diff options
Diffstat (limited to 'libcurl/src/lib/connect.c')
| -rw-r--r-- | libcurl/src/lib/connect.c | 1377 |
1 files changed, 0 insertions, 1377 deletions
diff --git a/libcurl/src/lib/connect.c b/libcurl/src/lib/connect.c deleted file mode 100644 index eaaac4e..0000000 --- a/libcurl/src/lib/connect.c +++ /dev/null @@ -1,1377 +0,0 @@ -/***************************************************************************
- * _ _ ____ _
- * Project ___| | | | _ \| |
- * / __| | | | |_) | |
- * | (__| |_| | _ <| |___
- * \___|\___/|_| \_\_____|
- *
- * Copyright (C) 1998 - 2015, 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.
- *
- ***************************************************************************/
-
-#include "curl_setup.h"
-
-#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_NETDB_H
-#include <netdb.h>
-#endif
-#ifdef HAVE_FCNTL_H
-#include <fcntl.h>
-#endif
-#ifdef HAVE_ARPA_INET_H
-#include <arpa/inet.h>
-#endif
-
-#if (defined(HAVE_IOCTL_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
-
-#include "curl_printf.h"
-#include "urldata.h"
-#include "sendf.h"
-#include "if2ip.h"
-#include "strerror.h"
-#include "connect.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 "inet_pton.h"
-#include "vtls/vtls.h" /* for Curl_ssl_check_cxn() */
-#include "progress.h"
-#include "warnless.h"
-#include "conncache.h"
-#include "multihandle.h"
-
-/* The last #include files should be: */
-#include "curl_memory.h"
-#include "memdebug.h"
-
-#ifdef __SYMBIAN32__
-/* This isn't actually supported under Symbian OS */
-#undef SO_NOSIGPIPE
-#endif
-
-static bool verifyconnect(curl_socket_t sockfd, int *error);
-
-#if defined(__DragonFly__) || defined(HAVE_WINSOCK_H)
-/* DragonFlyBSD and Windows use millisecond units */
-#define KEEPALIVE_FACTOR(x) (x *= 1000)
-#else
-#define KEEPALIVE_FACTOR(x)
-#endif
-
-#if defined(HAVE_WINSOCK2_H) && !defined(SIO_KEEPALIVE_VALS)
-#define SIO_KEEPALIVE_VALS _WSAIOW(IOC_VENDOR,4)
-
-struct tcp_keepalive {
- u_long onoff;
- u_long keepalivetime;
- u_long keepaliveinterval;
-};
-#endif
-
-static void
-tcpkeepalive(struct SessionHandle *data,
- curl_socket_t sockfd)
-{
- int optval = data->set.tcp_keepalive?1:0;
-
- /* only set IDLE and INTVL if setting KEEPALIVE is successful */
- if(setsockopt(sockfd, SOL_SOCKET, SO_KEEPALIVE,
- (void *)&optval, sizeof(optval)) < 0) {
- infof(data, "Failed to set SO_KEEPALIVE on fd %d\n", sockfd);
- }
- else {
-#if defined(SIO_KEEPALIVE_VALS)
- struct tcp_keepalive vals;
- DWORD dummy;
- vals.onoff = 1;
- optval = curlx_sltosi(data->set.tcp_keepidle);
- KEEPALIVE_FACTOR(optval);
- vals.keepalivetime = optval;
- optval = curlx_sltosi(data->set.tcp_keepintvl);
- KEEPALIVE_FACTOR(optval);
- vals.keepaliveinterval = optval;
- if(WSAIoctl(sockfd, SIO_KEEPALIVE_VALS, (LPVOID) &vals, sizeof(vals),
- NULL, 0, &dummy, NULL, NULL) != 0) {
- infof(data, "Failed to set SIO_KEEPALIVE_VALS on fd %d: %d\n",
- (int)sockfd, WSAGetLastError());
- }
-#else
-#ifdef TCP_KEEPIDLE
- optval = curlx_sltosi(data->set.tcp_keepidle);
- KEEPALIVE_FACTOR(optval);
- if(setsockopt(sockfd, IPPROTO_TCP, TCP_KEEPIDLE,
- (void *)&optval, sizeof(optval)) < 0) {
- infof(data, "Failed to set TCP_KEEPIDLE on fd %d\n", sockfd);
- }
-#endif
-#ifdef TCP_KEEPINTVL
- optval = curlx_sltosi(data->set.tcp_keepintvl);
- KEEPALIVE_FACTOR(optval);
- if(setsockopt(sockfd, IPPROTO_TCP, TCP_KEEPINTVL,
- (void *)&optval, sizeof(optval)) < 0) {
- infof(data, "Failed to set TCP_KEEPINTVL on fd %d\n", sockfd);
- }
-#endif
-#ifdef TCP_KEEPALIVE
- /* Mac OS X style */
- optval = curlx_sltosi(data->set.tcp_keepidle);
- KEEPALIVE_FACTOR(optval);
- if(setsockopt(sockfd, IPPROTO_TCP, TCP_KEEPALIVE,
- (void *)&optval, sizeof(optval)) < 0) {
- infof(data, "Failed to set TCP_KEEPALIVE on fd %d\n", sockfd);
- }
-#endif
-#endif
- }
-}
-
-static CURLcode
-singleipconnect(struct connectdata *conn,
- const Curl_addrinfo *ai, /* start connecting to this */
- curl_socket_t *sock);
-
-/*
- * Curl_timeleft() returns the amount of milliseconds left allowed for the
- * transfer/connection. If the value is negative, the timeout time has already
- * elapsed.
