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-rw-r--r--include/linux/netfilter_bridge/ebt_802_3.h69
-rw-r--r--include/linux/netfilter_bridge/ebt_among.h65
-rw-r--r--include/linux/netfilter_bridge/ebt_arp.h32
-rw-r--r--include/linux/netfilter_bridge/ebt_arpreply.h11
-rw-r--r--include/linux/netfilter_bridge/ebt_ip.h43
-rw-r--r--include/linux/netfilter_bridge/ebt_limit.h23
-rw-r--r--include/linux/netfilter_bridge/ebt_log.h17
-rw-r--r--include/linux/netfilter_bridge/ebt_mark_m.h15
-rw-r--r--include/linux/netfilter_bridge/ebt_mark_t.h12
-rw-r--r--include/linux/netfilter_bridge/ebt_nat.h13
-rw-r--r--include/linux/netfilter_bridge/ebt_pkttype.h11
-rw-r--r--include/linux/netfilter_bridge/ebt_redirect.h11
-rw-r--r--include/linux/netfilter_bridge/ebt_stp.h46
-rw-r--r--include/linux/netfilter_bridge/ebt_ulog.h36
-rw-r--r--include/linux/netfilter_bridge/ebt_vlan.h20
-rw-r--r--include/linux/netfilter_bridge/ebtables.h363
16 files changed, 787 insertions, 0 deletions
diff --git a/include/linux/netfilter_bridge/ebt_802_3.h b/include/linux/netfilter_bridge/ebt_802_3.h
new file mode 100644
index 000000000000..b9f712c14a0a
--- /dev/null
+++ b/include/linux/netfilter_bridge/ebt_802_3.h
@@ -0,0 +1,69 @@
+#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;
+};
+
+#ifdef __KERNEL__
+#include <linux/skbuff.h>
+
+static inline struct ebt_802_3_hdr *ebt_802_3_hdr(const struct sk_buff *skb)
+{
+ return (struct ebt_802_3_hdr *)skb->mac.raw;
+}
+#endif
+
+struct ebt_802_3_info
+{
+ uint8_t sap;
+ uint16_t type;
+ uint8_t bitmask;
+ uint8_t invflags;
+};
+
+#endif
diff --git a/include/linux/netfilter_bridge/ebt_among.h b/include/linux/netfilter_bridge/ebt_among.h
new file mode 100644
index 000000000000..307c1fed8511
--- /dev/null
+++ b/include/linux/netfilter_bridge/ebt_among.h
@@ -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 --git a/include/linux/netfilter_bridge/ebt_arp.h b/include/linux/netfilter_bridge/ebt_arp.h
new file mode 100644
index 000000000000..537ec6b487a2
--- /dev/null
+++ b/include/linux/netfilter_bridge/ebt_arp.h
@@ -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 --git a/include/linux/netfilter_bridge/ebt_arpreply.h b/include/linux/netfilter_bridge/ebt_arpreply.h
new file mode 100644
index 000000000000..96a8339960e0
--- /dev/null
+++ b/include/linux/netfilter_bridge/ebt_arpreply.h
@@ -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 --git a/include/linux/netfilter_bridge/ebt_ip.h b/include/linux/netfilter_bridge/ebt_ip.h
new file mode 100644
index 000000000000..7247385cdcb1
--- /dev/null
+++ b/include/linux/netfilter_bridge/ebt_ip.h
@@ -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 --git a/include/linux/netfilter_bridge/ebt_limit.h b/include/linux/netfilter_bridge/ebt_limit.h
new file mode 100644
index 000000000000..d8b65000afe4
--- /dev/null
+++ b/include/linux/netfilter_bridge/ebt_limit.h
@@ -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 --git a/include/linux/netfilter_bridge/ebt_log.h b/include/linux/netfilter_bridge/ebt_log.h
new file mode 100644
index 000000000000..358fbc84fb59
--- /dev/null
+++ b/include/linux/netfilter_bridge/ebt_log.h
@@ -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 --git a/include/linux/netfilter_bridge/ebt_mark_m.h b/include/linux/netfilter_bridge/ebt_mark_m.h
new file mode 100644
index 000000000000..301524ff1065
--- /dev/null
+++ b/include/linux/netfilter_bridge/ebt_mark_m.h
