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 | 5faa1f4 | 2007-09-28 14:43:53 -0700 | [diff] [blame] | 7 | * (C) 2005-2007 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> |
| 21 | #include <linux/types.h> |
| 22 | #include <linux/timer.h> |
| 23 | #include <linux/skbuff.h> |
| 24 | #include <linux/errno.h> |
| 25 | #include <linux/netlink.h> |
| 26 | #include <linux/spinlock.h> |
Yasuyuki Kozakai | 40a839f | 2006-06-27 03:00:35 -0700 | [diff] [blame] | 27 | #include <linux/interrupt.h> |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 28 | #include <linux/notifier.h> |
| 29 | |
| 30 | #include <linux/netfilter.h> |
Arnaldo Carvalho de Melo | dc5fc57 | 2007-03-25 23:06:12 -0700 | [diff] [blame] | 31 | #include <net/netlink.h> |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 32 | #include <net/netfilter/nf_conntrack.h> |
| 33 | #include <net/netfilter/nf_conntrack_core.h> |
Martin Josefsson | 77ab9cf | 2006-11-29 02:34:58 +0100 | [diff] [blame] | 34 | #include <net/netfilter/nf_conntrack_expect.h> |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 35 | #include <net/netfilter/nf_conntrack_helper.h> |
| 36 | #include <net/netfilter/nf_conntrack_l3proto.h> |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 37 | #include <net/netfilter/nf_conntrack_l4proto.h> |
Jozsef Kadlecsik | 5b1158e | 2006-12-02 22:07:13 -0800 | [diff] [blame] | 38 | #include <net/netfilter/nf_conntrack_tuple.h> |
| 39 | #ifdef CONFIG_NF_NAT_NEEDED |
| 40 | #include <net/netfilter/nf_nat_core.h> |
| 41 | #include <net/netfilter/nf_nat_protocol.h> |
| 42 | #endif |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 43 | |
| 44 | #include <linux/netfilter/nfnetlink.h> |
| 45 | #include <linux/netfilter/nfnetlink_conntrack.h> |
| 46 | |
| 47 | MODULE_LICENSE("GPL"); |
| 48 | |
Harald Welte | dc808fe | 2006-03-20 17:56:32 -0800 | [diff] [blame] | 49 | static char __initdata version[] = "0.93"; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 50 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 51 | static inline int |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 52 | ctnetlink_dump_tuples_proto(struct sk_buff *skb, |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 53 | const struct nf_conntrack_tuple *tuple, |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 54 | struct nf_conntrack_l4proto *l4proto) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 55 | { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 56 | int ret = 0; |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 57 | struct nlattr *nest_parms; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 58 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 59 | nest_parms = nla_nest_start(skb, CTA_TUPLE_PROTO | NLA_F_NESTED); |
| 60 | if (!nest_parms) |
| 61 | goto nla_put_failure; |
| 62 | NLA_PUT(skb, CTA_PROTO_NUM, sizeof(u_int8_t), &tuple->dst.protonum); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 63 | |
Patrick McHardy | fdf7083 | 2007-09-28 14:37:41 -0700 | [diff] [blame] | 64 | if (likely(l4proto->tuple_to_nlattr)) |
| 65 | ret = l4proto->tuple_to_nlattr(skb, tuple); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 66 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 67 | nla_nest_end(skb, nest_parms); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 68 | |
| 69 | return ret; |
| 70 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 71 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 72 | return -1; |
| 73 | } |
| 74 | |
| 75 | static inline int |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 76 | ctnetlink_dump_tuples_ip(struct sk_buff *skb, |
| 77 | const struct nf_conntrack_tuple *tuple, |
| 78 | struct nf_conntrack_l3proto *l3proto) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 79 | { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 80 | int ret = 0; |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 81 | struct nlattr *nest_parms; |
| 82 | |
| 83 | nest_parms = nla_nest_start(skb, CTA_TUPLE_IP | NLA_F_NESTED); |
| 84 | if (!nest_parms) |
| 85 | goto nla_put_failure; |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 86 | |
Patrick McHardy | fdf7083 | 2007-09-28 14:37:41 -0700 | [diff] [blame] | 87 | if (likely(l3proto->tuple_to_nlattr)) |
| 88 | ret = l3proto->tuple_to_nlattr(skb, tuple); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 89 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 90 | nla_nest_end(skb, nest_parms); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 91 | |
| 92 | return ret; |
| 93 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 94 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 95 | return -1; |
| 96 | } |
| 97 | |
| 98 | static inline int |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 99 | ctnetlink_dump_tuples(struct sk_buff *skb, |
| 100 | const struct nf_conntrack_tuple *tuple) |
| 101 | { |
| 102 | int ret; |
| 103 | struct nf_conntrack_l3proto *l3proto; |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 104 | struct nf_conntrack_l4proto *l4proto; |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 105 | |
| 106 | l3proto = nf_ct_l3proto_find_get(tuple->src.l3num); |
| 107 | ret = ctnetlink_dump_tuples_ip(skb, tuple, l3proto); |
| 108 | nf_ct_l3proto_put(l3proto); |
| 109 | |
| 110 | if (unlikely(ret < 0)) |
| 111 | return ret; |
| 112 | |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 113 | l4proto = nf_ct_l4proto_find_get(tuple->src.l3num, tuple->dst.protonum); |
| 114 | ret = ctnetlink_dump_tuples_proto(skb, tuple, l4proto); |
| 115 | nf_ct_l4proto_put(l4proto); |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 116 | |
| 117 | return ret; |
| 118 | } |
| 119 | |
| 120 | static inline int |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 121 | ctnetlink_dump_status(struct sk_buff *skb, const struct nf_conn *ct) |
| 122 | { |
Patrick McHardy | bff9a89 | 2006-12-02 22:05:08 -0800 | [diff] [blame] | 123 | __be32 status = htonl((u_int32_t) ct->status); |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 124 | NLA_PUT(skb, CTA_STATUS, sizeof(status), &status); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 125 | return 0; |
| 126 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 127 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 128 | return -1; |
| 129 | } |
| 130 | |
| 131 | static inline int |
| 132 | ctnetlink_dump_timeout(struct sk_buff *skb, const struct nf_conn *ct) |
| 133 | { |
| 134 | long timeout_l = ct->timeout.expires - jiffies; |
Patrick McHardy | bff9a89 | 2006-12-02 22:05:08 -0800 | [diff] [blame] | 135 | __be32 timeout; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 136 | |
| 137 | if (timeout_l < 0) |
| 138 | timeout = 0; |
| 139 | else |
| 140 | timeout = htonl(timeout_l / HZ); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 141 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 142 | NLA_PUT(skb, CTA_TIMEOUT, sizeof(timeout), &timeout); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 143 | return 0; |
| 144 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 145 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 146 | return -1; |
| 147 | } |
| 148 | |
| 149 | static inline int |
| 150 | ctnetlink_dump_protoinfo(struct sk_buff *skb, const struct nf_conn *ct) |
| 151 | { |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 152 | struct nf_conntrack_l4proto *l4proto = nf_ct_l4proto_find_get(ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.l3num, ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.protonum); |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 153 | struct nlattr *nest_proto; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 154 | int ret; |
| 155 | |
Patrick McHardy | fdf7083 | 2007-09-28 14:37:41 -0700 | [diff] [blame] | 156 | if (!l4proto->to_nlattr) { |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 157 | nf_ct_l4proto_put(l4proto); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 158 | return 0; |
| 159 | } |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 160 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 161 | nest_proto = nla_nest_start(skb, CTA_PROTOINFO | NLA_F_NESTED); |
| 162 | if (!nest_proto) |
| 163 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 164 | |
Patrick McHardy | fdf7083 | 2007-09-28 14:37:41 -0700 | [diff] [blame] | 165 | ret = l4proto->to_nlattr(skb, nest_proto, ct); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 166 | |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 167 | nf_ct_l4proto_put(l4proto); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 168 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 169 | nla_nest_end(skb, nest_proto); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 170 | |
| 171 | return ret; |
| 172 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 173 | nla_put_failure: |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 174 | nf_ct_l4proto_put(l4proto); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 175 | return -1; |
| 176 | } |
| 177 | |
| 178 | static inline int |
| 179 | ctnetlink_dump_helpinfo(struct sk_buff *skb, const struct nf_conn *ct) |
| 180 | { |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 181 | struct nlattr *nest_helper; |
Harald Welte | dc808fe | 2006-03-20 17:56:32 -0800 | [diff] [blame] | 182 | const struct nf_conn_help *help = nfct_help(ct); |
Patrick McHarrdy | 3c158f7 | 2007-06-05 12:55:27 -0700 | [diff] [blame] | 183 | struct nf_conntrack_helper *helper; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 184 | |
Patrick McHarrdy | 3c158f7 | 2007-06-05 12:55:27 -0700 | [diff] [blame] | 185 | if (!help) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 186 | return 0; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 187 | |
Patrick McHarrdy | 3c158f7 | 2007-06-05 12:55:27 -0700 | [diff] [blame] | 188 | rcu_read_lock(); |
| 189 | helper = rcu_dereference(help->helper); |
| 190 | if (!helper) |
| 191 | goto out; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 192 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 193 | nest_helper = nla_nest_start(skb, CTA_HELP | NLA_F_NESTED); |
| 194 | if (!nest_helper) |
| 195 | goto nla_put_failure; |
| 196 | NLA_PUT(skb, CTA_HELP_NAME, strlen(helper->name), helper->name); |
Patrick McHarrdy | 3c158f7 | 2007-06-05 12:55:27 -0700 | [diff] [blame] | 197 | |
Patrick McHardy | fdf7083 | 2007-09-28 14:37:41 -0700 | [diff] [blame] | 198 | if (helper->to_nlattr) |
| 199 | helper->to_nlattr(skb, ct); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 200 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 201 | nla_nest_end(skb, nest_helper); |
Patrick McHarrdy | 3c158f7 | 2007-06-05 12:55:27 -0700 | [diff] [blame] | 202 | out: |
| 203 | rcu_read_unlock(); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 204 | return 0; |
| 205 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 206 | nla_put_failure: |
Patrick McHarrdy | 3c158f7 | 2007-06-05 12:55:27 -0700 | [diff] [blame] | 207 | rcu_read_unlock(); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 208 | return -1; |
| 209 | } |
| 210 | |
| 211 | #ifdef CONFIG_NF_CT_ACCT |
| 212 | static inline int |
| 213 | ctnetlink_dump_counters(struct sk_buff *skb, const struct nf_conn *ct, |
| 214 | enum ip_conntrack_dir dir) |
| 215 | { |
| 216 | enum ctattr_type type = dir ? CTA_COUNTERS_REPLY: CTA_COUNTERS_ORIG; |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 217 | struct nlattr *nest_count; |
Patrick McHardy | bff9a89 | 2006-12-02 22:05:08 -0800 | [diff] [blame] | 218 | __be32 tmp; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 219 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 220 | nest_count = nla_nest_start(skb, type | NLA_F_NESTED); |
