diff options
Diffstat (limited to 'package/linux/kernel-patches/302-ebtables')
| -rw-r--r-- | package/linux/kernel-patches/302-ebtables | 7012 |
1 files changed, 0 insertions, 7012 deletions
diff --git a/package/linux/kernel-patches/302-ebtables b/package/linux/kernel-patches/302-ebtables deleted file mode 100644 index b1c34abe4d..0000000000 --- a/package/linux/kernel-patches/302-ebtables +++ /dev/null @@ -1,7012 +0,0 @@ ---- linux-2.4.29/net/bridge/br_private.h 2004-08-08 01:26:06.000000000 +0200 -+++ linux-2.4.29-ebt-brnf/net/bridge/br_private.h 2005-03-14 21:24:04.000000000 +0100 -@@ -143,8 +143,10 @@ 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); -@@ -165,7 +167,8 @@ 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 int br_ioctl(struct net_bridge *br, -@@ -175,6 +178,10 @@ extern int br_ioctl(struct net_bridge *b - 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); - extern struct net_bridge_port *br_get_port(struct net_bridge *br, ---- linux-2.4.29/include/linux/if_bridge.h 2001-11-22 20:47:12.000000000 +0100 -+++ linux-2.4.29-ebt-brnf/include/linux/if_bridge.h 2005-03-14 21:11:28.000000000 +0100 -@@ -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-2.4.29/net/core/dev.c 2004-04-14 15:05:41.000000000 +0200 -+++ linux-2.4.29-ebt-brnf/net/core/dev.c 2005-03-14 00:00:29.000000000 +0100 -@@ -1426,7 +1426,7 @@ 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, -@@ -1443,7 +1443,6 @@ static __inline__ int handle_bridge(stru - } - } - -- br_handle_frame_hook(skb); - return ret; - } - -@@ -1503,7 +1502,12 @@ int netif_receive_skb(struct sk_buff *sk - #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) - if (skb->dev->br_port != NULL && br_handle_frame_hook != NULL && - skb->pkt_type != PACKET_LOOPBACK) { -- return handle_bridge(skb, pt_prev); -+ int ret; -+ -+ ret = handle_bridge(skb, pt_prev); -+ if (br_handle_frame_hook(skb) == 0) -+ return ret; -+ pt_prev = NULL; - } - #endif - ---- linux-2.4.29/net/bridge/br_input.c 2003-08-25 13:44:44.000000000 +0200 -+++ linux-2.4.29-ebt-brnf/net/bridge/br_input.c 2005-03-14 00:00:29.000000000 +0100 -@@ -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; -@@ -146,26 +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]) { - NF_HOOK(PF_BRIDGE, NF_BR_LOCAL_IN, skb, skb->dev,NULL, - br_stp_handle_bpdu); - read_unlock(&br->lock); -- return; -+ return 0; - } - - read_unlock(&br->lock); - kfree_skb(skb); -+ return 0; - } ---- linux-2.4.29/net/bridge/br_forward.c 2003-11-28 19:26:21.000000000 +0100 -+++ linux-2.4.29-ebt-brnf/net/bridge/br_forward.c 2005-03-14 00:00:29.000000000 +0100 -@@ -30,18 +30,21 @@ 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 -+ nf_bridge_maybe_copy_header(skb); -+#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 +52,11 @@ 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) -@@ -62,7 +68,7 @@ static void __br_forward(struct net_brid - skb->ip_summed = CHECKSUM_NONE; - - NF_HOOK(PF_BRIDGE, NF_BR_FORWARD, skb, indev, skb->dev, -- __br_forward_finish); -+ br_forward_finish); - } - - /* called under bridge lock */ ---- linux-2.4.29/net/bridge/br.c 2004-08-08 01:26:06.000000000 +0200 -+++ linux-2.4.29-ebt-brnf/net/bridge/br.c 2005-03-14 00:00:29.000000000 +0100 -@@ -30,6 +30,8 @@ - #include "../atm/lec.h" - #endif - -+int (*br_should_route_hook) (struct sk_buff **pskb) = NULL; -+ - void br_dec_use_count() - { - MOD_DEC_USE_COUNT; -@@ -44,6 +46,10 @@ 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) -@@ -57,6 +63,9 @@ static int __init br_init(void) - - static void __exit br_deinit(void) - { -+#ifdef CONFIG_NETFILTER -+ br_netfilter_fini(); -+#endif - unregister_netdevice_notifier(&br_device_notifier); - - rtnl_lock(); -@@ -73,7 +82,7 @@ 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-2.4.29/net/bridge/Makefile 2000-12-29 23:07:24.000000000 +0100 -+++ linux-2.4.29-ebt-brnf/net/bridge/Makefile 2005-03-14 00:00:29.000000000 +0100 -@@ -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-2.4.29/include/linux/netfilter_bridge.h 2001-06-12 04:15:27.000000000 +0200 -+++ linux-2.4.29-ebt-brnf/include/linux/netfilter_bridge.h 2005-03-14 21:24:06.000000000 +0100 -@@ -6,6 +6,10 @@ - - #include <linux/config.h> - #include <linux/netfilter.h> -+#if defined(__KERNEL__) && defined(CONFIG_NETFILTER) -+#include <asm/atomic.h> -+#include <linux/if_ether.h> -+#endif - - /* Bridge Hooks */ - /* After promisc drops, checksum checks. */ -@@ -18,7 +22,76 @@ - #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 -+#define BRNF_NF_BRIDGE_PREROUTING 0x10 -+ -+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; -+#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE) -+ (*nf_bridge)->netoutdev = NULL; -+#endif -+ } -+ -+ return *nf_bridge; -+} -+ -+/* Only used in br_forward.c */ -+static inline -+void nf_bridge_maybe_copy_header(struct sk_buff *skb) -+{ -+ if (skb->nf_bridge) { -+ if (skb->protocol == __constant_htons(ETH_P_8021Q)) { -+ memcpy(skb->data - 18, skb->nf_bridge->data, 18); -+ skb_push(skb, 4); -+ } else -+ memcpy(skb->data - 16, skb->nf_bridge->data, 16); -+ } -+} -+ -+static inline -+void nf_bridge_save_header(struct sk_buff *skb) -+{ -+ int header_size = 16; -+ -+ if (skb->protocol == __constant_htons(ETH_P_8021Q)) -+ header_size = 18; -+ memcpy(skb->nf_bridge->data, skb->data - header_size, header_size); -+} - -+struct bridge_skb_cb { -+ union { -+ __u32 ipv4; -+ } daddr; -+}; -+#endif /* CONFIG_NETFILTER */ - -+#endif /* __KERNEL__ */ - #endif ---- linux-2.4.29/include/linux/netfilter_ipv4/ip_tables.h 2004-08-08 01:26:06.000000000 +0200 -+++ linux-2.4.29-ebt-brnf/include/linux/netfilter_ipv4/ip_tables.h 2005-03-14 21:24:28.000000000 +0100 -@@ -159,7 +159,7 @@ struct ipt_entry - #define IPT_CONTINUE 0xFFFFFFFF - - /* For standard target */ --#define IPT_RETURN (-NF_MAX_VERDICT - 1) -+#define IPT_RETURN (-NF_REPEAT - 1) - - /* TCP matching stuff */ - struct ipt_tcp ---- linux-2.4.29/include/linux/netfilter_ipv6/ip6_tables.h 2004-08-08 01:26:06.000000000 +0200 -+++ linux-2.4.29-ebt-brnf/include/linux/netfilter_ipv6/ip6_tables.h 2005-03-14 00:00:29.000000000 +0100 -@@ -167,7 +167,7 @@ struct ip6t_entry - #define IP6T_CONTINUE 0xFFFFFFFF - - /* For standard target */ --#define IP6T_RETURN (-NF_MAX_VERDICT - 1) -+#define IP6T_RETURN (-NF_REPEAT - 1) - - /* TCP matching stuff */ - struct ip6t_tcp ---- linux-2.4.29/include/linux/netfilter_arp/arp_tables.h 2003-08-25 13:44:44.000000000 +0200 -+++ linux-2.4.29-ebt-brnf/include/linux/netfilter_arp/arp_tables.h 2005-03-14 21:24:31.000000000 +0100 -@@ -154,7 +154,7 @@ struct arpt_entry - #define ARPT_CONTINUE 0xFFFFFFFF - - /* For standard target */ --#define ARPT_RETURN (-NF_MAX_VERDICT - 1) -+#define ARPT_RETURN (-NF_REPEAT - 1) - - /* The argument to ARPT_SO_GET_INFO */ - struct arpt_getinfo ---- linux-2.4.29/net/Makefile 2004-08-08 01:26:06.000000000 +0200 -+++ linux-2.4.29-ebt-brnf/net/Makefile 2005-03-14 00:00:29.000000000 +0100 -@@ -7,7 +7,8 @@ - - O_TARGET := network.o - --mod-subdirs := ipv4/netfilter ipv6/netfilter ipx irda bluetooth atm netlink sched core sctp 802 -+mod-subdirs := ipv4/netfilter ipv6/netfilter bridge/netfilter ipx irda \ -+ bluetooth atm netlink sched core sctp 802 - export-objs := netsyms.o - - subdir-y := core ethernet -@@ -27,6 +28,12 @@ subdir-$(CONFIG_NETFILTER) += ipv6/netfi - endif - endif - -+ifneq ($(CONFIG_BRIDGE),n) -+ifneq ($(CONFIG_BRIDGE),) -+subdir-$(CONFIG_BRIDGE) += bridge/netfilter -+endif -+endif -+ - subdir-$(CONFIG_KHTTPD) += khttpd - subdir-$(CONFIG_PACKET) += packet - subdir-$(CONFIG_NET_SCHED) += sched ---- linux-2.4.29/net/Config.in 2005-01-19 15:10:13.000000000 +0100 -+++ linux-2.4.29-ebt-brnf/net/Config.in 2005-03-14 00:00:29.000000000 +0100 -@@ -70,6 +70,9 @@ 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 2005-03-14 20:10:29.001600248 +0100 -+++ linux-2.4.29-ebt-brnf/net/bridge/netfilter/Makefile 2005-03-14 00:00:29.000000000 +0100 -@@ -0,0 +1,34 @@ -+# -+# 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-$(CONFIG_BRIDGE_EBT_802_3) += ebt_802_3.o -+obj-$(CONFIG_BRIDGE_EBT_ARPF) += ebt_arp.o -+obj-$(CONFIG_BRIDGE_EBT_AMONG) += ebt_among.o -+obj-$(CONFIG_BRIDGE_EBT_IPF) += ebt_ip.o -+obj-$(CONFIG_BRIDGE_EBT_LIMIT) += ebt_limit.o -+obj-$(CONFIG_BRIDGE_EBT_MARKF) += ebt_mark_m.o -+obj-$(CONFIG_BRIDGE_EBT_PKTTYPE) += ebt_pkttype.o -+obj-$(CONFIG_BRIDGE_EBT_STP) += ebt_stp.o -+obj-$(CONFIG_BRIDGE_EBT_VLANF) += ebt_vlan.o -+obj-$(CONFIG_BRIDGE_EBT_LOG) += ebt_log.o -+obj-$(CONFIG_BRIDGE_EBT_LOG) += ebt_ulog.o -+obj-$(CONFIG_BRIDGE_EBT_ARPREPLY) += ebt_arpreply.o -+obj-$(CONFIG_BRIDGE_EBT_DNAT) += ebt_dnat.o -+obj-$(CONFIG_BRIDGE_EBT_MARK_T) += ebt_mark.o -+obj-$(CONFIG_BRIDGE_EBT_REDIRECT) += ebt_redirect.o -+obj-$(CONFIG_BRIDGE_EBT_SNAT) += ebt_snat.o -+include $(TOPDIR)/Rules.make ---- /dev/null 2005-03-14 20:10:29.001600248 +0100 -+++ linux-2.4.29-ebt-brnf/net/bridge/netfilter/Config.in 2005-03-14 00:00:29.000000000 +0100 -@@ -0,0 +1,23 @@ -+# -+# 