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/*
 *  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
/* ebtables target modules store the verdict inside an int. We can
 * reclaim a part of this int for backwards compatible extensions.
 * The 4 lsb are more than enough to store the verdict. */
#define EBT_VERDICT_BITS 0x0000000F
 
struct xt_match;
struct xt_target;
 
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_replace_kernel {
        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 a lot, 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 xt_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 xt_target *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 xt_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;
        __be16 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)
 
 
/* 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 /* __LINUX_BRIDGE_EFF_H */

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[/] [hf-risc/] [trunk/] [tools/] [riscv-gnu-toolchain-master/] [linux-headers/] [include/] [linux/] [netfilter_bridge/] [ebtables.h] - Blame information for rev 13

Line No.	Rev	Author	Line
1	13	serginhofr	`/*`
2			`* ebtables`
3			`*`
4			`* Authors:`
5			`* Bart De Schuymer <bdschuym@pandora.be>`
6			`*`
7			`* ebtables.c,v 2.0, April, 2002`
8			`*`
9			`* This code is stongly inspired on the iptables code which is`
10			* Copyright (C) 1999 Paul `Rusty' Russell & Michael J. Neuling
11			`*/`
12
13			`#ifndef __LINUX_BRIDGE_EFF_H`
14			`#define __LINUX_BRIDGE_EFF_H`
15			`#include <linux/if.h>`
16			`#include <linux/netfilter_bridge.h>`
17			`#include <linux/if_ether.h>`
18
19			`#define EBT_TABLE_MAXNAMELEN 32`
20			`#define EBT_CHAIN_MAXNAMELEN EBT_TABLE_MAXNAMELEN`
21			`#define EBT_FUNCTION_MAXNAMELEN EBT_TABLE_MAXNAMELEN`
22
23			`/* verdicts >0 are "branches" */`
24			`#define EBT_ACCEPT -1`
25			`#define EBT_DROP -2`
26			`#define EBT_CONTINUE -3`
27			`#define EBT_RETURN -4`
28			`#define NUM_STANDARD_TARGETS 4`
29			`/* ebtables target modules store the verdict inside an int. We can`
30			`* reclaim a part of this int for backwards compatible extensions.`
31			`* The 4 lsb are more than enough to store the verdict. */`
32			`#define EBT_VERDICT_BITS 0x0000000F`
33
34			`struct xt_match;`
35			`struct xt_target;`
36
37			`struct ebt_counter {`
38			`uint64_t pcnt;`
39			`uint64_t bcnt;`
40			`};`
41
42			`struct ebt_replace {`
43			`char name[EBT_TABLE_MAXNAMELEN];`
44			`unsigned int valid_hooks;`
45			`/* nr of rules in the table */`
46			`unsigned int nentries;`
47			`/* total size of the entries */`
48			`unsigned int entries_size;`
49			`/* start of the chains */`
50			`struct ebt_entries *hook_entry[NF_BR_NUMHOOKS];`
51			`/* nr of counters userspace expects back */`
52			`unsigned int num_counters;`
53			`/* where the kernel will put the old counters */`
54			`struct ebt_counter *counters;`
55			`char *entries;`
56			`};`
57
58			`struct ebt_replace_kernel {`
59			`char name[EBT_TABLE_MAXNAMELEN];`
60			`unsigned int valid_hooks;`
61			`/* nr of rules in the table */`
62			`unsigned int nentries;`
63			`/* total size of the entries */`
64			`unsigned int entries_size;`
65			`/* start of the chains */`
66			`struct ebt_entries *hook_entry[NF_BR_NUMHOOKS];`
67			`/* nr of counters userspace expects back */`
