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/*
* @(#) lifetime structure utilities
*
* Copyright (C) 2001 Richard Guy Briggs <rgb@freeswan.org>
* and Michael Richardson <mcr@freeswan.org>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* RCSID $Id: ipsec_life.c,v 1.3 2004/04/28 08:06:22 as Exp $
*
*/
/*
* This provides series of utility functions for dealing with lifetime
* structures.
*
* ipsec_check_lifetime - returns -1 hard lifetime exceeded
* 0 soft lifetime exceeded
* 1 everything is okay
* based upon whether or not the count exceeds hard/soft
*
*/
#define __NO_VERSION__
#include <linux/module.h>
#include <linux/config.h> /* for CONFIG_IP_FORWARD */
#include <linux/version.h>
#include <linux/kernel.h> /* printk() */
#include "freeswan/ipsec_param.h"
#include <linux/netdevice.h> /* struct device, struct net_device_stats and other headers */
#include <linux/etherdevice.h> /* eth_type_trans */
#include <linux/skbuff.h>
#include <freeswan.h>
#include "freeswan/radij.h"
#include "freeswan/ipsec_life.h"
#include "freeswan/ipsec_xform.h"
#include "freeswan/ipsec_eroute.h"
#include "freeswan/ipsec_encap.h"
#include "freeswan/ipsec_radij.h"
#include "freeswan/ipsec_sa.h"
#include "freeswan/ipsec_tunnel.h"
#include "freeswan/ipsec_ipe4.h"
#include "freeswan/ipsec_ah.h"
#include "freeswan/ipsec_esp.h"
#ifdef CONFIG_IPSEC_IPCOMP
#include "freeswan/ipcomp.h"
#endif /* CONFIG_IPSEC_IPCOMP */
#include <pfkeyv2.h>
#include <pfkey.h>
#include "freeswan/ipsec_proto.h"
enum ipsec_life_alive
ipsec_lifetime_check(struct ipsec_lifetime64 *il64,
const char *lifename,
const char *saname,
enum ipsec_life_type ilt,
enum ipsec_direction idir,
struct ipsec_sa *ips)
{
__u64 count;
const char *dir;
if(saname == NULL) {
saname = "unknown-SA";
}
if(idir == ipsec_incoming) {
dir = "incoming";
} else {
dir = "outgoing";
}
if(ilt == ipsec_life_timebased) {
count = jiffies/HZ - il64->ipl_count;
} else {
count = il64->ipl_count;
}
if(il64->ipl_hard &&
(count > il64->ipl_hard)) {
KLIPS_PRINT(debug_tunnel & DB_TN_XMIT,
"klips_debug:ipsec_lifetime_check: "
"hard %s lifetime of SA:<%s%s%s> %s has been reached, SA expired, "
"%s packet dropped.\n",
lifename,
IPS_XFORM_NAME(ips),
saname,
dir);
pfkey_expire(ips, 1);
return ipsec_life_harddied;
}
if(il64->ipl_soft &&
(count > il64->ipl_soft)) {
KLIPS_PRINT(debug_tunnel & DB_TN_XMIT,
"klips_debug:ipsec_lifetime_check: "
"soft %s lifetime of SA:<%s%s%s> %s has been reached, SA expiring, "
"soft expire message sent up, %s packet still processed.\n",
lifename,
IPS_XFORM_NAME(ips),
saname,
dir);
if(ips->ips_state != SADB_SASTATE_DYING) {
pfkey_expire(ips, 0);
}
ips->ips_state = SADB_SASTATE_DYING;
return ipsec_life_softdied;
}
return ipsec_life_okay;
}
/*
* This function takes a buffer (with length), a lifetime name and type,
* and formats a string to represent the current values of the lifetime.
*
* It returns the number of bytes that the format took (or would take,
* if the buffer were large enough: snprintf semantics).
* This is used in /proc routines and in debug output.
*/
int
ipsec_lifetime_format(char *buffer,
int buflen,
char *lifename,
enum ipsec_life_type timebaselife,
struct ipsec_lifetime64 *lifetime)
{
int len = 0;
__u64 count;
if(timebaselife == ipsec_life_timebased) {
count = jiffies/HZ - lifetime->ipl_count;
} else {
count = lifetime->ipl_count;
}
if(lifetime->ipl_count > 1 ||
lifetime->ipl_soft ||
lifetime->ipl_hard) {
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0))
len = ipsec_snprintf(buffer, buflen,
"%s(%Lu,%Lu,%Lu)",
lifename,
count,
lifetime->ipl_soft,
lifetime->ipl_hard);
#else /* XXX high 32 bits are not displayed */
len = ipsec_snprintf(buffer, buflen,
"%s(%lu,%lu,%lu)",
lifename,
(unsigned long)count,
(unsigned long)lifetime->ipl_soft,
(unsigned long)lifetime->ipl_hard);
#endif
}
return len;
}
void
ipsec_lifetime_update_hard(struct ipsec_lifetime64 *lifetime,
__u64 newvalue)
{
if(newvalue &&
(!lifetime->ipl_hard ||
(newvalue < lifetime->ipl_hard))) {
lifetime->ipl_hard = newvalue;
if(!lifetime->ipl_soft &&
(lifetime->ipl_hard < lifetime->ipl_soft)) {
lifetime->ipl_soft = lifetime->ipl_hard;
}
}
}
void
ipsec_lifetime_update_soft(struct ipsec_lifetime64 *lifetime,
__u64 newvalue)
{
if(newvalue &&
(!lifetime->ipl_soft ||
(newvalue < lifetime->ipl_soft))) {
lifetime->ipl_soft = newvalue;
if(lifetime->ipl_hard &&
(lifetime->ipl_hard < lifetime->ipl_soft)) {
lifetime->ipl_soft = lifetime->ipl_hard;
}
}
}
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