diff options
Diffstat (limited to 'Utilities/cmcurl/hostthre.c')
| -rw-r--r-- | Utilities/cmcurl/hostthre.c | 840 |
1 files changed, 0 insertions, 840 deletions
diff --git a/Utilities/cmcurl/hostthre.c b/Utilities/cmcurl/hostthre.c deleted file mode 100644 index 12e31ea..0000000 --- a/Utilities/cmcurl/hostthre.c +++ /dev/null @@ -1,840 +0,0 @@ -/*************************************************************************** - * _ _ ____ _ - * Project ___| | | | _ \| | - * / __| | | | |_) | | - * | (__| |_| | _ <| |___ - * \___|\___/|_| \_\_____| - * - * Copyright (C) 1998 - 2006, 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. - * - * $Id$ - ***************************************************************************/ - -#include "setup.h" - -#include <string.h> -#include <errno.h> - -#ifdef NEED_MALLOC_H -#include <malloc.h> -#endif -#ifdef HAVE_SYS_TYPES_H -#include <sys/types.h> -#endif -#ifdef HAVE_SYS_SOCKET_H -#include <sys/socket.h> -#endif -#ifdef HAVE_NETINET_IN_H -#include <netinet/in.h> -#endif -#ifdef HAVE_NETDB_H -#include <netdb.h> -#endif -#ifdef HAVE_ARPA_INET_H -#include <arpa/inet.h> -#endif -#ifdef HAVE_STDLIB_H -#include <stdlib.h> /* required for free() prototypes */ -#endif -#ifdef HAVE_UNISTD_H -#include <unistd.h> /* for the close() proto */ -#endif -#ifdef VMS -#include <in.h> -#include <inet.h> -#include <stdlib.h> -#endif - -#ifdef HAVE_SETJMP_H -#include <setjmp.h> -#endif - -#ifdef HAVE_PROCESS_H -#include <process.h> -#endif - -#if (defined(NETWARE) && defined(__NOVELL_LIBC__)) -#undef in_addr_t -#define in_addr_t unsigned long -#endif - -#include "urldata.h" -#include "sendf.h" -#include "hostip.h" -#include "hash.h" -#include "share.h" -#include "strerror.h" -#include "url.h" -#include "multiif.h" - -#define _MPRINTF_REPLACE /* use our functions only */ -#include <curl/mprintf.h> - -#include "inet_ntop.h" - -#include "memory.h" -/* The last #include file should be: */ -#include "memdebug.h" - -#if defined(_MSC_VER) && defined(CURL_NO__BEGINTHREADEX) -#pragma message ("No _beginthreadex() available in this RTL") -#endif - -/*********************************************************************** - * Only for Windows threaded name resolves builds - **********************************************************************/ -#ifdef CURLRES_THREADED - -/* This function is used to init a threaded resolve */ -static bool init_resolve_thread(struct connectdata *conn, - const char *hostname, int port, - const Curl_addrinfo *hints); - -#ifdef CURLRES_IPV4 - #define THREAD_FUNC gethostbyname_thread - #define THREAD_NAME "gethostbyname_thread" -#else - #define THREAD_FUNC getaddrinfo_thread - #define THREAD_NAME "getaddrinfo_thread" -#endif - -#if defined(DEBUG_THREADING_GETHOSTBYNAME) || \ - defined(DEBUG_THREADING_GETADDRINFO) -/* If this is defined, provide tracing */ -#define TRACE(args) \ - do { trace_it("%u: ", __LINE__); trace_it args; } while (0) - -static void trace_it (const char *fmt, ...) -{ - static int do_trace = -1; - va_list args; - - if (do_trace == -1) { - const char *env = getenv("CURL_TRACE"); - do_trace = (env && atoi(env) > 0); - } - if (!do_trace) - return; - va_start (args, fmt); - vfprintf (stderr, fmt, args); - fflush (stderr); - va_end (args); -} -#else -#define TRACE(x) -#endif - -#ifdef DEBUG_THREADING_GETADDRINFO -static void dump_addrinfo (struct connectdata *conn, const struct addrinfo *ai) -{ - TRACE(("dump_addrinfo:\n")); - for ( ; ai; ai = ai->ai_next) { - char buf [INET6_ADDRSTRLEN]; - - trace_it(" fam %2d, CNAME %s, ", - ai->ai_family, ai->ai_canonname ? ai->ai_canonname : "<none>"); - if (Curl_printable_address(ai, buf, sizeof(buf))) - trace_it("%s\n", buf); - else - trace_it("failed; %s\n", Curl_strerror(conn,WSAGetLastError())); - } -} -#endif - -struct thread_data { - HANDLE thread_hnd; - unsigned thread_id; - DWORD thread_status; - curl_socket_t dummy_sock; /* dummy for Curl_resolv_fdset() */ - HANDLE mutex_waiting; /* marks that we are still waiting for a resolve */ - HANDLE event_resolved; /* marks that the thread obtained the information */ - HANDLE event_thread_started; /* marks that the thread has initialized and - started */ - HANDLE mutex_terminate; /* serializes access to flag_terminate */ - HANDLE event_terminate; /* flag for thread to terminate instead of calling - callbacks */ -#ifdef CURLRES_IPV6 - struct addrinfo hints; -#endif -}; - -/* Data for synchronization between resolver thread and its parent */ -struct thread_sync_data { - HANDLE mutex_waiting; /* thread_data.mutex_waiting duplicate */ - HANDLE mutex_terminate; /* thread_data.mutex_terminate duplicate */ - HANDLE event_terminate; /* thread_data.event_terminate duplicate */ - char * hostname; /* hostname to resolve, Curl_async.hostname - duplicate */ -}; - -/* Destroy resolver thread synchronization data */ -static -void destroy_thread_sync_data(struct thread_sync_data * tsd) -{ - if (tsd->hostname) { - free(tsd->hostname); - tsd->hostname = NULL; - } - if (tsd->event_terminate) { - CloseHandle(tsd->event_terminate); - tsd->event_terminate = NULL; - } - if (tsd->mutex_terminate) { - CloseHandle(tsd->mutex_terminate); - tsd->mutex_terminate = NULL; - } - if (tsd->mutex_waiting) { - CloseHandle(tsd->mutex_waiting); - tsd->mutex_waiting = NULL; - } -} - -/* Initialize resolver thread synchronization data */ -static -BOOL init_thread_sync_data(struct thread_data * td, - char * hostname, - struct thread_sync_data * tsd) -{ - HANDLE curr_proc = GetCurrentProcess(); - - memset(tsd, 0, sizeof(*tsd)); - if (!DuplicateHandle(curr_proc, td->mutex_waiting, - curr_proc, &tsd->mutex_waiting, 0, FALSE, - DUPLICATE_SAME_ACCESS)) { - /* failed to duplicate the mutex, no point in continuing */ - destroy_thread_sync_data(tsd); - return FALSE; - } - if (!DuplicateHandle(curr_proc, td->mutex_terminate, - curr_proc, &tsd->mutex_terminate, 0, FALSE, - DUPLICATE_SAME_ACCESS)) { - /* failed to duplicate the mutex, no point in continuing */ - destroy_thread_sync_data(tsd); - return FALSE; - } - if (!DuplicateHandle(curr_proc, td->event_terminate, - curr_proc, &tsd->event_terminate, 0, FALSE, - DUPLICATE_SAME_ACCESS)) { - /* failed to duplicate the event, no point in continuing */ - destroy_thread_sync_data(tsd); - return FALSE; - } - /* Copying hostname string because original can be destroyed by parent - * thread during gethostbyname execution. - */ - tsd->hostname = strdup(hostname); - if (!tsd->hostname) { - /* Memory allocation failed */ - destroy_thread_sync_data(tsd); - return FALSE; - } - return TRUE; -} - -/* acquire resolver thread synchronization */ -static -BOOL acquire_thread_sync(struct