6fbfc96884
x86 defines __alignof__(long long) as 8 yet it gives 4 for a struct containing a long long, ho hum... so my simplified form doesn't work everywhere. So use Harald Welte's original patch, which should work on all platforms. Signed-off-by: David S. Miller <davem@davemloft.net>
239 lines
6.5 KiB
C
239 lines
6.5 KiB
C
#ifndef _X_TABLES_H
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#define _X_TABLES_H
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#define XT_FUNCTION_MAXNAMELEN 30
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#define XT_TABLE_MAXNAMELEN 32
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/* The argument to IPT_SO_GET_REVISION_*. Returns highest revision
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* kernel supports, if >= revision. */
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struct xt_get_revision
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{
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char name[XT_FUNCTION_MAXNAMELEN-1];
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u_int8_t revision;
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};
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/* CONTINUE verdict for targets */
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#define XT_CONTINUE 0xFFFFFFFF
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/* For standard target */
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#define XT_RETURN (-NF_REPEAT - 1)
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/* this is a dummy structure to find out the alignment requirement for a struct
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* containing all the fundamental data types that are used in ipt_entry,
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* ip6t_entry and arpt_entry. This sucks, and it is a hack. It will be my
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* personal pleasure to remove it -HW
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*/
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struct _xt_align
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{
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u_int8_t u8;
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u_int16_t u16;
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u_int32_t u32;
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u_int64_t u64;
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};
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#define XT_ALIGN(s) (((s) + (__alignof__(struct _xt_align)-1)) \
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& ~(__alignof__(struct _xt_align)-1))
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/* Standard return verdict, or do jump. */
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#define XT_STANDARD_TARGET ""
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/* Error verdict. */
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#define XT_ERROR_TARGET "ERROR"
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/*
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* New IP firewall options for [gs]etsockopt at the RAW IP level.
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* Unlike BSD Linux inherits IP options so you don't have to use a raw
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* socket for this. Instead we check rights in the calls. */
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#define XT_BASE_CTL 64 /* base for firewall socket options */
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#define XT_SO_SET_REPLACE (XT_BASE_CTL)
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#define XT_SO_SET_ADD_COUNTERS (XT_BASE_CTL + 1)
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#define XT_SO_SET_MAX XT_SO_SET_ADD_COUNTERS
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#define XT_SO_GET_INFO (XT_BASE_CTL)
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#define XT_SO_GET_ENTRIES (XT_BASE_CTL + 1)
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#define XT_SO_GET_REVISION_MATCH (XT_BASE_CTL + 2)
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#define XT_SO_GET_REVISION_TARGET (XT_BASE_CTL + 3)
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#define XT_SO_GET_MAX XT_SO_GET_REVISION_TARGET
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#define SET_COUNTER(c,b,p) do { (c).bcnt = (b); (c).pcnt = (p); } while(0)
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#define ADD_COUNTER(c,b,p) do { (c).bcnt += (b); (c).pcnt += (p); } while(0)
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struct xt_counters
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{
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u_int64_t pcnt, bcnt; /* Packet and byte counters */
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};
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/* The argument to IPT_SO_ADD_COUNTERS. */
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struct xt_counters_info
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{
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/* Which table. */
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char name[XT_TABLE_MAXNAMELEN];
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unsigned int num_counters;
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/* The counters (actually `number' of these). */
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struct xt_counters counters[0];
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};
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#define XT_INV_PROTO 0x40 /* Invert the sense of PROTO. */
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#ifdef __KERNEL__
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#include <linux/netdevice.h>
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#define ASSERT_READ_LOCK(x)
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#define ASSERT_WRITE_LOCK(x)
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#include <linux/netfilter_ipv4/listhelp.h>
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struct xt_match
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{
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struct list_head list;
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const char name[XT_FUNCTION_MAXNAMELEN-1];
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u_int8_t revision;
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/* Return true or false: return FALSE and set *hotdrop = 1 to
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force immediate packet drop. */
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/* Arguments changed since 2.6.9, as this must now handle
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non-linear skb, using skb_header_pointer and
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skb_ip_make_writable. */
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int (*match)(const struct sk_buff *skb,
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const struct net_device *in,
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const struct net_device *out,
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const void *matchinfo,
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int offset,
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unsigned int protoff,
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int *hotdrop);
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/* Called when user tries to insert an entry of this type. */
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/* Should return true or false. */
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int (*checkentry)(const char *tablename,
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const void *ip,
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void *matchinfo,
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unsigned int matchinfosize,
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unsigned int hook_mask);
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/* Called when entry of this type deleted. */
