- **labels**: dns --> dns, ipv6
- **assigned_to**: Daniel Stenberg
- **Comment**:

Thanks for your report. Can you please try 7.37.1 as well and just see how it behaves and then we can work from there?

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** [bugs:#1410] Potential problem with CURLOPT_IPRESOLVE on libcurl v. 7.34.0**
**Status:** open
**Labels:** dns ipv6 
**Created:** Tue Aug 12, 2014 03:05 PM UTC by sergico
**Last Updated:** Tue Aug 12, 2014 03:05 PM UTC
**Owner:** Daniel Stenberg
OS: GNU/Linux Ubuntu 12.04 64bit
libcurl v. 7.34.0 
I compiled the lib myself as Ubuntu 12.04 distributes version 7.22.0 
**Compile option:**
./configure --enable-optimize --enable-warnings --disable-ares --enable-shared --enable-static=no --enable-http --enable-ftp --disable-ldap --disable-ldaps --disable-rtsp --enable-proxy --disable-dict --disable-telnet --disable-tftp --enable-pop3 --enable-imap --enable-smtp --disable-gopher **--disable-ipv6** --enable-threaded-resolver --enable-verbose --disable-sspi --enable-crypto-auth --disable-ntlm-wb --disable-tls-srp --enable-cookies --disable-soname-bump --without-librtmp
**Linking my app to libcurl 7.34.0:**
- libcurl is sending AAAA query even though the ipv6 stack is supposed to be disabled
- I disabled in my code the ipv6 resolver with the following piece of code:
curl_easy_setopt( m_curlHndlPtr, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_V4 );
but I still see the AAAA query in the .pcap traces when curl resolves host names
** Linking my app to libcurl 7.22.0:**
- libcurl sends only A query 
I did some other test to be reasonably sure the problem is not in my code:
- forced curl binary to load the libcurl I compiled using LD_LIBRARY_PATH
curl: /opt/agent/lib/libcurl.so.4: no version information available (required by curl)
curl 7.22.0 (x86_64-pc-linux-gnu) **libcurl/7.34.0** OpenSSL/1.0.1 zlib/1.2.3.4 libidn/1.23
Protocols: file ftp ftps http https imap imaps pop3 pop3s smtp smtps 
Features: AsynchDNS IDN Largefile NTLM SSL libz 
curl 7.22.0 (x86_64-pc-linux-gnu) **libcurl/7.22.0** OpenSSL/1.0.1 zlib/1.2.3.4 libidn/1.23 librtmp/2.3
Protocols: dict file ftp ftps gopher http https imap imaps ldap pop3 pop3s rtmp rtsp smtp smtps telnet tftp 
Features: GSS-Negotiate IDN IPv6 Largefile NTLM NTLM_WB SSL libz TLS-SRP
- Tried resolved an host name using the -4 option
-- when linking libcurl 7.34.0 I still see the AAAA query 
-- when linking libcurl 7.22.0 I correctly see only the A query
Please let me know if you need further details 
Best Regards
Sergio
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