tools/ipftest.c - net/ipfilter - Rivoreo Source Code Repositories

 /*
  * Copyright (C) 2002-2006 by Darren Reed.
  *
  * See the IPFILTER.LICENCE file for details on licencing.
  */
 #include "ipf.h"
 #include "ipt.h"
 #include <sys/ioctl.h>
 #include <sys/file.h>

 #if !defined(lint)
 static const char sccsid[] = "@(#)ipt.c	1.19 6/3/96 (C) 1993-2000 Darren Reed";
 static const char rcsid[] = "@(#)$Id$";
 #endif

 extern	char	*optarg;
 extern	struct ipread	snoop, etherf, tcpd, pcap, iptext, iphex;
 extern	struct ifnet	*get_unit __P((char *, int));
 extern	void	init_ifp __P((void));
 extern	ipnat_t	*natparse __P((char *, int));
 extern	hostmap_t **ipf_hm_maptable;
 extern	hostmap_t *ipf_hm_maplist;

 ipfmutex_t	ipl_mutex, ipf_auth_mx, ipf_rw, ipf_stinsert;
 ipfmutex_t	ipf_nat_new, ipf_natio, ipf_timeoutlock;
 ipfrwlock_t	ipf_mutex, ipf_global, ipf_ipidfrag, ip_poolrw, ipf_frcache;
 ipfrwlock_t	ipf_frag, ipf_state, ipf_nat, ipf_natfrag, ipf_authlk;
 ipfrwlock_t	ipf_tokens;
 int	opts = OPT_DONOTHING;
 int	use_inet6 = 0;
 int	docksum = 0;
 int	pfil_delayed_copy = 0;
 int	main __P((int, char *[]));
 int	loadrules __P((char *, int));
 int	kmemcpy __P((char *, long, int));
 int     kstrncpy __P((char *, long, int n));
 int	blockreason;
 void	dumpnat __P((void));
 void	dumpstate __P((void));
 void	dumplookups __P((void));
 void	dumpgroups __P((void));
 void	dumprules __P((frentry_t *));
 void	drain_log __P((char *));
 void	fixv4sums __P((mb_t *, ip_t *));

 #if defined(__NetBSD__) || defined(__OpenBSD__) || SOLARIS || \
 	(_BSDI_VERSION >= 199701) || (__FreeBSD_version >= 300000) || \
 	defined(__osf__) || defined(linux)
 int ipftestioctl __P((int, ioctlcmd_t, ...));
 int ipnattestioctl __P((int, ioctlcmd_t, ...));
 int ipstatetestioctl __P((int, ioctlcmd_t, ...));
 int ipauthtestioctl __P((int, ioctlcmd_t, ...));
 int ipscantestioctl __P((int, ioctlcmd_t, ...));
 int ipsynctestioctl __P((int, ioctlcmd_t, ...));
 int ipooltestioctl __P((int, ioctlcmd_t, ...));
 #else
 int ipftestioctl __P((dev_t, ioctlcmd_t, void *));
 int ipnattestioctl __P((dev_t, ioctlcmd_t, void *));
 int ipstatetestioctl __P((dev_t, ioctlcmd_t, void *));
 int ipauthtestioctl __P((dev_t, ioctlcmd_t, void *));
 int ipsynctestioctl __P((dev_t, ioctlcmd_t, void *));
 int ipscantestioctl __P((dev_t, ioctlcmd_t, void *));
 int ipooltestioctl __P((dev_t, ioctlcmd_t, void *));
 #endif

 static	ioctlfunc_t	iocfunctions[IPL_LOGSIZE] = { ipftestioctl,
 						      ipnattestioctl,
 						      ipstatetestioctl,
 						      ipauthtestioctl,
 						      ipsynctestioctl,
 						      ipscantestioctl,
 						      ipooltestioctl,
 						      NULL };


 int main(argc,argv)
 int argc;
 char *argv[];
 {
 	char	*datain, *iface, *ifname, *logout;
 	int	fd, i, dir, c, loaded, dump, hlen;
 	struct	in_addr	sip;
 	struct	ifnet	*ifp;
 	struct	ipread	*r;
 	mb_t	mb, *m, *n;
 	ip_t	*ip;

 	m = &mb;
 	dir = 0;
 	dump = 0;
 	hlen = 0;
 	loaded = 0;
 	r = &iptext;
 	iface = NULL;
 	logout = NULL;
 	datain = NULL;
 	sip.s_addr = 0;
 	ifname = "anon0";

 	MUTEX_INIT(&ipf_rw, "ipf rw mutex");
 	MUTEX_INIT(&ipf_timeoutlock, "ipf timeout lock");
 	RWLOCK_INIT(&ipf_global, "ipf filter load/unload mutex");
 	RWLOCK_INIT(&ipf_mutex, "ipf filter rwlock");
 	RWLOCK_INIT(&ipf_ipidfrag, "ipf IP NAT-Frag rwlock");
 	RWLOCK_INIT(&ipf_frcache, "ipf filter cache");
 	RWLOCK_INIT(&ipf_tokens, "ipf token rwlock");

 	initparse();
 	if (ipf_initialise() == -1)
 		abort();
 	ipf_running = 1;

 	while ((c = getopt(argc, argv, "6bCdDF:i:I:l:N:P:or:RS:T:vxX")) != -1)
 		switch (c)
 		{
 		case '6' :
 #ifdef	USE_INET6
 			use_inet6 = 1;
 #else
 			fprintf(stderr, "IPv6 not supported\n");
 			exit(1);
 #endif
 			break;
 		case 'b' :
 			opts |= OPT_BRIEF;
 			break;
 		case 'd' :
 			opts |= OPT_DEBUG;
 			break;
 		case 'C' :
 			docksum = 1;
 			break;
 		case 'D' :
 			dump = 1;
 			break;
 		case 'F' :
 			if (strcasecmp(optarg, "pcap") == 0)
 				r = &pcap;
 			else if (strcasecmp(optarg, "etherfind") == 0)
 				r = &etherf;
 			else if (strcasecmp(optarg, "snoop") == 0)
 				r = &snoop;
 			else if (strcasecmp(optarg, "tcpdump") == 0)
 				r = &tcpd;
 			else if (strcasecmp(optarg, "hex") == 0)
 				r = &iphex;
 			else if (strcasecmp(optarg, "text") == 0)
 				r = &iptext;
 			break;
 		case 'i' :
 			datain = optarg;
 			break;
 		case 'I' :
 			ifname = optarg;
 			break;
 		case 'l' :
 			logout = optarg;
 			break;
 		case 'N' :
 			if (ipnat_parsefile(-1, ipnat_addrule, ipnattestioctl,
 					    optarg) == -1)
 				return -1;
 			loaded = 1;
 			opts |= OPT_NAT;
 			break;
 		case 'o' :
 			opts |= OPT_SAVEOUT;
 			break;
 		case 'P' :
 			if (ippool_parsefile(-1, optarg, ipooltestioctl) == -1)
 				return -1;
 			loaded = 1;
 			break;
 		case 'r' :
 			if (ipf_parsefile(-1, ipf_addrule, iocfunctions,
 					  optarg) == -1)
 				return -1;
 			loaded = 1;
 			break;
 		case 'S' :
 			sip.s_addr = inet_addr(optarg);
 			break;
 		case 'R' :
 			opts |= OPT_NORESOLVE;
 			break;
 		case 'T' :
 			ipf_dotuning(-1, optarg, ipftestioctl);
 			break;
 		case 'v' :
 			opts |= OPT_VERBOSE;
 			break;
 		case 'x' :
 			opts |= OPT_HEX;
 			break;
 		}

