Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Connection state tracking for netfilter. This is separated from, |
| 3 | * but required by, the (future) NAT layer; it can also be used by an iptables |
| 4 | * extension. |
| 5 | * |
| 6 | * 16 Dec 2003: Yasuyuki Kozakai @USAGI <yasuyuki.kozakai@toshiba.co.jp> |
| 7 | * - generalize L3 protocol dependent part. |
| 8 | * |
| 9 | * Derived from include/linux/netfiter_ipv4/ip_conntrack.h |
| 10 | */ |
| 11 | |
| 12 | #ifndef _NF_CONNTRACK_H |
| 13 | #define _NF_CONNTRACK_H |
| 14 | |
| 15 | #include <linux/netfilter/nf_conntrack_common.h> |
| 16 | |
| 17 | #ifdef __KERNEL__ |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 18 | #include <linux/bitops.h> |
| 19 | #include <linux/compiler.h> |
| 20 | #include <asm/atomic.h> |
| 21 | |
| 22 | #include <linux/netfilter/nf_conntrack_tcp.h> |
Patrick McHardy | 2bc7804 | 2008-03-20 15:15:55 +0100 | [diff] [blame] | 23 | #include <linux/netfilter/nf_conntrack_dccp.h> |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 24 | #include <linux/netfilter/nf_conntrack_sctp.h> |
Patrick McHardy | f09943f | 2006-12-02 22:09:41 -0800 | [diff] [blame] | 25 | #include <linux/netfilter/nf_conntrack_proto_gre.h> |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 26 | #include <net/netfilter/ipv6/nf_conntrack_icmpv6.h> |
| 27 | |
| 28 | #include <net/netfilter/nf_conntrack_tuple.h> |
| 29 | |
| 30 | /* per conntrack: protocol private data */ |
| 31 | union nf_conntrack_proto { |
| 32 | /* insert conntrack proto private data here */ |
Patrick McHardy | 2bc7804 | 2008-03-20 15:15:55 +0100 | [diff] [blame] | 33 | struct nf_ct_dccp dccp; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 34 | struct ip_ct_sctp sctp; |
| 35 | struct ip_ct_tcp tcp; |
Patrick McHardy | f09943f | 2006-12-02 22:09:41 -0800 | [diff] [blame] | 36 | struct nf_ct_gre gre; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 37 | }; |
| 38 | |
| 39 | union nf_conntrack_expect_proto { |
| 40 | /* insert expect proto private data here */ |
| 41 | }; |
| 42 | |
| 43 | /* Add protocol helper include file here */ |
| 44 | #include <linux/netfilter/nf_conntrack_ftp.h> |
Patrick McHardy | f09943f | 2006-12-02 22:09:41 -0800 | [diff] [blame] | 45 | #include <linux/netfilter/nf_conntrack_pptp.h> |
Patrick McHardy | f587de0 | 2006-12-02 22:08:46 -0800 | [diff] [blame] | 46 | #include <linux/netfilter/nf_conntrack_h323.h> |
Michal Schmidt | 6fecd19 | 2007-02-07 15:05:12 -0800 | [diff] [blame] | 47 | #include <linux/netfilter/nf_conntrack_sane.h> |
Patrick McHardy | 0f32a40 | 2008-03-25 20:25:13 -0700 | [diff] [blame] | 48 | #include <linux/netfilter/nf_conntrack_sip.h> |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 49 | |
| 50 | /* per conntrack: application helper private data */ |
| 51 | union nf_conntrack_help { |
| 52 | /* insert conntrack helper private data (master) here */ |
Jozsef Kadlecsik | 55a7332 | 2006-12-02 22:07:44 -0800 | [diff] [blame] | 53 | struct nf_ct_ftp_master ct_ftp_info; |
Patrick McHardy | f09943f | 2006-12-02 22:09:41 -0800 | [diff] [blame] | 54 | struct nf_ct_pptp_master ct_pptp_info; |
