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> |
Florian Westphal | 1922476 | 2019-08-17 00:01:34 +0100 | [diff] [blame^] | 32 | #include <linux/siphash.h> |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 33 | |
| 34 | #include <linux/netfilter.h> |
Arnaldo Carvalho de Melo | dc5fc57 | 2007-03-25 23:06:12 -0700 | [diff] [blame] | 35 | #include <net/netlink.h> |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 36 | #include <net/sock.h> |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 37 | #include <net/netfilter/nf_conntrack.h> |
| 38 | #include <net/netfilter/nf_conntrack_core.h> |
Martin Josefsson | 77ab9cf | 2006-11-29 02:34:58 +0100 | [diff] [blame] | 39 | #include <net/netfilter/nf_conntrack_expect.h> |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 40 | #include <net/netfilter/nf_conntrack_helper.h> |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 41 | #include <net/netfilter/nf_conntrack_seqadj.h> |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 42 | #include <net/netfilter/nf_conntrack_l3proto.h> |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 43 | #include <net/netfilter/nf_conntrack_l4proto.h> |
Jozsef Kadlecsik | 5b1158e | 2006-12-02 22:07:13 -0800 | [diff] [blame] | 44 | #include <net/netfilter/nf_conntrack_tuple.h> |
Krzysztof Piotr Oledzki | 5840157 | 2008-07-21 10:01:34 -0700 | [diff] [blame] | 45 | #include <net/netfilter/nf_conntrack_acct.h> |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 46 | #include <net/netfilter/nf_conntrack_zones.h> |
Pablo Neira Ayuso | a992ca2 | 2011-01-19 16:00:07 +0100 | [diff] [blame] | 47 | #include <net/netfilter/nf_conntrack_timestamp.h> |
Florian Westphal | c539f01 | 2013-01-11 06:30:44 +0000 | [diff] [blame] | 48 | #include <net/netfilter/nf_conntrack_labels.h> |
Eric Leblond | b89bd0c | 2017-05-11 18:56:38 +0200 | [diff] [blame] | 49 | #include <net/netfilter/nf_conntrack_seqadj.h> |
| 50 | #include <net/netfilter/nf_conntrack_synproxy.h> |
Jozsef Kadlecsik | 5b1158e | 2006-12-02 22:07:13 -0800 | [diff] [blame] | 51 | #ifdef CONFIG_NF_NAT_NEEDED |
| 52 | #include <net/netfilter/nf_nat_core.h> |
Patrick McHardy | c7232c9 | 2012-08-26 19:14:06 +0200 | [diff] [blame] | 53 | #include <net/netfilter/nf_nat_l4proto.h> |
Pablo Neira Ayuso | 8c88f87 | 2012-06-07 13:31:25 +0200 | [diff] [blame] | 54 | #include <net/netfilter/nf_nat_helper.h> |
Jozsef Kadlecsik | 5b1158e | 2006-12-02 22:07:13 -0800 | [diff] [blame] | 55 | #endif |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 56 | |
| 57 | #include <linux/netfilter/nfnetlink.h> |
| 58 | #include <linux/netfilter/nfnetlink_conntrack.h> |
| 59 | |
| 60 | MODULE_LICENSE("GPL"); |
| 61 | |
Harald Welte | dc808fe | 2006-03-20 17:56:32 -0800 | [diff] [blame] | 62 | static char __initdata version[] = "0.93"; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 63 | |
Pablo Neira Ayuso | 4054ff4 | 2016-04-12 23:32:34 +0200 | [diff] [blame] | 64 | static int ctnetlink_dump_tuples_proto(struct sk_buff *skb, |
| 65 | const struct nf_conntrack_tuple *tuple, |
| 66 | struct nf_conntrack_l4proto *l4proto) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 67 | { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 68 | int ret = 0; |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 69 | struct nlattr *nest_parms; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 70 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 71 | nest_parms = nla_nest_start(skb, CTA_TUPLE_PROTO | NLA_F_NESTED); |
| 72 | if (!nest_parms) |
| 73 | goto nla_put_failure; |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 74 | if (nla_put_u8(skb, CTA_PROTO_NUM, tuple->dst.protonum)) |
| 75 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 76 | |
Patrick McHardy | fdf7083 | 2007-09-28 14:37:41 -0700 | [diff] [blame] | 77 | if (likely(l4proto->tuple_to_nlattr)) |
| 78 | ret = l4proto->tuple_to_nlattr(skb, tuple); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 79 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 80 | nla_nest_end(skb, nest_parms); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 81 | |
| 82 | return ret; |
| 83 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 84 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 85 | return -1; |
| 86 | } |
| 87 | |
Pablo Neira Ayuso | 4054ff4 | 2016-04-12 23:32:34 +0200 | [diff] [blame] | 88 | static int ctnetlink_dump_tuples_ip(struct sk_buff *skb, |
| 89 | const struct nf_conntrack_tuple *tuple, |
| 90 | struct nf_conntrack_l3proto *l3proto) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 91 | { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 92 | int ret = 0; |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 93 | struct nlattr *nest_parms; |
| 94 | |
| 95 | nest_parms = nla_nest_start(skb, CTA_TUPLE_IP | NLA_F_NESTED); |
| 96 | if (!nest_parms) |
| 97 | goto nla_put_failure; |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 98 | |
Patrick McHardy | fdf7083 | 2007-09-28 14:37:41 -0700 | [diff] [blame] | 99 | if (likely(l3proto->tuple_to_nlattr)) |
| 100 | ret = l3proto->tuple_to_nlattr(skb, tuple); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 101 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 102 | nla_nest_end(skb, nest_parms); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 103 | |
| 104 | return ret; |
| 105 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 106 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 107 | return -1; |
| 108 | } |
| 109 | |
Pablo Neira Ayuso | 4054ff4 | 2016-04-12 23:32:34 +0200 | [diff] [blame] | 110 | static int ctnetlink_dump_tuples(struct sk_buff *skb, |
| 111 | const struct nf_conntrack_tuple *tuple) |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 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 | |
Pablo Neira Ayuso | 4054ff4 | 2016-04-12 23:32:34 +0200 | [diff] [blame] | 130 | static int ctnetlink_dump_zone_id(struct sk_buff *skb, int attrtype, |
| 131 | const struct nf_conntrack_zone *zone, int dir) |
Daniel Borkmann | deedb59 | 2015-08-14 16:03:39 +0200 | [diff] [blame] | 132 | { |
| 133 | if (zone->id == NF_CT_DEFAULT_ZONE_ID || zone->dir != dir) |
| 134 | return 0; |
| 135 | if (nla_put_be16(skb, attrtype, htons(zone->id))) |
| 136 | goto nla_put_failure; |
| 137 | return 0; |
| 138 | |
| 139 | nla_put_failure: |
| 140 | return -1; |
| 141 | } |
| 142 | |
Pablo Neira Ayuso | 4054ff4 | 2016-04-12 23:32:34 +0200 | [diff] [blame] | 143 | static int ctnetlink_dump_status(struct sk_buff *skb, const struct nf_conn *ct) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 144 | { |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 145 | if (nla_put_be32(skb, CTA_STATUS, htonl(ct->status))) |
| 146 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 147 | return 0; |
| 148 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 149 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 150 | return -1; |
| 151 | } |
| 152 | |
Pablo Neira Ayuso | 4054ff4 | 2016-04-12 23:32:34 +0200 | [diff] [blame] | 153 | static int ctnetlink_dump_timeout(struct sk_buff *skb, const struct nf_conn *ct) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 154 | { |
Florian Westphal | d0b35b9 | 2016-08-03 02:45:07 +0200 | [diff] [blame] | 155 | long timeout = nf_ct_expires(ct) / HZ; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 156 | |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 157 | if (nla_put_be32(skb, CTA_TIMEOUT, htonl(timeout))) |
| 158 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 159 | return 0; |
| 160 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 161 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 162 | return -1; |
| 163 | } |
| 164 | |
Pablo Neira Ayuso | 4054ff4 | 2016-04-12 23:32:34 +0200 | [diff] [blame] | 165 | static int ctnetlink_dump_protoinfo(struct sk_buff *skb, struct nf_conn *ct) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 166 | { |
Patrick McHardy | 5e8fbe2 | 2008-04-14 11:15:52 +0200 | [diff] [blame] | 167 | struct nf_conntrack_l4proto *l4proto; |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 168 | struct nlattr *nest_proto; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 169 | int ret; |
| 170 | |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 171 | l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct)); |
| 172 | if (!l4proto->to_nlattr) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 173 | return 0; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 174 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 175 | nest_proto = nla_nest_start(skb, CTA_PROTOINFO | NLA_F_NESTED); |
| 176 | if (!nest_proto) |
| 177 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 178 | |
Patrick McHardy | fdf7083 | 2007-09-28 14:37:41 -0700 | [diff] [blame] | 179 | ret = l4proto->to_nlattr(skb, nest_proto, ct); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 180 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 181 | nla_nest_end(skb, nest_proto); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 182 | |
| 183 | return ret; |
| 184 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 185 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 186 | return -1; |
| 187 | } |
| 188 | |
Pablo Neira Ayuso | 4054ff4 | 2016-04-12 23:32:34 +0200 | [diff] [blame] | 189 | static int ctnetlink_dump_helpinfo(struct sk_buff *skb, |
| 190 | const struct nf_conn *ct) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 191 | { |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 192 | struct nlattr *nest_helper; |
Harald Welte | dc808fe | 2006-03-20 17:56:32 -0800 | [diff] [blame] | 193 | const struct nf_conn_help *help = nfct_help(ct); |
Patrick McHarrdy | 3c158f7 | 2007-06-05 12:55:27 -0700 | [diff] [blame] | 194 | struct nf_conntrack_helper *helper; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 195 | |
Patrick McHarrdy | 3c158f7 | 2007-06-05 12:55:27 -0700 | [diff] [blame] | 196 | if (!help) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 197 | return 0; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 198 | |
Patrick McHarrdy | 3c158f7 | 2007-06-05 12:55:27 -0700 | [diff] [blame] | 199 | helper = rcu_dereference(help->helper); |
| 200 | if (!helper) |
| 201 | goto out; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 202 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 203 | nest_helper = nla_nest_start(skb, CTA_HELP | NLA_F_NESTED); |
| 204 | if (!nest_helper) |
| 205 | goto nla_put_failure; |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 206 | if (nla_put_string(skb, CTA_HELP_NAME, helper->name)) |
| 207 | goto nla_put_failure; |
Patrick McHarrdy | 3c158f7 | 2007-06-05 12:55:27 -0700 | [diff] [blame] | 208 | |
Patrick McHardy | fdf7083 | 2007-09-28 14:37:41 -0700 | [diff] [blame] | 209 | if (helper->to_nlattr) |
| 210 | helper->to_nlattr(skb, ct); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 211 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 212 | nla_nest_end(skb, nest_helper); |
Patrick McHarrdy | 3c158f7 | 2007-06-05 12:55:27 -0700 | [diff] [blame] | 213 | out: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 214 | return 0; |
| 215 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 216 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 217 | return -1; |
| 218 | } |
| 219 | |
Ilpo Järvinen | bb5cf80 | 2008-01-05 23:11:31 -0800 | [diff] [blame] | 220 | static int |
Holger Eitzenberger | 4542fa4 | 2013-09-26 17:31:52 +0200 | [diff] [blame] | 221 | dump_counters(struct sk_buff *skb, struct nf_conn_acct *acct, |
| 222 | enum ip_conntrack_dir dir, int type) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 223 | { |
Holger Eitzenberger | 4542fa4 | 2013-09-26 17:31:52 +0200 | [diff] [blame] | 224 | enum ctattr_type attr = dir ? CTA_COUNTERS_REPLY: CTA_COUNTERS_ORIG; |
| 225 | struct nf_conn_counter *counter = acct->counter; |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 226 | struct nlattr *nest_count; |
Holger Eitzenberger | 4542fa4 | 2013-09-26 17:31:52 +0200 | [diff] [blame] | 227 | u64 pkts, bytes; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 228 | |
Holger Eitzenberger | 4542fa4 | 2013-09-26 17:31:52 +0200 | [diff] [blame] | 229 | if (type == IPCTNL_MSG_CT_GET_CTRZERO) { |
| 230 | pkts = atomic64_xchg(&counter[dir].packets, 0); |
| 231 | bytes = atomic64_xchg(&counter[dir].bytes, 0); |
| 232 | } else { |
| 233 | pkts = atomic64_read(&counter[dir].packets); |
| 234 | bytes = atomic64_read(&counter[dir].bytes); |
| 235 | } |
| 236 | |
| 237 | nest_count = nla_nest_start(skb, attr | NLA_F_NESTED); |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 238 | if (!nest_count) |
| 239 | goto nla_put_failure; |
| 240 | |
Nicolas Dichtel | b46f6de | 2016-04-22 17:31:18 +0200 | [diff] [blame] | 241 | if (nla_put_be64(skb, CTA_COUNTERS_PACKETS, cpu_to_be64(pkts), |
| 242 | CTA_COUNTERS_PAD) || |
| 243 | nla_put_be64(skb, CTA_COUNTERS_BYTES, cpu_to_be64(bytes), |
| 244 | CTA_COUNTERS_PAD)) |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 245 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 246 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 247 | nla_nest_end(skb, nest_count); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 248 | |
| 249 | return 0; |
| 250 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 251 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 252 | return -1; |
| 253 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 254 | |
Pablo Neira Ayuso | a992ca2 | 2011-01-19 16:00:07 +0100 | [diff] [blame] | 255 | static int |
Holger Eitzenberger | 4542fa4 | 2013-09-26 17:31:52 +0200 | [diff] [blame] | 256 | ctnetlink_dump_acct(struct sk_buff *skb, const struct nf_conn *ct, int type) |
Pablo Neira Ayuso | 80e60e6 | 2011-12-24 14:11:39 +0100 | [diff] [blame] | 257 | { |
Holger Eitzenberger | 4542fa4 | 2013-09-26 17:31:52 +0200 | [diff] [blame] | 258 | struct nf_conn_acct *acct = nf_conn_acct_find(ct); |
Pablo Neira Ayuso | 80e60e6 | 2011-12-24 14:11:39 +0100 | [diff] [blame] | 259 | |
Pablo Neira Ayuso | 80e60e6 | 2011-12-24 14:11:39 +0100 | [diff] [blame] | 260 | if (!acct) |
| 261 | return 0; |
| 262 | |
Holger Eitzenberger | 4542fa4 | 2013-09-26 17:31:52 +0200 | [diff] [blame] | 263 | if (dump_counters(skb, acct, IP_CT_DIR_ORIGINAL, type) < 0) |
| 264 | return -1; |
| 265 | if (dump_counters(skb, acct, IP_CT_DIR_REPLY, type) < 0) |
| 266 | return -1; |
| 267 | |
| 268 | return 0; |
Pablo Neira Ayuso | 80e60e6 | 2011-12-24 14:11:39 +0100 | [diff] [blame] | 269 | } |
| 270 | |
| 271 | static int |
Pablo Neira Ayuso | a992ca2 | 2011-01-19 16:00:07 +0100 | [diff] [blame] | 272 | ctnetlink_dump_timestamp(struct sk_buff *skb, const struct nf_conn *ct) |
| 273 | { |
| 274 | struct nlattr *nest_count; |
| 275 | const struct nf_conn_tstamp *tstamp; |
| 276 | |
| 277 | tstamp = nf_conn_tstamp_find(ct); |
| 278 | if (!tstamp) |
| 279 | return 0; |
| 280 | |
| 281 | nest_count = nla_nest_start(skb, CTA_TIMESTAMP | NLA_F_NESTED); |
| 282 | if (!nest_count) |
| 283 | goto nla_put_failure; |
| 284 | |
Nicolas Dichtel | b46f6de | 2016-04-22 17:31:18 +0200 | [diff] [blame] | 285 | if (nla_put_be64(skb, CTA_TIMESTAMP_START, cpu_to_be64(tstamp->start), |
| 286 | CTA_TIMESTAMP_PAD) || |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 287 | (tstamp->stop != 0 && nla_put_be64(skb, CTA_TIMESTAMP_STOP, |
Nicolas Dichtel | b46f6de | 2016-04-22 17:31:18 +0200 | [diff] [blame] | 288 | cpu_to_be64(tstamp->stop), |
| 289 | CTA_TIMESTAMP_PAD))) |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 290 | goto nla_put_failure; |
Pablo Neira Ayuso | a992ca2 | 2011-01-19 16:00:07 +0100 | [diff] [blame] | 291 | nla_nest_end(skb, nest_count); |
| 292 | |
| 293 | return 0; |
| 294 | |
| 295 | nla_put_failure: |
| 296 | return -1; |
| 297 | } |
| 298 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 299 | #ifdef CONFIG_NF_CONNTRACK_MARK |
Pablo Neira Ayuso | 4054ff4 | 2016-04-12 23:32:34 +0200 | [diff] [blame] | 300 | static int ctnetlink_dump_mark(struct sk_buff *skb, const struct nf_conn *ct) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 301 | { |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 302 | if (nla_put_be32(skb, CTA_MARK, htonl(ct->mark))) |
| 303 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 304 | return 0; |
| 305 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 306 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 307 | return -1; |
| 308 | } |
| 309 | #else |
| 310 | #define ctnetlink_dump_mark(a, b) (0) |
| 311 | #endif |
| 312 | |
Pablo Neira Ayuso | 37fccd8 | 2007-12-17 22:28:41 -0800 | [diff] [blame] | 313 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
Pablo Neira Ayuso | 4054ff4 | 2016-04-12 23:32:34 +0200 | [diff] [blame] | 314 | static int 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] | 315 | { |
Eric Paris | 1cc6324 | 2010-10-13 16:24:54 -0400 | [diff] [blame] | 316 | struct nlattr *nest_secctx; |
| 317 | int len, ret; |
| 318 | char *secctx; |
Pablo Neira Ayuso | 37fccd8 | 2007-12-17 22:28:41 -0800 | [diff] [blame] | 319 | |
Eric Paris | 1cc6324 | 2010-10-13 16:24:54 -0400 | [diff] [blame] | 320 | ret = security_secid_to_secctx(ct->secmark, &secctx, &len); |
| 321 | if (ret) |
Pablo Neira Ayuso | cba85b5 | 2011-01-06 11:25:00 -0800 | [diff] [blame] | 322 | return 0; |
Eric Paris | 1cc6324 | 2010-10-13 16:24:54 -0400 | [diff] [blame] | 323 | |
| 324 | ret = -1; |
| 325 | nest_secctx = nla_nest_start(skb, CTA_SECCTX | NLA_F_NESTED); |
| 326 | if (!nest_secctx) |
| 327 | goto nla_put_failure; |
| 328 | |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 329 | if (nla_put_string(skb, CTA_SECCTX_NAME, secctx)) |
| 330 | goto nla_put_failure; |
Eric Paris | 1cc6324 | 2010-10-13 16:24:54 -0400 | [diff] [blame] | 331 | nla_nest_end(skb, nest_secctx); |
| 332 | |
| 333 | ret = 0; |
Pablo Neira Ayuso | 37fccd8 | 2007-12-17 22:28:41 -0800 | [diff] [blame] | 334 | nla_put_failure: |
Eric Paris | 1cc6324 | 2010-10-13 16:24:54 -0400 | [diff] [blame] | 335 | security_release_secctx(secctx, len); |
| 336 | return ret; |
Pablo Neira Ayuso | 37fccd8 | 2007-12-17 22:28:41 -0800 | [diff] [blame] | 337 | } |
| 338 | #else |
Eric Paris | 1cc6324 | 2010-10-13 16:24:54 -0400 | [diff] [blame] | 339 | #define ctnetlink_dump_secctx(a, b) (0) |
Pablo Neira Ayuso | 37fccd8 | 2007-12-17 22:28:41 -0800 | [diff] [blame] | 340 | #endif |
| 341 | |
Florian Westphal | 0ceabd8 | 2013-01-11 06:30:45 +0000 | [diff] [blame] | 342 | #ifdef CONFIG_NF_CONNTRACK_LABELS |
Pablo Neira Ayuso | 4a96300 | 2016-04-15 12:24:57 +0200 | [diff] [blame] | 343 | static inline int ctnetlink_label_size(const struct nf_conn *ct) |
Florian Westphal | 0ceabd8 | 2013-01-11 06:30:45 +0000 | [diff] [blame] | 344 | { |
| 345 | struct nf_conn_labels *labels = nf_ct_labels_find(ct); |
| 346 | |
| 347 | if (!labels) |
| 348 | return 0; |
Florian Westphal | 2301401 | 2016-07-21 12:51:16 +0200 | [diff] [blame] | 349 | return nla_total_size(sizeof(labels->bits)); |
Florian Westphal | 0ceabd8 | 2013-01-11 06:30:45 +0000 | [diff] [blame] | 350 | } |
| 351 | |
| 352 | static int |
| 353 | ctnetlink_dump_labels(struct sk_buff *skb, const struct nf_conn *ct) |
| 354 | { |
| 355 | struct nf_conn_labels *labels = nf_ct_labels_find(ct); |
Florian Westphal | 2301401 | 2016-07-21 12:51:16 +0200 | [diff] [blame] | 356 | unsigned int i; |
Florian Westphal | 0ceabd8 | 2013-01-11 06:30:45 +0000 | [diff] [blame] | 357 | |
| 358 | if (!labels) |
| 359 | return 0; |
| 360 | |
Florian Westphal | 0ceabd8 | 2013-01-11 06:30:45 +0000 | [diff] [blame] | 361 | i = 0; |
| 362 | do { |
| 363 | if (labels->bits[i] != 0) |
Florian Westphal | 2301401 | 2016-07-21 12:51:16 +0200 | [diff] [blame] | 364 | return nla_put(skb, CTA_LABELS, sizeof(labels->bits), |
| 365 | labels->bits); |
Florian Westphal | 0ceabd8 | 2013-01-11 06:30:45 +0000 | [diff] [blame] | 366 | i++; |
Florian Westphal | 2301401 | 2016-07-21 12:51:16 +0200 | [diff] [blame] | 367 | } while (i < ARRAY_SIZE(labels->bits)); |
Florian Westphal | 0ceabd8 | 2013-01-11 06:30:45 +0000 | [diff] [blame] | 368 | |
| 369 | return 0; |
| 370 | } |
| 371 | #else |
| 372 | #define ctnetlink_dump_labels(a, b) (0) |
| 373 | #define ctnetlink_label_size(a) (0) |
| 374 | #endif |
| 375 | |
Pablo Neira Ayuso | 0f417ce | 2007-12-17 22:28:19 -0800 | [diff] [blame] | 376 | #define master_tuple(ct) &(ct->master->tuplehash[IP_CT_DIR_ORIGINAL].tuple) |
| 377 | |
Pablo Neira Ayuso | 4054ff4 | 2016-04-12 23:32:34 +0200 | [diff] [blame] | 378 | static int ctnetlink_dump_master(struct sk_buff *skb, const struct nf_conn *ct) |
Pablo Neira Ayuso | 0f417ce | 2007-12-17 22:28:19 -0800 | [diff] [blame] | 379 | { |
| 380 | struct nlattr *nest_parms; |
| 381 | |
| 382 | if (!(ct->status & IPS_EXPECTED)) |
| 383 | return 0; |
| 384 | |
| 385 | nest_parms = nla_nest_start(skb, CTA_TUPLE_MASTER | NLA_F_NESTED); |
| 386 | if (!nest_parms) |
| 387 | goto nla_put_failure; |
| 388 | if (ctnetlink_dump_tuples(skb, master_tuple(ct)) < 0) |
| 389 | goto nla_put_failure; |
| 390 | nla_nest_end(skb, nest_parms); |
| 391 | |
| 392 | return 0; |
| 393 | |
| 394 | nla_put_failure: |
| 395 | return -1; |
| 396 | } |
| 397 | |
Ilpo Järvinen | bb5cf80 | 2008-01-05 23:11:31 -0800 | [diff] [blame] | 398 | static int |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 399 | 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] | 400 | { |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 401 | struct nlattr *nest_parms; |
| 402 | |
| 403 | nest_parms = nla_nest_start(skb, type | NLA_F_NESTED); |
| 404 | if (!nest_parms) |
| 405 | goto nla_put_failure; |
| 406 | |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 407 | if (nla_put_be32(skb, CTA_SEQADJ_CORRECTION_POS, |
| 408 | htonl(seq->correction_pos)) || |
| 409 | nla_put_be32(skb, CTA_SEQADJ_OFFSET_BEFORE, |
| 410 | htonl(seq->offset_before)) || |
| 411 | nla_put_be32(skb, CTA_SEQADJ_OFFSET_AFTER, |
| 412 | htonl(seq->offset_after))) |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 413 | goto nla_put_failure; |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 414 | |
| 415 | nla_nest_end(skb, nest_parms); |
| 416 | |
| 417 | return 0; |
| 418 | |
| 419 | nla_put_failure: |
| 420 | return -1; |
| 421 | } |
| 422 | |
Pablo Neira Ayuso | 4054ff4 | 2016-04-12 23:32:34 +0200 | [diff] [blame] | 423 | static int ctnetlink_dump_ct_seq_adj(struct sk_buff *skb, |
| 424 | const struct nf_conn *ct) |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 425 | { |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 426 | struct nf_conn_seqadj *seqadj = nfct_seqadj(ct); |
| 427 | struct nf_ct_seqadj *seq; |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 428 | |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 429 | if (!(ct->status & IPS_SEQ_ADJUST) || !seqadj) |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 430 | return 0; |
| 431 | |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 432 | seq = &seqadj->seq[IP_CT_DIR_ORIGINAL]; |
| 433 | 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] | 434 | return -1; |
| 435 | |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 436 | seq = &seqadj->seq[IP_CT_DIR_REPLY]; |
| 437 | 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] | 438 | return -1; |
| 439 | |
| 440 | return 0; |
| 441 | } |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 442 | |
Pablo Neira Ayuso | 4054ff4 | 2016-04-12 23:32:34 +0200 | [diff] [blame] | 443 | static int ctnetlink_dump_id(struct sk_buff *skb, const struct nf_conn *ct) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 444 | { |
Florian Westphal | 1922476 | 2019-08-17 00:01:34 +0100 | [diff] [blame^] | 445 | __be32 id = (__force __be32)nf_ct_get_id(ct); |
| 446 | |
| 447 | if (nla_put_be32(skb, CTA_ID, id)) |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 448 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 449 | return 0; |
| 450 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 451 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 452 | return -1; |
| 453 | } |
| 454 | |
Pablo Neira Ayuso | 4054ff4 | 2016-04-12 23:32:34 +0200 | [diff] [blame] | 455 | static int ctnetlink_dump_use(struct sk_buff *skb, const struct nf_conn *ct) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 456 | { |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 457 | if (nla_put_be32(skb, CTA_USE, htonl(atomic_read(&ct->ct_general.use)))) |
| 458 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 459 | return 0; |
| 460 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 461 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 462 | return -1; |
| 463 | } |
| 464 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 465 | static int |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 466 | 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] | 467 | struct nf_conn *ct) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 468 | { |
Daniel Borkmann | 308ac91 | 2015-08-08 21:40:01 +0200 | [diff] [blame] | 469 | const struct nf_conntrack_zone *zone; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 470 | struct nlmsghdr *nlh; |
| 471 | struct nfgenmsg *nfmsg; |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 472 | struct nlattr *nest_parms; |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 473 | unsigned int flags = portid ? NLM_F_MULTI : 0, event; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 474 | |
