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-rw-r--r--sys/contrib/ipfilter/netinet/ip_fil.c2293
1 files changed, 0 insertions, 2293 deletions
diff --git a/sys/contrib/ipfilter/netinet/ip_fil.c b/sys/contrib/ipfilter/netinet/ip_fil.c
deleted file mode 100644
index 00e8565..0000000
--- a/sys/contrib/ipfilter/netinet/ip_fil.c
+++ /dev/null
@@ -1,2293 +0,0 @@
-/*
- * Copyright (C) 1993-2001 by Darren Reed.
- *
- * See the IPFILTER.LICENCE file for details on licencing.
- */
-#ifndef SOLARIS
-#define SOLARIS (defined(sun) && (defined(__svr4__) || defined(__SVR4)))
-#endif
-
-#if defined(KERNEL) && !defined(_KERNEL)
-# define _KERNEL
-#endif
-#if defined(_KERNEL) && defined(__FreeBSD_version) && \
- (__FreeBSD_version >= 400000) && !defined(KLD_MODULE)
-#include "opt_inet6.h"
-#endif
-#include <sys/param.h>
-#if defined(__NetBSD__) && (NetBSD >= 199905) && !defined(IPFILTER_LKM) && \
- defined(_KERNEL) && !defined(_LKM)
-# include "opt_ipfilter_log.h"
-#endif
-#if defined(__FreeBSD__) && !defined(__FreeBSD_version)
-# if !defined(_KERNEL) || defined(IPFILTER_LKM)
-# include <osreldate.h>
-# endif
-#endif
-#if defined(__sgi) && (IRIX > 602)
-# define _KMEMUSER
-# include <sys/ptimers.h>
-#endif
-#ifndef _KERNEL
-# include <stdio.h>
-# include <string.h>
-# include <stdlib.h>
-# include <ctype.h>
-# include <fcntl.h>
-#endif
-#include <sys/errno.h>
-#include <sys/types.h>
-#include <sys/file.h>
-#if __FreeBSD_version >= 220000 && defined(_KERNEL)
-# include <sys/fcntl.h>
-# include <sys/filio.h>
-#else
-# include <sys/ioctl.h>
-#endif
-#include <sys/time.h>
-#ifdef _KERNEL
-# include <sys/systm.h>
-#endif
-#if !SOLARIS
-# if (NetBSD > 199609) || (OpenBSD > 199603) || (__FreeBSD_version >= 300000)
-# include <sys/dirent.h>
-# else
-# include <sys/dir.h>
-# endif
-# include <sys/mbuf.h>
-#else
-# include <sys/filio.h>
-#endif
-#include <sys/protosw.h>
-#include <sys/socket.h>
-
-#include <net/if.h>
-#ifdef sun
-# include <net/af.h>
-#endif
-#if __FreeBSD_version >= 300000
-# include <net/if_var.h>
-# if defined(_KERNEL) && !defined(IPFILTER_LKM)
-# include "opt_ipfilter.h"
-# endif
-#endif
-#ifdef __sgi
-#include <sys/debug.h>
-# ifdef IFF_DRVRLOCK /* IRIX6 */
-#include <sys/hashing.h>
-# endif
-#endif
-#include <net/route.h>
-#include <netinet/in.h>
-#if !(defined(__sgi) && !defined(IFF_DRVRLOCK)) /* IRIX < 6 */
-# include <netinet/in_var.h>
-#endif
-#include <netinet/in_systm.h>
-#include <netinet/ip.h>
-#include <netinet/ip_var.h>
-#include <netinet/tcp.h>
-#include <netinet/udp.h>
-#include <netinet/tcpip.h>
-#include <netinet/ip_icmp.h>
-#ifndef _KERNEL
-# include <unistd.h>
-# include <syslog.h>
-#endif
-#include "netinet/ip_compat.h"
-#ifdef USE_INET6
-# include <netinet/icmp6.h>
-# if !SOLARIS
-# include <netinet6/ip6protosw.h>
-# include <netinet6/nd6.h>
-# endif
-#endif
-#include "netinet/ip_fil.h"
-#include "netinet/ip_nat.h"
-#include "netinet/ip_frag.h"
-#include "netinet/ip_state.h"
-#include "netinet/ip_proxy.h"
-#include "netinet/ip_auth.h"
-#if defined(__FreeBSD_version) && (__FreeBSD_version >= 300000)
-# include <sys/malloc.h>
-#endif
-#ifndef MIN
-# define MIN(a,b) (((a)<(b))?(a):(b))
-#endif
-#if !SOLARIS && defined(_KERNEL) && !defined(__sgi)
-# include <sys/kernel.h>
-extern int ip_optcopy __P((struct ip *, struct ip *));
-#endif
-#if defined(OpenBSD) && (OpenBSD >= 200211) && defined(_KERNEL)
-extern int ip6_getpmtu(struct route_in6 *, struct route_in6 *,
- struct ifnet *, struct in6_addr *, u_long *);
-#endif
-
-#if !defined(lint)
-static const char sccsid[] = "@(#)ip_fil.c 2.41 6/5/96 (C) 1993-2000 Darren Reed";
-static const char rcsid[] = "@(#)$Id: ip_fil.c,v 2.42.2.76 2004/05/12 23:21:03 darrenr Exp $";
-#endif
-
-
-extern struct protosw inetsw[];
-
-#ifndef _KERNEL
-# include "ipt.h"
-static struct ifnet **ifneta = NULL;
-static int nifs = 0;
-#else
-# if (BSD < 199306) || defined(__sgi)
-extern int tcp_ttl;
-# endif
-#endif
-
-#ifdef ICMP_UNREACH_FILTER_PROHIB
-int ipl_unreach = ICMP_UNREACH_FILTER_PROHIB;
-#else
-int ipl_unreach = ICMP_UNREACH_FILTER;
-#endif
-u_long ipl_frouteok[2] = {0, 0};
-
-static int frzerostats __P((caddr_t));
-#if defined(__NetBSD__) || defined(__OpenBSD__) || (__FreeBSD_version >= 300003)
-static int frrequest __P((int, u_long, caddr_t, int));
-#else
-static int frrequest __P((int, int, caddr_t, int));
-#endif
-#ifdef _KERNEL
-static int (*fr_savep) __P((ip_t *, int, void *, int, struct mbuf **));
-static int send_ip __P((ip_t *, fr_info_t *, struct mbuf **));
-# ifdef USE_INET6
-static int ipfr_fastroute6 __P((struct mbuf *, struct mbuf **,
- fr_info_t *, frdest_t *));
-# endif
-# ifdef __sgi
-extern int tcp_mtudisc;
-extern kmutex_t ipf_rw;
-extern KRWLOCK_T ipf_mutex;
-# endif
-#else
-void init_ifp __P((void));
-# if defined(__sgi) && (IRIX < 605)
-static int no_output __P((struct ifnet *, struct mbuf *,
- struct sockaddr *));
-static int write_output __P((struct ifnet *, struct mbuf *,
- struct sockaddr *));
-# else
-static int no_output __P((struct ifnet *, struct mbuf *,
- struct sockaddr *, struct rtentry *));
-static int write_output __P((struct ifnet *, struct mbuf *,
- struct sockaddr *, struct rtentry *));
-# endif
-#endif
-int fr_running = 0;
-
-#if (__FreeBSD_version >= 300000) && defined(_KERNEL)
-struct callout_handle ipfr_slowtimer_ch;
-#endif
-#if defined(__NetBSD__) && (__NetBSD_Version__ >= 104230000)
-# include <sys/callout.h>
-struct callout ipfr_slowtimer_ch;
-#endif
-#if defined(__OpenBSD__)
-# include <sys/timeout.h>
-struct timeout ipfr_slowtimer_ch;
-#endif
-#if defined(__sgi) && defined(_KERNEL)
-toid_t ipfr_slowtimer_ch;
-#endif
-
-#if defined(__NetBSD__) && (__NetBSD_Version__ >= 106080000) && \
- defined(_KERNEL)
-# include <sys/conf.h>
-const struct cdevsw ipl_cdevsw = {
- iplopen, iplclose, iplread, nowrite, iplioctl,
- nostop, notty, nopoll, nommap,
-};
-#endif
-
-#if (_BSDI_VERSION >= 199510) && defined(_KERNEL)
-# include <sys/device.h>
-# include <sys/conf.h>
-
-struct cfdriver iplcd = {
- NULL, "ipl", NULL, NULL, DV_DULL, 0
-};
-
-struct devsw iplsw = {
- &iplcd,
- iplopen, iplclose, iplread, nowrite, iplioctl, noselect, nommap,
- nostrat, nodump, nopsize, 0,
- nostop
-};
-#endif /* _BSDI_VERSION >= 199510 && _KERNEL */
-
-#if defined(__NetBSD__) || defined(__OpenBSD__) || (_BSDI_VERSION >= 199701)
-# include <sys/conf.h>
-# if defined(NETBSD_PF)
-# include <net/pfil.h>
-/*
- * We provide the fr_checkp name just to minimize changes later.
- */
-int (*fr_checkp) __P((ip_t *ip, int hlen, void *ifp, int out, mb_t **mp));
-# endif /* NETBSD_PF */
-#endif /* __NetBSD__ */
-
-
-#if defined(__NetBSD_Version__) && (__NetBSD_Version__ >= 105110000) && \
- defined(_KERNEL)
-# include <net/pfil.h>
-
-static int fr_check_wrapper(void *, struct mbuf **, struct ifnet *, int );
-
-static int fr_check_wrapper(arg, mp, ifp, dir)
-void *arg;
-struct mbuf **mp;
-struct ifnet *ifp;
-int dir;
-{
- struct ip *ip = mtod(*mp, struct ip *);
- int rv, hlen = ip->ip_hl << 2;
-
-#if defined(M_CSUM_TCPv4)
- /*
- * If the packet is out-bound, we can't delay checksums
- * here. For in-bound, the checksum has already been
- * validated.