| 221 | if (!nest_count) |
| 222 | goto nla_put_failure; |
| 223 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 224 | tmp = htonl(ct->counters[dir].packets); |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 225 | NLA_PUT(skb, CTA_COUNTERS32_PACKETS, sizeof(u_int32_t), &tmp); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 226 | |
| 227 | tmp = htonl(ct->counters[dir].bytes); |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 228 | NLA_PUT(skb, CTA_COUNTERS32_BYTES, sizeof(u_int32_t), &tmp); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 229 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 230 | nla_nest_end(skb, nest_count); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 231 | |
| 232 | return 0; |
| 233 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 234 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 235 | return -1; |
| 236 | } |
| 237 | #else |
| 238 | #define ctnetlink_dump_counters(a, b, c) (0) |
| 239 | #endif |
| 240 | |
| 241 | #ifdef CONFIG_NF_CONNTRACK_MARK |
| 242 | static inline int |
| 243 | ctnetlink_dump_mark(struct sk_buff *skb, const struct nf_conn *ct) |
| 244 | { |
Patrick McHardy | bff9a89 | 2006-12-02 22:05:08 -0800 | [diff] [blame] | 245 | __be32 mark = htonl(ct->mark); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 246 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 247 | NLA_PUT(skb, CTA_MARK, sizeof(u_int32_t), &mark); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 248 | return 0; |
| 249 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 250 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 251 | return -1; |
| 252 | } |
| 253 | #else |
| 254 | #define ctnetlink_dump_mark(a, b) (0) |
| 255 | #endif |
| 256 | |
| 257 | static inline int |
| 258 | ctnetlink_dump_id(struct sk_buff *skb, const struct nf_conn *ct) |
| 259 | { |
Patrick McHardy | 7f85f91 | 2007-09-28 14:41:27 -0700 | [diff] [blame] | 260 | __be32 id = htonl((unsigned long)ct); |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 261 | NLA_PUT(skb, CTA_ID, sizeof(u_int32_t), &id); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 262 | return 0; |
| 263 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 264 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 265 | return -1; |
| 266 | } |
| 267 | |
| 268 | static inline int |
| 269 | ctnetlink_dump_use(struct sk_buff *skb, const struct nf_conn *ct) |
| 270 | { |
Patrick McHardy | bff9a89 | 2006-12-02 22:05:08 -0800 | [diff] [blame] | 271 | __be32 use = htonl(atomic_read(&ct->ct_general.use)); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 272 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 273 | NLA_PUT(skb, CTA_USE, sizeof(u_int32_t), &use); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 274 | return 0; |
| 275 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 276 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 277 | return -1; |
| 278 | } |
| 279 | |
| 280 | #define tuple(ct, dir) (&(ct)->tuplehash[dir].tuple) |
| 281 | |
| 282 | static int |
| 283 | ctnetlink_fill_info(struct sk_buff *skb, u32 pid, u32 seq, |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 284 | int event, int nowait, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 285 | const struct nf_conn *ct) |
| 286 | { |
| 287 | struct nlmsghdr *nlh; |
| 288 | struct nfgenmsg *nfmsg; |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 289 | struct nlattr *nest_parms; |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 290 | unsigned char *b = skb_tail_pointer(skb); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 291 | |
| 292 | event |= NFNL_SUBSYS_CTNETLINK << 8; |
| 293 | nlh = NLMSG_PUT(skb, pid, seq, event, sizeof(struct nfgenmsg)); |
| 294 | nfmsg = NLMSG_DATA(nlh); |
| 295 | |
| 296 | nlh->nlmsg_flags = (nowait && pid) ? NLM_F_MULTI : 0; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 297 | nfmsg->nfgen_family = |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 298 | ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.l3num; |
| 299 | nfmsg->version = NFNETLINK_V0; |
| 300 | nfmsg->res_id = 0; |
| 301 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 302 | nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED); |
| 303 | if (!nest_parms) |
| 304 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 305 | if (ctnetlink_dump_tuples(skb, tuple(ct, IP_CT_DIR_ORIGINAL)) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 306 | goto nla_put_failure; |
| 307 | nla_nest_end(skb, nest_parms); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 308 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 309 | nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED); |
| 310 | if (!nest_parms) |
| 311 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 312 | if (ctnetlink_dump_tuples(skb, tuple(ct, IP_CT_DIR_REPLY)) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 313 | goto nla_put_failure; |
| 314 | nla_nest_end(skb, nest_parms); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 315 | |
| 316 | if (ctnetlink_dump_status(skb, ct) < 0 || |
| 317 | ctnetlink_dump_timeout(skb, ct) < 0 || |
| 318 | ctnetlink_dump_counters(skb, ct, IP_CT_DIR_ORIGINAL) < 0 || |
| 319 | ctnetlink_dump_counters(skb, ct, IP_CT_DIR_REPLY) < 0 || |
| 320 | ctnetlink_dump_protoinfo(skb, ct) < 0 || |
| 321 | ctnetlink_dump_helpinfo(skb, ct) < 0 || |
| 322 | ctnetlink_dump_mark(skb, ct) < 0 || |
| 323 | ctnetlink_dump_id(skb, ct) < 0 || |
| 324 | ctnetlink_dump_use(skb, ct) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 325 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 326 | |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 327 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 328 | return skb->len; |
| 329 | |
| 330 | nlmsg_failure: |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 331 | nla_put_failure: |
Arnaldo Carvalho de Melo | dc5fc57 | 2007-03-25 23:06:12 -0700 | [diff] [blame] | 332 | nlmsg_trim(skb, b); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 333 | return -1; |
| 334 | } |
| 335 | |
| 336 | #ifdef CONFIG_NF_CONNTRACK_EVENTS |
| 337 | static int ctnetlink_conntrack_event(struct notifier_block *this, |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 338 | unsigned long events, void *ptr) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 339 | { |
| 340 | struct nlmsghdr *nlh; |
| 341 | struct nfgenmsg *nfmsg; |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 342 | struct nlattr *nest_parms; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 343 | struct nf_conn *ct = (struct nf_conn *)ptr; |
| 344 | struct sk_buff *skb; |
| 345 | unsigned int type; |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 346 | sk_buff_data_t b; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 347 | unsigned int flags = 0, group; |
| 348 | |
| 349 | /* ignore our fake conntrack entry */ |
| 350 | if (ct == &nf_conntrack_untracked) |
| 351 | return NOTIFY_DONE; |
| 352 | |
| 353 | if (events & IPCT_DESTROY) { |
| 354 | type = IPCTNL_MSG_CT_DELETE; |
| 355 | group = NFNLGRP_CONNTRACK_DESTROY; |
| 356 | } else if (events & (IPCT_NEW | IPCT_RELATED)) { |
| 357 | type = IPCTNL_MSG_CT_NEW; |
| 358 | flags = NLM_F_CREATE|NLM_F_EXCL; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 359 | group = NFNLGRP_CONNTRACK_NEW; |
Pablo Neira Ayuso | 1a31526 | 2006-08-22 00:32:23 -0700 | [diff] [blame] | 360 | } else if (events & (IPCT_STATUS | IPCT_PROTOINFO)) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 361 | type = IPCTNL_MSG_CT_NEW; |
| 362 | group = NFNLGRP_CONNTRACK_UPDATE; |
| 363 | } else |
| 364 | return NOTIFY_DONE; |
Patrick McHardy | a242769 | 2006-03-20 18:03:59 -0800 | [diff] [blame] | 365 | |
| 366 | if (!nfnetlink_has_listeners(group)) |
| 367 | return NOTIFY_DONE; |
| 368 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 369 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC); |
| 370 | if (!skb) |
| 371 | return NOTIFY_DONE; |
| 372 | |
| 373 | b = skb->tail; |
| 374 | |
| 375 | type |= NFNL_SUBSYS_CTNETLINK << 8; |
| 376 | nlh = NLMSG_PUT(skb, 0, 0, type, sizeof(struct nfgenmsg)); |
| 377 | nfmsg = NLMSG_DATA(nlh); |
| 378 | |
| 379 | nlh->nlmsg_flags = flags; |
| 380 | nfmsg->nfgen_family = ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.l3num; |
| 381 | nfmsg->version = NFNETLINK_V0; |
| 382 | nfmsg->res_id = 0; |
| 383 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 384 | nest_parms = nla_nest_start(skb, CTA_TUPLE_ORIG | NLA_F_NESTED); |
| 385 | if (!nest_parms) |
| 386 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 387 | if (ctnetlink_dump_tuples(skb, tuple(ct, IP_CT_DIR_ORIGINAL)) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 388 | goto nla_put_failure; |
| 389 | nla_nest_end(skb, nest_parms); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 390 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 391 | nest_parms = nla_nest_start(skb, CTA_TUPLE_REPLY | NLA_F_NESTED); |
| 392 | if (!nest_parms) |
| 393 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 394 | if (ctnetlink_dump_tuples(skb, tuple(ct, IP_CT_DIR_REPLY)) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 395 | goto nla_put_failure; |
| 396 | nla_nest_end(skb, nest_parms); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 397 | |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 398 | if (events & IPCT_DESTROY) { |
| 399 | if (ctnetlink_dump_counters(skb, ct, IP_CT_DIR_ORIGINAL) < 0 || |
| 400 | ctnetlink_dump_counters(skb, ct, IP_CT_DIR_REPLY) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 401 | goto nla_put_failure; |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 402 | } else { |
| 403 | if (ctnetlink_dump_status(skb, ct) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 404 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 405 | |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 406 | if (ctnetlink_dump_timeout(skb, ct) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 407 | goto nla_put_failure; |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 408 | |
| 409 | if (events & IPCT_PROTOINFO |
| 410 | && ctnetlink_dump_protoinfo(skb, ct) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 411 | goto nla_put_failure; |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 412 | |
| 413 | if ((events & IPCT_HELPER || nfct_help(ct)) |
| 414 | && ctnetlink_dump_helpinfo(skb, ct) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 415 | goto nla_put_failure; |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 416 | |
Patrick McHardy | 40e0cb0 | 2007-02-02 19:33:11 -0800 | [diff] [blame] | 417 | #ifdef CONFIG_NF_CONNTRACK_MARK |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 418 | if ((events & IPCT_MARK || ct->mark) |
| 419 | && ctnetlink_dump_mark(skb, ct) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 420 | goto nla_put_failure; |
Patrick McHardy | 40e0cb0 | 2007-02-02 19:33:11 -0800 | [diff] [blame] | 421 | #endif |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 422 | |
| 423 | if (events & IPCT_COUNTER_FILLING && |
| 424 | (ctnetlink_dump_counters(skb, ct, IP_CT_DIR_ORIGINAL) < 0 || |
| 425 | ctnetlink_dump_counters(skb, ct, IP_CT_DIR_REPLY) < 0)) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 426 | goto nla_put_failure; |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 427 | } |
Pablo Neira Ayuso | b9a37e0 | 2006-08-22 00:31:49 -0700 | [diff] [blame] | 428 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 429 | nlh->nlmsg_len = skb->tail - b; |
| 430 | nfnetlink_send(skb, 0, group, 0); |
| 431 | return NOTIFY_DONE; |
| 432 | |
