diff options
Diffstat (limited to 'obsolete-buildroot/sources/openwrt/kernel')
| -rw-r--r-- | obsolete-buildroot/sources/openwrt/kernel/patches/140-ebtables-brnf-5.patch | 6102 |
1 files changed, 2663 insertions, 3439 deletions
diff --git a/obsolete-buildroot/sources/openwrt/kernel/patches/140-ebtables-brnf-5.patch b/obsolete-buildroot/sources/openwrt/kernel/patches/140-ebtables-brnf-5.patch index 54c6add8a..a6d594d05 100644 --- a/obsolete-buildroot/sources/openwrt/kernel/patches/140-ebtables-brnf-5.patch +++ b/obsolete-buildroot/sources/openwrt/kernel/patches/140-ebtables-brnf-5.patch @@ -1,7 +1,40 @@ -diff -Nurb linux.stock/include/linux/if_bridge.h linux/include/linux/if_bridge.h ---- linux.stock/include/linux/if_bridge.h 2003-10-14 04:09:25.000000000 -0400 -+++ linux/include/linux/if_bridge.h 2004-07-10 23:46:39.000000000 -0400 -@@ -102,7 +102,8 @@ +--- linux-2.4.21/net/bridge/br_private.h Mon Feb 25 20:38:14 2002 ++++ linux-2.4.21-ebt-brnf-3/net/bridge/br_private.h Fri Aug 8 01:09:06 2003 +@@ -144,8 +144,10 @@ extern void br_fdb_insert(struct net_bri + /* br_forward.c */ + extern void br_deliver(struct net_bridge_port *to, + struct sk_buff *skb); ++extern int br_dev_queue_push_xmit(struct sk_buff *skb); + extern void br_forward(struct net_bridge_port *to, + struct sk_buff *skb); ++extern int br_forward_finish(struct sk_buff *skb); + extern void br_flood_deliver(struct net_bridge *br, + struct sk_buff *skb, + int clone); +@@ -166,7 +168,8 @@ extern void br_get_port_ifindices(struct + int *ifindices); + + /* br_input.c */ +-extern void br_handle_frame(struct sk_buff *skb); ++extern int br_handle_frame_finish(struct sk_buff *skb); ++extern int br_handle_frame(struct sk_buff *skb); + + /* br_ioctl.c */ + extern void br_call_ioctl_atomic(void (*fn)(void)); +@@ -176,6 +179,10 @@ extern int br_ioctl(struct net_bridge *b + unsigned long arg1, + unsigned long arg2); + extern int br_ioctl_deviceless_stub(unsigned long arg); ++ ++/* br_netfilter.c */ ++extern int br_netfilter_init(void); ++extern void br_netfilter_fini(void); + + /* br_stp.c */ + extern int br_is_root_bridge(struct net_bridge *br); +--- linux-2.4.21/include/linux/if_bridge.h Thu Nov 22 20:47:12 2001 ++++ linux-2.4.21-ebt-brnf-3/include/linux/if_bridge.h Fri Aug 8 01:09:06 2003 +@@ -102,7 +102,8 @@ struct net_bridge; struct net_bridge_port; extern int (*br_ioctl_hook)(unsigned long arg); @@ -11,1154 +44,126 @@ diff -Nurb linux.stock/include/linux/if_bridge.h linux/include/linux/if_bridge.h #endif -diff -Nurb linux.stock/include/linux/netfilter.h linux/include/linux/netfilter.h ---- linux.stock/include/linux/netfilter.h 2004-07-10 23:30:09.000000000 -0400 -+++ linux/include/linux/netfilter.h 2004-07-10 23:46:39.000000000 -0400 -@@ -119,17 +119,23 @@ - /* This is gross, but inline doesn't cut it for avoiding the function - call in fast path: gcc doesn't inline (needs value tracking?). --RR */ - #ifdef CONFIG_NETFILTER_DEBUG --#define NF_HOOK nf_hook_slow -+#define NF_HOOK(pf, hook, skb, indev, outdev, okfn) \ -+nf_hook_slow((pf), (hook), (skb), (indev), (outdev), (okfn), INT_MIN) -+#define NF_HOOK_THRESH nf_hook_slow - #else - #define NF_HOOK(pf, hook, skb, indev, outdev, okfn) \ - (list_empty(&nf_hooks[(pf)][(hook)]) \ - ? (okfn)(skb) \ -- : nf_hook_slow((pf), (hook), (skb), (indev), (outdev), (okfn))) -+ : nf_hook_slow((pf), (hook), (skb), (indev), (outdev), (okfn), INT_MIN)) -+#define NF_HOOK_THRESH(pf, hook, skb, indev, outdev, okfn, thresh) \ -+(list_empty(&nf_hooks[(pf)][(hook)]) \ -+ ? (okfn)(skb) \ -+ : nf_hook_slow((pf), (hook), (skb), (indev), (outdev), (okfn), (thresh))) - #endif - - int nf_hook_slow(int pf, unsigned int hook, struct sk_buff *skb, - struct net_device *indev, struct net_device *outdev, -- int (*okfn)(struct sk_buff *)); -+ int (*okfn)(struct sk_buff *), int thresh); - - /* Call setsockopt() */ - int nf_setsockopt(struct sock *sk, int pf, int optval, char *opt, -diff -Nurb linux.stock/include/linux/netfilter_bridge/ebt_802_3.h linux/include/linux/netfilter_bridge/ebt_802_3.h ---- linux.stock/include/linux/netfilter_bridge/ebt_802_3.h 1969-12-31 19:00:00.000000000 -0500 -+++ linux/include/linux/netfilter_bridge/ebt_802_3.h 2004-07-10 23:46:39.000000000 -0400 -@@ -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 -diff -Nurb linux.stock/include/linux/netfilter_bridge/ebt_among.h linux/include/linux/netfilter_bridge/ebt_among.h ---- linux.stock/include/linux/netfilter_bridge/ebt_among.h 1969-12-31 19:00:00.000000000 -0500 -+++ linux/include/linux/netfilter_bridge/ebt_among.h 2004-07-10 23:46:39.000000000 -0400 -@@ -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 -diff -Nurb linux.stock/include/linux/netfilter_bridge/ebt_arp.h linux/include/linux/netfilter_bridge/ebt_arp.h ---- linux.stock/include/linux/netfilter_bridge/ebt_arp.h 1969-12-31 19:00:00.000000000 -0500 -+++ linux/include/linux/netfilter_bridge/ebt_arp.h 2004-07-10 23:46:39.000000000 -0400 -@@ -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 -diff -Nurb linux.stock/include/linux/netfilter_bridge/ebt_arpreply.h linux/include/linux/netfilter_bridge/ebt_arpreply.h ---- linux.stock/include/linux/netfilter_bridge/ebt_arpreply.h 1969-12-31 19:00:00.000000000 -0500 -+++ linux/include/linux/netfilter_bridge/ebt_arpreply.h 2004-07-10 23:46:39.000000000 -0400 -@@ -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 -diff -Nurb linux.stock/include/linux/netfilter_bridge/ebt_ip.h linux/include/linux/netfilter_bridge/ebt_ip.h ---- linux.stock/include/linux/netfilter_bridge/ebt_ip.h 1969-12-31 19:00:00.000000000 -0500 -+++ linux/include/linux/netfilter_bridge/ebt_ip.h 2004-07-10 23:46:39.000000000 -0400 -@@ -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 -diff -Nurb linux.stock/include/linux/netfilter_bridge/ebt_limit.h linux/include/linux/netfilter_bridge/ebt_limit.h ---- linux.stock/include/linux/netfilter_bridge/ebt_limit.h 1969-12-31 19:00:00.000000000 -0500 -+++ linux/include/linux/netfilter_bridge/ebt_limit.h 2004-07-10 23:46:39.000000000 -0400 -@@ -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 -diff -Nurb linux.stock/include/linux/netfilter_bridge/ebt_log.h linux/include/linux/netfilter_bridge/ebt_log.h ---- linux.stock/include/linux/netfilter_bridge/ebt_log.h 1969-12-31 19:00:00.000000000 -0500 -+++ linux/include/linux/netfilter_bridge/ebt_log.h 2004-07-10 23:46:39.000000000 -0400 -@@ -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 -diff -Nurb linux.stock/include/linux/netfilter_bridge/ebt_mark_m.h linux/include/linux/netfilter_bridge/ebt_mark_m.h ---- linux.stock/include/linux/netfilter_bridge/ebt_mark_m.h 1969-12-31 19:00:00.000000000 -0500 -+++ linux/include/linux/netfilter_bridge/ebt_mark_m.h 2004-07-10 23:46:39.000000000 -0400 -@@ -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 -diff -Nurb linux.stock/include/linux/netfilter_bridge/ebt_mark_t.h linux/include/linux/netfilter_bridge/ebt_mark_t.h ---- linux.stock/include/linux/netfilter_bridge/ebt_mark_t.h 1969-12-31 19:00:00.000000000 -0500 -+++ linux/include/linux/netfilter_bridge/ebt_mark_t.h 2004-07-10 23:46:39.000000000 -0400 -@@ -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 -diff -Nurb linux.stock/include/linux/netfilter_bridge/ebt_nat.h linux/include/linux/netfilter_bridge/ebt_nat.h ---- linux.stock/include/linux/netfilter_bridge/ebt_nat.h 1969-12-31 19:00:00.000000000 -0500 -+++ linux/include/linux/netfilter_bridge/ebt_nat.h 2004-07-10 23:46:39.000000000 -0400 -@@ -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 -diff -Nurb linux.stock/include/linux/netfilter_bridge/ebt_pkttype.h linux/include/linux/netfilter_bridge/ebt_pkttype.h ---- linux.stock/include/linux/netfilter_bridge/ebt_pkttype.h 1969-12-31 19:00:00.000000000 -0500 -+++ linux/include/linux/netfilter_bridge/ebt_pkttype.h 2004-07-10 23:46:39.000000000 -0400 -@@ -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 -diff -Nurb linux.stock/include/linux/netfilter_bridge/ebt_redirect.h linux/include/linux/netfilter_bridge/ebt_redirect.h ---- linux.stock/include/linux/netfilter_bridge/ebt_redirect.h 1969-12-31 19:00:00.000000000 -0500 -+++ linux/include/linux/netfilter_bridge/ebt_redirect.h 2004-07-10 23:46:39.000000000 -0400 -@@ -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 -diff -Nurb linux.stock/include/linux/netfilter_bridge/ebt_stp.h linux/include/linux/netfilter_bridge/ebt_stp.h ---- linux.stock/include/linux/netfilter_bridge/ebt_stp.h 1969-12-31 19:00:00.000000000 -0500 -+++ linux/include/linux/netfilter_bridge/ebt_stp.h 2004-07-10 23:46:39.000000000 -0400 -@@ -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 -diff -Nurb linux.stock/include/linux/netfilter_bridge/ebt_vlan.h linux/include/linux/netfilter_bridge/ebt_vlan.h ---- linux.stock/include/linux/netfilter_bridge/ebt_vlan.h 1969-12-31 19:00:00.000000000 -0500 -+++ linux/include/linux/netfilter_bridge/ebt_vlan.h 2004-07-10 23:46:39.000000000 -0400 -@@ -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 -diff -Nurb linux.stock/include/linux/netfilter_bridge/ebtables.h linux/include/linux/netfilter_bridge/ebtables.h ---- linux.stock/include/linux/netfilter_bridge/ebtables.h 1969-12-31 19:00:00.000000000 -0500 -+++ linux/include/linux/netfilter_bridge/ebtables.h 2004-07-10 23:46:39.000000000 -0400 -@@ -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, 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 -diff -Nurb linux.stock/include/linux/netfilter_bridge.h linux/include/linux/netfilter_bridge.h ---- linux.stock/include/linux/netfilter_bridge.h 2003-07-04 04:12:26.000000000 -0400 -+++ linux/include/linux/netfilter_bridge.h 2004-07-10 23:46:39.000000000 -0400 -@@ -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); -+} +--- linux-2.4.21/net/core/dev.c Fri Jun 13 16:51:39 2003 ++++ linux-2.4.21-ebt-brnf-3/net/core/dev.c Fri Aug 8 01:10:03 2003 +@@ -1424,7 +1424,7 @@ static void net_tx_action(struct softirq -+struct bridge_skb_cb { -+ union { -+ __u32 ipv4; -+ } daddr; -+}; -+#endif /* CONFIG_NETFILTER */ -+#endif /* __KERNEL__ */ - #endif -diff -Nurb linux.stock/include/linux/netfilter_ipv4/ipt_physdev.h linux/include/linux/netfilter_ipv4/ipt_physdev.h ---- linux.stock/include/linux/netfilter_ipv4/ipt_physdev.h 1969-12-31 19:00:00.000000000 -0500 -+++ linux/include/linux/netfilter_ipv4/ipt_physdev.h 2004-07-10 23:46:39.000000000 -0400 -@@ -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*/ -diff -Nurb linux.stock/include/linux/netfilter_ipv4.h linux/include/linux/netfilter_ipv4.h ---- linux.stock/include/linux/netfilter_ipv4.h 2004-07-10 23:30:09.000000000 -0400 -+++ linux/include/linux/netfilter_ipv4.h 2004-07-10 23:46:39.000000000 -0400 -@@ -54,8 +54,10 @@ - NF_IP_PRI_CONNTRACK_DEFRAG = -400, - NF_IP_PRI_RAW = -300, - 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, -diff -Nurb linux.stock/include/linux/skbuff.h linux/include/linux/skbuff.h ---- linux.stock/include/linux/skbuff.h 2003-07-04 04:12:26.000000000 -0400 -+++ linux/include/linux/skbuff.h 2004-07-10 23:46:39.000000000 -0400 -@@ -92,6 +92,20 @@ - 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 -+ + #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 - struct sk_buff_head { -@@ -204,6 +218,9 @@ - #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*/ + static __inline__ int handle_bridge(struct sk_buff *skb, +@@ -1441,7 +1441,6 @@ static __inline__ int handle_bridge(stru + } + } - #if defined(CONFIG_HIPPI) -@@ -1143,6 +1160,20 @@ - if (nfct) - atomic_inc(&nfct->master->use); +- br_handle_frame_hook(skb); + return ret; } + +@@ -1497,11 +1496,16 @@ int netif_receive_skb(struct sk_buff *sk + if (skb->dev->divert && skb->dev->divert->divert) + ret = handle_diverter(skb); + #endif /* CONFIG_NET_DIVERT */ +- + -+#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) -+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 + #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) + if (skb->dev->br_port != NULL && +- br_handle_frame_hook != NULL) { +- return handle_bridge(skb, pt_prev); ++ br_handle_frame_hook != NULL) { ++ int ret; + ++ ret = handle_bridge(skb, pt_prev); ++ if (br_handle_frame_hook(skb) == 0) ++ return ret; ++ pt_prev = NULL; + } #endif - #endif /* __KERNEL__ */ -diff -Nurb linux.stock/include/linux/sysctl.h linux/include/linux/sysctl.h ---- linux.stock/include/linux/sysctl.h 2004-07-10 23:29:55.000000000 -0400 -+++ linux/include/linux/sysctl.h 2004-07-10 23:46:39.000000000 -0400 -@@ -547,6 +547,15 @@ - 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, -+}; -+ +@@ -1897,7 +1901,7 @@ static int dev_proc_stats(char *buffer, + * are adjusted, %RTM_NEWLINK is sent to the routing socket and the + * function returns zero. + */ +- + - /* CTL_PROC names: */ + int netdev_set_master(struct net_device *slave, struct net_device *master) + { + struct net_device *old = slave->master; +--- linux-2.4.21/net/bridge/br_input.c Sat Aug 3 02:39:46 2002 ++++ linux-2.4.21-ebt-brnf-3/net/bridge/br_input.c Fri Aug 8 01:09:06 2003 +@@ -24,6 +24,9 @@ unsigned char bridge_ula[6] = { 0x01, 0x - /* CTL_FS names: */ -diff -Nurb linux.stock/net/8021q/vlan_dev.c linux/net/8021q/vlan_dev.c ---- linux.stock/net/8021q/vlan_dev.c 2003-07-04 04:12:29.000000000 -0400 -+++ linux/net/8021q/vlan_dev.c 2004-07-10 23:46:39.000000000 -0400 -@@ -503,6 +503,10 @@ - stats->tx_packets++; /* for statics only */ - stats->tx_bytes += skb->len; + static int br_pass_frame_up_finish(struct sk_buff *skb) + { ++#ifdef CONFIG_NETFILTER_DEBUG ++ skb->nf_debug = 0; ++#endif + netif_rx(skb); -+ skb->protocol = __constant_htons(ETH_P_8021Q); -+ skb->mac.raw -= VLAN_HLEN; -+ skb->nh.raw -= VLAN_HLEN; -+ - dev_queue_xmit(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; -diff -Nurb linux.stock/net/Config.in linux/net/Config.in ---- linux.stock/net/Config.in 2004-07-10 23:29:49.000000000 -0400 -+++ linux/net/Config.in 2004-07-10 23:46:39.000000000 -0400 -@@ -68,6 +68,9 @@ - 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 -diff -Nurb linux.stock/net/Makefile linux/net/Makefile ---- linux.stock/net/Makefile 2004-07-10 23:29:49.000000000 -0400 -+++ linux/net/Makefile 2004-07-10 23:49:10.000000000 -0400 -@@ -26,6 +26,12 @@ - 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 -diff -Nurb linux.stock/net/bridge/Makefile linux/net/bridge/Makefile ---- linux.stock/net/bridge/Makefile 2003-07-04 04:12:30.000000000 -0400 -+++ linux/net/bridge/Makefile 2004-07-10 23:46:39.000000000 -0400 -@@ -7,10 +7,17 @@ - # - # Note 2! The CFLAGS definition is now in the main makefile... +-void br_handle_frame(struct sk_buff *skb) ++int br_handle_frame(struct sk_buff *skb) + { + struct net_bridge *br; + unsigned char *dest; +@@ -146,25 +149,35 @@ void br_handle_frame(struct sk_buff *skb + goto handle_special_frame; -+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 + if (p->state == BR_STATE_FORWARDING) { + -+ifeq ($(CONFIG_NETFILTER),y) -+obj-y += br_netfilter.o -+endif ++ if (br_should_route_hook && br_should_route_hook(&skb)) { ++ read_unlock(&br->lock); ++ return -1; ++ } + - obj-m := $(O_TARGET) - - include $(TOPDIR)/Rules.make -diff -Nurb linux.stock/net/bridge/br.c linux/net/bridge/br.c ---- linux.stock/net/bridge/br.c 2003-10-14 04:09:32.000000000 -0400 -+++ linux/net/bridge/br.c 2004-07-10 23:46:39.000000000 -0400 -@@ -29,6 +29,8 @@ - #include "../atm/lec.h" - #endif - -+int (*br_should_route_hook) (struct sk_buff **pskb) = NULL; ++ if (!memcmp(p->br->dev.dev_addr, dest, ETH_ALEN)) ++ skb->pkt_type = PACKET_HOST; + - void br_dec_use_count() - { - MOD_DEC_USE_COUNT; -@@ -43,6 +45,10 @@ - { - printk(KERN_INFO "NET4: Ethernet Bridge 008 for NET4.0\n"); + NF_HOOK(PF_BRIDGE, NF_BR_PRE_ROUTING, skb, skb->dev, NULL, + br_handle_frame_finish); + read_unlock(&br->lock); +- return; ++ return 0; + } -+#ifdef CONFIG_NETFILTER -+ if (br_netfilter_init()) -+ return 1; -+#endif - br_handle_frame_hook = br_handle_frame; - br_ioctl_hook = br_ioctl_deviceless_stub; - #if defined(CONFIG_ATM_LANE) || defined(CONFIG_ATM_LANE_MODULE) -@@ -61,6 +67,9 @@ + err: + read_unlock(&br->lock); + err_nolock: + kfree_skb(skb); +- return; ++ return 0; - static void __exit br_deinit(void) - { -+#ifdef CONFIG_NETFILTER -+ br_netfilter_fini(); -+#endif - unregister_netdevice_notifier(&br_device_notifier); - br_call_ioctl_atomic(__br_clear_ioctl_hook); + handle_special_frame: + if (!dest[5]) { + br_stp_handle_bpdu(skb); + read_unlock(&br->lock); +- return; ++ return 0; + } -@@ -74,7 +83,7 @@ - #endif + read_unlock(&br->lock); + kfree_skb(skb); ++ return 0; } - --EXPORT_NO_SYMBOLS; -+EXPORT_SYMBOL(br_should_route_hook); - - module_init(br_init) - module_exit(br_deinit) -diff -Nurb linux.stock/net/bridge/br_forward.c linux/net/bridge/br_forward.c ---- linux.stock/net/bridge/br_forward.c 2003-10-14 04:09:32.000000000 -0400 -+++ linux/net/bridge/br_forward.c 2004-07-10 23:46:39.000000000 -0400 -@@ -30,18 +30,21 @@ +--- linux-2.4.21/net/bridge/br_forward.c Sat Aug 3 02:39:46 2002 ++++ linux-2.4.21-ebt-brnf-3/net/bridge/br_forward.c Fri Aug 8 01:09:06 2003 +@@ -30,18 +30,22 @@ static inline int should_deliver(struct return 1; } @@ -1166,7 +171,8 @@ diff -Nurb linux.stock/net/bridge/br_forward.c linux/net/bridge/br_forward.c +int br_dev_queue_push_xmit(struct sk_buff *skb) { +#ifdef CONFIG_NETFILTER -+ nf_bridge_maybe_copy_header(skb); ++ if (skb->nf_bridge) ++ memcpy(skb->data - 16, skb->nf_bridge->hh, 16); +#endif skb_push(skb, ETH_HLEN); dev_queue_xmit(skb); @@ -1183,7 +189,7 @@ diff -Nurb linux.stock/net/bridge/br_forward.c linux/net/bridge/br_forward.c return 0; } -@@ -49,8 +52,11 @@ +@@ -49,8 +53,11 @@ static int __br_forward_finish(struct sk static void __br_deliver(struct net_bridge_port *to, struct sk_buff *skb) { skb->dev = to->dev; @@ -1196,7 +202,7 @@ diff -Nurb linux.stock/net/bridge/br_forward.c linux/net/bridge/br_forward.c } static void __br_forward(struct net_bridge_port *to, struct sk_buff *skb) -@@ -61,7 +67,7 @@ +@@ -61,7 +68,7 @@ static void __br_forward(struct net_brid skb->dev = to->dev; NF_HOOK(PF_BRIDGE, NF_BR_FORWARD, skb, indev, skb->dev, @@ -1205,1040 +211,176 @@ diff -Nurb linux.stock/net/bridge/br_forward.c linux/net/bridge/br_forward.c } /* called under bridge lock */ -diff -Nurb linux.stock/net/bridge/br_input.c linux/net/bridge/br_input.c ---- linux.stock/net/bridge/br_input.c 2003-10-14 04:09:32.000000000 -0400 -+++ linux/net/bridge/br_input.c 2004-07-10 23:48:36.000000000 -0400 -@@ -24,6 +24,9 @@ +--- linux-2.4.21/net/bridge/br.c Fri Nov 29 00:53:15 2002 ++++ linux-2.4.21-ebt-brnf-3/net/bridge/br.c Fri Aug 8 01:09:06 2003 +@@ -29,6 +29,8 @@ + #include "../atm/lec.h" + #endif - static int br_pass_frame_up_finish(struct sk_buff *skb) ++int (*br_should_route_hook) (struct sk_buff **pskb) = NULL; ++ + void br_dec_use_count() { -+#ifdef CONFIG_NETFILTER_DEBUG -+ skb->nf_debug = 0; -+#endif - netif_rx(skb); - - return 0; -@@ -46,7 +49,7 @@ - br_pass_frame_up_finish); - } - --static int br_handle_frame_finish(struct sk_buff *skb) -+int br_handle_frame_finish(struct sk_buff *skb) + MOD_DEC_USE_COUNT; +@@ -43,6 +45,10 @@ static int __init br_init(void) { - struct net_bridge *br; - unsigned char *dest; -@@ -112,7 +115,7 @@ - return 0; - } + printk(KERN_INFO "NET4: Ethernet Bridge 008 for NET4.0\n"); --void br_handle_frame(struct sk_buff *skb) -+int br_handle_frame(struct sk_buff *skb) ++#ifdef CONFIG_NETFILTER ++ if (br_netfilter_init()) ++ return 1; ++#endif + br_handle_frame_hook = br_handle_frame; + br_ioctl_hook = br_ioctl_deviceless_stub; + #if defined(CONFIG_ATM_LANE) || defined(CONFIG_ATM_LANE_MODULE) +@@ -61,6 +67,9 @@ static void __br_clear_ioctl_hook(void) + + static void __exit br_deinit(void) { - struct net_bridge *br; - unsigned char *dest; -@@ -146,25 +149,34 @@ - goto handle_special_frame; ++#ifdef CONFIG_NETFILTER ++ br_netfilter_fini(); ++#endif + unregister_netdevice_notifier(&br_device_notifier); + br_call_ioctl_atomic(__br_clear_ioctl_hook); - 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; - } +@@ -74,7 +83,7 @@ static void __exit br_deinit(void) + #endif + } - err: - read_unlock(&br->lock); - err_nolock: - kfree_skb(skb); -- return; -+ return 0; +-EXPORT_NO_SYMBOLS; ++EXPORT_SYMBOL(br_should_route_hook); - handle_special_frame: - if (!dest[5]) { - br_stp_handle_bpdu(skb); - read_unlock(&br->lock); -- return; -+ return 0; - } + module_init(br_init) + module_exit(br_deinit) +--- linux-2.4.21/net/bridge/Makefile Fri Dec 29 23:07:24 2000 ++++ linux-2.4.21-ebt-brnf-3/net/bridge/Makefile Fri Aug 8 01:09:06 2003 +@@ -7,10 +7,17 @@ + # + # Note 2! The CFLAGS definition is now in the main makefile... - read_unlock(&br->lock); - kfree_skb(skb); -+ return 0; - } -diff -Nurb linux.stock/net/bridge/br_netfilter.c linux/net/bridge/br_netfilter.c ---- linux.stock/net/bridge/br_netfilter.c 1969-12-31 19:00:00.000000000 -0500 -+++ linux/net/bridge/br_netfilter.c 2004-07-10 23:46:39.000000000 -0400 -@@ -0,0 +1,896 @@ -+/* -+ * 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) -+ * -+ * 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/in_route.h> -+#include <net/ip.h> -+#include <asm/uaccess.h> -+#include <asm/checksum.h> -+#include "br_private.h" -+#ifdef CONFIG_SYSCTL -+#include <linux/sysctl.h> -+#endif -+ ++export-objs := br.o + -+#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) + 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 + -+#define has_bridge_parent(device) ((device)->br_port != NULL) -+#define bridge_parent(device) (&((device)->br_port->br->dev)) ++ifeq ($(CONFIG_NETFILTER),y) ++obj-y += br_netfilter.o ++endif + -+#ifdef CONFIG_SYSCTL -+static struct ctl_table_header *brnf_sysctl_header; -+static int brnf_call_iptables = 1; -+static int brnf_call_arptables = 1; -+static int brnf_filter_vlan_tagged = 1; -+#else -+#define brnf_filter_vlan_tagged 1 + obj-m := $(O_TARGET) + + include $(TOPDIR)/Rules.make +--- linux-2.4.21/include/linux/netfilter_bridge.h Tue Jun 12 04:15:27 2001 ++++ linux-2.4.21-ebt-brnf-3/include/linux/netfilter_bridge.h Fri Aug 8 01:09:06 2003 +@@ -1,11 +1,14 @@ + #ifndef __LINUX_BRIDGE_NETFILTER_H + #define __LINUX_BRIDGE_NETFILTER_H + +-/* bridge-specific defines for netfilter. ++/* bridge-specific defines for netfilter. + */ + + #include <linux/config.h> + #include <linux/netfilter.h> ++#if defined(__KERNEL__) && defined(CONFIG_NETFILTER) ++#include <asm/atomic.h> +#endif + + /* Bridge Hooks */ + /* After promisc drops, checksum checks. */ +@@ -18,7 +21,49 @@ + #define NF_BR_LOCAL_OUT 3 + /* Packets about to hit the wire. */ + #define NF_BR_POST_ROUTING 4 +-#define NF_BR_NUMHOOKS 5 ++/* Not really a hook, but used for the ebtables broute table */ ++#define NF_BR_BROUTING 5 ++#define NF_BR_NUMHOOKS 6 + ++#ifdef __KERNEL__ + ++#define BRNF_PKT_TYPE 0x01 ++#define BRNF_BRIDGED_DNAT 0x02 ++#define BRNF_DONT_TAKE_PARENT 0x04 ++#define BRNF_BRIDGED 0x08 + -+#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_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 ++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, +}; + -+ -+/* PF_BRIDGE/PRE_ROUTING *********************************************/ -+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; -+} -+ -+/* 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; -+ -+#ifdef CONFIG_SYSCTL -+ if (!brnf_call_iptables) -+ return NF_ACCEPT; -+#endif -+ -+ if (skb->protocol != __constant_htons(ETH_P_IP)) { -+ struct vlan_ethhdr *hdr = (struct vlan_ethhdr *) -+ ((*pskb)->mac.ethernet); -+ -+ if (!IS_VLAN_IP) -+ return NF_ACCEPT; -+ if ((skb = skb_share_check(*pskb, GFP_ATOMIC)) == NULL) -+ goto out; -+ skb_pull(*pskb, VLAN_HLEN); -+ (*pskb)->nh.raw += VLAN_HLEN; -+ } else if ((skb = skb_share_check(*pskb, GFP_ATOMIC)) == NULL) -+ goto out; -+ -+ if (!pskb_may_pull(skb, sizeof(struct iphdr))) -+ goto inhdr_error; -+ -+ iph = skb->nh.iph; -+ if (iph->ihl < 5 || iph->version != 4) -+ goto inhdr_error; -+ -+ if (!pskb_may_pull(skb, 4*iph->ihl)) -+ goto inhdr_error; -+ -+ iph = skb->nh.iph; -+ if (ip_fast_csum((__u8 *)iph, iph->ihl) != 0) -+ goto inhdr_error; -+ -+ len = ntohs(iph->tot_len); -+ if (skb->len < len || len < 4*iph->ihl) -+ goto inhdr_error; -+ -+ if (skb->len > len) { -+ __pskb_trim(skb, len); -+ if (skb->ip_summed == CHECKSUM_HW) -+ skb->ip_summed = CHECKSUM_NONE; -+ } -+ -+#ifdef CONFIG_NETFILTER_DEBUG -+ skb->nf_debug ^= (1 << NF_IP_PRE_ROUTING); -+#endif -+ if ((nf_bridge = nf_bridge_alloc(skb)) == NULL) -+ return NF_DROP; -+ -+ if (skb->pkt_type == PACKET_OTHERHOST) { -+ skb->pkt_type = PACKET_HOST; -+ nf_bridge->mask |= BRNF_PKT_TYPE; -+ } -+ -+ nf_bridge->mask |= BRNF_NF_BRIDGE_PREROUTING; -+ nf_bridge->physindev = skb->dev; -+ skb->dev = bridge_parent(skb->dev); -+ store_orig_dstaddr(skb); -+ -+ NF_HOOK(PF_INET, NF_IP_PRE_ROUTING, skb, skb->dev, NULL, -+ br_nf_pre_routing_finish); -+ -+ return NF_STOLEN; -+ -+inhdr_error: -+// IP_INC_STATS_BH(IpInHdrErrors); -+out: -+ return NF_DROP; -+} -+ -+ -+/* PF_BRIDGE/LOCAL_IN ************************************************/ -+/* The packet is locally destined, which requires a real -+ * dst_entry, so detach the fake one. On the way up, the -+ * packet would pass through PRE_ROUTING again (which already -+ * took place when the packet entered the bridge), but we -+ * register an IPv4 PRE_ROUTING 'sabotage' hook that will -+ * prevent this from happening. -+ */ -+static unsigned int br_nf_local_in(unsigned int hook, struct sk_buff **pskb, -+ const struct net_device *in, const struct net_device *out, -+ int (*okfn)(struct sk_buff *)) -+{ -+ struct sk_buff *skb = *pskb; -+ -+ if (skb->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_IP) || IS_VLAN_IP) { -+ 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); -+ -+#ifdef CONFIG_SYSCTL -+ if (!skb->nf_bridge) -+ return NF_ACCEPT; -+#endif -+ -+ if (skb->protocol != __constant_htons(ETH_P_IP)) { -+ if (!IS_VLAN_IP) -+ 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 -+ 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_INET, 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 *)) -+{ -+ int (*okfn)(struct sk_buff *skb); -+ struct net_device *realindev; -+ struct sk_buff *skb = *pskb; -+ struct nf_bridge_info *nf_bridge; -+ struct vlan_ethhdr *hdr = (struct vlan_ethhdr *)(skb->mac.ethernet); -+ -+#ifdef CONFIG_SYSCTL -+ if (!skb->nf_bridge) -+ return NF_ACCEPT; -+#endif -+ -+ if (skb->protocol != __constant_htons(ETH_P_IP) && !IS_VLAN_IP) -+ return NF_ACCEPT; -+ -+ /* Sometimes we get packets with NULL ->dst here (for example, -+ * running a dhcp client daemon triggers this). -+ */ -+ if (skb->dst == NULL) -+ return NF_ACCEPT; -+ -+ nf_bridge = skb->nf_bridge; -+ nf_bridge->physoutdev = skb->dev; -+ realindev = nf_bridge->physindev; -+ -+ /* Bridged, take PF_BRIDGE/FORWARD. -+ * (see big note in front of br_nf_pre_routing_finish) -+ */ -+ if (nf_bridge->mask & BRNF_BRIDGED_DNAT) { -+ okfn = br_forward_finish; -+ -+ if (nf_bridge->mask & BRNF_PKT_TYPE) { -+ skb->pkt_type = PACKET_OTHERHOST; -+ nf_bridge->mask ^= BRNF_PKT_TYPE; -+ } -+ 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, okfn); -+ } else { -+ struct net_device *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 -+ okfn = br_nf_local_out_finish; -+ 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_INET, 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_INET, NF_IP_LOCAL_OUT, skb, realindev, -+ realoutdev, okfn, -+ NF_IP_PRI_BRIDGE_SABOTAGE_LOCAL_OUT + 1); -+ } -+ } -+ -+ return NF_STOLEN; -+} -+ -+ -+/* PF_BRIDGE/POST_ROUTING ********************************************/ -+static unsigned int br_nf_post_routing(unsigned int hook, struct sk_buff **pskb, -+ const struct net_device *in, const struct net_device *out, -+ int (*okfn)(struct sk_buff *)) -+{ -+ struct sk_buff *skb = *pskb; -+ struct nf_bridge_info *nf_bridge = (*pskb)->nf_bridge; -+ struct vlan_ethhdr *hdr = (struct vlan_ethhdr *)(skb->mac.ethernet); -+ struct net_device *realoutdev = bridge_parent(skb->dev); -+ -+#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 -+ -+#ifdef CONFIG_SYSCTL -+ if (!nf_bridge) -+ return NF_ACCEPT; -+#endif -+ -+ if (skb->protocol != __constant_htons(ETH_P_IP) && !IS_VLAN_IP) -+ return NF_ACCEPT; -+ -+ /* Sometimes we get packets with NULL ->dst here (for example, -+ * running a dhcp client daemon triggers this). -+ */ -+ if (skb->dst == NULL) -+ return NF_ACCEPT; -+ -+#ifdef CONFIG_NETFILTER_DEBUG -+ /* 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_INET, 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 ipv4_sabotage_in(unsigned int hook, struct sk_buff **pskb, -+ const struct net_device *in, const struct net_device *out, -+ int (*okfn)(struct sk_buff *)) -+{ -+ if ((*pskb)->nf_bridge && -+ !((*pskb)->nf_bridge->mask & BRNF_NF_BRIDGE_PREROUTING)) { -+ okfn(*pskb); -+ return NF_STOLEN; -+ } -+ -+ return NF_ACCEPT; -+} -+ -+/* Postpone execution of PF_INET/FORWARD, PF_INET/LOCAL_OUT -+ * and PF_INET/POST_ROUTING until we have done the forwarding -+ * decision in the bridge code and have determined skb->physoutdev. -+ */ -+static unsigned int ipv4_sabotage_out(unsigned int hook, struct sk_buff **pskb, -+ const struct net_device *in, const struct net_device *out, -+ int (*okfn)(struct sk_buff *)) ++#ifdef CONFIG_NETFILTER ++static inline ++struct nf_bridge_info *nf_bridge_alloc(struct sk_buff *skb) +{ -+ struct sk_buff *skb = *pskb; -+ -+#ifdef CONFIG_SYSCTL -+ if (!brnf_call_iptables && !skb->nf_bridge) -+ return NF_ACCEPT; -+#endif -+ -+ 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 && !nf_bridge_alloc(skb)) -+ return NF_DROP; -+ -+ nf_bridge = skb->nf_bridge; ++ struct nf_bridge_info **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 -+ okfn(skb); -+ return NF_STOLEN; ++ if ((*nf_bridge = kmalloc(sizeof(**nf_bridge), GFP_ATOMIC)) != NULL) { ++ atomic_set(&(*nf_bridge)->use, 1); ++ (*nf_bridge)->mask = 0; ++ (*nf_bridge)->physindev = (*nf_bridge)->physoutdev = NULL; + } + -+ return NF_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 = ipv4_sabotage_in, -+ .pf = PF_INET, -+ .hooknum = NF_IP_PRE_ROUTING, -+ .priority = NF_IP_PRI_FIRST, }, -+ { .hook = ipv4_sabotage_out, -+ .pf = PF_INET, -+ .hooknum = NF_IP_FORWARD, -+ .priority = NF_IP_PRI_BRIDGE_SABOTAGE_FORWARD, }, -+ { .hook = ipv4_sabotage_out, -+ .pf = PF_INET, -+ .hooknum = NF_IP_LOCAL_OUT, -+ .priority = NF_IP_PRI_BRIDGE_SABOTAGE_LOCAL_OUT, }, -+ { .hook = ipv4_sabotage_out, -+ .pf = PF_INET, -+ .hooknum = NF_IP_POST_ROUTING, -+ .priority = NF_IP_PRI_FIRST, }, -+}; -+ -+#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; ++ return *nf_bridge; +} + -+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_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 } ++struct bridge_skb_cb { ++ union { ++ __u32 ipv4; ++ } daddr; +}; -+#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 ++#endif /* CONFIG_NETFILTER */ + -+} -diff -Nurb linux.stock/net/bridge/br_private.h linux/net/bridge/br_private.h ---- linux.stock/net/bridge/br_private.h 2003-10-14 04:09:32.000000000 -0400 -+++ linux/net/bridge/br_private.h 2004-07-10 23:46:39.000000000 -0400 -@@ -145,8 +145,10 @@ - /* 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); -@@ -167,7 +169,8 @@ - int *ifindices); ++#endif /* __KERNEL__ */ + #endif +--- linux-2.4.21/net/Makefile Sat Aug 3 02:39:46 2002 ++++ linux-2.4.21-ebt-brnf-3/net/Makefile Fri Aug 8 01:09:06 2003 +@@ -7,7 +7,8 @@ - /* 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); + O_TARGET := network.o - /* br_ioctl.c */ - extern void br_call_ioctl_atomic(void (*fn)(void)); -@@ -178,6 +181,10 @@ - unsigned long arg2); - extern int br_ioctl_deviceless_stub(unsigned long arg); +-mod-subdirs := ipv4/netfilter ipv6/netfilter ipx irda bluetooth atm netlink sched core ++mod-subdirs := ipv4/netfilter ipv6/netfilter bridge/netfilter ipx irda \ ++ bluetooth atm netlink sched core + export-objs := netsyms.o -+/* br_netfilter.c */ -+extern int br_netfilter_init(void); -+extern void br_netfilter_fini(void); + subdir-y := core ethernet +@@ -23,6 +24,12 @@ subdir-$(CONFIG_IPV6) += ipv6 + ifneq ($(CONFIG_IPV6),n) + ifneq ($(CONFIG_IPV6),) + subdir-$(CONFIG_NETFILTER) += ipv6/netfilter ++endif ++endif + - /* 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, -diff -Nurb linux.stock/net/bridge/netfilter/Config.in linux/net/bridge/netfilter/Config.in ---- linux.stock/net/bridge/netfilter/Config.in 1969-12-31 19:00:00.000000000 -0500 -+++ linux/net/bridge/netfilter/Config.in 2004-07-10 23:46:39.000000000 -0400 -@@ -0,0 +1,22 @@ -+# -+# Bridge netfilter configuration -+# -+dep_tristate ' Bridge: ebtables' CONFIG_BRIDGE_NF_EBTABLES $CONFIG_BRIDGE -+dep_tristate ' ebt: filter table support' CONFIG_BRIDGE_EBT_T_FILTER $CONFIG_BRIDGE_NF_EBTABLES -+dep_tristate ' ebt: nat table support' CONFIG_BRIDGE_EBT_T_NAT $CONFIG_BRIDGE_NF_EBTABLES -+dep_tristate ' ebt: broute table support' CONFIG_BRIDGE_EBT_BROUTE $CONFIG_BRIDGE_NF_EBTABLES -+dep_tristate ' ebt: log support' CONFIG_BRIDGE_EBT_LOG $CONFIG_BRIDGE_NF_EBTABLES -+dep_tristate ' ebt: IP filter support' CONFIG_BRIDGE_EBT_IPF $CONFIG_BRIDGE_NF_EBTABLES -+dep_tristate ' ebt: ARP filter support' CONFIG_BRIDGE_EBT_ARPF $CONFIG_BRIDGE_NF_EBTABLES -+dep_tristate ' ebt: 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 $CONFIG_BRIDGE_NF_EBTABLES -diff -Nurb linux.stock/net/bridge/netfilter/Makefile linux/net/bridge/netfilter/Makefile ---- linux.stock/net/bridge/netfilter/Makefile 1969-12-31 19:00:00.000000000 -0500 -+++ linux/net/bridge/netfilter/Makefile 2004-07-10 23:46:39.000000000 -0400 -@@ -0,0 +1,33 @@ ++ifneq ($(CONFIG_BRIDGE),n) ++ifneq ($(CONFIG_BRIDGE),) ++subdir-$(CONFIG_BRIDGE) += bridge/netfilter + endif + endif + +--- linux-2.4.21/net/Config.in Sat Aug 3 02:39:46 2002 ++++ linux-2.4.21-ebt-brnf-3/net/Config.in Fri Aug 8 01:09:06 2003 +@@ -65,6 +65,9 @@ if [ "$CONFIG_DECNET" != "n" ]; then + source net/decnet/Config.in + fi + dep_tristate '802.1d Ethernet Bridging' CONFIG_BRIDGE $CONFIG_INET ++if [ "$CONFIG_BRIDGE" != "n" -a "$CONFIG_NETFILTER" != "n" ]; then ++ source net/bridge/netfilter/Config.in ++fi + if [ "$CONFIG_EXPERIMENTAL" = "y" ]; then + tristate 'CCITT X.25 Packet Layer (EXPERIMENTAL)' CONFIG_X25 + tristate 'LAPB Data Link Driver (EXPERIMENTAL)' CONFIG_LAPB +--- /dev/null Thu Aug 24 11:00:32 2000 ++++ linux-2.4.21-ebt-brnf-3/net/bridge/netfilter/Makefile Fri Aug 8 01:09:06 2003 +@@ -0,0 +1,30 @@ +# +# Makefile for the netfilter modules on top of bridging. +# @@ -2256,1028 +398,394 @@ diff -Nurb linux.stock/net/bridge/netfilter/Makefile linux/net/bridge/netfilter/ +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-$(CONFIG_BRIDGE_EBT_ARPF) += ebt_arp.o ++obj-$(CONFIG_BRIDGE_EBT_VLANF) += ebt_vlan.o +obj-$(CONFIG_BRIDGE_EBT_MARKF) += ebt_mark_m.o ++obj-$(CONFIG_BRIDGE_EBT_802_3) += ebt_802_3.o +obj-$(CONFIG_BRIDGE_EBT_PKTTYPE) += ebt_pkttype.o -+obj-$(CONFIG_BRIDGE_EBT_STP) += ebt_stp.o -+obj-$(CONFIG_BRIDGE_EBT_VLANF) += ebt_vlan.o ++obj-$(CONFIG_BRIDGE_EBT_PKTTYPE) += ebt_stp.o +obj-$(CONFIG_BRIDGE_EBT_LOG) += ebt_log.o -+obj-$(CONFIG_BRIDGE_EBT_ARPREPLY) += ebt_arpreply.o ++obj-$(CONFIG_BRIDGE_EBT_SNAT) += ebt_snat.o +obj-$(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-$(CONFIG_BRIDGE_EBT_SNAT) += ebt_snat.o ++obj-$(CONFIG_BRIDGE_EBT_MARK_T) += ebt_mark.o +include $(TOPDIR)/Rules.make -diff -Nurb linux.stock/net/bridge/netfilter/ebt_802_3.c linux/net/bridge/netfilter/ebt_802_3.c ---- linux.stock/net/bridge/netfilter/ebt_802_3.c 1969-12-31 19:00:00.000000000 -0500 -+++ linux/net/bridge/netfilter/ebt_802_3.c 2004-07-10 23:46:39.000000000 -0400 -@@ -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"); -diff -Nurb linux.stock/net/bridge/netfilter/ebt_among.c linux/net/bridge/netfilter/ebt_among.c ---- linux.stock/net/bridge/netfilter/ebt_among.c 1969-12-31 19:00:00.000000000 -0500 -+++ linux/net/bridge/netfilter/ebt_among.c 2004-07-10 23:46:39.000000000 -0400 -@@ -0,0 +1,223 @@ +--- /dev/null Thu Aug 24 11:00:32 2000 ++++ linux-2.4.21-ebt-brnf-3/net/bridge/netfilter/Config.in Fri Aug 8 01:09:06 2003 +@@ -0,0 +1,19 @@ ++# ++# Bridge netfilter configuration ++# ++dep_tristate ' Bridge: ebtables' CONFIG_BRIDGE_NF_EBTABLES $CONFIG_BRIDGE ++dep_tristate ' ebt: filter table support' CONFIG_BRIDGE_EBT_T_FILTER $CONFIG_BRIDGE_NF_EBTABLES ++dep_tristate ' ebt: nat table support' CONFIG_BRIDGE_EBT_T_NAT $CONFIG_BRIDGE_NF_EBTABLES ++dep_tristate ' ebt: broute table support' CONFIG_BRIDGE_EBT_BROUTE $CONFIG_BRIDGE_NF_EBTABLES ++dep_tristate ' ebt: log support' CONFIG_BRIDGE_EBT_LOG $CONFIG_BRIDGE_NF_EBTABLES ++dep_tristate ' ebt: IP filter support' CONFIG_BRIDGE_EBT_IPF $CONFIG_BRIDGE_NF_EBTABLES ++dep_tristate ' ebt: ARP filter support' CONFIG_BRIDGE_EBT_ARPF $CONFIG_BRIDGE_NF_EBTABLES ++dep_tristate ' ebt: 802.1Q VLAN filter support' CONFIG_BRIDGE_EBT_VLANF $CONFIG_BRIDGE_NF_EBTABLES ++dep_tristate ' ebt: 802.3 filter support' CONFIG_BRIDGE_EBT_802_3 $CONFIG_BRIDGE_NF_EBTABLES ++dep_tristate ' ebt: packet type filter support' CONFIG_BRIDGE_EBT_PKTTYPE $CONFIG_BRIDGE_NF_EBTABLES ++dep_tristate ' ebt: STP filter support' CONFIG_BRIDGE_EBT_STP $CONFIG_BRIDGE_NF_EBTABLES ++dep_tristate ' ebt: mark filter support' CONFIG_BRIDGE_EBT_MARKF $CONFIG_BRIDGE_NF_EBTABLES ++dep_tristate ' ebt: snat target support' CONFIG_BRIDGE_EBT_SNAT $CONFIG_BRIDGE_NF_EBTABLES ++dep_tristate ' ebt: dnat target support' CONFIG_BRIDGE_EBT_DNAT $CONFIG_BRIDGE_NF_EBTABLES ++dep_tristate ' ebt: redirect target support' CONFIG_BRIDGE_EBT_REDIRECT $CONFIG_BRIDGE_NF_EBTABLES ++dep_tristate ' ebt: mark target support' CONFIG_BRIDGE_EBT_MARK_T $CONFIG_BRIDGE_NF_EBTABLES +--- /dev/null Thu Aug 24 11:00:32 2000 ++++ linux-2.4.21-ebt-brnf-3/net/bridge/netfilter/ebtable_filter.c Fri Aug 8 01:09:06 2003 +@@ -0,0 +1,90 @@ +/* -+ * ebt_among ++ * ebtable_filter + * + * Authors: -+ * Grzegorz Borowiak <grzes@gnu.univ.gda.pl> ++ * Bart De Schuymer <bart.de.schuymer@pandora.be> + * -+ * August, 2003 ++ * April, 2002 + * + */ + +#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; -+} ++#define FILTER_VALID_HOOKS ((1 << NF_BR_LOCAL_IN) | (1 << NF_BR_FORWARD) | \ ++ (1 << NF_BR_LOCAL_OUT)) + -+static int ebt_mac_wormhash_check_integrity(const struct ebt_mac_wormhash -+ *wh) ++static struct ebt_entries initial_chains[] = +{ -+ 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; -+} ++ {0, "INPUT", 0, EBT_ACCEPT, 0}, ++ {0, "FORWARD", 0, EBT_ACCEPT, 0}, ++ {0, "OUTPUT", 0, EBT_ACCEPT, 0} ++}; + -+static int get_ip_dst(const struct sk_buff *skb, uint32_t * addr) ++static struct ebt_replace initial_table = +{ -+ 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; -+} ++ "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 get_ip_src(const struct sk_buff *skb, uint32_t * addr) ++static int check(const struct ebt_table_info *info, unsigned int valid_hooks) +{ -+ 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)); -+ -+ } ++ if (valid_hooks & ~FILTER_VALID_HOOKS) ++ return -EINVAL; + 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 struct ebt_table frame_filter = ++{ ++ {NULL, NULL}, "filter", &initial_table, FILTER_VALID_HOOKS, ++ RW_LOCK_UNLOCKED, check, NULL ++}; + -+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 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 ebt_match filter_among = { -+ {NULL, NULL}, -+ EBT_AMONG_MATCH, -+ ebt_filter_among, -+ ebt_among_check, -+ NULL, -+ THIS_MODULE ++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) +{ -+ return ebt_register_match(&filter_among); ++ 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) +{ -+ ebt_unregister_match(&filter_among); ++ 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"); -diff -Nurb linux.stock/net/bridge/netfilter/ebt_arp.c linux/net/bridge/netfilter/ebt_arp.c ---- linux.stock/net/bridge/netfilter/ebt_arp.c 1969-12-31 19:00:00.000000000 -0500 -+++ linux/net/bridge/netfilter/ebt_arp.c 2004-07-10 23:46:39.000000000 -0400 -@@ -0,0 +1,149 @@ +--- /dev/null Thu Aug 24 11:00:32 2000 ++++ linux-2.4.21-ebt-brnf-3/net/bridge/netfilter/ebtable_nat.c Fri Aug 8 01:09:06 2003 +@@ -0,0 +1,96 @@ +/* -+ * ebt_arp ++ * ebtable_nat + * + * 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> ++#define NAT_VALID_HOOKS ((1 << NF_BR_PRE_ROUTING) | (1 << NF_BR_LOCAL_OUT) | \ ++ (1 << NF_BR_POST_ROUTING)) + -+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 = ++static struct ebt_entries initial_chains[] = +{ -+ {NULL, NULL}, EBT_ARP_MATCH, ebt_filter_arp, ebt_arp_check, NULL, -+ THIS_MODULE ++ {0, "PREROUTING", 0, EBT_ACCEPT, 0}, ++ {0, "OUTPUT", 0, EBT_ACCEPT, 0}, ++ {0, "POSTROUTING", 0, EBT_ACCEPT, 0} +}; + -+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"); -diff -Nurb linux.stock/net/bridge/netfilter/ebt_arpreply.c linux/net/bridge/netfilter/ebt_arpreply.c ---- linux.stock/net/bridge/netfilter/ebt_arpreply.c 1969-12-31 19:00:00.000000000 -0500 -+++ linux/net/bridge/netfilter/ebt_arpreply.c 2004-07-10 23:46:39.000000000 -0400 -@@ -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) ++static struct ebt_replace initial_table = +{ -+ 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; -+} ++ "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 ebt_target_reply_check(const char *tablename, unsigned int hookmask, -+ const struct ebt_entry *e, void *data, unsigned int datalen) ++static int check(const struct ebt_table_info *info, unsigned int valid_hooks) +{ -+ 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)) ++ if (valid_hooks & ~NAT_VALID_HOOKS) + return -EINVAL; + return 0; +} + -+static struct ebt_target reply_target = ++static struct ebt_table frame_nat = +{ -+ .name = EBT_ARPREPLY_TARGET, -+ .target = ebt_target_reply, -+ .check = ebt_target_reply_check, -+ .me = THIS_MODULE, ++ {NULL, NULL}, "nat", &initial_table, NAT_VALID_HOOKS, ++ RW_LOCK_UNLOCKED, check, NULL +}; + -+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"); -diff -Nurb linux.stock/net/bridge/netfilter/ebt_dnat.c linux/net/bridge/netfilter/ebt_dnat.c ---- linux.stock/net/bridge/netfilter/ebt_dnat.c 1969-12-31 19:00:00.000000000 -0500 -+++ linux/net/bridge/netfilter/ebt_dnat.c 2004-07-10 23:46:39.000000000 -0400 -@@ -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) ++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 *)) +{ -+ 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; ++ return ebt_do_table(hook, pskb, in, out, &frame_nat); +} + -+static int ebt_target_dnat_check(const char *tablename, unsigned int hookmask, -+ const struct ebt_entry *e, void *data, unsigned int datalen) ++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 *)) +{ -+ 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; ++ return ebt_do_table(hook, pskb, in, out, &frame_nat); +} + -+static struct ebt_target dnat = -+{ -+ {NULL, NULL}, EBT_DNAT_TARGET, ebt_target_dnat, ebt_target_dnat_check, -+ NULL, THIS_MODULE ++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) +{ -+ return ebt_register_target(&dnat); ++ 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) +{ -+ ebt_unregister_target(&dnat); ++ 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"); -diff -Nurb linux.stock/net/bridge/netfilter/ebt_ip.c linux/net/bridge/netfilter/ebt_ip.c ---- linux.stock/net/bridge/netfilter/ebt_ip.c 1969-12-31 19:00:00.000000000 -0500 -+++ linux/net/bridge/netfilter/ebt_ip.c 2004-07-10 23:46:39.000000000 -0400 -@@ -0,0 +1,121 @@ +--- /dev/null Thu Aug 24 11:00:32 2000 ++++ linux-2.4.21-ebt-brnf-3/net/bridge/netfilter/ebtable_broute.c Fri Aug 8 01:09:06 2003 +@@ -0,0 +1,79 @@ +/* -+ * ebt_ip ++ * ebtable_broute + * + * 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 ++ * 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/netfilter_bridge/ebt_ip.h> -+#include <linux/ip.h> -+#include <linux/in.h> +#include <linux/module.h> ++#include <linux/if_bridge.h> ++#include <linux/brlock.h> + -+struct tcpudphdr { -+ uint16_t src; -+ uint16_t dst; -+}; -+ -+union h_u { -+ unsigned char *raw; -+ struct tcpudphdr *tuh; -+}; ++// 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 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) ++static struct ebt_replace initial_table = +{ -+ 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; -+} ++ "broute", 1 << NF_BR_BROUTING, 0, sizeof(struct ebt_entries), ++ { [NF_BR_BROUTING]&initial_chain}, 0, NULL, (char *)&initial_chain ++}; + -+static int ebt_ip_check(const char *tablename, unsigned int hookmask, -+ const struct ebt_entry *e, void *data, unsigned int datalen) ++static int check(const struct ebt_table_info *info, unsigned int valid_hooks) +{ -+ 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]) ++ if (valid_hooks & ~(1 << NF_BR_BROUTING)) + return -EINVAL; + return 0; +} + -+static struct ebt_match filter_ip = ++static struct ebt_table broute_table = +{ -+ {NULL, NULL}, EBT_IP_MATCH, ebt_filter_ip, ebt_ip_check, NULL, -+ THIS_MODULE ++ {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) +{ -+ return ebt_register_match(&filter_ip); ++ 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) +{ -+ ebt_unregister_match(&filter_ip); ++ 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"); -diff -Nurb linux.stock/net/bridge/netfilter/ebt_limit.c linux/net/bridge/netfilter/ebt_limit.c ---- linux.stock/net/bridge/netfilter/ebt_limit.c 1969-12-31 19:00:00.000000000 -0500 -+++ linux/net/bridge/netfilter/ebt_limit.c 2004-07-10 23:46:39.000000000 -0400 -@@ -0,0 +1,101 @@ +--- /dev/null Thu Aug 24 11:00:32 2000 ++++ linux-2.4.21-ebt-brnf-3/net/bridge/netfilter/ebt_802_3.c Fri Aug 8 01:09:06 2003 +@@ -0,0 +1,74 @@ +/* -+ * ebt_limit -+ * -+ * Authors: -+ * Tom Marshall <tommy@home.tig-grr.com> -+ * -+ * Mostly copied from netfilter's ipt_limit.c, see that file for explanation ++ * 802_3 + * -+ * September, 2003 ++ * Author: ++ * Chris Vitale csv@bluetail.com + * ++ * May 2003 ++ * + */ + +#include <linux/netfilter_bridge/ebtables.h> -+#include <linux/netfilter_bridge/ebt_limit.h> ++#include <linux/netfilter_bridge/ebt_802_3.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, ++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_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; ++ 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->credit >= info->cost) { -+ /* We're not limited. */ -+ info->credit -= info->cost; -+ spin_unlock_bh(&limit_lock); -+ return EBT_MATCH; ++ 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; + } + -+ 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; ++ 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; + } + -+ /* 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); ++ return EBT_MATCH; +} + -+module_init(init); -+module_exit(fini); -+EXPORT_NO_SYMBOLS; -+MODULE_LICENSE("GPL"); -diff -Nurb linux.stock/net/bridge/netfilter/ebt_log.c linux/net/bridge/netfilter/ebt_log.c ---- linux.stock/net/bridge/netfilter/ebt_log.c 1969-12-31 19:00:00.000000000 -0500 -+++ linux/net/bridge/netfilter/ebt_log.c 2004-07-10 23:46:39.000000000 -0400 -@@ -0,0 +1,152 @@ -+/* -+ * ebt_log -+ * -+ * Authors: -+ * Bart De Schuymer <bart.de.schuymer@pandora.be> -+ * -+ * April, 2002 -+ * -+ */ -+ -+#include <linux/netfilter_bridge/ebtables.h> -+#include <linux/netfilter_bridge/ebt_log.h> -+#include <linux/module.h> -+#include <linux/ip.h> -+#include <linux/in.h> -+#include <linux/if_arp.h> -+#include <linux/spinlock.h> -+ -+static spinlock_t ebt_log_lock = SPIN_LOCK_UNLOCKED; -+ -+static int ebt_log_check(const char *tablename, unsigned int hookmask, ++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_log_info *info = (struct ebt_log_info *)data; ++ struct ebt_802_3_info *info = (struct ebt_802_3_info *)data; + -+ if (datalen != EBT_ALIGN(sizeof(struct ebt_log_info))) -+ return -EINVAL; -+ if (info->bitmask & ~EBT_LOG_MASK) ++ if (datalen != EBT_ALIGN(sizeof(struct ebt_802_3_info))) + return -EINVAL; -+ if (info->loglevel >= 8) ++ if (info->bitmask & ~EBT_802_3_MASK || info->invflags & ~EBT_802_3_MASK) + return -EINVAL; -+ info->prefix[EBT_LOG_PREFIX_SIZE - 1] = '\0'; -+ return 0; -+} -+ -+struct tcpudphdr -+{ -+ uint16_t src; -+ uint16_t dst; -+}; -+ -+struct arppayload -+{ -+ unsigned char mac_src[ETH_ALEN]; -+ unsigned char ip_src[4]; -+ unsigned char mac_dst[ETH_ALEN]; -+ unsigned char ip_dst[4]; -+}; -+ -+static void print_MAC(unsigned char *p) -+{ -+ int i; -+ -+ for (i = 0; i < ETH_ALEN; i++, p++) -+ printk("%02x%c", *p, i == ETH_ALEN - 1 ? ' ':':'); -+} -+ -+#define myNIPQUAD(a) a[0], a[1], a[2], a[3] -+static void ebt_log(const struct sk_buff *skb, const struct net_device *in, -+ const struct net_device *out, const void *data, unsigned int datalen) -+{ -+ struct ebt_log_info *info = (struct ebt_log_info *)data; -+ char level_string[4] = "< >"; -+ level_string[1] = '0' + info->loglevel; + -+ spin_lock_bh(&ebt_log_lock); -+ printk(level_string); -+ printk("%s IN=%s OUT=%s ", info->prefix, in ? in->name : "", -+ out ? out->name : ""); -+ -+ printk("MAC source = "); -+ print_MAC((skb->mac.ethernet)->h_source); -+ printk("MAC dest = "); -+ print_MAC((skb->mac.ethernet)->h_dest); -+ -+ printk("proto = 0x%04x", ntohs(((*skb).mac.ethernet)->h_proto)); -+ -+ if ((info->bitmask & EBT_LOG_IP) && skb->mac.ethernet->h_proto == -+ htons(ETH_P_IP)){ -+ struct iphdr *iph = skb->nh.iph; -+ printk(" IP SRC=%u.