1053 lines
29 KiB
C
1053 lines
29 KiB
C
/***************************************************************************
|
|
* _ _ ____ _
|
|
* Project ___| | | | _ \| |
|
|
* / __| | | | |_) | |
|
|
* | (__| |_| | _ <| |___
|
|
* \___|\___/|_| \_\_____|
|
|
*
|
|
* Copyright (C) 1998 - 2008, Daniel Stenberg, <daniel@haxx.se>, et al.
|
|
*
|
|
* This software is licensed as described in the file COPYING, which
|
|
* you should have received as part of this distribution. The terms
|
|
* are also available at http://curl.haxx.se/docs/copyright.html.
|
|
*
|
|
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
|
|
* copies of the Software, and permit persons to whom the Software is
|
|
* furnished to do so, under the terms of the COPYING file.
|
|
*
|
|
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
|
|
* KIND, either express or implied.
|
|
*
|
|
* $Id: connect.c,v 1.207 2008-11-06 17:19:57 yangtse Exp $
|
|
***************************************************************************/
|
|
|
|
#include "setup.h"
|
|
|
|
#ifndef WIN32
|
|
/* headers for non-win32 */
|
|
#ifdef HAVE_SYS_TIME_H
|
|
#include <sys/time.h>
|
|
#endif
|
|
#ifdef HAVE_SYS_SOCKET_H
|
|
#include <sys/socket.h>
|
|
#endif
|
|
#ifdef HAVE_NETINET_IN_H
|
|
#include <netinet/in.h> /* <netinet/tcp.h> may need it */
|
|
#endif
|
|
#ifdef HAVE_SYS_UN_H
|
|
#include <sys/un.h> /* for sockaddr_un */
|
|
#endif
|
|
#ifdef HAVE_NETINET_TCP_H
|
|
#include <netinet/tcp.h> /* for TCP_NODELAY */
|
|
#endif
|
|
#ifdef HAVE_SYS_IOCTL_H
|
|
#include <sys/ioctl.h>
|
|
#endif
|
|
#ifdef HAVE_UNISTD_H
|
|
#include <unistd.h>
|
|
#endif
|
|
#ifdef HAVE_NETDB_H
|
|
#include <netdb.h>
|
|
#endif
|
|
#ifdef HAVE_FCNTL_H
|
|
#include <fcntl.h>
|
|
#endif
|
|
#ifdef HAVE_ARPA_INET_H
|
|
#include <arpa/inet.h>
|
|
#endif
|
|
#ifdef HAVE_STDLIB_H
|
|
#include <stdlib.h> /* required for free() prototype, without it, this crashes */
|
|
#endif /* on macos 68K */
|
|
|
|
#if (defined(HAVE_FIONBIO) && defined(NETWARE))
|
|
#include <sys/filio.h>
|
|
#endif
|
|
#ifdef NETWARE
|
|
#undef in_addr_t
|
|
#define in_addr_t unsigned long
|
|
#endif
|
|
#ifdef VMS
|
|
#include <in.h>
|
|
#include <inet.h>
|
|
#endif
|
|
|
|
#endif /* !WIN32 */
|
|
|
|
#include <stdio.h>
|
|
#include <errno.h>
|
|
#include <string.h>
|
|
|
|
#define _MPRINTF_REPLACE /* use our functions only */
|
|
#include <curl/mprintf.h>
|
|
|
|
#include "urldata.h"
|
|
#include "sendf.h"
|
|
#include "if2ip.h"
|
|
#include "strerror.h"
|
|
#include "connect.h"
|
|
#include "memory.h"
|
|
#include "select.h"
|
|
#include "url.h" /* for Curl_safefree() */
|
|
#include "multiif.h"
|
|
#include "sockaddr.h" /* required for Curl_sockaddr_storage */
|
|
#include "inet_ntop.h"
|
|
#include "sslgen.h" /* for Curl_ssl_check_cxn() */
|
|
|
|
/* The last #include file should be: */
|
|
#include "memdebug.h"
|
|
|
|
#ifdef __SYMBIAN32__
|
|
/* This isn't actually supported under Symbian OS */
|
|
#undef SO_NOSIGPIPE
|
|
#endif
|
|
|
|
struct Curl_sockaddr_ex {
|
|
int family;
|
|
int socktype;
|
|
int protocol;
|
|
unsigned int addrlen;
|
|
union {
|
|
struct sockaddr addr;
|
|
struct Curl_sockaddr_storage buff;
|
|
} _sa_ex_u;
|
|
};
|
|
#define sa_addr _sa_ex_u.addr
|
|
|
|
static bool verifyconnect(curl_socket_t sockfd, int *error);
|
|
|
|
static curl_socket_t
|
|
singleipconnect(struct connectdata *conn,
|
|
const Curl_addrinfo *ai, /* start connecting to this */
|
|
long timeout_ms,
|
|
bool *connected);
|
|
|
|
/*
|
|
* Curl_timeleft() returns the amount of milliseconds left allowed for the
|
|
* transfer/connection. If the value is negative, the timeout time has already
|
|
* elapsed.
