auth_delay.c File Reference

#include "postgres.h"
#include <limits.h>
#include "libpq/auth.h"
#include "utils/guc.h"

Include dependency graph for auth_delay.c:

Go to the source code of this file.

Functions
	PG_MODULE_MAGIC_EXT (.name="auth_delay",.version=PG_VERSION)
static void	auth_delay_checks (Port *port, int status)
void	_PG_init (void)

Variables
static int	auth_delay_milliseconds = 0
static ClientAuthentication_hook_type	original_client_auth_hook = NULL

Function Documentation

_PG_init()

void _PG_init

(

void

)

Definition at line 55 of file auth_delay.c.

{
    /* Define custom GUC variables */
    DefineCustomIntVariable("auth_delay.milliseconds",
                            "Milliseconds to delay before reporting authentication failure",
                            NULL,
                            &auth_delay_milliseconds,
                            0,
                            0, INT_MAX / 1000,
                            PGC_SIGHUP,
                            GUC_UNIT_MS,
                            NULL,
                            NULL,
                            NULL);
 
    MarkGUCPrefixReserved("auth_delay");
 
    /* Install Hooks */
    original_client_auth_hook = ClientAuthentication_hook;
    ClientAuthentication_hook = auth_delay_checks;
}

References auth_delay_checks(), auth_delay_milliseconds, ClientAuthentication_hook, DefineCustomIntVariable(), GUC_UNIT_MS, MarkGUCPrefixReserved(), original_client_auth_hook, and PGC_SIGHUP.

auth_delay_checks()

static void auth_delay_checks ( Port *  port, int  status  )

static

Definition at line 34 of file auth_delay.c.

{
    /*
     * Any other plugins which use ClientAuthentication_hook.
     */
    if (original_client_auth_hook)
        original_client_auth_hook(port, status);
 
    /*
     * Inject a short delay if authentication failed.
     */
    if (status != STATUS_OK)
    {
        pg_usleep(1000L * auth_delay_milliseconds);
    }
}

References auth_delay_milliseconds, original_client_auth_hook, pg_usleep(), port, and STATUS_OK.

Referenced by _PG_init().

PG_MODULE_MAGIC_EXT()

PG_MODULE_MAGIC_EXT	(	.	name = "auth_delay",
		.	version = PG_VERSION
	)

Variable Documentation

auth_delay_milliseconds

int auth_delay_milliseconds = 0

static

Definition at line 25 of file auth_delay.c.

Referenced by _PG_init(), and auth_delay_checks().

original_client_auth_hook

ClientAuthentication_hook_type original_client_auth_hook = NULL

static

Definition at line 28 of file auth_delay.c.

Referenced by _PG_init(), and auth_delay_checks().