@@ -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 --git a/include/linux/netfilter_bridge/ebt_mark_t.h b/include/linux/netfilter_bridge/ebt_mark_t.h
new file mode 100644
index 000000000000..110fec6a40a2
--- /dev/null
+++ b/include/linux/netfilter_bridge/ebt_mark_t.h
@@ -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, EBT_CONTINUE or EBT_RETURN */
+ int target;
+};
+#define EBT_MARK_TARGET "mark"
+
+#endif
diff --git a/include/linux/netfilter_bridge/ebt_nat.h b/include/linux/netfilter_bridge/ebt_nat.h
new file mode 100644
index 000000000000..26fd90da4cd6
--- /dev/null
+++ b/include/linux/netfilter_bridge/ebt_nat.h
@@ -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 --git a/include/linux/netfilter_bridge/ebt_pkttype.h b/include/linux/netfilter_bridge/ebt_pkttype.h
new file mode 100644
index 000000000000..0d64bbb29c66
--- /dev/null
+++ b/include/linux/netfilter_bridge/ebt_pkttype.h
@@ -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 --git a/include/linux/netfilter_bridge/ebt_redirect.h b/include/linux/netfilter_bridge/ebt_redirect.h
new file mode 100644
index 000000000000..5c67990fce39
--- /dev/null
+++ b/include/linux/netfilter_bridge/ebt_redirect.h
@@ -0,0 +1,11 @@
+#ifndef __LINUX_BRIDGE_EBT_REDIRECT_H
+#define __LINUX_BRIDGE_EBT_REDIRECT_H
+
+struct ebt_redirect_info
+{
+ /* EBT_ACCEPT, EBT_DROP, EBT_CONTINUE or EBT_RETURN */
+ int target;
+};
+#define EBT_REDIRECT_TARGET "redirect"
+
+#endif
diff --git a/include/linux/netfilter_bridge/ebt_stp.h b/include/linux/netfilter_bridge/ebt_stp.h
new file mode 100644
index 000000000000..e5fd67850f4d
--- /dev/null
+++ b/include/linux/netfilter_bridge/ebt_stp.h
@@ -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 --git a/include/linux/netfilter_bridge/ebt_ulog.h b/include/linux/netfilter_bridge/ebt_ulog.h
new file mode 100644
index 000000000000..b677e2671541
--- /dev/null
+++ b/include/linux/netfilter_bridge/ebt_ulog.h
@@ -0,0 +1,36 @@
+#ifndef _EBT_ULOG_H
+#define _EBT_ULOG_H
+
+#define EBT_ULOG_DEFAULT_NLGROUP 0
+#define EBT_ULOG_DEFAULT_QTHRESHOLD 1
+#define EBT_ULOG_MAXNLGROUPS 32 /* hardcoded netlink max */
+#define EBT_ULOG_PREFIX_LEN 32
+#define EBT_ULOG_MAX_QLEN 50
+#define EBT_ULOG_WATCHER "ulog"
+#define EBT_ULOG_VERSION 1
+
+struct ebt_ulog_info {
+ uint32_t nlgroup;
+ unsigned int cprange;
+ unsigned int qthreshold;
+ char prefix[EBT_ULOG_PREFIX_LEN];
+};
+
+typedef struct ebt_ulog_packet_msg {
+ int version;
+ char indev[IFNAMSIZ];
+ char outdev[IFNAMSIZ];
+ char physindev[IFNAMSIZ];
+ char physoutdev[IFNAMSIZ];
+ char prefix[EBT_ULOG_PREFIX_LEN];
+ struct timeval stamp;
+ unsigned long mark;
+ unsigned int hook;
+ size_t data_len;
+ /* The complete packet, including Ethernet header and perhaps
+ * the VLAN header is appended */
+ unsigned char data[0] __attribute__
+ ((aligned (__alignof__(struct ebt_ulog_info))));
+} ebt_ulog_packet_msg_t;
+
+#endif /* _EBT_ULOG_H */
diff --git a/include/linux/netfilter_bridge/ebt_vlan.h b/include/linux/netfilter_bridge/ebt_vlan.h
new file mode 100644
index 000000000000..cb1fcc41565f
--- /dev/null
+++ b/include/linux/netfilter_bridge/ebt_vlan.h
@@ -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 --git a/include/linux/netfilter_bridge/ebtables.h b/include/linux/netfilter_bridge/ebtables.h
new file mode 100644
index 000000000000..b1a7cc90877b
--- /dev/null
+++ b/include/linux/netfilter_bridge/ebtables.h
@@ -0,0 +1,363 @@
+/*
+ * ebtables
+ *
+ * Authors:
+ * Bart De Schuymer <bdschuym@pandora.be>
+ *