 	if (loaded == 0) {
 		(void)fprintf(stderr,"no rules loaded\n");
 		exit(-1);
 	}

 	if (opts & OPT_SAVEOUT)
 		init_ifp();

 	if (datain)
 		fd = (*r->r_open)(datain);
 	else
 		fd = (*r->r_open)("-");

 	if (fd < 0)
 		exit(-1);

 	m->m_data = (char *)m->mb_buf;
 	while ((i = (*r->r_readip)(m, &iface, &dir)) > 0) {

 		if ((iface == NULL) || (*iface == '\0'))
 			iface = ifname;

 		ip = MTOD(m, ip_t *);
 		ifp = get_unit(iface, IP_V(ip));

 		if (!use_inet6) {
 			if ((r->r_flags & R_DO_CKSUM) || docksum)
 				fixv4sums(m, ip);
 			hlen = IP_HL(ip) << 2;
 			if (sip.s_addr)
 				dir = !(sip.s_addr == ip->ip_src.s_addr);
 		}
 #ifdef	USE_INET6
 		else
 			hlen = sizeof(ip6_t);
 #endif
 		/* ipfr_slowtimer(); */
 		blockreason = 0;
 		m = &mb;
 		m->mb_len = i;
 		i = ipf_check(ip, hlen, ifp, dir, &m);
 		if ((opts & OPT_NAT) == 0)
 			switch (i)
 			{
 			case -4 :
 				(void)printf("preauth");
 				break;
 			case -3 :
 				(void)printf("account");
 				break;
 			case -2 :
 				(void)printf("auth");
 				break;
 			case -1 :
 				(void)printf("block");
 				break;
 			case 0 :
 				(void)printf("pass");
 				break;
 			case 1 :
 				if (m == NULL)
 					(void)printf("bad-packet");
 				else
 					(void)printf("nomatch");
 				break;
 			case 3 :
 				(void)printf("block return-rst");
 				break;
 			case 4 :
 				(void)printf("block return-icmp");
 				break;
 			case 5 :
 				(void)printf("block return-icmp-as-dest");
 				break;
 			default :
 				(void)printf("recognised return %#x\n", i);
 				break;
 			}

 		if (!(opts & OPT_BRIEF)) {
 			putchar(' ');
 			if (m != NULL)
 				printpacket(dir, m);
 			else
 				printpacket(dir, &mb);
 			printf("--------------");
 		} else if ((opts & (OPT_BRIEF|OPT_NAT)) ==
 			   (OPT_NAT|OPT_BRIEF)) {
 			if (m != NULL)
 				printpacket(dir, m);
 			else
 				printpacket(dir, &mb);
 		}

 		if (dir && (ifp != NULL) && IP_V(ip) && (m != NULL))
 #if  defined(__sgi) && (IRIX < 60500)
 			(*ifp->if_output)(ifp, (void *)m, NULL);
 #else
 # if TRU64 >= 1885
 			(*ifp->if_output)(ifp, (void *)m, NULL, 0, 0);
 # else
 			(*ifp->if_output)(ifp, (void *)m, NULL, 0);
 # endif
 #endif

 		while ((m != NULL) && (m != &mb)) {
 			n = m->mb_next;
 			freembt(m);
 			m = n;
 		}

 		if ((opts & (OPT_BRIEF|OPT_NAT)) != (OPT_NAT|OPT_BRIEF))
 			putchar('\n');
 		dir = 0;
 		if (iface != ifname) {
 			free(iface);
 			iface = ifname;
 		}
 		m = &mb;
 		m->mb_data = (char *)m->mb_buf;
 	}

 	if (i != 0)
 		fprintf(stderr, "readip failed: %d\n", i);
 	(*r->r_close)();

 	if (logout != NULL) {
 		drain_log(logout);
 	}

 	if (dump == 1)  {
 		dumpnat();
 		dumpstate();
 		dumplookups();
 		dumpgroups();
 	}

 	ipf_deinitialise();

 	return 0;
 }


 #if defined(__NetBSD__) || defined(__OpenBSD__) || SOLARIS || \
 	(_BSDI_VERSION >= 199701) || (__FreeBSD_version >= 300000) || \
 	defined(__osf__) || defined(linux)
 int ipftestioctl(int dev, ioctlcmd_t cmd, ...)
 {
 	extern int ipf_interror;
 	caddr_t data;
 	va_list ap;
 	int i;

 	va_start(ap, cmd);
 	data = va_arg(ap, caddr_t);
 	va_end(ap);

 	i = ipfioctl(IPL_LOGIPF, cmd, data, FWRITE|FREAD);
 	if (opts & OPT_DEBUG)
 		fprintf(stderr, "ipfioctl(IPF,%#x,%p) = %d (%d)\n",
 			(u_int)cmd, data, i, ipf_interror);
 	if (i != 0) {
 		errno = i;
 		return -1;
 	}
 	return 0;
 }


 int ipnattestioctl(int dev, ioctlcmd_t cmd, ...)
 {
 	caddr_t data;
 	va_list ap;
 	int i;

 	va_start(ap, cmd);
 	data = va_arg(ap, caddr_t);
 	va_end(ap);

 	i = ipfioctl(IPL_LOGNAT, cmd, data, FWRITE|FREAD);
 	if (opts & OPT_DEBUG)
 		fprintf(stderr, "ipfioctl(NAT,%#x,%p) = %d\n",
 			(u_int)cmd, data, i);
 	if (i != 0) {
 		errno = i;
 		return -1;
 	}
 	return 0;
 }


