2 * 25-Jul-1998 Major changes to allow for ip chain table
4 * 3-Jan-2000 Named tables to allow packet selection for different uses.
8 * Format of an IP6 firewall descriptor
10 * src, dst, src_mask, dst_mask are always stored in network byte order.
11 * flags are stored in host byte order (of course).
12 * Port numbers are stored in HOST byte order.
15 #ifndef _UAPI_IP6_TABLES_H
16 #define _UAPI_IP6_TABLES_H
18 #include <linux/types.h>
19 #include <linux/compiler.h>
21 #include <linux/netfilter_ipv6.h>
23 #include <linux/netfilter/x_tables.h>
26 #define IP6T_FUNCTION_MAXNAMELEN XT_FUNCTION_MAXNAMELEN
27 #define IP6T_TABLE_MAXNAMELEN XT_TABLE_MAXNAMELEN
28 #define ip6t_match xt_match
29 #define ip6t_target xt_target
30 #define ip6t_table xt_table
31 #define ip6t_get_revision xt_get_revision
32 #define ip6t_entry_match xt_entry_match
33 #define ip6t_entry_target xt_entry_target
34 #define ip6t_standard_target xt_standard_target
35 #define ip6t_error_target xt_error_target
36 #define ip6t_counters xt_counters
37 #define IP6T_CONTINUE XT_CONTINUE
38 #define IP6T_RETURN XT_RETURN
40 /* Pre-iptables-1.4.0 */
41 #include <linux/netfilter/xt_tcpudp.h>
42 #define ip6t_tcp xt_tcp
43 #define ip6t_udp xt_udp
44 #define IP6T_TCP_INV_SRCPT XT_TCP_INV_SRCPT
45 #define IP6T_TCP_INV_DSTPT XT_TCP_INV_DSTPT
46 #define IP6T_TCP_INV_FLAGS XT_TCP_INV_FLAGS
47 #define IP6T_TCP_INV_OPTION XT_TCP_INV_OPTION
48 #define IP6T_TCP_INV_MASK XT_TCP_INV_MASK
49 #define IP6T_UDP_INV_SRCPT XT_UDP_INV_SRCPT
50 #define IP6T_UDP_INV_DSTPT XT_UDP_INV_DSTPT
51 #define IP6T_UDP_INV_MASK XT_UDP_INV_MASK
53 #define ip6t_counters_info xt_counters_info
54 #define IP6T_STANDARD_TARGET XT_STANDARD_TARGET
55 #define IP6T_ERROR_TARGET XT_ERROR_TARGET
56 #define IP6T_MATCH_ITERATE(e, fn, args...) \
57 XT_MATCH_ITERATE(struct ip6t_entry, e, fn, ## args)
58 #define IP6T_ENTRY_ITERATE(entries, size, fn, args...) \
59 XT_ENTRY_ITERATE(struct ip6t_entry, entries, size, fn, ## args)
62 /* Yes, Virginia, you have to zero the padding. */
64 /* Source and destination IP6 addr */
65 struct in6_addr src, dst;
66 /* Mask for src and dest IP6 addr */
67 struct in6_addr smsk, dmsk;
68 char iniface[IFNAMSIZ], outiface[IFNAMSIZ];
69 unsigned char iniface_mask[IFNAMSIZ], outiface_mask[IFNAMSIZ];
71 /* Upper protocol number
72 * - The allowed value is 0 (any) or protocol number of last parsable
73 * header, which is 50 (ESP), 59 (No Next Header), 135 (MH), or
74 * the non IPv6 extension headers.
75 * - The protocol numbers of IPv6 extension headers except of ESP and
76 * MH do not match any packets.
77 * - You also need to set IP6T_FLAGS_PROTO to "flags" to check protocol.
