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 | 70e9942 | 2011-11-22 00:16:51 +0100 | [diff] [blame] | 7 | * (C) 2005-2011 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> |
Eric Dumazet | ea781f1 | 2009-03-25 21:05:46 +0100 | [diff] [blame] | 22 | #include <linux/rculist_nulls.h> |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 23 | #include <linux/types.h> |
| 24 | #include <linux/timer.h> |
Eric Paris | 1cc6324 | 2010-10-13 16:24:54 -0400 | [diff] [blame] | 25 | #include <linux/security.h> |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 26 | #include <linux/skbuff.h> |
| 27 | #include <linux/errno.h> |
| 28 | #include <linux/netlink.h> |
| 29 | #include <linux/spinlock.h> |
Yasuyuki Kozakai | 40a839f | 2006-06-27 03:00:35 -0700 | [diff] [blame] | 30 | #include <linux/interrupt.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 31 | #include <linux/slab.h> |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 32 | |
| 33 | #include <linux/netfilter.h> |
Arnaldo Carvalho de Melo | dc5fc57 | 2007-03-25 23:06:12 -0700 | [diff] [blame] | 34 | #include <net/netlink.h> |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 35 | #include <net/sock.h> |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 36 | #include <net/netfilter/nf_conntrack.h> |
| 37 | #include <net/netfilter/nf_conntrack_core.h> |
Martin Josefsson | 77ab9cf | 2006-11-29 02:34:58 +0100 | [diff] [blame] | 38 | #include <net/netfilter/nf_conntrack_expect.h> |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 39 | #include <net/netfilter/nf_conntrack_helper.h> |
| 40 | #include <net/netfilter/nf_conntrack_l3proto.h> |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 41 | #include <net/netfilter/nf_conntrack_l4proto.h> |
Jozsef Kadlecsik | 5b1158e | 2006-12-02 22:07:13 -0800 | [diff] [blame] | 42 | #include <net/netfilter/nf_conntrack_tuple.h> |
Krzysztof Piotr Oledzki | 5840157 | 2008-07-21 10:01:34 -0700 | [diff] [blame] | 43 | #include <net/netfilter/nf_conntrack_acct.h> |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 44 | #include <net/netfilter/nf_conntrack_zones.h> |
Pablo Neira Ayuso | a992ca2 | 2011-01-19 16:00:07 +0100 | [diff] [blame] | 45 | #include <net/netfilter/nf_conntrack_timestamp.h> |
Jozsef Kadlecsik | 5b1158e | 2006-12-02 22:07:13 -0800 | [diff] [blame] | 46 | #ifdef CONFIG_NF_NAT_NEEDED |
| 47 | #include <net/netfilter/nf_nat_core.h> |
| 48 | #include <net/netfilter/nf_nat_protocol.h> |
| 49 | #endif |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 50 | |
| 51 | #include <linux/netfilter/nfnetlink.h> |
| 52 | #include <linux/netfilter/nfnetlink_conntrack.h> |
| 53 | |
| 54 | MODULE_LICENSE("GPL"); |
| 55 | |
Harald Welte | dc808fe | 2006-03-20 17:56:32 -0800 | [diff] [blame] | 56 | static char __initdata version[] = "0.93"; |
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 | static inline int |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 59 | ctnetlink_dump_tuples_proto(struct sk_buff *skb, |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 60 | const struct nf_conntrack_tuple *tuple, |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 61 | struct nf_conntrack_l4proto *l4proto) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 62 | { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 63 | int ret = 0; |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 64 | struct nlattr *nest_parms; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 65 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 66 | nest_parms = nla_nest_start(skb, CTA_TUPLE_PROTO | NLA_F_NESTED); |
| 67 | if (!nest_parms) |
| 68 | goto nla_put_failure; |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 69 | if (nla_put_u8(skb, CTA_PROTO_NUM, tuple->dst.protonum)) |
| 70 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 71 | |
Patrick McHardy | fdf7083 | 2007-09-28 14:37:41 -0700 | [diff] [blame] | 72 | if (likely(l4proto->tuple_to_nlattr)) |
| 73 | ret = l4proto->tuple_to_nlattr(skb, tuple); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 74 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 75 | nla_nest_end(skb, nest_parms); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 76 | |
| 77 | return ret; |
| 78 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 79 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 80 | return -1; |
| 81 | } |
| 82 | |
| 83 | static inline int |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 84 | ctnetlink_dump_tuples_ip(struct sk_buff *skb, |
| 85 | const struct nf_conntrack_tuple *tuple, |
| 86 | struct nf_conntrack_l3proto *l3proto) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 87 | { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 88 | int ret = 0; |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 89 | struct nlattr *nest_parms; |
| 90 | |
| 91 | nest_parms = nla_nest_start(skb, CTA_TUPLE_IP | NLA_F_NESTED); |
| 92 | if (!nest_parms) |
| 93 | goto nla_put_failure; |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 94 | |
Patrick McHardy | fdf7083 | 2007-09-28 14:37:41 -0700 | [diff] [blame] | 95 | if (likely(l3proto->tuple_to_nlattr)) |
| 96 | ret = l3proto->tuple_to_nlattr(skb, tuple); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 97 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 98 | nla_nest_end(skb, nest_parms); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 99 | |
| 100 | return ret; |
| 101 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 102 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 103 | return -1; |
| 104 | } |
| 105 | |
Ilpo Järvinen | bb5cf80 | 2008-01-05 23:11:31 -0800 | [diff] [blame] | 106 | static int |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 107 | ctnetlink_dump_tuples(struct sk_buff *skb, |
| 108 | const struct nf_conntrack_tuple *tuple) |
| 109 | { |
| 110 | int ret; |
| 111 | struct nf_conntrack_l3proto *l3proto; |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 112 | struct nf_conntrack_l4proto *l4proto; |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 113 | |
Hans Schillstrom | 3b988ec | 2012-03-05 02:24:29 +0000 | [diff] [blame] | 114 | rcu_read_lock(); |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 115 | l3proto = __nf_ct_l3proto_find(tuple->src.l3num); |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 116 | ret = ctnetlink_dump_tuples_ip(skb, tuple, l3proto); |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 117 | |
Hans Schillstrom | 3b988ec | 2012-03-05 02:24:29 +0000 | [diff] [blame] | 118 | if (ret >= 0) { |
| 119 | l4proto = __nf_ct_l4proto_find(tuple->src.l3num, |
| 120 | tuple->dst.protonum); |
| 121 | ret = ctnetlink_dump_tuples_proto(skb, tuple, l4proto); |
| 122 | } |
| 123 | rcu_read_unlock(); |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 124 | return ret; |
| 125 | } |
| 126 | |
| 127 | static inline int |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 128 | ctnetlink_dump_status(struct sk_buff *skb, const struct nf_conn *ct) |
| 129 | { |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 130 | if (nla_put_be32(skb, CTA_STATUS, htonl(ct->status))) |
| 131 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 132 | return 0; |
| 133 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 134 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 135 | return -1; |
| 136 | } |
| 137 | |
| 138 | static inline int |
| 139 | ctnetlink_dump_timeout(struct sk_buff *skb, const struct nf_conn *ct) |
| 140 | { |
Xi Wang | c121638 | 2011-12-30 10:40:17 -0500 | [diff] [blame] | 141 | long timeout = ((long)ct->timeout.expires - (long)jiffies) / HZ; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 142 | |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 143 | if (timeout < 0) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 144 | timeout = 0; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 145 | |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 146 | if (nla_put_be32(skb, CTA_TIMEOUT, htonl(timeout))) |
| 147 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 148 | return 0; |
| 149 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 150 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 151 | return -1; |
| 152 | } |
| 153 | |
| 154 | static inline int |
Patrick McHardy | 440f0d5 | 2009-06-10 14:32:47 +0200 | [diff] [blame] | 155 | ctnetlink_dump_protoinfo(struct sk_buff *skb, struct nf_conn *ct) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 156 | { |
Patrick McHardy | 5e8fbe2 | 2008-04-14 11:15:52 +0200 | [diff] [blame] | 157 | struct nf_conntrack_l4proto *l4proto; |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 158 | struct nlattr *nest_proto; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 159 | int ret; |
| 160 | |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 161 | l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct)); |
| 162 | if (!l4proto->to_nlattr) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 163 | return 0; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 164 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 165 | nest_proto = nla_nest_start(skb, CTA_PROTOINFO | NLA_F_NESTED); |
| 166 | if (!nest_proto) |
| 167 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 168 | |
Patrick McHardy | fdf7083 | 2007-09-28 14:37:41 -0700 | [diff] [blame] | 169 | ret = l4proto->to_nlattr(skb, nest_proto, ct); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 170 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 171 | nla_nest_end(skb, nest_proto); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 172 | |
| 173 | return ret; |
| 174 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 175 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 176 | return -1; |
| 177 | } |
| 178 | |
| 179 | static inline int |
| 180 | ctnetlink_dump_helpinfo(struct sk_buff *skb, const struct nf_conn *ct) |
| 181 | { |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 182 | struct nlattr *nest_helper; |
Harald Welte | dc808fe | 2006-03-20 17:56:32 -0800 | [diff] [blame] | 183 | const struct nf_conn_help *help = nfct_help(ct); |
Patrick McHarrdy | 3c158f7 | 2007-06-05 12:55:27 -0700 | [diff] [blame] | 184 | struct nf_conntrack_helper *helper; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 185 | |
Patrick McHarrdy | 3c158f7 | 2007-06-05 12:55:27 -0700 | [diff] [blame] | 186 | if (!help) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 187 | return 0; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 188 | |
Patrick McHarrdy | 3c158f7 | 2007-06-05 12:55:27 -0700 | [diff] [blame] | 189 | helper = rcu_dereference(help->helper); |
| 190 | if (!helper) |
| 191 | goto out; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 192 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 193 | nest_helper = nla_nest_start(skb, CTA_HELP | NLA_F_NESTED); |
| 194 | if (!nest_helper) |
| 195 | goto nla_put_failure; |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 196 | if (nla_put_string(skb, CTA_HELP_NAME, helper->name)) |
| 197 | goto nla_put_failure; |
Patrick McHarrdy | 3c158f7 | 2007-06-05 12:55:27 -0700 | [diff] [blame] | 198 | |
Patrick McHardy | fdf7083 | 2007-09-28 14:37:41 -0700 | [diff] [blame] | 199 | if (helper->to_nlattr) |
| 200 | helper->to_nlattr(skb, ct); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 201 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 202 | nla_nest_end(skb, nest_helper); |
Patrick McHarrdy | 3c158f7 | 2007-06-05 12:55:27 -0700 | [diff] [blame] | 203 | out: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 204 | return 0; |
| 205 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 206 | nla_put_failure: |
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 | 80e60e6 | 2011-12-24 14:11:39 +0100 | [diff] [blame] | 211 | dump_counters(struct sk_buff *skb, u64 pkts, u64 bytes, |
| 212 | enum ip_conntrack_dir dir) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 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; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 216 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 217 | nest_count = nla_nest_start(skb, type | NLA_F_NESTED); |
| 218 | if (!nest_count) |
| 219 | goto nla_put_failure; |
| 220 | |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 221 | if (nla_put_be64(skb, CTA_COUNTERS_PACKETS, cpu_to_be64(pkts)) || |
| 222 | nla_put_be64(skb, CTA_COUNTERS_BYTES, cpu_to_be64(bytes))) |
| 223 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 224 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 225 | nla_nest_end(skb, nest_count); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 226 | |
| 227 | return 0; |
| 228 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 229 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 230 | return -1; |
| 231 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 232 | |
Pablo Neira Ayuso | a992ca2 | 2011-01-19 16:00:07 +0100 | [diff] [blame] | 233 | static int |
Pablo Neira Ayuso | 80e60e6 | 2011-12-24 14:11:39 +0100 | [diff] [blame] | 234 | ctnetlink_dump_counters(struct sk_buff *skb, const struct nf_conn *ct, |
| 235 | enum ip_conntrack_dir dir, int type) |
| 236 | { |
| 237 | struct nf_conn_counter *acct; |
| 238 | u64 pkts, bytes; |
| 239 | |
| 240 | acct = nf_conn_acct_find(ct); |
| 241 | if (!acct) |
| 242 | return 0; |
| 243 | |
| 244 | if (type == IPCTNL_MSG_CT_GET_CTRZERO) { |
| 245 | pkts = atomic64_xchg(&acct[dir].packets, 0); |
| 246 | bytes = atomic64_xchg(&acct[dir].bytes, 0); |
| 247 | } else { |
| 248 | pkts = atomic64_read(&acct[dir].packets); |
| 249 | bytes = atomic64_read(&acct[dir].bytes); |
| 250 | } |
| 251 | return dump_counters(skb, pkts, bytes, dir); |
| 252 | } |
| 253 | |
| 254 | static int |
Pablo Neira Ayuso | a992ca2 | 2011-01-19 16:00:07 +0100 | [diff] [blame] | 255 | ctnetlink_dump_timestamp(struct sk_buff *skb, const struct nf_conn *ct) |
| 256 | { |
| 257 | struct nlattr *nest_count; |
| 258 | const struct nf_conn_tstamp *tstamp; |
| 259 | |
| 260 | tstamp = nf_conn_tstamp_find(ct); |
| 261 | if (!tstamp) |
| 262 | return 0; |
| 263 | |
| 264 | nest_count = nla_nest_start(skb, CTA_TIMESTAMP | NLA_F_NESTED); |
| 265 | if (!nest_count) |
| 266 | goto nla_put_failure; |
| 267 | |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 268 | if (nla_put_be64(skb, CTA_TIMESTAMP_START, cpu_to_be64(tstamp->start)) || |
| 269 | (tstamp->stop != 0 && nla_put_be64(skb, CTA_TIMESTAMP_STOP, |
| 270 | cpu_to_be64(tstamp->stop)))) |
| 271 | goto nla_put_failure; |
Pablo Neira Ayuso | a992ca2 | 2011-01-19 16:00:07 +0100 | [diff] [blame] | 272 | nla_nest_end(skb, nest_count); |
| 273 | |
| 274 | return 0; |
| 275 | |
| 276 | nla_put_failure: |
| 277 | return -1; |
| 278 | } |
| 279 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 280 | #ifdef CONFIG_NF_CONNTRACK_MARK |
| 281 | static inline int |
| 282 | ctnetlink_dump_mark(struct sk_buff *skb, const struct nf_conn *ct) |
| 283 | { |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 284 | if (nla_put_be32(skb, CTA_MARK, htonl(ct->mark))) |
| 285 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 286 | return 0; |
| 287 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 288 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 289 | return -1; |
| 290 | } |
| 291 | #else |
| 292 | #define ctnetlink_dump_mark(a, b) (0) |
| 293 | #endif |
| 294 | |
Pablo Neira Ayuso | 37fccd8 | 2007-12-17 22:28:41 -0800 | [diff] [blame] | 295 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
| 296 | static inline int |
Eric Paris | 1cc6324 | 2010-10-13 16:24:54 -0400 | [diff] [blame] | 297 | ctnetlink_dump_secctx(struct sk_buff *skb, const struct nf_conn *ct) |
Pablo Neira Ayuso | 37fccd8 | 2007-12-17 22:28:41 -0800 | [diff] [blame] | 298 | { |
Eric Paris | 1cc6324 | 2010-10-13 16:24:54 -0400 | [diff] [blame] | 299 | struct nlattr *nest_secctx; |
| 300 | int len, ret; |
| 301 | char *secctx; |
Pablo Neira Ayuso | 37fccd8 | 2007-12-17 22:28:41 -0800 | [diff] [blame] | 302 | |
Eric Paris | 1cc6324 | 2010-10-13 16:24:54 -0400 | [diff] [blame] | 303 | ret = security_secid_to_secctx(ct->secmark, &secctx, &len); |
| 304 | if (ret) |
Pablo Neira Ayuso | cba85b5 | 2011-01-06 11:25:00 -0800 | [diff] [blame] | 305 | return 0; |
Eric Paris | 1cc6324 | 2010-10-13 16:24:54 -0400 | [diff] [blame] | 306 | |
| 307 | ret = -1; |
| 308 | nest_secctx = nla_nest_start(skb, CTA_SECCTX | NLA_F_NESTED); |
| 309 | if (!nest_secctx) |
| 310 | goto nla_put_failure; |
| 311 | |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 312 | if (nla_put_string(skb, CTA_SECCTX_NAME, secctx)) |
| 313 | goto nla_put_failure; |
Eric Paris | 1cc6324 | 2010-10-13 16:24:54 -0400 | [diff] [blame] | 314 | nla_nest_end(skb, nest_secctx); |
| 315 | |
| 316 | ret = 0; |
Pablo Neira Ayuso | 37fccd8 | 2007-12-17 22:28:41 -0800 | [diff] [blame] | 317 | nla_put_failure: |
Eric Paris | 1cc6324 | 2010-10-13 16:24:54 -0400 | [diff] [blame] | 318 | security_release_secctx(secctx, len); |
| 319 | return ret; |
Pablo Neira Ayuso | 37fccd8 | 2007-12-17 22:28:41 -0800 | [diff] [blame] | 320 | } |
| 321 | #else |
Eric Paris | 1cc6324 | 2010-10-13 16:24:54 -0400 | [diff] [blame] | 322 | #define ctnetlink_dump_secctx(a, b) (0) |
Pablo Neira Ayuso | 37fccd8 | 2007-12-17 22:28:41 -0800 | [diff] [blame] | 323 | #endif |
| 324 | |
Pablo Neira Ayuso | 0f417ce | 2007-12-17 22:28:19 -0800 | [diff] [blame] | 325 | #define master_tuple(ct) &(ct->master->tuplehash[IP_CT_DIR_ORIGINAL].tuple) |
| 326 | |
| 327 | static inline int |
| 328 | ctnetlink_dump_master(struct sk_buff *skb, const struct nf_conn *ct) |
| 329 | { |
| 330 | struct nlattr *nest_parms; |
| 331 | |
| 332 | if (!(ct->status & IPS_EXPECTED)) |
| 333 | return 0; |
| 334 | |
| 335 | nest_parms = nla_nest_start(skb, CTA_TUPLE_MASTER | NLA_F_NESTED); |
| 336 | if (!nest_parms) |
| 337 | goto nla_put_failure; |
| 338 | if (ctnetlink_dump_tuples(skb, master_tuple(ct)) < 0) |
| 339 | goto nla_put_failure; |
| 340 | nla_nest_end(skb, nest_parms); |
| 341 | |
| 342 | return 0; |
| 343 | |
| 344 | nla_put_failure: |
| 345 | return -1; |
| 346 | } |
| 347 | |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 348 | #ifdef CONFIG_NF_NAT_NEEDED |
Ilpo Järvinen | bb5cf80 | 2008-01-05 23:11:31 -0800 | [diff] [blame] | 349 | static int |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 350 | dump_nat_seq_adj(struct sk_buff *skb, const struct nf_nat_seq *natseq, int type) |
| 351 | { |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 352 | struct nlattr *nest_parms; |
| 353 | |
| 354 | nest_parms = nla_nest_start(skb, type | NLA_F_NESTED); |