- */
- if (dir == PFIL_OUT) {
- if ((*mp)->m_pkthdr.csum_flags & (M_CSUM_TCPv4|M_CSUM_UDPv4)) {
- in_delayed_cksum(*mp);
- (*mp)->m_pkthdr.csum_flags &=
- ~(M_CSUM_TCPv4|M_CSUM_UDPv4);
- }
- }
-#endif /* M_CSUM_TCPv4 */
-
- /*
- * We get the packet with all fields in network byte
- * order. We expect ip_len and ip_off to be in host
- * order. We frob them, call the filter, then frob
- * them back.
- *
- * Note, we don't need to update the checksum, because
- * it has already been verified.
- */
- NTOHS(ip->ip_len);
- NTOHS(ip->ip_off);
-
- rv = fr_check(ip, hlen, ifp, (dir == PFIL_OUT), mp);
-
- if (rv == 0 && *mp != NULL) {
- ip = mtod(*mp, struct ip *);
- HTONS(ip->ip_len);
- HTONS(ip->ip_off);
- }
-
- return (rv);
-}
-
-# ifdef USE_INET6
-# include <netinet/ip6.h>
-
-static int fr_check_wrapper6(void *, struct mbuf **, struct ifnet *, int );
-
-static int fr_check_wrapper6(arg, mp, ifp, dir)
-void *arg;
-struct mbuf **mp;
-struct ifnet *ifp;
-int dir;
-{
-
- return (fr_check(mtod(*mp, struct ip *), sizeof(struct ip6_hdr),
- ifp, (dir == PFIL_OUT), mp));
-}
-# endif
-#endif /* __NetBSD_Version >= 105110000 && _KERNEL */
-#ifdef _KERNEL
-# if defined(IPFILTER_LKM) && !defined(__sgi)
-int iplidentify(s)
-char *s;
-{
- if (strcmp(s, "ipl") == 0)
- return 1;
- return 0;
-}
-# endif /* IPFILTER_LKM */
-
-
-/*
- * Try to detect the case when compiling for NetBSD with pseudo-device
- */
-# if defined(__NetBSD__) && defined(PFIL_HOOKS)
-void
-ipfilterattach(count)
-int count;
-{
-
- /*
- * Do nothing here, really. The filter will be enabled
- * by the SIOCFRENB ioctl.
- */
-}
-# endif
-
-
-# if defined(__NetBSD__) || defined(__OpenBSD__)
-int ipl_enable()
-# else
-int iplattach()
-# endif
-{
- char *defpass;
- int s;
-# if defined(__sgi) || (defined(NETBSD_PF) && (__NetBSD_Version__ >= 104200000))
- int error = 0;
-# endif
-#if defined(__NetBSD_Version__) && (__NetBSD_Version__ >= 105110000)
- struct pfil_head *ph_inet;
-# ifdef USE_INET6
- struct pfil_head *ph_inet6;
-# endif
-#endif
-
- SPL_NET(s);
- if (fr_running || (fr_checkp == fr_check)) {
- printf("IP Filter: already initialized\n");
- SPL_X(s);
- return EBUSY;
- }
-
-# ifdef IPFILTER_LOG
- ipflog_init();
-# endif
- if (nat_init() == -1) {
- SPL_X(s);
- return EIO;
- }
- if (fr_stateinit() == -1) {
- SPL_X(s);
- return EIO;
- }
- if (appr_init() == -1) {
- SPL_X(s);
- return EIO;
- }
-
-# ifdef NETBSD_PF
-# if (__NetBSD_Version__ >= 104200000) || (__FreeBSD_version >= 500011)
-# if __NetBSD_Version__ >= 105110000
- ph_inet = pfil_head_get(PFIL_TYPE_AF, AF_INET);
-# ifdef USE_INET6
- ph_inet6 = pfil_head_get(PFIL_TYPE_AF, AF_INET6);
-# endif
- if (ph_inet == NULL
-# ifdef USE_INET6
- && ph_inet6 == NULL
-# endif
- )
- return ENODEV;
-
- if (ph_inet != NULL)
- error = pfil_add_hook((void *)fr_check_wrapper, NULL,
- PFIL_IN|PFIL_OUT, ph_inet);
- else
- error = 0;
-# else
- error = pfil_add_hook((void *)fr_check, PFIL_IN|PFIL_OUT,
- &inetsw[ip_protox[IPPROTO_IP]].pr_pfh);
-# endif
- if (error) {
-# ifdef USE_INET6
- goto pfil_error;
-# else
- SPL_X(s);
- appr_unload();
- ip_natunload();
- fr_stateunload();
- return error;
-# endif
- }
-# else
- pfil_add_hook((void *)fr_check, PFIL_IN|PFIL_OUT);
-# endif
-# ifdef USE_INET6
-# if __NetBSD_Version__ >= 105110000
- if (ph_inet6 != NULL)
- error = pfil_add_hook((void *)fr_check_wrapper6, NULL,
- PFIL_IN|PFIL_OUT, ph_inet6);
- else
- error = 0;
- if (error) {
- pfil_remove_hook((void *)fr_check_wrapper6, NULL,
- PFIL_IN|PFIL_OUT, ph_inet6);
-# else
- error = pfil_add_hook((void *)fr_check, PFIL_IN|PFIL_OUT,
- &inet6sw[ip6_protox[IPPROTO_IPV6]].pr_pfh);
- if (error) {
- pfil_remove_hook((void *)fr_check, PFIL_IN|PFIL_OUT,
- &inetsw[ip_protox[IPPROTO_IP]].pr_pfh);
-# endif
-pfil_error:
- SPL_X(s);
- appr_unload();
- ip_natunload();
- fr_stateunload();
- return error;
- }
-# endif
-# endif
-
-# ifdef __sgi
- error = ipfilter_sgi_attach();
- if (error) {
- SPL_X(s);
- appr_unload();
- ip_natunload();
- fr_stateunload();
- return error;
- }
-# endif
-
- bzero((char *)frcache, sizeof(frcache));
- fr_savep = fr_checkp;
- fr_checkp = fr_check;
- fr_running = 1;
-
- SPL_X(s);
- if (fr_pass & FR_PASS)
- defpass = "pass";
- else if (fr_pass & FR_BLOCK)
- defpass = "block";
- else
- defpass = "no-match -> block";
-
- printf("%s initialized. Default = %s all, Logging = %s\n",
- ipfilter_version, defpass,
-# ifdef IPFILTER_LOG
- "enabled");
-# else
- "disabled");
-# endif
-#ifdef _KERNEL
-# if defined(__NetBSD__) && (__NetBSD_Version__ >= 104230000)
- callout_init(&ipfr_slowtimer_ch);
- callout_reset(&ipfr_slowtimer_ch, hz / 2, ipfr_slowtimer, NULL);
-# else
-# if defined(__OpenBSD__)
- timeout_set(&ipfr_slowtimer_ch, ipfr_slowtimer, NULL);
- timeout_add(&ipfr_slowtimer_ch, hz/2);
-# else
-# if (__FreeBSD_version >= 300000) || defined(__sgi)
- ipfr_slowtimer_ch = timeout(ipfr_slowtimer, NULL, hz/2);
-# else
- timeout(ipfr_slowtimer, NULL, hz/2);
-# endif
-# endif
-# endif
-#endif
- return 0;
-}
-
-
-/*
- * Disable the filter by removing the hooks from the IP input/output
- * stream.