|
|
*
|
|
* If 'nowp' is non-NULL, it points to the current time.
|
|
* 'duringconnect' is FALSE if not during a connect, as then of course the
|
|
* connect timeout is not taken into account!
|
|
*/
|
|
long Curl_timeleft(struct connectdata *conn,
|
|
struct timeval *nowp,
|
|
bool duringconnect)
|
|
{
|
|
struct SessionHandle *data = conn->data;
|
|
int timeout_set = 0;
|
|
long timeout_ms = duringconnect?DEFAULT_CONNECT_TIMEOUT:0;
|
|
struct timeval now;
|
|
|
|
/* if a timeout is set, use the most restrictive one */
|
|
|
|
if(data->set.timeout > 0)
|
|
timeout_set |= 1;
|
|
if(duringconnect && (data->set.connecttimeout > 0))
|
|
timeout_set |= 2;
|
|
|
|
switch (timeout_set) {
|
|
case 1:
|
|
timeout_ms = data->set.timeout;
|
|
break;
|
|
case 2:
|
|
timeout_ms = data->set.connecttimeout;
|
|
break;
|
|
case 3:
|
|
if(data->set.timeout < data->set.connecttimeout)
|
|
timeout_ms = data->set.timeout;
|
|
else
|
|
timeout_ms = data->set.connecttimeout;
|
|
break;
|
|
default:
|
|
/* use the default */
|
|
if(!duringconnect)
|
|
/* if we're not during connect, there's no default timeout so if we're
|
|
at zero we better just return zero and not make it a negative number
|
|
by the math below */
|
|
return 0;
|
|
break;
|
|
}
|
|
|
|
if(!nowp) {
|
|
now = Curl_tvnow();
|
|
nowp = &now;
|
|
}
|
|
|
|
/* substract elapsed time */
|
|
timeout_ms -= Curl_tvdiff(*nowp, data->progress.t_startsingle);
|
|
|
|
return timeout_ms;
|
|
}
|
|
|
|
|
|
/*
|
|
* Curl_nonblock() set the given socket to either blocking or non-blocking
|
|
* mode based on the 'nonblock' boolean argument. This function is highly
|
|
* portable.
|
|
*/
|
|
int Curl_nonblock(curl_socket_t sockfd, /* operate on this */
|
|
int nonblock /* TRUE or FALSE */)
|
|
{
|
|
#undef SETBLOCK
|
|
#define SETBLOCK 0
|
|
#ifdef HAVE_O_NONBLOCK
|
|
/* most recent unix versions */
|
|
int flags;
|
|
|
|
flags = fcntl(sockfd, F_GETFL, 0);
|
|
if(FALSE != nonblock)
|
|
return fcntl(sockfd, F_SETFL, flags | O_NONBLOCK);
|
|
else
|
|
return fcntl(sockfd, F_SETFL, flags & (~O_NONBLOCK));
|
|
#undef SETBLOCK
|
|
#define SETBLOCK 1
|
|
#endif
|
|
|
|
#if defined(HAVE_FIONBIO) && (SETBLOCK == 0)
|
|
/* older unix versions */
|
|
int flags;
|
|
|
|
flags = nonblock;
|
|
return ioctl(sockfd, FIONBIO, &flags);
|
|
#undef SETBLOCK
|
|
#define SETBLOCK 2
|
|
#endif
|
|
|
|
#if defined(HAVE_IOCTLSOCKET) && (SETBLOCK == 0)
|
|
/* Windows? */
|
|
unsigned long flags;
|
|
flags = nonblock;
|
|
|
|
return ioctlsocket(sockfd, FIONBIO, &flags);
|
|
#undef SETBLOCK
|
|
#define SETBLOCK 3
|
|
#endif
|
|
|
|
#if defined(HAVE_IOCTLSOCKET_CASE) && (SETBLOCK == 0)
|
|
/* presumably for Amiga */
|
|
return IoctlSocket(sockfd, FIONBIO, (long)nonblock);
|
|
#undef SETBLOCK
|
|
#define SETBLOCK 4
|
|
#endif
|
|
|
|
#if defined(HAVE_SO_NONBLOCK) && (SETBLOCK == 0)
|
|
/* BeOS */
|
|
long b = nonblock ? 1 : 0;
|
|
return setsockopt(sockfd, SOL_SOCKET, SO_NONBLOCK, &b, sizeof(b));
|
|
