![Patrick McHardy](/assets/img/avatar_default.png)
- move arp_tables initial table structure definitions to arp_tables.h similar to ip_tables and ip6_tables - use C99 initializers - use initializer macros where possible Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
397 lines
9.9 KiB
C
397 lines
9.9 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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struct xt_entry_match
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{
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union {
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struct {
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u_int16_t match_size;
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/* Used by userspace */
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char name[XT_FUNCTION_MAXNAMELEN-1];
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u_int8_t revision;
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} user;
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struct {
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u_int16_t match_size;
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/* Used inside the kernel */
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struct xt_match *match;
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} kernel;
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/* Total length */
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u_int16_t match_size;
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} u;
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unsigned char data[0];
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};
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struct xt_entry_target
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{
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union {
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struct {
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u_int16_t target_size;
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/* Used by userspace */
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char name[XT_FUNCTION_MAXNAMELEN-1];
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u_int8_t revision;
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} user;
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struct {
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u_int16_t target_size;
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/* Used inside the kernel */
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struct xt_target *target;
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} kernel;
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/* Total length */
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u_int16_t target_size;
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} u;
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unsigned char data[0];
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};
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#define XT_TARGET_INIT(__name, __size) \
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{ \
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.target.u.user = { \
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.target_size = XT_ALIGN(__size), \
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.name = __name, \
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}, \
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}
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struct xt_standard_target
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{
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struct xt_entry_target target;
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int verdict;
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};
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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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#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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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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/* 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 struct xt_match *match,
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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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const struct xt_match *match,
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void *matchinfo,
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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)(const struct xt_match *match, void *matchinfo);
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/* Called when userspace align differs from kernel space one */
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void (*compat_from_user)(void *dst, void *src);
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int (*compat_to_user)(void __user *dst, void *src);
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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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/* Free to use by each match */
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unsigned long data;
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char *table;
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unsigned int matchsize;
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unsigned int compatsize;
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unsigned int hooks;
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unsigned short proto;
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unsigned short family;
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u_int8_t revision;
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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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/* 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 struct xt_target *target,
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const void *targinfo);
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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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const struct xt_target *target,
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void *targinfo,
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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)(const struct xt_target *target, void *targinfo);
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/* Called when userspace align differs from kernel space one */
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void (*compat_from_user)(void *dst, void *src);
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int (*compat_to_user)(void __user *dst, void *src);
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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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char *table;
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unsigned int targetsize;
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unsigned int compatsize;
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unsigned int hooks;
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unsigned short proto;
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unsigned short family;
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u_int8_t revision;
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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(struct xt_target *target);
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extern void xt_unregister_target(struct xt_target *target);
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extern int xt_register_targets(struct xt_target *target, unsigned int n);
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extern void xt_unregister_targets(struct xt_target *target, unsigned int n);
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extern int xt_register_match(struct xt_match *target);
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extern void xt_unregister_match(struct xt_match *target);
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extern int xt_register_matches(struct xt_match *match, unsigned int n);
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extern void xt_unregister_matches(struct xt_match *match, unsigned int n);
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extern int xt_check_match(const struct xt_match *match, unsigned short family,
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unsigned int size, const char *table, unsigned int hook,
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unsigned short proto, int inv_proto);
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extern int xt_check_target(const struct xt_target *target, unsigned short family,
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unsigned int size, const char *table, unsigned int hook,
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unsigned short proto, int inv_proto);
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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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#ifdef CONFIG_COMPAT
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#include <net/compat.h>
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struct compat_xt_entry_match
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{
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union {
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struct {
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u_int16_t match_size;
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char name[XT_FUNCTION_MAXNAMELEN - 1];
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u_int8_t revision;
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} user;
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struct {
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u_int16_t match_size;
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compat_uptr_t match;
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} kernel;
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u_int16_t match_size;
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} u;
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unsigned char data[0];
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};
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struct compat_xt_entry_target
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{
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union {
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struct {
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u_int16_t target_size;
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char name[XT_FUNCTION_MAXNAMELEN - 1];
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u_int8_t revision;
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} user;
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struct {
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u_int16_t target_size;
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compat_uptr_t target;
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} kernel;
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u_int16_t target_size;
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} u;
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unsigned char data[0];
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};
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/* FIXME: this works only on 32 bit tasks
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* need to change whole approach in order to calculate align as function of
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* current task alignment */
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struct compat_xt_counters
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{
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#if defined(CONFIG_X86_64) || defined(CONFIG_IA64)
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u_int32_t cnt[4];
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#else
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u_int64_t cnt[2];
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#endif
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};
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struct compat_xt_counters_info
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{
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char name[XT_TABLE_MAXNAMELEN];
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compat_uint_t num_counters;
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struct compat_xt_counters counters[0];
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};
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#define COMPAT_XT_ALIGN(s) (((s) + (__alignof__(struct compat_xt_counters)-1)) \
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& ~(__alignof__(struct compat_xt_counters)-1))
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extern void xt_compat_lock(int af);
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extern void xt_compat_unlock(int af);
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extern int xt_compat_match_offset(struct xt_match *match);
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extern void xt_compat_match_from_user(struct xt_entry_match *m,
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void **dstptr, int *size);
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extern int xt_compat_match_to_user(struct xt_entry_match *m,
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void __user **dstptr, int *size);
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extern int xt_compat_target_offset(struct xt_target *target);
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extern void xt_compat_target_from_user(struct xt_entry_target *t,
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void **dstptr, int *size);
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extern int xt_compat_target_to_user(struct xt_entry_target *t,
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void __user **dstptr, int *size);
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#endif /* CONFIG_COMPAT */
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#endif /* __KERNEL__ */
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#endif /* _X_TABLES_H */
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