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 | |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 17 | #include <linux/bitops.h> |
| 18 | #include <linux/compiler.h> |
Arun Sharma | 60063497 | 2011-07-26 16:09:06 -0700 | [diff] [blame] | 19 | #include <linux/atomic.h> |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 20 | |
| 21 | #include <linux/netfilter/nf_conntrack_tcp.h> |
Patrick McHardy | 2bc7804 | 2008-03-20 15:15:55 +0100 | [diff] [blame] | 22 | #include <linux/netfilter/nf_conntrack_dccp.h> |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 23 | #include <linux/netfilter/nf_conntrack_sctp.h> |
Patrick McHardy | f09943f | 2006-12-02 22:09:41 -0800 | [diff] [blame] | 24 | #include <linux/netfilter/nf_conntrack_proto_gre.h> |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 25 | #include <net/netfilter/ipv6/nf_conntrack_icmpv6.h> |
| 26 | |
| 27 | #include <net/netfilter/nf_conntrack_tuple.h> |
| 28 | |
| 29 | /* per conntrack: protocol private data */ |
| 30 | union nf_conntrack_proto { |
| 31 | /* insert conntrack proto private data here */ |
Patrick McHardy | 2bc7804 | 2008-03-20 15:15:55 +0100 | [diff] [blame] | 32 | struct nf_ct_dccp dccp; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 33 | struct ip_ct_sctp sctp; |
| 34 | struct ip_ct_tcp tcp; |
Patrick McHardy | f09943f | 2006-12-02 22:09:41 -0800 | [diff] [blame] | 35 | struct nf_ct_gre gre; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 36 | }; |
| 37 | |
| 38 | union nf_conntrack_expect_proto { |
| 39 | /* insert expect proto private data here */ |
| 40 | }; |
| 41 | |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 42 | #include <linux/types.h> |
| 43 | #include <linux/skbuff.h> |
Al Viro | d7fe0f2 | 2006-12-03 23:15:30 -0500 | [diff] [blame] | 44 | #include <linux/timer.h> |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 45 | |
| 46 | #ifdef CONFIG_NETFILTER_DEBUG |
Patrick McHardy | 55871d0 | 2008-04-14 11:15:51 +0200 | [diff] [blame] | 47 | #define NF_CT_ASSERT(x) WARN_ON(!(x)) |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 48 | #else |
| 49 | #define NF_CT_ASSERT(x) |
| 50 | #endif |
| 51 | |
| 52 | struct nf_conntrack_helper; |
| 53 | |
Patrick McHardy | 6002f266 | 2008-03-25 20:09:15 -0700 | [diff] [blame] | 54 | /* Must be kept in sync with the classes defined by helpers */ |
Patrick McHardy | 9d288df | 2010-02-11 12:30:21 +0100 | [diff] [blame] | 55 | #define NF_CT_MAX_EXPECT_CLASSES 4 |
Patrick McHardy | 6002f266 | 2008-03-25 20:09:15 -0700 | [diff] [blame] | 56 | |
Harald Welte | dc808fe | 2006-03-20 17:56:32 -0800 | [diff] [blame] | 57 | /* nf_conn feature for connections that have a helper */ |
| 58 | struct nf_conn_help { |
| 59 | /* Helper. if any */ |
Arnd Bergmann | 0906a37 | 2010-03-09 20:59:15 +0100 | [diff] [blame] | 60 | struct nf_conntrack_helper __rcu *helper; |
Harald Welte | dc808fe | 2006-03-20 17:56:32 -0800 | [diff] [blame] | 61 | |
Patrick McHardy | b560580 | 2007-07-07 22:35:56 -0700 | [diff] [blame] | 62 | struct hlist_head expectations; |
| 63 | |
