table of contents
CURLOPT_SOCKOPTDATA(3) | curl_easy_setopt options | CURLOPT_SOCKOPTDATA(3) |
NAME¶
CURLOPT_SOCKOPTDATA - custom 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 will be untouched by libcurl and passed as the first argument in the sockopt callback set with CURLOPT_SOCKOPTFUNCTION(3).
DEFAULT¶
The default value of this parameter is NULL.
PROTOCOLS¶
All
EXAMPLE¶
static int sockopt_callback(void *clientp, curl_socket_t curlfd,
curlsocktype purpose) {
int val = *(int *)clientp;
setsockopt(curldfd, SOL_SOCKET, SO_RCVBUF, (const char *)&val, sizeof(val));
return CURL_SOCKOPT_OK; } curl = curl_easy_init(); if(curl) {
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 7.16.0
RETURN VALUE¶
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
SEE ALSO¶
November 4, 2020 | libcurl 7.76.1 |