| 355 | if (!nest_parms) |
| 356 | goto nla_put_failure; |
| 357 | |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 358 | if (nla_put_be32(skb, CTA_NAT_SEQ_CORRECTION_POS, |
| 359 | htonl(natseq->correction_pos)) || |
| 360 | nla_put_be32(skb, CTA_NAT_SEQ_OFFSET_BEFORE, |
| 361 | htonl(natseq->offset_before)) || |
| 362 | nla_put_be32(skb, CTA_NAT_SEQ_OFFSET_AFTER, |
| 363 | htonl(natseq->offset_after))) |
| 364 | goto nla_put_failure; |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 365 | |
| 366 | nla_nest_end(skb, nest_parms); |
| 367 | |
| 368 | return 0; |
| 369 | |
| 370 | nla_put_failure: |
| 371 | return -1; |
| 372 | } |
| 373 | |
| 374 | static inline int |
| 375 | ctnetlink_dump_nat_seq_adj(struct sk_buff *skb, const struct nf_conn *ct) |
| 376 | { |
| 377 | struct nf_nat_seq *natseq; |
| 378 | struct nf_conn_nat *nat = nfct_nat(ct); |
| 379 | |
| 380 | if (!(ct->status & IPS_SEQ_ADJUST) || !nat) |
| 381 | return 0; |
| 382 | |
| 383 | natseq = &nat->seq[IP_CT_DIR_ORIGINAL]; |
| 384 | if (dump_nat_seq_adj(skb, natseq, CTA_NAT_SEQ_ADJ_ORIG) == -1) |
| 385 | return -1; |
| 386 | |
| 387 | natseq = &nat->seq[IP_CT_DIR_REPLY]; |
| 388 | if (dump_nat_seq_adj(skb, natseq, CTA_NAT_SEQ_ADJ_REPLY) == -1) |
| 389 | return -1; |
| 390 | |
| 391 | return 0; |
| 392 | } |
| 393 | #else |
| 394 | #define ctnetlink_dump_nat_seq_adj(a, b) (0) |
| 395 | #endif |
| 396 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 397 | static inline int |
| 398 | ctnetlink_dump_id(struct sk_buff *skb, const struct nf_conn *ct) |
| 399 | { |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 400 | if (nla_put_be32(skb, CTA_ID, htonl((unsigned long)ct))) |
| 401 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 402 | return 0; |
| 403 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 404 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 405 | return -1; |
| 406 | } |
| 407 | |
| 408 | static inline int |
| 409 | ctnetlink_dump_use(struct sk_buff *skb, const struct nf_conn *ct) |
| 410 | { |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 411 | if (nla_put_be32(skb, CTA_USE, htonl(atomic_read(&ct->ct_general.use)))) |
| 412 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 413 | return 0; |
| 414 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 415 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 416 | return -1; |
| 417 | } |
| 418 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 419 | static int |
Pablo Neira Ayuso | 80e60e6 | 2011-12-24 14:11:39 +0100 | [diff] [blame] | 420 | ctnetlink_fill_info(struct sk_buff *skb, u32 pid, u32 seq, u32 type, |
| 421 | struct nf_conn *ct) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 422 | { |
| 423 | struct nlmsghdr *nlh; |
| 424 | struct nfgenmsg *nfmsg; |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 425 | struct nlattr *nest_parms; |
Pablo Neira Ayuso | 80e60e6 | 2011-12-24 14:11:39 +0100 | [diff] [blame] | 426 | unsigned int flags = pid ? NLM_F_MULTI : 0, event; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 427 | |
Pablo Neira Ayuso | 80e60e6 | 2011-12-24 14:11:39 +0100 | [diff] [blame] | 428 | event = (NFNL_SUBSYS_CTNETLINK << 8 | IPCTNL_MSG_CT_NEW); |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 429 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*nfmsg), flags); |
| 430 | if (nlh == NULL) |
| 431 | goto nlmsg_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 432 | |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 433 | nfmsg = nlmsg_data(nlh); |
Patrick McHardy | 5e8fbe2 | 2008-04-14 11:15:52 +0200 | [diff] [blame] | 434 | nfmsg->nfgen_family = nf_ct_l3num(ct); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 435 | nfmsg->version = NFNETLINK_V0; |
| 436 | nfmsg->res_id = 0; |
| 437 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 438 | nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED); |
| 439 | if (!nest_parms) |
| 440 | goto nla_put_failure; |
Pablo Neira Ayuso | f2f3e38 | 2009-06-02 20:03:35 +0200 | [diff] [blame] | 441 | if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 442 | goto nla_put_failure; |
| 443 | nla_nest_end(skb, nest_parms); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 444 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 445 | nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED); |
| 446 | if (!nest_parms) |
| 447 | goto nla_put_failure; |
Pablo Neira Ayuso | f2f3e38 | 2009-06-02 20:03:35 +0200 | [diff] [blame] | 448 | if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 449 | goto nla_put_failure; |
| 450 | nla_nest_end(skb, nest_parms); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 451 | |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 452 | if (nf_ct_zone(ct) && |
| 453 | nla_put_be16(skb, CTA_ZONE, htons(nf_ct_zone(ct)))) |
| 454 | goto nla_put_failure; |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 455 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 456 | if (ctnetlink_dump_status(skb, ct) < 0 || |
| 457 | ctnetlink_dump_timeout(skb, ct) < 0 || |
Pablo Neira Ayuso | 80e60e6 | 2011-12-24 14:11:39 +0100 | [diff] [blame] | 458 | ctnetlink_dump_counters(skb, ct, IP_CT_DIR_ORIGINAL, type) < 0 || |
| 459 | ctnetlink_dump_counters(skb, ct, IP_CT_DIR_REPLY, type) < 0 || |
Pablo Neira Ayuso | a992ca2 | 2011-01-19 16:00:07 +0100 | [diff] [blame] | 460 | ctnetlink_dump_timestamp(skb, ct) < 0 || |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 461 | ctnetlink_dump_protoinfo(skb, ct) < 0 || |
| 462 | ctnetlink_dump_helpinfo(skb, ct) < 0 || |
| 463 | ctnetlink_dump_mark(skb, ct) < 0 || |
Eric Paris | 1cc6324 | 2010-10-13 16:24:54 -0400 | [diff] [blame] | 464 | ctnetlink_dump_secctx(skb, ct) < 0 || |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 465 | ctnetlink_dump_id(skb, ct) < 0 || |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 466 | ctnetlink_dump_use(skb, ct) < 0 || |
Pablo Neira Ayuso | 0f417ce | 2007-12-17 22:28:19 -0800 | [diff] [blame] | 467 | ctnetlink_dump_master(skb, ct) < 0 || |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 468 | ctnetlink_dump_nat_seq_adj(skb, ct) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 469 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 470 | |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 471 | nlmsg_end(skb, nlh); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 472 | return skb->len; |
| 473 | |
| 474 | nlmsg_failure: |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 475 | nla_put_failure: |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 476 | nlmsg_cancel(skb, nlh); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 477 | return -1; |
| 478 | } |
| 479 | |
| 480 | #ifdef CONFIG_NF_CONNTRACK_EVENTS |
Pablo Neira Ayuso | 03b64f5 | 2009-06-02 20:08:27 +0200 | [diff] [blame] | 481 | static inline size_t |
| 482 | ctnetlink_proto_size(const struct nf_conn *ct) |
Holger Eitzenberger | 2732c4e | 2009-03-25 21:50:59 +0100 | [diff] [blame] | 483 | { |
| 484 | struct nf_conntrack_l3proto *l3proto; |
| 485 | struct nf_conntrack_l4proto *l4proto; |
Pablo Neira Ayuso | 03b64f5 | 2009-06-02 20:08:27 +0200 | [diff] [blame] | 486 | size_t len = 0; |
Holger Eitzenberger | 2732c4e | 2009-03-25 21:50:59 +0100 | [diff] [blame] | 487 | |
| 488 | rcu_read_lock(); |
Pablo Neira Ayuso | 03b64f5 | 2009-06-02 20:08:27 +0200 | [diff] [blame] | 489 | l3proto = __nf_ct_l3proto_find(nf_ct_l3num(ct)); |
Holger Eitzenberger | 2732c4e | 2009-03-25 21:50:59 +0100 | [diff] [blame] | 490 | len += l3proto->nla_size; |
| 491 | |
Pablo Neira Ayuso | 03b64f5 | 2009-06-02 20:08:27 +0200 | [diff] [blame] | 492 | l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct)); |
Holger Eitzenberger | 2732c4e | 2009-03-25 21:50:59 +0100 | [diff] [blame] | 493 | len += l4proto->nla_size; |
| 494 | rcu_read_unlock(); |
| 495 | |
Pablo Neira Ayuso | 03b64f5 | 2009-06-02 20:08:27 +0200 | [diff] [blame] | 496 | return len; |
| 497 | } |
| 498 | |
| 499 | static inline size_t |
Jiri Pirko | d26e6a0 | 2010-04-01 12:39:19 +0200 | [diff] [blame] | 500 | ctnetlink_counters_size(const struct nf_conn *ct) |
| 501 | { |
| 502 | if (!nf_ct_ext_exist(ct, NF_CT_EXT_ACCT)) |
| 503 | return 0; |
| 504 | return 2 * nla_total_size(0) /* CTA_COUNTERS_ORIG|REPL */ |
| 505 | + 2 * nla_total_size(sizeof(uint64_t)) /* CTA_COUNTERS_PACKETS */ |
| 506 | + 2 * nla_total_size(sizeof(uint64_t)) /* CTA_COUNTERS_BYTES */ |
| 507 | ; |
| 508 | } |
| 509 | |
Pablo Neira Ayuso | cba85b5 | 2011-01-06 11:25:00 -0800 | [diff] [blame] | 510 | static inline int |
| 511 | ctnetlink_secctx_size(const struct nf_conn *ct) |
Eric Paris | 1cc6324 | 2010-10-13 16:24:54 -0400 | [diff] [blame] | 512 | { |
Pablo Neira Ayuso | cba85b5 | 2011-01-06 11:25:00 -0800 | [diff] [blame] | 513 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
| 514 | int len, ret; |
Eric Paris | 1cc6324 | 2010-10-13 16:24:54 -0400 | [diff] [blame] | 515 | |
Pablo Neira Ayuso | cba85b5 | 2011-01-06 11:25:00 -0800 | [diff] [blame] | 516 | ret = security_secid_to_secctx(ct->secmark, NULL, &len); |
| 517 | if (ret) |
| 518 | return 0; |
Eric Paris | 1cc6324 | 2010-10-13 16:24:54 -0400 | [diff] [blame] | 519 | |
Pablo Neira Ayuso | cba85b5 | 2011-01-06 11:25:00 -0800 | [diff] [blame] | 520 | return nla_total_size(0) /* CTA_SECCTX */ |
| 521 | + nla_total_size(sizeof(char) * len); /* CTA_SECCTX_NAME */ |
| 522 | #else |
| 523 | return 0; |
Eric Paris | 1cc6324 | 2010-10-13 16:24:54 -0400 | [diff] [blame] | 524 | #endif |
Pablo Neira Ayuso | cba85b5 | 2011-01-06 11:25:00 -0800 | [diff] [blame] | 525 | } |
Eric Paris | 1cc6324 | 2010-10-13 16:24:54 -0400 | [diff] [blame] | 526 | |
Jiri Pirko | d26e6a0 | 2010-04-01 12:39:19 +0200 | [diff] [blame] | 527 | static inline size_t |
Pablo Neira Ayuso | a992ca2 | 2011-01-19 16:00:07 +0100 | [diff] [blame] | 528 | ctnetlink_timestamp_size(const struct nf_conn *ct) |
| 529 | { |
| 530 | #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP |
| 531 | if (!nf_ct_ext_exist(ct, NF_CT_EXT_TSTAMP)) |
| 532 | return 0; |
| 533 | return nla_total_size(0) + 2 * nla_total_size(sizeof(uint64_t)); |
| 534 | #else |
| 535 | return 0; |
| 536 | #endif |
| 537 | } |
| 538 | |
| 539 | static inline size_t |
Pablo Neira Ayuso | 03b64f5 | 2009-06-02 20:08:27 +0200 | [diff] [blame] | 540 | ctnetlink_nlmsg_size(const struct nf_conn *ct) |
| 541 | { |
| 542 | return NLMSG_ALIGN(sizeof(struct nfgenmsg)) |
| 543 | + 3 * nla_total_size(0) /* CTA_TUPLE_ORIG|REPL|MASTER */ |
| 544 | + 3 * nla_total_size(0) /* CTA_TUPLE_IP */ |
| 545 | + 3 * nla_total_size(0) /* CTA_TUPLE_PROTO */ |
| 546 | + 3 * nla_total_size(sizeof(u_int8_t)) /* CTA_PROTO_NUM */ |
| 547 | + nla_total_size(sizeof(u_int32_t)) /* CTA_ID */ |
| 548 | + nla_total_size(sizeof(u_int32_t)) /* CTA_STATUS */ |
Jiri Pirko | d26e6a0 | 2010-04-01 12:39:19 +0200 | [diff] [blame] | 549 | + ctnetlink_counters_size(ct) |
Pablo Neira Ayuso | a992ca2 | 2011-01-19 16:00:07 +0100 | [diff] [blame] | 550 | + ctnetlink_timestamp_size(ct) |
Pablo Neira Ayuso | 03b64f5 | 2009-06-02 20:08:27 +0200 | [diff] [blame] | 551 | + nla_total_size(sizeof(u_int32_t)) /* CTA_TIMEOUT */ |
| 552 | + nla_total_size(0) /* CTA_PROTOINFO */ |
| 553 | + nla_total_size(0) /* CTA_HELP */ |
| 554 | + nla_total_size(NF_CT_HELPER_NAME_LEN) /* CTA_HELP_NAME */ |
Pablo Neira Ayuso | cba85b5 | 2011-01-06 11:25:00 -0800 | [diff] [blame] | 555 | + ctnetlink_secctx_size(ct) |
Pablo Neira Ayuso | 03b64f5 | 2009-06-02 20:08:27 +0200 | [diff] [blame] | 556 | #ifdef CONFIG_NF_NAT_NEEDED |
| 557 | + 2 * nla_total_size(0) /* CTA_NAT_SEQ_ADJ_ORIG|REPL */ |
| 558 | + 6 * nla_total_size(sizeof(u_int32_t)) /* CTA_NAT_SEQ_OFFSET */ |
| 559 | #endif |
| 560 | #ifdef CONFIG_NF_CONNTRACK_MARK |
| 561 | + nla_total_size(sizeof(u_int32_t)) /* CTA_MARK */ |
| 562 | #endif |
| 563 | + ctnetlink_proto_size(ct) |
| 564 | ; |
Holger Eitzenberger | 2732c4e | 2009-03-25 21:50:59 +0100 | [diff] [blame] | 565 | } |
| 566 | |
Pablo Neira Ayuso | e34d5c1 | 2009-06-03 10:32:06 +0200 | [diff] [blame] | 567 | static int |
| 568 | ctnetlink_conntrack_event(unsigned int events, struct nf_ct_event *item) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 569 | { |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 570 | struct net *net; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 571 | struct nlmsghdr *nlh; |
| 572 | struct nfgenmsg *nfmsg; |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 573 | struct nlattr *nest_parms; |
Pablo Neira Ayuso | 19abb7b | 2008-11-18 11:56:20 +0100 | [diff] [blame] | 574 | struct nf_conn *ct = item->ct; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 575 | struct sk_buff *skb; |
| 576 | unsigned int type; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 577 | unsigned int flags = 0, group; |
Pablo Neira Ayuso | dd7669a | 2009-06-13 12:30:52 +0200 | [diff] [blame] | 578 | int err; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 579 | |
| 580 | /* ignore our fake conntrack entry */ |
Eric Dumazet | 5bfddbd | 2010-06-08 16:09:52 +0200 | [diff] [blame] | 581 | if (nf_ct_is_untracked(ct)) |
Pablo Neira Ayuso | e34d5c1 | 2009-06-03 10:32:06 +0200 | [diff] [blame] | 582 | return 0; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 583 | |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 584 | if (events & (1 << IPCT_DESTROY)) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 585 | type = IPCTNL_MSG_CT_DELETE; |
| 586 | group = NFNLGRP_CONNTRACK_DESTROY; |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 587 | } else if (events & ((1 << IPCT_NEW) | (1 << IPCT_RELATED))) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 588 | type = IPCTNL_MSG_CT_NEW; |
| 589 | flags = NLM_F_CREATE|NLM_F_EXCL; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 590 | group = NFNLGRP_CONNTRACK_NEW; |
Pablo Neira Ayuso | 17e6e4e | 2009-06-02 20:08:46 +0200 | [diff] [blame] | 591 | } else if (events) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 592 | type = IPCTNL_MSG_CT_NEW; |
| 593 | group = NFNLGRP_CONNTRACK_UPDATE; |
| 594 | } else |
Pablo Neira Ayuso | e34d5c1 | 2009-06-03 10:32:06 +0200 | [diff] [blame] | 595 | return 0; |
Patrick McHardy | a242769 | 2006-03-20 18:03:59 -0800 | [diff] [blame] | 596 | |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 597 | net = nf_ct_net(ct); |
| 598 | if (!item->report && !nfnetlink_has_listeners(net, group)) |
Pablo Neira Ayuso | e34d5c1 | 2009-06-03 10:32:06 +0200 | [diff] [blame] | 599 | return 0; |
Patrick McHardy | a242769 | 2006-03-20 18:03:59 -0800 | [diff] [blame] | 600 | |
Pablo Neira Ayuso | 03b64f5 | 2009-06-02 20:08:27 +0200 | [diff] [blame] | 601 | skb = nlmsg_new(ctnetlink_nlmsg_size(ct), GFP_ATOMIC); |
| 602 | if (skb == NULL) |
Pablo Neira Ayuso | 150ace0 | 2009-04-17 17:47:31 +0200 | [diff] [blame] | 603 | goto errout; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 604 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 605 | type |= NFNL_SUBSYS_CTNETLINK << 8; |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 606 | nlh = nlmsg_put(skb, item->pid, 0, type, sizeof(*nfmsg), flags); |
| 607 | if (nlh == NULL) |
| 608 | goto nlmsg_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 609 | |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 610 | nfmsg = nlmsg_data(nlh); |
Patrick McHardy | 5e8fbe2 | 2008-04-14 11:15:52 +0200 | [diff] [blame] | 611 | nfmsg->nfgen_family = nf_ct_l3num(ct); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 612 | nfmsg->version = NFNETLINK_V0; |
| 613 | nfmsg->res_id = 0; |
| 614 | |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 615 | rcu_read_lock(); |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 616 | nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED); |
| 617 | if (!nest_parms) |
| 618 | goto nla_put_failure; |
Pablo Neira Ayuso | f2f3e38 | 2009-06-02 20:03:35 +0200 | [diff] [blame] | 619 | if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 620 | goto nla_put_failure; |
| 621 | nla_nest_end(skb, nest_parms); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 622 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 623 | nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED); |
| 624 | if (!nest_parms) |
| 625 | goto nla_put_failure; |
Pablo Neira Ayuso | f2f3e38 | 2009-06-02 20:03:35 +0200 | [diff] [blame] | 626 | if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 627 | goto nla_put_failure; |
| 628 | nla_nest_end(skb, nest_parms); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 629 | |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 630 | if (nf_ct_zone(ct) && |
| 631 | nla_put_be16(skb, CTA_ZONE, htons(nf_ct_zone(ct)))) |
| 632 | goto nla_put_failure; |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 633 | |
Eric Leblond | 1eedf69 | 2008-05-13 23:27:11 -0700 | [diff] [blame] | 634 | if (ctnetlink_dump_id(skb, ct) < 0) |
| 635 | goto nla_put_failure; |
| 636 | |
Fabian Hugelshofer | e57dce6 | 2008-06-09 15:59:58 -0700 | [diff] [blame] | 637 | if (ctnetlink_dump_status(skb, ct) < 0) |
| 638 | goto nla_put_failure; |
| 639 | |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 640 | if (events & (1 << IPCT_DESTROY)) { |
Pablo Neira Ayuso | 80e60e6 | 2011-12-24 14:11:39 +0100 | [diff] [blame] | 641 | if (ctnetlink_dump_counters(skb, ct, |
| 642 | IP_CT_DIR_ORIGINAL, type) < 0 || |
| 643 | ctnetlink_dump_counters(skb, ct, |
| 644 | IP_CT_DIR_REPLY, type) < 0 || |
Pablo Neira Ayuso | a992ca2 | 2011-01-19 16:00:07 +0100 | [diff] [blame] | 645 | ctnetlink_dump_timestamp(skb, ct) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 646 | goto nla_put_failure; |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 647 | } else { |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 648 | if (ctnetlink_dump_timeout(skb, ct) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 649 | goto nla_put_failure; |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 650 | |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 651 | if (events & (1 << IPCT_PROTOINFO) |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 652 | && ctnetlink_dump_protoinfo(skb, ct) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 653 | goto nla_put_failure; |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 654 | |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 655 | if ((events & (1 << IPCT_HELPER) || nfct_help(ct)) |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 656 | && ctnetlink_dump_helpinfo(skb, ct) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 657 | goto nla_put_failure; |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 658 | |
