805 lines
17 KiB
C
805 lines
17 KiB
C
/* $NetBSD$ */
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/*
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* Copyright (C) 1998-2003 by Darren Reed & Guido van Rooij.
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*
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* See the IPFILTER.LICENCE file for details on licencing.
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*/
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#if defined(KERNEL) || defined(_KERNEL)
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# undef KERNEL
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# undef _KERNEL
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# define KERNEL 1
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# define _KERNEL 1
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#endif
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#include <sys/errno.h>
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/time.h>
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#include <sys/file.h>
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#if !defined(_KERNEL)
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# include <stdio.h>
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# include <stdlib.h>
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# include <string.h>
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# define _KERNEL
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# ifdef __OpenBSD__
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struct file;
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# endif
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# include <sys/uio.h>
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# undef _KERNEL
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#endif
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#if defined(_KERNEL) && (__FreeBSD_version >= 220000)
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# include <sys/filio.h>
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# include <sys/fcntl.h>
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#else
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# include <sys/ioctl.h>
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#endif
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#if !defined(linux)
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# include <sys/protosw.h>
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#endif
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#include <sys/socket.h>
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#if defined(_KERNEL)
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# include <sys/systm.h>
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# if !defined(__SVR4) && !defined(__svr4__) && !defined(linux)
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# include <sys/mbuf.h>
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# endif
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#endif
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#if defined(__SVR4) || defined(__svr4__)
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# include <sys/filio.h>
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# include <sys/byteorder.h>
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# ifdef _KERNEL
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# include <sys/dditypes.h>
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# endif
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# include <sys/stream.h>
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# include <sys/kmem.h>
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#endif
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#if (_BSDI_VERSION >= 199802) || (__FreeBSD_version >= 400000)
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# include <sys/queue.h>
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#endif
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#if defined(__NetBSD__) || defined(__OpenBSD__) || defined(bsdi)
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# include <machine/cpu.h>
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#endif
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#if defined(_KERNEL) && defined(__NetBSD__) && (__NetBSD_Version__ >= 104000000)
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# include <sys/proc.h>
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#endif
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#include <net/if.h>
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#ifdef sun
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# include <net/af.h>
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#endif
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#include <net/route.h>
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#include <netinet/in.h>
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#include <netinet/in_systm.h>
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#include <netinet/ip.h>
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#if !defined(_KERNEL) && !defined(__osf__) && !defined(__sgi)
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# define KERNEL
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# define _KERNEL
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# define NOT_KERNEL
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#endif
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#if !defined(linux)
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# include <netinet/ip_var.h>
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#endif
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#ifdef NOT_KERNEL
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# undef _KERNEL
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# undef KERNEL
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#endif
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#include <netinet/tcp.h>
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#if defined(IRIX) && (IRIX < 60516) /* IRIX < 6 */
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extern struct ifqueue ipintrq; /* ip packet input queue */
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#else
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# if !defined(__hpux) && !defined(linux)
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# if __FreeBSD_version >= 300000
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# include <net/if_var.h>
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# if __FreeBSD_version >= 500042
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# define IF_QFULL _IF_QFULL
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# define IF_DROP _IF_DROP
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# endif /* __FreeBSD_version >= 500042 */
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# endif
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# include <netinet/in_var.h>
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# include <netinet/tcp_fsm.h>
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# endif
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#endif
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#include <netinet/udp.h>
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#include <netinet/ip_icmp.h>
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#include "netinet/ip_compat.h"
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#include <netinet/tcpip.h>
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#include "netinet/ip_fil.h"