#undef SETBLOCK
|
|
#define SETBLOCK 5
|
|
#endif
|
|
|
|
#ifdef HAVE_DISABLED_NONBLOCKING
|
|
return 0; /* returns success */
|
|
#undef SETBLOCK
|
|
#define SETBLOCK 6
|
|
#endif
|
|
|
|
#if(SETBLOCK == 0)
|
|
#error "no non-blocking method was found/used/set"
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* waitconnect() waits for a TCP connect on the given socket for the specified
|
|
* number if milliseconds. It returns:
|
|
* 0 fine connect
|
|
* -1 select() error
|
|
* 1 select() timeout
|
|
* 2 select() returned with an error condition fd_set
|
|
*/
|
|
|
|
#define WAITCONN_CONNECTED 0
|
|
#define WAITCONN_SELECT_ERROR -1
|
|
#define WAITCONN_TIMEOUT 1
|
|
#define WAITCONN_FDSET_ERROR 2
|
|
|
|
static
|
|
int waitconnect(curl_socket_t sockfd, /* socket */
|
|
long timeout_msec)
|
|
{
|
|
int rc;
|
|
#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(sockfd, NULL);
|
|
#endif
|
|
|
|
/* now select() until we get connect or timeout */
|
|
rc = Curl_socket_ready(CURL_SOCKET_BAD, sockfd, (int)timeout_msec);
|
|
if(-1 == rc)
|
|
/* error, no connect here, try next */
|
|
return WAITCONN_SELECT_ERROR;
|
|
|
|
else if(0 == rc)
|
|
/* timeout, no connect today */
|
|
return WAITCONN_TIMEOUT;
|
|
|
|
if(rc & CURL_CSELECT_ERR)
|
|
/* error condition caught */
|
|
return WAITCONN_FDSET_ERROR;
|
|
|
|
/* we have a connect! */
|
|
return WAITCONN_CONNECTED;
|
|
}
|
|
|
|
static CURLcode bindlocal(struct connectdata *conn,
|
|
curl_socket_t sockfd, int af)
|
|
{
|
|
struct SessionHandle *data = conn->data;
|
|
struct sockaddr_in me;
|
|
#ifdef ENABLE_IPV6
|
|
struct sockaddr_in6 me6;
|
|
#endif
|
|
struct sockaddr *sock = NULL; /* bind to this address */
|
|
socklen_t socksize = 0; /* size of the data sock points to */
|
|
struct Curl_dns_entry *h=NULL;
|
|
unsigned short port = data->set.localport; /* use this port number, 0 for
|
|
"random" */
|
|
/* how many port numbers to try to bind to, increasing one at a time */
|
|
int portnum = data->set.localportrange;
|
|
const char *dev = data->set.str[STRING_DEVICE];
|
|
int error;
|
|
|
|
/*************************************************************
|
|
* Select device to bind socket to
|
|
*************************************************************/
|
|
if(dev && (strlen(dev)<255) ) {
|
|
char myhost[256] = "";
|
|
int rc;
|
|
bool was_iface = FALSE;
|
|
|
|
if(Curl_if2ip(af, dev, myhost, sizeof(myhost))) {
|
|
/*
|
|
* We now have the numerical IP address in the 'myhost' buffer
|
|
*/
|
|
rc = Curl_resolv(conn, myhost, 0, &h);
|
|
if(rc == CURLRESOLV_PENDING)
|
|
(void)Curl_wait_for_resolv(conn, &h);
|
|
|
|
if(h) {
|
|
was_iface = TRUE;
|
|
}
|
|
}
|
|
|
|
if(!was_iface) {
|
|
/*
|
|
* This was not an interface, resolve the name as a host name
|
|
* or IP number
|
|
*/
|
|
|
|
/*
|
|
* Temporarily force name resolution to use only the address type
|
|
* of the connection. The resolve functions should really be changed
|
|
* to take a type parameter instead.
