Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Packet matching code. |
| 3 | * |
| 4 | * Copyright (C) 1999 Paul `Rusty' Russell & Michael J. Neuling |
Harald Welte | 6b7d31f | 2005-10-26 09:34:24 +0200 | [diff] [blame] | 5 | * Copyright (C) 2000-2005 Netfilter Core Team <coreteam@netfilter.org> |
Patrick McHardy | f229f6c | 2013-04-06 15:24:29 +0200 | [diff] [blame] | 6 | * Copyright (c) 2006-2010 Patrick McHardy <kaber@trash.net> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License version 2 as |
| 10 | * published by the Free Software Foundation. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | */ |
Joe Perches | a81b2ce | 2015-03-23 11:50:10 -0700 | [diff] [blame] | 12 | |
Jan Engelhardt | 90e7d4a | 2009-07-09 22:54:53 +0200 | [diff] [blame] | 13 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
Joe Perches | a81b2ce | 2015-03-23 11:50:10 -0700 | [diff] [blame] | 14 | |
| 15 | #include <linux/kernel.h> |
Randy Dunlap | 4fc268d | 2006-01-11 12:17:47 -0800 | [diff] [blame] | 16 | #include <linux/capability.h> |
Arnaldo Carvalho de Melo | 14c8502 | 2005-12-27 02:43:12 -0200 | [diff] [blame] | 17 | #include <linux/in.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | #include <linux/skbuff.h> |
| 19 | #include <linux/kmod.h> |
| 20 | #include <linux/vmalloc.h> |
| 21 | #include <linux/netdevice.h> |
| 22 | #include <linux/module.h> |
Randy Dunlap | 4bdbf6c | 2006-07-03 19:47:27 -0700 | [diff] [blame] | 23 | #include <linux/poison.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | #include <linux/icmpv6.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | #include <net/ipv6.h> |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 26 | #include <net/compat.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | #include <asm/uaccess.h> |
Ingo Molnar | 57b47a5 | 2006-03-20 22:35:41 -0800 | [diff] [blame] | 28 | #include <linux/mutex.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | #include <linux/proc_fs.h> |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 30 | #include <linux/err.h> |
David S. Miller | c8923c6 | 2005-10-13 14:41:23 -0700 | [diff] [blame] | 31 | #include <linux/cpumask.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | |
| 33 | #include <linux/netfilter_ipv6/ip6_tables.h> |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 34 | #include <linux/netfilter/x_tables.h> |
Patrick McHardy | f01ffbd | 2007-12-17 22:38:49 -0800 | [diff] [blame] | 35 | #include <net/netfilter/nf_log.h> |
Jan Engelhardt | e3eaa99 | 2009-06-17 22:14:54 +0200 | [diff] [blame] | 36 | #include "../../netfilter/xt_repldata.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | |
| 38 | MODULE_LICENSE("GPL"); |
| 39 | MODULE_AUTHOR("Netfilter Core Team <coreteam@netfilter.org>"); |
| 40 | MODULE_DESCRIPTION("IPv6 packet filter"); |
| 41 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | #ifdef CONFIG_NETFILTER_DEBUG |
Stephen Hemminger | af56760 | 2010-05-13 15:00:20 +0200 | [diff] [blame] | 43 | #define IP_NF_ASSERT(x) WARN_ON(!(x)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | #else |
| 45 | #define IP_NF_ASSERT(x) |
| 46 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | |
Jan Engelhardt | e3eaa99 | 2009-06-17 22:14:54 +0200 | [diff] [blame] | 48 | void *ip6t_alloc_initial_table(const struct xt_table *info) |
| 49 | { |
| 50 | return xt_alloc_initial_table(ip6t, IP6T); |
| 51 | } |
| 52 | EXPORT_SYMBOL_GPL(ip6t_alloc_initial_table); |
| 53 | |
Harald Welte | 6b7d31f | 2005-10-26 09:34:24 +0200 | [diff] [blame] | 54 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | We keep a set of rules for each CPU, so we can avoid write-locking |
Harald Welte | 6b7d31f | 2005-10-26 09:34:24 +0200 | [diff] [blame] | 56 | them in the softirq when updating the counters and therefore |
| 57 | only need to read-lock in the softirq; doing a write_lock_bh() in user |
| 58 | context stops packets coming through and allows user context to read |
| 59 | the counters or update the rules. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | Hence the start of any table is given by get_table() below. */ |
| 62 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | /* Returns whether matches rule or not. */ |
Denys Vlasenko | 022748a | 2008-01-14 23:44:05 -0800 | [diff] [blame] | 64 | /* Performance critical - called for every packet */ |
Jan Engelhardt | 1d93a9c | 2007-07-07 22:15:35 -0700 | [diff] [blame] | 65 | static inline bool |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | ip6_packet_match(const struct sk_buff *skb, |
| 67 | const char *indev, |
| 68 | const char *outdev, |
| 69 | const struct ip6t_ip6 *ip6info, |
| 70 | unsigned int *protoff, |
Jan Engelhardt | cff533a | 2007-07-07 22:15:12 -0700 | [diff] [blame] | 71 | int *fragoff, bool *hotdrop) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | unsigned long ret; |
Arnaldo Carvalho de Melo | 0660e03 | 2007-04-25 17:54:47 -0700 | [diff] [blame] | 74 | const struct ipv6hdr *ipv6 = ipv6_hdr(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | |
Joe Perches | c37a2df | 2016-06-24 13:25:22 -0700 | [diff] [blame] | 76 | if (NF_INVF(ip6info, IP6T_INV_SRCIP, |
| 77 | ipv6_masked_addr_cmp(&ipv6->saddr, &ip6info->smsk, |
| 78 | &ip6info->src)) || |
| 79 | NF_INVF(ip6info, IP6T_INV_DSTIP, |
| 80 | ipv6_masked_addr_cmp(&ipv6->daddr, &ip6info->dmsk, |
| 81 | &ip6info->dst))) |
Jan Engelhardt | 1d93a9c | 2007-07-07 22:15:35 -0700 | [diff] [blame] | 82 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | |
Eric Dumazet | b8dfe49 | 2009-03-25 17:31:52 +0100 | [diff] [blame] | 84 | ret = ifname_compare_aligned(indev, ip6info->iniface, ip6info->iniface_mask); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | |
Joe Perches | c37a2df | 2016-06-24 13:25:22 -0700 | [diff] [blame] | 86 | if (NF_INVF(ip6info, IP6T_INV_VIA_IN, ret != 0)) |
Jan Engelhardt | 1d93a9c | 2007-07-07 22:15:35 -0700 | [diff] [blame] | 87 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | |
Eric Dumazet | b8dfe49 | 2009-03-25 17:31:52 +0100 | [diff] [blame] | 89 | ret = ifname_compare_aligned(outdev, ip6info->outiface, ip6info->outiface_mask); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | |
Joe Perches | c37a2df | 2016-06-24 13:25:22 -0700 | [diff] [blame] | 91 | if (NF_INVF(ip6info, IP6T_INV_VIA_OUT, ret != 0)) |
Jan Engelhardt | 1d93a9c | 2007-07-07 22:15:35 -0700 | [diff] [blame] | 92 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | |
| 94 | /* ... might want to do something with class and flowlabel here ... */ |
| 95 | |
| 96 | /* look for the desired protocol header */ |
Ian Morris | 4305ae4 | 2015-10-11 17:32:19 +0100 | [diff] [blame] | 97 | if (ip6info->flags & IP6T_F_PROTO) { |
Patrick McHardy | b777e0c | 2006-01-05 12:21:16 -0800 | [diff] [blame] | 98 | int protohdr; |
| 99 | unsigned short _frag_off; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | |
Hans Schillstrom | 84018f5 | 2012-04-23 03:35:26 +0000 | [diff] [blame] | 101 | protohdr = ipv6_find_hdr(skb, protoff, -1, &_frag_off, NULL); |
Patrick McHardy | 51d8b1a | 2006-10-24 16:14:04 -0700 | [diff] [blame] | 102 | if (protohdr < 0) { |
| 103 | if (_frag_off == 0) |
Jan Engelhardt | cff533a | 2007-07-07 22:15:12 -0700 | [diff] [blame] | 104 | *hotdrop = true; |
Jan Engelhardt | 1d93a9c | 2007-07-07 22:15:35 -0700 | [diff] [blame] | 105 | return false; |
Patrick McHardy | 51d8b1a | 2006-10-24 16:14:04 -0700 | [diff] [blame] | 106 | } |
Patrick McHardy | b777e0c | 2006-01-05 12:21:16 -0800 | [diff] [blame] | 107 | *fragoff = _frag_off; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | |
Patrick McHardy | b777e0c | 2006-01-05 12:21:16 -0800 | [diff] [blame] | 109 | if (ip6info->proto == protohdr) { |
Ian Morris | 4305ae4 | 2015-10-11 17:32:19 +0100 | [diff] [blame] | 110 | if (ip6info->invflags & IP6T_INV_PROTO) |
Jan Engelhardt | 1d93a9c | 2007-07-07 22:15:35 -0700 | [diff] [blame] | 111 | return false; |
Ian Morris | 4305ae4 | 2015-10-11 17:32:19 +0100 | [diff] [blame] | 112 | |
Jan Engelhardt | 1d93a9c | 2007-07-07 22:15:35 -0700 | [diff] [blame] | 113 | return true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | } |
| 115 | |
| 116 | /* We need match for the '-p all', too! */ |
| 117 | if ((ip6info->proto != 0) && |
| 118 | !(ip6info->invflags & IP6T_INV_PROTO)) |
Jan Engelhardt | 1d93a9c | 2007-07-07 22:15:35 -0700 | [diff] [blame] | 119 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | } |
Jan Engelhardt | 1d93a9c | 2007-07-07 22:15:35 -0700 | [diff] [blame] | 121 | return true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | } |
| 123 | |
| 124 | /* should be ip6 safe */ |
Denys Vlasenko | 022748a | 2008-01-14 23:44:05 -0800 | [diff] [blame] | 125 | static bool |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | ip6_checkentry(const struct ip6t_ip6 *ipv6) |
| 127 | { |
Pablo Neira Ayuso | d7cdf81 | 2016-05-03 13:54:23 +0200 | [diff] [blame] | 128 | if (ipv6->flags & ~IP6T_F_MASK) |
Jan Engelhardt | ccb79bd | 2007-07-07 22:16:00 -0700 | [diff] [blame] | 129 | return false; |
Pablo Neira Ayuso | d7cdf81 | 2016-05-03 13:54:23 +0200 | [diff] [blame] | 130 | if (ipv6->invflags & ~IP6T_INV_MASK) |
Jan Engelhardt | ccb79bd | 2007-07-07 22:16:00 -0700 | [diff] [blame] | 131 | return false; |
Pablo Neira Ayuso | d7cdf81 | 2016-05-03 13:54:23 +0200 | [diff] [blame] | 132 | |
Jan Engelhardt | ccb79bd | 2007-07-07 22:16:00 -0700 | [diff] [blame] | 133 | return true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | } |
| 135 | |
| 136 | static unsigned int |
Jan Engelhardt | 4b560b4 | 2009-07-05 19:43:26 +0200 | [diff] [blame] | 137 | ip6t_error(struct sk_buff *skb, const struct xt_action_param *par) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | { |
Joe Perches | e87cc47 | 2012-05-13 21:56:26 +0000 | [diff] [blame] | 139 | net_info_ratelimited("error: `%s'\n", (const char *)par->targinfo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | |
| 141 | return NF_DROP; |
| 142 | } |
| 143 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | static inline struct ip6t_entry * |
Jan Engelhardt | d5d1baa | 2009-06-26 07:51:59 +0200 | [diff] [blame] | 145 | get_entry(const void *base, unsigned int offset) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | { |
| 147 | return (struct ip6t_entry *)(base + offset); |
| 148 | } |
| 149 | |
Jozsef Kadlecsik | ba9dda3 | 2007-07-07 22:21:23 -0700 | [diff] [blame] | 150 | /* All zeroes == unconditional rule. */ |
Denys Vlasenko | 022748a | 2008-01-14 23:44:05 -0800 | [diff] [blame] | 151 | /* Mildly perf critical (only if packet tracing is on) */ |
Florian Westphal | 54d83fc | 2016-03-22 18:02:52 +0100 | [diff] [blame] | 152 | static inline bool unconditional(const struct ip6t_entry *e) |
Jozsef Kadlecsik | ba9dda3 | 2007-07-07 22:21:23 -0700 | [diff] [blame] | 153 | { |
Jan Engelhardt | 47901dc | 2009-07-09 23:00:19 +0200 | [diff] [blame] | 154 | static const struct ip6t_ip6 uncond; |
Jozsef Kadlecsik | ba9dda3 | 2007-07-07 22:21:23 -0700 | [diff] [blame] | 155 | |
Florian Westphal | 54d83fc | 2016-03-22 18:02:52 +0100 | [diff] [blame] | 156 | return e->target_offset == sizeof(struct ip6t_entry) && |
| 157 | memcmp(&e->ipv6, &uncond, sizeof(uncond)) == 0; |
Jozsef Kadlecsik | ba9dda3 | 2007-07-07 22:21:23 -0700 | [diff] [blame] | 158 | } |
| 159 | |
Jan Engelhardt | 87a2e70d | 2010-10-13 16:11:22 +0200 | [diff] [blame] | 160 | static inline const struct xt_entry_target * |
Jan Engelhardt | d5d1baa | 2009-06-26 07:51:59 +0200 | [diff] [blame] | 161 | ip6t_get_target_c(const struct ip6t_entry *e) |
| 162 | { |
| 163 | return ip6t_get_target((struct ip6t_entry *)e); |
| 164 | } |
| 165 | |
Amerigo Wang | 07a9362 | 2012-10-29 16:23:10 +0000 | [diff] [blame] | 166 | #if IS_ENABLED(CONFIG_NETFILTER_XT_TARGET_TRACE) |
Jozsef Kadlecsik | ba9dda3 | 2007-07-07 22:21:23 -0700 | [diff] [blame] | 167 | /* This cries for unification! */ |
Denys Vlasenko | 022748a | 2008-01-14 23:44:05 -0800 | [diff] [blame] | 168 | static const char *const hooknames[] = { |
Patrick McHardy | 6e23ae2 | 2007-11-19 18:53:30 -0800 | [diff] [blame] | 169 | [NF_INET_PRE_ROUTING] = "PREROUTING", |
| 170 | [NF_INET_LOCAL_IN] = "INPUT", |
| 171 | [NF_INET_FORWARD] = "FORWARD", |
| 172 | [NF_INET_LOCAL_OUT] = "OUTPUT", |
| 173 | [NF_INET_POST_ROUTING] = "POSTROUTING", |
Jozsef Kadlecsik | ba9dda3 | 2007-07-07 22:21:23 -0700 | [diff] [blame] | 174 | }; |
| 175 | |
| 176 | enum nf_ip_trace_comments { |
| 177 | NF_IP6_TRACE_COMMENT_RULE, |
| 178 | NF_IP6_TRACE_COMMENT_RETURN, |
| 179 | NF_IP6_TRACE_COMMENT_POLICY, |
| 180 | }; |
| 181 | |
Denys Vlasenko | 022748a | 2008-01-14 23:44:05 -0800 | [diff] [blame] | 182 | static const char *const comments[] = { |
Jozsef Kadlecsik | ba9dda3 | 2007-07-07 22:21:23 -0700 | [diff] [blame] | 183 | [NF_IP6_TRACE_COMMENT_RULE] = "rule", |
| 184 | [NF_IP6_TRACE_COMMENT_RETURN] = "return", |
| 185 | [NF_IP6_TRACE_COMMENT_POLICY] = "policy", |
| 186 | }; |
| 187 | |
| 188 | static struct nf_loginfo trace_loginfo = { |
| 189 | .type = NF_LOG_TYPE_LOG, |
| 190 | .u = { |
| 191 | .log = { |
Joe Perches | a81b2ce | 2015-03-23 11:50:10 -0700 | [diff] [blame] | 192 | .level = LOGLEVEL_WARNING, |
Liping Zhang | ff107d2 | 2016-09-25 16:35:56 +0800 | [diff] [blame] | 193 | .logflags = NF_LOG_DEFAULT_MASK, |
Jozsef Kadlecsik | ba9dda3 | 2007-07-07 22:21:23 -0700 | [diff] [blame] | 194 | }, |
| 195 | }, |
| 196 | }; |
| 197 | |
Denys Vlasenko | 022748a | 2008-01-14 23:44:05 -0800 | [diff] [blame] | 198 | /* Mildly perf critical (only if packet tracing is on) */ |
Jozsef Kadlecsik | ba9dda3 | 2007-07-07 22:21:23 -0700 | [diff] [blame] | 199 | static inline int |
Jan Engelhardt | d5d1baa | 2009-06-26 07:51:59 +0200 | [diff] [blame] | 200 | get_chainname_rulenum(const struct ip6t_entry *s, const struct ip6t_entry *e, |
Jan Engelhardt | 4f2f6f2 | 2009-04-15 20:31:13 +0200 | [diff] [blame] | 201 | const char *hookname, const char **chainname, |
| 202 | const char **comment, unsigned int *rulenum) |
Jozsef Kadlecsik | ba9dda3 | 2007-07-07 22:21:23 -0700 | [diff] [blame] | 203 | { |
Jan Engelhardt | 87a2e70d | 2010-10-13 16:11:22 +0200 | [diff] [blame] | 204 | const struct xt_standard_target *t = (void *)ip6t_get_target_c(s); |
Jozsef Kadlecsik | ba9dda3 | 2007-07-07 22:21:23 -0700 | [diff] [blame] | 205 | |
Jan Engelhardt | 243bf6e | 2010-10-13 16:28:00 +0200 | [diff] [blame] | 206 | if (strcmp(t->target.u.kernel.target->name, XT_ERROR_TARGET) == 0) { |
Jozsef Kadlecsik | ba9dda3 | 2007-07-07 22:21:23 -0700 | [diff] [blame] | 207 | /* Head of user chain: ERROR target with chainname */ |
| 208 | *chainname = t->target.data; |
| 209 | (*rulenum) = 0; |
| 210 | } else if (s == e) { |
| 211 | (*rulenum)++; |
| 212 | |
Florian Westphal | 54d83fc | 2016-03-22 18:02:52 +0100 | [diff] [blame] | 213 | if (unconditional(s) && |
Joe Perches | 3666ed1 | 2009-11-23 23:17:06 +0100 | [diff] [blame] | 214 | strcmp(t->target.u.kernel.target->name, |
Jan Engelhardt | 243bf6e | 2010-10-13 16:28:00 +0200 | [diff] [blame] | 215 | XT_STANDARD_TARGET) == 0 && |
Florian Westphal | 54d83fc | 2016-03-22 18:02:52 +0100 | [diff] [blame] | 216 | t->verdict < 0) { |
Jozsef Kadlecsik | ba9dda3 | 2007-07-07 22:21:23 -0700 | [diff] [blame] | 217 | /* Tail of chains: STANDARD target (return/policy) */ |
| 218 | *comment = *chainname == hookname |
Jan Engelhardt | 4f2f6f2 | 2009-04-15 20:31:13 +0200 | [diff] [blame] | 219 | ? comments[NF_IP6_TRACE_COMMENT_POLICY] |
| 220 | : comments[NF_IP6_TRACE_COMMENT_RETURN]; |
Jozsef Kadlecsik | ba9dda3 | 2007-07-07 22:21:23 -0700 | [diff] [blame] | 221 | } |
| 222 | return 1; |
| 223 | } else |
| 224 | (*rulenum)++; |
| 225 | |
| 226 | return 0; |
| 227 | } |
| 228 | |
Eric W. Biederman | 9dff2c9 | 2015-09-15 20:04:17 -0500 | [diff] [blame] | 229 | static void trace_packet(struct net *net, |
| 230 | const struct sk_buff *skb, |
Jozsef Kadlecsik | ba9dda3 | 2007-07-07 22:21:23 -0700 | [diff] [blame] | 231 | unsigned int hook, |
| 232 | const struct net_device *in, |
| 233 | const struct net_device *out, |
Jan Engelhardt | ecb6f85 | 2008-01-31 03:54:47 -0800 | [diff] [blame] | 234 | const char *tablename, |
Jan Engelhardt | d5d1baa | 2009-06-26 07:51:59 +0200 | [diff] [blame] | 235 | const struct xt_table_info *private, |
| 236 | const struct ip6t_entry *e) |
Jozsef Kadlecsik | ba9dda3 | 2007-07-07 22:21:23 -0700 | [diff] [blame] | 237 | { |
Jan Engelhardt | 5452e42 | 2008-04-14 11:15:35 +0200 | [diff] [blame] | 238 | const struct ip6t_entry *root; |
Jan Engelhardt | 4f2f6f2 | 2009-04-15 20:31:13 +0200 | [diff] [blame] | 239 | const char *hookname, *chainname, *comment; |
Jan Engelhardt | 72b2b1d | 2010-02-24 18:32:59 +0100 | [diff] [blame] | 240 | const struct ip6t_entry *iter; |
