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 |
Pablo Neira Ayuso | 80e60e6 | 2011-12-24 14:11:39 +0100 | [diff] [blame] | 214 | dump_counters(struct sk_buff *skb, u64 pkts, u64 bytes, |
| 215 | enum ip_conntrack_dir dir) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 216 | { |
| 217 | enum ctattr_type type = dir ? CTA_COUNTERS_REPLY: CTA_COUNTERS_ORIG; |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 218 | struct nlattr *nest_count; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 219 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 220 | nest_count = nla_nest_start(skb, type | NLA_F_NESTED); |
| 221 | if (!nest_count) |
| 222 | goto nla_put_failure; |
| 223 | |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 224 | if (nla_put_be64(skb, CTA_COUNTERS_PACKETS, cpu_to_be64(pkts)) || |
| 225 | nla_put_be64(skb, CTA_COUNTERS_BYTES, cpu_to_be64(bytes))) |
| 226 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 227 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 228 | nla_nest_end(skb, nest_count); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 229 | |
| 230 | return 0; |
| 231 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 232 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 233 | return -1; |
| 234 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 235 | |
Pablo Neira Ayuso | a992ca2 | 2011-01-19 16:00:07 +0100 | [diff] [blame] | 236 | static int |
Pablo Neira Ayuso | 80e60e6 | 2011-12-24 14:11:39 +0100 | [diff] [blame] | 237 | ctnetlink_dump_counters(struct sk_buff *skb, const struct nf_conn *ct, |
| 238 | enum ip_conntrack_dir dir, int type) |
| 239 | { |
Holger Eitzenberger | f7b13e4 | 2013-09-26 17:31:51 +0200 | [diff] [blame^] | 240 | struct nf_conn_acct *acct; |
| 241 | struct nf_conn_counter *counter; |
Pablo Neira Ayuso | 80e60e6 | 2011-12-24 14:11:39 +0100 | [diff] [blame] | 242 | u64 pkts, bytes; |
| 243 | |
| 244 | acct = nf_conn_acct_find(ct); |
| 245 | if (!acct) |
| 246 | return 0; |
| 247 | |
Holger Eitzenberger | f7b13e4 | 2013-09-26 17:31:51 +0200 | [diff] [blame^] | 248 | counter = acct->counter; |
Pablo Neira Ayuso | 80e60e6 | 2011-12-24 14:11:39 +0100 | [diff] [blame] | 249 | if (type == IPCTNL_MSG_CT_GET_CTRZERO) { |
Holger Eitzenberger | f7b13e4 | 2013-09-26 17:31:51 +0200 | [diff] [blame^] | 250 | pkts = atomic64_xchg(&counter[dir].packets, 0); |
| 251 | bytes = atomic64_xchg(&counter[dir].bytes, 0); |
Pablo Neira Ayuso | 80e60e6 | 2011-12-24 14:11:39 +0100 | [diff] [blame] | 252 | } else { |
Holger Eitzenberger | f7b13e4 | 2013-09-26 17:31:51 +0200 | [diff] [blame^] | 253 | pkts = atomic64_read(&counter[dir].packets); |
| 254 | bytes = atomic64_read(&counter[dir].bytes); |
Pablo Neira Ayuso | 80e60e6 | 2011-12-24 14:11:39 +0100 | [diff] [blame] | 255 | } |
| 256 | return dump_counters(skb, pkts, bytes, dir); |
| 257 | } |
| 258 | |
| 259 | static int |
Pablo Neira Ayuso | a992ca2 | 2011-01-19 16:00:07 +0100 | [diff] [blame] | 260 | ctnetlink_dump_timestamp(struct sk_buff *skb, const struct nf_conn *ct) |
| 261 | { |
| 262 | struct nlattr *nest_count; |
| 263 | const struct nf_conn_tstamp *tstamp; |
| 264 | |
| 265 | tstamp = nf_conn_tstamp_find(ct); |
| 266 | if (!tstamp) |
| 267 | return 0; |
| 268 | |
| 269 | nest_count = nla_nest_start(skb, CTA_TIMESTAMP | NLA_F_NESTED); |
| 270 | if (!nest_count) |
| 271 | goto nla_put_failure; |
| 272 | |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 273 | if (nla_put_be64(skb, CTA_TIMESTAMP_START, cpu_to_be64(tstamp->start)) || |
| 274 | (tstamp->stop != 0 && nla_put_be64(skb, CTA_TIMESTAMP_STOP, |
| 275 | cpu_to_be64(tstamp->stop)))) |
| 276 | goto nla_put_failure; |
Pablo Neira Ayuso | a992ca2 | 2011-01-19 16:00:07 +0100 | [diff] [blame] | 277 | nla_nest_end(skb, nest_count); |
| 278 | |
| 279 | return 0; |
| 280 | |
| 281 | nla_put_failure: |
| 282 | return -1; |
| 283 | } |
| 284 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 285 | #ifdef CONFIG_NF_CONNTRACK_MARK |
| 286 | static inline int |
| 287 | ctnetlink_dump_mark(struct sk_buff *skb, const struct nf_conn *ct) |
| 288 | { |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 289 | if (nla_put_be32(skb, CTA_MARK, htonl(ct->mark))) |
| 290 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 291 | return 0; |
| 292 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 293 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 294 | return -1; |
| 295 | } |
| 296 | #else |
| 297 | #define ctnetlink_dump_mark(a, b) (0) |
| 298 | #endif |
| 299 | |
Pablo Neira Ayuso | 37fccd8 | 2007-12-17 22:28:41 -0800 | [diff] [blame] | 300 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
| 301 | static inline int |
Eric Paris | 1cc6324 | 2010-10-13 16:24:54 -0400 | [diff] [blame] | 302 | 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] | 303 | { |
Eric Paris | 1cc6324 | 2010-10-13 16:24:54 -0400 | [diff] [blame] | 304 | struct nlattr *nest_secctx; |
| 305 | int len, ret; |
| 306 | char *secctx; |
Pablo Neira Ayuso | 37fccd8 | 2007-12-17 22:28:41 -0800 | [diff] [blame] | 307 | |
Eric Paris | 1cc6324 | 2010-10-13 16:24:54 -0400 | [diff] [blame] | 308 | ret = security_secid_to_secctx(ct->secmark, &secctx, &len); |
| 309 | if (ret) |
Pablo Neira Ayuso | cba85b5 | 2011-01-06 11:25:00 -0800 | [diff] [blame] | 310 | return 0; |
Eric Paris | 1cc6324 | 2010-10-13 16:24:54 -0400 | [diff] [blame] | 311 | |
| 312 | ret = -1; |
| 313 | nest_secctx = nla_nest_start(skb, CTA_SECCTX | NLA_F_NESTED); |
| 314 | if (!nest_secctx) |
| 315 | goto nla_put_failure; |
| 316 | |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 317 | if (nla_put_string(skb, CTA_SECCTX_NAME, secctx)) |
| 318 | goto nla_put_failure; |
Eric Paris | 1cc6324 | 2010-10-13 16:24:54 -0400 | [diff] [blame] | 319 | nla_nest_end(skb, nest_secctx); |
| 320 | |
| 321 | ret = 0; |
Pablo Neira Ayuso | 37fccd8 | 2007-12-17 22:28:41 -0800 | [diff] [blame] | 322 | nla_put_failure: |
Eric Paris | 1cc6324 | 2010-10-13 16:24:54 -0400 | [diff] [blame] | 323 | security_release_secctx(secctx, len); |
| 324 | return ret; |
Pablo Neira Ayuso | 37fccd8 | 2007-12-17 22:28:41 -0800 | [diff] [blame] | 325 | } |
| 326 | #else |
Eric Paris | 1cc6324 | 2010-10-13 16:24:54 -0400 | [diff] [blame] | 327 | #define ctnetlink_dump_secctx(a, b) (0) |
Pablo Neira Ayuso | 37fccd8 | 2007-12-17 22:28:41 -0800 | [diff] [blame] | 328 | #endif |
| 329 | |
Florian Westphal | 0ceabd8 | 2013-01-11 06:30:45 +0000 | [diff] [blame] | 330 | #ifdef CONFIG_NF_CONNTRACK_LABELS |
| 331 | static int ctnetlink_label_size(const struct nf_conn *ct) |
| 332 | { |
| 333 | struct nf_conn_labels *labels = nf_ct_labels_find(ct); |
| 334 | |
| 335 | if (!labels) |
| 336 | return 0; |
| 337 | return nla_total_size(labels->words * sizeof(long)); |
| 338 | } |
| 339 | |
| 340 | static int |
| 341 | ctnetlink_dump_labels(struct sk_buff *skb, const struct nf_conn *ct) |
| 342 | { |
| 343 | struct nf_conn_labels *labels = nf_ct_labels_find(ct); |
| 344 | unsigned int len, i; |
| 345 | |
| 346 | if (!labels) |
| 347 | return 0; |
| 348 | |
| 349 | len = labels->words * sizeof(long); |
| 350 | i = 0; |
| 351 | do { |
| 352 | if (labels->bits[i] != 0) |
| 353 | return nla_put(skb, CTA_LABELS, len, labels->bits); |
| 354 | i++; |
| 355 | } while (i < labels->words); |
| 356 | |
| 357 | return 0; |
| 358 | } |
| 359 | #else |
| 360 | #define ctnetlink_dump_labels(a, b) (0) |
| 361 | #define ctnetlink_label_size(a) (0) |
| 362 | #endif |
| 363 | |
Pablo Neira Ayuso | 0f417ce | 2007-12-17 22:28:19 -0800 | [diff] [blame] | 364 | #define master_tuple(ct) &(ct->master->tuplehash[IP_CT_DIR_ORIGINAL].tuple) |
| 365 | |
| 366 | static inline int |
| 367 | ctnetlink_dump_master(struct sk_buff *skb, const struct nf_conn *ct) |
| 368 | { |
| 369 | struct nlattr *nest_parms; |
| 370 | |
| 371 | if (!(ct->status & IPS_EXPECTED)) |
| 372 | return 0; |
| 373 | |
| 374 | nest_parms = nla_nest_start(skb, CTA_TUPLE_MASTER | NLA_F_NESTED); |
| 375 | if (!nest_parms) |
| 376 | goto nla_put_failure; |
| 377 | if (ctnetlink_dump_tuples(skb, master_tuple(ct)) < 0) |
| 378 | goto nla_put_failure; |
| 379 | nla_nest_end(skb, nest_parms); |
| 380 | |
| 381 | return 0; |
| 382 | |
| 383 | nla_put_failure: |
| 384 | return -1; |
| 385 | } |
| 386 | |
Ilpo Järvinen | bb5cf80 | 2008-01-05 23:11:31 -0800 | [diff] [blame] | 387 | static int |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 388 | 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] | 389 | { |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 390 | struct nlattr *nest_parms; |
| 391 | |
| 392 | nest_parms = nla_nest_start(skb, type | NLA_F_NESTED); |
| 393 | if (!nest_parms) |
| 394 | goto nla_put_failure; |
| 395 | |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 396 | if (nla_put_be32(skb, CTA_SEQADJ_CORRECTION_POS, |
| 397 | htonl(seq->correction_pos)) || |
| 398 | nla_put_be32(skb, CTA_SEQADJ_OFFSET_BEFORE, |
| 399 | htonl(seq->offset_before)) || |
| 400 | nla_put_be32(skb, CTA_SEQADJ_OFFSET_AFTER, |
| 401 | htonl(seq->offset_after))) |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 402 | goto nla_put_failure; |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 403 | |
| 404 | nla_nest_end(skb, nest_parms); |
| 405 | |
| 406 | return 0; |
| 407 | |
| 408 | nla_put_failure: |
| 409 | return -1; |
| 410 | } |
| 411 | |
| 412 | static inline int |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 413 | 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] | 414 | { |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 415 | struct nf_conn_seqadj *seqadj = nfct_seqadj(ct); |
| 416 | struct nf_ct_seqadj *seq; |
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 | if (!(ct->status & IPS_SEQ_ADJUST) || !seqadj) |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 419 | return 0; |
| 420 | |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 421 | seq = &seqadj->seq[IP_CT_DIR_ORIGINAL]; |
| 422 | 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] | 423 | return -1; |
| 424 | |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 425 | seq = &seqadj->seq[IP_CT_DIR_REPLY]; |
| 426 | 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] | 427 | return -1; |
| 428 | |
| 429 | return 0; |
| 430 | } |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 431 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 432 | static inline int |
| 433 | ctnetlink_dump_id(struct sk_buff *skb, const struct nf_conn *ct) |
| 434 | { |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 435 | if (nla_put_be32(skb, CTA_ID, htonl((unsigned long)ct))) |
| 436 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 437 | return 0; |
| 438 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 439 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 440 | return -1; |
| 441 | } |
| 442 | |
| 443 | static inline int |
| 444 | ctnetlink_dump_use(struct sk_buff *skb, const struct nf_conn *ct) |
| 445 | { |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 446 | if (nla_put_be32(skb, CTA_USE, htonl(atomic_read(&ct->ct_general.use)))) |
| 447 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 448 | return 0; |
| 449 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 450 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 451 | return -1; |
| 452 | } |
| 453 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 454 | static int |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 455 | 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] | 456 | struct nf_conn *ct) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 457 | { |
| 458 | struct nlmsghdr *nlh; |
| 459 | struct nfgenmsg *nfmsg; |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 460 | struct nlattr *nest_parms; |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 461 | unsigned int flags = portid ? NLM_F_MULTI : 0, event; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 462 | |
Pablo Neira Ayuso | 80e60e6 | 2011-12-24 14:11:39 +0100 | [diff] [blame] | 463 | event = (NFNL_SUBSYS_CTNETLINK << 8 | IPCTNL_MSG_CT_NEW); |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 464 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags); |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 465 | if (nlh == NULL) |
| 466 | goto nlmsg_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 467 | |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 468 | nfmsg = nlmsg_data(nlh); |
Patrick McHardy | 5e8fbe2 | 2008-04-14 11:15:52 +0200 | [diff] [blame] | 469 | nfmsg->nfgen_family = nf_ct_l3num(ct); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 470 | nfmsg->version = NFNETLINK_V0; |
| 471 | nfmsg->res_id = 0; |
| 472 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 473 | nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED); |
| 474 | if (!nest_parms) |
| 475 | goto nla_put_failure; |
Pablo Neira Ayuso | f2f3e38 | 2009-06-02 20:03:35 +0200 | [diff] [blame] | 476 | 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] | 477 | goto nla_put_failure; |
| 478 | nla_nest_end(skb, nest_parms); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 479 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 480 | nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED); |
| 481 | if (!nest_parms) |
| 482 | goto nla_put_failure; |
Pablo Neira Ayuso | f2f3e38 | 2009-06-02 20:03:35 +0200 | [diff] [blame] | 483 | 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] | 484 | goto nla_put_failure; |
| 485 | nla_nest_end(skb, nest_parms); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 486 | |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 487 | if (nf_ct_zone(ct) && |
| 488 | nla_put_be16(skb, CTA_ZONE, htons(nf_ct_zone(ct)))) |
| 489 | goto nla_put_failure; |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 490 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 491 | if (ctnetlink_dump_status(skb, ct) < 0 || |
| 492 | ctnetlink_dump_timeout(skb, ct) < 0 || |
Pablo Neira Ayuso | 80e60e6 | 2011-12-24 14:11:39 +0100 | [diff] [blame] | 493 | ctnetlink_dump_counters(skb, ct, IP_CT_DIR_ORIGINAL, type) < 0 || |
| 494 | ctnetlink_dump_counters(skb, ct, IP_CT_DIR_REPLY, type) < 0 || |
Pablo Neira Ayuso | a992ca2 | 2011-01-19 16:00:07 +0100 | [diff] [blame] | 495 | ctnetlink_dump_timestamp(skb, ct) < 0 || |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 496 | ctnetlink_dump_protoinfo(skb, ct) < 0 || |
| 497 | ctnetlink_dump_helpinfo(skb, ct) < 0 || |
| 498 | ctnetlink_dump_mark(skb, ct) < 0 || |
Eric Paris | 1cc6324 | 2010-10-13 16:24:54 -0400 | [diff] [blame] | 499 | ctnetlink_dump_secctx(skb, ct) < 0 || |
Florian Westphal | 0ceabd8 | 2013-01-11 06:30:45 +0000 | [diff] [blame] | 500 | ctnetlink_dump_labels(skb, ct) < 0 || |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 501 | ctnetlink_dump_id(skb, ct) < 0 || |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 502 | ctnetlink_dump_use(skb, ct) < 0 || |
Pablo Neira Ayuso | 0f417ce | 2007-12-17 22:28:19 -0800 | [diff] [blame] | 503 | ctnetlink_dump_master(skb, ct) < 0 || |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 504 | ctnetlink_dump_ct_seq_adj(skb, ct) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 505 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 506 | |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 507 | nlmsg_end(skb, nlh); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 508 | return skb->len; |
| 509 | |
| 510 | nlmsg_failure: |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 511 | nla_put_failure: |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 512 | nlmsg_cancel(skb, nlh); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 513 | return -1; |
| 514 | } |
| 515 | |
Pablo Neira Ayuso | 03b64f5 | 2009-06-02 20:08:27 +0200 | [diff] [blame] | 516 | static inline size_t |
| 517 | ctnetlink_proto_size(const struct nf_conn *ct) |
Holger Eitzenberger | 2732c4e | 2009-03-25 21:50:59 +0100 | [diff] [blame] | 518 | { |
| 519 | struct nf_conntrack_l3proto *l3proto; |
| 520 | struct nf_conntrack_l4proto *l4proto; |
Pablo Neira Ayuso | 03b64f5 | 2009-06-02 20:08:27 +0200 | [diff] [blame] | 521 | size_t len = 0; |
Holger Eitzenberger | 2732c4e | 2009-03-25 21:50:59 +0100 | [diff] [blame] | 522 | |
| 523 | rcu_read_lock(); |
Pablo Neira Ayuso | 03b64f5 | 2009-06-02 20:08:27 +0200 | [diff] [blame] | 524 | l3proto = __nf_ct_l3proto_find(nf_ct_l3num(ct)); |
Holger Eitzenberger | 2732c4e | 2009-03-25 21:50:59 +0100 | [diff] [blame] | 525 | len += l3proto->nla_size; |
| 526 | |
Pablo Neira Ayuso | 03b64f5 | 2009-06-02 20:08:27 +0200 | [diff] [blame] | 527 | 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] | 528 | len += l4proto->nla_size; |
| 529 | rcu_read_unlock(); |
| 530 | |
Pablo Neira Ayuso | 03b64f5 | 2009-06-02 20:08:27 +0200 | [diff] [blame] | 531 | return len; |
| 532 | } |
| 533 | |
| 534 | static inline size_t |
Holger Eitzenberger | f7b13e4 | 2013-09-26 17:31:51 +0200 | [diff] [blame^] | 535 | ctnetlink_acct_size(const struct nf_conn *ct) |
Jiri Pirko | d26e6a0 | 2010-04-01 12:39:19 +0200 | [diff] [blame] | 536 | { |
| 537 | if (!nf_ct_ext_exist(ct, NF_CT_EXT_ACCT)) |
| 538 | return 0; |
| 539 | return 2 * nla_total_size(0) /* CTA_COUNTERS_ORIG|REPL */ |
| 540 | + 2 * nla_total_size(sizeof(uint64_t)) /* CTA_COUNTERS_PACKETS */ |
| 541 | + 2 * nla_total_size(sizeof(uint64_t)) /* CTA_COUNTERS_BYTES */ |
| 542 | ; |
| 543 | } |
| 544 | |
Pablo Neira Ayuso | cba85b5 | 2011-01-06 11:25:00 -0800 | [diff] [blame] | 545 | static inline int |
| 546 | ctnetlink_secctx_size(const struct nf_conn *ct) |
Eric Paris | 1cc6324 | 2010-10-13 16:24:54 -0400 | [diff] [blame] | 547 | { |
Pablo Neira Ayuso | cba85b5 | 2011-01-06 11:25:00 -0800 | [diff] [blame] | 548 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
| 549 | int len, ret; |
Eric Paris | 1cc6324 | 2010-10-13 16:24:54 -0400 | [diff] [blame] | 550 | |
Pablo Neira Ayuso | cba85b5 | 2011-01-06 11:25:00 -0800 | [diff] [blame] | 551 | ret = security_secid_to_secctx(ct->secmark, NULL, &len); |
| 552 | if (ret) |
| 553 | return 0; |
Eric Paris | 1cc6324 | 2010-10-13 16:24:54 -0400 | [diff] [blame] | 554 | |
Pablo Neira Ayuso | cba85b5 | 2011-01-06 11:25:00 -0800 | [diff] [blame] | 555 | return nla_total_size(0) /* CTA_SECCTX */ |
| 556 | + nla_total_size(sizeof(char) * len); /* CTA_SECCTX_NAME */ |
| 557 | #else |
| 558 | return 0; |
Eric Paris | 1cc6324 | 2010-10-13 16:24:54 -0400 | [diff] [blame] | 559 | #endif |
Pablo Neira Ayuso | cba85b5 | 2011-01-06 11:25:00 -0800 | [diff] [blame] | 560 | } |
Eric Paris | 1cc6324 | 2010-10-13 16:24:54 -0400 | [diff] [blame] | 561 | |
Jiri Pirko | d26e6a0 | 2010-04-01 12:39:19 +0200 | [diff] [blame] | 562 | static inline size_t |
Pablo Neira Ayuso | a992ca2 | 2011-01-19 16:00:07 +0100 | [diff] [blame] | 563 | ctnetlink_timestamp_size(const struct nf_conn *ct) |
| 564 | { |
| 565 | #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP |
| 566 | if (!nf_ct_ext_exist(ct, NF_CT_EXT_TSTAMP)) |
| 567 | return 0; |
| 568 | return nla_total_size(0) + 2 * nla_total_size(sizeof(uint64_t)); |
| 569 | #else |
| 570 | return 0; |
| 571 | #endif |
| 572 | } |
| 573 | |
| 574 | static inline size_t |
Pablo Neira Ayuso | 03b64f5 | 2009-06-02 20:08:27 +0200 | [diff] [blame] | 575 | ctnetlink_nlmsg_size(const struct nf_conn *ct) |
| 576 | { |
| 577 | return NLMSG_ALIGN(sizeof(struct nfgenmsg)) |
| 578 | + 3 * nla_total_size(0) /* CTA_TUPLE_ORIG|REPL|MASTER */ |
| 579 | + 3 * nla_total_size(0) /* CTA_TUPLE_IP */ |
| 580 | + 3 * nla_total_size(0) /* CTA_TUPLE_PROTO */ |
| 581 | + 3 * nla_total_size(sizeof(u_int8_t)) /* CTA_PROTO_NUM */ |
| 582 | + nla_total_size(sizeof(u_int32_t)) /* CTA_ID */ |
| 583 | + nla_total_size(sizeof(u_int32_t)) /* CTA_STATUS */ |
Holger Eitzenberger | f7b13e4 | 2013-09-26 17:31:51 +0200 | [diff] [blame^] | 584 | + ctnetlink_acct_size(ct) |
Pablo Neira Ayuso | a992ca2 | 2011-01-19 16:00:07 +0100 | [diff] [blame] | 585 | + ctnetlink_timestamp_size(ct) |
Pablo Neira Ayuso | 03b64f5 | 2009-06-02 20:08:27 +0200 | [diff] [blame] | 586 | + nla_total_size(sizeof(u_int32_t)) /* CTA_TIMEOUT */ |
| 587 | + nla_total_size(0) /* CTA_PROTOINFO */ |
| 588 | + nla_total_size(0) /* CTA_HELP */ |
| 589 | + nla_total_size(NF_CT_HELPER_NAME_LEN) /* CTA_HELP_NAME */ |
Pablo Neira Ayuso | cba85b5 | 2011-01-06 11:25:00 -0800 | [diff] [blame] | 590 | + ctnetlink_secctx_size(ct) |
Pablo Neira Ayuso | 03b64f5 | 2009-06-02 20:08:27 +0200 | [diff] [blame] | 591 | #ifdef CONFIG_NF_NAT_NEEDED |
| 592 | + 2 * nla_total_size(0) /* CTA_NAT_SEQ_ADJ_ORIG|REPL */ |
| 593 | + 6 * nla_total_size(sizeof(u_int32_t)) /* CTA_NAT_SEQ_OFFSET */ |
| 594 | #endif |
| 595 | #ifdef CONFIG_NF_CONNTRACK_MARK |
| 596 | + nla_total_size(sizeof(u_int32_t)) /* CTA_MARK */ |
| 597 | #endif |
| 598 | + ctnetlink_proto_size(ct) |
Florian Westphal | 0ceabd8 | 2013-01-11 06:30:45 +0000 | [diff] [blame] | 599 | + ctnetlink_label_size(ct) |
Pablo Neira Ayuso | 03b64f5 | 2009-06-02 20:08:27 +0200 | [diff] [blame] | 600 | ; |
