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 | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 7 | * (C) 2005-2006 by Pablo Neira Ayuso <pablo@eurodev.net> |
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; |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 57 | struct nfattr *nest_parms = NFA_NEST(skb, CTA_TUPLE_PROTO); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 58 | |
| 59 | NFA_PUT(skb, CTA_PROTO_NUM, sizeof(u_int8_t), &tuple->dst.protonum); |
| 60 | |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 61 | if (likely(l4proto->tuple_to_nfattr)) |
| 62 | ret = l4proto->tuple_to_nfattr(skb, tuple); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 63 | |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 64 | NFA_NEST_END(skb, nest_parms); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 65 | |
| 66 | return ret; |
| 67 | |
| 68 | nfattr_failure: |
| 69 | return -1; |
| 70 | } |
| 71 | |
| 72 | static inline int |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 73 | ctnetlink_dump_tuples_ip(struct sk_buff *skb, |
| 74 | const struct nf_conntrack_tuple *tuple, |
| 75 | struct nf_conntrack_l3proto *l3proto) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 76 | { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 77 | int ret = 0; |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 78 | struct nfattr *nest_parms = NFA_NEST(skb, CTA_TUPLE_IP); |
| 79 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 80 | if (likely(l3proto->tuple_to_nfattr)) |
| 81 | ret = l3proto->tuple_to_nfattr(skb, tuple); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 82 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 83 | NFA_NEST_END(skb, nest_parms); |
| 84 | |
| 85 | return ret; |
| 86 | |
| 87 | nfattr_failure: |
| 88 | return -1; |
| 89 | } |
| 90 | |
| 91 | static inline int |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 92 | ctnetlink_dump_tuples(struct sk_buff *skb, |
| 93 | const struct nf_conntrack_tuple *tuple) |
| 94 | { |
| 95 | int ret; |
| 96 | struct nf_conntrack_l3proto *l3proto; |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 97 | struct nf_conntrack_l4proto *l4proto; |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 98 | |
| 99 | l3proto = nf_ct_l3proto_find_get(tuple->src.l3num); |
| 100 | ret = ctnetlink_dump_tuples_ip(skb, tuple, l3proto); |
| 101 | nf_ct_l3proto_put(l3proto); |
| 102 | |
| 103 | if (unlikely(ret < 0)) |
| 104 | return ret; |
| 105 | |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 106 | l4proto = nf_ct_l4proto_find_get(tuple->src.l3num, tuple->dst.protonum); |
| 107 | ret = ctnetlink_dump_tuples_proto(skb, tuple, l4proto); |
| 108 | nf_ct_l4proto_put(l4proto); |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 109 | |
| 110 | return ret; |
| 111 | } |
| 112 | |
| 113 | static inline int |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 114 | ctnetlink_dump_status(struct sk_buff *skb, const struct nf_conn *ct) |
| 115 | { |
Patrick McHardy | bff9a89 | 2006-12-02 22:05:08 -0800 | [diff] [blame] | 116 | __be32 status = htonl((u_int32_t) ct->status); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 117 | NFA_PUT(skb, CTA_STATUS, sizeof(status), &status); |
| 118 | return 0; |
| 119 | |
| 120 | nfattr_failure: |
| 121 | return -1; |
| 122 | } |
| 123 | |
| 124 | static inline int |
| 125 | ctnetlink_dump_timeout(struct sk_buff *skb, const struct nf_conn *ct) |
| 126 | { |
| 127 | long timeout_l = ct->timeout.expires - jiffies; |
Patrick McHardy | bff9a89 | 2006-12-02 22:05:08 -0800 | [diff] [blame] | 128 | __be32 timeout; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 129 | |
| 130 | if (timeout_l < 0) |
| 131 | timeout = 0; |
| 132 | else |
| 133 | timeout = htonl(timeout_l / HZ); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 134 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 135 | NFA_PUT(skb, CTA_TIMEOUT, sizeof(timeout), &timeout); |
| 136 | return 0; |
| 137 | |
| 138 | nfattr_failure: |
| 139 | return -1; |
| 140 | } |
| 141 | |
| 142 | static inline int |
| 143 | ctnetlink_dump_protoinfo(struct sk_buff *skb, const struct nf_conn *ct) |
| 144 | { |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 145 | 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); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 146 | struct nfattr *nest_proto; |
| 147 | int ret; |
| 148 | |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 149 | if (!l4proto->to_nfattr) { |
| 150 | nf_ct_l4proto_put(l4proto); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 151 | return 0; |
| 152 | } |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 153 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 154 | nest_proto = NFA_NEST(skb, CTA_PROTOINFO); |
| 155 | |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 156 | ret = l4proto->to_nfattr(skb, nest_proto, ct); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 157 | |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 158 | nf_ct_l4proto_put(l4proto); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 159 | |
| 160 | NFA_NEST_END(skb, nest_proto); |
| 161 | |
| 162 | return ret; |
| 163 | |
| 164 | nfattr_failure: |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 165 | nf_ct_l4proto_put(l4proto); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 166 | return -1; |
| 167 | } |
| 168 | |
| 169 | static inline int |
| 170 | ctnetlink_dump_helpinfo(struct sk_buff *skb, const struct nf_conn *ct) |
| 171 | { |
| 172 | struct nfattr *nest_helper; |
Harald Welte | dc808fe | 2006-03-20 17:56:32 -0800 | [diff] [blame] | 173 | const struct nf_conn_help *help = nfct_help(ct); |
Patrick McHarrdy | 3c158f7 | 2007-06-05 12:55:27 -0700 | [diff] [blame] | 174 | struct nf_conntrack_helper *helper; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 175 | |
Patrick McHarrdy | 3c158f7 | 2007-06-05 12:55:27 -0700 | [diff] [blame] | 176 | if (!help) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 177 | return 0; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 178 | |
Patrick McHarrdy | 3c158f7 | 2007-06-05 12:55:27 -0700 | [diff] [blame] | 179 | rcu_read_lock(); |
| 180 | helper = rcu_dereference(help->helper); |
| 181 | if (!helper) |
| 182 | goto out; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 183 | |
Patrick McHarrdy | 3c158f7 | 2007-06-05 12:55:27 -0700 | [diff] [blame] | 184 | nest_helper = NFA_NEST(skb, CTA_HELP); |
| 185 | NFA_PUT(skb, CTA_HELP_NAME, strlen(helper->name), helper->name); |
| 186 | |
| 187 | if (helper->to_nfattr) |
| 188 | helper->to_nfattr(skb, ct); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 189 | |
| 190 | NFA_NEST_END(skb, nest_helper); |
Patrick McHarrdy | 3c158f7 | 2007-06-05 12:55:27 -0700 | [diff] [blame] | 191 | out: |
| 192 | rcu_read_unlock(); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 193 | return 0; |
| 194 | |
| 195 | nfattr_failure: |
Patrick McHarrdy | 3c158f7 | 2007-06-05 12:55:27 -0700 | [diff] [blame] | 196 | rcu_read_unlock(); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 197 | return -1; |
| 198 | } |
| 199 | |
| 200 | #ifdef CONFIG_NF_CT_ACCT |
| 201 | static inline int |
| 202 | ctnetlink_dump_counters(struct sk_buff *skb, const struct nf_conn *ct, |
| 203 | enum ip_conntrack_dir dir) |
| 204 | { |
| 205 | enum ctattr_type type = dir ? CTA_COUNTERS_REPLY: CTA_COUNTERS_ORIG; |
| 206 | struct nfattr *nest_count = NFA_NEST(skb, type); |
Patrick McHardy | bff9a89 | 2006-12-02 22:05:08 -0800 | [diff] [blame] | 207 | __be32 tmp; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 208 | |
| 209 | tmp = htonl(ct->counters[dir].packets); |
| 210 | NFA_PUT(skb, CTA_COUNTERS32_PACKETS, sizeof(u_int32_t), &tmp); |
| 211 | |
| 212 | tmp = htonl(ct->counters[dir].bytes); |
| 213 | NFA_PUT(skb, CTA_COUNTERS32_BYTES, sizeof(u_int32_t), &tmp); |
| 214 | |
| 215 | NFA_NEST_END(skb, nest_count); |
| 216 | |
| 217 | return 0; |
| 218 | |
| 219 | nfattr_failure: |
| 220 | return -1; |
| 221 | } |
| 222 | #else |
| 223 | #define ctnetlink_dump_counters(a, b, c) (0) |
| 224 | #endif |
| 225 | |
| 226 | #ifdef CONFIG_NF_CONNTRACK_MARK |
| 227 | static inline int |
| 228 | ctnetlink_dump_mark(struct sk_buff *skb, const struct nf_conn *ct) |
| 229 | { |
Patrick McHardy | bff9a89 | 2006-12-02 22:05:08 -0800 | [diff] [blame] | 230 | __be32 mark = htonl(ct->mark); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 231 | |
| 232 | NFA_PUT(skb, CTA_MARK, sizeof(u_int32_t), &mark); |
| 233 | return 0; |
| 234 | |
| 235 | nfattr_failure: |
| 236 | return -1; |
| 237 | } |
| 238 | #else |
| 239 | #define ctnetlink_dump_mark(a, b) (0) |
| 240 | #endif |
| 241 | |
| 242 | static inline int |
| 243 | ctnetlink_dump_id(struct sk_buff *skb, const struct nf_conn *ct) |
| 244 | { |
Patrick McHardy | bff9a89 | 2006-12-02 22:05:08 -0800 | [diff] [blame] | 245 | __be32 id = htonl(ct->id); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 246 | NFA_PUT(skb, CTA_ID, sizeof(u_int32_t), &id); |
| 247 | return 0; |
| 248 | |
| 249 | nfattr_failure: |
| 250 | return -1; |
| 251 | } |
| 252 | |
| 253 | static inline int |
| 254 | ctnetlink_dump_use(struct sk_buff *skb, const struct nf_conn *ct) |
| 255 | { |
