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asyn-thread: avoid using GetAddrInfoExW with impersonation

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Multiple reports suggest that GetAddrInfoExW fails when impersonation is
used. This PR checks if thread is impersonating and avoids using
GetAddrInfoExW api.

Reported-by: Keerthi Timmaraju
Assisted-by: edmcln on github
Fixes #13612
Closes #13738
This commit is contained in:
Pavel P 2024-05-22 01:23:34 +02:00 • committed by Daniel Stenberg
parent 30de937bda
commit 0caadc1f24
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3 changed files with 14 additions and 1 deletions
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lib/asyn-thread.c
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@ -638,7 +638,8 @@ static bool init_resolve_thread(struct Curl_easy *data,
#ifdef _WIN32
if(Curl_isWindows8OrGreater && Curl_FreeAddrInfoExW &&
Curl_GetAddrInfoExCancel && Curl_GetAddrInfoExW) {
Curl_GetAddrInfoExCancel && Curl_GetAddrInfoExW &&
!Curl_win32_impersonating()) {
#define MAX_NAME_LEN 256 /* max domain name is 253 chars */
#define MAX_PORT_LEN 8
WCHAR namebuf[MAX_NAME_LEN];