 int ipstatetestioctl(int dev, ioctlcmd_t cmd, ...)
 {
 	caddr_t data;
 	va_list ap;
 	int i;

 	va_start(ap, cmd);
 	data = va_arg(ap, caddr_t);
 	va_end(ap);

 	i = ipfioctl(IPL_LOGSTATE, cmd, data, FWRITE|FREAD);
 	if ((opts & OPT_DEBUG) || (i != 0))
 		fprintf(stderr, "ipfioctl(STATE,%#x,%p) = %d\n",
 			(u_int)cmd, data, i);
 	if (i != 0) {
 		errno = i;
 		return -1;
 	}
 	return 0;
 }


 int ipauthtestioctl(int dev, ioctlcmd_t cmd, ...)
 {
 	caddr_t data;
 	va_list ap;
 	int i;

 	va_start(ap, cmd);
 	data = va_arg(ap, caddr_t);
 	va_end(ap);

 	i = ipfioctl(IPL_LOGAUTH, cmd, data, FWRITE|FREAD);
 	if ((opts & OPT_DEBUG) || (i != 0))
 		fprintf(stderr, "ipfioctl(AUTH,%#x,%p) = %d\n",
 			(u_int)cmd, data, i);
 	if (i != 0) {
 		errno = i;
 		return -1;
 	}
 	return 0;
 }


 int ipscantestioctl(int dev, ioctlcmd_t cmd, ...)
 {
 	caddr_t data;
 	va_list ap;
 	int i;

 	va_start(ap, cmd);
 	data = va_arg(ap, caddr_t);
 	va_end(ap);

 	i = ipfioctl(IPL_LOGSCAN, cmd, data, FWRITE|FREAD);
 	if ((opts & OPT_DEBUG) || (i != 0))
 		fprintf(stderr, "ipfioctl(SCAN,%#x,%p) = %d\n",
 			(u_int)cmd, data, i);
 	if (i != 0) {
 		errno = i;
 		return -1;
 	}
 	return 0;
 }


 int ipsynctestioctl(int dev, ioctlcmd_t cmd, ...)
 {
 	caddr_t data;
 	va_list ap;
 	int i;

 	va_start(ap, cmd);
 	data = va_arg(ap, caddr_t);
 	va_end(ap);

 	i = ipfioctl(IPL_LOGSYNC, cmd, data, FWRITE|FREAD);
 	if ((opts & OPT_DEBUG) || (i != 0))
 		fprintf(stderr, "ipfioctl(SYNC,%#x,%p) = %d\n",
 			(u_int)cmd, data, i);
 	if (i != 0) {
 		errno = i;
 		return -1;
 	}
 	return 0;
 }


 int ipooltestioctl(int dev, ioctlcmd_t cmd, ...)
 {
 	caddr_t data;
 	va_list ap;
 	int i;

 	va_start(ap, cmd);
 	data = va_arg(ap, caddr_t);
 	va_end(ap);

 	i = ipfioctl(IPL_LOGLOOKUP, cmd, data, FWRITE|FREAD);
 	if ((opts & OPT_DEBUG) || (i != 0))
 		fprintf(stderr, "ipfioctl(POOL,%#x,%p) = %d\n",
 			(u_int)cmd, data, i);
 	if (i != 0) {
 		errno = i;
 		return -1;
 	}
 	return 0;
 }
 #else
 int ipftestioctl(dev, cmd, data)
 dev_t dev;
 ioctlcmd_t cmd;
 void *data;
 {
 	extern	int	ipf_interror;
 	int i;

 	i = ipfioctl(IPL_LOGIPF, cmd, data, FWRITE|FREAD);
 	if ((opts & OPT_DEBUG) || (i != 0))
 		fprintf(stderr, "ipfioctl(IPF,%#x,%p) = %d (%d)\n", cmd, data, i, ipf_interror);
 	if (i != 0) {
 		errno = i;
 		return -1;
 	}
 	return 0;
 }


 int ipnattestioctl(dev, cmd, data)
 dev_t dev;
 ioctlcmd_t cmd;
 void *data;
 {
 	int i;

 	i = ipfioctl(IPL_LOGNAT, cmd, data, FWRITE|FREAD);
 	if ((opts & OPT_DEBUG) || (i != 0))
 		fprintf(stderr, "ipfioctl(NAT,%#x,%p) = %d\n", cmd, data, i);
 	if (i != 0) {
 		errno = i;
 		return -1;
 	}
 	return 0;
 }


 int ipstatetestioctl(dev, cmd, data)
 dev_t dev;
 ioctlcmd_t cmd;
 void *data;
 {
 	int i;

 	i = ipfioctl(IPL_LOGSTATE, cmd, data, FWRITE|FREAD);
 	if ((opts & OPT_DEBUG) || (i != 0))
 		fprintf(stderr, "ipfioctl(STATE,%#x,%p) = %d\n", cmd, data, i);
 	if (i != 0) {
 		errno = i;
 		return -1;
 	}
 	return 0;
 }


 int ipauthtestioctl(dev, cmd, data)
 dev_t dev;
 ioctlcmd_t cmd;
 void *data;
 {
 	int i;

 	i = ipfioctl(IPL_LOGAUTH, cmd, data, FWRITE|FREAD);
 	if ((opts & OPT_DEBUG) || (i != 0))
 		fprintf(stderr, "ipfioctl(AUTH,%#x,%p) = %d\n", cmd, data, i);
 	if (i != 0) {
 		errno = i;
 		return -1;
 	}
 	return 0;
 }


 int ipsynctestioctl(dev, cmd, data)
 dev_t dev;
 ioctlcmd_t cmd;
 void *data;
 {
 	int i;

 	i = ipfioctl(IPL_LOGSYNC, cmd, data, FWRITE|FREAD);
 	if ((opts & OPT_DEBUG) || (i != 0))
 		fprintf(stderr, "ipfioctl(SYNC,%#x,%p) = %d\n", cmd, data, i);
 	if (i != 0) {
 		errno = i;
 		return -1;
 	}
 	return 0;
 }


 int ipscantestioctl(dev, cmd, data)
 dev_t dev;
 ioctlcmd_t cmd;
 void *data;
 {
 	int i;

 	i = ipfioctl(IPL_LOGSCAN, cmd, data, FWRITE|FREAD);
 	if ((opts & OPT_DEBUG) || (i != 0))
 		fprintf(stderr, "ipfioctl(SCAN,%#x,%p) = %d\n", cmd, data, i);
 	if (i != 0) {
 		errno = i;
 		return -1;
 	}
 	return 0;
 }


