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asyn-thread: use GetAddrInfoExW on >= Windows 8

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For doing async DNS resolution instead of starting a thread for each
request.

Fixes #12481
Closes #12482
This commit is contained in:
Pavel P 2023-11-17 10:56:08 +02:00 • committed by Daniel Stenberg
parent a719be81e9
commit a6bbc87f9e
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GPG key ID: 5CC908FDB71E12C2
3 changed files with 276 additions and 1 deletions
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26
lib/system_win32.h
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@ -26,10 +26,11 @@
#include "curl_setup.h"
#if defined(_WIN32)
#ifdef _WIN32
extern LARGE_INTEGER Curl_freq;
extern bool Curl_isVistaOrGreater;
extern bool Curl_isWindows8OrGreater;
CURLcode Curl_win32_init(long flags);
void Curl_win32_cleanup(long init_flags);
@ -40,6 +41,29 @@ typedef unsigned int(WINAPI *IF_NAMETOINDEX_FN)(const char *);
/* This is used instead of if_nametoindex if available on Windows */
extern IF_NAMETOINDEX_FN Curl_if_nametoindex;
/* Identical copy of addrinfoexW/ADDRINFOEXW */
typedef struct addrinfoexW_
{
int ai_flags;
int ai_family;
int ai_socktype;
int ai_protocol;
size_t ai_addrlen;
PWSTR ai_canonname;
struct sockaddr *ai_addr;
void *ai_blob;
size_t ai_bloblen;
LPGUID ai_provider;
struct addrinfoexW_ *ai_next;
} ADDRINFOEXW_;
typedef void(CALLBACK *LOOKUP_COMPLETION)(DWORD, DWORD, LPWSAOVERLAPPED);
extern void(WSAAPI *Curl_FreeAddrInfoExW)(ADDRINFOEXW_*);
extern int(WSAAPI *Curl_GetAddrInfoExCancel)(LPHANDLE);
extern int(WSAAPI *Curl_GetAddrInfoExW)(PCWSTR, PCWSTR, DWORD, LPGUID,
const ADDRINFOEXW_*, ADDRINFOEXW_**, struct timeval*, LPOVERLAPPED,
LOOKUP_COMPLETION, LPHANDLE);
/* This is used to dynamically load DLLs */
HMODULE Curl_load_library(LPCTSTR filename);
#else /* _WIN32 */