Holger Eitzenberger | 2732c4e | 2009-03-25 21:50:59 +0100 | [diff] [blame] | 601 | } |
| 602 | |
Pablo Neira Ayuso | 8e36c4b | 2012-06-23 01:43:51 +0200 | [diff] [blame] | 603 | #ifdef CONFIG_NF_CONNTRACK_EVENTS |
Pablo Neira Ayuso | e34d5c1 | 2009-06-03 10:32:06 +0200 | [diff] [blame] | 604 | static int |
| 605 | ctnetlink_conntrack_event(unsigned int events, struct nf_ct_event *item) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 606 | { |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 607 | struct net *net; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 608 | struct nlmsghdr *nlh; |
| 609 | struct nfgenmsg *nfmsg; |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 610 | struct nlattr *nest_parms; |
Pablo Neira Ayuso | 19abb7b | 2008-11-18 11:56:20 +0100 | [diff] [blame] | 611 | struct nf_conn *ct = item->ct; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 612 | struct sk_buff *skb; |
| 613 | unsigned int type; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 614 | unsigned int flags = 0, group; |
Pablo Neira Ayuso | dd7669a | 2009-06-13 12:30:52 +0200 | [diff] [blame] | 615 | int err; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 616 | |
| 617 | /* ignore our fake conntrack entry */ |
Eric Dumazet | 5bfddbd | 2010-06-08 16:09:52 +0200 | [diff] [blame] | 618 | if (nf_ct_is_untracked(ct)) |
Pablo Neira Ayuso | e34d5c1 | 2009-06-03 10:32:06 +0200 | [diff] [blame] | 619 | return 0; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 620 | |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 621 | if (events & (1 << IPCT_DESTROY)) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 622 | type = IPCTNL_MSG_CT_DELETE; |
| 623 | group = NFNLGRP_CONNTRACK_DESTROY; |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 624 | } else if (events & ((1 << IPCT_NEW) | (1 << IPCT_RELATED))) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 625 | type = IPCTNL_MSG_CT_NEW; |
| 626 | flags = NLM_F_CREATE|NLM_F_EXCL; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 627 | group = NFNLGRP_CONNTRACK_NEW; |
Pablo Neira Ayuso | 17e6e4e | 2009-06-02 20:08:46 +0200 | [diff] [blame] | 628 | } else if (events) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 629 | type = IPCTNL_MSG_CT_NEW; |
| 630 | group = NFNLGRP_CONNTRACK_UPDATE; |
| 631 | } else |
Pablo Neira Ayuso | e34d5c1 | 2009-06-03 10:32:06 +0200 | [diff] [blame] | 632 | return 0; |
Patrick McHardy | a242769 | 2006-03-20 18:03:59 -0800 | [diff] [blame] | 633 | |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 634 | net = nf_ct_net(ct); |
| 635 | if (!item->report && !nfnetlink_has_listeners(net, group)) |
Pablo Neira Ayuso | e34d5c1 | 2009-06-03 10:32:06 +0200 | [diff] [blame] | 636 | return 0; |
Patrick McHardy | a242769 | 2006-03-20 18:03:59 -0800 | [diff] [blame] | 637 | |
Pablo Neira Ayuso | 03b64f5 | 2009-06-02 20:08:27 +0200 | [diff] [blame] | 638 | skb = nlmsg_new(ctnetlink_nlmsg_size(ct), GFP_ATOMIC); |
| 639 | if (skb == NULL) |
Pablo Neira Ayuso | 150ace0 | 2009-04-17 17:47:31 +0200 | [diff] [blame] | 640 | goto errout; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 641 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 642 | type |= NFNL_SUBSYS_CTNETLINK << 8; |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 643 | nlh = nlmsg_put(skb, item->portid, 0, type, sizeof(*nfmsg), flags); |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 644 | if (nlh == NULL) |
| 645 | goto nlmsg_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 646 | |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 647 | nfmsg = nlmsg_data(nlh); |
Patrick McHardy | 5e8fbe2 | 2008-04-14 11:15:52 +0200 | [diff] [blame] | 648 | nfmsg->nfgen_family = nf_ct_l3num(ct); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 649 | nfmsg->version = NFNETLINK_V0; |
| 650 | nfmsg->res_id = 0; |
| 651 | |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 652 | rcu_read_lock(); |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 653 | nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED); |
| 654 | if (!nest_parms) |
| 655 | goto nla_put_failure; |
Pablo Neira Ayuso | f2f3e38 | 2009-06-02 20:03:35 +0200 | [diff] [blame] | 656 | 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] | 657 | goto nla_put_failure; |
| 658 | nla_nest_end(skb, nest_parms); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 659 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 660 | nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED); |
| 661 | if (!nest_parms) |
| 662 | goto nla_put_failure; |
Pablo Neira Ayuso | f2f3e38 | 2009-06-02 20:03:35 +0200 | [diff] [blame] | 663 | 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] | 664 | goto nla_put_failure; |
| 665 | nla_nest_end(skb, nest_parms); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 666 | |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 667 | if (nf_ct_zone(ct) && |
| 668 | nla_put_be16(skb, CTA_ZONE, htons(nf_ct_zone(ct)))) |
| 669 | goto nla_put_failure; |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 670 | |
Eric Leblond | 1eedf69 | 2008-05-13 23:27:11 -0700 | [diff] [blame] | 671 | if (ctnetlink_dump_id(skb, ct) < 0) |
| 672 | goto nla_put_failure; |
| 673 | |
Fabian Hugelshofer | e57dce6 | 2008-06-09 15:59:58 -0700 | [diff] [blame] | 674 | if (ctnetlink_dump_status(skb, ct) < 0) |
| 675 | goto nla_put_failure; |
| 676 | |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 677 | if (events & (1 << IPCT_DESTROY)) { |
Pablo Neira Ayuso | 80e60e6 | 2011-12-24 14:11:39 +0100 | [diff] [blame] | 678 | if (ctnetlink_dump_counters(skb, ct, |
| 679 | IP_CT_DIR_ORIGINAL, type) < 0 || |
| 680 | ctnetlink_dump_counters(skb, ct, |
| 681 | IP_CT_DIR_REPLY, type) < 0 || |
Pablo Neira Ayuso | a992ca2 | 2011-01-19 16:00:07 +0100 | [diff] [blame] | 682 | ctnetlink_dump_timestamp(skb, ct) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 683 | goto nla_put_failure; |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 684 | } else { |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 685 | if (ctnetlink_dump_timeout(skb, ct) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 686 | goto nla_put_failure; |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 687 | |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 688 | if (events & (1 << IPCT_PROTOINFO) |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 689 | && ctnetlink_dump_protoinfo(skb, ct) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 690 | goto nla_put_failure; |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 691 | |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 692 | if ((events & (1 << IPCT_HELPER) || nfct_help(ct)) |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 693 | && ctnetlink_dump_helpinfo(skb, ct) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 694 | goto nla_put_failure; |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 695 | |
Eric Paris | ff660c8 | 2010-10-19 18:17:32 -0400 | [diff] [blame] | 696 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 697 | if ((events & (1 << IPCT_SECMARK) || ct->secmark) |
Eric Paris | 1cc6324 | 2010-10-13 16:24:54 -0400 | [diff] [blame] | 698 | && ctnetlink_dump_secctx(skb, ct) < 0) |
Pablo Neira Ayuso | 37fccd8 | 2007-12-17 22:28:41 -0800 | [diff] [blame] | 699 | goto nla_put_failure; |
Eric Paris | ff660c8 | 2010-10-19 18:17:32 -0400 | [diff] [blame] | 700 | #endif |
Florian Westphal | 0ceabd8 | 2013-01-11 06:30:45 +0000 | [diff] [blame] | 701 | if (events & (1 << IPCT_LABEL) && |
| 702 | ctnetlink_dump_labels(skb, ct) < 0) |
| 703 | goto nla_put_failure; |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 704 | |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 705 | if (events & (1 << IPCT_RELATED) && |
Pablo Neira Ayuso | 0f417ce | 2007-12-17 22:28:19 -0800 | [diff] [blame] | 706 | ctnetlink_dump_master(skb, ct) < 0) |
| 707 | goto nla_put_failure; |
| 708 | |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 709 | if (events & (1 << IPCT_SEQADJ) && |
| 710 | ctnetlink_dump_ct_seq_adj(skb, ct) < 0) |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 711 | goto nla_put_failure; |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 712 | } |
Pablo Neira Ayuso | b9a37e0 | 2006-08-22 00:31:49 -0700 | [diff] [blame] | 713 | |
Eric Leblond | a83099a | 2008-01-31 04:44:27 -0800 | [diff] [blame] | 714 | #ifdef CONFIG_NF_CONNTRACK_MARK |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 715 | if ((events & (1 << IPCT_MARK) || ct->mark) |
Eric Leblond | a83099a | 2008-01-31 04:44:27 -0800 | [diff] [blame] | 716 | && ctnetlink_dump_mark(skb, ct) < 0) |
| 717 | goto nla_put_failure; |
| 718 | #endif |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 719 | rcu_read_unlock(); |
Eric Leblond | a83099a | 2008-01-31 04:44:27 -0800 | [diff] [blame] | 720 | |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 721 | nlmsg_end(skb, nlh); |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 722 | err = nfnetlink_send(skb, net, item->portid, group, item->report, |
Alexey Dobriyan | cd8c20b | 2010-01-13 16:02:14 +0100 | [diff] [blame] | 723 | GFP_ATOMIC); |
Pablo Neira Ayuso | dd7669a | 2009-06-13 12:30:52 +0200 | [diff] [blame] | 724 | if (err == -ENOBUFS || err == -EAGAIN) |
| 725 | return -ENOBUFS; |
| 726 | |
Pablo Neira Ayuso | e34d5c1 | 2009-06-03 10:32:06 +0200 | [diff] [blame] | 727 | return 0; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 728 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 729 | nla_put_failure: |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 730 | rcu_read_unlock(); |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 731 | nlmsg_cancel(skb, nlh); |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 732 | nlmsg_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 733 | kfree_skb(skb); |
Pablo Neira Ayuso | 150ace0 | 2009-04-17 17:47:31 +0200 | [diff] [blame] | 734 | errout: |
Pablo Neira Ayuso | 37b7ef7 | 2010-03-16 13:30:21 +0000 | [diff] [blame] | 735 | if (nfnetlink_set_err(net, 0, group, -ENOBUFS) > 0) |
| 736 | return -ENOBUFS; |
| 737 | |
Pablo Neira Ayuso | e34d5c1 | 2009-06-03 10:32:06 +0200 | [diff] [blame] | 738 | return 0; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 739 | } |
| 740 | #endif /* CONFIG_NF_CONNTRACK_EVENTS */ |
| 741 | |
| 742 | static int ctnetlink_done(struct netlink_callback *cb) |
| 743 | { |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 744 | if (cb->args[1]) |
| 745 | nf_ct_put((struct nf_conn *)cb->args[1]); |
Pablo Neira Ayuso | 0f298a2 | 2012-02-24 14:41:50 +0000 | [diff] [blame] | 746 | if (cb->data) |
| 747 | kfree(cb->data); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 748 | return 0; |
| 749 | } |
| 750 | |
Pablo Neira Ayuso | 0f298a2 | 2012-02-24 14:41:50 +0000 | [diff] [blame] | 751 | struct ctnetlink_dump_filter { |
| 752 | struct { |
| 753 | u_int32_t val; |
| 754 | u_int32_t mask; |
| 755 | } mark; |
| 756 | }; |
| 757 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 758 | static int |
| 759 | ctnetlink_dump_table(struct sk_buff *skb, struct netlink_callback *cb) |
| 760 | { |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 761 | struct net *net = sock_net(skb->sk); |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 762 | struct nf_conn *ct, *last; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 763 | struct nf_conntrack_tuple_hash *h; |
Eric Dumazet | ea781f1 | 2009-03-25 21:05:46 +0100 | [diff] [blame] | 764 | struct hlist_nulls_node *n; |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 765 | struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh); |
Pablo Neira Ayuso | 87711cb | 2006-01-05 12:19:23 -0800 | [diff] [blame] | 766 | u_int8_t l3proto = nfmsg->nfgen_family; |
Hans Schillstrom | 3b988ec | 2012-03-05 02:24:29 +0000 | [diff] [blame] | 767 | int res; |
Pablo Neira Ayuso | 0f298a2 | 2012-02-24 14:41:50 +0000 | [diff] [blame] | 768 | #ifdef CONFIG_NF_CONNTRACK_MARK |
| 769 | const struct ctnetlink_dump_filter *filter = cb->data; |
| 770 | #endif |
Hans Schillstrom | 3b988ec | 2012-03-05 02:24:29 +0000 | [diff] [blame] | 771 | |
Stephen Hemminger | 13ee6ac | 2011-01-11 23:54:42 +0100 | [diff] [blame] | 772 | spin_lock_bh(&nf_conntrack_lock); |
Patrick McHardy | d205dc4 | 2006-08-17 18:12:38 -0700 | [diff] [blame] | 773 | last = (struct nf_conn *)cb->args[1]; |
Patrick McHardy | 9ab99d5 | 2010-02-10 14:17:10 +0100 | [diff] [blame] | 774 | for (; cb->args[0] < net->ct.htable_size; cb->args[0]++) { |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 775 | restart: |
Stephen Hemminger | 13ee6ac | 2011-01-11 23:54:42 +0100 | [diff] [blame] | 776 | 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] | 777 | hnnode) { |
Jozsef Kadlecsik | 5b1158e | 2006-12-02 22:07:13 -0800 | [diff] [blame] | 778 | if (NF_CT_DIRECTION(h) != IP_CT_DIR_ORIGINAL) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 779 | continue; |
| 780 | ct = nf_ct_tuplehash_to_ctrack(h); |
Pablo Neira Ayuso | 87711cb | 2006-01-05 12:19:23 -0800 | [diff] [blame] | 781 | /* Dump entries of a given L3 protocol number. |
| 782 | * If it is not specified, ie. l3proto == 0, |
| 783 | * then dump everything. */ |
Patrick McHardy | 5e8fbe2 | 2008-04-14 11:15:52 +0200 | [diff] [blame] | 784 | if (l3proto && nf_ct_l3num(ct) != l3proto) |
Stephen Hemminger | 13ee6ac | 2011-01-11 23:54:42 +0100 | [diff] [blame] | 785 | continue; |
Patrick McHardy | d205dc4 | 2006-08-17 18:12:38 -0700 | [diff] [blame] | 786 | if (cb->args[1]) { |
| 787 | if (ct != last) |
Stephen Hemminger | 13ee6ac | 2011-01-11 23:54:42 +0100 | [diff] [blame] | 788 | continue; |
Patrick McHardy | d205dc4 | 2006-08-17 18:12:38 -0700 | [diff] [blame] | 789 | cb->args[1] = 0; |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 790 | } |
Pablo Neira Ayuso | 0f298a2 | 2012-02-24 14:41:50 +0000 | [diff] [blame] | 791 | #ifdef CONFIG_NF_CONNTRACK_MARK |
| 792 | if (filter && !((ct->mark & filter->mark.mask) == |
| 793 | filter->mark.val)) { |
| 794 | continue; |
| 795 | } |
| 796 | #endif |
Hans Schillstrom | 3b988ec | 2012-03-05 02:24:29 +0000 | [diff] [blame] | 797 | rcu_read_lock(); |
| 798 | res = |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 799 | ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).portid, |
Hans Schillstrom | 3b988ec | 2012-03-05 02:24:29 +0000 | [diff] [blame] | 800 | cb->nlh->nlmsg_seq, |
| 801 | NFNL_MSG_TYPE(cb->nlh->nlmsg_type), |
| 802 | ct); |
| 803 | rcu_read_unlock(); |
| 804 | if (res < 0) { |
Pablo Neira Ayuso | c71caf4 | 2011-01-24 19:01:07 +0100 | [diff] [blame] | 805 | nf_conntrack_get(&ct->ct_general); |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 806 | cb->args[1] = (unsigned long)ct; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 807 | goto out; |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 808 | } |
| 809 | } |
Patrick McHardy | d205dc4 | 2006-08-17 18:12:38 -0700 | [diff] [blame] | 810 | if (cb->args[1]) { |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 811 | cb->args[1] = 0; |
| 812 | goto restart; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 813 | } |
| 814 | } |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 815 | out: |
Stephen Hemminger | 13ee6ac | 2011-01-11 23:54:42 +0100 | [diff] [blame] | 816 | spin_unlock_bh(&nf_conntrack_lock); |
Patrick McHardy | d205dc4 | 2006-08-17 18:12:38 -0700 | [diff] [blame] | 817 | if (last) |
| 818 | nf_ct_put(last); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 819 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 820 | return skb->len; |
| 821 | } |
| 822 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 823 | static inline int |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 824 | 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] | 825 | { |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 826 | struct nlattr *tb[CTA_IP_MAX+1]; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 827 | struct nf_conntrack_l3proto *l3proto; |
| 828 | int ret = 0; |
| 829 | |
Daniel Borkmann | 130ffbc | 2013-06-12 17:54:51 +0200 | [diff] [blame] | 830 | ret = nla_parse_nested(tb, CTA_IP_MAX, attr, NULL); |
| 831 | if (ret < 0) |
| 832 | return ret; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 833 | |
Florian Westphal | cd91566 | 2009-03-18 17:28:37 +0100 | [diff] [blame] | 834 | rcu_read_lock(); |
| 835 | l3proto = __nf_ct_l3proto_find(tuple->src.l3num); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 836 | |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 837 | if (likely(l3proto->nlattr_to_tuple)) { |
| 838 | ret = nla_validate_nested(attr, CTA_IP_MAX, |
| 839 | l3proto->nla_policy); |
| 840 | if (ret == 0) |
| 841 | ret = l3proto->nlattr_to_tuple(tb, tuple); |
| 842 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 843 | |
Florian Westphal | cd91566 | 2009-03-18 17:28:37 +0100 | [diff] [blame] | 844 | rcu_read_unlock(); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 845 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 846 | return ret; |
| 847 | } |
| 848 | |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 849 | static const struct nla_policy proto_nla_policy[CTA_PROTO_MAX+1] = { |
| 850 | [CTA_PROTO_NUM] = { .type = NLA_U8 }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 851 | }; |
| 852 | |
| 853 | static inline int |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 854 | ctnetlink_parse_tuple_proto(struct nlattr *attr, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 855 | struct nf_conntrack_tuple *tuple) |
| 856 | { |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 857 | struct nlattr *tb[CTA_PROTO_MAX+1]; |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 858 | struct nf_conntrack_l4proto *l4proto; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 859 | int ret = 0; |
| 860 | |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 861 | ret = nla_parse_nested(tb, CTA_PROTO_MAX, attr, proto_nla_policy); |
| 862 | if (ret < 0) |
| 863 | return ret; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 864 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 865 | if (!tb[CTA_PROTO_NUM]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 866 | return -EINVAL; |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 867 | tuple->dst.protonum = nla_get_u8(tb[CTA_PROTO_NUM]); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 868 | |
Florian Westphal | cd91566 | 2009-03-18 17:28:37 +0100 | [diff] [blame] | 869 | rcu_read_lock(); |
| 870 | l4proto = __nf_ct_l4proto_find(tuple->src.l3num, tuple->dst.protonum); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 871 | |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 872 | if (likely(l4proto->nlattr_to_tuple)) { |
| 873 | ret = nla_validate_nested(attr, CTA_PROTO_MAX, |
| 874 | l4proto->nla_policy); |
| 875 | if (ret == 0) |
| 876 | ret = l4proto->nlattr_to_tuple(tb, tuple); |
| 877 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 878 | |
Florian Westphal | cd91566 | 2009-03-18 17:28:37 +0100 | [diff] [blame] | 879 | rcu_read_unlock(); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 880 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 881 | return ret; |
| 882 | } |
| 883 | |
Patrick McHardy | d0b0268 | 2010-02-10 15:38:33 +0100 | [diff] [blame] | 884 | static const struct nla_policy tuple_nla_policy[CTA_TUPLE_MAX+1] = { |
| 885 | [CTA_TUPLE_IP] = { .type = NLA_NESTED }, |
| 886 | [CTA_TUPLE_PROTO] = { .type = NLA_NESTED }, |
| 887 | }; |
| 888 | |
Ilpo Järvinen | bb5cf80 | 2008-01-05 23:11:31 -0800 | [diff] [blame] | 889 | static int |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 890 | ctnetlink_parse_tuple(const struct nlattr * const cda[], |
| 891 | struct nf_conntrack_tuple *tuple, |
Patrick McHardy | a00f1f3 | 2011-02-01 17:26:37 +0100 | [diff] [blame] | 892 | enum ctattr_type type, u_int8_t l3num) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 893 | { |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 894 | struct nlattr *tb[CTA_TUPLE_MAX+1]; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 895 | int err; |
| 896 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 897 | memset(tuple, 0, sizeof(*tuple)); |
| 898 | |
Daniel Borkmann | 130ffbc | 2013-06-12 17:54:51 +0200 | [diff] [blame] | 899 | err = nla_parse_nested(tb, CTA_TUPLE_MAX, cda[type], tuple_nla_policy); |
| 900 | if (err < 0) |
| 901 | return err; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 902 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 903 | if (!tb[CTA_TUPLE_IP]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 904 | return -EINVAL; |
| 905 | |
| 906 | tuple->src.l3num = l3num; |
| 907 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 908 | err = ctnetlink_parse_tuple_ip(tb[CTA_TUPLE_IP], tuple); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 909 | if (err < 0) |
| 910 | return err; |
| 911 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 912 | if (!tb[CTA_TUPLE_PROTO]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 913 | return -EINVAL; |