thread_sync_data * tsd) -{ - /* is the thread initiator still waiting for us ? */ - if (WaitForSingleObject(tsd->mutex_waiting, 0) == WAIT_TIMEOUT) { - /* yes, it is */ - - /* Waiting access to event_terminate */ - if (WaitForSingleObject(tsd->mutex_terminate, INFINITE) != WAIT_OBJECT_0) { - /* Something went wrong - now just ignoring */ - } - else { - if (WaitForSingleObject(tsd->event_terminate, 0) != WAIT_TIMEOUT) { - /* Parent thread signaled us to terminate. - * This means that all data in conn->async is now destroyed - * and we cannot use it. - */ - } - else { - return TRUE; - } - } - } - return FALSE; -} - -/* release resolver thread synchronization */ -static -void release_thread_sync(struct thread_sync_data * tsd) -{ - ReleaseMutex(tsd->mutex_terminate); -} - -#if defined(CURLRES_IPV4) -/* - * gethostbyname_thread() resolves a name, calls the Curl_addrinfo4_callback - * and then exits. - * - * For builds without ARES/ENABLE_IPV6, create a resolver thread and wait on - * it. - */ -static unsigned __stdcall gethostbyname_thread (void *arg) -{ - struct connectdata *conn = (struct connectdata*) arg; - struct thread_data *td = (struct thread_data*) conn->async.os_specific; - struct hostent *he; - int rc = 0; - - /* Duplicate the passed mutex and event handles. - * This allows us to use it even after the container gets destroyed - * due to a resolver timeout. - */ - struct thread_sync_data tsd = { 0,0,0,NULL }; - if (!init_thread_sync_data(td, conn->async.hostname, &tsd)) { - /* thread synchronization data initialization failed */ - return (unsigned)-1; - } - - WSASetLastError (conn->async.status = NO_DATA); /* pending status */ - - /* Signaling that we have initialized all copies of data and handles we - need */ - SetEvent(td->event_thread_started); - - he = gethostbyname (tsd.hostname); - - /* is parent thread waiting for us and are we able to access conn members? */ - if (acquire_thread_sync(&tsd)) { - /* Mark that we have obtained the information, and that we are calling - * back with it. */ - SetEvent(td->event_resolved); - if (he) { - rc = Curl_addrinfo4_callback(conn, CURL_ASYNC_SUCCESS, he); - } - else { - rc = Curl_addrinfo4_callback(conn, (int)WSAGetLastError(), NULL); - } - TRACE(("Winsock-error %d, addr %s\n", conn->async.status, - he ? inet_ntoa(*(struct in_addr*)he->h_addr) : "unknown")); - release_thread_sync(&tsd); - } - - /* clean up */ - destroy_thread_sync_data(&tsd); - - return (rc); - /* An implicit _endthreadex() here */ -} - -#elif defined(CURLRES_IPV6) - -/* - * getaddrinfo_thread() resolves a name, calls Curl_addrinfo6_callback and then - * exits. - * - * For builds without ARES, but with ENABLE_IPV6, create a resolver thread - * and wait on it. - */ -static unsigned __stdcall getaddrinfo_thread (void *arg) -{ - struct connectdata *conn = (struct connectdata*) arg; - struct thread_data *td = (struct thread_data*) conn->async.os_specific; - struct addrinfo *res; - char service [NI_MAXSERV]; - int rc; - struct addrinfo hints = td->hints; - - /* Duplicate the passed mutex handle. - * This allows us to use it even after the container gets destroyed - * due to a resolver timeout. - */ - struct thread_sync_data tsd = { 0,0,0,NULL }; - if (!init_thread_sync_data(td, conn->async.hostname, &tsd)) { - /* thread synchronization