NOSIGPIPE: %s\n",
|
|
Curl_strerror(SOCKERRNO, buffer, sizeof(buffer)));
|
|
}
|
|
}
|
|
#else
|
|
#define nosigpipe(x,y) Curl_nop_stmt
|
|
#endif
|
|
|
|
#ifdef USE_WINSOCK
|
|
/* When you run a program that uses the Windows Sockets API, you may
|
|
experience slow performance when you copy data to a TCP server.
|
|
|
|
https://support.microsoft.com/kb/823764
|
|
|
|
Work-around: Make the Socket Send Buffer Size Larger Than the Program Send
|
|
Buffer Size
|
|
|
|
The problem described in this knowledge-base is applied only to pre-Vista
|
|
Windows. Following function trying to detect OS version and skips
|
|
SO_SNDBUF adjustment for Windows Vista and above.
|
|
*/
|
|
#define DETECT_OS_NONE 0
|
|
#define DETECT_OS_PREVISTA 1
|
|
#define DETECT_OS_VISTA_OR_LATER 2
|
|
|
|
void Curl_sndbufset(curl_socket_t sockfd)
|
|
{
|
|
int val = CURL_MAX_WRITE_SIZE + 32;
|
|
int curval = 0;
|
|
int curlen = sizeof(curval);
|
|
|
|
static int detectOsState = DETECT_OS_NONE;
|
|
|
|
if(detectOsState == DETECT_OS_NONE) {
|
|
if(Curl_verify_windows_version(6, 0, PLATFORM_WINNT,
|
|
VERSION_GREATER_THAN_EQUAL))
|
|
detectOsState = DETECT_OS_VISTA_OR_LATER;
|
|
else
|
|
detectOsState = DETECT_OS_PREVISTA;
|
|
}
|
|
|
|
if(detectOsState == DETECT_OS_VISTA_OR_LATER)
|
|
return;
|
|
|
|
if(getsockopt(sockfd, SOL_SOCKET, SO_SNDBUF, (char *)&curval, &curlen) == 0)
|
|
if(curval > val)
|
|
return;
|
|
|
|
setsockopt(sockfd, SOL_SOCKET, SO_SNDBUF, (const char *)&val, sizeof(val));
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* singleipconnect()
|
|
*
|
|
* Note that even on connect fail it returns CURLE_OK, but with 'sock' set to
|
|
* CURL_SOCKET_BAD. Other errors will however return proper errors.
|
|
*
|
|
* singleipconnect() connects to the given IP only, and it may return without
|
|
* having connected.
|
|
*/
|
|
static CURLcode singleipconnect(struct connectdata *conn,
|
|
const Curl_addrinfo *ai,
|
|
curl_socket_t *sockp)
|
|
{
|
|
struct Curl_sockaddr_ex addr;
|
|
int rc = -1;
|
|
int error = 0;
|
|
bool isconnected = FALSE;
|
|
struct Curl_easy *data = conn->data;
|
|
curl_socket_t sockfd;
|
|
CURLcode result;
|
|
char ipaddress[MAX_IPADR_LEN];
|
|
long port;
|
|
bool is_tcp;
|
|
#ifdef TCP_FASTOPEN_CONNECT
|
|
int optval = 1;
|
|
#endif
|
|
char buffer[STRERROR_LEN];
|
|
|
|
*sockp = CURL_SOCKET_BAD;
|
|
|
|
result = Curl_socket(conn, ai, &addr, &sockfd);
|
|
if(result)
|
|
/* Failed to create the socket, but still return OK since we signal the
|
|
lack of socket as well. This allows the parent function to keep looping
|
|
over alternative addresses/socket families etc. */
|
|
return CURLE_OK;
|
|
|
|
/* store remote address and port used in this connection attempt */
|
|
if(!getaddressinfo((struct sockaddr*)&addr.sa_addr,
|
|
ipaddress, &port)) {
|
|
/* malformed address or bug in inet_ntop, try next address */
|
|
failf(data, "sa_addr inet_ntop() failed with errno %d: %s",
|
|
errno, Curl_strerror(errno, buffer, sizeof(buffer)));
|
|
Curl_closesocket(conn, sockfd);
|
|
return CURLE_OK;
|
|
}
|
|
infof(data, " Trying %s...\n", ipaddress);
|
|
|
|
#ifdef ENABLE_IPV6
|
|