%u.%u.%u IP DST=%u.%u.%u.%u,", -+ NIPQUAD(iph->saddr), NIPQUAD(iph->daddr)); -+ printk(" IP tos=0x%02X, IP proto=%d", iph->tos, iph->protocol); -+ if (iph->protocol == IPPROTO_TCP || -+ iph->protocol == IPPROTO_UDP) { -+ struct tcpudphdr *ports = (struct tcpudphdr *)(skb->data + iph->ihl*4); -+ -+ if (skb->data + iph->ihl*4 > skb->tail) { -+ printk(" INCOMPLETE TCP/UDP header"); -+ goto out; -+ } -+ printk(" SPT=%u DPT=%u", ntohs(ports->src), -+ ntohs(ports->dst)); -+ } -+ goto out; -+ } -+ -+ if ((info->bitmask & EBT_LOG_ARP) && -+ ((skb->mac.ethernet->h_proto == __constant_htons(ETH_P_ARP)) || -+ (skb->mac.ethernet->h_proto == __constant_htons(ETH_P_RARP)))) { -+ struct arphdr * arph = skb->nh.arph; -+ printk(" ARP HTYPE=%d, PTYPE=0x%04x, OPCODE=%d", -+ ntohs(arph->ar_hrd), ntohs(arph->ar_pro), -+ ntohs(arph->ar_op)); -+ /* If it's for Ethernet and the lengths are OK, -+ * then log the ARP payload */ -+ if (arph->ar_hrd == __constant_htons(1) && -+ arph->ar_hln == ETH_ALEN && -+ arph->ar_pln == sizeof(uint32_t)) { -+ struct arppayload *arpp = (struct arppayload *)(skb->data + sizeof(*arph)); -+ -+ if (skb->data + sizeof(*arph) > skb->tail) { -+ printk(" INCOMPLETE ARP header"); -+ goto out; -+ } -+ -+ printk(" ARP MAC SRC="); -+ print_MAC(arpp->mac_src); -+ printk(" ARP IP SRC=%u.%u.%u.%u", -+ myNIPQUAD(arpp->ip_src)); -+ printk(" ARP MAC DST="); -+ print_MAC(arpp->mac_dst); -+ printk(" ARP IP DST=%u.%u.%u.%u", -+ myNIPQUAD(arpp->ip_dst)); -+ } -+ -+ } -+out: -+ printk("\n"); -+ spin_unlock_bh(&ebt_log_lock); ++ return 0; +} + -+static struct ebt_watcher log = ++static struct ebt_match filter_802_3 = +{ -+ {NULL, NULL}, EBT_LOG_WATCHER, ebt_log, ebt_log_check, NULL, -+ THIS_MODULE ++ .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_watcher(&log); ++ return ebt_register_match(&filter_802_3); +} + +static void __exit fini(void) +{ -+ ebt_unregister_watcher(&log); ++ ebt_unregister_match(&filter_802_3); +} + +module_init(init); +module_exit(fini); +EXPORT_NO_SYMBOLS; +MODULE_LICENSE("GPL"); -diff -Nurb linux.stock/net/bridge/netfilter/ebt_mark.c linux/net/bridge/netfilter/ebt_mark.c ---- linux.stock/net/bridge/netfilter/ebt_mark.c 1969-12-31 19:00:00.000000000 -0500 -+++ linux/net/bridge/netfilter/ebt_mark.c 2004-07-10 23:46:39.000000000 -0400 +--- /dev/null Thu Aug 24 11:00:32 2000 ++++ linux-2.4.21-ebt-brnf-3/net/bridge/netfilter/ebt_mark.c Fri Aug 8 01:09:06 2003 @@ -0,0 +1,66 @@ +/* + * ebt_mark @@ -3345,9 +853,8 @@ diff -Nurb linux.stock/net/bridge/netfilter/ebt_mark.c linux/net/bridge/netfilte +module_exit(fini); +EXPORT_NO_SYMBOLS; +MODULE_LICENSE("GPL"); -diff -Nurb linux.stock/net/bridge/netfilter/ebt_mark_m.c linux/net/bridge/netfilter/ebt_mark_m.c ---- linux.stock/net/bridge/netfilter/ebt_mark_m.c 1969-12-31 19:00:00.000000000 -0500 -+++ linux/net/bridge/netfilter/ebt_mark_m.c 2004-07-10 23:46:39.000000000 -0400 +--- /dev/null Thu Aug 24 11:00:32 2000 ++++ linux-2.4.21-ebt-brnf-3/net/bridge/netfilter/ebt_mark_m.c Fri Aug 8 01:09:06 2003 @@ -0,0 +1,61 @@ +/* + * ebt_mark_m @@ -3410,9 +917,8 @@ diff -Nurb linux.stock/net/bridge/netfilter/ebt_mark_m.c linux/net/bridge/netfil +module_exit(fini); +EXPORT_NO_SYMBOLS; +MODULE_LICENSE("GPL"); -diff -Nurb linux.stock/net/bridge/netfilter/ebt_pkttype.c linux/net/bridge/netfilter/ebt_pkttype.c ---- linux.stock/net/bridge/netfilter/ebt_pkttype.c 1969-12-31 19:00:00.000000000 -0500 -+++ linux/net/bridge/netfilter/ebt_pkttype.c 2004-07-10 23:46:39.000000000 -0400 +--- /dev/null Thu Aug 24 11:00:32 2000 ++++ linux-2.4.21-ebt-brnf-3/net/bridge/netfilter/ebt_pkttype.c Fri Aug 8 01:09:06 2003 @@ -0,0 +1,60 @@ +/* + * ebt_pkttype @@ -3474,152 +980,8 @@ diff -Nurb linux.stock/net/bridge/netfilter/ebt_pkttype.c linux/net/bridge/netfi +module_exit(fini); +EXPORT_NO_SYMBOLS; +MODULE_LICENSE("GPL"); -diff -Nurb linux.stock/net/bridge/netfilter/ebt_redirect.c linux/net/bridge/netfilter/ebt_redirect.c ---- linux.stock/net/bridge/netfilter/ebt_redirect.c 1969-12-31 19:00:00.000000000 -0500 -+++ linux/net/bridge/netfilter/ebt_redirect.c 2004-07-10 23:46:39.000000000 -0400 -@@ -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"); -diff -Nurb linux.stock/net/bridge/netfilter/ebt_snat.c linux/net/bridge/netfilter/ebt_snat.c ---- linux.stock/net/bridge/netfilter/ebt_snat.c 1969-12-31 19:00:00.000000000 -0500 -+++ linux/net/bridge/netfilter/ebt_snat.c 2004-07-10 23:46:39.000000000 -0400 -@@ -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"); -diff -Nurb linux.stock/net/bridge/netfilter/ebt_stp.c linux/net/bridge/netfilter/ebt_stp.c ---- linux.stock/net/bridge/netfilter/ebt_stp.c 1969-12-31 19:00:00.000000000 -0500 -+++ linux/net/bridge/netfilter/ebt_stp.c 2004-07-10 23:46:39.000000000 -0400 +--- /dev/null Thu Aug 24 11:00:32 2000 ++++ linux-2.4.21-ebt-brnf-3/net/bridge/netfilter/ebt_stp.c Fri Aug 8 01:09:06 2003 @@ -0,0 +1,191 @@ +/* + * ebt_stp @@ -3812,9 +1174,358 @@ diff -Nurb linux.stock/net/bridge/netfilter/ebt_stp.c linux/net/bridge/netfilter +module_exit(fini); +EXPORT_NO_SYMBOLS; +MODULE_LICENSE("GPL"); -diff -Nurb linux.stock/net/bridge/netfilter/ebt_vlan.c linux/net/bridge/netfilter/ebt_vlan.c ---- linux.stock/net/bridge/netfilter/ebt_vlan.c 1969-12-31 19:00:00.000000000 -0500 -+++ linux/net/bridge/netfilter/ebt_vlan.c 2004-07-10 23:46:39.000000000 -0400 +--- /dev/null Thu Aug 24 11:00:32 2000 ++++ linux-2.4.21-ebt-brnf-3/net/bridge/netfilter/ebt_redirect.c Fri Aug 8 01:09:06 2003 +@@ -0,0 +1,71 @@ ++/* ++ * ebt_redirect ++ * ++ * Authors: ++ * Bart De Schuymer <bart.de.schuymer@pandora.be> ++ * ++ * April, 2002 ++ * ++ */ ++ ++#include <linux/netfilter_bridge/ebtables.h> ++#include <linux/netfilter_bridge/ebt_redirect.h> ++#include <linux/module.h> ++#include <net/sock.h> ++#include "../br_private.h" ++ ++static int ebt_target_redirect(struct sk_buff **pskb, unsigned int hooknr, ++ const struct net_device *in, const struct net_device *out, ++ const void *data, unsigned int datalen) ++{ ++ struct ebt_redirect_info *info = (struct ebt_redirect_info *)data; ++ ++ if (hooknr != NF_BR_BROUTING) ++ memcpy((**pskb).mac.ethernet->h_dest, ++ in->br_port->br->dev.dev_addr, ETH_ALEN); ++ else { ++ memcpy((**pskb).mac.ethernet->h_dest, ++ in->dev_addr, ETH_ALEN); ++ (*pskb)->pkt_type = PACKET_HOST; ++ } ++ return info->target; ++} ++ ++static int ebt_target_redirect_check(const char *tablename, unsigned int hookmask, ++ const struct ebt_entry *e, void *data, unsigned int datalen) ++{ ++ struct ebt_redirect_info *info = (struct ebt_redirect_info *)data; ++ ++ if (datalen != EBT_ALIGN(sizeof(struct ebt_redirect_info))) ++ return -EINVAL; ++ if (BASE_CHAIN && info->target == EBT_RETURN) ++ return -EINVAL; ++ CLEAR_BASE_CHAIN_BIT; ++ if ( (strcmp(tablename, "nat") || hookmask & ~(1 << NF_BR_PRE_ROUTING)) && ++ (strcmp(tablename, "broute") || hookmask & ~(1 << NF_BR_BROUTING)) ) ++ return -EINVAL; ++ if (INVALID_TARGET) ++ return -EINVAL; ++ return 0; ++} ++ ++static struct ebt_target redirect_target = ++{ ++ {NULL, NULL}, EBT_REDIRECT_TARGET, ebt_target_redirect, ++ ebt_target_redirect_check, NULL, THIS_MODULE ++}; ++ ++static int __init init(void) ++{ ++ return ebt_register_target(&redirect_target); ++} ++ ++static void __exit fini(void) ++{ ++ ebt_unregister_target(&redirect_target); ++} ++ ++module_init(init); ++module_exit(fini); ++EXPORT_NO_SYMBOLS; ++MODULE_LICENSE("GPL"); +--- /dev/null Thu Aug 24 11:00:32 2000 ++++ linux-2.4.21-ebt-brnf-3/net/bridge/netfilter/ebt_arp.c Fri Aug 8 01:09:06 2003 +@@ -0,0 +1,149 @@ ++/* ++ * ebt_arp ++ * ++ * Authors: ++ * Bart De Schuymer <bart.de.schuymer@pandora.be> ++ * Tim Gardner <timg@tpi.com> ++ * ++ * April, 2002 ++ * ++ */ ++ ++#include <linux/netfilter_bridge/ebtables.h> ++#include <linux/netfilter_bridge/ebt_arp.h> ++#include <linux/if_arp.h> ++#include <linux/if_ether.h> ++#include <linux/module.h> ++ ++static int ebt_filter_arp(const struct sk_buff *skb, const struct net_device *in, ++ const struct net_device *out, const void *data, unsigned int datalen) ++{ ++ struct ebt_arp_info *info = (struct ebt_arp_info *)data; ++ ++ if (info->bitmask & EBT_ARP_OPCODE && FWINV(info->opcode != ++ ((*skb).nh.arph)->ar_op, EBT_ARP_OPCODE)) ++ return EBT_NOMATCH; ++ if (info->bitmask & EBT_ARP_HTYPE && FWINV(info->htype != ++ ((*skb).nh.arph)->ar_hrd, EBT_ARP_HTYPE)) ++ return EBT_NOMATCH; ++ if (info->bitmask & EBT_ARP_PTYPE && FWINV(info->ptype != ++ ((*skb).nh.arph)->ar_pro, EBT_ARP_PTYPE)) ++ return EBT_NOMATCH; ++ ++ if (info->bitmask & (EBT_ARP_SRC_IP | EBT_ARP_DST_IP)) ++ { ++ uint32_t arp_len = sizeof(struct arphdr) + ++ (2 * (((*skb).nh.arph)->ar_hln)) + ++ (2 * (((*skb).nh.arph)->ar_pln)); ++ uint32_t dst; ++ uint32_t src; ++ ++ // Make sure the packet is long enough. ++ if ((((*skb).nh.raw) + arp_len) > (*skb).tail) ++ return EBT_NOMATCH; ++ // IPv4 addresses are always 4 bytes. ++ if (((*skb).nh.arph)->ar_pln != sizeof(uint32_t)) ++ return EBT_NOMATCH; ++ ++ if (info->bitmask & EBT_ARP_SRC_IP) { ++ memcpy(&src, ((*skb).nh.raw) + sizeof(struct arphdr) + ++ ((*skb).nh.arph)->ar_hln, sizeof(uint32_t)); ++ if (FWINV(info->saddr != (src & info->smsk), ++ EBT_ARP_SRC_IP)) ++ return EBT_NOMATCH; ++ } ++ ++ if (info->bitmask & EBT_ARP_DST_IP) { ++ memcpy(&dst, ((*skb).nh.raw)+sizeof(struct arphdr) + ++ (2*(((*skb).nh.arph)->ar_hln)) + ++ (((*skb).nh.arph)->ar_pln), sizeof(uint32_t)); ++ if (FWINV(info->daddr != (dst & info->dmsk), ++ EBT_ARP_DST_IP)) ++ return EBT_NOMATCH; ++ } ++ } ++ ++ if (info->bitmask & (EBT_ARP_SRC_MAC | EBT_ARP_DST_MAC)) ++ { ++ uint32_t arp_len = sizeof(struct arphdr) + ++ (2 * (((*skb).nh.arph)->ar_hln)) + ++ (2 * (((*skb).nh.arph)->ar_pln)); ++ unsigned char dst[ETH_ALEN]; ++ unsigned char src[ETH_ALEN]; ++ ++ // Make sure the packet is long enough. ++ if ((((*skb).nh.raw) + arp_len) > (*skb).tail) ++ return EBT_NOMATCH; ++ // MAC addresses are 6 bytes. ++ if (((*skb).nh.arph)->ar_hln != ETH_ALEN) ++ return EBT_NOMATCH; ++ if (info->bitmask & EBT_ARP_SRC_MAC) { ++ uint8_t verdict, i; ++ ++ memcpy(&src, ((*skb).nh.raw) + ++ sizeof(struct arphdr), ++ ETH_ALEN); ++ verdict = 0; ++ for (i = 0; i < 6; i++) ++ verdict |= (src[i] ^ info->smaddr[i]) & ++ info->smmsk[i]; ++ if (FWINV(verdict != 0, EBT_ARP_SRC_MAC)) ++ return EBT_NOMATCH; ++ } ++ ++ if (info->bitmask & EBT_ARP_DST_MAC) { ++ uint8_t verdict, i; ++ ++ memcpy(&dst, ((*skb).nh.raw) + ++ sizeof(struct arphdr) + ++ (((*skb).nh.arph)->ar_hln) + ++ (((*skb).nh.arph)->ar_pln), ++ ETH_ALEN); ++ verdict = 0; ++ for (i = 0; i < 6; i++) ++ verdict |= (dst[i] ^ info->dmaddr[i]) & ++ info->dmmsk[i]; ++ if (FWINV(verdict != 0, EBT_ARP_DST_MAC)) ++ return EBT_NOMATCH; ++ } ++ } ++ ++ return EBT_MATCH; ++} ++ ++static int ebt_arp_check(const char *tablename, unsigned int hookmask, ++ const struct ebt_entry *e, void *data, unsigned int datalen) ++{ ++ struct ebt_arp_info *info = (struct ebt_arp_info *)data; ++ ++ if (datalen != EBT_ALIGN(sizeof(struct ebt_arp_info))) ++ return -EINVAL; ++ if ((e->ethproto != __constant_htons(ETH_P_ARP) && ++ e->ethproto != __constant_htons(ETH_P_RARP)) || ++ e->invflags & EBT_IPROTO) ++ return -EINVAL; ++ if (info->bitmask & ~EBT_ARP_MASK || info->invflags & ~EBT_ARP_MASK) ++ return -EINVAL; ++ return 0; ++} ++ ++static struct ebt_match filter_arp = ++{ ++ {NULL, NULL}, EBT_ARP_MATCH, ebt_filter_arp, ebt_arp_check, NULL, ++ THIS_MODULE ++}; ++ ++static int __init init(void) ++{ ++ return ebt_register_match(&filter_arp); ++} ++ ++static void __exit fini(void) ++{ ++ ebt_unregister_match(&filter_arp); ++} ++ ++module_init(init); ++module_exit(fini); ++EXPORT_NO_SYMBOLS; ++MODULE_LICENSE("GPL"); +--- /dev/null Thu Aug 24 11:00:32 2000 ++++ linux-2.4.21-ebt-brnf-3/net/bridge/netfilter/ebt_ip.c Fri Aug 8 01:09:06 2003 +@@ -0,0 +1,121 @@ ++/* ++ * ebt_ip ++ * ++ * Authors: ++ * Bart De Schuymer <bart.de.schuymer@pandora.be> ++ * ++ * April, 2002 ++ * ++ * Changes: ++ * added ip-sport and ip-dport ++ * Innominate Security Technologies AG <mhopf@innominate.com> ++ * September, 2002 ++ */ ++ ++#include <linux/netfilter_bridge/ebtables.h> ++#include <linux/netfilter_bridge/ebt_ip.h> ++#include <linux/ip.h> ++#include <linux/in.h> ++#include <linux/module.h> ++ ++struct tcpudphdr { ++ uint16_t src; ++ uint16_t dst; ++}; ++ ++union h_u { ++ unsigned char *raw; ++ struct tcpudphdr *tuh; ++}; ++ ++static int ebt_filter_ip(const struct sk_buff *skb, const struct net_device *in, ++ const struct net_device *out, const void *data, ++ unsigned int datalen) ++{ ++ struct ebt_ip_info *info = (struct ebt_ip_info *)data; ++ ++ if (info->bitmask & EBT_IP_TOS && ++ FWINV(info->tos != ((*skb).nh.iph)->tos, EBT_IP_TOS)) ++ return EBT_NOMATCH; ++ if (info->bitmask & EBT_IP_PROTO) { ++ if (FWINV(info->protocol != ((*skb).nh.iph)->protocol, ++ EBT_IP_PROTO)) ++ return EBT_NOMATCH; ++ if ( info->protocol == IPPROTO_TCP || ++ info->protocol == IPPROTO_UDP ) ++ { ++ union h_u h; ++ h.raw = skb->data + skb->nh.iph->ihl*4; ++ if (info->bitmask & EBT_IP_DPORT) { ++ uint16_t port = ntohs(h.tuh->dst); ++ if (FWINV(port < info->dport[0] || ++ port > info->dport[1], ++ EBT_IP_DPORT)) ++ return EBT_NOMATCH; ++ } ++ if (info->bitmask & EBT_IP_SPORT) { ++ uint16_t port = ntohs(h.tuh->src); ++ if (FWINV(port < info->sport[0] || ++ port > info->sport[1], ++ EBT_IP_SPORT)) ++ return EBT_NOMATCH; ++ } ++ } ++ } ++ if (info->bitmask & EBT_IP_SOURCE && ++ FWINV((((*skb).nh.iph)->saddr & info->smsk) != ++ info->saddr, EBT_IP_SOURCE)) ++ return EBT_NOMATCH; ++ if ((info->bitmask & EBT_IP_DEST) && ++ FWINV((((*skb).nh.iph)->daddr & info->dmsk) != ++ info->daddr, EBT_IP_DEST)) ++ return EBT_NOMATCH; ++ return EBT_MATCH; ++} ++ ++static int ebt_ip_check(const char *tablename, unsigned int hookmask, ++ const struct ebt_entry *e, void *data, unsigned int datalen) ++{ ++ struct ebt_ip_info *info = (struct ebt_ip_info *)data; ++ ++ if (datalen != EBT_ALIGN(sizeof(struct ebt_ip_info))) ++ return -EINVAL; ++ if (e->ethproto != __constant_htons(ETH_P_IP) || ++ e->invflags & EBT_IPROTO) ++ return -EINVAL; ++ if (info->bitmask & ~EBT_IP_MASK || info->invflags & ~EBT_IP_MASK) ++ return -EINVAL; ++ if (info->bitmask & (EBT_IP_DPORT | EBT_IP_SPORT)) { ++ if (!info->bitmask & EBT_IPROTO) ++ return -EINVAL; ++ if (info->protocol != IPPROTO_TCP && ++ info->protocol != IPPROTO_UDP) ++ return -EINVAL; ++ } ++ if (info->bitmask & EBT_IP_DPORT && info->dport[0] > info->dport[1]) ++ return -EINVAL; ++ if (info->bitmask & EBT_IP_SPORT && info->sport[0] > info->sport[1]) ++ return -EINVAL; ++ return 0; ++} ++ ++static struct ebt_match filter_ip = ++{ ++ {NULL, NULL}, EBT_IP_MATCH, ebt_filter_ip, ebt_ip_check, NULL, ++ THIS_MODULE ++}; ++ ++static int __init init(void) ++{ ++ return ebt_register_match(&filter_ip); ++} ++ ++static void __exit fini(void) ++{ ++ ebt_unregister_match(&filter_ip); ++} ++ ++module_init(init); ++module_exit(fini); ++EXPORT_NO_SYMBOLS; ++MODULE_LICENSE("GPL"); +--- /dev/null Thu Aug 24 11:00:32 2000 ++++ linux-2.4.21-ebt-brnf-3/net/bridge/netfilter/ebt_vlan.c Fri Aug 8 01:09:06 2003 @@ -0,0 +1,259 @@ +/* + * Description: EBTables 802.1Q match extension kernelspace module. @@ -4075,286 +1786,298 @@ diff -Nurb linux.stock/net/bridge/netfilter/ebt_vlan.c linux/net/bridge/netfilte +module_exit(fini); + +EXPORT_NO_SYMBOLS; -diff -Nurb linux.stock/net/bridge/netfilter/ebtable_broute.c linux/net/bridge/netfilter/ebtable_broute.c ---- linux.stock/net/bridge/netfilter/ebtable_broute.c 1969-12-31 19:00:00.000000000 -0500 -+++ linux/net/bridge/netfilter/ebtable_broute.c 2004-07-10 23:46:39.000000000 -0400 -@@ -0,0 +1,79 @@ +--- /dev/null Thu Aug 24 11:00:32 2000 ++++ linux-2.4.21-ebt-brnf-3/net/bridge/netfilter/ebt_log.c Fri Aug 8 01:09:06 2003 +@@ -0,0 +1,152 @@ +/* -+ * ebtable_broute ++ * ebt_log + * + * 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/netfilter_bridge/ebt_log.h> +#include <linux/module.h> -+#include <linux/if_bridge.h> -+#include <linux/brlock.h> ++#include <linux/ip.h> ++#include <linux/in.h> ++#include <linux/if_arp.h> ++#include <linux/spinlock.