data initialization failed */ - return -1; - } - - itoa(conn->async.port, service, 10); - - WSASetLastError(conn->async.status = NO_DATA); /* pending status */ - - /* Signaling that we have initialized all copies of data and handles we - need */ - SetEvent(td->event_thread_started); - - rc = getaddrinfo(tsd.hostname, service, &hints, &res); - - /* is parent thread waiting for us and are we able to access conn members? */ - if (acquire_thread_sync(&tsd)) { - /* Mark that we have obtained the information, and that we are calling - back with it. */ - SetEvent(td->event_resolved); - - if (rc == 0) { -#ifdef DEBUG_THREADING_GETADDRINFO - dump_addrinfo (conn, res); -#endif - rc = Curl_addrinfo6_callback(conn, CURL_ASYNC_SUCCESS, res); - } - else { - rc = Curl_addrinfo6_callback(conn, (int)WSAGetLastError(), NULL); - TRACE(("Winsock-error %d, no address\n", conn->async.status)); - } - release_thread_sync(&tsd); - } - - /* clean up */ - destroy_thread_sync_data(&tsd); - - return (rc); - /* An implicit _endthreadex() here */ -} -#endif - -/* - * Curl_destroy_thread_data() cleans up async resolver data and thread handle. - * Complementary of ares_destroy. - */ -void Curl_destroy_thread_data (struct Curl_async *async) -{ - if (async->hostname) - free(async->hostname); - - if (async->os_specific) { - struct thread_data *td = (struct thread_data*) async->os_specific; - curl_socket_t sock = td->dummy_sock; - - if (td->mutex_terminate && td->event_terminate) { - /* Signaling resolver thread to terminate */ - if (WaitForSingleObject(td->mutex_terminate, INFINITE) == WAIT_OBJECT_0) { - SetEvent(td->event_terminate); - ReleaseMutex(td->mutex_terminate); - } - else { - /* Something went wrong - just ignoring it */ - } - } - - if (td->mutex_terminate) - CloseHandle(td->mutex_terminate); - if (td->event_terminate) - CloseHandle(td->event_terminate); - if (td->event_thread_started) - CloseHandle(td->event_thread_started); - - if (sock != CURL_SOCKET_BAD) - sclose(sock); - - /* destroy the synchronization objects */ - if (td->mutex_waiting) - CloseHandle(td->mutex_waiting); - td->mutex_waiting = NULL; - if (td->event_resolved) - CloseHandle(td->event_resolved); - - if (td->thread_hnd) - CloseHandle(td->thread_hnd); - - free(async->os_specific); - } - async->hostname = NULL; - async->os_specific = NULL; -} - -/* - * init_resolve_thread() starts a new thread that performs the actual - * resolve. This function returns before the resolve is done. - * - * Returns FALSE in case of failure, otherwise TRUE. - */ -static bool init_resolve_thread (struct connectdata *conn, - const char *hostname, int port, - const Curl_addrinfo *hints) -{ - struct thread_data *td = calloc(sizeof(*td), 1); - HANDLE thread_and_event[2] = {0}; - - if (!td) { - SetLastError(ENOMEM); - return FALSE; - } - - Curl_safefree(conn->async.hostname); - conn->async.hostname = strdup(hostname); - if (!conn->async.hostname) { - free(td); - SetLastError(ENOMEM); - return FALSE; - } - - conn->async.port = port; - conn->async.done = FALSE; - conn->async.status = 0; - conn->async.dns = NULL; - conn->async.os_specific = (void*) td; - td->dummy_sock = CURL_SOCKET_BAD; - - /* Create the mutex used to inform the resolver thread that we're - * still waiting, and take initial ownership. - */ - td->mutex_waiting = CreateMutex(NULL, TRUE, NULL); - if (td->mutex_waiting == NULL) { - Curl_destroy_thread_data(&conn->async); - SetLastError(EAGAIN); - return FALSE; - } - - /* Create the event that the thread uses to inform us that it's - * done resolving. Do not signal it. - */ - td->event_resolved = CreateEvent(NULL, TRUE, FALSE, NULL); - if (td->event_resolved == NULL) { - Curl_destroy_thread_data(&conn->async); - SetLastError(EAGAIN); - return FALSE; - } - /* Create the mutex used to serialize access to event_terminated - * between us and resolver thread. - */ - td->mutex_terminate = CreateMutex(NULL, FALSE, NULL); - if (td->mutex_terminate == NULL) { - Curl_destroy_thread_data(&conn->async); - SetLastError(EAGAIN); - return FALSE; - } - /* Create the event used to signal thread that it should terminate. - */ - td->event_terminate = CreateEvent(NULL, TRUE, FALSE, NULL); - if (td->event_terminate == NULL) { - Curl_destroy_thread_data(&conn->async); - SetLastError(EAGAIN); - return FALSE; - } - /* Create the event used by thread to inform it has initialized its own data. - */ - td->event_thread_started = CreateEvent(NULL, TRUE, FALSE, NULL); - if (td->event_thread_started == NULL) { - Curl_destroy_thread_data(&conn->async); - SetLastError(EAGAIN); - return FALSE; - } - -#ifdef _WIN32_WCE - td->thread_hnd = (HANDLE) CreateThread(NULL, 0, - (LPTHREAD_START_ROUTINE) THREAD_FUNC, - conn, 0, &td->thread_id); -#else - td->thread_hnd = (HANDLE) _beginthreadex(NULL, 0, THREAD_FUNC, - conn, 0, &td->thread_id); -#endif - -#ifdef CURLRES_IPV6 - curlassert(hints); - td->hints = *hints; -#else - (void) hints; -#endif - - if (!td->thread_hnd) { -#ifdef _WIN32_WCE - TRACE(("CreateThread() failed; %s\n", Curl_strerror(conn,GetLastError()))); -#else - SetLastError(errno); - TRACE(("_beginthreadex() failed; %s\n", Curl_strerror(conn,errno))); -#endif - Curl_destroy_thread_data(&conn->async); - return FALSE; - } - /* Waiting until the thread will initialize its data or it will exit due errors. - */ - thread_and_event[0] = td->thread_hnd; - thread_and_event[1] = td->event_thread_started; - if (WaitForMultipleObjects(sizeof(thread_and_event) / - sizeof(thread_and_event[0]), - (const HANDLE*)thread_and_event, FALSE, - INFINITE) == WAIT_FAILED) { - /* The resolver thread has been created, - * most probably it works now - ignoring this "minor" error - */ - } - /* This socket is only to keep Curl_resolv_fdset() and select() happy; - * should never become signalled for read/write since it's unbound but - * Windows needs atleast 1 socket in select(). - */ - td->dummy_sock = socket(AF_INET, SOCK_DGRAM, 0); - return TRUE; -} - - -/* - * Curl_wait_for_resolv() waits for a resolve to finish. This function should - * be avoided since using this risk getting the multi interface to "hang". - * - * If 'entry' is non-NULL, make it point to the resolved dns entry - * - * This is the version for resolves-in-a-thread. - */ -CURLcode Curl_wait_for_resolv(struct connectdata *conn, - struct Curl_dns_entry **entry) -{ - struct thread_data *td = (struct thread_data*) conn->async.os_specific; - struct SessionHandle *data = conn->data; - long timeout; - DWORD status, ticks; - CURLcode rc; - - curlassert (conn && td); - - /* now, see if there's a connect timeout or a regular timeout to - use instead of the default