is_tcp = (addr.family == AF_INET || addr.family == AF_INET6) &&
|
|
addr.socktype == SOCK_STREAM;
|
|
#else
|
|
is_tcp = (addr.family == AF_INET) && addr.socktype == SOCK_STREAM;
|
|
#endif
|
|
if(is_tcp && data->set.tcp_nodelay)
|
|
tcpnodelay(conn, sockfd);
|
|
|
|
nosigpipe(conn, sockfd);
|
|
|
|
Curl_sndbufset(sockfd);
|
|
|
|
if(is_tcp && data->set.tcp_keepalive)
|
|
tcpkeepalive(data, sockfd);
|
|
|
|
if(data->set.fsockopt) {
|
|
/* activate callback for setting socket options */
|
|
Curl_set_in_callback(data, true);
|
|
error = data->set.fsockopt(data->set.sockopt_client,
|
|
sockfd,
|
|
CURLSOCKTYPE_IPCXN);
|
|
Curl_set_in_callback(data, false);
|
|
|
|
if(error == CURL_SOCKOPT_ALREADY_CONNECTED)
|
|
isconnected = TRUE;
|
|
else if(error) {
|
|
Curl_closesocket(conn, sockfd); /* close the socket and bail out */
|
|
return CURLE_ABORTED_BY_CALLBACK;
|
|
}
|
|
}
|
|
|
|
/* possibly bind the local end to an IP, interface or port */
|
|
if(addr.family == AF_INET
|
|
#ifdef ENABLE_IPV6
|
|
|| addr.family == AF_INET6
|
|
#endif
|
|
) {
|
|
result = bindlocal(conn, sockfd, addr.family,
|
|
Curl_ipv6_scope((struct sockaddr*)&addr.sa_addr));
|
|
if(result) {
|
|
Curl_closesocket(conn, sockfd); /* close socket and bail out */
|
|
if(result == CURLE_UNSUPPORTED_PROTOCOL) {
|
|
/* The address family is not supported on this interface.
|
|
We can continue trying addresses */
|
|
return CURLE_COULDNT_CONNECT;
|
|
}
|
|
return result;
|
|
}
|
|
}
|
|
|
|
/* set socket non-blocking */
|
|
(void)curlx_nonblock(sockfd, TRUE);
|
|
|
|
conn->connecttime = Curl_now();
|
|
if(conn->num_addr > 1)
|
|
Curl_expire(data, conn->timeoutms_per_addr, EXPIRE_DNS_PER_NAME);
|
|
|
|
/* Connect TCP sockets, bind UDP */
|
|
if(!isconnected && (conn->socktype == SOCK_STREAM)) {
|
|
if(conn->bits.tcp_fastopen) {
|
|
#if defined(CONNECT_DATA_IDEMPOTENT) /* Darwin */
|
|
# if defined(HAVE_BUILTIN_AVAILABLE)
|
|
/* while connectx function is available since macOS 10.11 / iOS 9,
|
|
it did not have the interface declared correctly until
|
|
Xcode 9 / macOS SDK 10.13 */
|
|
if(__builtin_available(macOS 10.11, iOS 9.0, tvOS 9.0, watchOS 2.0, *)) {
|
|
sa_endpoints_t endpoints;
|
|
endpoints.sae_srcif = 0;
|
|
endpoints.sae_srcaddr = NULL;
|
|
endpoints.sae_srcaddrlen = 0;
|
|
endpoints.sae_dstaddr = &addr.sa_addr;
|
|
endpoints.sae_dstaddrlen = addr.addrlen;
|
|
|
|
rc = connectx(sockfd, &endpoints, SAE_ASSOCID_ANY,
|
|
CONNECT_RESUME_ON_READ_WRITE | CONNECT_DATA_IDEMPOTENT,
|
|
NULL, 0, NULL, NULL);
|
|
}
|
|
else {
|
|
rc = connect(sockfd, &addr.sa_addr, addr.addrlen);
|
|
}
|
|
# else
|
|
rc = connect(sockfd, &addr.sa_addr, addr.addrlen);
|
|
# endif /* HAVE_BUILTIN_AVAILABLE */
|
|
#elif defined(TCP_FASTOPEN_CONNECT) /* Linux >= 4.11 */
|
|
if(setsockopt(sockfd, IPPROTO_TCP, TCP_FASTOPEN_CONNECT,
|
|
(void *)&optval, sizeof(optval)) < 0)
|
|
infof(data, "Failed to enable TCP Fast Open on fd %d\n", sockfd);
|
|
else
|
|
infof(data, "TCP_FASTOPEN_CONNECT set\n");
|
|
|
|
rc = connect(sockfd, &addr.sa_addr, addr.addrlen);
|
|
#elif defined(MSG_FASTOPEN) /* old Linux */
|
|
if(conn->given->flags & PROTOPT_SSL)
|