Harald Welte | dc808fe | 2006-03-20 17:56:32 -0800 | [diff] [blame] | 64 | /* Current number of expected connections */ |
Patrick McHardy | 6002f266 | 2008-03-25 20:09:15 -0700 | [diff] [blame] | 65 | u8 expecting[NF_CT_MAX_EXPECT_CLASSES]; |
Pablo Neira Ayuso | 1afc567 | 2012-06-07 12:11:50 +0200 | [diff] [blame] | 66 | |
| 67 | /* private helper information. */ |
| 68 | char data[]; |
Harald Welte | dc808fe | 2006-03-20 17:56:32 -0800 | [diff] [blame] | 69 | }; |
| 70 | |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 71 | #include <net/netfilter/ipv4/nf_conntrack_ipv4.h> |
Patrick McHardy | f8eb24a | 2006-11-29 02:35:15 +0100 | [diff] [blame] | 72 | #include <net/netfilter/ipv6/nf_conntrack_ipv6.h> |
| 73 | |
Eric Dumazet | ea781f1 | 2009-03-25 21:05:46 +0100 | [diff] [blame] | 74 | struct nf_conn { |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 75 | /* Usage count in here is 1 for hash table/destruct timer, 1 per skb, |
Jesper Dangaard Brouer | b476b72 | 2014-03-03 14:44:54 +0100 | [diff] [blame] | 76 | * plus 1 for any connection(s) we are `master' for |
| 77 | * |
| 78 | * Hint, SKB address this struct and refcnt via skb->nfct and |
| 79 | * helpers nf_conntrack_get() and nf_conntrack_put(). |
| 80 | * Helper nf_ct_put() equals nf_conntrack_put() by dec refcnt, |
| 81 | * beware nf_ct_get() is different and don't inc refcnt. |
| 82 | */ |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 83 | struct nf_conntrack ct_general; |
| 84 | |
Jesper Dangaard Brouer | b7779d0 | 2014-03-03 14:45:20 +0100 | [diff] [blame^] | 85 | spinlock_t lock; |
| 86 | u16 cpu; |
Patrick McHardy | 440f0d5 | 2009-06-10 14:32:47 +0200 | [diff] [blame] | 87 | |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 88 | /* XXX should I move this to the tail ? - Y.K */ |
| 89 | /* These are my tuples; original and reply */ |
| 90 | struct nf_conntrack_tuple_hash tuplehash[IP_CT_DIR_MAX]; |
| 91 | |
| 92 | /* Have we seen traffic both ways yet? (bitset) */ |
| 93 | unsigned long status; |
| 94 | |
Harald Welte | dc808fe | 2006-03-20 17:56:32 -0800 | [diff] [blame] | 95 | /* If we were expected by an expectation, this will be it */ |
| 96 | struct nf_conn *master; |
| 97 | |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 98 | /* Timer function; drops refcnt when it goes off. */ |
| 99 | struct timer_list timeout; |
| 100 | |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 101 | #if defined(CONFIG_NF_CONNTRACK_MARK) |
| 102 | u_int32_t mark; |
| 103 | #endif |
| 104 | |
James Morris | 7c9728c | 2006-06-09 00:31:46 -0700 | [diff] [blame] | 105 | #ifdef CONFIG_NF_CONNTRACK_SECMARK |
| 106 | u_int32_t secmark; |
| 107 | #endif |
| 108 | |
Yasuyuki Kozakai | ecfab2c | 2007-07-07 22:23:21 -0700 | [diff] [blame] | 109 | /* Extensions */ |
| 110 | struct nf_ct_ext *ext; |
Alexey Dobriyan | 5a1fb39 | 2008-10-08 11:35:02 +0200 | [diff] [blame] | 111 | #ifdef CONFIG_NET_NS |
| 112 | struct net *ct_net; |
| 113 | #endif |
Changli Gao | e5fc9e7 | 2010-11-12 17:33:17 +0100 | [diff] [blame] | 114 | |
| 115 | /* Storage reserved for other modules, must be the last member */ |