| 433 | nlmsg_failure: |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 434 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 435 | kfree_skb(skb); |
| 436 | return NOTIFY_DONE; |
| 437 | } |
| 438 | #endif /* CONFIG_NF_CONNTRACK_EVENTS */ |
| 439 | |
| 440 | static int ctnetlink_done(struct netlink_callback *cb) |
| 441 | { |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 442 | if (cb->args[1]) |
| 443 | nf_ct_put((struct nf_conn *)cb->args[1]); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 444 | return 0; |
| 445 | } |
| 446 | |
Pablo Neira Ayuso | 87711cb | 2006-01-05 12:19:23 -0800 | [diff] [blame] | 447 | #define L3PROTO(ct) ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.l3num |
| 448 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 449 | static int |
| 450 | ctnetlink_dump_table(struct sk_buff *skb, struct netlink_callback *cb) |
| 451 | { |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 452 | struct nf_conn *ct, *last; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 453 | struct nf_conntrack_tuple_hash *h; |
Patrick McHardy | f205c5e | 2007-07-07 22:28:14 -0700 | [diff] [blame] | 454 | struct hlist_node *n; |
Pablo Neira Ayuso | 87711cb | 2006-01-05 12:19:23 -0800 | [diff] [blame] | 455 | struct nfgenmsg *nfmsg = NLMSG_DATA(cb->nlh); |
| 456 | u_int8_t l3proto = nfmsg->nfgen_family; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 457 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 458 | read_lock_bh(&nf_conntrack_lock); |
Patrick McHardy | d205dc4 | 2006-08-17 18:12:38 -0700 | [diff] [blame] | 459 | last = (struct nf_conn *)cb->args[1]; |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 460 | for (; cb->args[0] < nf_conntrack_htable_size; cb->args[0]++) { |
| 461 | restart: |
Patrick McHardy | f205c5e | 2007-07-07 22:28:14 -0700 | [diff] [blame] | 462 | hlist_for_each_entry(h, n, &nf_conntrack_hash[cb->args[0]], |
| 463 | hnode) { |
Jozsef Kadlecsik | 5b1158e | 2006-12-02 22:07:13 -0800 | [diff] [blame] | 464 | if (NF_CT_DIRECTION(h) != IP_CT_DIR_ORIGINAL) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 465 | continue; |
| 466 | ct = nf_ct_tuplehash_to_ctrack(h); |
Pablo Neira Ayuso | 87711cb | 2006-01-05 12:19:23 -0800 | [diff] [blame] | 467 | /* Dump entries of a given L3 protocol number. |
| 468 | * If it is not specified, ie. l3proto == 0, |
| 469 | * then dump everything. */ |
| 470 | if (l3proto && L3PROTO(ct) != l3proto) |
| 471 | continue; |
Patrick McHardy | d205dc4 | 2006-08-17 18:12:38 -0700 | [diff] [blame] | 472 | if (cb->args[1]) { |
| 473 | if (ct != last) |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 474 | continue; |
Patrick McHardy | d205dc4 | 2006-08-17 18:12:38 -0700 | [diff] [blame] | 475 | cb->args[1] = 0; |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 476 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 477 | if (ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).pid, |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 478 | cb->nlh->nlmsg_seq, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 479 | IPCTNL_MSG_CT_NEW, |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 480 | 1, ct) < 0) { |
| 481 | nf_conntrack_get(&ct->ct_general); |
| 482 | cb->args[1] = (unsigned long)ct; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 483 | goto out; |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 484 | } |
Pablo Neira Ayuso | 01f3484 | 2006-09-20 12:00:45 -0700 | [diff] [blame] | 485 | #ifdef CONFIG_NF_CT_ACCT |
| 486 | if (NFNL_MSG_TYPE(cb->nlh->nlmsg_type) == |
| 487 | IPCTNL_MSG_CT_GET_CTRZERO) |
| 488 | memset(&ct->counters, 0, sizeof(ct->counters)); |
| 489 | #endif |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 490 | } |
Patrick McHardy | d205dc4 | 2006-08-17 18:12:38 -0700 | [diff] [blame] | 491 | if (cb->args[1]) { |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 492 | cb->args[1] = 0; |
| 493 | goto restart; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 494 | } |
| 495 | } |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 496 | out: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 497 | read_unlock_bh(&nf_conntrack_lock); |
Patrick McHardy | d205dc4 | 2006-08-17 18:12:38 -0700 | [diff] [blame] | 498 | if (last) |
| 499 | nf_ct_put(last); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 500 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 501 | return skb->len; |
| 502 | } |
| 503 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 504 | static inline int |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 505 | 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] | 506 | { |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 507 | struct nlattr *tb[CTA_IP_MAX+1]; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 508 | struct nf_conntrack_l3proto *l3proto; |
| 509 | int ret = 0; |
| 510 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 511 | nla_parse_nested(tb, CTA_IP_MAX, attr, NULL); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 512 | |
| 513 | l3proto = nf_ct_l3proto_find_get(tuple->src.l3num); |
| 514 | |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 515 | if (likely(l3proto->nlattr_to_tuple)) { |
| 516 | ret = nla_validate_nested(attr, CTA_IP_MAX, |
| 517 | l3proto->nla_policy); |
| 518 | if (ret == 0) |
| 519 | ret = l3proto->nlattr_to_tuple(tb, tuple); |
| 520 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 521 | |
| 522 | nf_ct_l3proto_put(l3proto); |
| 523 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 524 | return ret; |
| 525 | } |
| 526 | |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 527 | static const struct nla_policy proto_nla_policy[CTA_PROTO_MAX+1] = { |
| 528 | [CTA_PROTO_NUM] = { .type = NLA_U8 }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 529 | }; |
| 530 | |
| 531 | static inline int |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 532 | ctnetlink_parse_tuple_proto(struct nlattr *attr, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 533 | struct nf_conntrack_tuple *tuple) |
| 534 | { |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 535 | struct nlattr *tb[CTA_PROTO_MAX+1]; |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 536 | struct nf_conntrack_l4proto *l4proto; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 537 | int ret = 0; |
| 538 | |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 539 | ret = nla_parse_nested(tb, CTA_PROTO_MAX, attr, proto_nla_policy); |
| 540 | if (ret < 0) |
| 541 | return ret; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 542 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 543 | if (!tb[CTA_PROTO_NUM]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 544 | return -EINVAL; |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 545 | tuple->dst.protonum = *(u_int8_t *)nla_data(tb[CTA_PROTO_NUM]); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 546 | |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 547 | l4proto = nf_ct_l4proto_find_get(tuple->src.l3num, tuple->dst.protonum); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 548 | |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 549 | if (likely(l4proto->nlattr_to_tuple)) { |
| 550 | ret = nla_validate_nested(attr, CTA_PROTO_MAX, |
| 551 | l4proto->nla_policy); |
| 552 | if (ret == 0) |
| 553 | ret = l4proto->nlattr_to_tuple(tb, tuple); |
| 554 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 555 | |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 556 | nf_ct_l4proto_put(l4proto); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 557 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 558 | return ret; |
| 559 | } |
| 560 | |
| 561 | static inline int |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 562 | ctnetlink_parse_tuple(struct nlattr *cda[], struct nf_conntrack_tuple *tuple, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 563 | enum ctattr_tuple type, u_int8_t l3num) |
| 564 | { |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 565 | struct nlattr *tb[CTA_TUPLE_MAX+1]; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 566 | int err; |
| 567 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 568 | memset(tuple, 0, sizeof(*tuple)); |
| 569 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 570 | nla_parse_nested(tb, CTA_TUPLE_MAX, cda[type], NULL); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 571 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 572 | if (!tb[CTA_TUPLE_IP]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 573 | return -EINVAL; |
| 574 | |
| 575 | tuple->src.l3num = l3num; |
| 576 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 577 | err = ctnetlink_parse_tuple_ip(tb[CTA_TUPLE_IP], tuple); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 578 | if (err < 0) |
| 579 | return err; |
| 580 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 581 | if (!tb[CTA_TUPLE_PROTO]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 582 | return -EINVAL; |
| 583 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 584 | err = ctnetlink_parse_tuple_proto(tb[CTA_TUPLE_PROTO], tuple); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 585 | if (err < 0) |
| 586 | return err; |
| 587 | |
| 588 | /* orig and expect tuples get DIR_ORIGINAL */ |
| 589 | if (type == CTA_TUPLE_REPLY) |
| 590 | tuple->dst.dir = IP_CT_DIR_REPLY; |
| 591 | else |
| 592 | tuple->dst.dir = IP_CT_DIR_ORIGINAL; |
| 593 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 594 | return 0; |
| 595 | } |
| 596 | |
Jozsef Kadlecsik | 5b1158e | 2006-12-02 22:07:13 -0800 | [diff] [blame] | 597 | #ifdef CONFIG_NF_NAT_NEEDED |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 598 | static const struct nla_policy protonat_nla_policy[CTA_PROTONAT_MAX+1] = { |
| 599 | [CTA_PROTONAT_PORT_MIN] = { .type = NLA_U16 }, |
| 600 | [CTA_PROTONAT_PORT_MAX] = { .type = NLA_U16 }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 601 | }; |
| 602 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 603 | static int nfnetlink_parse_nat_proto(struct nlattr *attr, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 604 | const struct nf_conn *ct, |
Jozsef Kadlecsik | 5b1158e | 2006-12-02 22:07:13 -0800 | [diff] [blame] | 605 | struct nf_nat_range *range) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 606 | { |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 607 | struct nlattr *tb[CTA_PROTONAT_MAX+1]; |
Jozsef Kadlecsik | 5b1158e | 2006-12-02 22:07:13 -0800 | [diff] [blame] | 608 | struct nf_nat_protocol *npt; |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 609 | int err; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 610 | |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 611 | err = nla_parse_nested(tb, CTA_PROTONAT_MAX, attr, protonat_nla_policy); |
| 612 | if (err < 0) |
| 613 | return err; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 614 | |
Jozsef Kadlecsik | 5b1158e | 2006-12-02 22:07:13 -0800 | [diff] [blame] | 615 | npt = nf_nat_proto_find_get(ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.protonum); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 616 | |
Patrick McHardy | fdf7083 | 2007-09-28 14:37:41 -0700 | [diff] [blame] | 617 | if (!npt->nlattr_to_range) { |
Jozsef Kadlecsik | 5b1158e | 2006-12-02 22:07:13 -0800 | [diff] [blame] | 618 | nf_nat_proto_put(npt); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 619 | return 0; |
| 620 | } |
| 621 | |
Patrick McHardy | fdf7083 | 2007-09-28 14:37:41 -0700 | [diff] [blame] | 622 | /* nlattr_to_range returns 1 if it parsed, 0 if not, neg. on error */ |
| 623 | if (npt->nlattr_to_range(tb, range) > 0) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 624 | range->flags |= IP_NAT_RANGE_PROTO_SPECIFIED; |
