Apply a few changes from ipfilter-current:

* Do not hold any locks over calls to copyin/copyout.
* Clean up some #ifdefs
* fix a possible mbuf leak when NAT fails on policy routed packets

PR:		117216

sys/contrib/ipfilter/netinet/fil.c

@@ -2514,7 +2514,7 @@ int out;
 	} else
 #endif
 	{
-#if (defined(OpenBSD) && OpenBSD >= 200311) && defined(_KERNEL)
+#if (defined(OpenBSD) && (OpenBSD >= 200311)) && defined(_KERNEL)
 		ip->ip_len = ntohs(ip->ip_len);
 		ip->ip_off = ntohs(ip->ip_off);
 #endif
@@ -2777,7 +2777,7 @@ finished:
 	RWLOCK_EXIT(&ipf_global);
 
 #ifdef _KERNEL
-# if defined(OpenBSD) && OpenBSD >= 200311    
+# if (defined(OpenBSD) && (OpenBSD >= 200311))
 	if (FR_ISPASS(pass) && (v == 4)) {
 		ip = fin->fin_ip;
 		ip->ip_len = ntohs(ip->ip_len);
@@ -7024,7 +7024,6 @@ void *ctx;
 				break;
 			}
 
-			RWLOCK_EXIT(&ipf_global);
 			WRITE_ENTER(&ipf_global);
 			if (tmp) {
 				if (fr_running > 0)
@@ -7040,6 +7039,7 @@ void *ctx;
 				if (error == 0)
 					fr_running = -1;
 			}
+			RWLOCK_EXIT(&ipf_global);
 		}
 		break;
 
@@ -7181,7 +7181,6 @@ void *ctx;
 		if (!(mode & FWRITE))
 			error = EPERM;
 		else {
-			RWLOCK_EXIT(&ipf_global);
 			WRITE_ENTER(&ipf_global);
 #ifdef MENTAT
 			error = ipfsync();
@@ -7189,6 +7188,7 @@ void *ctx;
 			frsync(NULL);
 			error = 0;
 #endif
+			RWLOCK_EXIT(&ipf_global);
 
 		}
 		break;

sys/contrib/ipfilter/netinet/ip_auth.c

@@ -53,7 +53,7 @@ struct file;
 # include <sys/kmem.h>
 #endif
 #if (defined(_BSDI_VERSION) && _BSDI_VERSION >= 199802) || \
-    (__FreeBSD_version >= 400000)
+    (defined(__FreeBSD_version) &&(__FreeBSD_version >= 400000))
 # include <sys/queue.h>
 #endif
 #if defined(__NetBSD__) || defined(__OpenBSD__) || defined(bsdi)

sys/contrib/ipfilter/netinet/ip_compat.h

@@ -35,7 +35,7 @@
 #ifndef	SOLARIS
 #define	SOLARIS	(defined(sun) && (defined(__svr4__) || defined(__SVR4)))
 #endif
-#if defined(SOLARIS2) && SOLARIS2 >= 8
+#if (defined(SOLARIS2) && (SOLARIS2 >= 8))
 # ifndef	USE_INET6
 #  define	USE_INET6
 # endif

sys/contrib/ipfilter/netinet/ip_fil_freebsd.c

@@ -341,22 +341,19 @@ int mode;
 		if (unit != IPL_LOGIPF)
 			return EIO;
 		if (cmd != SIOCIPFGETNEXT && cmd != SIOCIPFGET &&
-		    cmd != SIOCIPFSET && cmd != SIOCFRENB && 
+		    cmd != SIOCIPFSET && cmd != SIOCFRENB &&
 		    cmd != SIOCGETFS && cmd != SIOCGETFF)
 			return EIO;
 	}
 
 	SPL_NET(s);
-	READ_ENTER(&ipf_global);
 
 	error = fr_ioctlswitch(unit, data, cmd, mode, p->p_uid, p);
 	if (error != -1) {
-		RWLOCK_EXIT(&ipf_global);
 		SPL_X(s);
 		return error;
 	}
 
-	RWLOCK_EXIT(&ipf_global);
 	SPL_X(s);
 
 	return error;
@@ -885,13 +882,17 @@ iplinit()
 #endif /* __FreeBSD_version < 300000 */
 
