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 | 392025f | 2012-06-26 20:27:09 +0200 | [diff] [blame] | 7 | * (C) 2005-2012 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> |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 40 | #include <net/netfilter/nf_conntrack_seqadj.h> |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 41 | #include <net/netfilter/nf_conntrack_l3proto.h> |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 42 | #include <net/netfilter/nf_conntrack_l4proto.h> |
Jozsef Kadlecsik | 5b1158e | 2006-12-02 22:07:13 -0800 | [diff] [blame] | 43 | #include <net/netfilter/nf_conntrack_tuple.h> |
Krzysztof Piotr Oledzki | 5840157 | 2008-07-21 10:01:34 -0700 | [diff] [blame] | 44 | #include <net/netfilter/nf_conntrack_acct.h> |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 45 | #include <net/netfilter/nf_conntrack_zones.h> |
Pablo Neira Ayuso | a992ca2 | 2011-01-19 16:00:07 +0100 | [diff] [blame] | 46 | #include <net/netfilter/nf_conntrack_timestamp.h> |
Florian Westphal | c539f01 | 2013-01-11 06:30:44 +0000 | [diff] [blame] | 47 | #include <net/netfilter/nf_conntrack_labels.h> |
Jozsef Kadlecsik | 5b1158e | 2006-12-02 22:07:13 -0800 | [diff] [blame] | 48 | #ifdef CONFIG_NF_NAT_NEEDED |
| 49 | #include <net/netfilter/nf_nat_core.h> |
Patrick McHardy | c7232c9 | 2012-08-26 19:14:06 +0200 | [diff] [blame] | 50 | #include <net/netfilter/nf_nat_l4proto.h> |
Pablo Neira Ayuso | 8c88f87 | 2012-06-07 13:31:25 +0200 | [diff] [blame] | 51 | #include <net/netfilter/nf_nat_helper.h> |
Jozsef Kadlecsik | 5b1158e | 2006-12-02 22:07:13 -0800 | [diff] [blame] | 52 | #endif |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 53 | |
| 54 | #include <linux/netfilter/nfnetlink.h> |
| 55 | #include <linux/netfilter/nfnetlink_conntrack.h> |
| 56 | |
| 57 | MODULE_LICENSE("GPL"); |
| 58 | |
Harald Welte | dc808fe | 2006-03-20 17:56:32 -0800 | [diff] [blame] | 59 | static char __initdata version[] = "0.93"; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 60 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 61 | static inline int |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 62 | ctnetlink_dump_tuples_proto(struct sk_buff *skb, |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 63 | const struct nf_conntrack_tuple *tuple, |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 64 | struct nf_conntrack_l4proto *l4proto) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 65 | { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 66 | int ret = 0; |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 67 | struct nlattr *nest_parms; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 68 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 69 | nest_parms = nla_nest_start(skb, CTA_TUPLE_PROTO | NLA_F_NESTED); |
| 70 | if (!nest_parms) |
| 71 | goto nla_put_failure; |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 72 | if (nla_put_u8(skb, CTA_PROTO_NUM, tuple->dst.protonum)) |
| 73 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 74 | |
Patrick McHardy | fdf7083 | 2007-09-28 14:37:41 -0700 | [diff] [blame] | 75 | if (likely(l4proto->tuple_to_nlattr)) |
| 76 | ret = l4proto->tuple_to_nlattr(skb, tuple); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 77 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 78 | nla_nest_end(skb, nest_parms); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 79 | |
| 80 | return ret; |
| 81 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 82 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 83 | return -1; |
| 84 | } |
| 85 | |
| 86 | static inline int |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 87 | ctnetlink_dump_tuples_ip(struct sk_buff *skb, |
| 88 | const struct nf_conntrack_tuple *tuple, |
| 89 | struct nf_conntrack_l3proto *l3proto) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 90 | { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 91 | int ret = 0; |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 92 | struct nlattr *nest_parms; |
| 93 | |
| 94 | nest_parms = nla_nest_start(skb, CTA_TUPLE_IP | NLA_F_NESTED); |
| 95 | if (!nest_parms) |
| 96 | goto nla_put_failure; |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 97 | |
Patrick McHardy | fdf7083 | 2007-09-28 14:37:41 -0700 | [diff] [blame] | 98 | if (likely(l3proto->tuple_to_nlattr)) |
| 99 | ret = l3proto->tuple_to_nlattr(skb, tuple); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 100 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 101 | nla_nest_end(skb, nest_parms); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 102 | |
| 103 | return ret; |
| 104 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 105 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 106 | return -1; |
| 107 | } |
| 108 | |
Ilpo Järvinen | bb5cf80 | 2008-01-05 23:11:31 -0800 | [diff] [blame] | 109 | static int |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 110 | ctnetlink_dump_tuples(struct sk_buff *skb, |
| 111 | const struct nf_conntrack_tuple *tuple) |
| 112 | { |
| 113 | int ret; |
| 114 | struct nf_conntrack_l3proto *l3proto; |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 115 | struct nf_conntrack_l4proto *l4proto; |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 116 | |
Hans Schillstrom | 3b988ec | 2012-03-05 02:24:29 +0000 | [diff] [blame] | 117 | rcu_read_lock(); |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 118 | l3proto = __nf_ct_l3proto_find(tuple->src.l3num); |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 119 | ret = ctnetlink_dump_tuples_ip(skb, tuple, l3proto); |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 120 | |
Hans Schillstrom | 3b988ec | 2012-03-05 02:24:29 +0000 | [diff] [blame] | 121 | if (ret >= 0) { |
| 122 | l4proto = __nf_ct_l4proto_find(tuple->src.l3num, |
| 123 | tuple->dst.protonum); |
| 124 | ret = ctnetlink_dump_tuples_proto(skb, tuple, l4proto); |
| 125 | } |
| 126 | rcu_read_unlock(); |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 127 | return ret; |
| 128 | } |
| 129 | |
| 130 | static inline int |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 131 | ctnetlink_dump_status(struct sk_buff *skb, const struct nf_conn *ct) |
| 132 | { |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 133 | if (nla_put_be32(skb, CTA_STATUS, htonl(ct->status))) |
| 134 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 135 | return 0; |
| 136 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 137 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 138 | return -1; |
| 139 | } |
| 140 | |
| 141 | static inline int |
| 142 | ctnetlink_dump_timeout(struct sk_buff *skb, const struct nf_conn *ct) |
| 143 | { |
Xi Wang | c121638 | 2011-12-30 10:40:17 -0500 | [diff] [blame] | 144 | long timeout = ((long)ct->timeout.expires - (long)jiffies) / HZ; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 145 | |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 146 | if (timeout < 0) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 147 | timeout = 0; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 148 | |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 149 | if (nla_put_be32(skb, CTA_TIMEOUT, htonl(timeout))) |
| 150 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 151 | return 0; |
| 152 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 153 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 154 | return -1; |
| 155 | } |
| 156 | |
| 157 | static inline int |
Patrick McHardy | 440f0d5 | 2009-06-10 14:32:47 +0200 | [diff] [blame] | 158 | ctnetlink_dump_protoinfo(struct sk_buff *skb, struct nf_conn *ct) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 159 | { |
Patrick McHardy | 5e8fbe2 | 2008-04-14 11:15:52 +0200 | [diff] [blame] | 160 | struct nf_conntrack_l4proto *l4proto; |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 161 | struct nlattr *nest_proto; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 162 | int ret; |
| 163 | |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 164 | l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct)); |
| 165 | if (!l4proto->to_nlattr) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 166 | return 0; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 167 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 168 | nest_proto = nla_nest_start(skb, CTA_PROTOINFO | NLA_F_NESTED); |
| 169 | if (!nest_proto) |
| 170 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 171 | |
Patrick McHardy | fdf7083 | 2007-09-28 14:37:41 -0700 | [diff] [blame] | 172 | ret = l4proto->to_nlattr(skb, nest_proto, ct); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 173 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 174 | nla_nest_end(skb, nest_proto); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 175 | |
| 176 | return ret; |
| 177 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 178 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 179 | return -1; |
| 180 | } |
| 181 | |
| 182 | static inline int |
| 183 | ctnetlink_dump_helpinfo(struct sk_buff *skb, const struct nf_conn *ct) |
| 184 | { |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 185 | struct nlattr *nest_helper; |
Harald Welte | dc808fe | 2006-03-20 17:56:32 -0800 | [diff] [blame] | 186 | const struct nf_conn_help *help = nfct_help(ct); |
Patrick McHarrdy | 3c158f7 | 2007-06-05 12:55:27 -0700 | [diff] [blame] | 187 | struct nf_conntrack_helper *helper; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 188 | |
Patrick McHarrdy | 3c158f7 | 2007-06-05 12:55:27 -0700 | [diff] [blame] | 189 | if (!help) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 190 | return 0; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 191 | |
Patrick McHarrdy | 3c158f7 | 2007-06-05 12:55:27 -0700 | [diff] [blame] | 192 | helper = rcu_dereference(help->helper); |
| 193 | if (!helper) |
| 194 | goto out; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 195 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 196 | nest_helper = nla_nest_start(skb, CTA_HELP | NLA_F_NESTED); |
| 197 | if (!nest_helper) |
| 198 | goto nla_put_failure; |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 199 | if (nla_put_string(skb, CTA_HELP_NAME, helper->name)) |
| 200 | goto nla_put_failure; |
Patrick McHarrdy | 3c158f7 | 2007-06-05 12:55:27 -0700 | [diff] [blame] | 201 | |
Patrick McHardy | fdf7083 | 2007-09-28 14:37:41 -0700 | [diff] [blame] | 202 | if (helper->to_nlattr) |
| 203 | helper->to_nlattr(skb, ct); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 204 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 205 | nla_nest_end(skb, nest_helper); |
Patrick McHarrdy | 3c158f7 | 2007-06-05 12:55:27 -0700 | [diff] [blame] | 206 | out: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 207 | return 0; |
| 208 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 209 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 210 | return -1; |
| 211 | } |
| 212 | |
Ilpo Järvinen | bb5cf80 | 2008-01-05 23:11:31 -0800 | [diff] [blame] | 213 | static int |
Holger Eitzenberger | 4542fa4 | 2013-09-26 17:31:52 +0200 | [diff] [blame] | 214 | dump_counters(struct sk_buff *skb, struct nf_conn_acct *acct, |
| 215 | enum ip_conntrack_dir dir, int type) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 216 | { |
Holger Eitzenberger | 4542fa4 | 2013-09-26 17:31:52 +0200 | [diff] [blame] | 217 | enum ctattr_type attr = dir ? CTA_COUNTERS_REPLY: CTA_COUNTERS_ORIG; |
| 218 | struct nf_conn_counter *counter = acct->counter; |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 219 | struct nlattr *nest_count; |
Holger Eitzenberger | 4542fa4 | 2013-09-26 17:31:52 +0200 | [diff] [blame] | 220 | u64 pkts, bytes; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 221 | |
Holger Eitzenberger | 4542fa4 | 2013-09-26 17:31:52 +0200 | [diff] [blame] | 222 | if (type == IPCTNL_MSG_CT_GET_CTRZERO) { |
| 223 | pkts = atomic64_xchg(&counter[dir].packets, 0); |
| 224 | bytes = atomic64_xchg(&counter[dir].bytes, 0); |
| 225 | } else { |
| 226 | pkts = atomic64_read(&counter[dir].packets); |
| 227 | bytes = atomic64_read(&counter[dir].bytes); |
| 228 | } |
| 229 | |
| 230 | nest_count = nla_nest_start(skb, attr | NLA_F_NESTED); |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 231 | if (!nest_count) |
| 232 | goto nla_put_failure; |
| 233 | |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 234 | if (nla_put_be64(skb, CTA_COUNTERS_PACKETS, cpu_to_be64(pkts)) || |
| 235 | nla_put_be64(skb, CTA_COUNTERS_BYTES, cpu_to_be64(bytes))) |
| 236 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 237 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 238 | nla_nest_end(skb, nest_count); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 239 | |
| 240 | return 0; |
| 241 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 242 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 243 | return -1; |
| 244 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 245 | |
Pablo Neira Ayuso | a992ca2 | 2011-01-19 16:00:07 +0100 | [diff] [blame] | 246 | static int |
Holger Eitzenberger | 4542fa4 | 2013-09-26 17:31:52 +0200 | [diff] [blame] | 247 | ctnetlink_dump_acct(struct sk_buff *skb, const struct nf_conn *ct, int type) |
Pablo Neira Ayuso | 80e60e6 | 2011-12-24 14:11:39 +0100 | [diff] [blame] | 248 | { |
Holger Eitzenberger | 4542fa4 | 2013-09-26 17:31:52 +0200 | [diff] [blame] | 249 | struct nf_conn_acct *acct = nf_conn_acct_find(ct); |
Pablo Neira Ayuso | 80e60e6 | 2011-12-24 14:11:39 +0100 | [diff] [blame] | 250 | |
Pablo Neira Ayuso | 80e60e6 | 2011-12-24 14:11:39 +0100 | [diff] [blame] | 251 | if (!acct) |
| 252 | return 0; |
| 253 | |
Holger Eitzenberger | 4542fa4 | 2013-09-26 17:31:52 +0200 | [diff] [blame] | 254 | if (dump_counters(skb, acct, IP_CT_DIR_ORIGINAL, type) < 0) |
| 255 | return -1; |
| 256 | if (dump_counters(skb, acct, IP_CT_DIR_REPLY, type) < 0) |
| 257 | return -1; |
| 258 | |
| 259 | return 0; |
Pablo Neira Ayuso | 80e60e6 | 2011-12-24 14:11:39 +0100 | [diff] [blame] | 260 | } |
| 261 | |
| 262 | static int |
Pablo Neira Ayuso | a992ca2 | 2011-01-19 16:00:07 +0100 | [diff] [blame] | 263 | ctnetlink_dump_timestamp(struct sk_buff *skb, const struct nf_conn *ct) |
| 264 | { |
| 265 | struct nlattr *nest_count; |
| 266 | const struct nf_conn_tstamp *tstamp; |
| 267 | |
| 268 | tstamp = nf_conn_tstamp_find(ct); |
| 269 | if (!tstamp) |
| 270 | return 0; |
| 271 | |
| 272 | nest_count = nla_nest_start(skb, CTA_TIMESTAMP | NLA_F_NESTED); |
| 273 | if (!nest_count) |
| 274 | goto nla_put_failure; |
| 275 | |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 276 | if (nla_put_be64(skb, CTA_TIMESTAMP_START, cpu_to_be64(tstamp->start)) || |
| 277 | (tstamp->stop != 0 && nla_put_be64(skb, CTA_TIMESTAMP_STOP, |
| 278 | cpu_to_be64(tstamp->stop)))) |
| 279 | goto nla_put_failure; |
Pablo Neira Ayuso | a992ca2 | 2011-01-19 16:00:07 +0100 | [diff] [blame] | 280 | nla_nest_end(skb, nest_count); |
| 281 | |
| 282 | return 0; |
| 283 | |
| 284 | nla_put_failure: |
| 285 | return -1; |
| 286 | } |
| 287 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 288 | #ifdef CONFIG_NF_CONNTRACK_MARK |
| 289 | static inline int |
| 290 | ctnetlink_dump_mark(struct sk_buff *skb, const struct nf_conn *ct) |
| 291 | { |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 292 | if (nla_put_be32(skb, CTA_MARK, htonl(ct->mark))) |
| 293 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 294 | return 0; |
| 295 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 296 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 297 | return -1; |
| 298 | } |
| 299 | #else |
| 300 | #define ctnetlink_dump_mark(a, b) (0) |
| 301 | #endif |
| 302 | |
Pablo Neira Ayuso | 37fccd8 | 2007-12-17 22:28:41 -0800 | [diff] [blame] | 303 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
| 304 | static inline int |
Eric Paris | 1cc6324 | 2010-10-13 16:24:54 -0400 | [diff] [blame] | 305 | 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] | 306 | { |
Eric Paris | 1cc6324 | 2010-10-13 16:24:54 -0400 | [diff] [blame] | 307 | struct nlattr *nest_secctx; |
| 308 | int len, ret; |
| 309 | char *secctx; |
Pablo Neira Ayuso | 37fccd8 | 2007-12-17 22:28:41 -0800 | [diff] [blame] | 310 | |
Eric Paris | 1cc6324 | 2010-10-13 16:24:54 -0400 | [diff] [blame] | 311 | ret = security_secid_to_secctx(ct->secmark, &secctx, &len); |
| 312 | if (ret) |
Pablo Neira Ayuso | cba85b5 | 2011-01-06 11:25:00 -0800 | [diff] [blame] | 313 | return 0; |
Eric Paris | 1cc6324 | 2010-10-13 16:24:54 -0400 | [diff] [blame] | 314 | |
| 315 | ret = -1; |
| 316 | nest_secctx = nla_nest_start(skb, CTA_SECCTX | NLA_F_NESTED); |
| 317 | if (!nest_secctx) |
| 318 | goto nla_put_failure; |
| 319 | |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 320 | if (nla_put_string(skb, CTA_SECCTX_NAME, secctx)) |
| 321 | goto nla_put_failure; |
Eric Paris | 1cc6324 | 2010-10-13 16:24:54 -0400 | [diff] [blame] | 322 | nla_nest_end(skb, nest_secctx); |
| 323 | |
| 324 | ret = 0; |
Pablo Neira Ayuso | 37fccd8 | 2007-12-17 22:28:41 -0800 | [diff] [blame] | 325 | nla_put_failure: |
Eric Paris | 1cc6324 | 2010-10-13 16:24:54 -0400 | [diff] [blame] | 326 | security_release_secctx(secctx, len); |
| 327 | return ret; |
Pablo Neira Ayuso | 37fccd8 | 2007-12-17 22:28:41 -0800 | [diff] [blame] | 328 | } |
| 329 | #else |
Eric Paris | 1cc6324 | 2010-10-13 16:24:54 -0400 | [diff] [blame] | 330 | #define ctnetlink_dump_secctx(a, b) (0) |
Pablo Neira Ayuso | 37fccd8 | 2007-12-17 22:28:41 -0800 | [diff] [blame] | 331 | #endif |
| 332 | |
Florian Westphal | 0ceabd8 | 2013-01-11 06:30:45 +0000 | [diff] [blame] | 333 | #ifdef CONFIG_NF_CONNTRACK_LABELS |
| 334 | static int ctnetlink_label_size(const struct nf_conn *ct) |
| 335 | { |
| 336 | struct nf_conn_labels *labels = nf_ct_labels_find(ct); |
| 337 | |
| 338 | if (!labels) |
| 339 | return 0; |
| 340 | return nla_total_size(labels->words * sizeof(long)); |
| 341 | } |
| 342 | |
| 343 | static int |
| 344 | ctnetlink_dump_labels(struct sk_buff *skb, const struct nf_conn *ct) |
| 345 | { |
| 346 | struct nf_conn_labels *labels = nf_ct_labels_find(ct); |
| 347 | unsigned int len, i; |
| 348 | |
| 349 | if (!labels) |
| 350 | return 0; |
| 351 | |
| 352 | len = labels->words * sizeof(long); |
| 353 | i = 0; |
| 354 | do { |
| 355 | if (labels->bits[i] != 0) |
| 356 | return nla_put(skb, CTA_LABELS, len, labels->bits); |
| 357 | i++; |
| 358 | } while (i < labels->words); |
| 359 | |
| 360 | return 0; |
| 361 | } |
| 362 | #else |
| 363 | #define ctnetlink_dump_labels(a, b) (0) |
| 364 | #define ctnetlink_label_size(a) (0) |
| 365 | #endif |
| 366 | |
Pablo Neira Ayuso | 0f417ce | 2007-12-17 22:28:19 -0800 | [diff] [blame] | 367 | #define master_tuple(ct) &(ct->master->tuplehash[IP_CT_DIR_ORIGINAL].tuple) |
| 368 | |
| 369 | static inline int |
| 370 | ctnetlink_dump_master(struct sk_buff *skb, const struct nf_conn *ct) |
| 371 | { |
| 372 | struct nlattr *nest_parms; |
| 373 | |
| 374 | if (!(ct->status & IPS_EXPECTED)) |
| 375 | return 0; |
| 376 | |
| 377 | nest_parms = nla_nest_start(skb, CTA_TUPLE_MASTER | NLA_F_NESTED); |
| 378 | if (!nest_parms) |
| 379 | goto nla_put_failure; |
| 380 | if (ctnetlink_dump_tuples(skb, master_tuple(ct)) < 0) |
| 381 | goto nla_put_failure; |
| 382 | nla_nest_end(skb, nest_parms); |
| 383 | |
| 384 | return 0; |
| 385 | |
| 386 | nla_put_failure: |
| 387 | return -1; |
| 388 | } |
| 389 | |
Ilpo Järvinen | bb5cf80 | 2008-01-05 23:11:31 -0800 | [diff] [blame] | 390 | static int |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 391 | dump_ct_seq_adj(struct sk_buff *skb, const struct nf_ct_seqadj *seq, int type) |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 392 | { |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 393 | struct nlattr *nest_parms; |
| 394 | |
| 395 | nest_parms = nla_nest_start(skb, type | NLA_F_NESTED); |
| 396 | if (!nest_parms) |
| 397 | goto nla_put_failure; |
| 398 | |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 399 | if (nla_put_be32(skb, CTA_SEQADJ_CORRECTION_POS, |
| 400 | htonl(seq->correction_pos)) || |
| 401 | nla_put_be32(skb, CTA_SEQADJ_OFFSET_BEFORE, |
| 402 | htonl(seq->offset_before)) || |
| 403 | nla_put_be32(skb, CTA_SEQADJ_OFFSET_AFTER, |
| 404 | htonl(seq->offset_after))) |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 405 | goto nla_put_failure; |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 406 | |
| 407 | nla_nest_end(skb, nest_parms); |
| 408 | |
| 409 | return 0; |
| 410 | |
| 411 | nla_put_failure: |
| 412 | return -1; |
| 413 | } |
| 414 | |
| 415 | static inline int |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 416 | ctnetlink_dump_ct_seq_adj(struct sk_buff *skb, const struct nf_conn *ct) |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 417 | { |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 418 | struct nf_conn_seqadj *seqadj = nfct_seqadj(ct); |
| 419 | struct nf_ct_seqadj *seq; |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 420 | |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 421 | if (!(ct->status & IPS_SEQ_ADJUST) || !seqadj) |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 422 | return 0; |
| 423 | |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 424 | seq = &seqadj->seq[IP_CT_DIR_ORIGINAL]; |
| 425 | if (dump_ct_seq_adj(skb, seq, CTA_SEQ_ADJ_ORIG) == -1) |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 426 | return -1; |
| 427 | |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 428 | seq = &seqadj->seq[IP_CT_DIR_REPLY]; |
| 429 | if (dump_ct_seq_adj(skb, seq, CTA_SEQ_ADJ_REPLY) == -1) |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 430 | return -1; |
| 431 | |
| 432 | return 0; |
| 433 | } |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 434 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 435 | static inline int |
| 436 | ctnetlink_dump_id(struct sk_buff *skb, const struct nf_conn *ct) |
| 437 | { |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 438 | if (nla_put_be32(skb, CTA_ID, htonl((unsigned long)ct))) |
| 439 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 440 | return 0; |
| 441 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 442 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 443 | return -1; |
| 444 | } |
| 445 | |
| 446 | static inline int |
| 447 | ctnetlink_dump_use(struct sk_buff *skb, const struct nf_conn *ct) |
| 448 | { |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 449 | if (nla_put_be32(skb, CTA_USE, htonl(atomic_read(&ct->ct_general.use)))) |
