Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1 | /* Connection tracking via netlink socket. Allows for user space |
| 2 | * protocol helpers and general trouble making from userspace. |
| 3 | * |
| 4 | * (C) 2001 by Jay Schulist <jschlst@samba.org> |
Harald Welte | dc808fe | 2006-03-20 17:56:32 -0800 | [diff] [blame] | 5 | * (C) 2002-2006 by Harald Welte <laforge@gnumonks.org> |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 6 | * (C) 2003 by Patrick Mchardy <kaber@trash.net> |
Pablo Neira Ayuso | 0adf9d6 | 2008-06-09 15:56:20 -0700 | [diff] [blame] | 7 | * (C) 2005-2008 by Pablo Neira Ayuso <pablo@netfilter.org> |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 8 | * |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 9 | * Initial connection tracking via netlink development funded and |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 10 | * generally made possible by Network Robots, Inc. (www.networkrobots.com) |
| 11 | * |
| 12 | * Further development of this code funded by Astaro AG (http://www.astaro.com) |
| 13 | * |
| 14 | * This software may be used and distributed according to the terms |
| 15 | * of the GNU General Public License, incorporated herein by reference. |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 16 | */ |
| 17 | |
| 18 | #include <linux/init.h> |
| 19 | #include <linux/module.h> |
| 20 | #include <linux/kernel.h> |
Ingo Molnar | 711bbdd | 2008-05-17 08:26:25 +0200 | [diff] [blame] | 21 | #include <linux/rculist.h> |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 22 | #include <linux/types.h> |
| 23 | #include <linux/timer.h> |
| 24 | #include <linux/skbuff.h> |
| 25 | #include <linux/errno.h> |
| 26 | #include <linux/netlink.h> |
| 27 | #include <linux/spinlock.h> |
Yasuyuki Kozakai | 40a839f | 2006-06-27 03:00:35 -0700 | [diff] [blame] | 28 | #include <linux/interrupt.h> |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 29 | #include <linux/notifier.h> |
| 30 | |
| 31 | #include <linux/netfilter.h> |
Arnaldo Carvalho de Melo | dc5fc57 | 2007-03-25 23:06:12 -0700 | [diff] [blame] | 32 | #include <net/netlink.h> |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 33 | #include <net/netfilter/nf_conntrack.h> |
| 34 | #include <net/netfilter/nf_conntrack_core.h> |
Martin Josefsson | 77ab9cf | 2006-11-29 02:34:58 +0100 | [diff] [blame] | 35 | #include <net/netfilter/nf_conntrack_expect.h> |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 36 | #include <net/netfilter/nf_conntrack_helper.h> |
| 37 | #include <net/netfilter/nf_conntrack_l3proto.h> |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 38 | #include <net/netfilter/nf_conntrack_l4proto.h> |
Jozsef Kadlecsik | 5b1158e | 2006-12-02 22:07:13 -0800 | [diff] [blame] | 39 | #include <net/netfilter/nf_conntrack_tuple.h> |
Krzysztof Piotr Oledzki | 5840157 | 2008-07-21 10:01:34 -0700 | [diff] [blame] | 40 | #include <net/netfilter/nf_conntrack_acct.h> |
Jozsef Kadlecsik | 5b1158e | 2006-12-02 22:07:13 -0800 | [diff] [blame] | 41 | #ifdef CONFIG_NF_NAT_NEEDED |
| 42 | #include <net/netfilter/nf_nat_core.h> |
| 43 | #include <net/netfilter/nf_nat_protocol.h> |
| 44 | #endif |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 45 | |
| 46 | #include <linux/netfilter/nfnetlink.h> |
| 47 | #include <linux/netfilter/nfnetlink_conntrack.h> |
| 48 | |
| 49 | MODULE_LICENSE("GPL"); |
| 50 | |
Harald Welte | dc808fe | 2006-03-20 17:56:32 -0800 | [diff] [blame] | 51 | static char __initdata version[] = "0.93"; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 52 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 53 | static inline int |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 54 | ctnetlink_dump_tuples_proto(struct sk_buff *skb, |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 55 | const struct nf_conntrack_tuple *tuple, |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 56 | struct nf_conntrack_l4proto *l4proto) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 57 | { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 58 | int ret = 0; |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 59 | struct nlattr *nest_parms; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 60 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 61 | nest_parms = nla_nest_start(skb, CTA_TUPLE_PROTO | NLA_F_NESTED); |
| 62 | if (!nest_parms) |
| 63 | goto nla_put_failure; |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 64 | NLA_PUT_U8(skb, CTA_PROTO_NUM, tuple->dst.protonum); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 65 | |
Patrick McHardy | fdf7083 | 2007-09-28 14:37:41 -0700 | [diff] [blame] | 66 | if (likely(l4proto->tuple_to_nlattr)) |
| 67 | ret = l4proto->tuple_to_nlattr(skb, tuple); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 68 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 69 | nla_nest_end(skb, nest_parms); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 70 | |
| 71 | return ret; |
| 72 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 73 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 74 | return -1; |
| 75 | } |
| 76 | |
| 77 | static inline int |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 78 | ctnetlink_dump_tuples_ip(struct sk_buff *skb, |
| 79 | const struct nf_conntrack_tuple *tuple, |
| 80 | struct nf_conntrack_l3proto *l3proto) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 81 | { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 82 | int ret = 0; |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 83 | struct nlattr *nest_parms; |
| 84 | |
| 85 | nest_parms = nla_nest_start(skb, CTA_TUPLE_IP | NLA_F_NESTED); |
| 86 | if (!nest_parms) |
| 87 | goto nla_put_failure; |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 88 | |
Patrick McHardy | fdf7083 | 2007-09-28 14:37:41 -0700 | [diff] [blame] | 89 | if (likely(l3proto->tuple_to_nlattr)) |
| 90 | ret = l3proto->tuple_to_nlattr(skb, tuple); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 91 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 92 | nla_nest_end(skb, nest_parms); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 93 | |
| 94 | return ret; |
| 95 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 96 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 97 | return -1; |
| 98 | } |
| 99 | |
Ilpo Järvinen | bb5cf80 | 2008-01-05 23:11:31 -0800 | [diff] [blame] | 100 | static int |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 101 | ctnetlink_dump_tuples(struct sk_buff *skb, |
| 102 | const struct nf_conntrack_tuple *tuple) |
| 103 | { |
| 104 | int ret; |
| 105 | struct nf_conntrack_l3proto *l3proto; |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 106 | struct nf_conntrack_l4proto *l4proto; |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 107 | |
| 108 | l3proto = nf_ct_l3proto_find_get(tuple->src.l3num); |
| 109 | ret = ctnetlink_dump_tuples_ip(skb, tuple, l3proto); |
| 110 | nf_ct_l3proto_put(l3proto); |
| 111 | |
| 112 | if (unlikely(ret < 0)) |
| 113 | return ret; |
| 114 | |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 115 | l4proto = nf_ct_l4proto_find_get(tuple->src.l3num, tuple->dst.protonum); |
| 116 | ret = ctnetlink_dump_tuples_proto(skb, tuple, l4proto); |
| 117 | nf_ct_l4proto_put(l4proto); |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 118 | |
| 119 | return ret; |
| 120 | } |
| 121 | |
| 122 | static inline int |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 123 | ctnetlink_dump_status(struct sk_buff *skb, const struct nf_conn *ct) |
| 124 | { |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 125 | NLA_PUT_BE32(skb, CTA_STATUS, htonl(ct->status)); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 126 | return 0; |
| 127 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 128 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 129 | return -1; |
| 130 | } |
| 131 | |
| 132 | static inline int |
| 133 | ctnetlink_dump_timeout(struct sk_buff *skb, const struct nf_conn *ct) |
| 134 | { |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 135 | long timeout = (ct->timeout.expires - jiffies) / HZ; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 136 | |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 137 | if (timeout < 0) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 138 | timeout = 0; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 139 | |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 140 | NLA_PUT_BE32(skb, CTA_TIMEOUT, htonl(timeout)); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 141 | return 0; |
| 142 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 143 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 144 | return -1; |
| 145 | } |
| 146 | |
| 147 | static inline int |
| 148 | ctnetlink_dump_protoinfo(struct sk_buff *skb, const struct nf_conn *ct) |
| 149 | { |
Patrick McHardy | 5e8fbe2 | 2008-04-14 11:15:52 +0200 | [diff] [blame] | 150 | struct nf_conntrack_l4proto *l4proto; |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 151 | struct nlattr *nest_proto; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 152 | int ret; |
| 153 | |
Patrick McHardy | 5e8fbe2 | 2008-04-14 11:15:52 +0200 | [diff] [blame] | 154 | l4proto = nf_ct_l4proto_find_get(nf_ct_l3num(ct), nf_ct_protonum(ct)); |
Patrick McHardy | fdf7083 | 2007-09-28 14:37:41 -0700 | [diff] [blame] | 155 | if (!l4proto->to_nlattr) { |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 156 | nf_ct_l4proto_put(l4proto); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 157 | return 0; |
| 158 | } |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 159 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 160 | nest_proto = nla_nest_start(skb, CTA_PROTOINFO | NLA_F_NESTED); |
| 161 | if (!nest_proto) |
| 162 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 163 | |
Patrick McHardy | fdf7083 | 2007-09-28 14:37:41 -0700 | [diff] [blame] | 164 | ret = l4proto->to_nlattr(skb, nest_proto, ct); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 165 | |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 166 | nf_ct_l4proto_put(l4proto); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 167 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 168 | nla_nest_end(skb, nest_proto); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 169 | |
| 170 | return ret; |
| 171 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 172 | nla_put_failure: |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 173 | nf_ct_l4proto_put(l4proto); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 174 | return -1; |
| 175 | } |
| 176 | |
| 177 | static inline int |
| 178 | ctnetlink_dump_helpinfo(struct sk_buff *skb, const struct nf_conn *ct) |
| 179 | { |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 180 | struct nlattr *nest_helper; |
Harald Welte | dc808fe | 2006-03-20 17:56:32 -0800 | [diff] [blame] | 181 | const struct nf_conn_help *help = nfct_help(ct); |
Patrick McHarrdy | 3c158f7 | 2007-06-05 12:55:27 -0700 | [diff] [blame] | 182 | struct nf_conntrack_helper *helper; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 183 | |
Patrick McHarrdy | 3c158f7 | 2007-06-05 12:55:27 -0700 | [diff] [blame] | 184 | if (!help) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 185 | return 0; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 186 | |
Patrick McHarrdy | 3c158f7 | 2007-06-05 12:55:27 -0700 | [diff] [blame] | 187 | rcu_read_lock(); |
| 188 | helper = rcu_dereference(help->helper); |
| 189 | if (!helper) |
| 190 | goto out; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 191 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 192 | nest_helper = nla_nest_start(skb, CTA_HELP | NLA_F_NESTED); |
| 193 | if (!nest_helper) |
| 194 | goto nla_put_failure; |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 195 | NLA_PUT_STRING(skb, CTA_HELP_NAME, helper->name); |
Patrick McHarrdy | 3c158f7 | 2007-06-05 12:55:27 -0700 | [diff] [blame] | 196 | |
Patrick McHardy | fdf7083 | 2007-09-28 14:37:41 -0700 | [diff] [blame] | 197 | if (helper->to_nlattr) |
| 198 | helper->to_nlattr(skb, ct); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 199 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 200 | nla_nest_end(skb, nest_helper); |
Patrick McHarrdy | 3c158f7 | 2007-06-05 12:55:27 -0700 | [diff] [blame] | 201 | out: |
| 202 | rcu_read_unlock(); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 203 | return 0; |
| 204 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 205 | nla_put_failure: |
Patrick McHarrdy | 3c158f7 | 2007-06-05 12:55:27 -0700 | [diff] [blame] | 206 | rcu_read_unlock(); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 207 | return -1; |
| 208 | } |
| 209 | |
Ilpo Järvinen | bb5cf80 | 2008-01-05 23:11:31 -0800 | [diff] [blame] | 210 | static int |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 211 | ctnetlink_dump_counters(struct sk_buff *skb, const struct nf_conn *ct, |
| 212 | enum ip_conntrack_dir dir) |
| 213 | { |