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 spinlock_t ebt_log_lock = SPIN_LOCK_UNLOCKED; + -+static struct ebt_replace initial_table = ++static int ebt_log_check(const char *tablename, unsigned int hookmask, ++ const struct ebt_entry *e, void *data, unsigned int datalen) +{ -+ "broute", 1 << NF_BR_BROUTING, 0, sizeof(struct ebt_entries), -+ { [NF_BR_BROUTING]&initial_chain}, 0, NULL, (char *)&initial_chain -+}; ++ struct ebt_log_info *info = (struct ebt_log_info *)data; + -+static int check(const struct ebt_table_info *info, unsigned int valid_hooks) -+{ -+ if (valid_hooks & ~(1 << NF_BR_BROUTING)) ++ 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; +} + -+static struct ebt_table broute_table = ++struct tcpudphdr +{ -+ {NULL, NULL}, "broute", &initial_table, 1 << NF_BR_BROUTING, -+ RW_LOCK_UNLOCKED, check, NULL ++ uint16_t src; ++ uint16_t dst; +}; + -+static int ebt_broute(struct sk_buff **pskb) ++struct arppayload +{ -+ int ret; ++ unsigned char mac_src[ETH_ALEN]; ++ unsigned char ip_src[4]; ++ unsigned char mac_dst[ETH_ALEN]; ++ unsigned char ip_dst[4]; ++}; + -+ 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 void print_MAC(unsigned char *p) ++{ ++ int i; ++ ++ for (i = 0; i < ETH_ALEN; i++, p++) ++ printk("%02x%c", *p, i == ETH_ALEN - 1 ? ' ':':'); +} + -+static int __init init(void) ++#define myNIPQUAD(a) a[0], a[1], a[2], a[3] ++static void ebt_log(const struct sk_buff *skb, const struct net_device *in, ++ const struct net_device *out, const void *data, unsigned int datalen) +{ -+ int ret; ++ struct ebt_log_info *info = (struct ebt_log_info *)data; ++ char level_string[4] = "< >"; ++ level_string[1] = '0' + info->loglevel; + -+ 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; ++ 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) +{ -+ br_write_lock_bh(BR_NETPROTO_LOCK); -+ br_should_route_hook = NULL; -+ br_write_unlock_bh(BR_NETPROTO_LOCK); -+ ebt_unregister_table(&broute_table); ++ ebt_unregister_watcher(&log); +} + +module_init(init); +module_exit(fini); +EXPORT_NO_SYMBOLS; +MODULE_LICENSE("GPL"); -diff -Nurb linux.stock/net/bridge/netfilter/ebtable_filter.c linux/net/bridge/netfilter/ebtable_filter.c ---- linux.stock/net/bridge/netfilter/ebtable_filter.c 1969-12-31 19:00:00.000000000 -0500 -+++ linux/net/bridge/netfilter/ebtable_filter.c 2004-07-10 23:46:39.000000000 -0400 -@@ -0,0 +1,90 @@ +--- /dev/null Thu Aug 24 11:00:32 2000 ++++ linux-2.4.21-ebt-brnf-3/net/bridge/netfilter/ebt_snat.c Fri Aug 8 01:09:06 2003 +@@ -0,0 +1,64 @@ +/* -+ * ebtable_filter ++ * ebt_snat + * + * Authors: + * Bart De Schuymer <bart.de.schuymer@pandora.be> + * -+ * April, 2002 ++ * June, 2002 + * + */ + +#include <linux/netfilter_bridge/ebtables.h> ++#include <linux/netfilter_bridge/ebt_nat.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[] = ++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) +{ -+ {0, "INPUT", 0, EBT_ACCEPT, 0}, -+ {0, "FORWARD", 0, EBT_ACCEPT, 0}, -+ {0, "OUTPUT", 0, EBT_ACCEPT, 0} -+}; ++ struct ebt_nat_info *info = (struct ebt_nat_info *) data; + -+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 -+}; ++ memcpy(((**pskb).mac.ethernet)->h_source, info->mac, ++ ETH_ALEN * sizeof(unsigned char)); ++ return info->target; ++} + -+static int check(const struct ebt_table_info *info, unsigned int valid_hooks) ++static int ebt_target_snat_check(const char *tablename, unsigned int hookmask, ++ const struct ebt_entry *e, void *data, unsigned int datalen) +{ -+ if (valid_hooks & ~FILTER_VALID_HOOKS) ++ 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_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 *)) ++static struct ebt_target snat = +{ -+ 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} ++ {NULL, NULL}, EBT_SNAT_TARGET, ebt_target_snat, ebt_target_snat_check, ++ NULL, THIS_MODULE +}; + +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; ++ return ebt_register_target(&snat); +} + +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); ++ ebt_unregister_target(&snat); +} + +module_init(init); +module_exit(fini); +EXPORT_NO_SYMBOLS; +MODULE_LICENSE("GPL"); -diff -Nurb linux.stock/net/bridge/netfilter/ebtable_nat.c linux/net/bridge/netfilter/ebtable_nat.c ---- linux.stock/net/bridge/netfilter/ebtable_nat.c 1969-12-31 19:00:00.000000000 -0500 -+++ linux/net/bridge/netfilter/ebtable_nat.c 2004-07-10 23:46:39.000000000 -0400 -@@ -0,0 +1,96 @@ +--- /dev/null Thu Aug 24 11:00:32 2000 ++++ linux-2.4.21-ebt-brnf-3/net/bridge/netfilter/ebt_dnat.c Fri Aug 8 01:09:06 2003 +@@ -0,0 +1,65 @@ +/* -+ * ebtable_nat ++ * ebt_dnat + * + * Authors: + * Bart De Schuymer <bart.de.schuymer@pandora.be> + * -+ * April, 2002 ++ * June, 2002 + * + */ + +#include <linux/netfilter_bridge/ebtables.h> ++#include <linux/netfilter_bridge/ebt_nat.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} -+}; ++#include <net/sock.h> + -+static struct ebt_replace initial_table = ++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) +{ -+ "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 -+}; ++ struct ebt_nat_info *info = (struct ebt_nat_info *)data; + -+static int check(const struct ebt_table_info *info, unsigned int valid_hooks) -+{ -+ if (valid_hooks & ~NAT_VALID_HOOKS) -+ return -EINVAL; -+ return 0; ++ memcpy(((**pskb).mac.ethernet)->h_dest, info->mac, ++ ETH_ALEN * sizeof(unsigned char)); ++ return info->target; +} + -+static struct ebt_table frame_nat = ++static int ebt_target_dnat_check(const char *tablename, unsigned int hookmask, ++ const struct ebt_entry *e, void *data, unsigned int datalen) +{ -+ {NULL, NULL}, "nat", &initial_table, NAT_VALID_HOOKS, -+ RW_LOCK_UNLOCKED, check, NULL -+}; ++ struct ebt_nat_info *info = (struct ebt_nat_info *)data; + -+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); ++ 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 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 *)) ++static struct ebt_target dnat = +{ -+ 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}, ++ {NULL, NULL}, EBT_DNAT_TARGET, ebt_target_dnat, ebt_target_dnat_check, ++ NULL, THIS_MODULE +}; + +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; ++ return ebt_register_target(&dnat); +} + +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); ++ ebt_unregister_target(&dnat); +} + +module_init(init); +module_exit(fini); +EXPORT_NO_SYMBOLS; +MODULE_LICENSE("GPL"); -diff -Nurb linux.stock/net/bridge/netfilter/ebtables.c linux/net/bridge/netfilter/ebtables.c ---- linux.stock/net/bridge/netfilter/ebtables.c 1969-12-31 19:00:00.000000000 -0500 -+++ linux/net/bridge/netfilter/ebtables.c 2004-07-10 23:46:39.000000000 -0400 +--- /dev/null Thu Aug 24 11:00:32 2000 ++++ linux-2.4.21-ebt-brnf-3/net/bridge/netfilter/ebtables.c Fri Aug 8 01:09:06 2003 @@ -0,0 +1,1490 @@ +/* + * ebtables @@ -5846,44 +3569,817 @@ diff -Nurb linux.stock/net/bridge/netfilter/ebtables.c linux/net/bridge/netfilte +module_init(init); +module_exit(fini); +MODULE_LICENSE("GPL"); -diff -Nurb linux.stock/net/core/dev.c linux/net/core/dev.c ---- linux.stock/net/core/dev.c 2003-10-14 04:02:55.000000000 -0400 -+++ linux/net/core/dev.c 2004-07-10 23:46:39.000000000 -0400 -@@ -1393,7 +1393,7 @@ +--- /dev/null Thu Aug 24 11:00:32 2000 ++++ linux-2.4.21-ebt-brnf-3/include/linux/netfilter_bridge/ebtables.h Fri Aug 8 01:09:06 2003 +@@ -0,0 +1,361 @@ ++/* ++ * ebtables ++ * ++ * Authors: ++ * Bart De Schuymer <bart.de.schuymer@pandora.be> ++ * ++ * ebtables.c,v 2.0, September, 2002 ++ * ++ * This code is stongly inspired on the iptables code which is ++ * Copyright (C) 1999 Paul `Rusty' Russell & Michael J. Neuling ++ */ ++ ++#ifndef __LINUX_BRIDGE_EFF_H ++#define __LINUX_BRIDGE_EFF_H ++#include <linux/if.h> ++#include <linux/netfilter_bridge.h> ++#include <linux/if_ether.h> ++ ++#define EBT_TABLE_MAXNAMELEN 32 ++#define EBT_CHAIN_MAXNAMELEN EBT_TABLE_MAXNAMELEN ++#define EBT_FUNCTION_MAXNAMELEN EBT_TABLE_MAXNAMELEN ++ ++// verdicts >0 are "branches" ++#define EBT_ACCEPT -1 ++#define EBT_DROP -2 ++#define EBT_CONTINUE -3 ++#define EBT_RETURN -4 ++#define NUM_STANDARD_TARGETS 4 ++ ++struct ebt_replace ++{ ++ char name[EBT_TABLE_MAXNAMELEN]; ++ unsigned int valid_hooks; ++ // nr of rules in the table ++ unsigned int nentries; ++ // total size of the entries ++ unsigned int entries_size; ++ // start of the chains ++ struct ebt_entries *hook_entry[NF_BR_NUMHOOKS]; ++ // nr of counters userspace expects back ++ unsigned int num_counters; ++ // where the kernel will put the old counters ++ struct ebt_counter *counters; ++ char *entries; ++}; ++ ++struct ebt_counter ++{ ++ uint64_t pcnt; ++ uint64_t bcnt; ++}; ++ ++struct ebt_entries { ++ // this field is always set to zero ++ // See EBT_ENTRY_OR_ENTRIES. ++ // Must be same size as ebt_entry.bitmask ++ unsigned int distinguisher; ++ // the chain name ++ char name[EBT_CHAIN_MAXNAMELEN]; ++ // counter offset for this chain ++ unsigned int counter_offset; ++ // one standard (accept, drop, return) per hook ++ int policy; ++ // nr. of entries ++ unsigned int nentries; ++ // entry list ++ char data[0] __attribute__ ((aligned (__alignof__(struct ebt_replace)))); ++}; ++ ++// used for the bitmask of struct ebt_entry ++ ++// This is a hack to make a difference between an ebt_entry struct and an ++// ebt_entries struct when traversing the entries from start to end. ++// Using this simplifies the code alot, while still being able to use ++// ebt_entries. ++// Contrary, iptables doesn't use something like ebt_entries and therefore uses ++// different techniques for naming the policy and such. So, iptables doesn't ++// need a hack like this. ++#define EBT_ENTRY_OR_ENTRIES 0x01 ++// these are the normal masks ++#define EBT_NOPROTO 0x02 ++#define EBT_802_3 0x04 ++#define EBT_SOURCEMAC 0x08 ++#define EBT_DESTMAC 0x10 ++#define EBT_F_MASK (EBT_NOPROTO | EBT_802_3 | EBT_SOURCEMAC | EBT_DESTMAC \ ++ | EBT_ENTRY_OR_ENTRIES) ++ ++#define EBT_IPROTO 0x01 ++#define EBT_IIN 0x02 ++#define EBT_IOUT 0x04 ++#define EBT_ISOURCE 0x8 ++#define EBT_IDEST 0x10 ++#define EBT_ILOGICALIN 0x20 ++#define EBT_ILOGICALOUT 0x40 ++#define EBT_INV_MASK (EBT_IPROTO | EBT_IIN | EBT_IOUT | EBT_ILOGICALIN \ ++ | EBT_ILOGICALOUT | EBT_ISOURCE | EBT_IDEST) ++ ++struct ebt_entry_match ++{ ++ union { ++ char name[EBT_FUNCTION_MAXNAMELEN]; ++ struct ebt_match *match; ++ } u; ++ // size of data ++ unsigned int match_size; ++ unsigned char data[0] __attribute__ ((aligned (__alignof__(struct ebt_replace)))); ++}; ++ ++struct ebt_entry_watcher ++{ ++ union { ++ char name[EBT_FUNCTION_MAXNAMELEN]; ++ struct ebt_watcher *watcher; ++ } u; ++ // size of data ++ unsigned int watcher_size; ++ unsigned char data[0] __attribute__ ((aligned (__alignof__(struct ebt_replace)))); ++}; ++ ++struct ebt_entry_target ++{ ++ union { ++ char name[EBT_FUNCTION_MAXNAMELEN]; ++ struct ebt_target *target; ++ } u; ++ // size of data ++ unsigned int target_size; ++ unsigned char data[0] __attribute__ ((aligned (__alignof__(struct ebt_replace)))); ++}; ++ ++#define EBT_STANDARD_TARGET "standard" ++struct ebt_standard_target ++{ ++ struct ebt_entry_target target; ++ int verdict; ++}; ++ ++// one entry ++struct ebt_entry { ++ // this needs to be the first field ++ unsigned int bitmask; ++ unsigned int invflags; ++ uint16_t ethproto; ++ // the physical in-dev ++ char in[IFNAMSIZ]; ++ // the logical in-dev ++ char logical_in[IFNAMSIZ]; ++ // the physical out-dev ++ char out[IFNAMSIZ]; ++ // the logical out-dev ++ char logical_out[IFNAMSIZ]; ++ unsigned char sourcemac[ETH_ALEN]; ++ unsigned char sourcemsk[ETH_ALEN]; ++ unsigned char destmac[ETH_ALEN]; ++ unsigned char destmsk[ETH_ALEN]; ++ // sizeof ebt_entry + matches ++ unsigned int watchers_offset; ++ // sizeof ebt_entry + matches + watchers ++ unsigned int target_offset; ++ // sizeof ebt_entry + matches + watchers + target ++ unsigned int next_offset; ++ unsigned char elems[0] __attribute__ ((aligned (__alignof__(struct ebt_replace)))); ++}; ++ ++// [gs]etsockopt numbers ++#define EBT_BASE_CTL 128 ++ ++#define EBT_SO_SET_ENTRIES (EBT_BASE_CTL) ++#define EBT_SO_SET_COUNTERS (EBT_SO_SET_ENTRIES+1) ++#define EBT_SO_SET_MAX (EBT_SO_SET_COUNTERS+1) ++ ++#define EBT_SO_GET_INFO (EBT_BASE_CTL) ++#define EBT_SO_GET_ENTRIES (EBT_SO_GET_INFO+1) ++#define EBT_SO_GET_INIT_INFO (EBT_SO_GET_ENTRIES+1) ++#define EBT_SO_GET_INIT_ENTRIES (EBT_SO_GET_INIT_INFO+1) ++#define EBT_SO_GET_MAX (EBT_SO_GET_INIT_ENTRIES+1) ++ ++#ifdef __KERNEL__ ++ ++// return values for match() functions ++#define EBT_MATCH 0 ++#define EBT_NOMATCH 1 ++ ++struct ebt_match ++{ ++ struct list_head list; ++ const char name[EBT_FUNCTION_MAXNAMELEN]; ++ // 0 == it matches ++ int (*match)(const struct sk_buff *skb, const struct net_device *in, ++ const struct net_device *out, const void *matchdata, ++ unsigned int datalen); ++ // 0 == let it in ++ int (*check)(const char *tablename, unsigned int hookmask, ++ const struct ebt_entry *e, void *matchdata, unsigned int datalen); ++ void (*destroy)(void *matchdata, unsigned int datalen); ++ struct module *me; ++}; ++ ++struct ebt_watcher ++{ ++ struct list_head list; ++ const char name[EBT_FUNCTION_MAXNAMELEN]; ++ void (*watcher)(const struct sk_buff *skb, const struct net_device *in, ++ const struct net_device *out, const void *watcherdata, ++ unsigned int datalen); ++ // 0 == let it in ++ int (*check)(const char *tablename, unsigned int hookmask, ++ const struct ebt_entry *e, void *watcherdata, unsigned int datalen); ++ void (*destroy)(void *watcherdata, unsigned int datalen); ++ struct module *me; ++}; ++ ++struct ebt_target ++{ ++ struct list_head list; ++ const char name[EBT_FUNCTION_MAXNAMELEN]; ++ // returns one of the standard verdicts ++ int (*target)(struct sk_buff **pskb, unsigned int hooknr, ++ const struct net_device *in, const struct net_device *out, ++ const void *targetdata, unsigned int datalen); ++ // 0 == let it in ++ int (*check)(const char *tablename, unsigned int hookmask, ++ const struct ebt_entry *e, void *targetdata, unsigned int datalen); ++ void (*destroy)(void *targetdata, unsigned int datalen); ++ struct module *me; ++}; ++ ++// used for jumping from and into user defined chains (udc) ++struct ebt_chainstack ++{ ++ struct ebt_entries *chaininfo; // pointer to chain data ++ struct ebt_entry *e; // pointer to entry data ++ unsigned int n; // n'th entry ++}; ++ ++struct ebt_table_info ++{ ++ // total size of the entries ++ unsigned int entries_size; ++ unsigned int nentries; ++ // pointers to the start of the chains ++ struct ebt_entries *hook_entry[NF_BR_NUMHOOKS]; ++ // room to maintain the stack used for jumping from and into udc ++ struct ebt_chainstack **chainstack; ++ char *entries; ++ struct ebt_counter counters[0] ____cacheline_aligned; ++}; ++ ++struct ebt_table ++{ ++ struct list_head list; ++ char name[EBT_TABLE_MAXNAMELEN]; ++ struct ebt_replace *table; ++ unsigned int valid_hooks; ++ rwlock_t lock; ++ // e.g. could be the table explicitly only allows certain ++ // matches, targets, ... 0 == let it in ++ int (*check)(const struct ebt_table_info *info, ++ unsigned int valid_hooks); ++ // the data used by the kernel ++ struct ebt_table_info *private; ++}; ++ ++#define EBT_ALIGN(s) (((s) + (__alignof__(struct ebt_replace)-1)) & \ ++ ~(__alignof__(struct ebt_replace)-1)) ++extern int ebt_register_table(struct ebt_table *table); ++extern void ebt_unregister_table(struct ebt_table *table); ++extern int ebt_register_match(struct ebt_match *match); ++extern void ebt_unregister_match(struct ebt_match *match); ++extern int ebt_register_watcher(struct ebt_watcher *watcher); ++extern void ebt_unregister_watcher(struct ebt_watcher *watcher); ++extern int ebt_register_target(struct ebt_target *target); ++extern void ebt_unregister_target(struct ebt_target *target); ++extern unsigned int ebt_do_table(unsigned int hook, struct sk_buff **pskb, ++ const struct net_device *in, const struct net_device *out, ++ struct ebt_table *table); ++ ++ // Used in the kernel match() functions ++#define FWINV(bool,invflg) ((bool) ^ !!