Patrick McHardy | bff9a89 | 2006-12-02 22:05:08 -0800 | [diff] [blame] | 256 | __be32 use = htonl(atomic_read(&ct->ct_general.use)); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 257 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 258 | NFA_PUT(skb, CTA_USE, sizeof(u_int32_t), &use); |
| 259 | return 0; |
| 260 | |
| 261 | nfattr_failure: |
| 262 | return -1; |
| 263 | } |
| 264 | |
| 265 | #define tuple(ct, dir) (&(ct)->tuplehash[dir].tuple) |
| 266 | |
| 267 | static int |
| 268 | ctnetlink_fill_info(struct sk_buff *skb, u32 pid, u32 seq, |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 269 | int event, int nowait, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 270 | const struct nf_conn *ct) |
| 271 | { |
| 272 | struct nlmsghdr *nlh; |
| 273 | struct nfgenmsg *nfmsg; |
| 274 | struct nfattr *nest_parms; |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 275 | unsigned char *b = skb_tail_pointer(skb); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 276 | |
| 277 | event |= NFNL_SUBSYS_CTNETLINK << 8; |
| 278 | nlh = NLMSG_PUT(skb, pid, seq, event, sizeof(struct nfgenmsg)); |
| 279 | nfmsg = NLMSG_DATA(nlh); |
| 280 | |
| 281 | nlh->nlmsg_flags = (nowait && pid) ? NLM_F_MULTI : 0; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 282 | nfmsg->nfgen_family = |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 283 | ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.l3num; |
| 284 | nfmsg->version = NFNETLINK_V0; |
| 285 | nfmsg->res_id = 0; |
| 286 | |
| 287 | nest_parms = NFA_NEST(skb, CTA_TUPLE_ORIG); |
| 288 | if (ctnetlink_dump_tuples(skb, tuple(ct, IP_CT_DIR_ORIGINAL)) < 0) |
| 289 | goto nfattr_failure; |
| 290 | NFA_NEST_END(skb, nest_parms); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 291 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 292 | nest_parms = NFA_NEST(skb, CTA_TUPLE_REPLY); |
| 293 | if (ctnetlink_dump_tuples(skb, tuple(ct, IP_CT_DIR_REPLY)) < 0) |
| 294 | goto nfattr_failure; |
| 295 | NFA_NEST_END(skb, nest_parms); |
| 296 | |
| 297 | if (ctnetlink_dump_status(skb, ct) < 0 || |
| 298 | ctnetlink_dump_timeout(skb, ct) < 0 || |
| 299 | ctnetlink_dump_counters(skb, ct, IP_CT_DIR_ORIGINAL) < 0 || |
| 300 | ctnetlink_dump_counters(skb, ct, IP_CT_DIR_REPLY) < 0 || |
| 301 | ctnetlink_dump_protoinfo(skb, ct) < 0 || |
| 302 | ctnetlink_dump_helpinfo(skb, ct) < 0 || |
| 303 | ctnetlink_dump_mark(skb, ct) < 0 || |
| 304 | ctnetlink_dump_id(skb, ct) < 0 || |
| 305 | ctnetlink_dump_use(skb, ct) < 0) |
| 306 | goto nfattr_failure; |
| 307 | |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 308 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 309 | return skb->len; |
| 310 | |
| 311 | nlmsg_failure: |
| 312 | nfattr_failure: |
Arnaldo Carvalho de Melo | dc5fc57 | 2007-03-25 23:06:12 -0700 | [diff] [blame] | 313 | nlmsg_trim(skb, b); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 314 | return -1; |
| 315 | } |
| 316 | |
| 317 | #ifdef CONFIG_NF_CONNTRACK_EVENTS |
| 318 | static int ctnetlink_conntrack_event(struct notifier_block *this, |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 319 | unsigned long events, void *ptr) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 320 | { |
| 321 | struct nlmsghdr *nlh; |
| 322 | struct nfgenmsg *nfmsg; |
| 323 | struct nfattr *nest_parms; |
| 324 | struct nf_conn *ct = (struct nf_conn *)ptr; |
| 325 | struct sk_buff *skb; |
| 326 | unsigned int type; |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 327 | sk_buff_data_t b; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 328 | unsigned int flags = 0, group; |
| 329 | |
| 330 | /* ignore our fake conntrack entry */ |
| 331 | if (ct == &nf_conntrack_untracked) |
| 332 | return NOTIFY_DONE; |
| 333 | |
| 334 | if (events & IPCT_DESTROY) { |
| 335 | type = IPCTNL_MSG_CT_DELETE; |
| 336 | group = NFNLGRP_CONNTRACK_DESTROY; |
| 337 | } else if (events & (IPCT_NEW | IPCT_RELATED)) { |
| 338 | type = IPCTNL_MSG_CT_NEW; |
| 339 | flags = NLM_F_CREATE|NLM_F_EXCL; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 340 | group = NFNLGRP_CONNTRACK_NEW; |
Pablo Neira Ayuso | 1a31526 | 2006-08-22 00:32:23 -0700 | [diff] [blame] | 341 | } else if (events & (IPCT_STATUS | IPCT_PROTOINFO)) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 342 | type = IPCTNL_MSG_CT_NEW; |
| 343 | group = NFNLGRP_CONNTRACK_UPDATE; |
| 344 | } else |
| 345 | return NOTIFY_DONE; |
Patrick McHardy | a242769 | 2006-03-20 18:03:59 -0800 | [diff] [blame] | 346 | |
| 347 | if (!nfnetlink_has_listeners(group)) |
| 348 | return NOTIFY_DONE; |
| 349 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 350 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC); |
| 351 | if (!skb) |
| 352 | return NOTIFY_DONE; |
| 353 | |
| 354 | b = skb->tail; |
| 355 | |
| 356 | type |= NFNL_SUBSYS_CTNETLINK << 8; |
| 357 | nlh = NLMSG_PUT(skb, 0, 0, type, sizeof(struct nfgenmsg)); |
| 358 | nfmsg = NLMSG_DATA(nlh); |
| 359 | |
| 360 | nlh->nlmsg_flags = flags; |
| 361 | nfmsg->nfgen_family = ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.l3num; |
| 362 | nfmsg->version = NFNETLINK_V0; |
| 363 | nfmsg->res_id = 0; |
| 364 | |
| 365 | nest_parms = NFA_NEST(skb, CTA_TUPLE_ORIG); |
| 366 | if (ctnetlink_dump_tuples(skb, tuple(ct, IP_CT_DIR_ORIGINAL)) < 0) |
| 367 | goto nfattr_failure; |
| 368 | NFA_NEST_END(skb, nest_parms); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 369 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 370 | nest_parms = NFA_NEST(skb, CTA_TUPLE_REPLY); |
| 371 | if (ctnetlink_dump_tuples(skb, tuple(ct, IP_CT_DIR_REPLY)) < 0) |
| 372 | goto nfattr_failure; |
| 373 | NFA_NEST_END(skb, nest_parms); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 374 | |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 375 | if (events & IPCT_DESTROY) { |
| 376 | if (ctnetlink_dump_counters(skb, ct, IP_CT_DIR_ORIGINAL) < 0 || |
| 377 | ctnetlink_dump_counters(skb, ct, IP_CT_DIR_REPLY) < 0) |
| 378 | goto nfattr_failure; |
| 379 | } else { |
| 380 | if (ctnetlink_dump_status(skb, ct) < 0) |
| 381 | goto nfattr_failure; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 382 | |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 383 | if (ctnetlink_dump_timeout(skb, ct) < 0) |
| 384 | goto nfattr_failure; |
| 385 | |
| 386 | if (events & IPCT_PROTOINFO |
| 387 | && ctnetlink_dump_protoinfo(skb, ct) < 0) |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 388 | goto nfattr_failure; |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 389 | |
| 390 | if ((events & IPCT_HELPER || nfct_help(ct)) |
| 391 | && ctnetlink_dump_helpinfo(skb, ct) < 0) |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 392 | goto nfattr_failure; |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 393 | |
Patrick McHardy | 40e0cb0 | 2007-02-02 19:33:11 -0800 | [diff] [blame] | 394 | #ifdef CONFIG_NF_CONNTRACK_MARK |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 395 | if ((events & IPCT_MARK || ct->mark) |
| 396 | && ctnetlink_dump_mark(skb, ct) < 0) |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 397 | goto nfattr_failure; |
Patrick McHardy | 40e0cb0 | 2007-02-02 19:33:11 -0800 | [diff] [blame] | 398 | #endif |
Pablo Neira Ayuso | 7b621c1 | 2006-11-29 02:35:32 +0100 | [diff] [blame] | 399 | |
| 400 | if (events & IPCT_COUNTER_FILLING && |
| 401 | (ctnetlink_dump_counters(skb, ct, IP_CT_DIR_ORIGINAL) < 0 || |
| 402 | ctnetlink_dump_counters(skb, ct, IP_CT_DIR_REPLY) < 0)) |
| 403 | goto nfattr_failure; |
| 404 | } |
Pablo Neira Ayuso | b9a37e0 | 2006-08-22 00:31:49 -0700 | [diff] [blame] | 405 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 406 | nlh->nlmsg_len = skb->tail - b; |
| 407 | nfnetlink_send(skb, 0, group, 0); |
| 408 | return NOTIFY_DONE; |
| 409 | |
| 410 | nlmsg_failure: |
| 411 | nfattr_failure: |
| 412 | kfree_skb(skb); |
| 413 | return NOTIFY_DONE; |
| 414 | } |
| 415 | #endif /* CONFIG_NF_CONNTRACK_EVENTS */ |
| 416 | |
| 417 | static int ctnetlink_done(struct netlink_callback *cb) |
| 418 | { |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 419 | if (cb->args[1]) |
| 420 | nf_ct_put((struct nf_conn *)cb->args[1]); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 421 | return 0; |
| 422 | } |
| 423 | |
Pablo Neira Ayuso | 87711cb | 2006-01-05 12:19:23 -0800 | [diff] [blame] | 424 | #define L3PROTO(ct) ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.l3num |
| 425 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 426 | static int |
| 427 | ctnetlink_dump_table(struct sk_buff *skb, struct netlink_callback *cb) |
| 428 | { |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 429 | struct nf_conn *ct, *last; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 430 | struct nf_conntrack_tuple_hash *h; |
Patrick McHardy | f205c5e | 2007-07-07 22:28:14 -0700 | [diff] [blame] | 431 | struct hlist_node *n; |
Pablo Neira Ayuso | 87711cb | 2006-01-05 12:19:23 -0800 | [diff] [blame] | 432 | struct nfgenmsg *nfmsg = NLMSG_DATA(cb->nlh); |
| 433 | u_int8_t l3proto = nfmsg->nfgen_family; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 434 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 435 | read_lock_bh(&nf_conntrack_lock); |
Patrick McHardy | d205dc4 | 2006-08-17 18:12:38 -0700 | [diff] [blame] | 436 | last = (struct nf_conn *)cb->args[1]; |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 437 | for (; cb->args[0] < nf_conntrack_htable_size; cb->args[0]++) { |