80 /* TOS to match iff flags & IP6T_F_TOS */
89 /* Values for "flag" field in struct ip6t_ip6 (general ip6 structure). */
90 #define IP6T_F_PROTO 0x01 /* Set if rule cares about upper
92 #define IP6T_F_TOS 0x02 /* Match the TOS. */
93 #define IP6T_F_GOTO 0x04 /* Set if jump is a goto */
94 #define IP6T_F_MASK 0x07 /* All possible flag bits mask. */
96 /* Values for "inv" field in struct ip6t_ip6. */
97 #define IP6T_INV_VIA_IN 0x01 /* Invert the sense of IN IFACE. */
98 #define IP6T_INV_VIA_OUT 0x02 /* Invert the sense of OUT IFACE */
99 #define IP6T_INV_TOS 0x04 /* Invert the sense of TOS. */
100 #define IP6T_INV_SRCIP 0x08 /* Invert the sense of SRC IP. */
101 #define IP6T_INV_DSTIP 0x10 /* Invert the sense of DST OP. */
102 #define IP6T_INV_FRAG 0x20 /* Invert the sense of FRAG. */
103 #define IP6T_INV_PROTO XT_INV_PROTO
104 #define IP6T_INV_MASK 0x7F /* All possible flag bits mask. */
106 /* This structure defines each of the firewall rules. Consists of 3
107 parts which are 1) general IP header stuff 2) match specific
108 stuff 3) the target to perform if the rule matches */
110 struct ip6t_ip6 ipv6;
112 /* Mark with fields that we care about. */
113 unsigned int nfcache;
115 /* Size of ipt_entry + matches */
117 /* Size of ipt_entry + matches + target */
121 unsigned int comefrom;
123 /* Packet and byte counters. */
124 struct xt_counters counters;
126 /* The matches (if any), then the target. */
127 unsigned char elems[0];
131 struct ip6t_standard {
132 struct ip6t_entry entry;
133 struct xt_standard_target target;
137 struct ip6t_entry entry;
138 struct xt_error_target target;
141 #define IP6T_ENTRY_INIT(__size) \
143 .target_offset = sizeof(struct ip6t_entry), \
144 .next_offset = (__size), \
147 #define IP6T_STANDARD_INIT(__verdict) \
149 .entry = IP6T_ENTRY_INIT(sizeof(struct ip6t_standard)), \
150 .target = XT_TARGET_INIT(XT_STANDARD_TARGET, \
151 sizeof(struct xt_standard_target)), \
152 .target.verdict = -(__verdict) - 1, \
155 #define IP6T_ERROR_INIT \
157 .entry = IP6T_ENTRY_INIT(sizeof(struct ip6t_error)), \
158 .target = XT_TARGET_INIT(XT_ERROR_TARGET, \
159 sizeof(struct xt_error_target)), \
160 .target.errorname = "ERROR", \
164 * New IP firewall options for [gs]etsockopt at the RAW IP level.
165 * Unlike BSD Linux inherits IP options so you don't have to use
166 * a raw socket for this. Instead we check rights in the calls.
168 * ATTENTION: check linux/in6.h before adding new number here.
170 #define IP6T_BASE_CTL 64
172 #define IP6T_SO_SET_REPLACE (IP6T_BASE_CTL)
173 #define IP6T_SO_SET_ADD_COUNTERS (IP6T_BASE_CTL + 1)
174 #define IP6T_SO_SET_MAX IP6T_SO_SET_ADD_COUNTERS
176 #define IP6T_SO_GET_INFO (IP6T_BASE_CTL)
177 #define IP6T_SO_GET_ENTRIES (IP6T_BASE_CTL + 1)
178 #define IP6T_SO_GET_REVISION_MATCH (IP6T_BASE_CTL + 4)
179 #define IP6T_SO_GET_REVISION_TARGET (IP6T_BASE_CTL + 5)
180 #define IP6T_SO_GET_MAX IP6T_SO_GET_REVISION_TARGET
182 /* obtain original address if REDIRECT'd connection */
183 #define IP6T_SO_ORIGINAL_DST 80
185 /* ICMP matching stuff */
187 __u8 type; /* type to match */
188 __u8 code[2]; /* range of code */
189 __u8 invflags; /* Inverse flags */
192 /* Values for "inv" field for struct ipt_icmp. */
193 #define IP6T_ICMP_INV 0x01 /* Invert the sense of type/code test */
195 /* The argument to IP6T_SO_GET_INFO */
196 struct ip6t_getinfo {
197 /* Which table: caller fills this in. */
198 char name[XT_TABLE_MAXNAMELEN];
200 /* Kernel fills these in. */
201 /* Which hook entry points are valid: bitmask */
202 unsigned int valid_hooks;
204 /* Hook entry points: one per netfilter hook. */
205 unsigned int hook_entry[NF_INET_NUMHOOKS];
207 /* Underflow points. */
208 unsigned int underflow[NF_INET_NUMHOOKS];
210 /* Number of entries */
211 unsigned int num_entries;
213 /* Size of entries. */
217 /* The argument to IP6T_SO_SET_REPLACE. */
218 struct ip6t_replace {
220 char name[XT_TABLE_MAXNAMELEN];
222 /* Which hook entry points are valid: bitmask. You can't
224 unsigned int valid_hooks;
226 /* Number of entries */
227 unsigned int num_entries;
229 /* Total size of new entries */
232 /* Hook entry points. */
233 unsigned int hook_entry[NF_INET_NUMHOOKS];
235 /* Underflow points. */
236 unsigned int underflow[NF_INET_NUMHOOKS];
238 /* Information about old entries: */
239 /* Number of counters (must be equal to current number of entries). */
240 unsigned int num_counters;
241 /* The old entries' counters. */
242 struct xt_counters __user *counters;
244 /* The entries (hang off end: not really an array). */
245 struct ip6t_entry entries[0];
248 /* The argument to IP6T_SO_GET_ENTRIES. */
249 struct ip6t_get_entries {
250 /* Which table: user fills this in. */
251 char name[XT_TABLE_MAXNAMELEN];
253 /* User fills this in: total entry size. */
257 struct ip6t_entry entrytable[0];
260 /* Helper functions */
261 static __inline__ struct xt_entry_target *
262 ip6t_get_target(struct ip6t_entry *e)
264 return (void *)e + e->target_offset;
268 * Main firewall chains definitions and global var's definitions.
271 #endif /* _UAPI_IP6_TABLES_H */