Patrick McHardy | f587de0 | 2006-12-02 22:08:46 -0800 | [diff] [blame] | 55 | struct nf_ct_h323_master ct_h323_info; |
Michal Schmidt | 6fecd19 | 2007-02-07 15:05:12 -0800 | [diff] [blame] | 56 | struct nf_ct_sane_master ct_sane_info; |
Patrick McHardy | 0f32a40 | 2008-03-25 20:25:13 -0700 | [diff] [blame] | 57 | struct nf_ct_sip_master ct_sip_info; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 58 | }; |
| 59 | |
| 60 | #include <linux/types.h> |
| 61 | #include <linux/skbuff.h> |
Al Viro | d7fe0f2 | 2006-12-03 23:15:30 -0500 | [diff] [blame] | 62 | #include <linux/timer.h> |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 63 | |
| 64 | #ifdef CONFIG_NETFILTER_DEBUG |
Patrick McHardy | 55871d0 | 2008-04-14 11:15:51 +0200 | [diff] [blame] | 65 | #define NF_CT_ASSERT(x) WARN_ON(!(x)) |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 66 | #else |
| 67 | #define NF_CT_ASSERT(x) |
| 68 | #endif |
| 69 | |
| 70 | struct nf_conntrack_helper; |
| 71 | |
Patrick McHardy | 6002f266 | 2008-03-25 20:09:15 -0700 | [diff] [blame] | 72 | /* Must be kept in sync with the classes defined by helpers */ |
Patrick McHardy | 9d288df | 2010-02-11 12:30:21 +0100 | [diff] [blame] | 73 | #define NF_CT_MAX_EXPECT_CLASSES 4 |
Patrick McHardy | 6002f266 | 2008-03-25 20:09:15 -0700 | [diff] [blame] | 74 | |
Harald Welte | dc808fe | 2006-03-20 17:56:32 -0800 | [diff] [blame] | 75 | /* nf_conn feature for connections that have a helper */ |
| 76 | struct nf_conn_help { |
| 77 | /* Helper. if any */ |
| 78 | struct nf_conntrack_helper *helper; |
| 79 | |
| 80 | union nf_conntrack_help help; |
| 81 | |
Patrick McHardy | b560580 | 2007-07-07 22:35:56 -0700 | [diff] [blame] | 82 | struct hlist_head expectations; |
| 83 | |
Harald Welte | dc808fe | 2006-03-20 17:56:32 -0800 | [diff] [blame] | 84 | /* Current number of expected connections */ |
Patrick McHardy | 6002f266 | 2008-03-25 20:09:15 -0700 | [diff] [blame] | 85 | u8 expecting[NF_CT_MAX_EXPECT_CLASSES]; |
Harald Welte | dc808fe | 2006-03-20 17:56:32 -0800 | [diff] [blame] | 86 | }; |
| 87 | |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 88 | #include <net/netfilter/ipv4/nf_conntrack_ipv4.h> |
Patrick McHardy | f8eb24a | 2006-11-29 02:35:15 +0100 | [diff] [blame] | 89 | #include <net/netfilter/ipv6/nf_conntrack_ipv6.h> |
| 90 | |
Eric Dumazet | ea781f1 | 2009-03-25 21:05:46 +0100 | [diff] [blame] | 91 | struct nf_conn { |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 92 | /* Usage count in here is 1 for hash table/destruct timer, 1 per skb, |
| 93 | plus 1 for any connection(s) we are `master' for */ |
| 94 | struct nf_conntrack ct_general; |
| 95 | |
Patrick McHardy | 440f0d5 | 2009-06-10 14:32:47 +0200 | [diff] [blame] | 96 | spinlock_t lock; |
| 97 | |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 98 | /* XXX should I move this to the tail ? - Y.K */ |
| 99 | /* These are my tuples; original and reply */ |
| 100 | struct nf_conntrack_tuple_hash tuplehash[IP_CT_DIR_MAX]; |
| 101 | |
| 102 | /* Have we seen traffic both ways yet? (bitset) */ |
| 103 | unsigned long status; |
| 104 | |