Eric Paris | ff660c8 | 2010-10-19 18:17:32 -0400 | [diff] [blame] | 659 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 660 | if ((events & (1 << IPCT_SECMARK) || ct->secmark) |
Eric Paris | 1cc6324 | 2010-10-13 16:24:54 -0400 | [diff] [blame] | 661 | && ctnetlink_dump_secctx(skb, ct) < 0) |
Pablo Neira Ayuso | 37fccd8 | 2007-12-17 22:28:41 -0800 | [diff] [blame] | 662 | goto nla_put_failure; |
Eric Paris | ff660c8 | 2010-10-19 18:17:32 -0400 | [diff] [blame] | 663 | #endif |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 664 | |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 665 | if (events & (1 << IPCT_RELATED) && |
Pablo Neira Ayuso | 0f417ce | 2007-12-17 22:28:19 -0800 | [diff] [blame] | 666 | ctnetlink_dump_master(skb, ct) < 0) |
| 667 | goto nla_put_failure; |
| 668 | |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 669 | if (events & (1 << IPCT_NATSEQADJ) && |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 670 | ctnetlink_dump_nat_seq_adj(skb, ct) < 0) |
| 671 | goto nla_put_failure; |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 672 | } |
Pablo Neira Ayuso | b9a37e0 | 2006-08-22 00:31:49 -0700 | [diff] [blame] | 673 | |
Eric Leblond | a83099a | 2008-01-31 04:44:27 -0800 | [diff] [blame] | 674 | #ifdef CONFIG_NF_CONNTRACK_MARK |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 675 | if ((events & (1 << IPCT_MARK) || ct->mark) |
Eric Leblond | a83099a | 2008-01-31 04:44:27 -0800 | [diff] [blame] | 676 | && ctnetlink_dump_mark(skb, ct) < 0) |
| 677 | goto nla_put_failure; |
| 678 | #endif |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 679 | rcu_read_unlock(); |
Eric Leblond | a83099a | 2008-01-31 04:44:27 -0800 | [diff] [blame] | 680 | |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 681 | nlmsg_end(skb, nlh); |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 682 | err = nfnetlink_send(skb, net, item->pid, group, item->report, |
Alexey Dobriyan | cd8c20b | 2010-01-13 16:02:14 +0100 | [diff] [blame] | 683 | GFP_ATOMIC); |
Pablo Neira Ayuso | dd7669a | 2009-06-13 12:30:52 +0200 | [diff] [blame] | 684 | if (err == -ENOBUFS || err == -EAGAIN) |
| 685 | return -ENOBUFS; |
| 686 | |
Pablo Neira Ayuso | e34d5c1 | 2009-06-03 10:32:06 +0200 | [diff] [blame] | 687 | return 0; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 688 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 689 | nla_put_failure: |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 690 | rcu_read_unlock(); |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 691 | nlmsg_cancel(skb, nlh); |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 692 | nlmsg_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 693 | kfree_skb(skb); |
Pablo Neira Ayuso | 150ace0 | 2009-04-17 17:47:31 +0200 | [diff] [blame] | 694 | errout: |
Pablo Neira Ayuso | 37b7ef7 | 2010-03-16 13:30:21 +0000 | [diff] [blame] | 695 | if (nfnetlink_set_err(net, 0, group, -ENOBUFS) > 0) |
| 696 | return -ENOBUFS; |
| 697 | |
Pablo Neira Ayuso | e34d5c1 | 2009-06-03 10:32:06 +0200 | [diff] [blame] | 698 | return 0; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 699 | } |
| 700 | #endif /* CONFIG_NF_CONNTRACK_EVENTS */ |
| 701 | |
| 702 | static int ctnetlink_done(struct netlink_callback *cb) |
| 703 | { |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 704 | if (cb->args[1]) |
| 705 | nf_ct_put((struct nf_conn *)cb->args[1]); |
Pablo Neira Ayuso | 0f298a2 | 2012-02-24 14:41:50 +0000 | [diff] [blame] | 706 | if (cb->data) |
| 707 | kfree(cb->data); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 708 | return 0; |
| 709 | } |
| 710 | |
Pablo Neira Ayuso | 0f298a2 | 2012-02-24 14:41:50 +0000 | [diff] [blame] | 711 | struct ctnetlink_dump_filter { |
| 712 | struct { |
| 713 | u_int32_t val; |
| 714 | u_int32_t mask; |
| 715 | } mark; |
| 716 | }; |
| 717 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 718 | static int |
| 719 | ctnetlink_dump_table(struct sk_buff *skb, struct netlink_callback *cb) |
| 720 | { |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 721 | struct net *net = sock_net(skb->sk); |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 722 | struct nf_conn *ct, *last; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 723 | struct nf_conntrack_tuple_hash *h; |
Eric Dumazet | ea781f1 | 2009-03-25 21:05:46 +0100 | [diff] [blame] | 724 | struct hlist_nulls_node *n; |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 725 | struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh); |
Pablo Neira Ayuso | 87711cb | 2006-01-05 12:19:23 -0800 | [diff] [blame] | 726 | u_int8_t l3proto = nfmsg->nfgen_family; |
Hans Schillstrom | 3b988ec | 2012-03-05 02:24:29 +0000 | [diff] [blame] | 727 | int res; |
Pablo Neira Ayuso | 0f298a2 | 2012-02-24 14:41:50 +0000 | [diff] [blame] | 728 | #ifdef CONFIG_NF_CONNTRACK_MARK |
| 729 | const struct ctnetlink_dump_filter *filter = cb->data; |
| 730 | #endif |
Hans Schillstrom | 3b988ec | 2012-03-05 02:24:29 +0000 | [diff] [blame] | 731 | |
Stephen Hemminger | 13ee6ac | 2011-01-11 23:54:42 +0100 | [diff] [blame] | 732 | spin_lock_bh(&nf_conntrack_lock); |
Patrick McHardy | d205dc4 | 2006-08-17 18:12:38 -0700 | [diff] [blame] | 733 | last = (struct nf_conn *)cb->args[1]; |
Patrick McHardy | 9ab99d5 | 2010-02-10 14:17:10 +0100 | [diff] [blame] | 734 | for (; cb->args[0] < net->ct.htable_size; cb->args[0]++) { |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 735 | restart: |
Stephen Hemminger | 13ee6ac | 2011-01-11 23:54:42 +0100 | [diff] [blame] | 736 | hlist_nulls_for_each_entry(h, n, &net->ct.hash[cb->args[0]], |
Eric Dumazet | ea781f1 | 2009-03-25 21:05:46 +0100 | [diff] [blame] | 737 | hnnode) { |
Jozsef Kadlecsik | 5b1158e | 2006-12-02 22:07:13 -0800 | [diff] [blame] | 738 | if (NF_CT_DIRECTION(h) != IP_CT_DIR_ORIGINAL) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 739 | continue; |
| 740 | ct = nf_ct_tuplehash_to_ctrack(h); |
Pablo Neira Ayuso | 87711cb | 2006-01-05 12:19:23 -0800 | [diff] [blame] | 741 | /* Dump entries of a given L3 protocol number. |
| 742 | * If it is not specified, ie. l3proto == 0, |
| 743 | * then dump everything. */ |
Patrick McHardy | 5e8fbe2 | 2008-04-14 11:15:52 +0200 | [diff] [blame] | 744 | if (l3proto && nf_ct_l3num(ct) != l3proto) |
Stephen Hemminger | 13ee6ac | 2011-01-11 23:54:42 +0100 | [diff] [blame] | 745 | continue; |
Patrick McHardy | d205dc4 | 2006-08-17 18:12:38 -0700 | [diff] [blame] | 746 | if (cb->args[1]) { |
| 747 | if (ct != last) |
Stephen Hemminger | 13ee6ac | 2011-01-11 23:54:42 +0100 | [diff] [blame] | 748 | continue; |
Patrick McHardy | d205dc4 | 2006-08-17 18:12:38 -0700 | [diff] [blame] | 749 | cb->args[1] = 0; |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 750 | } |
Pablo Neira Ayuso | 0f298a2 | 2012-02-24 14:41:50 +0000 | [diff] [blame] | 751 | #ifdef CONFIG_NF_CONNTRACK_MARK |
| 752 | if (filter && !((ct->mark & filter->mark.mask) == |
| 753 | filter->mark.val)) { |
| 754 | continue; |
| 755 | } |
| 756 | #endif |
Hans Schillstrom | 3b988ec | 2012-03-05 02:24:29 +0000 | [diff] [blame] | 757 | rcu_read_lock(); |
| 758 | res = |
| 759 | ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).pid, |
| 760 | cb->nlh->nlmsg_seq, |
| 761 | NFNL_MSG_TYPE(cb->nlh->nlmsg_type), |
| 762 | ct); |
| 763 | rcu_read_unlock(); |
| 764 | if (res < 0) { |
Pablo Neira Ayuso | c71caf4 | 2011-01-24 19:01:07 +0100 | [diff] [blame] | 765 | nf_conntrack_get(&ct->ct_general); |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 766 | cb->args[1] = (unsigned long)ct; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 767 | goto out; |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 768 | } |
| 769 | } |
Patrick McHardy | d205dc4 | 2006-08-17 18:12:38 -0700 | [diff] [blame] | 770 | if (cb->args[1]) { |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 771 | cb->args[1] = 0; |
| 772 | goto restart; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 773 | } |
| 774 | } |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 775 | out: |
Stephen Hemminger | 13ee6ac | 2011-01-11 23:54:42 +0100 | [diff] [blame] | 776 | spin_unlock_bh(&nf_conntrack_lock); |
Patrick McHardy | d205dc4 | 2006-08-17 18:12:38 -0700 | [diff] [blame] | 777 | if (last) |
| 778 | nf_ct_put(last); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 779 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 780 | return skb->len; |
| 781 | } |
| 782 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 783 | static inline int |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 784 | 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] | 785 | { |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 786 | struct nlattr *tb[CTA_IP_MAX+1]; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 787 | struct nf_conntrack_l3proto *l3proto; |
| 788 | int ret = 0; |
| 789 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 790 | nla_parse_nested(tb, CTA_IP_MAX, attr, NULL); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 791 | |
Florian Westphal | cd91566 | 2009-03-18 17:28:37 +0100 | [diff] [blame] | 792 | rcu_read_lock(); |
| 793 | l3proto = __nf_ct_l3proto_find(tuple->src.l3num); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 794 | |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 795 | if (likely(l3proto->nlattr_to_tuple)) { |
| 796 | ret = nla_validate_nested(attr, CTA_IP_MAX, |
| 797 | l3proto->nla_policy); |
| 798 | if (ret == 0) |
| 799 | ret = l3proto->nlattr_to_tuple(tb, tuple); |
| 800 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 801 | |
Florian Westphal | cd91566 | 2009-03-18 17:28:37 +0100 | [diff] [blame] | 802 | rcu_read_unlock(); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 803 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 804 | return ret; |
| 805 | } |
| 806 | |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 807 | static const struct nla_policy proto_nla_policy[CTA_PROTO_MAX+1] = { |
| 808 | [CTA_PROTO_NUM] = { .type = NLA_U8 }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 809 | }; |
| 810 | |
| 811 | static inline int |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 812 | ctnetlink_parse_tuple_proto(struct nlattr *attr, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 813 | struct nf_conntrack_tuple *tuple) |
| 814 | { |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 815 | struct nlattr *tb[CTA_PROTO_MAX+1]; |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 816 | struct nf_conntrack_l4proto *l4proto; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 817 | int ret = 0; |
| 818 | |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 819 | ret = nla_parse_nested(tb, CTA_PROTO_MAX, attr, proto_nla_policy); |
| 820 | if (ret < 0) |
| 821 | return ret; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 822 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 823 | if (!tb[CTA_PROTO_NUM]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 824 | return -EINVAL; |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 825 | tuple->dst.protonum = nla_get_u8(tb[CTA_PROTO_NUM]); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 826 | |
Florian Westphal | cd91566 | 2009-03-18 17:28:37 +0100 | [diff] [blame] | 827 | rcu_read_lock(); |
| 828 | l4proto = __nf_ct_l4proto_find(tuple->src.l3num, tuple->dst.protonum); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 829 | |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 830 | if (likely(l4proto->nlattr_to_tuple)) { |
| 831 | ret = nla_validate_nested(attr, CTA_PROTO_MAX, |
| 832 | l4proto->nla_policy); |
| 833 | if (ret == 0) |
| 834 | ret = l4proto->nlattr_to_tuple(tb, tuple); |
| 835 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 836 | |
Florian Westphal | cd91566 | 2009-03-18 17:28:37 +0100 | [diff] [blame] | 837 | rcu_read_unlock(); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 838 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 839 | return ret; |
| 840 | } |
| 841 | |
Patrick McHardy | d0b0268 | 2010-02-10 15:38:33 +0100 | [diff] [blame] | 842 | static const struct nla_policy tuple_nla_policy[CTA_TUPLE_MAX+1] = { |
| 843 | [CTA_TUPLE_IP] = { .type = NLA_NESTED }, |
| 844 | [CTA_TUPLE_PROTO] = { .type = NLA_NESTED }, |
| 845 | }; |
| 846 | |
Ilpo Järvinen | bb5cf80 | 2008-01-05 23:11:31 -0800 | [diff] [blame] | 847 | static int |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 848 | ctnetlink_parse_tuple(const struct nlattr * const cda[], |
| 849 | struct nf_conntrack_tuple *tuple, |
Patrick McHardy | a00f1f3 | 2011-02-01 17:26:37 +0100 | [diff] [blame] | 850 | enum ctattr_type type, u_int8_t l3num) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 851 | { |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 852 | struct nlattr *tb[CTA_TUPLE_MAX+1]; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 853 | int err; |
| 854 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 855 | memset(tuple, 0, sizeof(*tuple)); |
| 856 | |
Patrick McHardy | d0b0268 | 2010-02-10 15:38:33 +0100 | [diff] [blame] | 857 | nla_parse_nested(tb, CTA_TUPLE_MAX, cda[type], tuple_nla_policy); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 858 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 859 | if (!tb[CTA_TUPLE_IP]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 860 | return -EINVAL; |
| 861 | |
| 862 | tuple->src.l3num = l3num; |
| 863 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 864 | err = ctnetlink_parse_tuple_ip(tb[CTA_TUPLE_IP], tuple); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 865 | if (err < 0) |
| 866 | return err; |
| 867 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 868 | if (!tb[CTA_TUPLE_PROTO]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 869 | return -EINVAL; |
| 870 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 871 | err = ctnetlink_parse_tuple_proto(tb[CTA_TUPLE_PROTO], tuple); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 872 | if (err < 0) |
| 873 | return err; |
| 874 | |
| 875 | /* orig and expect tuples get DIR_ORIGINAL */ |
| 876 | if (type == CTA_TUPLE_REPLY) |
| 877 | tuple->dst.dir = IP_CT_DIR_REPLY; |
| 878 | else |
| 879 | tuple->dst.dir = IP_CT_DIR_ORIGINAL; |
| 880 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 881 | return 0; |
| 882 | } |
| 883 | |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 884 | static int |
| 885 | ctnetlink_parse_zone(const struct nlattr *attr, u16 *zone) |
| 886 | { |
| 887 | if (attr) |
| 888 | #ifdef CONFIG_NF_CONNTRACK_ZONES |
| 889 | *zone = ntohs(nla_get_be16(attr)); |
| 890 | #else |
| 891 | return -EOPNOTSUPP; |
| 892 | #endif |
| 893 | else |
| 894 | *zone = 0; |
| 895 | |
| 896 | return 0; |
| 897 | } |
| 898 | |
Patrick McHardy | d0b0268 | 2010-02-10 15:38:33 +0100 | [diff] [blame] | 899 | static const struct nla_policy help_nla_policy[CTA_HELP_MAX+1] = { |
| 900 | [CTA_HELP_NAME] = { .type = NLA_NUL_STRING }, |
| 901 | }; |
| 902 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 903 | static inline int |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 904 | ctnetlink_parse_help(const struct nlattr *attr, char **helper_name) |
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 | struct nlattr *tb[CTA_HELP_MAX+1]; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 907 | |
Patrick McHardy | d0b0268 | 2010-02-10 15:38:33 +0100 | [diff] [blame] | 908 | nla_parse_nested(tb, CTA_HELP_MAX, attr, help_nla_policy); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 909 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 910 | if (!tb[CTA_HELP_NAME]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 911 | return -EINVAL; |
| 912 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 913 | *helper_name = nla_data(tb[CTA_HELP_NAME]); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 914 | |
| 915 | return 0; |
| 916 | } |
| 917 | |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 918 | static const struct nla_policy ct_nla_policy[CTA_MAX+1] = { |
Patrick McHardy | d0b0268 | 2010-02-10 15:38:33 +0100 | [diff] [blame] | 919 | [CTA_TUPLE_ORIG] = { .type = NLA_NESTED }, |
| 920 | [CTA_TUPLE_REPLY] = { .type = NLA_NESTED }, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 921 | [CTA_STATUS] = { .type = NLA_U32 }, |
Patrick McHardy | d0b0268 | 2010-02-10 15:38:33 +0100 | [diff] [blame] | 922 | [CTA_PROTOINFO] = { .type = NLA_NESTED }, |
| 923 | [CTA_HELP] = { .type = NLA_NESTED }, |
| 924 | [CTA_NAT_SRC] = { .type = NLA_NESTED }, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 925 | [CTA_TIMEOUT] = { .type = NLA_U32 }, |
| 926 | [CTA_MARK] = { .type = NLA_U32 }, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 927 | [CTA_ID] = { .type = NLA_U32 }, |
Patrick McHardy | d0b0268 | 2010-02-10 15:38:33 +0100 | [diff] [blame] | 928 | [CTA_NAT_DST] = { .type = NLA_NESTED }, |
| 929 | [CTA_TUPLE_MASTER] = { .type = NLA_NESTED }, |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 930 | [CTA_ZONE] = { .type = NLA_U16 }, |
Pablo Neira Ayuso | 0f298a2 | 2012-02-24 14:41:50 +0000 | [diff] [blame] | 931 | [CTA_MARK_MASK] = { .type = NLA_U32 }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 932 | }; |
| 933 | |
| 934 | static int |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 935 | ctnetlink_del_conntrack(struct sock *ctnl, struct sk_buff *skb, |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 936 | const struct nlmsghdr *nlh, |
| 937 | const struct nlattr * const cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 938 | { |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 939 | struct net *net = sock_net(ctnl); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 940 | struct nf_conntrack_tuple_hash *h; |
| 941 | struct nf_conntrack_tuple tuple; |
| 942 | struct nf_conn *ct; |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 943 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 944 | u_int8_t u3 = nfmsg->nfgen_family; |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 945 | u16 zone; |
| 946 | int err; |
| 947 | |
| 948 | err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone); |
| 949 | if (err < 0) |
| 950 | return err; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 951 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 952 | if (cda[CTA_TUPLE_ORIG]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 953 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, u3); |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 954 | else if (cda[CTA_TUPLE_REPLY]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 955 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, u3); |
| 956 | else { |
