CURLOPT_SOCKOPTDATA - Online Linux Manual Page
Section : 3
Updated : November 26, 2021
Source : libcurl 7.82.0
Note : curl_easy_setopt options
NAMECURLOPT_SOCKOPTDATA − pointer to pass to sockopt callback
SYNOPSIS#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SOCKOPTDATA, void *pointer);
DESCRIPTIONPass a pointer that will be untouched by libcurl and passed as the first argument in the sockopt callback set with CURLOPT_SOCKOPTFUNCTION(3).
DEFAULTThe default value of this parameter is NULL.
PROTOCOLSAll
EXAMPLEstatic 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);
}
AVAILABILITYAdded in 7.16.0
RETURN VALUEReturns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
SEE ALSOCURLOPT_SOCKOPTFUNCTION(3), CURLOPT_OPENSOCKETFUNCTION (3)," 0
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