+++ /dev/null
---- linux-2.4.21/net/bridge/br_private.h Mon Feb 25 20:38:14 2002
-+++ linux-2.4.21-ebt-brnf-3/net/bridge/br_private.h Fri Aug 8 01:09:06 2003
-@@ -144,8 +144,10 @@ extern void br_fdb_insert(struct net_bri
- /* br_forward.c */
- extern void br_deliver(struct net_bridge_port *to,
- struct sk_buff *skb);
-+extern int br_dev_queue_push_xmit(struct sk_buff *skb);
- extern void br_forward(struct net_bridge_port *to,
- struct sk_buff *skb);
-+extern int br_forward_finish(struct sk_buff *skb);
- extern void br_flood_deliver(struct net_bridge *br,
- struct sk_buff *skb,
- int clone);
-@@ -166,7 +168,8 @@ extern void br_get_port_ifindices(struct
- int *ifindices);
-
- /* br_input.c */
--extern void br_handle_frame(struct sk_buff *skb);
-+extern int br_handle_frame_finish(struct sk_buff *skb);
-+extern int br_handle_frame(struct sk_buff *skb);
-
- /* br_ioctl.c */
- extern void br_call_ioctl_atomic(void (*fn)(void));
-@@ -176,6 +179,10 @@ extern int br_ioctl(struct net_bridge *b
- unsigned long arg1,
- unsigned long arg2);
- extern int br_ioctl_deviceless_stub(unsigned long arg);
-+
-+/* br_netfilter.c */
-+extern int br_netfilter_init(void);
-+extern void br_netfilter_fini(void);
-
- /* br_stp.c */
- extern int br_is_root_bridge(struct net_bridge *br);
---- linux-2.4.21/include/linux/if_bridge.h Thu Nov 22 20:47:12 2001
-+++ linux-2.4.21-ebt-brnf-3/include/linux/if_bridge.h Fri Aug 8 01:09:06 2003
-@@ -102,7 +102,8 @@ struct net_bridge;
- struct net_bridge_port;
-
- extern int (*br_ioctl_hook)(unsigned long arg);
--extern void (*br_handle_frame_hook)(struct sk_buff *skb);
-+extern int (*br_handle_frame_hook)(struct sk_buff *skb);
-+extern int (*br_should_route_hook)(struct sk_buff **pskb);
-
- #endif
-
---- linux-2.4.21/net/core/dev.c Fri Jun 13 16:51:39 2003
-+++ linux-2.4.21-ebt-brnf-3/net/core/dev.c Fri Aug 8 01:10:03 2003
-@@ -1424,7 +1424,7 @@ static void net_tx_action(struct softirq
-
-
- #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
--void (*br_handle_frame_hook)(struct sk_buff *skb) = NULL;
-+int (*br_handle_frame_hook)(struct sk_buff *skb) = NULL;
- #endif
-
- static __inline__ int handle_bridge(struct sk_buff *skb,
-@@ -1441,7 +1441,6 @@ static __inline__ int handle_bridge(stru
- }
- }
-
-- br_handle_frame_hook(skb);
- return ret;
- }
-
-@@ -1497,11 +1496,16 @@ int netif_receive_skb(struct sk_buff *sk
- if (skb->dev->divert && skb->dev->divert->divert)
- ret = handle_diverter(skb);
- #endif /* CONFIG_NET_DIVERT */
--
-+
- #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
- if (skb->dev->br_port != NULL &&
-- br_handle_frame_hook != NULL) {
-- return handle_bridge(skb, pt_prev);
-+ br_handle_frame_hook != NULL) {
-+ int ret;
-+
-+ ret = handle_bridge(skb, pt_prev);
-+ if (br_handle_frame_hook(skb) == 0)
-+ return ret;
-+ pt_prev = NULL;
- }
- #endif
-
-@@ -1897,7 +1901,7 @@ static int dev_proc_stats(char *buffer,
- * are adjusted, %RTM_NEWLINK is sent to the routing socket and the
- * function returns zero.
- */
--
-+
- int netdev_set_master(struct net_device *slave, struct net_device *master)
- {
- struct net_device *old = slave->master;
---- linux-2.4.21/net/bridge/br_input.c Sat Aug 3 02:39:46 2002
-+++ linux-2.4.21-ebt-brnf-3/net/bridge/br_input.c Fri Aug 8 01:09:06 2003
-@@ -24,6 +24,9 @@ unsigned char bridge_ula[6] = { 0x01, 0x
-
- static int br_pass_frame_up_finish(struct sk_buff *skb)
- {
-+#ifdef CONFIG_NETFILTER_DEBUG
-+ skb->nf_debug = 0;
-+#endif
- netif_rx(skb);
-
- return 0;
-@@ -46,7 +49,7 @@ static void br_pass_frame_up(struct net_
- br_pass_frame_up_finish);
- }
-
--static int br_handle_frame_finish(struct sk_buff *skb)
-+int br_handle_frame_finish(struct sk_buff *skb)
- {
- struct net_bridge *br;
- unsigned char *dest;
-@@ -112,7 +115,7 @@ err_nolock:
- return 0;
- }
-
--void br_handle_frame(struct sk_buff *skb)
-+int br_handle_frame(struct sk_buff *skb)
- {
- struct net_bridge *br;
- unsigned char *dest;
-@@ -146,25 +149,35 @@ void br_handle_frame(struct sk_buff *skb
- goto handle_special_frame;
-
- if (p->state == BR_STATE_FORWARDING) {
-+
-+ if (br_should_route_hook && br_should_route_hook(&skb)) {
-+ read_unlock(&br->lock);
-+ return -1;
-+ }
-+
-+ if (!memcmp(p->br->dev.dev_addr, dest, ETH_ALEN))
-+ skb->pkt_type = PACKET_HOST;
-+
- NF_HOOK(PF_BRIDGE, NF_BR_PRE_ROUTING, skb, skb->dev, NULL,
- br_handle_frame_finish);
- read_unlock(&br->lock);
-- return;
-+ return 0;
- }
-
- err:
- read_unlock(&br->lock);
- err_nolock:
- kfree_skb(skb);
-- return;
-+ return 0;
-
- handle_special_frame:
- if (!dest[5]) {
- br_stp_handle_bpdu(skb);
- read_unlock(&br->lock);
-- return;
-+ return 0;
- }
-
- read_unlock(&br->lock);
- kfree_skb(skb);
-+ return 0;
- }
---- linux-2.4.21/net/bridge/br_forward.c Sat Aug 3 02:39:46 2002
-+++ linux-2.4.21-ebt-brnf-3/net/bridge/br_forward.c Fri Aug 8 01:09:06 2003
-@@ -30,18 +30,22 @@ static inline int should_deliver(struct
- return 1;
- }
-
--static int __dev_queue_push_xmit(struct sk_buff *skb)
-+int br_dev_queue_push_xmit(struct sk_buff *skb)
- {
-+#ifdef CONFIG_NETFILTER
-+ if (skb->nf_bridge)
-+ memcpy(skb->data - 16, skb->nf_bridge->hh, 16);
-+#endif
- skb_push(skb, ETH_HLEN);
- dev_queue_xmit(skb);
-
- return 0;
- }
-
--static int __br_forward_finish(struct sk_buff *skb)
-+int br_forward_finish(struct sk_buff *skb)
- {
- NF_HOOK(PF_BRIDGE, NF_BR_POST_ROUTING, skb, NULL, skb->dev,
-- __dev_queue_push_xmit);
-+ br_dev_queue_push_xmit);
-
- return 0;
- }
-@@ -49,8 +53,11 @@ static int __br_forward_finish(struct sk
- static void __br_deliver(struct net_bridge_port *to, struct sk_buff *skb)
- {
- skb->dev = to->dev;
-+#ifdef CONFIG_NETFILTER_DEBUG
-+ skb->nf_debug = 0;
-+#endif
- NF_HOOK(PF_BRIDGE, NF_BR_LOCAL_OUT, skb, NULL, skb->dev,
-- __br_forward_finish);
-+ br_forward_finish);
- }
-
- static void __br_forward(struct net_bridge_port *to, struct sk_buff *skb)
-@@ -61,7 +68,7 @@ static void __br_forward(struct net_brid
- skb->dev = to->dev;
-
- NF_HOOK(PF_BRIDGE, NF_BR_FORWARD, skb, indev, skb->dev,
-- __br_forward_finish);
-+ br_forward_finish);
- }
-
- /* called under bridge lock */
---- linux-2.4.21/net/bridge/br.c Fri Nov 29 00:53:15 2002
-+++ linux-2.4.21-ebt-brnf-3/net/bridge/br.c Fri Aug 8 01:09:06 2003
-@@ -29,6 +29,8 @@
- #include "../atm/lec.h"
- #endif
-
-+int (*br_should_route_hook) (struct sk_buff **pskb) = NULL;
-+
- void br_dec_use_count()
- {
- MOD_DEC_USE_COUNT;
-@@ -43,6 +45,10 @@ static int __init br_init(void)
- {
- printk(KERN_INFO "NET4: Ethernet Bridge 008 for NET4.0\n");
-
-+#ifdef CONFIG_NETFILTER
-+ if (br_netfilter_init())
-+ return 1;
-+#endif
- br_handle_frame_hook = br_handle_frame;
- br_ioctl_hook = br_ioctl_deviceless_stub;
- #if defined(CONFIG_ATM_LANE) || defined(CONFIG_ATM_LANE_MODULE)
-@@ -61,6 +67,9 @@ static void __br_clear_ioctl_hook(void)
-
- static void __exit br_deinit(void)
- {
-+#ifdef CONFIG_NETFILTER
-+ br_netfilter_fini();
-+#endif
- unregister_netdevice_notifier(&br_device_notifier);
- br_call_ioctl_atomic(__br_clear_ioctl_hook);
-
-@@ -74,7 +83,7 @@ static void __exit br_deinit(void)
- #endif
- }
-
--EXPORT_NO_SYMBOLS;
-+EXPORT_SYMBOL(br_should_route_hook);
-
- module_init(br_init)
- module_exit(br_deinit)
---- linux-2.4.21/net/bridge/Makefile Fri Dec 29 23:07:24 2000
-+++ linux-2.4.21-ebt-brnf-3/net/bridge/Makefile Fri Aug 8 01:09:06 2003
-@@ -7,10 +7,17 @@
- #
- # Note 2! The CFLAGS definition is now in the main makefile...
-
-+export-objs := br.o
-+
- O_TARGET := bridge.o
- obj-y := br.o br_device.o br_fdb.o br_forward.o br_if.o br_input.o \
- br_ioctl.o br_notify.o br_stp.o br_stp_bpdu.o \
- br_stp_if.o br_stp_timer.o
-+
-+ifeq ($(CONFIG_NETFILTER),y)
-+obj-y += br_netfilter.o
-+endif
-+
- obj-m := $(O_TARGET)
-
- include $(TOPDIR)/Rules.make
---- linux-2.4.21/include/linux/netfilter_bridge.h Tue Jun 12 04:15:27 2001
-+++ linux-2.4.21-ebt-brnf-3/include/linux/netfilter_bridge.h Fri Aug 8 01:09:06 2003
-@@ -1,11 +1,14 @@
- #ifndef __LINUX_BRIDGE_NETFILTER_H
- #define __LINUX_BRIDGE_NETFILTER_H
-
--/* bridge-specific defines for netfilter.
-+/* bridge-specific defines for netfilter.
- */
-
- #include <linux/config.h>
- #include <linux/netfilter.h>
-+#if defined(__KERNEL__) && defined(CONFIG_NETFILTER)
-+#include <asm/atomic.h>
-+#endif
-
- /* Bridge Hooks */
- /* After promisc drops, checksum checks. */
-@@ -18,7 +21,49 @@
- #define NF_BR_LOCAL_OUT 3
- /* Packets about to hit the wire. */
- #define NF_BR_POST_ROUTING 4
--#define NF_BR_NUMHOOKS 5
-+/* Not really a hook, but used for the ebtables broute table */
-+#define NF_BR_BROUTING 5
-+#define NF_BR_NUMHOOKS 6
-
-+#ifdef __KERNEL__
-
-+#define BRNF_PKT_TYPE 0x01
-+#define BRNF_BRIDGED_DNAT 0x02
-+#define BRNF_DONT_TAKE_PARENT 0x04
-+#define BRNF_BRIDGED 0x08
-+
-+enum nf_br_hook_priorities {
-+ NF_BR_PRI_FIRST = INT_MIN,
-+ NF_BR_PRI_NAT_DST_BRIDGED = -300,
-+ NF_BR_PRI_FILTER_BRIDGED = -200,
-+ NF_BR_PRI_BRNF = 0,
-+ NF_BR_PRI_NAT_DST_OTHER = 100,
-+ NF_BR_PRI_FILTER_OTHER = 200,
-+ NF_BR_PRI_NAT_SRC = 300,
-+ NF_BR_PRI_LAST = INT_MAX,
-+};
-+
-+#ifdef CONFIG_NETFILTER
-+static inline
-+struct nf_bridge_info *nf_bridge_alloc(struct sk_buff *skb)
-+{
-+ struct nf_bridge_info **nf_bridge = &(skb->nf_bridge);
-+
-+ if ((*nf_bridge = kmalloc(sizeof(**nf_bridge), GFP_ATOMIC)) != NULL) {
-+ atomic_set(&(*nf_bridge)->use, 1);
-+ (*nf_bridge)->mask = 0;
-+ (*nf_bridge)->physindev = (*nf_bridge)->physoutdev = NULL;
-+ }
-+
-+ return *nf_bridge;
-+}
-+
-+struct bridge_skb_cb {
-+ union {
-+ __u32 ipv4;
-+ } daddr;
-+};
-+#endif /* CONFIG_NETFILTER */
-+
-+#endif /* __KERNEL__ */
- #endif
---- linux-2.4.21/net/Makefile Sat Aug 3 02:39:46 2002
-+++ linux-2.4.21-ebt-brnf-3/net/Makefile Fri Aug 8 01:09:06 2003
-@@ -7,7 +7,8 @@
-
- O_TARGET := network.o
-
--mod-subdirs := ipv4/netfilter ipv6/netfilter ipx irda bluetooth atm netlink sched core
-+mod-subdirs := ipv4/netfilter ipv6/netfilter bridge/netfilter ipx irda \
-+ bluetooth atm netlink sched core
- export-objs := netsyms.o
-
- subdir-y := core ethernet
-@@ -23,6 +24,12 @@ subdir-$(CONFIG_IPV6) += ipv6
- ifneq ($(CONFIG_IPV6),n)
- ifneq ($(CONFIG_IPV6),)
- subdir-$(CONFIG_NETFILTER) += ipv6/netfilter
-+endif
-+endif
-+
-+ifneq ($(CONFIG_BRIDGE),n)
-+ifneq ($(CONFIG_BRIDGE),)
-+subdir-$(CONFIG_BRIDGE) += bridge/netfilter
- endif
- endif
-
---- linux-2.4.21/net/Config.in Sat Aug 3 02:39:46 2002
-+++ linux-2.4.21-ebt-brnf-3/net/Config.in Fri Aug 8 01:09:06 2003
-@@ -65,6 +65,9 @@ if [ "$CONFIG_DECNET" != "n" ]; then
- source net/decnet/Config.in
- fi
- dep_tristate '802.1d Ethernet Bridging' CONFIG_BRIDGE $CONFIG_INET
-+if [ "$CONFIG_BRIDGE" != "n" -a "$CONFIG_NETFILTER" != "n" ]; then
-+ source net/bridge/netfilter/Config.in
-+fi
- if [ "$CONFIG_EXPERIMENTAL" = "y" ]; then
- tristate 'CCITT X.25 Packet Layer (EXPERIMENTAL)' CONFIG_X25
- tristate 'LAPB Data Link Driver (EXPERIMENTAL)' CONFIG_LAPB
---- /dev/null Thu Aug 24 11:00:32 2000
-+++ linux-2.4.21-ebt-brnf-3/net/bridge/netfilter/Makefile Fri Aug 8 01:09:06 2003
-@@ -0,0 +1,30 @@
-+#
-+# Makefile for the netfilter modules on top of bridging.
-+#
-+# Note! Dependencies are done automagically by 'make dep', which also
-+# removes any old dependencies. DON'T put your own dependencies here
-+# unless it's something special (ie not a .c file).
-+#
-+# Note 2! The CFLAGS definition is now in the main makefile...
-+
-+O_TARGET := netfilter.o
-+
-+export-objs := ebtables.o
-+
-+obj-$(CONFIG_BRIDGE_NF_EBTABLES) += ebtables.o
-+obj-$(CONFIG_BRIDGE_EBT_T_FILTER) += ebtable_filter.o
-+obj-$(CONFIG_BRIDGE_EBT_T_NAT) += ebtable_nat.o
-+obj-$(CONFIG_BRIDGE_EBT_BROUTE) += ebtable_broute.o
-+obj-$(CONFIG_BRIDGE_EBT_IPF) += ebt_ip.o
-+obj-$(CONFIG_BRIDGE_EBT_ARPF) += ebt_arp.o
-+obj-$(CONFIG_BRIDGE_EBT_VLANF) += ebt_vlan.o
-+obj-$(CONFIG_BRIDGE_EBT_MARKF) += ebt_mark_m.o
-+obj-$(CONFIG_BRIDGE_EBT_802_3) += ebt_802_3.o
-+obj-$(CONFIG_BRIDGE_EBT_PKTTYPE) += ebt_pkttype.o
-+obj-$(CONFIG_BRIDGE_EBT_PKTTYPE) += ebt_stp.o
-+obj-$(CONFIG_BRIDGE_EBT_LOG) += ebt_log.o
-+obj-$(CONFIG_BRIDGE_EBT_SNAT) += ebt_snat.o
-+obj-$(CONFIG_BRIDGE_EBT_DNAT) += ebt_dnat.o
-+obj-$(CONFIG_BRIDGE_EBT_REDIRECT) += ebt_redirect.o
-+obj-$(CONFIG_BRIDGE_EBT_MARK_T) += ebt_mark.o
-+include $(TOPDIR)/Rules.make
---- /dev/null Thu Aug 24 11:00:32 2000
-+++ linux-2.4.21-ebt-brnf-3/net/bridge/netfilter/Config.in Fri Aug 8 01:09:06 2003
-@@ -0,0 +1,19 @@
-+#
-+# Bridge netfilter configuration
-+#
-+dep_tristate ' Bridge: ebtables' CONFIG_BRIDGE_NF_EBTABLES $CONFIG_BRIDGE
-+dep_tristate ' ebt: filter table support' CONFIG_BRIDGE_EBT_T_FILTER $CONFIG_BRIDGE_NF_EBTABLES
-+dep_tristate ' ebt: nat table support' CONFIG_BRIDGE_EBT_T_NAT $CONFIG_BRIDGE_NF_EBTABLES
-+dep_tristate ' ebt: broute table support' CONFIG_BRIDGE_EBT_BROUTE $CONFIG_BRIDGE_NF_EBTABLES
-+dep_tristate ' ebt: log support' CONFIG_BRIDGE_EBT_LOG $CONFIG_BRIDGE_NF_EBTABLES
-+dep_tristate ' ebt: IP filter support' CONFIG_BRIDGE_EBT_IPF $CONFIG_BRIDGE_NF_EBTABLES
-+dep_tristate ' ebt: ARP filter support' CONFIG_BRIDGE_EBT_ARPF $CONFIG_BRIDGE_NF_EBTABLES
-+dep_tristate ' ebt: 802.1Q VLAN filter support' CONFIG_BRIDGE_EBT_VLANF $CONFIG_BRIDGE_NF_EBTABLES
-+dep_tristate ' ebt: 802.3 filter support' CONFIG_BRIDGE_EBT_802_3 $CONFIG_BRIDGE_NF_EBTABLES
-+dep_tristate ' ebt: packet type filter support' CONFIG_BRIDGE_EBT_PKTTYPE $CONFIG_BRIDGE_NF_EBTABLES
-+dep_tristate ' ebt: STP filter support' CONFIG_BRIDGE_EBT_STP $CONFIG_BRIDGE_NF_EBTABLES
-+dep_tristate ' ebt: mark filter support' CONFIG_BRIDGE_EBT_MARKF $CONFIG_BRIDGE_NF_EBTABLES
-+dep_tristate ' ebt: snat target support' CONFIG_BRIDGE_EBT_SNAT $CONFIG_BRIDGE_NF_EBTABLES
-+dep_tristate ' ebt: dnat target support' CONFIG_BRIDGE_EBT_DNAT $CONFIG_BRIDGE_NF_EBTABLES
-+dep_tristate ' ebt: redirect target support' CONFIG_BRIDGE_EBT_REDIRECT $CONFIG_BRIDGE_NF_EBTABLES
-+dep_tristate ' ebt: mark target support' CONFIG_BRIDGE_EBT_MARK_T $CONFIG_BRIDGE_NF_EBTABLES
---- /dev/null Thu Aug 24 11:00:32 2000
-+++ linux-2.4.21-ebt-brnf-3/net/bridge/netfilter/ebtable_filter.c Fri Aug 8 01:09:06 2003
-@@ -0,0 +1,90 @@
-+/*
-+ * ebtable_filter
-+ *
-+ * Authors:
-+ * Bart De Schuymer <bart.de.schuymer@pandora.be>
-+ *
-+ * April, 2002
-+ *
-+ */
-+
-+#include <linux/netfilter_bridge/ebtables.h>
-+#include <linux/module.h>
-+
-+#define FILTER_VALID_HOOKS ((1 << NF_BR_LOCAL_IN) | (1 << NF_BR_FORWARD) | \
-+ (1 << NF_BR_LOCAL_OUT))
-+
-+static struct ebt_entries initial_chains[] =
-+{
-+ {0, "INPUT", 0, EBT_ACCEPT, 0},
-+ {0, "FORWARD", 0, EBT_ACCEPT, 0},
-+ {0, "OUTPUT", 0, EBT_ACCEPT, 0}
-+};
-+
-+static struct ebt_replace initial_table =
-+{
-+ "filter", FILTER_VALID_HOOKS, 0, 3 * sizeof(struct ebt_entries),
-+ { [NF_BR_LOCAL_IN]&initial_chains[0], [NF_BR_FORWARD]&initial_chains[1],
-+ [NF_BR_LOCAL_OUT]&initial_chains[2] }, 0, NULL, (char *)initial_chains
-+};
-+
-+static int check(const struct ebt_table_info *info, unsigned int valid_hooks)
-+{
-+ if (valid_hooks & ~FILTER_VALID_HOOKS)
-+ return -EINVAL;
-+ return 0;
-+}
-+
-+static struct ebt_table frame_filter =
-+{
-+ {NULL, NULL}, "filter", &initial_table, FILTER_VALID_HOOKS,
-+ RW_LOCK_UNLOCKED, check, NULL
-+};
-+
-+static unsigned int
-+ebt_hook (unsigned int hook, struct sk_buff **pskb, const struct net_device *in,
-+ const struct net_device *out, int (*okfn)(struct sk_buff *))
-+{
-+ return ebt_do_table(hook, pskb, in, out, &frame_filter);
-+}
-+
-+static struct nf_hook_ops ebt_ops_filter[] = {
-+ { { NULL, NULL }, ebt_hook, PF_BRIDGE, NF_BR_LOCAL_IN,
-+ NF_BR_PRI_FILTER_BRIDGED},
-+ { { NULL, NULL }, ebt_hook, PF_BRIDGE, NF_BR_FORWARD,
-+ NF_BR_PRI_FILTER_BRIDGED},
-+ { { NULL, NULL }, ebt_hook, PF_BRIDGE, NF_BR_LOCAL_OUT,
-+ NF_BR_PRI_FILTER_OTHER}
-+};
-+
-+static int __init init(void)
-+{
-+ int i, j, ret;
-+
-+ ret = ebt_register_table(&frame_filter);
-+ if (ret < 0)
-+ return ret;
-+ for (i = 0; i < sizeof(ebt_ops_filter) / sizeof(ebt_ops_filter[0]); i++)
-+ if ((ret = nf_register_hook(&ebt_ops_filter[i])) < 0)
-+ goto cleanup;
-+ return ret;
-+cleanup:
-+ for (j = 0; j < i; j++)
-+ nf_unregister_hook(&ebt_ops_filter[j]);
-+ ebt_unregister_table(&frame_filter);
-+ return ret;
-+}
-+
-+static void __exit fini(void)
-+{
-+ int i;
-+
-+ for (i = 0; i < sizeof(ebt_ops_filter) / sizeof(ebt_ops_filter[0]); i++)
-+ nf_unregister_hook(&ebt_ops_filter[i]);
-+ ebt_unregister_table(&frame_filter);
-+}
-+
-+module_init(init);
-+module_exit(fini);
-+EXPORT_NO_SYMBOLS;
-+MODULE_LICENSE("GPL");
---- /dev/null Thu Aug 24 11:00:32 2000
-+++ linux-2.4.21-ebt-brnf-3/net/bridge/netfilter/ebtable_nat.c Fri Aug 8 01:09:06 2003
-@@ -0,0 +1,96 @@
-+/*
-+ * ebtable_nat
-+ *
-+ * Authors:
-+ * Bart De Schuymer <bart.de.schuymer@pandora.be>
-+ *
-+ * April, 2002
-+ *
-+ */
-+
-+#include <linux/netfilter_bridge/ebtables.h>
-+#include <linux/module.h>
-+#define NAT_VALID_HOOKS ((1 << NF_BR_PRE_ROUTING) | (1 << NF_BR_LOCAL_OUT) | \
-+ (1 << NF_BR_POST_ROUTING))
-+
-+static struct ebt_entries initial_chains[] =
-+{
-+ {0, "PREROUTING", 0, EBT_ACCEPT, 0},
-+ {0, "OUTPUT", 0, EBT_ACCEPT, 0},
-+ {0, "POSTROUTING", 0, EBT_ACCEPT, 0}
-+};
-+
-+static struct ebt_replace initial_table =
-+{
-+ "nat", NAT_VALID_HOOKS, 0, 3 * sizeof(struct ebt_entries),
-+ { [NF_BR_PRE_ROUTING]&initial_chains[0], [NF_BR_LOCAL_OUT]&initial_chains[1],
-+ [NF_BR_POST_ROUTING]&initial_chains[2] }, 0, NULL, (char *)initial_chains
-+};
-+
-+static int check(const struct ebt_table_info *info, unsigned int valid_hooks)
-+{
-+ if (valid_hooks & ~NAT_VALID_HOOKS)
-+ return -EINVAL;
-+ return 0;
-+}
-+
-+static struct ebt_table frame_nat =
-+{
-+ {NULL, NULL}, "nat", &initial_table, NAT_VALID_HOOKS,
-+ RW_LOCK_UNLOCKED, check, NULL
-+};
-+
-+static unsigned int
-+ebt_nat_dst(unsigned int hook, struct sk_buff **pskb, const struct net_device *in
-+ , const struct net_device *out, int (*okfn)(struct sk_buff *))
-+{
-+ return ebt_do_table(hook, pskb, in, out, &frame_nat);
-+}
-+
-+static unsigned int
-+ebt_nat_src(unsigned int hook, struct sk_buff **pskb, const struct net_device *in
-+ , const struct net_device *out, int (*okfn)(struct sk_buff *))
-+{
-+ return ebt_do_table(hook, pskb, in, out, &frame_nat);
-+}
-+
-+static struct nf_hook_ops ebt_ops_nat[] = {
-+ { { NULL, NULL }, ebt_nat_dst, PF_BRIDGE, NF_BR_LOCAL_OUT,
-+ NF_BR_PRI_NAT_DST_OTHER},
-+ { { NULL, NULL }, ebt_nat_src, PF_BRIDGE, NF_BR_POST_ROUTING,
-+ NF_BR_PRI_NAT_SRC},
-+ { { NULL, NULL }, ebt_nat_dst, PF_BRIDGE, NF_BR_PRE_ROUTING,
-+ NF_BR_PRI_NAT_DST_BRIDGED},
-+};
-+
-+static int __init init(void)
-+{
-+ int i, ret, j;
-+
-+ ret = ebt_register_table(&frame_nat);
-+ if (ret < 0)
-+ return ret;
-+ for (i = 0; i < sizeof(ebt_ops_nat) / sizeof(ebt_ops_nat[0]); i++)
-+ if ((ret = nf_register_hook(&ebt_ops_nat[i])) < 0)
-+ goto cleanup;
-+ return ret;
-+cleanup:
-+ for (j = 0; j < i; j++)
-+ nf_unregister_hook(&ebt_ops_nat[j]);
-+ ebt_unregister_table(&frame_nat);
-+ return ret;
-+}
-+
-+static void __exit fini(void)
-+{
-+ int i;
-+
-+ for (i = 0; i < sizeof(ebt_ops_nat) / sizeof(ebt_ops_nat[0]); i++)
-+ nf_unregister_hook(&ebt_ops_nat[i]);
-+ ebt_unregister_table(&frame_nat);
-+}
-+
-+module_init(init);
-+module_exit(fini);
-+EXPORT_NO_SYMBOLS;
-+MODULE_LICENSE("GPL");
---- /dev/null Thu Aug 24 11:00:32 2000
-+++ linux-2.4.21-ebt-brnf-3/net/bridge/netfilter/ebtable_broute.c Fri Aug 8 01:09:06 2003
-@@ -0,0 +1,79 @@
-+/*
-+ * ebtable_broute
-+ *
-+ * Authors:
-+ * Bart De Schuymer <bart.de.schuymer@pandora.be>
-+ *
-+ * April, 2002
-+ *
-+ * This table lets you choose between routing and bridging for frames
-+ * entering on a bridge enslaved nic. This table is traversed before any
-+ * other ebtables table. See net/bridge/br_input.c.