Pablo Neira Ayuso | 80e60e6 | 2011-12-24 14:11:39 +0100 | [diff] [blame] | 475 | event = (NFNL_SUBSYS_CTNETLINK << 8 | IPCTNL_MSG_CT_NEW); |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 476 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags); |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 477 | if (nlh == NULL) |
| 478 | goto nlmsg_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 479 | |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 480 | nfmsg = nlmsg_data(nlh); |
Patrick McHardy | 5e8fbe2 | 2008-04-14 11:15:52 +0200 | [diff] [blame] | 481 | nfmsg->nfgen_family = nf_ct_l3num(ct); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 482 | nfmsg->version = NFNETLINK_V0; |
| 483 | nfmsg->res_id = 0; |
| 484 | |
Daniel Borkmann | deedb59 | 2015-08-14 16:03:39 +0200 | [diff] [blame] | 485 | zone = nf_ct_zone(ct); |
| 486 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 487 | nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED); |
| 488 | if (!nest_parms) |
| 489 | goto nla_put_failure; |
Pablo Neira Ayuso | f2f3e38 | 2009-06-02 20:03:35 +0200 | [diff] [blame] | 490 | 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] | 491 | goto nla_put_failure; |
Daniel Borkmann | deedb59 | 2015-08-14 16:03:39 +0200 | [diff] [blame] | 492 | if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone, |
| 493 | NF_CT_ZONE_DIR_ORIG) < 0) |
| 494 | goto nla_put_failure; |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 495 | nla_nest_end(skb, nest_parms); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 496 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 497 | nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED); |
| 498 | if (!nest_parms) |
| 499 | goto nla_put_failure; |
Pablo Neira Ayuso | f2f3e38 | 2009-06-02 20:03:35 +0200 | [diff] [blame] | 500 | 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] | 501 | goto nla_put_failure; |
Daniel Borkmann | deedb59 | 2015-08-14 16:03:39 +0200 | [diff] [blame] | 502 | if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone, |
| 503 | NF_CT_ZONE_DIR_REPL) < 0) |
| 504 | goto nla_put_failure; |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 505 | nla_nest_end(skb, nest_parms); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 506 | |
Daniel Borkmann | deedb59 | 2015-08-14 16:03:39 +0200 | [diff] [blame] | 507 | if (ctnetlink_dump_zone_id(skb, CTA_ZONE, zone, |
| 508 | NF_CT_DEFAULT_ZONE_DIR) < 0) |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 509 | goto nla_put_failure; |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 510 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 511 | if (ctnetlink_dump_status(skb, ct) < 0 || |
| 512 | ctnetlink_dump_timeout(skb, ct) < 0 || |
Holger Eitzenberger | 4542fa4 | 2013-09-26 17:31:52 +0200 | [diff] [blame] | 513 | ctnetlink_dump_acct(skb, ct, type) < 0 || |
Pablo Neira Ayuso | a992ca2 | 2011-01-19 16:00:07 +0100 | [diff] [blame] | 514 | ctnetlink_dump_timestamp(skb, ct) < 0 || |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 515 | ctnetlink_dump_protoinfo(skb, ct) < 0 || |
| 516 | ctnetlink_dump_helpinfo(skb, ct) < 0 || |
| 517 | ctnetlink_dump_mark(skb, ct) < 0 || |
Eric Paris | 1cc6324 | 2010-10-13 16:24:54 -0400 | [diff] [blame] | 518 | ctnetlink_dump_secctx(skb, ct) < 0 || |
Florian Westphal | 0ceabd8 | 2013-01-11 06:30:45 +0000 | [diff] [blame] | 519 | ctnetlink_dump_labels(skb, ct) < 0 || |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 520 | ctnetlink_dump_id(skb, ct) < 0 || |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 521 | ctnetlink_dump_use(skb, ct) < 0 || |
Pablo Neira Ayuso | 0f417ce | 2007-12-17 22:28:19 -0800 | [diff] [blame] | 522 | ctnetlink_dump_master(skb, ct) < 0 || |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 523 | ctnetlink_dump_ct_seq_adj(skb, ct) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 524 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 525 | |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 526 | nlmsg_end(skb, nlh); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 527 | return skb->len; |
| 528 | |
| 529 | nlmsg_failure: |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 530 | nla_put_failure: |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 531 | nlmsg_cancel(skb, nlh); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 532 | return -1; |
| 533 | } |
| 534 | |
Pablo Neira Ayuso | 4a96300 | 2016-04-15 12:24:57 +0200 | [diff] [blame] | 535 | static inline size_t ctnetlink_proto_size(const struct nf_conn *ct) |
Holger Eitzenberger | 2732c4e | 2009-03-25 21:50:59 +0100 | [diff] [blame] | 536 | { |
| 537 | struct nf_conntrack_l3proto *l3proto; |
| 538 | struct nf_conntrack_l4proto *l4proto; |
Pablo Neira Ayuso | 03b64f5 | 2009-06-02 20:08:27 +0200 | [diff] [blame] | 539 | size_t len = 0; |
Holger Eitzenberger | 2732c4e | 2009-03-25 21:50:59 +0100 | [diff] [blame] | 540 | |
| 541 | rcu_read_lock(); |
Pablo Neira Ayuso | 03b64f5 | 2009-06-02 20:08:27 +0200 | [diff] [blame] | 542 | l3proto = __nf_ct_l3proto_find(nf_ct_l3num(ct)); |
Holger Eitzenberger | 2732c4e | 2009-03-25 21:50:59 +0100 | [diff] [blame] | 543 | len += l3proto->nla_size; |
| 544 | |
Pablo Neira Ayuso | 03b64f5 | 2009-06-02 20:08:27 +0200 | [diff] [blame] | 545 | 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] | 546 | len += l4proto->nla_size; |
| 547 | rcu_read_unlock(); |
| 548 | |
Pablo Neira Ayuso | 03b64f5 | 2009-06-02 20:08:27 +0200 | [diff] [blame] | 549 | return len; |
| 550 | } |
| 551 | |
Pablo Neira Ayuso | 4a96300 | 2016-04-15 12:24:57 +0200 | [diff] [blame] | 552 | static inline size_t ctnetlink_acct_size(const struct nf_conn *ct) |
Jiri Pirko | d26e6a0 | 2010-04-01 12:39:19 +0200 | [diff] [blame] | 553 | { |
| 554 | if (!nf_ct_ext_exist(ct, NF_CT_EXT_ACCT)) |
| 555 | return 0; |
| 556 | return 2 * nla_total_size(0) /* CTA_COUNTERS_ORIG|REPL */ |
Nicolas Dichtel | b46f6de | 2016-04-22 17:31:18 +0200 | [diff] [blame] | 557 | + 2 * nla_total_size_64bit(sizeof(uint64_t)) /* CTA_COUNTERS_PACKETS */ |
| 558 | + 2 * nla_total_size_64bit(sizeof(uint64_t)) /* CTA_COUNTERS_BYTES */ |
Jiri Pirko | d26e6a0 | 2010-04-01 12:39:19 +0200 | [diff] [blame] | 559 | ; |
| 560 | } |
| 561 | |
Pablo Neira Ayuso | 4a96300 | 2016-04-15 12:24:57 +0200 | [diff] [blame] | 562 | static inline int ctnetlink_secctx_size(const struct nf_conn *ct) |
Eric Paris | 1cc6324 | 2010-10-13 16:24:54 -0400 | [diff] [blame] | 563 | { |
Pablo Neira Ayuso | cba85b5 | 2011-01-06 11:25:00 -0800 | [diff] [blame] | 564 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
| 565 | int len, ret; |
Eric Paris | 1cc6324 | 2010-10-13 16:24:54 -0400 | [diff] [blame] | 566 | |
Pablo Neira Ayuso | cba85b5 | 2011-01-06 11:25:00 -0800 | [diff] [blame] | 567 | ret = security_secid_to_secctx(ct->secmark, NULL, &len); |
| 568 | if (ret) |
| 569 | return 0; |
Eric Paris | 1cc6324 | 2010-10-13 16:24:54 -0400 | [diff] [blame] | 570 | |
Pablo Neira Ayuso | cba85b5 | 2011-01-06 11:25:00 -0800 | [diff] [blame] | 571 | return nla_total_size(0) /* CTA_SECCTX */ |
| 572 | + nla_total_size(sizeof(char) * len); /* CTA_SECCTX_NAME */ |
| 573 | #else |
| 574 | return 0; |
Eric Paris | 1cc6324 | 2010-10-13 16:24:54 -0400 | [diff] [blame] | 575 | #endif |
Pablo Neira Ayuso | cba85b5 | 2011-01-06 11:25:00 -0800 | [diff] [blame] | 576 | } |
Eric Paris | 1cc6324 | 2010-10-13 16:24:54 -0400 | [diff] [blame] | 577 | |
Pablo Neira Ayuso | 4a96300 | 2016-04-15 12:24:57 +0200 | [diff] [blame] | 578 | static inline size_t ctnetlink_timestamp_size(const struct nf_conn *ct) |
Pablo Neira Ayuso | a992ca2 | 2011-01-19 16:00:07 +0100 | [diff] [blame] | 579 | { |
| 580 | #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP |
| 581 | if (!nf_ct_ext_exist(ct, NF_CT_EXT_TSTAMP)) |
| 582 | return 0; |
Nicolas Dichtel | b46f6de | 2016-04-22 17:31:18 +0200 | [diff] [blame] | 583 | return nla_total_size(0) + 2 * nla_total_size_64bit(sizeof(uint64_t)); |
Pablo Neira Ayuso | a992ca2 | 2011-01-19 16:00:07 +0100 | [diff] [blame] | 584 | #else |
| 585 | return 0; |
| 586 | #endif |
| 587 | } |
| 588 | |
Pablo Neira Ayuso | 4054ff4 | 2016-04-12 23:32:34 +0200 | [diff] [blame] | 589 | #ifdef CONFIG_NF_CONNTRACK_EVENTS |
| 590 | static size_t ctnetlink_nlmsg_size(const struct nf_conn *ct) |
Pablo Neira Ayuso | 03b64f5 | 2009-06-02 20:08:27 +0200 | [diff] [blame] | 591 | { |
| 592 | return NLMSG_ALIGN(sizeof(struct nfgenmsg)) |
| 593 | + 3 * nla_total_size(0) /* CTA_TUPLE_ORIG|REPL|MASTER */ |
| 594 | + 3 * nla_total_size(0) /* CTA_TUPLE_IP */ |
| 595 | + 3 * nla_total_size(0) /* CTA_TUPLE_PROTO */ |
| 596 | + 3 * nla_total_size(sizeof(u_int8_t)) /* CTA_PROTO_NUM */ |
| 597 | + nla_total_size(sizeof(u_int32_t)) /* CTA_ID */ |
| 598 | + nla_total_size(sizeof(u_int32_t)) /* CTA_STATUS */ |
Holger Eitzenberger | f7b13e4 | 2013-09-26 17:31:51 +0200 | [diff] [blame] | 599 | + ctnetlink_acct_size(ct) |
Pablo Neira Ayuso | a992ca2 | 2011-01-19 16:00:07 +0100 | [diff] [blame] | 600 | + ctnetlink_timestamp_size(ct) |
Pablo Neira Ayuso | 03b64f5 | 2009-06-02 20:08:27 +0200 | [diff] [blame] | 601 | + nla_total_size(sizeof(u_int32_t)) /* CTA_TIMEOUT */ |
| 602 | + nla_total_size(0) /* CTA_PROTOINFO */ |
| 603 | + nla_total_size(0) /* CTA_HELP */ |
| 604 | + nla_total_size(NF_CT_HELPER_NAME_LEN) /* CTA_HELP_NAME */ |
Pablo Neira Ayuso | cba85b5 | 2011-01-06 11:25:00 -0800 | [diff] [blame] | 605 | + ctnetlink_secctx_size(ct) |
Pablo Neira Ayuso | 03b64f5 | 2009-06-02 20:08:27 +0200 | [diff] [blame] | 606 | #ifdef CONFIG_NF_NAT_NEEDED |
| 607 | + 2 * nla_total_size(0) /* CTA_NAT_SEQ_ADJ_ORIG|REPL */ |
| 608 | + 6 * nla_total_size(sizeof(u_int32_t)) /* CTA_NAT_SEQ_OFFSET */ |
| 609 | #endif |
| 610 | #ifdef CONFIG_NF_CONNTRACK_MARK |
| 611 | + nla_total_size(sizeof(u_int32_t)) /* CTA_MARK */ |
| 612 | #endif |
Ken-ichirou MATSUZAWA | 4a00106 | 2014-06-16 13:52:34 +0200 | [diff] [blame] | 613 | #ifdef CONFIG_NF_CONNTRACK_ZONES |
Daniel Borkmann | deedb59 | 2015-08-14 16:03:39 +0200 | [diff] [blame] | 614 | + nla_total_size(sizeof(u_int16_t)) /* CTA_ZONE|CTA_TUPLE_ZONE */ |
Ken-ichirou MATSUZAWA | 4a00106 | 2014-06-16 13:52:34 +0200 | [diff] [blame] | 615 | #endif |
Pablo Neira Ayuso | 03b64f5 | 2009-06-02 20:08:27 +0200 | [diff] [blame] | 616 | + ctnetlink_proto_size(ct) |
Florian Westphal | 0ceabd8 | 2013-01-11 06:30:45 +0000 | [diff] [blame] | 617 | + ctnetlink_label_size(ct) |
Pablo Neira Ayuso | 03b64f5 | 2009-06-02 20:08:27 +0200 | [diff] [blame] | 618 | ; |
Holger Eitzenberger | 2732c4e | 2009-03-25 21:50:59 +0100 | [diff] [blame] | 619 | } |
| 620 | |
Pablo Neira Ayuso | e34d5c1 | 2009-06-03 10:32:06 +0200 | [diff] [blame] | 621 | static int |
| 622 | ctnetlink_conntrack_event(unsigned int events, struct nf_ct_event *item) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 623 | { |
Daniel Borkmann | 308ac91 | 2015-08-08 21:40:01 +0200 | [diff] [blame] | 624 | const struct nf_conntrack_zone *zone; |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 625 | struct net *net; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 626 | struct nlmsghdr *nlh; |
| 627 | struct nfgenmsg *nfmsg; |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 628 | struct nlattr *nest_parms; |
Pablo Neira Ayuso | 19abb7b | 2008-11-18 11:56:20 +0100 | [diff] [blame] | 629 | struct nf_conn *ct = item->ct; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 630 | struct sk_buff *skb; |
| 631 | unsigned int type; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 632 | unsigned int flags = 0, group; |
Pablo Neira Ayuso | dd7669a | 2009-06-13 12:30:52 +0200 | [diff] [blame] | 633 | int err; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 634 | |
| 635 | /* ignore our fake conntrack entry */ |
Eric Dumazet | 5bfddbd | 2010-06-08 16:09:52 +0200 | [diff] [blame] | 636 | if (nf_ct_is_untracked(ct)) |
Pablo Neira Ayuso | e34d5c1 | 2009-06-03 10:32:06 +0200 | [diff] [blame] | 637 | return 0; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 638 | |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 639 | if (events & (1 << IPCT_DESTROY)) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 640 | type = IPCTNL_MSG_CT_DELETE; |
| 641 | group = NFNLGRP_CONNTRACK_DESTROY; |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 642 | } else if (events & ((1 << IPCT_NEW) | (1 << IPCT_RELATED))) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 643 | type = IPCTNL_MSG_CT_NEW; |
| 644 | flags = NLM_F_CREATE|NLM_F_EXCL; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 645 | group = NFNLGRP_CONNTRACK_NEW; |
Pablo Neira Ayuso | 17e6e4e | 2009-06-02 20:08:46 +0200 | [diff] [blame] | 646 | } else if (events) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 647 | type = IPCTNL_MSG_CT_NEW; |
| 648 | group = NFNLGRP_CONNTRACK_UPDATE; |
| 649 | } else |
Pablo Neira Ayuso | e34d5c1 | 2009-06-03 10:32:06 +0200 | [diff] [blame] | 650 | return 0; |
Patrick McHardy | a242769 | 2006-03-20 18:03:59 -0800 | [diff] [blame] | 651 | |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 652 | net = nf_ct_net(ct); |
| 653 | if (!item->report && !nfnetlink_has_listeners(net, group)) |
Pablo Neira Ayuso | e34d5c1 | 2009-06-03 10:32:06 +0200 | [diff] [blame] | 654 | return 0; |
Patrick McHardy | a242769 | 2006-03-20 18:03:59 -0800 | [diff] [blame] | 655 | |
Pablo Neira Ayuso | 03b64f5 | 2009-06-02 20:08:27 +0200 | [diff] [blame] | 656 | skb = nlmsg_new(ctnetlink_nlmsg_size(ct), GFP_ATOMIC); |
| 657 | if (skb == NULL) |
Pablo Neira Ayuso | 150ace0 | 2009-04-17 17:47:31 +0200 | [diff] [blame] | 658 | goto errout; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 659 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 660 | type |= NFNL_SUBSYS_CTNETLINK << 8; |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 661 | nlh = nlmsg_put(skb, item->portid, 0, type, sizeof(*nfmsg), flags); |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 662 | if (nlh == NULL) |
| 663 | goto nlmsg_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 664 | |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 665 | nfmsg = nlmsg_data(nlh); |
Patrick McHardy | 5e8fbe2 | 2008-04-14 11:15:52 +0200 | [diff] [blame] | 666 | nfmsg->nfgen_family = nf_ct_l3num(ct); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 667 | nfmsg->version = NFNETLINK_V0; |
| 668 | nfmsg->res_id = 0; |
| 669 | |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 670 | rcu_read_lock(); |
Daniel Borkmann | deedb59 | 2015-08-14 16:03:39 +0200 | [diff] [blame] | 671 | zone = nf_ct_zone(ct); |
| 672 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 673 | nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED); |
| 674 | if (!nest_parms) |
| 675 | goto nla_put_failure; |
Pablo Neira Ayuso | f2f3e38 | 2009-06-02 20:03:35 +0200 | [diff] [blame] | 676 | 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] | 677 | goto nla_put_failure; |
Daniel Borkmann | deedb59 | 2015-08-14 16:03:39 +0200 | [diff] [blame] | 678 | if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone, |
| 679 | NF_CT_ZONE_DIR_ORIG) < 0) |
| 680 | goto nla_put_failure; |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 681 | nla_nest_end(skb, nest_parms); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 682 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 683 | nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED); |
| 684 | if (!nest_parms) |
| 685 | goto nla_put_failure; |
Pablo Neira Ayuso | f2f3e38 | 2009-06-02 20:03:35 +0200 | [diff] [blame] | 686 | 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] | 687 | goto nla_put_failure; |
Daniel Borkmann | deedb59 | 2015-08-14 16:03:39 +0200 | [diff] [blame] | 688 | if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone, |
| 689 | NF_CT_ZONE_DIR_REPL) < 0) |
| 690 | goto nla_put_failure; |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 691 | nla_nest_end(skb, nest_parms); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 692 | |
Daniel Borkmann | deedb59 | 2015-08-14 16:03:39 +0200 | [diff] [blame] | 693 | if (ctnetlink_dump_zone_id(skb, CTA_ZONE, zone, |
| 694 | NF_CT_DEFAULT_ZONE_DIR) < 0) |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 695 | goto nla_put_failure; |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 696 | |
Eric Leblond | 1eedf69 | 2008-05-13 23:27:11 -0700 | [diff] [blame] | 697 | if (ctnetlink_dump_id(skb, ct) < 0) |
| 698 | goto nla_put_failure; |
| 699 | |
Fabian Hugelshofer | e57dce6 | 2008-06-09 15:59:58 -0700 | [diff] [blame] | 700 | if (ctnetlink_dump_status(skb, ct) < 0) |
| 701 | goto nla_put_failure; |
| 702 | |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 703 | if (events & (1 << IPCT_DESTROY)) { |
Holger Eitzenberger | 4542fa4 | 2013-09-26 17:31:52 +0200 | [diff] [blame] | 704 | if (ctnetlink_dump_acct(skb, ct, type) < 0 || |
Pablo Neira Ayuso | a992ca2 | 2011-01-19 16:00:07 +0100 | [diff] [blame] | 705 | ctnetlink_dump_timestamp(skb, ct) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 706 | goto nla_put_failure; |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 707 | } else { |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 708 | if (ctnetlink_dump_timeout(skb, ct) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 709 | goto nla_put_failure; |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 710 | |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 711 | if (events & (1 << IPCT_PROTOINFO) |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 712 | && ctnetlink_dump_protoinfo(skb, ct) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 713 | goto nla_put_failure; |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 714 | |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 715 | if ((events & (1 << IPCT_HELPER) || nfct_help(ct)) |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 716 | && ctnetlink_dump_helpinfo(skb, ct) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 717 | goto nla_put_failure; |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 718 | |
Eric Paris | ff660c8 | 2010-10-19 18:17:32 -0400 | [diff] [blame] | 719 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 720 | if ((events & (1 << IPCT_SECMARK) || ct->secmark) |
Eric Paris | 1cc6324 | 2010-10-13 16:24:54 -0400 | [diff] [blame] | 721 | && ctnetlink_dump_secctx(skb, ct) < 0) |
Pablo Neira Ayuso | 37fccd8 | 2007-12-17 22:28:41 -0800 | [diff] [blame] | 722 | goto nla_put_failure; |
Eric Paris | ff660c8 | 2010-10-19 18:17:32 -0400 | [diff] [blame] | 723 | #endif |
Florian Westphal | 0ceabd8 | 2013-01-11 06:30:45 +0000 | [diff] [blame] | 724 | if (events & (1 << IPCT_LABEL) && |
| 725 | ctnetlink_dump_labels(skb, ct) < 0) |
| 726 | goto nla_put_failure; |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 727 | |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 728 | if (events & (1 << IPCT_RELATED) && |
Pablo Neira Ayuso | 0f417ce | 2007-12-17 22:28:19 -0800 | [diff] [blame] | 729 | ctnetlink_dump_master(skb, ct) < 0) |
| 730 | goto nla_put_failure; |
| 731 | |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 732 | if (events & (1 << IPCT_SEQADJ) && |
| 733 | ctnetlink_dump_ct_seq_adj(skb, ct) < 0) |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 734 | goto nla_put_failure; |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 735 | } |
Pablo Neira Ayuso | b9a37e0 | 2006-08-22 00:31:49 -0700 | [diff] [blame] | 736 | |
Eric Leblond | a83099a | 2008-01-31 04:44:27 -0800 | [diff] [blame] | 737 | #ifdef CONFIG_NF_CONNTRACK_MARK |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 738 | if ((events & (1 << IPCT_MARK) || ct->mark) |
Eric Leblond | a83099a | 2008-01-31 04:44:27 -0800 | [diff] [blame] | 739 | && ctnetlink_dump_mark(skb, ct) < 0) |
| 740 | goto nla_put_failure; |
| 741 | #endif |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 742 | rcu_read_unlock(); |
Eric Leblond | a83099a | 2008-01-31 04:44:27 -0800 | [diff] [blame] | 743 | |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 744 | nlmsg_end(skb, nlh); |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 745 | err = nfnetlink_send(skb, net, item->portid, group, item->report, |
Alexey Dobriyan | cd8c20b | 2010-01-13 16:02:14 +0100 | [diff] [blame] | 746 | GFP_ATOMIC); |
Pablo Neira Ayuso | dd7669a | 2009-06-13 12:30:52 +0200 | [diff] [blame] | 747 | if (err == -ENOBUFS || err == -EAGAIN) |
| 748 | return -ENOBUFS; |
| 749 | |
Pablo Neira Ayuso | e34d5c1 | 2009-06-03 10:32:06 +0200 | [diff] [blame] | 750 | return 0; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 751 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 752 | nla_put_failure: |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 753 | rcu_read_unlock(); |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 754 | nlmsg_cancel(skb, nlh); |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 755 | nlmsg_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 756 | kfree_skb(skb); |
Pablo Neira Ayuso | 150ace0 | 2009-04-17 17:47:31 +0200 | [diff] [blame] | 757 | errout: |
Pablo Neira Ayuso | 37b7ef7 | 2010-03-16 13:30:21 +0000 | [diff] [blame] | 758 | if (nfnetlink_set_err(net, 0, group, -ENOBUFS) > 0) |
| 759 | return -ENOBUFS; |
| 760 | |
Pablo Neira Ayuso | e34d5c1 | 2009-06-03 10:32:06 +0200 | [diff] [blame] | 761 | return 0; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 762 | } |
| 763 | #endif /* CONFIG_NF_CONNTRACK_EVENTS */ |
| 764 | |
| 765 | static int ctnetlink_done(struct netlink_callback *cb) |
| 766 | { |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 767 | if (cb->args[1]) |
| 768 | nf_ct_put((struct nf_conn *)cb->args[1]); |
Fabian Frederick | 397304b | 2014-06-20 22:38:58 +0200 | [diff] [blame] | 769 | kfree(cb->data); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 770 | return 0; |
| 771 | } |
| 772 | |
Kristian Evensen | 866476f | 2014-12-24 09:57:10 +0100 | [diff] [blame] | 773 | struct ctnetlink_filter { |
Pablo Neira Ayuso | 0f298a2 | 2012-02-24 14:41:50 +0000 | [diff] [blame] | 774 | struct { |
| 775 | u_int32_t val; |
| 776 | u_int32_t mask; |
| 777 | } mark; |
| 778 | }; |
| 779 | |
Kristian Evensen | 866476f | 2014-12-24 09:57:10 +0100 | [diff] [blame] | 780 | static struct ctnetlink_filter * |
| 781 | ctnetlink_alloc_filter(const struct nlattr * const cda[]) |
| 782 | { |
| 783 | #ifdef CONFIG_NF_CONNTRACK_MARK |
| 784 | struct ctnetlink_filter *filter; |
| 785 | |
| 786 | filter = kzalloc(sizeof(*filter), GFP_KERNEL); |
| 787 | if (filter == NULL) |
| 788 | return ERR_PTR(-ENOMEM); |
| 789 | |
| 790 | filter->mark.val = ntohl(nla_get_be32(cda[CTA_MARK])); |
| 791 | filter->mark.mask = ntohl(nla_get_be32(cda[CTA_MARK_MASK])); |
| 792 | |
| 793 | return filter; |
| 794 | #else |
| 795 | return ERR_PTR(-EOPNOTSUPP); |
| 796 | #endif |
| 797 | } |
| 798 | |
| 799 | static int ctnetlink_filter_match(struct nf_conn *ct, void *data) |
| 800 | { |
| 801 | struct ctnetlink_filter *filter = data; |
| 802 | |
| 803 | if (filter == NULL) |
| 804 | return 1; |
| 805 | |
| 806 | #ifdef CONFIG_NF_CONNTRACK_MARK |
| 807 | if ((ct->mark & filter->mark.mask) == filter->mark.val) |
| 808 | return 1; |
| 809 | #endif |
| 810 | |
| 811 | return 0; |
| 812 | } |
| 813 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 814 | static int |
| 815 | ctnetlink_dump_table(struct sk_buff *skb, struct netlink_callback *cb) |
| 816 | { |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 817 | struct net *net = sock_net(skb->sk); |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 818 | struct nf_conn *ct, *last; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 819 | struct nf_conntrack_tuple_hash *h; |
Eric Dumazet | ea781f1 | 2009-03-25 21:05:46 +0100 | [diff] [blame] | 820 | struct hlist_nulls_node *n; |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 821 | struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh); |
Pablo Neira Ayuso | 87711cb | 2006-01-05 12:19:23 -0800 | [diff] [blame] | 822 | u_int8_t l3proto = nfmsg->nfgen_family; |
Florian Westphal | 2344d64 | 2016-08-25 15:33:32 +0200 | [diff] [blame] | 823 | struct nf_conn *nf_ct_evict[8]; |
| 824 | int res, i; |
Jesper Dangaard Brouer | 93bb0ce | 2014-03-03 14:46:13 +0100 | [diff] [blame] | 825 | spinlock_t *lockp; |
| 826 | |
Patrick McHardy | d205dc4 | 2006-08-17 18:12:38 -0700 | [diff] [blame] | 827 | last = (struct nf_conn *)cb->args[1]; |
Florian Westphal | 2344d64 | 2016-08-25 15:33:32 +0200 | [diff] [blame] | 828 | i = 0; |
Jesper Dangaard Brouer | 93bb0ce | 2014-03-03 14:46:13 +0100 | [diff] [blame] | 829 | |
| 830 | local_bh_disable(); |
Florian Westphal | 56d52d4 | 2016-05-02 18:39:55 +0200 | [diff] [blame] | 831 | for (; cb->args[0] < nf_conntrack_htable_size; cb->args[0]++) { |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 832 | restart: |
Florian Westphal | 2344d64 | 2016-08-25 15:33:32 +0200 | [diff] [blame] | 833 | while (i) { |
| 834 | i--; |
| 835 | if (nf_ct_should_gc(nf_ct_evict[i])) |
| 836 | nf_ct_kill(nf_ct_evict[i]); |
| 837 | nf_ct_put(nf_ct_evict[i]); |
| 838 | } |
| 839 | |
Jesper Dangaard Brouer | 93bb0ce | 2014-03-03 14:46:13 +0100 | [diff] [blame] | 840 | lockp = &nf_conntrack_locks[cb->args[0] % CONNTRACK_LOCKS]; |
Sasha Levin | b16c291 | 2016-01-18 19:23:51 -0500 | [diff] [blame] | 841 | nf_conntrack_lock(lockp); |
Florian Westphal | 56d52d4 | 2016-05-02 18:39:55 +0200 | [diff] [blame] | 842 | if (cb->args[0] >= nf_conntrack_htable_size) { |
Jesper Dangaard Brouer | 93bb0ce | 2014-03-03 14:46:13 +0100 | [diff] [blame] | 843 | spin_unlock(lockp); |
| 844 | goto out; |
| 845 | } |