| 450 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 451 | return 0; |
| 452 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 453 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 454 | return -1; |
| 455 | } |
| 456 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 457 | static int |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 458 | ctnetlink_fill_info(struct sk_buff *skb, u32 portid, u32 seq, u32 type, |
Pablo Neira Ayuso | 80e60e6 | 2011-12-24 14:11:39 +0100 | [diff] [blame] | 459 | struct nf_conn *ct) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 460 | { |
| 461 | struct nlmsghdr *nlh; |
| 462 | struct nfgenmsg *nfmsg; |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 463 | struct nlattr *nest_parms; |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 464 | unsigned int flags = portid ? NLM_F_MULTI : 0, event; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 465 | |
Pablo Neira Ayuso | 80e60e6 | 2011-12-24 14:11:39 +0100 | [diff] [blame] | 466 | event = (NFNL_SUBSYS_CTNETLINK << 8 | IPCTNL_MSG_CT_NEW); |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 467 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags); |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 468 | if (nlh == NULL) |
| 469 | goto nlmsg_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 | nfmsg = nlmsg_data(nlh); |
Patrick McHardy | 5e8fbe2 | 2008-04-14 11:15:52 +0200 | [diff] [blame] | 472 | nfmsg->nfgen_family = nf_ct_l3num(ct); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 473 | nfmsg->version = NFNETLINK_V0; |
| 474 | nfmsg->res_id = 0; |
| 475 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 476 | nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED); |
| 477 | if (!nest_parms) |
| 478 | goto nla_put_failure; |
Pablo Neira Ayuso | f2f3e38 | 2009-06-02 20:03:35 +0200 | [diff] [blame] | 479 | 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] | 480 | goto nla_put_failure; |
| 481 | nla_nest_end(skb, nest_parms); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 482 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 483 | nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED); |
| 484 | if (!nest_parms) |
| 485 | goto nla_put_failure; |
Pablo Neira Ayuso | f2f3e38 | 2009-06-02 20:03:35 +0200 | [diff] [blame] | 486 | 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] | 487 | goto nla_put_failure; |
| 488 | nla_nest_end(skb, nest_parms); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 489 | |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 490 | if (nf_ct_zone(ct) && |
| 491 | nla_put_be16(skb, CTA_ZONE, htons(nf_ct_zone(ct)))) |
| 492 | goto nla_put_failure; |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 493 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 494 | if (ctnetlink_dump_status(skb, ct) < 0 || |
| 495 | ctnetlink_dump_timeout(skb, ct) < 0 || |
Holger Eitzenberger | 4542fa4 | 2013-09-26 17:31:52 +0200 | [diff] [blame] | 496 | ctnetlink_dump_acct(skb, ct, type) < 0 || |
Pablo Neira Ayuso | a992ca2 | 2011-01-19 16:00:07 +0100 | [diff] [blame] | 497 | ctnetlink_dump_timestamp(skb, ct) < 0 || |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 498 | ctnetlink_dump_protoinfo(skb, ct) < 0 || |
| 499 | ctnetlink_dump_helpinfo(skb, ct) < 0 || |
| 500 | ctnetlink_dump_mark(skb, ct) < 0 || |
Eric Paris | 1cc6324 | 2010-10-13 16:24:54 -0400 | [diff] [blame] | 501 | ctnetlink_dump_secctx(skb, ct) < 0 || |
Florian Westphal | 0ceabd8 | 2013-01-11 06:30:45 +0000 | [diff] [blame] | 502 | ctnetlink_dump_labels(skb, ct) < 0 || |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 503 | ctnetlink_dump_id(skb, ct) < 0 || |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 504 | ctnetlink_dump_use(skb, ct) < 0 || |
Pablo Neira Ayuso | 0f417ce | 2007-12-17 22:28:19 -0800 | [diff] [blame] | 505 | ctnetlink_dump_master(skb, ct) < 0 || |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 506 | ctnetlink_dump_ct_seq_adj(skb, ct) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 507 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 508 | |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 509 | nlmsg_end(skb, nlh); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 510 | return skb->len; |
| 511 | |
| 512 | nlmsg_failure: |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 513 | nla_put_failure: |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 514 | nlmsg_cancel(skb, nlh); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 515 | return -1; |
| 516 | } |
| 517 | |
Pablo Neira Ayuso | 03b64f5 | 2009-06-02 20:08:27 +0200 | [diff] [blame] | 518 | static inline size_t |
| 519 | ctnetlink_proto_size(const struct nf_conn *ct) |
Holger Eitzenberger | 2732c4e | 2009-03-25 21:50:59 +0100 | [diff] [blame] | 520 | { |
| 521 | struct nf_conntrack_l3proto *l3proto; |
| 522 | struct nf_conntrack_l4proto *l4proto; |
Pablo Neira Ayuso | 03b64f5 | 2009-06-02 20:08:27 +0200 | [diff] [blame] | 523 | size_t len = 0; |
Holger Eitzenberger | 2732c4e | 2009-03-25 21:50:59 +0100 | [diff] [blame] | 524 | |
| 525 | rcu_read_lock(); |
Pablo Neira Ayuso | 03b64f5 | 2009-06-02 20:08:27 +0200 | [diff] [blame] | 526 | l3proto = __nf_ct_l3proto_find(nf_ct_l3num(ct)); |
Holger Eitzenberger | 2732c4e | 2009-03-25 21:50:59 +0100 | [diff] [blame] | 527 | len += l3proto->nla_size; |
| 528 | |
Pablo Neira Ayuso | 03b64f5 | 2009-06-02 20:08:27 +0200 | [diff] [blame] | 529 | 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] | 530 | len += l4proto->nla_size; |
| 531 | rcu_read_unlock(); |
| 532 | |
Pablo Neira Ayuso | 03b64f5 | 2009-06-02 20:08:27 +0200 | [diff] [blame] | 533 | return len; |
| 534 | } |
| 535 | |
| 536 | static inline size_t |
Holger Eitzenberger | f7b13e4 | 2013-09-26 17:31:51 +0200 | [diff] [blame] | 537 | ctnetlink_acct_size(const struct nf_conn *ct) |
Jiri Pirko | d26e6a0 | 2010-04-01 12:39:19 +0200 | [diff] [blame] | 538 | { |
| 539 | if (!nf_ct_ext_exist(ct, NF_CT_EXT_ACCT)) |
| 540 | return 0; |
| 541 | return 2 * nla_total_size(0) /* CTA_COUNTERS_ORIG|REPL */ |
| 542 | + 2 * nla_total_size(sizeof(uint64_t)) /* CTA_COUNTERS_PACKETS */ |
| 543 | + 2 * nla_total_size(sizeof(uint64_t)) /* CTA_COUNTERS_BYTES */ |
| 544 | ; |
| 545 | } |
| 546 | |
Pablo Neira Ayuso | cba85b5 | 2011-01-06 11:25:00 -0800 | [diff] [blame] | 547 | static inline int |
| 548 | ctnetlink_secctx_size(const struct nf_conn *ct) |
Eric Paris | 1cc6324 | 2010-10-13 16:24:54 -0400 | [diff] [blame] | 549 | { |
Pablo Neira Ayuso | cba85b5 | 2011-01-06 11:25:00 -0800 | [diff] [blame] | 550 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
| 551 | int len, ret; |
Eric Paris | 1cc6324 | 2010-10-13 16:24:54 -0400 | [diff] [blame] | 552 | |
Pablo Neira Ayuso | cba85b5 | 2011-01-06 11:25:00 -0800 | [diff] [blame] | 553 | ret = security_secid_to_secctx(ct->secmark, NULL, &len); |
| 554 | if (ret) |
| 555 | return 0; |
Eric Paris | 1cc6324 | 2010-10-13 16:24:54 -0400 | [diff] [blame] | 556 | |
Pablo Neira Ayuso | cba85b5 | 2011-01-06 11:25:00 -0800 | [diff] [blame] | 557 | return nla_total_size(0) /* CTA_SECCTX */ |
| 558 | + nla_total_size(sizeof(char) * len); /* CTA_SECCTX_NAME */ |
| 559 | #else |
| 560 | return 0; |
Eric Paris | 1cc6324 | 2010-10-13 16:24:54 -0400 | [diff] [blame] | 561 | #endif |
Pablo Neira Ayuso | cba85b5 | 2011-01-06 11:25:00 -0800 | [diff] [blame] | 562 | } |
Eric Paris | 1cc6324 | 2010-10-13 16:24:54 -0400 | [diff] [blame] | 563 | |
Jiri Pirko | d26e6a0 | 2010-04-01 12:39:19 +0200 | [diff] [blame] | 564 | static inline size_t |
Pablo Neira Ayuso | a992ca2 | 2011-01-19 16:00:07 +0100 | [diff] [blame] | 565 | ctnetlink_timestamp_size(const struct nf_conn *ct) |
| 566 | { |
| 567 | #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP |
| 568 | if (!nf_ct_ext_exist(ct, NF_CT_EXT_TSTAMP)) |
| 569 | return 0; |
| 570 | return nla_total_size(0) + 2 * nla_total_size(sizeof(uint64_t)); |
| 571 | #else |
| 572 | return 0; |
| 573 | #endif |
| 574 | } |
| 575 | |
| 576 | static inline size_t |
Pablo Neira Ayuso | 03b64f5 | 2009-06-02 20:08:27 +0200 | [diff] [blame] | 577 | ctnetlink_nlmsg_size(const struct nf_conn *ct) |
| 578 | { |
| 579 | return NLMSG_ALIGN(sizeof(struct nfgenmsg)) |
| 580 | + 3 * nla_total_size(0) /* CTA_TUPLE_ORIG|REPL|MASTER */ |
| 581 | + 3 * nla_total_size(0) /* CTA_TUPLE_IP */ |
| 582 | + 3 * nla_total_size(0) /* CTA_TUPLE_PROTO */ |
| 583 | + 3 * nla_total_size(sizeof(u_int8_t)) /* CTA_PROTO_NUM */ |
| 584 | + nla_total_size(sizeof(u_int32_t)) /* CTA_ID */ |
| 585 | + nla_total_size(sizeof(u_int32_t)) /* CTA_STATUS */ |
Holger Eitzenberger | f7b13e4 | 2013-09-26 17:31:51 +0200 | [diff] [blame] | 586 | + ctnetlink_acct_size(ct) |
Pablo Neira Ayuso | a992ca2 | 2011-01-19 16:00:07 +0100 | [diff] [blame] | 587 | + ctnetlink_timestamp_size(ct) |
Pablo Neira Ayuso | 03b64f5 | 2009-06-02 20:08:27 +0200 | [diff] [blame] | 588 | + nla_total_size(sizeof(u_int32_t)) /* CTA_TIMEOUT */ |
| 589 | + nla_total_size(0) /* CTA_PROTOINFO */ |
| 590 | + nla_total_size(0) /* CTA_HELP */ |
| 591 | + nla_total_size(NF_CT_HELPER_NAME_LEN) /* CTA_HELP_NAME */ |
Pablo Neira Ayuso | cba85b5 | 2011-01-06 11:25:00 -0800 | [diff] [blame] | 592 | + ctnetlink_secctx_size(ct) |
Pablo Neira Ayuso | 03b64f5 | 2009-06-02 20:08:27 +0200 | [diff] [blame] | 593 | #ifdef CONFIG_NF_NAT_NEEDED |
| 594 | + 2 * nla_total_size(0) /* CTA_NAT_SEQ_ADJ_ORIG|REPL */ |
| 595 | + 6 * nla_total_size(sizeof(u_int32_t)) /* CTA_NAT_SEQ_OFFSET */ |
| 596 | #endif |
| 597 | #ifdef CONFIG_NF_CONNTRACK_MARK |
| 598 | + nla_total_size(sizeof(u_int32_t)) /* CTA_MARK */ |
| 599 | #endif |
| 600 | + ctnetlink_proto_size(ct) |
Florian Westphal | 0ceabd8 | 2013-01-11 06:30:45 +0000 | [diff] [blame] | 601 | + ctnetlink_label_size(ct) |
Pablo Neira Ayuso | 03b64f5 | 2009-06-02 20:08:27 +0200 | [diff] [blame] | 602 | ; |
Holger Eitzenberger | 2732c4e | 2009-03-25 21:50:59 +0100 | [diff] [blame] | 603 | } |
| 604 | |
Pablo Neira Ayuso | 8e36c4b | 2012-06-23 01:43:51 +0200 | [diff] [blame] | 605 | #ifdef CONFIG_NF_CONNTRACK_EVENTS |
Pablo Neira Ayuso | e34d5c1 | 2009-06-03 10:32:06 +0200 | [diff] [blame] | 606 | static int |
| 607 | ctnetlink_conntrack_event(unsigned int events, struct nf_ct_event *item) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 608 | { |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 609 | struct net *net; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 610 | struct nlmsghdr *nlh; |
| 611 | struct nfgenmsg *nfmsg; |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 612 | struct nlattr *nest_parms; |
Pablo Neira Ayuso | 19abb7b | 2008-11-18 11:56:20 +0100 | [diff] [blame] | 613 | struct nf_conn *ct = item->ct; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 614 | struct sk_buff *skb; |
| 615 | unsigned int type; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 616 | unsigned int flags = 0, group; |
Pablo Neira Ayuso | dd7669a | 2009-06-13 12:30:52 +0200 | [diff] [blame] | 617 | int err; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 618 | |
| 619 | /* ignore our fake conntrack entry */ |
Eric Dumazet | 5bfddbd | 2010-06-08 16:09:52 +0200 | [diff] [blame] | 620 | if (nf_ct_is_untracked(ct)) |
Pablo Neira Ayuso | e34d5c1 | 2009-06-03 10:32:06 +0200 | [diff] [blame] | 621 | return 0; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 622 | |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 623 | if (events & (1 << IPCT_DESTROY)) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 624 | type = IPCTNL_MSG_CT_DELETE; |
| 625 | group = NFNLGRP_CONNTRACK_DESTROY; |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 626 | } else if (events & ((1 << IPCT_NEW) | (1 << IPCT_RELATED))) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 627 | type = IPCTNL_MSG_CT_NEW; |
| 628 | flags = NLM_F_CREATE|NLM_F_EXCL; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 629 | group = NFNLGRP_CONNTRACK_NEW; |
Pablo Neira Ayuso | 17e6e4e | 2009-06-02 20:08:46 +0200 | [diff] [blame] | 630 | } else if (events) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 631 | type = IPCTNL_MSG_CT_NEW; |
| 632 | group = NFNLGRP_CONNTRACK_UPDATE; |
| 633 | } else |
Pablo Neira Ayuso | e34d5c1 | 2009-06-03 10:32:06 +0200 | [diff] [blame] | 634 | return 0; |
Patrick McHardy | a242769 | 2006-03-20 18:03:59 -0800 | [diff] [blame] | 635 | |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 636 | net = nf_ct_net(ct); |
| 637 | if (!item->report && !nfnetlink_has_listeners(net, group)) |
Pablo Neira Ayuso | e34d5c1 | 2009-06-03 10:32:06 +0200 | [diff] [blame] | 638 | return 0; |
Patrick McHardy | a242769 | 2006-03-20 18:03:59 -0800 | [diff] [blame] | 639 | |
Pablo Neira Ayuso | 03b64f5 | 2009-06-02 20:08:27 +0200 | [diff] [blame] | 640 | skb = nlmsg_new(ctnetlink_nlmsg_size(ct), GFP_ATOMIC); |
| 641 | if (skb == NULL) |
Pablo Neira Ayuso | 150ace0 | 2009-04-17 17:47:31 +0200 | [diff] [blame] | 642 | goto errout; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 643 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 644 | type |= NFNL_SUBSYS_CTNETLINK << 8; |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 645 | nlh = nlmsg_put(skb, item->portid, 0, type, sizeof(*nfmsg), flags); |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 646 | if (nlh == NULL) |
| 647 | goto nlmsg_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 648 | |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 649 | nfmsg = nlmsg_data(nlh); |
Patrick McHardy | 5e8fbe2 | 2008-04-14 11:15:52 +0200 | [diff] [blame] | 650 | nfmsg->nfgen_family = nf_ct_l3num(ct); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 651 | nfmsg->version = NFNETLINK_V0; |
| 652 | nfmsg->res_id = 0; |
| 653 | |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 654 | rcu_read_lock(); |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 655 | nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED); |
| 656 | if (!nest_parms) |
| 657 | goto nla_put_failure; |
Pablo Neira Ayuso | f2f3e38 | 2009-06-02 20:03:35 +0200 | [diff] [blame] | 658 | 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] | 659 | goto nla_put_failure; |
| 660 | nla_nest_end(skb, nest_parms); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 661 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 662 | nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED); |
| 663 | if (!nest_parms) |
| 664 | goto nla_put_failure; |
Pablo Neira Ayuso | f2f3e38 | 2009-06-02 20:03:35 +0200 | [diff] [blame] | 665 | 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] | 666 | goto nla_put_failure; |
| 667 | nla_nest_end(skb, nest_parms); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 668 | |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 669 | if (nf_ct_zone(ct) && |
| 670 | nla_put_be16(skb, CTA_ZONE, htons(nf_ct_zone(ct)))) |
| 671 | goto nla_put_failure; |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 672 | |
Eric Leblond | 1eedf69 | 2008-05-13 23:27:11 -0700 | [diff] [blame] | 673 | if (ctnetlink_dump_id(skb, ct) < 0) |
| 674 | goto nla_put_failure; |
| 675 | |
Fabian Hugelshofer | e57dce6 | 2008-06-09 15:59:58 -0700 | [diff] [blame] | 676 | if (ctnetlink_dump_status(skb, ct) < 0) |
| 677 | goto nla_put_failure; |
| 678 | |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 679 | if (events & (1 << IPCT_DESTROY)) { |
Holger Eitzenberger | 4542fa4 | 2013-09-26 17:31:52 +0200 | [diff] [blame] | 680 | if (ctnetlink_dump_acct(skb, ct, type) < 0 || |
Pablo Neira Ayuso | a992ca2 | 2011-01-19 16:00:07 +0100 | [diff] [blame] | 681 | ctnetlink_dump_timestamp(skb, ct) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 682 | goto nla_put_failure; |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 683 | } else { |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 684 | if (ctnetlink_dump_timeout(skb, ct) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 685 | goto nla_put_failure; |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 686 | |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 687 | if (events & (1 << IPCT_PROTOINFO) |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 688 | && ctnetlink_dump_protoinfo(skb, ct) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 689 | goto nla_put_failure; |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 690 | |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 691 | if ((events & (1 << IPCT_HELPER) || nfct_help(ct)) |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 692 | && ctnetlink_dump_helpinfo(skb, ct) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 693 | goto nla_put_failure; |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 694 | |
Eric Paris | ff660c8 | 2010-10-19 18:17:32 -0400 | [diff] [blame] | 695 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 696 | if ((events & (1 << IPCT_SECMARK) || ct->secmark) |
Eric Paris | 1cc6324 | 2010-10-13 16:24:54 -0400 | [diff] [blame] | 697 | && ctnetlink_dump_secctx(skb, ct) < 0) |
Pablo Neira Ayuso | 37fccd8 | 2007-12-17 22:28:41 -0800 | [diff] [blame] | 698 | goto nla_put_failure; |
Eric Paris | ff660c8 | 2010-10-19 18:17:32 -0400 | [diff] [blame] | 699 | #endif |
Florian Westphal | 0ceabd8 | 2013-01-11 06:30:45 +0000 | [diff] [blame] | 700 | if (events & (1 << IPCT_LABEL) && |
| 701 | ctnetlink_dump_labels(skb, ct) < 0) |
| 702 | goto nla_put_failure; |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 703 | |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 704 | if (events & (1 << IPCT_RELATED) && |
Pablo Neira Ayuso | 0f417ce | 2007-12-17 22:28:19 -0800 | [diff] [blame] | 705 | ctnetlink_dump_master(skb, ct) < 0) |
| 706 | goto nla_put_failure; |
| 707 | |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 708 | if (events & (1 << IPCT_SEQADJ) && |
| 709 | ctnetlink_dump_ct_seq_adj(skb, ct) < 0) |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 710 | goto nla_put_failure; |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 711 | } |
Pablo Neira Ayuso | b9a37e0 | 2006-08-22 00:31:49 -0700 | [diff] [blame] | 712 | |
Eric Leblond | a83099a | 2008-01-31 04:44:27 -0800 | [diff] [blame] | 713 | #ifdef CONFIG_NF_CONNTRACK_MARK |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 714 | if ((events & (1 << IPCT_MARK) || ct->mark) |
Eric Leblond | a83099a | 2008-01-31 04:44:27 -0800 | [diff] [blame] | 715 | && ctnetlink_dump_mark(skb, ct) < 0) |
| 716 | goto nla_put_failure; |
| 717 | #endif |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 718 | rcu_read_unlock(); |
Eric Leblond | a83099a | 2008-01-31 04:44:27 -0800 | [diff] [blame] | 719 | |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 720 | nlmsg_end(skb, nlh); |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 721 | err = nfnetlink_send(skb, net, item->portid, group, item->report, |
Alexey Dobriyan | cd8c20b | 2010-01-13 16:02:14 +0100 | [diff] [blame] | 722 | GFP_ATOMIC); |
Pablo Neira Ayuso | dd7669a | 2009-06-13 12:30:52 +0200 | [diff] [blame] | 723 | if (err == -ENOBUFS || err == -EAGAIN) |
| 724 | return -ENOBUFS; |
| 725 | |
Pablo Neira Ayuso | e34d5c1 | 2009-06-03 10:32:06 +0200 | [diff] [blame] | 726 | return 0; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 727 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 728 | nla_put_failure: |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 729 | rcu_read_unlock(); |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 730 | nlmsg_cancel(skb, nlh); |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 731 | nlmsg_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 732 | kfree_skb(skb); |
Pablo Neira Ayuso | 150ace0 | 2009-04-17 17:47:31 +0200 | [diff] [blame] | 733 | errout: |
Pablo Neira Ayuso | 37b7ef7 | 2010-03-16 13:30:21 +0000 | [diff] [blame] | 734 | if (nfnetlink_set_err(net, 0, group, -ENOBUFS) > 0) |
| 735 | return -ENOBUFS; |
| 736 | |
Pablo Neira Ayuso | e34d5c1 | 2009-06-03 10:32:06 +0200 | [diff] [blame] | 737 | return 0; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 738 | } |
| 739 | #endif /* CONFIG_NF_CONNTRACK_EVENTS */ |
| 740 | |
| 741 | static int ctnetlink_done(struct netlink_callback *cb) |
| 742 | { |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 743 | if (cb->args[1]) |
| 744 | nf_ct_put((struct nf_conn *)cb->args[1]); |
Pablo Neira Ayuso | 0f298a2 | 2012-02-24 14:41:50 +0000 | [diff] [blame] | 745 | if (cb->data) |
| 746 | kfree(cb->data); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 747 | return 0; |
| 748 | } |
| 749 | |
Pablo Neira Ayuso | 0f298a2 | 2012-02-24 14:41:50 +0000 | [diff] [blame] | 750 | struct ctnetlink_dump_filter { |
| 751 | struct { |
| 752 | u_int32_t val; |
| 753 | u_int32_t mask; |
| 754 | } mark; |
| 755 | }; |
| 756 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 757 | static int |
| 758 | ctnetlink_dump_table(struct sk_buff *skb, struct netlink_callback *cb) |
| 759 | { |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 760 | struct net *net = sock_net(skb->sk); |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 761 | struct nf_conn *ct, *last; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 762 | struct nf_conntrack_tuple_hash *h; |
Eric Dumazet | ea781f1 | 2009-03-25 21:05:46 +0100 | [diff] [blame] | 763 | struct hlist_nulls_node *n; |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 764 | struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh); |
Pablo Neira Ayuso | 87711cb | 2006-01-05 12:19:23 -0800 | [diff] [blame] | 765 | u_int8_t l3proto = nfmsg->nfgen_family; |
Hans Schillstrom | 3b988ec | 2012-03-05 02:24:29 +0000 | [diff] [blame] | 766 | int res; |
Pablo Neira Ayuso | 0f298a2 | 2012-02-24 14:41:50 +0000 | [diff] [blame] | 767 | #ifdef CONFIG_NF_CONNTRACK_MARK |
| 768 | const struct ctnetlink_dump_filter *filter = cb->data; |
| 769 | #endif |
Hans Schillstrom | 3b988ec | 2012-03-05 02:24:29 +0000 | [diff] [blame] | 770 | |
Stephen Hemminger | 13ee6ac | 2011-01-11 23:54:42 +0100 | [diff] [blame] | 771 | spin_lock_bh(&nf_conntrack_lock); |
Patrick McHardy | d205dc4 | 2006-08-17 18:12:38 -0700 | [diff] [blame] | 772 | last = (struct nf_conn *)cb->args[1]; |
Patrick McHardy | 9ab99d5 | 2010-02-10 14:17:10 +0100 | [diff] [blame] | 773 | for (; cb->args[0] < net->ct.htable_size; cb->args[0]++) { |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 774 | restart: |
Stephen Hemminger | 13ee6ac | 2011-01-11 23:54:42 +0100 | [diff] [blame] | 775 | 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] | 776 | hnnode) { |
Jozsef Kadlecsik | 5b1158e | 2006-12-02 22:07:13 -0800 | [diff] [blame] | 777 | if (NF_CT_DIRECTION(h) != IP_CT_DIR_ORIGINAL) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 778 | continue; |