-+ */
-+
-+#include <linux/netfilter_bridge/ebtables.h>
-+#include <linux/module.h>
-+#include <linux/if_bridge.h>
-+#include <linux/brlock.h>
-+
-+// EBT_ACCEPT means the frame will be bridged
-+// EBT_DROP means the frame will be routed
-+static struct ebt_entries initial_chain =
-+ {0, "BROUTING", 0, EBT_ACCEPT, 0};
-+
-+static struct ebt_replace initial_table =
-+{
-+ "broute", 1 << NF_BR_BROUTING, 0, sizeof(struct ebt_entries),
-+ { [NF_BR_BROUTING]&initial_chain}, 0, NULL, (char *)&initial_chain
-+};
-+
-+static int check(const struct ebt_table_info *info, unsigned int valid_hooks)
-+{
-+ if (valid_hooks & ~(1 << NF_BR_BROUTING))
-+ return -EINVAL;
-+ return 0;
-+}
-+
-+static struct ebt_table broute_table =
-+{
-+ {NULL, NULL}, "broute", &initial_table, 1 << NF_BR_BROUTING,
-+ RW_LOCK_UNLOCKED, check, NULL
-+};
-+
-+static int ebt_broute(struct sk_buff **pskb)
-+{
-+ int ret;
-+
-+ ret = ebt_do_table(NF_BR_BROUTING, pskb, (*pskb)->dev, NULL,
-+ &broute_table);
-+ if (ret == NF_DROP)
-+ return 1; // route it
-+ return 0; // bridge it
-+}
-+
-+static int __init init(void)
-+{
-+ int ret;
-+
-+ ret = ebt_register_table(&broute_table);
-+ if (ret < 0)
-+ return ret;
-+ br_write_lock_bh(BR_NETPROTO_LOCK);
-+ // see br_input.c
-+ br_should_route_hook = ebt_broute;
-+ br_write_unlock_bh(BR_NETPROTO_LOCK);
-+ return ret;
-+}
-+
-+static void __exit fini(void)
-+{
-+ br_write_lock_bh(BR_NETPROTO_LOCK);
-+ br_should_route_hook = NULL;
-+ br_write_unlock_bh(BR_NETPROTO_LOCK);
-+ ebt_unregister_table(&broute_table);
-+}
-+
-+module_init(init);
-+module_exit(fini);
-+EXPORT_NO_SYMBOLS;
-+MODULE_LICENSE("GPL");
---- /dev/null Thu Aug 24 11:00:32 2000
-+++ linux-2.4.21-ebt-brnf-3/net/bridge/netfilter/ebt_802_3.c Fri Aug 8 01:09:06 2003
-@@ -0,0 +1,74 @@
-+/*
-+ * 802_3
-+ *
-+ * Author:
-+ * Chris Vitale csv@bluetail.com
-+ *
-+ * May 2003
-+ *
-+ */
-+
-+#include <linux/netfilter_bridge/ebtables.h>
-+#include <linux/netfilter_bridge/ebt_802_3.h>
-+#include <linux/module.h>
-+
-+static int ebt_filter_802_3(const struct sk_buff *skb, const struct net_device *in,
-+ const struct net_device *out, const void *data, unsigned int datalen)
-+{
-+ struct ebt_802_3_info *info = (struct ebt_802_3_info *)data;
-+ struct ebt_802_3_hdr *hdr = (struct ebt_802_3_hdr *)skb->mac.ethernet;
-+ uint16_t type = hdr->llc.ui.ctrl & IS_UI ? hdr->llc.ui.type : hdr->llc.ni.type;
-+
-+ if (info->bitmask & EBT_802_3_SAP) {
-+ if (FWINV(info->sap != hdr->llc.ui.ssap, EBT_802_3_SAP))
-+ return EBT_NOMATCH;
-+ if (FWINV(info->sap != hdr->llc.ui.dsap, EBT_802_3_SAP))
-+ return EBT_NOMATCH;
-+ }
-+
-+ if (info->bitmask & EBT_802_3_TYPE) {
-+ if (!(hdr->llc.ui.dsap == CHECK_TYPE && hdr->llc.ui.ssap == CHECK_TYPE))
-+ return EBT_NOMATCH;
-+ if (FWINV(info->type != type, EBT_802_3_TYPE))
-+ return EBT_NOMATCH;
-+ }
-+
-+ return EBT_MATCH;
-+}
-+
-+static struct ebt_match filter_802_3;
-+static int ebt_802_3_check(const char *tablename, unsigned int hookmask,
-+ const struct ebt_entry *e, void *data, unsigned int datalen)
-+{
-+ struct ebt_802_3_info *info = (struct ebt_802_3_info *)data;
-+
-+ if (datalen != EBT_ALIGN(sizeof(struct ebt_802_3_info)))
-+ return -EINVAL;
-+ if (info->bitmask & ~EBT_802_3_MASK || info->invflags & ~EBT_802_3_MASK)
-+ return -EINVAL;
-+
-+ return 0;
-+}
-+
-+static struct ebt_match filter_802_3 =
-+{
-+ .name = EBT_802_3_MATCH,
-+ .match = ebt_filter_802_3,
-+ .check = ebt_802_3_check,
-+ .me = THIS_MODULE,
-+};
-+
-+static int __init init(void)
-+{
-+ return ebt_register_match(&filter_802_3);
-+}
-+
-+static void __exit fini(void)
-+{
-+ ebt_unregister_match(&filter_802_3);
-+}
-+
-+module_init(init);
-+module_exit(fini);
-+EXPORT_NO_SYMBOLS;
-+MODULE_LICENSE("GPL");
---- /dev/null Thu Aug 24 11:00:32 2000
-+++ linux-2.4.21-ebt-brnf-3/net/bridge/netfilter/ebt_mark.c Fri Aug 8 01:09:06 2003
-@@ -0,0 +1,66 @@
-+/*
-+ * ebt_mark
-+ *
-+ * Authors:
-+ * Bart De Schuymer <bart.de.schuymer@pandora.be>
-+ *
-+ * July, 2002
-+ *
-+ */
-+
-+// The mark target can be used in any chain
-+// I believe adding a mangle table just for marking is total overkill
-+// Marking a frame doesn't really change anything in the frame anyway
-+
-+#include <linux/netfilter_bridge/ebtables.h>
-+#include <linux/netfilter_bridge/ebt_mark_t.h>
-+#include <linux/module.h>
-+
-+static int ebt_target_mark(struct sk_buff **pskb, unsigned int hooknr,
-+ const struct net_device *in, const struct net_device *out,
-+ const void *data, unsigned int datalen)
-+{
-+ struct ebt_mark_t_info *info = (struct ebt_mark_t_info *)data;
-+
-+ if ((*pskb)->nfmark != info->mark) {
-+ (*pskb)->nfmark = info->mark;
-+ (*pskb)->nfcache |= NFC_ALTERED;
-+ }
-+ return info->target;
-+}
-+
-+static int ebt_target_mark_check(const char *tablename, unsigned int hookmask,
-+ const struct ebt_entry *e, void *data, unsigned int datalen)
-+{
-+ struct ebt_mark_t_info *info = (struct ebt_mark_t_info *)data;
-+
-+ if (datalen != EBT_ALIGN(sizeof(struct ebt_mark_t_info)))
-+ return -EINVAL;
-+ if (BASE_CHAIN && info->target == EBT_RETURN)
-+ return -EINVAL;
-+ CLEAR_BASE_CHAIN_BIT;
-+ if (INVALID_TARGET)
-+ return -EINVAL;
-+ return 0;
-+}
-+
-+static struct ebt_target mark_target =
-+{
-+ {NULL, NULL}, EBT_MARK_TARGET, ebt_target_mark,
-+ ebt_target_mark_check, NULL, THIS_MODULE
-+};
-+
-+static int __init init(void)
-+{
-+ return ebt_register_target(&mark_target);
-+}
-+
-+static void __exit fini(void)
-+{
-+ ebt_unregister_target(&mark_target);
-+}
-+
-+module_init(init);
-+module_exit(fini);
-+EXPORT_NO_SYMBOLS;
-+MODULE_LICENSE("GPL");
---- /dev/null Thu Aug 24 11:00:32 2000
-+++ linux-2.4.21-ebt-brnf-3/net/bridge/netfilter/ebt_mark_m.c Fri Aug 8 01:09:06 2003
-@@ -0,0 +1,61 @@
-+/*
-+ * ebt_mark_m
-+ *
-+ * Authors:
-+ * Bart De Schuymer <bart.de.schuymer@pandora.be>
-+ *
-+ * July, 2002
-+ *
-+ */
-+
-+#include <linux/netfilter_bridge/ebtables.h>
-+#include <linux/netfilter_bridge/ebt_mark_m.h>
-+#include <linux/module.h>
-+
-+static int ebt_filter_mark(const struct sk_buff *skb,
-+ const struct net_device *in, const struct net_device *out, const void *data,
-+ unsigned int datalen)
-+{
-+ struct ebt_mark_m_info *info = (struct ebt_mark_m_info *) data;
-+
-+ if (info->bitmask & EBT_MARK_OR)
-+ return !(!!(skb->nfmark & info->mask) ^ info->invert);
-+ return !(((skb->nfmark & info->mask) == info->mark) ^ info->invert);
-+}
-+
-+static int ebt_mark_check(const char *tablename, unsigned int hookmask,
-+ const struct ebt_entry *e, void *data, unsigned int datalen)
-+{
-+ struct ebt_mark_m_info *info = (struct ebt_mark_m_info *) data;
-+
-+ if (datalen != EBT_ALIGN(sizeof(struct ebt_mark_m_info)))
-+ return -EINVAL;
-+ if (info->bitmask & ~EBT_MARK_MASK)
-+ return -EINVAL;
-+ if ((info->bitmask & EBT_MARK_OR) && (info->bitmask & EBT_MARK_AND))
-+ return -EINVAL;
-+ if (!info->bitmask)
-+ return -EINVAL;
-+ return 0;
-+}
-+
-+static struct ebt_match filter_mark =
-+{
-+ {NULL, NULL}, EBT_MARK_MATCH, ebt_filter_mark, ebt_mark_check, NULL,
-+ THIS_MODULE
-+};
-+
-+static int __init init(void)
-+{
-+ return ebt_register_match(&filter_mark);
-+}
-+
-+static void __exit fini(void)
-+{
-+ ebt_unregister_match(&filter_mark);
-+}
-+
-+module_init(init);
-+module_exit(fini);
-+EXPORT_NO_SYMBOLS;
-+MODULE_LICENSE("GPL");
---- /dev/null Thu Aug 24 11:00:32 2000
-+++ linux-2.4.21-ebt-brnf-3/net/bridge/netfilter/ebt_pkttype.c Fri Aug 8 01:09:06 2003
-@@ -0,0 +1,60 @@
-+/*
-+ * ebt_pkttype
-+ *
-+ * Authors:
-+ * Bart De Schuymer <bdschuym@pandora.be>
-+ *
-+ * April, 2003
-+ *
-+ */
-+
-+#include <linux/netfilter_bridge/ebtables.h>
-+#include <linux/netfilter_bridge/ebt_pkttype.h>
-+#include <linux/module.h>
-+
-+static int ebt_filter_pkttype(const struct sk_buff *skb,
-+ const struct net_device *in,
-+ const struct net_device *out,
-+ const void *data,
-+ unsigned int datalen)
-+{
-+ struct ebt_pkttype_info *info = (struct ebt_pkttype_info *)data;
-+
-+ return (skb->pkt_type != info->pkt_type) ^ info->invert;
-+}
-+
-+static int ebt_pkttype_check(const char *tablename, unsigned int hookmask,
-+ const struct ebt_entry *e, void *data, unsigned int datalen)
-+{
-+ struct ebt_pkttype_info *info = (struct ebt_pkttype_info *)data;
-+
-+ if (datalen != EBT_ALIGN(sizeof(struct ebt_pkttype_info)))
-+ return -EINVAL;
-+ if (info->invert != 0 && info->invert != 1)
-+ return -EINVAL;
-+ /* Allow any pkt_type value */
-+ return 0;
-+}
-+
-+static struct ebt_match filter_pkttype =
-+{
-+ .name = EBT_PKTTYPE_MATCH,
-+ .match = ebt_filter_pkttype,
-+ .check = ebt_pkttype_check,
-+ .me = THIS_MODULE,
-+};
-+
-+static int __init init(void)
-+{
-+ return ebt_register_match(&filter_pkttype);
-+}
-+
-+static void __exit fini(void)
-+{
-+ ebt_unregister_match(&filter_pkttype);
-+}
-+
-+module_init(init);
-+module_exit(fini);
-+EXPORT_NO_SYMBOLS;
-+MODULE_LICENSE("GPL");
---- /dev/null Thu Aug 24 11:00:32 2000
-+++ linux-2.4.21-ebt-brnf-3/net/bridge/netfilter/ebt_stp.c Fri Aug 8 01:09:06 2003
-@@ -0,0 +1,191 @@
-+/*
-+ * ebt_stp
-+ *
-+ * Authors:
-+ * Bart De Schuymer <bdschuym@pandora.be>
-+ * Stephen Hemminger <shemminger@osdl.org>
-+ *
-+ * June, 2003
-+ */
-+
-+#include <linux/netfilter_bridge/ebtables.h>
-+#include <linux/netfilter_bridge/ebt_stp.h>
-+#include <linux/module.h>
-+
-+#define BPDU_TYPE_CONFIG 0
-+#define BPDU_TYPE_TCN 0x80
-+
-+struct stp_header {
-+ uint8_t dsap;
-+ uint8_t ssap;
-+ uint8_t ctrl;
-+ uint8_t pid;
-+ uint8_t vers;
-+ uint8_t type;
-+};
-+
-+struct stp_config_pdu {
-+ uint8_t flags;
-+ uint8_t root[8];
-+ uint8_t root_cost[4];
-+ uint8_t sender[8];
-+ uint8_t port[2];
-+ uint8_t msg_age[2];
-+ uint8_t max_age[2];
-+ uint8_t hello_time[2];
-+ uint8_t forward_delay[2];
-+};
-+
-+#define NR16(p) (p[0] << 8 | p[1])
-+#define NR32(p) ((p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3])
-+
-+static int ebt_filter_config(struct ebt_stp_info *info,
-+ struct stp_config_pdu *stpc)
-+{
-+ struct ebt_stp_config_info *c;
-+ uint16_t v16;
-+ uint32_t v32;
-+ int verdict, i;
-+
-+ c = &info->config;
-+ if ((info->bitmask & EBT_STP_FLAGS) &&
-+ FWINV(c->flags != stpc->flags, EBT_STP_FLAGS))
-+ return EBT_NOMATCH;
-+ if (info->bitmask & EBT_STP_ROOTPRIO) {
-+ v16 = NR16(stpc->root);
-+ if (FWINV(v16 < c->root_priol ||
-+ v16 > c->root_priou, EBT_STP_ROOTPRIO))
-+ return EBT_NOMATCH;
-+ }
-+ if (info->bitmask & EBT_STP_ROOTADDR) {
-+ verdict = 0;
-+ for (i = 0; i < 6; i++)
-+ verdict |= (stpc->root[2+i] ^ c->root_addr[i]) &
-+ c->root_addrmsk[i];
-+ if (FWINV(verdict != 0, EBT_STP_ROOTADDR))
-+ return EBT_NOMATCH;
-+ }
-+ if (info->bitmask & EBT_STP_ROOTCOST) {
-+ v32 = NR32(stpc->root_cost);
-+ if (FWINV(v32 < c->root_costl ||
-+ v32 > c->root_costu, EBT_STP_ROOTCOST))
-+ return EBT_NOMATCH;
-+ }
-+ if (info->bitmask & EBT_STP_SENDERPRIO) {
-+ v16 = NR16(stpc->sender);
-+ if (FWINV(v16 < c->sender_priol ||
-+ v16 > c->sender_priou, EBT_STP_SENDERPRIO))
-+ return EBT_NOMATCH;
-+ }
-+ if (info->bitmask & EBT_STP_SENDERADDR) {
-+ verdict = 0;
-+ for (i = 0; i < 6; i++)
-+ verdict |= (stpc->sender[2+i] ^ c->sender_addr[i]) &
-+ c->sender_addrmsk[i];
-+ if (FWINV(verdict != 0, EBT_STP_SENDERADDR))
-+ return EBT_NOMATCH;
-+ }
-+ if (info->bitmask & EBT_STP_PORT) {
-+ v16 = NR16(stpc->port);
-+ if (FWINV(v16 < c->portl ||
-+ v16 > c->portu, EBT_STP_PORT))
-+ return EBT_NOMATCH;
-+ }
-+ if (info->bitmask & EBT_STP_MSGAGE) {
-+ v16 = NR16(stpc->msg_age);
-+ if (FWINV(v16 < c->msg_agel ||
-+ v16 > c->msg_ageu, EBT_STP_MSGAGE))
-+ return EBT_NOMATCH;
-+ }
-+ if (info->bitmask & EBT_STP_MAXAGE) {
-+ v16 = NR16(stpc->max_age);
-+ if (FWINV(v16 < c->max_agel ||
-+ v16 > c->max_ageu, EBT_STP_MAXAGE))
-+ return EBT_NOMATCH;
-+ }
-+ if (info->bitmask & EBT_STP_HELLOTIME) {
-+ v16 = NR16(stpc->hello_time);
-+ if (FWINV(v16 < c->hello_timel ||
-+ v16 > c->hello_timeu, EBT_STP_HELLOTIME))
-+ return EBT_NOMATCH;
-+ }
-+ if (info->bitmask & EBT_STP_FWDD) {
-+ v16 = NR16(stpc->forward_delay);
-+ if (FWINV(v16 < c->forward_delayl ||
-+ v16 > c->forward_delayu, EBT_STP_FWDD))
-+ return EBT_NOMATCH;
-+ }
-+ return EBT_MATCH;
-+}
-+
-+static int ebt_filter_stp(const struct sk_buff *skb, const struct net_device *in,
-+ const struct net_device *out, const void *data, unsigned int datalen)
-+{
-+ struct ebt_stp_info *info = (struct ebt_stp_info *)data;
-+ struct stp_header stph;
-+ uint8_t header[6] = {0x42, 0x42, 0x03, 0x00, 0x00, 0x00};
-+ if (skb_copy_bits(skb, 0, &stph, sizeof(stph)))
-+ return EBT_NOMATCH;
-+
-+ /* The stp code only considers these */
-+ if (memcmp(&stph, header, sizeof(header)))
-+ return EBT_NOMATCH;
-+
-+ if (info->bitmask & EBT_STP_TYPE
-+ && FWINV(info->type != stph.type, EBT_STP_TYPE))
-+ return EBT_NOMATCH;
-+
-+ if (stph.type == BPDU_TYPE_CONFIG &&
-+ info->bitmask & EBT_STP_CONFIG_MASK) {
-+ struct stp_config_pdu stpc;
-+
-+ if (skb_copy_bits(skb, sizeof(stph), &stpc, sizeof(stpc)))
-+ return EBT_NOMATCH;
-+ return ebt_filter_config(info, &stpc);
-+ }
-+ return EBT_MATCH;
-+}
-+
-+static int ebt_stp_check(const char *tablename, unsigned int hookmask,
-+ const struct ebt_entry *e, void *data, unsigned int datalen)
-+{
-+ struct ebt_stp_info *info = (struct ebt_stp_info *)data;
-+ int len = EBT_ALIGN(sizeof(struct ebt_stp_info));
-+ uint8_t bridge_ula[6] = { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x00 };
-+ uint8_t msk[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
-+
-+ if (info->bitmask & ~EBT_STP_MASK || info->invflags & ~EBT_STP_MASK ||
-+ !(info->bitmask & EBT_STP_MASK))
-+ return -EINVAL;
-+ if (datalen != len)
-+ return -EINVAL;
-+ /* Make sure the match only receives stp frames */
-+ if (memcmp(e->destmac, bridge_ula, ETH_ALEN) ||
-+ memcmp(e->destmsk, msk, ETH_ALEN) || !(e->bitmask & EBT_DESTMAC))
-+ return -EINVAL;
-+
-+ return 0;
-+}
-+
-+static struct ebt_match filter_stp =
-+{
-+ .name = EBT_STP_MATCH,
-+ .match = ebt_filter_stp,
-+ .check = ebt_stp_check,
-+ .me = THIS_MODULE,
-+};
-+
-+static int __init init(void)
-+{
-+ return ebt_register_match(&filter_stp);
-+}
-+
-+static void __exit fini(void)
-+{
-+ ebt_unregister_match(&filter_stp);
-+}
-+
-+module_init(init);
-+module_exit(fini);
-+EXPORT_NO_SYMBOLS;
-+MODULE_LICENSE("GPL");
---- /dev/null Thu Aug 24 11:00:32 2000
-+++ linux-2.4.21-ebt-brnf-3/net/bridge/netfilter/ebt_redirect.c Fri Aug 8 01:09:06 2003
-@@ -0,0 +1,71 @@
-+/*
-+ * ebt_redirect
-+ *
-+ * Authors:
-+ * Bart De Schuymer <bart.de.schuymer@pandora.be>
-+ *
-+ * April, 2002
-+ *
-+ */
-+
-+#include <linux/netfilter_bridge/ebtables.h>
-+#include <linux/netfilter_bridge/ebt_redirect.h>
-+#include <linux/module.h>
-+#include <net/sock.h>
-+#include "../br_private.h"
-+
-+static int ebt_target_redirect(struct sk_buff **pskb, unsigned int hooknr,
-+ const struct net_device *in, const struct net_device *out,
-+ const void *data, unsigned int datalen)
-+{
-+ struct ebt_redirect_info *info = (struct ebt_redirect_info *)data;
-+
-+ if (hooknr != NF_BR_BROUTING)
-+ memcpy((**pskb).mac.ethernet->h_dest,
-+ in->br_port->br->dev.dev_addr, ETH_ALEN);
-+ else {
-+ memcpy((**pskb).mac.ethernet->h_dest,
-+ in->dev_addr, ETH_ALEN);
-+ (*pskb)->pkt_type = PACKET_HOST;
-+ }
-+ return info->target;
-+}
-+
-+static int ebt_target_redirect_check(const char *tablename, unsigned int hookmask,
-+ const struct ebt_entry *e, void *data, unsigned int datalen)
-+{
-+ struct ebt_redirect_info *info = (struct ebt_redirect_info *)data;
-+
-+ if (datalen != EBT_ALIGN(sizeof(struct ebt_redirect_info)))
-+ return -EINVAL;
-+ if (BASE_CHAIN && info->target == EBT_RETURN)
-+ return -EINVAL;
-+ CLEAR_BASE_CHAIN_BIT;
-+ if ( (strcmp(tablename, "nat") || hookmask & ~(1 << NF_BR_PRE_ROUTING)) &&
-+ (strcmp(tablename, "broute") || hookmask & ~(1 << NF_BR_BROUTING)) )
-+ return -EINVAL;
-+ if (INVALID_TARGET)
-+ return -EINVAL;
-+ return 0;
-+}
-+
-+static struct ebt_target redirect_target =
-+{
-+ {NULL, NULL}, EBT_REDIRECT_TARGET, ebt_target_redirect,
-+ ebt_target_redirect_check, NULL, THIS_MODULE
-+};
-+
-+static int __init init(void)
-+{
-+ return ebt_register_target(&redirect_target);
-+}
-+
-+static void __exit fini(void)
-+{
-+ ebt_unregister_target(&redirect_target);
-+}
-+
-+module_init(init);
-+module_exit(fini);
-+EXPORT_NO_SYMBOLS;
-+MODULE_LICENSE("GPL");
---- /dev/null Thu Aug 24 11:00:32 2000
-+++ linux-2.4.21-ebt-brnf-3/net/bridge/netfilter/ebt_arp.c Fri Aug 8 01:09:06 2003
-@@ -0,0 +1,149 @@
-+/*
-+ * ebt_arp
-+ *
-+ * Authors:
-+ * Bart De Schuymer <bart.de.schuymer@pandora.be>
-+ * Tim Gardner <timg@tpi.com>
-+ *
-+ * April, 2002
-+ *
-+ */
-+
-+#include <linux/netfilter_bridge/ebtables.h>
-+#include <linux/netfilter_bridge/ebt_arp.h>
-+#include <linux/if_arp.h>
-+#include <linux/if_ether.h>
-+#include <linux/module.h>
-+
-+static int ebt_filter_arp(const struct sk_buff *skb, const struct net_device *in,
-+ const struct net_device *out, const void *data, unsigned int datalen)
-+{
-+ struct ebt_arp_info *info = (struct ebt_arp_info *)data;
-+
-+ if (info->bitmask & EBT_ARP_OPCODE && FWINV(info->opcode !=
-+ ((*skb).nh.arph)->ar_op, EBT_ARP_OPCODE))
-+ return EBT_NOMATCH;
-+ if (info->bitmask & EBT_ARP_HTYPE && FWINV(info->htype !=
-+ ((*skb).nh.arph)->ar_hrd, EBT_ARP_HTYPE))
-+ return EBT_NOMATCH;
-+ if (info->bitmask & EBT_ARP_PTYPE && FWINV(info->ptype !=
-+ ((*skb).nh.arph)->ar_pro, EBT_ARP_PTYPE))
-+ return EBT_NOMATCH;
-+
-+ if (info->bitmask & (EBT_ARP_SRC_IP | EBT_ARP_DST_IP))
-+ {
-+ uint32_t arp_len = sizeof(struct arphdr) +
-+ (2 * (((*skb).nh.arph)->ar_hln)) +
-+ (2 * (((*skb).nh.arph)->ar_pln));
-+ uint32_t dst;
-+ uint32_t src;
-+
-+ // Make sure the packet is long enough.
-+ if ((((*skb).nh.raw) + arp_len) > (*skb).tail)
-+ return EBT_NOMATCH;
-+ // IPv4 addresses are always 4 bytes.
-+ if (((*skb).nh.arph)->ar_pln != sizeof(uint32_t))
-+ return EBT_NOMATCH;
-+
-+ if (info->bitmask & EBT_ARP_SRC_IP) {
-+ memcpy(&src, ((*skb).nh.raw) + sizeof(struct arphdr) +
-+ ((*skb).nh.arph)->ar_hln, sizeof(uint32_t));
-+ if (FWINV(info->saddr != (src & info->smsk),
-+ EBT_ARP_SRC_IP))
-+ return EBT_NOMATCH;
-+ }
-+
-+ if (info->bitmask & EBT_ARP_DST_IP) {
-+ memcpy(&dst, ((*skb).nh.raw)+sizeof(struct arphdr) +
-+ (2*(((*skb).nh.arph)->ar_hln)) +
-+ (((*skb).nh.arph)->ar_pln), sizeof(uint32_t));
-+ if (FWINV(info->daddr != (dst & info->dmsk),
-+ EBT_ARP_DST_IP))
-+ return EBT_NOMATCH;
-+ }
-+ }
-+
-+ if (info->bitmask & (EBT_ARP_SRC_MAC | EBT_ARP_DST_MAC))
-+ {
-+ uint32_t arp_len = sizeof(struct arphdr) +
-+ (2 * (((*skb).nh.arph)->ar_hln)) +
-+ (2 * (((*skb).nh.arph)->ar_pln));
-+ unsigned char dst[ETH_ALEN];
-+ unsigned char src[ETH_ALEN];
-+
-+ // Make sure the packet is long enough.
