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CURLOPT_PREREQDATA(3)               libcurl              CURLOPT_PREREQDATA(3)

NAME
       CURLOPT_PREREQDATA - pointer passed to the pre-request callback

SYNOPSIS
       #include <curl/curl.h>

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

DESCRIPTION
       Pass a pointer that will be untouched by libcurl and passed as the
       first argument in the pre-request callback set with
       CURLOPT_PREREQFUNCTION(3).

DEFAULT
       NULL

PROTOCOLS
       All

EXAMPLE
       static int prereq_callback(void *clientp,
                                  char *conn_primary_ip,
                                  char *conn_local_ip,
                                  int conn_primary_port,
                                  int conn_local_port)
       {
         printf("Connection made to %s:%s\n", conn_primary_ip, conn_primary_port);
         return CURL_PREREQFUNC_OK;
       }

       {
         struct data prereq_data;
         curl_easy_setopt(CURL *handle, CURLOPT_PREREQFUNCTION, prereq_callback);
         curl_easy_setopt(CURL *handle, CURLOPT_PREREQDATA, &prereq_data);
       }

AVAILABILITY
       Added in 7.80.0

RETURN VALUE
       Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION
       if not.

SEE ALSO
       CURLOPT_PREREQFUNCTION(3)

ibcurl 8.1.2                    April 26, 2023           CURLOPT_PREREQDATA(3)