| 438 | restart: |
Patrick McHardy | f205c5e | 2007-07-07 22:28:14 -0700 | [diff] [blame] | 439 | hlist_for_each_entry(h, n, &nf_conntrack_hash[cb->args[0]], |
| 440 | hnode) { |
Jozsef Kadlecsik | 5b1158e | 2006-12-02 22:07:13 -0800 | [diff] [blame] | 441 | if (NF_CT_DIRECTION(h) != IP_CT_DIR_ORIGINAL) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 442 | continue; |
| 443 | ct = nf_ct_tuplehash_to_ctrack(h); |
Pablo Neira Ayuso | 87711cb | 2006-01-05 12:19:23 -0800 | [diff] [blame] | 444 | /* Dump entries of a given L3 protocol number. |
| 445 | * If it is not specified, ie. l3proto == 0, |
| 446 | * then dump everything. */ |
| 447 | if (l3proto && L3PROTO(ct) != l3proto) |
| 448 | continue; |
Patrick McHardy | d205dc4 | 2006-08-17 18:12:38 -0700 | [diff] [blame] | 449 | if (cb->args[1]) { |
| 450 | if (ct != last) |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 451 | continue; |
Patrick McHardy | d205dc4 | 2006-08-17 18:12:38 -0700 | [diff] [blame] | 452 | cb->args[1] = 0; |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 453 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 454 | if (ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).pid, |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 455 | cb->nlh->nlmsg_seq, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 456 | IPCTNL_MSG_CT_NEW, |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 457 | 1, ct) < 0) { |
| 458 | nf_conntrack_get(&ct->ct_general); |
| 459 | cb->args[1] = (unsigned long)ct; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 460 | goto out; |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 461 | } |
Pablo Neira Ayuso | 01f3484 | 2006-09-20 12:00:45 -0700 | [diff] [blame] | 462 | #ifdef CONFIG_NF_CT_ACCT |
| 463 | if (NFNL_MSG_TYPE(cb->nlh->nlmsg_type) == |
| 464 | IPCTNL_MSG_CT_GET_CTRZERO) |
| 465 | memset(&ct->counters, 0, sizeof(ct->counters)); |
| 466 | #endif |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 467 | } |
Patrick McHardy | d205dc4 | 2006-08-17 18:12:38 -0700 | [diff] [blame] | 468 | if (cb->args[1]) { |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 469 | cb->args[1] = 0; |
| 470 | goto restart; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 471 | } |
| 472 | } |
Patrick McHardy | 89f2e21 | 2006-05-29 18:24:58 -0700 | [diff] [blame] | 473 | out: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 474 | read_unlock_bh(&nf_conntrack_lock); |
Patrick McHardy | d205dc4 | 2006-08-17 18:12:38 -0700 | [diff] [blame] | 475 | if (last) |
| 476 | nf_ct_put(last); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 477 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 478 | return skb->len; |
| 479 | } |
| 480 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 481 | static inline int |
| 482 | ctnetlink_parse_tuple_ip(struct nfattr *attr, struct nf_conntrack_tuple *tuple) |
| 483 | { |
| 484 | struct nfattr *tb[CTA_IP_MAX]; |
| 485 | struct nf_conntrack_l3proto *l3proto; |
| 486 | int ret = 0; |
| 487 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 488 | nfattr_parse_nested(tb, CTA_IP_MAX, attr); |
| 489 | |
| 490 | l3proto = nf_ct_l3proto_find_get(tuple->src.l3num); |
| 491 | |
| 492 | if (likely(l3proto->nfattr_to_tuple)) |
| 493 | ret = l3proto->nfattr_to_tuple(tb, tuple); |
| 494 | |
| 495 | nf_ct_l3proto_put(l3proto); |
| 496 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 497 | return ret; |
| 498 | } |
| 499 | |
| 500 | static const size_t cta_min_proto[CTA_PROTO_MAX] = { |
| 501 | [CTA_PROTO_NUM-1] = sizeof(u_int8_t), |
| 502 | }; |
| 503 | |
| 504 | static inline int |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 505 | ctnetlink_parse_tuple_proto(struct nfattr *attr, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 506 | struct nf_conntrack_tuple *tuple) |
| 507 | { |
| 508 | struct nfattr *tb[CTA_PROTO_MAX]; |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 509 | struct nf_conntrack_l4proto *l4proto; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 510 | int ret = 0; |
| 511 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 512 | nfattr_parse_nested(tb, CTA_PROTO_MAX, attr); |
| 513 | |
| 514 | if (nfattr_bad_size(tb, CTA_PROTO_MAX, cta_min_proto)) |
| 515 | return -EINVAL; |
| 516 | |
| 517 | if (!tb[CTA_PROTO_NUM-1]) |
| 518 | return -EINVAL; |
| 519 | tuple->dst.protonum = *(u_int8_t *)NFA_DATA(tb[CTA_PROTO_NUM-1]); |
| 520 | |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 521 | 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] | 522 | |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 523 | if (likely(l4proto->nfattr_to_tuple)) |
| 524 | ret = l4proto->nfattr_to_tuple(tb, tuple); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 525 | |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 526 | nf_ct_l4proto_put(l4proto); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 527 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 528 | return ret; |
| 529 | } |
| 530 | |
| 531 | static inline int |
| 532 | ctnetlink_parse_tuple(struct nfattr *cda[], struct nf_conntrack_tuple *tuple, |
| 533 | enum ctattr_tuple type, u_int8_t l3num) |
| 534 | { |
| 535 | struct nfattr *tb[CTA_TUPLE_MAX]; |
| 536 | int err; |
| 537 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 538 | memset(tuple, 0, sizeof(*tuple)); |
| 539 | |
| 540 | nfattr_parse_nested(tb, CTA_TUPLE_MAX, cda[type-1]); |
| 541 | |
| 542 | if (!tb[CTA_TUPLE_IP-1]) |
| 543 | return -EINVAL; |
| 544 | |
| 545 | tuple->src.l3num = l3num; |
| 546 | |
| 547 | err = ctnetlink_parse_tuple_ip(tb[CTA_TUPLE_IP-1], tuple); |
| 548 | if (err < 0) |
| 549 | return err; |
| 550 | |
| 551 | if (!tb[CTA_TUPLE_PROTO-1]) |
| 552 | return -EINVAL; |
| 553 | |
| 554 | err = ctnetlink_parse_tuple_proto(tb[CTA_TUPLE_PROTO-1], tuple); |
| 555 | if (err < 0) |
| 556 | return err; |
| 557 | |
| 558 | /* orig and expect tuples get DIR_ORIGINAL */ |
| 559 | if (type == CTA_TUPLE_REPLY) |
| 560 | tuple->dst.dir = IP_CT_DIR_REPLY; |
| 561 | else |
| 562 | tuple->dst.dir = IP_CT_DIR_ORIGINAL; |
| 563 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 564 | return 0; |
| 565 | } |
| 566 | |
Jozsef Kadlecsik | 5b1158e | 2006-12-02 22:07:13 -0800 | [diff] [blame] | 567 | #ifdef CONFIG_NF_NAT_NEEDED |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 568 | static const size_t cta_min_protonat[CTA_PROTONAT_MAX] = { |
| 569 | [CTA_PROTONAT_PORT_MIN-1] = sizeof(u_int16_t), |
| 570 | [CTA_PROTONAT_PORT_MAX-1] = sizeof(u_int16_t), |
| 571 | }; |
| 572 | |
Jozsef Kadlecsik | 5b1158e | 2006-12-02 22:07:13 -0800 | [diff] [blame] | 573 | static int nfnetlink_parse_nat_proto(struct nfattr *attr, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 574 | const struct nf_conn *ct, |
Jozsef Kadlecsik | 5b1158e | 2006-12-02 22:07:13 -0800 | [diff] [blame] | 575 | struct nf_nat_range *range) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 576 | { |
| 577 | struct nfattr *tb[CTA_PROTONAT_MAX]; |
Jozsef Kadlecsik | 5b1158e | 2006-12-02 22:07:13 -0800 | [diff] [blame] | 578 | struct nf_nat_protocol *npt; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 579 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 580 | nfattr_parse_nested(tb, CTA_PROTONAT_MAX, attr); |
| 581 | |
| 582 | if (nfattr_bad_size(tb, CTA_PROTONAT_MAX, cta_min_protonat)) |
| 583 | return -EINVAL; |
| 584 | |
Jozsef Kadlecsik | 5b1158e | 2006-12-02 22:07:13 -0800 | [diff] [blame] | 585 | 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] | 586 | |
| 587 | if (!npt->nfattr_to_range) { |
Jozsef Kadlecsik | 5b1158e | 2006-12-02 22:07:13 -0800 | [diff] [blame] | 588 | nf_nat_proto_put(npt); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 589 | return 0; |
| 590 | } |
| 591 | |
| 592 | /* nfattr_to_range returns 1 if it parsed, 0 if not, neg. on error */ |
| 593 | if (npt->nfattr_to_range(tb, range) > 0) |
| 594 | range->flags |= IP_NAT_RANGE_PROTO_SPECIFIED; |
| 595 | |
Jozsef Kadlecsik | 5b1158e | 2006-12-02 22:07:13 -0800 | [diff] [blame] | 596 | nf_nat_proto_put(npt); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 597 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 598 | return 0; |
| 599 | } |
| 600 | |
| 601 | static const size_t cta_min_nat[CTA_NAT_MAX] = { |
| 602 | [CTA_NAT_MINIP-1] = sizeof(u_int32_t), |
| 603 | [CTA_NAT_MAXIP-1] = sizeof(u_int32_t), |
| 604 | }; |
| 605 | |
| 606 | static inline int |
Jozsef Kadlecsik | 5b1158e | 2006-12-02 22:07:13 -0800 | [diff] [blame] | 607 | nfnetlink_parse_nat(struct nfattr *nat, |
| 608 | const struct nf_conn *ct, struct nf_nat_range *range) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 609 | { |
| 610 | struct nfattr *tb[CTA_NAT_MAX]; |
| 611 | int err; |
| 612 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 613 | memset(range, 0, sizeof(*range)); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 614 | |
Patrick McHardy | 3726add | 2006-05-29 18:24:39 -0700 | [diff] [blame] | 615 | nfattr_parse_nested(tb, CTA_NAT_MAX, nat); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 616 | |
| 617 | if (nfattr_bad_size(tb, CTA_NAT_MAX, cta_min_nat)) |
| 618 | return -EINVAL; |
| 619 | |
| 620 | if (tb[CTA_NAT_MINIP-1]) |
Patrick McHardy | bff9a89 | 2006-12-02 22:05:08 -0800 | [diff] [blame] | 621 | range->min_ip = *(__be32 *)NFA_DATA(tb[CTA_NAT_MINIP-1]); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 622 | |
