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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_SOCKOPTFUNC-
       TION(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, "http://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
       CURLOPT_SOCKOPTFUNCTION(3), CURLOPT_OPENSOCKETFUNCTION(3),

libcurl	7.54.1			 May 15, 2017		CURLOPT_SOCKOPTDATA(3)

NAME | SYNOPSIS | DESCRIPTION | DEFAULT | PROTOCOLS | EXAMPLE | AVAILABILITY | RETURN VALUE | SEE ALSO

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