-+ if ((((*skb).nh.raw) + arp_len) > (*skb).tail)
-+ return EBT_NOMATCH;
-+ // MAC addresses are 6 bytes.
-+ if (((*skb).nh.arph)->ar_hln != ETH_ALEN)
-+ return EBT_NOMATCH;
-+ if (info->bitmask & EBT_ARP_SRC_MAC) {
-+ uint8_t verdict, i;
-+
-+ memcpy(&src, ((*skb).nh.raw) +
-+ sizeof(struct arphdr),
-+ ETH_ALEN);
-+ verdict = 0;
-+ for (i = 0; i < 6; i++)
-+ verdict |= (src[i] ^ info->smaddr[i]) &
-+ info->smmsk[i];
-+ if (FWINV(verdict != 0, EBT_ARP_SRC_MAC))
-+ return EBT_NOMATCH;
-+ }
-+
-+ if (info->bitmask & EBT_ARP_DST_MAC) {
-+ uint8_t verdict, i;
-+
-+ memcpy(&dst, ((*skb).nh.raw) +
-+ sizeof(struct arphdr) +
-+ (((*skb).nh.arph)->ar_hln) +
-+ (((*skb).nh.arph)->ar_pln),
-+ ETH_ALEN);
-+ verdict = 0;
-+ for (i = 0; i < 6; i++)
-+ verdict |= (dst[i] ^ info->dmaddr[i]) &
-+ info->dmmsk[i];
-+ if (FWINV(verdict != 0, EBT_ARP_DST_MAC))
-+ return EBT_NOMATCH;
-+ }
-+ }
-+
-+ return EBT_MATCH;
-+}
-+
-+static int ebt_arp_check(const char *tablename, unsigned int hookmask,
-+ const struct ebt_entry *e, void *data, unsigned int datalen)
-+{
-+ struct ebt_arp_info *info = (struct ebt_arp_info *)data;
-+
-+ if (datalen != EBT_ALIGN(sizeof(struct ebt_arp_info)))
-+ return -EINVAL;
-+ if ((e->ethproto != __constant_htons(ETH_P_ARP) &&
-+ e->ethproto != __constant_htons(ETH_P_RARP)) ||
-+ e->invflags & EBT_IPROTO)
-+ return -EINVAL;
-+ if (info->bitmask & ~EBT_ARP_MASK || info->invflags & ~EBT_ARP_MASK)
-+ return -EINVAL;
-+ return 0;
-+}
-+
-+static struct ebt_match filter_arp =
-+{
-+ {NULL, NULL}, EBT_ARP_MATCH, ebt_filter_arp, ebt_arp_check, NULL,
-+ THIS_MODULE
-+};
-+
-+static int __init init(void)
-+{
-+ return ebt_register_match(&filter_arp);
-+}
-+
-+static void __exit fini(void)
-+{
-+ ebt_unregister_match(&filter_arp);
-+}
-+
-+module_init(init);
-+module_exit(fini);
-+EXPORT_NO_SYMBOLS;
-+MODULE_LICENSE("GPL");
---- /dev/null Thu Aug 24 11:00:32 2000
-+++ linux-2.4.21-ebt-brnf-3/net/bridge/netfilter/ebt_ip.c Fri Aug 8 01:09:06 2003
-@@ -0,0 +1,121 @@
-+/*
-+ * ebt_ip
-+ *
-+ * Authors:
-+ * Bart De Schuymer <bart.de.schuymer@pandora.be>
-+ *
-+ * April, 2002
-+ *
-+ * Changes:
-+ * added ip-sport and ip-dport
-+ * Innominate Security Technologies AG <mhopf@innominate.com>
-+ * September, 2002
-+ */
-+
-+#include <linux/netfilter_bridge/ebtables.h>
-+#include <linux/netfilter_bridge/ebt_ip.h>
-+#include <linux/ip.h>
-+#include <linux/in.h>
-+#include <linux/module.h>
-+
-+struct tcpudphdr {
-+ uint16_t src;
-+ uint16_t dst;
-+};
-+
-+union h_u {
-+ unsigned char *raw;
-+ struct tcpudphdr *tuh;
-+};
-+
-+static int ebt_filter_ip(const struct sk_buff *skb, const struct net_device *in,
-+ const struct net_device *out, const void *data,
-+ unsigned int datalen)
-+{
-+ struct ebt_ip_info *info = (struct ebt_ip_info *)data;
-+
-+ if (info->bitmask & EBT_IP_TOS &&
-+ FWINV(info->tos != ((*skb).nh.iph)->tos, EBT_IP_TOS))
-+ return EBT_NOMATCH;
-+ if (info->bitmask & EBT_IP_PROTO) {
-+ if (FWINV(info->protocol != ((*skb).nh.iph)->protocol,
-+ EBT_IP_PROTO))
-+ return EBT_NOMATCH;
-+ if ( info->protocol == IPPROTO_TCP ||
-+ info->protocol == IPPROTO_UDP )
-+ {
-+ union h_u h;
-+ h.raw = skb->data + skb->nh.iph->ihl*4;
-+ if (info->bitmask & EBT_IP_DPORT) {
-+ uint16_t port = ntohs(h.tuh->dst);
-+ if (FWINV(port < info->dport[0] ||
-+ port > info->dport[1],
-+ EBT_IP_DPORT))
-+ return EBT_NOMATCH;
-+ }
-+ if (info->bitmask & EBT_IP_SPORT) {
-+ uint16_t port = ntohs(h.tuh->src);
-+ if (FWINV(port < info->sport[0] ||
-+ port > info->sport[1],
-+ EBT_IP_SPORT))
-+ return EBT_NOMATCH;
-+ }
-+ }
-+ }
-+ if (info->bitmask & EBT_IP_SOURCE &&
-+ FWINV((((*skb).nh.iph)->saddr & info->smsk) !=
-+ info->saddr, EBT_IP_SOURCE))
-+ return EBT_NOMATCH;
-+ if ((info->bitmask & EBT_IP_DEST) &&
-+ FWINV((((*skb).nh.iph)->daddr & info->dmsk) !=
-+ info->daddr, EBT_IP_DEST))
-+ return EBT_NOMATCH;
-+ return EBT_MATCH;
-+}
-+
-+static int ebt_ip_check(const char *tablename, unsigned int hookmask,
-+ const struct ebt_entry *e, void *data, unsigned int datalen)
-+{
-+ struct ebt_ip_info *info = (struct ebt_ip_info *)data;
-+
-+ if (datalen != EBT_ALIGN(sizeof(struct ebt_ip_info)))
-+ return -EINVAL;
-+ if (e->ethproto != __constant_htons(ETH_P_IP) ||
-+ e->invflags & EBT_IPROTO)
-+ return -EINVAL;
-+ if (info->bitmask & ~EBT_IP_MASK || info->invflags & ~EBT_IP_MASK)
-+ return -EINVAL;
-+ if (info->bitmask & (EBT_IP_DPORT | EBT_IP_SPORT)) {
-+ if (!info->bitmask & EBT_IPROTO)
-+ return -EINVAL;
-+ if (info->protocol != IPPROTO_TCP &&
-+ info->protocol != IPPROTO_UDP)
-+ return -EINVAL;
-+ }
-+ if (info->bitmask & EBT_IP_DPORT && info->dport[0] > info->dport[1])
-+ return -EINVAL;
-+ if (info->bitmask & EBT_IP_SPORT && info->sport[0] > info->sport[1])
-+ return -EINVAL;
-+ return 0;
-+}
-+
-+static struct ebt_match filter_ip =
-+{
-+ {NULL, NULL}, EBT_IP_MATCH, ebt_filter_ip, ebt_ip_check, NULL,
-+ THIS_MODULE
-+};
-+
-+static int __init init(void)
-+{
-+ return ebt_register_match(&filter_ip);
-+}
-+
-+static void __exit fini(void)
-+{
-+ ebt_unregister_match(&filter_ip);
-+}
-+
-+module_init(init);
-+module_exit(fini);
-+EXPORT_NO_SYMBOLS;
-+MODULE_LICENSE("GPL");
---- /dev/null Thu Aug 24 11:00:32 2000
-+++ linux-2.4.21-ebt-brnf-3/net/bridge/netfilter/ebt_vlan.c Fri Aug 8 01:09:06 2003
-@@ -0,0 +1,259 @@
-+/*
-+ * Description: EBTables 802.1Q match extension kernelspace module.
-+ * Authors: Nick Fedchik <nick@fedchik.org.ua>
-+ * Bart De Schuymer <bart.de.schuymer@pandora.be>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-+ */
-+
-+#include <linux/if_ether.h>
-+#include <linux/if_vlan.h>
-+#include <linux/module.h>
-+#include <linux/netfilter_bridge/ebtables.h>
-+#include <linux/netfilter_bridge/ebt_vlan.h>
-+
-+static unsigned char debug;
-+#define MODULE_VERSION "0.6"
-+
-+MODULE_PARM(debug, "0-1b");
-+MODULE_PARM_DESC(debug, "debug=1 is turn on debug messages");
-+MODULE_AUTHOR("Nick Fedchik <nick@fedchik.org.ua>");
-+MODULE_DESCRIPTION("802.1Q match module (ebtables extension), v"
-+ MODULE_VERSION);
-+MODULE_LICENSE("GPL");
-+
-+
-+#define DEBUG_MSG(args...) if (debug) printk (KERN_DEBUG "ebt_vlan: " args)
-+#define INV_FLAG(_inv_flag_) (info->invflags & _inv_flag_) ? "!" : ""
-+#define GET_BITMASK(_BIT_MASK_) info->bitmask & _BIT_MASK_
-+#define SET_BITMASK(_BIT_MASK_) info->bitmask |= _BIT_MASK_
-+#define EXIT_ON_MISMATCH(_MATCH_,_MASK_) if (!((info->_MATCH_ == _MATCH_)^!!(info->invflags & _MASK_))) return 1;
-+
-+/*
-+ * Function description: ebt_filter_vlan() is main engine for
-+ * checking passed 802.1Q frame according to
-+ * the passed extension parameters (in the *data buffer)
-+ * ebt_filter_vlan() is called after successfull check the rule params
-+ * by ebt_check_vlan() function.
-+ * Parameters:
-+ * const struct sk_buff *skb - pointer to passed ethernet frame buffer
-+ * const void *data - pointer to passed extension parameters
-+ * unsigned int datalen - length of passed *data buffer
-+ * const struct net_device *in -
-+ * const struct net_device *out -
-+ * const struct ebt_counter *c -
-+ * Returned values:
-+ * 0 - ok (all rule params matched)
-+ * 1 - miss (rule params not acceptable to the parsed frame)
-+ */
-+static int
-+ebt_filter_vlan(const struct sk_buff *skb,
-+ const struct net_device *in,
-+ const struct net_device *out,
-+ const void *data, unsigned int datalen)
-+{
-+ struct ebt_vlan_info *info = (struct ebt_vlan_info *) data; /* userspace data */
-+ struct vlan_ethhdr *frame = (struct vlan_ethhdr *) skb->mac.raw; /* Passed tagged frame */
-+
-+ unsigned short TCI; /* Whole TCI, given from parsed frame */
-+ unsigned short id; /* VLAN ID, given from frame TCI */
-+ unsigned char prio; /* user_priority, given from frame TCI */
-+ unsigned short encap; /* VLAN encapsulated Type/Length field, given from orig frame */
-+
-+ /*
-+ * Tag Control Information (TCI) consists of the following elements:
-+ * - User_priority. The user_priority field is three bits in length,
-+ * interpreted as a binary number.
-+ * - Canonical Format Indicator (CFI). The Canonical Format Indicator
-+ * (CFI) is a single bit flag value. Currently ignored.
-+ * - VLAN Identifier (VID). The VID is encoded as
-+ * an unsigned binary number.
-+ */
-+ TCI = ntohs(frame->h_vlan_TCI);
-+ id = TCI & VLAN_VID_MASK;
-+ prio = (TCI >> 13) & 0x7;
-+ encap = frame->h_vlan_encapsulated_proto;
-+
-+ /*
-+ * Checking VLAN Identifier (VID)
-+ */
-+ if (GET_BITMASK(EBT_VLAN_ID)) { /* Is VLAN ID parsed? */
-+ EXIT_ON_MISMATCH(id, EBT_VLAN_ID);
-+ }
-+ /*
-+ * Checking user_priority
-+ */
-+ if (GET_BITMASK(EBT_VLAN_PRIO)) { /* Is VLAN user_priority parsed? */
-+ EXIT_ON_MISMATCH(prio, EBT_VLAN_PRIO);
-+ }
-+ /*
-+ * Checking Encapsulated Proto (Length/Type) field
-+ */
-+ if (GET_BITMASK(EBT_VLAN_ENCAP)) { /* Is VLAN Encap parsed? */
-+ EXIT_ON_MISMATCH(encap, EBT_VLAN_ENCAP);
-+ }
-+ /*
-+ * All possible extension parameters was parsed.
-+ * If rule never returned by missmatch, then all ok.
-+ */
-+ return 0;
-+}
-+
-+/*
-+ * Function description: ebt_vlan_check() is called when userspace
-+ * delivers the table entry to the kernel,
-+ * and to check that userspace doesn't give a bad table.
-+ * Parameters:
-+ * const char *tablename - table name string
-+ * unsigned int hooknr - hook number
-+ * const struct ebt_entry *e - ebtables entry basic set
-+ * const void *data - pointer to passed extension parameters
-+ * unsigned int datalen - length of passed *data buffer
-+ * Returned values:
-+ * 0 - ok (all delivered rule params are correct)
-+ * 1 - miss (rule params is out of range, invalid, incompatible, etc.)
-+ */
-+static int
-+ebt_check_vlan(const char *tablename,
-+ unsigned int hooknr,
-+ const struct ebt_entry *e, void *data, unsigned int datalen)
-+{
-+ struct ebt_vlan_info *info = (struct ebt_vlan_info *) data;
-+
-+ /*
-+ * Parameters buffer overflow check
-+ */
-+ if (datalen != EBT_ALIGN(sizeof(struct ebt_vlan_info))) {
-+ DEBUG_MSG
-+ ("passed size %d is not eq to ebt_vlan_info (%d)\n",
-+ datalen, sizeof(struct ebt_vlan_info));
-+ return -EINVAL;
-+ }
-+
-+ /*
-+ * Is it 802.1Q frame checked?
-+ */
-+ if (e->ethproto != __constant_htons(ETH_P_8021Q)) {
-+ DEBUG_MSG
-+ ("passed entry proto %2.4X is not 802.1Q (8100)\n",
-+ (unsigned short) ntohs(e->ethproto));
-+ return -EINVAL;
-+ }
-+
-+ /*
-+ * Check for bitmask range
-+ * True if even one bit is out of mask
-+ */
-+ if (info->bitmask & ~EBT_VLAN_MASK) {
-+ DEBUG_MSG("bitmask %2X is out of mask (%2X)\n",
-+ info->bitmask, EBT_VLAN_MASK);
-+ return -EINVAL;
-+ }
-+
-+ /*
-+ * Check for inversion flags range
-+ */
-+ if (info->invflags & ~EBT_VLAN_MASK) {
-+ DEBUG_MSG("inversion flags %2X is out of mask (%2X)\n",
-+ info->invflags, EBT_VLAN_MASK);
-+ return -EINVAL;
-+ }
-+
-+ /*
-+ * Reserved VLAN ID (VID) values
-+ * -----------------------------
-+ * 0 - The null VLAN ID.
-+ * 1 - The default Port VID (PVID)
-+ * 0x0FFF - Reserved for implementation use.
-+ * if_vlan.h: VLAN_GROUP_ARRAY_LEN 4096.
-+ */
-+ if (GET_BITMASK(EBT_VLAN_ID)) { /* when vlan-id param was spec-ed */
-+ if (!!info->id) { /* if id!=0 => check vid range */
-+ if (info->id > VLAN_GROUP_ARRAY_LEN) {
-+ DEBUG_MSG
-+ ("id %d is out of range (1-4096)\n",
-+ info->id);
-+ return -EINVAL;
-+ }
-+ /*
-+ * Note: This is valid VLAN-tagged frame point.
-+ * Any value of user_priority are acceptable,
-+ * but should be ignored according to 802.1Q Std.
-+ * So we just drop the prio flag.
-+ */
-+ info->bitmask &= ~EBT_VLAN_PRIO;
-+ }
-+ /*
-+ * Else, id=0 (null VLAN ID) => user_priority range (any?)
-+ */
-+ }
-+
-+ if (GET_BITMASK(EBT_VLAN_PRIO)) {
-+ if ((unsigned char) info->prio > 7) {
-+ DEBUG_MSG
-+ ("prio %d is out of range (0-7)\n",
-+ info->prio);
-+ return -EINVAL;
-+ }
-+ }
-+ /*
-+ * Check for encapsulated proto range - it is possible to be
-+ * any value for u_short range.
-+ * if_ether.h: ETH_ZLEN 60 - Min. octets in frame sans FCS
-+ */
-+ if (GET_BITMASK(EBT_VLAN_ENCAP)) {
-+ if ((unsigned short) ntohs(info->encap) < ETH_ZLEN) {
-+ DEBUG_MSG
-+ ("encap frame length %d is less than minimal\n",
-+ ntohs(info->encap));
-+ return -EINVAL;
-+ }
-+ }
-+
-+ return 0;
-+}
-+
-+static struct ebt_match filter_vlan = {
-+ {NULL, NULL},
-+ EBT_VLAN_MATCH,
-+ ebt_filter_vlan,
-+ ebt_check_vlan,
-+ NULL,
-+ THIS_MODULE
-+};
-+
-+/*
-+ * Module initialization function.
-+ */
-+static int __init init(void)
-+{
-+ DEBUG_MSG("ebtables 802.1Q extension module v"
-+ MODULE_VERSION "\n");
-+ DEBUG_MSG("module debug=%d\n", !!debug);
-+ return ebt_register_match(&filter_vlan);
-+}
-+
-+/*
-+ * Module "finalization" function
-+ */
-+static void __exit fini(void)
-+{
-+ ebt_unregister_match(&filter_vlan);
-+}
-+
-+module_init(init);
-+module_exit(fini);
-+
-+EXPORT_NO_SYMBOLS;
---- /dev/null Thu Aug 24 11:00:32 2000
-+++ linux-2.4.21-ebt-brnf-3/net/bridge/netfilter/ebt_log.c Fri Aug 8 01:09:06 2003
-@@ -0,0 +1,152 @@
-+/*
-+ * ebt_log
-+ *
-+ * Authors:
-+ * Bart De Schuymer <bart.de.schuymer@pandora.be>
-+ *
-+ * April, 2002
-+ *
-+ */
-+
-+#include <linux/netfilter_bridge/ebtables.h>
-+#include <linux/netfilter_bridge/ebt_log.h>
-+#include <linux/module.h>
-+#include <linux/ip.h>
-+#include <linux/in.h>
-+#include <linux/if_arp.h>
-+#include <linux/spinlock.h>
-+
-+static spinlock_t ebt_log_lock = SPIN_LOCK_UNLOCKED;
-+
-+static int ebt_log_check(const char *tablename, unsigned int hookmask,
-+ const struct ebt_entry *e, void *data, unsigned int datalen)
-+{
-+ struct ebt_log_info *info = (struct ebt_log_info *)data;
-+
-+ if (datalen != EBT_ALIGN(sizeof(struct ebt_log_info)))
-+ return -EINVAL;
-+ if (info->bitmask & ~EBT_LOG_MASK)
-+ return -EINVAL;
-+ if (info->loglevel >= 8)
-+ return -EINVAL;
-+ info->prefix[EBT_LOG_PREFIX_SIZE - 1] = '\0';
-+ return 0;
-+}
-+
-+struct tcpudphdr
-+{
-+ uint16_t src;
-+ uint16_t dst;
-+};
-+
-+struct arppayload
-+{
-+ unsigned char mac_src[ETH_ALEN];
-+ unsigned char ip_src[4];
-+ unsigned char mac_dst[ETH_ALEN];
-+ unsigned char ip_dst[4];
-+};
-+
-+static void print_MAC(unsigned char *p)
-+{
-+ int i;
-+
-+ for (i = 0; i < ETH_ALEN; i++, p++)
-+ printk("%02x%c", *p, i == ETH_ALEN - 1 ? ' ':':');
-+}
-+
-+#define myNIPQUAD(a) a[0], a[1], a[2], a[3]
-+static void ebt_log(const struct sk_buff *skb, const struct net_device *in,
-+ const struct net_device *out, const void *data, unsigned int datalen)
-+{
-+ struct ebt_log_info *info = (struct ebt_log_info *)data;
-+ char level_string[4] = "< >";
-+ level_string[1] = '0' + info->loglevel;
-+
-+ spin_lock_bh(&ebt_log_lock);
-+ printk(level_string);
-+ printk("%s IN=%s OUT=%s ", info->prefix, in ? in->name : "",
-+ out ? out->name : "");
-+
-+ printk("MAC source = ");
-+ print_MAC((skb->mac.ethernet)->h_source);
-+ printk("MAC dest = ");
-+ print_MAC((skb->mac.ethernet)->h_dest);
-+
-+ printk("proto = 0x%04x", ntohs(((*skb).mac.ethernet)->h_proto));
-+
-+ if ((info->bitmask & EBT_LOG_IP) && skb->mac.ethernet->h_proto ==
-+ htons(ETH_P_IP)){
-+ struct iphdr *iph = skb->nh.iph;
-+ printk(" IP SRC=%u.%u.%u.%u IP DST=%u.%u.%u.%u,",
-+ NIPQUAD(iph->saddr), NIPQUAD(iph->daddr));
-+ printk(" IP tos=0x%02X, IP proto=%d", iph->tos, iph->protocol);
-+ if (iph->protocol == IPPROTO_TCP ||
-+ iph->protocol == IPPROTO_UDP) {
-+ struct tcpudphdr *ports = (struct tcpudphdr *)(skb->data + iph->ihl*4);
-+
-+ if (skb->data + iph->ihl*4 > skb->tail) {
-+ printk(" INCOMPLETE TCP/UDP header");
-+ goto out;
-+ }
-+ printk(" SPT=%u DPT=%u", ntohs(ports->src),
-+ ntohs(ports->dst));
-+ }
-+ goto out;
-+ }
-+
-+ if ((info->bitmask & EBT_LOG_ARP) &&
-+ ((skb->mac.ethernet->h_proto == __constant_htons(ETH_P_ARP)) ||
-+ (skb->mac.ethernet->h_proto == __constant_htons(ETH_P_RARP)))) {
-+ struct arphdr * arph = skb->nh.arph;
-+ printk(" ARP HTYPE=%d, PTYPE=0x%04x, OPCODE=%d",
-+ ntohs(arph->ar_hrd), ntohs(arph->ar_pro),
-+ ntohs(arph->ar_op));
-+ /* If it's for Ethernet and the lengths are OK,
-+ * then log the ARP payload */
-+ if (arph->ar_hrd == __constant_htons(1) &&
-+ arph->ar_hln == ETH_ALEN &&
-+ arph->ar_pln == sizeof(uint32_t)) {
-+ struct arppayload *arpp = (struct arppayload *)(skb->data + sizeof(*arph));
-+
-+ if (skb->data + sizeof(*arph) > skb->tail) {
-+ printk(" INCOMPLETE ARP header");
-+ goto out;
-+ }
-+
-+ printk(" ARP MAC SRC=");
-+ print_MAC(arpp->mac_src);
-+ printk(" ARP IP SRC=%u.%u.%u.%u",
-+ myNIPQUAD(arpp->ip_src));
-+ printk(" ARP MAC DST=");
-+ print_MAC(arpp->mac_dst);
-+ printk(" ARP IP DST=%u.%u.%u.%u",
-+ myNIPQUAD(arpp->ip_dst));
-+ }
-+
-+ }
-+out:
-+ printk("\n");
-+ spin_unlock_bh(&ebt_log_lock);
-+}
-+
-+static struct ebt_watcher log =
-+{
-+ {NULL, NULL}, EBT_LOG_WATCHER, ebt_log, ebt_log_check, NULL,
-+ THIS_MODULE
-+};
-+
-+static int __init init(void)
-+{
-+ return ebt_register_watcher(&log);
-+}
-+
-+static void __exit fini(void)
-+{
-+ ebt_unregister_watcher(&log);
-+}
-+
-+module_init(init);
-+module_exit(fini);
-+EXPORT_NO_SYMBOLS;
-+MODULE_LICENSE("GPL");
---- /dev/null Thu Aug 24 11:00:32 2000
-+++ linux-2.4.21-ebt-brnf-3/net/bridge/netfilter/ebt_snat.c Fri Aug 8 01:09:06 2003
-@@ -0,0 +1,64 @@
-+/*
-+ * ebt_snat
-+ *
-+ * Authors:
-+ * Bart De Schuymer <bart.de.schuymer@pandora.be>
-+ *
-+ * June, 2002
-+ *
-+ */
-+
-+#include <linux/netfilter_bridge/ebtables.h>
-+#include <linux/netfilter_bridge/ebt_nat.h>
-+#include <linux/module.h>
-+
-+static int ebt_target_snat(struct sk_buff **pskb, unsigned int hooknr,
-+ const struct net_device *in, const struct net_device *out,
-+ const void *data, unsigned int datalen)
-+{
-+ struct ebt_nat_info *info = (struct ebt_nat_info *) data;
-+
-+ memcpy(((**pskb).mac.ethernet)->h_source, info->mac,
-+ ETH_ALEN * sizeof(unsigned char));
-+ return info->target;
-+}
-+
-+static int ebt_target_snat_check(const char *tablename, unsigned int hookmask,
-+ const struct ebt_entry *e, void *data, unsigned int datalen)
-+{
-+ struct ebt_nat_info *info = (struct ebt_nat_info *) data;
-+
-+ if (datalen != EBT_ALIGN(sizeof(struct ebt_nat_info)))
-+ return -EINVAL;
-+ if (BASE_CHAIN && info->target == EBT_RETURN)
-+ return -EINVAL;
-+ CLEAR_BASE_CHAIN_BIT;
-+ if (strcmp(tablename, "nat"))
-+ return -EINVAL;
-+ if (hookmask & ~(1 << NF_BR_POST_ROUTING))
-+ return -EINVAL;
-+ if (INVALID_TARGET)
-+ return -EINVAL;
-+ return 0;
-+}
-+
-+static struct ebt_target snat =
-+{
-+ {NULL, NULL}, EBT_SNAT_TARGET, ebt_target_snat, ebt_target_snat_check,
-+ NULL, THIS_MODULE
-+};
-+
-+static int __init init(void)
-+{
-+ return ebt_register_target(&snat);
-+}
-+
-+static void __exit fini(void)
-+{
-+ ebt_unregister_target(&snat);
-+}
-+
-+module_init(init);
-+module_exit(fini);
-+EXPORT_NO_SYMBOLS;
-+MODULE_LICENSE("GPL");
---- /dev/null Thu Aug 24 11:00:32 2000
-+++ linux-2.4.21-ebt-brnf-3/net/bridge/netfilter/ebt_dnat.c Fri Aug 8 01:09:06 2003
-@@ -0,0 +1,65 @@
-+/*
-+ * ebt_dnat
-+ *
-+ * Authors:
-+ * Bart De Schuymer <bart.de.schuymer@pandora.be>
-+ *
-+ * June, 2002
-+ *
-+ */
-+
-+#include <linux/netfilter_bridge/ebtables.h>
-+#include <linux/netfilter_bridge/ebt_nat.h>
-+#include <linux/module.h>
-+#include <net/sock.h>
-+
-+static int ebt_target_dnat(struct sk_buff **pskb, unsigned int hooknr,
-+ const struct net_device *in, const struct net_device *out,
-+ const void *data, unsigned int datalen)
-+{
-+ struct ebt_nat_info *info = (struct ebt_nat_info *)data;
-+
-+ memcpy(((**pskb).mac.ethernet)->h_dest, info->mac,
-+ ETH_ALEN * sizeof(unsigned char));
-+ return info->target;
-+}
-+
-+static int ebt_target_dnat_check(const char *tablename, unsigned int hookmask,
-+ const struct ebt_entry *e, void *data, unsigned int datalen)
-+{
-+ struct ebt_nat_info *info = (struct ebt_nat_info *)data;
-+
-+ if (BASE_CHAIN && info->target == EBT_RETURN)
-+ return -EINVAL;
-+ CLEAR_BASE_CHAIN_BIT;
-+ if ( (strcmp(tablename, "nat") ||
-+ (hookmask & ~((1 << NF_BR_PRE_ROUTING) | (1 << NF_BR_LOCAL_OUT)))) &&
-+ (strcmp(tablename, "broute") || hookmask & ~(1 << NF_BR_BROUTING)) )
-+ return -EINVAL;
-+ if (datalen != EBT_ALIGN(sizeof(struct ebt_nat_info)))
-+ return -EINVAL;
-+ if (INVALID_TARGET)
-+ return -EINVAL;
-+ return 0;
-+}
-+
-+static struct ebt_target dnat =
-+{
-+ {NULL, NULL}, EBT_DNAT_TARGET, ebt_target_dnat, ebt_target_dnat_check,
-+ NULL, THIS_MODULE
-+};
-+
-+static int __init init(void)
-+{
-+ return ebt_register_target(&dnat);
-+}
-+
-+static void __exit fini(void)
-+{
-+ ebt_unregister_target(&dnat);
-+}
-+
-+module_init(init);
-+module_exit(fini);
-+EXPORT_NO_SYMBOLS;
-+MODULE_LICENSE("GPL");
---- /dev/null Thu Aug 24 11:00:32 2000
-+++ linux-2.4.21-ebt-brnf-3/net/bridge/netfilter/ebtables.c Fri Aug 8 01:09:06 2003
-@@ -0,0 +1,1490 @@
-+/*
-+ * ebtables
-+ *
-+ * Author:
-+ * Bart De Schuymer <bart.de.schuymer@pandora.be>
-+ *
-+ * ebtables.c,v 2.0, July, 2002
-+ *
-+ * This code is stongly inspired on the iptables code which is
-+ * Copyright (C) 1999 Paul `Rusty' Russell & Michael J. Neuling
-+ *
-+ * This program is free software; you can redistribute it and/or
-+ * modify it under the terms of the GNU General Public License
-+ * as published by the Free Software Foundation; either version
-+ * 2 of the License, or (at your option) any later version.