 int ipooltestioctl(dev, cmd, data)
 dev_t dev;
 ioctlcmd_t cmd;
 void *data;
 {
 	int i;

 	i = ipfioctl(IPL_LOGLOOKUP, cmd, data, FWRITE|FREAD);
 	if (opts & OPT_DEBUG)
 		fprintf(stderr, "ipfioctl(POOL,%#x,%p) = %d\n", cmd, data, i);
 	if (i != 0) {
 		errno = i;
 		return -1;
 	}
 	return 0;
 }
 #endif


 int kmemcpy(addr, offset, size)
 char *addr;
 long offset;
 int size;
 {
 	bcopy((char *)offset, addr, size);
 	return 0;
 }


 int kstrncpy(buf, pos, n)
 char *buf;
 long pos;
 int n;
 {
 	char *ptr;

 	ptr = (char *)pos;

 	while ((n > 0) && (*buf++ = *ptr++))
 		;
 	return 0;
 }


 /*
  * Display the built up NAT table rules and mapping entries.
  */
 void dumpnat()
 {
 	hostmap_t *hm;
 	ipnat_t	*ipn;
 	nat_t *nat;

 	printf("List of active MAP/Redirect filters:\n");
 	for (ipn = ipf_nat_list; ipn != NULL; ipn = ipn->in_next)
 		printnat(ipn, opts & (OPT_DEBUG|OPT_VERBOSE));
 	printf("\nList of active sessions:\n");
 	for (nat = ipf_nat_instances; nat; nat = nat->nat_next) {
 		printactivenat(nat, opts, 0, 0);
 		if (nat->nat_aps)
 			printaps(nat->nat_aps, opts);
 	}

 	printf("\nHostmap table:\n");
 	for (hm = ipf_hm_maplist; hm != NULL; hm = hm->hm_next)
 		printhostmap(hm, hm->hm_hv);
 }


 /*
  * Display the built up state table rules and mapping entries.
  */
 void dumpstate()
 {
 	ipstate_t *ips;

 	printf("List of active state sessions:\n");
 	for (ips = ipf_state_list; ips != NULL; )
 		ips = printstate(ips, opts & (OPT_DEBUG|OPT_VERBOSE),
 				 ipf_ticks);
 }


 void dumplookups()
 {
 	iphtable_t *iph;
 	ip_pool_t *ipl;
 	int i;

 	printf("List of configured pools\n");
 	for (i = 0; i < IPL_LOGSIZE; i++)
 		for (ipl = ipf_pool_list[i]; ipl != NULL; ipl = ipl->ipo_next)
 			printpool(ipl, bcopywrap, NULL, opts);

 	printf("List of configured hash tables\n");
 	for (i = 0; i < IPL_LOGSIZE; i++)
 		for (iph = ipf_htables[i]; iph != NULL; iph = iph->iph_next)
 			printhash(iph, bcopywrap, NULL, opts);
 }


 void dumpgroups()
 {
 	frgroup_t *fg;
 	int i;

 	printf("List of groups configured (set 0)\n");
 	for (i = 0; i < IPL_LOGSIZE; i++)
 		for (fg =  ipf_groups[i][0]; fg != NULL; fg = fg->fg_next) {
 			printf("Dev.%d. Group %s Ref %d Flags %#x\n",
 				i, fg->fg_name, fg->fg_ref, fg->fg_flags);
 			dumprules(fg->fg_start);
 		}

 	printf("List of groups configured (set 1)\n");
 	for (i = 0; i < IPL_LOGSIZE; i++)
 		for (fg =  ipf_groups[i][1]; fg != NULL; fg = fg->fg_next) {
 			printf("Dev.%d. Group %s Ref %d Flags %#x\n",
 				i, fg->fg_name, fg->fg_ref, fg->fg_flags);
 			dumprules(fg->fg_start);
 		}

 	printf("Rules configured (set 0, in)\n");
 	dumprules(ipf_rules[0][0]);
 	printf("Rules configured (set 0, out)\n");
 	dumprules(ipf_rules[1][0]);
 	printf("Rules configured (set 1, in)\n");
 	dumprules(ipf_rules[0][1]);
 	printf("Rules configured (set 1, out)\n");
 	dumprules(ipf_rules[1][1]);

 	printf("Accounting rules configured (set 0, in)\n");
 	dumprules(ipf_acct[0][0]);
 	printf("Accounting rules configured (set 0, out)\n");
 	dumprules(ipf_acct[0][1]);
 	printf("Accounting rules configured (set 1, in)\n");
 	dumprules(ipf_acct[1][0]);
 	printf("Accounting rules configured (set 1, out)\n");
 	dumprules(ipf_acct[1][1]);
 }

 void dumprules(rulehead)
 frentry_t *rulehead;
 {
 	frentry_t *fr;

 	for (fr = rulehead; fr != NULL; fr = fr->fr_next) {
 #ifdef	USE_QUAD_T
 		printf("%qu ",(unsigned long long)fr->fr_hits);
 #else
 		printf("%ld ", fr->fr_hits);
 #endif
 		printfr(fr, ipftestioctl);
 	}
 }


 void drain_log(filename)
 char *filename;
 {
 	char buffer[DEFAULT_IPFLOGSIZE];
 	struct iovec iov;
 	struct uio uio;
 	size_t resid;
 	int fd, i;

 	fd = open(filename, O_CREAT|O_TRUNC|O_WRONLY, 0644);
 	if (fd == -1) {
 		perror("drain_log:open");
 		return;
 	}

 	for (i = 0; i <= IPL_LOGMAX; i++)
 		while (1) {
 			bzero((char *)&iov, sizeof(iov));
 			iov.iov_base = buffer;
 			iov.iov_len = sizeof(buffer);

 			bzero((char *)&uio, sizeof(uio));
 			uio.uio_iov = &iov;
 			uio.uio_iovcnt = 1;
 			uio.uio_resid = iov.iov_len;
 			resid = uio.uio_resid;

 			if (ipf_log_read(i, &uio) == 0) {
 				/*
 				 * If nothing was read then break out.
 				 */
 				if (uio.uio_resid == resid)
 					break;
 				write(fd, buffer, resid - uio.uio_resid);
 			} else
 				break;
 	}

 	close(fd);
 }


 void fixv4sums(m, ip)
 mb_t *m;
 ip_t *ip;
 {
 	u_char *csump, *hdr;

 	ip->ip_sum = 0;
 	ip->ip_sum = ipf_cksum((u_short *)ip, IP_HL(ip) << 2);

 	csump = (u_char *)ip;
 	csump += IP_HL(ip) << 2;

 	switch (ip->ip_p)
 	{
 	case IPPROTO_TCP :
 		hdr = csump;
 		csump += offsetof(tcphdr_t, th_sum);
 		break;
 	case IPPROTO_UDP :
 		hdr = csump;
 		csump += offsetof(udphdr_t, uh_sum);
 		break;
 	case IPPROTO_ICMP :
 		hdr = csump;
 		csump += offsetof(icmphdr_t, icmp_cksum);
 		break;
 	default :
 		csump = NULL;
 		hdr = NULL;
 		break;
 	}
 	if (hdr != NULL) {
 		*csump = 0;
 		*(u_short *)csump = fr_cksum(m, ip, ip->ip_p, hdr,
 					     ntohs(ip->ip_len));
 	}
 }
	/*
	* Copyright (C) 2002-2006 by Darren Reed.
	*
	* See the IPFILTER.LICENCE file for details on licencing.
	*/
	#include "ipf.h"
	#include "ipt.h"
	#include <sys/ioctl.h>
	#include <sys/file.h>