|
|
*/
|
|
long ipver = data->set.ip_version;
|
|
if (af == AF_INET)
|
|
data->set.ip_version = CURL_IPRESOLVE_V4;
|
|
#ifdef ENABLE_IPV6
|
|
else if (af == AF_INET6)
|
|
data->set.ip_version = CURL_IPRESOLVE_V6;
|
|
#endif
|
|
|
|
rc = Curl_resolv(conn, dev, 0, &h);
|
|
if(rc == CURLRESOLV_PENDING)
|
|
(void)Curl_wait_for_resolv(conn, &h);
|
|
data->set.ip_version = ipver;
|
|
|
|
if(h) {
|
|
/* convert the resolved address, sizeof myhost >= INET_ADDRSTRLEN */
|
|
Curl_printable_address(h->addr, myhost, sizeof myhost);
|
|
}
|
|
}
|
|
|
|
if(!*myhost || !h) {
|
|
/* need to fix this
|
|
h=Curl_gethost(data,
|
|
getmyhost(*myhost,sizeof(myhost)),
|
|
hostent_buf,
|
|
sizeof(hostent_buf));
|
|
*/
|
|
failf(data, "Couldn't bind to '%s'", dev);
|
|
if(h)
|
|
Curl_resolv_unlock(data, h);
|
|
return CURLE_INTERFACE_FAILED;
|
|
}
|
|
|
|
infof(data, "Bind local address to %s\n", myhost);
|
|
|
|
sock = h->addr->ai_addr;
|
|
socksize = h->addr->ai_addrlen;
|
|
|
|
#ifdef SO_BINDTODEVICE
|
|
/* I am not sure any other OSs than Linux that provide this feature, and
|
|
* at the least I cannot test. --Ben
|
|
*
|
|
* This feature allows one to tightly bind the local socket to a
|
|
* particular interface. This will force even requests to other local
|
|
* interfaces to go out the external interface.
|
|
*
|
|
*/
|
|
if(was_iface) {
|
|
/* Only bind to the interface when specified as interface, not just as a
|
|
* hostname or ip address.
|
|
*/
|
|
if(setsockopt(sockfd, SOL_SOCKET, SO_BINDTODEVICE,
|
|
dev, strlen(dev)+1) != 0) {
|
|
error = SOCKERRNO;
|
|
infof(data, "SO_BINDTODEVICE %s failed with errno %d: %s; will do regular bind\n",
|
|
dev, error, Curl_strerror(conn, error));
|
|
/* This is typically "errno 1, error: Operation not permitted" if
|
|
you're not running as root or another suitable privileged user */
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
else if(port) {
|
|
/* if a local port number is requested but no local IP, extract the
|
|
address from the socket */
|
|
if(af == AF_INET) {
|
|
memset(&me, 0, sizeof(me));
|
|
me.sin_family = AF_INET;
|
|
me.sin_addr.s_addr = INADDR_ANY;
|
|
|
|
sock = (struct sockaddr *)&me;
|
|
socksize = sizeof(me);
|
|
|
|
}
|
|
#ifdef ENABLE_IPV6
|
|
else { /* AF_INET6 */
|
|
memset(&me6, 0, sizeof(me6));
|
|
me6.sin6_family = AF_INET6;
|
|
/* in6addr_any isn't always available and since me6 has just been
|
|
cleared, it's not strictly necessary to use it here */
|
|
/*me6.sin6_addr = in6addr_any;*/
|
|
|
|
sock = (struct sockaddr *)&me6;
|
|
socksize = sizeof(me6);
|
|
}
|
|
#endif
|
|
}
|
|
else
|
|
/* no local kind of binding was requested */
|
|
return CURLE_OK;
|
|
|
|
do {
|
|
|
|
/* Set port number to bind to, 0 makes the system pick one */
|
|
if(sock->sa_family == AF_INET)
|
|
me.sin_port = htons(port);
|
|
#ifdef ENABLE_IPV6
|
|
else
|
|
me6.sin6_port = htons(port);
|
|
#endif
|
|
|
|
if( bind(sockfd, sock, socksize) >= 0) {
|
|
/* we succeeded to bind */
|
|
struct Curl_sockaddr_storage add;
|
|
socklen_t size = sizeof(add);
|
|
memset(&add, 0, sizeof(struct Curl_sockaddr_storage));
|
|
if(getsockname(sockfd, (struct sockaddr *) &add, &size) < 0) {
|
|
data->state.os_errno = error = SOCKERRNO;
|
|
failf(data, "getsockname() failed with errno %d: %s",
|
|
error, Curl_strerror(conn, error));
|
|
if(h)
|
|
Curl_resolv_unlock(data, h);
|
|
return CURLE_INTERFACE_FAILED;
|
|
}
|
|
/* We re-use/clobber the port variable here below */
|
|
if(((struct sockaddr *)&add)->sa_family == AF_INET)
|
|
port = ntohs(((struct sockaddr_in *)&add)->sin_port);
|
|
#ifdef ENABLE_IPV6
|
|
else
|
|
port = ntohs(((struct sockaddr_in6 *)&add)->sin6_port);
|
|
#endif
|
|
infof(data, "Local port: %d\n", port);
|
|
conn->bits.bound = TRUE;
|
|
if(h)
|
|
Curl_resolv_unlock(data, h);
|
|
return CURLE_OK;
|
|
}
|
|
if(--portnum > 0) {
|
|
infof(data, "Bind to local port %d failed, trying next\n", port);
|
|
port++; /* try next port */
|
|
}
|
|
else
|
|
break;
|
|
} while(1);
|
|
|
|
data->state.os_errno = error = SOCKERRNO;
|
|
failf(data, "bind failed with errno %d: %s",
|
|
error, Curl_strerror(conn, error));
|
|
if(h)
|
|
Curl_resolv_unlock(data, h);
|
|
|
|
return CURLE_INTERFACE_FAILED;
|
|
}
|
|
|
|
/*
|
|
* verifyconnect() returns TRUE if the connect really has happened.
