Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Packet matching code. | |
3 | * | |
4 | * Copyright (C) 1999 Paul `Rusty' Russell & Michael J. Neuling | |
6b7d31fc | 5 | * Copyright (C) 2000-2005 Netfilter Core Team <coreteam@netfilter.org> |
1da177e4 LT |
6 | * |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
1da177e4 | 10 | */ |
90e7d4ab | 11 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
4fc268d2 | 12 | #include <linux/capability.h> |
14c85021 | 13 | #include <linux/in.h> |
1da177e4 LT |
14 | #include <linux/skbuff.h> |
15 | #include <linux/kmod.h> | |
16 | #include <linux/vmalloc.h> | |
17 | #include <linux/netdevice.h> | |
18 | #include <linux/module.h> | |
4bdbf6c0 | 19 | #include <linux/poison.h> |
1da177e4 | 20 | #include <linux/icmpv6.h> |
1da177e4 | 21 | #include <net/ipv6.h> |
3bc3fe5e | 22 | #include <net/compat.h> |
1da177e4 | 23 | #include <asm/uaccess.h> |
57b47a53 | 24 | #include <linux/mutex.h> |
1da177e4 | 25 | #include <linux/proc_fs.h> |
3bc3fe5e | 26 | #include <linux/err.h> |
c8923c6b | 27 | #include <linux/cpumask.h> |
1da177e4 LT |
28 | |
29 | #include <linux/netfilter_ipv6/ip6_tables.h> | |
2e4e6a17 | 30 | #include <linux/netfilter/x_tables.h> |
f01ffbd6 | 31 | #include <net/netfilter/nf_log.h> |
e3eaa991 | 32 | #include "../../netfilter/xt_repldata.h" |
1da177e4 LT |
33 | |
34 | MODULE_LICENSE("GPL"); | |
35 | MODULE_AUTHOR("Netfilter Core Team <coreteam@netfilter.org>"); | |
36 | MODULE_DESCRIPTION("IPv6 packet filter"); | |
37 | ||
1da177e4 LT |
38 | /*#define DEBUG_IP_FIREWALL*/ |
39 | /*#define DEBUG_ALLOW_ALL*/ /* Useful for remote debugging */ | |
40 | /*#define DEBUG_IP_FIREWALL_USER*/ | |
41 | ||
42 | #ifdef DEBUG_IP_FIREWALL | |
ff67e4e4 | 43 | #define dprintf(format, args...) pr_info(format , ## args) |
1da177e4 LT |
44 | #else |
45 | #define dprintf(format, args...) | |
46 | #endif | |
47 | ||
48 | #ifdef DEBUG_IP_FIREWALL_USER | |
ff67e4e4 | 49 | #define duprintf(format, args...) pr_info(format , ## args) |
1da177e4 LT |
50 | #else |
51 | #define duprintf(format, args...) | |
52 | #endif | |
53 | ||
54 | #ifdef CONFIG_NETFILTER_DEBUG | |
af567603 | 55 | #define IP_NF_ASSERT(x) WARN_ON(!(x)) |
1da177e4 LT |
56 | #else |
57 | #define IP_NF_ASSERT(x) | |
58 | #endif | |
1da177e4 | 59 | |
1da177e4 LT |
60 | #if 0 |
61 | /* All the better to debug you with... */ | |
62 | #define static | |
63 | #define inline | |
64 | #endif | |
65 | ||
e3eaa991 JE |
66 | void *ip6t_alloc_initial_table(const struct xt_table *info) |
67 | { | |
68 | return xt_alloc_initial_table(ip6t, IP6T); | |
69 | } | |
70 | EXPORT_SYMBOL_GPL(ip6t_alloc_initial_table); | |
71 | ||
6b7d31fc | 72 | /* |
1da177e4 | 73 | We keep a set of rules for each CPU, so we can avoid write-locking |
6b7d31fc HW |
74 | them in the softirq when updating the counters and therefore |
75 | only need to read-lock in the softirq; doing a write_lock_bh() in user | |
76 | context stops packets coming through and allows user context to read | |
77 | the counters or update the rules. | |
1da177e4 | 78 | |
1da177e4 LT |
79 | Hence the start of any table is given by get_table() below. */ |
80 | ||
1da177e4 | 81 | /* Returns whether matches rule or not. */ |
022748a9 | 82 | /* Performance critical - called for every packet */ |
1d93a9cb | 83 | static inline bool |
1da177e4 LT |
84 | ip6_packet_match(const struct sk_buff *skb, |
85 | const char *indev, | |
86 | const char *outdev, | |
87 | const struct ip6t_ip6 *ip6info, | |
88 | unsigned int *protoff, | |
cff533ac | 89 | int *fragoff, bool *hotdrop) |
1da177e4 | 90 | { |
1da177e4 | 91 | unsigned long ret; |
0660e03f | 92 | const struct ipv6hdr *ipv6 = ipv6_hdr(skb); |
1da177e4 | 93 | |
e79ec50b | 94 | #define FWINV(bool, invflg) ((bool) ^ !!(ip6info->invflags & (invflg))) |
1da177e4 | 95 | |
f2ffd9ee | 96 | if (FWINV(ipv6_masked_addr_cmp(&ipv6->saddr, &ip6info->smsk, |
3666ed1c JP |
97 | &ip6info->src), IP6T_INV_SRCIP) || |
98 | FWINV(ipv6_masked_addr_cmp(&ipv6->daddr, &ip6info->dmsk, | |
99 | &ip6info->dst), IP6T_INV_DSTIP)) { | |
1da177e4 LT |
100 | dprintf("Source or dest mismatch.\n"); |
101 | /* | |
102 | dprintf("SRC: %u. Mask: %u. Target: %u.%s\n", ip->saddr, | |
103 | ipinfo->smsk.s_addr, ipinfo->src.s_addr, | |
104 | ipinfo->invflags & IP6T_INV_SRCIP ? " (INV)" : ""); | |
105 | dprintf("DST: %u. Mask: %u. Target: %u.%s\n", ip->daddr, | |
106 | ipinfo->dmsk.s_addr, ipinfo->dst.s_addr, | |
107 | ipinfo->invflags & IP6T_INV_DSTIP ? " (INV)" : "");*/ | |
1d93a9cb | 108 | return false; |
1da177e4 LT |
109 | } |
110 | ||
b8dfe498 | 111 | ret = ifname_compare_aligned(indev, ip6info->iniface, ip6info->iniface_mask); |
1da177e4 LT |
112 | |
113 | if (FWINV(ret != 0, IP6T_INV_VIA_IN)) { | |
114 | dprintf("VIA in mismatch (%s vs %s).%s\n", | |
115 | indev, ip6info->iniface, | |
116 | ip6info->invflags&IP6T_INV_VIA_IN ?" (INV)":""); | |
1d93a9cb | 117 | return false; |
1da177e4 LT |
118 | } |
119 | ||
b8dfe498 | 120 | ret = ifname_compare_aligned(outdev, ip6info->outiface, ip6info->outiface_mask); |
1da177e4 LT |
121 | |
122 | if (FWINV(ret != 0, IP6T_INV_VIA_OUT)) { | |
123 | dprintf("VIA out mismatch (%s vs %s).%s\n", | |
124 | outdev, ip6info->outiface, | |
125 | ip6info->invflags&IP6T_INV_VIA_OUT ?" (INV)":""); | |
1d93a9cb | 126 | return false; |
1da177e4 LT |
127 | } |
128 | ||
129 | /* ... might want to do something with class and flowlabel here ... */ | |
130 | ||
131 | /* look for the desired protocol header */ | |
132 | if((ip6info->flags & IP6T_F_PROTO)) { | |
b777e0ce PM |
133 | int protohdr; |
134 | unsigned short _frag_off; | |
1da177e4 | 135 | |
84018f55 | 136 | protohdr = ipv6_find_hdr(skb, protoff, -1, &_frag_off, NULL); |
51d8b1a6 PM |
137 | if (protohdr < 0) { |
138 | if (_frag_off == 0) | |
cff533ac | 139 | *hotdrop = true; |
1d93a9cb | 140 | return false; |
51d8b1a6 | 141 | } |
b777e0ce | 142 | *fragoff = _frag_off; |
1da177e4 LT |
143 | |
144 | dprintf("Packet protocol %hi ?= %s%hi.\n", | |
1ab1457c | 145 | protohdr, |
1da177e4 LT |
146 | ip6info->invflags & IP6T_INV_PROTO ? "!":"", |
147 | ip6info->proto); | |
148 | ||
b777e0ce | 149 | if (ip6info->proto == protohdr) { |
1da177e4 | 150 | if(ip6info->invflags & IP6T_INV_PROTO) { |
1d93a9cb | 151 | return false; |
1da177e4 | 152 | } |
1d93a9cb | 153 | return true; |
1da177e4 LT |
154 | } |
155 | ||
156 | /* We need match for the '-p all', too! */ | |
157 | if ((ip6info->proto != 0) && | |
158 | !(ip6info->invflags & IP6T_INV_PROTO)) | |
1d93a9cb | 159 | return false; |
1da177e4 | 160 | } |
1d93a9cb | 161 | return true; |
1da177e4 LT |
162 | } |
163 | ||
164 | /* should be ip6 safe */ | |
022748a9 | 165 | static bool |
1da177e4 LT |
166 | ip6_checkentry(const struct ip6t_ip6 *ipv6) |
167 | { | |
168 | if (ipv6->flags & ~IP6T_F_MASK) { | |
169 | duprintf("Unknown flag bits set: %08X\n", | |
170 | ipv6->flags & ~IP6T_F_MASK); | |
ccb79bdc | 171 | return false; |
1da177e4 LT |
172 | } |
173 | if (ipv6->invflags & ~IP6T_INV_MASK) { | |
174 | duprintf("Unknown invflag bits set: %08X\n", | |
175 | ipv6->invflags & ~IP6T_INV_MASK); | |
ccb79bdc | 176 | return false; |
1da177e4 | 177 | } |
ccb79bdc | 178 | return true; |
1da177e4 LT |
179 | } |
180 | ||
181 | static unsigned int | |
4b560b44 | 182 | ip6t_error(struct sk_buff *skb, const struct xt_action_param *par) |
1da177e4 LT |
183 | { |
184 | if (net_ratelimit()) | |
ff67e4e4 | 185 | pr_info("error: `%s'\n", (const char *)par->targinfo); |
1da177e4 LT |
186 | |
187 | return NF_DROP; | |
188 | } | |
189 | ||
1da177e4 | 190 | static inline struct ip6t_entry * |
d5d1baa1 | 191 | get_entry(const void *base, unsigned int offset) |
1da177e4 LT |
192 | { |
193 | return (struct ip6t_entry *)(base + offset); | |
194 | } | |
195 | ||
ba9dda3a | 196 | /* All zeroes == unconditional rule. */ |
022748a9 | 197 | /* Mildly perf critical (only if packet tracing is on) */ |
47901dc2 | 198 | static inline bool unconditional(const struct ip6t_ip6 *ipv6) |
ba9dda3a | 199 | { |
47901dc2 | 200 | static const struct ip6t_ip6 uncond; |
ba9dda3a | 201 | |
47901dc2 | 202 | return memcmp(ipv6, &uncond, sizeof(uncond)) == 0; |
ba9dda3a JK |
203 | } |
204 | ||
87a2e70d | 205 | static inline const struct xt_entry_target * |
d5d1baa1 JE |
206 | ip6t_get_target_c(const struct ip6t_entry *e) |
207 | { | |
208 | return ip6t_get_target((struct ip6t_entry *)e); | |
209 | } | |
210 | ||
ba9dda3a JK |
211 | #if defined(CONFIG_NETFILTER_XT_TARGET_TRACE) || \ |
212 | defined(CONFIG_NETFILTER_XT_TARGET_TRACE_MODULE) | |
213 | /* This cries for unification! */ | |
022748a9 | 214 | static const char *const hooknames[] = { |
6e23ae2a PM |
215 | [NF_INET_PRE_ROUTING] = "PREROUTING", |
216 | [NF_INET_LOCAL_IN] = "INPUT", | |
217 | [NF_INET_FORWARD] = "FORWARD", | |
218 | [NF_INET_LOCAL_OUT] = "OUTPUT", | |
219 | [NF_INET_POST_ROUTING] = "POSTROUTING", | |
ba9dda3a JK |
220 | }; |
221 | ||
222 | enum nf_ip_trace_comments { | |
223 | NF_IP6_TRACE_COMMENT_RULE, | |
224 | NF_IP6_TRACE_COMMENT_RETURN, | |
225 | NF_IP6_TRACE_COMMENT_POLICY, | |
226 | }; | |
227 | ||
022748a9 | 228 | static const char *const comments[] = { |
ba9dda3a JK |
229 | [NF_IP6_TRACE_COMMENT_RULE] = "rule", |
230 | [NF_IP6_TRACE_COMMENT_RETURN] = "return", | |
231 | [NF_IP6_TRACE_COMMENT_POLICY] = "policy", | |
232 | }; | |
233 | ||
234 | static struct nf_loginfo trace_loginfo = { | |
235 | .type = NF_LOG_TYPE_LOG, | |
236 | .u = { | |
237 | .log = { | |
238 | .level = 4, | |
239 | .logflags = NF_LOG_MASK, | |
240 | }, | |
241 | }, | |
242 | }; | |
243 | ||
022748a9 | 244 | /* Mildly perf critical (only if packet tracing is on) */ |
ba9dda3a | 245 | static inline int |
d5d1baa1 | 246 | get_chainname_rulenum(const struct ip6t_entry *s, const struct ip6t_entry *e, |
4f2f6f23 JE |
247 | const char *hookname, const char **chainname, |
248 | const char **comment, unsigned int *rulenum) | |
ba9dda3a | 249 | { |
87a2e70d | 250 | const struct xt_standard_target *t = (void *)ip6t_get_target_c(s); |
ba9dda3a | 251 | |
243bf6e2 | 252 | if (strcmp(t->target.u.kernel.target->name, XT_ERROR_TARGET) == 0) { |
ba9dda3a JK |
253 | /* Head of user chain: ERROR target with chainname */ |
254 | *chainname = t->target.data; | |
255 | (*rulenum) = 0; | |
256 | } else if (s == e) { | |
257 | (*rulenum)++; | |
258 | ||
3666ed1c JP |
259 | if (s->target_offset == sizeof(struct ip6t_entry) && |
260 | strcmp(t->target.u.kernel.target->name, | |
243bf6e2 | 261 | XT_STANDARD_TARGET) == 0 && |
3666ed1c JP |
262 | t->verdict < 0 && |
263 | unconditional(&s->ipv6)) { | |
ba9dda3a JK |
264 | /* Tail of chains: STANDARD target (return/policy) */ |
265 | *comment = *chainname == hookname | |
4f2f6f23 JE |
266 | ? comments[NF_IP6_TRACE_COMMENT_POLICY] |
267 | : comments[NF_IP6_TRACE_COMMENT_RETURN]; | |
ba9dda3a JK |
268 | } |
269 | return 1; | |
270 | } else | |
271 | (*rulenum)++; | |
272 | ||
273 | return 0; | |
274 | } | |
275 | ||
d5d1baa1 | 276 | static void trace_packet(const struct sk_buff *skb, |
ba9dda3a JK |
277 | unsigned int hook, |
278 | const struct net_device *in, | |
279 | const struct net_device *out, | |
ecb6f85e | 280 | const char *tablename, |
d5d1baa1 JE |
281 | const struct xt_table_info *private, |
282 | const struct ip6t_entry *e) | |
ba9dda3a | 283 | { |
d5d1baa1 | 284 | const void *table_base; |
5452e425 | 285 | const struct ip6t_entry *root; |
4f2f6f23 | 286 | const char *hookname, *chainname, *comment; |
