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CURLINFO_LASTSOCKET(3)	   Library Functions Manual	CURLINFO_LASTSOCKET(3)

NAME
       CURLINFO_LASTSOCKET - get the last socket used

SYNOPSIS
       #include	<curl/curl.h>

       CURLcode	curl_easy_getinfo(CURL *handle,	CURLINFO_LASTSOCKET, long *socket);

DESCRIPTION
       Deprecated since	7.45.0.	Use CURLINFO_ACTIVESOCKET(3) instead.

       Pass  a	pointer	to a long to receive the last socket used by this curl
       session.	If the socket is no longer valid, -1  is  returned.  When  you
       finish  working	with the socket, you must call curl_easy_cleanup(3) as
       usual and let libcurl close the socket and cleanup other	resources  as-
       sociated	 with  the  handle. This is typically used in combination with
       CURLOPT_CONNECT_ONLY(3).

       NOTE: this API is deprecated since it is	not working on win64 where the
       SOCKET type is 64 bits large while its  'long'  is  32  bits.  Use  the
       CURLINFO_ACTIVESOCKET(3)	instead, if possible.

PROTOCOLS
       This functionality affects all supported	protocols

EXAMPLE
       int main(void)
       {
	 CURL *curl = curl_easy_init();
	 if(curl) {
	   CURLcode res;
	   long	sockfd;	/* does	not work on win64 */
	   curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");

	   /* Do not do	the transfer - only connect to host */
	   curl_easy_setopt(curl, CURLOPT_CONNECT_ONLY,	1L);
	   res = curl_easy_perform(curl);
	   if(res != CURLE_OK) {
	     printf("Error: %s\n", curl_easy_strerror(res));
	     curl_easy_cleanup(curl);
	     return 1;
	   }

	   /* Extract the socket from the curl handle */
	   res = curl_easy_getinfo(curl, CURLINFO_LASTSOCKET, &sockfd);
	   if(!res && sockfd !=	-1) {
	     /*	operate	on sockfd */
	   }

	   curl_easy_cleanup(curl);
	 }
       }

AVAILABILITY
       Added in	curl 7.15.2

RETURN VALUE
       curl_easy_getinfo(3) returns a CURLcode indicating success or error.

       CURLE_OK	(0) means everything was OK, non-zero means an error occurred,
       see libcurl-errors(3).

SEE ALSO
       CURLINFO_ACTIVESOCKET(3),    CURLOPT_CONNECT_ONLY(3),	curl_easy_get-
       info(3),	curl_easy_setopt(3)

libcurl				  2025-06-03		CURLINFO_LASTSOCKET(3)

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