CURLOPT_SOCKOPTDATA(3) Library Functions Manual CURLOPT_SOCKOPTDATA(3)
NAME
CURLOPT_SOCKOPTDATA - pointer to pass to sockopt callback
SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SOCKOPTDATA, void *pointer);
DESCRIPTION
Pass a pointer that is untouched by libcurl and passed as the first
argument in the sockopt callback set with CURLOPT_SOCKOPTFUNCTION(3).
DEFAULT
NULL
PROTOCOLS
This functionality affects all supported protocols
EXAMPLE
static int sockopt_callback(void *clientp, curl_socket_t curlfd,
curlsocktype purpose)
{
int val = *(int *)clientp;
setsockopt((int)curlfd, SOL_SOCKET, SO_RCVBUF,
(const char *)&val, sizeof(val));
return CURL_SOCKOPT_OK;
}
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
int recvbuffersize = 256 * 1024;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
/* call this function to set options for the socket */
curl_easy_setopt(curl, CURLOPT_SOCKOPTFUNCTION, sockopt_callback);
curl_easy_setopt(curl, CURLOPT_SOCKOPTDATA, &recvbuffersize);
res = curl_easy_perform(curl);
curl_easy_cleanup(curl);
}
}
AVAILABILITY
Added in curl 7.16.0
RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION
if not.
SEE ALSO
CURLOPT_OPENSOCKETFUNCTION(3), CURLOPT_SOCKOPTFUNCTION(3)
libcurl 2024-08-05 CURLOPT_SOCKOPTDATA(3)
curl 8.9.1 - Generated Wed Aug 7 11:15:00 CDT 2024