- */
-# if defined(__NetBSD__)
-int ipl_disable()
-# else
-int ipldetach()
-# endif
-{
- int s, i;
-#if defined(NETBSD_PF) && \
- ((__NetBSD_Version__ >= 104200000) || (__FreeBSD_version >= 500011))
- int error = 0;
-# if __NetBSD_Version__ >= 105150000
- struct pfil_head *ph_inet = pfil_head_get(PFIL_TYPE_AF, AF_INET);
-# ifdef USE_INET6
- struct pfil_head *ph_inet6 = pfil_head_get(PFIL_TYPE_AF, AF_INET6);
-# endif
-# endif
-#endif
-
-#ifdef _KERNEL
-# if defined(__NetBSD__) && (__NetBSD_Version__ >= 104230000)
- callout_stop(&ipfr_slowtimer_ch);
-# else
-# if (__FreeBSD_version >= 300000)
- untimeout(ipfr_slowtimer, NULL, ipfr_slowtimer_ch);
-# else
-# ifdef __sgi
- untimeout(ipfr_slowtimer_ch);
-# else
-# if defined(__OpenBSD__)
- timeout_del(&ipfr_slowtimer_ch);
-# else
- untimeout(ipfr_slowtimer, NULL);
-# endif /* OpenBSD */
-# endif /* __sgi */
-# endif /* FreeBSD */
-# endif /* NetBSD */
-#endif
- SPL_NET(s);
- if (!fr_running)
- {
- printf("IP Filter: not initialized\n");
- SPL_X(s);
- return 0;
- }
-
- printf("%s unloaded\n", ipfilter_version);
-
- fr_checkp = fr_savep;
- i = frflush(IPL_LOGIPF, 0, FR_INQUE|FR_OUTQUE|FR_INACTIVE);
- i += frflush(IPL_LOGIPF, 0, FR_INQUE|FR_OUTQUE);
- fr_running = 0;
-
-# ifdef NETBSD_PF
-# if ((__NetBSD_Version__ >= 104200000) || (__FreeBSD_version >= 500011))
-# if __NetBSD_Version__ >= 105110000
- if (ph_inet != NULL)
- error = pfil_remove_hook((void *)fr_check_wrapper, NULL,
- PFIL_IN|PFIL_OUT, ph_inet);
- else
- error = 0;
-# else
- error = pfil_remove_hook((void *)fr_check, PFIL_IN|PFIL_OUT,
- &inetsw[ip_protox[IPPROTO_IP]].pr_pfh);
-# endif
- if (error) {
- SPL_X(s);
- return error;
- }
-# else
- pfil_remove_hook((void *)fr_check, PFIL_IN|PFIL_OUT);
-# endif
-# ifdef USE_INET6
-# if __NetBSD_Version__ >= 105110000
- if (ph_inet6 != NULL)
- error = pfil_remove_hook((void *)fr_check_wrapper6, NULL,
- PFIL_IN|PFIL_OUT, ph_inet6);
- else
- error = 0;
-# else
- error = pfil_remove_hook((void *)fr_check, PFIL_IN|PFIL_OUT,
- &inet6sw[ip6_protox[IPPROTO_IPV6]].pr_pfh);
-# endif
- if (error) {
- SPL_X(s);
- return error;
- }
-# endif
-# endif
-
-# ifdef __sgi
- ipfilter_sgi_detach();
-# endif
-
- appr_unload();
- ipfr_unload();
- ip_natunload();
- fr_stateunload();
- fr_authunload();
-
- SPL_X(s);
- return 0;
-}
-#endif /* _KERNEL */
-
-
-static int frzerostats(data)
-caddr_t data;
-{
- friostat_t fio;
- int error;
-
- fr_getstat(&fio);
- error = IWCOPYPTR((caddr_t)&fio, data, sizeof(fio));
- if (error)
- return EFAULT;
-
- bzero((char *)frstats, sizeof(*frstats) * 2);
-
- return 0;
-}
-
-
-/*
- * Filter ioctl interface.
- */
-#ifdef __sgi
-int IPL_EXTERN(ioctl)(dev_t dev, int cmd, caddr_t data, int mode
-# ifdef _KERNEL
- , cred_t *cp, int *rp
-# endif
-)
-#else
-int IPL_EXTERN(ioctl)(dev, cmd, data, mode
-# if (defined(_KERNEL) && ((_BSDI_VERSION >= 199510) || (BSD >= 199506) || \
- (NetBSD >= 199511) || (__FreeBSD_version >= 220000) || \
- defined(__OpenBSD__)))
-, p)
-struct proc *p;
-# else
-)
-# endif
-dev_t dev;
-# if defined(__NetBSD__) || defined(__OpenBSD__) || \
- (_BSDI_VERSION >= 199701) || (__FreeBSD_version >= 300000)
-u_long cmd;
-# else
-int cmd;
-# endif
-caddr_t data;
-int mode;
-#endif /* __sgi */
-{
-#if defined(_KERNEL) && !SOLARIS
- int s;
-#endif
- int error = 0, unit = 0, tmp;
-
-#if (BSD >= 199306) && defined(_KERNEL)
- if ((securelevel >= 3) && (mode & FWRITE))
- return EPERM;
-#endif
-#ifdef _KERNEL
- unit = GET_MINOR(dev);
- if ((IPL_LOGMAX < unit) || (unit < 0))
- return ENXIO;
-#else
- unit = dev;
-#endif
-
- if (fr_running == 0 && (cmd != SIOCFRENB || unit != IPL_LOGIPF))
- return ENODEV;
-
- SPL_NET(s);
-
- if (unit == IPL_LOGNAT) {
- if (fr_running)
- error = nat_ioctl(data, cmd, mode);
- else
- error = EIO;
- SPL_X(s);
- return error;
- }
- if (unit == IPL_LOGSTATE) {
- if (fr_running)
- error = fr_state_ioctl(data, cmd, mode);
- else
- error = EIO;
- SPL_X(s);
- return error;
- }
- if (unit == IPL_LOGAUTH) {
- if (!fr_running)
- error = EIO;
- else
- if ((cmd == SIOCADAFR) || (cmd == SIOCRMAFR)) {
- if (!(mode & FWRITE)) {
- error = EPERM;
- } else {
- error = frrequest(unit, cmd, data,
- fr_active);
- }
- } else {
- error = fr_auth_ioctl(data, mode, cmd);
- }
- SPL_X(s);
- return error;
- }
-
- switch (cmd) {
- case FIONREAD :
-#ifdef IPFILTER_LOG
- error = IWCOPY((caddr_t)&iplused[IPL_LOGIPF], (caddr_t)data,
- sizeof(iplused[IPL_LOGIPF]));
-#endif
- break;
-#if (!defined(IPFILTER_LKM) || defined(__NetBSD__)) && defined(_KERNEL)
- case SIOCFRENB :
- {
- u_int enable;
-
- if (!(mode & FWRITE))
- error = EPERM;
- else {
- error = IRCOPY(data, (caddr_t)&enable, sizeof(enable));
- if (error)
- break;
- if (enable)
-# if defined(__NetBSD__) || defined(__OpenBSD__)
- error = ipl_enable();
-# else
- error = iplattach();
-# endif
- else
-# if defined(__NetBSD__)
- error = ipl_disable();
-# else
- error = ipldetach();
-# endif
- }
- break;
- }
-#endif
- case SIOCSETFF :
- if (!(mode & FWRITE))
- error = EPERM;
- else
- error = IRCOPY(data, (caddr_t)&fr_flags,
- sizeof(fr_flags));
- break;
- case SIOCGETFF :
- error = IWCOPY((caddr_t)&fr_flags, data, sizeof(fr_flags));
- break;
- case SIOCINAFR :
- case SIOCRMAFR :
- case SIOCADAFR :
- case SIOCZRLST :
- if (!(mode & FWRITE))
- error = EPERM;
- else
- error = frrequest(unit, cmd, data, fr_active);
- break;
- case SIOCINIFR :
- case SIOCRMIFR :
- case SIOCADIFR :
- if (!(mode & FWRITE))
- error = EPERM;
- else
- error = frrequest(unit, cmd, data, 1 - fr_active);
- break;
- case SIOCSWAPA :
- if (!(mode & FWRITE))
- error = EPERM;
- else {
- bzero((char *)frcache, sizeof(frcache[0]) * 2);
- *(u_int *)data = fr_active;
- fr_active = 1 - fr_active;
- }
- break;
- case SIOCGETFS :
- {
- friostat_t fio;
-
- fr_getstat(&fio);
- error = IWCOPYPTR((caddr_t)&fio, data, sizeof(fio));
- if (error)
- error = EFAULT;
- break;
- }
- case SIOCFRZST :
- if (!(mode & FWRITE))
- error = EPERM;
- else
- error = frzerostats(data);
- break;
- case SIOCIPFFL :
- if (!(mode & FWRITE))
- error = EPERM;
- else {
- error = IRCOPY(data, (caddr_t)&tmp, sizeof(tmp));
- if (!error) {
- tmp = frflush(unit, 4, tmp);
- error = IWCOPY((caddr_t)&tmp, data,
- sizeof(tmp));
- }
- }
- break;
-#ifdef USE_INET6
- case SIOCIPFL6 :
- if (!(mode & FWRITE))
- error = EPERM;
- else {
- error = IRCOPY(data, (caddr_t)&tmp, sizeof(tmp));
- if (!error) {
- tmp = frflush(unit, 6, tmp);
- error = IWCOPY((caddr_t)&tmp, data,
- sizeof(tmp));
- }
- }
- break;
-#endif
- case SIOCSTLCK :
- error = IRCOPY(data, (caddr_t)&tmp, sizeof(tmp));
- if (!error) {
- fr_state_lock = tmp;
- fr_nat_lock = tmp;
- fr_frag_lock = tmp;
- fr_auth_lock = tmp;
- } else
- error = EFAULT;
- break;
-#ifdef IPFILTER_LOG
- case SIOCIPFFB :
- if (!(mode & FWRITE))
- error = EPERM;
- else
- *(int *)data = ipflog_clear(unit);
- break;
-#endif /* IPFILTER_LOG */
- case SIOCGFRST :
- error = IWCOPYPTR((caddr_t)ipfr_fragstats(), data,
- sizeof(ipfrstat_t));
- if (error)
- error = EFAULT;
- break;
- case SIOCFRSYN :
- if (!(mode & FWRITE))
- error = EPERM;
- else {
-#if defined(_KERNEL) && defined(__sgi)
- ipfsync();
-#endif
- frsync();
- }
- break;
- default :
- error = EINVAL;
- break;
- }
- SPL_X(s);
- return error;
-}
-
-
-void fr_forgetifp(ifp)
-void *ifp;
-{
- register frentry_t *f;
-
- WRITE_ENTER(&ipf_mutex);
- for (f = ipacct[0][fr_active]; (f != NULL); f = f->fr_next)
- if (f->fr_ifa == ifp)
- f->fr_ifa = (void *)-1;
- for (f = ipacct[1][fr_active]; (f != NULL); f = f->fr_next)
- if (f->fr_ifa == ifp)
- f->fr_ifa = (void *)-1;
- for (f = ipfilter[0][fr_active]; (f != NULL); f = f->fr_next)
- if (f->fr_ifa == ifp)
- f->fr_ifa = (void *)-1;
- for (f = ipfilter[1][fr_active]; (f != NULL); f = f->fr_next)
- if (f->fr_ifa == ifp)
- f->fr_ifa = (void *)-1;
-#ifdef USE_INET6
- for (f = ipacct6[0][fr_active]; (f != NULL); f = f->fr_next)
- if (f->fr_ifa == ifp)
- f->fr_ifa = (void *)-1;
- for (f = ipacct6[1][fr_active]; (f != NULL); f = f->fr_next)
- if (f->fr_ifa == ifp)
- f->fr_ifa = (void *)-1;
- for (f = ipfilter6[0][fr_active]; (f != NULL); f = f->fr_next)
- if (f->fr_ifa == ifp)
- f->fr_ifa = (void *)-1;
- for (f = ipfilter6[1][fr_active]; (f != NULL); f = f->fr_next)
- if (f->fr_ifa == ifp)
- f->fr_ifa = (void *)-1;
-#endif
- RWLOCK_EXIT(&ipf_mutex);
- ip_natsync(ifp);
-}
-
-
-static int frrequest(unit, req, data, set)
-int unit;
-#if defined(__NetBSD__) || defined(__OpenBSD__) || (__FreeBSD_version >= 300003)
-u_long req;
-#else
-int req;
-#endif
-int set;
-caddr_t data;
-{
- register frentry_t *fp, *f, **fprev;
- register frentry_t **ftail;
- frgroup_t *fg = NULL;
- int error = 0, in, i;
- u_int *p, *pp;
- frentry_t frd;
- frdest_t *fdp;
- u_int group;
-
- fp = &frd;
- error = IRCOPYPTR(data, (caddr_t)fp, sizeof(*fp));
- if (error)
- return EFAULT;
- fp->fr_ref = 0;
-#if (BSD >= 199306) && defined(_KERNEL)
- if ((securelevel > 0) && (fp->fr_func != NULL))
- return EPERM;
-#endif
-
- /*
- * Check that the group number does exist and that if a head group
- * has been specified, doesn't exist.