Florian Westphal | 56d52d4 | 2016-05-02 18:39:55 +0200 | [diff] [blame] | 846 | hlist_nulls_for_each_entry(h, n, &nf_conntrack_hash[cb->args[0]], |
| 847 | hnnode) { |
Jozsef Kadlecsik | 5b1158e | 2006-12-02 22:07:13 -0800 | [diff] [blame] | 848 | if (NF_CT_DIRECTION(h) != IP_CT_DIR_ORIGINAL) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 849 | continue; |
| 850 | ct = nf_ct_tuplehash_to_ctrack(h); |
Florian Westphal | 2344d64 | 2016-08-25 15:33:32 +0200 | [diff] [blame] | 851 | if (nf_ct_is_expired(ct)) { |
| 852 | if (i < ARRAY_SIZE(nf_ct_evict) && |
| 853 | atomic_inc_not_zero(&ct->ct_general.use)) |
| 854 | nf_ct_evict[i++] = ct; |
| 855 | continue; |
| 856 | } |
| 857 | |
Florian Westphal | e0c7d47 | 2016-04-28 19:13:45 +0200 | [diff] [blame] | 858 | if (!net_eq(net, nf_ct_net(ct))) |
| 859 | continue; |
| 860 | |
Pablo Neira Ayuso | 87711cb | 2006-01-05 12:19:23 -0800 | [diff] [blame] | 861 | /* Dump entries of a given L3 protocol number. |
| 862 | * If it is not specified, ie. l3proto == 0, |
| 863 | * then dump everything. */ |
Patrick McHardy | 5e8fbe2 | 2008-04-14 11:15:52 +0200 | [diff] [blame] | 864 | if (l3proto && nf_ct_l3num(ct) != l3proto) |
Stephen Hemminger | 13ee6ac | 2011-01-11 23:54:42 +0100 | [diff] [blame] | 865 | continue; |
Patrick McHardy | d205dc4 | 2006-08-17 18:12:38 -0700 | [diff] [blame] | 866 | if (cb->args[1]) { |
| 867 | if (ct != last) |
Stephen Hemminger | 13ee6ac | 2011-01-11 23:54:42 +0100 | [diff] [blame] | 868 | continue; |
Patrick McHardy | d205dc4 | 2006-08-17 18:12:38 -0700 | [diff] [blame] | 869 | cb->args[1] = 0; |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 870 | } |
Kristian Evensen | 866476f | 2014-12-24 09:57:10 +0100 | [diff] [blame] | 871 | if (!ctnetlink_filter_match(ct, cb->data)) |
Pablo Neira Ayuso | 0f298a2 | 2012-02-24 14:41:50 +0000 | [diff] [blame] | 872 | continue; |
Kristian Evensen | 866476f | 2014-12-24 09:57:10 +0100 | [diff] [blame] | 873 | |
Hans Schillstrom | 3b988ec | 2012-03-05 02:24:29 +0000 | [diff] [blame] | 874 | rcu_read_lock(); |
| 875 | res = |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 876 | ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).portid, |
Hans Schillstrom | 3b988ec | 2012-03-05 02:24:29 +0000 | [diff] [blame] | 877 | cb->nlh->nlmsg_seq, |
| 878 | NFNL_MSG_TYPE(cb->nlh->nlmsg_type), |
| 879 | ct); |
| 880 | rcu_read_unlock(); |
| 881 | if (res < 0) { |
Pablo Neira Ayuso | c71caf4 | 2011-01-24 19:01:07 +0100 | [diff] [blame] | 882 | nf_conntrack_get(&ct->ct_general); |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 883 | cb->args[1] = (unsigned long)ct; |
Jesper Dangaard Brouer | 93bb0ce | 2014-03-03 14:46:13 +0100 | [diff] [blame] | 884 | spin_unlock(lockp); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 885 | goto out; |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 886 | } |
| 887 | } |
Jesper Dangaard Brouer | 93bb0ce | 2014-03-03 14:46:13 +0100 | [diff] [blame] | 888 | spin_unlock(lockp); |
Patrick McHardy | d205dc4 | 2006-08-17 18:12:38 -0700 | [diff] [blame] | 889 | if (cb->args[1]) { |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 890 | cb->args[1] = 0; |
| 891 | goto restart; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 892 | } |
| 893 | } |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 894 | out: |
Jesper Dangaard Brouer | 93bb0ce | 2014-03-03 14:46:13 +0100 | [diff] [blame] | 895 | local_bh_enable(); |
Liping Zhang | 2171500 | 2017-05-21 07:22:49 +0800 | [diff] [blame] | 896 | if (last) { |
| 897 | /* nf ct hash resize happened, now clear the leftover. */ |
| 898 | if ((struct nf_conn *)cb->args[1] == last) |
| 899 | cb->args[1] = 0; |
| 900 | |
Patrick McHardy | d205dc4 | 2006-08-17 18:12:38 -0700 | [diff] [blame] | 901 | nf_ct_put(last); |
Liping Zhang | 2171500 | 2017-05-21 07:22:49 +0800 | [diff] [blame] | 902 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 903 | |
Florian Westphal | 2344d64 | 2016-08-25 15:33:32 +0200 | [diff] [blame] | 904 | while (i) { |
| 905 | i--; |
| 906 | if (nf_ct_should_gc(nf_ct_evict[i])) |
| 907 | nf_ct_kill(nf_ct_evict[i]); |
| 908 | nf_ct_put(nf_ct_evict[i]); |
| 909 | } |
| 910 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 911 | return skb->len; |
| 912 | } |
| 913 | |
Pablo Neira Ayuso | 4054ff4 | 2016-04-12 23:32:34 +0200 | [diff] [blame] | 914 | static int ctnetlink_parse_tuple_ip(struct nlattr *attr, |
| 915 | struct nf_conntrack_tuple *tuple) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 916 | { |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 917 | struct nlattr *tb[CTA_IP_MAX+1]; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 918 | struct nf_conntrack_l3proto *l3proto; |
| 919 | int ret = 0; |
| 920 | |
Daniel Borkmann | 130ffbc | 2013-06-12 17:54:51 +0200 | [diff] [blame] | 921 | ret = nla_parse_nested(tb, CTA_IP_MAX, attr, NULL); |
| 922 | if (ret < 0) |
| 923 | return ret; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 924 | |
Florian Westphal | cd91566 | 2009-03-18 17:28:37 +0100 | [diff] [blame] | 925 | rcu_read_lock(); |
| 926 | l3proto = __nf_ct_l3proto_find(tuple->src.l3num); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 927 | |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 928 | if (likely(l3proto->nlattr_to_tuple)) { |
| 929 | ret = nla_validate_nested(attr, CTA_IP_MAX, |
| 930 | l3proto->nla_policy); |
| 931 | if (ret == 0) |
| 932 | ret = l3proto->nlattr_to_tuple(tb, tuple); |
| 933 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 934 | |
Florian Westphal | cd91566 | 2009-03-18 17:28:37 +0100 | [diff] [blame] | 935 | rcu_read_unlock(); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 936 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 937 | return ret; |
| 938 | } |
| 939 | |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 940 | static const struct nla_policy proto_nla_policy[CTA_PROTO_MAX+1] = { |
| 941 | [CTA_PROTO_NUM] = { .type = NLA_U8 }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 942 | }; |
| 943 | |
Pablo Neira Ayuso | 4054ff4 | 2016-04-12 23:32:34 +0200 | [diff] [blame] | 944 | static int ctnetlink_parse_tuple_proto(struct nlattr *attr, |
| 945 | struct nf_conntrack_tuple *tuple) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 946 | { |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 947 | struct nlattr *tb[CTA_PROTO_MAX+1]; |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 948 | struct nf_conntrack_l4proto *l4proto; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 949 | int ret = 0; |
| 950 | |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 951 | ret = nla_parse_nested(tb, CTA_PROTO_MAX, attr, proto_nla_policy); |
| 952 | if (ret < 0) |
| 953 | return ret; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 954 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 955 | if (!tb[CTA_PROTO_NUM]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 956 | return -EINVAL; |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 957 | tuple->dst.protonum = nla_get_u8(tb[CTA_PROTO_NUM]); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 958 | |
Florian Westphal | cd91566 | 2009-03-18 17:28:37 +0100 | [diff] [blame] | 959 | rcu_read_lock(); |
| 960 | l4proto = __nf_ct_l4proto_find(tuple->src.l3num, tuple->dst.protonum); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 961 | |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 962 | if (likely(l4proto->nlattr_to_tuple)) { |
| 963 | ret = nla_validate_nested(attr, CTA_PROTO_MAX, |
| 964 | l4proto->nla_policy); |
| 965 | if (ret == 0) |
| 966 | ret = l4proto->nlattr_to_tuple(tb, tuple); |
| 967 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 968 | |
Florian Westphal | cd91566 | 2009-03-18 17:28:37 +0100 | [diff] [blame] | 969 | rcu_read_unlock(); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 970 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 971 | return ret; |
| 972 | } |
| 973 | |
Daniel Borkmann | deedb59 | 2015-08-14 16:03:39 +0200 | [diff] [blame] | 974 | static int |
| 975 | ctnetlink_parse_zone(const struct nlattr *attr, |
| 976 | struct nf_conntrack_zone *zone) |
| 977 | { |
Daniel Borkmann | 5e8018f | 2015-08-14 16:03:40 +0200 | [diff] [blame] | 978 | nf_ct_zone_init(zone, NF_CT_DEFAULT_ZONE_ID, |
| 979 | NF_CT_DEFAULT_ZONE_DIR, 0); |
Daniel Borkmann | deedb59 | 2015-08-14 16:03:39 +0200 | [diff] [blame] | 980 | #ifdef CONFIG_NF_CONNTRACK_ZONES |
| 981 | if (attr) |
| 982 | zone->id = ntohs(nla_get_be16(attr)); |
| 983 | #else |
| 984 | if (attr) |
| 985 | return -EOPNOTSUPP; |
| 986 | #endif |
| 987 | return 0; |
| 988 | } |
| 989 | |
| 990 | static int |
| 991 | ctnetlink_parse_tuple_zone(struct nlattr *attr, enum ctattr_type type, |
| 992 | struct nf_conntrack_zone *zone) |
| 993 | { |
| 994 | int ret; |
| 995 | |
| 996 | if (zone->id != NF_CT_DEFAULT_ZONE_ID) |
| 997 | return -EINVAL; |
| 998 | |
| 999 | ret = ctnetlink_parse_zone(attr, zone); |
| 1000 | if (ret < 0) |
| 1001 | return ret; |
| 1002 | |
| 1003 | if (type == CTA_TUPLE_REPLY) |
| 1004 | zone->dir = NF_CT_ZONE_DIR_REPL; |
| 1005 | else |
| 1006 | zone->dir = NF_CT_ZONE_DIR_ORIG; |
| 1007 | |
| 1008 | return 0; |
| 1009 | } |
| 1010 | |
Patrick McHardy | d0b0268 | 2010-02-10 15:38:33 +0100 | [diff] [blame] | 1011 | static const struct nla_policy tuple_nla_policy[CTA_TUPLE_MAX+1] = { |
| 1012 | [CTA_TUPLE_IP] = { .type = NLA_NESTED }, |
| 1013 | [CTA_TUPLE_PROTO] = { .type = NLA_NESTED }, |
Daniel Borkmann | deedb59 | 2015-08-14 16:03:39 +0200 | [diff] [blame] | 1014 | [CTA_TUPLE_ZONE] = { .type = NLA_U16 }, |
Patrick McHardy | d0b0268 | 2010-02-10 15:38:33 +0100 | [diff] [blame] | 1015 | }; |
| 1016 | |
Ilpo Järvinen | bb5cf80 | 2008-01-05 23:11:31 -0800 | [diff] [blame] | 1017 | static int |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 1018 | ctnetlink_parse_tuple(const struct nlattr * const cda[], |
Matthias Kaehlcke | 3e8f962 | 2017-04-19 11:39:20 -0700 | [diff] [blame] | 1019 | struct nf_conntrack_tuple *tuple, u32 type, |
| 1020 | u_int8_t l3num, struct nf_conntrack_zone *zone) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1021 | { |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1022 | struct nlattr *tb[CTA_TUPLE_MAX+1]; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1023 | int err; |
| 1024 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1025 | memset(tuple, 0, sizeof(*tuple)); |
| 1026 | |
Daniel Borkmann | 130ffbc | 2013-06-12 17:54:51 +0200 | [diff] [blame] | 1027 | err = nla_parse_nested(tb, CTA_TUPLE_MAX, cda[type], tuple_nla_policy); |
| 1028 | if (err < 0) |
| 1029 | return err; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1030 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1031 | if (!tb[CTA_TUPLE_IP]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1032 | return -EINVAL; |
| 1033 | |
| 1034 | tuple->src.l3num = l3num; |
| 1035 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1036 | err = ctnetlink_parse_tuple_ip(tb[CTA_TUPLE_IP], tuple); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1037 | if (err < 0) |
| 1038 | return err; |
| 1039 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1040 | if (!tb[CTA_TUPLE_PROTO]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1041 | return -EINVAL; |
| 1042 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1043 | err = ctnetlink_parse_tuple_proto(tb[CTA_TUPLE_PROTO], tuple); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1044 | if (err < 0) |
| 1045 | return err; |
| 1046 | |
Daniel Borkmann | deedb59 | 2015-08-14 16:03:39 +0200 | [diff] [blame] | 1047 | if (tb[CTA_TUPLE_ZONE]) { |
| 1048 | if (!zone) |
| 1049 | return -EINVAL; |
| 1050 | |
| 1051 | err = ctnetlink_parse_tuple_zone(tb[CTA_TUPLE_ZONE], |
| 1052 | type, zone); |
| 1053 | if (err < 0) |
| 1054 | return err; |
| 1055 | } |
| 1056 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1057 | /* orig and expect tuples get DIR_ORIGINAL */ |
| 1058 | if (type == CTA_TUPLE_REPLY) |
| 1059 | tuple->dst.dir = IP_CT_DIR_REPLY; |
| 1060 | else |
| 1061 | tuple->dst.dir = IP_CT_DIR_ORIGINAL; |
| 1062 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1063 | return 0; |
| 1064 | } |
| 1065 | |
Patrick McHardy | d0b0268 | 2010-02-10 15:38:33 +0100 | [diff] [blame] | 1066 | static const struct nla_policy help_nla_policy[CTA_HELP_MAX+1] = { |
Florian Westphal | 6d1fafc | 2012-11-22 01:32:46 +0000 | [diff] [blame] | 1067 | [CTA_HELP_NAME] = { .type = NLA_NUL_STRING, |
| 1068 | .len = NF_CT_HELPER_NAME_LEN - 1 }, |
Patrick McHardy | d0b0268 | 2010-02-10 15:38:33 +0100 | [diff] [blame] | 1069 | }; |
| 1070 | |
Pablo Neira Ayuso | 4054ff4 | 2016-04-12 23:32:34 +0200 | [diff] [blame] | 1071 | static int ctnetlink_parse_help(const struct nlattr *attr, char **helper_name, |
| 1072 | struct nlattr **helpinfo) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1073 | { |
Daniel Borkmann | 130ffbc | 2013-06-12 17:54:51 +0200 | [diff] [blame] | 1074 | int err; |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1075 | struct nlattr *tb[CTA_HELP_MAX+1]; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1076 | |
Daniel Borkmann | 130ffbc | 2013-06-12 17:54:51 +0200 | [diff] [blame] | 1077 | err = nla_parse_nested(tb, CTA_HELP_MAX, attr, help_nla_policy); |
| 1078 | if (err < 0) |
| 1079 | return err; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1080 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1081 | if (!tb[CTA_HELP_NAME]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1082 | return -EINVAL; |
| 1083 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1084 | *helper_name = nla_data(tb[CTA_HELP_NAME]); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1085 | |
Pablo Neira Ayuso | ae243be | 2012-06-07 14:19:42 +0200 | [diff] [blame] | 1086 | if (tb[CTA_HELP_INFO]) |
| 1087 | *helpinfo = tb[CTA_HELP_INFO]; |
| 1088 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1089 | return 0; |
| 1090 | } |
| 1091 | |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 1092 | static const struct nla_policy ct_nla_policy[CTA_MAX+1] = { |
Patrick McHardy | d0b0268 | 2010-02-10 15:38:33 +0100 | [diff] [blame] | 1093 | [CTA_TUPLE_ORIG] = { .type = NLA_NESTED }, |
| 1094 | [CTA_TUPLE_REPLY] = { .type = NLA_NESTED }, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 1095 | [CTA_STATUS] = { .type = NLA_U32 }, |
Patrick McHardy | d0b0268 | 2010-02-10 15:38:33 +0100 | [diff] [blame] | 1096 | [CTA_PROTOINFO] = { .type = NLA_NESTED }, |
| 1097 | [CTA_HELP] = { .type = NLA_NESTED }, |
| 1098 | [CTA_NAT_SRC] = { .type = NLA_NESTED }, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 1099 | [CTA_TIMEOUT] = { .type = NLA_U32 }, |
| 1100 | [CTA_MARK] = { .type = NLA_U32 }, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 1101 | [CTA_ID] = { .type = NLA_U32 }, |
Patrick McHardy | d0b0268 | 2010-02-10 15:38:33 +0100 | [diff] [blame] | 1102 | [CTA_NAT_DST] = { .type = NLA_NESTED }, |
| 1103 | [CTA_TUPLE_MASTER] = { .type = NLA_NESTED }, |
Florian Westphal | 6d1fafc | 2012-11-22 01:32:46 +0000 | [diff] [blame] | 1104 | [CTA_NAT_SEQ_ADJ_ORIG] = { .type = NLA_NESTED }, |
| 1105 | [CTA_NAT_SEQ_ADJ_REPLY] = { .type = NLA_NESTED }, |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 1106 | [CTA_ZONE] = { .type = NLA_U16 }, |
Pablo Neira Ayuso | 0f298a2 | 2012-02-24 14:41:50 +0000 | [diff] [blame] | 1107 | [CTA_MARK_MASK] = { .type = NLA_U32 }, |
Florian Westphal | 9b21f6a | 2013-01-11 06:30:46 +0000 | [diff] [blame] | 1108 | [CTA_LABELS] = { .type = NLA_BINARY, |
Florian Westphal | d2bf2f3 | 2014-02-18 15:25:32 +0100 | [diff] [blame] | 1109 | .len = NF_CT_LABELS_MAX_SIZE }, |
Florian Westphal | 9b21f6a | 2013-01-11 06:30:46 +0000 | [diff] [blame] | 1110 | [CTA_LABELS_MASK] = { .type = NLA_BINARY, |
Florian Westphal | d2bf2f3 | 2014-02-18 15:25:32 +0100 | [diff] [blame] | 1111 | .len = NF_CT_LABELS_MAX_SIZE }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1112 | }; |
| 1113 | |
Kristian Evensen | 866476f | 2014-12-24 09:57:10 +0100 | [diff] [blame] | 1114 | static int ctnetlink_flush_conntrack(struct net *net, |
| 1115 | const struct nlattr * const cda[], |
| 1116 | u32 portid, int report) |
| 1117 | { |
| 1118 | struct ctnetlink_filter *filter = NULL; |
| 1119 | |
| 1120 | if (cda[CTA_MARK] && cda[CTA_MARK_MASK]) { |
| 1121 | filter = ctnetlink_alloc_filter(cda); |
| 1122 | if (IS_ERR(filter)) |
| 1123 | return PTR_ERR(filter); |
| 1124 | } |
| 1125 | |
| 1126 | nf_ct_iterate_cleanup(net, ctnetlink_filter_match, filter, |
| 1127 | portid, report); |
| 1128 | kfree(filter); |
| 1129 | |
| 1130 | return 0; |
| 1131 | } |
| 1132 | |
Pablo Neira Ayuso | 7b8002a | 2015-12-15 18:41:56 +0100 | [diff] [blame] | 1133 | static int ctnetlink_del_conntrack(struct net *net, struct sock *ctnl, |
| 1134 | struct sk_buff *skb, |
| 1135 | const struct nlmsghdr *nlh, |
| 1136 | const struct nlattr * const cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1137 | { |
| 1138 | struct nf_conntrack_tuple_hash *h; |
| 1139 | struct nf_conntrack_tuple tuple; |
| 1140 | struct nf_conn *ct; |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 1141 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1142 | u_int8_t u3 = nfmsg->nfgen_family; |
Daniel Borkmann | 308ac91 | 2015-08-08 21:40:01 +0200 | [diff] [blame] | 1143 | struct nf_conntrack_zone zone; |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 1144 | int err; |
| 1145 | |
| 1146 | err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone); |
| 1147 | if (err < 0) |
| 1148 | return err; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1149 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1150 | if (cda[CTA_TUPLE_ORIG]) |
Daniel Borkmann | deedb59 | 2015-08-14 16:03:39 +0200 | [diff] [blame] | 1151 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, |
| 1152 | u3, &zone); |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1153 | else if (cda[CTA_TUPLE_REPLY]) |
Daniel Borkmann | deedb59 | 2015-08-14 16:03:39 +0200 | [diff] [blame] | 1154 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, |
| 1155 | u3, &zone); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1156 | else { |
Kristian Evensen | 866476f | 2014-12-24 09:57:10 +0100 | [diff] [blame] | 1157 | return ctnetlink_flush_conntrack(net, cda, |
| 1158 | NETLINK_CB(skb).portid, |
| 1159 | nlmsg_report(nlh)); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1160 | } |
| 1161 | |
| 1162 | if (err < 0) |
| 1163 | return err; |
| 1164 | |
Daniel Borkmann | 308ac91 | 2015-08-08 21:40:01 +0200 | [diff] [blame] | 1165 | h = nf_conntrack_find_get(net, &zone, &tuple); |
Pablo Neira Ayuso | 9ea8cfd | 2006-10-12 14:09:16 -0700 | [diff] [blame] | 1166 | if (!h) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1167 | return -ENOENT; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1168 | |
| 1169 | ct = nf_ct_tuplehash_to_ctrack(h); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1170 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1171 | if (cda[CTA_ID]) { |
Florian Westphal | 1922476 | 2019-08-17 00:01:34 +0100 | [diff] [blame^] | 1172 | __be32 id = nla_get_be32(cda[CTA_ID]); |
| 1173 | |
| 1174 | if (id != (__force __be32)nf_ct_get_id(ct)) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1175 | nf_ct_put(ct); |
| 1176 | return -ENOENT; |
| 1177 | } |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1178 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1179 | |
Florian Westphal | f330a7f | 2016-08-25 15:33:31 +0200 | [diff] [blame] | 1180 | nf_ct_delete(ct, NETLINK_CB(skb).portid, nlmsg_report(nlh)); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1181 | nf_ct_put(ct); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1182 | |
| 1183 | return 0; |
| 1184 | } |
| 1185 | |
Pablo Neira Ayuso | 7b8002a | 2015-12-15 18:41:56 +0100 | [diff] [blame] | 1186 | static int ctnetlink_get_conntrack(struct net *net, struct sock *ctnl, |
| 1187 | struct sk_buff *skb, |
| 1188 | const struct nlmsghdr *nlh, |
| 1189 | const struct nlattr * const cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1190 | { |
| 1191 | struct nf_conntrack_tuple_hash *h; |
| 1192 | struct nf_conntrack_tuple tuple; |
| 1193 | struct nf_conn *ct; |
| 1194 | struct sk_buff *skb2 = NULL; |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 1195 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1196 | u_int8_t u3 = nfmsg->nfgen_family; |
Daniel Borkmann | 308ac91 | 2015-08-08 21:40:01 +0200 | [diff] [blame] | 1197 | struct nf_conntrack_zone zone; |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 1198 | int err; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1199 | |
Pablo Neira Ayuso | 80d326f | 2012-02-24 14:30:15 +0000 | [diff] [blame] | 1200 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
| 1201 | struct netlink_dump_control c = { |
| 1202 | .dump = ctnetlink_dump_table, |
| 1203 | .done = ctnetlink_done, |
| 1204 | }; |
Kristian Evensen | 866476f | 2014-12-24 09:57:10 +0100 | [diff] [blame] | 1205 | |
Pablo Neira Ayuso | 0f298a2 | 2012-02-24 14:41:50 +0000 | [diff] [blame] | 1206 | if (cda[CTA_MARK] && cda[CTA_MARK_MASK]) { |
Kristian Evensen | 866476f | 2014-12-24 09:57:10 +0100 | [diff] [blame] | 1207 | struct ctnetlink_filter *filter; |
Pablo Neira Ayuso | 0f298a2 | 2012-02-24 14:41:50 +0000 | [diff] [blame] | 1208 | |
Kristian Evensen | 866476f | 2014-12-24 09:57:10 +0100 | [diff] [blame] | 1209 | filter = ctnetlink_alloc_filter(cda); |
| 1210 | if (IS_ERR(filter)) |
| 1211 | return PTR_ERR(filter); |
Pablo Neira Ayuso | 0f298a2 | 2012-02-24 14:41:50 +0000 | [diff] [blame] | 1212 | |
Pablo Neira Ayuso | 0f298a2 | 2012-02-24 14:41:50 +0000 | [diff] [blame] | 1213 | c.data = filter; |
| 1214 | } |
Pablo Neira Ayuso | 80d326f | 2012-02-24 14:30:15 +0000 | [diff] [blame] | 1215 | return netlink_dump_start(ctnl, skb, nlh, &c); |
| 1216 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1217 | |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 1218 | err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone); |
| 1219 | if (err < 0) |
| 1220 | return err; |
| 1221 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1222 | if (cda[CTA_TUPLE_ORIG]) |
Daniel Borkmann | deedb59 | 2015-08-14 16:03:39 +0200 | [diff] [blame] | 1223 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, |
| 1224 | u3, &zone); |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1225 | else if (cda[CTA_TUPLE_REPLY]) |
Daniel Borkmann | deedb59 | 2015-08-14 16:03:39 +0200 | [diff] [blame] | 1226 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, |
| 1227 | u3, &zone); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1228 | else |
| 1229 | return -EINVAL; |
| 1230 | |
| 1231 | if (err < 0) |
| 1232 | return err; |
| 1233 | |
Daniel Borkmann | 308ac91 | 2015-08-08 21:40:01 +0200 | [diff] [blame] | 1234 | h = nf_conntrack_find_get(net, &zone, &tuple); |
Pablo Neira Ayuso | 9ea8cfd | 2006-10-12 14:09:16 -0700 | [diff] [blame] | 1235 | if (!h) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1236 | return -ENOENT; |
Pablo Neira Ayuso | 9ea8cfd | 2006-10-12 14:09:16 -0700 | [diff] [blame] | 1237 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1238 | ct = nf_ct_tuplehash_to_ctrack(h); |
| 1239 | |
| 1240 | err = -ENOMEM; |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 1241 | skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
| 1242 | if (skb2 == NULL) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1243 | nf_ct_put(ct); |
| 1244 | return -ENOMEM; |
| 1245 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1246 | |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 1247 | rcu_read_lock(); |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1248 | 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] | 1249 | NFNL_MSG_TYPE(nlh->nlmsg_type), ct); |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 1250 | rcu_read_unlock(); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1251 | nf_ct_put(ct); |
| 1252 | if (err <= 0) |
| 1253 | goto free; |
| 1254 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1255 | err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).portid, MSG_DONTWAIT); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1256 | if (err < 0) |
| 1257 | goto out; |
| 1258 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1259 | return 0; |
| 1260 | |
| 1261 | free: |
| 1262 | kfree_skb(skb2); |
| 1263 | out: |
Pablo Neira Ayuso | f31e8d49 | 2011-01-13 14:19:55 +0100 | [diff] [blame] | 1264 | /* this avoids a loop in nfnetlink. */ |
| 1265 | return err == -EAGAIN ? -ENOBUFS : err; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1266 | } |
| 1267 | |
Pablo Neira Ayuso | d871bef | 2012-11-27 14:49:42 +0100 | [diff] [blame] | 1268 | static int ctnetlink_done_list(struct netlink_callback *cb) |
| 1269 | { |
| 1270 | if (cb->args[1]) |
| 1271 | nf_ct_put((struct nf_conn *)cb->args[1]); |
| 1272 | return 0; |
| 1273 | } |
| 1274 | |
| 1275 | static int |
Jesper Dangaard Brouer | b7779d0 | 2014-03-03 14:45:20 +0100 | [diff] [blame] | 1276 | ctnetlink_dump_list(struct sk_buff *skb, struct netlink_callback *cb, bool dying) |
Pablo Neira Ayuso | d871bef | 2012-11-27 14:49:42 +0100 | [diff] [blame] | 1277 | { |
Florian Westphal | cd5f336 | 2014-06-08 11:41:23 +0200 | [diff] [blame] | 1278 | struct nf_conn *ct, *last; |
Pablo Neira Ayuso | d871bef | 2012-11-27 14:49:42 +0100 | [diff] [blame] | 1279 | struct nf_conntrack_tuple_hash *h; |
| 1280 | struct hlist_nulls_node *n; |
| 1281 | struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh); |