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#include "netinet/ip_auth.h"
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#if !defined(MENTAT) && !defined(linux)
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# include <net/netisr.h>
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# ifdef __FreeBSD__
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# include <machine/cpufunc.h>
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# endif
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#endif
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#if (__FreeBSD_version >= 300000)
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# include <sys/malloc.h>
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# if defined(_KERNEL) && !defined(IPFILTER_LKM)
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# include <sys/libkern.h>
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# include <sys/systm.h>
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# endif
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#endif
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/* END OF INCLUDES */
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#if !defined(lint)
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static const char rcsid[] = "@(#)Id: ip_auth.c,v 2.73.2.3 2004/08/26 11:25:21 darrenr Exp";
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#endif
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#if SOLARIS
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extern kcondvar_t ipfauthwait;
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#endif /* SOLARIS */
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#if defined(linux) && defined(_KERNEL)
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wait_queue_head_t fr_authnext_linux;
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#endif
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int fr_authsize = FR_NUMAUTH;
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int fr_authused = 0;
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int fr_defaultauthage = 600;
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int fr_auth_lock = 0;
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int fr_auth_init = 0;
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fr_authstat_t fr_authstats;
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static frauth_t *fr_auth = NULL;
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mb_t **fr_authpkts = NULL;
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int fr_authstart = 0, fr_authend = 0, fr_authnext = 0;
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frauthent_t *fae_list = NULL;
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frentry_t *ipauth = NULL,
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*fr_authlist = NULL;
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int fr_authinit()
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{
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KMALLOCS(fr_auth, frauth_t *, fr_authsize * sizeof(*fr_auth));
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if (fr_auth != NULL)
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bzero((char *)fr_auth, fr_authsize * sizeof(*fr_auth));
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else
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return -1;
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KMALLOCS(fr_authpkts, mb_t **, fr_authsize * sizeof(*fr_authpkts));
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if (fr_authpkts != NULL)
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bzero((char *)fr_authpkts, fr_authsize * sizeof(*fr_authpkts));
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else
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return -2;
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MUTEX_INIT(&ipf_authmx, "ipf auth log mutex");
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RWLOCK_INIT(&ipf_auth, "ipf IP User-Auth rwlock");
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#if SOLARIS && defined(_KERNEL)
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cv_init(&ipfauthwait, "ipf auth condvar", CV_DRIVER, NULL);
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#endif
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#if defined(linux) && defined(_KERNEL)
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init_waitqueue_head(&fr_authnext_linux);
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#endif
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fr_auth_init = 1;
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return 0;
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}
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/*
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* Check if a packet has authorization. If the packet is found to match an
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* authorization result and that would result in a feedback loop (i.e. it
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* will end up returning FR_AUTH) then return FR_BLOCK instead.
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*/
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frentry_t *fr_checkauth(fin, passp)
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fr_info_t *fin;
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u_32_t *passp;
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{
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frentry_t *fr;
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frauth_t *fra;
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u_32_t pass;
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u_short id;
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ip_t *ip;
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int i;
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if (fr_auth_lock || !fr_authused)
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return NULL;
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ip = fin->fin_ip;
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id = ip->ip_id;
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READ_ENTER(&ipf_auth);
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for (i = fr_authstart; i != fr_authend; ) {
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/*
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* index becomes -2 only after an SIOCAUTHW. Check this in
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* case the same packet gets sent again and it hasn't yet been
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* auth'd.
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*/
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fra = fr_auth + i;
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if ((fra->fra_index == -2) && (id == fra->fra_info.fin_id) &&
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!bcmp((char *)fin, (char *)&fra->fra_info, FI_CSIZE)) {
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/*
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* Avoid feedback loop.
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*/
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if (!(pass = fra->fra_pass) || (FR_ISAUTH(pass)))
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pass = FR_BLOCK;
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/*
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* Create a dummy rule for the stateful checking to
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* use and return. Zero out any values we don't
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* trust from userland!