- */
- if ((req != SIOCZRLST) && ((req == SIOCINAFR) || (req == SIOCINIFR) ||
- (req == SIOCADAFR) || (req == SIOCADIFR)) && fp->fr_grhead &&
- fr_findgroup((u_int)fp->fr_grhead, fp->fr_flags, unit, set, NULL))
- return EEXIST;
- if ((req != SIOCZRLST) && fp->fr_group &&
- !fr_findgroup((u_int)fp->fr_group, fp->fr_flags, unit, set, NULL))
- return ESRCH;
-
- in = (fp->fr_flags & FR_INQUE) ? 0 : 1;
-
- if (unit == IPL_LOGAUTH)
- ftail = fprev = &ipauth;
- else if ((fp->fr_flags & FR_ACCOUNT) && (fp->fr_v == 4))
- ftail = fprev = &ipacct[in][set];
- else if ((fp->fr_flags & (FR_OUTQUE|FR_INQUE)) && (fp->fr_v == 4))
- ftail = fprev = &ipfilter[in][set];
-#ifdef USE_INET6
- else if ((fp->fr_flags & FR_ACCOUNT) && (fp->fr_v == 6))
- ftail = fprev = &ipacct6[in][set];
- else if ((fp->fr_flags & (FR_OUTQUE|FR_INQUE)) && (fp->fr_v == 6))
- ftail = fprev = &ipfilter6[in][set];
-#endif
- else
- return ESRCH;
-
- if ((group = fp->fr_group)) {
- if (!(fg = fr_findgroup(group, fp->fr_flags, unit, set, NULL)))
- return ESRCH;
- ftail = fprev = fg->fg_start;
- }
-
- bzero((char *)frcache, sizeof(frcache[0]) * 2);
-
- for (i = 0; i < 4; i++) {
- if ((fp->fr_ifnames[i][1] == '\0') &&
- ((fp->fr_ifnames[i][0] == '-') ||
- (fp->fr_ifnames[i][0] == '*'))) {
- fp->fr_ifas[i] = NULL;
- } else if (*fp->fr_ifnames[i]) {
- fp->fr_ifas[i] = GETUNIT(fp->fr_ifnames[i], fp->fr_v);
- if (!fp->fr_ifas[i])
- fp->fr_ifas[i] = (void *)-1;
- }
- }
-
- fdp = &fp->fr_dif;
- fp->fr_flags &= ~FR_DUP;
- if (*fdp->fd_ifname) {
- fdp->fd_ifp = GETUNIT(fdp->fd_ifname, fp->fr_v);
- if (!fdp->fd_ifp)
- fdp->fd_ifp = (struct ifnet *)-1;
- else
- fp->fr_flags |= FR_DUP;
- }
-
- fdp = &fp->fr_tif;
- if (*fdp->fd_ifname) {
- fdp->fd_ifp = GETUNIT(fdp->fd_ifname, fp->fr_v);
- if (!fdp->fd_ifp)
- fdp->fd_ifp = (struct ifnet *)-1;
- }
-
- /*
- * Look for a matching filter rule, but don't include the next or
- * interface pointer in the comparison (fr_next, fr_ifa).
- */
- for (fp->fr_cksum = 0, p = (u_int *)&fp->fr_ip, pp = &fp->fr_cksum;
- p < pp; p++)
- fp->fr_cksum += *p;
-
- for (; (f = *ftail); ftail = &f->fr_next)
- if ((fp->fr_cksum == f->fr_cksum) &&
- !bcmp((char *)&f->fr_ip, (char *)&fp->fr_ip, FR_CMPSIZ))
- break;
-
- /*
- * If zero'ing statistics, copy current to caller and zero.
- */
- if (req == SIOCZRLST) {
- if (!f)
- return ESRCH;
- error = IWCOPYPTR((caddr_t)f, data, sizeof(*f));
- if (error)
- return EFAULT;
- f->fr_hits = 0;
- f->fr_bytes = 0;
- return 0;
- }
-
- if (!f) {
- if (req != SIOCINAFR && req != SIOCINIFR)
- while ((f = *ftail))
- ftail = &f->fr_next;
- else {
- ftail = fprev;
- if (fp->fr_hits) {
- while (--fp->fr_hits && (f = *ftail))
- ftail = &f->fr_next;
- }
- f = NULL;
- }
- }
-
- if (req == SIOCRMAFR || req == SIOCRMIFR) {
- if (!f)
- error = ESRCH;
- else {
- /*
- * Only return EBUSY if there is a group list, else
- * it's probably just state information referencing
- * the rule.
- */
- if ((f->fr_ref > 1) && f->fr_grp)
- return EBUSY;
- if (fg && fg->fg_head)
- fg->fg_head->fr_ref--;
- if (unit == IPL_LOGAUTH) {
- return fr_preauthcmd(req, f, ftail);
- }
- if (f->fr_grhead)
- fr_delgroup((u_int)f->fr_grhead, fp->fr_flags,
- unit, set);
- fixskip(fprev, f, -1);
- *ftail = f->fr_next;
- f->fr_next = NULL;
- f->fr_ref--;
- if (f->fr_ref == 0)
- KFREE(f);
- }
- } else {
- if (f)
- error = EEXIST;
- else {
- if (unit == IPL_LOGAUTH) {
- return fr_preauthcmd(req, fp, ftail);
- }
- KMALLOC(f, frentry_t *);
- if (f != NULL) {
- if (fg && fg->fg_head)
- fg->fg_head->fr_ref++;
- bcopy((char *)fp, (char *)f, sizeof(*f));
- f->fr_ref = 1;
- f->fr_hits = 0;
- f->fr_next = *ftail;
- *ftail = f;
- if (req == SIOCINIFR || req == SIOCINAFR)
- fixskip(fprev, f, 1);
- f->fr_grp = NULL;
- if ((group = f->fr_grhead))
- fg = fr_addgroup(group, f, unit, set);
- } else
- error = ENOMEM;
- }
- }
- return (error);
-}
-
-
-#ifdef _KERNEL
-/*
- * routines below for saving IP headers to buffer
- */
-# ifdef __sgi
-# ifdef _KERNEL
-int IPL_EXTERN(open)(dev_t *pdev, int flags, int devtype, cred_t *cp)
-# else
-int IPL_EXTERN(open)(dev_t dev, int flags)
-# endif
-# else
-int IPL_EXTERN(open)(dev, flags
-# if ((_BSDI_VERSION >= 199510) || (BSD >= 199506) || (NetBSD >= 199511) || \
- (__FreeBSD_version >= 220000) || defined(__OpenBSD__)) && defined(_KERNEL)
-, devtype, p)
-int devtype;
-struct proc *p;
-# else
-)
-# endif
-dev_t dev;
-int flags;
-# endif /* __sgi */
-{
-# if defined(__sgi) && defined(_KERNEL)
- u_int min = geteminor(*pdev);
-# else
- u_int min = GET_MINOR(dev);
-# endif
-
- if (IPL_LOGMAX < min)
- min = ENXIO;
- else
- min = 0;
- return min;
-}
-
-
-# ifdef __sgi
-int IPL_EXTERN(close)(dev_t dev, int flags, int devtype, cred_t *cp)
-#else
-int IPL_EXTERN(close)(dev, flags
-# if ((_BSDI_VERSION >= 199510) || (BSD >= 199506) || (NetBSD >= 199511) || \
- (__FreeBSD_version >= 220000) || defined(__OpenBSD__)) && defined(_KERNEL)
-, devtype, p)
-int devtype;
-struct proc *p;
-# else
-)
-# endif
-dev_t dev;
-int flags;
-# endif /* __sgi */
-{
- u_int min = GET_MINOR(dev);
-
- if (IPL_LOGMAX < min)
- min = ENXIO;
- else
- min = 0;
- return min;
-}
-
-/*
- * iplread/ipllog
- * both of these must operate with at least splnet() lest they be
- * called during packet processing and cause an inconsistancy to appear in
- * the filter lists.