| 214 | enum ctattr_type type = dir ? CTA_COUNTERS_REPLY: CTA_COUNTERS_ORIG; |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 215 | struct nlattr *nest_count; |
Krzysztof Piotr Oledzki | 5840157 | 2008-07-21 10:01:34 -0700 | [diff] [blame] | 216 | const struct nf_conn_counter *acct; |
| 217 | |
| 218 | acct = nf_conn_acct_find(ct); |
| 219 | if (!acct) |
| 220 | return 0; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 221 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 222 | nest_count = nla_nest_start(skb, type | NLA_F_NESTED); |
| 223 | if (!nest_count) |
| 224 | goto nla_put_failure; |
| 225 | |
Krzysztof Piotr Oledzki | 5840157 | 2008-07-21 10:01:34 -0700 | [diff] [blame] | 226 | NLA_PUT_BE64(skb, CTA_COUNTERS_PACKETS, |
| 227 | cpu_to_be64(acct[dir].packets)); |
| 228 | NLA_PUT_BE64(skb, CTA_COUNTERS_BYTES, |
| 229 | cpu_to_be64(acct[dir].bytes)); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 230 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 231 | nla_nest_end(skb, nest_count); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 232 | |
| 233 | return 0; |
| 234 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 235 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 236 | return -1; |
| 237 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 238 | |
| 239 | #ifdef CONFIG_NF_CONNTRACK_MARK |
| 240 | static inline int |
| 241 | ctnetlink_dump_mark(struct sk_buff *skb, const struct nf_conn *ct) |
| 242 | { |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 243 | NLA_PUT_BE32(skb, CTA_MARK, htonl(ct->mark)); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 244 | return 0; |
| 245 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 246 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 247 | return -1; |
| 248 | } |
| 249 | #else |
| 250 | #define ctnetlink_dump_mark(a, b) (0) |
| 251 | #endif |
| 252 | |
Pablo Neira Ayuso | 37fccd8 | 2007-12-17 22:28:41 -0800 | [diff] [blame] | 253 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
| 254 | static inline int |
| 255 | ctnetlink_dump_secmark(struct sk_buff *skb, const struct nf_conn *ct) |
| 256 | { |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 257 | NLA_PUT_BE32(skb, CTA_SECMARK, htonl(ct->secmark)); |
Pablo Neira Ayuso | 37fccd8 | 2007-12-17 22:28:41 -0800 | [diff] [blame] | 258 | return 0; |
| 259 | |
| 260 | nla_put_failure: |
| 261 | return -1; |
| 262 | } |
| 263 | #else |
| 264 | #define ctnetlink_dump_secmark(a, b) (0) |
| 265 | #endif |
| 266 | |
Pablo Neira Ayuso | 0f417ce | 2007-12-17 22:28:19 -0800 | [diff] [blame] | 267 | #define master_tuple(ct) &(ct->master->tuplehash[IP_CT_DIR_ORIGINAL].tuple) |
| 268 | |
| 269 | static inline int |
| 270 | ctnetlink_dump_master(struct sk_buff *skb, const struct nf_conn *ct) |
| 271 | { |
| 272 | struct nlattr *nest_parms; |
| 273 | |
| 274 | if (!(ct->status & IPS_EXPECTED)) |
| 275 | return 0; |
| 276 | |
| 277 | nest_parms = nla_nest_start(skb, CTA_TUPLE_MASTER | NLA_F_NESTED); |
| 278 | if (!nest_parms) |
| 279 | goto nla_put_failure; |
| 280 | if (ctnetlink_dump_tuples(skb, master_tuple(ct)) < 0) |
| 281 | goto nla_put_failure; |
| 282 | nla_nest_end(skb, nest_parms); |
| 283 | |
| 284 | return 0; |
| 285 | |
| 286 | nla_put_failure: |
| 287 | return -1; |
| 288 | } |
| 289 | |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 290 | #ifdef CONFIG_NF_NAT_NEEDED |
Ilpo Järvinen | bb5cf80 | 2008-01-05 23:11:31 -0800 | [diff] [blame] | 291 | static int |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 292 | dump_nat_seq_adj(struct sk_buff *skb, const struct nf_nat_seq *natseq, int type) |
| 293 | { |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 294 | struct nlattr *nest_parms; |
| 295 | |
| 296 | nest_parms = nla_nest_start(skb, type | NLA_F_NESTED); |
| 297 | if (!nest_parms) |
| 298 | goto nla_put_failure; |
| 299 | |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 300 | NLA_PUT_BE32(skb, CTA_NAT_SEQ_CORRECTION_POS, |
| 301 | htonl(natseq->correction_pos)); |
| 302 | NLA_PUT_BE32(skb, CTA_NAT_SEQ_OFFSET_BEFORE, |
| 303 | htonl(natseq->offset_before)); |
| 304 | NLA_PUT_BE32(skb, CTA_NAT_SEQ_OFFSET_AFTER, |
| 305 | htonl(natseq->offset_after)); |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 306 | |
| 307 | nla_nest_end(skb, nest_parms); |
| 308 | |
| 309 | return 0; |
| 310 | |
| 311 | nla_put_failure: |
| 312 | return -1; |
| 313 | } |
| 314 | |
| 315 | static inline int |
| 316 | ctnetlink_dump_nat_seq_adj(struct sk_buff *skb, const struct nf_conn *ct) |
| 317 | { |
| 318 | struct nf_nat_seq *natseq; |
| 319 | struct nf_conn_nat *nat = nfct_nat(ct); |
| 320 | |
| 321 | if (!(ct->status & IPS_SEQ_ADJUST) || !nat) |
| 322 | return 0; |
| 323 | |
| 324 | natseq = &nat->seq[IP_CT_DIR_ORIGINAL]; |
| 325 | if (dump_nat_seq_adj(skb, natseq, CTA_NAT_SEQ_ADJ_ORIG) == -1) |
| 326 | return -1; |
| 327 | |
| 328 | natseq = &nat->seq[IP_CT_DIR_REPLY]; |
| 329 | if (dump_nat_seq_adj(skb, natseq, CTA_NAT_SEQ_ADJ_REPLY) == -1) |
| 330 | return -1; |
| 331 | |
| 332 | return 0; |
| 333 | } |
| 334 | #else |
| 335 | #define ctnetlink_dump_nat_seq_adj(a, b) (0) |
| 336 | #endif |
| 337 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 338 | static inline int |
| 339 | ctnetlink_dump_id(struct sk_buff *skb, const struct nf_conn *ct) |
| 340 | { |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 341 | NLA_PUT_BE32(skb, CTA_ID, htonl((unsigned long)ct)); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 342 | return 0; |
| 343 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 344 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 345 | return -1; |
| 346 | } |
| 347 | |
| 348 | static inline int |
| 349 | ctnetlink_dump_use(struct sk_buff *skb, const struct nf_conn *ct) |
| 350 | { |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 351 | NLA_PUT_BE32(skb, CTA_USE, htonl(atomic_read(&ct->ct_general.use))); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 352 | return 0; |
| 353 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 354 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 355 | return -1; |
| 356 | } |
| 357 | |
| 358 | #define tuple(ct, dir) (&(ct)->tuplehash[dir].tuple) |
| 359 | |
| 360 | static int |
| 361 | ctnetlink_fill_info(struct sk_buff *skb, u32 pid, u32 seq, |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 362 | int event, int nowait, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 363 | const struct nf_conn *ct) |
| 364 | { |
| 365 | struct nlmsghdr *nlh; |
| 366 | struct nfgenmsg *nfmsg; |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 367 | struct nlattr *nest_parms; |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 368 | unsigned char *b = skb_tail_pointer(skb); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 369 | |
| 370 | event |= NFNL_SUBSYS_CTNETLINK << 8; |
| 371 | nlh = NLMSG_PUT(skb, pid, seq, event, sizeof(struct nfgenmsg)); |
| 372 | nfmsg = NLMSG_DATA(nlh); |
| 373 | |
| 374 | nlh->nlmsg_flags = (nowait && pid) ? NLM_F_MULTI : 0; |
Patrick McHardy | 5e8fbe2 | 2008-04-14 11:15:52 +0200 | [diff] [blame] | 375 | nfmsg->nfgen_family = nf_ct_l3num(ct); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 376 | nfmsg->version = NFNETLINK_V0; |
| 377 | nfmsg->res_id = 0; |
| 378 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 379 | nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED); |
| 380 | if (!nest_parms) |
| 381 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 382 | if (ctnetlink_dump_tuples(skb, tuple(ct, IP_CT_DIR_ORIGINAL)) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 383 | goto nla_put_failure; |
| 384 | nla_nest_end(skb, nest_parms); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 385 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 386 | nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED); |
| 387 | if (!nest_parms) |
| 388 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 389 | if (ctnetlink_dump_tuples(skb, tuple(ct, IP_CT_DIR_REPLY)) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 390 | goto nla_put_failure; |
| 391 | nla_nest_end(skb, nest_parms); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 392 | |
| 393 | if (ctnetlink_dump_status(skb, ct) < 0 || |
| 394 | ctnetlink_dump_timeout(skb, ct) < 0 || |
| 395 | ctnetlink_dump_counters(skb, ct, IP_CT_DIR_ORIGINAL) < 0 || |
| 396 | ctnetlink_dump_counters(skb, ct, IP_CT_DIR_REPLY) < 0 || |
| 397 | ctnetlink_dump_protoinfo(skb, ct) < 0 || |
| 398 | ctnetlink_dump_helpinfo(skb, ct) < 0 || |
| 399 | ctnetlink_dump_mark(skb, ct) < 0 || |
Pablo Neira Ayuso | 37fccd8 | 2007-12-17 22:28:41 -0800 | [diff] [blame] | 400 | ctnetlink_dump_secmark(skb, ct) < 0 || |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 401 | ctnetlink_dump_id(skb, ct) < 0 || |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 402 | ctnetlink_dump_use(skb, ct) < 0 || |
Pablo Neira Ayuso | 0f417ce | 2007-12-17 22:28:19 -0800 | [diff] [blame] | 403 | ctnetlink_dump_master(skb, ct) < 0 || |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 404 | ctnetlink_dump_nat_seq_adj(skb, ct) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 405 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 406 | |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 407 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 408 | return skb->len; |
| 409 | |
| 410 | nlmsg_failure: |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 411 | nla_put_failure: |
Arnaldo Carvalho de Melo | dc5fc57 | 2007-03-25 23:06:12 -0700 | [diff] [blame] | 412 | nlmsg_trim(skb, b); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 413 | return -1; |
| 414 | } |
| 415 | |
| 416 | #ifdef CONFIG_NF_CONNTRACK_EVENTS |
| 417 | static int ctnetlink_conntrack_event(struct notifier_block *this, |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 418 | unsigned long events, void *ptr) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 419 | { |
| 420 | struct nlmsghdr *nlh; |
| 421 | struct nfgenmsg *nfmsg; |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 422 | struct nlattr *nest_parms; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 423 | struct nf_conn *ct = (struct nf_conn *)ptr; |
| 424 | struct sk_buff *skb; |
| 425 | unsigned int type; |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 426 | sk_buff_data_t b; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 427 | unsigned int flags = 0, group; |
| 428 | |
| 429 | /* ignore our fake conntrack entry */ |
| 430 | if (ct == &nf_conntrack_untracked) |
| 431 | return NOTIFY_DONE; |
| 432 | |
| 433 | if (events & IPCT_DESTROY) { |
| 434 | type = IPCTNL_MSG_CT_DELETE; |
| 435 | group = NFNLGRP_CONNTRACK_DESTROY; |
| 436 | } else if (events & (IPCT_NEW | IPCT_RELATED)) { |
| 437 | type = IPCTNL_MSG_CT_NEW; |
| 438 | flags = NLM_F_CREATE|NLM_F_EXCL; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 439 | group = NFNLGRP_CONNTRACK_NEW; |
Pablo Neira Ayuso | 1a31526 | 2006-08-22 00:32:23 -0700 | [diff] [blame] | 440 | } else if (events & (IPCT_STATUS | IPCT_PROTOINFO)) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 441 | type = IPCTNL_MSG_CT_NEW; |
| 442 | group = NFNLGRP_CONNTRACK_UPDATE; |
| 443 | } else |
| 444 | return NOTIFY_DONE; |
Patrick McHardy | a242769 | 2006-03-20 18:03:59 -0800 | [diff] [blame] | 445 | |
| 446 | if (!nfnetlink_has_listeners(group)) |
| 447 | return NOTIFY_DONE; |
| 448 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 449 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC); |
| 450 | if (!skb) |
| 451 | return NOTIFY_DONE; |
| 452 | |
| 453 | b = skb->tail; |
| 454 | |
| 455 | type |= NFNL_SUBSYS_CTNETLINK << 8; |
| 456 | nlh = NLMSG_PUT(skb, 0, 0, type, sizeof(struct nfgenmsg)); |
| 457 | nfmsg = NLMSG_DATA(nlh); |
| 458 | |
| 459 | nlh->nlmsg_flags = flags; |
Patrick McHardy | 5e8fbe2 | 2008-04-14 11:15:52 +0200 | [diff] [blame] | 460 | nfmsg->nfgen_family = nf_ct_l3num(ct); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 461 | nfmsg->version = NFNETLINK_V0; |
| 462 | nfmsg->res_id = 0; |
| 463 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 464 | nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED); |
| 465 | if (!nest_parms) |
| 466 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 467 | if (ctnetlink_dump_tuples(skb, tuple(ct, IP_CT_DIR_ORIGINAL)) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 468 | goto nla_put_failure; |
| 469 | nla_nest_end(skb, nest_parms); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 470 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 471 | nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED); |
| 472 | if (!nest_parms) |
| 473 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 474 | if (ctnetlink_dump_tuples(skb, tuple(ct, IP_CT_DIR_REPLY)) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 475 | goto nla_put_failure; |
| 476 | nla_nest_end(skb, nest_parms); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 477 | |