|
rc = connect(sockfd, &addr.sa_addr, addr.addrlen);
|
|
else
|
|
rc = 0; /* Do nothing */
|
|
#endif
|
|
}
|
|
else {
|
|
rc = connect(sockfd, &addr.sa_addr, addr.addrlen);
|
|
}
|
|
|
|
if(-1 == rc)
|
|
error = SOCKERRNO;
|
|
}
|
|
else {
|
|
*sockp = sockfd;
|
|
return CURLE_OK;
|
|
}
|
|
|
|
if(-1 == rc) {
|
|
switch(error) {
|
|
case EINPROGRESS:
|
|
case EWOULDBLOCK:
|
|
#if defined(EAGAIN)
|
|
#if (EAGAIN) != (EWOULDBLOCK)
|
|
/* On some platforms EAGAIN and EWOULDBLOCK are the
|
|
* same value, and on others they are different, hence
|
|
* the odd #if
|
|
*/
|
|
case EAGAIN:
|
|
#endif
|
|
#endif
|
|
result = CURLE_OK;
|
|
break;
|
|
|
|
default:
|
|
/* unknown error, fallthrough and try another address! */
|
|
infof(data, "Immediate connect fail for %s: %s\n",
|
|
ipaddress, Curl_strerror(error, buffer, sizeof(buffer)));
|
|
data->state.os_errno = error;
|
|
|
|
/* connect failed */
|
|
Curl_closesocket(conn, sockfd);
|
|
result = CURLE_COULDNT_CONNECT;
|
|
}
|
|
}
|
|
|
|
if(!result)
|
|
*sockp = sockfd;
|
|
|
|
return result;
|
|
}
|
|
|
|
/*
|
|
* TCP connect to the given host with timeout, proxy or remote doesn't matter.
|
|
* There might be more than one IP address to try out. Fill in the passed
|
|
* pointer with the connected socket.
|
|
*/
|
|
|
|
CURLcode Curl_connecthost(struct connectdata *conn, /* context */
|
|
const struct Curl_dns_entry *remotehost)
|
|
{
|
|
struct Curl_easy *data = conn->data;
|
|
struct curltime before = Curl_now();
|
|
CURLcode result = CURLE_COULDNT_CONNECT;
|
|
|
|
timediff_t timeout_ms = Curl_timeleft(data, &before, TRUE);
|
|
|
|
if(timeout_ms < 0) {
|
|
/* a precaution, no need to continue if time already is up */
|
|
failf(data, "Connection time-out");
|
|
return CURLE_OPERATION_TIMEDOUT;
|
|
}
|
|
|
|
conn->num_addr = Curl_num_addresses(remotehost->addr);
|
|
conn->tempaddr[0] = remotehost->addr;
|
|
conn->tempaddr[1] = NULL;
|
|
conn->tempsock[0] = CURL_SOCKET_BAD;
|
|
conn->tempsock[1] = CURL_SOCKET_BAD;
|
|
|
|
/* Max time for the next connection attempt */
|
|
conn->timeoutms_per_addr =
|
|
conn->tempaddr[0]->ai_next == NULL ? timeout_ms : timeout_ms / 2;
|
|
|
|
/* start connecting to first IP */
|
|
while(conn->tempaddr[0]) {
|
|
result = singleipconnect(conn, conn->tempaddr[0], &(conn->tempsock[0]));
|
|
if(!result)
|
|
break;
|
|
conn->tempaddr[0] = conn->tempaddr[0]->ai_next;
|
|
}
|
|
|
|
if(conn->tempsock[0] == CURL_SOCKET_BAD) {
|
|
if(!result)
|
|
result = CURLE_COULDNT_CONNECT;
|
|
return result;
|
|
}
|
|
|
|
data->info.numconnects++; /* to track the number of connections made */
|
|
Curl_expire(conn->data, data->set.happy_eyeballs_timeout,
|
|
EXPIRE_HAPPY_EYEBALLS);
|
|
|
|
return CURLE_OK;
|
|
}
|
|
|
|
struct connfind {
|
|
struct connectdata *tofind;
|
|
bool found;
|
|
};
|
|
|
|
static int conn_is_conn(struct connectdata *conn, void *param)
|
|
{
|
|
struct connfind *f = (struct connfind *)param;
|
|
if(conn == f->tofind) {
|
|
f->found = TRUE;
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Used to extract socket and connectdata struct for the most recent
|
|
* transfer on the given Curl_easy.
