1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
4 #include <linux/kernel.h>
5 #include <linux/types.h>
7 #define XT_FUNCTION_MAXNAMELEN 30
8 #define XT_EXTENSION_MAXNAMELEN 29
9 #define XT_TABLE_MAXNAMELEN 32
11 struct xt_entry_match {
16 /* Used by userspace */
17 char name[XT_EXTENSION_MAXNAMELEN];
23 /* Used inside the kernel */
24 struct xt_match *match;
31 unsigned char data[0];
34 struct xt_entry_target {
39 /* Used by userspace */
40 char name[XT_EXTENSION_MAXNAMELEN];
46 /* Used inside the kernel */
47 struct xt_target *target;
54 unsigned char data[0];
57 #define XT_TARGET_INIT(__name, __size) \
60 .target_size = XT_ALIGN(__size), \
65 struct xt_standard_target {
66 struct xt_entry_target target;
70 struct xt_error_target {
71 struct xt_entry_target target;
72 char errorname[XT_FUNCTION_MAXNAMELEN];
75 /* The argument to IPT_SO_GET_REVISION_*. Returns highest revision
76 * kernel supports, if >= revision. */
77 struct xt_get_revision {
78 char name[XT_EXTENSION_MAXNAMELEN];
82 /* CONTINUE verdict for targets */
83 #define XT_CONTINUE 0xFFFFFFFF
85 /* For standard target */
86 #define XT_RETURN (-NF_REPEAT - 1)
88 /* this is a dummy structure to find out the alignment requirement for a struct
89 * containing all the fundamental data types that are used in ipt_entry,
90 * ip6t_entry and arpt_entry. This sucks, and it is a hack. It will be my
91 * personal pleasure to remove it -HW
100 #define XT_ALIGN(s) __ALIGN_KERNEL((s), __alignof__(struct _xt_align))
102 /* Standard return verdict, or do jump. */
103 #define XT_STANDARD_TARGET ""
105 #define XT_ERROR_TARGET "ERROR"
107 #define SET_COUNTER(c,b,p) do { (c).bcnt = (b); (c).pcnt = (p); } while(0)
108 #define ADD_COUNTER(c,b,p) do { (c).bcnt += (b); (c).pcnt += (p); } while(0)
111 __u64 pcnt, bcnt; /* Packet and byte counters */
114 /* The argument to IPT_SO_ADD_COUNTERS. */
115 struct xt_counters_info {
117 char name[XT_TABLE_MAXNAMELEN];
119 unsigned int num_counters;
121 /* The counters (actually `number' of these). */
122 struct xt_counters counters[0];
125 #define XT_INV_PROTO 0x40 /* Invert the sense of PROTO. */
127 /* fn returns 0 to continue iteration */
128 #define XT_MATCH_ITERATE(type, e, fn, args...) \
132 struct xt_entry_match *__m; \
134 for (__i = sizeof(type); \
135 __i < (e)->target_offset; \
136 __i += __m->u.match_size) { \
137 __m = (void *)e + __i; \
139 __ret = fn(__m , ## args); \
146 /* fn returns 0 to continue iteration */
147 #define XT_ENTRY_ITERATE_CONTINUE(type, entries, size, n, fn, args...) \
149 unsigned int __i, __n; \
153 for (__i = 0, __n = 0; __i < (size); \
154 __i += __entry->next_offset, __n++) { \
155 __entry = (void *)(entries) + __i; \
159 __ret = fn(__entry , ## args); \
166 /* fn returns 0 to continue iteration */
167 #define XT_ENTRY_ITERATE(type, entries, size, fn, args...) \
168 XT_ENTRY_ITERATE_CONTINUE(type, entries, size, 0, fn, args)
171 /* pos is normally a struct ipt_entry/ip6t_entry/etc. */
172 #define xt_entry_foreach(pos, ehead, esize) \
173 for ((pos) = (typeof(pos))(ehead); \
174 (pos) < (typeof(pos))((char *)(ehead) + (esize)); \
175 (pos) = (typeof(pos))((char *)(pos) + (pos)->next_offset))
177 /* can only be xt_entry_match, so no use of typeof here */
178 #define xt_ematch_foreach(pos, entry) \
179 for ((pos) = (struct xt_entry_match *)entry->elems; \
180 (pos) < (struct xt_entry_match *)((char *)(entry) + \
181 (entry)->target_offset); \
182 (pos) = (struct xt_entry_match *)((char *)(pos) + \
183 (pos)->u.match_size))
186 #endif /* _X_TABLES_H */