Eric Leblond | 1eedf69 | 2008-05-13 23:27:11 -0700 | [diff] [blame] | 478 | if (ctnetlink_dump_id(skb, ct) < 0) |
| 479 | goto nla_put_failure; |
| 480 | |
Fabian Hugelshofer | e57dce6 | 2008-06-09 15:59:58 -0700 | [diff] [blame] | 481 | if (ctnetlink_dump_status(skb, ct) < 0) |
| 482 | goto nla_put_failure; |
| 483 | |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 484 | if (events & IPCT_DESTROY) { |
| 485 | if (ctnetlink_dump_counters(skb, ct, IP_CT_DIR_ORIGINAL) < 0 || |
| 486 | ctnetlink_dump_counters(skb, ct, IP_CT_DIR_REPLY) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 487 | goto nla_put_failure; |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 488 | } else { |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 489 | if (ctnetlink_dump_timeout(skb, ct) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 490 | goto nla_put_failure; |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 491 | |
| 492 | if (events & IPCT_PROTOINFO |
| 493 | && ctnetlink_dump_protoinfo(skb, ct) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 494 | goto nla_put_failure; |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 495 | |
| 496 | if ((events & IPCT_HELPER || nfct_help(ct)) |
| 497 | && ctnetlink_dump_helpinfo(skb, ct) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 498 | goto nla_put_failure; |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 499 | |
Pablo Neira Ayuso | 37fccd8 | 2007-12-17 22:28:41 -0800 | [diff] [blame] | 500 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
| 501 | if ((events & IPCT_SECMARK || ct->secmark) |
| 502 | && ctnetlink_dump_secmark(skb, ct) < 0) |
| 503 | goto nla_put_failure; |
| 504 | #endif |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 505 | |
Pablo Neira Ayuso | 0f417ce | 2007-12-17 22:28:19 -0800 | [diff] [blame] | 506 | if (events & IPCT_RELATED && |
| 507 | ctnetlink_dump_master(skb, ct) < 0) |
| 508 | goto nla_put_failure; |
| 509 | |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 510 | if (events & IPCT_NATSEQADJ && |
| 511 | ctnetlink_dump_nat_seq_adj(skb, ct) < 0) |
| 512 | goto nla_put_failure; |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 513 | } |
Pablo Neira Ayuso | b9a37e0 | 2006-08-22 00:31:49 -0700 | [diff] [blame] | 514 | |
Eric Leblond | a83099a | 2008-01-31 04:44:27 -0800 | [diff] [blame] | 515 | #ifdef CONFIG_NF_CONNTRACK_MARK |
| 516 | if ((events & IPCT_MARK || ct->mark) |
| 517 | && ctnetlink_dump_mark(skb, ct) < 0) |
| 518 | goto nla_put_failure; |
| 519 | #endif |
| 520 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 521 | nlh->nlmsg_len = skb->tail - b; |
| 522 | nfnetlink_send(skb, 0, group, 0); |
| 523 | return NOTIFY_DONE; |
| 524 | |
| 525 | nlmsg_failure: |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 526 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 527 | kfree_skb(skb); |
| 528 | return NOTIFY_DONE; |
| 529 | } |
| 530 | #endif /* CONFIG_NF_CONNTRACK_EVENTS */ |
| 531 | |
| 532 | static int ctnetlink_done(struct netlink_callback *cb) |
| 533 | { |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 534 | if (cb->args[1]) |
| 535 | nf_ct_put((struct nf_conn *)cb->args[1]); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 536 | return 0; |
| 537 | } |
| 538 | |
| 539 | static int |
| 540 | ctnetlink_dump_table(struct sk_buff *skb, struct netlink_callback *cb) |
| 541 | { |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 542 | struct nf_conn *ct, *last; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 543 | struct nf_conntrack_tuple_hash *h; |
Patrick McHardy | f205c5e | 2007-07-07 22:28:14 -0700 | [diff] [blame] | 544 | struct hlist_node *n; |
Pablo Neira Ayuso | 87711cb | 2006-01-05 12:19:23 -0800 | [diff] [blame] | 545 | struct nfgenmsg *nfmsg = NLMSG_DATA(cb->nlh); |
| 546 | u_int8_t l3proto = nfmsg->nfgen_family; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 547 | |
Patrick McHardy | 76507f6 | 2008-01-31 04:38:38 -0800 | [diff] [blame] | 548 | rcu_read_lock(); |
Patrick McHardy | d205dc4 | 2006-08-17 18:12:38 -0700 | [diff] [blame] | 549 | last = (struct nf_conn *)cb->args[1]; |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 550 | for (; cb->args[0] < nf_conntrack_htable_size; cb->args[0]++) { |
| 551 | restart: |
Alexey Dobriyan | 400dad3 | 2008-10-08 11:35:03 +0200 | [diff] [blame^] | 552 | hlist_for_each_entry_rcu(h, n, &init_net.ct.hash[cb->args[0]], |
Patrick McHardy | 76507f6 | 2008-01-31 04:38:38 -0800 | [diff] [blame] | 553 | hnode) { |
Jozsef Kadlecsik | 5b1158e | 2006-12-02 22:07:13 -0800 | [diff] [blame] | 554 | if (NF_CT_DIRECTION(h) != IP_CT_DIR_ORIGINAL) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 555 | continue; |
| 556 | ct = nf_ct_tuplehash_to_ctrack(h); |
Pablo Neira Ayuso | 87711cb | 2006-01-05 12:19:23 -0800 | [diff] [blame] | 557 | /* Dump entries of a given L3 protocol number. |
| 558 | * If it is not specified, ie. l3proto == 0, |
| 559 | * then dump everything. */ |
Patrick McHardy | 5e8fbe2 | 2008-04-14 11:15:52 +0200 | [diff] [blame] | 560 | if (l3proto && nf_ct_l3num(ct) != l3proto) |
Pablo Neira Ayuso | 87711cb | 2006-01-05 12:19:23 -0800 | [diff] [blame] | 561 | continue; |
Patrick McHardy | d205dc4 | 2006-08-17 18:12:38 -0700 | [diff] [blame] | 562 | if (cb->args[1]) { |
| 563 | if (ct != last) |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 564 | continue; |
Patrick McHardy | d205dc4 | 2006-08-17 18:12:38 -0700 | [diff] [blame] | 565 | cb->args[1] = 0; |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 566 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 567 | if (ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).pid, |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 568 | cb->nlh->nlmsg_seq, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 569 | IPCTNL_MSG_CT_NEW, |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 570 | 1, ct) < 0) { |
Patrick McHardy | 76507f6 | 2008-01-31 04:38:38 -0800 | [diff] [blame] | 571 | if (!atomic_inc_not_zero(&ct->ct_general.use)) |
| 572 | continue; |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 573 | cb->args[1] = (unsigned long)ct; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 574 | goto out; |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 575 | } |
Krzysztof Piotr Oledzki | 5840157 | 2008-07-21 10:01:34 -0700 | [diff] [blame] | 576 | |
Pablo Neira Ayuso | 01f3484 | 2006-09-20 12:00:45 -0700 | [diff] [blame] | 577 | if (NFNL_MSG_TYPE(cb->nlh->nlmsg_type) == |
Krzysztof Piotr Oledzki | 5840157 | 2008-07-21 10:01:34 -0700 | [diff] [blame] | 578 | IPCTNL_MSG_CT_GET_CTRZERO) { |
| 579 | struct nf_conn_counter *acct; |
| 580 | |
| 581 | acct = nf_conn_acct_find(ct); |
| 582 | if (acct) |
| 583 | memset(acct, 0, sizeof(struct nf_conn_counter[IP_CT_DIR_MAX])); |
| 584 | } |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 585 | } |
Patrick McHardy | d205dc4 | 2006-08-17 18:12:38 -0700 | [diff] [blame] | 586 | if (cb->args[1]) { |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 587 | cb->args[1] = 0; |
| 588 | goto restart; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 589 | } |
| 590 | } |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 591 | out: |
Patrick McHardy | 76507f6 | 2008-01-31 04:38:38 -0800 | [diff] [blame] | 592 | rcu_read_unlock(); |
Patrick McHardy | d205dc4 | 2006-08-17 18:12:38 -0700 | [diff] [blame] | 593 | if (last) |
| 594 | nf_ct_put(last); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 595 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 596 | return skb->len; |
| 597 | } |
| 598 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 599 | static inline int |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 600 | ctnetlink_parse_tuple_ip(struct nlattr *attr, struct nf_conntrack_tuple *tuple) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 601 | { |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 602 | struct nlattr *tb[CTA_IP_MAX+1]; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 603 | struct nf_conntrack_l3proto *l3proto; |
| 604 | int ret = 0; |
| 605 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 606 | nla_parse_nested(tb, CTA_IP_MAX, attr, NULL); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 607 | |
| 608 | l3proto = nf_ct_l3proto_find_get(tuple->src.l3num); |
| 609 | |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 610 | if (likely(l3proto->nlattr_to_tuple)) { |
| 611 | ret = nla_validate_nested(attr, CTA_IP_MAX, |
| 612 | l3proto->nla_policy); |
| 613 | if (ret == 0) |
| 614 | ret = l3proto->nlattr_to_tuple(tb, tuple); |
| 615 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 616 | |
| 617 | nf_ct_l3proto_put(l3proto); |
| 618 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 619 | return ret; |
| 620 | } |
| 621 | |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 622 | static const struct nla_policy proto_nla_policy[CTA_PROTO_MAX+1] = { |
| 623 | [CTA_PROTO_NUM] = { .type = NLA_U8 }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 624 | }; |
| 625 | |
| 626 | static inline int |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 627 | ctnetlink_parse_tuple_proto(struct nlattr *attr, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 628 | struct nf_conntrack_tuple *tuple) |
| 629 | { |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 630 | struct nlattr *tb[CTA_PROTO_MAX+1]; |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 631 | struct nf_conntrack_l4proto *l4proto; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 632 | int ret = 0; |
| 633 | |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 634 | ret = nla_parse_nested(tb, CTA_PROTO_MAX, attr, proto_nla_policy); |
| 635 | if (ret < 0) |
| 636 | return ret; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 637 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 638 | if (!tb[CTA_PROTO_NUM]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 639 | return -EINVAL; |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 640 | tuple->dst.protonum = nla_get_u8(tb[CTA_PROTO_NUM]); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 641 | |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 642 | l4proto = nf_ct_l4proto_find_get(tuple->src.l3num, tuple->dst.protonum); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 643 | |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 644 | if (likely(l4proto->nlattr_to_tuple)) { |
| 645 | ret = nla_validate_nested(attr, CTA_PROTO_MAX, |
| 646 | l4proto->nla_policy); |
| 647 | if (ret == 0) |
| 648 | ret = l4proto->nlattr_to_tuple(tb, tuple); |
| 649 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 650 | |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 651 | nf_ct_l4proto_put(l4proto); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 652 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 653 | return ret; |
| 654 | } |
| 655 | |
Ilpo Järvinen | bb5cf80 | 2008-01-05 23:11:31 -0800 | [diff] [blame] | 656 | static int |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 657 | ctnetlink_parse_tuple(struct nlattr *cda[], struct nf_conntrack_tuple *tuple, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 658 | enum ctattr_tuple type, u_int8_t l3num) |
| 659 | { |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 660 | struct nlattr *tb[CTA_TUPLE_MAX+1]; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 661 | int err; |
| 662 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 663 | memset(tuple, 0, sizeof(*tuple)); |
| 664 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 665 | nla_parse_nested(tb, CTA_TUPLE_MAX, cda[type], NULL); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 666 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 667 | if (!tb[CTA_TUPLE_IP]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 668 | return -EINVAL; |
| 669 | |
| 670 | tuple->src.l3num = l3num; |
| 671 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 672 | err = ctnetlink_parse_tuple_ip(tb[CTA_TUPLE_IP], tuple); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 673 | if (err < 0) |
| 674 | return err; |
| 675 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 676 | if (!tb[CTA_TUPLE_PROTO]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 677 | return -EINVAL; |
| 678 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 679 | err = ctnetlink_parse_tuple_proto(tb[CTA_TUPLE_PROTO], tuple); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 680 | if (err < 0) |
| 681 | return err; |
| 682 | |
| 683 | /* orig and expect tuples get DIR_ORIGINAL */ |
| 684 | if (type == CTA_TUPLE_REPLY) |
| 685 | tuple->dst.dir = IP_CT_DIR_REPLY; |
| 686 | else |
| 687 | tuple->dst.dir = IP_CT_DIR_ORIGINAL; |
| 688 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 689 | return 0; |
| 690 | } |
| 691 | |
Jozsef Kadlecsik | 5b1158e | 2006-12-02 22:07:13 -0800 | [diff] [blame] | 692 | #ifdef CONFIG_NF_NAT_NEEDED |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 693 | static const struct nla_policy protonat_nla_policy[CTA_PROTONAT_MAX+1] = { |