| 914 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 915 | err = ctnetlink_parse_tuple_proto(tb[CTA_TUPLE_PROTO], tuple); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 916 | if (err < 0) |
| 917 | return err; |
| 918 | |
| 919 | /* orig and expect tuples get DIR_ORIGINAL */ |
| 920 | if (type == CTA_TUPLE_REPLY) |
| 921 | tuple->dst.dir = IP_CT_DIR_REPLY; |
| 922 | else |
| 923 | tuple->dst.dir = IP_CT_DIR_ORIGINAL; |
| 924 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 925 | return 0; |
| 926 | } |
| 927 | |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 928 | static int |
| 929 | ctnetlink_parse_zone(const struct nlattr *attr, u16 *zone) |
| 930 | { |
| 931 | if (attr) |
| 932 | #ifdef CONFIG_NF_CONNTRACK_ZONES |
| 933 | *zone = ntohs(nla_get_be16(attr)); |
| 934 | #else |
| 935 | return -EOPNOTSUPP; |
| 936 | #endif |
| 937 | else |
| 938 | *zone = 0; |
| 939 | |
| 940 | return 0; |
| 941 | } |
| 942 | |
Patrick McHardy | d0b0268 | 2010-02-10 15:38:33 +0100 | [diff] [blame] | 943 | static const struct nla_policy help_nla_policy[CTA_HELP_MAX+1] = { |
Florian Westphal | 6d1fafc | 2012-11-22 01:32:46 +0000 | [diff] [blame] | 944 | [CTA_HELP_NAME] = { .type = NLA_NUL_STRING, |
| 945 | .len = NF_CT_HELPER_NAME_LEN - 1 }, |
Patrick McHardy | d0b0268 | 2010-02-10 15:38:33 +0100 | [diff] [blame] | 946 | }; |
| 947 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 948 | static inline int |
Pablo Neira Ayuso | ae243be | 2012-06-07 14:19:42 +0200 | [diff] [blame] | 949 | ctnetlink_parse_help(const struct nlattr *attr, char **helper_name, |
| 950 | struct nlattr **helpinfo) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 951 | { |
Daniel Borkmann | 130ffbc | 2013-06-12 17:54:51 +0200 | [diff] [blame] | 952 | int err; |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 953 | struct nlattr *tb[CTA_HELP_MAX+1]; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 954 | |
Daniel Borkmann | 130ffbc | 2013-06-12 17:54:51 +0200 | [diff] [blame] | 955 | err = nla_parse_nested(tb, CTA_HELP_MAX, attr, help_nla_policy); |
| 956 | if (err < 0) |
| 957 | return err; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 958 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 959 | if (!tb[CTA_HELP_NAME]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 960 | return -EINVAL; |
| 961 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 962 | *helper_name = nla_data(tb[CTA_HELP_NAME]); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 963 | |
Pablo Neira Ayuso | ae243be | 2012-06-07 14:19:42 +0200 | [diff] [blame] | 964 | if (tb[CTA_HELP_INFO]) |
| 965 | *helpinfo = tb[CTA_HELP_INFO]; |
| 966 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 967 | return 0; |
| 968 | } |
| 969 | |
Florian Westphal | 9b21f6a | 2013-01-11 06:30:46 +0000 | [diff] [blame] | 970 | #define __CTA_LABELS_MAX_LENGTH ((XT_CONNLABEL_MAXBIT + 1) / BITS_PER_BYTE) |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 971 | static const struct nla_policy ct_nla_policy[CTA_MAX+1] = { |
Patrick McHardy | d0b0268 | 2010-02-10 15:38:33 +0100 | [diff] [blame] | 972 | [CTA_TUPLE_ORIG] = { .type = NLA_NESTED }, |
| 973 | [CTA_TUPLE_REPLY] = { .type = NLA_NESTED }, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 974 | [CTA_STATUS] = { .type = NLA_U32 }, |
Patrick McHardy | d0b0268 | 2010-02-10 15:38:33 +0100 | [diff] [blame] | 975 | [CTA_PROTOINFO] = { .type = NLA_NESTED }, |
| 976 | [CTA_HELP] = { .type = NLA_NESTED }, |
| 977 | [CTA_NAT_SRC] = { .type = NLA_NESTED }, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 978 | [CTA_TIMEOUT] = { .type = NLA_U32 }, |
| 979 | [CTA_MARK] = { .type = NLA_U32 }, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 980 | [CTA_ID] = { .type = NLA_U32 }, |
Patrick McHardy | d0b0268 | 2010-02-10 15:38:33 +0100 | [diff] [blame] | 981 | [CTA_NAT_DST] = { .type = NLA_NESTED }, |
| 982 | [CTA_TUPLE_MASTER] = { .type = NLA_NESTED }, |
Florian Westphal | 6d1fafc | 2012-11-22 01:32:46 +0000 | [diff] [blame] | 983 | [CTA_NAT_SEQ_ADJ_ORIG] = { .type = NLA_NESTED }, |
| 984 | [CTA_NAT_SEQ_ADJ_REPLY] = { .type = NLA_NESTED }, |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 985 | [CTA_ZONE] = { .type = NLA_U16 }, |
Pablo Neira Ayuso | 0f298a2 | 2012-02-24 14:41:50 +0000 | [diff] [blame] | 986 | [CTA_MARK_MASK] = { .type = NLA_U32 }, |
Florian Westphal | 9b21f6a | 2013-01-11 06:30:46 +0000 | [diff] [blame] | 987 | [CTA_LABELS] = { .type = NLA_BINARY, |
| 988 | .len = __CTA_LABELS_MAX_LENGTH }, |
| 989 | [CTA_LABELS_MASK] = { .type = NLA_BINARY, |
| 990 | .len = __CTA_LABELS_MAX_LENGTH }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 991 | }; |
| 992 | |
| 993 | static int |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 994 | ctnetlink_del_conntrack(struct sock *ctnl, struct sk_buff *skb, |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 995 | const struct nlmsghdr *nlh, |
| 996 | const struct nlattr * const cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 997 | { |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 998 | struct net *net = sock_net(ctnl); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 999 | struct nf_conntrack_tuple_hash *h; |
| 1000 | struct nf_conntrack_tuple tuple; |
| 1001 | struct nf_conn *ct; |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 1002 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1003 | u_int8_t u3 = nfmsg->nfgen_family; |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 1004 | u16 zone; |
| 1005 | int err; |
| 1006 | |
| 1007 | err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone); |
| 1008 | if (err < 0) |
| 1009 | return err; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1010 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1011 | if (cda[CTA_TUPLE_ORIG]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1012 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, u3); |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1013 | else if (cda[CTA_TUPLE_REPLY]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1014 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, u3); |
| 1015 | else { |
| 1016 | /* Flush the whole table */ |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 1017 | nf_conntrack_flush_report(net, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1018 | NETLINK_CB(skb).portid, |
Pablo Neira Ayuso | 274d383 | 2009-06-02 20:08:38 +0200 | [diff] [blame] | 1019 | nlmsg_report(nlh)); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1020 | return 0; |
| 1021 | } |
| 1022 | |
| 1023 | if (err < 0) |
| 1024 | return err; |
| 1025 | |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 1026 | h = nf_conntrack_find_get(net, zone, &tuple); |
Pablo Neira Ayuso | 9ea8cfd | 2006-10-12 14:09:16 -0700 | [diff] [blame] | 1027 | if (!h) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1028 | return -ENOENT; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1029 | |
| 1030 | ct = nf_ct_tuplehash_to_ctrack(h); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1031 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1032 | if (cda[CTA_ID]) { |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 1033 | u_int32_t id = ntohl(nla_get_be32(cda[CTA_ID])); |
Patrick McHardy | 7f85f91 | 2007-09-28 14:41:27 -0700 | [diff] [blame] | 1034 | if (id != (u32)(unsigned long)ct) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1035 | nf_ct_put(ct); |
| 1036 | return -ENOENT; |
| 1037 | } |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1038 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1039 | |
Florian Westphal | 02982c2 | 2013-07-29 15:41:54 +0200 | [diff] [blame] | 1040 | if (del_timer(&ct->timeout)) |
| 1041 | nf_ct_delete(ct, NETLINK_CB(skb).portid, nlmsg_report(nlh)); |
| 1042 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1043 | nf_ct_put(ct); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1044 | |
| 1045 | return 0; |
| 1046 | } |
| 1047 | |
| 1048 | static int |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1049 | ctnetlink_get_conntrack(struct sock *ctnl, struct sk_buff *skb, |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 1050 | const struct nlmsghdr *nlh, |
| 1051 | const struct nlattr * const cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1052 | { |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 1053 | struct net *net = sock_net(ctnl); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1054 | struct nf_conntrack_tuple_hash *h; |
| 1055 | struct nf_conntrack_tuple tuple; |
| 1056 | struct nf_conn *ct; |
| 1057 | struct sk_buff *skb2 = NULL; |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 1058 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1059 | u_int8_t u3 = nfmsg->nfgen_family; |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 1060 | u16 zone; |
| 1061 | int err; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1062 | |
Pablo Neira Ayuso | 80d326f | 2012-02-24 14:30:15 +0000 | [diff] [blame] | 1063 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
| 1064 | struct netlink_dump_control c = { |
| 1065 | .dump = ctnetlink_dump_table, |
| 1066 | .done = ctnetlink_done, |
| 1067 | }; |
Pablo Neira Ayuso | 0f298a2 | 2012-02-24 14:41:50 +0000 | [diff] [blame] | 1068 | #ifdef CONFIG_NF_CONNTRACK_MARK |
| 1069 | if (cda[CTA_MARK] && cda[CTA_MARK_MASK]) { |
| 1070 | struct ctnetlink_dump_filter *filter; |
| 1071 | |
| 1072 | filter = kzalloc(sizeof(struct ctnetlink_dump_filter), |
| 1073 | GFP_ATOMIC); |
| 1074 | if (filter == NULL) |
| 1075 | return -ENOMEM; |
| 1076 | |
| 1077 | filter->mark.val = ntohl(nla_get_be32(cda[CTA_MARK])); |
| 1078 | filter->mark.mask = |
| 1079 | ntohl(nla_get_be32(cda[CTA_MARK_MASK])); |
| 1080 | c.data = filter; |
| 1081 | } |
| 1082 | #endif |
Pablo Neira Ayuso | 80d326f | 2012-02-24 14:30:15 +0000 | [diff] [blame] | 1083 | return netlink_dump_start(ctnl, skb, nlh, &c); |
| 1084 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1085 | |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 1086 | err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone); |
| 1087 | if (err < 0) |
| 1088 | return err; |
| 1089 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1090 | if (cda[CTA_TUPLE_ORIG]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1091 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, u3); |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1092 | else if (cda[CTA_TUPLE_REPLY]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1093 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, u3); |
| 1094 | else |
| 1095 | return -EINVAL; |
| 1096 | |
| 1097 | if (err < 0) |
| 1098 | return err; |
| 1099 | |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 1100 | h = nf_conntrack_find_get(net, zone, &tuple); |
Pablo Neira Ayuso | 9ea8cfd | 2006-10-12 14:09:16 -0700 | [diff] [blame] | 1101 | if (!h) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1102 | return -ENOENT; |
Pablo Neira Ayuso | 9ea8cfd | 2006-10-12 14:09:16 -0700 | [diff] [blame] | 1103 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1104 | ct = nf_ct_tuplehash_to_ctrack(h); |
| 1105 | |
| 1106 | err = -ENOMEM; |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 1107 | skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
| 1108 | if (skb2 == NULL) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1109 | nf_ct_put(ct); |
| 1110 | return -ENOMEM; |
| 1111 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1112 | |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 1113 | rcu_read_lock(); |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1114 | 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] | 1115 | NFNL_MSG_TYPE(nlh->nlmsg_type), ct); |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 1116 | rcu_read_unlock(); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1117 | nf_ct_put(ct); |
| 1118 | if (err <= 0) |
| 1119 | goto free; |
| 1120 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1121 | err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).portid, MSG_DONTWAIT); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1122 | if (err < 0) |
| 1123 | goto out; |
| 1124 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1125 | return 0; |
| 1126 | |
| 1127 | free: |
| 1128 | kfree_skb(skb2); |
| 1129 | out: |
Pablo Neira Ayuso | f31e8d49 | 2011-01-13 14:19:55 +0100 | [diff] [blame] | 1130 | /* this avoids a loop in nfnetlink. */ |
| 1131 | return err == -EAGAIN ? -ENOBUFS : err; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1132 | } |
| 1133 | |
Pablo Neira Ayuso | d871bef | 2012-11-27 14:49:42 +0100 | [diff] [blame] | 1134 | static int ctnetlink_done_list(struct netlink_callback *cb) |
| 1135 | { |
| 1136 | if (cb->args[1]) |
| 1137 | nf_ct_put((struct nf_conn *)cb->args[1]); |
| 1138 | return 0; |
| 1139 | } |
| 1140 | |
| 1141 | static int |
| 1142 | ctnetlink_dump_list(struct sk_buff *skb, struct netlink_callback *cb, |
| 1143 | struct hlist_nulls_head *list) |
| 1144 | { |
| 1145 | struct nf_conn *ct, *last; |
| 1146 | struct nf_conntrack_tuple_hash *h; |
| 1147 | struct hlist_nulls_node *n; |
| 1148 | struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh); |
| 1149 | u_int8_t l3proto = nfmsg->nfgen_family; |
| 1150 | int res; |
| 1151 | |
| 1152 | if (cb->args[2]) |
| 1153 | return 0; |
| 1154 | |
| 1155 | spin_lock_bh(&nf_conntrack_lock); |
| 1156 | last = (struct nf_conn *)cb->args[1]; |
| 1157 | restart: |
| 1158 | hlist_nulls_for_each_entry(h, n, list, hnnode) { |
| 1159 | ct = nf_ct_tuplehash_to_ctrack(h); |
| 1160 | if (l3proto && nf_ct_l3num(ct) != l3proto) |
| 1161 | continue; |
| 1162 | if (cb->args[1]) { |
| 1163 | if (ct != last) |
| 1164 | continue; |
| 1165 | cb->args[1] = 0; |
| 1166 | } |
| 1167 | rcu_read_lock(); |
| 1168 | res = ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).portid, |
| 1169 | cb->nlh->nlmsg_seq, |
| 1170 | NFNL_MSG_TYPE(cb->nlh->nlmsg_type), |
| 1171 | ct); |
| 1172 | rcu_read_unlock(); |
| 1173 | if (res < 0) { |
| 1174 | nf_conntrack_get(&ct->ct_general); |
| 1175 | cb->args[1] = (unsigned long)ct; |
| 1176 | goto out; |
| 1177 | } |
| 1178 | } |
| 1179 | if (cb->args[1]) { |
| 1180 | cb->args[1] = 0; |
| 1181 | goto restart; |
| 1182 | } else |
| 1183 | cb->args[2] = 1; |
| 1184 | out: |
| 1185 | spin_unlock_bh(&nf_conntrack_lock); |
| 1186 | if (last) |
| 1187 | nf_ct_put(last); |
| 1188 | |
| 1189 | return skb->len; |
| 1190 | } |
| 1191 | |
| 1192 | static int |
| 1193 | ctnetlink_dump_dying(struct sk_buff *skb, struct netlink_callback *cb) |
| 1194 | { |
| 1195 | struct net *net = sock_net(skb->sk); |
| 1196 | |
| 1197 | return ctnetlink_dump_list(skb, cb, &net->ct.dying); |
| 1198 | } |
| 1199 | |
| 1200 | static int |
| 1201 | ctnetlink_get_ct_dying(struct sock *ctnl, struct sk_buff *skb, |
| 1202 | const struct nlmsghdr *nlh, |
| 1203 | const struct nlattr * const cda[]) |
| 1204 | { |
| 1205 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
| 1206 | struct netlink_dump_control c = { |
| 1207 | .dump = ctnetlink_dump_dying, |
| 1208 | .done = ctnetlink_done_list, |
| 1209 | }; |
| 1210 | return netlink_dump_start(ctnl, skb, nlh, &c); |
| 1211 | } |
| 1212 | |
| 1213 | return -EOPNOTSUPP; |
| 1214 | } |
| 1215 | |
| 1216 | static int |
| 1217 | ctnetlink_dump_unconfirmed(struct sk_buff *skb, struct netlink_callback *cb) |
| 1218 | { |
| 1219 | struct net *net = sock_net(skb->sk); |
| 1220 | |
| 1221 | return ctnetlink_dump_list(skb, cb, &net->ct.unconfirmed); |
| 1222 | } |
| 1223 | |
| 1224 | static int |
| 1225 | ctnetlink_get_ct_unconfirmed(struct sock *ctnl, struct sk_buff *skb, |
| 1226 | const struct nlmsghdr *nlh, |
| 1227 | const struct nlattr * const cda[]) |
| 1228 | { |
| 1229 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
| 1230 | struct netlink_dump_control c = { |
| 1231 | .dump = ctnetlink_dump_unconfirmed, |
| 1232 | .done = ctnetlink_done_list, |
| 1233 | }; |
| 1234 | return netlink_dump_start(ctnl, skb, nlh, &c); |
| 1235 | } |
| 1236 | |
| 1237 | return -EOPNOTSUPP; |
| 1238 | } |
| 1239 | |
Pablo Neira Ayuso | 6767184 | 2008-10-20 03:34:27 -0700 | [diff] [blame] | 1240 | #ifdef CONFIG_NF_NAT_NEEDED |
Ilpo Järvinen | bb5cf80 | 2008-01-05 23:11:31 -0800 | [diff] [blame] | 1241 | static int |
Pablo Neira Ayuso | e6a7d3c | 2008-10-14 11:58:31 -0700 | [diff] [blame] | 1242 | ctnetlink_parse_nat_setup(struct nf_conn *ct, |
| 1243 | enum nf_nat_manip_type manip, |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 1244 | const struct nlattr *attr) |
Pablo Neira Ayuso | e6a7d3c | 2008-10-14 11:58:31 -0700 | [diff] [blame] | 1245 | { |
| 1246 | typeof(nfnetlink_parse_nat_setup_hook) parse_nat_setup; |
Patrick McHardy | c7232c9 | 2012-08-26 19:14:06 +0200 | [diff] [blame] | 1247 | int err; |
Pablo Neira Ayuso | e6a7d3c | 2008-10-14 11:58:31 -0700 | [diff] [blame] | 1248 | |
| 1249 | parse_nat_setup = rcu_dereference(nfnetlink_parse_nat_setup_hook); |
| 1250 | if (!parse_nat_setup) { |
Johannes Berg | 95a5afc | 2008-10-16 15:24:51 -0700 | [diff] [blame] | 1251 | #ifdef CONFIG_MODULES |
Pablo Neira Ayuso | e6a7d3c | 2008-10-14 11:58:31 -0700 | [diff] [blame] | 1252 | rcu_read_unlock(); |
Pablo Neira Ayuso | c14b78e | 2013-02-05 01:50:26 +0100 | [diff] [blame] | 1253 | nfnl_unlock(NFNL_SUBSYS_CTNETLINK); |
Patrick McHardy | c7232c9 | 2012-08-26 19:14:06 +0200 | [diff] [blame] | 1254 | if (request_module("nf-nat") < 0) { |
Pablo Neira Ayuso | c14b78e | 2013-02-05 01:50:26 +0100 | [diff] [blame] | 1255 | nfnl_lock(NFNL_SUBSYS_CTNETLINK); |
Pablo Neira Ayuso | e6a7d3c | 2008-10-14 11:58:31 -0700 | [diff] [blame] | 1256 | rcu_read_lock(); |
| 1257 | return -EOPNOTSUPP; |
| 1258 | } |
Pablo Neira Ayuso | c14b78e | 2013-02-05 01:50:26 +0100 | [diff] [blame] | 1259 | nfnl_lock(NFNL_SUBSYS_CTNETLINK); |
Pablo Neira Ayuso | e6a7d3c | 2008-10-14 11:58:31 -0700 | [diff] [blame] | 1260 | rcu_read_lock(); |
| 1261 | if (nfnetlink_parse_nat_setup_hook) |
| 1262 | return -EAGAIN; |
| 1263 | #endif |
| 1264 | return -EOPNOTSUPP; |
| 1265 | } |
| 1266 | |
Patrick McHardy | c7232c9 | 2012-08-26 19:14:06 +0200 | [diff] [blame] | 1267 | err = parse_nat_setup(ct, manip, attr); |
| 1268 | if (err == -EAGAIN) { |
| 1269 | #ifdef CONFIG_MODULES |
| 1270 | rcu_read_unlock(); |
Pablo Neira Ayuso | c14b78e | 2013-02-05 01:50:26 +0100 | [diff] [blame] | 1271 | nfnl_unlock(NFNL_SUBSYS_CTNETLINK); |
Patrick McHardy | c7232c9 | 2012-08-26 19:14:06 +0200 | [diff] [blame] | 1272 | if (request_module("nf-nat-%u", nf_ct_l3num(ct)) < 0) { |
Pablo Neira Ayuso | c14b78e | 2013-02-05 01:50:26 +0100 | [diff] [blame] | 1273 | nfnl_lock(NFNL_SUBSYS_CTNETLINK); |
Patrick McHardy | c7232c9 | 2012-08-26 19:14:06 +0200 | [diff] [blame] | 1274 | rcu_read_lock(); |
| 1275 | return -EOPNOTSUPP; |
| 1276 | } |
Pablo Neira Ayuso | c14b78e | 2013-02-05 01:50:26 +0100 | [diff] [blame] | 1277 | nfnl_lock(NFNL_SUBSYS_CTNETLINK); |
Patrick McHardy | c7232c9 | 2012-08-26 19:14:06 +0200 | [diff] [blame] | 1278 | rcu_read_lock(); |
| 1279 | #else |
| 1280 | err = -EOPNOTSUPP; |
| 1281 | #endif |
| 1282 | } |
| 1283 | return err; |
Pablo Neira Ayuso | e6a7d3c | 2008-10-14 11:58:31 -0700 | [diff] [blame] | 1284 | } |
Pablo Neira Ayuso | 6767184 | 2008-10-20 03:34:27 -0700 | [diff] [blame] | 1285 | #endif |
Pablo Neira Ayuso | e6a7d3c | 2008-10-14 11:58:31 -0700 | [diff] [blame] | 1286 | |
| 1287 | static int |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 1288 | 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] | 1289 | { |
| 1290 | unsigned long d; |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 1291 | unsigned int status = ntohl(nla_get_be32(cda[CTA_STATUS])); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1292 | d = ct->status ^ status; |
| 1293 | |
| 1294 | if (d & (IPS_EXPECTED|IPS_CONFIRMED|IPS_DYING)) |
| 1295 | /* unchangeable */ |
Pablo Neira Ayuso | 0adf9d6 | 2008-06-09 15:56:20 -0700 | [diff] [blame] | 1296 | return -EBUSY; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1297 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1298 | if (d & IPS_SEEN_REPLY && !(status & IPS_SEEN_REPLY)) |
| 1299 | /* SEEN_REPLY bit can only be set */ |
Pablo Neira Ayuso | 0adf9d6 | 2008-06-09 15:56:20 -0700 | [diff] [blame] | 1300 | return -EBUSY; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1301 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1302 | if (d & IPS_ASSURED && !(status & IPS_ASSURED)) |
| 1303 | /* ASSURED bit can only be set */ |
Pablo Neira Ayuso | 0adf9d6 | 2008-06-09 15:56:20 -0700 | [diff] [blame] | 1304 | return -EBUSY; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1305 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1306 | /* Be careful here, modifying NAT bits can screw up things, |
| 1307 | * 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] | 1308 | * nf_nat_range. */ |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1309 | ct->status |= status & ~(IPS_NAT_DONE_MASK | IPS_NAT_MASK); |
| 1310 | return 0; |
| 1311 | } |
| 1312 | |