Jozsef Kadlecsik | ba9dda3 | 2007-07-07 22:21:23 -0700 | [diff] [blame] | 241 | unsigned int rulenum = 0; |
| 242 | |
Florian Westphal | 482cfc3 | 2015-06-11 01:34:55 +0200 | [diff] [blame] | 243 | root = get_entry(private->entries, private->hook_entry[hook]); |
Jozsef Kadlecsik | ba9dda3 | 2007-07-07 22:21:23 -0700 | [diff] [blame] | 244 | |
Jan Engelhardt | 4f2f6f2 | 2009-04-15 20:31:13 +0200 | [diff] [blame] | 245 | hookname = chainname = hooknames[hook]; |
| 246 | comment = comments[NF_IP6_TRACE_COMMENT_RULE]; |
Jozsef Kadlecsik | ba9dda3 | 2007-07-07 22:21:23 -0700 | [diff] [blame] | 247 | |
Jan Engelhardt | 72b2b1d | 2010-02-24 18:32:59 +0100 | [diff] [blame] | 248 | xt_entry_foreach(iter, root, private->size - private->hook_entry[hook]) |
| 249 | if (get_chainname_rulenum(iter, e, hookname, |
| 250 | &chainname, &comment, &rulenum) != 0) |
| 251 | break; |
Jozsef Kadlecsik | ba9dda3 | 2007-07-07 22:21:23 -0700 | [diff] [blame] | 252 | |
Pablo Neira Ayuso | 4017a7e | 2015-03-02 01:10:28 +0100 | [diff] [blame] | 253 | nf_log_trace(net, AF_INET6, hook, skb, in, out, &trace_loginfo, |
| 254 | "TRACE: %s:%s:%s:%u ", |
| 255 | tablename, chainname, comment, rulenum); |
Jozsef Kadlecsik | ba9dda3 | 2007-07-07 22:21:23 -0700 | [diff] [blame] | 256 | } |
| 257 | #endif |
| 258 | |
Florian Westphal | 6c7941d | 2015-07-14 17:51:10 +0200 | [diff] [blame] | 259 | static inline struct ip6t_entry * |
Jan Engelhardt | 98e8640 | 2009-04-15 21:06:05 +0200 | [diff] [blame] | 260 | ip6t_next_entry(const struct ip6t_entry *entry) |
| 261 | { |
| 262 | return (void *)entry + entry->next_offset; |
| 263 | } |
| 264 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | /* Returns one of the generic firewall policies, like NF_ACCEPT. */ |
| 266 | unsigned int |
Herbert Xu | 3db05fe | 2007-10-15 00:53:15 -0700 | [diff] [blame] | 267 | ip6t_do_table(struct sk_buff *skb, |
David S. Miller | 8f8a371 | 2015-04-03 21:09:51 -0400 | [diff] [blame] | 268 | const struct nf_hook_state *state, |
Patrick McHardy | fe1cb10 | 2006-08-22 00:35:47 -0700 | [diff] [blame] | 269 | struct xt_table *table) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 270 | { |
Eric W. Biederman | 6cb8ff3f1 | 2015-09-18 14:32:55 -0500 | [diff] [blame] | 271 | unsigned int hook = state->hook; |
Harald Welte | 6b7d31f | 2005-10-26 09:34:24 +0200 | [diff] [blame] | 272 | static const char nulldevname[IFNAMSIZ] __attribute__((aligned(sizeof(long)))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | /* Initializing verdict to NF_DROP keeps gcc happy. */ |
| 274 | unsigned int verdict = NF_DROP; |
| 275 | const char *indev, *outdev; |
Jan Engelhardt | d5d1baa | 2009-06-26 07:51:59 +0200 | [diff] [blame] | 276 | const void *table_base; |
Jan Engelhardt | f3c5c1b | 2010-04-19 16:05:10 +0200 | [diff] [blame] | 277 | struct ip6t_entry *e, **jumpstack; |
Florian Westphal | 7814b6e | 2015-07-14 17:51:08 +0200 | [diff] [blame] | 278 | unsigned int stackidx, cpu; |
Jan Engelhardt | d5d1baa | 2009-06-26 07:51:59 +0200 | [diff] [blame] | 279 | const struct xt_table_info *private; |
Jan Engelhardt | de74c16 | 2009-07-05 18:26:37 +0200 | [diff] [blame] | 280 | struct xt_action_param acpar; |
Eric Dumazet | 7f5c6d4 | 2011-04-04 17:04:03 +0200 | [diff] [blame] | 281 | unsigned int addend; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | |
| 283 | /* Initialization */ |
Florian Westphal | 7814b6e | 2015-07-14 17:51:08 +0200 | [diff] [blame] | 284 | stackidx = 0; |
David S. Miller | 8f8a371 | 2015-04-03 21:09:51 -0400 | [diff] [blame] | 285 | indev = state->in ? state->in->name : nulldevname; |
| 286 | outdev = state->out ? state->out->name : nulldevname; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | /* We handle fragments by dealing with the first fragment as |
| 288 | * if it was a normal packet. All other fragments are treated |
| 289 | * normally, except that they will NEVER match rules that ask |
| 290 | * things we don't know, ie. tcp syn flag or ports). If the |
| 291 | * rule is also a fragment-specific rule, non-fragments won't |
| 292 | * match it. */ |
Jan Engelhardt | b4ba261 | 2009-07-07 20:54:30 +0200 | [diff] [blame] | 293 | acpar.hotdrop = false; |
Eric W. Biederman | 156c196 | 2015-09-18 14:32:58 -0500 | [diff] [blame] | 294 | acpar.net = state->net; |
David S. Miller | 8f8a371 | 2015-04-03 21:09:51 -0400 | [diff] [blame] | 295 | acpar.in = state->in; |
| 296 | acpar.out = state->out; |
Jan Engelhardt | de74c16 | 2009-07-05 18:26:37 +0200 | [diff] [blame] | 297 | acpar.family = NFPROTO_IPV6; |
| 298 | acpar.hooknum = hook; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 299 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | IP_NF_ASSERT(table->valid_hooks & (1 << hook)); |
Stephen Hemminger | 7845447 | 2009-02-20 10:35:32 +0100 | [diff] [blame] | 301 | |
Eric Dumazet | 7f5c6d4 | 2011-04-04 17:04:03 +0200 | [diff] [blame] | 302 | local_bh_disable(); |
| 303 | addend = xt_write_recseq_begin(); |
Stephen Hemminger | 942e4a2 | 2009-04-28 22:36:33 -0700 | [diff] [blame] | 304 | private = table->private; |
Will Deacon | b416c14 | 2013-10-21 13:14:53 +0100 | [diff] [blame] | 305 | /* |
| 306 | * Ensure we load private-> members after we've fetched the base |
| 307 | * pointer. |
| 308 | */ |
| 309 | smp_read_barrier_depends(); |
Jan Engelhardt | f3c5c1b | 2010-04-19 16:05:10 +0200 | [diff] [blame] | 310 | cpu = smp_processor_id(); |
Florian Westphal | 482cfc3 | 2015-06-11 01:34:55 +0200 | [diff] [blame] | 311 | table_base = private->entries; |
Jan Engelhardt | f3c5c1b | 2010-04-19 16:05:10 +0200 | [diff] [blame] | 312 | jumpstack = (struct ip6t_entry **)private->jumpstack[cpu]; |
Florian Westphal | 7814b6e | 2015-07-14 17:51:08 +0200 | [diff] [blame] | 313 | |
| 314 | /* Switch to alternate jumpstack if we're being invoked via TEE. |
| 315 | * TEE issues XT_CONTINUE verdict on original skb so we must not |
| 316 | * clobber the jumpstack. |
| 317 | * |
| 318 | * For recursion via REJECT or SYNPROXY the stack will be clobbered |
| 319 | * but it is no problem since absolute verdict is issued by these. |
| 320 | */ |
Florian Westphal | dcebd31 | 2015-07-14 17:51:09 +0200 | [diff] [blame] | 321 | if (static_key_false(&xt_tee_enabled)) |
| 322 | jumpstack += private->stacksize * __this_cpu_read(nf_skb_duplicated); |
Stephen Hemminger | 7845447 | 2009-02-20 10:35:32 +0100 | [diff] [blame] | 323 | |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 324 | e = get_entry(table_base, private->hook_entry[hook]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | do { |
Jan Engelhardt | 87a2e70d | 2010-10-13 16:11:22 +0200 | [diff] [blame] | 327 | const struct xt_entry_target *t; |
Jan Engelhardt | dcea992 | 2010-02-24 18:34:48 +0100 | [diff] [blame] | 328 | const struct xt_entry_match *ematch; |
Florian Westphal | 71ae0df | 2015-06-11 01:34:54 +0200 | [diff] [blame] | 329 | struct xt_counters *counter; |
Jan Engelhardt | a1ff4ac | 2009-04-15 21:28:39 +0200 | [diff] [blame] | 330 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 331 | IP_NF_ASSERT(e); |
Hans Schillstrom | 84018f5 | 2012-04-23 03:35:26 +0000 | [diff] [blame] | 332 | acpar.thoff = 0; |
Jan Engelhardt | a1ff4ac | 2009-04-15 21:28:39 +0200 | [diff] [blame] | 333 | if (!ip6_packet_match(skb, indev, outdev, &e->ipv6, |
Jan Engelhardt | b4ba261 | 2009-07-07 20:54:30 +0200 | [diff] [blame] | 334 | &acpar.thoff, &acpar.fragoff, &acpar.hotdrop)) { |
Jan Engelhardt | dcea992 | 2010-02-24 18:34:48 +0100 | [diff] [blame] | 335 | no_match: |
Jan Engelhardt | a1ff4ac | 2009-04-15 21:28:39 +0200 | [diff] [blame] | 336 | e = ip6t_next_entry(e); |
| 337 | continue; |
| 338 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | |
Jan Engelhardt | ef53d70 | 2009-07-09 19:14:18 +0200 | [diff] [blame] | 340 | xt_ematch_foreach(ematch, e) { |
Jan Engelhardt | de74c16 | 2009-07-05 18:26:37 +0200 | [diff] [blame] | 341 | acpar.match = ematch->u.kernel.match; |
| 342 | acpar.matchinfo = ematch->data; |
| 343 | if (!acpar.match->match(skb, &acpar)) |
Jan Engelhardt | dcea992 | 2010-02-24 18:34:48 +0100 | [diff] [blame] | 344 | goto no_match; |
Jan Engelhardt | ef53d70 | 2009-07-09 19:14:18 +0200 | [diff] [blame] | 345 | } |
Jan Engelhardt | dcea992 | 2010-02-24 18:34:48 +0100 | [diff] [blame] | 346 | |
Florian Westphal | 71ae0df | 2015-06-11 01:34:54 +0200 | [diff] [blame] | 347 | counter = xt_get_this_cpu_counter(&e->counters); |
| 348 | ADD_COUNTER(*counter, skb->len, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | |
Jan Engelhardt | d5d1baa | 2009-06-26 07:51:59 +0200 | [diff] [blame] | 350 | t = ip6t_get_target_c(e); |
Jan Engelhardt | a1ff4ac | 2009-04-15 21:28:39 +0200 | [diff] [blame] | 351 | IP_NF_ASSERT(t->u.kernel.target); |
Jozsef Kadlecsik | ba9dda3 | 2007-07-07 22:21:23 -0700 | [diff] [blame] | 352 | |
Amerigo Wang | 07a9362 | 2012-10-29 16:23:10 +0000 | [diff] [blame] | 353 | #if IS_ENABLED(CONFIG_NETFILTER_XT_TARGET_TRACE) |
Jan Engelhardt | a1ff4ac | 2009-04-15 21:28:39 +0200 | [diff] [blame] | 354 | /* The packet is traced: log it */ |
| 355 | if (unlikely(skb->nf_trace)) |
Eric W. Biederman | 9dff2c9 | 2015-09-15 20:04:17 -0500 | [diff] [blame] | 356 | trace_packet(state->net, skb, hook, state->in, |
| 357 | state->out, table->name, private, e); |
Jozsef Kadlecsik | ba9dda3 | 2007-07-07 22:21:23 -0700 | [diff] [blame] | 358 | #endif |
Jan Engelhardt | a1ff4ac | 2009-04-15 21:28:39 +0200 | [diff] [blame] | 359 | /* Standard target? */ |
| 360 | if (!t->u.kernel.target->target) { |
| 361 | int v; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 362 | |
Jan Engelhardt | 87a2e70d | 2010-10-13 16:11:22 +0200 | [diff] [blame] | 363 | v = ((struct xt_standard_target *)t)->verdict; |
Jan Engelhardt | a1ff4ac | 2009-04-15 21:28:39 +0200 | [diff] [blame] | 364 | if (v < 0) { |
| 365 | /* Pop from stack? */ |
Jan Engelhardt | 243bf6e | 2010-10-13 16:28:00 +0200 | [diff] [blame] | 366 | if (v != XT_RETURN) { |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 367 | verdict = (unsigned int)(-v) - 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 368 | break; |
Jan Engelhardt | a1ff4ac | 2009-04-15 21:28:39 +0200 | [diff] [blame] | 369 | } |
Florian Westphal | 7814b6e | 2015-07-14 17:51:08 +0200 | [diff] [blame] | 370 | if (stackidx == 0) |
Jan Engelhardt | f3c5c1b | 2010-04-19 16:05:10 +0200 | [diff] [blame] | 371 | e = get_entry(table_base, |
| 372 | private->underflow[hook]); |
| 373 | else |
Florian Westphal | 7814b6e | 2015-07-14 17:51:08 +0200 | [diff] [blame] | 374 | e = ip6t_next_entry(jumpstack[--stackidx]); |
Jan Engelhardt | a1ff4ac | 2009-04-15 21:28:39 +0200 | [diff] [blame] | 375 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | } |
Joe Perches | 3666ed1 | 2009-11-23 23:17:06 +0100 | [diff] [blame] | 377 | if (table_base + v != ip6t_next_entry(e) && |
| 378 | !(e->ipv6.flags & IP6T_F_GOTO)) { |
Florian Westphal | 7814b6e | 2015-07-14 17:51:08 +0200 | [diff] [blame] | 379 | jumpstack[stackidx++] = e; |
Jan Engelhardt | a1ff4ac | 2009-04-15 21:28:39 +0200 | [diff] [blame] | 380 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 381 | |
Jan Engelhardt | a1ff4ac | 2009-04-15 21:28:39 +0200 | [diff] [blame] | 382 | e = get_entry(table_base, v); |
Jan Engelhardt | 7a6b1c4 | 2009-04-15 21:35:33 +0200 | [diff] [blame] | 383 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | } |
Jan Engelhardt | 7a6b1c4 | 2009-04-15 21:35:33 +0200 | [diff] [blame] | 385 | |
Jan Engelhardt | de74c16 | 2009-07-05 18:26:37 +0200 | [diff] [blame] | 386 | acpar.target = t->u.kernel.target; |
| 387 | acpar.targinfo = t->data; |
Jan Engelhardt | 7a6b1c4 | 2009-04-15 21:35:33 +0200 | [diff] [blame] | 388 | |
Jan Engelhardt | de74c16 | 2009-07-05 18:26:37 +0200 | [diff] [blame] | 389 | verdict = t->u.kernel.target->target(skb, &acpar); |
Jan Engelhardt | 243bf6e | 2010-10-13 16:28:00 +0200 | [diff] [blame] | 390 | if (verdict == XT_CONTINUE) |
Jan Engelhardt | 7a6b1c4 | 2009-04-15 21:35:33 +0200 | [diff] [blame] | 391 | e = ip6t_next_entry(e); |
| 392 | else |
| 393 | /* Verdict */ |
| 394 | break; |
Jan Engelhardt | b4ba261 | 2009-07-07 20:54:30 +0200 | [diff] [blame] | 395 | } while (!acpar.hotdrop); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 396 | |
Ian Morris | 7695495 | 2015-10-11 17:32:16 +0100 | [diff] [blame] | 397 | xt_write_recseq_end(addend); |
| 398 | local_bh_enable(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 399 | |
Jan Engelhardt | b4ba261 | 2009-07-07 20:54:30 +0200 | [diff] [blame] | 400 | if (acpar.hotdrop) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | return NF_DROP; |
| 402 | else return verdict; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 403 | } |
| 404 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | /* Figures out from what hook each rule can be called: returns 0 if |
Florian Westphal | 98dbbfc | 2015-08-26 23:20:51 +0200 | [diff] [blame] | 406 | there are loops. Puts hook bitmask in comefrom. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | static int |
Florian Westphal | 98dbbfc | 2015-08-26 23:20:51 +0200 | [diff] [blame] | 408 | mark_source_chains(const struct xt_table_info *newinfo, |
Florian Westphal | f4dc777 | 2016-07-14 17:51:26 +0200 | [diff] [blame] | 409 | unsigned int valid_hooks, void *entry0, |
| 410 | unsigned int *offsets) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | { |
| 412 | unsigned int hook; |
| 413 | |
| 414 | /* No recursion; use packet counter to save back ptrs (reset |
| 415 | to 0 as we leave), and comefrom to save source hook bitmask */ |
Patrick McHardy | 6e23ae2 | 2007-11-19 18:53:30 -0800 | [diff] [blame] | 416 | for (hook = 0; hook < NF_INET_NUMHOOKS; hook++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | unsigned int pos = newinfo->hook_entry[hook]; |
Patrick McHardy | 9c54795 | 2007-12-17 21:52:00 -0800 | [diff] [blame] | 418 | struct ip6t_entry *e = (struct ip6t_entry *)(entry0 + pos); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 419 | |
| 420 | if (!(valid_hooks & (1 << hook))) |
| 421 | continue; |
| 422 | |
| 423 | /* Set initial back pointer. */ |
| 424 | e->counters.pcnt = pos; |
| 425 | |
| 426 | for (;;) { |
Jan Engelhardt | 87a2e70d | 2010-10-13 16:11:22 +0200 | [diff] [blame] | 427 | const struct xt_standard_target *t |
Jan Engelhardt | d5d1baa | 2009-06-26 07:51:59 +0200 | [diff] [blame] | 428 | = (void *)ip6t_get_target_c(e); |
Patrick McHardy | 9c54795 | 2007-12-17 21:52:00 -0800 | [diff] [blame] | 429 | int visited = e->comefrom & (1 << hook); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | |
Pablo Neira Ayuso | d7cdf81 | 2016-05-03 13:54:23 +0200 | [diff] [blame] | 431 | if (e->comefrom & (1 << NF_INET_NUMHOOKS)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 432 | return 0; |
Pablo Neira Ayuso | d7cdf81 | 2016-05-03 13:54:23 +0200 | [diff] [blame] | 433 | |
Patrick McHardy | 9c54795 | 2007-12-17 21:52:00 -0800 | [diff] [blame] | 434 | e->comefrom |= ((1 << hook) | (1 << NF_INET_NUMHOOKS)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | |
| 436 | /* Unconditional return/END. */ |
Florian Westphal | 54d83fc | 2016-03-22 18:02:52 +0100 | [diff] [blame] | 437 | if ((unconditional(e) && |
Joe Perches | 3666ed1 | 2009-11-23 23:17:06 +0100 | [diff] [blame] | 438 | (strcmp(t->target.u.user.name, |
Jan Engelhardt | 243bf6e | 2010-10-13 16:28:00 +0200 | [diff] [blame] | 439 | XT_STANDARD_TARGET) == 0) && |
Florian Westphal | 54d83fc | 2016-03-22 18:02:52 +0100 | [diff] [blame] | 440 | t->verdict < 0) || visited) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 441 | unsigned int oldpos, size; |
| 442 | |
Patrick McHardy | 1f9352a | 2009-03-25 19:26:35 +0100 | [diff] [blame] | 443 | if ((strcmp(t->target.u.user.name, |
Jan Engelhardt | 243bf6e | 2010-10-13 16:28:00 +0200 | [diff] [blame] | 444 | XT_STANDARD_TARGET) == 0) && |
Pablo Neira Ayuso | d7cdf81 | 2016-05-03 13:54:23 +0200 | [diff] [blame] | 445 | t->verdict < -NF_MAX_VERDICT - 1) |
Dmitry Mishin | 74c9c0c | 2006-12-05 13:43:50 -0800 | [diff] [blame] | 446 | return 0; |
Dmitry Mishin | 74c9c0c | 2006-12-05 13:43:50 -0800 | [diff] [blame] | 447 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | /* Return: backtrack through the last |
| 449 | big jump. */ |
| 450 | do { |
Patrick McHardy | 6e23ae2 | 2007-11-19 18:53:30 -0800 | [diff] [blame] | 451 | e->comefrom ^= (1<<NF_INET_NUMHOOKS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | oldpos = pos; |
| 453 | pos = e->counters.pcnt; |
| 454 | e->counters.pcnt = 0; |
| 455 | |
| 456 | /* We're at the start. */ |
| 457 | if (pos == oldpos) |
| 458 | goto next; |
| 459 | |
| 460 | e = (struct ip6t_entry *) |
