setting

• curl version
  • v7.39.0 , v7.40.0
• device
  • iPhone 5s , ios 9.1
• Xcode version
  • 6.4
• wifi
  • Mac OS X El Capitan shared wifi (NAT64)

error

• CURLE_COULDNT_CONNECT (7)

state

• version info data
  • curl_version_info_data->features (573980) ,CURL_VERSION_IPV6 == false.
• CURLOPT_IPRESOLVE
  • default (CURL_IPRESOLVE_WHATEVER)
• url
  • ipv6 able (other ios native api use test)

question

• how to solve this..