- */
-# ifdef __sgi
-int IPL_EXTERN(read)(dev_t dev, uio_t *uio, cred_t *crp)
-# else
-# if BSD >= 199306
-int IPL_EXTERN(read)(dev, uio, ioflag)
-int ioflag;
-# else
-int IPL_EXTERN(read)(dev, uio)
-# endif
-dev_t dev;
-register struct uio *uio;
-# endif /* __sgi */
-{
-# ifdef IPFILTER_LOG
- return ipflog_read(GET_MINOR(dev), uio);
-# else
- return ENXIO;
-# endif
-}
-
-
-/*
- * send_reset - this could conceivably be a call to tcp_respond(), but that
- * requires a large amount of setting up and isn't any more efficient.
- */
-int send_reset(oip, fin)
-struct ip *oip;
-fr_info_t *fin;
-{
- struct tcphdr *tcp, *tcp2;
- int tlen = 0, hlen;
- struct mbuf *m;
-#ifdef USE_INET6
- ip6_t *ip6, *oip6 = (ip6_t *)oip;
-#endif
- ip_t *ip;
-
- tcp = (struct tcphdr *)fin->fin_dp;
- if (tcp->th_flags & TH_RST)
- return -1; /* feedback loop */
-# if (BSD < 199306) || defined(__sgi)
- m = m_get(M_DONTWAIT, MT_HEADER);
-# else
- m = m_gethdr(M_DONTWAIT, MT_HEADER);
-# endif
- if (m == NULL)
- return ENOBUFS;
- if (m == NULL)
- return -1;
-
- tlen = fin->fin_dlen - (tcp->th_off << 2) +
- ((tcp->th_flags & TH_SYN) ? 1 : 0) +
- ((tcp->th_flags & TH_FIN) ? 1 : 0);
-
-#ifdef USE_INET6
- hlen = (fin->fin_v == 6) ? sizeof(ip6_t) : sizeof(ip_t);
-#else
- hlen = sizeof(ip_t);
-#endif
- m->m_len = sizeof(*tcp2) + hlen;
-# if BSD >= 199306
- m->m_data += max_linkhdr;
- m->m_pkthdr.len = m->m_len;
- m->m_pkthdr.rcvif = (struct ifnet *)0;
-# endif
- ip = mtod(m, struct ip *);
-# ifdef USE_INET6
- ip6 = (ip6_t *)ip;
-# endif
- bzero((char *)ip, sizeof(*tcp2) + hlen);
- tcp2 = (struct tcphdr *)((char *)ip + hlen);
-
- tcp2->th_sport = tcp->th_dport;
- tcp2->th_dport = tcp->th_sport;
- if (tcp->th_flags & TH_ACK) {
- tcp2->th_seq = tcp->th_ack;
- tcp2->th_flags = TH_RST;
- } else {
- tcp2->th_ack = ntohl(tcp->th_seq);
- tcp2->th_ack += tlen;
- tcp2->th_ack = htonl(tcp2->th_ack);
- tcp2->th_flags = TH_RST|TH_ACK;
- }
- tcp2->th_off = sizeof(*tcp2) >> 2;
-# ifdef USE_INET6
- if (fin->fin_v == 6) {
- ip6->ip6_plen = htons(sizeof(struct tcphdr));
- ip6->ip6_nxt = IPPROTO_TCP;
- ip6->ip6_src = oip6->ip6_dst;
- ip6->ip6_dst = oip6->ip6_src;
- tcp2->th_sum = in6_cksum(m, IPPROTO_TCP,
- sizeof(*ip6), sizeof(*tcp2));
- return send_ip(oip, fin, &m);
- }
-# endif
- ip->ip_p = IPPROTO_TCP;
- ip->ip_len = htons(sizeof(struct tcphdr));
- ip->ip_src.s_addr = oip->ip_dst.s_addr;
- ip->ip_dst.s_addr = oip->ip_src.s_addr;
- tcp2->th_sum = in_cksum(m, hlen + sizeof(*tcp2));
- ip->ip_len = hlen + sizeof(*tcp2);
- return send_ip(oip, fin, &m);
-}
-
-
-/*
- * Send an IP(v4/v6) datagram out into the network
- */
-static int send_ip(oip, fin, mp)
-ip_t *oip;
-fr_info_t *fin;
-struct mbuf **mp;
-{
- struct mbuf *m = *mp;
- int error, hlen;
- fr_info_t frn;
- ip_t *ip;
-
- bzero((char *)&frn, sizeof(frn));
- frn.fin_ifp = fin->fin_ifp;
- frn.fin_v = fin->fin_v;
- frn.fin_out = fin->fin_out;
- frn.fin_mp = mp;
-
- ip = mtod(m, ip_t *);
- hlen = sizeof(*ip);
-
- ip->ip_v = fin->fin_v;
- if (ip->ip_v == 4) {
- ip->ip_hl = (sizeof(*oip) >> 2);
- ip->ip_v = IPVERSION;
- ip->ip_tos = oip->ip_tos;
- ip->ip_id = oip->ip_id;
-
-# if defined(__NetBSD__) || \
- (defined(__OpenBSD__) && (OpenBSD >= 200012))
- if (ip_mtudisc != 0)
- ip->ip_off = IP_DF;
-# else
-# if defined(__sgi)
- if (ip->ip_p == IPPROTO_TCP && tcp_mtudisc != 0)
- ip->ip_off = IP_DF;
-# endif
-# endif
-
-# if (BSD < 199306) || defined(__sgi)
- ip->ip_ttl = tcp_ttl;
-# else
- ip->ip_ttl = ip_defttl;
-# endif
- ip->ip_sum = 0;
- frn.fin_dp = (char *)(ip + 1);
- }
-# ifdef USE_INET6
- else if (ip->ip_v == 6) {
- ip6_t *ip6 = (ip6_t *)ip;
-
- hlen = sizeof(*ip6);
- ip6->ip6_hlim = 127;
- frn.fin_dp = (char *)(ip6 + 1);
- }
-# endif
-# ifdef IPSEC
- m->m_pkthdr.rcvif = NULL;
-# endif
-
- if (fr_makefrip(hlen, ip, &frn) == 0)
- error = ipfr_fastroute(m, mp, &frn, NULL);
- else
- error = EINVAL;
- return error;
-}
-
-
-int send_icmp_err(oip, type, fin, dst)
-ip_t *oip;
-int type;
-fr_info_t *fin;
-int dst;
-{
- int err, hlen = 0, xtra = 0, iclen, ohlen = 0, avail, code;
- u_short shlen, slen = 0, soff = 0;
- struct in_addr dst4;
- struct icmp *icmp;
- struct mbuf *m;
- void *ifp;
-#ifdef USE_INET6
- ip6_t *ip6, *oip6 = (ip6_t *)oip;
- struct in6_addr dst6;
-#endif
- ip_t *ip;
-
- if ((type < 0) || (type > ICMP_MAXTYPE))
- return -1;
-
- code = fin->fin_icode;
-#ifdef USE_INET6
- if ((code < 0) || (code > sizeof(icmptoicmp6unreach)/sizeof(int)))
- return -1;
-#endif
-
- avail = 0;
- m = NULL;
- ifp = fin->fin_ifp;
- if (fin->fin_v == 4) {
- if ((oip->ip_p == IPPROTO_ICMP) &&
- !(fin->fin_fi.fi_fl & FI_SHORT))
- switch (ntohs(fin->fin_data[0]) >> 8)
- {
- case ICMP_ECHO :
- case ICMP_TSTAMP :
- case ICMP_IREQ :
- case ICMP_MASKREQ :
- break;
- default :
- return 0;
- }
-
-# if (BSD < 199306) || defined(__sgi)
- avail = MLEN;
- m = m_get(M_DONTWAIT, MT_HEADER);
-# else
- avail = MHLEN;
- m = m_gethdr(M_DONTWAIT, MT_HEADER);
-# endif
- if (m == NULL)
- return ENOBUFS;
-
- if (dst == 0) {
- if (fr_ifpaddr(4, ifp, &dst4) == -1)
- return -1;
- } else
- dst4.s_addr = oip->ip_dst.s_addr;
-
- hlen = sizeof(ip_t);
- ohlen = oip->ip_hl << 2;
- xtra = 8;
- }
-
-#ifdef USE_INET6
- else if (fin->fin_v == 6) {
- hlen = sizeof(ip6_t);
- ohlen = sizeof(ip6_t);
- type = icmptoicmp6types[type];
- if (type == ICMP6_DST_UNREACH)
- code = icmptoicmp6unreach[code];
-
- MGETHDR(m, M_DONTWAIT, MT_HEADER);
- if (!m)
- return ENOBUFS;
-
- MCLGET(m, M_DONTWAIT);
- if ((m->m_flags & M_EXT) == 0) {
- m_freem(m);
- return ENOBUFS;
- }
-# ifdef M_TRAILINGSPACE
- m->m_len = 0;
- avail = M_TRAILINGSPACE(m);
-# else
- avail = (m->m_flags & M_EXT) ? MCLBYTES : MHLEN;
-# endif
- xtra = MIN(ntohs(oip6->ip6_plen) + sizeof(ip6_t),
- avail - hlen - sizeof(*icmp) - max_linkhdr);
- if (dst == 0) {
- if (fr_ifpaddr(6, ifp, (struct in_addr *)&dst6) == -1)
- return -1;
- } else
- dst6 = oip6->ip6_dst;
- }
-#endif
-
- iclen = hlen + sizeof(*icmp);
-# if BSD >= 199306
- avail -= (max_linkhdr + iclen);