| 1282 | u_int8_t l3proto = nfmsg->nfgen_family; |
| 1283 | int res; |
Jesper Dangaard Brouer | b7779d0 | 2014-03-03 14:45:20 +0100 | [diff] [blame] | 1284 | int cpu; |
| 1285 | struct hlist_nulls_head *list; |
| 1286 | struct net *net = sock_net(skb->sk); |
Pablo Neira Ayuso | d871bef | 2012-11-27 14:49:42 +0100 | [diff] [blame] | 1287 | |
| 1288 | if (cb->args[2]) |
| 1289 | return 0; |
| 1290 | |
Florian Westphal | cd5f336 | 2014-06-08 11:41:23 +0200 | [diff] [blame] | 1291 | last = (struct nf_conn *)cb->args[1]; |
| 1292 | |
Jesper Dangaard Brouer | b7779d0 | 2014-03-03 14:45:20 +0100 | [diff] [blame] | 1293 | for (cpu = cb->args[0]; cpu < nr_cpu_ids; cpu++) { |
| 1294 | struct ct_pcpu *pcpu; |
| 1295 | |
| 1296 | if (!cpu_possible(cpu)) |
Pablo Neira Ayuso | d871bef | 2012-11-27 14:49:42 +0100 | [diff] [blame] | 1297 | continue; |
Jesper Dangaard Brouer | b7779d0 | 2014-03-03 14:45:20 +0100 | [diff] [blame] | 1298 | |
| 1299 | pcpu = per_cpu_ptr(net->ct.pcpu_lists, cpu); |
| 1300 | spin_lock_bh(&pcpu->lock); |
Jesper Dangaard Brouer | b7779d0 | 2014-03-03 14:45:20 +0100 | [diff] [blame] | 1301 | list = dying ? &pcpu->dying : &pcpu->unconfirmed; |
| 1302 | restart: |
| 1303 | hlist_nulls_for_each_entry(h, n, list, hnnode) { |
| 1304 | ct = nf_ct_tuplehash_to_ctrack(h); |
| 1305 | if (l3proto && nf_ct_l3num(ct) != l3proto) |
Pablo Neira Ayuso | d871bef | 2012-11-27 14:49:42 +0100 | [diff] [blame] | 1306 | continue; |
Jesper Dangaard Brouer | b7779d0 | 2014-03-03 14:45:20 +0100 | [diff] [blame] | 1307 | if (cb->args[1]) { |
| 1308 | if (ct != last) |
| 1309 | continue; |
| 1310 | cb->args[1] = 0; |
| 1311 | } |
| 1312 | rcu_read_lock(); |
| 1313 | res = ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).portid, |
| 1314 | cb->nlh->nlmsg_seq, |
| 1315 | NFNL_MSG_TYPE(cb->nlh->nlmsg_type), |
| 1316 | ct); |
| 1317 | rcu_read_unlock(); |
| 1318 | if (res < 0) { |
Florian Westphal | cd5f336 | 2014-06-08 11:41:23 +0200 | [diff] [blame] | 1319 | if (!atomic_inc_not_zero(&ct->ct_general.use)) |
| 1320 | continue; |
Pablo Neira Ayuso | 266155b | 2014-06-05 14:28:44 +0200 | [diff] [blame] | 1321 | cb->args[0] = cpu; |
Jesper Dangaard Brouer | b7779d0 | 2014-03-03 14:45:20 +0100 | [diff] [blame] | 1322 | cb->args[1] = (unsigned long)ct; |
| 1323 | spin_unlock_bh(&pcpu->lock); |
| 1324 | goto out; |
| 1325 | } |
| 1326 | } |
| 1327 | if (cb->args[1]) { |
Pablo Neira Ayuso | d871bef | 2012-11-27 14:49:42 +0100 | [diff] [blame] | 1328 | cb->args[1] = 0; |
Jesper Dangaard Brouer | b7779d0 | 2014-03-03 14:45:20 +0100 | [diff] [blame] | 1329 | goto restart; |
Pablo Neira Ayuso | 266155b | 2014-06-05 14:28:44 +0200 | [diff] [blame] | 1330 | } |
Jesper Dangaard Brouer | b7779d0 | 2014-03-03 14:45:20 +0100 | [diff] [blame] | 1331 | spin_unlock_bh(&pcpu->lock); |
Pablo Neira Ayuso | d871bef | 2012-11-27 14:49:42 +0100 | [diff] [blame] | 1332 | } |
Pablo Neira Ayuso | 266155b | 2014-06-05 14:28:44 +0200 | [diff] [blame] | 1333 | cb->args[2] = 1; |
Pablo Neira Ayuso | d871bef | 2012-11-27 14:49:42 +0100 | [diff] [blame] | 1334 | out: |
Pablo Neira Ayuso | d871bef | 2012-11-27 14:49:42 +0100 | [diff] [blame] | 1335 | if (last) |
| 1336 | nf_ct_put(last); |
| 1337 | |
| 1338 | return skb->len; |
| 1339 | } |
| 1340 | |
| 1341 | static int |
| 1342 | ctnetlink_dump_dying(struct sk_buff *skb, struct netlink_callback *cb) |
| 1343 | { |
Jesper Dangaard Brouer | b7779d0 | 2014-03-03 14:45:20 +0100 | [diff] [blame] | 1344 | return ctnetlink_dump_list(skb, cb, true); |
Pablo Neira Ayuso | d871bef | 2012-11-27 14:49:42 +0100 | [diff] [blame] | 1345 | } |
| 1346 | |
Pablo Neira Ayuso | 7b8002a | 2015-12-15 18:41:56 +0100 | [diff] [blame] | 1347 | static int ctnetlink_get_ct_dying(struct net *net, struct sock *ctnl, |
| 1348 | struct sk_buff *skb, |
| 1349 | const struct nlmsghdr *nlh, |
| 1350 | const struct nlattr * const cda[]) |
Pablo Neira Ayuso | d871bef | 2012-11-27 14:49:42 +0100 | [diff] [blame] | 1351 | { |
| 1352 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
| 1353 | struct netlink_dump_control c = { |
| 1354 | .dump = ctnetlink_dump_dying, |
| 1355 | .done = ctnetlink_done_list, |
| 1356 | }; |
| 1357 | return netlink_dump_start(ctnl, skb, nlh, &c); |
| 1358 | } |
| 1359 | |
| 1360 | return -EOPNOTSUPP; |
| 1361 | } |
| 1362 | |
| 1363 | static int |
| 1364 | ctnetlink_dump_unconfirmed(struct sk_buff *skb, struct netlink_callback *cb) |
| 1365 | { |
Jesper Dangaard Brouer | b7779d0 | 2014-03-03 14:45:20 +0100 | [diff] [blame] | 1366 | return ctnetlink_dump_list(skb, cb, false); |
Pablo Neira Ayuso | d871bef | 2012-11-27 14:49:42 +0100 | [diff] [blame] | 1367 | } |
| 1368 | |
Pablo Neira Ayuso | 7b8002a | 2015-12-15 18:41:56 +0100 | [diff] [blame] | 1369 | static int ctnetlink_get_ct_unconfirmed(struct net *net, struct sock *ctnl, |
| 1370 | struct sk_buff *skb, |
| 1371 | const struct nlmsghdr *nlh, |
| 1372 | const struct nlattr * const cda[]) |
Pablo Neira Ayuso | d871bef | 2012-11-27 14:49:42 +0100 | [diff] [blame] | 1373 | { |
| 1374 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
| 1375 | struct netlink_dump_control c = { |
| 1376 | .dump = ctnetlink_dump_unconfirmed, |
| 1377 | .done = ctnetlink_done_list, |
| 1378 | }; |
| 1379 | return netlink_dump_start(ctnl, skb, nlh, &c); |
| 1380 | } |
| 1381 | |
| 1382 | return -EOPNOTSUPP; |
| 1383 | } |
| 1384 | |
Pablo Neira Ayuso | 6767184 | 2008-10-20 03:34:27 -0700 | [diff] [blame] | 1385 | #ifdef CONFIG_NF_NAT_NEEDED |
Ilpo Järvinen | bb5cf80 | 2008-01-05 23:11:31 -0800 | [diff] [blame] | 1386 | static int |
Pablo Neira Ayuso | e6a7d3c | 2008-10-14 11:58:31 -0700 | [diff] [blame] | 1387 | ctnetlink_parse_nat_setup(struct nf_conn *ct, |
| 1388 | enum nf_nat_manip_type manip, |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 1389 | const struct nlattr *attr) |
Pablo Neira Ayuso | e6a7d3c | 2008-10-14 11:58:31 -0700 | [diff] [blame] | 1390 | { |
| 1391 | typeof(nfnetlink_parse_nat_setup_hook) parse_nat_setup; |
Patrick McHardy | c7232c9 | 2012-08-26 19:14:06 +0200 | [diff] [blame] | 1392 | int err; |
Pablo Neira Ayuso | e6a7d3c | 2008-10-14 11:58:31 -0700 | [diff] [blame] | 1393 | |
| 1394 | parse_nat_setup = rcu_dereference(nfnetlink_parse_nat_setup_hook); |
| 1395 | if (!parse_nat_setup) { |
Johannes Berg | 95a5afc | 2008-10-16 15:24:51 -0700 | [diff] [blame] | 1396 | #ifdef CONFIG_MODULES |
Pablo Neira Ayuso | e6a7d3c | 2008-10-14 11:58:31 -0700 | [diff] [blame] | 1397 | rcu_read_unlock(); |
Pablo Neira Ayuso | c14b78e | 2013-02-05 01:50:26 +0100 | [diff] [blame] | 1398 | nfnl_unlock(NFNL_SUBSYS_CTNETLINK); |
Patrick McHardy | c7232c9 | 2012-08-26 19:14:06 +0200 | [diff] [blame] | 1399 | if (request_module("nf-nat") < 0) { |
Pablo Neira Ayuso | c14b78e | 2013-02-05 01:50:26 +0100 | [diff] [blame] | 1400 | nfnl_lock(NFNL_SUBSYS_CTNETLINK); |
Pablo Neira Ayuso | e6a7d3c | 2008-10-14 11:58:31 -0700 | [diff] [blame] | 1401 | rcu_read_lock(); |
| 1402 | return -EOPNOTSUPP; |
| 1403 | } |
Pablo Neira Ayuso | c14b78e | 2013-02-05 01:50:26 +0100 | [diff] [blame] | 1404 | nfnl_lock(NFNL_SUBSYS_CTNETLINK); |
Pablo Neira Ayuso | e6a7d3c | 2008-10-14 11:58:31 -0700 | [diff] [blame] | 1405 | rcu_read_lock(); |
| 1406 | if (nfnetlink_parse_nat_setup_hook) |
| 1407 | return -EAGAIN; |
| 1408 | #endif |
| 1409 | return -EOPNOTSUPP; |
| 1410 | } |
| 1411 | |
Patrick McHardy | c7232c9 | 2012-08-26 19:14:06 +0200 | [diff] [blame] | 1412 | err = parse_nat_setup(ct, manip, attr); |
| 1413 | if (err == -EAGAIN) { |
| 1414 | #ifdef CONFIG_MODULES |
| 1415 | rcu_read_unlock(); |
Pablo Neira Ayuso | c14b78e | 2013-02-05 01:50:26 +0100 | [diff] [blame] | 1416 | nfnl_unlock(NFNL_SUBSYS_CTNETLINK); |
Patrick McHardy | c7232c9 | 2012-08-26 19:14:06 +0200 | [diff] [blame] | 1417 | if (request_module("nf-nat-%u", nf_ct_l3num(ct)) < 0) { |
Pablo Neira Ayuso | c14b78e | 2013-02-05 01:50:26 +0100 | [diff] [blame] | 1418 | nfnl_lock(NFNL_SUBSYS_CTNETLINK); |
Patrick McHardy | c7232c9 | 2012-08-26 19:14:06 +0200 | [diff] [blame] | 1419 | rcu_read_lock(); |
| 1420 | return -EOPNOTSUPP; |
| 1421 | } |
Pablo Neira Ayuso | c14b78e | 2013-02-05 01:50:26 +0100 | [diff] [blame] | 1422 | nfnl_lock(NFNL_SUBSYS_CTNETLINK); |
Patrick McHardy | c7232c9 | 2012-08-26 19:14:06 +0200 | [diff] [blame] | 1423 | rcu_read_lock(); |
| 1424 | #else |
| 1425 | err = -EOPNOTSUPP; |
| 1426 | #endif |
| 1427 | } |
| 1428 | return err; |
Pablo Neira Ayuso | e6a7d3c | 2008-10-14 11:58:31 -0700 | [diff] [blame] | 1429 | } |
Pablo Neira Ayuso | 6767184 | 2008-10-20 03:34:27 -0700 | [diff] [blame] | 1430 | #endif |
Pablo Neira Ayuso | e6a7d3c | 2008-10-14 11:58:31 -0700 | [diff] [blame] | 1431 | |
| 1432 | static int |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 1433 | 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] | 1434 | { |
| 1435 | unsigned long d; |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 1436 | unsigned int status = ntohl(nla_get_be32(cda[CTA_STATUS])); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1437 | d = ct->status ^ status; |
| 1438 | |
| 1439 | if (d & (IPS_EXPECTED|IPS_CONFIRMED|IPS_DYING)) |
| 1440 | /* unchangeable */ |
Pablo Neira Ayuso | 0adf9d6 | 2008-06-09 15:56:20 -0700 | [diff] [blame] | 1441 | return -EBUSY; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1442 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1443 | if (d & IPS_SEEN_REPLY && !(status & IPS_SEEN_REPLY)) |
| 1444 | /* SEEN_REPLY bit can only be set */ |
Pablo Neira Ayuso | 0adf9d6 | 2008-06-09 15:56:20 -0700 | [diff] [blame] | 1445 | return -EBUSY; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1446 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1447 | if (d & IPS_ASSURED && !(status & IPS_ASSURED)) |
| 1448 | /* ASSURED bit can only be set */ |
Pablo Neira Ayuso | 0adf9d6 | 2008-06-09 15:56:20 -0700 | [diff] [blame] | 1449 | return -EBUSY; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1450 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1451 | /* Be careful here, modifying NAT bits can screw up things, |
| 1452 | * 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] | 1453 | * nf_nat_range. */ |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1454 | ct->status |= status & ~(IPS_NAT_DONE_MASK | IPS_NAT_MASK); |
| 1455 | return 0; |
| 1456 | } |
| 1457 | |
Pablo Neira Ayuso | e6a7d3c | 2008-10-14 11:58:31 -0700 | [diff] [blame] | 1458 | static int |
Pablo Neira Ayuso | 0eba801 | 2014-02-16 12:15:43 +0100 | [diff] [blame] | 1459 | ctnetlink_setup_nat(struct nf_conn *ct, const struct nlattr * const cda[]) |
Pablo Neira Ayuso | e6a7d3c | 2008-10-14 11:58:31 -0700 | [diff] [blame] | 1460 | { |
| 1461 | #ifdef CONFIG_NF_NAT_NEEDED |
| 1462 | int ret; |
| 1463 | |
Florian Westphal | fe337ac | 2014-04-28 21:07:31 +0200 | [diff] [blame] | 1464 | if (!cda[CTA_NAT_DST] && !cda[CTA_NAT_SRC]) |
| 1465 | return 0; |
| 1466 | |
Pablo Neira Ayuso | 0eba801 | 2014-02-16 12:15:43 +0100 | [diff] [blame] | 1467 | ret = ctnetlink_parse_nat_setup(ct, NF_NAT_MANIP_DST, |
| 1468 | cda[CTA_NAT_DST]); |
| 1469 | if (ret < 0) |
| 1470 | return ret; |
| 1471 | |
| 1472 | ret = ctnetlink_parse_nat_setup(ct, NF_NAT_MANIP_SRC, |
| 1473 | cda[CTA_NAT_SRC]); |
| 1474 | return ret; |
Pablo Neira Ayuso | e6a7d3c | 2008-10-14 11:58:31 -0700 | [diff] [blame] | 1475 | #else |
Pablo Neira Ayuso | 0eba801 | 2014-02-16 12:15:43 +0100 | [diff] [blame] | 1476 | if (!cda[CTA_NAT_DST] && !cda[CTA_NAT_SRC]) |
| 1477 | return 0; |
Pablo Neira Ayuso | e6a7d3c | 2008-10-14 11:58:31 -0700 | [diff] [blame] | 1478 | return -EOPNOTSUPP; |
| 1479 | #endif |
| 1480 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1481 | |
Pablo Neira Ayuso | 4054ff4 | 2016-04-12 23:32:34 +0200 | [diff] [blame] | 1482 | static int ctnetlink_change_helper(struct nf_conn *ct, |
| 1483 | const struct nlattr * const cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1484 | { |
| 1485 | struct nf_conntrack_helper *helper; |
Harald Welte | dc808fe | 2006-03-20 17:56:32 -0800 | [diff] [blame] | 1486 | struct nf_conn_help *help = nfct_help(ct); |
Pablo Neira Ayuso | 29fe1b4 | 2009-04-22 02:26:37 -0700 | [diff] [blame] | 1487 | char *helpname = NULL; |
Pablo Neira Ayuso | ae243be | 2012-06-07 14:19:42 +0200 | [diff] [blame] | 1488 | struct nlattr *helpinfo = NULL; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1489 | int err; |
| 1490 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1491 | /* don't change helper of sibling connections */ |
| 1492 | if (ct->master) |
Pablo Neira Ayuso | 0adf9d6 | 2008-06-09 15:56:20 -0700 | [diff] [blame] | 1493 | return -EBUSY; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1494 | |
Pablo Neira Ayuso | ae243be | 2012-06-07 14:19:42 +0200 | [diff] [blame] | 1495 | err = ctnetlink_parse_help(cda[CTA_HELP], &helpname, &helpinfo); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1496 | if (err < 0) |
| 1497 | return err; |
| 1498 | |
Yasuyuki Kozakai | df293bb | 2007-05-10 14:15:58 -0700 | [diff] [blame] | 1499 | if (!strcmp(helpname, "")) { |
| 1500 | if (help && help->helper) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1501 | /* we had a helper before ... */ |
| 1502 | nf_ct_remove_expectations(ct); |
Stephen Hemminger | a9b3cd7 | 2011-08-01 16:19:00 +0000 | [diff] [blame] | 1503 | RCU_INIT_POINTER(help->helper, NULL); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1504 | } |
Yasuyuki Kozakai | df293bb | 2007-05-10 14:15:58 -0700 | [diff] [blame] | 1505 | |
| 1506 | return 0; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1507 | } |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1508 | |
Patrick McHardy | 794e687 | 2010-02-03 13:41:29 +0100 | [diff] [blame] | 1509 | helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct), |
| 1510 | nf_ct_protonum(ct)); |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1511 | if (helper == NULL) { |
| 1512 | #ifdef CONFIG_MODULES |
Jesper Dangaard Brouer | ca7433d | 2014-03-03 14:46:01 +0100 | [diff] [blame] | 1513 | spin_unlock_bh(&nf_conntrack_expect_lock); |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1514 | |
| 1515 | if (request_module("nfct-helper-%s", helpname) < 0) { |
Jesper Dangaard Brouer | ca7433d | 2014-03-03 14:46:01 +0100 | [diff] [blame] | 1516 | spin_lock_bh(&nf_conntrack_expect_lock); |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1517 | return -EOPNOTSUPP; |
| 1518 | } |
| 1519 | |
Jesper Dangaard Brouer | ca7433d | 2014-03-03 14:46:01 +0100 | [diff] [blame] | 1520 | spin_lock_bh(&nf_conntrack_expect_lock); |
Patrick McHardy | 794e687 | 2010-02-03 13:41:29 +0100 | [diff] [blame] | 1521 | helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct), |
| 1522 | nf_ct_protonum(ct)); |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1523 | if (helper) |
| 1524 | return -EAGAIN; |
| 1525 | #endif |
Pablo Neira Ayuso | 0adf9d6 | 2008-06-09 15:56:20 -0700 | [diff] [blame] | 1526 | return -EOPNOTSUPP; |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1527 | } |
Yasuyuki Kozakai | df293bb | 2007-05-10 14:15:58 -0700 | [diff] [blame] | 1528 | |
Yasuyuki Kozakai | ceceae1 | 2007-07-07 22:23:42 -0700 | [diff] [blame] | 1529 | if (help) { |
Pablo Neira Ayuso | ae243be | 2012-06-07 14:19:42 +0200 | [diff] [blame] | 1530 | if (help->helper == helper) { |
| 1531 | /* update private helper data if allowed. */ |
Pablo Neira Ayuso | 7be54ca | 2012-09-21 16:52:08 +0200 | [diff] [blame] | 1532 | if (helper->from_nlattr) |
Pablo Neira Ayuso | ae243be | 2012-06-07 14:19:42 +0200 | [diff] [blame] | 1533 | helper->from_nlattr(helpinfo, ct); |
Yasuyuki Kozakai | ceceae1 | 2007-07-07 22:23:42 -0700 | [diff] [blame] | 1534 | return 0; |
Pablo Neira Ayuso | fd7462d | 2012-06-18 17:29:53 +0200 | [diff] [blame] | 1535 | } else |
Yasuyuki Kozakai | ceceae1 | 2007-07-07 22:23:42 -0700 | [diff] [blame] | 1536 | return -EBUSY; |
Yasuyuki Kozakai | ceceae1 | 2007-07-07 22:23:42 -0700 | [diff] [blame] | 1537 | } |
Yasuyuki Kozakai | df293bb | 2007-05-10 14:15:58 -0700 | [diff] [blame] | 1538 | |
Pablo Neira Ayuso | fd7462d | 2012-06-18 17:29:53 +0200 | [diff] [blame] | 1539 | /* we cannot set a helper for an existing conntrack */ |
| 1540 | return -EOPNOTSUPP; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1541 | } |
| 1542 | |
Pablo Neira Ayuso | 4054ff4 | 2016-04-12 23:32:34 +0200 | [diff] [blame] | 1543 | static int ctnetlink_change_timeout(struct nf_conn *ct, |
| 1544 | const struct nlattr * const cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1545 | { |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 1546 | u_int32_t timeout = ntohl(nla_get_be32(cda[CTA_TIMEOUT])); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1547 | |
Florian Westphal | f330a7f | 2016-08-25 15:33:31 +0200 | [diff] [blame] | 1548 | ct->timeout = nfct_time_stamp + timeout * HZ; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1549 | |
Florian Westphal | f330a7f | 2016-08-25 15:33:31 +0200 | [diff] [blame] | 1550 | if (test_bit(IPS_DYING_BIT, &ct->status)) |
| 1551 | return -ETIME; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1552 | |
| 1553 | return 0; |
| 1554 | } |
| 1555 | |
Patrick McHardy | d0b0268 | 2010-02-10 15:38:33 +0100 | [diff] [blame] | 1556 | static const struct nla_policy protoinfo_policy[CTA_PROTOINFO_MAX+1] = { |
| 1557 | [CTA_PROTOINFO_TCP] = { .type = NLA_NESTED }, |
| 1558 | [CTA_PROTOINFO_DCCP] = { .type = NLA_NESTED }, |
| 1559 | [CTA_PROTOINFO_SCTP] = { .type = NLA_NESTED }, |
| 1560 | }; |
| 1561 | |
Pablo Neira Ayuso | 4054ff4 | 2016-04-12 23:32:34 +0200 | [diff] [blame] | 1562 | static int ctnetlink_change_protoinfo(struct nf_conn *ct, |
| 1563 | const struct nlattr * const cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1564 | { |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 1565 | const struct nlattr *attr = cda[CTA_PROTOINFO]; |
| 1566 | struct nlattr *tb[CTA_PROTOINFO_MAX+1]; |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 1567 | struct nf_conntrack_l4proto *l4proto; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1568 | int err = 0; |
| 1569 | |
Daniel Borkmann | 130ffbc | 2013-06-12 17:54:51 +0200 | [diff] [blame] | 1570 | err = nla_parse_nested(tb, CTA_PROTOINFO_MAX, attr, protoinfo_policy); |
| 1571 | if (err < 0) |
| 1572 | return err; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1573 | |
Florian Westphal | cd91566 | 2009-03-18 17:28:37 +0100 | [diff] [blame] | 1574 | rcu_read_lock(); |
| 1575 | 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] | 1576 | if (l4proto->from_nlattr) |
| 1577 | err = l4proto->from_nlattr(tb, ct); |
Florian Westphal | cd91566 | 2009-03-18 17:28:37 +0100 | [diff] [blame] | 1578 | rcu_read_unlock(); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1579 | |
| 1580 | return err; |
| 1581 | } |
| 1582 | |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 1583 | static const struct nla_policy seqadj_policy[CTA_SEQADJ_MAX+1] = { |
| 1584 | [CTA_SEQADJ_CORRECTION_POS] = { .type = NLA_U32 }, |
| 1585 | [CTA_SEQADJ_OFFSET_BEFORE] = { .type = NLA_U32 }, |
| 1586 | [CTA_SEQADJ_OFFSET_AFTER] = { .type = NLA_U32 }, |
Patrick McHardy | d0b0268 | 2010-02-10 15:38:33 +0100 | [diff] [blame] | 1587 | }; |
| 1588 | |
Pablo Neira Ayuso | 4054ff4 | 2016-04-12 23:32:34 +0200 | [diff] [blame] | 1589 | static int change_seq_adj(struct nf_ct_seqadj *seq, |
| 1590 | const struct nlattr * const attr) |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1591 | { |
Daniel Borkmann | 130ffbc | 2013-06-12 17:54:51 +0200 | [diff] [blame] | 1592 | int err; |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 1593 | struct nlattr *cda[CTA_SEQADJ_MAX+1]; |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1594 | |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 1595 | err = nla_parse_nested(cda, CTA_SEQADJ_MAX, attr, seqadj_policy); |
Daniel Borkmann | 130ffbc | 2013-06-12 17:54:51 +0200 | [diff] [blame] | 1596 | if (err < 0) |
| 1597 | return err; |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1598 | |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 1599 | if (!cda[CTA_SEQADJ_CORRECTION_POS]) |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1600 | return -EINVAL; |
| 1601 | |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 1602 | seq->correction_pos = |
| 1603 | ntohl(nla_get_be32(cda[CTA_SEQADJ_CORRECTION_POS])); |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1604 | |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 1605 | if (!cda[CTA_SEQADJ_OFFSET_BEFORE]) |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1606 | return -EINVAL; |
| 1607 | |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 1608 | seq->offset_before = |
| 1609 | ntohl(nla_get_be32(cda[CTA_SEQADJ_OFFSET_BEFORE])); |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1610 | |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 1611 | if (!cda[CTA_SEQADJ_OFFSET_AFTER]) |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1612 | return -EINVAL; |
| 1613 | |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 1614 | seq->offset_after = |
| 1615 | ntohl(nla_get_be32(cda[CTA_SEQADJ_OFFSET_AFTER])); |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1616 | |
| 1617 | return 0; |
| 1618 | } |
| 1619 | |
| 1620 | static int |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 1621 | ctnetlink_change_seq_adj(struct nf_conn *ct, |
| 1622 | const struct nlattr * const cda[]) |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1623 | { |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 1624 | struct nf_conn_seqadj *seqadj = nfct_seqadj(ct); |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1625 | int ret = 0; |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1626 | |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 1627 | if (!seqadj) |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1628 | return 0; |
| 1629 | |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 1630 | if (cda[CTA_SEQ_ADJ_ORIG]) { |
| 1631 | ret = change_seq_adj(&seqadj->seq[IP_CT_DIR_ORIGINAL], |
| 1632 | cda[CTA_SEQ_ADJ_ORIG]); |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1633 | if (ret < 0) |
| 1634 | return ret; |
| 1635 | |
| 1636 | ct->status |= IPS_SEQ_ADJUST; |
| 1637 | } |
| 1638 | |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 1639 | if (cda[CTA_SEQ_ADJ_REPLY]) { |
| 1640 | ret = change_seq_adj(&seqadj->seq[IP_CT_DIR_REPLY], |
| 1641 | cda[CTA_SEQ_ADJ_REPLY]); |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1642 | if (ret < 0) |
| 1643 | return ret; |
| 1644 | |
| 1645 | ct->status |= IPS_SEQ_ADJUST; |
| 1646 | } |
| 1647 | |
| 1648 | return 0; |
| 1649 | } |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1650 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1651 | static int |
Florian Westphal | 9b21f6a | 2013-01-11 06:30:46 +0000 | [diff] [blame] | 1652 | ctnetlink_attach_labels(struct nf_conn *ct, const struct nlattr * const cda[]) |
| 1653 | { |
| 1654 | #ifdef CONFIG_NF_CONNTRACK_LABELS |
| 1655 | size_t len = nla_len(cda[CTA_LABELS]); |
| 1656 | const void *mask = cda[CTA_LABELS_MASK]; |
| 1657 | |
| 1658 | if (len & (sizeof(u32)-1)) /* must be multiple of u32 */ |
| 1659 | return -EINVAL; |
| 1660 | |
| 1661 | if (mask) { |
| 1662 | if (nla_len(cda[CTA_LABELS_MASK]) == 0 || |
| 1663 | nla_len(cda[CTA_LABELS_MASK]) != len) |
| 1664 | return -EINVAL; |
| 1665 | mask = nla_data(cda[CTA_LABELS_MASK]); |
| 1666 | } |
| 1667 | |
| 1668 | len /= sizeof(u32); |
| 1669 | |
| 1670 | return nf_connlabels_replace(ct, nla_data(cda[CTA_LABELS]), mask, len); |
| 1671 | #else |
| 1672 | return -EOPNOTSUPP; |
| 1673 | #endif |
| 1674 | } |
| 1675 | |
| 1676 | static int |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 1677 | ctnetlink_change_conntrack(struct nf_conn *ct, |
| 1678 | const struct nlattr * const cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1679 | { |
| 1680 | int err; |
| 1681 | |
Pablo Neira Ayuso | e098360 | 2009-03-16 15:27:22 +0100 | [diff] [blame] | 1682 | /* only allow NAT changes and master assignation for new conntracks */ |
| 1683 | if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST] || cda[CTA_TUPLE_MASTER]) |
| 1684 | return -EOPNOTSUPP; |
| 1685 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1686 | if (cda[CTA_HELP]) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1687 | err = ctnetlink_change_helper(ct, cda); |
| 1688 | if (err < 0) |
| 1689 | return err; |
| 1690 | } |
| 1691 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1692 | if (cda[CTA_TIMEOUT]) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1693 | err = ctnetlink_change_timeout(ct, cda); |
| 1694 | if (err < 0) |
| 1695 | return err; |
| 1696 | } |
| 1697 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1698 | if (cda[CTA_STATUS]) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1699 | err = ctnetlink_change_status(ct, cda); |
| 1700 | if (err < 0) |
| 1701 | return err; |
| 1702 | } |
| 1703 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1704 | if (cda[CTA_PROTOINFO]) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1705 | err = ctnetlink_change_protoinfo(ct, cda); |
| 1706 | if (err < 0) |
| 1707 | return err; |
| 1708 | } |
| 1709 | |
Martin Josefsson | bcd1e83 | 2006-04-01 02:23:21 -0800 | [diff] [blame] | 1710 | #if defined(CONFIG_NF_CONNTRACK_MARK) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1711 | if (cda[CTA_MARK]) |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 1712 | ct->mark = ntohl(nla_get_be32(cda[CTA_MARK])); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1713 | #endif |