Eric Dumazet | 3183606 | 2005-12-13 23:13:48 -0800 | [diff] [blame] | 461 | (entry0 + pos); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 462 | } while (oldpos == pos + e->next_offset); |
| 463 | |
| 464 | /* Move along one */ |
| 465 | size = e->next_offset; |
| 466 | e = (struct ip6t_entry *) |
Eric Dumazet | 3183606 | 2005-12-13 23:13:48 -0800 | [diff] [blame] | 467 | (entry0 + pos + size); |
Florian Westphal | f24e230 | 2016-04-01 14:17:21 +0200 | [diff] [blame] | 468 | if (pos + size >= newinfo->size) |
| 469 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 470 | e->counters.pcnt = pos; |
| 471 | pos += size; |
| 472 | } else { |
| 473 | int newpos = t->verdict; |
| 474 | |
| 475 | if (strcmp(t->target.u.user.name, |
Jan Engelhardt | 243bf6e | 2010-10-13 16:28:00 +0200 | [diff] [blame] | 476 | XT_STANDARD_TARGET) == 0 && |
Joe Perches | 3666ed1 | 2009-11-23 23:17:06 +0100 | [diff] [blame] | 477 | newpos >= 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 478 | /* This a jump; chase it. */ |
Florian Westphal | f4dc777 | 2016-07-14 17:51:26 +0200 | [diff] [blame] | 479 | if (!xt_find_jump_offset(offsets, newpos, |
| 480 | newinfo->number)) |
| 481 | return 0; |
Florian Westphal | 3647234 | 2016-04-01 14:17:22 +0200 | [diff] [blame] | 482 | e = (struct ip6t_entry *) |
| 483 | (entry0 + newpos); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 484 | } else { |
| 485 | /* ... this is a fallthru */ |
| 486 | newpos = pos + e->next_offset; |
Florian Westphal | f24e230 | 2016-04-01 14:17:21 +0200 | [diff] [blame] | 487 | if (newpos >= newinfo->size) |
| 488 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 489 | } |
| 490 | e = (struct ip6t_entry *) |
Eric Dumazet | 3183606 | 2005-12-13 23:13:48 -0800 | [diff] [blame] | 491 | (entry0 + newpos); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 492 | e->counters.pcnt = pos; |
| 493 | pos = newpos; |
| 494 | } |
| 495 | } |
Pablo Neira Ayuso | d7cdf81 | 2016-05-03 13:54:23 +0200 | [diff] [blame] | 496 | next: ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 497 | } |
| 498 | return 1; |
| 499 | } |
| 500 | |
Jan Engelhardt | 87a2e70d | 2010-10-13 16:11:22 +0200 | [diff] [blame] | 501 | static void cleanup_match(struct xt_entry_match *m, struct net *net) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | { |
Jan Engelhardt | 6be3d85 | 2008-10-08 11:35:19 +0200 | [diff] [blame] | 503 | struct xt_mtdtor_param par; |
| 504 | |
Alexey Dobriyan | f54e936 | 2010-01-18 08:25:47 +0100 | [diff] [blame] | 505 | par.net = net; |
Jan Engelhardt | 6be3d85 | 2008-10-08 11:35:19 +0200 | [diff] [blame] | 506 | par.match = m->u.kernel.match; |
| 507 | par.matchinfo = m->data; |
Jan Engelhardt | 916a917 | 2008-10-08 11:35:20 +0200 | [diff] [blame] | 508 | par.family = NFPROTO_IPV6; |
Jan Engelhardt | 6be3d85 | 2008-10-08 11:35:19 +0200 | [diff] [blame] | 509 | if (par.match->destroy != NULL) |
| 510 | par.match->destroy(&par); |
| 511 | module_put(par.match->me); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | } |
| 513 | |
Jan Engelhardt | 87a2e70d | 2010-10-13 16:11:22 +0200 | [diff] [blame] | 514 | static int check_match(struct xt_entry_match *m, struct xt_mtchk_param *par) |
Patrick McHardy | f173c8a | 2007-12-17 21:48:17 -0800 | [diff] [blame] | 515 | { |
Jan Engelhardt | 9b4fce7 | 2008-10-08 11:35:18 +0200 | [diff] [blame] | 516 | const struct ip6t_ip6 *ipv6 = par->entryinfo; |
Patrick McHardy | f173c8a | 2007-12-17 21:48:17 -0800 | [diff] [blame] | 517 | |
Jan Engelhardt | 9b4fce7 | 2008-10-08 11:35:18 +0200 | [diff] [blame] | 518 | par->match = m->u.kernel.match; |
| 519 | par->matchinfo = m->data; |
| 520 | |
Pablo Neira Ayuso | d7cdf81 | 2016-05-03 13:54:23 +0200 | [diff] [blame] | 521 | return xt_check_match(par, m->u.match_size - sizeof(*m), |
| 522 | ipv6->proto, ipv6->invflags & IP6T_INV_PROTO); |
Patrick McHardy | f173c8a | 2007-12-17 21:48:17 -0800 | [diff] [blame] | 523 | } |
| 524 | |
Denys Vlasenko | 022748a | 2008-01-14 23:44:05 -0800 | [diff] [blame] | 525 | static int |
Jan Engelhardt | 87a2e70d | 2010-10-13 16:11:22 +0200 | [diff] [blame] | 526 | find_check_match(struct xt_entry_match *m, struct xt_mtchk_param *par) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 527 | { |
Jan Engelhardt | 6709dbb | 2007-02-07 15:11:19 -0800 | [diff] [blame] | 528 | struct xt_match *match; |
Patrick McHardy | 3cdc7c9 | 2006-03-20 18:00:36 -0800 | [diff] [blame] | 529 | int ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 530 | |
Jan Engelhardt | fd0ec0e | 2009-07-10 19:27:47 +0200 | [diff] [blame] | 531 | match = xt_request_find_match(NFPROTO_IPV6, m->u.user.name, |
| 532 | m->u.user.revision); |
Pablo Neira Ayuso | d7cdf81 | 2016-05-03 13:54:23 +0200 | [diff] [blame] | 533 | if (IS_ERR(match)) |
Jan Engelhardt | fd0ec0e | 2009-07-10 19:27:47 +0200 | [diff] [blame] | 534 | return PTR_ERR(match); |
Pablo Neira Ayuso | d7cdf81 | 2016-05-03 13:54:23 +0200 | [diff] [blame] | 535 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | m->u.kernel.match = match; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 537 | |
Jan Engelhardt | 6bdb331 | 2010-02-24 18:35:37 +0100 | [diff] [blame] | 538 | ret = check_match(m, par); |
Patrick McHardy | 3cdc7c9 | 2006-03-20 18:00:36 -0800 | [diff] [blame] | 539 | if (ret) |
| 540 | goto err; |
| 541 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 542 | return 0; |
Patrick McHardy | 3cdc7c9 | 2006-03-20 18:00:36 -0800 | [diff] [blame] | 543 | err: |
| 544 | module_put(m->u.kernel.match->me); |
| 545 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 546 | } |
| 547 | |
Patrick McHardy | add6746 | 2010-02-03 13:45:12 +0100 | [diff] [blame] | 548 | static int check_target(struct ip6t_entry *e, struct net *net, const char *name) |
Patrick McHardy | f173c8a | 2007-12-17 21:48:17 -0800 | [diff] [blame] | 549 | { |
Jan Engelhardt | 87a2e70d | 2010-10-13 16:11:22 +0200 | [diff] [blame] | 550 | struct xt_entry_target *t = ip6t_get_target(e); |
Jan Engelhardt | af5d6dc | 2008-10-08 11:35:19 +0200 | [diff] [blame] | 551 | struct xt_tgchk_param par = { |
Patrick McHardy | add6746 | 2010-02-03 13:45:12 +0100 | [diff] [blame] | 552 | .net = net, |
Jan Engelhardt | af5d6dc | 2008-10-08 11:35:19 +0200 | [diff] [blame] | 553 | .table = name, |
| 554 | .entryinfo = e, |
| 555 | .target = t->u.kernel.target, |
| 556 | .targinfo = t->data, |
| 557 | .hook_mask = e->comefrom, |
Jan Engelhardt | 916a917 | 2008-10-08 11:35:20 +0200 | [diff] [blame] | 558 | .family = NFPROTO_IPV6, |
Jan Engelhardt | af5d6dc | 2008-10-08 11:35:19 +0200 | [diff] [blame] | 559 | }; |
Patrick McHardy | f173c8a | 2007-12-17 21:48:17 -0800 | [diff] [blame] | 560 | |
| 561 | t = ip6t_get_target(e); |
Pablo Neira Ayuso | d7cdf81 | 2016-05-03 13:54:23 +0200 | [diff] [blame] | 562 | return xt_check_target(&par, t->u.target_size - sizeof(*t), |
| 563 | e->ipv6.proto, |
| 564 | e->ipv6.invflags & IP6T_INV_PROTO); |
Patrick McHardy | f173c8a | 2007-12-17 21:48:17 -0800 | [diff] [blame] | 565 | } |
| 566 | |
Denys Vlasenko | 022748a | 2008-01-14 23:44:05 -0800 | [diff] [blame] | 567 | static int |
Alexey Dobriyan | a83d8e8 | 2010-01-18 08:21:13 +0100 | [diff] [blame] | 568 | find_check_entry(struct ip6t_entry *e, struct net *net, const char *name, |
Jan Engelhardt | 0559518 | 2010-02-24 18:33:43 +0100 | [diff] [blame] | 569 | unsigned int size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 570 | { |
Jan Engelhardt | 87a2e70d | 2010-10-13 16:11:22 +0200 | [diff] [blame] | 571 | struct xt_entry_target *t; |
Jan Engelhardt | 6709dbb | 2007-02-07 15:11:19 -0800 | [diff] [blame] | 572 | struct xt_target *target; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 573 | int ret; |
| 574 | unsigned int j; |
Jan Engelhardt | 9b4fce7 | 2008-10-08 11:35:18 +0200 | [diff] [blame] | 575 | struct xt_mtchk_param mtpar; |
Jan Engelhardt | dcea992 | 2010-02-24 18:34:48 +0100 | [diff] [blame] | 576 | struct xt_entry_match *ematch; |
Pablo Neira Ayuso | 92b4423 | 2016-04-29 10:39:34 +0200 | [diff] [blame] | 577 | unsigned long pcnt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 578 | |
Pablo Neira Ayuso | 92b4423 | 2016-04-29 10:39:34 +0200 | [diff] [blame] | 579 | pcnt = xt_percpu_counter_alloc(); |
| 580 | if (IS_ERR_VALUE(pcnt)) |
Florian Westphal | 71ae0df | 2015-06-11 01:34:54 +0200 | [diff] [blame] | 581 | return -ENOMEM; |
Pablo Neira Ayuso | 92b4423 | 2016-04-29 10:39:34 +0200 | [diff] [blame] | 582 | e->counters.pcnt = pcnt; |
Florian Westphal | 71ae0df | 2015-06-11 01:34:54 +0200 | [diff] [blame] | 583 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 584 | j = 0; |
Alexey Dobriyan | a83d8e8 | 2010-01-18 08:21:13 +0100 | [diff] [blame] | 585 | mtpar.net = net; |
Jan Engelhardt | 9b4fce7 | 2008-10-08 11:35:18 +0200 | [diff] [blame] | 586 | mtpar.table = name; |
| 587 | mtpar.entryinfo = &e->ipv6; |
| 588 | mtpar.hook_mask = e->comefrom; |
Jan Engelhardt | 916a917 | 2008-10-08 11:35:20 +0200 | [diff] [blame] | 589 | mtpar.family = NFPROTO_IPV6; |
Jan Engelhardt | dcea992 | 2010-02-24 18:34:48 +0100 | [diff] [blame] | 590 | xt_ematch_foreach(ematch, e) { |
Jan Engelhardt | 6bdb331 | 2010-02-24 18:35:37 +0100 | [diff] [blame] | 591 | ret = find_check_match(ematch, &mtpar); |
Jan Engelhardt | dcea992 | 2010-02-24 18:34:48 +0100 | [diff] [blame] | 592 | if (ret != 0) |
Jan Engelhardt | 6bdb331 | 2010-02-24 18:35:37 +0100 | [diff] [blame] | 593 | goto cleanup_matches; |
| 594 | ++j; |
Jan Engelhardt | dcea992 | 2010-02-24 18:34:48 +0100 | [diff] [blame] | 595 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 596 | |
| 597 | t = ip6t_get_target(e); |
Jan Engelhardt | d2a7b6b | 2009-07-10 18:55:11 +0200 | [diff] [blame] | 598 | target = xt_request_find_target(NFPROTO_IPV6, t->u.user.name, |
| 599 | t->u.user.revision); |
| 600 | if (IS_ERR(target)) { |
Jan Engelhardt | d2a7b6b | 2009-07-10 18:55:11 +0200 | [diff] [blame] | 601 | ret = PTR_ERR(target); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 602 | goto cleanup_matches; |
| 603 | } |
| 604 | t->u.kernel.target = target; |
Harald Welte | 6b7d31f | 2005-10-26 09:34:24 +0200 | [diff] [blame] | 605 | |
Patrick McHardy | add6746 | 2010-02-03 13:45:12 +0100 | [diff] [blame] | 606 | ret = check_target(e, net, name); |
Patrick McHardy | 3cdc7c9 | 2006-03-20 18:00:36 -0800 | [diff] [blame] | 607 | if (ret) |
| 608 | goto err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 609 | return 0; |
Patrick McHardy | 3cdc7c9 | 2006-03-20 18:00:36 -0800 | [diff] [blame] | 610 | err: |
| 611 | module_put(t->u.kernel.target->me); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 612 | cleanup_matches: |
Jan Engelhardt | 6bdb331 | 2010-02-24 18:35:37 +0100 | [diff] [blame] | 613 | xt_ematch_foreach(ematch, e) { |
| 614 | if (j-- == 0) |
Jan Engelhardt | dcea992 | 2010-02-24 18:34:48 +0100 | [diff] [blame] | 615 | break; |
Jan Engelhardt | 6bdb331 | 2010-02-24 18:35:37 +0100 | [diff] [blame] | 616 | cleanup_match(ematch, net); |
| 617 | } |
Florian Westphal | 71ae0df | 2015-06-11 01:34:54 +0200 | [diff] [blame] | 618 | |
| 619 | xt_percpu_counter_free(e->counters.pcnt); |
| 620 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 621 | return ret; |
| 622 | } |
| 623 | |
Jan Engelhardt | d5d1baa | 2009-06-26 07:51:59 +0200 | [diff] [blame] | 624 | static bool check_underflow(const struct ip6t_entry *e) |
Jan Engelhardt | e2fe35c | 2009-07-18 15:22:30 +0200 | [diff] [blame] | 625 | { |
Jan Engelhardt | 87a2e70d | 2010-10-13 16:11:22 +0200 | [diff] [blame] | 626 | const struct xt_entry_target *t; |
Jan Engelhardt | e2fe35c | 2009-07-18 15:22:30 +0200 | [diff] [blame] | 627 | unsigned int verdict; |
| 628 | |
Florian Westphal | 54d83fc | 2016-03-22 18:02:52 +0100 | [diff] [blame] | 629 | if (!unconditional(e)) |
Jan Engelhardt | e2fe35c | 2009-07-18 15:22:30 +0200 | [diff] [blame] | 630 | return false; |
Jan Engelhardt | d5d1baa | 2009-06-26 07:51:59 +0200 | [diff] [blame] | 631 | t = ip6t_get_target_c(e); |
Jan Engelhardt | e2fe35c | 2009-07-18 15:22:30 +0200 | [diff] [blame] | 632 | if (strcmp(t->u.user.name, XT_STANDARD_TARGET) != 0) |
| 633 | return false; |
Jan Engelhardt | 87a2e70d | 2010-10-13 16:11:22 +0200 | [diff] [blame] | 634 | verdict = ((struct xt_standard_target *)t)->verdict; |
Jan Engelhardt | e2fe35c | 2009-07-18 15:22:30 +0200 | [diff] [blame] | 635 | verdict = -verdict - 1; |
| 636 | return verdict == NF_DROP || verdict == NF_ACCEPT; |
| 637 | } |
| 638 | |
Denys Vlasenko | 022748a | 2008-01-14 23:44:05 -0800 | [diff] [blame] | 639 | static int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 640 | check_entry_size_and_hooks(struct ip6t_entry *e, |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 641 | struct xt_table_info *newinfo, |
Jan Engelhardt | d5d1baa | 2009-06-26 07:51:59 +0200 | [diff] [blame] | 642 | const unsigned char *base, |
| 643 | const unsigned char *limit, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 644 | const unsigned int *hook_entries, |
| 645 | const unsigned int *underflows, |
Jan Engelhardt | 0559518 | 2010-02-24 18:33:43 +0100 | [diff] [blame] | 646 | unsigned int valid_hooks) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 647 | { |
| 648 | unsigned int h; |
Florian Westphal | bdf533d | 2016-03-22 18:02:49 +0100 | [diff] [blame] | 649 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 650 | |
Joe Perches | 3666ed1 | 2009-11-23 23:17:06 +0100 | [diff] [blame] | 651 | if ((unsigned long)e % __alignof__(struct ip6t_entry) != 0 || |
Florian Westphal | 6e94e0c | 2016-03-22 18:02:50 +0100 | [diff] [blame] | 652 | (unsigned char *)e + sizeof(struct ip6t_entry) >= limit || |
Pablo Neira Ayuso | d7cdf81 | 2016-05-03 13:54:23 +0200 | [diff] [blame] | 653 | (unsigned char *)e + e->next_offset > limit) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 654 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 655 | |
| 656 | if (e->next_offset |
Pablo Neira Ayuso | d7cdf81 | 2016-05-03 13:54:23 +0200 | [diff] [blame] | 657 | < sizeof(struct ip6t_entry) + sizeof(struct xt_entry_target)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 658 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 659 | |
Florian Westphal | aa412ba | 2016-04-01 14:17:24 +0200 | [diff] [blame] | 660 | if (!ip6_checkentry(&e->ipv6)) |
| 661 | return -EINVAL; |
| 662 | |
Florian Westphal | ce683e5 | 2016-04-01 14:17:28 +0200 | [diff] [blame] | 663 | err = xt_check_entry_offsets(e, e->elems, e->target_offset, |
| 664 | e->next_offset); |
Florian Westphal | bdf533d | 2016-03-22 18:02:49 +0100 | [diff] [blame] | 665 | if (err) |
| 666 | return err; |
| 667 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 668 | /* Check hooks & underflows */ |
Patrick McHardy | 6e23ae2 | 2007-11-19 18:53:30 -0800 | [diff] [blame] | 669 | for (h = 0; h < NF_INET_NUMHOOKS; h++) { |
Jan Engelhardt | a7d5173 | 2009-07-18 14:52:58 +0200 | [diff] [blame] | 670 | if (!(valid_hooks & (1 << h))) |
| 671 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 672 | if ((unsigned char *)e - base == hook_entries[h]) |
| 673 | newinfo->hook_entry[h] = hook_entries[h]; |
Jan Engelhardt | 90e7d4a | 2009-07-09 22:54:53 +0200 | [diff] [blame] | 674 | if ((unsigned char *)e - base == underflows[h]) { |
Pablo Neira Ayuso | d7cdf81 | 2016-05-03 13:54:23 +0200 | [diff] [blame] | 675 | if (!check_underflow(e)) |
Jan Engelhardt | 90e7d4a | 2009-07-09 22:54:53 +0200 | [diff] [blame] | 676 | return -EINVAL; |
Pablo Neira Ayuso | d7cdf81 | 2016-05-03 13:54:23 +0200 | [diff] [blame] | 677 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 678 | newinfo->underflow[h] = underflows[h]; |
Jan Engelhardt | 90e7d4a | 2009-07-09 22:54:53 +0200 | [diff] [blame] | 679 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 680 | } |
| 681 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 682 | /* Clear counters and comefrom */ |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 683 | e->counters = ((struct xt_counters) { 0, 0 }); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 684 | e->comefrom = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 685 | return 0; |
| 686 | } |
| 687 | |
Jan Engelhardt | 0559518 | 2010-02-24 18:33:43 +0100 | [diff] [blame] | 688 | static void cleanup_entry(struct ip6t_entry *e, struct net *net) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 689 | { |
Jan Engelhardt | a2df164 | 2008-10-08 11:35:19 +0200 | [diff] [blame] | 690 | struct xt_tgdtor_param par; |
Jan Engelhardt | 87a2e70d | 2010-10-13 16:11:22 +0200 | [diff] [blame] | 691 | struct xt_entry_target *t; |