| 779 | ct = nf_ct_tuplehash_to_ctrack(h); |
Pablo Neira Ayuso | 87711cb | 2006-01-05 12:19:23 -0800 | [diff] [blame] | 780 | /* Dump entries of a given L3 protocol number. |
| 781 | * If it is not specified, ie. l3proto == 0, |
| 782 | * then dump everything. */ |
Patrick McHardy | 5e8fbe2 | 2008-04-14 11:15:52 +0200 | [diff] [blame] | 783 | if (l3proto && nf_ct_l3num(ct) != l3proto) |
Stephen Hemminger | 13ee6ac | 2011-01-11 23:54:42 +0100 | [diff] [blame] | 784 | continue; |
Patrick McHardy | d205dc4 | 2006-08-17 18:12:38 -0700 | [diff] [blame] | 785 | if (cb->args[1]) { |
| 786 | if (ct != last) |
Stephen Hemminger | 13ee6ac | 2011-01-11 23:54:42 +0100 | [diff] [blame] | 787 | continue; |
Patrick McHardy | d205dc4 | 2006-08-17 18:12:38 -0700 | [diff] [blame] | 788 | cb->args[1] = 0; |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 789 | } |
Pablo Neira Ayuso | 0f298a2 | 2012-02-24 14:41:50 +0000 | [diff] [blame] | 790 | #ifdef CONFIG_NF_CONNTRACK_MARK |
| 791 | if (filter && !((ct->mark & filter->mark.mask) == |
| 792 | filter->mark.val)) { |
| 793 | continue; |
| 794 | } |
| 795 | #endif |
Hans Schillstrom | 3b988ec | 2012-03-05 02:24:29 +0000 | [diff] [blame] | 796 | rcu_read_lock(); |
| 797 | res = |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 798 | ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).portid, |
Hans Schillstrom | 3b988ec | 2012-03-05 02:24:29 +0000 | [diff] [blame] | 799 | cb->nlh->nlmsg_seq, |
| 800 | NFNL_MSG_TYPE(cb->nlh->nlmsg_type), |
| 801 | ct); |
| 802 | rcu_read_unlock(); |
| 803 | if (res < 0) { |
Pablo Neira Ayuso | c71caf4 | 2011-01-24 19:01:07 +0100 | [diff] [blame] | 804 | nf_conntrack_get(&ct->ct_general); |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 805 | cb->args[1] = (unsigned long)ct; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 806 | goto out; |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 807 | } |
| 808 | } |
Patrick McHardy | d205dc4 | 2006-08-17 18:12:38 -0700 | [diff] [blame] | 809 | if (cb->args[1]) { |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 810 | cb->args[1] = 0; |
| 811 | goto restart; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 812 | } |
| 813 | } |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 814 | out: |
Stephen Hemminger | 13ee6ac | 2011-01-11 23:54:42 +0100 | [diff] [blame] | 815 | spin_unlock_bh(&nf_conntrack_lock); |
Patrick McHardy | d205dc4 | 2006-08-17 18:12:38 -0700 | [diff] [blame] | 816 | if (last) |
| 817 | nf_ct_put(last); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 818 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 819 | return skb->len; |
| 820 | } |
| 821 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 822 | static inline int |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 823 | 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] | 824 | { |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 825 | struct nlattr *tb[CTA_IP_MAX+1]; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 826 | struct nf_conntrack_l3proto *l3proto; |
| 827 | int ret = 0; |
| 828 | |
Daniel Borkmann | 130ffbc | 2013-06-12 17:54:51 +0200 | [diff] [blame] | 829 | ret = nla_parse_nested(tb, CTA_IP_MAX, attr, NULL); |
| 830 | if (ret < 0) |
| 831 | return ret; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 832 | |
Florian Westphal | cd91566 | 2009-03-18 17:28:37 +0100 | [diff] [blame] | 833 | rcu_read_lock(); |
| 834 | l3proto = __nf_ct_l3proto_find(tuple->src.l3num); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 835 | |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 836 | if (likely(l3proto->nlattr_to_tuple)) { |
| 837 | ret = nla_validate_nested(attr, CTA_IP_MAX, |
| 838 | l3proto->nla_policy); |
| 839 | if (ret == 0) |
| 840 | ret = l3proto->nlattr_to_tuple(tb, tuple); |
| 841 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 842 | |
Florian Westphal | cd91566 | 2009-03-18 17:28:37 +0100 | [diff] [blame] | 843 | rcu_read_unlock(); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 844 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 845 | return ret; |
| 846 | } |
| 847 | |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 848 | static const struct nla_policy proto_nla_policy[CTA_PROTO_MAX+1] = { |
| 849 | [CTA_PROTO_NUM] = { .type = NLA_U8 }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 850 | }; |
| 851 | |
| 852 | static inline int |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 853 | ctnetlink_parse_tuple_proto(struct nlattr *attr, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 854 | struct nf_conntrack_tuple *tuple) |
| 855 | { |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 856 | struct nlattr *tb[CTA_PROTO_MAX+1]; |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 857 | struct nf_conntrack_l4proto *l4proto; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 858 | int ret = 0; |
| 859 | |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 860 | ret = nla_parse_nested(tb, CTA_PROTO_MAX, attr, proto_nla_policy); |
| 861 | if (ret < 0) |
| 862 | return ret; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 863 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 864 | if (!tb[CTA_PROTO_NUM]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 865 | return -EINVAL; |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 866 | tuple->dst.protonum = nla_get_u8(tb[CTA_PROTO_NUM]); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 867 | |
Florian Westphal | cd91566 | 2009-03-18 17:28:37 +0100 | [diff] [blame] | 868 | rcu_read_lock(); |
| 869 | l4proto = __nf_ct_l4proto_find(tuple->src.l3num, tuple->dst.protonum); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 870 | |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 871 | if (likely(l4proto->nlattr_to_tuple)) { |
| 872 | ret = nla_validate_nested(attr, CTA_PROTO_MAX, |
| 873 | l4proto->nla_policy); |
| 874 | if (ret == 0) |
| 875 | ret = l4proto->nlattr_to_tuple(tb, tuple); |
| 876 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 877 | |
Florian Westphal | cd91566 | 2009-03-18 17:28:37 +0100 | [diff] [blame] | 878 | rcu_read_unlock(); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 879 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 880 | return ret; |
| 881 | } |
| 882 | |
Patrick McHardy | d0b0268 | 2010-02-10 15:38:33 +0100 | [diff] [blame] | 883 | static const struct nla_policy tuple_nla_policy[CTA_TUPLE_MAX+1] = { |
| 884 | [CTA_TUPLE_IP] = { .type = NLA_NESTED }, |
| 885 | [CTA_TUPLE_PROTO] = { .type = NLA_NESTED }, |
| 886 | }; |
| 887 | |
Ilpo Järvinen | bb5cf80 | 2008-01-05 23:11:31 -0800 | [diff] [blame] | 888 | static int |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 889 | ctnetlink_parse_tuple(const struct nlattr * const cda[], |
| 890 | struct nf_conntrack_tuple *tuple, |
Patrick McHardy | a00f1f3 | 2011-02-01 17:26:37 +0100 | [diff] [blame] | 891 | enum ctattr_type type, u_int8_t l3num) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 892 | { |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 893 | struct nlattr *tb[CTA_TUPLE_MAX+1]; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 894 | int err; |
| 895 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 896 | memset(tuple, 0, sizeof(*tuple)); |
| 897 | |
Daniel Borkmann | 130ffbc | 2013-06-12 17:54:51 +0200 | [diff] [blame] | 898 | err = nla_parse_nested(tb, CTA_TUPLE_MAX, cda[type], tuple_nla_policy); |
| 899 | if (err < 0) |
| 900 | return err; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 901 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 902 | if (!tb[CTA_TUPLE_IP]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 903 | return -EINVAL; |
| 904 | |
| 905 | tuple->src.l3num = l3num; |
| 906 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 907 | err = ctnetlink_parse_tuple_ip(tb[CTA_TUPLE_IP], tuple); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 908 | if (err < 0) |
| 909 | return err; |
| 910 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 911 | if (!tb[CTA_TUPLE_PROTO]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 912 | return -EINVAL; |
| 913 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 914 | err = ctnetlink_parse_tuple_proto(tb[CTA_TUPLE_PROTO], tuple); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 915 | if (err < 0) |
| 916 | return err; |
| 917 | |
| 918 | /* orig and expect tuples get DIR_ORIGINAL */ |
| 919 | if (type == CTA_TUPLE_REPLY) |
| 920 | tuple->dst.dir = IP_CT_DIR_REPLY; |
| 921 | else |
| 922 | tuple->dst.dir = IP_CT_DIR_ORIGINAL; |
| 923 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 924 | return 0; |
| 925 | } |
| 926 | |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 927 | static int |
| 928 | ctnetlink_parse_zone(const struct nlattr *attr, u16 *zone) |
| 929 | { |
| 930 | if (attr) |
| 931 | #ifdef CONFIG_NF_CONNTRACK_ZONES |
| 932 | *zone = ntohs(nla_get_be16(attr)); |
| 933 | #else |
| 934 | return -EOPNOTSUPP; |
| 935 | #endif |
| 936 | else |
| 937 | *zone = 0; |
| 938 | |
| 939 | return 0; |
| 940 | } |
| 941 | |
Patrick McHardy | d0b0268 | 2010-02-10 15:38:33 +0100 | [diff] [blame] | 942 | static const struct nla_policy help_nla_policy[CTA_HELP_MAX+1] = { |
Florian Westphal | 6d1fafc | 2012-11-22 01:32:46 +0000 | [diff] [blame] | 943 | [CTA_HELP_NAME] = { .type = NLA_NUL_STRING, |
| 944 | .len = NF_CT_HELPER_NAME_LEN - 1 }, |
Patrick McHardy | d0b0268 | 2010-02-10 15:38:33 +0100 | [diff] [blame] | 945 | }; |
| 946 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 947 | static inline int |
Pablo Neira Ayuso | ae243be | 2012-06-07 14:19:42 +0200 | [diff] [blame] | 948 | ctnetlink_parse_help(const struct nlattr *attr, char **helper_name, |
| 949 | struct nlattr **helpinfo) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 950 | { |
Daniel Borkmann | 130ffbc | 2013-06-12 17:54:51 +0200 | [diff] [blame] | 951 | int err; |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 952 | struct nlattr *tb[CTA_HELP_MAX+1]; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 953 | |
Daniel Borkmann | 130ffbc | 2013-06-12 17:54:51 +0200 | [diff] [blame] | 954 | err = nla_parse_nested(tb, CTA_HELP_MAX, attr, help_nla_policy); |
| 955 | if (err < 0) |
| 956 | return err; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 957 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 958 | if (!tb[CTA_HELP_NAME]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 959 | return -EINVAL; |
| 960 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 961 | *helper_name = nla_data(tb[CTA_HELP_NAME]); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 962 | |
Pablo Neira Ayuso | ae243be | 2012-06-07 14:19:42 +0200 | [diff] [blame] | 963 | if (tb[CTA_HELP_INFO]) |
| 964 | *helpinfo = tb[CTA_HELP_INFO]; |
| 965 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 966 | return 0; |
| 967 | } |
| 968 | |
Florian Westphal | 9b21f6a | 2013-01-11 06:30:46 +0000 | [diff] [blame] | 969 | #define __CTA_LABELS_MAX_LENGTH ((XT_CONNLABEL_MAXBIT + 1) / BITS_PER_BYTE) |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 970 | static const struct nla_policy ct_nla_policy[CTA_MAX+1] = { |
Patrick McHardy | d0b0268 | 2010-02-10 15:38:33 +0100 | [diff] [blame] | 971 | [CTA_TUPLE_ORIG] = { .type = NLA_NESTED }, |
| 972 | [CTA_TUPLE_REPLY] = { .type = NLA_NESTED }, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 973 | [CTA_STATUS] = { .type = NLA_U32 }, |
Patrick McHardy | d0b0268 | 2010-02-10 15:38:33 +0100 | [diff] [blame] | 974 | [CTA_PROTOINFO] = { .type = NLA_NESTED }, |
| 975 | [CTA_HELP] = { .type = NLA_NESTED }, |
| 976 | [CTA_NAT_SRC] = { .type = NLA_NESTED }, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 977 | [CTA_TIMEOUT] = { .type = NLA_U32 }, |
| 978 | [CTA_MARK] = { .type = NLA_U32 }, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 979 | [CTA_ID] = { .type = NLA_U32 }, |
Patrick McHardy | d0b0268 | 2010-02-10 15:38:33 +0100 | [diff] [blame] | 980 | [CTA_NAT_DST] = { .type = NLA_NESTED }, |
| 981 | [CTA_TUPLE_MASTER] = { .type = NLA_NESTED }, |
Florian Westphal | 6d1fafc | 2012-11-22 01:32:46 +0000 | [diff] [blame] | 982 | [CTA_NAT_SEQ_ADJ_ORIG] = { .type = NLA_NESTED }, |
| 983 | [CTA_NAT_SEQ_ADJ_REPLY] = { .type = NLA_NESTED }, |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 984 | [CTA_ZONE] = { .type = NLA_U16 }, |
Pablo Neira Ayuso | 0f298a2 | 2012-02-24 14:41:50 +0000 | [diff] [blame] | 985 | [CTA_MARK_MASK] = { .type = NLA_U32 }, |
Florian Westphal | 9b21f6a | 2013-01-11 06:30:46 +0000 | [diff] [blame] | 986 | [CTA_LABELS] = { .type = NLA_BINARY, |
| 987 | .len = __CTA_LABELS_MAX_LENGTH }, |
| 988 | [CTA_LABELS_MASK] = { .type = NLA_BINARY, |
| 989 | .len = __CTA_LABELS_MAX_LENGTH }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 990 | }; |
| 991 | |
| 992 | static int |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 993 | ctnetlink_del_conntrack(struct sock *ctnl, struct sk_buff *skb, |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 994 | const struct nlmsghdr *nlh, |
| 995 | const struct nlattr * const cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 996 | { |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 997 | struct net *net = sock_net(ctnl); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 998 | struct nf_conntrack_tuple_hash *h; |
| 999 | struct nf_conntrack_tuple tuple; |
| 1000 | struct nf_conn *ct; |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 1001 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1002 | u_int8_t u3 = nfmsg->nfgen_family; |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 1003 | u16 zone; |
| 1004 | int err; |
| 1005 | |
| 1006 | err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone); |
| 1007 | if (err < 0) |
| 1008 | return err; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1009 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1010 | if (cda[CTA_TUPLE_ORIG]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1011 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, u3); |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1012 | else if (cda[CTA_TUPLE_REPLY]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1013 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, u3); |
| 1014 | else { |
| 1015 | /* Flush the whole table */ |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 1016 | nf_conntrack_flush_report(net, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1017 | NETLINK_CB(skb).portid, |
Pablo Neira Ayuso | 274d383 | 2009-06-02 20:08:38 +0200 | [diff] [blame] | 1018 | nlmsg_report(nlh)); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1019 | return 0; |
| 1020 | } |
| 1021 | |
| 1022 | if (err < 0) |
| 1023 | return err; |
| 1024 | |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 1025 | h = nf_conntrack_find_get(net, zone, &tuple); |
Pablo Neira Ayuso | 9ea8cfd | 2006-10-12 14:09:16 -0700 | [diff] [blame] | 1026 | if (!h) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1027 | return -ENOENT; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1028 | |
| 1029 | ct = nf_ct_tuplehash_to_ctrack(h); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1030 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1031 | if (cda[CTA_ID]) { |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 1032 | u_int32_t id = ntohl(nla_get_be32(cda[CTA_ID])); |
Patrick McHardy | 7f85f91 | 2007-09-28 14:41:27 -0700 | [diff] [blame] | 1033 | if (id != (u32)(unsigned long)ct) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1034 | nf_ct_put(ct); |
| 1035 | return -ENOENT; |
| 1036 | } |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1037 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1038 | |
Florian Westphal | 02982c2 | 2013-07-29 15:41:54 +0200 | [diff] [blame] | 1039 | if (del_timer(&ct->timeout)) |
| 1040 | nf_ct_delete(ct, NETLINK_CB(skb).portid, nlmsg_report(nlh)); |
| 1041 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1042 | nf_ct_put(ct); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1043 | |
| 1044 | return 0; |
| 1045 | } |
| 1046 | |
| 1047 | static int |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1048 | ctnetlink_get_conntrack(struct sock *ctnl, struct sk_buff *skb, |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 1049 | const struct nlmsghdr *nlh, |
| 1050 | const struct nlattr * const cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1051 | { |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 1052 | struct net *net = sock_net(ctnl); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1053 | struct nf_conntrack_tuple_hash *h; |
| 1054 | struct nf_conntrack_tuple tuple; |
| 1055 | struct nf_conn *ct; |
| 1056 | struct sk_buff *skb2 = NULL; |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 1057 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1058 | u_int8_t u3 = nfmsg->nfgen_family; |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 1059 | u16 zone; |
| 1060 | int err; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1061 | |
Pablo Neira Ayuso | 80d326f | 2012-02-24 14:30:15 +0000 | [diff] [blame] | 1062 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
| 1063 | struct netlink_dump_control c = { |
| 1064 | .dump = ctnetlink_dump_table, |
| 1065 | .done = ctnetlink_done, |
| 1066 | }; |
Pablo Neira Ayuso | 0f298a2 | 2012-02-24 14:41:50 +0000 | [diff] [blame] | 1067 | #ifdef CONFIG_NF_CONNTRACK_MARK |
| 1068 | if (cda[CTA_MARK] && cda[CTA_MARK_MASK]) { |
| 1069 | struct ctnetlink_dump_filter *filter; |
| 1070 | |
| 1071 | filter = kzalloc(sizeof(struct ctnetlink_dump_filter), |
| 1072 | GFP_ATOMIC); |
| 1073 | if (filter == NULL) |
| 1074 | return -ENOMEM; |
| 1075 | |
| 1076 | filter->mark.val = ntohl(nla_get_be32(cda[CTA_MARK])); |
| 1077 | filter->mark.mask = |
| 1078 | ntohl(nla_get_be32(cda[CTA_MARK_MASK])); |
| 1079 | c.data = filter; |
| 1080 | } |
| 1081 | #endif |
Pablo Neira Ayuso | 80d326f | 2012-02-24 14:30:15 +0000 | [diff] [blame] | 1082 | return netlink_dump_start(ctnl, skb, nlh, &c); |
| 1083 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1084 | |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 1085 | err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone); |
| 1086 | if (err < 0) |
| 1087 | return err; |
| 1088 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1089 | if (cda[CTA_TUPLE_ORIG]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1090 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, u3); |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1091 | else if (cda[CTA_TUPLE_REPLY]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1092 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, u3); |
| 1093 | else |
| 1094 | return -EINVAL; |
| 1095 | |
| 1096 | if (err < 0) |
| 1097 | return err; |
| 1098 | |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 1099 | h = nf_conntrack_find_get(net, zone, &tuple); |
Pablo Neira Ayuso | 9ea8cfd | 2006-10-12 14:09:16 -0700 | [diff] [blame] | 1100 | if (!h) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1101 | return -ENOENT; |
Pablo Neira Ayuso | 9ea8cfd | 2006-10-12 14:09:16 -0700 | [diff] [blame] | 1102 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1103 | ct = nf_ct_tuplehash_to_ctrack(h); |
| 1104 | |
| 1105 | err = -ENOMEM; |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 1106 | skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
| 1107 | if (skb2 == NULL) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1108 | nf_ct_put(ct); |
| 1109 | return -ENOMEM; |
| 1110 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1111 | |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 1112 | rcu_read_lock(); |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1113 | err = ctnetlink_fill_info(skb2, NETLINK_CB(skb).portid, nlh->nlmsg_seq, |
Pablo Neira Ayuso | 80e60e6 | 2011-12-24 14:11:39 +0100 | [diff] [blame] | 1114 | NFNL_MSG_TYPE(nlh->nlmsg_type), ct); |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 1115 | rcu_read_unlock(); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1116 | nf_ct_put(ct); |
| 1117 | if (err <= 0) |
| 1118 | goto free; |
| 1119 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1120 | err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).portid, MSG_DONTWAIT); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1121 | if (err < 0) |
| 1122 | goto out; |
| 1123 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1124 | return 0; |
| 1125 | |
| 1126 | free: |
| 1127 | kfree_skb(skb2); |
| 1128 | out: |
Pablo Neira Ayuso | f31e8d49 | 2011-01-13 14:19:55 +0100 | [diff] [blame] | 1129 | /* this avoids a loop in nfnetlink. */ |
| 1130 | return err == -EAGAIN ? -ENOBUFS : err; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1131 | } |
| 1132 | |
Pablo Neira Ayuso | d871bef | 2012-11-27 14:49:42 +0100 | [diff] [blame] | 1133 | static int ctnetlink_done_list(struct netlink_callback *cb) |
| 1134 | { |
| 1135 | if (cb->args[1]) |
| 1136 | nf_ct_put((struct nf_conn *)cb->args[1]); |
| 1137 | return 0; |
| 1138 | } |
| 1139 | |
| 1140 | static int |
| 1141 | ctnetlink_dump_list(struct sk_buff *skb, struct netlink_callback *cb, |
| 1142 | struct hlist_nulls_head *list) |
| 1143 | { |
| 1144 | struct nf_conn *ct, *last; |
| 1145 | struct nf_conntrack_tuple_hash *h; |
| 1146 | struct hlist_nulls_node *n; |
| 1147 | struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh); |
| 1148 | u_int8_t l3proto = nfmsg->nfgen_family; |
| 1149 | int res; |
| 1150 | |
| 1151 | if (cb->args[2]) |
| 1152 | return 0; |
| 1153 | |
| 1154 | spin_lock_bh(&nf_conntrack_lock); |
| 1155 | last = (struct nf_conn *)cb->args[1]; |
| 1156 | restart: |
| 1157 | hlist_nulls_for_each_entry(h, n, list, hnnode) { |
| 1158 | ct = nf_ct_tuplehash_to_ctrack(h); |
| 1159 | if (l3proto && nf_ct_l3num(ct) != l3proto) |
| 1160 | continue; |
| 1161 | if (cb->args[1]) { |
| 1162 | if (ct != last) |
| 1163 | continue; |
| 1164 | cb->args[1] = 0; |
| 1165 | } |
| 1166 | rcu_read_lock(); |
| 1167 | res = ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).portid, |
| 1168 | cb->nlh->nlmsg_seq, |
| 1169 | NFNL_MSG_TYPE(cb->nlh->nlmsg_type), |
| 1170 | ct); |
| 1171 | rcu_read_unlock(); |
| 1172 | if (res < 0) { |
| 1173 | nf_conntrack_get(&ct->ct_general); |
| 1174 | cb->args[1] = (unsigned long)ct; |
| 1175 | goto out; |
| 1176 | } |
| 1177 | } |
| 1178 | if (cb->args[1]) { |
| 1179 | cb->args[1] = 0; |
| 1180 | goto restart; |
| 1181 | } else |
| 1182 | cb->args[2] = 1; |