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: ulog 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: among filter support' CONFIG_BRIDGE_EBT_AMONG $CONFIG_BRIDGE_NF_EBTABLES -+dep_tristate ' ebt: limit filter support' CONFIG_BRIDGE_EBT_LIMIT $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: arp reply target support' CONFIG_BRIDGE_EBT_ARPREPLY $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 2005-03-14 20:10:29.001600248 +0100 -+++ linux-2.4.29-ebt-brnf/net/bridge/netfilter/ebtable_filter.c 2005-03-14 00:00:29.000000000 +0100 -@@ -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 2005-03-14 20:10:29.001600248 +0100 -+++ linux-2.4.29-ebt-brnf/net/bridge/netfilter/ebtable_nat.c 2005-03-14 00:00:29.000000000 +0100 -@@ -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 2005-03-14 20:10:29.001600248 +0100 -+++ linux-2.4.29-ebt-brnf/net/bridge/netfilter/ebtable_broute.c 2005-03-14 00:00:29.000000000 +0100 -@@ -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 2005-03-14 20:10:29.001600248 +0100 -+++ linux-2.4.29-ebt-brnf/net/bridge/netfilter/ebt_among.c 2005-03-14 00:00:29.000000000 +0100 -@@ -0,0 +1,223 @@ -+/* -+ * ebt_among -+ * -+ * Authors: -+ * Grzegorz Borowiak <grzes@gnu.univ.gda.pl> -+ * -+ * August, 2003 -+ * -+ */ -+ -+#include <linux/netfilter_bridge/ebtables.h> -+#include <linux/netfilter_bridge/ebt_among.h> -+#include <linux/ip.h> -+#include <linux/if_arp.h> -+#include <linux/module.h> -+ -+static int ebt_mac_wormhash_contains(const struct ebt_mac_wormhash *wh, -+ const char *mac, uint32_t ip) -+{ -+ /* You may be puzzled as to how this code works. -+ * Some tricks were used, refer to -+ * include/linux/netfilter_bridge/ebt_among.h -+ * as there you can find a solution of this mystery. -+ */ -+ const struct ebt_mac_wormhash_tuple *p; -+ int start, limit, i; -+ uint32_t cmp[2] = { 0, 0 }; -+ int key = (const unsigned char) mac[5]; -+ -+ memcpy(((char *) cmp) + 2, mac, 6); -+ start = wh->table[key]; -+ limit = wh->table[key + 1]; -+ if (ip) { -+ for (i = start; i < limit; i++) { -+ p = &wh->pool[i]; -+ if (cmp[1] == p->cmp[1] && cmp[0] == p->cmp[0]) { -+ if (p->ip == 0 || p->ip == ip) { -+ return 1; -+ } -+ } -+ } -+ } else { -+ for (i = start; i < limit; i++) { -+ p = &wh->pool[i]; -+ if (cmp[1] == p->cmp[1] && cmp[0] == p->cmp[0]) { -+ if (p->ip == 0) { -+ return 1; -+ } -+ } -+ } -+ } -+ return 0; -+} -+ -+static int ebt_mac_wormhash_check_integrity(const struct ebt_mac_wormhash -+ *wh) -+{ -+ int i; -+ -+ for (i = 0; i < 256; i++) { -+ if (wh->table[i] > wh->table[i + 1]) -+ return -0x100 - i; -+ if (wh->table[i] < 0) -+ return -0x200 - i; -+ if (wh->table[i] > wh->poolsize) -+ return -0x300 - i; -+ } -+ if (wh->table[256] > wh->poolsize) -+ return -0xc00; -+ return 0; -+} -+ -+static int get_ip_dst(const struct sk_buff *skb, uint32_t * addr) -+{ -+ if (skb->mac.ethernet->h_proto == __constant_htons(ETH_P_IP)) -+ *addr = skb->nh.iph->daddr; -+ else if (skb->mac.ethernet->h_proto == __constant_htons(ETH_P_ARP)) { -+ uint32_t arp_len = sizeof(struct arphdr) + -+ (2 * (((*skb).nh.arph)->ar_hln)) + -+ (2 * (((*skb).nh.arph)->ar_pln)); -+ -+ /* Make sure the packet is long enough. */ -+ if ((((*skb).nh.raw) + arp_len) > (*skb).tail) -+ return -1; -+ /* IPv4 addresses are always 4 bytes. */ -+ if (((*skb).nh.arph)->ar_pln != sizeof(uint32_t)) -+ return -1; -+ -+ memcpy(addr, ((*skb).nh.raw) + sizeof(struct arphdr) + -+ (2 * (((*skb).nh.arph)->ar_hln)) + -+ (((*skb).nh.arph)->ar_pln), sizeof(uint32_t)); -+ -+ } -+ return 0; -+} -+ -+static int get_ip_src(const struct sk_buff *skb, uint32_t * addr) -+{ -+ if (skb->mac.ethernet->h_proto == __constant_htons(ETH_P_IP)) -+ *addr = skb->nh.iph->saddr; -+ else if (skb->mac.ethernet->h_proto == __constant_htons(ETH_P_ARP)) { -+ uint32_t arp_len = sizeof(struct arphdr) + -+ (2 * (((*skb).nh.arph)->ar_hln)) + -+ (2 * (((*skb).nh.arph)->ar_pln)); -+ -+ /* Make sure the packet is long enough. */ -+ if ((((*skb).nh.raw) + arp_len) > (*skb).tail) -+ return -1; -+ /* IPv4 addresses are always 4 bytes. */ -+ if (((*skb).nh.arph)->ar_pln != sizeof(uint32_t)) -+ return -1; -+ -+ memcpy(addr, ((*skb).nh.raw) + sizeof(struct arphdr) + -+ ((((*skb).nh.arph)->ar_hln)), sizeof(uint32_t)); -+ -+ } -+ return 0; -+} -+ -+static int ebt_filter_among(const struct sk_buff *skb, -+ const struct net_device *in, -+ const struct net_device *out, const void *data, -+ unsigned int datalen) -+{ -+ struct ebt_among_info *info = (struct ebt_among_info *) data; -+ const char *dmac, *smac; -+ const struct ebt_mac_wormhash *wh_dst, *wh_src; -+ uint32_t dip = 0, sip = 0; -+ -+ wh_dst = ebt_among_wh_dst(info); -+ wh_src = ebt_among_wh_src(info); -+ -+ if (wh_src) { -+ smac = skb->mac.ethernet->h_source; -+ if (get_ip_src(skb, &sip)) -+ return EBT_NOMATCH; -+ if (!(info->bitmask & EBT_AMONG_SRC_NEG)) { -+ /* we match only if it contains */ -+ if (!ebt_mac_wormhash_contains(wh_src, smac, sip)) -+ return EBT_NOMATCH; -+ } else { -+ /* we match only if it DOES NOT contain */ -+ if (ebt_mac_wormhash_contains(wh_src, smac, sip)) -+ return EBT_NOMATCH; -+ } -+ } -+ -+ if (wh_dst) { -+ dmac = skb->mac.ethernet->h_dest; -+ if (get_ip_dst(skb, &dip)) -+ return EBT_NOMATCH; -+ if (!(info->bitmask & EBT_AMONG_DST_NEG)) { -+ /* we match only if it contains */ -+ if (!ebt_mac_wormhash_contains(wh_dst, dmac, dip)) -+ return EBT_NOMATCH; -+ } else { -+ /* we match only if it DOES NOT contain */ -+ if (ebt_mac_wormhash_contains(wh_dst, dmac, dip)) -+ return EBT_NOMATCH; -+ } -+ } -+ -+ return EBT_MATCH; -+} -+ -+static int ebt_among_check(const char *tablename, unsigned int hookmask, -+ const struct ebt_entry *e, void *data, -+ unsigned int datalen) -+{ -+ struct ebt_among_info *info = (struct ebt_among_info *) data; -+ int expected_length = sizeof(struct ebt_among_info); -+ const struct ebt_mac_wormhash *wh_dst, *wh_src; -+ int err; -+ -+ wh_dst = ebt_among_wh_dst(info); -+ wh_src = ebt_among_wh_src(info); -+ expected_length += ebt_mac_wormhash_size(wh_dst); -+ expected_length += ebt_mac_wormhash_size(wh_src); -+ -+ if (datalen != EBT_ALIGN(expected_length)) { -+ printk(KERN_WARNING -+ "ebtables: among: wrong size: %d" -+ "against expected %d, rounded to %d\n", -+ datalen, expected_length, -+ EBT_ALIGN(expected_length)); -+ return -EINVAL; -+ } -+ if (wh_dst && (err = ebt_mac_wormhash_check_integrity(wh_dst))) { -+ printk(KERN_WARNING -+ "ebtables: among: dst integrity fail: %x\n", -err); -+ return -EINVAL; -+ } -+ if (wh_src && (err = ebt_mac_wormhash_check_integrity(wh_src))) { -+ printk(KERN_WARNING -+ "ebtables: among: src integrity fail: %x\n", -err); -+ return -EINVAL; -+ } -+ return 0; -+} -+ -+static struct ebt_match filter_among = { -+ {NULL, NULL}, -+ EBT_AMONG_MATCH, -+ ebt_filter_among, -+ ebt_among_check, -+ NULL, -+ THIS_MODULE -+}; -+ -+static int __init init(void) -+{ -+ return ebt_register_match(&filter_among); -+} -+ -+static void __exit fini(void) -+{ -+ ebt_unregister_match(&filter_among); -+} -+ -+module_init(init); -+module_exit(fini); -+EXPORT_NO_SYMBOLS; -+MODULE_LICENSE("GPL"); ---- /dev/null 2005-03-14 20:10:29.001600248 +0100 -+++ linux-2.4.29-ebt-brnf/net/bridge/netfilter/ebt_limit.c 2005-03-14 00:00:29.000000000 +0100 -@@ -0,0 +1,101 @@ -+/* -+ * ebt_limit -+ * -+ * Authors: -+ * Tom Marshall <tommy@home.tig-grr.com> -+ * -+ * Mostly copied from netfilter's ipt_limit.c, see that file for explanation -+ * -+ * September, 2003 -+ * -+ */ -+ -+#include <linux/netfilter_bridge/ebtables.h> -+#include <linux/netfilter_bridge/ebt_limit.h> -+#include <linux/module.h> -+ -+#include <linux/netdevice.h> -+#include <linux/spinlock.h> -+ -+static spinlock_t limit_lock = SPIN_LOCK_UNLOCKED; -+ -+#define CREDITS_PER_JIFFY 128 -+ -+static int ebt_limit_match(const struct sk_buff *skb, const struct net_device *in, -+ const struct net_device *out, const void *data, unsigned int datalen) -+{ -+ struct ebt_limit_info *info = (struct ebt_limit_info *)data; -+ unsigned long now = jiffies; -+ -+ spin_lock_bh(&limit_lock); -+ info->credit += (now - xchg(&info->prev, now)) * CREDITS_PER_JIFFY; -+ if (info->credit > info->credit_cap) -+ info->credit = info->credit_cap; -+ -+ if (info->credit >= info->cost) { -+ /* We're not limited. */ -+ info->credit -= info->cost; -+ spin_unlock_bh(&limit_lock); -+ return EBT_MATCH; -+ } -+ -+ spin_unlock_bh(&limit_lock); -+ return EBT_NOMATCH; -+} -+ -+/* Precision saver. */ -+static u_int32_t -+user2credits(u_int32_t user) -+{ -+ /* If multiplying would overflow... */ -+ if (user > 0xFFFFFFFF / (HZ*CREDITS_PER_JIFFY)) -+ /* Divide first. */ -+ return (user / EBT_LIMIT_SCALE) * HZ * CREDITS_PER_JIFFY; -+ -+ return (user * HZ * CREDITS_PER_JIFFY) / EBT_LIMIT_SCALE; -+} -+ -+static int ebt_limit_check(const char *tablename, unsigned int hookmask, -+ const struct ebt_entry *e, void *data, unsigned int datalen) -+{ -+ struct ebt_limit_info *info = (struct ebt_limit_info *)data; -+ -+ if (datalen != EBT_ALIGN(sizeof(struct ebt_limit_info))) -+ return -EINVAL; -+ -+ /* Check for overflow. */ -+ if (info->burst == 0 -+ || user2credits(info->avg * info->burst) < user2credits(info->avg)) { -+ printk("Overflow in ebt_limit: %u/%u\n", -+ info->avg, info->burst); -+ return -EINVAL; -+ } -+ -+ /* User avg in seconds * EBT_LIMIT_SCALE: convert to jiffies * 128. */ -+ info->prev = jiffies; -+ info->credit = user2credits(info->avg * info->burst); -+ info->credit_cap = user2credits(info->avg * info->burst); -+ info->cost = user2credits(info->avg); -+ return 0; -+} -+ -+static struct ebt_match ebt_limit_reg = -+{ -+ {NULL, NULL}, EBT_LIMIT_MATCH, ebt_limit_match, ebt_limit_check, NULL, -+ THIS_MODULE -+}; -+ -+static int __init init(void) -+{ -+ return ebt_register_match(&ebt_limit_reg); -+} -+ -+static void __exit fini(void) -+{ -+ ebt_unregister_match(&ebt_limit_reg); -+} -+ -+module_init(init); -+module_exit(fini); -+EXPORT_NO_SYMBOLS; -+MODULE_LICENSE("GPL"); ---- /dev/null 2005-03-14 20:10:29.001600248 +0100 -+++ linux-2.4.29-ebt-brnf/net/bridge/netfilter/ebt_arpreply.c 2005-03-14 00:00:30.000000000 +0100 -@@ -0,0 +1,86 @@ -+/* -+ * ebt_arpreply -+ * -+ * Authors: -+ * Grzegorz Borowiak <grzes@gnu.univ.gda.pl> -+ * Bart De Schuymer <bdschuym@pandora.be> -+ * -+ * August, 2003 -+ * -+ */ -+ -+#include <linux/netfilter_bridge/ebtables.h> -+#include <linux/netfilter_bridge/ebt_arpreply.h> -+#include <linux/if_arp.h> -+#include <net/arp.h> -+#include <linux/module.h> -+ -+static int ebt_target_reply(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_arpreply_info *info = (struct ebt_arpreply_info *)data; -+ struct arphdr *ah; -+ unsigned char *sha, *arp_ptr; -+ u32 sip, tip; -+ -+ ah = (**pskb).nh.arph; -+ if (ah->ar_op != __constant_htons(ARPOP_REQUEST) || -+ ah->ar_hln != ETH_ALEN || ah->ar_pro != htons(ETH_P_IP) || -+ ah->ar_pln != 4) -+ return EBT_CONTINUE; -+ -+ arp_ptr = (unsigned char *)(ah + 1); -+ -+ /* get source and target IP */ -+ sha = arp_ptr; -+ arp_ptr += ETH_ALEN; -+ memcpy(&sip, arp_ptr, 4); -+ arp_ptr += 4 + ETH_ALEN; -+ memcpy(&tip, arp_ptr, 4); -+ -+ arp_send(ARPOP_REPLY, ETH_P_ARP, sip, in, tip, sha, info->mac, sha); -+ -+ return info->target; -+} -+ -+static int ebt_target_reply_check(const char *tablename, unsigned int hookmask, -+ const struct ebt_entry *e, void *data, unsigned int datalen) -+{ -+ struct ebt_arpreply_info *info = (struct ebt_arpreply_info *)data; -+ -+ if (datalen != EBT_ALIGN(sizeof(struct ebt_arpreply_info))) -+ return -EINVAL; -+ if (BASE_CHAIN && info->target == EBT_RETURN) -+ return -EINVAL; -+ if (e->ethproto != __constant_htons(ETH_P_ARP) || -+ e->invflags & EBT_IPROTO) -+ return -EINVAL; -+ CLEAR_BASE_CHAIN_BIT; -+ if (strcmp(tablename, "nat") || hookmask & ~(1 << NF_BR_PRE_ROUTING)) -+ return -EINVAL; -+ return 0; -+} -+ -+static struct ebt_target reply_target = -+{ -+ .name = EBT_ARPREPLY_TARGET, -+ .target = ebt_target_reply, -+ .check = ebt_target_reply_check, -+ .me = THIS_MODULE, -+}; -+ -+static int __init init(void) -+{ -+ return ebt_register_target(&reply_target); -+} -+ -+static void __exit fini(void) -+{ -+ ebt_unregister_target(&reply_target); -+} -+ -+module_init(init); -+module_exit(fini); -+EXPORT_NO_SYMBOLS; -+MODULE_LICENSE("GPL"); ---- /dev/null 2005-03-14 20:10:29.001600248 +0100 -+++ linux-2.4.29-ebt-brnf/net/bridge/netfilter/ebt_802_3.c 2005-03-14 00:00:30.000000000 +0100 -@@ -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 2005-03-14 20:10:29.001600248 +0100 -+++ linux-2.4.29-ebt-brnf/net/bridge/netfilter/ebt_mark.c 2005-03-14 00:00:30.000000000 +0100 -@@ -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 2005-03-14 20:10:29.001600248 +0100 -+++ linux-2.4.29-ebt-brnf/net/bridge/netfilter/ebt_mark_m.c 2005-03-14 00:00:30.000000000 +0100 -@@ -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 2005-03-14 20:10:29.001600248 +0100 -+++ linux-2.4.29-ebt-brnf/net/bridge/netfilter/ebt_pkttype.c 2005-03-14 00:00:30.000000000 +0100 -@@ -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 2005-03-14 20:10:29.001600248 +0100 -+++ linux-2.4.29-ebt-brnf/net/bridge/netfilter/ebt_stp.c 2005-03-14 00:00:30.000000000 +0100 -@@ -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 2005-03-14 20:10:29.001600248 +0100 -+++ linux-2.4.29-ebt-brnf/net/bridge/netfilter/ebt_redirect.c 2005-03-14 00:00:30.000000000 +0100 -@@ -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 2005-03-14 20:10:29.001600248 +0100 -+++ linux-2.4.29-ebt-brnf/net/bridge/netfilter/ebt_arp.c 2005-03-14 00:00:30.000000000 +0100 -@@ -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 2005-03-14 20:10:29.001600248 +0100 -+++ linux-2.4.29-ebt-brnf/net/bridge/netfilter/ebt_ip.c 2005-03-14 00:00:30.000000000 +0100 -@@ -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 2005-03-14 20:10:29.001600248 +0100 -+++ linux-2.4.29-ebt-brnf/net/bridge/netfilter/ebt_vlan.c 2005-03-14 00:00:30.000000000 +0100 -@@ -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 2005-03-14 20:10:29.001600248 +0100 -+++ linux-2.4.29-ebt-brnf/net/bridge/netfilter/ebt_log.c 2005-03-14 00:00:30.000000000 +0100 -@@ -0,0 +1,153 @@ -+/* -+ * 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, unsigned int hooknr, -+ 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 2005-03-14 20:10:29.001600248 +0100 -+++ linux-2.4.29-ebt-brnf/net/bridge/netfilter/ebt_ulog.c 2005-03-14 00:00:30.000000000 +0100 -@@ -0,0 +1,281 @@ -+/* -+ * netfilter module for userspace bridged Ethernet frames logging daemons -+ * -+ * Authors: -+ * Bart De Schuymer <bdschuym@pandora.be> -+ * -+ * November, 2004 -+ * -+ * Based on ipt_ULOG.c, which is -+ * (C) 2000-2002 by Harald Welte <laforge@netfilter.org> -+ * -+ * This module accepts two parameters: -+ * -+ * nlbufsiz: -+ * The parameter specifies how big the buffer for each netlink multicast -+ * group is. e.g. If you say nlbufsiz=8192, up to eight kb of packets will -+ * get accumulated in the kernel until they are sent to userspace. It is -+ * NOT possible to allocate more than 128kB, and it is strongly discouraged, -+ * because atomically allocating 128kB inside the network rx softirq is not -+ * reliable. Please also keep in mind that this buffer size is allocated for -+ * each nlgroup you are using, so the total kernel memory usage increases -+ * by that factor. -+ * -+ * flushtimeout: -+ * Specify, after how many hundredths of a second the queue should be -+ * flushed even if it is not full yet. -+ * -+ */ -+ -+#include <linux/module.h> -+#include <linux/config.h> -+#include <linux/spinlock.h> -+#include <linux/socket.h> -+#include <linux/skbuff.h> -+#include <linux/kernel.h> -+#include <linux/timer.h> -+#include <linux/netlink.h> -+#include <linux/netdevice.h> -+#include <linux/module.h> -+#include <linux/netfilter_bridge/ebtables.h> -+#include <linux/netfilter_bridge/ebt_ulog.h> -+#include <net/sock.h> -+#include "../br_private.h" -+ -+#define PRINTR(format, args...) do { if (net_ratelimit()) \ -+ printk(format , ## args); } while (0) -+ -+static unsigned int nlbufsiz = 4096; -+MODULE_PARM(nlbufsiz, "i"); -+MODULE_PARM_DESC(nlbufsiz, "netlink buffer size (number of bytes) " -+ "(defaults to 4096)"); -+ -+static unsigned int flushtimeout = 10; -+MODULE_PARM(flushtimeout, "i"); -+MODULE_PARM_DESC(flushtimeout, "buffer flush timeout (hundredths of a second) " -+ "(defaults to 10)"); -+ -+typedef struct { -+ unsigned int qlen; /* number of nlmsgs' in the skb */ -+ struct nlmsghdr *lastnlh; /* netlink header of last msg in skb */ -+ struct sk_buff *skb; /* the pre-allocated skb */ -+ struct timer_list timer; /* the timer function */ -+ spinlock_t lock; /* the per-queue lock */ -+} ebt_ulog_buff_t; -+ -+static ebt_ulog_buff_t ulog_buffers[EBT_ULOG_MAXNLGROUPS]; -+static struct sock *ebtlognl; -+ -+/* send one ulog_buff_t to userspace */ -+static void ulog_send(unsigned int nlgroup) -+{ -+ ebt_ulog_buff_t *ub = &ulog_buffers[nlgroup]; -+ -+ if (timer_pending(&ub->timer)) -+ del_timer(&ub->timer); -+ -+ /* last nlmsg needs NLMSG_DONE */ -+ if (ub->qlen > 1) -+ ub->lastnlh->nlmsg_type = NLMSG_DONE; -+ -+ NETLINK_CB(ub->skb).dst_groups = 1 << nlgroup; -+ netlink_broadcast(ebtlognl, ub->skb, 0, 1 << nlgroup, GFP_ATOMIC); -+ -+ ub->qlen = 0; -+ ub->skb = NULL; -+} -+ -+/* timer function to flush queue in flushtimeout time */ -+static void ulog_timer(unsigned long data) -+{ -+ spin_lock_bh(&ulog_buffers[data].lock); -+ if (ulog_buffers[data].skb) -+ ulog_send(data); -+ spin_unlock_bh(&ulog_buffers[data].lock); -+} -+ -+static struct sk_buff *ulog_alloc_skb(unsigned int size) -+{ -+ struct sk_buff *skb; -+ -+ skb = alloc_skb(nlbufsiz, GFP_ATOMIC); -+ if (!skb) { -+ PRINTR(KERN_ERR "ebt_ulog: can't alloc whole buffer " -+ "of size %ub!