| 623 | if (!tb[CTA_NAT_MAXIP-1]) |
| 624 | range->max_ip = range->min_ip; |
| 625 | else |
Patrick McHardy | bff9a89 | 2006-12-02 22:05:08 -0800 | [diff] [blame] | 626 | range->max_ip = *(__be32 *)NFA_DATA(tb[CTA_NAT_MAXIP-1]); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 627 | |
| 628 | if (range->min_ip) |
| 629 | range->flags |= IP_NAT_RANGE_MAP_IPS; |
| 630 | |
| 631 | if (!tb[CTA_NAT_PROTO-1]) |
| 632 | return 0; |
| 633 | |
Jozsef Kadlecsik | 5b1158e | 2006-12-02 22:07:13 -0800 | [diff] [blame] | 634 | err = nfnetlink_parse_nat_proto(tb[CTA_NAT_PROTO-1], ct, range); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 635 | if (err < 0) |
| 636 | return err; |
| 637 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 638 | return 0; |
| 639 | } |
| 640 | #endif |
| 641 | |
| 642 | static inline int |
| 643 | ctnetlink_parse_help(struct nfattr *attr, char **helper_name) |
| 644 | { |
| 645 | struct nfattr *tb[CTA_HELP_MAX]; |
| 646 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 647 | nfattr_parse_nested(tb, CTA_HELP_MAX, attr); |
| 648 | |
| 649 | if (!tb[CTA_HELP_NAME-1]) |
| 650 | return -EINVAL; |
| 651 | |
| 652 | *helper_name = NFA_DATA(tb[CTA_HELP_NAME-1]); |
| 653 | |
| 654 | return 0; |
| 655 | } |
| 656 | |
| 657 | static const size_t cta_min[CTA_MAX] = { |
| 658 | [CTA_STATUS-1] = sizeof(u_int32_t), |
| 659 | [CTA_TIMEOUT-1] = sizeof(u_int32_t), |
| 660 | [CTA_MARK-1] = sizeof(u_int32_t), |
| 661 | [CTA_USE-1] = sizeof(u_int32_t), |
| 662 | [CTA_ID-1] = sizeof(u_int32_t) |
| 663 | }; |
| 664 | |
| 665 | static int |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 666 | ctnetlink_del_conntrack(struct sock *ctnl, struct sk_buff *skb, |
Thomas Graf | 1d00a4e | 2007-03-22 23:30:12 -0700 | [diff] [blame] | 667 | struct nlmsghdr *nlh, struct nfattr *cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 668 | { |
| 669 | struct nf_conntrack_tuple_hash *h; |
| 670 | struct nf_conntrack_tuple tuple; |
| 671 | struct nf_conn *ct; |
| 672 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); |
| 673 | u_int8_t u3 = nfmsg->nfgen_family; |
| 674 | int err = 0; |
| 675 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 676 | if (nfattr_bad_size(cda, CTA_MAX, cta_min)) |
| 677 | return -EINVAL; |
| 678 | |
| 679 | if (cda[CTA_TUPLE_ORIG-1]) |
| 680 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, u3); |
| 681 | else if (cda[CTA_TUPLE_REPLY-1]) |
| 682 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, u3); |
| 683 | else { |
| 684 | /* Flush the whole table */ |
| 685 | nf_conntrack_flush(); |
| 686 | return 0; |
| 687 | } |
| 688 | |
| 689 | if (err < 0) |
| 690 | return err; |
| 691 | |
Patrick McHardy | 330f7db | 2007-07-07 22:28:42 -0700 | [diff] [blame] | 692 | h = nf_conntrack_find_get(&tuple); |
Pablo Neira Ayuso | 9ea8cfd | 2006-10-12 14:09:16 -0700 | [diff] [blame] | 693 | if (!h) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 694 | return -ENOENT; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 695 | |
| 696 | ct = nf_ct_tuplehash_to_ctrack(h); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 697 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 698 | if (cda[CTA_ID-1]) { |
Patrick McHardy | bff9a89 | 2006-12-02 22:05:08 -0800 | [diff] [blame] | 699 | u_int32_t id = ntohl(*(__be32 *)NFA_DATA(cda[CTA_ID-1])); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 700 | if (ct->id != id) { |
| 701 | nf_ct_put(ct); |
| 702 | return -ENOENT; |
| 703 | } |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 704 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 705 | if (del_timer(&ct->timeout)) |
| 706 | ct->timeout.function((unsigned long)ct); |
| 707 | |
| 708 | nf_ct_put(ct); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 709 | |
| 710 | return 0; |
| 711 | } |
| 712 | |
| 713 | static int |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 714 | ctnetlink_get_conntrack(struct sock *ctnl, struct sk_buff *skb, |
Thomas Graf | 1d00a4e | 2007-03-22 23:30:12 -0700 | [diff] [blame] | 715 | struct nlmsghdr *nlh, struct nfattr *cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 716 | { |
| 717 | struct nf_conntrack_tuple_hash *h; |
| 718 | struct nf_conntrack_tuple tuple; |
| 719 | struct nf_conn *ct; |
| 720 | struct sk_buff *skb2 = NULL; |
| 721 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); |
| 722 | u_int8_t u3 = nfmsg->nfgen_family; |
| 723 | int err = 0; |
| 724 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 725 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
Pablo Neira Ayuso | 01f3484 | 2006-09-20 12:00:45 -0700 | [diff] [blame] | 726 | #ifndef CONFIG_NF_CT_ACCT |
| 727 | 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] | 728 | return -ENOTSUPP; |
| 729 | #endif |
Thomas Graf | c702e80 | 2007-03-22 23:30:55 -0700 | [diff] [blame] | 730 | return netlink_dump_start(ctnl, skb, nlh, ctnetlink_dump_table, |
| 731 | ctnetlink_done); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 732 | } |
| 733 | |
| 734 | if (nfattr_bad_size(cda, CTA_MAX, cta_min)) |
| 735 | return -EINVAL; |
| 736 | |
| 737 | if (cda[CTA_TUPLE_ORIG-1]) |
| 738 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG, u3); |
| 739 | else if (cda[CTA_TUPLE_REPLY-1]) |
| 740 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, u3); |
| 741 | else |
| 742 | return -EINVAL; |
| 743 | |
| 744 | if (err < 0) |
| 745 | return err; |
| 746 | |
Patrick McHardy | 330f7db | 2007-07-07 22:28:42 -0700 | [diff] [blame] | 747 | h = nf_conntrack_find_get(&tuple); |
Pablo Neira Ayuso | 9ea8cfd | 2006-10-12 14:09:16 -0700 | [diff] [blame] | 748 | if (!h) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 749 | return -ENOENT; |
Pablo Neira Ayuso | 9ea8cfd | 2006-10-12 14:09:16 -0700 | [diff] [blame] | 750 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 751 | ct = nf_ct_tuplehash_to_ctrack(h); |
| 752 | |
| 753 | err = -ENOMEM; |
| 754 | skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); |
| 755 | if (!skb2) { |
| 756 | nf_ct_put(ct); |
| 757 | return -ENOMEM; |
| 758 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 759 | |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 760 | 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] | 761 | IPCTNL_MSG_CT_NEW, 1, ct); |
| 762 | nf_ct_put(ct); |
| 763 | if (err <= 0) |
| 764 | goto free; |
| 765 | |
| 766 | err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).pid, MSG_DONTWAIT); |
| 767 | if (err < 0) |
| 768 | goto out; |
| 769 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 770 | return 0; |
| 771 | |
| 772 | free: |
| 773 | kfree_skb(skb2); |
| 774 | out: |
| 775 | return err; |
| 776 | } |
| 777 | |
| 778 | static inline int |
| 779 | ctnetlink_change_status(struct nf_conn *ct, struct nfattr *cda[]) |
| 780 | { |
| 781 | unsigned long d; |
Patrick McHardy | bff9a89 | 2006-12-02 22:05:08 -0800 | [diff] [blame] | 782 | unsigned int status = ntohl(*(__be32 *)NFA_DATA(cda[CTA_STATUS-1])); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 783 | d = ct->status ^ status; |
| 784 | |
| 785 | if (d & (IPS_EXPECTED|IPS_CONFIRMED|IPS_DYING)) |
| 786 | /* unchangeable */ |
| 787 | return -EINVAL; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 788 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 789 | if (d & IPS_SEEN_REPLY && !(status & IPS_SEEN_REPLY)) |
| 790 | /* SEEN_REPLY bit can only be set */ |
| 791 | return -EINVAL; |
| 792 | |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 793 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 794 | if (d & IPS_ASSURED && !(status & IPS_ASSURED)) |
| 795 | /* ASSURED bit can only be set */ |
| 796 | return -EINVAL; |
| 797 | |
Patrick McHardy | 3726add | 2006-05-29 18:24:39 -0700 | [diff] [blame] | 798 | if (cda[CTA_NAT_SRC-1] || cda[CTA_NAT_DST-1]) { |
Jozsef Kadlecsik | 5b1158e | 2006-12-02 22:07:13 -0800 | [diff] [blame] | 799 | #ifndef CONFIG_NF_NAT_NEEDED |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 800 | return -EINVAL; |
| 801 | #else |
Jozsef Kadlecsik | 5b1158e | 2006-12-02 22:07:13 -0800 | [diff] [blame] | 802 | struct nf_nat_range range; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 803 | |
Patrick McHardy | 3726add | 2006-05-29 18:24:39 -0700 | [diff] [blame] | 804 | if (cda[CTA_NAT_DST-1]) { |
Jozsef Kadlecsik | 5b1158e | 2006-12-02 22:07:13 -0800 | [diff] [blame] | 805 | if (nfnetlink_parse_nat(cda[CTA_NAT_DST-1], ct, |
Patrick McHardy | 3726add | 2006-05-29 18:24:39 -0700 | [diff] [blame] | 806 | &range) < 0) |
| 807 | return -EINVAL; |
Jozsef Kadlecsik | 5b1158e | 2006-12-02 22:07:13 -0800 | [diff] [blame] | 808 | if (nf_nat_initialized(ct, |
Patrick McHardy | 3726add | 2006-05-29 18:24:39 -0700 | [diff] [blame] | 809 | HOOK2MANIP(NF_IP_PRE_ROUTING))) |
| 810 | return -EEXIST; |
Jozsef Kadlecsik | 5b1158e | 2006-12-02 22:07:13 -0800 | [diff] [blame] | 811 | nf_nat_setup_info(ct, &range, NF_IP_PRE_ROUTING); |
Patrick McHardy | 3726add | 2006-05-29 18:24:39 -0700 | [diff] [blame] | 812 | } |
| 813 | if (cda[CTA_NAT_SRC-1]) { |
Jozsef Kadlecsik | 5b1158e | 2006-12-02 22:07:13 -0800 | [diff] [blame] | 814 | if (nfnetlink_parse_nat(cda[CTA_NAT_SRC-1], ct, |
Patrick McHardy | 3726add | 2006-05-29 18:24:39 -0700 | [diff] [blame] | 815 | &range) < 0) |