|
|
*/
|
|
static bool verifyconnect(curl_socket_t sockfd, int *error)
|
|
{
|
|
bool rc = TRUE;
|
|
#ifdef SO_ERROR
|
|
int err = 0;
|
|
socklen_t errSize = sizeof(err);
|
|
|
|
#ifdef WIN32
|
|
/*
|
|
* 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
|
|
#ifdef __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 bool trynextip(struct connectdata *conn,
|
|
int sockindex,
|
|
bool *connected)
|
|
{
|
|
curl_socket_t sockfd;
|
|
Curl_addrinfo *ai;
|
|
|
|
/* first close the failed socket */
|
|
sclose(conn->sock[sockindex]);
|
|
conn->sock[sockindex] = CURL_SOCKET_BAD;
|
|
*connected = FALSE;
|
|
|
|
if(sockindex != FIRSTSOCKET)
|
|
return TRUE; /* no next */
|
|
|
|
/* try the next address */
|
|
ai = conn->ip_addr->ai_next;
|
|
|
|
while(ai) {
|
|
sockfd = singleipconnect(conn, ai, 0L, connected);
|
|
if(sockfd != CURL_SOCKET_BAD) {
|
|
/* store the new socket descriptor */
|
|
conn->sock[sockindex] = sockfd;
|
|
conn->ip_addr = ai;
|
|
break;
|
|
}
|
|
ai = ai->ai_next;
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
/*
|
|
* Curl_is_connected() is used from the multi interface to check if the
|
|
* firstsocket has connected.
|
|
*/
|
|
|
|
CURLcode Curl_is_connected(struct connectdata *conn,
|
|
int sockindex,
|
|
bool *connected)
|
|
{
|
|
int rc;
|
|
struct SessionHandle *data = conn->data;
|
|
CURLcode code = CURLE_OK;
|
|
curl_socket_t sockfd = conn->sock[sockindex];
|
|
long allow = DEFAULT_CONNECT_TIMEOUT;
|
|
|
|
DEBUGASSERT(sockindex >= FIRSTSOCKET && sockindex <= SECONDARYSOCKET);
|
|
|
|
*connected = FALSE; /* a very negative world view is best */
|
|
|
|
if(conn->bits.tcpconnect) {
|
|
/* we are connected already! */
|
|
long allow_total = 0;
|
|
|
|
/* subtract the most strict timeout of the ones */
|
|
if(data->set.timeout)
|
|
allow_total = data->set.timeout;
|
|
|
|
Curl_expire(data, allow_total);
|
|
*connected = TRUE;
|
|
return CURLE_OK;
|
|
}
|
|
|
|
/* figure out how long time we have left to connect */
|
|
allow = Curl_timeleft(conn, NULL, TRUE);
|
|
|
|
if(allow < 0) {
|
|
/* time-out, bail out, go home */
|
|
failf(data, "Connection time-out");
|
|
return CURLE_OPERATION_TIMEDOUT;
|
|
}
|
|
|
|
Curl_expire(data, allow);
|
|
|
|
/* check for connect without timeout as we want to return immediately */
|
|
rc = waitconnect(sockfd, 0);
|
|
|
|
if(WAITCONN_CONNECTED == rc) {
|
|
int error;
|
|
if(verifyconnect(sockfd, &error)) {
|
|
/* we are connected, awesome! */
|
|
*connected = TRUE;
|
|
return CURLE_OK;
|
|
}
|
|
/* nope, not connected for real */
|
|
data->state.os_errno = error;
|
|
infof(data, "Connection failed\n");
|
|
if(trynextip(conn, sockindex, connected)) {
|
|
failf(data, "Failed connect to %s:%d; %s",
|
|
conn->host.name, conn->port, Curl_strerror(conn, error));
|
|
code = CURLE_COULDNT_CONNECT;
|
|
}
|
|
}
|
|
else if(WAITCONN_TIMEOUT != rc) {
|
|
int error = 0;
|
|
|
|
/* nope, not connected */
|
|
if(WAITCONN_FDSET_ERROR == rc) {
|
|
(void)verifyconnect(sockfd, &error);
|
|
data->state.os_errno = error;
|
|
infof(data, "%s\n",Curl_strerror(conn,error));
|
|
}
|
|
else
|
|
infof(data, "Connection failed\n");
|
|
|
|
if(trynextip(conn, sockindex, connected)) {
|
|
error = SOCKERRNO;
|
|
data->state.os_errno = error;
|
|
failf(data, "Failed connect to %s:%d; %s",
|
|
conn->host.name, conn->port, Curl_strerror(conn, error));
|
|
code = CURLE_COULDNT_CONNECT;
|
|
}
|
|
}
|
|
/*
|
|
* If the connection failed here, we should attempt to connect to the "next
|
|
* address" for the given host.
