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CURLINFO_LASTSOCKET(3)              libcurl             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 If the socket is no longer valid, -1 is returned.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() as
       usual and let libcurl close the socket and cleanup other resources
       associated 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

       All


EXAMPLE

       CURL *curl = curl_easy_init();
       if(curl) {
         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);

         /* Extract the socket from the curl handle */
         res = curl_easy_getinfo(curl, CURLINFO_LASTSOCKET, &sockfd);

         if(res != CURLE_OK) {
           printf("Error: %s\n", curl_easy_strerror(res));
           return 1;
         }
       }


AVAILABILITY

       Added in 7.15.2


RETURN VALUE

       Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION
       if not.


SEE ALSO

       curl_easy_getinfo(3), curl_easy_setopt(3),  CURLINFO_ACTIVESOCKET(3),

ibcurl 8.1.2                    April 26, 2023          CURLINFO_LASTSOCKET(3)

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