| 625 | |
Jozsef Kadlecsik | 5b1158e | 2006-12-02 22:07:13 -0800 | [diff] [blame] | 626 | nf_nat_proto_put(npt); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 627 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 628 | return 0; |
| 629 | } |
| 630 | |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 631 | static const struct nla_policy nat_nla_policy[CTA_NAT_MAX+1] = { |
| 632 | [CTA_NAT_MINIP] = { .type = NLA_U32 }, |
| 633 | [CTA_NAT_MAXIP] = { .type = NLA_U32 }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 634 | }; |
| 635 | |
| 636 | static inline int |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 637 | nfnetlink_parse_nat(struct nlattr *nat, |
Jozsef Kadlecsik | 5b1158e | 2006-12-02 22:07:13 -0800 | [diff] [blame] | 638 | const struct nf_conn *ct, struct nf_nat_range *range) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 639 | { |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 640 | struct nlattr *tb[CTA_NAT_MAX+1]; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 641 | int err; |
| 642 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 643 | memset(range, 0, sizeof(*range)); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 644 | |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 645 | err = nla_parse_nested(tb, CTA_NAT_MAX, nat, nat_nla_policy); |
| 646 | if (err < 0) |
| 647 | return err; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 648 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 649 | if (tb[CTA_NAT_MINIP]) |
| 650 | range->min_ip = *(__be32 *)nla_data(tb[CTA_NAT_MINIP]); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 651 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 652 | if (!tb[CTA_NAT_MAXIP]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 653 | range->max_ip = range->min_ip; |
| 654 | else |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 655 | range->max_ip = *(__be32 *)nla_data(tb[CTA_NAT_MAXIP]); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 656 | |
| 657 | if (range->min_ip) |
| 658 | range->flags |= IP_NAT_RANGE_MAP_IPS; |
| 659 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 660 | if (!tb[CTA_NAT_PROTO]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 661 | return 0; |
| 662 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 663 | err = nfnetlink_parse_nat_proto(tb[CTA_NAT_PROTO], ct, range); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 664 | if (err < 0) |
| 665 | return err; |
| 666 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 667 | return 0; |
| 668 | } |
| 669 | #endif |
| 670 | |
| 671 | static inline int |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 672 | ctnetlink_parse_help(struct nlattr *attr, char **helper_name) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 673 | { |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 674 | struct nlattr *tb[CTA_HELP_MAX+1]; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 675 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 676 | nla_parse_nested(tb, CTA_HELP_MAX, attr, NULL); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 677 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 678 | if (!tb[CTA_HELP_NAME]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 679 | return -EINVAL; |
| 680 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 681 | *helper_name = nla_data(tb[CTA_HELP_NAME]); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 682 | |
| 683 | return 0; |
| 684 | } |
| 685 | |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 686 | static const struct nla_policy ct_nla_policy[CTA_MAX+1] = { |
| 687 | [CTA_STATUS] = { .type = NLA_U32 }, |
| 688 | [CTA_TIMEOUT] = { .type = NLA_U32 }, |
| 689 | [CTA_MARK] = { .type = NLA_U32 }, |
| 690 | [CTA_USE] = { .type = NLA_U32 }, |
| 691 | [CTA_ID] = { .type = NLA_U32 }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 692 | }; |
| 693 | |
| 694 | static int |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 695 | ctnetlink_del_conntrack(struct sock *ctnl, struct sk_buff *skb, |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 696 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 697 | { |
| 698 | struct nf_conntrack_tuple_hash *h; |
| 699 | struct nf_conntrack_tuple tuple; |
| 700 | struct nf_conn *ct; |
| 701 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); |
| 702 | u_int8_t u3 = nfmsg->nfgen_family; |
| 703 | int err = 0; |
| 704 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 705 | if (cda[CTA_TUPLE_ORIG]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 706 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, u3); |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 707 | else if (cda[CTA_TUPLE_REPLY]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 708 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, u3); |
| 709 | else { |
| 710 | /* Flush the whole table */ |
| 711 | nf_conntrack_flush(); |
| 712 | return 0; |
| 713 | } |
| 714 | |
| 715 | if (err < 0) |
| 716 | return err; |
| 717 | |
Patrick McHardy | 330f7db | 2007-07-07 22:28:42 -0700 | [diff] [blame] | 718 | h = nf_conntrack_find_get(&tuple); |
Pablo Neira Ayuso | 9ea8cfd | 2006-10-12 14:09:16 -0700 | [diff] [blame] | 719 | if (!h) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 720 | return -ENOENT; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 721 | |
| 722 | ct = nf_ct_tuplehash_to_ctrack(h); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 723 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 724 | if (cda[CTA_ID]) { |
| 725 | u_int32_t id = ntohl(*(__be32 *)nla_data(cda[CTA_ID])); |
Patrick McHardy | 7f85f91 | 2007-09-28 14:41:27 -0700 | [diff] [blame] | 726 | if (id != (u32)(unsigned long)ct) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 727 | nf_ct_put(ct); |
| 728 | return -ENOENT; |
| 729 | } |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 730 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 731 | if (del_timer(&ct->timeout)) |
| 732 | ct->timeout.function((unsigned long)ct); |
| 733 | |
| 734 | nf_ct_put(ct); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 735 | |
| 736 | return 0; |
| 737 | } |
| 738 | |
| 739 | static int |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 740 | ctnetlink_get_conntrack(struct sock *ctnl, struct sk_buff *skb, |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 741 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 742 | { |
| 743 | struct nf_conntrack_tuple_hash *h; |
| 744 | struct nf_conntrack_tuple tuple; |
| 745 | struct nf_conn *ct; |
| 746 | struct sk_buff *skb2 = NULL; |
| 747 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); |
| 748 | u_int8_t u3 = nfmsg->nfgen_family; |
| 749 | int err = 0; |
| 750 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 751 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
Pablo Neira Ayuso | 01f3484 | 2006-09-20 12:00:45 -0700 | [diff] [blame] | 752 | #ifndef CONFIG_NF_CT_ACCT |
| 753 | if (NFNL_MSG_TYPE(nlh->nlmsg_type) == IPCTNL_MSG_CT_GET_CTRZERO) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 754 | return -ENOTSUPP; |
| 755 | #endif |
Thomas Graf | c702e80 | 2007-03-22 23:30:55 -0700 | [diff] [blame] | 756 | return netlink_dump_start(ctnl, skb, nlh, ctnetlink_dump_table, |
| 757 | ctnetlink_done); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 758 | } |
| 759 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 760 | if (cda[CTA_TUPLE_ORIG]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 761 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, u3); |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 762 | else if (cda[CTA_TUPLE_REPLY]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 763 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, u3); |
| 764 | else |
| 765 | return -EINVAL; |
| 766 | |
| 767 | if (err < 0) |
| 768 | return err; |
| 769 | |
Patrick McHardy | 330f7db | 2007-07-07 22:28:42 -0700 | [diff] [blame] | 770 | h = nf_conntrack_find_get(&tuple); |
Pablo Neira Ayuso | 9ea8cfd | 2006-10-12 14:09:16 -0700 | [diff] [blame] | 771 | if (!h) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 772 | return -ENOENT; |
Pablo Neira Ayuso | 9ea8cfd | 2006-10-12 14:09:16 -0700 | [diff] [blame] | 773 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 774 | ct = nf_ct_tuplehash_to_ctrack(h); |
| 775 | |
| 776 | err = -ENOMEM; |
| 777 | skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); |
| 778 | if (!skb2) { |
| 779 | nf_ct_put(ct); |
| 780 | return -ENOMEM; |
| 781 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 782 | |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 783 | err = ctnetlink_fill_info(skb2, NETLINK_CB(skb).pid, nlh->nlmsg_seq, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 784 | IPCTNL_MSG_CT_NEW, 1, ct); |
| 785 | nf_ct_put(ct); |
| 786 | if (err <= 0) |
| 787 | goto free; |
| 788 | |
| 789 | err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).pid, MSG_DONTWAIT); |
| 790 | if (err < 0) |
| 791 | goto out; |
| 792 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 793 | return 0; |
| 794 | |
| 795 | free: |
| 796 | kfree_skb(skb2); |
| 797 | out: |
| 798 | return err; |
| 799 | } |
| 800 | |
| 801 | static inline int |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 802 | ctnetlink_change_status(struct nf_conn *ct, struct nlattr *cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 803 | { |
| 804 | unsigned long d; |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 805 | unsigned int status = ntohl(*(__be32 *)nla_data(cda[CTA_STATUS])); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 806 | d = ct->status ^ status; |
| 807 | |
| 808 | if (d & (IPS_EXPECTED|IPS_CONFIRMED|IPS_DYING)) |
| 809 | /* unchangeable */ |
| 810 | return -EINVAL; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 811 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 812 | if (d & IPS_SEEN_REPLY && !(status & IPS_SEEN_REPLY)) |
| 813 | /* SEEN_REPLY bit can only be set */ |
| 814 | return -EINVAL; |
| 815 | |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 816 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 817 | if (d & IPS_ASSURED && !(status & IPS_ASSURED)) |
| 818 | /* ASSURED bit can only be set */ |
| 819 | return -EINVAL; |
| 820 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 821 | if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST]) { |
Jozsef Kadlecsik | 5b1158e | 2006-12-02 22:07:13 -0800 | [diff] [blame] | 822 | #ifndef CONFIG_NF_NAT_NEEDED |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 823 | return -EINVAL; |
| 824 | #else |
Jozsef Kadlecsik | 5b1158e | 2006-12-02 22:07:13 -0800 | [diff] [blame] | 825 | struct nf_nat_range range; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 826 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 827 | if (cda[CTA_NAT_DST]) { |
| 828 | if (nfnetlink_parse_nat(cda[CTA_NAT_DST], ct, |
Patrick McHardy | 3726add | 2006-05-29 18:24:39 -0700 | [diff] [blame] | 829 | &range) < 0) |
| 830 | return -EINVAL; |
Jozsef Kadlecsik | 5b1158e | 2006-12-02 22:07:13 -0800 | [diff] [blame] | 831 | if (nf_nat_initialized(ct, |
Patrick McHardy | 3726add | 2006-05-29 18:24:39 -0700 | [diff] [blame] | 832 | HOOK2MANIP(NF_IP_PRE_ROUTING))) |
| 833 | return -EEXIST; |
Jozsef Kadlecsik | 5b1158e | 2006-12-02 22:07:13 -0800 | [diff] [blame] | 834 | nf_nat_setup_info(ct, &range, NF_IP_PRE_ROUTING); |
Patrick McHardy | 3726add | 2006-05-29 18:24:39 -0700 | [diff] [blame] | 835 | } |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 836 | if (cda[CTA_NAT_SRC]) { |
| 837 | if (nfnetlink_parse_nat(cda[CTA_NAT_SRC], ct, |
Patrick McHardy | 3726add | 2006-05-29 18:24:39 -0700 | [diff] [blame] | 838 | &range) < 0) |