| 816 | return -EINVAL; |
Jozsef Kadlecsik | 5b1158e | 2006-12-02 22:07:13 -0800 | [diff] [blame] | 817 | if (nf_nat_initialized(ct, |
Patrick McHardy | 3726add | 2006-05-29 18:24:39 -0700 | [diff] [blame] | 818 | HOOK2MANIP(NF_IP_POST_ROUTING))) |
| 819 | return -EEXIST; |
Jozsef Kadlecsik | 5b1158e | 2006-12-02 22:07:13 -0800 | [diff] [blame] | 820 | nf_nat_setup_info(ct, &range, NF_IP_POST_ROUTING); |
Patrick McHardy | 3726add | 2006-05-29 18:24:39 -0700 | [diff] [blame] | 821 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 822 | #endif |
| 823 | } |
| 824 | |
| 825 | /* Be careful here, modifying NAT bits can screw up things, |
| 826 | * 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] | 827 | * nf_nat_range. */ |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 828 | ct->status |= status & ~(IPS_NAT_DONE_MASK | IPS_NAT_MASK); |
| 829 | return 0; |
| 830 | } |
| 831 | |
| 832 | |
| 833 | static inline int |
| 834 | ctnetlink_change_helper(struct nf_conn *ct, struct nfattr *cda[]) |
| 835 | { |
| 836 | struct nf_conntrack_helper *helper; |
Harald Welte | dc808fe | 2006-03-20 17:56:32 -0800 | [diff] [blame] | 837 | struct nf_conn_help *help = nfct_help(ct); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 838 | char *helpname; |
| 839 | int err; |
| 840 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 841 | /* don't change helper of sibling connections */ |
| 842 | if (ct->master) |
| 843 | return -EINVAL; |
| 844 | |
| 845 | err = ctnetlink_parse_help(cda[CTA_HELP-1], &helpname); |
| 846 | if (err < 0) |
| 847 | return err; |
| 848 | |
Yasuyuki Kozakai | df293bb | 2007-05-10 14:15:58 -0700 | [diff] [blame] | 849 | if (!strcmp(helpname, "")) { |
| 850 | if (help && help->helper) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 851 | /* we had a helper before ... */ |
| 852 | nf_ct_remove_expectations(ct); |
Patrick McHarrdy | 3c158f7 | 2007-06-05 12:55:27 -0700 | [diff] [blame] | 853 | rcu_assign_pointer(help->helper, NULL); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 854 | } |
Yasuyuki Kozakai | df293bb | 2007-05-10 14:15:58 -0700 | [diff] [blame] | 855 | |
| 856 | return 0; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 857 | } |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 858 | |
Yasuyuki Kozakai | df293bb | 2007-05-10 14:15:58 -0700 | [diff] [blame] | 859 | helper = __nf_conntrack_helper_find_byname(helpname); |
| 860 | if (helper == NULL) |
| 861 | return -EINVAL; |
| 862 | |
Yasuyuki Kozakai | ceceae1 | 2007-07-07 22:23:42 -0700 | [diff] [blame] | 863 | if (help) { |
| 864 | if (help->helper == helper) |
| 865 | return 0; |
| 866 | if (help->helper) |
| 867 | return -EBUSY; |
| 868 | /* need to zero data of old helper */ |
| 869 | memset(&help->help, 0, sizeof(help->help)); |
| 870 | } else { |
| 871 | help = nf_ct_ext_add(ct, NF_CT_EXT_HELPER, GFP_KERNEL); |
| 872 | if (help == NULL) |
| 873 | return -ENOMEM; |
| 874 | } |
Yasuyuki Kozakai | df293bb | 2007-05-10 14:15:58 -0700 | [diff] [blame] | 875 | |
Patrick McHarrdy | 3c158f7 | 2007-06-05 12:55:27 -0700 | [diff] [blame] | 876 | rcu_assign_pointer(help->helper, helper); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 877 | |
| 878 | return 0; |
| 879 | } |
| 880 | |
| 881 | static inline int |
| 882 | ctnetlink_change_timeout(struct nf_conn *ct, struct nfattr *cda[]) |
| 883 | { |
Patrick McHardy | bff9a89 | 2006-12-02 22:05:08 -0800 | [diff] [blame] | 884 | u_int32_t timeout = ntohl(*(__be32 *)NFA_DATA(cda[CTA_TIMEOUT-1])); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 885 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 886 | if (!del_timer(&ct->timeout)) |
| 887 | return -ETIME; |
| 888 | |
| 889 | ct->timeout.expires = jiffies + timeout * HZ; |
| 890 | add_timer(&ct->timeout); |
| 891 | |
| 892 | return 0; |
| 893 | } |
| 894 | |
| 895 | static inline int |
| 896 | ctnetlink_change_protoinfo(struct nf_conn *ct, struct nfattr *cda[]) |
| 897 | { |
| 898 | struct nfattr *tb[CTA_PROTOINFO_MAX], *attr = cda[CTA_PROTOINFO-1]; |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 899 | struct nf_conntrack_l4proto *l4proto; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 900 | u_int16_t npt = ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.protonum; |
| 901 | u_int16_t l3num = ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.l3num; |
| 902 | int err = 0; |
| 903 | |
| 904 | nfattr_parse_nested(tb, CTA_PROTOINFO_MAX, attr); |
| 905 | |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 906 | l4proto = nf_ct_l4proto_find_get(l3num, npt); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 907 | |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 908 | if (l4proto->from_nfattr) |
| 909 | err = l4proto->from_nfattr(tb, ct); |
| 910 | nf_ct_l4proto_put(l4proto); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 911 | |
| 912 | return err; |
| 913 | } |
| 914 | |
| 915 | static int |
| 916 | ctnetlink_change_conntrack(struct nf_conn *ct, struct nfattr *cda[]) |
| 917 | { |
| 918 | int err; |
| 919 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 920 | if (cda[CTA_HELP-1]) { |
| 921 | err = ctnetlink_change_helper(ct, cda); |
| 922 | if (err < 0) |
| 923 | return err; |
| 924 | } |
| 925 | |
| 926 | if (cda[CTA_TIMEOUT-1]) { |
| 927 | err = ctnetlink_change_timeout(ct, cda); |
| 928 | if (err < 0) |
| 929 | return err; |
| 930 | } |
| 931 | |
| 932 | if (cda[CTA_STATUS-1]) { |
| 933 | err = ctnetlink_change_status(ct, cda); |
| 934 | if (err < 0) |
| 935 | return err; |
| 936 | } |
| 937 | |
| 938 | if (cda[CTA_PROTOINFO-1]) { |
| 939 | err = ctnetlink_change_protoinfo(ct, cda); |
| 940 | if (err < 0) |
| 941 | return err; |
| 942 | } |
| 943 | |
Martin Josefsson | bcd1e83 | 2006-04-01 02:23:21 -0800 | [diff] [blame] | 944 | #if defined(CONFIG_NF_CONNTRACK_MARK) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 945 | if (cda[CTA_MARK-1]) |
Patrick McHardy | bff9a89 | 2006-12-02 22:05:08 -0800 | [diff] [blame] | 946 | ct->mark = ntohl(*(__be32 *)NFA_DATA(cda[CTA_MARK-1])); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 947 | #endif |
| 948 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 949 | return 0; |
| 950 | } |
| 951 | |
| 952 | static int |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 953 | ctnetlink_create_conntrack(struct nfattr *cda[], |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 954 | struct nf_conntrack_tuple *otuple, |
| 955 | struct nf_conntrack_tuple *rtuple) |
| 956 | { |
| 957 | struct nf_conn *ct; |
| 958 | int err = -EINVAL; |
Yasuyuki Kozakai | dafc741 | 2006-11-27 10:25:32 -0800 | [diff] [blame] | 959 | struct nf_conn_help *help; |
Yasuyuki Kozakai | ceceae1 | 2007-07-07 22:23:42 -0700 | [diff] [blame] | 960 | struct nf_conntrack_helper *helper; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 961 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 962 | ct = nf_conntrack_alloc(otuple, rtuple); |
| 963 | if (ct == NULL || IS_ERR(ct)) |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 964 | return -ENOMEM; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 965 | |
| 966 | if (!cda[CTA_TIMEOUT-1]) |
| 967 | goto err; |
Patrick McHardy | bff9a89 | 2006-12-02 22:05:08 -0800 | [diff] [blame] | 968 | ct->timeout.expires = ntohl(*(__be32 *)NFA_DATA(cda[CTA_TIMEOUT-1])); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 969 | |
| 970 | ct->timeout.expires = jiffies + ct->timeout.expires * HZ; |
| 971 | ct->status |= IPS_CONFIRMED; |
| 972 | |
Pablo Neira Ayuso | bbb3357 | 2006-11-29 02:35:31 +0100 | [diff] [blame] | 973 | if (cda[CTA_STATUS-1]) { |
| 974 | err = ctnetlink_change_status(ct, cda); |
| 975 | if (err < 0) |
| 976 | goto err; |
| 977 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 978 | |
| 979 | if (cda[CTA_PROTOINFO-1]) { |
| 980 | err = ctnetlink_change_protoinfo(ct, cda); |
| 981 | if (err < 0) |
Patrick McHardy | c54ea3b | 2007-01-15 17:16:03 -0800 | [diff] [blame] | 982 | goto err; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 983 | } |
| 984 | |
Martin Josefsson | bcd1e83 | 2006-04-01 02:23:21 -0800 | [diff] [blame] | 985 | #if defined(CONFIG_NF_CONNTRACK_MARK) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 986 | if (cda[CTA_MARK-1]) |
Patrick McHardy | bff9a89 | 2006-12-02 22:05:08 -0800 | [diff] [blame] | 987 | ct->mark = ntohl(*(__be32 *)NFA_DATA(cda[CTA_MARK-1])); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 988 | #endif |
| 989 | |
Yasuyuki Kozakai | ceceae1 | 2007-07-07 22:23:42 -0700 | [diff] [blame] | 990 | helper = nf_ct_helper_find_get(rtuple); |
| 991 | if (helper) { |
| 992 | help = nf_ct_ext_add(ct, NF_CT_EXT_HELPER, GFP_KERNEL); |
| 993 | if (help == NULL) { |
| 994 | nf_ct_helper_put(helper); |
| 995 | err = -ENOMEM; |
| 996 | goto err; |
| 997 | } |
Patrick McHarrdy | 3c158f7 | 2007-06-05 12:55:27 -0700 | [diff] [blame] | 998 | /* not in hash table yet so not strictly necessary */ |
| 999 | rcu_assign_pointer(help->helper, helper); |
| 1000 | } |
Yasuyuki Kozakai | dafc741 | 2006-11-27 10:25:32 -0800 | [diff] [blame] | 1001 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1002 | add_timer(&ct->timeout); |
| 1003 | nf_conntrack_hash_insert(ct); |
| 1004 | |
Patrick McHarrdy | 3c158f7 | 2007-06-05 12:55:27 -0700 | [diff] [blame] | 1005 | if (helper) |