| 1714 | |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 1715 | if (cda[CTA_SEQ_ADJ_ORIG] || cda[CTA_SEQ_ADJ_REPLY]) { |
| 1716 | err = ctnetlink_change_seq_adj(ct, cda); |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1717 | if (err < 0) |
| 1718 | return err; |
| 1719 | } |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 1720 | |
Florian Westphal | 9b21f6a | 2013-01-11 06:30:46 +0000 | [diff] [blame] | 1721 | if (cda[CTA_LABELS]) { |
| 1722 | err = ctnetlink_attach_labels(ct, cda); |
| 1723 | if (err < 0) |
| 1724 | return err; |
| 1725 | } |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1726 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1727 | return 0; |
| 1728 | } |
| 1729 | |
Pablo Neira Ayuso | f0a3c08 | 2009-03-16 15:28:09 +0100 | [diff] [blame] | 1730 | static struct nf_conn * |
Daniel Borkmann | 308ac91 | 2015-08-08 21:40:01 +0200 | [diff] [blame] | 1731 | ctnetlink_create_conntrack(struct net *net, |
| 1732 | const struct nf_conntrack_zone *zone, |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 1733 | const struct nlattr * const cda[], |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1734 | struct nf_conntrack_tuple *otuple, |
Pablo Neira Ayuso | 5faa1f4 | 2007-09-28 14:43:53 -0700 | [diff] [blame] | 1735 | struct nf_conntrack_tuple *rtuple, |
Pablo Neira Ayuso | 7ec4749 | 2009-03-16 15:25:46 +0100 | [diff] [blame] | 1736 | u8 u3) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1737 | { |
| 1738 | struct nf_conn *ct; |
| 1739 | int err = -EINVAL; |
Yasuyuki Kozakai | ceceae1 | 2007-07-07 22:23:42 -0700 | [diff] [blame] | 1740 | struct nf_conntrack_helper *helper; |
Pablo Neira Ayuso | 315c34d | 2011-04-21 10:55:07 +0200 | [diff] [blame] | 1741 | struct nf_conn_tstamp *tstamp; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1742 | |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 1743 | ct = nf_conntrack_alloc(net, zone, otuple, rtuple, GFP_ATOMIC); |
Julia Lawall | cd7fcbf | 2009-01-12 00:06:08 +0000 | [diff] [blame] | 1744 | if (IS_ERR(ct)) |
Pablo Neira Ayuso | f0a3c08 | 2009-03-16 15:28:09 +0100 | [diff] [blame] | 1745 | return ERR_PTR(-ENOMEM); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1746 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1747 | if (!cda[CTA_TIMEOUT]) |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1748 | goto err1; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1749 | |
Florian Westphal | f330a7f | 2016-08-25 15:33:31 +0200 | [diff] [blame] | 1750 | ct->timeout = nfct_time_stamp + ntohl(nla_get_be32(cda[CTA_TIMEOUT])) * HZ; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1751 | |
Patrick McHardy | 58a3c9b | 2008-01-31 04:36:54 -0800 | [diff] [blame] | 1752 | rcu_read_lock(); |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1753 | if (cda[CTA_HELP]) { |
Pablo Neira Ayuso | 29fe1b4 | 2009-04-22 02:26:37 -0700 | [diff] [blame] | 1754 | char *helpname = NULL; |
Pablo Neira Ayuso | ae243be | 2012-06-07 14:19:42 +0200 | [diff] [blame] | 1755 | struct nlattr *helpinfo = NULL; |
| 1756 | |
| 1757 | err = ctnetlink_parse_help(cda[CTA_HELP], &helpname, &helpinfo); |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1758 | if (err < 0) |
| 1759 | goto err2; |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1760 | |
Patrick McHardy | 794e687 | 2010-02-03 13:41:29 +0100 | [diff] [blame] | 1761 | helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct), |
| 1762 | nf_ct_protonum(ct)); |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1763 | if (helper == NULL) { |
| 1764 | rcu_read_unlock(); |
| 1765 | #ifdef CONFIG_MODULES |
| 1766 | if (request_module("nfct-helper-%s", helpname) < 0) { |
| 1767 | err = -EOPNOTSUPP; |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1768 | goto err1; |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1769 | } |
| 1770 | |
| 1771 | rcu_read_lock(); |
Patrick McHardy | 794e687 | 2010-02-03 13:41:29 +0100 | [diff] [blame] | 1772 | helper = __nf_conntrack_helper_find(helpname, |
| 1773 | nf_ct_l3num(ct), |
| 1774 | nf_ct_protonum(ct)); |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1775 | if (helper) { |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1776 | err = -EAGAIN; |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1777 | goto err2; |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1778 | } |
| 1779 | rcu_read_unlock(); |
| 1780 | #endif |
| 1781 | err = -EOPNOTSUPP; |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1782 | goto err1; |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1783 | } else { |
| 1784 | struct nf_conn_help *help; |
| 1785 | |
Pablo Neira Ayuso | 1afc567 | 2012-06-07 12:11:50 +0200 | [diff] [blame] | 1786 | help = nf_ct_helper_ext_add(ct, helper, GFP_ATOMIC); |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1787 | if (help == NULL) { |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1788 | err = -ENOMEM; |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1789 | goto err2; |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1790 | } |
Pablo Neira Ayuso | ae243be | 2012-06-07 14:19:42 +0200 | [diff] [blame] | 1791 | /* set private helper data if allowed. */ |
Pablo Neira Ayuso | 7be54ca | 2012-09-21 16:52:08 +0200 | [diff] [blame] | 1792 | if (helper->from_nlattr) |
Pablo Neira Ayuso | ae243be | 2012-06-07 14:19:42 +0200 | [diff] [blame] | 1793 | helper->from_nlattr(helpinfo, ct); |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1794 | |
| 1795 | /* not in hash table yet so not strictly necessary */ |
Stephen Hemminger | a9b3cd7 | 2011-08-01 16:19:00 +0000 | [diff] [blame] | 1796 | RCU_INIT_POINTER(help->helper, helper); |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1797 | } |
| 1798 | } else { |
| 1799 | /* try an implicit helper assignation */ |
Patrick McHardy | b2a15a6 | 2010-02-03 14:13:03 +0100 | [diff] [blame] | 1800 | err = __nf_ct_try_assign_helper(ct, NULL, GFP_ATOMIC); |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1801 | if (err < 0) |
| 1802 | goto err2; |
Patrick McHarrdy | 3c158f7 | 2007-06-05 12:55:27 -0700 | [diff] [blame] | 1803 | } |
Yasuyuki Kozakai | dafc741 | 2006-11-27 10:25:32 -0800 | [diff] [blame] | 1804 | |
Pablo Neira Ayuso | 0eba801 | 2014-02-16 12:15:43 +0100 | [diff] [blame] | 1805 | err = ctnetlink_setup_nat(ct, cda); |
| 1806 | if (err < 0) |
| 1807 | goto err2; |
Pablo Neira Ayuso | 1575e7e | 2008-08-18 21:30:55 -0700 | [diff] [blame] | 1808 | |
Pablo Neira Ayuso | a88e22a | 2010-02-19 14:24:39 +0100 | [diff] [blame] | 1809 | nf_ct_acct_ext_add(ct, GFP_ATOMIC); |
Pablo Neira Ayuso | a992ca2 | 2011-01-19 16:00:07 +0100 | [diff] [blame] | 1810 | nf_ct_tstamp_ext_add(ct, GFP_ATOMIC); |
Pablo Neira Ayuso | a88e22a | 2010-02-19 14:24:39 +0100 | [diff] [blame] | 1811 | nf_ct_ecache_ext_add(ct, 0, 0, GFP_ATOMIC); |
Florian Westphal | c539f01 | 2013-01-11 06:30:44 +0000 | [diff] [blame] | 1812 | nf_ct_labels_ext_add(ct); |
Eric Leblond | b89bd0c | 2017-05-11 18:56:38 +0200 | [diff] [blame] | 1813 | nfct_seqadj_ext_add(ct); |
| 1814 | nfct_synproxy_ext_add(ct); |
Florian Westphal | c539f01 | 2013-01-11 06:30:44 +0000 | [diff] [blame] | 1815 | |
Pablo Neira Ayuso | a88e22a | 2010-02-19 14:24:39 +0100 | [diff] [blame] | 1816 | /* we must add conntrack extensions before confirmation. */ |
| 1817 | ct->status |= IPS_CONFIRMED; |
| 1818 | |
| 1819 | if (cda[CTA_STATUS]) { |
| 1820 | err = ctnetlink_change_status(ct, cda); |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1821 | if (err < 0) |
| 1822 | goto err2; |
Pablo Neira Ayuso | e6a7d3c | 2008-10-14 11:58:31 -0700 | [diff] [blame] | 1823 | } |
| 1824 | |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 1825 | if (cda[CTA_SEQ_ADJ_ORIG] || cda[CTA_SEQ_ADJ_REPLY]) { |
| 1826 | err = ctnetlink_change_seq_adj(ct, cda); |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1827 | if (err < 0) |
| 1828 | goto err2; |
Pablo Neira Ayuso | c969aa7 | 2009-02-09 14:33:57 -0800 | [diff] [blame] | 1829 | } |
Pablo Neira Ayuso | c969aa7 | 2009-02-09 14:33:57 -0800 | [diff] [blame] | 1830 | |
Changli Gao | e5fc9e7 | 2010-11-12 17:33:17 +0100 | [diff] [blame] | 1831 | memset(&ct->proto, 0, sizeof(ct->proto)); |
Pablo Neira Ayuso | 1575e7e | 2008-08-18 21:30:55 -0700 | [diff] [blame] | 1832 | if (cda[CTA_PROTOINFO]) { |
| 1833 | err = ctnetlink_change_protoinfo(ct, cda); |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1834 | if (err < 0) |
| 1835 | goto err2; |
Pablo Neira Ayuso | 1575e7e | 2008-08-18 21:30:55 -0700 | [diff] [blame] | 1836 | } |
| 1837 | |
Pablo Neira Ayuso | 1575e7e | 2008-08-18 21:30:55 -0700 | [diff] [blame] | 1838 | #if defined(CONFIG_NF_CONNTRACK_MARK) |
| 1839 | if (cda[CTA_MARK]) |
| 1840 | ct->mark = ntohl(nla_get_be32(cda[CTA_MARK])); |
| 1841 | #endif |
| 1842 | |
Pablo Neira Ayuso | 5faa1f4 | 2007-09-28 14:43:53 -0700 | [diff] [blame] | 1843 | /* setup master conntrack: this is a confirmed expectation */ |
Pablo Neira Ayuso | 7ec4749 | 2009-03-16 15:25:46 +0100 | [diff] [blame] | 1844 | if (cda[CTA_TUPLE_MASTER]) { |
| 1845 | struct nf_conntrack_tuple master; |
| 1846 | struct nf_conntrack_tuple_hash *master_h; |
| 1847 | struct nf_conn *master_ct; |
| 1848 | |
Daniel Borkmann | deedb59 | 2015-08-14 16:03:39 +0200 | [diff] [blame] | 1849 | err = ctnetlink_parse_tuple(cda, &master, CTA_TUPLE_MASTER, |
| 1850 | u3, NULL); |
Pablo Neira Ayuso | 7ec4749 | 2009-03-16 15:25:46 +0100 | [diff] [blame] | 1851 | if (err < 0) |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1852 | goto err2; |
Pablo Neira Ayuso | 7ec4749 | 2009-03-16 15:25:46 +0100 | [diff] [blame] | 1853 | |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 1854 | master_h = nf_conntrack_find_get(net, zone, &master); |
Pablo Neira Ayuso | 7ec4749 | 2009-03-16 15:25:46 +0100 | [diff] [blame] | 1855 | if (master_h == NULL) { |
| 1856 | err = -ENOENT; |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1857 | goto err2; |
Pablo Neira Ayuso | 7ec4749 | 2009-03-16 15:25:46 +0100 | [diff] [blame] | 1858 | } |
| 1859 | master_ct = nf_ct_tuplehash_to_ctrack(master_h); |
Pablo Neira Ayuso | f2a8900 | 2007-12-12 10:34:29 -0800 | [diff] [blame] | 1860 | __set_bit(IPS_EXPECTED_BIT, &ct->status); |
Pablo Neira Ayuso | 5faa1f4 | 2007-09-28 14:43:53 -0700 | [diff] [blame] | 1861 | ct->master = master_ct; |
Pablo Neira Ayuso | f2a8900 | 2007-12-12 10:34:29 -0800 | [diff] [blame] | 1862 | } |
Pablo Neira Ayuso | 315c34d | 2011-04-21 10:55:07 +0200 | [diff] [blame] | 1863 | tstamp = nf_conn_tstamp_find(ct); |
| 1864 | if (tstamp) |
Eric Dumazet | d2de875 | 2014-08-22 18:32:09 -0700 | [diff] [blame] | 1865 | tstamp->start = ktime_get_real_ns(); |
Pablo Neira Ayuso | 5faa1f4 | 2007-09-28 14:43:53 -0700 | [diff] [blame] | 1866 | |
Jozsef Kadlecsik | 7d367e0 | 2012-02-24 11:45:49 +0100 | [diff] [blame] | 1867 | err = nf_conntrack_hash_check_insert(ct); |
| 1868 | if (err < 0) |
| 1869 | goto err2; |
| 1870 | |
Patrick McHardy | 58a3c9b | 2008-01-31 04:36:54 -0800 | [diff] [blame] | 1871 | rcu_read_unlock(); |
Yasuyuki Kozakai | dafc741 | 2006-11-27 10:25:32 -0800 | [diff] [blame] | 1872 | |
Pablo Neira Ayuso | f0a3c08 | 2009-03-16 15:28:09 +0100 | [diff] [blame] | 1873 | return ct; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1874 | |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1875 | err2: |
| 1876 | rcu_read_unlock(); |
| 1877 | err1: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1878 | nf_conntrack_free(ct); |
Pablo Neira Ayuso | f0a3c08 | 2009-03-16 15:28:09 +0100 | [diff] [blame] | 1879 | return ERR_PTR(err); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1880 | } |
| 1881 | |
Pablo Neira Ayuso | 7b8002a | 2015-12-15 18:41:56 +0100 | [diff] [blame] | 1882 | static int ctnetlink_new_conntrack(struct net *net, struct sock *ctnl, |
| 1883 | struct sk_buff *skb, |
| 1884 | const struct nlmsghdr *nlh, |
| 1885 | const struct nlattr * const cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1886 | { |
| 1887 | struct nf_conntrack_tuple otuple, rtuple; |
| 1888 | struct nf_conntrack_tuple_hash *h = NULL; |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 1889 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
Jozsef Kadlecsik | 7d367e0 | 2012-02-24 11:45:49 +0100 | [diff] [blame] | 1890 | struct nf_conn *ct; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1891 | u_int8_t u3 = nfmsg->nfgen_family; |
Daniel Borkmann | 308ac91 | 2015-08-08 21:40:01 +0200 | [diff] [blame] | 1892 | struct nf_conntrack_zone zone; |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 1893 | int err; |
| 1894 | |
| 1895 | err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone); |
| 1896 | if (err < 0) |
| 1897 | return err; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1898 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1899 | if (cda[CTA_TUPLE_ORIG]) { |
Daniel Borkmann | deedb59 | 2015-08-14 16:03:39 +0200 | [diff] [blame] | 1900 | err = ctnetlink_parse_tuple(cda, &otuple, CTA_TUPLE_ORIG, |
| 1901 | u3, &zone); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1902 | if (err < 0) |
| 1903 | return err; |
| 1904 | } |
| 1905 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1906 | if (cda[CTA_TUPLE_REPLY]) { |
Daniel Borkmann | deedb59 | 2015-08-14 16:03:39 +0200 | [diff] [blame] | 1907 | err = ctnetlink_parse_tuple(cda, &rtuple, CTA_TUPLE_REPLY, |
| 1908 | u3, &zone); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1909 | if (err < 0) |
| 1910 | return err; |
| 1911 | } |
| 1912 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1913 | if (cda[CTA_TUPLE_ORIG]) |
Daniel Borkmann | 308ac91 | 2015-08-08 21:40:01 +0200 | [diff] [blame] | 1914 | h = nf_conntrack_find_get(net, &zone, &otuple); |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1915 | else if (cda[CTA_TUPLE_REPLY]) |
Daniel Borkmann | 308ac91 | 2015-08-08 21:40:01 +0200 | [diff] [blame] | 1916 | h = nf_conntrack_find_get(net, &zone, &rtuple); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1917 | |
| 1918 | if (h == NULL) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1919 | err = -ENOENT; |
Pablo Neira Ayuso | f0a3c08 | 2009-03-16 15:28:09 +0100 | [diff] [blame] | 1920 | if (nlh->nlmsg_flags & NLM_F_CREATE) { |
Pablo Neira Ayuso | fecc113 | 2009-05-05 17:48:26 +0200 | [diff] [blame] | 1921 | enum ip_conntrack_events events; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1922 | |
Florian Westphal | 442fad9 | 2013-02-11 23:22:38 +0000 | [diff] [blame] | 1923 | if (!cda[CTA_TUPLE_ORIG] || !cda[CTA_TUPLE_REPLY]) |
| 1924 | return -EINVAL; |
Liping Zhang | aa0c2c6 | 2016-08-08 22:10:26 +0800 | [diff] [blame] | 1925 | if (otuple.dst.protonum != rtuple.dst.protonum) |
| 1926 | return -EINVAL; |
Florian Westphal | 442fad9 | 2013-02-11 23:22:38 +0000 | [diff] [blame] | 1927 | |
Daniel Borkmann | 308ac91 | 2015-08-08 21:40:01 +0200 | [diff] [blame] | 1928 | ct = ctnetlink_create_conntrack(net, &zone, cda, &otuple, |
Pablo Neira Ayuso | f0a3c08 | 2009-03-16 15:28:09 +0100 | [diff] [blame] | 1929 | &rtuple, u3); |
Jozsef Kadlecsik | 7d367e0 | 2012-02-24 11:45:49 +0100 | [diff] [blame] | 1930 | if (IS_ERR(ct)) |
| 1931 | return PTR_ERR(ct); |
| 1932 | |
Pablo Neira Ayuso | f0a3c08 | 2009-03-16 15:28:09 +0100 | [diff] [blame] | 1933 | err = 0; |
Pablo Neira Ayuso | fecc113 | 2009-05-05 17:48:26 +0200 | [diff] [blame] | 1934 | if (test_bit(IPS_EXPECTED_BIT, &ct->status)) |
| 1935 | events = IPCT_RELATED; |
| 1936 | else |
| 1937 | events = IPCT_NEW; |
| 1938 | |
Florian Westphal | 9b21f6a | 2013-01-11 06:30:46 +0000 | [diff] [blame] | 1939 | if (cda[CTA_LABELS] && |
| 1940 | ctnetlink_attach_labels(ct, cda) == 0) |
| 1941 | events |= (1 << IPCT_LABEL); |
| 1942 | |
Patrick McHardy | 858b3133 | 2010-02-03 13:48:53 +0100 | [diff] [blame] | 1943 | nf_conntrack_eventmask_report((1 << IPCT_REPLY) | |
| 1944 | (1 << IPCT_ASSURED) | |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 1945 | (1 << IPCT_HELPER) | |
| 1946 | (1 << IPCT_PROTOINFO) | |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 1947 | (1 << IPCT_SEQADJ) | |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 1948 | (1 << IPCT_MARK) | events, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1949 | ct, NETLINK_CB(skb).portid, |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 1950 | nlmsg_report(nlh)); |
Pablo Neira Ayuso | f0a3c08 | 2009-03-16 15:28:09 +0100 | [diff] [blame] | 1951 | nf_ct_put(ct); |
Jozsef Kadlecsik | 7d367e0 | 2012-02-24 11:45:49 +0100 | [diff] [blame] | 1952 | } |
Pablo Neira Ayuso | 5faa1f4 | 2007-09-28 14:43:53 -0700 | [diff] [blame] | 1953 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1954 | return err; |
| 1955 | } |
| 1956 | /* implicit 'else' */ |
| 1957 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1958 | err = -EEXIST; |
Jozsef Kadlecsik | 7d367e0 | 2012-02-24 11:45:49 +0100 | [diff] [blame] | 1959 | ct = nf_ct_tuplehash_to_ctrack(h); |
Pablo Neira Ayuso | ff4ca82 | 2007-08-07 18:11:26 -0700 | [diff] [blame] | 1960 | if (!(nlh->nlmsg_flags & NLM_F_EXCL)) { |
Jesper Dangaard Brouer | ca7433d | 2014-03-03 14:46:01 +0100 | [diff] [blame] | 1961 | spin_lock_bh(&nf_conntrack_expect_lock); |
Pablo Neira Ayuso | 19abb7b | 2008-11-18 11:56:20 +0100 | [diff] [blame] | 1962 | err = ctnetlink_change_conntrack(ct, cda); |
Jesper Dangaard Brouer | ca7433d | 2014-03-03 14:46:01 +0100 | [diff] [blame] | 1963 | spin_unlock_bh(&nf_conntrack_expect_lock); |
Pablo Neira Ayuso | 19abb7b | 2008-11-18 11:56:20 +0100 | [diff] [blame] | 1964 | if (err == 0) { |
Patrick McHardy | 858b3133 | 2010-02-03 13:48:53 +0100 | [diff] [blame] | 1965 | nf_conntrack_eventmask_report((1 << IPCT_REPLY) | |
| 1966 | (1 << IPCT_ASSURED) | |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 1967 | (1 << IPCT_HELPER) | |
Florian Westphal | 797a7d6 | 2013-06-21 16:51:30 +0200 | [diff] [blame] | 1968 | (1 << IPCT_LABEL) | |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 1969 | (1 << IPCT_PROTOINFO) | |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 1970 | (1 << IPCT_SEQADJ) | |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 1971 | (1 << IPCT_MARK), |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1972 | ct, NETLINK_CB(skb).portid, |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 1973 | nlmsg_report(nlh)); |
Jozsef Kadlecsik | 7d367e0 | 2012-02-24 11:45:49 +0100 | [diff] [blame] | 1974 | } |
Pablo Neira Ayuso | ff4ca82 | 2007-08-07 18:11:26 -0700 | [diff] [blame] | 1975 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1976 | |
Jozsef Kadlecsik | 7d367e0 | 2012-02-24 11:45:49 +0100 | [diff] [blame] | 1977 | nf_ct_put(ct); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1978 | return err; |
| 1979 | } |
| 1980 | |
Pablo Neira Ayuso | 392025f | 2012-06-26 20:27:09 +0200 | [diff] [blame] | 1981 | static int |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1982 | 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] | 1983 | __u16 cpu, const struct ip_conntrack_stat *st) |
| 1984 | { |
| 1985 | struct nlmsghdr *nlh; |
| 1986 | struct nfgenmsg *nfmsg; |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1987 | unsigned int flags = portid ? NLM_F_MULTI : 0, event; |
Pablo Neira Ayuso | 392025f | 2012-06-26 20:27:09 +0200 | [diff] [blame] | 1988 | |
| 1989 | event = (NFNL_SUBSYS_CTNETLINK << 8 | IPCTNL_MSG_CT_GET_STATS_CPU); |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1990 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags); |
Pablo Neira Ayuso | 392025f | 2012-06-26 20:27:09 +0200 | [diff] [blame] | 1991 | if (nlh == NULL) |
| 1992 | goto nlmsg_failure; |
| 1993 | |
| 1994 | nfmsg = nlmsg_data(nlh); |
| 1995 | nfmsg->nfgen_family = AF_UNSPEC; |
| 1996 | nfmsg->version = NFNETLINK_V0; |
| 1997 | nfmsg->res_id = htons(cpu); |
| 1998 | |
Florian Westphal | 8e8118f | 2016-09-11 22:55:53 +0200 | [diff] [blame] | 1999 | if (nla_put_be32(skb, CTA_STATS_FOUND, htonl(st->found)) || |
Pablo Neira Ayuso | 392025f | 2012-06-26 20:27:09 +0200 | [diff] [blame] | 2000 | nla_put_be32(skb, CTA_STATS_INVALID, htonl(st->invalid)) || |
| 2001 | nla_put_be32(skb, CTA_STATS_IGNORE, htonl(st->ignore)) || |
Pablo Neira Ayuso | 392025f | 2012-06-26 20:27:09 +0200 | [diff] [blame] | 2002 | nla_put_be32(skb, CTA_STATS_INSERT, htonl(st->insert)) || |
| 2003 | nla_put_be32(skb, CTA_STATS_INSERT_FAILED, |
| 2004 | htonl(st->insert_failed)) || |
| 2005 | nla_put_be32(skb, CTA_STATS_DROP, htonl(st->drop)) || |
| 2006 | nla_put_be32(skb, CTA_STATS_EARLY_DROP, htonl(st->early_drop)) || |
| 2007 | nla_put_be32(skb, CTA_STATS_ERROR, htonl(st->error)) || |
| 2008 | nla_put_be32(skb, CTA_STATS_SEARCH_RESTART, |
| 2009 | htonl(st->search_restart))) |
| 2010 | goto nla_put_failure; |
| 2011 | |
| 2012 | nlmsg_end(skb, nlh); |
| 2013 | return skb->len; |
| 2014 | |
| 2015 | nla_put_failure: |
| 2016 | nlmsg_failure: |
| 2017 | nlmsg_cancel(skb, nlh); |
| 2018 | return -1; |
| 2019 | } |
| 2020 | |
| 2021 | static int |
| 2022 | ctnetlink_ct_stat_cpu_dump(struct sk_buff *skb, struct netlink_callback *cb) |
| 2023 | { |
| 2024 | int cpu; |
| 2025 | struct net *net = sock_net(skb->sk); |
| 2026 | |
| 2027 | if (cb->args[0] == nr_cpu_ids) |
| 2028 | return 0; |
| 2029 | |
| 2030 | for (cpu = cb->args[0]; cpu < nr_cpu_ids; cpu++) { |
| 2031 | const struct ip_conntrack_stat *st; |
| 2032 | |
| 2033 | if (!cpu_possible(cpu)) |
| 2034 | continue; |
| 2035 | |
| 2036 | st = per_cpu_ptr(net->ct.stat, cpu); |
| 2037 | if (ctnetlink_ct_stat_cpu_fill_info(skb, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2038 | NETLINK_CB(cb->skb).portid, |
Pablo Neira Ayuso | 392025f | 2012-06-26 20:27:09 +0200 | [diff] [blame] | 2039 | cb->nlh->nlmsg_seq, |
| 2040 | cpu, st) < 0) |
| 2041 | break; |
| 2042 | } |
| 2043 | cb->args[0] = cpu; |
| 2044 | |
| 2045 | return skb->len; |
| 2046 | } |
| 2047 | |
Pablo Neira Ayuso | 7b8002a | 2015-12-15 18:41:56 +0100 | [diff] [blame] | 2048 | static int ctnetlink_stat_ct_cpu(struct net *net, struct sock *ctnl, |
| 2049 | struct sk_buff *skb, |
| 2050 | const struct nlmsghdr *nlh, |
| 2051 | const struct nlattr * const cda[]) |
Pablo Neira Ayuso | 392025f | 2012-06-26 20:27:09 +0200 | [diff] [blame] | 2052 | { |
| 2053 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
| 2054 | struct netlink_dump_control c = { |
| 2055 | .dump = ctnetlink_ct_stat_cpu_dump, |
| 2056 | }; |
| 2057 | return netlink_dump_start(ctnl, skb, nlh, &c); |
| 2058 | } |
| 2059 | |
| 2060 | return 0; |
| 2061 | } |
| 2062 | |
| 2063 | static int |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2064 | 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] | 2065 | struct net *net) |
| 2066 | { |
| 2067 | struct nlmsghdr *nlh; |
| 2068 | struct nfgenmsg *nfmsg; |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2069 | unsigned int flags = portid ? NLM_F_MULTI : 0, event; |
Pablo Neira Ayuso | 392025f | 2012-06-26 20:27:09 +0200 | [diff] [blame] | 2070 | unsigned int nr_conntracks = atomic_read(&net->ct.count); |
| 2071 | |
| 2072 | event = (NFNL_SUBSYS_CTNETLINK << 8 | IPCTNL_MSG_CT_GET_STATS); |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2073 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags); |
Pablo Neira Ayuso | 392025f | 2012-06-26 20:27:09 +0200 | [diff] [blame] | 2074 | if (nlh == NULL) |
| 2075 | goto nlmsg_failure; |
| 2076 | |
| 2077 | nfmsg = nlmsg_data(nlh); |
| 2078 | nfmsg->nfgen_family = AF_UNSPEC; |
| 2079 | nfmsg->version = NFNETLINK_V0; |
| 2080 | nfmsg->res_id = 0; |
| 2081 | |
| 2082 | if (nla_put_be32(skb, CTA_STATS_GLOBAL_ENTRIES, htonl(nr_conntracks))) |
| 2083 | goto nla_put_failure; |
| 2084 | |
| 2085 | nlmsg_end(skb, nlh); |
| 2086 | return skb->len; |
| 2087 | |
| 2088 | nla_put_failure: |
| 2089 | nlmsg_failure: |
| 2090 | nlmsg_cancel(skb, nlh); |
| 2091 | return -1; |
| 2092 | } |
| 2093 | |
Pablo Neira Ayuso | 7b8002a | 2015-12-15 18:41:56 +0100 | [diff] [blame] | 2094 | static int ctnetlink_stat_ct(struct net *net, struct sock *ctnl, |
| 2095 | struct sk_buff *skb, const struct nlmsghdr *nlh, |
| 2096 | const struct nlattr * const cda[]) |
Pablo Neira Ayuso | 392025f | 2012-06-26 20:27:09 +0200 | [diff] [blame] | 2097 | { |
| 2098 | struct sk_buff *skb2; |
| 2099 | int err; |
| 2100 | |
| 2101 | skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
| 2102 | if (skb2 == NULL) |
| 2103 | return -ENOMEM; |
| 2104 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2105 | err = ctnetlink_stat_ct_fill_info(skb2, NETLINK_CB(skb).portid, |
Pablo Neira Ayuso | 392025f | 2012-06-26 20:27:09 +0200 | [diff] [blame] | 2106 | nlh->nlmsg_seq, |
| 2107 | NFNL_MSG_TYPE(nlh->nlmsg_type), |
| 2108 | sock_net(skb->sk)); |
| 2109 | if (err <= 0) |
| 2110 | goto free; |
| 2111 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2112 | err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).portid, MSG_DONTWAIT); |
Pablo Neira Ayuso | 392025f | 2012-06-26 20:27:09 +0200 | [diff] [blame] | 2113 | if (err < 0) |
| 2114 | goto out; |
| 2115 | |
| 2116 | return 0; |
| 2117 | |
| 2118 | free: |
| 2119 | kfree_skb(skb2); |
| 2120 | out: |
| 2121 | /* this avoids a loop in nfnetlink. */ |
| 2122 | return err == -EAGAIN ? -ENOBUFS : err; |
| 2123 | } |
| 2124 | |
Pablo Neira Ayuso | bd07793 | 2013-08-07 18:13:20 +0200 | [diff] [blame] | 2125 | static const struct nla_policy exp_nla_policy[CTA_EXPECT_MAX+1] = { |
| 2126 | [CTA_EXPECT_MASTER] = { .type = NLA_NESTED }, |
| 2127 | [CTA_EXPECT_TUPLE] = { .type = NLA_NESTED }, |