| 694 | [CTA_PROTONAT_PORT_MIN] = { .type = NLA_U16 }, |
| 695 | [CTA_PROTONAT_PORT_MAX] = { .type = NLA_U16 }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 696 | }; |
| 697 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 698 | static int nfnetlink_parse_nat_proto(struct nlattr *attr, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 699 | const struct nf_conn *ct, |
Jozsef Kadlecsik | 5b1158e | 2006-12-02 22:07:13 -0800 | [diff] [blame] | 700 | struct nf_nat_range *range) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 701 | { |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 702 | struct nlattr *tb[CTA_PROTONAT_MAX+1]; |
Patrick McHardy | 2b628a0 | 2007-12-17 22:37:36 -0800 | [diff] [blame] | 703 | const struct nf_nat_protocol *npt; |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 704 | int err; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 705 | |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 706 | err = nla_parse_nested(tb, CTA_PROTONAT_MAX, attr, protonat_nla_policy); |
| 707 | if (err < 0) |
| 708 | return err; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 709 | |
Patrick McHardy | 5e8fbe2 | 2008-04-14 11:15:52 +0200 | [diff] [blame] | 710 | npt = nf_nat_proto_find_get(nf_ct_protonum(ct)); |
Patrick McHardy | ca6a507 | 2008-04-14 11:15:47 +0200 | [diff] [blame] | 711 | if (npt->nlattr_to_range) |
| 712 | err = npt->nlattr_to_range(tb, range); |
Jozsef Kadlecsik | 5b1158e | 2006-12-02 22:07:13 -0800 | [diff] [blame] | 713 | nf_nat_proto_put(npt); |
Patrick McHardy | ca6a507 | 2008-04-14 11:15:47 +0200 | [diff] [blame] | 714 | return err; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 715 | } |
| 716 | |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 717 | static const struct nla_policy nat_nla_policy[CTA_NAT_MAX+1] = { |
| 718 | [CTA_NAT_MINIP] = { .type = NLA_U32 }, |
| 719 | [CTA_NAT_MAXIP] = { .type = NLA_U32 }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 720 | }; |
| 721 | |
| 722 | static inline int |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 723 | nfnetlink_parse_nat(struct nlattr *nat, |
Jozsef Kadlecsik | 5b1158e | 2006-12-02 22:07:13 -0800 | [diff] [blame] | 724 | const struct nf_conn *ct, struct nf_nat_range *range) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 725 | { |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 726 | struct nlattr *tb[CTA_NAT_MAX+1]; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 727 | int err; |
| 728 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 729 | memset(range, 0, sizeof(*range)); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 730 | |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 731 | err = nla_parse_nested(tb, CTA_NAT_MAX, nat, nat_nla_policy); |
| 732 | if (err < 0) |
| 733 | return err; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 734 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 735 | if (tb[CTA_NAT_MINIP]) |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 736 | range->min_ip = nla_get_be32(tb[CTA_NAT_MINIP]); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 737 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 738 | if (!tb[CTA_NAT_MAXIP]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 739 | range->max_ip = range->min_ip; |
| 740 | else |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 741 | range->max_ip = nla_get_be32(tb[CTA_NAT_MAXIP]); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 742 | |
| 743 | if (range->min_ip) |
| 744 | range->flags |= IP_NAT_RANGE_MAP_IPS; |
| 745 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 746 | if (!tb[CTA_NAT_PROTO]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 747 | return 0; |
| 748 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 749 | err = nfnetlink_parse_nat_proto(tb[CTA_NAT_PROTO], ct, range); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 750 | if (err < 0) |
| 751 | return err; |
| 752 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 753 | return 0; |
| 754 | } |
| 755 | #endif |
| 756 | |
| 757 | static inline int |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 758 | ctnetlink_parse_help(struct nlattr *attr, char **helper_name) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 759 | { |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 760 | struct nlattr *tb[CTA_HELP_MAX+1]; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 761 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 762 | nla_parse_nested(tb, CTA_HELP_MAX, attr, NULL); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 763 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 764 | if (!tb[CTA_HELP_NAME]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 765 | return -EINVAL; |
| 766 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 767 | *helper_name = nla_data(tb[CTA_HELP_NAME]); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 768 | |
| 769 | return 0; |
| 770 | } |
| 771 | |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 772 | static const struct nla_policy ct_nla_policy[CTA_MAX+1] = { |
| 773 | [CTA_STATUS] = { .type = NLA_U32 }, |
| 774 | [CTA_TIMEOUT] = { .type = NLA_U32 }, |
| 775 | [CTA_MARK] = { .type = NLA_U32 }, |
| 776 | [CTA_USE] = { .type = NLA_U32 }, |
| 777 | [CTA_ID] = { .type = NLA_U32 }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 778 | }; |
| 779 | |
| 780 | static int |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 781 | ctnetlink_del_conntrack(struct sock *ctnl, struct sk_buff *skb, |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 782 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 783 | { |
| 784 | struct nf_conntrack_tuple_hash *h; |
| 785 | struct nf_conntrack_tuple tuple; |
| 786 | struct nf_conn *ct; |
| 787 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); |
| 788 | u_int8_t u3 = nfmsg->nfgen_family; |
| 789 | int err = 0; |
| 790 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 791 | if (cda[CTA_TUPLE_ORIG]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 792 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, u3); |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 793 | else if (cda[CTA_TUPLE_REPLY]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 794 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, u3); |
| 795 | else { |
| 796 | /* Flush the whole table */ |
Alexey Dobriyan | 400dad3 | 2008-10-08 11:35:03 +0200 | [diff] [blame^] | 797 | nf_conntrack_flush(&init_net); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 798 | return 0; |
| 799 | } |
| 800 | |
| 801 | if (err < 0) |
| 802 | return err; |
| 803 | |
Alexey Dobriyan | 400dad3 | 2008-10-08 11:35:03 +0200 | [diff] [blame^] | 804 | h = nf_conntrack_find_get(&init_net, &tuple); |
Pablo Neira Ayuso | 9ea8cfd | 2006-10-12 14:09:16 -0700 | [diff] [blame] | 805 | if (!h) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 806 | return -ENOENT; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 807 | |
| 808 | ct = nf_ct_tuplehash_to_ctrack(h); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 809 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 810 | if (cda[CTA_ID]) { |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 811 | u_int32_t id = ntohl(nla_get_be32(cda[CTA_ID])); |
Patrick McHardy | 7f85f91 | 2007-09-28 14:41:27 -0700 | [diff] [blame] | 812 | if (id != (u32)(unsigned long)ct) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 813 | nf_ct_put(ct); |
| 814 | return -ENOENT; |
| 815 | } |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 816 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 817 | |
Patrick McHardy | 5109176 | 2008-06-09 15:59:06 -0700 | [diff] [blame] | 818 | nf_ct_kill(ct); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 819 | nf_ct_put(ct); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 820 | |
| 821 | return 0; |
| 822 | } |
| 823 | |
| 824 | static int |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 825 | ctnetlink_get_conntrack(struct sock *ctnl, struct sk_buff *skb, |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 826 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 827 | { |
| 828 | struct nf_conntrack_tuple_hash *h; |
| 829 | struct nf_conntrack_tuple tuple; |
| 830 | struct nf_conn *ct; |
| 831 | struct sk_buff *skb2 = NULL; |
| 832 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); |
| 833 | u_int8_t u3 = nfmsg->nfgen_family; |
| 834 | int err = 0; |
| 835 | |
Krzysztof Piotr Oledzki | 5840157 | 2008-07-21 10:01:34 -0700 | [diff] [blame] | 836 | if (nlh->nlmsg_flags & NLM_F_DUMP) |
Thomas Graf | c702e80 | 2007-03-22 23:30:55 -0700 | [diff] [blame] | 837 | return netlink_dump_start(ctnl, skb, nlh, ctnetlink_dump_table, |
| 838 | ctnetlink_done); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 839 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 840 | if (cda[CTA_TUPLE_ORIG]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 841 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, u3); |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 842 | else if (cda[CTA_TUPLE_REPLY]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 843 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, u3); |
| 844 | else |
| 845 | return -EINVAL; |
| 846 | |
| 847 | if (err < 0) |
| 848 | return err; |
| 849 | |
Alexey Dobriyan | 400dad3 | 2008-10-08 11:35:03 +0200 | [diff] [blame^] | 850 | h = nf_conntrack_find_get(&init_net, &tuple); |
Pablo Neira Ayuso | 9ea8cfd | 2006-10-12 14:09:16 -0700 | [diff] [blame] | 851 | if (!h) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 852 | return -ENOENT; |
Pablo Neira Ayuso | 9ea8cfd | 2006-10-12 14:09:16 -0700 | [diff] [blame] | 853 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 854 | ct = nf_ct_tuplehash_to_ctrack(h); |
| 855 | |
| 856 | err = -ENOMEM; |
| 857 | skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); |
| 858 | if (!skb2) { |
| 859 | nf_ct_put(ct); |
| 860 | return -ENOMEM; |
| 861 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 862 | |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 863 | err = ctnetlink_fill_info(skb2, NETLINK_CB(skb).pid, nlh->nlmsg_seq, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 864 | IPCTNL_MSG_CT_NEW, 1, ct); |
| 865 | nf_ct_put(ct); |
| 866 | if (err <= 0) |
| 867 | goto free; |
| 868 | |
| 869 | err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).pid, MSG_DONTWAIT); |
| 870 | if (err < 0) |
| 871 | goto out; |
| 872 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 873 | return 0; |
| 874 | |
| 875 | free: |
| 876 | kfree_skb(skb2); |
| 877 | out: |
| 878 | return err; |
| 879 | } |
| 880 | |
Ilpo Järvinen | bb5cf80 | 2008-01-05 23:11:31 -0800 | [diff] [blame] | 881 | static int |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 882 | ctnetlink_change_status(struct nf_conn *ct, struct nlattr *cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 883 | { |
| 884 | unsigned long d; |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 885 | unsigned int status = ntohl(nla_get_be32(cda[CTA_STATUS])); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 886 | d = ct->status ^ status; |
| 887 | |
| 888 | if (d & (IPS_EXPECTED|IPS_CONFIRMED|IPS_DYING)) |
| 889 | /* unchangeable */ |
Pablo Neira Ayuso | 0adf9d6 | 2008-06-09 15:56:20 -0700 | [diff] [blame] | 890 | return -EBUSY; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 891 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 892 | if (d & IPS_SEEN_REPLY && !(status & IPS_SEEN_REPLY)) |
| 893 | /* SEEN_REPLY bit can only be set */ |
Pablo Neira Ayuso | 0adf9d6 | 2008-06-09 15:56:20 -0700 | [diff] [blame] | 894 | return -EBUSY; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 895 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 896 | if (d & IPS_ASSURED && !(status & IPS_ASSURED)) |
| 897 | /* ASSURED bit can only be set */ |
Pablo Neira Ayuso | 0adf9d6 | 2008-06-09 15:56:20 -0700 | [diff] [blame] | 898 | return -EBUSY; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 899 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 900 | if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST]) { |
Jozsef Kadlecsik | 5b1158e | 2006-12-02 22:07:13 -0800 | [diff] [blame] | 901 | #ifndef CONFIG_NF_NAT_NEEDED |
Pablo Neira Ayuso | 0adf9d6 | 2008-06-09 15:56:20 -0700 | [diff] [blame] | 902 | return -EOPNOTSUPP; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 903 | #else |
Jozsef Kadlecsik | 5b1158e | 2006-12-02 22:07:13 -0800 | [diff] [blame] | 904 | struct nf_nat_range range; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 905 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 906 | if (cda[CTA_NAT_DST]) { |
| 907 | if (nfnetlink_parse_nat(cda[CTA_NAT_DST], ct, |
Patrick McHardy | 3726add | 2006-05-29 18:24:39 -0700 | [diff] [blame] | 908 | &range) < 0) |
| 909 | return -EINVAL; |
Patrick McHardy | cc01dcb | 2007-12-17 22:38:20 -0800 | [diff] [blame] | 910 | if (nf_nat_initialized(ct, IP_NAT_MANIP_DST)) |