\n", nlbufsiz); -+ if (size < nlbufsiz) { -+ /* try to allocate only as much as we need for -+ * current packet */ -+ skb = alloc_skb(size, GFP_ATOMIC); -+ if (!skb) -+ PRINTR(KERN_ERR "ebt_ulog: can't even allocate " -+ "buffer of size %ub\n", size); -+ } -+ } -+ -+ return skb; -+} -+ -+static void ebt_ulog(const struct sk_buff *skb, unsigned int hooknr, -+ const struct net_device *in, const struct net_device *out, -+ const void *data, unsigned int datalen) -+{ -+ ebt_ulog_packet_msg_t *pm; -+ size_t size, copy_len; -+ struct nlmsghdr *nlh; -+ struct ebt_ulog_info *loginfo = (struct ebt_ulog_info *)data; -+ unsigned int group = loginfo->nlgroup; -+ ebt_ulog_buff_t *ub = &ulog_buffers[group]; -+ spinlock_t *lock = &ub->lock; -+ -+ if ((loginfo->cprange == 0) || -+ (loginfo->cprange > skb->len + ETH_HLEN)) -+ copy_len = skb->len + ETH_HLEN; -+ else -+ copy_len = loginfo->cprange; -+ -+ size = NLMSG_SPACE(sizeof(*pm) + copy_len); -+ -+ spin_lock_bh(lock); -+ -+ if (!ub->skb) { -+ if (!(ub->skb = ulog_alloc_skb(size))) -+ goto alloc_failure; -+ } else if (size > skb_tailroom(ub->skb)) { -+ ulog_send(group); -+ -+ if (!(ub->skb = ulog_alloc_skb(size))) -+ goto alloc_failure; -+ } -+ -+ nlh = NLMSG_PUT(ub->skb, 0, ub->qlen, 0, -+ size - NLMSG_ALIGN(sizeof(*nlh))); -+ ub->qlen++; -+ -+ pm = NLMSG_DATA(nlh); -+ -+ /* Fill in the ulog data */ -+ do_gettimeofday(&pm->stamp); -+ if (ub->qlen == 1) -+ ub->skb->stamp = pm->stamp; -+ pm->data_len = copy_len; -+ pm->mark = skb->nfmark; -+ pm->hook = hooknr; -+ if (loginfo->prefix != NULL) -+ strcpy(pm->prefix, loginfo->prefix); -+ else -+ *(pm->prefix) = '\0'; -+ -+ if (in) { -+ strcpy(pm->physindev, in->name); -+ strcpy(pm->indev, in->br_port->br->dev.name); -+ } else -+ pm->indev[0] = pm->physindev[0] = '\0'; -+ -+ if (out) { -+ strcpy(pm->physoutdev, out->name); -+ strcpy(pm->outdev, out->br_port->br->dev.name); -+ } else -+ pm->outdev[0] = pm->physoutdev[0] = '\0'; -+ -+ if (skb_copy_bits(skb, -ETH_HLEN, pm->data, copy_len) < 0) -+ BUG(); -+ -+ if (ub->qlen > 1) -+ ub->lastnlh->nlmsg_flags |= NLM_F_MULTI; -+ -+ ub->lastnlh = nlh; -+ -+ if (ub->qlen >= loginfo->qthreshold) -+ ulog_send(group); -+ else if (!timer_pending(&ub->timer)) { -+ ub->timer.expires = jiffies + flushtimeout * HZ / 100; -+ add_timer(&ub->timer); -+ } -+ -+unlock: -+ spin_unlock_bh(lock); -+ -+ return; -+ -+nlmsg_failure: -+ PRINTR(KERN_ERR "ebt_ULOG: error during NLMSG_PUT.\n"); -+ goto unlock; -+alloc_failure: -+ goto unlock; -+} -+ -+static int ebt_ulog_check(const char *tablename, unsigned int hookmask, -+ const struct ebt_entry *e, void *data, unsigned int datalen) -+{ -+ struct ebt_ulog_info *loginfo = (struct ebt_ulog_info *)data; -+ -+ if (datalen != EBT_ALIGN(sizeof(struct ebt_ulog_info)) || -+ loginfo->nlgroup > 31) -+ return -EINVAL; -+ -+ loginfo->prefix[EBT_ULOG_PREFIX_LEN - 1] = '\0'; -+ -+ if (loginfo->qthreshold > EBT_ULOG_MAX_QLEN) -+ loginfo->qthreshold = EBT_ULOG_MAX_QLEN; -+ -+ return 0; -+} -+ -+static struct ebt_watcher ulog = { -+ {NULL, NULL}, EBT_ULOG_WATCHER, ebt_ulog, ebt_ulog_check, NULL, -+ THIS_MODULE -+}; -+ -+static int __init init(void) -+{ -+ int i, ret = 0; -+ -+ if (nlbufsiz >= 128*1024) { -+ printk(KERN_NOTICE "ebt_ulog: Netlink buffer has to be <= 128kB," -+ " please try a smaller nlbufsiz parameter.\n"); -+ return -EINVAL; -+ } -+ -+ /* initialize ulog_buffers */ -+ for (i = 0; i < EBT_ULOG_MAXNLGROUPS; i++) { -+ init_timer(&ulog_buffers[i].timer); -+ ulog_buffers[i].timer.function = ulog_timer; -+ ulog_buffers[i].timer.data = i; -+ ulog_buffers[i].lock = SPIN_LOCK_UNLOCKED; -+ } -+ -+ ebtlognl = netlink_kernel_create(NETLINK_NFLOG, NULL); -+ if (!ebtlognl) -+ ret = -ENOMEM; -+ else if ((ret = ebt_register_watcher(&ulog))) -+ sock_release(ebtlognl->socket); -+ -+ return ret; -+} -+ -+static void __exit fini(void) -+{ -+ ebt_ulog_buff_t *ub; -+ int i; -+ -+ ebt_unregister_watcher(&ulog); -+ for (i = 0; i < EBT_ULOG_MAXNLGROUPS; i++) { -+ ub = &ulog_buffers[i]; -+ if (timer_pending(&ub->timer)) -+ del_timer(&ub->timer); -+ spin_lock_bh(&ub->lock); -+ if (ub->skb) { -+ kfree_skb(ub->skb); -+ ub->skb = NULL; -+ } -+ spin_unlock_bh(&ub->lock); -+ } -+ sock_release(ebtlognl->socket); -+} -+ -+module_init(init); -+module_exit(fini); -+MODULE_LICENSE("GPL"); -+MODULE_AUTHOR("Bart De Schuymer <bdschuym@pandora.be>"); -+MODULE_DESCRIPTION("ebtables userspace logging module for bridged Ethernet" -+ " frames"); ---- /dev/null 2005-03-14 20:10:29.001600248 +0100 -+++ linux-2.4.29-ebt-brnf/net/bridge/netfilter/ebt_snat.c 2005-03-14 00:00:30.000000000 +0100 -@@ -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 2005-03-14 20:10:29.001600248 +0100 -+++ linux-2.4.29-ebt-brnf/net/bridge/netfilter/ebt_dnat.c 2005-03-14 00:00:30.000000000 +0100 -@@ -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 2005-03-14 20:10:29.001600248 +0100 -+++ linux-2.4.29-ebt-brnf/net/bridge/netfilter/ebtables.c 2005-03-14 21:04:05.155913576 +0100 -@@ -0,0 +1,1497 @@ -+/* -+ * 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, unsigned int hooknr, const struct net_device *in, -+ const struct net_device *out) -+{ -+ w->u.watcher->watcher(skb, hooknr, 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) -+{ -+ int i = 0; -+ char *devname = device->name; -+ -+ if (*entry == '\0') -+ return 0; -+ if (!device) -+ return 1; -+ /* 1 is the wildcard token */ -+ while (entry[i] != '\0' && entry[i] != 1 && entry[i] == devname[i]) -+ i++; -+ return (devname[i] != entry[i] && entry[i] != 1); -+} -+ -+#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; -+ -+ read_lock_bh(&table->lock); -+ private = table->private; -+ 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, hook, 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=mc): -+ // - 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 2005-03-14 20:10:29.001600248 +0100 -+++ linux-2.4.29-ebt-brnf/include/linux/netfilter_bridge/ebtables.h 2005-03-14 21:24:12.000000000 +0100 -@@ -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_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]; -+}; -+ -+// 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]; -+}; -+ -+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]; -+}; -+ -+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]; -+}; -+ -+#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]; -+}; -+ -+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; -+}; -+ -+// [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, unsigned int hooknr, -+ 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_entry_target)-1)) & \ -+ ~(__alignof__(struct ebt_entry_target)-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 2005-03-14 20:10:29.001600248 +0100 -+++ linux-2.4.29-ebt-brnf/include/linux/netfilter_bridge/ebt_among.h 2005-03-14 00:00:30.000000000 +0100 -@@ -0,0 +1,65 @@ -+#ifndef __LINUX_BRIDGE_EBT_AMONG_H -+#define __LINUX_BRIDGE_EBT_AMONG_H -+ -+#define EBT_AMONG_DST 0x01 -+#define EBT_AMONG_SRC 0x02 -+ -+/* Grzegorz Borowiak <grzes@gnu.univ.gda.pl> 2003 -+ * -+ * Write-once-read-many hash table, used for checking if a given -+ * MAC address belongs to a set or not and possibly for checking -+ * if it is related with a given IPv4 address. -+ * -+ * The hash value of an address is its last byte. -+ * -+ * In real-world ethernet addresses, values of the last byte are -+ * evenly distributed and there is no need to consider other bytes. -+ * It would only slow the routines down. -+ * -+ * For MAC address comparison speedup reasons, we introduce a trick. -+ * MAC address is mapped onto an array of two 32-bit integers. -+ * This pair of integers is compared with MAC addresses in the -+ * hash table, which are stored also in form of pairs of integers -+ * (in `cmp' array). This is quick as it requires only two elementary -+ * number comparisons in worst case. Further, we take advantage of -+ * fact that entropy of 3 last bytes of address is larger than entropy -+ * of 3 first bytes. So first we compare 4 last bytes of addresses and -+ * if they are the same we compare 2 first. -+ * -+ * Yes, it is a memory overhead, but in 2003 AD, who cares? -+ */ -+ -+struct ebt_mac_wormhash_tuple -+{ -+ uint32_t cmp[2]; -+ uint32_t ip; -+}; -+ -+struct ebt_mac_wormhash -+{ -+ int table[257]; -+ int poolsize; -+ struct ebt_mac_wormhash_tuple pool[0]; -+}; -+ -+#define ebt_mac_wormhash_size(x) ((x) ? sizeof(struct ebt_mac_wormhash) \ -+ + (x)->poolsize * sizeof(struct ebt_mac_wormhash_tuple) : 0) -+ -+struct ebt_among_info -+{ -+ int wh_dst_ofs; -+ int wh_src_ofs; -+ int bitmask; -+}; -+ -+#define EBT_AMONG_DST_NEG 0x1 -+#define EBT_AMONG_SRC_NEG 0x2 -+ -+#define ebt_among_wh_dst(x) ((x)->wh_dst_ofs ? \ -+ (struct ebt_mac_wormhash*)((char*)(x) + (x)->wh_dst_ofs) : NULL) -+#define ebt_among_wh_src(x) ((x)->wh_src_ofs ? \ -+ (struct ebt_mac_wormhash*)((char*)(x) + (x)->wh_src_ofs) : NULL) -+ -+#define EBT_AMONG_MATCH "among" -+ -+#endif ---- /dev/null 2005-03-14 20:10:29.001600248 +0100 -+++ linux-2.4.29-ebt-brnf/include/linux/netfilter_bridge/ebt_limit.h 2005-03-14 00:00:30.000000000 +0100 -@@ -0,0 +1,23 @@ -+#ifndef __LINUX_BRIDGE_EBT_LIMIT_H -+#define __LINUX_BRIDGE_EBT_LIMIT_H -+ -+#define EBT_LIMIT_MATCH "limit" -+ -+/* timings are in milliseconds. */ -+#define EBT_LIMIT_SCALE 10000 -+ -+/* 1/10,000 sec period => max of 10,000/sec. Min rate is then 429490 -+ seconds, or one every 59 hours. */ -+ -+struct ebt_limit_info -+{ -+ u_int32_t avg; /* Average secs between packets * scale */ -+ u_int32_t burst; /* Period multiplier for upper limit. */ -+ -+ /* Used internally by the kernel */ -+ unsigned long prev; -+ u_int32_t credit; -+ u_int32_t credit_cap, cost; -+}; -+ -+#endif ---- /dev/null 2005-03-14 20:10:29.001600248 +0100 -+++ linux-2.4.29-ebt-brnf/include/linux/netfilter_bridge/ebt_arpreply.h 2005-03-14 00:00:30.000000000 +0100 -@@ -0,0 +1,11 @@ -+#ifndef __LINUX_BRIDGE_EBT_ARPREPLY_H -+#define __LINUX_BRIDGE_EBT_ARPREPLY_H -+ -+struct ebt_arpreply_info -+{ -+ unsigned char mac[ETH_ALEN]; -+ int target; -+}; -+#define EBT_ARPREPLY_TARGET "arpreply" -+ -+#endif ---- /dev/null 2005-03-14 20:10:29.001600248 +0100 -+++ linux-2.4.29-ebt-brnf/include/linux/netfilter_bridge/ebt_802_3.h 2005-03-14 00:00:30.000000000 +0100 -@@ -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 2005-03-14 20:10:29.001600248 +0100 -+++ linux-2.4.29-ebt-brnf/include/linux/netfilter_bridge/ebt_arp.h 2005-03-14 00:00:30.000000000 +0100 -@@ -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 2005-03-14 20:10:29.001600248 +0100 -+++ linux-2.4.29-ebt-brnf/include/linux/netfilter_bridge/ebt_ip.h 2005-03-14 00:00:30.000000000 +0100 -@@ -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 2005-03-14 20:10:29.001600248 +0100 -+++ linux-2.4.29-ebt-brnf/include/linux/netfilter_bridge/ebt_pkttype.h 2005-03-14 00:00:30.000000000 +0100 -@@ -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 2005-03-14 20:10:29.001600248 +0100 -+++ linux-2.4.29-ebt-brnf/include/linux/netfilter_bridge/ebt_stp.h 2005-03-14 00:00:30.000000000 +0100 -@@ -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 2005-03-14 20:10:29.001600248 +0100 -+++ linux-2.4.29-ebt-brnf/include/linux/netfilter_bridge/ebt_vlan.h 2005-03-14 00:00:30.000000000 +0100 -@@ -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 2005-03-14 20:10:29.001600248 +0100 -+++ linux-2.4.29-ebt-brnf/include/linux/netfilter_bridge/ebt_log.h 2005-03-14 00:00:30.000000000 +0100 -@@ -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 2005-03-14 20:10:29.001600248 +0100 -+++ linux-2.4.29-ebt-brnf/include/linux/netfilter_bridge/ebt_ulog.h 2005-03-14 00:00:30.000000000 +0100 -@@ -0,0 +1,33 @@ -+#ifndef _EBT_ULOG_H -+#define _EBT_ULOG_H -+ -+#define EBT_ULOG_DEFAULT_NLGROUP 0 -+#define EBT_ULOG_DEFAULT_QTHRESHOLD 1 -+#define EBT_ULOG_MAXNLGROUPS 32 /* hardcoded netlink max */ -+#define EBT_ULOG_PREFIX_LEN 32 -+#define EBT_ULOG_MAX_QLEN 50 -+#define EBT_ULOG_WATCHER "ulog" -+ -+struct ebt_ulog_info { -+ uint32_t nlgroup; -+ unsigned int cprange; -+ unsigned int qthreshold; -+ char prefix[EBT_ULOG_PREFIX_LEN]; -+}; -+ -+typedef struct ebt_ulog_packet_msg { -+ char indev[IFNAMSIZ]; -+ char outdev[IFNAMSIZ]; -+ char physindev[IFNAMSIZ]; -+ char physoutdev[IFNAMSIZ]; -+ char prefix[EBT_ULOG_PREFIX_LEN]; -+ struct timeval stamp; -+ unsigned long mark; -+ unsigned int hook; -+ size_t data_len; -+ /* The complete packet, including Ethernet header and perhaps -+ * the VLAN header is appended */ -+ unsigned char data[0] __attribute__ ((aligned (__alignof__(int)))); -+} ebt_ulog_packet_msg_t; -+ -+#endif /* _EBT_ULOG_H */ ---- /dev/null 2005-03-14 20:10:29.001600248 +0100 -+++ linux-2.4.29-ebt-brnf/include/linux/netfilter_bridge/ebt_nat.h 2005-03-14 00:00:30.000000000 +0100 -@@ -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 2005-03-14 20:10:29.001600248 +0100 -+++ linux-2.4.29-ebt-brnf/include/linux/netfilter_bridge/ebt_redirect.h 2005-03-14 00:00:30.000000000 +0100 -@@ -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 2005-03-14 20:10:29.001600248 +0100 -+++ linux-2.4.29-ebt-brnf/include/linux/netfilter_bridge/ebt_mark_m.h 2005-03-14 00:00:30.000000000 +0100 -@@ -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 2005-03-14 20:10:29.001600248 +0100 -+++ linux-2.4.29-ebt-brnf/include/linux/netfilter_bridge/ebt_mark_t.h 2005-03-14 00:00:30.000000000 +0100 -@@ -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-2.4.29/include/linux/netfilter.h 2005-01-19 15:10:12.000000000 +0100 -+++ linux-2.4.29-ebt-brnf/include/linux/netfilter.h 2005-03-14 21:11:36.000000000 +0100 -@@ -17,7 +17,8 @@ - #define NF_STOLEN 2 - #define NF_QUEUE 3 - #define NF_REPEAT 4 --#define NF_MAX_VERDICT NF_REPEAT -+#define NF_STOP 5 -+#define NF_MAX_VERDICT NF_STOP - - /* Generic cache responses from hook functions. - <= 0x2000 is used for protocol-flags. */ -@@ -118,17 +119,34 @@ 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) \ -+({int __ret; \ -+if ((__ret=nf_hook_slow(pf, hook, &(skb), indev, outdev, okfn, INT_MIN)) == 1) \ -+ __ret = (okfn)(skb); \ -+__ret;}) -+#define NF_HOOK_THRESH(pf, hook, skb, indev, outdev, okfn, thresh) \ -+({int __ret; \ -+if ((__ret=nf_hook_slow(pf, hook, &(skb), indev, outdev, okfn, thresh)) == 1) \ -+ __ret = (okfn)(skb); \ -+__ret;}) - #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))) -+#define NF_HOOK(pf, hook, skb, indev, outdev, okfn) \ -+({int __ret; \ -+if (list_empty(&nf_hooks[pf][hook]) || \ -+ (__ret=nf_hook_slow(pf, hook, &(skb), indev, outdev, okfn, INT_MIN)) == 1) \ -+ __ret = (okfn)(skb); \ -+__ret;}) -+#define NF_HOOK_THRESH(pf, hook, skb, indev, outdev, okfn, thresh) \ -+({int __ret; \ -+if (list_empty(&nf_hooks[pf][hook]) || \ -+ (__ret=nf_hook_slow(pf, hook, &(skb), indev, outdev, okfn, thresh)) == 1) \ -+ __ret = (okfn)(skb); \ -+__ret;}) - #endif - --int nf_hook_slow(int pf, unsigned int hook, struct sk_buff *skb, -+int nf_hook_slow(int pf, unsigned int hook, struct sk_buff **pskb, - 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, ---- linux-2.4.29/include/linux/netfilter_ipv4.h 2002-02-25 20:38:13.000000000 +0100 -+++ linux-2.4.29-ebt-brnf/include/linux/netfilter_ipv4.h 2005-03-14 21:11:36.000000000 +0100 -@@ -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-2.4.29/include/linux/netfilter_ipv6.h 2001-01-02 01:17:54.000000000 +0100 -+++ linux-2.4.29-ebt-brnf/include/linux/netfilter_ipv6.h 2005-03-14 21:24:11.000000000 +0100 -@@ -57,8 +57,10 @@ - enum nf_ip6_hook_priorities { - NF_IP6_PRI_FIRST = INT_MIN, - NF_IP6_PRI_CONNTRACK = -200, -+ NF_IP6_PRI_BRIDGE_SABOTAGE_FORWARD = -175, - NF_IP6_PRI_MANGLE = -150, - NF_IP6_PRI_NAT_DST = -100, -+ NF_IP6_PRI_BRIDGE_SABOTAGE_LOCAL_OUT = -50, - NF_IP6_PRI_FILTER = 0, - NF_IP6_PRI_NAT_SRC = 100, - NF_IP6_PRI_LAST = INT_MAX, ---- linux-2.4.29/include/linux/skbuff.h 2004-08-08 01:26:06.000000000 +0200 -+++ linux-2.4.29-ebt-brnf/include/linux/skbuff.h 2005-03-14 21:07:31.000000000 +0100 -@@ -92,6 +92,20 @@ 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; -+#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE) -+ struct net_device *netoutdev; -+#endif -+ unsigned int mask; -+ unsigned long data[32 / sizeof(unsigned long)]; -+}; -+#endif -+ - #endif - - struct sk_buff_head { -@@ -208,6 +222,9 @@ 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) -@@ -1175,6 +1192,20 @@ nf_reset(struct sk_buff *skb) - skb->nf_debug = 0; - #endif - } -+ -+#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 -+ - #else /* CONFIG_NETFILTER */ - static inline void nf_reset(struct sk_buff *skb) {} - #endif /* CONFIG_NETFILTER */ ---- linux-2.4.29/net/core/netfilter.c 2005-01-19 15:10:13.000000000 +0100 -+++ linux-2.4.29-ebt-brnf/net/core/netfilter.c 2005-03-14 21:21:41.825275416 +0100 -@@ -342,32 +342,29 @@ 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) - { -+ unsigned int verdict; -+ - for (*i = (*i)->next; *i != head; *i = (*i)->next) { - struct nf_hook_ops *elem = (struct nf_hook_ops *)*i; -- switch (elem->hook(hook, skb, indev, outdev, okfn)) { -- case NF_QUEUE: -- return NF_QUEUE; -- -- case NF_STOLEN: -- return NF_STOLEN; -- -- case NF_DROP: -- return NF_DROP; - -- case NF_REPEAT: -- *i = (*i)->prev; -- break; -+ if (hook_thresh > elem->priority) -+ continue; - -+ verdict = elem->hook(hook, skb, indev, outdev, okfn); -+ if (verdict != NF_ACCEPT) { - #ifdef CONFIG_NETFILTER_DEBUG -- case NF_ACCEPT: -- break; -- -- default: -- NFDEBUG("Evil return from %p(%u).\n", -- elem->hook, hook); -+ if (unlikely(verdict > NF_MAX_VERDICT)) { -+ NFDEBUG("Evil return from %p(%u).