(info->invflags & invflg)) ++// True if the hook mask denotes that the rule is in a base chain, ++// used in the check() functions ++#define BASE_CHAIN (hookmask & (1 << NF_BR_NUMHOOKS)) ++// Clear the bit in the hook mask that tells if the rule is on a base chain ++#define CLEAR_BASE_CHAIN_BIT (hookmask &= ~(1 << NF_BR_NUMHOOKS)) ++// True if the target is not a standard target ++#define INVALID_TARGET (info->target < -NUM_STANDARD_TARGETS || info->target >= 0) ++ ++#endif /* __KERNEL__ */ ++ ++// blatently stolen from ip_tables.h ++// fn returns 0 to continue iteration ++#define EBT_MATCH_ITERATE(e, fn, args...) \ ++({ \ ++ unsigned int __i; \ ++ int __ret = 0; \ ++ struct ebt_entry_match *__match; \ ++ \ ++ for (__i = sizeof(struct ebt_entry); \ ++ __i < (e)->watchers_offset; \ ++ __i += __match->match_size + \ ++ sizeof(struct ebt_entry_match)) { \ ++ __match = (void *)(e) + __i; \ ++ \ ++ __ret = fn(__match , ## args); \ ++ if (__ret != 0) \ ++ break; \ ++ } \ ++ if (__ret == 0) { \ ++ if (__i != (e)->watchers_offset) \ ++ __ret = -EINVAL; \ ++ } \ ++ __ret; \ ++}) ++ ++#define EBT_WATCHER_ITERATE(e, fn, args...) \ ++({ \ ++ unsigned int __i; \ ++ int __ret = 0; \ ++ struct ebt_entry_watcher *__watcher; \ ++ \ ++ for (__i = e->watchers_offset; \ ++ __i < (e)->target_offset; \ ++ __i += __watcher->watcher_size + \ ++ sizeof(struct ebt_entry_watcher)) { \ ++ __watcher = (void *)(e) + __i; \ ++ \ ++ __ret = fn(__watcher , ## args); \ ++ if (__ret != 0) \ ++ break; \ ++ } \ ++ if (__ret == 0) { \ ++ if (__i != (e)->target_offset) \ ++ __ret = -EINVAL; \ ++ } \ ++ __ret; \ ++}) ++ ++#define EBT_ENTRY_ITERATE(entries, size, fn, args...) \ ++({ \ ++ unsigned int __i; \ ++ int __ret = 0; \ ++ struct ebt_entry *__entry; \ ++ \ ++ for (__i = 0; __i < (size);) { \ ++ __entry = (void *)(entries) + __i; \ ++ __ret = fn(__entry , ## args); \ ++ if (__ret != 0) \ ++ break; \ ++ if (__entry->bitmask != 0) \ ++ __i += __entry->next_offset; \ ++ else \ ++ __i += sizeof(struct ebt_entries); \ ++ } \ ++ if (__ret == 0) { \ ++ if (__i != (size)) \ ++ __ret = -EINVAL; \ ++ } \ ++ __ret; \ ++}) ++ ++#endif +--- /dev/null Thu Aug 24 11:00:32 2000 ++++ linux-2.4.21-ebt-brnf-3/include/linux/netfilter_bridge/ebt_802_3.h Fri Aug 8 01:09:06 2003 +@@ -0,0 +1,60 @@ ++#ifndef __LINUX_BRIDGE_EBT_802_3_H ++#define __LINUX_BRIDGE_EBT_802_3_H ++ ++#define EBT_802_3_SAP 0x01 ++#define EBT_802_3_TYPE 0x02 ++ ++#define EBT_802_3_MATCH "802_3" ++ ++/* ++ * If frame has DSAP/SSAP value 0xaa you must check the SNAP type ++ * to discover what kind of packet we're carrying. ++ */ ++#define CHECK_TYPE 0xaa ++ ++/* ++ * Control field may be one or two bytes. If the first byte has ++ * the value 0x03 then the entire length is one byte, otherwise it is two. ++ * One byte controls are used in Unnumbered Information frames. ++ * Two byte controls are used in Numbered Information frames. ++ */ ++#define IS_UI 0x03 ++ ++#define EBT_802_3_MASK (EBT_802_3_SAP | EBT_802_3_TYPE | EBT_802_3) ++ ++/* ui has one byte ctrl, ni has two */ ++struct hdr_ui { ++ uint8_t dsap; ++ uint8_t ssap; ++ uint8_t ctrl; ++ uint8_t orig[3]; ++ uint16_t type; ++}; ++ ++struct hdr_ni { ++ uint8_t dsap; ++ uint8_t ssap; ++ uint16_t ctrl; ++ uint8_t orig[3]; ++ uint16_t type; ++}; ++ ++struct ebt_802_3_hdr { ++ uint8_t daddr[6]; ++ uint8_t saddr[6]; ++ uint16_t len; ++ union { ++ struct hdr_ui ui; ++ struct hdr_ni ni; ++ } llc; ++}; ++ ++struct ebt_802_3_info ++{ ++ uint8_t sap; ++ uint16_t type; ++ uint8_t bitmask; ++ uint8_t invflags; ++}; ++ ++#endif +--- /dev/null Thu Aug 24 11:00:32 2000 ++++ linux-2.4.21-ebt-brnf-3/include/linux/netfilter_bridge/ebt_arp.h Fri Aug 8 01:09:06 2003 +@@ -0,0 +1,32 @@ ++#ifndef __LINUX_BRIDGE_EBT_ARP_H ++#define __LINUX_BRIDGE_EBT_ARP_H ++ ++#define EBT_ARP_OPCODE 0x01 ++#define EBT_ARP_HTYPE 0x02 ++#define EBT_ARP_PTYPE 0x04 ++#define EBT_ARP_SRC_IP 0x08 ++#define EBT_ARP_DST_IP 0x10 ++#define EBT_ARP_SRC_MAC 0x20 ++#define EBT_ARP_DST_MAC 0x40 ++#define EBT_ARP_MASK (EBT_ARP_OPCODE | EBT_ARP_HTYPE | EBT_ARP_PTYPE | \ ++ EBT_ARP_SRC_IP | EBT_ARP_DST_IP | EBT_ARP_SRC_MAC | EBT_ARP_DST_MAC) ++#define EBT_ARP_MATCH "arp" ++ ++struct ebt_arp_info ++{ ++ uint16_t htype; ++ uint16_t ptype; ++ uint16_t opcode; ++ uint32_t saddr; ++ uint32_t smsk; ++ uint32_t daddr; ++ uint32_t dmsk; ++ unsigned char smaddr[ETH_ALEN]; ++ unsigned char smmsk[ETH_ALEN]; ++ unsigned char dmaddr[ETH_ALEN]; ++ unsigned char dmmsk[ETH_ALEN]; ++ uint8_t bitmask; ++ uint8_t invflags; ++}; ++ ++#endif +--- /dev/null Thu Aug 24 11:00:32 2000 ++++ linux-2.4.21-ebt-brnf-3/include/linux/netfilter_bridge/ebt_ip.h Fri Aug 8 01:09:06 2003 +@@ -0,0 +1,43 @@ ++/* ++ * ebt_ip ++ * ++ * Authors: ++ * Bart De Schuymer <bart.de.schuymer@pandora.be> ++ * ++ * April, 2002 ++ * ++ * Changes: ++ * added ip-sport and ip-dport ++ * Innominate Security Technologies AG <mhopf@innominate.com> ++ * September, 2002 ++ */ ++ ++#ifndef __LINUX_BRIDGE_EBT_IP_H ++#define __LINUX_BRIDGE_EBT_IP_H ++ ++#define EBT_IP_SOURCE 0x01 ++#define EBT_IP_DEST 0x02 ++#define EBT_IP_TOS 0x04 ++#define EBT_IP_PROTO 0x08 ++#define EBT_IP_SPORT 0x10 ++#define EBT_IP_DPORT 0x20 ++#define EBT_IP_MASK (EBT_IP_SOURCE | EBT_IP_DEST | EBT_IP_TOS | EBT_IP_PROTO |\ ++ EBT_IP_SPORT | EBT_IP_DPORT ) ++#define EBT_IP_MATCH "ip" ++ ++// the same values are used for the invflags ++struct ebt_ip_info ++{ ++ uint32_t saddr; ++ uint32_t daddr; ++ uint32_t smsk; ++ uint32_t dmsk; ++ uint8_t tos; ++ uint8_t protocol; ++ uint8_t bitmask; ++ uint8_t invflags; ++ uint16_t sport[2]; ++ uint16_t dport[2]; ++}; ++ ++#endif +--- /dev/null Thu Aug 24 11:00:32 2000 ++++ linux-2.4.21-ebt-brnf-3/include/linux/netfilter_bridge/ebt_pkttype.h Fri Aug 8 01:09:06 2003 +@@ -0,0 +1,11 @@ ++#ifndef __LINUX_BRIDGE_EBT_PKTTYPE_H ++#define __LINUX_BRIDGE_EBT_PKTTYPE_H ++ ++struct ebt_pkttype_info ++{ ++ uint8_t pkt_type; ++ uint8_t invert; ++}; ++#define EBT_PKTTYPE_MATCH "pkttype" ++ ++#endif +--- /dev/null Thu Aug 24 11:00:32 2000 ++++ linux-2.4.21-ebt-brnf-3/include/linux/netfilter_bridge/ebt_stp.h Fri Aug 8 01:09:06 2003 +@@ -0,0 +1,46 @@ ++#ifndef __LINUX_BRIDGE_EBT_STP_H ++#define __LINUX_BRIDGE_EBT_STP_H ++ ++#define EBT_STP_TYPE 0x0001 ++ ++#define EBT_STP_FLAGS 0x0002 ++#define EBT_STP_ROOTPRIO 0x0004 ++#define EBT_STP_ROOTADDR 0x0008 ++#define EBT_STP_ROOTCOST 0x0010 ++#define EBT_STP_SENDERPRIO 0x0020 ++#define EBT_STP_SENDERADDR 0x0040 ++#define EBT_STP_PORT 0x0080 ++#define EBT_STP_MSGAGE 0x0100 ++#define EBT_STP_MAXAGE 0x0200 ++#define EBT_STP_HELLOTIME 0x0400 ++#define EBT_STP_FWDD 0x0800 ++ ++#define EBT_STP_MASK 0x0fff ++#define EBT_STP_CONFIG_MASK 0x0ffe ++ ++#define EBT_STP_MATCH "stp" ++ ++struct ebt_stp_config_info ++{ ++ uint8_t flags; ++ uint16_t root_priol, root_priou; ++ char root_addr[6], root_addrmsk[6]; ++ uint32_t root_costl, root_costu; ++ uint16_t sender_priol, sender_priou; ++ char sender_addr[6], sender_addrmsk[6]; ++ uint16_t portl, portu; ++ uint16_t msg_agel, msg_ageu; ++ uint16_t max_agel, max_ageu; ++ uint16_t hello_timel, hello_timeu; ++ uint16_t forward_delayl, forward_delayu; ++}; ++ ++struct ebt_stp_info ++{ ++ uint8_t type; ++ struct ebt_stp_config_info config; ++ uint16_t bitmask; ++ uint16_t invflags; ++}; ++ ++#endif +--- /dev/null Thu Aug 24 11:00:32 2000 ++++ linux-2.4.21-ebt-brnf-3/include/linux/netfilter_bridge/ebt_vlan.h Fri Aug 8 01:09:06 2003 +@@ -0,0 +1,20 @@ ++#ifndef __LINUX_BRIDGE_EBT_VLAN_H ++#define __LINUX_BRIDGE_EBT_VLAN_H ++ ++#define EBT_VLAN_ID 0x01 ++#define EBT_VLAN_PRIO 0x02 ++#define EBT_VLAN_ENCAP 0x04 ++#define EBT_VLAN_MASK (EBT_VLAN_ID | EBT_VLAN_PRIO | EBT_VLAN_ENCAP) ++#define EBT_VLAN_MATCH "vlan" ++ ++struct ebt_vlan_info { ++ uint16_t id; /* VLAN ID {1-4095} */ ++ uint8_t prio; /* VLAN User Priority {0-7} */ ++ uint16_t encap; /* VLAN Encapsulated frame code {0-65535} */ ++ uint8_t bitmask; /* Args bitmask bit 1=1 - ID arg, ++ bit 2=1 User-Priority arg, bit 3=1 encap*/ ++ uint8_t invflags; /* Inverse bitmask bit 1=1 - inversed ID arg, ++ bit 2=1 - inversed Pirority arg */ ++}; ++ ++#endif +--- /dev/null Thu Aug 24 11:00:32 2000 ++++ linux-2.4.21-ebt-brnf-3/include/linux/netfilter_bridge/ebt_log.h Fri Aug 8 01:09:06 2003 +@@ -0,0 +1,17 @@ ++#ifndef __LINUX_BRIDGE_EBT_LOG_H ++#define __LINUX_BRIDGE_EBT_LOG_H ++ ++#define EBT_LOG_IP 0x01 // if the frame is made by ip, log the ip information ++#define EBT_LOG_ARP 0x02 ++#define EBT_LOG_MASK (EBT_LOG_IP | EBT_LOG_ARP) ++#define EBT_LOG_PREFIX_SIZE 30 ++#define EBT_LOG_WATCHER "log" ++ ++struct ebt_log_info ++{ ++ uint8_t loglevel; ++ uint8_t prefix[EBT_LOG_PREFIX_SIZE]; ++ uint32_t bitmask; ++}; ++ ++#endif +--- /dev/null Thu Aug 24 11:00:32 2000 ++++ linux-2.4.21-ebt-brnf-3/include/linux/netfilter_bridge/ebt_nat.h Fri Aug 8 01:09:06 2003 +@@ -0,0 +1,13 @@ ++#ifndef __LINUX_BRIDGE_EBT_NAT_H ++#define __LINUX_BRIDGE_EBT_NAT_H ++ ++struct ebt_nat_info ++{ ++ unsigned char mac[ETH_ALEN]; ++ // EBT_ACCEPT, EBT_DROP, EBT_CONTINUE or EBT_RETURN ++ int target; ++}; ++#define EBT_SNAT_TARGET "snat" ++#define EBT_DNAT_TARGET "dnat" ++ ++#endif +--- /dev/null Thu Aug 24 11:00:32 2000 ++++ linux-2.4.21-ebt-brnf-3/include/linux/netfilter_bridge/ebt_redirect.h Fri Aug 8 01:09:06 2003 +@@ -0,0 +1,11 @@ ++#ifndef __LINUX_BRIDGE_EBT_REDIRECT_H ++#define __LINUX_BRIDGE_EBT_REDIRECT_H ++ ++struct ebt_redirect_info ++{ ++ // EBT_ACCEPT, EBT_DROP or EBT_CONTINUE or EBT_RETURN ++ int target; ++}; ++#define EBT_REDIRECT_TARGET "redirect" ++ ++#endif +--- /dev/null Thu Aug 24 11:00:32 2000 ++++ linux-2.4.21-ebt-brnf-3/include/linux/netfilter_bridge/ebt_mark_m.h Fri Aug 8 01:09:06 2003 +@@ -0,0 +1,15 @@ ++#ifndef __LINUX_BRIDGE_EBT_MARK_M_H ++#define __LINUX_BRIDGE_EBT_MARK_M_H ++ ++#define EBT_MARK_AND 0x01 ++#define EBT_MARK_OR 0x02 ++#define EBT_MARK_MASK (EBT_MARK_AND | EBT_MARK_OR) ++struct ebt_mark_m_info ++{ ++ unsigned long mark, mask; ++ uint8_t invert; ++ uint8_t bitmask; ++}; ++#define EBT_MARK_MATCH "mark_m" ++ ++#endif +--- /dev/null Thu Aug 24 11:00:32 2000 ++++ linux-2.4.21-ebt-brnf-3/include/linux/netfilter_bridge/ebt_mark_t.h Fri Aug 8 01:09:06 2003 +@@ -0,0 +1,12 @@ ++#ifndef __LINUX_BRIDGE_EBT_MARK_T_H ++#define __LINUX_BRIDGE_EBT_MARK_T_H ++ ++struct ebt_mark_t_info ++{ ++ unsigned long mark; ++ // EBT_ACCEPT, EBT_DROP or EBT_CONTINUE or EBT_RETURN ++ int target; ++}; ++#define EBT_MARK_TARGET "mark" ++ ++#endif +--- linux-2.4.21/include/linux/netfilter.h Thu Nov 22 20:47:48 2001 ++++ linux-2.4.21-ebt-brnf-3/include/linux/netfilter.h Fri Aug 8 01:09:06 2003 +@@ -117,28 +117,34 @@ extern struct list_head nf_hooks[NPROTO] + /* This is gross, but inline doesn't cut it for avoiding the function + call in fast path: gcc doesn't inline (needs value tracking?). --RR */ + #ifdef CONFIG_NETFILTER_DEBUG +-#define NF_HOOK nf_hook_slow ++#define NF_HOOK(pf, hook, skb, indev, outdev, okfn) \ ++nf_hook_slow((pf), (hook), (skb), (indev), (outdev), (okfn), INT_MIN) ++#define NF_HOOK_THRESH nf_hook_slow + #else + #define NF_HOOK(pf, hook, skb, indev, outdev, okfn) \ + (list_empty(&nf_hooks[(pf)][(hook)]) \ + ? (okfn)(skb) \ +- : nf_hook_slow((pf), (hook), (skb), (indev), (outdev), (okfn))) ++ : nf_hook_slow((pf), (hook), (skb), (indev), (outdev), (okfn), INT_MIN)) ++#define NF_HOOK_THRESH(pf, hook, skb, indev, outdev, okfn, thresh) \ ++(list_empty(&nf_hooks[(pf)][(hook)]) \ ++ ? (okfn)(skb) \ ++ : nf_hook_slow((pf), (hook), (skb), (indev), (outdev), (okfn), (thresh))) + #endif + + int nf_hook_slow(int pf, unsigned int hook, struct sk_buff *skb, + struct net_device *indev, struct net_device *outdev, +- int (*okfn)(struct sk_buff *)); ++ int (*okfn)(struct sk_buff *), int thresh); + /* Call setsockopt() */ +-int nf_setsockopt(struct sock *sk, int pf, int optval, char *opt, ++int nf_setsockopt(struct sock *sk, int pf, int optval, char *opt, + int len); + int nf_getsockopt(struct sock *sk, int pf, int optval, char *opt, + int *len); - #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; + /* Packet queuing */ +-typedef int (*nf_queue_outfn_t)(struct sk_buff *skb, ++typedef int (*nf_queue_outfn_t)(struct sk_buff *skb, + struct nf_info *info, void *data); +-extern int nf_register_queue_handler(int pf, ++extern int nf_register_queue_handler(int pf, + nf_queue_outfn_t outfn, void *data); + extern int nf_unregister_queue_handler(int pf); + extern void nf_reinject(struct sk_buff *skb, +--- linux-2.4.21/include/linux/netfilter_ipv4.h Mon Feb 25 20:38:13 2002 ++++ linux-2.4.21-ebt-brnf-3/include/linux/netfilter_ipv4.h Fri Aug 8 01:09:06 2003 +@@ -52,8 +52,10 @@ + enum nf_ip_hook_priorities { + NF_IP_PRI_FIRST = INT_MIN, + NF_IP_PRI_CONNTRACK = -200, ++ NF_IP_PRI_BRIDGE_SABOTAGE_FORWARD = -175, + NF_IP_PRI_MANGLE = -150, + NF_IP_PRI_NAT_DST = -100, ++ NF_IP_PRI_BRIDGE_SABOTAGE_LOCAL_OUT = -50, + NF_IP_PRI_FILTER = 0, + NF_IP_PRI_NAT_SRC = 100, + NF_IP_PRI_LAST = INT_MAX, +--- linux-2.4.21/include/linux/skbuff.h Fri Jun 13 16:51:39 2003 ++++ linux-2.4.21-ebt-brnf-3/include/linux/skbuff.h Fri Aug 8 01:09:06 2003 +@@ -92,6 +92,17 @@ struct nf_conntrack { + struct nf_ct_info { + struct nf_conntrack *master; + }; ++ ++#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) ++struct nf_bridge_info { ++ atomic_t use; ++ struct net_device *physindev; ++ struct net_device *physoutdev; ++ unsigned int mask; ++ unsigned long hh[16 / sizeof(unsigned long)]; ++}; ++#endif ++ #endif - static __inline__ int handle_bridge(struct sk_buff *skb, -@@ -1410,7 +1410,6 @@ - } - } + struct sk_buff_head { +@@ -204,6 +215,9 @@ struct sk_buff { + #ifdef CONFIG_NETFILTER_DEBUG + unsigned int nf_debug; + #endif ++#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) ++ struct nf_bridge_info *nf_bridge; /* Saved data about a bridged frame - see br_netfilter.c */ ++#endif + #endif /*CONFIG_NETFILTER*/ -- br_handle_frame_hook(skb); - return ret; + #if defined(CONFIG_HIPPI) +@@ -278,7 +292,7 @@ static inline struct sk_buff *skb_get(st + * If users==1, we are the only owner and are can avoid redundant + * atomic change. + */ +- ++ + /** + * kfree_skb - free an sk_buff + * @skb: buffer to free +@@ -286,7 +300,7 @@ static inline struct sk_buff *skb_get(st + * Drop a reference to the buffer and free it if the usage count has + * hit zero. + */ +- ++ + static inline void kfree_skb(struct sk_buff *skb) + { + if (atomic_read(&skb->users) == 1 || atomic_dec_and_test(&skb->users)) +@@ -1165,6 +1179,20 @@ nf_conntrack_get(struct nf_ct_info *nfct + if (nfct) + atomic_inc(&nfct->master->use); } - -@@ -1470,7 +1469,12 @@ - #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) - if (skb->dev->br_port != NULL && - br_handle_frame_hook != NULL) { -- return handle_bridge(skb, pt_prev); -+ int ret; + -+ ret = handle_bridge(skb, pt_prev); -+ if (br_handle_frame_hook(skb) == 0) -+ return ret; -+ pt_prev = NULL; - } ++#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) ++static inline void nf_bridge_put(struct nf_bridge_info *nf_bridge) ++{ ++ if (nf_bridge && atomic_dec_and_test(&nf_bridge->use)) ++ kfree(nf_bridge); ++} ++static inline void nf_bridge_get(struct nf_bridge_info *nf_bridge) ++{ ++ if (nf_bridge) ++ atomic_inc(&nf_bridge->use); ++} ++#endif ++ #endif -diff -Nurb linux.stock/net/core/netfilter.c linux/net/core/netfilter.c ---- linux.stock/net/core/netfilter.c 2004-07-10 23:29:56.000000000 -0400 -+++ linux/net/core/netfilter.c 2004-07-10 23:46:39.000000000 -0400 -@@ -344,10 +344,15 @@ + #endif /* __KERNEL__ */ +--- linux-2.4.21/net/core/netfilter.c Sat Aug 3 02:39:46 2002 ++++ linux-2.4.21-ebt-brnf-3/net/core/netfilter.c Fri Aug 8 01:09:06 2003 +@@ -1,4 +1,4 @@ +-/* netfilter.c: look after the filters for various protocols. ++/* netfilter.c: look after the filters for various protocols. + * Heavily influenced by the old firewall.c by David Bonn and Alan Cox. + * + * Thanks to Rob `CmdrTaco' Malda for not influencing this code in any +@@ -342,10 +342,15 @@ static unsigned int nf_iterate(struct li const struct net_device *indev, const struct net_device *outdev, struct list_head **i, @@ -5900,7 +4396,42 @@ diff -Nurb linux.stock/net/core/netfilter.c linux/net/core/netfilter.c switch (elem->hook(hook, skb, indev, outdev, okfn)) { case NF_QUEUE: return NF_QUEUE; -@@ -415,6 +420,10 @@ +@@ -365,7 +370,7 @@ static unsigned int nf_iterate(struct li + break; + + default: +- NFDEBUG("Evil return from %p(%u).\n", ++ NFDEBUG("Evil return from %p(%u).