plucky (3) CURLINFO_LASTSOCKET.3.gz

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 If the socket is no longer
       valid, -1 is returned.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 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

       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_getinfo(3), curl_easy_setopt(3)