1 /* (C) 1999-2001 Paul `Rusty' Russell
2 * (C) 2002-2004 Netfilter Core Team <coreteam@netfilter.org>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
9 #include <linux/types.h>
10 #include <linux/jiffies.h>
11 #include <linux/timer.h>
12 #include <linux/netfilter.h>
13 #include <net/netfilter/nf_conntrack_l4proto.h>
15 static unsigned int nf_ct_generic_timeout __read_mostly
= 600*HZ
;
17 static bool generic_pkt_to_tuple(const struct sk_buff
*skb
,
19 struct nf_conntrack_tuple
*tuple
)
27 static bool generic_invert_tuple(struct nf_conntrack_tuple
*tuple
,
28 const struct nf_conntrack_tuple
*orig
)
36 /* Print out the per-protocol part of the tuple. */
37 static int generic_print_tuple(struct seq_file
*s
,
38 const struct nf_conntrack_tuple
*tuple
)
43 static unsigned int *generic_get_timeouts(struct net
*net
)
45 return &nf_ct_generic_timeout
;
48 /* Returns verdict for packet, or -1 for invalid. */
49 static int generic_packet(struct nf_conn
*ct
,
50 const struct sk_buff
*skb
,
52 enum ip_conntrack_info ctinfo
,
55 unsigned int *timeout
)
57 nf_ct_refresh_acct(ct
, ctinfo
, skb
, *timeout
);
61 /* Called when a new connection for this protocol found. */
62 static bool generic_new(struct nf_conn
*ct
, const struct sk_buff
*skb
,
63 unsigned int dataoff
, unsigned int *timeouts
)
68 #if IS_ENABLED(CONFIG_NF_CT_NETLINK_TIMEOUT)
70 #include <linux/netfilter/nfnetlink.h>
71 #include <linux/netfilter/nfnetlink_cttimeout.h>
73 static int generic_timeout_nlattr_to_obj(struct nlattr
*tb
[], void *data
)
75 unsigned int *timeout
= data
;
77 if (tb
[CTA_TIMEOUT_GENERIC_TIMEOUT
])
79 ntohl(nla_get_be32(tb
[CTA_TIMEOUT_GENERIC_TIMEOUT
])) * HZ
;
81 /* Set default generic timeout. */
82 *timeout
= nf_ct_generic_timeout
;
89 generic_timeout_obj_to_nlattr(struct sk_buff
*skb
, const void *data
)
91 const unsigned int *timeout
= data
;
93 NLA_PUT_BE32(skb
, CTA_TIMEOUT_GENERIC_TIMEOUT
, htonl(*timeout
/ HZ
));
101 static const struct nla_policy
102 generic_timeout_nla_policy
[CTA_TIMEOUT_GENERIC_MAX
+1] = {
103 [CTA_TIMEOUT_GENERIC_TIMEOUT
] = { .type
= NLA_U32
},
105 #endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */
108 static struct ctl_table_header
*generic_sysctl_header
;
109 static struct ctl_table generic_sysctl_table
[] = {
111 .procname
= "nf_conntrack_generic_timeout",
112 .data
= &nf_ct_generic_timeout
,
113 .maxlen
= sizeof(unsigned int),
115 .proc_handler
= proc_dointvec_jiffies
,
119 #ifdef CONFIG_NF_CONNTRACK_PROC_COMPAT
120 static struct ctl_table generic_compat_sysctl_table
[] = {
122 .procname
= "ip_conntrack_generic_timeout",
123 .data
= &nf_ct_generic_timeout
,
124 .maxlen
= sizeof(unsigned int),
126 .proc_handler
= proc_dointvec_jiffies
,
130 #endif /* CONFIG_NF_CONNTRACK_PROC_COMPAT */
131 #endif /* CONFIG_SYSCTL */
133 struct nf_conntrack_l4proto nf_conntrack_l4proto_generic __read_mostly
=
135 .l3proto
= PF_UNSPEC
,
138 .pkt_to_tuple
= generic_pkt_to_tuple
,
139 .invert_tuple
= generic_invert_tuple
,
140 .print_tuple
= generic_print_tuple
,
141 .packet
= generic_packet
,
142 .get_timeouts
= generic_get_timeouts
,
144 #if IS_ENABLED(CONFIG_NF_CT_NETLINK_TIMEOUT)
146 .nlattr_to_obj
= generic_timeout_nlattr_to_obj
,
147 .obj_to_nlattr
= generic_timeout_obj_to_nlattr
,
148 .nlattr_max
= CTA_TIMEOUT_GENERIC_MAX
,
149 .obj_size
= sizeof(unsigned int),
150 .nla_policy
= generic_timeout_nla_policy
,
152 #endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */
154 .ctl_table_header
= &generic_sysctl_header
,
155 .ctl_table
= generic_sysctl_table
,
156 #ifdef CONFIG_NF_CONNTRACK_PROC_COMPAT
157 .ctl_compat_table
= generic_compat_sysctl_table
,