one */ - timeout = - conn->data->set.connecttimeout ? conn->data->set.connecttimeout : - conn->data->set.timeout ? conn->data->set.timeout : - CURL_TIMEOUT_RESOLVE; /* default name resolve timeout */ - ticks = GetTickCount(); - - /* wait for the thread to resolve the name */ - status = WaitForSingleObject(td->event_resolved, 1000UL*timeout); - - /* mark that we are now done waiting */ - ReleaseMutex(td->mutex_waiting); - - /* close our handle to the mutex, no point in hanging on to it */ - CloseHandle(td->mutex_waiting); - td->mutex_waiting = NULL; - - /* close the event handle, it's useless now */ - CloseHandle(td->event_resolved); - td->event_resolved = NULL; - - /* has the resolver thread succeeded in resolving our query ? */ - if (status == WAIT_OBJECT_0) { - /* wait for the thread to exit, it's in the callback sequence */ - if (WaitForSingleObject(td->thread_hnd, 5000) == WAIT_TIMEOUT) { - TerminateThread(td->thread_hnd, 0); - conn->async.done = TRUE; - td->thread_status = (DWORD)-1; - TRACE(("%s() thread stuck?!, ", THREAD_NAME)); - } - else { - /* Thread finished before timeout; propagate Winsock error to this - * thread. 'conn->async.done = TRUE' is set in - * Curl_addrinfo4/6_callback(). - */ - WSASetLastError(conn->async.status); - GetExitCodeThread(td->thread_hnd, &td->thread_status); - TRACE(("%s() status %lu, thread retval %lu, ", - THREAD_NAME, status, td->thread_status)); - } - } - else { - conn->async.done = TRUE; - td->thread_status = (DWORD)-1; - TRACE(("%s() timeout, ", THREAD_NAME)); - } - - TRACE(("elapsed %lu ms\n", GetTickCount()-ticks)); - - if(entry) - *entry = conn->async.dns; - - rc = CURLE_OK; - - if (!conn->async.dns) { - /* a name was not resolved */ - if (td->thread_status == CURLE_OUT_OF_MEMORY) { - rc = CURLE_OUT_OF_MEMORY; - failf(data, "Could not resolve host: %s", curl_easy_strerror(rc)); - } - else if(conn->async.done) { - if(conn->bits.httpproxy) { - failf(data, "Could not resolve proxy: %s; %s", - conn->proxy.dispname, Curl_strerror(conn, conn->async.status)); - rc = CURLE_COULDNT_RESOLVE_PROXY; - } - else { - failf(data, "Could not resolve host: %s; %s", - conn->host.name, Curl_strerror(conn, conn->async.status)); - rc = CURLE_COULDNT_RESOLVE_HOST; - } - } - else if (td->thread_status == (DWORD)-1 || conn->async.status == NO_DATA) { - failf(data, "Resolving host timed out: %s", conn->host.name); - rc = CURLE_OPERATION_TIMEDOUT; - } - else - rc = CURLE_OPERATION_TIMEDOUT; - } - - Curl_destroy_thread_data(&conn->async); - - if(!conn->async.dns) - conn->bits.close = TRUE; - - return (rc); -} - -/* - * Curl_is_resolved() is called repeatedly to check if a previous name resolve - * request has completed. It should also make sure to time-out if the - * operation seems to take too long. - */ -CURLcode Curl_is_resolved(struct connectdata *conn, - struct Curl_dns_entry **entry) -{ - *entry = NULL; - - if (conn->async.done) { - /* we're done */ - Curl_destroy_thread_data(&conn->async); - if (!conn->async.dns) { - TRACE(("Curl_is_resolved(): CURLE_COULDNT_RESOLVE_HOST\n")); - return CURLE_COULDNT_RESOLVE_HOST; - } - *entry = conn->async.dns; - TRACE(("resolved okay, dns %p\n", *entry)); - } - return CURLE_OK; -} - -int Curl_resolv_getsock(struct connectdata *conn, - curl_socket_t *socks, - int numsocks) -{ - const struct