Jan Engelhardt | dcea992 | 2010-02-24 18:34:48 +0100 | [diff] [blame] | 692 | struct xt_entry_match *ematch; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 693 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 694 | /* Cleanup all matches */ |
Jan Engelhardt | dcea992 | 2010-02-24 18:34:48 +0100 | [diff] [blame] | 695 | xt_ematch_foreach(ematch, e) |
Jan Engelhardt | 6bdb331 | 2010-02-24 18:35:37 +0100 | [diff] [blame] | 696 | cleanup_match(ematch, net); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 697 | t = ip6t_get_target(e); |
Jan Engelhardt | a2df164 | 2008-10-08 11:35:19 +0200 | [diff] [blame] | 698 | |
Patrick McHardy | add6746 | 2010-02-03 13:45:12 +0100 | [diff] [blame] | 699 | par.net = net; |
Jan Engelhardt | a2df164 | 2008-10-08 11:35:19 +0200 | [diff] [blame] | 700 | par.target = t->u.kernel.target; |
| 701 | par.targinfo = t->data; |
Jan Engelhardt | 916a917 | 2008-10-08 11:35:20 +0200 | [diff] [blame] | 702 | par.family = NFPROTO_IPV6; |
Jan Engelhardt | a2df164 | 2008-10-08 11:35:19 +0200 | [diff] [blame] | 703 | if (par.target->destroy != NULL) |
| 704 | par.target->destroy(&par); |
| 705 | module_put(par.target->me); |
Florian Westphal | 71ae0df | 2015-06-11 01:34:54 +0200 | [diff] [blame] | 706 | |
| 707 | xt_percpu_counter_free(e->counters.pcnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 708 | } |
| 709 | |
| 710 | /* Checks and translates the user-supplied table segment (held in |
| 711 | newinfo) */ |
| 712 | static int |
Jan Engelhardt | 0f23421 | 2010-02-24 18:36:04 +0100 | [diff] [blame] | 713 | translate_table(struct net *net, struct xt_table_info *newinfo, void *entry0, |
Ian Morris | cda219c | 2015-10-11 17:32:15 +0100 | [diff] [blame] | 714 | const struct ip6t_replace *repl) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 715 | { |
Jan Engelhardt | 72b2b1d | 2010-02-24 18:32:59 +0100 | [diff] [blame] | 716 | struct ip6t_entry *iter; |
Florian Westphal | f4dc777 | 2016-07-14 17:51:26 +0200 | [diff] [blame] | 717 | unsigned int *offsets; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 718 | unsigned int i; |
Jan Engelhardt | 72b2b1d | 2010-02-24 18:32:59 +0100 | [diff] [blame] | 719 | int ret = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 720 | |
Jan Engelhardt | 0f23421 | 2010-02-24 18:36:04 +0100 | [diff] [blame] | 721 | newinfo->size = repl->size; |
| 722 | newinfo->number = repl->num_entries; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 723 | |
| 724 | /* Init all hooks to impossible value. */ |
Patrick McHardy | 6e23ae2 | 2007-11-19 18:53:30 -0800 | [diff] [blame] | 725 | for (i = 0; i < NF_INET_NUMHOOKS; i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 726 | newinfo->hook_entry[i] = 0xFFFFFFFF; |
| 727 | newinfo->underflow[i] = 0xFFFFFFFF; |
| 728 | } |
| 729 | |
Florian Westphal | f4dc777 | 2016-07-14 17:51:26 +0200 | [diff] [blame] | 730 | offsets = xt_alloc_entry_offsets(newinfo->number); |
| 731 | if (!offsets) |
| 732 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 733 | i = 0; |
| 734 | /* Walk through entries, checking offsets. */ |
Jan Engelhardt | 72b2b1d | 2010-02-24 18:32:59 +0100 | [diff] [blame] | 735 | xt_entry_foreach(iter, entry0, newinfo->size) { |
| 736 | ret = check_entry_size_and_hooks(iter, newinfo, entry0, |
Jan Engelhardt | 6b4ff2d | 2010-02-26 17:53:31 +0100 | [diff] [blame] | 737 | entry0 + repl->size, |
| 738 | repl->hook_entry, |
| 739 | repl->underflow, |
| 740 | repl->valid_hooks); |
Jan Engelhardt | 72b2b1d | 2010-02-24 18:32:59 +0100 | [diff] [blame] | 741 | if (ret != 0) |
Florian Westphal | f4dc777 | 2016-07-14 17:51:26 +0200 | [diff] [blame] | 742 | goto out_free; |
| 743 | if (i < repl->num_entries) |
| 744 | offsets[i] = (void *)iter - entry0; |
Jan Engelhardt | 0559518 | 2010-02-24 18:33:43 +0100 | [diff] [blame] | 745 | ++i; |
Florian Westphal | 98dbbfc | 2015-08-26 23:20:51 +0200 | [diff] [blame] | 746 | if (strcmp(ip6t_get_target(iter)->u.user.name, |
| 747 | XT_ERROR_TARGET) == 0) |
| 748 | ++newinfo->stacksize; |
Jan Engelhardt | 72b2b1d | 2010-02-24 18:32:59 +0100 | [diff] [blame] | 749 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 750 | |
Florian Westphal | f4dc777 | 2016-07-14 17:51:26 +0200 | [diff] [blame] | 751 | ret = -EINVAL; |
Pablo Neira Ayuso | d7cdf81 | 2016-05-03 13:54:23 +0200 | [diff] [blame] | 752 | if (i != repl->num_entries) |
Florian Westphal | f4dc777 | 2016-07-14 17:51:26 +0200 | [diff] [blame] | 753 | goto out_free; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 754 | |
| 755 | /* Check hooks all assigned */ |
Patrick McHardy | 6e23ae2 | 2007-11-19 18:53:30 -0800 | [diff] [blame] | 756 | for (i = 0; i < NF_INET_NUMHOOKS; i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 757 | /* Only hooks which are valid */ |
Jan Engelhardt | 0f23421 | 2010-02-24 18:36:04 +0100 | [diff] [blame] | 758 | if (!(repl->valid_hooks & (1 << i))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 759 | continue; |
Pablo Neira Ayuso | d7cdf81 | 2016-05-03 13:54:23 +0200 | [diff] [blame] | 760 | if (newinfo->hook_entry[i] == 0xFFFFFFFF) |
Florian Westphal | f4dc777 | 2016-07-14 17:51:26 +0200 | [diff] [blame] | 761 | goto out_free; |
Pablo Neira Ayuso | d7cdf81 | 2016-05-03 13:54:23 +0200 | [diff] [blame] | 762 | if (newinfo->underflow[i] == 0xFFFFFFFF) |
Florian Westphal | f4dc777 | 2016-07-14 17:51:26 +0200 | [diff] [blame] | 763 | goto out_free; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 764 | } |
| 765 | |
Florian Westphal | f4dc777 | 2016-07-14 17:51:26 +0200 | [diff] [blame] | 766 | if (!mark_source_chains(newinfo, repl->valid_hooks, entry0, offsets)) { |
| 767 | ret = -ELOOP; |
| 768 | goto out_free; |
| 769 | } |
| 770 | kvfree(offsets); |
Dmitry Mishin | 74c9c0c | 2006-12-05 13:43:50 -0800 | [diff] [blame] | 771 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 772 | /* Finally, each sanity check must pass */ |
| 773 | i = 0; |
Jan Engelhardt | 72b2b1d | 2010-02-24 18:32:59 +0100 | [diff] [blame] | 774 | xt_entry_foreach(iter, entry0, newinfo->size) { |
Jan Engelhardt | 0f23421 | 2010-02-24 18:36:04 +0100 | [diff] [blame] | 775 | ret = find_check_entry(iter, net, repl->name, repl->size); |
Jan Engelhardt | 72b2b1d | 2010-02-24 18:32:59 +0100 | [diff] [blame] | 776 | if (ret != 0) |
| 777 | break; |
Jan Engelhardt | 0559518 | 2010-02-24 18:33:43 +0100 | [diff] [blame] | 778 | ++i; |
Jan Engelhardt | 72b2b1d | 2010-02-24 18:32:59 +0100 | [diff] [blame] | 779 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 780 | |
Dmitry Mishin | 74c9c0c | 2006-12-05 13:43:50 -0800 | [diff] [blame] | 781 | if (ret != 0) { |
Jan Engelhardt | 0559518 | 2010-02-24 18:33:43 +0100 | [diff] [blame] | 782 | xt_entry_foreach(iter, entry0, newinfo->size) { |
| 783 | if (i-- == 0) |
Jan Engelhardt | 72b2b1d | 2010-02-24 18:32:59 +0100 | [diff] [blame] | 784 | break; |
Jan Engelhardt | 0559518 | 2010-02-24 18:33:43 +0100 | [diff] [blame] | 785 | cleanup_entry(iter, net); |
| 786 | } |
Dmitry Mishin | 74c9c0c | 2006-12-05 13:43:50 -0800 | [diff] [blame] | 787 | return ret; |
| 788 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 789 | |
Patrick McHardy | 9c54795 | 2007-12-17 21:52:00 -0800 | [diff] [blame] | 790 | return ret; |
Florian Westphal | f4dc777 | 2016-07-14 17:51:26 +0200 | [diff] [blame] | 791 | out_free: |
| 792 | kvfree(offsets); |
| 793 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 794 | } |
| 795 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 796 | static void |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 797 | get_counters(const struct xt_table_info *t, |
| 798 | struct xt_counters counters[]) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 799 | { |
Jan Engelhardt | 72b2b1d | 2010-02-24 18:32:59 +0100 | [diff] [blame] | 800 | struct ip6t_entry *iter; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 801 | unsigned int cpu; |
| 802 | unsigned int i; |
| 803 | |
KAMEZAWA Hiroyuki | 6f91204 | 2006-04-10 22:52:50 -0700 | [diff] [blame] | 804 | for_each_possible_cpu(cpu) { |
Eric Dumazet | 7f5c6d4 | 2011-04-04 17:04:03 +0200 | [diff] [blame] | 805 | seqcount_t *s = &per_cpu(xt_recseq, cpu); |
Eric Dumazet | 83723d6 | 2011-01-10 20:11:38 +0100 | [diff] [blame] | 806 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 807 | i = 0; |
Florian Westphal | 482cfc3 | 2015-06-11 01:34:55 +0200 | [diff] [blame] | 808 | xt_entry_foreach(iter, t->entries, t->size) { |
Florian Westphal | 71ae0df | 2015-06-11 01:34:54 +0200 | [diff] [blame] | 809 | struct xt_counters *tmp; |
Eric Dumazet | 83723d6 | 2011-01-10 20:11:38 +0100 | [diff] [blame] | 810 | u64 bcnt, pcnt; |
| 811 | unsigned int start; |
| 812 | |
Florian Westphal | 71ae0df | 2015-06-11 01:34:54 +0200 | [diff] [blame] | 813 | tmp = xt_get_per_cpu_counter(&iter->counters, cpu); |
Eric Dumazet | 83723d6 | 2011-01-10 20:11:38 +0100 | [diff] [blame] | 814 | do { |
Eric Dumazet | 7f5c6d4 | 2011-04-04 17:04:03 +0200 | [diff] [blame] | 815 | start = read_seqcount_begin(s); |
Florian Westphal | 71ae0df | 2015-06-11 01:34:54 +0200 | [diff] [blame] | 816 | bcnt = tmp->bcnt; |
| 817 | pcnt = tmp->pcnt; |
Eric Dumazet | 7f5c6d4 | 2011-04-04 17:04:03 +0200 | [diff] [blame] | 818 | } while (read_seqcount_retry(s, start)); |
Eric Dumazet | 83723d6 | 2011-01-10 20:11:38 +0100 | [diff] [blame] | 819 | |
| 820 | ADD_COUNTER(counters[i], bcnt, pcnt); |
Jan Engelhardt | 0559518 | 2010-02-24 18:33:43 +0100 | [diff] [blame] | 821 | ++i; |
| 822 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 823 | } |
Stephen Hemminger | 7845447 | 2009-02-20 10:35:32 +0100 | [diff] [blame] | 824 | } |
| 825 | |
Jan Engelhardt | d5d1baa | 2009-06-26 07:51:59 +0200 | [diff] [blame] | 826 | static struct xt_counters *alloc_counters(const struct xt_table *table) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 827 | { |
Patrick McHardy | ed1a6f5 | 2007-12-17 21:49:51 -0800 | [diff] [blame] | 828 | unsigned int countersize; |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 829 | struct xt_counters *counters; |
Jan Engelhardt | d5d1baa | 2009-06-26 07:51:59 +0200 | [diff] [blame] | 830 | const struct xt_table_info *private = table->private; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 831 | |
| 832 | /* We need atomic snapshot of counters: rest doesn't change |
| 833 | (other than comefrom, which userspace doesn't care |
| 834 | about). */ |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 835 | countersize = sizeof(struct xt_counters) * private->number; |
Eric Dumazet | 83723d6 | 2011-01-10 20:11:38 +0100 | [diff] [blame] | 836 | counters = vzalloc(countersize); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 837 | |
| 838 | if (counters == NULL) |
Stephen Hemminger | 942e4a2 | 2009-04-28 22:36:33 -0700 | [diff] [blame] | 839 | return ERR_PTR(-ENOMEM); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 840 | |
Stephen Hemminger | 942e4a2 | 2009-04-28 22:36:33 -0700 | [diff] [blame] | 841 | get_counters(private, counters); |
Stephen Hemminger | 7845447 | 2009-02-20 10:35:32 +0100 | [diff] [blame] | 842 | |
Eric Dumazet | 49a88d1 | 2009-04-06 17:06:55 +0200 | [diff] [blame] | 843 | return counters; |
Patrick McHardy | ed1a6f5 | 2007-12-17 21:49:51 -0800 | [diff] [blame] | 844 | } |
| 845 | |
| 846 | static int |
| 847 | copy_entries_to_user(unsigned int total_size, |
Jan Engelhardt | d5d1baa | 2009-06-26 07:51:59 +0200 | [diff] [blame] | 848 | const struct xt_table *table, |
Patrick McHardy | ed1a6f5 | 2007-12-17 21:49:51 -0800 | [diff] [blame] | 849 | void __user *userptr) |
| 850 | { |
| 851 | unsigned int off, num; |
Jan Engelhardt | d5d1baa | 2009-06-26 07:51:59 +0200 | [diff] [blame] | 852 | const struct ip6t_entry *e; |
Patrick McHardy | ed1a6f5 | 2007-12-17 21:49:51 -0800 | [diff] [blame] | 853 | struct xt_counters *counters; |
Jan Engelhardt | 5452e42 | 2008-04-14 11:15:35 +0200 | [diff] [blame] | 854 | const struct xt_table_info *private = table->private; |
Patrick McHardy | ed1a6f5 | 2007-12-17 21:49:51 -0800 | [diff] [blame] | 855 | int ret = 0; |
Eric Dumazet | 711bdde | 2015-06-15 09:57:30 -0700 | [diff] [blame] | 856 | const void *loc_cpu_entry; |
Patrick McHardy | ed1a6f5 | 2007-12-17 21:49:51 -0800 | [diff] [blame] | 857 | |
| 858 | counters = alloc_counters(table); |
| 859 | if (IS_ERR(counters)) |
| 860 | return PTR_ERR(counters); |
| 861 | |
Florian Westphal | 482cfc3 | 2015-06-11 01:34:55 +0200 | [diff] [blame] | 862 | loc_cpu_entry = private->entries; |
Eric Dumazet | 3183606 | 2005-12-13 23:13:48 -0800 | [diff] [blame] | 863 | if (copy_to_user(userptr, loc_cpu_entry, total_size) != 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 864 | ret = -EFAULT; |
| 865 | goto free_counters; |
| 866 | } |
| 867 | |
| 868 | /* FIXME: use iterator macros --RR */ |
| 869 | /* ... then go back and fix counters and names */ |
| 870 | for (off = 0, num = 0; off < total_size; off += e->next_offset, num++){ |
| 871 | unsigned int i; |
Jan Engelhardt | 87a2e70d | 2010-10-13 16:11:22 +0200 | [diff] [blame] | 872 | const struct xt_entry_match *m; |
| 873 | const struct xt_entry_target *t; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 874 | |
Eric Dumazet | 3183606 | 2005-12-13 23:13:48 -0800 | [diff] [blame] | 875 | e = (struct ip6t_entry *)(loc_cpu_entry + off); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 876 | if (copy_to_user(userptr + off |
| 877 | + offsetof(struct ip6t_entry, counters), |
| 878 | &counters[num], |
| 879 | sizeof(counters[num])) != 0) { |
| 880 | ret = -EFAULT; |
| 881 | goto free_counters; |
| 882 | } |
| 883 | |
| 884 | for (i = sizeof(struct ip6t_entry); |
| 885 | i < e->target_offset; |
| 886 | i += m->u.match_size) { |
| 887 | m = (void *)e + i; |
| 888 | |
| 889 | if (copy_to_user(userptr + off + i |
Jan Engelhardt | 87a2e70d | 2010-10-13 16:11:22 +0200 | [diff] [blame] | 890 | + offsetof(struct xt_entry_match, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 891 | u.user.name), |
| 892 | m->u.kernel.match->name, |
| 893 | strlen(m->u.kernel.match->name)+1) |
| 894 | != 0) { |
| 895 | ret = -EFAULT; |
| 896 | goto free_counters; |
| 897 | } |
| 898 | } |
| 899 | |
Jan Engelhardt | d5d1baa | 2009-06-26 07:51:59 +0200 | [diff] [blame] | 900 | t = ip6t_get_target_c(e); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 901 | if (copy_to_user(userptr + off + e->target_offset |
Jan Engelhardt | 87a2e70d | 2010-10-13 16:11:22 +0200 | [diff] [blame] | 902 | + offsetof(struct xt_entry_target, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 903 | u.user.name), |
| 904 | t->u.kernel.target->name, |
| 905 | strlen(t->u.kernel.target->name)+1) != 0) { |
| 906 | ret = -EFAULT; |
| 907 | goto free_counters; |
| 908 | } |
| 909 | } |
| 910 | |
| 911 | free_counters: |
| 912 | vfree(counters); |
| 913 | return ret; |
| 914 | } |
| 915 | |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 916 | #ifdef CONFIG_COMPAT |
Jan Engelhardt | 739674f | 2009-06-26 08:23:19 +0200 | [diff] [blame] | 917 | static void compat_standard_from_user(void *dst, const void *src) |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 918 | { |
| 919 | int v = *(compat_int_t *)src; |
| 920 | |
| 921 | if (v > 0) |
| 922 | v += xt_compat_calc_jump(AF_INET6, v); |
| 923 | memcpy(dst, &v, sizeof(v)); |
| 924 | } |
| 925 | |
Jan Engelhardt | 739674f | 2009-06-26 08:23:19 +0200 | [diff] [blame] | 926 | static int compat_standard_to_user(void __user *dst, const void *src) |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 927 | { |
| 928 | compat_int_t cv = *(int *)src; |
| 929 | |
| 930 | if (cv > 0) |
| 931 | cv -= xt_compat_calc_jump(AF_INET6, cv); |
| 932 | return copy_to_user(dst, &cv, sizeof(cv)) ? -EFAULT : 0; |
| 933 | } |
| 934 | |
Jan Engelhardt | d5d1baa | 2009-06-26 07:51:59 +0200 | [diff] [blame] | 935 | static int compat_calc_entry(const struct ip6t_entry *e, |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 936 | const struct xt_table_info *info, |
Jan Engelhardt | d5d1baa | 2009-06-26 07:51:59 +0200 | [diff] [blame] | 937 | const void *base, struct xt_table_info *newinfo) |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 938 | { |
Jan Engelhardt | dcea992 | 2010-02-24 18:34:48 +0100 | [diff] [blame] | 939 | const struct xt_entry_match *ematch; |
Jan Engelhardt | 87a2e70d | 2010-10-13 16:11:22 +0200 | [diff] [blame] | 940 | const struct xt_entry_target *t; |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 941 | unsigned int entry_offset; |
| 942 | int off, i, ret; |
| 943 | |
| 944 | off = sizeof(struct ip6t_entry) - sizeof(struct compat_ip6t_entry); |
| 945 | entry_offset = (void *)e - base; |
Jan Engelhardt | dcea992 | 2010-02-24 18:34:48 +0100 | [diff] [blame] | 946 | xt_ematch_foreach(ematch, e) |