	#if !defined(lint)
	static const char sccsid[] = "@(#)ipt.c 1.19 6/3/96 (C) 1993-2000 Darren Reed";
	static const char rcsid[] = "@(#)$Id$";
	#endif

	extern char *optarg;
	extern struct ipread snoop, etherf, tcpd, pcap, iptext, iphex;
	extern struct ifnet get_unit __P((char , int));
	extern void init_ifp __P((void));
	extern ipnat_t natparse __P((char , int));
	extern hostmap_t **ipf_hm_maptable;
	extern hostmap_t *ipf_hm_maplist;

	ipfmutex_t ipl_mutex, ipf_auth_mx, ipf_rw, ipf_stinsert;
	ipfmutex_t ipf_nat_new, ipf_natio, ipf_timeoutlock;
	ipfrwlock_t ipf_mutex, ipf_global, ipf_ipidfrag, ip_poolrw, ipf_frcache;
	ipfrwlock_t ipf_frag, ipf_state, ipf_nat, ipf_natfrag, ipf_authlk;
	ipfrwlock_t ipf_tokens;
	int opts = OPT_DONOTHING;
	int use_inet6 = 0;
	int docksum = 0;
	int pfil_delayed_copy = 0;
	int main __P((int, char *[]));
	int loadrules __P((char *, int));
	int kmemcpy __P((char *, long, int));
	int kstrncpy __P((char *, long, int n));
	int blockreason;
	void dumpnat __P((void));
	void dumpstate __P((void));
	void dumplookups __P((void));
	void dumpgroups __P((void));
	void dumprules __P((frentry_t *));
	void drain_log __P((char *));
	void fixv4sums __P((mb_t , ip_t ));

	#if defined(__NetBSD__) \|\| defined(__OpenBSD__) \|\| SOLARIS \|\| \
	(_BSDI_VERSION >= 199701) \|\| (__FreeBSD_version >= 300000) \|\| \
	defined(__osf__) \|\| defined(linux)
	int ipftestioctl __P((int, ioctlcmd_t, ...));
	int ipnattestioctl __P((int, ioctlcmd_t, ...));
	int ipstatetestioctl __P((int, ioctlcmd_t, ...));
	int ipauthtestioctl __P((int, ioctlcmd_t, ...));
	int ipscantestioctl __P((int, ioctlcmd_t, ...));
	int ipsynctestioctl __P((int, ioctlcmd_t, ...));
	int ipooltestioctl __P((int, ioctlcmd_t, ...));
	#else
	int ipftestioctl __P((dev_t, ioctlcmd_t, void *));
	int ipnattestioctl __P((dev_t, ioctlcmd_t, void *));
	int ipstatetestioctl __P((dev_t, ioctlcmd_t, void *));
	int ipauthtestioctl __P((dev_t, ioctlcmd_t, void *));
	int ipsynctestioctl __P((dev_t, ioctlcmd_t, void *));
	int ipscantestioctl __P((dev_t, ioctlcmd_t, void *));
	int ipooltestioctl __P((dev_t, ioctlcmd_t, void *));
	#endif

	static ioctlfunc_t iocfunctions[IPL_LOGSIZE] = { ipftestioctl,
	ipnattestioctl,
	ipstatetestioctl,
	ipauthtestioctl,
	ipsynctestioctl,
	ipscantestioctl,
	ipooltestioctl,
	NULL };


	int main(argc,argv)
	int argc;
	char *argv[];
	{
	char datain, iface, ifname, logout;
	int fd, i, dir, c, loaded, dump, hlen;
	struct in_addr sip;
	struct ifnet *ifp;
	struct ipread *r;
	mb_t mb, m, n;
	ip_t *ip;

	m = &mb;
	dir = 0;
	dump = 0;
	hlen = 0;
	loaded = 0;
	r = &iptext;
	iface = NULL;
	logout = NULL;
	datain = NULL;
	sip.s_addr = 0;
	ifname = "anon0";

	MUTEX_INIT(&ipf_rw, "ipf rw mutex");
	MUTEX_INIT(&ipf_timeoutlock, "ipf timeout lock");
	RWLOCK_INIT(&ipf_global, "ipf filter load/unload mutex");
	RWLOCK_INIT(&ipf_mutex, "ipf filter rwlock");
	RWLOCK_INIT(&ipf_ipidfrag, "ipf IP NAT-Frag rwlock");
	RWLOCK_INIT(&ipf_frcache, "ipf filter cache");
	RWLOCK_INIT(&ipf_tokens, "ipf token rwlock");

	initparse();
	if (ipf_initialise() == -1)
	abort();
	ipf_running = 1;