|
|
*
|
|
* The returned socket will be CURL_SOCKET_BAD in case of failure!
|
|
*/
|
|
curl_socket_t Curl_getconnectinfo(struct Curl_easy *data,
|
|
struct connectdata **connp)
|
|
{
|
|
DEBUGASSERT(data);
|
|
|
|
/* this works for an easy handle:
|
|
* - that has been used for curl_easy_perform()
|
|
* - that is associated with a multi handle, and whose connection
|
|
* was detached with CURLOPT_CONNECT_ONLY
|
|
*/
|
|
if(data->state.lastconnect && (data->multi_easy || data->multi)) {
|
|
struct connectdata *c = data->state.lastconnect;
|
|
struct connfind find;
|
|
find.tofind = data->state.lastconnect;
|
|
find.found = FALSE;
|
|
|
|
Curl_conncache_foreach(data, data->multi_easy?
|
|
&data->multi_easy->conn_cache:
|
|
&data->multi->conn_cache, &find, conn_is_conn);
|
|
|
|
if(!find.found) {
|
|
data->state.lastconnect = NULL;
|
|
return CURL_SOCKET_BAD;
|
|
}
|
|
|
|
if(connp) {
|
|
/* only store this if the caller cares for it */
|
|
*connp = c;
|
|
c->data = data;
|
|
}
|
|
return c->sock[FIRSTSOCKET];
|
|
}
|
|
else
|
|
return CURL_SOCKET_BAD;
|
|
}
|
|
|
|
/*
|
|
* Check if a connection seems to be alive.
|
|
*/
|
|
bool Curl_connalive(struct connectdata *conn)
|
|
{
|
|
/* First determine if ssl */
|
|
if(conn->ssl[FIRSTSOCKET].use) {
|
|
/* use the SSL context */
|
|
if(!Curl_ssl_check_cxn(conn))
|
|
return false; /* FIN received */
|
|
}
|
|
/* Minix 3.1 doesn't support any flags on recv; just assume socket is OK */
|
|
#ifdef MSG_PEEK
|
|
else if(conn->sock[FIRSTSOCKET] == CURL_SOCKET_BAD)
|
|
return false;
|
|
else {
|
|
/* use the socket */
|
|
char buf;
|
|
if(recv((RECV_TYPE_ARG1)conn->sock[FIRSTSOCKET], (RECV_TYPE_ARG2)&buf,
|
|
(RECV_TYPE_ARG3)1, (RECV_TYPE_ARG4)MSG_PEEK) == 0) {
|
|
return false; /* FIN received */
|
|
}
|
|
}
|
|
#endif
|
|
return true;
|
|
}
|
|
|
|
/*
|
|
* Close a socket.
|
|
*
|
|
* 'conn' can be NULL, beware!
|
|
*/
|
|
int Curl_closesocket(struct connectdata *conn,
|
|
curl_socket_t sock)
|
|
{
|
|
if(conn && conn->fclosesocket) {
|
|
if((sock == conn->sock[SECONDARYSOCKET]) &&
|
|
conn->sock_accepted[SECONDARYSOCKET])
|
|
/* if this socket matches the second socket, and that was created with
|
|
accept, then we MUST NOT call the callback but clear the accepted
|
|
status */
|
|
conn->sock_accepted[SECONDARYSOCKET] = FALSE;
|
|
else {
|
|
int rc;
|
|
Curl_multi_closed(conn->data, sock);
|
|
Curl_set_in_callback(conn->data, true);
|
|
rc = conn->fclosesocket(conn->closesocket_client, sock);
|
|
Curl_set_in_callback(conn->data, false);
|
|
return rc;
|
|
}
|
|
}
|
|
|
|
if(conn)
|
|
/* tell the multi-socket code about this */
|
|
Curl_multi_closed(conn->data, sock);
|
|
|
|
sclose(sock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Create a socket based on info from 'conn' and 'ai'.
|
|
*
|
|
* 'addr' should be a pointer to the correct struct to get data back, or NULL.
|
|
* 'sockfd' must be a pointer to a socket descriptor.
|
|
*
|
|
* If the open socket callback is set, used that!
