NAME

       CURLINFO_ACTIVESOCKET - get the active socket

SYNOPSIS

       #include <curl/curl.h>

       CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_ACTIVESOCKET,
                                  curl_socket_t *socket);

DESCRIPTION

       Pass  a pointer to a curl_socket_t to receive the most recently active socket used for the
       transfer  connection  by  this  curl  session.  If  the  socket  is   no   longer   valid,
       CURL_SOCKET_BAD  is returned. When you are finished working with the socket, you must call
       curl_easy_cleanup(3) as usual on the easy handle and let  libcurl  close  the  socket  and
       cleanup  other resources associated with the handle. This option returns the active socket
       only  after  the  transfer  is  complete,  and  is  typically  used  in  combination  with
       CURLOPT_CONNECT_ONLY(3), which skips the transfer phase.

       CURLINFO_ACTIVESOCKET(3)  was added as a replacement for CURLINFO_LASTSOCKET(3) since that
       one is not working on all platforms.

PROTOCOLS

       This functionality affects all supported protocols

EXAMPLE

       int main(void)
       {
         CURL *curl = curl_easy_init();
         if(curl) {
           CURLcode res;
           curl_socket_t sockfd;
           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_ACTIVESOCKET, &sockfd);
           if(!res && sockfd != CURL_SOCKET_BAD) {
             /* operate on sockfd */
           }

           curl_easy_cleanup(curl);
         }
       }

AVAILABILITY

       Added in curl 7.45.0

RETURN VALUE

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

SEE ALSO

       CURLINFO_LASTSOCKET(3), CURLOPT_CONNECT_ONLY(3), curl_easy_getinfo(3), curl_easy_setopt(3)