Harald Welte | dc808fe | 2006-03-20 17:56:32 -0800 | [diff] [blame] | 105 | /* If we were expected by an expectation, this will be it */ |
| 106 | struct nf_conn *master; |
| 107 | |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 108 | /* Timer function; drops refcnt when it goes off. */ |
| 109 | struct timer_list timeout; |
| 110 | |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 111 | #if defined(CONFIG_NF_CONNTRACK_MARK) |
| 112 | u_int32_t mark; |
| 113 | #endif |
| 114 | |
James Morris | 7c9728c | 2006-06-09 00:31:46 -0700 | [diff] [blame] | 115 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
| 116 | u_int32_t secmark; |
| 117 | #endif |
| 118 | |
Harald Welte | dc808fe | 2006-03-20 17:56:32 -0800 | [diff] [blame] | 119 | /* Storage reserved for other modules: */ |
| 120 | union nf_conntrack_proto proto; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 121 | |
Yasuyuki Kozakai | ecfab2c | 2007-07-07 22:23:21 -0700 | [diff] [blame] | 122 | /* Extensions */ |
| 123 | struct nf_ct_ext *ext; |
Alexey Dobriyan | 5a1fb39 | 2008-10-08 11:35:02 +0200 | [diff] [blame] | 124 | #ifdef CONFIG_NET_NS |
| 125 | struct net *ct_net; |
| 126 | #endif |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 127 | }; |
| 128 | |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 129 | static inline struct nf_conn * |
| 130 | nf_ct_tuplehash_to_ctrack(const struct nf_conntrack_tuple_hash *hash) |
| 131 | { |
| 132 | return container_of(hash, struct nf_conn, |
| 133 | tuplehash[hash->tuple.dst.dir]); |
| 134 | } |
| 135 | |
Patrick McHardy | 5e8fbe2 | 2008-04-14 11:15:52 +0200 | [diff] [blame] | 136 | static inline u_int16_t nf_ct_l3num(const struct nf_conn *ct) |
| 137 | { |
| 138 | return ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.l3num; |
| 139 | } |
| 140 | |
| 141 | static inline u_int8_t nf_ct_protonum(const struct nf_conn *ct) |
| 142 | { |
| 143 | return ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.protonum; |
| 144 | } |
| 145 | |
Pablo Neira Ayuso | f2f3e38 | 2009-06-02 20:03:35 +0200 | [diff] [blame] | 146 | #define nf_ct_tuple(ct, dir) (&(ct)->tuplehash[dir].tuple) |
| 147 | |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 148 | /* get master conntrack via master expectation */ |
| 149 | #define master_ct(conntr) (conntr->master) |
| 150 | |
Alexey Dobriyan | 5a1fb39 | 2008-10-08 11:35:02 +0200 | [diff] [blame] | 151 | extern struct net init_net; |
| 152 | |
| 153 | static inline struct net *nf_ct_net(const struct nf_conn *ct) |
| 154 | { |
| 155 | #ifdef CONFIG_NET_NS |
| 156 | return ct->ct_net; |
| 157 | #else |
| 158 | return &init_net; |
| 159 | #endif |
| 160 | } |
| 161 | |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 162 | /* Alter reply tuple (maybe alter helper). */ |
| 163 | extern void |
Patrick McHardy | c88130b | 2008-01-31 04:42:11 -0800 | [diff] [blame] | 164 | nf_conntrack_alter_reply(struct nf_conn *ct, |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 165 | const struct nf_conntrack_tuple *newreply); |
| 166 | |
| 167 | /* Is this tuple taken? (ignoring any belonging to the given |
| 168 | conntrack). */ |
| 169 | extern int |
| 170 | nf_conntrack_tuple_taken(const struct nf_conntrack_tuple *tuple, |