72b2b1dd | 287 | const struct ip6t_entry *iter; |
ba9dda3a JK |
288 | unsigned int rulenum = 0; |
289 | ||
ccf5bd8c | 290 | table_base = private->entries[smp_processor_id()]; |
ba9dda3a JK |
291 | root = get_entry(table_base, private->hook_entry[hook]); |
292 | ||
4f2f6f23 JE |
293 | hookname = chainname = hooknames[hook]; |
294 | comment = comments[NF_IP6_TRACE_COMMENT_RULE]; | |
ba9dda3a | 295 | |
72b2b1dd JE |
296 | xt_entry_foreach(iter, root, private->size - private->hook_entry[hook]) |
297 | if (get_chainname_rulenum(iter, e, hookname, | |
298 | &chainname, &comment, &rulenum) != 0) | |
299 | break; | |
ba9dda3a JK |
300 | |
301 | nf_log_packet(AF_INET6, hook, skb, in, out, &trace_loginfo, | |
302 | "TRACE: %s:%s:%s:%u ", | |
303 | tablename, chainname, comment, rulenum); | |
304 | } | |
305 | #endif | |
306 | ||
98e86403 JE |
307 | static inline __pure struct ip6t_entry * |
308 | ip6t_next_entry(const struct ip6t_entry *entry) | |
309 | { | |
310 | return (void *)entry + entry->next_offset; | |
311 | } | |
312 | ||
1da177e4 LT |
313 | /* Returns one of the generic firewall policies, like NF_ACCEPT. */ |
314 | unsigned int | |
3db05fea | 315 | ip6t_do_table(struct sk_buff *skb, |
1da177e4 LT |
316 | unsigned int hook, |
317 | const struct net_device *in, | |
318 | const struct net_device *out, | |
fe1cb108 | 319 | struct xt_table *table) |
1da177e4 | 320 | { |
6b7d31fc | 321 | static const char nulldevname[IFNAMSIZ] __attribute__((aligned(sizeof(long)))); |
1da177e4 LT |
322 | /* Initializing verdict to NF_DROP keeps gcc happy. */ |
323 | unsigned int verdict = NF_DROP; | |
324 | const char *indev, *outdev; | |
d5d1baa1 | 325 | const void *table_base; |
f3c5c1bf JE |
326 | struct ip6t_entry *e, **jumpstack; |
327 | unsigned int *stackptr, origptr, cpu; | |
d5d1baa1 | 328 | const struct xt_table_info *private; |
de74c169 | 329 | struct xt_action_param acpar; |
7f5c6d4f | 330 | unsigned int addend; |
1da177e4 LT |
331 | |
332 | /* Initialization */ | |
333 | indev = in ? in->name : nulldevname; | |
334 | outdev = out ? out->name : nulldevname; | |
1da177e4 LT |
335 | /* We handle fragments by dealing with the first fragment as |
336 | * if it was a normal packet. All other fragments are treated | |
337 | * normally, except that they will NEVER match rules that ask | |
338 | * things we don't know, ie. tcp syn flag or ports). If the | |
339 | * rule is also a fragment-specific rule, non-fragments won't | |
340 | * match it. */ | |
b4ba2611 | 341 | acpar.hotdrop = false; |
de74c169 JE |
342 | acpar.in = in; |
343 | acpar.out = out; | |
344 | acpar.family = NFPROTO_IPV6; | |
345 | acpar.hooknum = hook; | |
1da177e4 | 346 | |
1da177e4 | 347 | IP_NF_ASSERT(table->valid_hooks & (1 << hook)); |
78454473 | 348 | |
7f5c6d4f ED |
349 | local_bh_disable(); |
350 | addend = xt_write_recseq_begin(); | |
942e4a2b | 351 | private = table->private; |
f3c5c1bf JE |
352 | cpu = smp_processor_id(); |
353 | table_base = private->entries[cpu]; | |
354 | jumpstack = (struct ip6t_entry **)private->jumpstack[cpu]; | |
7489aec8 | 355 | stackptr = per_cpu_ptr(private->stackptr, cpu); |
f3c5c1bf | 356 | origptr = *stackptr; |
78454473 | 357 | |
2e4e6a17 | 358 | e = get_entry(table_base, private->hook_entry[hook]); |
1da177e4 | 359 | |
1da177e4 | 360 | do { |
87a2e70d | 361 | const struct xt_entry_target *t; |
dcea992a | 362 | const struct xt_entry_match *ematch; |
a1ff4ac8 | 363 | |
1da177e4 | 364 | IP_NF_ASSERT(e); |
84018f55 | 365 | acpar.thoff = 0; |
a1ff4ac8 | 366 | if (!ip6_packet_match(skb, indev, outdev, &e->ipv6, |
b4ba2611 | 367 | &acpar.thoff, &acpar.fragoff, &acpar.hotdrop)) { |
dcea992a | 368 | no_match: |
a1ff4ac8 JE |
369 | e = ip6t_next_entry(e); |
370 | continue; | |
371 | } | |
1da177e4 | 372 | |
ef53d702 | 373 | xt_ematch_foreach(ematch, e) { |
de74c169 JE |
374 | acpar.match = ematch->u.kernel.match; |
375 | acpar.matchinfo = ematch->data; | |
376 | if (!acpar.match->match(skb, &acpar)) | |
dcea992a | 377 | goto no_match; |
ef53d702 | 378 | } |
dcea992a | 379 | |
261abc8c | 380 | ADD_COUNTER(e->counters, skb->len, 1); |
1da177e4 | 381 | |
d5d1baa1 | 382 | t = ip6t_get_target_c(e); |
a1ff4ac8 | 383 | IP_NF_ASSERT(t->u.kernel.target); |
ba9dda3a JK |
384 | |
385 | #if defined(CONFIG_NETFILTER_XT_TARGET_TRACE) || \ | |
386 | defined(CONFIG_NETFILTER_XT_TARGET_TRACE_MODULE) | |
a1ff4ac8 JE |
387 | /* The packet is traced: log it */ |
388 | if (unlikely(skb->nf_trace)) | |
389 | trace_packet(skb, hook, in, out, | |
390 | table->name, private, e); | |
ba9dda3a | 391 | #endif |
a1ff4ac8 JE |
392 | /* Standard target? */ |
393 | if (!t->u.kernel.target->target) { | |
394 | int v; | |
395 | ||
87a2e70d | 396 | v = ((struct xt_standard_target *)t)->verdict; |
a1ff4ac8 JE |
397 | if (v < 0) { |
398 | /* Pop from stack? */ | |
243bf6e2 | 399 | if (v != XT_RETURN) { |
95c96174 | 400 | verdict = (unsigned int)(-v) - 1; |
a1ff4ac8 | 401 | break; |
1da177e4 | 402 | } |
db856674 | 403 | if (*stackptr <= origptr) |
f3c5c1bf JE |
404 | e = get_entry(table_base, |
405 | private->underflow[hook]); | |
406 | else | |
407 | e = ip6t_next_entry(jumpstack[--*stackptr]); | |
a1ff4ac8 JE |
408 | continue; |
409 | } | |
3666ed1c JP |
410 | if (table_base + v != ip6t_next_entry(e) && |
411 | !(e->ipv6.flags & IP6T_F_GOTO)) { | |
f3c5c1bf JE |
412 | if (*stackptr >= private->stacksize) { |
413 | verdict = NF_DROP; | |
414 | break; | |
415 | } | |
416 | jumpstack[(*stackptr)++] = e; | |
a1ff4ac8 | 417 | } |
1da177e4 | 418 | |
a1ff4ac8 | 419 | e = get_entry(table_base, v); |
7a6b1c46 JE |
420 | continue; |
421 | } | |
422 | ||
de74c169 JE |
423 | acpar.target = t->u.kernel.target; |
424 | acpar.targinfo = t->data; | |
7eb35586 | 425 | |
de74c169 | 426 | verdict = t->u.kernel.target->target(skb, &acpar); |
243bf6e2 | 427 | if (verdict == XT_CONTINUE) |
7a6b1c46 JE |
428 | e = ip6t_next_entry(e); |
429 | else | |
430 | /* Verdict */ | |
431 | break; | |
b4ba2611 | 432 | } while (!acpar.hotdrop); |
1da177e4 | 433 | |
f3c5c1bf | 434 | *stackptr = origptr; |
7f5c6d4f ED |
435 | |
436 | xt_write_recseq_end(addend); | |
437 | local_bh_enable(); | |
1da177e4 LT |
438 | |
439 | #ifdef DEBUG_ALLOW_ALL | |
440 | return NF_ACCEPT; | |
441 | #else | |
b4ba2611 | 442 | if (acpar.hotdrop) |
1da177e4 LT |
443 | return NF_DROP; |
444 | else return verdict; | |
445 | #endif | |
446 | } | |
447 | ||
1da177e4 LT |
448 | /* Figures out from what hook each rule can be called: returns 0 if |
449 | there are loops. Puts hook bitmask in comefrom. */ | |
450 | static int | |
d5d1baa1 | 451 | mark_source_chains(const struct xt_table_info *newinfo, |
31836064 | 452 | unsigned int valid_hooks, void *entry0) |
1da177e4 LT |
453 | { |
454 | unsigned int hook; | |
455 | ||
456 | /* No recursion; use packet counter to save back ptrs (reset | |
457 | to 0 as we leave), and comefrom to save source hook bitmask */ | |
6e23ae2a | 458 | for (hook = 0; hook < NF_INET_NUMHOOKS; hook++) { |
1da177e4 | 459 | unsigned int pos = newinfo->hook_entry[hook]; |
9c547959 | 460 | struct ip6t_entry *e = (struct ip6t_entry *)(entry0 + pos); |
1da177e4 LT |
461 | |
462 | if (!(valid_hooks & (1 << hook))) | |
463 | continue; | |
464 | ||
465 | /* Set initial back pointer. */ | |
466 | e->counters.pcnt = pos; | |
467 | ||
468 | for (;;) { | |
87a2e70d | 469 | const struct xt_standard_target *t |
d5d1baa1 | 470 | = (void *)ip6t_get_target_c(e); |
9c547959 | 471 | int visited = e->comefrom & (1 << hook); |
1da177e4 | 472 | |
6e23ae2a | 473 | if (e->comefrom & (1 << NF_INET_NUMHOOKS)) { |
654d0fbd | 474 | pr_err("iptables: loop hook %u pos %u %08X.\n", |
1da177e4 LT |
475 | hook, pos, e->comefrom); |
476 | return 0; | |
477 | } | |
9c547959 | 478 | e->comefrom |= ((1 << hook) | (1 << NF_INET_NUMHOOKS)); |
1da177e4 LT |
479 | |
480 | /* Unconditional return/END. */ | |
3666ed1c JP |
481 | if ((e->target_offset == sizeof(struct ip6t_entry) && |
482 | (strcmp(t->target.u.user.name, | |
243bf6e2 | 483 | XT_STANDARD_TARGET) == 0) && |
3666ed1c JP |
484 | t->verdict < 0 && |
485 | unconditional(&e->ipv6)) || visited) { | |
1da177e4 LT |
486 | unsigned int oldpos, size; |
487 | ||
1f9352ae | 488 | if ((strcmp(t->target.u.user.name, |
243bf6e2 | 489 | XT_STANDARD_TARGET) == 0) && |
1f9352ae | 490 | t->verdict < -NF_MAX_VERDICT - 1) { |
74c9c0c1 DM |
491 | duprintf("mark_source_chains: bad " |
492 | "negative verdict (%i)\n", | |
493 | t->verdict); | |
494 | return 0; | |
495 | } | |
496 | ||
1da177e4 LT |
497 | /* Return: backtrack through the last |
498 | big jump. */ | |
499 | do { | |
6e23ae2a | 500 | e->comefrom ^= (1<<NF_INET_NUMHOOKS); |
1da177e4 LT |
501 | #ifdef DEBUG_IP_FIREWALL_USER |
502 | if (e->comefrom | |
6e23ae2a | 503 | & (1 << NF_INET_NUMHOOKS)) { |
1da177e4 LT |
504 | duprintf("Back unset " |
505 | "on hook %u " | |
506 | "rule %u\n", | |
507 | hook, pos); | |
508 | } | |
509 | #endif | |
510 | oldpos = pos; | |
511 | pos = e->counters.pcnt; | |
512 | e->counters.pcnt = 0; | |
513 | ||
514 | /* We're at the start. */ | |
515 | if (pos == oldpos) | |
516 | goto next; | |
517 | ||
518 | e = (struct ip6t_entry *) | |
31836064 | 519 | (entry0 + pos); |
1da177e4 LT |
520 | } while (oldpos == pos + e->next_offset); |
521 | ||
522 | /* Move along one */ | |
523 | size = e->next_offset; | |
524 | e = (struct ip6t_entry *) | |
31836064 | 525 | (entry0 + pos + size); |
1da177e4 LT |
526 | e->counters.pcnt = pos; |
527 | pos += size; | |
528 | } else { | |
529 | int newpos = t->verdict; | |
530 | ||
531 | if (strcmp(t->target.u.user.name, | |
243bf6e2 | 532 | XT_STANDARD_TARGET) == 0 && |
3666ed1c | 533 | newpos >= 0) { |
74c9c0c1 DM |
534 | if (newpos > newinfo->size - |
535 | sizeof(struct ip6t_entry)) { | |
536 | duprintf("mark_source_chains: " | |
537 | "bad verdict (%i)\n", | |
538 | newpos); | |
539 | return 0; | |
540 | } | |
1da177e4 LT |
541 | /* This a jump; chase it. */ |
542 | duprintf("Jump rule %u -> %u\n", | |
543 | pos, newpos); | |
544 | } else { | |
545 | /* ... this is a fallthru */ | |
546 | newpos = pos + e->next_offset; | |
547 | } | |
548 | e = (struct ip6t_entry *) | |
31836064 | 549 | (entry0 + newpos); |
1da177e4 LT |
550 | e->counters.pcnt = pos; |
551 | pos = newpos; | |
552 | } | |
553 | } | |
554 | next: | |
555 | duprintf("Finished chain %u\n", hook); | |
556 | } | |
557 | return 1; | |
558 | } | |
559 | ||
87a2e70d | 560 | static void cleanup_match(struct xt_entry_match *m, struct net *net) |
1da177e4 | 561 | { |
6be3d859 JE |
562 | struct xt_mtdtor_param par; |
563 | ||
f54e9367 | 564 | par.net = net; |
6be3d859 JE |
565 | par.match = m->u.kernel.match; |
566 | par.matchinfo = m->data; | |
916a917d | 567 | par.family = NFPROTO_IPV6; |
6be3d859 JE |
568 | if (par.match->destroy != NULL) |
569 | par.match->destroy(&par); | |
570 | module_put(par.match->me); | |
1da177e4 LT |
571 | } |
572 | ||
022748a9 | 573 | static int |
d5d1baa1 | 574 | check_entry(const struct ip6t_entry *e, const char *name) |
f173c8a1 | 575 | { |
87a2e70d | 576 | const struct xt_entry_target *t; |
f173c8a1 PM |
577 | |
578 | if (!ip6_checkentry(&e->ipv6)) { | |
579 | duprintf("ip_tables: ip check failed %p %s.\n", e, name); | |
580 | return -EINVAL; | |
581 | } | |
582 | ||
87a2e70d | 583 | if (e->target_offset + sizeof(struct xt_entry_target) > |
f173c8a1 PM |
584 | e->next_offset) |
585 | return -EINVAL; | |