| 839 | return -EINVAL; |
Jozsef Kadlecsik | 5b1158e | 2006-12-02 22:07:13 -0800 | [diff] [blame] | 840 | if (nf_nat_initialized(ct, |
Patrick McHardy | 3726add | 2006-05-29 18:24:39 -0700 | [diff] [blame] | 841 | HOOK2MANIP(NF_IP_POST_ROUTING))) |
| 842 | return -EEXIST; |
Jozsef Kadlecsik | 5b1158e | 2006-12-02 22:07:13 -0800 | [diff] [blame] | 843 | nf_nat_setup_info(ct, &range, NF_IP_POST_ROUTING); |
Patrick McHardy | 3726add | 2006-05-29 18:24:39 -0700 | [diff] [blame] | 844 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 845 | #endif |
| 846 | } |
| 847 | |
| 848 | /* Be careful here, modifying NAT bits can screw up things, |
| 849 | * 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] | 850 | * nf_nat_range. */ |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 851 | ct->status |= status & ~(IPS_NAT_DONE_MASK | IPS_NAT_MASK); |
| 852 | return 0; |
| 853 | } |
| 854 | |
| 855 | |
| 856 | static inline int |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 857 | ctnetlink_change_helper(struct nf_conn *ct, struct nlattr *cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 858 | { |
| 859 | struct nf_conntrack_helper *helper; |
Harald Welte | dc808fe | 2006-03-20 17:56:32 -0800 | [diff] [blame] | 860 | struct nf_conn_help *help = nfct_help(ct); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 861 | char *helpname; |
| 862 | int err; |
| 863 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 864 | /* don't change helper of sibling connections */ |
| 865 | if (ct->master) |
| 866 | return -EINVAL; |
| 867 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 868 | err = ctnetlink_parse_help(cda[CTA_HELP], &helpname); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 869 | if (err < 0) |
| 870 | return err; |
| 871 | |
Yasuyuki Kozakai | df293bb | 2007-05-10 14:15:58 -0700 | [diff] [blame] | 872 | if (!strcmp(helpname, "")) { |
| 873 | if (help && help->helper) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 874 | /* we had a helper before ... */ |
| 875 | nf_ct_remove_expectations(ct); |
Patrick McHarrdy | 3c158f7 | 2007-06-05 12:55:27 -0700 | [diff] [blame] | 876 | rcu_assign_pointer(help->helper, NULL); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 877 | } |
Yasuyuki Kozakai | df293bb | 2007-05-10 14:15:58 -0700 | [diff] [blame] | 878 | |
| 879 | return 0; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 880 | } |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 881 | |
Yasuyuki Kozakai | df293bb | 2007-05-10 14:15:58 -0700 | [diff] [blame] | 882 | helper = __nf_conntrack_helper_find_byname(helpname); |
| 883 | if (helper == NULL) |
| 884 | return -EINVAL; |
| 885 | |
Yasuyuki Kozakai | ceceae1 | 2007-07-07 22:23:42 -0700 | [diff] [blame] | 886 | if (help) { |
| 887 | if (help->helper == helper) |
| 888 | return 0; |
| 889 | if (help->helper) |
| 890 | return -EBUSY; |
| 891 | /* need to zero data of old helper */ |
| 892 | memset(&help->help, 0, sizeof(help->help)); |
| 893 | } else { |
Patrick McHardy | b560580 | 2007-07-07 22:35:56 -0700 | [diff] [blame] | 894 | help = nf_ct_helper_ext_add(ct, GFP_KERNEL); |
Yasuyuki Kozakai | ceceae1 | 2007-07-07 22:23:42 -0700 | [diff] [blame] | 895 | if (help == NULL) |
| 896 | return -ENOMEM; |
| 897 | } |
Yasuyuki Kozakai | df293bb | 2007-05-10 14:15:58 -0700 | [diff] [blame] | 898 | |
Patrick McHarrdy | 3c158f7 | 2007-06-05 12:55:27 -0700 | [diff] [blame] | 899 | rcu_assign_pointer(help->helper, helper); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 900 | |
| 901 | return 0; |
| 902 | } |
| 903 | |
| 904 | static inline int |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 905 | ctnetlink_change_timeout(struct nf_conn *ct, struct nlattr *cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 906 | { |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 907 | u_int32_t timeout = ntohl(*(__be32 *)nla_data(cda[CTA_TIMEOUT])); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 908 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 909 | if (!del_timer(&ct->timeout)) |
| 910 | return -ETIME; |
| 911 | |
| 912 | ct->timeout.expires = jiffies + timeout * HZ; |
| 913 | add_timer(&ct->timeout); |
| 914 | |
| 915 | return 0; |
| 916 | } |
| 917 | |
| 918 | static inline int |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 919 | ctnetlink_change_protoinfo(struct nf_conn *ct, struct nlattr *cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 920 | { |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 921 | struct nlattr *tb[CTA_PROTOINFO_MAX+1], *attr = cda[CTA_PROTOINFO]; |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 922 | struct nf_conntrack_l4proto *l4proto; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 923 | u_int16_t npt = ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.protonum; |
| 924 | u_int16_t l3num = ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.l3num; |
| 925 | int err = 0; |
| 926 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 927 | nla_parse_nested(tb, CTA_PROTOINFO_MAX, attr, NULL); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 928 | |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 929 | l4proto = nf_ct_l4proto_find_get(l3num, npt); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 930 | |
Patrick McHardy | fdf7083 | 2007-09-28 14:37:41 -0700 | [diff] [blame] | 931 | if (l4proto->from_nlattr) |
| 932 | err = l4proto->from_nlattr(tb, ct); |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 933 | nf_ct_l4proto_put(l4proto); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 934 | |
| 935 | return err; |
| 936 | } |
| 937 | |
| 938 | static int |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 939 | ctnetlink_change_conntrack(struct nf_conn *ct, struct nlattr *cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 940 | { |
| 941 | int err; |
| 942 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 943 | if (cda[CTA_HELP]) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 944 | err = ctnetlink_change_helper(ct, cda); |
| 945 | if (err < 0) |
| 946 | return err; |
| 947 | } |
| 948 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 949 | if (cda[CTA_TIMEOUT]) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 950 | err = ctnetlink_change_timeout(ct, cda); |
| 951 | if (err < 0) |
| 952 | return err; |
| 953 | } |
| 954 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 955 | if (cda[CTA_STATUS]) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 956 | err = ctnetlink_change_status(ct, cda); |
| 957 | if (err < 0) |
| 958 | return err; |
| 959 | } |
| 960 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 961 | if (cda[CTA_PROTOINFO]) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 962 | err = ctnetlink_change_protoinfo(ct, cda); |
| 963 | if (err < 0) |
| 964 | return err; |
| 965 | } |
| 966 | |
Martin Josefsson | bcd1e83 | 2006-04-01 02:23:21 -0800 | [diff] [blame] | 967 | #if defined(CONFIG_NF_CONNTRACK_MARK) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 968 | if (cda[CTA_MARK]) |
| 969 | ct->mark = ntohl(*(__be32 *)nla_data(cda[CTA_MARK])); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 970 | #endif |
| 971 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 972 | return 0; |
| 973 | } |
| 974 | |
| 975 | static int |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 976 | ctnetlink_create_conntrack(struct nlattr *cda[], |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 977 | struct nf_conntrack_tuple *otuple, |
Pablo Neira Ayuso | 5faa1f4 | 2007-09-28 14:43:53 -0700 | [diff] [blame] | 978 | struct nf_conntrack_tuple *rtuple, |
| 979 | struct nf_conn *master_ct) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 980 | { |
| 981 | struct nf_conn *ct; |
| 982 | int err = -EINVAL; |
Yasuyuki Kozakai | dafc741 | 2006-11-27 10:25:32 -0800 | [diff] [blame] | 983 | struct nf_conn_help *help; |
Yasuyuki Kozakai | ceceae1 | 2007-07-07 22:23:42 -0700 | [diff] [blame] | 984 | struct nf_conntrack_helper *helper; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 985 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 986 | ct = nf_conntrack_alloc(otuple, rtuple); |
| 987 | if (ct == NULL || IS_ERR(ct)) |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 988 | return -ENOMEM; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 989 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 990 | if (!cda[CTA_TIMEOUT]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 991 | goto err; |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 992 | ct->timeout.expires = ntohl(*(__be32 *)nla_data(cda[CTA_TIMEOUT])); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 993 | |
| 994 | ct->timeout.expires = jiffies + ct->timeout.expires * HZ; |
| 995 | ct->status |= IPS_CONFIRMED; |
| 996 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 997 | if (cda[CTA_STATUS]) { |
Pablo Neira Ayuso | bbb3357 | 2006-11-29 02:35:31 +0100 | [diff] [blame] | 998 | err = ctnetlink_change_status(ct, cda); |
| 999 | if (err < 0) |
| 1000 | goto err; |
| 1001 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1002 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1003 | if (cda[CTA_PROTOINFO]) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1004 | err = ctnetlink_change_protoinfo(ct, cda); |
| 1005 | if (err < 0) |
Patrick McHardy | c54ea3b | 2007-01-15 17:16:03 -0800 | [diff] [blame] | 1006 | goto err; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1007 | } |
| 1008 | |
Martin Josefsson | bcd1e83 | 2006-04-01 02:23:21 -0800 | [diff] [blame] | 1009 | #if defined(CONFIG_NF_CONNTRACK_MARK) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1010 | if (cda[CTA_MARK]) |
| 1011 | ct->mark = ntohl(*(__be32 *)nla_data(cda[CTA_MARK])); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1012 | #endif |
| 1013 | |
Yasuyuki Kozakai | ceceae1 | 2007-07-07 22:23:42 -0700 | [diff] [blame] | 1014 | helper = nf_ct_helper_find_get(rtuple); |
| 1015 | if (helper) { |
Patrick McHardy | b560580 | 2007-07-07 22:35:56 -0700 | [diff] [blame] | 1016 | help = nf_ct_helper_ext_add(ct, GFP_KERNEL); |
Yasuyuki Kozakai | ceceae1 | 2007-07-07 22:23:42 -0700 | [diff] [blame] | 1017 | if (help == NULL) { |
| 1018 | nf_ct_helper_put(helper); |
| 1019 | err = -ENOMEM; |
| 1020 | goto err; |
| 1021 | } |
Patrick McHarrdy | 3c158f7 | 2007-06-05 12:55:27 -0700 | [diff] [blame] | 1022 | /* not in hash table yet so not strictly necessary */ |
| 1023 | rcu_assign_pointer(help->helper, helper); |
| 1024 | } |
Yasuyuki Kozakai | dafc741 | 2006-11-27 10:25:32 -0800 | [diff] [blame] | 1025 | |
Pablo Neira Ayuso | 5faa1f4 | 2007-09-28 14:43:53 -0700 | [diff] [blame] | 1026 | /* setup master conntrack: this is a confirmed expectation */ |
Pablo Neira Ayuso | f2a8900 | 2007-12-12 10:34:29 -0800 | [diff] [blame^] | 1027 | if (master_ct) { |
| 1028 | __set_bit(IPS_EXPECTED_BIT, &ct->status); |
Pablo Neira Ayuso | 5faa1f4 | 2007-09-28 14:43:53 -0700 | [diff] [blame] | 1029 | ct->master = master_ct; |
Pablo Neira Ayuso | f2a8900 | 2007-12-12 10:34:29 -0800 | [diff] [blame^] | 1030 | } |
Pablo Neira Ayuso | 5faa1f4 | 2007-09-28 14:43:53 -0700 | [diff] [blame] | 1031 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1032 | add_timer(&ct->timeout); |
| 1033 | nf_conntrack_hash_insert(ct); |
| 1034 | |
Patrick McHarrdy | 3c158f7 | 2007-06-05 12:55:27 -0700 | [diff] [blame] | 1035 | if (helper) |
| 1036 | nf_ct_helper_put(helper); |
Yasuyuki Kozakai | dafc741 | 2006-11-27 10:25:32 -0800 | [diff] [blame] | 1037 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1038 | return 0; |
| 1039 | |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1040 | err: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1041 | nf_conntrack_free(ct); |