\n", -+ elem->hook, hook); -+ continue; -+ } - #endif -+ if (verdict != NF_REPEAT) -+ return verdict; -+ *i = (*i)->prev; - } - } - return NF_ACCEPT; -@@ -413,6 +410,10 @@ 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); -@@ -435,36 +436,52 @@ static void nf_queue(struct sk_buff *skb - 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; - } - } - --int nf_hook_slow(int pf, unsigned int hook, struct sk_buff *skb, -+/* Returns 1 if okfn() needs to be executed by the caller, -+ * -EPERM for NF_DROP, 0 otherwise. */ -+int nf_hook_slow(int pf, unsigned int hook, struct sk_buff **pskb, - 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; - int ret = 0; - - /* This stopgap cannot be removed until all the hooks are audited. */ -- if (skb_is_nonlinear(skb) && skb_linearize(skb, GFP_ATOMIC) != 0) { -- kfree_skb(skb); -+ if (skb_is_nonlinear(*pskb) && skb_linearize(*pskb, GFP_ATOMIC) != 0) { -+ kfree_skb(*pskb); - return -ENOMEM; - } -- if (skb->ip_summed == CHECKSUM_HW) { -+ if ((*pskb)->ip_summed == CHECKSUM_HW) { - if (outdev == NULL) { -- skb->ip_summed = CHECKSUM_NONE; -+ (*pskb)->ip_summed = CHECKSUM_NONE; - } else { -- skb_checksum_help(skb); -+ skb_checksum_help(*pskb); - } - } - -@@ -472,30 +489,24 @@ int nf_hook_slow(int pf, unsigned int ho - br_read_lock_bh(BR_NETPROTO_LOCK); - - #ifdef CONFIG_NETFILTER_DEBUG -- if (skb->nf_debug & (1 << hook)) { -+ if (unlikely((*pskb)->nf_debug & (1 << hook))) { - printk("nf_hook: hook %i already set.\n", hook); -- nf_dump_skb(pf, skb); -+ nf_dump_skb(pf, *pskb); - } -- skb->nf_debug |= (1 << hook); -+ (*pskb)->nf_debug |= (1 << hook); - #endif - - elem = &nf_hooks[pf][hook]; -- verdict = nf_iterate(&nf_hooks[pf][hook], &skb, hook, indev, -- outdev, &elem, okfn); -- if (verdict == NF_QUEUE) { -- NFDEBUG("nf_hook: Verdict = QUEUE.\n"); -- nf_queue(skb, elem, pf, hook, indev, outdev, okfn); -- } -- -- switch (verdict) { -- case NF_ACCEPT: -- ret = okfn(skb); -- break; -- -- case NF_DROP: -- kfree_skb(skb); -+ verdict = nf_iterate(&nf_hooks[pf][hook], pskb, hook, indev, -+ outdev, &elem, okfn, hook_thresh); -+ if (verdict == NF_ACCEPT || verdict == NF_STOP) -+ ret = 1; -+ else if (verdict == NF_DROP) { -+ kfree_skb(*pskb); - ret = -EPERM; -- break; -+ } else if (verdict == NF_QUEUE) { -+ NFDEBUG("nf_hook: Verdict = QUEUE.\n"); -+ nf_queue(*pskb, elem, pf, hook, indev, outdev, okfn); - } - - br_read_unlock_bh(BR_NETPROTO_LOCK); -@@ -510,6 +521,14 @@ 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. */ -@@ -530,7 +549,7 @@ void nf_reinject(struct sk_buff *skb, st - verdict = nf_iterate(&nf_hooks[info->pf][info->hook], - &skb, info->hook, - info->indev, info->outdev, &elem, -- info->okfn); -+ info->okfn, INT_MIN); - } - - switch (verdict) { ---- linux-2.4.29/net/core/skbuff.c 2003-08-25 13:44:44.000000000 +0200 -+++ linux-2.4.29-ebt-brnf/net/core/skbuff.c 2005-03-14 00:00:30.000000000 +0100 -@@ -246,6 +246,9 @@ 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; -@@ -326,6 +329,9 @@ 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); -@@ -393,6 +399,9 @@ 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); -@@ -405,6 +414,9 @@ 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; - } -@@ -440,6 +452,10 @@ static void copy_skb_header(struct sk_bu - #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 - new->tc_index = old->tc_index; -@@ -726,9 +742,9 @@ struct sk_buff *skb_copy_expand(const st - /* Set the tail pointer and length */ - skb_put(n,skb->len); - -- /* Copy the data only. */ -- if (skb_copy_bits(skb, 0, n->data, skb->len)) -- BUG(); -+ /* Copy the linear data and header. */ -+ if (skb_copy_bits(skb, -newheadroom, n->head, newheadroom + skb->len)) -+ BUG(); - - copy_skb_header(n, skb); - return n; ---- linux-2.4.29/net/ipv4/netfilter/ip_tables.c 2005-01-19 15:10:13.000000000 +0100 -+++ linux-2.4.29-ebt-brnf/net/ipv4/netfilter/ip_tables.c 2005-03-14 00:00:30.000000000 +0100 -@@ -118,12 +118,19 @@ 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)) - -@@ -153,7 +160,15 @@ 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)":""); -@@ -166,7 +181,15 @@ 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)":""); -@@ -265,6 +288,9 @@ 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; - -@@ -274,6 +300,13 @@ 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 -@@ -309,7 +342,15 @@ 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-2.4.29/net/ipv4/ip_output.c 2005-01-19 15:10:13.000000000 +0100 -+++ linux-2.4.29-ebt-brnf/net/ipv4/ip_output.c 2005-03-14 00:00:30.000000000 +0100 -@@ -890,6 +890,10 @@ 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-2.4.29/net/ipv4/netfilter/ipt_LOG.c 2003-11-28 19:26:21.000000000 +0100 -+++ linux-2.4.29-ebt-brnf/net/ipv4/netfilter/ipt_LOG.c 2005-03-14 00:00:30.000000000 +0100 -@@ -316,6 +316,18 @@ 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-2.4.29/net/ipv4/netfilter/Makefile 2003-08-25 13:44:44.000000000 +0200 -+++ linux-2.4.29-ebt-brnf/net/ipv4/netfilter/Makefile 2005-03-14 00:00:30.000000000 +0100 -@@ -87,6 +87,8 @@ 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-$(CONFIG_IP_NF_TARGET_MIRROR) += ipt_MIRROR.o ---- linux-2.4.29/net/ipv4/netfilter/Config.in 2005-01-19 15:10:13.000000000 +0100 -+++ linux-2.4.29-ebt-brnf/net/ipv4/netfilter/Config.in 2005-03-14 00:00:30.000000000 +0100 -@@ -44,6 +44,9 @@ if [ "$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 $CONFIG_IP_NF_IPTABLES -+ fi - # The targets - dep_tristate ' Packet filtering' CONFIG_IP_NF_FILTER $CONFIG_IP_NF_IPTABLES - if [ "$CONFIG_IP_NF_FILTER" != "n" ]; then ---- /dev/null 2005-03-14 20:10:29.001600248 +0100 -+++ linux-2.4.29-ebt-brnf/net/bridge/br_netfilter.c 2005-03-14 00:00:30.000000000 +0100 -@@ -0,0 +1,1101 @@ -+/* -+ * Handle firewalling -+ * Linux ethernet bridge -+ * -+ * Authors: -+ * Lennert Buytenhek <buytenh@gnu.org> -+ * Bart De Schuymer (maintainer) <bdschuym@pandora.be> -+ * -+ * Changes: -+ * Apr 29 2003: physdev module support (bdschuym) -+ * Jun 19 2003: let arptables see bridged ARP traffic (bdschuym) -+ * Oct 06 2003: filter encapsulated IP/ARP VLAN traffic on untagged bridge -+ * (bdschuym) -+ * Aug 28 2004: add IPv6 filtering (bdschuym) -+ * -+ * 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/if_vlan.h> -+#include <linux/netfilter_bridge.h> -+#include <linux/netfilter_ipv4.h> -+#include <linux/netfilter_ipv6.h> -+#include <linux/in_route.h> -+#include <net/ip.h> -+#include <net/ipv6.h> -+#include <asm/uaccess.h> -+#include <asm/checksum.h> -+#include "br_private.h" -+#ifdef CONFIG_SYSCTL -+#include <linux/sysctl.h> -+#endif -+ -+#define skb_origaddr(skb) (((struct bridge_skb_cb *) \ -+ (skb->nf_bridge->data))->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 has_bridge_parent(device) ((device)->br_port != NULL) -+#define bridge_parent(device) (&((device)->br_port->br->dev)) -+ -+#ifdef CONFIG_SYSCTL -+static struct ctl_table_header *brnf_sysctl_header; -+static int brnf_call_iptables = 1; -+static int brnf_call_ip6tables = 1; -+static int brnf_call_arptables = 1; -+static int brnf_filter_vlan_tagged = 1; -+#else -+#define brnf_filter_vlan_tagged 1 -+#endif -+ -+#define IS_VLAN_IP (skb->protocol == __constant_htons(ETH_P_8021Q) && \ -+ hdr->h_vlan_encapsulated_proto == __constant_htons(ETH_P_IP) && \ -+ brnf_filter_vlan_tagged) -+#define IS_VLAN_IPV6 (skb->protocol == __constant_htons(ETH_P_8021Q) && \ -+ hdr->h_vlan_encapsulated_proto == __constant_htons(ETH_P_IPV6) && \ -+ brnf_filter_vlan_tagged) -+/* -+#define IS_VLAN_ARP (skb->protocol == __constant_htons(ETH_P_8021Q) && \ -+ hdr->h_vlan_encapsulated_proto == __constant_htons(ETH_P_ARP) && \ -+ brnf_filter_vlan_tagged) -+*/ -+ -+/* 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 *********************************************/ -+/* Undo the changes made for ip6tables PREROUTING and continue the -+ * bridge PRE_ROUTING hook. */ -+static int br_nf_pre_routing_finish_ipv6(struct sk_buff *skb) -+{ -+ 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; -+ } -+ nf_bridge->mask ^= BRNF_NF_BRIDGE_PREROUTING; -+ -+ skb->dst = (struct dst_entry *)&__fake_rtable; -+ dst_hold(skb->dst); -+ -+ skb->dev = nf_bridge->physindev; -+ if (skb->protocol == __constant_htons(ETH_P_8021Q)) { -+ skb_push(skb, VLAN_HLEN); -+ skb->nh.raw -= VLAN_HLEN; -+ } -+ NF_HOOK_THRESH(PF_BRIDGE, NF_BR_PRE_ROUTING, skb, skb->dev, NULL, -+ br_handle_frame_finish, 1); -+ -+ return 0; -+} -+ -+static void __br_dnat_complain(void) -+{ -+ static unsigned long last_complaint; -+ -+ 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->nf_bridge->mask ^= BRNF_NF_BRIDGE_PREROUTING; -+ -+ skb->dev = bridge_parent(skb->dev); -+ if (skb->protocol == __constant_htons(ETH_P_8021Q)) { -+ skb_pull(skb, VLAN_HLEN); -+ skb->nh.raw += VLAN_HLEN; -+ } -+ 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; -+ } -+ nf_bridge->mask ^= BRNF_NF_BRIDGE_PREROUTING; -+ -+ 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; -+ if (skb->protocol == -+ __constant_htons(ETH_P_8021Q)) { -+ skb_push(skb, VLAN_HLEN); -+ skb->nh.raw -= VLAN_HLEN; -+ } -+ 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); -+ skb->pkt_type = PACKET_HOST; -+ } -+ } else { -+ skb->dst = (struct dst_entry *)&__fake_rtable; -+ dst_hold(skb->dst); -+ } -+ -+ skb->dev = nf_bridge->physindev; -+ if (skb->protocol == __constant_htons(ETH_P_8021Q)) { -+ skb_push(skb, VLAN_HLEN); -+ skb->nh.raw -= VLAN_HLEN; -+ } -+ NF_HOOK_THRESH(PF_BRIDGE, NF_BR_PRE_ROUTING, skb, skb->dev, NULL, -+ br_handle_frame_finish, 1); -+ -+ return 0; -+} -+ -+/* Some common code for IPv4/IPv6 */ -+static void setup_pre_routing(struct sk_buff *skb) -+{ -+ struct nf_bridge_info *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_NF_BRIDGE_PREROUTING; -+ nf_bridge->physindev = skb->dev; -+ skb->dev = bridge_parent(skb->dev); -+} -+ -+/* We only check the length. A bridge shouldn't do any hop-by-hop stuff anyway */ -+static int check_hbh_len(struct sk_buff *skb) -+{ -+ unsigned char *raw = (u8*)(skb->nh.ipv6h+1); -+ u32 pkt_len; -+ int off = raw - skb->nh.raw; -+ int len = (raw[1]+1)<<3; -+ -+ if ((raw + len) - skb->data > skb_headlen(skb)) -+ goto bad; -+ -+ off += 2; -+ len -= 2; -+ -+ while (len > 0) { -+ int optlen = raw[off+1]+2; -+ -+ switch (skb->nh.raw[off]) { -+ case IPV6_TLV_PAD0: -+ optlen = 1; -+ break; -+ -+ case IPV6_TLV_PADN: -+ break; -+ -+ case IPV6_TLV_JUMBO: -+ if (skb->nh.raw[off+1] != 4 || (off&3) != 2) -+ goto bad; -+ -+ pkt_len = ntohl(*(u32*)(skb->nh.raw+off+2)); -+ -+ if (pkt_len > skb->len - sizeof(struct ipv6hdr)) -+ goto bad; -+ if (pkt_len + sizeof(struct ipv6hdr) < skb->len) { -+ if (__pskb_trim(skb, -+ pkt_len + sizeof(struct ipv6hdr))) -+ goto bad; -+ if (skb->ip_summed == CHECKSUM_HW) -+ skb->ip_summed = CHECKSUM_NONE; -+ } -+ break; -+ default: -+ if (optlen > len) -+ goto bad; -+ break; -+ } -+ off += optlen; -+ len -= optlen; -+ } -+ if (len == 0) -+ return 0; -+bad: -+ return -1; -+ -+} -+ -+/* Replicate the checks that IPv6 does on packet reception and pass the packet -+ * to ip6tables, which doesn't support NAT, so things are fairly simple. */ -+static unsigned int br_nf_pre_routing_ipv6(unsigned int hook, -+ struct sk_buff *skb, const struct net_device *in, -+ const struct net_device *out, int (*okfn)(struct sk_buff *)) -+{ -+ struct ipv6hdr *hdr; -+ u32 pkt_len; -+ struct nf_bridge_info *nf_bridge; -+ -+ if (skb->len < sizeof(struct ipv6hdr)) -+ goto inhdr_error; -+ -+ if (!pskb_may_pull(skb, sizeof(struct ipv6hdr))) -+ goto inhdr_error; -+ -+ hdr = skb->nh.ipv6h; -+ -+ if (hdr->version != 6) -+ goto inhdr_error; -+ -+ pkt_len = ntohs(hdr->payload_len); -+ -+ if (pkt_len || hdr->nexthdr != NEXTHDR_HOP) { -+ if (pkt_len + sizeof(struct ipv6hdr) > skb->len) -+ goto inhdr_error; -+ if (pkt_len + sizeof(struct ipv6hdr) < skb->len) { -+ if (__pskb_trim(skb, pkt_len + sizeof(struct ipv6hdr))) -+ goto inhdr_error; -+ if (skb->ip_summed == CHECKSUM_HW) -+ skb->ip_summed = CHECKSUM_NONE; -+ } -+ } -+ if (hdr->nexthdr == NEXTHDR_HOP && check_hbh_len(skb)) -+ goto inhdr_error; -+ -+#ifdef CONFIG_NETFILTER_DEBUG -+ skb->nf_debug ^= (1 << NF_IP6_PRE_ROUTING); -+#endif -+ if ((nf_bridge = nf_bridge_alloc(skb)) == NULL) -+ return NF_DROP; -+ setup_pre_routing(skb); -+ -+ NF_HOOK(PF_INET6, NF_IP6_PRE_ROUTING, skb, skb->dev, NULL, -+ br_nf_pre_routing_finish_ipv6); -+ -+ return NF_STOLEN; -+ -+inhdr_error: -+ return NF_DROP; -+} -+ -+/* Direct IPv6 traffic to br_nf_pre_routing_ipv6. -+ * 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 = *pskb; -+ struct nf_bridge_info *nf_bridge; -+ struct vlan_ethhdr *hdr = (struct vlan_ethhdr *) -+ ((*pskb)->mac.ethernet); -+ -+ if (skb->protocol == __constant_htons(ETH_P_IPV6) || IS_VLAN_IPV6) { -+#ifdef CONFIG_SYSCTL -+ if (!brnf_call_ip6tables) -+ return NF_ACCEPT; -+#endif -+ if ((skb = skb_share_check(*pskb, GFP_ATOMIC)) == NULL) -+ goto out; -+ -+ if (skb->protocol == __constant_htons(ETH_P_8021Q)) { -+ skb_pull(skb, VLAN_HLEN); -+ (skb)->nh.raw += VLAN_HLEN; -+ } -+ return br_nf_pre_routing_ipv6(hook, skb, in, out, okfn); -+ } -+ -+#ifdef CONFIG_SYSCTL -+ if (!brnf_call_iptables) -+ return NF_ACCEPT; -+#endif -+ -+ if (skb->protocol != __constant_htons(ETH_P_IP) && !IS_VLAN_IP) -+ return NF_ACCEPT; -+ if ((skb = skb_share_check(*pskb, GFP_ATOMIC)) == NULL) -+ goto out; -+ -+ if (skb->protocol == __constant_htons(ETH_P_8021Q)) { -+ skb_pull(skb, VLAN_HLEN); -+ (skb)->nh.raw += VLAN_HLEN; -+ } -+ -+ 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; -+ -+ setup_pre_routing(skb); -+ 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->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; -+ struct net_device *in; -+/* struct vlan_ethhdr *hdr = (struct vlan_ethhdr *)(skb->mac.ethernet);*/ -+ -+#ifdef CONFIG_NETFILTER_DEBUG -+ skb->nf_debug ^= (1 << NF_BR_FORWARD); -+#endif -+ -+/* if (skb->protocol != __constant_htons(ETH_P_ARP) && !IS_VLAN_ARP) {*/ -+ in = nf_bridge->physindev; -+ if (nf_bridge->mask & BRNF_PKT_TYPE) { -+ skb->pkt_type = PACKET_OTHERHOST; -+ nf_bridge->mask ^= BRNF_PKT_TYPE; -+ } -+/* } else { -+ in = *((struct net_device **)(skb->cb)); -+ }*/ -+ if (skb->protocol == __constant_htons(ETH_P_8021Q)) { -+ skb_push(skb, VLAN_HLEN); -+ skb->nh.raw -= VLAN_HLEN; -+ } -+ NF_HOOK_THRESH(PF_BRIDGE, NF_BR_FORWARD, skb, in, -+ skb->dev, br_forward_finish, 1); -+ return 0; -+} -+ -+/* This is the 'purely bridged' case. For IP, 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. For ARP, indev and outdev are the -+ * bridge ports. -+ */ -+static unsigned int br_nf_forward_ip(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; -+ struct vlan_ethhdr *hdr = (struct vlan_ethhdr *)(skb->mac.ethernet); -+ int pf; -+ -+ if (!skb->nf_bridge) -+ return NF_ACCEPT; -+ -+ if (skb->protocol == __constant_htons(ETH_P_IP) || IS_VLAN_IP) -+ pf = PF_INET; -+ else -+ pf = PF_INET6; -+ -+ if (skb->protocol == __constant_htons(ETH_P_8021Q)) { -+ skb_pull(*pskb, VLAN_HLEN); -+ (*pskb)->nh.raw += VLAN_HLEN; -+ } -+ -+#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; -+ } -+ -+ /* The physdev module checks on this */ -+ nf_bridge->mask |= BRNF_BRIDGED; -+ nf_bridge->physoutdev = skb->dev; -+ -+ NF_HOOK(pf, NF_IP_FORWARD, skb, bridge_parent(in), -+ bridge_parent(out), br_nf_forward_finish); -+ -+ return NF_STOLEN; -+} -+ -+/* -+static unsigned int br_nf_forward_arp(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 vlan_ethhdr *hdr = (struct vlan_ethhdr *)(skb->mac.ethernet); -+ struct net_device **d = (struct net_device **)(skb->cb); -+ -+ if (!brnf_call_arptables) -+ return NF_ACCEPT; -+ -+ if (skb->protocol != __constant_htons(ETH_P_ARP)) { -+ if (!IS_VLAN_ARP) -+ return NF_ACCEPT; -+ skb_pull(*pskb, VLAN_HLEN); -+ (*pskb)->nh.raw += VLAN_HLEN; -+ } -+ -+#ifdef CONFIG_NETFILTER_DEBUG -+ skb->nf_debug ^= (1 << NF_BR_FORWARD); -+#endif -+ -+ if (skb->nh.arph->ar_pln != 4) { -+ if (IS_VLAN_ARP) { -+ skb_push(*pskb, VLAN_HLEN); -+ (*pskb)->nh.raw -= VLAN_HLEN; -+ } -+ return NF_ACCEPT; -+ } -+ *d = (struct net_device *)in; -+ NF_HOOK(NF_ARP, NF_ARP_FORWARD, skb, (struct net_device *)in, -+ (struct net_device *)out, 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 -+ if (skb->protocol == __constant_htons(ETH_P_8021Q)) { -+ skb_push(skb, VLAN_HLEN); -+ skb->nh.raw -= VLAN_HLEN; -+ } -+ -+ 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 *)) -+{ -+ struct net_device *realindev, *realoutdev; -+ struct sk_buff *skb = *pskb; -+ struct nf_bridge_info *nf_bridge; -+ struct vlan_ethhdr *hdr = (struct vlan_ethhdr *)(skb->mac.ethernet); -+ int pf; -+ -+ if (!skb->nf_bridge) -+ return NF_ACCEPT; -+ -+ if (skb->protocol == __constant_htons(ETH_P_IP) || IS_VLAN_IP) -+ pf = PF_INET; -+ else -+ pf = PF_INET6; -+ -+#ifdef CONFIG_NETFILTER_DEBUG -+ /* Sometimes we get packets with NULL ->dst here (for example, -+ * running a dhcp client daemon triggers this). This should now -+ * be fixed, but let's keep the check around. */ -+ if (skb->dst == NULL) { -+ printk(KERN_CRIT "br_netfilter: skb->dst == NULL."); -+ return NF_ACCEPT; -+ } -+#endif -+ -+ 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) { -+ if (nf_bridge->mask & BRNF_PKT_TYPE) { -+ skb->pkt_type = PACKET_OTHERHOST; -+ nf_bridge->mask ^= BRNF_PKT_TYPE; -+ } -+ if (skb->protocol == __constant_htons(ETH_P_8021Q)) { -+ skb_push(skb, VLAN_HLEN); -+ skb->nh.raw -= VLAN_HLEN; -+ } -+ -+ NF_HOOK(PF_BRIDGE, NF_BR_FORWARD, skb, realindev, -+ skb->dev, br_forward_finish); -+ goto out; -+ } -+ realoutdev = bridge_parent(skb->dev); -+ -+#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE) -+ /* iptables should match -o br0.x */ -+ if (nf_bridge->netoutdev) -+ realoutdev = nf_bridge->netoutdev; -+#endif -+ if (skb->protocol == __constant_htons(ETH_P_8021Q)) { -+ skb_pull(skb, VLAN_HLEN); -+ (*pskb)->nh.raw += VLAN_HLEN; -+ } -+ /* 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, NF_IP_FORWARD, skb, realindev, -+ realoutdev, 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, NF_IP_LOCAL_OUT, skb, realindev, -+ realoutdev, okfn, -+ NF_IP_PRI_BRIDGE_SABOTAGE_LOCAL_OUT + 1); -+ } -+ -+out: -+ 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; -+ struct vlan_ethhdr *hdr = (struct vlan_ethhdr *)(skb->mac.ethernet); -+ struct net_device *realoutdev = bridge_parent(skb->dev); -+ int pf; -+ -+#ifdef CONFIG_NETFILTER_DEBUG -+ /* Be very paranoid. This probably won't happen anymore, but let's -+ * keep the