Pablo Neira Ayuso | e6a7d3c | 2008-10-14 11:58:31 -0700 | [diff] [blame] | 1313 | static int |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 1314 | 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] | 1315 | { |
| 1316 | #ifdef CONFIG_NF_NAT_NEEDED |
| 1317 | int ret; |
| 1318 | |
| 1319 | if (cda[CTA_NAT_DST]) { |
| 1320 | ret = ctnetlink_parse_nat_setup(ct, |
Patrick McHardy | cbc9f2f | 2011-12-23 13:59:49 +0100 | [diff] [blame] | 1321 | NF_NAT_MANIP_DST, |
Pablo Neira Ayuso | e6a7d3c | 2008-10-14 11:58:31 -0700 | [diff] [blame] | 1322 | cda[CTA_NAT_DST]); |
| 1323 | if (ret < 0) |
| 1324 | return ret; |
| 1325 | } |
| 1326 | if (cda[CTA_NAT_SRC]) { |
| 1327 | ret = ctnetlink_parse_nat_setup(ct, |
Patrick McHardy | cbc9f2f | 2011-12-23 13:59:49 +0100 | [diff] [blame] | 1328 | NF_NAT_MANIP_SRC, |
Pablo Neira Ayuso | e6a7d3c | 2008-10-14 11:58:31 -0700 | [diff] [blame] | 1329 | cda[CTA_NAT_SRC]); |
| 1330 | if (ret < 0) |
| 1331 | return ret; |
| 1332 | } |
| 1333 | return 0; |
| 1334 | #else |
| 1335 | return -EOPNOTSUPP; |
| 1336 | #endif |
| 1337 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1338 | |
| 1339 | static inline int |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 1340 | 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] | 1341 | { |
| 1342 | struct nf_conntrack_helper *helper; |
Harald Welte | dc808fe | 2006-03-20 17:56:32 -0800 | [diff] [blame] | 1343 | struct nf_conn_help *help = nfct_help(ct); |
Pablo Neira Ayuso | 29fe1b4 | 2009-04-22 02:26:37 -0700 | [diff] [blame] | 1344 | char *helpname = NULL; |
Pablo Neira Ayuso | ae243be | 2012-06-07 14:19:42 +0200 | [diff] [blame] | 1345 | struct nlattr *helpinfo = NULL; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1346 | int err; |
| 1347 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1348 | /* don't change helper of sibling connections */ |
| 1349 | if (ct->master) |
Pablo Neira Ayuso | 0adf9d6 | 2008-06-09 15:56:20 -0700 | [diff] [blame] | 1350 | return -EBUSY; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1351 | |
Pablo Neira Ayuso | ae243be | 2012-06-07 14:19:42 +0200 | [diff] [blame] | 1352 | err = ctnetlink_parse_help(cda[CTA_HELP], &helpname, &helpinfo); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1353 | if (err < 0) |
| 1354 | return err; |
| 1355 | |
Yasuyuki Kozakai | df293bb | 2007-05-10 14:15:58 -0700 | [diff] [blame] | 1356 | if (!strcmp(helpname, "")) { |
| 1357 | if (help && help->helper) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1358 | /* we had a helper before ... */ |
| 1359 | nf_ct_remove_expectations(ct); |
Stephen Hemminger | a9b3cd7 | 2011-08-01 16:19:00 +0000 | [diff] [blame] | 1360 | RCU_INIT_POINTER(help->helper, NULL); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1361 | } |
Yasuyuki Kozakai | df293bb | 2007-05-10 14:15:58 -0700 | [diff] [blame] | 1362 | |
| 1363 | return 0; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1364 | } |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1365 | |
Patrick McHardy | 794e687 | 2010-02-03 13:41:29 +0100 | [diff] [blame] | 1366 | helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct), |
| 1367 | nf_ct_protonum(ct)); |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1368 | if (helper == NULL) { |
| 1369 | #ifdef CONFIG_MODULES |
| 1370 | spin_unlock_bh(&nf_conntrack_lock); |
| 1371 | |
| 1372 | if (request_module("nfct-helper-%s", helpname) < 0) { |
| 1373 | spin_lock_bh(&nf_conntrack_lock); |
| 1374 | return -EOPNOTSUPP; |
| 1375 | } |
| 1376 | |
| 1377 | spin_lock_bh(&nf_conntrack_lock); |
Patrick McHardy | 794e687 | 2010-02-03 13:41:29 +0100 | [diff] [blame] | 1378 | helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct), |
| 1379 | nf_ct_protonum(ct)); |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1380 | if (helper) |
| 1381 | return -EAGAIN; |
| 1382 | #endif |
Pablo Neira Ayuso | 0adf9d6 | 2008-06-09 15:56:20 -0700 | [diff] [blame] | 1383 | return -EOPNOTSUPP; |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1384 | } |
Yasuyuki Kozakai | df293bb | 2007-05-10 14:15:58 -0700 | [diff] [blame] | 1385 | |
Yasuyuki Kozakai | ceceae1 | 2007-07-07 22:23:42 -0700 | [diff] [blame] | 1386 | if (help) { |
Pablo Neira Ayuso | ae243be | 2012-06-07 14:19:42 +0200 | [diff] [blame] | 1387 | if (help->helper == helper) { |
| 1388 | /* update private helper data if allowed. */ |
Pablo Neira Ayuso | 7be54ca | 2012-09-21 16:52:08 +0200 | [diff] [blame] | 1389 | if (helper->from_nlattr) |
Pablo Neira Ayuso | ae243be | 2012-06-07 14:19:42 +0200 | [diff] [blame] | 1390 | helper->from_nlattr(helpinfo, ct); |
Yasuyuki Kozakai | ceceae1 | 2007-07-07 22:23:42 -0700 | [diff] [blame] | 1391 | return 0; |
Pablo Neira Ayuso | fd7462d | 2012-06-18 17:29:53 +0200 | [diff] [blame] | 1392 | } else |
Yasuyuki Kozakai | ceceae1 | 2007-07-07 22:23:42 -0700 | [diff] [blame] | 1393 | return -EBUSY; |
Yasuyuki Kozakai | ceceae1 | 2007-07-07 22:23:42 -0700 | [diff] [blame] | 1394 | } |
Yasuyuki Kozakai | df293bb | 2007-05-10 14:15:58 -0700 | [diff] [blame] | 1395 | |
Pablo Neira Ayuso | fd7462d | 2012-06-18 17:29:53 +0200 | [diff] [blame] | 1396 | /* we cannot set a helper for an existing conntrack */ |
| 1397 | return -EOPNOTSUPP; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1398 | } |
| 1399 | |
| 1400 | static inline int |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 1401 | 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] | 1402 | { |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 1403 | u_int32_t timeout = ntohl(nla_get_be32(cda[CTA_TIMEOUT])); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1404 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1405 | if (!del_timer(&ct->timeout)) |
| 1406 | return -ETIME; |
| 1407 | |
| 1408 | ct->timeout.expires = jiffies + timeout * HZ; |
| 1409 | add_timer(&ct->timeout); |
| 1410 | |
| 1411 | return 0; |
| 1412 | } |
| 1413 | |
Patrick McHardy | d0b0268 | 2010-02-10 15:38:33 +0100 | [diff] [blame] | 1414 | static const struct nla_policy protoinfo_policy[CTA_PROTOINFO_MAX+1] = { |
| 1415 | [CTA_PROTOINFO_TCP] = { .type = NLA_NESTED }, |
| 1416 | [CTA_PROTOINFO_DCCP] = { .type = NLA_NESTED }, |
| 1417 | [CTA_PROTOINFO_SCTP] = { .type = NLA_NESTED }, |
| 1418 | }; |
| 1419 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1420 | static inline int |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 1421 | 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] | 1422 | { |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 1423 | const struct nlattr *attr = cda[CTA_PROTOINFO]; |
| 1424 | struct nlattr *tb[CTA_PROTOINFO_MAX+1]; |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 1425 | struct nf_conntrack_l4proto *l4proto; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1426 | int err = 0; |
| 1427 | |
Daniel Borkmann | 130ffbc | 2013-06-12 17:54:51 +0200 | [diff] [blame] | 1428 | err = nla_parse_nested(tb, CTA_PROTOINFO_MAX, attr, protoinfo_policy); |
| 1429 | if (err < 0) |
| 1430 | return err; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1431 | |
Florian Westphal | cd91566 | 2009-03-18 17:28:37 +0100 | [diff] [blame] | 1432 | rcu_read_lock(); |
| 1433 | 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] | 1434 | if (l4proto->from_nlattr) |
| 1435 | err = l4proto->from_nlattr(tb, ct); |
Florian Westphal | cd91566 | 2009-03-18 17:28:37 +0100 | [diff] [blame] | 1436 | rcu_read_unlock(); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1437 | |
| 1438 | return err; |
| 1439 | } |
| 1440 | |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 1441 | static const struct nla_policy seqadj_policy[CTA_SEQADJ_MAX+1] = { |
| 1442 | [CTA_SEQADJ_CORRECTION_POS] = { .type = NLA_U32 }, |
| 1443 | [CTA_SEQADJ_OFFSET_BEFORE] = { .type = NLA_U32 }, |
| 1444 | [CTA_SEQADJ_OFFSET_AFTER] = { .type = NLA_U32 }, |
Patrick McHardy | d0b0268 | 2010-02-10 15:38:33 +0100 | [diff] [blame] | 1445 | }; |
| 1446 | |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1447 | static inline int |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 1448 | 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] | 1449 | { |
Daniel Borkmann | 130ffbc | 2013-06-12 17:54:51 +0200 | [diff] [blame] | 1450 | int err; |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 1451 | struct nlattr *cda[CTA_SEQADJ_MAX+1]; |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1452 | |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 1453 | err = nla_parse_nested(cda, CTA_SEQADJ_MAX, attr, seqadj_policy); |
Daniel Borkmann | 130ffbc | 2013-06-12 17:54:51 +0200 | [diff] [blame] | 1454 | if (err < 0) |
| 1455 | return err; |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1456 | |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 1457 | if (!cda[CTA_SEQADJ_CORRECTION_POS]) |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1458 | return -EINVAL; |
| 1459 | |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 1460 | seq->correction_pos = |
| 1461 | ntohl(nla_get_be32(cda[CTA_SEQADJ_CORRECTION_POS])); |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1462 | |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 1463 | if (!cda[CTA_SEQADJ_OFFSET_BEFORE]) |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1464 | return -EINVAL; |
| 1465 | |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 1466 | seq->offset_before = |
| 1467 | ntohl(nla_get_be32(cda[CTA_SEQADJ_OFFSET_BEFORE])); |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1468 | |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 1469 | if (!cda[CTA_SEQADJ_OFFSET_AFTER]) |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1470 | return -EINVAL; |
| 1471 | |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 1472 | seq->offset_after = |
| 1473 | ntohl(nla_get_be32(cda[CTA_SEQADJ_OFFSET_AFTER])); |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1474 | |
| 1475 | return 0; |
| 1476 | } |
| 1477 | |
| 1478 | static int |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 1479 | ctnetlink_change_seq_adj(struct nf_conn *ct, |
| 1480 | const struct nlattr * const cda[]) |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1481 | { |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 1482 | struct nf_conn_seqadj *seqadj = nfct_seqadj(ct); |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1483 | int ret = 0; |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1484 | |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 1485 | if (!seqadj) |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1486 | return 0; |
| 1487 | |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 1488 | if (cda[CTA_SEQ_ADJ_ORIG]) { |
| 1489 | ret = change_seq_adj(&seqadj->seq[IP_CT_DIR_ORIGINAL], |
| 1490 | cda[CTA_SEQ_ADJ_ORIG]); |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1491 | if (ret < 0) |
| 1492 | return ret; |
| 1493 | |
| 1494 | ct->status |= IPS_SEQ_ADJUST; |
| 1495 | } |
| 1496 | |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 1497 | if (cda[CTA_SEQ_ADJ_REPLY]) { |
| 1498 | ret = change_seq_adj(&seqadj->seq[IP_CT_DIR_REPLY], |
| 1499 | cda[CTA_SEQ_ADJ_REPLY]); |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1500 | if (ret < 0) |
| 1501 | return ret; |
| 1502 | |
| 1503 | ct->status |= IPS_SEQ_ADJUST; |
| 1504 | } |
| 1505 | |
| 1506 | return 0; |
| 1507 | } |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1508 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1509 | static int |
Florian Westphal | 9b21f6a | 2013-01-11 06:30:46 +0000 | [diff] [blame] | 1510 | ctnetlink_attach_labels(struct nf_conn *ct, const struct nlattr * const cda[]) |
| 1511 | { |
| 1512 | #ifdef CONFIG_NF_CONNTRACK_LABELS |
| 1513 | size_t len = nla_len(cda[CTA_LABELS]); |
| 1514 | const void *mask = cda[CTA_LABELS_MASK]; |
| 1515 | |
| 1516 | if (len & (sizeof(u32)-1)) /* must be multiple of u32 */ |
| 1517 | return -EINVAL; |
| 1518 | |
| 1519 | if (mask) { |
| 1520 | if (nla_len(cda[CTA_LABELS_MASK]) == 0 || |
| 1521 | nla_len(cda[CTA_LABELS_MASK]) != len) |
| 1522 | return -EINVAL; |
| 1523 | mask = nla_data(cda[CTA_LABELS_MASK]); |
| 1524 | } |
| 1525 | |
| 1526 | len /= sizeof(u32); |
| 1527 | |
| 1528 | return nf_connlabels_replace(ct, nla_data(cda[CTA_LABELS]), mask, len); |
| 1529 | #else |
| 1530 | return -EOPNOTSUPP; |
| 1531 | #endif |
| 1532 | } |
| 1533 | |
| 1534 | static int |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 1535 | ctnetlink_change_conntrack(struct nf_conn *ct, |
| 1536 | const struct nlattr * const cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1537 | { |
| 1538 | int err; |
| 1539 | |
Pablo Neira Ayuso | e098360 | 2009-03-16 15:27:22 +0100 | [diff] [blame] | 1540 | /* only allow NAT changes and master assignation for new conntracks */ |
| 1541 | if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST] || cda[CTA_TUPLE_MASTER]) |
| 1542 | return -EOPNOTSUPP; |
| 1543 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1544 | if (cda[CTA_HELP]) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1545 | err = ctnetlink_change_helper(ct, cda); |
| 1546 | if (err < 0) |
| 1547 | return err; |
| 1548 | } |
| 1549 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1550 | if (cda[CTA_TIMEOUT]) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1551 | err = ctnetlink_change_timeout(ct, cda); |
| 1552 | if (err < 0) |
| 1553 | return err; |
| 1554 | } |
| 1555 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1556 | if (cda[CTA_STATUS]) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1557 | err = ctnetlink_change_status(ct, cda); |
| 1558 | if (err < 0) |
| 1559 | return err; |
| 1560 | } |
| 1561 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1562 | if (cda[CTA_PROTOINFO]) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1563 | err = ctnetlink_change_protoinfo(ct, cda); |
| 1564 | if (err < 0) |
| 1565 | return err; |
| 1566 | } |
| 1567 | |
Martin Josefsson | bcd1e83 | 2006-04-01 02:23:21 -0800 | [diff] [blame] | 1568 | #if defined(CONFIG_NF_CONNTRACK_MARK) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1569 | if (cda[CTA_MARK]) |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 1570 | ct->mark = ntohl(nla_get_be32(cda[CTA_MARK])); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1571 | #endif |
| 1572 | |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 1573 | if (cda[CTA_SEQ_ADJ_ORIG] || cda[CTA_SEQ_ADJ_REPLY]) { |
| 1574 | err = ctnetlink_change_seq_adj(ct, cda); |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1575 | if (err < 0) |
| 1576 | return err; |
| 1577 | } |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 1578 | |
Florian Westphal | 9b21f6a | 2013-01-11 06:30:46 +0000 | [diff] [blame] | 1579 | if (cda[CTA_LABELS]) { |
| 1580 | err = ctnetlink_attach_labels(ct, cda); |
| 1581 | if (err < 0) |
| 1582 | return err; |
| 1583 | } |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1584 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1585 | return 0; |
| 1586 | } |
| 1587 | |
Pablo Neira Ayuso | f0a3c08 | 2009-03-16 15:28:09 +0100 | [diff] [blame] | 1588 | static struct nf_conn * |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 1589 | ctnetlink_create_conntrack(struct net *net, u16 zone, |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 1590 | const struct nlattr * const cda[], |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1591 | struct nf_conntrack_tuple *otuple, |
Pablo Neira Ayuso | 5faa1f4 | 2007-09-28 14:43:53 -0700 | [diff] [blame] | 1592 | struct nf_conntrack_tuple *rtuple, |
Pablo Neira Ayuso | 7ec4749 | 2009-03-16 15:25:46 +0100 | [diff] [blame] | 1593 | u8 u3) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1594 | { |
| 1595 | struct nf_conn *ct; |
| 1596 | int err = -EINVAL; |
Yasuyuki Kozakai | ceceae1 | 2007-07-07 22:23:42 -0700 | [diff] [blame] | 1597 | struct nf_conntrack_helper *helper; |
Pablo Neira Ayuso | 315c34d | 2011-04-21 10:55:07 +0200 | [diff] [blame] | 1598 | struct nf_conn_tstamp *tstamp; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1599 | |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 1600 | ct = nf_conntrack_alloc(net, zone, otuple, rtuple, GFP_ATOMIC); |
Julia Lawall | cd7fcbf | 2009-01-12 00:06:08 +0000 | [diff] [blame] | 1601 | if (IS_ERR(ct)) |
Pablo Neira Ayuso | f0a3c08 | 2009-03-16 15:28:09 +0100 | [diff] [blame] | 1602 | return ERR_PTR(-ENOMEM); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1603 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1604 | if (!cda[CTA_TIMEOUT]) |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1605 | goto err1; |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 1606 | ct->timeout.expires = ntohl(nla_get_be32(cda[CTA_TIMEOUT])); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1607 | |
| 1608 | ct->timeout.expires = jiffies + ct->timeout.expires * HZ; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1609 | |
Patrick McHardy | 58a3c9b | 2008-01-31 04:36:54 -0800 | [diff] [blame] | 1610 | rcu_read_lock(); |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1611 | if (cda[CTA_HELP]) { |
Pablo Neira Ayuso | 29fe1b4 | 2009-04-22 02:26:37 -0700 | [diff] [blame] | 1612 | char *helpname = NULL; |
Pablo Neira Ayuso | ae243be | 2012-06-07 14:19:42 +0200 | [diff] [blame] | 1613 | struct nlattr *helpinfo = NULL; |
| 1614 | |
| 1615 | err = ctnetlink_parse_help(cda[CTA_HELP], &helpname, &helpinfo); |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1616 | if (err < 0) |
| 1617 | goto err2; |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1618 | |
Patrick McHardy | 794e687 | 2010-02-03 13:41:29 +0100 | [diff] [blame] | 1619 | helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct), |
| 1620 | nf_ct_protonum(ct)); |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1621 | if (helper == NULL) { |
| 1622 | rcu_read_unlock(); |
| 1623 | #ifdef CONFIG_MODULES |
| 1624 | if (request_module("nfct-helper-%s", helpname) < 0) { |
| 1625 | err = -EOPNOTSUPP; |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1626 | goto err1; |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1627 | } |
| 1628 | |
| 1629 | rcu_read_lock(); |
Patrick McHardy | 794e687 | 2010-02-03 13:41:29 +0100 | [diff] [blame] | 1630 | helper = __nf_conntrack_helper_find(helpname, |
| 1631 | nf_ct_l3num(ct), |
| 1632 | nf_ct_protonum(ct)); |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1633 | if (helper) { |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1634 | err = -EAGAIN; |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1635 | goto err2; |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1636 | } |
| 1637 | rcu_read_unlock(); |
| 1638 | #endif |
| 1639 | err = -EOPNOTSUPP; |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1640 | goto err1; |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1641 | } else { |
| 1642 | struct nf_conn_help *help; |
| 1643 | |
Pablo Neira Ayuso | 1afc567 | 2012-06-07 12:11:50 +0200 | [diff] [blame] | 1644 | help = nf_ct_helper_ext_add(ct, helper, GFP_ATOMIC); |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1645 | if (help == NULL) { |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1646 | err = -ENOMEM; |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1647 | goto err2; |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1648 | } |
Pablo Neira Ayuso | ae243be | 2012-06-07 14:19:42 +0200 | [diff] [blame] | 1649 | /* set private helper data if allowed. */ |
Pablo Neira Ayuso | 7be54ca | 2012-09-21 16:52:08 +0200 | [diff] [blame] | 1650 | if (helper->from_nlattr) |
Pablo Neira Ayuso | ae243be | 2012-06-07 14:19:42 +0200 | [diff] [blame] | 1651 | helper->from_nlattr(helpinfo, ct); |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1652 | |
| 1653 | /* not in hash table yet so not strictly necessary */ |
Stephen Hemminger | a9b3cd7 | 2011-08-01 16:19:00 +0000 | [diff] [blame] | 1654 | RCU_INIT_POINTER(help->helper, helper); |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1655 | } |
| 1656 | } else { |
| 1657 | /* try an implicit helper assignation */ |
Patrick McHardy | b2a15a6 | 2010-02-03 14:13:03 +0100 | [diff] [blame] | 1658 | err = __nf_ct_try_assign_helper(ct, NULL, GFP_ATOMIC); |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1659 | if (err < 0) |
| 1660 | goto err2; |
Patrick McHarrdy | 3c158f7 | 2007-06-05 12:55:27 -0700 | [diff] [blame] | 1661 | } |
Yasuyuki Kozakai | dafc741 | 2006-11-27 10:25:32 -0800 | [diff] [blame] | 1662 | |
Pablo Neira Ayuso | a88e22a | 2010-02-19 14:24:39 +0100 | [diff] [blame] | 1663 | if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST]) { |
| 1664 | err = ctnetlink_change_nat(ct, cda); |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1665 | if (err < 0) |
| 1666 | goto err2; |
Pablo Neira Ayuso | 1575e7e | 2008-08-18 21:30:55 -0700 | [diff] [blame] | 1667 | } |
| 1668 | |
Pablo Neira Ayuso | a88e22a | 2010-02-19 14:24:39 +0100 | [diff] [blame] | 1669 | nf_ct_acct_ext_add(ct, GFP_ATOMIC); |
Pablo Neira Ayuso | a992ca2 | 2011-01-19 16:00:07 +0100 | [diff] [blame] | 1670 | nf_ct_tstamp_ext_add(ct, GFP_ATOMIC); |
