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 If the socket is no longer valid, -1 is returned.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(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
All
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);
/* 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),
CURLOPT_CONNECT_ONLY(3)
ibcurl 8.5.0 December 4, 2023 CURLINFO_LASTSOCKET(3)
curl 8.5.0 - Generated Sat Dec 16 10:01:25 CST 2023