|
|
*
|
|
*/
|
|
CURLcode Curl_socket(struct connectdata *conn,
|
|
const Curl_addrinfo *ai,
|
|
struct Curl_sockaddr_ex *addr,
|
|
curl_socket_t *sockfd)
|
|
{
|
|
struct Curl_easy *data = conn->data;
|
|
struct Curl_sockaddr_ex dummy;
|
|
|
|
if(!addr)
|
|
/* if the caller doesn't want info back, use a local temp copy */
|
|
addr = &dummy;
|
|
|
|
/*
|
|
* The Curl_sockaddr_ex structure is basically libcurl's external API
|
|
* curl_sockaddr structure with enough space available to directly hold
|
|
* any protocol-specific address structures. The variable declared here
|
|
* will be used to pass / receive data to/from the fopensocket callback
|
|
* if this has been set, before that, it is initialized from parameters.
|
|
*/
|
|
|
|
addr->family = ai->ai_family;
|
|
addr->socktype = conn->socktype;
|
|
addr->protocol = conn->socktype == SOCK_DGRAM?IPPROTO_UDP:ai->ai_protocol;
|
|
addr->addrlen = ai->ai_addrlen;
|
|
|
|
if(addr->addrlen > sizeof(struct Curl_sockaddr_storage))
|
|
addr->addrlen = sizeof(struct Curl_sockaddr_storage);
|
|
memcpy(&addr->sa_addr, ai->ai_addr, addr->addrlen);
|
|
|
|
if(data->set.fopensocket) {
|
|
/*
|
|
* If the opensocket callback is set, all the destination address
|
|
* information is passed to the callback. Depending on this information the
|
|
* callback may opt to abort the connection, this is indicated returning
|
|
* CURL_SOCKET_BAD; otherwise it will return a not-connected socket. When
|
|
* the callback returns a valid socket the destination address information
|
|
* might have been changed and this 'new' address will actually be used
|
|
* here to connect.
|
|
*/
|
|
Curl_set_in_callback(data, true);
|
|
*sockfd = data->set.fopensocket(data->set.opensocket_client,
|
|
CURLSOCKTYPE_IPCXN,
|
|
(struct curl_sockaddr *)addr);
|
|
Curl_set_in_callback(data, false);
|
|
}
|
|
else
|
|
/* opensocket callback not set, so simply create the socket now */
|
|
*sockfd = socket(addr->family, addr->socktype, addr->protocol);
|
|
|
|
if(*sockfd == CURL_SOCKET_BAD)
|
|
/* no socket, no connection */
|
|
return CURLE_COULDNT_CONNECT;
|
|
|
|
#if defined(ENABLE_IPV6) && defined(HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID)
|
|
if(conn->scope_id && (addr->family == AF_INET6)) {
|
|
struct sockaddr_in6 * const sa6 = (void *)&addr->sa_addr;
|
|
sa6->sin6_scope_id = conn->scope_id;
|
|
}
|
|
#endif
|
|
|
|
return CURLE_OK;
|
|
|
|
}
|
|
|
|
/*
|
|
* Curl_conncontrol() marks streams or connection for closure.
|
|
*/
|
|
void Curl_conncontrol(struct connectdata *conn,
|
|
int ctrl /* see defines in header */
|
|
#if defined(DEBUGBUILD) && !defined(CURL_DISABLE_VERBOSE_STRINGS)
|
|
, const char *reason
|
|
#endif
|
|
)
|
|
{
|
|
/* close if a connection, or a stream that isn't multiplexed */
|
|
bool closeit = (ctrl == CONNCTRL_CONNECTION) ||
|
|
((ctrl == CONNCTRL_STREAM) && !(conn->handler->flags & PROTOPT_STREAM));
|
|
if((ctrl == CONNCTRL_STREAM) &&
|
|
(conn->handler->flags & PROTOPT_STREAM))
|
|
DEBUGF(infof(conn->data, "Kill stream: %s\n", reason));
|
|
else if((bit)closeit != conn->bits.close) {
|
|
DEBUGF(infof(conn->data, "Marked for [%s]: %s\n",
|
|
closeit?"closure":"keep alive", reason));
|
|
conn->bits.close = closeit; /* the only place in the source code that
|
|
should assign this bit */
|
|
}
|
|
}
|
|
|
|
/* Data received can be cached at various levels, so check them all here. */
|
|
bool Curl_conn_data_pending(struct connectdata *conn, int sockindex)
|
|
{
|
|
int readable;
|
|
|
|
if(Curl_ssl_data_pending(conn, sockindex) ||
|
|
Curl_recv_has_postponed_data(conn, sockindex))
|
|
return true;
|
|
|
|
readable = SOCKET_READABLE(conn->sock[sockindex], 0);
|
|
return (readable > 0 && (readable & CURL_CSELECT_IN));
|
|
}
|