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CURLINFO_ACTIVESOCKET

Section: curl_easy_getinfo options (3)
Updated: May 06, 2017
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NAME

CURLINFO_ACTIVESOCKET - get the active socket

SYNOPSIS

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

DESCRIPTION

Pass a pointer to a curl_socket_t to receive the active socket used by this curl session. If the socket is no longer valid, CURL_SOCKET_BAD is returned. When you finish 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 is typically used in combination with CURLOPT_CONNECT_ONLY(3).

This option was added as a replacement for CURLINFO_LASTSOCKET(3) since that one isn't working on all platforms.

PROTOCOLS

All

EXAMPLE

CURL *curl = curl_easy_init();
if(curl) {
  curl_socket_t sockfd;
  curl_easy_setopt(curl, CURLOPT_URL, "http://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_ACTIVESOCKET, &sockfd);

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

AVAILABILITY

Added in 7.45.0

RETURN VALUE

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