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*/
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if ((pass & FR_KEEPSTATE) || ((pass & FR_KEEPFRAG) &&
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(fin->fin_flx & FI_FRAG))) {
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KMALLOC(fr, frentry_t *);
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if (fr) {
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bcopy((char *)fra->fra_info.fin_fr,
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(char *)fr, sizeof(*fr));
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fr->fr_grp = NULL;
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fr->fr_ifa = fin->fin_ifp;
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fr->fr_func = NULL;
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fr->fr_ref = 1;
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fr->fr_flags = pass;
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fr->fr_ifas[1] = NULL;
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fr->fr_ifas[2] = NULL;
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fr->fr_ifas[3] = NULL;
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}
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} else
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fr = fra->fra_info.fin_fr;
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fin->fin_fr = fr;
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RWLOCK_EXIT(&ipf_auth);
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WRITE_ENTER(&ipf_auth);
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if ((fr != NULL) && (fr != fra->fra_info.fin_fr)) {
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fr->fr_next = fr_authlist;
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fr_authlist = fr;
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}
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fr_authstats.fas_hits++;
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fra->fra_index = -1;
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fr_authused--;
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if (i == fr_authstart) {
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while (fra->fra_index == -1) {
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i++;
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fra++;
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if (i == fr_authsize) {
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i = 0;
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fra = fr_auth;
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}
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fr_authstart = i;
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if (i == fr_authend)
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break;
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}
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if (fr_authstart == fr_authend) {
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fr_authnext = 0;
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fr_authstart = fr_authend = 0;
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}
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}
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RWLOCK_EXIT(&ipf_auth);
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if (passp != NULL)
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*passp = pass;
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ATOMIC_INC64(fr_authstats.fas_hits);
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return fr;
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}
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i++;
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if (i == fr_authsize)
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i = 0;
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}
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fr_authstats.fas_miss++;
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RWLOCK_EXIT(&ipf_auth);
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ATOMIC_INC64(fr_authstats.fas_miss);
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return NULL;
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}
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/*
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* Check if we have room in the auth array to hold details for another packet.
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* If we do, store it and wake up any user programs which are waiting to
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* hear about these events.
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*/
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int fr_newauth(m, fin)
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mb_t *m;
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fr_info_t *fin;
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{
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#if defined(_KERNEL) && defined(MENTAT)
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qpktinfo_t *qpi = fin->fin_qpi;
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#endif
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frauth_t *fra;
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#if !defined(sparc) && !defined(m68k)
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ip_t *ip;
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#endif
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int i;
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if (fr_auth_lock)
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return 0;
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WRITE_ENTER(&ipf_auth);
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if (fr_authstart > fr_authend) {
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fr_authstats.fas_nospace++;
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RWLOCK_EXIT(&ipf_auth);
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return 0;
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} else {
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if (fr_authused == fr_authsize) {
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fr_authstats.fas_nospace++;
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RWLOCK_EXIT(&ipf_auth);
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return 0;
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}
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}
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fr_authstats.fas_added++;
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fr_authused++;
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i = fr_authend++;
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if (fr_authend == fr_authsize)
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fr_authend = 0;
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RWLOCK_EXIT(&ipf_auth);
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fra = fr_auth + i;
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fra->fra_index = i;
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fra->fra_pass = 0;
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fra->fra_age = fr_defaultauthage;
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bcopy((char *)fin, (char *)&fra->fra_info, sizeof(*fin));
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#if !defined(sparc) && !defined(m68k)
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/*
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* No need to copyback here as we want to undo the changes, not keep
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* them.