| 171 | const struct nf_conn *ignored_conntrack); |
| 172 | |
| 173 | /* Return conntrack_info and tuple hash for given skb. */ |
| 174 | static inline struct nf_conn * |
| 175 | nf_ct_get(const struct sk_buff *skb, enum ip_conntrack_info *ctinfo) |
| 176 | { |
| 177 | *ctinfo = skb->nfctinfo; |
| 178 | return (struct nf_conn *)skb->nfct; |
| 179 | } |
| 180 | |
| 181 | /* decrement reference count on a conntrack */ |
| 182 | static inline void nf_ct_put(struct nf_conn *ct) |
| 183 | { |
| 184 | NF_CT_ASSERT(ct); |
| 185 | nf_conntrack_put(&ct->ct_general); |
| 186 | } |
| 187 | |
Pablo Neira Ayuso | b9f78f9 | 2006-03-22 13:56:08 -0800 | [diff] [blame] | 188 | /* Protocol module loading */ |
| 189 | extern int nf_ct_l3proto_try_module_get(unsigned short l3proto); |
| 190 | extern void nf_ct_l3proto_module_put(unsigned short l3proto); |
| 191 | |
Eric Dumazet | ea781f1 | 2009-03-25 21:05:46 +0100 | [diff] [blame] | 192 | /* |
| 193 | * Allocate a hashtable of hlist_head (if nulls == 0), |
| 194 | * or hlist_nulls_head (if nulls == 1) |
| 195 | */ |
| 196 | extern void *nf_ct_alloc_hashtable(unsigned int *sizep, int *vmalloced, int nulls); |
| 197 | |
| 198 | extern void nf_ct_free_hashtable(void *hash, int vmalloced, unsigned int size); |
Patrick McHardy | ac565e5 | 2007-07-07 22:30:08 -0700 | [diff] [blame] | 199 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 200 | extern struct nf_conntrack_tuple_hash * |
Patrick McHardy | 5d0aa2c | 2010-02-15 18:13:33 +0100 | [diff] [blame] | 201 | __nf_conntrack_find(struct net *net, u16 zone, |
| 202 | const struct nf_conntrack_tuple *tuple); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 203 | |
| 204 | extern void nf_conntrack_hash_insert(struct nf_conn *ct); |
Pablo Neira Ayuso | dd7669a | 2009-06-13 12:30:52 +0200 | [diff] [blame] | 205 | extern void nf_ct_delete_from_lists(struct nf_conn *ct); |
| 206 | extern void nf_ct_insert_dying_list(struct nf_conn *ct); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 207 | |
Pablo Neira Ayuso | 274d383 | 2009-06-02 20:08:38 +0200 | [diff] [blame] | 208 | extern void nf_conntrack_flush_report(struct net *net, u32 pid, int report); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 209 | |
Jan Engelhardt | 5f2b4c9 | 2008-04-14 11:15:53 +0200 | [diff] [blame] | 210 | extern bool nf_ct_get_tuplepr(const struct sk_buff *skb, |
| 211 | unsigned int nhoff, u_int16_t l3num, |
| 212 | struct nf_conntrack_tuple *tuple); |
| 213 | extern bool nf_ct_invert_tuplepr(struct nf_conntrack_tuple *inverse, |
| 214 | const struct nf_conntrack_tuple *orig); |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 215 | |
| 216 | extern void __nf_ct_refresh_acct(struct nf_conn *ct, |
| 217 | enum ip_conntrack_info ctinfo, |
| 218 | const struct sk_buff *skb, |
| 219 | unsigned long extra_jiffies, |
| 220 | int do_acct); |
| 221 | |
| 222 | /* Refresh conntrack for this many jiffies and do accounting */ |
| 223 | static inline void nf_ct_refresh_acct(struct nf_conn *ct, |
| 224 | enum ip_conntrack_info ctinfo, |
| 225 | const struct sk_buff *skb, |
| 226 | unsigned long extra_jiffies) |