Jan Engelhardt | 6bdb331 | 2010-02-24 18:35:37 +0100 | [diff] [blame] | 947 | off += xt_compat_match_offset(ematch->u.kernel.match); |
Jan Engelhardt | d5d1baa | 2009-06-26 07:51:59 +0200 | [diff] [blame] | 948 | t = ip6t_get_target_c(e); |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 949 | off += xt_compat_target_offset(t->u.kernel.target); |
| 950 | newinfo->size -= off; |
| 951 | ret = xt_compat_add_offset(AF_INET6, entry_offset, off); |
| 952 | if (ret) |
| 953 | return ret; |
| 954 | |
| 955 | for (i = 0; i < NF_INET_NUMHOOKS; i++) { |
| 956 | if (info->hook_entry[i] && |
| 957 | (e < (struct ip6t_entry *)(base + info->hook_entry[i]))) |
| 958 | newinfo->hook_entry[i] -= off; |
| 959 | if (info->underflow[i] && |
| 960 | (e < (struct ip6t_entry *)(base + info->underflow[i]))) |
| 961 | newinfo->underflow[i] -= off; |
| 962 | } |
| 963 | return 0; |
| 964 | } |
| 965 | |
| 966 | static int compat_table_info(const struct xt_table_info *info, |
| 967 | struct xt_table_info *newinfo) |
| 968 | { |
Jan Engelhardt | 72b2b1d | 2010-02-24 18:32:59 +0100 | [diff] [blame] | 969 | struct ip6t_entry *iter; |
Eric Dumazet | 711bdde | 2015-06-15 09:57:30 -0700 | [diff] [blame] | 970 | const void *loc_cpu_entry; |
Jan Engelhardt | 0559518 | 2010-02-24 18:33:43 +0100 | [diff] [blame] | 971 | int ret; |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 972 | |
| 973 | if (!newinfo || !info) |
| 974 | return -EINVAL; |
| 975 | |
Florian Westphal | 482cfc3 | 2015-06-11 01:34:55 +0200 | [diff] [blame] | 976 | /* we dont care about newinfo->entries */ |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 977 | memcpy(newinfo, info, offsetof(struct xt_table_info, entries)); |
| 978 | newinfo->initial_entries = 0; |
Florian Westphal | 482cfc3 | 2015-06-11 01:34:55 +0200 | [diff] [blame] | 979 | loc_cpu_entry = info->entries; |
Eric Dumazet | 255d0dc | 2010-12-18 18:35:15 +0100 | [diff] [blame] | 980 | xt_compat_init_offsets(AF_INET6, info->number); |
Jan Engelhardt | 72b2b1d | 2010-02-24 18:32:59 +0100 | [diff] [blame] | 981 | xt_entry_foreach(iter, loc_cpu_entry, info->size) { |
| 982 | ret = compat_calc_entry(iter, info, loc_cpu_entry, newinfo); |
| 983 | if (ret != 0) |
Jan Engelhardt | 0559518 | 2010-02-24 18:33:43 +0100 | [diff] [blame] | 984 | return ret; |
Jan Engelhardt | 72b2b1d | 2010-02-24 18:32:59 +0100 | [diff] [blame] | 985 | } |
Jan Engelhardt | 0559518 | 2010-02-24 18:33:43 +0100 | [diff] [blame] | 986 | return 0; |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 987 | } |
| 988 | #endif |
| 989 | |
Jan Engelhardt | d5d1baa | 2009-06-26 07:51:59 +0200 | [diff] [blame] | 990 | static int get_info(struct net *net, void __user *user, |
Ian Morris | cda219c | 2015-10-11 17:32:15 +0100 | [diff] [blame] | 991 | const int *len, int compat) |
Patrick McHardy | 433665c | 2007-12-17 21:50:05 -0800 | [diff] [blame] | 992 | { |
Jan Engelhardt | 12b00c2 | 2010-10-13 15:56:56 +0200 | [diff] [blame] | 993 | char name[XT_TABLE_MAXNAMELEN]; |
Patrick McHardy | 433665c | 2007-12-17 21:50:05 -0800 | [diff] [blame] | 994 | struct xt_table *t; |
| 995 | int ret; |
| 996 | |
Pablo Neira Ayuso | d7cdf81 | 2016-05-03 13:54:23 +0200 | [diff] [blame] | 997 | if (*len != sizeof(struct ip6t_getinfo)) |
Patrick McHardy | 433665c | 2007-12-17 21:50:05 -0800 | [diff] [blame] | 998 | return -EINVAL; |
Patrick McHardy | 433665c | 2007-12-17 21:50:05 -0800 | [diff] [blame] | 999 | |
| 1000 | if (copy_from_user(name, user, sizeof(name)) != 0) |
| 1001 | return -EFAULT; |
| 1002 | |
Jan Engelhardt | 12b00c2 | 2010-10-13 15:56:56 +0200 | [diff] [blame] | 1003 | name[XT_TABLE_MAXNAMELEN-1] = '\0'; |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1004 | #ifdef CONFIG_COMPAT |
| 1005 | if (compat) |
| 1006 | xt_compat_lock(AF_INET6); |
| 1007 | #endif |
Alexey Dobriyan | 336b517 | 2008-01-31 04:03:45 -0800 | [diff] [blame] | 1008 | t = try_then_request_module(xt_find_table_lock(net, AF_INET6, name), |
Patrick McHardy | 433665c | 2007-12-17 21:50:05 -0800 | [diff] [blame] | 1009 | "ip6table_%s", name); |
YOSHIFUJI Hideaki / 吉藤英明 | 0cc8d8d | 2013-01-22 06:33:09 +0000 | [diff] [blame] | 1010 | if (!IS_ERR_OR_NULL(t)) { |
Patrick McHardy | 433665c | 2007-12-17 21:50:05 -0800 | [diff] [blame] | 1011 | struct ip6t_getinfo info; |
Jan Engelhardt | 5452e42 | 2008-04-14 11:15:35 +0200 | [diff] [blame] | 1012 | const struct xt_table_info *private = t->private; |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1013 | #ifdef CONFIG_COMPAT |
Alexey Dobriyan | 14c7dbe | 2010-02-08 11:17:43 -0800 | [diff] [blame] | 1014 | struct xt_table_info tmp; |
| 1015 | |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1016 | if (compat) { |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1017 | ret = compat_table_info(private, &tmp); |
| 1018 | xt_compat_flush_offsets(AF_INET6); |
| 1019 | private = &tmp; |
| 1020 | } |
| 1021 | #endif |
Jan Engelhardt | cccbe5e | 2010-11-03 18:55:39 -0700 | [diff] [blame] | 1022 | memset(&info, 0, sizeof(info)); |
Patrick McHardy | 433665c | 2007-12-17 21:50:05 -0800 | [diff] [blame] | 1023 | info.valid_hooks = t->valid_hooks; |
| 1024 | memcpy(info.hook_entry, private->hook_entry, |
| 1025 | sizeof(info.hook_entry)); |
| 1026 | memcpy(info.underflow, private->underflow, |
| 1027 | sizeof(info.underflow)); |
| 1028 | info.num_entries = private->number; |
| 1029 | info.size = private->size; |
Patrick McHardy | b5dd674 | 2007-12-17 21:52:35 -0800 | [diff] [blame] | 1030 | strcpy(info.name, name); |
Patrick McHardy | 433665c | 2007-12-17 21:50:05 -0800 | [diff] [blame] | 1031 | |
| 1032 | if (copy_to_user(user, &info, *len) != 0) |
| 1033 | ret = -EFAULT; |
| 1034 | else |
| 1035 | ret = 0; |
| 1036 | |
| 1037 | xt_table_unlock(t); |
| 1038 | module_put(t->me); |
| 1039 | } else |
| 1040 | ret = t ? PTR_ERR(t) : -ENOENT; |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1041 | #ifdef CONFIG_COMPAT |
| 1042 | if (compat) |
| 1043 | xt_compat_unlock(AF_INET6); |
| 1044 | #endif |
Patrick McHardy | 433665c | 2007-12-17 21:50:05 -0800 | [diff] [blame] | 1045 | return ret; |
| 1046 | } |
| 1047 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1048 | static int |
Jan Engelhardt | d5d1baa | 2009-06-26 07:51:59 +0200 | [diff] [blame] | 1049 | get_entries(struct net *net, struct ip6t_get_entries __user *uptr, |
Ian Morris | cda219c | 2015-10-11 17:32:15 +0100 | [diff] [blame] | 1050 | const int *len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1051 | { |
| 1052 | int ret; |
Patrick McHardy | d924357 | 2007-12-17 21:50:22 -0800 | [diff] [blame] | 1053 | struct ip6t_get_entries get; |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 1054 | struct xt_table *t; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1055 | |
Pablo Neira Ayuso | d7cdf81 | 2016-05-03 13:54:23 +0200 | [diff] [blame] | 1056 | if (*len < sizeof(get)) |
Patrick McHardy | d924357 | 2007-12-17 21:50:22 -0800 | [diff] [blame] | 1057 | return -EINVAL; |
Patrick McHardy | d924357 | 2007-12-17 21:50:22 -0800 | [diff] [blame] | 1058 | if (copy_from_user(&get, uptr, sizeof(get)) != 0) |
| 1059 | return -EFAULT; |
Pablo Neira Ayuso | d7cdf81 | 2016-05-03 13:54:23 +0200 | [diff] [blame] | 1060 | if (*len != sizeof(struct ip6t_get_entries) + get.size) |
Patrick McHardy | d924357 | 2007-12-17 21:50:22 -0800 | [diff] [blame] | 1061 | return -EINVAL; |
Pablo Neira Ayuso | d7cdf81 | 2016-05-03 13:54:23 +0200 | [diff] [blame] | 1062 | |
Pablo Neira Ayuso | b301f25 | 2016-03-24 21:29:53 +0100 | [diff] [blame] | 1063 | get.name[sizeof(get.name) - 1] = '\0'; |
Patrick McHardy | d924357 | 2007-12-17 21:50:22 -0800 | [diff] [blame] | 1064 | |
Alexey Dobriyan | 336b517 | 2008-01-31 04:03:45 -0800 | [diff] [blame] | 1065 | t = xt_find_table_lock(net, AF_INET6, get.name); |
YOSHIFUJI Hideaki / 吉藤英明 | 0cc8d8d | 2013-01-22 06:33:09 +0000 | [diff] [blame] | 1066 | if (!IS_ERR_OR_NULL(t)) { |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 1067 | struct xt_table_info *private = t->private; |
Patrick McHardy | d924357 | 2007-12-17 21:50:22 -0800 | [diff] [blame] | 1068 | if (get.size == private->size) |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 1069 | ret = copy_entries_to_user(private->size, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1070 | t, uptr->entrytable); |
Pablo Neira Ayuso | d7cdf81 | 2016-05-03 13:54:23 +0200 | [diff] [blame] | 1071 | else |
Patrick McHardy | 544473c | 2008-04-14 11:15:45 +0200 | [diff] [blame] | 1072 | ret = -EAGAIN; |
Pablo Neira Ayuso | d7cdf81 | 2016-05-03 13:54:23 +0200 | [diff] [blame] | 1073 | |
Harald Welte | 6b7d31f | 2005-10-26 09:34:24 +0200 | [diff] [blame] | 1074 | module_put(t->me); |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 1075 | xt_table_unlock(t); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1076 | } else |
Harald Welte | 6b7d31f | 2005-10-26 09:34:24 +0200 | [diff] [blame] | 1077 | ret = t ? PTR_ERR(t) : -ENOENT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1078 | |
| 1079 | return ret; |
| 1080 | } |
| 1081 | |
| 1082 | static int |
Alexey Dobriyan | 336b517 | 2008-01-31 04:03:45 -0800 | [diff] [blame] | 1083 | __do_replace(struct net *net, const char *name, unsigned int valid_hooks, |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1084 | struct xt_table_info *newinfo, unsigned int num_counters, |
| 1085 | void __user *counters_ptr) |
| 1086 | { |
| 1087 | int ret; |
| 1088 | struct xt_table *t; |
| 1089 | struct xt_table_info *oldinfo; |
| 1090 | struct xt_counters *counters; |
Jan Engelhardt | 72b2b1d | 2010-02-24 18:32:59 +0100 | [diff] [blame] | 1091 | struct ip6t_entry *iter; |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1092 | |
| 1093 | ret = 0; |
Eric Dumazet | 83723d6 | 2011-01-10 20:11:38 +0100 | [diff] [blame] | 1094 | counters = vzalloc(num_counters * sizeof(struct xt_counters)); |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1095 | if (!counters) { |
| 1096 | ret = -ENOMEM; |
| 1097 | goto out; |
| 1098 | } |
| 1099 | |
Alexey Dobriyan | 336b517 | 2008-01-31 04:03:45 -0800 | [diff] [blame] | 1100 | t = try_then_request_module(xt_find_table_lock(net, AF_INET6, name), |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1101 | "ip6table_%s", name); |
YOSHIFUJI Hideaki / 吉藤英明 | 0cc8d8d | 2013-01-22 06:33:09 +0000 | [diff] [blame] | 1102 | if (IS_ERR_OR_NULL(t)) { |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1103 | ret = t ? PTR_ERR(t) : -ENOENT; |
| 1104 | goto free_newinfo_counters_untrans; |
| 1105 | } |
| 1106 | |
| 1107 | /* You lied! */ |
| 1108 | if (valid_hooks != t->valid_hooks) { |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1109 | ret = -EINVAL; |
| 1110 | goto put_module; |
| 1111 | } |
| 1112 | |
| 1113 | oldinfo = xt_replace_table(t, num_counters, newinfo, &ret); |
| 1114 | if (!oldinfo) |
| 1115 | goto put_module; |
| 1116 | |
| 1117 | /* Update module usage count based on number of rules */ |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1118 | if ((oldinfo->number > oldinfo->initial_entries) || |
| 1119 | (newinfo->number <= oldinfo->initial_entries)) |
| 1120 | module_put(t->me); |
| 1121 | if ((oldinfo->number > oldinfo->initial_entries) && |
| 1122 | (newinfo->number <= oldinfo->initial_entries)) |
| 1123 | module_put(t->me); |
| 1124 | |
Stephen Hemminger | 942e4a2 | 2009-04-28 22:36:33 -0700 | [diff] [blame] | 1125 | /* Get the old counters, and synchronize with replace */ |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1126 | get_counters(oldinfo, counters); |
Stephen Hemminger | 942e4a2 | 2009-04-28 22:36:33 -0700 | [diff] [blame] | 1127 | |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1128 | /* Decrease module usage counts and free resource */ |
Florian Westphal | 482cfc3 | 2015-06-11 01:34:55 +0200 | [diff] [blame] | 1129 | xt_entry_foreach(iter, oldinfo->entries, oldinfo->size) |
Jan Engelhardt | 0559518 | 2010-02-24 18:33:43 +0100 | [diff] [blame] | 1130 | cleanup_entry(iter, net); |
Jan Engelhardt | 72b2b1d | 2010-02-24 18:32:59 +0100 | [diff] [blame] | 1131 | |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1132 | xt_free_table_info(oldinfo); |
| 1133 | if (copy_to_user(counters_ptr, counters, |
Thomas Graf | c58dd2d | 2014-04-04 17:57:45 +0200 | [diff] [blame] | 1134 | sizeof(struct xt_counters) * num_counters) != 0) { |
| 1135 | /* Silent error, can't fail, new table is already in place */ |
| 1136 | net_warn_ratelimited("ip6tables: counters copy to user failed while replacing table\n"); |
| 1137 | } |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1138 | vfree(counters); |
| 1139 | xt_table_unlock(t); |
| 1140 | return ret; |
| 1141 | |
| 1142 | put_module: |
| 1143 | module_put(t->me); |
| 1144 | xt_table_unlock(t); |
| 1145 | free_newinfo_counters_untrans: |
| 1146 | vfree(counters); |
| 1147 | out: |
| 1148 | return ret; |
| 1149 | } |
| 1150 | |
| 1151 | static int |
Jan Engelhardt | d5d1baa | 2009-06-26 07:51:59 +0200 | [diff] [blame] | 1152 | do_replace(struct net *net, const void __user *user, unsigned int len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1153 | { |
| 1154 | int ret; |
| 1155 | struct ip6t_replace tmp; |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1156 | struct xt_table_info *newinfo; |
| 1157 | void *loc_cpu_entry; |
Jan Engelhardt | 72b2b1d | 2010-02-24 18:32:59 +0100 | [diff] [blame] | 1158 | struct ip6t_entry *iter; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1159 | |
| 1160 | if (copy_from_user(&tmp, user, sizeof(tmp)) != 0) |
| 1161 | return -EFAULT; |
| 1162 | |
Kirill Korotaev | ee4bb81 | 2006-02-04 02:16:56 -0800 | [diff] [blame] | 1163 | /* overflow check */ |
Kirill Korotaev | ee4bb81 | 2006-02-04 02:16:56 -0800 | [diff] [blame] | 1164 | if (tmp.num_counters >= INT_MAX / sizeof(struct xt_counters)) |
| 1165 | return -ENOMEM; |
Dave Jones | 1086bbe | 2015-05-19 20:55:17 -0400 | [diff] [blame] | 1166 | if (tmp.num_counters == 0) |
| 1167 | return -EINVAL; |
| 1168 | |
Vasiliy Kulikov | 6a8ab060 | 2011-03-15 13:37:13 +0100 | [diff] [blame] | 1169 | tmp.name[sizeof(tmp.name)-1] = 0; |
Kirill Korotaev | ee4bb81 | 2006-02-04 02:16:56 -0800 | [diff] [blame] | 1170 | |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 1171 | newinfo = xt_alloc_table_info(tmp.size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1172 | if (!newinfo) |
| 1173 | return -ENOMEM; |
| 1174 | |
Florian Westphal | 482cfc3 | 2015-06-11 01:34:55 +0200 | [diff] [blame] | 1175 | loc_cpu_entry = newinfo->entries; |
Eric Dumazet | 3183606 | 2005-12-13 23:13:48 -0800 | [diff] [blame] | 1176 | if (copy_from_user(loc_cpu_entry, user + sizeof(tmp), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1177 | tmp.size) != 0) { |
| 1178 | ret = -EFAULT; |
| 1179 | goto free_newinfo; |
| 1180 | } |
| 1181 | |
Jan Engelhardt | 0f23421 | 2010-02-24 18:36:04 +0100 | [diff] [blame] | 1182 | ret = translate_table(net, newinfo, loc_cpu_entry, &tmp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1183 | if (ret != 0) |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1184 | goto free_newinfo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1185 | |
Alexey Dobriyan | 336b517 | 2008-01-31 04:03:45 -0800 | [diff] [blame] | 1186 | ret = __do_replace(net, tmp.name, tmp.valid_hooks, newinfo, |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1187 | tmp.num_counters, tmp.counters); |
| 1188 | if (ret) |
| 1189 | goto free_newinfo_untrans; |
| 1190 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1191 | |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1192 | free_newinfo_untrans: |
Jan Engelhardt | 72b2b1d | 2010-02-24 18:32:59 +0100 | [diff] [blame] | 1193 | xt_entry_foreach(iter, loc_cpu_entry, newinfo->size) |
Jan Engelhardt | 0559518 | 2010-02-24 18:33:43 +0100 | [diff] [blame] | 1194 | cleanup_entry(iter, net); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1195 | free_newinfo: |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 1196 | xt_free_table_info(newinfo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1197 | return ret; |
| 1198 | } |
| 1199 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1200 | static int |
Jan Engelhardt | d5d1baa | 2009-06-26 07:51:59 +0200 | [diff] [blame] | 1201 | do_add_counters(struct net *net, const void __user *user, unsigned int len, |
Alexey Dobriyan | 336b517 | 2008-01-31 04:03:45 -0800 | [diff] [blame] | 1202 | int compat) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1203 | { |
Florian Westphal | 482cfc3 | 2015-06-11 01:34:55 +0200 | [diff] [blame] | 1204 | unsigned int i; |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1205 | struct xt_counters_info tmp; |