| 2128 | [CTA_EXPECT_MASK] = { .type = NLA_NESTED }, |
| 2129 | [CTA_EXPECT_TIMEOUT] = { .type = NLA_U32 }, |
| 2130 | [CTA_EXPECT_ID] = { .type = NLA_U32 }, |
| 2131 | [CTA_EXPECT_HELP_NAME] = { .type = NLA_NUL_STRING, |
| 2132 | .len = NF_CT_HELPER_NAME_LEN - 1 }, |
| 2133 | [CTA_EXPECT_ZONE] = { .type = NLA_U16 }, |
| 2134 | [CTA_EXPECT_FLAGS] = { .type = NLA_U32 }, |
| 2135 | [CTA_EXPECT_CLASS] = { .type = NLA_U32 }, |
| 2136 | [CTA_EXPECT_NAT] = { .type = NLA_NESTED }, |
| 2137 | [CTA_EXPECT_FN] = { .type = NLA_NUL_STRING }, |
| 2138 | }; |
| 2139 | |
| 2140 | static struct nf_conntrack_expect * |
| 2141 | ctnetlink_alloc_expect(const struct nlattr *const cda[], struct nf_conn *ct, |
| 2142 | struct nf_conntrack_helper *helper, |
| 2143 | struct nf_conntrack_tuple *tuple, |
| 2144 | struct nf_conntrack_tuple *mask); |
| 2145 | |
Ken-ichirou MATSUZAWA | 83f3e94 | 2015-10-05 11:48:47 +0900 | [diff] [blame] | 2146 | #ifdef CONFIG_NETFILTER_NETLINK_GLUE_CT |
Pablo Neira Ayuso | 9cb0176 | 2012-06-07 12:13:39 +0200 | [diff] [blame] | 2147 | static size_t |
Ken-ichirou MATSUZAWA | a4b4766 | 2015-10-05 11:47:13 +0900 | [diff] [blame] | 2148 | ctnetlink_glue_build_size(const struct nf_conn *ct) |
Pablo Neira Ayuso | 9cb0176 | 2012-06-07 12:13:39 +0200 | [diff] [blame] | 2149 | { |
| 2150 | return 3 * nla_total_size(0) /* CTA_TUPLE_ORIG|REPL|MASTER */ |
| 2151 | + 3 * nla_total_size(0) /* CTA_TUPLE_IP */ |
| 2152 | + 3 * nla_total_size(0) /* CTA_TUPLE_PROTO */ |
| 2153 | + 3 * nla_total_size(sizeof(u_int8_t)) /* CTA_PROTO_NUM */ |
| 2154 | + nla_total_size(sizeof(u_int32_t)) /* CTA_ID */ |
| 2155 | + nla_total_size(sizeof(u_int32_t)) /* CTA_STATUS */ |
| 2156 | + nla_total_size(sizeof(u_int32_t)) /* CTA_TIMEOUT */ |
| 2157 | + nla_total_size(0) /* CTA_PROTOINFO */ |
| 2158 | + nla_total_size(0) /* CTA_HELP */ |
| 2159 | + nla_total_size(NF_CT_HELPER_NAME_LEN) /* CTA_HELP_NAME */ |
| 2160 | + ctnetlink_secctx_size(ct) |
| 2161 | #ifdef CONFIG_NF_NAT_NEEDED |
| 2162 | + 2 * nla_total_size(0) /* CTA_NAT_SEQ_ADJ_ORIG|REPL */ |
| 2163 | + 6 * nla_total_size(sizeof(u_int32_t)) /* CTA_NAT_SEQ_OFFSET */ |
| 2164 | #endif |
| 2165 | #ifdef CONFIG_NF_CONNTRACK_MARK |
| 2166 | + nla_total_size(sizeof(u_int32_t)) /* CTA_MARK */ |
| 2167 | #endif |
Ken-ichirou MATSUZAWA | 4a00106 | 2014-06-16 13:52:34 +0200 | [diff] [blame] | 2168 | #ifdef CONFIG_NF_CONNTRACK_ZONES |
Daniel Borkmann | deedb59 | 2015-08-14 16:03:39 +0200 | [diff] [blame] | 2169 | + nla_total_size(sizeof(u_int16_t)) /* CTA_ZONE|CTA_TUPLE_ZONE */ |
Ken-ichirou MATSUZAWA | 4a00106 | 2014-06-16 13:52:34 +0200 | [diff] [blame] | 2170 | #endif |
Pablo Neira Ayuso | 9cb0176 | 2012-06-07 12:13:39 +0200 | [diff] [blame] | 2171 | + ctnetlink_proto_size(ct) |
| 2172 | ; |
| 2173 | } |
| 2174 | |
Ken-ichirou MATSUZAWA | 224a059 | 2015-10-05 11:49:56 +0900 | [diff] [blame] | 2175 | static struct nf_conn *ctnetlink_glue_get_ct(const struct sk_buff *skb, |
Ken-ichirou MATSUZAWA | a4b4766 | 2015-10-05 11:47:13 +0900 | [diff] [blame] | 2176 | enum ip_conntrack_info *ctinfo) |
Pablo Neira Ayuso | b7bd180 | 2015-09-30 22:53:44 +0100 | [diff] [blame] | 2177 | { |
| 2178 | struct nf_conn *ct; |
| 2179 | |
| 2180 | ct = nf_ct_get(skb, ctinfo); |
| 2181 | if (ct && nf_ct_is_untracked(ct)) |
| 2182 | ct = NULL; |
| 2183 | |
| 2184 | return ct; |
| 2185 | } |
| 2186 | |
Ken-ichirou MATSUZAWA | a4b4766 | 2015-10-05 11:47:13 +0900 | [diff] [blame] | 2187 | static int __ctnetlink_glue_build(struct sk_buff *skb, struct nf_conn *ct) |
Pablo Neira Ayuso | 9cb0176 | 2012-06-07 12:13:39 +0200 | [diff] [blame] | 2188 | { |
Daniel Borkmann | 308ac91 | 2015-08-08 21:40:01 +0200 | [diff] [blame] | 2189 | const struct nf_conntrack_zone *zone; |
Pablo Neira Ayuso | 9cb0176 | 2012-06-07 12:13:39 +0200 | [diff] [blame] | 2190 | struct nlattr *nest_parms; |
| 2191 | |
| 2192 | rcu_read_lock(); |
Daniel Borkmann | deedb59 | 2015-08-14 16:03:39 +0200 | [diff] [blame] | 2193 | zone = nf_ct_zone(ct); |
| 2194 | |
Pablo Neira Ayuso | 9cb0176 | 2012-06-07 12:13:39 +0200 | [diff] [blame] | 2195 | nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED); |
| 2196 | if (!nest_parms) |
| 2197 | goto nla_put_failure; |
| 2198 | if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_ORIGINAL)) < 0) |
| 2199 | goto nla_put_failure; |
Daniel Borkmann | deedb59 | 2015-08-14 16:03:39 +0200 | [diff] [blame] | 2200 | if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone, |
| 2201 | NF_CT_ZONE_DIR_ORIG) < 0) |
| 2202 | goto nla_put_failure; |
Pablo Neira Ayuso | 9cb0176 | 2012-06-07 12:13:39 +0200 | [diff] [blame] | 2203 | nla_nest_end(skb, nest_parms); |
| 2204 | |
| 2205 | nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED); |
| 2206 | if (!nest_parms) |
| 2207 | goto nla_put_failure; |
| 2208 | if (ctnetlink_dump_tuples(skb, nf_ct_tuple(ct, IP_CT_DIR_REPLY)) < 0) |
| 2209 | goto nla_put_failure; |
Daniel Borkmann | deedb59 | 2015-08-14 16:03:39 +0200 | [diff] [blame] | 2210 | if (ctnetlink_dump_zone_id(skb, CTA_TUPLE_ZONE, zone, |
| 2211 | NF_CT_ZONE_DIR_REPL) < 0) |
| 2212 | goto nla_put_failure; |
Pablo Neira Ayuso | 9cb0176 | 2012-06-07 12:13:39 +0200 | [diff] [blame] | 2213 | nla_nest_end(skb, nest_parms); |
| 2214 | |
Daniel Borkmann | deedb59 | 2015-08-14 16:03:39 +0200 | [diff] [blame] | 2215 | if (ctnetlink_dump_zone_id(skb, CTA_ZONE, zone, |
| 2216 | NF_CT_DEFAULT_ZONE_DIR) < 0) |
Daniel Borkmann | 308ac91 | 2015-08-08 21:40:01 +0200 | [diff] [blame] | 2217 | goto nla_put_failure; |
Pablo Neira Ayuso | 9cb0176 | 2012-06-07 12:13:39 +0200 | [diff] [blame] | 2218 | |
| 2219 | if (ctnetlink_dump_id(skb, ct) < 0) |
| 2220 | goto nla_put_failure; |
| 2221 | |
| 2222 | if (ctnetlink_dump_status(skb, ct) < 0) |
| 2223 | goto nla_put_failure; |
| 2224 | |
| 2225 | if (ctnetlink_dump_timeout(skb, ct) < 0) |
| 2226 | goto nla_put_failure; |
| 2227 | |
| 2228 | if (ctnetlink_dump_protoinfo(skb, ct) < 0) |
| 2229 | goto nla_put_failure; |
| 2230 | |
| 2231 | if (ctnetlink_dump_helpinfo(skb, ct) < 0) |
| 2232 | goto nla_put_failure; |
| 2233 | |
| 2234 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
| 2235 | if (ct->secmark && ctnetlink_dump_secctx(skb, ct) < 0) |
| 2236 | goto nla_put_failure; |
| 2237 | #endif |
| 2238 | if (ct->master && ctnetlink_dump_master(skb, ct) < 0) |
| 2239 | goto nla_put_failure; |
| 2240 | |
| 2241 | if ((ct->status & IPS_SEQ_ADJUST) && |
Patrick McHardy | 41d73ec | 2013-08-27 08:50:12 +0200 | [diff] [blame] | 2242 | ctnetlink_dump_ct_seq_adj(skb, ct) < 0) |
Pablo Neira Ayuso | 9cb0176 | 2012-06-07 12:13:39 +0200 | [diff] [blame] | 2243 | goto nla_put_failure; |
| 2244 | |
| 2245 | #ifdef CONFIG_NF_CONNTRACK_MARK |
| 2246 | if (ct->mark && ctnetlink_dump_mark(skb, ct) < 0) |
| 2247 | goto nla_put_failure; |
| 2248 | #endif |
Florian Westphal | 0ceabd8 | 2013-01-11 06:30:45 +0000 | [diff] [blame] | 2249 | if (ctnetlink_dump_labels(skb, ct) < 0) |
| 2250 | goto nla_put_failure; |
Pablo Neira Ayuso | 9cb0176 | 2012-06-07 12:13:39 +0200 | [diff] [blame] | 2251 | rcu_read_unlock(); |
| 2252 | return 0; |
| 2253 | |
| 2254 | nla_put_failure: |
| 2255 | rcu_read_unlock(); |
| 2256 | return -ENOSPC; |
| 2257 | } |
| 2258 | |
| 2259 | static int |
Ken-ichirou MATSUZAWA | a4b4766 | 2015-10-05 11:47:13 +0900 | [diff] [blame] | 2260 | ctnetlink_glue_build(struct sk_buff *skb, struct nf_conn *ct, |
| 2261 | enum ip_conntrack_info ctinfo, |
| 2262 | u_int16_t ct_attr, u_int16_t ct_info_attr) |
Pablo Neira Ayuso | b7bd180 | 2015-09-30 22:53:44 +0100 | [diff] [blame] | 2263 | { |
| 2264 | struct nlattr *nest_parms; |
| 2265 | |
| 2266 | nest_parms = nla_nest_start(skb, ct_attr | NLA_F_NESTED); |
| 2267 | if (!nest_parms) |
| 2268 | goto nla_put_failure; |
| 2269 | |
Ken-ichirou MATSUZAWA | a4b4766 | 2015-10-05 11:47:13 +0900 | [diff] [blame] | 2270 | if (__ctnetlink_glue_build(skb, ct) < 0) |
Pablo Neira Ayuso | b7bd180 | 2015-09-30 22:53:44 +0100 | [diff] [blame] | 2271 | goto nla_put_failure; |
| 2272 | |
| 2273 | nla_nest_end(skb, nest_parms); |
| 2274 | |
| 2275 | if (nla_put_be32(skb, ct_info_attr, htonl(ctinfo))) |
| 2276 | goto nla_put_failure; |
| 2277 | |
| 2278 | return 0; |
| 2279 | |
| 2280 | nla_put_failure: |
| 2281 | return -ENOSPC; |
| 2282 | } |
| 2283 | |
| 2284 | static int |
Ken-ichirou MATSUZAWA | a4b4766 | 2015-10-05 11:47:13 +0900 | [diff] [blame] | 2285 | ctnetlink_glue_parse_ct(const struct nlattr *cda[], struct nf_conn *ct) |
Pablo Neira Ayuso | 9cb0176 | 2012-06-07 12:13:39 +0200 | [diff] [blame] | 2286 | { |
| 2287 | int err; |
| 2288 | |
| 2289 | if (cda[CTA_TIMEOUT]) { |
| 2290 | err = ctnetlink_change_timeout(ct, cda); |
| 2291 | if (err < 0) |
| 2292 | return err; |
| 2293 | } |
| 2294 | if (cda[CTA_STATUS]) { |
| 2295 | err = ctnetlink_change_status(ct, cda); |
| 2296 | if (err < 0) |
| 2297 | return err; |
| 2298 | } |
| 2299 | if (cda[CTA_HELP]) { |
| 2300 | err = ctnetlink_change_helper(ct, cda); |
| 2301 | if (err < 0) |
| 2302 | return err; |
| 2303 | } |
Florian Westphal | 9b21f6a | 2013-01-11 06:30:46 +0000 | [diff] [blame] | 2304 | if (cda[CTA_LABELS]) { |
| 2305 | err = ctnetlink_attach_labels(ct, cda); |
| 2306 | if (err < 0) |
| 2307 | return err; |
| 2308 | } |
Pablo Neira Ayuso | 9cb0176 | 2012-06-07 12:13:39 +0200 | [diff] [blame] | 2309 | #if defined(CONFIG_NF_CONNTRACK_MARK) |
Florian Westphal | 534473c | 2013-12-19 18:25:15 +0100 | [diff] [blame] | 2310 | if (cda[CTA_MARK]) { |
| 2311 | u32 mask = 0, mark, newmark; |
| 2312 | if (cda[CTA_MARK_MASK]) |
| 2313 | mask = ~ntohl(nla_get_be32(cda[CTA_MARK_MASK])); |
| 2314 | |
| 2315 | mark = ntohl(nla_get_be32(cda[CTA_MARK])); |
| 2316 | newmark = (ct->mark & mask) ^ mark; |
| 2317 | if (newmark != ct->mark) |
| 2318 | ct->mark = newmark; |
| 2319 | } |
Pablo Neira Ayuso | 9cb0176 | 2012-06-07 12:13:39 +0200 | [diff] [blame] | 2320 | #endif |
| 2321 | return 0; |
| 2322 | } |
| 2323 | |
| 2324 | static int |
Ken-ichirou MATSUZAWA | a4b4766 | 2015-10-05 11:47:13 +0900 | [diff] [blame] | 2325 | ctnetlink_glue_parse(const struct nlattr *attr, struct nf_conn *ct) |
Pablo Neira Ayuso | 9cb0176 | 2012-06-07 12:13:39 +0200 | [diff] [blame] | 2326 | { |
| 2327 | struct nlattr *cda[CTA_MAX+1]; |
Pablo Neira Ayuso | 68e035c | 2012-08-14 12:47:37 +0200 | [diff] [blame] | 2328 | int ret; |
Pablo Neira Ayuso | 9cb0176 | 2012-06-07 12:13:39 +0200 | [diff] [blame] | 2329 | |
Daniel Borkmann | 130ffbc | 2013-06-12 17:54:51 +0200 | [diff] [blame] | 2330 | ret = nla_parse_nested(cda, CTA_MAX, attr, ct_nla_policy); |
| 2331 | if (ret < 0) |
| 2332 | return ret; |
Pablo Neira Ayuso | 9cb0176 | 2012-06-07 12:13:39 +0200 | [diff] [blame] | 2333 | |
Jesper Dangaard Brouer | ca7433d | 2014-03-03 14:46:01 +0100 | [diff] [blame] | 2334 | spin_lock_bh(&nf_conntrack_expect_lock); |
Ken-ichirou MATSUZAWA | a4b4766 | 2015-10-05 11:47:13 +0900 | [diff] [blame] | 2335 | ret = ctnetlink_glue_parse_ct((const struct nlattr **)cda, ct); |
Jesper Dangaard Brouer | ca7433d | 2014-03-03 14:46:01 +0100 | [diff] [blame] | 2336 | spin_unlock_bh(&nf_conntrack_expect_lock); |
Pablo Neira Ayuso | 68e035c | 2012-08-14 12:47:37 +0200 | [diff] [blame] | 2337 | |
| 2338 | return ret; |
Pablo Neira Ayuso | 9cb0176 | 2012-06-07 12:13:39 +0200 | [diff] [blame] | 2339 | } |
| 2340 | |
Ken-ichirou MATSUZAWA | a4b4766 | 2015-10-05 11:47:13 +0900 | [diff] [blame] | 2341 | static int ctnetlink_glue_exp_parse(const struct nlattr * const *cda, |
| 2342 | const struct nf_conn *ct, |
| 2343 | struct nf_conntrack_tuple *tuple, |
| 2344 | struct nf_conntrack_tuple *mask) |
Pablo Neira Ayuso | bd07793 | 2013-08-07 18:13:20 +0200 | [diff] [blame] | 2345 | { |
| 2346 | int err; |
| 2347 | |
| 2348 | err = ctnetlink_parse_tuple(cda, tuple, CTA_EXPECT_TUPLE, |
Daniel Borkmann | deedb59 | 2015-08-14 16:03:39 +0200 | [diff] [blame] | 2349 | nf_ct_l3num(ct), NULL); |
Pablo Neira Ayuso | bd07793 | 2013-08-07 18:13:20 +0200 | [diff] [blame] | 2350 | if (err < 0) |
| 2351 | return err; |
| 2352 | |
| 2353 | return ctnetlink_parse_tuple(cda, mask, CTA_EXPECT_MASK, |
Daniel Borkmann | deedb59 | 2015-08-14 16:03:39 +0200 | [diff] [blame] | 2354 | nf_ct_l3num(ct), NULL); |
Pablo Neira Ayuso | bd07793 | 2013-08-07 18:13:20 +0200 | [diff] [blame] | 2355 | } |
| 2356 | |
| 2357 | static int |
Ken-ichirou MATSUZAWA | a4b4766 | 2015-10-05 11:47:13 +0900 | [diff] [blame] | 2358 | ctnetlink_glue_attach_expect(const struct nlattr *attr, struct nf_conn *ct, |
| 2359 | u32 portid, u32 report) |
Pablo Neira Ayuso | bd07793 | 2013-08-07 18:13:20 +0200 | [diff] [blame] | 2360 | { |
| 2361 | struct nlattr *cda[CTA_EXPECT_MAX+1]; |
| 2362 | struct nf_conntrack_tuple tuple, mask; |
Florian Westphal | b7e092c | 2013-08-27 11:47:26 +0200 | [diff] [blame] | 2363 | struct nf_conntrack_helper *helper = NULL; |
Pablo Neira Ayuso | bd07793 | 2013-08-07 18:13:20 +0200 | [diff] [blame] | 2364 | struct nf_conntrack_expect *exp; |
| 2365 | int err; |
| 2366 | |
| 2367 | err = nla_parse_nested(cda, CTA_EXPECT_MAX, attr, exp_nla_policy); |
| 2368 | if (err < 0) |
| 2369 | return err; |
| 2370 | |
Ken-ichirou MATSUZAWA | a4b4766 | 2015-10-05 11:47:13 +0900 | [diff] [blame] | 2371 | err = ctnetlink_glue_exp_parse((const struct nlattr * const *)cda, |
| 2372 | ct, &tuple, &mask); |
Pablo Neira Ayuso | bd07793 | 2013-08-07 18:13:20 +0200 | [diff] [blame] | 2373 | if (err < 0) |
| 2374 | return err; |
| 2375 | |
| 2376 | if (cda[CTA_EXPECT_HELP_NAME]) { |
| 2377 | const char *helpname = nla_data(cda[CTA_EXPECT_HELP_NAME]); |
| 2378 | |
| 2379 | helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct), |
| 2380 | nf_ct_protonum(ct)); |
| 2381 | if (helper == NULL) |
| 2382 | return -EOPNOTSUPP; |
| 2383 | } |
| 2384 | |
| 2385 | exp = ctnetlink_alloc_expect((const struct nlattr * const *)cda, ct, |
| 2386 | helper, &tuple, &mask); |
| 2387 | if (IS_ERR(exp)) |
| 2388 | return PTR_ERR(exp); |
| 2389 | |
| 2390 | err = nf_ct_expect_related_report(exp, portid, report); |
Liping Zhang | b18bcb0 | 2016-08-08 22:03:40 +0800 | [diff] [blame] | 2391 | nf_ct_expect_put(exp); |
| 2392 | return err; |
Pablo Neira Ayuso | bd07793 | 2013-08-07 18:13:20 +0200 | [diff] [blame] | 2393 | } |
| 2394 | |
Ken-ichirou MATSUZAWA | a4b4766 | 2015-10-05 11:47:13 +0900 | [diff] [blame] | 2395 | static void ctnetlink_glue_seqadj(struct sk_buff *skb, struct nf_conn *ct, |
| 2396 | enum ip_conntrack_info ctinfo, int diff) |
Pablo Neira Ayuso | b7bd180 | 2015-09-30 22:53:44 +0100 | [diff] [blame] | 2397 | { |
| 2398 | if (!(ct->status & IPS_NAT_MASK)) |
| 2399 | return; |
| 2400 | |
| 2401 | nf_ct_tcp_seqadj_set(skb, ct, ctinfo, diff); |
| 2402 | } |
| 2403 | |
Ken-ichirou MATSUZAWA | a4b4766 | 2015-10-05 11:47:13 +0900 | [diff] [blame] | 2404 | static struct nfnl_ct_hook ctnetlink_glue_hook = { |
| 2405 | .get_ct = ctnetlink_glue_get_ct, |
| 2406 | .build_size = ctnetlink_glue_build_size, |
| 2407 | .build = ctnetlink_glue_build, |
| 2408 | .parse = ctnetlink_glue_parse, |
| 2409 | .attach_expect = ctnetlink_glue_attach_expect, |
| 2410 | .seq_adjust = ctnetlink_glue_seqadj, |
Pablo Neira Ayuso | 9cb0176 | 2012-06-07 12:13:39 +0200 | [diff] [blame] | 2411 | }; |
Ken-ichirou MATSUZAWA | 83f3e94 | 2015-10-05 11:48:47 +0900 | [diff] [blame] | 2412 | #endif /* CONFIG_NETFILTER_NETLINK_GLUE_CT */ |
Pablo Neira Ayuso | 9cb0176 | 2012-06-07 12:13:39 +0200 | [diff] [blame] | 2413 | |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 2414 | /*********************************************************************** |
| 2415 | * EXPECT |
| 2416 | ***********************************************************************/ |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2417 | |
Pablo Neira Ayuso | 4054ff4 | 2016-04-12 23:32:34 +0200 | [diff] [blame] | 2418 | static int ctnetlink_exp_dump_tuple(struct sk_buff *skb, |
| 2419 | const struct nf_conntrack_tuple *tuple, |
Matthias Kaehlcke | 3e8f962 | 2017-04-19 11:39:20 -0700 | [diff] [blame] | 2420 | u32 type) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2421 | { |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2422 | struct nlattr *nest_parms; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 2423 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2424 | nest_parms = nla_nest_start(skb, type | NLA_F_NESTED); |
| 2425 | if (!nest_parms) |
| 2426 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2427 | if (ctnetlink_dump_tuples(skb, tuple) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2428 | goto nla_put_failure; |
| 2429 | nla_nest_end(skb, nest_parms); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2430 | |
| 2431 | return 0; |
| 2432 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2433 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2434 | return -1; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 2435 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2436 | |
Pablo Neira Ayuso | 4054ff4 | 2016-04-12 23:32:34 +0200 | [diff] [blame] | 2437 | static int ctnetlink_exp_dump_mask(struct sk_buff *skb, |
| 2438 | const struct nf_conntrack_tuple *tuple, |
| 2439 | const struct nf_conntrack_tuple_mask *mask) |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 2440 | { |
| 2441 | int ret; |
| 2442 | struct nf_conntrack_l3proto *l3proto; |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 2443 | struct nf_conntrack_l4proto *l4proto; |
Patrick McHardy | d4156e8 | 2007-07-07 22:31:32 -0700 | [diff] [blame] | 2444 | struct nf_conntrack_tuple m; |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2445 | struct nlattr *nest_parms; |
Patrick McHardy | d4156e8 | 2007-07-07 22:31:32 -0700 | [diff] [blame] | 2446 | |
| 2447 | memset(&m, 0xFF, sizeof(m)); |
Patrick McHardy | d4156e8 | 2007-07-07 22:31:32 -0700 | [diff] [blame] | 2448 | memcpy(&m.src.u3, &mask->src.u3, sizeof(m.src.u3)); |
Patrick McHardy | e578756 | 2010-01-26 17:04:02 +0100 | [diff] [blame] | 2449 | m.src.u.all = mask->src.u.all; |
| 2450 | m.dst.protonum = tuple->dst.protonum; |
Patrick McHardy | d4156e8 | 2007-07-07 22:31:32 -0700 | [diff] [blame] | 2451 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2452 | nest_parms = nla_nest_start(skb, CTA_EXPECT_MASK | NLA_F_NESTED); |
| 2453 | if (!nest_parms) |
| 2454 | goto nla_put_failure; |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 2455 | |
Hans Schillstrom | 3b988ec | 2012-03-05 02:24:29 +0000 | [diff] [blame] | 2456 | rcu_read_lock(); |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 2457 | l3proto = __nf_ct_l3proto_find(tuple->src.l3num); |
Patrick McHardy | d4156e8 | 2007-07-07 22:31:32 -0700 | [diff] [blame] | 2458 | ret = ctnetlink_dump_tuples_ip(skb, &m, l3proto); |
Hans Schillstrom | 3b988ec | 2012-03-05 02:24:29 +0000 | [diff] [blame] | 2459 | if (ret >= 0) { |
| 2460 | l4proto = __nf_ct_l4proto_find(tuple->src.l3num, |
| 2461 | tuple->dst.protonum); |
Patrick McHardy | d4156e8 | 2007-07-07 22:31:32 -0700 | [diff] [blame] | 2462 | ret = ctnetlink_dump_tuples_proto(skb, &m, l4proto); |
Hans Schillstrom | 3b988ec | 2012-03-05 02:24:29 +0000 | [diff] [blame] | 2463 | } |
| 2464 | rcu_read_unlock(); |
| 2465 | |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 2466 | if (unlikely(ret < 0)) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2467 | goto nla_put_failure; |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 2468 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2469 | nla_nest_end(skb, nest_parms); |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 2470 | |
| 2471 | return 0; |
| 2472 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2473 | nla_put_failure: |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 2474 | return -1; |
| 2475 | } |
| 2476 | |
Patrick McHardy | c7232c9 | 2012-08-26 19:14:06 +0200 | [diff] [blame] | 2477 | static const union nf_inet_addr any_addr; |
| 2478 | |
Florian Westphal | 1922476 | 2019-08-17 00:01:34 +0100 | [diff] [blame^] | 2479 | static __be32 nf_expect_get_id(const struct nf_conntrack_expect *exp) |
| 2480 | { |
| 2481 | static __read_mostly siphash_key_t exp_id_seed; |
| 2482 | unsigned long a, b, c, d; |
| 2483 | |
| 2484 | net_get_random_once(&exp_id_seed, sizeof(exp_id_seed)); |
| 2485 | |
| 2486 | a = (unsigned long)exp; |
| 2487 | b = (unsigned long)exp->helper; |
| 2488 | c = (unsigned long)exp->master; |
| 2489 | d = (unsigned long)siphash(&exp->tuple, sizeof(exp->tuple), &exp_id_seed); |
| 2490 | |
| 2491 | #ifdef CONFIG_64BIT |
| 2492 | return (__force __be32)siphash_4u64((u64)a, (u64)b, (u64)c, (u64)d, &exp_id_seed); |
| 2493 | #else |
| 2494 | return (__force __be32)siphash_4u32((u32)a, (u32)b, (u32)c, (u32)d, &exp_id_seed); |
| 2495 | #endif |
| 2496 | } |
| 2497 | |
Ilpo Järvinen | bb5cf80 | 2008-01-05 23:11:31 -0800 | [diff] [blame] | 2498 | static int |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2499 | ctnetlink_exp_dump_expect(struct sk_buff *skb, |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 2500 | const struct nf_conntrack_expect *exp) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2501 | { |
| 2502 | struct nf_conn *master = exp->master; |
Xi Wang | c121638 | 2011-12-30 10:40:17 -0500 | [diff] [blame] | 2503 | long timeout = ((long)exp->timeout.expires - (long)jiffies) / HZ; |
Pablo Neira Ayuso | bc01befd | 2010-09-28 21:06:34 +0200 | [diff] [blame] | 2504 | struct nf_conn_help *help; |
Pablo Neira Ayuso | 076a0ca | 2012-02-05 03:41:52 +0100 | [diff] [blame] | 2505 | #ifdef CONFIG_NF_NAT_NEEDED |
| 2506 | struct nlattr *nest_parms; |
| 2507 | struct nf_conntrack_tuple nat_tuple = {}; |
| 2508 | #endif |
Pablo Neira Ayuso | 544d5c7 | 2012-02-05 03:44:51 +0100 | [diff] [blame] | 2509 | struct nf_ct_helper_expectfn *expfn; |
| 2510 | |
Patrick McHardy | d978e5d | 2007-12-17 22:37:03 -0800 | [diff] [blame] | 2511 | if (timeout < 0) |
| 2512 | timeout = 0; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2513 | |
| 2514 | if (ctnetlink_exp_dump_tuple(skb, &exp->tuple, CTA_EXPECT_TUPLE) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2515 | goto nla_put_failure; |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 2516 | if (ctnetlink_exp_dump_mask(skb, &exp->tuple, &exp->mask) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2517 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2518 | if (ctnetlink_exp_dump_tuple(skb, |
| 2519 | &master->tuplehash[IP_CT_DIR_ORIGINAL].tuple, |
| 2520 | CTA_EXPECT_MASTER) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2521 | goto nla_put_failure; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 2522 | |
Pablo Neira Ayuso | 076a0ca | 2012-02-05 03:41:52 +0100 | [diff] [blame] | 2523 | #ifdef CONFIG_NF_NAT_NEEDED |
Patrick McHardy | c7232c9 | 2012-08-26 19:14:06 +0200 | [diff] [blame] | 2524 | if (!nf_inet_addr_cmp(&exp->saved_addr, &any_addr) || |
| 2525 | exp->saved_proto.all) { |
Pablo Neira Ayuso | 076a0ca | 2012-02-05 03:41:52 +0100 | [diff] [blame] | 2526 | nest_parms = nla_nest_start(skb, CTA_EXPECT_NAT | NLA_F_NESTED); |
| 2527 | if (!nest_parms) |
| 2528 | goto nla_put_failure; |
| 2529 | |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 2530 | if (nla_put_be32(skb, CTA_EXPECT_NAT_DIR, htonl(exp->dir))) |
| 2531 | goto nla_put_failure; |
Pablo Neira Ayuso | 076a0ca | 2012-02-05 03:41:52 +0100 | [diff] [blame] | 2532 | |
| 2533 | nat_tuple.src.l3num = nf_ct_l3num(master); |
Patrick McHardy | c7232c9 | 2012-08-26 19:14:06 +0200 | [diff] [blame] | 2534 | nat_tuple.src.u3 = exp->saved_addr; |
Pablo Neira Ayuso | 076a0ca | 2012-02-05 03:41:52 +0100 | [diff] [blame] | 2535 | nat_tuple.dst.protonum = nf_ct_protonum(master); |
| 2536 | nat_tuple.src.u = exp->saved_proto; |
| 2537 | |
| 2538 | if (ctnetlink_exp_dump_tuple(skb, &nat_tuple, |
| 2539 | CTA_EXPECT_NAT_TUPLE) < 0) |
| 2540 | goto nla_put_failure; |
| 2541 | nla_nest_end(skb, nest_parms); |
| 2542 | } |
| 2543 | #endif |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 2544 | if (nla_put_be32(skb, CTA_EXPECT_TIMEOUT, htonl(timeout)) || |
Florian Westphal | 1922476 | 2019-08-17 00:01:34 +0100 | [diff] [blame^] | 2545 | nla_put_be32(skb, CTA_EXPECT_ID, nf_expect_get_id(exp)) || |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 2546 | nla_put_be32(skb, CTA_EXPECT_FLAGS, htonl(exp->flags)) || |
| 2547 | nla_put_be32(skb, CTA_EXPECT_CLASS, htonl(exp->class))) |
| 2548 | goto nla_put_failure; |
Pablo Neira Ayuso | bc01befd | 2010-09-28 21:06:34 +0200 | [diff] [blame] | 2549 | help = nfct_help(master); |
| 2550 | if (help) { |
| 2551 | struct nf_conntrack_helper *helper; |
| 2552 | |
| 2553 | helper = rcu_dereference(help->helper); |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 2554 | if (helper && |
| 2555 | nla_put_string(skb, CTA_EXPECT_HELP_NAME, helper->name)) |
| 2556 | goto nla_put_failure; |
Pablo Neira Ayuso | bc01befd | 2010-09-28 21:06:34 +0200 | [diff] [blame] | 2557 | } |
Pablo Neira Ayuso | 544d5c7 | 2012-02-05 03:44:51 +0100 | [diff] [blame] | 2558 | expfn = nf_ct_helper_expectfn_find_by_symbol(exp->expectfn); |
David S. Miller | cc1eb43 | 2012-04-01 18:57:48 -0400 | [diff] [blame] | 2559 | if (expfn != NULL && |
| 2560 | nla_put_string(skb, CTA_EXPECT_FN, expfn->name)) |
| 2561 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2562 | |
| 2563 | return 0; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 2564 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2565 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2566 | return -1; |
| 2567 | } |
| 2568 | |
