docs/libcurl/opts/CURLOPT_ADDRESS_SCOPE.3

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.TH CURLOPT_ADDRESS_SCOPE 3 "March 07, 2019" "libcurl 7.66.0" "curl_easy_setopt options"

.SH NAME
CURLOPT_ADDRESS_SCOPE \- set scope id for IPv6 addresses
.SH SYNOPSIS
#include <curl/curl.h>

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_ADDRESS_SCOPE, long scope);
.SH DESCRIPTION
Pass a long specifying the scope id value to use when connecting to IPv6 addresses.
.SH DEFAULT
0
.SH PROTOCOLS
All, when using IPv6
.SH EXAMPLE
.nf
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);
}
.fi
.SH AVAILABILITY
Added in 7.19.0
.SH RETURN VALUE
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.
.SH "SEE ALSO"
.BR CURLOPT_STDERR "(3), " CURLOPT_DEBUGFUNCTION "(3), "