- m->m_data += max_linkhdr;
- m->m_pkthdr.rcvif = (struct ifnet *)0;
- if (xtra > avail)
- xtra = avail;
- iclen += xtra;
- m->m_pkthdr.len = iclen;
-#else
- avail -= (m->m_off + iclen);
- if (xtra > avail)
- xtra = avail;
- iclen += xtra;
-#endif
- m->m_len = iclen;
- ip = mtod(m, ip_t *);
- icmp = (struct icmp *)((char *)ip + hlen);
- bzero((char *)ip, iclen);
-
- icmp->icmp_type = type;
- icmp->icmp_code = fin->fin_icode;
- icmp->icmp_cksum = 0;
-#ifdef icmp_nextmtu
- if (type == ICMP_UNREACH &&
- fin->fin_icode == ICMP_UNREACH_NEEDFRAG && ifp)
- icmp->icmp_nextmtu = htons(((struct ifnet *) ifp)->if_mtu);
-#endif
-
- if (avail) {
- slen = oip->ip_len;
- oip->ip_len = htons(oip->ip_len);
- soff = oip->ip_off;
- oip->ip_off = htons(oip->ip_off);
- bcopy((char *)oip, (char *)&icmp->icmp_ip, MIN(ohlen, avail));
- oip->ip_len = slen;
- oip->ip_off = soff;
- avail -= MIN(ohlen, avail);
- }
-
-#ifdef USE_INET6
- ip6 = (ip6_t *)ip;
- if (fin->fin_v == 6) {
- ip6->ip6_flow = 0;
- ip6->ip6_plen = htons(iclen - hlen);
- ip6->ip6_nxt = IPPROTO_ICMPV6;
- ip6->ip6_hlim = 0;
- ip6->ip6_src = dst6;
- ip6->ip6_dst = oip6->ip6_src;
- if (avail)
- bcopy((char *)oip + ohlen,
- (char *)&icmp->icmp_ip + ohlen, avail);
- icmp->icmp_cksum = in6_cksum(m, IPPROTO_ICMPV6,
- sizeof(*ip6), iclen - hlen);
- } else
-#endif
- {
-
- ip->ip_src.s_addr = dst4.s_addr;
- ip->ip_dst.s_addr = oip->ip_src.s_addr;
-
- if (avail > 8)
- avail = 8;
- if (avail)
- bcopy((char *)oip + ohlen,
- (char *)&icmp->icmp_ip + ohlen, avail);
- icmp->icmp_cksum = ipf_cksum((u_short *)icmp,
- sizeof(*icmp) + 8);
- ip->ip_len = iclen;
- ip->ip_p = IPPROTO_ICMP;
- }
-
- shlen = fin->fin_hlen;
- fin->fin_hlen = hlen;
- err = send_ip(oip, fin, &m);
- fin->fin_hlen = shlen;
-
- return err;
-}
-
-
-# if !defined(IPFILTER_LKM) && !defined(__sgi) && \
- (!defined(__FreeBSD_version) || (__FreeBSD_version < 300000))
-# if (BSD < 199306)
-int iplinit __P((void));
-
-int
-# else
-void iplinit __P((void));
-
-void
-# endif
-iplinit()
-{
-
-# if defined(__NetBSD__) || defined(__OpenBSD__)
- if (ipl_enable() != 0)
-# else
- if (iplattach() != 0)
-# endif
- {
- printf("IP Filter failed to attach\n");
- }
- ip_init();
-}
-# endif /* ! __NetBSD__ */
-
-
-/*
- * Return the length of the entire mbuf.
- */
-size_t mbufchainlen(m0)
-register struct mbuf *m0;
-{
-#if BSD >= 199306
- return m0->m_pkthdr.len;
-#else
- register size_t len = 0;
-
- for (; m0; m0 = m0->m_next)
- len += m0->m_len;
- return len;
-#endif
-}
-
-
-int ipfr_fastroute(m0, mpp, fin, fdp)
-struct mbuf *m0, **mpp;
-fr_info_t *fin;
-frdest_t *fdp;
-{
- register struct ip *ip, *mhip;
- register struct mbuf *m = m0;
- register struct route *ro;
- int len, off, error = 0, hlen, code, sout;
- struct ifnet *ifp, *sifp;
- struct sockaddr_in *dst;
- struct route iproute;
- frentry_t *fr;
-
- ip = NULL;
- ro = NULL;
- ifp = NULL;
- ro = &iproute;
- ro->ro_rt = NULL;
-
-#ifdef USE_INET6
- if (fin->fin_v == 6) {
- error = ipfr_fastroute6(m0, mpp, fin, fdp);
- if (error != 0)
- goto bad;
- goto done;
- }
-#else
- if (fin->fin_v == 6)
- goto bad;
-#endif
-
-#ifdef M_WRITABLE
- /*
- * HOT FIX/KLUDGE:
- *
- * If the mbuf we're about to send is not writable (because of
- * a cluster reference, for example) we'll need to make a copy
- * of it since this routine modifies the contents.
- *
- * If you have non-crappy network hardware that can transmit data
- * from the mbuf, rather than making a copy, this is gonna be a
- * problem.
- */
- if (M_WRITABLE(m) == 0) {
- if ((m0 = m_dup(m, M_DONTWAIT)) != NULL) {
- m_freem(*mpp);
- *mpp = m0;
- m = m0;
- } else {
- error = ENOBUFS;
- m_freem(*mpp);
- goto done;
- }
- }
-#endif
-
- hlen = fin->fin_hlen;
- ip = mtod(m0, struct ip *);
-
-#if defined(__NetBSD__) && defined(M_CSUM_IPv4)
- /*
- * Clear any in-bound checksum flags for this packet.
- */
-# if (__NetBSD_Version__ > 105009999)
- m0->m_pkthdr.csum_flags = 0;
-# else
- m0->m_pkthdr.csuminfo = 0;
-# endif
-#endif /* __NetBSD__ && M_CSUM_IPv4 */
-
- /*
- * Route packet.
- */
-#if (defined(IRIX) && (IRIX >= 605))
- ROUTE_RDLOCK();
-#endif
- bzero((caddr_t)ro, sizeof (*ro));
- dst = (struct sockaddr_in *)&ro->ro_dst;
- dst->sin_family = AF_INET;
- dst->sin_addr = ip->ip_dst;
-
- fr = fin->fin_fr;
- if (fdp != NULL)
- ifp = fdp->fd_ifp;
- else
- ifp = fin->fin_ifp;
-
- /*
- * In case we're here due to "to <if>" being used with "keep state",
- * check that we're going in the correct direction.
- */
- if ((fr != NULL) && (fin->fin_rev != 0)) {
- if ((ifp != NULL) && (fdp == &fr->fr_tif)) {
-# if (defined(IRIX) && (IRIX >= 605))
- ROUTE_UNLOCK();
-# endif
- return 0;
- }
- } else if (fdp != NULL) {
- if (fdp->fd_ip.s_addr != 0)
- dst->sin_addr = fdp->fd_ip;
- }
-
-# if BSD >= 199306
- dst->sin_len = sizeof(*dst);
-# endif
-# if (BSD >= 199306) && !defined(__NetBSD__) && !defined(__bsdi__) && \
- !defined(__OpenBSD__)
-# ifdef RTF_CLONING
- rtalloc_ign(ro, RTF_CLONING);
-# else
- rtalloc_ign(ro, RTF_PRCLONING);
-# endif
-# else
- rtalloc(ro);
-# endif
-
- if (!ifp) {
- if (!fr || !(fr->fr_flags & FR_FASTROUTE)) {
- error = -2;
-# if (defined(IRIX) && (IRIX >= 605))
- ROUTE_UNLOCK();
-# endif
- goto bad;
- }
- }
-
- if ((ifp == NULL) && (ro->ro_rt != NULL))
- ifp = ro->ro_rt->rt_ifp;
-
- if ((ro->ro_rt == NULL) || (ifp == NULL)) {
- if (in_localaddr(ip->ip_dst))
- error = EHOSTUNREACH;
- else
- error = ENETUNREACH;
-# if (defined(IRIX) && (IRIX >= 605))
- ROUTE_UNLOCK();
-# endif
- goto bad;
- }
-
- if (ro->ro_rt->rt_flags & RTF_GATEWAY) {
-#if (BSD >= 199306) || (defined(IRIX) && (IRIX >= 605))
- dst = (struct sockaddr_in *)ro->ro_rt->rt_gateway;
-#else
- dst = (struct sockaddr_in *)&ro->ro_rt->rt_gateway;
-#endif
- }
- ro->ro_rt->rt_use++;
-
-#if (defined(IRIX) && (IRIX > 602))
- ROUTE_UNLOCK();
-#endif
-
- /*
- * For input packets which are being "fastrouted", they won't
- * go back through output filtering and miss their chance to get
- * NAT'd and counted.