68			`unsigned int num_counters;`
69			`/* where the kernel will put the old counters */`
70			`struct ebt_counter *counters;`
71			`char *entries;`
72			`};`
73
74			`struct ebt_entries {`
75			`/* this field is always set to zero`
76			`* See EBT_ENTRY_OR_ENTRIES.`
77			`* Must be same size as ebt_entry.bitmask */`
78			`unsigned int distinguisher;`
79			`/* the chain name */`
80			`char name[EBT_CHAIN_MAXNAMELEN];`
81			`/* counter offset for this chain */`
82			`unsigned int counter_offset;`
83			`/* one standard (accept, drop, return) per hook */`
84			`int policy;`
85			`/* nr. of entries */`
86			`unsigned int nentries;`
87			`/* entry list */`
88			`char data[0] __attribute__ ((aligned (__alignof__(struct ebt_replace))));`
89			`};`
90
91			`/* used for the bitmask of struct ebt_entry */`
92
93			`/* This is a hack to make a difference between an ebt_entry struct and an`
94			`* ebt_entries struct when traversing the entries from start to end.`
95			`* Using this simplifies the code a lot, while still being able to use`
96			`* ebt_entries.`
97			`* Contrary, iptables doesn't use something like ebt_entries and therefore uses`
98			`* different techniques for naming the policy and such. So, iptables doesn't`
99			`* need a hack like this.`
100			`*/`
101			`#define EBT_ENTRY_OR_ENTRIES 0x01`
102			`/* these are the normal masks */`
103			`#define EBT_NOPROTO 0x02`
104			`#define EBT_802_3 0x04`
105			`#define EBT_SOURCEMAC 0x08`
106			`#define EBT_DESTMAC 0x10`
107			`#define EBT_F_MASK (EBT_NOPROTO \| EBT_802_3 \| EBT_SOURCEMAC \| EBT_DESTMAC \`
108			`\| EBT_ENTRY_OR_ENTRIES)`
109
110			`#define EBT_IPROTO 0x01`
111			`#define EBT_IIN 0x02`
112			`#define EBT_IOUT 0x04`
113			`#define EBT_ISOURCE 0x8`
114			`#define EBT_IDEST 0x10`
115			`#define EBT_ILOGICALIN 0x20`
116			`#define EBT_ILOGICALOUT 0x40`
117			`#define EBT_INV_MASK (EBT_IPROTO \| EBT_IIN \| EBT_IOUT \| EBT_ILOGICALIN \`
118			`\| EBT_ILOGICALOUT \| EBT_ISOURCE \| EBT_IDEST)`
119
120			`struct ebt_entry_match {`
121			`union {`
122			`char name[EBT_FUNCTION_MAXNAMELEN];`
123			`struct xt_match *match;`
124			`} u;`
125			`/* size of data */`
126			`unsigned int match_size;`
127			`unsigned char data[0] __attribute__ ((aligned (__alignof__(struct ebt_replace))));`
128			`};`
129
130			`struct ebt_entry_watcher {`
131			`union {`
132			`char name[EBT_FUNCTION_MAXNAMELEN];`
133			`struct xt_target *watcher;`
134			`} u;`
135			`/* size of data */`
136			`unsigned int watcher_size;`
137			`unsigned char data[0] __attribute__ ((aligned (__alignof__(struct ebt_replace))));`
138			`};`
139
140			`struct ebt_entry_target {`
141			`union {`
142			`char name[EBT_FUNCTION_MAXNAMELEN];`
143			`struct xt_target *target;`
144			`} u;`
145			`/* size of data */`
146			`unsigned int target_size;`
147			`unsigned char data[0] __attribute__ ((aligned (__alignof__(struct ebt_replace))));`
148			`};`
149
150			`#define EBT_STANDARD_TARGET "standard"`
151			`struct ebt_standard_target {`
152			`struct ebt_entry_target target;`
153			`int verdict;`
154			`};`
155
156			`/* one entry */`
157			`struct ebt_entry {`
158			`/* this needs to be the first field */`
159			`unsigned int bitmask;`
160			`unsigned int invflags;`
161			`__be16 ethproto;`
162			`/* the physical in-dev */`
