~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/include/net/netfilter/nf_conntrack_l4proto.h

Version: ~ [ linux-5.10-rc5 ] ~ [ linux-5.9.10 ] ~ [ linux-5.8.18 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.79 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.159 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.208 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.245 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.245 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.85 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 /*
  2  * Header for use in defining a given L4 protocol for connection tracking.
  3  *
  4  * 16 Dec 2003: Yasuyuki Kozakai @USAGI <yasuyuki.kozakai@toshiba.co.jp>
  5  *      - generalized L3 protocol dependent part.
  6  *
  7  * Derived from include/linux/netfiter_ipv4/ip_conntrack_protcol.h
  8  */
  9 
 10 #ifndef _NF_CONNTRACK_L4PROTO_H
 11 #define _NF_CONNTRACK_L4PROTO_H
 12 #include <linux/netlink.h>
 13 #include <net/netlink.h>
 14 #include <net/netfilter/nf_conntrack.h>
 15 #include <net/netns/generic.h>
 16 
 17 struct seq_file;
 18 
 19 struct nf_conntrack_l4proto {
 20         /* L3 Protocol number. */
 21         u_int16_t l3proto;
 22 
 23         /* L4 Protocol number. */
 24         u_int8_t l4proto;
 25 
 26         /* Resolve clashes on insertion races. */
 27         bool allow_clash;
 28 
 29         /* Try to fill in the third arg: dataoff is offset past network protocol
 30            hdr.  Return true if possible. */
 31         bool (*pkt_to_tuple)(const struct sk_buff *skb, unsigned int dataoff,
 32                              struct net *net, struct nf_conntrack_tuple *tuple);
 33 
 34         /* Invert the per-proto part of the tuple: ie. turn xmit into reply.
 35          * Some packets can't be inverted: return 0 in that case.
 36          */
 37         bool (*invert_tuple)(struct nf_conntrack_tuple *inverse,
 38                              const struct nf_conntrack_tuple *orig);
 39 
 40         /* Returns verdict for packet, or -1 for invalid. */
 41         int (*packet)(struct nf_conn *ct,
 42                       const struct sk_buff *skb,
 43                       unsigned int dataoff,
 44                       enum ip_conntrack_info ctinfo,
 45                       u_int8_t pf,
 46                       unsigned int hooknum,
 47                       unsigned int *timeouts);
 48 
 49         /* Called when a new connection for this protocol found;
 50          * returns TRUE if it's OK.  If so, packet() called next. */
 51         bool (*new)(struct nf_conn *ct, const struct sk_buff *skb,
 52                     unsigned int dataoff, unsigned int *timeouts);
 53 
 54         /* Called when a conntrack entry is destroyed */
 55         void (*destroy)(struct nf_conn *ct);
 56 
 57         int (*error)(struct net *net, struct nf_conn *tmpl, struct sk_buff *skb,
 58                      unsigned int dataoff, enum ip_conntrack_info *ctinfo,
 59                      u_int8_t pf, unsigned int hooknum);
 60 
 61         /* Print out the per-protocol part of the tuple. Return like seq_* */
 62         void (*print_tuple)(struct seq_file *s,
 63                             const struct nf_conntrack_tuple *);
 64 
 65         /* Print out the private part of the conntrack. */
 66         void (*print_conntrack)(struct seq_file *s, struct nf_conn *);
 67 
 68         /* Return the array of timeouts for this protocol. */
 69         unsigned int *(*get_timeouts)(struct net *net);
 70 
 71         /* convert protoinfo to nfnetink attributes */
 72         int (*to_nlattr)(struct sk_buff *skb, struct nlattr *nla,
 73                          struct nf_conn *ct);