| 2569 | static int |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2570 | 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] | 2571 | int event, const struct nf_conntrack_expect *exp) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2572 | { |
| 2573 | struct nlmsghdr *nlh; |
| 2574 | struct nfgenmsg *nfmsg; |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2575 | unsigned int flags = portid ? NLM_F_MULTI : 0; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2576 | |
| 2577 | event |= NFNL_SUBSYS_CTNETLINK_EXP << 8; |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2578 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags); |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 2579 | if (nlh == NULL) |
| 2580 | goto nlmsg_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2581 | |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 2582 | nfmsg = nlmsg_data(nlh); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2583 | nfmsg->nfgen_family = exp->tuple.src.l3num; |
| 2584 | nfmsg->version = NFNETLINK_V0; |
| 2585 | nfmsg->res_id = 0; |
| 2586 | |
| 2587 | if (ctnetlink_exp_dump_expect(skb, exp) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2588 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2589 | |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 2590 | nlmsg_end(skb, nlh); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2591 | return skb->len; |
| 2592 | |
| 2593 | nlmsg_failure: |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2594 | nla_put_failure: |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 2595 | nlmsg_cancel(skb, nlh); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2596 | return -1; |
| 2597 | } |
| 2598 | |
| 2599 | #ifdef CONFIG_NF_CONNTRACK_EVENTS |
Pablo Neira Ayuso | e34d5c1 | 2009-06-03 10:32:06 +0200 | [diff] [blame] | 2600 | static int |
| 2601 | ctnetlink_expect_event(unsigned int events, struct nf_exp_event *item) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2602 | { |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 2603 | struct nf_conntrack_expect *exp = item->exp; |
| 2604 | struct net *net = nf_ct_exp_net(exp); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2605 | struct nlmsghdr *nlh; |
| 2606 | struct nfgenmsg *nfmsg; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2607 | struct sk_buff *skb; |
Pablo Neira Ayuso | ebbf41d | 2010-10-19 10:19:06 +0200 | [diff] [blame] | 2608 | unsigned int type, group; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2609 | int flags = 0; |
| 2610 | |
Pablo Neira Ayuso | ebbf41d | 2010-10-19 10:19:06 +0200 | [diff] [blame] | 2611 | if (events & (1 << IPEXP_DESTROY)) { |
| 2612 | type = IPCTNL_MSG_EXP_DELETE; |
| 2613 | group = NFNLGRP_CONNTRACK_EXP_DESTROY; |
| 2614 | } else if (events & (1 << IPEXP_NEW)) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2615 | type = IPCTNL_MSG_EXP_NEW; |
| 2616 | flags = NLM_F_CREATE|NLM_F_EXCL; |
Pablo Neira Ayuso | ebbf41d | 2010-10-19 10:19:06 +0200 | [diff] [blame] | 2617 | group = NFNLGRP_CONNTRACK_EXP_NEW; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2618 | } else |
Pablo Neira Ayuso | e34d5c1 | 2009-06-03 10:32:06 +0200 | [diff] [blame] | 2619 | return 0; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2620 | |
Pablo Neira Ayuso | ebbf41d | 2010-10-19 10:19:06 +0200 | [diff] [blame] | 2621 | if (!item->report && !nfnetlink_has_listeners(net, group)) |
Pablo Neira Ayuso | e34d5c1 | 2009-06-03 10:32:06 +0200 | [diff] [blame] | 2622 | return 0; |
Pablo Neira Ayuso | b3a27bf | 2006-08-22 00:32:05 -0700 | [diff] [blame] | 2623 | |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 2624 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
| 2625 | if (skb == NULL) |
Pablo Neira Ayuso | 150ace0 | 2009-04-17 17:47:31 +0200 | [diff] [blame] | 2626 | goto errout; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2627 | |
Marcus Sundberg | b633ad5 | 2006-02-04 02:11:09 -0800 | [diff] [blame] | 2628 | type |= NFNL_SUBSYS_CTNETLINK_EXP << 8; |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2629 | nlh = nlmsg_put(skb, item->portid, 0, type, sizeof(*nfmsg), flags); |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 2630 | if (nlh == NULL) |
| 2631 | goto nlmsg_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2632 | |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 2633 | nfmsg = nlmsg_data(nlh); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2634 | nfmsg->nfgen_family = exp->tuple.src.l3num; |
| 2635 | nfmsg->version = NFNETLINK_V0; |
| 2636 | nfmsg->res_id = 0; |
| 2637 | |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 2638 | rcu_read_lock(); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2639 | if (ctnetlink_exp_dump_expect(skb, exp) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2640 | goto nla_put_failure; |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 2641 | rcu_read_unlock(); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2642 | |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 2643 | nlmsg_end(skb, nlh); |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2644 | nfnetlink_send(skb, net, item->portid, group, item->report, GFP_ATOMIC); |
Pablo Neira Ayuso | e34d5c1 | 2009-06-03 10:32:06 +0200 | [diff] [blame] | 2645 | return 0; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2646 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2647 | nla_put_failure: |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 2648 | rcu_read_unlock(); |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 2649 | nlmsg_cancel(skb, nlh); |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 2650 | nlmsg_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2651 | kfree_skb(skb); |
Pablo Neira Ayuso | 150ace0 | 2009-04-17 17:47:31 +0200 | [diff] [blame] | 2652 | errout: |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 2653 | nfnetlink_set_err(net, 0, 0, -ENOBUFS); |
Pablo Neira Ayuso | e34d5c1 | 2009-06-03 10:32:06 +0200 | [diff] [blame] | 2654 | return 0; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2655 | } |
| 2656 | #endif |
Patrick McHardy | cf6994c | 2007-07-07 22:32:34 -0700 | [diff] [blame] | 2657 | static int ctnetlink_exp_done(struct netlink_callback *cb) |
| 2658 | { |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 2659 | if (cb->args[1]) |
| 2660 | nf_ct_expect_put((struct nf_conntrack_expect *)cb->args[1]); |
Patrick McHardy | cf6994c | 2007-07-07 22:32:34 -0700 | [diff] [blame] | 2661 | return 0; |
| 2662 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2663 | |
| 2664 | static int |
| 2665 | ctnetlink_exp_dump_table(struct sk_buff *skb, struct netlink_callback *cb) |
| 2666 | { |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 2667 | struct net *net = sock_net(skb->sk); |
Patrick McHardy | cf6994c | 2007-07-07 22:32:34 -0700 | [diff] [blame] | 2668 | struct nf_conntrack_expect *exp, *last; |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 2669 | struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh); |
Pablo Neira Ayuso | 87711cb | 2006-01-05 12:19:23 -0800 | [diff] [blame] | 2670 | u_int8_t l3proto = nfmsg->nfgen_family; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2671 | |
Patrick McHardy | 7d0742d | 2008-01-31 04:38:19 -0800 | [diff] [blame] | 2672 | rcu_read_lock(); |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 2673 | last = (struct nf_conntrack_expect *)cb->args[1]; |
| 2674 | for (; cb->args[0] < nf_ct_expect_hsize; cb->args[0]++) { |
Patrick McHardy | cf6994c | 2007-07-07 22:32:34 -0700 | [diff] [blame] | 2675 | restart: |
Florian Westphal | 0a93aae | 2016-05-06 00:51:49 +0200 | [diff] [blame] | 2676 | hlist_for_each_entry(exp, &nf_ct_expect_hash[cb->args[0]], |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 2677 | hnode) { |
| 2678 | if (l3proto && exp->tuple.src.l3num != l3proto) |
Patrick McHardy | cf6994c | 2007-07-07 22:32:34 -0700 | [diff] [blame] | 2679 | continue; |
Florian Westphal | 03d7dc5 | 2016-05-06 00:51:47 +0200 | [diff] [blame] | 2680 | |
| 2681 | if (!net_eq(nf_ct_net(exp->master), net)) |
| 2682 | continue; |
| 2683 | |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 2684 | if (cb->args[1]) { |
| 2685 | if (exp != last) |
| 2686 | continue; |
| 2687 | cb->args[1] = 0; |
| 2688 | } |
Pablo Neira Ayuso | 8b0a231 | 2009-06-02 20:03:34 +0200 | [diff] [blame] | 2689 | if (ctnetlink_exp_fill_info(skb, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2690 | NETLINK_CB(cb->skb).portid, |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 2691 | cb->nlh->nlmsg_seq, |
| 2692 | IPCTNL_MSG_EXP_NEW, |
Pablo Neira Ayuso | 8b0a231 | 2009-06-02 20:03:34 +0200 | [diff] [blame] | 2693 | exp) < 0) { |
Patrick McHardy | 7d0742d | 2008-01-31 04:38:19 -0800 | [diff] [blame] | 2694 | if (!atomic_inc_not_zero(&exp->use)) |
| 2695 | continue; |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 2696 | cb->args[1] = (unsigned long)exp; |
| 2697 | goto out; |
| 2698 | } |
Patrick McHardy | cf6994c | 2007-07-07 22:32:34 -0700 | [diff] [blame] | 2699 | } |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 2700 | if (cb->args[1]) { |
| 2701 | cb->args[1] = 0; |
| 2702 | goto restart; |
Patrick McHardy | cf6994c | 2007-07-07 22:32:34 -0700 | [diff] [blame] | 2703 | } |
| 2704 | } |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 2705 | out: |
Patrick McHardy | 7d0742d | 2008-01-31 04:38:19 -0800 | [diff] [blame] | 2706 | rcu_read_unlock(); |
Patrick McHardy | cf6994c | 2007-07-07 22:32:34 -0700 | [diff] [blame] | 2707 | if (last) |
| 2708 | nf_ct_expect_put(last); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2709 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2710 | return skb->len; |
| 2711 | } |
| 2712 | |
Pablo Neira Ayuso | e844a92 | 2013-03-17 23:21:36 +0000 | [diff] [blame] | 2713 | static int |
| 2714 | ctnetlink_exp_ct_dump_table(struct sk_buff *skb, struct netlink_callback *cb) |
| 2715 | { |
| 2716 | struct nf_conntrack_expect *exp, *last; |
| 2717 | struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh); |
| 2718 | struct nf_conn *ct = cb->data; |
| 2719 | struct nf_conn_help *help = nfct_help(ct); |
| 2720 | u_int8_t l3proto = nfmsg->nfgen_family; |
| 2721 | |
| 2722 | if (cb->args[0]) |
| 2723 | return 0; |
| 2724 | |
| 2725 | rcu_read_lock(); |
| 2726 | last = (struct nf_conntrack_expect *)cb->args[1]; |
| 2727 | restart: |
| 2728 | hlist_for_each_entry(exp, &help->expectations, lnode) { |
| 2729 | if (l3proto && exp->tuple.src.l3num != l3proto) |
| 2730 | continue; |
| 2731 | if (cb->args[1]) { |
| 2732 | if (exp != last) |
| 2733 | continue; |
| 2734 | cb->args[1] = 0; |
| 2735 | } |
| 2736 | if (ctnetlink_exp_fill_info(skb, NETLINK_CB(cb->skb).portid, |
| 2737 | cb->nlh->nlmsg_seq, |
| 2738 | IPCTNL_MSG_EXP_NEW, |
| 2739 | exp) < 0) { |
| 2740 | if (!atomic_inc_not_zero(&exp->use)) |
| 2741 | continue; |
| 2742 | cb->args[1] = (unsigned long)exp; |
| 2743 | goto out; |
| 2744 | } |
| 2745 | } |
| 2746 | if (cb->args[1]) { |
| 2747 | cb->args[1] = 0; |
| 2748 | goto restart; |
| 2749 | } |
| 2750 | cb->args[0] = 1; |
| 2751 | out: |
| 2752 | rcu_read_unlock(); |
| 2753 | if (last) |
| 2754 | nf_ct_expect_put(last); |
| 2755 | |
| 2756 | return skb->len; |
| 2757 | } |
| 2758 | |
Pablo Neira Ayuso | 7b8002a | 2015-12-15 18:41:56 +0100 | [diff] [blame] | 2759 | static int ctnetlink_dump_exp_ct(struct net *net, struct sock *ctnl, |
| 2760 | struct sk_buff *skb, |
Pablo Neira Ayuso | e844a92 | 2013-03-17 23:21:36 +0000 | [diff] [blame] | 2761 | const struct nlmsghdr *nlh, |
| 2762 | const struct nlattr * const cda[]) |
| 2763 | { |
| 2764 | int err; |
Pablo Neira Ayuso | e844a92 | 2013-03-17 23:21:36 +0000 | [diff] [blame] | 2765 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
| 2766 | u_int8_t u3 = nfmsg->nfgen_family; |
| 2767 | struct nf_conntrack_tuple tuple; |
| 2768 | struct nf_conntrack_tuple_hash *h; |
| 2769 | struct nf_conn *ct; |
Daniel Borkmann | 308ac91 | 2015-08-08 21:40:01 +0200 | [diff] [blame] | 2770 | struct nf_conntrack_zone zone; |
Pablo Neira Ayuso | e844a92 | 2013-03-17 23:21:36 +0000 | [diff] [blame] | 2771 | struct netlink_dump_control c = { |
| 2772 | .dump = ctnetlink_exp_ct_dump_table, |
| 2773 | .done = ctnetlink_exp_done, |
| 2774 | }; |
| 2775 | |
Daniel Borkmann | deedb59 | 2015-08-14 16:03:39 +0200 | [diff] [blame] | 2776 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_MASTER, |
| 2777 | u3, NULL); |
Pablo Neira Ayuso | e844a92 | 2013-03-17 23:21:36 +0000 | [diff] [blame] | 2778 | if (err < 0) |
| 2779 | return err; |
| 2780 | |
Daniel Borkmann | 308ac91 | 2015-08-08 21:40:01 +0200 | [diff] [blame] | 2781 | err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone); |
| 2782 | if (err < 0) |
| 2783 | return err; |
Pablo Neira Ayuso | e844a92 | 2013-03-17 23:21:36 +0000 | [diff] [blame] | 2784 | |
Daniel Borkmann | 308ac91 | 2015-08-08 21:40:01 +0200 | [diff] [blame] | 2785 | h = nf_conntrack_find_get(net, &zone, &tuple); |
Pablo Neira Ayuso | e844a92 | 2013-03-17 23:21:36 +0000 | [diff] [blame] | 2786 | if (!h) |
| 2787 | return -ENOENT; |
| 2788 | |
| 2789 | ct = nf_ct_tuplehash_to_ctrack(h); |
| 2790 | c.data = ct; |
| 2791 | |
| 2792 | err = netlink_dump_start(ctnl, skb, nlh, &c); |
| 2793 | nf_ct_put(ct); |
| 2794 | |
| 2795 | return err; |
| 2796 | } |
| 2797 | |
Pablo Neira Ayuso | 7b8002a | 2015-12-15 18:41:56 +0100 | [diff] [blame] | 2798 | static int ctnetlink_get_expect(struct net *net, struct sock *ctnl, |
| 2799 | struct sk_buff *skb, const struct nlmsghdr *nlh, |
| 2800 | const struct nlattr * const cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2801 | { |
| 2802 | struct nf_conntrack_tuple tuple; |
| 2803 | struct nf_conntrack_expect *exp; |
| 2804 | struct sk_buff *skb2; |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 2805 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2806 | u_int8_t u3 = nfmsg->nfgen_family; |
Daniel Borkmann | 308ac91 | 2015-08-08 21:40:01 +0200 | [diff] [blame] | 2807 | struct nf_conntrack_zone zone; |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 2808 | int err; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2809 | |
David S. Miller | b8f3ab4 | 2011-01-18 12:40:38 -0800 | [diff] [blame] | 2810 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
Pablo Neira Ayuso | e844a92 | 2013-03-17 23:21:36 +0000 | [diff] [blame] | 2811 | if (cda[CTA_EXPECT_MASTER]) |
Pablo Neira Ayuso | 7b8002a | 2015-12-15 18:41:56 +0100 | [diff] [blame] | 2812 | return ctnetlink_dump_exp_ct(net, ctnl, skb, nlh, cda); |
Pablo Neira Ayuso | e844a92 | 2013-03-17 23:21:36 +0000 | [diff] [blame] | 2813 | else { |
| 2814 | struct netlink_dump_control c = { |
| 2815 | .dump = ctnetlink_exp_dump_table, |
| 2816 | .done = ctnetlink_exp_done, |
| 2817 | }; |
| 2818 | return netlink_dump_start(ctnl, skb, nlh, &c); |
| 2819 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2820 | } |
| 2821 | |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 2822 | err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone); |
| 2823 | if (err < 0) |
| 2824 | return err; |
| 2825 | |
Pablo Neira Ayuso | 35dba1d | 2011-12-14 12:45:22 +0100 | [diff] [blame] | 2826 | if (cda[CTA_EXPECT_TUPLE]) |
Daniel Borkmann | deedb59 | 2015-08-14 16:03:39 +0200 | [diff] [blame] | 2827 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, |
| 2828 | u3, NULL); |
Pablo Neira Ayuso | 35dba1d | 2011-12-14 12:45:22 +0100 | [diff] [blame] | 2829 | else if (cda[CTA_EXPECT_MASTER]) |
Daniel Borkmann | deedb59 | 2015-08-14 16:03:39 +0200 | [diff] [blame] | 2830 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_MASTER, |
| 2831 | u3, NULL); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2832 | else |
| 2833 | return -EINVAL; |
| 2834 | |
| 2835 | if (err < 0) |
| 2836 | return err; |
| 2837 | |
Daniel Borkmann | 308ac91 | 2015-08-08 21:40:01 +0200 | [diff] [blame] | 2838 | exp = nf_ct_expect_find_get(net, &zone, &tuple); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2839 | if (!exp) |
| 2840 | return -ENOENT; |
| 2841 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2842 | if (cda[CTA_EXPECT_ID]) { |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 2843 | __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]); |
Florian Westphal | 1922476 | 2019-08-17 00:01:34 +0100 | [diff] [blame^] | 2844 | |
| 2845 | if (id != nf_expect_get_id(exp)) { |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 2846 | nf_ct_expect_put(exp); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2847 | return -ENOENT; |
| 2848 | } |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 2849 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2850 | |
| 2851 | err = -ENOMEM; |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 2852 | skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
Pablo Neira Ayuso | 81378f7 | 2011-12-24 19:03:46 +0100 | [diff] [blame] | 2853 | if (skb2 == NULL) { |
| 2854 | nf_ct_expect_put(exp); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2855 | goto out; |
Pablo Neira Ayuso | 81378f7 | 2011-12-24 19:03:46 +0100 | [diff] [blame] | 2856 | } |
Thomas Graf | 4e9b826 | 2006-11-27 09:25:58 -0800 | [diff] [blame] | 2857 | |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 2858 | rcu_read_lock(); |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2859 | err = ctnetlink_exp_fill_info(skb2, NETLINK_CB(skb).portid, |
Pablo Neira Ayuso | 8b0a231 | 2009-06-02 20:03:34 +0200 | [diff] [blame] | 2860 | nlh->nlmsg_seq, IPCTNL_MSG_EXP_NEW, exp); |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 2861 | rcu_read_unlock(); |
Pablo Neira Ayuso | 81378f7 | 2011-12-24 19:03:46 +0100 | [diff] [blame] | 2862 | nf_ct_expect_put(exp); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2863 | if (err <= 0) |
| 2864 | goto free; |
| 2865 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2866 | err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).portid, MSG_DONTWAIT); |
Pablo Neira Ayuso | 81378f7 | 2011-12-24 19:03:46 +0100 | [diff] [blame] | 2867 | if (err < 0) |
| 2868 | goto out; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2869 | |
Pablo Neira Ayuso | 81378f7 | 2011-12-24 19:03:46 +0100 | [diff] [blame] | 2870 | return 0; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2871 | |
| 2872 | free: |
| 2873 | kfree_skb(skb2); |
| 2874 | out: |
Pablo Neira Ayuso | 81378f7 | 2011-12-24 19:03:46 +0100 | [diff] [blame] | 2875 | /* this avoids a loop in nfnetlink. */ |
| 2876 | return err == -EAGAIN ? -ENOBUFS : err; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2877 | } |
| 2878 | |
Pablo Neira Ayuso | 7b8002a | 2015-12-15 18:41:56 +0100 | [diff] [blame] | 2879 | static int ctnetlink_del_expect(struct net *net, struct sock *ctnl, |
| 2880 | struct sk_buff *skb, const struct nlmsghdr *nlh, |
| 2881 | const struct nlattr * const cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2882 | { |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 2883 | struct nf_conntrack_expect *exp; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2884 | struct nf_conntrack_tuple tuple; |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 2885 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 2886 | struct hlist_node *next; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2887 | u_int8_t u3 = nfmsg->nfgen_family; |
Daniel Borkmann | 308ac91 | 2015-08-08 21:40:01 +0200 | [diff] [blame] | 2888 | struct nf_conntrack_zone zone; |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 2889 | unsigned int i; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2890 | int err; |
| 2891 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2892 | if (cda[CTA_EXPECT_TUPLE]) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2893 | /* delete a single expect by tuple */ |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 2894 | err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone); |
| 2895 | if (err < 0) |
| 2896 | return err; |
| 2897 | |
Daniel Borkmann | deedb59 | 2015-08-14 16:03:39 +0200 | [diff] [blame] | 2898 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, |
| 2899 | u3, NULL); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2900 | if (err < 0) |
| 2901 | return err; |
| 2902 | |
| 2903 | /* bump usage count to 2 */ |
Daniel Borkmann | 308ac91 | 2015-08-08 21:40:01 +0200 | [diff] [blame] | 2904 | exp = nf_ct_expect_find_get(net, &zone, &tuple); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2905 | if (!exp) |
| 2906 | return -ENOENT; |
| 2907 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2908 | if (cda[CTA_EXPECT_ID]) { |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 2909 | __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]); |
Patrick McHardy | 3583240 | 2007-09-28 14:41:50 -0700 | [diff] [blame] | 2910 | if (ntohl(id) != (u32)(unsigned long)exp) { |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 2911 | nf_ct_expect_put(exp); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2912 | return -ENOENT; |
| 2913 | } |
| 2914 | } |
| 2915 | |
| 2916 | /* after list removal, usage count == 1 */ |
Jesper Dangaard Brouer | ca7433d | 2014-03-03 14:46:01 +0100 | [diff] [blame] | 2917 | spin_lock_bh(&nf_conntrack_expect_lock); |
Pablo Neira Ayuso | ebbf41d | 2010-10-19 10:19:06 +0200 | [diff] [blame] | 2918 | if (del_timer(&exp->timeout)) { |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2919 | nf_ct_unlink_expect_report(exp, NETLINK_CB(skb).portid, |
Pablo Neira Ayuso | ebbf41d | 2010-10-19 10:19:06 +0200 | [diff] [blame] | 2920 | nlmsg_report(nlh)); |
| 2921 | nf_ct_expect_put(exp); |
| 2922 | } |
Jesper Dangaard Brouer | ca7433d | 2014-03-03 14:46:01 +0100 | [diff] [blame] | 2923 | spin_unlock_bh(&nf_conntrack_expect_lock); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 2924 | /* have to put what we 'get' above. |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2925 | * after this line usage count == 0 */ |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 2926 | nf_ct_expect_put(exp); |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 2927 | } else if (cda[CTA_EXPECT_HELP_NAME]) { |
| 2928 | char *name = nla_data(cda[CTA_EXPECT_HELP_NAME]); |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 2929 | struct nf_conn_help *m_help; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2930 | |
| 2931 | /* delete all expectations for this helper */ |
Jesper Dangaard Brouer | ca7433d | 2014-03-03 14:46:01 +0100 | [diff] [blame] | 2932 | spin_lock_bh(&nf_conntrack_expect_lock); |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 2933 | for (i = 0; i < nf_ct_expect_hsize; i++) { |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 2934 | hlist_for_each_entry_safe(exp, next, |
Florian Westphal | 0a93aae | 2016-05-06 00:51:49 +0200 | [diff] [blame] | 2935 | &nf_ct_expect_hash[i], |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 2936 | hnode) { |
Florian Westphal | 03d7dc5 | 2016-05-06 00:51:47 +0200 | [diff] [blame] | 2937 | |
| 2938 | if (!net_eq(nf_ct_exp_net(exp), net)) |
| 2939 | continue; |
| 2940 | |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 2941 | m_help = nfct_help(exp->master); |
Patrick McHardy | 794e687 | 2010-02-03 13:41:29 +0100 | [diff] [blame] | 2942 | if (!strcmp(m_help->helper->name, name) && |
| 2943 | del_timer(&exp->timeout)) { |
Pablo Neira Ayuso | ebbf41d | 2010-10-19 10:19:06 +0200 | [diff] [blame] | 2944 | nf_ct_unlink_expect_report(exp, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2945 | NETLINK_CB(skb).portid, |
Pablo Neira Ayuso | ebbf41d | 2010-10-19 10:19:06 +0200 | [diff] [blame] | 2946 | nlmsg_report(nlh)); |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 2947 | nf_ct_expect_put(exp); |
| 2948 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2949 | } |
| 2950 | } |
Jesper Dangaard Brouer | ca7433d | 2014-03-03 14:46:01 +0100 | [diff] [blame] | 2951 | spin_unlock_bh(&nf_conntrack_expect_lock); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2952 | } else { |
| 2953 | /* This basically means we have to flush everything*/ |
Jesper Dangaard Brouer | ca7433d | 2014-03-03 14:46:01 +0100 | [diff] [blame] | 2954 | spin_lock_bh(&nf_conntrack_expect_lock); |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 2955 | for (i = 0; i < nf_ct_expect_hsize; i++) { |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 2956 | hlist_for_each_entry_safe(exp, next, |
Florian Westphal | 0a93aae | 2016-05-06 00:51:49 +0200 | [diff] [blame] | 2957 | &nf_ct_expect_hash[i], |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 2958 | hnode) { |
Florian Westphal | 03d7dc5 | 2016-05-06 00:51:47 +0200 | [diff] [blame] | 2959 | |
| 2960 | if (!net_eq(nf_ct_exp_net(exp), net)) |
| 2961 | continue; |
| 2962 | |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 2963 | if (del_timer(&exp->timeout)) { |
Pablo Neira Ayuso | ebbf41d | 2010-10-19 10:19:06 +0200 | [diff] [blame] | 2964 | nf_ct_unlink_expect_report(exp, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 2965 | NETLINK_CB(skb).portid, |
Pablo Neira Ayuso | ebbf41d | 2010-10-19 10:19:06 +0200 | [diff] [blame] | 2966 | nlmsg_report(nlh)); |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 2967 | nf_ct_expect_put(exp); |
| 2968 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2969 | } |
| 2970 | } |
Jesper Dangaard Brouer | ca7433d | 2014-03-03 14:46:01 +0100 | [diff] [blame] | 2971 | spin_unlock_bh(&nf_conntrack_expect_lock); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2972 | } |
| 2973 | |
| 2974 | return 0; |
| 2975 | } |