586 | ||
d5d1baa1 | 587 | t = ip6t_get_target_c(e); |
f173c8a1 PM |
588 | if (e->target_offset + t->u.target_size > e->next_offset) |
589 | return -EINVAL; | |
590 | ||
591 | return 0; | |
592 | } | |
593 | ||
87a2e70d | 594 | static int check_match(struct xt_entry_match *m, struct xt_mtchk_param *par) |
f173c8a1 | 595 | { |
9b4fce7a | 596 | const struct ip6t_ip6 *ipv6 = par->entryinfo; |
f173c8a1 PM |
597 | int ret; |
598 | ||
9b4fce7a JE |
599 | par->match = m->u.kernel.match; |
600 | par->matchinfo = m->data; | |
601 | ||
916a917d | 602 | ret = xt_check_match(par, m->u.match_size - sizeof(*m), |
9b4fce7a | 603 | ipv6->proto, ipv6->invflags & IP6T_INV_PROTO); |
367c6790 | 604 | if (ret < 0) { |
f173c8a1 | 605 | duprintf("ip_tables: check failed for `%s'.\n", |
9b4fce7a | 606 | par.match->name); |
367c6790 | 607 | return ret; |
f173c8a1 | 608 | } |
367c6790 | 609 | return 0; |
f173c8a1 PM |
610 | } |
611 | ||
022748a9 | 612 | static int |
87a2e70d | 613 | find_check_match(struct xt_entry_match *m, struct xt_mtchk_param *par) |
1da177e4 | 614 | { |
6709dbbb | 615 | struct xt_match *match; |
3cdc7c95 | 616 | int ret; |
1da177e4 | 617 | |
fd0ec0e6 JE |
618 | match = xt_request_find_match(NFPROTO_IPV6, m->u.user.name, |
619 | m->u.user.revision); | |
620 | if (IS_ERR(match)) { | |
f173c8a1 | 621 | duprintf("find_check_match: `%s' not found\n", m->u.user.name); |
fd0ec0e6 | 622 | return PTR_ERR(match); |
1da177e4 LT |
623 | } |
624 | m->u.kernel.match = match; | |
1da177e4 | 625 | |
6bdb331b | 626 | ret = check_match(m, par); |
3cdc7c95 PM |
627 | if (ret) |
628 | goto err; | |
629 | ||
1da177e4 | 630 | return 0; |
3cdc7c95 PM |
631 | err: |
632 | module_put(m->u.kernel.match->me); | |
633 | return ret; | |
1da177e4 LT |
634 | } |
635 | ||
add67461 | 636 | static int check_target(struct ip6t_entry *e, struct net *net, const char *name) |
1da177e4 | 637 | { |
87a2e70d | 638 | struct xt_entry_target *t = ip6t_get_target(e); |
af5d6dc2 | 639 | struct xt_tgchk_param par = { |
add67461 | 640 | .net = net, |
af5d6dc2 JE |
641 | .table = name, |
642 | .entryinfo = e, | |
643 | .target = t->u.kernel.target, | |
644 | .targinfo = t->data, | |
645 | .hook_mask = e->comefrom, | |
916a917d | 646 | .family = NFPROTO_IPV6, |
af5d6dc2 | 647 | }; |
1da177e4 | 648 | int ret; |
1da177e4 | 649 | |
f173c8a1 | 650 | t = ip6t_get_target(e); |
916a917d | 651 | ret = xt_check_target(&par, t->u.target_size - sizeof(*t), |
af5d6dc2 | 652 | e->ipv6.proto, e->ipv6.invflags & IP6T_INV_PROTO); |
367c6790 | 653 | if (ret < 0) { |
f173c8a1 PM |
654 | duprintf("ip_tables: check failed for `%s'.\n", |
655 | t->u.kernel.target->name); | |
367c6790 | 656 | return ret; |
1da177e4 | 657 | } |
367c6790 | 658 | return 0; |
f173c8a1 | 659 | } |
1da177e4 | 660 | |
022748a9 | 661 | static int |
a83d8e8d | 662 | find_check_entry(struct ip6t_entry *e, struct net *net, const char *name, |
0559518b | 663 | unsigned int size) |
f173c8a1 | 664 | { |
87a2e70d | 665 | struct xt_entry_target *t; |
f173c8a1 PM |
666 | struct xt_target *target; |
667 | int ret; | |
668 | unsigned int j; | |
9b4fce7a | 669 | struct xt_mtchk_param mtpar; |
dcea992a | 670 | struct xt_entry_match *ematch; |
f173c8a1 PM |
671 | |
672 | ret = check_entry(e, name); | |
673 | if (ret) | |
674 | return ret; | |
590bdf7f | 675 | |
1da177e4 | 676 | j = 0; |
a83d8e8d | 677 | mtpar.net = net; |
9b4fce7a JE |
678 | mtpar.table = name; |
679 | mtpar.entryinfo = &e->ipv6; | |
680 | mtpar.hook_mask = e->comefrom; | |
916a917d | 681 | mtpar.family = NFPROTO_IPV6; |
dcea992a | 682 | xt_ematch_foreach(ematch, e) { |
6bdb331b | 683 | ret = find_check_match(ematch, &mtpar); |
dcea992a | 684 | if (ret != 0) |
6bdb331b JE |
685 | goto cleanup_matches; |
686 | ++j; | |
dcea992a | 687 | } |
1da177e4 LT |
688 | |
689 | t = ip6t_get_target(e); | |
d2a7b6ba JE |
690 | target = xt_request_find_target(NFPROTO_IPV6, t->u.user.name, |
691 | t->u.user.revision); | |
692 | if (IS_ERR(target)) { | |
f173c8a1 | 693 | duprintf("find_check_entry: `%s' not found\n", t->u.user.name); |
d2a7b6ba | 694 | ret = PTR_ERR(target); |
1da177e4 LT |
695 | goto cleanup_matches; |
696 | } | |
697 | t->u.kernel.target = target; | |
6b7d31fc | 698 | |
add67461 | 699 | ret = check_target(e, net, name); |
3cdc7c95 PM |
700 | if (ret) |
701 | goto err; | |
1da177e4 | 702 | return 0; |
3cdc7c95 PM |
703 | err: |
704 | module_put(t->u.kernel.target->me); | |
1da177e4 | 705 | cleanup_matches: |
6bdb331b JE |
706 | xt_ematch_foreach(ematch, e) { |
707 | if (j-- == 0) | |
dcea992a | 708 | break; |
6bdb331b JE |
709 | cleanup_match(ematch, net); |
710 | } | |
1da177e4 LT |
711 | return ret; |
712 | } | |
713 | ||
d5d1baa1 | 714 | static bool check_underflow(const struct ip6t_entry *e) |
e2fe35c1 | 715 | { |
87a2e70d | 716 | const struct xt_entry_target *t; |
e2fe35c1 JE |
717 | unsigned int verdict; |
718 | ||
719 | if (!unconditional(&e->ipv6)) | |
720 | return false; | |
d5d1baa1 | 721 | t = ip6t_get_target_c(e); |
e2fe35c1 JE |
722 | if (strcmp(t->u.user.name, XT_STANDARD_TARGET) != 0) |
723 | return false; | |
87a2e70d | 724 | verdict = ((struct xt_standard_target *)t)->verdict; |
e2fe35c1 JE |
725 | verdict = -verdict - 1; |
726 | return verdict == NF_DROP || verdict == NF_ACCEPT; | |
727 | } | |
728 | ||
022748a9 | 729 | static int |
1da177e4 | 730 | check_entry_size_and_hooks(struct ip6t_entry *e, |
2e4e6a17 | 731 | struct xt_table_info *newinfo, |
d5d1baa1 JE |
732 | const unsigned char *base, |
733 | const unsigned char *limit, | |
1da177e4 LT |
734 | const unsigned int *hook_entries, |
735 | const unsigned int *underflows, | |
0559518b | 736 | unsigned int valid_hooks) |
1da177e4 LT |
737 | { |
738 | unsigned int h; | |
739 | ||
3666ed1c JP |
740 | if ((unsigned long)e % __alignof__(struct ip6t_entry) != 0 || |
741 | (unsigned char *)e + sizeof(struct ip6t_entry) >= limit) { | |
1da177e4 LT |
742 | duprintf("Bad offset %p\n", e); |
743 | return -EINVAL; | |
744 | } | |
745 | ||
746 | if (e->next_offset | |
87a2e70d | 747 | < sizeof(struct ip6t_entry) + sizeof(struct xt_entry_target)) { |
1da177e4 LT |
748 | duprintf("checking: element %p size %u\n", |
749 | e, e->next_offset); | |
750 | return -EINVAL; | |
751 | } | |
752 | ||
753 | /* Check hooks & underflows */ | |
6e23ae2a | 754 | for (h = 0; h < NF_INET_NUMHOOKS; h++) { |
a7d51738 JE |
755 | if (!(valid_hooks & (1 << h))) |
756 | continue; | |
1da177e4 LT |
757 | if ((unsigned char *)e - base == hook_entries[h]) |
758 | newinfo->hook_entry[h] = hook_entries[h]; | |
90e7d4ab | 759 | if ((unsigned char *)e - base == underflows[h]) { |
e2fe35c1 JE |
760 | if (!check_underflow(e)) { |
761 | pr_err("Underflows must be unconditional and " | |
762 | "use the STANDARD target with " | |
763 | "ACCEPT/DROP\n"); | |
90e7d4ab JE |
764 | return -EINVAL; |
765 | } | |
1da177e4 | 766 | newinfo->underflow[h] = underflows[h]; |
90e7d4ab | 767 | } |
1da177e4 LT |
768 | } |
769 | ||
1da177e4 | 770 | /* Clear counters and comefrom */ |
2e4e6a17 | 771 | e->counters = ((struct xt_counters) { 0, 0 }); |
1da177e4 | 772 | e->comefrom = 0; |
1da177e4 LT |
773 | return 0; |
774 | } | |
775 | ||
0559518b | 776 | static void cleanup_entry(struct ip6t_entry *e, struct net *net) |
1da177e4 | 777 | { |
a2df1648 | 778 | struct xt_tgdtor_param par; |
87a2e70d | 779 | struct xt_entry_target *t; |
dcea992a | 780 | struct xt_entry_match *ematch; |
1da177e4 | 781 | |
1da177e4 | 782 | /* Cleanup all matches */ |
dcea992a | 783 | xt_ematch_foreach(ematch, e) |
6bdb331b | 784 | cleanup_match(ematch, net); |
1da177e4 | 785 | t = ip6t_get_target(e); |
a2df1648 | 786 | |
add67461 | 787 | par.net = net; |
a2df1648 JE |
788 | par.target = t->u.kernel.target; |
789 | par.targinfo = t->data; | |
916a917d | 790 | par.family = NFPROTO_IPV6; |
a2df1648 JE |
791 | if (par.target->destroy != NULL) |
792 | par.target->destroy(&par); | |
793 | module_put(par.target->me); | |
1da177e4 LT |
794 | } |
795 | ||
796 | /* Checks and translates the user-supplied table segment (held in | |
797 | newinfo) */ | |
798 | static int | |
0f234214 JE |
799 | translate_table(struct net *net, struct xt_table_info *newinfo, void *entry0, |
800 | const struct ip6t_replace *repl) | |
1da177e4 | 801 | { |
72b2b1dd | 802 | struct ip6t_entry *iter; |
1da177e4 | 803 | unsigned int i; |
72b2b1dd | 804 | int ret = 0; |
1da177e4 | 805 | |
0f234214 JE |
806 | newinfo->size = repl->size; |
807 | newinfo->number = repl->num_entries; | |
1da177e4 LT |
808 | |
809 | /* Init all hooks to impossible value. */ | |
6e23ae2a | 810 | for (i = 0; i < NF_INET_NUMHOOKS; i++) { |
1da177e4 LT |
811 | newinfo->hook_entry[i] = 0xFFFFFFFF; |
812 | newinfo->underflow[i] = 0xFFFFFFFF; | |
813 | } | |
814 | ||
815 | duprintf("translate_table: size %u\n", newinfo->size); | |
816 | i = 0; | |
817 | /* Walk through entries, checking offsets. */ | |
72b2b1dd JE |
818 | xt_entry_foreach(iter, entry0, newinfo->size) { |
819 | ret = check_entry_size_and_hooks(iter, newinfo, entry0, | |
6b4ff2d7 JE |
820 | entry0 + repl->size, |
821 | repl->hook_entry, | |
822 | repl->underflow, | |
823 | repl->valid_hooks); | |
72b2b1dd | 824 | if (ret != 0) |
0559518b JE |
825 | return ret; |
826 | ++i; | |
f3c5c1bf JE |
827 | if (strcmp(ip6t_get_target(iter)->u.user.name, |
828 | XT_ERROR_TARGET) == 0) | |
829 | ++newinfo->stacksize; | |
72b2b1dd | 830 | } |
1da177e4 | 831 | |
0f234214 | 832 | if (i != repl->num_entries) { |
1da177e4 | 833 | duprintf("translate_table: %u not %u entries\n", |
0f234214 | 834 | i, repl->num_entries); |
1da177e4 LT |
835 | return -EINVAL; |
836 | } | |
837 | ||
838 | /* Check hooks all assigned */ | |
6e23ae2a | 839 | for (i = 0; i < NF_INET_NUMHOOKS; i++) { |
1da177e4 | 840 | /* Only hooks which are valid */ |
0f234214 | 841 | if (!(repl->valid_hooks & (1 << i))) |
1da177e4 LT |
842 | continue; |
843 | if (newinfo->hook_entry[i] == 0xFFFFFFFF) { | |
844 | duprintf("Invalid hook entry %u %u\n", | |
0f234214 | 845 | i, repl->hook_entry[i]); |
1da177e4 LT |
846 | return -EINVAL; |
847 | } | |
848 | if (newinfo->underflow[i] == 0xFFFFFFFF) { | |
849 | duprintf("Invalid underflow %u %u\n", | |
0f234214 | 850 | i, repl->underflow[i]); |
1da177e4 LT |
851 | return -EINVAL; |
852 | } | |
853 | } | |
854 | ||
0f234214 | 855 | if (!mark_source_chains(newinfo, repl->valid_hooks, entry0)) |
74c9c0c1 DM |
856 | return -ELOOP; |
857 | ||
1da177e4 LT |
858 | /* Finally, each sanity check must pass */ |
859 | i = 0; | |
72b2b1dd | 860 | xt_entry_foreach(iter, entry0, newinfo->size) { |
0f234214 | 861 | ret = find_check_entry(iter, net, repl->name, repl->size); |
72b2b1dd JE |
862 | if (ret != 0) |
863 | break; | |
0559518b | 864 | ++i; |
72b2b1dd | 865 | } |
1da177e4 | 866 | |
74c9c0c1 | 867 | if (ret != 0) { |
0559518b JE |
868 | xt_entry_foreach(iter, entry0, newinfo->size) { |
869 | if (i-- == 0) | |
72b2b1dd | 870 | break; |
0559518b JE |
871 | cleanup_entry(iter, net); |
872 | } | |
74c9c0c1 DM |
873 | return ret; |
874 | } | |
1da177e4 LT |
875 | |
876 | /* And one copy for every other CPU */ | |
6f912042 | 877 | for_each_possible_cpu(i) { |
31836064 ED |
878 | if (newinfo->entries[i] && newinfo->entries[i] != entry0) |
879 | memcpy(newinfo->entries[i], entry0, newinfo->size); | |
1da177e4 LT |
880 | } |
881 | ||
9c547959 | 882 | return ret; |
1da177e4 LT |
883 | } |
884 | ||
1da177e4 | 885 | static void |
2e4e6a17 HW |