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*/
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ip = fin->fin_ip;
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# if defined(MENTAT) && defined(_KERNEL)
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if ((ip == (ip_t *)m->b_rptr) && (fin->fin_v == 4))
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# endif
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{
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register u_short bo;
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bo = ip->ip_len;
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ip->ip_len = htons(bo);
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bo = ip->ip_off;
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ip->ip_off = htons(bo);
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}
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#endif
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#if SOLARIS && defined(_KERNEL)
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m->b_rptr -= qpi->qpi_off;
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fr_authpkts[i] = *(mblk_t **)fin->fin_mp;
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fra->fra_q = qpi->qpi_q; /* The queue can disappear! */
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cv_signal(&ipfauthwait);
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#else
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# if defined(BSD) && !defined(sparc) && (BSD >= 199306)
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if (!fin->fin_out) {
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ip->ip_len = htons(ip->ip_len);
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ip->ip_off = htons(ip->ip_off);
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}
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# endif
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fr_authpkts[i] = m;
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WAKEUP(&fr_authnext,0);
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#endif
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return 1;
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}
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int fr_auth_ioctl(data, cmd, mode)
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caddr_t data;
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ioctlcmd_t cmd;
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int mode;
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{
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mb_t *m;
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#if defined(_KERNEL) && !defined(MENTAT) && !defined(linux) && \
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(!defined(__FreeBSD_version) || (__FreeBSD_version < 501000))
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struct ifqueue *ifq;
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# ifdef USE_SPL
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int s;
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# endif /* USE_SPL */
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#endif
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frauth_t auth, *au = &auth, *fra;
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int i, error = 0, len;
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char *t;
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switch (cmd)
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{
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case SIOCSTLCK :
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if (!(mode & FWRITE)) {
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error = EPERM;
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break;
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}
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fr_lock(data, &fr_auth_lock);
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break;
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case SIOCATHST:
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fr_authstats.fas_faelist = fae_list;
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error = fr_outobj(data, &fr_authstats, IPFOBJ_AUTHSTAT);
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break;
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case SIOCIPFFL:
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SPL_NET(s);
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WRITE_ENTER(&ipf_auth);
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i = fr_authflush();
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RWLOCK_EXIT(&ipf_auth);
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SPL_X(s);
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error = copyoutptr((char *)&i, data, sizeof(i));
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break;
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case SIOCAUTHW:
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fr_authioctlloop:
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error = fr_inobj(data, au, IPFOBJ_FRAUTH);
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READ_ENTER(&ipf_auth);
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if ((fr_authnext != fr_authend) && fr_authpkts[fr_authnext]) {
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error = fr_outobj(data, &fr_auth[fr_authnext],
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IPFOBJ_FRAUTH);
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if (auth.fra_len != 0 && auth.fra_buf != NULL) {
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/*
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* Copy packet contents out to user space if
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* requested. Bail on an error.
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*/
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m = fr_authpkts[fr_authnext];
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len = MSGDSIZE(m);
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if (len > auth.fra_len)
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len = auth.fra_len;
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auth.fra_len = len;
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for (t = auth.fra_buf; m && (len > 0); ) {
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i = MIN(M_LEN(m), len);
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error = copyoutptr(MTOD(m, char *),
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t, i);
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len -= i;
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t += i;
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if (error != 0)
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break;
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}
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}
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RWLOCK_EXIT(&ipf_auth);
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if (error != 0)
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break;
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SPL_NET(s);
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WRITE_ENTER(&ipf_auth);
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fr_authnext++;
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if (fr_authnext == fr_authsize)
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fr_authnext = 0;
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RWLOCK_EXIT(&ipf_auth);
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SPL_X(s);
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return 0;
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}
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RWLOCK_EXIT(&ipf_auth);
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/*
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* We exit ipf_global here because a program that enters in
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* here will have a lock on it and goto sleep having this lock.
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* If someone were to do an 'ipf -D' the system would then
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* deadlock. The catch with releasing it here is that the
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* caller of this function expects it to be held when we
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* return so we have to reacquire it in here.