- */
- if (fin->fin_out == 0) {
- sifp = fin->fin_ifp;
- sout = fin->fin_out;
- fin->fin_ifp = ifp;
- fin->fin_out = 1;
- if ((fin->fin_fr = ipacct[1][fr_active]) &&
- (fr_scanlist(FR_NOMATCH, ip, fin, m) & FR_ACCOUNT)) {
- ATOMIC_INCL(frstats[1].fr_acct);
- }
- fin->fin_fr = NULL;
- if (!fr || !(fr->fr_flags & FR_RETMASK))
- (void) fr_checkstate(ip, fin);
-
- switch (ip_natout(ip, fin))
- {
- case 0 :
- break;
- case 1 :
- ip->ip_sum = 0;
- break;
- case -1 :
- error = EINVAL;
- goto done;
- break;
- }
-
- fin->fin_ifp = sifp;
- fin->fin_out = sout;
- } else
- ip->ip_sum = 0;
-
- /*
- * If small enough for interface, can just send directly.
- */
- if (ip->ip_len <= ifp->if_mtu) {
-# ifndef sparc
-# if (!defined(__FreeBSD__) && !(_BSDI_VERSION >= 199510)) && \
- !(__NetBSD_Version__ >= 105110000)
- ip->ip_id = htons(ip->ip_id);
-# endif
- ip->ip_len = htons(ip->ip_len);
- ip->ip_off = htons(ip->ip_off);
-# endif
-# if defined(__NetBSD__) && defined(M_CSUM_IPv4)
-# if (__NetBSD_Version__ > 105009999)
- if (ifp->if_csum_flags_tx & IFCAP_CSUM_IPv4)
- m->m_pkthdr.csum_flags |= M_CSUM_IPv4;
- else if (ip->ip_sum == 0)
- ip->ip_sum = in_cksum(m, hlen);
-# else
- if (ifp->if_capabilities & IFCAP_CSUM_IPv4)
- m->m_pkthdr.csuminfo |= M_CSUM_IPv4;
- else if (ip->ip_sum == 0)
- ip->ip_sum = in_cksum(m, hlen);
-# endif
-# else
- if (!ip->ip_sum)
- ip->ip_sum = in_cksum(m, hlen);
-# endif /* __NetBSD__ && M_CSUM_IPv4 */
-# if (BSD >= 199306) || (defined(IRIX) && (IRIX >= 605))
-# ifdef IRIX
- IFNET_UPPERLOCK(ifp);
-# endif
- error = (*ifp->if_output)(ifp, m, (struct sockaddr *)dst,
- ro->ro_rt);
-# ifdef IRIX
- IFNET_UPPERUNLOCK(ifp);
-# endif
-# else
- error = (*ifp->if_output)(ifp, m, (struct sockaddr *)dst);
-# endif
- goto done;
- }
-
- /*
- * Too large for interface; fragment if possible.
- * Must be able to put at least 8 bytes per fragment.
- */
- if (ip->ip_off & IP_DF) {
- error = EMSGSIZE;
- goto bad;
- }
- len = (ifp->if_mtu - hlen) &~ 7;
- if (len < 8) {
- error = EMSGSIZE;
- goto bad;
- }
-
- {
- int mhlen, firstlen = len;
- struct mbuf **mnext = &m->m_act;
-
- /*
- * Loop through length of segment after first fragment,
- * make new header and copy data of each part and link onto chain.
- */
- m0 = m;
- mhlen = sizeof (struct ip);
- for (off = hlen + len; off < ip->ip_len; off += len) {
-# ifdef MGETHDR
- MGETHDR(m, M_DONTWAIT, MT_HEADER);
-# else
- MGET(m, M_DONTWAIT, MT_HEADER);
-# endif
- if (m == 0) {
- error = ENOBUFS;
- goto bad;
- }
-# if BSD >= 199306
- m->m_data += max_linkhdr;
-# else
- m->m_off = MMAXOFF - hlen;
-# endif
- mhip = mtod(m, struct ip *);
- bcopy((char *)ip, (char *)mhip, sizeof(*ip));
- if (hlen > sizeof (struct ip)) {
- mhlen = ip_optcopy(ip, mhip) + sizeof (struct ip);
- mhip->ip_hl = mhlen >> 2;
- }
- m->m_len = mhlen;
- mhip->ip_off = ((off - hlen) >> 3) + (ip->ip_off & ~IP_MF);
- if (ip->ip_off & IP_MF)
- mhip->ip_off |= IP_MF;
- if (off + len >= ip->ip_len)
- len = ip->ip_len - off;
- else
- mhip->ip_off |= IP_MF;
- mhip->ip_len = htons((u_short)(len + mhlen));
- m->m_next = m_copy(m0, off, len);
- if (m->m_next == 0) {
- error = ENOBUFS; /* ??? */
- goto sendorfree;
- }
-# if BSD >= 199306
- m->m_pkthdr.len = mhlen + len;
- m->m_pkthdr.rcvif = NULL;
-# endif
- mhip->ip_off = htons((u_short)mhip->ip_off);
- mhip->ip_sum = 0;
- mhip->ip_sum = in_cksum(m, mhlen);
- *mnext = m;
- mnext = &m->m_act;
- }
- /*
- * Update first fragment by trimming what's been copied out
- * and updating header, then send each fragment (in order).
- */
- m_adj(m0, hlen + firstlen - ip->ip_len);
- ip->ip_len = htons((u_short)(hlen + firstlen));
- ip->ip_off = htons((u_short)(ip->ip_off | IP_MF));
- ip->ip_sum = 0;
- ip->ip_sum = in_cksum(m0, hlen);
-sendorfree:
- for (m = m0; m; m = m0) {
- m0 = m->m_act;
- m->m_act = 0;
- if (error == 0)
-# if (BSD >= 199306) || (defined(IRIX) && (IRIX >= 605))
- error = (*ifp->if_output)(ifp, m,
- (struct sockaddr *)dst, ro->ro_rt);
-# else
- error = (*ifp->if_output)(ifp, m,
- (struct sockaddr *)dst);
-# endif
- else
- m_freem(m);
- }
- }
-done:
- if (!error)
- ipl_frouteok[0]++;
- else
- ipl_frouteok[1]++;
-
- if (ro->ro_rt != NULL) {
- RTFREE(ro->ro_rt);
- }
- *mpp = NULL;
- return error;
-bad:
- if ((error == EMSGSIZE) && (fin->fin_v == 4)) {
- sifp = fin->fin_ifp;
- code = fin->fin_icode;
- fin->fin_icode = ICMP_UNREACH_NEEDFRAG;
- fin->fin_ifp = ifp;
- (void) send_icmp_err(ip, ICMP_UNREACH, fin, 1);
- fin->fin_ifp = sifp;
- fin->fin_icode = code;
- }
- m_freem(m);
- goto done;
-}
-
-
-/*
- * Return true or false depending on whether the route to the
- * given IP address uses the same interface as the one passed.
- */
-int fr_verifysrc(ipa, ifp)
-struct in_addr ipa;
-void *ifp;
-{
- struct sockaddr_in *dst;
- struct route iproute;
-
- bzero((char *)&iproute, sizeof(iproute));
- dst = (struct sockaddr_in *)&iproute.ro_dst;
-# if (BSD >= 199306)
- dst->sin_len = sizeof(*dst);
-# endif
- dst->sin_family = AF_INET;
- dst->sin_addr = ipa;
-# if (BSD >= 199306) && !defined(__NetBSD__) && !defined(__bsdi__) && \
- !defined(__OpenBSD__)
-# ifdef RTF_CLONING
- rtalloc_ign(&iproute, RTF_CLONING);
-# else
- rtalloc_ign(&iproute, RTF_PRCLONING);
-# endif
-# else
- rtalloc(&iproute);
-# endif
- if (iproute.ro_rt == NULL)
- return 0;
- return (ifp == iproute.ro_rt->rt_ifp);
-}
-
-
-# ifdef USE_GETIFNAME
-char *
-get_ifname(ifp)
-struct ifnet *ifp;
-{
- static char workbuf[64];
-
- sprintf(workbuf, "%s%d", ifp->if_name, ifp->if_unit);
- return workbuf;
-}
-# endif
-
-
-# if defined(USE_INET6)
-/*
- * This is the IPv6 specific fastroute code. It doesn't clean up the mbuf's
- * or ensure that it is an IPv6 packet that is being forwarded, those are
- * expected to be done by the called (ipfr_fastroute).