| 227 | { |
| 228 | __nf_ct_refresh_acct(ct, ctinfo, skb, extra_jiffies, 1); |
| 229 | } |
| 230 | |
| 231 | /* Refresh conntrack for this many jiffies */ |
| 232 | static inline void nf_ct_refresh(struct nf_conn *ct, |
| 233 | const struct sk_buff *skb, |
| 234 | unsigned long extra_jiffies) |
| 235 | { |
| 236 | __nf_ct_refresh_acct(ct, 0, skb, extra_jiffies, 0); |
| 237 | } |
| 238 | |
David S. Miller | 4c88949 | 2008-07-14 20:22:38 -0700 | [diff] [blame] | 239 | extern bool __nf_ct_kill_acct(struct nf_conn *ct, |
| 240 | enum ip_conntrack_info ctinfo, |
| 241 | const struct sk_buff *skb, |
| 242 | int do_acct); |
Fabian Hugelshofer | 718d4ad | 2008-06-09 15:59:40 -0700 | [diff] [blame] | 243 | |
| 244 | /* kill conntrack and do accounting */ |
David S. Miller | 4c88949 | 2008-07-14 20:22:38 -0700 | [diff] [blame] | 245 | static inline bool nf_ct_kill_acct(struct nf_conn *ct, |
| 246 | enum ip_conntrack_info ctinfo, |
| 247 | const struct sk_buff *skb) |
Fabian Hugelshofer | 718d4ad | 2008-06-09 15:59:40 -0700 | [diff] [blame] | 248 | { |
David S. Miller | 4c88949 | 2008-07-14 20:22:38 -0700 | [diff] [blame] | 249 | return __nf_ct_kill_acct(ct, ctinfo, skb, 1); |
Fabian Hugelshofer | 718d4ad | 2008-06-09 15:59:40 -0700 | [diff] [blame] | 250 | } |
| 251 | |
| 252 | /* kill conntrack without accounting */ |
David S. Miller | 4c88949 | 2008-07-14 20:22:38 -0700 | [diff] [blame] | 253 | static inline bool nf_ct_kill(struct nf_conn *ct) |
Fabian Hugelshofer | 718d4ad | 2008-06-09 15:59:40 -0700 | [diff] [blame] | 254 | { |
David S. Miller | 4c88949 | 2008-07-14 20:22:38 -0700 | [diff] [blame] | 255 | return __nf_ct_kill_acct(ct, 0, NULL, 0); |
Fabian Hugelshofer | 718d4ad | 2008-06-09 15:59:40 -0700 | [diff] [blame] | 256 | } |
Patrick McHardy | 5109176 | 2008-06-09 15:59:06 -0700 | [diff] [blame] | 257 | |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 258 | /* These are for NAT. Icky. */ |
Jozsef Kadlecsik | f9dd09c | 2009-11-06 00:43:42 -0800 | [diff] [blame] | 259 | extern s16 (*nf_ct_nat_offset)(const struct nf_conn *ct, |
| 260 | enum ip_conntrack_dir dir, |
| 261 | u32 seq); |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 262 | |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 263 | /* Fake conntrack entry for untracked connections */ |
Eric Dumazet | 5bfddbd | 2010-06-08 16:09:52 +0200 | [diff] [blame^] | 264 | static inline struct nf_conn *nf_ct_untracked_get(void) |
| 265 | { |
| 266 | extern struct nf_conn nf_conntrack_untracked; |
| 267 | |
| 268 | return &nf_conntrack_untracked; |
| 269 | } |
| 270 | extern void nf_ct_untracked_status_or(unsigned long bits); |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 271 | |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 272 | /* Iterate over all conntracks: if iter returns true, it's deleted. */ |
| 273 | extern void |
Alexey Dobriyan | 400dad3 | 2008-10-08 11:35:03 +0200 | [diff] [blame] | 274 | nf_ct_iterate_cleanup(struct net *net, int (*iter)(struct nf_conn *i, void *data), void *data); |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 275 | extern void nf_conntrack_free(struct nf_conn *ct); |