| 957 | /* Flush the whole table */ |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 958 | nf_conntrack_flush_report(net, |
Pablo Neira Ayuso | 274d383 | 2009-06-02 20:08:38 +0200 | [diff] [blame] | 959 | NETLINK_CB(skb).pid, |
| 960 | nlmsg_report(nlh)); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 961 | return 0; |
| 962 | } |
| 963 | |
| 964 | if (err < 0) |
| 965 | return err; |
| 966 | |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 967 | h = nf_conntrack_find_get(net, zone, &tuple); |
Pablo Neira Ayuso | 9ea8cfd | 2006-10-12 14:09:16 -0700 | [diff] [blame] | 968 | if (!h) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 969 | return -ENOENT; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 970 | |
| 971 | ct = nf_ct_tuplehash_to_ctrack(h); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 972 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 973 | if (cda[CTA_ID]) { |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 974 | u_int32_t id = ntohl(nla_get_be32(cda[CTA_ID])); |
Patrick McHardy | 7f85f91 | 2007-09-28 14:41:27 -0700 | [diff] [blame] | 975 | if (id != (u32)(unsigned long)ct) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 976 | nf_ct_put(ct); |
| 977 | return -ENOENT; |
| 978 | } |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 979 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 980 | |
Pablo Neira Ayuso | a16a164 | 2012-03-16 02:00:34 +0000 | [diff] [blame] | 981 | if (del_timer(&ct->timeout)) { |
| 982 | if (nf_conntrack_event_report(IPCT_DESTROY, ct, |
| 983 | NETLINK_CB(skb).pid, |
| 984 | nlmsg_report(nlh)) < 0) { |
| 985 | nf_ct_delete_from_lists(ct); |
| 986 | /* we failed to report the event, try later */ |
| 987 | nf_ct_insert_dying_list(ct); |
| 988 | nf_ct_put(ct); |
| 989 | return 0; |
| 990 | } |
| 991 | /* death_by_timeout would report the event again */ |
| 992 | set_bit(IPS_DYING_BIT, &ct->status); |
Pablo Neira Ayuso | dd7669a | 2009-06-13 12:30:52 +0200 | [diff] [blame] | 993 | nf_ct_delete_from_lists(ct); |
Pablo Neira Ayuso | dd7669a | 2009-06-13 12:30:52 +0200 | [diff] [blame] | 994 | nf_ct_put(ct); |
Pablo Neira Ayuso | dd7669a | 2009-06-13 12:30:52 +0200 | [diff] [blame] | 995 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 996 | nf_ct_put(ct); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 997 | |
| 998 | return 0; |
| 999 | } |
| 1000 | |
| 1001 | static int |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1002 | ctnetlink_get_conntrack(struct sock *ctnl, struct sk_buff *skb, |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 1003 | const struct nlmsghdr *nlh, |
| 1004 | const struct nlattr * const cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1005 | { |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 1006 | struct net *net = sock_net(ctnl); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1007 | struct nf_conntrack_tuple_hash *h; |
| 1008 | struct nf_conntrack_tuple tuple; |
| 1009 | struct nf_conn *ct; |
| 1010 | struct sk_buff *skb2 = NULL; |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 1011 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1012 | u_int8_t u3 = nfmsg->nfgen_family; |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 1013 | u16 zone; |
| 1014 | int err; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1015 | |
Pablo Neira Ayuso | 80d326f | 2012-02-24 14:30:15 +0000 | [diff] [blame] | 1016 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
| 1017 | struct netlink_dump_control c = { |
| 1018 | .dump = ctnetlink_dump_table, |
| 1019 | .done = ctnetlink_done, |
| 1020 | }; |
Pablo Neira Ayuso | 0f298a2 | 2012-02-24 14:41:50 +0000 | [diff] [blame] | 1021 | #ifdef CONFIG_NF_CONNTRACK_MARK |
| 1022 | if (cda[CTA_MARK] && cda[CTA_MARK_MASK]) { |
| 1023 | struct ctnetlink_dump_filter *filter; |
| 1024 | |
| 1025 | filter = kzalloc(sizeof(struct ctnetlink_dump_filter), |
| 1026 | GFP_ATOMIC); |
| 1027 | if (filter == NULL) |
| 1028 | return -ENOMEM; |
| 1029 | |
| 1030 | filter->mark.val = ntohl(nla_get_be32(cda[CTA_MARK])); |
| 1031 | filter->mark.mask = |
| 1032 | ntohl(nla_get_be32(cda[CTA_MARK_MASK])); |
| 1033 | c.data = filter; |
| 1034 | } |
| 1035 | #endif |
Pablo Neira Ayuso | 80d326f | 2012-02-24 14:30:15 +0000 | [diff] [blame] | 1036 | return netlink_dump_start(ctnl, skb, nlh, &c); |
| 1037 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1038 | |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 1039 | err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone); |
| 1040 | if (err < 0) |
| 1041 | return err; |
| 1042 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1043 | if (cda[CTA_TUPLE_ORIG]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1044 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, u3); |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1045 | else if (cda[CTA_TUPLE_REPLY]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1046 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, u3); |
| 1047 | else |
| 1048 | return -EINVAL; |
| 1049 | |
| 1050 | if (err < 0) |
| 1051 | return err; |
| 1052 | |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 1053 | h = nf_conntrack_find_get(net, zone, &tuple); |
Pablo Neira Ayuso | 9ea8cfd | 2006-10-12 14:09:16 -0700 | [diff] [blame] | 1054 | if (!h) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1055 | return -ENOENT; |
Pablo Neira Ayuso | 9ea8cfd | 2006-10-12 14:09:16 -0700 | [diff] [blame] | 1056 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1057 | ct = nf_ct_tuplehash_to_ctrack(h); |
| 1058 | |
| 1059 | err = -ENOMEM; |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 1060 | skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
| 1061 | if (skb2 == NULL) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1062 | nf_ct_put(ct); |
| 1063 | return -ENOMEM; |
| 1064 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1065 | |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 1066 | rcu_read_lock(); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1067 | err = ctnetlink_fill_info(skb2, NETLINK_CB(skb).pid, nlh->nlmsg_seq, |
Pablo Neira Ayuso | 80e60e6 | 2011-12-24 14:11:39 +0100 | [diff] [blame] | 1068 | NFNL_MSG_TYPE(nlh->nlmsg_type), ct); |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 1069 | rcu_read_unlock(); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1070 | nf_ct_put(ct); |
| 1071 | if (err <= 0) |
| 1072 | goto free; |
| 1073 | |
| 1074 | err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).pid, MSG_DONTWAIT); |
| 1075 | if (err < 0) |
| 1076 | goto out; |
| 1077 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1078 | return 0; |
| 1079 | |
| 1080 | free: |
| 1081 | kfree_skb(skb2); |
| 1082 | out: |
Pablo Neira Ayuso | f31e8d49 | 2011-01-13 14:19:55 +0100 | [diff] [blame] | 1083 | /* this avoids a loop in nfnetlink. */ |
| 1084 | return err == -EAGAIN ? -ENOBUFS : err; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1085 | } |
| 1086 | |
Pablo Neira Ayuso | 6767184 | 2008-10-20 03:34:27 -0700 | [diff] [blame] | 1087 | #ifdef CONFIG_NF_NAT_NEEDED |
Ilpo Järvinen | bb5cf80 | 2008-01-05 23:11:31 -0800 | [diff] [blame] | 1088 | static int |
Pablo Neira Ayuso | e6a7d3c | 2008-10-14 11:58:31 -0700 | [diff] [blame] | 1089 | ctnetlink_parse_nat_setup(struct nf_conn *ct, |
| 1090 | enum nf_nat_manip_type manip, |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 1091 | const struct nlattr *attr) |
Pablo Neira Ayuso | e6a7d3c | 2008-10-14 11:58:31 -0700 | [diff] [blame] | 1092 | { |
| 1093 | typeof(nfnetlink_parse_nat_setup_hook) parse_nat_setup; |
| 1094 | |
| 1095 | parse_nat_setup = rcu_dereference(nfnetlink_parse_nat_setup_hook); |
| 1096 | if (!parse_nat_setup) { |
Johannes Berg | 95a5afc | 2008-10-16 15:24:51 -0700 | [diff] [blame] | 1097 | #ifdef CONFIG_MODULES |
Pablo Neira Ayuso | e6a7d3c | 2008-10-14 11:58:31 -0700 | [diff] [blame] | 1098 | rcu_read_unlock(); |
| 1099 | nfnl_unlock(); |
| 1100 | if (request_module("nf-nat-ipv4") < 0) { |
| 1101 | nfnl_lock(); |
| 1102 | rcu_read_lock(); |
| 1103 | return -EOPNOTSUPP; |
| 1104 | } |
| 1105 | nfnl_lock(); |
| 1106 | rcu_read_lock(); |
| 1107 | if (nfnetlink_parse_nat_setup_hook) |
| 1108 | return -EAGAIN; |
| 1109 | #endif |
| 1110 | return -EOPNOTSUPP; |
| 1111 | } |
| 1112 | |
| 1113 | return parse_nat_setup(ct, manip, attr); |
| 1114 | } |
Pablo Neira Ayuso | 6767184 | 2008-10-20 03:34:27 -0700 | [diff] [blame] | 1115 | #endif |
Pablo Neira Ayuso | e6a7d3c | 2008-10-14 11:58:31 -0700 | [diff] [blame] | 1116 | |
| 1117 | static int |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 1118 | ctnetlink_change_status(struct nf_conn *ct, const struct nlattr * const cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1119 | { |
| 1120 | unsigned long d; |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 1121 | unsigned int status = ntohl(nla_get_be32(cda[CTA_STATUS])); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1122 | d = ct->status ^ status; |
| 1123 | |
| 1124 | if (d & (IPS_EXPECTED|IPS_CONFIRMED|IPS_DYING)) |
| 1125 | /* unchangeable */ |
Pablo Neira Ayuso | 0adf9d6 | 2008-06-09 15:56:20 -0700 | [diff] [blame] | 1126 | return -EBUSY; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1127 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1128 | if (d & IPS_SEEN_REPLY && !(status & IPS_SEEN_REPLY)) |
| 1129 | /* SEEN_REPLY bit can only be set */ |
Pablo Neira Ayuso | 0adf9d6 | 2008-06-09 15:56:20 -0700 | [diff] [blame] | 1130 | return -EBUSY; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1131 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1132 | if (d & IPS_ASSURED && !(status & IPS_ASSURED)) |
| 1133 | /* ASSURED bit can only be set */ |
Pablo Neira Ayuso | 0adf9d6 | 2008-06-09 15:56:20 -0700 | [diff] [blame] | 1134 | return -EBUSY; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1135 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1136 | /* Be careful here, modifying NAT bits can screw up things, |
| 1137 | * 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] | 1138 | * nf_nat_range. */ |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1139 | ct->status |= status & ~(IPS_NAT_DONE_MASK | IPS_NAT_MASK); |
| 1140 | return 0; |
| 1141 | } |
| 1142 | |
Pablo Neira Ayuso | e6a7d3c | 2008-10-14 11:58:31 -0700 | [diff] [blame] | 1143 | static int |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 1144 | ctnetlink_change_nat(struct nf_conn *ct, const struct nlattr * const cda[]) |
Pablo Neira Ayuso | e6a7d3c | 2008-10-14 11:58:31 -0700 | [diff] [blame] | 1145 | { |
| 1146 | #ifdef CONFIG_NF_NAT_NEEDED |
| 1147 | int ret; |
| 1148 | |
| 1149 | if (cda[CTA_NAT_DST]) { |
| 1150 | ret = ctnetlink_parse_nat_setup(ct, |
Patrick McHardy | cbc9f2f | 2011-12-23 13:59:49 +0100 | [diff] [blame] | 1151 | NF_NAT_MANIP_DST, |
Pablo Neira Ayuso | e6a7d3c | 2008-10-14 11:58:31 -0700 | [diff] [blame] | 1152 | cda[CTA_NAT_DST]); |
| 1153 | if (ret < 0) |
| 1154 | return ret; |
| 1155 | } |
| 1156 | if (cda[CTA_NAT_SRC]) { |
| 1157 | ret = ctnetlink_parse_nat_setup(ct, |
Patrick McHardy | cbc9f2f | 2011-12-23 13:59:49 +0100 | [diff] [blame] | 1158 | NF_NAT_MANIP_SRC, |
Pablo Neira Ayuso | e6a7d3c | 2008-10-14 11:58:31 -0700 | [diff] [blame] | 1159 | cda[CTA_NAT_SRC]); |
| 1160 | if (ret < 0) |
| 1161 | return ret; |
| 1162 | } |
| 1163 | return 0; |
| 1164 | #else |
| 1165 | return -EOPNOTSUPP; |
| 1166 | #endif |
| 1167 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1168 | |
| 1169 | static inline int |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 1170 | ctnetlink_change_helper(struct nf_conn *ct, const struct nlattr * const cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1171 | { |
| 1172 | struct nf_conntrack_helper *helper; |
Harald Welte | dc808fe | 2006-03-20 17:56:32 -0800 | [diff] [blame] | 1173 | struct nf_conn_help *help = nfct_help(ct); |
Pablo Neira Ayuso | 29fe1b4 | 2009-04-22 02:26:37 -0700 | [diff] [blame] | 1174 | char *helpname = NULL; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1175 | int err; |
| 1176 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1177 | /* don't change helper of sibling connections */ |
| 1178 | if (ct->master) |
Pablo Neira Ayuso | 0adf9d6 | 2008-06-09 15:56:20 -0700 | [diff] [blame] | 1179 | return -EBUSY; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1180 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1181 | err = ctnetlink_parse_help(cda[CTA_HELP], &helpname); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1182 | if (err < 0) |
| 1183 | return err; |
| 1184 | |
Yasuyuki Kozakai | df293bb | 2007-05-10 14:15:58 -0700 | [diff] [blame] | 1185 | if (!strcmp(helpname, "")) { |
| 1186 | if (help && help->helper) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1187 | /* we had a helper before ... */ |
| 1188 | nf_ct_remove_expectations(ct); |
Stephen Hemminger | a9b3cd7 | 2011-08-01 16:19:00 +0000 | [diff] [blame] | 1189 | RCU_INIT_POINTER(help->helper, NULL); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1190 | } |
Yasuyuki Kozakai | df293bb | 2007-05-10 14:15:58 -0700 | [diff] [blame] | 1191 | |
| 1192 | return 0; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1193 | } |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1194 | |
Patrick McHardy | 794e687 | 2010-02-03 13:41:29 +0100 | [diff] [blame] | 1195 | helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct), |
| 1196 | nf_ct_protonum(ct)); |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1197 | if (helper == NULL) { |
| 1198 | #ifdef CONFIG_MODULES |
| 1199 | spin_unlock_bh(&nf_conntrack_lock); |
| 1200 | |
| 1201 | if (request_module("nfct-helper-%s", helpname) < 0) { |
| 1202 | spin_lock_bh(&nf_conntrack_lock); |
| 1203 | return -EOPNOTSUPP; |
| 1204 | } |
| 1205 | |
| 1206 | spin_lock_bh(&nf_conntrack_lock); |
Patrick McHardy | 794e687 | 2010-02-03 13:41:29 +0100 | [diff] [blame] | 1207 | helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct), |
| 1208 | nf_ct_protonum(ct)); |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1209 | if (helper) |
| 1210 | return -EAGAIN; |
| 1211 | #endif |
Pablo Neira Ayuso | 0adf9d6 | 2008-06-09 15:56:20 -0700 | [diff] [blame] | 1212 | return -EOPNOTSUPP; |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1213 | } |
Yasuyuki Kozakai | df293bb | 2007-05-10 14:15:58 -0700 | [diff] [blame] | 1214 | |
Yasuyuki Kozakai | ceceae1 | 2007-07-07 22:23:42 -0700 | [diff] [blame] | 1215 | if (help) { |
| 1216 | if (help->helper == helper) |
| 1217 | return 0; |
| 1218 | if (help->helper) |
| 1219 | return -EBUSY; |
| 1220 | /* need to zero data of old helper */ |
Pablo Neira Ayuso | 1afc567 | 2012-06-07 12:11:50 +0200 | [diff] [blame] | 1221 | memset(help->data, 0, help->helper->data_len); |
Yasuyuki Kozakai | ceceae1 | 2007-07-07 22:23:42 -0700 | [diff] [blame] | 1222 | } else { |
Pablo Neira Ayuso | a88e22a | 2010-02-19 14:24:39 +0100 | [diff] [blame] | 1223 | /* we cannot set a helper for an existing conntrack */ |
| 1224 | return -EOPNOTSUPP; |
Yasuyuki Kozakai | ceceae1 | 2007-07-07 22:23:42 -0700 | [diff] [blame] | 1225 | } |
Yasuyuki Kozakai | df293bb | 2007-05-10 14:15:58 -0700 | [diff] [blame] | 1226 | |
Eric Dumazet | cf778b0 | 2012-01-12 04:41:32 +0000 | [diff] [blame] | 1227 | rcu_assign_pointer(help->helper, helper); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1228 | |
| 1229 | return 0; |
| 1230 | } |
| 1231 | |
| 1232 | static inline int |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 1233 | ctnetlink_change_timeout(struct nf_conn *ct, const struct nlattr * const cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1234 | { |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 1235 | u_int32_t timeout = ntohl(nla_get_be32(cda[CTA_TIMEOUT])); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1236 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1237 | if (!del_timer(&ct->timeout)) |
| 1238 | return -ETIME; |
| 1239 | |
| 1240 | ct->timeout.expires = jiffies + timeout * HZ; |
| 1241 | add_timer(&ct->timeout); |
| 1242 | |
| 1243 | return 0; |
| 1244 | } |
| 1245 | |
Patrick McHardy | d0b0268 | 2010-02-10 15:38:33 +0100 | [diff] [blame] | 1246 | static const struct nla_policy protoinfo_policy[CTA_PROTOINFO_MAX+1] = { |
| 1247 | [CTA_PROTOINFO_TCP] = { .type = NLA_NESTED }, |
| 1248 | [CTA_PROTOINFO_DCCP] = { .type = NLA_NESTED }, |
| 1249 | [CTA_PROTOINFO_SCTP] = { .type = NLA_NESTED }, |
| 1250 | }; |
| 1251 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1252 | static inline int |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 1253 | ctnetlink_change_protoinfo(struct nf_conn *ct, const struct nlattr * const cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1254 | { |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 1255 | const struct nlattr *attr = cda[CTA_PROTOINFO]; |
| 1256 | struct nlattr *tb[CTA_PROTOINFO_MAX+1]; |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 1257 | struct nf_conntrack_l4proto *l4proto; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1258 | int err = 0; |
| 1259 | |
Patrick McHardy | d0b0268 | 2010-02-10 15:38:33 +0100 | [diff] [blame] | 1260 | nla_parse_nested(tb, CTA_PROTOINFO_MAX, attr, protoinfo_policy); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1261 | |
Florian Westphal | cd91566 | 2009-03-18 17:28:37 +0100 | [diff] [blame] | 1262 | rcu_read_lock(); |
| 1263 | l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct)); |
Patrick McHardy | fdf7083 | 2007-09-28 14:37:41 -0700 | [diff] [blame] | 1264 | if (l4proto->from_nlattr) |
| 1265 | err = l4proto->from_nlattr(tb, ct); |
Florian Westphal | cd91566 | 2009-03-18 17:28:37 +0100 | [diff] [blame] | 1266 | rcu_read_unlock(); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1267 | |
| 1268 | return err; |
| 1269 | } |
| 1270 | |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1271 | #ifdef CONFIG_NF_NAT_NEEDED |
Patrick McHardy | d0b0268 | 2010-02-10 15:38:33 +0100 | [diff] [blame] | 1272 | static const struct nla_policy nat_seq_policy[CTA_NAT_SEQ_MAX+1] = { |
| 1273 | [CTA_NAT_SEQ_CORRECTION_POS] = { .type = NLA_U32 }, |
| 1274 | [CTA_NAT_SEQ_OFFSET_BEFORE] = { .type = NLA_U32 }, |
| 1275 | [CTA_NAT_SEQ_OFFSET_AFTER] = { .type = NLA_U32 }, |
| 1276 | }; |
| 1277 | |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1278 | static inline int |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 1279 | change_nat_seq_adj(struct nf_nat_seq *natseq, const struct nlattr * const attr) |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1280 | { |
| 1281 | struct nlattr *cda[CTA_NAT_SEQ_MAX+1]; |
| 1282 | |