	while ((c = getopt(argc, argv, "6bCdDF:i:I:l:N:P:or:RS:T:vxX")) != -1)
	switch (c)
	{
	case '6' :
	#ifdef USE_INET6
	use_inet6 = 1;
	#else
	fprintf(stderr, "IPv6 not supported\n");
	exit(1);
	#endif
	break;
	case 'b' :
	opts \|= OPT_BRIEF;
	break;
	case 'd' :
	opts \|= OPT_DEBUG;
	break;
	case 'C' :
	docksum = 1;
	break;
	case 'D' :
	dump = 1;
	break;
	case 'F' :
	if (strcasecmp(optarg, "pcap") == 0)
	r = &pcap;
	else if (strcasecmp(optarg, "etherfind") == 0)
	r = &etherf;
	else if (strcasecmp(optarg, "snoop") == 0)
	r = &snoop;
	else if (strcasecmp(optarg, "tcpdump") == 0)
	r = &tcpd;
	else if (strcasecmp(optarg, "hex") == 0)
	r = &iphex;
	else if (strcasecmp(optarg, "text") == 0)
	r = &iptext;
	break;
	case 'i' :
	datain = optarg;
	break;
	case 'I' :
	ifname = optarg;
	break;
	case 'l' :
	logout = optarg;
	break;
	case 'N' :
	if (ipnat_parsefile(-1, ipnat_addrule, ipnattestioctl,
	optarg) == -1)
	return -1;
	loaded = 1;
	opts \|= OPT_NAT;
	break;
	case 'o' :
	opts \|= OPT_SAVEOUT;
	break;
	case 'P' :
	if (ippool_parsefile(-1, optarg, ipooltestioctl) == -1)
	return -1;
	loaded = 1;
	break;
	case 'r' :
	if (ipf_parsefile(-1, ipf_addrule, iocfunctions,
	optarg) == -1)
	return -1;
	loaded = 1;
	break;
	case 'S' :
	sip.s_addr = inet_addr(optarg);
	break;
	case 'R' :
	opts \|= OPT_NORESOLVE;
	break;
	case 'T' :
	ipf_dotuning(-1, optarg, ipftestioctl);
	break;
	case 'v' :
	opts \|= OPT_VERBOSE;
	break;
	case 'x' :
	opts \|= OPT_HEX;
	break;
	}

	if (loaded == 0) {
	(void)fprintf(stderr,"no rules loaded\n");
	exit(-1);
	}

	if (opts & OPT_SAVEOUT)
	init_ifp();

	if (datain)
	fd = (*r->r_open)(datain);
	else
	fd = (*r->r_open)("-");

	if (fd < 0)
	exit(-1);

	m->m_data = (char *)m->mb_buf;
	while ((i = (*r->r_readip)(m, &iface, &dir)) > 0) {

	if ((iface == NULL) \|\| (*iface == '\0'))
	iface = ifname;

	ip = MTOD(m, ip_t *);
	ifp = get_unit(iface, IP_V(ip));

	if (!use_inet6) {
	if ((r->r_flags & R_DO_CKSUM) \|\| docksum)
	fixv4sums(m, ip);
	hlen = IP_HL(ip) << 2;
	if (sip.s_addr)
	dir = !(sip.s_addr == ip->ip_src.s_addr);
	}
	#ifdef USE_INET6
	else
	hlen = sizeof(ip6_t);
	#endif
	/* ipfr_slowtimer(); */
	blockreason = 0;
	m = &mb;
	m->mb_len = i;
	i = ipf_check(ip, hlen, ifp, dir, &m);
	if ((opts & OPT_NAT) == 0)
	switch (i)
	{
	case -4 :
	(void)printf("preauth");
	break;
	case -3 :
	(void)printf("account");
	break;
	case -2 :
	(void)printf("auth");
	break;
	case -1 :
	(void)printf("block");
	break;
	case 0 :
	(void)printf("pass");
	break;
	case 1 :
	if (m == NULL)
	(void)printf("bad-packet");
	else
	(void)printf("nomatch");
	break;
	case 3 :
	(void)printf("block return-rst");
	break;
	case 4 :
	(void)printf("block return-icmp");
	break;
	case 5 :
	(void)printf("block return-icmp-as-dest");
	break;
	default :
	(void)printf("recognised return %#x\n", i);
	break;
	}

	if (!(opts & OPT_BRIEF)) {
	putchar(' ');
	if (m != NULL)
	printpacket(dir, m);
	else
	printpacket(dir, &mb);
	printf("--------------");
	} else if ((opts & (OPT_BRIEF\|OPT_NAT)) ==
	(OPT_NAT\|OPT_BRIEF)) {
	if (m != NULL)
	printpacket(dir, m);
	else
	printpacket(dir, &mb);
	}

	if (dir && (ifp != NULL) && IP_V(ip) && (m != NULL))
	#if defined(__sgi) && (IRIX < 60500)
	(ifp->if_output)(ifp, (void )m, NULL);
	#else
	# if TRU64 >= 1885
	(ifp->if_output)(ifp, (void )m, NULL, 0, 0);
	# else
	(ifp->if_output)(ifp, (void )m, NULL, 0);
	# endif
	#endif

	while ((m != NULL) && (m != &mb)) {
	n = m->mb_next;
	freembt(m);
	m = n;
	}

	if ((opts & (OPT_BRIEF\|OPT_NAT)) != (OPT_NAT\|OPT_BRIEF))
	putchar('\n');
	dir = 0;
	if (iface != ifname) {
	free(iface);
	iface = ifname;
	}
	m = &mb;
	m->mb_data = (char *)m->mb_buf;
	}

	if (i != 0)
	fprintf(stderr, "readip failed: %d\n", i);
	(*r->r_close)();

	if (logout != NULL) {
	drain_log(logout);
	}

	if (dump == 1) {
	dumpnat();
	dumpstate();
	dumplookups();
	dumpgroups();
	}

	ipf_deinitialise();

	return 0;
	}


	#if defined(__NetBSD__) \|\| defined(__OpenBSD__) \|\| SOLARIS \|\| \
	(_BSDI_VERSION >= 199701) \|\| (__FreeBSD_version >= 300000) \|\| \
	defined(__osf__) \|\| defined(linux)
	int ipftestioctl(int dev, ioctlcmd_t cmd, ...)
	{
	extern int ipf_interror;
	caddr_t data;
	va_list ap;
	int i;

	va_start(ap, cmd);
	data = va_arg(ap, caddr_t);
	va_end(ap);

	i = ipfioctl(IPL_LOGIPF, cmd, data, FWRITE\|FREAD);
	if (opts & OPT_DEBUG)
	fprintf(stderr, "ipfioctl(IPF,%#x,%p) = %d (%d)\n",
	(u_int)cmd, data, i, ipf_interror);
	if (i != 0) {
	errno = i;
	return -1;
	}
	return 0;
	}


	int ipnattestioctl(int dev, ioctlcmd_t cmd, ...)
	{
	caddr_t data;
	va_list ap;
	int i;

	va_start(ap, cmd);
	data = va_arg(ap, caddr_t);
	va_end(ap);

	i = ipfioctl(IPL_LOGNAT, cmd, data, FWRITE\|FREAD);
	if (opts & OPT_DEBUG)
	fprintf(stderr, "ipfioctl(NAT,%#x,%p) = %d\n",
	(u_int)cmd, data, i);
	if (i != 0) {
	errno = i;
	return -1;
	}
	return 0;
	}


	int ipstatetestioctl(int dev, ioctlcmd_t cmd, ...)
	{
	caddr_t data;
	va_list ap;
	int i;