- *
- * The start time is stored in progress.t_startsingle - as set with
- * Curl_pgrsTime(..., TIMER_STARTSINGLE);
- *
- * 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!
- *
- * @unittest: 1303
- */
-CURL_STATIC long Curl_timeleft(struct SessionHandle *data,
- struct timeval *nowp,
- bool duringconnect)
-{
- 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;
- }
-
- /* subtract elapsed time */
- if(duringconnect)
- /* since this most recent connect started */
- timeout_ms -= Curl_tvdiff(*nowp, data->progress.t_startsingle);
- else
- /* since the entire operation started */
- timeout_ms -= Curl_tvdiff(*nowp, data->progress.t_startop);
- if(!timeout_ms)
- /* avoid returning 0 as that means no timeout! */
- return -1;
-
- return timeout_ms;
-}
-
-static CURLcode bindlocal(struct connectdata *conn,
- curl_socket_t sockfd, int af, unsigned int scope)
-{
- struct SessionHandle *data = conn->data;
-
- struct Curl_sockaddr_storage sa;
- struct sockaddr *sock = (struct sockaddr *)&sa; /* bind to this address */
- curl_socklen_t sizeof_sa = 0; /* size of the data sock points to */
- struct sockaddr_in *si4 = (struct sockaddr_in *)&sa;
-#ifdef ENABLE_IPV6
- struct sockaddr_in6 *si6 = (struct sockaddr_in6 *)&sa;
-#endif
-
- 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 && !port)
- /* no local kind of binding was requested */
- return CURLE_OK;
-
- memset(&sa, 0, sizeof(struct Curl_sockaddr_storage));
-
- if(dev && (strlen(dev)<255) ) {
- char myhost[256] = "";
- int done = 0; /* -1 for error, 1 for address found */
- bool is_interface = FALSE;
- bool is_host = FALSE;
- static const char *if_prefix = "if!";
- static const char *host_prefix = "host!";
-
- if(strncmp(if_prefix, dev, strlen(if_prefix)) == 0) {
- dev += strlen(if_prefix);
- is_interface = TRUE;
- }
- else if(strncmp(host_prefix, dev, strlen(host_prefix)) == 0) {
- dev += strlen(host_prefix);
- is_host = TRUE;
- }
-
- /* interface */
- if(!is_host) {
- switch(Curl_if2ip(af, scope, conn->scope_id, dev,
- myhost, sizeof(myhost))) {
- case IF2IP_NOT_FOUND:
- if(is_interface) {
- /* Do not fall back to treating it as a host name */
- failf(data, "Couldn't bind to interface '%s'", dev);
- return CURLE_INTERFACE_FAILED;
- }
- break;
- case IF2IP_AF_NOT_SUPPORTED:
- /* Signal the caller to try another address family if available */
- return CURLE_UNSUPPORTED_PROTOCOL;
- case IF2IP_FOUND:
- is_interface = TRUE;
- /*
- * We now have the numerical IP address in the 'myhost' buffer
- */
- infof(data, "Local Interface %s is ip %s using address family %i\n",
- dev, myhost, af);
- done = 1;
-
-#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.