| 1006 | nf_ct_helper_put(helper); |
Yasuyuki Kozakai | dafc741 | 2006-11-27 10:25:32 -0800 | [diff] [blame] | 1007 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1008 | return 0; |
| 1009 | |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1010 | err: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1011 | nf_conntrack_free(ct); |
| 1012 | return err; |
| 1013 | } |
| 1014 | |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1015 | static int |
| 1016 | ctnetlink_new_conntrack(struct sock *ctnl, struct sk_buff *skb, |
Thomas Graf | 1d00a4e | 2007-03-22 23:30:12 -0700 | [diff] [blame] | 1017 | struct nlmsghdr *nlh, struct nfattr *cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1018 | { |
| 1019 | struct nf_conntrack_tuple otuple, rtuple; |
| 1020 | struct nf_conntrack_tuple_hash *h = NULL; |
| 1021 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); |
| 1022 | u_int8_t u3 = nfmsg->nfgen_family; |
| 1023 | int err = 0; |
| 1024 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1025 | if (nfattr_bad_size(cda, CTA_MAX, cta_min)) |
| 1026 | return -EINVAL; |
| 1027 | |
| 1028 | if (cda[CTA_TUPLE_ORIG-1]) { |
| 1029 | err = ctnetlink_parse_tuple(cda, &otuple, CTA_TUPLE_ORIG, u3); |
| 1030 | if (err < 0) |
| 1031 | return err; |
| 1032 | } |
| 1033 | |
| 1034 | if (cda[CTA_TUPLE_REPLY-1]) { |
| 1035 | err = ctnetlink_parse_tuple(cda, &rtuple, CTA_TUPLE_REPLY, u3); |
| 1036 | if (err < 0) |
| 1037 | return err; |
| 1038 | } |
| 1039 | |
| 1040 | write_lock_bh(&nf_conntrack_lock); |
| 1041 | if (cda[CTA_TUPLE_ORIG-1]) |
| 1042 | h = __nf_conntrack_find(&otuple, NULL); |
| 1043 | else if (cda[CTA_TUPLE_REPLY-1]) |
| 1044 | h = __nf_conntrack_find(&rtuple, NULL); |
| 1045 | |
| 1046 | if (h == NULL) { |
| 1047 | write_unlock_bh(&nf_conntrack_lock); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1048 | err = -ENOENT; |
| 1049 | if (nlh->nlmsg_flags & NLM_F_CREATE) |
| 1050 | err = ctnetlink_create_conntrack(cda, &otuple, &rtuple); |
| 1051 | return err; |
| 1052 | } |
| 1053 | /* implicit 'else' */ |
| 1054 | |
| 1055 | /* we only allow nat config for new conntracks */ |
Patrick McHardy | 3726add | 2006-05-29 18:24:39 -0700 | [diff] [blame] | 1056 | if (cda[CTA_NAT_SRC-1] || cda[CTA_NAT_DST-1]) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1057 | err = -EINVAL; |
| 1058 | goto out_unlock; |
| 1059 | } |
| 1060 | |
| 1061 | /* We manipulate the conntrack inside the global conntrack table lock, |
| 1062 | * so there's no need to increase the refcount */ |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1063 | err = -EEXIST; |
| 1064 | if (!(nlh->nlmsg_flags & NLM_F_EXCL)) |
| 1065 | err = ctnetlink_change_conntrack(nf_ct_tuplehash_to_ctrack(h), cda); |
| 1066 | |
| 1067 | out_unlock: |
| 1068 | write_unlock_bh(&nf_conntrack_lock); |
| 1069 | return err; |
| 1070 | } |
| 1071 | |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1072 | /*********************************************************************** |
| 1073 | * EXPECT |
| 1074 | ***********************************************************************/ |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1075 | |
| 1076 | static inline int |
| 1077 | ctnetlink_exp_dump_tuple(struct sk_buff *skb, |
| 1078 | const struct nf_conntrack_tuple *tuple, |
| 1079 | enum ctattr_expect type) |
| 1080 | { |
| 1081 | struct nfattr *nest_parms = NFA_NEST(skb, type); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1082 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1083 | if (ctnetlink_dump_tuples(skb, tuple) < 0) |
| 1084 | goto nfattr_failure; |
| 1085 | |
| 1086 | NFA_NEST_END(skb, nest_parms); |
| 1087 | |
| 1088 | return 0; |
| 1089 | |
| 1090 | nfattr_failure: |
| 1091 | return -1; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1092 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1093 | |
| 1094 | static inline int |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 1095 | ctnetlink_exp_dump_mask(struct sk_buff *skb, |
| 1096 | const struct nf_conntrack_tuple *tuple, |
| 1097 | const struct nf_conntrack_tuple *mask) |
| 1098 | { |
| 1099 | int ret; |
| 1100 | struct nf_conntrack_l3proto *l3proto; |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 1101 | struct nf_conntrack_l4proto *l4proto; |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 1102 | struct nfattr *nest_parms = NFA_NEST(skb, CTA_EXPECT_MASK); |
| 1103 | |
| 1104 | l3proto = nf_ct_l3proto_find_get(tuple->src.l3num); |
| 1105 | ret = ctnetlink_dump_tuples_ip(skb, mask, l3proto); |
| 1106 | nf_ct_l3proto_put(l3proto); |
| 1107 | |
| 1108 | if (unlikely(ret < 0)) |
| 1109 | goto nfattr_failure; |
| 1110 | |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 1111 | l4proto = nf_ct_l4proto_find_get(tuple->src.l3num, tuple->dst.protonum); |
| 1112 | ret = ctnetlink_dump_tuples_proto(skb, mask, l4proto); |
| 1113 | nf_ct_l4proto_put(l4proto); |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 1114 | if (unlikely(ret < 0)) |
| 1115 | goto nfattr_failure; |
| 1116 | |
| 1117 | NFA_NEST_END(skb, nest_parms); |
| 1118 | |
| 1119 | return 0; |
| 1120 | |
| 1121 | nfattr_failure: |
| 1122 | return -1; |
| 1123 | } |
| 1124 | |
| 1125 | static inline int |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1126 | ctnetlink_exp_dump_expect(struct sk_buff *skb, |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1127 | const struct nf_conntrack_expect *exp) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1128 | { |
| 1129 | struct nf_conn *master = exp->master; |
Patrick McHardy | bff9a89 | 2006-12-02 22:05:08 -0800 | [diff] [blame] | 1130 | __be32 timeout = htonl((exp->timeout.expires - jiffies) / HZ); |
| 1131 | __be32 id = htonl(exp->id); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1132 | |
| 1133 | if (ctnetlink_exp_dump_tuple(skb, &exp->tuple, CTA_EXPECT_TUPLE) < 0) |
| 1134 | goto nfattr_failure; |
Pablo Neira Ayuso | 1cde643 | 2006-03-22 13:54:15 -0800 | [diff] [blame] | 1135 | if (ctnetlink_exp_dump_mask(skb, &exp->tuple, &exp->mask) < 0) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1136 | goto nfattr_failure; |
| 1137 | if (ctnetlink_exp_dump_tuple(skb, |
| 1138 | &master->tuplehash[IP_CT_DIR_ORIGINAL].tuple, |
| 1139 | CTA_EXPECT_MASTER) < 0) |
| 1140 | goto nfattr_failure; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1141 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1142 | NFA_PUT(skb, CTA_EXPECT_TIMEOUT, sizeof(timeout), &timeout); |
| 1143 | NFA_PUT(skb, CTA_EXPECT_ID, sizeof(u_int32_t), &id); |
| 1144 | |
| 1145 | return 0; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1146 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1147 | nfattr_failure: |
| 1148 | return -1; |
| 1149 | } |
| 1150 | |
| 1151 | static int |
| 1152 | ctnetlink_exp_fill_info(struct sk_buff *skb, u32 pid, u32 seq, |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1153 | int event, |
| 1154 | int nowait, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1155 | const struct nf_conntrack_expect *exp) |
| 1156 | { |
| 1157 | struct nlmsghdr *nlh; |
| 1158 | struct nfgenmsg *nfmsg; |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 1159 | unsigned char *b = skb_tail_pointer(skb); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1160 | |
| 1161 | event |= NFNL_SUBSYS_CTNETLINK_EXP << 8; |
| 1162 | nlh = NLMSG_PUT(skb, pid, seq, event, sizeof(struct nfgenmsg)); |
| 1163 | nfmsg = NLMSG_DATA(nlh); |
| 1164 | |
| 1165 | nlh->nlmsg_flags = (nowait && pid) ? NLM_F_MULTI : 0; |
| 1166 | nfmsg->nfgen_family = exp->tuple.src.l3num; |
| 1167 | nfmsg->version = NFNETLINK_V0; |
| 1168 | nfmsg->res_id = 0; |
| 1169 | |
| 1170 | if (ctnetlink_exp_dump_expect(skb, exp) < 0) |
| 1171 | goto nfattr_failure; |
| 1172 | |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 1173 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1174 | return skb->len; |
| 1175 | |
| 1176 | nlmsg_failure: |
| 1177 | nfattr_failure: |
Arnaldo Carvalho de Melo | dc5fc57 | 2007-03-25 23:06:12 -0700 | [diff] [blame] | 1178 | nlmsg_trim(skb, b); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1179 | return -1; |
| 1180 | } |
| 1181 | |
| 1182 | #ifdef CONFIG_NF_CONNTRACK_EVENTS |
| 1183 | static int ctnetlink_expect_event(struct notifier_block *this, |
| 1184 | unsigned long events, void *ptr) |
| 1185 | { |
| 1186 | struct nlmsghdr *nlh; |
| 1187 | struct nfgenmsg *nfmsg; |
| 1188 | struct nf_conntrack_expect *exp = (struct nf_conntrack_expect *)ptr; |
| 1189 | struct sk_buff *skb; |
| 1190 | unsigned int type; |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 1191 | sk_buff_data_t b; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1192 | int flags = 0; |
| 1193 | |
| 1194 | if (events & IPEXP_NEW) { |
| 1195 | type = IPCTNL_MSG_EXP_NEW; |
| 1196 | flags = NLM_F_CREATE|NLM_F_EXCL; |
| 1197 | } else |
| 1198 | return NOTIFY_DONE; |
| 1199 | |
Pablo Neira Ayuso | b3a27bf | 2006-08-22 00:32:05 -0700 | [diff] [blame] | 1200 | if (!nfnetlink_has_listeners(NFNLGRP_CONNTRACK_EXP_NEW)) |
| 1201 | return NOTIFY_DONE; |
| 1202 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1203 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC); |
| 1204 | if (!skb) |
| 1205 | return NOTIFY_DONE; |
| 1206 | |
| 1207 | b = skb->tail; |
| 1208 | |