| 1042 | return err; |
| 1043 | } |
| 1044 | |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1045 | static int |
| 1046 | ctnetlink_new_conntrack(struct sock *ctnl, struct sk_buff *skb, |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1047 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1048 | { |
| 1049 | struct nf_conntrack_tuple otuple, rtuple; |
| 1050 | struct nf_conntrack_tuple_hash *h = NULL; |
| 1051 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); |
| 1052 | u_int8_t u3 = nfmsg->nfgen_family; |
| 1053 | int err = 0; |
| 1054 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1055 | if (cda[CTA_TUPLE_ORIG]) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1056 | err = ctnetlink_parse_tuple(cda, &otuple, CTA_TUPLE_ORIG, u3); |
| 1057 | if (err < 0) |
| 1058 | return err; |
| 1059 | } |
| 1060 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1061 | if (cda[CTA_TUPLE_REPLY]) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1062 | err = ctnetlink_parse_tuple(cda, &rtuple, CTA_TUPLE_REPLY, u3); |
| 1063 | if (err < 0) |
| 1064 | return err; |
| 1065 | } |
| 1066 | |
| 1067 | write_lock_bh(&nf_conntrack_lock); |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1068 | if (cda[CTA_TUPLE_ORIG]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1069 | h = __nf_conntrack_find(&otuple, NULL); |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1070 | else if (cda[CTA_TUPLE_REPLY]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1071 | h = __nf_conntrack_find(&rtuple, NULL); |
| 1072 | |
| 1073 | if (h == NULL) { |
Pablo Neira Ayuso | 5faa1f4 | 2007-09-28 14:43:53 -0700 | [diff] [blame] | 1074 | struct nf_conntrack_tuple master; |
| 1075 | struct nf_conntrack_tuple_hash *master_h = NULL; |
| 1076 | struct nf_conn *master_ct = NULL; |
| 1077 | |
| 1078 | if (cda[CTA_TUPLE_MASTER]) { |
| 1079 | err = ctnetlink_parse_tuple(cda, |
| 1080 | &master, |
| 1081 | CTA_TUPLE_MASTER, |
| 1082 | u3); |
| 1083 | if (err < 0) |
| 1084 | return err; |
| 1085 | |
| 1086 | master_h = __nf_conntrack_find(&master, NULL); |
| 1087 | if (master_h == NULL) { |
| 1088 | err = -ENOENT; |
| 1089 | goto out_unlock; |
| 1090 | } |
| 1091 | master_ct = nf_ct_tuplehash_to_ctrack(master_h); |
| 1092 | atomic_inc(&master_ct->ct_general.use); |
| 1093 | } |
| 1094 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1095 | write_unlock_bh(&nf_conntrack_lock); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1096 | err = -ENOENT; |
| 1097 | if (nlh->nlmsg_flags & NLM_F_CREATE) |
Pablo Neira Ayuso | 5faa1f4 | 2007-09-28 14:43:53 -0700 | [diff] [blame] | 1098 | err = ctnetlink_create_conntrack(cda, |
| 1099 | &otuple, |
| 1100 | &rtuple, |
| 1101 | master_ct); |
| 1102 | if (err < 0 && master_ct) |
| 1103 | nf_ct_put(master_ct); |
| 1104 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1105 | return err; |
| 1106 | } |
| 1107 | /* implicit 'else' */ |
| 1108 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1109 | /* We manipulate the conntrack inside the global conntrack table lock, |
| 1110 | * so there's no need to increase the refcount */ |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1111 | err = -EEXIST; |
Pablo Neira Ayuso | ff4ca82 | 2007-08-07 18:11:26 -0700 | [diff] [blame] | 1112 | if (!(nlh->nlmsg_flags & NLM_F_EXCL)) { |
| 1113 | /* we only allow nat config for new conntracks */ |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1114 | if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST]) { |
Pablo Neira Ayuso | ff4ca82 | 2007-08-07 18:11:26 -0700 | [diff] [blame] | 1115 | err = -EINVAL; |
| 1116 | goto out_unlock; |
| 1117 | } |
Pablo Neira Ayuso | 5faa1f4 | 2007-09-28 14:43:53 -0700 | [diff] [blame] | 1118 | /* can't link an existing conntrack to a master */ |
| 1119 | if (cda[CTA_TUPLE_MASTER]) { |
| 1120 | err = -EINVAL; |
| 1121 | goto out_unlock; |
| 1122 | } |
Pablo Neira Ayuso | ff4ca82 | 2007-08-07 18:11:26 -0700 | [diff] [blame] | 1123 | err = ctnetlink_change_conntrack(nf_ct_tuplehash_to_ctrack(h), |
| 1124 | cda); |
| 1125 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1126 | |
| 1127 | out_unlock: |
| 1128 | write_unlock_bh(&nf_conntrack_lock); |
| 1129 | return err; |
| 1130 | } |
| 1131 | |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1132 | /*********************************************************************** |
| 1133 | * EXPECT |
| 1134 | ***********************************************************************/ |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1135 | |
| 1136 | static inline int |
| 1137 | ctnetlink_exp_dump_tuple(struct sk_buff *skb, |
| 1138 | const struct nf_conntrack_tuple *tuple, |
| 1139 | enum ctattr_expect type) |
| 1140 | { |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1141 | struct nlattr *nest_parms; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1142 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1143 | nest_parms = nla_nest_start(skb, type | NLA_F_NESTED); |
| 1144 | if (!nest_parms) |
| 1145 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1146 | if (ctnetlink_dump_tuples(skb, tuple) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1147 | goto nla_put_failure; |
| 1148 | nla_nest_end(skb, nest_parms); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1149 | |
| 1150 | return 0; |
| 1151 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1152 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1153 | return -1; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1154 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1155 | |
| 1156 | static inline int |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 1157 | ctnetlink_exp_dump_mask(struct sk_buff *skb, |
| 1158 | const struct nf_conntrack_tuple *tuple, |
Patrick McHardy | d4156e8 | 2007-07-07 22:31:32 -0700 | [diff] [blame] | 1159 | const struct nf_conntrack_tuple_mask *mask) |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 1160 | { |
| 1161 | int ret; |
| 1162 | struct nf_conntrack_l3proto *l3proto; |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 1163 | struct nf_conntrack_l4proto *l4proto; |
Patrick McHardy | d4156e8 | 2007-07-07 22:31:32 -0700 | [diff] [blame] | 1164 | struct nf_conntrack_tuple m; |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1165 | struct nlattr *nest_parms; |
Patrick McHardy | d4156e8 | 2007-07-07 22:31:32 -0700 | [diff] [blame] | 1166 | |
| 1167 | memset(&m, 0xFF, sizeof(m)); |
| 1168 | m.src.u.all = mask->src.u.all; |
| 1169 | memcpy(&m.src.u3, &mask->src.u3, sizeof(m.src.u3)); |
| 1170 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1171 | nest_parms = nla_nest_start(skb, CTA_EXPECT_MASK | NLA_F_NESTED); |
| 1172 | if (!nest_parms) |
| 1173 | goto nla_put_failure; |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 1174 | |
| 1175 | l3proto = nf_ct_l3proto_find_get(tuple->src.l3num); |
Patrick McHardy | d4156e8 | 2007-07-07 22:31:32 -0700 | [diff] [blame] | 1176 | ret = ctnetlink_dump_tuples_ip(skb, &m, l3proto); |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 1177 | nf_ct_l3proto_put(l3proto); |
| 1178 | |
| 1179 | if (unlikely(ret < 0)) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1180 | goto nla_put_failure; |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 1181 | |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 1182 | l4proto = nf_ct_l4proto_find_get(tuple->src.l3num, tuple->dst.protonum); |
Patrick McHardy | d4156e8 | 2007-07-07 22:31:32 -0700 | [diff] [blame] | 1183 | ret = ctnetlink_dump_tuples_proto(skb, &m, l4proto); |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 1184 | nf_ct_l4proto_put(l4proto); |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 1185 | if (unlikely(ret < 0)) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1186 | goto nla_put_failure; |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 1187 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1188 | nla_nest_end(skb, nest_parms); |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 1189 | |
| 1190 | return 0; |
| 1191 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1192 | nla_put_failure: |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 1193 | return -1; |
| 1194 | } |
| 1195 | |
| 1196 | static inline int |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1197 | ctnetlink_exp_dump_expect(struct sk_buff *skb, |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1198 | const struct nf_conntrack_expect *exp) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1199 | { |
| 1200 | struct nf_conn *master = exp->master; |
Patrick McHardy | bff9a89 | 2006-12-02 22:05:08 -0800 | [diff] [blame] | 1201 | __be32 timeout = htonl((exp->timeout.expires - jiffies) / HZ); |
Patrick McHardy | 3583240 | 2007-09-28 14:41:50 -0700 | [diff] [blame] | 1202 | __be32 id = htonl((unsigned long)exp); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1203 | |
| 1204 | if (ctnetlink_exp_dump_tuple(skb, &exp->tuple, CTA_EXPECT_TUPLE) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1205 | goto nla_put_failure; |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 1206 | if (ctnetlink_exp_dump_mask(skb, &exp->tuple, &exp->mask) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1207 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1208 | if (ctnetlink_exp_dump_tuple(skb, |
| 1209 | &master->tuplehash[IP_CT_DIR_ORIGINAL].tuple, |
| 1210 | CTA_EXPECT_MASTER) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1211 | goto nla_put_failure; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1212 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1213 | NLA_PUT(skb, CTA_EXPECT_TIMEOUT, sizeof(timeout), &timeout); |
| 1214 | NLA_PUT(skb, CTA_EXPECT_ID, sizeof(u_int32_t), &id); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1215 | |
| 1216 | return 0; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1217 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1218 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1219 | return -1; |
| 1220 | } |
| 1221 | |
| 1222 | static int |
| 1223 | ctnetlink_exp_fill_info(struct sk_buff *skb, u32 pid, u32 seq, |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1224 | int event, |
| 1225 | int nowait, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1226 | const struct nf_conntrack_expect *exp) |
| 1227 | { |
| 1228 | struct nlmsghdr *nlh; |
| 1229 | struct nfgenmsg *nfmsg; |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 1230 | unsigned char *b = skb_tail_pointer(skb); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1231 | |
| 1232 | event |= NFNL_SUBSYS_CTNETLINK_EXP << 8; |
| 1233 | nlh = NLMSG_PUT(skb, pid, seq, event, sizeof(struct nfgenmsg)); |
| 1234 | nfmsg = NLMSG_DATA(nlh); |
| 1235 | |
| 1236 | nlh->nlmsg_flags = (nowait && pid) ? NLM_F_MULTI : 0; |
| 1237 | nfmsg->nfgen_family = exp->tuple.src.l3num; |
| 1238 | nfmsg->version = NFNETLINK_V0; |
| 1239 | nfmsg->res_id = 0; |
| 1240 | |
| 1241 | if (ctnetlink_exp_dump_expect(skb, exp) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1242 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1243 | |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 1244 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1245 | return skb->len; |
| 1246 | |
| 1247 | nlmsg_failure: |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1248 | nla_put_failure: |
Arnaldo Carvalho de Melo | dc5fc57 | 2007-03-25 23:06:12 -0700 | [diff] [blame] | 1249 | nlmsg_trim(skb, b); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1250 | return -1; |
| 1251 | } |
| 1252 | |
| 1253 | #ifdef CONFIG_NF_CONNTRACK_EVENTS |