| 1183 | out: |
| 1184 | spin_unlock_bh(&nf_conntrack_lock); |
| 1185 | if (last) |
| 1186 | nf_ct_put(last); |
| 1187 | |
| 1188 | return skb->len; |
| 1189 | } |
| 1190 | |
| 1191 | static int |
| 1192 | ctnetlink_dump_dying(struct sk_buff *skb, struct netlink_callback *cb) |
| 1193 | { |
| 1194 | struct net *net = sock_net(skb->sk); |
| 1195 | |
| 1196 | return ctnetlink_dump_list(skb, cb, &net->ct.dying); |
| 1197 | } |
| 1198 | |
| 1199 | static int |
| 1200 | ctnetlink_get_ct_dying(struct sock *ctnl, struct sk_buff *skb, |
| 1201 | const struct nlmsghdr *nlh, |
| 1202 | const struct nlattr * const cda[]) |
| 1203 | { |
| 1204 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
| 1205 | struct netlink_dump_control c = { |
| 1206 | .dump = ctnetlink_dump_dying, |
| 1207 | .done = ctnetlink_done_list, |
| 1208 | }; |
| 1209 | return netlink_dump_start(ctnl, skb, nlh, &c); |
| 1210 | } |
| 1211 | |
| 1212 | return -EOPNOTSUPP; |
| 1213 | } |
| 1214 | |
| 1215 | static int |
| 1216 | ctnetlink_dump_unconfirmed(struct sk_buff *skb, struct netlink_callback *cb) |
| 1217 | { |
| 1218 | struct net *net = sock_net(skb->sk); |
| 1219 | |
| 1220 | return ctnetlink_dump_list(skb, cb, &net->ct.unconfirmed); |
| 1221 | } |
| 1222 | |
| 1223 | static int |
| 1224 | ctnetlink_get_ct_unconfirmed(struct sock *ctnl, struct sk_buff *skb, |
| 1225 | const struct nlmsghdr *nlh, |
| 1226 | const struct nlattr * const cda[]) |
| 1227 | { |
| 1228 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
| 1229 | struct netlink_dump_control c = { |
| 1230 | .dump = ctnetlink_dump_unconfirmed, |
| 1231 | .done = ctnetlink_done_list, |
| 1232 | }; |
| 1233 | return netlink_dump_start(ctnl, skb, nlh, &c); |
| 1234 | } |
| 1235 | |
| 1236 | return -EOPNOTSUPP; |
| 1237 | } |
| 1238 | |
Pablo Neira Ayuso | 6767184 | 2008-10-20 03:34:27 -0700 | [diff] [blame] | 1239 | #ifdef CONFIG_NF_NAT_NEEDED |
Ilpo Järvinen | bb5cf80 | 2008-01-05 23:11:31 -0800 | [diff] [blame] | 1240 | static int |
Pablo Neira Ayuso | e6a7d3c | 2008-10-14 11:58:31 -0700 | [diff] [blame] | 1241 | ctnetlink_parse_nat_setup(struct nf_conn *ct, |
| 1242 | enum nf_nat_manip_type manip, |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 1243 | const struct nlattr *attr) |
Pablo Neira Ayuso | e6a7d3c | 2008-10-14 11:58:31 -0700 | [diff] [blame] | 1244 | { |
| 1245 | typeof(nfnetlink_parse_nat_setup_hook) parse_nat_setup; |
Patrick McHardy | c7232c9 | 2012-08-26 19:14:06 +0200 | [diff] [blame] | 1246 | int err; |
Pablo Neira Ayuso | e6a7d3c | 2008-10-14 11:58:31 -0700 | [diff] [blame] | 1247 | |
| 1248 | parse_nat_setup = rcu_dereference(nfnetlink_parse_nat_setup_hook); |
| 1249 | if (!parse_nat_setup) { |
Johannes Berg | 95a5afc | 2008-10-16 15:24:51 -0700 | [diff] [blame] | 1250 | #ifdef CONFIG_MODULES |
Pablo Neira Ayuso | e6a7d3c | 2008-10-14 11:58:31 -0700 | [diff] [blame] | 1251 | rcu_read_unlock(); |
Pablo Neira Ayuso | c14b78e | 2013-02-05 01:50:26 +0100 | [diff] [blame] | 1252 | nfnl_unlock(NFNL_SUBSYS_CTNETLINK); |
Patrick McHardy | c7232c9 | 2012-08-26 19:14:06 +0200 | [diff] [blame] | 1253 | if (request_module("nf-nat") < 0) { |
Pablo Neira Ayuso | c14b78e | 2013-02-05 01:50:26 +0100 | [diff] [blame] | 1254 | nfnl_lock(NFNL_SUBSYS_CTNETLINK); |
Pablo Neira Ayuso | e6a7d3c | 2008-10-14 11:58:31 -0700 | [diff] [blame] | 1255 | rcu_read_lock(); |
| 1256 | return -EOPNOTSUPP; |
| 1257 | } |
Pablo Neira Ayuso | c14b78e | 2013-02-05 01:50:26 +0100 | [diff] [blame] | 1258 | nfnl_lock(NFNL_SUBSYS_CTNETLINK); |
Pablo Neira Ayuso | e6a7d3c | 2008-10-14 11:58:31 -0700 | [diff] [blame] | 1259 | rcu_read_lock(); |
| 1260 | if (nfnetlink_parse_nat_setup_hook) |
| 1261 | return -EAGAIN; |
| 1262 | #endif |
| 1263 | return -EOPNOTSUPP; |
| 1264 | } |
| 1265 | |
Patrick McHardy | c7232c9 | 2012-08-26 19:14:06 +0200 | [diff] [blame] | 1266 | err = parse_nat_setup(ct, manip, attr); |
| 1267 | if (err == -EAGAIN) { |
| 1268 | #ifdef CONFIG_MODULES |
| 1269 | rcu_read_unlock(); |
Pablo Neira Ayuso | c14b78e | 2013-02-05 01:50:26 +0100 | [diff] [blame] | 1270 | nfnl_unlock(NFNL_SUBSYS_CTNETLINK); |
Patrick McHardy | c7232c9 | 2012-08-26 19:14:06 +0200 | [diff] [blame] | 1271 | if (request_module("nf-nat-%u", nf_ct_l3num(ct)) < 0) { |
Pablo Neira Ayuso | c14b78e | 2013-02-05 01:50:26 +0100 | [diff] [blame] | 1272 | nfnl_lock(NFNL_SUBSYS_CTNETLINK); |
Patrick McHardy | c7232c9 | 2012-08-26 19:14:06 +0200 | [diff] [blame] | 1273 | rcu_read_lock(); |
| 1274 | return -EOPNOTSUPP; |
| 1275 | } |
Pablo Neira Ayuso | c14b78e | 2013-02-05 01:50:26 +0100 | [diff] [blame] | 1276 | nfnl_lock(NFNL_SUBSYS_CTNETLINK); |
Patrick McHardy | c7232c9 | 2012-08-26 19:14:06 +0200 | [diff] [blame] | 1277 | rcu_read_lock(); |
| 1278 | #else |
| 1279 | err = -EOPNOTSUPP; |
| 1280 | #endif |
| 1281 | } |
| 1282 | return err; |
Pablo Neira Ayuso | e6a7d3c | 2008-10-14 11:58:31 -0700 | [diff] [blame] | 1283 | } |
Pablo Neira Ayuso | 6767184 | 2008-10-20 03:34:27 -0700 | [diff] [blame] | 1284 | #endif |
Pablo Neira Ayuso | e6a7d3c | 2008-10-14 11:58:31 -0700 | [diff] [blame] | 1285 | |
| 1286 | static int |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 1287 | 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] | 1288 | { |
| 1289 | unsigned long d; |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 1290 | unsigned int status = ntohl(nla_get_be32(cda[CTA_STATUS])); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1291 | d = ct->status ^ status; |
| 1292 | |
| 1293 | if (d & (IPS_EXPECTED|IPS_CONFIRMED|IPS_DYING)) |
| 1294 | /* unchangeable */ |
Pablo Neira Ayuso | 0adf9d6 | 2008-06-09 15:56:20 -0700 | [diff] [blame] | 1295 | return -EBUSY; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1296 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1297 | if (d & IPS_SEEN_REPLY && !(status & IPS_SEEN_REPLY)) |
| 1298 | /* SEEN_REPLY bit can only be set */ |
Pablo Neira Ayuso | 0adf9d6 | 2008-06-09 15:56:20 -0700 | [diff] [blame] | 1299 | return -EBUSY; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1300 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1301 | if (d & IPS_ASSURED && !(status & IPS_ASSURED)) |
| 1302 | /* ASSURED bit can only be set */ |
Pablo Neira Ayuso | 0adf9d6 | 2008-06-09 15:56:20 -0700 | [diff] [blame] | 1303 | return -EBUSY; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1304 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1305 | /* Be careful here, modifying NAT bits can screw up things, |
| 1306 | * 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] | 1307 | * nf_nat_range. */ |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1308 | ct->status |= status & ~(IPS_NAT_DONE_MASK | IPS_NAT_MASK); |
| 1309 | return 0; |
| 1310 | } |
| 1311 | |
Pablo Neira Ayuso | e6a7d3c | 2008-10-14 11:58:31 -0700 | [diff] [blame] | 1312 | static int |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 1313 | 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] | 1314 | { |
| 1315 | #ifdef CONFIG_NF_NAT_NEEDED |
| 1316 | int ret; |
| 1317 | |
| 1318 | if (cda[CTA_NAT_DST]) { |
| 1319 | ret = ctnetlink_parse_nat_setup(ct, |
Patrick McHardy | cbc9f2f | 2011-12-23 13:59:49 +0100 | [diff] [blame] | 1320 | NF_NAT_MANIP_DST, |
Pablo Neira Ayuso | e6a7d3c | 2008-10-14 11:58:31 -0700 | [diff] [blame] | 1321 | cda[CTA_NAT_DST]); |
| 1322 | if (ret < 0) |
| 1323 | return ret; |
| 1324 | } |
| 1325 | if (cda[CTA_NAT_SRC]) { |
| 1326 | ret = ctnetlink_parse_nat_setup(ct, |
Patrick McHardy | cbc9f2f | 2011-12-23 13:59:49 +0100 | [diff] [blame] | 1327 | NF_NAT_MANIP_SRC, |
Pablo Neira Ayuso | e6a7d3c | 2008-10-14 11:58:31 -0700 | [diff] [blame] | 1328 | cda[CTA_NAT_SRC]); |
| 1329 | if (ret < 0) |
| 1330 | return ret; |
| 1331 | } |
| 1332 | return 0; |
| 1333 | #else |
| 1334 | return -EOPNOTSUPP; |
| 1335 | #endif |
| 1336 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1337 | |
| 1338 | static inline int |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 1339 | 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] | 1340 | { |
| 1341 | struct nf_conntrack_helper *helper; |
Harald Welte | dc808fe | 2006-03-20 17:56:32 -0800 | [diff] [blame] | 1342 | struct nf_conn_help *help = nfct_help(ct); |
Pablo Neira Ayuso | 29fe1b4 | 2009-04-22 02:26:37 -0700 | [diff] [blame] | 1343 | char *helpname = NULL; |
Pablo Neira Ayuso | ae243be | 2012-06-07 14:19:42 +0200 | [diff] [blame] | 1344 | struct nlattr *helpinfo = NULL; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1345 | int err; |
| 1346 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1347 | /* don't change helper of sibling connections */ |
| 1348 | if (ct->master) |
Pablo Neira Ayuso | 0adf9d6 | 2008-06-09 15:56:20 -0700 | [diff] [blame] | 1349 | return -EBUSY; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1350 | |
Pablo Neira Ayuso | ae243be | 2012-06-07 14:19:42 +0200 | [diff] [blame] | 1351 | err = ctnetlink_parse_help(cda[CTA_HELP], &helpname, &helpinfo); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1352 | if (err < 0) |
| 1353 | return err; |
| 1354 | |
Yasuyuki Kozakai | df293bb | 2007-05-10 14:15:58 -0700 | [diff] [blame] | 1355 | if (!strcmp(helpname, "")) { |
| 1356 | if (help && help->helper) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1357 | /* we had a helper before ... */ |
| 1358 | nf_ct_remove_expectations(ct); |
Stephen Hemminger | a9b3cd7 | 2011-08-01 16:19:00 +0000 | [diff] [blame] | 1359 | RCU_INIT_POINTER(help->helper, NULL); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1360 | } |
Yasuyuki Kozakai | df293bb | 2007-05-10 14:15:58 -0700 | [diff] [blame] | 1361 | |
| 1362 | return 0; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1363 | } |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1364 | |
Patrick McHardy | 794e687 | 2010-02-03 13:41:29 +0100 | [diff] [blame] | 1365 | helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct), |
| 1366 | nf_ct_protonum(ct)); |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1367 | if (helper == NULL) { |
| 1368 | #ifdef CONFIG_MODULES |
| 1369 | spin_unlock_bh(&nf_conntrack_lock); |
| 1370 | |
| 1371 | if (request_module("nfct-helper-%s", helpname) < 0) { |
| 1372 | spin_lock_bh(&nf_conntrack_lock); |
| 1373 | return -EOPNOTSUPP; |
| 1374 | } |
| 1375 | |
| 1376 | spin_lock_bh(&nf_conntrack_lock); |
Patrick McHardy | 794e687 | 2010-02-03 13:41:29 +0100 | [diff] [blame] | 1377 | helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct), |
| 1378 | nf_ct_protonum(ct)); |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1379 | if (helper) |
| 1380 | return -EAGAIN; |
| 1381 | #endif |
Pablo Neira Ayuso | 0adf9d6 | 2008-06-09 15:56:20 -0700 | [diff] [blame] | 1382 | return -EOPNOTSUPP; |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1383 | } |
Yasuyuki Kozakai | df293bb | 2007-05-10 14:15:58 -0700 | [diff] [blame] | 1384 | |
Yasuyuki Kozakai | ceceae1 | 2007-07-07 22:23:42 -0700 | [diff] [blame] | 1385 | if (help) { |
Pablo Neira Ayuso | ae243be | 2012-06-07 14:19:42 +0200 | [diff] [blame] | 1386 | if (help->helper == helper) { |
| 1387 | /* update private helper data if allowed. */ |
Pablo Neira Ayuso | 7be54ca | 2012-09-21 16:52:08 +0200 | [diff] [blame] | 1388 | if (helper->from_nlattr) |
Pablo Neira Ayuso | ae243be | 2012-06-07 14:19:42 +0200 | [diff] [blame] | 1389 | helper->from_nlattr(helpinfo, ct); |
Yasuyuki Kozakai | ceceae1 | 2007-07-07 22:23:42 -0700 | [diff] [blame] | 1390 | return 0; |
Pablo Neira Ayuso | fd7462d | 2012-06-18 17:29:53 +0200 | [diff] [blame] | 1391 | } else |
Yasuyuki Kozakai | ceceae1 | 2007-07-07 22:23:42 -0700 | [diff] [blame] | 1392 | return -EBUSY; |
Yasuyuki Kozakai | ceceae1 | 2007-07-07 22:23:42 -0700 | [diff] [blame] | 1393 | } |
Yasuyuki Kozakai | df293bb | 2007-05-10 14:15:58 -0700 | [diff] [blame] | 1394 | |
Pablo Neira Ayuso | fd7462d | 2012-06-18 17:29:53 +0200 | [diff] [blame] | 1395 | /* we cannot set a helper for an existing conntrack */ |
| 1396 | return -EOPNOTSUPP; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1397 | } |
| 1398 | |
| 1399 | static inline int |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 1400 | 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] | 1401 | { |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 1402 | u_int32_t timeout = ntohl(nla_get_be32(cda[CTA_TIMEOUT])); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1403 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1404 | if (!del_timer(&ct->timeout)) |
| 1405 | return -ETIME; |
| 1406 | |
| 1407 | ct->timeout.expires = jiffies + timeout * HZ; |
| 1408 | add_timer(&ct->timeout); |
| 1409 | |
| 1410 | return 0; |
| 1411 | } |
| 1412 | |
Patrick McHardy | d0b0268 | 2010-02-10 15:38:33 +0100 | [diff] [blame] | 1413 | static const struct nla_policy protoinfo_policy[CTA_PROTOINFO_MAX+1] = { |
| 1414 | [CTA_PROTOINFO_TCP] = { .type = NLA_NESTED }, |
| 1415 | [CTA_PROTOINFO_DCCP] = { .type = NLA_NESTED }, |
| 1416 | [CTA_PROTOINFO_SCTP] = { .type = NLA_NESTED }, |
| 1417 | }; |
| 1418 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1419 | static inline int |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 1420 | 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] | 1421 | { |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 1422 | const struct nlattr *attr = cda[CTA_PROTOINFO]; |
| 1423 | struct nlattr *tb[CTA_PROTOINFO_MAX+1]; |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 1424 | struct nf_conntrack_l4proto *l4proto; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1425 | int err = 0; |
| 1426 | |
Daniel Borkmann | 130ffbc | 2013-06-12 17:54:51 +0200 | [diff] [blame] | 1427 | err = nla_parse_nested(tb, CTA_PROTOINFO_MAX, attr, protoinfo_policy); |
| 1428 | if (err < 0) |
| 1429 | return err; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1430 | |
Florian Westphal | cd91566 | 2009-03-18 17:28:37 +0100 | [diff] [blame] | 1431 | rcu_read_lock(); |
| 1432 | 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] | 1433 | if (l4proto->from_nlattr) |
| 1434 | err = l4proto->from_nlattr(tb, ct); |
Florian Westphal | cd91566 | 2009-03-18 17:28:37 +0100 | [diff] [blame] | 1435 | rcu_read_unlock(); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1436 | |
| 1437 | return err; |
| 1438 | } |
| 1439 | |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 1440 | static const struct nla_policy seqadj_policy[CTA_SEQADJ_MAX+1] = { |
| 1441 | [CTA_SEQADJ_CORRECTION_POS] = { .type = NLA_U32 }, |
| 1442 | [CTA_SEQADJ_OFFSET_BEFORE] = { .type = NLA_U32 }, |
| 1443 | [CTA_SEQADJ_OFFSET_AFTER] = { .type = NLA_U32 }, |
Patrick McHardy | d0b0268 | 2010-02-10 15:38:33 +0100 | [diff] [blame] | 1444 | }; |
| 1445 | |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1446 | static inline int |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 1447 | change_seq_adj(struct nf_ct_seqadj *seq, const struct nlattr * const attr) |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1448 | { |
Daniel Borkmann | 130ffbc | 2013-06-12 17:54:51 +0200 | [diff] [blame] | 1449 | int err; |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 1450 | struct nlattr *cda[CTA_SEQADJ_MAX+1]; |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1451 | |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 1452 | err = nla_parse_nested(cda, CTA_SEQADJ_MAX, attr, seqadj_policy); |
Daniel Borkmann | 130ffbc | 2013-06-12 17:54:51 +0200 | [diff] [blame] | 1453 | if (err < 0) |
| 1454 | return err; |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1455 | |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 1456 | if (!cda[CTA_SEQADJ_CORRECTION_POS]) |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1457 | return -EINVAL; |
| 1458 | |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 1459 | seq->correction_pos = |
| 1460 | ntohl(nla_get_be32(cda[CTA_SEQADJ_CORRECTION_POS])); |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1461 | |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 1462 | if (!cda[CTA_SEQADJ_OFFSET_BEFORE]) |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1463 | return -EINVAL; |
| 1464 | |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 1465 | seq->offset_before = |
| 1466 | ntohl(nla_get_be32(cda[CTA_SEQADJ_OFFSET_BEFORE])); |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1467 | |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 1468 | if (!cda[CTA_SEQADJ_OFFSET_AFTER]) |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1469 | return -EINVAL; |
| 1470 | |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 1471 | seq->offset_after = |
| 1472 | ntohl(nla_get_be32(cda[CTA_SEQADJ_OFFSET_AFTER])); |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1473 | |
| 1474 | return 0; |
| 1475 | } |
| 1476 | |
| 1477 | static int |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 1478 | ctnetlink_change_seq_adj(struct nf_conn *ct, |
| 1479 | const struct nlattr * const cda[]) |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1480 | { |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 1481 | struct nf_conn_seqadj *seqadj = nfct_seqadj(ct); |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1482 | int ret = 0; |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1483 | |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 1484 | if (!seqadj) |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1485 | return 0; |
| 1486 | |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 1487 | if (cda[CTA_SEQ_ADJ_ORIG]) { |
| 1488 | ret = change_seq_adj(&seqadj->seq[IP_CT_DIR_ORIGINAL], |
| 1489 | cda[CTA_SEQ_ADJ_ORIG]); |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1490 | if (ret < 0) |
| 1491 | return ret; |
| 1492 | |
| 1493 | ct->status |= IPS_SEQ_ADJUST; |
| 1494 | } |
| 1495 | |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 1496 | if (cda[CTA_SEQ_ADJ_REPLY]) { |
| 1497 | ret = change_seq_adj(&seqadj->seq[IP_CT_DIR_REPLY], |
| 1498 | cda[CTA_SEQ_ADJ_REPLY]); |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1499 | if (ret < 0) |
| 1500 | return ret; |
| 1501 | |
| 1502 | ct->status |= IPS_SEQ_ADJUST; |
| 1503 | } |
| 1504 | |
| 1505 | return 0; |
| 1506 | } |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1507 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1508 | static int |
Florian Westphal | 9b21f6a | 2013-01-11 06:30:46 +0000 | [diff] [blame] | 1509 | ctnetlink_attach_labels(struct nf_conn *ct, const struct nlattr * const cda[]) |
| 1510 | { |
| 1511 | #ifdef CONFIG_NF_CONNTRACK_LABELS |
| 1512 | size_t len = nla_len(cda[CTA_LABELS]); |
| 1513 | const void *mask = cda[CTA_LABELS_MASK]; |
| 1514 | |
| 1515 | if (len & (sizeof(u32)-1)) /* must be multiple of u32 */ |
| 1516 | return -EINVAL; |
| 1517 | |
| 1518 | if (mask) { |
| 1519 | if (nla_len(cda[CTA_LABELS_MASK]) == 0 || |
| 1520 | nla_len(cda[CTA_LABELS_MASK]) != len) |
| 1521 | return -EINVAL; |
| 1522 | mask = nla_data(cda[CTA_LABELS_MASK]); |
| 1523 | } |
| 1524 | |
| 1525 | len /= sizeof(u32); |
| 1526 | |
| 1527 | return nf_connlabels_replace(ct, nla_data(cda[CTA_LABELS]), mask, len); |
| 1528 | #else |
| 1529 | return -EOPNOTSUPP; |
| 1530 | #endif |
| 1531 | } |
| 1532 | |
| 1533 | static int |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 1534 | ctnetlink_change_conntrack(struct nf_conn *ct, |
| 1535 | const struct nlattr * const cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1536 | { |
| 1537 | int err; |
| 1538 | |
Pablo Neira Ayuso | e098360 | 2009-03-16 15:27:22 +0100 | [diff] [blame] | 1539 | /* only allow NAT changes and master assignation for new conntracks */ |
| 1540 | if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST] || cda[CTA_TUPLE_MASTER]) |
| 1541 | return -EOPNOTSUPP; |
| 1542 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1543 | if (cda[CTA_HELP]) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1544 | err = ctnetlink_change_helper(ct, cda); |
| 1545 | if (err < 0) |
| 1546 | return err; |
| 1547 | } |
| 1548 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1549 | if (cda[CTA_TIMEOUT]) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1550 | err = ctnetlink_change_timeout(ct, cda); |
| 1551 | if (err < 0) |
| 1552 | return err; |
| 1553 | } |
| 1554 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1555 | if (cda[CTA_STATUS]) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1556 | err = ctnetlink_change_status(ct, cda); |
| 1557 | if (err < 0) |
| 1558 | return err; |
| 1559 | } |
| 1560 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1561 | if (cda[CTA_PROTOINFO]) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1562 | err = ctnetlink_change_protoinfo(ct, cda); |
| 1563 | if (err < 0) |
| 1564 | return err; |
| 1565 | } |
| 1566 | |
Martin Josefsson | bcd1e83 | 2006-04-01 02:23:21 -0800 | [diff] [blame] | 1567 | #if defined(CONFIG_NF_CONNTRACK_MARK) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1568 | if (cda[CTA_MARK]) |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 1569 | ct->mark = ntohl(nla_get_be32(cda[CTA_MARK])); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1570 | #endif |
| 1571 | |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 1572 | if (cda[CTA_SEQ_ADJ_ORIG] || cda[CTA_SEQ_ADJ_REPLY]) { |
| 1573 | err = ctnetlink_change_seq_adj(ct, cda); |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1574 | if (err < 0) |
| 1575 | return err; |
| 1576 | } |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 1577 | |
Florian Westphal | 9b21f6a | 2013-01-11 06:30:46 +0000 | [diff] [blame] | 1578 | if (cda[CTA_LABELS]) { |
| 1579 | err = ctnetlink_attach_labels(ct, cda); |
| 1580 | if (err < 0) |
| 1581 | return err; |
| 1582 | } |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1583 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1584 | return 0; |
| 1585 | } |
| 1586 | |
Pablo Neira Ayuso | f0a3c08 | 2009-03-16 15:28:09 +0100 | [diff] [blame] | 1587 | static struct nf_conn * |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 1588 | ctnetlink_create_conntrack(struct net *net, u16 zone, |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 1589 | const struct nlattr * const cda[], |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1590 | struct nf_conntrack_tuple *otuple, |
Pablo Neira Ayuso | 5faa1f4 | 2007-09-28 14:43:53 -0700 | [diff] [blame] | 1591 | struct nf_conntrack_tuple *rtuple, |
Pablo Neira Ayuso | 7ec4749 | 2009-03-16 15:25:46 +0100 | [diff] [blame] | 1592 | u8 u3) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1593 | { |
| 1594 | struct nf_conn *ct; |
| 1595 | int err = -EINVAL; |