| 276 | extern struct nf_conn * |
Patrick McHardy | 5d0aa2c | 2010-02-15 18:13:33 +0100 | [diff] [blame] | 277 | nf_conntrack_alloc(struct net *net, u16 zone, |
Alexey Dobriyan | 5a1fb39 | 2008-10-08 11:35:02 +0200 | [diff] [blame] | 278 | const struct nf_conntrack_tuple *orig, |
Pablo Neira Ayuso | b891c5a | 2008-07-08 02:35:55 -0700 | [diff] [blame] | 279 | const struct nf_conntrack_tuple *repl, |
| 280 | gfp_t gfp); |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 281 | |
Patrick McHardy | b2a15a6 | 2010-02-03 14:13:03 +0100 | [diff] [blame] | 282 | static inline int nf_ct_is_template(const struct nf_conn *ct) |
| 283 | { |
| 284 | return test_bit(IPS_TEMPLATE_BIT, &ct->status); |
| 285 | } |
| 286 | |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 287 | /* It's confirmed if it is, or has been in the hash table. */ |
| 288 | static inline int nf_ct_is_confirmed(struct nf_conn *ct) |
| 289 | { |
| 290 | return test_bit(IPS_CONFIRMED_BIT, &ct->status); |
| 291 | } |
| 292 | |
| 293 | static inline int nf_ct_is_dying(struct nf_conn *ct) |
| 294 | { |
| 295 | return test_bit(IPS_DYING_BIT, &ct->status); |
| 296 | } |
| 297 | |
Eric Dumazet | 5bfddbd | 2010-06-08 16:09:52 +0200 | [diff] [blame^] | 298 | static inline int nf_ct_is_untracked(const struct nf_conn *ct) |
Patrick McHardy | 587aa64 | 2007-03-14 16:37:25 -0700 | [diff] [blame] | 299 | { |
Eric Dumazet | 5bfddbd | 2010-06-08 16:09:52 +0200 | [diff] [blame^] | 300 | return test_bit(IPS_UNTRACKED_BIT, &ct->status); |
Patrick McHardy | 587aa64 | 2007-03-14 16:37:25 -0700 | [diff] [blame] | 301 | } |
| 302 | |
Patrick McHardy | fae718d | 2007-12-24 21:09:10 -0800 | [diff] [blame] | 303 | extern int nf_conntrack_set_hashsize(const char *val, struct kernel_param *kp); |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 304 | extern unsigned int nf_conntrack_htable_size; |
Hagen Paul Pfeifer | e478075 | 2009-02-20 10:47:09 +0100 | [diff] [blame] | 305 | extern unsigned int nf_conntrack_max; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 306 | |
Alexey Dobriyan | 0d55af8 | 2008-10-08 11:35:07 +0200 | [diff] [blame] | 307 | #define NF_CT_STAT_INC(net, count) \ |
Christoph Lameter | 4ea7334 | 2009-10-03 19:48:22 +0900 | [diff] [blame] | 308 | __this_cpu_inc((net)->ct.stat->count) |
Alexey Dobriyan | 0d55af8 | 2008-10-08 11:35:07 +0200 | [diff] [blame] | 309 | #define NF_CT_STAT_INC_ATOMIC(net, count) \ |
Patrick McHardy | c0e912d | 2007-02-12 11:13:43 -0800 | [diff] [blame] | 310 | do { \ |
| 311 | local_bh_disable(); \ |
Christoph Lameter | 4ea7334 | 2009-10-03 19:48:22 +0900 | [diff] [blame] | 312 | __this_cpu_inc((net)->ct.stat->count); \ |
Patrick McHardy | c0e912d | 2007-02-12 11:13:43 -0800 | [diff] [blame] | 313 | local_bh_enable(); \ |
| 314 | } while (0) |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 315 | |
Pablo Neira Ayuso | 4dc06f9 | 2008-11-17 16:01:42 +0100 | [diff] [blame] | 316 | #define MODULE_ALIAS_NFCT_HELPER(helper) \ |
| 317 | MODULE_ALIAS("nfct-helper-" helper) |
| 318 | |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 319 | #endif /* __KERNEL__ */ |
| 320 | #endif /* _NF_CONNTRACK_H */ |