diff options
Diffstat (limited to 'mobicore/common/curl/lib/connect.c')
-rw-r--r-- | mobicore/common/curl/lib/connect.c | 1138 |
1 files changed, 0 insertions, 1138 deletions
diff --git a/mobicore/common/curl/lib/connect.c b/mobicore/common/curl/lib/connect.c deleted file mode 100644 index 7638854..0000000 --- a/mobicore/common/curl/lib/connect.c +++ /dev/null @@ -1,1138 +0,0 @@ -/*************************************************************************** - * _ _ ____ _ - * Project ___| | | | _ \| | - * / __| | | | |_) | | - * | (__| |_| | _ <| |___ - * \___|\___/|_| \_\_____| - * - * Copyright (C) 1998 - 2010, 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 "setup.h" - -#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> -#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 <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 "curl_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 "inet_pton.h" -#include "sslgen.h" /* for Curl_ssl_check_cxn() */ -#include "progress.h" - -/* 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 CURLcode -singleipconnect(struct connectdata *conn, - const Curl_addrinfo *ai, /* start connecting to this */ - long timeout_ms, - curl_socket_t *sock, - 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); - if(!timeout_ms) - /* avoid returning 0 as that means no timeout! */ - return -1; - - return timeout_ms; -} - -/* - * waitconnect() waits for a TCP connect on the given socket for the specified - * number if milliseconds. It returns: - */ - -#define WAITCONN_CONNECTED 0 -#define WAITCONN_SELECT_ERROR -1 -#define WAITCONN_TIMEOUT 1 -#define WAITCONN_FDSET_ERROR 2 -#define WAITCONN_ABORTED 3 - -static -int waitconnect(struct connectdata *conn, - 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 - - for(;;) { - - /* now select() until we get connect or timeout */ - rc = Curl_socket_ready(CURL_SOCKET_BAD, sockfd, (int)(timeout_msec>1000? - 1000:timeout_msec)); - if(Curl_pgrsUpdate(conn)) - return WAITCONN_ABORTED; - - if(-1 == rc) - /* error, no connect here, try next */ - return WAITCONN_SELECT_ERROR; - - else if(0 == rc) { - /* timeout */ - timeout_msec -= 1000; - if(timeout_msec <= 0) - return WAITCONN_TIMEOUT; - - continue; - } - - if(rc & CURL_CSELECT_ERR) - /* error condition caught */ - return WAITCONN_FDSET_ERROR; - - break; - } - return WAITCONN_CONNECTED; -} - -static CURLcode bindlocal(struct connectdata *conn, - curl_socket_t sockfd, int af) -{ - 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; - char myhost[256] = ""; - int done = 0; /* -1 for error, 1 for address found */ - - /************************************************************* - * 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) ) { - - /* interface */ - if(Curl_if2ip(af, dev, myhost, sizeof(myhost))) { - /* - * 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 - } - else { - /* - * 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_wait_for_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) && - (Curl_inet_pton(AF_INET6, myhost, &si6->sin6_addr) > 0)) { - si6->sin6_family = AF_INET6; - si6->sin6_port = htons(port); - 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); -#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 CURLcode trynextip(struct connectdata *conn, - int sockindex, - bool *connected) -{ - curl_socket_t sockfd; - Curl_addrinfo *ai; - - /* 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->sock[sockindex]; - conn->sock[sockindex] = CURL_SOCKET_BAD; - *connected = FALSE; - - if(sockindex != FIRSTSOCKET) { - sclose(fd_to_close); - return CURLE_COULDNT_CONNECT; /* no next */ - } - - /* try the next address */ - ai = conn->ip_addr->ai_next; - - while(ai) { - CURLcode res = singleipconnect(conn, ai, 0L, &sockfd, connected); - if(res) - return res; - if(sockfd != CURL_SOCKET_BAD) { - /* store the new socket descriptor */ - conn->sock[sockindex] = sockfd; - conn->ip_addr = ai; - sclose(fd_to_close); - return CURLE_OK; - } - ai = ai->ai_next; - } - sclose(fd_to_close); - return CURLE_COULDNT_CONNECT; -} - -/* 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_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 */ -void Curl_updateconninfo(struct connectdata *conn, curl_socket_t sockfd) -{ - int error; - curl_socklen_t len; - struct Curl_sockaddr_storage ssrem; - struct Curl_sockaddr_storage ssloc; - struct SessionHandle *data = conn->data; - - if(!conn->bits.reuse) { - - 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); - 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; - } - - 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() 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; - int error = 0; - - DEBUGASSERT(sockindex >= FIRSTSOCKET && sockindex <= SECONDARYSOCKET); - - *connected = FALSE; /* a very negative world view is best */ - - if(conn->bits.tcpconnect) { - /* we are connected already! */ - *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; - } - - /* check for connect without timeout as we want to return immediately */ - rc = waitconnect(conn, sockfd, 0); - if(WAITCONN_TIMEOUT == rc) - /* not an error, but also no connection yet */ - return code; - - if(WAITCONN_CONNECTED == rc) { - if(verifyconnect(sockfd, &error)) { - /* we are connected, awesome! */ - conn->bits.tcpconnect = TRUE; - *connected = TRUE; - Curl_pgrsTime(data, TIMER_CONNECT); /* connect done */ - Curl_verboseconnect(conn); - Curl_updateconninfo(conn, sockfd); - - return CURLE_OK; - } - /* nope, not connected for real */ - } - else { - /* nope, not connected */ - if(WAITCONN_FDSET_ERROR == rc) { - (void)verifyconnect(sockfd, &error); - infof(data, "%s\n",Curl_strerror(conn, error)); - } - else - infof(data, "Connection failed\n"); - } - - /* - * 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); - } - - code = trynextip(conn, sockindex, connected); - - if(code) { - error = SOCKERRNO; - data->state.os_errno = error; - failf(data, "Failed connect to %s:%ld; %s", - conn->host.name, conn->port, Curl_strerror(conn, error)); - } - - return code; -} - -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 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 - -#ifdef WIN32 -/* 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 - -*/ -void Curl_sndbufset(curl_socket_t sockfd) -{ - int val = CURL_MAX_WRITE_SIZE + 32; - int curval = 0; - int curlen = sizeof(curval); - - 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 if used from the multi interface. - */ -static CURLcode -singleipconnect(struct connectdata *conn, - const Curl_addrinfo *ai, - long timeout_ms, - curl_socket_t *sockp, - bool *connected) -{ - struct Curl_sockaddr_ex addr; - int rc; - int error; - bool isconnected; - struct SessionHandle *data = conn->data; - curl_socket_t sockfd; - CURLcode res = CURLE_OK; -#if defined(ENABLE_IPV6) && defined(HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID) - struct sockaddr_in6 * const sa6 = (void *)&addr.sa_addr; -#endif - - *sockp = CURL_SOCKET_BAD; - - /* - * 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 CURLE_OK; - -#if defined(ENABLE_IPV6) && defined(HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID) - if (conn->scope && (addr.family == AF_INET6)) - sa6->sin6_scope_id = conn->scope; -#endif - - /* store remote address and port used in this connection attempt */ - if(!getaddressinfo((struct sockaddr*)&addr.sa_addr, - conn->primary_ip, &conn->primary_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)); - sclose(sockfd); - return CURLE_OK; - } - memcpy(conn->ip_addr_str, conn->primary_ip, MAX_IPADR_LEN); - infof(data, " Trying %s... ", conn->ip_addr_str); - - Curl_persistconninfo(conn); - -#ifdef ENABLE_IPV6 - if(addr.family == AF_INET6) - conn->bits.ipv6 = TRUE; -#endif - - if(data->set.tcp_nodelay) - tcpnodelay(conn, sockfd); - - nosigpipe(conn, sockfd); - - Curl_sndbufset(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 res; - } - } - - /* 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 res; - } - - /* set socket non-blocking */ - curlx_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) -#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 - rc = waitconnect(conn, sockfd, timeout_ms); - if(WAITCONN_ABORTED == rc) { - sclose(sockfd); - return CURLE_ABORTED_BY_CALLBACK; - } - break; - default: - /* unknown error, fallthrough and try another address! */ - failf(data, "Failed to connect to %s: %s", - conn->ip_addr_str, 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 */ - *sockp = sockfd; - return CURLE_OK; - } - - isconnected = verifyconnect(sockfd, &error); - - if(!rc && isconnected) { - /* we are connected, awesome! */ - *connected = TRUE; /* this is a true connect */ - infof(data, "connected\n"); - Curl_updateconninfo(conn, sockfd); - *sockp = sockfd; - return CURLE_OK; - } - 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 CURLE_OK; -} - -/* - * 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; - } - - /* 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 */ - CURLcode res = - singleipconnect(conn, curr_addr, timeout_per_addr, &sockfd, connected); - - if(res) - return res; - - 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 returned socket will be CURL_SOCKET_BAD in case of failure! - */ -curl_socket_t Curl_getconnectinfo(struct SessionHandle *data, - struct connectdata **connp) -{ - curl_socket_t sockfd; - 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; - 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; -} |