Yasuyuki Kozakai | ceceae1 | 2007-07-07 22:23:42 -0700 | [diff] [blame] | 1596 | struct nf_conntrack_helper *helper; |
Pablo Neira Ayuso | 315c34d | 2011-04-21 10:55:07 +0200 | [diff] [blame] | 1597 | struct nf_conn_tstamp *tstamp; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1598 | |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 1599 | ct = nf_conntrack_alloc(net, zone, otuple, rtuple, GFP_ATOMIC); |
Julia Lawall | cd7fcbf | 2009-01-12 00:06:08 +0000 | [diff] [blame] | 1600 | if (IS_ERR(ct)) |
Pablo Neira Ayuso | f0a3c08 | 2009-03-16 15:28:09 +0100 | [diff] [blame] | 1601 | return ERR_PTR(-ENOMEM); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1602 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1603 | if (!cda[CTA_TIMEOUT]) |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1604 | goto err1; |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 1605 | ct->timeout.expires = ntohl(nla_get_be32(cda[CTA_TIMEOUT])); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1606 | |
| 1607 | ct->timeout.expires = jiffies + ct->timeout.expires * HZ; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1608 | |
Patrick McHardy | 58a3c9b | 2008-01-31 04:36:54 -0800 | [diff] [blame] | 1609 | rcu_read_lock(); |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1610 | if (cda[CTA_HELP]) { |
Pablo Neira Ayuso | 29fe1b4 | 2009-04-22 02:26:37 -0700 | [diff] [blame] | 1611 | char *helpname = NULL; |
Pablo Neira Ayuso | ae243be | 2012-06-07 14:19:42 +0200 | [diff] [blame] | 1612 | struct nlattr *helpinfo = NULL; |
| 1613 | |
| 1614 | err = ctnetlink_parse_help(cda[CTA_HELP], &helpname, &helpinfo); |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1615 | if (err < 0) |
| 1616 | goto err2; |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1617 | |
Patrick McHardy | 794e687 | 2010-02-03 13:41:29 +0100 | [diff] [blame] | 1618 | helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct), |
| 1619 | nf_ct_protonum(ct)); |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1620 | if (helper == NULL) { |
| 1621 | rcu_read_unlock(); |
| 1622 | #ifdef CONFIG_MODULES |
| 1623 | if (request_module("nfct-helper-%s", helpname) < 0) { |
| 1624 | err = -EOPNOTSUPP; |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1625 | goto err1; |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1626 | } |
| 1627 | |
| 1628 | rcu_read_lock(); |
Patrick McHardy | 794e687 | 2010-02-03 13:41:29 +0100 | [diff] [blame] | 1629 | helper = __nf_conntrack_helper_find(helpname, |
| 1630 | nf_ct_l3num(ct), |
| 1631 | nf_ct_protonum(ct)); |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1632 | if (helper) { |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1633 | err = -EAGAIN; |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1634 | goto err2; |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1635 | } |
| 1636 | rcu_read_unlock(); |
| 1637 | #endif |
| 1638 | err = -EOPNOTSUPP; |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1639 | goto err1; |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1640 | } else { |
| 1641 | struct nf_conn_help *help; |
| 1642 | |
Pablo Neira Ayuso | 1afc567 | 2012-06-07 12:11:50 +0200 | [diff] [blame] | 1643 | help = nf_ct_helper_ext_add(ct, helper, GFP_ATOMIC); |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1644 | if (help == NULL) { |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1645 | err = -ENOMEM; |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1646 | goto err2; |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1647 | } |
Pablo Neira Ayuso | ae243be | 2012-06-07 14:19:42 +0200 | [diff] [blame] | 1648 | /* set private helper data if allowed. */ |
Pablo Neira Ayuso | 7be54ca | 2012-09-21 16:52:08 +0200 | [diff] [blame] | 1649 | if (helper->from_nlattr) |
Pablo Neira Ayuso | ae243be | 2012-06-07 14:19:42 +0200 | [diff] [blame] | 1650 | helper->from_nlattr(helpinfo, ct); |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1651 | |
| 1652 | /* not in hash table yet so not strictly necessary */ |
Stephen Hemminger | a9b3cd7 | 2011-08-01 16:19:00 +0000 | [diff] [blame] | 1653 | RCU_INIT_POINTER(help->helper, helper); |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1654 | } |
| 1655 | } else { |
| 1656 | /* try an implicit helper assignation */ |
Patrick McHardy | b2a15a6 | 2010-02-03 14:13:03 +0100 | [diff] [blame] | 1657 | err = __nf_ct_try_assign_helper(ct, NULL, GFP_ATOMIC); |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1658 | if (err < 0) |
| 1659 | goto err2; |
Patrick McHarrdy | 3c158f7 | 2007-06-05 12:55:27 -0700 | [diff] [blame] | 1660 | } |
Yasuyuki Kozakai | dafc741 | 2006-11-27 10:25:32 -0800 | [diff] [blame] | 1661 | |
Pablo Neira Ayuso | a88e22a | 2010-02-19 14:24:39 +0100 | [diff] [blame] | 1662 | if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST]) { |
| 1663 | err = ctnetlink_change_nat(ct, cda); |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1664 | if (err < 0) |
| 1665 | goto err2; |
Pablo Neira Ayuso | 1575e7e | 2008-08-18 21:30:55 -0700 | [diff] [blame] | 1666 | } |
| 1667 | |
Pablo Neira Ayuso | a88e22a | 2010-02-19 14:24:39 +0100 | [diff] [blame] | 1668 | nf_ct_acct_ext_add(ct, GFP_ATOMIC); |
Pablo Neira Ayuso | a992ca2 | 2011-01-19 16:00:07 +0100 | [diff] [blame] | 1669 | nf_ct_tstamp_ext_add(ct, GFP_ATOMIC); |
Pablo Neira Ayuso | a88e22a | 2010-02-19 14:24:39 +0100 | [diff] [blame] | 1670 | nf_ct_ecache_ext_add(ct, 0, 0, GFP_ATOMIC); |
Florian Westphal | c539f01 | 2013-01-11 06:30:44 +0000 | [diff] [blame] | 1671 | nf_ct_labels_ext_add(ct); |
| 1672 | |
Pablo Neira Ayuso | a88e22a | 2010-02-19 14:24:39 +0100 | [diff] [blame] | 1673 | /* we must add conntrack extensions before confirmation. */ |
| 1674 | ct->status |= IPS_CONFIRMED; |
| 1675 | |
| 1676 | if (cda[CTA_STATUS]) { |
| 1677 | err = ctnetlink_change_status(ct, cda); |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1678 | if (err < 0) |
| 1679 | goto err2; |
Pablo Neira Ayuso | e6a7d3c | 2008-10-14 11:58:31 -0700 | [diff] [blame] | 1680 | } |
| 1681 | |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 1682 | if (cda[CTA_SEQ_ADJ_ORIG] || cda[CTA_SEQ_ADJ_REPLY]) { |
| 1683 | err = ctnetlink_change_seq_adj(ct, cda); |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1684 | if (err < 0) |
| 1685 | goto err2; |
Pablo Neira Ayuso | c969aa7 | 2009-02-09 14:33:57 -0800 | [diff] [blame] | 1686 | } |
Pablo Neira Ayuso | c969aa7 | 2009-02-09 14:33:57 -0800 | [diff] [blame] | 1687 | |
Changli Gao | e5fc9e7 | 2010-11-12 17:33:17 +0100 | [diff] [blame] | 1688 | memset(&ct->proto, 0, sizeof(ct->proto)); |
Pablo Neira Ayuso | 1575e7e | 2008-08-18 21:30:55 -0700 | [diff] [blame] | 1689 | if (cda[CTA_PROTOINFO]) { |
| 1690 | err = ctnetlink_change_protoinfo(ct, cda); |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1691 | if (err < 0) |
| 1692 | goto err2; |
Pablo Neira Ayuso | 1575e7e | 2008-08-18 21:30:55 -0700 | [diff] [blame] | 1693 | } |
| 1694 | |
Pablo Neira Ayuso | 1575e7e | 2008-08-18 21:30:55 -0700 | [diff] [blame] | 1695 | #if defined(CONFIG_NF_CONNTRACK_MARK) |
| 1696 | if (cda[CTA_MARK]) |
| 1697 | ct->mark = ntohl(nla_get_be32(cda[CTA_MARK])); |
| 1698 | #endif |
| 1699 | |
Pablo Neira Ayuso | 5faa1f4 | 2007-09-28 14:43:53 -0700 | [diff] [blame] | 1700 | /* setup master conntrack: this is a confirmed expectation */ |
Pablo Neira Ayuso | 7ec4749 | 2009-03-16 15:25:46 +0100 | [diff] [blame] | 1701 | if (cda[CTA_TUPLE_MASTER]) { |
| 1702 | struct nf_conntrack_tuple master; |
| 1703 | struct nf_conntrack_tuple_hash *master_h; |
| 1704 | struct nf_conn *master_ct; |
| 1705 | |
| 1706 | err = ctnetlink_parse_tuple(cda, &master, CTA_TUPLE_MASTER, u3); |
| 1707 | if (err < 0) |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1708 | goto err2; |
Pablo Neira Ayuso | 7ec4749 | 2009-03-16 15:25:46 +0100 | [diff] [blame] | 1709 | |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 1710 | master_h = nf_conntrack_find_get(net, zone, &master); |
Pablo Neira Ayuso | 7ec4749 | 2009-03-16 15:25:46 +0100 | [diff] [blame] | 1711 | if (master_h == NULL) { |
| 1712 | err = -ENOENT; |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1713 | goto err2; |
Pablo Neira Ayuso | 7ec4749 | 2009-03-16 15:25:46 +0100 | [diff] [blame] | 1714 | } |
| 1715 | master_ct = nf_ct_tuplehash_to_ctrack(master_h); |
Pablo Neira Ayuso | f2a8900 | 2007-12-12 10:34:29 -0800 | [diff] [blame] | 1716 | __set_bit(IPS_EXPECTED_BIT, &ct->status); |
Pablo Neira Ayuso | 5faa1f4 | 2007-09-28 14:43:53 -0700 | [diff] [blame] | 1717 | ct->master = master_ct; |
Pablo Neira Ayuso | f2a8900 | 2007-12-12 10:34:29 -0800 | [diff] [blame] | 1718 | } |
Pablo Neira Ayuso | 315c34d | 2011-04-21 10:55:07 +0200 | [diff] [blame] | 1719 | tstamp = nf_conn_tstamp_find(ct); |
| 1720 | if (tstamp) |
| 1721 | tstamp->start = ktime_to_ns(ktime_get_real()); |
Pablo Neira Ayuso | 5faa1f4 | 2007-09-28 14:43:53 -0700 | [diff] [blame] | 1722 | |
Jozsef Kadlecsik | 7d367e0 | 2012-02-24 11:45:49 +0100 | [diff] [blame] | 1723 | err = nf_conntrack_hash_check_insert(ct); |
| 1724 | if (err < 0) |
| 1725 | goto err2; |
| 1726 | |
Patrick McHardy | 58a3c9b | 2008-01-31 04:36:54 -0800 | [diff] [blame] | 1727 | rcu_read_unlock(); |
Yasuyuki Kozakai | dafc741 | 2006-11-27 10:25:32 -0800 | [diff] [blame] | 1728 | |
Pablo Neira Ayuso | f0a3c08 | 2009-03-16 15:28:09 +0100 | [diff] [blame] | 1729 | return ct; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1730 | |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1731 | err2: |
| 1732 | rcu_read_unlock(); |
| 1733 | err1: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1734 | nf_conntrack_free(ct); |
Pablo Neira Ayuso | f0a3c08 | 2009-03-16 15:28:09 +0100 | [diff] [blame] | 1735 | return ERR_PTR(err); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1736 | } |
| 1737 | |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1738 | static int |
| 1739 | ctnetlink_new_conntrack(struct sock *ctnl, struct sk_buff *skb, |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 1740 | const struct nlmsghdr *nlh, |
| 1741 | const struct nlattr * const cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1742 | { |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 1743 | struct net *net = sock_net(ctnl); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1744 | struct nf_conntrack_tuple otuple, rtuple; |
| 1745 | struct nf_conntrack_tuple_hash *h = NULL; |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 1746 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
Jozsef Kadlecsik | 7d367e0 | 2012-02-24 11:45:49 +0100 | [diff] [blame] | 1747 | struct nf_conn *ct; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1748 | u_int8_t u3 = nfmsg->nfgen_family; |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 1749 | u16 zone; |
| 1750 | int err; |
| 1751 | |
| 1752 | err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone); |
| 1753 | if (err < 0) |
| 1754 | return err; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1755 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1756 | if (cda[CTA_TUPLE_ORIG]) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1757 | err = ctnetlink_parse_tuple(cda, &otuple, CTA_TUPLE_ORIG, u3); |
| 1758 | if (err < 0) |
| 1759 | return err; |
| 1760 | } |
| 1761 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1762 | if (cda[CTA_TUPLE_REPLY]) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1763 | err = ctnetlink_parse_tuple(cda, &rtuple, CTA_TUPLE_REPLY, u3); |
| 1764 | if (err < 0) |
| 1765 | return err; |
| 1766 | } |
| 1767 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1768 | if (cda[CTA_TUPLE_ORIG]) |
Jozsef Kadlecsik | 7d367e0 | 2012-02-24 11:45:49 +0100 | [diff] [blame] | 1769 | h = nf_conntrack_find_get(net, zone, &otuple); |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1770 | else if (cda[CTA_TUPLE_REPLY]) |
Jozsef Kadlecsik | 7d367e0 | 2012-02-24 11:45:49 +0100 | [diff] [blame] | 1771 | h = nf_conntrack_find_get(net, zone, &rtuple); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1772 | |
| 1773 | if (h == NULL) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1774 | err = -ENOENT; |
Pablo Neira Ayuso | f0a3c08 | 2009-03-16 15:28:09 +0100 | [diff] [blame] | 1775 | if (nlh->nlmsg_flags & NLM_F_CREATE) { |
Pablo Neira Ayuso | fecc113 | 2009-05-05 17:48:26 +0200 | [diff] [blame] | 1776 | enum ip_conntrack_events events; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1777 | |
Florian Westphal | 442fad9 | 2013-02-11 23:22:38 +0000 | [diff] [blame] | 1778 | if (!cda[CTA_TUPLE_ORIG] || !cda[CTA_TUPLE_REPLY]) |
| 1779 | return -EINVAL; |
| 1780 | |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 1781 | ct = ctnetlink_create_conntrack(net, zone, cda, &otuple, |
Pablo Neira Ayuso | f0a3c08 | 2009-03-16 15:28:09 +0100 | [diff] [blame] | 1782 | &rtuple, u3); |
Jozsef Kadlecsik | 7d367e0 | 2012-02-24 11:45:49 +0100 | [diff] [blame] | 1783 | if (IS_ERR(ct)) |
| 1784 | return PTR_ERR(ct); |
| 1785 | |
Pablo Neira Ayuso | f0a3c08 | 2009-03-16 15:28:09 +0100 | [diff] [blame] | 1786 | err = 0; |
Pablo Neira Ayuso | fecc113 | 2009-05-05 17:48:26 +0200 | [diff] [blame] | 1787 | if (test_bit(IPS_EXPECTED_BIT, &ct->status)) |
| 1788 | events = IPCT_RELATED; |
| 1789 | else |
| 1790 | events = IPCT_NEW; |
| 1791 | |
Florian Westphal | 9b21f6a | 2013-01-11 06:30:46 +0000 | [diff] [blame] | 1792 | if (cda[CTA_LABELS] && |
| 1793 | ctnetlink_attach_labels(ct, cda) == 0) |
| 1794 | events |= (1 << IPCT_LABEL); |
| 1795 | |
Patrick McHardy | 858b3133 | 2010-02-03 13:48:53 +0100 | [diff] [blame] | 1796 | nf_conntrack_eventmask_report((1 << IPCT_REPLY) | |
| 1797 | (1 << IPCT_ASSURED) | |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 1798 | (1 << IPCT_HELPER) | |
| 1799 | (1 << IPCT_PROTOINFO) | |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 1800 | (1 << IPCT_SEQADJ) | |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 1801 | (1 << IPCT_MARK) | events, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1802 | ct, NETLINK_CB(skb).portid, |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 1803 | nlmsg_report(nlh)); |
Pablo Neira Ayuso | f0a3c08 | 2009-03-16 15:28:09 +0100 | [diff] [blame] | 1804 | nf_ct_put(ct); |
Jozsef Kadlecsik | 7d367e0 | 2012-02-24 11:45:49 +0100 | [diff] [blame] | 1805 | } |
Pablo Neira Ayuso | 5faa1f4 | 2007-09-28 14:43:53 -0700 | [diff] [blame] | 1806 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1807 | return err; |
| 1808 | } |
| 1809 | /* implicit 'else' */ |
| 1810 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1811 | err = -EEXIST; |
Jozsef Kadlecsik | 7d367e0 | 2012-02-24 11:45:49 +0100 | [diff] [blame] | 1812 | ct = nf_ct_tuplehash_to_ctrack(h); |
Pablo Neira Ayuso | ff4ca82 | 2007-08-07 18:11:26 -0700 | [diff] [blame] | 1813 | if (!(nlh->nlmsg_flags & NLM_F_EXCL)) { |
Jozsef Kadlecsik | 7d367e0 | 2012-02-24 11:45:49 +0100 | [diff] [blame] | 1814 | spin_lock_bh(&nf_conntrack_lock); |
Pablo Neira Ayuso | 19abb7b | 2008-11-18 11:56:20 +0100 | [diff] [blame] | 1815 | err = ctnetlink_change_conntrack(ct, cda); |
Jozsef Kadlecsik | 7d367e0 | 2012-02-24 11:45:49 +0100 | [diff] [blame] | 1816 | spin_unlock_bh(&nf_conntrack_lock); |
Pablo Neira Ayuso | 19abb7b | 2008-11-18 11:56:20 +0100 | [diff] [blame] | 1817 | if (err == 0) { |
Patrick McHardy | 858b3133 | 2010-02-03 13:48:53 +0100 | [diff] [blame] | 1818 | nf_conntrack_eventmask_report((1 << IPCT_REPLY) | |
| 1819 | (1 << IPCT_ASSURED) | |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 1820 | (1 << IPCT_HELPER) | |
Florian Westphal | 797a7d6 | 2013-06-21 16:51:30 +0200 | [diff] [blame] | 1821 | (1 << IPCT_LABEL) | |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 1822 | (1 << IPCT_PROTOINFO) | |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 1823 | (1 << IPCT_SEQADJ) | |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 1824 | (1 << IPCT_MARK), |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1825 | ct, NETLINK_CB(skb).portid, |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 1826 | nlmsg_report(nlh)); |
Jozsef Kadlecsik | 7d367e0 | 2012-02-24 11:45:49 +0100 | [diff] [blame] | 1827 | } |
Pablo Neira Ayuso | ff4ca82 | 2007-08-07 18:11:26 -0700 | [diff] [blame] | 1828 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1829 | |
Jozsef Kadlecsik | 7d367e0 | 2012-02-24 11:45:49 +0100 | [diff] [blame] | 1830 | nf_ct_put(ct); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1831 | return err; |
| 1832 | } |
| 1833 | |
Pablo Neira Ayuso | 392025f | 2012-06-26 20:27:09 +0200 | [diff] [blame] | 1834 | static int |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1835 | ctnetlink_ct_stat_cpu_fill_info(struct sk_buff *skb, u32 portid, u32 seq, |
Pablo Neira Ayuso | 392025f | 2012-06-26 20:27:09 +0200 | [diff] [blame] | 1836 | __u16 cpu, const struct ip_conntrack_stat *st) |
| 1837 | { |
| 1838 | struct nlmsghdr *nlh; |
| 1839 | struct nfgenmsg *nfmsg; |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1840 | unsigned int flags = portid ? NLM_F_MULTI : 0, event; |
Pablo Neira Ayuso | 392025f | 2012-06-26 20:27:09 +0200 | [diff] [blame] | 1841 | |
| 1842 | event = (NFNL_SUBSYS_CTNETLINK << 8 | IPCTNL_MSG_CT_GET_STATS_CPU); |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1843 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags); |
Pablo Neira Ayuso | 392025f | 2012-06-26 20:27:09 +0200 | [diff] [blame] | 1844 | if (nlh == NULL) |
| 1845 | goto nlmsg_failure; |
| 1846 | |
| 1847 | nfmsg = nlmsg_data(nlh); |
| 1848 | nfmsg->nfgen_family = AF_UNSPEC; |
| 1849 | nfmsg->version = NFNETLINK_V0; |
| 1850 | nfmsg->res_id = htons(cpu); |
| 1851 | |
| 1852 | if (nla_put_be32(skb, CTA_STATS_SEARCHED, htonl(st->searched)) || |
| 1853 | nla_put_be32(skb, CTA_STATS_FOUND, htonl(st->found)) || |
| 1854 | nla_put_be32(skb, CTA_STATS_NEW, htonl(st->new)) || |
| 1855 | nla_put_be32(skb, CTA_STATS_INVALID, htonl(st->invalid)) || |
| 1856 | nla_put_be32(skb, CTA_STATS_IGNORE, htonl(st->ignore)) || |
| 1857 | nla_put_be32(skb, CTA_STATS_DELETE, htonl(st->delete)) || |
| 1858 | nla_put_be32(skb, CTA_STATS_DELETE_LIST, htonl(st->delete_list)) || |
| 1859 | nla_put_be32(skb, CTA_STATS_INSERT, htonl(st->insert)) || |
| 1860 | nla_put_be32(skb, CTA_STATS_INSERT_FAILED, |
| 1861 | htonl(st->insert_failed)) || |
| 1862 | nla_put_be32(skb, CTA_STATS_DROP, htonl(st->drop)) || |
| 1863 | nla_put_be32(skb, CTA_STATS_EARLY_DROP, htonl(st->early_drop)) || |
| 1864 | nla_put_be32(skb, CTA_STATS_ERROR, htonl(st->error)) || |
| 1865 | nla_put_be32(skb, CTA_STATS_SEARCH_RESTART, |
| 1866 | htonl(st->search_restart))) |
| 1867 | goto nla_put_failure; |
| 1868 | |
| 1869 | nlmsg_end(skb, nlh); |
| 1870 | return skb->len; |
| 1871 | |
| 1872 | nla_put_failure: |
| 1873 | nlmsg_failure: |
| 1874 | nlmsg_cancel(skb, nlh); |
| 1875 | return -1; |
| 1876 | } |
| 1877 | |
| 1878 | static int |
| 1879 | ctnetlink_ct_stat_cpu_dump(struct sk_buff *skb, struct netlink_callback *cb) |
| 1880 | { |
| 1881 | int cpu; |
| 1882 | struct net *net = sock_net(skb->sk); |
| 1883 | |
| 1884 | if (cb->args[0] == nr_cpu_ids) |
| 1885 | return 0; |
| 1886 | |
| 1887 | for (cpu = cb->args[0]; cpu < nr_cpu_ids; cpu++) { |
| 1888 | const struct ip_conntrack_stat *st; |
| 1889 | |
| 1890 | if (!cpu_possible(cpu)) |
| 1891 | continue; |
| 1892 | |
| 1893 | st = per_cpu_ptr(net->ct.stat, cpu); |
| 1894 | if (ctnetlink_ct_stat_cpu_fill_info(skb, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1895 | NETLINK_CB(cb->skb).portid, |
Pablo Neira Ayuso | 392025f | 2012-06-26 20:27:09 +0200 | [diff] [blame] | 1896 | cb->nlh->nlmsg_seq, |
| 1897 | cpu, st) < 0) |
| 1898 | break; |
| 1899 | } |
| 1900 | cb->args[0] = cpu; |
| 1901 | |
| 1902 | return skb->len; |
| 1903 | } |
| 1904 | |
| 1905 | static int |
| 1906 | ctnetlink_stat_ct_cpu(struct sock *ctnl, struct sk_buff *skb, |
| 1907 | const struct nlmsghdr *nlh, |
| 1908 | const struct nlattr * const cda[]) |
| 1909 | { |
| 1910 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
| 1911 | struct netlink_dump_control c = { |
| 1912 | .dump = ctnetlink_ct_stat_cpu_dump, |
| 1913 | }; |
| 1914 | return netlink_dump_start(ctnl, skb, nlh, &c); |
| 1915 | } |
| 1916 | |
| 1917 | return 0; |
| 1918 | } |
| 1919 | |
| 1920 | static int |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1921 | ctnetlink_stat_ct_fill_info(struct sk_buff *skb, u32 portid, u32 seq, u32 type, |
Pablo Neira Ayuso | 392025f | 2012-06-26 20:27:09 +0200 | [diff] [blame] | 1922 | struct net *net) |
| 1923 | { |
| 1924 | struct nlmsghdr *nlh; |
| 1925 | struct nfgenmsg *nfmsg; |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1926 | unsigned int flags = portid ? NLM_F_MULTI : 0, event; |
Pablo Neira Ayuso | 392025f | 2012-06-26 20:27:09 +0200 | [diff] [blame] | 1927 | unsigned int nr_conntracks = atomic_read(&net->ct.count); |
| 1928 | |
| 1929 | event = (NFNL_SUBSYS_CTNETLINK << 8 | IPCTNL_MSG_CT_GET_STATS); |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1930 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags); |
Pablo Neira Ayuso | 392025f | 2012-06-26 20:27:09 +0200 | [diff] [blame] | 1931 | if (nlh == NULL) |
| 1932 | goto nlmsg_failure; |
| 1933 | |
| 1934 | nfmsg = nlmsg_data(nlh); |
| 1935 | nfmsg->nfgen_family = AF_UNSPEC; |
| 1936 | nfmsg->version = NFNETLINK_V0; |
| 1937 | nfmsg->res_id = 0; |
| 1938 | |
| 1939 | if (nla_put_be32(skb, CTA_STATS_GLOBAL_ENTRIES, htonl(nr_conntracks))) |
| 1940 | goto nla_put_failure; |
| 1941 | |
| 1942 | nlmsg_end(skb, nlh); |
| 1943 | return skb->len; |
| 1944 | |
| 1945 | nla_put_failure: |
| 1946 | nlmsg_failure: |
| 1947 | nlmsg_cancel(skb, nlh); |
| 1948 | return -1; |
| 1949 | } |
| 1950 | |
| 1951 | static int |
| 1952 | ctnetlink_stat_ct(struct sock *ctnl, struct sk_buff *skb, |
| 1953 | const struct nlmsghdr *nlh, |
| 1954 | const struct nlattr * const cda[]) |
| 1955 | { |
| 1956 | struct sk_buff *skb2; |
| 1957 | int err; |
| 1958 | |
| 1959 | skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
| 1960 | if (skb2 == NULL) |
| 1961 | return -ENOMEM; |
| 1962 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1963 | err = ctnetlink_stat_ct_fill_info(skb2, NETLINK_CB(skb).portid, |
Pablo Neira Ayuso | 392025f | 2012-06-26 20:27:09 +0200 | [diff] [blame] | 1964 | nlh->nlmsg_seq, |
| 1965 | NFNL_MSG_TYPE(nlh->nlmsg_type), |
| 1966 | sock_net(skb->sk)); |
| 1967 | if (err <= 0) |
| 1968 | goto free; |
| 1969 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1970 | err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).portid, MSG_DONTWAIT); |