| 116 | union nf_conntrack_proto proto; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 117 | }; |
| 118 | |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 119 | static inline struct nf_conn * |
| 120 | nf_ct_tuplehash_to_ctrack(const struct nf_conntrack_tuple_hash *hash) |
| 121 | { |
| 122 | return container_of(hash, struct nf_conn, |
| 123 | tuplehash[hash->tuple.dst.dir]); |
| 124 | } |
| 125 | |
Patrick McHardy | 5e8fbe2 | 2008-04-14 11:15:52 +0200 | [diff] [blame] | 126 | static inline u_int16_t nf_ct_l3num(const struct nf_conn *ct) |
| 127 | { |
| 128 | return ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.l3num; |
| 129 | } |
| 130 | |
| 131 | static inline u_int8_t nf_ct_protonum(const struct nf_conn *ct) |
| 132 | { |
| 133 | return ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.protonum; |
| 134 | } |
| 135 | |
Pablo Neira Ayuso | f2f3e38 | 2009-06-02 20:03:35 +0200 | [diff] [blame] | 136 | #define nf_ct_tuple(ct, dir) (&(ct)->tuplehash[dir].tuple) |
| 137 | |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 138 | /* get master conntrack via master expectation */ |
| 139 | #define master_ct(conntr) (conntr->master) |
| 140 | |
Alexey Dobriyan | 5a1fb39 | 2008-10-08 11:35:02 +0200 | [diff] [blame] | 141 | extern struct net init_net; |
| 142 | |
| 143 | static inline struct net *nf_ct_net(const struct nf_conn *ct) |
| 144 | { |
Eric Dumazet | c2d9ba9 | 2010-06-01 06:51:19 +0000 | [diff] [blame] | 145 | return read_pnet(&ct->ct_net); |
Alexey Dobriyan | 5a1fb39 | 2008-10-08 11:35:02 +0200 | [diff] [blame] | 146 | } |
| 147 | |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 148 | /* Alter reply tuple (maybe alter helper). */ |
Joe Perches | 4e77be4 | 2013-09-23 11:37:48 -0700 | [diff] [blame] | 149 | void nf_conntrack_alter_reply(struct nf_conn *ct, |
| 150 | const struct nf_conntrack_tuple *newreply); |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 151 | |
| 152 | /* Is this tuple taken? (ignoring any belonging to the given |
| 153 | conntrack). */ |
Joe Perches | 4e77be4 | 2013-09-23 11:37:48 -0700 | [diff] [blame] | 154 | int nf_conntrack_tuple_taken(const struct nf_conntrack_tuple *tuple, |
| 155 | const struct nf_conn *ignored_conntrack); |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 156 | |
| 157 | /* Return conntrack_info and tuple hash for given skb. */ |
| 158 | static inline struct nf_conn * |
| 159 | nf_ct_get(const struct sk_buff *skb, enum ip_conntrack_info *ctinfo) |
| 160 | { |
| 161 | *ctinfo = skb->nfctinfo; |
| 162 | return (struct nf_conn *)skb->nfct; |
| 163 | } |
| 164 | |
| 165 | /* decrement reference count on a conntrack */ |
| 166 | static inline void nf_ct_put(struct nf_conn *ct) |
| 167 | { |
| 168 | NF_CT_ASSERT(ct); |
| 169 | nf_conntrack_put(&ct->ct_general); |
| 170 | } |
| 171 | |
Pablo Neira Ayuso | b9f78f9 | 2006-03-22 13:56:08 -0800 | [diff] [blame] | 172 | /* Protocol module loading */ |
Joe Perches | 4e77be4 | 2013-09-23 11:37:48 -0700 | [diff] [blame] | 173 | int nf_ct_l3proto_try_module_get(unsigned short l3proto); |
