Provided by: libcurl4-doc_8.9.1-2ubuntu2.1_all
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)