|
|
*/
|
|
|
|
return code;
|
|
}
|
|
|
|
static void tcpnodelay(struct connectdata *conn,
|
|
curl_socket_t sockfd)
|
|
{
|
|
#ifdef TCP_NODELAY
|
|
struct SessionHandle *data= conn->data;
|
|
socklen_t onoff = (socklen_t) data->set.tcp_nodelay;
|
|
int proto = IPPROTO_TCP;
|
|
|
|
#if 0
|
|
/* The use of getprotobyname() is disabled since it isn't thread-safe on
|
|
numerous systems. On these getprotobyname_r() should be used instead, but
|
|
that exists in at least one 4 arg version and one 5 arg version, and
|
|
since the proto number rarely changes anyway we now just use the hard
|
|
coded number. The "proper" fix would need a configure check for the
|
|
correct function much in the same style the gethostbyname_r versions are
|
|
detected. */
|
|
struct protoent *pe = getprotobyname("tcp");
|
|
if(pe)
|
|
proto = pe->p_proto;
|
|
#endif
|
|
|
|
if(setsockopt(sockfd, proto, TCP_NODELAY, (void *)&onoff,
|
|
sizeof(onoff)) < 0)
|
|
infof(data, "Could not set TCP_NODELAY: %s\n",
|
|
Curl_strerror(conn, SOCKERRNO));
|
|
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 SessionHandle *data= conn->data;
|
|
int onoff = 1;
|
|
if(setsockopt(sockfd, SOL_SOCKET, SO_NOSIGPIPE, (void *)&onoff,
|
|
sizeof(onoff)) < 0)
|
|
infof(data, "Could not set SO_NOSIGPIPE: %s\n",
|
|
Curl_strerror(conn, SOCKERRNO));
|
|
}
|
|
#else
|
|
#define nosigpipe(x,y)
|
|
#endif
|
|
|
|
/* singleipconnect() connects to the given IP only, and it may return without
|
|
having connected if used from the multi interface. */
|
|
static curl_socket_t
|
|
singleipconnect(struct connectdata *conn,
|
|
const Curl_addrinfo *ai,
|
|
long timeout_ms,
|
|
bool *connected)
|
|
{
|
|
struct Curl_sockaddr_ex addr;
|
|
char addr_buf[128];
|
|
int rc;
|
|
int error;
|
|
bool isconnected;
|
|
struct SessionHandle *data = conn->data;
|
|
curl_socket_t sockfd;
|
|
CURLcode res;
|
|
const void *iptoprint;
|
|
struct sockaddr_in * const sa4 = (void *)&addr.sa_addr;
|
|
#ifdef ENABLE_IPV6
|
|
struct sockaddr_in6 * const sa6 = (void *)&addr.sa_addr;
|
|
#endif
|
|
|
|
/*
|
|
* 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 = 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);
|
|
|
|
*connected = FALSE; /* default is not connected */
|
|
|
|
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.