-+ */
-+
-+// used for print_string
-+#include <linux/sched.h>
-+#include <linux/tty.h>
-+
-+#include <linux/kmod.h>
-+#include <linux/module.h>
-+#include <linux/vmalloc.h>
-+#include <linux/netfilter_bridge/ebtables.h>
-+#include <linux/spinlock.h>
-+#include <asm/uaccess.h>
-+#include <linux/smp.h>
-+#include <net/sock.h>
-+// needed for logical [in,out]-dev filtering
-+#include "../br_private.h"
-+
-+// list_named_find
-+#define ASSERT_READ_LOCK(x)
-+#define ASSERT_WRITE_LOCK(x)
-+#include <linux/netfilter_ipv4/listhelp.h>
-+
-+#if 0 // use this for remote debugging
-+// Copyright (C) 1998 by Ori Pomerantz
-+// Print the string to the appropriate tty, the one
-+// the current task uses
-+static void print_string(char *str)
-+{
-+ struct tty_struct *my_tty;
-+
-+ /* The tty for the current task */
-+ my_tty = current->tty;
-+ if (my_tty != NULL) {
-+ (*(my_tty->driver).write)(my_tty, 0, str, strlen(str));
-+ (*(my_tty->driver).write)(my_tty, 0, "\015\012", 2);
-+ }
-+}
-+
-+#define BUGPRINT(args) print_string(args);
-+#else
-+#define BUGPRINT(format, args...) printk("kernel msg: ebtables bug: please "\
-+ "report to author: "format, ## args)
-+// #define BUGPRINT(format, args...)
-+#endif
-+#define MEMPRINT(format, args...) printk("kernel msg: ebtables "\
-+ ": out of memory: "format, ## args)
-+// #define MEMPRINT(format, args...)
-+
-+
-+
-+// Each cpu has its own set of counters, so there is no need for write_lock in
-+// the softirq
-+// For reading or updating the counters, the user context needs to
-+// get a write_lock
-+
-+// The size of each set of counters is altered to get cache alignment
-+#define SMP_ALIGN(x) (((x) + SMP_CACHE_BYTES-1) & ~(SMP_CACHE_BYTES-1))
-+#define COUNTER_OFFSET(n) (SMP_ALIGN(n * sizeof(struct ebt_counter)))
-+#define COUNTER_BASE(c, n, cpu) ((struct ebt_counter *)(((char *)c) + \
-+ COUNTER_OFFSET(n) * cpu))
-+
-+
-+
-+static DECLARE_MUTEX(ebt_mutex);
-+static LIST_HEAD(ebt_tables);
-+static LIST_HEAD(ebt_targets);
-+static LIST_HEAD(ebt_matches);
-+static LIST_HEAD(ebt_watchers);
-+
-+static struct ebt_target ebt_standard_target =
-+{ {NULL, NULL}, EBT_STANDARD_TARGET, NULL, NULL, NULL, NULL};
-+
-+static inline int ebt_do_watcher (struct ebt_entry_watcher *w,
-+ const struct sk_buff *skb, const struct net_device *in,
-+ const struct net_device *out)
-+{
-+ w->u.watcher->watcher(skb, in, out, w->data,
-+ w->watcher_size);
-+ // watchers don't give a verdict
-+ return 0;
-+}
-+
-+static inline int ebt_do_match (struct ebt_entry_match *m,
-+ const struct sk_buff *skb, const struct net_device *in,
-+ const struct net_device *out)
-+{
-+ return m->u.match->match(skb, in, out, m->data,
-+ m->match_size);
-+}
-+
-+static inline int ebt_dev_check(char *entry, const struct net_device *device)
-+{
-+ if (*entry == '\0')
-+ return 0;
-+ if (!device)
-+ return 1;
-+ return !!strcmp(entry, device->name);
-+}
-+
-+#define FWINV2(bool,invflg) ((bool) ^ !!(e->invflags & invflg))
-+// process standard matches
-+static inline int ebt_basic_match(struct ebt_entry *e, struct ethhdr *h,
-+ const struct net_device *in, const struct net_device *out)
-+{
-+ int verdict, i;
-+
-+ if (e->bitmask & EBT_802_3) {
-+ if (FWINV2(ntohs(h->h_proto) >= 1536, EBT_IPROTO))
-+ return 1;
-+ } else if (!(e->bitmask & EBT_NOPROTO) &&
-+ FWINV2(e->ethproto != h->h_proto, EBT_IPROTO))
-+ return 1;
-+
-+ if (FWINV2(ebt_dev_check(e->in, in), EBT_IIN))
-+ return 1;
-+ if (FWINV2(ebt_dev_check(e->out, out), EBT_IOUT))
-+ return 1;
-+ if ((!in || !in->br_port) ? 0 : FWINV2(ebt_dev_check(
-+ e->logical_in, &in->br_port->br->dev), EBT_ILOGICALIN))
-+ return 1;
-+ if ((!out || !out->br_port) ? 0 : FWINV2(ebt_dev_check(
-+ e->logical_out, &out->br_port->br->dev), EBT_ILOGICALOUT))
-+ return 1;
-+
-+ if (e->bitmask & EBT_SOURCEMAC) {
-+ verdict = 0;
-+ for (i = 0; i < 6; i++)
-+ verdict |= (h->h_source[i] ^ e->sourcemac[i]) &
-+ e->sourcemsk[i];
-+ if (FWINV2(verdict != 0, EBT_ISOURCE) )
-+ return 1;
-+ }
-+ if (e->bitmask & EBT_DESTMAC) {
-+ verdict = 0;
-+ for (i = 0; i < 6; i++)
-+ verdict |= (h->h_dest[i] ^ e->destmac[i]) &
-+ e->destmsk[i];
-+ if (FWINV2(verdict != 0, EBT_IDEST) )
-+ return 1;
-+ }
-+ return 0;
-+}
-+
-+// Do some firewalling
-+unsigned int ebt_do_table (unsigned int hook, struct sk_buff **pskb,
-+ const struct net_device *in, const struct net_device *out,
-+ struct ebt_table *table)
-+{
-+ int i, nentries;
-+ struct ebt_entry *point;
-+ struct ebt_counter *counter_base, *cb_base;
-+ struct ebt_entry_target *t;
-+ int verdict, sp = 0;
-+ struct ebt_chainstack *cs;
-+ struct ebt_entries *chaininfo;
-+ char *base;
-+ struct ebt_table_info *private = table->private;
-+
-+ read_lock_bh(&table->lock);
-+ cb_base = COUNTER_BASE(private->counters, private->nentries,
-+ cpu_number_map(smp_processor_id()));
-+ if (private->chainstack)
-+ cs = private->chainstack[cpu_number_map(smp_processor_id())];
-+ else
-+ cs = NULL;
-+ chaininfo = private->hook_entry[hook];
-+ nentries = private->hook_entry[hook]->nentries;
-+ point = (struct ebt_entry *)(private->hook_entry[hook]->data);
-+ counter_base = cb_base + private->hook_entry[hook]->counter_offset;
-+ // base for chain jumps
-+ base = private->entries;
-+ i = 0;
-+ while (i < nentries) {
-+ if (ebt_basic_match(point, (**pskb).mac.ethernet, in, out))
-+ goto letscontinue;
-+
-+ if (EBT_MATCH_ITERATE(point, ebt_do_match, *pskb, in, out) != 0)
-+ goto letscontinue;
-+
-+ // increase counter
-+ (*(counter_base + i)).pcnt++;
-+ (*(counter_base + i)).bcnt+=(**pskb).len;
-+
-+ // these should only watch: not modify, nor tell us
-+ // what to do with the packet
-+ EBT_WATCHER_ITERATE(point, ebt_do_watcher, *pskb, in,
-+ out);
-+
-+ t = (struct ebt_entry_target *)
-+ (((char *)point) + point->target_offset);
-+ // standard target
-+ if (!t->u.target->target)
-+ verdict = ((struct ebt_standard_target *)t)->verdict;
-+ else
-+ verdict = t->u.target->target(pskb, hook,
-+ in, out, t->data, t->target_size);
-+ if (verdict == EBT_ACCEPT) {
-+ read_unlock_bh(&table->lock);
-+ return NF_ACCEPT;
-+ }
-+ if (verdict == EBT_DROP) {
-+ read_unlock_bh(&table->lock);
-+ return NF_DROP;
-+ }
-+ if (verdict == EBT_RETURN) {
-+letsreturn:
-+#ifdef CONFIG_NETFILTER_DEBUG
-+ if (sp == 0) {
-+ BUGPRINT("RETURN on base chain");
-+ // act like this is EBT_CONTINUE
-+ goto letscontinue;
-+ }
-+#endif
-+ sp--;
-+ // put all the local variables right
-+ i = cs[sp].n;
-+ chaininfo = cs[sp].chaininfo;
-+ nentries = chaininfo->nentries;
-+ point = cs[sp].e;
-+ counter_base = cb_base +
-+ chaininfo->counter_offset;
-+ continue;
-+ }
-+ if (verdict == EBT_CONTINUE)
-+ goto letscontinue;
-+#ifdef CONFIG_NETFILTER_DEBUG
-+ if (verdict < 0) {
-+ BUGPRINT("bogus standard verdict\n");
-+ read_unlock_bh(&table->lock);
-+ return NF_DROP;
-+ }
-+#endif
-+ // jump to a udc
-+ cs[sp].n = i + 1;
-+ cs[sp].chaininfo = chaininfo;
-+ cs[sp].e = (struct ebt_entry *)
-+ (((char *)point) + point->next_offset);
-+ i = 0;
-+ chaininfo = (struct ebt_entries *) (base + verdict);
-+#ifdef CONFIG_NETFILTER_DEBUG
-+ if (chaininfo->distinguisher) {
-+ BUGPRINT("jump to non-chain\n");
-+ read_unlock_bh(&table->lock);
-+ return NF_DROP;
-+ }
-+#endif
-+ nentries = chaininfo->nentries;
-+ point = (struct ebt_entry *)chaininfo->data;
-+ counter_base = cb_base + chaininfo->counter_offset;
-+ sp++;
-+ continue;
-+letscontinue:
-+ point = (struct ebt_entry *)
-+ (((char *)point) + point->next_offset);
-+ i++;
-+ }
-+
-+ // I actually like this :)
-+ if (chaininfo->policy == EBT_RETURN)
-+ goto letsreturn;
-+ if (chaininfo->policy == EBT_ACCEPT) {
-+ read_unlock_bh(&table->lock);
-+ return NF_ACCEPT;
-+ }
-+ read_unlock_bh(&table->lock);
-+ return NF_DROP;
-+}
-+
-+// If it succeeds, returns element and locks mutex
-+static inline void *
-+find_inlist_lock_noload(struct list_head *head, const char *name, int *error,
-+ struct semaphore *mutex)
-+{
-+ void *ret;
-+
-+ *error = down_interruptible(mutex);
-+ if (*error != 0)
-+ return NULL;
-+
-+ ret = list_named_find(head, name);
-+ if (!ret) {
-+ *error = -ENOENT;
-+ up(mutex);
-+ }
-+ return ret;
-+}
-+
-+#ifndef CONFIG_KMOD
-+#define find_inlist_lock(h,n,p,e,m) find_inlist_lock_noload((h),(n),(e),(m))
-+#else
-+static void *
-+find_inlist_lock(struct list_head *head, const char *name, const char *prefix,
-+ int *error, struct semaphore *mutex)
-+{
-+ void *ret;
-+
-+ ret = find_inlist_lock_noload(head, name, error, mutex);
-+ if (!ret) {
-+ char modulename[EBT_FUNCTION_MAXNAMELEN + strlen(prefix) + 1];
-+ strcpy(modulename, prefix);
-+ strcat(modulename, name);
-+ request_module(modulename);
-+ ret = find_inlist_lock_noload(head, name, error, mutex);
-+ }
-+ return ret;
-+}
-+#endif
-+
-+static inline struct ebt_table *
-+find_table_lock(const char *name, int *error, struct semaphore *mutex)
-+{
-+ return find_inlist_lock(&ebt_tables, name, "ebtable_", error, mutex);
-+}
-+
-+static inline struct ebt_match *
-+find_match_lock(const char *name, int *error, struct semaphore *mutex)
-+{
-+ return find_inlist_lock(&ebt_matches, name, "ebt_", error, mutex);
-+}
-+
-+static inline struct ebt_watcher *
-+find_watcher_lock(const char *name, int *error, struct semaphore *mutex)
-+{
-+ return find_inlist_lock(&ebt_watchers, name, "ebt_", error, mutex);
-+}
-+
-+static inline struct ebt_target *
-+find_target_lock(const char *name, int *error, struct semaphore *mutex)
-+{
-+ return find_inlist_lock(&ebt_targets, name, "ebt_", error, mutex);
-+}
-+
-+static inline int
-+ebt_check_match(struct ebt_entry_match *m, struct ebt_entry *e,
-+ const char *name, unsigned int hookmask, unsigned int *cnt)
-+{
-+ struct ebt_match *match;
-+ int ret;
-+
-+ if (((char *)m) + m->match_size + sizeof(struct ebt_entry_match) >
-+ ((char *)e) + e->watchers_offset)
-+ return -EINVAL;
-+ match = find_match_lock(m->u.name, &ret, &ebt_mutex);
-+ if (!match)
-+ return ret;
-+ m->u.match = match;
-+ if (match->me)
-+ __MOD_INC_USE_COUNT(match->me);
-+ up(&ebt_mutex);
-+ if (match->check &&
-+ match->check(name, hookmask, e, m->data, m->match_size) != 0) {
-+ BUGPRINT("match->check failed\n");
-+ if (match->me)
-+ __MOD_DEC_USE_COUNT(match->me);
-+ return -EINVAL;
-+ }
-+ (*cnt)++;
-+ return 0;
-+}
-+
-+static inline int
-+ebt_check_watcher(struct ebt_entry_watcher *w, struct ebt_entry *e,
-+ const char *name, unsigned int hookmask, unsigned int *cnt)
-+{
-+ struct ebt_watcher *watcher;
-+ int ret;
-+
-+ if (((char *)w) + w->watcher_size + sizeof(struct ebt_entry_watcher) >
-+ ((char *)e) + e->target_offset)
-+ return -EINVAL;
-+ watcher = find_watcher_lock(w->u.name, &ret, &ebt_mutex);
-+ if (!watcher)
-+ return ret;
-+ w->u.watcher = watcher;
-+ if (watcher->me)
-+ __MOD_INC_USE_COUNT(watcher->me);
-+ up(&ebt_mutex);
-+ if (watcher->check &&
-+ watcher->check(name, hookmask, e, w->data, w->watcher_size) != 0) {
-+ BUGPRINT("watcher->check failed\n");
-+ if (watcher->me)
-+ __MOD_DEC_USE_COUNT(watcher->me);
-+ return -EINVAL;
-+ }
-+ (*cnt)++;
-+ return 0;
-+}
-+
-+// this one is very careful, as it is the first function
-+// to parse the userspace data
-+static inline int
-+ebt_check_entry_size_and_hooks(struct ebt_entry *e,
-+ struct ebt_table_info *newinfo, char *base, char *limit,
-+ struct ebt_entries **hook_entries, unsigned int *n, unsigned int *cnt,
-+ unsigned int *totalcnt, unsigned int *udc_cnt, unsigned int valid_hooks)
-+{
-+ int i;
-+
-+ for (i = 0; i < NF_BR_NUMHOOKS; i++) {
-+ if ((valid_hooks & (1 << i)) == 0)
-+ continue;
-+ if ( (char *)hook_entries[i] - base ==
-+ (char *)e - newinfo->entries)
-+ break;
-+ }
-+ // beginning of a new chain
-+ // if i == NF_BR_NUMHOOKS it must be a user defined chain
-+ if (i != NF_BR_NUMHOOKS || !(e->bitmask & EBT_ENTRY_OR_ENTRIES)) {
-+ if ((e->bitmask & EBT_ENTRY_OR_ENTRIES) != 0) {
-+ // we make userspace set this right,
-+ // so there is no misunderstanding
-+ BUGPRINT("EBT_ENTRY_OR_ENTRIES shouldn't be set "
-+ "in distinguisher\n");
-+ return -EINVAL;
-+ }
-+ // this checks if the previous chain has as many entries
-+ // as it said it has
-+ if (*n != *cnt) {
-+ BUGPRINT("nentries does not equal the nr of entries "
-+ "in the chain\n");
-+ return -EINVAL;
-+ }
-+ // before we look at the struct, be sure it is not too big
-+ if ((char *)hook_entries[i] + sizeof(struct ebt_entries)
-+ > limit) {
-+ BUGPRINT("entries_size too small\n");
-+ return -EINVAL;
-+ }
-+ if (((struct ebt_entries *)e)->policy != EBT_DROP &&
-+ ((struct ebt_entries *)e)->policy != EBT_ACCEPT) {
-+ // only RETURN from udc
-+ if (i != NF_BR_NUMHOOKS ||
-+ ((struct ebt_entries *)e)->policy != EBT_RETURN) {
-+ BUGPRINT("bad policy\n");
-+ return -EINVAL;
-+ }
-+ }
-+ if (i == NF_BR_NUMHOOKS) // it's a user defined chain
-+ (*udc_cnt)++;
-+ else
-+ newinfo->hook_entry[i] = (struct ebt_entries *)e;
-+ if (((struct ebt_entries *)e)->counter_offset != *totalcnt) {
-+ BUGPRINT("counter_offset != totalcnt");
-+ return -EINVAL;
-+ }
-+ *n = ((struct ebt_entries *)e)->nentries;
-+ *cnt = 0;
-+ return 0;
-+ }
-+ // a plain old entry, heh
-+ if (sizeof(struct ebt_entry) > e->watchers_offset ||
-+ e->watchers_offset > e->target_offset ||
-+ e->target_offset >= e->next_offset) {
-+ BUGPRINT("entry offsets not in right order\n");
-+ return -EINVAL;
-+ }
-+ // this is not checked anywhere else
-+ if (e->next_offset - e->target_offset < sizeof(struct ebt_entry_target)) {
-+ BUGPRINT("target size too small\n");
-+ return -EINVAL;
-+ }
-+
-+ (*cnt)++;
-+ (*totalcnt)++;
-+ return 0;
-+}
-+
-+struct ebt_cl_stack
-+{
-+ struct ebt_chainstack cs;
-+ int from;
-+ unsigned int hookmask;
-+};
-+
-+// we need these positions to check that the jumps to a different part of the
-+// entries is a jump to the beginning of a new chain.
-+static inline int
-+ebt_get_udc_positions(struct ebt_entry *e, struct ebt_table_info *newinfo,
-+ struct ebt_entries **hook_entries, unsigned int *n, unsigned int valid_hooks,
-+ struct ebt_cl_stack *udc)
-+{
-+ int i;
-+
-+ // we're only interested in chain starts
-+ if (e->bitmask & EBT_ENTRY_OR_ENTRIES)
-+ return 0;
-+ for (i = 0; i < NF_BR_NUMHOOKS; i++) {
-+ if ((valid_hooks & (1 << i)) == 0)
-+ continue;
-+ if (newinfo->hook_entry[i] == (struct ebt_entries *)e)
-+ break;
-+ }
-+ // only care about udc
-+ if (i != NF_BR_NUMHOOKS)
-+ return 0;
-+
-+ udc[*n].cs.chaininfo = (struct ebt_entries *)e;
-+ // these initialisations are depended on later in check_chainloops()
-+ udc[*n].cs.n = 0;
-+ udc[*n].hookmask = 0;
-+
-+ (*n)++;
-+ return 0;
-+}
-+
-+static inline int
-+ebt_cleanup_match(struct ebt_entry_match *m, unsigned int *i)
-+{
-+ if (i && (*i)-- == 0)
-+ return 1;
-+ if (m->u.match->destroy)
-+ m->u.match->destroy(m->data, m->match_size);
-+ if (m->u.match->me)
-+ __MOD_DEC_USE_COUNT(m->u.match->me);
-+
-+ return 0;
-+}
-+
-+static inline int
-+ebt_cleanup_watcher(struct ebt_entry_watcher *w, unsigned int *i)
-+{
-+ if (i && (*i)-- == 0)
-+ return 1;
-+ if (w->u.watcher->destroy)
-+ w->u.watcher->destroy(w->data, w->watcher_size);
-+ if (w->u.watcher->me)
-+ __MOD_DEC_USE_COUNT(w->u.watcher->me);
-+
-+ return 0;
-+}
-+
-+static inline int
-+ebt_cleanup_entry(struct ebt_entry *e, unsigned int *cnt)
-+{
-+ struct ebt_entry_target *t;
-+
-+ if ((e->bitmask & EBT_ENTRY_OR_ENTRIES) == 0)
-+ return 0;
-+ // we're done
-+ if (cnt && (*cnt)-- == 0)
-+ return 1;
-+ EBT_WATCHER_ITERATE(e, ebt_cleanup_watcher, NULL);
-+ EBT_MATCH_ITERATE(e, ebt_cleanup_match, NULL);
-+ t = (struct ebt_entry_target *)(((char *)e) + e->target_offset);
-+ if (t->u.target->destroy)
-+ t->u.target->destroy(t->data, t->target_size);
-+ if (t->u.target->me)
-+ __MOD_DEC_USE_COUNT(t->u.target->me);
-+
-+ return 0;
-+}
-+
-+static inline int
-+ebt_check_entry(struct ebt_entry *e, struct ebt_table_info *newinfo,
-+ const char *name, unsigned int *cnt, unsigned int valid_hooks,
-+ struct ebt_cl_stack *cl_s, unsigned int udc_cnt)
-+{
-+ struct ebt_entry_target *t;
-+ struct ebt_target *target;
-+ unsigned int i, j, hook = 0, hookmask = 0;
-+ int ret;
-+
-+ // Don't mess with the struct ebt_entries
-+ if ((e->bitmask & EBT_ENTRY_OR_ENTRIES) == 0)
-+ return 0;
-+
-+ if (e->bitmask & ~EBT_F_MASK) {
-+ BUGPRINT("Unknown flag for bitmask\n");
-+ return -EINVAL;
-+ }
-+ if (e->invflags & ~EBT_INV_MASK) {
-+ BUGPRINT("Unknown flag for inv bitmask\n");
-+ return -EINVAL;
-+ }
-+ if ( (e->bitmask & EBT_NOPROTO) && (e->bitmask & EBT_802_3) ) {
-+ BUGPRINT("NOPROTO & 802_3 not allowed\n");
-+ return -EINVAL;
-+ }
-+ // what hook do we belong to?