Patrick McHardy | d0b0268 | 2010-02-10 15:38:33 +0100 | [diff] [blame] | 1283 | nla_parse_nested(cda, CTA_NAT_SEQ_MAX, attr, nat_seq_policy); |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1284 | |
| 1285 | if (!cda[CTA_NAT_SEQ_CORRECTION_POS]) |
| 1286 | return -EINVAL; |
| 1287 | |
| 1288 | natseq->correction_pos = |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 1289 | ntohl(nla_get_be32(cda[CTA_NAT_SEQ_CORRECTION_POS])); |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1290 | |
| 1291 | if (!cda[CTA_NAT_SEQ_OFFSET_BEFORE]) |
| 1292 | return -EINVAL; |
| 1293 | |
| 1294 | natseq->offset_before = |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 1295 | ntohl(nla_get_be32(cda[CTA_NAT_SEQ_OFFSET_BEFORE])); |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1296 | |
| 1297 | if (!cda[CTA_NAT_SEQ_OFFSET_AFTER]) |
| 1298 | return -EINVAL; |
| 1299 | |
| 1300 | natseq->offset_after = |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 1301 | ntohl(nla_get_be32(cda[CTA_NAT_SEQ_OFFSET_AFTER])); |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1302 | |
| 1303 | return 0; |
| 1304 | } |
| 1305 | |
| 1306 | static int |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 1307 | ctnetlink_change_nat_seq_adj(struct nf_conn *ct, |
| 1308 | const struct nlattr * const cda[]) |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1309 | { |
| 1310 | int ret = 0; |
| 1311 | struct nf_conn_nat *nat = nfct_nat(ct); |
| 1312 | |
| 1313 | if (!nat) |
| 1314 | return 0; |
| 1315 | |
| 1316 | if (cda[CTA_NAT_SEQ_ADJ_ORIG]) { |
| 1317 | ret = change_nat_seq_adj(&nat->seq[IP_CT_DIR_ORIGINAL], |
| 1318 | cda[CTA_NAT_SEQ_ADJ_ORIG]); |
| 1319 | if (ret < 0) |
| 1320 | return ret; |
| 1321 | |
| 1322 | ct->status |= IPS_SEQ_ADJUST; |
| 1323 | } |
| 1324 | |
| 1325 | if (cda[CTA_NAT_SEQ_ADJ_REPLY]) { |
| 1326 | ret = change_nat_seq_adj(&nat->seq[IP_CT_DIR_REPLY], |
| 1327 | cda[CTA_NAT_SEQ_ADJ_REPLY]); |
| 1328 | if (ret < 0) |
| 1329 | return ret; |
| 1330 | |
| 1331 | ct->status |= IPS_SEQ_ADJUST; |
| 1332 | } |
| 1333 | |
| 1334 | return 0; |
| 1335 | } |
| 1336 | #endif |
| 1337 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1338 | static int |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 1339 | ctnetlink_change_conntrack(struct nf_conn *ct, |
| 1340 | const struct nlattr * const cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1341 | { |
| 1342 | int err; |
| 1343 | |
Pablo Neira Ayuso | e098360 | 2009-03-16 15:27:22 +0100 | [diff] [blame] | 1344 | /* only allow NAT changes and master assignation for new conntracks */ |
| 1345 | if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST] || cda[CTA_TUPLE_MASTER]) |
| 1346 | return -EOPNOTSUPP; |
| 1347 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1348 | if (cda[CTA_HELP]) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1349 | err = ctnetlink_change_helper(ct, cda); |
| 1350 | if (err < 0) |
| 1351 | return err; |
| 1352 | } |
| 1353 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1354 | if (cda[CTA_TIMEOUT]) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1355 | err = ctnetlink_change_timeout(ct, cda); |
| 1356 | if (err < 0) |
| 1357 | return err; |
| 1358 | } |
| 1359 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1360 | if (cda[CTA_STATUS]) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1361 | err = ctnetlink_change_status(ct, cda); |
| 1362 | if (err < 0) |
| 1363 | return err; |
| 1364 | } |
| 1365 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1366 | if (cda[CTA_PROTOINFO]) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1367 | err = ctnetlink_change_protoinfo(ct, cda); |
| 1368 | if (err < 0) |
| 1369 | return err; |
| 1370 | } |
| 1371 | |
Martin Josefsson | bcd1e83 | 2006-04-01 02:23:21 -0800 | [diff] [blame] | 1372 | #if defined(CONFIG_NF_CONNTRACK_MARK) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1373 | if (cda[CTA_MARK]) |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 1374 | ct->mark = ntohl(nla_get_be32(cda[CTA_MARK])); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1375 | #endif |
| 1376 | |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1377 | #ifdef CONFIG_NF_NAT_NEEDED |
| 1378 | if (cda[CTA_NAT_SEQ_ADJ_ORIG] || cda[CTA_NAT_SEQ_ADJ_REPLY]) { |
| 1379 | err = ctnetlink_change_nat_seq_adj(ct, cda); |
| 1380 | if (err < 0) |
| 1381 | return err; |
| 1382 | } |
| 1383 | #endif |
| 1384 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1385 | return 0; |
| 1386 | } |
| 1387 | |
Pablo Neira Ayuso | f0a3c08 | 2009-03-16 15:28:09 +0100 | [diff] [blame] | 1388 | static struct nf_conn * |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 1389 | ctnetlink_create_conntrack(struct net *net, u16 zone, |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 1390 | const struct nlattr * const cda[], |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1391 | struct nf_conntrack_tuple *otuple, |
Pablo Neira Ayuso | 5faa1f4 | 2007-09-28 14:43:53 -0700 | [diff] [blame] | 1392 | struct nf_conntrack_tuple *rtuple, |
Pablo Neira Ayuso | 7ec4749 | 2009-03-16 15:25:46 +0100 | [diff] [blame] | 1393 | u8 u3) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1394 | { |
| 1395 | struct nf_conn *ct; |
| 1396 | int err = -EINVAL; |
Yasuyuki Kozakai | ceceae1 | 2007-07-07 22:23:42 -0700 | [diff] [blame] | 1397 | struct nf_conntrack_helper *helper; |
Pablo Neira Ayuso | 315c34d | 2011-04-21 10:55:07 +0200 | [diff] [blame] | 1398 | struct nf_conn_tstamp *tstamp; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1399 | |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 1400 | ct = nf_conntrack_alloc(net, zone, otuple, rtuple, GFP_ATOMIC); |
Julia Lawall | cd7fcbf | 2009-01-12 00:06:08 +0000 | [diff] [blame] | 1401 | if (IS_ERR(ct)) |
Pablo Neira Ayuso | f0a3c08 | 2009-03-16 15:28:09 +0100 | [diff] [blame] | 1402 | return ERR_PTR(-ENOMEM); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1403 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1404 | if (!cda[CTA_TIMEOUT]) |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1405 | goto err1; |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 1406 | ct->timeout.expires = ntohl(nla_get_be32(cda[CTA_TIMEOUT])); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1407 | |
| 1408 | ct->timeout.expires = jiffies + ct->timeout.expires * HZ; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1409 | |
Patrick McHardy | 58a3c9b | 2008-01-31 04:36:54 -0800 | [diff] [blame] | 1410 | rcu_read_lock(); |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1411 | if (cda[CTA_HELP]) { |
Pablo Neira Ayuso | 29fe1b4 | 2009-04-22 02:26:37 -0700 | [diff] [blame] | 1412 | char *helpname = NULL; |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1413 | |
| 1414 | err = ctnetlink_parse_help(cda[CTA_HELP], &helpname); |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1415 | if (err < 0) |
| 1416 | goto err2; |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1417 | |
Patrick McHardy | 794e687 | 2010-02-03 13:41:29 +0100 | [diff] [blame] | 1418 | helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct), |
| 1419 | nf_ct_protonum(ct)); |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1420 | if (helper == NULL) { |
| 1421 | rcu_read_unlock(); |
| 1422 | #ifdef CONFIG_MODULES |
| 1423 | if (request_module("nfct-helper-%s", helpname) < 0) { |
| 1424 | err = -EOPNOTSUPP; |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1425 | goto err1; |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1426 | } |
| 1427 | |
| 1428 | rcu_read_lock(); |
Patrick McHardy | 794e687 | 2010-02-03 13:41:29 +0100 | [diff] [blame] | 1429 | helper = __nf_conntrack_helper_find(helpname, |
| 1430 | nf_ct_l3num(ct), |
| 1431 | nf_ct_protonum(ct)); |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1432 | if (helper) { |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1433 | err = -EAGAIN; |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1434 | goto err2; |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1435 | } |
| 1436 | rcu_read_unlock(); |
| 1437 | #endif |
| 1438 | err = -EOPNOTSUPP; |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1439 | goto err1; |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1440 | } else { |
| 1441 | struct nf_conn_help *help; |
| 1442 | |
Pablo Neira Ayuso | 1afc567 | 2012-06-07 12:11:50 +0200 | [diff] [blame] | 1443 | help = nf_ct_helper_ext_add(ct, helper, GFP_ATOMIC); |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1444 | if (help == NULL) { |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1445 | err = -ENOMEM; |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1446 | goto err2; |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1447 | } |
| 1448 | |
| 1449 | /* not in hash table yet so not strictly necessary */ |
Stephen Hemminger | a9b3cd7 | 2011-08-01 16:19:00 +0000 | [diff] [blame] | 1450 | RCU_INIT_POINTER(help->helper, helper); |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1451 | } |
| 1452 | } else { |
| 1453 | /* try an implicit helper assignation */ |
Patrick McHardy | b2a15a6 | 2010-02-03 14:13:03 +0100 | [diff] [blame] | 1454 | err = __nf_ct_try_assign_helper(ct, NULL, GFP_ATOMIC); |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1455 | if (err < 0) |
| 1456 | goto err2; |
Patrick McHarrdy | 3c158f7 | 2007-06-05 12:55:27 -0700 | [diff] [blame] | 1457 | } |
Yasuyuki Kozakai | dafc741 | 2006-11-27 10:25:32 -0800 | [diff] [blame] | 1458 | |
Pablo Neira Ayuso | a88e22a | 2010-02-19 14:24:39 +0100 | [diff] [blame] | 1459 | if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST]) { |
| 1460 | err = ctnetlink_change_nat(ct, cda); |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1461 | if (err < 0) |
| 1462 | goto err2; |
Pablo Neira Ayuso | 1575e7e | 2008-08-18 21:30:55 -0700 | [diff] [blame] | 1463 | } |
| 1464 | |
Pablo Neira Ayuso | a88e22a | 2010-02-19 14:24:39 +0100 | [diff] [blame] | 1465 | nf_ct_acct_ext_add(ct, GFP_ATOMIC); |
Pablo Neira Ayuso | a992ca2 | 2011-01-19 16:00:07 +0100 | [diff] [blame] | 1466 | nf_ct_tstamp_ext_add(ct, GFP_ATOMIC); |
Pablo Neira Ayuso | a88e22a | 2010-02-19 14:24:39 +0100 | [diff] [blame] | 1467 | nf_ct_ecache_ext_add(ct, 0, 0, GFP_ATOMIC); |
| 1468 | /* we must add conntrack extensions before confirmation. */ |
| 1469 | ct->status |= IPS_CONFIRMED; |
| 1470 | |
| 1471 | if (cda[CTA_STATUS]) { |
| 1472 | err = ctnetlink_change_status(ct, cda); |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1473 | if (err < 0) |
| 1474 | goto err2; |
Pablo Neira Ayuso | e6a7d3c | 2008-10-14 11:58:31 -0700 | [diff] [blame] | 1475 | } |
| 1476 | |
Pablo Neira Ayuso | c969aa7 | 2009-02-09 14:33:57 -0800 | [diff] [blame] | 1477 | #ifdef CONFIG_NF_NAT_NEEDED |
| 1478 | if (cda[CTA_NAT_SEQ_ADJ_ORIG] || cda[CTA_NAT_SEQ_ADJ_REPLY]) { |
| 1479 | err = ctnetlink_change_nat_seq_adj(ct, cda); |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1480 | if (err < 0) |
| 1481 | goto err2; |
Pablo Neira Ayuso | c969aa7 | 2009-02-09 14:33:57 -0800 | [diff] [blame] | 1482 | } |
| 1483 | #endif |
| 1484 | |
Changli Gao | e5fc9e7 | 2010-11-12 17:33:17 +0100 | [diff] [blame] | 1485 | memset(&ct->proto, 0, sizeof(ct->proto)); |
Pablo Neira Ayuso | 1575e7e | 2008-08-18 21:30:55 -0700 | [diff] [blame] | 1486 | if (cda[CTA_PROTOINFO]) { |
| 1487 | err = ctnetlink_change_protoinfo(ct, cda); |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1488 | if (err < 0) |
| 1489 | goto err2; |
Pablo Neira Ayuso | 1575e7e | 2008-08-18 21:30:55 -0700 | [diff] [blame] | 1490 | } |
| 1491 | |
Pablo Neira Ayuso | 1575e7e | 2008-08-18 21:30:55 -0700 | [diff] [blame] | 1492 | #if defined(CONFIG_NF_CONNTRACK_MARK) |
| 1493 | if (cda[CTA_MARK]) |
| 1494 | ct->mark = ntohl(nla_get_be32(cda[CTA_MARK])); |
| 1495 | #endif |
| 1496 | |
Pablo Neira Ayuso | 5faa1f4 | 2007-09-28 14:43:53 -0700 | [diff] [blame] | 1497 | /* setup master conntrack: this is a confirmed expectation */ |
Pablo Neira Ayuso | 7ec4749 | 2009-03-16 15:25:46 +0100 | [diff] [blame] | 1498 | if (cda[CTA_TUPLE_MASTER]) { |
| 1499 | struct nf_conntrack_tuple master; |
| 1500 | struct nf_conntrack_tuple_hash *master_h; |
| 1501 | struct nf_conn *master_ct; |
| 1502 | |
| 1503 | err = ctnetlink_parse_tuple(cda, &master, CTA_TUPLE_MASTER, u3); |
| 1504 | if (err < 0) |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1505 | goto err2; |
Pablo Neira Ayuso | 7ec4749 | 2009-03-16 15:25:46 +0100 | [diff] [blame] | 1506 | |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 1507 | master_h = nf_conntrack_find_get(net, zone, &master); |
Pablo Neira Ayuso | 7ec4749 | 2009-03-16 15:25:46 +0100 | [diff] [blame] | 1508 | if (master_h == NULL) { |
| 1509 | err = -ENOENT; |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1510 | goto err2; |
Pablo Neira Ayuso | 7ec4749 | 2009-03-16 15:25:46 +0100 | [diff] [blame] | 1511 | } |
| 1512 | master_ct = nf_ct_tuplehash_to_ctrack(master_h); |
Pablo Neira Ayuso | f2a8900 | 2007-12-12 10:34:29 -0800 | [diff] [blame] | 1513 | __set_bit(IPS_EXPECTED_BIT, &ct->status); |
Pablo Neira Ayuso | 5faa1f4 | 2007-09-28 14:43:53 -0700 | [diff] [blame] | 1514 | ct->master = master_ct; |
Pablo Neira Ayuso | f2a8900 | 2007-12-12 10:34:29 -0800 | [diff] [blame] | 1515 | } |
Pablo Neira Ayuso | 315c34d | 2011-04-21 10:55:07 +0200 | [diff] [blame] | 1516 | tstamp = nf_conn_tstamp_find(ct); |
| 1517 | if (tstamp) |
| 1518 | tstamp->start = ktime_to_ns(ktime_get_real()); |
Pablo Neira Ayuso | 5faa1f4 | 2007-09-28 14:43:53 -0700 | [diff] [blame] | 1519 | |
Jozsef Kadlecsik | 7d367e0 | 2012-02-24 11:45:49 +0100 | [diff] [blame] | 1520 | err = nf_conntrack_hash_check_insert(ct); |
| 1521 | if (err < 0) |
| 1522 | goto err2; |
| 1523 | |
Patrick McHardy | 58a3c9b | 2008-01-31 04:36:54 -0800 | [diff] [blame] | 1524 | rcu_read_unlock(); |
Yasuyuki Kozakai | dafc741 | 2006-11-27 10:25:32 -0800 | [diff] [blame] | 1525 | |
Pablo Neira Ayuso | f0a3c08 | 2009-03-16 15:28:09 +0100 | [diff] [blame] | 1526 | return ct; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1527 | |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1528 | err2: |
| 1529 | rcu_read_unlock(); |
| 1530 | err1: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1531 | nf_conntrack_free(ct); |
Pablo Neira Ayuso | f0a3c08 | 2009-03-16 15:28:09 +0100 | [diff] [blame] | 1532 | return ERR_PTR(err); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1533 | } |
| 1534 | |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1535 | static int |
| 1536 | ctnetlink_new_conntrack(struct sock *ctnl, struct sk_buff *skb, |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 1537 | const struct nlmsghdr *nlh, |
| 1538 | const struct nlattr * const cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1539 | { |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 1540 | struct net *net = sock_net(ctnl); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1541 | struct nf_conntrack_tuple otuple, rtuple; |
| 1542 | struct nf_conntrack_tuple_hash *h = NULL; |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 1543 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
Jozsef Kadlecsik | 7d367e0 | 2012-02-24 11:45:49 +0100 | [diff] [blame] | 1544 | struct nf_conn *ct; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1545 | u_int8_t u3 = nfmsg->nfgen_family; |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 1546 | u16 zone; |
| 1547 | int err; |
| 1548 | |
| 1549 | err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone); |
| 1550 | if (err < 0) |
| 1551 | return err; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1552 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1553 | if (cda[CTA_TUPLE_ORIG]) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1554 | err = ctnetlink_parse_tuple(cda, &otuple, CTA_TUPLE_ORIG, u3); |
| 1555 | if (err < 0) |
| 1556 | return err; |
| 1557 | } |
| 1558 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1559 | if (cda[CTA_TUPLE_REPLY]) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1560 | err = ctnetlink_parse_tuple(cda, &rtuple, CTA_TUPLE_REPLY, u3); |
| 1561 | if (err < 0) |
| 1562 | return err; |
| 1563 | } |
| 1564 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1565 | if (cda[CTA_TUPLE_ORIG]) |
Jozsef Kadlecsik | 7d367e0 | 2012-02-24 11:45:49 +0100 | [diff] [blame] | 1566 | h = nf_conntrack_find_get(net, zone, &otuple); |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1567 | else if (cda[CTA_TUPLE_REPLY]) |
Jozsef Kadlecsik | 7d367e0 | 2012-02-24 11:45:49 +0100 | [diff] [blame] | 1568 | h = nf_conntrack_find_get(net, zone, &rtuple); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1569 | |
| 1570 | if (h == NULL) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1571 | err = -ENOENT; |
Pablo Neira Ayuso | f0a3c08 | 2009-03-16 15:28:09 +0100 | [diff] [blame] | 1572 | if (nlh->nlmsg_flags & NLM_F_CREATE) { |
Pablo Neira Ayuso | fecc113 | 2009-05-05 17:48:26 +0200 | [diff] [blame] | 1573 | enum ip_conntrack_events events; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1574 | |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 1575 | ct = ctnetlink_create_conntrack(net, zone, cda, &otuple, |
Pablo Neira Ayuso | f0a3c08 | 2009-03-16 15:28:09 +0100 | [diff] [blame] | 1576 | &rtuple, u3); |
Jozsef Kadlecsik | 7d367e0 | 2012-02-24 11:45:49 +0100 | [diff] [blame] | 1577 | if (IS_ERR(ct)) |
| 1578 | return PTR_ERR(ct); |
| 1579 | |
Pablo Neira Ayuso | f0a3c08 | 2009-03-16 15:28:09 +0100 | [diff] [blame] | 1580 | err = 0; |
Pablo Neira Ayuso | fecc113 | 2009-05-05 17:48:26 +0200 | [diff] [blame] | 1581 | if (test_bit(IPS_EXPECTED_BIT, &ct->status)) |
| 1582 | events = IPCT_RELATED; |
| 1583 | else |
| 1584 | events = IPCT_NEW; |
| 1585 | |
Patrick McHardy | 858b3133 | 2010-02-03 13:48:53 +0100 | [diff] [blame] | 1586 | nf_conntrack_eventmask_report((1 << IPCT_REPLY) | |
| 1587 | (1 << IPCT_ASSURED) | |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 1588 | (1 << IPCT_HELPER) | |
| 1589 | (1 << IPCT_PROTOINFO) | |
| 1590 | (1 << IPCT_NATSEQADJ) | |
| 1591 | (1 << IPCT_MARK) | events, |
| 1592 | ct, NETLINK_CB(skb).pid, |
| 1593 | nlmsg_report(nlh)); |
Pablo Neira Ayuso | f0a3c08 | 2009-03-16 15:28:09 +0100 | [diff] [blame] | 1594 | nf_ct_put(ct); |
Jozsef Kadlecsik | 7d367e0 | 2012-02-24 11:45:49 +0100 | [diff] [blame] | 1595 | } |
Pablo Neira Ayuso | 5faa1f4 | 2007-09-28 14:43:53 -0700 | [diff] [blame] | 1596 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1597 | return err; |
| 1598 | } |
| 1599 | /* implicit 'else' */ |
| 1600 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1601 | err = -EEXIST; |
