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6f52b16c | 1 | /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
ff1e1756 DH |
2 | /* |
3 | * 25-Jul-1998 Major changes to allow for ip chain table | |
4 | * | |
5 | * 3-Jan-2000 Named tables to allow packet selection for different uses. | |
6 | */ | |
7 | ||
8 | /* | |
9 | * Format of an IP6 firewall descriptor | |
10 | * | |
11 | * src, dst, src_mask, dst_mask are always stored in network byte order. | |
12 | * flags are stored in host byte order (of course). | |
13 | * Port numbers are stored in HOST byte order. | |
14 | */ | |
15 | ||
16 | #ifndef _UAPI_IP6_TABLES_H | |
17 | #define _UAPI_IP6_TABLES_H | |
18 | ||
19 | #include <linux/types.h> | |
20 | #include <linux/compiler.h> | |
1ffad83d | 21 | #include <linux/if.h> |
ff1e1756 DH |
22 | #include <linux/netfilter_ipv6.h> |
23 | ||
24 | #include <linux/netfilter/x_tables.h> | |
25 | ||
26 | #ifndef __KERNEL__ | |
27 | #define IP6T_FUNCTION_MAXNAMELEN XT_FUNCTION_MAXNAMELEN | |
28 | #define IP6T_TABLE_MAXNAMELEN XT_TABLE_MAXNAMELEN | |
29 | #define ip6t_match xt_match | |
30 | #define ip6t_target xt_target | |
31 | #define ip6t_table xt_table | |
32 | #define ip6t_get_revision xt_get_revision | |
33 | #define ip6t_entry_match xt_entry_match | |
34 | #define ip6t_entry_target xt_entry_target | |
35 | #define ip6t_standard_target xt_standard_target | |
36 | #define ip6t_error_target xt_error_target | |
37 | #define ip6t_counters xt_counters | |
38 | #define IP6T_CONTINUE XT_CONTINUE | |
39 | #define IP6T_RETURN XT_RETURN | |
40 | ||
41 | /* Pre-iptables-1.4.0 */ | |
42 | #include <linux/netfilter/xt_tcpudp.h> | |
43 | #define ip6t_tcp xt_tcp | |
44 | #define ip6t_udp xt_udp | |
45 | #define IP6T_TCP_INV_SRCPT XT_TCP_INV_SRCPT | |
46 | #define IP6T_TCP_INV_DSTPT XT_TCP_INV_DSTPT | |
47 | #define IP6T_TCP_INV_FLAGS XT_TCP_INV_FLAGS | |
48 | #define IP6T_TCP_INV_OPTION XT_TCP_INV_OPTION | |
49 | #define IP6T_TCP_INV_MASK XT_TCP_INV_MASK | |
50 | #define IP6T_UDP_INV_SRCPT XT_UDP_INV_SRCPT | |
51 | #define IP6T_UDP_INV_DSTPT XT_UDP_INV_DSTPT | |
52 | #define IP6T_UDP_INV_MASK XT_UDP_INV_MASK | |
53 | ||
54 | #define ip6t_counters_info xt_counters_info | |
55 | #define IP6T_STANDARD_TARGET XT_STANDARD_TARGET | |
56 | #define IP6T_ERROR_TARGET XT_ERROR_TARGET | |
57 | #define IP6T_MATCH_ITERATE(e, fn, args...) \ | |
58 | XT_MATCH_ITERATE(struct ip6t_entry, e, fn, ## args) | |
59 | #define IP6T_ENTRY_ITERATE(entries, size, fn, args...) \ | |
60 | XT_ENTRY_ITERATE(struct ip6t_entry, entries, size, fn, ## args) | |
61 | #endif | |
62 | ||
63 | /* Yes, Virginia, you have to zero the padding. */ | |
64 | struct ip6t_ip6 { | |
65 | /* Source and destination IP6 addr */ | |
66 | struct in6_addr src, dst; | |
67 | /* Mask for src and dest IP6 addr */ | |
68 | struct in6_addr smsk, dmsk; | |
69 | char iniface[IFNAMSIZ], outiface[IFNAMSIZ]; | |
70 | unsigned char iniface_mask[IFNAMSIZ], outiface_mask[IFNAMSIZ]; | |
71 | ||
72 | /* Upper protocol number | |
73 | * - The allowed value is 0 (any) or protocol number of last parsable | |
74 | * header, which is 50 (ESP), 59 (No Next Header), 135 (MH), or | |
75 | * the non IPv6 extension headers. | |
76 | * - The protocol numbers of IPv6 extension headers except of ESP and | |
77 | * MH do not match any packets. | |
78 | * - You also need to set IP6T_FLAGS_PROTO to "flags" to check protocol. | |
79 | */ | |
80 | __u16 proto; | |
81 | /* TOS to match iff flags & IP6T_F_TOS */ | |