|
|
*/
|
|
sockfd = data->set.fopensocket(data->set.opensocket_client,
|
|
CURLSOCKTYPE_IPCXN,
|
|
(struct curl_sockaddr *)&addr);
|
|
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 CURL_SOCKET_BAD;
|
|
|
|
#ifdef ENABLE_IPV6
|
|
if (conn->scope && (addr.family == AF_INET6))
|
|
sa6->sin6_scope_id = conn->scope;
|
|
#endif
|
|
|
|
/* FIXME: do we have Curl_printable_address-like with struct sockaddr* as
|
|
argument? */
|
|
#if defined(HAVE_SYS_UN_H) && defined(AF_UNIX)
|
|
if(addr.family == AF_UNIX) {
|
|
infof(data, " Trying %s... ",
|
|
((const struct sockaddr_un*)(&addr.sa_addr))->sun_path);
|
|
snprintf(data->info.ip, MAX_IPADR_LEN, "%s",
|
|
((const struct sockaddr_un*)(&addr.sa_addr))->sun_path);
|
|
strcpy(conn->ip_addr_str, data->info.ip);
|
|
}
|
|
else
|
|
#endif
|
|
{
|
|
#ifdef ENABLE_IPV6
|
|
if(addr.family == AF_INET6) {
|
|
iptoprint = &sa6->sin6_addr;
|
|
conn->bits.ipv6 = TRUE;
|
|
}
|
|
else
|
|
#endif
|
|
{
|
|
iptoprint = &sa4->sin_addr;
|
|
}
|
|
|
|
if(Curl_inet_ntop(addr.family, iptoprint, addr_buf,
|
|
sizeof(addr_buf)) != NULL) {
|
|
infof(data, " Trying %s... ", addr_buf);
|
|
snprintf(data->info.ip, MAX_IPADR_LEN, "%s", addr_buf);
|
|
strcpy(conn->ip_addr_str, data->info.ip);
|
|
}
|
|
}
|
|
|
|
if(data->set.tcp_nodelay)
|
|
tcpnodelay(conn, sockfd);
|
|
|
|
nosigpipe(conn, sockfd);
|
|
|
|
if(data->set.fsockopt) {
|
|
/* activate callback for setting socket options */
|
|
error = data->set.fsockopt(data->set.sockopt_client,
|
|
sockfd,
|
|
CURLSOCKTYPE_IPCXN);
|
|
if(error) {
|
|
sclose(sockfd); /* close the socket and bail out */
|
|
return CURL_SOCKET_BAD;
|
|
}
|
|
}
|
|
|
|
/* possibly bind the local end to an IP, interface or port */
|
|
res = bindlocal(conn, sockfd, addr.family);
|
|
if(res) {
|
|
sclose(sockfd); /* close socket and bail out */
|
|
return CURL_SOCKET_BAD;
|
|
}
|
|
|
|
/* set socket non-blocking */
|
|
Curl_nonblock(sockfd, TRUE);
|
|
|
|
/* Connect TCP sockets, bind UDP */
|
|
if(conn->socktype == SOCK_STREAM)
|
|
rc = connect(sockfd, &addr.sa_addr, addr.addrlen);
|
|
else
|
|
rc = 0;
|
|
|
|
if(-1 == rc) {
|
|
error = SOCKERRNO;
|
|
|
|
switch (error) {
|
|
case EINPROGRESS:
|
|
case EWOULDBLOCK:
|
|
#if defined(EAGAIN) && 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
|
|
rc = waitconnect(sockfd, timeout_ms);
|
|
break;
|
|
default:
|
|
/* unknown error, fallthrough and try another address! */
|
|
failf(data, "Failed to connect to %s: %s",
|
|
addr_buf, Curl_strerror(conn,error));
|
|
data->state.os_errno = error;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* The 'WAITCONN_TIMEOUT == rc' comes from the waitconnect(), and not from
|
|
connect(). We can be sure of this since connect() cannot return 1. */
|
|
if((WAITCONN_TIMEOUT == rc) &&
|
|
(data->state.used_interface == Curl_if_multi)) {
|
|
/* Timeout when running the multi interface */
|
|
return sockfd;
|
|
}
|
|
|
|
isconnected = verifyconnect(sockfd, &error);
|
|
|
|
if(!rc && isconnected) {
|
|
/* we are connected, awesome! */
|
|
*connected = TRUE; /* this is a true connect */
|
|
infof(data, "connected\n");
|
|
return sockfd;
|
|
}
|
|
else if(WAITCONN_TIMEOUT == rc)
|
|
infof(data, "Timeout\n");
|
|
else {
|
|
data->state.os_errno = error;
|
|
infof(data, "%s\n", Curl_strerror(conn, error));
|
|
}
|
|
|
|
/* connect failed or timed out */
|
|
sclose(sockfd);
|
|
|
|
return CURL_SOCKET_BAD;
|
|
}
|
|
|
|
/*
|
|
* 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,
|
|
curl_socket_t *sockconn, /* the connected socket */
|
|
Curl_addrinfo **addr, /* the one we used */
|
|
bool *connected) /* really connected? */
|
|
{
|
|
struct SessionHandle *data = conn->data;
|
|
curl_socket_t sockfd = CURL_SOCKET_BAD;
|
|
int aliasindex;
|
|
int num_addr;
|
|
Curl_addrinfo *ai;
|
|
Curl_addrinfo *curr_addr;
|
|
|
|
struct timeval after;
|
|
struct timeval before = Curl_tvnow();
|
|
|
|
/*************************************************************
|
|
* Figure out what maximum time we have left
|
|
*************************************************************/
|
|
long timeout_ms;
|
|
long timeout_per_addr;
|
|
|
|
DEBUGASSERT(sockconn);
|
|
*connected = FALSE; /* default to not connected */
|
|
|
|
/* get the timeout left */
|
|
timeout_ms = Curl_timeleft(conn, &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;
|
|
}
|
|
Curl_expire(data, timeout_ms);
|
|
|
|
/* Max time for each address */
|
|
num_addr = Curl_num_addresses(remotehost->addr);
|
|
timeout_per_addr = timeout_ms / num_addr;
|
|
|
|
ai = remotehost->addr;
|
|
|
|
/* Below is the loop that attempts to connect to all IP-addresses we
|
|
* know for the given host. One by one until one IP succeeds.