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*/
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RWLOCK_EXIT(&ipf_global);
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MUTEX_ENTER(&ipf_authmx);
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#ifdef _KERNEL
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# if SOLARIS
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error = 0;
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if (!cv_wait_sig(&ipfauthwait, &ipf_authmx.ipf_lk))
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error = EINTR;
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# else /* SOLARIS */
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# ifdef __hpux
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{
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lock_t *l;
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l = get_sleep_lock(&fr_authnext);
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error = sleep(&fr_authnext, PZERO+1);
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spinunlock(l);
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}
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# else
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# ifdef __osf__
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error = mpsleep(&fr_authnext, PSUSP|PCATCH, "fr_authnext", 0,
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&ipf_authmx, MS_LOCK_SIMPLE);
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# else
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error = SLEEP(&fr_authnext, "fr_authnext");
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# endif /* __osf__ */
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# endif /* __hpux */
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# endif /* SOLARIS */
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#endif
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MUTEX_EXIT(&ipf_authmx);
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READ_ENTER(&ipf_global);
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if (error == 0) {
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READ_ENTER(&ipf_auth);
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goto fr_authioctlloop;
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}
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break;
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case SIOCAUTHR:
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error = fr_inobj(data, &auth, IPFOBJ_FRAUTH);
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if (error != 0)
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return error;
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SPL_NET(s);
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WRITE_ENTER(&ipf_auth);
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i = au->fra_index;
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fra = fr_auth + i;
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if ((i < 0) || (i >= fr_authsize) ||
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(fra->fra_info.fin_id != au->fra_info.fin_id)) {
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RWLOCK_EXIT(&ipf_auth);
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SPL_X(s);
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return ESRCH;
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}
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m = fr_authpkts[i];
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fra->fra_index = -2;
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fra->fra_pass = au->fra_pass;
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fr_authpkts[i] = NULL;
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RWLOCK_EXIT(&ipf_auth);
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#ifdef _KERNEL
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if ((m != NULL) && (au->fra_info.fin_out != 0)) {
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# ifdef MENTAT
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error = !putq(fra->fra_q, m);
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# else /* MENTAT */
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# ifdef linux
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|
# else
|
|
# if (_BSDI_VERSION >= 199802) || defined(__OpenBSD__) || \
|
|
(defined(__sgi) && (IRIX >= 60500) || \
|
|
(defined(__FreeBSD__) && (__FreeBSD_version >= 470102)))
|
|
error = ip_output(m, NULL, NULL, IP_FORWARDING, NULL,
|
|
NULL);
|
|
# else
|
|
error = ip_output(m, NULL, NULL, IP_FORWARDING, NULL);
|
|
# endif
|
|
# endif /* Linux */
|
|
# endif /* MENTAT */
|
|
if (error != 0)
|
|
fr_authstats.fas_sendfail++;
|
|
else
|
|
fr_authstats.fas_sendok++;
|
|
} else if (m) {
|
|
# ifdef MENTAT
|
|
error = !putq(fra->fra_q, m);
|
|
# else /* MENTAT */
|
|
# ifdef linux
|
|
# else
|
|
# if __FreeBSD_version >= 501000
|
|
netisr_dispatch(NETISR_IP, m);
|
|
# else
|
|
# if IRIX >= 60516
|
|
ifq = &((struct ifnet *)fra->fra_info.fin_ifp)->if_snd;
|
|
# else
|
|
ifq = &ipintrq;
|
|
# endif
|
|
if (IF_QFULL(ifq)) {
|
|
IF_DROP(ifq);
|
|
FREE_MB_T(m);
|
|
error = ENOBUFS;
|
|
} else {
|
|
IF_ENQUEUE(ifq, m);
|
|
# if IRIX < 60500
|
|
schednetisr(NETISR_IP);
|
|
# endif
|
|
}
|
|
# endif
|
|
# endif /* Linux */
|
|
# endif /* MENTAT */
|
|
if (error != 0)
|
|
fr_authstats.fas_quefail++;
|
|
else
|
|
fr_authstats.fas_queok++;
|
|
} else
|
|
error = EINVAL;
|
|
# ifdef MENTAT
|
|
if (error != 0)
|
|
error = EINVAL;
|
|
# else /* MENTAT */
|
|
/*
|
|
* If we experience an error which will result in the packet
|
|
* not being processed, make sure we advance to the next one.