Patrick McHardy | 3726add | 2006-05-29 18:24:39 -0700 | [diff] [blame] | 911 | return -EEXIST; |
Patrick McHardy | cc01dcb | 2007-12-17 22:38:20 -0800 | [diff] [blame] | 912 | nf_nat_setup_info(ct, &range, IP_NAT_MANIP_DST); |
Patrick McHardy | 3726add | 2006-05-29 18:24:39 -0700 | [diff] [blame] | 913 | } |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 914 | if (cda[CTA_NAT_SRC]) { |
| 915 | if (nfnetlink_parse_nat(cda[CTA_NAT_SRC], ct, |
Patrick McHardy | 3726add | 2006-05-29 18:24:39 -0700 | [diff] [blame] | 916 | &range) < 0) |
| 917 | return -EINVAL; |
Patrick McHardy | cc01dcb | 2007-12-17 22:38:20 -0800 | [diff] [blame] | 918 | if (nf_nat_initialized(ct, IP_NAT_MANIP_SRC)) |
Patrick McHardy | 3726add | 2006-05-29 18:24:39 -0700 | [diff] [blame] | 919 | return -EEXIST; |
Patrick McHardy | cc01dcb | 2007-12-17 22:38:20 -0800 | [diff] [blame] | 920 | nf_nat_setup_info(ct, &range, IP_NAT_MANIP_SRC); |
Patrick McHardy | 3726add | 2006-05-29 18:24:39 -0700 | [diff] [blame] | 921 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 922 | #endif |
| 923 | } |
| 924 | |
| 925 | /* Be careful here, modifying NAT bits can screw up things, |
| 926 | * so don't let users modify them directly if they don't pass |
Jozsef Kadlecsik | 5b1158e | 2006-12-02 22:07:13 -0800 | [diff] [blame] | 927 | * nf_nat_range. */ |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 928 | ct->status |= status & ~(IPS_NAT_DONE_MASK | IPS_NAT_MASK); |
| 929 | return 0; |
| 930 | } |
| 931 | |
| 932 | |
| 933 | static inline int |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 934 | ctnetlink_change_helper(struct nf_conn *ct, struct nlattr *cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 935 | { |
| 936 | struct nf_conntrack_helper *helper; |
Harald Welte | dc808fe | 2006-03-20 17:56:32 -0800 | [diff] [blame] | 937 | struct nf_conn_help *help = nfct_help(ct); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 938 | char *helpname; |
| 939 | int err; |
| 940 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 941 | /* don't change helper of sibling connections */ |
| 942 | if (ct->master) |
Pablo Neira Ayuso | 0adf9d6 | 2008-06-09 15:56:20 -0700 | [diff] [blame] | 943 | return -EBUSY; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 944 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 945 | err = ctnetlink_parse_help(cda[CTA_HELP], &helpname); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 946 | if (err < 0) |
| 947 | return err; |
| 948 | |
Yasuyuki Kozakai | df293bb | 2007-05-10 14:15:58 -0700 | [diff] [blame] | 949 | if (!strcmp(helpname, "")) { |
| 950 | if (help && help->helper) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 951 | /* we had a helper before ... */ |
| 952 | nf_ct_remove_expectations(ct); |
Patrick McHarrdy | 3c158f7 | 2007-06-05 12:55:27 -0700 | [diff] [blame] | 953 | rcu_assign_pointer(help->helper, NULL); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 954 | } |
Yasuyuki Kozakai | df293bb | 2007-05-10 14:15:58 -0700 | [diff] [blame] | 955 | |
| 956 | return 0; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 957 | } |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 958 | |
Yasuyuki Kozakai | df293bb | 2007-05-10 14:15:58 -0700 | [diff] [blame] | 959 | helper = __nf_conntrack_helper_find_byname(helpname); |
| 960 | if (helper == NULL) |
Pablo Neira Ayuso | 0adf9d6 | 2008-06-09 15:56:20 -0700 | [diff] [blame] | 961 | return -EOPNOTSUPP; |
Yasuyuki Kozakai | df293bb | 2007-05-10 14:15:58 -0700 | [diff] [blame] | 962 | |
Yasuyuki Kozakai | ceceae1 | 2007-07-07 22:23:42 -0700 | [diff] [blame] | 963 | if (help) { |
| 964 | if (help->helper == helper) |
| 965 | return 0; |
| 966 | if (help->helper) |
| 967 | return -EBUSY; |
| 968 | /* need to zero data of old helper */ |
| 969 | memset(&help->help, 0, sizeof(help->help)); |
| 970 | } else { |
Pablo Neira Ayuso | fab00c5 | 2008-08-18 21:31:46 -0700 | [diff] [blame] | 971 | help = nf_ct_helper_ext_add(ct, GFP_ATOMIC); |
Yasuyuki Kozakai | ceceae1 | 2007-07-07 22:23:42 -0700 | [diff] [blame] | 972 | if (help == NULL) |
| 973 | return -ENOMEM; |
| 974 | } |
Yasuyuki Kozakai | df293bb | 2007-05-10 14:15:58 -0700 | [diff] [blame] | 975 | |
Patrick McHarrdy | 3c158f7 | 2007-06-05 12:55:27 -0700 | [diff] [blame] | 976 | rcu_assign_pointer(help->helper, helper); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 977 | |
| 978 | return 0; |
| 979 | } |
| 980 | |
| 981 | static inline int |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 982 | ctnetlink_change_timeout(struct nf_conn *ct, struct nlattr *cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 983 | { |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 984 | u_int32_t timeout = ntohl(nla_get_be32(cda[CTA_TIMEOUT])); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 985 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 986 | if (!del_timer(&ct->timeout)) |
| 987 | return -ETIME; |
| 988 | |
| 989 | ct->timeout.expires = jiffies + timeout * HZ; |
| 990 | add_timer(&ct->timeout); |
| 991 | |
| 992 | return 0; |
| 993 | } |
| 994 | |
| 995 | static inline int |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 996 | ctnetlink_change_protoinfo(struct nf_conn *ct, struct nlattr *cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 997 | { |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 998 | struct nlattr *tb[CTA_PROTOINFO_MAX+1], *attr = cda[CTA_PROTOINFO]; |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 999 | struct nf_conntrack_l4proto *l4proto; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1000 | int err = 0; |
| 1001 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1002 | nla_parse_nested(tb, CTA_PROTOINFO_MAX, attr, NULL); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1003 | |
Patrick McHardy | 5e8fbe2 | 2008-04-14 11:15:52 +0200 | [diff] [blame] | 1004 | l4proto = nf_ct_l4proto_find_get(nf_ct_l3num(ct), nf_ct_protonum(ct)); |
Patrick McHardy | fdf7083 | 2007-09-28 14:37:41 -0700 | [diff] [blame] | 1005 | if (l4proto->from_nlattr) |
| 1006 | err = l4proto->from_nlattr(tb, ct); |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 1007 | nf_ct_l4proto_put(l4proto); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1008 | |
| 1009 | return err; |
| 1010 | } |
| 1011 | |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1012 | #ifdef CONFIG_NF_NAT_NEEDED |
| 1013 | static inline int |
| 1014 | change_nat_seq_adj(struct nf_nat_seq *natseq, struct nlattr *attr) |
| 1015 | { |
| 1016 | struct nlattr *cda[CTA_NAT_SEQ_MAX+1]; |
| 1017 | |
| 1018 | nla_parse_nested(cda, CTA_NAT_SEQ_MAX, attr, NULL); |
| 1019 | |
| 1020 | if (!cda[CTA_NAT_SEQ_CORRECTION_POS]) |
| 1021 | return -EINVAL; |
| 1022 | |
| 1023 | natseq->correction_pos = |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 1024 | ntohl(nla_get_be32(cda[CTA_NAT_SEQ_CORRECTION_POS])); |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1025 | |
| 1026 | if (!cda[CTA_NAT_SEQ_OFFSET_BEFORE]) |
| 1027 | return -EINVAL; |
| 1028 | |
| 1029 | natseq->offset_before = |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 1030 | ntohl(nla_get_be32(cda[CTA_NAT_SEQ_OFFSET_BEFORE])); |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1031 | |
| 1032 | if (!cda[CTA_NAT_SEQ_OFFSET_AFTER]) |
| 1033 | return -EINVAL; |
| 1034 | |
| 1035 | natseq->offset_after = |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 1036 | ntohl(nla_get_be32(cda[CTA_NAT_SEQ_OFFSET_AFTER])); |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1037 | |
| 1038 | return 0; |
| 1039 | } |
| 1040 | |
| 1041 | static int |
| 1042 | ctnetlink_change_nat_seq_adj(struct nf_conn *ct, struct nlattr *cda[]) |
| 1043 | { |
| 1044 | int ret = 0; |
| 1045 | struct nf_conn_nat *nat = nfct_nat(ct); |
| 1046 | |
| 1047 | if (!nat) |
| 1048 | return 0; |
| 1049 | |
| 1050 | if (cda[CTA_NAT_SEQ_ADJ_ORIG]) { |
| 1051 | ret = change_nat_seq_adj(&nat->seq[IP_CT_DIR_ORIGINAL], |
| 1052 | cda[CTA_NAT_SEQ_ADJ_ORIG]); |
| 1053 | if (ret < 0) |
| 1054 | return ret; |
| 1055 | |
| 1056 | ct->status |= IPS_SEQ_ADJUST; |
| 1057 | } |
| 1058 | |
| 1059 | if (cda[CTA_NAT_SEQ_ADJ_REPLY]) { |
| 1060 | ret = change_nat_seq_adj(&nat->seq[IP_CT_DIR_REPLY], |
| 1061 | cda[CTA_NAT_SEQ_ADJ_REPLY]); |
| 1062 | if (ret < 0) |
| 1063 | return ret; |
| 1064 | |
| 1065 | ct->status |= IPS_SEQ_ADJUST; |
| 1066 | } |
| 1067 | |
| 1068 | return 0; |
| 1069 | } |
| 1070 | #endif |
| 1071 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1072 | static int |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1073 | ctnetlink_change_conntrack(struct nf_conn *ct, struct nlattr *cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1074 | { |
| 1075 | int err; |
| 1076 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1077 | if (cda[CTA_HELP]) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1078 | err = ctnetlink_change_helper(ct, cda); |
| 1079 | if (err < 0) |
| 1080 | return err; |
| 1081 | } |
| 1082 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1083 | if (cda[CTA_TIMEOUT]) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1084 | err = ctnetlink_change_timeout(ct, cda); |
| 1085 | if (err < 0) |
| 1086 | return err; |
| 1087 | } |
| 1088 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1089 | if (cda[CTA_STATUS]) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1090 | err = ctnetlink_change_status(ct, cda); |
| 1091 | if (err < 0) |
| 1092 | return err; |
| 1093 | } |
| 1094 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1095 | if (cda[CTA_PROTOINFO]) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1096 | err = ctnetlink_change_protoinfo(ct, cda); |
| 1097 | if (err < 0) |
| 1098 | return err; |
| 1099 | } |
| 1100 | |
Martin Josefsson | bcd1e83 | 2006-04-01 02:23:21 -0800 | [diff] [blame] | 1101 | #if defined(CONFIG_NF_CONNTRACK_MARK) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1102 | if (cda[CTA_MARK]) |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 1103 | ct->mark = ntohl(nla_get_be32(cda[CTA_MARK])); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1104 | #endif |
| 1105 | |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1106 | #ifdef CONFIG_NF_NAT_NEEDED |
| 1107 | if (cda[CTA_NAT_SEQ_ADJ_ORIG] || cda[CTA_NAT_SEQ_ADJ_REPLY]) { |
| 1108 | err = ctnetlink_change_nat_seq_adj(ct, cda); |
| 1109 | if (err < 0) |
| 1110 | return err; |
| 1111 | } |
| 1112 | #endif |
| 1113 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1114 | return 0; |
| 1115 | } |
| 1116 | |
| 1117 | static int |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1118 | ctnetlink_create_conntrack(struct nlattr *cda[], |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1119 | struct nf_conntrack_tuple *otuple, |
Pablo Neira Ayuso | 5faa1f4 | 2007-09-28 14:43:53 -0700 | [diff] [blame] | 1120 | struct nf_conntrack_tuple *rtuple, |
| 1121 | struct nf_conn *master_ct) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1122 | { |
| 1123 | struct nf_conn *ct; |
| 1124 | int err = -EINVAL; |
Yasuyuki Kozakai | dafc741 | 2006-11-27 10:25:32 -0800 | [diff] [blame] | 1125 | struct nf_conn_help *help; |
Yasuyuki Kozakai | ceceae1 | 2007-07-07 22:23:42 -0700 | [diff] [blame] | 1126 | struct nf_conntrack_helper *helper; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1127 | |
Alexey Dobriyan | 5a1fb39 | 2008-10-08 11:35:02 +0200 | [diff] [blame] | 1128 | ct = nf_conntrack_alloc(&init_net, otuple, rtuple, GFP_KERNEL); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1129 | if (ct == NULL || IS_ERR(ct)) |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1130 | return -ENOMEM; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1131 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1132 | if (!cda[CTA_TIMEOUT]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1133 | goto err; |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 1134 | ct->timeout.expires = ntohl(nla_get_be32(cda[CTA_TIMEOUT])); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1135 | |
| 1136 | ct->timeout.expires = jiffies + ct->timeout.expires * HZ; |
| 1137 | ct->status |= IPS_CONFIRMED; |
| 1138 | |
Patrick McHardy | 58a3c9b | 2008-01-31 04:36:54 -0800 | [diff] [blame] | 1139 | rcu_read_lock(); |
| 1140 | helper = __nf_ct_helper_find(rtuple); |
Yasuyuki Kozakai | ceceae1 | 2007-07-07 22:23:42 -0700 | [diff] [blame] | 1141 | if (helper) { |
Pablo Neira Ayuso | cb1cb5c | 2008-08-18 21:31:24 -0700 | [diff] [blame] | 1142 | help = nf_ct_helper_ext_add(ct, GFP_ATOMIC); |
Yasuyuki Kozakai | ceceae1 | 2007-07-07 22:23:42 -0700 | [diff] [blame] | 1143 | if (help == NULL) { |
Patrick McHardy | 58a3c9b | 2008-01-31 04:36:54 -0800 | [diff] [blame] | 1144 | rcu_read_unlock(); |
Yasuyuki Kozakai | ceceae1 | 2007-07-07 22:23:42 -0700 | [diff] [blame] | 1145 | err = -ENOMEM; |
| 1146 | goto err; |
| 1147 | } |
Patrick McHarrdy | 3c158f7 | 2007-06-05 12:55:27 -0700 | [diff] [blame] | 1148 | /* not in hash table yet so not strictly necessary */ |
| 1149 | rcu_assign_pointer(help->helper, helper); |
| 1150 | } |