| 1206 | struct xt_counters *paddc; |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 1207 | struct xt_table *t; |
Jan Engelhardt | 5452e42 | 2008-04-14 11:15:35 +0200 | [diff] [blame] | 1208 | const struct xt_table_info *private; |
Harald Welte | 6b7d31f | 2005-10-26 09:34:24 +0200 | [diff] [blame] | 1209 | int ret = 0; |
Jan Engelhardt | 72b2b1d | 2010-02-24 18:32:59 +0100 | [diff] [blame] | 1210 | struct ip6t_entry *iter; |
Eric Dumazet | 7f5c6d4 | 2011-04-04 17:04:03 +0200 | [diff] [blame] | 1211 | unsigned int addend; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1212 | |
Florian Westphal | d7591f0 | 2016-04-01 15:37:59 +0200 | [diff] [blame] | 1213 | paddc = xt_copy_counters_from_user(user, len, &tmp, compat); |
| 1214 | if (IS_ERR(paddc)) |
| 1215 | return PTR_ERR(paddc); |
| 1216 | t = xt_find_table_lock(net, AF_INET6, tmp.name); |
YOSHIFUJI Hideaki / 吉藤英明 | 0cc8d8d | 2013-01-22 06:33:09 +0000 | [diff] [blame] | 1217 | if (IS_ERR_OR_NULL(t)) { |
Harald Welte | 6b7d31f | 2005-10-26 09:34:24 +0200 | [diff] [blame] | 1218 | ret = t ? PTR_ERR(t) : -ENOENT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1219 | goto free; |
Harald Welte | 6b7d31f | 2005-10-26 09:34:24 +0200 | [diff] [blame] | 1220 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1221 | |
Stephen Hemminger | 942e4a2 | 2009-04-28 22:36:33 -0700 | [diff] [blame] | 1222 | local_bh_disable(); |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 1223 | private = t->private; |
Florian Westphal | d7591f0 | 2016-04-01 15:37:59 +0200 | [diff] [blame] | 1224 | if (private->number != tmp.num_counters) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1225 | ret = -EINVAL; |
| 1226 | goto unlock_up_free; |
| 1227 | } |
| 1228 | |
| 1229 | i = 0; |
Eric Dumazet | 7f5c6d4 | 2011-04-04 17:04:03 +0200 | [diff] [blame] | 1230 | addend = xt_write_recseq_begin(); |
Florian Westphal | 482cfc3 | 2015-06-11 01:34:55 +0200 | [diff] [blame] | 1231 | xt_entry_foreach(iter, private->entries, private->size) { |
Florian Westphal | 71ae0df | 2015-06-11 01:34:54 +0200 | [diff] [blame] | 1232 | struct xt_counters *tmp; |
| 1233 | |
| 1234 | tmp = xt_get_this_cpu_counter(&iter->counters); |
| 1235 | ADD_COUNTER(*tmp, paddc[i].bcnt, paddc[i].pcnt); |
Jan Engelhardt | 0559518 | 2010-02-24 18:33:43 +0100 | [diff] [blame] | 1236 | ++i; |
| 1237 | } |
Eric Dumazet | 7f5c6d4 | 2011-04-04 17:04:03 +0200 | [diff] [blame] | 1238 | xt_write_recseq_end(addend); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1239 | unlock_up_free: |
Stephen Hemminger | 942e4a2 | 2009-04-28 22:36:33 -0700 | [diff] [blame] | 1240 | local_bh_enable(); |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 1241 | xt_table_unlock(t); |
Harald Welte | 6b7d31f | 2005-10-26 09:34:24 +0200 | [diff] [blame] | 1242 | module_put(t->me); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1243 | free: |
| 1244 | vfree(paddc); |
| 1245 | |
| 1246 | return ret; |
| 1247 | } |
| 1248 | |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1249 | #ifdef CONFIG_COMPAT |
| 1250 | struct compat_ip6t_replace { |
Jan Engelhardt | 12b00c2 | 2010-10-13 15:56:56 +0200 | [diff] [blame] | 1251 | char name[XT_TABLE_MAXNAMELEN]; |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1252 | u32 valid_hooks; |
| 1253 | u32 num_entries; |
| 1254 | u32 size; |
| 1255 | u32 hook_entry[NF_INET_NUMHOOKS]; |
| 1256 | u32 underflow[NF_INET_NUMHOOKS]; |
| 1257 | u32 num_counters; |
Jan Engelhardt | 87a2e70d | 2010-10-13 16:11:22 +0200 | [diff] [blame] | 1258 | compat_uptr_t counters; /* struct xt_counters * */ |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1259 | struct compat_ip6t_entry entries[0]; |
| 1260 | }; |
| 1261 | |
| 1262 | static int |
| 1263 | compat_copy_entry_to_user(struct ip6t_entry *e, void __user **dstptr, |
Patrick McHardy | b0a6363 | 2008-01-31 04:10:18 -0800 | [diff] [blame] | 1264 | unsigned int *size, struct xt_counters *counters, |
Jan Engelhardt | 0559518 | 2010-02-24 18:33:43 +0100 | [diff] [blame] | 1265 | unsigned int i) |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1266 | { |
Jan Engelhardt | 87a2e70d | 2010-10-13 16:11:22 +0200 | [diff] [blame] | 1267 | struct xt_entry_target *t; |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1268 | struct compat_ip6t_entry __user *ce; |
| 1269 | u_int16_t target_offset, next_offset; |
| 1270 | compat_uint_t origsize; |
Jan Engelhardt | dcea992 | 2010-02-24 18:34:48 +0100 | [diff] [blame] | 1271 | const struct xt_entry_match *ematch; |
| 1272 | int ret = 0; |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1273 | |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1274 | origsize = *size; |
| 1275 | ce = (struct compat_ip6t_entry __user *)*dstptr; |
Jan Engelhardt | 0559518 | 2010-02-24 18:33:43 +0100 | [diff] [blame] | 1276 | if (copy_to_user(ce, e, sizeof(struct ip6t_entry)) != 0 || |
| 1277 | copy_to_user(&ce->counters, &counters[i], |
| 1278 | sizeof(counters[i])) != 0) |
| 1279 | return -EFAULT; |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1280 | |
| 1281 | *dstptr += sizeof(struct compat_ip6t_entry); |
| 1282 | *size -= sizeof(struct ip6t_entry) - sizeof(struct compat_ip6t_entry); |
| 1283 | |
Jan Engelhardt | dcea992 | 2010-02-24 18:34:48 +0100 | [diff] [blame] | 1284 | xt_ematch_foreach(ematch, e) { |
| 1285 | ret = xt_compat_match_to_user(ematch, dstptr, size); |
| 1286 | if (ret != 0) |
Jan Engelhardt | 6bdb331 | 2010-02-24 18:35:37 +0100 | [diff] [blame] | 1287 | return ret; |
Jan Engelhardt | dcea992 | 2010-02-24 18:34:48 +0100 | [diff] [blame] | 1288 | } |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1289 | target_offset = e->target_offset - (origsize - *size); |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1290 | t = ip6t_get_target(e); |
| 1291 | ret = xt_compat_target_to_user(t, dstptr, size); |
| 1292 | if (ret) |
Jan Engelhardt | 0559518 | 2010-02-24 18:33:43 +0100 | [diff] [blame] | 1293 | return ret; |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1294 | next_offset = e->next_offset - (origsize - *size); |
Jan Engelhardt | 0559518 | 2010-02-24 18:33:43 +0100 | [diff] [blame] | 1295 | if (put_user(target_offset, &ce->target_offset) != 0 || |
| 1296 | put_user(next_offset, &ce->next_offset) != 0) |
| 1297 | return -EFAULT; |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1298 | return 0; |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1299 | } |
| 1300 | |
Denys Vlasenko | 022748a | 2008-01-14 23:44:05 -0800 | [diff] [blame] | 1301 | static int |
Jan Engelhardt | 87a2e70d | 2010-10-13 16:11:22 +0200 | [diff] [blame] | 1302 | compat_find_calc_match(struct xt_entry_match *m, |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1303 | const struct ip6t_ip6 *ipv6, |
Jan Engelhardt | 6bdb331 | 2010-02-24 18:35:37 +0100 | [diff] [blame] | 1304 | int *size) |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1305 | { |
| 1306 | struct xt_match *match; |
| 1307 | |
Jan Engelhardt | fd0ec0e | 2009-07-10 19:27:47 +0200 | [diff] [blame] | 1308 | match = xt_request_find_match(NFPROTO_IPV6, m->u.user.name, |
| 1309 | m->u.user.revision); |
Pablo Neira Ayuso | d7cdf81 | 2016-05-03 13:54:23 +0200 | [diff] [blame] | 1310 | if (IS_ERR(match)) |
Jan Engelhardt | fd0ec0e | 2009-07-10 19:27:47 +0200 | [diff] [blame] | 1311 | return PTR_ERR(match); |
Pablo Neira Ayuso | d7cdf81 | 2016-05-03 13:54:23 +0200 | [diff] [blame] | 1312 | |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1313 | m->u.kernel.match = match; |
| 1314 | *size += xt_compat_match_offset(match); |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1315 | return 0; |
| 1316 | } |
| 1317 | |
Jan Engelhardt | 0559518 | 2010-02-24 18:33:43 +0100 | [diff] [blame] | 1318 | static void compat_release_entry(struct compat_ip6t_entry *e) |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1319 | { |
Jan Engelhardt | 87a2e70d | 2010-10-13 16:11:22 +0200 | [diff] [blame] | 1320 | struct xt_entry_target *t; |
Jan Engelhardt | dcea992 | 2010-02-24 18:34:48 +0100 | [diff] [blame] | 1321 | struct xt_entry_match *ematch; |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1322 | |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1323 | /* Cleanup all matches */ |
Jan Engelhardt | dcea992 | 2010-02-24 18:34:48 +0100 | [diff] [blame] | 1324 | xt_ematch_foreach(ematch, e) |
Jan Engelhardt | 6bdb331 | 2010-02-24 18:35:37 +0100 | [diff] [blame] | 1325 | module_put(ematch->u.kernel.match->me); |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1326 | t = compat_ip6t_get_target(e); |
| 1327 | module_put(t->u.kernel.target->me); |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1328 | } |
| 1329 | |
Denys Vlasenko | 022748a | 2008-01-14 23:44:05 -0800 | [diff] [blame] | 1330 | static int |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1331 | check_compat_entry_size_and_hooks(struct compat_ip6t_entry *e, |
| 1332 | struct xt_table_info *newinfo, |
| 1333 | unsigned int *size, |
Jan Engelhardt | d5d1baa | 2009-06-26 07:51:59 +0200 | [diff] [blame] | 1334 | const unsigned char *base, |
Florian Westphal | 09d9686 | 2016-04-01 14:17:34 +0200 | [diff] [blame] | 1335 | const unsigned char *limit) |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1336 | { |
Jan Engelhardt | dcea992 | 2010-02-24 18:34:48 +0100 | [diff] [blame] | 1337 | struct xt_entry_match *ematch; |
Jan Engelhardt | 87a2e70d | 2010-10-13 16:11:22 +0200 | [diff] [blame] | 1338 | struct xt_entry_target *t; |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1339 | struct xt_target *target; |
| 1340 | unsigned int entry_offset; |
Patrick McHardy | b0a6363 | 2008-01-31 04:10:18 -0800 | [diff] [blame] | 1341 | unsigned int j; |
Florian Westphal | 09d9686 | 2016-04-01 14:17:34 +0200 | [diff] [blame] | 1342 | int ret, off; |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1343 | |
Joe Perches | 3666ed1 | 2009-11-23 23:17:06 +0100 | [diff] [blame] | 1344 | if ((unsigned long)e % __alignof__(struct compat_ip6t_entry) != 0 || |
Florian Westphal | 6e94e0c | 2016-03-22 18:02:50 +0100 | [diff] [blame] | 1345 | (unsigned char *)e + sizeof(struct compat_ip6t_entry) >= limit || |
Pablo Neira Ayuso | d7cdf81 | 2016-05-03 13:54:23 +0200 | [diff] [blame] | 1346 | (unsigned char *)e + e->next_offset > limit) |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1347 | return -EINVAL; |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1348 | |
| 1349 | if (e->next_offset < sizeof(struct compat_ip6t_entry) + |
Pablo Neira Ayuso | d7cdf81 | 2016-05-03 13:54:23 +0200 | [diff] [blame] | 1350 | sizeof(struct compat_xt_entry_target)) |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1351 | return -EINVAL; |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1352 | |
Florian Westphal | aa412ba | 2016-04-01 14:17:24 +0200 | [diff] [blame] | 1353 | if (!ip6_checkentry(&e->ipv6)) |
| 1354 | return -EINVAL; |
| 1355 | |
Florian Westphal | ce683e5 | 2016-04-01 14:17:28 +0200 | [diff] [blame] | 1356 | ret = xt_compat_check_entry_offsets(e, e->elems, |
Florian Westphal | fc1221b | 2016-04-01 14:17:26 +0200 | [diff] [blame] | 1357 | e->target_offset, e->next_offset); |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1358 | if (ret) |
| 1359 | return ret; |
| 1360 | |
| 1361 | off = sizeof(struct ip6t_entry) - sizeof(struct compat_ip6t_entry); |
| 1362 | entry_offset = (void *)e - (void *)base; |
| 1363 | j = 0; |
Jan Engelhardt | dcea992 | 2010-02-24 18:34:48 +0100 | [diff] [blame] | 1364 | xt_ematch_foreach(ematch, e) { |
Florian Westphal | 329a080 | 2016-04-01 14:17:31 +0200 | [diff] [blame] | 1365 | ret = compat_find_calc_match(ematch, &e->ipv6, &off); |
Jan Engelhardt | dcea992 | 2010-02-24 18:34:48 +0100 | [diff] [blame] | 1366 | if (ret != 0) |
Jan Engelhardt | 6bdb331 | 2010-02-24 18:35:37 +0100 | [diff] [blame] | 1367 | goto release_matches; |
| 1368 | ++j; |
Jan Engelhardt | dcea992 | 2010-02-24 18:34:48 +0100 | [diff] [blame] | 1369 | } |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1370 | |
| 1371 | t = compat_ip6t_get_target(e); |
Jan Engelhardt | d2a7b6b | 2009-07-10 18:55:11 +0200 | [diff] [blame] | 1372 | target = xt_request_find_target(NFPROTO_IPV6, t->u.user.name, |
| 1373 | t->u.user.revision); |
| 1374 | if (IS_ERR(target)) { |
Jan Engelhardt | d2a7b6b | 2009-07-10 18:55:11 +0200 | [diff] [blame] | 1375 | ret = PTR_ERR(target); |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1376 | goto release_matches; |
| 1377 | } |
| 1378 | t->u.kernel.target = target; |
| 1379 | |
| 1380 | off += xt_compat_target_offset(target); |
| 1381 | *size += off; |
| 1382 | ret = xt_compat_add_offset(AF_INET6, entry_offset, off); |
| 1383 | if (ret) |
| 1384 | goto out; |
| 1385 | |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1386 | return 0; |
| 1387 | |
| 1388 | out: |
| 1389 | module_put(t->u.kernel.target->me); |
| 1390 | release_matches: |
Jan Engelhardt | 6bdb331 | 2010-02-24 18:35:37 +0100 | [diff] [blame] | 1391 | xt_ematch_foreach(ematch, e) { |
| 1392 | if (j-- == 0) |
Jan Engelhardt | dcea992 | 2010-02-24 18:34:48 +0100 | [diff] [blame] | 1393 | break; |
Jan Engelhardt | 6bdb331 | 2010-02-24 18:35:37 +0100 | [diff] [blame] | 1394 | module_put(ematch->u.kernel.match->me); |
| 1395 | } |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1396 | return ret; |
| 1397 | } |
| 1398 | |
Florian Westphal | 0188346 | 2016-04-01 14:17:33 +0200 | [diff] [blame] | 1399 | static void |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1400 | compat_copy_entry_from_user(struct compat_ip6t_entry *e, void **dstptr, |
Florian Westphal | 329a080 | 2016-04-01 14:17:31 +0200 | [diff] [blame] | 1401 | unsigned int *size, |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1402 | struct xt_table_info *newinfo, unsigned char *base) |
| 1403 | { |
Jan Engelhardt | 87a2e70d | 2010-10-13 16:11:22 +0200 | [diff] [blame] | 1404 | struct xt_entry_target *t; |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1405 | struct ip6t_entry *de; |
| 1406 | unsigned int origsize; |
Florian Westphal | 0188346 | 2016-04-01 14:17:33 +0200 | [diff] [blame] | 1407 | int h; |
Jan Engelhardt | dcea992 | 2010-02-24 18:34:48 +0100 | [diff] [blame] | 1408 | struct xt_entry_match *ematch; |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1409 | |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1410 | origsize = *size; |
| 1411 | de = (struct ip6t_entry *)*dstptr; |
| 1412 | memcpy(de, e, sizeof(struct ip6t_entry)); |
| 1413 | memcpy(&de->counters, &e->counters, sizeof(e->counters)); |
| 1414 | |
| 1415 | *dstptr += sizeof(struct ip6t_entry); |
| 1416 | *size += sizeof(struct ip6t_entry) - sizeof(struct compat_ip6t_entry); |
| 1417 | |
Florian Westphal | 0188346 | 2016-04-01 14:17:33 +0200 | [diff] [blame] | 1418 | xt_ematch_foreach(ematch, e) |
| 1419 | xt_compat_match_from_user(ematch, dstptr, size); |
| 1420 | |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1421 | de->target_offset = e->target_offset - (origsize - *size); |
| 1422 | t = compat_ip6t_get_target(e); |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1423 | xt_compat_target_from_user(t, dstptr, size); |
| 1424 | |
| 1425 | de->next_offset = e->next_offset - (origsize - *size); |
| 1426 | for (h = 0; h < NF_INET_NUMHOOKS; h++) { |
| 1427 | if ((unsigned char *)de - base < newinfo->hook_entry[h]) |
| 1428 | newinfo->hook_entry[h] -= origsize - *size; |
| 1429 | if ((unsigned char *)de - base < newinfo->underflow[h]) |
| 1430 | newinfo->underflow[h] -= origsize - *size; |
| 1431 | } |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1432 | } |
| 1433 | |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1434 | static int |
Alexey Dobriyan | f54e936 | 2010-01-18 08:25:47 +0100 | [diff] [blame] | 1435 | translate_compat_table(struct net *net, |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1436 | struct xt_table_info **pinfo, |
| 1437 | void **pentry0, |
Florian Westphal | 329a080 | 2016-04-01 14:17:31 +0200 | [diff] [blame] | 1438 | const struct compat_ip6t_replace *compatr) |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1439 | { |
| 1440 | unsigned int i, j; |
| 1441 | struct xt_table_info *newinfo, *info; |
| 1442 | void *pos, *entry0, *entry1; |
Jan Engelhardt | 72b2b1d | 2010-02-24 18:32:59 +0100 | [diff] [blame] | 1443 | struct compat_ip6t_entry *iter0; |
Florian Westphal | 09d9686 | 2016-04-01 14:17:34 +0200 | [diff] [blame] | 1444 | struct ip6t_replace repl; |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1445 | unsigned int size; |
Jan Engelhardt | 72b2b1d | 2010-02-24 18:32:59 +0100 | [diff] [blame] | 1446 | int ret = 0; |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1447 | |
| 1448 | info = *pinfo; |
| 1449 | entry0 = *pentry0; |