886 | get_counters(const struct xt_table_info *t, |
887 | struct xt_counters counters[]) | |
1da177e4 | 888 | { |
72b2b1dd | 889 | struct ip6t_entry *iter; |
1da177e4 LT |
890 | unsigned int cpu; |
891 | unsigned int i; | |
892 | ||
6f912042 | 893 | for_each_possible_cpu(cpu) { |
7f5c6d4f | 894 | seqcount_t *s = &per_cpu(xt_recseq, cpu); |
83723d60 | 895 | |
1da177e4 | 896 | i = 0; |
0559518b | 897 | xt_entry_foreach(iter, t->entries[cpu], t->size) { |
83723d60 ED |
898 | u64 bcnt, pcnt; |
899 | unsigned int start; | |
900 | ||
901 | do { | |
7f5c6d4f | 902 | start = read_seqcount_begin(s); |
83723d60 ED |
903 | bcnt = iter->counters.bcnt; |
904 | pcnt = iter->counters.pcnt; | |
7f5c6d4f | 905 | } while (read_seqcount_retry(s, start)); |
83723d60 ED |
906 | |
907 | ADD_COUNTER(counters[i], bcnt, pcnt); | |
0559518b JE |
908 | ++i; |
909 | } | |
1da177e4 | 910 | } |
78454473 SH |
911 | } |
912 | ||
d5d1baa1 | 913 | static struct xt_counters *alloc_counters(const struct xt_table *table) |
1da177e4 | 914 | { |
ed1a6f5e | 915 | unsigned int countersize; |
2e4e6a17 | 916 | struct xt_counters *counters; |
d5d1baa1 | 917 | const struct xt_table_info *private = table->private; |
1da177e4 LT |
918 | |
919 | /* We need atomic snapshot of counters: rest doesn't change | |
920 | (other than comefrom, which userspace doesn't care | |
921 | about). */ | |
2e4e6a17 | 922 | countersize = sizeof(struct xt_counters) * private->number; |
83723d60 | 923 | counters = vzalloc(countersize); |
1da177e4 LT |
924 | |
925 | if (counters == NULL) | |
942e4a2b | 926 | return ERR_PTR(-ENOMEM); |
78454473 | 927 | |
942e4a2b | 928 | get_counters(private, counters); |
78454473 | 929 | |
49a88d18 | 930 | return counters; |
ed1a6f5e PM |
931 | } |
932 | ||
933 | static int | |
934 | copy_entries_to_user(unsigned int total_size, | |
d5d1baa1 | 935 | const struct xt_table *table, |
ed1a6f5e PM |
936 | void __user *userptr) |
937 | { | |
938 | unsigned int off, num; | |
d5d1baa1 | 939 | const struct ip6t_entry *e; |
ed1a6f5e | 940 | struct xt_counters *counters; |
5452e425 | 941 | const struct xt_table_info *private = table->private; |
ed1a6f5e | 942 | int ret = 0; |
5452e425 | 943 | const void *loc_cpu_entry; |
ed1a6f5e PM |
944 | |
945 | counters = alloc_counters(table); | |
946 | if (IS_ERR(counters)) | |
947 | return PTR_ERR(counters); | |
948 | ||
9c547959 PM |
949 | /* choose the copy that is on our node/cpu, ... |
950 | * This choice is lazy (because current thread is | |
951 | * allowed to migrate to another cpu) | |
952 | */ | |
2e4e6a17 | 953 | loc_cpu_entry = private->entries[raw_smp_processor_id()]; |
31836064 | 954 | if (copy_to_user(userptr, loc_cpu_entry, total_size) != 0) { |
1da177e4 LT |
955 | ret = -EFAULT; |
956 | goto free_counters; | |
957 | } | |
958 | ||
959 | /* FIXME: use iterator macros --RR */ | |
960 | /* ... then go back and fix counters and names */ | |
961 | for (off = 0, num = 0; off < total_size; off += e->next_offset, num++){ | |
962 | unsigned int i; | |
87a2e70d JE |
963 | const struct xt_entry_match *m; |
964 | const struct xt_entry_target *t; | |
1da177e4 | 965 | |
31836064 | 966 | e = (struct ip6t_entry *)(loc_cpu_entry + off); |
1da177e4 LT |
967 | if (copy_to_user(userptr + off |
968 | + offsetof(struct ip6t_entry, counters), | |
969 | &counters[num], | |
970 | sizeof(counters[num])) != 0) { | |
971 | ret = -EFAULT; | |
972 | goto free_counters; | |
973 | } | |
974 | ||
975 | for (i = sizeof(struct ip6t_entry); | |
976 | i < e->target_offset; | |
977 | i += m->u.match_size) { | |
978 | m = (void *)e + i; | |
979 | ||
980 | if (copy_to_user(userptr + off + i | |
87a2e70d | 981 | + offsetof(struct xt_entry_match, |
1da177e4 LT |
982 | u.user.name), |
983 | m->u.kernel.match->name, | |
984 | strlen(m->u.kernel.match->name)+1) | |
985 | != 0) { | |
986 | ret = -EFAULT; | |
987 | goto free_counters; | |
988 | } | |
989 | } | |
990 | ||
d5d1baa1 | 991 | t = ip6t_get_target_c(e); |
1da177e4 | 992 | if (copy_to_user(userptr + off + e->target_offset |
87a2e70d | 993 | + offsetof(struct xt_entry_target, |
1da177e4 LT |
994 | u.user.name), |
995 | t->u.kernel.target->name, | |
996 | strlen(t->u.kernel.target->name)+1) != 0) { | |
997 | ret = -EFAULT; | |
998 | goto free_counters; | |
999 | } | |
1000 | } | |
1001 | ||
1002 | free_counters: | |
1003 | vfree(counters); | |
1004 | return ret; | |
1005 | } | |
1006 | ||
3bc3fe5e | 1007 | #ifdef CONFIG_COMPAT |
739674fb | 1008 | static void compat_standard_from_user(void *dst, const void *src) |
3bc3fe5e PM |
1009 | { |
1010 | int v = *(compat_int_t *)src; | |
1011 | ||
1012 | if (v > 0) | |
1013 | v += xt_compat_calc_jump(AF_INET6, v); | |
1014 | memcpy(dst, &v, sizeof(v)); | |
1015 | } | |
1016 | ||
739674fb | 1017 | static int compat_standard_to_user(void __user *dst, const void *src) |
3bc3fe5e PM |
1018 | { |
1019 | compat_int_t cv = *(int *)src; | |
1020 | ||
1021 | if (cv > 0) | |
1022 | cv -= xt_compat_calc_jump(AF_INET6, cv); | |
1023 | return copy_to_user(dst, &cv, sizeof(cv)) ? -EFAULT : 0; | |
1024 | } | |
1025 | ||
d5d1baa1 | 1026 | static int compat_calc_entry(const struct ip6t_entry *e, |
3bc3fe5e | 1027 | const struct xt_table_info *info, |
d5d1baa1 | 1028 | const void *base, struct xt_table_info *newinfo) |
3bc3fe5e | 1029 | { |
dcea992a | 1030 | const struct xt_entry_match *ematch; |
87a2e70d | 1031 | const struct xt_entry_target *t; |
3bc3fe5e PM |
1032 | unsigned int entry_offset; |
1033 | int off, i, ret; | |
1034 | ||
1035 | off = sizeof(struct ip6t_entry) - sizeof(struct compat_ip6t_entry); | |
1036 | entry_offset = (void *)e - base; | |
dcea992a | 1037 | xt_ematch_foreach(ematch, e) |
6bdb331b | 1038 | off += xt_compat_match_offset(ematch->u.kernel.match); |
d5d1baa1 | 1039 | t = ip6t_get_target_c(e); |
3bc3fe5e PM |
1040 | off += xt_compat_target_offset(t->u.kernel.target); |
1041 | newinfo->size -= off; | |
1042 | ret = xt_compat_add_offset(AF_INET6, entry_offset, off); | |
1043 | if (ret) | |
1044 | return ret; | |
1045 | ||
1046 | for (i = 0; i < NF_INET_NUMHOOKS; i++) { | |
1047 | if (info->hook_entry[i] && | |
1048 | (e < (struct ip6t_entry *)(base + info->hook_entry[i]))) | |
1049 | newinfo->hook_entry[i] -= off; | |
1050 | if (info->underflow[i] && | |
1051 | (e < (struct ip6t_entry *)(base + info->underflow[i]))) | |
1052 | newinfo->underflow[i] -= off; | |
1053 | } | |
1054 | return 0; | |
1055 | } | |
1056 | ||
1057 | static int compat_table_info(const struct xt_table_info *info, | |
1058 | struct xt_table_info *newinfo) | |
1059 | { | |
72b2b1dd | 1060 | struct ip6t_entry *iter; |
3bc3fe5e | 1061 | void *loc_cpu_entry; |
0559518b | 1062 | int ret; |
3bc3fe5e PM |
1063 | |
1064 | if (!newinfo || !info) | |
1065 | return -EINVAL; | |
1066 | ||
1067 | /* we dont care about newinfo->entries[] */ | |
1068 | memcpy(newinfo, info, offsetof(struct xt_table_info, entries)); | |
1069 | newinfo->initial_entries = 0; | |
1070 | loc_cpu_entry = info->entries[raw_smp_processor_id()]; | |
255d0dc3 | 1071 | xt_compat_init_offsets(AF_INET6, info->number); |
72b2b1dd JE |
1072 | xt_entry_foreach(iter, loc_cpu_entry, info->size) { |
1073 | ret = compat_calc_entry(iter, info, loc_cpu_entry, newinfo); | |
1074 | if (ret != 0) | |
0559518b | 1075 | return ret; |
72b2b1dd | 1076 | } |
0559518b | 1077 | return 0; |
3bc3fe5e PM |
1078 | } |
1079 | #endif | |
1080 | ||
d5d1baa1 JE |
1081 | static int get_info(struct net *net, void __user *user, |
1082 | const int *len, int compat) | |
433665c9 | 1083 | { |
12b00c2c | 1084 | char name[XT_TABLE_MAXNAMELEN]; |
433665c9 PM |
1085 | struct xt_table *t; |
1086 | int ret; | |
1087 | ||
1088 | if (*len != sizeof(struct ip6t_getinfo)) { | |
c9d8fe13 | 1089 | duprintf("length %u != %zu\n", *len, |
433665c9 PM |
1090 | sizeof(struct ip6t_getinfo)); |
1091 | return -EINVAL; | |
1092 | } | |
1093 | ||
1094 | if (copy_from_user(name, user, sizeof(name)) != 0) | |
1095 | return -EFAULT; | |
1096 | ||
12b00c2c | 1097 | name[XT_TABLE_MAXNAMELEN-1] = '\0'; |
3bc3fe5e PM |
1098 | #ifdef CONFIG_COMPAT |
1099 | if (compat) | |
1100 | xt_compat_lock(AF_INET6); | |
1101 | #endif | |
336b517f | 1102 | t = try_then_request_module(xt_find_table_lock(net, AF_INET6, name), |
433665c9 PM |
1103 | "ip6table_%s", name); |
1104 | if (t && !IS_ERR(t)) { | |
1105 | struct ip6t_getinfo info; | |
5452e425 | 1106 | const struct xt_table_info *private = t->private; |
3bc3fe5e | 1107 | #ifdef CONFIG_COMPAT |
14c7dbe0 AD |
1108 | struct xt_table_info tmp; |
1109 | ||
3bc3fe5e | 1110 | if (compat) { |
3bc3fe5e PM |
1111 | ret = compat_table_info(private, &tmp); |
1112 | xt_compat_flush_offsets(AF_INET6); | |
1113 | private = &tmp; | |
1114 | } | |
1115 | #endif | |
cccbe5ef | 1116 | memset(&info, 0, sizeof(info)); |
433665c9 PM |
1117 | info.valid_hooks = t->valid_hooks; |
1118 | memcpy(info.hook_entry, private->hook_entry, | |
1119 | sizeof(info.hook_entry)); | |
1120 | memcpy(info.underflow, private->underflow, | |
1121 | sizeof(info.underflow)); | |
1122 | info.num_entries = private->number; | |
1123 | info.size = private->size; | |
b5dd674b | 1124 | strcpy(info.name, name); |
433665c9 PM |
1125 | |
1126 | if (copy_to_user(user, &info, *len) != 0) | |
1127 | ret = -EFAULT; | |
1128 | else | |
1129 | ret = 0; | |
1130 | ||
1131 | xt_table_unlock(t); | |
1132 | module_put(t->me); | |
1133 | } else | |
1134 | ret = t ? PTR_ERR(t) : -ENOENT; | |
3bc3fe5e PM |
1135 | #ifdef CONFIG_COMPAT |
1136 | if (compat) | |
1137 | xt_compat_unlock(AF_INET6); | |
1138 | #endif | |
433665c9 PM |
1139 | return ret; |
1140 | } | |
1141 | ||
1da177e4 | 1142 | static int |
d5d1baa1 JE |
1143 | get_entries(struct net *net, struct ip6t_get_entries __user *uptr, |
1144 | const int *len) | |
1da177e4 LT |
1145 | { |
1146 | int ret; | |
d924357c | 1147 | struct ip6t_get_entries get; |
2e4e6a17 | 1148 | struct xt_table *t; |
1da177e4 | 1149 | |
d924357c | 1150 | if (*len < sizeof(get)) { |
c9d8fe13 | 1151 | duprintf("get_entries: %u < %zu\n", *len, sizeof(get)); |
d924357c PM |
1152 | return -EINVAL; |
1153 | } | |
1154 | if (copy_from_user(&get, uptr, sizeof(get)) != 0) | |
1155 | return -EFAULT; | |
1156 | if (*len != sizeof(struct ip6t_get_entries) + get.size) { | |
c9d8fe13 PM |
1157 | duprintf("get_entries: %u != %zu\n", |
1158 | *len, sizeof(get) + get.size); | |
d924357c PM |
1159 | return -EINVAL; |
1160 | } | |
1161 | ||
336b517f | 1162 | t = xt_find_table_lock(net, AF_INET6, get.name); |
6b7d31fc | 1163 | if (t && !IS_ERR(t)) { |
2e4e6a17 HW |
1164 | struct xt_table_info *private = t->private; |
1165 | duprintf("t->private->number = %u\n", private->number); | |
d924357c | 1166 | if (get.size == private->size) |
2e4e6a17 | 1167 | ret = copy_entries_to_user(private->size, |
1da177e4 LT |
1168 | t, uptr->entrytable); |
1169 | else { | |
1170 | duprintf("get_entries: I've got %u not %u!\n", | |
9c547959 | 1171 | private->size, get.size); |
544473c1 | 1172 | ret = -EAGAIN; |
1da177e4 | 1173 | } |
6b7d31fc | 1174 | module_put(t->me); |
2e4e6a17 | 1175 | xt_table_unlock(t); |
1da177e4 | 1176 | } else |
6b7d31fc | 1177 | ret = t ? PTR_ERR(t) : -ENOENT; |
1da177e4 LT |
1178 | |
1179 | return ret; | |
1180 | } | |
1181 | ||
1182 | static int | |
336b517f | 1183 | __do_replace(struct net *net, const char *name, unsigned int valid_hooks, |
3bc3fe5e PM |
1184 | struct xt_table_info *newinfo, unsigned int num_counters, |