- *
- *
- * 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, (curl_socklen_t)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
- break;
- }
- }
- if(!is_interface) {
- /*
- * 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 = conn->ip_version;
- int rc;
-
- if(af == AF_INET)
- conn->ip_version = CURL_IPRESOLVE_V4;
-#ifdef ENABLE_IPV6
- else if(af == AF_INET6)
- conn->ip_version = CURL_IPRESOLVE_V6;
-#endif
-
- rc = Curl_resolv(conn, dev, 0, &h);
- if(rc == CURLRESOLV_PENDING)
- (void)Curl_resolver_wait_resolv(conn, &h);
- conn->ip_version = ipver;
-
- if(h) {
- /* convert the resolved address, sizeof myhost >= INET_ADDRSTRLEN */
- Curl_printable_address(h->addr, myhost, sizeof(myhost));
- infof(data, "Name '%s' family %i resolved to '%s' family %i\n",
- dev, af, myhost, h->addr->ai_family);
- Curl_resolv_unlock(data, h);
- done = 1;
- }
- else {
- /*
- * provided dev was no interface (or interfaces are not supported
- * e.g. solaris) no ip address and no domain we fail here
- */
- done = -1;
- }
- }
-
- if(done > 0) {
-#ifdef ENABLE_IPV6
- /* IPv6 address */
- if(af == AF_INET6) {
-#ifdef HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID
- char *scope_ptr = strchr(myhost, '%');
- if(scope_ptr)
- *(scope_ptr++) = 0;
-#endif
- if(Curl_inet_pton(AF_INET6, myhost, &si6->sin6_addr) > 0) {
- si6->sin6_family = AF_INET6;
- si6->sin6_port = htons(port);
-#ifdef HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID
- if(scope_ptr)
- /* The "myhost" string either comes from Curl_if2ip or from
- Curl_printable_address. The latter returns only numeric scope
- IDs and the former returns none at all. So the scope ID, if
- present, is known to be numeric */
- si6->sin6_scope_id = atoi(scope_ptr);
-#endif
- }
- sizeof_sa = sizeof(struct sockaddr_in6);
- }
- else
-#endif
- /* IPv4 address */
- if((af == AF_INET) &&
- (Curl_inet_pton(AF_INET, myhost, &si4->sin_addr) > 0)) {
- si4->sin_family = AF_INET;
- si4->sin_port = htons(port);
- sizeof_sa = sizeof(struct sockaddr_in);
- }
- }
-
- if(done < 1) {
- failf(data, "Couldn't bind to '%s'", dev);
- return CURLE_INTERFACE_FAILED;
- }
- }
- else {
- /* no device was given, prepare sa to match af's needs */
-#ifdef ENABLE_IPV6
- if(af == AF_INET6) {
- si6->sin6_family = AF_INET6;
- si6->sin6_port = htons(port);
- sizeof_sa = sizeof(struct sockaddr_in6);
- }
- else
-#endif
- if(af == AF_INET) {
- si4->sin_family = AF_INET;
- si4->sin_port = htons(port);
- sizeof_sa = sizeof(struct sockaddr_in);
- }
- }
-
- for(;;) {
- if(bind(sockfd, sock, sizeof_sa) >= 0) {
- /* we succeeded to bind */
- struct Curl_sockaddr_storage add;
- curl_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));
- return CURLE_INTERFACE_FAILED;
- }
- infof(data, "Local port: %hu\n", port);
- conn->bits.bound = TRUE;
- return CURLE_OK;
- }
-
- if(--portnum > 0) {
- infof(data, "Bind to local port %hu failed, trying next\n", port);
- port++; /* try next port */
- /* We re-use/clobber the port variable here below */
- if(sock->sa_family == AF_INET)
- si4->sin_port = ntohs(port);
-#ifdef ENABLE_IPV6
- else
- si6->sin6_port = ntohs(port);
-#endif
- }
- else
- break;
- }
-
- data->state.os_errno = error = SOCKERRNO;
- failf(data, "bind failed with errno %d: %s",
- error, Curl_strerror(conn, error));
-
- 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;
- curl_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);
-#elif !defined(CURL_WINRT)
- 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 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. */
-CURL_STATIC 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_primary_port = conn->primary_port;