Pablo Neira Ayuso | 392025f | 2012-06-26 20:27:09 +0200 | [diff] [blame] | 1971 | if (err < 0) |
| 1972 | goto out; |
| 1973 | |
| 1974 | return 0; |
| 1975 | |
| 1976 | free: |
| 1977 | kfree_skb(skb2); |
| 1978 | out: |
| 1979 | /* this avoids a loop in nfnetlink. */ |
| 1980 | return err == -EAGAIN ? -ENOBUFS : err; |
| 1981 | } |
| 1982 | |
Pablo Neira Ayuso | bd07793 | 2013-08-07 18:13:20 +0200 | [diff] [blame] | 1983 | static const struct nla_policy exp_nla_policy[CTA_EXPECT_MAX+1] = { |
| 1984 | [CTA_EXPECT_MASTER] = { .type = NLA_NESTED }, |
| 1985 | [CTA_EXPECT_TUPLE] = { .type = NLA_NESTED }, |
| 1986 | [CTA_EXPECT_MASK] = { .type = NLA_NESTED }, |
| 1987 | [CTA_EXPECT_TIMEOUT] = { .type = NLA_U32 }, |
| 1988 | [CTA_EXPECT_ID] = { .type = NLA_U32 }, |
| 1989 | [CTA_EXPECT_HELP_NAME] = { .type = NLA_NUL_STRING, |
| 1990 | .len = NF_CT_HELPER_NAME_LEN - 1 }, |
| 1991 | [CTA_EXPECT_ZONE] = { .type = NLA_U16 }, |
| 1992 | [CTA_EXPECT_FLAGS] = { .type = NLA_U32 }, |
| 1993 | [CTA_EXPECT_CLASS] = { .type = NLA_U32 }, |
| 1994 | [CTA_EXPECT_NAT] = { .type = NLA_NESTED }, |
| 1995 | [CTA_EXPECT_FN] = { .type = NLA_NUL_STRING }, |
| 1996 | }; |
| 1997 | |
| 1998 | static struct nf_conntrack_expect * |
| 1999 | ctnetlink_alloc_expect(const struct nlattr *const cda[], struct nf_conn *ct, |
| 2000 | struct nf_conntrack_helper *helper, |
| 2001 | struct nf_conntrack_tuple *tuple, |
| 2002 | struct nf_conntrack_tuple *mask); |
| 2003 | |
Pablo Neira Ayuso | 7c62234 | 2012-06-19 02:10:57 +0200 | [diff] [blame] | 2004 | #ifdef CONFIG_NETFILTER_NETLINK_QUEUE_CT |
Pablo Neira Ayuso | 9cb0176 | 2012-06-07 12:13:39 +0200 | [diff] [blame] | 2005 | static size_t |
| 2006 | ctnetlink_nfqueue_build_size(const struct nf_conn *ct) |
| 2007 | { |
| 2008 | return 3 * nla_total_size(0) /* CTA_TUPLE_ORIG|REPL|MASTER */ |
| 2009 | + 3 * nla_total_size(0) /* CTA_TUPLE_IP */ |
| 2010 | + 3 * nla_total_size(0) /* CTA_TUPLE_PROTO */ |
| 2011 | + 3 * nla_total_size(sizeof(u_int8_t)) /* CTA_PROTO_NUM */ |
| 2012 | + nla_total_size(sizeof(u_int32_t)) /* CTA_ID */ |
| 2013 | + nla_total_size(sizeof(u_int32_t)) /* CTA_STATUS */ |
| 2014 | + nla_total_size(sizeof(u_int32_t)) /* CTA_TIMEOUT */ |
| 2015 | + nla_total_size(0) /* CTA_PROTOINFO */ |
| 2016 | + nla_total_size(0) /* CTA_HELP */ |
| 2017 | + nla_total_size(NF_CT_HELPER_NAME_LEN) /* CTA_HELP_NAME */ |
| 2018 | + ctnetlink_secctx_size(ct) |
| 2019 | #ifdef CONFIG_NF_NAT_NEEDED |
| 2020 | + 2 * nla_total_size(0) /* CTA_NAT_SEQ_ADJ_ORIG|REPL */ |
| 2021 | + 6 * nla_total_size(sizeof(u_int32_t)) /* CTA_NAT_SEQ_OFFSET */ |
| 2022 | #endif |
| 2023 | #ifdef CONFIG_NF_CONNTRACK_MARK |
| 2024 | + nla_total_size(sizeof(u_int32_t)) /* CTA_MARK */ |
| 2025 | #endif |
| 2026 | + ctnetlink_proto_size(ct) |
| 2027 | ; |
| 2028 | } |
| 2029 | |
| 2030 | static int |
| 2031 | ctnetlink_nfqueue_build(struct sk_buff *skb, struct nf_conn *ct) |
| 2032 | { |
| 2033 | struct nlattr *nest_parms; |
| 2034 | |
| 2035 | rcu_read_lock(); |
| 2036 | nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED); |
| 2037 | if (!nest_parms) |
| 2038 | goto nla_put_failure; |
| 2039 | if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0) |
| 2040 | goto nla_put_failure; |
| 2041 | nla_nest_end(skb, nest_parms); |
| 2042 | |
| 2043 | nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED); |
| 2044 | if (!nest_parms) |
| 2045 | goto nla_put_failure; |
| 2046 | if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0) |
| 2047 | goto nla_put_failure; |
| 2048 | nla_nest_end(skb, nest_parms); |
| 2049 | |
| 2050 | if (nf_ct_zone(ct)) { |
| 2051 | if (nla_put_be16(skb, CTA_ZONE, htons(nf_ct_zone(ct)))) |
| 2052 | goto nla_put_failure; |
| 2053 | } |
| 2054 | |
| 2055 | if (ctnetlink_dump_id(skb, ct) < 0) |
| 2056 | goto nla_put_failure; |
| 2057 | |
| 2058 | if (ctnetlink_dump_status(skb, ct) < 0) |
| 2059 | goto nla_put_failure; |
| 2060 | |
| 2061 | if (ctnetlink_dump_timeout(skb, ct) < 0) |
| 2062 | goto nla_put_failure; |
| 2063 | |
| 2064 | if (ctnetlink_dump_protoinfo(skb, ct) < 0) |
| 2065 | goto nla_put_failure; |
| 2066 | |
| 2067 | if (ctnetlink_dump_helpinfo(skb, ct) < 0) |
| 2068 | goto nla_put_failure; |
| 2069 | |
| 2070 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
| 2071 | if (ct->secmark && ctnetlink_dump_secctx(skb, ct) < 0) |
| 2072 | goto nla_put_failure; |
| 2073 | #endif |
| 2074 | if (ct->master && ctnetlink_dump_master(skb, ct) < 0) |
| 2075 | goto nla_put_failure; |
| 2076 | |
| 2077 | if ((ct->status & IPS_SEQ_ADJUST) && |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 2078 | ctnetlink_dump_ct_seq_adj(skb, ct) < 0) |
Pablo Neira Ayuso | 9cb0176 | 2012-06-07 12:13:39 +0200 | [diff] [blame] | 2079 | goto nla_put_failure; |
| 2080 | |
| 2081 | #ifdef CONFIG_NF_CONNTRACK_MARK |
| 2082 | if (ct->mark && ctnetlink_dump_mark(skb, ct) < 0) |
| 2083 | goto nla_put_failure; |
| 2084 | #endif |
Florian Westphal | 0ceabd8 | 2013-01-11 06:30:45 +0000 | [diff] [blame] | 2085 | if (ctnetlink_dump_labels(skb, ct) < 0) |
| 2086 | goto nla_put_failure; |
Pablo Neira Ayuso | 9cb0176 | 2012-06-07 12:13:39 +0200 | [diff] [blame] | 2087 | rcu_read_unlock(); |
| 2088 | return 0; |
| 2089 | |
| 2090 | nla_put_failure: |
| 2091 | rcu_read_unlock(); |
| 2092 | return -ENOSPC; |
| 2093 | } |
| 2094 | |
| 2095 | static int |
| 2096 | ctnetlink_nfqueue_parse_ct(const struct nlattr *cda[], struct nf_conn *ct) |
| 2097 | { |
| 2098 | int err; |
| 2099 | |
| 2100 | if (cda[CTA_TIMEOUT]) { |
| 2101 | err = ctnetlink_change_timeout(ct, cda); |
| 2102 | if (err < 0) |
| 2103 | return err; |
| 2104 | } |
| 2105 | if (cda[CTA_STATUS]) { |
| 2106 | err = ctnetlink_change_status(ct, cda); |
| 2107 | if (err < 0) |
| 2108 | return err; |
| 2109 | } |
| 2110 | if (cda[CTA_HELP]) { |
| 2111 | err = ctnetlink_change_helper(ct, cda); |
| 2112 | if (err < 0) |
| 2113 | return err; |
| 2114 | } |
Florian Westphal | 9b21f6a | 2013-01-11 06:30:46 +0000 | [diff] [blame] | 2115 | if (cda[CTA_LABELS]) { |
| 2116 | err = ctnetlink_attach_labels(ct, cda); |
| 2117 | if (err < 0) |
| 2118 | return err; |
| 2119 | } |
Pablo Neira Ayuso | 9cb0176 | 2012-06-07 12:13:39 +0200 | [diff] [blame] | 2120 | #if defined(CONFIG_NF_CONNTRACK_MARK) |
Florian Westphal | 534473c | 2013-12-19 18:25:15 +0100 | [diff] [blame^] | 2121 | if (cda[CTA_MARK]) { |
| 2122 | u32 mask = 0, mark, newmark; |
| 2123 | if (cda[CTA_MARK_MASK]) |
| 2124 | mask = ~ntohl(nla_get_be32(cda[CTA_MARK_MASK])); |
| 2125 | |
| 2126 | mark = ntohl(nla_get_be32(cda[CTA_MARK])); |
| 2127 | newmark = (ct->mark & mask) ^ mark; |
| 2128 | if (newmark != ct->mark) |
| 2129 | ct->mark = newmark; |
| 2130 | } |
Pablo Neira Ayuso | 9cb0176 | 2012-06-07 12:13:39 +0200 | [diff] [blame] | 2131 | #endif |
| 2132 | return 0; |
| 2133 | } |
| 2134 | |
| 2135 | static int |
| 2136 | ctnetlink_nfqueue_parse(const struct nlattr *attr, struct nf_conn *ct) |
| 2137 | { |
| 2138 | struct nlattr *cda[CTA_MAX+1]; |
Pablo Neira Ayuso | 68e035c | 2012-08-14 12:47:37 +0200 | [diff] [blame] | 2139 | int ret; |
Pablo Neira Ayuso | 9cb0176 | 2012-06-07 12:13:39 +0200 | [diff] [blame] | 2140 | |
Daniel Borkmann | 130ffbc | 2013-06-12 17:54:51 +0200 | [diff] [blame] | 2141 | ret = nla_parse_nested(cda, CTA_MAX, attr, ct_nla_policy); |
| 2142 | if (ret < 0) |
| 2143 | return ret; |
Pablo Neira Ayuso | 9cb0176 | 2012-06-07 12:13:39 +0200 | [diff] [blame] | 2144 | |
Pablo Neira Ayuso | 68e035c | 2012-08-14 12:47:37 +0200 | [diff] [blame] | 2145 | spin_lock_bh(&nf_conntrack_lock); |
| 2146 | ret = ctnetlink_nfqueue_parse_ct((const struct nlattr **)cda, ct); |
| 2147 | spin_unlock_bh(&nf_conntrack_lock); |
| 2148 | |
| 2149 | return ret; |
Pablo Neira Ayuso | 9cb0176 | 2012-06-07 12:13:39 +0200 | [diff] [blame] | 2150 | } |
| 2151 | |
Pablo Neira Ayuso | bd07793 | 2013-08-07 18:13:20 +0200 | [diff] [blame] | 2152 | static int ctnetlink_nfqueue_exp_parse(const struct nlattr * const *cda, |
| 2153 | const struct nf_conn *ct, |
| 2154 | struct nf_conntrack_tuple *tuple, |
| 2155 | struct nf_conntrack_tuple *mask) |
| 2156 | { |
| 2157 | int err; |
| 2158 | |
| 2159 | err = ctnetlink_parse_tuple(cda, tuple, CTA_EXPECT_TUPLE, |
| 2160 | nf_ct_l3num(ct)); |
| 2161 | if (err < 0) |
| 2162 | return err; |
| 2163 | |
| 2164 | return ctnetlink_parse_tuple(cda, mask, CTA_EXPECT_MASK, |
| 2165 | nf_ct_l3num(ct)); |
| 2166 | } |
| 2167 | |
| 2168 | static int |
| 2169 | ctnetlink_nfqueue_attach_expect(const struct nlattr *attr, struct nf_conn *ct, |
| 2170 | u32 portid, u32 report) |
| 2171 | { |
| 2172 | struct nlattr *cda[CTA_EXPECT_MAX+1]; |
| 2173 | struct nf_conntrack_tuple tuple, mask; |
Florian Westphal | b7e092c | 2013-08-27 11:47:26 +0200 | [diff] [blame] | 2174 | struct nf_conntrack_helper *helper = NULL; |
Pablo Neira Ayuso | bd07793 | 2013-08-07 18:13:20 +0200 | [diff] [blame] | 2175 | struct nf_conntrack_expect *exp; |
| 2176 | int err; |
| 2177 | |
| 2178 | err = nla_parse_nested(cda, CTA_EXPECT_MAX, attr, exp_nla_policy); |
| 2179 | if (err < 0) |
| 2180 | return err; |
| 2181 | |
| 2182 | err = ctnetlink_nfqueue_exp_parse((const struct nlattr * const *)cda, |
| 2183 | ct, &tuple, &mask); |
| 2184 | if (err < 0) |
| 2185 | return err; |
| 2186 | |
| 2187 | if (cda[CTA_EXPECT_HELP_NAME]) { |
| 2188 | const char *helpname = nla_data(cda[CTA_EXPECT_HELP_NAME]); |
| 2189 | |
| 2190 | helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct), |
| 2191 | nf_ct_protonum(ct)); |
| 2192 | if (helper == NULL) |
| 2193 | return -EOPNOTSUPP; |
| 2194 | } |
| 2195 | |
| 2196 | exp = ctnetlink_alloc_expect((const struct nlattr * const *)cda, ct, |
| 2197 | helper, &tuple, &mask); |
| 2198 | if (IS_ERR(exp)) |
| 2199 | return PTR_ERR(exp); |
| 2200 | |
| 2201 | err = nf_ct_expect_related_report(exp, portid, report); |
| 2202 | if (err < 0) { |
| 2203 | nf_ct_expect_put(exp); |
| 2204 | return err; |
| 2205 | } |
| 2206 | |
| 2207 | return 0; |
| 2208 | } |
| 2209 | |
Pablo Neira Ayuso | 9cb0176 | 2012-06-07 12:13:39 +0200 | [diff] [blame] | 2210 | static struct nfq_ct_hook ctnetlink_nfqueue_hook = { |
| 2211 | .build_size = ctnetlink_nfqueue_build_size, |
| 2212 | .build = ctnetlink_nfqueue_build, |
| 2213 | .parse = ctnetlink_nfqueue_parse, |
Pablo Neira Ayuso | bd07793 | 2013-08-07 18:13:20 +0200 | [diff] [blame] | 2214 | .attach_expect = ctnetlink_nfqueue_attach_expect, |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 2215 | .seq_adjust = nf_ct_tcp_seqadj_set, |
Pablo Neira Ayuso | 9cb0176 | 2012-06-07 12:13:39 +0200 | [diff] [blame] | 2216 | }; |
Pablo Neira Ayuso | 7c62234 | 2012-06-19 02:10:57 +0200 | [diff] [blame] | 2217 | #endif /* CONFIG_NETFILTER_NETLINK_QUEUE_CT */ |
Pablo Neira Ayuso | 9cb0176 | 2012-06-07 12:13:39 +0200 | [diff] [blame] | 2218 | |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 2219 | /*********************************************************************** |
| 2220 | * EXPECT |
| 2221 | ***********************************************************************/ |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2222 | |
| 2223 | static inline int |
| 2224 | ctnetlink_exp_dump_tuple(struct sk_buff *skb, |
| 2225 | const struct nf_conntrack_tuple *tuple, |
| 2226 | enum ctattr_expect type) |
| 2227 | { |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2228 | struct nlattr *nest_parms; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 2229 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2230 | nest_parms = nla_nest_start(skb, type | NLA_F_NESTED); |
| 2231 | if (!nest_parms) |
| 2232 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2233 | if (ctnetlink_dump_tuples(skb, tuple) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2234 | goto nla_put_failure; |
| 2235 | nla_nest_end(skb, nest_parms); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2236 | |
| 2237 | return 0; |
| 2238 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2239 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2240 | return -1; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 2241 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2242 | |
| 2243 | static inline int |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 2244 | ctnetlink_exp_dump_mask(struct sk_buff *skb, |
| 2245 | const struct nf_conntrack_tuple *tuple, |
Patrick McHardy | d4156e8 | 2007-07-07 22:31:32 -0700 | [diff] [blame] | 2246 | const struct nf_conntrack_tuple_mask *mask) |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 2247 | { |
| 2248 | int ret; |
| 2249 | struct nf_conntrack_l3proto *l3proto; |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 2250 | struct nf_conntrack_l4proto *l4proto; |
Patrick McHardy | d4156e8 | 2007-07-07 22:31:32 -0700 | [diff] [blame] | 2251 | struct nf_conntrack_tuple m; |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2252 | struct nlattr *nest_parms; |
Patrick McHardy | d4156e8 | 2007-07-07 22:31:32 -0700 | [diff] [blame] | 2253 | |
| 2254 | memset(&m, 0xFF, sizeof(m)); |
Patrick McHardy | d4156e8 | 2007-07-07 22:31:32 -0700 | [diff] [blame] | 2255 | memcpy(&m.src.u3, &mask->src.u3, sizeof(m.src.u3)); |
Patrick McHardy | e578756 | 2010-01-26 17:04:02 +0100 | [diff] [blame] | 2256 | m.src.u.all = mask->src.u.all; |
| 2257 | m.dst.protonum = tuple->dst.protonum; |
Patrick McHardy | d4156e8 | 2007-07-07 22:31:32 -0700 | [diff] [blame] | 2258 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2259 | nest_parms = nla_nest_start(skb, CTA_EXPECT_MASK | NLA_F_NESTED); |
| 2260 | if (!nest_parms) |
| 2261 | goto nla_put_failure; |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 2262 | |
Hans Schillstrom | 3b988ec | 2012-03-05 02:24:29 +0000 | [diff] [blame] | 2263 | rcu_read_lock(); |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 2264 | l3proto = __nf_ct_l3proto_find(tuple->src.l3num); |
Patrick McHardy | d4156e8 | 2007-07-07 22:31:32 -0700 | [diff] [blame] | 2265 | ret = ctnetlink_dump_tuples_ip(skb, &m, l3proto); |
Hans Schillstrom | 3b988ec | 2012-03-05 02:24:29 +0000 | [diff] [blame] | 2266 | if (ret >= 0) { |
| 2267 | l4proto = __nf_ct_l4proto_find(tuple->src.l3num, |
| 2268 | tuple->dst.protonum); |
Patrick McHardy | d4156e8 | 2007-07-07 22:31:32 -0700 | [diff] [blame] | 2269 | ret = ctnetlink_dump_tuples_proto(skb, &m, l4proto); |
Hans Schillstrom | 3b988ec | 2012-03-05 02:24:29 +0000 | [diff] [blame] | 2270 | } |
| 2271 | rcu_read_unlock(); |
| 2272 | |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 2273 | if (unlikely(ret < 0)) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2274 | goto nla_put_failure; |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 2275 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2276 | nla_nest_end(skb, nest_parms); |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 2277 | |
| 2278 | return 0; |
| 2279 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2280 | nla_put_failure: |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 2281 | return -1; |
| 2282 | } |
| 2283 | |
Patrick McHardy | c7232c9 | 2012-08-26 19:14:06 +0200 | [diff] [blame] | 2284 | static const union nf_inet_addr any_addr; |
| 2285 | |
Ilpo Järvinen | bb5cf80 | 2008-01-05 23:11:31 -0800 | [diff] [blame] | 2286 | static int |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2287 | ctnetlink_exp_dump_expect(struct sk_buff *skb, |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 2288 | const struct nf_conntrack_expect *exp) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2289 | { |
| 2290 | struct nf_conn *master = exp->master; |
Xi Wang | c121638 | 2011-12-30 10:40:17 -0500 | [diff] [blame] | 2291 | long timeout = ((long)exp->timeout.expires - (long)jiffies) / HZ; |
Pablo Neira Ayuso | bc01befd | 2010-09-28 21:06:34 +0200 | [diff] [blame] | 2292 | struct nf_conn_help *help; |
Pablo Neira Ayuso | 076a0ca | 2012-02-05 03:41:52 +0100 | [diff] [blame] | 2293 | #ifdef CONFIG_NF_NAT_NEEDED |
| 2294 | struct nlattr *nest_parms; |
| 2295 | struct nf_conntrack_tuple nat_tuple = {}; |
| 2296 | #endif |
Pablo Neira Ayuso | 544d5c7 | 2012-02-05 03:44:51 +0100 | [diff] [blame] | 2297 | struct nf_ct_helper_expectfn *expfn; |
| 2298 | |
Patrick McHardy | d978e5d | 2007-12-17 22:37:03 -0800 | [diff] [blame] | 2299 | if (timeout < 0) |
| 2300 | timeout = 0; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2301 | |
| 2302 | if (ctnetlink_exp_dump_tuple(skb, &exp->tuple, CTA_EXPECT_TUPLE) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2303 | goto nla_put_failure; |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 2304 | if (ctnetlink_exp_dump_mask(skb, &exp->tuple, &exp->mask) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2305 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2306 | if (ctnetlink_exp_dump_tuple(skb, |
| 2307 | &master->tuplehash[IP_CT_DIR_ORIGINAL].tuple, |
| 2308 | CTA_EXPECT_MASTER) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2309 | goto nla_put_failure; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 2310 | |
Pablo Neira Ayuso | 076a0ca | 2012-02-05 03:41:52 +0100 | [diff] [blame] | 2311 | #ifdef CONFIG_NF_NAT_NEEDED |
Patrick McHardy | c7232c9 | 2012-08-26 19:14:06 +0200 | [diff] [blame] | 2312 | if (!nf_inet_addr_cmp(&exp->saved_addr, &any_addr) || |
| 2313 | exp->saved_proto.all) { |
Pablo Neira Ayuso | 076a0ca | 2012-02-05 03:41:52 +0100 | [diff] [blame] | 2314 | nest_parms = nla_nest_start(skb, CTA_EXPECT_NAT | NLA_F_NESTED); |
| 2315 | if (!nest_parms) |
| 2316 | goto nla_put_failure; |
| 2317 | |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 2318 | if (nla_put_be32(skb, CTA_EXPECT_NAT_DIR, htonl(exp->dir))) |
| 2319 | goto nla_put_failure; |
Pablo Neira Ayuso | 076a0ca | 2012-02-05 03:41:52 +0100 | [diff] [blame] | 2320 | |
| 2321 | nat_tuple.src.l3num = nf_ct_l3num(master); |
Patrick McHardy | c7232c9 | 2012-08-26 19:14:06 +0200 | [diff] [blame] | 2322 | nat_tuple.src.u3 = exp->saved_addr; |
Pablo Neira Ayuso | 076a0ca | 2012-02-05 03:41:52 +0100 | [diff] [blame] | 2323 | nat_tuple.dst.protonum = nf_ct_protonum(master); |
| 2324 | nat_tuple.src.u = exp->saved_proto; |
| 2325 | |
| 2326 | if (ctnetlink_exp_dump_tuple(skb, &nat_tuple, |
| 2327 | CTA_EXPECT_NAT_TUPLE) < 0) |
| 2328 | goto nla_put_failure; |
| 2329 | nla_nest_end(skb, nest_parms); |
| 2330 | } |
| 2331 | #endif |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 2332 | if (nla_put_be32(skb, CTA_EXPECT_TIMEOUT, htonl(timeout)) || |
| 2333 | nla_put_be32(skb, CTA_EXPECT_ID, htonl((unsigned long)exp)) || |
| 2334 | nla_put_be32(skb, CTA_EXPECT_FLAGS, htonl(exp->flags)) || |
| 2335 | nla_put_be32(skb, CTA_EXPECT_CLASS, htonl(exp->class))) |
| 2336 | goto nla_put_failure; |
Pablo Neira Ayuso | bc01befd | 2010-09-28 21:06:34 +0200 | [diff] [blame] | 2337 | help = nfct_help(master); |
| 2338 | if (help) { |
| 2339 | struct nf_conntrack_helper *helper; |
| 2340 | |
| 2341 | helper = rcu_dereference(help->helper); |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 2342 | if (helper && |
| 2343 | nla_put_string(skb, CTA_EXPECT_HELP_NAME, helper->name)) |
| 2344 | goto nla_put_failure; |
Pablo Neira Ayuso | bc01befd | 2010-09-28 21:06:34 +0200 | [diff] [blame] | 2345 | } |
Pablo Neira Ayuso | 544d5c7 | 2012-02-05 03:44:51 +0100 | [diff] [blame] | 2346 | expfn = nf_ct_helper_expectfn_find_by_symbol(exp->expectfn); |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 2347 | if (expfn != NULL && |
| 2348 | nla_put_string(skb, CTA_EXPECT_FN, expfn->name)) |
| 2349 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2350 | |
| 2351 | return 0; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 2352 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2353 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2354 | return -1; |
| 2355 | } |
| 2356 | |
| 2357 | static int |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2358 | ctnetlink_exp_fill_info(struct sk_buff *skb, u32 portid, u32 seq, |
Pablo Neira Ayuso | 8b0a231 | 2009-06-02 20:03:34 +0200 | [diff] [blame] | 2359 | int event, const struct nf_conntrack_expect *exp) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2360 | { |
| 2361 | struct nlmsghdr *nlh; |
| 2362 | struct nfgenmsg *nfmsg; |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2363 | unsigned int flags = portid ? NLM_F_MULTI : 0; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2364 | |
| 2365 | event |= NFNL_SUBSYS_CTNETLINK_EXP << 8; |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2366 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags); |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 2367 | if (nlh == NULL) |
| 2368 | goto nlmsg_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2369 | |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 2370 | nfmsg = nlmsg_data(nlh); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2371 | nfmsg->nfgen_family = exp->tuple.src.l3num; |
| 2372 | nfmsg->version = NFNETLINK_V0; |
| 2373 | nfmsg->res_id = 0; |
| 2374 | |
| 2375 | if (ctnetlink_exp_dump_expect(skb, exp) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2376 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2377 | |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 2378 | nlmsg_end(skb, nlh); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2379 | return skb->len; |
| 2380 | |
| 2381 | nlmsg_failure: |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2382 | nla_put_failure: |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 2383 | nlmsg_cancel(skb, nlh); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2384 | return -1; |
| 2385 | } |
| 2386 | |
| 2387 | #ifdef CONFIG_NF_CONNTRACK_EVENTS |
Pablo Neira Ayuso | e34d5c1 | 2009-06-03 10:32:06 +0200 | [diff] [blame] | 2388 | static int |
| 2389 | ctnetlink_expect_event(unsigned int events, struct nf_exp_event *item) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2390 | { |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 2391 | struct nf_conntrack_expect *exp = item->exp; |
| 2392 | struct net *net = nf_ct_exp_net(exp); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2393 | struct nlmsghdr *nlh; |
| 2394 | struct nfgenmsg *nfmsg; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2395 | struct sk_buff *skb; |
Pablo Neira Ayuso | ebbf41d | 2010-10-19 10:19:06 +0200 | [diff] [blame] | 2396 | unsigned int type, group; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2397 | int flags = 0; |
| 2398 | |
Pablo Neira Ayuso | ebbf41d | 2010-10-19 10:19:06 +0200 | [diff] [blame] | 2399 | if (events & (1 << IPEXP_DESTROY)) { |
| 2400 | type = IPCTNL_MSG_EXP_DELETE; |
| 2401 | group = NFNLGRP_CONNTRACK_EXP_DESTROY; |