1185 | void __user *counters_ptr) | |
1da177e4 LT |
1186 | { |
1187 | int ret; | |
2e4e6a17 | 1188 | struct xt_table *t; |
3bc3fe5e | 1189 | struct xt_table_info *oldinfo; |
2e4e6a17 | 1190 | struct xt_counters *counters; |
5452e425 | 1191 | const void *loc_cpu_old_entry; |
72b2b1dd | 1192 | struct ip6t_entry *iter; |
1da177e4 | 1193 | |
3bc3fe5e | 1194 | ret = 0; |
83723d60 | 1195 | counters = vzalloc(num_counters * sizeof(struct xt_counters)); |
1da177e4 LT |
1196 | if (!counters) { |
1197 | ret = -ENOMEM; | |
3bc3fe5e | 1198 | goto out; |
1da177e4 | 1199 | } |
1da177e4 | 1200 | |
336b517f | 1201 | t = try_then_request_module(xt_find_table_lock(net, AF_INET6, name), |
3bc3fe5e | 1202 | "ip6table_%s", name); |
6b7d31fc HW |
1203 | if (!t || IS_ERR(t)) { |
1204 | ret = t ? PTR_ERR(t) : -ENOENT; | |
1da177e4 | 1205 | goto free_newinfo_counters_untrans; |
6b7d31fc | 1206 | } |
1da177e4 LT |
1207 | |
1208 | /* You lied! */ | |
3bc3fe5e | 1209 | if (valid_hooks != t->valid_hooks) { |
1da177e4 | 1210 | duprintf("Valid hook crap: %08X vs %08X\n", |
3bc3fe5e | 1211 | valid_hooks, t->valid_hooks); |
1da177e4 | 1212 | ret = -EINVAL; |
6b7d31fc | 1213 | goto put_module; |
1da177e4 LT |
1214 | } |
1215 | ||
3bc3fe5e | 1216 | oldinfo = xt_replace_table(t, num_counters, newinfo, &ret); |
1da177e4 LT |
1217 | if (!oldinfo) |
1218 | goto put_module; | |
1219 | ||
1220 | /* Update module usage count based on number of rules */ | |
1221 | duprintf("do_replace: oldnum=%u, initnum=%u, newnum=%u\n", | |
1222 | oldinfo->number, oldinfo->initial_entries, newinfo->number); | |
1ab1457c YH |
1223 | if ((oldinfo->number > oldinfo->initial_entries) || |
1224 | (newinfo->number <= oldinfo->initial_entries)) | |
1da177e4 LT |
1225 | module_put(t->me); |
1226 | if ((oldinfo->number > oldinfo->initial_entries) && | |
1227 | (newinfo->number <= oldinfo->initial_entries)) | |
1228 | module_put(t->me); | |
1229 | ||
942e4a2b | 1230 | /* Get the old counters, and synchronize with replace */ |
1da177e4 | 1231 | get_counters(oldinfo, counters); |
942e4a2b | 1232 | |
1da177e4 | 1233 | /* Decrease module usage counts and free resource */ |
31836064 | 1234 | loc_cpu_old_entry = oldinfo->entries[raw_smp_processor_id()]; |
72b2b1dd | 1235 | xt_entry_foreach(iter, loc_cpu_old_entry, oldinfo->size) |
0559518b | 1236 | cleanup_entry(iter, net); |
72b2b1dd | 1237 | |
2e4e6a17 | 1238 | xt_free_table_info(oldinfo); |
3bc3fe5e PM |
1239 | if (copy_to_user(counters_ptr, counters, |
1240 | sizeof(struct xt_counters) * num_counters) != 0) | |
1da177e4 LT |
1241 | ret = -EFAULT; |
1242 | vfree(counters); | |
2e4e6a17 | 1243 | xt_table_unlock(t); |
1da177e4 LT |
1244 | return ret; |
1245 | ||
1246 | put_module: | |
1247 | module_put(t->me); | |
2e4e6a17 | 1248 | xt_table_unlock(t); |
1da177e4 | 1249 | free_newinfo_counters_untrans: |
1da177e4 | 1250 | vfree(counters); |
3bc3fe5e PM |
1251 | out: |
1252 | return ret; | |
1253 | } | |
1254 | ||
1255 | static int | |
d5d1baa1 | 1256 | do_replace(struct net *net, const void __user *user, unsigned int len) |
3bc3fe5e PM |
1257 | { |
1258 | int ret; | |
1259 | struct ip6t_replace tmp; | |
1260 | struct xt_table_info *newinfo; | |
1261 | void *loc_cpu_entry; | |
72b2b1dd | 1262 | struct ip6t_entry *iter; |
3bc3fe5e PM |
1263 | |
1264 | if (copy_from_user(&tmp, user, sizeof(tmp)) != 0) | |
1265 | return -EFAULT; | |
1266 | ||
1267 | /* overflow check */ | |
1268 | if (tmp.num_counters >= INT_MAX / sizeof(struct xt_counters)) | |
1269 | return -ENOMEM; | |
6a8ab060 | 1270 | tmp.name[sizeof(tmp.name)-1] = 0; |
3bc3fe5e PM |
1271 | |
1272 | newinfo = xt_alloc_table_info(tmp.size); | |
1273 | if (!newinfo) | |
1274 | return -ENOMEM; | |
1275 | ||
1276 | /* choose the copy that is on our node/cpu */ | |
1277 | loc_cpu_entry = newinfo->entries[raw_smp_processor_id()]; | |
1278 | if (copy_from_user(loc_cpu_entry, user + sizeof(tmp), | |
1279 | tmp.size) != 0) { | |
1280 | ret = -EFAULT; | |
1281 | goto free_newinfo; | |
1282 | } | |
1283 | ||
0f234214 | 1284 | ret = translate_table(net, newinfo, loc_cpu_entry, &tmp); |
3bc3fe5e PM |
1285 | if (ret != 0) |
1286 | goto free_newinfo; | |
1287 | ||
1288 | duprintf("ip_tables: Translated table\n"); | |
1289 | ||
336b517f | 1290 | ret = __do_replace(net, tmp.name, tmp.valid_hooks, newinfo, |
3bc3fe5e PM |
1291 | tmp.num_counters, tmp.counters); |
1292 | if (ret) | |
1293 | goto free_newinfo_untrans; | |
1294 | return 0; | |
1295 | ||
1296 | free_newinfo_untrans: | |
72b2b1dd | 1297 | xt_entry_foreach(iter, loc_cpu_entry, newinfo->size) |
0559518b | 1298 | cleanup_entry(iter, net); |
1da177e4 | 1299 | free_newinfo: |
2e4e6a17 | 1300 | xt_free_table_info(newinfo); |
1da177e4 LT |
1301 | return ret; |
1302 | } | |
1303 | ||
1da177e4 | 1304 | static int |
d5d1baa1 | 1305 | do_add_counters(struct net *net, const void __user *user, unsigned int len, |
336b517f | 1306 | int compat) |
1da177e4 | 1307 | { |
942e4a2b | 1308 | unsigned int i, curcpu; |
3bc3fe5e PM |
1309 | struct xt_counters_info tmp; |
1310 | struct xt_counters *paddc; | |
1311 | unsigned int num_counters; | |
1312 | char *name; | |
1313 | int size; | |
1314 | void *ptmp; | |
2e4e6a17 | 1315 | struct xt_table *t; |
5452e425 | 1316 | const struct xt_table_info *private; |
6b7d31fc | 1317 | int ret = 0; |
5452e425 | 1318 | const void *loc_cpu_entry; |
72b2b1dd | 1319 | struct ip6t_entry *iter; |
7f5c6d4f | 1320 | unsigned int addend; |
3bc3fe5e PM |
1321 | #ifdef CONFIG_COMPAT |
1322 | struct compat_xt_counters_info compat_tmp; | |
1da177e4 | 1323 | |
3bc3fe5e PM |
1324 | if (compat) { |
1325 | ptmp = &compat_tmp; | |
1326 | size = sizeof(struct compat_xt_counters_info); | |
1327 | } else | |
1328 | #endif | |
1329 | { | |
1330 | ptmp = &tmp; | |
1331 | size = sizeof(struct xt_counters_info); | |
1332 | } | |
1333 | ||
1334 | if (copy_from_user(ptmp, user, size) != 0) | |
1da177e4 LT |
1335 | return -EFAULT; |
1336 | ||
3bc3fe5e PM |
1337 | #ifdef CONFIG_COMPAT |
1338 | if (compat) { | |
1339 | num_counters = compat_tmp.num_counters; | |
1340 | name = compat_tmp.name; | |
1341 | } else | |
1342 | #endif | |
1343 | { | |
1344 | num_counters = tmp.num_counters; | |
1345 | name = tmp.name; | |
1346 | } | |
1347 | ||
1348 | if (len != size + num_counters * sizeof(struct xt_counters)) | |
1da177e4 LT |
1349 | return -EINVAL; |
1350 | ||
e12f8e29 | 1351 | paddc = vmalloc(len - size); |
1da177e4 LT |
1352 | if (!paddc) |
1353 | return -ENOMEM; | |
1354 | ||
3bc3fe5e | 1355 | if (copy_from_user(paddc, user + size, len - size) != 0) { |
1da177e4 LT |
1356 | ret = -EFAULT; |
1357 | goto free; | |
1358 | } | |
1359 | ||
336b517f | 1360 | t = xt_find_table_lock(net, AF_INET6, name); |
6b7d31fc HW |
1361 | if (!t || IS_ERR(t)) { |
1362 | ret = t ? PTR_ERR(t) : -ENOENT; | |
1da177e4 | 1363 | goto free; |
6b7d31fc | 1364 | } |
1da177e4 | 1365 | |
942e4a2b SH |
1366 | |
1367 | local_bh_disable(); | |
2e4e6a17 | 1368 | private = t->private; |
3bc3fe5e | 1369 | if (private->number != num_counters) { |
1da177e4 LT |
1370 | ret = -EINVAL; |
1371 | goto unlock_up_free; | |
1372 | } | |
1373 | ||
1374 | i = 0; | |
31836064 | 1375 | /* Choose the copy that is on our node */ |
942e4a2b | 1376 | curcpu = smp_processor_id(); |
7f5c6d4f | 1377 | addend = xt_write_recseq_begin(); |
942e4a2b | 1378 | loc_cpu_entry = private->entries[curcpu]; |
0559518b JE |
1379 | xt_entry_foreach(iter, loc_cpu_entry, private->size) { |
1380 | ADD_COUNTER(iter->counters, paddc[i].bcnt, paddc[i].pcnt); | |
1381 | ++i; | |
1382 | } | |
7f5c6d4f | 1383 | xt_write_recseq_end(addend); |
942e4a2b | 1384 | |
1da177e4 | 1385 | unlock_up_free: |
942e4a2b | 1386 | local_bh_enable(); |
2e4e6a17 | 1387 | xt_table_unlock(t); |
6b7d31fc | 1388 | module_put(t->me); |
1da177e4 LT |
1389 | free: |
1390 | vfree(paddc); | |
1391 | ||
1392 | return ret; | |
1393 | } | |
1394 | ||
3bc3fe5e PM |
1395 | #ifdef CONFIG_COMPAT |
1396 | struct compat_ip6t_replace { | |
12b00c2c | 1397 | char name[XT_TABLE_MAXNAMELEN]; |
3bc3fe5e PM |
1398 | u32 valid_hooks; |
1399 | u32 num_entries; | |
1400 | u32 size; | |
1401 | u32 hook_entry[NF_INET_NUMHOOKS]; | |
1402 | u32 underflow[NF_INET_NUMHOOKS]; | |
1403 | u32 num_counters; | |
87a2e70d | 1404 | compat_uptr_t counters; /* struct xt_counters * */ |
3bc3fe5e PM |
1405 | struct compat_ip6t_entry entries[0]; |
1406 | }; | |
1407 | ||
1408 | static int | |
1409 | compat_copy_entry_to_user(struct ip6t_entry *e, void __user **dstptr, | |
b0a6363c | 1410 | unsigned int *size, struct xt_counters *counters, |
0559518b | 1411 | unsigned int i) |
3bc3fe5e | 1412 | { |
87a2e70d | 1413 | struct xt_entry_target *t; |
3bc3fe5e PM |
1414 | struct compat_ip6t_entry __user *ce; |
1415 | u_int16_t target_offset, next_offset; | |
1416 | compat_uint_t origsize; | |
dcea992a JE |
1417 | const struct xt_entry_match *ematch; |
1418 | int ret = 0; | |
3bc3fe5e | 1419 | |
3bc3fe5e PM |
1420 | origsize = *size; |
1421 | ce = (struct compat_ip6t_entry __user *)*dstptr; | |
0559518b JE |
1422 | if (copy_to_user(ce, e, sizeof(struct ip6t_entry)) != 0 || |
1423 | copy_to_user(&ce->counters, &counters[i], | |
1424 | sizeof(counters[i])) != 0) | |
1425 | return -EFAULT; | |
3bc3fe5e PM |
1426 | |
1427 | *dstptr += sizeof(struct compat_ip6t_entry); | |
1428 | *size -= sizeof(struct ip6t_entry) - sizeof(struct compat_ip6t_entry); | |
1429 | ||
dcea992a JE |
1430 | xt_ematch_foreach(ematch, e) { |
1431 | ret = xt_compat_match_to_user(ematch, dstptr, size); | |
1432 | if (ret != 0) | |
6bdb331b | 1433 | return ret; |
dcea992a | 1434 | } |
3bc3fe5e | 1435 | target_offset = e->target_offset - (origsize - *size); |
3bc3fe5e PM |
1436 | t = ip6t_get_target(e); |
1437 | ret = xt_compat_target_to_user(t, dstptr, size); | |
1438 | if (ret) | |
0559518b | 1439 | return ret; |
3bc3fe5e | 1440 | next_offset = e->next_offset - (origsize - *size); |
0559518b JE |
1441 | if (put_user(target_offset, &ce->target_offset) != 0 || |
1442 | put_user(next_offset, &ce->next_offset) != 0) | |
1443 | return -EFAULT; | |
3bc3fe5e | 1444 | return 0; |
3bc3fe5e PM |
1445 | } |
1446 | ||
022748a9 | 1447 | static int |
87a2e70d | 1448 | compat_find_calc_match(struct xt_entry_match *m, |
3bc3fe5e PM |
1449 | const char *name, |
1450 | const struct ip6t_ip6 *ipv6, | |
1451 | unsigned int hookmask, | |
6bdb331b | 1452 | int *size) |
3bc3fe5e PM |
1453 | { |
1454 | struct xt_match *match; | |
1455 | ||
fd0ec0e6 JE |
1456 | match = xt_request_find_match(NFPROTO_IPV6, m->u.user.name, |
1457 | m->u.user.revision); | |
1458 | if (IS_ERR(match)) { | |
3bc3fe5e PM |
1459 | duprintf("compat_check_calc_match: `%s' not found\n", |
1460 | m->u.user.name); | |
fd0ec0e6 | 1461 | return PTR_ERR(match); |
3bc3fe5e PM |
1462 | } |
1463 | m->u.kernel.match = match; | |
1464 | *size += xt_compat_match_offset(match); | |
3bc3fe5e PM |
1465 | return 0; |
1466 | } | |
1467 | ||
0559518b | 1468 | static void compat_release_entry(struct compat_ip6t_entry *e) |
3bc3fe5e | 1469 | { |
87a2e70d | 1470 | struct xt_entry_target *t; |
dcea992a | 1471 | struct xt_entry_match *ematch; |
3bc3fe5e | 1472 | |
3bc3fe5e | 1473 | /* Cleanup all matches */ |
dcea992a | 1474 | xt_ematch_foreach(ematch, e) |
6bdb331b | 1475 | module_put(ematch->u.kernel.match->me); |
3bc3fe5e PM |
1476 | t = compat_ip6t_get_target(e); |
1477 | module_put(t->u.kernel.target->me); | |
3bc3fe5e PM |
1478 | } |
1479 | ||