	va_start(ap, cmd);
	data = va_arg(ap, caddr_t);
	va_end(ap);

	i = ipfioctl(IPL_LOGSTATE, cmd, data, FWRITE\|FREAD);
	if ((opts & OPT_DEBUG) \|\| (i != 0))
	fprintf(stderr, "ipfioctl(STATE,%#x,%p) = %d\n",
	(u_int)cmd, data, i);
	if (i != 0) {
	errno = i;
	return -1;
	}
	return 0;
	}


	int ipauthtestioctl(int dev, ioctlcmd_t cmd, ...)
	{
	caddr_t data;
	va_list ap;
	int i;

	va_start(ap, cmd);
	data = va_arg(ap, caddr_t);
	va_end(ap);

	i = ipfioctl(IPL_LOGAUTH, cmd, data, FWRITE\|FREAD);
	if ((opts & OPT_DEBUG) \|\| (i != 0))
	fprintf(stderr, "ipfioctl(AUTH,%#x,%p) = %d\n",
	(u_int)cmd, data, i);
	if (i != 0) {
	errno = i;
	return -1;
	}
	return 0;
	}


	int ipscantestioctl(int dev, ioctlcmd_t cmd, ...)
	{
	caddr_t data;
	va_list ap;
	int i;

	va_start(ap, cmd);
	data = va_arg(ap, caddr_t);
	va_end(ap);

	i = ipfioctl(IPL_LOGSCAN, cmd, data, FWRITE\|FREAD);
	if ((opts & OPT_DEBUG) \|\| (i != 0))
	fprintf(stderr, "ipfioctl(SCAN,%#x,%p) = %d\n",
	(u_int)cmd, data, i);
	if (i != 0) {
	errno = i;
	return -1;
	}
	return 0;
	}


	int ipsynctestioctl(int dev, ioctlcmd_t cmd, ...)
	{
	caddr_t data;
	va_list ap;
	int i;

	va_start(ap, cmd);
	data = va_arg(ap, caddr_t);
	va_end(ap);

	i = ipfioctl(IPL_LOGSYNC, cmd, data, FWRITE\|FREAD);
	if ((opts & OPT_DEBUG) \|\| (i != 0))
	fprintf(stderr, "ipfioctl(SYNC,%#x,%p) = %d\n",
	(u_int)cmd, data, i);
	if (i != 0) {
	errno = i;
	return -1;
	}
	return 0;
	}


	int ipooltestioctl(int dev, ioctlcmd_t cmd, ...)
	{
	caddr_t data;
	va_list ap;
	int i;

	va_start(ap, cmd);
	data = va_arg(ap, caddr_t);
	va_end(ap);

	i = ipfioctl(IPL_LOGLOOKUP, cmd, data, FWRITE\|FREAD);
	if ((opts & OPT_DEBUG) \|\| (i != 0))
	fprintf(stderr, "ipfioctl(POOL,%#x,%p) = %d\n",
	(u_int)cmd, data, i);
	if (i != 0) {
	errno = i;
	return -1;
	}
	return 0;
	}
	#else
	int ipftestioctl(dev, cmd, data)
	dev_t dev;
	ioctlcmd_t cmd;
	void *data;
	{
	extern int ipf_interror;
	int i;

	i = ipfioctl(IPL_LOGIPF, cmd, data, FWRITE\|FREAD);
	if ((opts & OPT_DEBUG) \|\| (i != 0))
	fprintf(stderr, "ipfioctl(IPF,%#x,%p) = %d (%d)\n", cmd, data, i, ipf_interror);
	if (i != 0) {
	errno = i;
	return -1;
	}
	return 0;
	}


	int ipnattestioctl(dev, cmd, data)
	dev_t dev;
	ioctlcmd_t cmd;
	void *data;
	{
	int i;

	i = ipfioctl(IPL_LOGNAT, cmd, data, FWRITE\|FREAD);
	if ((opts & OPT_DEBUG) \|\| (i != 0))
	fprintf(stderr, "ipfioctl(NAT,%#x,%p) = %d\n", cmd, data, i);
	if (i != 0) {
	errno = i;
	return -1;
	}
	return 0;
	}


	int ipstatetestioctl(dev, cmd, data)
	dev_t dev;
	ioctlcmd_t cmd;
	void *data;
	{
	int i;

	i = ipfioctl(IPL_LOGSTATE, cmd, data, FWRITE\|FREAD);
	if ((opts & OPT_DEBUG) \|\| (i != 0))
	fprintf(stderr, "ipfioctl(STATE,%#x,%p) = %d\n", cmd, data, i);
	if (i != 0) {
	errno = i;
	return -1;
	}
	return 0;
	}


	int ipauthtestioctl(dev, cmd, data)
	dev_t dev;
	ioctlcmd_t cmd;
	void *data;
	{
	int i;

	i = ipfioctl(IPL_LOGAUTH, cmd, data, FWRITE\|FREAD);
	if ((opts & OPT_DEBUG) \|\| (i != 0))
	fprintf(stderr, "ipfioctl(AUTH,%#x,%p) = %d\n", cmd, data, i);
	if (i != 0) {
	errno = i;
	return -1;
	}
	return 0;
	}


	int ipsynctestioctl(dev, cmd, data)
	dev_t dev;
	ioctlcmd_t cmd;
	void *data;
	{
	int i;

	i = ipfioctl(IPL_LOGSYNC, cmd, data, FWRITE\|FREAD);
	if ((opts & OPT_DEBUG) \|\| (i != 0))
	fprintf(stderr, "ipfioctl(SYNC,%#x,%p) = %d\n", cmd, data, i);
	if (i != 0) {
	errno = i;
	return -1;
	}
	return 0;
	}


	int ipscantestioctl(dev, cmd, data)
	dev_t dev;
	ioctlcmd_t cmd;
	void *data;
	{
	int i;

	i = ipfioctl(IPL_LOGSCAN, cmd, data, FWRITE\|FREAD);
	if ((opts & OPT_DEBUG) \|\| (i != 0))
	fprintf(stderr, "ipfioctl(SCAN,%#x,%p) = %d\n", cmd, data, i);
	if (i != 0) {
	errno = i;
	return -1;
	}
	return 0;
	}


	int ipooltestioctl(dev, cmd, data)
	dev_t dev;
	ioctlcmd_t cmd;
	void *data;
	{
	int i;

	i = ipfioctl(IPL_LOGLOOKUP, cmd, data, FWRITE\|FREAD);
	if (opts & OPT_DEBUG)
	fprintf(stderr, "ipfioctl(POOL,%#x,%p) = %d\n", cmd, data, i);
	if (i != 0) {
	errno = i;
	return -1;
	}
	return 0;
	}
	#endif