| 2402 | } else if (events & (1 << IPEXP_NEW)) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2403 | type = IPCTNL_MSG_EXP_NEW; |
| 2404 | flags = NLM_F_CREATE|NLM_F_EXCL; |
Pablo Neira Ayuso | ebbf41d | 2010-10-19 10:19:06 +0200 | [diff] [blame] | 2405 | group = NFNLGRP_CONNTRACK_EXP_NEW; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2406 | } else |
Pablo Neira Ayuso | e34d5c1 | 2009-06-03 10:32:06 +0200 | [diff] [blame] | 2407 | return 0; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2408 | |
Pablo Neira Ayuso | ebbf41d | 2010-10-19 10:19:06 +0200 | [diff] [blame] | 2409 | if (!item->report && !nfnetlink_has_listeners(net, group)) |
Pablo Neira Ayuso | e34d5c1 | 2009-06-03 10:32:06 +0200 | [diff] [blame] | 2410 | return 0; |
Pablo Neira Ayuso | b3a27bf | 2006-08-22 00:32:05 -0700 | [diff] [blame] | 2411 | |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 2412 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
| 2413 | if (skb == NULL) |
Pablo Neira Ayuso | 150ace0 | 2009-04-17 17:47:31 +0200 | [diff] [blame] | 2414 | goto errout; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2415 | |
Marcus Sundberg | b633ad5 | 2006-02-04 02:11:09 -0800 | [diff] [blame] | 2416 | type |= NFNL_SUBSYS_CTNETLINK_EXP << 8; |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2417 | nlh = nlmsg_put(skb, item->portid, 0, type, sizeof(*nfmsg), flags); |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 2418 | if (nlh == NULL) |
| 2419 | goto nlmsg_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2420 | |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 2421 | nfmsg = nlmsg_data(nlh); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2422 | nfmsg->nfgen_family = exp->tuple.src.l3num; |
| 2423 | nfmsg->version = NFNETLINK_V0; |
| 2424 | nfmsg->res_id = 0; |
| 2425 | |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 2426 | rcu_read_lock(); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2427 | if (ctnetlink_exp_dump_expect(skb, exp) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2428 | goto nla_put_failure; |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 2429 | rcu_read_unlock(); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2430 | |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 2431 | nlmsg_end(skb, nlh); |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2432 | nfnetlink_send(skb, net, item->portid, group, item->report, GFP_ATOMIC); |
Pablo Neira Ayuso | e34d5c1 | 2009-06-03 10:32:06 +0200 | [diff] [blame] | 2433 | return 0; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2434 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2435 | nla_put_failure: |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 2436 | rcu_read_unlock(); |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 2437 | nlmsg_cancel(skb, nlh); |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 2438 | nlmsg_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2439 | kfree_skb(skb); |
Pablo Neira Ayuso | 150ace0 | 2009-04-17 17:47:31 +0200 | [diff] [blame] | 2440 | errout: |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 2441 | nfnetlink_set_err(net, 0, 0, -ENOBUFS); |
Pablo Neira Ayuso | e34d5c1 | 2009-06-03 10:32:06 +0200 | [diff] [blame] | 2442 | return 0; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2443 | } |
| 2444 | #endif |
Patrick McHardy | cf6994c | 2007-07-07 22:32:34 -0700 | [diff] [blame] | 2445 | static int ctnetlink_exp_done(struct netlink_callback *cb) |
| 2446 | { |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 2447 | if (cb->args[1]) |
| 2448 | nf_ct_expect_put((struct nf_conntrack_expect *)cb->args[1]); |
Patrick McHardy | cf6994c | 2007-07-07 22:32:34 -0700 | [diff] [blame] | 2449 | return 0; |
| 2450 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2451 | |
| 2452 | static int |
| 2453 | ctnetlink_exp_dump_table(struct sk_buff *skb, struct netlink_callback *cb) |
| 2454 | { |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 2455 | struct net *net = sock_net(skb->sk); |
Patrick McHardy | cf6994c | 2007-07-07 22:32:34 -0700 | [diff] [blame] | 2456 | struct nf_conntrack_expect *exp, *last; |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 2457 | struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh); |
Pablo Neira Ayuso | 87711cb | 2006-01-05 12:19:23 -0800 | [diff] [blame] | 2458 | u_int8_t l3proto = nfmsg->nfgen_family; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2459 | |
Patrick McHardy | 7d0742d | 2008-01-31 04:38:19 -0800 | [diff] [blame] | 2460 | rcu_read_lock(); |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 2461 | last = (struct nf_conntrack_expect *)cb->args[1]; |
| 2462 | for (; cb->args[0] < nf_ct_expect_hsize; cb->args[0]++) { |
Patrick McHardy | cf6994c | 2007-07-07 22:32:34 -0700 | [diff] [blame] | 2463 | restart: |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 2464 | hlist_for_each_entry(exp, &net->ct.expect_hash[cb->args[0]], |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 2465 | hnode) { |
| 2466 | if (l3proto && exp->tuple.src.l3num != l3proto) |
Patrick McHardy | cf6994c | 2007-07-07 22:32:34 -0700 | [diff] [blame] | 2467 | continue; |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 2468 | if (cb->args[1]) { |
| 2469 | if (exp != last) |
| 2470 | continue; |
| 2471 | cb->args[1] = 0; |
| 2472 | } |
Pablo Neira Ayuso | 8b0a231 | 2009-06-02 20:03:34 +0200 | [diff] [blame] | 2473 | if (ctnetlink_exp_fill_info(skb, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2474 | NETLINK_CB(cb->skb).portid, |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 2475 | cb->nlh->nlmsg_seq, |
| 2476 | IPCTNL_MSG_EXP_NEW, |
Pablo Neira Ayuso | 8b0a231 | 2009-06-02 20:03:34 +0200 | [diff] [blame] | 2477 | exp) < 0) { |
Patrick McHardy | 7d0742d | 2008-01-31 04:38:19 -0800 | [diff] [blame] | 2478 | if (!atomic_inc_not_zero(&exp->use)) |
| 2479 | continue; |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 2480 | cb->args[1] = (unsigned long)exp; |
| 2481 | goto out; |
| 2482 | } |
Patrick McHardy | cf6994c | 2007-07-07 22:32:34 -0700 | [diff] [blame] | 2483 | } |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 2484 | if (cb->args[1]) { |
| 2485 | cb->args[1] = 0; |
| 2486 | goto restart; |
Patrick McHardy | cf6994c | 2007-07-07 22:32:34 -0700 | [diff] [blame] | 2487 | } |
| 2488 | } |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 2489 | out: |
Patrick McHardy | 7d0742d | 2008-01-31 04:38:19 -0800 | [diff] [blame] | 2490 | rcu_read_unlock(); |
Patrick McHardy | cf6994c | 2007-07-07 22:32:34 -0700 | [diff] [blame] | 2491 | if (last) |
| 2492 | nf_ct_expect_put(last); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2493 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2494 | return skb->len; |
| 2495 | } |
| 2496 | |
Pablo Neira Ayuso | e844a92 | 2013-03-17 23:21:36 +0000 | [diff] [blame] | 2497 | static int |
| 2498 | ctnetlink_exp_ct_dump_table(struct sk_buff *skb, struct netlink_callback *cb) |
| 2499 | { |
| 2500 | struct nf_conntrack_expect *exp, *last; |
| 2501 | struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh); |
| 2502 | struct nf_conn *ct = cb->data; |
| 2503 | struct nf_conn_help *help = nfct_help(ct); |
| 2504 | u_int8_t l3proto = nfmsg->nfgen_family; |
| 2505 | |
| 2506 | if (cb->args[0]) |
| 2507 | return 0; |
| 2508 | |
| 2509 | rcu_read_lock(); |
| 2510 | last = (struct nf_conntrack_expect *)cb->args[1]; |
| 2511 | restart: |
| 2512 | hlist_for_each_entry(exp, &help->expectations, lnode) { |
| 2513 | if (l3proto && exp->tuple.src.l3num != l3proto) |
| 2514 | continue; |
| 2515 | if (cb->args[1]) { |
| 2516 | if (exp != last) |
| 2517 | continue; |
| 2518 | cb->args[1] = 0; |
| 2519 | } |
| 2520 | if (ctnetlink_exp_fill_info(skb, NETLINK_CB(cb->skb).portid, |
| 2521 | cb->nlh->nlmsg_seq, |
| 2522 | IPCTNL_MSG_EXP_NEW, |
| 2523 | exp) < 0) { |
| 2524 | if (!atomic_inc_not_zero(&exp->use)) |
| 2525 | continue; |
| 2526 | cb->args[1] = (unsigned long)exp; |
| 2527 | goto out; |
| 2528 | } |
| 2529 | } |
| 2530 | if (cb->args[1]) { |
| 2531 | cb->args[1] = 0; |
| 2532 | goto restart; |
| 2533 | } |
| 2534 | cb->args[0] = 1; |
| 2535 | out: |
| 2536 | rcu_read_unlock(); |
| 2537 | if (last) |
| 2538 | nf_ct_expect_put(last); |
| 2539 | |
| 2540 | return skb->len; |
| 2541 | } |
| 2542 | |
| 2543 | static int ctnetlink_dump_exp_ct(struct sock *ctnl, struct sk_buff *skb, |
| 2544 | const struct nlmsghdr *nlh, |
| 2545 | const struct nlattr * const cda[]) |
| 2546 | { |
| 2547 | int err; |
| 2548 | struct net *net = sock_net(ctnl); |
| 2549 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
| 2550 | u_int8_t u3 = nfmsg->nfgen_family; |
| 2551 | struct nf_conntrack_tuple tuple; |
| 2552 | struct nf_conntrack_tuple_hash *h; |
| 2553 | struct nf_conn *ct; |
| 2554 | u16 zone = 0; |
| 2555 | struct netlink_dump_control c = { |
| 2556 | .dump = ctnetlink_exp_ct_dump_table, |
| 2557 | .done = ctnetlink_exp_done, |
| 2558 | }; |
| 2559 | |
| 2560 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_MASTER, u3); |
| 2561 | if (err < 0) |
| 2562 | return err; |
| 2563 | |
| 2564 | if (cda[CTA_EXPECT_ZONE]) { |
| 2565 | err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone); |
| 2566 | if (err < 0) |
| 2567 | return err; |
| 2568 | } |
| 2569 | |
| 2570 | h = nf_conntrack_find_get(net, zone, &tuple); |
| 2571 | if (!h) |
| 2572 | return -ENOENT; |
| 2573 | |
| 2574 | ct = nf_ct_tuplehash_to_ctrack(h); |
| 2575 | c.data = ct; |
| 2576 | |
| 2577 | err = netlink_dump_start(ctnl, skb, nlh, &c); |
| 2578 | nf_ct_put(ct); |
| 2579 | |
| 2580 | return err; |
| 2581 | } |
| 2582 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2583 | static int |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 2584 | ctnetlink_get_expect(struct sock *ctnl, struct sk_buff *skb, |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 2585 | const struct nlmsghdr *nlh, |
| 2586 | const struct nlattr * const cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2587 | { |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 2588 | struct net *net = sock_net(ctnl); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2589 | struct nf_conntrack_tuple tuple; |
| 2590 | struct nf_conntrack_expect *exp; |
| 2591 | struct sk_buff *skb2; |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 2592 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2593 | u_int8_t u3 = nfmsg->nfgen_family; |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 2594 | u16 zone; |
| 2595 | int err; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2596 | |
David S. Miller | b8f3ab4 | 2011-01-18 12:40:38 -0800 | [diff] [blame] | 2597 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
Pablo Neira Ayuso | e844a92 | 2013-03-17 23:21:36 +0000 | [diff] [blame] | 2598 | if (cda[CTA_EXPECT_MASTER]) |
| 2599 | return ctnetlink_dump_exp_ct(ctnl, skb, nlh, cda); |
| 2600 | else { |
| 2601 | struct netlink_dump_control c = { |
| 2602 | .dump = ctnetlink_exp_dump_table, |
| 2603 | .done = ctnetlink_exp_done, |
| 2604 | }; |
| 2605 | return netlink_dump_start(ctnl, skb, nlh, &c); |
| 2606 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2607 | } |
| 2608 | |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 2609 | err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone); |
| 2610 | if (err < 0) |
| 2611 | return err; |
| 2612 | |
Pablo Neira Ayuso | 35dba1d | 2011-12-14 12:45:22 +0100 | [diff] [blame] | 2613 | if (cda[CTA_EXPECT_TUPLE]) |
| 2614 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); |
| 2615 | else if (cda[CTA_EXPECT_MASTER]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2616 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_MASTER, u3); |
| 2617 | else |
| 2618 | return -EINVAL; |
| 2619 | |
| 2620 | if (err < 0) |
| 2621 | return err; |
| 2622 | |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 2623 | exp = nf_ct_expect_find_get(net, zone, &tuple); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2624 | if (!exp) |
| 2625 | return -ENOENT; |
| 2626 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2627 | if (cda[CTA_EXPECT_ID]) { |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 2628 | __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]); |
Patrick McHardy | 3583240 | 2007-09-28 14:41:50 -0700 | [diff] [blame] | 2629 | if (ntohl(id) != (u32)(unsigned long)exp) { |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 2630 | nf_ct_expect_put(exp); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2631 | return -ENOENT; |
| 2632 | } |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 2633 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2634 | |
| 2635 | err = -ENOMEM; |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 2636 | skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
Pablo Neira Ayuso | 81378f7 | 2011-12-24 19:03:46 +0100 | [diff] [blame] | 2637 | if (skb2 == NULL) { |
| 2638 | nf_ct_expect_put(exp); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2639 | goto out; |
Pablo Neira Ayuso | 81378f7 | 2011-12-24 19:03:46 +0100 | [diff] [blame] | 2640 | } |
Thomas Graf | 4e9b826 | 2006-11-27 09:25:58 -0800 | [diff] [blame] | 2641 | |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 2642 | rcu_read_lock(); |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2643 | err = ctnetlink_exp_fill_info(skb2, NETLINK_CB(skb).portid, |
Pablo Neira Ayuso | 8b0a231 | 2009-06-02 20:03:34 +0200 | [diff] [blame] | 2644 | nlh->nlmsg_seq, IPCTNL_MSG_EXP_NEW, exp); |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 2645 | rcu_read_unlock(); |
Pablo Neira Ayuso | 81378f7 | 2011-12-24 19:03:46 +0100 | [diff] [blame] | 2646 | nf_ct_expect_put(exp); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2647 | if (err <= 0) |
| 2648 | goto free; |
| 2649 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2650 | err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).portid, MSG_DONTWAIT); |
Pablo Neira Ayuso | 81378f7 | 2011-12-24 19:03:46 +0100 | [diff] [blame] | 2651 | if (err < 0) |
| 2652 | goto out; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2653 | |
Pablo Neira Ayuso | 81378f7 | 2011-12-24 19:03:46 +0100 | [diff] [blame] | 2654 | return 0; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2655 | |
| 2656 | free: |
| 2657 | kfree_skb(skb2); |
| 2658 | out: |
Pablo Neira Ayuso | 81378f7 | 2011-12-24 19:03:46 +0100 | [diff] [blame] | 2659 | /* this avoids a loop in nfnetlink. */ |
| 2660 | return err == -EAGAIN ? -ENOBUFS : err; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2661 | } |
| 2662 | |
| 2663 | static int |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 2664 | ctnetlink_del_expect(struct sock *ctnl, struct sk_buff *skb, |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 2665 | const struct nlmsghdr *nlh, |
| 2666 | const struct nlattr * const cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2667 | { |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 2668 | struct net *net = sock_net(ctnl); |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 2669 | struct nf_conntrack_expect *exp; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2670 | struct nf_conntrack_tuple tuple; |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 2671 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 2672 | struct hlist_node *next; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2673 | u_int8_t u3 = nfmsg->nfgen_family; |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 2674 | unsigned int i; |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 2675 | u16 zone; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2676 | int err; |
| 2677 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2678 | if (cda[CTA_EXPECT_TUPLE]) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2679 | /* delete a single expect by tuple */ |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 2680 | err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone); |
| 2681 | if (err < 0) |
| 2682 | return err; |
| 2683 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2684 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); |
| 2685 | if (err < 0) |
| 2686 | return err; |
| 2687 | |
| 2688 | /* bump usage count to 2 */ |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 2689 | exp = nf_ct_expect_find_get(net, zone, &tuple); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2690 | if (!exp) |
| 2691 | return -ENOENT; |
| 2692 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2693 | if (cda[CTA_EXPECT_ID]) { |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 2694 | __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]); |
Patrick McHardy | 3583240 | 2007-09-28 14:41:50 -0700 | [diff] [blame] | 2695 | if (ntohl(id) != (u32)(unsigned long)exp) { |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 2696 | nf_ct_expect_put(exp); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2697 | return -ENOENT; |
| 2698 | } |
| 2699 | } |
| 2700 | |
| 2701 | /* after list removal, usage count == 1 */ |
Pablo Neira Ayuso | ebbf41d | 2010-10-19 10:19:06 +0200 | [diff] [blame] | 2702 | spin_lock_bh(&nf_conntrack_lock); |
| 2703 | if (del_timer(&exp->timeout)) { |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2704 | nf_ct_unlink_expect_report(exp, NETLINK_CB(skb).portid, |
Pablo Neira Ayuso | ebbf41d | 2010-10-19 10:19:06 +0200 | [diff] [blame] | 2705 | nlmsg_report(nlh)); |
| 2706 | nf_ct_expect_put(exp); |
| 2707 | } |
| 2708 | spin_unlock_bh(&nf_conntrack_lock); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 2709 | /* have to put what we 'get' above. |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2710 | * after this line usage count == 0 */ |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 2711 | nf_ct_expect_put(exp); |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2712 | } else if (cda[CTA_EXPECT_HELP_NAME]) { |
| 2713 | char *name = nla_data(cda[CTA_EXPECT_HELP_NAME]); |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 2714 | struct nf_conn_help *m_help; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2715 | |
| 2716 | /* delete all expectations for this helper */ |
Patrick McHardy | f8ba1af | 2008-01-31 04:38:58 -0800 | [diff] [blame] | 2717 | spin_lock_bh(&nf_conntrack_lock); |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 2718 | for (i = 0; i < nf_ct_expect_hsize; i++) { |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 2719 | hlist_for_each_entry_safe(exp, next, |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 2720 | &net->ct.expect_hash[i], |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 2721 | hnode) { |
| 2722 | m_help = nfct_help(exp->master); |
Patrick McHardy | 794e687 | 2010-02-03 13:41:29 +0100 | [diff] [blame] | 2723 | if (!strcmp(m_help->helper->name, name) && |
| 2724 | del_timer(&exp->timeout)) { |
Pablo Neira Ayuso | ebbf41d | 2010-10-19 10:19:06 +0200 | [diff] [blame] | 2725 | nf_ct_unlink_expect_report(exp, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2726 | NETLINK_CB(skb).portid, |
Pablo Neira Ayuso | ebbf41d | 2010-10-19 10:19:06 +0200 | [diff] [blame] | 2727 | nlmsg_report(nlh)); |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 2728 | nf_ct_expect_put(exp); |
| 2729 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2730 | } |
| 2731 | } |
Patrick McHardy | f8ba1af | 2008-01-31 04:38:58 -0800 | [diff] [blame] | 2732 | spin_unlock_bh(&nf_conntrack_lock); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2733 | } else { |
| 2734 | /* This basically means we have to flush everything*/ |
Patrick McHardy | f8ba1af | 2008-01-31 04:38:58 -0800 | [diff] [blame] | 2735 | spin_lock_bh(&nf_conntrack_lock); |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 2736 | for (i = 0; i < nf_ct_expect_hsize; i++) { |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 2737 | hlist_for_each_entry_safe(exp, next, |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 2738 | &net->ct.expect_hash[i], |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 2739 | hnode) { |
| 2740 | if (del_timer(&exp->timeout)) { |
Pablo Neira Ayuso | ebbf41d | 2010-10-19 10:19:06 +0200 | [diff] [blame] | 2741 | nf_ct_unlink_expect_report(exp, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2742 | NETLINK_CB(skb).portid, |
Pablo Neira Ayuso | ebbf41d | 2010-10-19 10:19:06 +0200 | [diff] [blame] | 2743 | nlmsg_report(nlh)); |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 2744 | nf_ct_expect_put(exp); |
| 2745 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2746 | } |
| 2747 | } |
Patrick McHardy | f8ba1af | 2008-01-31 04:38:58 -0800 | [diff] [blame] | 2748 | spin_unlock_bh(&nf_conntrack_lock); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2749 | } |
| 2750 | |
| 2751 | return 0; |
| 2752 | } |
| 2753 | static int |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 2754 | ctnetlink_change_expect(struct nf_conntrack_expect *x, |
| 2755 | const struct nlattr * const cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2756 | { |
Kelvie Wong | 9768e1a | 2012-05-02 14:39:24 +0000 | [diff] [blame] | 2757 | if (cda[CTA_EXPECT_TIMEOUT]) { |
| 2758 | if (!del_timer(&x->timeout)) |
| 2759 | return -ETIME; |
| 2760 | |
| 2761 | x->timeout.expires = jiffies + |
| 2762 | ntohl(nla_get_be32(cda[CTA_EXPECT_TIMEOUT])) * HZ; |
| 2763 | add_timer(&x->timeout); |
| 2764 | } |
| 2765 | return 0; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2766 | } |
| 2767 | |
Pablo Neira Ayuso | 076a0ca | 2012-02-05 03:41:52 +0100 | [diff] [blame] | 2768 | static const struct nla_policy exp_nat_nla_policy[CTA_EXPECT_NAT_MAX+1] = { |
| 2769 | [CTA_EXPECT_NAT_DIR] = { .type = NLA_U32 }, |
| 2770 | [CTA_EXPECT_NAT_TUPLE] = { .type = NLA_NESTED }, |
| 2771 | }; |
| 2772 | |
| 2773 | static int |
| 2774 | ctnetlink_parse_expect_nat(const struct nlattr *attr, |
| 2775 | struct nf_conntrack_expect *exp, |
| 2776 | u_int8_t u3) |
| 2777 | { |
| 2778 | #ifdef CONFIG_NF_NAT_NEEDED |
| 2779 | struct nlattr *tb[CTA_EXPECT_NAT_MAX+1]; |
| 2780 | struct nf_conntrack_tuple nat_tuple = {}; |
| 2781 | int err; |
| 2782 | |
Daniel Borkmann | 130ffbc | 2013-06-12 17:54:51 +0200 | [diff] [blame] | 2783 | err = nla_parse_nested(tb, CTA_EXPECT_NAT_MAX, attr, exp_nat_nla_policy); |
| 2784 | if (err < 0) |
| 2785 | return err; |
Pablo Neira Ayuso | 076a0ca | 2012-02-05 03:41:52 +0100 | [diff] [blame] | 2786 | |
| 2787 | if (!tb[CTA_EXPECT_NAT_DIR] || !tb[CTA_EXPECT_NAT_TUPLE]) |
| 2788 | return -EINVAL; |
| 2789 | |
| 2790 | err = ctnetlink_parse_tuple((const struct nlattr * const *)tb, |