| 174 | void nf_ct_l3proto_module_put(unsigned short l3proto); |
Pablo Neira Ayuso | b9f78f9 | 2006-03-22 13:56:08 -0800 | [diff] [blame] | 175 | |
Eric Dumazet | ea781f1 | 2009-03-25 21:05:46 +0100 | [diff] [blame] | 176 | /* |
| 177 | * Allocate a hashtable of hlist_head (if nulls == 0), |
| 178 | * or hlist_nulls_head (if nulls == 1) |
| 179 | */ |
Joe Perches | 4e77be4 | 2013-09-23 11:37:48 -0700 | [diff] [blame] | 180 | void *nf_ct_alloc_hashtable(unsigned int *sizep, int nulls); |
Eric Dumazet | ea781f1 | 2009-03-25 21:05:46 +0100 | [diff] [blame] | 181 | |
Joe Perches | 4e77be4 | 2013-09-23 11:37:48 -0700 | [diff] [blame] | 182 | void nf_ct_free_hashtable(void *hash, unsigned int size); |
Patrick McHardy | ac565e5 | 2007-07-07 22:30:08 -0700 | [diff] [blame] | 183 | |
Joe Perches | 4e77be4 | 2013-09-23 11:37:48 -0700 | [diff] [blame] | 184 | struct nf_conntrack_tuple_hash * |
Patrick McHardy | 5d0aa2c | 2010-02-15 18:13:33 +0100 | [diff] [blame] | 185 | __nf_conntrack_find(struct net *net, u16 zone, |
| 186 | const struct nf_conntrack_tuple *tuple); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 187 | |
Joe Perches | 4e77be4 | 2013-09-23 11:37:48 -0700 | [diff] [blame] | 188 | int nf_conntrack_hash_check_insert(struct nf_conn *ct); |
Florian Westphal | 02982c2 | 2013-07-29 15:41:54 +0200 | [diff] [blame] | 189 | bool nf_ct_delete(struct nf_conn *ct, u32 pid, int report); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 190 | |
Joe Perches | 4e77be4 | 2013-09-23 11:37:48 -0700 | [diff] [blame] | 191 | void nf_conntrack_flush_report(struct net *net, u32 portid, int report); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 192 | |
Joe Perches | 4e77be4 | 2013-09-23 11:37:48 -0700 | [diff] [blame] | 193 | bool nf_ct_get_tuplepr(const struct sk_buff *skb, unsigned int nhoff, |
| 194 | u_int16_t l3num, struct nf_conntrack_tuple *tuple); |
| 195 | bool nf_ct_invert_tuplepr(struct nf_conntrack_tuple *inverse, |
| 196 | const struct nf_conntrack_tuple *orig); |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 197 | |
Joe Perches | 4e77be4 | 2013-09-23 11:37:48 -0700 | [diff] [blame] | 198 | void __nf_ct_refresh_acct(struct nf_conn *ct, enum ip_conntrack_info ctinfo, |
| 199 | const struct sk_buff *skb, |
| 200 | unsigned long extra_jiffies, int do_acct); |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 201 | |
| 202 | /* Refresh conntrack for this many jiffies and do accounting */ |
| 203 | static inline void nf_ct_refresh_acct(struct nf_conn *ct, |
| 204 | enum ip_conntrack_info ctinfo, |
| 205 | const struct sk_buff *skb, |
| 206 | unsigned long extra_jiffies) |
| 207 | { |
| 208 | __nf_ct_refresh_acct(ct, ctinfo, skb, extra_jiffies, 1); |
| 209 | } |
| 210 | |
| 211 | /* Refresh conntrack for this many jiffies */ |
| 212 | static inline void nf_ct_refresh(struct nf_conn *ct, |
| 213 | const struct sk_buff *skb, |
| 214 | unsigned long extra_jiffies) |
| 215 | { |
| 216 | __nf_ct_refresh_acct(ct, 0, skb, extra_jiffies, 0); |
| 217 | } |
| 218 | |
