Manpages - CURLOPT_ADDRESS_SCOPE.3

CURLOPT_ADDRESS_SCOPE - scope id for IPv6 addresses

#include <curl/curl.h>

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_ADDRESS_SCOPE, long scope);

Pass a long specifying the scope id value to use when connecting to IPv6 addresses.

0

All, when using IPv6

  CURL *curl = curl_easy_init();
  if(curl) {
    CURLcode ret;
    long my_scope_id;
    curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
    my_scope_id = if_nametoindex("eth0");
    curl_easy_setopt(curl, CURLOPT_ADDRESS_SCOPE, my_scope_id);
    ret = curl_easy_perform(curl);
    curl_easy_cleanup(curl);
  }

Added in 7.19.0

Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not. Returns CURLE_BAD_FUNCTION_ARGUMENT if set to a negative value.

*CURLOPT_STDERR*(3), *CURLOPT_DEBUGFUNCTION*(3),