Yasuyuki Kozakai | dafc741 | 2006-11-27 10:25:32 -0800 | [diff] [blame] | 1151 | |
Pablo Neira Ayuso | 1575e7e | 2008-08-18 21:30:55 -0700 | [diff] [blame] | 1152 | if (cda[CTA_STATUS]) { |
| 1153 | err = ctnetlink_change_status(ct, cda); |
| 1154 | if (err < 0) { |
| 1155 | rcu_read_unlock(); |
| 1156 | goto err; |
| 1157 | } |
| 1158 | } |
| 1159 | |
| 1160 | if (cda[CTA_PROTOINFO]) { |
| 1161 | err = ctnetlink_change_protoinfo(ct, cda); |
| 1162 | if (err < 0) { |
| 1163 | rcu_read_unlock(); |
| 1164 | goto err; |
| 1165 | } |
| 1166 | } |
| 1167 | |
| 1168 | nf_ct_acct_ext_add(ct, GFP_KERNEL); |
| 1169 | |
| 1170 | #if defined(CONFIG_NF_CONNTRACK_MARK) |
| 1171 | if (cda[CTA_MARK]) |
| 1172 | ct->mark = ntohl(nla_get_be32(cda[CTA_MARK])); |
| 1173 | #endif |
| 1174 | |
Pablo Neira Ayuso | 5faa1f4 | 2007-09-28 14:43:53 -0700 | [diff] [blame] | 1175 | /* setup master conntrack: this is a confirmed expectation */ |
Pablo Neira Ayuso | f2a8900 | 2007-12-12 10:34:29 -0800 | [diff] [blame] | 1176 | if (master_ct) { |
| 1177 | __set_bit(IPS_EXPECTED_BIT, &ct->status); |
Pablo Neira Ayuso | 5faa1f4 | 2007-09-28 14:43:53 -0700 | [diff] [blame] | 1178 | ct->master = master_ct; |
Pablo Neira Ayuso | f2a8900 | 2007-12-12 10:34:29 -0800 | [diff] [blame] | 1179 | } |
Pablo Neira Ayuso | 5faa1f4 | 2007-09-28 14:43:53 -0700 | [diff] [blame] | 1180 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1181 | add_timer(&ct->timeout); |
| 1182 | nf_conntrack_hash_insert(ct); |
Patrick McHardy | 58a3c9b | 2008-01-31 04:36:54 -0800 | [diff] [blame] | 1183 | rcu_read_unlock(); |
Yasuyuki Kozakai | dafc741 | 2006-11-27 10:25:32 -0800 | [diff] [blame] | 1184 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1185 | return 0; |
| 1186 | |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1187 | err: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1188 | nf_conntrack_free(ct); |
| 1189 | return err; |
| 1190 | } |
| 1191 | |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1192 | static int |
| 1193 | ctnetlink_new_conntrack(struct sock *ctnl, struct sk_buff *skb, |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1194 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1195 | { |
| 1196 | struct nf_conntrack_tuple otuple, rtuple; |
| 1197 | struct nf_conntrack_tuple_hash *h = NULL; |
| 1198 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); |
| 1199 | u_int8_t u3 = nfmsg->nfgen_family; |
| 1200 | int err = 0; |
| 1201 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1202 | if (cda[CTA_TUPLE_ORIG]) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1203 | err = ctnetlink_parse_tuple(cda, &otuple, CTA_TUPLE_ORIG, u3); |
| 1204 | if (err < 0) |
| 1205 | return err; |
| 1206 | } |
| 1207 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1208 | if (cda[CTA_TUPLE_REPLY]) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1209 | err = ctnetlink_parse_tuple(cda, &rtuple, CTA_TUPLE_REPLY, u3); |
| 1210 | if (err < 0) |
| 1211 | return err; |
| 1212 | } |
| 1213 | |
Patrick McHardy | f8ba1af | 2008-01-31 04:38:58 -0800 | [diff] [blame] | 1214 | spin_lock_bh(&nf_conntrack_lock); |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1215 | if (cda[CTA_TUPLE_ORIG]) |
Alexey Dobriyan | 400dad3 | 2008-10-08 11:35:03 +0200 | [diff] [blame^] | 1216 | h = __nf_conntrack_find(&init_net, &otuple); |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1217 | else if (cda[CTA_TUPLE_REPLY]) |
Alexey Dobriyan | 400dad3 | 2008-10-08 11:35:03 +0200 | [diff] [blame^] | 1218 | h = __nf_conntrack_find(&init_net, &rtuple); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1219 | |
| 1220 | if (h == NULL) { |
Pablo Neira Ayuso | 5faa1f4 | 2007-09-28 14:43:53 -0700 | [diff] [blame] | 1221 | struct nf_conntrack_tuple master; |
| 1222 | struct nf_conntrack_tuple_hash *master_h = NULL; |
| 1223 | struct nf_conn *master_ct = NULL; |
| 1224 | |
| 1225 | if (cda[CTA_TUPLE_MASTER]) { |
| 1226 | err = ctnetlink_parse_tuple(cda, |
| 1227 | &master, |
| 1228 | CTA_TUPLE_MASTER, |
| 1229 | u3); |
| 1230 | if (err < 0) |
Patrick McHardy | 1d670fd | 2008-01-31 04:35:57 -0800 | [diff] [blame] | 1231 | goto out_unlock; |
Pablo Neira Ayuso | 5faa1f4 | 2007-09-28 14:43:53 -0700 | [diff] [blame] | 1232 | |
Alexey Dobriyan | 400dad3 | 2008-10-08 11:35:03 +0200 | [diff] [blame^] | 1233 | master_h = __nf_conntrack_find(&init_net, &master); |
Pablo Neira Ayuso | 5faa1f4 | 2007-09-28 14:43:53 -0700 | [diff] [blame] | 1234 | if (master_h == NULL) { |
| 1235 | err = -ENOENT; |
| 1236 | goto out_unlock; |
| 1237 | } |
| 1238 | master_ct = nf_ct_tuplehash_to_ctrack(master_h); |
| 1239 | atomic_inc(&master_ct->ct_general.use); |
| 1240 | } |
| 1241 | |
Patrick McHardy | f8ba1af | 2008-01-31 04:38:58 -0800 | [diff] [blame] | 1242 | spin_unlock_bh(&nf_conntrack_lock); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1243 | err = -ENOENT; |
| 1244 | if (nlh->nlmsg_flags & NLM_F_CREATE) |
Pablo Neira Ayuso | 5faa1f4 | 2007-09-28 14:43:53 -0700 | [diff] [blame] | 1245 | err = ctnetlink_create_conntrack(cda, |
| 1246 | &otuple, |
| 1247 | &rtuple, |
| 1248 | master_ct); |
| 1249 | if (err < 0 && master_ct) |
| 1250 | nf_ct_put(master_ct); |
| 1251 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1252 | return err; |
| 1253 | } |
| 1254 | /* implicit 'else' */ |
| 1255 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1256 | /* We manipulate the conntrack inside the global conntrack table lock, |
| 1257 | * so there's no need to increase the refcount */ |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1258 | err = -EEXIST; |
Pablo Neira Ayuso | ff4ca82 | 2007-08-07 18:11:26 -0700 | [diff] [blame] | 1259 | if (!(nlh->nlmsg_flags & NLM_F_EXCL)) { |
| 1260 | /* we only allow nat config for new conntracks */ |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1261 | if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST]) { |
Pablo Neira Ayuso | 0adf9d6 | 2008-06-09 15:56:20 -0700 | [diff] [blame] | 1262 | err = -EOPNOTSUPP; |
Pablo Neira Ayuso | ff4ca82 | 2007-08-07 18:11:26 -0700 | [diff] [blame] | 1263 | goto out_unlock; |
| 1264 | } |
Pablo Neira Ayuso | 5faa1f4 | 2007-09-28 14:43:53 -0700 | [diff] [blame] | 1265 | /* can't link an existing conntrack to a master */ |
| 1266 | if (cda[CTA_TUPLE_MASTER]) { |
Pablo Neira Ayuso | 0adf9d6 | 2008-06-09 15:56:20 -0700 | [diff] [blame] | 1267 | err = -EOPNOTSUPP; |
Pablo Neira Ayuso | 5faa1f4 | 2007-09-28 14:43:53 -0700 | [diff] [blame] | 1268 | goto out_unlock; |
| 1269 | } |
Pablo Neira Ayuso | ff4ca82 | 2007-08-07 18:11:26 -0700 | [diff] [blame] | 1270 | err = ctnetlink_change_conntrack(nf_ct_tuplehash_to_ctrack(h), |
| 1271 | cda); |
| 1272 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1273 | |
| 1274 | out_unlock: |
Patrick McHardy | f8ba1af | 2008-01-31 04:38:58 -0800 | [diff] [blame] | 1275 | spin_unlock_bh(&nf_conntrack_lock); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1276 | return err; |
| 1277 | } |
| 1278 | |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1279 | /*********************************************************************** |
| 1280 | * EXPECT |
| 1281 | ***********************************************************************/ |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1282 | |
| 1283 | static inline int |
| 1284 | ctnetlink_exp_dump_tuple(struct sk_buff *skb, |
| 1285 | const struct nf_conntrack_tuple *tuple, |
| 1286 | enum ctattr_expect type) |
| 1287 | { |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1288 | struct nlattr *nest_parms; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1289 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1290 | nest_parms = nla_nest_start(skb, type | NLA_F_NESTED); |
| 1291 | if (!nest_parms) |
| 1292 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1293 | if (ctnetlink_dump_tuples(skb, tuple) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1294 | goto nla_put_failure; |
| 1295 | nla_nest_end(skb, nest_parms); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1296 | |
| 1297 | return 0; |
| 1298 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1299 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1300 | return -1; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1301 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1302 | |
| 1303 | static inline int |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 1304 | ctnetlink_exp_dump_mask(struct sk_buff *skb, |
| 1305 | const struct nf_conntrack_tuple *tuple, |
Patrick McHardy | d4156e8 | 2007-07-07 22:31:32 -0700 | [diff] [blame] | 1306 | const struct nf_conntrack_tuple_mask *mask) |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 1307 | { |
| 1308 | int ret; |
| 1309 | struct nf_conntrack_l3proto *l3proto; |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 1310 | struct nf_conntrack_l4proto *l4proto; |
Patrick McHardy | d4156e8 | 2007-07-07 22:31:32 -0700 | [diff] [blame] | 1311 | struct nf_conntrack_tuple m; |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1312 | struct nlattr *nest_parms; |
Patrick McHardy | d4156e8 | 2007-07-07 22:31:32 -0700 | [diff] [blame] | 1313 | |
| 1314 | memset(&m, 0xFF, sizeof(m)); |
| 1315 | m.src.u.all = mask->src.u.all; |
| 1316 | memcpy(&m.src.u3, &mask->src.u3, sizeof(m.src.u3)); |
| 1317 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1318 | nest_parms = nla_nest_start(skb, CTA_EXPECT_MASK | NLA_F_NESTED); |
| 1319 | if (!nest_parms) |
| 1320 | goto nla_put_failure; |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 1321 | |
| 1322 | l3proto = nf_ct_l3proto_find_get(tuple->src.l3num); |
Patrick McHardy | d4156e8 | 2007-07-07 22:31:32 -0700 | [diff] [blame] | 1323 | ret = ctnetlink_dump_tuples_ip(skb, &m, l3proto); |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 1324 | nf_ct_l3proto_put(l3proto); |
| 1325 | |
| 1326 | if (unlikely(ret < 0)) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1327 | goto nla_put_failure; |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 1328 | |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 1329 | l4proto = nf_ct_l4proto_find_get(tuple->src.l3num, tuple->dst.protonum); |
Patrick McHardy | d4156e8 | 2007-07-07 22:31:32 -0700 | [diff] [blame] | 1330 | ret = ctnetlink_dump_tuples_proto(skb, &m, l4proto); |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 1331 | nf_ct_l4proto_put(l4proto); |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 1332 | if (unlikely(ret < 0)) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1333 | goto nla_put_failure; |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 1334 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1335 | nla_nest_end(skb, nest_parms); |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 1336 | |
| 1337 | return 0; |
| 1338 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1339 | nla_put_failure: |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 1340 | return -1; |
| 1341 | } |
| 1342 | |
Ilpo Järvinen | bb5cf80 | 2008-01-05 23:11:31 -0800 | [diff] [blame] | 1343 | static int |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1344 | ctnetlink_exp_dump_expect(struct sk_buff *skb, |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1345 | const struct nf_conntrack_expect *exp) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1346 | { |
| 1347 | struct nf_conn *master = exp->master; |
Patrick McHardy | d978e5d | 2007-12-17 22:37:03 -0800 | [diff] [blame] | 1348 | long timeout = (exp->timeout.expires - jiffies) / HZ; |
| 1349 | |
| 1350 | if (timeout < 0) |
| 1351 | timeout = 0; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1352 | |
| 1353 | if (ctnetlink_exp_dump_tuple(skb, &exp->tuple, CTA_EXPECT_TUPLE) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1354 | goto nla_put_failure; |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 1355 | if (ctnetlink_exp_dump_mask(skb, &exp->tuple, &exp->mask) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1356 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1357 | if (ctnetlink_exp_dump_tuple(skb, |
| 1358 | &master->tuplehash[IP_CT_DIR_ORIGINAL].tuple, |
| 1359 | CTA_EXPECT_MASTER) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1360 | goto nla_put_failure; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1361 | |
Patrick McHardy | d978e5d | 2007-12-17 22:37:03 -0800 | [diff] [blame] | 1362 | NLA_PUT_BE32(skb, CTA_EXPECT_TIMEOUT, htonl(timeout)); |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 1363 | NLA_PUT_BE32(skb, CTA_EXPECT_ID, htonl((unsigned long)exp)); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1364 | |
| 1365 | return 0; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1366 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1367 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1368 | return -1; |
| 1369 | } |
| 1370 | |
| 1371 | static int |
| 1372 | ctnetlink_exp_fill_info(struct sk_buff *skb, u32 pid, u32 seq, |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1373 | int event, |