Florian Westphal | 329a080 | 2016-04-01 14:17:31 +0200 | [diff] [blame] | 1450 | size = compatr->size; |
| 1451 | info->number = compatr->num_entries; |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1452 | |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1453 | j = 0; |
| 1454 | xt_compat_lock(AF_INET6); |
Florian Westphal | 329a080 | 2016-04-01 14:17:31 +0200 | [diff] [blame] | 1455 | xt_compat_init_offsets(AF_INET6, compatr->num_entries); |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1456 | /* Walk through entries, checking offsets. */ |
Florian Westphal | 329a080 | 2016-04-01 14:17:31 +0200 | [diff] [blame] | 1457 | xt_entry_foreach(iter0, entry0, compatr->size) { |
Jan Engelhardt | 72b2b1d | 2010-02-24 18:32:59 +0100 | [diff] [blame] | 1458 | ret = check_compat_entry_size_and_hooks(iter0, info, &size, |
Jan Engelhardt | 6b4ff2d | 2010-02-26 17:53:31 +0100 | [diff] [blame] | 1459 | entry0, |
Florian Westphal | 09d9686 | 2016-04-01 14:17:34 +0200 | [diff] [blame] | 1460 | entry0 + compatr->size); |
Jan Engelhardt | 72b2b1d | 2010-02-24 18:32:59 +0100 | [diff] [blame] | 1461 | if (ret != 0) |
Jan Engelhardt | 0559518 | 2010-02-24 18:33:43 +0100 | [diff] [blame] | 1462 | goto out_unlock; |
| 1463 | ++j; |
Jan Engelhardt | 72b2b1d | 2010-02-24 18:32:59 +0100 | [diff] [blame] | 1464 | } |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1465 | |
| 1466 | ret = -EINVAL; |
Pablo Neira Ayuso | d7cdf81 | 2016-05-03 13:54:23 +0200 | [diff] [blame] | 1467 | if (j != compatr->num_entries) |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1468 | goto out_unlock; |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1469 | |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1470 | ret = -ENOMEM; |
| 1471 | newinfo = xt_alloc_table_info(size); |
| 1472 | if (!newinfo) |
| 1473 | goto out_unlock; |
| 1474 | |
Florian Westphal | 329a080 | 2016-04-01 14:17:31 +0200 | [diff] [blame] | 1475 | newinfo->number = compatr->num_entries; |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1476 | for (i = 0; i < NF_INET_NUMHOOKS; i++) { |
Florian Westphal | 09d9686 | 2016-04-01 14:17:34 +0200 | [diff] [blame] | 1477 | newinfo->hook_entry[i] = compatr->hook_entry[i]; |
| 1478 | newinfo->underflow[i] = compatr->underflow[i]; |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1479 | } |
Florian Westphal | 482cfc3 | 2015-06-11 01:34:55 +0200 | [diff] [blame] | 1480 | entry1 = newinfo->entries; |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1481 | pos = entry1; |
Florian Westphal | 09d9686 | 2016-04-01 14:17:34 +0200 | [diff] [blame] | 1482 | size = compatr->size; |
Florian Westphal | 0188346 | 2016-04-01 14:17:33 +0200 | [diff] [blame] | 1483 | xt_entry_foreach(iter0, entry0, compatr->size) |
| 1484 | compat_copy_entry_from_user(iter0, &pos, &size, |
| 1485 | newinfo, entry1); |
| 1486 | |
Florian Westphal | 09d9686 | 2016-04-01 14:17:34 +0200 | [diff] [blame] | 1487 | /* all module references in entry0 are now gone. */ |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1488 | xt_compat_flush_offsets(AF_INET6); |
| 1489 | xt_compat_unlock(AF_INET6); |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1490 | |
Florian Westphal | 09d9686 | 2016-04-01 14:17:34 +0200 | [diff] [blame] | 1491 | memcpy(&repl, compatr, sizeof(*compatr)); |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1492 | |
Florian Westphal | 09d9686 | 2016-04-01 14:17:34 +0200 | [diff] [blame] | 1493 | for (i = 0; i < NF_INET_NUMHOOKS; i++) { |
| 1494 | repl.hook_entry[i] = newinfo->hook_entry[i]; |
| 1495 | repl.underflow[i] = newinfo->underflow[i]; |
Jan Engelhardt | 72b2b1d | 2010-02-24 18:32:59 +0100 | [diff] [blame] | 1496 | } |
Florian Westphal | 09d9686 | 2016-04-01 14:17:34 +0200 | [diff] [blame] | 1497 | |
| 1498 | repl.num_counters = 0; |
| 1499 | repl.counters = NULL; |
| 1500 | repl.size = newinfo->size; |
| 1501 | ret = translate_table(net, newinfo, entry1, &repl); |
| 1502 | if (ret) |
| 1503 | goto free_newinfo; |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1504 | |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1505 | *pinfo = newinfo; |
| 1506 | *pentry0 = entry1; |
| 1507 | xt_free_table_info(info); |
| 1508 | return 0; |
| 1509 | |
| 1510 | free_newinfo: |
| 1511 | xt_free_table_info(newinfo); |
Florian Westphal | 09d9686 | 2016-04-01 14:17:34 +0200 | [diff] [blame] | 1512 | return ret; |
| 1513 | out_unlock: |
| 1514 | xt_compat_flush_offsets(AF_INET6); |
| 1515 | xt_compat_unlock(AF_INET6); |
Florian Westphal | 329a080 | 2016-04-01 14:17:31 +0200 | [diff] [blame] | 1516 | xt_entry_foreach(iter0, entry0, compatr->size) { |
Jan Engelhardt | 0559518 | 2010-02-24 18:33:43 +0100 | [diff] [blame] | 1517 | if (j-- == 0) |
Jan Engelhardt | 72b2b1d | 2010-02-24 18:32:59 +0100 | [diff] [blame] | 1518 | break; |
Jan Engelhardt | 0559518 | 2010-02-24 18:33:43 +0100 | [diff] [blame] | 1519 | compat_release_entry(iter0); |
| 1520 | } |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1521 | return ret; |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1522 | } |
| 1523 | |
| 1524 | static int |
Alexey Dobriyan | 336b517 | 2008-01-31 04:03:45 -0800 | [diff] [blame] | 1525 | compat_do_replace(struct net *net, void __user *user, unsigned int len) |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1526 | { |
| 1527 | int ret; |
| 1528 | struct compat_ip6t_replace tmp; |
| 1529 | struct xt_table_info *newinfo; |
| 1530 | void *loc_cpu_entry; |
Jan Engelhardt | 72b2b1d | 2010-02-24 18:32:59 +0100 | [diff] [blame] | 1531 | struct ip6t_entry *iter; |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1532 | |
| 1533 | if (copy_from_user(&tmp, user, sizeof(tmp)) != 0) |
| 1534 | return -EFAULT; |
| 1535 | |
| 1536 | /* overflow check */ |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1537 | if (tmp.num_counters >= INT_MAX / sizeof(struct xt_counters)) |
| 1538 | return -ENOMEM; |
Dave Jones | 1086bbe | 2015-05-19 20:55:17 -0400 | [diff] [blame] | 1539 | if (tmp.num_counters == 0) |
| 1540 | return -EINVAL; |
| 1541 | |
Vasiliy Kulikov | 6a8ab060 | 2011-03-15 13:37:13 +0100 | [diff] [blame] | 1542 | tmp.name[sizeof(tmp.name)-1] = 0; |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1543 | |
| 1544 | newinfo = xt_alloc_table_info(tmp.size); |
| 1545 | if (!newinfo) |
| 1546 | return -ENOMEM; |
| 1547 | |
Florian Westphal | 482cfc3 | 2015-06-11 01:34:55 +0200 | [diff] [blame] | 1548 | loc_cpu_entry = newinfo->entries; |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1549 | if (copy_from_user(loc_cpu_entry, user + sizeof(tmp), |
| 1550 | tmp.size) != 0) { |
| 1551 | ret = -EFAULT; |
| 1552 | goto free_newinfo; |
| 1553 | } |
| 1554 | |
Florian Westphal | 329a080 | 2016-04-01 14:17:31 +0200 | [diff] [blame] | 1555 | ret = translate_compat_table(net, &newinfo, &loc_cpu_entry, &tmp); |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1556 | if (ret != 0) |
| 1557 | goto free_newinfo; |
| 1558 | |
Alexey Dobriyan | 336b517 | 2008-01-31 04:03:45 -0800 | [diff] [blame] | 1559 | ret = __do_replace(net, tmp.name, tmp.valid_hooks, newinfo, |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1560 | tmp.num_counters, compat_ptr(tmp.counters)); |
| 1561 | if (ret) |
| 1562 | goto free_newinfo_untrans; |
| 1563 | return 0; |
| 1564 | |
| 1565 | free_newinfo_untrans: |
Jan Engelhardt | 72b2b1d | 2010-02-24 18:32:59 +0100 | [diff] [blame] | 1566 | xt_entry_foreach(iter, loc_cpu_entry, newinfo->size) |
Jan Engelhardt | 0559518 | 2010-02-24 18:33:43 +0100 | [diff] [blame] | 1567 | cleanup_entry(iter, net); |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1568 | free_newinfo: |
| 1569 | xt_free_table_info(newinfo); |
| 1570 | return ret; |
| 1571 | } |
| 1572 | |
| 1573 | static int |
| 1574 | compat_do_ip6t_set_ctl(struct sock *sk, int cmd, void __user *user, |
| 1575 | unsigned int len) |
| 1576 | { |
| 1577 | int ret; |
| 1578 | |
Eric W. Biederman | af31f41 | 2012-11-16 03:03:06 +0000 | [diff] [blame] | 1579 | if (!ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN)) |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1580 | return -EPERM; |
| 1581 | |
| 1582 | switch (cmd) { |
| 1583 | case IP6T_SO_SET_REPLACE: |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 1584 | ret = compat_do_replace(sock_net(sk), user, len); |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1585 | break; |
| 1586 | |
| 1587 | case IP6T_SO_SET_ADD_COUNTERS: |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 1588 | ret = do_add_counters(sock_net(sk), user, len, 1); |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1589 | break; |
| 1590 | |
| 1591 | default: |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1592 | ret = -EINVAL; |
| 1593 | } |
| 1594 | |
| 1595 | return ret; |
| 1596 | } |
| 1597 | |
| 1598 | struct compat_ip6t_get_entries { |
Jan Engelhardt | 12b00c2 | 2010-10-13 15:56:56 +0200 | [diff] [blame] | 1599 | char name[XT_TABLE_MAXNAMELEN]; |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1600 | compat_uint_t size; |
| 1601 | struct compat_ip6t_entry entrytable[0]; |
| 1602 | }; |
| 1603 | |
| 1604 | static int |
| 1605 | compat_copy_entries_to_user(unsigned int total_size, struct xt_table *table, |
| 1606 | void __user *userptr) |
| 1607 | { |
| 1608 | struct xt_counters *counters; |
Jan Engelhardt | 5452e42 | 2008-04-14 11:15:35 +0200 | [diff] [blame] | 1609 | const struct xt_table_info *private = table->private; |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1610 | void __user *pos; |
| 1611 | unsigned int size; |
| 1612 | int ret = 0; |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1613 | unsigned int i = 0; |
Jan Engelhardt | 72b2b1d | 2010-02-24 18:32:59 +0100 | [diff] [blame] | 1614 | struct ip6t_entry *iter; |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1615 | |
| 1616 | counters = alloc_counters(table); |
| 1617 | if (IS_ERR(counters)) |
| 1618 | return PTR_ERR(counters); |
| 1619 | |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1620 | pos = userptr; |
| 1621 | size = total_size; |
Florian Westphal | 482cfc3 | 2015-06-11 01:34:55 +0200 | [diff] [blame] | 1622 | xt_entry_foreach(iter, private->entries, total_size) { |
Jan Engelhardt | 72b2b1d | 2010-02-24 18:32:59 +0100 | [diff] [blame] | 1623 | ret = compat_copy_entry_to_user(iter, &pos, |
Jan Engelhardt | 6b4ff2d | 2010-02-26 17:53:31 +0100 | [diff] [blame] | 1624 | &size, counters, i++); |
Jan Engelhardt | 72b2b1d | 2010-02-24 18:32:59 +0100 | [diff] [blame] | 1625 | if (ret != 0) |
| 1626 | break; |
| 1627 | } |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1628 | |
| 1629 | vfree(counters); |
| 1630 | return ret; |
| 1631 | } |
| 1632 | |
| 1633 | static int |
Alexey Dobriyan | 336b517 | 2008-01-31 04:03:45 -0800 | [diff] [blame] | 1634 | compat_get_entries(struct net *net, struct compat_ip6t_get_entries __user *uptr, |
| 1635 | int *len) |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1636 | { |
| 1637 | int ret; |
| 1638 | struct compat_ip6t_get_entries get; |
| 1639 | struct xt_table *t; |
| 1640 | |
Pablo Neira Ayuso | d7cdf81 | 2016-05-03 13:54:23 +0200 | [diff] [blame] | 1641 | if (*len < sizeof(get)) |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1642 | return -EINVAL; |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1643 | |
| 1644 | if (copy_from_user(&get, uptr, sizeof(get)) != 0) |
| 1645 | return -EFAULT; |
| 1646 | |
Pablo Neira Ayuso | d7cdf81 | 2016-05-03 13:54:23 +0200 | [diff] [blame] | 1647 | if (*len != sizeof(struct compat_ip6t_get_entries) + get.size) |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1648 | return -EINVAL; |
Pablo Neira Ayuso | d7cdf81 | 2016-05-03 13:54:23 +0200 | [diff] [blame] | 1649 | |
Pablo Neira Ayuso | b301f25 | 2016-03-24 21:29:53 +0100 | [diff] [blame] | 1650 | get.name[sizeof(get.name) - 1] = '\0'; |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1651 | |
| 1652 | xt_compat_lock(AF_INET6); |
Alexey Dobriyan | 336b517 | 2008-01-31 04:03:45 -0800 | [diff] [blame] | 1653 | t = xt_find_table_lock(net, AF_INET6, get.name); |
YOSHIFUJI Hideaki / 吉藤英明 | 0cc8d8d | 2013-01-22 06:33:09 +0000 | [diff] [blame] | 1654 | if (!IS_ERR_OR_NULL(t)) { |
Jan Engelhardt | 5452e42 | 2008-04-14 11:15:35 +0200 | [diff] [blame] | 1655 | const struct xt_table_info *private = t->private; |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1656 | struct xt_table_info info; |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1657 | ret = compat_table_info(private, &info); |
Pablo Neira Ayuso | d7cdf81 | 2016-05-03 13:54:23 +0200 | [diff] [blame] | 1658 | if (!ret && get.size == info.size) |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1659 | ret = compat_copy_entries_to_user(private->size, |
| 1660 | t, uptr->entrytable); |
Pablo Neira Ayuso | d7cdf81 | 2016-05-03 13:54:23 +0200 | [diff] [blame] | 1661 | else if (!ret) |
Patrick McHardy | 544473c | 2008-04-14 11:15:45 +0200 | [diff] [blame] | 1662 | ret = -EAGAIN; |
Pablo Neira Ayuso | d7cdf81 | 2016-05-03 13:54:23 +0200 | [diff] [blame] | 1663 | |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1664 | xt_compat_flush_offsets(AF_INET6); |
| 1665 | module_put(t->me); |
| 1666 | xt_table_unlock(t); |
| 1667 | } else |
| 1668 | ret = t ? PTR_ERR(t) : -ENOENT; |
| 1669 | |
| 1670 | xt_compat_unlock(AF_INET6); |
| 1671 | return ret; |
| 1672 | } |
| 1673 | |
| 1674 | static int do_ip6t_get_ctl(struct sock *, int, void __user *, int *); |
| 1675 | |
| 1676 | static int |
| 1677 | compat_do_ip6t_get_ctl(struct sock *sk, int cmd, void __user *user, int *len) |
| 1678 | { |
| 1679 | int ret; |
| 1680 | |
Eric W. Biederman | af31f41 | 2012-11-16 03:03:06 +0000 | [diff] [blame] | 1681 | if (!ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN)) |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1682 | return -EPERM; |
| 1683 | |
| 1684 | switch (cmd) { |
| 1685 | case IP6T_SO_GET_INFO: |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 1686 | ret = get_info(sock_net(sk), user, len, 1); |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1687 | break; |
| 1688 | case IP6T_SO_GET_ENTRIES: |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 1689 | ret = compat_get_entries(sock_net(sk), user, len); |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1690 | break; |
| 1691 | default: |
| 1692 | ret = do_ip6t_get_ctl(sk, cmd, user, len); |
| 1693 | } |
| 1694 | return ret; |
| 1695 | } |
| 1696 | #endif |
| 1697 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1698 | static int |
| 1699 | do_ip6t_set_ctl(struct sock *sk, int cmd, void __user *user, unsigned int len) |
| 1700 | { |
| 1701 | int ret; |
| 1702 | |
Eric W. Biederman | af31f41 | 2012-11-16 03:03:06 +0000 | [diff] [blame] | 1703 | if (!ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1704 | return -EPERM; |
| 1705 | |
| 1706 | switch (cmd) { |
| 1707 | case IP6T_SO_SET_REPLACE: |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 1708 | ret = do_replace(sock_net(sk), user, len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1709 | break; |
| 1710 | |
| 1711 | case IP6T_SO_SET_ADD_COUNTERS: |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 1712 | ret = do_add_counters(sock_net(sk), user, len, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1713 | break; |
| 1714 | |
| 1715 | default: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1716 | ret = -EINVAL; |
| 1717 | } |
| 1718 | |
| 1719 | return ret; |
| 1720 | } |
| 1721 | |
| 1722 | static int |
| 1723 | do_ip6t_get_ctl(struct sock *sk, int cmd, void __user *user, int *len) |
| 1724 | { |
| 1725 | int ret; |
| 1726 | |
Eric W. Biederman | af31f41 | 2012-11-16 03:03:06 +0000 | [diff] [blame] | 1727 | if (!ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1728 | return -EPERM; |
| 1729 | |
| 1730 | switch (cmd) { |
Patrick McHardy | 433665c | 2007-12-17 21:50:05 -0800 | [diff] [blame] | 1731 | case IP6T_SO_GET_INFO: |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 1732 | ret = get_info(sock_net(sk), user, len, 0); |
Patrick McHardy | 433665c | 2007-12-17 21:50:05 -0800 | [diff] [blame] | 1733 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1734 | |
Patrick McHardy | d924357 | 2007-12-17 21:50:22 -0800 | [diff] [blame] | 1735 | case IP6T_SO_GET_ENTRIES: |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 1736 | ret = get_entries(sock_net(sk), user, len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1737 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1738 | |
Harald Welte | 6b7d31f | 2005-10-26 09:34:24 +0200 | [diff] [blame] | 1739 | case IP6T_SO_GET_REVISION_MATCH: |
| 1740 | case IP6T_SO_GET_REVISION_TARGET: { |