- conn->data->info.conn_local_port = conn->local_port;
-}
-
-/* retrieves ip address and port from a sockaddr structure */
-static 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*) 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*)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;
- snprintf(addr, MAX_IPADR_LEN, "%s", su->sun_path);
- *port = 0;
- return TRUE;
-#endif
- default:
- break;
- }
-
- addr[0] = '\0';
- *port = 0;
-
- return FALSE;
-}
-
-/* retrieves the start/end point information of a socket of an established
- connection */
-CURL_STATIC 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 SessionHandle *data = conn->data;
-
- if(conn->socktype == SOCK_DGRAM)
- /* there's no connection! */
- return;
-
- if(!conn->bits.reuse) {
- int error;
-
- len = sizeof(struct Curl_sockaddr_storage);
- if(getpeername(sockfd, (struct sockaddr*) &ssrem, &len)) {
- error = SOCKERRNO;
- failf(data, "getpeername() failed with errno %d: %s",
- error, Curl_strerror(conn, error));
- return;
- }
-
- len = sizeof(struct Curl_sockaddr_storage);
- memset(&ssloc, 0, sizeof(ssloc));
- if(getsockname(sockfd, (struct sockaddr*) &ssloc, &len)) {
- error = SOCKERRNO;
- failf(data, "getsockname() failed with errno %d: %s",
- error, Curl_strerror(conn, error));
- return;
- }
-
- if(!getaddressinfo((struct sockaddr*)&ssrem,
- conn->primary_ip, &conn->primary_port)) {
- error = ERRNO;
- failf(data, "ssrem inet_ntop() failed with errno %d: %s",
- error, Curl_strerror(conn, error));
- return;
- }
- memcpy(conn->ip_addr_str, conn->primary_ip, MAX_IPADR_LEN);
-
- if(!getaddressinfo((struct sockaddr*)&ssloc,
- conn->local_ip, &conn->local_port)) {
- error = ERRNO;
- failf(data, "ssloc inet_ntop() failed with errno %d: %s",
- error, Curl_strerror(conn, error));
- return;
- }
-
- }
-
- /* persist connection info in session handle */
- Curl_persistconninfo(conn);
-}
-
-/*
- * Curl_is_connected() checks if the socket has connected.
- */
-
-CURL_STATIC CURLcode Curl_is_connected(struct connectdata *conn,
- int sockindex,
- bool *connected)
-{
- struct SessionHandle *data = conn->data;
- CURLcode result = CURLE_OK;
- long allow;
- int error = 0;
- struct timeval 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_tvnow();
-
- /* 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 = Curl_socket_ready(CURL_SOCKET_BAD, conn->tempsock[i], 0);
-
- if(rc == 0) { /* no connection yet */
- if(curlx_tvdiff(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 &&
- curlx_tvdiff(now, conn->connecttime) >= HAPPY_EYEBALLS_TIMEOUT) {
- trynextip(conn, sockindex, 1);
- }
- }
- else if(rc == CURL_CSELECT_OUT) {
- 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;
-
- /* 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;
- }
- else
- 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];
- 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(conn, error));
-
- 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 */
-
- /* 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;
- }
-
- failf(data, "Failed to connect to %s port %ld: %s",
- conn->bits.proxy?conn->proxy.name:conn->host.name,
- conn->port, Curl_strerror(conn, error));
- }
-
- return result;
-}
-
-static void tcpnodelay(struct connectdata *conn,
- curl_socket_t sockfd)
-{
-#ifdef TCP_NODELAY
- struct SessionHandle *data= conn->data;
- curl_socklen_t onoff = (curl_socklen_t) data->set.tcp_nodelay;
- int level = 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)
- level = pe->p_proto;
-#endif
-
- if(setsockopt(sockfd, level, 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) 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.