Marcus Sundberg | b633ad5 | 2006-02-04 02:11:09 -0800 | [diff] [blame] | 1209 | type |= NFNL_SUBSYS_CTNETLINK_EXP << 8; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1210 | nlh = NLMSG_PUT(skb, 0, 0, type, sizeof(struct nfgenmsg)); |
| 1211 | nfmsg = NLMSG_DATA(nlh); |
| 1212 | |
| 1213 | nlh->nlmsg_flags = flags; |
| 1214 | nfmsg->nfgen_family = exp->tuple.src.l3num; |
| 1215 | nfmsg->version = NFNETLINK_V0; |
| 1216 | nfmsg->res_id = 0; |
| 1217 | |
| 1218 | if (ctnetlink_exp_dump_expect(skb, exp) < 0) |
| 1219 | goto nfattr_failure; |
| 1220 | |
| 1221 | nlh->nlmsg_len = skb->tail - b; |
| 1222 | nfnetlink_send(skb, 0, NFNLGRP_CONNTRACK_EXP_NEW, 0); |
| 1223 | return NOTIFY_DONE; |
| 1224 | |
| 1225 | nlmsg_failure: |
| 1226 | nfattr_failure: |
| 1227 | kfree_skb(skb); |
| 1228 | return NOTIFY_DONE; |
| 1229 | } |
| 1230 | #endif |
| 1231 | |
| 1232 | static int |
| 1233 | ctnetlink_exp_dump_table(struct sk_buff *skb, struct netlink_callback *cb) |
| 1234 | { |
| 1235 | struct nf_conntrack_expect *exp = NULL; |
| 1236 | struct list_head *i; |
| 1237 | u_int32_t *id = (u_int32_t *) &cb->args[0]; |
Pablo Neira Ayuso | 87711cb | 2006-01-05 12:19:23 -0800 | [diff] [blame] | 1238 | struct nfgenmsg *nfmsg = NLMSG_DATA(cb->nlh); |
| 1239 | u_int8_t l3proto = nfmsg->nfgen_family; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1240 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1241 | read_lock_bh(&nf_conntrack_lock); |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 1242 | list_for_each_prev(i, &nf_ct_expect_list) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1243 | exp = (struct nf_conntrack_expect *) i; |
Pablo Neira Ayuso | 87711cb | 2006-01-05 12:19:23 -0800 | [diff] [blame] | 1244 | if (l3proto && exp->tuple.src.l3num != l3proto) |
| 1245 | continue; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1246 | if (exp->id <= *id) |
| 1247 | continue; |
| 1248 | if (ctnetlink_exp_fill_info(skb, NETLINK_CB(cb->skb).pid, |
| 1249 | cb->nlh->nlmsg_seq, |
| 1250 | IPCTNL_MSG_EXP_NEW, |
| 1251 | 1, exp) < 0) |
| 1252 | goto out; |
| 1253 | *id = exp->id; |
| 1254 | } |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1255 | out: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1256 | read_unlock_bh(&nf_conntrack_lock); |
| 1257 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1258 | return skb->len; |
| 1259 | } |
| 1260 | |
| 1261 | static const size_t cta_min_exp[CTA_EXPECT_MAX] = { |
| 1262 | [CTA_EXPECT_TIMEOUT-1] = sizeof(u_int32_t), |
| 1263 | [CTA_EXPECT_ID-1] = sizeof(u_int32_t) |
| 1264 | }; |
| 1265 | |
| 1266 | static int |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1267 | ctnetlink_get_expect(struct sock *ctnl, struct sk_buff *skb, |
Thomas Graf | 1d00a4e | 2007-03-22 23:30:12 -0700 | [diff] [blame] | 1268 | struct nlmsghdr *nlh, struct nfattr *cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1269 | { |
| 1270 | struct nf_conntrack_tuple tuple; |
| 1271 | struct nf_conntrack_expect *exp; |
| 1272 | struct sk_buff *skb2; |
| 1273 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); |
| 1274 | u_int8_t u3 = nfmsg->nfgen_family; |
| 1275 | int err = 0; |
| 1276 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1277 | if (nfattr_bad_size(cda, CTA_EXPECT_MAX, cta_min_exp)) |
| 1278 | return -EINVAL; |
| 1279 | |
| 1280 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
Thomas Graf | c702e80 | 2007-03-22 23:30:55 -0700 | [diff] [blame] | 1281 | return netlink_dump_start(ctnl, skb, nlh, |
| 1282 | ctnetlink_exp_dump_table, |
| 1283 | ctnetlink_done); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1284 | } |
| 1285 | |
| 1286 | if (cda[CTA_EXPECT_MASTER-1]) |
| 1287 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_MASTER, u3); |
| 1288 | else |
| 1289 | return -EINVAL; |
| 1290 | |
| 1291 | if (err < 0) |
| 1292 | return err; |
| 1293 | |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 1294 | exp = nf_ct_expect_find_get(&tuple); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1295 | if (!exp) |
| 1296 | return -ENOENT; |
| 1297 | |
| 1298 | if (cda[CTA_EXPECT_ID-1]) { |
Patrick McHardy | bff9a89 | 2006-12-02 22:05:08 -0800 | [diff] [blame] | 1299 | __be32 id = *(__be32 *)NFA_DATA(cda[CTA_EXPECT_ID-1]); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1300 | if (exp->id != ntohl(id)) { |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 1301 | nf_ct_expect_put(exp); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1302 | return -ENOENT; |
| 1303 | } |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1304 | } |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1305 | |
| 1306 | err = -ENOMEM; |
| 1307 | skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); |
| 1308 | if (!skb2) |
| 1309 | goto out; |
Thomas Graf | 4e9b826 | 2006-11-27 09:25:58 -0800 | [diff] [blame] | 1310 | |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1311 | err = ctnetlink_exp_fill_info(skb2, NETLINK_CB(skb).pid, |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1312 | nlh->nlmsg_seq, IPCTNL_MSG_EXP_NEW, |
| 1313 | 1, exp); |
| 1314 | if (err <= 0) |
| 1315 | goto free; |
| 1316 | |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 1317 | nf_ct_expect_put(exp); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1318 | |
| 1319 | return netlink_unicast(ctnl, skb2, NETLINK_CB(skb).pid, MSG_DONTWAIT); |
| 1320 | |
| 1321 | free: |
| 1322 | kfree_skb(skb2); |
| 1323 | out: |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 1324 | nf_ct_expect_put(exp); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1325 | return err; |
| 1326 | } |
| 1327 | |
| 1328 | static int |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1329 | ctnetlink_del_expect(struct sock *ctnl, struct sk_buff *skb, |
Thomas Graf | 1d00a4e | 2007-03-22 23:30:12 -0700 | [diff] [blame] | 1330 | struct nlmsghdr *nlh, struct nfattr *cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1331 | { |
| 1332 | struct nf_conntrack_expect *exp, *tmp; |
| 1333 | struct nf_conntrack_tuple tuple; |
| 1334 | struct nf_conntrack_helper *h; |
| 1335 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); |
| 1336 | u_int8_t u3 = nfmsg->nfgen_family; |
| 1337 | int err; |
| 1338 | |
| 1339 | if (nfattr_bad_size(cda, CTA_EXPECT_MAX, cta_min_exp)) |
| 1340 | return -EINVAL; |
| 1341 | |
| 1342 | if (cda[CTA_EXPECT_TUPLE-1]) { |
| 1343 | /* delete a single expect by tuple */ |
| 1344 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); |
| 1345 | if (err < 0) |
| 1346 | return err; |
| 1347 | |
| 1348 | /* bump usage count to 2 */ |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 1349 | exp = nf_ct_expect_find_get(&tuple); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1350 | if (!exp) |
| 1351 | return -ENOENT; |
| 1352 | |
| 1353 | if (cda[CTA_EXPECT_ID-1]) { |
Patrick McHardy | bff9a89 | 2006-12-02 22:05:08 -0800 | [diff] [blame] | 1354 | __be32 id = *(__be32 *)NFA_DATA(cda[CTA_EXPECT_ID-1]); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1355 | if (exp->id != ntohl(id)) { |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 1356 | nf_ct_expect_put(exp); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1357 | return -ENOENT; |
| 1358 | } |
| 1359 | } |
| 1360 | |
| 1361 | /* after list removal, usage count == 1 */ |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 1362 | nf_ct_unexpect_related(exp); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1363 | /* have to put what we 'get' above. |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1364 | * after this line usage count == 0 */ |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 1365 | nf_ct_expect_put(exp); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1366 | } else if (cda[CTA_EXPECT_HELP_NAME-1]) { |
| 1367 | char *name = NFA_DATA(cda[CTA_EXPECT_HELP_NAME-1]); |
| 1368 | |
| 1369 | /* delete all expectations for this helper */ |
| 1370 | write_lock_bh(&nf_conntrack_lock); |
| 1371 | h = __nf_conntrack_helper_find_byname(name); |
| 1372 | if (!h) { |
| 1373 | write_unlock_bh(&nf_conntrack_lock); |
| 1374 | return -EINVAL; |
| 1375 | } |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 1376 | list_for_each_entry_safe(exp, tmp, &nf_ct_expect_list, list) { |
Harald Welte | dc808fe | 2006-03-20 17:56:32 -0800 | [diff] [blame] | 1377 | struct nf_conn_help *m_help = nfct_help(exp->master); |
| 1378 | if (m_help->helper == h |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1379 | && del_timer(&exp->timeout)) { |
| 1380 | nf_ct_unlink_expect(exp); |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 1381 | nf_ct_expect_put(exp); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1382 | } |
| 1383 | } |
| 1384 | write_unlock_bh(&nf_conntrack_lock); |
| 1385 | } else { |
| 1386 | /* This basically means we have to flush everything*/ |
| 1387 | write_lock_bh(&nf_conntrack_lock); |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 1388 | list_for_each_entry_safe(exp, tmp, &nf_ct_expect_list, list) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1389 | if (del_timer(&exp->timeout)) { |
| 1390 | nf_ct_unlink_expect(exp); |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 1391 | nf_ct_expect_put(exp); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1392 | } |
| 1393 | } |
| 1394 | write_unlock_bh(&nf_conntrack_lock); |
| 1395 | } |
| 1396 | |