|
|
*/
|
|
if (error == ENOBUFS) {
|
|
fr_authused--;
|
|
fra->fra_index = -1;
|
|
fra->fra_pass = 0;
|
|
if (i == fr_authstart) {
|
|
while (fra->fra_index == -1) {
|
|
i++;
|
|
if (i == fr_authsize)
|
|
i = 0;
|
|
fr_authstart = i;
|
|
if (i == fr_authend)
|
|
break;
|
|
}
|
|
if (fr_authstart == fr_authend) {
|
|
fr_authnext = 0;
|
|
fr_authstart = fr_authend = 0;
|
|
}
|
|
}
|
|
}
|
|
# endif /* MENTAT */
|
|
#endif /* _KERNEL */
|
|
SPL_X(s);
|
|
break;
|
|
|
|
default :
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
return error;
|
|
}
|
|
|
|
|
|
/*
|
|
* Free all network buffer memory used to keep saved packets.
|
|
*/
|
|
void fr_authunload()
|
|
{
|
|
register int i;
|
|
register frauthent_t *fae, **faep;
|
|
frentry_t *fr, **frp;
|
|
mb_t *m;
|
|
|
|
if (fr_auth != NULL) {
|
|
KFREES(fr_auth, fr_authsize * sizeof(*fr_auth));
|
|
fr_auth = NULL;
|
|
}
|
|
|
|
if (fr_authpkts != NULL) {
|
|
for (i = 0; i < fr_authsize; i++) {
|
|
m = fr_authpkts[i];
|
|
if (m != NULL) {
|
|
FREE_MB_T(m);
|
|
fr_authpkts[i] = NULL;
|
|
}
|
|
}
|
|
KFREES(fr_authpkts, fr_authsize * sizeof(*fr_authpkts));
|
|
fr_authpkts = NULL;
|
|
}
|
|
|
|
faep = &fae_list;
|
|
while ((fae = *faep) != NULL) {
|
|
*faep = fae->fae_next;
|
|
KFREE(fae);
|
|
}
|
|
ipauth = NULL;
|
|
|
|
if (fr_authlist != NULL) {
|
|
for (frp = &fr_authlist; ((fr = *frp) != NULL); ) {
|
|
if (fr->fr_ref == 1) {
|
|
*frp = fr->fr_next;
|
|
KFREE(fr);
|
|
} else
|
|
frp = &fr->fr_next;
|
|
}
|
|
}
|
|
|
|
if (fr_auth_init == 1) {
|
|
# if SOLARIS && defined(_KERNEL)
|
|
cv_destroy(&ipfauthwait);
|
|
# endif
|
|
MUTEX_DESTROY(&ipf_authmx);
|
|
RW_DESTROY(&ipf_auth);
|
|
|
|
fr_auth_init = 0;
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Slowly expire held auth records. Timeouts are set
|
|
* in expectation of this being called twice per second.
|
|
*/
|
|
void fr_authexpire()
|
|
{
|
|
register int i;
|
|
register frauth_t *fra;
|
|
register frauthent_t *fae, **faep;
|
|
register frentry_t *fr, **frp;
|
|
mb_t *m;
|
|
# if !defined(MENAT) && defined(_KERNEL) && defined(USE_SPL)
|
|
int s;
|
|
# endif
|
|
|
|
if (fr_auth_lock)
|
|
return;
|
|
|
|
SPL_NET(s);
|
|
WRITE_ENTER(&ipf_auth);
|
|
for (i = 0, fra = fr_auth; i < fr_authsize; i++, fra++) {
|
|
fra->fra_age--;
|
|
if ((fra->fra_age == 0) && (m = fr_authpkts[i])) {
|
|
FREE_MB_T(m);
|
|
fr_authpkts[i] = NULL;
|
|
fr_auth[i].fra_index = -1;
|
|
fr_authstats.fas_expire++;
|
|
fr_authused--;
|
|
}
|
|
}
|
|
|
|
for (faep = &fae_list; ((fae = *faep) != NULL); ) {