|
|
*/
|
|
|
|
if(data->state.used_interface == Curl_if_multi)
|
|
/* don't hang when doing multi */
|
|
timeout_per_addr = 0;
|
|
|
|
/*
|
|
* Connecting with a Curl_addrinfo chain
|
|
*/
|
|
for (curr_addr = ai, aliasindex=0; curr_addr;
|
|
curr_addr = curr_addr->ai_next, aliasindex++) {
|
|
|
|
/* start connecting to the IP curr_addr points to */
|
|
sockfd = singleipconnect(conn, curr_addr, timeout_per_addr, connected);
|
|
|
|
if(sockfd != CURL_SOCKET_BAD)
|
|
break;
|
|
|
|
/* get a new timeout for next attempt */
|
|
after = Curl_tvnow();
|
|
timeout_ms -= Curl_tvdiff(after, before);
|
|
if(timeout_ms < 0) {
|
|
failf(data, "connect() timed out!");
|
|
return CURLE_OPERATION_TIMEDOUT;
|
|
}
|
|
before = after;
|
|
} /* end of connect-to-each-address loop */
|
|
|
|
*sockconn = sockfd; /* the socket descriptor we've connected */
|
|
|
|
if(sockfd == CURL_SOCKET_BAD) {
|
|
/* no good connect was made */
|
|
failf(data, "couldn't connect to host");
|
|
return CURLE_COULDNT_CONNECT;
|
|
}
|
|
|
|
/* leave the socket in non-blocking mode */
|
|
|
|
/* store the address we use */
|
|
if(addr)
|
|
*addr = curr_addr;
|
|
|
|
data->info.numconnects++; /* to track the number of connections made */
|
|
|
|
return CURLE_OK;
|
|
}
|
|
|
|
/*
|
|
* Used to extract socket and connectdata struct for the most recent
|
|
* transfer on the given SessionHandle.
|
|
*
|
|
* The socket 'long' will be -1 in case of failure!
|
|
*/
|
|
CURLcode Curl_getconnectinfo(struct SessionHandle *data,
|
|
long *param_longp,
|
|
struct connectdata **connp)
|
|
{
|
|
if((data->state.lastconnect != -1) &&
|
|
(data->state.connc->connects[data->state.lastconnect] != NULL)) {
|
|
struct connectdata *c =
|
|
data->state.connc->connects[data->state.lastconnect];
|
|
if(connp)
|
|
/* only store this if the caller cares for it */
|
|
*connp = c;
|
|
*param_longp = c->sock[FIRSTSOCKET];
|
|
/* we have a socket connected, let's determine if the server shut down */
|
|
/* determine if ssl */
|
|
if(c->ssl[FIRSTSOCKET].use) {
|
|
/* use the SSL context */
|
|
if(!Curl_ssl_check_cxn(c))
|
|
*param_longp = -1; /* FIN received */
|
|
}
|
|
/* Minix 3.1 doesn't support any flags on recv; just assume socket is OK */
|
|
#ifdef MSG_PEEK
|
|
else {
|
|
/* use the socket */
|
|
char buf;
|
|
if(recv((RECV_TYPE_ARG1)c->sock[FIRSTSOCKET], (RECV_TYPE_ARG2)&buf,
|
|
(RECV_TYPE_ARG3)1, (RECV_TYPE_ARG4)MSG_PEEK) == 0) {
|
|
*param_longp = -1; /* FIN received */
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
else
|
|
*param_longp = -1;
|
|
|
|
return CURLE_OK;
|
|
}
|