Pablo Neira Ayuso | a88e22a | 2010-02-19 14:24:39 +0100 | [diff] [blame] | 1671 | nf_ct_ecache_ext_add(ct, 0, 0, GFP_ATOMIC); |
Florian Westphal | c539f01 | 2013-01-11 06:30:44 +0000 | [diff] [blame] | 1672 | nf_ct_labels_ext_add(ct); |
| 1673 | |
Pablo Neira Ayuso | a88e22a | 2010-02-19 14:24:39 +0100 | [diff] [blame] | 1674 | /* we must add conntrack extensions before confirmation. */ |
| 1675 | ct->status |= IPS_CONFIRMED; |
| 1676 | |
| 1677 | if (cda[CTA_STATUS]) { |
| 1678 | err = ctnetlink_change_status(ct, cda); |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1679 | if (err < 0) |
| 1680 | goto err2; |
Pablo Neira Ayuso | e6a7d3c | 2008-10-14 11:58:31 -0700 | [diff] [blame] | 1681 | } |
| 1682 | |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 1683 | if (cda[CTA_SEQ_ADJ_ORIG] || cda[CTA_SEQ_ADJ_REPLY]) { |
| 1684 | err = ctnetlink_change_seq_adj(ct, cda); |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1685 | if (err < 0) |
| 1686 | goto err2; |
Pablo Neira Ayuso | c969aa7 | 2009-02-09 14:33:57 -0800 | [diff] [blame] | 1687 | } |
Pablo Neira Ayuso | c969aa7 | 2009-02-09 14:33:57 -0800 | [diff] [blame] | 1688 | |
Changli Gao | e5fc9e7 | 2010-11-12 17:33:17 +0100 | [diff] [blame] | 1689 | memset(&ct->proto, 0, sizeof(ct->proto)); |
Pablo Neira Ayuso | 1575e7e | 2008-08-18 21:30:55 -0700 | [diff] [blame] | 1690 | if (cda[CTA_PROTOINFO]) { |
| 1691 | err = ctnetlink_change_protoinfo(ct, cda); |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1692 | if (err < 0) |
| 1693 | goto err2; |
Pablo Neira Ayuso | 1575e7e | 2008-08-18 21:30:55 -0700 | [diff] [blame] | 1694 | } |
| 1695 | |
Pablo Neira Ayuso | 1575e7e | 2008-08-18 21:30:55 -0700 | [diff] [blame] | 1696 | #if defined(CONFIG_NF_CONNTRACK_MARK) |
| 1697 | if (cda[CTA_MARK]) |
| 1698 | ct->mark = ntohl(nla_get_be32(cda[CTA_MARK])); |
| 1699 | #endif |
| 1700 | |
Pablo Neira Ayuso | 5faa1f4 | 2007-09-28 14:43:53 -0700 | [diff] [blame] | 1701 | /* setup master conntrack: this is a confirmed expectation */ |
Pablo Neira Ayuso | 7ec4749 | 2009-03-16 15:25:46 +0100 | [diff] [blame] | 1702 | if (cda[CTA_TUPLE_MASTER]) { |
| 1703 | struct nf_conntrack_tuple master; |
| 1704 | struct nf_conntrack_tuple_hash *master_h; |
| 1705 | struct nf_conn *master_ct; |
| 1706 | |
| 1707 | err = ctnetlink_parse_tuple(cda, &master, CTA_TUPLE_MASTER, u3); |
| 1708 | if (err < 0) |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1709 | goto err2; |
Pablo Neira Ayuso | 7ec4749 | 2009-03-16 15:25:46 +0100 | [diff] [blame] | 1710 | |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 1711 | master_h = nf_conntrack_find_get(net, zone, &master); |
Pablo Neira Ayuso | 7ec4749 | 2009-03-16 15:25:46 +0100 | [diff] [blame] | 1712 | if (master_h == NULL) { |
| 1713 | err = -ENOENT; |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1714 | goto err2; |
Pablo Neira Ayuso | 7ec4749 | 2009-03-16 15:25:46 +0100 | [diff] [blame] | 1715 | } |
| 1716 | master_ct = nf_ct_tuplehash_to_ctrack(master_h); |
Pablo Neira Ayuso | f2a8900 | 2007-12-12 10:34:29 -0800 | [diff] [blame] | 1717 | __set_bit(IPS_EXPECTED_BIT, &ct->status); |
Pablo Neira Ayuso | 5faa1f4 | 2007-09-28 14:43:53 -0700 | [diff] [blame] | 1718 | ct->master = master_ct; |
Pablo Neira Ayuso | f2a8900 | 2007-12-12 10:34:29 -0800 | [diff] [blame] | 1719 | } |
Pablo Neira Ayuso | 315c34d | 2011-04-21 10:55:07 +0200 | [diff] [blame] | 1720 | tstamp = nf_conn_tstamp_find(ct); |
| 1721 | if (tstamp) |
| 1722 | tstamp->start = ktime_to_ns(ktime_get_real()); |
Pablo Neira Ayuso | 5faa1f4 | 2007-09-28 14:43:53 -0700 | [diff] [blame] | 1723 | |
Jozsef Kadlecsik | 7d367e0 | 2012-02-24 11:45:49 +0100 | [diff] [blame] | 1724 | err = nf_conntrack_hash_check_insert(ct); |
| 1725 | if (err < 0) |
| 1726 | goto err2; |
| 1727 | |
Patrick McHardy | 58a3c9b | 2008-01-31 04:36:54 -0800 | [diff] [blame] | 1728 | rcu_read_unlock(); |
Yasuyuki Kozakai | dafc741 | 2006-11-27 10:25:32 -0800 | [diff] [blame] | 1729 | |
Pablo Neira Ayuso | f0a3c08 | 2009-03-16 15:28:09 +0100 | [diff] [blame] | 1730 | return ct; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1731 | |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1732 | err2: |
| 1733 | rcu_read_unlock(); |
| 1734 | err1: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1735 | nf_conntrack_free(ct); |
Pablo Neira Ayuso | f0a3c08 | 2009-03-16 15:28:09 +0100 | [diff] [blame] | 1736 | return ERR_PTR(err); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1737 | } |
| 1738 | |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1739 | static int |
| 1740 | ctnetlink_new_conntrack(struct sock *ctnl, struct sk_buff *skb, |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 1741 | const struct nlmsghdr *nlh, |
| 1742 | const struct nlattr * const cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1743 | { |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 1744 | struct net *net = sock_net(ctnl); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1745 | struct nf_conntrack_tuple otuple, rtuple; |
| 1746 | struct nf_conntrack_tuple_hash *h = NULL; |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 1747 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
Jozsef Kadlecsik | 7d367e0 | 2012-02-24 11:45:49 +0100 | [diff] [blame] | 1748 | struct nf_conn *ct; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1749 | u_int8_t u3 = nfmsg->nfgen_family; |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 1750 | u16 zone; |
| 1751 | int err; |
| 1752 | |
| 1753 | err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone); |
| 1754 | if (err < 0) |
| 1755 | return err; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1756 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1757 | if (cda[CTA_TUPLE_ORIG]) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1758 | err = ctnetlink_parse_tuple(cda, &otuple, CTA_TUPLE_ORIG, u3); |
| 1759 | if (err < 0) |
| 1760 | return err; |
| 1761 | } |
| 1762 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1763 | if (cda[CTA_TUPLE_REPLY]) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1764 | err = ctnetlink_parse_tuple(cda, &rtuple, CTA_TUPLE_REPLY, u3); |
| 1765 | if (err < 0) |
| 1766 | return err; |
| 1767 | } |
| 1768 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1769 | if (cda[CTA_TUPLE_ORIG]) |
Jozsef Kadlecsik | 7d367e0 | 2012-02-24 11:45:49 +0100 | [diff] [blame] | 1770 | h = nf_conntrack_find_get(net, zone, &otuple); |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1771 | else if (cda[CTA_TUPLE_REPLY]) |
Jozsef Kadlecsik | 7d367e0 | 2012-02-24 11:45:49 +0100 | [diff] [blame] | 1772 | h = nf_conntrack_find_get(net, zone, &rtuple); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1773 | |
| 1774 | if (h == NULL) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1775 | err = -ENOENT; |
Pablo Neira Ayuso | f0a3c08 | 2009-03-16 15:28:09 +0100 | [diff] [blame] | 1776 | if (nlh->nlmsg_flags & NLM_F_CREATE) { |
Pablo Neira Ayuso | fecc113 | 2009-05-05 17:48:26 +0200 | [diff] [blame] | 1777 | enum ip_conntrack_events events; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1778 | |
Florian Westphal | 442fad9 | 2013-02-11 23:22:38 +0000 | [diff] [blame] | 1779 | if (!cda[CTA_TUPLE_ORIG] || !cda[CTA_TUPLE_REPLY]) |
| 1780 | return -EINVAL; |
| 1781 | |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 1782 | ct = ctnetlink_create_conntrack(net, zone, cda, &otuple, |
Pablo Neira Ayuso | f0a3c08 | 2009-03-16 15:28:09 +0100 | [diff] [blame] | 1783 | &rtuple, u3); |
Jozsef Kadlecsik | 7d367e0 | 2012-02-24 11:45:49 +0100 | [diff] [blame] | 1784 | if (IS_ERR(ct)) |
| 1785 | return PTR_ERR(ct); |
| 1786 | |
Pablo Neira Ayuso | f0a3c08 | 2009-03-16 15:28:09 +0100 | [diff] [blame] | 1787 | err = 0; |
Pablo Neira Ayuso | fecc113 | 2009-05-05 17:48:26 +0200 | [diff] [blame] | 1788 | if (test_bit(IPS_EXPECTED_BIT, &ct->status)) |
| 1789 | events = IPCT_RELATED; |
| 1790 | else |
| 1791 | events = IPCT_NEW; |
| 1792 | |
Florian Westphal | 9b21f6a | 2013-01-11 06:30:46 +0000 | [diff] [blame] | 1793 | if (cda[CTA_LABELS] && |
| 1794 | ctnetlink_attach_labels(ct, cda) == 0) |
| 1795 | events |= (1 << IPCT_LABEL); |
| 1796 | |
Patrick McHardy | 858b3133 | 2010-02-03 13:48:53 +0100 | [diff] [blame] | 1797 | nf_conntrack_eventmask_report((1 << IPCT_REPLY) | |
| 1798 | (1 << IPCT_ASSURED) | |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 1799 | (1 << IPCT_HELPER) | |
| 1800 | (1 << IPCT_PROTOINFO) | |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 1801 | (1 << IPCT_SEQADJ) | |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 1802 | (1 << IPCT_MARK) | events, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1803 | ct, NETLINK_CB(skb).portid, |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 1804 | nlmsg_report(nlh)); |
Pablo Neira Ayuso | f0a3c08 | 2009-03-16 15:28:09 +0100 | [diff] [blame] | 1805 | nf_ct_put(ct); |
Jozsef Kadlecsik | 7d367e0 | 2012-02-24 11:45:49 +0100 | [diff] [blame] | 1806 | } |
Pablo Neira Ayuso | 5faa1f4 | 2007-09-28 14:43:53 -0700 | [diff] [blame] | 1807 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1808 | return err; |
| 1809 | } |
| 1810 | /* implicit 'else' */ |
| 1811 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1812 | err = -EEXIST; |
Jozsef Kadlecsik | 7d367e0 | 2012-02-24 11:45:49 +0100 | [diff] [blame] | 1813 | ct = nf_ct_tuplehash_to_ctrack(h); |
Pablo Neira Ayuso | ff4ca82 | 2007-08-07 18:11:26 -0700 | [diff] [blame] | 1814 | if (!(nlh->nlmsg_flags & NLM_F_EXCL)) { |
Jozsef Kadlecsik | 7d367e0 | 2012-02-24 11:45:49 +0100 | [diff] [blame] | 1815 | spin_lock_bh(&nf_conntrack_lock); |
Pablo Neira Ayuso | 19abb7b | 2008-11-18 11:56:20 +0100 | [diff] [blame] | 1816 | err = ctnetlink_change_conntrack(ct, cda); |
Jozsef Kadlecsik | 7d367e0 | 2012-02-24 11:45:49 +0100 | [diff] [blame] | 1817 | spin_unlock_bh(&nf_conntrack_lock); |
Pablo Neira Ayuso | 19abb7b | 2008-11-18 11:56:20 +0100 | [diff] [blame] | 1818 | if (err == 0) { |
Patrick McHardy | 858b3133 | 2010-02-03 13:48:53 +0100 | [diff] [blame] | 1819 | nf_conntrack_eventmask_report((1 << IPCT_REPLY) | |
| 1820 | (1 << IPCT_ASSURED) | |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 1821 | (1 << IPCT_HELPER) | |
Florian Westphal | 797a7d6 | 2013-06-21 16:51:30 +0200 | [diff] [blame] | 1822 | (1 << IPCT_LABEL) | |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 1823 | (1 << IPCT_PROTOINFO) | |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 1824 | (1 << IPCT_SEQADJ) | |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 1825 | (1 << IPCT_MARK), |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1826 | ct, NETLINK_CB(skb).portid, |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 1827 | nlmsg_report(nlh)); |
Jozsef Kadlecsik | 7d367e0 | 2012-02-24 11:45:49 +0100 | [diff] [blame] | 1828 | } |
Pablo Neira Ayuso | ff4ca82 | 2007-08-07 18:11:26 -0700 | [diff] [blame] | 1829 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1830 | |
Jozsef Kadlecsik | 7d367e0 | 2012-02-24 11:45:49 +0100 | [diff] [blame] | 1831 | nf_ct_put(ct); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1832 | return err; |
| 1833 | } |
| 1834 | |
Pablo Neira Ayuso | 392025f | 2012-06-26 20:27:09 +0200 | [diff] [blame] | 1835 | static int |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1836 | 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] | 1837 | __u16 cpu, const struct ip_conntrack_stat *st) |
| 1838 | { |
| 1839 | struct nlmsghdr *nlh; |
| 1840 | struct nfgenmsg *nfmsg; |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1841 | unsigned int flags = portid ? NLM_F_MULTI : 0, event; |
Pablo Neira Ayuso | 392025f | 2012-06-26 20:27:09 +0200 | [diff] [blame] | 1842 | |
| 1843 | event = (NFNL_SUBSYS_CTNETLINK << 8 | IPCTNL_MSG_CT_GET_STATS_CPU); |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1844 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags); |
Pablo Neira Ayuso | 392025f | 2012-06-26 20:27:09 +0200 | [diff] [blame] | 1845 | if (nlh == NULL) |
| 1846 | goto nlmsg_failure; |
| 1847 | |
| 1848 | nfmsg = nlmsg_data(nlh); |
| 1849 | nfmsg->nfgen_family = AF_UNSPEC; |
| 1850 | nfmsg->version = NFNETLINK_V0; |
| 1851 | nfmsg->res_id = htons(cpu); |
| 1852 | |
| 1853 | if (nla_put_be32(skb, CTA_STATS_SEARCHED, htonl(st->searched)) || |
| 1854 | nla_put_be32(skb, CTA_STATS_FOUND, htonl(st->found)) || |
| 1855 | nla_put_be32(skb, CTA_STATS_NEW, htonl(st->new)) || |
| 1856 | nla_put_be32(skb, CTA_STATS_INVALID, htonl(st->invalid)) || |
| 1857 | nla_put_be32(skb, CTA_STATS_IGNORE, htonl(st->ignore)) || |
| 1858 | nla_put_be32(skb, CTA_STATS_DELETE, htonl(st->delete)) || |
| 1859 | nla_put_be32(skb, CTA_STATS_DELETE_LIST, htonl(st->delete_list)) || |
| 1860 | nla_put_be32(skb, CTA_STATS_INSERT, htonl(st->insert)) || |
| 1861 | nla_put_be32(skb, CTA_STATS_INSERT_FAILED, |
| 1862 | htonl(st->insert_failed)) || |
| 1863 | nla_put_be32(skb, CTA_STATS_DROP, htonl(st->drop)) || |
| 1864 | nla_put_be32(skb, CTA_STATS_EARLY_DROP, htonl(st->early_drop)) || |
| 1865 | nla_put_be32(skb, CTA_STATS_ERROR, htonl(st->error)) || |
| 1866 | nla_put_be32(skb, CTA_STATS_SEARCH_RESTART, |
| 1867 | htonl(st->search_restart))) |
| 1868 | goto nla_put_failure; |
| 1869 | |
| 1870 | nlmsg_end(skb, nlh); |
| 1871 | return skb->len; |
| 1872 | |
| 1873 | nla_put_failure: |
| 1874 | nlmsg_failure: |
| 1875 | nlmsg_cancel(skb, nlh); |
| 1876 | return -1; |
| 1877 | } |
| 1878 | |
| 1879 | static int |
| 1880 | ctnetlink_ct_stat_cpu_dump(struct sk_buff *skb, struct netlink_callback *cb) |
| 1881 | { |
| 1882 | int cpu; |
| 1883 | struct net *net = sock_net(skb->sk); |
| 1884 | |
| 1885 | if (cb->args[0] == nr_cpu_ids) |
| 1886 | return 0; |
| 1887 | |
| 1888 | for (cpu = cb->args[0]; cpu < nr_cpu_ids; cpu++) { |
| 1889 | const struct ip_conntrack_stat *st; |
| 1890 | |
| 1891 | if (!cpu_possible(cpu)) |
| 1892 | continue; |
| 1893 | |
| 1894 | st = per_cpu_ptr(net->ct.stat, cpu); |
| 1895 | if (ctnetlink_ct_stat_cpu_fill_info(skb, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1896 | NETLINK_CB(cb->skb).portid, |
Pablo Neira Ayuso | 392025f | 2012-06-26 20:27:09 +0200 | [diff] [blame] | 1897 | cb->nlh->nlmsg_seq, |
| 1898 | cpu, st) < 0) |
| 1899 | break; |
| 1900 | } |
| 1901 | cb->args[0] = cpu; |
| 1902 | |
| 1903 | return skb->len; |
| 1904 | } |
| 1905 | |
| 1906 | static int |
| 1907 | ctnetlink_stat_ct_cpu(struct sock *ctnl, struct sk_buff *skb, |
| 1908 | const struct nlmsghdr *nlh, |
| 1909 | const struct nlattr * const cda[]) |
| 1910 | { |
| 1911 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
| 1912 | struct netlink_dump_control c = { |
| 1913 | .dump = ctnetlink_ct_stat_cpu_dump, |
| 1914 | }; |
| 1915 | return netlink_dump_start(ctnl, skb, nlh, &c); |
| 1916 | } |
| 1917 | |
| 1918 | return 0; |
| 1919 | } |
| 1920 | |
| 1921 | static int |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1922 | 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] | 1923 | struct net *net) |
| 1924 | { |
| 1925 | struct nlmsghdr *nlh; |
| 1926 | struct nfgenmsg *nfmsg; |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1927 | unsigned int flags = portid ? NLM_F_MULTI : 0, event; |
Pablo Neira Ayuso | 392025f | 2012-06-26 20:27:09 +0200 | [diff] [blame] | 1928 | unsigned int nr_conntracks = atomic_read(&net->ct.count); |
| 1929 | |
| 1930 | event = (NFNL_SUBSYS_CTNETLINK << 8 | IPCTNL_MSG_CT_GET_STATS); |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1931 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags); |
Pablo Neira Ayuso | 392025f | 2012-06-26 20:27:09 +0200 | [diff] [blame] | 1932 | if (nlh == NULL) |
| 1933 | goto nlmsg_failure; |
| 1934 | |
| 1935 | nfmsg = nlmsg_data(nlh); |
| 1936 | nfmsg->nfgen_family = AF_UNSPEC; |
| 1937 | nfmsg->version = NFNETLINK_V0; |
| 1938 | nfmsg->res_id = 0; |
| 1939 | |
| 1940 | if (nla_put_be32(skb, CTA_STATS_GLOBAL_ENTRIES, htonl(nr_conntracks))) |
| 1941 | goto nla_put_failure; |
| 1942 | |
| 1943 | nlmsg_end(skb, nlh); |
| 1944 | return skb->len; |
| 1945 | |
| 1946 | nla_put_failure: |
| 1947 | nlmsg_failure: |
| 1948 | nlmsg_cancel(skb, nlh); |
| 1949 | return -1; |
| 1950 | } |
| 1951 | |
| 1952 | static int |
| 1953 | ctnetlink_stat_ct(struct sock *ctnl, struct sk_buff *skb, |
| 1954 | const struct nlmsghdr *nlh, |
| 1955 | const struct nlattr * const cda[]) |
| 1956 | { |
| 1957 | struct sk_buff *skb2; |
| 1958 | int err; |
| 1959 | |
| 1960 | skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
| 1961 | if (skb2 == NULL) |
| 1962 | return -ENOMEM; |
| 1963 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1964 | err = ctnetlink_stat_ct_fill_info(skb2, NETLINK_CB(skb).portid, |
Pablo Neira Ayuso | 392025f | 2012-06-26 20:27:09 +0200 | [diff] [blame] | 1965 | nlh->nlmsg_seq, |
| 1966 | NFNL_MSG_TYPE(nlh->nlmsg_type), |
| 1967 | sock_net(skb->sk)); |
| 1968 | if (err <= 0) |
| 1969 | goto free; |
| 1970 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1971 | err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).portid, MSG_DONTWAIT); |
Pablo Neira Ayuso | 392025f | 2012-06-26 20:27:09 +0200 | [diff] [blame] | 1972 | if (err < 0) |
| 1973 | goto out; |
| 1974 | |
| 1975 | return 0; |
| 1976 | |
| 1977 | free: |
| 1978 | kfree_skb(skb2); |
| 1979 | out: |
| 1980 | /* this avoids a loop in nfnetlink. */ |
| 1981 | return err == -EAGAIN ? -ENOBUFS : err; |
| 1982 | } |
| 1983 | |
Pablo Neira Ayuso | bd07793 | 2013-08-07 18:13:20 +0200 | [diff] [blame] | 1984 | static const struct nla_policy exp_nla_policy[CTA_EXPECT_MAX+1] = { |
| 1985 | [CTA_EXPECT_MASTER] = { .type = NLA_NESTED }, |
| 1986 | [CTA_EXPECT_TUPLE] = { .type = NLA_NESTED }, |
| 1987 | [CTA_EXPECT_MASK] = { .type = NLA_NESTED }, |
| 1988 | [CTA_EXPECT_TIMEOUT] = { .type = NLA_U32 }, |
| 1989 | [CTA_EXPECT_ID] = { .type = NLA_U32 }, |
| 1990 | [CTA_EXPECT_HELP_NAME] = { .type = NLA_NUL_STRING, |
| 1991 | .len = NF_CT_HELPER_NAME_LEN - 1 }, |
| 1992 | [CTA_EXPECT_ZONE] = { .type = NLA_U16 }, |
| 1993 | [CTA_EXPECT_FLAGS] = { .type = NLA_U32 }, |
| 1994 | [CTA_EXPECT_CLASS] = { .type = NLA_U32 }, |
| 1995 | [CTA_EXPECT_NAT] = { .type = NLA_NESTED }, |
| 1996 | [CTA_EXPECT_FN] = { .type = NLA_NUL_STRING }, |
| 1997 | }; |
| 1998 | |
| 1999 | static struct nf_conntrack_expect * |
| 2000 | ctnetlink_alloc_expect(const struct nlattr *const cda[], struct nf_conn *ct, |
| 2001 | struct nf_conntrack_helper *helper, |
| 2002 | struct nf_conntrack_tuple *tuple, |
| 2003 | struct nf_conntrack_tuple *mask); |
| 2004 | |
Pablo Neira Ayuso | 7c62234 | 2012-06-19 02:10:57 +0200 | [diff] [blame] | 2005 | #ifdef CONFIG_NETFILTER_NETLINK_QUEUE_CT |
Pablo Neira Ayuso | 9cb0176 | 2012-06-07 12:13:39 +0200 | [diff] [blame] | 2006 | static size_t |
| 2007 | ctnetlink_nfqueue_build_size(const struct nf_conn *ct) |
| 2008 | { |
| 2009 | return 3 * nla_total_size(0) /* CTA_TUPLE_ORIG|REPL|MASTER */ |
| 2010 | + 3 * nla_total_size(0) /* CTA_TUPLE_IP */ |
| 2011 | + 3 * nla_total_size(0) /* CTA_TUPLE_PROTO */ |
| 2012 | + 3 * nla_total_size(sizeof(u_int8_t)) /* CTA_PROTO_NUM */ |
| 2013 | + nla_total_size(sizeof(u_int32_t)) /* CTA_ID */ |
| 2014 | + nla_total_size(sizeof(u_int32_t)) /* CTA_STATUS */ |
| 2015 | + nla_total_size(sizeof(u_int32_t)) /* CTA_TIMEOUT */ |
| 2016 | + nla_total_size(0) /* CTA_PROTOINFO */ |
| 2017 | + nla_total_size(0) /* CTA_HELP */ |
| 2018 | + nla_total_size(NF_CT_HELPER_NAME_LEN) /* CTA_HELP_NAME */ |
| 2019 | + ctnetlink_secctx_size(ct) |
| 2020 | #ifdef CONFIG_NF_NAT_NEEDED |
| 2021 | + 2 * nla_total_size(0) /* CTA_NAT_SEQ_ADJ_ORIG|REPL */ |
| 2022 | + 6 * nla_total_size(sizeof(u_int32_t)) /* CTA_NAT_SEQ_OFFSET */ |
| 2023 | #endif |
| 2024 | #ifdef CONFIG_NF_CONNTRACK_MARK |
| 2025 | + nla_total_size(sizeof(u_int32_t)) /* CTA_MARK */ |
| 2026 | #endif |
| 2027 | + ctnetlink_proto_size(ct) |
| 2028 | ; |
| 2029 | } |
| 2030 | |
| 2031 | static int |
| 2032 | ctnetlink_nfqueue_build(struct sk_buff *skb, struct nf_conn *ct) |
| 2033 | { |
| 2034 | struct nlattr *nest_parms; |
| 2035 | |
| 2036 | rcu_read_lock(); |
| 2037 | nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED); |
| 2038 | if (!nest_parms) |
| 2039 | goto nla_put_failure; |
| 2040 | if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0) |
| 2041 | goto nla_put_failure; |
| 2042 | nla_nest_end(skb, nest_parms); |
| 2043 | |
| 2044 | nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED); |
| 2045 | if (!nest_parms) |
| 2046 | goto nla_put_failure; |
| 2047 | if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0) |
| 2048 | goto nla_put_failure; |
| 2049 | nla_nest_end(skb, nest_parms); |
| 2050 | |
| 2051 | if (nf_ct_zone(ct)) { |
| 2052 | if (nla_put_be16(skb, CTA_ZONE, htons(nf_ct_zone(ct)))) |
| 2053 | goto nla_put_failure; |
| 2054 | } |
| 2055 | |
| 2056 | if (ctnetlink_dump_id(skb, ct) < 0) |
| 2057 | goto nla_put_failure; |
| 2058 | |
| 2059 | if (ctnetlink_dump_status(skb, ct) < 0) |
| 2060 | goto nla_put_failure; |
| 2061 | |
| 2062 | if (ctnetlink_dump_timeout(skb, ct) < 0) |