|
|
fae->fae_age--;
|
|
if (fae->fae_age == 0) {
|
|
*faep = fae->fae_next;
|
|
KFREE(fae);
|
|
fr_authstats.fas_expire++;
|
|
} else
|
|
faep = &fae->fae_next;
|
|
}
|
|
if (fae_list != NULL)
|
|
ipauth = &fae_list->fae_fr;
|
|
else
|
|
ipauth = NULL;
|
|
|
|
for (frp = &fr_authlist; ((fr = *frp) != NULL); ) {
|
|
if (fr->fr_ref == 1) {
|
|
*frp = fr->fr_next;
|
|
KFREE(fr);
|
|
} else
|
|
frp = &fr->fr_next;
|
|
}
|
|
RWLOCK_EXIT(&ipf_auth);
|
|
SPL_X(s);
|
|
}
|
|
|
|
int fr_preauthcmd(cmd, fr, frptr)
|
|
ioctlcmd_t cmd;
|
|
frentry_t *fr, **frptr;
|
|
{
|
|
frauthent_t *fae, **faep;
|
|
int error = 0;
|
|
# if !defined(MENAT) && defined(_KERNEL) && defined(USE_SPL)
|
|
int s;
|
|
#endif
|
|
|
|
if ((cmd != SIOCADAFR) && (cmd != SIOCRMAFR))
|
|
return EIO;
|
|
|
|
for (faep = &fae_list; ((fae = *faep) != NULL); ) {
|
|
if (&fae->fae_fr == fr)
|
|
break;
|
|
else
|
|
faep = &fae->fae_next;
|
|
}
|
|
|
|
if (cmd == (ioctlcmd_t)SIOCRMAFR) {
|
|
if (fr == NULL || frptr == NULL)
|
|
error = EINVAL;
|
|
else if (fae == NULL)
|
|
error = ESRCH;
|
|
else {
|
|
SPL_NET(s);
|
|
WRITE_ENTER(&ipf_auth);
|
|
*faep = fae->fae_next;
|
|
if (ipauth == &fae->fae_fr)
|
|
ipauth = fae_list ? &fae_list->fae_fr : NULL;
|
|
RWLOCK_EXIT(&ipf_auth);
|
|
SPL_X(s);
|
|
|
|
KFREE(fae);
|
|
}
|
|
} else if (fr != NULL && frptr != NULL) {
|
|
KMALLOC(fae, frauthent_t *);
|
|
if (fae != NULL) {
|
|
bcopy((char *)fr, (char *)&fae->fae_fr,
|
|
sizeof(*fr));
|
|
SPL_NET(s);
|
|
WRITE_ENTER(&ipf_auth);
|
|
fae->fae_age = fr_defaultauthage;
|
|
fae->fae_fr.fr_hits = 0;
|
|
fae->fae_fr.fr_next = *frptr;
|
|
*frptr = &fae->fae_fr;
|
|
fae->fae_next = *faep;
|
|
*faep = fae;
|
|
ipauth = &fae_list->fae_fr;
|
|
RWLOCK_EXIT(&ipf_auth);
|
|
SPL_X(s);
|
|
} else
|
|
error = ENOMEM;
|
|
} else
|
|
error = EINVAL;
|
|
return error;
|
|
}
|
|
|
|
|
|
/*
|
|
* Flush held packets.
|
|
* Must already be properly SPL'ed and Locked on &ipf_auth.
|
|
*
|
|
*/
|
|
int fr_authflush()
|
|
{
|
|
register int i, num_flushed;
|
|
mb_t *m;
|
|
|
|
if (fr_auth_lock)
|
|
return -1;
|
|
|
|
num_flushed = 0;
|
|
|
|
for (i = 0 ; i < fr_authsize; i++) {
|
|
m = fr_authpkts[i];
|
|
if (m != NULL) {
|
|
FREE_MB_T(m);
|
|
fr_authpkts[i] = NULL;
|
|
fr_auth[i].fra_index = -1;
|
|
/* perhaps add & use a flush counter inst.*/
|
|
fr_authstats.fas_expire++;
|
|
fr_authused--;
|
|
num_flushed++;
|
|
}
|
|
}
|
|
|
|
fr_authstart = 0;
|
|
fr_authend = 0;
|
|
fr_authnext = 0;
|
|
|
|
return num_flushed;
|
|
}
|