| 1397 | return 0; |
| 1398 | } |
| 1399 | static int |
| 1400 | ctnetlink_change_expect(struct nf_conntrack_expect *x, struct nfattr *cda[]) |
| 1401 | { |
| 1402 | return -EOPNOTSUPP; |
| 1403 | } |
| 1404 | |
| 1405 | static int |
| 1406 | ctnetlink_create_expect(struct nfattr *cda[], u_int8_t u3) |
| 1407 | { |
| 1408 | struct nf_conntrack_tuple tuple, mask, master_tuple; |
| 1409 | struct nf_conntrack_tuple_hash *h = NULL; |
| 1410 | struct nf_conntrack_expect *exp; |
| 1411 | struct nf_conn *ct; |
Harald Welte | dc808fe | 2006-03-20 17:56:32 -0800 | [diff] [blame] | 1412 | struct nf_conn_help *help; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1413 | int err = 0; |
| 1414 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1415 | /* caller guarantees that those three CTA_EXPECT_* exist */ |
| 1416 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); |
| 1417 | if (err < 0) |
| 1418 | return err; |
| 1419 | err = ctnetlink_parse_tuple(cda, &mask, CTA_EXPECT_MASK, u3); |
| 1420 | if (err < 0) |
| 1421 | return err; |
| 1422 | err = ctnetlink_parse_tuple(cda, &master_tuple, CTA_EXPECT_MASTER, u3); |
| 1423 | if (err < 0) |
| 1424 | return err; |
| 1425 | |
| 1426 | /* Look for master conntrack of this expectation */ |
Patrick McHardy | 330f7db | 2007-07-07 22:28:42 -0700 | [diff] [blame] | 1427 | h = nf_conntrack_find_get(&master_tuple); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1428 | if (!h) |
| 1429 | return -ENOENT; |
| 1430 | ct = nf_ct_tuplehash_to_ctrack(h); |
Harald Welte | dc808fe | 2006-03-20 17:56:32 -0800 | [diff] [blame] | 1431 | help = nfct_help(ct); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1432 | |
Harald Welte | dc808fe | 2006-03-20 17:56:32 -0800 | [diff] [blame] | 1433 | if (!help || !help->helper) { |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1434 | /* such conntrack hasn't got any helper, abort */ |
| 1435 | err = -EINVAL; |
| 1436 | goto out; |
| 1437 | } |
| 1438 | |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 1439 | exp = nf_ct_expect_alloc(ct); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1440 | if (!exp) { |
| 1441 | err = -ENOMEM; |
| 1442 | goto out; |
| 1443 | } |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1444 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1445 | exp->expectfn = NULL; |
| 1446 | exp->flags = 0; |
| 1447 | exp->master = ct; |
Patrick McHardy | 9457d85 | 2006-12-02 22:05:25 -0800 | [diff] [blame] | 1448 | exp->helper = NULL; |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1449 | memcpy(&exp->tuple, &tuple, sizeof(struct nf_conntrack_tuple)); |
| 1450 | memcpy(&exp->mask, &mask, sizeof(struct nf_conntrack_tuple)); |
| 1451 | |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 1452 | err = nf_ct_expect_related(exp); |
| 1453 | nf_ct_expect_put(exp); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1454 | |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1455 | out: |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1456 | nf_ct_put(nf_ct_tuplehash_to_ctrack(h)); |
| 1457 | return err; |
| 1458 | } |
| 1459 | |
| 1460 | static int |
| 1461 | ctnetlink_new_expect(struct sock *ctnl, struct sk_buff *skb, |
Thomas Graf | 1d00a4e | 2007-03-22 23:30:12 -0700 | [diff] [blame] | 1462 | struct nlmsghdr *nlh, struct nfattr *cda[]) |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1463 | { |
| 1464 | struct nf_conntrack_tuple tuple; |
| 1465 | struct nf_conntrack_expect *exp; |
| 1466 | struct nfgenmsg *nfmsg = NLMSG_DATA(nlh); |
| 1467 | u_int8_t u3 = nfmsg->nfgen_family; |
| 1468 | int err = 0; |
| 1469 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1470 | if (nfattr_bad_size(cda, CTA_EXPECT_MAX, cta_min_exp)) |
| 1471 | return -EINVAL; |
| 1472 | |
| 1473 | if (!cda[CTA_EXPECT_TUPLE-1] |
| 1474 | || !cda[CTA_EXPECT_MASK-1] |
| 1475 | || !cda[CTA_EXPECT_MASTER-1]) |
| 1476 | return -EINVAL; |
| 1477 | |
| 1478 | err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE, u3); |
| 1479 | if (err < 0) |
| 1480 | return err; |
| 1481 | |
| 1482 | write_lock_bh(&nf_conntrack_lock); |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 1483 | exp = __nf_ct_expect_find(&tuple); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1484 | |
| 1485 | if (!exp) { |
| 1486 | write_unlock_bh(&nf_conntrack_lock); |
| 1487 | err = -ENOENT; |
| 1488 | if (nlh->nlmsg_flags & NLM_F_CREATE) |
| 1489 | err = ctnetlink_create_expect(cda, u3); |
| 1490 | return err; |
| 1491 | } |
| 1492 | |
| 1493 | err = -EEXIST; |
| 1494 | if (!(nlh->nlmsg_flags & NLM_F_EXCL)) |
| 1495 | err = ctnetlink_change_expect(exp, cda); |
| 1496 | write_unlock_bh(&nf_conntrack_lock); |
| 1497 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1498 | return err; |
| 1499 | } |
| 1500 | |
| 1501 | #ifdef CONFIG_NF_CONNTRACK_EVENTS |
| 1502 | static struct notifier_block ctnl_notifier = { |
| 1503 | .notifier_call = ctnetlink_conntrack_event, |
| 1504 | }; |
| 1505 | |
| 1506 | static struct notifier_block ctnl_notifier_exp = { |
| 1507 | .notifier_call = ctnetlink_expect_event, |
| 1508 | }; |
| 1509 | #endif |
| 1510 | |
| 1511 | static struct nfnl_callback ctnl_cb[IPCTNL_MSG_MAX] = { |
| 1512 | [IPCTNL_MSG_CT_NEW] = { .call = ctnetlink_new_conntrack, |
| 1513 | .attr_count = CTA_MAX, }, |
| 1514 | [IPCTNL_MSG_CT_GET] = { .call = ctnetlink_get_conntrack, |
| 1515 | .attr_count = CTA_MAX, }, |
| 1516 | [IPCTNL_MSG_CT_DELETE] = { .call = ctnetlink_del_conntrack, |
| 1517 | .attr_count = CTA_MAX, }, |
| 1518 | [IPCTNL_MSG_CT_GET_CTRZERO] = { .call = ctnetlink_get_conntrack, |
| 1519 | .attr_count = CTA_MAX, }, |
| 1520 | }; |
| 1521 | |
| 1522 | static struct nfnl_callback ctnl_exp_cb[IPCTNL_MSG_EXP_MAX] = { |
| 1523 | [IPCTNL_MSG_EXP_GET] = { .call = ctnetlink_get_expect, |
| 1524 | .attr_count = CTA_EXPECT_MAX, }, |
| 1525 | [IPCTNL_MSG_EXP_NEW] = { .call = ctnetlink_new_expect, |
| 1526 | .attr_count = CTA_EXPECT_MAX, }, |
| 1527 | [IPCTNL_MSG_EXP_DELETE] = { .call = ctnetlink_del_expect, |
| 1528 | .attr_count = CTA_EXPECT_MAX, }, |
| 1529 | }; |
| 1530 | |
| 1531 | static struct nfnetlink_subsystem ctnl_subsys = { |
| 1532 | .name = "conntrack", |
| 1533 | .subsys_id = NFNL_SUBSYS_CTNETLINK, |
| 1534 | .cb_count = IPCTNL_MSG_MAX, |
| 1535 | .cb = ctnl_cb, |
| 1536 | }; |
| 1537 | |
| 1538 | static struct nfnetlink_subsystem ctnl_exp_subsys = { |
| 1539 | .name = "conntrack_expect", |
| 1540 | .subsys_id = NFNL_SUBSYS_CTNETLINK_EXP, |
| 1541 | .cb_count = IPCTNL_MSG_EXP_MAX, |
| 1542 | .cb = ctnl_exp_cb, |
| 1543 | }; |
| 1544 | |
Patrick McHardy | d2483dd | 2006-12-02 22:06:05 -0800 | [diff] [blame] | 1545 | MODULE_ALIAS("ip_conntrack_netlink"); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1546 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK); |
Pablo Neira Ayuso | 34f9a2e | 2006-02-04 02:11:41 -0800 | [diff] [blame] | 1547 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_CTNETLINK_EXP); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1548 | |
| 1549 | static int __init ctnetlink_init(void) |
| 1550 | { |
| 1551 | int ret; |
| 1552 | |
| 1553 | printk("ctnetlink v%s: registering with nfnetlink.\n", version); |
| 1554 | ret = nfnetlink_subsys_register(&ctnl_subsys); |
| 1555 | if (ret < 0) { |
| 1556 | printk("ctnetlink_init: cannot register with nfnetlink.\n"); |
| 1557 | goto err_out; |
| 1558 | } |
| 1559 | |
| 1560 | ret = nfnetlink_subsys_register(&ctnl_exp_subsys); |
| 1561 | if (ret < 0) { |
| 1562 | printk("ctnetlink_init: cannot register exp with nfnetlink.\n"); |
| 1563 | goto err_unreg_subsys; |
| 1564 | } |
| 1565 | |
| 1566 | #ifdef CONFIG_NF_CONNTRACK_EVENTS |
| 1567 | ret = nf_conntrack_register_notifier(&ctnl_notifier); |
| 1568 | if (ret < 0) { |
| 1569 | printk("ctnetlink_init: cannot register notifier.\n"); |
| 1570 | goto err_unreg_exp_subsys; |
| 1571 | } |
| 1572 | |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 1573 | ret = nf_ct_expect_register_notifier(&ctnl_notifier_exp); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1574 | if (ret < 0) { |
| 1575 | printk("ctnetlink_init: cannot expect register notifier.\n"); |
| 1576 | goto err_unreg_notifier; |
| 1577 | } |
| 1578 | #endif |
| 1579 | |
| 1580 | return 0; |
| 1581 | |
| 1582 | #ifdef CONFIG_NF_CONNTRACK_EVENTS |
| 1583 | err_unreg_notifier: |
| 1584 | nf_conntrack_unregister_notifier(&ctnl_notifier); |
| 1585 | err_unreg_exp_subsys: |
| 1586 | nfnetlink_subsys_unregister(&ctnl_exp_subsys); |
| 1587 | #endif |
| 1588 | err_unreg_subsys: |
| 1589 | nfnetlink_subsys_unregister(&ctnl_subsys); |
| 1590 | err_out: |
| 1591 | return ret; |
| 1592 | } |
| 1593 | |
| 1594 | static void __exit ctnetlink_exit(void) |
| 1595 | { |
| 1596 | printk("ctnetlink: unregistering from nfnetlink.\n"); |
| 1597 | |
| 1598 | #ifdef CONFIG_NF_CONNTRACK_EVENTS |
Patrick McHardy | 6823645 | 2007-07-07 22:30:49 -0700 | [diff] [blame] | 1599 | nf_ct_expect_unregister_notifier(&ctnl_notifier_exp); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 1600 | nf_conntrack_unregister_notifier(&ctnl_notifier); |
| 1601 | #endif |
| 1602 | |
| 1603 | nfnetlink_subsys_unregister(&ctnl_exp_subsys); |
| 1604 | nfnetlink_subsys_unregister(&ctnl_subsys); |
| 1605 | return; |
| 1606 | } |
| 1607 | |
| 1608 | module_init(ctnetlink_init); |
| 1609 | module_exit(ctnetlink_exit); |