"Daniel Stenberg" <daniel_at_haxx.se> wrote:

> On Thu, 22 Sep 2011, Gisle Vanem wrote:
>
>> But I cannot make sense of the messy #ifdef-ing to select the "correct"
>> resolver. We have been told for like 10 years that gethostbyname() has been
>> deprecated. At least on Windows. So someone help me fix this.
>
> It currently depends on ENABLE_IPV6, which in lib/setup.h (line 495) will
> define CURLRES_IPV6 then.
>
> Does lwIP support IPv6? Otherwise I guess you can leave ENABLE_IPV6 undefined
> and just explicity define CURLRES_IPV6 and undefine CURLRES_IPV4,

It does. Trying that, I see lwIP uses getaddrinfo(), then calls gethostbyname()
internally and then hangs forever waiting for some event:

...
kernel32.dll!WaitForSingleObjectEx+0xa8
kernel32.dll!WaitForSingleObject+0x12
lwip.dll!sys_arch_sem_wait+0xbb
lwip.dll!netconn_gethostbyname+0xb6
lwip.dll!lwip_gethostbyname+0x11
libcurl.dll!Curl_getaddrinfo+0x43
libcurl.dll!Curl_resolv+0xd1
libcurl.dll!Curl_resolv_timeout+0x44
libcurl.dll!resolve_server+0x12d
libcurl.dll!create_conn+0x4ea
libcurl.dll!Curl_connect+0x1d
libcurl.dll!Curl_do_perform+0x5a
libcurl.dll!Curl_perform+0x17
libcurl.dll!curl_easy_perform+0xa0
curl.exe!operate+0x2468
...

Must check further.

--gv
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Received on 2011-09-23