Jozsef Kadlecsik | 7d367e0 | 2012-02-24 11:45:49 +0100 | [diff] [blame] | 1602 | ct = nf_ct_tuplehash_to_ctrack(h); |
Pablo Neira Ayuso | ff4ca82 | 2007-08-07 18:11:26 -0700 | [diff] [blame] | 1603 | if (!(nlh->nlmsg_flags & NLM_F_EXCL)) { |
Jozsef Kadlecsik | 7d367e0 | 2012-02-24 11:45:49 +0100 | [diff] [blame] | 1604 | spin_lock_bh(&nf_conntrack_lock); |
Pablo Neira Ayuso | 19abb7b | 2008-11-18 11:56:20 +0100 | [diff] [blame] | 1605 | err = ctnetlink_change_conntrack(ct, cda); |
Jozsef Kadlecsik | 7d367e0 | 2012-02-24 11:45:49 +0100 | [diff] [blame] | 1606 | spin_unlock_bh(&nf_conntrack_lock); |
Pablo Neira Ayuso | 19abb7b | 2008-11-18 11:56:20 +0100 | [diff] [blame] | 1607 | if (err == 0) { |
Patrick McHardy | 858b3133 | 2010-02-03 13:48:53 +0100 | [diff] [blame] | 1608 | nf_conntrack_eventmask_report((1 << IPCT_REPLY) | |
| 1609 | (1 << IPCT_ASSURED) | |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 1610 | (1 << IPCT_HELPER) | |
| 1611 | (1 << IPCT_PROTOINFO) | |
| 1612 | (1 << IPCT_NATSEQADJ) | |
| 1613 | (1 << IPCT_MARK), |
| 1614 | ct, NETLINK_CB(skb).pid, |
| 1615 | nlmsg_report(nlh)); |
Jozsef Kadlecsik | 7d367e0 | 2012-02-24 11:45:49 +0100 | [diff] [blame] | 1616 | } |
Pablo Neira Ayuso | ff4ca82 | 2007-08-07 18:11:26 -0700 | [diff] [blame] | 1617 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1618 | |
Jozsef Kadlecsik | 7d367e0 | 2012-02-24 11:45:49 +0100 | [diff] [blame] | 1619 | nf_ct_put(ct); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1620 | return err; |
| 1621 | } |
| 1622 | |
Pablo Neira Ayuso | 9cb0176 | 2012-06-07 12:13:39 +0200 | [diff] [blame^] | 1623 | #if defined(CONFIG_NETFILTER_NETLINK_QUEUE) || \ |
| 1624 | defined(CONFIG_NETFILTER_NETLINK_QUEUE_MODULE) |
| 1625 | static size_t |
| 1626 | ctnetlink_nfqueue_build_size(const struct nf_conn *ct) |
| 1627 | { |
| 1628 | return 3 * nla_total_size(0) /* CTA_TUPLE_ORIG|REPL|MASTER */ |
| 1629 | + 3 * nla_total_size(0) /* CTA_TUPLE_IP */ |
| 1630 | + 3 * nla_total_size(0) /* CTA_TUPLE_PROTO */ |
| 1631 | + 3 * nla_total_size(sizeof(u_int8_t)) /* CTA_PROTO_NUM */ |
| 1632 | + nla_total_size(sizeof(u_int32_t)) /* CTA_ID */ |
| 1633 | + nla_total_size(sizeof(u_int32_t)) /* CTA_STATUS */ |
| 1634 | + nla_total_size(sizeof(u_int32_t)) /* CTA_TIMEOUT */ |
| 1635 | + nla_total_size(0) /* CTA_PROTOINFO */ |
| 1636 | + nla_total_size(0) /* CTA_HELP */ |
| 1637 | + nla_total_size(NF_CT_HELPER_NAME_LEN) /* CTA_HELP_NAME */ |
| 1638 | + ctnetlink_secctx_size(ct) |
| 1639 | #ifdef CONFIG_NF_NAT_NEEDED |
| 1640 | + 2 * nla_total_size(0) /* CTA_NAT_SEQ_ADJ_ORIG|REPL */ |
| 1641 | + 6 * nla_total_size(sizeof(u_int32_t)) /* CTA_NAT_SEQ_OFFSET */ |
| 1642 | #endif |
| 1643 | #ifdef CONFIG_NF_CONNTRACK_MARK |
| 1644 | + nla_total_size(sizeof(u_int32_t)) /* CTA_MARK */ |
| 1645 | #endif |
| 1646 | + ctnetlink_proto_size(ct) |
| 1647 | ; |
| 1648 | } |
| 1649 | |
| 1650 | static int |
| 1651 | ctnetlink_nfqueue_build(struct sk_buff *skb, struct nf_conn *ct) |
| 1652 | { |
| 1653 | struct nlattr *nest_parms; |
| 1654 | |
| 1655 | rcu_read_lock(); |
| 1656 | nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED); |
| 1657 | if (!nest_parms) |
| 1658 | goto nla_put_failure; |
| 1659 | if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0) |
| 1660 | goto nla_put_failure; |
| 1661 | nla_nest_end(skb, nest_parms); |
| 1662 | |
| 1663 | nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED); |
| 1664 | if (!nest_parms) |
| 1665 | goto nla_put_failure; |
| 1666 | if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0) |
| 1667 | goto nla_put_failure; |
| 1668 | nla_nest_end(skb, nest_parms); |
| 1669 | |
| 1670 | if (nf_ct_zone(ct)) { |
| 1671 | if (nla_put_be16(skb, CTA_ZONE, htons(nf_ct_zone(ct)))) |
| 1672 | goto nla_put_failure; |
| 1673 | } |
| 1674 | |
| 1675 | if (ctnetlink_dump_id(skb, ct) < 0) |
| 1676 | goto nla_put_failure; |
| 1677 | |
| 1678 | if (ctnetlink_dump_status(skb, ct) < 0) |
| 1679 | goto nla_put_failure; |
| 1680 | |
| 1681 | if (ctnetlink_dump_timeout(skb, ct) < 0) |
| 1682 | goto nla_put_failure; |
| 1683 | |
| 1684 | if (ctnetlink_dump_protoinfo(skb, ct) < 0) |
| 1685 | goto nla_put_failure; |
| 1686 | |
| 1687 | if (ctnetlink_dump_helpinfo(skb, ct) < 0) |
| 1688 | goto nla_put_failure; |
| 1689 | |
| 1690 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
| 1691 | if (ct->secmark && ctnetlink_dump_secctx(skb, ct) < 0) |
| 1692 | goto nla_put_failure; |
| 1693 | #endif |
| 1694 | if (ct->master && ctnetlink_dump_master(skb, ct) < 0) |
| 1695 | goto nla_put_failure; |
| 1696 | |
| 1697 | if ((ct->status & IPS_SEQ_ADJUST) && |
| 1698 | ctnetlink_dump_nat_seq_adj(skb, ct) < 0) |
| 1699 | goto nla_put_failure; |
| 1700 | |
| 1701 | #ifdef CONFIG_NF_CONNTRACK_MARK |
| 1702 | if (ct->mark && ctnetlink_dump_mark(skb, ct) < 0) |
| 1703 | goto nla_put_failure; |
| 1704 | #endif |
| 1705 | rcu_read_unlock(); |
| 1706 | return 0; |
| 1707 | |
| 1708 | nla_put_failure: |
| 1709 | rcu_read_unlock(); |
| 1710 | return -ENOSPC; |
| 1711 | } |
| 1712 | |
| 1713 | static int |
| 1714 | ctnetlink_nfqueue_parse_ct(const struct nlattr *cda[], struct nf_conn *ct) |
| 1715 | { |
| 1716 | int err; |
| 1717 | |
| 1718 | if (cda[CTA_TIMEOUT]) { |
| 1719 | err = ctnetlink_change_timeout(ct, cda); |
| 1720 | if (err < 0) |
| 1721 | return err; |
| 1722 | } |
| 1723 | if (cda[CTA_STATUS]) { |
| 1724 | err = ctnetlink_change_status(ct, cda); |
| 1725 | if (err < 0) |
| 1726 | return err; |
| 1727 | } |
| 1728 | if (cda[CTA_HELP]) { |
| 1729 | err = ctnetlink_change_helper(ct, cda); |
| 1730 | if (err < 0) |
| 1731 | return err; |
| 1732 | } |
| 1733 | #if defined(CONFIG_NF_CONNTRACK_MARK) |
| 1734 | if (cda[CTA_MARK]) |
| 1735 | ct->mark = ntohl(nla_get_be32(cda[CTA_MARK])); |
| 1736 | #endif |
| 1737 | return 0; |
| 1738 | } |
| 1739 | |
| 1740 | static int |
| 1741 | ctnetlink_nfqueue_parse(const struct nlattr *attr, struct nf_conn *ct) |
| 1742 | { |
| 1743 | struct nlattr *cda[CTA_MAX+1]; |
| 1744 | |
| 1745 | nla_parse_nested(cda, CTA_MAX, attr, ct_nla_policy); |
| 1746 | |
| 1747 | return ctnetlink_nfqueue_parse_ct((const struct nlattr **)cda, ct); |
| 1748 | } |
| 1749 | |
| 1750 | static struct nfq_ct_hook ctnetlink_nfqueue_hook = { |
| 1751 | .build_size = ctnetlink_nfqueue_build_size, |
| 1752 | .build = ctnetlink_nfqueue_build, |
| 1753 | .parse = ctnetlink_nfqueue_parse, |
| 1754 | }; |
| 1755 | #endif /* CONFIG_NETFILTER_NETLINK_QUEUE */ |
| 1756 | |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1757 | /*********************************************************************** |
| 1758 | * EXPECT |
| 1759 | ***********************************************************************/ |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1760 | |
| 1761 | static inline int |
| 1762 | ctnetlink_exp_dump_tuple(struct sk_buff *skb, |
| 1763 | const struct nf_conntrack_tuple *tuple, |
| 1764 | enum ctattr_expect type) |
| 1765 | { |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1766 | struct nlattr *nest_parms; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1767 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1768 | nest_parms = nla_nest_start(skb, type | NLA_F_NESTED); |
| 1769 | if (!nest_parms) |
| 1770 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1771 | if (ctnetlink_dump_tuples(skb, tuple) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1772 | goto nla_put_failure; |
| 1773 | nla_nest_end(skb, nest_parms); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1774 | |
| 1775 | return 0; |
| 1776 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1777 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1778 | return -1; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1779 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1780 | |
| 1781 | static inline int |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 1782 | ctnetlink_exp_dump_mask(struct sk_buff *skb, |
| 1783 | const struct nf_conntrack_tuple *tuple, |
Patrick McHardy | d4156e8 | 2007-07-07 22:31:32 -0700 | [diff] [blame] | 1784 | const struct nf_conntrack_tuple_mask *mask) |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 1785 | { |
| 1786 | int ret; |
| 1787 | struct nf_conntrack_l3proto *l3proto; |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 1788 | struct nf_conntrack_l4proto *l4proto; |
Patrick McHardy | d4156e8 | 2007-07-07 22:31:32 -0700 | [diff] [blame] | 1789 | struct nf_conntrack_tuple m; |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1790 | struct nlattr *nest_parms; |
Patrick McHardy | d4156e8 | 2007-07-07 22:31:32 -0700 | [diff] [blame] | 1791 | |
| 1792 | memset(&m, 0xFF, sizeof(m)); |
Patrick McHardy | d4156e8 | 2007-07-07 22:31:32 -0700 | [diff] [blame] | 1793 | memcpy(&m.src.u3, &mask->src.u3, sizeof(m.src.u3)); |
Patrick McHardy | e578756 | 2010-01-26 17:04:02 +0100 | [diff] [blame] | 1794 | m.src.u.all = mask->src.u.all; |
| 1795 | m.dst.protonum = tuple->dst.protonum; |
Patrick McHardy | d4156e8 | 2007-07-07 22:31:32 -0700 | [diff] [blame] | 1796 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1797 | nest_parms = nla_nest_start(skb, CTA_EXPECT_MASK | NLA_F_NESTED); |
| 1798 | if (!nest_parms) |
| 1799 | goto nla_put_failure; |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 1800 | |
Hans Schillstrom | 3b988ec | 2012-03-05 02:24:29 +0000 | [diff] [blame] | 1801 | rcu_read_lock(); |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 1802 | l3proto = __nf_ct_l3proto_find(tuple->src.l3num); |
Patrick McHardy | d4156e8 | 2007-07-07 22:31:32 -0700 | [diff] [blame] | 1803 | ret = ctnetlink_dump_tuples_ip(skb, &m, l3proto); |
Hans Schillstrom | 3b988ec | 2012-03-05 02:24:29 +0000 | [diff] [blame] | 1804 | if (ret >= 0) { |
| 1805 | l4proto = __nf_ct_l4proto_find(tuple->src.l3num, |
| 1806 | tuple->dst.protonum); |
Patrick McHardy | d4156e8 | 2007-07-07 22:31:32 -0700 | [diff] [blame] | 1807 | ret = ctnetlink_dump_tuples_proto(skb, &m, l4proto); |
Hans Schillstrom | 3b988ec | 2012-03-05 02:24:29 +0000 | [diff] [blame] | 1808 | } |
| 1809 | rcu_read_unlock(); |
| 1810 | |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 1811 | if (unlikely(ret < 0)) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1812 | goto nla_put_failure; |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 1813 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1814 | nla_nest_end(skb, nest_parms); |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 1815 | |
| 1816 | return 0; |
| 1817 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1818 | nla_put_failure: |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 1819 | return -1; |
| 1820 | } |
| 1821 | |
Ilpo Järvinen | bb5cf80 | 2008-01-05 23:11:31 -0800 | [diff] [blame] | 1822 | static int |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1823 | ctnetlink_exp_dump_expect(struct sk_buff *skb, |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1824 | const struct nf_conntrack_expect *exp) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1825 | { |
| 1826 | struct nf_conn *master = exp->master; |
Xi Wang | c121638 | 2011-12-30 10:40:17 -0500 | [diff] [blame] | 1827 | long timeout = ((long)exp->timeout.expires - (long)jiffies) / HZ; |
Pablo Neira Ayuso | bc01befd | 2010-09-28 21:06:34 +0200 | [diff] [blame] | 1828 | struct nf_conn_help *help; |
Pablo Neira Ayuso | 076a0ca | 2012-02-05 03:41:52 +0100 | [diff] [blame] | 1829 | #ifdef CONFIG_NF_NAT_NEEDED |
| 1830 | struct nlattr *nest_parms; |
| 1831 | struct nf_conntrack_tuple nat_tuple = {}; |
| 1832 | #endif |
Pablo Neira Ayuso | 544d5c7 | 2012-02-05 03:44:51 +0100 | [diff] [blame] | 1833 | struct nf_ct_helper_expectfn *expfn; |
| 1834 | |
Patrick McHardy | d978e5d | 2007-12-17 22:37:03 -0800 | [diff] [blame] | 1835 | if (timeout < 0) |
| 1836 | timeout = 0; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1837 | |
| 1838 | if (ctnetlink_exp_dump_tuple(skb, &exp->tuple, CTA_EXPECT_TUPLE) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1839 | goto nla_put_failure; |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 1840 | if (ctnetlink_exp_dump_mask(skb, &exp->tuple, &exp->mask) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1841 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1842 | if (ctnetlink_exp_dump_tuple(skb, |
| 1843 | &master->tuplehash[IP_CT_DIR_ORIGINAL].tuple, |
| 1844 | CTA_EXPECT_MASTER) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1845 | goto nla_put_failure; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1846 | |
Pablo Neira Ayuso | 076a0ca | 2012-02-05 03:41:52 +0100 | [diff] [blame] | 1847 | #ifdef CONFIG_NF_NAT_NEEDED |
| 1848 | if (exp->saved_ip || exp->saved_proto.all) { |
| 1849 | nest_parms = nla_nest_start(skb, CTA_EXPECT_NAT | NLA_F_NESTED); |
| 1850 | if (!nest_parms) |
| 1851 | goto nla_put_failure; |
| 1852 | |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 1853 | if (nla_put_be32(skb, CTA_EXPECT_NAT_DIR, htonl(exp->dir))) |
| 1854 | goto nla_put_failure; |
Pablo Neira Ayuso | 076a0ca | 2012-02-05 03:41:52 +0100 | [diff] [blame] | 1855 | |
| 1856 | nat_tuple.src.l3num = nf_ct_l3num(master); |
| 1857 | nat_tuple.src.u3.ip = exp->saved_ip; |
| 1858 | nat_tuple.dst.protonum = nf_ct_protonum(master); |
| 1859 | nat_tuple.src.u = exp->saved_proto; |
| 1860 | |
| 1861 | if (ctnetlink_exp_dump_tuple(skb, &nat_tuple, |
| 1862 | CTA_EXPECT_NAT_TUPLE) < 0) |
| 1863 | goto nla_put_failure; |
| 1864 | nla_nest_end(skb, nest_parms); |
| 1865 | } |
| 1866 | #endif |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 1867 | if (nla_put_be32(skb, CTA_EXPECT_TIMEOUT, htonl(timeout)) || |
| 1868 | nla_put_be32(skb, CTA_EXPECT_ID, htonl((unsigned long)exp)) || |
| 1869 | nla_put_be32(skb, CTA_EXPECT_FLAGS, htonl(exp->flags)) || |
| 1870 | nla_put_be32(skb, CTA_EXPECT_CLASS, htonl(exp->class))) |
| 1871 | goto nla_put_failure; |
Pablo Neira Ayuso | bc01befd | 2010-09-28 21:06:34 +0200 | [diff] [blame] | 1872 | help = nfct_help(master); |
| 1873 | if (help) { |
| 1874 | struct nf_conntrack_helper *helper; |
| 1875 | |
| 1876 | helper = rcu_dereference(help->helper); |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 1877 | if (helper && |
| 1878 | nla_put_string(skb, CTA_EXPECT_HELP_NAME, helper->name)) |
| 1879 | goto nla_put_failure; |
Pablo Neira Ayuso | bc01befd | 2010-09-28 21:06:34 +0200 | [diff] [blame] | 1880 | } |
Pablo Neira Ayuso | 544d5c7 | 2012-02-05 03:44:51 +0100 | [diff] [blame] | 1881 | expfn = nf_ct_helper_expectfn_find_by_symbol(exp->expectfn); |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 1882 | if (expfn != NULL && |
| 1883 | nla_put_string(skb, CTA_EXPECT_FN, expfn->name)) |
| 1884 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1885 | |
| 1886 | return 0; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1887 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1888 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1889 | return -1; |
| 1890 | } |
| 1891 | |
| 1892 | static int |
| 1893 | ctnetlink_exp_fill_info(struct sk_buff *skb, u32 pid, u32 seq, |
Pablo Neira Ayuso | 8b0a231 | 2009-06-02 20:03:34 +0200 | [diff] [blame] | 1894 | int event, const struct nf_conntrack_expect *exp) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1895 | { |
| 1896 | struct nlmsghdr *nlh; |
| 1897 | struct nfgenmsg *nfmsg; |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 1898 | unsigned int flags = pid ? NLM_F_MULTI : 0; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1899 | |
| 1900 | event |= NFNL_SUBSYS_CTNETLINK_EXP << 8; |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 1901 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*nfmsg), flags); |
| 1902 | if (nlh == NULL) |
| 1903 | goto nlmsg_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1904 | |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 1905 | nfmsg = nlmsg_data(nlh); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1906 | nfmsg->nfgen_family = exp->tuple.src.l3num; |
| 1907 | nfmsg->version = NFNETLINK_V0; |
| 1908 | nfmsg->res_id = 0; |
| 1909 | |
| 1910 | if (ctnetlink_exp_dump_expect(skb, exp) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1911 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1912 | |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 1913 | nlmsg_end(skb, nlh); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1914 | return skb->len; |
| 1915 | |
| 1916 | nlmsg_failure: |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1917 | nla_put_failure: |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 1918 | nlmsg_cancel(skb, nlh); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1919 | return -1; |
| 1920 | } |
| 1921 | |
| 1922 | #ifdef CONFIG_NF_CONNTRACK_EVENTS |
Pablo Neira Ayuso | e34d5c1 | 2009-06-03 10:32:06 +0200 | [diff] [blame] | 1923 | static int |
| 1924 | ctnetlink_expect_event(unsigned int events, struct nf_exp_event *item) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1925 | { |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 1926 | struct nf_conntrack_expect *exp = item->exp; |
| 1927 | struct net *net = nf_ct_exp_net(exp); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1928 | struct nlmsghdr *nlh; |
| 1929 | struct nfgenmsg *nfmsg; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1930 | struct sk_buff *skb; |
Pablo Neira Ayuso | ebbf41d | 2010-10-19 10:19:06 +0200 | [diff] [blame] | 1931 | unsigned int type, group; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1932 | int flags = 0; |
| 1933 | |
Pablo Neira Ayuso | ebbf41d | 2010-10-19 10:19:06 +0200 | [diff] [blame] | 1934 | if (events & (1 << IPEXP_DESTROY)) { |
| 1935 | type = IPCTNL_MSG_EXP_DELETE; |
| 1936 | group = NFNLGRP_CONNTRACK_EXP_DESTROY; |
| 1937 | } else if (events & (1 << IPEXP_NEW)) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1938 | type = IPCTNL_MSG_EXP_NEW; |
| 1939 | flags = NLM_F_CREATE|NLM_F_EXCL; |
Pablo Neira Ayuso | ebbf41d | 2010-10-19 10:19:06 +0200 | [diff] [blame] | 1940 | group = NFNLGRP_CONNTRACK_EXP_NEW; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1941 | } else |
Pablo Neira Ayuso | e34d5c1 | 2009-06-03 10:32:06 +0200 | [diff] [blame] | 1942 | return 0; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1943 | |
Pablo Neira Ayuso | ebbf41d | 2010-10-19 10:19:06 +0200 | [diff] [blame] | 1944 | if (!item->report && !nfnetlink_has_listeners(net, group)) |
Pablo Neira Ayuso | e34d5c1 | 2009-06-03 10:32:06 +0200 | [diff] [blame] | 1945 | return 0; |
Pablo Neira Ayuso | b3a27bf | 2006-08-22 00:32:05 -0700 | [diff] [blame] | 1946 | |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 1947 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