82 | __u8 tos; | |
83 | ||
84 | /* Flags word */ | |
85 | __u8 flags; | |
86 | /* Inverse flags */ | |
87 | __u8 invflags; | |
88 | }; | |
89 | ||
90 | /* Values for "flag" field in struct ip6t_ip6 (general ip6 structure). */ | |
91 | #define IP6T_F_PROTO 0x01 /* Set if rule cares about upper | |
92 | protocols */ | |
93 | #define IP6T_F_TOS 0x02 /* Match the TOS. */ | |
94 | #define IP6T_F_GOTO 0x04 /* Set if jump is a goto */ | |
95 | #define IP6T_F_MASK 0x07 /* All possible flag bits mask. */ | |
96 | ||
97 | /* Values for "inv" field in struct ip6t_ip6. */ | |
98 | #define IP6T_INV_VIA_IN 0x01 /* Invert the sense of IN IFACE. */ | |
99 | #define IP6T_INV_VIA_OUT 0x02 /* Invert the sense of OUT IFACE */ | |
100 | #define IP6T_INV_TOS 0x04 /* Invert the sense of TOS. */ | |
101 | #define IP6T_INV_SRCIP 0x08 /* Invert the sense of SRC IP. */ | |
102 | #define IP6T_INV_DSTIP 0x10 /* Invert the sense of DST OP. */ | |
103 | #define IP6T_INV_FRAG 0x20 /* Invert the sense of FRAG. */ | |
104 | #define IP6T_INV_PROTO XT_INV_PROTO | |
105 | #define IP6T_INV_MASK 0x7F /* All possible flag bits mask. */ | |
106 | ||
107 | /* This structure defines each of the firewall rules. Consists of 3 | |
108 | parts which are 1) general IP header stuff 2) match specific | |
109 | stuff 3) the target to perform if the rule matches */ | |
110 | struct ip6t_entry { | |
111 | struct ip6t_ip6 ipv6; | |
112 | ||
113 | /* Mark with fields that we care about. */ | |
114 | unsigned int nfcache; | |
115 | ||
116 | /* Size of ipt_entry + matches */ | |
117 | __u16 target_offset; | |
118 | /* Size of ipt_entry + matches + target */ | |
119 | __u16 next_offset; | |
120 | ||
121 | /* Back pointer */ | |
122 | unsigned int comefrom; | |
123 | ||
124 | /* Packet and byte counters. */ | |
125 | struct xt_counters counters; | |
126 | ||
127 | /* The matches (if any), then the target. */ | |
128 | unsigned char elems[0]; | |
129 | }; | |
130 | ||
131 | /* Standard entry */ | |
132 | struct ip6t_standard { | |
133 | struct ip6t_entry entry; | |
134 | struct xt_standard_target target; | |
135 | }; | |
136 | ||
137 | struct ip6t_error { | |
138 | struct ip6t_entry entry; | |
139 | struct xt_error_target target; | |
140 | }; | |
141 | ||
142 | #define IP6T_ENTRY_INIT(__size) \ | |
143 | { \ | |
144 | .target_offset = sizeof(struct ip6t_entry), \ | |
145 | .next_offset = (__size), \ | |
146 | } | |
147 | ||
148 | #define IP6T_STANDARD_INIT(__verdict) \ | |
149 | { \ | |
150 | .entry = IP6T_ENTRY_INIT(sizeof(struct ip6t_standard)), \ | |
151 | .target = XT_TARGET_INIT(XT_STANDARD_TARGET, \ | |
152 | sizeof(struct xt_standard_target)), \ | |
153 | .target.verdict = -(__verdict) - 1, \ | |
154 | } | |
155 | ||
156 | #define IP6T_ERROR_INIT \ | |
157 | { \ | |
158 | .entry = IP6T_ENTRY_INIT(sizeof(struct ip6t_error)), \ | |
159 | .target = XT_TARGET_INIT(XT_ERROR_TARGET, \ | |
160 | sizeof(struct xt_error_target)), \ | |
161 | .target.errorname = "ERROR", \ | |
162 | } | |
163 | ||
164 | /* | |
165 | * New IP firewall options for [gs]etsockopt at the RAW IP level. | |
166 | * Unlike BSD Linux inherits IP options so you don't have to use | |
167 | * a raw socket for this. Instead we check rights in the calls. | |
168 | * | |
169 | * ATTENTION: check linux/in6.h before adding new number here. | |
170 | */ | |
171 | #define IP6T_BASE_CTL 64 | |
172 | ||
173 | #define IP6T_SO_SET_REPLACE (IP6T_BASE_CTL) | |
174 | #define IP6T_SO_SET_ADD_COUNTERS (IP6T_BASE_CTL + 1) | |