-+ for (i = 0; i < NF_BR_NUMHOOKS; i++) {
-+ if ((valid_hooks & (1 << i)) == 0)
-+ continue;
-+ if ((char *)newinfo->hook_entry[i] < (char *)e)
-+ hook = i;
-+ else
-+ break;
-+ }
-+ // (1 << NF_BR_NUMHOOKS) tells the check functions the rule is on
-+ // a base chain
-+ if (i < NF_BR_NUMHOOKS)
-+ hookmask = (1 << hook) | (1 << NF_BR_NUMHOOKS);
-+ else {
-+ for (i = 0; i < udc_cnt; i++)
-+ if ((char *)(cl_s[i].cs.chaininfo) > (char *)e)
-+ break;
-+ if (i == 0)
-+ hookmask = (1 << hook) | (1 << NF_BR_NUMHOOKS);
-+ else
-+ hookmask = cl_s[i - 1].hookmask;
-+ }
-+ i = 0;
-+ ret = EBT_MATCH_ITERATE(e, ebt_check_match, e, name, hookmask, &i);
-+ if (ret != 0)
-+ goto cleanup_matches;
-+ j = 0;
-+ ret = EBT_WATCHER_ITERATE(e, ebt_check_watcher, e, name, hookmask, &j);
-+ if (ret != 0)
-+ goto cleanup_watchers;
-+ t = (struct ebt_entry_target *)(((char *)e) + e->target_offset);
-+ target = find_target_lock(t->u.name, &ret, &ebt_mutex);
-+ if (!target)
-+ goto cleanup_watchers;
-+ if (target->me)
-+ __MOD_INC_USE_COUNT(target->me);
-+ up(&ebt_mutex);
-+
-+ t->u.target = target;
-+ if (t->u.target == &ebt_standard_target) {
-+ if (e->target_offset + sizeof(struct ebt_standard_target) >
-+ e->next_offset) {
-+ BUGPRINT("Standard target size too big\n");
-+ ret = -EFAULT;
-+ goto cleanup_watchers;
-+ }
-+ if (((struct ebt_standard_target *)t)->verdict <
-+ -NUM_STANDARD_TARGETS) {
-+ BUGPRINT("Invalid standard target\n");
-+ ret = -EFAULT;
-+ goto cleanup_watchers;
-+ }
-+ } else if ((e->target_offset + t->target_size +
-+ sizeof(struct ebt_entry_target) > e->next_offset) ||
-+ (t->u.target->check &&
-+ t->u.target->check(name, hookmask, e, t->data, t->target_size) != 0)){
-+ if (t->u.target->me)
-+ __MOD_DEC_USE_COUNT(t->u.target->me);
-+ ret = -EFAULT;
-+ goto cleanup_watchers;
-+ }
-+ (*cnt)++;
-+ return 0;
-+cleanup_watchers:
-+ EBT_WATCHER_ITERATE(e, ebt_cleanup_watcher, &j);
-+cleanup_matches:
-+ EBT_MATCH_ITERATE(e, ebt_cleanup_match, &i);
-+ return ret;
-+}
-+
-+// checks for loops and sets the hook mask for udc
-+// the hook mask for udc tells us from which base chains the udc can be
-+// accessed. This mask is a parameter to the check() functions of the extensions
-+static int check_chainloops(struct ebt_entries *chain,
-+ struct ebt_cl_stack *cl_s, unsigned int udc_cnt,
-+ unsigned int hooknr, char *base)
-+{
-+ int i, chain_nr = -1, pos = 0, nentries = chain->nentries, verdict;
-+ struct ebt_entry *e = (struct ebt_entry *)chain->data;
-+ struct ebt_entry_target *t;
-+
-+ while (pos < nentries || chain_nr != -1) {
-+ // end of udc, go back one 'recursion' step
-+ if (pos == nentries) {
-+ // put back values of the time when this chain was called
-+ e = cl_s[chain_nr].cs.e;
-+ if (cl_s[chain_nr].from != -1)
-+ nentries =
-+ cl_s[cl_s[chain_nr].from].cs.chaininfo->nentries;
-+ else
-+ nentries = chain->nentries;
-+ pos = cl_s[chain_nr].cs.n;
-+ // make sure we won't see a loop that isn't one
-+ cl_s[chain_nr].cs.n = 0;
-+ chain_nr = cl_s[chain_nr].from;
-+ if (pos == nentries)
-+ continue;
-+ }
-+ t = (struct ebt_entry_target *)
-+ (((char *)e) + e->target_offset);
-+ if (strcmp(t->u.name, EBT_STANDARD_TARGET))
-+ goto letscontinue;
-+ if (e->target_offset + sizeof(struct ebt_standard_target) >
-+ e->next_offset) {
-+ BUGPRINT("Standard target size too big\n");
-+ return -1;
-+ }
-+ verdict = ((struct ebt_standard_target *)t)->verdict;
-+ if (verdict >= 0) { // jump to another chain
-+ struct ebt_entries *hlp2 =
-+ (struct ebt_entries *)(base + verdict);
-+ for (i = 0; i < udc_cnt; i++)
-+ if (hlp2 == cl_s[i].cs.chaininfo)
-+ break;
-+ // bad destination or loop
-+ if (i == udc_cnt) {
-+ BUGPRINT("bad destination\n");
-+ return -1;
-+ }
-+ if (cl_s[i].cs.n) {
-+ BUGPRINT("loop\n");
-+ return -1;
-+ }
-+ // this can't be 0, so the above test is correct
-+ cl_s[i].cs.n = pos + 1;
-+ pos = 0;
-+ cl_s[i].cs.e = ((void *)e + e->next_offset);
-+ e = (struct ebt_entry *)(hlp2->data);
-+ nentries = hlp2->nentries;
-+ cl_s[i].from = chain_nr;
-+ chain_nr = i;
-+ // this udc is accessible from the base chain for hooknr
-+ cl_s[i].hookmask |= (1 << hooknr);
-+ continue;
-+ }
-+letscontinue:
-+ e = (void *)e + e->next_offset;
-+ pos++;
-+ }
-+ return 0;
-+}
-+
-+// do the parsing of the table/chains/entries/matches/watchers/targets, heh
-+static int translate_table(struct ebt_replace *repl,
-+ struct ebt_table_info *newinfo)
-+{
-+ unsigned int i, j, k, udc_cnt;
-+ int ret;
-+ struct ebt_cl_stack *cl_s = NULL; // used in the checking for chain loops
-+
-+ i = 0;
-+ while (i < NF_BR_NUMHOOKS && !(repl->valid_hooks & (1 << i)))
-+ i++;
-+ if (i == NF_BR_NUMHOOKS) {
-+ BUGPRINT("No valid hooks specified\n");
-+ return -EINVAL;
-+ }
-+ if (repl->hook_entry[i] != (struct ebt_entries *)repl->entries) {
-+ BUGPRINT("Chains don't start at beginning\n");
-+ return -EINVAL;
-+ }
-+ // make sure chains are ordered after each other in same order
-+ // as their corresponding hooks
-+ for (j = i + 1; j < NF_BR_NUMHOOKS; j++) {
-+ if (!(repl->valid_hooks & (1 << j)))
-+ continue;
-+ if ( repl->hook_entry[j] <= repl->hook_entry[i] ) {
-+ BUGPRINT("Hook order must be followed\n");
-+ return -EINVAL;
-+ }
-+ i = j;
-+ }
-+
-+ for (i = 0; i < NF_BR_NUMHOOKS; i++)
-+ newinfo->hook_entry[i] = NULL;
-+
-+ newinfo->entries_size = repl->entries_size;
-+ newinfo->nentries = repl->nentries;
-+
-+ // do some early checkings and initialize some things
-+ i = 0; // holds the expected nr. of entries for the chain
-+ j = 0; // holds the up to now counted entries for the chain
-+ k = 0; // holds the total nr. of entries, should equal
-+ // newinfo->nentries afterwards
-+ udc_cnt = 0; // will hold the nr. of user defined chains (udc)
-+ ret = EBT_ENTRY_ITERATE(newinfo->entries, newinfo->entries_size,
-+ ebt_check_entry_size_and_hooks, newinfo, repl->entries,
-+ repl->entries + repl->entries_size, repl->hook_entry, &i, &j, &k,
-+ &udc_cnt, repl->valid_hooks);
-+
-+ if (ret != 0)
-+ return ret;
-+
-+ if (i != j) {
-+ BUGPRINT("nentries does not equal the nr of entries in the "
-+ "(last) chain\n");
-+ return -EINVAL;
-+ }
-+ if (k != newinfo->nentries) {
-+ BUGPRINT("Total nentries is wrong\n");
-+ return -EINVAL;
-+ }
-+
-+ // check if all valid hooks have a chain
-+ for (i = 0; i < NF_BR_NUMHOOKS; i++) {
-+ if (newinfo->hook_entry[i] == NULL &&
-+ (repl->valid_hooks & (1 << i))) {
-+ BUGPRINT("Valid hook without chain\n");
-+ return -EINVAL;
-+ }
-+ }
-+
-+ // Get the location of the udc, put them in an array
-+ // While we're at it, allocate the chainstack
-+ if (udc_cnt) {
-+ // this will get free'd in do_replace()/ebt_register_table()
-+ // if an error occurs
-+ newinfo->chainstack = (struct ebt_chainstack **)
-+ vmalloc(smp_num_cpus * sizeof(struct ebt_chainstack));
-+ if (!newinfo->chainstack)
-+ return -ENOMEM;
-+ for (i = 0; i < smp_num_cpus; i++) {
-+ newinfo->chainstack[i] =
-+ vmalloc(udc_cnt * sizeof(struct ebt_chainstack));
-+ if (!newinfo->chainstack[i]) {
-+ while (i)
-+ vfree(newinfo->chainstack[--i]);
-+ vfree(newinfo->chainstack);
-+ newinfo->chainstack = NULL;
-+ return -ENOMEM;
-+ }
-+ }
-+
-+ cl_s = (struct ebt_cl_stack *)
-+ vmalloc(udc_cnt * sizeof(struct ebt_cl_stack));
-+ if (!cl_s)
-+ return -ENOMEM;
-+ i = 0; // the i'th udc
-+ EBT_ENTRY_ITERATE(newinfo->entries, newinfo->entries_size,
-+ ebt_get_udc_positions, newinfo, repl->hook_entry, &i,
-+ repl->valid_hooks, cl_s);
-+ // sanity check
-+ if (i != udc_cnt) {
-+ BUGPRINT("i != udc_cnt\n");
-+ vfree(cl_s);
-+ return -EFAULT;
-+ }
-+ }
-+
-+ // Check for loops
-+ for (i = 0; i < NF_BR_NUMHOOKS; i++)
-+ if (repl->valid_hooks & (1 << i))
-+ if (check_chainloops(newinfo->hook_entry[i],
-+ cl_s, udc_cnt, i, newinfo->entries)) {
-+ if (cl_s)
-+ vfree(cl_s);
-+ return -EINVAL;
-+ }
-+
-+ // we now know the following (along with E=mc²):
-+ // - the nr of entries in each chain is right
-+ // - the size of the allocated space is right
-+ // - all valid hooks have a corresponding chain
-+ // - there are no loops
-+ // - wrong data can still be on the level of a single entry
-+ // - could be there are jumps to places that are not the
-+ // beginning of a chain. This can only occur in chains that
-+ // are not accessible from any base chains, so we don't care.
-+
-+ // used to know what we need to clean up if something goes wrong
-+ i = 0;
-+ ret = EBT_ENTRY_ITERATE(newinfo->entries, newinfo->entries_size,
-+ ebt_check_entry, newinfo, repl->name, &i, repl->valid_hooks,
-+ cl_s, udc_cnt);
-+ if (ret != 0) {
-+ EBT_ENTRY_ITERATE(newinfo->entries, newinfo->entries_size,
-+ ebt_cleanup_entry, &i);
-+ }
-+ if (cl_s)
-+ vfree(cl_s);
-+ return ret;
-+}
-+
-+// called under write_lock
-+static void get_counters(struct ebt_counter *oldcounters,
-+ struct ebt_counter *counters, unsigned int nentries)
-+{
-+ int i, cpu;
-+ struct ebt_counter *counter_base;
-+
-+ // counters of cpu 0
-+ memcpy(counters, oldcounters,
-+ sizeof(struct ebt_counter) * nentries);
-+ // add other counters to those of cpu 0
-+ for (cpu = 1; cpu < smp_num_cpus; cpu++) {
-+ counter_base = COUNTER_BASE(oldcounters, nentries, cpu);
-+ for (i = 0; i < nentries; i++) {
-+ counters[i].pcnt += counter_base[i].pcnt;
-+ counters[i].bcnt += counter_base[i].bcnt;
-+ }
-+ }
-+}
-+
-+// replace the table
-+static int do_replace(void *user, unsigned int len)
-+{
-+ int ret, i, countersize;
-+ struct ebt_table_info *newinfo;
-+ struct ebt_replace tmp;
-+ struct ebt_table *t;
-+ struct ebt_counter *counterstmp = NULL;
-+ // used to be able to unlock earlier
-+ struct ebt_table_info *table;
-+
-+ if (copy_from_user(&tmp, user, sizeof(tmp)) != 0)
-+ return -EFAULT;
-+
-+ if (len != sizeof(tmp) + tmp.entries_size) {
-+ BUGPRINT("Wrong len argument\n");
-+ return -EINVAL;
-+ }
-+
-+ if (tmp.entries_size == 0) {
-+ BUGPRINT("Entries_size never zero\n");
-+ return -EINVAL;
-+ }
-+ countersize = COUNTER_OFFSET(tmp.nentries) * smp_num_cpus;
-+ newinfo = (struct ebt_table_info *)
-+ vmalloc(sizeof(struct ebt_table_info) + countersize);
-+ if (!newinfo)
-+ return -ENOMEM;
-+
-+ if (countersize)
-+ memset(newinfo->counters, 0, countersize);
-+
-+ newinfo->entries = (char *)vmalloc(tmp.entries_size);
-+ if (!newinfo->entries) {
-+ ret = -ENOMEM;
-+ goto free_newinfo;
-+ }
-+ if (copy_from_user(
-+ newinfo->entries, tmp.entries, tmp.entries_size) != 0) {
-+ BUGPRINT("Couldn't copy entries from userspace\n");
-+ ret = -EFAULT;
-+ goto free_entries;
-+ }
-+
-+ // the user wants counters back
-+ // the check on the size is done later, when we have the lock
-+ if (tmp.num_counters) {
-+ counterstmp = (struct ebt_counter *)
-+ vmalloc(tmp.num_counters * sizeof(struct ebt_counter));
-+ if (!counterstmp) {
-+ ret = -ENOMEM;
-+ goto free_entries;
-+ }
-+ }
-+ else
-+ counterstmp = NULL;
-+
-+ // this can get initialized by translate_table()
-+ newinfo->chainstack = NULL;
-+ ret = translate_table(&tmp, newinfo);
-+
-+ if (ret != 0)
-+ goto free_counterstmp;
-+
-+ t = find_table_lock(tmp.name, &ret, &ebt_mutex);
-+ if (!t)
-+ goto free_iterate;
-+
-+ // the table doesn't like it
-+ if (t->check && (ret = t->check(newinfo, tmp.valid_hooks)))
-+ goto free_unlock;
-+
-+ if (tmp.num_counters && tmp.num_counters != t->private->nentries) {
-+ BUGPRINT("Wrong nr. of counters requested\n");
-+ ret = -EINVAL;
-+ goto free_unlock;
-+ }
-+
-+ // we have the mutex lock, so no danger in reading this pointer
-+ table = t->private;
-+ // we need an atomic snapshot of the counters
-+ write_lock_bh(&t->lock);
-+ if (tmp.num_counters)
-+ get_counters(t->private->counters, counterstmp,
-+ t->private->nentries);
-+
-+ t->private = newinfo;
-+ write_unlock_bh(&t->lock);
-+ up(&ebt_mutex);
-+ // So, a user can change the chains while having messed up her counter
-+ // allocation. Only reason why this is done is because this way the lock
-+ // is held only once, while this doesn't bring the kernel into a
-+ // dangerous state.
-+ if (tmp.num_counters &&
-+ copy_to_user(tmp.counters, counterstmp,
-+ tmp.num_counters * sizeof(struct ebt_counter))) {
-+ BUGPRINT("Couldn't copy counters to userspace\n");
-+ ret = -EFAULT;
-+ }
-+ else
-+ ret = 0;
-+
-+ // decrease module count and free resources
-+ EBT_ENTRY_ITERATE(table->entries, table->entries_size,
-+ ebt_cleanup_entry, NULL);
-+
-+ vfree(table->entries);
-+ if (table->chainstack) {
-+ for (i = 0; i < smp_num_cpus; i++)
-+ vfree(table->chainstack[i]);
-+ vfree(table->chainstack);
-+ }
-+ vfree(table);
-+
-+ if (counterstmp)
-+ vfree(counterstmp);
-+ return ret;
-+
-+free_unlock:
-+ up(&ebt_mutex);
-+free_iterate:
-+ EBT_ENTRY_ITERATE(newinfo->entries, newinfo->entries_size,
-+ ebt_cleanup_entry, NULL);
-+free_counterstmp:
-+ if (counterstmp)
-+ vfree(counterstmp);
-+ // can be initialized in translate_table()
-+ if (newinfo->chainstack) {
-+ for (i = 0; i < smp_num_cpus; i++)
-+ vfree(newinfo->chainstack[i]);
-+ vfree(newinfo->chainstack);
-+ }
-+free_entries:
-+ if (newinfo->entries)
-+ vfree(newinfo->entries);
-+free_newinfo:
-+ if (newinfo)
-+ vfree(newinfo);
-+ return ret;
-+}
-+
-+int ebt_register_target(struct ebt_target *target)
-+{
-+ int ret;
-+
-+ ret = down_interruptible(&ebt_mutex);
-+ if (ret != 0)
-+ return ret;
-+ if (!list_named_insert(&ebt_targets, target)) {
-+ up(&ebt_mutex);
-+ return -EEXIST;
-+ }
-+ up(&ebt_mutex);
-+ MOD_INC_USE_COUNT;
-+
-+ return 0;
-+}
-+
-+void ebt_unregister_target(struct ebt_target *target)
-+{
-+ down(&ebt_mutex);
-+ LIST_DELETE(&ebt_targets, target);
-+ up(&ebt_mutex);
-+ MOD_DEC_USE_COUNT;
-+}
-+
-+int ebt_register_match(struct ebt_match *match)
-+{
-+ int ret;
-+
-+ ret = down_interruptible(&ebt_mutex);
-+ if (ret != 0)
-+ return ret;
-+ if (!list_named_insert(&ebt_matches, match)) {
-+ up(&ebt_mutex);
-+ return -EEXIST;
-+ }
-+ up(&ebt_mutex);
-+ MOD_INC_USE_COUNT;
-+
-+ return 0;
-+}
-+
-+void ebt_unregister_match(struct ebt_match *match)
-+{
-+ down(&ebt_mutex);
-+ LIST_DELETE(&ebt_matches, match);
-+ up(&ebt_mutex);
-+ MOD_DEC_USE_COUNT;
-+}
-+
-+int ebt_register_watcher(struct ebt_watcher *watcher)
-+{
-+ int ret;
-+
-+ ret = down_interruptible(&ebt_mutex);
-+ if (ret != 0)
-+ return ret;
-+ if (!list_named_insert(&ebt_watchers, watcher)) {
-+ up(&ebt_mutex);
-+ return -EEXIST;
-+ }
-+ up(&ebt_mutex);
-+ MOD_INC_USE_COUNT;
-+
-+ return 0;
-+}
-+
-+void ebt_unregister_watcher(struct ebt_watcher *watcher)
-+{
-+ down(&ebt_mutex);
-+ LIST_DELETE(&ebt_watchers, watcher);
-+ up(&ebt_mutex);
-+ MOD_DEC_USE_COUNT;
-+}
-+
-+int ebt_register_table(struct ebt_table *table)
-+{
-+ struct ebt_table_info *newinfo;
-+ int ret, i, countersize;
-+
-+ if (!table || !table->table ||!table->table->entries ||
-+ table->table->entries_size == 0 ||
-+ table->table->counters || table->private) {
-+ BUGPRINT("Bad table data for ebt_register_table!!!\n");
-+ return -EINVAL;
-+ }
-+
-+ countersize = COUNTER_OFFSET(table->table->nentries) * smp_num_cpus;
-+ newinfo = (struct ebt_table_info *)
-+ vmalloc(sizeof(struct ebt_table_info) + countersize);
-+ ret = -ENOMEM;
-+ if (!newinfo)
-+ return -ENOMEM;
-+
-+ newinfo->entries = (char *)vmalloc(table->table->entries_size);
-+ if (!(newinfo->entries))
-+ goto free_newinfo;
-+
-+ memcpy(newinfo->entries, table->table->entries,
-+ table->table->entries_size);
-+
-+ if (countersize)
-+ memset(newinfo->counters, 0, countersize);
-+
-+ // fill in newinfo and parse the entries
-+ newinfo->chainstack = NULL;
-+ ret = translate_table(table->table, newinfo);
-+ if (ret != 0) {
-+ BUGPRINT("Translate_table failed\n");
-+ goto free_chainstack;
-+ }
-+
-+ if (table->check && table->check(newinfo, table->valid_hooks)) {
-+ BUGPRINT("The table doesn't like its own initial data, lol\n");
-+ return -EINVAL;
-+ }
-+
-+ table->private = newinfo;
-+ table->lock = RW_LOCK_UNLOCKED;
-+ ret = down_interruptible(&ebt_mutex);
-+ if (ret != 0)
-+ goto free_chainstack;
-+
-+ if (list_named_find(&ebt_tables, table->name)) {
-+ ret = -EEXIST;
-+ BUGPRINT("Table name already exists\n");
-+ goto free_unlock;
-+ }
-+
-+ list_prepend(&ebt_tables, table);
-+ up(&ebt_mutex);
-+ MOD_INC_USE_COUNT;
-+ return 0;
-+free_unlock:
-+ up(&ebt_mutex);
-+free_chainstack:
-+ if (newinfo->chainstack) {
-+ for (i = 0; i < smp_num_cpus; i++)
-+ vfree(newinfo->chainstack[i]);
-+ vfree(newinfo->chainstack);
-+ }
-+ vfree(newinfo->entries);
-+free_newinfo:
-+ vfree(newinfo);
-+ return ret;
-+}
-+
-+void ebt_unregister_table(struct ebt_table *table)
-+{
-+ int i;
-+
-+ if (!table) {
-+ BUGPRINT("Request to unregister NULL table!!!\n");
-+ return;
-+ }
-+ down(&ebt_mutex);
-+ LIST_DELETE(&ebt_tables, table);
-+ up(&ebt_mutex);
-+ EBT_ENTRY_ITERATE(table->private->entries,
-+ table->private->entries_size, ebt_cleanup_entry, NULL);
-+ if (table->private->entries)
-+ vfree(table->private->entries);
-+ if (table->private->chainstack) {
-+ for (i = 0; i < smp_num_cpus; i++)
-+ vfree(table->private->chainstack[i]);
-+ vfree(table->private->chainstack);
-+ }
-+ vfree(table->private);
-+ MOD_DEC_USE_COUNT;
-+}
-+
-+// userspace just supplied us with counters
-+static int update_counters(void *user, unsigned int len)
-+{
-+ int i, ret;
-+ struct ebt_counter *tmp;
-+ struct ebt_replace hlp;
-+ struct ebt_table *t;
-+
-+ if (copy_from_user(&hlp, user, sizeof(hlp)))
-+ return -EFAULT;
-+
-+ if (len != sizeof(hlp) + hlp.num_counters * sizeof(struct ebt_counter))
-+ return -EINVAL;
-+ if (hlp.num_counters == 0)
-+ return -EINVAL;
-+
-+ if ( !(tmp = (struct ebt_counter *)
-+ vmalloc(hlp.num_counters * sizeof(struct ebt_counter))) ){
-+ MEMPRINT("Update_counters && nomemory\n");
-+ return -ENOMEM;
-+ }
-+
-+ t = find_table_lock(hlp.name, &ret, &ebt_mutex);
-+ if (!t)
-+ goto free_tmp;
-+
-+ if (hlp.num_counters != t->private->nentries) {
-+ BUGPRINT("Wrong nr of counters\n");
-+ ret = -EINVAL;
-+ goto unlock_mutex;
-+ }
-+
-+ if ( copy_from_user(tmp, hlp.counters,
-+ hlp.num_counters * sizeof(struct ebt_counter)) ) {
-+ BUGPRINT("Updata_counters && !cfu\n");
-+ ret = -EFAULT;
-+ goto unlock_mutex;
-+ }
-+
-+ // we want an atomic add of the counters
-+ write_lock_bh(&t->lock);
-+
-+ // we add to the counters of the first cpu
-+ for (i = 0; i < hlp.num_counters; i++) {
-+ t->private->counters[i].pcnt += tmp[i].pcnt;
-+ t->private->counters[i].bcnt += tmp[i].bcnt;
-+ }
-+
-+ write_unlock_bh(&t->lock);
-+ ret = 0;
-+unlock_mutex:
-+ up(&ebt_mutex);
-+free_tmp:
-+ vfree(tmp);
-+ return ret;
-+}
-+
-+static inline int ebt_make_matchname(struct ebt_entry_match *m,
-+ char *base, char *ubase)
-+{
-+ char *hlp = ubase - base + (char *)m;
-+ if (copy_to_user(hlp, m->u.match->name, EBT_FUNCTION_MAXNAMELEN))
-+ return -EFAULT;
-+ return 0;
-+}
-+
-+static inline int ebt_make_watchername(struct ebt_entry_watcher *w,
-+ char *base, char *ubase)
-+{
-+ char *hlp = ubase - base + (char *)w;
-+ if (copy_to_user(hlp , w->u.watcher->name, EBT_FUNCTION_MAXNAMELEN))
-+ return -EFAULT;
-+ return 0;
-+}
-+
-+static inline int ebt_make_names(struct ebt_entry *e, char *base, char *ubase)
-+{
-+ int ret;
-+ char *hlp;
-+ struct ebt_entry_target *t;
-+
-+ if ((e->bitmask & EBT_ENTRY_OR_ENTRIES) == 0)
-+ return 0;
-+
-+ hlp = ubase - base + (char *)e + e->target_offset;
-+ t = (struct ebt_entry_target *)(((char *)e) + e->target_offset);
-+
-+ ret = EBT_MATCH_ITERATE(e, ebt_make_matchname, base, ubase);
-+ if (ret != 0)
-+ return ret;
-+ ret = EBT_WATCHER_ITERATE(e, ebt_make_watchername, base, ubase);
-+ if (ret != 0)
-+ return ret;
-+ if (copy_to_user(hlp, t->u.target->name, EBT_FUNCTION_MAXNAMELEN))
-+ return -EFAULT;
-+ return 0;
-+}
-+
-+// called with ebt_mutex down
-+static int copy_everything_to_user(struct ebt_table *t, void *user,
-+ int *len, int cmd)
-+{
-+ struct ebt_replace tmp;
-+ struct ebt_counter *counterstmp, *oldcounters;
-+ unsigned int entries_size, nentries;
-+ char *entries;
-+
-+ if (cmd == EBT_SO_GET_ENTRIES) {
-+ entries_size = t->private->entries_size;
-+ nentries = t->private->nentries;
-+ entries = t->private->entries;
-+ oldcounters = t->private->counters;
-+ } else {
-+ entries_size = t->table->entries_size;
-+ nentries = t->table->nentries;
-+ entries = t->table->entries;
-+ oldcounters = t->table->counters;
-+ }
-+
-+ if (copy_from_user(&tmp, user, sizeof(tmp))) {
-+ BUGPRINT("Cfu didn't work\n");
-+ return -EFAULT;
-+ }
-+
-+ if (*len != sizeof(struct ebt_replace) + entries_size +
-+ (tmp.num_counters? nentries * sizeof(struct ebt_counter): 0)) {
-+ BUGPRINT("Wrong size\n");
-+ return -EINVAL;
-+ }
-+
-+ if (tmp.nentries != nentries) {
-+ BUGPRINT("Nentries wrong\n");
-+ return -EINVAL;
-+ }
-+
-+ if (tmp.entries_size != entries_size) {
-+ BUGPRINT("Wrong size\n");
-+ return -EINVAL;
-+ }
-+
-+ // userspace might not need the counters
-+ if (tmp.num_counters) {
-+ if (tmp.num_counters != nentries) {
-+ BUGPRINT("Num_counters wrong\n");
-+ return -EINVAL;
-+ }
-+ counterstmp = (struct ebt_counter *)
-+ vmalloc(nentries * sizeof(struct ebt_counter));
-+ if (!counterstmp) {
-+ MEMPRINT("Couldn't copy counters, out of memory\n");
-+ return -ENOMEM;
-+ }
-+ write_lock_bh(&t->lock);
-+ get_counters(oldcounters, counterstmp, nentries);
-+ write_unlock_bh(&t->lock);
-+
-+ if (copy_to_user(tmp.counters, counterstmp,
-+ nentries * sizeof(struct ebt_counter))) {
-+ BUGPRINT("Couldn't copy counters to userspace\n");
-+ vfree(counterstmp);
-+ return -EFAULT;
-+ }
-+ vfree(counterstmp);
-+ }
-+
-+ if (copy_to_user(tmp.entries, entries, entries_size)) {
-+ BUGPRINT("Couldn't copy entries to userspace\n");
-+ return -EFAULT;
-+ }
-+ // set the match/watcher/target names right
-+ return EBT_ENTRY_ITERATE(entries, entries_size,
-+ ebt_make_names, entries, tmp.entries);
-+}
-+
-+static int do_ebt_set_ctl(struct sock *sk,
-+ int cmd, void *user, unsigned int len)
-+{
-+ int ret;
-+
-+ switch(cmd) {
-+ case EBT_SO_SET_ENTRIES:
-+ ret = do_replace(user, len);
-+ break;
-+ case EBT_SO_SET_COUNTERS:
-+ ret = update_counters(user, len);
-+ break;
-+ default:
-+ ret = -EINVAL;
-+ }
-+ return ret;
-+}
-+
-+static int do_ebt_get_ctl(struct sock *sk, int cmd, void *user, int *len)
-+{
-+ int ret;
-+ struct ebt_replace tmp;
-+ struct ebt_table *t;
-+
-+ if (copy_from_user(&tmp, user, sizeof(tmp)))
-+ return -EFAULT;
-+
-+ t = find_table_lock(tmp.name, &ret, &ebt_mutex);
-+ if (!t)
-+ return ret;
-+
-+ switch(cmd) {
-+ case EBT_SO_GET_INFO:
-+ case EBT_SO_GET_INIT_INFO:
-+ if (*len != sizeof(struct ebt_replace)){
-+ ret = -EINVAL;
-+ up(&ebt_mutex);
-+ break;
-+ }
-+ if (cmd == EBT_SO_GET_INFO) {
-+ tmp.nentries = t->private->nentries;
-+ tmp.entries_size = t->private->entries_size;
-+ tmp.valid_hooks = t->valid_hooks;
-+ } else {
-+ tmp.nentries = t->table->nentries;
-+ tmp.entries_size = t->table->entries_size;
-+ tmp.valid_hooks = t->table->valid_hooks;
-+ }
-+ up(&ebt_mutex);
-+ if (copy_to_user(user, &tmp, *len) != 0){
-+ BUGPRINT("c2u Didn't work\n");
-+ ret = -EFAULT;
-+ break;
-+ }
-+ ret = 0;
-+ break;
-+
-+ case EBT_SO_GET_ENTRIES:
-+ case EBT_SO_GET_INIT_ENTRIES:
-+ ret = copy_everything_to_user(t, user, len, cmd);
-+ up(&ebt_mutex);
-+ break;
-+
-+ default:
-+ up(&ebt_mutex);
-+ ret = -EINVAL;
-+ }
-+
-+ return ret;
-+}
-+
-+static struct nf_sockopt_ops ebt_sockopts =
-+{ { NULL, NULL }, PF_INET, EBT_BASE_CTL, EBT_SO_SET_MAX + 1, do_ebt_set_ctl,
-+ EBT_BASE_CTL, EBT_SO_GET_MAX + 1, do_ebt_get_ctl, 0, NULL
-+};
-+
-+static int __init init(void)
-+{
-+ int ret;
-+
-+ down(&ebt_mutex);
-+ list_named_insert(&ebt_targets, &ebt_standard_target);
-+ up(&ebt_mutex);
-+ if ((ret = nf_register_sockopt(&ebt_sockopts)) < 0)
-+ return ret;
-+
-+ printk(KERN_NOTICE "Ebtables v2.0 registered\n");
-+ return 0;
-+}
-+
-+static void __exit fini(void)
-+{
-+ nf_unregister_sockopt(&ebt_sockopts);
-+ printk(KERN_NOTICE "Ebtables v2.0 unregistered\n");
-+}
-+
-+EXPORT_SYMBOL(ebt_register_table);
-+EXPORT_SYMBOL(ebt_unregister_table);
-+EXPORT_SYMBOL(ebt_register_match);
-+EXPORT_SYMBOL(ebt_unregister_match);
-+EXPORT_SYMBOL(ebt_register_watcher);
-+EXPORT_SYMBOL(ebt_unregister_watcher);
-+EXPORT_SYMBOL(ebt_register_target);
-+EXPORT_SYMBOL(ebt_unregister_target);
-+EXPORT_SYMBOL(ebt_do_table);
-+module_init(init);
-+module_exit(fini);
-+MODULE_LICENSE("GPL");
---- /dev/null Thu Aug 24 11:00:32 2000
-+++ linux-2.4.21-ebt-brnf-3/include/linux/netfilter_bridge/ebtables.h Fri Aug 8 01:09:06 2003
-@@ -0,0 +1,361 @@
-+/*
-+ * ebtables
-+ *
-+ * Authors:
-+ * Bart De Schuymer <bart.de.schuymer@pandora.be>
-+ *
-+ * ebtables.c,v 2.0, September, 2002
-+ *
-+ * This code is stongly inspired on the iptables code which is
-+ * Copyright (C) 1999 Paul `Rusty' Russell & Michael J. Neuling
-+ */
-+
-+#ifndef __LINUX_BRIDGE_EFF_H
-+#define __LINUX_BRIDGE_EFF_H
-+#include <linux/if.h>
-+#include <linux/netfilter_bridge.h>
-+#include <linux/if_ether.h>
-+
-+#define EBT_TABLE_MAXNAMELEN 32
-+#define EBT_CHAIN_MAXNAMELEN EBT_TABLE_MAXNAMELEN
-+#define EBT_FUNCTION_MAXNAMELEN EBT_TABLE_MAXNAMELEN
-+
-+// verdicts >0 are "branches"
-+#define EBT_ACCEPT -1
-+#define EBT_DROP -2
-+#define EBT_CONTINUE -3
-+#define EBT_RETURN -4
-+#define NUM_STANDARD_TARGETS 4
-+
-+struct ebt_replace
-+{
-+ char name[EBT_TABLE_MAXNAMELEN];
-+ unsigned int valid_hooks;
-+ // nr of rules in the table
-+ unsigned int nentries;
-+ // total size of the entries
-+ unsigned int entries_size;
-+ // start of the chains
-+ struct ebt_entries *hook_entry[NF_BR_NUMHOOKS];
-+ // nr of counters userspace expects back
-+ unsigned int num_counters;
-+ // where the kernel will put the old counters
-+ struct ebt_counter *counters;
-+ char *entries;
-+};
-+
-+struct ebt_counter
-+{
-+ uint64_t pcnt;
-+ uint64_t bcnt;
-+};
-+
-+struct ebt_entries {
-+ // this field is always set to zero
-+ // See EBT_ENTRY_OR_ENTRIES.