+ * ebtables.c,v 2.0, April, 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_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_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))));
+};
+
+/* {g,s}etsockopt numbers */
+#define EBT_BASE_CTL 128
+
+#define EBT_SO_SET_ENTRIES (EBT_BASE_CTL)
+#define EBT_SO_SET_COUNTERS (EBT_SO_SET_ENTRIES+1)
+#define EBT_SO_SET_MAX (EBT_SO_SET_COUNTERS+1)
+
+#define EBT_SO_GET_INFO (EBT_BASE_CTL)
+#define EBT_SO_GET_ENTRIES (EBT_SO_GET_INFO+1)
+#define EBT_SO_GET_INIT_INFO (EBT_SO_GET_ENTRIES+1)
+#define EBT_SO_GET_INIT_ENTRIES (EBT_SO_GET_INIT_INFO+1)
+#define EBT_SO_GET_MAX (EBT_SO_GET_INIT_ENTRIES+1)
+
+#ifdef __KERNEL__
+
+/* return values for match() functions */
+#define EBT_MATCH 0
+#define EBT_NOMATCH 1
+
+struct ebt_match
+{
+ struct list_head list;
+ const char name[EBT_FUNCTION_MAXNAMELEN];
+ /* 0 == it matches */
+ int (*match)(const struct sk_buff *skb, const struct net_device *in,
+ const struct net_device *out, const void *matchdata,
+ unsigned int datalen);
+ /* 0 == let it in */
+ int (*check)(const char *tablename, unsigned int hookmask,
+ const struct ebt_entry *e, void *matchdata, unsigned int datalen);
+ void (*destroy)(void *matchdata, unsigned int datalen);
+ struct module *me;
+};
+
+struct ebt_watcher
+{
+ struct list_head list;
+ const char name[EBT_FUNCTION_MAXNAMELEN];
+ void (*watcher)(const struct sk_buff *skb, unsigned int hooknr,
+ const struct net_device *in, const struct net_device *out,
+ const void *watcherdata, unsigned int datalen);
+ /* 0 == let it in */
+ int (*check)(const char *tablename, unsigned int hookmask,
+ const struct ebt_entry *e, void *watcherdata, unsigned int datalen);
+ void (*destroy)(void *watcherdata, unsigned int datalen);
+ struct module *me;
+};
+
+struct ebt_target
+{
+ struct list_head list;
+ const char name[EBT_FUNCTION_MAXNAMELEN];
+ /* returns one of the standard verdicts */
+ int (*target)(struct sk_buff **pskb, unsigned int hooknr,
+ const struct net_device *in, const struct net_device *out,
+ const void *targetdata, unsigned int datalen);
+ /* 0 == let it in */
+ int (*check)(const char *tablename, unsigned int hookmask,
+ const struct ebt_entry *e, void *targetdata, unsigned int datalen);
+ void (*destroy)(void *targetdata, unsigned int datalen);
+ struct module *me;
+};
+
+/* used for jumping from and into user defined chains (udc) */
+struct ebt_chainstack
+{
+ struct ebt_entries *chaininfo; /* pointer to chain data */
+ struct ebt_entry *e; /* pointer to entry data */
+ unsigned int n; /* n'th entry */
+};
+
+struct ebt_table_info
+{
+ /* total size of the entries */
+ unsigned int entries_size;
+ unsigned int nentries;
+ /* pointers to the start of the chains */
+ struct ebt_entries *hook_entry[NF_BR_NUMHOOKS];
+ /* room to maintain the stack used for jumping from and into udc */
+ struct ebt_chainstack **chainstack;
+ char *entries;
+ struct ebt_counter counters[0] ____cacheline_aligned;
+};
+
+struct ebt_table
+{
+ struct list_head list;
+ char name[EBT_TABLE_MAXNAMELEN];
+ struct ebt_replace *table;
+ unsigned int valid_hooks;
+ rwlock_t lock;
+ /* e.g. could be the table explicitly only allows certain
+ * matches, targets, ... 0 == let it in */
+ int (*check)(const struct ebt_table_info *info,
+ unsigned int valid_hooks);
+ /* the data used by the kernel */
+ struct ebt_table_info *private;
+ struct module *me;
+};
+
+#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