CURLOPT_ADDRESS_SCOPE(3) Library Functions Manual 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.

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All

#include <net/if.h> /* for if_nametoindex() */
int main(void)
{
  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_DEBUGFUNCTION(3), CURLOPT_STDERR(3)

2024-05-22 libcurl