-+ // Must be same size as ebt_entry.bitmask
-+ unsigned int distinguisher;
-+ // the chain name
-+ char name[EBT_CHAIN_MAXNAMELEN];
-+ // counter offset for this chain
-+ unsigned int counter_offset;
-+ // one standard (accept, drop, return) per hook
-+ int policy;
-+ // nr. of entries
-+ unsigned int nentries;
-+ // entry list
-+ char data[0] __attribute__ ((aligned (__alignof__(struct ebt_replace))));
-+};
-+
-+// used for the bitmask of struct ebt_entry
-+
-+// This is a hack to make a difference between an ebt_entry struct and an
-+// ebt_entries struct when traversing the entries from start to end.
-+// Using this simplifies the code alot, while still being able to use
-+// ebt_entries.
-+// Contrary, iptables doesn't use something like ebt_entries and therefore uses
-+// different techniques for naming the policy and such. So, iptables doesn't
-+// need a hack like this.
-+#define EBT_ENTRY_OR_ENTRIES 0x01
-+// these are the normal masks
-+#define EBT_NOPROTO 0x02
-+#define EBT_802_3 0x04
-+#define EBT_SOURCEMAC 0x08
-+#define EBT_DESTMAC 0x10
-+#define EBT_F_MASK (EBT_NOPROTO | EBT_802_3 | EBT_SOURCEMAC | EBT_DESTMAC \
-+ | EBT_ENTRY_OR_ENTRIES)
-+
-+#define EBT_IPROTO 0x01
-+#define EBT_IIN 0x02
-+#define EBT_IOUT 0x04
-+#define EBT_ISOURCE 0x8
-+#define EBT_IDEST 0x10
-+#define EBT_ILOGICALIN 0x20
-+#define EBT_ILOGICALOUT 0x40
-+#define EBT_INV_MASK (EBT_IPROTO | EBT_IIN | EBT_IOUT | EBT_ILOGICALIN \
-+ | EBT_ILOGICALOUT | EBT_ISOURCE | EBT_IDEST)
-+
-+struct ebt_entry_match
-+{
-+ union {
-+ char name[EBT_FUNCTION_MAXNAMELEN];
-+ struct ebt_match *match;
-+ } u;
-+ // size of data
-+ unsigned int match_size;
-+ unsigned char data[0] __attribute__ ((aligned (__alignof__(struct ebt_replace))));
-+};
-+
-+struct ebt_entry_watcher
-+{
-+ union {
-+ char name[EBT_FUNCTION_MAXNAMELEN];
-+ struct ebt_watcher *watcher;
-+ } u;
-+ // size of data
-+ unsigned int watcher_size;
-+ unsigned char data[0] __attribute__ ((aligned (__alignof__(struct ebt_replace))));
-+};
-+
-+struct ebt_entry_target
-+{
-+ union {
-+ char name[EBT_FUNCTION_MAXNAMELEN];
-+ struct ebt_target *target;
-+ } u;
-+ // size of data
-+ unsigned int target_size;
-+ unsigned char data[0] __attribute__ ((aligned (__alignof__(struct ebt_replace))));
-+};
-+
-+#define EBT_STANDARD_TARGET "standard"
-+struct ebt_standard_target
-+{
-+ struct ebt_entry_target target;
-+ int verdict;
-+};
-+
-+// one entry
-+struct ebt_entry {
-+ // this needs to be the first field
-+ unsigned int bitmask;
-+ unsigned int invflags;
-+ uint16_t ethproto;
-+ // the physical in-dev
-+ char in[IFNAMSIZ];
-+ // the logical in-dev
-+ char logical_in[IFNAMSIZ];
-+ // the physical out-dev
-+ char out[IFNAMSIZ];
-+ // the logical out-dev
-+ char logical_out[IFNAMSIZ];
-+ unsigned char sourcemac[ETH_ALEN];
-+ unsigned char sourcemsk[ETH_ALEN];
-+ unsigned char destmac[ETH_ALEN];
-+ unsigned char destmsk[ETH_ALEN];
-+ // sizeof ebt_entry + matches
-+ unsigned int watchers_offset;
-+ // sizeof ebt_entry + matches + watchers
-+ unsigned int target_offset;
-+ // sizeof ebt_entry + matches + watchers + target
-+ unsigned int next_offset;
-+ unsigned char elems[0] __attribute__ ((aligned (__alignof__(struct ebt_replace))));
-+};
-+
-+// [gs]etsockopt numbers
-+#define EBT_BASE_CTL 128
-+
-+#define EBT_SO_SET_ENTRIES (EBT_BASE_CTL)
-+#define EBT_SO_SET_COUNTERS (EBT_SO_SET_ENTRIES+1)
-+#define EBT_SO_SET_MAX (EBT_SO_SET_COUNTERS+1)
-+
-+#define EBT_SO_GET_INFO (EBT_BASE_CTL)
-+#define EBT_SO_GET_ENTRIES (EBT_SO_GET_INFO+1)
-+#define EBT_SO_GET_INIT_INFO (EBT_SO_GET_ENTRIES+1)
-+#define EBT_SO_GET_INIT_ENTRIES (EBT_SO_GET_INIT_INFO+1)
-+#define EBT_SO_GET_MAX (EBT_SO_GET_INIT_ENTRIES+1)
-+
-+#ifdef __KERNEL__
-+
-+// return values for match() functions
-+#define EBT_MATCH 0
-+#define EBT_NOMATCH 1
-+
-+struct ebt_match
-+{
-+ struct list_head list;
-+ const char name[EBT_FUNCTION_MAXNAMELEN];
-+ // 0 == it matches
-+ int (*match)(const struct sk_buff *skb, const struct net_device *in,
-+ const struct net_device *out, const void *matchdata,
-+ unsigned int datalen);
-+ // 0 == let it in
-+ int (*check)(const char *tablename, unsigned int hookmask,
-+ const struct ebt_entry *e, void *matchdata, unsigned int datalen);
-+ void (*destroy)(void *matchdata, unsigned int datalen);
-+ struct module *me;
-+};
-+
-+struct ebt_watcher
-+{
-+ struct list_head list;
-+ const char name[EBT_FUNCTION_MAXNAMELEN];
-+ void (*watcher)(const struct sk_buff *skb, const struct net_device *in,
-+ const struct net_device *out, const void *watcherdata,
-+ unsigned int datalen);
-+ // 0 == let it in
-+ int (*check)(const char *tablename, unsigned int hookmask,
-+ const struct ebt_entry *e, void *watcherdata, unsigned int datalen);
-+ void (*destroy)(void *watcherdata, unsigned int datalen);
-+ struct module *me;
-+};
-+
-+struct ebt_target
-+{
-+ struct list_head list;
-+ const char name[EBT_FUNCTION_MAXNAMELEN];
-+ // returns one of the standard verdicts
-+ int (*target)(struct sk_buff **pskb, unsigned int hooknr,
-+ const struct net_device *in, const struct net_device *out,
-+ const void *targetdata, unsigned int datalen);
-+ // 0 == let it in
-+ int (*check)(const char *tablename, unsigned int hookmask,
-+ const struct ebt_entry *e, void *targetdata, unsigned int datalen);
-+ void (*destroy)(void *targetdata, unsigned int datalen);
-+ struct module *me;
-+};
-+
-+// used for jumping from and into user defined chains (udc)
-+struct ebt_chainstack
-+{
-+ struct ebt_entries *chaininfo; // pointer to chain data
-+ struct ebt_entry *e; // pointer to entry data
-+ unsigned int n; // n'th entry
-+};
-+
-+struct ebt_table_info
-+{
-+ // total size of the entries
-+ unsigned int entries_size;
-+ unsigned int nentries;
-+ // pointers to the start of the chains
-+ struct ebt_entries *hook_entry[NF_BR_NUMHOOKS];
-+ // room to maintain the stack used for jumping from and into udc
-+ struct ebt_chainstack **chainstack;
-+ char *entries;
-+ struct ebt_counter counters[0] ____cacheline_aligned;
-+};
-+
-+struct ebt_table
-+{
-+ struct list_head list;
-+ char name[EBT_TABLE_MAXNAMELEN];
-+ struct ebt_replace *table;
-+ unsigned int valid_hooks;
-+ rwlock_t lock;
-+ // e.g. could be the table explicitly only allows certain
-+ // matches, targets, ... 0 == let it in
-+ int (*check)(const struct ebt_table_info *info,
-+ unsigned int valid_hooks);
-+ // the data used by the kernel
-+ struct ebt_table_info *private;
-+};
-+
-+#define EBT_ALIGN(s) (((s) + (__alignof__(struct ebt_replace)-1)) & \
-+ ~(__alignof__(struct ebt_replace)-1))
-+extern int ebt_register_table(struct ebt_table *table);
-+extern void ebt_unregister_table(struct ebt_table *table);
-+extern int ebt_register_match(struct ebt_match *match);
-+extern void ebt_unregister_match(struct ebt_match *match);
-+extern int ebt_register_watcher(struct ebt_watcher *watcher);
-+extern void ebt_unregister_watcher(struct ebt_watcher *watcher);
-+extern int ebt_register_target(struct ebt_target *target);
-+extern void ebt_unregister_target(struct ebt_target *target);
-+extern unsigned int ebt_do_table(unsigned int hook, struct sk_buff **pskb,
-+ const struct net_device *in, const struct net_device *out,
-+ struct ebt_table *table);
-+
-+ // Used in the kernel match() functions
-+#define FWINV(bool,invflg) ((bool) ^ !!(info->invflags & invflg))
-+// True if the hook mask denotes that the rule is in a base chain,
-+// used in the check() functions
-+#define BASE_CHAIN (hookmask & (1 << NF_BR_NUMHOOKS))
-+// Clear the bit in the hook mask that tells if the rule is on a base chain
-+#define CLEAR_BASE_CHAIN_BIT (hookmask &= ~(1 << NF_BR_NUMHOOKS))
-+// True if the target is not a standard target
-+#define INVALID_TARGET (info->target < -NUM_STANDARD_TARGETS || info->target >= 0)
-+
-+#endif /* __KERNEL__ */
-+
-+// blatently stolen from ip_tables.h
-+// fn returns 0 to continue iteration
-+#define EBT_MATCH_ITERATE(e, fn, args...) \
-+({ \
-+ unsigned int __i; \
-+ int __ret = 0; \
-+ struct ebt_entry_match *__match; \
-+ \
-+ for (__i = sizeof(struct ebt_entry); \
-+ __i < (e)->watchers_offset; \
-+ __i += __match->match_size + \
-+ sizeof(struct ebt_entry_match)) { \
-+ __match = (void *)(e) + __i; \
-+ \
-+ __ret = fn(__match , ## args); \
-+ if (__ret != 0) \
-+ break; \
-+ } \
-+ if (__ret == 0) { \
-+ if (__i != (e)->watchers_offset) \
-+ __ret = -EINVAL; \
-+ } \
-+ __ret; \
-+})
-+
-+#define EBT_WATCHER_ITERATE(e, fn, args...) \
-+({ \
-+ unsigned int __i; \
-+ int __ret = 0; \
-+ struct ebt_entry_watcher *__watcher; \
-+ \
-+ for (__i = e->watchers_offset; \
-+ __i < (e)->target_offset; \
-+ __i += __watcher->watcher_size + \
-+ sizeof(struct ebt_entry_watcher)) { \
-+ __watcher = (void *)(e) + __i; \
-+ \
-+ __ret = fn(__watcher , ## args); \
-+ if (__ret != 0) \
-+ break; \
-+ } \
-+ if (__ret == 0) { \
-+ if (__i != (e)->target_offset) \
-+ __ret = -EINVAL; \
-+ } \
-+ __ret; \
-+})
-+
-+#define EBT_ENTRY_ITERATE(entries, size, fn, args...) \
-+({ \
-+ unsigned int __i; \
-+ int __ret = 0; \
-+ struct ebt_entry *__entry; \
-+ \
-+ for (__i = 0; __i < (size);) { \
-+ __entry = (void *)(entries) + __i; \
-+ __ret = fn(__entry , ## args); \
-+ if (__ret != 0) \
-+ break; \
-+ if (__entry->bitmask != 0) \
-+ __i += __entry->next_offset; \
-+ else \
-+ __i += sizeof(struct ebt_entries); \
-+ } \
-+ if (__ret == 0) { \
-+ if (__i != (size)) \
-+ __ret = -EINVAL; \
-+ } \
-+ __ret; \
-+})
-+
-+#endif
---- /dev/null Thu Aug 24 11:00:32 2000
-+++ linux-2.4.21-ebt-brnf-3/include/linux/netfilter_bridge/ebt_802_3.h Fri Aug 8 01:09:06 2003
-@@ -0,0 +1,60 @@
-+#ifndef __LINUX_BRIDGE_EBT_802_3_H
-+#define __LINUX_BRIDGE_EBT_802_3_H
-+
-+#define EBT_802_3_SAP 0x01
-+#define EBT_802_3_TYPE 0x02
-+
-+#define EBT_802_3_MATCH "802_3"
-+
-+/*
-+ * If frame has DSAP/SSAP value 0xaa you must check the SNAP type
-+ * to discover what kind of packet we're carrying.
-+ */
-+#define CHECK_TYPE 0xaa
-+
-+/*
-+ * Control field may be one or two bytes. If the first byte has
-+ * the value 0x03 then the entire length is one byte, otherwise it is two.
-+ * One byte controls are used in Unnumbered Information frames.
-+ * Two byte controls are used in Numbered Information frames.
-+ */
-+#define IS_UI 0x03
-+
-+#define EBT_802_3_MASK (EBT_802_3_SAP | EBT_802_3_TYPE | EBT_802_3)
-+
-+/* ui has one byte ctrl, ni has two */
-+struct hdr_ui {
-+ uint8_t dsap;
-+ uint8_t ssap;
-+ uint8_t ctrl;
-+ uint8_t orig[3];
-+ uint16_t type;
-+};
-+
-+struct hdr_ni {
-+ uint8_t dsap;
-+ uint8_t ssap;
-+ uint16_t ctrl;
-+ uint8_t orig[3];
-+ uint16_t type;
-+};
-+
-+struct ebt_802_3_hdr {
-+ uint8_t daddr[6];
-+ uint8_t saddr[6];
-+ uint16_t len;
-+ union {
-+ struct hdr_ui ui;
-+ struct hdr_ni ni;
-+ } llc;
-+};
-+
-+struct ebt_802_3_info
-+{
-+ uint8_t sap;
-+ uint16_t type;
-+ uint8_t bitmask;
-+ uint8_t invflags;
-+};
-+
-+#endif
---- /dev/null Thu Aug 24 11:00:32 2000
-+++ linux-2.4.21-ebt-brnf-3/include/linux/netfilter_bridge/ebt_arp.h Fri Aug 8 01:09:06 2003
-@@ -0,0 +1,32 @@
-+#ifndef __LINUX_BRIDGE_EBT_ARP_H
-+#define __LINUX_BRIDGE_EBT_ARP_H
-+
-+#define EBT_ARP_OPCODE 0x01
-+#define EBT_ARP_HTYPE 0x02
-+#define EBT_ARP_PTYPE 0x04
-+#define EBT_ARP_SRC_IP 0x08
-+#define EBT_ARP_DST_IP 0x10
-+#define EBT_ARP_SRC_MAC 0x20
-+#define EBT_ARP_DST_MAC 0x40
-+#define EBT_ARP_MASK (EBT_ARP_OPCODE | EBT_ARP_HTYPE | EBT_ARP_PTYPE | \
-+ EBT_ARP_SRC_IP | EBT_ARP_DST_IP | EBT_ARP_SRC_MAC | EBT_ARP_DST_MAC)
-+#define EBT_ARP_MATCH "arp"
-+
-+struct ebt_arp_info
-+{
-+ uint16_t htype;
-+ uint16_t ptype;
-+ uint16_t opcode;
-+ uint32_t saddr;
-+ uint32_t smsk;
-+ uint32_t daddr;
-+ uint32_t dmsk;
-+ unsigned char smaddr[ETH_ALEN];
-+ unsigned char smmsk[ETH_ALEN];
-+ unsigned char dmaddr[ETH_ALEN];
-+ unsigned char dmmsk[ETH_ALEN];
-+ uint8_t bitmask;
-+ uint8_t invflags;
-+};
-+
-+#endif
---- /dev/null Thu Aug 24 11:00:32 2000
-+++ linux-2.4.21-ebt-brnf-3/include/linux/netfilter_bridge/ebt_ip.h Fri Aug 8 01:09:06 2003
-@@ -0,0 +1,43 @@
-+/*
-+ * ebt_ip
-+ *
-+ * Authors:
-+ * Bart De Schuymer <bart.de.schuymer@pandora.be>
-+ *
-+ * April, 2002
-+ *
-+ * Changes:
-+ * added ip-sport and ip-dport
-+ * Innominate Security Technologies AG <mhopf@innominate.com>
-+ * September, 2002
-+ */
-+
-+#ifndef __LINUX_BRIDGE_EBT_IP_H
-+#define __LINUX_BRIDGE_EBT_IP_H
-+
-+#define EBT_IP_SOURCE 0x01
-+#define EBT_IP_DEST 0x02
-+#define EBT_IP_TOS 0x04
-+#define EBT_IP_PROTO 0x08
-+#define EBT_IP_SPORT 0x10
-+#define EBT_IP_DPORT 0x20
-+#define EBT_IP_MASK (EBT_IP_SOURCE | EBT_IP_DEST | EBT_IP_TOS | EBT_IP_PROTO |\
-+ EBT_IP_SPORT | EBT_IP_DPORT )
-+#define EBT_IP_MATCH "ip"
-+
-+// the same values are used for the invflags
-+struct ebt_ip_info
-+{
-+ uint32_t saddr;
-+ uint32_t daddr;
-+ uint32_t smsk;
-+ uint32_t dmsk;
-+ uint8_t tos;
-+ uint8_t protocol;
-+ uint8_t bitmask;
-+ uint8_t invflags;
-+ uint16_t sport[2];
-+ uint16_t dport[2];
-+};
-+
-+#endif
---- /dev/null Thu Aug 24 11:00:32 2000
-+++ linux-2.4.21-ebt-brnf-3/include/linux/netfilter_bridge/ebt_pkttype.h Fri Aug 8 01:09:06 2003
-@@ -0,0 +1,11 @@
-+#ifndef __LINUX_BRIDGE_EBT_PKTTYPE_H
-+#define __LINUX_BRIDGE_EBT_PKTTYPE_H
-+
-+struct ebt_pkttype_info
-+{
-+ uint8_t pkt_type;
-+ uint8_t invert;
-+};
-+#define EBT_PKTTYPE_MATCH "pkttype"
-+
-+#endif
---- /dev/null Thu Aug 24 11:00:32 2000
-+++ linux-2.4.21-ebt-brnf-3/include/linux/netfilter_bridge/ebt_stp.h Fri Aug 8 01:09:06 2003
-@@ -0,0 +1,46 @@
-+#ifndef __LINUX_BRIDGE_EBT_STP_H
-+#define __LINUX_BRIDGE_EBT_STP_H
-+
-+#define EBT_STP_TYPE 0x0001
-+
-+#define EBT_STP_FLAGS 0x0002
-+#define EBT_STP_ROOTPRIO 0x0004
-+#define EBT_STP_ROOTADDR 0x0008
-+#define EBT_STP_ROOTCOST 0x0010
-+#define EBT_STP_SENDERPRIO 0x0020
-+#define EBT_STP_SENDERADDR 0x0040
-+#define EBT_STP_PORT 0x0080
-+#define EBT_STP_MSGAGE 0x0100
-+#define EBT_STP_MAXAGE 0x0200
-+#define EBT_STP_HELLOTIME 0x0400
-+#define EBT_STP_FWDD 0x0800
-+
-+#define EBT_STP_MASK 0x0fff
-+#define EBT_STP_CONFIG_MASK 0x0ffe
-+
-+#define EBT_STP_MATCH "stp"
-+
-+struct ebt_stp_config_info
-+{
-+ uint8_t flags;
-+ uint16_t root_priol, root_priou;
-+ char root_addr[6], root_addrmsk[6];
-+ uint32_t root_costl, root_costu;
-+ uint16_t sender_priol, sender_priou;
-+ char sender_addr[6], sender_addrmsk[6];
-+ uint16_t portl, portu;
-+ uint16_t msg_agel, msg_ageu;
-+ uint16_t max_agel, max_ageu;
-+ uint16_t hello_timel, hello_timeu;
-+ uint16_t forward_delayl, forward_delayu;
-+};
-+
-+struct ebt_stp_info
-+{
-+ uint8_t type;
-+ struct ebt_stp_config_info config;
-+ uint16_t bitmask;
-+ uint16_t invflags;
-+};
-+
-+#endif
---- /dev/null Thu Aug 24 11:00:32 2000
-+++ linux-2.4.21-ebt-brnf-3/include/linux/netfilter_bridge/ebt_vlan.h Fri Aug 8 01:09:06 2003
-@@ -0,0 +1,20 @@
-+#ifndef __LINUX_BRIDGE_EBT_VLAN_H
-+#define __LINUX_BRIDGE_EBT_VLAN_H
-+
-+#define EBT_VLAN_ID 0x01
-+#define EBT_VLAN_PRIO 0x02
-+#define EBT_VLAN_ENCAP 0x04
-+#define EBT_VLAN_MASK (EBT_VLAN_ID | EBT_VLAN_PRIO | EBT_VLAN_ENCAP)
-+#define EBT_VLAN_MATCH "vlan"
-+
-+struct ebt_vlan_info {
-+ uint16_t id; /* VLAN ID {1-4095} */
-+ uint8_t prio; /* VLAN User Priority {0-7} */
-+ uint16_t encap; /* VLAN Encapsulated frame code {0-65535} */
-+ uint8_t bitmask; /* Args bitmask bit 1=1 - ID arg,
-+ bit 2=1 User-Priority arg, bit 3=1 encap*/
-+ uint8_t invflags; /* Inverse bitmask bit 1=1 - inversed ID arg,
-+ bit 2=1 - inversed Pirority arg */
-+};
-+
-+#endif
---- /dev/null Thu Aug 24 11:00:32 2000
-+++ linux-2.4.21-ebt-brnf-3/include/linux/netfilter_bridge/ebt_log.h Fri Aug 8 01:09:06 2003
-@@ -0,0 +1,17 @@
-+#ifndef __LINUX_BRIDGE_EBT_LOG_H
-+#define __LINUX_BRIDGE_EBT_LOG_H
-+
-+#define EBT_LOG_IP 0x01 // if the frame is made by ip, log the ip information
-+#define EBT_LOG_ARP 0x02
-+#define EBT_LOG_MASK (EBT_LOG_IP | EBT_LOG_ARP)
-+#define EBT_LOG_PREFIX_SIZE 30
-+#define EBT_LOG_WATCHER "log"
-+
-+struct ebt_log_info
-+{
-+ uint8_t loglevel;
-+ uint8_t prefix[EBT_LOG_PREFIX_SIZE];
-+ uint32_t bitmask;
-+};
-+
-+#endif
---- /dev/null Thu Aug 24 11:00:32 2000
-+++ linux-2.4.21-ebt-brnf-3/include/linux/netfilter_bridge/ebt_nat.h Fri Aug 8 01:09:06 2003
-@@ -0,0 +1,13 @@
-+#ifndef __LINUX_BRIDGE_EBT_NAT_H
-+#define __LINUX_BRIDGE_EBT_NAT_H
-+
-+struct ebt_nat_info
-+{
-+ unsigned char mac[ETH_ALEN];
-+ // EBT_ACCEPT, EBT_DROP, EBT_CONTINUE or EBT_RETURN
-+ int target;
-+};
-+#define EBT_SNAT_TARGET "snat"
-+#define EBT_DNAT_TARGET "dnat"
-+
-+#endif
---- /dev/null Thu Aug 24 11:00:32 2000
-+++ linux-2.4.21-ebt-brnf-3/include/linux/netfilter_bridge/ebt_redirect.h Fri Aug 8 01:09:06 2003
-@@ -0,0 +1,11 @@
-+#ifndef __LINUX_BRIDGE_EBT_REDIRECT_H
-+#define __LINUX_BRIDGE_EBT_REDIRECT_H
-+
-+struct ebt_redirect_info
-+{
-+ // EBT_ACCEPT, EBT_DROP or EBT_CONTINUE or EBT_RETURN
-+ int target;
-+};
-+#define EBT_REDIRECT_TARGET "redirect"
-+
-+#endif
---- /dev/null Thu Aug 24 11:00:32 2000
-+++ linux-2.4.21-ebt-brnf-3/include/linux/netfilter_bridge/ebt_mark_m.h Fri Aug 8 01:09:06 2003
-@@ -0,0 +1,15 @@
-+#ifndef __LINUX_BRIDGE_EBT_MARK_M_H
-+#define __LINUX_BRIDGE_EBT_MARK_M_H
-+
-+#define EBT_MARK_AND 0x01
-+#define EBT_MARK_OR 0x02
-+#define EBT_MARK_MASK (EBT_MARK_AND | EBT_MARK_OR)
-+struct ebt_mark_m_info
-+{
-+ unsigned long mark, mask;
-+ uint8_t invert;
-+ uint8_t bitmask;
-+};
-+#define EBT_MARK_MATCH "mark_m"
-+
-+#endif
---- /dev/null Thu Aug 24 11:00:32 2000
-+++ linux-2.4.21-ebt-brnf-3/include/linux/netfilter_bridge/ebt_mark_t.h Fri Aug 8 01:09:06 2003
-@@ -0,0 +1,12 @@
-+#ifndef __LINUX_BRIDGE_EBT_MARK_T_H
-+#define __LINUX_BRIDGE_EBT_MARK_T_H
-+
-+struct ebt_mark_t_info
-+{
-+ unsigned long mark;
-+ // EBT_ACCEPT, EBT_DROP or EBT_CONTINUE or EBT_RETURN
-+ int target;
-+};
-+#define EBT_MARK_TARGET "mark"
-+
-+#endif
---- linux-2.4.21/include/linux/netfilter.h Thu Nov 22 20:47:48 2001
-+++ linux-2.4.21-ebt-brnf-3/include/linux/netfilter.h Fri Aug 8 01:09:06 2003
-@@ -117,28 +117,34 @@ extern struct list_head nf_hooks[NPROTO]
- /* This is gross, but inline doesn't cut it for avoiding the function
- call in fast path: gcc doesn't inline (needs value tracking?). --RR */
- #ifdef CONFIG_NETFILTER_DEBUG
--#define NF_HOOK nf_hook_slow
-+#define NF_HOOK(pf, hook, skb, indev, outdev, okfn) \
-+nf_hook_slow((pf), (hook), (skb), (indev), (outdev), (okfn), INT_MIN)
-+#define NF_HOOK_THRESH nf_hook_slow
- #else
- #define NF_HOOK(pf, hook, skb, indev, outdev, okfn) \
- (list_empty(&nf_hooks[(pf)][(hook)]) \
- ? (okfn)(skb) \
-- : nf_hook_slow((pf), (hook), (skb), (indev), (outdev), (okfn)))
-+ : nf_hook_slow((pf), (hook), (skb), (indev), (outdev), (okfn), INT_MIN))
-+#define NF_HOOK_THRESH(pf, hook, skb, indev, outdev, okfn, thresh) \
-+(list_empty(&nf_hooks[(pf)][(hook)]) \
-+ ? (okfn)(skb) \
-+ : nf_hook_slow((pf), (hook), (skb), (indev), (outdev), (okfn), (thresh)))
- #endif
-
- int nf_hook_slow(int pf, unsigned int hook, struct sk_buff *skb,
- struct net_device *indev, struct net_device *outdev,
-- int (*okfn)(struct sk_buff *));
-+ int (*okfn)(struct sk_buff *), int thresh);
-
- /* Call setsockopt() */
--int nf_setsockopt(struct sock *sk, int pf, int optval, char *opt,
-+int nf_setsockopt(struct sock *sk, int pf, int optval, char *opt,
- int len);
- int nf_getsockopt(struct sock *sk, int pf, int optval, char *opt,
- int *len);
-
- /* Packet queuing */
--typedef int (*nf_queue_outfn_t)(struct sk_buff *skb,
-+typedef int (*nf_queue_outfn_t)(struct sk_buff *skb,
- struct nf_info *info, void *data);
--extern int nf_register_queue_handler(int pf,
-+extern int nf_register_queue_handler(int pf,
- nf_queue_outfn_t outfn, void *data);
- extern int nf_unregister_queue_handler(int pf);
- extern void nf_reinject(struct sk_buff *skb,
---- linux-2.4.21/include/linux/netfilter_ipv4.h Mon Feb 25 20:38:13 2002
-+++ linux-2.4.21-ebt-brnf-3/include/linux/netfilter_ipv4.h Fri Aug 8 01:09:06 2003
-@@ -52,8 +52,10 @@
- enum nf_ip_hook_priorities {
- NF_IP_PRI_FIRST = INT_MIN,
- NF_IP_PRI_CONNTRACK = -200,
-+ NF_IP_PRI_BRIDGE_SABOTAGE_FORWARD = -175,
- NF_IP_PRI_MANGLE = -150,
- NF_IP_PRI_NAT_DST = -100,
-+ NF_IP_PRI_BRIDGE_SABOTAGE_LOCAL_OUT = -50,
- NF_IP_PRI_FILTER = 0,
- NF_IP_PRI_NAT_SRC = 100,
- NF_IP_PRI_LAST = INT_MAX,
---- linux-2.4.21/include/linux/skbuff.h Fri Jun 13 16:51:39 2003
-+++ linux-2.4.21-ebt-brnf-3/include/linux/skbuff.h Fri Aug 8 01:09:06 2003
-@@ -92,6 +92,17 @@ struct nf_conntrack {
- struct nf_ct_info {
- struct nf_conntrack *master;
- };
-+
-+#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
-+struct nf_bridge_info {
-+ atomic_t use;
-+ struct net_device *physindev;
-+ struct net_device *physoutdev;
-+ unsigned int mask;
-+ unsigned long hh[16 / sizeof(unsigned long)];
-+};
-+#endif
-+
- #endif
-
- struct sk_buff_head {
-@@ -204,6 +215,9 @@ struct sk_buff {
- #ifdef CONFIG_NETFILTER_DEBUG
- unsigned int nf_debug;
- #endif
-+#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
-+ struct nf_bridge_info *nf_bridge; /* Saved data about a bridged frame - see br_netfilter.c */
-+#endif
- #endif /*CONFIG_NETFILTER*/
-
- #if defined(CONFIG_HIPPI)
-@@ -278,7 +292,7 @@ static inline struct sk_buff *skb_get(st
- * If users==1, we are the only owner and are can avoid redundant
- * atomic change.