| 2063 | goto nla_put_failure; |
| 2064 | |
| 2065 | if (ctnetlink_dump_protoinfo(skb, ct) < 0) |
| 2066 | goto nla_put_failure; |
| 2067 | |
| 2068 | if (ctnetlink_dump_helpinfo(skb, ct) < 0) |
| 2069 | goto nla_put_failure; |
| 2070 | |
| 2071 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
| 2072 | if (ct->secmark && ctnetlink_dump_secctx(skb, ct) < 0) |
| 2073 | goto nla_put_failure; |
| 2074 | #endif |
| 2075 | if (ct->master && ctnetlink_dump_master(skb, ct) < 0) |
| 2076 | goto nla_put_failure; |
| 2077 | |
| 2078 | if ((ct->status & IPS_SEQ_ADJUST) && |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 2079 | ctnetlink_dump_ct_seq_adj(skb, ct) < 0) |
Pablo Neira Ayuso | 9cb0176 | 2012-06-07 12:13:39 +0200 | [diff] [blame] | 2080 | goto nla_put_failure; |
| 2081 | |
| 2082 | #ifdef CONFIG_NF_CONNTRACK_MARK |
| 2083 | if (ct->mark && ctnetlink_dump_mark(skb, ct) < 0) |
| 2084 | goto nla_put_failure; |
| 2085 | #endif |
Florian Westphal | 0ceabd8 | 2013-01-11 06:30:45 +0000 | [diff] [blame] | 2086 | if (ctnetlink_dump_labels(skb, ct) < 0) |
| 2087 | goto nla_put_failure; |
Pablo Neira Ayuso | 9cb0176 | 2012-06-07 12:13:39 +0200 | [diff] [blame] | 2088 | rcu_read_unlock(); |
| 2089 | return 0; |
| 2090 | |
| 2091 | nla_put_failure: |
| 2092 | rcu_read_unlock(); |
| 2093 | return -ENOSPC; |
| 2094 | } |
| 2095 | |
| 2096 | static int |
| 2097 | ctnetlink_nfqueue_parse_ct(const struct nlattr *cda[], struct nf_conn *ct) |
| 2098 | { |
| 2099 | int err; |
| 2100 | |
| 2101 | if (cda[CTA_TIMEOUT]) { |
| 2102 | err = ctnetlink_change_timeout(ct, cda); |
| 2103 | if (err < 0) |
| 2104 | return err; |
| 2105 | } |
| 2106 | if (cda[CTA_STATUS]) { |
| 2107 | err = ctnetlink_change_status(ct, cda); |
| 2108 | if (err < 0) |
| 2109 | return err; |
| 2110 | } |
| 2111 | if (cda[CTA_HELP]) { |
| 2112 | err = ctnetlink_change_helper(ct, cda); |
| 2113 | if (err < 0) |
| 2114 | return err; |
| 2115 | } |
Florian Westphal | 9b21f6a | 2013-01-11 06:30:46 +0000 | [diff] [blame] | 2116 | if (cda[CTA_LABELS]) { |
| 2117 | err = ctnetlink_attach_labels(ct, cda); |
| 2118 | if (err < 0) |
| 2119 | return err; |
| 2120 | } |
Pablo Neira Ayuso | 9cb0176 | 2012-06-07 12:13:39 +0200 | [diff] [blame] | 2121 | #if defined(CONFIG_NF_CONNTRACK_MARK) |
| 2122 | if (cda[CTA_MARK]) |
| 2123 | ct->mark = ntohl(nla_get_be32(cda[CTA_MARK])); |
| 2124 | #endif |
| 2125 | return 0; |
| 2126 | } |
| 2127 | |
| 2128 | static int |
| 2129 | ctnetlink_nfqueue_parse(const struct nlattr *attr, struct nf_conn *ct) |
| 2130 | { |
| 2131 | struct nlattr *cda[CTA_MAX+1]; |
Pablo Neira Ayuso | 68e035c | 2012-08-14 12:47:37 +0200 | [diff] [blame] | 2132 | int ret; |
Pablo Neira Ayuso | 9cb0176 | 2012-06-07 12:13:39 +0200 | [diff] [blame] | 2133 | |
Daniel Borkmann | 130ffbc | 2013-06-12 17:54:51 +0200 | [diff] [blame] | 2134 | ret = nla_parse_nested(cda, CTA_MAX, attr, ct_nla_policy); |
| 2135 | if (ret < 0) |
| 2136 | return ret; |
Pablo Neira Ayuso | 9cb0176 | 2012-06-07 12:13:39 +0200 | [diff] [blame] | 2137 | |
Pablo Neira Ayuso | 68e035c | 2012-08-14 12:47:37 +0200 | [diff] [blame] | 2138 | spin_lock_bh(&nf_conntrack_lock); |
| 2139 | ret = ctnetlink_nfqueue_parse_ct((const struct nlattr **)cda, ct); |
| 2140 | spin_unlock_bh(&nf_conntrack_lock); |
| 2141 | |
| 2142 | return ret; |
Pablo Neira Ayuso | 9cb0176 | 2012-06-07 12:13:39 +0200 | [diff] [blame] | 2143 | } |
| 2144 | |
Pablo Neira Ayuso | bd07793 | 2013-08-07 18:13:20 +0200 | [diff] [blame] | 2145 | static int ctnetlink_nfqueue_exp_parse(const struct nlattr * const *cda, |
| 2146 | const struct nf_conn *ct, |
| 2147 | struct nf_conntrack_tuple *tuple, |
| 2148 | struct nf_conntrack_tuple *mask) |
| 2149 | { |
| 2150 | int err; |
| 2151 | |
| 2152 | err = ctnetlink_parse_tuple(cda, tuple, CTA_EXPECT_TUPLE, |
| 2153 | nf_ct_l3num(ct)); |
| 2154 | if (err < 0) |
| 2155 | return err; |
| 2156 | |
| 2157 | return ctnetlink_parse_tuple(cda, mask, CTA_EXPECT_MASK, |
| 2158 | nf_ct_l3num(ct)); |
| 2159 | } |
| 2160 | |
| 2161 | static int |
| 2162 | ctnetlink_nfqueue_attach_expect(const struct nlattr *attr, struct nf_conn *ct, |
| 2163 | u32 portid, u32 report) |
| 2164 | { |
| 2165 | struct nlattr *cda[CTA_EXPECT_MAX+1]; |
| 2166 | struct nf_conntrack_tuple tuple, mask; |
Florian Westphal | b7e092c | 2013-08-27 11:47:26 +0200 | [diff] [blame] | 2167 | struct nf_conntrack_helper *helper = NULL; |
Pablo Neira Ayuso | bd07793 | 2013-08-07 18:13:20 +0200 | [diff] [blame] | 2168 | struct nf_conntrack_expect *exp; |
| 2169 | int err; |
| 2170 | |
| 2171 | err = nla_parse_nested(cda, CTA_EXPECT_MAX, attr, exp_nla_policy); |
| 2172 | if (err < 0) |
| 2173 | return err; |
| 2174 | |
| 2175 | err = ctnetlink_nfqueue_exp_parse((const struct nlattr * const *)cda, |
| 2176 | ct, &tuple, &mask); |
| 2177 | if (err < 0) |
| 2178 | return err; |
| 2179 | |
| 2180 | if (cda[CTA_EXPECT_HELP_NAME]) { |
| 2181 | const char *helpname = nla_data(cda[CTA_EXPECT_HELP_NAME]); |
| 2182 | |
| 2183 | helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct), |
| 2184 | nf_ct_protonum(ct)); |
| 2185 | if (helper == NULL) |
| 2186 | return -EOPNOTSUPP; |
| 2187 | } |
| 2188 | |
| 2189 | exp = ctnetlink_alloc_expect((const struct nlattr * const *)cda, ct, |
| 2190 | helper, &tuple, &mask); |
| 2191 | if (IS_ERR(exp)) |
| 2192 | return PTR_ERR(exp); |
| 2193 | |
| 2194 | err = nf_ct_expect_related_report(exp, portid, report); |
| 2195 | if (err < 0) { |
| 2196 | nf_ct_expect_put(exp); |
| 2197 | return err; |
| 2198 | } |
| 2199 | |
| 2200 | return 0; |
| 2201 | } |
| 2202 | |
Pablo Neira Ayuso | 9cb0176 | 2012-06-07 12:13:39 +0200 | [diff] [blame] | 2203 | static struct nfq_ct_hook ctnetlink_nfqueue_hook = { |
| 2204 | .build_size = ctnetlink_nfqueue_build_size, |
| 2205 | .build = ctnetlink_nfqueue_build, |
| 2206 | .parse = ctnetlink_nfqueue_parse, |
Pablo Neira Ayuso | bd07793 | 2013-08-07 18:13:20 +0200 | [diff] [blame] | 2207 | .attach_expect = ctnetlink_nfqueue_attach_expect, |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 2208 | .seq_adjust = nf_ct_tcp_seqadj_set, |
Pablo Neira Ayuso | 9cb0176 | 2012-06-07 12:13:39 +0200 | [diff] [blame] | 2209 | }; |
Pablo Neira Ayuso | 7c62234 | 2012-06-19 02:10:57 +0200 | [diff] [blame] | 2210 | #endif /* CONFIG_NETFILTER_NETLINK_QUEUE_CT */ |
Pablo Neira Ayuso | 9cb0176 | 2012-06-07 12:13:39 +0200 | [diff] [blame] | 2211 | |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 2212 | /*********************************************************************** |
| 2213 | * EXPECT |
| 2214 | ***********************************************************************/ |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2215 | |
| 2216 | static inline int |
| 2217 | ctnetlink_exp_dump_tuple(struct sk_buff *skb, |
| 2218 | const struct nf_conntrack_tuple *tuple, |
| 2219 | enum ctattr_expect type) |
| 2220 | { |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2221 | struct nlattr *nest_parms; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 2222 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2223 | nest_parms = nla_nest_start(skb, type | NLA_F_NESTED); |
| 2224 | if (!nest_parms) |
| 2225 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2226 | if (ctnetlink_dump_tuples(skb, tuple) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2227 | goto nla_put_failure; |
| 2228 | nla_nest_end(skb, nest_parms); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2229 | |
| 2230 | return 0; |
| 2231 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2232 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2233 | return -1; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 2234 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2235 | |
| 2236 | static inline int |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 2237 | ctnetlink_exp_dump_mask(struct sk_buff *skb, |
| 2238 | const struct nf_conntrack_tuple *tuple, |
Patrick McHardy | d4156e8 | 2007-07-07 22:31:32 -0700 | [diff] [blame] | 2239 | const struct nf_conntrack_tuple_mask *mask) |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 2240 | { |
| 2241 | int ret; |
| 2242 | struct nf_conntrack_l3proto *l3proto; |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 2243 | struct nf_conntrack_l4proto *l4proto; |
Patrick McHardy | d4156e8 | 2007-07-07 22:31:32 -0700 | [diff] [blame] | 2244 | struct nf_conntrack_tuple m; |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2245 | struct nlattr *nest_parms; |
Patrick McHardy | d4156e8 | 2007-07-07 22:31:32 -0700 | [diff] [blame] | 2246 | |
| 2247 | memset(&m, 0xFF, sizeof(m)); |
Patrick McHardy | d4156e8 | 2007-07-07 22:31:32 -0700 | [diff] [blame] | 2248 | memcpy(&m.src.u3, &mask->src.u3, sizeof(m.src.u3)); |
Patrick McHardy | e578756 | 2010-01-26 17:04:02 +0100 | [diff] [blame] | 2249 | m.src.u.all = mask->src.u.all; |
| 2250 | m.dst.protonum = tuple->dst.protonum; |
Patrick McHardy | d4156e8 | 2007-07-07 22:31:32 -0700 | [diff] [blame] | 2251 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2252 | nest_parms = nla_nest_start(skb, CTA_EXPECT_MASK | NLA_F_NESTED); |
| 2253 | if (!nest_parms) |
| 2254 | goto nla_put_failure; |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 2255 | |
Hans Schillstrom | 3b988ec | 2012-03-05 02:24:29 +0000 | [diff] [blame] | 2256 | rcu_read_lock(); |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 2257 | l3proto = __nf_ct_l3proto_find(tuple->src.l3num); |
Patrick McHardy | d4156e8 | 2007-07-07 22:31:32 -0700 | [diff] [blame] | 2258 | ret = ctnetlink_dump_tuples_ip(skb, &m, l3proto); |
Hans Schillstrom | 3b988ec | 2012-03-05 02:24:29 +0000 | [diff] [blame] | 2259 | if (ret >= 0) { |
| 2260 | l4proto = __nf_ct_l4proto_find(tuple->src.l3num, |
| 2261 | tuple->dst.protonum); |
Patrick McHardy | d4156e8 | 2007-07-07 22:31:32 -0700 | [diff] [blame] | 2262 | ret = ctnetlink_dump_tuples_proto(skb, &m, l4proto); |
Hans Schillstrom | 3b988ec | 2012-03-05 02:24:29 +0000 | [diff] [blame] | 2263 | } |
| 2264 | rcu_read_unlock(); |
| 2265 | |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 2266 | if (unlikely(ret < 0)) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2267 | goto nla_put_failure; |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 2268 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2269 | nla_nest_end(skb, nest_parms); |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 2270 | |
| 2271 | return 0; |
| 2272 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2273 | nla_put_failure: |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 2274 | return -1; |
| 2275 | } |
| 2276 | |
Patrick McHardy | c7232c9 | 2012-08-26 19:14:06 +0200 | [diff] [blame] | 2277 | static const union nf_inet_addr any_addr; |
| 2278 | |
Ilpo Järvinen | bb5cf80 | 2008-01-05 23:11:31 -0800 | [diff] [blame] | 2279 | static int |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2280 | ctnetlink_exp_dump_expect(struct sk_buff *skb, |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 2281 | const struct nf_conntrack_expect *exp) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2282 | { |
| 2283 | struct nf_conn *master = exp->master; |
Xi Wang | c121638 | 2011-12-30 10:40:17 -0500 | [diff] [blame] | 2284 | long timeout = ((long)exp->timeout.expires - (long)jiffies) / HZ; |
Pablo Neira Ayuso | bc01befd | 2010-09-28 21:06:34 +0200 | [diff] [blame] | 2285 | struct nf_conn_help *help; |
Pablo Neira Ayuso | 076a0ca | 2012-02-05 03:41:52 +0100 | [diff] [blame] | 2286 | #ifdef CONFIG_NF_NAT_NEEDED |
| 2287 | struct nlattr *nest_parms; |
| 2288 | struct nf_conntrack_tuple nat_tuple = {}; |
| 2289 | #endif |
Pablo Neira Ayuso | 544d5c7 | 2012-02-05 03:44:51 +0100 | [diff] [blame] | 2290 | struct nf_ct_helper_expectfn *expfn; |
| 2291 | |
Patrick McHardy | d978e5d | 2007-12-17 22:37:03 -0800 | [diff] [blame] | 2292 | if (timeout < 0) |
| 2293 | timeout = 0; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2294 | |
| 2295 | if (ctnetlink_exp_dump_tuple(skb, &exp->tuple, CTA_EXPECT_TUPLE) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2296 | goto nla_put_failure; |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 2297 | if (ctnetlink_exp_dump_mask(skb, &exp->tuple, &exp->mask) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2298 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2299 | if (ctnetlink_exp_dump_tuple(skb, |
| 2300 | &master->tuplehash[IP_CT_DIR_ORIGINAL].tuple, |
| 2301 | CTA_EXPECT_MASTER) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2302 | goto nla_put_failure; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 2303 | |
Pablo Neira Ayuso | 076a0ca | 2012-02-05 03:41:52 +0100 | [diff] [blame] | 2304 | #ifdef CONFIG_NF_NAT_NEEDED |
Patrick McHardy | c7232c9 | 2012-08-26 19:14:06 +0200 | [diff] [blame] | 2305 | if (!nf_inet_addr_cmp(&exp->saved_addr, &any_addr) || |
| 2306 | exp->saved_proto.all) { |
Pablo Neira Ayuso | 076a0ca | 2012-02-05 03:41:52 +0100 | [diff] [blame] | 2307 | nest_parms = nla_nest_start(skb, CTA_EXPECT_NAT | NLA_F_NESTED); |
| 2308 | if (!nest_parms) |
| 2309 | goto nla_put_failure; |
| 2310 | |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 2311 | if (nla_put_be32(skb, CTA_EXPECT_NAT_DIR, htonl(exp->dir))) |
| 2312 | goto nla_put_failure; |
Pablo Neira Ayuso | 076a0ca | 2012-02-05 03:41:52 +0100 | [diff] [blame] | 2313 | |
| 2314 | nat_tuple.src.l3num = nf_ct_l3num(master); |
Patrick McHardy | c7232c9 | 2012-08-26 19:14:06 +0200 | [diff] [blame] | 2315 | nat_tuple.src.u3 = exp->saved_addr; |
Pablo Neira Ayuso | 076a0ca | 2012-02-05 03:41:52 +0100 | [diff] [blame] | 2316 | nat_tuple.dst.protonum = nf_ct_protonum(master); |
| 2317 | nat_tuple.src.u = exp->saved_proto; |
| 2318 | |
| 2319 | if (ctnetlink_exp_dump_tuple(skb, &nat_tuple, |
| 2320 | CTA_EXPECT_NAT_TUPLE) < 0) |
| 2321 | goto nla_put_failure; |
| 2322 | nla_nest_end(skb, nest_parms); |
| 2323 | } |
| 2324 | #endif |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 2325 | if (nla_put_be32(skb, CTA_EXPECT_TIMEOUT, htonl(timeout)) || |
| 2326 | nla_put_be32(skb, CTA_EXPECT_ID, htonl((unsigned long)exp)) || |
| 2327 | nla_put_be32(skb, CTA_EXPECT_FLAGS, htonl(exp->flags)) || |
| 2328 | nla_put_be32(skb, CTA_EXPECT_CLASS, htonl(exp->class))) |
| 2329 | goto nla_put_failure; |
Pablo Neira Ayuso | bc01befd | 2010-09-28 21:06:34 +0200 | [diff] [blame] | 2330 | help = nfct_help(master); |
| 2331 | if (help) { |
| 2332 | struct nf_conntrack_helper *helper; |
| 2333 | |
| 2334 | helper = rcu_dereference(help->helper); |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 2335 | if (helper && |
| 2336 | nla_put_string(skb, CTA_EXPECT_HELP_NAME, helper->name)) |
| 2337 | goto nla_put_failure; |
Pablo Neira Ayuso | bc01befd | 2010-09-28 21:06:34 +0200 | [diff] [blame] | 2338 | } |
Pablo Neira Ayuso | 544d5c7 | 2012-02-05 03:44:51 +0100 | [diff] [blame] | 2339 | expfn = nf_ct_helper_expectfn_find_by_symbol(exp->expectfn); |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 2340 | if (expfn != NULL && |
| 2341 | nla_put_string(skb, CTA_EXPECT_FN, expfn->name)) |
| 2342 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2343 | |
| 2344 | return 0; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 2345 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2346 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2347 | return -1; |
| 2348 | } |
| 2349 | |
| 2350 | static int |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2351 | 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] | 2352 | int event, const struct nf_conntrack_expect *exp) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2353 | { |
| 2354 | struct nlmsghdr *nlh; |
| 2355 | struct nfgenmsg *nfmsg; |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2356 | unsigned int flags = portid ? NLM_F_MULTI : 0; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2357 | |
| 2358 | event |= NFNL_SUBSYS_CTNETLINK_EXP << 8; |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2359 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags); |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 2360 | if (nlh == NULL) |
| 2361 | goto nlmsg_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2362 | |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 2363 | nfmsg = nlmsg_data(nlh); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2364 | nfmsg->nfgen_family = exp->tuple.src.l3num; |
| 2365 | nfmsg->version = NFNETLINK_V0; |
| 2366 | nfmsg->res_id = 0; |
| 2367 | |
| 2368 | if (ctnetlink_exp_dump_expect(skb, exp) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2369 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2370 | |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 2371 | nlmsg_end(skb, nlh); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2372 | return skb->len; |
| 2373 | |
| 2374 | nlmsg_failure: |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2375 | nla_put_failure: |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 2376 | nlmsg_cancel(skb, nlh); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2377 | return -1; |
| 2378 | } |
| 2379 | |
| 2380 | #ifdef CONFIG_NF_CONNTRACK_EVENTS |
Pablo Neira Ayuso | e34d5c1 | 2009-06-03 10:32:06 +0200 | [diff] [blame] | 2381 | static int |
| 2382 | ctnetlink_expect_event(unsigned int events, struct nf_exp_event *item) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2383 | { |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 2384 | struct nf_conntrack_expect *exp = item->exp; |
| 2385 | struct net *net = nf_ct_exp_net(exp); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2386 | struct nlmsghdr *nlh; |
| 2387 | struct nfgenmsg *nfmsg; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2388 | struct sk_buff *skb; |
Pablo Neira Ayuso | ebbf41d | 2010-10-19 10:19:06 +0200 | [diff] [blame] | 2389 | unsigned int type, group; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2390 | int flags = 0; |
| 2391 | |
Pablo Neira Ayuso | ebbf41d | 2010-10-19 10:19:06 +0200 | [diff] [blame] | 2392 | if (events & (1 << IPEXP_DESTROY)) { |
| 2393 | type = IPCTNL_MSG_EXP_DELETE; |
| 2394 | group = NFNLGRP_CONNTRACK_EXP_DESTROY; |
| 2395 | } else if (events & (1 << IPEXP_NEW)) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2396 | type = IPCTNL_MSG_EXP_NEW; |
| 2397 | flags = NLM_F_CREATE|NLM_F_EXCL; |
Pablo Neira Ayuso | ebbf41d | 2010-10-19 10:19:06 +0200 | [diff] [blame] | 2398 | group = NFNLGRP_CONNTRACK_EXP_NEW; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2399 | } else |
Pablo Neira Ayuso | e34d5c1 | 2009-06-03 10:32:06 +0200 | [diff] [blame] | 2400 | return 0; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2401 | |
Pablo Neira Ayuso | ebbf41d | 2010-10-19 10:19:06 +0200 | [diff] [blame] | 2402 | if (!item->report && !nfnetlink_has_listeners(net, group)) |
Pablo Neira Ayuso | e34d5c1 | 2009-06-03 10:32:06 +0200 | [diff] [blame] | 2403 | return 0; |
Pablo Neira Ayuso | b3a27bf | 2006-08-22 00:32:05 -0700 | [diff] [blame] | 2404 | |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 2405 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
| 2406 | if (skb == NULL) |
Pablo Neira Ayuso | 150ace0 | 2009-04-17 17:47:31 +0200 | [diff] [blame] | 2407 | goto errout; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2408 | |
Marcus Sundberg | b633ad5 | 2006-02-04 02:11:09 -0800 | [diff] [blame] | 2409 | type |= NFNL_SUBSYS_CTNETLINK_EXP << 8; |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2410 | nlh = nlmsg_put(skb, item->portid, 0, type, sizeof(*nfmsg), flags); |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 2411 | if (nlh == NULL) |
| 2412 | goto nlmsg_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2413 | |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 2414 | nfmsg = nlmsg_data(nlh); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2415 | nfmsg->nfgen_family = exp->tuple.src.l3num; |
| 2416 | nfmsg->version = NFNETLINK_V0; |
| 2417 | nfmsg->res_id = 0; |
| 2418 | |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 2419 | rcu_read_lock(); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2420 | if (ctnetlink_exp_dump_expect(skb, exp) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2421 | goto nla_put_failure; |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 2422 | rcu_read_unlock(); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2423 | |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 2424 | nlmsg_end(skb, nlh); |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2425 | nfnetlink_send(skb, net, item->portid, group, item->report, GFP_ATOMIC); |
Pablo Neira Ayuso | e34d5c1 | 2009-06-03 10:32:06 +0200 | [diff] [blame] | 2426 | return 0; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2427 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2428 | nla_put_failure: |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 2429 | rcu_read_unlock(); |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 2430 | nlmsg_cancel(skb, nlh); |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 2431 | nlmsg_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2432 | kfree_skb(skb); |
Pablo Neira Ayuso | 150ace0 | 2009-04-17 17:47:31 +0200 | [diff] [blame] | 2433 | errout: |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 2434 | nfnetlink_set_err(net, 0, 0, -ENOBUFS); |
Pablo Neira Ayuso | e34d5c1 | 2009-06-03 10:32:06 +0200 | [diff] [blame] | 2435 | return 0; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2436 | } |
| 2437 | #endif |
Patrick McHardy | cf6994c | 2007-07-07 22:32:34 -0700 | [diff] [blame] | 2438 | static int ctnetlink_exp_done(struct netlink_callback *cb) |
| 2439 | { |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 2440 | if (cb->args[1]) |
| 2441 | nf_ct_expect_put((struct nf_conntrack_expect *)cb->args[1]); |
Patrick McHardy | cf6994c | 2007-07-07 22:32:34 -0700 | [diff] [blame] | 2442 | return 0; |
| 2443 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2444 | |
| 2445 | static int |
| 2446 | ctnetlink_exp_dump_table(struct sk_buff *skb, struct netlink_callback *cb) |
| 2447 | { |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 2448 | struct net *net = sock_net(skb->sk); |
Patrick McHardy | cf6994c | 2007-07-07 22:32:34 -0700 | [diff] [blame] | 2449 | struct nf_conntrack_expect *exp, *last; |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 2450 | struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh); |
Pablo Neira Ayuso | 87711cb | 2006-01-05 12:19:23 -0800 | [diff] [blame] | 2451 | u_int8_t l3proto = nfmsg->nfgen_family; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2452 | |
Patrick McHardy | 7d0742d | 2008-01-31 04:38:19 -0800 | [diff] [blame] | 2453 | rcu_read_lock(); |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 2454 | last = (struct nf_conntrack_expect *)cb->args[1]; |
| 2455 | for (; cb->args[0] < nf_ct_expect_hsize; cb->args[0]++) { |
Patrick McHardy | cf6994c | 2007-07-07 22:32:34 -0700 | [diff] [blame] | 2456 | restart: |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 2457 | hlist_for_each_entry(exp, &net->ct.expect_hash[cb->args[0]], |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 2458 | hnode) { |
| 2459 | if (l3proto && exp->tuple.src.l3num != l3proto) |
Patrick McHardy | cf6994c | 2007-07-07 22:32:34 -0700 | [diff] [blame] | 2460 | continue; |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 2461 | if (cb->args[1]) { |
| 2462 | if (exp != last) |
| 2463 | continue; |
| 2464 | cb->args[1] = 0; |
| 2465 | } |
Pablo Neira Ayuso | 8b0a231 | 2009-06-02 20:03:34 +0200 | [diff] [blame] | 2466 | if (ctnetlink_exp_fill_info(skb, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2467 | NETLINK_CB(cb->skb).portid, |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 2468 | cb->nlh->nlmsg_seq, |
| 2469 | IPCTNL_MSG_EXP_NEW, |
Pablo Neira Ayuso | 8b0a231 | 2009-06-02 20:03:34 +0200 | [diff] [blame] | 2470 | exp) < 0) { |
Patrick McHardy | 7d0742d | 2008-01-31 04:38:19 -0800 | [diff] [blame] | 2471 | if (!atomic_inc_not_zero(&exp->use)) |
| 2472 | continue; |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 2473 | cb->args[1] = (unsigned long)exp; |
| 2474 | goto out; |
| 2475 | } |
Patrick McHardy | cf6994c | 2007-07-07 22:32:34 -0700 | [diff] [blame] | 2476 | } |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 2477 | if (cb->args[1]) { |
| 2478 | cb->args[1] = 0; |
| 2479 | goto restart; |
Patrick McHardy | cf6994c | 2007-07-07 22:32:34 -0700 | [diff] [blame] | 2480 | } |
| 2481 | } |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 2482 | out: |
Patrick McHardy | 7d0742d | 2008-01-31 04:38:19 -0800 | [diff] [blame] | 2483 | rcu_read_unlock(); |
Patrick McHardy | cf6994c | 2007-07-07 22:32:34 -0700 | [diff] [blame] | 2484 | if (last) |
| 2485 | nf_ct_expect_put(last); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2486 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2487 | return skb->len; |
| 2488 | } |
| 2489 | |
Pablo Neira Ayuso | e844a92 | 2013-03-17 23:21:36 +0000 | [diff] [blame] | 2490 | static int |
| 2491 | ctnetlink_exp_ct_dump_table(struct sk_buff *skb, struct netlink_callback *cb) |
| 2492 | { |
| 2493 | struct nf_conntrack_expect *exp, *last; |
| 2494 | struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh); |
| 2495 | struct nf_conn *ct = cb->data; |
| 2496 | struct nf_conn_help *help = nfct_help(ct); |
| 2497 | u_int8_t l3proto = nfmsg->nfgen_family; |
| 2498 | |
| 2499 | if (cb->args[0]) |
| 2500 | return 0; |
| 2501 | |
| 2502 | rcu_read_lock(); |
| 2503 | last = (struct nf_conntrack_expect *)cb->args[1]; |
| 2504 | restart: |
| 2505 | hlist_for_each_entry(exp, &help->expectations, lnode) { |
| 2506 | if (l3proto && exp->tuple.src.l3num != l3proto) |
| 2507 | continue; |
| 2508 | if (cb->args[1]) { |
| 2509 | if (exp != last) |
| 2510 | continue; |
| 2511 | cb->args[1] = 0; |
| 2512 | } |
| 2513 | if (ctnetlink_exp_fill_info(skb, NETLINK_CB(cb->skb).portid, |
| 2514 | cb->nlh->nlmsg_seq, |
| 2515 | IPCTNL_MSG_EXP_NEW, |
| 2516 | exp) < 0) { |
| 2517 | if (!atomic_inc_not_zero(&exp->use)) |
| 2518 | continue; |
| 2519 | cb->args[1] = (unsigned long)exp; |
| 2520 | goto out; |
| 2521 | } |
| 2522 | } |
| 2523 | if (cb->args[1]) { |
| 2524 | cb->args[1] = 0; |
| 2525 | goto restart; |
| 2526 | } |
| 2527 | cb->args[0] = 1; |
| 2528 | out: |
| 2529 | rcu_read_unlock(); |
| 2530 | if (last) |
| 2531 | nf_ct_expect_put(last); |
| 2532 | |
| 2533 | return skb->len; |
| 2534 | } |
| 2535 | |
| 2536 | static int ctnetlink_dump_exp_ct(struct sock *ctnl, struct sk_buff *skb, |
| 2537 | const struct nlmsghdr *nlh, |
| 2538 | const struct nlattr * const cda[]) |
| 2539 | { |
| 2540 | int err; |
| 2541 | struct net *net = sock_net(ctnl); |
| 2542 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
| 2543 | u_int8_t u3 = nfmsg->nfgen_family; |
| 2544 | struct nf_conntrack_tuple tuple; |
| 2545 | struct nf_conntrack_tuple_hash *h; |
| 2546 | struct nf_conn *ct; |
| 2547 | u16 zone = 0; |
| 2548 | struct netlink_dump_control c = { |
| 2549 | .dump = ctnetlink_exp_ct_dump_table, |
| 2550 | .done = ctnetlink_exp_done, |
| 2551 | }; |
| 2552 | |
| 2553 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_MASTER, u3); |
| 2554 | if (err < 0) |
| 2555 | return err; |
| 2556 | |
| 2557 | if (cda[CTA_EXPECT_ZONE]) { |
| 2558 | err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone); |
| 2559 | if (err < 0) |
| 2560 | return err; |
| 2561 | } |
| 2562 | |
| 2563 | h = nf_conntrack_find_get(net, zone, &tuple); |
| 2564 | if (!h) |
| 2565 | return -ENOENT; |
| 2566 | |
| 2567 | ct = nf_ct_tuplehash_to_ctrack(h); |
| 2568 | c.data = ct; |
| 2569 | |
| 2570 | err = netlink_dump_start(ctnl, skb, nlh, &c); |
| 2571 | nf_ct_put(ct); |
| 2572 | |
| 2573 | return err; |
| 2574 | } |
| 2575 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2576 | static int |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 2577 | ctnetlink_get_expect(struct sock *ctnl, struct sk_buff *skb, |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 2578 | const struct nlmsghdr *nlh, |
| 2579 | const struct nlattr * const cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2580 | { |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 2581 | struct net *net = sock_net(ctnl); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2582 | struct nf_conntrack_tuple tuple; |
| 2583 | struct nf_conntrack_expect *exp; |
| 2584 | struct sk_buff *skb2; |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 2585 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2586 | u_int8_t u3 = nfmsg->nfgen_family; |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 2587 | u16 zone; |
| 2588 | int err; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2589 | |
David S. Miller | b8f3ab4 | 2011-01-18 12:40:38 -0800 | [diff] [blame] | 2590 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
Pablo Neira Ayuso | e844a92 | 2013-03-17 23:21:36 +0000 | [diff] [blame] | 2591 | if (cda[CTA_EXPECT_MASTER]) |
| 2592 | return ctnetlink_dump_exp_ct(ctnl, skb, nlh, cda); |
| 2593 | else { |
| 2594 | struct netlink_dump_control c = { |
| 2595 | .dump = ctnetlink_exp_dump_table, |
| 2596 | .done = ctnetlink_exp_done, |
| 2597 | }; |
| 2598 | return netlink_dump_start(ctnl, skb, nlh, &c); |
| 2599 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2600 | } |
| 2601 | |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 2602 | err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone); |
| 2603 | if (err < 0) |
| 2604 | return err; |
| 2605 | |
Pablo Neira Ayuso | 35dba1d | 2011-12-14 12:45:22 +0100 | [diff] [blame] | 2606 | if (cda[CTA_EXPECT_TUPLE]) |
| 2607 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); |
| 2608 | else if (cda[CTA_EXPECT_MASTER]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2609 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_MASTER, u3); |
| 2610 | else |
| 2611 | return -EINVAL; |
| 2612 | |
| 2613 | if (err < 0) |
| 2614 | return err; |
| 2615 | |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 2616 | exp = nf_ct_expect_find_get(net, zone, &tuple); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2617 | if (!exp) |
| 2618 | return -ENOENT; |
| 2619 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2620 | if (cda[CTA_EXPECT_ID]) { |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 2621 | __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]); |
Patrick McHardy | 3583240 | 2007-09-28 14:41:50 -0700 | [diff] [blame] | 2622 | if (ntohl(id) != (u32)(unsigned long)exp) { |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 2623 | nf_ct_expect_put(exp); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2624 | return -ENOENT; |
| 2625 | } |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 2626 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2627 | |
| 2628 | err = -ENOMEM; |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 2629 | skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
Pablo Neira Ayuso | 81378f7 | 2011-12-24 19:03:46 +0100 | [diff] [blame] | 2630 | if (skb2 == NULL) { |
| 2631 | nf_ct_expect_put(exp); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2632 | goto out; |
Pablo Neira Ayuso | 81378f7 | 2011-12-24 19:03:46 +0100 | [diff] [blame] | 2633 | } |
Thomas Graf | 4e9b826 | 2006-11-27 09:25:58 -0800 | [diff] [blame] | 2634 | |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 2635 | rcu_read_lock(); |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2636 | err = ctnetlink_exp_fill_info(skb2, NETLINK_CB(skb).portid, |
Pablo Neira Ayuso | 8b0a231 | 2009-06-02 20:03:34 +0200 | [diff] [blame] | 2637 | nlh->nlmsg_seq, IPCTNL_MSG_EXP_NEW, exp); |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 2638 | rcu_read_unlock(); |
Pablo Neira Ayuso | 81378f7 | 2011-12-24 19:03:46 +0100 | [diff] [blame] | 2639 | nf_ct_expect_put(exp); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2640 | if (err <= 0) |
| 2641 | goto free; |
| 2642 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2643 | err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).portid, MSG_DONTWAIT); |
Pablo Neira Ayuso | 81378f7 | 2011-12-24 19:03:46 +0100 | [diff] [blame] | 2644 | if (err < 0) |
| 2645 | goto out; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2646 | |
Pablo Neira Ayuso | 81378f7 | 2011-12-24 19:03:46 +0100 | [diff] [blame] | 2647 | return 0; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2648 | |
| 2649 | free: |
| 2650 | kfree_skb(skb2); |
| 2651 | out: |
Pablo Neira Ayuso | 81378f7 | 2011-12-24 19:03:46 +0100 | [diff] [blame] | 2652 | /* this avoids a loop in nfnetlink. */ |
| 2653 | return err == -EAGAIN ? -ENOBUFS : err; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2654 | } |
| 2655 | |
| 2656 | static int |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 2657 | ctnetlink_del_expect(struct sock *ctnl, struct sk_buff *skb, |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 2658 | const struct nlmsghdr *nlh, |
| 2659 | const struct nlattr * const cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2660 | { |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 2661 | struct net *net = sock_net(ctnl); |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 2662 | struct nf_conntrack_expect *exp; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2663 | struct nf_conntrack_tuple tuple; |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 2664 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 2665 | struct hlist_node *next; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2666 | u_int8_t u3 = nfmsg->nfgen_family; |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 2667 | unsigned int i; |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 2668 | u16 zone; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2669 | int err; |
| 2670 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2671 | if (cda[CTA_EXPECT_TUPLE]) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2672 | /* delete a single expect by tuple */ |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 2673 | err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone); |
| 2674 | if (err < 0) |
| 2675 | return err; |
| 2676 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2677 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); |
| 2678 | if (err < 0) |
| 2679 | return err; |
| 2680 | |
| 2681 | /* bump usage count to 2 */ |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 2682 | exp = nf_ct_expect_find_get(net, zone, &tuple); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2683 | if (!exp) |
| 2684 | return -ENOENT; |
| 2685 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2686 | if (cda[CTA_EXPECT_ID]) { |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 2687 | __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]); |
Patrick McHardy | 3583240 | 2007-09-28 14:41:50 -0700 | [diff] [blame] | 2688 | if (ntohl(id) != (u32)(unsigned long)exp) { |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 2689 | nf_ct_expect_put(exp); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2690 | return -ENOENT; |
| 2691 | } |
| 2692 | } |
| 2693 | |
| 2694 | /* after list removal, usage count == 1 */ |
Pablo Neira Ayuso | ebbf41d | 2010-10-19 10:19:06 +0200 | [diff] [blame] | 2695 | spin_lock_bh(&nf_conntrack_lock); |
| 2696 | if (del_timer(&exp->timeout)) { |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2697 | nf_ct_unlink_expect_report(exp, NETLINK_CB(skb).portid, |
Pablo Neira Ayuso | ebbf41d | 2010-10-19 10:19:06 +0200 | [diff] [blame] | 2698 | nlmsg_report(nlh)); |
| 2699 | nf_ct_expect_put(exp); |
| 2700 | } |
| 2701 | spin_unlock_bh(&nf_conntrack_lock); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 2702 | /* have to put what we 'get' above. |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2703 | * after this line usage count == 0 */ |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 2704 | nf_ct_expect_put(exp); |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2705 | } else if (cda[CTA_EXPECT_HELP_NAME]) { |
| 2706 | char *name = nla_data(cda[CTA_EXPECT_HELP_NAME]); |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 2707 | struct nf_conn_help *m_help; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2708 | |
| 2709 | /* delete all expectations for this helper */ |
Patrick McHardy | f8ba1af | 2008-01-31 04:38:58 -0800 | [diff] [blame] | 2710 | spin_lock_bh(&nf_conntrack_lock); |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 2711 | for (i = 0; i < nf_ct_expect_hsize; i++) { |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 2712 | hlist_for_each_entry_safe(exp, next, |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 2713 | &net->ct.expect_hash[i], |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 2714 | hnode) { |
| 2715 | m_help = nfct_help(exp->master); |
Patrick McHardy | 794e687 | 2010-02-03 13:41:29 +0100 | [diff] [blame] | 2716 | if (!strcmp(m_help->helper->name, name) && |
| 2717 | del_timer(&exp->timeout)) { |
Pablo Neira Ayuso | ebbf41d | 2010-10-19 10:19:06 +0200 | [diff] [blame] | 2718 | nf_ct_unlink_expect_report(exp, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2719 | NETLINK_CB(skb).portid, |
Pablo Neira Ayuso | ebbf41d | 2010-10-19 10:19:06 +0200 | [diff] [blame] | 2720 | nlmsg_report(nlh)); |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 2721 | nf_ct_expect_put(exp); |
| 2722 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2723 | } |
| 2724 | } |
Patrick McHardy | f8ba1af | 2008-01-31 04:38:58 -0800 | [diff] [blame] | 2725 | spin_unlock_bh(&nf_conntrack_lock); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2726 | } else { |
| 2727 | /* This basically means we have to flush everything*/ |
Patrick McHardy | f8ba1af | 2008-01-31 04:38:58 -0800 | [diff] [blame] | 2728 | spin_lock_bh(&nf_conntrack_lock); |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 2729 | for (i = 0; i < nf_ct_expect_hsize; i++) { |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 2730 | hlist_for_each_entry_safe(exp, next, |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 2731 | &net->ct.expect_hash[i], |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 2732 | hnode) { |
| 2733 | if (del_timer(&exp->timeout)) { |
Pablo Neira Ayuso | ebbf41d | 2010-10-19 10:19:06 +0200 | [diff] [blame] | 2734 | nf_ct_unlink_expect_report(exp, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2735 | NETLINK_CB(skb).portid, |
Pablo Neira Ayuso | ebbf41d | 2010-10-19 10:19:06 +0200 | [diff] [blame] | 2736 | nlmsg_report(nlh)); |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 2737 | nf_ct_expect_put(exp); |
| 2738 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2739 | } |
| 2740 | } |
Patrick McHardy | f8ba1af | 2008-01-31 04:38:58 -0800 | [diff] [blame] | 2741 | spin_unlock_bh(&nf_conntrack_lock); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2742 | } |
| 2743 | |
| 2744 | return 0; |
| 2745 | } |
| 2746 | static int |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 2747 | ctnetlink_change_expect(struct nf_conntrack_expect *x, |
| 2748 | const struct nlattr * const cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2749 | { |
Kelvie Wong | 9768e1a | 2012-05-02 14:39:24 +0000 | [diff] [blame] | 2750 | if (cda[CTA_EXPECT_TIMEOUT]) { |
| 2751 | if (!del_timer(&x->timeout)) |
| 2752 | return -ETIME; |
| 2753 | |
| 2754 | x->timeout.expires = jiffies + |
| 2755 | ntohl(nla_get_be32(cda[CTA_EXPECT_TIMEOUT])) * HZ; |
| 2756 | add_timer(&x->timeout); |
| 2757 | } |
| 2758 | return 0; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2759 | } |
| 2760 | |
Pablo Neira Ayuso | 076a0ca | 2012-02-05 03:41:52 +0100 | [diff] [blame] | 2761 | static const struct nla_policy exp_nat_nla_policy[CTA_EXPECT_NAT_MAX+1] = { |
| 2762 | [CTA_EXPECT_NAT_DIR] = { .type = NLA_U32 }, |
| 2763 | [CTA_EXPECT_NAT_TUPLE] = { .type = NLA_NESTED }, |
| 2764 | }; |
| 2765 | |
| 2766 | static int |
| 2767 | ctnetlink_parse_expect_nat(const struct nlattr *attr, |
| 2768 | struct nf_conntrack_expect *exp, |
| 2769 | u_int8_t u3) |
| 2770 | { |
| 2771 | #ifdef CONFIG_NF_NAT_NEEDED |
| 2772 | struct nlattr *tb[CTA_EXPECT_NAT_MAX+1]; |
| 2773 | struct nf_conntrack_tuple nat_tuple = {}; |
| 2774 | int err; |
| 2775 | |
Daniel Borkmann | 130ffbc | 2013-06-12 17:54:51 +0200 | [diff] [blame] | 2776 | err = nla_parse_nested(tb, CTA_EXPECT_NAT_MAX, attr, exp_nat_nla_policy); |
| 2777 | if (err < 0) |
| 2778 | return err; |
Pablo Neira Ayuso | 076a0ca | 2012-02-05 03:41:52 +0100 | [diff] [blame] | 2779 | |
| 2780 | if (!tb[CTA_EXPECT_NAT_DIR] || !tb[CTA_EXPECT_NAT_TUPLE]) |
| 2781 | return -EINVAL; |
| 2782 | |
| 2783 | err = ctnetlink_parse_tuple((const struct nlattr * const *)tb, |
| 2784 | &nat_tuple, CTA_EXPECT_NAT_TUPLE, u3); |
| 2785 | if (err < 0) |
| 2786 | return err; |
| 2787 | |
Patrick McHardy | c7232c9 | 2012-08-26 19:14:06 +0200 | [diff] [blame] | 2788 | exp->saved_addr = nat_tuple.src.u3; |
Pablo Neira Ayuso | 076a0ca | 2012-02-05 03:41:52 +0100 | [diff] [blame] | 2789 | exp->saved_proto = nat_tuple.src.u; |
| 2790 | exp->dir = ntohl(nla_get_be32(tb[CTA_EXPECT_NAT_DIR])); |
| 2791 | |
| 2792 | return 0; |
| 2793 | #else |
| 2794 | return -EOPNOTSUPP; |
| 2795 | #endif |
| 2796 | } |
| 2797 | |
Pablo Neira Ayuso | 0ef71ee | 2013-08-07 19:12:34 +0200 | [diff] [blame] | 2798 | static struct nf_conntrack_expect * |
| 2799 | ctnetlink_alloc_expect(const struct nlattr * const cda[], struct nf_conn *ct, |
| 2800 | struct nf_conntrack_helper *helper, |
| 2801 | struct nf_conntrack_tuple *tuple, |
| 2802 | struct nf_conntrack_tuple *mask) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2803 | { |
Pablo Neira Ayuso | b8c5e52 | 2012-02-05 03:21:12 +0100 | [diff] [blame] | 2804 | u_int32_t class = 0; |
Pablo Neira Ayuso | 0ef71ee | 2013-08-07 19:12:34 +0200 | [diff] [blame] | 2805 | struct nf_conntrack_expect *exp; |
| 2806 | struct nf_conn_help *help; |
| 2807 | int err; |
Pablo Neira Ayuso | 660fdb2 | 2012-02-05 02:34:16 +0100 | [diff] [blame] | 2808 | |