Jan Engelhardt | 12b00c2 | 2010-10-13 15:56:56 +0200 | [diff] [blame] | 1741 | struct xt_get_revision rev; |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 1742 | int target; |
Harald Welte | 6b7d31f | 2005-10-26 09:34:24 +0200 | [diff] [blame] | 1743 | |
| 1744 | if (*len != sizeof(rev)) { |
| 1745 | ret = -EINVAL; |
| 1746 | break; |
| 1747 | } |
| 1748 | if (copy_from_user(&rev, user, sizeof(rev)) != 0) { |
| 1749 | ret = -EFAULT; |
| 1750 | break; |
| 1751 | } |
Vasiliy Kulikov | 6a8ab060 | 2011-03-15 13:37:13 +0100 | [diff] [blame] | 1752 | rev.name[sizeof(rev.name)-1] = 0; |
Harald Welte | 6b7d31f | 2005-10-26 09:34:24 +0200 | [diff] [blame] | 1753 | |
| 1754 | if (cmd == IP6T_SO_GET_REVISION_TARGET) |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 1755 | target = 1; |
Harald Welte | 6b7d31f | 2005-10-26 09:34:24 +0200 | [diff] [blame] | 1756 | else |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 1757 | target = 0; |
Harald Welte | 6b7d31f | 2005-10-26 09:34:24 +0200 | [diff] [blame] | 1758 | |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 1759 | try_then_request_module(xt_find_revision(AF_INET6, rev.name, |
| 1760 | rev.revision, |
| 1761 | target, &ret), |
Harald Welte | 6b7d31f | 2005-10-26 09:34:24 +0200 | [diff] [blame] | 1762 | "ip6t_%s", rev.name); |
| 1763 | break; |
| 1764 | } |
| 1765 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1766 | default: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1767 | ret = -EINVAL; |
| 1768 | } |
| 1769 | |
| 1770 | return ret; |
| 1771 | } |
| 1772 | |
Florian Westphal | b9e69e1 | 2016-02-25 10:08:36 +0100 | [diff] [blame] | 1773 | static void __ip6t_unregister_table(struct net *net, struct xt_table *table) |
| 1774 | { |
| 1775 | struct xt_table_info *private; |
| 1776 | void *loc_cpu_entry; |
| 1777 | struct module *table_owner = table->me; |
| 1778 | struct ip6t_entry *iter; |
| 1779 | |
| 1780 | private = xt_unregister_table(table); |
| 1781 | |
| 1782 | /* Decrease module usage counts and free resources */ |
| 1783 | loc_cpu_entry = private->entries; |
| 1784 | xt_entry_foreach(iter, loc_cpu_entry, private->size) |
| 1785 | cleanup_entry(iter, net); |
| 1786 | if (private->number > private->initial_entries) |
| 1787 | module_put(table_owner); |
| 1788 | xt_free_table_info(private); |
| 1789 | } |
| 1790 | |
Florian Westphal | a67dd26 | 2016-02-25 10:08:35 +0100 | [diff] [blame] | 1791 | int ip6t_register_table(struct net *net, const struct xt_table *table, |
| 1792 | const struct ip6t_replace *repl, |
| 1793 | const struct nf_hook_ops *ops, |
| 1794 | struct xt_table **res) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1795 | { |
| 1796 | int ret; |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 1797 | struct xt_table_info *newinfo; |
Jan Engelhardt | f3c5c1b | 2010-04-19 16:05:10 +0200 | [diff] [blame] | 1798 | struct xt_table_info bootstrap = {0}; |
Eric Dumazet | 3183606 | 2005-12-13 23:13:48 -0800 | [diff] [blame] | 1799 | void *loc_cpu_entry; |
Alexey Dobriyan | a98da11 | 2008-01-31 04:01:49 -0800 | [diff] [blame] | 1800 | struct xt_table *new_table; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1801 | |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 1802 | newinfo = xt_alloc_table_info(repl->size); |
Florian Westphal | a67dd26 | 2016-02-25 10:08:35 +0100 | [diff] [blame] | 1803 | if (!newinfo) |
| 1804 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1805 | |
Florian Westphal | 482cfc3 | 2015-06-11 01:34:55 +0200 | [diff] [blame] | 1806 | loc_cpu_entry = newinfo->entries; |
Eric Dumazet | 3183606 | 2005-12-13 23:13:48 -0800 | [diff] [blame] | 1807 | memcpy(loc_cpu_entry, repl->entries, repl->size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1808 | |
Jan Engelhardt | 0f23421 | 2010-02-24 18:36:04 +0100 | [diff] [blame] | 1809 | ret = translate_table(net, newinfo, loc_cpu_entry, repl); |
Alexey Dobriyan | 44d34e7 | 2008-01-31 04:02:44 -0800 | [diff] [blame] | 1810 | if (ret != 0) |
| 1811 | goto out_free; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1812 | |
Alexey Dobriyan | 336b517 | 2008-01-31 04:03:45 -0800 | [diff] [blame] | 1813 | new_table = xt_register_table(net, table, &bootstrap, newinfo); |
Alexey Dobriyan | a98da11 | 2008-01-31 04:01:49 -0800 | [diff] [blame] | 1814 | if (IS_ERR(new_table)) { |
Alexey Dobriyan | 44d34e7 | 2008-01-31 04:02:44 -0800 | [diff] [blame] | 1815 | ret = PTR_ERR(new_table); |
| 1816 | goto out_free; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1817 | } |
Florian Westphal | a67dd26 | 2016-02-25 10:08:35 +0100 | [diff] [blame] | 1818 | |
Florian Westphal | b9e69e1 | 2016-02-25 10:08:36 +0100 | [diff] [blame] | 1819 | /* set res now, will see skbs right after nf_register_net_hooks */ |
Florian Westphal | a67dd26 | 2016-02-25 10:08:35 +0100 | [diff] [blame] | 1820 | WRITE_ONCE(*res, new_table); |
Florian Westphal | b9e69e1 | 2016-02-25 10:08:36 +0100 | [diff] [blame] | 1821 | |
| 1822 | ret = nf_register_net_hooks(net, ops, hweight32(table->valid_hooks)); |
| 1823 | if (ret != 0) { |
| 1824 | __ip6t_unregister_table(net, new_table); |
| 1825 | *res = NULL; |
| 1826 | } |
| 1827 | |
Florian Westphal | a67dd26 | 2016-02-25 10:08:35 +0100 | [diff] [blame] | 1828 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1829 | |
Alexey Dobriyan | 44d34e7 | 2008-01-31 04:02:44 -0800 | [diff] [blame] | 1830 | out_free: |
| 1831 | xt_free_table_info(newinfo); |
Florian Westphal | a67dd26 | 2016-02-25 10:08:35 +0100 | [diff] [blame] | 1832 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1833 | } |
| 1834 | |
Florian Westphal | a67dd26 | 2016-02-25 10:08:35 +0100 | [diff] [blame] | 1835 | void ip6t_unregister_table(struct net *net, struct xt_table *table, |
| 1836 | const struct nf_hook_ops *ops) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1837 | { |
Florian Westphal | b9e69e1 | 2016-02-25 10:08:36 +0100 | [diff] [blame] | 1838 | nf_unregister_net_hooks(net, ops, hweight32(table->valid_hooks)); |
| 1839 | __ip6t_unregister_table(net, table); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1840 | } |
| 1841 | |
| 1842 | /* Returns 1 if the type and code is matched by the range, 0 otherwise */ |
Jan Engelhardt | ccb79bd | 2007-07-07 22:16:00 -0700 | [diff] [blame] | 1843 | static inline bool |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1844 | icmp6_type_code_match(u_int8_t test_type, u_int8_t min_code, u_int8_t max_code, |
| 1845 | u_int8_t type, u_int8_t code, |
Jan Engelhardt | ccb79bd | 2007-07-07 22:16:00 -0700 | [diff] [blame] | 1846 | bool invert) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1847 | { |
| 1848 | return (type == test_type && code >= min_code && code <= max_code) |
| 1849 | ^ invert; |
| 1850 | } |
| 1851 | |
Jan Engelhardt | 1d93a9c | 2007-07-07 22:15:35 -0700 | [diff] [blame] | 1852 | static bool |
Jan Engelhardt | 62fc805 | 2009-07-07 20:42:08 +0200 | [diff] [blame] | 1853 | icmp6_match(const struct sk_buff *skb, struct xt_action_param *par) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1854 | { |
Jan Engelhardt | 5452e42 | 2008-04-14 11:15:35 +0200 | [diff] [blame] | 1855 | const struct icmp6hdr *ic; |
| 1856 | struct icmp6hdr _icmph; |
Jan Engelhardt | f7108a2 | 2008-10-08 11:35:18 +0200 | [diff] [blame] | 1857 | const struct ip6t_icmp *icmpinfo = par->matchinfo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1858 | |
| 1859 | /* Must not be a fragment. */ |
Jan Engelhardt | f7108a2 | 2008-10-08 11:35:18 +0200 | [diff] [blame] | 1860 | if (par->fragoff != 0) |
Jan Engelhardt | 1d93a9c | 2007-07-07 22:15:35 -0700 | [diff] [blame] | 1861 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1862 | |
Jan Engelhardt | f7108a2 | 2008-10-08 11:35:18 +0200 | [diff] [blame] | 1863 | ic = skb_header_pointer(skb, par->thoff, sizeof(_icmph), &_icmph); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1864 | if (ic == NULL) { |
| 1865 | /* We've been asked to examine this packet, and we |
Patrick McHardy | 9c54795 | 2007-12-17 21:52:00 -0800 | [diff] [blame] | 1866 | * can't. Hence, no choice but to drop. |
| 1867 | */ |
Jan Engelhardt | b4ba261 | 2009-07-07 20:54:30 +0200 | [diff] [blame] | 1868 | par->hotdrop = true; |
Jan Engelhardt | 1d93a9c | 2007-07-07 22:15:35 -0700 | [diff] [blame] | 1869 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1870 | } |
| 1871 | |
| 1872 | return icmp6_type_code_match(icmpinfo->type, |
| 1873 | icmpinfo->code[0], |
| 1874 | icmpinfo->code[1], |
| 1875 | ic->icmp6_type, ic->icmp6_code, |
| 1876 | !!(icmpinfo->invflags&IP6T_ICMP_INV)); |
| 1877 | } |
| 1878 | |
| 1879 | /* Called when user tries to insert an entry of this type. */ |
Jan Engelhardt | b0f3845 | 2010-03-19 17:16:42 +0100 | [diff] [blame] | 1880 | static int icmp6_checkentry(const struct xt_mtchk_param *par) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1881 | { |
Jan Engelhardt | 9b4fce7 | 2008-10-08 11:35:18 +0200 | [diff] [blame] | 1882 | const struct ip6t_icmp *icmpinfo = par->matchinfo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1883 | |
Patrick McHardy | 7f93971 | 2006-03-20 18:01:43 -0800 | [diff] [blame] | 1884 | /* Must specify no unknown invflags */ |
Jan Engelhardt | bd414ee | 2010-03-23 16:35:56 +0100 | [diff] [blame] | 1885 | return (icmpinfo->invflags & ~IP6T_ICMP_INV) ? -EINVAL : 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1886 | } |
| 1887 | |
| 1888 | /* The built-in targets: standard (NULL) and error. */ |
Jan Engelhardt | 4538506 | 2009-07-04 12:50:00 +0200 | [diff] [blame] | 1889 | static struct xt_target ip6t_builtin_tg[] __read_mostly = { |
| 1890 | { |
Jan Engelhardt | 243bf6e | 2010-10-13 16:28:00 +0200 | [diff] [blame] | 1891 | .name = XT_STANDARD_TARGET, |
Jan Engelhardt | 4538506 | 2009-07-04 12:50:00 +0200 | [diff] [blame] | 1892 | .targetsize = sizeof(int), |
| 1893 | .family = NFPROTO_IPV6, |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1894 | #ifdef CONFIG_COMPAT |
Jan Engelhardt | 4538506 | 2009-07-04 12:50:00 +0200 | [diff] [blame] | 1895 | .compatsize = sizeof(compat_int_t), |
| 1896 | .compat_from_user = compat_standard_from_user, |
| 1897 | .compat_to_user = compat_standard_to_user, |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1898 | #endif |
Jan Engelhardt | 4538506 | 2009-07-04 12:50:00 +0200 | [diff] [blame] | 1899 | }, |
| 1900 | { |
Jan Engelhardt | 243bf6e | 2010-10-13 16:28:00 +0200 | [diff] [blame] | 1901 | .name = XT_ERROR_TARGET, |
Jan Engelhardt | 4538506 | 2009-07-04 12:50:00 +0200 | [diff] [blame] | 1902 | .target = ip6t_error, |
Jan Engelhardt | 12b00c2 | 2010-10-13 15:56:56 +0200 | [diff] [blame] | 1903 | .targetsize = XT_FUNCTION_MAXNAMELEN, |
Jan Engelhardt | 4538506 | 2009-07-04 12:50:00 +0200 | [diff] [blame] | 1904 | .family = NFPROTO_IPV6, |
| 1905 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1906 | }; |
| 1907 | |
| 1908 | static struct nf_sockopt_ops ip6t_sockopts = { |
| 1909 | .pf = PF_INET6, |
| 1910 | .set_optmin = IP6T_BASE_CTL, |
| 1911 | .set_optmax = IP6T_SO_SET_MAX+1, |
| 1912 | .set = do_ip6t_set_ctl, |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1913 | #ifdef CONFIG_COMPAT |
| 1914 | .compat_set = compat_do_ip6t_set_ctl, |
| 1915 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1916 | .get_optmin = IP6T_BASE_CTL, |
| 1917 | .get_optmax = IP6T_SO_GET_MAX+1, |
| 1918 | .get = do_ip6t_get_ctl, |
Patrick McHardy | 3bc3fe5 | 2007-12-17 21:50:37 -0800 | [diff] [blame] | 1919 | #ifdef CONFIG_COMPAT |
| 1920 | .compat_get = compat_do_ip6t_get_ctl, |
| 1921 | #endif |
Neil Horman | 16fcec3 | 2007-09-11 11:28:26 +0200 | [diff] [blame] | 1922 | .owner = THIS_MODULE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1923 | }; |
| 1924 | |
Jan Engelhardt | 4538506 | 2009-07-04 12:50:00 +0200 | [diff] [blame] | 1925 | static struct xt_match ip6t_builtin_mt[] __read_mostly = { |
| 1926 | { |
| 1927 | .name = "icmp6", |
| 1928 | .match = icmp6_match, |
| 1929 | .matchsize = sizeof(struct ip6t_icmp), |
| 1930 | .checkentry = icmp6_checkentry, |
| 1931 | .proto = IPPROTO_ICMPV6, |
| 1932 | .family = NFPROTO_IPV6, |
| 1933 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1934 | }; |
| 1935 | |
Alexey Dobriyan | 3cb609d | 2008-01-31 04:49:35 -0800 | [diff] [blame] | 1936 | static int __net_init ip6_tables_net_init(struct net *net) |
| 1937 | { |
Jan Engelhardt | 383ca5b | 2009-04-14 14:24:21 +0200 | [diff] [blame] | 1938 | return xt_proto_init(net, NFPROTO_IPV6); |
Alexey Dobriyan | 3cb609d | 2008-01-31 04:49:35 -0800 | [diff] [blame] | 1939 | } |
| 1940 | |
| 1941 | static void __net_exit ip6_tables_net_exit(struct net *net) |
| 1942 | { |
Jan Engelhardt | 383ca5b | 2009-04-14 14:24:21 +0200 | [diff] [blame] | 1943 | xt_proto_fini(net, NFPROTO_IPV6); |
Alexey Dobriyan | 3cb609d | 2008-01-31 04:49:35 -0800 | [diff] [blame] | 1944 | } |
| 1945 | |
| 1946 | static struct pernet_operations ip6_tables_net_ops = { |
| 1947 | .init = ip6_tables_net_init, |
| 1948 | .exit = ip6_tables_net_exit, |
| 1949 | }; |
| 1950 | |
Andrew Morton | 65b4b4e | 2006-03-28 16:37:06 -0800 | [diff] [blame] | 1951 | static int __init ip6_tables_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1952 | { |
| 1953 | int ret; |
| 1954 | |
Alexey Dobriyan | 3cb609d | 2008-01-31 04:49:35 -0800 | [diff] [blame] | 1955 | ret = register_pernet_subsys(&ip6_tables_net_ops); |
Patrick McHardy | 0eff66e | 2006-08-13 18:57:28 -0700 | [diff] [blame] | 1956 | if (ret < 0) |
| 1957 | goto err1; |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 1958 | |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 1959 | /* No one else will be downing sem now, so we won't sleep */ |
Jan Engelhardt | 4538506 | 2009-07-04 12:50:00 +0200 | [diff] [blame] | 1960 | ret = xt_register_targets(ip6t_builtin_tg, ARRAY_SIZE(ip6t_builtin_tg)); |
Patrick McHardy | 0eff66e | 2006-08-13 18:57:28 -0700 | [diff] [blame] | 1961 | if (ret < 0) |
| 1962 | goto err2; |
Jan Engelhardt | 4538506 | 2009-07-04 12:50:00 +0200 | [diff] [blame] | 1963 | ret = xt_register_matches(ip6t_builtin_mt, ARRAY_SIZE(ip6t_builtin_mt)); |
Patrick McHardy | 0eff66e | 2006-08-13 18:57:28 -0700 | [diff] [blame] | 1964 | if (ret < 0) |
| 1965 | goto err4; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1966 | |
| 1967 | /* Register setsockopt */ |
| 1968 | ret = nf_register_sockopt(&ip6t_sockopts); |
Patrick McHardy | 0eff66e | 2006-08-13 18:57:28 -0700 | [diff] [blame] | 1969 | if (ret < 0) |
| 1970 | goto err5; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1971 | |
Jan Engelhardt | ff67e4e | 2010-03-19 21:08:16 +0100 | [diff] [blame] | 1972 | pr_info("(C) 2000-2006 Netfilter Core Team\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1973 | return 0; |
Patrick McHardy | 0eff66e | 2006-08-13 18:57:28 -0700 | [diff] [blame] | 1974 | |
| 1975 | err5: |
Jan Engelhardt | 4538506 | 2009-07-04 12:50:00 +0200 | [diff] [blame] | 1976 | xt_unregister_matches(ip6t_builtin_mt, ARRAY_SIZE(ip6t_builtin_mt)); |
Patrick McHardy | 0eff66e | 2006-08-13 18:57:28 -0700 | [diff] [blame] | 1977 | err4: |
Jan Engelhardt | 4538506 | 2009-07-04 12:50:00 +0200 | [diff] [blame] | 1978 | xt_unregister_targets(ip6t_builtin_tg, ARRAY_SIZE(ip6t_builtin_tg)); |
Patrick McHardy | 0eff66e | 2006-08-13 18:57:28 -0700 | [diff] [blame] | 1979 | err2: |
Alexey Dobriyan | 3cb609d | 2008-01-31 04:49:35 -0800 | [diff] [blame] | 1980 | unregister_pernet_subsys(&ip6_tables_net_ops); |
Patrick McHardy | 0eff66e | 2006-08-13 18:57:28 -0700 | [diff] [blame] | 1981 | err1: |
| 1982 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1983 | } |
| 1984 | |
Andrew Morton | 65b4b4e | 2006-03-28 16:37:06 -0800 | [diff] [blame] | 1985 | static void __exit ip6_tables_fini(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1986 | { |
| 1987 | nf_unregister_sockopt(&ip6t_sockopts); |
Patrick McHardy | 9c54795 | 2007-12-17 21:52:00 -0800 | [diff] [blame] | 1988 | |
Jan Engelhardt | 4538506 | 2009-07-04 12:50:00 +0200 | [diff] [blame] | 1989 | xt_unregister_matches(ip6t_builtin_mt, ARRAY_SIZE(ip6t_builtin_mt)); |
| 1990 | xt_unregister_targets(ip6t_builtin_tg, ARRAY_SIZE(ip6t_builtin_tg)); |
Alexey Dobriyan | 3cb609d | 2008-01-31 04:49:35 -0800 | [diff] [blame] | 1991 | unregister_pernet_subsys(&ip6_tables_net_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1992 | } |
| 1993 | |
| 1994 | EXPORT_SYMBOL(ip6t_register_table); |
| 1995 | EXPORT_SYMBOL(ip6t_unregister_table); |
| 1996 | EXPORT_SYMBOL(ip6t_do_table); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1997 | |
Andrew Morton | 65b4b4e | 2006-03-28 16:37:06 -0800 | [diff] [blame] | 1998 | module_init(ip6_tables_init); |
| 1999 | module_exit(ip6_tables_fini); |