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void (*destroy)(void *matchinfo, unsigned int matchinfosize);
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/* Set this to THIS_MODULE if you are a module, otherwise NULL */
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struct module *me;
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};
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/* Registration hooks for targets. */
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struct xt_target
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{
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struct list_head list;
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const char name[XT_FUNCTION_MAXNAMELEN-1];
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u_int8_t revision;
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/* Returns verdict. Argument order changed since 2.6.9, as this
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must now handle non-linear skbs, using skb_copy_bits and
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skb_ip_make_writable. */
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unsigned int (*target)(struct sk_buff **pskb,
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const struct net_device *in,
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const struct net_device *out,
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unsigned int hooknum,
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const void *targinfo,
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void *userdata);
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/* Called when user tries to insert an entry of this type:
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hook_mask is a bitmask of hooks from which it can be
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called. */
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/* Should return true or false. */
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int (*checkentry)(const char *tablename,
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const void *entry,
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void *targinfo,
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unsigned int targinfosize,
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unsigned int hook_mask);
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/* Called when entry of this type deleted. */
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void (*destroy)(void *targinfo, unsigned int targinfosize);
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/* Set this to THIS_MODULE if you are a module, otherwise NULL */
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struct module *me;
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};
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/* Furniture shopping... */
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struct xt_table
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{
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struct list_head list;
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/* A unique name... */
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char name[XT_TABLE_MAXNAMELEN];
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/* What hooks you will enter on */
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unsigned int valid_hooks;
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/* Lock for the curtain */
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rwlock_t lock;
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/* Man behind the curtain... */
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//struct ip6t_table_info *private;
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void *private;
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/* Set this to THIS_MODULE if you are a module, otherwise NULL */
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struct module *me;
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int af; /* address/protocol family */
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};
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#include <linux/netfilter_ipv4.h>
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/* The table itself */
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struct xt_table_info
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{
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/* Size per table */
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unsigned int size;
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/* Number of entries: FIXME. --RR */
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unsigned int number;
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/* Initial number of entries. Needed for module usage count */
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unsigned int initial_entries;
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/* Entry points and underflows */
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unsigned int hook_entry[NF_IP_NUMHOOKS];
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unsigned int underflow[NF_IP_NUMHOOKS];
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/* ipt_entry tables: one per CPU */
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char *entries[NR_CPUS];
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};
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extern int xt_register_target(int af, struct xt_target *target);
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extern void xt_unregister_target(int af, struct xt_target *target);
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extern int xt_register_match(int af, struct xt_match *target);
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extern void xt_unregister_match(int af, struct xt_match *target);
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extern int xt_register_table(struct xt_table *table,
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struct xt_table_info *bootstrap,
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struct xt_table_info *newinfo);
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extern void *xt_unregister_table(struct xt_table *table);
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extern struct xt_table_info *xt_replace_table(struct xt_table *table,
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unsigned int num_counters,
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struct xt_table_info *newinfo,
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int *error);
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extern struct xt_match *xt_find_match(int af, const char *name, u8 revision);
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extern struct xt_target *xt_find_target(int af, const char *name, u8 revision);
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extern struct xt_target *xt_request_find_target(int af, const char *name,
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u8 revision);
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extern int xt_find_revision(int af, const char *name, u8 revision, int target,
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int *err);
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extern struct xt_table *xt_find_table_lock(int af, const char *name);
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extern void xt_table_unlock(struct xt_table *t);
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extern int xt_proto_init(int af);
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extern void xt_proto_fini(int af);
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extern struct xt_table_info *xt_alloc_table_info(unsigned int size);
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extern void xt_free_table_info(struct xt_table_info *info);
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#endif /* __KERNEL__ */
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#endif /* _X_TABLES_H */
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