 74         /* Calculate protoinfo nlattr size */
 75         int (*nlattr_size)(void);
 76 
 77         /* convert nfnetlink attributes to protoinfo */
 78         int (*from_nlattr)(struct nlattr *tb[], struct nf_conn *ct);
 79 
 80         int (*tuple_to_nlattr)(struct sk_buff *skb,
 81                                const struct nf_conntrack_tuple *t);
 82         /* Calculate tuple nlattr size */
 83         int (*nlattr_tuple_size)(void);
 84         int (*nlattr_to_tuple)(struct nlattr *tb[],
 85                                struct nf_conntrack_tuple *t);
 86         const struct nla_policy *nla_policy;
 87 
 88         size_t nla_size;
 89 
 90 #if IS_ENABLED(CONFIG_NF_CT_NETLINK_TIMEOUT)
 91         struct {
 92                 size_t obj_size;
 93                 int (*nlattr_to_obj)(struct nlattr *tb[],
 94                                      struct net *net, void *data);
 95                 int (*obj_to_nlattr)(struct sk_buff *skb, const void *data);
 96 
 97                 unsigned int nlattr_max;
 98                 const struct nla_policy *nla_policy;
 99         } ctnl_timeout;
100 #endif
101         int     *net_id;
102         /* Init l4proto pernet data */
103         int (*init_net)(struct net *net, u_int16_t proto);
104 
105         /* Return the per-net protocol part. */
106         struct nf_proto_net *(*get_net_proto)(struct net *net);
107 
108         /* Protocol name */
109         const char *name;
110 
111         /* Module (if any) which this is connected to. */
112         struct module *me;
113 };
114 
115 /* Existing built-in generic protocol */
116 extern struct nf_conntrack_l4proto nf_conntrack_l4proto_generic;
117 
118 #define MAX_NF_CT_PROTO 256
119 
120 struct nf_conntrack_l4proto *__nf_ct_l4proto_find(u_int16_t l3proto,
121                                                   u_int8_t l4proto);
122 
123 struct nf_conntrack_l4proto *nf_ct_l4proto_find_get(u_int16_t l3proto,
124                                                     u_int8_t l4proto);
125 void nf_ct_l4proto_put(struct nf_conntrack_l4proto *p);
126 
127 /* Protocol pernet registration. */
128 int nf_ct_l4proto_pernet_register(struct net *net,
129                                   struct nf_conntrack_l4proto *proto);
130 void nf_ct_l4proto_pernet_unregister(struct net *net,
131                                      struct nf_conntrack_l4proto *proto);
132 
133 /* Protocol global registration. */
134 int nf_ct_l4proto_register(struct nf_conntrack_l4proto *proto);
135 void nf_ct_l4proto_unregister(struct nf_conntrack_l4proto *proto);
136 
137 static inline void nf_ct_kfree_compat_sysctl_table(struct nf_proto_net *pn)
138 {
139 #if defined(CONFIG_SYSCTL) && defined(CONFIG_NF_CONNTRACK_PROC_COMPAT)
140         kfree(pn->ctl_compat_table);
141         pn->ctl_compat_table = NULL;
142 #endif
143 }
144 
145 /* Generic netlink helpers */
146 int nf_ct_port_tuple_to_nlattr(struct sk_buff *skb,
147                                const struct nf_conntrack_tuple *tuple);
148 int nf_ct_port_nlattr_to_tuple(struct nlattr *tb[],
149                                struct nf_conntrack_tuple *t);
150 int nf_ct_port_nlattr_tuple_size(void);
151 extern const struct nla_policy nf_ct_port_nla_policy[];
152 
153 #ifdef CONFIG_SYSCTL
154 #define LOG_INVALID(net, proto)                         \
155         ((net)->ct.sysctl_log_invalid == (proto) ||     \
156          (net)->ct.sysctl_log_invalid == IPPROTO_RAW)
157 #else
158 static inline int LOG_INVALID(struct net *net, int proto) { return 0; }
159 #endif /* CONFIG_SYSCTL */
160 
161 #endif /*_NF_CONNTRACK_PROTOCOL_H*/
162 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp