Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1 | /* Connection tracking via netlink socket. Allows for user space |
| 2 | * protocol helpers and general trouble making from userspace. |
| 3 | * |
| 4 | * (C) 2001 by Jay Schulist <jschlst@samba.org> |
Harald Welte | dc808fe | 2006-03-20 17:56:32 -0800 | [diff] [blame] | 5 | * (C) 2002-2006 by Harald Welte <laforge@gnumonks.org> |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 6 | * (C) 2003 by Patrick Mchardy <kaber@trash.net> |
Pablo Neira Ayuso | 0adf9d6 | 2008-06-09 15:56:20 -0700 | [diff] [blame] | 7 | * (C) 2005-2008 by Pablo Neira Ayuso <pablo@netfilter.org> |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 8 | * |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 9 | * Initial connection tracking via netlink development funded and |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 10 | * generally made possible by Network Robots, Inc. (www.networkrobots.com) |
| 11 | * |
| 12 | * Further development of this code funded by Astaro AG (http://www.astaro.com) |
| 13 | * |
| 14 | * This software may be used and distributed according to the terms |
| 15 | * of the GNU General Public License, incorporated herein by reference. |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 16 | */ |
| 17 | |
| 18 | #include <linux/init.h> |
| 19 | #include <linux/module.h> |
| 20 | #include <linux/kernel.h> |
Ingo Molnar | 711bbdd | 2008-05-17 08:26:25 +0200 | [diff] [blame] | 21 | #include <linux/rculist.h> |
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> |
| 25 | #include <linux/skbuff.h> |
| 26 | #include <linux/errno.h> |
| 27 | #include <linux/netlink.h> |
| 28 | #include <linux/spinlock.h> |
Yasuyuki Kozakai | 40a839f | 2006-06-27 03:00:35 -0700 | [diff] [blame] | 29 | #include <linux/interrupt.h> |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 30 | |
| 31 | #include <linux/netfilter.h> |
Arnaldo Carvalho de Melo | dc5fc57 | 2007-03-25 23:06:12 -0700 | [diff] [blame] | 32 | #include <net/netlink.h> |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 33 | #include <net/sock.h> |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 34 | #include <net/netfilter/nf_conntrack.h> |
| 35 | #include <net/netfilter/nf_conntrack_core.h> |
Martin Josefsson | 77ab9cf | 2006-11-29 02:34:58 +0100 | [diff] [blame] | 36 | #include <net/netfilter/nf_conntrack_expect.h> |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 37 | #include <net/netfilter/nf_conntrack_helper.h> |
| 38 | #include <net/netfilter/nf_conntrack_l3proto.h> |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 39 | #include <net/netfilter/nf_conntrack_l4proto.h> |
Jozsef Kadlecsik | 5b1158e | 2006-12-02 22:07:13 -0800 | [diff] [blame] | 40 | #include <net/netfilter/nf_conntrack_tuple.h> |
Krzysztof Piotr Oledzki | 5840157 | 2008-07-21 10:01:34 -0700 | [diff] [blame] | 41 | #include <net/netfilter/nf_conntrack_acct.h> |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 42 | #include <net/netfilter/nf_conntrack_zones.h> |
Jozsef Kadlecsik | 5b1158e | 2006-12-02 22:07:13 -0800 | [diff] [blame] | 43 | #ifdef CONFIG_NF_NAT_NEEDED |
| 44 | #include <net/netfilter/nf_nat_core.h> |
| 45 | #include <net/netfilter/nf_nat_protocol.h> |
| 46 | #endif |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 47 | |
| 48 | #include <linux/netfilter/nfnetlink.h> |
| 49 | #include <linux/netfilter/nfnetlink_conntrack.h> |
| 50 | |
| 51 | MODULE_LICENSE("GPL"); |
| 52 | |
Harald Welte | dc808fe | 2006-03-20 17:56:32 -0800 | [diff] [blame] | 53 | static char __initdata version[] = "0.93"; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 54 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 55 | static inline int |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 56 | ctnetlink_dump_tuples_proto(struct sk_buff *skb, |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 57 | const struct nf_conntrack_tuple *tuple, |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 58 | struct nf_conntrack_l4proto *l4proto) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 59 | { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 60 | int ret = 0; |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 61 | struct nlattr *nest_parms; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 62 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 63 | nest_parms = nla_nest_start(skb, CTA_TUPLE_PROTO | NLA_F_NESTED); |
| 64 | if (!nest_parms) |
| 65 | goto nla_put_failure; |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 66 | NLA_PUT_U8(skb, CTA_PROTO_NUM, tuple->dst.protonum); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 67 | |
Patrick McHardy | fdf7083 | 2007-09-28 14:37:41 -0700 | [diff] [blame] | 68 | if (likely(l4proto->tuple_to_nlattr)) |
| 69 | ret = l4proto->tuple_to_nlattr(skb, tuple); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 70 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 71 | nla_nest_end(skb, nest_parms); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 72 | |
| 73 | return ret; |
| 74 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 75 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 76 | return -1; |
| 77 | } |
| 78 | |
| 79 | static inline int |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 80 | ctnetlink_dump_tuples_ip(struct sk_buff *skb, |
| 81 | const struct nf_conntrack_tuple *tuple, |
| 82 | struct nf_conntrack_l3proto *l3proto) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 83 | { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 84 | int ret = 0; |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 85 | struct nlattr *nest_parms; |
| 86 | |
| 87 | nest_parms = nla_nest_start(skb, CTA_TUPLE_IP | NLA_F_NESTED); |
| 88 | if (!nest_parms) |
| 89 | goto nla_put_failure; |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 90 | |
Patrick McHardy | fdf7083 | 2007-09-28 14:37:41 -0700 | [diff] [blame] | 91 | if (likely(l3proto->tuple_to_nlattr)) |
| 92 | ret = l3proto->tuple_to_nlattr(skb, tuple); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 93 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 94 | nla_nest_end(skb, nest_parms); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 95 | |
| 96 | return ret; |
| 97 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 98 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 99 | return -1; |
| 100 | } |
| 101 | |
Ilpo Järvinen | bb5cf80 | 2008-01-05 23:11:31 -0800 | [diff] [blame] | 102 | static int |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 103 | ctnetlink_dump_tuples(struct sk_buff *skb, |
| 104 | const struct nf_conntrack_tuple *tuple) |
| 105 | { |
| 106 | int ret; |
| 107 | struct nf_conntrack_l3proto *l3proto; |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 108 | struct nf_conntrack_l4proto *l4proto; |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 109 | |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 110 | l3proto = __nf_ct_l3proto_find(tuple->src.l3num); |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 111 | ret = ctnetlink_dump_tuples_ip(skb, tuple, l3proto); |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 112 | |
| 113 | if (unlikely(ret < 0)) |
| 114 | return ret; |
| 115 | |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 116 | l4proto = __nf_ct_l4proto_find(tuple->src.l3num, tuple->dst.protonum); |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 117 | ret = ctnetlink_dump_tuples_proto(skb, tuple, l4proto); |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 118 | |
| 119 | return ret; |
| 120 | } |
| 121 | |
| 122 | static inline int |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 123 | ctnetlink_dump_status(struct sk_buff *skb, const struct nf_conn *ct) |
| 124 | { |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 125 | NLA_PUT_BE32(skb, CTA_STATUS, htonl(ct->status)); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 126 | return 0; |
| 127 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 128 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 129 | return -1; |
| 130 | } |
| 131 | |
| 132 | static inline int |
| 133 | ctnetlink_dump_timeout(struct sk_buff *skb, const struct nf_conn *ct) |
| 134 | { |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 135 | long timeout = (ct->timeout.expires - jiffies) / HZ; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 136 | |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 137 | if (timeout < 0) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 138 | timeout = 0; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 139 | |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 140 | NLA_PUT_BE32(skb, CTA_TIMEOUT, htonl(timeout)); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 141 | return 0; |
| 142 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 143 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 144 | return -1; |
| 145 | } |
| 146 | |
| 147 | static inline int |
Patrick McHardy | 440f0d5 | 2009-06-10 14:32:47 +0200 | [diff] [blame] | 148 | ctnetlink_dump_protoinfo(struct sk_buff *skb, struct nf_conn *ct) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 149 | { |
Patrick McHardy | 5e8fbe2 | 2008-04-14 11:15:52 +0200 | [diff] [blame] | 150 | struct nf_conntrack_l4proto *l4proto; |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 151 | struct nlattr *nest_proto; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 152 | int ret; |
| 153 | |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 154 | l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct)); |
| 155 | if (!l4proto->to_nlattr) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 156 | return 0; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 157 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 158 | nest_proto = nla_nest_start(skb, CTA_PROTOINFO | NLA_F_NESTED); |
| 159 | if (!nest_proto) |
| 160 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 161 | |
Patrick McHardy | fdf7083 | 2007-09-28 14:37:41 -0700 | [diff] [blame] | 162 | ret = l4proto->to_nlattr(skb, nest_proto, ct); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 163 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 164 | nla_nest_end(skb, nest_proto); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 165 | |
| 166 | return ret; |
| 167 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 168 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 169 | return -1; |
| 170 | } |
| 171 | |
| 172 | static inline int |
| 173 | ctnetlink_dump_helpinfo(struct sk_buff *skb, const struct nf_conn *ct) |
| 174 | { |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 175 | struct nlattr *nest_helper; |
Harald Welte | dc808fe | 2006-03-20 17:56:32 -0800 | [diff] [blame] | 176 | const struct nf_conn_help *help = nfct_help(ct); |
Patrick McHarrdy | 3c158f7 | 2007-06-05 12:55:27 -0700 | [diff] [blame] | 177 | struct nf_conntrack_helper *helper; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 178 | |
Patrick McHarrdy | 3c158f7 | 2007-06-05 12:55:27 -0700 | [diff] [blame] | 179 | if (!help) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 180 | return 0; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 181 | |
Patrick McHarrdy | 3c158f7 | 2007-06-05 12:55:27 -0700 | [diff] [blame] | 182 | helper = rcu_dereference(help->helper); |
| 183 | if (!helper) |
| 184 | goto out; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 185 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 186 | nest_helper = nla_nest_start(skb, CTA_HELP | NLA_F_NESTED); |
| 187 | if (!nest_helper) |
| 188 | goto nla_put_failure; |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 189 | NLA_PUT_STRING(skb, CTA_HELP_NAME, helper->name); |
Patrick McHarrdy | 3c158f7 | 2007-06-05 12:55:27 -0700 | [diff] [blame] | 190 | |
Patrick McHardy | fdf7083 | 2007-09-28 14:37:41 -0700 | [diff] [blame] | 191 | if (helper->to_nlattr) |
| 192 | helper->to_nlattr(skb, ct); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 193 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 194 | nla_nest_end(skb, nest_helper); |
Patrick McHarrdy | 3c158f7 | 2007-06-05 12:55:27 -0700 | [diff] [blame] | 195 | out: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 196 | return 0; |
| 197 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 198 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 199 | return -1; |
| 200 | } |
| 201 | |
Ilpo Järvinen | bb5cf80 | 2008-01-05 23:11:31 -0800 | [diff] [blame] | 202 | static int |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 203 | ctnetlink_dump_counters(struct sk_buff *skb, const struct nf_conn *ct, |
| 204 | enum ip_conntrack_dir dir) |
| 205 | { |
| 206 | enum ctattr_type type = dir ? CTA_COUNTERS_REPLY: CTA_COUNTERS_ORIG; |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 207 | struct nlattr *nest_count; |
Krzysztof Piotr Oledzki | 5840157 | 2008-07-21 10:01:34 -0700 | [diff] [blame] | 208 | const struct nf_conn_counter *acct; |
| 209 | |
| 210 | acct = nf_conn_acct_find(ct); |
| 211 | if (!acct) |
| 212 | return 0; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 213 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 214 | nest_count = nla_nest_start(skb, type | NLA_F_NESTED); |
| 215 | if (!nest_count) |
| 216 | goto nla_put_failure; |
| 217 | |
Krzysztof Piotr Oledzki | 5840157 | 2008-07-21 10:01:34 -0700 | [diff] [blame] | 218 | NLA_PUT_BE64(skb, CTA_COUNTERS_PACKETS, |
| 219 | cpu_to_be64(acct[dir].packets)); |
| 220 | NLA_PUT_BE64(skb, CTA_COUNTERS_BYTES, |
| 221 | cpu_to_be64(acct[dir].bytes)); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 222 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 223 | nla_nest_end(skb, nest_count); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 224 | |
| 225 | return 0; |
| 226 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 227 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 228 | return -1; |
| 229 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 230 | |
| 231 | #ifdef CONFIG_NF_CONNTRACK_MARK |
| 232 | static inline int |
| 233 | ctnetlink_dump_mark(struct sk_buff *skb, const struct nf_conn *ct) |
| 234 | { |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 235 | NLA_PUT_BE32(skb, CTA_MARK, htonl(ct->mark)); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 236 | return 0; |
| 237 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 238 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 239 | return -1; |
| 240 | } |
| 241 | #else |
| 242 | #define ctnetlink_dump_mark(a, b) (0) |
| 243 | #endif |
| 244 | |
Pablo Neira Ayuso | 37fccd8 | 2007-12-17 22:28:41 -0800 | [diff] [blame] | 245 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
| 246 | static inline int |
| 247 | ctnetlink_dump_secmark(struct sk_buff *skb, const struct nf_conn *ct) |
| 248 | { |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 249 | NLA_PUT_BE32(skb, CTA_SECMARK, htonl(ct->secmark)); |
Pablo Neira Ayuso | 37fccd8 | 2007-12-17 22:28:41 -0800 | [diff] [blame] | 250 | return 0; |
| 251 | |
| 252 | nla_put_failure: |
| 253 | return -1; |
| 254 | } |
| 255 | #else |
| 256 | #define ctnetlink_dump_secmark(a, b) (0) |
| 257 | #endif |
| 258 | |
Pablo Neira Ayuso | 0f417ce | 2007-12-17 22:28:19 -0800 | [diff] [blame] | 259 | #define master_tuple(ct) &(ct->master->tuplehash[IP_CT_DIR_ORIGINAL].tuple) |
| 260 | |
| 261 | static inline int |
| 262 | ctnetlink_dump_master(struct sk_buff *skb, const struct nf_conn *ct) |
| 263 | { |
| 264 | struct nlattr *nest_parms; |
| 265 | |
| 266 | if (!(ct->status & IPS_EXPECTED)) |
| 267 | return 0; |
| 268 | |
| 269 | nest_parms = nla_nest_start(skb, CTA_TUPLE_MASTER | NLA_F_NESTED); |
| 270 | if (!nest_parms) |
| 271 | goto nla_put_failure; |
| 272 | if (ctnetlink_dump_tuples(skb, master_tuple(ct)) < 0) |
| 273 | goto nla_put_failure; |
| 274 | nla_nest_end(skb, nest_parms); |
| 275 | |
| 276 | return 0; |
| 277 | |
| 278 | nla_put_failure: |
| 279 | return -1; |
| 280 | } |
| 281 | |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 282 | #ifdef CONFIG_NF_NAT_NEEDED |
Ilpo Järvinen | bb5cf80 | 2008-01-05 23:11:31 -0800 | [diff] [blame] | 283 | static int |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 284 | dump_nat_seq_adj(struct sk_buff *skb, const struct nf_nat_seq *natseq, int type) |
| 285 | { |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 286 | struct nlattr *nest_parms; |
| 287 | |
| 288 | nest_parms = nla_nest_start(skb, type | NLA_F_NESTED); |
| 289 | if (!nest_parms) |
| 290 | goto nla_put_failure; |
| 291 | |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 292 | NLA_PUT_BE32(skb, CTA_NAT_SEQ_CORRECTION_POS, |
| 293 | htonl(natseq->correction_pos)); |
| 294 | NLA_PUT_BE32(skb, CTA_NAT_SEQ_OFFSET_BEFORE, |
| 295 | htonl(natseq->offset_before)); |
| 296 | NLA_PUT_BE32(skb, CTA_NAT_SEQ_OFFSET_AFTER, |
| 297 | htonl(natseq->offset_after)); |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 298 | |
| 299 | nla_nest_end(skb, nest_parms); |
| 300 | |
| 301 | return 0; |
| 302 | |
| 303 | nla_put_failure: |
| 304 | return -1; |
| 305 | } |
| 306 | |
| 307 | static inline int |
| 308 | ctnetlink_dump_nat_seq_adj(struct sk_buff *skb, const struct nf_conn *ct) |
| 309 | { |
| 310 | struct nf_nat_seq *natseq; |
| 311 | struct nf_conn_nat *nat = nfct_nat(ct); |
| 312 | |
| 313 | if (!(ct->status & IPS_SEQ_ADJUST) || !nat) |
| 314 | return 0; |
| 315 | |
| 316 | natseq = &nat->seq[IP_CT_DIR_ORIGINAL]; |
| 317 | if (dump_nat_seq_adj(skb, natseq, CTA_NAT_SEQ_ADJ_ORIG) == -1) |
| 318 | return -1; |
| 319 | |
| 320 | natseq = &nat->seq[IP_CT_DIR_REPLY]; |
| 321 | if (dump_nat_seq_adj(skb, natseq, CTA_NAT_SEQ_ADJ_REPLY) == -1) |
| 322 | return -1; |
| 323 | |
| 324 | return 0; |
| 325 | } |
| 326 | #else |
| 327 | #define ctnetlink_dump_nat_seq_adj(a, b) (0) |
| 328 | #endif |
| 329 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 330 | static inline int |
| 331 | ctnetlink_dump_id(struct sk_buff *skb, const struct nf_conn *ct) |
| 332 | { |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 333 | NLA_PUT_BE32(skb, CTA_ID, htonl((unsigned long)ct)); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 334 | return 0; |
| 335 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 336 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 337 | return -1; |
| 338 | } |
| 339 | |
| 340 | static inline int |
| 341 | ctnetlink_dump_use(struct sk_buff *skb, const struct nf_conn *ct) |
| 342 | { |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 343 | NLA_PUT_BE32(skb, CTA_USE, htonl(atomic_read(&ct->ct_general.use))); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 344 | return 0; |
| 345 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 346 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 347 | return -1; |
| 348 | } |
| 349 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 350 | static int |
| 351 | ctnetlink_fill_info(struct sk_buff *skb, u32 pid, u32 seq, |
Patrick McHardy | 440f0d5 | 2009-06-10 14:32:47 +0200 | [diff] [blame] | 352 | int event, struct nf_conn *ct) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 353 | { |
| 354 | struct nlmsghdr *nlh; |
| 355 | struct nfgenmsg *nfmsg; |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 356 | struct nlattr *nest_parms; |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 357 | unsigned int flags = pid ? NLM_F_MULTI : 0; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 358 | |
| 359 | event |= NFNL_SUBSYS_CTNETLINK << 8; |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 360 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*nfmsg), flags); |
| 361 | if (nlh == NULL) |
| 362 | goto nlmsg_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 363 | |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 364 | nfmsg = nlmsg_data(nlh); |
Patrick McHardy | 5e8fbe2 | 2008-04-14 11:15:52 +0200 | [diff] [blame] | 365 | nfmsg->nfgen_family = nf_ct_l3num(ct); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 366 | nfmsg->version = NFNETLINK_V0; |
| 367 | nfmsg->res_id = 0; |
| 368 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 369 | nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED); |
| 370 | if (!nest_parms) |
| 371 | goto nla_put_failure; |
Pablo Neira Ayuso | f2f3e38 | 2009-06-02 20:03:35 +0200 | [diff] [blame] | 372 | 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] | 373 | goto nla_put_failure; |
| 374 | nla_nest_end(skb, nest_parms); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 375 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 376 | nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED); |
| 377 | if (!nest_parms) |
| 378 | goto nla_put_failure; |
Pablo Neira Ayuso | f2f3e38 | 2009-06-02 20:03:35 +0200 | [diff] [blame] | 379 | 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] | 380 | goto nla_put_failure; |
| 381 | nla_nest_end(skb, nest_parms); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 382 | |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 383 | if (nf_ct_zone(ct)) |
| 384 | NLA_PUT_BE16(skb, CTA_ZONE, htons(nf_ct_zone(ct))); |
| 385 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 386 | if (ctnetlink_dump_status(skb, ct) < 0 || |
| 387 | ctnetlink_dump_timeout(skb, ct) < 0 || |
| 388 | ctnetlink_dump_counters(skb, ct, IP_CT_DIR_ORIGINAL) < 0 || |
| 389 | ctnetlink_dump_counters(skb, ct, IP_CT_DIR_REPLY) < 0 || |
| 390 | ctnetlink_dump_protoinfo(skb, ct) < 0 || |
| 391 | ctnetlink_dump_helpinfo(skb, ct) < 0 || |
| 392 | ctnetlink_dump_mark(skb, ct) < 0 || |
Pablo Neira Ayuso | 37fccd8 | 2007-12-17 22:28:41 -0800 | [diff] [blame] | 393 | ctnetlink_dump_secmark(skb, ct) < 0 || |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 394 | ctnetlink_dump_id(skb, ct) < 0 || |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 395 | ctnetlink_dump_use(skb, ct) < 0 || |
Pablo Neira Ayuso | 0f417ce | 2007-12-17 22:28:19 -0800 | [diff] [blame] | 396 | ctnetlink_dump_master(skb, ct) < 0 || |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 397 | ctnetlink_dump_nat_seq_adj(skb, ct) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 398 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 399 | |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 400 | nlmsg_end(skb, nlh); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 401 | return skb->len; |
| 402 | |
| 403 | nlmsg_failure: |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 404 | nla_put_failure: |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 405 | nlmsg_cancel(skb, nlh); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 406 | return -1; |
| 407 | } |
| 408 | |
| 409 | #ifdef CONFIG_NF_CONNTRACK_EVENTS |
Pablo Neira Ayuso | 03b64f5 | 2009-06-02 20:08:27 +0200 | [diff] [blame] | 410 | static inline size_t |
| 411 | ctnetlink_proto_size(const struct nf_conn *ct) |
Holger Eitzenberger | 2732c4e | 2009-03-25 21:50:59 +0100 | [diff] [blame] | 412 | { |
| 413 | struct nf_conntrack_l3proto *l3proto; |
| 414 | struct nf_conntrack_l4proto *l4proto; |
Pablo Neira Ayuso | 03b64f5 | 2009-06-02 20:08:27 +0200 | [diff] [blame] | 415 | size_t len = 0; |
Holger Eitzenberger | 2732c4e | 2009-03-25 21:50:59 +0100 | [diff] [blame] | 416 | |
| 417 | rcu_read_lock(); |
Pablo Neira Ayuso | 03b64f5 | 2009-06-02 20:08:27 +0200 | [diff] [blame] | 418 | l3proto = __nf_ct_l3proto_find(nf_ct_l3num(ct)); |
Holger Eitzenberger | 2732c4e | 2009-03-25 21:50:59 +0100 | [diff] [blame] | 419 | len += l3proto->nla_size; |
| 420 | |
Pablo Neira Ayuso | 03b64f5 | 2009-06-02 20:08:27 +0200 | [diff] [blame] | 421 | 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] | 422 | len += l4proto->nla_size; |
| 423 | rcu_read_unlock(); |
| 424 | |
Pablo Neira Ayuso | 03b64f5 | 2009-06-02 20:08:27 +0200 | [diff] [blame] | 425 | return len; |
| 426 | } |
| 427 | |
| 428 | static inline size_t |
Jiri Pirko | d26e6a0 | 2010-04-01 12:39:19 +0200 | [diff] [blame^] | 429 | ctnetlink_counters_size(const struct nf_conn *ct) |
| 430 | { |
| 431 | if (!nf_ct_ext_exist(ct, NF_CT_EXT_ACCT)) |
| 432 | return 0; |
| 433 | return 2 * nla_total_size(0) /* CTA_COUNTERS_ORIG|REPL */ |
| 434 | + 2 * nla_total_size(sizeof(uint64_t)) /* CTA_COUNTERS_PACKETS */ |
| 435 | + 2 * nla_total_size(sizeof(uint64_t)) /* CTA_COUNTERS_BYTES */ |
| 436 | ; |
| 437 | } |
| 438 | |
| 439 | static inline size_t |
Pablo Neira Ayuso | 03b64f5 | 2009-06-02 20:08:27 +0200 | [diff] [blame] | 440 | ctnetlink_nlmsg_size(const struct nf_conn *ct) |
| 441 | { |
| 442 | return NLMSG_ALIGN(sizeof(struct nfgenmsg)) |
| 443 | + 3 * nla_total_size(0) /* CTA_TUPLE_ORIG|REPL|MASTER */ |
| 444 | + 3 * nla_total_size(0) /* CTA_TUPLE_IP */ |
| 445 | + 3 * nla_total_size(0) /* CTA_TUPLE_PROTO */ |
| 446 | + 3 * nla_total_size(sizeof(u_int8_t)) /* CTA_PROTO_NUM */ |
| 447 | + nla_total_size(sizeof(u_int32_t)) /* CTA_ID */ |
| 448 | + nla_total_size(sizeof(u_int32_t)) /* CTA_STATUS */ |
Jiri Pirko | d26e6a0 | 2010-04-01 12:39:19 +0200 | [diff] [blame^] | 449 | + ctnetlink_counters_size(ct) |
Pablo Neira Ayuso | 03b64f5 | 2009-06-02 20:08:27 +0200 | [diff] [blame] | 450 | + nla_total_size(sizeof(u_int32_t)) /* CTA_TIMEOUT */ |
| 451 | + nla_total_size(0) /* CTA_PROTOINFO */ |
| 452 | + nla_total_size(0) /* CTA_HELP */ |
| 453 | + nla_total_size(NF_CT_HELPER_NAME_LEN) /* CTA_HELP_NAME */ |
| 454 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
| 455 | + nla_total_size(sizeof(u_int32_t)) /* CTA_SECMARK */ |
| 456 | #endif |
| 457 | #ifdef CONFIG_NF_NAT_NEEDED |
| 458 | + 2 * nla_total_size(0) /* CTA_NAT_SEQ_ADJ_ORIG|REPL */ |
| 459 | + 6 * nla_total_size(sizeof(u_int32_t)) /* CTA_NAT_SEQ_OFFSET */ |
| 460 | #endif |
| 461 | #ifdef CONFIG_NF_CONNTRACK_MARK |
| 462 | + nla_total_size(sizeof(u_int32_t)) /* CTA_MARK */ |
| 463 | #endif |
| 464 | + ctnetlink_proto_size(ct) |
| 465 | ; |
Holger Eitzenberger | 2732c4e | 2009-03-25 21:50:59 +0100 | [diff] [blame] | 466 | } |
| 467 | |
Pablo Neira Ayuso | e34d5c1 | 2009-06-03 10:32:06 +0200 | [diff] [blame] | 468 | static int |
| 469 | ctnetlink_conntrack_event(unsigned int events, struct nf_ct_event *item) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 470 | { |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 471 | struct net *net; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 472 | struct nlmsghdr *nlh; |
| 473 | struct nfgenmsg *nfmsg; |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 474 | struct nlattr *nest_parms; |
Pablo Neira Ayuso | 19abb7b | 2008-11-18 11:56:20 +0100 | [diff] [blame] | 475 | struct nf_conn *ct = item->ct; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 476 | struct sk_buff *skb; |
| 477 | unsigned int type; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 478 | unsigned int flags = 0, group; |
Pablo Neira Ayuso | dd7669a | 2009-06-13 12:30:52 +0200 | [diff] [blame] | 479 | int err; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 480 | |
| 481 | /* ignore our fake conntrack entry */ |
| 482 | if (ct == &nf_conntrack_untracked) |
Pablo Neira Ayuso | e34d5c1 | 2009-06-03 10:32:06 +0200 | [diff] [blame] | 483 | return 0; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 484 | |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 485 | if (events & (1 << IPCT_DESTROY)) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 486 | type = IPCTNL_MSG_CT_DELETE; |
| 487 | group = NFNLGRP_CONNTRACK_DESTROY; |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 488 | } else if (events & ((1 << IPCT_NEW) | (1 << IPCT_RELATED))) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 489 | type = IPCTNL_MSG_CT_NEW; |
| 490 | flags = NLM_F_CREATE|NLM_F_EXCL; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 491 | group = NFNLGRP_CONNTRACK_NEW; |
Pablo Neira Ayuso | 17e6e4e | 2009-06-02 20:08:46 +0200 | [diff] [blame] | 492 | } else if (events) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 493 | type = IPCTNL_MSG_CT_NEW; |
| 494 | group = NFNLGRP_CONNTRACK_UPDATE; |
| 495 | } else |
Pablo Neira Ayuso | e34d5c1 | 2009-06-03 10:32:06 +0200 | [diff] [blame] | 496 | return 0; |
Patrick McHardy | a242769 | 2006-03-20 18:03:59 -0800 | [diff] [blame] | 497 | |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 498 | net = nf_ct_net(ct); |
| 499 | if (!item->report && !nfnetlink_has_listeners(net, group)) |
Pablo Neira Ayuso | e34d5c1 | 2009-06-03 10:32:06 +0200 | [diff] [blame] | 500 | return 0; |
Patrick McHardy | a242769 | 2006-03-20 18:03:59 -0800 | [diff] [blame] | 501 | |
Pablo Neira Ayuso | 03b64f5 | 2009-06-02 20:08:27 +0200 | [diff] [blame] | 502 | skb = nlmsg_new(ctnetlink_nlmsg_size(ct), GFP_ATOMIC); |
| 503 | if (skb == NULL) |
Pablo Neira Ayuso | 150ace0 | 2009-04-17 17:47:31 +0200 | [diff] [blame] | 504 | goto errout; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 505 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 506 | type |= NFNL_SUBSYS_CTNETLINK << 8; |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 507 | nlh = nlmsg_put(skb, item->pid, 0, type, sizeof(*nfmsg), flags); |
| 508 | if (nlh == NULL) |
| 509 | goto nlmsg_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 510 | |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 511 | nfmsg = nlmsg_data(nlh); |
Patrick McHardy | 5e8fbe2 | 2008-04-14 11:15:52 +0200 | [diff] [blame] | 512 | nfmsg->nfgen_family = nf_ct_l3num(ct); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 513 | nfmsg->version = NFNETLINK_V0; |
| 514 | nfmsg->res_id = 0; |
| 515 | |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 516 | rcu_read_lock(); |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 517 | nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED); |
| 518 | if (!nest_parms) |
| 519 | goto nla_put_failure; |
Pablo Neira Ayuso | f2f3e38 | 2009-06-02 20:03:35 +0200 | [diff] [blame] | 520 | 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] | 521 | goto nla_put_failure; |
| 522 | nla_nest_end(skb, nest_parms); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 523 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 524 | nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED); |
| 525 | if (!nest_parms) |
| 526 | goto nla_put_failure; |
Pablo Neira Ayuso | f2f3e38 | 2009-06-02 20:03:35 +0200 | [diff] [blame] | 527 | 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] | 528 | goto nla_put_failure; |
| 529 | nla_nest_end(skb, nest_parms); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 530 | |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 531 | if (nf_ct_zone(ct)) |
| 532 | NLA_PUT_BE16(skb, CTA_ZONE, htons(nf_ct_zone(ct))); |
| 533 | |
Eric Leblond | 1eedf69 | 2008-05-13 23:27:11 -0700 | [diff] [blame] | 534 | if (ctnetlink_dump_id(skb, ct) < 0) |
| 535 | goto nla_put_failure; |
| 536 | |
Fabian Hugelshofer | e57dce6 | 2008-06-09 15:59:58 -0700 | [diff] [blame] | 537 | if (ctnetlink_dump_status(skb, ct) < 0) |
| 538 | goto nla_put_failure; |
| 539 | |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 540 | if (events & (1 << IPCT_DESTROY)) { |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 541 | if (ctnetlink_dump_counters(skb, ct, IP_CT_DIR_ORIGINAL) < 0 || |
| 542 | ctnetlink_dump_counters(skb, ct, IP_CT_DIR_REPLY) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 543 | goto nla_put_failure; |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 544 | } else { |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 545 | if (ctnetlink_dump_timeout(skb, ct) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 546 | goto nla_put_failure; |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 547 | |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 548 | if (events & (1 << IPCT_PROTOINFO) |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 549 | && ctnetlink_dump_protoinfo(skb, ct) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 550 | goto nla_put_failure; |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 551 | |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 552 | if ((events & (1 << IPCT_HELPER) || nfct_help(ct)) |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 553 | && ctnetlink_dump_helpinfo(skb, ct) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 554 | goto nla_put_failure; |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 555 | |
Pablo Neira Ayuso | 37fccd8 | 2007-12-17 22:28:41 -0800 | [diff] [blame] | 556 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 557 | if ((events & (1 << IPCT_SECMARK) || ct->secmark) |
Pablo Neira Ayuso | 37fccd8 | 2007-12-17 22:28:41 -0800 | [diff] [blame] | 558 | && ctnetlink_dump_secmark(skb, ct) < 0) |
| 559 | goto nla_put_failure; |
| 560 | #endif |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 561 | |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 562 | if (events & (1 << IPCT_RELATED) && |
Pablo Neira Ayuso | 0f417ce | 2007-12-17 22:28:19 -0800 | [diff] [blame] | 563 | ctnetlink_dump_master(skb, ct) < 0) |
| 564 | goto nla_put_failure; |
| 565 | |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 566 | if (events & (1 << IPCT_NATSEQADJ) && |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 567 | ctnetlink_dump_nat_seq_adj(skb, ct) < 0) |
| 568 | goto nla_put_failure; |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 569 | } |
Pablo Neira Ayuso | b9a37e0 | 2006-08-22 00:31:49 -0700 | [diff] [blame] | 570 | |
Eric Leblond | a83099a | 2008-01-31 04:44:27 -0800 | [diff] [blame] | 571 | #ifdef CONFIG_NF_CONNTRACK_MARK |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 572 | if ((events & (1 << IPCT_MARK) || ct->mark) |
Eric Leblond | a83099a | 2008-01-31 04:44:27 -0800 | [diff] [blame] | 573 | && ctnetlink_dump_mark(skb, ct) < 0) |
| 574 | goto nla_put_failure; |
| 575 | #endif |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 576 | rcu_read_unlock(); |
Eric Leblond | a83099a | 2008-01-31 04:44:27 -0800 | [diff] [blame] | 577 | |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 578 | nlmsg_end(skb, nlh); |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 579 | err = nfnetlink_send(skb, net, item->pid, group, item->report, |
Alexey Dobriyan | cd8c20b | 2010-01-13 16:02:14 +0100 | [diff] [blame] | 580 | GFP_ATOMIC); |
Pablo Neira Ayuso | dd7669a | 2009-06-13 12:30:52 +0200 | [diff] [blame] | 581 | if (err == -ENOBUFS || err == -EAGAIN) |
| 582 | return -ENOBUFS; |
| 583 | |
Pablo Neira Ayuso | e34d5c1 | 2009-06-03 10:32:06 +0200 | [diff] [blame] | 584 | return 0; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 585 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 586 | nla_put_failure: |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 587 | rcu_read_unlock(); |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 588 | nlmsg_cancel(skb, nlh); |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 589 | nlmsg_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 590 | kfree_skb(skb); |
Pablo Neira Ayuso | 150ace0 | 2009-04-17 17:47:31 +0200 | [diff] [blame] | 591 | errout: |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 592 | nfnetlink_set_err(net, 0, group, -ENOBUFS); |
Pablo Neira Ayuso | e34d5c1 | 2009-06-03 10:32:06 +0200 | [diff] [blame] | 593 | return 0; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 594 | } |
| 595 | #endif /* CONFIG_NF_CONNTRACK_EVENTS */ |
| 596 | |
| 597 | static int ctnetlink_done(struct netlink_callback *cb) |
| 598 | { |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 599 | if (cb->args[1]) |
| 600 | nf_ct_put((struct nf_conn *)cb->args[1]); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 601 | return 0; |
| 602 | } |
| 603 | |
| 604 | static int |
| 605 | ctnetlink_dump_table(struct sk_buff *skb, struct netlink_callback *cb) |
| 606 | { |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 607 | struct net *net = sock_net(skb->sk); |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 608 | struct nf_conn *ct, *last; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 609 | struct nf_conntrack_tuple_hash *h; |
Eric Dumazet | ea781f1 | 2009-03-25 21:05:46 +0100 | [diff] [blame] | 610 | struct hlist_nulls_node *n; |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 611 | struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh); |
Pablo Neira Ayuso | 87711cb | 2006-01-05 12:19:23 -0800 | [diff] [blame] | 612 | u_int8_t l3proto = nfmsg->nfgen_family; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 613 | |
Patrick McHardy | 76507f6 | 2008-01-31 04:38:38 -0800 | [diff] [blame] | 614 | rcu_read_lock(); |
Patrick McHardy | d205dc4 | 2006-08-17 18:12:38 -0700 | [diff] [blame] | 615 | last = (struct nf_conn *)cb->args[1]; |
Patrick McHardy | 9ab99d5 | 2010-02-10 14:17:10 +0100 | [diff] [blame] | 616 | for (; cb->args[0] < net->ct.htable_size; cb->args[0]++) { |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 617 | restart: |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 618 | hlist_nulls_for_each_entry_rcu(h, n, &net->ct.hash[cb->args[0]], |
Eric Dumazet | ea781f1 | 2009-03-25 21:05:46 +0100 | [diff] [blame] | 619 | hnnode) { |
Jozsef Kadlecsik | 5b1158e | 2006-12-02 22:07:13 -0800 | [diff] [blame] | 620 | if (NF_CT_DIRECTION(h) != IP_CT_DIR_ORIGINAL) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 621 | continue; |
| 622 | ct = nf_ct_tuplehash_to_ctrack(h); |
Eric Dumazet | ea781f1 | 2009-03-25 21:05:46 +0100 | [diff] [blame] | 623 | if (!atomic_inc_not_zero(&ct->ct_general.use)) |
| 624 | continue; |
Pablo Neira Ayuso | 87711cb | 2006-01-05 12:19:23 -0800 | [diff] [blame] | 625 | /* Dump entries of a given L3 protocol number. |
| 626 | * If it is not specified, ie. l3proto == 0, |
| 627 | * then dump everything. */ |
Patrick McHardy | 5e8fbe2 | 2008-04-14 11:15:52 +0200 | [diff] [blame] | 628 | if (l3proto && nf_ct_l3num(ct) != l3proto) |
Eric Dumazet | ea781f1 | 2009-03-25 21:05:46 +0100 | [diff] [blame] | 629 | goto releasect; |
Patrick McHardy | d205dc4 | 2006-08-17 18:12:38 -0700 | [diff] [blame] | 630 | if (cb->args[1]) { |
| 631 | if (ct != last) |
Eric Dumazet | ea781f1 | 2009-03-25 21:05:46 +0100 | [diff] [blame] | 632 | goto releasect; |
Patrick McHardy | d205dc4 | 2006-08-17 18:12:38 -0700 | [diff] [blame] | 633 | cb->args[1] = 0; |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 634 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 635 | if (ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).pid, |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 636 | cb->nlh->nlmsg_seq, |
Pablo Neira Ayuso | 8b0a231 | 2009-06-02 20:03:34 +0200 | [diff] [blame] | 637 | IPCTNL_MSG_CT_NEW, ct) < 0) { |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 638 | cb->args[1] = (unsigned long)ct; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 639 | goto out; |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 640 | } |
Krzysztof Piotr Oledzki | 5840157 | 2008-07-21 10:01:34 -0700 | [diff] [blame] | 641 | |
Pablo Neira Ayuso | 01f3484 | 2006-09-20 12:00:45 -0700 | [diff] [blame] | 642 | if (NFNL_MSG_TYPE(cb->nlh->nlmsg_type) == |
Krzysztof Piotr Oledzki | 5840157 | 2008-07-21 10:01:34 -0700 | [diff] [blame] | 643 | IPCTNL_MSG_CT_GET_CTRZERO) { |
| 644 | struct nf_conn_counter *acct; |
| 645 | |
| 646 | acct = nf_conn_acct_find(ct); |
| 647 | if (acct) |
| 648 | memset(acct, 0, sizeof(struct nf_conn_counter[IP_CT_DIR_MAX])); |
| 649 | } |
Eric Dumazet | ea781f1 | 2009-03-25 21:05:46 +0100 | [diff] [blame] | 650 | releasect: |
| 651 | nf_ct_put(ct); |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 652 | } |
Patrick McHardy | d205dc4 | 2006-08-17 18:12:38 -0700 | [diff] [blame] | 653 | if (cb->args[1]) { |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 654 | cb->args[1] = 0; |
| 655 | goto restart; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 656 | } |
| 657 | } |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 658 | out: |
Patrick McHardy | 76507f6 | 2008-01-31 04:38:38 -0800 | [diff] [blame] | 659 | rcu_read_unlock(); |
Patrick McHardy | d205dc4 | 2006-08-17 18:12:38 -0700 | [diff] [blame] | 660 | if (last) |
| 661 | nf_ct_put(last); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 662 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 663 | return skb->len; |
| 664 | } |
| 665 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 666 | static inline int |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 667 | ctnetlink_parse_tuple_ip(struct nlattr *attr, struct nf_conntrack_tuple *tuple) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 668 | { |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 669 | struct nlattr *tb[CTA_IP_MAX+1]; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 670 | struct nf_conntrack_l3proto *l3proto; |
| 671 | int ret = 0; |
| 672 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 673 | nla_parse_nested(tb, CTA_IP_MAX, attr, NULL); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 674 | |
Florian Westphal | cd91566 | 2009-03-18 17:28:37 +0100 | [diff] [blame] | 675 | rcu_read_lock(); |
| 676 | l3proto = __nf_ct_l3proto_find(tuple->src.l3num); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 677 | |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 678 | if (likely(l3proto->nlattr_to_tuple)) { |
| 679 | ret = nla_validate_nested(attr, CTA_IP_MAX, |
| 680 | l3proto->nla_policy); |
| 681 | if (ret == 0) |
| 682 | ret = l3proto->nlattr_to_tuple(tb, tuple); |
| 683 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 684 | |
Florian Westphal | cd91566 | 2009-03-18 17:28:37 +0100 | [diff] [blame] | 685 | rcu_read_unlock(); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 686 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 687 | return ret; |
| 688 | } |
| 689 | |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 690 | static const struct nla_policy proto_nla_policy[CTA_PROTO_MAX+1] = { |
| 691 | [CTA_PROTO_NUM] = { .type = NLA_U8 }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 692 | }; |
| 693 | |
| 694 | static inline int |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 695 | ctnetlink_parse_tuple_proto(struct nlattr *attr, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 696 | struct nf_conntrack_tuple *tuple) |
| 697 | { |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 698 | struct nlattr *tb[CTA_PROTO_MAX+1]; |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 699 | struct nf_conntrack_l4proto *l4proto; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 700 | int ret = 0; |
| 701 | |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 702 | ret = nla_parse_nested(tb, CTA_PROTO_MAX, attr, proto_nla_policy); |
| 703 | if (ret < 0) |
| 704 | return ret; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 705 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 706 | if (!tb[CTA_PROTO_NUM]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 707 | return -EINVAL; |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 708 | tuple->dst.protonum = nla_get_u8(tb[CTA_PROTO_NUM]); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 709 | |
Florian Westphal | cd91566 | 2009-03-18 17:28:37 +0100 | [diff] [blame] | 710 | rcu_read_lock(); |
| 711 | l4proto = __nf_ct_l4proto_find(tuple->src.l3num, tuple->dst.protonum); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 712 | |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 713 | if (likely(l4proto->nlattr_to_tuple)) { |
| 714 | ret = nla_validate_nested(attr, CTA_PROTO_MAX, |
| 715 | l4proto->nla_policy); |
| 716 | if (ret == 0) |
| 717 | ret = l4proto->nlattr_to_tuple(tb, tuple); |
| 718 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 719 | |
Florian Westphal | cd91566 | 2009-03-18 17:28:37 +0100 | [diff] [blame] | 720 | rcu_read_unlock(); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 721 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 722 | return ret; |
| 723 | } |
| 724 | |
Patrick McHardy | d0b0268 | 2010-02-10 15:38:33 +0100 | [diff] [blame] | 725 | static const struct nla_policy tuple_nla_policy[CTA_TUPLE_MAX+1] = { |
| 726 | [CTA_TUPLE_IP] = { .type = NLA_NESTED }, |
| 727 | [CTA_TUPLE_PROTO] = { .type = NLA_NESTED }, |
| 728 | }; |
| 729 | |
Ilpo Järvinen | bb5cf80 | 2008-01-05 23:11:31 -0800 | [diff] [blame] | 730 | static int |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 731 | ctnetlink_parse_tuple(const struct nlattr * const cda[], |
| 732 | struct nf_conntrack_tuple *tuple, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 733 | enum ctattr_tuple type, u_int8_t l3num) |
| 734 | { |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 735 | struct nlattr *tb[CTA_TUPLE_MAX+1]; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 736 | int err; |
| 737 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 738 | memset(tuple, 0, sizeof(*tuple)); |
| 739 | |
Patrick McHardy | d0b0268 | 2010-02-10 15:38:33 +0100 | [diff] [blame] | 740 | nla_parse_nested(tb, CTA_TUPLE_MAX, cda[type], tuple_nla_policy); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 741 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 742 | if (!tb[CTA_TUPLE_IP]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 743 | return -EINVAL; |
| 744 | |
| 745 | tuple->src.l3num = l3num; |
| 746 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 747 | err = ctnetlink_parse_tuple_ip(tb[CTA_TUPLE_IP], tuple); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 748 | if (err < 0) |
| 749 | return err; |
| 750 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 751 | if (!tb[CTA_TUPLE_PROTO]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 752 | return -EINVAL; |
| 753 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 754 | err = ctnetlink_parse_tuple_proto(tb[CTA_TUPLE_PROTO], tuple); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 755 | if (err < 0) |
| 756 | return err; |
| 757 | |
| 758 | /* orig and expect tuples get DIR_ORIGINAL */ |
| 759 | if (type == CTA_TUPLE_REPLY) |
| 760 | tuple->dst.dir = IP_CT_DIR_REPLY; |
| 761 | else |
| 762 | tuple->dst.dir = IP_CT_DIR_ORIGINAL; |
| 763 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 764 | return 0; |
| 765 | } |
| 766 | |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 767 | static int |
| 768 | ctnetlink_parse_zone(const struct nlattr *attr, u16 *zone) |
| 769 | { |
| 770 | if (attr) |
| 771 | #ifdef CONFIG_NF_CONNTRACK_ZONES |
| 772 | *zone = ntohs(nla_get_be16(attr)); |
| 773 | #else |
| 774 | return -EOPNOTSUPP; |
| 775 | #endif |
| 776 | else |
| 777 | *zone = 0; |
| 778 | |
| 779 | return 0; |
| 780 | } |
| 781 | |
Patrick McHardy | d0b0268 | 2010-02-10 15:38:33 +0100 | [diff] [blame] | 782 | static const struct nla_policy help_nla_policy[CTA_HELP_MAX+1] = { |
| 783 | [CTA_HELP_NAME] = { .type = NLA_NUL_STRING }, |
| 784 | }; |
| 785 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 786 | static inline int |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 787 | ctnetlink_parse_help(const struct nlattr *attr, char **helper_name) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 788 | { |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 789 | struct nlattr *tb[CTA_HELP_MAX+1]; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 790 | |
Patrick McHardy | d0b0268 | 2010-02-10 15:38:33 +0100 | [diff] [blame] | 791 | nla_parse_nested(tb, CTA_HELP_MAX, attr, help_nla_policy); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 792 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 793 | if (!tb[CTA_HELP_NAME]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 794 | return -EINVAL; |
| 795 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 796 | *helper_name = nla_data(tb[CTA_HELP_NAME]); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 797 | |
| 798 | return 0; |
| 799 | } |
| 800 | |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 801 | static const struct nla_policy ct_nla_policy[CTA_MAX+1] = { |
Patrick McHardy | d0b0268 | 2010-02-10 15:38:33 +0100 | [diff] [blame] | 802 | [CTA_TUPLE_ORIG] = { .type = NLA_NESTED }, |
| 803 | [CTA_TUPLE_REPLY] = { .type = NLA_NESTED }, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 804 | [CTA_STATUS] = { .type = NLA_U32 }, |
Patrick McHardy | d0b0268 | 2010-02-10 15:38:33 +0100 | [diff] [blame] | 805 | [CTA_PROTOINFO] = { .type = NLA_NESTED }, |
| 806 | [CTA_HELP] = { .type = NLA_NESTED }, |
| 807 | [CTA_NAT_SRC] = { .type = NLA_NESTED }, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 808 | [CTA_TIMEOUT] = { .type = NLA_U32 }, |
| 809 | [CTA_MARK] = { .type = NLA_U32 }, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 810 | [CTA_ID] = { .type = NLA_U32 }, |
Patrick McHardy | d0b0268 | 2010-02-10 15:38:33 +0100 | [diff] [blame] | 811 | [CTA_NAT_DST] = { .type = NLA_NESTED }, |
| 812 | [CTA_TUPLE_MASTER] = { .type = NLA_NESTED }, |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 813 | [CTA_ZONE] = { .type = NLA_U16 }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 814 | }; |
| 815 | |
| 816 | static int |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 817 | ctnetlink_del_conntrack(struct sock *ctnl, struct sk_buff *skb, |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 818 | const struct nlmsghdr *nlh, |
| 819 | const struct nlattr * const cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 820 | { |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 821 | struct net *net = sock_net(ctnl); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 822 | struct nf_conntrack_tuple_hash *h; |
| 823 | struct nf_conntrack_tuple tuple; |
| 824 | struct nf_conn *ct; |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 825 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 826 | u_int8_t u3 = nfmsg->nfgen_family; |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 827 | u16 zone; |
| 828 | int err; |
| 829 | |
| 830 | err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone); |
| 831 | if (err < 0) |
| 832 | return err; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 833 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 834 | if (cda[CTA_TUPLE_ORIG]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 835 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, u3); |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 836 | else if (cda[CTA_TUPLE_REPLY]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 837 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, u3); |
| 838 | else { |
| 839 | /* Flush the whole table */ |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 840 | nf_conntrack_flush_report(net, |
Pablo Neira Ayuso | 274d383 | 2009-06-02 20:08:38 +0200 | [diff] [blame] | 841 | NETLINK_CB(skb).pid, |
| 842 | nlmsg_report(nlh)); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 843 | return 0; |
| 844 | } |
| 845 | |
| 846 | if (err < 0) |
| 847 | return err; |
| 848 | |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 849 | h = nf_conntrack_find_get(net, zone, &tuple); |
Pablo Neira Ayuso | 9ea8cfd | 2006-10-12 14:09:16 -0700 | [diff] [blame] | 850 | if (!h) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 851 | return -ENOENT; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 852 | |
| 853 | ct = nf_ct_tuplehash_to_ctrack(h); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 854 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 855 | if (cda[CTA_ID]) { |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 856 | u_int32_t id = ntohl(nla_get_be32(cda[CTA_ID])); |
Patrick McHardy | 7f85f91 | 2007-09-28 14:41:27 -0700 | [diff] [blame] | 857 | if (id != (u32)(unsigned long)ct) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 858 | nf_ct_put(ct); |
| 859 | return -ENOENT; |
| 860 | } |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 861 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 862 | |
Pablo Neira Ayuso | dd7669a | 2009-06-13 12:30:52 +0200 | [diff] [blame] | 863 | if (nf_conntrack_event_report(IPCT_DESTROY, ct, |
| 864 | NETLINK_CB(skb).pid, |
| 865 | nlmsg_report(nlh)) < 0) { |
| 866 | nf_ct_delete_from_lists(ct); |
| 867 | /* we failed to report the event, try later */ |
| 868 | nf_ct_insert_dying_list(ct); |
| 869 | nf_ct_put(ct); |
| 870 | return 0; |
| 871 | } |
Pablo Neira Ayuso | 19abb7b | 2008-11-18 11:56:20 +0100 | [diff] [blame] | 872 | |
| 873 | /* death_by_timeout would report the event again */ |
| 874 | set_bit(IPS_DYING_BIT, &ct->status); |
| 875 | |
Patrick McHardy | 5109176 | 2008-06-09 15:59:06 -0700 | [diff] [blame] | 876 | nf_ct_kill(ct); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 877 | nf_ct_put(ct); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 878 | |
| 879 | return 0; |
| 880 | } |
| 881 | |
| 882 | static int |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 883 | ctnetlink_get_conntrack(struct sock *ctnl, struct sk_buff *skb, |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 884 | const struct nlmsghdr *nlh, |
| 885 | const struct nlattr * const cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 886 | { |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 887 | struct net *net = sock_net(ctnl); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 888 | struct nf_conntrack_tuple_hash *h; |
| 889 | struct nf_conntrack_tuple tuple; |
| 890 | struct nf_conn *ct; |
| 891 | struct sk_buff *skb2 = NULL; |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 892 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 893 | u_int8_t u3 = nfmsg->nfgen_family; |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 894 | u16 zone; |
| 895 | int err; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 896 | |
Krzysztof Piotr Oledzki | 5840157 | 2008-07-21 10:01:34 -0700 | [diff] [blame] | 897 | if (nlh->nlmsg_flags & NLM_F_DUMP) |
Thomas Graf | c702e80 | 2007-03-22 23:30:55 -0700 | [diff] [blame] | 898 | return netlink_dump_start(ctnl, skb, nlh, ctnetlink_dump_table, |
| 899 | ctnetlink_done); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 900 | |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 901 | err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone); |
| 902 | if (err < 0) |
| 903 | return err; |
| 904 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 905 | if (cda[CTA_TUPLE_ORIG]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 906 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, u3); |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 907 | else if (cda[CTA_TUPLE_REPLY]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 908 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, u3); |
| 909 | else |
| 910 | return -EINVAL; |
| 911 | |
| 912 | if (err < 0) |
| 913 | return err; |
| 914 | |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 915 | h = nf_conntrack_find_get(net, zone, &tuple); |
Pablo Neira Ayuso | 9ea8cfd | 2006-10-12 14:09:16 -0700 | [diff] [blame] | 916 | if (!h) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 917 | return -ENOENT; |
Pablo Neira Ayuso | 9ea8cfd | 2006-10-12 14:09:16 -0700 | [diff] [blame] | 918 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 919 | ct = nf_ct_tuplehash_to_ctrack(h); |
| 920 | |
| 921 | err = -ENOMEM; |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 922 | skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
| 923 | if (skb2 == NULL) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 924 | nf_ct_put(ct); |
| 925 | return -ENOMEM; |
| 926 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 927 | |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 928 | rcu_read_lock(); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 929 | err = ctnetlink_fill_info(skb2, NETLINK_CB(skb).pid, nlh->nlmsg_seq, |
Pablo Neira Ayuso | 8b0a231 | 2009-06-02 20:03:34 +0200 | [diff] [blame] | 930 | IPCTNL_MSG_CT_NEW, ct); |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 931 | rcu_read_unlock(); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 932 | nf_ct_put(ct); |
| 933 | if (err <= 0) |
| 934 | goto free; |
| 935 | |
| 936 | err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).pid, MSG_DONTWAIT); |
| 937 | if (err < 0) |
| 938 | goto out; |
| 939 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 940 | return 0; |
| 941 | |
| 942 | free: |
| 943 | kfree_skb(skb2); |
| 944 | out: |
| 945 | return err; |
| 946 | } |
| 947 | |
Pablo Neira Ayuso | 6767184 | 2008-10-20 03:34:27 -0700 | [diff] [blame] | 948 | #ifdef CONFIG_NF_NAT_NEEDED |
Ilpo Järvinen | bb5cf80 | 2008-01-05 23:11:31 -0800 | [diff] [blame] | 949 | static int |
Pablo Neira Ayuso | e6a7d3c | 2008-10-14 11:58:31 -0700 | [diff] [blame] | 950 | ctnetlink_parse_nat_setup(struct nf_conn *ct, |
| 951 | enum nf_nat_manip_type manip, |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 952 | const struct nlattr *attr) |
Pablo Neira Ayuso | e6a7d3c | 2008-10-14 11:58:31 -0700 | [diff] [blame] | 953 | { |
| 954 | typeof(nfnetlink_parse_nat_setup_hook) parse_nat_setup; |
| 955 | |
| 956 | parse_nat_setup = rcu_dereference(nfnetlink_parse_nat_setup_hook); |
| 957 | if (!parse_nat_setup) { |
Johannes Berg | 95a5afc | 2008-10-16 15:24:51 -0700 | [diff] [blame] | 958 | #ifdef CONFIG_MODULES |
Pablo Neira Ayuso | e6a7d3c | 2008-10-14 11:58:31 -0700 | [diff] [blame] | 959 | rcu_read_unlock(); |
Patrick McHardy | 748085f | 2009-01-21 12:19:49 -0800 | [diff] [blame] | 960 | spin_unlock_bh(&nf_conntrack_lock); |
Pablo Neira Ayuso | e6a7d3c | 2008-10-14 11:58:31 -0700 | [diff] [blame] | 961 | nfnl_unlock(); |
| 962 | if (request_module("nf-nat-ipv4") < 0) { |
| 963 | nfnl_lock(); |
Patrick McHardy | 748085f | 2009-01-21 12:19:49 -0800 | [diff] [blame] | 964 | spin_lock_bh(&nf_conntrack_lock); |
Pablo Neira Ayuso | e6a7d3c | 2008-10-14 11:58:31 -0700 | [diff] [blame] | 965 | rcu_read_lock(); |
| 966 | return -EOPNOTSUPP; |
| 967 | } |
| 968 | nfnl_lock(); |
Patrick McHardy | 748085f | 2009-01-21 12:19:49 -0800 | [diff] [blame] | 969 | spin_lock_bh(&nf_conntrack_lock); |
Pablo Neira Ayuso | e6a7d3c | 2008-10-14 11:58:31 -0700 | [diff] [blame] | 970 | rcu_read_lock(); |
| 971 | if (nfnetlink_parse_nat_setup_hook) |
| 972 | return -EAGAIN; |
| 973 | #endif |
| 974 | return -EOPNOTSUPP; |
| 975 | } |
| 976 | |
| 977 | return parse_nat_setup(ct, manip, attr); |
| 978 | } |
Pablo Neira Ayuso | 6767184 | 2008-10-20 03:34:27 -0700 | [diff] [blame] | 979 | #endif |
Pablo Neira Ayuso | e6a7d3c | 2008-10-14 11:58:31 -0700 | [diff] [blame] | 980 | |
| 981 | static int |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 982 | 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] | 983 | { |
| 984 | unsigned long d; |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 985 | unsigned int status = ntohl(nla_get_be32(cda[CTA_STATUS])); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 986 | d = ct->status ^ status; |
| 987 | |
| 988 | if (d & (IPS_EXPECTED|IPS_CONFIRMED|IPS_DYING)) |
| 989 | /* unchangeable */ |
Pablo Neira Ayuso | 0adf9d6 | 2008-06-09 15:56:20 -0700 | [diff] [blame] | 990 | return -EBUSY; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 991 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 992 | if (d & IPS_SEEN_REPLY && !(status & IPS_SEEN_REPLY)) |
| 993 | /* SEEN_REPLY bit can only be set */ |
Pablo Neira Ayuso | 0adf9d6 | 2008-06-09 15:56:20 -0700 | [diff] [blame] | 994 | return -EBUSY; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 995 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 996 | if (d & IPS_ASSURED && !(status & IPS_ASSURED)) |
| 997 | /* ASSURED bit can only be set */ |
Pablo Neira Ayuso | 0adf9d6 | 2008-06-09 15:56:20 -0700 | [diff] [blame] | 998 | return -EBUSY; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 999 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1000 | /* Be careful here, modifying NAT bits can screw up things, |
| 1001 | * 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] | 1002 | * nf_nat_range. */ |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1003 | ct->status |= status & ~(IPS_NAT_DONE_MASK | IPS_NAT_MASK); |
| 1004 | return 0; |
| 1005 | } |
| 1006 | |
Pablo Neira Ayuso | e6a7d3c | 2008-10-14 11:58:31 -0700 | [diff] [blame] | 1007 | static int |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 1008 | ctnetlink_change_nat(struct nf_conn *ct, const struct nlattr * const cda[]) |
Pablo Neira Ayuso | e6a7d3c | 2008-10-14 11:58:31 -0700 | [diff] [blame] | 1009 | { |
| 1010 | #ifdef CONFIG_NF_NAT_NEEDED |
| 1011 | int ret; |
| 1012 | |
| 1013 | if (cda[CTA_NAT_DST]) { |
| 1014 | ret = ctnetlink_parse_nat_setup(ct, |
| 1015 | IP_NAT_MANIP_DST, |
| 1016 | cda[CTA_NAT_DST]); |
| 1017 | if (ret < 0) |
| 1018 | return ret; |
| 1019 | } |
| 1020 | if (cda[CTA_NAT_SRC]) { |
| 1021 | ret = ctnetlink_parse_nat_setup(ct, |
| 1022 | IP_NAT_MANIP_SRC, |
| 1023 | cda[CTA_NAT_SRC]); |
| 1024 | if (ret < 0) |
| 1025 | return ret; |
| 1026 | } |
| 1027 | return 0; |
| 1028 | #else |
| 1029 | return -EOPNOTSUPP; |
| 1030 | #endif |
| 1031 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1032 | |
| 1033 | static inline int |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 1034 | ctnetlink_change_helper(struct nf_conn *ct, const struct nlattr * const cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1035 | { |
| 1036 | struct nf_conntrack_helper *helper; |
Harald Welte | dc808fe | 2006-03-20 17:56:32 -0800 | [diff] [blame] | 1037 | struct nf_conn_help *help = nfct_help(ct); |
Pablo Neira Ayuso | 29fe1b4 | 2009-04-22 02:26:37 -0700 | [diff] [blame] | 1038 | char *helpname = NULL; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1039 | int err; |
| 1040 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1041 | /* don't change helper of sibling connections */ |
| 1042 | if (ct->master) |
Pablo Neira Ayuso | 0adf9d6 | 2008-06-09 15:56:20 -0700 | [diff] [blame] | 1043 | return -EBUSY; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1044 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1045 | err = ctnetlink_parse_help(cda[CTA_HELP], &helpname); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1046 | if (err < 0) |
| 1047 | return err; |
| 1048 | |
Yasuyuki Kozakai | df293bb | 2007-05-10 14:15:58 -0700 | [diff] [blame] | 1049 | if (!strcmp(helpname, "")) { |
| 1050 | if (help && help->helper) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1051 | /* we had a helper before ... */ |
| 1052 | nf_ct_remove_expectations(ct); |
Patrick McHarrdy | 3c158f7 | 2007-06-05 12:55:27 -0700 | [diff] [blame] | 1053 | rcu_assign_pointer(help->helper, NULL); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1054 | } |
Yasuyuki Kozakai | df293bb | 2007-05-10 14:15:58 -0700 | [diff] [blame] | 1055 | |
| 1056 | return 0; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1057 | } |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1058 | |
Patrick McHardy | 794e687 | 2010-02-03 13:41:29 +0100 | [diff] [blame] | 1059 | helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct), |
| 1060 | nf_ct_protonum(ct)); |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1061 | if (helper == NULL) { |
| 1062 | #ifdef CONFIG_MODULES |
| 1063 | spin_unlock_bh(&nf_conntrack_lock); |
| 1064 | |
| 1065 | if (request_module("nfct-helper-%s", helpname) < 0) { |
| 1066 | spin_lock_bh(&nf_conntrack_lock); |
| 1067 | return -EOPNOTSUPP; |
| 1068 | } |
| 1069 | |
| 1070 | spin_lock_bh(&nf_conntrack_lock); |
Patrick McHardy | 794e687 | 2010-02-03 13:41:29 +0100 | [diff] [blame] | 1071 | helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct), |
| 1072 | nf_ct_protonum(ct)); |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1073 | if (helper) |
| 1074 | return -EAGAIN; |
| 1075 | #endif |
Pablo Neira Ayuso | 0adf9d6 | 2008-06-09 15:56:20 -0700 | [diff] [blame] | 1076 | return -EOPNOTSUPP; |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1077 | } |
Yasuyuki Kozakai | df293bb | 2007-05-10 14:15:58 -0700 | [diff] [blame] | 1078 | |
Yasuyuki Kozakai | ceceae1 | 2007-07-07 22:23:42 -0700 | [diff] [blame] | 1079 | if (help) { |
| 1080 | if (help->helper == helper) |
| 1081 | return 0; |
| 1082 | if (help->helper) |
| 1083 | return -EBUSY; |
| 1084 | /* need to zero data of old helper */ |
| 1085 | memset(&help->help, 0, sizeof(help->help)); |
| 1086 | } else { |
Pablo Neira Ayuso | a88e22a | 2010-02-19 14:24:39 +0100 | [diff] [blame] | 1087 | /* we cannot set a helper for an existing conntrack */ |
| 1088 | return -EOPNOTSUPP; |
Yasuyuki Kozakai | ceceae1 | 2007-07-07 22:23:42 -0700 | [diff] [blame] | 1089 | } |
Yasuyuki Kozakai | df293bb | 2007-05-10 14:15:58 -0700 | [diff] [blame] | 1090 | |
Patrick McHarrdy | 3c158f7 | 2007-06-05 12:55:27 -0700 | [diff] [blame] | 1091 | rcu_assign_pointer(help->helper, helper); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1092 | |
| 1093 | return 0; |
| 1094 | } |
| 1095 | |
| 1096 | static inline int |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 1097 | ctnetlink_change_timeout(struct nf_conn *ct, const struct nlattr * const cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1098 | { |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 1099 | u_int32_t timeout = ntohl(nla_get_be32(cda[CTA_TIMEOUT])); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1100 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1101 | if (!del_timer(&ct->timeout)) |
| 1102 | return -ETIME; |
| 1103 | |
| 1104 | ct->timeout.expires = jiffies + timeout * HZ; |
| 1105 | add_timer(&ct->timeout); |
| 1106 | |
| 1107 | return 0; |
| 1108 | } |
| 1109 | |
Patrick McHardy | d0b0268 | 2010-02-10 15:38:33 +0100 | [diff] [blame] | 1110 | static const struct nla_policy protoinfo_policy[CTA_PROTOINFO_MAX+1] = { |
| 1111 | [CTA_PROTOINFO_TCP] = { .type = NLA_NESTED }, |
| 1112 | [CTA_PROTOINFO_DCCP] = { .type = NLA_NESTED }, |
| 1113 | [CTA_PROTOINFO_SCTP] = { .type = NLA_NESTED }, |
| 1114 | }; |
| 1115 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1116 | static inline int |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 1117 | ctnetlink_change_protoinfo(struct nf_conn *ct, const struct nlattr * const cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1118 | { |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 1119 | const struct nlattr *attr = cda[CTA_PROTOINFO]; |
| 1120 | struct nlattr *tb[CTA_PROTOINFO_MAX+1]; |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 1121 | struct nf_conntrack_l4proto *l4proto; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1122 | int err = 0; |
| 1123 | |
Patrick McHardy | d0b0268 | 2010-02-10 15:38:33 +0100 | [diff] [blame] | 1124 | nla_parse_nested(tb, CTA_PROTOINFO_MAX, attr, protoinfo_policy); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1125 | |
Florian Westphal | cd91566 | 2009-03-18 17:28:37 +0100 | [diff] [blame] | 1126 | rcu_read_lock(); |
| 1127 | 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] | 1128 | if (l4proto->from_nlattr) |
| 1129 | err = l4proto->from_nlattr(tb, ct); |
Florian Westphal | cd91566 | 2009-03-18 17:28:37 +0100 | [diff] [blame] | 1130 | rcu_read_unlock(); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1131 | |
| 1132 | return err; |
| 1133 | } |
| 1134 | |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1135 | #ifdef CONFIG_NF_NAT_NEEDED |
Patrick McHardy | d0b0268 | 2010-02-10 15:38:33 +0100 | [diff] [blame] | 1136 | static const struct nla_policy nat_seq_policy[CTA_NAT_SEQ_MAX+1] = { |
| 1137 | [CTA_NAT_SEQ_CORRECTION_POS] = { .type = NLA_U32 }, |
| 1138 | [CTA_NAT_SEQ_OFFSET_BEFORE] = { .type = NLA_U32 }, |
| 1139 | [CTA_NAT_SEQ_OFFSET_AFTER] = { .type = NLA_U32 }, |
| 1140 | }; |
| 1141 | |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1142 | static inline int |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 1143 | change_nat_seq_adj(struct nf_nat_seq *natseq, const struct nlattr * const attr) |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1144 | { |
| 1145 | struct nlattr *cda[CTA_NAT_SEQ_MAX+1]; |
| 1146 | |
Patrick McHardy | d0b0268 | 2010-02-10 15:38:33 +0100 | [diff] [blame] | 1147 | nla_parse_nested(cda, CTA_NAT_SEQ_MAX, attr, nat_seq_policy); |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1148 | |
| 1149 | if (!cda[CTA_NAT_SEQ_CORRECTION_POS]) |
| 1150 | return -EINVAL; |
| 1151 | |
| 1152 | natseq->correction_pos = |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 1153 | ntohl(nla_get_be32(cda[CTA_NAT_SEQ_CORRECTION_POS])); |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1154 | |
| 1155 | if (!cda[CTA_NAT_SEQ_OFFSET_BEFORE]) |
| 1156 | return -EINVAL; |
| 1157 | |
| 1158 | natseq->offset_before = |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 1159 | ntohl(nla_get_be32(cda[CTA_NAT_SEQ_OFFSET_BEFORE])); |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1160 | |
| 1161 | if (!cda[CTA_NAT_SEQ_OFFSET_AFTER]) |
| 1162 | return -EINVAL; |
| 1163 | |
| 1164 | natseq->offset_after = |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 1165 | ntohl(nla_get_be32(cda[CTA_NAT_SEQ_OFFSET_AFTER])); |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1166 | |
| 1167 | return 0; |
| 1168 | } |
| 1169 | |
| 1170 | static int |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 1171 | ctnetlink_change_nat_seq_adj(struct nf_conn *ct, |
| 1172 | const struct nlattr * const cda[]) |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1173 | { |
| 1174 | int ret = 0; |
| 1175 | struct nf_conn_nat *nat = nfct_nat(ct); |
| 1176 | |
| 1177 | if (!nat) |
| 1178 | return 0; |
| 1179 | |
| 1180 | if (cda[CTA_NAT_SEQ_ADJ_ORIG]) { |
| 1181 | ret = change_nat_seq_adj(&nat->seq[IP_CT_DIR_ORIGINAL], |
| 1182 | cda[CTA_NAT_SEQ_ADJ_ORIG]); |
| 1183 | if (ret < 0) |
| 1184 | return ret; |
| 1185 | |
| 1186 | ct->status |= IPS_SEQ_ADJUST; |
| 1187 | } |
| 1188 | |
| 1189 | if (cda[CTA_NAT_SEQ_ADJ_REPLY]) { |
| 1190 | ret = change_nat_seq_adj(&nat->seq[IP_CT_DIR_REPLY], |
| 1191 | cda[CTA_NAT_SEQ_ADJ_REPLY]); |
| 1192 | if (ret < 0) |
| 1193 | return ret; |
| 1194 | |
| 1195 | ct->status |= IPS_SEQ_ADJUST; |
| 1196 | } |
| 1197 | |
| 1198 | return 0; |
| 1199 | } |
| 1200 | #endif |
| 1201 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1202 | static int |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 1203 | ctnetlink_change_conntrack(struct nf_conn *ct, |
| 1204 | const struct nlattr * const cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1205 | { |
| 1206 | int err; |
| 1207 | |
Pablo Neira Ayuso | e098360 | 2009-03-16 15:27:22 +0100 | [diff] [blame] | 1208 | /* only allow NAT changes and master assignation for new conntracks */ |
| 1209 | if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST] || cda[CTA_TUPLE_MASTER]) |
| 1210 | return -EOPNOTSUPP; |
| 1211 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1212 | if (cda[CTA_HELP]) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1213 | err = ctnetlink_change_helper(ct, cda); |
| 1214 | if (err < 0) |
| 1215 | return err; |
| 1216 | } |
| 1217 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1218 | if (cda[CTA_TIMEOUT]) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1219 | err = ctnetlink_change_timeout(ct, cda); |
| 1220 | if (err < 0) |
| 1221 | return err; |
| 1222 | } |
| 1223 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1224 | if (cda[CTA_STATUS]) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1225 | err = ctnetlink_change_status(ct, cda); |
| 1226 | if (err < 0) |
| 1227 | return err; |
| 1228 | } |
| 1229 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1230 | if (cda[CTA_PROTOINFO]) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1231 | err = ctnetlink_change_protoinfo(ct, cda); |
| 1232 | if (err < 0) |
| 1233 | return err; |
| 1234 | } |
| 1235 | |
Martin Josefsson | bcd1e83 | 2006-04-01 02:23:21 -0800 | [diff] [blame] | 1236 | #if defined(CONFIG_NF_CONNTRACK_MARK) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1237 | if (cda[CTA_MARK]) |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 1238 | ct->mark = ntohl(nla_get_be32(cda[CTA_MARK])); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1239 | #endif |
| 1240 | |
Pablo Neira Ayuso | 13eae15 | 2007-12-17 22:28:00 -0800 | [diff] [blame] | 1241 | #ifdef CONFIG_NF_NAT_NEEDED |
| 1242 | if (cda[CTA_NAT_SEQ_ADJ_ORIG] || cda[CTA_NAT_SEQ_ADJ_REPLY]) { |
| 1243 | err = ctnetlink_change_nat_seq_adj(ct, cda); |
| 1244 | if (err < 0) |
| 1245 | return err; |
| 1246 | } |
| 1247 | #endif |
| 1248 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1249 | return 0; |
| 1250 | } |
| 1251 | |
Pablo Neira Ayuso | f0a3c08 | 2009-03-16 15:28:09 +0100 | [diff] [blame] | 1252 | static struct nf_conn * |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 1253 | ctnetlink_create_conntrack(struct net *net, u16 zone, |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 1254 | const struct nlattr * const cda[], |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1255 | struct nf_conntrack_tuple *otuple, |
Pablo Neira Ayuso | 5faa1f4 | 2007-09-28 14:43:53 -0700 | [diff] [blame] | 1256 | struct nf_conntrack_tuple *rtuple, |
Pablo Neira Ayuso | 7ec4749 | 2009-03-16 15:25:46 +0100 | [diff] [blame] | 1257 | u8 u3) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1258 | { |
| 1259 | struct nf_conn *ct; |
| 1260 | int err = -EINVAL; |
Yasuyuki Kozakai | ceceae1 | 2007-07-07 22:23:42 -0700 | [diff] [blame] | 1261 | struct nf_conntrack_helper *helper; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1262 | |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 1263 | ct = nf_conntrack_alloc(net, zone, otuple, rtuple, GFP_ATOMIC); |
Julia Lawall | cd7fcbf | 2009-01-12 00:06:08 +0000 | [diff] [blame] | 1264 | if (IS_ERR(ct)) |
Pablo Neira Ayuso | f0a3c08 | 2009-03-16 15:28:09 +0100 | [diff] [blame] | 1265 | return ERR_PTR(-ENOMEM); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1266 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1267 | if (!cda[CTA_TIMEOUT]) |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1268 | goto err1; |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 1269 | ct->timeout.expires = ntohl(nla_get_be32(cda[CTA_TIMEOUT])); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1270 | |
| 1271 | ct->timeout.expires = jiffies + ct->timeout.expires * HZ; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1272 | |
Patrick McHardy | 58a3c9b | 2008-01-31 04:36:54 -0800 | [diff] [blame] | 1273 | rcu_read_lock(); |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1274 | if (cda[CTA_HELP]) { |
Pablo Neira Ayuso | 29fe1b4 | 2009-04-22 02:26:37 -0700 | [diff] [blame] | 1275 | char *helpname = NULL; |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1276 | |
| 1277 | err = ctnetlink_parse_help(cda[CTA_HELP], &helpname); |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1278 | if (err < 0) |
| 1279 | goto err2; |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1280 | |
Patrick McHardy | 794e687 | 2010-02-03 13:41:29 +0100 | [diff] [blame] | 1281 | helper = __nf_conntrack_helper_find(helpname, nf_ct_l3num(ct), |
| 1282 | nf_ct_protonum(ct)); |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1283 | if (helper == NULL) { |
| 1284 | rcu_read_unlock(); |
| 1285 | #ifdef CONFIG_MODULES |
| 1286 | if (request_module("nfct-helper-%s", helpname) < 0) { |
| 1287 | err = -EOPNOTSUPP; |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1288 | goto err1; |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1289 | } |
| 1290 | |
| 1291 | rcu_read_lock(); |
Patrick McHardy | 794e687 | 2010-02-03 13:41:29 +0100 | [diff] [blame] | 1292 | helper = __nf_conntrack_helper_find(helpname, |
| 1293 | nf_ct_l3num(ct), |
| 1294 | nf_ct_protonum(ct)); |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1295 | if (helper) { |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1296 | err = -EAGAIN; |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1297 | goto err2; |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1298 | } |
| 1299 | rcu_read_unlock(); |
| 1300 | #endif |
| 1301 | err = -EOPNOTSUPP; |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1302 | goto err1; |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1303 | } else { |
| 1304 | struct nf_conn_help *help; |
| 1305 | |
| 1306 | help = nf_ct_helper_ext_add(ct, GFP_ATOMIC); |
| 1307 | if (help == NULL) { |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1308 | err = -ENOMEM; |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1309 | goto err2; |
Pablo Neira Ayuso | 226c0c0 | 2008-11-18 11:54:05 +0100 | [diff] [blame] | 1310 | } |
| 1311 | |
| 1312 | /* not in hash table yet so not strictly necessary */ |
| 1313 | rcu_assign_pointer(help->helper, helper); |
| 1314 | } |
| 1315 | } else { |
| 1316 | /* try an implicit helper assignation */ |
Patrick McHardy | b2a15a6 | 2010-02-03 14:13:03 +0100 | [diff] [blame] | 1317 | err = __nf_ct_try_assign_helper(ct, NULL, GFP_ATOMIC); |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1318 | if (err < 0) |
| 1319 | goto err2; |
Patrick McHarrdy | 3c158f7 | 2007-06-05 12:55:27 -0700 | [diff] [blame] | 1320 | } |
Yasuyuki Kozakai | dafc741 | 2006-11-27 10:25:32 -0800 | [diff] [blame] | 1321 | |
Pablo Neira Ayuso | a88e22a | 2010-02-19 14:24:39 +0100 | [diff] [blame] | 1322 | if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST]) { |
| 1323 | err = ctnetlink_change_nat(ct, cda); |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1324 | if (err < 0) |
| 1325 | goto err2; |
Pablo Neira Ayuso | 1575e7e | 2008-08-18 21:30:55 -0700 | [diff] [blame] | 1326 | } |
| 1327 | |
Pablo Neira Ayuso | a88e22a | 2010-02-19 14:24:39 +0100 | [diff] [blame] | 1328 | nf_ct_acct_ext_add(ct, GFP_ATOMIC); |
| 1329 | nf_ct_ecache_ext_add(ct, 0, 0, GFP_ATOMIC); |
| 1330 | /* we must add conntrack extensions before confirmation. */ |
| 1331 | ct->status |= IPS_CONFIRMED; |
| 1332 | |
| 1333 | if (cda[CTA_STATUS]) { |
| 1334 | err = ctnetlink_change_status(ct, cda); |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1335 | if (err < 0) |
| 1336 | goto err2; |
Pablo Neira Ayuso | e6a7d3c | 2008-10-14 11:58:31 -0700 | [diff] [blame] | 1337 | } |
| 1338 | |
Pablo Neira Ayuso | c969aa7 | 2009-02-09 14:33:57 -0800 | [diff] [blame] | 1339 | #ifdef CONFIG_NF_NAT_NEEDED |
| 1340 | if (cda[CTA_NAT_SEQ_ADJ_ORIG] || cda[CTA_NAT_SEQ_ADJ_REPLY]) { |
| 1341 | err = ctnetlink_change_nat_seq_adj(ct, cda); |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1342 | if (err < 0) |
| 1343 | goto err2; |
Pablo Neira Ayuso | c969aa7 | 2009-02-09 14:33:57 -0800 | [diff] [blame] | 1344 | } |
| 1345 | #endif |
| 1346 | |
Pablo Neira Ayuso | 1575e7e | 2008-08-18 21:30:55 -0700 | [diff] [blame] | 1347 | if (cda[CTA_PROTOINFO]) { |
| 1348 | err = ctnetlink_change_protoinfo(ct, cda); |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1349 | if (err < 0) |