	int kmemcpy(addr, offset, size)
	char *addr;
	long offset;
	int size;
	{
	bcopy((char *)offset, addr, size);
	return 0;
	}


	int kstrncpy(buf, pos, n)
	char *buf;
	long pos;
	int n;
	{
	char *ptr;

	ptr = (char *)pos;

	while ((n > 0) && (buf++ = ptr++))
	;
	return 0;
	}


	/*
	* Display the built up NAT table rules and mapping entries.
	*/
	void dumpnat()
	{
	hostmap_t *hm;
	ipnat_t *ipn;
	nat_t *nat;

	printf("List of active MAP/Redirect filters:\n");
	for (ipn = ipf_nat_list; ipn != NULL; ipn = ipn->in_next)
	printnat(ipn, opts & (OPT_DEBUG\|OPT_VERBOSE));
	printf("\nList of active sessions:\n");
	for (nat = ipf_nat_instances; nat; nat = nat->nat_next) {
	printactivenat(nat, opts, 0, 0);
	if (nat->nat_aps)
	printaps(nat->nat_aps, opts);
	}

	printf("\nHostmap table:\n");
	for (hm = ipf_hm_maplist; hm != NULL; hm = hm->hm_next)
	printhostmap(hm, hm->hm_hv);
	}


	/*
	* Display the built up state table rules and mapping entries.
	*/
	void dumpstate()
	{
	ipstate_t *ips;

	printf("List of active state sessions:\n");
	for (ips = ipf_state_list; ips != NULL; )
	ips = printstate(ips, opts & (OPT_DEBUG\|OPT_VERBOSE),
	ipf_ticks);
	}


	void dumplookups()
	{
	iphtable_t *iph;
	ip_pool_t *ipl;
	int i;

	printf("List of configured pools\n");
	for (i = 0; i < IPL_LOGSIZE; i++)
	for (ipl = ipf_pool_list[i]; ipl != NULL; ipl = ipl->ipo_next)
	printpool(ipl, bcopywrap, NULL, opts);

	printf("List of configured hash tables\n");
	for (i = 0; i < IPL_LOGSIZE; i++)
	for (iph = ipf_htables[i]; iph != NULL; iph = iph->iph_next)
	printhash(iph, bcopywrap, NULL, opts);
	}


	void dumpgroups()
	{
	frgroup_t *fg;
	int i;

	printf("List of groups configured (set 0)\n");
	for (i = 0; i < IPL_LOGSIZE; i++)
	for (fg = ipf_groups[i][0]; fg != NULL; fg = fg->fg_next) {
	printf("Dev.%d. Group %s Ref %d Flags %#x\n",
	i, fg->fg_name, fg->fg_ref, fg->fg_flags);
	dumprules(fg->fg_start);
	}

	printf("List of groups configured (set 1)\n");
	for (i = 0; i < IPL_LOGSIZE; i++)
	for (fg = ipf_groups[i][1]; fg != NULL; fg = fg->fg_next) {
	printf("Dev.%d. Group %s Ref %d Flags %#x\n",
	i, fg->fg_name, fg->fg_ref, fg->fg_flags);
	dumprules(fg->fg_start);
	}

	printf("Rules configured (set 0, in)\n");
	dumprules(ipf_rules[0][0]);
	printf("Rules configured (set 0, out)\n");
	dumprules(ipf_rules[1][0]);
	printf("Rules configured (set 1, in)\n");
	dumprules(ipf_rules[0][1]);
	printf("Rules configured (set 1, out)\n");
	dumprules(ipf_rules[1][1]);

	printf("Accounting rules configured (set 0, in)\n");
	dumprules(ipf_acct[0][0]);
	printf("Accounting rules configured (set 0, out)\n");
	dumprules(ipf_acct[0][1]);
	printf("Accounting rules configured (set 1, in)\n");
	dumprules(ipf_acct[1][0]);
	printf("Accounting rules configured (set 1, out)\n");
	dumprules(ipf_acct[1][1]);
	}

	void dumprules(rulehead)
	frentry_t *rulehead;
	{
	frentry_t *fr;

	for (fr = rulehead; fr != NULL; fr = fr->fr_next) {
	#ifdef USE_QUAD_T
	printf("%qu ",(unsigned long long)fr->fr_hits);
	#else
	printf("%ld ", fr->fr_hits);
	#endif
	printfr(fr, ipftestioctl);
	}
	}


	void drain_log(filename)
	char *filename;
	{
	char buffer[DEFAULT_IPFLOGSIZE];
	struct iovec iov;
	struct uio uio;
	size_t resid;
	int fd, i;

	fd = open(filename, O_CREAT\|O_TRUNC\|O_WRONLY, 0644);
	if (fd == -1) {
	perror("drain_log:open");
	return;
	}

	for (i = 0; i <= IPL_LOGMAX; i++)
	while (1) {
	bzero((char *)&iov, sizeof(iov));
	iov.iov_base = buffer;
	iov.iov_len = sizeof(buffer);

	bzero((char *)&uio, sizeof(uio));
	uio.uio_iov = &iov;
	uio.uio_iovcnt = 1;
	uio.uio_resid = iov.iov_len;
	resid = uio.uio_resid;

	if (ipf_log_read(i, &uio) == 0) {
	/*
	* If nothing was read then break out.
	*/
	if (uio.uio_resid == resid)
	break;
	write(fd, buffer, resid - uio.uio_resid);
	} else
	break;
	}

	close(fd);
	}


	void fixv4sums(m, ip)
	mb_t *m;
	ip_t *ip;
	{
	u_char csump, hdr;

	ip->ip_sum = 0;
	ip->ip_sum = ipf_cksum((u_short *)ip, IP_HL(ip) << 2);

	csump = (u_char *)ip;
	csump += IP_HL(ip) << 2;

	switch (ip->ip_p)
	{
	case IPPROTO_TCP :
	hdr = csump;
	csump += offsetof(tcphdr_t, th_sum);
	break;
	case IPPROTO_UDP :
	hdr = csump;
	csump += offsetof(udphdr_t, uh_sum);
	break;
	case IPPROTO_ICMP :
	hdr = csump;
	csump += offsetof(icmphdr_t, icmp_cksum);
	break;
	default :
	csump = NULL;
	hdr = NULL;
	break;
	}
	if (hdr != NULL) {
	*csump = 0;
	(u_short )csump = fr_cksum(m, ip, ip->ip_p, hdr,
	ntohs(ip->ip_len));
	}
	}