| 1254 | static int ctnetlink_expect_event(struct notifier_block *this, |
| 1255 | unsigned long events, void *ptr) |
| 1256 | { |
| 1257 | struct nlmsghdr *nlh; |
| 1258 | struct nfgenmsg *nfmsg; |
| 1259 | struct nf_conntrack_expect *exp = (struct nf_conntrack_expect *)ptr; |
| 1260 | struct sk_buff *skb; |
| 1261 | unsigned int type; |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 1262 | sk_buff_data_t b; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1263 | int flags = 0; |
| 1264 | |
| 1265 | if (events & IPEXP_NEW) { |
| 1266 | type = IPCTNL_MSG_EXP_NEW; |
| 1267 | flags = NLM_F_CREATE|NLM_F_EXCL; |
| 1268 | } else |
| 1269 | return NOTIFY_DONE; |
| 1270 | |
Pablo Neira Ayuso | b3a27bf | 2006-08-22 00:32:05 -0700 | [diff] [blame] | 1271 | if (!nfnetlink_has_listeners(NFNLGRP_CONNTRACK_EXP_NEW)) |
| 1272 | return NOTIFY_DONE; |
| 1273 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1274 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC); |
| 1275 | if (!skb) |
| 1276 | return NOTIFY_DONE; |
| 1277 | |
| 1278 | b = skb->tail; |
| 1279 | |
Marcus Sundberg | b633ad5 | 2006-02-04 02:11:09 -0800 | [diff] [blame] | 1280 | type |= NFNL_SUBSYS_CTNETLINK_EXP << 8; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1281 | nlh = NLMSG_PUT(skb, 0, 0, type, sizeof(struct nfgenmsg)); |
| 1282 | nfmsg = NLMSG_DATA(nlh); |
| 1283 | |
| 1284 | nlh->nlmsg_flags = flags; |
| 1285 | nfmsg->nfgen_family = exp->tuple.src.l3num; |
| 1286 | nfmsg->version = NFNETLINK_V0; |
| 1287 | nfmsg->res_id = 0; |
| 1288 | |
| 1289 | if (ctnetlink_exp_dump_expect(skb, exp) < 0) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1290 | goto nla_put_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1291 | |
| 1292 | nlh->nlmsg_len = skb->tail - b; |
| 1293 | nfnetlink_send(skb, 0, NFNLGRP_CONNTRACK_EXP_NEW, 0); |
| 1294 | return NOTIFY_DONE; |
| 1295 | |
| 1296 | nlmsg_failure: |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1297 | nla_put_failure: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1298 | kfree_skb(skb); |
| 1299 | return NOTIFY_DONE; |
| 1300 | } |
| 1301 | #endif |
Patrick McHardy | cf6994c | 2007-07-07 22:32:34 -0700 | [diff] [blame] | 1302 | static int ctnetlink_exp_done(struct netlink_callback *cb) |
| 1303 | { |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 1304 | if (cb->args[1]) |
| 1305 | nf_ct_expect_put((struct nf_conntrack_expect *)cb->args[1]); |
Patrick McHardy | cf6994c | 2007-07-07 22:32:34 -0700 | [diff] [blame] | 1306 | return 0; |
| 1307 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1308 | |
| 1309 | static int |
| 1310 | ctnetlink_exp_dump_table(struct sk_buff *skb, struct netlink_callback *cb) |
| 1311 | { |
Patrick McHardy | cf6994c | 2007-07-07 22:32:34 -0700 | [diff] [blame] | 1312 | struct nf_conntrack_expect *exp, *last; |
Pablo Neira Ayuso | 87711cb | 2006-01-05 12:19:23 -0800 | [diff] [blame] | 1313 | struct nfgenmsg *nfmsg = NLMSG_DATA(cb->nlh); |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 1314 | struct hlist_node *n; |
Pablo Neira Ayuso | 87711cb | 2006-01-05 12:19:23 -0800 | [diff] [blame] | 1315 | u_int8_t l3proto = nfmsg->nfgen_family; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1316 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1317 | read_lock_bh(&nf_conntrack_lock); |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 1318 | last = (struct nf_conntrack_expect *)cb->args[1]; |
| 1319 | for (; cb->args[0] < nf_ct_expect_hsize; cb->args[0]++) { |
Patrick McHardy | cf6994c | 2007-07-07 22:32:34 -0700 | [diff] [blame] | 1320 | restart: |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 1321 | hlist_for_each_entry(exp, n, &nf_ct_expect_hash[cb->args[0]], |
| 1322 | hnode) { |
| 1323 | if (l3proto && exp->tuple.src.l3num != l3proto) |
Patrick McHardy | cf6994c | 2007-07-07 22:32:34 -0700 | [diff] [blame] | 1324 | continue; |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 1325 | if (cb->args[1]) { |
| 1326 | if (exp != last) |
| 1327 | continue; |
| 1328 | cb->args[1] = 0; |
| 1329 | } |
| 1330 | if (ctnetlink_exp_fill_info(skb, NETLINK_CB(cb->skb).pid, |
| 1331 | cb->nlh->nlmsg_seq, |
| 1332 | IPCTNL_MSG_EXP_NEW, |
| 1333 | 1, exp) < 0) { |
| 1334 | atomic_inc(&exp->use); |
| 1335 | cb->args[1] = (unsigned long)exp; |
| 1336 | goto out; |
| 1337 | } |
Patrick McHardy | cf6994c | 2007-07-07 22:32:34 -0700 | [diff] [blame] | 1338 | } |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 1339 | if (cb->args[1]) { |
| 1340 | cb->args[1] = 0; |
| 1341 | goto restart; |
Patrick McHardy | cf6994c | 2007-07-07 22:32:34 -0700 | [diff] [blame] | 1342 | } |
| 1343 | } |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1344 | out: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1345 | read_unlock_bh(&nf_conntrack_lock); |
Patrick McHardy | cf6994c | 2007-07-07 22:32:34 -0700 | [diff] [blame] | 1346 | if (last) |
| 1347 | nf_ct_expect_put(last); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1348 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1349 | return skb->len; |
| 1350 | } |
| 1351 | |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 1352 | static const struct nla_policy exp_nla_policy[CTA_EXPECT_MAX+1] = { |
| 1353 | [CTA_EXPECT_TIMEOUT] = { .type = NLA_U32 }, |
| 1354 | [CTA_EXPECT_ID] = { .type = NLA_U32 }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1355 | }; |
| 1356 | |
| 1357 | static int |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1358 | ctnetlink_get_expect(struct sock *ctnl, struct sk_buff *skb, |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1359 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1360 | { |
| 1361 | struct nf_conntrack_tuple tuple; |
| 1362 | struct nf_conntrack_expect *exp; |
| 1363 | struct sk_buff *skb2; |
| 1364 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); |
| 1365 | u_int8_t u3 = nfmsg->nfgen_family; |
| 1366 | int err = 0; |
| 1367 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1368 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
Thomas Graf | c702e80 | 2007-03-22 23:30:55 -0700 | [diff] [blame] | 1369 | return netlink_dump_start(ctnl, skb, nlh, |
| 1370 | ctnetlink_exp_dump_table, |
Patrick McHardy | cf6994c | 2007-07-07 22:32:34 -0700 | [diff] [blame] | 1371 | ctnetlink_exp_done); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1372 | } |
| 1373 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1374 | if (cda[CTA_EXPECT_MASTER]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1375 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_MASTER, u3); |
| 1376 | else |
| 1377 | return -EINVAL; |
| 1378 | |
| 1379 | if (err < 0) |
| 1380 | return err; |
| 1381 | |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 1382 | exp = nf_ct_expect_find_get(&tuple); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1383 | if (!exp) |
| 1384 | return -ENOENT; |
| 1385 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1386 | if (cda[CTA_EXPECT_ID]) { |
| 1387 | __be32 id = *(__be32 *)nla_data(cda[CTA_EXPECT_ID]); |
Patrick McHardy | 3583240 | 2007-09-28 14:41:50 -0700 | [diff] [blame] | 1388 | if (ntohl(id) != (u32)(unsigned long)exp) { |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 1389 | nf_ct_expect_put(exp); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1390 | return -ENOENT; |
| 1391 | } |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1392 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1393 | |
| 1394 | err = -ENOMEM; |
| 1395 | skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); |
| 1396 | if (!skb2) |
| 1397 | goto out; |
Thomas Graf | 4e9b826 | 2006-11-27 09:25:58 -0800 | [diff] [blame] | 1398 | |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1399 | err = ctnetlink_exp_fill_info(skb2, NETLINK_CB(skb).pid, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1400 | nlh->nlmsg_seq, IPCTNL_MSG_EXP_NEW, |
| 1401 | 1, exp); |
| 1402 | if (err <= 0) |
| 1403 | goto free; |
| 1404 | |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 1405 | nf_ct_expect_put(exp); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1406 | |
| 1407 | return netlink_unicast(ctnl, skb2, NETLINK_CB(skb).pid, MSG_DONTWAIT); |
| 1408 | |
| 1409 | free: |
| 1410 | kfree_skb(skb2); |
| 1411 | out: |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 1412 | nf_ct_expect_put(exp); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1413 | return err; |
| 1414 | } |
| 1415 | |
| 1416 | static int |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1417 | ctnetlink_del_expect(struct sock *ctnl, struct sk_buff *skb, |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1418 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1419 | { |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 1420 | struct nf_conntrack_expect *exp; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1421 | struct nf_conntrack_tuple tuple; |
| 1422 | struct nf_conntrack_helper *h; |
| 1423 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 1424 | struct hlist_node *n, *next; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1425 | u_int8_t u3 = nfmsg->nfgen_family; |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 1426 | unsigned int i; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1427 | int err; |
| 1428 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1429 | if (cda[CTA_EXPECT_TUPLE]) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1430 | /* delete a single expect by tuple */ |
| 1431 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); |
| 1432 | if (err < 0) |
| 1433 | return err; |
| 1434 | |
| 1435 | /* bump usage count to 2 */ |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 1436 | exp = nf_ct_expect_find_get(&tuple); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1437 | if (!exp) |
| 1438 | return -ENOENT; |
| 1439 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1440 | if (cda[CTA_EXPECT_ID]) { |
| 1441 | __be32 id = *(__be32 *)nla_data(cda[CTA_EXPECT_ID]); |
Patrick McHardy | 3583240 | 2007-09-28 14:41:50 -0700 | [diff] [blame] | 1442 | if (ntohl(id) != (u32)(unsigned long)exp) { |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 1443 | nf_ct_expect_put(exp); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1444 | return -ENOENT; |
| 1445 | } |
| 1446 | } |
| 1447 | |
| 1448 | /* after list removal, usage count == 1 */ |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 1449 | nf_ct_unexpect_related(exp); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1450 | /* have to put what we 'get' above. |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1451 | * after this line usage count == 0 */ |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 1452 | nf_ct_expect_put(exp); |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1453 | } else if (cda[CTA_EXPECT_HELP_NAME]) { |
| 1454 | char *name = nla_data(cda[CTA_EXPECT_HELP_NAME]); |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 1455 | struct nf_conn_help *m_help; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1456 | |
| 1457 | /* delete all expectations for this helper */ |
| 1458 | write_lock_bh(&nf_conntrack_lock); |
| 1459 | h = __nf_conntrack_helper_find_byname(name); |
| 1460 | if (!h) { |
| 1461 | write_unlock_bh(&nf_conntrack_lock); |
| 1462 | return -EINVAL; |
| 1463 | } |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 1464 | for (i = 0; i < nf_ct_expect_hsize; i++) { |
| 1465 | hlist_for_each_entry_safe(exp, n, next, |
| 1466 | &nf_ct_expect_hash[i], |
| 1467 | hnode) { |
| 1468 | m_help = nfct_help(exp->master); |
| 1469 | if (m_help->helper == h |
| 1470 | && del_timer(&exp->timeout)) { |
| 1471 | nf_ct_unlink_expect(exp); |
| 1472 | nf_ct_expect_put(exp); |