| 1350 | goto err2; |
Pablo Neira Ayuso | 1575e7e | 2008-08-18 21:30:55 -0700 | [diff] [blame] | 1351 | } |
| 1352 | |
Pablo Neira Ayuso | 1575e7e | 2008-08-18 21:30:55 -0700 | [diff] [blame] | 1353 | #if defined(CONFIG_NF_CONNTRACK_MARK) |
| 1354 | if (cda[CTA_MARK]) |
| 1355 | ct->mark = ntohl(nla_get_be32(cda[CTA_MARK])); |
| 1356 | #endif |
| 1357 | |
Pablo Neira Ayuso | 5faa1f4 | 2007-09-28 14:43:53 -0700 | [diff] [blame] | 1358 | /* setup master conntrack: this is a confirmed expectation */ |
Pablo Neira Ayuso | 7ec4749 | 2009-03-16 15:25:46 +0100 | [diff] [blame] | 1359 | if (cda[CTA_TUPLE_MASTER]) { |
| 1360 | struct nf_conntrack_tuple master; |
| 1361 | struct nf_conntrack_tuple_hash *master_h; |
| 1362 | struct nf_conn *master_ct; |
| 1363 | |
| 1364 | err = ctnetlink_parse_tuple(cda, &master, CTA_TUPLE_MASTER, u3); |
| 1365 | if (err < 0) |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1366 | goto err2; |
Pablo Neira Ayuso | 7ec4749 | 2009-03-16 15:25:46 +0100 | [diff] [blame] | 1367 | |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 1368 | master_h = nf_conntrack_find_get(net, zone, &master); |
Pablo Neira Ayuso | 7ec4749 | 2009-03-16 15:25:46 +0100 | [diff] [blame] | 1369 | if (master_h == NULL) { |
| 1370 | err = -ENOENT; |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1371 | goto err2; |
Pablo Neira Ayuso | 7ec4749 | 2009-03-16 15:25:46 +0100 | [diff] [blame] | 1372 | } |
| 1373 | master_ct = nf_ct_tuplehash_to_ctrack(master_h); |
Pablo Neira Ayuso | f2a8900 | 2007-12-12 10:34:29 -0800 | [diff] [blame] | 1374 | __set_bit(IPS_EXPECTED_BIT, &ct->status); |
Pablo Neira Ayuso | 5faa1f4 | 2007-09-28 14:43:53 -0700 | [diff] [blame] | 1375 | ct->master = master_ct; |
Pablo Neira Ayuso | f2a8900 | 2007-12-12 10:34:29 -0800 | [diff] [blame] | 1376 | } |
Pablo Neira Ayuso | 5faa1f4 | 2007-09-28 14:43:53 -0700 | [diff] [blame] | 1377 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1378 | add_timer(&ct->timeout); |
| 1379 | nf_conntrack_hash_insert(ct); |
Patrick McHardy | 58a3c9b | 2008-01-31 04:36:54 -0800 | [diff] [blame] | 1380 | rcu_read_unlock(); |
Yasuyuki Kozakai | dafc741 | 2006-11-27 10:25:32 -0800 | [diff] [blame] | 1381 | |
Pablo Neira Ayuso | f0a3c08 | 2009-03-16 15:28:09 +0100 | [diff] [blame] | 1382 | return ct; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1383 | |
Patrick McHardy | 0f5b3e8 | 2009-03-18 17:36:40 +0100 | [diff] [blame] | 1384 | err2: |
| 1385 | rcu_read_unlock(); |
| 1386 | err1: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1387 | nf_conntrack_free(ct); |
Pablo Neira Ayuso | f0a3c08 | 2009-03-16 15:28:09 +0100 | [diff] [blame] | 1388 | return ERR_PTR(err); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1389 | } |
| 1390 | |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1391 | static int |
| 1392 | ctnetlink_new_conntrack(struct sock *ctnl, struct sk_buff *skb, |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 1393 | const struct nlmsghdr *nlh, |
| 1394 | const struct nlattr * const cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1395 | { |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 1396 | struct net *net = sock_net(ctnl); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1397 | struct nf_conntrack_tuple otuple, rtuple; |
| 1398 | struct nf_conntrack_tuple_hash *h = NULL; |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 1399 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1400 | u_int8_t u3 = nfmsg->nfgen_family; |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 1401 | u16 zone; |
| 1402 | int err; |
| 1403 | |
| 1404 | err = ctnetlink_parse_zone(cda[CTA_ZONE], &zone); |
| 1405 | if (err < 0) |
| 1406 | return err; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1407 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1408 | if (cda[CTA_TUPLE_ORIG]) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1409 | err = ctnetlink_parse_tuple(cda, &otuple, CTA_TUPLE_ORIG, u3); |
| 1410 | if (err < 0) |
| 1411 | return err; |
| 1412 | } |
| 1413 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1414 | if (cda[CTA_TUPLE_REPLY]) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1415 | err = ctnetlink_parse_tuple(cda, &rtuple, CTA_TUPLE_REPLY, u3); |
| 1416 | if (err < 0) |
| 1417 | return err; |
| 1418 | } |
| 1419 | |
Patrick McHardy | f8ba1af | 2008-01-31 04:38:58 -0800 | [diff] [blame] | 1420 | spin_lock_bh(&nf_conntrack_lock); |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1421 | if (cda[CTA_TUPLE_ORIG]) |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 1422 | h = __nf_conntrack_find(net, zone, &otuple); |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1423 | else if (cda[CTA_TUPLE_REPLY]) |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 1424 | h = __nf_conntrack_find(net, zone, &rtuple); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1425 | |
| 1426 | if (h == NULL) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1427 | err = -ENOENT; |
Pablo Neira Ayuso | f0a3c08 | 2009-03-16 15:28:09 +0100 | [diff] [blame] | 1428 | if (nlh->nlmsg_flags & NLM_F_CREATE) { |
| 1429 | struct nf_conn *ct; |
Pablo Neira Ayuso | fecc113 | 2009-05-05 17:48:26 +0200 | [diff] [blame] | 1430 | enum ip_conntrack_events events; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1431 | |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 1432 | ct = ctnetlink_create_conntrack(net, zone, cda, &otuple, |
Pablo Neira Ayuso | f0a3c08 | 2009-03-16 15:28:09 +0100 | [diff] [blame] | 1433 | &rtuple, u3); |
| 1434 | if (IS_ERR(ct)) { |
| 1435 | err = PTR_ERR(ct); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1436 | goto out_unlock; |
| 1437 | } |
Pablo Neira Ayuso | f0a3c08 | 2009-03-16 15:28:09 +0100 | [diff] [blame] | 1438 | err = 0; |
| 1439 | nf_conntrack_get(&ct->ct_general); |
| 1440 | spin_unlock_bh(&nf_conntrack_lock); |
Pablo Neira Ayuso | fecc113 | 2009-05-05 17:48:26 +0200 | [diff] [blame] | 1441 | if (test_bit(IPS_EXPECTED_BIT, &ct->status)) |
| 1442 | events = IPCT_RELATED; |
| 1443 | else |
| 1444 | events = IPCT_NEW; |
| 1445 | |
Patrick McHardy | 858b3133 | 2010-02-03 13:48:53 +0100 | [diff] [blame] | 1446 | nf_conntrack_eventmask_report((1 << IPCT_REPLY) | |
| 1447 | (1 << IPCT_ASSURED) | |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 1448 | (1 << IPCT_HELPER) | |
| 1449 | (1 << IPCT_PROTOINFO) | |
| 1450 | (1 << IPCT_NATSEQADJ) | |
| 1451 | (1 << IPCT_MARK) | events, |
| 1452 | ct, NETLINK_CB(skb).pid, |
| 1453 | nlmsg_report(nlh)); |
Pablo Neira Ayuso | f0a3c08 | 2009-03-16 15:28:09 +0100 | [diff] [blame] | 1454 | nf_ct_put(ct); |
| 1455 | } else |
| 1456 | spin_unlock_bh(&nf_conntrack_lock); |
Pablo Neira Ayuso | 5faa1f4 | 2007-09-28 14:43:53 -0700 | [diff] [blame] | 1457 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1458 | return err; |
| 1459 | } |
| 1460 | /* implicit 'else' */ |
| 1461 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1462 | /* We manipulate the conntrack inside the global conntrack table lock, |
| 1463 | * so there's no need to increase the refcount */ |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1464 | err = -EEXIST; |
Pablo Neira Ayuso | ff4ca82 | 2007-08-07 18:11:26 -0700 | [diff] [blame] | 1465 | if (!(nlh->nlmsg_flags & NLM_F_EXCL)) { |
Pablo Neira Ayuso | 19abb7b | 2008-11-18 11:56:20 +0100 | [diff] [blame] | 1466 | struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(h); |
| 1467 | |
Pablo Neira Ayuso | 19abb7b | 2008-11-18 11:56:20 +0100 | [diff] [blame] | 1468 | err = ctnetlink_change_conntrack(ct, cda); |
| 1469 | if (err == 0) { |
| 1470 | nf_conntrack_get(&ct->ct_general); |
| 1471 | spin_unlock_bh(&nf_conntrack_lock); |
Patrick McHardy | 858b3133 | 2010-02-03 13:48:53 +0100 | [diff] [blame] | 1472 | nf_conntrack_eventmask_report((1 << IPCT_REPLY) | |
| 1473 | (1 << IPCT_ASSURED) | |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 1474 | (1 << IPCT_HELPER) | |
| 1475 | (1 << IPCT_PROTOINFO) | |
| 1476 | (1 << IPCT_NATSEQADJ) | |
| 1477 | (1 << IPCT_MARK), |
| 1478 | ct, NETLINK_CB(skb).pid, |
| 1479 | nlmsg_report(nlh)); |
Pablo Neira Ayuso | 19abb7b | 2008-11-18 11:56:20 +0100 | [diff] [blame] | 1480 | nf_ct_put(ct); |
| 1481 | } else |
| 1482 | spin_unlock_bh(&nf_conntrack_lock); |
| 1483 | |
| 1484 | return err; |
Pablo Neira Ayuso | ff4ca82 | 2007-08-07 18:11:26 -0700 | [diff] [blame] | 1485 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1486 | |
| 1487 | out_unlock: |
Patrick McHardy | f8ba1af | 2008-01-31 04:38:58 -0800 | [diff] [blame] | 1488 | spin_unlock_bh(&nf_conntrack_lock); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1489 | return err; |
| 1490 | } |
| 1491 | |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1492 | /*********************************************************************** |
| 1493 | * EXPECT |
| 1494 | ***********************************************************************/ |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1495 | |
| 1496 | static inline int |
| 1497 | ctnetlink_exp_dump_tuple(struct sk_buff *skb, |
| 1498 | const struct nf_conntrack_tuple *tuple, |
| 1499 | enum ctattr_expect type) |
| 1500 | { |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1501 | struct nlattr *nest_parms; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1502 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1503 | nest_parms = nla_nest_start(skb, type | NLA_F_NESTED); |
| 1504 | if (!nest_parms) |
| 1505 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1506 | if (ctnetlink_dump_tuples(skb, tuple) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1507 | goto nla_put_failure; |
| 1508 | nla_nest_end(skb, nest_parms); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1509 | |
| 1510 | return 0; |
| 1511 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1512 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1513 | return -1; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1514 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1515 | |
| 1516 | static inline int |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 1517 | ctnetlink_exp_dump_mask(struct sk_buff *skb, |
| 1518 | const struct nf_conntrack_tuple *tuple, |
Patrick McHardy | d4156e8 | 2007-07-07 22:31:32 -0700 | [diff] [blame] | 1519 | const struct nf_conntrack_tuple_mask *mask) |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 1520 | { |
| 1521 | int ret; |
| 1522 | struct nf_conntrack_l3proto *l3proto; |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 1523 | struct nf_conntrack_l4proto *l4proto; |
Patrick McHardy | d4156e8 | 2007-07-07 22:31:32 -0700 | [diff] [blame] | 1524 | struct nf_conntrack_tuple m; |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1525 | struct nlattr *nest_parms; |
Patrick McHardy | d4156e8 | 2007-07-07 22:31:32 -0700 | [diff] [blame] | 1526 | |
| 1527 | memset(&m, 0xFF, sizeof(m)); |
Patrick McHardy | d4156e8 | 2007-07-07 22:31:32 -0700 | [diff] [blame] | 1528 | memcpy(&m.src.u3, &mask->src.u3, sizeof(m.src.u3)); |
Patrick McHardy | e578756 | 2010-01-26 17:04:02 +0100 | [diff] [blame] | 1529 | m.src.u.all = mask->src.u.all; |
| 1530 | m.dst.protonum = tuple->dst.protonum; |
Patrick McHardy | d4156e8 | 2007-07-07 22:31:32 -0700 | [diff] [blame] | 1531 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1532 | nest_parms = nla_nest_start(skb, CTA_EXPECT_MASK | NLA_F_NESTED); |
| 1533 | if (!nest_parms) |
| 1534 | goto nla_put_failure; |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 1535 | |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 1536 | l3proto = __nf_ct_l3proto_find(tuple->src.l3num); |
Patrick McHardy | d4156e8 | 2007-07-07 22:31:32 -0700 | [diff] [blame] | 1537 | ret = ctnetlink_dump_tuples_ip(skb, &m, l3proto); |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 1538 | |
| 1539 | if (unlikely(ret < 0)) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1540 | goto nla_put_failure; |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 1541 | |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 1542 | l4proto = __nf_ct_l4proto_find(tuple->src.l3num, tuple->dst.protonum); |
Patrick McHardy | d4156e8 | 2007-07-07 22:31:32 -0700 | [diff] [blame] | 1543 | ret = ctnetlink_dump_tuples_proto(skb, &m, l4proto); |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 1544 | if (unlikely(ret < 0)) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1545 | goto nla_put_failure; |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 1546 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1547 | nla_nest_end(skb, nest_parms); |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 1548 | |
| 1549 | return 0; |
| 1550 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1551 | nla_put_failure: |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 1552 | return -1; |
| 1553 | } |
| 1554 | |
Ilpo Järvinen | bb5cf80 | 2008-01-05 23:11:31 -0800 | [diff] [blame] | 1555 | static int |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1556 | ctnetlink_exp_dump_expect(struct sk_buff *skb, |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1557 | const struct nf_conntrack_expect *exp) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1558 | { |
| 1559 | struct nf_conn *master = exp->master; |
Patrick McHardy | d1e7a03 | 2010-02-11 12:22:28 +0100 | [diff] [blame] | 1560 | struct nf_conntrack_helper *helper; |
Patrick McHardy | d978e5d | 2007-12-17 22:37:03 -0800 | [diff] [blame] | 1561 | long timeout = (exp->timeout.expires - jiffies) / HZ; |
| 1562 | |
| 1563 | if (timeout < 0) |
| 1564 | timeout = 0; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1565 | |
| 1566 | if (ctnetlink_exp_dump_tuple(skb, &exp->tuple, CTA_EXPECT_TUPLE) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1567 | goto nla_put_failure; |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 1568 | if (ctnetlink_exp_dump_mask(skb, &exp->tuple, &exp->mask) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1569 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1570 | if (ctnetlink_exp_dump_tuple(skb, |
| 1571 | &master->tuplehash[IP_CT_DIR_ORIGINAL].tuple, |
| 1572 | CTA_EXPECT_MASTER) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1573 | goto nla_put_failure; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1574 | |
Patrick McHardy | d978e5d | 2007-12-17 22:37:03 -0800 | [diff] [blame] | 1575 | NLA_PUT_BE32(skb, CTA_EXPECT_TIMEOUT, htonl(timeout)); |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 1576 | NLA_PUT_BE32(skb, CTA_EXPECT_ID, htonl((unsigned long)exp)); |
Patrick McHardy | d1e7a03 | 2010-02-11 12:22:28 +0100 | [diff] [blame] | 1577 | helper = rcu_dereference(nfct_help(master)->helper); |
| 1578 | if (helper) |
| 1579 | NLA_PUT_STRING(skb, CTA_EXPECT_HELP_NAME, helper->name); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1580 | |
| 1581 | return 0; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1582 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1583 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1584 | return -1; |
| 1585 | } |
| 1586 | |
| 1587 | static int |
| 1588 | ctnetlink_exp_fill_info(struct sk_buff *skb, u32 pid, u32 seq, |
Pablo Neira Ayuso | 8b0a231 | 2009-06-02 20:03:34 +0200 | [diff] [blame] | 1589 | int event, const struct nf_conntrack_expect *exp) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1590 | { |
| 1591 | struct nlmsghdr *nlh; |
| 1592 | struct nfgenmsg *nfmsg; |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 1593 | unsigned int flags = pid ? NLM_F_MULTI : 0; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1594 | |
| 1595 | event |= NFNL_SUBSYS_CTNETLINK_EXP << 8; |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 1596 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*nfmsg), flags); |