| 1948 | if (skb == NULL) |
Pablo Neira Ayuso | 150ace0 | 2009-04-17 17:47:31 +0200 | [diff] [blame] | 1949 | goto errout; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1950 | |
Marcus Sundberg | b633ad5 | 2006-02-04 02:11:09 -0800 | [diff] [blame] | 1951 | type |= NFNL_SUBSYS_CTNETLINK_EXP << 8; |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 1952 | nlh = nlmsg_put(skb, item->pid, 0, type, sizeof(*nfmsg), flags); |
| 1953 | if (nlh == NULL) |
| 1954 | goto nlmsg_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1955 | |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 1956 | nfmsg = nlmsg_data(nlh); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1957 | nfmsg->nfgen_family = exp->tuple.src.l3num; |
| 1958 | nfmsg->version = NFNETLINK_V0; |
| 1959 | nfmsg->res_id = 0; |
| 1960 | |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 1961 | rcu_read_lock(); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1962 | if (ctnetlink_exp_dump_expect(skb, exp) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1963 | goto nla_put_failure; |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 1964 | rcu_read_unlock(); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1965 | |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 1966 | nlmsg_end(skb, nlh); |
Pablo Neira Ayuso | ebbf41d | 2010-10-19 10:19:06 +0200 | [diff] [blame] | 1967 | nfnetlink_send(skb, net, item->pid, group, item->report, GFP_ATOMIC); |
Pablo Neira Ayuso | e34d5c1 | 2009-06-03 10:32:06 +0200 | [diff] [blame] | 1968 | return 0; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1969 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1970 | nla_put_failure: |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 1971 | rcu_read_unlock(); |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 1972 | nlmsg_cancel(skb, nlh); |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 1973 | nlmsg_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1974 | kfree_skb(skb); |
Pablo Neira Ayuso | 150ace0 | 2009-04-17 17:47:31 +0200 | [diff] [blame] | 1975 | errout: |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 1976 | nfnetlink_set_err(net, 0, 0, -ENOBUFS); |
Pablo Neira Ayuso | e34d5c1 | 2009-06-03 10:32:06 +0200 | [diff] [blame] | 1977 | return 0; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1978 | } |
| 1979 | #endif |
Patrick McHardy | cf6994c | 2007-07-07 22:32:34 -0700 | [diff] [blame] | 1980 | static int ctnetlink_exp_done(struct netlink_callback *cb) |
| 1981 | { |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 1982 | if (cb->args[1]) |
| 1983 | nf_ct_expect_put((struct nf_conntrack_expect *)cb->args[1]); |
Patrick McHardy | cf6994c | 2007-07-07 22:32:34 -0700 | [diff] [blame] | 1984 | return 0; |
| 1985 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1986 | |
| 1987 | static int |
| 1988 | ctnetlink_exp_dump_table(struct sk_buff *skb, struct netlink_callback *cb) |
| 1989 | { |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 1990 | struct net *net = sock_net(skb->sk); |
Patrick McHardy | cf6994c | 2007-07-07 22:32:34 -0700 | [diff] [blame] | 1991 | struct nf_conntrack_expect *exp, *last; |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 1992 | struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh); |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 1993 | struct hlist_node *n; |
Pablo Neira Ayuso | 87711cb | 2006-01-05 12:19:23 -0800 | [diff] [blame] | 1994 | u_int8_t l3proto = nfmsg->nfgen_family; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1995 | |
Patrick McHardy | 7d0742d | 2008-01-31 04:38:19 -0800 | [diff] [blame] | 1996 | rcu_read_lock(); |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 1997 | last = (struct nf_conntrack_expect *)cb->args[1]; |
| 1998 | for (; cb->args[0] < nf_ct_expect_hsize; cb->args[0]++) { |
Patrick McHardy | cf6994c | 2007-07-07 22:32:34 -0700 | [diff] [blame] | 1999 | restart: |
Alexey Dobriyan | 9b03f38 | 2008-10-08 11:35:03 +0200 | [diff] [blame] | 2000 | hlist_for_each_entry(exp, n, &net->ct.expect_hash[cb->args[0]], |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 2001 | hnode) { |
| 2002 | if (l3proto && exp->tuple.src.l3num != l3proto) |
Patrick McHardy | cf6994c | 2007-07-07 22:32:34 -0700 | [diff] [blame] | 2003 | continue; |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 2004 | if (cb->args[1]) { |
| 2005 | if (exp != last) |
| 2006 | continue; |
| 2007 | cb->args[1] = 0; |
| 2008 | } |
Pablo Neira Ayuso | 8b0a231 | 2009-06-02 20:03:34 +0200 | [diff] [blame] | 2009 | if (ctnetlink_exp_fill_info(skb, |
| 2010 | NETLINK_CB(cb->skb).pid, |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 2011 | cb->nlh->nlmsg_seq, |
| 2012 | IPCTNL_MSG_EXP_NEW, |
Pablo Neira Ayuso | 8b0a231 | 2009-06-02 20:03:34 +0200 | [diff] [blame] | 2013 | exp) < 0) { |
Patrick McHardy | 7d0742d | 2008-01-31 04:38:19 -0800 | [diff] [blame] | 2014 | if (!atomic_inc_not_zero(&exp->use)) |
| 2015 | continue; |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 2016 | cb->args[1] = (unsigned long)exp; |
| 2017 | goto out; |
| 2018 | } |
Patrick McHardy | cf6994c | 2007-07-07 22:32:34 -0700 | [diff] [blame] | 2019 | } |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 2020 | if (cb->args[1]) { |
| 2021 | cb->args[1] = 0; |
| 2022 | goto restart; |
Patrick McHardy | cf6994c | 2007-07-07 22:32:34 -0700 | [diff] [blame] | 2023 | } |
| 2024 | } |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 2025 | out: |
Patrick McHardy | 7d0742d | 2008-01-31 04:38:19 -0800 | [diff] [blame] | 2026 | rcu_read_unlock(); |
Patrick McHardy | cf6994c | 2007-07-07 22:32:34 -0700 | [diff] [blame] | 2027 | if (last) |
| 2028 | nf_ct_expect_put(last); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2029 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2030 | return skb->len; |
| 2031 | } |
| 2032 | |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 2033 | static const struct nla_policy exp_nla_policy[CTA_EXPECT_MAX+1] = { |
Patrick McHardy | d0b0268 | 2010-02-10 15:38:33 +0100 | [diff] [blame] | 2034 | [CTA_EXPECT_MASTER] = { .type = NLA_NESTED }, |
| 2035 | [CTA_EXPECT_TUPLE] = { .type = NLA_NESTED }, |
| 2036 | [CTA_EXPECT_MASK] = { .type = NLA_NESTED }, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 2037 | [CTA_EXPECT_TIMEOUT] = { .type = NLA_U32 }, |
| 2038 | [CTA_EXPECT_ID] = { .type = NLA_U32 }, |
Patrick McHardy | d0b0268 | 2010-02-10 15:38:33 +0100 | [diff] [blame] | 2039 | [CTA_EXPECT_HELP_NAME] = { .type = NLA_NUL_STRING }, |
Pablo Neira Ayuso | bcac0df | 2010-09-22 08:35:36 +0200 | [diff] [blame] | 2040 | [CTA_EXPECT_ZONE] = { .type = NLA_U16 }, |
Pablo Neira Ayuso | 8b008fa | 2010-09-22 08:36:59 +0200 | [diff] [blame] | 2041 | [CTA_EXPECT_FLAGS] = { .type = NLA_U32 }, |
Pablo Neira Ayuso | b8c5e52 | 2012-02-05 03:21:12 +0100 | [diff] [blame] | 2042 | [CTA_EXPECT_CLASS] = { .type = NLA_U32 }, |
Pablo Neira Ayuso | 076a0ca | 2012-02-05 03:41:52 +0100 | [diff] [blame] | 2043 | [CTA_EXPECT_NAT] = { .type = NLA_NESTED }, |
Pablo Neira Ayuso | 544d5c7 | 2012-02-05 03:44:51 +0100 | [diff] [blame] | 2044 | [CTA_EXPECT_FN] = { .type = NLA_NUL_STRING }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2045 | }; |
| 2046 | |
| 2047 | static int |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 2048 | ctnetlink_get_expect(struct sock *ctnl, struct sk_buff *skb, |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 2049 | const struct nlmsghdr *nlh, |
| 2050 | const struct nlattr * const cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2051 | { |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 2052 | struct net *net = sock_net(ctnl); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2053 | struct nf_conntrack_tuple tuple; |
| 2054 | struct nf_conntrack_expect *exp; |
| 2055 | struct sk_buff *skb2; |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 2056 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2057 | u_int8_t u3 = nfmsg->nfgen_family; |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 2058 | u16 zone; |
| 2059 | int err; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2060 | |
David S. Miller | b8f3ab4 | 2011-01-18 12:40:38 -0800 | [diff] [blame] | 2061 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
Pablo Neira Ayuso | 80d326f | 2012-02-24 14:30:15 +0000 | [diff] [blame] | 2062 | struct netlink_dump_control c = { |
| 2063 | .dump = ctnetlink_exp_dump_table, |
| 2064 | .done = ctnetlink_exp_done, |
| 2065 | }; |
| 2066 | return netlink_dump_start(ctnl, skb, nlh, &c); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2067 | } |
| 2068 | |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 2069 | err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone); |
| 2070 | if (err < 0) |
| 2071 | return err; |
| 2072 | |
Pablo Neira Ayuso | 35dba1d | 2011-12-14 12:45:22 +0100 | [diff] [blame] | 2073 | if (cda[CTA_EXPECT_TUPLE]) |
| 2074 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); |
| 2075 | else if (cda[CTA_EXPECT_MASTER]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2076 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_MASTER, u3); |
| 2077 | else |
| 2078 | return -EINVAL; |
| 2079 | |
| 2080 | if (err < 0) |
| 2081 | return err; |
| 2082 | |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 2083 | exp = nf_ct_expect_find_get(net, zone, &tuple); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2084 | if (!exp) |
| 2085 | return -ENOENT; |
| 2086 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2087 | if (cda[CTA_EXPECT_ID]) { |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 2088 | __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]); |
Patrick McHardy | 3583240 | 2007-09-28 14:41:50 -0700 | [diff] [blame] | 2089 | if (ntohl(id) != (u32)(unsigned long)exp) { |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 2090 | nf_ct_expect_put(exp); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2091 | return -ENOENT; |
| 2092 | } |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 2093 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2094 | |
| 2095 | err = -ENOMEM; |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 2096 | skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
Pablo Neira Ayuso | 81378f7 | 2011-12-24 19:03:46 +0100 | [diff] [blame] | 2097 | if (skb2 == NULL) { |
| 2098 | nf_ct_expect_put(exp); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2099 | goto out; |
Pablo Neira Ayuso | 81378f7 | 2011-12-24 19:03:46 +0100 | [diff] [blame] | 2100 | } |
Thomas Graf | 4e9b826 | 2006-11-27 09:25:58 -0800 | [diff] [blame] | 2101 | |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 2102 | rcu_read_lock(); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 2103 | err = ctnetlink_exp_fill_info(skb2, NETLINK_CB(skb).pid, |
Pablo Neira Ayuso | 8b0a231 | 2009-06-02 20:03:34 +0200 | [diff] [blame] | 2104 | nlh->nlmsg_seq, IPCTNL_MSG_EXP_NEW, exp); |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 2105 | rcu_read_unlock(); |
Pablo Neira Ayuso | 81378f7 | 2011-12-24 19:03:46 +0100 | [diff] [blame] | 2106 | nf_ct_expect_put(exp); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2107 | if (err <= 0) |
| 2108 | goto free; |
| 2109 | |
Pablo Neira Ayuso | 81378f7 | 2011-12-24 19:03:46 +0100 | [diff] [blame] | 2110 | err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).pid, MSG_DONTWAIT); |
| 2111 | if (err < 0) |
| 2112 | goto out; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2113 | |
Pablo Neira Ayuso | 81378f7 | 2011-12-24 19:03:46 +0100 | [diff] [blame] | 2114 | return 0; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2115 | |
| 2116 | free: |
| 2117 | kfree_skb(skb2); |
| 2118 | out: |
Pablo Neira Ayuso | 81378f7 | 2011-12-24 19:03:46 +0100 | [diff] [blame] | 2119 | /* this avoids a loop in nfnetlink. */ |
| 2120 | return err == -EAGAIN ? -ENOBUFS : err; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2121 | } |
| 2122 | |
| 2123 | static int |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 2124 | ctnetlink_del_expect(struct sock *ctnl, struct sk_buff *skb, |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 2125 | const struct nlmsghdr *nlh, |
| 2126 | const struct nlattr * const cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2127 | { |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 2128 | struct net *net = sock_net(ctnl); |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 2129 | struct nf_conntrack_expect *exp; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2130 | struct nf_conntrack_tuple tuple; |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 2131 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 2132 | struct hlist_node *n, *next; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2133 | u_int8_t u3 = nfmsg->nfgen_family; |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 2134 | unsigned int i; |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 2135 | u16 zone; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2136 | int err; |
| 2137 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2138 | if (cda[CTA_EXPECT_TUPLE]) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2139 | /* delete a single expect by tuple */ |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 2140 | err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone); |
| 2141 | if (err < 0) |
| 2142 | return err; |
| 2143 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2144 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); |
| 2145 | if (err < 0) |
| 2146 | return err; |
| 2147 | |
| 2148 | /* bump usage count to 2 */ |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 2149 | exp = nf_ct_expect_find_get(net, zone, &tuple); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2150 | if (!exp) |
| 2151 | return -ENOENT; |
| 2152 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2153 | if (cda[CTA_EXPECT_ID]) { |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 2154 | __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]); |
Patrick McHardy | 3583240 | 2007-09-28 14:41:50 -0700 | [diff] [blame] | 2155 | if (ntohl(id) != (u32)(unsigned long)exp) { |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 2156 | nf_ct_expect_put(exp); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2157 | return -ENOENT; |
| 2158 | } |
| 2159 | } |
| 2160 | |
| 2161 | /* after list removal, usage count == 1 */ |
Pablo Neira Ayuso | ebbf41d | 2010-10-19 10:19:06 +0200 | [diff] [blame] | 2162 | spin_lock_bh(&nf_conntrack_lock); |
| 2163 | if (del_timer(&exp->timeout)) { |
| 2164 | nf_ct_unlink_expect_report(exp, NETLINK_CB(skb).pid, |
| 2165 | nlmsg_report(nlh)); |
| 2166 | nf_ct_expect_put(exp); |
| 2167 | } |
| 2168 | spin_unlock_bh(&nf_conntrack_lock); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 2169 | /* have to put what we 'get' above. |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2170 | * after this line usage count == 0 */ |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 2171 | nf_ct_expect_put(exp); |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2172 | } else if (cda[CTA_EXPECT_HELP_NAME]) { |
| 2173 | char *name = nla_data(cda[CTA_EXPECT_HELP_NAME]); |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 2174 | struct nf_conn_help *m_help; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2175 | |
| 2176 | /* delete all expectations for this helper */ |
Patrick McHardy | f8ba1af | 2008-01-31 04:38:58 -0800 | [diff] [blame] | 2177 | spin_lock_bh(&nf_conntrack_lock); |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 2178 | for (i = 0; i < nf_ct_expect_hsize; i++) { |
| 2179 | hlist_for_each_entry_safe(exp, n, next, |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 2180 | &net->ct.expect_hash[i], |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 2181 | hnode) { |
| 2182 | m_help = nfct_help(exp->master); |
Patrick McHardy | 794e687 | 2010-02-03 13:41:29 +0100 | [diff] [blame] | 2183 | if (!strcmp(m_help->helper->name, name) && |
| 2184 | del_timer(&exp->timeout)) { |
Pablo Neira Ayuso | ebbf41d | 2010-10-19 10:19:06 +0200 | [diff] [blame] | 2185 | nf_ct_unlink_expect_report(exp, |
| 2186 | NETLINK_CB(skb).pid, |
| 2187 | nlmsg_report(nlh)); |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 2188 | nf_ct_expect_put(exp); |
| 2189 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2190 | } |
| 2191 | } |
Patrick McHardy | f8ba1af | 2008-01-31 04:38:58 -0800 | [diff] [blame] | 2192 | spin_unlock_bh(&nf_conntrack_lock); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2193 | } else { |
| 2194 | /* This basically means we have to flush everything*/ |
Patrick McHardy | f8ba1af | 2008-01-31 04:38:58 -0800 | [diff] [blame] | 2195 | spin_lock_bh(&nf_conntrack_lock); |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 2196 | for (i = 0; i < nf_ct_expect_hsize; i++) { |
| 2197 | hlist_for_each_entry_safe(exp, n, next, |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 2198 | &net->ct.expect_hash[i], |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 2199 | hnode) { |
| 2200 | if (del_timer(&exp->timeout)) { |
Pablo Neira Ayuso | ebbf41d | 2010-10-19 10:19:06 +0200 | [diff] [blame] | 2201 | nf_ct_unlink_expect_report(exp, |
| 2202 | NETLINK_CB(skb).pid, |
| 2203 | nlmsg_report(nlh)); |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 2204 | nf_ct_expect_put(exp); |
| 2205 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2206 | } |
| 2207 | } |
Patrick McHardy | f8ba1af | 2008-01-31 04:38:58 -0800 | [diff] [blame] | 2208 | spin_unlock_bh(&nf_conntrack_lock); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2209 | } |
| 2210 | |
| 2211 | return 0; |
| 2212 | } |
| 2213 | static int |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 2214 | ctnetlink_change_expect(struct nf_conntrack_expect *x, |
| 2215 | const struct nlattr * const cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2216 | { |
Kelvie Wong | 9768e1a | 2012-05-02 14:39:24 +0000 | [diff] [blame] | 2217 | if (cda[CTA_EXPECT_TIMEOUT]) { |
| 2218 | if (!del_timer(&x->timeout)) |
| 2219 | return -ETIME; |
| 2220 | |
| 2221 | x->timeout.expires = jiffies + |
| 2222 | ntohl(nla_get_be32(cda[CTA_EXPECT_TIMEOUT])) * HZ; |
| 2223 | add_timer(&x->timeout); |
| 2224 | } |
| 2225 | return 0; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2226 | } |
| 2227 | |
Pablo Neira Ayuso | 076a0ca | 2012-02-05 03:41:52 +0100 | [diff] [blame] | 2228 | static const struct nla_policy exp_nat_nla_policy[CTA_EXPECT_NAT_MAX+1] = { |
| 2229 | [CTA_EXPECT_NAT_DIR] = { .type = NLA_U32 }, |