| 1374 | int nowait, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1375 | const struct nf_conntrack_expect *exp) |
| 1376 | { |
| 1377 | struct nlmsghdr *nlh; |
| 1378 | struct nfgenmsg *nfmsg; |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 1379 | unsigned char *b = skb_tail_pointer(skb); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1380 | |
| 1381 | event |= NFNL_SUBSYS_CTNETLINK_EXP << 8; |
| 1382 | nlh = NLMSG_PUT(skb, pid, seq, event, sizeof(struct nfgenmsg)); |
| 1383 | nfmsg = NLMSG_DATA(nlh); |
| 1384 | |
| 1385 | nlh->nlmsg_flags = (nowait && pid) ? NLM_F_MULTI : 0; |
| 1386 | nfmsg->nfgen_family = exp->tuple.src.l3num; |
| 1387 | nfmsg->version = NFNETLINK_V0; |
| 1388 | nfmsg->res_id = 0; |
| 1389 | |
| 1390 | if (ctnetlink_exp_dump_expect(skb, exp) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1391 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1392 | |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 1393 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1394 | return skb->len; |
| 1395 | |
| 1396 | nlmsg_failure: |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1397 | nla_put_failure: |
Arnaldo Carvalho de Melo | dc5fc57 | 2007-03-25 23:06:12 -0700 | [diff] [blame] | 1398 | nlmsg_trim(skb, b); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1399 | return -1; |
| 1400 | } |
| 1401 | |
| 1402 | #ifdef CONFIG_NF_CONNTRACK_EVENTS |
| 1403 | static int ctnetlink_expect_event(struct notifier_block *this, |
| 1404 | unsigned long events, void *ptr) |
| 1405 | { |
| 1406 | struct nlmsghdr *nlh; |
| 1407 | struct nfgenmsg *nfmsg; |
| 1408 | struct nf_conntrack_expect *exp = (struct nf_conntrack_expect *)ptr; |
| 1409 | struct sk_buff *skb; |
| 1410 | unsigned int type; |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 1411 | sk_buff_data_t b; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1412 | int flags = 0; |
| 1413 | |
| 1414 | if (events & IPEXP_NEW) { |
| 1415 | type = IPCTNL_MSG_EXP_NEW; |
| 1416 | flags = NLM_F_CREATE|NLM_F_EXCL; |
| 1417 | } else |
| 1418 | return NOTIFY_DONE; |
| 1419 | |
Pablo Neira Ayuso | b3a27bf | 2006-08-22 00:32:05 -0700 | [diff] [blame] | 1420 | if (!nfnetlink_has_listeners(NFNLGRP_CONNTRACK_EXP_NEW)) |
| 1421 | return NOTIFY_DONE; |
| 1422 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1423 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC); |
| 1424 | if (!skb) |
| 1425 | return NOTIFY_DONE; |
| 1426 | |
| 1427 | b = skb->tail; |
| 1428 | |
Marcus Sundberg | b633ad5 | 2006-02-04 02:11:09 -0800 | [diff] [blame] | 1429 | type |= NFNL_SUBSYS_CTNETLINK_EXP << 8; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1430 | nlh = NLMSG_PUT(skb, 0, 0, type, sizeof(struct nfgenmsg)); |
| 1431 | nfmsg = NLMSG_DATA(nlh); |
| 1432 | |
| 1433 | nlh->nlmsg_flags = flags; |
| 1434 | nfmsg->nfgen_family = exp->tuple.src.l3num; |
| 1435 | nfmsg->version = NFNETLINK_V0; |
| 1436 | nfmsg->res_id = 0; |
| 1437 | |
| 1438 | if (ctnetlink_exp_dump_expect(skb, exp) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1439 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1440 | |
| 1441 | nlh->nlmsg_len = skb->tail - b; |
| 1442 | nfnetlink_send(skb, 0, NFNLGRP_CONNTRACK_EXP_NEW, 0); |
| 1443 | return NOTIFY_DONE; |
| 1444 | |
| 1445 | nlmsg_failure: |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1446 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1447 | kfree_skb(skb); |
| 1448 | return NOTIFY_DONE; |
| 1449 | } |
| 1450 | #endif |
Patrick McHardy | cf6994c | 2007-07-07 22:32:34 -0700 | [diff] [blame] | 1451 | static int ctnetlink_exp_done(struct netlink_callback *cb) |
| 1452 | { |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 1453 | if (cb->args[1]) |
| 1454 | nf_ct_expect_put((struct nf_conntrack_expect *)cb->args[1]); |
Patrick McHardy | cf6994c | 2007-07-07 22:32:34 -0700 | [diff] [blame] | 1455 | return 0; |
| 1456 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1457 | |
| 1458 | static int |
| 1459 | ctnetlink_exp_dump_table(struct sk_buff *skb, struct netlink_callback *cb) |
| 1460 | { |
Patrick McHardy | cf6994c | 2007-07-07 22:32:34 -0700 | [diff] [blame] | 1461 | struct nf_conntrack_expect *exp, *last; |
Pablo Neira Ayuso | 87711cb | 2006-01-05 12:19:23 -0800 | [diff] [blame] | 1462 | struct nfgenmsg *nfmsg = NLMSG_DATA(cb->nlh); |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 1463 | struct hlist_node *n; |
Pablo Neira Ayuso | 87711cb | 2006-01-05 12:19:23 -0800 | [diff] [blame] | 1464 | u_int8_t l3proto = nfmsg->nfgen_family; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1465 | |
Patrick McHardy | 7d0742d | 2008-01-31 04:38:19 -0800 | [diff] [blame] | 1466 | rcu_read_lock(); |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 1467 | last = (struct nf_conntrack_expect *)cb->args[1]; |
| 1468 | for (; cb->args[0] < nf_ct_expect_hsize; cb->args[0]++) { |
Patrick McHardy | cf6994c | 2007-07-07 22:32:34 -0700 | [diff] [blame] | 1469 | restart: |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 1470 | hlist_for_each_entry(exp, n, &nf_ct_expect_hash[cb->args[0]], |
| 1471 | hnode) { |
| 1472 | if (l3proto && exp->tuple.src.l3num != l3proto) |
Patrick McHardy | cf6994c | 2007-07-07 22:32:34 -0700 | [diff] [blame] | 1473 | continue; |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 1474 | if (cb->args[1]) { |
| 1475 | if (exp != last) |
| 1476 | continue; |
| 1477 | cb->args[1] = 0; |
| 1478 | } |
| 1479 | if (ctnetlink_exp_fill_info(skb, NETLINK_CB(cb->skb).pid, |
| 1480 | cb->nlh->nlmsg_seq, |
| 1481 | IPCTNL_MSG_EXP_NEW, |
| 1482 | 1, exp) < 0) { |
Patrick McHardy | 7d0742d | 2008-01-31 04:38:19 -0800 | [diff] [blame] | 1483 | if (!atomic_inc_not_zero(&exp->use)) |
| 1484 | continue; |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 1485 | cb->args[1] = (unsigned long)exp; |
| 1486 | goto out; |
| 1487 | } |
Patrick McHardy | cf6994c | 2007-07-07 22:32:34 -0700 | [diff] [blame] | 1488 | } |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 1489 | if (cb->args[1]) { |
| 1490 | cb->args[1] = 0; |
| 1491 | goto restart; |
Patrick McHardy | cf6994c | 2007-07-07 22:32:34 -0700 | [diff] [blame] | 1492 | } |
| 1493 | } |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1494 | out: |
Patrick McHardy | 7d0742d | 2008-01-31 04:38:19 -0800 | [diff] [blame] | 1495 | rcu_read_unlock(); |
Patrick McHardy | cf6994c | 2007-07-07 22:32:34 -0700 | [diff] [blame] | 1496 | if (last) |
| 1497 | nf_ct_expect_put(last); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1498 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1499 | return skb->len; |
| 1500 | } |
| 1501 | |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 1502 | static const struct nla_policy exp_nla_policy[CTA_EXPECT_MAX+1] = { |
| 1503 | [CTA_EXPECT_TIMEOUT] = { .type = NLA_U32 }, |
| 1504 | [CTA_EXPECT_ID] = { .type = NLA_U32 }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1505 | }; |
| 1506 | |
| 1507 | static int |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1508 | ctnetlink_get_expect(struct sock *ctnl, struct sk_buff *skb, |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1509 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1510 | { |
| 1511 | struct nf_conntrack_tuple tuple; |
| 1512 | struct nf_conntrack_expect *exp; |
| 1513 | struct sk_buff *skb2; |
| 1514 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); |
| 1515 | u_int8_t u3 = nfmsg->nfgen_family; |
| 1516 | int err = 0; |
| 1517 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1518 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
Thomas Graf | c702e80 | 2007-03-22 23:30:55 -0700 | [diff] [blame] | 1519 | return netlink_dump_start(ctnl, skb, nlh, |
| 1520 | ctnetlink_exp_dump_table, |
Patrick McHardy | cf6994c | 2007-07-07 22:32:34 -0700 | [diff] [blame] | 1521 | ctnetlink_exp_done); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1522 | } |
| 1523 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1524 | if (cda[CTA_EXPECT_MASTER]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1525 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_MASTER, u3); |
| 1526 | else |
| 1527 | return -EINVAL; |
| 1528 | |
| 1529 | if (err < 0) |
| 1530 | return err; |
| 1531 | |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 1532 | exp = nf_ct_expect_find_get(&tuple); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1533 | if (!exp) |
| 1534 | return -ENOENT; |
| 1535 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1536 | if (cda[CTA_EXPECT_ID]) { |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 1537 | __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]); |
Patrick McHardy | 3583240 | 2007-09-28 14:41:50 -0700 | [diff] [blame] | 1538 | if (ntohl(id) != (u32)(unsigned long)exp) { |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 1539 | nf_ct_expect_put(exp); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1540 | return -ENOENT; |
| 1541 | } |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1542 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1543 | |
| 1544 | err = -ENOMEM; |
| 1545 | skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); |
| 1546 | if (!skb2) |
| 1547 | goto out; |
Thomas Graf | 4e9b826 | 2006-11-27 09:25:58 -0800 | [diff] [blame] | 1548 | |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1549 | err = ctnetlink_exp_fill_info(skb2, NETLINK_CB(skb).pid, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1550 | nlh->nlmsg_seq, IPCTNL_MSG_EXP_NEW, |
| 1551 | 1, exp); |
| 1552 | if (err <= 0) |
| 1553 | goto free; |
| 1554 | |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 1555 | nf_ct_expect_put(exp); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1556 | |
| 1557 | return netlink_unicast(ctnl, skb2, NETLINK_CB(skb).pid, MSG_DONTWAIT); |
| 1558 | |
| 1559 | free: |
| 1560 | kfree_skb(skb2); |
| 1561 | out: |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 1562 | nf_ct_expect_put(exp); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1563 | return err; |
| 1564 | } |
| 1565 | |
| 1566 | static int |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1567 | ctnetlink_del_expect(struct sock *ctnl, struct sk_buff *skb, |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1568 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1569 | { |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 1570 | struct nf_conntrack_expect *exp; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1571 | struct nf_conntrack_tuple tuple; |
| 1572 | struct nf_conntrack_helper *h; |
| 1573 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 1574 | struct hlist_node *n, *next; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1575 | u_int8_t u3 = nfmsg->nfgen_family; |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 1576 | unsigned int i; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1577 | int err; |
| 1578 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1579 | if (cda[CTA_EXPECT_TUPLE]) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1580 | /* delete a single expect by tuple */ |
| 1581 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); |
| 1582 | if (err < 0) |
| 1583 | return err; |
| 1584 | |
| 1585 | /* bump usage count to 2 */ |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 1586 | exp = nf_ct_expect_find_get(&tuple); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1587 | if (!exp) |
| 1588 | return -ENOENT; |
| 1589 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1590 | if (cda[CTA_EXPECT_ID]) { |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 1591 | __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]); |
Patrick McHardy | 3583240 | 2007-09-28 14:41:50 -0700 | [diff] [blame] | 1592 | if (ntohl(id) != (u32)(unsigned long)exp) { |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 1593 | nf_ct_expect_put(exp); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1594 | return -ENOENT; |
| 1595 | } |
| 1596 | } |
| 1597 | |
| 1598 | /* after list removal, usage count == 1 */ |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 1599 | nf_ct_unexpect_related(exp); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1600 | /* have to put what we 'get' above. |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1601 | * after this line usage count == 0 */ |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 1602 | nf_ct_expect_put(exp); |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1603 | } else if (cda[CTA_EXPECT_HELP_NAME]) { |
| 1604 | char *name = nla_data(cda[CTA_EXPECT_HELP_NAME]); |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 1605 | struct nf_conn_help *m_help; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1606 | |
| 1607 | /* delete all expectations for this helper */ |
Patrick McHardy | f8ba1af | 2008-01-31 04:38:58 -0800 | [diff] [blame] | 1608 | spin_lock_bh(&nf_conntrack_lock); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1609 | h = __nf_conntrack_helper_find_byname(name); |
| 1610 | if (!h) { |