| 1597 | if (nlh == NULL) |
| 1598 | goto nlmsg_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1599 | |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 1600 | nfmsg = nlmsg_data(nlh); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1601 | nfmsg->nfgen_family = exp->tuple.src.l3num; |
| 1602 | nfmsg->version = NFNETLINK_V0; |
| 1603 | nfmsg->res_id = 0; |
| 1604 | |
| 1605 | if (ctnetlink_exp_dump_expect(skb, exp) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1606 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1607 | |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 1608 | nlmsg_end(skb, nlh); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1609 | return skb->len; |
| 1610 | |
| 1611 | nlmsg_failure: |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1612 | nla_put_failure: |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 1613 | nlmsg_cancel(skb, nlh); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1614 | return -1; |
| 1615 | } |
| 1616 | |
| 1617 | #ifdef CONFIG_NF_CONNTRACK_EVENTS |
Pablo Neira Ayuso | e34d5c1 | 2009-06-03 10:32:06 +0200 | [diff] [blame] | 1618 | static int |
| 1619 | ctnetlink_expect_event(unsigned int events, struct nf_exp_event *item) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1620 | { |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 1621 | struct nf_conntrack_expect *exp = item->exp; |
| 1622 | struct net *net = nf_ct_exp_net(exp); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1623 | struct nlmsghdr *nlh; |
| 1624 | struct nfgenmsg *nfmsg; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1625 | struct sk_buff *skb; |
| 1626 | unsigned int type; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1627 | int flags = 0; |
| 1628 | |
Pablo Neira Ayuso | a0891aa | 2009-06-13 12:26:29 +0200 | [diff] [blame] | 1629 | if (events & (1 << IPEXP_NEW)) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1630 | type = IPCTNL_MSG_EXP_NEW; |
| 1631 | flags = NLM_F_CREATE|NLM_F_EXCL; |
| 1632 | } else |
Pablo Neira Ayuso | e34d5c1 | 2009-06-03 10:32:06 +0200 | [diff] [blame] | 1633 | return 0; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1634 | |
Pablo Neira Ayuso | 1f9da25 | 2009-02-09 14:34:26 -0800 | [diff] [blame] | 1635 | if (!item->report && |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 1636 | !nfnetlink_has_listeners(net, NFNLGRP_CONNTRACK_EXP_NEW)) |
Pablo Neira Ayuso | e34d5c1 | 2009-06-03 10:32:06 +0200 | [diff] [blame] | 1637 | return 0; |
Pablo Neira Ayuso | b3a27bf | 2006-08-22 00:32:05 -0700 | [diff] [blame] | 1638 | |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 1639 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
| 1640 | if (skb == NULL) |
Pablo Neira Ayuso | 150ace0 | 2009-04-17 17:47:31 +0200 | [diff] [blame] | 1641 | goto errout; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1642 | |
Marcus Sundberg | b633ad5 | 2006-02-04 02:11:09 -0800 | [diff] [blame] | 1643 | type |= NFNL_SUBSYS_CTNETLINK_EXP << 8; |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 1644 | nlh = nlmsg_put(skb, item->pid, 0, type, sizeof(*nfmsg), flags); |
| 1645 | if (nlh == NULL) |
| 1646 | goto nlmsg_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1647 | |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 1648 | nfmsg = nlmsg_data(nlh); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1649 | nfmsg->nfgen_family = exp->tuple.src.l3num; |
| 1650 | nfmsg->version = NFNETLINK_V0; |
| 1651 | nfmsg->res_id = 0; |
| 1652 | |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 1653 | rcu_read_lock(); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1654 | if (ctnetlink_exp_dump_expect(skb, exp) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1655 | goto nla_put_failure; |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 1656 | rcu_read_unlock(); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1657 | |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 1658 | nlmsg_end(skb, nlh); |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 1659 | nfnetlink_send(skb, net, item->pid, NFNLGRP_CONNTRACK_EXP_NEW, |
Pablo Neira Ayuso | e34d5c1 | 2009-06-03 10:32:06 +0200 | [diff] [blame] | 1660 | item->report, GFP_ATOMIC); |
| 1661 | return 0; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1662 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1663 | nla_put_failure: |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 1664 | rcu_read_unlock(); |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 1665 | nlmsg_cancel(skb, nlh); |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 1666 | nlmsg_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1667 | kfree_skb(skb); |
Pablo Neira Ayuso | 150ace0 | 2009-04-17 17:47:31 +0200 | [diff] [blame] | 1668 | errout: |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 1669 | nfnetlink_set_err(net, 0, 0, -ENOBUFS); |
Pablo Neira Ayuso | e34d5c1 | 2009-06-03 10:32:06 +0200 | [diff] [blame] | 1670 | return 0; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1671 | } |
| 1672 | #endif |
Patrick McHardy | cf6994c | 2007-07-07 22:32:34 -0700 | [diff] [blame] | 1673 | static int ctnetlink_exp_done(struct netlink_callback *cb) |
| 1674 | { |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 1675 | if (cb->args[1]) |
| 1676 | nf_ct_expect_put((struct nf_conntrack_expect *)cb->args[1]); |
Patrick McHardy | cf6994c | 2007-07-07 22:32:34 -0700 | [diff] [blame] | 1677 | return 0; |
| 1678 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1679 | |
| 1680 | static int |
| 1681 | ctnetlink_exp_dump_table(struct sk_buff *skb, struct netlink_callback *cb) |
| 1682 | { |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 1683 | struct net *net = sock_net(skb->sk); |
Patrick McHardy | cf6994c | 2007-07-07 22:32:34 -0700 | [diff] [blame] | 1684 | struct nf_conntrack_expect *exp, *last; |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 1685 | struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh); |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 1686 | struct hlist_node *n; |
Pablo Neira Ayuso | 87711cb | 2006-01-05 12:19:23 -0800 | [diff] [blame] | 1687 | u_int8_t l3proto = nfmsg->nfgen_family; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1688 | |
Patrick McHardy | 7d0742d | 2008-01-31 04:38:19 -0800 | [diff] [blame] | 1689 | rcu_read_lock(); |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 1690 | last = (struct nf_conntrack_expect *)cb->args[1]; |
| 1691 | for (; cb->args[0] < nf_ct_expect_hsize; cb->args[0]++) { |
Patrick McHardy | cf6994c | 2007-07-07 22:32:34 -0700 | [diff] [blame] | 1692 | restart: |
Alexey Dobriyan | 9b03f38 | 2008-10-08 11:35:03 +0200 | [diff] [blame] | 1693 | hlist_for_each_entry(exp, n, &net->ct.expect_hash[cb->args[0]], |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 1694 | hnode) { |
| 1695 | if (l3proto && exp->tuple.src.l3num != l3proto) |
Patrick McHardy | cf6994c | 2007-07-07 22:32:34 -0700 | [diff] [blame] | 1696 | continue; |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 1697 | if (cb->args[1]) { |
| 1698 | if (exp != last) |
| 1699 | continue; |
| 1700 | cb->args[1] = 0; |
| 1701 | } |
Pablo Neira Ayuso | 8b0a231 | 2009-06-02 20:03:34 +0200 | [diff] [blame] | 1702 | if (ctnetlink_exp_fill_info(skb, |
| 1703 | NETLINK_CB(cb->skb).pid, |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 1704 | cb->nlh->nlmsg_seq, |
| 1705 | IPCTNL_MSG_EXP_NEW, |
Pablo Neira Ayuso | 8b0a231 | 2009-06-02 20:03:34 +0200 | [diff] [blame] | 1706 | exp) < 0) { |
Patrick McHardy | 7d0742d | 2008-01-31 04:38:19 -0800 | [diff] [blame] | 1707 | if (!atomic_inc_not_zero(&exp->use)) |
| 1708 | continue; |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 1709 | cb->args[1] = (unsigned long)exp; |
| 1710 | goto out; |
| 1711 | } |
Patrick McHardy | cf6994c | 2007-07-07 22:32:34 -0700 | [diff] [blame] | 1712 | } |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 1713 | if (cb->args[1]) { |
| 1714 | cb->args[1] = 0; |
| 1715 | goto restart; |
Patrick McHardy | cf6994c | 2007-07-07 22:32:34 -0700 | [diff] [blame] | 1716 | } |
| 1717 | } |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1718 | out: |
Patrick McHardy | 7d0742d | 2008-01-31 04:38:19 -0800 | [diff] [blame] | 1719 | rcu_read_unlock(); |
Patrick McHardy | cf6994c | 2007-07-07 22:32:34 -0700 | [diff] [blame] | 1720 | if (last) |
| 1721 | nf_ct_expect_put(last); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1722 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1723 | return skb->len; |
| 1724 | } |
| 1725 | |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 1726 | static const struct nla_policy exp_nla_policy[CTA_EXPECT_MAX+1] = { |
Patrick McHardy | d0b0268 | 2010-02-10 15:38:33 +0100 | [diff] [blame] | 1727 | [CTA_EXPECT_MASTER] = { .type = NLA_NESTED }, |
| 1728 | [CTA_EXPECT_TUPLE] = { .type = NLA_NESTED }, |
| 1729 | [CTA_EXPECT_MASK] = { .type = NLA_NESTED }, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 1730 | [CTA_EXPECT_TIMEOUT] = { .type = NLA_U32 }, |
| 1731 | [CTA_EXPECT_ID] = { .type = NLA_U32 }, |
Patrick McHardy | d0b0268 | 2010-02-10 15:38:33 +0100 | [diff] [blame] | 1732 | [CTA_EXPECT_HELP_NAME] = { .type = NLA_NUL_STRING }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1733 | }; |
| 1734 | |
| 1735 | static int |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1736 | ctnetlink_get_expect(struct sock *ctnl, struct sk_buff *skb, |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 1737 | const struct nlmsghdr *nlh, |
| 1738 | const struct nlattr * const cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1739 | { |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 1740 | struct net *net = sock_net(ctnl); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1741 | struct nf_conntrack_tuple tuple; |
| 1742 | struct nf_conntrack_expect *exp; |
| 1743 | struct sk_buff *skb2; |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 1744 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1745 | u_int8_t u3 = nfmsg->nfgen_family; |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 1746 | u16 zone; |
| 1747 | int err; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1748 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1749 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
Thomas Graf | c702e80 | 2007-03-22 23:30:55 -0700 | [diff] [blame] | 1750 | return netlink_dump_start(ctnl, skb, nlh, |
| 1751 | ctnetlink_exp_dump_table, |
Patrick McHardy | cf6994c | 2007-07-07 22:32:34 -0700 | [diff] [blame] | 1752 | ctnetlink_exp_done); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1753 | } |
| 1754 | |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 1755 | err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone); |
| 1756 | if (err < 0) |
| 1757 | return err; |
| 1758 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1759 | if (cda[CTA_EXPECT_MASTER]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1760 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_MASTER, u3); |
| 1761 | else |
| 1762 | return -EINVAL; |
| 1763 | |
| 1764 | if (err < 0) |
| 1765 | return err; |
| 1766 | |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 1767 | exp = nf_ct_expect_find_get(net, zone, &tuple); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1768 | if (!exp) |
| 1769 | return -ENOENT; |
| 1770 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1771 | if (cda[CTA_EXPECT_ID]) { |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 1772 | __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]); |
Patrick McHardy | 3583240 | 2007-09-28 14:41:50 -0700 | [diff] [blame] | 1773 | if (ntohl(id) != (u32)(unsigned long)exp) { |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 1774 | nf_ct_expect_put(exp); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1775 | return -ENOENT; |
| 1776 | } |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1777 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1778 | |
| 1779 | err = -ENOMEM; |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 1780 | skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
| 1781 | if (skb2 == NULL) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1782 | goto out; |
Thomas Graf | 4e9b826 | 2006-11-27 09:25:58 -0800 | [diff] [blame] | 1783 | |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 1784 | rcu_read_lock(); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1785 | err = ctnetlink_exp_fill_info(skb2, NETLINK_CB(skb).pid, |
Pablo Neira Ayuso | 8b0a231 | 2009-06-02 20:03:34 +0200 | [diff] [blame] | 1786 | nlh->nlmsg_seq, IPCTNL_MSG_EXP_NEW, exp); |
Pablo Neira Ayuso | 528a3a6 | 2008-11-17 16:00:40 +0100 | [diff] [blame] | 1787 | rcu_read_unlock(); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1788 | if (err <= 0) |
| 1789 | goto free; |
| 1790 | |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 1791 | nf_ct_expect_put(exp); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1792 | |
| 1793 | return netlink_unicast(ctnl, skb2, NETLINK_CB(skb).pid, MSG_DONTWAIT); |
| 1794 | |
| 1795 | free: |
| 1796 | kfree_skb(skb2); |
| 1797 | out: |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 1798 | nf_ct_expect_put(exp); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1799 | return err; |
| 1800 | } |
| 1801 | |
| 1802 | static int |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1803 | ctnetlink_del_expect(struct sock *ctnl, struct sk_buff *skb, |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 1804 | const struct nlmsghdr *nlh, |
| 1805 | const struct nlattr * const cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1806 | { |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 1807 | struct net *net = sock_net(ctnl); |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 1808 | struct nf_conntrack_expect *exp; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1809 | struct nf_conntrack_tuple tuple; |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 1810 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 1811 | struct hlist_node *n, *next; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1812 | u_int8_t u3 = nfmsg->nfgen_family; |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 1813 | unsigned int i; |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 1814 | u16 zone; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1815 | int err; |
| 1816 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1817 | if (cda[CTA_EXPECT_TUPLE]) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1818 | /* delete a single expect by tuple */ |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 1819 | err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone); |
| 1820 | if (err < 0) |
| 1821 | return err; |
| 1822 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1823 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); |
| 1824 | if (err < 0) |
| 1825 | return err; |
| 1826 | |
| 1827 | /* bump usage count to 2 */ |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 1828 | exp = nf_ct_expect_find_get(net, zone, &tuple); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1829 | if (!exp) |
| 1830 | return -ENOENT; |
| 1831 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1832 | if (cda[CTA_EXPECT_ID]) { |
Patrick McHardy | 77236b6 | 2007-12-17 22:29:45 -0800 | [diff] [blame] | 1833 | __be32 id = nla_get_be32(cda[CTA_EXPECT_ID]); |
Patrick McHardy | 3583240 | 2007-09-28 14:41:50 -0700 | [diff] [blame] | 1834 | if (ntohl(id) != (u32)(unsigned long)exp) { |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 1835 | nf_ct_expect_put(exp); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1836 | return -ENOENT; |
