87 lines
1.8 KiB
Markdown
87 lines
1.8 KiB
Markdown
|
---
|
||
|
|
c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
|
||
|
|
SPDX-License-Identifier: curl
|
||
|
|
Title: CURLOPT_CLOSESOCKETFUNCTION
|
||
|
|
Section: 3
|
||
|
|
Source: libcurl
|
||
|
|
See-also:
|
||
|
|
- CURLOPT_CLOSESOCKETDATA (3)
|
||
|
|
- CURLOPT_OPENSOCKETFUNCTION (3)
|
||
|
|
---
|
||
|
|
|
||
|
|
# NAME
|
||
|
|
|
||
|
|
CURLOPT_CLOSESOCKETFUNCTION - callback to socket close replacement
|
||
|
|
|
||
|
|
# SYNOPSIS
|
||
|
|
|
||
|
|
~~~c
|
||
|
|
#include <curl/curl.h>
|
||
|
|
|
||
|
|
int closesocket_callback(void *clientp, curl_socket_t item);
|
||
|
|
|
||
|
|
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_CLOSESOCKETFUNCTION,
|
||
|
|
closesocket_callback);
|
||
|
|
~~~
|
||
|
|
|
||
|
|
# DESCRIPTION
|
||
|
|
|
||
|
|
Pass a pointer to your callback function, which should match the prototype
|
||
|
|
shown above.
|
||
|
|
|
||
|
|
This callback function gets called by libcurl instead of the *close(3)* or
|
||
|
|
*closesocket(3)* call when sockets are closed (not for any other file
|
||
|
|
descriptors). This is pretty much the reverse to the
|
||
|
|
CURLOPT_OPENSOCKETFUNCTION(3) option. Return 0 to signal success and 1
|
||
|
|
if there was an error.
|
||
|
|
|
||
|
|
The *clientp* pointer is set with
|
||
|
|
CURLOPT_CLOSESOCKETDATA(3). *item* is the socket libcurl wants to be
|
||
|
|
closed.
|
||
|
|
|
||
|
|
# DEFAULT
|
||
|
|
|
||
|
|
By default libcurl uses the standard socket close function.
|
||
|
|
|
||
|
|
# PROTOCOLS
|
||
|
|
|
||
|
|
All
|
||
|
|
|
||
|
|
# EXAMPLE
|
||
|
|
|
||
|
|
~~~c
|
||
|
|
struct priv {
|
||
|
|
void *custom;
|
||
|
|
};
|
||
|
|
|
||
|
|
static int closesocket(void *clientp, curl_socket_t item)
|
||
|
|
{
|
||
|
|
struct priv *my = clientp;
|
||
|
|
printf("our ptr: %p\n", my->custom);
|
||
|
|
|
||
|
|
printf("libcurl wants to close %d now\n", (int)item);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
int main(void)
|
||
|
|
{
|
||
|
|
struct priv myown;
|
||
|
|
CURL *curl = curl_easy_init();
|
||
|
|
|
||
|
|
/* call this function to close sockets */
|
||
|
|
curl_easy_setopt(curl, CURLOPT_CLOSESOCKETFUNCTION, closesocket);
|
||
|
|
curl_easy_setopt(curl, CURLOPT_CLOSESOCKETDATA, &myown);
|
||
|
|
|
||
|
|
curl_easy_perform(curl);
|
||
|
|
curl_easy_cleanup(curl);
|
||
|
|
}
|
||
|
|
~~~
|
||
|
|
|
||
|
|
# AVAILABILITY
|
||
|
|
|
||
|
|
Added in 7.21.7
|
||
|
|
|
||
|
|
# RETURN VALUE
|
||
|
|
|
||
|
|
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
|