thread_data *td = - (const struct thread_data *) conn->async.os_specific; - - if (td && td->dummy_sock != CURL_SOCKET_BAD) { - if(numsocks) { - /* return one socket waiting for writable, even though this is just - a dummy */ - socks[0] = td->dummy_sock; - return GETSOCK_WRITESOCK(0); - } - } - return 0; -} - -#ifdef CURLRES_IPV4 -/* - * Curl_getaddrinfo() - for Windows threading without ENABLE_IPV6. - */ -Curl_addrinfo *Curl_getaddrinfo(struct connectdata *conn, - const char *hostname, - int port, - int *waitp) -{ - struct hostent *h = NULL; - struct SessionHandle *data = conn->data; - in_addr_t in; - - *waitp = 0; /* don't wait, we act synchronously */ - - in = inet_addr(hostname); - if (in != CURL_INADDR_NONE) - /* This is a dotted IP address 123.123.123.123-style */ - return Curl_ip2addr(in, hostname, port); - - /* fire up a new resolver thread! */ - if (init_resolve_thread(conn, hostname, port, NULL)) { - *waitp = TRUE; /* please wait for the response */ - return NULL; - } - - /* fall-back to blocking version */ - infof(data, "init_resolve_thread() failed for %s; %s\n", - hostname, Curl_strerror(conn,GetLastError())); - - h = gethostbyname(hostname); - if (!h) { - infof(data, "gethostbyname(2) failed for %s:%d; %s\n", - hostname, port, Curl_strerror(conn,WSAGetLastError())); - return NULL; - } - return Curl_he2ai(h, port); -} -#endif /* CURLRES_IPV4 */ - -#ifdef CURLRES_IPV6 -/* - * Curl_getaddrinfo() - for Windows threading IPv6 enabled - */ -Curl_addrinfo *Curl_getaddrinfo(struct connectdata *conn, - const char *hostname, - int port, - int *waitp) -{ - struct addrinfo hints, *res; - int error; - char sbuf[NI_MAXSERV]; - curl_socket_t s; - int pf; - struct SessionHandle *data = conn->data; - - *waitp = FALSE; /* default to synch response */ - - /* see if we have an IPv6 stack */ - s = socket(PF_INET6, SOCK_DGRAM, 0); - if (s == CURL_SOCKET_BAD) { - /* Some non-IPv6 stacks have been found to make very slow name resolves - * when PF_UNSPEC is used, so thus we switch to a mere PF_INET lookup if - * the stack seems to be a non-ipv6 one. */ - - pf = PF_INET; - } - else { - /* This seems to be an IPv6-capable stack, use PF_UNSPEC for the widest - * possible checks. And close the socket again. - */ - sclose(s); - - /* - * Check if a more limited name resolve has been requested. - */ - switch(data->set.ip_version) { - case CURL_IPRESOLVE_V4: - pf = PF_INET; - break; - case CURL_IPRESOLVE_V6: - pf = PF_INET6; - break; - default: - pf = PF_UNSPEC; - break; - } - } - - memset(&hints, 0, sizeof(hints)); - hints.ai_family = pf; - hints.ai_socktype = conn->socktype; -#if 0 /* removed nov 8 2005 before 7.15.1 */ - hints.ai_flags = AI_CANONNAME; -#endif - itoa(port, sbuf, 10); - - /* fire up a new resolver thread! */ - if (init_resolve_thread(conn, hostname, port, &hints)) { - *waitp = TRUE; /* please wait for the response */ - return NULL; - } - - /* fall-back to blocking version */ - infof(data, "init_resolve_thread() failed for %s; %s\n", - hostname, Curl_strerror(conn,GetLastError())); - - error = getaddrinfo(hostname, sbuf, &hints, &res); - if (error) { - infof(data, "getaddrinfo() failed for %s:%d; %s\n", - hostname, port, Curl_strerror(conn,WSAGetLastError())); - return NULL; - } - return res; -} -#endif /* CURLRES_IPV6 */ -#endif /* CURLRES_THREADED */ |