CURLOPT_PREREQDATA - Man Page
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
Referenced By
curl_easy_setopt(3), CURLOPT_PREREQFUNCTION(3).
May 17, 2022 libcurl 7.87.0 curl_easy_setopt options