022748a9 | 1480 | static int |
3bc3fe5e PM |
1481 | check_compat_entry_size_and_hooks(struct compat_ip6t_entry *e, |
1482 | struct xt_table_info *newinfo, | |
1483 | unsigned int *size, | |
d5d1baa1 JE |
1484 | const unsigned char *base, |
1485 | const unsigned char *limit, | |
1486 | const unsigned int *hook_entries, | |
1487 | const unsigned int *underflows, | |
3bc3fe5e PM |
1488 | const char *name) |
1489 | { | |
dcea992a | 1490 | struct xt_entry_match *ematch; |
87a2e70d | 1491 | struct xt_entry_target *t; |
3bc3fe5e PM |
1492 | struct xt_target *target; |
1493 | unsigned int entry_offset; | |
b0a6363c PM |
1494 | unsigned int j; |
1495 | int ret, off, h; | |
3bc3fe5e PM |
1496 | |
1497 | duprintf("check_compat_entry_size_and_hooks %p\n", e); | |
3666ed1c JP |
1498 | if ((unsigned long)e % __alignof__(struct compat_ip6t_entry) != 0 || |
1499 | (unsigned char *)e + sizeof(struct compat_ip6t_entry) >= limit) { | |
3bc3fe5e PM |
1500 | duprintf("Bad offset %p, limit = %p\n", e, limit); |
1501 | return -EINVAL; | |
1502 | } | |
1503 | ||
1504 | if (e->next_offset < sizeof(struct compat_ip6t_entry) + | |
1505 | sizeof(struct compat_xt_entry_target)) { | |
1506 | duprintf("checking: element %p size %u\n", | |
1507 | e, e->next_offset); | |
1508 | return -EINVAL; | |
1509 | } | |
1510 | ||
1511 | /* For purposes of check_entry casting the compat entry is fine */ | |
1512 | ret = check_entry((struct ip6t_entry *)e, name); | |
1513 | if (ret) | |
1514 | return ret; | |
1515 | ||
1516 | off = sizeof(struct ip6t_entry) - sizeof(struct compat_ip6t_entry); | |
1517 | entry_offset = (void *)e - (void *)base; | |
1518 | j = 0; | |
dcea992a JE |
1519 | xt_ematch_foreach(ematch, e) { |
1520 | ret = compat_find_calc_match(ematch, name, | |
6b4ff2d7 | 1521 | &e->ipv6, e->comefrom, &off); |
dcea992a | 1522 | if (ret != 0) |
6bdb331b JE |
1523 | goto release_matches; |
1524 | ++j; | |
dcea992a | 1525 | } |
3bc3fe5e PM |
1526 | |
1527 | t = compat_ip6t_get_target(e); | |
d2a7b6ba JE |
1528 | target = xt_request_find_target(NFPROTO_IPV6, t->u.user.name, |
1529 | t->u.user.revision); | |
1530 | if (IS_ERR(target)) { | |
3bc3fe5e PM |
1531 | duprintf("check_compat_entry_size_and_hooks: `%s' not found\n", |
1532 | t->u.user.name); | |
d2a7b6ba | 1533 | ret = PTR_ERR(target); |
3bc3fe5e PM |
1534 | goto release_matches; |
1535 | } | |
1536 | t->u.kernel.target = target; | |
1537 | ||
1538 | off += xt_compat_target_offset(target); | |
1539 | *size += off; | |
1540 | ret = xt_compat_add_offset(AF_INET6, entry_offset, off); | |
1541 | if (ret) | |
1542 | goto out; | |
1543 | ||
1544 | /* Check hooks & underflows */ | |
1545 | for (h = 0; h < NF_INET_NUMHOOKS; h++) { | |
1546 | if ((unsigned char *)e - base == hook_entries[h]) | |
1547 | newinfo->hook_entry[h] = hook_entries[h]; | |
1548 | if ((unsigned char *)e - base == underflows[h]) | |
1549 | newinfo->underflow[h] = underflows[h]; | |
1550 | } | |
1551 | ||
1552 | /* Clear counters and comefrom */ | |
1553 | memset(&e->counters, 0, sizeof(e->counters)); | |
1554 | e->comefrom = 0; | |
3bc3fe5e PM |
1555 | return 0; |
1556 | ||
1557 | out: | |
1558 | module_put(t->u.kernel.target->me); | |
1559 | release_matches: | |
6bdb331b JE |
1560 | xt_ematch_foreach(ematch, e) { |
1561 | if (j-- == 0) | |
dcea992a | 1562 | break; |
6bdb331b JE |
1563 | module_put(ematch->u.kernel.match->me); |
1564 | } | |
3bc3fe5e PM |
1565 | return ret; |
1566 | } | |
1567 | ||
1568 | static int | |
1569 | compat_copy_entry_from_user(struct compat_ip6t_entry *e, void **dstptr, | |
1570 | unsigned int *size, const char *name, | |
1571 | struct xt_table_info *newinfo, unsigned char *base) | |
1572 | { | |
87a2e70d | 1573 | struct xt_entry_target *t; |
3bc3fe5e PM |
1574 | struct ip6t_entry *de; |
1575 | unsigned int origsize; | |
1576 | int ret, h; | |
dcea992a | 1577 | struct xt_entry_match *ematch; |
3bc3fe5e PM |
1578 | |
1579 | ret = 0; | |
1580 | origsize = *size; | |
1581 | de = (struct ip6t_entry *)*dstptr; | |
1582 | memcpy(de, e, sizeof(struct ip6t_entry)); | |
1583 | memcpy(&de->counters, &e->counters, sizeof(e->counters)); | |
1584 | ||
1585 | *dstptr += sizeof(struct ip6t_entry); | |
1586 | *size += sizeof(struct ip6t_entry) - sizeof(struct compat_ip6t_entry); | |
1587 | ||
dcea992a JE |
1588 | xt_ematch_foreach(ematch, e) { |
1589 | ret = xt_compat_match_from_user(ematch, dstptr, size); | |
1590 | if (ret != 0) | |
6bdb331b | 1591 | return ret; |
dcea992a | 1592 | } |
3bc3fe5e PM |
1593 | de->target_offset = e->target_offset - (origsize - *size); |
1594 | t = compat_ip6t_get_target(e); | |
3bc3fe5e PM |
1595 | xt_compat_target_from_user(t, dstptr, size); |
1596 | ||
1597 | de->next_offset = e->next_offset - (origsize - *size); | |
1598 | for (h = 0; h < NF_INET_NUMHOOKS; h++) { | |
1599 | if ((unsigned char *)de - base < newinfo->hook_entry[h]) | |
1600 | newinfo->hook_entry[h] -= origsize - *size; | |
1601 | if ((unsigned char *)de - base < newinfo->underflow[h]) | |
1602 | newinfo->underflow[h] -= origsize - *size; | |
1603 | } | |
1604 | return ret; | |
1605 | } | |
1606 | ||
f54e9367 | 1607 | static int compat_check_entry(struct ip6t_entry *e, struct net *net, |
0559518b | 1608 | const char *name) |
3bc3fe5e | 1609 | { |
b0a6363c | 1610 | unsigned int j; |
dcea992a | 1611 | int ret = 0; |
9b4fce7a | 1612 | struct xt_mtchk_param mtpar; |
dcea992a | 1613 | struct xt_entry_match *ematch; |
3bc3fe5e PM |
1614 | |
1615 | j = 0; | |
f54e9367 | 1616 | mtpar.net = net; |
9b4fce7a JE |
1617 | mtpar.table = name; |
1618 | mtpar.entryinfo = &e->ipv6; | |
1619 | mtpar.hook_mask = e->comefrom; | |
916a917d | 1620 | mtpar.family = NFPROTO_IPV6; |
dcea992a | 1621 | xt_ematch_foreach(ematch, e) { |
6bdb331b | 1622 | ret = check_match(ematch, &mtpar); |
dcea992a | 1623 | if (ret != 0) |
6bdb331b JE |
1624 | goto cleanup_matches; |
1625 | ++j; | |
dcea992a | 1626 | } |
3bc3fe5e | 1627 | |
add67461 | 1628 | ret = check_target(e, net, name); |
3bc3fe5e PM |
1629 | if (ret) |
1630 | goto cleanup_matches; | |
3bc3fe5e PM |
1631 | return 0; |
1632 | ||
1633 | cleanup_matches: | |
6bdb331b JE |
1634 | xt_ematch_foreach(ematch, e) { |
1635 | if (j-- == 0) | |
dcea992a | 1636 | break; |
6bdb331b JE |
1637 | cleanup_match(ematch, net); |
1638 | } | |
3bc3fe5e PM |
1639 | return ret; |
1640 | } | |
1641 | ||
1642 | static int | |
f54e9367 AD |
1643 | translate_compat_table(struct net *net, |
1644 | const char *name, | |
3bc3fe5e PM |
1645 | unsigned int valid_hooks, |
1646 | struct xt_table_info **pinfo, | |
1647 | void **pentry0, | |
1648 | unsigned int total_size, | |
1649 | unsigned int number, | |
1650 | unsigned int *hook_entries, | |
1651 | unsigned int *underflows) | |
1652 | { | |
1653 | unsigned int i, j; | |
1654 | struct xt_table_info *newinfo, *info; | |
1655 | void *pos, *entry0, *entry1; | |
72b2b1dd JE |
1656 | struct compat_ip6t_entry *iter0; |
1657 | struct ip6t_entry *iter1; | |
3bc3fe5e | 1658 | unsigned int size; |
72b2b1dd | 1659 | int ret = 0; |
3bc3fe5e PM |
1660 | |
1661 | info = *pinfo; | |
1662 | entry0 = *pentry0; | |
1663 | size = total_size; | |
1664 | info->number = number; | |
1665 | ||
1666 | /* Init all hooks to impossible value. */ | |
1667 | for (i = 0; i < NF_INET_NUMHOOKS; i++) { | |
1668 | info->hook_entry[i] = 0xFFFFFFFF; | |
1669 | info->underflow[i] = 0xFFFFFFFF; | |
1670 | } | |
1671 | ||
1672 | duprintf("translate_compat_table: size %u\n", info->size); | |
1673 | j = 0; | |
1674 | xt_compat_lock(AF_INET6); | |
255d0dc3 | 1675 | xt_compat_init_offsets(AF_INET6, number); |
3bc3fe5e | 1676 | /* Walk through entries, checking offsets. */ |
72b2b1dd JE |
1677 | xt_entry_foreach(iter0, entry0, total_size) { |
1678 | ret = check_compat_entry_size_and_hooks(iter0, info, &size, | |
6b4ff2d7 JE |
1679 | entry0, |
1680 | entry0 + total_size, | |
1681 | hook_entries, | |
1682 | underflows, | |
1683 | name); | |
72b2b1dd | 1684 | if (ret != 0) |
0559518b JE |
1685 | goto out_unlock; |
1686 | ++j; | |
72b2b1dd | 1687 | } |
3bc3fe5e PM |
1688 | |
1689 | ret = -EINVAL; | |
1690 | if (j != number) { | |
1691 | duprintf("translate_compat_table: %u not %u entries\n", | |
1692 | j, number); | |
1693 | goto out_unlock; | |
1694 | } | |
1695 | ||
1696 | /* Check hooks all assigned */ | |
1697 | for (i = 0; i < NF_INET_NUMHOOKS; i++) { | |
1698 | /* Only hooks which are valid */ | |
1699 | if (!(valid_hooks & (1 << i))) | |
1700 | continue; | |
1701 | if (info->hook_entry[i] == 0xFFFFFFFF) { | |
1702 | duprintf("Invalid hook entry %u %u\n", | |
1703 | i, hook_entries[i]); | |
1704 | goto out_unlock; | |
1705 | } | |
1706 | if (info->underflow[i] == 0xFFFFFFFF) { | |
1707 | duprintf("Invalid underflow %u %u\n", | |
1708 | i, underflows[i]); | |
1709 | goto out_unlock; | |
1710 | } | |
1711 | } | |
1712 | ||
1713 | ret = -ENOMEM; | |
1714 | newinfo = xt_alloc_table_info(size); | |
1715 | if (!newinfo) | |
1716 | goto out_unlock; | |
1717 | ||
1718 | newinfo->number = number; | |
1719 | for (i = 0; i < NF_INET_NUMHOOKS; i++) { | |
1720 | newinfo->hook_entry[i] = info->hook_entry[i]; | |
1721 | newinfo->underflow[i] = info->underflow[i]; | |
1722 | } | |
1723 | entry1 = newinfo->entries[raw_smp_processor_id()]; | |
1724 | pos = entry1; | |
1725 | size = total_size; | |
72b2b1dd | 1726 | xt_entry_foreach(iter0, entry0, total_size) { |
6b4ff2d7 JE |
1727 | ret = compat_copy_entry_from_user(iter0, &pos, &size, |
1728 | name, newinfo, entry1); | |
72b2b1dd JE |
1729 | if (ret != 0) |
1730 | break; | |
1731 | } | |
3bc3fe5e PM |
1732 | xt_compat_flush_offsets(AF_INET6); |
1733 | xt_compat_unlock(AF_INET6); | |
1734 | if (ret) | |
1735 | goto free_newinfo; | |
1736 | ||
1737 | ret = -ELOOP; | |
1738 | if (!mark_source_chains(newinfo, valid_hooks, entry1)) | |
1739 | goto free_newinfo; | |
1740 | ||
1741 | i = 0; | |
72b2b1dd | 1742 | xt_entry_foreach(iter1, entry1, newinfo->size) { |
0559518b | 1743 | ret = compat_check_entry(iter1, net, name); |
72b2b1dd JE |
1744 | if (ret != 0) |
1745 | break; | |
0559518b | 1746 | ++i; |
cca77b7c FW |
1747 | if (strcmp(ip6t_get_target(iter1)->u.user.name, |
1748 | XT_ERROR_TARGET) == 0) | |
1749 | ++newinfo->stacksize; | |
72b2b1dd | 1750 | } |
3bc3fe5e | 1751 | if (ret) { |
72b2b1dd JE |
1752 | /* |
1753 | * The first i matches need cleanup_entry (calls ->destroy) | |
1754 | * because they had called ->check already. The other j-i | |
1755 | * entries need only release. | |
1756 | */ | |
1757 | int skip = i; | |
3bc3fe5e | 1758 | j -= i; |
72b2b1dd JE |
1759 | xt_entry_foreach(iter0, entry0, newinfo->size) { |
1760 | if (skip-- > 0) | |
1761 | continue; | |
0559518b | 1762 | if (j-- == 0) |
72b2b1dd | 1763 | break; |
0559518b | 1764 | compat_release_entry(iter0); |
72b2b1dd | 1765 | } |
0559518b JE |
1766 | xt_entry_foreach(iter1, entry1, newinfo->size) { |
1767 | if (i-- == 0) | |
72b2b1dd | 1768 | break; |
0559518b JE |
1769 | cleanup_entry(iter1, net); |
1770 | } | |
3bc3fe5e PM |
1771 | xt_free_table_info(newinfo); |
1772 | return ret; | |
1773 | } | |
1774 | ||
1775 | /* And one copy for every other CPU */ | |
1776 | for_each_possible_cpu(i) | |
1777 | if (newinfo->entries[i] && newinfo->entries[i] != entry1) | |
1778 | memcpy(newinfo->entries[i], entry1, newinfo->size); | |
1779 | ||
1780 | *pinfo = newinfo; | |
1781 | *pentry0 = entry1; | |
1782 | xt_free_table_info(info); | |
1783 | return 0; | |
1784 | ||