Joe Perches | 4e77be4 | 2013-09-23 11:37:48 -0700 | [diff] [blame] | 219 | bool __nf_ct_kill_acct(struct nf_conn *ct, enum ip_conntrack_info ctinfo, |
| 220 | const struct sk_buff *skb, int do_acct); |
Fabian Hugelshofer | 718d4ad | 2008-06-09 15:59:40 -0700 | [diff] [blame] | 221 | |
| 222 | /* kill conntrack and do accounting */ |
David S. Miller | 4c88949 | 2008-07-14 20:22:38 -0700 | [diff] [blame] | 223 | static inline bool nf_ct_kill_acct(struct nf_conn *ct, |
| 224 | enum ip_conntrack_info ctinfo, |
| 225 | const struct sk_buff *skb) |
Fabian Hugelshofer | 718d4ad | 2008-06-09 15:59:40 -0700 | [diff] [blame] | 226 | { |
David S. Miller | 4c88949 | 2008-07-14 20:22:38 -0700 | [diff] [blame] | 227 | return __nf_ct_kill_acct(ct, ctinfo, skb, 1); |
Fabian Hugelshofer | 718d4ad | 2008-06-09 15:59:40 -0700 | [diff] [blame] | 228 | } |
| 229 | |
| 230 | /* kill conntrack without accounting */ |
David S. Miller | 4c88949 | 2008-07-14 20:22:38 -0700 | [diff] [blame] | 231 | static inline bool nf_ct_kill(struct nf_conn *ct) |
Fabian Hugelshofer | 718d4ad | 2008-06-09 15:59:40 -0700 | [diff] [blame] | 232 | { |
David S. Miller | 4c88949 | 2008-07-14 20:22:38 -0700 | [diff] [blame] | 233 | return __nf_ct_kill_acct(ct, 0, NULL, 0); |
Fabian Hugelshofer | 718d4ad | 2008-06-09 15:59:40 -0700 | [diff] [blame] | 234 | } |
Patrick McHardy | 5109176 | 2008-06-09 15:59:06 -0700 | [diff] [blame] | 235 | |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 236 | /* These are for NAT. Icky. */ |
Patrick McHardy | 2d89c68 | 2013-07-28 22:54:10 +0200 | [diff] [blame] | 237 | extern s32 (*nf_ct_nat_offset)(const struct nf_conn *ct, |
Jozsef Kadlecsik | f9dd09c | 2009-11-06 00:43:42 -0800 | [diff] [blame] | 238 | enum ip_conntrack_dir dir, |
| 239 | u32 seq); |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 240 | |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 241 | /* Fake conntrack entry for untracked connections */ |
Eric Dumazet | b3c5163 | 2010-06-09 14:43:38 +0200 | [diff] [blame] | 242 | DECLARE_PER_CPU(struct nf_conn, nf_conntrack_untracked); |
Eric Dumazet | 5bfddbd | 2010-06-08 16:09:52 +0200 | [diff] [blame] | 243 | static inline struct nf_conn *nf_ct_untracked_get(void) |
| 244 | { |
Eric Dumazet | b3c5163 | 2010-06-09 14:43:38 +0200 | [diff] [blame] | 245 | return &__raw_get_cpu_var(nf_conntrack_untracked); |
Eric Dumazet | 5bfddbd | 2010-06-08 16:09:52 +0200 | [diff] [blame] | 246 | } |
Joe Perches | 4e77be4 | 2013-09-23 11:37:48 -0700 | [diff] [blame] | 247 | void nf_ct_untracked_status_or(unsigned long bits); |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 248 | |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 249 | /* Iterate over all conntracks: if iter returns true, it's deleted. */ |
Joe Perches | 4e77be4 | 2013-09-23 11:37:48 -0700 | [diff] [blame] | 250 | void nf_ct_iterate_cleanup(struct net *net, |
| 251 | int (*iter)(struct nf_conn *i, void *data), |
| 252 | void *data, u32 portid, int report); |
| 253 | void nf_conntrack_free(struct nf_conn *ct); |
| 254 | struct nf_conn *nf_conntrack_alloc(struct net *net, u16 zone, |