175 | #define IP6T_SO_SET_MAX IP6T_SO_SET_ADD_COUNTERS | |
176 | ||
177 | #define IP6T_SO_GET_INFO (IP6T_BASE_CTL) | |
178 | #define IP6T_SO_GET_ENTRIES (IP6T_BASE_CTL + 1) | |
179 | #define IP6T_SO_GET_REVISION_MATCH (IP6T_BASE_CTL + 4) | |
180 | #define IP6T_SO_GET_REVISION_TARGET (IP6T_BASE_CTL + 5) | |
181 | #define IP6T_SO_GET_MAX IP6T_SO_GET_REVISION_TARGET | |
182 | ||
121d1e09 FW |
183 | /* obtain original address if REDIRECT'd connection */ |
184 | #define IP6T_SO_ORIGINAL_DST 80 | |
185 | ||
ff1e1756 DH |
186 | /* ICMP matching stuff */ |
187 | struct ip6t_icmp { | |
188 | __u8 type; /* type to match */ | |
189 | __u8 code[2]; /* range of code */ | |
190 | __u8 invflags; /* Inverse flags */ | |
191 | }; | |
192 | ||
193 | /* Values for "inv" field for struct ipt_icmp. */ | |
194 | #define IP6T_ICMP_INV 0x01 /* Invert the sense of type/code test */ | |
195 | ||
196 | /* The argument to IP6T_SO_GET_INFO */ | |
197 | struct ip6t_getinfo { | |
198 | /* Which table: caller fills this in. */ | |
199 | char name[XT_TABLE_MAXNAMELEN]; | |
200 | ||
201 | /* Kernel fills these in. */ | |
202 | /* Which hook entry points are valid: bitmask */ | |
203 | unsigned int valid_hooks; | |
204 | ||
205 | /* Hook entry points: one per netfilter hook. */ | |
206 | unsigned int hook_entry[NF_INET_NUMHOOKS]; | |
207 | ||
208 | /* Underflow points. */ | |
209 | unsigned int underflow[NF_INET_NUMHOOKS]; | |
210 | ||
211 | /* Number of entries */ | |
212 | unsigned int num_entries; | |
213 | ||
214 | /* Size of entries. */ | |
215 | unsigned int size; | |
216 | }; | |
217 | ||
218 | /* The argument to IP6T_SO_SET_REPLACE. */ | |
219 | struct ip6t_replace { | |
220 | /* Which table. */ | |
221 | char name[XT_TABLE_MAXNAMELEN]; | |
222 | ||
223 | /* Which hook entry points are valid: bitmask. You can't | |
224 | change this. */ | |
225 | unsigned int valid_hooks; | |
226 | ||
227 | /* Number of entries */ | |
228 | unsigned int num_entries; | |
229 | ||
230 | /* Total size of new entries */ | |
231 | unsigned int size; | |
232 | ||
233 | /* Hook entry points. */ | |
234 | unsigned int hook_entry[NF_INET_NUMHOOKS]; | |
235 | ||
236 | /* Underflow points. */ | |
237 | unsigned int underflow[NF_INET_NUMHOOKS]; | |
238 | ||
239 | /* Information about old entries: */ | |
240 | /* Number of counters (must be equal to current number of entries). */ | |
241 | unsigned int num_counters; | |
242 | /* The old entries' counters. */ | |
243 | struct xt_counters __user *counters; | |
244 | ||
245 | /* The entries (hang off end: not really an array). */ | |
94dfc73e | 246 | struct ip6t_entry entries[]; |
ff1e1756 DH |
247 | }; |
248 | ||
249 | /* The argument to IP6T_SO_GET_ENTRIES. */ | |
250 | struct ip6t_get_entries { | |
251 | /* Which table: user fills this in. */ | |
252 | char name[XT_TABLE_MAXNAMELEN]; | |
253 | ||
254 | /* User fills this in: total entry size. */ | |
255 | unsigned int size; | |
256 | ||
257 | /* The entries. */ | |
94dfc73e | 258 | struct ip6t_entry entrytable[]; |
ff1e1756 DH |
259 | }; |
260 | ||
261 | /* Helper functions */ | |
262 | static __inline__ struct xt_entry_target * | |
263 | ip6t_get_target(struct ip6t_entry *e) | |
264 | { | |
d6547f2a | 265 | return (struct xt_entry_target *)((char *)e + e->target_offset); |
ff1e1756 DH |
266 | } |
267 | ||
268 | /* | |
269 | * Main firewall chains definitions and global var's definitions. | |
270 | */ | |
271 | ||
272 | #endif /* _UAPI_IP6_TABLES_H */ |