Patrick McHardy | f8ba1af | 2008-01-31 04:38:58 -0800 | [diff] [blame] | 1611 | spin_unlock_bh(&nf_conntrack_lock); |
Pablo Neira Ayuso | 0adf9d6 | 2008-06-09 15:56:20 -0700 | [diff] [blame] | 1612 | return -EOPNOTSUPP; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1613 | } |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 1614 | for (i = 0; i < nf_ct_expect_hsize; i++) { |
| 1615 | hlist_for_each_entry_safe(exp, n, next, |
| 1616 | &nf_ct_expect_hash[i], |
| 1617 | hnode) { |
| 1618 | m_help = nfct_help(exp->master); |
| 1619 | if (m_help->helper == h |
| 1620 | && del_timer(&exp->timeout)) { |
| 1621 | nf_ct_unlink_expect(exp); |
| 1622 | nf_ct_expect_put(exp); |
| 1623 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1624 | } |
| 1625 | } |
Patrick McHardy | f8ba1af | 2008-01-31 04:38:58 -0800 | [diff] [blame] | 1626 | spin_unlock_bh(&nf_conntrack_lock); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1627 | } else { |
| 1628 | /* This basically means we have to flush everything*/ |
Patrick McHardy | f8ba1af | 2008-01-31 04:38:58 -0800 | [diff] [blame] | 1629 | spin_lock_bh(&nf_conntrack_lock); |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 1630 | for (i = 0; i < nf_ct_expect_hsize; i++) { |
| 1631 | hlist_for_each_entry_safe(exp, n, next, |
| 1632 | &nf_ct_expect_hash[i], |
| 1633 | hnode) { |
| 1634 | if (del_timer(&exp->timeout)) { |
| 1635 | nf_ct_unlink_expect(exp); |
| 1636 | nf_ct_expect_put(exp); |
| 1637 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1638 | } |
| 1639 | } |
Patrick McHardy | f8ba1af | 2008-01-31 04:38:58 -0800 | [diff] [blame] | 1640 | spin_unlock_bh(&nf_conntrack_lock); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1641 | } |
| 1642 | |
| 1643 | return 0; |
| 1644 | } |
| 1645 | static int |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1646 | ctnetlink_change_expect(struct nf_conntrack_expect *x, struct nlattr *cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1647 | { |
| 1648 | return -EOPNOTSUPP; |
| 1649 | } |
| 1650 | |
| 1651 | static int |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1652 | ctnetlink_create_expect(struct nlattr *cda[], u_int8_t u3) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1653 | { |
| 1654 | struct nf_conntrack_tuple tuple, mask, master_tuple; |
| 1655 | struct nf_conntrack_tuple_hash *h = NULL; |
| 1656 | struct nf_conntrack_expect *exp; |
| 1657 | struct nf_conn *ct; |
Harald Welte | dc808fe | 2006-03-20 17:56:32 -0800 | [diff] [blame] | 1658 | struct nf_conn_help *help; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1659 | int err = 0; |
| 1660 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1661 | /* caller guarantees that those three CTA_EXPECT_* exist */ |
| 1662 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); |
| 1663 | if (err < 0) |
| 1664 | return err; |
| 1665 | err = ctnetlink_parse_tuple(cda, &mask, CTA_EXPECT_MASK, u3); |
| 1666 | if (err < 0) |
| 1667 | return err; |
| 1668 | err = ctnetlink_parse_tuple(cda, &master_tuple, CTA_EXPECT_MASTER, u3); |
| 1669 | if (err < 0) |
| 1670 | return err; |
| 1671 | |
| 1672 | /* Look for master conntrack of this expectation */ |
Alexey Dobriyan | 400dad3 | 2008-10-08 11:35:03 +0200 | [diff] [blame^] | 1673 | h = nf_conntrack_find_get(&init_net, &master_tuple); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1674 | if (!h) |
| 1675 | return -ENOENT; |
| 1676 | ct = nf_ct_tuplehash_to_ctrack(h); |
Harald Welte | dc808fe | 2006-03-20 17:56:32 -0800 | [diff] [blame] | 1677 | help = nfct_help(ct); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1678 | |
Harald Welte | dc808fe | 2006-03-20 17:56:32 -0800 | [diff] [blame] | 1679 | if (!help || !help->helper) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1680 | /* such conntrack hasn't got any helper, abort */ |
| 1681 | err = -EINVAL; |
| 1682 | goto out; |
| 1683 | } |
| 1684 | |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 1685 | exp = nf_ct_expect_alloc(ct); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1686 | if (!exp) { |
| 1687 | err = -ENOMEM; |
| 1688 | goto out; |
| 1689 | } |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1690 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1691 | exp->expectfn = NULL; |
| 1692 | exp->flags = 0; |
| 1693 | exp->master = ct; |
Patrick McHardy | 9457d85 | 2006-12-02 22:05:25 -0800 | [diff] [blame] | 1694 | exp->helper = NULL; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1695 | memcpy(&exp->tuple, &tuple, sizeof(struct nf_conntrack_tuple)); |
Patrick McHardy | d4156e8 | 2007-07-07 22:31:32 -0700 | [diff] [blame] | 1696 | memcpy(&exp->mask.src.u3, &mask.src.u3, sizeof(exp->mask.src.u3)); |
| 1697 | exp->mask.src.u.all = mask.src.u.all; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1698 | |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 1699 | err = nf_ct_expect_related(exp); |
| 1700 | nf_ct_expect_put(exp); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1701 | |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1702 | out: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1703 | nf_ct_put(nf_ct_tuplehash_to_ctrack(h)); |
| 1704 | return err; |
| 1705 | } |
| 1706 | |
| 1707 | static int |
| 1708 | ctnetlink_new_expect(struct sock *ctnl, struct sk_buff *skb, |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1709 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1710 | { |
| 1711 | struct nf_conntrack_tuple tuple; |
| 1712 | struct nf_conntrack_expect *exp; |
| 1713 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); |
| 1714 | u_int8_t u3 = nfmsg->nfgen_family; |
| 1715 | int err = 0; |
| 1716 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1717 | if (!cda[CTA_EXPECT_TUPLE] |
| 1718 | || !cda[CTA_EXPECT_MASK] |
| 1719 | || !cda[CTA_EXPECT_MASTER]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1720 | return -EINVAL; |
| 1721 | |
| 1722 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); |
| 1723 | if (err < 0) |
| 1724 | return err; |
| 1725 | |
Patrick McHardy | f8ba1af | 2008-01-31 04:38:58 -0800 | [diff] [blame] | 1726 | spin_lock_bh(&nf_conntrack_lock); |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 1727 | exp = __nf_ct_expect_find(&tuple); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1728 | |
| 1729 | if (!exp) { |
Patrick McHardy | f8ba1af | 2008-01-31 04:38:58 -0800 | [diff] [blame] | 1730 | spin_unlock_bh(&nf_conntrack_lock); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1731 | err = -ENOENT; |
| 1732 | if (nlh->nlmsg_flags & NLM_F_CREATE) |
| 1733 | err = ctnetlink_create_expect(cda, u3); |
| 1734 | return err; |
| 1735 | } |
| 1736 | |
| 1737 | err = -EEXIST; |
| 1738 | if (!(nlh->nlmsg_flags & NLM_F_EXCL)) |
| 1739 | err = ctnetlink_change_expect(exp, cda); |
Patrick McHardy | f8ba1af | 2008-01-31 04:38:58 -0800 | [diff] [blame] | 1740 | spin_unlock_bh(&nf_conntrack_lock); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1741 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1742 | return err; |
| 1743 | } |
| 1744 | |
| 1745 | #ifdef CONFIG_NF_CONNTRACK_EVENTS |
| 1746 | static struct notifier_block ctnl_notifier = { |
| 1747 | .notifier_call = ctnetlink_conntrack_event, |
| 1748 | }; |
| 1749 | |
| 1750 | static struct notifier_block ctnl_notifier_exp = { |
| 1751 | .notifier_call = ctnetlink_expect_event, |
| 1752 | }; |
| 1753 | #endif |
| 1754 | |
Patrick McHardy | 7c8d4cb | 2007-09-28 14:15:45 -0700 | [diff] [blame] | 1755 | static const struct nfnl_callback ctnl_cb[IPCTNL_MSG_MAX] = { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1756 | [IPCTNL_MSG_CT_NEW] = { .call = ctnetlink_new_conntrack, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 1757 | .attr_count = CTA_MAX, |
| 1758 | .policy = ct_nla_policy }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1759 | [IPCTNL_MSG_CT_GET] = { .call = ctnetlink_get_conntrack, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 1760 | .attr_count = CTA_MAX, |
| 1761 | .policy = ct_nla_policy }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1762 | [IPCTNL_MSG_CT_DELETE] = { .call = ctnetlink_del_conntrack, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 1763 | .attr_count = CTA_MAX, |
| 1764 | .policy = ct_nla_policy }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1765 | [IPCTNL_MSG_CT_GET_CTRZERO] = { .call = ctnetlink_get_conntrack, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 1766 | .attr_count = CTA_MAX, |
| 1767 | .policy = ct_nla_policy }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1768 | }; |
| 1769 | |
Patrick McHardy | 7c8d4cb | 2007-09-28 14:15:45 -0700 | [diff] [blame] | 1770 | static const struct nfnl_callback ctnl_exp_cb[IPCTNL_MSG_EXP_MAX] = { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1771 | [IPCTNL_MSG_EXP_GET] = { .call = ctnetlink_get_expect, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 1772 | .attr_count = CTA_EXPECT_MAX, |
| 1773 | .policy = exp_nla_policy }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1774 | [IPCTNL_MSG_EXP_NEW] = { .call = ctnetlink_new_expect, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 1775 | .attr_count = CTA_EXPECT_MAX, |
| 1776 | .policy = exp_nla_policy }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1777 | [IPCTNL_MSG_EXP_DELETE] = { .call = ctnetlink_del_expect, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 1778 | .attr_count = CTA_EXPECT_MAX, |
| 1779 | .policy = exp_nla_policy }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1780 | }; |
| 1781 | |
Patrick McHardy | 7c8d4cb | 2007-09-28 14:15:45 -0700 | [diff] [blame] | 1782 | static const struct nfnetlink_subsystem ctnl_subsys = { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1783 | .name = "conntrack", |
| 1784 | .subsys_id = NFNL_SUBSYS_CTNETLINK, |
| 1785 | .cb_count = IPCTNL_MSG_MAX, |
| 1786 | .cb = ctnl_cb, |
| 1787 | }; |
| 1788 | |
Patrick McHardy | 7c8d4cb | 2007-09-28 14:15:45 -0700 | [diff] [blame] | 1789 | static const struct nfnetlink_subsystem ctnl_exp_subsys = { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1790 | .name = "conntrack_expect", |
| 1791 | .subsys_id = NFNL_SUBSYS_CTNETLINK_EXP, |
| 1792 | .cb_count = IPCTNL_MSG_EXP_MAX, |
| 1793 | .cb = ctnl_exp_cb, |
| 1794 | }; |
| 1795 | |
Patrick McHardy | d2483dd | 2006-12-02 22:06:05 -0800 | [diff] [blame] | 1796 | MODULE_ALIAS("ip_conntrack_netlink"); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1797 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK); |
Pablo Neira Ayuso | 34f9a2e | 2006-02-04 02:11:41 -0800 | [diff] [blame] | 1798 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK_EXP); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1799 | |
| 1800 | static int __init ctnetlink_init(void) |
| 1801 | { |
| 1802 | int ret; |
| 1803 | |
| 1804 | printk("ctnetlink v%s: registering with nfnetlink.\n", version); |
| 1805 | ret = nfnetlink_subsys_register(&ctnl_subsys); |
| 1806 | if (ret < 0) { |
| 1807 | printk("ctnetlink_init: cannot register with nfnetlink.\n"); |
| 1808 | goto err_out; |
| 1809 | } |
| 1810 | |
| 1811 | ret = nfnetlink_subsys_register(&ctnl_exp_subsys); |
| 1812 | if (ret < 0) { |
| 1813 | printk("ctnetlink_init: cannot register exp with nfnetlink.\n"); |
| 1814 | goto err_unreg_subsys; |
| 1815 | } |
| 1816 | |
| 1817 | #ifdef CONFIG_NF_CONNTRACK_EVENTS |
| 1818 | ret = nf_conntrack_register_notifier(&ctnl_notifier); |
| 1819 | if (ret < 0) { |
| 1820 | printk("ctnetlink_init: cannot register notifier.\n"); |
| 1821 | goto err_unreg_exp_subsys; |
| 1822 | } |
| 1823 | |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 1824 | ret = nf_ct_expect_register_notifier(&ctnl_notifier_exp); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1825 | if (ret < 0) { |
| 1826 | printk("ctnetlink_init: cannot expect register notifier.\n"); |
| 1827 | goto err_unreg_notifier; |
| 1828 | } |
| 1829 | #endif |
| 1830 | |
| 1831 | return 0; |
| 1832 | |
| 1833 | #ifdef CONFIG_NF_CONNTRACK_EVENTS |
| 1834 | err_unreg_notifier: |
| 1835 | nf_conntrack_unregister_notifier(&ctnl_notifier); |
| 1836 | err_unreg_exp_subsys: |
| 1837 | nfnetlink_subsys_unregister(&ctnl_exp_subsys); |
| 1838 | #endif |
| 1839 | err_unreg_subsys: |
| 1840 | nfnetlink_subsys_unregister(&ctnl_subsys); |
| 1841 | err_out: |
| 1842 | return ret; |
| 1843 | } |
| 1844 | |
| 1845 | static void __exit ctnetlink_exit(void) |
| 1846 | { |
| 1847 | printk("ctnetlink: unregistering from nfnetlink.\n"); |
| 1848 | |
| 1849 | #ifdef CONFIG_NF_CONNTRACK_EVENTS |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 1850 | nf_ct_expect_unregister_notifier(&ctnl_notifier_exp); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1851 | nf_conntrack_unregister_notifier(&ctnl_notifier); |
| 1852 | #endif |
| 1853 | |
| 1854 | nfnetlink_subsys_unregister(&ctnl_exp_subsys); |
| 1855 | nfnetlink_subsys_unregister(&ctnl_subsys); |
| 1856 | return; |
| 1857 | } |
| 1858 | |
| 1859 | module_init(ctnetlink_init); |
| 1860 | module_exit(ctnetlink_exit); |