- */
--
-+
- /**
- * kfree_skb - free an sk_buff
- * @skb: buffer to free
-@@ -286,7 +300,7 @@ static inline struct sk_buff *skb_get(st
- * Drop a reference to the buffer and free it if the usage count has
- * hit zero.
- */
--
-+
- static inline void kfree_skb(struct sk_buff *skb)
- {
- if (atomic_read(&skb->users) == 1 || atomic_dec_and_test(&skb->users))
-@@ -1165,6 +1179,20 @@ nf_conntrack_get(struct nf_ct_info *nfct
- if (nfct)
- atomic_inc(&nfct->master->use);
- }
-+
-+#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
-+static inline void nf_bridge_put(struct nf_bridge_info *nf_bridge)
-+{
-+ if (nf_bridge && atomic_dec_and_test(&nf_bridge->use))
-+ kfree(nf_bridge);
-+}
-+static inline void nf_bridge_get(struct nf_bridge_info *nf_bridge)
-+{
-+ if (nf_bridge)
-+ atomic_inc(&nf_bridge->use);
-+}
-+#endif
-+
- #endif
-
- #endif /* __KERNEL__ */
---- linux-2.4.21/net/core/netfilter.c Sat Aug 3 02:39:46 2002
-+++ linux-2.4.21-ebt-brnf-3/net/core/netfilter.c Fri Aug 8 01:09:06 2003
-@@ -1,4 +1,4 @@
--/* netfilter.c: look after the filters for various protocols.
-+/* netfilter.c: look after the filters for various protocols.
- * Heavily influenced by the old firewall.c by David Bonn and Alan Cox.
- *
- * Thanks to Rob `CmdrTaco' Malda for not influencing this code in any
-@@ -342,10 +342,15 @@ static unsigned int nf_iterate(struct li
- const struct net_device *indev,
- const struct net_device *outdev,
- struct list_head **i,
-- int (*okfn)(struct sk_buff *))
-+ int (*okfn)(struct sk_buff *),
-+ int hook_thresh)
- {
- for (*i = (*i)->next; *i != head; *i = (*i)->next) {
- struct nf_hook_ops *elem = (struct nf_hook_ops *)*i;
-+
-+ if (hook_thresh > elem->priority)
-+ continue;
-+
- switch (elem->hook(hook, skb, indev, outdev, okfn)) {
- case NF_QUEUE:
- return NF_QUEUE;
-@@ -365,7 +370,7 @@ static unsigned int nf_iterate(struct li
- break;
-
- default:
-- NFDEBUG("Evil return from %p(%u).\n",
-+ NFDEBUG("Evil return from %p(%u).\n",
- elem->hook, hook);
- #endif
- }
-@@ -374,7 +379,7 @@ static unsigned int nf_iterate(struct li
- }
-
- int nf_register_queue_handler(int pf, nf_queue_outfn_t outfn, void *data)
--{
-+{
- int ret;
-
- br_write_lock_bh(BR_NETPROTO_LOCK);
-@@ -400,12 +405,12 @@ int nf_unregister_queue_handler(int pf)
- return 0;
- }
-
--/*
-- * Any packet that leaves via this function must come back
-+/*
-+ * Any packet that leaves via this function must come back
- * through nf_reinject().
- */
--static void nf_queue(struct sk_buff *skb,
-- struct list_head *elem,
-+static void nf_queue(struct sk_buff *skb,
-+ struct list_head *elem,
- int pf, unsigned int hook,
- struct net_device *indev,
- struct net_device *outdev,
-@@ -413,6 +418,10 @@ static void nf_queue(struct sk_buff *skb
- {
- int status;
- struct nf_info *info;
-+#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
-+ struct net_device *physindev = NULL;
-+ struct net_device *physoutdev = NULL;
-+#endif
-
- if (!queue_handler[pf].outfn) {
- kfree_skb(skb);
-@@ -428,18 +437,31 @@ static void nf_queue(struct sk_buff *skb
- return;
- }
-
-- *info = (struct nf_info) {
-+ *info = (struct nf_info) {
- (struct nf_hook_ops *)elem, pf, hook, indev, outdev, okfn };
-
- /* Bump dev refs so they don't vanish while packet is out */
- if (indev) dev_hold(indev);
- if (outdev) dev_hold(outdev);
-
-+#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
-+ if (skb->nf_bridge) {
-+ physindev = skb->nf_bridge->physindev;
-+ if (physindev) dev_hold(physindev);
-+ physoutdev = skb->nf_bridge->physoutdev;
-+ if (physoutdev) dev_hold(physoutdev);
-+ }
-+#endif
-+
- status = queue_handler[pf].outfn(skb, info, queue_handler[pf].data);
- if (status < 0) {
- /* James M doesn't say fuck enough. */
- if (indev) dev_put(indev);
- if (outdev) dev_put(outdev);
-+#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
-+ if (physindev) dev_put(physindev);
-+ if (physoutdev) dev_put(physoutdev);
-+#endif
- kfree(info);
- kfree_skb(skb);
- return;
-@@ -449,7 +471,8 @@ static void nf_queue(struct sk_buff *skb
- int nf_hook_slow(int pf, unsigned int hook, struct sk_buff *skb,
- struct net_device *indev,
- struct net_device *outdev,
-- int (*okfn)(struct sk_buff *))
-+ int (*okfn)(struct sk_buff *),
-+ int hook_thresh)
- {
- struct list_head *elem;
- unsigned int verdict;
-@@ -481,7 +504,7 @@ int nf_hook_slow(int pf, unsigned int ho
-
- elem = &nf_hooks[pf][hook];
- verdict = nf_iterate(&nf_hooks[pf][hook], &skb, hook, indev,
-- outdev, &elem, okfn);
-+ outdev, &elem, okfn, hook_thresh);
- if (verdict == NF_QUEUE) {
- NFDEBUG("nf_hook: Verdict = QUEUE.\n");
- nf_queue(skb, elem, pf, hook, indev, outdev, okfn);
-@@ -510,6 +533,14 @@ void nf_reinject(struct sk_buff *skb, st
-
- /* We don't have BR_NETPROTO_LOCK here */
- br_read_lock_bh(BR_NETPROTO_LOCK);
-+#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
-+ if (skb->nf_bridge) {
-+ if (skb->nf_bridge->physindev)
-+ dev_put(skb->nf_bridge->physindev);
-+ if (skb->nf_bridge->physoutdev)
-+ dev_put(skb->nf_bridge->physoutdev);
-+ }
-+#endif
- for (i = nf_hooks[info->pf][info->hook].next; i != elem; i = i->next) {
- if (i == &nf_hooks[info->pf][info->hook]) {
- /* The module which sent it to userspace is gone. */
-@@ -528,9 +559,9 @@ void nf_reinject(struct sk_buff *skb, st
-
- if (verdict == NF_ACCEPT) {
- verdict = nf_iterate(&nf_hooks[info->pf][info->hook],
-- &skb, info->hook,
-+ &skb, info->hook,
- info->indev, info->outdev, &elem,
-- info->okfn);
-+ info->okfn, INT_MIN);
- }
-
- switch (verdict) {
-@@ -539,20 +570,19 @@ void nf_reinject(struct sk_buff *skb, st
- break;
-
- case NF_QUEUE:
-- nf_queue(skb, elem, info->pf, info->hook,
-+ nf_queue(skb, elem, info->pf, info->hook,
- info->indev, info->outdev, info->okfn);
- break;
--
-- case NF_DROP:
-- kfree_skb(skb);
-- break;
- }
- br_read_unlock_bh(BR_NETPROTO_LOCK);
-
- /* Release those devices we held, or Alexey will kill me. */
- if (info->indev) dev_put(info->indev);
- if (info->outdev) dev_put(info->outdev);
--
-+
-+ if (verdict == NF_DROP)
-+ kfree_skb(skb);
-+
- kfree(info);
- return;
- }
---- linux-2.4.21/net/core/skbuff.c Fri Jun 13 16:51:39 2003
-+++ linux-2.4.21-ebt-brnf-3/net/core/skbuff.c Fri Aug 8 01:09:06 2003
-@@ -245,6 +245,9 @@ static inline void skb_headerinit(void *
- #ifdef CONFIG_NETFILTER_DEBUG
- skb->nf_debug = 0;
- #endif
-+#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
-+ skb->nf_bridge = NULL;
-+#endif
- #endif
- #ifdef CONFIG_NET_SCHED
- skb->tc_index = 0;
-@@ -325,6 +328,9 @@ void __kfree_skb(struct sk_buff *skb)
- }
- #ifdef CONFIG_NETFILTER
- nf_conntrack_put(skb->nfct);
-+#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
-+ nf_bridge_put(skb->nf_bridge);
-+#endif
- #endif
- skb_headerinit(skb, NULL, 0); /* clean state */
- kfree_skbmem(skb);
-@@ -391,6 +397,9 @@ struct sk_buff *skb_clone(struct sk_buff
- #ifdef CONFIG_NETFILTER_DEBUG
- C(nf_debug);
- #endif
-+#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
-+ C(nf_bridge);
-+#endif
- #endif /*CONFIG_NETFILTER*/
- #if defined(CONFIG_HIPPI)
- C(private);
-@@ -403,6 +412,9 @@ struct sk_buff *skb_clone(struct sk_buff
- skb->cloned = 1;
- #ifdef CONFIG_NETFILTER
- nf_conntrack_get(skb->nfct);
-+#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
-+ nf_bridge_get(skb->nf_bridge);
-+#endif
- #endif
- return n;
- }
-@@ -436,6 +448,10 @@ static void copy_skb_header(struct sk_bu
- nf_conntrack_get(new->nfct);
- #ifdef CONFIG_NETFILTER_DEBUG
- new->nf_debug=old->nf_debug;
-+#endif
-+#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
-+ new->nf_bridge=old->nf_bridge;
-+ nf_bridge_get(new->nf_bridge);
- #endif
- #endif
- #ifdef CONFIG_NET_SCHED
---- linux-2.4.21/net/ipv4/netfilter/ip_tables.c Fri Jun 13 16:51:39 2003
-+++ linux-2.4.21-ebt-brnf-3/net/ipv4/netfilter/ip_tables.c Fri Aug 8 01:09:06 2003
-@@ -121,12 +121,19 @@ static LIST_HEAD(ipt_tables);
- static inline int
- ip_packet_match(const struct iphdr *ip,
- const char *indev,
-+#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
-+ const char *physindev,
-+#endif
- const char *outdev,
-+#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
-+ const char *physoutdev,
-+#endif
- const struct ipt_ip *ipinfo,
- int isfrag)
- {
- size_t i;
- unsigned long ret;
-+ unsigned long ret2 = 1;
-
- #define FWINV(bool,invflg) ((bool) ^ !!(ipinfo->invflags & invflg))
-
-@@ -156,7 +163,15 @@ ip_packet_match(const struct iphdr *ip,
- & ((const unsigned long *)ipinfo->iniface_mask)[i];
- }
-
-- if (FWINV(ret != 0, IPT_INV_VIA_IN)) {
-+#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
-+ for (i = 0, ret2 = 0; i < IFNAMSIZ/sizeof(unsigned long); i++) {
-+ ret2 |= (((const unsigned long *)physindev)[i]
-+ ^ ((const unsigned long *)ipinfo->iniface)[i])
-+ & ((const unsigned long *)ipinfo->iniface_mask)[i];
-+ }
-+#endif
-+
-+ if (FWINV(ret != 0 && ret2 != 0, IPT_INV_VIA_IN)) {
- dprintf("VIA in mismatch (%s vs %s).%s\n",
- indev, ipinfo->iniface,
- ipinfo->invflags&IPT_INV_VIA_IN ?" (INV)":"");
-@@ -169,7 +184,15 @@ ip_packet_match(const struct iphdr *ip,
- & ((const unsigned long *)ipinfo->outiface_mask)[i];
- }
-
-- if (FWINV(ret != 0, IPT_INV_VIA_OUT)) {
-+#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
-+ for (i = 0, ret2 = 0; i < IFNAMSIZ/sizeof(unsigned long); i++) {
-+ ret2 |= (((const unsigned long *)physoutdev)[i]
-+ ^ ((const unsigned long *)ipinfo->outiface)[i])
-+ & ((const unsigned long *)ipinfo->outiface_mask)[i];
-+ }
-+#endif
-+
-+ if (FWINV(ret != 0 && ret2 != 0, IPT_INV_VIA_OUT)) {
- dprintf("VIA out mismatch (%s vs %s).%s\n",
- outdev, ipinfo->outiface,
- ipinfo->invflags&IPT_INV_VIA_OUT ?" (INV)":"");
-@@ -268,6 +291,9 @@ ipt_do_table(struct sk_buff **pskb,
- /* Initializing verdict to NF_DROP keeps gcc happy. */
- unsigned int verdict = NF_DROP;
- const char *indev, *outdev;
-+#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
-+ const char *physindev, *physoutdev;
-+#endif
- void *table_base;
- struct ipt_entry *e, *back;
-
-@@ -277,6 +303,13 @@ ipt_do_table(struct sk_buff **pskb,
- datalen = (*pskb)->len - ip->ihl * 4;
- indev = in ? in->name : nulldevname;
- outdev = out ? out->name : nulldevname;
-+#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
-+ physindev = ((*pskb)->nf_bridge && (*pskb)->nf_bridge->physindev) ?
-+ (*pskb)->nf_bridge->physindev->name : nulldevname;
-+ physoutdev = ((*pskb)->nf_bridge && (*pskb)->nf_bridge->physoutdev) ?
-+ (*pskb)->nf_bridge->physoutdev->name : nulldevname;
-+#endif
-+
- /* We handle fragments by dealing with the first fragment as
- * if it was a normal packet. All other fragments are treated
- * normally, except that they will NEVER match rules that ask
-@@ -312,7 +345,15 @@ ipt_do_table(struct sk_buff **pskb,
- IP_NF_ASSERT(e);
- IP_NF_ASSERT(back);
- (*pskb)->nfcache |= e->nfcache;
-- if (ip_packet_match(ip, indev, outdev, &e->ip, offset)) {
-+ if (ip_packet_match(ip, indev,
-+#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
-+ physindev,
-+#endif
-+ outdev,
-+#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
-+ physoutdev,
-+#endif
-+ &e->ip, offset)) {
- struct ipt_entry_target *t;
-
- if (IPT_MATCH_ITERATE(e, do_match,
---- linux-2.4.21/net/ipv4/ip_output.c Fri Nov 29 00:53:15 2002
-+++ linux-2.4.21-ebt-brnf-3/net/ipv4/ip_output.c Fri Aug 8 01:09:06 2003
-@@ -879,6 +879,10 @@ int ip_fragment(struct sk_buff *skb, int
- /* Connection association is same as pre-frag packet */
- skb2->nfct = skb->nfct;
- nf_conntrack_get(skb2->nfct);
-+#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
-+ skb2->nf_bridge = skb->nf_bridge;
-+ nf_bridge_get(skb2->nf_bridge);
-+#endif
- #ifdef CONFIG_NETFILTER_DEBUG
- skb2->nf_debug = skb->nf_debug;
- #endif
---- linux-2.4.21/net/ipv4/netfilter/ipt_LOG.c Mon Feb 25 20:38:14 2002
-+++ linux-2.4.21-ebt-brnf-3/net/ipv4/netfilter/ipt_LOG.c Fri Aug 8 01:09:06 2003
-@@ -289,6 +289,18 @@ ipt_log_target(struct sk_buff **pskb,
- loginfo->prefix,
- in ? in->name : "",
- out ? out->name : "");
-+#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
-+ if ((*pskb)->nf_bridge) {
-+ struct net_device *physindev = (*pskb)->nf_bridge->physindev;
-+ struct net_device *physoutdev = (*pskb)->nf_bridge->physoutdev;
-+
-+ if (physindev && in != physindev)
-+ printk("PHYSIN=%s ", physindev->name);
-+ if (physoutdev && out != physoutdev)
-+ printk("PHYSOUT=%s ", physoutdev->name);
-+ }
-+#endif
-+
- if (in && !out) {
- /* MAC logging for input chain only. */
- printk("MAC=");
---- linux-2.4.21/net/ipv4/netfilter/Makefile Fri Jun 13 16:51:39 2003
-+++ linux-2.4.21-ebt-brnf-3/net/ipv4/netfilter/Makefile Fri Aug 8 01:09:06 2003
-@@ -84,6 +84,8 @@ obj-$(CONFIG_IP_NF_MATCH_CONNTRACK) += i
- obj-$(CONFIG_IP_NF_MATCH_UNCLEAN) += ipt_unclean.o
- obj-$(CONFIG_IP_NF_MATCH_TCPMSS) += ipt_tcpmss.o
-
-+obj-$(CONFIG_IP_NF_MATCH_PHYSDEV) += ipt_physdev.o
-+
- # targets
- obj-$(CONFIG_IP_NF_TARGET_REJECT) += ipt_REJECT.o
- obj-$(CONFIG_IP_NF_TARGET_MIRROR) += ipt_MIRROR.o
---- linux-2.4.21/net/ipv4/netfilter/Config.in Fri Jun 13 16:51:39 2003
-+++ linux-2.4.21-ebt-brnf-3/net/ipv4/netfilter/Config.in Fri Aug 8 01:09:06 2003
-@@ -43,6 +43,9 @@ if [ "$CONFIG_IP_NF_IPTABLES" != "n" ];
- dep_tristate ' Unclean match support (EXPERIMENTAL)' CONFIG_IP_NF_MATCH_UNCLEAN $CONFIG_IP_NF_IPTABLES
- dep_tristate ' Owner match support (EXPERIMENTAL)' CONFIG_IP_NF_MATCH_OWNER $CONFIG_IP_NF_IPTABLES
- fi
-+ if [ "$CONFIG_BRIDGE" != "n" ]; then
-+ dep_tristate ' Physdev match support' CONFIG_IP_NF_MATCH_PHYSDEV
-+ fi
- # The targets
- dep_tristate ' Packet filtering' CONFIG_IP_NF_FILTER $CONFIG_IP_NF_IPTABLES
- if [ "$CONFIG_IP_NF_FILTER" != "n" ]; then
---- /dev/null Thu Aug 24 11:00:32 2000
-+++ linux-2.4.21-ebt-brnf-3/net/bridge/br_netfilter.c Fri Aug 8 01:09:06 2003
-@@ -0,0 +1,636 @@
-+/*
-+ * Handle firewalling
-+ * Linux ethernet bridge
-+ *
-+ * Authors:
-+ * Lennert Buytenhek <buytenh@gnu.org>
-+ * Bart De Schuymer <bdschuym@pandora.be>
-+ *
-+ * This program is free software; you can redistribute it and/or
-+ * modify it under the terms of the GNU General Public License
-+ * as published by the Free Software Foundation; either version
-+ * 2 of the License, or (at your option) any later version.
-+ *
-+ * Lennert dedicates this file to Kerstin Wurdinger.
-+ */
-+
-+#include <linux/module.h>
-+#include <linux/kernel.h>
-+#include <linux/ip.h>
-+#include <linux/netdevice.h>
-+#include <linux/skbuff.h>
-+#include <linux/if_ether.h>
-+#include <linux/netfilter_bridge.h>
-+#include <linux/netfilter_ipv4.h>
-+#include <linux/in_route.h>
-+#include <net/ip.h>
-+#include <asm/uaccess.h>
-+#include <asm/checksum.h>
-+#include "br_private.h"
-+
-+
-+#define skb_origaddr(skb) (((struct bridge_skb_cb *) \
-+ (skb->cb))->daddr.ipv4)
-+#define store_orig_dstaddr(skb) (skb_origaddr(skb) = (skb)->nh.iph->daddr)
-+#define dnat_took_place(skb) (skb_origaddr(skb) != (skb)->nh.iph->daddr)
-+#define clear_cb(skb) (memset(&skb_origaddr(skb), 0, \
-+ sizeof(struct bridge_skb_cb)))
-+
-+#define has_bridge_parent(device) ((device)->br_port != NULL)
-+#define bridge_parent(device) (&((device)->br_port->br->dev))
-+
-+/* We need these fake structures to make netfilter happy --
-+ * lots of places assume that skb->dst != NULL, which isn't
-+ * all that unreasonable.
-+ *
-+ * Currently, we fill in the PMTU entry because netfilter
-+ * refragmentation needs it, and the rt_flags entry because
-+ * ipt_REJECT needs it. Future netfilter modules might
-+ * require us to fill additional fields.
-+ */
-+static struct net_device __fake_net_device = {
-+ .hard_header_len = ETH_HLEN
-+};
-+
-+static struct rtable __fake_rtable = {
-+ u: {
-+ dst: {
-+ __refcnt: ATOMIC_INIT(1),
-+ dev: &__fake_net_device,
-+ pmtu: 1500
-+ }
-+ },
-+
-+ rt_flags: 0
-+};
-+
-+
-+/* PF_BRIDGE/PRE_ROUTING *********************************************/
-+static void __br_dnat_complain(void)
-+{
-+ static unsigned long last_complaint = 0;
-+
-+ if (jiffies - last_complaint >= 5 * HZ) {
-+ printk(KERN_WARNING "Performing cross-bridge DNAT requires IP "
-+ "forwarding to be enabled\n");
-+ last_complaint = jiffies;
-+ }
-+}
-+
-+
-+/* This requires some explaining. If DNAT has taken place,
-+ * we will need to fix up the destination Ethernet address,
-+ * and this is a tricky process.
-+ *
-+ * There are two cases to consider:
-+ * 1. The packet was DNAT'ed to a device in the same bridge
-+ * port group as it was received on. We can still bridge
-+ * the packet.
-+ * 2. The packet was DNAT'ed to a different device, either
-+ * a non-bridged device or another bridge port group.
-+ * The packet will need to be routed.
-+ *
-+ * The correct way of distinguishing between these two cases is to
-+ * call ip_route_input() and to look at skb->dst->dev, which is
-+ * changed to the destination device if ip_route_input() succeeds.
-+ *
-+ * Let us first consider the case that ip_route_input() succeeds:
-+ *
-+ * If skb->dst->dev equals the logical bridge device the packet
-+ * came in on, we can consider this bridging. We then call
-+ * skb->dst->output() which will make the packet enter br_nf_local_out()
-+ * not much later. In that function it is assured that the iptables
-+ * FORWARD chain is traversed for the packet.
-+ *
-+ * Otherwise, the packet is considered to be routed and we just
-+ * change the destination MAC address so that the packet will
-+ * later be passed up to the IP stack to be routed.
-+ *
-+ * Let us now consider the case that ip_route_input() fails:
-+ *
-+ * After a "echo '0' > /proc/sys/net/ipv4/ip_forward" ip_route_input()
-+ * will fail, while __ip_route_output_key() will return success. The source
-+ * address for __ip_route_output_key() is set to zero, so __ip_route_output_key
-+ * thinks we're handling a locally generated packet and won't care
-+ * if IP forwarding is allowed. We send a warning message to the users's
-+ * log telling her to put IP forwarding on.
-+ *
-+ * ip_route_input() will also fail if there is no route available.
-+ * In that case we just drop the packet.