- */
-static int ipfr_fastroute6(m0, mpp, fin, fdp)
-struct mbuf *m0, **mpp;
-fr_info_t *fin;
-frdest_t *fdp;
-{
- struct route_in6 ip6route;
- struct sockaddr_in6 *dst6;
- struct route_in6 *ro;
- struct ifnet *ifp;
- frentry_t *fr;
-#if defined(OpenBSD) && (OpenBSD >= 200211)
- struct route_in6 *ro_pmtu = NULL;
- struct in6_addr finaldst;
- ip6_t *ip6;
-#endif
- u_long mtu;
- int error;
-
- ro = &ip6route;
- fr = fin->fin_fr;
- bzero((caddr_t)ro, sizeof(*ro));
- dst6 = (struct sockaddr_in6 *)&ro->ro_dst;
- dst6->sin6_family = AF_INET6;
- dst6->sin6_len = sizeof(struct sockaddr_in6);
- dst6->sin6_addr = fin->fin_fi.fi_dst.in6;
-
- if (fdp != NULL)
- ifp = fdp->fd_ifp;
- else
- ifp = fin->fin_ifp;
-
- if ((fr != NULL) && (fin->fin_rev != 0)) {
- if ((ifp != NULL) && (fdp == &fr->fr_tif))
- return 0;
- } else if (fdp != NULL) {
- if (IP6_NOTZERO(&fdp->fd_ip6))
- dst6->sin6_addr = fdp->fd_ip6.in6;
- }
- if (ifp == NULL)
- return -2;
-
-#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__)
- /* KAME */
- if (IN6_IS_ADDR_LINKLOCAL(&dst6->sin6_addr))
- dst6->sin6_addr.s6_addr16[1] = htons(ifp->if_index);
-#endif
- rtalloc((struct route *)ro);
-
- if ((ifp == NULL) && (ro->ro_rt != NULL))
- ifp = ro->ro_rt->rt_ifp;
-
- if ((ro->ro_rt == NULL) || (ifp == NULL) ||
- (ifp != ro->ro_rt->rt_ifp)) {
- error = EHOSTUNREACH;
- } else {
- if (ro->ro_rt->rt_flags & RTF_GATEWAY)
- dst6 = (struct sockaddr_in6 *)ro->ro_rt->rt_gateway;
- ro->ro_rt->rt_use++;
-
-#if defined(OpenBSD) && (OpenBSD >= 200211)
- ip6 = mtod(m0, ip6_t *);
- ro_pmtu = ro;
- finaldst = ip6->ip6_dst;
- error = ip6_getpmtu(ro_pmtu, ro, ifp, &finaldst, &mtu);
- if (error == 0) {
-#else
-# ifdef IN6_LINKMTU
- mtu = IN6_LINKMTU(ifp);
-# else
-# ifdef ND_IFINFO
- mtu = ND_IFINFO(ifp)->linkmtu;
-# else
- mtu = nd_ifinfo[ifp->if_index].linkmtu;
-# endif
-# endif
-#endif
- if (m0->m_pkthdr.len <= mtu)
- error = nd6_output(ifp, fin->fin_ifp, m0,
- dst6, ro->ro_rt);
- else
- error = EMSGSIZE;
-#if defined(OpenBSD) && (OpenBSD >= 200211)
- }
-#endif
- }
-
- if (ro->ro_rt != NULL) {
- RTFREE(ro->ro_rt);
- }
- return error;
-}
-# endif
-#else /* #ifdef _KERNEL */
-
-
-# if defined(__sgi) && (IRIX < 605)
-static int no_output __P((struct ifnet *ifp, struct mbuf *m,
- struct sockaddr *s))
-# else
-static int no_output __P((struct ifnet *ifp, struct mbuf *m,
- struct sockaddr *s, struct rtentry *rt))
-# endif
-{
- return 0;
-}
-
-
-# ifdef __STDC__
-# if defined(__sgi) && (IRIX < 605)
-static int write_output __P((struct ifnet *ifp, struct mbuf *m,
- struct sockaddr *s))
-# else
-static int write_output __P((struct ifnet *ifp, struct mbuf *m,
- struct sockaddr *s, struct rtentry *rt))
-# endif
-{
- ip_t *ip = (ip_t *)m;
-# else
-static int write_output(ifp, ip)
-struct ifnet *ifp;
-ip_t *ip;
-{
-# endif
- char fname[32];
- int fd;
-
-# if (defined(NetBSD) && (NetBSD <= 1991011) && (NetBSD >= 199606)) || \
- (defined(OpenBSD) && (OpenBSD >= 199603))
- sprintf(fname, "%s", ifp->if_xname);
-# else
- sprintf(fname, "%s%d", ifp->if_name, ifp->if_unit);
-# endif
- fd = open(fname, O_WRONLY|O_APPEND);
- if (fd == -1) {
- perror("open");
- return -1;
- }
- write(fd, (char *)ip, ntohs(ip->ip_len));
- close(fd);
- return 0;
-}
-
-
-char *get_ifname(ifp)
-struct ifnet *ifp;
-{
-# if (defined(NetBSD) && (NetBSD <= 1991011) && (NetBSD >= 199606)) || \
- (defined(OpenBSD) && (OpenBSD >= 199603))
- return ifp->if_xname;
-# else
- static char fullifname[LIFNAMSIZ];
-
- sprintf(fullifname, "%s%d", ifp->if_name, ifp->if_unit);
- return fullifname;
-# endif
-}
-
-
-struct ifnet *get_unit(ifname, v)
-char *ifname;
-int v;
-{
- struct ifnet *ifp, **ifa, **old_ifneta;
-
- for (ifa = ifneta; ifa && (ifp = *ifa); ifa++) {
-# if (defined(NetBSD) && (NetBSD <= 1991011) && (NetBSD >= 199606)) || \
- (defined(OpenBSD) && (OpenBSD >= 199603))
- if (!strncmp(ifname, ifp->if_xname, sizeof(ifp->if_xname)))
-# else
- char fullname[LIFNAMSIZ];
-
- sprintf(fullname, "%s%d", ifp->if_name, ifp->if_unit);
- if (!strcmp(ifname, fullname))
-# endif
- return ifp;
- }
-
- if (!ifneta) {
- ifneta = (struct ifnet **)malloc(sizeof(ifp) * 2);
- if (!ifneta)
- return NULL;
- ifneta[1] = NULL;
- ifneta[0] = (struct ifnet *)calloc(1, sizeof(*ifp));
- if (!ifneta[0]) {
- free(ifneta);
- return NULL;
- }
- nifs = 1;
- } else {
- old_ifneta = ifneta;
- nifs++;
- ifneta = (struct ifnet **)realloc(ifneta,
- (nifs + 1) * sizeof(*ifa));
- if (!ifneta) {
- free(old_ifneta);
- nifs = 0;
- return NULL;
- }
- ifneta[nifs] = NULL;
- ifneta[nifs - 1] = (struct ifnet *)malloc(sizeof(*ifp));
- if (!ifneta[nifs - 1]) {
- nifs--;
- return NULL;
- }
- }
- ifp = ifneta[nifs - 1];
-
-# if (defined(NetBSD) && (NetBSD <= 1991011) && (NetBSD >= 199606)) || \
- (defined(OpenBSD) && (OpenBSD >= 199603))
- strncpy(ifp->if_xname, ifname, sizeof(ifp->if_xname));
-# else
- ifp->if_name = strdup(ifname);
-
- ifname = ifp->if_name;
- while (*ifname && !isdigit(*ifname))
- ifname++;
- if (*ifname && isdigit(*ifname)) {
- ifp->if_unit = atoi(ifname);
- *ifname = '\0';
- } else
- ifp->if_unit = -1;
-# endif
- ifp->if_output = no_output;
- return ifp;
-}
-
-
-
-void init_ifp()
-{
- struct ifnet *ifp, **ifa;
- char fname[32];
- int fd;
-
-# if (defined(NetBSD) && (NetBSD <= 1991011) && (NetBSD >= 199606)) || \
- (defined(OpenBSD) && (OpenBSD >= 199603))
- for (ifa = ifneta; ifa && (ifp = *ifa); ifa++) {
- ifp->if_output = write_output;
- sprintf(fname, "/tmp/%s", ifp->if_xname);
- fd = open(fname, O_WRONLY|O_CREAT|O_EXCL|O_TRUNC, 0600);
- if (fd == -1)
- perror("open");
- else
- close(fd);
- }
-# else
-
- for (ifa = ifneta; ifa && (ifp = *ifa); ifa++) {
- ifp->if_output = write_output;
- sprintf(fname, "/tmp/%s%d", ifp->if_name, ifp->if_unit);
- fd = open(fname, O_WRONLY|O_CREAT|O_EXCL|O_TRUNC, 0600);
- if (fd == -1)
- perror("open");
- else
- close(fd);
- }
-# endif
-}
-
-
-int send_reset(ip, fin)
-ip_t *ip;
-fr_info_t *fin;
-{
- verbose("- TCP RST sent\n");
- return 0;
-}
-
-
-int send_icmp_err(ip, code, fin, dst)
-ip_t *ip;
-int code;
-fr_info_t *fin;
-int dst;
-{
- verbose("- ICMP UNREACHABLE sent\n");
- return 0;
-}
-
-
-void frsync()
-{
- return;
-}
-
-void m_copydata(m, off, len, cp)
-mb_t *m;
-int off, len;
-caddr_t cp;
-{
- bcopy((char *)m + off, cp, len);
-}
-
-
-int ipfuiomove(buf, len, rwflag, uio)
-caddr_t buf;
-int len, rwflag;
-struct uio *uio;
-{
- int left, ioc, num, offset;
- struct iovec *io;
- char *start;
-
- if (rwflag == UIO_READ) {
- left = len;
- ioc = 0;
-
- offset = uio->uio_offset;
-
- while ((left > 0) && (ioc < uio->uio_iovcnt)) {
- io = uio->uio_iov + ioc;
- num = io->iov_len;
- if (num > left)
- num = left;
- start = (char *)io->iov_base + offset;
- if (start > (char *)io->iov_base + io->iov_len) {
- offset -= io->iov_len;
- ioc++;
- continue;
- }
- bcopy(buf, start, num);
- uio->uio_resid -= num;
- uio->uio_offset += num;
- left -= num;
- if (left > 0)
- ioc++;
- }
- if (left > 0)
- return EFAULT;
- }
- return 0;
-}
-#endif /* _KERNEL */
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