\n", + elem->hook, hook); + #endif + } +@@ -374,7 +379,7 @@ static unsigned int nf_iterate(struct li + } + + int nf_register_queue_handler(int pf, nf_queue_outfn_t outfn, void *data) +-{ ++{ + int ret; + + br_write_lock_bh(BR_NETPROTO_LOCK); +@@ -400,12 +405,12 @@ int nf_unregister_queue_handler(int pf) + return 0; + } + +-/* +- * Any packet that leaves via this function must come back ++/* ++ * Any packet that leaves via this function must come back + * through nf_reinject(). + */ +-static void nf_queue(struct sk_buff *skb, +- struct list_head *elem, ++static void nf_queue(struct sk_buff *skb, ++ struct list_head *elem, + int pf, unsigned int hook, + struct net_device *indev, + struct net_device *outdev, +@@ -413,6 +418,10 @@ static void nf_queue(struct sk_buff *skb { int status; struct nf_info *info; @@ -5911,7 +4442,15 @@ diff -Nurb linux.stock/net/core/netfilter.c linux/net/core/netfilter.c if (!queue_handler[pf].outfn) { kfree_skb(skb); -@@ -437,11 +446,24 @@ +@@ -428,18 +437,31 @@ static void nf_queue(struct sk_buff *skb + return; + } + +- *info = (struct nf_info) { ++ *info = (struct nf_info) { + (struct nf_hook_ops *)elem, pf, hook, indev, outdev, okfn }; + + /* Bump dev refs so they don't vanish while packet is out */ if (indev) dev_hold(indev); if (outdev) dev_hold(outdev); @@ -5936,7 +4475,7 @@ diff -Nurb linux.stock/net/core/netfilter.c linux/net/core/netfilter.c kfree(info); kfree_skb(skb); return; -@@ -451,7 +473,8 @@ +@@ -449,7 +471,8 @@ static void nf_queue(struct sk_buff *skb int nf_hook_slow(int pf, unsigned int hook, struct sk_buff *skb, struct net_device *indev, struct net_device *outdev, @@ -5946,7 +4485,7 @@ diff -Nurb linux.stock/net/core/netfilter.c linux/net/core/netfilter.c { struct list_head *elem; unsigned int verdict; -@@ -483,7 +506,7 @@ +@@ -481,7 +504,7 @@ int nf_hook_slow(int pf, unsigned int ho elem = &nf_hooks[pf][hook]; verdict = nf_iterate(&nf_hooks[pf][hook], &skb, hook, indev, @@ -5955,7 +4494,7 @@ diff -Nurb linux.stock/net/core/netfilter.c linux/net/core/netfilter.c if (verdict == NF_QUEUE) { NFDEBUG("nf_hook: Verdict = QUEUE.\n"); nf_queue(skb, elem, pf, hook, indev, outdev, okfn); -@@ -512,6 +535,14 @@ +@@ -510,6 +533,14 @@ void nf_reinject(struct sk_buff *skb, st /* We don't have BR_NETPROTO_LOCK here */ br_read_lock_bh(BR_NETPROTO_LOCK); @@ -5970,19 +4509,47 @@ diff -Nurb linux.stock/net/core/netfilter.c linux/net/core/netfilter.c 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. */ -@@ -532,7 +563,7 @@ +@@ -528,9 +559,9 @@ void nf_reinject(struct sk_buff *skb, st + + if (verdict == NF_ACCEPT) { verdict = nf_iterate(&nf_hooks[info->pf][info->hook], - &skb, info->hook, +- &skb, info->hook, ++ &skb, info->hook, info->indev, info->outdev, &elem, - info->okfn); + info->okfn, INT_MIN); } switch (verdict) { -diff -Nurb linux.stock/net/core/skbuff.c linux/net/core/skbuff.c ---- linux.stock/net/core/skbuff.c 2003-10-14 04:09:32.000000000 -0400 -+++ linux/net/core/skbuff.c 2004-07-10 23:46:39.000000000 -0400 -@@ -244,6 +244,9 @@ +@@ -539,20 +570,19 @@ void nf_reinject(struct sk_buff *skb, st + break; + + case NF_QUEUE: +- nf_queue(skb, elem, info->pf, info->hook, ++ nf_queue(skb, elem, info->pf, info->hook, + info->indev, info->outdev, info->okfn); + break; +- +- case NF_DROP: +- kfree_skb(skb); +- break; + } + br_read_unlock_bh(BR_NETPROTO_LOCK); + + /* Release those devices we held, or Alexey will kill me. */ + if (info->indev) dev_put(info->indev); + if (info->outdev) dev_put(info->outdev); +- ++ ++ if (verdict == NF_DROP) ++ kfree_skb(skb); ++ + kfree(info); + return; + } +--- linux-2.4.21/net/core/skbuff.c Fri Jun 13 16:51:39 2003 ++++ linux-2.4.21-ebt-brnf-3/net/core/skbuff.c Fri Aug 8 01:09:06 2003 +@@ -245,6 +245,9 @@ static inline void skb_headerinit(void * #ifdef CONFIG_NETFILTER_DEBUG skb->nf_debug = 0; #endif @@ -5992,7 +4559,7 @@ diff -Nurb linux.stock/net/core/skbuff.c linux/net/core/skbuff.c #endif #ifdef CONFIG_NET_SCHED skb->tc_index = 0; -@@ -324,6 +327,9 @@ +@@ -325,6 +328,9 @@ void __kfree_skb(struct sk_buff *skb) } #ifdef CONFIG_NETFILTER nf_conntrack_put(skb->nfct); @@ -6002,7 +4569,7 @@ diff -Nurb linux.stock/net/core/skbuff.c linux/net/core/skbuff.c #endif skb_headerinit(skb, NULL, 0); /* clean state */ kfree_skbmem(skb); -@@ -390,6 +396,9 @@ +@@ -391,6 +397,9 @@ struct sk_buff *skb_clone(struct sk_buff #ifdef CONFIG_NETFILTER_DEBUG C(nf_debug); #endif @@ -6012,7 +4579,7 @@ diff -Nurb linux.stock/net/core/skbuff.c linux/net/core/skbuff.c #endif /*CONFIG_NETFILTER*/ #if defined(CONFIG_HIPPI) C(private); -@@ -402,6 +411,9 @@ +@@ -403,6 +412,9 @@ struct sk_buff *skb_clone(struct sk_buff skb->cloned = 1; #ifdef CONFIG_NETFILTER nf_conntrack_get(skb->nfct); @@ -6022,71 +4589,20 @@ diff -Nurb linux.stock/net/core/skbuff.c linux/net/core/skbuff.c #endif return n; } -@@ -436,6 +448,10 @@ +@@ -436,6 +448,10 @@ static void copy_skb_header(struct sk_bu + nf_conntrack_get(new->nfct); #ifdef CONFIG_NETFILTER_DEBUG new->nf_debug=old->nf_debug; - #endif ++#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; -@@ -722,8 +738,8 @@ - /* 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)) -+ /* Copy the linear data and header. */ -+ if (skb_copy_bits(skb, -newheadroom, n->head, newheadroom + skb->len)) - BUG(); - - copy_skb_header(n, skb); -diff -Nurb linux.stock/net/ipv4/ip_output.c linux/net/ipv4/ip_output.c ---- linux.stock/net/ipv4/ip_output.c 2003-10-14 04:09:33.000000000 -0400 -+++ linux/net/ipv4/ip_output.c 2004-07-10 23:46:39.000000000 -0400 -@@ -879,6 +879,10 @@ - /* 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 -diff -Nurb linux.stock/net/ipv4/netfilter/Config.in linux/net/ipv4/netfilter/Config.in ---- linux.stock/net/ipv4/netfilter/Config.in 2004-07-10 23:30:19.000000000 -0400 -+++ linux/net/ipv4/netfilter/Config.in 2004-07-10 23:46:39.000000000 -0400 -@@ -83,6 +83,9 @@ - dep_tristate ' String match support (EXPERIMENTAL)' CONFIG_IP_NF_MATCH_STRING $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 -diff -Nurb linux.stock/net/ipv4/netfilter/Makefile linux/net/ipv4/netfilter/Makefile ---- linux.stock/net/ipv4/netfilter/Makefile 2004-07-10 23:30:19.000000000 -0400 -+++ linux/net/ipv4/netfilter/Makefile 2004-07-10 23:46:39.000000000 -0400 -@@ -149,6 +149,8 @@ - obj-$(CONFIG_IP_NF_MATCH_TCPMSS) += ipt_tcpmss.o - obj-$(CONFIG_IP_NF_MATCH_REALM) += ipt_realm.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 -diff -Nurb linux.stock/net/ipv4/netfilter/ip_tables.c linux/net/ipv4/netfilter/ip_tables.c ---- linux.stock/net/ipv4/netfilter/ip_tables.c 2004-07-10 23:29:53.000000000 -0400 -+++ linux/net/ipv4/netfilter/ip_tables.c 2004-07-10 23:46:39.000000000 -0400 -@@ -121,12 +121,19 @@ + #ifdef CONFIG_NET_SCHED +--- linux-2.4.21/net/ipv4/netfilter/ip_tables.c Fri Jun 13 16:51:39 2003 ++++ linux-2.4.21-ebt-brnf-3/net/ipv4/netfilter/ip_tables.c Fri Aug 8 01:09:06 2003 +@@ -121,12 +121,19 @@ static LIST_HEAD(ipt_tables); static inline int ip_packet_match(const struct iphdr *ip, const char *indev, @@ -6106,7 +4622,7 @@ diff -Nurb linux.stock/net/ipv4/netfilter/ip_tables.c linux/net/ipv4/netfilter/i #define FWINV(bool,invflg) ((bool) ^ !!(ipinfo->invflags & invflg)) -@@ -156,7 +163,15 @@ +@@ -156,7 +163,15 @@ ip_packet_match(const struct iphdr *ip, & ((const unsigned long *)ipinfo->iniface_mask)[i]; } @@ -6123,7 +4639,7 @@ diff -Nurb linux.stock/net/ipv4/netfilter/ip_tables.c linux/net/ipv4/netfilter/i dprintf("VIA in mismatch (%s vs %s).%s\n", indev, ipinfo->iniface, ipinfo->invflags&IPT_INV_VIA_IN ?" (INV)":""); -@@ -169,7 +184,15 @@ +@@ -169,7 +184,15 @@ ip_packet_match(const struct iphdr *ip, & ((const unsigned long *)ipinfo->outiface_mask)[i]; } @@ -6140,7 +4656,7 @@ diff -Nurb linux.stock/net/ipv4/netfilter/ip_tables.c linux/net/ipv4/netfilter/i dprintf("VIA out mismatch (%s vs %s).%s\n", outdev, ipinfo->outiface, ipinfo->invflags&IPT_INV_VIA_OUT ?" (INV)":""); -@@ -272,6 +295,9 @@ +@@ -268,6 +291,9 @@ ipt_do_table(struct sk_buff **pskb, /* Initializing verdict to NF_DROP keeps gcc happy. */ unsigned int verdict = NF_DROP; const char *indev, *outdev; @@ -6150,7 +4666,7 @@ diff -Nurb linux.stock/net/ipv4/netfilter/ip_tables.c linux/net/ipv4/netfilter/i void *table_base; struct ipt_entry *e, *back; -@@ -281,6 +307,13 @@ +@@ -277,6 +303,13 @@ ipt_do_table(struct sk_buff **pskb, datalen = (*pskb)->len - ip->ihl * 4; indev = in ? in->name : nulldevname; outdev = out ? out->name : nulldevname; @@ -6164,7 +4680,7 @@ diff -Nurb linux.stock/net/ipv4/netfilter/ip_tables.c linux/net/ipv4/netfilter/i /* 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 -@@ -316,7 +349,15 @@ +@@ -312,7 +345,15 @@ ipt_do_table(struct sk_buff **pskb, IP_NF_ASSERT(e); IP_NF_ASSERT(back); (*pskb)->nfcache |= e->nfcache; @@ -6181,11 +4697,23 @@ diff -Nurb linux.stock/net/ipv4/netfilter/ip_tables.c linux/net/ipv4/netfilter/i struct ipt_entry_target *t; if (IPT_MATCH_ITERATE(e, do_match, -diff -Nurb linux.stock/net/ipv4/netfilter/ipt_LOG.c linux/net/ipv4/netfilter/ipt_LOG.c ---- linux.stock/net/ipv4/netfilter/ipt_LOG.c 2004-07-10 23:29:56.000000000 -0400 -+++ linux/net/ipv4/netfilter/ipt_LOG.c 2004-07-10 23:46:39.000000000 -0400 -@@ -319,6 +319,18 @@ - prefix == NULL ? loginfo->prefix : prefix, +--- linux-2.4.21/net/ipv4/ip_output.c Fri Nov 29 00:53:15 2002 ++++ linux-2.4.21-ebt-brnf-3/net/ipv4/ip_output.c Fri Aug 8 01:09:06 2003 +@@ -879,6 +879,10 @@ int ip_fragment(struct sk_buff *skb, int + /* Connection association is same as pre-frag packet */ + skb2->nfct = skb->nfct; + nf_conntrack_get(skb2->nfct); ++#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) ++ skb2->nf_bridge = skb->nf_bridge; ++ nf_bridge_get(skb2->nf_bridge); ++#endif + #ifdef CONFIG_NETFILTER_DEBUG + skb2->nf_debug = skb->nf_debug; + #endif +--- linux-2.4.21/net/ipv4/netfilter/ipt_LOG.c Mon Feb 25 20:38:14 2002 ++++ linux-2.4.21-ebt-brnf-3/net/ipv4/netfilter/ipt_LOG.c Fri Aug 8 01:09:06 2003 +@@ -289,6 +289,18 @@ ipt_log_target(struct sk_buff **pskb, + loginfo->prefix, in ? in->name : "", out ? out->name : ""); +#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) @@ -6203,9 +4731,678 @@ diff -Nurb linux.stock/net/ipv4/netfilter/ipt_LOG.c linux/net/ipv4/netfilter/ipt if (in && !out) { /* MAC logging for input chain only. */ printk("MAC="); -diff -Nurb linux.stock/net/ipv4/netfilter/ipt_physdev.c linux/net/ipv4/netfilter/ipt_physdev.c ---- linux.stock/net/ipv4/netfilter/ipt_physdev.c 1969-12-31 19:00:00.000000000 -0500 -+++ linux/net/ipv4/netfilter/ipt_physdev.c 2004-07-10 23:46:39.000000000 -0400 +--- linux-2.4.21/net/ipv4/netfilter/Makefile Fri Jun 13 16:51:39 2003 ++++ linux-2.4.21-ebt-brnf-3/net/ipv4/netfilter/Makefile Fri Aug 8 01:09:06 2003 +@@ -84,6 +84,8 @@ obj-$(CONFIG_IP_NF_MATCH_CONNTRACK) += i + obj-$(CONFIG_IP_NF_MATCH_UNCLEAN) += ipt_unclean.o + obj-$(CONFIG_IP_NF_MATCH_TCPMSS) += ipt_tcpmss.o + ++obj-$(CONFIG_IP_NF_MATCH_PHYSDEV) += ipt_physdev.o ++ + # targets + obj-$(CONFIG_IP_NF_TARGET_REJECT) += ipt_REJECT.o + obj-$(CONFIG_IP_NF_TARGET_MIRROR) += ipt_MIRROR.o +@@ -100,6 +102,7 @@ obj-$(CONFIG_IP_NF_TARGET_TCPMSS) += ipt + + # generic ARP tables + obj-$(CONFIG_IP_NF_ARPTABLES) += arp_tables.o ++obj-$(CONFIG_IP_NF_ARP_MANGLE) += arpt_mangle.o + + # just filtering instance of ARP tables for now + obj-$(CONFIG_IP_NF_ARPFILTER) += arptable_filter.o +--- linux-2.4.21/net/ipv4/netfilter/Config.in Fri Jun 13 16:51:39 2003 ++++ linux-2.4.21-ebt-brnf-3/net/ipv4/netfilter/Config.in Fri Aug 8 01:09:06 2003 +@@ -43,6 +43,9 @@ if [ "$CONFIG_IP_NF_IPTABLES" != "n" ]; + dep_tristate ' Unclean match support (EXPERIMENTAL)' CONFIG_IP_NF_MATCH_UNCLEAN $CONFIG_IP_NF_IPTABLES + dep_tristate ' Owner match support (EXPERIMENTAL)' CONFIG_IP_NF_MATCH_OWNER $CONFIG_IP_NF_IPTABLES + fi ++ if [ "$CONFIG_BRIDGE" != "n" ]; then ++ dep_tristate ' Physdev match support' CONFIG_IP_NF_MATCH_PHYSDEV ++ fi + # The targets + dep_tristate ' Packet filtering' CONFIG_IP_NF_FILTER $CONFIG_IP_NF_IPTABLES + if [ "$CONFIG_IP_NF_FILTER" != "n" ]; then +--- /dev/null Thu Aug 24 11:00:32 2000 ++++ linux-2.4.21-ebt-brnf-3/net/bridge/br_netfilter.c Fri Aug 8 01:09:06 2003 +@@ -0,0 +1,636 @@ ++/* ++ * Handle firewalling ++ * Linux ethernet bridge ++ * ++ * Authors: ++ * Lennert Buytenhek <buytenh@gnu.org> ++ * Bart De Schuymer <bdschuym@pandora.be> ++ * ++ * This program is free software; you can redistribute it and/or ++ * modify it under the terms of the GNU General Public License ++ * as published by the Free Software Foundation; either version ++ * 2 of the License, or (at your option) any later version. ++ * ++ * Lennert dedicates this file to Kerstin Wurdinger. ++ */ ++ ++#include <linux/module.h> ++#include <linux/kernel.h> ++#include <linux/ip.h> ++#include <linux/netdevice.h> ++#include <linux/skbuff.h> ++#include <linux/if_ether.h> ++#include <linux/netfilter_bridge.h> ++#include <linux/netfilter_ipv4.h> ++#include <linux/in_route.h> ++#include <net/ip.h> ++#include <asm/uaccess.h> ++#include <asm/checksum.h> ++#include "br_private.h" ++ ++ ++#define skb_origaddr(skb) (((struct bridge_skb_cb *) \ ++ (skb->cb))->daddr.ipv4) ++#define store_orig_dstaddr(skb) (skb_origaddr(skb) = (skb)->nh.iph->daddr) ++#define dnat_took_place(skb) (skb_origaddr(skb) != (skb)->nh.iph->daddr) ++#define clear_cb(skb) (memset(&skb_origaddr(skb), 0, \ ++ sizeof(struct bridge_skb_cb))) ++ ++#define has_bridge_parent(device) ((device)->br_port != NULL) ++#define bridge_parent(device) (&((device)->br_port->br->dev)) ++ ++/* We need these fake structures to make netfilter happy -- ++ * lots of places assume that skb->dst != NULL, which isn't ++ * all that unreasonable. ++ * ++ * Currently, we fill in the PMTU entry because netfilter ++ * refragmentation needs it, and the rt_flags entry because ++ * ipt_REJECT needs it. Future netfilter modules might ++ * require us to fill additional fields. ++ */ ++static struct net_device __fake_net_device = { ++ .hard_header_len = ETH_HLEN ++}; ++ ++static struct rtable __fake_rtable = { ++ u: { ++ dst: { ++ __refcnt: ATOMIC_INIT(1), ++ dev: &__fake_net_device, ++ pmtu: 1500 ++ } ++ }, ++ ++ rt_flags: 0 ++}; ++ ++ ++/* PF_BRIDGE/PRE_ROUTING *********************************************/ ++static void __br_dnat_complain(void) ++{ ++ static unsigned long last_complaint = 0; ++ ++ if (jiffies - last_complaint >= 5 * HZ) { ++ printk(KERN_WARNING "Performing cross-bridge DNAT requires IP " ++ "forwarding to be enabled\n"); ++ last_complaint = jiffies; ++ } ++} ++ ++ ++/* This requires some explaining. If DNAT has taken place, ++ * we will need to fix up the destination Ethernet address, ++ * and this is a tricky process. ++ * ++ * There are two cases to consider: ++ * 1. The packet was DNAT'ed to a device in the same bridge ++ * port group as it was received on. We can still bridge ++ * the packet. ++ * 2. The packet was DNAT'ed to a different device, either ++ * a non-bridged device or another bridge port group. ++ * The packet will need to be routed. ++ * ++ * The correct way of distinguishing between these two cases is to ++ * call ip_route_input() and to look at skb->dst->dev, which is ++ * changed to the destination device if ip_route_input() succeeds. ++ * ++ * Let us first consider the case that ip_route_input() succeeds: ++ * ++ * If skb->dst->dev equals the logical bridge device the packet ++ * came in on, we can consider this bridging. We then call ++ * skb->dst->output() which will make the packet enter br_nf_local_out() ++ * not much later. In that function it is assured that the iptables ++ * FORWARD chain is traversed for the packet. ++ * ++ * Otherwise, the packet is considered to be routed and we just ++ * change the destination MAC address so that the packet will ++ * later be passed up to the IP stack to be routed. ++ * ++ * Let us now consider the case that ip_route_input() fails: ++ * ++ * After a "echo '0' > /proc/sys/net/ipv4/ip_forward" ip_route_input() ++ * will fail, while __ip_route_output_key() will return success. The source ++ * address for __ip_route_output_key() is set to zero, so __ip_route_output_key ++ * thinks we're handling a locally generated packet and won't care ++ * if IP forwarding is allowed. We send a warning message to the users's ++ * log telling her to put IP forwarding on. ++ * ++ * ip_route_input() will