check just to be sure... */ -+ 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."); -+ goto print_error; -+ } -+#endif -+ -+ if (!nf_bridge) -+ return NF_ACCEPT; -+ -+ if (skb->protocol == __constant_htons(ETH_P_IP) || IS_VLAN_IP) -+ pf = PF_INET; -+ else -+ pf = PF_INET6; -+ -+ /* 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 -+ /* Sometimes we get packets with NULL ->dst here (for example, -+ * running a dhcp client daemon triggers this). This should now -+ * be fixed, but let's keep the check around. -+ */ -+ if (skb->dst == NULL) { -+ printk(KERN_CRIT "br_netfilter: skb->dst == NULL."); -+ goto print_error; -+ } -+ -+ 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; -+ } -+ -+ if (skb->protocol == __constant_htons(ETH_P_8021Q)) { -+ skb_pull(skb, VLAN_HLEN); -+ skb->nh.raw += VLAN_HLEN; -+ } -+ -+ nf_bridge_save_header(skb); -+ -+#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE) -+ if (nf_bridge->netoutdev) -+ realoutdev = nf_bridge->netoutdev; -+#endif -+ NF_HOOK(pf, NF_IP_POST_ROUTING, skb, NULL, -+ realoutdev, br_dev_queue_push_xmit); -+ -+ return NF_STOLEN; -+ -+#ifdef CONFIG_NETFILTER_DEBUG -+print_error: -+ if (skb->dev != NULL) { -+ printk("[%s]", skb->dev->name); -+ if (has_bridge_parent(skb->dev)) -+ printk("[%s]", bridge_parent(skb->dev)->name); -+ } -+ printk(" head:%p, raw:%p, data:%p\n", skb->head, skb->mac.raw, -+ skb->data); -+ return NF_ACCEPT; -+#endif -+} -+ -+ -+/* IPv4/SABOTAGE *****************************************************/ -+ -+/* Don't hand locally destined packets to PF_INET/PRE_ROUTING -+ * for the second time. -+ */ -+static unsigned int ip_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 ((*pskb)->nf_bridge && -+ !((*pskb)->nf_bridge->mask & BRNF_NF_BRIDGE_PREROUTING)) { -+ return NF_STOP; -+ } -+ -+ 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 ip_sabotage_out(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 ((out->hard_start_xmit == br_dev_xmit && -+ okfn != br_nf_forward_finish && -+ okfn != br_nf_local_out_finish && -+ okfn != br_dev_queue_push_xmit) -+#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE) -+ || ((out->priv_flags & IFF_802_1Q_VLAN) && -+ VLAN_DEV_INFO(out)->real_dev->hard_start_xmit == br_dev_xmit) -+#endif -+ ) { -+ struct nf_bridge_info *nf_bridge; -+ -+ if (!skb->nf_bridge) { -+#ifdef CONFIG_SYSCTL -+ /* This code is executed while in the IP(v6) stack, -+ the version should be 4 or 6. We can't use -+ skb->protocol because that isn't set on -+ PF_INET(6)/LOCAL_OUT. */ -+ struct iphdr *ip = skb->nh.iph; -+ -+ if (ip->version == 4 && !brnf_call_iptables) -+ return NF_ACCEPT; -+ else if (ip->version == 6 && !brnf_call_ip6tables) -+ return NF_ACCEPT; -+#endif -+ if (hook == NF_IP_POST_ROUTING) -+ return NF_ACCEPT; -+ if (!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; -+ } -+#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE) -+ /* the iptables outdev is br0.x, not br0 */ -+ if (out->priv_flags & IFF_802_1Q_VLAN) -+ nf_bridge->netoutdev = (struct net_device *)out; -+#endif -+ return NF_STOP; -+ } -+ -+ 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_ip, -+ .pf = PF_BRIDGE, -+ .hooknum = NF_BR_FORWARD, -+ .priority = NF_BR_PRI_BRNF /*- 1*/, }, -+/* { .hook = br_nf_forward_arp, -+ .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 = ip_sabotage_in, -+ .pf = PF_INET, -+ .hooknum = NF_IP_PRE_ROUTING, -+ .priority = NF_IP_PRI_FIRST, }, -+ { .hook = ip_sabotage_in, -+ .pf = PF_INET6, -+ .hooknum = NF_IP6_PRE_ROUTING, -+ .priority = NF_IP6_PRI_FIRST, }, -+ { .hook = ip_sabotage_out, -+ .pf = PF_INET, -+ .hooknum = NF_IP_FORWARD, -+ .priority = NF_IP_PRI_BRIDGE_SABOTAGE_FORWARD, }, -+ { .hook = ip_sabotage_out, -+ .pf = PF_INET6, -+ .hooknum = NF_IP6_FORWARD, -+ .priority = NF_IP6_PRI_BRIDGE_SABOTAGE_FORWARD, }, -+ { .hook = ip_sabotage_out, -+ .pf = PF_INET, -+ .hooknum = NF_IP_LOCAL_OUT, -+ .priority = NF_IP_PRI_BRIDGE_SABOTAGE_LOCAL_OUT, }, -+ { .hook = ip_sabotage_out, -+ .pf = PF_INET6, -+ .hooknum = NF_IP6_LOCAL_OUT, -+ .priority = NF_IP6_PRI_BRIDGE_SABOTAGE_LOCAL_OUT, }, -+ { .hook = ip_sabotage_out, -+ .pf = PF_INET, -+ .hooknum = NF_IP_POST_ROUTING, -+ .priority = NF_IP_PRI_FIRST, }, -+ { .hook = ip_sabotage_out, -+ .pf = PF_INET6, -+ .hooknum = NF_IP6_POST_ROUTING, -+ .priority = NF_IP6_PRI_FIRST, }, -+}; -+ -+#ifdef CONFIG_SYSCTL -+static -+int brnf_sysctl_call_tables(ctl_table *ctl, int write, struct file * filp, -+ void *buffer, size_t *lenp) -+{ -+ int ret; -+ -+ ret = proc_dointvec(ctl, write, filp, buffer, lenp); -+ -+ if (write && *(int *)(ctl->data)) -+ *(int *)(ctl->data) = 1; -+ return ret; -+} -+ -+static ctl_table brnf_table[] = { -+ { -+ .ctl_name = NET_BRIDGE_NF_CALL_ARPTABLES, -+ .procname = "bridge-nf-call-arptables", -+ .data = &brnf_call_arptables, -+ .maxlen = sizeof(int), -+ .mode = 0644, -+ .proc_handler = &brnf_sysctl_call_tables, -+ }, -+ { -+ .ctl_name = NET_BRIDGE_NF_CALL_IPTABLES, -+ .procname = "bridge-nf-call-iptables", -+ .data = &brnf_call_iptables, -+ .maxlen = sizeof(int), -+ .mode = 0644, -+ .proc_handler = &brnf_sysctl_call_tables, -+ }, -+ { -+ .ctl_name = NET_BRIDGE_NF_CALL_IP6TABLES, -+ .procname = "bridge-nf-call-ip6tables", -+ .data = &brnf_call_ip6tables, -+ .maxlen = sizeof(int), -+ .mode = 0644, -+ .proc_handler = &brnf_sysctl_call_tables, -+ }, -+ { -+ .ctl_name = NET_BRIDGE_NF_FILTER_VLAN_TAGGED, -+ .procname = "bridge-nf-filter-vlan-tagged", -+ .data = &brnf_filter_vlan_tagged, -+ .maxlen = sizeof(int), -+ .mode = 0644, -+ .proc_handler = &brnf_sysctl_call_tables, -+ }, -+ { .ctl_name = 0 } -+}; -+ -+static ctl_table brnf_bridge_table[] = { -+ { -+ .ctl_name = NET_BRIDGE, -+ .procname = "bridge", -+ .mode = 0555, -+ .child = brnf_table, -+ }, -+ { .ctl_name = 0 } -+}; -+ -+static ctl_table brnf_net_table[] = { -+ { -+ .ctl_name = CTL_NET, -+ .procname = "net", -+ .mode = 0555, -+ .child = brnf_bridge_table, -+ }, -+ { .ctl_name = 0 } -+}; -+#endif -+ -+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; -+ } -+ -+#ifdef CONFIG_SYSCTL -+ brnf_sysctl_header = register_sysctl_table(brnf_net_table, 0); -+ if (brnf_sysctl_header == NULL) { -+ printk(KERN_WARNING "br_netfilter: can't register to sysctl.\n"); -+ for (i = 0; i < ARRAY_SIZE(br_nf_ops); i++) -+ nf_unregister_hook(&br_nf_ops[i]); -+ return -EFAULT; -+ } -+#endif -+ -+ 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]); -+#ifdef CONFIG_SYSCTL -+ unregister_sysctl_table(brnf_sysctl_header); -+#endif -+ -+} ---- /dev/null 2005-03-14 20:10:29.001600248 +0100 -+++ linux-2.4.29-ebt-brnf/net/ipv4/netfilter/ipt_physdev.c 2005-03-14 00:00:30.000000000 +0100 -@@ -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 2005-03-14 20:10:29.001600248 +0100 -+++ linux-2.4.29-ebt-brnf/include/linux/netfilter_ipv4/ipt_physdev.h 2005-03-14 21:24:30.000000000 +0100 -@@ -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 { -+ char physindev[IFNAMSIZ]; -+ char in_mask[IFNAMSIZ]; -+ char physoutdev[IFNAMSIZ]; -+ char out_mask[IFNAMSIZ]; -+ u_int8_t invert; -+ u_int8_t bitmask; -+}; -+ -+#endif /*_IPT_PHYSDEV_H*/ ---- linux-2.4.29/net/8021q/vlan_dev.c 2005-01-19 15:10:13.000000000 +0100 -+++ linux-2.4.29-ebt-brnf/net/8021q/vlan_dev.c 2005-03-14 00:00:30.000000000 +0100 -@@ -488,6 +488,10 @@ int vlan_dev_hard_start_xmit(struct sk_b - stats->tx_packets++; /* for statics only */ - stats->tx_bytes += skb->len; - -+ skb->protocol = __constant_htons(ETH_P_8021Q); -+ skb->mac.raw -= VLAN_HLEN; -+ skb->nh.raw -= VLAN_HLEN; -+ - skb->dev = VLAN_DEV_INFO(dev)->real_dev; - dev_queue_xmit(skb); - ---- linux-2.4.29/include/linux/sysctl.h 2005-01-19 15:10:13.000000000 +0100 -+++ linux-2.4.29-ebt-brnf/include/linux/sysctl.h 2005-03-14 21:07:18.000000000 +0100 -@@ -608,6 +608,15 @@ enum { - NET_DECNET_CONF_DEV_STATE = 7 - }; - -+/* /proc/sys/net/bridge */ -+enum { -+ NET_BRIDGE_NF_CALL_ARPTABLES = 1, -+ NET_BRIDGE_NF_CALL_IPTABLES = 2, -+ NET_BRIDGE_NF_CALL_IP6TABLES = 3, -+ NET_BRIDGE_NF_FILTER_VLAN_TAGGED = 4, -+}; -+ -+ - /* CTL_PROC names: */ - - /* CTL_FS names: */ ---- linux-2.4.29/net/ipv4/netfilter/ipt_REJECT.c 2005-01-19 15:10:13.000000000 +0100 -+++ linux-2.4.29-ebt-brnf/net/ipv4/netfilter/ipt_REJECT.c 2005-03-14 00:00:30.000000000 +0100 -@@ -15,6 +15,9 @@ - #include <net/route.h> - #include <linux/netfilter_ipv4/ip_tables.h> - #include <linux/netfilter_ipv4/ipt_REJECT.h> -+#ifdef CONFIG_BRIDGE_NETFILTER -+#include <linux/netfilter_bridge.h> -+#endif - - #if 0 - #define DEBUGP printk -@@ -29,7 +32,13 @@ static inline struct rtable *route_rever - struct rt_key key = {}; - struct rtable *rt; - -- if (hook != NF_IP_FORWARD) { -+ /* We don't require ip forwarding to be enabled to be able to -+ * send a RST reply for bridged traffic. */ -+ if (hook != NF_IP_FORWARD -+#ifdef CONFIG_BRIDGE_NETFILTER -+ || (skb->nf_bridge && skb->nf_bridge->mask & BRNF_BRIDGED) -+#endif -+ ) { - key.dst = iph->saddr; - if (hook == NF_IP_LOCAL_IN) - key.src = iph->daddr; |