1785 | free_newinfo: | |
1786 | xt_free_table_info(newinfo); | |
1787 | out: | |
0559518b JE |
1788 | xt_entry_foreach(iter0, entry0, total_size) { |
1789 | if (j-- == 0) | |
72b2b1dd | 1790 | break; |
0559518b JE |
1791 | compat_release_entry(iter0); |
1792 | } | |
3bc3fe5e PM |
1793 | return ret; |
1794 | out_unlock: | |
1795 | xt_compat_flush_offsets(AF_INET6); | |
1796 | xt_compat_unlock(AF_INET6); | |
1797 | goto out; | |
1798 | } | |
1799 | ||
1800 | static int | |
336b517f | 1801 | compat_do_replace(struct net *net, void __user *user, unsigned int len) |
3bc3fe5e PM |
1802 | { |
1803 | int ret; | |
1804 | struct compat_ip6t_replace tmp; | |
1805 | struct xt_table_info *newinfo; | |
1806 | void *loc_cpu_entry; | |
72b2b1dd | 1807 | struct ip6t_entry *iter; |
3bc3fe5e PM |
1808 | |
1809 | if (copy_from_user(&tmp, user, sizeof(tmp)) != 0) | |
1810 | return -EFAULT; | |
1811 | ||
1812 | /* overflow check */ | |
1813 | if (tmp.size >= INT_MAX / num_possible_cpus()) | |
1814 | return -ENOMEM; | |
1815 | if (tmp.num_counters >= INT_MAX / sizeof(struct xt_counters)) | |
1816 | return -ENOMEM; | |
6a8ab060 | 1817 | tmp.name[sizeof(tmp.name)-1] = 0; |
3bc3fe5e PM |
1818 | |
1819 | newinfo = xt_alloc_table_info(tmp.size); | |
1820 | if (!newinfo) | |
1821 | return -ENOMEM; | |
1822 | ||
9c547959 | 1823 | /* choose the copy that is on our node/cpu */ |
3bc3fe5e PM |
1824 | loc_cpu_entry = newinfo->entries[raw_smp_processor_id()]; |
1825 | if (copy_from_user(loc_cpu_entry, user + sizeof(tmp), | |
1826 | tmp.size) != 0) { | |
1827 | ret = -EFAULT; | |
1828 | goto free_newinfo; | |
1829 | } | |
1830 | ||
f54e9367 | 1831 | ret = translate_compat_table(net, tmp.name, tmp.valid_hooks, |
3bc3fe5e PM |
1832 | &newinfo, &loc_cpu_entry, tmp.size, |
1833 | tmp.num_entries, tmp.hook_entry, | |
1834 | tmp.underflow); | |
1835 | if (ret != 0) | |
1836 | goto free_newinfo; | |
1837 | ||
1838 | duprintf("compat_do_replace: Translated table\n"); | |
1839 | ||
336b517f | 1840 | ret = __do_replace(net, tmp.name, tmp.valid_hooks, newinfo, |
3bc3fe5e PM |
1841 | tmp.num_counters, compat_ptr(tmp.counters)); |
1842 | if (ret) | |
1843 | goto free_newinfo_untrans; | |
1844 | return 0; | |
1845 | ||
1846 | free_newinfo_untrans: | |
72b2b1dd | 1847 | xt_entry_foreach(iter, loc_cpu_entry, newinfo->size) |
0559518b | 1848 | cleanup_entry(iter, net); |
3bc3fe5e PM |
1849 | free_newinfo: |
1850 | xt_free_table_info(newinfo); | |
1851 | return ret; | |
1852 | } | |
1853 | ||
1854 | static int | |
1855 | compat_do_ip6t_set_ctl(struct sock *sk, int cmd, void __user *user, | |
1856 | unsigned int len) | |
1857 | { | |
1858 | int ret; | |
1859 | ||
1860 | if (!capable(CAP_NET_ADMIN)) | |
1861 | return -EPERM; | |
1862 | ||
1863 | switch (cmd) { | |
1864 | case IP6T_SO_SET_REPLACE: | |
3b1e0a65 | 1865 | ret = compat_do_replace(sock_net(sk), user, len); |
3bc3fe5e PM |
1866 | break; |
1867 | ||
1868 | case IP6T_SO_SET_ADD_COUNTERS: | |
3b1e0a65 | 1869 | ret = do_add_counters(sock_net(sk), user, len, 1); |
3bc3fe5e PM |
1870 | break; |
1871 | ||
1872 | default: | |
1873 | duprintf("do_ip6t_set_ctl: unknown request %i\n", cmd); | |
1874 | ret = -EINVAL; | |
1875 | } | |
1876 | ||
1877 | return ret; | |
1878 | } | |
1879 | ||
1880 | struct compat_ip6t_get_entries { | |
12b00c2c | 1881 | char name[XT_TABLE_MAXNAMELEN]; |
3bc3fe5e PM |
1882 | compat_uint_t size; |
1883 | struct compat_ip6t_entry entrytable[0]; | |
1884 | }; | |
1885 | ||
1886 | static int | |
1887 | compat_copy_entries_to_user(unsigned int total_size, struct xt_table *table, | |
1888 | void __user *userptr) | |
1889 | { | |
1890 | struct xt_counters *counters; | |
5452e425 | 1891 | const struct xt_table_info *private = table->private; |
3bc3fe5e PM |
1892 | void __user *pos; |
1893 | unsigned int size; | |
1894 | int ret = 0; | |
5452e425 | 1895 | const void *loc_cpu_entry; |
3bc3fe5e | 1896 | unsigned int i = 0; |
72b2b1dd | 1897 | struct ip6t_entry *iter; |
3bc3fe5e PM |
1898 | |
1899 | counters = alloc_counters(table); | |
1900 | if (IS_ERR(counters)) | |
1901 | return PTR_ERR(counters); | |
1902 | ||
1903 | /* choose the copy that is on our node/cpu, ... | |
1904 | * This choice is lazy (because current thread is | |
1905 | * allowed to migrate to another cpu) | |
1906 | */ | |
1907 | loc_cpu_entry = private->entries[raw_smp_processor_id()]; | |
1908 | pos = userptr; | |
1909 | size = total_size; | |
72b2b1dd JE |
1910 | xt_entry_foreach(iter, loc_cpu_entry, total_size) { |
1911 | ret = compat_copy_entry_to_user(iter, &pos, | |
6b4ff2d7 | 1912 | &size, counters, i++); |
72b2b1dd JE |
1913 | if (ret != 0) |
1914 | break; | |
1915 | } | |
3bc3fe5e PM |
1916 | |
1917 | vfree(counters); | |
1918 | return ret; | |
1919 | } | |
1920 | ||
1921 | static int | |
336b517f AD |
1922 | compat_get_entries(struct net *net, struct compat_ip6t_get_entries __user *uptr, |
1923 | int *len) | |
3bc3fe5e PM |
1924 | { |
1925 | int ret; | |
1926 | struct compat_ip6t_get_entries get; | |
1927 | struct xt_table *t; | |
1928 | ||
1929 | if (*len < sizeof(get)) { | |
c9d8fe13 | 1930 | duprintf("compat_get_entries: %u < %zu\n", *len, sizeof(get)); |
3bc3fe5e PM |
1931 | return -EINVAL; |
1932 | } | |
1933 | ||
1934 | if (copy_from_user(&get, uptr, sizeof(get)) != 0) | |
1935 | return -EFAULT; | |
1936 | ||
1937 | if (*len != sizeof(struct compat_ip6t_get_entries) + get.size) { | |
c9d8fe13 PM |
1938 | duprintf("compat_get_entries: %u != %zu\n", |
1939 | *len, sizeof(get) + get.size); | |
3bc3fe5e PM |
1940 | return -EINVAL; |
1941 | } | |
1942 | ||
1943 | xt_compat_lock(AF_INET6); | |
336b517f | 1944 | t = xt_find_table_lock(net, AF_INET6, get.name); |
3bc3fe5e | 1945 | if (t && !IS_ERR(t)) { |
5452e425 | 1946 | const struct xt_table_info *private = t->private; |
3bc3fe5e | 1947 | struct xt_table_info info; |
9c547959 | 1948 | duprintf("t->private->number = %u\n", private->number); |
3bc3fe5e PM |
1949 | ret = compat_table_info(private, &info); |
1950 | if (!ret && get.size == info.size) { | |
1951 | ret = compat_copy_entries_to_user(private->size, | |
1952 | t, uptr->entrytable); | |
1953 | } else if (!ret) { | |
1954 | duprintf("compat_get_entries: I've got %u not %u!\n", | |
9c547959 | 1955 | private->size, get.size); |
544473c1 | 1956 | ret = -EAGAIN; |
3bc3fe5e PM |
1957 | } |
1958 | xt_compat_flush_offsets(AF_INET6); | |
1959 | module_put(t->me); | |
1960 | xt_table_unlock(t); | |
1961 | } else | |
1962 | ret = t ? PTR_ERR(t) : -ENOENT; | |
1963 | ||
1964 | xt_compat_unlock(AF_INET6); | |
1965 | return ret; | |
1966 | } | |
1967 | ||
1968 | static int do_ip6t_get_ctl(struct sock *, int, void __user *, int *); | |
1969 | ||
1970 | static int | |
1971 | compat_do_ip6t_get_ctl(struct sock *sk, int cmd, void __user *user, int *len) | |
1972 | { | |
1973 | int ret; | |
1974 | ||
1975 | if (!capable(CAP_NET_ADMIN)) | |
1976 | return -EPERM; | |
1977 | ||
1978 | switch (cmd) { | |
1979 | case IP6T_SO_GET_INFO: | |
3b1e0a65 | 1980 | ret = get_info(sock_net(sk), user, len, 1); |
3bc3fe5e PM |
1981 | break; |
1982 | case IP6T_SO_GET_ENTRIES: | |
3b1e0a65 | 1983 | ret = compat_get_entries(sock_net(sk), user, len); |
3bc3fe5e PM |
1984 | break; |
1985 | default: | |
1986 | ret = do_ip6t_get_ctl(sk, cmd, user, len); | |
1987 | } | |
1988 | return ret; | |
1989 | } | |
1990 | #endif | |
1991 | ||
1da177e4 LT |
1992 | static int |
1993 | do_ip6t_set_ctl(struct sock *sk, int cmd, void __user *user, unsigned int len) | |
1994 | { | |
1995 | int ret; | |
1996 | ||
1997 | if (!capable(CAP_NET_ADMIN)) | |
1998 | return -EPERM; | |
1999 | ||
2000 | switch (cmd) { | |
2001 | case IP6T_SO_SET_REPLACE: | |
3b1e0a65 | 2002 | ret = do_replace(sock_net(sk), user, len); |
1da177e4 LT |
2003 | break; |
2004 | ||
2005 | case IP6T_SO_SET_ADD_COUNTERS: | |
3b1e0a65 | 2006 | ret = do_add_counters(sock_net(sk), user, len, 0); |
1da177e4 LT |
2007 | break; |
2008 | ||
2009 | default: | |
2010 | duprintf("do_ip6t_set_ctl: unknown request %i\n", cmd); | |
2011 | ret = -EINVAL; | |
2012 | } | |
2013 | ||
2014 | return ret; | |
2015 | } | |
2016 | ||
2017 | static int | |
2018 | do_ip6t_get_ctl(struct sock *sk, int cmd, void __user *user, int *len) | |
2019 | { | |
2020 | int ret; | |
2021 | ||
2022 | if (!capable(CAP_NET_ADMIN)) | |
2023 | return -EPERM; | |
2024 | ||
2025 | switch (cmd) { | |
433665c9 | 2026 | case IP6T_SO_GET_INFO: |
3b1e0a65 | 2027 | ret = get_info(sock_net(sk), user, len, 0); |
433665c9 | 2028 | break; |
1da177e4 | 2029 | |
d924357c | 2030 | case IP6T_SO_GET_ENTRIES: |
3b1e0a65 | 2031 | ret = get_entries(sock_net(sk), user, len); |
1da177e4 | 2032 | break; |
1da177e4 | 2033 | |
6b7d31fc HW |
2034 | case IP6T_SO_GET_REVISION_MATCH: |
2035 | case IP6T_SO_GET_REVISION_TARGET: { | |
12b00c2c | 2036 | struct xt_get_revision rev; |
2e4e6a17 | 2037 | int target; |
6b7d31fc HW |
2038 | |
2039 | if (*len != sizeof(rev)) { | |
2040 | ret = -EINVAL; | |
2041 | break; | |
2042 | } | |
2043 | if (copy_from_user(&rev, user, sizeof(rev)) != 0) { | |
2044 | ret = -EFAULT; | |
2045 | break; | |
2046 | } | |
6a8ab060 | 2047 | rev.name[sizeof(rev.name)-1] = 0; |
6b7d31fc HW |
2048 | |
2049 | if (cmd == IP6T_SO_GET_REVISION_TARGET) | |
2e4e6a17 | 2050 | target = 1; |
6b7d31fc | 2051 | else |
2e4e6a17 | 2052 | target = 0; |
6b7d31fc | 2053 | |
2e4e6a17 HW |
2054 | try_then_request_module(xt_find_revision(AF_INET6, rev.name, |
2055 | rev.revision, | |
2056 | target, &ret), | |
6b7d31fc HW |
2057 | "ip6t_%s", rev.name); |
2058 | break; | |
2059 | } | |
2060 | ||
1da177e4 LT |
2061 | default: |
2062 | duprintf("do_ip6t_get_ctl: unknown request %i\n", cmd); | |
2063 | ret = -EINVAL; | |
2064 | } | |
2065 | ||
2066 | return ret; | |
2067 | } | |
2068 | ||
35aad0ff JE |
2069 | struct xt_table *ip6t_register_table(struct net *net, |
2070 | const struct xt_table *table, | |
336b517f | 2071 | const struct ip6t_replace *repl) |
1da177e4 LT |
2072 | { |
2073 | int ret; | |
2e4e6a17 | 2074 | struct xt_table_info *newinfo; |
f3c5c1bf | 2075 | struct xt_table_info bootstrap = {0}; |
31836064 | 2076 | void *loc_cpu_entry; |
a98da11d | 2077 | struct xt_table *new_table; |
1da177e4 | 2078 | |
2e4e6a17 | 2079 | newinfo = xt_alloc_table_info(repl->size); |
44d34e72 AD |
2080 | if (!newinfo) { |
2081 | ret = -ENOMEM; | |
2082 | goto out; | |
2083 | } | |
1da177e4 | 2084 | |
9c547959 | 2085 | /* choose the copy on our node/cpu, but dont care about preemption */ |
31836064 ED |
2086 | loc_cpu_entry = newinfo->entries[raw_smp_processor_id()]; |
2087 | memcpy(loc_cpu_entry, repl->entries, repl->size); | |
1da177e4 | 2088 | |
0f234214 | 2089 | ret = translate_table(net, newinfo, loc_cpu_entry, repl); |
44d34e72 AD |
2090 | if (ret != 0) |
2091 | goto out_free; | |
1da177e4 | 2092 | |
336b517f | 2093 | new_table = xt_register_table(net, table, &bootstrap, newinfo); |
a98da11d | 2094 | if (IS_ERR(new_table)) { |
44d34e72 AD |
2095 | ret = PTR_ERR(new_table); |
2096 | goto out_free; | |
1da177e4 | 2097 | } |
44d34e72 | 2098 | return new_table; |
1da177e4 | 2099 | |
44d34e72 AD |
2100 | out_free: |
2101 | xt_free_table_info(newinfo); | |
2102 | out: | |
2103 | return ERR_PTR(ret); | |
1da177e4 LT |
2104 | } |
2105 | ||
f54e9367 | 2106 | void ip6t_unregister_table(struct net *net, struct xt_table *table) |
1da177e4 | 2107 | { |
2e4e6a17 | 2108 | struct xt_table_info *private; |
31836064 | 2109 | void *loc_cpu_entry; |