| 1473 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1474 | } |
| 1475 | } |
| 1476 | write_unlock_bh(&nf_conntrack_lock); |
| 1477 | } else { |
| 1478 | /* This basically means we have to flush everything*/ |
| 1479 | write_lock_bh(&nf_conntrack_lock); |
Patrick McHardy | 31f1587 | 2007-07-07 22:35:21 -0700 | [diff] [blame] | 1480 | for (i = 0; i < nf_ct_expect_hsize; i++) { |
| 1481 | hlist_for_each_entry_safe(exp, n, next, |
| 1482 | &nf_ct_expect_hash[i], |
| 1483 | hnode) { |
| 1484 | if (del_timer(&exp->timeout)) { |
| 1485 | nf_ct_unlink_expect(exp); |
| 1486 | nf_ct_expect_put(exp); |
| 1487 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1488 | } |
| 1489 | } |
| 1490 | write_unlock_bh(&nf_conntrack_lock); |
| 1491 | } |
| 1492 | |
| 1493 | return 0; |
| 1494 | } |
| 1495 | static int |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1496 | ctnetlink_change_expect(struct nf_conntrack_expect *x, struct nlattr *cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1497 | { |
| 1498 | return -EOPNOTSUPP; |
| 1499 | } |
| 1500 | |
| 1501 | static int |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1502 | ctnetlink_create_expect(struct nlattr *cda[], u_int8_t u3) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1503 | { |
| 1504 | struct nf_conntrack_tuple tuple, mask, master_tuple; |
| 1505 | struct nf_conntrack_tuple_hash *h = NULL; |
| 1506 | struct nf_conntrack_expect *exp; |
| 1507 | struct nf_conn *ct; |
Harald Welte | dc808fe | 2006-03-20 17:56:32 -0800 | [diff] [blame] | 1508 | struct nf_conn_help *help; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1509 | int err = 0; |
| 1510 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1511 | /* caller guarantees that those three CTA_EXPECT_* exist */ |
| 1512 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); |
| 1513 | if (err < 0) |
| 1514 | return err; |
| 1515 | err = ctnetlink_parse_tuple(cda, &mask, CTA_EXPECT_MASK, u3); |
| 1516 | if (err < 0) |
| 1517 | return err; |
| 1518 | err = ctnetlink_parse_tuple(cda, &master_tuple, CTA_EXPECT_MASTER, u3); |
| 1519 | if (err < 0) |
| 1520 | return err; |
| 1521 | |
| 1522 | /* Look for master conntrack of this expectation */ |
Patrick McHardy | 330f7db | 2007-07-07 22:28:42 -0700 | [diff] [blame] | 1523 | h = nf_conntrack_find_get(&master_tuple); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1524 | if (!h) |
| 1525 | return -ENOENT; |
| 1526 | ct = nf_ct_tuplehash_to_ctrack(h); |
Harald Welte | dc808fe | 2006-03-20 17:56:32 -0800 | [diff] [blame] | 1527 | help = nfct_help(ct); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1528 | |
Harald Welte | dc808fe | 2006-03-20 17:56:32 -0800 | [diff] [blame] | 1529 | if (!help || !help->helper) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1530 | /* such conntrack hasn't got any helper, abort */ |
| 1531 | err = -EINVAL; |
| 1532 | goto out; |
| 1533 | } |
| 1534 | |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 1535 | exp = nf_ct_expect_alloc(ct); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1536 | if (!exp) { |
| 1537 | err = -ENOMEM; |
| 1538 | goto out; |
| 1539 | } |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1540 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1541 | exp->expectfn = NULL; |
| 1542 | exp->flags = 0; |
| 1543 | exp->master = ct; |
Patrick McHardy | 9457d85 | 2006-12-02 22:05:25 -0800 | [diff] [blame] | 1544 | exp->helper = NULL; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1545 | memcpy(&exp->tuple, &tuple, sizeof(struct nf_conntrack_tuple)); |
Patrick McHardy | d4156e8 | 2007-07-07 22:31:32 -0700 | [diff] [blame] | 1546 | memcpy(&exp->mask.src.u3, &mask.src.u3, sizeof(exp->mask.src.u3)); |
| 1547 | exp->mask.src.u.all = mask.src.u.all; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1548 | |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 1549 | err = nf_ct_expect_related(exp); |
| 1550 | nf_ct_expect_put(exp); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1551 | |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1552 | out: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1553 | nf_ct_put(nf_ct_tuplehash_to_ctrack(h)); |
| 1554 | return err; |
| 1555 | } |
| 1556 | |
| 1557 | static int |
| 1558 | ctnetlink_new_expect(struct sock *ctnl, struct sk_buff *skb, |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1559 | struct nlmsghdr *nlh, struct nlattr *cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1560 | { |
| 1561 | struct nf_conntrack_tuple tuple; |
| 1562 | struct nf_conntrack_expect *exp; |
| 1563 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); |
| 1564 | u_int8_t u3 = nfmsg->nfgen_family; |
| 1565 | int err = 0; |
| 1566 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 1567 | if (!cda[CTA_EXPECT_TUPLE] |
| 1568 | || !cda[CTA_EXPECT_MASK] |
| 1569 | || !cda[CTA_EXPECT_MASTER]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1570 | return -EINVAL; |
| 1571 | |
| 1572 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); |
| 1573 | if (err < 0) |
| 1574 | return err; |
| 1575 | |
| 1576 | write_lock_bh(&nf_conntrack_lock); |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 1577 | exp = __nf_ct_expect_find(&tuple); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1578 | |
| 1579 | if (!exp) { |
| 1580 | write_unlock_bh(&nf_conntrack_lock); |
| 1581 | err = -ENOENT; |
| 1582 | if (nlh->nlmsg_flags & NLM_F_CREATE) |
| 1583 | err = ctnetlink_create_expect(cda, u3); |
| 1584 | return err; |
| 1585 | } |
| 1586 | |
| 1587 | err = -EEXIST; |
| 1588 | if (!(nlh->nlmsg_flags & NLM_F_EXCL)) |
| 1589 | err = ctnetlink_change_expect(exp, cda); |
| 1590 | write_unlock_bh(&nf_conntrack_lock); |
| 1591 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1592 | return err; |
| 1593 | } |
| 1594 | |
| 1595 | #ifdef CONFIG_NF_CONNTRACK_EVENTS |
| 1596 | static struct notifier_block ctnl_notifier = { |
| 1597 | .notifier_call = ctnetlink_conntrack_event, |
| 1598 | }; |
| 1599 | |
| 1600 | static struct notifier_block ctnl_notifier_exp = { |
| 1601 | .notifier_call = ctnetlink_expect_event, |
| 1602 | }; |
| 1603 | #endif |
| 1604 | |
Patrick McHardy | 7c8d4cb | 2007-09-28 14:15:45 -0700 | [diff] [blame] | 1605 | static const struct nfnl_callback ctnl_cb[IPCTNL_MSG_MAX] = { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1606 | [IPCTNL_MSG_CT_NEW] = { .call = ctnetlink_new_conntrack, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 1607 | .attr_count = CTA_MAX, |
| 1608 | .policy = ct_nla_policy }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1609 | [IPCTNL_MSG_CT_GET] = { .call = ctnetlink_get_conntrack, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 1610 | .attr_count = CTA_MAX, |
| 1611 | .policy = ct_nla_policy }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1612 | [IPCTNL_MSG_CT_DELETE] = { .call = ctnetlink_del_conntrack, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 1613 | .attr_count = CTA_MAX, |
| 1614 | .policy = ct_nla_policy }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1615 | [IPCTNL_MSG_CT_GET_CTRZERO] = { .call = ctnetlink_get_conntrack, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 1616 | .attr_count = CTA_MAX, |
| 1617 | .policy = ct_nla_policy }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1618 | }; |
| 1619 | |
Patrick McHardy | 7c8d4cb | 2007-09-28 14:15:45 -0700 | [diff] [blame] | 1620 | 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] | 1621 | [IPCTNL_MSG_EXP_GET] = { .call = ctnetlink_get_expect, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 1622 | .attr_count = CTA_EXPECT_MAX, |
| 1623 | .policy = exp_nla_policy }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1624 | [IPCTNL_MSG_EXP_NEW] = { .call = ctnetlink_new_expect, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 1625 | .attr_count = CTA_EXPECT_MAX, |
| 1626 | .policy = exp_nla_policy }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1627 | [IPCTNL_MSG_EXP_DELETE] = { .call = ctnetlink_del_expect, |
Patrick McHardy | f73e924 | 2007-09-28 14:39:55 -0700 | [diff] [blame] | 1628 | .attr_count = CTA_EXPECT_MAX, |
| 1629 | .policy = exp_nla_policy }, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1630 | }; |
| 1631 | |
Patrick McHardy | 7c8d4cb | 2007-09-28 14:15:45 -0700 | [diff] [blame] | 1632 | static const struct nfnetlink_subsystem ctnl_subsys = { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1633 | .name = "conntrack", |
| 1634 | .subsys_id = NFNL_SUBSYS_CTNETLINK, |
| 1635 | .cb_count = IPCTNL_MSG_MAX, |
| 1636 | .cb = ctnl_cb, |
| 1637 | }; |
| 1638 | |
Patrick McHardy | 7c8d4cb | 2007-09-28 14:15:45 -0700 | [diff] [blame] | 1639 | static const struct nfnetlink_subsystem ctnl_exp_subsys = { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1640 | .name = "conntrack_expect", |
| 1641 | .subsys_id = NFNL_SUBSYS_CTNETLINK_EXP, |
| 1642 | .cb_count = IPCTNL_MSG_EXP_MAX, |
| 1643 | .cb = ctnl_exp_cb, |
| 1644 | }; |
| 1645 | |
Patrick McHardy | d2483dd | 2006-12-02 22:06:05 -0800 | [diff] [blame] | 1646 | MODULE_ALIAS("ip_conntrack_netlink"); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1647 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK); |
Pablo Neira Ayuso | 34f9a2e | 2006-02-04 02:11:41 -0800 | [diff] [blame] | 1648 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK_EXP); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1649 | |
| 1650 | static int __init ctnetlink_init(void) |
| 1651 | { |
| 1652 | int ret; |
| 1653 | |
| 1654 | printk("ctnetlink v%s: registering with nfnetlink.\n", version); |
| 1655 | ret = nfnetlink_subsys_register(&ctnl_subsys); |
| 1656 | if (ret < 0) { |
| 1657 | printk("ctnetlink_init: cannot register with nfnetlink.\n"); |
| 1658 | goto err_out; |
| 1659 | } |
| 1660 | |
| 1661 | ret = nfnetlink_subsys_register(&ctnl_exp_subsys); |
| 1662 | if (ret < 0) { |
| 1663 | printk("ctnetlink_init: cannot register exp with nfnetlink.\n"); |
| 1664 | goto err_unreg_subsys; |
| 1665 | } |
| 1666 | |
| 1667 | #ifdef CONFIG_NF_CONNTRACK_EVENTS |
| 1668 | ret = nf_conntrack_register_notifier(&ctnl_notifier); |
| 1669 | if (ret < 0) { |
| 1670 | printk("ctnetlink_init: cannot register notifier.\n"); |
| 1671 | goto err_unreg_exp_subsys; |
| 1672 | } |
| 1673 | |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 1674 | ret = nf_ct_expect_register_notifier(&ctnl_notifier_exp); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1675 | if (ret < 0) { |
| 1676 | printk("ctnetlink_init: cannot expect register notifier.\n"); |
| 1677 | goto err_unreg_notifier; |
| 1678 | } |
| 1679 | #endif |
| 1680 | |
| 1681 | return 0; |
| 1682 | |
| 1683 | #ifdef CONFIG_NF_CONNTRACK_EVENTS |
| 1684 | err_unreg_notifier: |
| 1685 | nf_conntrack_unregister_notifier(&ctnl_notifier); |
| 1686 | err_unreg_exp_subsys: |
| 1687 | nfnetlink_subsys_unregister(&ctnl_exp_subsys); |
| 1688 | #endif |
| 1689 | err_unreg_subsys: |
| 1690 | nfnetlink_subsys_unregister(&ctnl_subsys); |
| 1691 | err_out: |
| 1692 | return ret; |
| 1693 | } |
| 1694 | |
| 1695 | static void __exit ctnetlink_exit(void) |
| 1696 | { |
| 1697 | printk("ctnetlink: unregistering from nfnetlink.\n"); |
| 1698 | |
| 1699 | #ifdef CONFIG_NF_CONNTRACK_EVENTS |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 1700 | nf_ct_expect_unregister_notifier(&ctnl_notifier_exp); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1701 | nf_conntrack_unregister_notifier(&ctnl_notifier); |
| 1702 | #endif |
| 1703 | |
| 1704 | nfnetlink_subsys_unregister(&ctnl_exp_subsys); |
| 1705 | nfnetlink_subsys_unregister(&ctnl_subsys); |
| 1706 | return; |
| 1707 | } |
| 1708 | |
| 1709 | module_init(ctnetlink_init); |
| 1710 | module_exit(ctnetlink_exit); |