| 255 | const struct nf_conntrack_tuple *orig, |
| 256 | const struct nf_conntrack_tuple *repl, |
| 257 | gfp_t gfp); |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 258 | |
Patrick McHardy | b2a15a6 | 2010-02-03 14:13:03 +0100 | [diff] [blame] | 259 | static inline int nf_ct_is_template(const struct nf_conn *ct) |
| 260 | { |
| 261 | return test_bit(IPS_TEMPLATE_BIT, &ct->status); |
| 262 | } |
| 263 | |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 264 | /* It's confirmed if it is, or has been in the hash table. */ |
| 265 | static inline int nf_ct_is_confirmed(struct nf_conn *ct) |
| 266 | { |
| 267 | return test_bit(IPS_CONFIRMED_BIT, &ct->status); |
| 268 | } |
| 269 | |
| 270 | static inline int nf_ct_is_dying(struct nf_conn *ct) |
| 271 | { |
| 272 | return test_bit(IPS_DYING_BIT, &ct->status); |
| 273 | } |
| 274 | |
Eric Dumazet | 5bfddbd | 2010-06-08 16:09:52 +0200 | [diff] [blame] | 275 | static inline int nf_ct_is_untracked(const struct nf_conn *ct) |
Patrick McHardy | 587aa64 | 2007-03-14 16:37:25 -0700 | [diff] [blame] | 276 | { |
Eric Dumazet | 5bfddbd | 2010-06-08 16:09:52 +0200 | [diff] [blame] | 277 | return test_bit(IPS_UNTRACKED_BIT, &ct->status); |
Patrick McHardy | 587aa64 | 2007-03-14 16:37:25 -0700 | [diff] [blame] | 278 | } |
| 279 | |
Julian Anastasov | 42c1edd | 2011-06-16 17:29:22 +0200 | [diff] [blame] | 280 | /* Packet is received from loopback */ |
| 281 | static inline bool nf_is_loopback_packet(const struct sk_buff *skb) |
| 282 | { |
| 283 | return skb->dev && skb->skb_iif && skb->dev->flags & IFF_LOOPBACK; |
| 284 | } |
| 285 | |
Paul Gortmaker | 34641c6 | 2011-08-29 13:21:14 -0400 | [diff] [blame] | 286 | struct kernel_param; |
| 287 | |
Joe Perches | 4e77be4 | 2013-09-23 11:37:48 -0700 | [diff] [blame] | 288 | int nf_conntrack_set_hashsize(const char *val, struct kernel_param *kp); |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 289 | extern unsigned int nf_conntrack_htable_size; |
Hagen Paul Pfeifer | e478075 | 2009-02-20 10:47:09 +0100 | [diff] [blame] | 290 | extern unsigned int nf_conntrack_max; |
Changli Gao | f682cef | 2011-01-05 04:23:23 +0000 | [diff] [blame] | 291 | extern unsigned int nf_conntrack_hash_rnd; |
| 292 | void init_nf_conntrack_hash_rnd(void); |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 293 | |
Pablo Neira Ayuso | e53376b | 2014-02-03 20:01:53 +0100 | [diff] [blame] | 294 | void nf_conntrack_tmpl_insert(struct net *net, struct nf_conn *tmpl); |
| 295 | |
Eric Dumazet | ac3a546 | 2012-04-18 06:36:40 +0200 | [diff] [blame] | 296 | #define NF_CT_STAT_INC(net, count) __this_cpu_inc((net)->ct.stat->count) |
| 297 | #define NF_CT_STAT_INC_ATOMIC(net, count) this_cpu_inc((net)->ct.stat->count) |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 298 | |
Pablo Neira Ayuso | 4dc06f9 | 2008-11-17 16:01:42 +0100 | [diff] [blame] | 299 | #define MODULE_ALIAS_NFCT_HELPER(helper) \ |
| 300 | MODULE_ALIAS("nfct-helper-" helper) |
| 301 | |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 302 | #endif /* _NF_CONNTRACK_H */ |