| 2976 | static int |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 2977 | ctnetlink_change_expect(struct nf_conntrack_expect *x, |
| 2978 | const struct nlattr * const cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2979 | { |
Kelvie Wong | 9768e1a | 2012-05-02 14:39:24 +0000 | [diff] [blame] | 2980 | if (cda[CTA_EXPECT_TIMEOUT]) { |
| 2981 | if (!del_timer(&x->timeout)) |
| 2982 | return -ETIME; |
| 2983 | |
| 2984 | x->timeout.expires = jiffies + |
| 2985 | ntohl(nla_get_be32(cda[CTA_EXPECT_TIMEOUT])) * HZ; |
| 2986 | add_timer(&x->timeout); |
| 2987 | } |
| 2988 | return 0; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2989 | } |
| 2990 | |
Pablo Neira Ayuso | 076a0ca | 2012-02-05 03:41:52 +0100 | [diff] [blame] | 2991 | static const struct nla_policy exp_nat_nla_policy[CTA_EXPECT_NAT_MAX+1] = { |
| 2992 | [CTA_EXPECT_NAT_DIR] = { .type = NLA_U32 }, |
| 2993 | [CTA_EXPECT_NAT_TUPLE] = { .type = NLA_NESTED }, |
| 2994 | }; |
| 2995 | |
| 2996 | static int |
| 2997 | ctnetlink_parse_expect_nat(const struct nlattr *attr, |
| 2998 | struct nf_conntrack_expect *exp, |
| 2999 | u_int8_t u3) |
| 3000 | { |
| 3001 | #ifdef CONFIG_NF_NAT_NEEDED |
| 3002 | struct nlattr *tb[CTA_EXPECT_NAT_MAX+1]; |
| 3003 | struct nf_conntrack_tuple nat_tuple = {}; |
| 3004 | int err; |
| 3005 | |
Daniel Borkmann | 130ffbc | 2013-06-12 17:54:51 +0200 | [diff] [blame] | 3006 | err = nla_parse_nested(tb, CTA_EXPECT_NAT_MAX, attr, exp_nat_nla_policy); |
| 3007 | if (err < 0) |
| 3008 | return err; |
Pablo Neira Ayuso | 076a0ca | 2012-02-05 03:41:52 +0100 | [diff] [blame] | 3009 | |
| 3010 | if (!tb[CTA_EXPECT_NAT_DIR] || !tb[CTA_EXPECT_NAT_TUPLE]) |
| 3011 | return -EINVAL; |
| 3012 | |
| 3013 | err = ctnetlink_parse_tuple((const struct nlattr * const *)tb, |
Daniel Borkmann | deedb59 | 2015-08-14 16:03:39 +0200 | [diff] [blame] | 3014 | &nat_tuple, CTA_EXPECT_NAT_TUPLE, |
| 3015 | u3, NULL); |
Pablo Neira Ayuso | 076a0ca | 2012-02-05 03:41:52 +0100 | [diff] [blame] | 3016 | if (err < 0) |
| 3017 | return err; |
| 3018 | |
Patrick McHardy | c7232c9 | 2012-08-26 19:14:06 +0200 | [diff] [blame] | 3019 | exp->saved_addr = nat_tuple.src.u3; |
Pablo Neira Ayuso | 076a0ca | 2012-02-05 03:41:52 +0100 | [diff] [blame] | 3020 | exp->saved_proto = nat_tuple.src.u; |
| 3021 | exp->dir = ntohl(nla_get_be32(tb[CTA_EXPECT_NAT_DIR])); |
| 3022 | |
| 3023 | return 0; |
| 3024 | #else |
| 3025 | return -EOPNOTSUPP; |
| 3026 | #endif |
| 3027 | } |
| 3028 | |
Pablo Neira Ayuso | 0ef71ee | 2013-08-07 19:12:34 +0200 | [diff] [blame] | 3029 | static struct nf_conntrack_expect * |
| 3030 | ctnetlink_alloc_expect(const struct nlattr * const cda[], struct nf_conn *ct, |
| 3031 | struct nf_conntrack_helper *helper, |
| 3032 | struct nf_conntrack_tuple *tuple, |
| 3033 | struct nf_conntrack_tuple *mask) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3034 | { |
Pablo Neira Ayuso | b8c5e52 | 2012-02-05 03:21:12 +0100 | [diff] [blame] | 3035 | u_int32_t class = 0; |
Pablo Neira Ayuso | 0ef71ee | 2013-08-07 19:12:34 +0200 | [diff] [blame] | 3036 | struct nf_conntrack_expect *exp; |
| 3037 | struct nf_conn_help *help; |
| 3038 | int err; |
Pablo Neira Ayuso | 660fdb2 | 2012-02-05 02:34:16 +0100 | [diff] [blame] | 3039 | |
Pablo Neira Ayuso | b8c5e52 | 2012-02-05 03:21:12 +0100 | [diff] [blame] | 3040 | if (cda[CTA_EXPECT_CLASS] && helper) { |
| 3041 | class = ntohl(nla_get_be32(cda[CTA_EXPECT_CLASS])); |
Pablo Neira Ayuso | 0ef71ee | 2013-08-07 19:12:34 +0200 | [diff] [blame] | 3042 | if (class > helper->expect_class_max) |
| 3043 | return ERR_PTR(-EINVAL); |
Pablo Neira Ayuso | b8c5e52 | 2012-02-05 03:21:12 +0100 | [diff] [blame] | 3044 | } |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 3045 | exp = nf_ct_expect_alloc(ct); |
Pablo Neira Ayuso | 0ef71ee | 2013-08-07 19:12:34 +0200 | [diff] [blame] | 3046 | if (!exp) |
| 3047 | return ERR_PTR(-ENOMEM); |
| 3048 | |
Pablo Neira Ayuso | bc01befd | 2010-09-28 21:06:34 +0200 | [diff] [blame] | 3049 | help = nfct_help(ct); |
| 3050 | if (!help) { |
| 3051 | if (!cda[CTA_EXPECT_TIMEOUT]) { |
| 3052 | err = -EINVAL; |
Jesper Juhl | 1310b955 | 2012-12-26 11:49:40 +0000 | [diff] [blame] | 3053 | goto err_out; |
Pablo Neira Ayuso | bc01befd | 2010-09-28 21:06:34 +0200 | [diff] [blame] | 3054 | } |
| 3055 | exp->timeout.expires = |
| 3056 | jiffies + ntohl(nla_get_be32(cda[CTA_EXPECT_TIMEOUT])) * HZ; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 3057 | |
Pablo Neira Ayuso | bc01befd | 2010-09-28 21:06:34 +0200 | [diff] [blame] | 3058 | exp->flags = NF_CT_EXPECT_USERSPACE; |
| 3059 | if (cda[CTA_EXPECT_FLAGS]) { |
| 3060 | exp->flags |= |
| 3061 | ntohl(nla_get_be32(cda[CTA_EXPECT_FLAGS])); |
| 3062 | } |
| 3063 | } else { |
| 3064 | if (cda[CTA_EXPECT_FLAGS]) { |
| 3065 | exp->flags = ntohl(nla_get_be32(cda[CTA_EXPECT_FLAGS])); |
| 3066 | exp->flags &= ~NF_CT_EXPECT_USERSPACE; |
| 3067 | } else |
| 3068 | exp->flags = 0; |
| 3069 | } |
Pablo Neira Ayuso | 544d5c7 | 2012-02-05 03:44:51 +0100 | [diff] [blame] | 3070 | if (cda[CTA_EXPECT_FN]) { |
| 3071 | const char *name = nla_data(cda[CTA_EXPECT_FN]); |
| 3072 | struct nf_ct_helper_expectfn *expfn; |
| 3073 | |
| 3074 | expfn = nf_ct_helper_expectfn_find_by_name(name); |
| 3075 | if (expfn == NULL) { |
| 3076 | err = -EINVAL; |
| 3077 | goto err_out; |
| 3078 | } |
| 3079 | exp->expectfn = expfn->expectfn; |
| 3080 | } else |
| 3081 | exp->expectfn = NULL; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3082 | |
Pablo Neira Ayuso | b8c5e52 | 2012-02-05 03:21:12 +0100 | [diff] [blame] | 3083 | exp->class = class; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3084 | exp->master = ct; |
Pablo Neira Ayuso | 660fdb2 | 2012-02-05 02:34:16 +0100 | [diff] [blame] | 3085 | exp->helper = helper; |
Pablo Neira Ayuso | 0ef71ee | 2013-08-07 19:12:34 +0200 | [diff] [blame] | 3086 | exp->tuple = *tuple; |
| 3087 | exp->mask.src.u3 = mask->src.u3; |
| 3088 | exp->mask.src.u.all = mask->src.u.all; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3089 | |
Pablo Neira Ayuso | 076a0ca | 2012-02-05 03:41:52 +0100 | [diff] [blame] | 3090 | if (cda[CTA_EXPECT_NAT]) { |
| 3091 | err = ctnetlink_parse_expect_nat(cda[CTA_EXPECT_NAT], |
Pablo Neira Ayuso | 0ef71ee | 2013-08-07 19:12:34 +0200 | [diff] [blame] | 3092 | exp, nf_ct_l3num(ct)); |
Pablo Neira Ayuso | 076a0ca | 2012-02-05 03:41:52 +0100 | [diff] [blame] | 3093 | if (err < 0) |
| 3094 | goto err_out; |
| 3095 | } |
Pablo Neira Ayuso | 0ef71ee | 2013-08-07 19:12:34 +0200 | [diff] [blame] | 3096 | return exp; |
Pablo Neira Ayuso | 076a0ca | 2012-02-05 03:41:52 +0100 | [diff] [blame] | 3097 | err_out: |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 3098 | nf_ct_expect_put(exp); |
Pablo Neira Ayuso | 0ef71ee | 2013-08-07 19:12:34 +0200 | [diff] [blame] | 3099 | return ERR_PTR(err); |
| 3100 | } |
| 3101 | |
| 3102 | static int |
Daniel Borkmann | 308ac91 | 2015-08-08 21:40:01 +0200 | [diff] [blame] | 3103 | ctnetlink_create_expect(struct net *net, |
| 3104 | const struct nf_conntrack_zone *zone, |
Pablo Neira Ayuso | 0ef71ee | 2013-08-07 19:12:34 +0200 | [diff] [blame] | 3105 | const struct nlattr * const cda[], |
| 3106 | u_int8_t u3, u32 portid, int report) |
| 3107 | { |
| 3108 | struct nf_conntrack_tuple tuple, mask, master_tuple; |
| 3109 | struct nf_conntrack_tuple_hash *h = NULL; |
| 3110 | struct nf_conntrack_helper *helper = NULL; |
| 3111 | struct nf_conntrack_expect *exp; |
| 3112 | struct nf_conn *ct; |
| 3113 | int err; |
| 3114 | |
| 3115 | /* caller guarantees that those three CTA_EXPECT_* exist */ |
Daniel Borkmann | deedb59 | 2015-08-14 16:03:39 +0200 | [diff] [blame] | 3116 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, |
| 3117 | u3, NULL); |
Pablo Neira Ayuso | 0ef71ee | 2013-08-07 19:12:34 +0200 | [diff] [blame] | 3118 | if (err < 0) |
| 3119 | return err; |
Daniel Borkmann | deedb59 | 2015-08-14 16:03:39 +0200 | [diff] [blame] | 3120 | err = ctnetlink_parse_tuple(cda, &mask, CTA_EXPECT_MASK, |
| 3121 | u3, NULL); |
Pablo Neira Ayuso | 0ef71ee | 2013-08-07 19:12:34 +0200 | [diff] [blame] | 3122 | if (err < 0) |
| 3123 | return err; |
Daniel Borkmann | deedb59 | 2015-08-14 16:03:39 +0200 | [diff] [blame] | 3124 | err = ctnetlink_parse_tuple(cda, &master_tuple, CTA_EXPECT_MASTER, |
| 3125 | u3, NULL); |
Pablo Neira Ayuso | 0ef71ee | 2013-08-07 19:12:34 +0200 | [diff] [blame] | 3126 | if (err < 0) |
| 3127 | return err; |
| 3128 | |
| 3129 | /* Look for master conntrack of this expectation */ |
| 3130 | h = nf_conntrack_find_get(net, zone, &master_tuple); |
| 3131 | if (!h) |
| 3132 | return -ENOENT; |
| 3133 | ct = nf_ct_tuplehash_to_ctrack(h); |
| 3134 | |
| 3135 | if (cda[CTA_EXPECT_HELP_NAME]) { |
| 3136 | const char *helpname = nla_data(cda[CTA_EXPECT_HELP_NAME]); |
| 3137 | |
| 3138 | helper = __nf_conntrack_helper_find(helpname, u3, |
| 3139 | nf_ct_protonum(ct)); |
| 3140 | if (helper == NULL) { |
| 3141 | #ifdef CONFIG_MODULES |
| 3142 | if (request_module("nfct-helper-%s", helpname) < 0) { |
| 3143 | err = -EOPNOTSUPP; |
| 3144 | goto err_ct; |
| 3145 | } |
| 3146 | helper = __nf_conntrack_helper_find(helpname, u3, |
| 3147 | nf_ct_protonum(ct)); |
| 3148 | if (helper) { |
| 3149 | err = -EAGAIN; |
| 3150 | goto err_ct; |
| 3151 | } |
| 3152 | #endif |
| 3153 | err = -EOPNOTSUPP; |
| 3154 | goto err_ct; |
| 3155 | } |
| 3156 | } |
| 3157 | |
| 3158 | exp = ctnetlink_alloc_expect(cda, ct, helper, &tuple, &mask); |
| 3159 | if (IS_ERR(exp)) { |
| 3160 | err = PTR_ERR(exp); |
| 3161 | goto err_ct; |
| 3162 | } |
| 3163 | |
| 3164 | err = nf_ct_expect_related_report(exp, portid, report); |
Pablo Neira Ayuso | 0ef71ee | 2013-08-07 19:12:34 +0200 | [diff] [blame] | 3165 | nf_ct_expect_put(exp); |
| 3166 | err_ct: |
| 3167 | nf_ct_put(ct); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3168 | return err; |
| 3169 | } |
| 3170 | |
Pablo Neira Ayuso | 7b8002a | 2015-12-15 18:41:56 +0100 | [diff] [blame] | 3171 | static int ctnetlink_new_expect(struct net *net, struct sock *ctnl, |
| 3172 | struct sk_buff *skb, const struct nlmsghdr *nlh, |
| 3173 | const struct nlattr * const cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3174 | { |
| 3175 | struct nf_conntrack_tuple tuple; |
| 3176 | struct nf_conntrack_expect *exp; |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 3177 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3178 | u_int8_t u3 = nfmsg->nfgen_family; |
Daniel Borkmann | 308ac91 | 2015-08-08 21:40:01 +0200 | [diff] [blame] | 3179 | struct nf_conntrack_zone zone; |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 3180 | int err; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3181 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 3182 | if (!cda[CTA_EXPECT_TUPLE] |
| 3183 | || !cda[CTA_EXPECT_MASK] |
| 3184 | || !cda[CTA_EXPECT_MASTER]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3185 | return -EINVAL; |
| 3186 | |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 3187 | err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone); |
| 3188 | if (err < 0) |
| 3189 | return err; |
| 3190 | |
Daniel Borkmann | deedb59 | 2015-08-14 16:03:39 +0200 | [diff] [blame] | 3191 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, |
| 3192 | u3, NULL); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3193 | if (err < 0) |
| 3194 | return err; |
| 3195 | |
Jesper Dangaard Brouer | ca7433d | 2014-03-03 14:46:01 +0100 | [diff] [blame] | 3196 | spin_lock_bh(&nf_conntrack_expect_lock); |
Daniel Borkmann | 308ac91 | 2015-08-08 21:40:01 +0200 | [diff] [blame] | 3197 | exp = __nf_ct_expect_find(net, &zone, &tuple); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3198 | if (!exp) { |
Jesper Dangaard Brouer | ca7433d | 2014-03-03 14:46:01 +0100 | [diff] [blame] | 3199 | spin_unlock_bh(&nf_conntrack_expect_lock); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3200 | err = -ENOENT; |
Pablo Neira Ayuso | 19abb7b | 2008-11-18 11:56:20 +0100 | [diff] [blame] | 3201 | if (nlh->nlmsg_flags & NLM_F_CREATE) { |
Daniel Borkmann | 308ac91 | 2015-08-08 21:40:01 +0200 | [diff] [blame] | 3202 | err = ctnetlink_create_expect(net, &zone, cda, u3, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 3203 | NETLINK_CB(skb).portid, |
Pablo Neira Ayuso | 19abb7b | 2008-11-18 11:56:20 +0100 | [diff] [blame] | 3204 | nlmsg_report(nlh)); |
| 3205 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3206 | return err; |
| 3207 | } |
| 3208 | |
| 3209 | err = -EEXIST; |
| 3210 | if (!(nlh->nlmsg_flags & NLM_F_EXCL)) |
| 3211 | err = ctnetlink_change_expect(exp, cda); |
Jesper Dangaard Brouer | ca7433d | 2014-03-03 14:46:01 +0100 | [diff] [blame] | 3212 | spin_unlock_bh(&nf_conntrack_expect_lock); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3213 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3214 | return err; |
| 3215 | } |
| 3216 | |
Pablo Neira Ayuso | 392025f | 2012-06-26 20:27:09 +0200 | [diff] [blame] | 3217 | static int |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 3218 | 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] | 3219 | const struct ip_conntrack_stat *st) |
| 3220 | { |
| 3221 | struct nlmsghdr *nlh; |
| 3222 | struct nfgenmsg *nfmsg; |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 3223 | unsigned int flags = portid ? NLM_F_MULTI : 0, event; |
Pablo Neira Ayuso | 392025f | 2012-06-26 20:27:09 +0200 | [diff] [blame] | 3224 | |
| 3225 | event = (NFNL_SUBSYS_CTNETLINK << 8 | IPCTNL_MSG_EXP_GET_STATS_CPU); |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 3226 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags); |
Pablo Neira Ayuso | 392025f | 2012-06-26 20:27:09 +0200 | [diff] [blame] | 3227 | if (nlh == NULL) |
| 3228 | goto nlmsg_failure; |
| 3229 | |
| 3230 | nfmsg = nlmsg_data(nlh); |
| 3231 | nfmsg->nfgen_family = AF_UNSPEC; |
| 3232 | nfmsg->version = NFNETLINK_V0; |
| 3233 | nfmsg->res_id = htons(cpu); |
| 3234 | |
| 3235 | if (nla_put_be32(skb, CTA_STATS_EXP_NEW, htonl(st->expect_new)) || |
| 3236 | nla_put_be32(skb, CTA_STATS_EXP_CREATE, htonl(st->expect_create)) || |
| 3237 | nla_put_be32(skb, CTA_STATS_EXP_DELETE, htonl(st->expect_delete))) |
| 3238 | goto nla_put_failure; |
| 3239 | |
| 3240 | nlmsg_end(skb, nlh); |
| 3241 | return skb->len; |
| 3242 | |
| 3243 | nla_put_failure: |
| 3244 | nlmsg_failure: |
| 3245 | nlmsg_cancel(skb, nlh); |
| 3246 | return -1; |
| 3247 | } |
| 3248 | |
| 3249 | static int |
| 3250 | ctnetlink_exp_stat_cpu_dump(struct sk_buff *skb, struct netlink_callback *cb) |
| 3251 | { |
| 3252 | int cpu; |
| 3253 | struct net *net = sock_net(skb->sk); |
| 3254 | |
| 3255 | if (cb->args[0] == nr_cpu_ids) |
| 3256 | return 0; |
| 3257 | |
| 3258 | for (cpu = cb->args[0]; cpu < nr_cpu_ids; cpu++) { |
| 3259 | const struct ip_conntrack_stat *st; |
| 3260 | |
| 3261 | if (!cpu_possible(cpu)) |
| 3262 | continue; |
| 3263 | |
| 3264 | st = per_cpu_ptr(net->ct.stat, cpu); |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 3265 | 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] | 3266 | cb->nlh->nlmsg_seq, |
| 3267 | cpu, st) < 0) |
| 3268 | break; |
| 3269 | } |
| 3270 | cb->args[0] = cpu; |
| 3271 | |
| 3272 | return skb->len; |
| 3273 | } |
| 3274 | |
Pablo Neira Ayuso | 7b8002a | 2015-12-15 18:41:56 +0100 | [diff] [blame] | 3275 | static int ctnetlink_stat_exp_cpu(struct net *net, struct sock *ctnl, |
| 3276 | struct sk_buff *skb, |
| 3277 | const struct nlmsghdr *nlh, |
| 3278 | const struct nlattr * const cda[]) |
Pablo Neira Ayuso | 392025f | 2012-06-26 20:27:09 +0200 | [diff] [blame] | 3279 | { |
| 3280 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
| 3281 | struct netlink_dump_control c = { |
| 3282 | .dump = ctnetlink_exp_stat_cpu_dump, |
| 3283 | }; |
| 3284 | return netlink_dump_start(ctnl, skb, nlh, &c); |
| 3285 | } |
| 3286 | |
| 3287 | return 0; |
| 3288 | } |
| 3289 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3290 | #ifdef CONFIG_NF_CONNTRACK_EVENTS |
Pablo Neira Ayuso | e34d5c1 | 2009-06-03 10:32:06 +0200 | [diff] [blame] | 3291 | static struct nf_ct_event_notifier ctnl_notifier = { |
| 3292 | .fcn = ctnetlink_conntrack_event, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3293 | }; |
| 3294 | |
Pablo Neira Ayuso | e34d5c1 | 2009-06-03 10:32:06 +0200 | [diff] [blame] | 3295 | static struct nf_exp_event_notifier ctnl_notifier_exp = { |
| 3296 | .fcn = ctnetlink_expect_event, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3297 | }; |
| 3298 | #endif |
| 3299 | |
Patrick McHardy | 7c8d4cb | 2007-09-28 14:15:45 -0700 | [diff] [blame] | 3300 | static const struct nfnl_callback ctnl_cb[IPCTNL_MSG_MAX] = { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3301 | [IPCTNL_MSG_CT_NEW] = { .call = ctnetlink_new_conntrack, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 3302 | .attr_count = CTA_MAX, |
| 3303 | .policy = ct_nla_policy }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3304 | [IPCTNL_MSG_CT_GET] = { .call = ctnetlink_get_conntrack, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 3305 | .attr_count = CTA_MAX, |
| 3306 | .policy = ct_nla_policy }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3307 | [IPCTNL_MSG_CT_DELETE] = { .call = ctnetlink_del_conntrack, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 3308 | .attr_count = CTA_MAX, |
| 3309 | .policy = ct_nla_policy }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3310 | [IPCTNL_MSG_CT_GET_CTRZERO] = { .call = ctnetlink_get_conntrack, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 3311 | .attr_count = CTA_MAX, |
| 3312 | .policy = ct_nla_policy }, |
Pablo Neira Ayuso | 392025f | 2012-06-26 20:27:09 +0200 | [diff] [blame] | 3313 | [IPCTNL_MSG_CT_GET_STATS_CPU] = { .call = ctnetlink_stat_ct_cpu }, |
| 3314 | [IPCTNL_MSG_CT_GET_STATS] = { .call = ctnetlink_stat_ct }, |
Pablo Neira Ayuso | d871bef | 2012-11-27 14:49:42 +0100 | [diff] [blame] | 3315 | [IPCTNL_MSG_CT_GET_DYING] = { .call = ctnetlink_get_ct_dying }, |
| 3316 | [IPCTNL_MSG_CT_GET_UNCONFIRMED] = { .call = ctnetlink_get_ct_unconfirmed }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3317 | }; |
| 3318 | |
Patrick McHardy | 7c8d4cb | 2007-09-28 14:15:45 -0700 | [diff] [blame] | 3319 | 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] | 3320 | [IPCTNL_MSG_EXP_GET] = { .call = ctnetlink_get_expect, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 3321 | .attr_count = CTA_EXPECT_MAX, |
| 3322 | .policy = exp_nla_policy }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3323 | [IPCTNL_MSG_EXP_NEW] = { .call = ctnetlink_new_expect, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 3324 | .attr_count = CTA_EXPECT_MAX, |
| 3325 | .policy = exp_nla_policy }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3326 | [IPCTNL_MSG_EXP_DELETE] = { .call = ctnetlink_del_expect, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 3327 | .attr_count = CTA_EXPECT_MAX, |
| 3328 | .policy = exp_nla_policy }, |
Pablo Neira Ayuso | 392025f | 2012-06-26 20:27:09 +0200 | [diff] [blame] | 3329 | [IPCTNL_MSG_EXP_GET_STATS_CPU] = { .call = ctnetlink_stat_exp_cpu }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3330 | }; |
| 3331 | |
Patrick McHardy | 7c8d4cb | 2007-09-28 14:15:45 -0700 | [diff] [blame] | 3332 | static const struct nfnetlink_subsystem ctnl_subsys = { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3333 | .name = "conntrack", |
| 3334 | .subsys_id = NFNL_SUBSYS_CTNETLINK, |
| 3335 | .cb_count = IPCTNL_MSG_MAX, |
| 3336 | .cb = ctnl_cb, |
| 3337 | }; |
| 3338 | |
Patrick McHardy | 7c8d4cb | 2007-09-28 14:15:45 -0700 | [diff] [blame] | 3339 | static const struct nfnetlink_subsystem ctnl_exp_subsys = { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3340 | .name = "conntrack_expect", |
| 3341 | .subsys_id = NFNL_SUBSYS_CTNETLINK_EXP, |
| 3342 | .cb_count = IPCTNL_MSG_EXP_MAX, |
| 3343 | .cb = ctnl_exp_cb, |
| 3344 | }; |
| 3345 | |
Patrick McHardy | d2483dd | 2006-12-02 22:06:05 -0800 | [diff] [blame] | 3346 | MODULE_ALIAS("ip_conntrack_netlink"); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3347 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK); |
Pablo Neira Ayuso | 34f9a2e | 2006-02-04 02:11:41 -0800 | [diff] [blame] | 3348 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK_EXP); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3349 | |
Pablo Neira Ayuso | 70e9942 | 2011-11-22 00:16:51 +0100 | [diff] [blame] | 3350 | static int __net_init ctnetlink_net_init(struct net *net) |
| 3351 | { |
| 3352 | #ifdef CONFIG_NF_CONNTRACK_EVENTS |
| 3353 | int ret; |
| 3354 | |
| 3355 | ret = nf_conntrack_register_notifier(net, &ctnl_notifier); |
| 3356 | if (ret < 0) { |
| 3357 | pr_err("ctnetlink_init: cannot register notifier.\n"); |
| 3358 | goto err_out; |
| 3359 | } |
| 3360 | |
| 3361 | ret = nf_ct_expect_register_notifier(net, &ctnl_notifier_exp); |
| 3362 | if (ret < 0) { |
| 3363 | pr_err("ctnetlink_init: cannot expect register notifier.\n"); |
| 3364 | goto err_unreg_notifier; |
| 3365 | } |
| 3366 | #endif |
| 3367 | return 0; |
| 3368 | |
| 3369 | #ifdef CONFIG_NF_CONNTRACK_EVENTS |
| 3370 | err_unreg_notifier: |
| 3371 | nf_conntrack_unregister_notifier(net, &ctnl_notifier); |
| 3372 | err_out: |
| 3373 | return ret; |
| 3374 | #endif |
| 3375 | } |
| 3376 | |
| 3377 | static void ctnetlink_net_exit(struct net *net) |
| 3378 | { |
| 3379 | #ifdef CONFIG_NF_CONNTRACK_EVENTS |
| 3380 | nf_ct_expect_unregister_notifier(net, &ctnl_notifier_exp); |
| 3381 | nf_conntrack_unregister_notifier(net, &ctnl_notifier); |
| 3382 | #endif |
| 3383 | } |
| 3384 | |
| 3385 | static void __net_exit ctnetlink_net_exit_batch(struct list_head *net_exit_list) |
| 3386 | { |
| 3387 | struct net *net; |
| 3388 | |
| 3389 | list_for_each_entry(net, net_exit_list, exit_list) |
| 3390 | ctnetlink_net_exit(net); |
| 3391 | } |
| 3392 | |
| 3393 | static struct pernet_operations ctnetlink_net_ops = { |
| 3394 | .init = ctnetlink_net_init, |
| 3395 | .exit_batch = ctnetlink_net_exit_batch, |
| 3396 | }; |
| 3397 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3398 | static int __init ctnetlink_init(void) |
| 3399 | { |
| 3400 | int ret; |
| 3401 | |
Stephen Hemminger | 654d0fb | 2010-05-13 15:02:08 +0200 | [diff] [blame] | 3402 | pr_info("ctnetlink v%s: registering with nfnetlink.\n", version); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3403 | ret = nfnetlink_subsys_register(&ctnl_subsys); |
| 3404 | if (ret < 0) { |
Stephen Hemminger | 654d0fb | 2010-05-13 15:02:08 +0200 | [diff] [blame] | 3405 | pr_err("ctnetlink_init: cannot register with nfnetlink.\n"); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3406 | goto err_out; |
| 3407 | } |
| 3408 | |
| 3409 | ret = nfnetlink_subsys_register(&ctnl_exp_subsys); |
| 3410 | if (ret < 0) { |
Stephen Hemminger | 654d0fb | 2010-05-13 15:02:08 +0200 | [diff] [blame] | 3411 | pr_err("ctnetlink_init: cannot register exp with nfnetlink.\n"); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3412 | goto err_unreg_subsys; |
| 3413 | } |
| 3414 | |
Julia Lawall | ef6acf6 | 2012-08-29 06:49:16 +0000 | [diff] [blame] | 3415 | ret = register_pernet_subsys(&ctnetlink_net_ops); |
| 3416 | if (ret < 0) { |
Pablo Neira Ayuso | 70e9942 | 2011-11-22 00:16:51 +0100 | [diff] [blame] | 3417 | pr_err("ctnetlink_init: cannot register pernet operations\n"); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3418 | goto err_unreg_exp_subsys; |
| 3419 | } |
Ken-ichirou MATSUZAWA | 83f3e94 | 2015-10-05 11:48:47 +0900 | [diff] [blame] | 3420 | #ifdef CONFIG_NETFILTER_NETLINK_GLUE_CT |
Pablo Neira Ayuso | 9cb0176 | 2012-06-07 12:13:39 +0200 | [diff] [blame] | 3421 | /* setup interaction between nf_queue and nf_conntrack_netlink. */ |
Ken-ichirou MATSUZAWA | a4b4766 | 2015-10-05 11:47:13 +0900 | [diff] [blame] | 3422 | RCU_INIT_POINTER(nfnl_ct_hook, &ctnetlink_glue_hook); |
Pablo Neira Ayuso | 9cb0176 | 2012-06-07 12:13:39 +0200 | [diff] [blame] | 3423 | #endif |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3424 | return 0; |
| 3425 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3426 | err_unreg_exp_subsys: |
| 3427 | nfnetlink_subsys_unregister(&ctnl_exp_subsys); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3428 | err_unreg_subsys: |
| 3429 | nfnetlink_subsys_unregister(&ctnl_subsys); |
| 3430 | err_out: |
| 3431 | return ret; |
| 3432 | } |
| 3433 | |
| 3434 | static void __exit ctnetlink_exit(void) |
| 3435 | { |
Stephen Hemminger | 654d0fb | 2010-05-13 15:02:08 +0200 | [diff] [blame] | 3436 | pr_info("ctnetlink: unregistering from nfnetlink.\n"); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3437 | |
Pablo Neira Ayuso | 70e9942 | 2011-11-22 00:16:51 +0100 | [diff] [blame] | 3438 | unregister_pernet_subsys(&ctnetlink_net_ops); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3439 | nfnetlink_subsys_unregister(&ctnl_exp_subsys); |
| 3440 | nfnetlink_subsys_unregister(&ctnl_subsys); |
Ken-ichirou MATSUZAWA | 83f3e94 | 2015-10-05 11:48:47 +0900 | [diff] [blame] | 3441 | #ifdef CONFIG_NETFILTER_NETLINK_GLUE_CT |
Ken-ichirou MATSUZAWA | a4b4766 | 2015-10-05 11:47:13 +0900 | [diff] [blame] | 3442 | RCU_INIT_POINTER(nfnl_ct_hook, NULL); |
Pablo Neira Ayuso | 9cb0176 | 2012-06-07 12:13:39 +0200 | [diff] [blame] | 3443 | #endif |
Liping Zhang | 146561a | 2017-03-25 08:53:12 +0800 | [diff] [blame] | 3444 | synchronize_rcu(); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 3445 | } |
| 3446 | |
| 3447 | module_init(ctnetlink_init); |
| 3448 | module_exit(ctnetlink_exit); |