df200969 | 2110 | struct module *table_owner = table->me; |
72b2b1dd | 2111 | struct ip6t_entry *iter; |
31836064 | 2112 | |
2e4e6a17 | 2113 | private = xt_unregister_table(table); |
1da177e4 LT |
2114 | |
2115 | /* Decrease module usage counts and free resources */ | |
2e4e6a17 | 2116 | loc_cpu_entry = private->entries[raw_smp_processor_id()]; |
72b2b1dd | 2117 | xt_entry_foreach(iter, loc_cpu_entry, private->size) |
0559518b | 2118 | cleanup_entry(iter, net); |
df200969 AD |
2119 | if (private->number > private->initial_entries) |
2120 | module_put(table_owner); | |
2e4e6a17 | 2121 | xt_free_table_info(private); |
1da177e4 LT |
2122 | } |
2123 | ||
2124 | /* Returns 1 if the type and code is matched by the range, 0 otherwise */ | |
ccb79bdc | 2125 | static inline bool |
1da177e4 LT |
2126 | icmp6_type_code_match(u_int8_t test_type, u_int8_t min_code, u_int8_t max_code, |
2127 | u_int8_t type, u_int8_t code, | |
ccb79bdc | 2128 | bool invert) |
1da177e4 LT |
2129 | { |
2130 | return (type == test_type && code >= min_code && code <= max_code) | |
2131 | ^ invert; | |
2132 | } | |
2133 | ||
1d93a9cb | 2134 | static bool |
62fc8051 | 2135 | icmp6_match(const struct sk_buff *skb, struct xt_action_param *par) |
1da177e4 | 2136 | { |
5452e425 JE |
2137 | const struct icmp6hdr *ic; |
2138 | struct icmp6hdr _icmph; | |
f7108a20 | 2139 | const struct ip6t_icmp *icmpinfo = par->matchinfo; |
1da177e4 LT |
2140 | |
2141 | /* Must not be a fragment. */ | |
f7108a20 | 2142 | if (par->fragoff != 0) |
1d93a9cb | 2143 | return false; |
1da177e4 | 2144 | |
f7108a20 | 2145 | ic = skb_header_pointer(skb, par->thoff, sizeof(_icmph), &_icmph); |
1da177e4 LT |
2146 | if (ic == NULL) { |
2147 | /* We've been asked to examine this packet, and we | |
9c547959 PM |
2148 | * can't. Hence, no choice but to drop. |
2149 | */ | |
1da177e4 | 2150 | duprintf("Dropping evil ICMP tinygram.\n"); |
b4ba2611 | 2151 | par->hotdrop = true; |
1d93a9cb | 2152 | return false; |
1da177e4 LT |
2153 | } |
2154 | ||
2155 | return icmp6_type_code_match(icmpinfo->type, | |
2156 | icmpinfo->code[0], | |
2157 | icmpinfo->code[1], | |
2158 | ic->icmp6_type, ic->icmp6_code, | |
2159 | !!(icmpinfo->invflags&IP6T_ICMP_INV)); | |
2160 | } | |
2161 | ||
2162 | /* Called when user tries to insert an entry of this type. */ | |
b0f38452 | 2163 | static int icmp6_checkentry(const struct xt_mtchk_param *par) |
1da177e4 | 2164 | { |
9b4fce7a | 2165 | const struct ip6t_icmp *icmpinfo = par->matchinfo; |
1da177e4 | 2166 | |
7f939713 | 2167 | /* Must specify no unknown invflags */ |
bd414ee6 | 2168 | return (icmpinfo->invflags & ~IP6T_ICMP_INV) ? -EINVAL : 0; |
1da177e4 LT |
2169 | } |
2170 | ||
2171 | /* The built-in targets: standard (NULL) and error. */ | |
4538506b JE |
2172 | static struct xt_target ip6t_builtin_tg[] __read_mostly = { |
2173 | { | |
243bf6e2 | 2174 | .name = XT_STANDARD_TARGET, |
4538506b JE |
2175 | .targetsize = sizeof(int), |
2176 | .family = NFPROTO_IPV6, | |
3bc3fe5e | 2177 | #ifdef CONFIG_COMPAT |
4538506b JE |
2178 | .compatsize = sizeof(compat_int_t), |
2179 | .compat_from_user = compat_standard_from_user, | |
2180 | .compat_to_user = compat_standard_to_user, | |
3bc3fe5e | 2181 | #endif |
4538506b JE |
2182 | }, |
2183 | { | |
243bf6e2 | 2184 | .name = XT_ERROR_TARGET, |
4538506b | 2185 | .target = ip6t_error, |
12b00c2c | 2186 | .targetsize = XT_FUNCTION_MAXNAMELEN, |
4538506b JE |
2187 | .family = NFPROTO_IPV6, |
2188 | }, | |
1da177e4 LT |
2189 | }; |
2190 | ||
2191 | static struct nf_sockopt_ops ip6t_sockopts = { | |
2192 | .pf = PF_INET6, | |
2193 | .set_optmin = IP6T_BASE_CTL, | |
2194 | .set_optmax = IP6T_SO_SET_MAX+1, | |
2195 | .set = do_ip6t_set_ctl, | |
3bc3fe5e PM |
2196 | #ifdef CONFIG_COMPAT |
2197 | .compat_set = compat_do_ip6t_set_ctl, | |
2198 | #endif | |
1da177e4 LT |
2199 | .get_optmin = IP6T_BASE_CTL, |
2200 | .get_optmax = IP6T_SO_GET_MAX+1, | |
2201 | .get = do_ip6t_get_ctl, | |
3bc3fe5e PM |
2202 | #ifdef CONFIG_COMPAT |
2203 | .compat_get = compat_do_ip6t_get_ctl, | |
2204 | #endif | |
16fcec35 | 2205 | .owner = THIS_MODULE, |
1da177e4 LT |
2206 | }; |
2207 | ||
4538506b JE |
2208 | static struct xt_match ip6t_builtin_mt[] __read_mostly = { |
2209 | { | |
2210 | .name = "icmp6", | |
2211 | .match = icmp6_match, | |
2212 | .matchsize = sizeof(struct ip6t_icmp), | |
2213 | .checkentry = icmp6_checkentry, | |
2214 | .proto = IPPROTO_ICMPV6, | |
2215 | .family = NFPROTO_IPV6, | |
2216 | }, | |
1da177e4 LT |
2217 | }; |
2218 | ||
3cb609d5 AD |
2219 | static int __net_init ip6_tables_net_init(struct net *net) |
2220 | { | |
383ca5b8 | 2221 | return xt_proto_init(net, NFPROTO_IPV6); |
3cb609d5 AD |
2222 | } |
2223 | ||
2224 | static void __net_exit ip6_tables_net_exit(struct net *net) | |
2225 | { | |
383ca5b8 | 2226 | xt_proto_fini(net, NFPROTO_IPV6); |
3cb609d5 AD |
2227 | } |
2228 | ||
2229 | static struct pernet_operations ip6_tables_net_ops = { | |
2230 | .init = ip6_tables_net_init, | |
2231 | .exit = ip6_tables_net_exit, | |
2232 | }; | |
2233 | ||
65b4b4e8 | 2234 | static int __init ip6_tables_init(void) |
1da177e4 LT |
2235 | { |
2236 | int ret; | |
2237 | ||
3cb609d5 | 2238 | ret = register_pernet_subsys(&ip6_tables_net_ops); |
0eff66e6 PM |
2239 | if (ret < 0) |
2240 | goto err1; | |
2e4e6a17 | 2241 | |
25985edc | 2242 | /* No one else will be downing sem now, so we won't sleep */ |
4538506b | 2243 | ret = xt_register_targets(ip6t_builtin_tg, ARRAY_SIZE(ip6t_builtin_tg)); |
0eff66e6 PM |
2244 | if (ret < 0) |
2245 | goto err2; | |
4538506b | 2246 | ret = xt_register_matches(ip6t_builtin_mt, ARRAY_SIZE(ip6t_builtin_mt)); |
0eff66e6 PM |
2247 | if (ret < 0) |
2248 | goto err4; | |
1da177e4 LT |
2249 | |
2250 | /* Register setsockopt */ | |
2251 | ret = nf_register_sockopt(&ip6t_sockopts); | |
0eff66e6 PM |
2252 | if (ret < 0) |
2253 | goto err5; | |
1da177e4 | 2254 | |
ff67e4e4 | 2255 | pr_info("(C) 2000-2006 Netfilter Core Team\n"); |
1da177e4 | 2256 | return 0; |
0eff66e6 PM |
2257 | |
2258 | err5: | |
4538506b | 2259 | xt_unregister_matches(ip6t_builtin_mt, ARRAY_SIZE(ip6t_builtin_mt)); |
0eff66e6 | 2260 | err4: |
4538506b | 2261 | xt_unregister_targets(ip6t_builtin_tg, ARRAY_SIZE(ip6t_builtin_tg)); |
0eff66e6 | 2262 | err2: |
3cb609d5 | 2263 | unregister_pernet_subsys(&ip6_tables_net_ops); |
0eff66e6 PM |
2264 | err1: |
2265 | return ret; | |
1da177e4 LT |
2266 | } |
2267 | ||
65b4b4e8 | 2268 | static void __exit ip6_tables_fini(void) |
1da177e4 LT |
2269 | { |
2270 | nf_unregister_sockopt(&ip6t_sockopts); | |
9c547959 | 2271 | |
4538506b JE |
2272 | xt_unregister_matches(ip6t_builtin_mt, ARRAY_SIZE(ip6t_builtin_mt)); |
2273 | xt_unregister_targets(ip6t_builtin_tg, ARRAY_SIZE(ip6t_builtin_tg)); | |
3cb609d5 | 2274 | unregister_pernet_subsys(&ip6_tables_net_ops); |
1da177e4 LT |
2275 | } |
2276 | ||
e674d0f3 | 2277 | /* |
b777e0ce PM |
2278 | * find the offset to specified header or the protocol number of last header |
2279 | * if target < 0. "last header" is transport protocol header, ESP, or | |
2280 | * "No next header". | |
2281 | * | |
84018f55 HS |
2282 | * Note that *offset is used as input/output parameter. an if it is not zero, |
2283 | * then it must be a valid offset to an inner IPv6 header. This can be used | |
2284 | * to explore inner IPv6 header, eg. ICMPv6 error messages. | |
2285 | * | |
b777e0ce PM |
2286 | * If target header is found, its offset is set in *offset and return protocol |
2287 | * number. Otherwise, return -1. | |
2288 | * | |
6d381634 PM |
2289 | * If the first fragment doesn't contain the final protocol header or |
2290 | * NEXTHDR_NONE it is considered invalid. | |
2291 | * | |
b777e0ce PM |
2292 | * Note that non-1st fragment is special case that "the protocol number |
2293 | * of last header" is "next header" field in Fragment header. In this case, | |
2294 | * *offset is meaningless and fragment offset is stored in *fragoff if fragoff | |
2295 | * isn't NULL. | |
e674d0f3 | 2296 | * |
84018f55 HS |
2297 | * if flags is not NULL and it's a fragment, then the frag flag IP6T_FH_F_FRAG |
2298 | * will be set. If it's an AH header, the IP6T_FH_F_AUTH flag is set and | |
2299 | * target < 0, then this function will stop at the AH header. | |
e674d0f3 | 2300 | */ |
b777e0ce | 2301 | int ipv6_find_hdr(const struct sk_buff *skb, unsigned int *offset, |
84018f55 | 2302 | int target, unsigned short *fragoff, int *flags) |
e674d0f3 | 2303 | { |
6b88dd96 | 2304 | unsigned int start = skb_network_offset(skb) + sizeof(struct ipv6hdr); |
0660e03f | 2305 | u8 nexthdr = ipv6_hdr(skb)->nexthdr; |
84018f55 | 2306 | unsigned int len; |
e674d0f3 | 2307 | |
b777e0ce PM |
2308 | if (fragoff) |
2309 | *fragoff = 0; | |
2310 | ||
84018f55 HS |
2311 | if (*offset) { |
2312 | struct ipv6hdr _ip6, *ip6; | |
2313 | ||
2314 | ip6 = skb_header_pointer(skb, *offset, sizeof(_ip6), &_ip6); | |
2315 | if (!ip6 || (ip6->version != 6)) { | |
2316 | printk(KERN_ERR "IPv6 header not found\n"); | |
2317 | return -EBADMSG; | |
2318 | } | |
2319 | start = *offset + sizeof(struct ipv6hdr); | |
2320 | nexthdr = ip6->nexthdr; | |
2321 | } | |
2322 | len = skb->len - start; | |
2323 | ||
e674d0f3 YK |
2324 | while (nexthdr != target) { |
2325 | struct ipv6_opt_hdr _hdr, *hp; | |
2326 | unsigned int hdrlen; | |
2327 | ||
b777e0ce PM |
2328 | if ((!ipv6_ext_hdr(nexthdr)) || nexthdr == NEXTHDR_NONE) { |
2329 | if (target < 0) | |
2330 | break; | |
6d381634 | 2331 | return -ENOENT; |
b777e0ce PM |
2332 | } |
2333 | ||
e674d0f3 YK |
2334 | hp = skb_header_pointer(skb, start, sizeof(_hdr), &_hdr); |
2335 | if (hp == NULL) | |
6d381634 | 2336 | return -EBADMSG; |
e674d0f3 | 2337 | if (nexthdr == NEXTHDR_FRAGMENT) { |
e69a4adc AV |
2338 | unsigned short _frag_off; |
2339 | __be16 *fp; | |
84018f55 HS |
2340 | |
2341 | if (flags) /* Indicate that this is a fragment */ | |
2342 | *flags |= IP6T_FH_F_FRAG; | |
e674d0f3 YK |
2343 | fp = skb_header_pointer(skb, |
2344 | start+offsetof(struct frag_hdr, | |
2345 | frag_off), | |
2346 | sizeof(_frag_off), | |
2347 | &_frag_off); | |
2348 | if (fp == NULL) | |
6d381634 | 2349 | return -EBADMSG; |
e674d0f3 | 2350 | |
b777e0ce PM |
2351 | _frag_off = ntohs(*fp) & ~0x7; |
2352 | if (_frag_off) { | |
2353 | if (target < 0 && | |
2354 | ((!ipv6_ext_hdr(hp->nexthdr)) || | |
337dde79 | 2355 | hp->nexthdr == NEXTHDR_NONE)) { |
b777e0ce PM |
2356 | if (fragoff) |
2357 | *fragoff = _frag_off; | |
2358 | return hp->nexthdr; | |
2359 | } | |
6d381634 | 2360 | return -ENOENT; |
b777e0ce | 2361 | } |
e674d0f3 | 2362 | hdrlen = 8; |
84018f55 HS |
2363 | } else if (nexthdr == NEXTHDR_AUTH) { |
2364 | if (flags && (*flags & IP6T_FH_F_AUTH) && (target < 0)) | |
2365 | break; | |
1ab1457c | 2366 | hdrlen = (hp->hdrlen + 2) << 2; |
84018f55 | 2367 | } else |
1ab1457c | 2368 | hdrlen = ipv6_optlen(hp); |
e674d0f3 YK |
2369 | |
2370 | nexthdr = hp->nexthdr; | |
2371 | len -= hdrlen; | |
2372 | start += hdrlen; | |
2373 | } | |
2374 | ||
2375 | *offset = start; | |
b777e0ce | 2376 | return nexthdr; |
e674d0f3 YK |
2377 | } |
2378 | ||
1da177e4 LT |
2379 | EXPORT_SYMBOL(ip6t_register_table); |
2380 | EXPORT_SYMBOL(ip6t_unregister_table); | |
2381 | EXPORT_SYMBOL(ip6t_do_table); | |
e674d0f3 | 2382 | EXPORT_SYMBOL(ipv6_find_hdr); |
1da177e4 | 2383 | |
65b4b4e8 AM |
2384 | module_init(ip6_tables_init); |
2385 | module_exit(ip6_tables_fini); |