 
+/*
+ * m0 - pointer to mbuf where the IP packet starts
+ * mpp - pointer to the mbuf pointer that is the start of the mbuf chain
+ */
 int fr_fastroute(m0, mpp, fin, fdp)
 mb_t *m0, **mpp;
 fr_info_t *fin;
 frdest_t *fdp;
 {
 	register struct ip *ip, *mhip;
-	register struct mbuf *m = m0;
+	register struct mbuf *m = *mpp;
 	register struct route *ro;
 	int len, off, error = 0, hlen, code;
 	struct ifnet *ifp, *sifp;
@@ -1016,7 +1017,7 @@ frdest_t *fdp;
 			break;
 		case -1 :
 			error = -1;
-			goto done;
+			goto bad;
 			break;
 		}
 

sys/contrib/ipfilter/netinet/ip_log.c

@@ -52,7 +52,8 @@ struct file;
 # undef _KERNEL
 # undef KERNEL
 #endif
-#if __FreeBSD_version >= 220000 && defined(_KERNEL)
+#if (defined(__FreeBSD_version) && (__FreeBSD_version >= 220000)) && \
+    defined(_KERNEL)
 # include <sys/fcntl.h>
 # include <sys/filio.h>
 #else
@@ -61,14 +62,14 @@ struct file;
 #include <sys/time.h>
 #if defined(_KERNEL)
 # include <sys/systm.h>
-# if defined(NetBSD) && (__NetBSD_Version__ >= 104000000)
+# if (defined(NetBSD) && (__NetBSD_Version__ >= 104000000))
 #  include <sys/proc.h>
 # endif
 #endif /* _KERNEL */
 #if !SOLARIS && !defined(__hpux) && !defined(linux)
-# if (defined(NetBSD) && NetBSD > 199609) || \
-     (defined(OpenBSD) && OpenBSD > 199603) || \
-     (__FreeBSD_version >= 300000)
+# if (defined(NetBSD) && (NetBSD > 199609)) || \
+     (defined(OpenBSD) && (OpenBSD > 199603)) || \
+     (defined(__FreeBSD_version) && (__FreeBSD_version >= 300000))
 #  include <sys/dirent.h>
 # else
 #  include <sys/dir.h>

sys/contrib/ipfilter/netinet/ip_nat.c

@@ -190,8 +190,8 @@ static	void	nat_addnat __P((struct ipnat *));
 static	void	nat_addrdr __P((struct ipnat *));
 static	void	nat_delrdr __P((struct ipnat *));
 static	void	nat_delnat __P((struct ipnat *));
-static	int	fr_natgetent __P((caddr_t));
-static	int	fr_natgetsz __P((caddr_t));
+static	int	fr_natgetent __P((caddr_t, int));
+static	int	fr_natgetsz __P((caddr_t, int));
 static	int	fr_natputent __P((caddr_t, int));
 static	int	nat_extraflush __P((int));
 static	int	nat_gettable __P((char *));
@@ -820,20 +820,23 @@ void *ctx;
 	    {
 		natlookup_t nl;
 
-		if (getlock) {
-			READ_ENTER(&ipf_nat);
-		}
 		error = fr_inobj(data, &nl, IPFOBJ_NATLOOKUP);
 		if (error == 0) {
-			if (nat_lookupredir(&nl) != NULL) {
+			void *ptr;
+
+			if (getlock) {
+				READ_ENTER(&ipf_nat);
+			}
+			ptr = nat_lookupredir(&nl);
+			if (getlock) {
+				RWLOCK_EXIT(&ipf_nat);
+			}
+			if (ptr != NULL) {
 				error = fr_outobj(data, &nl, IPFOBJ_NATLOOKUP);
 			} else {
 				error = ESRCH;
 			}
 		}
-		if (getlock) {
-			RWLOCK_EXIT(&ipf_nat);
-		}
 		break;
 	    }
 
@@ -888,26 +891,14 @@ void *ctx;
 
 	case SIOCSTGSZ :
 		if (fr_nat_lock) {
-			if (getlock) {
-				READ_ENTER(&ipf_nat);
-			}
-			error = fr_natgetsz(data);
-			if (getlock) {
-				RWLOCK_EXIT(&ipf_nat);
-			}
+			error = fr_natgetsz(data, getlock);
 		} else
 			error = EACCES;
 		break;
 
 	case SIOCSTGET :
 		if (fr_nat_lock) {
-			if (getlock) {
-				READ_ENTER(&ipf_nat);
-			}
-			error = fr_natgetent(data);
-			if (getlock) {
-				RWLOCK_EXIT(&ipf_nat);
-			}
+			error = fr_natgetent(data, getlock);
 		} else
 			error = EACCES;
 		break;
@@ -1202,8 +1193,9 @@ int getlock;
 /* The size of the entry is stored in the ng_sz field and the enture natget */
 /* structure is copied back to the user.                                    */
 /* ------------------------------------------------------------------------ */
-static int fr_natgetsz(data)
+static int fr_natgetsz(data, getlock)
 caddr_t data;
+int getlock;
 {
 	ap_session_t *aps;
 	nat_t *nat, *n;
@@ -1212,6 +1204,10 @@ caddr_t data;
 	if (BCOPYIN(data, &ng, sizeof(ng)) != 0)
 		return EFAULT;
 