| 2230 | [CTA_EXPECT_NAT_TUPLE] = { .type = NLA_NESTED }, |
| 2231 | }; |
| 2232 | |
| 2233 | static int |
| 2234 | ctnetlink_parse_expect_nat(const struct nlattr *attr, |
| 2235 | struct nf_conntrack_expect *exp, |
| 2236 | u_int8_t u3) |
| 2237 | { |
| 2238 | #ifdef CONFIG_NF_NAT_NEEDED |
| 2239 | struct nlattr *tb[CTA_EXPECT_NAT_MAX+1]; |
| 2240 | struct nf_conntrack_tuple nat_tuple = {}; |
| 2241 | int err; |
| 2242 | |
| 2243 | nla_parse_nested(tb, CTA_EXPECT_NAT_MAX, attr, exp_nat_nla_policy); |
| 2244 | |
| 2245 | if (!tb[CTA_EXPECT_NAT_DIR] || !tb[CTA_EXPECT_NAT_TUPLE]) |
| 2246 | return -EINVAL; |
| 2247 | |
| 2248 | err = ctnetlink_parse_tuple((const struct nlattr * const *)tb, |
| 2249 | &nat_tuple, CTA_EXPECT_NAT_TUPLE, u3); |
| 2250 | if (err < 0) |
| 2251 | return err; |
| 2252 | |
| 2253 | exp->saved_ip = nat_tuple.src.u3.ip; |
| 2254 | exp->saved_proto = nat_tuple.src.u; |
| 2255 | exp->dir = ntohl(nla_get_be32(tb[CTA_EXPECT_NAT_DIR])); |
| 2256 | |
| 2257 | return 0; |
| 2258 | #else |
| 2259 | return -EOPNOTSUPP; |
| 2260 | #endif |
| 2261 | } |
| 2262 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2263 | static int |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 2264 | ctnetlink_create_expect(struct net *net, u16 zone, |
| 2265 | const struct nlattr * const cda[], |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 2266 | u_int8_t u3, |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 2267 | u32 pid, int report) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2268 | { |
| 2269 | struct nf_conntrack_tuple tuple, mask, master_tuple; |
| 2270 | struct nf_conntrack_tuple_hash *h = NULL; |
| 2271 | struct nf_conntrack_expect *exp; |
| 2272 | struct nf_conn *ct; |
Harald Welte | dc808fe | 2006-03-20 17:56:32 -0800 | [diff] [blame] | 2273 | struct nf_conn_help *help; |
Pablo Neira Ayuso | 660fdb2 | 2012-02-05 02:34:16 +0100 | [diff] [blame] | 2274 | struct nf_conntrack_helper *helper = NULL; |
Pablo Neira Ayuso | b8c5e52 | 2012-02-05 03:21:12 +0100 | [diff] [blame] | 2275 | u_int32_t class = 0; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2276 | int err = 0; |
| 2277 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2278 | /* caller guarantees that those three CTA_EXPECT_* exist */ |
| 2279 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); |
| 2280 | if (err < 0) |
| 2281 | return err; |
| 2282 | err = ctnetlink_parse_tuple(cda, &mask, CTA_EXPECT_MASK, u3); |
| 2283 | if (err < 0) |
| 2284 | return err; |
| 2285 | err = ctnetlink_parse_tuple(cda, &master_tuple, CTA_EXPECT_MASTER, u3); |
| 2286 | if (err < 0) |
| 2287 | return err; |
| 2288 | |
| 2289 | /* Look for master conntrack of this expectation */ |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 2290 | h = nf_conntrack_find_get(net, zone, &master_tuple); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2291 | if (!h) |
| 2292 | return -ENOENT; |
| 2293 | ct = nf_ct_tuplehash_to_ctrack(h); |
Pablo Neira Ayuso | 660fdb2 | 2012-02-05 02:34:16 +0100 | [diff] [blame] | 2294 | |
| 2295 | /* Look for helper of this expectation */ |
| 2296 | if (cda[CTA_EXPECT_HELP_NAME]) { |
| 2297 | const char *helpname = nla_data(cda[CTA_EXPECT_HELP_NAME]); |
| 2298 | |
| 2299 | helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct), |
| 2300 | nf_ct_protonum(ct)); |
| 2301 | if (helper == NULL) { |
| 2302 | #ifdef CONFIG_MODULES |
| 2303 | if (request_module("nfct-helper-%s", helpname) < 0) { |
| 2304 | err = -EOPNOTSUPP; |
| 2305 | goto out; |
| 2306 | } |
| 2307 | |
| 2308 | helper = __nf_conntrack_helper_find(helpname, |
| 2309 | nf_ct_l3num(ct), |
| 2310 | nf_ct_protonum(ct)); |
| 2311 | if (helper) { |
| 2312 | err = -EAGAIN; |
| 2313 | goto out; |
| 2314 | } |
| 2315 | #endif |
| 2316 | err = -EOPNOTSUPP; |
| 2317 | goto out; |
| 2318 | } |
| 2319 | } |
| 2320 | |
Pablo Neira Ayuso | b8c5e52 | 2012-02-05 03:21:12 +0100 | [diff] [blame] | 2321 | if (cda[CTA_EXPECT_CLASS] && helper) { |
| 2322 | class = ntohl(nla_get_be32(cda[CTA_EXPECT_CLASS])); |
| 2323 | if (class > helper->expect_class_max) { |
| 2324 | err = -EINVAL; |
| 2325 | goto out; |
| 2326 | } |
| 2327 | } |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 2328 | exp = nf_ct_expect_alloc(ct); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2329 | if (!exp) { |
| 2330 | err = -ENOMEM; |
| 2331 | goto out; |
| 2332 | } |
Pablo Neira Ayuso | bc01befd | 2010-09-28 21:06:34 +0200 | [diff] [blame] | 2333 | help = nfct_help(ct); |
| 2334 | if (!help) { |
| 2335 | if (!cda[CTA_EXPECT_TIMEOUT]) { |
| 2336 | err = -EINVAL; |
| 2337 | goto out; |
| 2338 | } |
| 2339 | exp->timeout.expires = |
| 2340 | jiffies + ntohl(nla_get_be32(cda[CTA_EXPECT_TIMEOUT])) * HZ; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 2341 | |
Pablo Neira Ayuso | bc01befd | 2010-09-28 21:06:34 +0200 | [diff] [blame] | 2342 | exp->flags = NF_CT_EXPECT_USERSPACE; |
| 2343 | if (cda[CTA_EXPECT_FLAGS]) { |
| 2344 | exp->flags |= |
| 2345 | ntohl(nla_get_be32(cda[CTA_EXPECT_FLAGS])); |
| 2346 | } |
| 2347 | } else { |
| 2348 | if (cda[CTA_EXPECT_FLAGS]) { |
| 2349 | exp->flags = ntohl(nla_get_be32(cda[CTA_EXPECT_FLAGS])); |
| 2350 | exp->flags &= ~NF_CT_EXPECT_USERSPACE; |
| 2351 | } else |
| 2352 | exp->flags = 0; |
| 2353 | } |
Pablo Neira Ayuso | 544d5c7 | 2012-02-05 03:44:51 +0100 | [diff] [blame] | 2354 | if (cda[CTA_EXPECT_FN]) { |
| 2355 | const char *name = nla_data(cda[CTA_EXPECT_FN]); |
| 2356 | struct nf_ct_helper_expectfn *expfn; |
| 2357 | |
| 2358 | expfn = nf_ct_helper_expectfn_find_by_name(name); |
| 2359 | if (expfn == NULL) { |
| 2360 | err = -EINVAL; |
| 2361 | goto err_out; |
| 2362 | } |
| 2363 | exp->expectfn = expfn->expectfn; |
| 2364 | } else |
| 2365 | exp->expectfn = NULL; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2366 | |
Pablo Neira Ayuso | b8c5e52 | 2012-02-05 03:21:12 +0100 | [diff] [blame] | 2367 | exp->class = class; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2368 | exp->master = ct; |
Pablo Neira Ayuso | 660fdb2 | 2012-02-05 02:34:16 +0100 | [diff] [blame] | 2369 | exp->helper = helper; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2370 | memcpy(&exp->tuple, &tuple, sizeof(struct nf_conntrack_tuple)); |
Patrick McHardy | d4156e8 | 2007-07-07 22:31:32 -0700 | [diff] [blame] | 2371 | memcpy(&exp->mask.src.u3, &mask.src.u3, sizeof(exp->mask.src.u3)); |
| 2372 | exp->mask.src.u.all = mask.src.u.all; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2373 | |
Pablo Neira Ayuso | 076a0ca | 2012-02-05 03:41:52 +0100 | [diff] [blame] | 2374 | if (cda[CTA_EXPECT_NAT]) { |
| 2375 | err = ctnetlink_parse_expect_nat(cda[CTA_EXPECT_NAT], |
| 2376 | exp, u3); |
| 2377 | if (err < 0) |
| 2378 | goto err_out; |
| 2379 | } |
Pablo Neira Ayuso | 19abb7b | 2008-11-18 11:56:20 +0100 | [diff] [blame] | 2380 | err = nf_ct_expect_related_report(exp, pid, report); |
Pablo Neira Ayuso | 076a0ca | 2012-02-05 03:41:52 +0100 | [diff] [blame] | 2381 | err_out: |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 2382 | nf_ct_expect_put(exp); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 2383 | out: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2384 | nf_ct_put(nf_ct_tuplehash_to_ctrack(h)); |
| 2385 | return err; |
| 2386 | } |
| 2387 | |
| 2388 | static int |
| 2389 | ctnetlink_new_expect(struct sock *ctnl, struct sk_buff *skb, |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 2390 | const struct nlmsghdr *nlh, |
| 2391 | const struct nlattr * const cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2392 | { |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 2393 | struct net *net = sock_net(ctnl); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2394 | struct nf_conntrack_tuple tuple; |
| 2395 | struct nf_conntrack_expect *exp; |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 2396 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2397 | u_int8_t u3 = nfmsg->nfgen_family; |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 2398 | u16 zone; |
| 2399 | int err; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2400 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2401 | if (!cda[CTA_EXPECT_TUPLE] |
| 2402 | || !cda[CTA_EXPECT_MASK] |
| 2403 | || !cda[CTA_EXPECT_MASTER]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2404 | return -EINVAL; |
| 2405 | |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 2406 | err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone); |
| 2407 | if (err < 0) |
| 2408 | return err; |
| 2409 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2410 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); |
| 2411 | if (err < 0) |
| 2412 | return err; |
| 2413 | |
Patrick McHardy | f8ba1af | 2008-01-31 04:38:58 -0800 | [diff] [blame] | 2414 | spin_lock_bh(&nf_conntrack_lock); |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 2415 | exp = __nf_ct_expect_find(net, zone, &tuple); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2416 | |
| 2417 | if (!exp) { |
Patrick McHardy | f8ba1af | 2008-01-31 04:38:58 -0800 | [diff] [blame] | 2418 | spin_unlock_bh(&nf_conntrack_lock); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2419 | err = -ENOENT; |
Pablo Neira Ayuso | 19abb7b | 2008-11-18 11:56:20 +0100 | [diff] [blame] | 2420 | if (nlh->nlmsg_flags & NLM_F_CREATE) { |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 2421 | err = ctnetlink_create_expect(net, zone, cda, |
Pablo Neira Ayuso | 19abb7b | 2008-11-18 11:56:20 +0100 | [diff] [blame] | 2422 | u3, |
| 2423 | NETLINK_CB(skb).pid, |
| 2424 | nlmsg_report(nlh)); |
| 2425 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2426 | return err; |
| 2427 | } |
| 2428 | |
| 2429 | err = -EEXIST; |
| 2430 | if (!(nlh->nlmsg_flags & NLM_F_EXCL)) |
| 2431 | err = ctnetlink_change_expect(exp, cda); |
Patrick McHardy | f8ba1af | 2008-01-31 04:38:58 -0800 | [diff] [blame] | 2432 | spin_unlock_bh(&nf_conntrack_lock); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2433 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2434 | return err; |
| 2435 | } |
| 2436 | |
| 2437 | #ifdef CONFIG_NF_CONNTRACK_EVENTS |
Pablo Neira Ayuso | e34d5c1 | 2009-06-03 10:32:06 +0200 | [diff] [blame] | 2438 | static struct nf_ct_event_notifier ctnl_notifier = { |
| 2439 | .fcn = ctnetlink_conntrack_event, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2440 | }; |
| 2441 | |
Pablo Neira Ayuso | e34d5c1 | 2009-06-03 10:32:06 +0200 | [diff] [blame] | 2442 | static struct nf_exp_event_notifier ctnl_notifier_exp = { |
| 2443 | .fcn = ctnetlink_expect_event, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2444 | }; |
| 2445 | #endif |
| 2446 | |
Patrick McHardy | 7c8d4cb | 2007-09-28 14:15:45 -0700 | [diff] [blame] | 2447 | static const struct nfnl_callback ctnl_cb[IPCTNL_MSG_MAX] = { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2448 | [IPCTNL_MSG_CT_NEW] = { .call = ctnetlink_new_conntrack, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 2449 | .attr_count = CTA_MAX, |
| 2450 | .policy = ct_nla_policy }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2451 | [IPCTNL_MSG_CT_GET] = { .call = ctnetlink_get_conntrack, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 2452 | .attr_count = CTA_MAX, |
| 2453 | .policy = ct_nla_policy }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2454 | [IPCTNL_MSG_CT_DELETE] = { .call = ctnetlink_del_conntrack, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 2455 | .attr_count = CTA_MAX, |
| 2456 | .policy = ct_nla_policy }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2457 | [IPCTNL_MSG_CT_GET_CTRZERO] = { .call = ctnetlink_get_conntrack, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 2458 | .attr_count = CTA_MAX, |
| 2459 | .policy = ct_nla_policy }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2460 | }; |
| 2461 | |
Patrick McHardy | 7c8d4cb | 2007-09-28 14:15:45 -0700 | [diff] [blame] | 2462 | 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] | 2463 | [IPCTNL_MSG_EXP_GET] = { .call = ctnetlink_get_expect, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 2464 | .attr_count = CTA_EXPECT_MAX, |
| 2465 | .policy = exp_nla_policy }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2466 | [IPCTNL_MSG_EXP_NEW] = { .call = ctnetlink_new_expect, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 2467 | .attr_count = CTA_EXPECT_MAX, |
| 2468 | .policy = exp_nla_policy }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2469 | [IPCTNL_MSG_EXP_DELETE] = { .call = ctnetlink_del_expect, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 2470 | .attr_count = CTA_EXPECT_MAX, |
| 2471 | .policy = exp_nla_policy }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2472 | }; |
| 2473 | |
Patrick McHardy | 7c8d4cb | 2007-09-28 14:15:45 -0700 | [diff] [blame] | 2474 | static const struct nfnetlink_subsystem ctnl_subsys = { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2475 | .name = "conntrack", |
| 2476 | .subsys_id = NFNL_SUBSYS_CTNETLINK, |
| 2477 | .cb_count = IPCTNL_MSG_MAX, |
| 2478 | .cb = ctnl_cb, |
| 2479 | }; |
| 2480 | |
Patrick McHardy | 7c8d4cb | 2007-09-28 14:15:45 -0700 | [diff] [blame] | 2481 | static const struct nfnetlink_subsystem ctnl_exp_subsys = { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2482 | .name = "conntrack_expect", |
| 2483 | .subsys_id = NFNL_SUBSYS_CTNETLINK_EXP, |
| 2484 | .cb_count = IPCTNL_MSG_EXP_MAX, |
| 2485 | .cb = ctnl_exp_cb, |
| 2486 | }; |
| 2487 | |
Patrick McHardy | d2483dd | 2006-12-02 22:06:05 -0800 | [diff] [blame] | 2488 | MODULE_ALIAS("ip_conntrack_netlink"); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2489 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK); |
Pablo Neira Ayuso | 34f9a2e | 2006-02-04 02:11:41 -0800 | [diff] [blame] | 2490 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK_EXP); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2491 | |
Pablo Neira Ayuso | 70e9942 | 2011-11-22 00:16:51 +0100 | [diff] [blame] | 2492 | static int __net_init ctnetlink_net_init(struct net *net) |
| 2493 | { |
| 2494 | #ifdef CONFIG_NF_CONNTRACK_EVENTS |
| 2495 | int ret; |
| 2496 | |
| 2497 | ret = nf_conntrack_register_notifier(net, &ctnl_notifier); |
| 2498 | if (ret < 0) { |
| 2499 | pr_err("ctnetlink_init: cannot register notifier.\n"); |
| 2500 | goto err_out; |
| 2501 | } |
| 2502 | |
| 2503 | ret = nf_ct_expect_register_notifier(net, &ctnl_notifier_exp); |
| 2504 | if (ret < 0) { |
| 2505 | pr_err("ctnetlink_init: cannot expect register notifier.\n"); |
| 2506 | goto err_unreg_notifier; |
| 2507 | } |
| 2508 | #endif |
| 2509 | return 0; |
| 2510 | |
| 2511 | #ifdef CONFIG_NF_CONNTRACK_EVENTS |
| 2512 | err_unreg_notifier: |
| 2513 | nf_conntrack_unregister_notifier(net, &ctnl_notifier); |
| 2514 | err_out: |
| 2515 | return ret; |
| 2516 | #endif |
| 2517 | } |
| 2518 | |
| 2519 | static void ctnetlink_net_exit(struct net *net) |
| 2520 | { |
| 2521 | #ifdef CONFIG_NF_CONNTRACK_EVENTS |
| 2522 | nf_ct_expect_unregister_notifier(net, &ctnl_notifier_exp); |
| 2523 | nf_conntrack_unregister_notifier(net, &ctnl_notifier); |
| 2524 | #endif |
| 2525 | } |
| 2526 | |
| 2527 | static void __net_exit ctnetlink_net_exit_batch(struct list_head *net_exit_list) |
| 2528 | { |
| 2529 | struct net *net; |
| 2530 | |
| 2531 | list_for_each_entry(net, net_exit_list, exit_list) |
| 2532 | ctnetlink_net_exit(net); |
| 2533 | } |
| 2534 | |
| 2535 | static struct pernet_operations ctnetlink_net_ops = { |
| 2536 | .init = ctnetlink_net_init, |
| 2537 | .exit_batch = ctnetlink_net_exit_batch, |
| 2538 | }; |
| 2539 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2540 | static int __init ctnetlink_init(void) |
| 2541 | { |
| 2542 | int ret; |
| 2543 | |
Stephen Hemminger | 654d0fb | 2010-05-13 15:02:08 +0200 | [diff] [blame] | 2544 | pr_info("ctnetlink v%s: registering with nfnetlink.\n", version); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2545 | ret = nfnetlink_subsys_register(&ctnl_subsys); |
| 2546 | if (ret < 0) { |
Stephen Hemminger | 654d0fb | 2010-05-13 15:02:08 +0200 | [diff] [blame] | 2547 | pr_err("ctnetlink_init: cannot register with nfnetlink.\n"); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2548 | goto err_out; |
| 2549 | } |
| 2550 | |
| 2551 | ret = nfnetlink_subsys_register(&ctnl_exp_subsys); |
| 2552 | if (ret < 0) { |
Stephen Hemminger | 654d0fb | 2010-05-13 15:02:08 +0200 | [diff] [blame] | 2553 | pr_err("ctnetlink_init: cannot register exp with nfnetlink.\n"); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2554 | goto err_unreg_subsys; |
| 2555 | } |
| 2556 | |
Pablo Neira Ayuso | 70e9942 | 2011-11-22 00:16:51 +0100 | [diff] [blame] | 2557 | if (register_pernet_subsys(&ctnetlink_net_ops)) { |
| 2558 | pr_err("ctnetlink_init: cannot register pernet operations\n"); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2559 | goto err_unreg_exp_subsys; |
| 2560 | } |
Pablo Neira Ayuso | 9cb0176 | 2012-06-07 12:13:39 +0200 | [diff] [blame^] | 2561 | #if defined(CONFIG_NETFILTER_NETLINK_QUEUE) || \ |
| 2562 | defined(CONFIG_NETFILTER_NETLINK_QUEUE_MODULE) |
| 2563 | /* setup interaction between nf_queue and nf_conntrack_netlink. */ |
| 2564 | RCU_INIT_POINTER(nfq_ct_hook, &ctnetlink_nfqueue_hook); |
| 2565 | #endif |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2566 | return 0; |
| 2567 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2568 | err_unreg_exp_subsys: |
| 2569 | nfnetlink_subsys_unregister(&ctnl_exp_subsys); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2570 | err_unreg_subsys: |
| 2571 | nfnetlink_subsys_unregister(&ctnl_subsys); |
| 2572 | err_out: |
| 2573 | return ret; |
| 2574 | } |
| 2575 | |
| 2576 | static void __exit ctnetlink_exit(void) |
| 2577 | { |
Stephen Hemminger | 654d0fb | 2010-05-13 15:02:08 +0200 | [diff] [blame] | 2578 | pr_info("ctnetlink: unregistering from nfnetlink.\n"); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2579 | |
Pablo Neira Ayuso | 70e9942 | 2011-11-22 00:16:51 +0100 | [diff] [blame] | 2580 | unregister_pernet_subsys(&ctnetlink_net_ops); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2581 | nfnetlink_subsys_unregister(&ctnl_exp_subsys); |
| 2582 | nfnetlink_subsys_unregister(&ctnl_subsys); |
Pablo Neira Ayuso | 9cb0176 | 2012-06-07 12:13:39 +0200 | [diff] [blame^] | 2583 | #if defined(CONFIG_NETFILTER_NETLINK_QUEUE) || \ |
| 2584 | defined(CONFIG_NETFILTER_NETLINK_QUEUE_MODULE) |
| 2585 | RCU_INIT_POINTER(nfq_ct_hook, NULL); |
| 2586 | #endif |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2587 | } |
| 2588 | |
| 2589 | module_init(ctnetlink_init); |
| 2590 | module_exit(ctnetlink_exit); |