NAME¶

CURLOPT_RESOLVER_START_DATA - custom pointer passed to the resolver start callback

SYNOPSIS¶

#include <curl/curl.h>

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_RESOLVER_START_DATA, void *pointer);

DESCRIPTION¶

Pass a pointer that will be untouched by libcurl and passed as the third argument in the resolver start callback set with CURLOPT_RESOLVER_START_FUNCTION(3).

DEFAULT¶

NULL

PROTOCOLS¶

All

EXAMPLE¶

static int resolver_start_cb(void *resolver_state, void *reserved,


                             void *userdata)
{


  (void)reserved;


  printf("Received resolver_state=%p userdata=%p\n",


         resolver_state, userdata);


  return 0;
}
CURL *curl = curl_easy_init();
if(curl) {


  curl_easy_setopt(curl, CURLOPT_RESOLVER_START_FUNCTION, resolver_start_cb);


  curl_easy_setopt(curl, CURLOPT_RESOLVER_START_DATA, curl);


  curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");


  curl_easy_perform(curl);


  curl_easy_cleanup(curl);
}

AVAILABILITY¶

Added in 7.59.0

RETURN VALUE¶

Returns CURLE_OK

SEE ALSO¶

CURLOPT_RESOLVER_START_FUNCTION(3)