-+ *
-+ * --Lennert, 20020411
-+ * --Bart, 20020416 (updated)
-+ * --Bart, 20021007 (updated)
-+ */
-+
-+static int br_nf_pre_routing_finish_bridge(struct sk_buff *skb)
-+{
-+#ifdef CONFIG_NETFILTER_DEBUG
-+ skb->nf_debug |= (1 << NF_BR_PRE_ROUTING) | (1 << NF_BR_FORWARD);
-+#endif
-+
-+ if (skb->pkt_type == PACKET_OTHERHOST) {
-+ skb->pkt_type = PACKET_HOST;
-+ skb->nf_bridge->mask |= BRNF_PKT_TYPE;
-+ }
-+
-+ skb->dev = bridge_parent(skb->dev);
-+ skb->dst->output(skb);
-+ return 0;
-+}
-+
-+static int br_nf_pre_routing_finish(struct sk_buff *skb)
-+{
-+ struct net_device *dev = skb->dev;
-+ struct iphdr *iph = skb->nh.iph;
-+ struct nf_bridge_info *nf_bridge = skb->nf_bridge;
-+
-+#ifdef CONFIG_NETFILTER_DEBUG
-+ skb->nf_debug ^= (1 << NF_BR_PRE_ROUTING);
-+#endif
-+
-+ if (nf_bridge->mask & BRNF_PKT_TYPE) {
-+ skb->pkt_type = PACKET_OTHERHOST;
-+ nf_bridge->mask ^= BRNF_PKT_TYPE;
-+ }
-+
-+ if (dnat_took_place(skb)) {
-+ if (ip_route_input(skb, iph->daddr, iph->saddr, iph->tos,
-+ dev)) {
-+ struct rtable *rt;
-+
-+ if (!ip_route_output(&rt, iph->daddr, 0, iph->tos, 0)) {
-+ /* Bridged-and-DNAT'ed traffic doesn't
-+ * require ip_forwarding.
-+ */
-+ if (((struct dst_entry *)rt)->dev == dev) {
-+ skb->dst = (struct dst_entry *)rt;
-+ goto bridged_dnat;
-+ }
-+ __br_dnat_complain();
-+ dst_release((struct dst_entry *)rt);
-+ }
-+ kfree_skb(skb);
-+ return 0;
-+ } else {
-+ if (skb->dst->dev == dev) {
-+bridged_dnat:
-+ /* Tell br_nf_local_out this is a
-+ * bridged frame
-+ */
-+ nf_bridge->mask |= BRNF_BRIDGED_DNAT;
-+ skb->dev = nf_bridge->physindev;
-+ clear_cb(skb);
-+ NF_HOOK_THRESH(PF_BRIDGE, NF_BR_PRE_ROUTING,
-+ skb, skb->dev, NULL,
-+ br_nf_pre_routing_finish_bridge,
-+ 1);
-+ return 0;
-+ }
-+ memcpy(skb->mac.ethernet->h_dest, dev->dev_addr,
-+ ETH_ALEN);
-+ }
-+ } else {
-+ skb->dst = (struct dst_entry *)&__fake_rtable;
-+ dst_hold(skb->dst);
-+ }
-+
-+ clear_cb(skb);
-+ skb->dev = nf_bridge->physindev;
-+ NF_HOOK_THRESH(PF_BRIDGE, NF_BR_PRE_ROUTING, skb, skb->dev, NULL,
-+ br_handle_frame_finish, 1);
-+
-+ return 0;
-+}
-+
-+/* Replicate the checks that IPv4 does on packet reception.
-+ * Set skb->dev to the bridge device (i.e. parent of the
-+ * receiving device) to make netfilter happy, the REDIRECT
-+ * target in particular. Save the original destination IP
-+ * address to be able to detect DNAT afterwards.
-+ */
-+static unsigned int br_nf_pre_routing(unsigned int hook, struct sk_buff **pskb,
-+ const struct net_device *in, const struct net_device *out,
-+ int (*okfn)(struct sk_buff *))
-+{
-+ struct iphdr *iph;
-+ __u32 len;
-+ struct sk_buff *skb;
-+ struct nf_bridge_info *nf_bridge;
-+
-+ if ((*pskb)->protocol != __constant_htons(ETH_P_IP))
-+ return NF_ACCEPT;
-+
-+ if ((skb = skb_share_check(*pskb, GFP_ATOMIC)) == NULL)
-+ goto out;
-+
-+ if (!pskb_may_pull(skb, sizeof(struct iphdr)))
-+ goto inhdr_error;
-+
-+ iph = skb->nh.iph;
-+ if (iph->ihl < 5 || iph->version != 4)
-+ goto inhdr_error;
-+
-+ if (!pskb_may_pull(skb, 4*iph->ihl))
-+ goto inhdr_error;
-+
-+ iph = skb->nh.iph;
-+ if (ip_fast_csum((__u8 *)iph, iph->ihl) != 0)
-+ goto inhdr_error;
-+
-+ len = ntohs(iph->tot_len);
-+ if (skb->len < len || len < 4*iph->ihl)
-+ goto inhdr_error;
-+
-+ if (skb->len > len) {
-+ __pskb_trim(skb, len);
-+ if (skb->ip_summed == CHECKSUM_HW)
-+ skb->ip_summed = CHECKSUM_NONE;
-+ }
-+
-+#ifdef CONFIG_NETFILTER_DEBUG
-+ skb->nf_debug ^= (1 << NF_IP_PRE_ROUTING);
-+#endif
-+ if ((nf_bridge = nf_bridge_alloc(skb)) == NULL)
-+ return NF_DROP;
-+
-+ if (skb->pkt_type == PACKET_OTHERHOST) {
-+ skb->pkt_type = PACKET_HOST;
-+ nf_bridge->mask |= BRNF_PKT_TYPE;
-+ }
-+
-+ nf_bridge->physindev = skb->dev;
-+ skb->dev = bridge_parent(skb->dev);
-+ store_orig_dstaddr(skb);
-+
-+ NF_HOOK(PF_INET, NF_IP_PRE_ROUTING, skb, skb->dev, NULL,
-+ br_nf_pre_routing_finish);
-+
-+ return NF_STOLEN;
-+
-+inhdr_error:
-+// IP_INC_STATS_BH(IpInHdrErrors);
-+out:
-+ return NF_DROP;
-+}
-+
-+
-+/* PF_BRIDGE/LOCAL_IN ************************************************/
-+/* The packet is locally destined, which requires a real
-+ * dst_entry, so detach the fake one. On the way up, the
-+ * packet would pass through PRE_ROUTING again (which already
-+ * took place when the packet entered the bridge), but we
-+ * register an IPv4 PRE_ROUTING 'sabotage' hook that will
-+ * prevent this from happening.
-+ */
-+static unsigned int br_nf_local_in(unsigned int hook, struct sk_buff **pskb,
-+ const struct net_device *in, const struct net_device *out,
-+ int (*okfn)(struct sk_buff *))
-+{
-+ struct sk_buff *skb = *pskb;
-+
-+ if (skb->protocol != __constant_htons(ETH_P_IP))
-+ return NF_ACCEPT;
-+
-+ if (skb->dst == (struct dst_entry *)&__fake_rtable) {
-+ dst_release(skb->dst);
-+ skb->dst = NULL;
-+ }
-+
-+ return NF_ACCEPT;
-+}
-+
-+
-+/* PF_BRIDGE/FORWARD *************************************************/
-+static int br_nf_forward_finish(struct sk_buff *skb)
-+{
-+ struct nf_bridge_info *nf_bridge = skb->nf_bridge;
-+
-+#ifdef CONFIG_NETFILTER_DEBUG
-+ skb->nf_debug ^= (1 << NF_BR_FORWARD);
-+#endif
-+
-+ if (nf_bridge->mask & BRNF_PKT_TYPE) {
-+ skb->pkt_type = PACKET_OTHERHOST;
-+ nf_bridge->mask ^= BRNF_PKT_TYPE;
-+ }
-+
-+ NF_HOOK_THRESH(PF_BRIDGE, NF_BR_FORWARD, skb, nf_bridge->physindev,
-+ skb->dev, br_forward_finish, 1);
-+
-+ return 0;
-+}
-+
-+/* This is the 'purely bridged' case. We pass the packet to
-+ * netfilter with indev and outdev set to the bridge device,
-+ * but we are still able to filter on the 'real' indev/outdev
-+ * because of the ipt_physdev.c module.
-+ */
-+static unsigned int br_nf_forward(unsigned int hook, struct sk_buff **pskb,
-+ const struct net_device *in, const struct net_device *out,
-+ int (*okfn)(struct sk_buff *))
-+{
-+ struct sk_buff *skb = *pskb;
-+ struct nf_bridge_info *nf_bridge;
-+
-+ if (skb->protocol != __constant_htons(ETH_P_IP))
-+ return NF_ACCEPT;
-+
-+#ifdef CONFIG_NETFILTER_DEBUG
-+ skb->nf_debug ^= (1 << NF_BR_FORWARD);
-+#endif
-+
-+ nf_bridge = skb->nf_bridge;
-+ if (skb->pkt_type == PACKET_OTHERHOST) {
-+ skb->pkt_type = PACKET_HOST;
-+ nf_bridge->mask |= BRNF_PKT_TYPE;
-+ }
-+
-+ nf_bridge->mask |= BRNF_BRIDGED; /* The physdev module checks on this */
-+ nf_bridge->physoutdev = skb->dev;
-+
-+ NF_HOOK(PF_INET, NF_IP_FORWARD, skb, bridge_parent(nf_bridge->physindev),
-+ bridge_parent(skb->dev), br_nf_forward_finish);
-+
-+ return NF_STOLEN;
-+}
-+
-+
-+/* PF_BRIDGE/LOCAL_OUT ***********************************************/
-+static int br_nf_local_out_finish(struct sk_buff *skb)
-+{
-+#ifdef CONFIG_NETFILTER_DEBUG
-+ skb->nf_debug &= ~(1 << NF_BR_LOCAL_OUT);
-+#endif
-+
-+ NF_HOOK_THRESH(PF_BRIDGE, NF_BR_LOCAL_OUT, skb, NULL, skb->dev,
-+ br_forward_finish, NF_BR_PRI_FIRST + 1);
-+
-+ return 0;
-+}
-+
-+
-+/* This function sees both locally originated IP packets and forwarded
-+ * IP packets (in both cases the destination device is a bridge
-+ * device). It also sees bridged-and-DNAT'ed packets.
-+ * To be able to filter on the physical bridge devices (with the ipt_physdev.c
-+ * module), we steal packets destined to a bridge device away from the
-+ * PF_INET/FORWARD and PF_INET/OUTPUT hook functions, and give them back later,
-+ * when we have determined the real output device. This is done in here.
-+ *
-+ * If (nf_bridge->mask & BRNF_BRIDGED_DNAT) then the packet is bridged
-+ * and we fake the PF_BRIDGE/FORWARD hook. The function br_nf_forward()
-+ * will then fake the PF_INET/FORWARD hook. br_nf_local_out() has priority
-+ * NF_BR_PRI_FIRST, so no relevant PF_BRIDGE/INPUT functions have been nor
-+ * will be executed.
-+ * Otherwise, if nf_bridge->physindev is NULL, the bridge-nf code never touched
-+ * this packet before, and so the packet was locally originated. We fake
-+ * the PF_INET/LOCAL_OUT hook.
-+ * Finally, if nf_bridge->physindev isn't NULL, then the packet was IP routed,
-+ * so we fake the PF_INET/FORWARD hook. ipv4_sabotage_out() makes sure
-+ * even routed packets that didn't arrive on a bridge interface have their
-+ * nf_bridge->physindev set.
-+ */
-+
-+static unsigned int br_nf_local_out(unsigned int hook, struct sk_buff **pskb,
-+ const struct net_device *in, const struct net_device *out,
-+ int (*_okfn)(struct sk_buff *))
-+{
-+ int (*okfn)(struct sk_buff *skb);
-+ struct net_device *realindev;
-+ struct sk_buff *skb = *pskb;
-+ struct nf_bridge_info *nf_bridge;
-+
-+ if (skb->protocol != __constant_htons(ETH_P_IP))
-+ return NF_ACCEPT;
-+
-+ /* Sometimes we get packets with NULL ->dst here (for example,
-+ * running a dhcp client daemon triggers this).
-+ */
-+ if (skb->dst == NULL)
-+ return NF_ACCEPT;
-+
-+ nf_bridge = skb->nf_bridge;
-+ nf_bridge->physoutdev = skb->dev;
-+
-+ realindev = nf_bridge->physindev;
-+
-+ /* Bridged, take PF_BRIDGE/FORWARD.
-+ * (see big note in front of br_nf_pre_routing_finish)
-+ */
-+ if (nf_bridge->mask & BRNF_BRIDGED_DNAT) {
-+ okfn = br_forward_finish;
-+
-+ if (nf_bridge->mask & BRNF_PKT_TYPE) {
-+ skb->pkt_type = PACKET_OTHERHOST;
-+ nf_bridge->mask ^= BRNF_PKT_TYPE;
-+ }
-+
-+ NF_HOOK(PF_BRIDGE, NF_BR_FORWARD, skb, realindev,
-+ skb->dev, okfn);
-+ } else {
-+ okfn = br_nf_local_out_finish;
-+ /* IP forwarded traffic has a physindev, locally
-+ * generated traffic hasn't.
-+ */
-+ if (realindev != NULL) {
-+ if (((nf_bridge->mask & BRNF_DONT_TAKE_PARENT) == 0) &&
-+ has_bridge_parent(realindev))
-+ realindev = bridge_parent(realindev);
-+
-+ NF_HOOK_THRESH(PF_INET, NF_IP_FORWARD, skb, realindev,
-+ bridge_parent(skb->dev), okfn,
-+ NF_IP_PRI_BRIDGE_SABOTAGE_FORWARD + 1);
-+ } else {
-+#ifdef CONFIG_NETFILTER_DEBUG
-+ skb->nf_debug ^= (1 << NF_IP_LOCAL_OUT);
-+#endif
-+
-+ NF_HOOK_THRESH(PF_INET, NF_IP_LOCAL_OUT, skb, realindev,
-+ bridge_parent(skb->dev), okfn,
-+ NF_IP_PRI_BRIDGE_SABOTAGE_LOCAL_OUT + 1);
-+ }
-+ }
-+
-+ return NF_STOLEN;
-+}
-+
-+
-+/* PF_BRIDGE/POST_ROUTING ********************************************/
-+static unsigned int br_nf_post_routing(unsigned int hook, struct sk_buff **pskb,
-+ const struct net_device *in, const struct net_device *out,
-+ int (*okfn)(struct sk_buff *))
-+{
-+ struct sk_buff *skb = *pskb;
-+ struct nf_bridge_info *nf_bridge = (*pskb)->nf_bridge;
-+
-+ /* Be very paranoid. Must be a device driver bug. */
-+ if (skb->mac.raw < skb->head || skb->mac.raw + ETH_HLEN > skb->data) {
-+ printk(KERN_CRIT "br_netfilter: Argh!! br_nf_post_routing: "
-+ "bad mac.raw pointer.");
-+ if (skb->dev != NULL) {
-+ printk("[%s]", skb->dev->name);
-+ if (has_bridge_parent(skb->dev))
-+ printk("[%s]", bridge_parent(skb->dev)->name);
-+ }
-+ printk("\n");
-+ return NF_ACCEPT;
-+ }
-+
-+ if (skb->protocol != __constant_htons(ETH_P_IP))
-+ return NF_ACCEPT;
-+
-+ /* Sometimes we get packets with NULL ->dst here (for example,
-+ * running a dhcp client daemon triggers this).
-+ */
-+ if (skb->dst == NULL)
-+ return NF_ACCEPT;
-+
-+#ifdef CONFIG_NETFILTER_DEBUG
-+ skb->nf_debug ^= (1 << NF_IP_POST_ROUTING);
-+#endif
-+
-+ /* We assume any code from br_dev_queue_push_xmit onwards doesn't care
-+ * about the value of skb->pkt_type.
-+ */
-+ if (skb->pkt_type == PACKET_OTHERHOST) {
-+ skb->pkt_type = PACKET_HOST;
-+ nf_bridge->mask |= BRNF_PKT_TYPE;
-+ }
-+
-+ memcpy(nf_bridge->hh, skb->data - 16, 16);
-+
-+ NF_HOOK(PF_INET, NF_IP_POST_ROUTING, skb, NULL,
-+ bridge_parent(skb->dev), br_dev_queue_push_xmit);
-+
-+ return NF_STOLEN;
-+}
-+
-+
-+/* IPv4/SABOTAGE *****************************************************/
-+
-+/* Don't hand locally destined packets to PF_INET/PRE_ROUTING
-+ * for the second time.
-+ */
-+static unsigned int ipv4_sabotage_in(unsigned int hook, struct sk_buff **pskb,
-+ const struct net_device *in, const struct net_device *out,
-+ int (*okfn)(struct sk_buff *))
-+{
-+ if (in->hard_start_xmit == br_dev_xmit &&
-+ okfn != br_nf_pre_routing_finish) {
-+ okfn(*pskb);
-+ return NF_STOLEN;
-+ }
-+
-+ return NF_ACCEPT;
-+}
-+
-+/* Postpone execution of PF_INET/FORWARD, PF_INET/LOCAL_OUT
-+ * and PF_INET/POST_ROUTING until we have done the forwarding
-+ * decision in the bridge code and have determined skb->physoutdev.
-+ */
-+static unsigned int ipv4_sabotage_out(unsigned int hook, struct sk_buff **pskb,
-+ const struct net_device *in, const struct net_device *out,
-+ int (*okfn)(struct sk_buff *))
-+{
-+ if (out->hard_start_xmit == br_dev_xmit &&
-+ okfn != br_nf_forward_finish &&
-+ okfn != br_nf_local_out_finish &&
-+ okfn != br_dev_queue_push_xmit) {
-+ struct sk_buff *skb = *pskb;
-+ struct nf_bridge_info *nf_bridge;
-+
-+ if (!skb->nf_bridge && !nf_bridge_alloc(skb))
-+ return NF_DROP;
-+
-+ nf_bridge = skb->nf_bridge;
-+
-+ /* This frame will arrive on PF_BRIDGE/LOCAL_OUT and we
-+ * will need the indev then. For a brouter, the real indev
-+ * can be a bridge port, so we make sure br_nf_local_out()
-+ * doesn't use the bridge parent of the indev by using
-+ * the BRNF_DONT_TAKE_PARENT mask.
-+ */
-+ if (hook == NF_IP_FORWARD && nf_bridge->physindev == NULL) {
-+ nf_bridge->mask &= BRNF_DONT_TAKE_PARENT;
-+ nf_bridge->physindev = (struct net_device *)in;
-+ }
-+ okfn(skb);
-+ return NF_STOLEN;
-+ }
-+
-+ return NF_ACCEPT;
-+}
-+
-+/* For br_nf_local_out we need (prio = NF_BR_PRI_FIRST), to insure that innocent
-+ * PF_BRIDGE/NF_BR_LOCAL_OUT functions don't get bridged traffic as input.
-+ * For br_nf_post_routing, we need (prio = NF_BR_PRI_LAST), because
-+ * ip_refrag() can return NF_STOLEN.
-+ */
-+static struct nf_hook_ops br_nf_ops[] = {
-+ { .hook = br_nf_pre_routing,
-+ .pf = PF_BRIDGE,
-+ .hooknum = NF_BR_PRE_ROUTING,
-+ .priority = NF_BR_PRI_BRNF, },
-+ { .hook = br_nf_local_in,
-+ .pf = PF_BRIDGE,
-+ .hooknum = NF_BR_LOCAL_IN,
-+ .priority = NF_BR_PRI_BRNF, },
-+ { .hook = br_nf_forward,
-+ .pf = PF_BRIDGE,
-+ .hooknum = NF_BR_FORWARD,
-+ .priority = NF_BR_PRI_BRNF, },
-+ { .hook = br_nf_local_out,
-+ .pf = PF_BRIDGE,
-+ .hooknum = NF_BR_LOCAL_OUT,
-+ .priority = NF_BR_PRI_FIRST, },
-+ { .hook = br_nf_post_routing,
-+ .pf = PF_BRIDGE,
-+ .hooknum = NF_BR_POST_ROUTING,
-+ .priority = NF_BR_PRI_LAST, },
-+ { .hook = ipv4_sabotage_in,
-+ .pf = PF_INET,
-+ .hooknum = NF_IP_PRE_ROUTING,
-+ .priority = NF_IP_PRI_FIRST, },
-+ { .hook = ipv4_sabotage_out,
-+ .pf = PF_INET,
-+ .hooknum = NF_IP_FORWARD,
-+ .priority = NF_IP_PRI_BRIDGE_SABOTAGE_FORWARD, },
-+ { .hook = ipv4_sabotage_out,
-+ .pf = PF_INET,
-+ .hooknum = NF_IP_LOCAL_OUT,
-+ .priority = NF_IP_PRI_BRIDGE_SABOTAGE_LOCAL_OUT, },
-+ { .hook = ipv4_sabotage_out,
-+ .pf = PF_INET,
-+ .hooknum = NF_IP_POST_ROUTING,
-+ .priority = NF_IP_PRI_FIRST, },
-+};
-+
-+int br_netfilter_init(void)
-+{
-+ int i;
-+
-+ for (i = 0; i < ARRAY_SIZE(br_nf_ops); i++) {
-+ int ret;
-+
-+ if ((ret = nf_register_hook(&br_nf_ops[i])) >= 0)
-+ continue;
-+
-+ while (i--)
-+ nf_unregister_hook(&br_nf_ops[i]);
-+
-+ return ret;
-+ }
-+
-+ printk(KERN_NOTICE "Bridge firewalling registered\n");
-+
-+ return 0;
-+}
-+
-+void br_netfilter_fini(void)
-+{
-+ int i;
-+
-+ for (i = ARRAY_SIZE(br_nf_ops) - 1; i >= 0; i--)
-+ nf_unregister_hook(&br_nf_ops[i]);
-+}
---- /dev/null Thu Aug 24 11:00:32 2000
-+++ linux-2.4.21-ebt-brnf-3/net/ipv4/netfilter/ipt_physdev.c Fri Aug 8 01:09:06 2003
-@@ -0,0 +1,127 @@
-+/* Kernel module to match the bridge port in and
-+ * out device for IP packets coming into contact with a bridge. */
-+#include <linux/module.h>
-+#include <linux/skbuff.h>
-+#include <linux/netfilter_ipv4/ipt_physdev.h>
-+#include <linux/netfilter_ipv4/ip_tables.h>
-+#include <linux/netfilter_bridge.h>
-+#include <linux/netdevice.h>
-+#define MATCH 1
-+#define NOMATCH 0
-+
-+static int
-+match(const struct sk_buff *skb,
-+ const struct net_device *in,
-+ const struct net_device *out,
-+ const void *matchinfo,
-+ int offset,
-+ const void *hdr,
-+ u_int16_t datalen,
-+ int *hotdrop)
-+{
-+ int i;
-+ static const char nulldevname[IFNAMSIZ] = { 0 };
-+ const struct ipt_physdev_info *info = matchinfo;
-+ unsigned long ret;
-+ const char *indev, *outdev;
-+ struct nf_bridge_info *nf_bridge;
-+
-+ /* Not a bridged IP packet or no info available yet:
-+ * LOCAL_OUT/mangle and LOCAL_OUT/nat don't know if
-+ * the destination device will be a bridge. */
-+ if (!(nf_bridge = skb->nf_bridge)) {
-+ /* Return MATCH if the invert flags of the used options are on */
-+ if ((info->bitmask & IPT_PHYSDEV_OP_BRIDGED) &&
-+ !(info->invert & IPT_PHYSDEV_OP_BRIDGED))
-+ return NOMATCH;
-+ if ((info->bitmask & IPT_PHYSDEV_OP_ISIN) &&
-+ !(info->invert & IPT_PHYSDEV_OP_ISIN))
-+ return NOMATCH;
-+ if ((info->bitmask & IPT_PHYSDEV_OP_ISOUT) &&
-+ !(info->invert & IPT_PHYSDEV_OP_ISOUT))
-+ return NOMATCH;
-+ if ((info->bitmask & IPT_PHYSDEV_OP_IN) &&
-+ !(info->invert & IPT_PHYSDEV_OP_IN))
-+ return NOMATCH;
-+ if ((info->bitmask & IPT_PHYSDEV_OP_OUT) &&
-+ !(info->invert & IPT_PHYSDEV_OP_OUT))
-+ return NOMATCH;
-+ return MATCH;
-+ }
-+
-+ /* This only makes sense in the FORWARD and POSTROUTING chains */
-+ if ((info->bitmask & IPT_PHYSDEV_OP_BRIDGED) &&
-+ (!!(nf_bridge->mask & BRNF_BRIDGED) ^
-+ !(info->invert & IPT_PHYSDEV_OP_BRIDGED)))
-+ return NOMATCH;
-+
-+ if ((info->bitmask & IPT_PHYSDEV_OP_ISIN &&
-+ (!nf_bridge->physindev ^ !!(info->invert & IPT_PHYSDEV_OP_ISIN))) ||
-+ (info->bitmask & IPT_PHYSDEV_OP_ISOUT &&
-+ (!nf_bridge->physoutdev ^ !!(info->invert & IPT_PHYSDEV_OP_ISOUT))))
-+ return NOMATCH;
-+
-+ if (!(info->bitmask & IPT_PHYSDEV_OP_IN))
-+ goto match_outdev;
-+ indev = nf_bridge->physindev ? nf_bridge->physindev->name : nulldevname;
-+ for (i = 0, ret = 0; i < IFNAMSIZ/sizeof(unsigned long); i++) {
-+ ret |= (((const unsigned long *)indev)[i]
-+ ^ ((const unsigned long *)info->physindev)[i])
-+ & ((const unsigned long *)info->in_mask)[i];
-+ }
-+
-+ if ((ret == 0) ^ !(info->invert & IPT_PHYSDEV_OP_IN))
-+ return NOMATCH;
-+
-+match_outdev:
-+ if (!(info->bitmask & IPT_PHYSDEV_OP_OUT))
-+ return MATCH;
-+ outdev = nf_bridge->physoutdev ?
-+ nf_bridge->physoutdev->name : nulldevname;
-+ for (i = 0, ret = 0; i < IFNAMSIZ/sizeof(unsigned long); i++) {
-+ ret |= (((const unsigned long *)outdev)[i]
-+ ^ ((const unsigned long *)info->physoutdev)[i])
-+ & ((const unsigned long *)info->out_mask)[i];
-+ }
-+
-+ return (ret != 0) ^ !(info->invert & IPT_PHYSDEV_OP_OUT);
-+}
-+
-+static int
-+checkentry(const char *tablename,
-+ const struct ipt_ip *ip,
-+ void *matchinfo,
-+ unsigned int matchsize,
-+ unsigned int hook_mask)
-+{
-+ const struct ipt_physdev_info *info = matchinfo;
-+
-+ if (matchsize != IPT_ALIGN(sizeof(struct ipt_physdev_info)))
-+ return 0;
-+ if (!(info->bitmask & IPT_PHYSDEV_OP_MASK) ||
-+ info->bitmask & ~IPT_PHYSDEV_OP_MASK)
-+ return 0;
-+ return 1;
-+}
-+
-+static struct ipt_match physdev_match = {
-+ .name = "physdev",
-+ .match = &match,
-+ .checkentry = &checkentry,
-+ .me = THIS_MODULE,
-+};
-+
-+static int __init init(void)
-+{
-+ return ipt_register_match(&physdev_match);
-+}
-+
-+static void __exit fini(void)
-+{
-+ ipt_unregister_match(&physdev_match);
-+}
-+
-+module_init(init);
-+module_exit(fini);
-+MODULE_LICENSE("GPL");
-+EXPORT_NO_SYMBOLS;
---- /dev/null Thu Aug 24 11:00:32 2000
-+++ linux-2.4.21-ebt-brnf-3/include/linux/netfilter_ipv4/ipt_physdev.h Fri Aug 8 01:09:06 2003
-@@ -0,0 +1,24 @@
-+#ifndef _IPT_PHYSDEV_H
-+#define _IPT_PHYSDEV_H
-+
-+#ifdef __KERNEL__
-+#include <linux/if.h>
-+#endif
-+
-+#define IPT_PHYSDEV_OP_IN 0x01
-+#define IPT_PHYSDEV_OP_OUT 0x02
-+#define IPT_PHYSDEV_OP_BRIDGED 0x04
-+#define IPT_PHYSDEV_OP_ISIN 0x08
-+#define IPT_PHYSDEV_OP_ISOUT 0x10
-+#define IPT_PHYSDEV_OP_MASK (0x20 - 1)
-+
-+struct ipt_physdev_info {
-+ u_int8_t invert;
-+ u_int8_t bitmask;
-+ char physindev[IFNAMSIZ];
-+ char in_mask[IFNAMSIZ];
-+ char physoutdev[IFNAMSIZ];
-+ char out_mask[IFNAMSIZ];
-+};
-+
-+#endif /*_IPT_PHYSDEV_H*/
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