-
- http://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
-
-CURL_STATIC void Curl_sndbufset(curl_socket_t sockfd)
-{
- int val = CURL_MAX_WRITE_SIZE + 32;
- int curval = 0;
- int curlen = sizeof(curval);
- DWORD majorVersion = 6;
-
- static int detectOsState = DETECT_OS_NONE;
-
- if(detectOsState == DETECT_OS_NONE) {
-#if !defined(_WIN32_WINNT) || !defined(_WIN32_WINNT_WIN2K) || \
- (_WIN32_WINNT < _WIN32_WINNT_WIN2K)
- OSVERSIONINFO osver;
-
- memset(&osver, 0, sizeof(osver));
- osver.dwOSVersionInfoSize = sizeof(osver);
-
- detectOsState = DETECT_OS_PREVISTA;
- if(GetVersionEx(&osver)) {
- if(osver.dwMajorVersion >= majorVersion)
- detectOsState = DETECT_OS_VISTA_OR_LATER;
- }
-#elif defined(CURL_WINRT)
- detectOsState = DETECT_OS_VISTA_OR_LATER;
-#else
- ULONGLONG majorVersionMask;
- OSVERSIONINFOEX osver;
-
- memset(&osver, 0, sizeof(osver));
- osver.dwOSVersionInfoSize = sizeof(osver);
- osver.dwMajorVersion = majorVersion;
- majorVersionMask = VerSetConditionMask(0, VER_MAJORVERSION,
- VER_GREATER_EQUAL);
-
- if(VerifyVersionInfo(&osver, VER_MAJORVERSION, majorVersionMask))
- detectOsState = DETECT_OS_VISTA_OR_LATER;
- else
- detectOsState = DETECT_OS_PREVISTA;
-#endif
- }
-
- 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;
- int error = 0;
- bool isconnected = FALSE;
- struct SessionHandle *data = conn->data;
- curl_socket_t sockfd;
- CURLcode result;
- char ipaddress[MAX_IPADR_LEN];
- long port;
- bool is_tcp;
-
- *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 */
- error = ERRNO;
- failf(data, "sa_addr inet_ntop() failed with errno %d: %s",
- error, Curl_strerror(conn, error));
- 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 */
- error = data->set.fsockopt(data->set.sockopt_client,
- sockfd,
- CURLSOCKTYPE_IPCXN);
-
- 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_tvnow();
- if(conn->num_addr > 1)
- Curl_expire_latest(data, conn->timeoutms_per_addr);
-
- /* Connect TCP sockets, bind UDP */
- if(!isconnected && (conn->socktype == SOCK_STREAM)) {
- rc = connect(sockfd, &addr.sa_addr, addr.addrlen);
- if(-1 == rc)
- error = SOCKERRNO;
- }
- else {
- *sockp = sockfd;
- return CURLE_OK;
- }
-
-#ifdef ENABLE_IPV6
- conn->bits.ipv6 = (addr.family == AF_INET6)?TRUE:FALSE;
-#endif
-
- 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(conn, error));
- 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.
- */
-
-CURL_STATIC CURLcode Curl_connecthost(struct connectdata *conn, /* context */
- const struct Curl_dns_entry *remotehost)
-{
- struct SessionHandle *data = conn->data;
- struct timeval before = Curl_tvnow();
- CURLcode result = CURLE_COULDNT_CONNECT;
-
- long 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;
- Curl_expire(conn->data, HAPPY_EYEBALLS_TIMEOUT);
-
- /* 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)
- return result;
-
- data->info.numconnects++; /* to track the number of connections made */
-
- 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 SessionHandle.
- *
- * The returned socket will be CURL_SOCKET_BAD in case of failure!
- */
-CURL_STATIC curl_socket_t Curl_getconnectinfo(struct SessionHandle *data,
- struct connectdata **connp)
-{
- curl_socket_t sockfd;
-
- 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->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;
- sockfd = 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))
- return CURL_SOCKET_BAD; /* 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) {
- return CURL_SOCKET_BAD; /* FIN received */
- }
- }
-#endif
- }
- else
- return CURL_SOCKET_BAD;
-
- return sockfd;
-}
-
-/*
- * Close a socket.
- *
- * 'conn' can be NULL, beware!
- */
-CURL_STATIC 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 {
- Curl_multi_closed(conn, sock);
- return conn->fclosesocket(conn->closesocket_client, sock);
- }
- }
-
- if(conn)
- /* tell the multi-socket code about this */
- Curl_multi_closed(conn, 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!
- *
- */
-CURL_STATIC CURLcode Curl_socket(struct connectdata *conn,
- const Curl_addrinfo *ai,
- struct Curl_sockaddr_ex *addr,
- curl_socket_t *sockfd)
-{
- struct SessionHandle *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.
- */
- *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 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;
-
-}
-
-#ifdef CURLDEBUG
-/*
- * Curl_conncontrol() is used to set the conn->bits.close bit on or off. It
- * MUST be called with the connclose() or connkeep() macros with a stated
- * reason. The reason is only shown in debug builds but helps to figure out
- * decision paths when connections are or aren't re-used as expected.
- */
-CURL_STATIC void Curl_conncontrol(struct connectdata *conn, bool closeit,
- const char *reason)
-{
-#if defined(CURL_DISABLE_VERBOSE_STRINGS)
- (void) reason;
-#endif
- if(closeit != conn->bits.close) {
- 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 */
- }
-}
-#endif
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