163			`char in[IFNAMSIZ];`
164			`/* the logical in-dev */`
165			`char logical_in[IFNAMSIZ];`
166			`/* the physical out-dev */`
167			`char out[IFNAMSIZ];`
168			`/* the logical out-dev */`
169			`char logical_out[IFNAMSIZ];`
170			`unsigned char sourcemac[ETH_ALEN];`
171			`unsigned char sourcemsk[ETH_ALEN];`
172			`unsigned char destmac[ETH_ALEN];`
173			`unsigned char destmsk[ETH_ALEN];`
174			`/* sizeof ebt_entry + matches */`
175			`unsigned int watchers_offset;`
176			`/* sizeof ebt_entry + matches + watchers */`
177			`unsigned int target_offset;`
178			`/* sizeof ebt_entry + matches + watchers + target */`
179			`unsigned int next_offset;`
180			`unsigned char elems[0] __attribute__ ((aligned (__alignof__(struct ebt_replace))));`
181			`};`
182
183			`/* {g,s}etsockopt numbers */`
184			`#define EBT_BASE_CTL 128`
185
186			`#define EBT_SO_SET_ENTRIES (EBT_BASE_CTL)`
187			`#define EBT_SO_SET_COUNTERS (EBT_SO_SET_ENTRIES+1)`
188			`#define EBT_SO_SET_MAX (EBT_SO_SET_COUNTERS+1)`
189
190			`#define EBT_SO_GET_INFO (EBT_BASE_CTL)`
191			`#define EBT_SO_GET_ENTRIES (EBT_SO_GET_INFO+1)`
192			`#define EBT_SO_GET_INIT_INFO (EBT_SO_GET_ENTRIES+1)`
193			`#define EBT_SO_GET_INIT_ENTRIES (EBT_SO_GET_INIT_INFO+1)`
194			`#define EBT_SO_GET_MAX (EBT_SO_GET_INIT_ENTRIES+1)`
195
196
197			`/* blatently stolen from ip_tables.h`
198			`* fn returns 0 to continue iteration */`
199			`#define EBT_MATCH_ITERATE(e, fn, args...) \`
200			`({ \`
201			`unsigned int __i; \`
202			`int __ret = 0; \`
203			`struct ebt_entry_match *__match; \`
204			`\`
205			`for (__i = sizeof(struct ebt_entry); \`
206			`__i < (e)->watchers_offset; \`
207			`__i += __match->match_size + \`
208			`sizeof(struct ebt_entry_match)) { \`
209			`__match = (void *)(e) + __i; \`
210			`\`
211			`__ret = fn(__match , ## args); \`
212			`if (__ret != 0) \`
213			`break; \`
214			`} \`
215			`if (__ret == 0) { \`
216			`if (__i != (e)->watchers_offset) \`
217			`__ret = -EINVAL; \`
218			`} \`
219			`__ret; \`
220			`})`
221
222			`#define EBT_WATCHER_ITERATE(e, fn, args...) \`
223			`({ \`
224			`unsigned int __i; \`
225			`int __ret = 0; \`
226			`struct ebt_entry_watcher *__watcher; \`
227			`\`
228			`for (__i = e->watchers_offset; \`
229			`__i < (e)->target_offset; \`
230			`__i += __watcher->watcher_size + \`
231			`sizeof(struct ebt_entry_watcher)) { \`
232			`__watcher = (void *)(e) + __i; \`
233			`\`
234			`__ret = fn(__watcher , ## args); \`
235			`if (__ret != 0) \`
236			`break; \`
237			`} \`
238			`if (__ret == 0) { \`
239			`if (__i != (e)->target_offset) \`
240			`__ret = -EINVAL; \`
241			`} \`
242			`__ret; \`
243			`})`
244
245			`#define EBT_ENTRY_ITERATE(entries, size, fn, args...) \`
246			`({ \`
247			`unsigned int __i; \`
248			`int __ret = 0; \`
249			`struct ebt_entry *__entry; \`
250			`\`
251			`for (__i = 0; __i < (size);) { \`
252			`__entry = (void *)(entries) + __i; \`
253			`__ret = fn(__entry , ## args); \`
254			`if (__ret != 0) \`
255			`break; \`
256			`if (__entry->bitmask != 0) \`
257			`__i += __entry->next_offset; \`
258			`else \`
259			`__i += sizeof(struct ebt_entries); \`
260			`} \`
261			`if (__ret == 0) { \`
262			`if (__i != (size)) \`
263			`__ret = -EINVAL; \`
264			`} \`
265			`__ret; \`
266			`})`
267
268			`#endif /* __LINUX_BRIDGE_EFF_H */`