| 1837 | } |
| 1838 | } |
| 1839 | |
| 1840 | /* after list removal, usage count == 1 */ |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 1841 | nf_ct_unexpect_related(exp); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1842 | /* have to put what we 'get' above. |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1843 | * after this line usage count == 0 */ |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 1844 | nf_ct_expect_put(exp); |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1845 | } else if (cda[CTA_EXPECT_HELP_NAME]) { |
| 1846 | char *name = nla_data(cda[CTA_EXPECT_HELP_NAME]); |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 1847 | struct nf_conn_help *m_help; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1848 | |
| 1849 | /* delete all expectations for this helper */ |
Patrick McHardy | f8ba1af | 2008-01-31 04:38:58 -0800 | [diff] [blame] | 1850 | spin_lock_bh(&nf_conntrack_lock); |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 1851 | for (i = 0; i < nf_ct_expect_hsize; i++) { |
| 1852 | hlist_for_each_entry_safe(exp, n, next, |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 1853 | &net->ct.expect_hash[i], |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 1854 | hnode) { |
| 1855 | m_help = nfct_help(exp->master); |
Patrick McHardy | 794e687 | 2010-02-03 13:41:29 +0100 | [diff] [blame] | 1856 | if (!strcmp(m_help->helper->name, name) && |
| 1857 | del_timer(&exp->timeout)) { |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 1858 | nf_ct_unlink_expect(exp); |
| 1859 | nf_ct_expect_put(exp); |
| 1860 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1861 | } |
| 1862 | } |
Patrick McHardy | f8ba1af | 2008-01-31 04:38:58 -0800 | [diff] [blame] | 1863 | spin_unlock_bh(&nf_conntrack_lock); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1864 | } else { |
| 1865 | /* This basically means we have to flush everything*/ |
Patrick McHardy | f8ba1af | 2008-01-31 04:38:58 -0800 | [diff] [blame] | 1866 | spin_lock_bh(&nf_conntrack_lock); |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 1867 | for (i = 0; i < nf_ct_expect_hsize; i++) { |
| 1868 | hlist_for_each_entry_safe(exp, n, next, |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 1869 | &net->ct.expect_hash[i], |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 1870 | hnode) { |
| 1871 | if (del_timer(&exp->timeout)) { |
| 1872 | nf_ct_unlink_expect(exp); |
| 1873 | nf_ct_expect_put(exp); |
| 1874 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1875 | } |
| 1876 | } |
Patrick McHardy | f8ba1af | 2008-01-31 04:38:58 -0800 | [diff] [blame] | 1877 | spin_unlock_bh(&nf_conntrack_lock); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1878 | } |
| 1879 | |
| 1880 | return 0; |
| 1881 | } |
| 1882 | static int |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 1883 | ctnetlink_change_expect(struct nf_conntrack_expect *x, |
| 1884 | const struct nlattr * const cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1885 | { |
| 1886 | return -EOPNOTSUPP; |
| 1887 | } |
| 1888 | |
| 1889 | static int |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 1890 | ctnetlink_create_expect(struct net *net, u16 zone, |
| 1891 | const struct nlattr * const cda[], |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 1892 | u_int8_t u3, |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 1893 | u32 pid, int report) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1894 | { |
| 1895 | struct nf_conntrack_tuple tuple, mask, master_tuple; |
| 1896 | struct nf_conntrack_tuple_hash *h = NULL; |
| 1897 | struct nf_conntrack_expect *exp; |
| 1898 | struct nf_conn *ct; |
Harald Welte | dc808fe | 2006-03-20 17:56:32 -0800 | [diff] [blame] | 1899 | struct nf_conn_help *help; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1900 | int err = 0; |
| 1901 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1902 | /* caller guarantees that those three CTA_EXPECT_* exist */ |
| 1903 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); |
| 1904 | if (err < 0) |
| 1905 | return err; |
| 1906 | err = ctnetlink_parse_tuple(cda, &mask, CTA_EXPECT_MASK, u3); |
| 1907 | if (err < 0) |
| 1908 | return err; |
| 1909 | err = ctnetlink_parse_tuple(cda, &master_tuple, CTA_EXPECT_MASTER, u3); |
| 1910 | if (err < 0) |
| 1911 | return err; |
| 1912 | |
| 1913 | /* Look for master conntrack of this expectation */ |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 1914 | h = nf_conntrack_find_get(net, zone, &master_tuple); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1915 | if (!h) |
| 1916 | return -ENOENT; |
| 1917 | ct = nf_ct_tuplehash_to_ctrack(h); |
Harald Welte | dc808fe | 2006-03-20 17:56:32 -0800 | [diff] [blame] | 1918 | help = nfct_help(ct); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1919 | |
Harald Welte | dc808fe | 2006-03-20 17:56:32 -0800 | [diff] [blame] | 1920 | if (!help || !help->helper) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1921 | /* such conntrack hasn't got any helper, abort */ |
Pablo Neira Ayuso | bfe2967 | 2008-11-17 15:55:48 +0100 | [diff] [blame] | 1922 | err = -EOPNOTSUPP; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1923 | goto out; |
| 1924 | } |
| 1925 | |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 1926 | exp = nf_ct_expect_alloc(ct); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1927 | if (!exp) { |
| 1928 | err = -ENOMEM; |
| 1929 | goto out; |
| 1930 | } |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1931 | |
Pablo Neira Ayuso | 626ba8f | 2009-03-16 15:50:51 +0100 | [diff] [blame] | 1932 | exp->class = 0; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1933 | exp->expectfn = NULL; |
| 1934 | exp->flags = 0; |
| 1935 | exp->master = ct; |
Patrick McHardy | 9457d85 | 2006-12-02 22:05:25 -0800 | [diff] [blame] | 1936 | exp->helper = NULL; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1937 | memcpy(&exp->tuple, &tuple, sizeof(struct nf_conntrack_tuple)); |
Patrick McHardy | d4156e8 | 2007-07-07 22:31:32 -0700 | [diff] [blame] | 1938 | memcpy(&exp->mask.src.u3, &mask.src.u3, sizeof(exp->mask.src.u3)); |
| 1939 | exp->mask.src.u.all = mask.src.u.all; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1940 | |
Pablo Neira Ayuso | 19abb7b | 2008-11-18 11:56:20 +0100 | [diff] [blame] | 1941 | err = nf_ct_expect_related_report(exp, pid, report); |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 1942 | nf_ct_expect_put(exp); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1943 | |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1944 | out: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1945 | nf_ct_put(nf_ct_tuplehash_to_ctrack(h)); |
| 1946 | return err; |
| 1947 | } |
| 1948 | |
| 1949 | static int |
| 1950 | ctnetlink_new_expect(struct sock *ctnl, struct sk_buff *skb, |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 1951 | const struct nlmsghdr *nlh, |
| 1952 | const struct nlattr * const cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1953 | { |
Alexey Dobriyan | 9592a5c | 2010-01-13 16:04:18 +0100 | [diff] [blame] | 1954 | struct net *net = sock_net(ctnl); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1955 | struct nf_conntrack_tuple tuple; |
| 1956 | struct nf_conntrack_expect *exp; |
Pablo Neira Ayuso | 96bcf93 | 2009-06-02 20:07:39 +0200 | [diff] [blame] | 1957 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1958 | u_int8_t u3 = nfmsg->nfgen_family; |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 1959 | u16 zone; |
| 1960 | int err; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1961 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1962 | if (!cda[CTA_EXPECT_TUPLE] |
| 1963 | || !cda[CTA_EXPECT_MASK] |
| 1964 | || !cda[CTA_EXPECT_MASTER]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1965 | return -EINVAL; |
| 1966 | |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 1967 | err = ctnetlink_parse_zone(cda[CTA_EXPECT_ZONE], &zone); |
| 1968 | if (err < 0) |
| 1969 | return err; |
| 1970 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1971 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); |
| 1972 | if (err < 0) |
| 1973 | return err; |
| 1974 | |
Patrick McHardy | f8ba1af | 2008-01-31 04:38:58 -0800 | [diff] [blame] | 1975 | spin_lock_bh(&nf_conntrack_lock); |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 1976 | exp = __nf_ct_expect_find(net, zone, &tuple); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1977 | |
| 1978 | if (!exp) { |
Patrick McHardy | f8ba1af | 2008-01-31 04:38:58 -0800 | [diff] [blame] | 1979 | spin_unlock_bh(&nf_conntrack_lock); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1980 | err = -ENOENT; |
Pablo Neira Ayuso | 19abb7b | 2008-11-18 11:56:20 +0100 | [diff] [blame] | 1981 | if (nlh->nlmsg_flags & NLM_F_CREATE) { |
Patrick McHardy | ef00f89 | 2010-02-15 18:14:57 +0100 | [diff] [blame] | 1982 | err = ctnetlink_create_expect(net, zone, cda, |
Pablo Neira Ayuso | 19abb7b | 2008-11-18 11:56:20 +0100 | [diff] [blame] | 1983 | u3, |
| 1984 | NETLINK_CB(skb).pid, |
| 1985 | nlmsg_report(nlh)); |
| 1986 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1987 | return err; |
| 1988 | } |
| 1989 | |
| 1990 | err = -EEXIST; |
| 1991 | if (!(nlh->nlmsg_flags & NLM_F_EXCL)) |
| 1992 | err = ctnetlink_change_expect(exp, cda); |
Patrick McHardy | f8ba1af | 2008-01-31 04:38:58 -0800 | [diff] [blame] | 1993 | spin_unlock_bh(&nf_conntrack_lock); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1994 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1995 | return err; |
| 1996 | } |
| 1997 | |
| 1998 | #ifdef CONFIG_NF_CONNTRACK_EVENTS |
Pablo Neira Ayuso | e34d5c1 | 2009-06-03 10:32:06 +0200 | [diff] [blame] | 1999 | static struct nf_ct_event_notifier ctnl_notifier = { |
| 2000 | .fcn = ctnetlink_conntrack_event, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2001 | }; |
| 2002 | |
Pablo Neira Ayuso | e34d5c1 | 2009-06-03 10:32:06 +0200 | [diff] [blame] | 2003 | static struct nf_exp_event_notifier ctnl_notifier_exp = { |
| 2004 | .fcn = ctnetlink_expect_event, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2005 | }; |
| 2006 | #endif |
| 2007 | |
Patrick McHardy | 7c8d4cb | 2007-09-28 14:15:45 -0700 | [diff] [blame] | 2008 | static const struct nfnl_callback ctnl_cb[IPCTNL_MSG_MAX] = { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2009 | [IPCTNL_MSG_CT_NEW] = { .call = ctnetlink_new_conntrack, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 2010 | .attr_count = CTA_MAX, |
| 2011 | .policy = ct_nla_policy }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2012 | [IPCTNL_MSG_CT_GET] = { .call = ctnetlink_get_conntrack, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 2013 | .attr_count = CTA_MAX, |
| 2014 | .policy = ct_nla_policy }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2015 | [IPCTNL_MSG_CT_DELETE] = { .call = ctnetlink_del_conntrack, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 2016 | .attr_count = CTA_MAX, |
| 2017 | .policy = ct_nla_policy }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2018 | [IPCTNL_MSG_CT_GET_CTRZERO] = { .call = ctnetlink_get_conntrack, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 2019 | .attr_count = CTA_MAX, |
| 2020 | .policy = ct_nla_policy }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2021 | }; |
| 2022 | |
Patrick McHardy | 7c8d4cb | 2007-09-28 14:15:45 -0700 | [diff] [blame] | 2023 | 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] | 2024 | [IPCTNL_MSG_EXP_GET] = { .call = ctnetlink_get_expect, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 2025 | .attr_count = CTA_EXPECT_MAX, |
| 2026 | .policy = exp_nla_policy }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2027 | [IPCTNL_MSG_EXP_NEW] = { .call = ctnetlink_new_expect, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 2028 | .attr_count = CTA_EXPECT_MAX, |
| 2029 | .policy = exp_nla_policy }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2030 | [IPCTNL_MSG_EXP_DELETE] = { .call = ctnetlink_del_expect, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 2031 | .attr_count = CTA_EXPECT_MAX, |
| 2032 | .policy = exp_nla_policy }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2033 | }; |
| 2034 | |
Patrick McHardy | 7c8d4cb | 2007-09-28 14:15:45 -0700 | [diff] [blame] | 2035 | static const struct nfnetlink_subsystem ctnl_subsys = { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2036 | .name = "conntrack", |
| 2037 | .subsys_id = NFNL_SUBSYS_CTNETLINK, |
| 2038 | .cb_count = IPCTNL_MSG_MAX, |
| 2039 | .cb = ctnl_cb, |
| 2040 | }; |
| 2041 | |
Patrick McHardy | 7c8d4cb | 2007-09-28 14:15:45 -0700 | [diff] [blame] | 2042 | static const struct nfnetlink_subsystem ctnl_exp_subsys = { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2043 | .name = "conntrack_expect", |
| 2044 | .subsys_id = NFNL_SUBSYS_CTNETLINK_EXP, |
| 2045 | .cb_count = IPCTNL_MSG_EXP_MAX, |
| 2046 | .cb = ctnl_exp_cb, |
| 2047 | }; |
| 2048 | |
Patrick McHardy | d2483dd | 2006-12-02 22:06:05 -0800 | [diff] [blame] | 2049 | MODULE_ALIAS("ip_conntrack_netlink"); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2050 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK); |
Pablo Neira Ayuso | 34f9a2e | 2006-02-04 02:11:41 -0800 | [diff] [blame] | 2051 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK_EXP); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2052 | |
| 2053 | static int __init ctnetlink_init(void) |
| 2054 | { |
| 2055 | int ret; |
| 2056 | |
| 2057 | printk("ctnetlink v%s: registering with nfnetlink.\n", version); |
| 2058 | ret = nfnetlink_subsys_register(&ctnl_subsys); |
| 2059 | if (ret < 0) { |
| 2060 | printk("ctnetlink_init: cannot register with nfnetlink.\n"); |
| 2061 | goto err_out; |
| 2062 | } |
| 2063 | |
| 2064 | ret = nfnetlink_subsys_register(&ctnl_exp_subsys); |
| 2065 | if (ret < 0) { |
| 2066 | printk("ctnetlink_init: cannot register exp with nfnetlink.\n"); |
| 2067 | goto err_unreg_subsys; |
| 2068 | } |
| 2069 | |
| 2070 | #ifdef CONFIG_NF_CONNTRACK_EVENTS |
| 2071 | ret = nf_conntrack_register_notifier(&ctnl_notifier); |
| 2072 | if (ret < 0) { |
| 2073 | printk("ctnetlink_init: cannot register notifier.\n"); |
| 2074 | goto err_unreg_exp_subsys; |
| 2075 | } |
| 2076 | |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 2077 | ret = nf_ct_expect_register_notifier(&ctnl_notifier_exp); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2078 | if (ret < 0) { |
| 2079 | printk("ctnetlink_init: cannot expect register notifier.\n"); |
| 2080 | goto err_unreg_notifier; |
| 2081 | } |
| 2082 | #endif |
| 2083 | |
| 2084 | return 0; |
| 2085 | |
| 2086 | #ifdef CONFIG_NF_CONNTRACK_EVENTS |
| 2087 | err_unreg_notifier: |
| 2088 | nf_conntrack_unregister_notifier(&ctnl_notifier); |
| 2089 | err_unreg_exp_subsys: |
| 2090 | nfnetlink_subsys_unregister(&ctnl_exp_subsys); |
| 2091 | #endif |
| 2092 | err_unreg_subsys: |
| 2093 | nfnetlink_subsys_unregister(&ctnl_subsys); |
| 2094 | err_out: |
| 2095 | return ret; |
| 2096 | } |
| 2097 | |
| 2098 | static void __exit ctnetlink_exit(void) |
| 2099 | { |
| 2100 | printk("ctnetlink: unregistering from nfnetlink.\n"); |
| 2101 | |
| 2102 | #ifdef CONFIG_NF_CONNTRACK_EVENTS |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 2103 | nf_ct_expect_unregister_notifier(&ctnl_notifier_exp); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 2104 | nf_conntrack_unregister_notifier(&ctnl_notifier); |
| 2105 | #endif |
| 2106 | |
| 2107 | nfnetlink_subsys_unregister(&ctnl_exp_subsys); |
| 2108 | nfnetlink_subsys_unregister(&ctnl_subsys); |
| 2109 | return; |
| 2110 | } |
| 2111 | |
| 2112 | module_init(ctnetlink_init); |
| 2113 | module_exit(ctnetlink_exit); |