| 2791 | &nat_tuple, CTA_EXPECT_NAT_TUPLE, u3); |
| 2792 | if (err < 0) |
| 2793 | return err; |
| 2794 | |
Patrick McHardy | c7232c9 | 2012-08-26 19:14:06 +0200 | [diff] [blame] | 2795 | exp->saved_addr = nat_tuple.src.u3; |
Pablo Neira Ayuso | 076a0ca | 2012-02-05 03:41:52 +0100 | [diff] [blame] | 2796 | exp->saved_proto = nat_tuple.src.u; |
| 2797 | exp->dir = ntohl(nla_get_be32(tb[CTA_EXPECT_NAT_DIR])); |
| 2798 | |
| 2799 | return 0; |
| 2800 | #else |
| 2801 | return -EOPNOTSUPP; |
| 2802 | #endif |
| 2803 | } |
| 2804 | |
Pablo Neira Ayuso | 0ef71ee | 2013-08-07 19:12:34 +0200 | [diff] [blame] | 2805 | static struct nf_conntrack_expect * |
| 2806 | ctnetlink_alloc_expect(const struct nlattr * const cda[], struct nf_conn *ct, |
| 2807 | struct nf_conntrack_helper *helper, |
| 2808 | struct nf_conntrack_tuple *tuple, |
| 2809 | struct nf_conntrack_tuple *mask) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2810 | { |
Pablo Neira Ayuso | b8c5e52 | 2012-02-05 03:21:12 +0100 | [diff] [blame] | 2811 | u_int32_t class = 0; |
Pablo Neira Ayuso | 0ef71ee | 2013-08-07 19:12:34 +0200 | [diff] [blame] | 2812 | struct nf_conntrack_expect *exp; |
| 2813 | struct nf_conn_help *help; |
| 2814 | int err; |
Pablo Neira Ayuso | 660fdb2 | 2012-02-05 02:34:16 +0100 | [diff] [blame] | 2815 | |
Pablo Neira Ayuso | b8c5e52 | 2012-02-05 03:21:12 +0100 | [diff] [blame] | 2816 | if (cda[CTA_EXPECT_CLASS] && helper) { |
| 2817 | class = ntohl(nla_get_be32(cda[CTA_EXPECT_CLASS])); |
Pablo Neira Ayuso | 0ef71ee | 2013-08-07 19:12:34 +0200 | [diff] [blame] | 2818 | if (class > helper->expect_class_max) |
| 2819 | return ERR_PTR(-EINVAL); |
Pablo Neira Ayuso | b8c5e52 | 2012-02-05 03:21:12 +0100 | [diff] [blame] | 2820 | } |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 2821 | exp = nf_ct_expect_alloc(ct); |
Pablo Neira Ayuso | 0ef71ee | 2013-08-07 19:12:34 +0200 | [diff] [blame] | 2822 | if (!exp) |
| 2823 | return ERR_PTR(-ENOMEM); |
| 2824 | |
Pablo Neira Ayuso | bc01befd | 2010-09-28 21:06:34 +0200 | [diff] [blame] | 2825 | help = nfct_help(ct); |
| 2826 | if (!help) { |
| 2827 | if (!cda[CTA_EXPECT_TIMEOUT]) { |
| 2828 | err = -EINVAL; |
Jesper Juhl | 1310b955 | 2012-12-26 11:49:40 +0000 | [diff] [blame] | 2829 | goto err_out; |
Pablo Neira Ayuso | bc01befd | 2010-09-28 21:06:34 +0200 | [diff] [blame] | 2830 | } |
| 2831 | exp->timeout.expires = |
| 2832 | jiffies + ntohl(nla_get_be32(cda[CTA_EXPECT_TIMEOUT])) * HZ; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 2833 | |
Pablo Neira Ayuso | bc01befd | 2010-09-28 21:06:34 +0200 | [diff] [blame] | 2834 | exp->flags = NF_CT_EXPECT_USERSPACE; |
| 2835 | if (cda[CTA_EXPECT_FLAGS]) { |
| 2836 | exp->flags |= |
| 2837 | ntohl(nla_get_be32(cda[CTA_EXPECT_FLAGS])); |
| 2838 | } |
| 2839 | } else { |
| 2840 | if (cda[CTA_EXPECT_FLAGS]) { |
| 2841 | exp->flags = ntohl(nla_get_be32(cda[CTA_EXPECT_FLAGS])); |
| 2842 | exp->flags &= ~NF_CT_EXPECT_USERSPACE; |
| 2843 | } else |
| 2844 | exp->flags = 0; |
| 2845 | } |
Pablo Neira Ayuso | 544d5c7 | 2012-02-05 03:44:51 +0100 | [diff] [blame] | 2846 | if (cda[CTA_EXPECT_FN]) { |
| 2847 | const char *name = nla_data(cda[CTA_EXPECT_FN]); |
| 2848 | struct nf_ct_helper_expectfn *expfn; |
| 2849 | |
| 2850 | expfn = nf_ct_helper_expectfn_find_by_name(name); |
| 2851 | if (expfn == NULL) { |
| 2852 | err = -EINVAL; |
| 2853 | goto err_out; |
| 2854 | } |
| 2855 | exp->expectfn = expfn->expectfn; |
| 2856 | } else |
| 2857 | exp->expectfn = NULL; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2858 | |
Pablo Neira Ayuso | b8c5e52 | 2012-02-05 03:21:12 +0100 | [diff] [blame] | 2859 | exp->class = class; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2860 | exp->master = ct; |
Pablo Neira Ayuso | 660fdb2 | 2012-02-05 02:34:16 +0100 | [diff] [blame] | 2861 | exp->helper = helper; |
Pablo Neira Ayuso | 0ef71ee | 2013-08-07 19:12:34 +0200 | [diff] [blame] | 2862 | exp->tuple = *tuple; |
| 2863 | exp->mask.src.u3 = mask->src.u3; |
| 2864 | exp->mask.src.u.all = mask->src.u.all; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2865 | |
Pablo Neira Ayuso | 076a0ca | 2012-02-05 03:41:52 +0100 | [diff] [blame] | 2866 | if (cda[CTA_EXPECT_NAT]) { |
| 2867 | err = ctnetlink_parse_expect_nat(cda[CTA_EXPECT_NAT], |
Pablo Neira Ayuso | 0ef71ee | 2013-08-07 19:12:34 +0200 | [diff] [blame] | 2868 | exp, nf_ct_l3num(ct)); |
Pablo Neira Ayuso | 076a0ca | 2012-02-05 03:41:52 +0100 | [diff] [blame] | 2869 | if (err < 0) |
| 2870 | goto err_out; |
| 2871 | } |
Pablo Neira Ayuso | 0ef71ee | 2013-08-07 19:12:34 +0200 | [diff] [blame] | 2872 | return exp; |
Pablo Neira Ayuso | 076a0ca | 2012-02-05 03:41:52 +0100 | [diff] [blame] | 2873 | err_out: |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 2874 | nf_ct_expect_put(exp); |
Pablo Neira Ayuso | 0ef71ee | 2013-08-07 19:12:34 +0200 | [diff] [blame] | 2875 | return ERR_PTR(err); |
| 2876 | } |
| 2877 | |
| 2878 | static int |
| 2879 | ctnetlink_create_expect(struct net *net, u16 zone, |
| 2880 | const struct nlattr * const cda[], |
| 2881 | u_int8_t u3, u32 portid, int report) |
| 2882 | { |
| 2883 | struct nf_conntrack_tuple tuple, mask, master_tuple; |
| 2884 | struct nf_conntrack_tuple_hash *h = NULL; |
| 2885 | struct nf_conntrack_helper *helper = NULL; |
| 2886 | struct nf_conntrack_expect *exp; |
| 2887 | struct nf_conn *ct; |
| 2888 | int err; |
| 2889 | |
| 2890 | /* caller guarantees that those three CTA_EXPECT_* exist */ |
| 2891 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); |
| 2892 | if (err < 0) |
| 2893 | return err; |
| 2894 | err = ctnetlink_parse_tuple(cda, &mask, CTA_EXPECT_MASK, u3); |
| 2895 | if (err < 0) |
| 2896 | return err; |
| 2897 | err = ctnetlink_parse_tuple(cda, &master_tuple, CTA_EXPECT_MASTER, u3); |
| 2898 | if (err < 0) |
| 2899 | return err; |
| 2900 | |
| 2901 | /* Look for master conntrack of this expectation */ |
| 2902 | h = nf_conntrack_find_get(net, zone, &master_tuple); |
| 2903 | if (!h) |
| 2904 | return -ENOENT; |
| 2905 | ct = nf_ct_tuplehash_to_ctrack(h); |
| 2906 | |
| 2907 | if (cda[CTA_EXPECT_HELP_NAME]) { |
| 2908 | const char *helpname = nla_data(cda[CTA_EXPECT_HELP_NAME]); |
| 2909 | |
| 2910 | helper = __nf_conntrack_helper_find(helpname, u3, |
| 2911 | nf_ct_protonum(ct)); |
| 2912 | if (helper == NULL) { |
| 2913 | #ifdef CONFIG_MODULES |
| 2914 | if (request_module("nfct-helper-%s", helpname) < 0) { |
| 2915 | err = -EOPNOTSUPP; |
| 2916 | goto err_ct; |
| 2917 | } |
| 2918 | helper = __nf_conntrack_helper_find(helpname, u3, |
| 2919 | nf_ct_protonum(ct)); |
| 2920 | if (helper) { |
| 2921 | err = -EAGAIN; |
| 2922 | goto err_ct; |
| 2923 | } |
| 2924 | #endif |
| 2925 | err = -EOPNOTSUPP; |
| 2926 | goto err_ct; |
| 2927 | } |
| 2928 | } |
| 2929 | |
| 2930 | exp = ctnetlink_alloc_expect(cda, ct, helper, &tuple, &mask); |
| 2931 | if (IS_ERR(exp)) { |
| 2932 | err = PTR_ERR(exp); |
| 2933 | goto err_ct; |
| 2934 | } |
| 2935 | |
| 2936 | err = nf_ct_expect_related_report(exp, portid, report); |
| 2937 | if (err < 0) |
| 2938 | goto err_exp; |
| 2939 | |
| 2940 | return 0; |
| 2941 | err_exp: |
| 2942 | nf_ct_expect_put(exp); |
| 2943 | err_ct: |
| 2944 | nf_ct_put(ct); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2945 | return err; |
| 2946 | } |
| 2947 | |
| 2948 | static int |
| 2949 | ctnetlink_new_expect(struct sock *ctnl, struct sk_buff *skb, |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 2950 | const struct nlmsghdr *nlh, |
| 2951 | const struct nlattr * const cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2952 | { |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 2953 | struct net *net = sock_net(ctnl); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2954 | struct nf_conntrack_tuple tuple; |
| 2955 | struct nf_conntrack_expect *exp; |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 2956 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2957 | u_int8_t u3 = nfmsg->nfgen_family; |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 2958 | u16 zone; |
| 2959 | int err; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2960 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2961 | if (!cda[CTA_EXPECT_TUPLE] |
| 2962 | || !cda[CTA_EXPECT_MASK] |
| 2963 | || !cda[CTA_EXPECT_MASTER]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2964 | return -EINVAL; |
| 2965 | |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 2966 | err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone); |
| 2967 | if (err < 0) |
| 2968 | return err; |
| 2969 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2970 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); |
| 2971 | if (err < 0) |
| 2972 | return err; |
| 2973 | |
Patrick McHardy | f8ba1af | 2008-01-31 04:38:58 -0800 | [diff] [blame] | 2974 | spin_lock_bh(&nf_conntrack_lock); |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 2975 | exp = __nf_ct_expect_find(net, zone, &tuple); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2976 | |
| 2977 | if (!exp) { |
Patrick McHardy | f8ba1af | 2008-01-31 04:38:58 -0800 | [diff] [blame] | 2978 | spin_unlock_bh(&nf_conntrack_lock); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2979 | err = -ENOENT; |
Pablo Neira Ayuso | 19abb7b | 2008-11-18 11:56:20 +0100 | [diff] [blame] | 2980 | if (nlh->nlmsg_flags & NLM_F_CREATE) { |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 2981 | err = ctnetlink_create_expect(net, zone, cda, |
Pablo Neira Ayuso | 19abb7b | 2008-11-18 11:56:20 +0100 | [diff] [blame] | 2982 | u3, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2983 | NETLINK_CB(skb).portid, |
Pablo Neira Ayuso | 19abb7b | 2008-11-18 11:56:20 +0100 | [diff] [blame] | 2984 | nlmsg_report(nlh)); |
| 2985 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2986 | return err; |
| 2987 | } |
| 2988 | |
| 2989 | err = -EEXIST; |
| 2990 | if (!(nlh->nlmsg_flags & NLM_F_EXCL)) |
| 2991 | err = ctnetlink_change_expect(exp, cda); |
Patrick McHardy | f8ba1af | 2008-01-31 04:38:58 -0800 | [diff] [blame] | 2992 | spin_unlock_bh(&nf_conntrack_lock); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2993 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2994 | return err; |
| 2995 | } |
| 2996 | |
Pablo Neira Ayuso | 392025f | 2012-06-26 20:27:09 +0200 | [diff] [blame] | 2997 | static int |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2998 | ctnetlink_exp_stat_fill_info(struct sk_buff *skb, u32 portid, u32 seq, int cpu, |
Pablo Neira Ayuso | 392025f | 2012-06-26 20:27:09 +0200 | [diff] [blame] | 2999 | const struct ip_conntrack_stat *st) |
| 3000 | { |
| 3001 | struct nlmsghdr *nlh; |
| 3002 | struct nfgenmsg *nfmsg; |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 3003 | unsigned int flags = portid ? NLM_F_MULTI : 0, event; |
Pablo Neira Ayuso | 392025f | 2012-06-26 20:27:09 +0200 | [diff] [blame] | 3004 | |
| 3005 | event = (NFNL_SUBSYS_CTNETLINK << 8 | IPCTNL_MSG_EXP_GET_STATS_CPU); |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 3006 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags); |
Pablo Neira Ayuso | 392025f | 2012-06-26 20:27:09 +0200 | [diff] [blame] | 3007 | if (nlh == NULL) |
| 3008 | goto nlmsg_failure; |
| 3009 | |
| 3010 | nfmsg = nlmsg_data(nlh); |
| 3011 | nfmsg->nfgen_family = AF_UNSPEC; |
| 3012 | nfmsg->version = NFNETLINK_V0; |
| 3013 | nfmsg->res_id = htons(cpu); |
| 3014 | |
| 3015 | if (nla_put_be32(skb, CTA_STATS_EXP_NEW, htonl(st->expect_new)) || |
| 3016 | nla_put_be32(skb, CTA_STATS_EXP_CREATE, htonl(st->expect_create)) || |
| 3017 | nla_put_be32(skb, CTA_STATS_EXP_DELETE, htonl(st->expect_delete))) |
| 3018 | goto nla_put_failure; |
| 3019 | |
| 3020 | nlmsg_end(skb, nlh); |
| 3021 | return skb->len; |
| 3022 | |
| 3023 | nla_put_failure: |
| 3024 | nlmsg_failure: |
| 3025 | nlmsg_cancel(skb, nlh); |
| 3026 | return -1; |
| 3027 | } |
| 3028 | |
| 3029 | static int |
| 3030 | ctnetlink_exp_stat_cpu_dump(struct sk_buff *skb, struct netlink_callback *cb) |
| 3031 | { |
| 3032 | int cpu; |
| 3033 | struct net *net = sock_net(skb->sk); |
| 3034 | |
| 3035 | if (cb->args[0] == nr_cpu_ids) |
| 3036 | return 0; |
| 3037 | |
| 3038 | for (cpu = cb->args[0]; cpu < nr_cpu_ids; cpu++) { |
| 3039 | const struct ip_conntrack_stat *st; |
| 3040 | |
| 3041 | if (!cpu_possible(cpu)) |
| 3042 | continue; |
| 3043 | |
| 3044 | st = per_cpu_ptr(net->ct.stat, cpu); |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 3045 | if (ctnetlink_exp_stat_fill_info(skb, NETLINK_CB(cb->skb).portid, |
Pablo Neira Ayuso | 392025f | 2012-06-26 20:27:09 +0200 | [diff] [blame] | 3046 | cb->nlh->nlmsg_seq, |
| 3047 | cpu, st) < 0) |
| 3048 | break; |
| 3049 | } |
| 3050 | cb->args[0] = cpu; |
| 3051 | |
| 3052 | return skb->len; |
| 3053 | } |
| 3054 | |
| 3055 | static int |
| 3056 | ctnetlink_stat_exp_cpu(struct sock *ctnl, struct sk_buff *skb, |
| 3057 | const struct nlmsghdr *nlh, |
| 3058 | const struct nlattr * const cda[]) |
| 3059 | { |
| 3060 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
| 3061 | struct netlink_dump_control c = { |
| 3062 | .dump = ctnetlink_exp_stat_cpu_dump, |
| 3063 | }; |
| 3064 | return netlink_dump_start(ctnl, skb, nlh, &c); |
| 3065 | } |
| 3066 | |
| 3067 | return 0; |
| 3068 | } |
| 3069 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3070 | #ifdef CONFIG_NF_CONNTRACK_EVENTS |
Pablo Neira Ayuso | e34d5c1 | 2009-06-03 10:32:06 +0200 | [diff] [blame] | 3071 | static struct nf_ct_event_notifier ctnl_notifier = { |
| 3072 | .fcn = ctnetlink_conntrack_event, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3073 | }; |
| 3074 | |
Pablo Neira Ayuso | e34d5c1 | 2009-06-03 10:32:06 +0200 | [diff] [blame] | 3075 | static struct nf_exp_event_notifier ctnl_notifier_exp = { |
| 3076 | .fcn = ctnetlink_expect_event, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3077 | }; |
| 3078 | #endif |
| 3079 | |
Patrick McHardy | 7c8d4cb | 2007-09-28 14:15:45 -0700 | [diff] [blame] | 3080 | static const struct nfnl_callback ctnl_cb[IPCTNL_MSG_MAX] = { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3081 | [IPCTNL_MSG_CT_NEW] = { .call = ctnetlink_new_conntrack, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 3082 | .attr_count = CTA_MAX, |
| 3083 | .policy = ct_nla_policy }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3084 | [IPCTNL_MSG_CT_GET] = { .call = ctnetlink_get_conntrack, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 3085 | .attr_count = CTA_MAX, |
| 3086 | .policy = ct_nla_policy }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3087 | [IPCTNL_MSG_CT_DELETE] = { .call = ctnetlink_del_conntrack, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 3088 | .attr_count = CTA_MAX, |
| 3089 | .policy = ct_nla_policy }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3090 | [IPCTNL_MSG_CT_GET_CTRZERO] = { .call = ctnetlink_get_conntrack, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 3091 | .attr_count = CTA_MAX, |
| 3092 | .policy = ct_nla_policy }, |
Pablo Neira Ayuso | 392025f | 2012-06-26 20:27:09 +0200 | [diff] [blame] | 3093 | [IPCTNL_MSG_CT_GET_STATS_CPU] = { .call = ctnetlink_stat_ct_cpu }, |
| 3094 | [IPCTNL_MSG_CT_GET_STATS] = { .call = ctnetlink_stat_ct }, |
Pablo Neira Ayuso | d871bef | 2012-11-27 14:49:42 +0100 | [diff] [blame] | 3095 | [IPCTNL_MSG_CT_GET_DYING] = { .call = ctnetlink_get_ct_dying }, |
| 3096 | [IPCTNL_MSG_CT_GET_UNCONFIRMED] = { .call = ctnetlink_get_ct_unconfirmed }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3097 | }; |
| 3098 | |
Patrick McHardy | 7c8d4cb | 2007-09-28 14:15:45 -0700 | [diff] [blame] | 3099 | 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] | 3100 | [IPCTNL_MSG_EXP_GET] = { .call = ctnetlink_get_expect, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 3101 | .attr_count = CTA_EXPECT_MAX, |
| 3102 | .policy = exp_nla_policy }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3103 | [IPCTNL_MSG_EXP_NEW] = { .call = ctnetlink_new_expect, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 3104 | .attr_count = CTA_EXPECT_MAX, |
| 3105 | .policy = exp_nla_policy }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3106 | [IPCTNL_MSG_EXP_DELETE] = { .call = ctnetlink_del_expect, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 3107 | .attr_count = CTA_EXPECT_MAX, |
| 3108 | .policy = exp_nla_policy }, |
Pablo Neira Ayuso | 392025f | 2012-06-26 20:27:09 +0200 | [diff] [blame] | 3109 | [IPCTNL_MSG_EXP_GET_STATS_CPU] = { .call = ctnetlink_stat_exp_cpu }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3110 | }; |
| 3111 | |
Patrick McHardy | 7c8d4cb | 2007-09-28 14:15:45 -0700 | [diff] [blame] | 3112 | static const struct nfnetlink_subsystem ctnl_subsys = { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3113 | .name = "conntrack", |
| 3114 | .subsys_id = NFNL_SUBSYS_CTNETLINK, |
| 3115 | .cb_count = IPCTNL_MSG_MAX, |
| 3116 | .cb = ctnl_cb, |
| 3117 | }; |
| 3118 | |
Patrick McHardy | 7c8d4cb | 2007-09-28 14:15:45 -0700 | [diff] [blame] | 3119 | static const struct nfnetlink_subsystem ctnl_exp_subsys = { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3120 | .name = "conntrack_expect", |
| 3121 | .subsys_id = NFNL_SUBSYS_CTNETLINK_EXP, |
| 3122 | .cb_count = IPCTNL_MSG_EXP_MAX, |
| 3123 | .cb = ctnl_exp_cb, |
| 3124 | }; |
| 3125 | |
Patrick McHardy | d2483dd | 2006-12-02 22:06:05 -0800 | [diff] [blame] | 3126 | MODULE_ALIAS("ip_conntrack_netlink"); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3127 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK); |
Pablo Neira Ayuso | 34f9a2e | 2006-02-04 02:11:41 -0800 | [diff] [blame] | 3128 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK_EXP); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3129 | |
Pablo Neira Ayuso | 70e9942 | 2011-11-22 00:16:51 +0100 | [diff] [blame] | 3130 | static int __net_init ctnetlink_net_init(struct net *net) |
| 3131 | { |
| 3132 | #ifdef CONFIG_NF_CONNTRACK_EVENTS |
| 3133 | int ret; |
| 3134 | |
| 3135 | ret = nf_conntrack_register_notifier(net, &ctnl_notifier); |
| 3136 | if (ret < 0) { |
| 3137 | pr_err("ctnetlink_init: cannot register notifier.\n"); |
| 3138 | goto err_out; |
| 3139 | } |
| 3140 | |
| 3141 | ret = nf_ct_expect_register_notifier(net, &ctnl_notifier_exp); |
| 3142 | if (ret < 0) { |
| 3143 | pr_err("ctnetlink_init: cannot expect register notifier.\n"); |
| 3144 | goto err_unreg_notifier; |
| 3145 | } |
| 3146 | #endif |
| 3147 | return 0; |
| 3148 | |
| 3149 | #ifdef CONFIG_NF_CONNTRACK_EVENTS |
| 3150 | err_unreg_notifier: |
| 3151 | nf_conntrack_unregister_notifier(net, &ctnl_notifier); |
| 3152 | err_out: |
| 3153 | return ret; |
| 3154 | #endif |
| 3155 | } |
| 3156 | |
| 3157 | static void ctnetlink_net_exit(struct net *net) |
| 3158 | { |
| 3159 | #ifdef CONFIG_NF_CONNTRACK_EVENTS |
| 3160 | nf_ct_expect_unregister_notifier(net, &ctnl_notifier_exp); |
| 3161 | nf_conntrack_unregister_notifier(net, &ctnl_notifier); |
| 3162 | #endif |
| 3163 | } |
| 3164 | |
| 3165 | static void __net_exit ctnetlink_net_exit_batch(struct list_head *net_exit_list) |
| 3166 | { |
| 3167 | struct net *net; |
| 3168 | |
| 3169 | list_for_each_entry(net, net_exit_list, exit_list) |
| 3170 | ctnetlink_net_exit(net); |
| 3171 | } |
| 3172 | |
| 3173 | static struct pernet_operations ctnetlink_net_ops = { |
| 3174 | .init = ctnetlink_net_init, |
| 3175 | .exit_batch = ctnetlink_net_exit_batch, |
| 3176 | }; |
| 3177 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3178 | static int __init ctnetlink_init(void) |
| 3179 | { |
| 3180 | int ret; |
| 3181 | |
Stephen Hemminger | 654d0fb | 2010-05-13 15:02:08 +0200 | [diff] [blame] | 3182 | pr_info("ctnetlink v%s: registering with nfnetlink.\n", version); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3183 | ret = nfnetlink_subsys_register(&ctnl_subsys); |
| 3184 | if (ret < 0) { |
Stephen Hemminger | 654d0fb | 2010-05-13 15:02:08 +0200 | [diff] [blame] | 3185 | pr_err("ctnetlink_init: cannot register with nfnetlink.\n"); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3186 | goto err_out; |
| 3187 | } |
| 3188 | |
| 3189 | ret = nfnetlink_subsys_register(&ctnl_exp_subsys); |
| 3190 | if (ret < 0) { |
Stephen Hemminger | 654d0fb | 2010-05-13 15:02:08 +0200 | [diff] [blame] | 3191 | pr_err("ctnetlink_init: cannot register exp with nfnetlink.\n"); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3192 | goto err_unreg_subsys; |
| 3193 | } |
| 3194 | |
Julia Lawall | ef6acf6 | 2012-08-29 06:49:16 +0000 | [diff] [blame] | 3195 | ret = register_pernet_subsys(&ctnetlink_net_ops); |
| 3196 | if (ret < 0) { |
Pablo Neira Ayuso | 70e9942 | 2011-11-22 00:16:51 +0100 | [diff] [blame] | 3197 | pr_err("ctnetlink_init: cannot register pernet operations\n"); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3198 | goto err_unreg_exp_subsys; |
| 3199 | } |
Pablo Neira Ayuso | 7c62234 | 2012-06-19 02:10:57 +0200 | [diff] [blame] | 3200 | #ifdef CONFIG_NETFILTER_NETLINK_QUEUE_CT |
Pablo Neira Ayuso | 9cb0176 | 2012-06-07 12:13:39 +0200 | [diff] [blame] | 3201 | /* setup interaction between nf_queue and nf_conntrack_netlink. */ |
| 3202 | RCU_INIT_POINTER(nfq_ct_hook, &ctnetlink_nfqueue_hook); |
| 3203 | #endif |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3204 | return 0; |
| 3205 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3206 | err_unreg_exp_subsys: |
| 3207 | nfnetlink_subsys_unregister(&ctnl_exp_subsys); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3208 | err_unreg_subsys: |
| 3209 | nfnetlink_subsys_unregister(&ctnl_subsys); |
| 3210 | err_out: |
| 3211 | return ret; |
| 3212 | } |
| 3213 | |
| 3214 | static void __exit ctnetlink_exit(void) |
| 3215 | { |
Stephen Hemminger | 654d0fb | 2010-05-13 15:02:08 +0200 | [diff] [blame] | 3216 | pr_info("ctnetlink: unregistering from nfnetlink.\n"); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3217 | |
Pablo Neira Ayuso | 70e9942 | 2011-11-22 00:16:51 +0100 | [diff] [blame] | 3218 | unregister_pernet_subsys(&ctnetlink_net_ops); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3219 | nfnetlink_subsys_unregister(&ctnl_exp_subsys); |
| 3220 | nfnetlink_subsys_unregister(&ctnl_subsys); |
Pablo Neira Ayuso | 7c62234 | 2012-06-19 02:10:57 +0200 | [diff] [blame] | 3221 | #ifdef CONFIG_NETFILTER_NETLINK_QUEUE_CT |
Pablo Neira Ayuso | 9cb0176 | 2012-06-07 12:13:39 +0200 | [diff] [blame] | 3222 | RCU_INIT_POINTER(nfq_ct_hook, NULL); |
| 3223 | #endif |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3224 | } |
| 3225 | |
| 3226 | module_init(ctnetlink_init); |
| 3227 | module_exit(ctnetlink_exit); |