Pablo Neira Ayuso | b8c5e52 | 2012-02-05 03:21:12 +0100 | [diff] [blame] | 2809 | if (cda[CTA_EXPECT_CLASS] && helper) { |
| 2810 | class = ntohl(nla_get_be32(cda[CTA_EXPECT_CLASS])); |
Pablo Neira Ayuso | 0ef71ee | 2013-08-07 19:12:34 +0200 | [diff] [blame] | 2811 | if (class > helper->expect_class_max) |
| 2812 | return ERR_PTR(-EINVAL); |
Pablo Neira Ayuso | b8c5e52 | 2012-02-05 03:21:12 +0100 | [diff] [blame] | 2813 | } |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 2814 | exp = nf_ct_expect_alloc(ct); |
Pablo Neira Ayuso | 0ef71ee | 2013-08-07 19:12:34 +0200 | [diff] [blame] | 2815 | if (!exp) |
| 2816 | return ERR_PTR(-ENOMEM); |
| 2817 | |
Pablo Neira Ayuso | bc01befd | 2010-09-28 21:06:34 +0200 | [diff] [blame] | 2818 | help = nfct_help(ct); |
| 2819 | if (!help) { |
| 2820 | if (!cda[CTA_EXPECT_TIMEOUT]) { |
| 2821 | err = -EINVAL; |
Jesper Juhl | 1310b955 | 2012-12-26 11:49:40 +0000 | [diff] [blame] | 2822 | goto err_out; |
Pablo Neira Ayuso | bc01befd | 2010-09-28 21:06:34 +0200 | [diff] [blame] | 2823 | } |
| 2824 | exp->timeout.expires = |
| 2825 | jiffies + ntohl(nla_get_be32(cda[CTA_EXPECT_TIMEOUT])) * HZ; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 2826 | |
Pablo Neira Ayuso | bc01befd | 2010-09-28 21:06:34 +0200 | [diff] [blame] | 2827 | exp->flags = NF_CT_EXPECT_USERSPACE; |
| 2828 | if (cda[CTA_EXPECT_FLAGS]) { |
| 2829 | exp->flags |= |
| 2830 | ntohl(nla_get_be32(cda[CTA_EXPECT_FLAGS])); |
| 2831 | } |
| 2832 | } else { |
| 2833 | if (cda[CTA_EXPECT_FLAGS]) { |
| 2834 | exp->flags = ntohl(nla_get_be32(cda[CTA_EXPECT_FLAGS])); |
| 2835 | exp->flags &= ~NF_CT_EXPECT_USERSPACE; |
| 2836 | } else |
| 2837 | exp->flags = 0; |
| 2838 | } |
Pablo Neira Ayuso | 544d5c7 | 2012-02-05 03:44:51 +0100 | [diff] [blame] | 2839 | if (cda[CTA_EXPECT_FN]) { |
| 2840 | const char *name = nla_data(cda[CTA_EXPECT_FN]); |
| 2841 | struct nf_ct_helper_expectfn *expfn; |
| 2842 | |
| 2843 | expfn = nf_ct_helper_expectfn_find_by_name(name); |
| 2844 | if (expfn == NULL) { |
| 2845 | err = -EINVAL; |
| 2846 | goto err_out; |
| 2847 | } |
| 2848 | exp->expectfn = expfn->expectfn; |
| 2849 | } else |
| 2850 | exp->expectfn = NULL; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2851 | |
Pablo Neira Ayuso | b8c5e52 | 2012-02-05 03:21:12 +0100 | [diff] [blame] | 2852 | exp->class = class; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2853 | exp->master = ct; |
Pablo Neira Ayuso | 660fdb2 | 2012-02-05 02:34:16 +0100 | [diff] [blame] | 2854 | exp->helper = helper; |
Pablo Neira Ayuso | 0ef71ee | 2013-08-07 19:12:34 +0200 | [diff] [blame] | 2855 | exp->tuple = *tuple; |
| 2856 | exp->mask.src.u3 = mask->src.u3; |
| 2857 | exp->mask.src.u.all = mask->src.u.all; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2858 | |
Pablo Neira Ayuso | 076a0ca | 2012-02-05 03:41:52 +0100 | [diff] [blame] | 2859 | if (cda[CTA_EXPECT_NAT]) { |
| 2860 | err = ctnetlink_parse_expect_nat(cda[CTA_EXPECT_NAT], |
Pablo Neira Ayuso | 0ef71ee | 2013-08-07 19:12:34 +0200 | [diff] [blame] | 2861 | exp, nf_ct_l3num(ct)); |
Pablo Neira Ayuso | 076a0ca | 2012-02-05 03:41:52 +0100 | [diff] [blame] | 2862 | if (err < 0) |
| 2863 | goto err_out; |
| 2864 | } |
Pablo Neira Ayuso | 0ef71ee | 2013-08-07 19:12:34 +0200 | [diff] [blame] | 2865 | return exp; |
Pablo Neira Ayuso | 076a0ca | 2012-02-05 03:41:52 +0100 | [diff] [blame] | 2866 | err_out: |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 2867 | nf_ct_expect_put(exp); |
Pablo Neira Ayuso | 0ef71ee | 2013-08-07 19:12:34 +0200 | [diff] [blame] | 2868 | return ERR_PTR(err); |
| 2869 | } |
| 2870 | |
| 2871 | static int |
| 2872 | ctnetlink_create_expect(struct net *net, u16 zone, |
| 2873 | const struct nlattr * const cda[], |
| 2874 | u_int8_t u3, u32 portid, int report) |
| 2875 | { |
| 2876 | struct nf_conntrack_tuple tuple, mask, master_tuple; |
| 2877 | struct nf_conntrack_tuple_hash *h = NULL; |
| 2878 | struct nf_conntrack_helper *helper = NULL; |
| 2879 | struct nf_conntrack_expect *exp; |
| 2880 | struct nf_conn *ct; |
| 2881 | int err; |
| 2882 | |
| 2883 | /* caller guarantees that those three CTA_EXPECT_* exist */ |
| 2884 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); |
| 2885 | if (err < 0) |
| 2886 | return err; |
| 2887 | err = ctnetlink_parse_tuple(cda, &mask, CTA_EXPECT_MASK, u3); |
| 2888 | if (err < 0) |
| 2889 | return err; |
| 2890 | err = ctnetlink_parse_tuple(cda, &master_tuple, CTA_EXPECT_MASTER, u3); |
| 2891 | if (err < 0) |
| 2892 | return err; |
| 2893 | |
| 2894 | /* Look for master conntrack of this expectation */ |
| 2895 | h = nf_conntrack_find_get(net, zone, &master_tuple); |
| 2896 | if (!h) |
| 2897 | return -ENOENT; |
| 2898 | ct = nf_ct_tuplehash_to_ctrack(h); |
| 2899 | |
| 2900 | if (cda[CTA_EXPECT_HELP_NAME]) { |
| 2901 | const char *helpname = nla_data(cda[CTA_EXPECT_HELP_NAME]); |
| 2902 | |
| 2903 | helper = __nf_conntrack_helper_find(helpname, u3, |
| 2904 | nf_ct_protonum(ct)); |
| 2905 | if (helper == NULL) { |
| 2906 | #ifdef CONFIG_MODULES |
| 2907 | if (request_module("nfct-helper-%s", helpname) < 0) { |
| 2908 | err = -EOPNOTSUPP; |
| 2909 | goto err_ct; |
| 2910 | } |
| 2911 | helper = __nf_conntrack_helper_find(helpname, u3, |
| 2912 | nf_ct_protonum(ct)); |
| 2913 | if (helper) { |
| 2914 | err = -EAGAIN; |
| 2915 | goto err_ct; |
| 2916 | } |
| 2917 | #endif |
| 2918 | err = -EOPNOTSUPP; |
| 2919 | goto err_ct; |
| 2920 | } |
| 2921 | } |
| 2922 | |
| 2923 | exp = ctnetlink_alloc_expect(cda, ct, helper, &tuple, &mask); |
| 2924 | if (IS_ERR(exp)) { |
| 2925 | err = PTR_ERR(exp); |
| 2926 | goto err_ct; |
| 2927 | } |
| 2928 | |
| 2929 | err = nf_ct_expect_related_report(exp, portid, report); |
| 2930 | if (err < 0) |
| 2931 | goto err_exp; |
| 2932 | |
| 2933 | return 0; |
| 2934 | err_exp: |
| 2935 | nf_ct_expect_put(exp); |
| 2936 | err_ct: |
| 2937 | nf_ct_put(ct); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2938 | return err; |
| 2939 | } |
| 2940 | |
| 2941 | static int |
| 2942 | ctnetlink_new_expect(struct sock *ctnl, struct sk_buff *skb, |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 2943 | const struct nlmsghdr *nlh, |
| 2944 | const struct nlattr * const cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2945 | { |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 2946 | struct net *net = sock_net(ctnl); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2947 | struct nf_conntrack_tuple tuple; |
| 2948 | struct nf_conntrack_expect *exp; |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 2949 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2950 | u_int8_t u3 = nfmsg->nfgen_family; |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 2951 | u16 zone; |
| 2952 | int err; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2953 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2954 | if (!cda[CTA_EXPECT_TUPLE] |
| 2955 | || !cda[CTA_EXPECT_MASK] |
| 2956 | || !cda[CTA_EXPECT_MASTER]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2957 | return -EINVAL; |
| 2958 | |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 2959 | err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone); |
| 2960 | if (err < 0) |
| 2961 | return err; |
| 2962 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2963 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); |
| 2964 | if (err < 0) |
| 2965 | return err; |
| 2966 | |
Patrick McHardy | f8ba1af | 2008-01-31 04:38:58 -0800 | [diff] [blame] | 2967 | spin_lock_bh(&nf_conntrack_lock); |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 2968 | exp = __nf_ct_expect_find(net, zone, &tuple); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2969 | |
| 2970 | if (!exp) { |
Patrick McHardy | f8ba1af | 2008-01-31 04:38:58 -0800 | [diff] [blame] | 2971 | spin_unlock_bh(&nf_conntrack_lock); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2972 | err = -ENOENT; |
Pablo Neira Ayuso | 19abb7b | 2008-11-18 11:56:20 +0100 | [diff] [blame] | 2973 | if (nlh->nlmsg_flags & NLM_F_CREATE) { |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 2974 | err = ctnetlink_create_expect(net, zone, cda, |
Pablo Neira Ayuso | 19abb7b | 2008-11-18 11:56:20 +0100 | [diff] [blame] | 2975 | u3, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2976 | NETLINK_CB(skb).portid, |
Pablo Neira Ayuso | 19abb7b | 2008-11-18 11:56:20 +0100 | [diff] [blame] | 2977 | nlmsg_report(nlh)); |
| 2978 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2979 | return err; |
| 2980 | } |
| 2981 | |
| 2982 | err = -EEXIST; |
| 2983 | if (!(nlh->nlmsg_flags & NLM_F_EXCL)) |
| 2984 | err = ctnetlink_change_expect(exp, cda); |
Patrick McHardy | f8ba1af | 2008-01-31 04:38:58 -0800 | [diff] [blame] | 2985 | spin_unlock_bh(&nf_conntrack_lock); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2986 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2987 | return err; |
| 2988 | } |
| 2989 | |
Pablo Neira Ayuso | 392025f | 2012-06-26 20:27:09 +0200 | [diff] [blame] | 2990 | static int |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2991 | 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] | 2992 | const struct ip_conntrack_stat *st) |
| 2993 | { |
| 2994 | struct nlmsghdr *nlh; |
| 2995 | struct nfgenmsg *nfmsg; |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2996 | unsigned int flags = portid ? NLM_F_MULTI : 0, event; |
Pablo Neira Ayuso | 392025f | 2012-06-26 20:27:09 +0200 | [diff] [blame] | 2997 | |
| 2998 | event = (NFNL_SUBSYS_CTNETLINK << 8 | IPCTNL_MSG_EXP_GET_STATS_CPU); |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2999 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags); |
Pablo Neira Ayuso | 392025f | 2012-06-26 20:27:09 +0200 | [diff] [blame] | 3000 | if (nlh == NULL) |
| 3001 | goto nlmsg_failure; |
| 3002 | |
| 3003 | nfmsg = nlmsg_data(nlh); |
| 3004 | nfmsg->nfgen_family = AF_UNSPEC; |
| 3005 | nfmsg->version = NFNETLINK_V0; |
| 3006 | nfmsg->res_id = htons(cpu); |
| 3007 | |
| 3008 | if (nla_put_be32(skb, CTA_STATS_EXP_NEW, htonl(st->expect_new)) || |
| 3009 | nla_put_be32(skb, CTA_STATS_EXP_CREATE, htonl(st->expect_create)) || |
| 3010 | nla_put_be32(skb, CTA_STATS_EXP_DELETE, htonl(st->expect_delete))) |
| 3011 | goto nla_put_failure; |
| 3012 | |
| 3013 | nlmsg_end(skb, nlh); |
| 3014 | return skb->len; |
| 3015 | |
| 3016 | nla_put_failure: |
| 3017 | nlmsg_failure: |
| 3018 | nlmsg_cancel(skb, nlh); |
| 3019 | return -1; |
| 3020 | } |
| 3021 | |
| 3022 | static int |
| 3023 | ctnetlink_exp_stat_cpu_dump(struct sk_buff *skb, struct netlink_callback *cb) |
| 3024 | { |
| 3025 | int cpu; |
| 3026 | struct net *net = sock_net(skb->sk); |
| 3027 | |
| 3028 | if (cb->args[0] == nr_cpu_ids) |
| 3029 | return 0; |
| 3030 | |
| 3031 | for (cpu = cb->args[0]; cpu < nr_cpu_ids; cpu++) { |
| 3032 | const struct ip_conntrack_stat *st; |
| 3033 | |
| 3034 | if (!cpu_possible(cpu)) |
| 3035 | continue; |
| 3036 | |
| 3037 | st = per_cpu_ptr(net->ct.stat, cpu); |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 3038 | 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] | 3039 | cb->nlh->nlmsg_seq, |
| 3040 | cpu, st) < 0) |
| 3041 | break; |
| 3042 | } |
| 3043 | cb->args[0] = cpu; |
| 3044 | |
| 3045 | return skb->len; |
| 3046 | } |
| 3047 | |
| 3048 | static int |
| 3049 | ctnetlink_stat_exp_cpu(struct sock *ctnl, struct sk_buff *skb, |
| 3050 | const struct nlmsghdr *nlh, |
| 3051 | const struct nlattr * const cda[]) |
| 3052 | { |
| 3053 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
| 3054 | struct netlink_dump_control c = { |
| 3055 | .dump = ctnetlink_exp_stat_cpu_dump, |
| 3056 | }; |
| 3057 | return netlink_dump_start(ctnl, skb, nlh, &c); |
| 3058 | } |
| 3059 | |
| 3060 | return 0; |
| 3061 | } |
| 3062 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3063 | #ifdef CONFIG_NF_CONNTRACK_EVENTS |
Pablo Neira Ayuso | e34d5c1 | 2009-06-03 10:32:06 +0200 | [diff] [blame] | 3064 | static struct nf_ct_event_notifier ctnl_notifier = { |
| 3065 | .fcn = ctnetlink_conntrack_event, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3066 | }; |
| 3067 | |
Pablo Neira Ayuso | e34d5c1 | 2009-06-03 10:32:06 +0200 | [diff] [blame] | 3068 | static struct nf_exp_event_notifier ctnl_notifier_exp = { |
| 3069 | .fcn = ctnetlink_expect_event, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3070 | }; |
| 3071 | #endif |
| 3072 | |
Patrick McHardy | 7c8d4cb | 2007-09-28 14:15:45 -0700 | [diff] [blame] | 3073 | static const struct nfnl_callback ctnl_cb[IPCTNL_MSG_MAX] = { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3074 | [IPCTNL_MSG_CT_NEW] = { .call = ctnetlink_new_conntrack, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 3075 | .attr_count = CTA_MAX, |
| 3076 | .policy = ct_nla_policy }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3077 | [IPCTNL_MSG_CT_GET] = { .call = ctnetlink_get_conntrack, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 3078 | .attr_count = CTA_MAX, |
| 3079 | .policy = ct_nla_policy }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3080 | [IPCTNL_MSG_CT_DELETE] = { .call = ctnetlink_del_conntrack, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 3081 | .attr_count = CTA_MAX, |
| 3082 | .policy = ct_nla_policy }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3083 | [IPCTNL_MSG_CT_GET_CTRZERO] = { .call = ctnetlink_get_conntrack, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 3084 | .attr_count = CTA_MAX, |
| 3085 | .policy = ct_nla_policy }, |
Pablo Neira Ayuso | 392025f | 2012-06-26 20:27:09 +0200 | [diff] [blame] | 3086 | [IPCTNL_MSG_CT_GET_STATS_CPU] = { .call = ctnetlink_stat_ct_cpu }, |
| 3087 | [IPCTNL_MSG_CT_GET_STATS] = { .call = ctnetlink_stat_ct }, |
Pablo Neira Ayuso | d871bef | 2012-11-27 14:49:42 +0100 | [diff] [blame] | 3088 | [IPCTNL_MSG_CT_GET_DYING] = { .call = ctnetlink_get_ct_dying }, |
| 3089 | [IPCTNL_MSG_CT_GET_UNCONFIRMED] = { .call = ctnetlink_get_ct_unconfirmed }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3090 | }; |
| 3091 | |
Patrick McHardy | 7c8d4cb | 2007-09-28 14:15:45 -0700 | [diff] [blame] | 3092 | 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] | 3093 | [IPCTNL_MSG_EXP_GET] = { .call = ctnetlink_get_expect, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 3094 | .attr_count = CTA_EXPECT_MAX, |
| 3095 | .policy = exp_nla_policy }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3096 | [IPCTNL_MSG_EXP_NEW] = { .call = ctnetlink_new_expect, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 3097 | .attr_count = CTA_EXPECT_MAX, |
| 3098 | .policy = exp_nla_policy }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3099 | [IPCTNL_MSG_EXP_DELETE] = { .call = ctnetlink_del_expect, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 3100 | .attr_count = CTA_EXPECT_MAX, |
| 3101 | .policy = exp_nla_policy }, |
Pablo Neira Ayuso | 392025f | 2012-06-26 20:27:09 +0200 | [diff] [blame] | 3102 | [IPCTNL_MSG_EXP_GET_STATS_CPU] = { .call = ctnetlink_stat_exp_cpu }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3103 | }; |
| 3104 | |
Patrick McHardy | 7c8d4cb | 2007-09-28 14:15:45 -0700 | [diff] [blame] | 3105 | static const struct nfnetlink_subsystem ctnl_subsys = { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3106 | .name = "conntrack", |
| 3107 | .subsys_id = NFNL_SUBSYS_CTNETLINK, |
| 3108 | .cb_count = IPCTNL_MSG_MAX, |
| 3109 | .cb = ctnl_cb, |
| 3110 | }; |
| 3111 | |
Patrick McHardy | 7c8d4cb | 2007-09-28 14:15:45 -0700 | [diff] [blame] | 3112 | static const struct nfnetlink_subsystem ctnl_exp_subsys = { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3113 | .name = "conntrack_expect", |
| 3114 | .subsys_id = NFNL_SUBSYS_CTNETLINK_EXP, |
| 3115 | .cb_count = IPCTNL_MSG_EXP_MAX, |
| 3116 | .cb = ctnl_exp_cb, |
| 3117 | }; |
| 3118 | |
Patrick McHardy | d2483dd | 2006-12-02 22:06:05 -0800 | [diff] [blame] | 3119 | MODULE_ALIAS("ip_conntrack_netlink"); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3120 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK); |
Pablo Neira Ayuso | 34f9a2e | 2006-02-04 02:11:41 -0800 | [diff] [blame] | 3121 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK_EXP); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3122 | |
Pablo Neira Ayuso | 70e9942 | 2011-11-22 00:16:51 +0100 | [diff] [blame] | 3123 | static int __net_init ctnetlink_net_init(struct net *net) |
| 3124 | { |
| 3125 | #ifdef CONFIG_NF_CONNTRACK_EVENTS |
| 3126 | int ret; |
| 3127 | |
| 3128 | ret = nf_conntrack_register_notifier(net, &ctnl_notifier); |
| 3129 | if (ret < 0) { |
| 3130 | pr_err("ctnetlink_init: cannot register notifier.\n"); |
| 3131 | goto err_out; |
| 3132 | } |
| 3133 | |
| 3134 | ret = nf_ct_expect_register_notifier(net, &ctnl_notifier_exp); |
| 3135 | if (ret < 0) { |
| 3136 | pr_err("ctnetlink_init: cannot expect register notifier.\n"); |
| 3137 | goto err_unreg_notifier; |
| 3138 | } |
| 3139 | #endif |
| 3140 | return 0; |
| 3141 | |
| 3142 | #ifdef CONFIG_NF_CONNTRACK_EVENTS |
| 3143 | err_unreg_notifier: |
| 3144 | nf_conntrack_unregister_notifier(net, &ctnl_notifier); |
| 3145 | err_out: |
| 3146 | return ret; |
| 3147 | #endif |
| 3148 | } |
| 3149 | |
| 3150 | static void ctnetlink_net_exit(struct net *net) |
| 3151 | { |
| 3152 | #ifdef CONFIG_NF_CONNTRACK_EVENTS |
| 3153 | nf_ct_expect_unregister_notifier(net, &ctnl_notifier_exp); |
| 3154 | nf_conntrack_unregister_notifier(net, &ctnl_notifier); |
| 3155 | #endif |
| 3156 | } |
| 3157 | |
| 3158 | static void __net_exit ctnetlink_net_exit_batch(struct list_head *net_exit_list) |
| 3159 | { |
| 3160 | struct net *net; |
| 3161 | |
| 3162 | list_for_each_entry(net, net_exit_list, exit_list) |
| 3163 | ctnetlink_net_exit(net); |
| 3164 | } |
| 3165 | |
| 3166 | static struct pernet_operations ctnetlink_net_ops = { |
| 3167 | .init = ctnetlink_net_init, |
| 3168 | .exit_batch = ctnetlink_net_exit_batch, |
| 3169 | }; |
| 3170 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3171 | static int __init ctnetlink_init(void) |
| 3172 | { |
| 3173 | int ret; |
| 3174 | |
Stephen Hemminger | 654d0fb | 2010-05-13 15:02:08 +0200 | [diff] [blame] | 3175 | pr_info("ctnetlink v%s: registering with nfnetlink.\n", version); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3176 | ret = nfnetlink_subsys_register(&ctnl_subsys); |
| 3177 | if (ret < 0) { |
Stephen Hemminger | 654d0fb | 2010-05-13 15:02:08 +0200 | [diff] [blame] | 3178 | pr_err("ctnetlink_init: cannot register with nfnetlink.\n"); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3179 | goto err_out; |
| 3180 | } |
| 3181 | |
| 3182 | ret = nfnetlink_subsys_register(&ctnl_exp_subsys); |
| 3183 | if (ret < 0) { |
Stephen Hemminger | 654d0fb | 2010-05-13 15:02:08 +0200 | [diff] [blame] | 3184 | pr_err("ctnetlink_init: cannot register exp with nfnetlink.\n"); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3185 | goto err_unreg_subsys; |
| 3186 | } |
| 3187 | |
Julia Lawall | ef6acf6 | 2012-08-29 06:49:16 +0000 | [diff] [blame] | 3188 | ret = register_pernet_subsys(&ctnetlink_net_ops); |
| 3189 | if (ret < 0) { |
Pablo Neira Ayuso | 70e9942 | 2011-11-22 00:16:51 +0100 | [diff] [blame] | 3190 | pr_err("ctnetlink_init: cannot register pernet operations\n"); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3191 | goto err_unreg_exp_subsys; |
| 3192 | } |
Pablo Neira Ayuso | 7c62234 | 2012-06-19 02:10:57 +0200 | [diff] [blame] | 3193 | #ifdef CONFIG_NETFILTER_NETLINK_QUEUE_CT |
Pablo Neira Ayuso | 9cb0176 | 2012-06-07 12:13:39 +0200 | [diff] [blame] | 3194 | /* setup interaction between nf_queue and nf_conntrack_netlink. */ |
| 3195 | RCU_INIT_POINTER(nfq_ct_hook, &ctnetlink_nfqueue_hook); |
| 3196 | #endif |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3197 | return 0; |
| 3198 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3199 | err_unreg_exp_subsys: |
| 3200 | nfnetlink_subsys_unregister(&ctnl_exp_subsys); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3201 | err_unreg_subsys: |
| 3202 | nfnetlink_subsys_unregister(&ctnl_subsys); |
| 3203 | err_out: |
| 3204 | return ret; |
| 3205 | } |
| 3206 | |
| 3207 | static void __exit ctnetlink_exit(void) |
| 3208 | { |
Stephen Hemminger | 654d0fb | 2010-05-13 15:02:08 +0200 | [diff] [blame] | 3209 | pr_info("ctnetlink: unregistering from nfnetlink.\n"); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3210 | |
Pablo Neira Ayuso | 70e9942 | 2011-11-22 00:16:51 +0100 | [diff] [blame] | 3211 | unregister_pernet_subsys(&ctnetlink_net_ops); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3212 | nfnetlink_subsys_unregister(&ctnl_exp_subsys); |
| 3213 | nfnetlink_subsys_unregister(&ctnl_subsys); |
Pablo Neira Ayuso | 7c62234 | 2012-06-19 02:10:57 +0200 | [diff] [blame] | 3214 | #ifdef CONFIG_NETFILTER_NETLINK_QUEUE_CT |
Pablo Neira Ayuso | 9cb0176 | 2012-06-07 12:13:39 +0200 | [diff] [blame] | 3215 | RCU_INIT_POINTER(nfq_ct_hook, NULL); |
| 3216 | #endif |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3217 | } |
| 3218 | |
| 3219 | module_init(ctnetlink_init); |
| 3220 | module_exit(ctnetlink_exit); |