+	if (getlock) {
+		READ_ENTER(&ipf_nat);
+	}
+
 	nat = ng.ng_ptr;
 	if (!nat) {
 		nat = nat_instances;
@@ -1220,6 +1216,9 @@ caddr_t data;
 		 * Empty list so the size returned is 0.  Simple.
 		 */
 		if (nat == NULL) {
+			if (getlock) {
+				RWLOCK_EXIT(&ipf_nat);
+			}
 			if (BCOPYOUT(&ng, data, sizeof(ng)) != 0)
 				return EFAULT;
 			return 0;
@@ -1233,8 +1232,12 @@ caddr_t data;
 		for (n = nat_instances; n; n = n->nat_next)
 			if (n == nat)
 				break;
-		if (!n)
+		if (n == NULL) {
+			if (getlock) {
+				RWLOCK_EXIT(&ipf_nat);
+			}
 			return ESRCH;
+		}
 	}
 
 	/*
@@ -1247,6 +1250,9 @@ caddr_t data;
 		if (aps->aps_data != 0)
 			ng.ng_sz += aps->aps_psiz;
 	}
+	if (getlock) {
+		RWLOCK_EXIT(&ipf_nat);
+	}
 
 	if (BCOPYOUT(&ng, data, sizeof(ng)) != 0)
 		return EFAULT;
@@ -1264,8 +1270,9 @@ caddr_t data;
 /* Copies out NAT entry to user space.  Any additional data held for a      */
 /* proxy is also copied, as to is the NAT rule which was responsible for it */
 /* ------------------------------------------------------------------------ */
-static int fr_natgetent(data)
+static int fr_natgetent(data, getlock)
 caddr_t data;
+int getlock;
 {
 	int error, outsize;
 	ap_session_t *aps;
@@ -1283,6 +1290,10 @@ caddr_t data;
 	if (ipn == NULL)
 		return ENOMEM;
 
+	if (getlock) {
+		READ_ENTER(&ipf_nat);
+	}
+
 	ipn->ipn_dsize = ipns.ipn_dsize;
 	nat = ipns.ipn_next;
 	if (nat == NULL) {
@@ -1353,10 +1364,17 @@ caddr_t data;
 			error = ENOBUFS;
 	}
 	if (error == 0) {
+		if (getlock) {
+			RWLOCK_EXIT(&ipf_nat);
+			getlock = 0;
+		}
 		error = fr_outobjsz(data, ipn, IPFOBJ_NATSAVE, ipns.ipn_dsize);
 	}
 
 finished:
+	if (getlock) {
+		RWLOCK_EXIT(&ipf_nat);
+	}
 	if (ipn != NULL) {
 		KFREES(ipn, ipns.ipn_dsize);
 	}

sys/contrib/ipfilter/netinet/ip_state.c

@@ -655,10 +655,12 @@ caddr_t data;
 	if (error != 0)
 		return error;
 
+	READ_ENTER(&ipf_state);
 	isn = ips.ips_next;
 	if (isn == NULL) {
 		isn = ips_list;
 		if (isn == NULL) {
+			RWLOCK_EXIT(&ipf_state);
 			if (ips.ips_next == NULL)
 				return ENOENT;
 			return 0;
@@ -672,8 +674,10 @@ caddr_t data;
 		for (is = ips_list; is; is = is->is_next)
 			if (is == isn)
 				break;
-		if (!is)
+		if (is == NULL) {
+			RWLOCK_EXIT(&ipf_state);
 			return ESRCH;
+		}
 	}
 	ips.ips_next = isn->is_next;
 	bcopy((char *)isn, (char *)&ips.ips_is, sizeof(ips.ips_is));
@@ -681,6 +685,7 @@ caddr_t data;
 	if (isn->is_rule != NULL)
 		bcopy((char *)isn->is_rule, (char *)&ips.ips_fr,
 		      sizeof(ips.ips_fr));
+	RWLOCK_EXIT(&ipf_state);
 	error = fr_outobj(data, &ips, IPFOBJ_STATESAVE);
 	return error;
 }