also fail if there is no route available. ++ * In that case we just drop the packet. ++ * ++ * --Lennert, 20020411 ++ * --Bart, 20020416 (updated) ++ * --Bart, 20021007 (updated) ++ */ ++ ++static int br_nf_pre_routing_finish_bridge(struct sk_buff *skb) ++{ ++#ifdef CONFIG_NETFILTER_DEBUG ++ skb->nf_debug |= (1 << NF_BR_PRE_ROUTING) | (1 << NF_BR_FORWARD); ++#endif ++ ++ if (skb->pkt_type == PACKET_OTHERHOST) { ++ skb->pkt_type = PACKET_HOST; ++ skb->nf_bridge->mask |= BRNF_PKT_TYPE; ++ } ++ ++ skb->dev = bridge_parent(skb->dev); ++ skb->dst->output(skb); ++ return 0; ++} ++ ++static int br_nf_pre_routing_finish(struct sk_buff *skb) ++{ ++ struct net_device *dev = skb->dev; ++ struct iphdr *iph = skb->nh.iph; ++ struct nf_bridge_info *nf_bridge = skb->nf_bridge; ++ ++#ifdef CONFIG_NETFILTER_DEBUG ++ skb->nf_debug ^= (1 << NF_BR_PRE_ROUTING); ++#endif ++ ++ if (nf_bridge->mask & BRNF_PKT_TYPE) { ++ skb->pkt_type = PACKET_OTHERHOST; ++ nf_bridge->mask ^= BRNF_PKT_TYPE; ++ } ++ ++ if (dnat_took_place(skb)) { ++ if (ip_route_input(skb, iph->daddr, iph->saddr, iph->tos, ++ dev)) { ++ struct rtable *rt; ++ ++ if (!ip_route_output(&rt, iph->daddr, 0, iph->tos, 0)) { ++ /* Bridged-and-DNAT'ed traffic doesn't ++ * require ip_forwarding. ++ */ ++ if (((struct dst_entry *)rt)->dev == dev) { ++ skb->dst = (struct dst_entry *)rt; ++ goto bridged_dnat; ++ } ++ __br_dnat_complain(); ++ dst_release((struct dst_entry *)rt); ++ } ++ kfree_skb(skb); ++ return 0; ++ } else { ++ if (skb->dst->dev == dev) { ++bridged_dnat: ++ /* Tell br_nf_local_out this is a ++ * bridged frame ++ */ ++ nf_bridge->mask |= BRNF_BRIDGED_DNAT; ++ skb->dev = nf_bridge->physindev; ++ clear_cb(skb); ++ NF_HOOK_THRESH(PF_BRIDGE, NF_BR_PRE_ROUTING, ++ skb, skb->dev, NULL, ++ br_nf_pre_routing_finish_bridge, ++ 1); ++ return 0; ++ } ++ memcpy(skb->mac.ethernet->h_dest, dev->dev_addr, ++ ETH_ALEN); ++ } ++ } else { ++ skb->dst = (struct dst_entry *)&__fake_rtable; ++ dst_hold(skb->dst); ++ } ++ ++ clear_cb(skb); ++ skb->dev = nf_bridge->physindev; ++ NF_HOOK_THRESH(PF_BRIDGE, NF_BR_PRE_ROUTING, skb, skb->dev, NULL, ++ br_handle_frame_finish, 1); ++ ++ return 0; ++} ++ ++/* Replicate the checks that IPv4 does on packet reception. ++ * Set skb->dev to the bridge device (i.e. parent of the ++ * receiving device) to make netfilter happy, the REDIRECT ++ * target in particular. Save the original destination IP ++ * address to be able to detect DNAT afterwards. ++ */ ++static unsigned int br_nf_pre_routing(unsigned int hook, struct sk_buff **pskb, ++ const struct net_device *in, const struct net_device *out, ++ int (*okfn)(struct sk_buff *)) ++{ ++ struct iphdr *iph; ++ __u32 len; ++ struct sk_buff *skb; ++ struct nf_bridge_info *nf_bridge; ++ ++ if ((*pskb)->protocol != __constant_htons(ETH_P_IP)) ++ return NF_ACCEPT; ++ ++ if ((skb = skb_share_check(*pskb, GFP_ATOMIC)) == NULL) ++ goto out; ++ ++ if (!pskb_may_pull(skb, sizeof(struct iphdr))) ++ goto inhdr_error; ++ ++ iph = skb->nh.iph; ++ if (iph->ihl < 5 || iph->version != 4) ++ goto inhdr_error; ++ ++ if (!pskb_may_pull(skb, 4*iph->ihl)) ++ goto inhdr_error; ++ ++ iph = skb->nh.iph; ++ if (ip_fast_csum((__u8 *)iph, iph->ihl) != 0) ++ goto inhdr_error; ++ ++ len = ntohs(iph->tot_len); ++ if (skb->len < len || len < 4*iph->ihl) ++ goto inhdr_error; ++ ++ if (skb->len > len) { ++ __pskb_trim(skb, len); ++ if (skb->ip_summed == CHECKSUM_HW) ++ skb->ip_summed = CHECKSUM_NONE; ++ } ++ ++#ifdef CONFIG_NETFILTER_DEBUG ++ skb->nf_debug ^= (1 << NF_IP_PRE_ROUTING); ++#endif ++ if ((nf_bridge = nf_bridge_alloc(skb)) == NULL) ++ return NF_DROP; ++ ++ if (skb->pkt_type == PACKET_OTHERHOST) { ++ skb->pkt_type = PACKET_HOST; ++ nf_bridge->mask |= BRNF_PKT_TYPE; ++ } ++ ++ nf_bridge->physindev = skb->dev; ++ skb->dev = bridge_parent(skb->dev); ++ store_orig_dstaddr(skb); ++ ++ NF_HOOK(PF_INET, NF_IP_PRE_ROUTING, skb, skb->dev, NULL, ++ br_nf_pre_routing_finish); ++ ++ return NF_STOLEN; ++ ++inhdr_error: ++// IP_INC_STATS_BH(IpInHdrErrors); ++out: ++ return NF_DROP; ++} ++ ++ ++/* PF_BRIDGE/LOCAL_IN ************************************************/ ++/* The packet is locally destined, which requires a real ++ * dst_entry, so detach the fake one. On the way up, the ++ * packet would pass through PRE_ROUTING again (which already ++ * took place when the packet entered the bridge), but we ++ * register an IPv4 PRE_ROUTING 'sabotage' hook that will ++ * prevent this from happening. ++ */ ++static unsigned int br_nf_local_in(unsigned int hook, struct sk_buff **pskb, ++ const struct net_device *in, const struct net_device *out, ++ int (*okfn)(struct sk_buff *)) ++{ ++ struct sk_buff *skb = *pskb; ++ ++ if (skb->protocol != __constant_htons(ETH_P_IP)) ++ return NF_ACCEPT; ++ ++ if (skb->dst == (struct dst_entry *)&__fake_rtable) { ++ dst_release(skb->dst); ++ skb->dst = NULL; ++ } ++ ++ return NF_ACCEPT; ++} ++ ++ ++/* PF_BRIDGE/FORWARD *************************************************/ ++static int br_nf_forward_finish(struct sk_buff *skb) ++{ ++ struct nf_bridge_info *nf_bridge = skb->nf_bridge; ++ ++#ifdef CONFIG_NETFILTER_DEBUG ++ skb->nf_debug ^= (1 << NF_BR_FORWARD); ++#endif ++ ++ if (nf_bridge->mask & BRNF_PKT_TYPE) { ++ skb->pkt_type = PACKET_OTHERHOST; ++ nf_bridge->mask ^= BRNF_PKT_TYPE; ++ } ++ ++ NF_HOOK_THRESH(PF_BRIDGE, NF_BR_FORWARD, skb, nf_bridge->physindev, ++ skb->dev, br_forward_finish, 1); ++ ++ return 0; ++} ++ ++/* This is the 'purely bridged' case. We pass the packet to ++ * netfilter with indev and outdev set to the bridge device, ++ * but we are still able to filter on the 'real' indev/outdev ++ * because of the ipt_physdev.c module. ++ */ ++static unsigned int br_nf_forward(unsigned int hook, struct sk_buff **pskb, ++ const struct net_device *in, const struct net_device *out, ++ int (*okfn)(struct sk_buff *)) ++{ ++ struct sk_buff *skb = *pskb; ++ struct nf_bridge_info *nf_bridge; ++ ++ if (skb->protocol != __constant_htons(ETH_P_IP)) ++ return NF_ACCEPT; ++ ++#ifdef CONFIG_NETFILTER_DEBUG ++ skb->nf_debug ^= (1 << NF_BR_FORWARD); ++#endif ++ ++ nf_bridge = skb->nf_bridge; ++ if (skb->pkt_type == PACKET_OTHERHOST) { ++ skb->pkt_type = PACKET_HOST; ++ nf_bridge->mask |= BRNF_PKT_TYPE; ++ } ++ ++ nf_bridge->mask |= BRNF_BRIDGED; /* The physdev module checks on this */ ++ nf_bridge->physoutdev = skb->dev; ++ ++ NF_HOOK(PF_INET, NF_IP_FORWARD, skb, bridge_parent(nf_bridge->physindev), ++ bridge_parent(skb->dev), br_nf_forward_finish); ++ ++ return NF_STOLEN; ++} ++ ++ ++/* PF_BRIDGE/LOCAL_OUT ***********************************************/ ++static int br_nf_local_out_finish(struct sk_buff *skb) ++{ ++#ifdef CONFIG_NETFILTER_DEBUG ++ skb->nf_debug &= ~(1 << NF_BR_LOCAL_OUT); ++#endif ++ ++ NF_HOOK_THRESH(PF_BRIDGE, NF_BR_LOCAL_OUT, skb, NULL, skb->dev, ++ br_forward_finish, NF_BR_PRI_FIRST + 1); ++ ++ return 0; ++} ++ ++ ++/* This function sees both locally originated IP packets and forwarded ++ * IP packets (in both cases the destination device is a bridge ++ * device). It also sees bridged-and-DNAT'ed packets. ++ * To be able to filter on the physical bridge devices (with the ipt_physdev.c ++ * module), we steal packets destined to a bridge device away from the ++ * PF_INET/FORWARD and PF_INET/OUTPUT hook functions, and give them back later, ++ * when we have determined the real output device. This is done in here. ++ * ++ * If (nf_bridge->mask & BRNF_BRIDGED_DNAT) then the packet is bridged ++ * and we fake the PF_BRIDGE/FORWARD hook. The function br_nf_forward() ++ * will then fake the PF_INET/FORWARD hook. br_nf_local_out() has priority ++ * NF_BR_PRI_FIRST, so no relevant PF_BRIDGE/INPUT functions have been nor ++ * will be executed. ++ * Otherwise, if nf_bridge->physindev is NULL, the bridge-nf code never touched ++ * this packet before, and so the packet was locally originated. We fake ++ * the PF_INET/LOCAL_OUT hook. ++ * Finally, if nf_bridge->physindev isn't NULL, then the packet was IP routed, ++ * so we fake the PF_INET/FORWARD hook. ipv4_sabotage_out() makes sure ++ * even routed packets that didn't arrive on a bridge interface have their ++ * nf_bridge->physindev set. ++ */ ++ ++static unsigned int br_nf_local_out(unsigned int hook, struct sk_buff **pskb, ++ const struct net_device *in, const struct net_device *out, ++ int (*_okfn)(struct sk_buff *)) ++{ ++ int (*okfn)(struct sk_buff *skb); ++ struct net_device *realindev; ++ struct sk_buff *skb = *pskb; ++ struct nf_bridge_info *nf_bridge; ++ ++ if (skb->protocol != __constant_htons(ETH_P_IP)) ++ return NF_ACCEPT; ++ ++ /* Sometimes we get packets with NULL ->dst here (for example, ++ * running a dhcp client daemon triggers this). ++ */ ++ if (skb->dst == NULL) ++ return NF_ACCEPT; ++ ++ nf_bridge = skb->nf_bridge; ++ nf_bridge->physoutdev = skb->dev; ++ ++ realindev = nf_bridge->physindev; ++ ++ /* Bridged, take PF_BRIDGE/FORWARD. ++ * (see big note in front of br_nf_pre_routing_finish) ++ */ ++ if (nf_bridge->mask & BRNF_BRIDGED_DNAT) { ++ okfn = br_forward_finish; ++ ++ if (nf_bridge->mask & BRNF_PKT_TYPE) { ++ skb->pkt_type = PACKET_OTHERHOST; ++ nf_bridge->mask ^= BRNF_PKT_TYPE; ++ } ++ ++ NF_HOOK(PF_BRIDGE, NF_BR_FORWARD, skb, realindev, ++ skb->dev, okfn); ++ } else { ++ okfn = br_nf_local_out_finish; ++ /* IP forwarded traffic has a physindev, locally ++ * generated traffic hasn't. ++ */ ++ if (realindev != NULL) { ++ if (((nf_bridge->mask & BRNF_DONT_TAKE_PARENT) == 0) && ++ has_bridge_parent(realindev)) ++ realindev = bridge_parent(realindev); ++ ++ NF_HOOK_THRESH(PF_INET, NF_IP_FORWARD, skb, realindev, ++ bridge_parent(skb->dev), okfn, ++ NF_IP_PRI_BRIDGE_SABOTAGE_FORWARD + 1); ++ } else { ++#ifdef CONFIG_NETFILTER_DEBUG ++ skb->nf_debug ^= (1 << NF_IP_LOCAL_OUT); ++#endif ++ ++ NF_HOOK_THRESH(PF_INET, NF_IP_LOCAL_OUT, skb, realindev, ++ bridge_parent(skb->dev), okfn, ++ NF_IP_PRI_BRIDGE_SABOTAGE_LOCAL_OUT + 1); ++ } ++ } ++ ++ return NF_STOLEN; ++} ++ ++ ++/* PF_BRIDGE/POST_ROUTING ********************************************/ ++static unsigned int br_nf_post_routing(unsigned int hook, struct sk_buff **pskb, ++ const struct net_device *in, const struct net_device *out, ++ int (*okfn)(struct sk_buff *)) ++{ ++ struct sk_buff *skb = *pskb; ++ struct nf_bridge_info *nf_bridge = (*pskb)->nf_bridge; ++ ++ /* Be very paranoid. Must be a device driver bug. */ ++ if (skb->mac.raw < skb->head || skb->mac.raw + ETH_HLEN > skb->data) { ++ printk(KERN_CRIT "br_netfilter: Argh!! br_nf_post_routing: " ++ "bad mac.raw pointer."); ++ if (skb->dev != NULL) { ++ printk("[%s]", skb->dev->name); ++ if (has_bridge_parent(skb->dev)) ++ printk("[%s]", bridge_parent(skb->dev)->name); ++ } ++ printk("\n"); ++ return NF_ACCEPT; ++ } ++ ++ if (skb->protocol != __constant_htons(ETH_P_IP)) ++ return NF_ACCEPT; ++ ++ /* Sometimes we get packets with NULL ->dst here (for example, ++ * running a dhcp client daemon triggers this). ++ */ ++ if (skb->dst == NULL) ++ return NF_ACCEPT; ++ ++#ifdef CONFIG_NETFILTER_DEBUG ++ skb->nf_debug ^= (1 << NF_IP_POST_ROUTING); ++#endif ++ ++ /* We assume any code from br_dev_queue_push_xmit onwards doesn't care ++ * about the value of skb->pkt_type. ++ */ ++ if (skb->pkt_type == PACKET_OTHERHOST) { ++ skb->pkt_type = PACKET_HOST; ++ nf_bridge->mask |= BRNF_PKT_TYPE; ++ } ++ ++ memcpy(nf_bridge->hh, skb->data - 16, 16); ++ ++ NF_HOOK(PF_INET, NF_IP_POST_ROUTING, skb, NULL, ++ bridge_parent(skb->dev), br_dev_queue_push_xmit); ++ ++ return NF_STOLEN; ++} ++ ++ ++/* IPv4/SABOTAGE *****************************************************/ ++ ++/* Don't hand locally destined packets to PF_INET/PRE_ROUTING ++ * for the second time. ++ */ ++static unsigned int ipv4_sabotage_in(unsigned int hook, struct sk_buff **pskb, ++ const struct net_device *in, const struct net_device *out, ++ int (*okfn)(struct sk_buff *)) ++{ ++ if (in->hard_start_xmit == br_dev_xmit && ++ okfn != br_nf_pre_routing_finish) { ++ okfn(*pskb); ++ return NF_STOLEN; ++ } ++ ++ return NF_ACCEPT; ++} ++ ++/* Postpone execution of PF_INET/FORWARD, PF_INET/LOCAL_OUT ++ * and PF_INET/POST_ROUTING until we have done the forwarding ++ * decision in the bridge code and have determined skb->physoutdev. ++ */ ++static unsigned int ipv4_sabotage_out(unsigned int hook, struct sk_buff **pskb, ++ const struct net_device *in, const struct net_device *out, ++ int (*okfn)(struct sk_buff *)) ++{ ++ if (out->hard_start_xmit == br_dev_xmit && ++ okfn != br_nf_forward_finish && ++ okfn != br_nf_local_out_finish && ++ okfn != br_dev_queue_push_xmit) { ++ struct sk_buff *skb = *pskb; ++ struct nf_bridge_info *nf_bridge; ++ ++ if (!skb->nf_bridge && !nf_bridge_alloc(skb)) ++ return NF_DROP; ++ ++ nf_bridge = skb->nf_bridge; ++ ++ /* This frame will arrive on PF_BRIDGE/LOCAL_OUT and we ++ * will need the indev then. For a brouter, the real indev ++ * can be a bridge port, so we make sure br_nf_local_out() ++ * doesn't use the bridge parent of the indev by using ++ * the BRNF_DONT_TAKE_PARENT mask. ++ */ ++ if (hook == NF_IP_FORWARD && nf_bridge->physindev == NULL) { ++ nf_bridge->mask &= BRNF_DONT_TAKE_PARENT; ++ nf_bridge->physindev = (struct net_device *)in; ++ } ++ okfn(skb); ++ return NF_STOLEN; ++ } ++ ++ return NF_ACCEPT; ++} ++ ++/* For br_nf_local_out we need (prio = NF_BR_PRI_FIRST), to insure that innocent ++ * PF_BRIDGE/NF_BR_LOCAL_OUT functions don't get bridged traffic as input. ++ * For br_nf_post_routing, we need (prio = NF_BR_PRI_LAST), because ++ * ip_refrag() can return NF_STOLEN. ++ */ ++static struct nf_hook_ops br_nf_ops[] = { ++ { .hook = br_nf_pre_routing, ++ .pf = PF_BRIDGE, ++ .hooknum = NF_BR_PRE_ROUTING, ++ .priority = NF_BR_PRI_BRNF, }, ++ { .hook = br_nf_local_in, ++ .pf = PF_BRIDGE, ++ .hooknum = NF_BR_LOCAL_IN, ++ .priority = NF_BR_PRI_BRNF, }, ++ { .hook = br_nf_forward, ++ .pf = PF_BRIDGE, ++ .hooknum = NF_BR_FORWARD, ++ .priority = NF_BR_PRI_BRNF, }, ++ { .hook = br_nf_local_out, ++ .pf = PF_BRIDGE, ++ .hooknum = NF_BR_LOCAL_OUT, ++ .priority = NF_BR_PRI_FIRST, }, ++ { .hook = br_nf_post_routing, ++ .pf = PF_BRIDGE, ++ .hooknum = NF_BR_POST_ROUTING, ++ .priority = NF_BR_PRI_LAST, }, ++ { .hook = ipv4_sabotage_in, ++ .pf = PF_INET, ++ .hooknum = NF_IP_PRE_ROUTING, ++ .priority = NF_IP_PRI_FIRST, }, ++ { .hook = ipv4_sabotage_out, ++ .pf = PF_INET, ++ .hooknum = NF_IP_FORWARD, ++ .priority = NF_IP_PRI_BRIDGE_SABOTAGE_FORWARD, }, ++ { .hook = ipv4_sabotage_out, ++ .pf = PF_INET, ++ .hooknum = NF_IP_LOCAL_OUT, ++ .priority = NF_IP_PRI_BRIDGE_SABOTAGE_LOCAL_OUT, }, ++ { .hook = ipv4_sabotage_out, ++ .pf = PF_INET, ++ .hooknum = NF_IP_POST_ROUTING, ++ .priority = NF_IP_PRI_FIRST, }, ++}; ++ ++int br_netfilter_init(void) ++{ ++ int i; ++ ++ for (i = 0; i < ARRAY_SIZE(br_nf_ops); i++) { ++ int ret; ++ ++ if ((ret = nf_register_hook(&br_nf_ops[i])) >= 0) ++ continue; ++ ++ while (i--) ++ nf_unregister_hook(&br_nf_ops[i]); ++ ++ return ret; ++ } ++ ++ printk(KERN_NOTICE "Bridge firewalling registered\n"); ++ ++ return 0; ++} ++ ++void br_netfilter_fini(void) ++{ ++ int i; ++ ++ for (i = ARRAY_SIZE(br_nf_ops) - 1; i >= 0; i--) ++ nf_unregister_hook(&br_nf_ops[i]); ++} +--- /dev/null Thu Aug 24 11:00:32 2000 ++++ linux-2.4.21-ebt-brnf-3/net/ipv4/netfilter/ipt_physdev.c Fri Aug 8 01:09:06 2003 @@ -0,0 +1,127 @@ +/* Kernel module to match the bridge port in and + * out device for IP packets coming into contact with a bridge. */ @@ -6334,3 +5531,30 @@ diff -Nurb linux.stock/net/ipv4/netfilter/ipt_physdev.c linux/net/ipv4/netfilter +module_exit(fini); +MODULE_LICENSE("GPL"); +EXPORT_NO_SYMBOLS; +--- /dev/null Thu Aug 24 11:00:32 2000 ++++ linux-2.4.21-ebt-brnf-3/include/linux/netfilter_ipv4/ipt_physdev.h Fri Aug 8 01:09:06 2003 +@@ -0,0 +1,24 @@ ++#ifndef _IPT_PHYSDEV_H ++#define _IPT_PHYSDEV_H ++ ++#ifdef __KERNEL__ ++#include <linux/if.h> ++#endif ++ ++#define IPT_PHYSDEV_OP_IN 0x01 ++#define IPT_PHYSDEV_OP_OUT 0x02 ++#define IPT_PHYSDEV_OP_BRIDGED 0x04 ++#define IPT_PHYSDEV_OP_ISIN 0x08 ++#define IPT_PHYSDEV_OP_ISOUT 0x10 ++#define IPT_PHYSDEV_OP_MASK (0x20 - 1) ++ ++struct ipt_physdev_info { ++ u_int8_t invert; ++ u_int8_t bitmask; ++ char physindev[IFNAMSIZ]; ++ char in_mask[IFNAMSIZ]; ++ char physoutdev[IFNAMSIZ]; ++ char out_mask[IFNAMSIZ]; ++}; ++ ++#endif /*_IPT_PHYSDEV_H*/ |